AIR PURIFIER

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of and priority to Korean Patent Application No. 10-2024-0091782, filed in Korea on Jul. 11, 2024, the entire disclosure(s) of which is hereby incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to an air purifier, and more particularly, to an air purifier which discharges filtered air in upper and lower directions.

BACKGROUND

An air purifier is a device that filters and discharges air inside a predetermined space to reduce dust and bacteria in the air in the corresponding space. The air purifier filters out foreign substances through an air flow in the corresponding space and discharges air from which the foreign substance is removed.

In order to suck the air in a wide range of the corresponding space and to discharge the filtered air, it is possible to initiate a structure of forming an inlet on a circumference surface of a cylindrical case, and discharging the filtered air to the top. However, a device which switches a separate flow to a top to which the filtered air is discharged is provided in order to discharge the filtered air to a long-distance area of the corresponding space to discharge the filtered air to a wide area of an indoor space.

Korean Patent Unexamined Publication No. 10-2018-0000121 discloses a blowing device which flows the air to the top from a lower circumferential surface, and a booster which is disposed above the blowing device and switches the flow of the air discharged to the top.

However, such a structure as a coupling body having a complicated structure is a structure in which it is difficult for a user to arbitrarily separate the booster. Accordingly, there is a problem in that it is difficult for the user to directly manage the booster itself.

Further, in recent years, lights have also been much applied to home appliances, including air purifiers, for increasing convenience and visual satisfaction. However, there may be some difficulties in installing lights while maintaining a basic structure of performing a function of a product without providing inconvenience to the user.

SUMMARY

In view of the above, the present disclosure solves the above-described problems and other problems.

Another object of the present disclosure is to provide an air purifier including a booster which is enabled to be managed by a user.

Yet another object of the present disclosure is to provide an air purifier providing a lighting in the booster. Further, a structure is provided in which the lighting provided by the booster does not provide inconvenience to the user.

Still yet another object of the present disclosure is to provide an air purifier which minimizes a loss of the lighting in a transmission member which transmits a light generated by a lamp.

In order to achieve the objects, the present disclosure provides an air purifier including: a body having an inlet formed on a circumferential surface thereof and an outlet formed on an upper surface thereof; and a booster connected to the body, and switching a flow direction of air which flows through the outlet. The booster includes a booster case including a booster outlet formed in an annular shape, a booster fan disposed inside the booster case, and sending air to the booster outlet, a plurality of lamps emitting light, and a transmission member through which the light emitted by the plurality of lamps passes. A discharge passage is formed inside the booster case, and the discharge passage sends the air flowing by the booster fan to the booster outlet. The transmission member receives the light emitted by the plurality of lamps and guides the light toward the discharge passage.

The discharge passage forms an annular passage.

The transmission member is formed in a form of a ring disk. An inner circumferential surface of the transmission member is disposed to face each of the plurality of lamps.

An outer peripheral end of the transmission member is disposed to face the discharge passage.

The lamp is disposed on a rear surface of the printed circuit board. The lamp has a light emitting surface that emits light to the rear. The transmission member is bent for an inner circumferential surface to face the light emitting surface.

The transmission member has a groove recessed to an inner side of the transmission member on the inner circumferential surface facing the lamp.

The lamp is disposed on a rear surface of the printed circuit board. The lamp has a light emitting surface that emits light in a radially outward direction.

The transmission member has a ring-type plate shape. The light emitting surface is disposed to face the inner circumferential surface of the transmission member.

The inner circumferential surface of the transmission member includes a curved surface area forming a smooth curved surface, and a bent surface area forming a bend. The light emitting surface is disposed to face the bent surface area.

The bent surface area includes a first bent surface facing the light emitting surface, and second bent surfaces disposed at both sides of the first bent surface.

The first bent surface includes a plurality of first ridges in which the lamp is disposed, and a plurality of grooves disposed between the plurality of first ridges, and spaced apart from the lamp further than the first ridge.

The plurality of first grooves are disposed for the light generated by the light emitting surface to be incident.

The second bent surface includes a plurality of second ridges which protrude in a central direction of the transmission member, and a plurality of second grooves disposed between the plurality of second ridges, and spaced apart to the outer side in the radial direction further than the plurality of second ridges, respectively.

A distance between the first ridge and the first groove greater than a distance between the second ridge the second groove.

The booster case includes a front body, and a circumference body disposed on a circumferential of the front body. The front body includes a front wall, and a first inner guide wall extended to a rear on an outer peripheral end of the front wall. The circumference body includes a second inner guide wall spaced apart from the first inner guide wall. The first inner guide wall and the second inner guide wall form the discharge passage.

The transmission member receives the light incident from the lamp and guides the light toward the second inner guide wall.

The transmission member is disposed in a rear of the first inner guide wall. An outer circumferential surface of the transmission member is disposed inwardly spaced from the first inner guide wall.

Details of other embodiments will be included in the detailed description and the accompanying drawings.

Advantageous Effects

According to the air purifier of the present disclosure, there are one or more following effects.

First, there is also an advantage in that through a structure in which a booster is separated from a booster, a user can easily manage the booster.

Second, a lighting can be provided to the booster disposed at an upper side of the body. There is an advantage in that visual satisfaction can be enhanced by light generated in a state in which the air purifier is actuated or generated by the booster.

Third, there is an advantage in that since the light generated by the is irradiated to a discharge passage of the booster, discomfort is not provided to the user. Further, a soft lighting can be provided to the user.

Fourth, by a structure of minimizing bending of a transmission member, it is possible to minimize the loss of light generated by a lamp in the transmission member.

The effects of the present disclosure are not limited to the aforementioned effect, and other effects, which are not mentioned above, will be apparent to a person having ordinary skill in the art from the description of the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of an air purifier according to an embodiment of the present disclosure.

FIG. 2 is a perspective view of an air purifier according to an embodiment of the present disclosure in which a booster is separated from a body.

FIG. 3 is a cross-sectional view of the air purifier according to an embodiment of the present disclosure.

FIG. 4 is a diagram for describing a booster coupler and an upper outlet cover according to an embodiment of the present disclosure.

FIG. 5 is a cross-sectional view of cutting one side of FIG. 4.

FIG. 6 is a perspective view of the booster according to an embodiment of the present disclosure.

FIG. 7 is an exploded perspective view of the booster according to an embodiment of the present disclosure.

FIG. 8 is a cross-sectional view of the booster according to an embodiment of the present disclosure.

FIG. 9 is a one-side perspective view of a rear body according to an embodiment of the present disclosure.

FIG. 10 is a one-side cross-sectional view of the rear body according to an embodiment of the present disclosure.

FIG. 11 is a rear one-side perspective view of a circumference body according to an embodiment of the present disclosure.

FIG. 12 is a view viewed from the rear other side of the circumference body according to an embodiment of the present disclosure.

FIG. 13 is a one-side cross-sectional view of the circumference body according to an embodiment of the present disclosure.

FIG. 14 is an exploded perspective view of the circumference body according to an embodiment of the present disclosure.

FIG. 15 is a rear perspective view of a front body and a fan assembly according to an embodiment of the present disclosure.

FIG. 16 is a one-side cross-sectional view of the front body and the fan assembly according to an embodiment of the present disclosure.

FIG. 17 is an enlarged diagram of enlarging a part of FIG. 16.

FIG. 18 is a rear surface view of the booster for describing placements and forms of the lamp and the transmission member disposed in the rear of the front body according to a second embodiment of the present disclosure.

FIG. 19 is an enlarged diagram of A in FIG. 18.

FIG. 20 is a one-side cross-sectional view for describing placements and forms of the printed circuit board, the lamp, and the transmission member disposed inside the front body according to the second embodiment of the present disclosure.

FIG. 21 is an enlarged diagram of enlarging a part of FIG. 20.

DETAILED DESCRIPTION

Advantages and features of the present disclosure, and methods for accomplishing the same will be more clearly understood from embodiments described in detail below with reference to the accompanying drawings. However, the present disclosure is not limited to embodiments disclosed below but may be implemented in various different forms. However, the exemplary embodiments are provided to make the present disclosure be complete and completely announce the scope of the present disclosure to those skilled in the art to which the present disclosure belongs and the present disclosure is just defined by the scope of the claims. The present disclosure is just defined by the scope of the claims. Throughout the present disclosure, the same reference numerals denote the same elements.

Hereinafter, the present disclosure will be described with reference to drawings for describing an air purifier according to embodiments of the present disclosure.

FIG. 1 is a perspective view of an air purifier according to an embodiment of the present disclosure. FIG. 2 is a perspective view of a state in which a booster is separated from a body in FIG. 1. An appearance of the air purifier according to the present disclosure is described with reference to FIGS. 1 and 2.

The air purifier includes a body 100 in which air is sucked through inlets 112 and 114 formed on a circumferential surface, and the air is discharged through an upper outlet 134 formed on an upper surface. A lower outlet 151 is also formed on a lower surface in the body 100.

The air purifier may include a booster 500 which is disposed at an upper side of the body 100, and switches a flow direction of the air discharged through the upper outlet 134 of the body 100.

The body 100 includes a case 102 forming an appearance. A filter which filters the sucked air and a fan which forms air flowing may be disposed inside the case 102.

The case 102 has a substantially cylindrical structure. The case 102 has the inlets 112 and 114 formed on a circumferential surface thereof in the cylindrical structure. The case 102 has the upper outlet 134 formed on an upper surface thereof. The case 102 has the lower outlet 151 formed on a lower surface thereof.

The case 102 includes an inlet cover 110 which has the inlets 112 and 114. The inlets 112 and 114 include an upper inlet 112 and a lower inlet 114 located below the upper inlet 112. The upper inlet 112, and the lower inlet 114 disposed below the upper inlet 112 are formed in the inlet cover 110.

The case 102 includes an upper outlet cover 130 which has the upper outlet 134. A booster coupler 200 is disposed at an inner side of the upper outlet cover 130.

The case 102 includes a lower outlet cover 150 which has the lower outlet 151.

The case 102 includes an upper cover 155 disposed between the inlet cover 110 and the upper outlet cover 130. The upper cover 155 is disposed above the inlet cover 110. An upper discharge passage 156 to be described below may be formed at an inner side of the upper cover 155.

The body 100 includes a base 300 which separates the case 102 to an upper side from a bottom surface. The base 300 may separate the lower outlet 151 formed in the case 102 to an upper side from a bottom.

The booster coupler 200 coupled to the booster 500 is disposed at an upper portion of the body 100. The booster coupler 200 is disposed at an inner side of the upper outlet 134 formed on the upper surface of the body 100. The upper outlet 134 is formed in an annular shape. The booster coupler 200 is disposed at the inner side of the upper outlet 134 formed in the annular shape.

The booster 500 is separably disposed at the upper portion of the body 100. Accordingly, the booster 500 may be fixedly disposed at the upper portion of the body 100 as illustrated in FIG. 1, or separated to the upper side from the body 100 as illustrated in FIG. 2.

The booster 500 may be disposed inclinedly to the upper surface of the body 100. A booster inlet 502 and a booster outlet 504 are formed in the booster 500. The booster outlet 504 is formed in a different direction from the booster inlet 502. The booster outlet 504 is formed in an opposite direction to the booster inlet 502.

Referring to FIG. 1, the booster 500 may be coupled to the booster coupler 200. The booster 500 may be electrically connected to the body 100 when being coupled to the booster coupler 200.

Referring to FIG. 2, the booster 500 may be separated from the booster coupler 200.

FIG. 3 is a cross-sectional view of the air purifier according to an embodiment of the present disclosure. Hereinafter, an overall configuration of the air purifier will be described with reference to FIG. 3.

The air purifier of the present disclosure includes a body 100 which discharges filtered air to an upper side or a lower side, and a booster 500 which is disposed at the upper side of the body 100 and switches a flow direction of the air discharged to the upper side.

The body 100 includes a case 102 forming an appearance. The case 102 includes an upper outlet cover 130 disposed on an upper surface of the body 100, and a lower outlet cover 150 disposed on a lower surface of the body 100.

The upper outlet cover 130 may be formed in an annular plate shape. An upper outlet 134 opened to the upper side is formed on the upper outlet cover 130. The upper outlet cover 130 includes a plurality of upper outlet grills 132 extended radially. The upper outlet 134 may be formed between the plurality of upper outlet grills 132.

The booster coupler 200 is disposed at the inner side of the upper outlet cover 130.

The lower outlet cover 150 may be formed in the annular plate shape. The lower outlet 151 opened to the lower side is formed on the lower outlet cover 150. The lower outlet cover 150 includes a plurality of lower outlet grills 152 extended radially. The lower outlet 151 may be formed between the plurality of lower outlet grills 152.

The base 300 or a lower fan motor 190 is disposed at the inner side of the lower outlet cover 150.

The case 102 includes an inlet cover 110 which has the inlets 112 and 114. The inlet cover 110 has the upper inlet 112 and the lower inlet 114.

The case 102 includes an upper cover 155 disposed above the inlet cover 110.

The body 100 includes an upper blowing device 160 which filters air introduced through the upper inlet 112 and discharges the filtered air through the upper outlet 134.

The upper blowing device 160 sends air introduced through a circumferential surface to the upper side. The upper blowing device 160 includes an upper filter 162 which filters the air introduced through the upper inlet 112.

The upper filter 162 has a cylindrical shape. Accordingly, the upper filter 162 filters air which flows from the outer side to the inner side of the circumferential surface.

The upper blowing device 160 includes an upper filter frame 164 which has a space in which the upper filter 162 is disposed. The upper filter frame 164 is disposed above a control box 290 described below.

The upper filter frame 164 is extended above the control box 290. The upper filter frame 164 connects the control box 290, and an upper suction panel 166 to be described below. A plurality of upper filter frames spaced in a circumferential direction may be disposed between the control box 290 and the upper suction panel 166.

The upper blowing device 160 includes an upper suction panel 166 disposed above the upper filter 162 and having an upper orifice 167. The upper suction panel 166 is disposed above the upper filter 162. The upper orifice 167 in which air passing through the upper filter 162 flows is formed at a center of the upper suction panel 166.

The upper blowing device 160 includes an upper fan 168 discharging the air passing through the upper filter 162 through the upper outlet 134 and an upper fan motor 170 rotating the upper fan 168.

The upper fan 168 may be a structure in which a fan suction port is formed at a lower side and a fan discharge port is formed at an upper side. The fan discharge port may be opened to radial outer and upper sides. Air may flow from the lower side of the upper fan 168 to the upper side of the upper fan 168 by rotation of the upper fan 168.

The upper blowing device 160 includes an upper fan housing 172 having a space in which the upper fan 168 is disposed and a discharge passage formed above the upper fan 168.

The upper blowing device 160 includes an upper motor housing 176 having a space in which the upper fan motor 170 is disposed. An upper guide vane 174 connected to the upper motor housing 176 may be disposed at an upper portion of the upper fan housing 172. The upper guide vane 174 may have a form of being disposed between the upper fan housing 172 and the upper motor housing 176, and extended radially.

The upper guide vane 174 may reduce rotation components of air which flows to the upper side of the upper fan housing 172.

An upper discharge passage 156 is formed between the upper motor housing 176 and the upper fan housing 172. The upper discharge passage 156 may have an annular passage and have a form of being extended to the upper side.

The body 100 includes the upper cover 155 disposed above the inlet cover 110. The upper cover 155 has the cylindrical shape. The upper discharge passage 156 may be extended to the inner side of the upper cover 155.

The booster coupler 200 is disposed at the inner side of the upper cover 155. The upper discharge passage 156 may be formed between the upper cover 155 and the booster coupler 200. The booster coupler 200 may maintain a range in which the booster 500 is inclined to the upper side.

The booster coupler 200 is coupled to the booster 500. The booster coupler 200 may rotate the booster 500 in a circumferential direction. That is, the booster coupler 200 may change a direction faced by the booster 500 to the circumferential direction.

The upper outlet cover 130 is disposed at upper ends of the upper cover 155 and the booster coupler 200.

The body 100 includes a lower blowing device 180 which filters the air introduced through the lower inlet 114 and discharges the filtered air through the lower outlet 151.

The lower blowing device 180 sends air introduced through a circumferential surface to the lower side. The lower blowing device 180 includes a lower filter 182 which filters the air introduced through the lower inlet 114.

The lower filter 182 has the cylindrical shape. Accordingly, the upper filter 162 filters air which flows from the outer side to the inner side of the circumferential surface.

The lower blowing device 180 includes a lower filter frame 184 which has a space in which the lower filter 182 is disposed. The lower filter frame 184 is disposed below the control box 290 described below.

The lower filter frame 184 is extended below the control box 290. The lower filter frame 184 connects the control box 290, and a lower suction panel 186 to be described below. A plurality of lower filter frames spaced in the circumferential direction may be disposed between the control box 290 and the lower suction panel 186.

The lower blowing device 180 includes a lower suction panel 186 disposed above the lower filter 182 and having a lower orifice 187. The lower suction panel 186 is disposed above the lower filter 182. The lower orifice 187 in which air passing through the lower filter 182 flows is formed at a center of the lower suction panel 186.

The lower blowing device 180 includes a lower fan 188 discharging the air passing through the lower filter 182 through the lower outlet 151 and a lower fan motor 190 rotating the lower fan 188.

The lower fan 188 may be a structure in which the fan suction port is formed at an upper side and the fan discharge port is formed at a lower side. The fan discharge port may be opened to radial outer and lower sides. Air may flow from the upper side of the lower fan 188 to the lower side of the lower fan 188 by rotation of the lower fan 188.

The lower blowing device 180 includes a lower fan housing 192 having a space in which the lower fan 188 is disposed and a discharge passage formed above the lower fan 188.

The lower blowing device 180 includes a lower motor housing 196 which has a space in which the lower fan motor 190 is disposed. A lower guide vane 194 connected to the lower motor housing 196 may be disposed at a lower portion of the lower fan housing 192. The lower guide vane 194 may have a form of being disposed between the lower fan housing 192 and the lower motor housing 196, and extended radially.

The lower guide vane 194 may reduce rotation components of air which flows to the lower side of the lower fan housing 192.

A lower discharge passage 192a is formed between the lower motor housing 196 and the lower fan housing 192. The lower discharge passage 192a may have the annular passage and have a form of being extended to the lower side.

The lower outlet cover 150 may be disposed between the lower motor housing 196 and the lower fan housing 192.

The body 100 includes the control box 290 disposed between the upper blowing device 160 and the lower blowing device 180, and having electronic parts disposed therein. A printed circuit board which operates the upper fan 168 or the lower fan 188 may be disposed inside the control box 290.

An upper pressing plate 292 which is in contact with a lower surface of the upper filter 162 is disposed at an upper portion of the control box 290. The upper pressing plate 292 is disposed in the control box 290 to be movable in upper and lower directions. When the upper filter 162 is disposed above the upper pressing plate 292, the upper pressing plate 292 may move to the lower side.

A lower pressing plate 294 which is in contact with an upper surface of the lower filter 182 is disposed at a lower portion of the control box 290. The lower pressing plate 294 is disposed in the control box 290 to be movable in the upper and lower directions. When the upper filter 182 is disposed below the lower pressing plate 294, the lower pressing plate 294 may move to the upper side.

Whether the upper filter 162 is placed may be determined according to the placement of the upper pressing plate 292. Whether the lower filter 182 is placed may be determined according to the placement of the lower pressing plate 294.

The body 100 includes a base 300 which separates the lower outlet 151 to the upper side from the bottom. The base 300 includes a base plate 302 which is separated to the lower side of the lower outlet 151, and a base support 304 which separates the base plate 302 to the lower side from the lower outlet 151.

The base support 304 is extended to the upper side of the base plate 302. The base support 304 may be coupled to a lower surface of the lower motor housing 196.

Referring to FIG. 4, the booster coupler disposed at the upper portion of the body is described.

The annular upper outlet 134 is formed at the inner side of the upper cover 155. The annular upper outlet 134 is formed between the upper cover 155 and the booster coupler 200.

The upper outlet 134 may mean an area where air flowing by the upper fan 168 is discharged to the outside of the body 100. The upper outlet 134 may be a top area of the upper cover 155. Further, the upper outlet 134 may include an opening area formed on the upper outlet cover 130 disposed at a top portion of the upper cover 155.

The upper outlet cover 130 is fixedly disposed on the top portion of the upper cover 155. The upper outlet cover 130 may be fixed to the upper cover 155 or the booster coupler 200. The upper outlet cover 130 may be fixed to the booster coupler 200 through an outlet cover screw 131.

The booster coupler 200 is disposed at the inner side of the upper cover 155. The booster coupler 200 may be disposed to be spaced apart from the inner side of the upper cover 155.

The booster coupler 200 has a plurality of protrusions protruding in a vertical direction or a horizontal direction so as to be coupled to the booster 500, which are disposed therein. The plurality of respective protrusions may be positioned in different directions, and may protrude in different directions.

The booster coupler 200 includes a vertical protrusion 218 protruding in the upper direction. The booster coupler 200 includes a plurality of horizontal protrusions 232, 234, and 236 protruding in the horizontal direction. The plurality of horizontal protrusions 232, 234, and 236 may be disposed at different positions.

The plurality of horizontal protrusions 232, 234, and 236 include a first horizontal protrusion 232. The plurality of horizontal protrusions 232, 234, and 236 include a pair of second horizontal protrusions 234 disposed to be spaced at both sides based on the first horizontal protrusion 232.

The booster coupler 200 includes a fixation body 210 in which the vertical protrusion 218 is disposed. The booster coupler 200 includes a movable body 230 in which the plurality of horizontal protrusions 232, 234, and 236 are disposed.

The movable body 230 is disposed to move relatively to the fixation body 210. Accordingly, as the movable body 230 moves, the location of each of the plurality of horizontal protrusions 232, 234, and 236 may also be changed. A grip 238 is disposed at one side of the movable body 230 which may be used to change the placement of the movable body 230.

The fixation body 210 includes a fixation protruding portion 216 which protrudes to the upper side so as to maintain the state in which the booster 500 is mounted. Further, the fixation protruding portion 216 includes an additional protruding portion 220 which protrudes additionally in the horizontal direction.

The vertical protrusion 218 may protrude on an upper surface of the fixation protruding portion 216. The first horizontal protrusion 232 may protrude to a front surface of the fixation protruding portion 216. The first horizontal protrusion 232 may protrude to the front of the fixation protruding portion 216 according to the placement of the movable body 230.

The second horizontal protrusion 234 may protrude to a groove formed at the additional protruding portion 220. The second horizontal protrusion 234 may protrude to the front of the additional protruding portion 220 according to the placement of the movable body 230.

The fixation protruding portion 216 may be inserted into the fixation groove 604 of the booster 500. The additional protruding portion 220 may be disposed to be in contact with the additional vertical wall 611a of the booster 500.

The booster coupler 200 includes rotating bodies 250 and 260 to which the fixation body 210 is coupled. The rotating bodies 250 and 260 may rotate in the circumferential direction. The fixation body 210 is fixedly disposed in the rotating bodies 250 and 260. The movable body 230 is disposed between the fixation body 210 and the rotating bodies 250 and 260. The movable body 230 is disposed in the fixation body 210 to move in front and rear directions. A spring for restoring the placement of the movable body 230 may be disposed between the movable body 230 and the fixation body 210.

The booster coupler 200 includes a corresponding terminal 269 connected to the terminal connector 542 of the booster 500. The corresponding terminal 269 may be disposed between a pair of third horizontal protrusion 236.

The corresponding terminal 269 may be disposed on the rotating bodies 250 and 260.

Referring to FIG. 5, components of the upper outlet cover and the booster coupler, and coupling relationships thereof are described.

The upper cover 155 has a cylindrical structure.

The top portion of the upper cover 155 and an outer peripheral end of the upper outlet cover 130 may be disposed to be in contact with each other.

The upper outlet cover 130 includes a plurality of upper outlet grills 132 extended radially. The upper outlet cover 130 includes a plurality of outer cover rims 136 connecting outer peripheral ends of the plurality of upper outer grills 132. The outer covering rim 136 has the ring shape. The outer cover rim 136 may be seated on the upper side of the upper cover 155.

The upper outlet cover 130 includes inner cover rims 138 connecting inner peripheral ends of the plurality of upper outer grills 132. The inner cover rim 138 has a ring shape with a smaller diameter than the outer cover rim 136. A cover hook 142 protruding to the lower side is disposed on the inner cover rim 138.

The upper outlet cover 130 includes a screw coupler 140 on which the outer cover screw 131 is mounted.

The cover hook 142 is mounted on one side of the booster coupler 200. The screw coupler 140 is fixed to one side of the booster coupler 200.

The booster coupler 200 includes a support body 270 having a space in which the rotating bodies 250 and 260 are disposed. The rotating bodies 250 and 260 are rotatably disposed on the support body 270. Bearings 280 are disposed between the rotating bodies 250 and 260, and the support body 270.

The bearing 280 may have a shape in which a center is opened.

Accordingly, an electrical wire on which current flows may be disposed through the center of the bearing 280.

The upper outlet cover 130 is connected to the support body 270. The upper outlet cover 130 is fixedly disposed on the support body 270.

A rack gear 272 is disposed on one side surface of the support body 270.

The rotating bodies 250 and 260 are rotatably disposed at the inner side of the support body 270.

The rotating bodies 250 and 260 have a rotary motor 258 and a rotary gear 259 disposed therein. The rotary gear 259 rotates by the rotary motor 258. The rotary gear 259 is disposed to engage with the rack gear 272.

The rotary motor 258 is fixedly disposed on the rotating bodies 250 and 260. Accordingly, the rotary gear 259 rotates by actuating the rotating bodies 250 and 260, so the rotating bodies 250 and 260 may rotate inside the support body 270.

The corresponding terminal 269 is disposed on the upper surfaces of the rotating bodies 250 and 260. The rotating bodies 250 and 260 may be fastened with the stopper wall 222 inserted into the guide wall insertion groove 266 with a screw. The spring support 264 is disposed on the upper surfaces of the rotating bodies 250 and 260. A spring 263 is disposed between the spring protrusion 268 and the spring support 264 disposed at the inner side of the movable body 230. The spring 263 may restore the placement of the movable body 230.

The rotating bodies 250 and 260 include a lower rotating body 250 inside the support body 270 and an upper rotating body 260 disposed above the lower rotating body 250.

The lower rotating body 250 is disposed above the bearing 280. The rotary motor 258 is fixedly disposed on the lower rotating body 250. The upper rotating body 260 is coupled to the lower rotating body 250. The corresponding terminal 269 is disposed in the upper rotating body 260. The spring support 264 is disposed in the upper rotating body 260.

The body fastening boss 262 is disposed in the upper rotating body 260.

The stopper wall 222 may be disposed to be in contact with the movable body 230. The stopper wall 222 may limit forward movement of the movable body 230. The stopper wall 222 may perform a stopper function of the movable body 230.

Referring to FIG. 6, an appearance of the booster is described.

The booster 500 has a booster inlet 502 formed at one side and a booster outlet 504 formed at the other side. The booster 500 may have a substantially hemispherical shape.

The booster 500 has a booster fan 550 disposed therein. Accordingly, the booster 500 may switch a direction of the air which flows to the upper side through the upper outlet 134 of the body 100.

The booster outlet 504 may be formed in the annular shape. The booster outlet 504 may be formed in a different direction from the booster inlet 502. The booster outlet 504 may be formed in an opposite direction to the booster inlet 502.

The booster 500 includes a front body 510. The front body 510 is disposed at an inner side of the annular booster outlet 504.

The booster 500 includes a rear body 620 having the booster inlet 502. The rear body 620 is disposed in an opposite direction to the front body 510.

The booster 500 includes a circumference body 560 disposed on a circumference of the front body 510.

The circumference body 560 is disposed on the circumference of the front body 510. The booster outlet 504 is formed between the circumference body 560 and the front body 510.

Referring to FIG. 7, a configuration of the booster is described.

The booster 500 includes a booster case having the booster inlet 502 and the booster outlet 504. A booster discharge passage 506 (or ‘discharge passage’) may be disposed inside the booster case. The booster fan 550 may be disposed inside the booster case.

The booster case may include the front body 510, the circumference body 560 disposed on the circumference of the front body 510, and the rear body 620 disposed at an opposite side to the front body 510 based on the circumference body 560.

The booster 500 includes a fan assembly 530 disposed on the rear of the front body 510.

The front body 510 has a space in which a display is disposed therein. A lamp which irradiates light toward the booster discharge passage 506 to be described below may be disposed inside the front body 510.

The front body 510 includes a front wall 512 disposed to be exposed forward.

The front body 510 includes a first inner guide wall 514 extended to the rear from an outer peripheral end of the front wall 512. The first inner guide wall 514 may form the booster discharge passage 506 jointly with a second inner guide wall 572 described below.

A transmission member 518 configured to guide light generated by the lamp to the booster discharge passage 506 may be disposed on a rear surface of the front body 510.

The fan assembly 530 includes a fan housing 532 disposed on the rear of the front body 510. The fan assembly 530 includes a booster fan 550 rotatably disposed inside the fan housing 532. The fan assembly 530 includes a booster fan motor 552 disposed inside the fan housing 532 and rotating the booster fan 550.

The fan housing 532 has a space in which the booster fan 550 is disposed. The fan housing 532 has the housing suction port 532a formed on the rear thereof. A housing discharge port 532b is formed on a circumferential surface of the fan housing 532.

The fan housing 532 is connected to the front body 510 to the front thereof.

The fan housing 532 has the housing suction port 532a formed on the rear thereof. The fan housing 532 has the housing discharge port 532b formed on the circumferential surface thereof.

The fan assembly 530 includes a locking jaw 540 protruding to the rear to be connected to the circumference body 560. The locking jaw 540 is disposed on the rear of the fan housing 532. The locking jaw 540 has a structure of protruding to the rear on the rear surface of the fan housing 532. The locking jaw 540 has a structure of protruding to the rear on the rear surface of the fan housing 532 and being bent to the upper side.

The fan assembly 530 includes a terminal connector 542 disposed to penetrate the circumference body 560 and electrically connected to the body 100. The terminal connector 542 is disposed on the rear of the fan housing 532.

The terminal connector 542 is disposed in a different direction from the locking jaw 540. The terminal connector 542 is disposed to be spaced apart from the locking jaw 540.

The fan assembly 530 includes a fastening boss 544 penetrating the circumference body 560 and coupled to the rear body 620. The fastening boss 544 is fastened to the rear body 620 through a separate fastening member.

The fan assembly 530 includes a guide post 546 which is inserted into a guide hole 586 formed in the circumference body 560. The guide post 546 is extended in line with the fastening boss 544. The guide post 546 protrudes to the rear on the rear surface of the fan housing 532.

Each of the locking jaw 540 and the terminal connector 542 of the fan assembly 530 is locked to the circumference body 560, so the front body 510 and the circumference body 560 may be coupled to each other. That is, when the locking jaw 540 and the terminal connector 542 are separated from the circumference body 560, the fan assembly 530 and the circumference body 560 may be separated from each other.

The fastening boss 544 has a structure of protruding to the rear on the rear surface of the fan housing 532. The front body 510 includes a pair of fastening bosses 544 disposed to be spaced apart from each other.

The circumference body 560 is disposed on the circumference of the fan housing 532. The circumference body 560 is disposed to be spaced apart from the circumferential surface of the fan housing 532.

The circumference body 560 may include a circumference wall 570 disposed on the circumference of the fan housing 532.

The circumference body 560 may have a locking groove 582 in which the locking jaw 540 is disposed on the rear.

The circumference body 560 may have a connection hole 584 formed to be penetrated by the terminal connector 542 on the rear. The connection hole 584 may be opened in a direction in which the terminal connector 542 is extended.

The circumference body 560 may include the rear wall 580 extended to the inner side on the rear of the circumferential wall 570. The rear wall 580 may be formed in a ring shape.

The locking groove 582 may be formed on the rear wall 580. The connection hole 584 may be formed on the rear wall 580.

A mounting groove 588 on which the rear body 620 is mounted is formed on the rear wall 580. A rear body hook 624 formed in the rear body 620 may be inserted into the mounting groove 588.

A booster connector 600 mounted on the booster coupler 200 of the body 100 is disposed on the rear wall 580. The booster connector 600 may be disposed at an inner side of the rear wall 580.

A bridge 590 may be disposed on the rear wall 580, which connects one side of the rear wall 580 and one side of the booster connector 600. The circumference body 560 may include a pair of bridges 590 connecting the rear wall 560 and the booster connector 600.

A pair of bridges 590 may be each disposed so that a separation distance therebetween is increased toward the rear wall 580 from the booster connector 600.

A penetration hole 589 penetrated by the fastening boss 544 is formed on the rear wall 580. The guide hole 586 into which the guide post 546 is inserted is formed on the rear wall 580.

The rear body 620 is disposed in the rear of the circumference body 560. The rear body 620 is separated to the rear of the circumference body 560.

The rear body 620 may have a shape of being convex to the rear. The booster inlet 502 is formed in the booster 620. The rear body 620 may have an opening 622 at the area where the booster connector 600 is disposed.

A plurality of booster inlets 502 may be formed in the rear body 620. The plurality of booster inlets 502 may be disposed to be spaced in the circumferential direction. The plurality of booster inlets 502 may be formed radially.

The rear body 620 may include a rear body hook 624 protruding to the front to be coupled to the circumference body 560. The rear body hook 624 may be inserted into the mounting groove 588 formed in the circumference body 560.

Referring to FIG. 8, an internal configuration of the booster is described.

The front body 510 is disposed to face a direction in which the booster outlet 504 is opened. The front wall 512 of the front body 510 may have a flat surface. The front wall 512 may form the display.

The printed circuit board may be disposed inside the front body 510. A plurality of lamps 520 may be disposed inside the front body 510. A transmission member 518 which guides light generated by the lamp 520 to the booster discharge passage 506 may be disposed on the rear of the front body 510.

The fan assembly 530 is disposed on the rear of the front body 510. The fan assembly 530 may have a structure of being fastened to the rear of the front body 510.

The front body 510 includes the first inner guide wall 514 on the circumferential surface thereof. The first inner guide wall 514 may have a shape in which a diameter becomes larger toward the front wall on the rear of the front body 510.

The booster fan 550 may adopt a mixed flow fan. The booster fan 550 may have a structure in which the fan suction port is formed in a direction in which a rotary axis is extended and the fan discharge port is formed in a centrifugal direction.

Accordingly, air which flows in a direction in which the rear body 620 is disposed may be discharged in the centrifugal direction. The booster fan motor 552 rotating the booster fan 550 may be disposed between the booster fan 550 and the front body 510.

The fan housing 532 may have a space in which the booster fan 550 rotates. The fan housing 532 may have a housing suction port 532a formed in a direction in which the fan suction port of the booster fan 550 is formed. The fan housing 532 may have the housing discharge port 532b formed on a circumference wall in which the fan discharge port is formed.

Accordingly, air is introduced on the rear by the rotation of the booster fan 550, and air is discharged in a circumferential direction of the booster fan 550.

The circumference body 560 is disposed on the circumference of the fan assembly 530 and the front body 510. The circumference body 560 includes an outer wall 574 disposed at an outer side of the circumference of the booster 500. The circumference body 560 includes the second inner guide wall 572 which guides the air discharged through the housing discharge port 532b of the fan housing 532 to the booster outlet 504.

The second guide wall 572 is disposed to be spaced apart from the first inner guide wall 514. The second guide wall 572 is disposed to be spaced apart from the circumference of the fan housing 532. The second inner guide wall 572 may form the booster discharge passage 506 jointly with the first inner guide wall 514.

The booster discharge passage 506 may have a shape of being bent to the front. The booster discharge passage 506 may have a shape in which a cross-section of the passage is reduced toward the booster outlet 504 from the housing discharge port 532b.

The booster outlet 504 may guide the air discharged in the centrifugal direction from the fan housing 532 in a vertical direction.

The locking jaw 540 disposed in the fan housing 532 is disposed to be inserted into the locking groove 582 formed in the circumference body 560. The locking jaw 540 is disposed to penetrate the locking groove 582, and disposed to be in contact with the rear wall of the circumference body 560.

The terminal connector 542 disposed in the fan housing 532 is disposed to penetrate the connection hole 584.

The terminal connector 542 disposed in the fan housing 532 and the booster connector 600 disposed in the circumference body 560 are disposed at the opening 622 of the rear body 620. Accordingly, the terminal connector 542 and the booster connector 600 are disposed to be exposed to the outside even in a state in which the rear body 620 is disposed at one side of the circumference body 560.

The rear body 620 may form a continuous surface jointly with the outer wall 574 of the circumference body 560. Accordingly, some of the air discharged from the body 100 may flow along the rear body 620, and the outer wall 574 of the circumference body 560.

The booster outlet 504 formed in the rear body 620 is extended radially. Accordingly, a surface on which the booster outlet 504 is not formed may form a continuous surface toward the circumference body 560.

Hereinafter, referring to FIGS. 9 and 10, the rear body will be described.

The rear body 620 may have a shape of being convex to the rear. The rear body 620 may have the opening 622 formed at the lower side thereof. A plurality of booster inlets 502 are formed in the rear body 620.

The booster inlet 502 may be formed radially in an area in which the opening 622 is not formed. An inner surface of the rear body 620 includes a connection protruding portion 628 connected to the fastening boss 544 of the fan housing 532. The connection protruding portion 628 protrudes toward the fan housing 532 on the inner surface of the rear body 620.

The connection protruding portion 628 and the fastening boss 544 may be coupled to each other through a separate fastening screw.

A plurality of contact ribs 630 may protrude on an inner surface of the rear body 620. The contact rib 630 may be disposed to be in contact with a rear of the circumference body 560 when the rear body 620 is disposed in the rear of the circumference body 560.

The contact rib 630 may be disposed to be in contact with a locking jaw 540 of the fan housing 532 when the rear body 620 is disposed in the rear of the circumference body 560.

The contact rib 630 may maintain a distance at which the rear body 620 is disposed in the rear of the circumference body 560.

A rear body hook 624 is disposed on the inner surface of the rear body 620. A plurality of rear body hooks 624 may be disposed on an outer peripheral end of the inner surface of the rear body 620. The plurality of rear body hooks 624 may be disposed to be spaced apart from each other in a circumferential direction. A rear body rim 626 is disposed on an outer circumference of the rear body 620. The rear body rim 626 protrudes toward the circumference body 560 on the inner surface of the rear body 620.

Referring to FIGS. 11 and 12, an appearance of the circumference body of the present disclosure is described.

A flow hole 560a opened to make air introduced through the booster inlet 502 flow to an area where the fan housing 532 is disposed is formed in the circumference body 560.

The circumference body 560 includes the outer wall 574 disposed at the area exposed to the outside. The circumference body 560 may include the rear wall 580 extended to the inner side on the rear of the outer wall 574.

A mounting groove 588 into which the rear body hook 624 of the rear body 620 is inserted is formed on the rear wall 580.

A penetration hole 589 penetrated by the fastening boss 544 of the fan housing 532 is formed on the rear wall 580. The guide hole 586 into which the guide post 546 is inserted is formed on the rear wall 580.

The locking groove 582 into which the locking jaw 540 of the fan housing 532 is inserted is formed at an upper portion of the rear wall 580. The connection hole 584 into which the terminal connector 542 is inserted is formed at a lower portion of the rear wall 580. The booster connector 600 is disposed on the rear wall 580.

The booster connector 600 may have a shape of protruding to the upper side at the lower portion of the rear wall 580. A plurality of horizontal holes 612, 614, and 616, and a vertical hole 608 may be formed in the booster connector 600 to be coupled to the booster coupler 200.

The booster connector 600 includes a fixation wall 618 which fixes the placement of the booster 500 while being mounted on the booster coupler 200. While the booster connector 600 is mounted on the booster coupler 200, the fixation wall 618 may be disposed to be in contact with an outer circumference of the booster coupler 200.

The booster connector 600 includes an extension wall 602 disposed in line with the rear wall 580 and extended to the upper side at the lower portion of the rear wall 580. The fixation wall 618 has a structure of protruding to the rear on an upper end and both side ends of the extension wall 602.

A partial surface of the booster coupler 200 may be disposed to be in contact with the extension wall 602 and the fixation wall 618.

The fixation groove 604 having a groove on the front is formed on the extension wall 602 of the booster connector 600. A partial configuration of the booster coupler 200 may be inserted into the fixation groove 604.

The booster connector 600 includes a vertical wall 610 which forms a vertical surface to the ground so that the fixation groove 604 is formed on the extension wall 602. The booster connector 600 includes a horizontal wall 606 which forms a horizontal surface to the ground so that the fixation groove 604 is formed on the extension wall 602. The horizontal wall 606 is disposed at an upper end of the vertical wall 610.

One or more horizontal holes 612, 614, and 616 are formed on the vertical wall 610.

The booster connector 600 includes an additional vertical wall 611a having a surface which is in line with the vertical wall 610, and spaced to the front of the vertical wall 610. As the additional vertical wall 611a is spaced to the front of the vertical wall 610, an additional fixation groove may be formed at an area which forms the additional vertical wall 611a.

A first horizontal hole 612 may be formed on the vertical wall 610. A pair of additional vertical walls 611a may be provided, which are disposed in left and right directions based on the first horizontal hole 612. A second horizontal hole 614 is formed on each of a pair of additional vertical walls 611a.

The first horizontal hole 612 may be disposed between a pair of second horizontal holes 614. An area of the first horizontal hole 612 may be formed to be larger than an area of each of a pair of second horizontal holes 614.

A third horizontal hole 616 may be formed on the rear wall 580. An auxiliary vertical wall 611b may be formed in the area of the rear wall 580 in which the third horizontal hole 616 is formed. The auxiliary vertical wall 611b may have a surface which is in line with the vertical wall 610.

A pair of auxiliary vertical walls 611b in which the third horizontal hole 616 is formed may be disposed on the rear wall 580. A pair of auxiliary vertical walls 611b are disposed below the vertical wall 610. The pair of auxiliary vertical walls 611b are disposed in the front of a pair of additional vertical walls 611a.

A distance at which the pair of auxiliary vertical walls 611b are spaced apart from each other is formed to be larger than the distance at which the pair of additional vertical walls 611a are spaced apart from each other.

A pair of third horizontal holes 616 are disposed below the pair of second horizontal holes 614. A distance at which the pair of third horizontal holes 616 are spaced apart from each other is formed to be larger than the distance at which the pair of second horizontal holes 614 are spaced apart from each other.

The connection hole 584 penetrated by the terminal connector 542 is disposed between the pair of third horizontal holes 616.

The circumference body 560 includes a bridge 590 that connects the booster connector 600 and the rear wall 580. The bridge 590 may connect an upper portion of the booster connector 600 and an upper portion of the rear wall 580. The circumference body 560 includes a pair of bridges 590.

The pair of bridges 590 connect an upper end of the booster connector 600 and the rear wall 580. The pair of bridges 590 is extended to the upper side in the booster connector 600. The pair of bridges 590 may be formed so that a distance at which the pair of bridges 590 are spaced apart from each other toward the upper side in the booster connector 600 increases.

Referring to FIG. 13, the circumference body is described.

The circumference body 560 may include the outer wall 574, and a second inner guide wall 572 disposed at an inner side of the outer wall 574. A curvature radius of a surface forming the outer wall 574 may be formed to be larger than a surface forming the second inner guide wall 572.

A distance at which the outer wall 574 and the second inner guide wall 572 are spaced apart from each other may be formed to decrease toward the front on the rear wall 580.

The second inner guide wall 572 is disposed to be spaced apart from the outer wall 574.

The vertical wall 610 may be disposed to be inclined on the extension wall 602. The booster 500 may be disposed to be inclined in the body 100 as large as an inclination formed between the vertical wall 610 and the extension wall 602.

A first horizontal hole 612 may be formed on the vertical wall 610. The vertical hole 608 may be formed on the horizontal wall 606.

The circumference body 560 may include an outer circumference body 566 including the outer wall 574, and an inner circumference body 562 including the second inner guide wall 572. The inner circumference body 562 may be disposed to be fixed to an inner side of the outer circumference body 566.

A front end of the inner circumference body 562 may have to a bent shape to cover a front end of the outer circumference body 566.

Referring to FIG. 14, the inner circumference body and the outer circumference body are described.

The inner circumference body 562 and the outer circumference body 566 may be separated from each other.

The inner circumference body 562 may include the second inner guide wall 572. The inner circumference body 562 may include an inner rim 564 which protrudes to the rear on an inner peripheral end of the second inner guide wall 572. The inner rim 564 may be in contact with one side of the outer circumference body 566.

The inner circumference body 562 may include an outer rim 568 which protrudes to the rear on an outer peripheral end of the second inner guide wall 572. Referring to FIG. 11, the outer rim 568 may have a substantially ‘c’ shape. The outer rim 568 may have a structure of covering an outer peripheral end of the outer circumference body 566.

A fastening protrusion 565 which protrudes to be fastened to the outer circumference body 566 may be disposed on the second inner guide wall 572 of the inner circumference body 562. The fastening protrusion 565 may have a structure of protruding to the rear on a rear surface of the second inner guide wall 572. The fastening protrusion 565 may be formed in a hook shape.

A plurality of fastening protrusion 565 may be disposed on the rear surface of the second inner guide wall 572. The plurality of fastening protrusions 565 may be disposed to be spaced apart from each other in the circumferential direction on the rear surface of the second inner guide wall 572.

The outer circumference body 566 is disposed at an outer side of the inner circumference body 562. Fastening grooves 569 opened to insert the plurality of fastening protrusions 565 are formed on the rear wall 580 of the outer circumference body 566. A plurality of fastening grooves 569 spaced apart from each other in the circumferential direction are formed on the rear wall 580.

Referring to FIG. 15, the front body and the fan assembly are described. The fan assembly 530 is disposed on the rear of the front body 510. The fan assembly 530 may have a structure of being coupled to the front body 510. The fan assembly 530 may be coupled to the front body 510 through a separate fastening screw.

The front body 510 includes a front wall 512 facing the front and exposed to the outside. The front wall 512 may be used as a display.

The front body 510 includes a first inner guide wall 514 extended to the rear. The first inner guide wall 514 may have a shape of a curved surface. A transmission member 518 may be disposed on a rear of the first inner guide wall 514.

The transmission member 518 may guide light to the booster discharge passage 506.

The fan assembly 530 is disposed on the rear of the first inner guide wall 514.

The fan assembly 530 includes a fan housing 532, and a booster fan 550 disposed at an inner side of the fan housing 532.

The fan housing 532 may be formed in a substantially cylindrical shape. The fan housing 532 may have a housing discharge port 532b formed on a circumference surface thereof and a housing suction port 532a formed on a rear surface thereof.

The fan housing 532 includes a housing wall 534 having the housing discharge port 532b. The housing wall 534 may have a space having a cylindrical shape, and including the booster fan 550 disposed therein.

The fan housing 532 includes an outer flange 536 which protrudes to an outer side in a radial direction on a front of the housing wall 534. The outer flange 536 may be fastened to the front body 510. The outer flange 536 is fastened to the front body 510 through a separate fastening screw.

The fan housing 532 includes an inner flange 538 which protrudes to an inner side in the radial direction on a rear of the housing wall 538. The housing suction port 532a is formed at an inner side of the inner flange 538.

The fastening boss 544 may be disposed in the inner flange 538. The fastening boss 544 protrudes to a rear in the inner flange 538.

The guide post 546 may be disposed in the inner flange 538. The guide post 546 protrudes to the rear in the inner flange 538.

The locking jaw 540 which protrudes to the rear and the upper side is disposed in the rear of the fan housing 532. The locking jaw 540 may have a structure of being extended to the rear and bent to the upper side.

The terminal connector 542 electrically connected to the body 100 is disposed in the rear of the fan housing 532.

A connector cover which guides the terminal connector 542 to be coupled to the corresponding terminal 269 may be disposed on a circumference of the terminal connector 542. The connector cover 543 may be extended in a vertical direction to the ground. The connector cover 543 may form a surface which is in line with the vertical wall 610 of the circumference body 560.

Referring to FIG. 16, the front body and the fan assembly are described.

In the fan housing 532, the housing suction port 532a is formed in a direction in which a rotary axis of the booster fan 550 is extended, and the housing discharge port 532b is formed in a centrifugal direction of the booster fan 550.

In the fan housing 532, the locking jaw 540 is disposed at one side and the terminal connector 542 is disposed in an opposite direction in which the locking jaw 540 is disposed. The connector cover 543 is disposed on the circumference of the terminal connector 542.

A motor cover 554 is disposed in the rear of the front body 510. The motor cover 554 fixes the booster fan motor 552 connected to the booster fan 550.

The fan assembly 530 includes the motor cover 554 disposed between the booster fan 550 and the booster fan motor 552. The motor cover 554 is disposed between the booster fan 550 and the front body 510. The motor cover 554 may be disposed to cover the rear of the front body 510.

The motor cover 554 may have a bowl shape to be disposed on the circumference of the booster fan motor 552 at a central area. Further, the motor cover 554 may have a plate shape extended in the radial direction on a bowl-shaped circumference.

The motor cover 554 may be coupled to the fan housing 532 at one side in a hook scheme and fastened to the fan housing 532 at the other side through a separate fastening screw. A motor cover hook 556 disposed at one side of the motor cover 554 is inserted into one side of the fan housing 532. Further, the motor cover 554 may be fastened to the outer flange 536 of the fan housing 532 through a separate fastening screw (see FIG. 15).

The transmission member 518 may be disposed in the front of the motor cover 554. The motor cover 554 and the transmission member 518 may be coupled to each other in a combined by a fusion scheme. The motor cover 554 and the transmission member 518 may be coupled to each other through a separate fastening means (not illustrated).

A printed circuit board 516 may be disposed at the inner side of the front body 510. A lamp 520 which generates light may be disposed in the printed circuit board 516. The light generated by the lamp 520 may be irradiated to the booster discharge passage 506 through the transmission member 518.

FIG. 17 is an enlarged diagram of enlarging a part of FIG. 16. Referring to FIG. 17, placements of the printed circuit board, the lamp, and the transmission member are described.

The lamp 520 may be disposed at one side of the printed circuit board 516. A plurality of lamps 520 which are spaced apart from each other in the circumferential direction may be disposed at an upper side of the printed circuit board 516.

The lamp 520 may be disposed to emit light in an opposite direction in which the printed circuit board 516 is disposed.

The transmission member 518 may be formed substantially in a form of a ring disk. The transmission member 518 may be formed in the form of the ring disk in which a hole is formed at a center.

Referring to the figure, the lamp 520 according to a first embodiment is disposed to emit light in an opposite direction to the printed circuit board 516. Further, one end portion of the transmission member 518 disposed adjacent to the lamp 520 has a structure of being extended to an outer side in a radial direction by passing through a bent area.

The transmission member 518 may have a groove 518a recessed to an inner side of the transmission member 518, which is formed on one end surface facing the lamp 520.

The transmission member 518 may be disposed between the motor cover 554 and the front wall 512. The transmission member 518 may be disposed between the motor cover 554 and the first inner guide wall 514.

FIG. 18 is a rear surface view of the booster for describing placements and forms of the lamp and the transmission member disposed in the rear of the front body according to a second embodiment of the present disclosure. FIG. 19 is an enlarged diagram of A in FIG. 18.

Referring to FIGS. 18 and 19, the placement of the lamp and the form of the transmission member according to the second embodiment are described.

The booster 500 includes a front wall 512 (see FIG. 20) disposed to be exposed to the front, and a first inner guide wall 514 extended to the rear from an outer peripheral end of the front wall 512.

The front wall 512 may form a flat surface. The first inner guide wall 514 is disposed in the rear of the front wall 512. The first inner guide wall 514 may be formed in a ring shape.

The booster includes the printed circuit board 516 disposed in the rear of the front wall 512. The printed circuit board 516 is disposed at an inner side of the first inner guide wall 514.

The booster 500 includes the lamp 520 disposed on one side surface of the printed circuit board 516 and emitting light.

The booster 500 includes the lamp 520 disposed on one side surface of the printed circuit board 516 and emitting light.

The lamp 520 is disposed for a light emitting surface 520a emitting light to face the outer side in the radial direction. The light emitting surface 520a of the lamp 520 is formed to be vertical to a surface on which the lamp 520 is mounted in the printed circuit board 516.

The booster 500 includes a transmission member 518 which sends light generated by the lamp 520 to the booster discharge passage 506. The transmission member 518 may have a disk plate structure in which a hole is formed at a center.

An inner surface of the transmission member 518 may be formed in a circular shape. An inner circumferential surface 518b of the transmission member 518 may be disposed to face the lamp 520.

The inner circumferential surface of the transmission member 518 includes a curved surface area 519c forming a smooth curved surface and a bent surface area 519c forming a bend.

Referring to FIG. 19, the bent surface area 519c includes a first bent surface 519a facing the light emitting surface 520a of the lamp 520, and second bent surfaces 519b disposed at both sides of the first bent surface 519a.

The first bent surface 519a includes a plurality of first ridges 519a1 which protrude in a central direction of the transmission member 518, and a plurality of first grooves 519a2 which are disposed between the plurality of first ridges 519a1, and spaced apart from a center further than the first ridge 519a1.

Here, the central direction of the transmission member 518 may be a direction faced by the inner circumferential surface of the transmission member 518.

The first bent surface 519a includes a plurality of first ridges 519a1 which protrude in a direction in which the lamp 520 is disposed, and a plurality of first grooves 519a2 which are disposed between the plurality of first ridges 519a1, and spaced apart from the lamp 520 further than the first ridge 519a1.

The plurality of first grooves 519a2 may be disposed for the light generated by the light emitting surface 520a of the lamp 520 to be incident. Referring to FIG. 19, each of the plurality of first grooves 519a2 is disposed to face the light emitting surface 520a of the lamp 520. Accordingly, the light generated from the light emitting surface 520a may be incident on the transmission member 518 through each of the plurality of first grooves 519a2.

The light generated by the lamp 520 and incident on the transmission member 518 The plurality of first grooves 519a2 may spread widely due to an inclination surface formed by each of the plurality of first grooves 519a2.

The second bent surface 519b includes a plurality of second ridges 519b1 which protrude in the central direction of the transmission member 518, and a plurality of second grooves 519b2 which are disposed between the plurality of second ridges 519b1, and spaced apart from an outer side in the radial direction further than the second ridge 519b1.

A height difference H1 spaced in the radial direction between the first ridge 519a1 and the first groove 519a2 may be formed to be longer than a height difference H2 spaced in the radial direction between the second ridge 519b1 and the second groove 519b2.

FIG. 20 is a one-side cross-sectional view for describing placements and forms of the printed circuit board, the lamp, and the transmission member disposed inside the front body according to the second embodiment of the present disclosure. FIG. 21 is an enlarged diagram of enlarging a part of FIG. 20.

Referring to FIGS. 20 and 21, a placement relationship between the transmission member and the lamp is described.

The printed circuit board 516 is disposed in the rear of the front wall 512. The printed circuit board 516 is disposed at an inner side of the first inner guide wall 514.

The lamp 520 is disposed on a rear surface of the printed circuit board 516. The light emitting surface 520a of the lamp 520 is disposed to face the outer side in the radial direction. The light emitting surface 520a of the lamp 520 is disposed to face the inner circumferential surface 518b of the transmission member 518.

The transmission member 518 includes a circular inner circumferential surface 518b. The transmission member 518 may have a ring shape of being extended to the outside in the radial direction from the inner circumferential surface 518b.

The inner circumferential surface 518b of the transmission member 518 may form an incident surface on which the light emitted by the lamp 520 is incident.

The transmission member 518 is extended to the outer side in the radial direction. When the transmission member 518 is extended to the outer side in the radial direction, the transmission member 518 may form an inclination surface in upper and lower directions within an acute angle range. Alternatively, the transmission member 518 may be flatly extended to the outer side in the radial direction.

An outer circumferential surface 518c of the transmission member 518 is disposed to face the booster discharge passage 506. The outer circumferential surface 518c of the transmission member 518 may be an emission surface through which light is discharged to the outside of the transmission member 518. The outer circumferential surface 518c of the transmission member 518 is disposed to face the second inner guide wall 572. Accordingly, the light discharged through the outer circumferential surface 518c of the transmission member 518 may be irradiated to the second inner guide wall 572.

The transmission member 518 is disposed in the rear of the first inner guide wall 514. The outer circumferential surface 518c of the transmission member 518 is disposed to be spaced apart to the inner side further than the first inner guide wall 514. Accordingly, the light discharged through the outer circumferential surface 518c of the transmission member 518 may be prevented from being directly irradiated to the booster outlet 504.

While the embodiments of the present disclosure have been illustrated and described above, the present disclosure is not limited to the aforementioned specific embodiments, various modifications may be made by a person with ordinary skill in the technical field to which the present disclosure pertains without departing from the subject matters of the present disclosure that are claimed in the claims, and these modifications should not be appreciated individually from the technical spirit or prospect of the present disclosure.