Patent application title:

INVERTED-T-SHAPED SPLIT-TYPE RANGE HOOD

Publication number:

US20260063308A1

Publication date:
Application number:

19/239,863

Filed date:

2025-06-16

Smart Summary: The range hood has a unique inverted-T shape and is designed to remove smoke and odors from the kitchen. It consists of a main body with an air inlet and a smoke collecting box that covers this inlet. The smoke collecting box has an outlet that connects to the air inlet, allowing for efficient airflow. An exhaust motor sits above the main body, separated from the smoke collecting box by a specific distance. This motor helps to pull air through the system, ensuring that the kitchen stays fresh and clean while cooking. 🚀 TL;DR

Abstract:

An inverted-T-shaped split-type range hood includes a range hood body, an exhaust motor, an air guide cylinder, and an outer cover shell. The range hood body includes a casing and a smoke collecting box. The casing has an air inlet, the smoke collecting box is disposed on the casing, and the smoke collecting box covers the air inlet. The smoke collecting box has an air outlet, and the air outlet of the smoke collecting box is spatially connected to the air inlet of the casing. The exhaust motor is located in a space above the range hood body and spaced apart from the smoke collecting box by a predetermined distance. The exhaust motor includes an outer shell and a motor body, and the outer shell has an upper opening and a lower opening formed opposite to each other. The motor body is disposed in the outer shell.

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Classification:

F24C15/2071 »  CPC main

Details; Removing cooking fumes mounting of cooking hood

F24C15/20 IPC

Details Removing cooking fumes

Description

CROSS-REFERENCE TO RELATED PATENT APPLICATION

This application claims the benefit of priority to Taiwan Patent Application No. 113133008, filed on Sep. 2, 2024. The entire content of the above identified application is incorporated herein by reference.

Some references, which may include patents, patent applications and various publications, may be cited and discussed in the description of this disclosure. The citation and/or discussion of such references is provided merely to clarify the description of the present disclosure and is not an admission that any such reference is “prior art” to the disclosure described herein. All references cited and discussed in this specification are incorporated herein by reference in their entireties and to the same extent as if each reference was individually incorporated by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to a range hood, and more particularly to an improved inverted-T-shaped split-type range hood.

BACKGROUND OF THE DISCLOSURE

With the continuous improvement of living standards, an integrated inverted-T-shaped range hood is becoming more and more popular among people who pay attention to interior design due to having a small size, pleasing appearance, and aesthetic design. However, an exhaust motor of an existing inverted-T-shaped integrated range hood is installed in a smoke collecting box of a range hood body, and resonates with the smoke collecting box and the range hood body during use, thereby generating huge noise which takes away from the user experience. If the range hood body and the exhaust motor are designed to be split, that is, the exhaust motor is installed in a space such as a balcony outside the kitchen, and connected to the range hood body through a pipe, this noise can be reduced. However, with the number of smaller living spaces being on the rise, there is often no balcony or other space outside the kitchen to install the exhaust motor, such that kitchens of these smaller living spaces cannot enjoy the quiet effect provided by such split-type range hoods.

SUMMARY OF THE DISCLOSURE

In response to the above-referenced technical inadequacies, the present disclosure provides an improved inverted-T-shaped split-type range hood.

In order to solve the above-mentioned problems, one of the technical aspects adopted by the present disclosure is to provide an improved inverted-T-shaped split-type range hood. The improved inverted-T-shaped split-type range hood includes a range hood body, an exhaust motor, an air guide cylinder, and an outer cover shell. The range hood body includes a casing and a smoke collecting box. The casing has an air inlet, the smoke collecting box is disposed on the casing, and the smoke collecting box covers the air inlet. The smoke collecting box has an air outlet, and the air outlet of the smoke collecting box is spatially connected to the air inlet of the casing. The exhaust motor is located in a space above the range hood body and spaced apart from the smoke collecting box by a predetermined distance. The exhaust motor includes an outer shell and a motor body, and the outer shell has an upper opening and a lower opening formed opposite to each other. The motor body is disposed in the outer shell, and one end of the motor body has an exhaust port corresponding to the upper opening. The air guide cylinder is in a vertical arrangement and located between the smoke collecting box of the range hood body and the outer shell of the exhaust motor. A height of the air guide cylinder is equal to the predetermined distance, a lower end of the air guide cylinder is spatially connected to the air outlet of the smoke collecting box of the range hood body, and an upper end of the air guide cylinder is spatially connected to the lower opening of the outer shell of the exhaust motor. The outer cover shell is perpendicularly arranged relative to the range hood body and covers the smoke collecting box, the air guide cylinder, and the exhaust motor.

In one of the possible or preferred embodiments, the air guide cylinder has a cylindrical portion in a vertical arrangement, a first sleeve portion integrally connected to an upper end of the cylindrical portion, and a second sleeve portion integrally connected to a lower end of the cylindrical portion. The outer shell has a lower flange located on the periphery of the lower opening, the lower flange protrudes downward from the outer shell, and the first sleeve portion is sleeved on the lower flange. The smoke collecting box has an upper flange located on a periphery of the air outlet, the upper flange protrudes upward from the smoke collecting box, and the second sleeve portion is sleeved on the upper flange.

In one of the possible or preferred embodiments, the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is a ground inner circumferential wall formed by grinding.

In one of the possible or preferred embodiments, the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is a polished inner circumferential wall formed by polishing.

In one of the possible or preferred embodiments, the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is an inner circumferential wall having a surface coating formed by surface coating.

In one of the possible or preferred embodiments, the smoke collecting box includes an outer box wall, a flow guide shell, and a cover plate. The outer box wall is fixed at a periphery of the air inlet, the flow guide shell is disposed inside the outer box wall, and the cover plate is fixedly connected to a top portion of the outer box wall.

In one of the possible or preferred embodiments, the outer shell has a front wall and a rear wall disposed opposite to each other, and an upper wall-hanging bracket and a lower wall-hanging bracket disposed opposite to each other in a top-down arrangement are mounted on the rear wall, so that the exhaust motor can be mounted on a wall of a kitchen through the upper wall-hanging bracket and the lower wall-hanging bracket disposed opposite to each other in a top-down arrangement and be hidden in the outer cover shell.

In one of the possible or preferred embodiments, the upper wall-hanging bracket has an upper mounting piece, an upper connecting piece, and an upper wall-hanging piece, and the upper connecting piece is connected between the upper mounting piece and the upper wall-hanging piece. The lower wall-hanging bracket has a lower mounting piece, a lower connecting piece, and a lower wall-hanging piece, and the lower connecting plate is connected between the lower mounting piece and the lower wall-hanging piece.

In one of the possible or preferred embodiments, the upper connecting piece of the upper wall-hanging bracket is perpendicular to the upper mounting piece and perpendicular to the upper wall-hanging piece, and the upper mounting piece and the upper wall-hanging piece are respectively connected to two sides of the upper connecting piece and extend in opposite directions. The lower connecting piece of the lower wall-hanging bracket is perpendicular to the lower mounting piece and perpendicular to the lower wall-hanging piece, and the lower mounting piece and the lower wall-hanging piece are respectively connected to two sides of the lower connecting piece and extend in opposite directions.

In one of the possible or preferred embodiments, a wiring space for wiring to pass through is defined between the upper connecting piece of the upper wall-hanging bracket and the lower connecting piece of the lower wall-hanging bracket.

These and other aspects of the present disclosure will become apparent from the following description of the embodiment taken in conjunction with the following drawings and their captions, although variations and modifications therein may be affected without departing from the spirit and scope of the novel concepts of the disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The described embodiments may be better understood by reference to the following description and the accompanying drawings, in which:

FIG. 1 is a schematic view of an improved inverted-T-shaped split-type range hood according to the present disclosure;

FIG. 2 is a perspective schematic view of the improved inverted-T-shaped split-type range hood of the present disclosure;

FIG. 3 is a schematic planar view of the improved inverted-T-shaped split-type range hood of the present disclosure;

FIG. 4 is a perspective exploded schematic view of the improved inverted-T-shaped split-type range hood of the present disclosure;

FIG. 5 is a perspective exploded schematic view of a smoke collecting box of a range hood body of the present disclosure; and

FIG. 6 is a perspective schematic view of an exhaust motor of the present disclosure.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Like numbers in the drawings indicate like components throughout the views. As used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the meaning of “a,” “an” and “the” includes plural reference, and the meaning of “in” includes “in” and “on.” Titles or subtitles can be used herein for the convenience of a reader, which shall have no influence on the scope of the present disclosure.

The terms used herein generally have their ordinary meanings in the art. In the case of conflict, the present document, including any definitions given herein, will prevail. The same thing can be expressed in more than one way. Alternative language and synonyms can be used for any term(s) discussed herein, and no special significance is to be placed upon whether a term is elaborated or discussed herein. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms is illustrative only, and in no way limits the scope and meaning of the present disclosure or of any exemplified term. Likewise, the present disclosure is not limited to various embodiments given herein. Numbering terms such as “first,” “second” or “third” can be used to describe various components, signals or the like, which are for distinguishing one component/signal from another one only, and are not intended to, nor should be construed to impose any substantive limitations on the components, signals or the like.

Referring to FIG. 1 to FIG. 6, the present disclosure provides an improved inverted-T-shaped split range hood that essentially includes a range hood body 1, an exhaust motor 2, an air guide cylinder 3, and an outer cover shell 4.

The range hood body 1 includes a casing 11 and a smoke collecting box 12. In the present embodiment, the casing 11 is substantially an elongated housing having an air inlet 110, and the air inlet 110 is an air inlet for cooking fumes to enter the range hood. The casing 11 may include a cooking fume filter 13 or a guide plate at the air inlet 110 according to practical requirements, but is not limited thereto. The air inlet 110 of the present embodiment may be in a square shape, but the shape of the air inlet 110 is not limited herein. The smoke collecting box 12 is disposed on the casing 11 and covers the air inlet 110. The smoke collecting box 12 has an air outlet 120, the air outlet 120 may be a circular opening, and the air outlet 120 of the smoke collecting box 12 is spatially connected to the air inlet 110 of the casing 11.

The exhaust motor 2 is located in a space directly above the range hood body 1 and is spaced apart from the smoke collecting box 12 by a predetermined distance D. The predetermined distance D here refers to a distance from a bottom surface of the exhaust motor 2 to a top surface of the smoke collecting box 12. The exhaust motor 2 includes an outer shell 21 and a motor body 22. The outer shell 21 is a hollow body and has an upper opening 211 and a lower opening 212 formed opposite to each other. The motor body 22 is disposed in the outer shell 21. One end of the motor body 22 has an exhaust port 221. The exhaust port 221 corresponds to the upper opening 211. The exhaust port 221 of the motor body 22 can also extend upward from the outer shell 21 through the upper opening 211.

The air guide cylinder 3 is in a vertical arrangement and located between the smoke collecting box 12 of the range hood body 1 and the outer shell 21 of the exhaust motor 2. A lower end of the air guide cylinder 3 is spatially connected to the air outlet 120 of the smoke collecting box 12 of the range hood body 1, and an upper end of the air guide cylinder 3 is spatially connected to the lower opening 212 of the outer shell 21 of the exhaust motor 2. Furthermore, a height of the air guide cylinder 3 is equal to the aforementioned predetermined distance D. Specifically, the height of the air guide cylinder 3 is less than or equal to (≤) a height H of a surface of a portion of the smoke collecting box 12 protruding from the casing 11, such that the air guide cylinder 3 of this embodiment is an air guide cylinder having a low height and is vertically disposed. The elongated outer cover shell 4 is perpendicularly arranged relative to the range hood body 1 and covers the smoke collecting box 12, the air guide cylinder 3, and the exhaust motor 2. In this way, since the exhaust motor 2 is located in the space directly above the range hood body 1 and is spaced apart from the smoke collecting box 12 by the predetermined distance D, and the air guide cylinder 3 located between the exhaust motor 2 and the smoke collecting box 12 has the height equal to the predetermined distance D and is vertically disposed, the principle of hot air rising can be utilized to guide the cooking fumes to rise vertically to the exhaust motor 2, thereby increasing the smoothness of the flow of the cooking fumes and reducing wind resistance and noise. Compared with the existing inverted-T-shaped range hood in which the exhaust motor 2 is disposed in the smoke collecting box 12, the noise during use can be effectively reduced in the inverted-T-shaped split-type range hood of the present disclosure. Furthermore, since the outer cover shell 4 covers the smoke collecting box 12, the air guide cylinder 3, and the exhaust motor 2, the air guide cylinder 3 and the exhaust motor 2 are hidden and the improved inverted-T-shaped split-type range hood have the appearance of an inverted-T-shaped integrated range hood, thereby allowing the entire machine to be wall-hanging in the kitchen, so that the kitchen of a small house can also enjoy the extremely quiet effect provided by the split-type range hood.

In addition, in order to prevent gaps from being formed respectively between the upper end of the air guide cylinder 3 and the outer shell 21 of the exhaust motor 2, and the lower end of the air guide cylinder 3 and the smoke collecting box 12 of the range hood body 1 so as to cause poor airtightness, the air guide cylinder 3 of the present embodiment has a cylindrical portion 31 in a vertical arrangement, a first sleeve portion 32 integrally connected to an upper end of the cylindrical portion 31, and a second sleeve portion 33 integrally connected to a lower end of the cylindrical portion 31. The outer shell 21 of the exhaust motor 2 can have a lower flange 213 on the periphery of the lower opening 212. The lower flange 213 protrudes downward from the bottom surface of the outer shell 21, and the first sleeve portion 32 is sleeved on the lower flange 213, such that the upper end of the air guide cylinder 3 can be tightly joined with the outer shell 21 of the exhaust motor 2. Therefore, no gap is formed between the upper end of the air guide cylinder 3 and the exhaust motor 2, the air tightness is improved, and cooking fume leakage is prevented, such that the efficiency of removing the cooking fumes can be improved. In addition, an upper flange 121 may be provided on a periphery of the air outlet 120 of the smoke collecting box 12, the upper flange 121 protrudes upward from the surface of the smoke collecting box 12, and the second sleeve portion 33 is sleeved on the upper flange 121, such that the lower end of the air guide cylinder 3 can be tightly joined with the smoke collecting box 12. Therefore, no gap is formed between the lower end of the air guide cylinder 3 and the range hood body 1, the air tightness is improved, and cooking fume leakage is prevented, such that the efficiency of removing the cooking fumes can be improved. Furthermore, the occurrence of oil leakage is prevented, such that the range hood body 1 is prevented from contamination.

Furthermore, in order to further reduce the noise generated by the flow of the cooking fumes, the cylindrical portion 31 of the air guide cylinder 3 of this embodiment includes an inner circumferential wall 311 that is smooth to reduce the noise caused by the cooking fumes flowing and rubbing against the inner circumferential wall 311. Furthermore, the inner circumferential wall 311 of the cylindrical portion 31 may be a ground inner circumferential wall formed by grinding. Moreover, the inner circumferential wall 311 of the cylindrical portion 31 may be a polished inner circumferential wall formed by polishing. In addition, the inner circumferential wall 311 of the cylindrical portion 31 may be an inner circumferential wall having a surface coating formed by a surface coating process, and the surface coating of the inner circumferential wall 311 may be a high-temperature polymer coating. Furthermore, the upper flange 121 of the smoke collecting box 12 and the lower flange 213 of the exhaust motor 2 may respectively be one of a ground flange, a polished flange, and a flange having a surface coating.

In addition, as shown in FIG. 5, the smoke collecting box body 12 may further include an outer box wall 122, a flow guide shell 123, and a cover plate 124. The outer box wall 122 is fixed at a periphery of the air inlet 110. A portion near the bottom of the outer box wall 122 can be fixed to an upper edge of the air inlet 110 or an inner side of the air inlet 110 by threaded locking or riveting. The outer box wall 122 can provide a fixing function. The flow guide shell 123 is disposed inside the outer box wall 122. The flow guide shell 123 can provide a smooth surface to increase the smoothness of the flow and facilitate maintenance and cleaning. The cover plate 124 is fixedly connected to a top portion of the outer box wall 122 such as by threaded locking or riveting. The air outlet 120 and the upper flange 121 may be formed on the cover plate 124. A top portion of the flow guide shell 123 may be fixedly connected to the cover plate 124 such as by spot welding or riveting. The smoke collecting box 12 of this embodiment has the flow guide shell 123 inside the outer box wall 122, which improves an interior appearance of the outer box wall 122 and reduces the turbulence of the cooking fumes. The cooking fumes can pass through the flow guide shell 123 and be discharged upward from the air outlet 120 on the cover plate 124 more smoothly. Furthermore, since the exhaust motor is removed from the smoke collecting box 12, the height H of the smoke collecting box 12 protruding from the casing 11 can be reduced, thereby greatly reducing the overall height and weight of the range hood body 1, which is conducive for installation.

Furthermore, in order to enable the exhaust motor 2 to be hidden in the outer cover shell 4 in a wall-hanging manner, the outer shell 21 of the exhaust motor 2 has a front wall 214 and a rear wall 215 that are oppositely disposed in a front-rear manner as shown in FIG. 3. The rear wall 215 is a mounting wall, and an upper wall-hanging bracket 23 and a lower wall-hanging bracket 24 that are disposed opposite to each other in a top-down arrangement are mounted on the rear wall 215, such that the outer shell 21 of the exhaust motor 2 can be wall-hanging on a wall W of a kitchen through the upper wall-hanging bracket 23 and the lower wall-hanging bracket 24 that are disposed opposite to each other in a top-down arrangement and be hidden in the outer cover shell 4.

Specifically, the upper wall-hanging bracket 23 has an upper mounting piece 231, an upper connecting piece 232, and an upper wall-hanging piece 233. The upper connecting piece 232 is connected between the upper mounting piece 231 and the upper wall-hanging piece 233. The lower wall-hanging bracket 24 includes a lower mounting piece 241, a lower connecting piece 242, and a lower wall-hanging piece 243. The lower connecting piece 242 is connected between the lower mounting piece 241 and the lower wall-hanging piece 243.

Furthermore, the upper connecting piece 232 of the upper wall-hanging bracket 23 is perpendicular to the upper mounting piece 231 and perpendicular to the upper wall-hanging piece 233, and the upper mounting piece 231 and the upper wall-hanging piece 233 are respectively connected to two sides of the upper connecting piece 232 and extend in opposite directions. That is, the upper wall-hanging piece 233 extends upward, and the upper mounting piece 231 extends downward. Moreover, the lower connecting piece 242 of the lower wall-hanging bracket 24 is perpendicular to the lower mounting piece 241 and perpendicular to the lower wall-hanging piece 243, and the lower mounting piece 241 and the lower wall-hanging piece 243 are respectively connected to two sides of the lower connecting piece 242 and extend in opposite directions. That is, the lower wall-hanging piece 243 extends downward, and the lower mounting piece 241 extends upward. Accordingly, when the outer shell 21 is hung on the wall W through the upper wall-hanging piece 233 of the upper wall-hanging bracket 23 and the lower wall-hanging piece 243 of the lower wall-hanging bracket 24, the outer shell 21 can be hung on the wall stably while reducing resonance and noise.

In addition, a wiring space 25 for wiring to pass through is defined between the upper connecting piece 232 of the upper wall-hanging bracket 23 and the lower connecting piece 242 of the lower wall-hanging bracket 24 as shown in FIG. 3, such that the outer shell 21 of the exhaust motor 2 can be mounted on the wall W of the kitchen and hidden in the outer cover shell 4 through the upper wall-hanging bracket 23 and the lower wall-hanging bracket 24 that are disposed opposite to each other in a top-down arrangement. Furthermore, by defining the wiring space 25 between the upper wall-hanging bracket 23 and the lower wall-hanging bracket 24 that are disposed opposite to each other in a top-down arrangement, the wiring can be prevented from being entangled or disconnected.

In conclusion, the improved inverted-T-shaped split range hood provided by the present disclosure includes a range hood body 1, an exhaust motor 2, an air guide cylinder 3, and an outer cover shell 4. The range hood body 1 includes a casing 11 and a smoke collecting box 12. The casing 11 has an air inlet 110. The smoke collecting box 12 is disposed on the casing 11 and covers the air inlet 110. The smoke collecting box 12 has an air outlet 120. The air outlet 120 of the smoke collecting box 12 is spatially connected to the air inlet 110 of the casing 11. The exhaust motor 2 is located in a space directly above the range hood body 1 and is spaced apart from the smoke collecting box 12 by a predetermined distance D. The exhaust motor 2 includes an outer shell 21 and a motor body 22. The outer shell 21 has an upper opening 211 and a lower opening 212 formed opposite to each other. The motor body 22 is disposed in the outer shell 21, and one end of the motor body 22 has an exhaust port 221 corresponding to the upper opening 211. The air guide cylinder 3 is in a vertical arrangement and located between the smoke collecting box 12 of the range hood body 1 and the outer shell 21 of the exhaust motor 2. A height of the air guide cylinder 3 is equal to the predetermined distance D. A lower end of the air guide cylinder 3 is spatially connected to the air outlet 120 of the smoke collecting box 12 of the range hood body 1, and an upper end of the air guide cylinder 3 is spatially connected to the lower opening 212 of the outer shell 21 of the exhaust motor 2. The elongated outer cover shell 4 is perpendicularly arranged relative to the range hood body 1 and covers the smoke collecting box 12, the air guide cylinder 3, and the exhaust motor 2. In this way, the present disclosure can effectively reduce the noise during use. Furthermore, since the outer cover shell 4 covers the smoke collecting box 12, the air guide cylinder 3, and the exhaust motor 2, the air guide cylinder 3 and the exhaust motor 2 are hidden and the improved inverted-T-shaped split-type range hood have the appearance of an inverted-T-shaped integrated range hood, thereby allowing the entire machine to be wall-hanging in the kitchen, such that the kitchen of a small house can also enjoy the quiet effect provided by the split-type range hood.

The foregoing description of the exemplary embodiments of the disclosure has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.

The embodiments were chosen and described in order to explain the principles of the disclosure and their practical application so as to enable others skilled in the art to utilize the disclosure and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present disclosure pertains without departing from its spirit and scope.

Claims

What is claimed is:

1. An inverted-T-shaped split-type range hood, comprising:

a range hood body including a casing and a smoke collecting box, wherein the casing has an air inlet, the smoke collecting box is disposed on the casing, and the smoke collecting box covers the air inlet, and wherein the smoke collecting box has an air outlet, and the air outlet of the smoke collecting box is spatially connected to the air inlet of the casing;

an exhaust motor located in a space above the range hood body and spaced apart from the smoke collecting box by a predetermined distance, wherein the exhaust motor includes an outer shell and a motor body, and the outer shell has an upper opening and a lower opening formed opposite to each other, and wherein the motor body is disposed in the outer shell, and one end of the motor body has an exhaust port corresponding to the upper opening;

an air guide cylinder in a vertical arrangement and located between the smoke collecting box of the range hood body and the outer shell of the exhaust motor, wherein a height of the air guide cylinder is equal to the predetermined distance, a lower end of the air guide cylinder is spatially connected to the air outlet of the smoke collecting box of the range hood body, and an upper end of the air guide cylinder is spatially connected to the lower opening of the outer shell of the exhaust motor; and

an outer cover shell perpendicularly arranged relative to the range hood body and covering the smoke collecting box, the air guide cylinder, and the exhaust motor.

2. The inverted-T-shaped split-type range hood according to claim 1, wherein the air guide cylinder has a cylindrical portion in a vertical arrangement, a first sleeve portion integrally connected to an upper end of the cylindrical portion, and a second sleeve portion integrally connected to a lower end of the cylindrical portion, wherein the outer shell has a lower flange located on the periphery of the lower opening, the lower flange protrudes downward from the outer shell, and the first sleeve portion is sleeved on the lower flange, and wherein the smoke collecting box has an upper flange located on a periphery of the air outlet, the upper flange protrudes upward from the smoke collecting box, and the second sleeve portion is sleeved on the upper flange.

3. The inverted-T-shaped split-type range hood according to claim 2, wherein the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is a ground inner circumferential wall formed by grinding.

4. The inverted-T-shaped split-type range hood according to claim 2, wherein the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is a polished inner circumferential wall formed by polishing.

5. The inverted-T-shaped split-type range hood according to claim 2, wherein the cylindrical portion includes an inner circumferential wall that is smooth, and the inner circumferential wall is an inner circumferential wall having a surface coating formed by surface coating.

6. The inverted-T-shaped split-type range hood according to claim 1, wherein the smoke collecting box includes an outer box wall, a flow guide shell, and a cover plate, and wherein the outer box wall is fixed at a periphery of the air inlet, the flow guide shell is disposed inside the outer box wall, and the cover plate is fixedly connected to a top portion of the outer box wall.

7. The inverted-T-shaped split-type range hood according to claim 1, wherein the outer shell has a front wall and a rear wall disposed opposite to each other, and an upper wall-hanging bracket and a lower wall-hanging bracket disposed opposite to each other in a top-down arrangement are mounted on the rear wall, so that the exhaust motor can be mounted on a wall of a kitchen through the upper wall-hanging bracket and the lower wall-hanging bracket disposed opposite to each other in a top-down arrangement and be hidden in the outer cover shell.

8. The inverted-T-shaped split-type range hood according to claim 7, wherein the upper wall-hanging bracket has an upper mounting piece, an upper connecting piece, and an upper wall-hanging piece, and the upper connecting piece is connected between the upper mounting piece and the upper wall-hanging piece, and wherein the lower wall-hanging bracket has a lower mounting piece, a lower connecting piece, and a lower wall-hanging piece, and the lower connecting plate is connected between the lower mounting piece and the lower wall-hanging piece.

9. The inverted-T-shaped split-type range hood according to claim 8, wherein the upper connecting piece of the upper wall-hanging bracket is perpendicular to the upper mounting piece and perpendicular to the upper wall-hanging piece, and the upper mounting piece and the upper wall-hanging piece are respectively connected to two sides of the upper connecting piece and extend in opposite directions, and wherein the lower connecting piece of the lower wall-hanging bracket is perpendicular to the lower mounting piece and perpendicular to the lower wall-hanging piece, and the lower mounting piece and the lower wall-hanging piece are respectively connected to two sides of the lower connecting piece and extend in opposite directions.

10. The inverted-T-shaped split-type range hood according to claim 8, wherein a wiring space for wiring to pass through is defined between the upper connecting piece of the upper wall-hanging bracket and the lower connecting piece of the lower wall-hanging bracket.