SCROLL COMPRESSOR

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a National Stage application of International Patent Application No. PCT/CN2023/109791, filed on Jul. 28, 2023, which claims priority to Chinese Patent Applications No. 202210925355.6, filed on Jul. 29, 2022, and No. 202222027416.5, filed on Jul. 29, 2022, each of which is hereby incorporated by reference in its entirety.

TECHNICAL FIELD

Embodiments of the present invention relate to a scroll compressor.

BACKGROUND

A scroll compressor generally includes two scrolls. Two scrolls mate to form a compression chamber for compressing a medium. Due to high temperature of the compressed medium discharged from the compression chamber, the compressed medium may have an impact on a to-be-compressed medium sucked into the compression chamber formed by the two scrolls.

SUMMARY

Embodiments of the present invention provide a scroll compressor, which can reduce the impact of high-temperature compressed medium discharged from the compression chamber on the to-be-compressed medium sucked into the compression chamber formed by the first and second scrolls.

An embodiment of the present invention provides a scroll compressor including: a housing; a partition wall disposed in the housing, the partition wall dividing a space inside the housing into a first space below the partition wall and a second space above the partition wall, the partition wall having an opening in a central portion; a first scroll disposed in the first space inside the housing, the first scroll including a first end plate and a first scroll wrap extending downward from the first end plate, and a port penetrating a central portion of the first end plate; a second scroll disposed in the first space inside the housing, the second scroll including a second end plate and a second scroll wrap extending upward from the second end plate, the second scroll wrap and the first scroll wrap engaging to form a compression chamber for compressing a medium; an discharge member having a lower end of the discharge member above the port of the first end plate of the first scroll and an upper end of the discharge member connected to an edge of the opening of the partition wall, the discharge member having an internal passage for discharging compressed medium from the port of the first end plate of the first scroll to the second space above the partition wall; and a heat shield disposed between the partition wall and the first end plate of the first scroll.

According to an embodiment of the present invention, the heat shield includes an annular disc-shaped portion and has a central hole, the discharge member passes through the central hole.

According to an embodiment of the present invention, the heat shield includes an annular disc-shaped portion and a cylindrical portion extending downward from an inner periphery of the annular disc-shaped portion, and a lower portion of the discharge member is disposed in the cylindrical portion of the heat shield.

According to an embodiment of the present invention, the heat shield is connected to the housing.

According to an embodiment of the present invention, the scroll compressor further includes: a driving member disposed below the second scroll, the driving member including a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion; and a scroll cover including: an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll, and the discharge member passes through the central hole of the end plate of the scroll cover, wherein at least a part of the heat shield is disposed between the partition wall and the scroll cover.

According to an embodiment of the present invention, the heat shield includes an annular disc-shaped portion with a central hole, the discharge member passes through the central hole, the disc-shaped portion of the heat shield is spaced apart from the end plate of the scroll cover, and a suction passage is formed between an outer peripheral surface of the discharge member and a hole wall of the central hole of the end plate of the scroll cover, a to-be-compressed medium enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll. According to an embodiment of the present invention, the downward from an inner periphery of the annular disc-shaped portion, a lower portion of the discharge member is disposed in the cylindrical portion of the heat shield, and the disc-shaped portion of the heat shield is spaced apart from the end plate of the scroll cover, and a suction passage is formed between an outer peripheral surface of the cylindrical portion of the heat shield and a hole wall of the central hole of the end plate of the scroll cover, a to-be-compressed medium enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.

According to an embodiment of the present invention, the disc-shaped portion of the heat shield has an upward convex shape.

According to an embodiment of the present invention, the heat shield further includes a flange extending outward from a lower end of the cylindrical portion, and the flange is adjacent to the first end plate of the first scroll.

According to an embodiment of the present invention, the heat shield is formed from a metal plate through a stamping process.

According to an embodiment of the present invention, the scroll compressor further includes: a motor; a driving member located below the second scroll, wherein the motor drives the first scroll to rotate through the driving member, and the first scroll drives the second scroll to rotate, the driving member includes a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion; and a support, wherein the driving member is rotatably supported on the support.

According to an embodiment of the present invention, the scroll compressor further includes: a scroll cover including an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll.

According to an embodiment of the present invention, the scroll compressor further includes: a fixed shaft, wherein a lower end of the fixed shaft is fixed to the support, and the hub portion of the driving member is rotatably mounted on the fixed shaft.

According to an embodiment of the present invention, the support includes a cylindrical portion, and the driving member is rotatably supported on the cylindrical portion of the support.

According to an embodiment of the present invention, a part of the fixed shaft is inserted into the cylindrical portion of the support and fixed to the cylindrical portion of the support, and the fixed shaft has a cylindrical shape.

According to an embodiment of the present invention, the scroll compressor further includes: a motor; and a compressor suction port disposed in the housing; wherein a to-be-compressed medium is sucked into the scroll compressor from the compressor suction port, and enters the compression chamber of the first scroll and the second scroll through a gap between the motor, the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.

According to an embodiment of the present invention, the first end plate further includes a groove surrounding the compressor suction port, the scroll compressor further includes a sealing ring disposed in the groove and extending from the groove, the sealing ring is located between the lower end of the discharge member and the first end plate to form a sealing between the lower end of the discharge member and the first end plate.

According to an embodiment of the present invention, the sealing ring has a C-shaped cross section, and an opening of the sealing ring faces a rotation axis of the first scroll.

According to an embodiment of the present invention, the sealing ring has a recess on an outer periphery thereof; and the scroll compressor further includes an anti-rotation pin fixed to the first end plate of the first scroll and has a stop portion protruding into the groove, the stop portion fits with the recess of the sealing ring.

According to an embodiment of the present invention, the scroll compressor further includes: a driving member located below the second scroll, the driving member including a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion, wherein the first scroll includes a scroll cover integrally cast with the first scroll, and the scroll cover includes an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll, the discharge member passes through the central hole of the end plate of the scroll cover, and at least a part of the heat shield is disposed between the partition wall and the scroll cover.

According to the technical solution of the embodiments of the present invention, by providing a heat shield, the impact of high-temperature medium discharged from the compression chamber on the to-be-compressed medium sucked into the compression chamber formed by the first and second scrolls is mitigated.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of a heat shield of a scroll compressor according

to an embodiment of the present invention;

FIG. 3 is another schematic perspective view of the heat shield of the scroll compressor according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of the heat shield of the scroll compressor shown in FIGS. 2 and 3;

FIG. 5 is a schematic perspective view of a heat shield of a scroll compressor according to another embodiment of the present invention;

FIG. 6 is another schematic perspective view of a heat shield of a scroll compressor according to another embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of the heat shield of the scroll compressor shown in FIGS. 5 and 6; and

FIG. 8 is a schematic cross-sectional perspective view of some components of a scroll compressor according to an embodiment of the present invention.

DETAILED DESCRIPTION

Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

Referring to FIG. 1, a scroll compressor 100 according to an embodiment of the present invention includes a housing 101, a partition wall 103, a first scroll 11, a second scroll 12, a discharge member 8 and a heat shield 9. The partition wall 103 is disposed in the housing 101, dividing a space 105 inside the housing 101 into a first space 107 below the partition wall 103 and a second space 109 above the partition wall 103. The partition wall 103 has an opening 1030 in the central portion. The first scroll 11 is disposed in the first space 107 inside the housing 101. The first scroll 11 includes a first end plate 112, a first scroll wrap 113 extending downward from the first end plate 112, and a port 1120 penetrating the central portion of the first end plate 112. The second scroll 12 is disposed in the first space 107 inside the housing 101. The second scroll 12 includes a second end plate 123 and a second scroll wrap 124 extending upward from the second end plate 123. The second scroll wrap 124 and the first scroll wrap 113 mate to form a compression chamber for compressing a medium. A lower end 81 of discharge member 8 is located above the port 1120 of the first end plate 112 of the first scroll 11, and an upper end 82 of the discharge member 8 is connected to an edge 1031 of the opening 1030 of the partition wall 103. The discharge member 8 has an internal passage 80 for discharging compressed medium from the port 1120 of the first end plate 112 of the first scroll 11 to the second space 109 above the partition wall 103. A sealing ring 86 may be mounted around the port 1120 on the first end plate 112 of the first scroll 11. The sealing ring 86 is located between the lower end 81 of the discharge member 8 and the first end plate 112 of the first scroll 11. A heat shield 9 is disposed between the partition wall 103 and the first end plate 112 of the first scroll 11. The heat shield 9 is connected to the housing 101. For example, the heat shield 9 is connected to the housing 101 by welding. The heat shield 9 may be formed from a metal plate through a stamping process. The heat shield 9 may be a thin-walled metal component.

Referring to FIG. 1, in the embodiment of the present invention, the scroll compressor 100 further includes: a driving member 3, a support 4, a fixed shaft 5, and a motor 7. The motor 7 includes a rotor 71 fixed to the driving member 3 and a stator 72 fixed to the support 4. The driving member 3 is disposed below the second scroll 12, and includes a hub portion 31 with an inner hole 30; and a flange portion 32 extending outward from an end 311 of the hub portion 31 in a radial direction of the hub portion 31. The support 4 is located on a side of the second scroll 12 away from the first scroll 11. A scroll cover 6 is connected to the flange portion 32 of the driving member 3, for example, by bolts, and to the first scroll 11, for example, by bolts, thereby fixedly connecting the driving member 3 to the first scroll 11. In an implementation, the scroll cover 6 may be an integrally cast member with the first scroll 11, rather than a member connected to the first scroll 11. The driving member 3 is rotatably mounted on the support 4 and disposed on a side of the second scroll 12 away from the first scroll 11, with a lower end of the fixed shaft 5 fixed to the support 4. The hub portion 31 of the driving member 3 is rotatably mounted on the fixed shaft 5, allowing the driving member 3 to be rotatably mounted on the support 4. The support includes a cylindrical portion 41, and the driving member 3 is rotatably supported on the cylindrical portion 41 of the support 4. A part of the fixed shaft 5 is inserted into the cylindrical portion 41 of the support 4 and fixed to the cylindrical portion 41 of the support, and the fixed shaft 5 has a cylindrical shape. The second end plate 123 of the second scroll 12 is rotatably supported on the flange portion 32 of the driving member 3. The rotor 71 of the motor 7 drives the first scroll 11 to rotate through the driving member 3 and the scroll cover 6, and the first scroll 11 drives the second scroll 12 to rotate.

Referring to FIGS. 5 to 7, in an embodiment of the present invention, the heat shield 9 includes an annular disc-shaped portion 91 and has a central hole 90.

Referring to FIGS. 2 to 4, in another embodiment of the present invention, the heat shield 9 includes an annular disc-shaped portion 91 and a cylindrical portion 92 extending downward from an inner periphery of the annular disc-shaped portion 91. Referring to FIG. 1, a lower portion 83 of the discharge member 8 is disposed in the cylindrical portion 92 of the heat shield 9.

Referring to FIG. 1, in the embodiment of the present invention, the scroll compressor 100 further includes a scroll cover 6. The scroll cover 6 includes an end plate 61 with a central hole 60, and a cylindrical portion 62 extending downward from an outer periphery 610 of the end plate 61. The cylindrical portion 62 of the scroll cover 6 is connected to the flange portion 32 of the driving member 3, and the end plate 61 of the scroll cover 6 is connected to the first end plate 112 of the first scroll 11. The discharge member 8 passes through the central hole 60 of the end plate 61 of the scroll cover 6. At least a part of the heat shield 9 (e.g., the annular disc-shaped portion 91) is disposed between the partition wall 103 and the scroll cover 6.

Referring to FIGS. 1 to 4, in the embodiment of the present invention, the disc-shaped portion 91 of the heat shield 9 is spaced apart from the end plate 61 of the scroll cover 6. A suction passage 65 is formed between an outer peripheral surface 920 of the cylindrical portion 92 of the heat shield 9 and a hole wall 601 of the central hole 60 of the end plate 61 of the scroll cover 6. A to-be-compressed medium from a compressor suction port 106 disposed on the housing 101 enters the compression chamber of the first scroll 11 and the second scroll 12 through a gap between the motor 7, the disc-shaped portion 91 of the heat shield 9 and the end plate 61 of the scroll cover 6, the suction passage 65, a gap formed between the end plate 61 of the scroll cover 6 and the first end plate 112 of the first scroll 11, and a gap between an inner wall of the cylindrical portion 62 of the scroll cover 6 and the first scroll and the second scroll 11 and 12.

Referring to FIG. 1, when replacing the heat shield 9 in FIG. 1 with the heat shield 9 shown in FIGS. 5 to 7, the discharge member 8 passes through the central hole 90 of the heat shield 9. The disc-shaped portion 91 of the heat shield 9 is spaced apart from the end plate 61 of the scroll cover 6. A suction passage 65 is formed between an outer peripheral surface 85 of the discharge member 8 and the hole wall 601 of the central hole 60 of the end plate 61 of the scroll cover 6. A to-be-compressed medium from a compressor suction port 106 disposed on the housing 101 enters the compression chamber of the first scroll 11 and the second scroll 12 through a gap between the motor 7, the disc-shaped portion 91 of the heat shield 9 and the end plate 61 of the scroll cover 6, the suction passage 65, a gap formed between the end plate 61 of the scroll cover 6 and the first end plate 112 of the first scroll 11, and a gap between an inner wall of the cylindrical portion 62 of the scroll cover 6 and the first scroll and the second scroll 11 and 12.

Referring to FIGS. 1 and 8, in the embodiment of the present invention, the first end plate 112 includes a port 1120 that penetrates the central portion of the first end plate 112; and a groove 1121 surrounding the port 1120. Referring to FIGS. 1 and 8, the scroll compressor 100 further includes a sealing ring 86 and a discharge member 8. The sealing ring 86 is disposed in the groove 1121 and extends from the groove 1121. The lower end 81 of the discharge member 8 is disposed above the port 1120 of the first end plate 112 of the first scroll 11. The discharge member 8 has an internal passage 80 for discharging compressed refrigerant from the port 1120 of the first end plate 112 of the first scroll 11. The sealing ring 86 is disposed between the lower end 81 of the discharge member 8 and the first end plate 112 to form a sealing between the lower end 81 of the discharge member 8 and the first end plate 112. Referring to FIG. 8, the sealing ring 86 may have a C-shaped cross section, with an opening 862 of the sealing ring 86 facing a rotational axis of the first scroll 11. A supporting spring may be disposed in the sealing ring 86. The sealing ring 86 may have a recess 863 on the outer periphery thereof. The scroll compressor 100 may further include an anti-rotation pin 864. The anti-rotation pin 864 is fixed to the first end plate 112 of the first scroll 11 and has a stop portion protruding into the groove 1121. The stop portion fits with the recess 863 of the sealing ring 86 to prevent the sealing ring 86 from rotating relative to the first scroll 11. For example, the anti-rotation pin 864 is inserted into an anti-rotation pin hole 865 in the first scroll 11.

Referring to FIGS. 1 to 7, in the embodiment of the present invention, the disc-shaped portion 91 of the heat shield 9 has an upward convex shape. Referring to FIGS. 3 to 4, the heat shield 9 further includes a flange 93 extending outward from a lower end of the cylindrical portion 92, and the flange 93 is adjacent to the first end plate 112 of the first scroll 11. Thus, the heat shield 9 is positioned more stably.

Referring to FIG. 1, in the embodiment of the present invention, the motor 7 may be an axial flux motor or a radial flux motor. In some embodiments, the motor 7 includes a stator fixed to the support 4 and a rotor, and the rotor of the motor 7 drives the first scroll 11 to rotate by driving the driving member 3 to rotate.

In the compressor according to the embodiments of the present invention, the heat shield may guide a medium into the suction passage 65.

According to the embodiments of the present invention, the compressor is equipped with a heat shield to block transfer of heat from the high-temperature refrigerant to the vicinity of the scroll cover, thereby mitigating the impact of the high-temperature medium discharged from the compression chamber on the to-be-compressed medium sucked into the compression chamber formed by the first and second scrolls. It can reduce the degree of overheating of the to-be-compressed medium sucked into the compression chamber formed by the first and second scrolls. In addition, the heat shield is easy to manufacture and mount.

Although the above embodiments have been described, some features of the above embodiments may be combined to form new embodiments.

While the present disclosure has been illustrated and described with respect to a particular embodiment thereof, it should be appreciated by those of ordinary skill in the art that various modifications to this disclosure may be made without departing from the spirit and scope of the present disclosure.