Scroll compressor

Abstract

The scroll compressor comprises a shell, a static scroll plate, a dynamic scroll plate and a motor, the static scroll plate, the dynamic scroll plate and the motor are located in the shell, and the motor comprises a stator fixed to the shell, a rotor located on the radial inner side of the stator and a main shaft supporting the rotor. The shell internally defines a near-side cavity and a far-side cavity which are located on the two opposite sides of the stator in the axial direction, the near-side cavity accommodates the static vortex disc and the dynamic vortex disc, the main shaft is internally provided with a main shaft channel communicating the far-side cavity with the near-side cavity, and the main shaft is internally provided with a main shaft cavity communicating the far-side cavity with the near-side cavity. And the shell is provided with an air inlet leading to the far-side cavity.

Description

Technical Field

[0001] The present disclosure relates to the technical field of compressors, and more particularly, to an improved scroll compressor. Background Art

[0002] Scroll compressors are widely used in various applications due to their advantages such as high efficiency, energy saving, and low noise. Their working principle is to utilize the relative revolution of a moving scroll and a stationary scroll to form a continuous change in the enclosed volume, thereby achieving the purpose of compressing gaseous media. The moving scroll of a scroll compressor is driven by an eccentric shaft and rotates in a plane with a small radius around the center of the base circle of the stationary scroll. The medium is gradually compressed in several crescent-shaped compression chambers formed by the engagement of the moving and stationary scroll bodies, and then continuously discharged through the axial hole at the center of the stationary scroll. In the existing design layout of scroll compressors, all the media to be compressed (e.g., refrigerant) need to reach the moving scroll and the stationary scroll after cooling the motor and the inverter to start the compression process. Since all the media are heated by the motor and the inverter before compression, this heating effect caused by the inverter and the motor will increase the temperature of all the media, thereby reducing the efficiency of the compressor. Sometimes, the state of the media at the outlet of the compressor even exceeds the adjustment limit. In addition, during the compression process, the temperature of the media will rise significantly with the increase in pressure. This means that the compression process deviates from the isothermal process, which also reduces the efficiency of the compressor.

[0003] Therefore, in the field of scroll compressors, there is an urgent need for a technical solution to avoid the heating of all the media to be compressed by the motor and the inverter and to make the compression process closer to the isothermal process. Summary of the Utility Model

[0004] To solve the above problems in the prior art, the present disclosure provides an improved scroll compressor, which includes a housing and a stationary scroll, a moving scroll, and a motor located inside the housing. Among them, the motor includes a stator fixed on the housing, a rotor located radially inside the stator, and a main shaft supporting the rotor. The housing defines a proximal chamber and a distal chamber on opposite axial sides of the stator inside. The proximal chamber houses the stationary scroll and the moving scroll, and wherein the main shaft is internally provided with a main shaft passage communicating the distal chamber with the proximal chamber, and the housing is provided with an air inlet leading to the distal chamber.

[0005] According to an optional embodiment of the present disclosure, the moving scroll is coupled to the stationary scroll and the main shaft respectively on opposite axial sides. The moving scroll is spaced apart from the main shaft to form a gap therebetween, and the gap communicates the proximal chamber with the main shaft passage.

[0006] According to an alternative embodiment of the present disclosure, the main shaft has proximal and distal ends that are axially opposite and is provided with an eccentric pin protruding from the proximal end at an eccentric position, and the main shaft passage extends from the distal end to the end of the eccentric pin.

[0007] According to an alternative embodiment of the present disclosure, the scroll compressor further includes an eccentric block and a bearing connecting the eccentric block to the orbiting scroll, the eccentric pin passing through the eccentric block to eccentrically position the eccentric block relative to the main shaft, and the clearance being located between the orbiting scroll and the eccentric block.

[0008] According to an alternative embodiment of the present disclosure, the eccentric block is in clearance fit with the bearing.

[0009] According to an alternative embodiment of the present disclosure, the main shaft passage extends axially.

[0010] According to an alternative embodiment of the present disclosure, the scroll compressor further includes a distal cover located in the distal chamber to divide it into a first distal chamber adjacent to the stator and a second distal chamber communicating with the intake hole, and is provided with a distal through hole communicating the first distal chamber with the second distal chamber.

[0011] According to an alternative embodiment of the present disclosure, the main shaft passes through the distal cover such that the main shaft passage communicates the second distal chamber with the proximal chamber.

[0012] According to an alternative embodiment of the present disclosure, the scroll compressor further includes a proximal cover located in the proximal chamber to divide it into a first proximal chamber accommodating the fixed scroll and the orbiting scroll and a second proximal chamber adjacent to the stator, and is provided with a proximal through hole communicating the first proximal chamber with the second proximal chamber.

[0013] According to an alternative embodiment of the present disclosure, the proximal cover is provided with a proximal bearing for supporting the main shaft, and the distal cover is provided with a distal bearing for supporting the main shaft.

[0014] According to an alternative embodiment of the present disclosure, the stator includes a stator core fixed to the housing and a stator winding attached to the stator core, the stator core being provided with a plurality of stator passages, each stator passage axially passing through the stator core.

[0015] According to an alternative embodiment of the present disclosure, the stator core has an outer surface adjacent to the housing, and each stator passage is formed by a groove recessed from the outer surface of the stator core.

[0016] According to an alternative embodiment of the present disclosure, the stator core is provided with a plurality of winding slots for receiving the wires of the stator winding, wherein each stator channel is formed by a gap around the wires in each winding slot.

[0017] According to an alternative embodiment of the present disclosure, the motor further includes an isolation cylinder located between the stator and the rotor to isolate the stator and the rotor from each other.

[0018] According to an alternative embodiment of the present disclosure, the orbiting scroll is internally provided with a scroll passage communicating the gap with the proximal chamber.

[0019] According to an alternative embodiment of the present disclosure, the scroll passage has an axial branch extending axially and leading to the gap and a radial branch extending radially and leading to the proximal chamber.

[0020] According to an alternative embodiment of the present disclosure, the scroll compressor further includes an inverter for controlling the motor, and the inverter is attached to the outer surface of the housing opposite to the distal chamber.

[0021] The present disclosure can be embodied in the schematic embodiments in the drawings. However, it should be noted that the drawings are merely schematic, and any changes conceived under the teachings of the present disclosure should be considered to be included within the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings illustrate exemplary embodiments of the present disclosure. These drawings should not be construed as necessarily limiting the scope of the present disclosure, wherein:

[0023] Figure 1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present disclosure;

[0024] Figure 2 is a schematic cross-sectional view of a scroll compressor according to another embodiment of the present disclosure;

[0025] Figure 3 is a schematic cross-sectional view of a scroll compressor according to yet another embodiment of the present disclosure;

[0026] Figure 4 is along Figure 3 a schematic partial cross-sectional view of the stator of the motor taken along line A-A in

[0027] Figure 5 is a schematic cross-sectional view of a scroll compressor according to still another embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] Further features and advantages of the present disclosure will become more apparent from the following description with reference to the accompanying drawings. Exemplary embodiments of the present disclosure are shown in the drawings, and the various drawings are not necessarily drawn to actual scale. However, the present disclosure can be implemented in many different forms and should not be construed as necessarily limited to the exemplary embodiments disclosed herein. Instead, these exemplary embodiments are provided only to illustrate the present disclosure and to convey the spirit and essence of the present disclosure to those skilled in the art.

[0029] The present disclosure aims to provide a scroll compressor with a novel design. According to the novel design of the present disclosure, a medium such as refrigerant can cool the drive motor before being compressed. Thereby, the heat dissipation of the drive motor can be significantly improved, which provides the possibility of increasing the power of the drive motor, and thus can improve the compression capacity of the scroll compressor and increase its working efficiency. Additionally, according to the novel design of the present disclosure, the medium can also cool the orbiting scroll before being compressed, which can make the compression process achieved by the orbiting scroll and the fixed scroll approach an isothermal process, and this helps to reduce the energy consumption of the scroll compressor. In particular, according to the novel design of the present disclosure, the medium for cooling the drive motor can be reliably separated from the medium for cooling the orbiting scroll, which can prevent the drive motor from heating the medium for cooling the orbiting scroll to a higher temperature, thereby ensuring the effective heat dissipation of the orbiting scroll, and this can ensure that the compression process is closer to an isothermal process to further reduce the energy consumption of the scroll compressor. In short, the scroll compressor according to the present disclosure has improved compression capacity, increased working efficiency, and reduced energy consumption due to its novel design. Of course, the scroll compressor according to the present disclosure is not limited to these advantages, and other various advantages (including those not mentioned herein) will become apparent from the following description.

[0030] The following describes in detail various alternative but non-limiting embodiments of the scroll compressor according to the present disclosure with reference to the respective drawings. It should be noted that in the terms used in the present disclosure, unless otherwise clearly defined, the terms "axial direction", "radial direction", "circumferential direction", etc. have their ordinary meanings in the art. Specifically, the axial direction can be defined by the rotation axis of the main shaft of the scroll compressor, the radial direction can be any direction perpendicular to the axial direction, and the circumferential direction can be any direction surrounding the axial direction.

[0031] Refer to Figure 1 , which shows a schematic cross-sectional view of a scroll compressor according to an embodiment of the present disclosure. As Figure 1As shown, the scroll compressor 10 includes a housing 100 which defines an internal chamber 110 therein, and the scroll compressor 10 generally further includes a stationary scroll 200 accommodated in the internal chamber 110, a moving scroll 300 cooperating with the stationary scroll 200, and a motor 400 for driving the moving scroll 300. Among them, the stationary scroll 200 and the motor 400 are located on opposite sides of the moving scroll 300 along the axial direction XX'. In this article, these two sides are respectively referred to as the proximal side (the side pointed by the arrow X) and the distal side (the side pointed by the arrow X'). That is to say, the moving scroll 300 has a proximal side and a distal side opposite to each other along the axial direction XX', and is coupled to the stationary scroll 200 on the proximal side and coupled to the motor 400 on the distal side.

[0032] Specifically, the stationary scroll 200 is fixedly arranged in the internal chamber 110 and includes a stationary disk body 210 and a stationary scroll body 220 protruding from the stationary disk body 210 along the axial direction XX'. Among them, the stationary scroll body 220 extends from the center of the stationary disk body 210 towards the periphery of the stationary disk body 210 along an involute or in the form of an involute. The moving scroll 300 is movably arranged in the internal chamber 110 and includes a moving disk body 310 and a moving scroll body 320 protruding from the moving disk body 310 along the axial direction XX'. Among them, the moving scroll body 320 extends from the center of the moving disk body 310 towards the periphery of the moving disk body 310 along an involute or in the form of an involute. The stationary scroll body 220 of the stationary scroll 200 and the moving scroll body 320 of the moving scroll 300 are arranged facing each other, so that the stationary scroll body 220 is oriented to protrude from the stationary disk body 210 towards the moving disk body 310, while the moving scroll body 320 is oriented to protrude from the moving disk body 310 towards the stationary disk body 210. In addition, the side wall of the stationary scroll body 220 can be joined to the side wall of the moving scroll body 320, thereby defining a plurality of working chambers distributed along the involute therebetween. In these working chambers, the volume of the working chamber closer to the center of the involute is smaller, and the volume of the working chamber closer to the periphery of the involute is larger.

[0033] The motor 400 includes a stator 410 fixed to the housing 100, a rotor 420 and a main shaft 430 rotatably disposed within the internal chamber 110. Among them, the rotor 420 is located radially inside the stator 410 and is spaced apart from the stator 410 in the radial direction, so that the rotor 420 can rotate around the rotation axis driven by the rotating magnetic field generated after the stator 410 is energized. The main shaft 430 extends through the rotor 420 and is fixedly connected to (more generally, non-rotatably connected to) the rotor 420, so that the rotor 420 is rotatably supported by the main shaft 430 within the internal chamber 110, and the main shaft 430 can rotate around the rotation axis together with the rotor 420. In addition, the main shaft 430 is also coupled to the orbiting scroll 300, so that the orbiting scroll 300 can revolve around the rotation axis as the main shaft 430 rotates around the rotation axis. That is to say, the rotation of the main shaft 430 around the rotation axis can be converted into the revolution of the orbiting scroll 300 around the rotation axis. Of course, in order to suppress the rotation tendency of the orbiting scroll 300, the scroll compressor 10 may further include an anti-rotation structure acting on the orbiting scroll 300, so as to ensure that when the main shaft 430 rotates around the rotation axis, the orbiting scroll 300 revolves or translates around the rotation axis without rotating or spinning.

[0034] Under the above configuration, the motor 400 can drive the main shaft 430 to rotate after being powered on, and the main shaft 430 can in turn drive the orbiting scroll 300 to revolve. As the orbiting scroll 300 revolves, each of the multiple working chambers defined between the side walls of the stationary scroll body 220 and the side walls of the orbiting scroll body 320 will move along an involute from the peripheries of the stationary scroll body 220 and the orbiting scroll body 320 towards their centers, and the working chambers that move to the centers of the stationary scroll body 220 and the orbiting scroll body 320 will disappear. At the same time, new working chambers will be generated at the peripheries of the stationary scroll body 220 and the orbiting scroll body 320, and the volume of each working chamber will gradually decrease as the above-mentioned movement occurs. Therefore, during the operation of the scroll compressor 10, a medium (e.g., air, nitrogen, or a refrigerant such as R22, HFC) can enter the working chambers from the peripheries (i.e., radially outside) of the stationary scroll body 220 and the orbiting scroll body 320, and then be transported and compressed by the working chambers towards their centers, and finally be discharged from the working chambers (e.g., through the exhaust holes 211 provided in the stationary disk body 210) at their centers. As the orbiting scroll 300 continuously revolves, the medium can be continuously transported, compressed, and discharged in the above manner. However, during the above compression process, not only will the pressure of the medium increase, but the temperature of the medium will also increase accordingly. Compared with the isothermal compression process, the variable-temperature compression process results in an increase in the energy consumption of the scroll compressor. In addition, the temperature of the motor will also increase during operation, and the heat dissipation problem of the motor is one of the main constraints on the improvement of the motor power, and thus has an adverse impact on the working efficiency of the scroll compressor. To solve these problems, the present disclosure proposes the following novel design.

[0035] Continue to refer to Figure 1, the stator 410 and the rotor 420 of the electric motor 400 divide the internal chamber 110 into a proximal chamber 111 and a distal chamber 112 separated along the axial direction XX', that is to say, the proximal chamber 111 and the distal chamber 112 are located on opposite sides of the stator 410 and the rotor 420 along the axial direction XX'. Among them, the fixed scroll 200 and the moving scroll 300 are accommodated in the proximal chamber 111, and the housing 100 is provided with an air inlet hole 101 which extends through the housing 100 and leads to the distal chamber 112. In addition, on the distal side of the moving scroll 300 (i.e., the side pointed by the arrow X'), the main shaft 430 is spaced apart from the moving scroll 300, so as to define or form a gap 120 therebetween. The gap 120 is adjacent to the moving disk body 310 of the moving scroll 300, or rather, the gap 120 terminates at the moving disk body 310 in the axial direction XX', so that the gap 120 is defined by the axial surface of the moving disk body 310 facing away from the moving scroll body 320 in the axial direction XX', and the gap 120 is also in fluid communication with the proximal chamber 111. Further, the main shaft 430 is internally provided with a main shaft passage 431 which extends through the main shaft 430 and leads to the gap 120 and the distal chamber 112, so that the gap 120 and the distal chamber 112 can be in fluid communication with each other through the main shaft passage 431.

[0036] Under the above configuration, a low-temperature and low-pressure medium to be compressed (e.g., refrigerant) from outside the housing 100 can enter the distal chamber 112 through the air inlet hole 101. A part of the medium in the distal chamber 112 can enter the proximal chamber 111 through the air gap between the stator 410 and the rotor 420, the pole shoe gap in the stator core 411, etc. Another part of the medium in the distal chamber 112 can enter the gap 120 through the main shaft passage 430 in the main shaft 430, and then enter the proximal chamber 111 through the gap 120. The medium in the proximal chamber 111 will enter each working chamber from the periphery (i.e., radially outside) of the stationary scroll 200 and the orbiting scroll 300 for the compression process described above. Therefore, the above configuration divides the medium entering the housing 100 into two parts. One part flows through the stator 410 and the rotor 420 of the motor 400 before being compressed, and thus the stator 410 and the rotor 420 can be cooled by this part of the medium. The other part flows through the main shaft passage 431 of the main shaft 430 of the motor 400 and the gap 120 before being compressed, and thus the orbiting scroll 300 can be cooled by this part of the medium, and then the compressed medium in each working chamber can be cooled through the orbiting scroll 300. In particular, it is worth mentioning that the above configuration enables the medium flowing through the main shaft passage 431 to be free from being heated by the stator 410, thereby improving the ability of this part of the medium to cool the orbiting scroll 300 and the compressed medium in each working chamber, so that the compression process of the medium can be closer to an isothermal process. In summary, the above configuration according to the present disclosure enables a part of the uncompressed low-temperature and low-pressure medium to be used to cool the motor, thus providing the possibility to further increase the power of the motor, and also enables another part of the uncompressed low-temperature and low-pressure medium to be used to cool the compressed medium so as to make the compression process closer to an isothermal process, thereby reducing the energy consumption of the scroll compressor.

[0037] In particular, as Figure 1As shown, the main shaft 430 includes a proximal end 432 and a distal end 433 separated along the axial direction XX'. Among them, the proximal end 432 is close to the moving scroll 300, while the distal end 433 is far from the moving scroll 300. And the main shaft 430 is further provided with an eccentric pin 434 protruding from the proximal end 432. This eccentric pin 434 defines an axis parallel to the rotation axis of the main shaft 430 and offset relative to the rotation axis of the main shaft 430. That is to say, this eccentric pin 434 protrudes from the proximal end 432 along the axial direction XX' at an eccentric position. The scroll compressor 10 may further include an eccentric block (also referred to as an eccentric shaft) 510. Among them, the eccentric pin 434 of the main shaft 430 is inserted into the eccentric block 510 to connect the eccentric block 510 to the main shaft 430, and the eccentric block 510 also defines an axis parallel to the rotation axis of the main shaft 430 and offset relative to the rotation axis of the main shaft 430. In addition, the eccentric block 510 can be connected to the moving scroll 300 through a bearing 610. Specifically, the moving scroll 300 may be provided with an annular boss 330 at the distal side. Among them, the bearing 610 can be received in this annular boss 330, and the eccentric block 510 can be inserted into the bearing 610. In this configuration, the main shaft 430 is coupled to the moving scroll 300 through the eccentric pin 434, the eccentric block 510 and the bearing 610, so that the rotation of the main shaft 430 around the rotation axis can be converted into the revolution of the eccentric block 510 around the rotation axis, and the revolution of the eccentric block 510 around the rotation axis can be further converted into the revolution of the moving scroll 300 around the rotation axis.

[0038] In particular, as Figure 1 shown, the eccentric block 510 is spaced apart from the moving disk body 310 of the moving scroll 300 along the axial direction XX', so that a gap 120 is further defined between the moving disk body 310 and the eccentric block 510. And the main shaft passage 431 extends from the distal end 433 of the main shaft 430 to the end of the eccentric pin 434, and the eccentric pin 434 extends through the eccentric block 510, so that the main shaft passage 431 can lead to the gap 120 or can be in fluid communication with the gap 120. In addition, the eccentric block 510 also has a clearance fit with the bearing 610, so that the gap 120 can be in fluid communication with the proximal chamber 111 through the gap between the eccentric block 510 and the bearing 610. In this configuration, the medium in the distal chamber 112 can enter the main shaft passage 431 at the distal end 433 of the main shaft 430, and then be conveyed by the main shaft passage 431 to the gap 120. And the medium in the gap 120 can enter the proximal chamber 111 through the gap between the eccentric block 510 and the bearing 610 for the compression process. In particular, the main shaft passage 431 extends along a straight axial path so that the medium can flow more smoothly through the main shaft passage 431.

[0039] In particular, as Figure 1As shown, the scroll compressor 10 further includes a proximal cover 710 disposed within the internal chamber 110 (specifically, the proximal chamber 111). The proximal cover 710 is connected to the housing 100, thereby dividing the proximal chamber 111 into a first proximal chamber 111a that is remote from the stator 410 and rotor 420 of the motor 400 and a second proximal chamber 111b that is close to the stator 410 and rotor 420 of the motor 400. The proximal cover 710 is further provided with one or more proximal through-holes 711 that fluidly connect the first proximal chamber 111a and the second proximal chamber 111b. Of course, in this case, the first proximal chamber 111a houses the stationary scroll 200 and the orbiting scroll 300 and is fluidly connected to the clearance 120, and the main shaft 430 extends through the proximal cover 710. In particular, as a supplement or alternative to the above configuration, the scroll compressor 10 further includes a distal cover 720 disposed within the internal chamber 110 (specifically, the distal chamber 112). That is to say, the distal cover 720 and the proximal cover 710 are located on opposite sides of the stator 410 and rotor 420 of the motor 400 along the axial direction XX'. The distal cover 720 is also connected to the housing 100, thereby dividing the distal chamber 112 into a first distal chamber 112a that is close to the stator 410 and rotor 420 of the motor 400 and a second distal chamber 112b that is remote from the stator 410 and rotor 420 of the motor 400. Additionally, the distal cover 720 is further provided with one or more distal through-holes 721 that fluidly connect the first distal chamber 112a and the second distal chamber 112b, and the intake hole 101 in the housing 100 leads to the second distal chamber 112b, and the main shaft 430 extends through the distal cover 720 such that the main shaft passage 431 leads to the second distal chamber 112b.

[0040] Under the above configuration, the medium from outside the housing 100 can enter the second distal chamber 112b through the air inlet hole 101, and a part of the medium in the second distal chamber 112b can enter the first distal chamber 112a through the distal through hole 721, and another part of the medium in the second distal chamber 112b can enter the main shaft passage 431 at the distal end 433. Further, the medium in the first distal chamber 112a can enter the second proximal chamber 111b after passing through the stator 410 and the rotor 420, and then enter the first proximal chamber 111a through the proximal through hole 711, while the medium in the main shaft passage 431 can enter the gap 120 and then enter the first proximal chamber 111a through the gap 120. Thus, the uncompressed low-temperature and low-pressure medium can be used to cool both the moving scroll 300 and the motor 400. It is worth mentioning that the proximal cover 710 helps to block the heat generated by the motor 400 from entering the first proximal chamber 111a, thereby avoiding excessive temperature rise of the medium in the first proximal chamber 111a before being compressed, which helps to maintain the working efficiency of the scroll compressor 10, and the distal cover 720 helps to block the heat generated by the motor 400 from entering the second distal chamber 112b, thereby avoiding the medium in the second distal chamber 112b from being heated by the stator 410 before cooling the moving scroll 300, which helps to further improve the ability of the medium to cool the moving scroll 300 and the compressed medium in each working chamber, so that the compression process of the medium is closer to an isothermal process. Therefore, the proximal cover 710 and the distal cover 720 help to maintain the working efficiency of the scroll compressor 10 and ensure reliable heat dissipation of the moving scroll 300.

[0041] In particular, as Figure 1 shown, the proximal cover 710 can be provided with a proximal bearing 620 for supporting the main shaft 430, and the distal cover 720 can be provided with a distal bearing 630 for supporting the main shaft 430. Under this configuration, the proximal bearing 620 and the distal bearing 630 are spaced apart along the axial direction XX', so that the main shaft 430 can be reliably supported within the inner chamber 110. More particularly, the main shaft 430 has an interference fit with both the proximal bearing 620 and the distal bearing 630, and the proximal bearing 620 and the distal bearing 630 respectively have an interference fit with the proximal cover 710 and the distal cover 720, thereby suppressing the wobbling of the main shaft 430 and ensuring the stability of power transmission.

[0042] Referring to Figure 2 , which shows a schematic cross-sectional view of a scroll compressor according to another embodiment of the present disclosure. As Figure 2 shown, the stator 410 of the motor 400 includes a stator core 411 fixed to the housing 100 and a stator winding 412 attached to the stator core 411. Figure 2 The shown embodiment and Figure 1The difference of the illustrated embodiment is that a plurality of stator channels 413 are provided in the stator core 411, which are distributed along the circumferential direction (i.e., spaced apart from each other along the circumferential direction) and extend along the axial direction XX'. Each stator channel 413 extends through the stator core 411 along the axial direction XX', so that the proximal chamber 111 (the second proximal chamber 111b in the case where the proximal cover 710 exists) on one side of the stator core 411 can be in fluid communication with the distal chamber 112 on the other side of the stator core 411 along the axial direction XX' (the first distal chamber 112a in the case where the distal cover 720 exists). In this configuration, the medium in the distal chamber 112 can enter the proximal chamber 111 not only through the air gap between the stator 410 and the rotor 420, but also through each stator channel 413. Therefore, each stator channel 413 not only provides an additional path for the medium to flow from the distal chamber 112 to the proximal chamber 111, but also increases the contact area between the medium and the stator core 411, so as to further improve the heat dissipation of the stator core 411.

[0043] In particular, as Figure 2As shown, the stator core 411 has a radially outer surface adjacent to or in contact with the housing 100 and a radially inner surface facing the rotor 420. Each stator channel 413 is formed by a groove recessed from the radially outer surface of the stator core 411. Each groove extends from one end of the stator core 411 to the other end, so that the medium in the distal chamber 112 can flow between the stator core 410 and the housing 100 along each groove into the proximal chamber 111. In particular, the electric machine 400 may further include an isolation cylinder 440 that is positioned radially between the stator 410 and the rotor 420, that is, the isolation cylinder 440 is located radially inside the stator 410 and surrounds the rotor 420 radially outside the rotor 420, thereby isolating the rotor 420 from the stator 410 from each other. More particularly, when both the proximal cover 710 and the distal cover 720 are present, the two ends (i.e., the two axial ends) of the isolation cylinder 440 are respectively connected to the proximal cover 710 and the distal cover 720, so that the isolation cylinder 440 can isolate the rotor 420 from the stator 410 from each other, that is, can isolate the rotor 420 from the second proximal chamber 111b and the first distal chamber 112a from each other. In this configuration, the second proximal chamber 111b and the first distal chamber 112a are defined as two annular chambers located on both sides of the stator 410. The medium in the first distal chamber 112a can flow into the second proximal chamber 111b through each stator channel 413, and the isolation cylinder 440 can prevent the media in the second proximal chamber 111b and the first distal chamber 112a from contacting the rotor 420, thereby avoiding the media from increasing the rotational resistance of the rotor 420 and thus avoiding increasing the energy consumption of the scroll compressor 10. In particular, the isolation cylinder 440 can be spaced apart from both the stator 410 and the rotor 420, or the isolation cylinder 440 can be connected to the stator 410 (specifically, the radially outer surface of the isolation cylinder 440 can be attached to the stator core 411) and spaced apart from the rotor 420, thereby avoiding mutual wear between the rotor 420 and the isolation cylinder 440 and avoiding the isolation cylinder 440 from increasing the rotational resistance of the rotor 420.

[0044] Reference Figure 3 and Figure 4 , in which, Figure 3 shows a schematic cross-sectional view of a scroll compressor according to another embodiment of the present disclosure, Figure 4 shows a schematic partial cross-sectional view of the stator of the electric machine taken along line A-A in Figure 3 . As Figure 3 and Figure 4As shown, the stator core 411 is provided on its radially inner side with a plurality of winding grooves 414 that are distributed in the circumferential direction and extend along the axial direction XX'. Among them, each winding groove 414 is defined between two adjacent stator teeth 415 and extends along the axial direction XX' through the stator core 411, so that each winding groove 414 can provide an operating space for winding the wires of the stator winding 412 around the stator teeth 415, and can receive the wires of the stator winding 412 wound around the stator teeth 415, so that the stator winding 412 can be attached to the stator core 411 in this way. Figure 3 The difference between the embodiment shown and Figure 2 the embodiment shown is that the stator channel 413 is not formed by a groove provided on the radially outer surface of the stator core 411, but by the gap around the wires of the stator winding 412 in the winding groove 414. Since the wires wound around the stator teeth 415 cannot fill the entire winding groove 414 (that is, it is impossible to achieve a 100% slot fill factor), after the wires are wound around each stator tooth 415, there must be a gap around the wires in each winding groove 414, and this gap can allow the medium to pass through, so that the stator channel 413 can be formed, and thus there is no need to provide the stator channel 413 on the radially outer surface of the stator core 411. In this configuration, the medium in the distal chamber 112 can flow into the proximal chamber 111 through the stator channels 413 in the respective winding grooves 414, which enables the medium to directly contact the wires of the stator winding 412 in the respective winding grooves 414, thereby realizing direct in-slot cooling of these wires, and thus the heat dissipation of the stator winding 412 can be further improved. Of course, Figure 2 the embodiment shown and Figure 3 and Figure 4 the embodiment shown can be combined, that is, each groove on the radially outer surface of the stator core 411 forms a stator channel 413, and the gap around the wires in each winding groove 414 also forms a stator channel 413, so that a plurality of stator channels 413 are formed both on the radially outer side and the radially inner side of the stator core 411.

[0045] Referring to Figure 5 , which shows a schematic cross-sectional view of a scroll compressor according to still another embodiment of the present disclosure. Figure 5 The difference between the embodiment shown and Figure 4The difference in the illustrated embodiment is that the moving disk body 310 of the moving scroll disk 300 is provided with a disk body passage 311 inside, and the disk body passage 311 leads to the gap 120 and the proximal chamber 111 (the first proximal chamber 111a in the case where the proximal cover 710 exists), so that the gap 120 and the proximal chamber 111 can be in fluid communication with each other through the disk body passage 311. In this configuration, in addition to passing through the gap between the eccentric block 510 and the bearing 610, the medium in the gap 120 can also flow into the proximal chamber 111 through the disk body passage 311. In particular, the disk body passage 311 may have an axial branch 311a that leads to the axial surface of the moving disk body 310 (the gap 120 terminates at this axial surface in the axial direction XX') and extends along the axial direction XX', and a radial branch 311b that leads to the radial surface of the moving disk body 310 and extends along the radial direction. Among them, the axial branch 311a is in fluid communication with the gap 120, and the radial branch 311b is in fluid communication with the proximal chamber 111. In this configuration, the medium in the gap 120 can enter the axial branch 311a of the disk body passage 311, and then flow into the radial branch 311b, and then enter the proximal chamber 111 through the radial branch 311b. Therefore, the above configuration provides an additional path for the medium to flow from the gap 120 to the proximal chamber 111 through the disk body passage 311, and when flowing in the disk body passage 311, the medium can further cool the moving scroll disk 300, thereby further improving the heat dissipation of the moving scroll disk 300.

[0046] In particular, as Figures 1-3 and Figure 5 shown, the scroll compressor 10 may further include an inverter 800 for controlling the motor 400. The inverter 800 is attached to the outer surface of the housing 100 opposite to the distal chamber 112 (the second distal chamber 112b in the case where the distal cover 720 exists). That is to say, the distal chamber 112 and the inverter 800 are located inside and outside the same part of the housing 100. In this configuration, the uncompressed low-temperature and low-pressure medium in the distal chamber 112 can also cool the inverter 800 through the housing 100, thereby realizing reliable heat dissipation of the inverter 800.

[0047] The optional but non-limiting embodiments of the scroll compressor according to the present disclosure have been described in detail above with the aid of the drawings. For those ordinary technicians in the art, without departing from the spirit and essence of the present disclosure, modifications and supplements to the technology and structure, as well as the recombination of the features in each embodiment, should obviously be regarded as included within the scope of the present disclosure. Therefore, these modifications and supplements that can be conceived under the teaching of the present disclosure should be regarded as a part of the present disclosure. The scope of the present disclosure includes equivalent technologies known at the filing date of the present disclosure and equivalent technologies not yet foreseen.

Claims

1. A scroll compressor, characterized in that: The invention comprises a housing (100), and a fixed scroll (200), a movable scroll (300) and a motor (400) located in the housing (100). The motor (400) comprises a stator (410) fixed to the housing (100), a rotor (420) located radially inside the stator (410), and a main shaft (430) supporting the rotor (420); the housing (100) defines a proximal chamber (111) and a distal chamber (112) located on opposite sides of the stator (410) in the axial direction; the proximal chamber (111) accommodates the fixed scroll (200) and the movable scroll (300); and The main shaft (430) is internally provided with a main shaft channel (431) for connecting the distal chamber (112) with the proximal chamber (111), and the housing (100) is provided with an air inlet (101) leading to the distal chamber (112).

2. The scroll compressor according to claim 1, characterized in that: The movable scroll (300) is coupled to the fixed scroll (200) and the main shaft (430) on opposite sides along the axial direction, respectively. The movable scroll (300) is spaced apart from the main shaft (430) to form a gap (120) therebetween, and the gap (120) connects the proximal chamber (111) with the main shaft channel (431).

3. The scroll compressor according to claim 2, characterized in that: The main shaft (430) has a proximal end (432) and a distal end (433) opposite to each other in the axial direction and is provided with an eccentric pin (434) protruding from the proximal end (432) at an eccentric position, and the main shaft channel (431) extends from the distal end (433) to the end of the eccentric pin (434).

4. The scroll compressor according to claim 3, characterized in that: The invention also includes an eccentric block (510) and a bearing (610) connecting the eccentric block (510) to the movable scroll (300), wherein the eccentric pin (434) passes through the eccentric block (510) to eccentrically position the eccentric block (510) relative to the main shaft (430), and the gap (120) is located between the movable scroll (300) and the eccentric block (510).

5. The scroll compressor according to claim 4, characterized in that: The eccentric block (510) and the bearing (610) are clearance-matched.

6. The scroll compressor according to any one of claims 1 to 5, characterized in that: The main shaft channel (431) extends in the axial direction.

7. The scroll compressor according to any one of claims 1 to 5, characterized in that: The invention also includes a distal cover (720) which is located in the distal chamber (112) to separate it into a first distal chamber (112a) adjacent to the stator (410) and a second distal chamber (112b) connected to the air inlet (101), and a distal through hole (721) is provided to connect the first distal chamber (112a) with the second distal chamber (112b).

8. The scroll compressor according to claim 7, characterized in that: The main shaft (430) passes through the distal cover (720) so that the main shaft channel (431) connects the second distal chamber (112b) with the proximal chamber (111).

9. The scroll compressor according to claim 7, characterized in that: The invention also includes a proximal cover (710), which is located in the proximal chamber (111) to separate it into a first proximal chamber (111a) accommodating the fixed scroll (200) and the movable scroll (300) and a second proximal chamber (111b) adjacent to the stator (410), and is provided with a proximal through hole (711) connecting the first proximal chamber (111a) and the second proximal chamber (111b).

10. The scroll compressor according to claim 9, characterized in that: The proximal cover (710) is provided with a proximal bearing (620) for supporting the main shaft (430), and the distal cover (720) is provided with a distal bearing (630) for supporting the main shaft (430).

11. The scroll compressor according to any one of claims 1 to 5, characterized in that: The stator (410) comprises a stator core (411) fixed on the housing (100) and a stator winding (412) attached to the stator core (411); the stator core (411) is provided with a plurality of stator channels (413), and each stator channel (413) passes through the stator core (411) in the axial direction.

12. The scroll compressor according to claim 11, characterized in that: The stator core (411) has an outer surface adjacent to the housing (100), and each stator channel (413) is formed by a groove recessed from the outer surface of the stator core (411).

13. The scroll compressor according to claim 11, characterized in that: The stator core (411) is provided with a plurality of winding slots (414) for receiving the conducting wires of the stator winding (412). Each stator channel (413) is formed by a gap around the wire in each winding slot (414).

14. The scroll compressor according to any one of claims 1 to 5, characterized in that: The motor (400) further comprises an isolating cylinder (440), wherein the isolating cylinder (440) is located between the stator (410) and the rotor (420) so as to isolate the stator (410) and the rotor (420) from each other.

15. The scroll compressor according to any one of claims 2 to 5, characterized in that: The movable scroll (300) is provided with a scroll body channel (311) inside thereof, which connects the gap (120) with the proximal chamber (111).

16. The scroll compressor according to claim 15, characterized in that: The disc channel (311) has an axial branch (311a) extending in the axial direction and opening into the gap (120) and a radial branch (311b) extending in the radial direction and opening into the proximal chamber (111).

17. The scroll compressor according to any one of claims 1 to 5, characterized in that: An inverter (800) for controlling the motor (400) is also included, and the inverter (800) is attached to an outer surface of the housing (100) opposite to the distal chamber (112).

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