Structure for reducing noise and improving sound quality of electric scroll compressor

Abstract

The invention discloses a structure for reducing noise and improving sound quality of an electric scroll compressor. The structure can reduce pump body working noise and exhaust pulsation noise of the electric scroll compressor. Comprising a movable disc and a static disc, the static disc is provided with a static disc molded line tooth head face, a static disc molded line tooth top face and a static disc molded line tooth tail face which are continuously spiral from inside to outside, and the heights of the static disc molded line tooth head face and the static disc molded line tooth tail face are gradually reduced relative to the static disc molded line tooth top face to form inclined faces. The movable disc is provided with a movable disc molded line tooth head surface, a movable disc molded line tooth top surface and a movable disc molded line tooth tail surface which are continuously spiral from inside to outside, and the heights of the movable disc molded line tooth head surface and the movable disc molded line tooth tail surface are gradually reduced relative to the movable disc molded line tooth top surface respectively to form inclined surfaces; the static disc molded line tooth head face, the static disc molded line tooth top face and the static disc molded line tooth tail face are attached to the movable disc to form a friction pair, and the movable disc molded line tooth head face, the movable disc molded line tooth top face and the movable disc molded line tooth tail face are attached to the static disc to form a friction pair.

Description

Technical Field

[0001] The invention relates to the technical field of electric scroll compressors, and in particular to a structure for reducing noise and improving sound quality of an electric scroll compressor. Background Art

[0002] At present, electric scroll compressors have become the core components of air conditioning and refrigeration for new energy electric vehicles. The cooling effect, noise and vibration of the whole vehicle are the most direct feelings of driving comfort, and a more optimized structure is needed to improve the performance of the compressor. The scroll compressor forms two pairs of suction, compression and exhaust working chambers through the meshing of the profiles on the moving and static disks, and forms a sealed working chamber through the sealing of the profile top surface, profile bottom surface and profile side with lubricating oil. Through the rotary motion of the moving disk, the compressor compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas through the working process of suction, compression and exhaust, and discharges it into the high-pressure exhaust chamber, and then transports it to the air conditioning system through the exhaust channel. In this process, multiple groups of friction pairs are formed, such as the top surface of the moving disc profile and the bottom surface of the static disc profile, the top surface of the static disc profile and the bottom surface of the moving disc profile, the radial surface of the moving disc profile and the radial surface of the static disc profile, the back of the moving disc and the wear-resistant pad. When these friction pairs are excited, friction noise will be generated. The smaller the friction coefficient of the friction pair is, the smaller the noise generated is, and vice versa, the greater the noise generated is. Different materials of the friction pairs will produce different sounds. At the same time, the moving disc not only revolves around the center of the eccentric shaft, but also rotates around the center of the eccentric pin. This rotation will cause the moving disc and the static disc to collide and generate noise, as well as cause the vibration of the pump body, which will stimulate the above-mentioned friction pairs to generate friction noise. The high-pressure exhaust chamber at the top of the static disc buffers the energy of the gas discharged from the pump body. The gas pressure fluctuation therein will cause exhaust pulsation noise during exhaust.

[0003] Therefore, a simple, reliable, easy-to-process and assemble structure is selected to reduce pump body vibration, reduce the friction coefficient or material structure of the friction pair, reduce exhaust pulsation, effectively reduce the noise generated by the compressor, and make the sound quality purer, thereby solving the user complaints caused by the discomfort caused by noise and sound quality when users use air conditioning in the car, and improving product performance. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a structure for reducing noise and improving sound quality of an electric scroll compressor, which can reduce the pump body operating noise and exhaust pulsation noise of the electric scroll compressor.

[0005] The object of the present invention is achieved in that:

[0006] A structure for reducing noise and improving sound quality of an electric scroll compressor comprises a moving disk 4 and a static disk 3 of the electric scroll compressor, wherein the static disk 3 has a static disk profile line tooth head surface 203, a static disk profile line tooth top surface 205, and a static disk profile line tooth tail surface 204 which are continuously spirally formed from the inside to the outside, wherein the static disk profile line tooth head surface 203 and the static disk profile line tooth tail surface 204 are gradually reduced in height relative to the static disk profile line tooth top surface 205 to form an inclined surface, and the moving disk 4 has a moving disk profile line tooth head surface 203 which is continuously spirally formed from the inside to the outside. 06, moving disc profile tooth top surface 208, moving disc profile tooth tail surface 207, the moving disc profile tooth head surface 206, the moving disc profile tooth tail surface 207 are gradually lowered relative to the moving disc profile tooth top surface 208 to form an inclined surface, the static disc profile tooth head surface 203, the static disc profile tooth top surface 205, the static disc profile tooth tail surface 204 are fitted with the moving disc 4 to form a friction pair, the moving disc profile tooth head surface 206, the moving disc profile tooth top surface 208, the moving disc profile tooth tail surface 207 are fitted with the static disc 3 to form a friction pair.

[0007] Preferably, the surface of the static disk 3 corresponding to the profile of the dynamic disk is electroplated with a tin-plated film layer 501, and the surface of the dynamic disk 4 corresponding to the profile of the static disk is vacuum ion-plated with an amorphous diamond film layer 502. The friction coefficient of the friction pair is reduced, the wear resistance of the friction pair surface is improved, and the friction noise is reduced.

[0008] Preferably, the end cover 1 of the electric scroll compressor is also included, the end cover 1 is arranged on the top of the static disk 3, the end cover 1 has a high-pressure exhaust chamber 101, and the tooth head surface 206 of the moving disk also has an exhaust chamber connecting groove 306 at the tooth top of the profile line, and the exhaust chamber connecting groove 306 is connected with the high-pressure exhaust chamber 101. When the exhaust of the first exhaust chamber of the two exhaust chambers of the pump body is completed, the second exhaust chamber is opened in advance to avoid over-compression of the gas in the first exhaust chamber, balance the exhaust pressure in the two exhaust chambers, and reduce the gas pulsation in the high-pressure exhaust chamber 11.

[0009] Preferably, the large end of the end cover 1 has a first cavity 106, and the small end of the end cover 1 has a second cavity 105. A stepped partition plate 201 is provided at the lower part of the second cavity 105. The stepped partition plate 201 is high at one end and low at the other end. The stepped partition plate 201 divides the second cavity 105 into two cavities. The stepped partition plate 201 separates the lubricating oil and the refrigerant gas. The end cover 1 has an oil collecting cavity, and an oil inlet is provided on the stator plate. The stepped partition plate 201 prevents the refrigerant gas from flowing through the oil collecting cavity of the end cover 1 into the oil inlet on the stator plate and outflowing to the low-pressure cavity of the compressor through the back pressure cavity, thereby reducing the air flow pulsation caused by gas loss caused by the reflux of gas in the high-pressure cavity, thereby preventing the pressure pulsation in the high-pressure exhaust cavity from generating exhaust pulsation noise.

[0010] The above structure optimizes the size of the back pressure throttle hole 307 of the moving plate and the size of the throttle hole 301 of the static plate. Through multiple throttling, the oil circuit pressure tends to a more stable set target value, making the back pressure on the moving plate 4 more stable and the follow-up performance better, thereby reducing the friction control force of the moving plate 4, reducing energy consumption and noise. Reduce the assembly and material costs of the original throttle valve

[0011] Preferably, the invention further comprises a bearing seat of the electric scroll compressor, wherein the end face 202 of the bearing seat is a plane, and the center of the end face 202 of the bearing seat also has an inner cavity 112, and six evenly distributed circular anti-rotation pin holes 113 are provided on the outer edge of the inner cavity 112, and the centers of the six circular anti-rotation pin holes 113 are located on the center circle 402 of the anti-rotation pin holes, and the back of the moving plate is provided with a moving plate inner cavity 109, and six evenly distributed step-circle anti-rotation ring holes 111 are provided on the end face of the moving plate inner cavity 109, and the centers of the six anti-rotation ring holes 111 are located on the center circle 401 of the anti-rotation ring holes, and the circumferential diameter of the center circle 402 of the anti-rotation pin holes of the bearing seat is equal to the circumferential diameter of the center circle 401 of the anti-rotation ring holes;

[0012] The six anti-rotation rings 5 ​​are respectively placed in the six step-circle anti-rotation ring holes 111 on the back of the moving disk, and the six anti-rotation pins 12 are respectively pressed into the six anti-rotation pin holes 113 of the bearing seat 9. The outer circumferential surfaces of the anti-rotation pins 12 are tangent to the corresponding inner circumferential surfaces of the anti-rotation rings 5. When the compressor is working, the anti-rotation pins 12 respectively move in a circular motion along the inner circumferential surfaces of the wear-resistant rings 5 ​​where they are located and are always tangent. The anti-rotation pins 12 on the bearing seat 9 and the anti-rotation rings 5 ​​in the anti-rotation ring holes 111 installed on the moving disk 4 form an anti-rotation mechanism of a column pin structure, which prevents the moving disk 4 from rotating and colliding with the static disk 3 to produce abnormal noise;

[0013] Preferably, a wear-resistant pad 10 is provided on the end face 202 of the bearing seat, and an O-shaped rubber ring 6 and a moving plate shock-absorbing ring 7 are provided between the moving plate 4 and the wear-resistant pad 10. The O-shaped rubber ring 6 and the moving plate shock-absorbing ring 7 have a vibration absorption effect, which can reduce the vibration of the moving plate 4 caused by the uneven gas force in the working chamber; the moving plate shock-absorbing ring 7 separates the contact between the moving plate 4 and the wear-resistant pad, changes the metal contact between the friction pair, and reduces the sound generated by the moving plate 4 from high frequency to low sound.

[0014] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0015] The structure is simple and reliable, easy to assemble, and easier to achieve lightweight design of the whole machine; by optimizing the size of the back pressure hole on the moving plate and the size of the throttle hole on the static plate, the back pressure on the moving plate is more stable and the follow-up performance is better; the O-shaped rubber ring and the shock-absorbing ring between the moving plate and the wear-resistant pad have a vibration absorption effect, which slows down the vibration of the moving plate; the back pressure chamber structure allows the gas therein to form an air bag, which is equivalent to an elastic system, which can slow down the vibration and reduce the noise caused by the vibration, and can absorb the deflection caused by the operation of the balance block in the back pressure chamber; the materials between the meshing surface of the moving plate and the static plate, and the friction pair between the back of the moving plate and the wear-resistant pad are changed, which changes the sharp and harsh friction sound caused by metal friction; the anti-rotation mechanism of the pin structure is simple and reliable in structure, which prevents the moving plate from rotating and colliding with the static plate to produce abnormal noise; the coating material of the meshing surface of the moving and static plates is changed to tin plating for the static plate and amorphous diamond plating for the surface of the moving plate The stone film reduces the friction coefficient and increases the wear resistance of the moving plate; the inclined surface of the tooth head of the moving and static disk gradually decreases from the top surface height to avoid abnormal friction noise caused by severe wear at this place due to thermal expansion deformation; the inclined surface of the tooth tail of the moving and static disk gradually decreases from the top surface height to avoid abnormal noise caused by the collision of the tooth tail caused by the vibration of the moving plate; the stepped baffle plate arranged at the bottom of the end cover separates the lubricating oil and the refrigerant gas, reduces the refrigerant gas flowing out of the low-pressure cavity through the oil inlet on the static disk to cause the pressure pulsation in the high-pressure exhaust cavity to generate exhaust pulsation noise; through the above structure, the vibration of the compressor moving plate is reduced under different working conditions, the friction coefficient of each moving friction pair is reduced, the material structure of each moving friction pair is improved, and various abnormal noises are reduced, so that the vibration of the compressor is small, the noise is low, the energy consumption is small, and the service life is longer, thereby improving the performance of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0017] Figure 1 It is an exploded view of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0018] Figure 2 It is an assembly diagram of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0019] Figure 3 It is a three-dimensional diagram of an end cover of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0020] Figure 4 It is a top view of a stator disk of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0021] Figure 5It is a cross-sectional development diagram of a stator disk of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0022] Figure 6 It is a front view of a stator disk of a structure for reducing noise and improving sound quality of an electric scroll compressor according to the present invention;

[0023] Figure 7 It is a top view of a moving disk of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0024] Figure 8 It is a bottom view of a moving disk of a structure for reducing noise and improving sound quality of an electric scroll compressor of the present invention;

[0025] Fig. 9 It is a front view of a bearing seat of a structure for reducing noise and improving sound quality of an electric scroll compressor according to the present invention.

[0026] Reference numerals

[0027] In the attached drawings, 1-end cover, 2-exhaust chamber sealing ring, 3-static plate, 4-moving plate, 5-anti-rotation ring, 6-O-shaped rubber ring, 7-moving plate damping ring, 8-rotating shaft, 9-bearing seat, 10-wear-resistant pad, 11-bearing seat oil seal, 12-anti-rotation pin, 13-balance block, 14-moving plate bearing, 101-high-pressure exhaust chamber, 102-low-pressure chamber, 103-working chamber, 104-back pressure chamber, 105-second chamber, 106-first chamber, 107-upper chamber, 108-lower chamber, 109-moving plate inner chamber, 110-moving plate bearing hole, 111-anti-rotation ring hole, 112-inner chamber 113-anti-rotation pin hole, 201-step partition , 202-bearing seat end face, 203-static disc profile tooth head face, 204-static disc profile tooth tail face, 205-static disc profile tooth top face, 206-moving disc profile tooth head face, 207-moving disc profile tooth tail face, 208-moving disc profile tooth top face, 301-static disc throttle hole, 302-exhaust chamber sealing groove, 303-oil inlet channel entrance, 304-oil inlet channel, 305-oil outlet channel, 306-exhaust chamber ventilation groove, 307-moving disc back pressure throttle hole, 308-shock-absorbing annular groove, 309-moving disc back pressure hole, 401-anti-rotation ring hole center circle, 402-anti-rotation pin hole center circle, 501-electroplated tin film layer, 502-amorphous diamond film layer. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention. The applicant's previous application for patent 202410166878.6 has not completely solved the problems in the prior art, and this patent application is further improved.

[0029] See also Figures 1 to 8 The present invention provides a structure for reducing noise and improving sound quality of an electric scroll compressor, comprising a moving plate 4, a stationary plate 3, a bearing seat 9, a wear-resistant pad 10, a rotating shaft 8, a bearing seat oil seal 11, an exhaust chamber sealing ring 2, an end cover 1, a moving plate damping ring 7, an O-shaped rubber ring 6, an anti-rotation ring 5, an anti-rotation pin 12, a moving plate bearing 14, and a balancing block 13. The end cover 1 is arranged on the top of the stationary plate 3, and the exhaust chamber sealing ring 2, the stationary plate 3, the moving plate 4, the O-shaped rubber ring 6, the moving plate damping ring 7, the wear-resistant pad 10, the moving plate bearing 14, the eccentric block 13, the bearing seat 9, the bearing seat oil seal 11 and the rotating shaft 8 are connected in sequence.

[0030] The end cover 1 has a first cavity 106, the stator plate 2 also has an upper cavity 107 and a lower cavity 108, the bearing seat 9 has an inner cavity 112, the first cavity 106 and the upper cavity 107 form a high-pressure exhaust cavity 101, the high-pressure exhaust cavity 101 is sealed by the exhaust cavity sealing ring 2, the lower cavity 108 and the wear-resistant pad 10 form a working cavity 103, the moving plate 4 and the stator plate 3 are meshed with each other and are located inside the working cavity 103, and the lower end of the inner cavity 112 is sealed by the bearing seat oil seal ring 2. The seal 11 is connected and sealed with the rotating shaft 8, the upper end of the inner cavity 112 is sealed through the wear-resistant pad 10 and the moving disc 4 to form a back pressure cavity 104, the moving disc 4 and the wear-resistant pad 10 are provided with the O-ring 6 and the moving disc damping ring 7, the eccentric block 13 is located at the upper end of the rotating shaft 8 and is connected through an eccentric pin, the moving disc bearing 14 is located at the upper end of the eccentric block 13 and cooperates with the moving disc bearing hole 110, the end cover 1 also has a second cavity 105, and the second cavity 105 is communicated with the inner cavity of the outer shell to form a low pressure cavity 102.

[0031] The static plate 3 also has an oil inlet channel 304 and an oil outlet channel 305, which are connected to the back pressure chamber 104 through the annular oil channel on the wear-resistant pad 10 and the oil channel of the bearing seat 9. The inlet 303 of the oil inlet channel is located at the lower end of the upper cavity 107 and is connected to the high-pressure exhaust chamber 101. The static plate oil outlet channel 305 is composed of stepped holes from small to large. The throttle hole 301 of the oil outlet channel is located on the upper end surface of the static plate 3 and is connected to the first cavity 106 and the low-pressure chamber 102. The moving plate 4 also has a stepped hole as a back pressure hole 309. The small hole is located on the front of the moving plate, and the large hole is located on the back of the moving plate, connecting the compression chamber and the back pressure chamber 104 of the pump body.

[0032] The end face 202 of the bearing seat is a plane, and also has an inner cavity 112 in the center. On the outer edge of the inner cavity 112 on the plane, there are six evenly distributed circular anti-rotation pin holes 113, and the centers of the six circular anti-rotation pin holes 113 are located on the anti-rotation pin hole center circle 402. A moving disk inner cavity 109 is provided on the back side of the moving disk, and six evenly distributed stepped anti-rotation ring holes 111 are provided on the end face of the moving disk inner cavity 109, and the centers of the six anti-rotation ring holes 111 are located on the anti-rotation ring hole center circle 401. The circumferential diameter of the anti-rotation pin hole center circle 402 of the bearing seat is equal to the circumferential diameter of the anti-rotation ring hole center circle 401.

[0033] The wear-resistant pad 10 is placed on the end face 202 of the bearing seat, the six anti-rotation rings 5 ​​are respectively placed in the six stepped anti-rotation ring holes 111 on the back of the moving plate, the six anti-rotation pins 12 are respectively pressed into the six anti-rotation pin holes 113 of the bearing seat 9, and the outer cylindrical surfaces of the anti-rotation pins 12 are respectively tangent to the corresponding inner cylindrical surfaces of the anti-rotation rings 5. When the compressor is working, the anti-rotation pins 12 respectively make circular motions along the inner cylindrical surfaces of the wear-resistant rings 5 ​​where they are located and are always tangent.

[0034] The moving plate 4 has a shock-absorbing annular groove 308, and the O-ring 6 and the moving plate shock-absorbing ring 7 are located in the shock-absorbing annular groove 308. After assembly, the O-ring 6 and the moving plate shock-absorbing ring 7 are higher than the shock-absorbing annular groove 308, and the total height from the top surface of the moving plate 4 profile to the bottom surface of the moving plate shock-absorbing ring 7 is higher than the depth of the lower cavity 108 of the static plate.

[0035] The static disk 3 has a static disk profile tooth head surface 203, a static disk profile tooth top surface 205, and a static disk profile tooth tail surface 204. The static disk profile tooth head surface 203 and the static disk profile tooth tail surface 204 are inclined surfaces whose heights are gradually reduced from the static disk profile tooth top surface 205. The dynamic disk 4 has a dynamic disk profile tooth head surface 206, a dynamic disk profile tooth top surface 208, and the dynamic disk profile tooth tail surface 207. The dynamic disk profile tooth head surface 206 and the dynamic disk profile tooth tail surface 207 of the dynamic disk 4 are inclined surfaces whose heights are gradually reduced from the dynamic disk profile tooth top surface 208. At the same time, the dynamic disk 4 also has an exhaust cavity connecting groove 306 at the profile tooth top.

[0036] The friction pair material of the meshing surface of the moving disk 4 and the static disk 3 is that the surface of the moving disk line end adopts the vacuum ion plating process, and a layer of TAC-ZJ (amorphous diamond film 502) thin film layer is attached, and the surface of the static disk line end adopts the electroplating tin process, and a layer of electroplated tin film layer 501 is attached.

[0037] The end cover 1 further has a stepped partition 201 at the lower part of the second cavity 105 . The stepped partition 201 is higher on the left and lower on the right, dividing the second cavity 105 of the end cover into two upper and lower cavities.

[0038] The above structure optimizes the size of the back pressure throttle hole 307 of the moving plate and the size of the throttle hole 301 of the static plate, so that the back pressure on the moving plate 4 is more stable and the follow-up performance is better, thereby reducing the friction control force of the moving plate 4, reducing energy consumption and noise; the O-shaped rubber ring 6 and the moving plate damping ring 7 between the moving plate 4 and the wear-resistant pad 10 have a vibration absorption effect, which can reduce the vibration of the moving plate 4 caused by the uneven gas force in the working chamber; the moving plate damping ring 7 separates the contact between the moving plate 4 and the wear-resistant pad, changes the metal contact between the friction pair, and reduces the sound produced by the high frequency to the low sound; the back pressure chamber 104 structure makes the gas therein form an air bag, which is equivalent to An elastic system can slow down vibration and reduce the noise caused by vibration, and can absorb the deflection caused by the operation of the balance block 13 in the back pressure chamber 104; the anti-rotation mechanism of the column pin structure is formed by the anti-rotation pin 12 on the bearing seat 9 and the anti-rotation ring 5 in the anti-rotation ring hole 111 installed on the moving plate 4. The structure is simple and reliable, which prevents the moving plate 4 from rotating and colliding with the static plate 3 to produce abnormal noise; the static plate is a surface electroplated tin film layer 501 with a certain hardness and smoothness, which can reduce the friction and wear between the moving plate 4 and play a wear-resistant and lubricating role; the surface of the moving plate 4 is an amorphous diamond film layer 502, which has low-temperature deposition, ultra-high hardness, and ultra- Strong adhesion, low friction coefficient, stable chemical properties, wear resistance, dry lubrication and other characteristics extend the life of parts, improve the performance of moving parts, reduce motion friction noise, and change the sharp and harsh friction sound produced by metal friction; the static disk profile tooth head surface 203 and the dynamic disk profile tooth head surface 206 gradually decrease in height from the top surface, avoiding the abnormal friction noise caused by the interference wear between this place and the bottom surface of the profile due to thermal expansion deformation; the static disk profile tooth tail surface 204 and the dynamic disk profile tooth tail surface 207 gradually decrease in height from the top surface to avoid the abnormal noise caused by the collision of the profile tooth tail due to the vibration of the dynamic disk 4; the step set at the bottom of the end cover 1 The partition 201 separates the lubricating oil and the refrigerant gas, preventing the refrigerant gas from flowing into the oil inlet on the stator through the oil collecting chamber of the end cover 1 and flowing out to the low-pressure chamber of the compressor through the back pressure chamber, thereby reducing the air flow pulsation caused by the gas loss caused by the backflow of gas in the high-pressure chamber, and thus preventing the pressure pulsation in the high-pressure exhaust chamber from generating exhaust pulsation noise. Through the above structure, the vibration of the compressor moving plate is reduced under different working conditions, the friction coefficient of each moving friction pair is reduced, the material structure of each moving friction pair is improved, and various abnormal noises are reduced, so that the vibration of the compressor is small, the noise is low, the energy consumption is small, and the service life is longer during operation, thereby improving the performance of the compressor.

[0039] The present invention reduces the working noise of the pump body and the exhaust pulsation noise, optimizes the size of the back pressure throttle hole of the dynamic and static disks, makes the dynamic disk run more smoothly, adds a vibration-absorbing rubber ring and an anti-rotation mechanism on the back of the dynamic disk to slow down the vibration of the dynamic disk, and arranges a new surface film layer with a small friction coefficient and wear resistance on the surfaces of the dynamic and static disks, thereby reducing the friction noise generated by the meshing of the dynamic and static disks; the end cover is arranged on the top of the static disk, and the isolation baffle plate arranged at the lower part of the end cover prevents the gas from flowing back to the low-pressure chamber through the oil return channel, plays a pressure stabilizing role for the gas discharged from the working pump body, and reduces the airflow pulsation noise generated by the operation of the compressor; planes with gradually decreasing heights are added to the tooth heads and tails of the dynamic and static disk profiles to prevent the interference of the motion caused by the increase of the profile height due to thermal expansion, and the interference of the profile tail caused by the unstable operation of the dynamic disk, which aggravates the noise generated by the operation of the dynamic and static disks. The invention solves the friction noise generated by the compressor pump body during operation, the collision noise generated by the unstable operation of the moving plate, and the gas pulsation noise generated by the unstable exhaust pressure in the prior art, so that the noise generated by the compressor during operation is small and the sound quality is pure, thereby solving the user complaints caused by the discomfort caused by noise and sound quality when users use air conditioning in their cars, and improving the product performance.

[0040] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A structure for reducing noise and improving sound quality of an electric scroll compressor, comprising a moving plate and a stationary plate of the electric scroll compressor, characterized in that: The static disk has a static disk profile line tooth head surface, a static disk profile line tooth top surface, and a static disk profile line tooth tail surface that are continuously spiral from the inside to the outside. The static disk profile line tooth head surface and the static disk profile line tooth tail surface are gradually reduced relative to the static disk profile line tooth top surface to form an inclined surface. The dynamic disk has a dynamic disk profile line tooth head surface, a dynamic disk profile line tooth top surface, and a dynamic disk profile line tooth tail surface that are continuously spiral from the inside to the outside. The dynamic disk profile line tooth head surface and the dynamic disk profile line tooth tail surface are gradually reduced relative to the dynamic disk profile line tooth top surface to form an inclined surface. The static disk profile line tooth head surface, the static disk profile line tooth top surface, and the static disk profile line tooth tail surface are bonded to the dynamic disk to form a friction pair. The dynamic disk profile line tooth head surface, the dynamic disk profile line tooth top surface, and the dynamic disk profile line tooth tail surface are bonded to the static disk to form a friction pair.

2. According to claim 1, a structure for reducing noise and improving sound quality of an electric scroll compressor is characterized in that: The surface of the static disk corresponding to the moving disk profile line adopts the electroplating tin process to attach a layer of electroplated tin film, and the surface of the moving disk corresponding to the static disk profile line adopts the vacuum ion plating process to attach a layer of amorphous diamond film.

3. According to claim 1, a structure for reducing noise and improving sound quality of an electric scroll compressor is characterized in that: It also includes an end cover of the electric scroll compressor, which is arranged on the top of the stator disk. The end cover has a high-pressure exhaust chamber. The tooth head surface of the moving disk also has an exhaust chamber connecting groove at the tooth top of the profile line. The exhaust chamber connecting groove is connected to the high-pressure exhaust chamber.

4. The structure for reducing noise and improving sound quality of an electric scroll compressor according to claim 3, characterized in that: The large end of the end cover has a first cavity, the small end of the end cover has a second cavity, and the lower part of the second cavity is provided with a stepped partition, one end of the stepped partition is high and the other end is low, the stepped partition divides the second cavity into two cavities, the stepped partition separates the lubricating oil and the refrigerant gas, the end cover has an oil collecting cavity, and an oil inlet is provided on the stator plate. The stepped partition prevents the refrigerant gas from flowing into the oil inlet on the stator plate through the oil collecting cavity of the end cover, and then flowing out to the low-pressure cavity of the compressor through the back pressure cavity, thereby reducing the air flow pulsation caused by gas loss due to the reflux of gas in the high-pressure cavity, thereby preventing the pressure pulsation in the high-pressure exhaust cavity from generating exhaust pulsation noise.

5. The structure for reducing noise and improving sound quality of an electric scroll compressor according to claim 1, characterized in that: It also includes a bearing seat of an electric scroll compressor, the end face of the bearing seat is a plane, the center of the end face of the bearing seat also has an inner cavity, and six evenly distributed circular anti-rotation pin holes are provided on the outer edge of the inner cavity, and the centers of the six circular anti-rotation pin holes are located on the center circle of the anti-rotation pin holes, the back of the moving plate is provided with a moving plate inner cavity, and six evenly distributed step circle anti-rotation ring holes are provided on the end face of the moving plate inner cavity, and the centers of the six anti-rotation ring holes are located on the center circle of the anti-rotation ring holes, and the circumferential diameter of the center circle of the anti-rotation pin holes of the bearing seat is equal to the circumferential diameter of the center circle of the anti-rotation ring holes; The six anti-rotation rings are respectively placed in the six stepped anti-rotation ring holes on the back of the moving disk, the six anti-rotation pins are respectively pressed into the six anti-rotation pin holes of the bearing seat, the outer cylindrical surfaces of the anti-rotation pins are respectively tangent to the corresponding inner cylindrical surfaces of the anti-rotation rings, when the compressor is working, the anti-rotation pins respectively move in a circular motion along the inner cylindrical surfaces of the wear-resistant rings where they are located and are always tangent, the anti-rotation mechanism of the column pin structure is formed by the anti-rotation pins on the bearing seat and the anti-rotation rings in the anti-rotation ring holes installed on the moving disk, thereby preventing the moving disk from rotating and colliding with the static disk to produce abnormal noise.

6. The structure for reducing noise and improving sound quality of an electric scroll compressor according to claim 5, characterized in that: A wear-resistant pad is provided on the end face of the bearing seat, and an O-shaped rubber ring and a moving plate shock-absorbing ring are provided between the moving plate and the wear-resistant pad. The O-shaped rubber ring and the moving plate shock-absorbing ring have a vibration absorption effect, and can reduce the vibration of the moving plate caused by the unbalanced gas force in the working chamber; the moving plate shock-absorbing ring separates the contact between the moving plate and the wear-resistant pad, changes the metal contact between the friction pair, and reduces the sound generated by the moving plate from high frequency to low sound.

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