Scroll compressor and air conditioning device

Abstract

The invention relates to the technical field of compressors, and provides a scroll compressor and an air conditioning device. The scroll compressor comprises a shell, a static scroll plate arranged in the shell, a dynamic scroll plate meshed with the static scroll plate, and a driving plate capable of driving the dynamic scroll plate to translate relative to the static scroll plate, the movable scroll plate can float relative to the driving plate in the axial direction of the movable scroll plate, and the shell, the static scroll plate, the movable scroll plate and the driving plate jointly define a back pressure cavity. The static scroll plate is provided with a first channel, and when the movable scroll plate is far away from the static scroll plate in the axial direction of the movable scroll plate, the first channel can communicate the exhaust cavity with the back pressure cavity, so that gas in the exhaust cavity enters the back pressure cavity through the first channel, and the movable scroll plate can get close to the static scroll plate in the axial direction of the movable scroll plate. According to the scroll compressor, gas leakage between the cavities between the movable scroll plate and the static scroll plate can be reduced, and the compression efficiency of the scroll compressor can be improved.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and in particular to a scroll compressor and an air conditioning device. Background Technology

[0002] A scroll compressor is a positive displacement compressor. When a scroll compressor is running, the chamber between the moving scroll and the stationary scroll compresses low-temperature, low-pressure gas into high-temperature, high-pressure gas through a variable volume operation, and then supplies the high-temperature, high-pressure gas to the outside.

[0003] During the operation of a scroll compressor, there is a pressure difference between the chamber containing high-pressure gas between the moving scroll and the stationary scroll and the chamber on the back of the moving scroll. The existence of this pressure difference creates an axial gas force between the moving scroll and the stationary scroll. This gas force will push the moving scroll, causing the moving scroll and the stationary scroll to tend to separate, thereby increasing the gap between them and increasing gas leakage between the chambers. Obviously, this is not conducive to improving the compression efficiency of the scroll compressor. Summary of the Invention

[0004] In view of this, this application aims to provide a scroll compressor to improve the compression efficiency of the scroll compressor.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0006] A scroll compressor includes a housing, a stationary scroll disk disposed within the housing, a moving scroll disk meshing with the stationary scroll disk, and a drive disk capable of driving the moving scroll disk to translate relative to the stationary scroll disk.

[0007] The moving scroll disk can float relative to the driving disk along its own axis, and the housing, the stationary scroll disk, the moving scroll disk and the driving disk together form a back pressure cavity;

[0008] The stationary vortex disk is provided with a first channel. When the moving vortex disk is away from the stationary vortex disk along its own axis, the first channel can connect the exhaust chamber and the back pressure chamber, so that the gas in the exhaust chamber enters the back pressure chamber through the first channel, so that the moving vortex disk can approach the stationary vortex disk along its own axis.

[0009] Furthermore, a first sealing part is provided between the moving scroll disk and the driving disk to seal the gap between them. The first sealing part is annular, and the back pressure chamber includes a first pressure chamber located inside the first sealing part.

[0010] The moving scroll disk is provided with a second channel, which connects the first pressure chamber and the exhaust chamber.

[0011] Furthermore, a second sealing part is provided between the moving scroll disk and the driving disk to seal the gap between them, and the second sealing part is arranged around the first sealing part;

[0012] The back pressure chamber includes a second pressure chamber disposed between the first sealing part and the second sealing part, and a third pressure chamber located outside the second sealing part;

[0013] The drive disk is provided with a third channel, which connects the second pressure chamber to the third pressure chamber; the first channel is connected to the third pressure chamber.

[0014] Furthermore, a third sealing part is provided between the moving scroll disk and the driving disk to seal the gap between them, and the third sealing part is arranged between the second sealing part and the first sealing part;

[0015] The second pressure chamber includes a second inner pressure chamber located between the first sealing part and the third sealing part, and a second outer pressure chamber located between the second sealing part and the third sealing part;

[0016] The third channel is connected to the second inner pressure chamber, and the moving vortex disk is provided with a fourth channel, which connects the second outer pressure chamber and the intake chamber.

[0017] Furthermore, the drive disk is provided with a receiving cavity for accommodating the eccentric sleeve, the receiving cavity is connected to the air intake cavity, and the drive disk is provided with a fifth channel, the fifth channel connecting the second internal pressure cavity and the receiving cavity.

[0018] Furthermore, a fourth pressure chamber is formed between the stationary vortex disk and the housing, and the fourth pressure chamber connects the exhaust chamber to the external exhaust pipe; a sixth channel is provided between the stationary vortex disk and the housing, through which lubricating oil can enter the third pressure chamber from the fourth pressure chamber.

[0019] Furthermore, the housing includes a support portion for supporting the drive disk, and the drive disk has a wear-resistant plate on the side facing away from the stationary vortex disk;

[0020] The drive disk abuts against the bearing portion via the wear-resistant plate, and the wear-resistant plate moves relative to the bearing portion with the moving scroll disk.

[0021] Furthermore, the housing includes a housing body, the supporting part includes a thrust ring embedded in the housing body, and a fourth sealing part is provided between the thrust ring and the housing body to seal the gap between them.

[0022] Furthermore, a first sealing strip is embedded in the profile of the moving scroll plate, which can seal the gap between the profile of the moving scroll plate and the plate body of the stationary scroll plate.

[0023] Furthermore, a second sealing strip is embedded in the profile of the stationary scroll plate, which can seal the gap between the profile of the stationary scroll plate and the plate body of the moving scroll plate.

[0024] Furthermore, the housing is provided with a limiting part; the drive disk and the moving scroll disk are connected by a connector, and the connector is provided with a limiting engagement part;

[0025] The partial embedding of the limiting part into the limiting part can restrict the translational movement of the drive disk and the moving scroll disk relative to the housing.

[0026] Compared with related technologies, this application has the following advantages:

[0027] (1) The scroll compressor described in this application is configured with a drive disk that allows the moving scroll disk to float relative to each other. At the same time, a back pressure chamber is provided, and a first channel that connects the exhaust chamber and the back pressure chamber is arranged. In this way, when the axial gas pressure between the moving scroll disk and the stationary scroll disk is too high and a gap is generated, the first channel can transport the high-pressure gas in the exhaust chamber to the back pressure chamber. After the high-pressure gas enters the back pressure chamber, the gas pressure increases, and the gas can push the moving scroll disk closer to the stationary scroll disk until the moving scroll disk and the stationary scroll disk re-contact each other, thereby achieving a sealing effect and reducing gas leakage between the chambers. This is beneficial to improving the compression efficiency of the scroll compressor.

[0028] (2) By using the first sealing part to separate the first pressure chamber from the back pressure chamber, and by connecting the exhaust chamber to the first pressure chamber through the second channel, the high pressure gas in the exhaust chamber can be continuously introduced into the first pressure chamber carrying lubricating oil, so that the position of the moving scroll plate corresponding to the wall of the first pressure chamber is subjected to gas pressure, and the moving scroll plate tends to move towards the stationary scroll plate, which is beneficial to maintaining the sealing state between the moving scroll plate and the stationary scroll plate.

[0029] (3) The second pressure chamber and the third pressure chamber are separated by setting a second sealing part. At the same time, a third channel is set to connect the second pressure chamber and the third pressure chamber. After the high pressure gas enters the third pressure chamber from the first channel, it needs to pass through the third channel before entering the second pressure chamber. Finally, it acts on the moving scroll plate to form a pressure buffer, so as to prevent the back pressure of the moving scroll plate from responding too sensitively and violently to the change of the pressure in the exhaust chamber. This makes the floating of the moving scroll plate more stable, reduces oscillation and impact, and is conducive to the stability and reliability of operation.

[0030] (4) A third sealing part is provided to subdivide the second pressure chamber into a second inner pressure chamber and a second outer pressure chamber. At the same time, a fourth channel is arranged to connect the second outer pressure chamber with the low-pressure suction chamber. A low-pressure zone can be formed in the area of ​​the second outer pressure chamber. Under the simultaneous action of the air pressure in the second outer pressure chamber and the air pressure in the suction chamber, the moving scroll plate is subjected to a force toward the stationary scroll plate, which is beneficial to balancing the force on the moving scroll plate without excessively pressing the stationary scroll plate, and also beneficial to the flow of lubricating oil.

[0031] (5) Arranging a fifth channel connecting the receiving cavity and the second internal pressure cavity allows the gas in the second internal pressure cavity to carry the lubricating oil into the receiving cavity through the fifth channel, thereby increasing the air pressure on the side of the drive disk facing away from the moving scroll disk, reducing the pressure between the drive disk and the housing, and thus reducing wear; setting a fourth pressure cavity connecting the exhaust cavity and the external exhaust pipe can temporarily store and buffer the high-pressure gas discharged from the exhaust cavity, making the gas input to the external exhaust pipe more stable; at the same time, setting a sixth channel connecting the fourth pressure cavity and the third pressure cavity can provide a lubricating oil flow channel, which is beneficial to the circulation of lubricating oil.

[0032] (6) A bearing part and a wear-resistant plate are provided. When the drive disk moves relative to the housing, the wear-resistant plate rubs against the bearing part, replacing the friction between the drive disk and the housing. This can reduce the friction coefficient and wear during the translation process, which is beneficial to improving the life of the drive disk and the housing. At the same time, the wear-resistant plate and the bearing part are independent components, and can be replaced separately after wear, which reduces maintenance costs.

[0033] (7) A fourth sealing part is provided between the thrust ring and the shell body, which can enhance the sealing effect between the thrust ring and the shell body and improve the sealing performance of the back pressure cavity.

[0034] (8) The first sealing strip embedded in the profile of the moving scroll plate and the second sealing strip embedded in the profile of the stationary scroll plate can effectively fill the tiny radial gap between the moving scroll plate and the stationary scroll plate, preventing the gas in each chamber between the moving scroll plate and the stationary scroll plate from leaking from the high-pressure side to the low-pressure side through the radial gap, which is beneficial to improving the working efficiency of the scroll compressor. At the same time, in the early stage of operation of the scroll compressor, the sealing strip may have some initial wear to better fit the stationary scroll plate, which is beneficial to maintaining a good sealing state.

[0035] (9) A limiting fit part is provided on the connecting part that connects the drive disk and the moving scroll disk, and a limiting part is provided on the housing. This can increase the function of the connecting part and reduce the number of parts of the scroll compressor.

[0036] Another object of this application is to provide an air conditioning device comprising the aforementioned scroll compressor.

[0037] The air conditioning device described in this application, by employing the aforementioned scroll compressor, allows the moving scroll and stationary scroll to float and adhere tightly to the stationary scroll when a gap is generated between them. This is achieved by increasing the air pressure on the side of the moving scroll facing away from the stationary scroll, thereby reducing gas leakage between the chambers and improving the compression efficiency of the scroll compressor. Consequently, the air conditioning device achieves a higher energy efficiency ratio and saves operating energy consumption. Furthermore, the drive disc is located on the back side of the moving scroll, preventing it from contacting the housing and thus avoiding wear. This also reduces the likelihood of damage to the moving scroll and extends the service life of the air conditioning device. Attached Figure Description

[0038] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0039] Figure 1 This is a schematic diagram of the overall structure of the scroll compressor described in the embodiments of this application;

[0040] Figure 2 This is an exploded view of the scroll compressor described in the embodiments of this application;

[0041] Figure 3 This is a right view of the scroll compressor described in the embodiment of this application;

[0042] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0043] Figure 5 for Figure 3 Cross-sectional view along the BB direction;

[0044] Figure 6 for Figure 3 A cross-sectional view along the CC direction;

[0045] Figure 7 for Figure 3 A cross-sectional view along the DD direction;

[0046] Figure 8 This is a schematic diagram of the structure of the moving scroll disk described in the embodiments of this application;

[0047] Figure 9 This is a schematic diagram of the drive disk structure described in an embodiment of this application;

[0048] Figure 10 This is a schematic diagram of the static vortex disk described in the embodiments of this application;

[0049] Figure 11 This is a schematic diagram showing the arrangement of the back pressure valve described in the embodiments of this application;

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Shell; 101. Supporting part; 102. Shell body; 1021. Front shell; 1022. Middle shell; 1023. Air inlet; 103. Limiting part; 104. Rear cover; 105. Oil filling hole;

[0052] 2. Static vortex disk; 201. First channel; 202. Sixth channel; 203. Seventh channel; 204. Oil hole; 205. Eighth channel;

[0053] 3. Moving scroll plate; 301. Second channel; 302. Fourth channel; 303. First groove; 304. Second groove;

[0054] 4. Drive plate; 401. First boss; 402. Sealing groove; 403. Third channel; 404. Receiving cavity; 405. Fifth channel; 406. Second boss;

[0055] 5. First sealing part;

[0056] 6. Second sealing part;

[0057] 7. Third sealing part;

[0058] 8. Wear-resistant sheets;

[0059] 9. Fourth sealing part;

[0060] 10. First sealing strip;

[0061] 11. Second sealing strip;

[0062] 12. Connecting parts; 1201. Limiting and fitting parts;

[0063] 13. Back pressure valve;

[0064] 14. Back pressure tablet;

[0065] 15. Eccentric shaft;

[0066] 16. Eccentric sleeve;

[0067] a. Intake chamber; b. Compression chamber; c. Exhaust chamber; d1. First pressure chamber; d2. Second pressure chamber; d21. Second internal pressure chamber; d22. Second external pressure chamber; d3. Third pressure chamber; d4. Fourth pressure chamber. Detailed Implementation

[0068] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0069] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0070] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0071] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0072] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0074] An embodiment of the first aspect of this application provides a scroll compressor to improve the compression efficiency of the scroll compressor.

[0075] A scroll compressor is a positive displacement compressor, which consists of a moving scroll and a stationary scroll with a dual-function equation profile that mesh with each other. The profile of the moving scroll fits the body of the stationary scroll, and the profile of the stationary scroll fits the body of the moving scroll, so that multiple chambers are formed between the moving scroll and the stationary scroll.

[0076] In a scroll compressor, the stationary scroll plate is fixed, while the moving scroll plate, driven by an eccentric shaft and constrained by an anti-rotation mechanism, rotates in a plane around the base circle of the stationary scroll plate with a very small radius. External gas enters the periphery of the stationary scroll plate, and as the eccentric shaft rotates, the gas is gradually compressed within several crescent-shaped compression chambers formed by the meshing of the moving and stationary scroll plates, and then continuously discharged through the axial hole at the center of the stationary scroll plate.

[0077] When the scroll compressor is running, the chamber between the moving scroll and the stationary scroll compresses the low-temperature, low-pressure gas into a high-temperature, high-pressure gas through the effect of variable volume, and then supplies the high-temperature, high-pressure gas to the outside.

[0078] During the operation of a scroll compressor, there is a pressure difference between the chamber containing high-pressure gas between the moving scroll and the stationary scroll and the chamber on the back of the moving scroll. The existence of this pressure difference creates an axial gas force between the moving scroll and the stationary scroll. This gas force will push the moving scroll, causing the moving scroll and the stationary scroll to tend to separate, thereby increasing the gap between them and increasing gas leakage between the chambers. Obviously, this is not conducive to improving the compression efficiency of the scroll compressor.

[0079] In view of this, in order to overcome the shortcomings of the related technology, the scroll compressor in this embodiment combines... Figures 1 to 7 In terms of content and overall design, it includes a housing 1, a stationary scroll 2 disposed in the housing 1, a moving scroll 3 meshing with the stationary scroll 2, and a drive disk 4 capable of driving the moving scroll 3 to translate relative to the stationary scroll 2.

[0080] The moving scroll disk 3 can float relative to the driving disk 4 along its own axis. The housing 1, the stationary scroll disk 2, the moving scroll disk 3, and the driving disk 4 together form a back pressure chamber. The stationary scroll disk 2 is provided with a first channel 201. When the moving scroll disk 3 is away from the stationary scroll disk 2 along its own axis, the first channel 201 can connect the exhaust chamber c and the back pressure chamber, so that the gas in the exhaust chamber c enters the back pressure chamber through the first channel 201, so that the moving scroll disk 3 can approach the stationary scroll disk 2 along its own axis.

[0081] Therefore, by setting a drive disk 4 and enabling the moving scroll disk 3 to float relative to each other, and simultaneously setting a back pressure chamber and arranging a first channel 201 that connects the exhaust chamber c and the back pressure chamber, the first channel 201 can transport the high-pressure gas in the exhaust chamber c to the back pressure chamber when the axial gas pressure between the moving scroll disk 3 and the stationary scroll disk 2 is too high and a gap is generated. After the high-pressure gas enters the back pressure chamber, the gas pressure increases, and the gas can push the moving scroll disk 3 closer to the stationary scroll disk 2, automatically compensating for the axial gap until the moving scroll disk 3 and the stationary scroll disk 2 re-contact, thereby achieving a sealing effect and reducing gas leakage between the chambers, which is beneficial to improving the compression efficiency of the scroll compressor.

[0082] Meanwhile, the drive disc 4 is located on the back side of the moving scroll disc 3, which prevents the back side of the moving scroll disc 3 from contacting the housing 1 and thus avoids corresponding wear. The moving scroll disc 3 is not easily damaged, thereby extending the service life of the scroll compressor.

[0083] Based on the above general introduction, specifically, the drive disk 4, the moving scroll disk 3, and the stationary scroll disk 2 are arranged in sequence. The front side of the drive disk 4 and the moving scroll disk 3 refers to the side of them facing the stationary scroll disk 2, while the back side refers to the side of them facing away from the stationary scroll disk 2.

[0084] Regarding the power source of the drive disk 4, for example, it can be driven by an eccentric shaft 15. The eccentric shaft 15 is driven by a motor. Under the drive of the eccentric shaft 15, the drive disk 4 can perform a rotary translational motion around the output shaft of the motor. The moving scroll disk 3 moves accordingly. There will be an intake chamber a, a compression chamber b, and an exhaust chamber c between the moving scroll disk 3 and the stationary scroll disk 2. The intake chamber a is a chamber used to draw in external gas. After the gas enters the intake chamber a, it will enter the compression chamber b as the moving scroll disk 3 moves. The compression chamber b is a chamber that compresses the volume of the gas. The low temperature and low pressure gas becomes a high temperature and high pressure gas in the compression chamber b. With the continued translation of the moving scroll disk 3, the high temperature and high pressure gas will enter the exhaust chamber c and exit from between the moving scroll disk 3 and the stationary scroll disk 2 through the exhaust chamber c.

[0085] During the operation of the scroll compressor, the overall discharge pressure changes with the operating conditions, and the back pressure of the gas in the back pressure chamber on the moving scroll 3 is automatically adjusted accordingly. Under high load and high pressure ratio conditions, the gas pressure in the back pressure chamber increases, which helps maintain the seal between the moving scroll 3 and the stationary scroll 2. Under low load conditions, the gas pressure in the back pressure chamber is relatively small, and the back pressure is also small. The pressure between the moving scroll 3 and the stationary scroll 2 will not be too large, and the sliding friction between them is small, which helps reduce energy loss and makes it easier for the scroll compressor to maintain high efficiency.

[0086] Continue to combine Figures 1 to 7 As shown, in some exemplary embodiments, a first sealing portion 5 is provided between the moving scroll plate 3 and the drive plate 4 to seal the gap between them. The first sealing portion 5 is annular, and the back pressure chamber includes a first pressure chamber d1 located inside the first sealing portion 5. A second channel 301 is provided on the moving scroll plate 3, which connects the first pressure chamber d1 and the exhaust chamber c.

[0087] In this embodiment, the first sealing part 5 separates the back pressure chamber into a first pressure chamber d1, and the second channel 301 connects the exhaust chamber c to the first pressure chamber d1. This allows high-pressure gas from the exhaust chamber c to be continuously introduced into the first pressure chamber d1, causing the position of the moving scroll 3 corresponding to the wall of the first pressure chamber d1 to be subjected to gas pressure. The moving scroll 3 tends to move towards the stationary scroll 2, which helps maintain the sealing state between the moving scroll 3 and the stationary scroll 2. The high-pressure gas in the exhaust chamber c can also carry lubricating oil into the first pressure chamber d1, which is beneficial for the diffusion lubrication effect of the lubricating oil.

[0088] For example, refer to Figures 2 to 10 The first sealing part 5 can be, for example, in the form of an O-ring. Simultaneously, a concentric first boss 401 is provided on the driving disk 4, protruding towards the stationary scroll disk 2. The first sealing part 5 is fitted onto the first boss 401. A first groove 303 is provided on the moving scroll disk 3. The first boss 401 and the first sealing part 5 simultaneously penetrate into the first groove 303. The driving disk 4 and the moving scroll disk 3 axially compress the first sealing part 5 to achieve a seal. The inner side of the first sealing part 5 is the first pressure chamber d1. The second channel 301 can be in the form of a through hole on the moving scroll disk 3. Correspondingly, the inlet of the first channel 201 can be located at the head of the profile of the stationary scroll disk 2, that is, at the starting end of the middle of the profile of the stationary scroll disk 2. When the profile of the stationary scroll disk 2 fits against the disk body of the moving scroll disk 3, the inlet of the first channel 201 is blocked. The outlet of the first channel 201 is located on the outside of the first sealing part 5.

[0089] Of course, the first channel 201 can also be set on the moving scroll plate 3. The inlet of the first channel 201 is set at the head of the profile of the moving scroll plate 3, and the outlet of the first channel 201 is set on the outer circumferential wall of the moving scroll plate 3. After a gap is generated between the moving scroll plate 3 and the stationary scroll plate 2, the high pressure gas in the exhaust chamber c can also be introduced into the outer chamber of the first sealing part 5 through the first channel 201 to achieve the back pressure increase of the moving scroll plate 3.

[0090] Continue to refer to Figures 2 to 10 As shown, in some exemplary embodiments, in addition to the first sealing part 5, a second sealing part 6 is provided between the moving scroll plate 3 and the drive plate 4 to seal the gap between them, and the second sealing part 6 is arranged around the first sealing part 5. The back pressure chamber includes a second pressure chamber d2 disposed between the first sealing part 5 and the second sealing part 6, and a third pressure chamber d3 located outside the second sealing part 6. The drive plate 4 is provided with a third channel 403, which connects the second pressure chamber d2 and the third pressure chamber d3, and the first channel 201 connects to the third pressure chamber d3.

[0091] With this configuration, the second sealing part 6 separates the second pressure chamber d2 and the third pressure chamber d3. At the same time, a third channel 403 is provided to connect the second pressure chamber d2 and the third pressure chamber d3. This means that after the high-pressure gas enters the third pressure chamber d3 from the first channel 201, it must pass through the third channel 403 before entering the second pressure chamber d2. Finally, it acts on the moving scroll plate 3, which can form a pressure buffer to prevent the back pressure of the moving scroll plate 3 from responding too sensitively and drastically to changes in the pressure of the exhaust chamber c. This makes the floating of the moving scroll plate 3 more stable, reduces oscillation and impact, and helps to improve the stability and reliability of the scroll compressor operation.

[0092] In this embodiment, the second sealing part 6 may be an O-ring, for example. The front surface of the drive disk 4 is provided with an annular sealing groove 402. The second sealing part 6 is embedded in the sealing groove 402 and protrudes from the opening of the sealing groove 402. The second sealing part 6 is axially pressed between the drive disk 4 and the moving scroll disk 3 to achieve sealing.

[0093] It should be noted that, in order to ensure that the back pressure of the moving scroll plate 3 is greater than the front pressure, the projected area of ​​the first pressure chamber d1 on the moving scroll plate 3 is basically equal to the projected area of ​​the exhaust chamber c on the moving scroll plate 3, the projected area of ​​the second pressure chamber d2 on the moving scroll plate 3 is basically equal to the projected area of ​​the compression chamber b on the moving scroll plate 3, and the projected area of ​​the third pressure chamber d3 on the moving scroll plate 3 is basically equal to the projected area of ​​the intake chamber a on the moving scroll plate 3.

[0094] Reference Figures 2 to 9 As shown, in some exemplary embodiments, in addition to the second sealing part 6, a third sealing part 7 is provided between the moving scroll plate 3 and the drive plate 4 to seal the gap between them. The third sealing part 7 is arranged between the second sealing part 6 and the first sealing part 5. The second pressure chamber d2 includes a second inner pressure chamber d21 located between the first sealing part 5 and the third sealing part 7, and a second outer pressure chamber d22 located between the second sealing part 6 and the third sealing part 7. A third channel 403 communicates with the second inner pressure chamber d21, and a fourth channel 302 is provided on the moving scroll plate 3, which communicates the second outer pressure chamber d22 and the intake chamber a.

[0095] In this way, by setting the third sealing part 7, the second pressure chamber d2 is subdivided into the second inner pressure chamber d21 and the second outer pressure chamber d22. At the same time, the fourth channel 302 is arranged to connect the second outer pressure chamber d22 with the low-pressure suction chamber a. A low-pressure zone can be formed in the area of ​​the second outer pressure chamber d22. Under the simultaneous action of the air pressure in the second outer pressure chamber d22 and the air pressure in the suction chamber a, the moving scroll 3 is subjected to a force toward the stationary scroll 2. This helps to balance the force on the moving scroll 3 without excessively pressing the stationary scroll 2. It also facilitates the flow and diffusion of lubricating oil and improves the lubrication effect.

[0096] In the above embodiment, the third sealing part 7 can be, for example, in the form of an O-ring. A concentric second boss 406 is provided on the drive disk 4, protruding towards the stationary scroll disk 2. The third sealing part 7 is fitted onto the second boss 406. A second groove 304 is provided on the moving scroll disk 3. The second boss 406 and the third sealing part 7 are simultaneously inserted into the second groove 304. The drive disk 4 and the moving scroll disk 3 axially compress the third sealing part 7 to achieve a seal. The fourth channel 302 can be in the form of a through hole on the moving scroll disk 3. In order to increase the lubricating oil storage capacity between the drive disk 4 and the moving scroll disk 3, a recessed structure can be provided at the position corresponding to the fourth channel 302 to increase the lubricating oil storage space.

[0097] Furthermore, based on the provision of the third sealing part 7, in some exemplary embodiments, the drive disk 4 is provided with a receiving cavity 404 for accommodating the eccentric sleeve 16, the receiving cavity 404 is connected to the air intake cavity a, and the drive disk 4 is provided with a fifth channel 405, the fifth channel 405 connecting the second internal pressure cavity d21 and the receiving cavity 404.

[0098] With the above configuration, the fifth channel 405 connecting the receiving cavity 404 and the second internal pressure cavity d21 allows gas from the second internal pressure cavity d21 to enter the receiving cavity 404 through the fifth channel 405. This increases the air pressure on the side of the drive disk 4 facing away from the moving scroll disk 3, reduces the pressure between the drive disk 4 and the housing 1, and thus reduces wear. The gas from the second internal pressure cavity d21 can also carry lubricating oil into the receiving cavity 404. The lubricating oil lubricates the bearing assembly at the eccentric sleeve 16 and the eccentric shaft 15, improving the smoothness of rotation of the eccentric shaft 15.

[0099] Continuing with the provision of a third sealing part 7, in some exemplary embodiments, a fourth pressure chamber d4 is formed between the stationary vortex disk 2 and the housing 1, and the fourth pressure chamber d4 connects the exhaust chamber c to an external exhaust pipe. A sixth channel 202 is provided between the stationary vortex disk 2 and the housing 1, through which lubricating oil can enter the third pressure chamber d3 from the fourth pressure chamber d4.

[0100] In this way, the fourth pressure chamber d4, which connects the exhaust chamber c and the external exhaust pipe, can temporarily store and buffer the high-pressure gas discharged from the exhaust chamber c, making the gas input to the external exhaust pipe more stable. At the same time, the sixth channel 202, which connects the fourth pressure chamber d4 and the third pressure chamber d3, can provide a channel for the flow of lubricating oil, which is beneficial to the circulation of lubricating oil.

[0101] Specifically, a seventh channel 203 can be provided on the stationary scroll plate 2. One end of the seventh channel 203 is connected to the exhaust chamber c, and the other end is connected to the fourth pressure chamber d4. It can be in the form of a through hole. A back pressure valve 13 is provided at the outlet of the seventh channel 203 on the stationary scroll plate 2. The back pressure valve 13 can only be opened after the gas pressure in the fourth pressure chamber d4 reaches a predetermined value, so as to ensure that the gas pressure entering the exhaust chamber c through the seventh channel 203 reaches the required level. An exhaust port is provided on the housing 1. The exhaust port is connected to the fourth pressure chamber d4 and extends out of the housing 1, forming an interface for connecting the scroll compressor with the external exhaust pipeline.

[0102] It should be noted that two eighth channels 205 can also be set on the static vortex disk 2. The eighth channel 205 connects the fourth pressure chamber d4 and the compression chamber b, and a back pressure valve 13 is provided at the connection to the fourth pressure chamber d4. Under some special working conditions, the difference between the gas pressure in the intake chamber a and the required gas pressure is small. After the gas is compressed, the gas pressure in the exhaust chamber c may be too high, resulting in wasted power. Setting the eighth channel 205 and the back pressure valve 13 can allow the gas in the compression chamber b that has reached the required gas pressure to directly enter the fourth pressure chamber d4, which helps to reduce the waste of kinetic energy.

[0103] For the sixth channel 202, refer to... Figure 2 , Figure 4 and Figure 11 For example, a back pressure plate 14 can be provided between the stationary vortex disk 2 and the housing 1. The back pressure plate 14 is a thin metal plate, and after being deformed by the joint compression of the stationary vortex disk 2 and the housing 1, it can block the sixth channel 202, preventing gas from passing through. However, there is still an extremely narrow gap, and the lubricating oil with high viscosity can slowly pass through the sixth channel 202 under the action of surface tension, pressure difference, and centrifugal force, completing the return flow of the lubricating oil. Preferably, an oil hole 204 can be provided on the stationary vortex disk 2. The oil hole 204 connects the aforementioned extremely narrow gap and the third pressure chamber d3, so that the lubricating oil at the back pressure plate 14 can return to the third pressure chamber d3 through the oil hole 204.

[0104] See Figure 2 , Figures 4 to 7 As shown, in some exemplary embodiments, the housing 1 includes a support portion 101 that supports the drive disk 4, and the drive disk 4 has a wear-resistant plate 8 on the side facing away from the stationary scroll disk 2. The drive disk 4 abuts against the support portion 101 through the wear-resistant plate 8, and the wear-resistant plate 8 moves relative to the support portion 101 with the scroll disk 3.

[0105] With the above configuration, when the drive disk 4 translates relative to the housing 1, the wear-resistant plate 8 rubs against the support part 101, replacing the friction between the drive disk 4 and the housing 1. This reduces the coefficient of friction and wear during translation, thus improving the lifespan of the drive disk 4 and the housing 1. Furthermore, as independent components, the wear-resistant plate 8 and the support part 101 can be replaced separately after wear, reducing maintenance costs. Additionally, the drive disk 4 has a much lower temperature than the moving scroll disk 3. The wear-resistant plate 8, located on the drive disk 4, is less likely to come into contact with high temperatures, thus maintaining its wear resistance.

[0106] Based on the housing 1 including the support portion 101, in some exemplary embodiments, the housing 1 includes a housing body 102, the support portion 101 includes a thrust ring embedded in the housing body 102, and a fourth sealing portion 9 is provided between the thrust ring and the housing body 102 to seal the gap between them. Providing the fourth sealing portion 9 between the thrust ring and the housing body 102 can enhance the sealing effect between the thrust ring and the housing body 102, and improve the sealing performance of the back pressure cavity.

[0107] For example, the housing 1 may include a housing body 102 and a rear cover 104. A space is formed between the housing body 102 and the rear cover 104 to accommodate the drive disk 4, the moving scroll disk 3, and the stationary scroll disk 2. An eccentric sleeve 16 is disposed in this space and passes through the receiving cavity 404 of the drive disk 4. Furthermore, the housing body 102 also includes a front shell 1021 and a middle shell 1022. The housing 1 can be fixed by using bolts to pass through the rear cover 104 and the middle shell 1022 in sequence and then fastening them to the front shell 1021. The middle shell 1022 is provided with an air inlet 1023 for gas to enter the intake chamber a after passing through the middle shell 1022 body 1.

[0108] The thrust ring is embedded in the middle shell 1022 and protrudes from the middle shell 1022 to contact the wear-resistant plate 8, preventing the drive disk 4 from directly contacting the housing 1. The thrust ring can be made of materials such as polyphenylene sulfide, polytetrafluoroethylene, or polyetheretherketone. The wear-resistant plate 8 can be made of materials such as polytetrafluoroethylene, polyetheretherketone, or polyimide, which helps reduce NVH (Noise, Vibration, and Harshness). It is important to note that to avoid mutual wear between plastics of the same material, the thrust ring and the wear-resistant plate 8 should be made of different materials to optimize their wear relationship and improve their service life.

[0109] Secondly, the middle shell 1022 is also provided with an oil injection hole 105. One end of the oil injection hole 105 is connected to the third pressure chamber d3, and the other end extends outward through the middle shell 1022 for injecting lubricating oil into the third pressure chamber d3 from the outside. Preferably, two oil injection holes 105 can be provided on the middle shell 1022.

[0110] Reference Figure 2 , Figure 4 and Figure 10 In some exemplary embodiments, a first sealing strip 10 is embedded in the profile of the moving scroll 3, which can seal the gap between the profile of the moving scroll 3 and the disk body of the stationary scroll 2.

[0111] As configured above, the first sealing strip 10 embedded in the profile of the moving scroll plate 3 can effectively fill the tiny radial gap between the profile of the moving scroll plate 3 and the plate body of the stationary scroll plate 2, preventing gas from leaking from the high-pressure side to the low-pressure side through the radial gap between the chambers of the moving scroll plate 3 and the stationary scroll plate 2, which is beneficial to improving the working efficiency of the scroll compressor. At the same time, in the initial stage of operation of the scroll compressor, the first sealing strip 10 may experience some initial wear to better fit the plate body of the stationary scroll plate 2, which helps to maintain a good sealing condition.

[0112] The specific material of the first sealing strip 10 can be, for example, polyphenylene sulfide, polytetrafluoroethylene, polyetheretherketone, etc., which have a low coefficient of friction and superior mechanical strength, thus improving the sealing effect.

[0113] continue Figure 2 , Figure 4 and Figure 10 In some exemplary embodiments, a second sealing strip 11 is embedded in the profile of the stationary scroll 2, which can seal the gap between the profile of the stationary scroll 2 and the disk body of the moving scroll 3.

[0114] This arrangement allows the second sealing strip 11, embedded in the profile of the stationary scroll plate 2, to effectively fill the minute radial gap between the profile of the stationary scroll plate 2 and the body of the moving scroll plate 3. This prevents gas from leaking from the high-pressure side to the low-pressure side through the radial gap between the chambers of the moving scroll plate 3 and the stationary scroll plate 2, thus improving the operating efficiency of the scroll compressor. Simultaneously, during the initial operation of the scroll compressor, the second sealing strip 11 may experience some initial wear to better conform to the body of the moving scroll plate 3, which helps maintain a good sealing condition.

[0115] The specific material of the second sealing strip 11 can be, for example, polyphenylene sulfide, polytetrafluoroethylene, polyetheretherketone, etc., which have a low coefficient of friction and superior mechanical strength. All three materials have good sealing effects.

[0116] Furthermore, regarding the limiting structure for the translational motion of the drive disk 4 and the moving scroll disk 3, see [link to relevant documentation]. Figure 2In some exemplary embodiments, the housing 1 is provided with a limiting part 103. The drive disk 4 and the moving scroll disk 3 are connected by a connector 12, which is provided with a limiting engagement part 1201. The limiting engagement part 1201 is partially embedded in the limiting part 103, which can limit the translational movement of the drive disk 4 and the moving scroll disk 3 relative to the housing 1.

[0117] In this way, by setting a limiting engagement part 1201 on the connecting part 12 that connects the drive disk 4 and the moving scroll disk 3, and setting a limiting part 103 on the housing 1, the functionality of the connecting part 12 can be increased, making it multi-functional, reducing the number of parts in the scroll compressor, and reducing the difficulty of maintenance.

[0118] For example, the limiting part 103 can be in the form of a circular groove, and the connecting part 12 can be in the form of a pin. One end of the pin is inserted into the moving scroll plate 3, and the other end is a limiting fitting part 1201. The limiting fitting part 1201 passes through the driving plate 4 and the wear-resistant plate 8 in sequence and is embedded in the groove. When the driving plate 4 moves horizontally, the pin slides along the inner circumferential wall of the groove, preventing the driving plate 4 from rotating. The relative positions of the moving scroll plate 3 and the pin are fixed, and they can float together along the axial direction. The number of sets of the limiting part 103 and the limiting fitting part 1201 should be at least two sets, for example, two sets, four sets, six sets, seven sets, eight sets, etc.

[0119] It is worth noting that, regarding the scroll compressor of this embodiment, based on the above exemplary embodiments, in specific implementation, as a preferred embodiment, it is still composed of... Figures 1 to 11 As shown, for example, it may include a housing 1, which includes a front housing 1021, a middle housing 1022 and a rear cover 104 connected in sequence. A drive disk 4, a moving scroll disk 3 and a stationary scroll disk 2 are provided between the middle housing 1022 and the rear cover 104. The moving scroll disk 3 is driven by the drive disk 4 and meshes with the stationary scroll disk 2.

[0120] The front housing 1021 contains a motor, the output shaft of which is connected to an eccentric shaft 15. An eccentric sleeve 16 on the eccentric shaft 15 is connected to a drive disk 4. A moving scroll disk 3 is connected to the drive disk 4 via a pin, and the moving scroll disk 3 can float axially relative to the drive disk 4.

[0121] Among them, a thrust ring is embedded on the middle shell 1022, and a wear-resistant plate 8 is provided on the back side of the drive disk 4. The wear-resistant plate 8 is in frictional contact with the thrust ring.

[0122] The stationary vortex disk 2 is fixedly connected to the rear cover 104 by a pin. The stationary vortex disk 2 and the rear cover 104 form a fourth pressure chamber d4 for storing compressed gas. The fourth pressure chamber d4 can be connected to the external exhaust pipe.

[0123] Among them, three O-rings are arranged coaxially from the inside to the outside in the gap between the moving scroll plate 3 and the stationary scroll plate 2. The O-rings seal between the moving scroll plate 3 and the stationary scroll plate 2 and separate multiple pressure chambers. Multiple channels are provided between each pressure chamber, the intake chamber a, the compression chamber b, the exhaust chamber c and the fourth pressure chamber d4, so that the pressure on the back side of the moving scroll plate 3 is greater than the pressure on the front side, and the moving scroll plate 3 is not easy to detach from the stationary scroll plate 2.

[0124] In the preferred embodiment of the housing 1 above, the specific configuration and arrangement of the housing 1, drive disk 4, moving scroll disk 3 and stationary scroll disk 2, etc., can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the housing 1, drive disk 4, moving scroll disk 3 and stationary scroll disk 2, etc., can also be referred to the descriptions in the above exemplary embodiments.

[0125] The scroll compressor of this embodiment adopts the above design. By setting a drive disk 4 and enabling the moving scroll disk 3 to float relative to each other, a back pressure chamber is set, and a first channel 201 that connects the exhaust chamber c and the back pressure chamber is arranged. In this way, when the axial gas pressure between the moving scroll disk 3 and the stationary scroll disk 2 is too high and a gap is generated, the first channel 201 can transport the high-pressure gas in the exhaust chamber c to the back pressure chamber. After the high-pressure gas enters the back pressure chamber, the gas pressure increases, and the gas can push the moving scroll disk 3 closer to the stationary scroll disk 2 until the moving scroll disk 3 and the stationary scroll disk 2 re-contact, thereby achieving a sealing effect and reducing gas leakage between the chambers. This is beneficial to improving the compression efficiency of the scroll compressor.

[0126] An embodiment of the second aspect of this application provides an air conditioning device, which includes a scroll compressor according to the first aspect of this application.

[0127] The air conditioning device described in this application, by employing the aforementioned scroll compressor, can increase the air pressure on the side of the moving scroll 3 facing away from the stationary scroll 2 when a gap is generated between the moving scroll 3 and the stationary scroll 2, causing the moving scroll 3 to float and adhere tightly to the stationary scroll 2. This reduces gas leakage between the chambers of the two devices, which is beneficial to improving the compression efficiency of the scroll compressor, thereby enabling the air conditioning device to have a higher energy efficiency ratio and saving operating energy consumption.

[0128] Meanwhile, the drive disc 4 is located on the back side of the moving scroll disc 3, which prevents the back side of the moving scroll disc 3 from contacting the housing 1 and thus avoids corresponding wear. The moving scroll disc 3 is not easily damaged, which helps to extend the service life of the air conditioning unit.

[0129] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A scroll compressor, characterized in that: Includes a housing (1), a stationary vortex disk (2) disposed within the housing (1), a moving vortex disk (3) meshing with the stationary vortex disk (2), and a drive disk (4) capable of driving the moving vortex disk (3) to translate relative to the stationary vortex disk (2). The moving scroll disk (3) can float relative to the driving disk (4) along its own axis. The housing (1), the stationary scroll disk (2), the moving scroll disk (3) and the driving disk (4) together form a back pressure cavity. The stationary vortex disk (2) is provided with a first channel (201). When the moving vortex disk (3) is away from the stationary vortex disk (2) along its own axis, the first channel (201) can connect the exhaust chamber (c) and the back pressure chamber, so that the gas in the exhaust chamber (c) enters the back pressure chamber through the first channel (201), so that the moving vortex disk (3) can approach the stationary vortex disk (2) along its own axis.

2. The scroll compressor according to claim 1, characterized in that: A first sealing part (5) is provided between the moving scroll disk (3) and the driving disk (4) to seal the gap between them. The first sealing part (5) is annular, and the back pressure chamber includes a first pressure chamber (d1) located inside the first sealing part (5). The moving scroll disk (3) is provided with a second channel (301), which connects the first pressure chamber (d1) and the exhaust chamber (c).

3. The scroll compressor according to claim 2, characterized in that: A second sealing part (6) is provided between the moving scroll disk (3) and the driving disk (4) to seal the gap between them. The second sealing part (6) is arranged around the first sealing part (5). The back pressure chamber includes a second pressure chamber (d2) disposed between the first sealing part (5) and the second sealing part (6), and a third pressure chamber (d3) located outside the second sealing part (6). The drive disk (4) is provided with a third channel (403), which connects the second pressure chamber (d2) and the third pressure chamber (d3); the first channel (201) is connected to the third pressure chamber (d3).

4. The scroll compressor according to claim 3, characterized in that: A third sealing part (7) is provided between the moving scroll disk (3) and the driving disk (4) to seal the gap between them. The third sealing part (7) is arranged between the second sealing part (6) and the first sealing part (5). The second pressure chamber (d2) includes a second inner pressure chamber (d21) located between the first sealing part (5) and the third sealing part (7), and a second outer pressure chamber (d22) located between the second sealing part (6) and the third sealing part (7). The third channel (403) is connected to the second inner pressure chamber (d21), and the moving vortex disk (3) is provided with a fourth channel (302), which connects the second outer pressure chamber (d22) and the intake chamber (a).

5. The scroll compressor according to claim 4, characterized in that: The drive disk (4) is provided with a receiving cavity (404) for accommodating the eccentric sleeve (16), the receiving cavity (404) is connected to the intake cavity (a), and the drive disk (4) is provided with a fifth channel (405), the fifth channel (405) connecting the second internal pressure cavity (d21) and the receiving cavity (404); and / or, The stationary vortex disk (2) and the housing (1) form a fourth pressure chamber (d4), which connects the exhaust chamber (c) to the external exhaust pipe. A sixth channel (202) is provided between the stationary vortex disk (2) and the housing (1), through which lubricating oil can enter the third pressure chamber (d3) from the fourth pressure chamber (d4).

6. The scroll compressor according to claim 1, characterized in that: The housing (1) includes a support portion (101) that supports the drive disk (4), and the drive disk (4) has a wear-resistant plate (8) on the side facing away from the static vortex disk (2). The drive disk (4) abuts against the bearing part (101) through the wear-resistant plate (8), and the wear-resistant plate (8) moves relative to the bearing part (101) with the moving scroll disk (3).

7. The scroll compressor according to claim 6, characterized in that: The housing (1) includes a housing body (102), the bearing part (101) includes a thrust ring embedded in the housing body (102), and a fourth sealing part (9) is provided between the thrust ring and the housing body (102) to seal the gap between them.

8. The scroll compressor according to claim 1, characterized in that: A first sealing strip (10) is embedded in the profile of the moving scroll plate (3), and the first sealing strip (10) can seal the gap between the profile of the moving scroll plate (3) and the plate body of the stationary scroll plate (2); and / or, The stationary vortex disk (2) has a second sealing strip (11) embedded in its profile. The second sealing strip (11) can seal the gap between the profile of the stationary vortex disk (2) and the disk body of the moving vortex disk (3).

9. The scroll compressor according to any one of claims 1 to 8, characterized in that: The housing (1) is provided with a limiting part (103); the drive disk (4) and the moving scroll disk (3) are connected by a connector (12), and the connector (12) is provided with a limiting fitting part (1201). The partial embedding of the limiting part (1201) into the limiting part (103) can restrict the translation of the drive disk (4) and the moving scroll disk (3) relative to the housing (1).

10. An air conditioning device, characterized in that: The air conditioning unit includes a scroll compressor as described in any one of claims 1 to 9.

Images