Scroll compressor, refrigeration device and automobile

Abstract

The application discloses a scroll compressor, a refrigeration device and a car, and relates to the technical field of scroll compressors. The scroll compressor comprises a static scroll disc, a dynamic scroll disc, a bearing seat and a rotating shaft. The dynamic scroll disc is connected with the static scroll disc in a meshing mode, and a compression cavity is formed between the dynamic scroll disc and the static scroll disc; the rotating shaft is arranged in the bearing seat and connected with the dynamic scroll disc, so as to drive the dynamic scroll disc to rotate relative to the static scroll disc; wherein, a back pressure cavity is formed between the bearing seat and the dynamic scroll disc; the bearing seat is provided with a first oil return channel which is communicated with the back pressure cavity and communicated with the compression cavity; a deformable body is arranged between the bearing seat and the dynamic scroll disc, and the deformable body is deformed under the action of the dynamic scroll disc, so as to change the flow section of the first oil return channel. According to the application, the refrigeration oil can be returned to the compression cavity between the dynamic scroll disc and the static scroll disc, and the axial flexible sealing of the dynamic scroll disc and the static scroll disc can be ensured.

Description

Technical Field

[0001] This application relates to the field of compressor technology, and more particularly to a scroll compressor, refrigeration equipment, and automobile. Background Technology

[0002] As the heart of a refrigeration system, the compressor is a fluid machine that compresses the low-pressure working fluid into a high-pressure working fluid before discharging it. Among them, scroll compressors are widely used due to their small size, low noise, energy efficiency, and high performance. However, current scroll compressors may have problems such as the refrigerant oil not being able to return to the compression chamber between the moving scroll and the stationary scroll, and there may also be problems with poor axial sealing between the moving scroll and the stationary scroll. Summary of the Invention

[0003] This application proposes a scroll compressor, refrigeration equipment, and automobile to solve the problems of poor axial sealing between the moving scroll and stationary scroll during the operation of the scroll compressor in the prior art and the inability of refrigeration oil to return to the compression chamber between the moving scroll and stationary scroll.

[0004] To solve the above-mentioned technical problems, this application proposes a scroll compressor, which includes a stationary scroll, a moving scroll, a bearing housing, and a rotating shaft; the moving scroll is meshed with the stationary scroll and forms a compression chamber between them; the rotating shaft passes through the bearing housing and is connected to the moving scroll to drive the moving scroll to rotate relative to the stationary scroll; wherein, a back pressure chamber is formed between the bearing housing and the moving scroll; the bearing housing is provided with a first oil return channel communicating with the back pressure chamber, the first oil return channel communicating with the compression chamber, and a deformable body is provided between the bearing housing and the moving scroll, the deformable body deforming under the action of the moving scroll to change the flow cross section of the first oil return channel.

[0005] To solve the above-mentioned technical problems, this application proposes a refrigeration device, which includes the scroll compressor described above.

[0006] To solve the above-mentioned technical problems, this application proposes an automobile that includes the aforementioned refrigeration equipment.

[0007] This application incorporates a first oil return channel in the bearing housing, which connects to the back pressure chamber and the compression chamber. This allows the working fluid and refrigerant oil in the back pressure chamber to flow into the compression chamber through the first oil return channel, preventing them from remaining in the back pressure chamber and failing to return to the area between the moving and stationary scroll plates, thus affecting the lubrication of important friction pairs and the oil seal of the sealing surfaces. Furthermore, during the operation of the scroll compressor, the working fluid between the moving and stationary scroll plates exerts a force on the moving scroll plate, and the back pressure between the moving scroll plate and the bearing housing... The working fluid in the cavity also exerts a force on the moving scroll plate. The two forces can be canceled out by adjusting the gas pressure in the back pressure cavity. Specifically, the gas pressure in the back pressure cavity can be adjusted by adjusting the flow cross-section of the first oil return channel in the bearing housing through the deformable body set between the bearing housing and the moving scroll plate. When the flow cross-section decreases, the gas pressure in the back pressure cavity increases accordingly, and when the flow cross-section increases, the gas pressure in the back pressure cavity decreases accordingly, so that the two forces cancel each other out, realize the dynamic balance of the moving scroll plate, and ensure the axial seal between the moving scroll plate and the stationary scroll plate. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a schematic diagram of the structure of an embodiment of the scroll compressor of this application;

[0010] Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle;

[0011] Figure 3 yes Figure 1 Enlarged schematic diagram of part B in the middle;

[0012] Figure 4 This is a schematic diagram of another embodiment of the scroll compressor of this application;

[0013] Figure 5 yes Figure 4 An enlarged schematic diagram of section C;

[0014] Figure 6 This is a schematic diagram of the structure of another embodiment of the scroll compressor of this application;

[0015] Figure 7 yes Figure 6 An enlarged schematic diagram of section D in the middle;

[0016] Figure 8This is a schematic diagram of the structure of another embodiment of the scroll compressor of this application;

[0017] Figure 9 yes Figure 8 An enlarged schematic diagram of section E in the middle. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0019] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an embodiment of the scroll compressor 100 of this application. Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle.

[0020] like Figure 1 and Figure 2 As shown, the scroll compressor 100 in this embodiment includes a stationary scroll 110, a moving scroll 120, a rotating shaft 130, and a bearing housing 140. The moving scroll 120 is meshed with the stationary scroll 110, forming a compression chamber between them. The rotating shaft 130 passes through the bearing housing 140 and is connected to the moving scroll 120 to drive the moving scroll 120 to rotate relative to the stationary scroll 110. A back pressure chamber 160 is formed between the bearing housing 140 and the moving scroll 120. The bearing housing 140 is provided with a first oil return channel communicating with the back pressure chamber 160 and the compression chamber. A deformable body 150 is provided between the bearing housing 140 and the moving scroll 120. The deformable body 150 deforms under the action of the moving scroll 120 to change the flow cross-section of the first oil return channel.

[0021] Understandably, the working fluid in the compression chamber between the moving scroll plate 120 and the stationary scroll plate 110 exerts an axial force F1 on the moving scroll plate 120, which can push the moving scroll plate 120 to move away from the stationary scroll plate 110. A back pressure chamber 160 is formed between the bearing housing 140 and the moving scroll plate 120. The gas in the back pressure chamber 160 exerts an axial force F2 on the moving scroll plate 120, which can push the moving scroll plate 120 to move closer to the stationary scroll plate 110.

[0022] In this embodiment, the bearing housing 140 is provided with a first oil return channel communicating with the back pressure chamber 160. The first oil return channel communicates with the compression chamber, so that the working fluid and refrigerant oil in the back pressure chamber 160 can flow into the compression chamber through the first oil return channel, preventing the working fluid and refrigerant oil in the back pressure chamber 160 from being trapped in the back pressure chamber 160, and preventing the refrigerant oil from being unable to return to the compression chamber between the moving scroll plate 120 and the stationary scroll plate 110, which would affect the lubrication of important friction pairs and the oil seal of the sealing surface; in addition, the bearing housing 140 can be connected to the compression chamber through the first oil return channel. The deformable body 150 set between the 0 and the moving scroll plate 120 adjusts the flow cross section of the first oil return channel in the bearing housing 140 to adjust the gas pressure in the back pressure chamber 160. When the flow cross section decreases, the gas pressure in the back pressure chamber 160 increases accordingly, and when the flow cross section increases, the gas pressure in the back pressure chamber 160 decreases accordingly. This allows the axial force F2 to cancel out the axial force F1, achieving dynamic balance of the moving scroll plate 120 and ensuring axial sealing between the moving scroll plate 120 and the stationary scroll plate 110.

[0023] Specifically, the stationary scroll plate 110 includes a stationary scroll plate body (not shown in the figure) and stationary scroll teeth (not shown in the figure). The stationary scroll plate body has a frame structure, and the stationary scroll teeth are disposed within the stationary scroll plate body. The moving scroll plate 120 includes a moving scroll plate bottom (not shown in the figure) and moving scroll teeth (not shown in the figure). The scroll plate bottom has a flat plate structure, and the moving scroll teeth are disposed on the scroll plate bottom. The stationary scroll plate 110 and the moving scroll plate 120 are connected by the staggered 180° opposing meshing of the stationary scroll teeth and the moving scroll teeth, and the moving scroll plate 120 is entirely contained within the stationary scroll plate body.

[0024] Based on the 180° offset meshing of the stationary and moving vortex teeth, the rotational translation of the moving vortex disk 120 within the stationary vortex disk 110 can gradually compress the working medium in the outer periphery of the compression chamber to the central region of the compression chamber, thereby compressing the low-pressure working medium into a high-pressure working medium.

[0025] Understandably, an intake port (not shown) is provided on the outer periphery of the stationary scroll plate, and an exhaust port 111 is provided in the central region at the bottom of the stationary scroll plate. The low-pressure working fluid enters the compression chamber through the intake port. Under the relative motion of the moving scroll plate 120 and the stationary scroll plate 110, the low-pressure working fluid is compressed to the central region of the compression chamber and is compressed into a high-pressure working fluid. The high-pressure working fluid is then discharged through the exhaust port 111.

[0026] The compression chamber between the moving scroll plate 120 and the stationary scroll plate 110 may include an intake chamber, an intermediate pressure chamber, and an exhaust chamber. It is understood that the compression chamber between the moving scroll plate 120 and the stationary scroll plate 110 may be divided into multiple sub-compression chambers by the moving scroll teeth and the stationary scroll teeth. The intake chamber, intermediate pressure chamber, and exhaust chamber may be some of the multiple sub-compression chambers. More specifically, the intake chamber may refer to the sub-compression chamber where the working fluid is drawn in to initiate the compression operation. The exhaust chamber, communicating with the exhaust port 111, may refer to the sub-compression chamber that has just begun to discharge or is in the process of discharge. The intermediate pressure chamber arranged between the intake chamber and the exhaust chamber may refer to the sub-compression chamber where the compression operation is in progress or being executed.

[0027] In this embodiment, the first oil return channel connects to the suction chamber, allowing the working fluid and refrigerant oil in the back pressure chamber 160 to enter the suction chamber through the first oil return channel. The refrigerant oil can accompany the working fluid into the intermediate pressure chamber and the discharge chamber, which can fully lubricate the moving scroll plate 120 and the stationary scroll plate 110, improving the compressor performance and operational stability. Of course, in other embodiments, the first oil return channel can connect to the intermediate pressure chamber or the discharge chamber.

[0028] In this embodiment, as Figure 4 and Figure 5 As shown, the deformable body 150 may be provided with a first oil return hole 151. The first oil return hole 151 is connected to a first oil return channel. The first oil return hole 151 can be directly connected to the compression chamber. Specifically, as shown... Figure 5 As shown, the first oil return hole 151 can communicate with the gap between the moving scroll plate 120 and the stationary scroll plate 110, so that the working fluid and refrigerant oil in the back pressure chamber 160 can enter the compression chamber through the first oil return channel, the first oil return hole 151 and the gap. Additionally, as... Figure 6 and Figure 7 As shown, the inner wall of the stationary vortex disk can be provided with a concave portion 115, which is directly connected to the first oil return hole 151. By setting the concave portion 115, the gap between the stationary vortex disk body and the bottom of the moving vortex disk can be enlarged, which makes it easier to set the position of the first oil return hole 151 and the first oil return channel on the deformable body 150.

[0029] In another embodiment, such as Figure 1 and Figure 2As shown, a second oil return channel 112 communicating with the compression chamber can also be provided on the stationary vortex disk 110. The second oil return channel 112 communicates with the first oil return hole 151. Thus, the first oil return channel communicates with the compression chamber through the first oil return hole 151 and the second oil return channel 112, meaning that substances such as working fluid and refrigerant oil in the back pressure chamber 160 can enter the compression chamber through the first oil return channel, the first oil return hole 151, and the second oil return channel 112. It can be understood that the second oil return channel 112 can be located within the stationary vortex disk body. Of course, the second oil return channel 112 can also be located within the stationary vortex gear.

[0030] In another embodiment, the stationary vortex disk 110 is provided with a second oil return channel 112 communicating with the compression chamber. The second oil return channel 112 communicates with the first oil return hole 151. Further, as... Figure 1 and Figure 2 As shown, the scroll compressor 100 may further include a buffer chamber 180 for buffering substances such as working fluid and refrigerant oil. The buffer chamber 180 may be connected to the second oil return channel 112. Additionally, the stationary scroll plate 110 may be provided with a third oil return channel 113 connecting the buffer chamber 180 and the compression chamber. Thus, the second oil return channel 112 can connect to the compression chamber through the buffer chamber 180 and the third oil return channel 113. Consequently, substances such as working fluid and refrigerant oil in the back pressure chamber 160 can enter the buffer chamber 180 through the first oil return channel, the first oil return hole 151, and the second oil return channel 112. After being buffered by the buffer chamber 180, they enter the compression chamber through the third oil return channel 113. Similarly, the third oil return channel 113 may be located within the stationary scroll plate body and / or the stationary scroll teeth.

[0031] For the first oil return channel, a groove 141 and an oil return channel 142 connecting the groove 141 and the back pressure chamber 160 are provided on the end face of the bearing housing 140 facing the moving scroll plate 120; a guide channel 143 connecting the groove 141 and the first oil return hole 151 is provided in the bearing housing 140; wherein the oil return channel 142, the groove 141 and the guide channel 143 constitute the first oil return channel. It can be understood that the orthogonal projection of the groove 141 and the oil return channel 142 on the deformable body 150 does not fall on the first oil return hole 151, so the first oil return hole 151 is not directly connected to the groove 141 and the oil return channel 142. This ensures that the gas pressure in the back pressure chamber 160 can be changed through the deformable body 150, thereby ensuring the dynamic balance of the moving scroll plate 120.

[0032] The groove 141 serves as the deformation space for the deformable body 150. In this embodiment, the deformable body 150 is sheet-like and is disposed on the end face of the bearing seat 140 facing the moving scroll disk 120. The deformable body 150 deforms under the action of the moving scroll disk 120, and the area of ​​the groove 141 is larger than the area of ​​action of the moving scroll disk 120 on the deformable body 150. Therefore, the deformable body 150 can deform towards the groove 141 under the action of the moving scroll disk 120.

[0033] In addition, the flow channel 143 can be formed by at least two interconnected blind holes. It is understood that the openings of the two blind holes are respectively connected to the groove 141 and the first oil return hole 151.

[0034] In another embodiment, such as Figure 8 and Figure 9 As shown, the flow channel 143 includes two blind holes and a connecting hole 1431 connecting the two blind holes. The openings of the two blind holes communicate with the groove 141 and the first oil return hole 151, respectively. The connecting hole 1431 is located on the side of the bearing seat 140 away from the moving scroll plate 120, and the end of the connecting hole 1431 away from the moving scroll plate 120 is sealed by a sealing element 1433. The sealing element 1433 can be a bolt, screw, or other fastener. The advantage of this embodiment is that by opening the connecting hole 1431 on the side of the bearing seat 140 away from the moving scroll plate 120, the two blind holes can be connected through the connecting hole 1431, which simplifies the connection between the two blind holes and reduces the required process precision.

[0035] Of course, in other embodiments, the flow channel 143 may be an arc-shaped channel or an irregularly shaped channel.

[0036] In this embodiment, the scroll compressor 100 may further include an end cover 190 connected to the stationary scroll plate 110. A high-pressure exhaust chamber 170 and a buffer chamber 180 are formed between the end cover 190 and the stationary scroll plate 110.

[0037] In this embodiment, as Figure 3As shown, the scroll compressor 100 may further include an oil inlet channel 144 connecting to the back pressure chamber 160. The oil inlet channel 144 connects to the high-pressure exhaust chamber 170. Thus, the high-pressure working fluid and refrigerant oil flowing from the discharge chamber into the high-pressure exhaust chamber 170 can enter the back pressure chamber 160 through the oil inlet channel 144. The working fluid and refrigerant oil entering the back pressure chamber 160 can then enter the compression chamber through the first return oil channel. The working fluid and refrigerant oil can then undergo compression circulation between the moving scroll plate 120 and the stationary scroll plate 110, becoming high-pressure working fluid and refrigerant oil again, and be discharged back into the high-pressure exhaust chamber 170. This allows the refrigerant oil and other substances to circulate within the scroll compressor 100, reducing refrigerant oil loss and improving the lubrication performance of the internal parts of the scroll compressor 100. Furthermore, the high-pressure working fluid and refrigeration oil in the high-pressure exhaust chamber 170 can enter the back pressure chamber 160 through the oil inlet channel 144, which can increase the gas pressure in the back pressure chamber 160. This allows the axial force F2 to cancel out the axial force F1, achieving dynamic balance of the moving scroll plate 120 and ensuring axial sealing between the moving scroll plate 120 and the stationary scroll plate 110.

[0038] The depth of the groove 141 can be less than the depth of the return oil channel 142 and the depth of the inlet oil channel 144.

[0039] In addition, the stationary scroll plate 110 is provided with an oil inlet channel 114 that connects to the high-pressure exhaust chamber 170, and the deformable body 150 is provided with an oil inlet hole 152 that connects the oil inlet channel 114 and the oil inlet groove 144; the oil inlet groove 144 connects to the high-pressure exhaust chamber 170 through the oil inlet hole 152 and the oil inlet channel 114. Thus, the working fluid and refrigeration oil in the high-pressure exhaust chamber 170 can enter the back pressure chamber 160 through the oil inlet channel 114, the oil inlet hole 152 and the oil inlet groove 144, realizing the circulation of refrigeration oil and increasing the gas pressure in the back pressure chamber 160, thereby achieving the dynamic balance of the moving scroll plate 120.

[0040] It is understood that the scroll compressor 100 may also include a housing (not shown in the figure). The housing is connected to the end cover 190 and cooperates with the end cover 190 to form a receiving cavity. Components such as the moving scroll 120, the stationary scroll 110, the rotating shaft 130, and the bearing housing 140 may all be disposed in the receiving cavity.

[0041] A sealing structure (not shown in the figure) may be provided between the end cap 190 and the housing, which can turn the accommodating cavity into a sealed cavity.

[0042] An exhaust port (not shown in the figure) is provided on the end cap 190, and an intake port (not shown in the figure) is provided on the housing.

[0043] To achieve the rotational translation of the moving scroll plate 120 relative to the stationary scroll plate 110, the rotating shaft 130 further includes a main shaft (not shown in the figure), an eccentric shaft head (not shown in the figure), and an eccentric wheel (not shown in the figure) that are fixedly connected. The eccentric shaft head drives the moving scroll plate 120 to move through the eccentric wheel.

[0044] In addition, to support the rotating shaft 130, a secondary bearing hole may be provided on the housing, and a secondary bearing (not shown in the figure) is provided in the secondary bearing hole. Specifically, the rotating shaft 130 is supported by the secondary bearing and the main bearing (not shown in the figure) in the bearing housing 140.

[0045] The scroll compressor 100 in this embodiment also includes a motor (not shown) and a drive controller (not shown). The motor is located inside the body and is connected to the rotating shaft 130 to drive the rotation of the rotating shaft 130. The drive controller is located outside the body and is connected to the motor to receive power and operating commands to drive the motor.

[0046] The scroll compressor 100 described above can be used to manufacture refrigeration equipment. Therefore, this application also proposes a refrigeration equipment that includes the scroll compressor 100 described above.

[0047] Furthermore, this refrigeration equipment can be applied to automobiles, and therefore this application also proposes an automobile that can use the aforementioned refrigeration equipment.

[0048] In summary, this application provides a scroll compressor, a refrigeration device, and an automobile. This application includes a first oil return channel connected to the back pressure chamber via a bearing housing. This first oil return channel connects to the compression chamber, allowing the working fluid and refrigerant oil in the back pressure chamber to flow into the compression chamber. This prevents the working fluid and refrigerant oil from remaining in the back pressure chamber and failing to return to the space between the moving and stationary scroll plates, thus affecting the lubrication of important friction pairs and the oil seal of the sealing surfaces. Furthermore, the gas pressure in the back pressure chamber can be adjusted by regulating the flow cross-section of the first oil return channel within the bearing housing using a deformable body positioned between the bearing housing and the moving scroll plate. A smaller flow cross-section corresponds to a larger gas pressure in the back pressure chamber, and a larger flow cross-section corresponds to a smaller gas pressure in the back pressure chamber. This allows the axial force F2 to cancel out the axial force F1, achieving dynamic balance of the moving scroll plate and ensuring axial sealing between the moving and stationary scroll plates.

[0049] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A scroll compressor, characterized in that, The scroll compressor includes: Static vortex disk; A moving scroll plate meshes with the stationary scroll plate and forms a compression chamber between them. The compression chamber includes an intake chamber, an intermediate pressure chamber, and an exhaust chamber. Bearing housing; A rotating shaft passes through the bearing housing and is connected to the moving scroll plate to drive the moving scroll plate to rotate relative to the stationary scroll plate; A back pressure cavity is formed between the bearing housing and the moving scroll disk; The bearing housing is provided with a first oil return channel that connects to the back pressure chamber. The first oil return channel connects to the suction chamber, the intermediate pressure chamber, or the discharge chamber of the compression chamber. The material in the back pressure chamber flows into the compression chamber through the first oil return channel. A deformable body is provided between the bearing housing and the moving scroll plate. The deformable body deforms under the action of the moving scroll plate to change the flow cross section of the first oil return channel. The scroll compressor further includes an end cover connected to a stationary scroll plate, forming a buffer cavity between the end cover and the stationary scroll plate. The buffer cavity and the back pressure cavity are located on opposite axial sides of the compression cavity. A second oil return channel communicating with the compression cavity is provided on the stationary scroll plate, and the buffer cavity is connected to the second oil return channel. A third oil return channel communicating with the buffer cavity and the compression cavity is provided on the stationary scroll plate. The second oil return channel communicates with the compression cavity through the buffer cavity and the third oil return channel, and the first oil return channel communicates with the compression cavity through the second oil return channel, the buffer cavity, and the third oil return channel.

2. The scroll compressor according to claim 1, characterized in that, The deformable body is provided with a first oil return hole that connects to the second oil return channel; and the first oil return hole connects to the first oil return channel. The first oil return channel is connected to the compression chamber through the first oil return hole and the second oil return channel.

3. The scroll compressor according to claim 2, characterized in that, The second oil return channel is connected to the suction chamber.

4. The scroll compressor according to claim 2, characterized in that, The bearing housing has a groove on the end face facing the moving scroll disk and an oil return channel connecting the groove and the back pressure chamber. The bearing housing has a guide channel that connects the groove and the first oil return hole. The groove, the return oil channel, and the guide channel constitute the first return oil channel.

5. The scroll compressor according to claim 4, characterized in that, The flow channel includes two blind holes and a connecting hole connecting the two blind holes. The openings of the two blind holes are respectively connected to the groove and the first oil return hole. The connecting hole is opened on the side of the bearing seat away from the moving scroll plate, and the end of the connecting hole away from the moving scroll plate is sealed by a sealing element.

6. The scroll compressor according to claim 1, characterized in that, A high-pressure exhaust chamber is formed between the end cap and the static vortex disk; The bearing housing has an oil inlet channel that connects to the back pressure chamber, and the oil inlet channel connects to the high-pressure exhaust chamber.

7. The scroll compressor according to claim 6, characterized in that, The stationary vortex disk is provided with an oil inlet channel that connects to the high-pressure exhaust chamber, and the deformable body is provided with an oil inlet hole that connects the oil inlet channel and the oil inlet groove. The oil inlet channel is connected to the high-pressure exhaust chamber through the oil inlet hole and the oil inlet passage.

8. A refrigeration device, characterized in that, The refrigeration equipment includes the scroll compressor according to any one of claims 1-7.

9. A car, characterized in that, The vehicle includes the refrigeration equipment as described in claim 8.

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