Compression assembly, scroll compressor and air conditioner

Abstract

This invention relates to the field of air conditioning compressor technology, specifically disclosing a compression assembly, a scroll compressor, and an air conditioner. The compression assembly includes a stationary scroll and a moving scroll. The stationary scroll forms a high-pressure chamber, and an exhaust chamber is provided on the other side of the stationary scroll. The high-pressure chamber communicates with the exhaust chamber through an exhaust port, which allows oil and compressed air to pass through. An oil return through-hole is provided on the stationary scroll, located below the exhaust port, communicating with the exhaust chamber and extending to the tip of the stationary scroll teeth. Oil enters the exhaust chamber through the exhaust port and then enters the lower oil return through-hole. Under the pressure of the compressed air, the oil reaches the tip of the stationary scroll teeth through the oil return through-hole. As the moving scroll rotates, the oil spreads across the tip of the stationary scroll teeth, forming an oil film in the gap between the tip of the stationary scroll teeth and the bottom of the moving scroll teeth, thereby achieving a good sealing effect on the axial gap between the stationary and moving scrolls.

Description

Technical Field

[0001] This invention relates to the field of air conditioning compressor technology, and more particularly to a compression assembly, a scroll compressor, and an air conditioner. Background Technology

[0002] Scroll compressors are widely used in various air conditioners due to their smooth operation, low wear, and low noise. A conventional scroll compressor consists of a pair of meshing moving and stationary scrolls that rotate 180° towards each other, forming multiple pairs of crescent-shaped closed working chambers. Driven by a transmission mechanism, the moving scroll rotates around the stationary scroll, and the volume of each working chamber gradually decreases. During gas compression, under the influence of gas force, the moving and stationary scrolls tend to separate, creating a gap at the axial tooth tips of the scrolls. Gas leaks from the high-pressure area to the low-pressure area through this axial gap, affecting compressor performance. Existing sealing methods involve using sealing strips at the tooth tips, but this is prone to poor sealing or even seal failure due to insufficient machining precision or problems with the material of the sealing strip itself. Summary of the Invention

[0003] The purpose of this invention is to provide a compression assembly, a scroll compressor, and an air conditioner to solve the problem of poor sealing performance in existing sealing methods.

[0004] This invention provides a compression assembly for a scroll compressor, comprising a stationary scroll and a moving scroll. The axis of the moving scroll rotates around the axis of the stationary scroll. A stationary scroll tooth is provided on one side of the stationary scroll, and the stationary scroll tooth meshes with the moving scroll tooth of the moving scroll to form a high-pressure chamber. An exhaust chamber is provided on the other side of the stationary scroll, and an oil return boss is convexly provided inside the exhaust chamber. The high-pressure chamber is connected to the exhaust chamber through an exhaust hole. An oil return through hole is provided on the oil return boss, and the oil return through hole is located below the exhaust hole. One end of the oil return through hole is connected to the exhaust chamber, and the other end extends to the tooth tip of the stationary scroll tooth. The tooth tip of the stationary scroll tooth contacts the bottom wall of the groove formed by the moving scroll tooth.

[0005] As a preferred technical solution for the compression assembly, the oil return boss is provided with an oil return groove located below the oil return through hole. The lower end of the oil return groove is connected to the exhaust chamber, and the oil return groove is connected to the oil return through hole.

[0006] As a preferred technical solution for the compression assembly, the lower end of the oil return boss and the inner wall of the exhaust chamber are provided with an oil return gap, and the lower end of the oil return groove extends to the lower end face of the oil return boss.

[0007] As a preferred technical solution for the compression component, the upper end of the oil return groove is connected to the oil return through hole.

[0008] As a preferred technical solution for the compression component, the top of the stationary disc vortex tooth is provided with a vortex groove, which is connected to the oil return through hole.

[0009] The present invention provides a scroll compressor, including a rear cover and a compression assembly according to any of the above embodiments. The stationary scroll plate of the compression assembly contacts the inner side of the rear cover, and the rear cover is provided with an output channel that communicates with the exhaust chamber.

[0010] As a preferred technical solution for scroll compressors, the rear cover is also provided with a reflux chamber, which is located below the output channel and is connected to the exhaust chamber.

[0011] As a preferred technical solution for scroll compressors, the top of the oil return boss is flush with the back of the stationary scroll plate, and a crossbeam is fixedly installed in the return cavity. The shape of the crossbeam is consistent with the shape of the oil return boss. The stationary scroll plate contacts the inner side of the rear cover, and the crossbeam contacts the oil return boss.

[0012] As a preferred technical solution for scroll compressors, a sealing ring is sandwiched between the stationary scroll plate and the rear cover.

[0013] The present invention provides an air conditioner, including a condenser, an evaporator, and a scroll compressor according to any of the above embodiments. The output end of the condenser is connected to the input end of the evaporator, the input end of the condenser is connected to the output end of the scroll compressor, and the output end of the evaporator is connected to the input end of the scroll compressor.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention provides a compression assembly for a scroll compressor. The compressor includes a rear cover. The compression assembly includes a stationary scroll and a moving scroll. One side of the stationary scroll has stationary scroll teeth that mesh with the moving scroll teeth of the moving scroll. The stationary scroll teeth include a tooth tip, a tooth side, and a tooth bottom. The moving scroll teeth include a tooth tip, a tooth side, and a tooth bottom. The tooth side, moving scroll teeth, and stationary scroll teeth together form a high-pressure chamber. The other side of the stationary scroll has an exhaust chamber. The high-pressure chamber is connected to the exhaust chamber through an exhaust port for the passage of oil and compressed air. The stationary scroll has an oil return through hole located below the exhaust hole and connected to the exhaust chamber. The oil return through hole passes through the tooth tip of the stationary scroll teeth. After the engine oil enters the exhaust chamber through the exhaust port, it enters the oil return passage located below the exhaust port. Under the pressure of the compressed air, the engine oil reaches the tooth tip of the stationary scroll tooth through the oil return passage. As the moving scroll rotates, the engine oil is distributed all over the tooth tip of the stationary scroll tooth, thus forming an oil film in the gap between the tooth tip of the stationary scroll tooth and the tooth bottom of the moving scroll tooth, thereby achieving a good sealing effect on the axial gap between the stationary scroll and the moving scroll. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of gas leakage from the high-pressure area to the low-pressure area through the axial gap between the compression assembly and the moving scroll plate in the prior art;

[0017] Figure 2 This is a rear view of the compression component in an embodiment of the present invention;

[0018] Figure 3 This is a front view of the compression component in an embodiment of the present invention;

[0019] Figure 4 This is a cross-sectional view of the compression component in an embodiment of the present invention;

[0020] Figure 5 This is a front view of the rear cover in an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram showing the connection relationship between the moving scroll plate, the stationary scroll plate, and the rear cover in an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Static scroll plate; 2. Exhaust chamber; 3. Oil return boss; 4. Oil return gap; 5. Oil return groove; 6. Oil return through hole; 7. Tooth top; 8. Scroll groove; 9. Rear cover; 10. Crossbeam; 11. Moving scroll plate; 12. High pressure chamber; 13. Exhaust port; 14. Root of moving scroll tooth; 15. Sealing groove; 16. Return chamber; 17. Output channel. Detailed Implementation

[0024] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] Scroll compressors are widely used in various air conditioners due to their smooth operation, low wear, and low noise. A conventional scroll compressor consists of a pair of meshing moving and stationary scrolls that rotate 180° towards each other, forming multiple pairs of crescent-shaped closed working chambers. Driven by a transmission mechanism, the moving scroll rotates around the stationary scroll, and the volume of each working chamber gradually decreases. During gas compression, under the influence of gas forces, the moving and stationary scrolls tend to separate, creating a gap at the axial tooth tips of the scrolls. Please refer to... Figure 1Gas leaks from the high-pressure area to the low-pressure area through the axial clearance at the top of the scroll plate teeth, affecting compressor performance. Existing sealing methods involve using sealing strips at the tooth tops; however, this is prone to poor sealing or even seal failure due to insufficient machining precision or problems with the sealing strip's material.

[0029] In response, this embodiment provides a compression assembly that can also seal axial gaps and solve the aforementioned problems.

[0030] like Figures 2-6 As shown, the present invention provides a compression assembly for a scroll compressor. The compressor includes a rear cover 9, a stationary scroll 1 and a moving scroll 11. A stationary scroll tooth is provided on one side of the stationary scroll 1, and the stationary scroll tooth meshes with the moving scroll tooth of the moving scroll 11 to form a high-pressure chamber 12. Specifically, the stationary scroll tooth includes the tooth tip 7, tooth flank, and tooth bottom of the stationary scroll tooth, and the moving scroll tooth includes the tooth tip, tooth flank, and tooth bottom of the moving scroll tooth. The tooth flank, tooth flank, tooth bottom, and tooth bottom of the moving scroll tooth together form a high-pressure chamber 12. An exhaust chamber 2 is provided on the other side of the stationary scroll 1. The high-pressure chamber 12 is connected to the exhaust chamber 2 through an exhaust hole 13. The exhaust hole 13 is used to pass oil and compressed air. An oil return through hole 6 is provided on the stationary scroll 1. The oil return through hole 6 is located below the exhaust hole 13. One end of the oil return through hole 6 is connected to the exhaust chamber 2, and the other end of the oil return through hole 6 extends to the tooth tip 7 of the stationary scroll tooth. The tooth tip 7 of the stationary scroll tooth and the bottom wall of the groove formed by the moving scroll tooth are in contact. After the engine oil enters the exhaust chamber 2 through the exhaust port 13, it enters the oil return passage 6 located below the exhaust port 13. Under the pressure of the compressed air, the engine oil reaches the tooth tip 7 of the stationary scroll tooth through the oil return passage 6. As the moving scroll 11 rotates, the engine oil is spread all over the tooth tip 7 of the stationary scroll tooth, thereby forming an oil film in the gap between the tooth tip 7 of the stationary scroll tooth and the tooth bottom 14 of the moving scroll tooth, thus achieving a good sealing effect on the axial gap between the stationary scroll 1 and the moving scroll 11.

[0031] Specifically, during the operation of the compression assembly, the stationary scroll 1 remains stationary, while the moving scroll 11 rotates around an eccentric shaft, with the axis of the eccentric shaft coinciding with the axis of the stationary scroll 1. As the moving scroll 11 rotates around the eccentric shaft, the moving scroll teeth of the moving scroll 11 and the stationary scroll teeth of the stationary scroll 1 cooperate to form multiple crescent-shaped high-pressure chambers 12. As the moving scroll 11 rotates, the gas in the high-pressure chambers 12 is compressed, enters the exhaust chamber 2 through the exhaust port 13, and is output through the output channel 17 provided on the rear cover 9. Simultaneously, during the operation of the compression assembly, engine oil enters the exhaust chamber 2 through the exhaust port 13 and accumulates at the lower part of the exhaust chamber 2 under the action of gravity. In this embodiment, the oil return hole 6 can be located at the lower part of the exhaust chamber 2. After the oil accumulates, it is pressed into the oil return hole 6 under the action of compressed air and reaches the position of the tooth tip 7 of the stationary scroll tooth. As the moving scroll 11 rotates, the oil covers the tooth tip 7 of the stationary scroll tooth and fills the circumferential gap between the tooth tip 7 of the stationary scroll tooth and the tooth bottom 14 of the moving scroll tooth, forming an oil film, thereby achieving the sealing of the axial gap, effectively preventing compressed gas from leaking from the high pressure area to the low pressure area through the axial gap, and improving the efficiency of the compression assembly in compressing gas.

[0032] Furthermore, such as Figures 2-4 As shown, an oil return boss 3 is fixedly installed inside the exhaust chamber 2, and the oil return boss 3 contacts the rear cover 9. An oil return groove 5 is provided on the oil return boss 3, located below the oil return through hole 6. The lower end of the oil return groove 5 communicates with the exhaust chamber 2, and the oil return groove 5 communicates with the oil return through hole 6. Preferably, the end of the oil return groove 5 communicating with the exhaust chamber 2 is located at the lower part of the exhaust chamber 2. After the oil return boss 3 contacts the rear cover 9, the engine oil, under the action of compressed gas, enters the oil return groove 5 from the exhaust chamber 2 through one end of the oil return groove 5, and then reaches the tooth tip 7 of the stationary disc scroll gear through the oil return through hole 6. The arrangement of the oil return boss 3 and the oil return groove 5 allows the position of the oil return through hole 6 to be adjusted, thus adapting to more application scenarios.

[0033] Specifically, such as Figures 2-4 As shown, the oil return groove 5 on the oil return boss 3 communicates with the exhaust chamber 2 at one end, and an oil return gap 4 is formed between the oil return groove 5 and the inner wall of the exhaust chamber 2. The oil return gap 4 communicates with the exhaust chamber 2, and the lower end of the oil return groove 5 extends to the lower end face of the oil return boss 3 and communicates with the oil return gap 4. When the compression assembly is running, the oil enters the exhaust chamber 2 through the exhaust port 13 and accumulates at the lower end of the exhaust chamber 2. As the oil accumulates to fill the oil return gap 4 between the oil return boss 3 and the inner wall of the exhaust chamber 2, the oil enters the oil return groove 5 under pressure and reaches the tooth tip 7 of the stationary disc scroll tooth through the oil return through hole 6.

[0034] Optionally, to ensure that the engine oil can be quickly and fully distributed on the tooth tips 7 of the stationary scroll plate, thereby improving the sealing effect on the axial clearance, in this embodiment, the oil return through hole 6 is connected to the upper end of the oil return groove 5. Thus, the oil return through hole 6 can be positioned near the center of the stationary scroll plate 1, allowing the engine oil to be distributed more quickly and fully on the tooth tips 7 of the stationary scroll plate when the moving scroll plate 11 rotates. Simultaneously, a scroll groove 8 can be provided on the tooth tips 7 of the stationary scroll plate, with the oil return through hole 6 connected to the scroll groove 8. Under the guidance of the scroll groove 8, the engine oil can more quickly fill the tooth tips 7 of the stationary scroll plate and distribute evenly, making the oil film formed in the axial clearance more uniform, while ensuring the sealing effect of the multiple crescent-shaped high-pressure chambers 12.

[0035] like Figures 5-6 As shown, this invention provides a scroll compressor, including a rear cover 9 and a compression assembly as described in this embodiment. The stationary scroll plate 1 of the compression assembly contacts the inner side of the rear cover 9. The rear cover 9 is provided with an output channel 17, which communicates with the exhaust chamber 2 of the stationary scroll plate 1. Please refer to... Figure 6 The compressor is shown in the view shown, operating horizontally. The output channel 17 is positioned above the exhaust port 13, where it connects to the exhaust chamber 2. The rear cover 9 also has a return chamber 16, located below the output channel 17. Specifically, the top of the return chamber 16 is below the position where the output channel 17 connects to the exhaust chamber 2. Furthermore, the return chamber 16 is not connected to the output channel 17 on the rear cover 9. The return chamber 16 connects to the exhaust chamber 2. After the oil and compressed air enter the exhaust chamber 2, the compressed air is output through the output channel 17. Because the position where the output channel 17 connects to the exhaust chamber 2 is above the exhaust port 13, it ensures that the oil entering the exhaust chamber 2 from the exhaust port 13 is not carried into the output channel 17 by the compressed air. Under the influence of gravity, the oil enters the exhaust chamber 2 and accumulates at the bottom of the exhaust chamber 2 and the return chamber 16, reaching the tooth tip 7 of the stationary disc scroll tooth through the oil return groove 5 and the oil return through hole 6.

[0036] Optionally, after the stationary scroll plate 1 is connected to the rear cover 9, the contact position between the rear cover 9 and the oil return boss 3 may be difficult to process or deform during assembly, which could lead to a loose contact between the oil return boss 3 on the stationary scroll plate 1 and the rear cover 9, resulting in a reduction in the amount of oil reaching the tooth tip 7 of the scroll plate. Therefore, a crossbeam 10 is fixedly installed in the return cavity 16 on the rear cover 9. The shape of the crossbeam 10 is consistent with the shape of the oil return boss 3, or the crossbeam 10 can completely cover the oil return boss 3. The top of the oil return boss 3 is set to be flush with the back of the stationary scroll plate 1. When the back of the stationary scroll plate 1 contacts the inner side of the rear cover 9, the crossbeam 10 contacts the oil return boss 3. When manufacturing the rear cover 9, the crossbeam 10 is provided to facilitate machining and ensure machining accuracy. After the static scroll plate 1 is connected to the rear cover 9, the crossbeam 10 strengthens the local structural strength and rigidity of the rear cover 9, effectively reducing the deformation of the rear cover 9 during assembly, thereby reducing the probability of insufficient contact between the oil return boss 3 and the rear cover 9.

[0037] Optionally, a sealing ring is also provided between the compression assembly and the rear cover 9, with both sides of the sealing ring abutting against the stationary scroll plate 1 and the rear cover 9, respectively. To ensure the sealing effect of the sealing ring, a sealing groove 15 is also provided on the stationary scroll plate 1. The sealing ring is at least partially disposed in the sealing groove 15 and abuts against the groove wall of the sealing groove 15. The portion of the sealing ring protruding from the sealing groove 15 undergoes creep under pressure after the stationary scroll plate 1 and the rear cover 9 are connected, thereby achieving a seal between the stationary scroll plate 1 and the rear cover 9.

[0038] This invention provides an air conditioner comprising a condenser, an evaporator, and a scroll compressor as described in this embodiment. The output end of the condensate is connected to the input end of the evaporator, the input end of the condenser is connected to the output end of the scroll compressor, and the output end of the evaporator is connected to the input end of the scroll compressor. By incorporating the scroll compressor in this embodiment, the gas compression efficiency is improved, thereby enhancing the heat exchange efficiency of the air conditioner and reducing energy consumption.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A compression assembly for a scroll compressor, characterized in that, The device includes a stationary vortex disk (1) and a moving vortex disk (11). The axis of the moving vortex disk (11) rotates around the axis of the stationary vortex disk (1). A stationary vortex tooth is provided on one side of the stationary vortex disk (1), and the stationary vortex tooth meshes with the moving vortex tooth of the moving vortex disk (11) to form a high-pressure chamber (12). An exhaust chamber (2) is provided on the other side of the stationary vortex disk (1). A return oil boss (3) is provided inside the exhaust chamber (2). The high-pressure chamber (12) is connected to the exhaust chamber (2) through an exhaust hole (13). An oil return through hole (6) is provided on the oil return boss (3), and the oil return through hole (6) is located below the exhaust hole (13). In this configuration, one end of the oil return through hole (6) is connected to the exhaust chamber (2), and the other end extends to the tooth tip (7) of the stationary disk volute tooth. The tooth tip (7) of the stationary disk volute tooth contacts the bottom wall of the groove formed by the moving disk volute tooth. An oil return groove (5) is provided on the oil return boss (3) located below the oil return through hole (6). The oil return groove (5) extends radially along the stationary volute (1). The lower end of the oil return groove (5) is connected to the exhaust chamber (2), and the upper end of the oil return groove (5) is connected to the oil return through hole (6). The end of the oil return groove (5) connected to the exhaust chamber (2) is located at the lower part of the exhaust chamber (2). The top (7) of the stationary disc vortex tooth is provided with a vortex groove (8), and the vortex groove (8) is connected to the oil return through hole (6).

2. The compression assembly according to claim 1, characterized in that, The lower end of the oil return boss (3) is provided with an oil return gap (4) at a distance from the inner wall of the exhaust chamber (2), and the lower end of the oil return groove (5) extends to the lower end face of the oil return boss (3).

3. A scroll compressor, characterized in that, Includes a rear cover (9) and a compression assembly as described in any one of claims 1-2, wherein the static vortex disk (1) of the compression assembly contacts the inner side of the rear cover (9), and the rear cover (9) is provided with an output channel (17) that communicates with the exhaust chamber (2).

4. The scroll compressor according to claim 3, characterized in that, The rear cover (9) is also provided with a reflux chamber (16), which is located below the output channel (17) and is connected to the exhaust chamber (2).

5. The scroll compressor according to claim 4, characterized in that, The top of the oil return boss (3) is flush with the back of the stationary vortex disk (1). A crossbeam (10) is fixedly installed in the return cavity (16). The shape of the crossbeam (10) is consistent with the shape of the oil return boss (3). The stationary vortex disk (1) is in contact with the inner side of the rear cover (9). The crossbeam (10) is in contact with the oil return boss (3).

6. The scroll compressor according to claim 3, characterized in that, A sealing ring is sandwiched between the static vortex disk (1) and the rear cover (9).

7. An air conditioner, comprising a condenser and an evaporator, wherein the output terminal of the condenser is connected to the input terminal of the evaporator, characterized in that, It also includes the scroll compressor according to any one of claims 3-6, wherein the input end of the condenser is connected to the output end of the scroll compressor, and the output end of the evaporator is connected to the input end of the scroll compressor.

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