Oil-gas separation device and electric compressor

Abstract

The utility model discloses an oil-gas separation device and an electric compressor, and belongs to the technical field of compressors. According to the technical scheme, an oil-gas separation device is arranged on a static disc, a groove is formed in the static disc, and a compression cavity is formed between the static disc and a movable disc; the oil-gas separation device comprises an oil-gas separation assembly, and the oil-gas separation assembly is arranged in the groove; the oil-gas separation assembly comprises a separation cavity, one side of the separation cavity is communicated with the compression cavity, the other side of the separation cavity is communicated with a backflow channel, the oil-gas separation device of the electric compressor can effectively achieve separation of lubricating oil and a refrigerant, the structure of a rear cover is simplified, butt joint installation with an air conditioning system is facilitated, and the adaptability to different installation environments is improved; meanwhile, cyclic utilization of lubricating oil and stable operation of the system are guaranteed, the service life of the compressor is prolonged, and the working efficiency of the compressor is improved.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and more specifically, to an oil-gas separation device and an electric compressor. Background Technology

[0002] The oil-gas separator in an electric compressor is a key component of the air compressor, commonly known as an oil-gas separator. Its function is to separate and filter the oil-containing compressed air produced by the main unit, removing solid dust, oil particles, and liquid substances from the compressed air, ensuring that the compressor can discharge cleaner, higher-quality compressed air.

[0003] The conventional installation method for existing oil-gas separators is to place them inside the rear cover of the compressor. This layout not only occupies space in the rear cover, but also requires frequent adjustments to the position and angle of the exhaust port when adapting to different air conditioning systems due to the large number of integrated components in the rear cover. This reduces the flexibility of the rear cover installation and affects the compressor's adaptability to various installation environments. Therefore, a new solution is needed to address these issues. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an oil-gas separation device and an electric compressor. The design of the structure simplifies the rear cover structure, facilitates the connection and installation of the rear cover with the air conditioning system, and improves the compressor's adaptability to different installation environments.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an oil-gas separation device.

[0006] The oil-gas separator is mounted on a stationary disc, which has a groove, and a compression chamber is formed between the stationary disc and the moving disc.

[0007] The oil-gas separation device includes an oil-gas separation component, which is disposed in a groove;

[0008] The oil-gas separation assembly includes a separation chamber, one side of which is connected to a compression chamber, and the other side of which is connected to a reflux channel.

[0009] The present invention is further configured such that: the oil-gas separation assembly further includes a first tube and a second tube disposed in the groove, and the separation chamber is formed between the first tube and the second tube.

[0010] The present invention is further configured such that: a positioning part is fixedly connected to the air outlet end of the first tube, and the positioning part is detachably connected to the stationary plate.

[0011] The present invention is further configured such that: the outer wall of the positioning part is fitted with the inner wall of the groove, the cross-section of the positioning part is located at the boundary where the diameter of the semicircle of the first tube is greater than that of the first tube body, and the upper surface of the positioning part is higher than the upper surface of the stationary plate.

[0012] The present invention is further configured such that: the positioning part is interference-fitted with the groove, and the upper surface of the positioning part and the upper surface of the stationary plate are located in the same plane.

[0013] The present invention is further configured such that: a throttling tube is provided in the return channel, the throttling tube is sealed to the inner wall of the return channel, and a filter screen is provided at one end of the throttling tube.

[0014] The present invention is further configured such that: a separation air inlet is provided on one end side wall of the first pipe body, and a separation oil outlet is provided on the other end side wall of the first pipe body; the separation chamber and the compression chamber are connected through the separation air inlet, and the separation chamber and the return channel are connected through the separation oil outlet.

[0015] This utility model also discloses an electric compressor, including an oil-gas separation device as described in any of the above claims, and further including a front cover, a rear cover and a cylinder body, wherein the stationary disc is disposed in the cylinder body, the moving disc and the stationary disc are located between the front cover and the rear cover, and the rear cover has an exhaust chamber and an exhaust passage.

[0016] The present invention is further configured such that: an oil sump is provided on the inner side wall of the cylinder, the oil sump is connected to a return channel, and the return channel is located at the bottom of the electric compressor.

[0017] In summary, this utility model has the following beneficial effects:

[0018] The oil-gas separation device of the electric compressor can effectively separate the lubricating oil and refrigerant. The sealing of the throttling pipe and the function of the filter screen ensure the smooth return and cleanliness of the lubricating oil. The simplified rear cover structure facilitates the connection and installation with the air conditioning system, improves the adaptability to different installation environments, and at the same time ensures the recycling of lubricating oil and the stable operation of the system, extends the service life of the compressor, and improves its working efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the moving disk and the stationary disk;

[0021] Figure 3 This is a schematic diagram of the internal structure of the moving and stationary disks;

[0022] Figure 4 This is a schematic diagram of a partial cross-sectional view of the structure.

[0023] In the diagram: 1. Stationary disc; 2. Groove; 3. Oil-gas separation assembly; 4. Separation chamber; 5. Moving disc; 6. Compression chamber; 7. Return channel; 8. First pipe body; 9. Second pipe body; 10. Positioning part; 11. Throttling pipe; 12. Separation air inlet; 13. Separation oil outlet; 14. Front cover; 15. Rear cover; 16. Oil sump. Detailed Implementation

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

[0025] Example 1:

[0026] like Figure 2 and Figure 4 As shown, an oil-gas separation device includes an oil-gas separation component 3. A compression chamber 6 is formed between a stationary disc 1 and a moving disc 5. A groove 2 is provided on the stationary disc 1, and the oil-gas separation component 3 is disposed in the groove 2. The oil-gas separation component 3 includes a separation chamber 4. One side of the separation chamber 4 is connected to the compression chamber 6, and the other side of the separation chamber 4 is connected to a return channel 7. The oil-gas separation component 3 also includes a first tube 8 and a second tube 9 disposed in the groove 2. The separation chamber 4 is formed between the first tube 8 and the second tube 9. The first tube 8 and the second tube 9 together constitute the structure of the separation chamber 4, which determines the specific shape and spatial range of the separation chamber 4. This helps to achieve effective separation of lubricating oil under centrifugal force, allowing the lubricating oil to move along the inner wall of the separation chamber 4 and improving the efficiency of oil-gas separation.

[0027] In the above embodiment, the main body of the oil-gas separator is set in the stationary plate 1 and does not directly occupy the space of the rear cover 15. This reduces the restrictions on the setting and adjustment of the exhaust port opened on the rear cover 15, simplifies the structure of the rear cover 15 and reduces the processing cost of the rear cover 15, thereby reducing the integration difficulty and integration cost of the rear cover 15 with the air conditioning system.

[0028] Example 2:

[0029] like Figure 1As shown, an electric compressor includes a front cover 14, a rear cover 15, a cylinder, a stationary disc 1, a moving disc 5, and an oil-gas separation device. The stationary disc 1 is disposed in the cylinder, and the moving disc 5 and the stationary disc 1 are located between the front cover 14 and the rear cover 15. The stationary disc 1 and the moving disc 5 form a compression chamber 6 for gas compression during compressor operation. The rear cover 15 has an exhaust chamber and an exhaust passage. The inner side wall of the cylinder is provided with an oil sump 16 for storing lubricating oil. A return passage 7 is located at the bottom of the electric compressor and is connected to the oil sump 16, allowing the separated lubricating oil to return to the oil sump 16 for recycling. The exhaust chamber and the exhaust passage are responsible for discharging the refrigerant gas after compression and oil-gas separation, completing the entire compression refrigeration cycle.

[0030] like Figure 1 and Figure 2 As shown, a groove 2 is provided on the stationary plate 1, and an oil-gas separation device is installed in the groove 2. The oil-gas separation device includes an oil-gas separation component 3, which includes a separation chamber 4. The separation chamber 4 is the key area for oil-gas separation. One side is connected to the compression chamber 6, allowing the compressed refrigerant gas to enter the separation chamber 4 for oil-gas separation. The other side of the separation chamber 4 is connected to the return channel 7, providing a path for the separated lubricating oil to return to the oil sump 16, thereby realizing the separation of lubricating oil and refrigerant and ensuring the normal operation of the system.

[0031] like Figures 2-4 As shown, the oil-gas separation assembly 3 also includes a first tube 8 and a second tube 9 disposed in the groove 2. The separation chamber 4 is formed between the first tube 8 and the second tube 9. The first tube 8 and the second tube 9 together constitute the structure of the separation chamber 4, which determines the specific shape and spatial range of the separation chamber 4. This helps to achieve effective separation of lubricating oil under centrifugal force, allowing the lubricating oil to move along the inner wall of the separation chamber 4 and improving the efficiency of oil-gas separation.

[0032] like Figure 2 and Figure 3 As shown, the outlet end of the first tube 8 is fixedly connected to a positioning part 10, which serves to position and install the oil-gas separation component 3. In at least one embodiment, the positioning part is positioned by the inner wall and shape of the groove 2. The outer wall of the positioning part 10 fits against the inner wall of the groove 2. The cross-section of the positioning part 10 is located at the boundary that is larger than the semi-circular diameter of the first tube 8. The upper surface of the positioning part 10 is higher than the upper surface of the stationary plate 1. The contoured structure of the positioning part 10 facilitates the side insertion of the oil-gas separation device and can be accurately positioned in the groove 2. The non-destructive installation method is easy to implement, ensuring the stability of the oil-gas separation component 3 on the stationary plate 1 and reducing the impact of vibration and shaking on the oil-gas separation effect.

[0033] like Figure 1 and Figure 3As shown, in at least one embodiment, the positioning is achieved by the shape of the upper surface of the stationary plate 1 and the shape of the groove 2. The positioning part 10 is interference-fitted with the groove 2. The oil-gas separator is installed by pressing down and introducing it. After installation, the upper surface of the positioning part 10 and the upper surface of the groove in the stationary plate 1 are in the same plane, which makes the installation firm, reduces the processing difficulty, facilitates the installation and maintenance of the oil-gas separator assembly 3, and makes it easy to replace the positioning part 10 or the stationary plate 1 when it is damaged. By simplifying the structure of the rear cover 15, it is convenient to connect and install the rear cover 15 with the air conditioning system, and improves the adaptability of the electric compressor to different installation environments.

[0034] like Figure 1 and Figure 2 As shown, a throttling pipe 11 is installed in the return channel 7. The throttling pipe 11 is sealed to the inner wall of the return channel 7 to prevent lubricating oil leakage and ensure that the lubricating oil returns to the oil sump 16 along the return channel 7. A filter screen is provided at one end of the throttling pipe 11. The filter screen can filter impurities in the return channel 7 to prevent impurities from entering the oil sump 16 and affecting the quality of the lubricating oil and the normal operation of the compressor, thus ensuring the cleanliness of the lubricating oil.

[0035] like Figure 1 and Figure 3 As shown, a separation air inlet 12 is provided on one side wall of the first pipe body 8, and a separation oil outlet 13 is provided on the other side wall of the first pipe body 8. The separation chamber 4 and the compression chamber 6 are connected through the separation air inlet 12, and the separation chamber 4 and the return channel 7 are connected through the separation oil outlet 13. This realizes the connection between the separation chamber 4, the compression chamber 6, and the return channel 7. The compressed refrigerant gas can enter the separation chamber 4 through the separation air inlet 12 for oil-gas separation, while the separated lubricating oil enters the return channel 7 through the separation oil outlet 13 and finally returns to the oil sump 16, ensuring the oil-gas separation process and enabling the oil-gas circulation to operate normally.

[0036] Working principle: When the electric compressor is running, the moving plate 5 and the stationary plate 1 move relative to each other, which compresses the refrigerant gas in the compression chamber 6. The compressed high-pressure refrigerant gas enters the separation chamber 4 of the oil-gas separation component 3 through the separation inlet 12. In the separation chamber 4, due to the structure of the first tube 8 and the second tube 9, the gas flow will give the lubricating oil a certain inertial force. Under the centrifugal action of the second tube 9, the lubricating oil is thrown towards the inner wall of the separation chamber 4. The structure of the separation chamber 4 allows the lubricating oil to move along the inner wall, thereby achieving the initial separation of the lubricating oil and the refrigerant. The separated refrigerant gas is discharged from the compressor from the separation chamber 4 through the exhaust chamber and the exhaust channel, while the separated lubricating oil enters the return channel 7 through the separation outlet 13 and flows back to the oil sump 16 through the throttling pipe 11.

[0037] Installation steps: Install the oil-gas separation assembly 3, which is formed by the combination of the first tube body 8, the second tube body 9 and the positioning part 10, into the groove 2 on the stationary plate 1. One end of the second tube body 9 is connected to the separation chamber 4, and the other end of the second tube body 9 is installed and connected to the inner wall of the first tube body 8.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model according to the specific circumstances.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An oil-gas separation device, characterized in that: The oil-gas separation device is set on the stationary plate (1), and the stationary plate (1) has a groove (2) and a compression chamber (6) is formed between the stationary plate (1) and the moving plate (5); The oil-gas separation device includes an oil-gas separation component (3), which is disposed in the groove (2); The oil-gas separation assembly (3) includes a separation chamber (4), one side of which is connected to a compression chamber (6), and the other side of which is connected to a return channel (7).

2. The oil-gas separation device according to claim 1, characterized in that: The oil-gas separation assembly (3) also includes a first tube (8) and a second tube (9) disposed in the groove (2), and the separation chamber (4) is formed between the first tube (8) and the second tube (9).

3. The oil-gas separation device according to claim 2, characterized in that: The first tube (8) has a fixed connection to a positioning part (10) at its air outlet end, and the positioning part (10) is detachably connected to the stationary plate (1).

4. The oil-gas separation device according to claim 3, characterized in that: The outer wall of the positioning part (10) is in contact with the inner wall of the groove (2), the cross section of the positioning part (10) is located at the boundary of the semicircular diameter of the first tube (8), and the upper surface of the positioning part (10) is higher than the upper surface of the stationary plate (1).

5. The oil-gas separation device according to claim 3, characterized in that: The positioning part (10) is interference-fitted with the groove (2), and the upper surface of the positioning part (10) and the upper surface of the stationary plate (1) are located in the same plane.

6. The oil-gas separation device according to claim 1, characterized in that: A throttling tube (11) is provided inside the return channel (7). The throttling tube (11) is sealed to the inner wall of the return channel (7). A filter screen is provided at one end of the throttling tube (11).

7. An oil-gas separation device according to claim 2, characterized in that: The first pipe body (8) has a separation air inlet (12) on one side wall and a separation oil outlet (13) on the other side wall. The separation chamber (4) and the compression chamber (6) are connected through the separation air inlet (12), and the separation chamber (4) and the return channel (7) are connected through the separation oil outlet (13).

8. An electric compressor, comprising an oil-gas separation device according to any one of claims 2-7, characterized in that: It also includes a front cover (14), a rear cover (15) and a cylinder body. The stationary disc (1) is disposed in the cylinder body. The moving disc (5) and the stationary disc (1) are located between the front cover (14) and the rear cover (15). The rear cover (15) has an exhaust chamber and an exhaust passage.

9. The electric compressor according to claim 8, characterized in that: The inner wall of the cylinder is provided with an oil sump (16), which is connected to the return channel (7), which is located at the bottom of the electric compressor.

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