Oil-gas separation device and electric compressor

Abstract

The invention 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] The present invention relates to the technical field of compressors, and more specifically, to an oil-gas separation device and an electric compressor. Background Art

[0002] The oil-gas separation device of an electric compressor is one of the key spare parts in an air compressor, and is usually referred to as an oil-gas separator. Its function is to separate and filter the oil-containing compressed air generated by the main unit, remove the solid dust, oil-gas particles and liquid substances in the compressed air, and ensure that the compressor can discharge purer and higher-quality compressed air.

[0003] The conventional installation method of the existing oil-gas separation device is to be arranged inside the rear cover of the compressor. This layout not only occupies the space of the rear cover, but also when it is necessary to adapt to different specifications of air-conditioning systems, due to the large number of integrated components in the rear cover, it is necessary to frequently adjust the position and angle of the exhaust port during the adaptation process, which reduces the flexibility of the rear cover setting, and further affects the adaptability of the compressor to various installation environments. Therefore, a new solution is needed to solve the above problems. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an oil-gas separation device and an electric compressor, which achieve the purpose of simplifying the structure of the rear cover, facilitating the docking installation of the rear cover and the air-conditioning system, and improving the adaptability of the compressor to different installation environments through the structural setting.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: An oil-gas separation device,

[0006] The oil-gas separation device is arranged on a static disk, a groove is formed on the static disk, and a compression chamber is formed between the static disk and a moving disk;

[0007] The oil-gas separation device includes an oil-gas separation component, and the oil-gas separation component is arranged in the groove;

[0008] The oil-gas separation component includes a separation chamber, one side of the separation chamber is communicated with the compression chamber, and the other side of the separation chamber is communicated with a return channel.

[0009] The present invention is further arranged as: The oil-gas separation component further includes a first pipe body and a second pipe body arranged in the groove, and the separation chamber is formed between the first pipe body and the second pipe body.

[0010] The present invention is further arranged as: The air outlet end of the first pipe body is fixedly connected with a positioning part, and the positioning part is detachably connected with the static disk.

[0011] The present invention is further configured such that: the outer wall of the positioning portion fits with the inner wall of the groove, the cross-section of the positioning portion is located at a boundary greater than the semi-circle diameter of the first pipe body, and the upper surface of the positioning portion is higher than the upper surface of the static disc.

[0012] The present invention is further configured such that: the positioning portion is in interference fit with the groove, and the upper surface of the positioning portion and the upper surface of the static disc are in the same plane.

[0013] The present invention is further configured such that: a throttle pipe is arranged in the return channel, the throttle pipe is hermetically connected to the inner wall of the return channel, and a filter screen is provided at one end of the throttle pipe.

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

[0015] The present invention also discloses an electric compressor, which includes an oil-gas separation device according to any one of the above, and further includes a front cover, a rear cover and a cylinder block. The static disc is arranged in the cylinder block, the moving disc and the static disc are located between the front cover and the rear cover, and the rear cover is provided with an exhaust chamber and an exhaust channel.

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

[0017] In summary, the present invention has the following beneficial effects:

[0018] The oil-gas separation device of the electric compressor can effectively separate the lubricating oil from the refrigerant. The sealing of the throttle pipe and the function of the filter screen ensure the smooth return and cleanliness of the lubricating oil, simplify the structure of the rear cover, facilitate the docking and installation with the air-conditioning system, improve the adaptability to different installation environments, and at the same time ensure the recycling of the lubricating oil and the stable operation of the system, extend the service life of the compressor, and improve its working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic connection structure diagram of the moving disc and the static disc;

[0021] Figure 3 is a schematic internal structure diagram of the moving disc and the static disc;

[0022] Figure 4 is a schematic partial cross-sectional structure diagram.

[0023] In the figure: 1, static disk; 2, groove; 3, oil-gas separation component; 4, separation chamber; 5, moving disk; 6, compression chamber; 7, return channel; 8, first tube body; 9, second tube body; 10, positioning part; 11, throttle tube; 12, separation air inlet; 13, separation oil outlet; 14, front cover; 15, rear cover; 16, oil sump. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0025] Embodiment 1:

[0026] As Figure 2 and Figure 4 shown, an oil-gas separation device includes an oil-gas separation component 3. A compression chamber 6 is formed between a static disk 1 and a moving disk 5. A groove 2 is formed on the static disk 1. The oil-gas separation component 3 is arranged in the groove 2. The oil-gas separation component 3 includes a separation chamber 4. One side of the separation chamber 4 is communicated with the compression chamber 6, and the other side of the separation chamber 4 is communicated with a return channel 7. The oil-gas separation component 3 further includes a first tube body 8 and a second tube body 9 arranged in the groove 2. The separation chamber 4 is formed between the first tube body 8 and the second tube body 9. The first tube body 8 and the second tube body 9 together constitute the structure of the separation chamber 4, determining the specific shape and spatial range of the separation chamber 4, which helps to effectively separate the lubricating oil under the action of centrifugal force, enabling 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 part of the oil-gas separation device is arranged in the static disk 1 and does not directly occupy the space of the rear cover 15, thereby reducing the restrictions on the setting and adjustment of the exhaust port formed on the rear cover 15. At the same time, the structure of the rear cover 15 is simplified and the processing cost of the rear cover 15 is reduced, and further, the integration difficulty and integration cost of the rear cover 15 and the air-conditioning system can be reduced.

[0028] Embodiment 2:

[0029] As Figure 1As shown, an electric compressor includes a front cover 14, a rear cover 15, a cylinder body, a stator plate 1, a moving plate 5 and an oil-gas separation device, wherein the stator plate 1 is arranged in the cylinder body, the moving plate 5 and the stator plate 1 are located between the front cover 14 and the rear cover 15, and a compression chamber 6 for gas compression during the operation of the compressor is formed between the stator plate 1 and the moving plate 5, the rear cover 15 is provided with an exhaust chamber and an exhaust channel, an oil pool 16 for storing lubricating oil is provided on the inner side wall of the cylinder body, a reflux channel 7 is located at the bottom of the electric compressor, and is connected to the oil pool 16 through the reflux channel 7, so that the separated lubricating oil can be returned to the oil pool 16 for recycling, and the exhaust chamber and the exhaust channel are responsible for discharging the refrigerant gas after compression and oil-gas separation, thereby completing the entire compression refrigeration cycle.

[0030] like Figure 1 and Figure 2 As shown, a groove 2 is opened on the static plate 1, and an oil-gas separation device is arranged in the groove 2. The oil-gas separation device includes an oil-gas separation component 3. The oil-gas separation component 3 includes a separation chamber 4. The separation chamber 4 is a key area for oil-gas separation. One side of the separation chamber 4 is connected with the compression chamber 6, so that the compressed refrigerant gas can enter the separation chamber 4 for oil-gas separation; the other side of the separation chamber 4 is connected with the reflux channel 7, which provides a path for the separated lubricating oil to return to the oil pool 16, thereby realizing the diversion of the lubricating oil and the refrigerant, and ensuring the normal operation of the system.

[0031] like Figures 2 - 4 As shown, the oil-gas separation component 3 also includes a first tube body 8 and a second tube body 9 arranged in the groove 2, and the separation chamber 4 is formed between the first tube body 8 and the second tube body 9. The first tube body 8 and the second tube body 9 together constitute the structure of the separation chamber 4, determine the specific shape and spatial range of the separation chamber 4, and help to achieve effective separation of the lubricating oil under centrifugal action, so that the lubricating oil can move along the inner wall of the separation chamber 4, thereby improving the efficiency of oil-gas separation.

[0032] like Figure 2 and Figure 3 As shown, the air outlet end of the first tube body 8 is fixedly connected with a positioning portion 10, which plays the role of positioning and installing the oil-gas separation component 3. In at least one implementation, the positioning piece is positioned by the inner wall and shape of the groove 2. The outer wall of the positioning portion 10 fits with the inner wall of the groove 2. The cross-section of the positioning portion 10 is located at a boundary larger than the semicircular diameter of the first tube body 8. The upper surface of the positioning portion 10 is higher than the upper surface of the static plate 1. The contoured structure of the positioning portion 10 facilitates the side introduction of the oil-gas separation device and can be accurately positioned in the groove 2. The non-destructive installation method is low in difficulty, thereby ensuring the stability of the oil-gas separation component 3 on the static plate 1 and reducing the influence of vibration and shaking on the oil-gas separation effect.

[0033] like Figure 1 and Figure 3As shown, in at least one embodiment, positioning is carried out by the shape of the upper surface of the stationary disk 1 and the shape of the groove 2. The positioning part 10 is in interference fit with the groove 2. The oil-gas separation device is installed by the method of pressing and importing. After installation, the upper surface of the positioning part 10 and the upper surface of the inner groove of the stationary disk 1 are in the same plane. The installation is firm, the processing difficulty is low, which is beneficial to the installation and maintenance of the oil-gas separation component 3, and it is convenient to replace when the positioning part 10 or the stationary disk 1 is damaged. By simplifying the structure of the rear cover 15, it is convenient for the rear cover 15 to be docked and installed with the air-conditioning system, and the adaptability of the electric compressor to different installation environments is improved.

[0034] As Figure 1 and Figure 2 shown, a throttle tube 11 is arranged in the reflux channel 7. The throttle tube 11 is hermetically connected to the inner wall of the reflux channel 7 to prevent lubricating oil from leaking, ensuring that the lubricating oil returns to the oil sump 16 along the reflux channel 7. A filter screen is provided at one end of the throttle tube 11. The filter screen can filter impurities in the reflux channel 7, avoiding impurities from entering the oil sump 16 and affecting the quality of the lubricating oil and the normal operation of the compressor, and ensuring the cleanliness of the lubricating oil.

[0035] As Figure 1 and Figure 3 shown, a separation air inlet 12 is provided on the side wall at one end of the first tube body 8, and a separation oil outlet 13 is provided on the side wall at the other end of the first tube body 8. The separation cavity 4 is communicated with the compression cavity 6 through the separation air inlet 12, and the separation cavity 4 is communicated with the reflux channel 7 through the separation oil outlet 13, realizing the communication between the separation cavity 4, the compression cavity 6 and the reflux channel 7. The compressed refrigerant gas can enter the separation cavity 4 through the separation air inlet 12 for oil-gas separation, and the separated lubricating oil enters the reflux channel 7 through the separation oil outlet 13 and finally returns to the oil sump 16, ensuring the progress of the oil-gas separation process and enabling the normal operation of the oil-gas cycle.

[0036] Working principle: When the electric compressor operates, the moving disk 5 and the stationary disk 1 move relative to each other, so that the refrigerant gas in the compression cavity 6 is compressed. The compressed high-pressure refrigerant gas enters the separation cavity 4 of the oil-gas separation component 3 through the separation air inlet 12. In the separation cavity 4, due to the structures of the first tube body 8 and the second tube body 9, the gas flow will cause the lubricating oil to obtain a certain inertial force. The lubricating oil is thrown towards the inner wall of the separation cavity 4 under the centrifugal action of the second tube body 9. The structure of the separation cavity 4 is arranged so that the lubricating oil can move along the inner wall, thus realizing the preliminary separation of the lubricating oil and the refrigerant. The separated refrigerant gas is discharged from the separation cavity 4 through the exhaust cavity and the exhaust channel, and the separated lubricating oil enters the reflux channel 7 through the separation oil outlet 13 and returns to the oil sump 16 through the throttle tube 11.

[0037] Installation steps: Install the oil-gas separation component 3 formed by combining the first pipe body 8, the second pipe body 9, and the positioning portion 10 into the groove 2 on the static disk 1. One end of the second pipe body 9 is communicated with the separation cavity 4, and the other end of the second pipe body 9 is installed and connected to the inner wall of the first pipe body 8.

[0038] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil-gas separation device, characterized in that: The oil-gas separation device is arranged on a static plate (1), a groove (2) is provided on the static plate (1), and a compression chamber (6) is formed between the static plate (1) and the dynamic plate (5); The oil-gas separation device comprises an oil-gas separation component (3), and the oil-gas separation component (3) is arranged in the groove (2); The oil-gas separation component (3) comprises a separation chamber (4), one side of the separation chamber (4) is connected to a compression chamber (6), and the other side of the separation chamber (4) is connected to a reflux channel (7).

2. The oil-gas separation device according to claim 1, characterized in that: The oil-gas separation component (3) further comprises a first tube body (8) and a second tube body (9) which are arranged in the groove (2), and the separation chamber (4) is formed between the first tube body (8) and the second tube body (9).

3. The oil-gas separation device according to claim 2, characterized in that: The air outlet end of the first tube body (8) is fixedly connected to a positioning portion (10), and the positioning portion (10) is detachably connected to the static disk (1).

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

5. The oil-gas separation device according to claim 3, characterized in that: The positioning portion (10) is interference-fitted with the groove (2), and the upper surface of the positioning portion (10) and the upper surface of the stator (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 arranged in the reflux channel (7), the throttling tube (11) is sealedly connected to the inner wall of the reflux channel (7), and a filter screen is arranged at one end of the throttling tube (11).

7. The oil-gas separation device according to claim 2, characterized in that: A separation air inlet (12) is provided on the side wall at one end of the first tube body (8), and a separation oil outlet (13) is provided on the side wall at the other end of the first tube body (8); the separation chamber (4) and the compression chamber (6) are connected via the separation air inlet (12), and the separation chamber (4) and the reflux channel (7) are connected via the separation oil outlet (13).

8. An electric compressor comprising an oil-gas separation device according to any one of claims 2 to 7, characterized in that: It also includes a front cover (14), a rear cover (15) and a cylinder body, wherein the static plate (1) is arranged in the cylinder body, the dynamic plate (5) and the static plate (1) are located between the front cover (14) and the rear cover (15), and the rear cover (15) is provided with an exhaust cavity and an exhaust channel.

9. The electric compressor according to claim 8, characterized in that: An oil pool (16) is provided on the inner side wall of the cylinder body, and the oil pool (16) is communicated with a reflux channel (7), and the reflux channel (7) is located at the bottom of the electric compressor.

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