A fully sealed horizontal scroll compressor with exhaust oil filter structure

Abstract

The present invention discloses a fully enclosed horizontal scroll compressor with an exhaust oil filter structure. The compressor comprises a housing and a bearing support plate mounted at one end within the housing. The bearing support plate and the housing form an exhaust chamber, the bottom of which is provided with an oil pool. An exhaust pipe connected to the exhaust chamber is mounted on the housing. The bearing support plate is provided with a gas passage. The exhaust chamber is provided with an exhaust oil filter structure for filtering lubricating oil from gas flowing from the exhaust chamber into the exhaust pipe. The exhaust oil filter structure improves oil return and lubrication of the compressor, thereby extending the service life of the compressor and enhancing its operational reliability.

Description

Technical Field

[0001] The invention relates to the technical field of scroll compressors, and in particular to a fully sealed horizontal scroll compressor with an exhaust oil filter structure. Background Art

[0002] A scroll compressor is a type of compressor that is composed of a fixed scroll and a movable scroll. Figure 1 and 2 As shown, the fixed and orbiting scrolls have involute profiles with identical parameters, but are 180° apart during installation, and the orbiting scroll meshes with the fixed scroll at the rotation radius. During compressor operation, the crankshaft carries the orbiting scroll in circular translation around the fixed scroll: the intake port is always connected to the outside world, in the intake state; the gas drawn into the scroll compression chamber is continuously compressed, increasing its pressure; and high-pressure gas enters the exhaust high-pressure chamber in the compressor housing through the exhaust port at the center of the fixed scroll. Furthermore, these processes can all occur simultaneously within a single crankshaft revolution, so the intake and exhaust processes of a scroll compressor can be considered continuous.

[0003] As the crankshaft rotates, compressed gas is continuously drawn from the scroll compression chamber into the high-pressure exhaust chamber. Due to the high temperature and high pressure of the compressed gas, the lubricating oil on the oil sump surface near the compressed gas foams, which then follows the compressed gas along the airflow path toward the exhaust port. Furthermore, the lubricating oil discharged from the compressor's lubrication system also foams under the influence of the compressed gas, and the resulting lubricating oil foam also follows the compressed gas along the airflow path toward the exhaust port. During compressor operation, the bearing support plate causes the oil level in the oil sump in the exhaust chamber to be higher than the oil level in the high-pressure exhaust chamber. The compressed gas foams the lubricating oil in the exhaust chamber, creating foam closer to the exhaust pipe and making it more likely to be carried out of the compressor by the airflow. This foaming can cause oil starvation in the compressor, leading to failure modes such as wear, increased vibration and noise, and crankshaft locking under variable frequency operation or other harsh operating conditions. Summary of the Invention

[0004] The object of the present invention is to provide a fully enclosed horizontal scroll compressor with an exhaust oil filter structure, so as to mainly solve the above-mentioned problems.

[0005] To achieve the above-mentioned objectives, the present invention discloses a fully enclosed horizontal scroll compressor with an exhaust oil filtering structure, comprising a shell and a bearing support plate installed at one end of the shell, the bearing support plate and the shell forming an exhaust cavity, an oil pool being provided at the bottom of the exhaust cavity, an exhaust pipe connected to the exhaust cavity being installed on the shell, a gas channel being provided on the bearing support plate, and an exhaust oil filtering structure being provided in the exhaust cavity for filtering lubricating oil from the gas flowing from the exhaust cavity into the exhaust pipe.

[0006] Furthermore, the exhaust oil filter structure divides the exhaust chamber into a first air chamber, a second air chamber and a third air chamber that are connectable. The oil pool is located on the lower side of the first air chamber, the exhaust pipe is connected to the third air chamber, and the gas channel is connected to the second air chamber. The exhaust oil filter structure is provided with an oil filter hole connecting the second air chamber and the third air chamber.

[0007] Furthermore, the exhaust oil filter structure includes a partition plate and an oil filter plate provided with the oil filter holes, the partition plate is located above the first air chamber, and the oil filter plate divides the part of the exhaust chamber located above the first air chamber into the second air chamber and the third air chamber.

[0008] Furthermore, at least one side of the partition plate is provided with a gap for draining oil into the oil pool.

[0009] Furthermore, the oil filter holes on the oil filter plate close to the gas channel have smaller diameters than the oil filter holes away from the gas channel.

[0010] Furthermore, the exhaust oil filter structure also includes a first connecting plate and a second connecting plate arranged on the same side of the partition plate, one end of the first connecting plate is connected to one end of the partition plate, and the other end is connected to one end of the oil filter plate, one end of the second connecting plate is connected to the other end of the partition plate, and the first connecting plate and the second connecting plate are provided with connecting holes for connecting the bearing support plate.

[0011] Furthermore, the first connecting plate, the second connecting plate, the partition plate and the oil filter plate are an integrated bent structure.

[0012] Furthermore, the partition plate is arranged to be inclined downward from one end close to the exhaust pipe to the other end.

[0013] Furthermore, the other end of the oil filter plate abuts against the partition plate, and the other end of the oil filter plate is provided with an oil groove.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The present invention effectively separates gas and lubricating oil through an exhaust oil filter structure, reducing the amount of oil discharged from the compressor and the amount of lubricating oil circulating in the refrigeration system. This prevents the heat exchange efficiency of the heat exchanger from being reduced due to the oil, thereby improving the refrigeration efficiency of the system. At the same time, the lubricating oil is kept circulating only within the compressor, ensuring the oil circulation volume of the compressor lubrication system, preventing the compressor from malfunctioning due to oil shortage. At the same time, since all moving parts are effectively lubricated, the friction power consumption of the compressor is also reduced, the efficiency is increased, the service life of the compressor is extended, and the reliability of the compressor operation is improved.

[0016] The present invention will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a cross-sectional schematic diagram of a fully enclosed horizontal scroll compressor with an exhaust oil filter structure disclosed in the prior art;

[0019] Figure 2 yes Figure 1 AA cross-sectional view of ;

[0020] Figure 3 It is an axonometric diagram of the exhaust oil filter structure disclosed in the preferred embodiment of the present invention;

[0021] Figure 4 Schematic diagram of the installation of the exhaust oil filter structure disclosed in the preferred embodiment of the present invention on the compressor;

[0022] Figure 5 yes Figure 4 BB cross-sectional diagram.

[0023] Legend:

[0024] 1. Shell; 101. Tube shell; 102. Front head; 103. Rear head; 2. Bearing support plate; 21. Gas channel; 3. Exhaust chamber; 31. First air chamber; 32. Second air chamber; 33. Third air chamber; 34. Gap; 4. Oil pool; 5. Exhaust pipe; 6. Exhaust oil filter structure; 61. Oil filter hole; 62. Partition plate; 63. Oil filter plate; 64. First connecting plate; 65. Second connecting plate; 66. Connecting hole; 67. Oil trough; 7. Scroll assembly; 8. Frame; 9. Crankshaft; 10. Motor; 11. Oil pump; 12. Screws. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0026] like Figure 3-5 As shown, the embodiment of the present invention discloses a fully enclosed horizontal scroll compressor with an exhaust oil filter structure, the main structure of which is similar to Figure 1-2The existing fully enclosed horizontal scroll compressor shown is the same as that shown, and includes a shell 1 and a bearing support plate 2 installed at one end of the shell 1. In addition, a scroll assembly 7 (including a fixed scroll and a movable scroll), a frame 8, a crankshaft 9, a motor 10, and an oil pump 11 are also installed in the shell 1. Specifically, the shell 1 includes a central tube shell 101 and a front head 102 and a rear head 103 on both sides. The frame 8 is installed at one end of the tube shell 101, and the bearing support plate 2 is installed at the other end. Both ends of the crankshaft 9 are pivotally connected to the frame 8 and the bearing support plate 2. The oil pump 11 is installed on the bearing support plate 2. An exhaust chamber 3 is formed between the bearing support plate 2 and the rear head 103 of the shell 1. An oil pool 4 is provided at the bottom of the exhaust chamber 3. An exhaust pipe 5 that can be connected to the exhaust chamber 3 is installed on the shell 1. A gas channel 21 is provided on the bearing support plate 2, which is a plurality of passages. Hole, an exhaust oil filter structure 6 is provided in the exhaust chamber 3 for filtering lubricating oil from the gas flowing into the exhaust pipe 5 from the exhaust chamber 3. The exhaust oil filter structure 6 can be a hole structure on a filtering plane or a spatial curved surface. The hole structure can be arranged on a plane or a spatial curved surface. The spatial curved surface structure can increase the surface area of the oil filter. The gas coming out of the gas channel 21 passes through the hole structure on the plane or the spatial curved surface, which is more conducive to the condensation of the lubricating oil, thereby effectively separating the gas and oil through the exhaust oil filter structure 6, thereby reducing the amount of oil discharged from the compressor.

[0027] In this embodiment, the exhaust oil filter structure 6 divides the exhaust chamber 3 into a first air chamber 31, a second air chamber 32 and a third air chamber 33 that are connectable. The oil pool 4 is located on the lower side of the first air chamber 31, the exhaust pipe 5 is connected to the third air chamber 33, and the gas channel 21 is connected to the second air chamber 32. The exhaust oil filter structure 6 is provided with an oil filter hole 61 that connects the second air chamber 32 and the third air chamber 33. When the gas enters the third air chamber 33 from the second air chamber 32, the oil filter hole 61 on the exhaust oil filter structure 6 is filtered. Specifically, the exhaust oil filter structure 6 includes The partition plate 62 and the oil filter plate 63 with oil filter holes 61 are located above the first air chamber 31. The oil filter plate 63 divides the portion of the exhaust chamber 3 above the first air chamber 31 into the second air chamber 32 and the third air chamber 33. The oil filter holes 61 on the oil filter plate 63 near the gas passage 21 have smaller diameters than those farther from the gas passage 21. This is because as gas flows through the gas passage 21 and out of the oil filter plate 63, the lubricating oil content in the gas gradually decreases with distance from the gas passage 21. Therefore, the proximal holes are smaller and the distal holes are larger. The partition plate 62 is a non-porous plate, effectively preventing lubricating oil foam in the oil pool 4 from entering the second air chamber 32 or the third air chamber 33.

[0028] In this embodiment, in order to achieve the installation and fixation of the exhaust oil filter structure 6, the exhaust oil filter structure 6 also includes a first connecting plate 64 and a second connecting plate 65 arranged on the same side of the partition plate 62. One end of the first connecting plate 64 is connected to one end of the partition plate 62, and the other end is connected to one end of the oil filter plate 63. One end of the second connecting plate 65 is connected to the other end of the partition plate 62. The first connecting plate 64 and the second connecting plate 65 are provided with connecting holes 66 for connecting to the bearing support plate 2, so that they are fixed by screws 12 passing through the connecting holes 66. Among them, the first connecting plate 64, the second connecting plate 65, the partition plate 62 and the oil filter plate 63 are an integrated bent molding structure, thereby improving the processing efficiency and manufacturing cost of the exhaust oil filter structure 6. Optionally, the exhaust oil filter structure 6 can also be selected by welding, such as welding the partition plate 62 to the inner wall of the rear head 103.

[0029] In this embodiment, one end of the partition plate 62 close to the exhaust pipe 5 is tilted downward toward the other end. The tilted installation method to the lower right is more conducive to the lubricating oil separated below the partition plate 62 dripping into the oil pool 4, reducing the possibility of the lubricating oil re-foaming with the gas flow and being carried away from the plate surface.

[0030] In this embodiment, in order to promptly discharge the filtered liquid lubricating oil into the oil pool 4 below, a gap 34 for draining the oil into the oil pool 4 is provided on at least one side of the partition plate 62. Specifically, gaps 34 exist between one side of the partition plate 62 and the oil pump 11, and between the other side and the rear head 103. Considering that the lubricating oil separated after filtration accumulates in the third air chamber 33, draining the oil into the oil pool 4 solely through these gaps 34 is inefficient, and oil accumulation will occur in the third air chamber 33. If the accumulated oil is not promptly discharged into the oil pool 4, it may foam in the third air chamber 33 and be directly carried out of the compressor by the airflow. Therefore, an oil flow groove 67 is provided at the other end of the oil filter plate 63. Since the partition plate 62 is tilted downward and rightward, the filtered lubricating oil can promptly pass through the oil flow groove 67 and flow along the partition plate 62 to the oil pool 4, thus preventing oil accumulation in the third air chamber 33.

[0031] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A fully enclosed horizontal scroll compressor with an exhaust oil filter structure, comprising a housing (1) and a bearing support plate (2) mounted at one end of the housing (1), wherein the bearing support plate (2) and the housing (1) form an exhaust cavity (3), an oil pool (4) is provided at the bottom of the exhaust cavity (3), an exhaust pipe (5) connected to the exhaust cavity (3) is mounted on the housing (1), and a gas passage (21) is provided on the bearing support plate (2), characterized in that: An exhaust oil filter structure (6) for filtering lubricating oil from the gas flowing from the exhaust chamber (3) into the exhaust pipe (5) is provided in the exhaust chamber (3); The exhaust oil filter structure (6) divides the exhaust chamber (3) into a first air chamber (31), a second air chamber (32), and a third air chamber (33) that are communicable with each other; the oil pool (4) is located at the lower side of the first air chamber (31); the exhaust pipe (5) is connected to the third air chamber (33); and the gas channel (21) is connected to the second air chamber (32); The exhaust oil filter structure (6) comprises a partition plate (62) and an oil filter plate (63) provided with an oil filter hole (61), wherein the partition plate (62) is located above the first air chamber (31), and the oil filter plate (63) divides the portion of the exhaust cavity (3) located above the first air chamber (31) into the second air chamber (32) and the third air chamber (33), and the oil filter plate (63) is provided with an oil filter hole (61) communicating with the second air chamber (32) and the third air chamber (33); The oil filter holes (61) on the oil filter plate (63) close to the gas channel (21) have a smaller pore size than the oil filter holes (61) away from the gas channel (21); At least one side of the partition plate (62) is provided with a gap (34) for draining oil to the oil pool (4).

2. The fully enclosed horizontal scroll compressor with an exhaust oil filter structure according to claim 1, characterized in that: The exhaust oil filter structure (6) further includes a first connecting plate (64) and a second connecting plate (65) arranged on the same side of the partition plate (62), one end of the first connecting plate (64) being connected to one end of the partition plate (62), and the other end being connected to one end of the oil filter plate (63), one end of the second connecting plate (65) being connected to the other end of the partition plate (62), and a connecting hole (66) for connecting to the bearing support plate (2) being provided on the first connecting plate (64) and the second connecting plate (65).

3. The fully enclosed horizontal scroll compressor with an exhaust oil filter structure according to claim 2, characterized in that: The first connecting plate (64), the second connecting plate (65), the partition plate (62) and the oil filter plate (63) are an integrated bent structure.

4. The fully enclosed horizontal scroll compressor with an exhaust oil filter structure according to any one of claims 1 to 3, characterized in that: One end of the partition plate (62) close to the exhaust pipe (5) is arranged to be inclined downward toward the other end.

5. The fully enclosed horizontal scroll compressor with an exhaust oil filter structure according to claim 4, characterized in that: The other end of the oil filter plate (63) abuts against the partition plate (62), and the other end of the oil filter plate (63) is provided with an oil groove (67).

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