Compressor oil separator, compressor and refrigeration system

Abstract

The present invention relates to the field of refrigeration technology, and discloses an oil separator for a compressor, a compressor, and a refrigeration system. The oil separator (10) is arranged in the compressor, and comprises an oil separation chamber (120) and an oil outlet (122) and a gas outlet (123) communicated with the oil separation chamber (120). The oil outlet (122) is located at the bottom of the oil separation chamber (120), and the gas outlet (123) is located at the top of the oil separation chamber (120). The oil separator (10) comprises an oil return pipe (14) connected to the oil outlet (122), and the outlet pressure of the oil return pipe (14) is equal to the pressure of the gas outlet (123). The oil separator of the present invention can improve the oil-gas separation efficiency, reduce the oil discharge rate, and improve the compressor performance.

Description

Technical Field

[0001] The invention relates to the technical field of refrigeration, and in particular to an oil separator for a compressor, a compressor containing the oil separator, and a refrigeration system containing the compressor. Background Art

[0002] Compressors are usually used in refrigeration systems, such as car air conditioners or household air conditioners. During the operation of the compressor, the friction and heat generation of the compression mechanism are serious, and refrigeration lubricating oil is needed to lubricate and cool the compression mechanism to improve the reliability of the compressor operation. However, since the lubricating oil and the refrigerant have a certain degree of miscibility, and the refrigerant discharged from the compression mechanism into the compressor cavity is in a high temperature and high pressure state, the refrigerant will bring out part of the lubricating oil when it is discharged from the compressor cavity to the outside of the compressor, which not only reduces the amount of lubricating oil in the compressor and affects the lubrication and cooling of the compression mechanism, but also the lubricating oil discharged with the refrigerant will enter the refrigeration system together with the refrigerant, and the lubricating oil will form an oil film in the condenser and evaporator, thereby affecting the heat exchange performance of the refrigeration system.

[0003] In order to solve the above problems, an oil-gas separation device is usually installed in the compressor to separate the high-pressure oil-gas mixture discharged from the compression mechanism, so that the separated oil returns to the oil pool, and the separated gas is discharged through the exhaust port of the compressor. However, due to the small space of the car, the weight and volume requirements of the compressor are relatively strict, requiring the compressor to be small in size and light in weight. However, a compressor with too small a volume will reduce the internal space of the compressor. The reduction in the internal space of the compressor will cause the compressor to have less oil sealing and a smaller oil-gas separation space, making it impossible to install the oil-gas separation device or the installed oil-gas separation device cannot effectively separate the oil and gas, resulting in a large amount of oil discharge from the compressor, an unstable oil level, and a large exhaust resistance of the compressor. In addition, it will cause the heat exchange efficiency of the condenser and evaporator to decrease, affecting the heat exchange capacity and customer experience of the automobile air-conditioning system. Summary of the invention

[0004] The object of the present invention is to provide an oil separator for a compressor, a compressor containing the oil separator and a refrigeration system containing the compressor in order to improve the oil-gas separation efficiency, reduce the oil discharge rate and improve the compressor performance in view of the above problems.

[0005] In order to achieve the above object, the present invention provides a compressor oil separator in a first aspect.

[0006] The oil separator is arranged in the compressor, and the oil separator includes an oil separation chamber and an oil outlet and a gas outlet communicated with the oil separation chamber, the oil outlet is located at the bottom of the oil separation chamber, and the gas outlet is located at the top of the oil separation chamber. The oil separator includes an oil return pipe connected to the oil outlet, and the outlet pressure of the oil return pipe is equal to the pressure of the gas outlet.

[0007] Preferably, the oil separator includes a first shell and a second shell connected to each other, the first shell defines an exhaust muffler chamber, the first shell is provided with an air inlet and an air outlet connected to the exhaust muffler chamber, the second shell defines the oil separation chamber, the oil outlet and the gas outlet are provided on the second shell, and the second shell is also provided with an oil and gas inlet connecting the air outlet and the oil separation chamber.

[0008] Preferably, the first shell is formed in a disc shape, the second shell is fixed to the back of the first shell, and the oil separation chamber includes a cylindrical cavity extending along an axial direction perpendicular to the first shell.

[0009] Preferably, the oil separator includes an exhaust pipe sealed and inserted into the oil separation chamber from the gas outlet, a gap is provided between the bottom end of the exhaust pipe and the bottom wall of the oil separation chamber, a radial gap is provided between the exhaust pipe and the second shell, and the oil and gas inlet is located at the upper part of the oil separation chamber.

[0010] Preferably, the ratio of the length H2 of the exhaust pipe to the height H1 of the oil separation chamber is 0.2-0.5, and / or the ratio of the inner diameter D1 of the exhaust pipe to the diameter D3 of the oil separation chamber is 0.2-0.5.

[0011] Preferably, the ratio of the inner diameter D2 of the oil return pipe to the inner diameter D1 of the exhaust pipe is 0.6-0.9.

[0012] Preferably, the oil return pipe includes an arc segment extending from the oil outlet along the outer circumference of the first housing and a horizontal segment extending from an end of the arc segment along the axial direction of the first housing toward a side away from the second housing.

[0013] Preferably, the end of the arc segment is at the same height as the gas outlet, or the end of the arc segment is higher than the gas outlet.

[0014] A second aspect of the present invention provides a compressor, comprising a compressor housing having a cavity defined therein and a compression mechanism disposed in the cavity, the compressor comprising the above-mentioned compressor oil separator, the oil separator being disposed in the cavity and installed at one end of the compression mechanism, an exhaust port communicating with the cavity being disposed at the top of the compressor housing, an oil pool being disposed at the bottom of the cavity, the oil return pipe being communicated with the oil pool, and the gas outlet being communicated with the exhaust port.

[0015] A third aspect of the present invention provides a refrigeration system, comprising the compressor described above.

[0016] The oil separator of the present invention optimizes the oil separation and oil return structure so that the oil outlet and the gas outlet are located on opposite sides of the oil separation chamber, respectively, and the outlet pressure of the oil return pipe is equal to the pressure of the gas outlet, which can effectively improve the oil and gas separation efficiency, reduce the oil discharge rate, and improve the compressor performance.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a front view of an embodiment of the oil separator of the present invention;

[0020] Figure 2 yes Figure 1 Left view of

[0021] Figure 3 yes Figure 1 Schematic diagram of the structure of the middle oil return pipe;

[0022] Figure 4 yes Figure 2 Schematic diagram of the oil separator installed on the compression mechanism;

[0023] Figure 5 yes Figure 4 AA section view;

[0024] Figure 6 is a cross-sectional view of the compressor.

[0025] Description of Reference Numerals

[0026] 10 Oil separator 11 First housing

[0027] 110 Exhaust silencer 111 Air inlet

[0028] 112 Air outlet 113 Mounting hole

[0029] 12 Second housing 120 Oil separation chamber

[0030] 121 Oil and gas inlet 122 Oil outlet

[0031] 123 Gas outlet 13 Exhaust pipe

[0032] 14 Oil return pipe 141 arc section

[0033] 142 Horizontal section 20 compressor

[0034] 21 Compressor housing 211 Exhaust port

[0035] 22 Compression mechanism 221 Bearing

[0036] 222 Opening 23 Oil pool DETAILED DESCRIPTION

[0037] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0038] In the present invention, unless otherwise stated, the directional words such as "upper, lower, top, bottom" generally refer to the upper, lower, top, bottom in the installed and used state. "Inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0039] A first aspect of the present invention provides an oil separator for a compressor, wherein the oil separator 10 is arranged in the compressor, and the oil separator 10 includes an oil separation chamber 120 and an oil outlet 122 and a gas outlet 123 connected to the oil separation chamber 120, wherein the oil outlet 122 is located at the bottom of the oil separation chamber 120, and the gas outlet 123 is located at the top of the oil separation chamber 120, and the oil separator 10 includes an oil return pipe 14 connected to the oil outlet 122, and the outlet pressure of the oil return pipe 14 is equal to the pressure of the gas outlet 123.

[0040] The oil separator 10 of the present invention optimizes the oil separation and oil return structure so that the oil outlet 122 and the gas outlet 123 are located on opposite sides of the oil separation chamber 120, respectively, so that the outlet pressure of the oil return pipe 14 is equal to the pressure of the gas outlet 123. When the oil separator 10 is set in the compressor, the outlet end of the oil return pipe 14 and the gas outlet 123 can both be located in the exhaust chamber of the compressor, thereby effectively improving the oil-gas separation efficiency, reducing the oil discharge rate, and improving the compressor performance.

[0041] According to one embodiment of the present invention, Figure 1 As shown, the oil separator 10 may include a first shell 11 and a second shell 12 connected to each other, the first shell 11 defines an exhaust muffler chamber 110, the first shell 11 is provided with an air inlet 111 and an air outlet 112 communicating with the exhaust muffler chamber 110, the second shell 12 defines the oil separation chamber 120, the oil outlet 122 and the gas outlet 123 are provided on the second shell 12, and the second shell 12 is also provided with an oil and gas inlet 121 communicating with the air outlet 112 and the oil separation chamber 120. The first shell 11 may be provided with a mounting hole 113, and the first shell 11 can be sleeved on the bearing 221 of the compressor 20 through the mounting hole 113.

[0042] The present invention integrates the oil separation chamber 120 and the exhaust silencer chamber 110 into one to form an independent component, thereby improving the utilization rate of the internal space of the compressor, simplifying the built-in mechanism of the oil separator, reducing costs, and improving the oil-gas separation efficiency; by providing a mounting hole 113 on the first shell 11, it is possible to facilitate the assembly of the oil separator 10 and the compressor bearing 221, thereby realizing the rational utilization of the internal space of the compressor.

[0043] It can be understood that during the use of the above-mentioned oil separator 10, the high-pressure oil-gas mixture generated in the compressor first enters the exhaust silencer chamber 110 through the air inlet 111 of the first shell 11 for rectification, and then enters the oil separation chamber 120 from the air outlet 112 through the oil and gas inlet 121 of the second shell 12 for oil and gas separation. The separated oil is discharged from the oil outlet 122 at the bottom of the oil separation chamber 120 through the return oil pipe 14 to the oil pool of the compressor, and the separated gas is discharged from the gas outlet 123 at the top of the oil separation chamber 120, and finally discharged out of the compressor through the exhaust port of the compressor.

[0044] In the above description, the oil outlet 122 is preferably located at the middle position of the bottom of the oil separation chamber 120 .

[0045] In the present invention, the first shell 11 and the second shell 12 can have any suitable shape and position relationship. According to an embodiment of the present invention, Figure 1 As shown, the first housing 11 is formed into a disc shape, the mounting hole 113 can be located at the center of the first housing 11, and the second housing 11 is fixed to the back of the first housing 11 (ie, the side away from the disc opening, see Figure 2The oil separation chamber 120 includes a cylindrical cavity extending in an axial direction perpendicular to the first housing 11. In this way, the oil separator 10 can better adapt to the internal space of the compressor and improve the oil-gas separation efficiency. In addition, the oil separation chamber 120 may also include a tapered conical cavity located below the cylindrical cavity and coaxially connected to the cylindrical cavity (see Figure 5 ).

[0046] Furthermore, if Figure 5 and Figure 6 As shown, the oil separator 10 includes an exhaust pipe 13 which is sealed and inserted into the oil separation chamber 120 from the gas outlet 123, a gap is provided between the bottom end of the exhaust pipe 13 and the bottom wall of the oil separation chamber 120, a radial gap is provided between the exhaust pipe 13 and the second shell 11, and the oil-gas inlet 121 is located at the upper part of the oil separation chamber 120. When oil-gas separation is performed, the high-pressure oil-gas mixture entering the oil separation chamber 120 is discharged from the oil-gas inlet 121 toward the outer wall of the exhaust pipe 13 located in the oil separation chamber 120, and swirls in a spiral form in the radial gap between the exhaust pipe 13 and the second shell 11. Under the action of centrifugal force and gravity, the lubricating oil is separated from the oil-gas mixture, flows downward along the inner wall of the second shell 12 to the bottom of the oil separation chamber 120 and is discharged through the oil outlet 122, and the separated gas enters the exhaust pipe 13 through the bottom port of the exhaust pipe 13 and is discharged upward.

[0047] In order to further improve the oil-gas separation efficiency, the ratio of the length H2 of the exhaust pipe 13 to the height H1 of the oil separation chamber 120 can be 0.2-0.5; the ratio of the inner diameter D1 of the exhaust pipe 13 to the diameter D3 of the oil separation chamber 120 can be 0.2-0.5 (see Figure 5 ).

[0048] In addition, in the present invention, in order to improve the oil-gas separation efficiency, the inner diameter of the oil return pipe 14 can be smaller than the inner diameter of the exhaust pipe 13, for example, the ratio of the inner diameter D2 of the oil return pipe 14 to the inner diameter D1 of the exhaust pipe 13 is 0.6-0.9.

[0049] In the above, the oil return pipe 14 can have any shape as long as it can smoothly guide the lubricating oil flowing out of the oil outlet 122 to be discharged into the oil pool of the compressor. Figure 2 and Figure 3As shown, the oil return pipe 14 includes an arc segment 141 extending from the oil outlet 122 along the outer periphery of the first housing 11 and a horizontal segment 142 extending from the end of the arc segment 141 along the axial direction of the first housing 11 toward the side away from the second housing 12. Through the above arrangement, the outlet end of the oil return pipe 14 can be higher than the oil level of the oil pool and away from the gas outlet 123, and the oil return outlet pressure is equal to the gas outlet pressure. The oil return pipe 14 can further separate the lubricating oil entering therein (because the oil flowing out of the oil outlet 122 will more or less carry some gas). Specifically, the oil and gas are separated while flowing in the oil return pipe 14, and the separated gas is discharged upward from the end port of the horizontal segment 142, and the separated oil is discharged downward from the end port of the horizontal segment 142.

[0050] Preferably, the end of the arc segment 141 is located at the same height as the gas outlet 123 , or the end of the arc segment 141 is higher than the gas outlet 123 .

[0051] In the present invention, the first shell 11 and the second shell 12 can be connected in any manner. Preferably, the first shell 11 and the second shell 12 form an integral structure.

[0052] A second aspect of the present invention provides a compressor, wherein the compressor 20 includes a compressor housing 21 having a cavity defined therein and a compression mechanism 22 disposed in the cavity, wherein the compressor 20 includes the above-mentioned compressor oil separator 10, wherein the oil separator 10 is disposed in the cavity and installed at one end of the compression mechanism 22.

[0053] By installing the oil separator 10 in the compressor 20, the internal space thereof can be reasonably utilized, and the oil-gas separation can be effectively realized, thereby reducing the oil discharge volume and the exhaust resistance of the compressor and improving the performance of the compressor.

[0054] Among them, Figure 6 As shown, the compressor housing 21 is provided with an air intake port (not shown) and an air exhaust port 211 which are connected to the cavity, the compression mechanism 22 includes a bearing 221 and a cylinder (not shown), the oil separator 10 is sleeved on the bearing 221 through the mounting hole 113 so that the first housing 11 and the bearing 221 together define the exhaust muffler chamber 110, the cylinder is connected to the exhaust muffler chamber 110 through the air intake port 111 of the first housing 11, the oil return pipe 14 is connected to the oil pool 23 located at the bottom of the cavity, and the gas outlet 123 is connected to the exhaust port 211.

[0055] In the above, it can be understood that the cylinder has an air intake inlet connected to the air intake port and an exhaust outlet connected to the air inlet 111. When in use, the low-pressure refrigerant outside the compressor 20 enters the cylinder of the compression mechanism 22 through the air intake port and the air intake inlet in turn, and after being compressed into a high-pressure refrigerant in the cylinder, it is discharged into the exhaust muffler chamber 110 through the exhaust outlet, the opening 222 on the bearing 221, and the air inlet 111, and then enters the oil separation chamber 120 through the air outlet 112 and the oil and gas inlet 121 for centrifugal separation, and the separated lubricating oil is discharged into the oil pool 23 through the oil return pipe 14, and the separated gas is discharged from the compressor 20 through the exhaust pipe 13 and the exhaust port 211.

[0056] The compressor 20 of the present invention can be a horizontal rotary compressor, wherein the cavity can be divided into a high-pressure cavity and a low-pressure cavity by a partition plate, a motor is arranged in the low-pressure cavity, the compression mechanism 22 and the oil separator 10 are arranged in the high-pressure cavity, the oil pool 23 is located in the lower part of the high-pressure cavity, the upper part of the high-pressure cavity is the exhaust cavity, the air intake port of the compressor housing 21 is connected with the low-pressure cavity, the exhaust port 211 of the compressor housing 21 is connected with the high-pressure cavity and is located at the top of the high-pressure cavity, the oil outlet 122 of the oil separator 10 is toward the oil pool 23, the gas outlet 123 is toward the exhaust port 211 of the compressor housing 21, and the outlet end of the oil return pipe 14 is located in the exhaust cavity.

[0057] The third aspect of the present invention provides a refrigeration system, the refrigeration system comprising the compressor described above. The refrigeration system may be an automobile air conditioning system, a household air conditioning system, or the like.

[0058] The refrigeration system may include a condenser and an evaporator, and the compressor 20 is connected between the condenser and the evaporator. The refrigeration system of the present invention can effectively improve the heat exchange efficiency of the condenser and the evaporator and improve the refrigeration effect of the refrigeration system by using the compressor 20.

[0059] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0060] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0061] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An oil separator for a compressor, characterized in that: The oil separator (10) is arranged in the compressor, and comprises an oil separation chamber (120) and an oil outlet (122) and a gas outlet (123) communicated with the oil separation chamber (120), the oil outlet (122) is located at the bottom of the oil separation chamber (120), and the gas outlet (123) is located at the top of the oil separation chamber (120), and the oil separator (10) comprises an oil return pipe (14) connected to the oil outlet (122), and the outlet pressure of the oil return pipe (14) is equal to the pressure of the gas outlet (123); The oil separator (10) comprises a first shell (11) and a second shell (12) connected to each other, the first shell (11) defining an exhaust muffler chamber (110), the first shell (11) being provided with an air inlet (111) and an air outlet (112) communicating with the exhaust muffler chamber (110), the second shell (12) defining an oil separation chamber (120), the oil outlet (122) and the gas outlet (123) being provided on the second shell (12), and the second shell (12) being further provided with an oil and gas inlet (121) communicating with the air outlet (112) and the oil separation chamber (120).

2. The compressor oil separator according to claim 1, characterized in that: The first shell (11) is formed in a disc shape, the second shell (12) is fixed to the back of the first shell (11), and the oil separation chamber (120) comprises a cylindrical cavity extending along an axial direction perpendicular to the first shell (11).

3. The compressor oil separator according to claim 2, characterized in that: The oil separator (10) comprises an exhaust pipe (13) which is sealed and inserted into the oil separation chamber (120) from the gas outlet (123); a gap is provided between the bottom end of the exhaust pipe (13) and the bottom wall of the oil separation chamber (120); a radial gap is provided between the exhaust pipe (13) and the second shell (12); and the oil and gas inlet (121) is located at the upper part of the oil separation chamber (120).

4. The compressor oil separator according to claim 3, characterized in that: The ratio of the length H2 of the exhaust pipe (13) to the height H1 of the oil separation chamber (120) is 0.2-0.5, and / or The ratio of the inner diameter D1 of the exhaust pipe (13) to the diameter D3 of the oil separation chamber (120) is 0.2-0.

5.

5. The compressor oil separator according to claim 3, characterized in that: The ratio of the inner diameter D2 of the oil return pipe (14) to the inner diameter D1 of the exhaust pipe (13) is 0.6-0.

9.

6. The compressor oil separator according to any one of claims 2 to 5, characterized in that: The oil return pipe (14) comprises an arcuate section (141) extending from the oil outlet (122) along the outer periphery of the first housing (11) and a horizontal section (142) extending from the end of the arcuate section (141) along the axial direction of the first housing (11) toward a side away from the second housing (12).

7. The compressor oil separator according to claim 6, characterized in that: The end of the arc segment (141) is located at the same height as the gas outlet (123), or the end of the arc segment (141) is higher than the gas outlet (123).

8. A compressor, the compressor (20) comprising a compressor housing (21) defining a cavity therein and a compression mechanism (22) disposed in the cavity, characterized in that: The compressor (20) comprises the compressor oil separator (10) according to any one of claims 1 to 7, wherein the oil separator (10) is arranged in the chamber and mounted on one end of the compression mechanism (22). The top of the compressor housing (21) is provided with an exhaust port (211) connected to the cavity, the bottom of the cavity is provided with an oil pool (23), the oil return pipe (14) is connected to the oil pool (23), and the gas outlet (123) is connected to the exhaust port (211).

9. A refrigeration system, characterized in that: The refrigeration system comprises the compressor of claim 8.

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