Oil quantity control device and compressor system

Abstract

The utility model discloses an oil mass control device and a compressor system, and the oil mass control device comprises an oil using device, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, an oil separator, an oil storage container, an oil return valve, a bypass valve and an air inlet valve, the oil separator, the oil storage container, the oil return valve, the oil using device and the bypass valve are sequentially arranged on the first pipeline; the first pipeline is connected with a second pipeline and a third pipeline; the two ends of the fourth pipeline are connected with the oil separator and the first pipeline respectively, and the air inlet valve is arranged on the fourth pipeline. Through the application of the oil quantity control device, the oil quantity control device is particularly suitable for oil increasing and decreasing operation of the compressor, the compressor does not need to be shut down in the oil increasing and decreasing process, operation is easy, oil quantity control is accurate, waste of refrigerants and oil liquid is reduced, and the accuracy of the test result of the compressor is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to an oil quantity control device and a compressor system. Background Art

[0002] At present, in the development process of the thermal management system of new energy vehicles, in order to coordinate the control of the compressor and other components, ensure that the system can operate smoothly under different working conditions, and meet the lubrication requirements of the compressor, it is often necessary to conduct an oil return test on the system. In the oil return test, factors such as the amount of oil added and the operating conditions will directly affect the amount of residual oil in the compressor and the amount of refrigeration oil circulating with the refrigerant (i.e., the oil circulation rate).

[0003] In the calibration test to determine the amount of oil to be added, it is often necessary to add oil or pour out the oil in the compressor. In the prior art, this is mainly done by removing the compressor to add oil or pour out the oil. Generally, the refrigerant is discharged first, and then a certain amount of refrigerant oil is directly added or poured out from the air intake port after the compressor is removed. The amount of refrigerant oil added or poured out is determined by weighing or volume conversion, and then the total oil amount in the compressor is determined. After that, the compressor is reinstalled, vacuumed, and filled with refrigerant.

[0004] However, this method has complicated operation steps, discharging refrigerant will cause certain waste, and disassembling and installing pipelines is time-consuming and laborious, wasting a lot of manpower and time. If the installation and connection are not in place, there is a risk of leakage. At the same time, it also involves the use of some special tools, which requires high operating personnel. It is also impossible to determine the residual oil amount in the pipeline and then determine the total oil amount in the system, which affects the accuracy of the test. Utility Model Content

[0005] In view of this, in order to solve the above problems, the purpose of the utility model is to provide an oil quantity control device, including: an oil using device, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, an oil separator, an oil storage container, an oil return valve, a bypass valve and an intake valve;

[0006] The oil separator, the oil storage container, the oil return valve, the oil using device, and the bypass valve are sequentially arranged on the first pipeline;

[0007] The first pipeline is connected to the second pipeline and the third pipeline, one end of the second pipeline is arranged between the oil-using device and the oil return valve, and one end of the third pipeline is arranged between the bypass valve and the oil separator;

[0008] Both ends of the fourth pipeline are connected to the oil separator and the first pipeline respectively, one end of the fourth pipeline connected to the first pipeline is arranged between the bypass valve and the oil using device, and the intake valve is arranged on the fourth pipeline.

[0009] In another preferred embodiment, it further includes: a fifth pipeline and an oil drain valve, wherein the oil drain valve is arranged on the fifth pipeline, one end of the fifth pipeline is connected to the first pipeline, and one end of the fifth pipeline is arranged between the oil return valve and the oil storage container.

[0010] In another preferred embodiment, it further comprises: a filter and a capillary tube, wherein the filter and the capillary tube are sequentially arranged on the first pipeline, and the filter and the capillary tube are arranged between the oil return valve and the oil using device.

[0011] In another preferred embodiment, the oil storage container includes: a transparent tank body, the lower end of the transparent tank body is set in a cone shape, scale lines are set on the outer wall of the transparent tank body, the upper end of the transparent tank body is connected to the oil separator through the first pipeline, and the lower end of the transparent tank body is connected to the oil return valve through the first pipeline.

[0012] In another preferred embodiment, a first pressure sensor is provided on the oil separator, and a second pressure sensor is provided on the first pipeline between the bypass valve and the oil-using device.

[0013] In another preferred embodiment, the oil-using device is a compressor.

[0014] The utility model also aims to provide a compressor system, comprising the oil quantity control device described in any one of the above, characterized in that it also includes: a sixth pipeline, a gas-liquid separator, an expansion valve and a heat exchanger assembly, the two ends of the sixth pipeline are respectively connected to the other end of the second pipeline and the other end of the third pipeline, the heat exchanger assembly, the expansion valve and the gas-liquid separator are arranged on the sixth pipeline in sequence, and the gas-liquid separator is arranged close to the second pipeline relative to the heat exchanger assembly.

[0015] In another preferred embodiment, the heat exchanger assembly includes: a condensing heat exchanger, a subcooling heat exchanger and an evaporating heat exchanger which are sequentially arranged on the sixth pipeline, and the evaporating heat exchanger is arranged close to the gas-liquid separator relative to the condensing heat exchanger.

[0016] In another preferred embodiment, it further comprises: a mass flow meter and an oil circulation rate measuring instrument, wherein the mass flow meter and the oil circulation rate measuring instrument are both arranged on the sixth pipeline.

[0017] In another preferred embodiment, a third pressure sensor is provided on the sixth pipeline, and the third pressure sensor is provided between the gas-liquid separator and the heat exchanger assembly.

[0018] Due to the adoption of the above technical solution, the utility model has the following positive effects compared with the prior art:

[0019] Through the application of the utility model, an oil quantity control device is provided, which is particularly suitable for increasing or decreasing the oil of a compressor. The compressor does not need to be shut down during the oil increase or decrease process. The operation is simple and the oil quantity control is accurate. The waste of refrigerant and oil is reduced, which is conducive to ensuring the accuracy of the results of the compressor test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of an oil quantity control device of the utility model;

[0021] Figure 2 A schematic diagram of vacuuming and refrigerant filling of an oil quantity control device of the utility model;

[0022] Figure 3 This is a schematic diagram of the normal operation of an oil quantity control device of the utility model;

[0023] Figure 4 This is a schematic diagram of oil replenishment of an oil quantity control device of the utility model;

[0024] Figure 5 This is a schematic diagram of oil return of an oil quantity control device of the utility model;

[0025] Figure 6 The utility model is an overall schematic diagram of a compressor system.

[0026] In the attached figure:

[0027] 1. Oil-using device; 2. First pipeline; 3. Second pipeline; 4. Third pipeline; 5. Fourth pipeline; 6. Oil separator; 7. Oil storage container; 8. Oil return valve; 9. Bypass valve; 10. Inlet valve; 11. Fifth pipeline; 12. Oil drain valve; 13. Filter; 14. Capillary tube; 15. Scale line; 16. First pressure sensor; 17. Second pressure sensor; 18. Sixth pipeline; 19. Gas-liquid separator; 20. Expansion valve; 21. Condensing heat exchanger; 22. Subcooling heat exchanger; 23. Evaporating heat exchanger; 24. Mass flow meter; 25. Oil circulation rate measuring instrument; 26. Third pressure sensor. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] like Figure 1 As shown, an oil quantity control device of a preferred embodiment is shown, comprising: an oil-using device 1, a first pipeline 2, a second pipeline 3, a third pipeline 4, a fourth pipeline 5, an oil separator 6, an oil storage container 7, an oil return valve 8, a bypass valve 9 and an intake valve 10; the oil separator 6, the oil storage container 7, the oil return valve 8, the oil-using device 1, and the bypass valve 9 are sequentially arranged on the first pipeline 2; the second pipeline 3 and the third pipeline 4 are connected to the first pipeline 2, one end of the second pipeline 3 is arranged between the oil-using device 1 and the oil return valve 8, and one end of the third pipeline 4 is arranged between the bypass valve 9 and the oil separator 6; both ends of the fourth pipeline 5 are respectively connected to the oil separator 6 and the first pipeline 2, one end of the fourth pipeline 5 connected to the first pipeline 2 is arranged between the bypass valve 9 and the oil-using device 1, and the intake valve 10 is arranged on the fourth pipeline 5. Furthermore, the bypass valve 9 and the intake valve 10 serve as the intake control functional parts of the oil quantity control device, the oil separator 6, the oil storage container 7 and the oil drain valve 12 described below serve as the oil separation and storage functional parts of the oil quantity control device, and the oil return valve 8 and the filter 13 and the capillary tube 14 described below serve as the oil return functional parts of the oil quantity control device; wherein, the first pipeline 2 is arranged in a ring shape, and the ring shape means that the head and tail ends of the first pipeline 2 are connected to each other but not directly connected to the outside, and its connection with the outside is only through the second pipeline 3 and the third pipeline 4 and the fifth pipeline 11 described below; wherein, the second pipeline 3 and the third pipeline 4 are used to connect to the corresponding external system, and the external system is used to cooperate with the operation of the oil-using device 1.

[0030] Furthermore, as a preferred embodiment, it also includes: a fifth pipeline 11 and an oil drain valve 12, the oil drain valve 12 is arranged on the fifth pipeline 11, one end of the fifth pipeline 11 is connected to the first pipeline 2, and one end of the fifth pipeline 11 is arranged between the oil return valve 8 and the oil storage container 7.

[0031] Further, as a preferred embodiment, the other end of the fifth pipeline 11 can be preferably connected to a container structure to store the discharged oil.

[0032] Furthermore, as a preferred embodiment, it also includes: a filter 13 and a capillary tube 14, the filter 13 and the capillary tube 14 are sequentially arranged on the first pipeline 2, and the filter 13 and the capillary tube 14 are arranged between the oil return valve 8 and the oil using device 1.

[0033] Further, as a preferred embodiment, the oil storage container 7 comprises: a transparent tank body, the lower end of the transparent tank body is set in a conical shape, a scale line 15 is set on the outer wall of the transparent tank body, the upper end of the transparent tank body is connected to the oil separator 6 through the first pipeline 2, and the lower end of the transparent tank body is connected to the oil return valve 8 through the first pipeline 2. Further, through the setting of the transparent tank body and the scale line 15, the oil level and the color of the oil inside can be intuitively shown, which is convenient for the staff to directly judge the operating status of the oil device 1.

[0034] Further, as a preferred embodiment, the portion of the first pipeline 2 connecting the oil storage container 7 and the oil separator 6 is the oil return pipe section of the oil separator 6 .

[0035] Further, as a preferred embodiment, the oil storage container 7 is preferably arranged in a vertical direction, and a portion of refrigeration oil can be pre-stored in the oil storage container 7 before installation and connection, so there is no need to replenish oil during subsequent working operations.

[0036] Furthermore, as a preferred embodiment, the upper portion of the transparent tank body is a cylindrical structure.

[0037] Further, as a preferred embodiment, a first pressure sensor 16 is provided on the oil separator 6, and a second pressure sensor 17 is provided on the first pipeline 2 between the bypass valve 9 and the oil-using device 1. Further, when the oil-using device 1 is a compressor, the second pressure sensor 17 is provided at the exhaust pipe of the compressor, that is, the first pipeline 2 provided with the second pressure sensor 17 is the exhaust pipe of the compressor, that is, the pipe section where the bypass valve 9 is located.

[0038] Further, as a preferred embodiment, the first pressure sensor 16 and the second pressure sensor 17 are preferably both high-pressure pressure sensors.

[0039] Furthermore, as a preferred embodiment, the oil-using device 1 is a compressor.

[0040] like Figure 2 As shown, it is a schematic diagram of the air flow direction during vacuuming. Further, as a preferred embodiment, during the vacuuming and refrigerant charging process of the oil quantity control device: after the oil quantity control device is installed in the above-mentioned external system, when the external system is vacuumed, the bypass valve 9 and the air intake valve 10 are opened to connect the oil quantity control device with the external system, and the oil return valve 8 and the oil drain valve 12 are closed to keep the oil quantity pre-stored in the oil storage container 7 unchanged, and the air intake valve 10 is closed after the refrigerant charging is completed.

[0041] like Figure 3As shown, it is a schematic diagram of the refrigerant flow direction during normal operation. Further, as a preferred embodiment, during the normal operation of the oil quantity control device: during the normal operation of the oil quantity control device, only the bypass valve 9 is opened, the air inlet valve 10, the oil return valve 8 and the oil drain valve 12 are all closed, although the oil separator 6 is connected to the above-mentioned external system through the exhaust port, the refrigerant does not undergo the oil separation process, the oil separator 6 does not work, there is no oil return at the oil return valve 8, and the total oil volume in the external system and the oil-using device 1 remains unchanged.

[0042] like Figure 4 As shown, it is a schematic diagram of the refrigerant flow direction when replenishing oil. Further, as a preferred embodiment, in the process of replenishing oil of the oil quantity control device: when replenishing oil to the compressor, the bypass valve 9 is opened, the intake valve 10 and the oil discharge valve 12 are closed, and the oil return valve 8 is adjusted to control the amount of replenishing oil. At this time, the oil separator 6 does not work but is connected to the external system, and its internal pressure is equal to the exhaust pressure of the compressor. Under the action of the pressure difference at both ends of the oil storage container 7, the oil returns from the oil storage container 7 through the oil return valve 8, the filter 13 and the capillary tube 14 to the compressor intake pipe, and the amount of replenishing oil to the external system is determined by the height of the oil level drop in the oil storage container 7.

[0043] like Figure 5 As shown, it is a schematic diagram of the refrigerant flow direction during recovery. Further, as a preferred embodiment, when there is too much oil in the external system that needs to be recovered, the air inlet valve 10 is opened, the bypass valve 9, the oil return valve 8 and the oil drain valve 12 are closed, so that the refrigerant enters the oil separator 6 and is separated from the oil. The separated oil flows into the oil storage container 7 under the action of gravity, so that the oil amount in the oil storage container 7 increases to the target value. After the oil recovery work is completed, the bypass valve 9 is opened and the air inlet valve 10 is closed. And if there is too much oil stored in the oil storage container 7, the oil drain valve 12 can be opened when the pressure in the oil separator 6 is greater than the atmospheric pressure, and the oil return valve 8 can be closed to discharge the unnecessary oil.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention.

[0045] The utility model also has the following implementation methods based on the above:

[0046] like Figure 6 As shown, a compressor system of a preferred embodiment, i.e., the above-mentioned external system, includes the oil quantity control device of any one of the above-mentioned items, and also includes: a sixth pipeline 18, a gas-liquid separator 19, an expansion valve 20 and a heat exchanger assembly, the two ends of the sixth pipeline 18 are respectively connected to the other end of the second pipeline 3 and the other end of the third pipeline 4, the heat exchanger assembly, the expansion valve 20 and the gas-liquid separator 19 are arranged on the sixth pipeline 18 in sequence, and the gas-liquid separator 19 is arranged close to the second pipeline 3 relative to the heat exchanger assembly.

[0047] In a further embodiment of the utility model, the heat exchanger assembly includes: a condensing heat exchanger 21, a subcooling heat exchanger 22 and an evaporating heat exchanger 23 which are sequentially arranged on the sixth pipeline 18, and the evaporating heat exchanger 23 is arranged close to the gas-liquid separator 19 relative to the condensing heat exchanger 21.

[0048] In a further embodiment of the utility model, it further comprises: a mass flow meter 24 and an oil circulation rate measuring instrument 25, both of which are arranged on the sixth pipeline 18. Further, the mass flow meter 24 is used to measure the mass flow of the refrigerant and oil mixture, and the oil circulation rate measuring instrument 25 is used to measure the proportion of oil in the mixture.

[0049] In a further embodiment of the present invention, a third pressure sensor 26 is disposed on the sixth pipeline 18 , and the third pressure sensor 26 is disposed between the gas-liquid separator 19 and the heat exchanger assembly.

[0050] In a further embodiment of the present invention, the outlet pipe of the gas-liquid separator 19 is the above-mentioned second pipeline 3, that is, the suction pipe of the compressor.

[0051] In a further embodiment of the present invention, the third pressure sensor 26 is preferably a low pressure sensor.

[0052] In a further embodiment of the utility model, during the normal operation of the compressor system, the refrigerant, after being compressed, passes through the bypass valve 9, the condensing heat exchanger 21, the subcooling heat exchanger 22, the mass flow meter 24, the oil circulation rate measuring instrument 25, the expansion valve 20, the evaporating heat exchanger 23, and the gas-liquid separator 19 in sequence and then returns to the compressor; wherein, the subcooling heat exchanger 22 is used to further condense the refrigerant passing through the condensing heat exchanger 21 to be subcooled, thereby ensuring that the refrigerant entering the mass flow meter 24 is in liquid state, thereby ensuring that the measurement of the mass flow meter 24 is accurate.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil quantity control device, characterized in that: include: An oil-using device, a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, an oil separator, an oil storage container, an oil return valve, a bypass valve and an air intake valve; The oil separator, the oil storage container, the oil return valve, the oil using device, and the bypass valve are sequentially arranged on the first pipeline; The first pipeline is connected to the second pipeline and the third pipeline, one end of the second pipeline is arranged between the oil-using device and the oil return valve, and one end of the third pipeline is arranged between the bypass valve and the oil separator; Both ends of the fourth pipeline are connected to the oil separator and the first pipeline respectively, one end of the fourth pipeline connected to the first pipeline is arranged between the bypass valve and the oil using device, and the intake valve is arranged on the fourth pipeline.

2. The oil quantity control device according to claim 1, characterized in that: Also includes: A fifth pipeline and an oil drain valve, wherein the oil drain valve is arranged on the fifth pipeline, one end of the fifth pipeline is connected to the first pipeline, and one end of the fifth pipeline is arranged between the oil return valve and the oil storage container.

3. The oil quantity control device according to claim 1, characterized in that: Also includes: A filter and a capillary tube are sequentially arranged on the first pipeline, and the filter and the capillary tube are arranged between the oil return valve and the oil using device.

4. The oil quantity control device according to claim 1, characterized in that: The oil storage container includes: a transparent tank body, the lower end of which is conical, and scale lines are arranged on the outer wall of the transparent tank body. The upper end of the transparent tank body is connected to the oil separator through the first pipeline, and the lower end of the transparent tank body is connected to the oil return valve through the first pipeline.

5. The oil quantity control device according to claim 1, characterized in that: The oil separator is provided with a first pressure sensor, and the first pipeline between the bypass valve and the oil-using device is provided with a second pressure sensor.

6. The oil quantity control device according to claim 1, characterized in that: The oil-using device is a compressor.

7. A compressor system, comprising the oil quantity control device according to any one of claims 1 to 6, characterized in that: Also includes: A sixth pipeline, a gas-liquid separator, an expansion valve and a heat exchanger assembly, wherein both ends of the sixth pipeline are respectively connected to the other end of the second pipeline and the other end of the third pipeline, the heat exchanger assembly, the expansion valve and the gas-liquid separator are sequentially arranged on the sixth pipeline, and the gas-liquid separator is arranged close to the second pipeline relative to the heat exchanger assembly.

8. The compressor system according to claim 7, characterized in that The heat exchanger assembly includes: a condensing heat exchanger, a subcooling heat exchanger and an evaporating heat exchanger which are sequentially arranged on the sixth pipeline, and the evaporating heat exchanger is arranged close to the gas-liquid separator relative to the condensing heat exchanger.

9. The compressor system according to claim 7, characterized in that Also includes: A mass flow meter and an oil circulation rate measuring instrument, wherein the mass flow meter and the oil circulation rate measuring instrument are both arranged on the sixth pipeline.

10. The compressor system according to claim 7, characterized in that The sixth pipeline is provided with a third pressure sensor, and the third pressure sensor is provided between the gas-liquid separator and the heat exchanger assembly.

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