Refrigerant compression device, temperature control system and test sorting equipment
By optimizing the design of the oil storage tank and pipeline in the refrigerant compression unit, and combining it with the control valve to control the oil flow, the problems of slow oil collection speed and oil slugging in the oil separator in traditional units have been solved, thus achieving stable oil quantity in the compressor, avoiding damage, and ensuring stable operation of the unit.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU CHANGCHUAN TECH CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-28
AI Technical Summary
In traditional refrigerant compression units, the oil separator collects oil slowly when the compressor oil is changed, resulting in a reduction in oil volume, which may damage the compressor. In addition, the large pressure difference when the oil in the oil tank enters the compressor can cause oil slugging and damage the compressor.
A refrigerant compression device is designed, including an oil tank, first and second pipelines, and the positions and heights of the oil drain port and oil fill port are designed. Combined with the control valve to control the oil flow, the oil is ensured to flow in and out slowly, avoiding too little or too much oil in the compressor. The oil outlet of the oil separator is controlled by a float switch to achieve stable operation.
When changing the oil, ensure a stable oil level in the compressor to avoid damage to the compressor, ensure stable operation of the unit, simplify the structure, and reduce downtime.
Smart Images
Figure CN224175359U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing and sorting equipment technology, and in particular to a refrigerant compression device, a temperature control system, and testing and sorting equipment. Background Technology
[0002] The testing and sorting equipment has a temperature control system, which includes a compressor, condenser, throttling mechanism, and load evaporator. The refrigerant circulates within the compressor, condenser, throttling mechanism, and load evaporator. The load evaporator exchanges heat with the electronic components, controlling their temperature to test their stability and reliability under high and low temperature environments.
[0003] Because electronic components are manufactured at a wide temperature range, reaching up to 200℃, the lifespan of compressor oil is significantly affected when operating at high temperatures. Generally, compressor oil deteriorates after a period of time in high-temperature environments and needs to be removed and replaced. In traditional technology, the oil separator's return port has an oil collection tank, and the compressor's suction end has an oil storage tank. When changing the oil, the old oil is separated by the oil separator and stored in the oil collection tank. Once the oil collection tank is full, the new oil from the storage tank is added to the compressor. Because the oil separation speed is slow, it takes a long time for the oil collection tank to fill. During this process, the amount of oil in the compressor continuously decreases, potentially causing insufficient oil and damaging the compressor. Furthermore, when oil from the storage tank enters the compressor, due to the large pressure difference, a large amount of oil enters the compressor cavity in a short time, causing oil slugging and damaging the compressor. Utility Model Content
[0004] Therefore, it is necessary to provide a refrigerant compression device, a temperature control system, and a testing and sorting device that can improve the above-mentioned problems.
[0005] A refrigerant compression device, comprising:
[0006] The first compressor has an exhaust end and an oil return port;
[0007] An oil separator having an inlet and an oil outlet, the inlet being connected to the exhaust end;
[0008] The oil storage tank, the first pipeline, and the second pipeline are provided. The oil storage tank has a first port and a second port. The second port is positioned higher than the first port. The two ends of the first pipeline are connected to the oil outlet and the first port, respectively. The two ends of the second pipeline are connected to the second port and the oil return port, respectively.
[0009] The oil storage tank and / or the first pipeline are provided with an oil drain port for draining oil from the oil storage tank. The height of the oil drain port is not higher than the first port. At least one of the oil storage tank, the first pipeline and the second pipeline is provided with an oil filling port for injecting oil into the oil storage tank.
[0010] In one embodiment, the first opening is located on the bottom end face of the oil storage tank;
[0011] and / or
[0012] The second opening is located on the top end face of the oil storage tank.
[0013] In one embodiment, the oil drain port and the oil filling port are both located on the bottom end face of the oil storage tank and are integrated into one unit.
[0014] In one embodiment, the refrigerant compression device further includes a control valve for controlling the opening and closing of the drain port and the fill port.
[0015] In one embodiment, the refrigerant compression device further includes a first oil valve, which is disposed on the second pipeline and is used to control the on / off state of the second pipeline;
[0016] The refrigerant compression device further includes a connecting pipeline and a second oil valve. The connecting pipeline connects the first pipeline and the oil return port, and the second oil valve is located on the connecting pipeline to control the opening and closing of the connecting pipeline.
[0017] In one embodiment, the connecting pipeline is connected to the return port through the second pipeline, and the connecting pipeline and the second pipeline have an intersection point, which is located between the first oil valve and the return port.
[0018] A temperature control system includes a first condenser, a first throttling element, a load evaporator, and a refrigerant compression device as described above;
[0019] The first compressor, the first condenser, the first throttling element, and the load evaporator are sequentially connected to form a first closed loop. The oil separator is disposed on the first closed loop and located between the first compressor and the first condenser. The exhaust port of the oil separator is connected to the input end of the first condenser.
[0020] In one embodiment, the temperature control system further includes a heat exchange module, which exchanges heat with the first closed loop through the first condenser.
[0021] In one embodiment, the heat exchange module includes a second compressor, a second condenser, and a second throttling device. The second compressor, the second condenser, the second throttling device, and the first condenser are sequentially connected to form a second closed loop, and the first condenser forms an evaporative condenser.
[0022] The first closed loop and the second closed loop are thermally coupled through the evaporator-condenser.
[0023] A testing and sorting device, comprising the temperature control system described above.
[0024] The aforementioned refrigerant compression unit, temperature control system, and testing and sorting equipment ensure that when the oil in the first compressor deteriorates, new oil is injected into the first compressor during the flow of oil between the first compressor, oil separator, and oil tank. At this time, the rate at which oil flows out of the first compressor is approximately equal to the rate at which it enters, and the oil flows into the first compressor at a relatively slow speed. This prevents a large amount of oil from entering the first compressor in a short period, thus reducing the risk of damage due to excessive pressure differential and ensuring the stable operation of the refrigerant compression unit. Simultaneously, the rate at which oil flows out of the first compressor and returns from the oil separator outlet is very slow. When it is necessary to replace the oil in the oil tank, the deteriorated oil in the tank has sufficient time to drain from the drain port and sufficient time to be refilled from the fill port. Once the oil is replenished in the oil tank, it can then circulate back into the first compressor, preventing damage due to insufficient oil levels. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of a temperature control system provided in one embodiment of this application;
[0026] Figure 2 A schematic diagram of a temperature control system provided in another embodiment of this application.
[0027] 100. Temperature control system; 10. Refrigerant compression unit; 11. First compressor; 111. Discharge end; 112. Oil return port; 12. Oil separator; 121. Inlet; 122. Oil outlet; 123. Discharge port; 13. Oil storage tank; 131. First port; 132. Second port; 133. Oil drain port; 134. Oil filling port; 14. First pipeline; 15. Second pipeline; 16. First oil valve; 17. Connecting pipeline; 18. Second oil valve; 20. First condenser; 30. First throttling element; 40. Load evaporator; 50. Second compressor; 60. Second condenser; 70. Second throttling element; A. First closed loop; B. Second closed loop; C. Junction point. Detailed Implementation
[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0034] See Figure 1 One embodiment of this application provides a refrigerant compression device 10, including a first compressor 11 and an oil separator 12. The first compressor 11 has a discharge end 111 and an oil return port 112. The discharge end 111 is used to discharge high-temperature refrigerant gas, and the oil return port 112 is used for oil return from the first compressor 11. The oil separator 12 has an inlet 121 and an oil outlet 122. The inlet 121 is connected to the discharge end 111, and the refrigerant discharged from the discharge end 111 can enter the oil separator 12 through the inlet 121. The oil separator 12 is used to separate the refrigerant and oil (compressor oil), and the separated oil flows out of the oil separator 12 through the oil outlet 122.
[0035] Furthermore, the refrigerant compression device 10 also includes an oil storage tank 13, a first pipeline 14, and a second pipeline 15. The oil storage tank 13 has a first port 131 and a second port 132, with the second port 132 positioned higher than the first port 131. The two ends of the first pipeline 14 are connected to the oil outlet 122 and the first port 131, respectively, and the two ends of the second pipeline 15 are connected to the second port 132 and the oil return port 112, respectively. The height of the drain port 133 is not higher than the first port 131. The oil storage tank 13 and / or the first pipeline 14 are provided with drain ports 133 for draining oil from the oil storage tank 13, and at least one of the oil storage tank 13, the first pipeline 14, and the second pipeline 15 is provided with an oil inlet 134 for filling oil into the oil storage tank 13.
[0036] During normal operation of the refrigerant compression unit 10, the refrigerant discharged from the exhaust end 111 of the first compressor 11 enters the oil separator 12 through the inlet 121. The oil separator 12 separates the refrigerant and oil, and the separated oil enters the first pipeline 14 through the oil outlet 122. The oil in the first pipeline 14 enters the oil storage tank 13 through the first port 131, and the oil in the oil storage tank 13 flows out through the second port 132 and enters the first compressor 11 through the second pipeline 15. It can be seen that during normal operation of the refrigerant compression unit 10, the oil circulates between the first compressor 11, the oil separator 12, and the oil storage tank 13. Therefore, even if the oil in the first compressor 11 has not deteriorated, the oil in the oil storage tank 13 will still flow into the first compressor 11.
[0037] When the oil in the first compressor 11 deteriorates, since the second port 132 is higher than the first port 131, the deteriorated oil flows from the lower first port 131 to the oil storage tank 13, while the oil flowing from the higher second port 132 into the first compressor 11 is all new oil that has not deteriorated, thus preventing the deteriorated oil from flowing back into the first compressor 11.
[0038] When oil deterioration is detected in the oil storage tank 13, the drain port 133 needs to be opened to replace the oil in the oil storage tank 13. Since the opening and closing of the oil outlet 122 of the oil separator 12 is controlled by a float switch inside the oil separator 12, when the drain port 133 is opened, the float in the oil separator 12 will quickly close the oil outlet 122, preventing refrigerant from leaking out of the system from the oil outlet 122. Furthermore, since the height of the drain port 133 is lower than or equal to the height of the first outlet 131, the oil in the oil storage tank 13 will not flow back into the oil separator 12 from the first outlet 131; the deteriorated oil will flow out from the drain port 133.
[0039] Since the oil storage tank 13 is connected to the oil return port 112 of the first compressor 11 via the second port 132, the pressure in the oil storage tank 13 is comparable to the pressure at the oil return port 112 of the first compressor 11. When oil is discharged from the oil storage tank 13, its pressure is much higher than atmospheric pressure, and the oil discharge speed from the discharge port 133 is very fast. The oil flowing out of the first compressor 11 and returning from the oil outlet 122 of the oil separator 12 is very slow, allowing sufficient time for oil discharge and subsequent oil filling operations, without affecting the stable operation of the refrigerant compression unit 10. By controlling the volume of the discharged oil (the discharge volume is generally smaller than the volume of the oil storage tank 13), it is ensured that the deteriorated oil in the oil storage tank 13 is discharged without releasing refrigerant.
[0040] After all the oil in the oil storage tank 13 has been drained, fresh oil is injected into the oil storage tank 13 through the oil inlet 134, with the volume of oil injected being the same as the volume of oil drained. After the oil storage tank 13 has been filled, the oil inlet 134 is closed, and the oil in the oil storage tank 13 re-enters the circulation to be slowly injected into the first compressor 11.
[0041] The refrigerant compression device 10 provided in this application embodiment, when the oil in the first compressor 11 deteriorates, injects new oil into the first compressor 11 during the process of the oil flowing between the first compressor 11, the oil separator 12, and the oil storage tank 13. At this time, the speed at which the oil flows out of the first compressor 11 is equivalent to the speed at which the oil enters the first compressor 11, and the oil flows into the first compressor 11 at a relatively slow speed. In a short period of time, a large amount of oil will not enter the interior of the first compressor 11, which is not likely to cause the first compressor 11 to be damaged due to excessive pressure difference, thus ensuring the stable operation of the refrigerant compression device 10. Meanwhile, the oil flows out of the first compressor 11 and returns from the oil outlet 122 of the oil separator 12 at a very slow speed. When it is necessary to replace the oil in the oil storage tank 13, the deteriorated oil in the oil storage tank 13 has sufficient time to be discharged from the drain port 133 and sufficient time to be filled into the oil storage tank 13 from the filling port 134. After the oil is filled into the oil storage tank 13, it can be circulated back to the first compressor 11, so that the first compressor 11 will not be damaged due to insufficient oil.
[0042] It should also be noted that in this application, the oil change operation of the first compressor 11 can be achieved by setting up an oil storage tank 13, which simplifies the structural configuration of the refrigerant compressor 10 compared to the prior art which uses both an oil collection tank and an oil storage tank. Furthermore, whether the refrigerant compressor 10 is operating normally or during the oil change process between the first compressor 11 and the oil storage tank 13, the volume of oil in the oil storage tank 13 remains essentially constant. The amount of oil in the first compressor 11 remains essentially constant throughout the entire oil change process, preventing damage to the first compressor 11 due to excessive or insufficient oil.
[0043] In some embodiments, see further reference. Figure 1 The first port 131 is located on the bottom end face of the oil storage tank 13. The second port 132 is located on the top end face of the oil storage tank 13. In this way, all the new oil in the oil storage tank 13 can circulate to the first compressor 11, and oil stagnation will not occur.
[0044] It is conceivable that in some other embodiments, the first port 131 is located on the bottom end face of the oil storage tank 13, while the second port 132 is not located on the top end face of the oil storage tank 13. Alternatively, the first port 131 is not located on the bottom end face of the oil storage tank 13, while the second port 132 is located on the top end face of the oil storage tank 13. In still other embodiments, the first port 131 is not located on the bottom end face of the oil storage tank 13, and the second port 132 is not located on the top end face of the oil storage tank 13; this is not limited here.
[0045] In some embodiments, the drain port 133 and the filling port 134 are both located on the bottom end face of the oil storage tank 13 and are integrated into one unit, which simplifies the structure and facilitates the discharge of all the oil from the oil storage tank 13.
[0046] It should be noted that when both the oil drain port 133 and the oil filling port 134 are located on the bottom end face of the oil storage tank 13, the oil drain port 133, the oil filling port 134 and the first port 131 can also be integrated into one unit to further simplify the structural design.
[0047] Optionally, the refrigerant compression device 10 also includes a control valve (not shown in the figure), which is used to control the opening and closing of the oil drain port 133 and the oil filler port 134. Specifically, when the oil drain port 133 and the oil filler port 134 are integrated into one unit, the refrigerant compression device 10 can control the opening and closing of both through a single control valve. However, when the oil drain port 133 and the oil filler port 134 are relatively independent, the refrigerant compression device 10 is provided with two independent control valves to control the opening and closing of the oil drain port 133 and the oil filler port 134 respectively.
[0048] In some embodiments, see Figure 2 The refrigerant compression device 10 also includes a first oil valve 16, which is disposed on the second pipeline 15 and is used to control the on / off state of the second pipeline 15. The refrigerant compression device 10 also includes a connecting pipeline 17 and a second oil valve 18. The connecting pipeline 17 connects the first pipeline 14 and the oil return port 112, and the second oil valve 18 is disposed on the connecting pipeline 17 and is used to control the on / off state of the connecting pipeline 17.
[0049] When the oil in the first compressor 11 is not deteriorated and does not need to be changed, the first oil valve 16 is closed and the second oil valve 18 is opened. At this time, the oil flowing out of the oil outlet 122 of the oil separator 12 flows to the oil return port 112 of the first compressor 11 through the connecting pipe 17. The oil only circulates between the first compressor 11 and the oil separator 12. The oil in the oil storage tank 13 does not participate in the circulation, reducing the oil circulation path.
[0050] When oil deterioration is detected in the first compressor 11 (there are many ways to determine whether the oil in the first compressor 11 has deteriorated, such as judging by the high-temperature operation time of the refrigerant compressor 10 or by detecting it from the refrigerant charging port, etc., this application does not limit this), the first oil valve 16 is opened and the second oil valve 18 is closed. Since the oil outlet 122 of the oil separator 12 is connected to the first port 131 of the oil storage tank 13 through the first pipeline 14, the pressure at the oil storage tank 13 and the oil outlet 122 is equal. When the first oil valve 16 is switched from the closed state to the open state and the second oil valve 18 is switched from the open state to the closed state, the pressure inside the refrigerant compressor 10 is stable, and the refrigerant compressor 10 does not need to be stopped to switch the valve states.
[0051] When the first oil valve 16 is opened and the second oil valve 18 is closed, the gas discharged from the exhaust end 111 of the first compressor 11 enters the oil separator 12 through the inlet 121. The oil separator 12 separates the refrigerant and oil, and the separated oil enters the first pipeline 14 through the oil outlet 122. The oil in the first pipeline 14 enters the oil storage tank 13 through the first port 131, and the oil in the oil storage tank 13 enters the first compressor 11 through the second port 132 to replace the deteriorated oil in the first compressor 11.
[0052] When oil deterioration is detected in oil tank 13, the drain port 133 needs to be opened to replace the oil in oil tank 13. The opening and closing of the oil outlet 122 of oil separator 12 is controlled by a float switch inside oil separator 12. When the drain port 133 is opened, the float in oil separator 12 will quickly close the oil outlet 122, preventing refrigerant from leaking out of the system from the oil outlet 122. Since oil tank 13 is connected to the oil return port 112 of the first compressor 11 through the second port 132, the pressure inside oil tank 13 is much higher than atmospheric pressure when oil is drained. The oil draining speed from drain port 133 is very fast, while the oil flowing out of the first compressor 11 and returning from oil separator 12 is very slow. This provides ample time for oil draining and subsequent oil filling operations, without affecting the stable operation of the refrigerant compression unit 10. By controlling the volume of drained oil, it is ensured that the deteriorated oil in oil tank 13 is drained without releasing refrigerant.
[0053] After all the oil in the oil storage tank 13 has been drained, fresh oil is injected into the oil storage tank 13 through the oil inlet 134, with the volume of oil injected being the same as the volume of oil drained. Once the oil storage tank 13 has been filled, the first oil valve 16 is closed and the second oil valve 18 is opened, awaiting the next oil change. Oil flowing from the oil outlet 122 of the oil separator 12 flows through the connecting pipe 17 to the return oil port 112 of the first compressor 11. The oil circulates only between the first compressor 11 and the oil separator 12; the oil in the oil storage tank 13 does not participate in the circulation.
[0054] Furthermore, the connecting pipe 17 is connected to the return oil port 112 via the second pipe 15, and the connecting pipe 17 and the second pipe 15 have an intersection point C, which is located between the first oil valve 16 and the return oil port 112. This facilitates the connection between the various structures and the control of the on / off state of the second pipe 15 and the connecting pipe 17.
[0055] Continue reading Figure 1 and Figure 2Another embodiment of this application provides a temperature control system 100, which includes a first condenser 20, a first throttling element 30, a load evaporator 40, and the aforementioned refrigerant compression device 10. The first compressor 11, the first condenser 20, the first throttling element 30, and the load evaporator 40 are sequentially connected to form a first closed loop A. An oil separator 12 is disposed on the first closed loop A and located between the first compressor 11 and the first condenser 20. The exhaust port 123 of the oil separator 12 is connected to the input end of the first condenser 20. When the first closed loop A is working, the refrigerant circulates among the first compressor 11, the first condenser 20, the first throttling element 30, and the load evaporator 40. When the refrigerant flows through the load evaporator 40, it can exchange heat with electronic components to control the temperature of the electronic components.
[0056] Since the refrigerant compression device 10 described above has beneficial effects, the temperature control system 100, which includes the refrigerant compression device 10, has the same beneficial effects, and will not be described in detail here.
[0057] Furthermore, the temperature control system 100 also includes a heat exchange module, which exchanges heat with the first closed loop A through the first condenser 20, and the heat exchange module can be used to cool down the first condenser 20.
[0058] Optionally, the heat exchange module includes a second compressor 50, a second condenser 60, and a second throttling element 70. The second compressor 50, the second condenser 60, the second throttling element 70, and the first condenser 20 are sequentially connected to form a second closed loop B, and the first condenser 20 forms an evaporator-condenser. The first closed loop A and the second closed loop B are thermally coupled through the evaporator-condenser.
[0059] Specifically, when the second closed loop B is operating, the refrigerant circulates between the second compressor 50, the second condenser 60, the second throttling element 70, and the first condenser 20. When the refrigerant flows through the first condenser 20, it can exchange heat with the refrigerant in the first closed loop A, thereby reducing the refrigerant level in the first closed loop A. At this time, the second closed loop B is a high-temperature stage loop, the first closed loop A is a low-temperature stage loop, and the temperature control system 100 is a two-stage cascade refrigeration system.
[0060] It is conceivable that in other embodiments, the heat exchange module can be set in other ways, as long as it can cool the first condenser 20, and no limitation is made here.
[0061] Another embodiment of this application provides a testing and sorting device, including the temperature control system 100 described above. Since the temperature control system 100 has beneficial effects, the testing and sorting device including the temperature control system 100 has the same beneficial effects, which will not be described in detail here.
[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A refrigerant compression device, characterized in that, include: The first compressor (11) has an exhaust end (111) and an oil return port (112); An oil separator (12) has an inlet (121) and an oil outlet (122), the inlet (121) being connected to the exhaust end (111); The oil storage tank (13), the first pipeline (14), and the second pipeline (15) are provided. The oil storage tank (13) has a first port (131) and a second port (132). The second port (132) is positioned higher than the first port (131). The two ends of the first pipeline (14) are connected to the oil outlet (122) and the first port (131) respectively. The two ends of the second pipeline (15) are connected to the second port (132) and the oil return port (112) respectively. The oil storage tank (13) and / or the first pipeline (14) are provided with an oil drain port (133) for draining oil from the oil storage tank (13), the height of the oil drain port (133) is not higher than the first port (131), and at least one of the oil storage tank (13), the first pipeline (14) and the second pipeline (15) is provided with an oil filling port (134) for filling oil into the oil storage tank (13).
2. The refrigerant compression device according to claim 1, characterized in that, The first opening (131) is located on the bottom end face of the oil storage tank (13); and / or The second opening (132) is located on the top end face of the oil storage tank (13).
3. The refrigerant compression device according to claim 1, characterized in that, The oil drain port (133) and the oil filling port (134) are both located on the bottom end face of the oil storage tank (13) and are integrated into one unit.
4. The refrigerant compression device according to claim 1, characterized in that, The refrigerant compression device also includes a control valve, which is used to control the opening and closing of the oil drain port (133) and the oil filler port (134).
5. The refrigerant compression device according to any one of claims 1-4, characterized in that, The refrigerant compression device further includes a first oil valve (16), which is located on the second pipeline (15) and is used to control the opening and closing of the second pipeline (15); The refrigerant compression device further includes a connecting pipe (17) and a second oil valve (18). The connecting pipe (17) connects the first pipe (14) and the oil return port (112). The second oil valve (18) is located on the connecting pipe (17) and is used to control the opening and closing of the connecting pipe (17).
6. The refrigerant compression device according to claim 5, characterized in that, The connecting pipe (17) is connected to the return port (112) through the second pipe (15), and the connecting pipe (17) and the second pipe (15) have an intersection point (C), which is located between the first oil valve (16) and the return port (112).
7. A temperature control system, characterized in that, It includes a first condenser (20), a first throttling element (30), a load evaporator (40), and a refrigerant compression device as described in any one of claims 1-6; The first compressor (11), the first condenser (20), the first throttling device (30) and the load evaporator (40) are connected in sequence to form a first closed loop A. The oil separator (12) is provided on the first closed loop A and located between the first compressor (11) and the first condenser (20). The exhaust port (123) of the oil separator (12) is connected to the input end of the first condenser (20).
8. The temperature control system according to claim 7, characterized in that, The temperature control system also includes a heat exchange module, which exchanges heat with the first closed loop A through the first condenser (20).
9. The temperature control system according to claim 8, characterized in that, The heat exchange module includes a second compressor (50), a second condenser (60) and a second throttling device (70). The second compressor (50), the second condenser (60), the second throttling device (70) and the first condenser (20) are connected in sequence to form a second closed loop B. The first condenser (20) forms an evaporator-condenser. The first closed loop A and the second closed loop B are thermally coupled through the evaporator-condenser.
10. A testing and sorting device, characterized in that, Including the temperature control system as described in any one of claims 7-9.