A compression condensing unit and refrigeration system

Abstract

The embodiment of the utility model provides a kind of compression condensing unit and refrigeration system, it is related to refrigeration technical field.Compression condensing unit includes first compressor unit, second compressor unit, first oil pipe, second oil pipe, first control valve and second control valve, first compressor unit includes first compressor, first oil separator and first oil tank that are sequentially head-to-tail intercommunication, and second compressor unit includes second compressor, second oil separator and second oil tank that are sequentially head-to-tail intercommunication;One end of first oil pipe is connected between first oil separator and first oil tank, and the other end is connected between second oil separator and second oil tank;One end of second oil pipe is connected between first compressor and first oil tank, and the other end is connected between second compressor and second oil tank;First control valve is set in first oil pipe, and second control valve is set in second oil pipe.It can realize multiple oil circuit mode, meet unit operation demand, improve operation reliability and stability.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and more specifically, to a compressor condenser unit and a refrigeration system. Background Technology

[0002] Currently, marine refrigeration systems commonly employ a dual-compressor configuration for their compressor condenser units to improve operational economy and reduce equipment weight. In refrigeration conditions where the cold storage temperature is high and rapid cooling is required, both compressors can operate simultaneously to provide double the cooling capacity for rapid cooling. When the cold storage temperature reaches the set value and only requires temperature stability maintenance, a single-unit operation with dual units serving as backups is adopted.

[0003] For this type of configuration, existing compressor oil circuit systems mainly adopt two design forms: one is the dual-machine shared design, that is, two compressors share one oil storage tank, and the oil circuit pipelines are connected in parallel at the oil storage tank; the other is the independent design, where each compressor is equipped with a dedicated oil storage tank, and the oil circuit system is completely independent.

[0004] However, none of the above-mentioned oil circuit designs can fully meet the actual operating requirements of the unit. During operation, single compressor failures are prone to occur, severely impacting the unit's operational reliability and stability. Utility Model Content

[0005] The purpose of this utility model is to provide a compressor condenser unit and refrigeration system that can meet the unit's operational requirements and improve the unit's operational reliability and stability.

[0006] The embodiments of this utility model are implemented as follows: In a first aspect, this utility model provides a compression condensing unit, comprising: The first compressor unit includes a first compressor, a first oil separator, and a first oil storage tank connected in sequence from end to end. The second compressor unit includes a second compressor, a second oil separator, and a second oil storage tank connected in sequence from end to end. The first oil pipe has one end connected to the pipeline between the first oil separator and the first oil storage tank, and the other end connected to the pipeline between the second oil separator and the second oil storage tank. The second oil pipe has one end connected to the pipeline between the first compressor and the first oil tank, and the other end connected to the pipeline between the second compressor and the second oil tank. A first control valve and a second control valve, wherein the first control valve is disposed on the first oil pipe and the second control valve is disposed on the second oil pipe.

[0007] In an optional embodiment, the compressor-condenser unit further includes a third control valve connected between the first oil separator and the first oil pipe; and / or, The compressor-condenser unit also includes a fourth control valve, which is connected between the second oil separator and the first oil pipe.

[0008] In an optional embodiment, the compressor-condenser unit further includes a fifth control valve connected between the first oil storage tank and the first oil pipe; and / or, The compressor condenser unit also includes a sixth control valve, which is connected between the second oil storage tank and the first oil pipe.

[0009] In an optional embodiment, the first compressor unit further includes a first oil filter, the first oil tank, the first oil filter and the first compressor are connected in sequence, and one end of the second oil pipe is connected to the pipeline between the first oil filter and the first compressor.

[0010] In an optional embodiment, the first compressor unit further includes a first oil balancer, the first oil filter, the first oil balancer and the first compressor are connected in sequence, and one end of the second oil pipe is connected to the pipeline between the first oil filter and the first oil balancer.

[0011] In an optional embodiment, the compressor-condenser unit further includes a seventh control valve connected between the first oil filter and the first oil balancer.

[0012] In an optional embodiment, the second compressor unit further includes a second oil filter, the second oil tank, the second oil filter and the second compressor are connected in sequence, and one end of the second oil pipe is connected to the pipeline between the second oil filter and the second compressor.

[0013] In an optional embodiment, the second compressor unit further includes a second oil balancer, the second oil filter, the second oil balancer and the second compressor are connected in sequence, and one end of the second oil pipe is connected to the pipeline between the second oil filter and the second oil balancer.

[0014] In an optional embodiment, the compressor-condenser unit further includes an eighth control valve connected between the second oil filter and the second oil balancer.

[0015] Secondly, this utility model provides a refrigeration system, including the compression condenser unit described in any of the foregoing embodiments.

[0016] The beneficial effects of this utility model embodiment include: The compressor-condenser unit includes a first compressor unit, a second compressor unit, a first oil pipe, a second oil pipe, a first control valve, and a second control valve. The first compressor unit includes a first compressor, a first oil separator, and a first oil storage tank connected in sequence. The second compressor unit includes a second compressor, a second oil separator, and a second oil storage tank connected in sequence. One end of the first oil pipe is connected to the pipeline between the first oil separator and the first oil storage tank, and the other end is connected to the pipeline between the second oil separator and the second oil storage tank. One end of the second oil pipe is connected to the pipeline between the first compressor and the first oil storage tank, and the other end is connected to the pipeline between the second compressor and the second oil storage tank. The first control valve is located on the first oil pipe, and the second control valve is located on the second oil pipe. The first oil storage tank, the first oil pipe, the second oil storage tank, and the second oil pipe can form a sequentially connected circulating oil circuit. Furthermore, by installing a first control valve on the first oil pipe and a second control valve on the second oil pipe, the control valves on the corresponding oil pipes can be opened or closed according to the actual unit operation conditions. This regulates the flow direction, flow rate, and return rate of the refrigerant oil in the circulating oil circuit, ensuring the normal operation of the compressor and realizing multiple oil circuit modes. This, in turn, meets the unit's operational requirements and improves the unit's operational reliability and stability.

[0017] The refrigeration system includes a compressor-condenser unit, which has all the beneficial effects of such a compressor-condenser unit. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the refrigeration system provided in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the compression condenser unit provided in an embodiment of the present invention.

[0020] Icons: 1000 - Refrigeration System; 100 - Compressor-Condensing Unit; 10 - First Compressor Unit; 11 - First Compressor; 12 - First Oil Separator; 13 - First Oil Tank; 14 - First Oil Filter; 15 - First Oil Balancer; 20 - Second Compressor Unit; 21 - Second Compressor; 22 - Second Oil Separator; 23 - Second Oil Tank; 24 - Second Oil Filter; 25 - Second Oil Balancer; 30 - First Oil Pipe; 40 - Second Oil Pipe; 51 - First Control Valve; 52 - Second Control Valve; 53 - Third Control Valve; 54 - Fourth Control Valve; 55 - Fifth Control Valve; 56 - Sixth Control Valve; 57 - Seventh Control Valve; 58 - Eighth Control Valve; 200 - Cold Storage; 300 - Unit Accessories; 400 - First Refrigeration Pipe; 500 - Second Refrigeration Pipe. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] As described in the background section, existing compressor oil circuit systems mainly adopt two design forms: one is a dual-machine shared design, in which two compressors share one oil storage tank and the oil circuit pipelines are connected in parallel at the oil storage tank; the other is an independent design, in which each compressor is equipped with a dedicated oil storage tank and the oil circuit system is completely independent.

[0028] However, the inventors discovered that if the first parallel oil circuit mode is used, when the two compressors are operating at different pressures (one compressor is at high pressure and the other at low pressure), the refrigerant oil from the high-pressure compressor will be pumped into the low-pressure compressor along the pressure difference, causing a large amount of refrigerant oil to accumulate in the low-pressure compressor chamber. Prolonged operation and subsequent oil depletion will damage that compressor. If the second independent oil circuit mode is used, because the two compressors share the same refrigerant piping, a small amount of refrigerant oil will enter the shared refrigerant piping with the refrigerant in the oil separator, and then return to their respective compressors. This can easily lead to inconsistent oil return efficiency between the two compressors, resulting in different oil levels over time. Ultimately, this can cause one compressor to fail due to oil shortage, thus affecting the reliability and stability of the unit's operation.

[0029] Based on this, please refer to Figure 1 and Figure 2 The present invention provides a compressor-condenser unit 100 and a refrigeration system 1000, which can effectively improve the aforementioned technical problems, that is, it can meet the operational requirements of the unit and improve the operational reliability and stability of the unit. The compressor-condenser unit 100 and the refrigeration system 1000 will be described in detail below.

[0030] Please refer to Figure 1 , Figure 1 This is a structural schematic diagram of the refrigeration system 1000 provided in this embodiment, combined with... Figure 1The refrigeration system 1000 includes a compressor condenser unit 100, a cold storage 200, and unit accessories 300. The unit accessories 300 are installed inside the cold storage 200, and the compressor condenser unit 100 is connected to the unit accessories 300.

[0031] It should be noted that, as will be readily apparent to those skilled in the art, the unit accessory 300 includes components such as an evaporator, a fan, an expansion valve, and sensors, which will not be described in detail in this embodiment.

[0032] For details, please refer to Figure 2 , Figure 2 This is a structural schematic diagram of the compression condenser unit 100 provided in this embodiment, combined with... Figure 2 The compressor-condenser unit 100 includes a first compressor unit 10, a second compressor unit 20, a first oil pipe 30, a second oil pipe 40, a first control valve 51, and a second control valve 52. The first compressor unit 10 includes a first compressor 11, a first oil separator 12, and a first oil storage tank 13 connected in sequence. The second compressor unit 20 includes a second compressor 21, a second oil separator 22, and a second oil storage tank 23 connected in sequence. One end of the first oil pipe 30 is connected to the pipeline between the first oil separator 12 and the first oil storage tank 13, and the other end is connected to the pipeline between the second oil separator 22 and the second oil storage tank 23. One end of the second oil pipe 40 is connected to the pipeline between the first compressor 11 and the first oil storage tank 13, and the other end is connected to the pipeline between the second compressor 21 and the second oil storage tank 23. The first control valve 51 is located on the first oil pipe 30, and the second control valve 52 is located on the second oil pipe 40.

[0033] As is easily understood, the first oil storage tank 13, the first oil pipe 30, the second oil storage tank 23, and the second oil pipe 40 can form a circulating oil circuit that is connected end to end in sequence. Furthermore, by setting a first control valve 51 on the first oil pipe 30 and a second control valve 52 on the second oil pipe 40, the control valves on the corresponding oil pipes can be adjusted to open or close according to the actual unit operation conditions. This regulates the flow direction, flow rate, and return rate of the refrigerant oil in the circulating oil circuit, ensuring the normal operation of the compressor and realizing multiple oil circuit modes. This, in turn, meets the unit's operating requirements and improves the unit's operational reliability and stability.

[0034] It should be noted that the refrigeration oil is discharged from the compressor's exhaust port, enters the oil separator to separate from the refrigerant, and then the separated refrigeration oil is discharged from the oil separator's oil circuit, then enters the oil tank, and then returns to the compressor from the compressor's suction port to complete the cycle.

[0035] Combination Figure 1 and Figure 2The refrigeration system 1000 also includes a first refrigeration pipe 400 and a second refrigeration pipe 500. Both the first refrigeration pipe 400 and the second refrigeration pipe 500 are connected to the unit accessory 300. The first refrigeration pipe 400 has two first refrigeration branches, which are respectively connected to the first oil separator 12 and the second oil separator 22. The second refrigeration pipe 500 has two second refrigeration branches, which are respectively connected to the first compressor 11 and the second compressor 21. Figure 1 As shown in the figure, the dashed line represents the refrigeration piping through which the refrigerant flows.

[0036] Please continue to combine Figure 2 The compressor-condenser unit 100 also includes a third control valve 53, which is connected between the first oil separator 12 and the first oil pipe 30; similarly, the compressor-condenser unit 100 also includes a fourth control valve 54, which is connected between the second oil separator 22 and the first oil pipe 30.

[0037] As is easily understood, the third control valve 53 and the fourth control valve 54 can be understood as being respectively located at the oil outlet of the first oil separator 12 and the second oil separator 22, which can control the opening and closing of the outlet of the corresponding oil separator, and cooperate with the first compressor 11 or the second compressor 21 to realize the shutdown operation of the corresponding compressor and complete the conversion of the single compressor working mode.

[0038] Furthermore, to better control the flow of refrigerant oil to the first storage tank, in this embodiment, the compressor-condenser unit 100 also includes a fifth control valve 55, which is connected between the first oil storage tank 13 and the first oil pipe 30. Similarly, to better control the flow of refrigerant oil to the second storage tank, the compressor-condenser unit 100 also includes a sixth control valve 56, which is connected between the second oil storage tank 23 and the first oil pipe 30.

[0039] Please continue to combine Figure 2 In order to filter the refrigerant oil flowing out of the first oil storage tank 13, protect the first compressor 11, improve its service life, and ensure operational reliability, in this embodiment, the first compressor unit 10 also includes a first oil filter 14. The first oil storage tank 13, the first oil filter 14, and the first compressor 11 are connected in sequence, and one end of the second oil pipe 40 is connected to the pipeline between the first oil filter 14 and the first compressor 11.

[0040] Similarly, in order to filter the refrigeration oil flowing out of the second oil tank 23, the second compressor unit 20 also includes a second oil filter 24. The second oil tank 23, the second oil filter 24 and the second compressor 21 are connected in sequence, and one end of the second oil pipe 40 is connected to the pipeline between the second oil filter 24 and the second compressor 21.

[0041] Furthermore, the first compressor unit 10 also includes a first oil balancer 15, a first oil filter 14, the first oil balancer 15, and the first compressor 11 connected in sequence, with one end of the second oil pipe 40 connected to the pipeline between the first oil filter 14 and the first oil balancer 15. By setting the first oil balancer 15, the return oil can be evenly distributed, ensuring consistent oil levels in the compressor, further improving the stability of the unit during operation, and preventing damage to the compressor.

[0042] Similarly, the second compressor unit 20 also includes a second oil balancer 25, a second oil filter 24, a second oil balancer 25 and a second compressor 21 connected in sequence, and one end of the second oil pipe 40 is connected to the pipeline between the second oil filter 24 and the second oil balancer 25.

[0043] To better control the oil flow from the oil filter to the oil balancer, in this embodiment, the compressor-condenser unit 100 further includes a seventh control valve 57, which is connected between the first oil filter 14 and the first oil balancer 15. Similarly, the compressor-condenser unit 100 also includes an eighth control valve 58, which is connected between the second oil filter 24 and the second oil balancer 25.

[0044] According to the above description, by setting the coordination between the first control valve 51, the second control valve 52, the third control valve 53, the fourth control valve 54, the fifth control valve 55, the sixth control valve 56, the seventh control valve 57 and the eighth control valve 58, the opening or closing of the corresponding oil circuits can be controlled, thereby flexibly switching between different oil circuit modes to meet the different operating needs of the compressor as much as possible.

[0045] Specifically, the compression condenser unit 100 provided in this embodiment has eight different oil circuit modes: The first mode is the independent oil circuit mode: Control valves 53, 54, 55, 56, 57, and 58 are open, while control valves 51 and 52 are closed. In this mode, the oil circuits of the first compressor 11 and the second compressor 21 are completely independent and isolated, with the refrigerant oil circulating in their respective compressor oil circuits. This mode is suitable for all compressor operating conditions, such as when both compressors are running simultaneously, or when one compressor is stopped and the other is running.

[0046] The second mode involves sharing the first oil storage tank 13: First control valve 51, second control valve 52, third control valve 53, fourth control valve 54, fifth control valve 55, seventh control valve 57, and eighth control valve 58 are open, while sixth control valve 56 is closed. In this mode, the oil circuits of the first compressor 11 and the second compressor 21 are connected in parallel at the first oil storage tank 13. The refrigerant oil from both compressors enters the first oil storage tank 13 together and then returns to their respective compressors. This mode is suitable for situations where both compressors operate and stop simultaneously.

[0047] The third mode involves sharing the second oil storage tank 23: Control valves 51, 52, 53, 54, 56, 57, and 58 are open, while control valve 55 is closed. In this mode, the oil circuits of the first compressor 11 and the second compressor 21 are connected in parallel at the second oil storage tank 23. The refrigerant oil from both compressors enters the second oil storage tank 23 and then returns to their respective compressors. This mode is also suitable for situations where both compressors operate and stop simultaneously.

[0048] The fourth mode is the parallel oil circuit mode: When the first control valve 51, second control valve 52, third control valve 53, fourth control valve 54, fifth control valve 55, sixth control valve 56, seventh control valve 57, and eighth control valve 58 are all open, the first oil storage tank 13 and the second oil storage tank 23 are also connected in parallel, which can be viewed as a single large oil storage tank. The compressor refrigerant oil enters both the first oil storage tank 13 and the second oil storage tank 23, and then returns to their respective first compressor 11 and second compressor 21. This mode is also suitable for situations where two compressors operate and stop simultaneously. Furthermore, unlike the second and third modes, in this mode, because the first oil storage tank 13 and the second oil storage tank 23 are connected end-to-end, the oil levels in the first oil storage tank 13 and the second oil storage tank 23 can self-balance when the first compressor 11 and the second compressor 21 operate or stop simultaneously. This protects the compressors and improves the overall operational stability and reliability of the unit.

[0049] Fifthly, the first compressor 11 uses the second oil tank 23 mode: the first control valve 51, the second control valve 52, the third control valve 53, the sixth control valve 56 and the seventh control valve 57 are open, and the fourth control valve 54, the fifth control valve 55 and the eighth control valve 58 are closed; in this way, when only the first compressor 11 is running and the second compressor 21 is stopped, if the first oil tank 13 fails, the first compressor 11 can bypass the first oil tank 13 and use the second oil tank 23, which can still ensure the smooth circulation of oil in the first compressor 11 and achieve stable operation of the unit.

[0050] The sixth mode is that the second compressor 21 uses the first oil tank 13: the first control valve 51, the second control valve 52, the fourth control valve 54, the fifth control valve 55 and the eighth control valve 58 are open, and the third control valve 53, the sixth control valve 56 and the seventh control valve 57 are closed. In this way, when only the second compressor 21 is running and the first compressor 11 is stopped, if the second oil tank 23 fails, the second compressor 21 can bypass the second oil tank 23 and use the first oil tank 13, which can still ensure the smooth circulation of oil in the second compressor 21 and achieve stable operation of the unit.

[0051] The seventh mode is when the first compressor 11 uses the first oil tank 13 and the second oil tank 23: the first control valve 51, the second control valve 52, the third control valve 53, the fifth control valve 55, the sixth control valve 56 and the seventh control valve 57 are open, and the fourth control valve 54 and the eighth control valve 58 are closed; in this way, when only the first compressor 11 is running and the second compressor 21 is stopped, the first compressor 11 can use the first oil tank 13 and the second oil tank 23, and the oil level in the oil tank can be self-balanced.

[0052] The eighth mode is when the second compressor 21 uses the first oil tank 13 and the second oil tank 23: the first control valve 51, the second control valve 52, the fourth control valve 54, the fifth control valve 55, the sixth control valve 56 and the eighth control valve 58 are open, and the third control valve 53 and the seventh control valve 57 are closed; in this way, when only the second compressor 21 is running and the first compressor 11 is stopped, the second compressor 21 can use the first oil tank 13 and the second oil tank 23, and the oil level in the oil tanks can be self-balanced.

[0053] In summary, according to the compressor-condenser unit 100 provided in this embodiment, when both compressors are in operation simultaneously or in a single-operation, single-shutdown mode, the first mode allows the unit to operate safely for a longer period. After prolonged operation, if the oil levels in the two independent oil circuit systems deviate, self-balancing of the oil level can be achieved through any of the fourth, seventh, and eighth modes. In the second or third mode, one oil tank is used while the other is on standby, improving the reliability of the oil circuit system for simultaneous operation of two compressors. The fifth and sixth modes operate only when the first compressor 11 or the second compressor 21 is running, improving system reliability and avoiding the risk of oil circuit circulation failure when either the first oil tank 13 or the second compressor 21 fails, or the second oil tank 23 or the first compressor 11 fails.

[0054] Furthermore, in this embodiment, the first control valve 51, the second control valve 52, the third control valve 53, the fourth control valve 54, the fifth control valve 55, the sixth control valve 56, the seventh control valve 57, and the eighth control valve 58 are all electrically controlled valves. The valves can be linked to the compressor's operating status and oil level status, enabling fully automatic control under different compressor operating conditions and different oil levels. This ensures that the optimal oil circuit mode is always maintained, improving the unit's operational stability and reliability.

[0055] The refrigeration system 1000 includes a compressor-condenser unit 100, which has all the functions and benefits of the compressor-condenser unit 100.

[0056] The above description is merely a specific embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A compression condensing unit, characterized in that, include: The first compressor unit (10) includes a first compressor (11), a first oil separator (12) and a first oil storage tank (13) connected in sequence. The second compressor unit (20) includes a second compressor (21), a second oil separator (22) and a second oil storage tank (23) connected in sequence. The first oil pipe (30) has one end connected to the pipeline between the first oil separator (12) and the first oil storage tank (13), and the other end connected to the pipeline between the second oil separator (22) and the second oil storage tank (23); The second oil pipe (40) has one end connected to the pipeline between the first compressor (11) and the first oil storage tank (13), and the other end connected to the pipeline between the second compressor (21) and the second oil storage tank (23); A first control valve (51) and a second control valve (52) are provided, wherein the first control valve (51) is provided in the first oil pipe (30) and the second control valve (52) is provided in the second oil pipe (40).

2. The compression condensing unit according to claim 1, characterized in that, The compressor-condenser unit (100) further includes a third control valve (53), which is connected between the first oil separator (12) and the first oil pipe (30); and / or, The compressor condenser unit (100) also includes a fourth control valve (54), which is connected between the second oil separator (22) and the first oil pipe (30).

3. The compression condensing unit according to claim 1, characterized in that, The compressor-condenser unit (100) further includes a fifth control valve (55), which is connected between the first oil storage tank (13) and the first oil pipe (30); and / or, The compressor condenser unit (100) also includes a sixth control valve (56), which is connected between the second oil storage tank (23) and the first oil pipe (30).

4. The compression condensing unit according to claim 1, characterized in that, The first compressor unit (10) also includes a first oil filter (14), the first oil tank (13), the first oil filter (14) and the first compressor (11) are connected in sequence, and one end of the second oil pipe (40) is connected to the pipeline between the first oil filter (14) and the first compressor (11).

5. The compression condensing unit according to claim 4, characterized in that, The first compressor unit (10) also includes a first oil balancer (15), the first oil filter (14), the first oil balancer (15) and the first compressor (11) are connected in sequence, and one end of the second oil pipe (40) is connected to the pipeline between the first oil filter (14) and the first oil balancer (15).

6. The compression condensing unit according to claim 5, characterized in that, The compressor condenser unit (100) also includes a seventh control valve (57), which is connected between the first oil filter (14) and the first oil balancer (15).

7. The compression condensing unit according to claim 1, characterized in that, The second compressor unit (20) also includes a second oil filter (24), the second oil tank (23), the second oil filter (24) and the second compressor (21) are connected in sequence, and one end of the second oil pipe (40) is connected to the pipeline between the second oil filter (24) and the second compressor (21).

8. The compression condensing unit according to claim 7, characterized in that, The second compressor unit (20) also includes a second oil balancer (25), the second oil filter (24), the second oil balancer (25) and the second compressor (21) are connected in sequence, and one end of the second oil pipe (40) is connected to the pipeline between the second oil filter (24) and the second oil balancer (25).

9. The compression condensing unit according to claim 8, characterized in that, The compressor condenser unit (100) also includes an eighth control valve (58), which is connected between the second oil filter (24) and the second oil balancer (25).

10. A refrigeration system, characterized in that, Includes the compression condenser unit (100) as described in any one of claims 1-9.

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