Device for preventing fluorine pump system from breaking head pressure

Abstract

The utility model relates to air conditioning technical field, concretely relates to a device for preventing fluorine pump system lift break, including compressor, condenser, liquid storage tank, refrigerant pump, expansion valve, evaporator, first switch valve and second switch valve, one end of compressor communicates with one end of condenser, the other end of condenser communicates with liquid storage tank, one end of liquid storage tank communicates with refrigerant pump, the other end of refrigerant pump communicates with one end of expansion valve, the other end of expansion valve communicates with one end of evaporator, the other end of evaporator communicates with the other end of compressor, and the bypass pipe is established between the other end of refrigerant pump and liquid storage tank, the utility model discloses the bypass pipe is established between the other end of refrigerant pump and liquid storage tank, can make liquid storage tank borrow the refrigerant that is lifted overpressure by refrigerant pump, improve the pressure in liquid storage tank under refrigerant pump operation mode, promote the refrigerant discharge from liquid storage tank.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a device for preventing the refrigerant pump system from losing its pump head. Background Technology

[0002] In the field of modern refrigeration technology, refrigerant pump systems are widely used in data center cooling, industrial refrigeration, and other scenarios due to their advantages such as high efficiency, energy saving, and precise temperature control. This system uses a refrigerant pump to drive refrigerant circulation, achieving efficient heat transfer and release to meet the temperature control requirements of different scenarios.

[0003] However, in the actual operation of refrigerant pump systems, the problem of insufficient refrigerant pressure in the receiver tank leading to insufficient head flow severely restricts their performance and reliability. On the one hand, insufficient refrigerant charge in the receiver tank, abnormal valve closure, or leakage due to seal failure directly reduces the pressure inside the tank. On the other hand, sudden drops in ambient temperature and frequent system start-ups and shutdowns can also cause insufficient refrigerant vaporization in the receiver tank, making it difficult to maintain pressure. When the receiver tank pressure falls below a critical value, the refrigerant pressure at the pump's suction end cannot meet the circulation requirements, causing the pump to fail to generate sufficient head to drive the refrigerant flow, thus triggering insufficient head flow in the system. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a device to prevent the pump system from experiencing a loss of head.

[0005] The purpose of this utility model is achieved through the following technical solution: a device for preventing the pump system from losing its pump head, comprising a compressor, a condenser, a liquid receiver, a refrigerant pump, an expansion valve, an evaporator, a first switching valve, and a second switching valve;

[0006] The first switching valve is connected in parallel with the compressor; the second switching valve is connected in parallel with the refrigerant pump; one end of the compressor is connected to one end of the condenser; the other end of the condenser is connected to the liquid receiver; the liquid receiver is connected to one end of the refrigerant pump; the other end of the refrigerant pump is connected to one end of the expansion valve; the other end of the expansion valve is connected to one end of the evaporator; the other end of the evaporator is connected to the other end of the compressor.

[0007] A bypass pipe is provided between the other end of the refrigerant pump and the liquid storage tank.

[0008] The present invention is further configured such that the bottom of the liquid storage tank is provided with a liquid outlet; the liquid outlet is connected to one end of the refrigerant pump.

[0009] The present invention is further configured such that the liquid storage tank is provided with a liquid inlet pipe; one end of the liquid inlet pipe is located above the liquid outlet; and the other end of the liquid inlet pipe is connected to the other end of the condenser.

[0010] The present invention is further configured such that the top of the liquid storage tank is provided with a reflux port; the reflux port is connected to one end of the bypass pipe; and the other end of the bypass pipe is connected to the other end of the refrigerant pump.

[0011] The present invention is further configured such that the first switching valve is a one-way valve.

[0012] The present invention is further configured such that the second switching valve is a one-way valve.

[0013] The present invention is further configured such that one end of the second switching valve is connected to one end of the refrigerant pump; the other end of the second switching valve is located between the other end of the refrigerant pump and the other end of the bypass pipe.

[0014] The present invention is further configured such that one end of the second switching valve is connected to one end of the refrigerant pump; and the other end of the bypass pipe is located between the other end of the refrigerant pump and the other end of the second switching valve.

[0015] The beneficial effects of this utility model are as follows: By providing a bypass pipe between the other end of the refrigerant pump and the liquid receiver, the liquid receiver can use the refrigerant that has been pressurized by the refrigerant pump to increase the pressure inside the liquid receiver during the refrigerant pump operation mode, thereby prompting the refrigerant to be discharged from the liquid receiver. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the connection structure of Embodiment 1 of this utility model;

[0017] Figure 2 This is a schematic diagram of the connection structure of Embodiment 2 of this utility model;

[0018] The components are: 1. Compressor; 2. Condenser; 3. Liquid receiver; 31. Liquid outlet; 32. Liquid inlet pipe; 33. Reflux outlet; 4. Refrigerant pump; 5. Expansion valve; 6. Evaporator; 7. First switching valve; 8. Second switching valve; 9. Bypass pipe. Detailed Implementation

[0019] The present invention will be further described in conjunction with the following embodiments.

[0020] Example 1, by Figure 1 As can be seen, the device for preventing the refrigerant pump system from losing its pump head as described in this embodiment includes a compressor 1, a condenser 2, a liquid receiver 3, a refrigerant pump 4, an expansion valve 5, an evaporator 6, a first switching valve 7, and a second switching valve 8.

[0021] The first switching valve 7 is connected in parallel with the compressor 1; the second switching valve 8 is connected in parallel with the refrigerant pump 4; one end of the compressor 1 is connected to one end of the condenser 2; the other end of the condenser 2 is connected to the liquid receiver 3; the liquid receiver 3 is connected to one end of the refrigerant pump 4; the other end of the refrigerant pump 4 is connected to one end of the expansion valve 5; the other end of the expansion valve 5 is connected to one end of the evaporator 6; the other end of the evaporator 6 is connected to the other end of the compressor 1.

[0022] A bypass pipe 9 is provided between the other end of the refrigerant pump 4 and the liquid storage tank 3.

[0023] Specifically, in this embodiment, the device for preventing the refrigerant pump system from losing its pump head consists of a compressor 1, a condenser 2, a liquid receiver 3, a second switching valve 8, an expansion valve 5, and an evaporator 6 connected in sequence to form a compressor refrigeration system; and a first switching valve 7, a condenser 2, a liquid receiver 3, a refrigerant pump 4, an expansion valve 5, and an evaporator 6 connected in sequence to form a refrigerant pump refrigeration system.

[0024] During the operation of the refrigerant pump refrigeration system, the second switch valve 8 is disconnected while the first switch valve 7 is opened, and the refrigerant pump 4 starts to work. The refrigerant flows from the condenser 2 to the liquid receiver 3, and then from the liquid receiver 3 to the refrigerant pump 4. At this time, the refrigerant does not pass through the second switch valve 8. Part of the refrigerant pumped out by the refrigerant pump 4 runs to the expansion valve 5, and the other part of the refrigerant flows to the liquid receiver 3 through the bypass pipe 9 because the outlet pressure of the refrigerant pump 4 is greater than the pressure of the liquid receiver 3.

[0025] During the operation of the compressor refrigeration system, when the first switch valve 7 is disconnected and the second switch valve 8 is opened, the refrigerant pump 4 is not running while the compressor 1 is working. Since the refrigerant pump 4 is not running, the refrigerant cannot pass through the refrigerant pump 4. After the refrigerant comes out of the liquid receiver 3, it passes through the second switch valve 8, expansion valve 5, evaporator 6, compressor 1 and condenser 2 in sequence before returning to the liquid receiver 3.

[0026] In this embodiment, by providing a bypass pipe 9 between the other end of the refrigerant pump 4 and the liquid receiver 3, the liquid receiver 3 can utilize the refrigerant that has been pressurized by the refrigerant pump 4 to increase the pressure within the liquid receiver 3 during the operation of the refrigerant pump 4. This facilitates the discharge of refrigerant from the liquid receiver 3, ensuring sufficient liquid refrigerant at the inlet of the refrigerant pump 4, increasing the inlet subcooling, and preventing the occurrence of head interruption. Furthermore, by providing a bypass pipe 9 between the other end of the refrigerant pump 4 and the liquid receiver 3, if refrigerant vaporizes in the pipeline between the other end of the refrigerant pump 4 and one end of the expansion valve 5, the vaporized refrigerant can be promptly discharged into the liquid receiver 3 through the bypass pipe 9.

[0027] This embodiment describes a device for preventing the refrigerant pump system from losing its pump head. The bottom of the liquid storage tank 3 is provided with a liquid outlet 31; the liquid outlet 31 is connected to one end of the refrigerant pump 4. Through this arrangement, the refrigerant in the liquid storage tank 3 flows more easily to the refrigerant pump 4 under the influence of gravity, thereby increasing the pressure of the refrigerant entering the refrigerant pump 4.

[0028] This embodiment describes a device for preventing refrigerant pump system head interruption. The liquid storage tank 3 is equipped with an inlet pipe 32; one end of the inlet pipe 32 is located above the outlet 31; the other end of the inlet pipe 32 is connected to the other end of the condenser 2. This arrangement allows the refrigerant from the condenser 2 to enter the liquid storage tank 3 from above the liquid surface through the inlet pipe 32, ensuring refrigerant flow throughout the system.

[0029] This embodiment describes a device for preventing head interruption in a refrigerant pump system. The top of the liquid storage tank 3 is provided with a return port 33. The return port 33 is connected to one end of a bypass pipe 9, and the other end of the bypass pipe 9 is connected to the other end of a refrigerant pump 4. Specifically, one end of the bypass pipe 9 is connected to the top of the liquid storage tank 3, meaning that the refrigerant pumped from the refrigerant pump 4 can flow to the top of the liquid surface in the liquid storage tank 3. This increases the pressure in the liquid storage tank 3 while preventing the formation of bubbles inside the tank, which would cause the liquid refrigerant to vaporize and affect the subcooling at the inlet of the refrigerant pump 4, thus preventing head interruption.

[0030] In this embodiment, a device for preventing the refrigerant pump system from losing its pump head is described, wherein the first switching valve 7 is a one-way valve. This design prevents backflow from the compressor 1.

[0031] In this embodiment, a device for preventing refrigerant pump system from losing its pump head is described, wherein the second switching valve 8 is a one-way valve. This design prevents backflow from the refrigerant pump 4.

[0032] This embodiment describes a device for preventing refrigerant pump system from losing its head. One end of the second switching valve 8 is connected to one end of the refrigerant pump 4; the other end of the bypass pipe 9 is located between the other end of the refrigerant pump 4 and the other end of the second switching valve 8. Specifically, through the above arrangement, the bypass pipe 9 does not pass through the second switching valve 8, and the bypass flow is not constrained by the second switching valve 8; in addition, high-pressure refrigerant is directly injected into the top of the liquid storage tank 3 through the bypass pipe 9, quickly increasing the pressure inside the liquid storage tank 3 and preventing the refrigerant pump 4 from losing its head due to insufficient pressure.

[0033] Example 2, as Figure 2 As shown in the embodiment, in the device for preventing the refrigerant pump system from losing its head, one end of the second switching valve 8 is connected to one end of the refrigerant pump 4; the other end of the second switching valve 8 is located between the other end of the refrigerant pump 4 and the other end of the bypass pipe 9.

[0034] Specifically, the connection method in this embodiment is more flexible than that in embodiment 1. Different connection positions can be selected according to actual working conditions. By reasonably arranging the connection positions of the bypass pipe 9 and the second switch valve 8, this utility model can flexibly cope with different working conditions, thereby improving the applicability of the device.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A device for preventing head interruption in a fluorine pump system, characterized in that: It includes a compressor (1), a condenser (2), a liquid receiver (3), a refrigerant pump (4), an expansion valve (5), an evaporator (6), a first switching valve (7), and a second switching valve (8); The first switching valve (7) is connected in parallel with the compressor (1); the second switching valve (8) is connected in parallel with the refrigerant pump (4); one end of the compressor (1) is connected to one end of the condenser (2); the other end of the condenser (2) is connected to the liquid storage tank (3); the liquid storage tank (3) is connected to one end of the refrigerant pump (4); the other end of the refrigerant pump (4) is connected to one end of the expansion valve (5); the other end of the expansion valve (5) is connected to one end of the evaporator (6); the other end of the evaporator (6) is connected to the other end of the compressor (1). A bypass pipe (9) is provided between the other end of the refrigerant pump (4) and the liquid storage tank (3).

2. The device for preventing head interruption in a fluorine pump system according to claim 1, characterized in that: The bottom of the liquid storage tank (3) is provided with a liquid outlet (31); the liquid outlet (31) is connected to one end of the refrigerant pump (4).

3. The device for preventing head interruption in a fluorine pump system according to claim 2, characterized in that: The storage tank (3) is provided with an inlet pipe (32); one end of the inlet pipe (32) is located above the outlet (31); the other end of the inlet pipe (32) is connected to the other end of the condenser (2).

4. The device for preventing head interruption in a fluorine pump system according to claim 1, characterized in that: The top of the liquid storage tank (3) is provided with a reflux port (33); the reflux port (33) is connected to one end of the bypass pipe (9); the other end of the bypass pipe (9) is connected to the other end of the refrigerant pump (4).

5. The device for preventing head interruption in a fluorine pump system according to claim 1, characterized in that: The first switching valve (7) is a one-way valve.

6. The device for preventing head interruption in a fluorine pump system according to claim 1, characterized in that: The second switching valve (8) is a one-way valve.

7. The device for preventing head interruption in a fluorine pump system according to claim 4, characterized in that: One end of the second switching valve (8) is connected to one end of the refrigerant pump (4); the other end of the second switching valve (8) is located between the other end of the refrigerant pump (4) and the other end of the bypass pipe (9).

8. The device for preventing head interruption in a fluorine pump system according to claim 4, characterized in that: One end of the second switching valve (8) is connected to one end of the refrigerant pump (4); the other end of the bypass pipe (9) is located between the other end of the refrigerant pump (4) and the other end of the second switching valve (8).

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