Fluorine pump compression refrigeration system

Abstract

The application provides a fluorine pump compression refrigeration system, which comprises a liquid storage part, a gas-liquid separator and a fluorine pump. The liquid storage part comprises a liquid storage cavity for storing refrigerant and a first liquid inlet connected with the liquid storage cavity. The gas-liquid separator comprises a shell, wherein the shell comprises a containing cavity and a liquid outlet connected with the containing cavity. The liquid outlet is selectively connected with or disconnected from the first liquid inlet. When the liquid outlet is connected with the first liquid inlet, the refrigerant in the containing cavity flows into the liquid storage cavity. The fluorine pump compression refrigeration system solves the problem that the operation reliability of the fluorine pump is threatened due to the gradual decrease of the coolant liquid remaining in the liquid storage part of the fluorine pump compression refrigeration system.

Description

Technical Field

[0001] This invention relates to the field of refrigeration technology, and more specifically, to a fluorine pump compression refrigeration system. Background Technology

[0002] With the widespread adoption of 4G and the gradual popularization of 5G, the heat generated by various data processing devices is increasing, placing higher demands on the cooling capacity and energy efficiency of data center air conditioning equipment. Utilizing outdoor natural cold sources during transitional seasons and cold winters to cool data centers can significantly reduce the operating costs of air conditioning equipment. A common approach is to use refrigerant pump air conditioning. In winter, the refrigerant pump is activated, stopping the compressor and using the refrigerant pump to drive the refrigerant for heat pipe cooling, greatly reducing equipment operating costs. The refrigerant pump compression refrigeration system is a composite system; the refrigerant pump heat pipe system shares the evaporator and condenser with the compression refrigeration system, as well as some shared refrigerant pipes and system components.

[0003] In a refrigerant pump compression refrigeration system operating in heat pipe mode, the refrigerant gas at the evaporator outlet may carry a large amount of unevaporated liquid refrigerant. This liquid refrigerant can easily accumulate in the gas pipes before entering the condenser, causing blockage and obstructing the flow of refrigerant gas in certain channels. This affects the uniformity of gas distribution and heat exchange efficiency in the condenser. Blockage also affects the flow resistance of the heat pipe circulation, potentially disrupting the stable operation of the refrigerant pump. Therefore, it is necessary to retain the liquid refrigerant at the evaporator outlet to prevent it from returning to the condenser. However, the more liquid refrigerant is retained, the less liquid remains in the reservoir, threatening the reliability of the refrigerant pump.

[0004] One existing technology provides a refrigeration system in which a liquid level gauge and an electrically controlled electric heater are installed inside the gas-liquid separator. The liquid level gauge detects the liquid level inside the separator, thereby determining the heating power of the electric heater to heat and vaporize the accumulated liquid inside the separator, preventing excessive liquid accumulation. However, this refrigeration system wastes electrical energy, directly heats and vaporizes unevaporated coolant liquid, wasting refrigeration capacity and reducing the overall energy efficiency of the system. Summary of the Invention

[0005] The main objective of this invention is to provide a fluorine pump compression refrigeration system to solve the problem in the prior art where the gradual reduction of coolant liquid in the liquid storage section of the fluorine pump compression refrigeration system threatens the operational reliability of the fluorine pump.

[0006] To achieve the above objectives, the present invention provides a fluorine pump compression refrigeration system, comprising: a liquid storage section having a liquid storage chamber for storing refrigerant and a first liquid inlet communicating with the liquid storage chamber; and a gas-liquid separator including a housing having a receiving cavity and a liquid outlet communicating with the receiving cavity, wherein the liquid outlet is selectively connected to or disconnected from the first liquid inlet so that when the liquid outlet is connected to the first liquid inlet, the refrigerant in the receiving cavity flows into the liquid storage chamber.

[0007] Furthermore, the fluorine pump compression refrigeration system also includes: a first connecting pipe, the first end of which is connected to the receiving cavity through a liquid outlet, and the second end of which is connected to a first liquid inlet; and a first control valve, which is disposed on the first connecting pipe to control the opening and closing of the first connecting pipe.

[0008] Furthermore, the first control valve is a solenoid valve, which is located outside the gas-liquid separator.

[0009] Furthermore, the refrigerant pump compression refrigeration system also includes: a first liquid level detection element, disposed within the receiving cavity, used to detect a first limit liquid level; a second liquid level detection element, disposed within the receiving cavity, used to detect a second limit liquid level, the second limit liquid level being higher than the first limit liquid level; and a controller, wherein the first liquid level detection element, the second liquid level detection element, and the solenoid valve are all communicatively connected to the controller. When the second liquid level detection element detects that the liquid level in the receiving cavity has risen to the second limit liquid level, it sends a first signal to the controller, and the controller controls the solenoid valve to open according to the first signal; when the first liquid level detection element detects that the liquid level in the receiving cavity has dropped to the first limit liquid level, it sends a second signal to the controller, and the controller controls the solenoid valve to close according to the second signal.

[0010] Furthermore, the first control valve is a float valve, which is located in the receiving cavity, so that the float valve controls the opening and closing of the first connecting pipe according to the liquid level in the receiving cavity.

[0011] Furthermore, the fluorine pump compression refrigeration system also includes a first check valve, which is disposed on the first connecting pipe.

[0012] Furthermore, the first liquid inlet is located at the top of the liquid storage section.

[0013] Furthermore, the liquid outlet and the first liquid inlet are located at the same height; or, the liquid outlet is set higher than the first liquid inlet.

[0014] Furthermore, the housing has a first outlet and a second outlet communicating with the receiving cavity; the fluorine pump compression refrigeration system also includes a compressor and a condenser, the outlet of the condenser communicating with the second inlet of the liquid storage section, and the second inlet communicating with the liquid storage cavity; wherein: the fluorine pump compression refrigeration system also includes a second check valve, the inlet of the second check valve communicating with the first outlet, and the outlet of the second check valve communicating with the inlet of the condenser; the inlet of the compressor communicating with the second outlet, and the outlet of the compressor communicating with the inlet of the condenser.

[0015] Furthermore, the housing has an inlet communicating with the receiving cavity; the refrigerant pump compression refrigeration system also includes: an evaporator, the outlet of which is connected to the inlet; a third check valve, the inlet of which is connected to the outlet of the liquid receiver, and the outlet of which is connected to the inlet of the evaporator; a refrigerant pump, the refrigerant pump and the third check valve being arranged in parallel between the evaporator and the liquid receiver, the inlet of which is connected to the outlet of the liquid receiver, and the outlet of which is connected to the inlet of the evaporator; and a throttle valve, the outlet of which is connected to the inlet of the evaporator, the inlet of which is connected to the outlet of the third check valve, and the inlet of which is connected to the outlet of the refrigerant pump.

[0016] According to the technical solution of this invention, the fluorine pump compression refrigeration system includes a liquid storage section and a gas-liquid separator. The liquid storage section has a liquid storage chamber for storing refrigerant and a first liquid inlet connected to the liquid storage chamber. The gas-liquid separator includes a shell with a receiving cavity and a liquid outlet connected to the receiving cavity. When the liquid outlet is connected to the first liquid inlet, the refrigerant liquid in the receiving cavity flows sequentially through the liquid outlet and the first liquid inlet back to the liquid storage chamber. This prevents the refrigerant liquid in the liquid storage chamber from gradually decreasing in the fluorine pump compression refrigeration system, which would affect the operation of the fluorine pump. This solves the problem in the prior art where the gradual decrease of refrigerant liquid remaining in the liquid storage section of the fluorine pump compression refrigeration system threatens the operational reliability of the fluorine pump, and also prevents excessive liquid accumulation in the gas-liquid separator. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of an embodiment of the fluorine pump compression refrigeration system according to the present invention is shown;

[0019] Figure 2 A schematic diagram of a second embodiment of the fluorine pump compression refrigeration system according to the present invention is shown;

[0020] Figure 3 A schematic diagram of a third embodiment of the fluorine pump compression refrigeration system according to the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 10. Liquid storage section; 11. Liquid storage chamber; 12. First liquid inlet; 13. Second liquid inlet; 20. Gas-liquid separator; 21. Shell; 211. Receiving cavity; 212. Liquid outlet; 213. First outlet; 214. Second outlet; 24. Inlet; 30. First connecting pipe; 40. First control valve; 41. Second float; 50. First liquid level detection element; 51. First retaining ring; 60. Second liquid level detection element; 61. Second retaining ring; 70. First check valve; 80. Compressor; 90. Condenser; 100. Second check valve; 110. Valve; 111. First valve inlet; 112. Second valve inlet; 113. Valve outlet; 114. Piston; 115. Spring; 120. Evaporator; 130. Third check valve; 140. Refrigerant pump; 150. Throttling valve. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0026] This invention provides a fluorine pump compression refrigeration system, please refer to... Figures 1 to 3 The device includes: a liquid storage section 10 having a liquid storage chamber 11 for storing refrigerant and a first liquid inlet 12 connected to the liquid storage chamber 11; and a gas-liquid separator 20 including a housing 21 having a receiving cavity 211 and a liquid outlet 212 connected to the receiving cavity 211. The liquid outlet 212 can be selectively connected to or disconnected from the first liquid inlet 12 so that when the liquid outlet 212 is connected to the first liquid inlet 12, the refrigerant in the receiving cavity 211 flows into the liquid storage chamber 11.

[0027] The refrigerant pump compression refrigeration system of the present invention includes a liquid storage section 10 and a gas-liquid separator 20. The liquid storage section 10 has a liquid storage chamber 11 for storing refrigerant and a first liquid inlet 12 communicating with the liquid storage chamber 11. The gas-liquid separator 20 includes a housing 21, which has a receiving cavity 211 and a liquid outlet 212 communicating with the receiving cavity 211. When the liquid outlet 212 is connected to the first liquid inlet 12, the refrigerant liquid in the receiving cavity 211 flows sequentially through the liquid outlet 212 and the first liquid inlet 12 back into the liquid storage chamber 11. This prevents the refrigerant liquid in the liquid storage chamber 11 from gradually decreasing in the refrigerant pump compression refrigeration system, which would affect the operation of the refrigerant pump. This solves the problem in the prior art where the gradual decrease of the refrigerant liquid remaining in the liquid storage section of the refrigerant pump compression refrigeration system threatens the operational reliability of the refrigerant pump, and also prevents excessive liquid accumulation in the gas-liquid separator.

[0028] Specifically, the refrigerant pump compression refrigeration system further includes: a first connecting pipe 30, the first end of which is connected to the receiving cavity 211 through the liquid outlet 212, and the second end of which is connected to the first liquid inlet 12; and a first control valve 40, which is disposed on the first connecting pipe 30 to control the opening and closing of the first connecting pipe 30.

[0029] In practice, the first control valve 40 is opened, the first connecting pipe 30 is connected, and the refrigerant liquid in the receiving cavity 211 flows sequentially through the liquid outlet 212, the first connecting pipe 30 and the first liquid inlet 12 back into the liquid storage cavity 11, so as to avoid the refrigerant liquid in the liquid storage cavity 11 gradually decreasing in the fluorine pump compression refrigeration system, which would affect the operation of the fluorine pump.

[0030] Optionally, the first control valve 40 is a solenoid valve located outside the gas-liquid separator 20. This configuration allows the controller to control the solenoid valve, precisely controlling the opening and closing of the first connecting pipe 30. Alternatively, the first control valve 40 can be a float valve located within the receiving cavity 211, allowing the float valve to control the opening and closing of the first connecting pipe 30 based on the liquid level within the receiving cavity 211. Figure 2 As shown, the second float 41 rises and falls with the level of the refrigerant liquid. The rise and fall of the second float 41 drives the float valve to open or close. When the liquid level rises to the predetermined high level, the second float 41 drives the float valve to open, and the first connecting pipe 30 is connected, so that the refrigerant liquid in the receiving cavity 211 returns to the liquid storage section 10 in time, avoiding the refrigerant liquid in the liquid storage section 10 being too low and affecting the operation of the refrigerant pump.

[0031] Specifically, when the first control valve 40 is a solenoid valve, the refrigerant pump compression refrigeration system further includes: a first liquid level detection element 50, disposed in the receiving cavity 211, which is used to detect a first limit liquid level; a second liquid level detection element 60, disposed in the receiving cavity 211, which is used to detect a second limit liquid level, which is higher than the first limit liquid level; and a controller, wherein the first liquid level detection element 50, the second liquid level detection element 60, and the solenoid valve are all communicatively connected to the controller. When the second liquid level detection element 60 detects that the liquid level in the receiving cavity 211 has risen to the second limit liquid level, it sends a first signal to the controller, and the controller controls the solenoid valve to open according to the first signal; when the first liquid level detection element 50 detects that the liquid level in the receiving cavity 211 has dropped to the first limit liquid level, it sends a second signal to the controller, and the controller controls the solenoid valve to close according to the second signal.

[0032] In specific implementation, such as Figure 1 As shown, when the second liquid level detector 60 detects that the liquid level in the receiving cavity 211 has risen to the second limit liquid level, the controller controls the solenoid valve to open and the first connecting pipe 30 to open, so that the refrigerant liquid in the receiving cavity 211 returns to the liquid storage section 10 in time, avoiding the refrigerant liquid in the liquid storage section 10 being too low and affecting the operation of the fluorine pump; when the first liquid level detector 50 detects that the liquid level in the receiving cavity 211 has dropped to the first limit liquid level, the controller controls the solenoid valve to close and the first connecting pipe 30 to disconnect. At this time, the refrigerant liquid in the receiving cavity 211 cannot return to the liquid storage section 10, so that the floating oil (compressor lubricating oil) on the top layer of the refrigerant liquid in the receiving cavity 211 can remain in the gas-liquid separator 20, preventing the lubricating oil from entering the fluorine pump compression refrigeration system and reducing the heat exchange efficiency.

[0033] Specifically, both the first liquid level detection element 50 and the second liquid level detection element 60 are first floats. The first liquid level detection element 50 is provided with first retaining rings 51 at both its upper and lower positions, and the first liquid level detection element 50 can only move up and down between the two first retaining rings 51. The second liquid level detection element 60 is provided with second retaining rings 61 at both its upper and lower positions, and the second liquid level detection element 60 can only move up and down between the two second retaining rings 61. When the refrigerant level drops, the first liquid level detection element 50 descends until it reaches the first retaining ring 51 below it and cannot move. The first liquid level detection element 50 detects that the liquid level in the receiving cavity 211 has dropped to the first limit liquid level and sends a second signal to the controller. The controller controls the solenoid valve to close and the first connecting pipe 30 to disconnect according to the second signal. When the refrigerant level rises, the second liquid level detection element 60 rises until it reaches the second retaining ring 61 above it and cannot move. At this time, the second liquid level detection element 60 detects that the liquid level in the receiving cavity 211 has risen to the second limit liquid level and sends a first signal to the controller. The controller controls the solenoid valve to open and the first connecting pipe 30 to open according to the first signal.

[0034] Specifically, the refrigerant pump compression refrigeration system also includes a first check valve 70, which is disposed on the first connecting pipe 30.

[0035] In practice, the flow direction of the first one-way valve 70 only allows refrigerant liquid to flow from the gas-liquid separator 20 to the liquid storage section 10, so as to prevent the refrigerant in the liquid storage section 10 from returning directly to the gas-liquid separator from the first connecting pipe 30, which would reduce the amount of refrigerant liquid in the liquid storage section 10 and affect the operation of the refrigerant pump.

[0036] Specifically, the first liquid inlet 12 is located at the top of the liquid storage section 10. This arrangement can prevent the first liquid inlet 12 from being submerged in the refrigerant inside the liquid storage section 10. Due to the influence of gravity of the refrigerant liquid inside the liquid storage section 10, the refrigerant liquid inside the gas-liquid separator 20 will not easily enter the liquid storage section 10, thus affecting the refrigerant liquid return efficiency.

[0037] Specifically, the liquid outlet 212 is at the same height as the first liquid inlet 12; or, the liquid outlet 212 is set higher than the first liquid inlet 12. Such a setting allows the refrigerant liquid in the gas-liquid separator 20 to enter the liquid storage section 10 more smoothly.

[0038] Specifically, the housing 21 has a first outlet 213 and a second outlet 214 communicating with the receiving cavity 211; the refrigerant pump compression refrigeration system also includes a compressor 80 and a condenser 90, the outlet of the condenser 90 communicating with the second liquid inlet 13 of the liquid storage section 10, and the second liquid inlet 13 communicating with the liquid storage cavity 11; wherein: the refrigerant pump compression refrigeration system also includes a second check valve 100, the inlet of the second check valve 100 communicating with the first outlet 213, and the outlet of the second check valve 100 communicating with the inlet of the condenser 90; the inlet of the compressor 80 communicating with the second outlet 214, and the outlet of the compressor 80 communicating with the inlet of the condenser 90; or, the refrigerant pump compression refrigeration system also includes a valve 110, the valve 110 having a first valve inlet The valve 110 has a first connected state where the first valve inlet 111 is connected to the valve outlet 113 and the second valve inlet 112 is disconnected from the valve outlet 113, and a second connected state where the first valve inlet 111 is disconnected from the valve outlet 113 and the second valve inlet 112 is connected to the valve outlet 113. The valve 110 is switchably configured between the first connected state and the second connected state. In this configuration, the first valve inlet 111 is connected to the first outlet 213, the inlet of the compressor 80 is connected to the second outlet 214, the outlet of the compressor 80 is connected to the inlet of the second valve inlet 112, and the valve outlet 113 is connected to the inlet of the condenser 90.

[0039] In specific implementation, such as Figure 3As shown, when the refrigerant pump compression refrigeration system also includes a second check valve 100, when the refrigerant pump compression refrigeration system is in compression refrigeration mode, the compressor 80 is running, and the pressure at the outlet of the second check valve is higher than the pressure at its inlet. At this time, the second check valve 100 is in the reverse high-pressure cut-off closed state and cannot be opened, that is, the refrigerant gas can only flow from the second outlet 214 through the compressor 80 and then into the condenser 90; when the refrigerant pump compression refrigeration system is in refrigerant pump refrigeration mode, the compressor 80 stops running, and the pressure at the outlet of the second check valve is lower than the pressure at its inlet. At this time, the second check valve 100 is in the open state and can be opened, that is, the refrigerant gas can only flow from the first outlet 213 through the second check valve 100 and then into the condenser 90.

[0040] In specific implementation, such as Figure 1 As shown, when the refrigerant pump compression refrigeration system also includes valve 110, valve 110 also includes a spring and a piston. The first end of piston 114 abuts against the second valve inlet 112, and the second end of piston 114 is connected to the first end of spring 115. The second end of spring 115 abuts against the first valve inlet 111. When the refrigerant pump compression refrigeration system is in compression refrigeration mode, compressor 80 runs. The pressure at the second valve inlet 112 is greater than the pressure at the first valve inlet 111. Piston 114 overcomes the elastic force of spring 115 and moves closer to the first valve inlet 111 until the first valve inlet 111 is disconnected from the valve outlet 113 and the second valve inlet 112 is connected to the valve outlet 113. That is, valve 110 switches to the second connected state, and refrigerant gas can only flow out from the second outlet 214, flowing sequentially through compressor 80, second valve inlet 112 and valve outlet 113 before flowing into condenser 90. When the refrigerant pump compression refrigeration system is in refrigerant pump refrigeration mode, compressor 80... When operation stops, the pressure difference between the second valve inlet 112 and the first valve inlet 111 gradually decreases, the spring returns to its original position, and the piston 114 moves towards the second valve inlet 112 under the elastic force of the spring 115 until the first valve inlet 111 is connected to the valve outlet 113 and the second valve inlet 112 is disconnected from the valve outlet 113. That is, the valve switches to the first connected state, and the refrigerant gas can only flow out from the first outlet 213 and then flow through the first valve inlet 111 and the valve outlet 113 in sequence before flowing into the condenser 90. The valve 110 can reduce the resistance encountered by the refrigerant gas when flowing through the second one-way valve 100, which is beneficial to improving the energy efficiency ratio of the refrigerant pump heat pipe cycle.

[0041] Specifically, the first valve inlet 111 cannot be connected to the second outlet 214 along with the compressor 80 inlet. The main reason is that the gas-liquid separator 20 also includes an outlet pipe connected to the second outlet. The outlet pipe has an oil return hole at its bottom and is a U-shaped pipe. If liquid accumulates inside the gas-liquid separator 20, and the liquid level overflows the oil return hole at the bottom of the U-shaped pipe, refrigerant liquid and / or lubricating oil will enter the U-shaped pipe, forming a liquid blockage. In refrigerant pump refrigeration mode, the refrigerant gas passing through the U-shaped pipe will encounter this liquid blockage resistance, resulting in the prior art problem or defect described in the background section. Therefore, the first valve inlet 111 is connected to the first outlet 213, and the compressor 80 inlet is connected to the second outlet 214.

[0042] Specifically, the housing 21 has an inlet 24 communicating with the receiving cavity 211; the refrigerant pump compression refrigeration system further includes: an evaporator 120, the outlet of which is connected to the inlet 24; a third check valve 130, the inlet of which is connected to the outlet of the liquid storage section 10, and the outlet of which is connected to the inlet of the evaporator 120; a refrigerant pump 140, which is connected in parallel with the third check valve 130 between the evaporator 120 and the liquid storage section 10, the inlet of which is connected to the outlet of the liquid storage section 10, and the outlet of which is connected to the inlet of the evaporator 120; and a throttle valve 150, the outlet of which is connected to the inlet of the evaporator 120, the inlet of which is connected to the outlet of the third check valve 130, and the inlet of which is connected to the outlet of the refrigerant pump 140.

[0043] Specifically, the refrigerant pump compression refrigeration system also includes a throttling valve 150, which is located between the inlet of the evaporator and the outlet of the third check valve 130, and also between the inlet of the evaporator 120 and the outlet of the refrigerant pump 140, for throttling the refrigerant liquid entering the evaporator 120.

[0044] In practice, the refrigerant gas and unevaporated refrigerant liquid at the outlet of evaporator 120 enter the gas-liquid separator 20 through inlet 24, where they are separated and stored. The refrigerant liquid returns to the liquid storage section, while the refrigerant gas enters the condenser, thus preventing the refrigerant liquid at the outlet of evaporator 120 from affecting the reliable operation of condenser 90.

[0045] In specific implementation, such as Figure 1As shown, when the refrigerant pump compression refrigeration system is in compression refrigeration mode, the refrigerant pump 140 stops running, the pressure at the outlet of the third one-way valve 130 is lower than the pressure at the inlet of the third one-way valve 130, the third one-way valve 130 is open, and the refrigerant liquid flows out from the liquid receiver 10 and then flows through the third one-way valve 130 and the throttle valve 150 before flowing into the evaporator 120; when the refrigerant pump compression refrigeration system is in refrigerant pump refrigeration mode, the refrigerant pump 140 starts running, the pressure at the inlet of the third one-way valve 130 is lower than the pressure at the outlet of the third one-way valve 130, the third one-way valve 130 is in the reverse high-pressure shut-off state, and the refrigerant liquid flows out from the liquid receiver 10 and then flows through the refrigerant pump 140 and the throttle valve 150 before entering the evaporator 120.

[0046] Example 1

[0047] In this embodiment, as Figure 1 As shown, the first control valve 40 is a solenoid valve, located outside the gas-liquid separator 20 and mounted on the first connecting pipe 30 to control the opening and closing of the first connecting pipe 30. The refrigerant pump compression refrigeration system also includes: a first liquid level detection element 50, located in the receiving cavity 211, used to detect a first limit liquid level; a second liquid level detection element 60, located in the receiving cavity 211, used to detect a second limit liquid level, which is higher than the first limit liquid level; and a controller, in which the first liquid level detection element 50, the second liquid level detection element 60, and the solenoid valve are all communicatively connected. When the second liquid level detection element 60 detects that the liquid level in the receiving cavity 211 has risen to the second limit liquid level, it sends a first signal to the controller, and the controller controls the solenoid valve to open according to the first signal; when the first liquid level detection element 50 detects that the liquid level in the receiving cavity 211 has dropped to the first limit liquid level, it sends a second signal. The signal is sent to the controller, which controls the solenoid valve to close according to the second signal; the refrigerant pump compression refrigeration system also includes a valve 110, which has a first valve inlet 111, a second valve inlet 112, and a valve outlet 113. The valve 110 has a first connected state in which the first valve inlet 111 is connected to the valve outlet 113 and the second valve inlet 112 is disconnected from the valve outlet 113, and a second connected state in which the first valve inlet 111 is disconnected from the valve outlet 113 and the second valve inlet 112 is connected to the valve outlet 113. The valve 110 can be switched between the first connected state and the second connected state; wherein, the first valve inlet 111 is connected to the first outlet 213, the inlet of the compressor 80 is connected to the second outlet 214, the outlet of the compressor 80 is connected to the inlet of the second valve inlet 112, and the valve outlet 113 is connected to the inlet of the condenser 90.

[0048] In specific implementation, such as Figure 1As shown, the refrigerant pump compression refrigeration system consists of a compressor 80, a valve 110, a condenser 90, a liquid receiver 10, a refrigerant pump 140, a throttle valve 150, an evaporator 120, and a gas-liquid separator 20 connected sequentially. In compression refrigeration mode, the refrigerant cycle is as follows: compressor 80 → second valve inlet 112 → valve outlet 113 → condenser 90 → liquid receiver 10 → third check valve 130 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → compressor 80. In refrigerant pump refrigeration mode, the refrigerant cycle is as follows: refrigerant pump 140 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → first valve inlet 111 → valve outlet 113 → condenser 90 → liquid receiver 10 → refrigerant pump 140.

[0049] Example 2

[0050] In this embodiment, as Figure 2 As shown, the first control valve 40 is a float valve, located in the receiving cavity 211, so that the float valve controls the opening and closing of the first connecting pipe 30 according to the liquid level in the receiving cavity 211; the refrigerant pump compression refrigeration system also includes a valve 110, which has a first valve inlet 111, a second valve inlet 112, and a valve outlet 113. The valve 110 has a first connected state in which the first valve inlet 111 is connected to the valve outlet 113 and the second valve inlet 112 is disconnected from the valve outlet 113, and a second connected state in which the first valve inlet 111 is disconnected from the valve outlet 113 and the second valve inlet 112 is connected to the valve outlet 113. The valve 110 can be switched between the first connected state and the second connected state; wherein, the first valve inlet 111 is connected to the first outlet 213, the inlet of the compressor 80 is connected to the second outlet 214, the outlet of the compressor 80 is connected to the inlet of the second valve inlet 112, and the valve outlet 113 is connected to the inlet of the condenser 90.

[0051] In specific implementation, such as Figure 2 As shown, the refrigerant pump compression refrigeration system consists of a compressor 80, a valve 110, a condenser 90, a liquid receiver 10, a refrigerant pump 140, a throttle valve 150, an evaporator 120, and a gas-liquid separator 20 connected sequentially. In compression refrigeration mode, the refrigerant cycle is as follows: compressor 80 → second valve inlet 112 → valve outlet 113 → condenser 90 → liquid receiver 10 → third check valve 130 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → compressor 80. In refrigerant pump refrigeration mode, the refrigerant cycle is as follows: refrigerant pump 140 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → first valve inlet 111 → valve outlet 113 → condenser 90 → liquid receiver 10 → refrigerant pump 140.

[0052] Example 3

[0053] In this embodiment, as Figure 3 As shown, the first control valve 40 is a solenoid valve, located outside the gas-liquid separator 20 and mounted on the first connecting pipe 30 to control the opening and closing of the first connecting pipe 30; the refrigerant pump compression refrigeration system also includes: a first liquid level detection element 50, located in the receiving cavity 211, used to detect a first limit liquid level; a second liquid level detection element 60, located in the receiving cavity 211, used to detect a second limit liquid level, which is higher than the first limit liquid level; and a controller, with the first liquid level detection element 50, the second liquid level detection element 60, and the solenoid valve all communicatively connected to the controller. When the second liquid level detection element 60 detects... When the liquid level in the receiving cavity 211 rises to the second limit liquid level, a first signal is sent to the controller, and the controller controls the solenoid valve to open according to the first signal; when the first liquid level detector 50 detects that the liquid level in the receiving cavity 211 has dropped to the first limit liquid level, a second signal is sent to the controller, and the controller controls the solenoid valve to close according to the second signal; the refrigerant pump compression refrigeration system also includes a second check valve 100, the inlet of the second check valve 100 is connected to the first outlet 213, and the outlet of the second check valve 100 is connected to the inlet of the condenser 90; the inlet of the compressor 80 is connected to the second outlet 214, and the outlet of the compressor 80 is connected to the inlet of the condenser 90.

[0054] In specific implementation, such as Figure 3 As shown, the refrigerant pump compression refrigeration system consists of a compressor 80, a second one-way valve 100, a condenser 90, a liquid receiver 10, a refrigerant pump 140, a throttle valve 150, an evaporator 120, and a gas-liquid separator 20 connected sequentially. In compression refrigeration mode, the refrigerant cycle is: compressor 80 → condenser 90 → liquid receiver 10 → third one-way valve 130 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → compressor 80; in refrigerant pump refrigeration mode, the refrigerant cycle is: refrigerant pump 140 → throttle valve 150 → evaporator 120 → gas-liquid separator 20 → second one-way valve 100 → condenser 90 → liquid receiver 10 → refrigerant pump 140.

[0055] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0056] The refrigerant pump compression refrigeration system of the present invention achieves refrigerant gas-liquid separation through a gas-liquid separator 20; by setting a first one-way valve 70 on the first connecting pipe 30, refrigerant is prevented from leaking back from the liquid storage section 10 to the gas-liquid separator when the refrigerant pump compression refrigeration system is in compression refrigeration mode; the first liquid level detection element 50 and the second liquid level detection element 60 provide feedback on the liquid level inside the gas-liquid separator 20, thereby indirectly controlling the opening and closing of the solenoid valve, ensuring that the refrigerant liquid trapped in the gas-liquid separator 20 can smoothly return to the liquid storage section 10, thereby preventing the refrigerant liquid from returning from the evaporator 120 to the condenser 90, thus overcoming the phenomenon of liquid blockage in the gas pipeline, ensuring the performance of the condenser 90 while ensuring that there is enough refrigerant liquid in the liquid storage section 10 for the safe operation of the refrigerant pump 140, solving the problem of refrigerant liquid trapping and transfer at the evaporator outlet in the refrigerant pump heat pipe mode and its control method, and also solving the problem of excessive resistance of refrigerant gas flowing through the one-way valve.

[0057] The refrigerant pump compression refrigeration system of the present invention includes a liquid storage section 10 and a gas-liquid separator 20. The liquid storage section 10 has a liquid storage chamber 11 for storing refrigerant and a first liquid inlet 12 communicating with the liquid storage chamber 11. The gas-liquid separator 20 includes a housing 21, which has a receiving cavity 211 and a liquid outlet 212 communicating with the receiving cavity 211. When the liquid outlet 212 is connected to the first liquid inlet 12, the refrigerant liquid in the receiving cavity 211 flows sequentially through the liquid outlet 212 and the first liquid inlet 12 back into the liquid storage chamber 11. This prevents the refrigerant liquid in the liquid storage chamber 11 from gradually decreasing in the refrigerant pump compression refrigeration system, which would affect the operation of the refrigerant pump. This solves the problem in the prior art where the gradual decrease of the refrigerant liquid remaining in the liquid storage section of the refrigerant pump compression refrigeration system threatens the operational reliability of the refrigerant pump, and also prevents excessive liquid accumulation in the gas-liquid separator.

[0058] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0059] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0060] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A fluorine pump compression refrigeration system, characterized in that, include: The liquid storage section (10) has a liquid storage chamber (11) for storing refrigerant and a first liquid inlet (12) connected to the liquid storage chamber (11). A gas-liquid separator (20) includes a housing (21) having a receiving cavity (211) and a liquid outlet (212) communicating with the receiving cavity (211). The liquid outlet (212) can be selectively connected to or disconnected from the first liquid inlet (12) so that when the liquid outlet (212) is connected to the first liquid inlet (12), the refrigerant in the receiving cavity (211) flows into the liquid storage cavity (11). The fluorine pump compression refrigeration system also includes: The first connecting pipe (30) has its first end connected to the receiving cavity (211) through the liquid outlet (212), and its second end connected to the first liquid inlet (12). A first control valve (40) is provided on the first connecting pipe (30) to control the opening and closing of the first connecting pipe (30); The fluorine pump compression refrigeration system also includes: A first liquid level detection element (50) is disposed in the receiving cavity (211), and the first liquid level detection element (50) is used to detect the first limit liquid level; A second liquid level detection element (60) is disposed in the receiving cavity (211). The second liquid level detection element (60) is used to detect a second limit liquid level, which is higher than the first limit liquid level. The controller is connected to the first liquid level detection device (50), the second liquid level detection device (60), and the first control valve (40). When the second liquid level detection device (60) detects that the liquid level in the receiving cavity (211) has risen to the second limit liquid level, it sends a first signal to the controller. The controller controls the first control valve (40) to open according to the first signal. When the first liquid level detection device (50) detects that the liquid level in the receiving cavity (211) has dropped to the first limit liquid level, it sends a second signal to the controller. The controller controls the first control valve (40) to close according to the second signal. The housing (21) has an inlet (24) communicating with the receiving cavity (211). The fluorine pump compression refrigeration system also includes: An evaporator (120) having its outlet connected to its inlet (24); The inlet of the third check valve (130) is connected to the outlet of the liquid storage section (10), and the outlet of the third check valve (130) is connected to the inlet of the evaporator (120). A fluorine pump (140) and a third check valve (130) are connected in parallel between the evaporator (120) and the liquid storage section (10). The inlet of the fluorine pump (140) is connected to the outlet of the liquid storage section (10), and the outlet of the fluorine pump (140) is connected to the inlet of the evaporator (120).

2. The fluorine pump compression refrigeration system according to claim 1, characterized in that, The first control valve (40) is a solenoid valve, which is located outside the gas-liquid separator (20).

3. The fluorine pump compression refrigeration system according to claim 1, characterized in that, The first control valve (40) is a float valve, which is located in the receiving cavity (211) so that the float valve controls the opening and closing of the first connecting pipe (30) according to the liquid level in the receiving cavity (211).

4. The fluorine pump compression refrigeration system according to any one of claims 1 to 3, characterized in that, The fluorine pump compression refrigeration system also includes a first check valve (70), which is disposed on the first connecting pipe (30).

5. The fluorine pump compression refrigeration system according to any one of claims 1 to 3, characterized in that, The first liquid inlet (12) is located at the top of the liquid storage section (10).

6. The fluorine pump compression refrigeration system according to any one of claims 1 to 3, characterized in that, The liquid outlet (212) and the first liquid inlet (12) are located at the same height; or The liquid outlet (212) is positioned higher than the first liquid inlet (12).

7. The fluorine pump compression refrigeration system according to any one of claims 1 to 3, characterized in that, The housing (21) has a first outlet (213) and a second outlet (214) communicating with the receiving cavity (211); the fluorine pump compression refrigeration system further includes a compressor (80) and a condenser (90), the outlet of the condenser (90) communicating with the second liquid inlet (13) of the liquid storage section (10), and the second liquid inlet (13) communicating with the liquid storage cavity (11); wherein: The fluorine pump compression refrigeration system further includes a second check valve (100), the inlet of which is connected to the first outlet (213), and the outlet of which is connected to the inlet of the condenser (90); the inlet of the compressor (80) is connected to the second outlet (214), and the outlet of the compressor (80) is connected to the inlet of the condenser (90).

8. The fluorine pump compression refrigeration system according to any one of claims 1 to 3, characterized in that, A throttle valve (150) is provided, the outlet of which is connected to the inlet of the evaporator (120), the inlet of which is connected to the outlet of the third check valve (130), and the inlet of which is connected to the outlet of the fluorine pump (140).

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