Evaporation and condensation type fluorine pump water chilling unit

Abstract

The utility model provides an evaporation and condensation type fluorine pump water chilling unit which comprises a mechanical refrigeration mode and a natural cold source mode, in the mechanical refrigeration mode, an inverter compressor is started, and a refrigerant pump, a first electromagnetic valve, a second electromagnetic valve and an electric butterfly valve are closed; a refrigerant of the compressor sequentially passes through the evaporative condenser, the first drying filter, the electronic expansion valve, the evaporator and the gas-liquid separator and then returns to the compressor; in the natural cold source mode, the inverter compressor is closed, and the refrigerant pump, the first electromagnetic valve and the electric butterfly valve are opened; refrigerant discharged by the refrigerant pump sequentially passes through the first electromagnetic valve, the manual expansion valve, the evaporator, the electric butterfly valve and the evaporative condenser and then returns to the refrigerant pump. According to the unit, a fluorine pump, an evaporation condensation technology and a compressor refrigeration technology are combined, when the environment is high, a mechanical refrigeration compressor mode is operated, when the environment is low, a fluorine pump natural cold source mode is operated, the dry-bulb temperature and the wet-bulb temperature of a natural cold source are fully utilized, energy consumption is reduced to the maximum extent, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of chillers, in particular to an evaporative condenser type fluorine pump chiller. Background Art

[0002] With the rapid development of industries such as cloud computing, big data, and the Internet of Things, data centers, as carriers for massive data computing and storage, have seen their quantity and scale grow at an accelerating rate year by year. Along with the rapid development, there are common problems such as huge energy consumption and an urgent need to improve the level of green energy conservation. Therefore, reducing carbon emissions in data centers has also been emphasized by the industry. Through statistics and analysis, among the high energy consumption challenges faced by data centers, the energy consumption of the refrigeration system accounts for about 40% of the total energy consumption of the data center. Therefore, applying new technologies and new products to improve the energy conservation level of the refrigeration system, reduce power consumption, and enhance the energy efficiency level has become the core consensus in the industry.

[0003] The evaporative condenser is one of the main heat exchange components in the refrigeration system. It uses the evaporation of water and forced air circulation to take away the condensation heat to cool the high-temperature and high-pressure superheated steam discharged from the compressor, condensing it into a liquid, integrating the shell-and-tube heat exchanger and the cooling tower of the traditional water-cooled chiller. Compared with the water-cooled chiller, it reduces the power consumption of the cooling water pump, has a high heat exchange efficiency, and a high energy efficiency of the unit.

[0004] In the current traditional natural cold source utilization technology, generally, an additional heat exchanger is added to exchange heat between the chilled water and the low-temperature outdoor environment, and the outdoor dry bulb temperature is used for cooling treatment, but the lower wet bulb temperature cannot be effectively utilized. Summary of the Utility Model

[0005] The utility model provides an evaporative condenser type fluorine pump chiller to solve the technical problems raised in the background art.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0007] An evaporative condenser type fluorine pump chiller includes an evaporative condenser, a variable-frequency compressor, a first one-way valve, a first butterfly valve, a first ball valve, a first dryer filter, a second one-way valve, an electronic expansion valve, a second ball valve, an evaporator, a second butterfly valve, and a gas-liquid separator; the outlet end of the variable-frequency compressor is sequentially connected to the first one-way valve, the first butterfly valve, the first port, the second port of the evaporative condenser, the first ball valve, the first dryer filter, the second one-way valve, the electronic expansion valve, the second ball valve, the first port, the second port of the evaporator, the second butterfly valve, the first port, the second port of the gas-liquid separator, and the inlet end of the variable-frequency compressor; a cooling circuit is connected between the outlet side of the first dryer filter and the variable-frequency compressor, and the cooling circuit includes a third ball valve and a sight glass;

[0008] It also includes a refrigerant pump, a second drying filter, a first solenoid valve, a manual expansion valve, a fourth butterfly valve, an electric butterfly valve, a fourth ball valve, and a fifth ball valve; the outlet end of the refrigerant pump is sequentially connected to the second drying filter, the first solenoid valve, the manual expansion valve, the first port, the third port of the evaporator, the fourth butterfly valve, the electric butterfly valve, the first port, the second port of the evaporative condenser, the fourth ball valve, the fifth ball valve, and the inlet end of the refrigerant pump; a bypass pipeline is connected between the inlet side of the fourth ball valve and the outlet side of the first solenoid valve, and the bypass pipeline includes a second solenoid valve and a sixth ball valve.

[0009] Furthermore, the fluorine pump chiller includes a mechanical refrigeration mode and a natural cold source mode;

[0010] Mechanical refrigeration mode: The variable frequency compressor is turned on, and the refrigerant pump, the first solenoid valve, the second solenoid valve, and the electric butterfly valve are turned off; the refrigerant of the compressor sequentially passes through the evaporative condenser, the first drying filter, the electronic expansion valve, the evaporator, and the gas-liquid separator and returns to the compressor;

[0011] Natural cold source mode: The variable frequency compressor is turned off, and the refrigerant pump, the first solenoid valve, and the electric butterfly valve are turned on; the refrigerant discharged by the refrigerant pump sequentially passes through the first solenoid valve, the manual expansion valve, the evaporator, the electric butterfly valve, and the evaporative condenser and returns to the refrigerant pump.

[0012] Furthermore, it also includes a third butterfly valve, which is connected in parallel with the fourth butterfly valve, with one end connected to the fourth port of the evaporator and the other end connected to the outlet side of the fourth butterfly valve.

[0013] Furthermore, a liquid receiver is also provided at the second port of the evaporative condenser, and the fourth ball valve is connected in parallel with the liquid receiver; both outlet ends of the liquid receiver are connected to the first butterfly valve or the fifth ball valve. The liquid receiver is used to store the refrigerant difference amount during the operation of the mechanical refrigeration mode and the fluorine pump natural cold source mode.

[0014] Compared with the prior art, the utility model has the following advantages or technical effects:

[0015] Combining the fluorine pump, the evaporative condensation technology, and the compression refrigeration technology, through reasonable pipeline design and logical control, it maximally utilizes the natural cold source and reduces the compressor output; according to the outdoor environment and the outlet water temperature requirement of the unit, the operation mode is switched. When the environment is relatively high, the mechanical refrigeration compressor mode is operated, and when the environment is relatively low, the fluorine pump natural cold source mode is operated, fully utilizing the dry bulb temperature and wet bulb temperature of the natural cold source, minimizing energy consumption to the greatest extent, and improving the heat exchange efficiency; the utilization of the natural cold source technology ensures the reliable operation of the unit under the conditions of annual operation and partial load operation. Description of the Drawings

[0016] The present utility model, its features, appearance and advantages will become more obvious by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not necessarily drawn to scale, and the focus is on showing the gist of the present utility model.

[0017] Figure 1 It is a schematic structural diagram of an evaporative condenser type fluorine pump chiller;

[0018] Figure 2 It is a schematic diagram of the operation in the mechanical refrigeration mode;

[0019] Figure 3 It is a schematic diagram of the operation in the natural cold source mode;

[0020] In the figure, 1. Evaporative condenser, 2. Variable frequency compressor, 3. First check valve, 4. First butterfly valve, 5. Liquid receiver, 6. First ball valve, 7. First dryer filter, 8. Second check valve, 9. Electronic expansion valve, 10. Second ball valve, 11. Evaporator, 12. Second butterfly valve, 13. Gas-liquid separator, 14. Third ball valve, 15. Sight glass, 16. Refrigerant pump, 17. Second dryer filter, 18. First solenoid valve, 19. Manual expansion valve, 20. Third butterfly valve, 21. Fourth butterfly valve, 22. Electric butterfly valve, 23. Fourth ball valve, 24. Fifth ball valve, 25. Second solenoid valve, 26. Sixth ball valve. Detailed implementation manners

[0021] The following will describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Therefore, the detailed description of the embodiments of the present utility model provided in the following drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts belong to the protection scope of the present utility model.

[0022] Please refer to the attached Figure 1, the present utility model provides an evaporative condensing fluorine pump chiller, which includes an evaporative condenser 1, a variable frequency compressor 2, a first check valve 3, a first butterfly valve 4, a first ball valve 6, a first dryer filter 7, a second check valve 8, an electronic expansion valve 9, a second ball valve 10, an evaporator 11, a second butterfly valve 12 and a gas-liquid separator 13. The outlet end of the variable frequency compressor 2 is sequentially connected to the first check valve 3, the first butterfly valve 4, the first port, the second port of the evaporative condenser 1, the first ball valve 6, the first dryer filter 7, the second check valve 8, the electronic expansion valve 9, the second ball valve 10, the first port, the second port of the evaporator 11, the second butterfly valve 12, the first port, the second port of the gas-liquid separator 13, and the inlet end of the variable frequency compressor 2.

[0023] Further explanation, the variable frequency compressor 2 is connected with a cooling circuit, which includes a third ball valve 14 and a sight glass 15. The inlet of the third ball valve is connected to the outlet of the first dryer filter 7, and the outlet of the sight glass 15 is connected to the variable frequency compressor 2.

[0024] An evaporative condensing fluorine pump chiller further includes a refrigerant pump 16, a second dryer filter 17, a first solenoid valve 18, a manual expansion valve 19, a fourth butterfly valve 21, an electric butterfly valve 22, a fourth ball valve 23 and a fifth ball valve 24. The outlet end of the refrigerant pump 16 is sequentially connected to the second dryer filter 17, the first solenoid valve 18, the manual expansion valve 19, the first port, the third port of the evaporator 11, the fourth butterfly valve 21, the electric butterfly valve 22, the first port, the second port of the evaporative condenser 1, the fourth ball valve 23, the fifth ball valve 24 and the inlet end of the refrigerant pump 16. The refrigerant 16 is provided with a bypass pipeline in parallel. The bypass pipeline includes a second solenoid valve 25 and a sixth ball valve 26. The inlet side of the bypass pipeline is connected to the outlet side of the first solenoid valve 18, and the outlet side is connected to the inlet side of the fourth ball valve 23. The bypass pipeline is mainly used in the initial stage of the natural cold source operation mode. When the effect of the evaporative condenser is poor and the liquid supply at the inlet of the refrigerant pump 16 is insufficient, the second solenoid valve 25 is opened, and part of the refrigerant returns to the inlet of the refrigerant pump 16 through the bypass pipeline composed of the second solenoid valve 25 and the sixth ball valve 26 to ensure the normal operation of the refrigerant pump 16. When the entire refrigeration system operates normally, the second solenoid valve 25 is closed.

[0025] Further explanation: It further includes a third butterfly valve 20, which is in parallel with the fourth butterfly valve 21. The inlet side of the third butterfly valve 20 is connected to the upper outlet of the evaporator 11, i.e., the fourth port, and the outlet side is connected to the outlet side of the fourth butterfly valve 21. The inlet side of the fourth butterfly valve 21 is connected to the lower outlet of the evaporator 11, i.e., the third port, so that the refrigerant gas and refrigerant liquid that are not completely evaporated in the evaporator 11 can all enter the entire refrigerant cycle. A liquid receiver 5 is also provided at the second port of the evaporative condenser 1. The fourth ball valve 23 is in parallel with the liquid receiver 5. Both outlet ends of the liquid receiver 5 are connected to the first butterfly valve 4 or the fifth ball valve 24. The liquid receiver 5 is used to store the difference in refrigerant amounts during the operation of the mechanical refrigeration mode and the fluorine pump natural cold source mode.

[0026] As shown in the Figures 2-3 accompanying drawings, an evaporative condenser type fluorine pump chiller includes two operating modes:

[0027] Mechanical refrigeration mode: The variable frequency compressor 2 is turned on, and the refrigerant pump 16, the first solenoid valve 18, the second solenoid valve 25, and the electric butterfly valve 22 are turned off. The refrigerant of the compressor 2 sequentially passes through the evaporative condenser 1, the first dryer filter 7, the electronic expansion valve 9, the evaporator 11, and the gas-liquid separator 13 and returns to the compressor 2.

[0028] Fluorine pump natural cold source mode: The variable frequency compressor 2 is turned off, and the refrigerant pump 16, the first solenoid valve 18, and the electric butterfly valve 22 are turned on. The refrigerant discharged by the refrigerant pump 16 sequentially passes through the first solenoid valve 18, the manual expansion valve 19, the evaporator 11, the electric butterfly valve 22, and the evaporative condenser 1 and returns to the refrigerant pump 16.

[0029] An evaporative condenser type fluorine pump chiller provided by the present utility model combines a fluorine pump, evaporative condensation technology, and compression refrigeration technology. When the environment temperature is relatively high, it operates in the mechanical refrigeration compressor mode. When the environment temperature is relatively low, it operates in the fluorine pump natural cold source mode, making full use of the dry bulb temperature and wet bulb temperature of the natural cold source, minimizing energy consumption to the greatest extent, and improving the heat exchange efficiency.

[0030] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made by using the description and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. An evaporative condensing fluorine pump chiller, characterized in that: The invention comprises an evaporative condenser (1), a variable frequency compressor (2), a first non-return valve (3), a first butterfly valve (4), a first ball valve (6), a first filter dryer (7), a second non-return valve (8), an electronic expansion valve (9), a second ball valve (10), an evaporator (11), a second butterfly valve (12) and a gas-liquid separator (13); the outlet end of the variable frequency compressor (2) is connected in sequence to the first non-return valve (3), the first butterfly valve (4), the first port and the second port of the evaporative condenser (1), the first ball valve (6), the first filter dryer (7), the second non-return valve (8), the electronic expansion valve (9), the second ball valve (10), the first port and the second port of the evaporator (11), the second butterfly valve (12), the first port and the second port of the gas-liquid separator (13), and the inlet end of the variable frequency compressor (2); a cooling circuit is connected between the outlet side of the first filter dryer (7) and the variable frequency compressor (2), and the cooling circuit comprises a third ball valve (14) and a sight glass (15); The refrigerant pump (16) further comprises a refrigerant pump (16), a second filter dryer (17), a first solenoid valve (18), a manual expansion valve (19), a fourth butterfly valve (21), an electric butterfly valve (22), a fourth ball valve (23), and a fifth ball valve (24); the outlet end of the refrigerant pump (16) is sequentially connected to the second filter dryer (17), the first solenoid valve (18), the manual expansion valve (19), the first port and the third port of the evaporator (11), the fourth butterfly valve (21), the electric butterfly valve (22), the first port and the second port of the evaporative condenser (1), the fourth ball valve (23), the fifth ball valve (24), and the inlet end of the refrigerant pump (16); a bypass pipeline is connected between the inlet side of the fourth ball valve (23) and the outlet side of the first solenoid valve (18), and the bypass pipeline comprises a second solenoid valve (25) and a sixth ball valve (26).

2. The evaporative condensing fluorine pump chiller according to claim 1, characterized in that: The fluorine pump chiller includes a mechanical refrigeration mode and a natural cooling source mode; Mechanical refrigeration mode: the variable frequency compressor (2) is turned on, and the refrigerant pump (16), the first solenoid valve (18), the second solenoid valve (25) and the electric butterfly valve (22) are turned off; the refrigerant of the compressor (2) passes through the evaporative condenser (1), the first drying filter (7), the electronic expansion valve (9), the evaporator (11), and the gas-liquid separator (13) in sequence and returns to the compressor (2); Natural cooling source mode: the variable frequency compressor (2) is turned off, and the refrigerant pump (16), the first solenoid valve (18) and the electric butterfly valve (22) are turned on; the refrigerant discharged from the refrigerant pump (16) passes through the first solenoid valve (18), the manual expansion valve (19), the evaporator (11), the electric butterfly valve (22), the evaporative condenser (1) in sequence, and returns to the refrigerant pump (16).

3. The evaporative condensing fluorine pump chiller according to claim 1, characterized in that: The third butterfly valve (20) is also included. The third butterfly valve (20) is connected in parallel with the fourth butterfly valve (21), one end of the third butterfly valve (20) is connected to the fourth port of the evaporator (11), and the other end is connected to the outlet side of the fourth butterfly valve (21).

4. The evaporative condensing fluorine pump chiller according to claim 1, characterized in that: The second port of the evaporative condenser (1) is further provided with a liquid reservoir (5), and the fourth ball valve (23) is connected in parallel with the liquid reservoir (5); and both outlet ends of the liquid reservoir (5) are connected to the first butterfly valve (4) or the fifth ball valve (24).

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