A cooling unit for a data center

Abstract

The present invention discloses a data center cooling unit, including a fluorine pump cooling module, a spray cooling module, and a compressor cooling module. The spray cooling module includes an indirect evaporative heat exchanger, a nozzle for spraying water onto the indirect evaporative heat exchanger, a water pump connected to the nozzle, and a water collection tank for supplying water to the water pump. One end of the airflow channel of the indirect evaporative heat exchanger is connected to the return air port, and the other end of the airflow channel of the indirect evaporative heat exchanger is connected to the air supply port. The lower part of the water sprinkling channel of the indirect evaporative heat exchanger is connected to the fresh air port, and the upper part of the water sprinkling channel of the indirect evaporative heat exchanger is connected to the exhaust port. The spray cooling module uses outdoor fresh air to accelerate evaporation and cooling of the water film in the water sprinkling channel of the indirect evaporative heat exchanger, and then cools the hot return air in the airflow channel of the indirect evaporative heat exchanger. Only the exhaust fan is used, and the cooling effect is very significant, the energy consumption is low, and the cooling efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of server heat dissipation refrigeration units, in particular to a data center cooling unit. Background Art

[0002] With the development of information technology, the heat dissipation of servers and the heat dissipation density of computer rooms have increased. The precision air conditioning heat dissipation method that relies on electricity will be gradually replaced by a new refrigeration method. Evaporative cooling technology is a technology that uses dry air to produce cold air. It can provide cold air according to the needs of the terminal and provide cooling for the data center. Evaporative cooling air conditioning technology is an environmentally friendly, efficient and economical cooling method that uses the dry bulb temperature and dew point temperature difference of dry air from renewable energy in the natural environment to obtain cold energy through heat and moisture exchange between water and air. It has a low cooling equipment cost and can greatly reduce electricity consumption and the requirements for electricity during peak hours. The evaporative cooling technology is applied to the air conditioning system of the data room that needs to provide cold energy throughout the year, and is used in conjunction with artificial cold sources. It has great energy-saving potential, but when the outdoor temperature and humidity are high, the cooling effect is not obvious. Therefore, it is now necessary to cool the unit to improve the cooling effect of the unit. Summary of the invention

[0003] The present invention aims to solve the above-mentioned deficiencies in the prior art and provides a data center cooling unit that fully utilizes fluorine pump refrigeration, indirect evaporative cooling module, and mechanical refrigeration to achieve efficient heat exchange and utilizes outdoor cold air to achieve free refrigeration.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A data center cooling unit, comprising a fluorine pump cooling module, a spray cooling module, and a compressor cooling module, wherein the spray cooling module comprises an indirect evaporative heat exchanger, a nozzle for spraying water onto the indirect evaporative heat exchanger, a water pump connected to the nozzle, and a water collection tank for supplying water to the water pump, wherein one end of an air flow channel of the indirect evaporative heat exchanger is connected to an air return port, and the other end of an air flow channel of the indirect evaporative heat exchanger is connected to an air supply port, the lower part of a water spray channel of the indirect evaporative heat exchanger is connected to a fresh air port, and the upper part of a water spray channel of the indirect evaporative heat exchanger is connected to an exhaust port;

[0006] The fluorine pump evaporator of the fluorine pump cooling module is arranged at the fresh air inlet, and the compressor evaporator of the compressor cooling module is arranged at the air supply outlet.

[0007] The return air vent is connected to the hot air duct after heat exchange in the data center, the supply air vent is connected to the cooling air duct of the data center, and the fresh air vent is connected to the outdoor air.

[0008] The nozzle is arranged on the upper part of the water spraying channel of the indirect evaporative heat exchanger, and the nozzle is installed on a water pipe connected to a water pump.

[0009] The fluorine pump condenser of the fluorine pump cooling module and the compressor condenser of the compressor cooling module are both arranged between the nozzle and the exhaust port, and an exhaust fan is arranged in the exhaust port.

[0010] The fluorine pump cooling module also includes a fluorine pump, which is connected to a fluorine pump evaporator through an expansion valve, the fluorine pump is connected to a fluorine pump condenser, and the fluorine pump evaporator is connected to the fluorine pump condenser.

[0011] The compressor cooling module also includes a compressor, and the compressor is connected to a compressor evaporator and a compressor condenser respectively. The compressor evaporator and the compressor condenser are connected through an expansion valve.

[0012] A blower is arranged in the air supply port.

[0013] The beneficial effects of the present invention are:

[0014] 1. It can make full use of fluorine pump refrigeration, indirect evaporative cooling module, mechanical refrigeration, achieve efficient heat exchange, and use outdoor cold air to achieve free refrigeration.

[0015] 2. The spray cooling module uses outdoor fresh air to accelerate the evaporation and cooling of the water film in the water channel of the indirect evaporative heat exchanger, and then cools the hot return air in the air flow channel of the indirect evaporative heat exchanger. Only the exhaust fan is used, and the cooling effect is very significant, the energy consumption is low, and the cooling efficiency is high.

[0016] 3. If the fresh air temperature is too high, a fluorine pump cooling module can be used to cool the fresh air appropriately, and the energy consumption will not be too high, which increases the options for the refrigeration energy consumption gradient.

[0017] 4. The evaporators of the fluorine pump cooling module and the compressor cooling module are placed between the nozzle and the exhaust port. The fresh air with higher humidity after heat exchange is used to take away the heat dissipated by the evaporator, and the cooling capacity of the low-temperature fresh air after water film evaporation is used again to achieve the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an assembly view of the present invention.

[0019] In the figure: 1-fluorine pump cooling module, 2-spray cooling module, 3-compressor cooling module, 11-fluorine pump evaporator, 12-expansion valve, 13-fresh air inlet, 14-fluorine pump condenser, 21-water collection tank, 22-water pump, 23-indirect evaporative heat exchanger, 24-return air inlet, 25-nozzle, 26-exhaust outlet, 27-exhaust fan, 28-supply air outlet, 29-supply fan, 31-compressor, 32-compressor evaporator, 33-compressor condenser. DETAILED DESCRIPTION

[0020] In order to better understand the present invention, specific embodiments of the present invention are explained in detail below with reference to the accompanying drawings.

[0021] A data center cooling unit, comprising a fluorine pump cooling module 1, a spray cooling module 2, and a compressor cooling module 3, wherein the spray cooling module 2 comprises an indirect evaporative heat exchanger 23, a nozzle 25 for spraying water onto the indirect evaporative heat exchanger 23, a water pump 22 connected to the nozzle 25, and a water collection tank 21 for supplying water to the water pump 22, one end of an air flow channel of the indirect evaporative heat exchanger 23 is connected to a return air port 24, the other end of an air flow channel of the indirect evaporative heat exchanger 23 is connected to an air supply port 28, the lower part of a water spray channel of the indirect evaporative heat exchanger 23 is connected to a fresh air port 13, and the upper part of a water spray channel of the indirect evaporative heat exchanger 23 is connected to an exhaust port 26;

[0022] The spray cooling module 2 uses outdoor fresh air to accelerate the evaporation and cooling of the water film in the water spray channel of the indirect evaporative heat exchanger 23, and then cools the hot return air in the air flow channel of the indirect evaporative heat exchanger 23. Only the exhaust fan 27 is used, and the cooling effect is very significant, the energy consumption is low, and the cooling efficiency is high.

[0023] The fluorine pump evaporator 11 of the fluorine pump cooling module 1 is arranged at the fresh air inlet 13, and the compressor evaporator 32 of the compressor cooling module 3 is arranged at the air supply port 28. If the fresh air temperature is too high, the fluorine pump cooling module 1 can be used to appropriately cool the fresh air, and the energy consumption will not be too high, which increases the selection of the refrigeration energy consumption gradient.

[0024] The return air vent 24 is connected to the hot air duct after heat exchange in the data center, the supply air vent 28 is connected to the cooling air duct of the data center, and the fresh air vent 13 is connected to the outdoor air.

[0025] The nozzle 25 is disposed on the upper part of the water spraying channel of the indirect evaporative heat exchanger 23, and the nozzle 25 is installed on the water pipe connected to the water pump 22. The fluorine pump condenser 14 of the fluorine pump cooling module 1 and the compressor condenser 33 of the compressor cooling module 3 are both disposed between the nozzle 25 and the exhaust port 26, and the exhaust port 26 is provided with an exhaust fan 27.

[0026] The evaporators of the fluorine pump cooling module 1 and the compressor cooling module 3 are placed between the nozzle 25 and the exhaust port 26. The fresh air with higher humidity after heat exchange is used to take away the heat dissipated by the evaporator, and the cooling capacity of the low-temperature fresh air after water film evaporation is used again to achieve the purpose of energy saving.

[0027] The fluorine pump cooling module 1 further comprises a fluorine pump, which is connected to a fluorine pump evaporator 11 via an expansion valve 12 , and which is connected to a fluorine pump condenser 14 . The fluorine pump evaporator 11 is connected to the fluorine pump condenser 14 .

[0028] The compressor cooling module 3 further includes a compressor 31, and the compressor 31 is connected to a compressor evaporator 32 and a compressor condenser 33 respectively, and the compressor evaporator 32 and the compressor condenser 33 are connected via an expansion valve 12. A blower 29 is provided in the air supply port 28.

[0029] When the outdoor temperature Ta≥30℃, the fluorine pump cooling module 1, the spray cooling module 2, and the compressor cooling module 3 are turned on, and the indoor hot return air of the data center enters the unit at the return air port 24, first cools down in the indirect evaporative heat exchanger 23, and completes the return air treatment by supplementing the cooling capacity through the compressor evaporator 32; the cold air enters the data center through the air supply port 28 under the action of the blower 29, and cools down the IT equipment and the power distribution equipment; the cold air becomes high-temperature hot air after passing through the IT equipment and returns to the evaporative cooling unit through the return air port 24, and the cycle continues. The fresh air enters the unit through the fresh air port 13, and enters the indirect evaporative heat exchanger 23 after being cooled down by the fluorine pump evaporator 11. It evaporates under the action of water spray evaporation and efficiently exchanges heat with the air flow channel of the indirect evaporative heat exchanger 23. The wet air after the heat exchange is cooled down by the exhaust fan 27 for the fluorine pump condenser 14 and the compressor condenser 33, and then is discharged from the unit.

[0030] When the outdoor temperature is 20℃<Ta<30℃, the compressor cooling module 3 is turned off, and the return air directly enters the spray cooling module 2. After the spray cooling module 2 cools down, the cold air is output from the air supply port 28. After passing through the IT equipment, the cold air becomes high-temperature hot air and returns to the unit through the return air port 24, and the cycle continues. The fresh air enters the unit through the fresh air port 13, and enters the indirect evaporative heat exchanger 23 after being cooled by the fluorine pump evaporator in the fluorine pump cooling module 1. The evaporation under the action of water spray evaporation and the air flow channel of the indirect evaporative heat exchanger 23 are efficiently exchanged with heat. The wet air after the heat exchange is cooled by the exhaust fan 27 for cooling the fluorine pump condenser 14 and the compressor condenser 33, and then discharged from the unit.

[0031] When the outdoor temperature Ta≤20℃, turn off the compressor cooling module 3, turn off the fluorine pump cooling module 1, turn off the spray cooling module 2, and the return air will be cooled by heat exchange with the fresh air through the indirect evaporative heat exchanger 23. The cold air will be output from the air supply port 28. After passing through the IT equipment, the cold air will become high-temperature hot air and return to the evaporative cooling unit through the return air port 24, and the cycle will continue. The fresh air enters from the fresh air port 13, exchanges heat with the return air in the dry working condition through the indirect evaporative heat exchanger 23, and is discharged through the exhaust port 26;

[0032] The refrigeration system can make full use of fluorine pump refrigeration, spray cooling indirect evaporation, and mechanical refrigeration to achieve efficient heat exchange, and use outdoor cold air to achieve free refrigeration.

[0033] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A data center cooling unit, characterized in that: It includes a fluorine pump cooling module, a spray cooling module, and a compressor cooling module. The spray cooling module includes an indirect evaporative heat exchanger, a nozzle for spraying water onto the indirect evaporative heat exchanger, a water pump connected to the nozzle, and a water collection tank for supplying water to the water pump. One end of the air flow channel of the indirect evaporative heat exchanger is connected to the return air outlet, and the other end of the air flow channel of the indirect evaporative heat exchanger is connected to the air supply outlet. The lower part of the water spray channel of the indirect evaporative heat exchanger is connected to the fresh air outlet, and the upper part of the water spray channel of the indirect evaporative heat exchanger is connected to the exhaust outlet. The spray cooling module uses outdoor fresh air to accelerate the evaporation and cooling of the water film in the water channel of the indirect evaporative heat exchanger, and then cools the hot return air in the air flow channel of the indirect evaporative heat exchanger, and only uses the exhaust fan to work; The fluorine pump evaporator of the fluorine pump cooling module is arranged at the fresh air inlet, and the compressor evaporator of the compressor cooling module is arranged at the air supply outlet; if the fresh air temperature is too high, the fluorine pump cooling module is used to appropriately cool the fresh air; The return air vent is connected to the hot air duct after heat exchange in the data center, the air supply vent is connected to the cooling air duct of the data center, and the fresh air vent is connected to the outdoor air; The nozzle is arranged on the upper part of the water spraying channel of the indirect evaporative heat exchanger, and the nozzle is installed on the water pipe connected to the water pump; The fluorine pump condenser of the fluorine pump cooling module and the compressor condenser of the compressor cooling module are both arranged between the nozzle and the exhaust port, and an exhaust fan is arranged in the exhaust port; by placing the evaporators of the fluorine pump cooling module and the compressor cooling module between the nozzle and the exhaust port, the heat dissipated by the evaporator is taken away by the fresh air with high humidity after heat exchange, and the cooling capacity of the low-temperature fresh air after the evaporation of the water film is used again, so as to achieve the purpose of energy saving; When the outdoor temperature Ta≥30℃, turn on the fluorine pump cooling module, spray cooling module, and compressor cooling module. The indoor hot return air of the data center enters the unit at the return air inlet, and is first cooled in the indirect evaporative heat exchanger, and the return air treatment is completed by supplementing the cooling capacity through the compressor evaporator; the cold air enters the data center through the air supply port under the action of the blower to cool the IT equipment and power distribution equipment; the cold air becomes high-temperature hot air after passing through the IT equipment and returns to the evaporative cooling unit through the return air inlet; the fresh air enters the unit through the fresh air inlet, and enters the indirect evaporative heat exchanger after being cooled by the fluorine pump evaporator. Under the action of water spray evaporation, the evaporation and the air flow channel of the indirect evaporative heat exchanger are efficiently exchanged for heat. The humid air after the heat exchange is cooled by the exhaust fan for cooling the fluorine pump condenser and the compressor condenser, and then discharged from the unit; When the outdoor temperature is 20℃<Ta<30℃, the compressor cooling module is turned off, and the return air directly enters the spray cooling module. After the spray cooling module cools down, the cold air is output from the air supply port. After passing through the IT equipment, the cold air becomes high-temperature hot air and returns to the unit through the return air port. The fresh air enters the unit through the fresh air port, and after being cooled by the fluorine pump evaporator in the fluorine pump cooling module, it enters the indirect evaporative heat exchanger. Under the action of water spray evaporation, the evaporation and the air flow channel of the indirect evaporative heat exchanger are efficiently exchanged with each other. The wet air after the heat exchange is cooled by the exhaust fan for cooling the fluorine pump condenser and the compressor condenser, and then discharged from the unit. When the outdoor temperature Ta≤20℃, turn off the compressor cooling module, turn off the fluorine pump cooling module, turn off the spray cooling module, and the return air is cooled by the indirect evaporative heat exchanger and the fresh air. The cold air is output from the supply air outlet. After passing through the IT equipment, the cold air becomes high-temperature hot air and returns to the evaporative cooling unit through the return air outlet. The fresh air enters from the fresh air outlet, exchanges heat with the return air in the dry condition through the indirect evaporative heat exchanger, and is discharged through the exhaust outlet.

2. A data center cooling unit according to claim 1, characterized in that: The fluorine pump cooling module also includes a fluorine pump, which is connected to a fluorine pump evaporator through an expansion valve, the fluorine pump is connected to a fluorine pump condenser, and the fluorine pump evaporator is connected to the fluorine pump condenser.

3. A data center cooling unit according to claim 1, characterized in that: The compressor cooling module also includes a compressor, and the compressor is connected to a compressor evaporator and a compressor condenser respectively. The compressor evaporator and the compressor condenser are connected through an expansion valve.

4. A data center cooling unit according to claim 1, characterized in that: A blower is arranged in the air supply port.

Images