Large-temperature-difference air conditioning system suitable for liquid cooling data center

Abstract

The utility model discloses a large temperature difference air conditioning system suitable for a liquid cooling data center, which is characterized in that a first circulating pump is arranged on a water outlet pipe of an evaporative cooling unit, an outlet of the first circulating pump is communicated with a primary side inlet of a plate heat exchanger, and a second valve is arranged at the primary side inlet of the plate heat exchanger; a primary side outlet of the plate heat exchanger is communicated with an inlet of a condenser of the mechanical refrigerating unit through a pipeline, an outlet of the condenser of the mechanical refrigerating unit is communicated with a primary side inlet of the liquid cooling plate heat exchanger through a pipeline, and a primary side outlet pipe of the liquid cooling plate heat exchanger is connected with a water inlet of the evaporative cooling unit. A bypass pipe is arranged between a primary side inlet and a primary side outlet of the plate heat exchanger, and a first valve is arranged on the bypass pipe. The liquid cooling capacity distribution device is reasonable in structure, cold supply of the precise air conditioner tail end and the liquid cooling capacity distribution device is achieved at the same time through different system pipeline modes, cost is saved, capital investment is saved, and operation energy consumption of a refrigerating system is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the air treatment equipment in the field of heating ventilation air conditioner, especially a kind of liquid cooling data center big temperature difference air conditioning system suitable for. BACKGROUND

[0002] At present, data center starts to adopt liquid cooling technology, but liquid cooling technology application is not used in data center comprehensively.Most data centers use precision air conditioning terminal and liquid cooling technology simultaneously.In this form, part of computer room uses precision air conditioning terminal cooling, and part of computer room uses liquid cooling cooling capacity distribution device cooling.This increases the demand for cold source, and if precision air conditioning terminal and liquid cooling cooling capacity distribution device are provided with cold source respectively, it is equivalent to increasing the cold source area and the input of cold source. SUMMARY

[0003] The utility model discloses a kind of liquid cooling data center big temperature difference air conditioning systems suitable for, its structure is reasonable, using different system pipeline form reaches simultaneously satisfy for precision air conditioning terminal in liquid cooling cooling capacity distribution device cooling, save cost, save capital investment, reduce refrigeration system operating energy consumption.

[0004] The utility model discloses a kind of liquid cooling data center big temperature difference air conditioning systems suitable for, the outlet pipe of evaporative cooling unit is provided with first circulating pump, the outlet of first circulating pump and the import of plate heat exchanger primary side are communicated, second valve is provided in the import of plate heat exchanger primary side, the outlet of plate heat exchanger primary side is communicated with the import of mechanical refrigeration unit condenser by pipeline, the outlet of mechanical refrigeration unit condenser is communicated with the import of liquid cooling plate heat exchanger primary side by pipeline, the inlet of evaporative cooling unit is connected with the outlet pipe of liquid cooling plate heat exchanger primary side;Bypass pipe is provided between the import and the outlet of plate heat exchanger primary side, first valve is provided on bypass pipe, the outlet pipe of mechanical refrigeration unit evaporator is connected with the import of precision air conditioning terminal by second circulating pump, the outlet pipe of precision air conditioning terminal is connected with the import of plate heat exchanger secondary side, the import of mechanical refrigeration unit evaporator is connected with the outlet pipe of plate heat exchanger secondary side, the import of liquid cooling cooling capacity distribution device is connected with the outlet pipe of liquid cooling plate heat exchanger secondary side by third circulating pump, the outlet pipe of liquid cooling cooling capacity distribution device is connected with the import of liquid cooling plate heat exchanger secondary side.

[0005] The utility model discloses a kind of liquid cooling data center big temperature difference air conditioning systems suitable for, its structure is reasonable, using different system pipeline form reaches simultaneously satisfy for precision air conditioning terminal in liquid cooling cooling capacity distribution device cooling, save cost, save capital investment, reduce refrigeration system operating energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0006] The utility model will be further described in connection with the drawings,Figure 1 Embodiment 1 of the utility model structural schematic diagram, Figure 2 Embodiment 2 of the utility model structural schematic diagram. Specific embodiments

[0007] A kind of be applicable to liquid cooling data center big temperature difference air conditioning system, such as Figure 1 As shown, the outlet pipe of evaporative cooling unit 1 is provided with first circulating pump 2, the outlet of first circulating pump 2 and the inlet of primary side of plate heat exchanger 4 are communicated, second valve 3 is provided in the inlet of primary side of plate heat exchanger 4, the outlet of primary side of plate heat exchanger 4 is communicated with the inlet of condenser of mechanical refrigeration unit 6 by pipeline, the outlet of condenser of mechanical refrigeration unit 6 is communicated with the inlet of primary side of liquid cooling plate heat exchanger 7 by pipeline, the outlet pipe of primary side of liquid cooling plate heat exchanger 7 is connected with the water inlet of evaporative cooling unit 1;Bypass pipe is provided between the inlet and outlet of primary side of plate heat exchanger 4, first valve 5 is provided on bypass pipe, the outlet pipe of evaporator of mechanical refrigeration unit 6 is connected with the inlet of precision air conditioning terminal 9 by second circulating pump 8, the outlet pipe of precision air conditioning terminal 9 is connected with the inlet of secondary side of plate heat exchanger 4, the inlet pipe of evaporator of mechanical refrigeration unit 6 is connected with the outlet pipe of secondary side of plate heat exchanger 4, the outlet pipe of secondary side of liquid cooling plate heat exchanger 7 is connected with the inlet of liquid cooling cold quantity distribution device 11 by third circulating pump 10, the outlet pipe of liquid cooling cold quantity distribution device 11 is connected with the inlet of secondary side of liquid cooling plate heat exchanger 7.

[0008] Operating Mode 1: First valve 5 is closed, second valve 3 is open. Water from the evaporative cooling unit 1 flows through the first circulation pump 2 and the second valve 3 into the primary side of the plate heat exchanger 4 for heat exchange. After heat exchange, the water from the primary side of the plate heat exchanger 4 flows into the condenser of the mechanical refrigeration unit 6. After heat exchange, the water from the condenser of the mechanical refrigeration unit 6 flows into the primary side of the liquid-cooled plate heat exchanger 4. After heat exchange, the water from the primary side of the liquid-cooled plate heat exchanger 4 returns to the evaporative cooling unit 1. Water from the evaporator of the mechanical refrigeration unit 6 flows through the second circulation pump 8 into the precision air conditioning terminal 9 for heat exchange. Water from the precision air conditioning terminal 9 returns to the secondary side of the plate heat exchanger 4. After heat exchange, the water from the secondary side of the plate heat exchanger 4 flows into the evaporator of the mechanical refrigeration unit 6 for heat exchange. Water from the secondary side of the liquid-cooled plate heat exchanger 4 flows through the third circulation pump 10 into the liquid-cooled cooling capacity distribution device 11. After heat exchange, the water from the liquid-cooled cooling capacity distribution device 11 returns to the secondary side of the liquid-cooled plate heat exchanger 4. Operating Mode 2: First valve 5 is open, second valve 3 is closed. Water from the evaporative cooling unit 1 enters the condenser of the mechanical refrigeration unit 6 via the first circulation pump 2 and the first valve 5. After heat exchange, the water from the condenser of the mechanical refrigeration unit 6 enters the primary side of the liquid-cooled plate heat exchanger 4. After heat exchange, the water from the primary side of the liquid-cooled plate heat exchanger 4 returns to the evaporative cooling unit 1. Water from the evaporator of the mechanical refrigeration unit 6 enters the precision air conditioning terminal 9 via the second circulation pump 8 for heat exchange. Water from the precision air conditioning terminal 9 enters the evaporator of the mechanical refrigeration unit 6 via the secondary side of the plate heat exchanger 4 for heat exchange. Water from the secondary side of the liquid-cooled plate heat exchanger 4 enters the liquid-cooled cooling capacity distribution device 11 via the third circulation pump 10. After heat exchange, the water from the liquid-cooled cooling capacity distribution device 11 returns to the secondary side of the liquid-cooled plate heat exchanger 4. Two operating modes can be achieved through the first valve 5 and the second valve 3. When the water outlet of the evaporative cooling unit 1 passes through the second valve 3 and the first valve 5 is closed, the water outlet of the evaporative cooling unit 1 is used for cascade cooling, reducing the energy consumption of the system. When the water outlet temperature of the evaporative cooling unit 1 is higher than the water entering the secondary side of the plate heat exchanger 4, the second valve 3 can be closed, and the water outlet of the evaporative cooling unit 1 will not exchange heat with the secondary side of the plate heat exchanger 4, thus avoiding heat loss.

[0009] like Figure 2 As shown, a third valve 12 is installed at the condenser inlet of the mechanical refrigeration unit 6, and a bypass pipe is installed between the condenser inlet and outlet pipes of the mechanical refrigeration unit 6, with a fourth valve 13 installed on the bypass pipe; a fifth valve 14 is installed at the secondary side inlet of the plate heat exchanger 4, and a bypass pipe is installed between the secondary side inlet and outlet of the plate heat exchanger 4, with a sixth valve 15 installed on the bypass pipe.

[0010] Operation mode one: the second valve 3, the third valve 12, the fifth valve 14 are opened, and the first valve 5, the fourth valve 13, the sixth valve 15 are closed. The water outlet of the evaporative cooling unit 1 enters the plate heat exchanger 4 primary side heat exchange through the first circulating pump 2 and the second valve 3, and the water outlet of the plate heat exchanger 4 primary side heat exchange enters the mechanical refrigeration unit 6 condenser through the third valve 12, and the water outlet of the mechanical refrigeration unit 6 condenser enters the liquid cooling plate heat exchanger 4 primary side heat exchange, and the water outlet of the liquid cooling plate heat exchanger 4 primary side heat exchange returns to the evaporative cooling unit 1; the water outlet of the mechanical refrigeration evaporator enters the precision air conditioning terminal 9 heat exchange through the second circulating pump 8, and the water outlet of the precision air conditioning terminal 9 enters the plate heat exchanger 4 secondary side heat exchange through the fifth valve 14, and the water outlet of the plate heat exchanger 4 secondary side heat exchange enters the mechanical refrigeration unit 6 evaporator heat exchange; the water outlet of the liquid cooling plate heat exchanger 4 secondary side heat exchange enters the liquid cooling capacity distribution device 11 through the third circulating pump 10, and the water outlet of the liquid cooling capacity distribution device 11 returns to the liquid cooling plate heat exchanger 4 secondary side heat exchange. Operation mode two: the second valve 3, the fourth valve 13, the fifth valve 14 are closed, and the first valve 5, the third valve 12, the sixth valve 15 are opened. The water outlet of the evaporative cooling unit 1 enters the mechanical refrigeration unit 6 condenser through the first circulating pump 2 and the first valve 5 and the third valve 12, and the water outlet of the mechanical refrigeration unit 6 condenser enters the liquid cooling plate heat exchanger 4 primary side heat exchange, and the water outlet of the liquid cooling plate heat exchanger 4 primary side heat exchange returns to the evaporative cooling unit 1; the water outlet of the mechanical refrigeration unit 6 evaporator enters the precision air conditioning terminal 9 heat exchange through the second circulating pump 8, and the water outlet of the precision air conditioning terminal 9 enters the mechanical refrigeration unit 6 evaporator heat exchange through the sixth valve 15; the water outlet of the liquid cooling plate heat exchanger 4 secondary side heat exchange enters the liquid cooling capacity distribution device 11 through the third circulating pump 10, and the water outlet of the liquid cooling capacity distribution device 11 returns to the liquid cooling plate heat exchanger 4 secondary side heat exchange. Operation mode three: the second valve 3, the fourth valve 13, the fifth valve 14 are opened, and the first valve 5, the third valve 12, the sixth valve 15 are closed. The water outlet of the evaporative cooling unit 1 enters the plate heat exchanger 4 primary side heat exchange through the first circulating pump 2 and the second valve 3, and the water outlet of the plate heat exchanger 4 primary side heat exchange enters the liquid cooling plate heat exchanger 4 primary side heat exchange through the fourth valve 13, and the water outlet of the liquid cooling plate heat exchanger 4 primary side heat exchange returns to the evaporative cooling unit 1; the water outlet of the mechanical refrigeration unit 6 evaporator enters the precision air conditioning terminal 9 heat exchange through the second circulating pump 8, and the water outlet of the precision air conditioning terminal 9 enters the plate heat exchanger 4 secondary side heat exchange through the fifth valve 14, and the water outlet of the plate heat exchanger 4 secondary side heat exchange enters the mechanical refrigeration unit 6 evaporator; the water outlet of the liquid cooling plate heat exchanger 4 secondary side heat exchange enters the liquid cooling capacity distribution device 11 through the third circulating pump 10, and the water outlet of the liquid cooling capacity distribution device 11 returns to the liquid cooling plate heat exchanger 4 secondary side heat exchange.The third valve 12, the fourth valve 13, the fifth valve 14 and the sixth valve 15 are added, three operation modes of the system can be realized, when the cold quantity of the evaporative cooling unit 1 meets the precise air conditioning terminal 9 and the liquid cooling cold quantity distribution device 11, the system water can not pass through the condenser side of the mechanical refrigerating unit 6, the operation energy consumption is reduced; when the cold quantity of the evaporative cooling unit 1 cannot completely meet the precise air conditioning terminal 9 and the liquid cooling cold quantity distribution device 11, the system can realize the step application of the cold quantity, the operation energy consumption is reduced; when the cold quantity of the evaporative cooling unit 1 cannot meet the precise air conditioning terminal 9 and the liquid cooling cold quantity distribution device 11, the system water can realize not passing through the plate heat exchanger 4, the operation energy consumption is reduced.

[0011] The evaporative cooling unit 1 is an indirect evaporative cooling unit.

Claims

1. A large temperature difference air conditioning system suitable for liquid-cooled data centers, characterized by: A first circulation pump (2) is installed on the outlet pipe of the evaporative cooling unit (1). The outlet of the first circulation pump (2) is connected to the primary side inlet of the plate heat exchanger (4). A second valve (3) is installed at the primary side inlet of the plate heat exchanger (4). The primary side outlet of the plate heat exchanger (4) is connected to the inlet of the condenser of the mechanical refrigeration unit (6) through a pipeline. The outlet of the condenser of the mechanical refrigeration unit (6) is connected to the primary side inlet of the liquid-cooled plate heat exchanger (7) through a pipeline. The primary side outlet pipe of the liquid-cooled plate heat exchanger (7) is connected to the inlet of the evaporative cooling unit (1). A valve is installed between the primary side inlet and outlet of the plate heat exchanger (4). A bypass pipe is provided, and a first valve (5) is installed on the bypass pipe. The outlet pipe of the evaporator of the mechanical refrigeration unit (6) is connected to the inlet of the precision air conditioning terminal (9) through the second circulation pump (8). The outlet pipe of the precision air conditioning terminal (9) is connected to the inlet of the secondary side of the plate heat exchanger (4). The outlet pipe of the secondary side of the plate heat exchanger (4) is connected to the inlet of the evaporator of the mechanical refrigeration unit (6). The outlet pipe of the secondary side of the liquid-cooled plate heat exchanger (7) is connected to the inlet of the liquid-cooled cooling capacity distribution device (11) through the third circulation pump (10). The outlet pipe of the liquid-cooled cooling capacity distribution device (11) is connected to the secondary side inlet of the liquid-cooled plate heat exchanger (7).

2. The air conditioning system for large temperature difference in liquid-cooled data centers according to claim 1, characterized in that: A third valve (12) is installed at the condenser inlet of the mechanical refrigeration unit (6), and a bypass pipe is installed between the condenser inlet and outlet pipes of the mechanical refrigeration unit (6), and a fourth valve (13) is installed on the bypass pipe; a fifth valve (14) is installed at the secondary side inlet of the plate heat exchanger (4), and a bypass pipe is installed between the secondary side inlet and outlet of the plate heat exchanger (4), and a sixth valve (15) is installed on the bypass pipe.

3. A large temperature difference air conditioning system for liquid-cooled data centers according to claim 1, characterized in that: The evaporative cooling unit (1) is an indirect evaporative cooling unit.

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