Anti-freezing indirect evaporation cooling tower suitable for data center

Abstract

The utility model discloses an anti-freezing indirect evaporative cooling tower suitable for a data center, which is characterized in that a direct evaporation filler is arranged in a case, a water tank is arranged below the direct evaporation filler, a first water outlet pipe is arranged at the bottom of the water tank, a spraying device is arranged above the direct evaporation filler, and a first water inlet pipe is communicated with the spraying device; a first surface type heat exchanger is arranged on the side face of the direct evaporation filler in the machine box, a second water inlet pipe is connected with a water inlet of the first surface type heat exchanger, a water outlet of the first surface type heat exchanger is connected with a second water outlet pipe, an air passing overhaul platform is arranged above the first surface type heat exchanger, and a switching air opening is formed above the spraying device. According to the utility model, the structure is reasonable, the investment cost of the refrigerating unit is reduced by arranging the movable switching door, different channels for air circulation are realized by moving the movable switching door to different positions, and the optimal operation energy consumption of the unit is synchronously realized when different operation states of the unit are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the air treatment equipment in the heating ventilation air conditioning field, especially a kind of indirect evaporative cooling tower suitable for data center freeze-proof. BACKGROUND

[0002] In the operation energy consumption of data center, refrigeration accounts for 20%-30% of operation energy consumption, so reducing the refrigeration energy consumption of data center can greatly reduce the PUE of data center. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of indirect evaporative cooling tower suitable for data center freeze-proof, its structure is reasonable, can be moved switch door by being set, reduce the input cost of refrigeration unit, by moving the different positions of movable switch door, realize the different passageways of air circulation, when meeting the different operating conditions of unit, synchronous realization optimal unit operating energy consumption.

[0004] The utility model aims at providing a kind of indirect evaporative cooling tower suitable for data center freeze-proof, its structure is reasonable, can be moved switch door by being set, reduce the input cost of refrigeration unit, by moving the different positions of movable switch door, realize the different passageways of air circulation, when meeting the different operating conditions of unit, synchronous realization optimal unit operating energy consumption.

[0005] The utility model structure is reasonable, realized by setting movable switch door, reduced the input cost of refrigeration unit, by moving the different positions of movable switch door, realized the different passageways of air circulation, when meeting the different operating conditions of unit, synchronous realization optimal unit operating energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0006] The utility model will be further described below in connection with the drawings, Figure 1 It is structure schematic view of the utility model embodiment 1, Figure 2 It is structure schematic view of the utility model embodiment 2, Figure 3 It is structure schematic view of the utility model embodiment 3, Figure 4 It is structure schematic view of the utility model embodiment 4. CONCRETE EMBODIMENT

[0007] A kind of indirect evaporative cooling tower suitable for data center freeze-proof,Figure 1 As shown, a direct evaporation packing 1 is installed inside the casing, a water tank 2 is installed below the direct evaporation packing 1, a first water outlet pipe 3 is installed at the bottom of the water tank 2, a spray device 4 is installed above the direct evaporation packing 1, a first water inlet pipe 5 is connected to the spray device 4, a first surface heat exchanger 6 is installed on the side of the direct evaporation packing 1 inside the casing, a second water inlet pipe 7 is connected to the water inlet of the first surface heat exchanger 6, a second water outlet pipe 8 is connected to the water outlet of the first surface heat exchanger 6, a ventilated maintenance platform 9 is installed above the first surface heat exchanger 6, a switching air vent 10 is installed above the spray device, a movable switching door 11 is installed on the side of the casing above the ventilated maintenance platform 9, an exhaust chamber 12 with an air outlet is installed on the casing, and an exhaust fan 13 is installed on the exhaust chamber 12.

[0008] Operating Mode 1: When the movable switching door 11 is not moved. After the outdoor fresh air exchanges heat with the refrigerant passing through the first surface heat exchanger 6, part of the heat-exchanged air passes through the direct evaporation packing 1 and is discharged by the exhaust fan 13; the other part of the heat-exchanged air passes through the air-accessible maintenance platform 9 and the switching air outlet 10 and is discharged by the exhaust fan 13. The refrigerant in the second water inlet pipe 7 enters the first surface heat exchanger 6, exchanges heat with the fresh air passing through the first surface heat exchanger 6, and then enters the second water outlet pipe 8. Operating Mode 2: When the movable switching door 11 is moved to the position of the switching air outlet 10. Part of the outdoor fresh air passes through the first surface heat exchanger 6, exchanges heat with the refrigerant passing through the first surface heat exchanger 6, mixes with the other part of the fresh air passing through the movable switching door, enters the direct evaporation packing 1, exchanges heat with the refrigerant passing through the direct evaporation packing 1, and is discharged by the exhaust fan 13. The refrigerant in the first inlet pipe 5 is sprayed by the spray device 4 into the direct evaporation packing 1, where it exchanges heat with the air passing through the packing 1 before falling into the water tank 2 and entering the first outlet pipe 3. The refrigerant in the second inlet pipe 7 enters the first surface heat exchanger 6, where it exchanges heat with the fresh air passing through the exchanger before entering the second outlet pipe 8. Different unit operating modes are achieved by moving the movable switching door 11, effectively reducing unit resistance and energy consumption under different operating modes; the movable switching door 11 also reduces unit costs. The refrigerant can be water or ethylene glycol, etc. The ventilated maintenance platform 9 can be a steel grating platform, etc., allowing for unit maintenance without obstructing airflow.

[0009] like Figure 2 As shown, a switching device 14 is installed at 9 locations on the wind-accessible maintenance platform.

[0010] Mode one: when the movable switch door 11 is not moved and the switch device 14 is opened. The outdoor fresh air exchanges heat with the refrigerant passing through the first surface heat exchanger 6, and part of the heat-exchanged air passes through the direct evaporation filler 1 and is discharged by the exhaust fan 13; the other part of the heat-exchanged air passes through the switch device 14, the air passing platform 9 and the switch air port 10 and is discharged by the exhaust fan 13. The refrigerant in the second water inlet pipe 7 enters the first surface heat exchanger 6, exchanges heat with the fresh air passing through the first surface heat exchanger 6, and then enters the second water outlet pipe 8. Mode two: when the switch device 14 is closed. The outdoor fresh air exchanges heat with the refrigerant passing through the first surface heat exchanger 6, and then enters the direct evaporation filler 1 and exchanges heat with the refrigerant passing through the direct evaporation filler 1 and is discharged by the exhaust fan 13. The refrigerant in the first water inlet pipe 5 falls into the direct evaporation filler 1 by the spraying device 4, exchanges heat with the air passing through the direct evaporation filler 1, and then falls into the water tank 2 and enters the first water outlet pipe 3. The refrigerant in the second water inlet pipe 7 enters the first surface heat exchanger 6, exchanges heat with the fresh air passing through the first surface heat exchanger 6, and then enters the second water outlet pipe 8. The addition of the switch device 14 can realize the addition of the indirect evaporation mode of the unit, reduce the temperature of the air entering the filler, make the temperature of the refrigerant taken by the unit lower, and improve the refrigeration effect of the unit.

[0011] As shown in Figure 3 The first surface heat exchanger 6 is arranged on one side of the cabinet wall in the cabinet, the second water inlet pipe 7 is connected to the water inlet of the first surface heat exchanger 6, the water outlet of the first surface heat exchanger 6 is communicated with the water inlet of the second surface heat exchanger 15 arranged obliquely, the first air inlet 16 is arranged on the second surface heat exchanger 15, the water outlet of the second surface heat exchanger 15 is connected to the second water outlet pipe 8, and the opening and closing device 17 is arranged between the first surface heat exchanger 6 and the second surface heat exchanger 15.

[0012] Running mode one: when the movable switch door 11 is not moved and the opening and closing device 17 is closed. Part of outdoor fresh air exchanges heat with refrigerant passing through the first surface heat exchanger 6, and then is discharged by the exhaust fan 13 after passing through the direct evaporative filler 1. Another part of outdoor fresh air exchanges heat with refrigerant passing through the second surface heat exchanger 15, and then is discharged by the exhaust fan 13 after passing through the movable switch door 9 and the switch air port 10. The refrigerant in the second water inlet pipe 7 enters the first surface heat exchanger 6, exchanges heat with fresh air passing through the first surface heat exchanger 6, and then enters the second surface heat exchanger 15, exchanges heat with fresh air passing through the second surface heat exchanger 15, and then enters the second water outlet pipe 8. Running mode two: when the movable switch door 11 is moved to the switch sealing position and the opening and closing device 17 is opened. Outdoor fresh air enters the direct evaporative filler 1 through the first surface heat exchanger 6 or the channel of the opening and closing device 17 when it is opened, respectively, exchanges heat with refrigerant passing through the direct evaporative filler 1, and is then discharged by the exhaust fan 13. The refrigerant in the first water inlet pipe 5 falls into the direct evaporative filler 1 by the spraying device 4, exchanges heat with air passing through the direct evaporative filler 1, and then falls into the water tank 2 and enters the first water outlet pipe 3. The surface heat exchanger is increased to two, which increases the heat exchange area of the surface heat exchanger and improves the refrigeration effect of the unit.

[0013] As Figure 4As shown, the first water outlet pipe 3 of the water tank 2 is communicated with the primary side inlet of the first plate heat exchanger 23 through the first circulating pump 18 and the first valve 19, the primary side outlet of the first plate heat exchanger 23 is communicated with the inlet of the condenser of the mechanical refrigeration unit 22 through the third valve 21 and the mechanical refrigeration unit 22, the outlet of the condenser of the mechanical refrigeration unit 22 is communicated with the spraying device 4 through the first water inlet pipe 5, the first bypass pipe is arranged between the primary side inlet and the primary side outlet of the first plate heat exchanger 23, the second valve 20 is arranged on the first bypass pipe, the second bypass pipe is arranged between the inlet of the condenser of the mechanical refrigeration unit 22 and the outlet of the condenser of the mechanical refrigeration unit 22, the fourth valve 24 is arranged on the second bypass pipe, the outlet of the evaporator of the mechanical refrigeration unit 22 is communicated with the inlet of the user 26 through the third circulating pump 25, the outlet of the user 26 is communicated with the secondary side inlet of the second plate heat exchanger 34 through the fifth valve 27, the secondary side outlet of the second plate heat exchanger 34 is communicated with the secondary side inlet of the first plate heat exchanger 23 through the seventh valve 33, the secondary side outlet of the first plate heat exchanger 23 is communicated with the inlet of the evaporator of the mechanical refrigeration unit 22 through the ninth valve 31, the third bypass pipe is arranged between the inlet of the evaporator of the mechanical refrigeration unit 22 and the outlet of the evaporator of the mechanical refrigeration unit 22, the tenth valve 28 is arranged on the third bypass pipe, the fourth bypass pipe is arranged between the secondary side inlet and the secondary side outlet of the first plate heat exchanger 23, the eighth valve 29 is arranged on the fourth bypass pipe, the fifth bypass pipe is arranged between the secondary side inlet and the secondary side outlet of the second plate heat exchanger 34, the sixth valve 30 is arranged on the fifth bypass pipe, the water outlet of the second surface heat exchanger 15 is communicated with the inlet of the primary side of the second plate heat exchanger 34, and the outlet of the primary side of the second plate heat exchanger 34 is communicated with the water inlet of the first surface heat exchanger 6 through the second circulating pump 32.

[0014] Operation mode one: when the movable switching door 11 is moved to the switching air port 10 position and the opening and closing device 17 is opened, the first valve 19, the third valve 21, the sixth valve 30, the seventh valve 33 and the ninth valve 31 are opened, and the second valve 20, the fourth valve 24, the fifth valve 27, the eighth valve 29 and the tenth valve 28 are closed. Outdoor fresh air enters the direct evaporation filler 1 through the first surface heat exchanger 6 or the channel of the opening and closing device 17 when it is opened, exchanges heat with the refrigerant passing through the direct evaporation filler 1, and is then discharged by the exhaust fan 13. The refrigerant in the water tank 2 enters the first plate heat exchanger 23 through the first circulating pump 18 and the first valve 19, exchanges heat with the refrigerant passing through the second side of the first plate heat exchanger 23, and then the water outlet enters the mechanical refrigeration unit 22 condenser through the third valve 21. After heat exchange, the water outlet enters the spraying device 4 and falls into the direct evaporation filler 1, exchanges heat with the air passing through the direct evaporation filler 1, and then falls into the water tank 2. The water outlet of the user 26 enters the second side of the first plate heat exchanger 23 through the sixth valve 30 and the seventh valve 33, exchanges heat after heat exchange, and then enters the mechanical refrigeration unit 22 evaporator through the ninth valve 31. After heat exchange, it enters the user 26 through the third circulating pump 25. Operation mode two: when the movable switching door 11 is moved to the switching air port 10 position and the opening and closing device 17 is opened, the second valve 20, the third valve 21, the sixth valve 30, the eighth valve 29 and the ninth valve 31 are opened, and the first valve 19, the fourth valve 24, the fifth valve 27, the seventh valve 33 and the tenth valve 28 are closed. Outdoor fresh air enters the direct evaporation filler 1 through the first surface heat exchanger 6 or the channel of the opening and closing device 17 when it is opened, exchanges heat with the refrigerant passing through the direct evaporation filler 1, and is then discharged by the exhaust fan 13. The refrigerant in the water tank 2 enters the mechanical refrigeration unit 22 condenser through the first circulating pump 18, the second valve 20 and the third valve 21, exchanges heat after heat exchange, and then the water outlet enters the spraying device 4 and falls into the direct evaporation filler 1, exchanges heat with the air passing through the direct evaporation filler 1, and then falls into the water tank 2. The water outlet of the user 26 enters the mechanical refrigeration unit 22 evaporator through the sixth valve 30, the eighth valve 29 and the ninth valve 31, exchanges heat after heat exchange, and then enters the user 26 through the third circulating pump 25. Operation mode three: when the movable switching door 11 is moved to the switching air port 10 position and the opening and closing device 17 is opened, the first valve 19, the fourth valve 24, the sixth valve 30, the seventh valve 33 and the tenth valve 28 are opened, and the second valve 20, the third valve 21, the fifth valve 27, the eighth valve 29 and the ninth valve 31 are closed. Outdoor fresh air enters the direct evaporation filler 1 through the first surface heat exchanger 6 or the channel of the opening and closing device 17 when it is opened, exchanges heat with the refrigerant passing through the direct evaporation filler 1, and is then discharged by the exhaust fan 13.The refrigerant in the water tank 2 enters the first plate heat exchanger 23 through the first circulating pump 18 and the first valve 19, exchanges heat with the refrigerant passing through the second side of the first plate heat exchanger 23, and then the water falls into the direct evaporation filler 1 through the fourth valve 24 and the spray device 4, exchanges heat with the air passing through the direct evaporation filler 1, and then falls into the water tank 2. The user 26 water falls into the second side of the first plate heat exchanger 23 through the sixth valve 30 and the seventh valve 33, exchanges heat, and then the water falls into the user 26 through the tenth valve 28 and the third circulating pump 25. Mode four: when the movable switching door 11 is not moved and the opening and closing device 17 is closed, the fifth valve 27, the eighth valve 29, and the tenth valve 28 are opened, and the first valve 19, the second valve 20, the third valve 21, the fourth valve 24, the sixth valve 30, the seventh valve 33, and the ninth valve 31 are closed. A part of the outdoor fresh air exchanges heat with the refrigerant passing through the first surface heat exchanger 6, passes through the direct evaporation filler 1, and is then discharged by the exhaust fan 13; another part of the outdoor fresh air exchanges heat with the refrigerant passing through the second surface heat exchanger 15, passes through the air inspection platform 9 and the switching air outlet 10, and is then discharged by the exhaust fan 13. The refrigerant in the second plate heat exchanger passes through the second circulating pump and enters the first surface heat exchanger 6, exchanges heat with the fresh air passing through the first surface heat exchanger 6, enters the second surface heat exchanger 15, exchanges heat with the fresh air passing through the second surface heat exchanger 15, and then enters the second plate heat exchanger for heat exchange. The user 26 water falls into the second side of the second plate heat exchanger through the fifth valve 27, exchanges heat, and then the water falls into the user 26 through the eighth valve 29, the tenth valve 28, and the third circulating pump 25.

Claims

1. An indirect evaporative cooling tower for data centers with anti-freeze properties, characterized in that: The cabinet is provided with direct evaporation filler (1), water tank (2) is arranged below direct evaporation filler (1), first water outlet pipe (3) is arranged at the bottom of water tank (2), spraying device (4) is arranged above direct evaporation filler (1), first water inlet pipe (5) and spraying device (4) are communicated, first surface heat exchanger (6) is arranged on the side of direct evaporation filler (1) in the cabinet, second water inlet pipe (7) is connected with the water inlet of first surface heat exchanger (6), the water outlet of first surface heat exchanger (6) is connected with second water outlet pipe (8), movable wind inspection platform (9) is arranged above first surface heat exchanger (6), switching air port (10) is arranged above spraying device, movable switching door (11) is arranged on the side of cabinet above movable wind inspection platform (9), exhaust chamber (12) with air outlet is arranged on the cabinet, exhaust fan (13) is installed on exhaust chamber (12).

2. The indirect evaporative cooling tower of claim 1, wherein: Switching device (14) is arranged at movable wind inspection platform (9).

3. The indirect evaporative cooling tower of claim 1, wherein the indirect evaporative cooling tower is a freeze protection indirect evaporative cooling tower. First surface heat exchanger (6) is arranged on the wall of one side of cabinet, second water inlet pipe (7) is connected with the water inlet of first surface heat exchanger (6), the water outlet of first surface heat exchanger (6) is communicated with the water inlet of second surface heat exchanger (15) arranged in an inclined manner, first air inlet (16) is arranged on second surface heat exchanger (15), the water outlet of second surface heat exchanger (15) is connected with second water outlet pipe (8), opening and closing device (17) is arranged between first surface heat exchanger (6) and second surface heat exchanger (15).

4. The indirect evaporative cooling tower of claim 3, wherein: The first water outlet pipe (3) of the water tank (2) is communicated with the primary side inlet of the first plate heat exchanger (23) through the first circulating pump (18) and the first valve (19), the primary side outlet of the first plate heat exchanger (23) is communicated with the inlet of the condenser of the mechanical refrigeration unit (22) through the third valve (21) and the mechanical refrigeration unit (22), the outlet of the condenser of the mechanical refrigeration unit (22) is communicated with the spraying device (4) through the first water inlet pipe (5), the first bypass pipe is arranged between the primary side inlet and the primary side outlet of the first plate heat exchanger (23), the second valve (20) is arranged on the first bypass pipe, the second bypass pipe is arranged between the inlet of the condenser of the mechanical refrigeration unit (22) and the outlet of the condenser of the mechanical refrigeration unit (22), the fourth valve (24) is arranged on the second bypass pipe, the outlet of the evaporator of the mechanical refrigeration unit (22) is communicated with the inlet of the user (26) through the third circulating pump (25), the outlet of the user (26) is communicated with the secondary side inlet of the second plate heat exchanger (34) through the fifth valve (27), the secondary side outlet of the second plate heat exchanger (34) is communicated with the secondary side inlet of the first plate heat exchanger (23) through the seventh valve (33), the secondary side outlet of the first plate heat exchanger (23) is communicated with the inlet of the evaporator of the mechanical refrigeration unit (22) through the ninth valve (31), the inlet of the evaporator of the mechanical refrigeration unit (22) and the outlet of the evaporator of the mechanical refrigeration unit (22) are communicated through the third bypass pipe, the tenth valve (28) is arranged on the third bypass pipe, the fourth bypass pipe is arranged between the secondary side inlet and the secondary side outlet of the first plate heat exchanger (23), the eighth valve (29) is arranged on the fourth bypass pipe, the fifth bypass pipe is arranged between the secondary side inlet and the secondary side outlet of the second plate heat exchanger (34), the sixth valve (30) is arranged on the fifth bypass pipe, the water outlet of the second surface heat exchanger (15) is communicated with the inlet of the primary side of the second plate heat exchanger (34), and the outlet of the primary side of the second plate heat exchanger (34) is communicated with the water inlet of the first surface heat exchanger (6) through the second circulating pump (32).

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