CN211792609U - Indirect evaporative cooling air conditioning unit for data center - Google Patents

Abstract

The utility model discloses an indirect evaporative cooling air conditioning unit for a data center, which comprises a unit shell, wherein a primary air inlet and a primary air supply outlet are respectively arranged on two opposite side walls of the unit shell, and an air filter a, an indirect evaporative cooling section, an evaporator combined unit, a humidifying section, a water baffle b and a primary air blower are sequentially arranged in the unit shell according to the flowing direction after primary air enters; a secondary air outlet is arranged on the unit shell, and secondary air inlets are arranged on the side walls of the unit shell; a secondary air exhaust fan is arranged at the secondary air exhaust outlet, and a condenser combination unit is arranged between the secondary air exhaust fan and the indirect evaporative cooling section; also comprises an expansion valve and a compressor; the device also comprises a control unit which is respectively connected with the indirect evaporation cooling section, the evaporator combined unit, the humidifying section, the condenser combined unit and the primary air blower. The air conditioning unit can greatly reduce the energy consumption of the data center.

Description

A kind of indirect evaporative cooling air conditioning unit for data center

technical field

The utility model belongs to the technical field of air conditioning system equipment, in particular to an indirect evaporative cooling air conditioning unit for data centers.

Background technique

With the development of society, the amount of data information is growing rapidly, and the density of data centers is also getting higher and higher. In the past, data centers had a decentralized and miniaturized layout. In the future, with the rise of big data and cloud computing, there will be more and more large data centers, and the heat density of a single cabinet in the data processing room will also increase. For the normal operation of the equipment in the data processing room, the equipment room needs to be cooled to meet the operating temperature and humidity requirements of the equipment. However, the cooling method of the traditional data processing room is mechanical compression refrigeration, and it needs to be cooled throughout the year. Therefore, the air conditioning system of the data center consumes a lot of energy, which is not in line with the sustainable development of energy conservation and emission reduction in my country.

In view of such high energy consumption of data centers, relevant data center design specifications have increased the supply air temperature of data processing equipment rooms, which provides favorable conditions for the application of evaporative cooling technology. Evaporative cooling technology uses water as the cooling medium, which is both economical and environmentally friendly. At present, indirect evaporative cooling technology has been widely promoted and applied in data centers. The use of indirect evaporative cooling technology can not only ensure the cooling requirements for the data processing room, but also ensure the air cleanliness of the computer room, and at the same time maximize the use of natural cooling technology , reducing the running time of traditional mechanical refrigeration and air conditioning, greatly reducing the energy consumption of the data center.

However, in the indirect evaporative cooling air-conditioning unit currently used in the data center, the evaporator and condenser of the mechanical refrigeration module account for a large resistance in the whole indirect evaporative cooling air-conditioning unit, which additionally increases the energy consumption of the unit's transmission and distribution system, and has a negative impact on the The humidity control in the data processing room is not precise enough.

Utility model content

The purpose of this utility model is to provide an indirect evaporative cooling air-conditioning unit for data center, which can reduce the resistance of the unit by adopting a reasonable structure of the unit, at the same time realize a more accurate humidification effect of the unit, improve the energy efficiency of the whole unit, and then greatly reduce the cost of the data center. energy consumption.

The technical scheme adopted by the utility model is that an indirect evaporative cooling air-conditioning unit for a data center includes a unit casing, and a primary air inlet and a primary air supply outlet are respectively provided on the opposite side walls of the unit casing. In the body, according to the flow direction of the primary air after entering, the air filter a, the indirect evaporative cooling section, the evaporator combination unit, the humidification section, the water baffle b and the primary air blower are arranged in sequence; the unit shell corresponding to the top of the indirect evaporative cooling section A secondary air outlet is arranged on the upper part, and secondary air inlets are arranged on both side walls of the unit shell corresponding to the two opposite sides of the indirect evaporative cooling section; a secondary air exhaust fan is arranged at the secondary air outlet. , a condenser combination unit is arranged between the secondary air exhaust fan and the indirect evaporative cooling section; it also includes an expansion valve and a compressor, and the condenser combination unit, expansion valve, evaporator combination unit and compressor are sequentially connected by refrigerant pipes. A closed loop is formed; a control unit is arranged below the primary air blower, and the control unit is respectively connected with the indirect evaporative cooling section, the evaporator combination unit, the humidification section, the condenser combination unit, the secondary air exhaust fan and the primary air supply fan.

The utility model is also characterized in that,

An air filter b is arranged at the air inlet of the secondary air.

The indirect evaporative cooling section includes a water baffle a, a water distributor, an indirect evaporative cooling heat exchange core and a water collecting tank b, which are arranged in sequence from top to bottom. The water distributor is connected to the water collecting tank b through a water pipe b; the secondary air inlet It is located on the side wall of the unit shell corresponding to the indirect evaporative cooling heat exchange core and the water collecting tank b; the water pipe b is provided with a water pump b, and the water pump b is connected to the control unit.

The indirect evaporative cooling heat exchange core is composed of a plate-fin round tube, a horizontal round tube or a vertical round tube.

The evaporator combination unit includes two evaporators arranged in a "V" shape and in parallel, and an electric air valve b is arranged between the two evaporators; the condenser combination unit includes two condensers arranged in a "V" shape and connected in parallel , an electric air valve a is set between the two condensers, the two parallel condensers, the compressor, the two parallel evaporators and the expansion valve are connected in turn through the refrigerant pipe to form a closed loop; the electric air valve b and the electric air valve a are respectively connected with the control unit.

The humidification section includes a high-pressure spray water distributor vertically arranged in the casing of the unit. The nozzle direction of the high-pressure spray water distributor faces the water baffle b. A water collecting tank a is arranged below the high-pressure spray water distributor, and the high-pressure spray water distributor passes through the water pipe. a is connected to the water collecting tank a, the water pipe a is also provided with a water pump a, and the water pump a is connected to the control unit.

The secondary air exhaust fan is an axial flow fan.

The primary air blower is a centrifugal fan.

The beneficial effects of the present utility model are:

(1) An indirect evaporative cooling air-conditioning unit for a data center of the present invention, the air valves of the condenser combined unit and the evaporator combined unit are electric, and the opening of the electric air valve can be controlled by switching the operation mode according to the change of outdoor weather parameters. or closed, this design can reduce the resistance of the primary blower and the secondary exhaust fan, reduce the energy consumption of the air conditioning unit, make the system efficient and energy-saving, and also protect the condenser and evaporator to prevent damage caused by long-term flushing .

(2) An indirect evaporative cooling air-conditioning unit for a data center of the present invention, the indirect evaporative cooling heat exchange core body in the indirect evaporative cooling section can be disassembled and replaced, such as plate-fin type, horizontal round tube and vertical round tube. It can be replaced according to the needs of actual working conditions, so that it can be applied to more practical projects and make the use range of the unit wider and more flexible.

(3) An indirect evaporative cooling air-conditioning unit for a data center of the present invention, the humidification device adopts a high-pressure spray humidification method, which avoids the delay and secondary pollution of wet film humidification, and has better precise control than wet film humidification. And set up a baffle to prevent water droplets from entering the data processing room and causing damage to the server.

(4) An indirect evaporative cooling air-conditioning unit for data centers of the present invention utilizes the principle of indirect evaporative cooling to ensure that the temperature and humidity range of the computer room is not mixed with the outside air, thereby ensuring the air quality requirements of the computer room, and to the maximum extent possible. The use of natural cold source cooling reduces the running time of traditional mechanical refrigeration and air conditioning, which is economical and environmentally friendly.

(5) An indirect evaporative cooling air conditioner unit for data centers of the present invention can switch modes according to actual meteorological parameters, so that it can operate in an energy-saving working condition throughout the year, reducing the energy consumption of the air conditioner unit, and achieving For the purpose of energy saving and emission reduction of data center.

Description of drawings

FIG. 1 is a schematic structural diagram of an indirect evaporative cooling air-conditioning unit used in a data center of the present invention.

In the figure, 1. Primary air inlet, 2. Air filter a, 3. Indirect evaporative cooling heat exchange core, 4. Water distributor, 5. Water baffle a, 6. Condenser, 7. Electric air valve a, 8. Secondary air exhaust fan, 9. Secondary air exhaust port, 10. Expansion valve, 11. Evaporator, 12. Electric air valve b, 13. High pressure spray water distributor, 14. Water baffle b , 15. Primary air supply fan, 16. Primary air supply port, 17. Control unit, 18. Water collecting tank a, 19. Water pipe a, 20. Water pump a, 21. Compressor, 22. Refrigerant pipe, 23. Water pump b , 24. Water pipe b, 25. Water collection tank b, 26. Air filter b, 27. Secondary air inlet.

Detailed ways

The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

The utility model is an indirect evaporative cooling air conditioning unit for a data center, as shown in FIG. 1 , comprising an organic unit casing. The opposite side walls of the unit casing are respectively provided with a primary air inlet 1 and a primary air supply outlet 16. In the casing, according to the flow direction of the primary air after entering, an air filter a2, an indirect evaporative cooling section, an evaporator combination unit, a humidification section, a water baffle b14 and a primary air blower 15 are arranged in sequence; the unit corresponding to the top of the indirect evaporative cooling section The casing is provided with a secondary air outlet 9, and the two side walls of the unit casing corresponding to the two opposite sides of the indirect evaporative cooling section are provided with secondary air inlets 27; The secondary air exhaust fan 8, a condenser combination unit is arranged between the secondary air exhaust fan 8 and the indirect evaporative cooling section; it also includes an expansion valve 10 and a compressor 21, a condenser combination unit, an expansion valve 10, and an evaporator combination. The unit and the compressor 21 are sequentially connected through the refrigerant pipe 22 to form a closed loop; a control unit 17 is arranged below the primary air blower 15, and the control unit 17 is respectively connected with the indirect evaporative cooling section, the evaporator combination unit, the humidification section, and the condenser combination unit. , the secondary air exhaust fan 8 and the primary air blower 15 are connected.

An air filter b26 is provided at the secondary air inlet 27 .

The indirect evaporative cooling section includes a water baffle a5, a water distributor 4, an indirect evaporative cooling heat exchange core 3 and a water collection tank b25, which are arranged in sequence from top to bottom, and the water distributor 4 is connected to the water collection tank b25 through a water pipe b24; The air inlet 27 is located on the side wall of the unit casing corresponding between the indirect evaporative cooling heat exchange core 3 and the water collecting tank b25 ;

The indirect evaporative cooling heat exchange core 3 is composed of one of plate-fin circular tubes, horizontal circular tubes or vertical circular tubes, which can be replaced according to the actual working conditions; The air goes through the wet passage and conducts heat exchange through the indirect evaporative cooling heat exchange core 3;

The evaporator combination unit includes two evaporators 11 arranged in a "V" shape and connected in parallel, an electric damper b12 is arranged between the two evaporators 11, and the electric damper b12 controls the primary air passing through the evaporator 11; the condenser The combined unit includes two condensers 6 arranged in a "V" shape and in parallel, an electric air valve a7 is arranged between the two condensers 6, and the electric air valve a7 is used to control the secondary air passing through the condenser 6, and the condenser 6 is in the form of air cooling; the two parallel condensers 6, the compressor 21, the two parallel evaporators 11 and the expansion valve 10 are connected in turn through the refrigerant pipe 22 to form a closed loop; the electric air valve b12 and the electric air The valves a7 are respectively connected to the control unit 17 .

The two condensers 6 and the evaporator 11 are connected in parallel respectively. When one of them fails, the safe and reliable operation of the unit can be ensured; The switching of the operating mode is turned on or off;

The humidification section includes a high-pressure spray water distributor 13 vertically arranged in the unit casing. The nozzle direction of the high-pressure spray water distributor 13 faces the water blocking plate b14. Below the high-pressure spray water distributor 13, a water collection tank a18 is arranged, and the high-pressure spray water distributor 13 is provided. The device 13 is connected to the water collecting tank a18 through a water pipe a19 , a water pump a20 is also provided on the water pipe a19 , and the water pump a20 is connected to the control unit 17 .

The secondary air exhaust fan 8 is an axial flow fan.

The primary air blower 15 is a centrifugal fan.

The utility model is an indirect evaporative cooling air-conditioning unit for a data center, and the working process is as follows:

According to the working process of the primary air in the data processing room: the indoor return air is purified and filtered from the primary air inlet 1 through the air filter a2, and then flows through the dry channel of the indirect evaporative cooling heat exchange core 3, and the indoor return air transfers heat to the The secondary air on the side of the wet passage, the primary air of the indoor return air is cooled and cooled, and then passes through the evaporator 11 for secondary cooling and cooling, and finally humidifies in the humidification section, and then passes through the power provided by the primary air blower 15 to finally cool and humidify the air. The primary air is sent into the data processing computer room from the primary air supply port 16, and the primary air forms a circulation in this way, so as to achieve the cooling effect on the data processing computer room.

According to the working process of the outdoor secondary air: after the outdoor air is purified and filtered by the air filter b26 through the secondary air inlet 27, it flows to the wet channel of the indirect evaporative cooling heat exchange core 3 for heat exchange, and then passes through the secondary air exhaust fan 8 The provided power cools the condenser 6, and finally the secondary air carrying heat is discharged from the secondary air exhaust port 9, which greatly improves the energy efficiency of the unit.

According to the working process of the water distribution system: the water distribution system of the indirect evaporative cooling section includes the water pump b23, the water collecting tank b25 and the water distributor 4. The water distributor 4 is arranged on the upper part of the indirect evaporative cooling heat exchange core 3, and the power provided by the water pump b23 , the water in the collection tank b25 is transported to the water distributor 4 through the pipeline b24 for water distribution; the humidification section water distribution system includes the high-pressure spray water distributor 13, the water pump a20, and the water collection tank a18, which are connected to each other through the pipeline a19 in turn, and the water pump a20 provides power The water in the water collecting tank a18 is sent to the high-pressure spray water distributor 13 to humidify the primary air of the return air in the data processing room, and the humidification section is turned on according to the humidity requirements.

The indirect evaporative cooling air-conditioning unit used in the data center of the utility model has three working modes, and the working process is as follows:

(1) Dry mode: In winter, when the ambient temperature is low, the unit operates in dry mode. At this time, neither the spray evaporation system nor the mechanical refrigeration system is in operation, and both the electric damper a7 and the electric damper b12 are fully opened. The outdoor low-temperature air enters from the secondary air inlet 27 of the unit, and enters the wet channel of the indirect evaporative cooling heat exchange core 3 for heat exchange. At this time, the electric air valve a7 is opened, and the secondary air exhaust fan does not pass through the condenser 6 directly. 8 is exhausted to the outside; the return air with a higher temperature in the data processing room first enters the unit through the primary air inlet 1, is filtered by the air filter a2, and flows through the indirect evaporative cooling heat exchange core 3. After the dry channel is directly cooled by the outdoor low-temperature air, At this time, the electric air valve b12 is opened, and the primary air blower 15 is directly sent into the data processing room through the primary air supply port 16 without passing through the evaporator 11 .

(2) Wet mode: In the transitional season, when the external ambient temperature is mild, the unit operates in the wet mode. At this time, the spray evaporation system is running, but the mechanical refrigeration system is still not running, and both the electric damper a7 and the electric damper b12 are fully opened. The water distributor 4 of the spray evaporation system sprays circulating water to the indirect evaporative cooling heat exchange core 3, and the outdoor low-temperature air enters from the secondary air inlet 27 of the unit, and is filtered by the air filter b26, and enters the indirect evaporative cooling heat exchange core. 3. The wet channel conducts heat exchange. At this time, the electric air valve a7 is opened, and the outdoor secondary air is directly discharged to the outside through the secondary air exhaust fan 8 without passing through the condenser 6; The air inlet 1 enters the unit, is filtered by the air filter a2, flows through the dry channel of the indirect evaporative cooling heat exchange core 3, and is cooled by isohumidity. At this time, the electric air valve b12 is opened, and the primary air blower 15 directly passes through the primary air supply fan 15 without passing through the evaporator 11. The primary air supply port 16 is sent into the data processing room. According to the humidity requirements of the data center, the high-pressure spray water distributor 13 can be adjusted to humidify the data processing room.

(3) Hybrid mode: In hot summer, when the outdoor temperature is high and the wet bulb temperature is also high, the unit operates in the hybrid mode. At this time, the spray evaporation system and the mechanical refrigeration system are running at the same time, and the electric air valve a7 and the electric air valve b12 are all closed to achieve the required cooling capacity together. The water distributor 4 of the spray evaporation system sprays circulating water to the indirect evaporative cooling heat exchange core 3, and the outdoor low-temperature air enters from the secondary air inlet 27 of the unit, and is filtered by the air filter b26, and enters the indirect evaporative cooling heat exchange core. 3. The wet channel conducts heat exchange. At this time, the electric air valve a7 is closed, and the heated outdoor secondary air passes through the condenser 6 to absorb the condensation heat, and finally is discharged to the outside through the secondary air exhaust fan 8; the temperature of the data processing room is relatively high. The return air first enters the unit through the primary air inlet 1, is filtered by the air filter a2, flows through the dry channel of the indirect evaporative cooling heat exchange core 3, and is cooled by the wetness. After the evaporator 11 is cooled, the primary air blower 15 is finally sent into the data processing room through the primary air supply port 16 to cool the server to meet the temperature and humidity requirements of the data processing room, thus forming a cycle.

Claims (8)

1. An indirect evaporative cooling air conditioning unit for a data center is characterized by comprising a unit shell, wherein a primary air inlet (1) and a primary air supply outlet (16) are respectively arranged on two opposite side walls of the unit shell, and an air filter a (2), an indirect evaporative cooling section, an evaporator combined unit, a humidifying section, a water baffle b (14) and a primary air blower (15) are sequentially arranged in the unit shell according to the flowing direction of primary air after entering; a secondary air outlet (9) is arranged on the unit shell corresponding to the top of the indirect evaporative cooling section, and secondary air inlets (27) are arranged on two side walls of the unit shell corresponding to two opposite side surfaces of the indirect evaporative cooling section; a secondary air exhaust fan (8) is arranged at the secondary air exhaust outlet (9), and a condenser combination unit is arranged between the secondary air exhaust fan (8) and the indirect evaporative cooling section; the condenser combined unit, the expansion valve (10), the evaporator combined unit and the compressor (21) are sequentially connected through a refrigerant pipe (22) to form a circulating closed loop; a control unit (17) is arranged below the primary air blower (15), and the control unit (17) is respectively connected with the indirect evaporative cooling section, the evaporator combined unit, the humidifying section, the condenser combined unit, the secondary air exhaust fan (8) and the primary air blower (15).

2. The indirect evaporative cooling air conditioning unit for data centers as set forth in claim 1, wherein an air filter b (26) is provided at said secondary air inlet (27).

3. The indirect evaporative cooling air conditioning unit for the data center according to claim 1, wherein the indirect evaporative cooling section comprises a water baffle a (5), a water distributor (4), an indirect evaporative cooling heat exchange core (3) and a water collecting tank b (25) which are arranged from top to bottom in sequence, and the water distributor (4) is connected with the water collecting tank b (25) through a water pipe b (24); the secondary air inlet (27) is positioned on the corresponding side wall of the unit shell between the indirect evaporative cooling heat exchange core body (3) and the water collecting tank b (25); and a water pump b (23) is arranged on the water pipe b (24), and the water pump b (23) is connected with the control unit (17).

4. The indirect evaporative cooling air conditioning unit for the data center according to claim 3, wherein the indirect evaporative cooling heat exchange core (3) is composed of one of a plate-fin round tube, a horizontal round tube or a vertical round tube.

5. The indirect evaporative cooling air conditioning unit for the data center according to claim 1, wherein the evaporator combination unit comprises two evaporators (11) which are arranged in a V shape and are connected in parallel, and an electric air valve b (12) is arranged between the two evaporators (11); the condenser combination unit comprises two condensers (6) which are arranged in a V shape and are connected in parallel, an electric air valve a (7) is arranged between the two condensers (6), and the two condensers (6) which are connected in parallel, a compressor (21), two evaporators (11) which are connected in parallel and an expansion valve (10) are sequentially connected through a refrigerant pipe (22) to form a closed circulation loop; the electric air valve b (12) and the electric air valve a (7) are respectively connected with a control unit (17).

6. The indirect evaporative cooling air conditioning unit for the data center according to claim 1, wherein the humidification section comprises a high-pressure spray water distributor (13) vertically arranged in a unit housing, a nozzle of the high-pressure spray water distributor (13) faces a water baffle b (14), a water collection tank a (18) is arranged below the high-pressure spray water distributor (13), the high-pressure spray water distributor (13) is connected with the water collection tank a (18) through a water pipe a (19), a water pump a (20) is further arranged on the water pipe a (19), and the water pump a (20) is connected with the control unit (17).

7. The indirect evaporative cooling air conditioning unit for data centers as set forth in claim 1, wherein said secondary air blower (8) is an axial fan.

8. An indirect evaporative cooling air conditioning unit for a data center as set forth in claim 1 wherein the primary air blower (15) is a centrifugal fan.

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