WO2023005472A1

WO2023005472A1 - Indirect evaporative cooling system and data center machine room

Info

Publication number: WO2023005472A1
Application number: PCT/CN2022/098764
Authority: WO
Inventors: 王爱辉; 蒋钢; 张凯; 陈俊升; 陈玉敏
Original assignee: 中兴通讯股份有限公司
Priority date: 2021-07-26
Filing date: 2022-06-14
Publication date: 2023-02-02
Also published as: CN115682193A

Abstract

An indirect evaporative cooling system and a data center machine room. The indirect evaporative cooling system comprises a housing (100), a heat exchange core set (200), an internal circulation fan set (300), an external circulation fan set (400), a sprinkler assembly (500), and an auxiliary refrigeration assembly (600). The interior of the housing (100) is divided into an indoor circulation chamber (110), an outdoor circulation chamber (120), and a maintenance chamber (130). The indoor circulation chamber (110) comprises a first air return channel (111), a second air return channel (112), and an air supply channel (113); the outdoor circulation chamber (120) comprises a first air intake channel (121), a second air intake channel (122), and an air-out channel (123). The heat exchange core set (200) comprises a first heat exchange core body (210) and a second heat exchange core body (220), the first heat exchange core body (210) being connected to both the first air return channel (111) and the first air intake channel (121), and the second heat exchange core body (220) being connected to both the second air return channel (112) and the second air intake channel (122).

Description

Indirect evaporative cooling system and data center computer room

Cross References to Related Applications

This application is based on a Chinese patent application with application number 202110842780.4 and a filing date of July 26, 2021, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The embodiments of the present application relate to but are not limited to the technical field of data center temperature and humidity control, and particularly relate to an indirect evaporative cooling system and a data center computer room.

Background technique

The indirect evaporative cooling system (hereinafter referred to as the unit) of the existing data center temperature control equipment has been more and more used due to its energy-saving characteristics. Heat to achieve the effect of energy saving. Due to the large size of the unit, its use scenario is usually placed on the facade of the data center and needs to send and return air on the same side. Therefore, the core layout commonly used at present is stacked in the shape of a "field" and arranged in a straight line in the shape of a "one". The "Tian"-shaped stacking design has a longer air flow path, which increases the pressure drop on the air side and thus increases the fan power of the unit; although the "one"-shaped stacking design alleviates the problem of too long air flow paths to a certain extent, the flow field There are more bends and greater wind resistance.

Contents of the invention

The following is an overview of the topics described in detail in this article. This summary is not intended to limit the scope of the claims.

An embodiment of the present application provides an indirect evaporative cooling system.

In the first aspect, the embodiment of the present application provides an indirect evaporative cooling system, including: a shell, the interior is divided to form an indoor circulation chamber, an outdoor circulation chamber and a maintenance chamber, the indoor circulation chamber includes The first return air passage, the second return air passage and the air supply passage are arranged in the direction, and the first return air passage and the second return air passage are located at two ends of the air supply passage along the width direction of the housing. side and communicates with the air supply channel, the housing is provided with a first air return port communicated with the first return air channel, a second air return port communicated with the second air return channel and a second air return port communicated with the air supply channel The air supply port connected by the air channel, the first air return port, the second air return port and the air supply port are all arranged at one end of the casing along the length direction, and the outdoor circulation chamber includes The first air inlet passage, the second air inlet passage and the air outlet passage arranged in the length direction, the first air inlet passage and the second air inlet passage are located on both sides of the air outlet passage along the width direction of the housing and communicate with the air outlet channel, the housing is provided with a first air inlet communicated with the first air inlet channel, a second air inlet communicated with the second air inlet channel, and a second air inlet communicated with the air outlet channel. The air outlet connected by the channel; the heat exchange core group, including the first heat exchange core and the second heat exchange core arranged along the length direction of the housing, the first heat exchange core and the first heat exchange core Both the return air channel and the first air inlet channel communicate with each other, and are used for heat exchange between the air in the first return air channel and the air in the first air inlet channel, and the second heat exchange core and the Both the second air return channel and the second air inlet channel are connected, and are used for heat exchange between the air in the second air return channel and the air in the second air inlet channel; the internal circulation fan unit is used to drive the indoor The air enters the indoor circulation cavity from the first air return port and the second air return port, and is discharged into the room from the air supply port after passing through the heat exchange core group; the external circulation fan unit is used to drive the outdoor The air enters the outdoor circulation cavity from the first air inlet and the second air inlet, passes through the heat exchange core group, and is discharged from the air outlet to the outside; the spray assembly is provided with a The spray pipe in the circulation chamber is used for spraying the outdoor air entering the outdoor circulation chamber; the auxiliary refrigeration assembly is provided with a connected evaporator, condenser and compressor, and the evaporator is located at In the air supply channel between the air outlet and the heat exchange core group, the condenser is located in the air outlet channel between the air outlet and the heat exchange core group, and the compressor is located in Inside the maintenance chamber.

In a second aspect, an embodiment of the present application further provides a data center computer room, where the data center computer room includes the above-mentioned indirect evaporative cooling system.

Additional features and advantages of the application will be set forth in the description which follows, and, in part, will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the technical solution of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical solution of the present application, and do not constitute a limitation to the technical solution of the present application.

Fig. 1 is a schematic top view of an indirect evaporative cooling system provided by an embodiment of the present application;

Fig. 2 is a schematic diagram of the air flow organization of Fig. 1 at the cross-sectional view at A-A;

Fig. 3 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view at B-B in Fig. 2;

Fig. 4 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view at C-C in Fig. 3;

Fig. 5 is a top view of an indirect evaporative cooling system provided by another embodiment of the present application;

Fig. 6 is a schematic diagram of the air flow organization and flow direction of the cross-sectional view at D-D in Fig. 5;

Fig. 7 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view of E-E in Fig. 5;

Fig. 8 is a top view of an indirect evaporative cooling system provided by another embodiment of the present application;

Fig. 9 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view at F-F of Fig. 8;

Fig. 10 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view at G-G in Fig. 9;

Fig. 11 is a schematic diagram of the flow direction of the airflow organization at the cross-sectional view at H-H in Fig. 10;

Fig. 12 is a cross-sectional view of an indirect evaporative cooling system provided by another embodiment of the present application from a top perspective.

Explanation of reference signs:

Housing 100, indoor circulation chamber 110, first air return channel 111, second air return channel 112, air supply channel 113, first air return port 114, second air return port 115, air supply port 116, outdoor circulation chamber 120, second air return channel First air inlet 121, second air inlet 122, air outlet 123, first air inlet 124, second air inlet 125, air outlet 126, maintenance cavity 130, outer maintenance door 131, inner maintenance door 132, weak current cabinet 140, strong electric cabinet 150;

Heat exchange core group 200, first heat exchange core 210, second heat exchange core 220;

Internal circulation fan unit 300, first fan 310;

External circulation fan unit 400, second fan 410;

Spray assembly 500, spray pipe 510, first nozzle 520, second nozzle 530, water tray 540, water pump 550, pipeline system 560;

Auxiliary refrigeration assembly 600, evaporator 610, condenser 620, compressor 630, installation platform 631, escalator 632;

Bypass ventilation valve 700.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

In the description of the present application, it should be understood that the orientation descriptions, such as "up", "down", etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this application. The application and simplified description do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the application.

It should be noted that although the functional modules are divided in the schematic diagram of the device, and the logical sequence is shown in the flowchart, in some cases, it can be executed in a different order than the module division in the device or the flowchart in the flowchart. steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.

In the description of the present application, unless otherwise specified, "plurality" means two or more.

In the description of this application, it should be noted that, unless otherwise clearly defined, terms such as "installation" and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the above-mentioned words in combination with the specific content of the technical solution. specific meaning in this application.

This application provides an indirect evaporative cooling system and a data center computer room. The indirect evaporative cooling system includes a shell 100, a heat exchange core group 200, an internal circulation fan unit 300, an external circulation fan unit 400, a spray assembly 500 and an auxiliary Refrigeration assembly 600, the interior of the shell 100 is divided to form an indoor circulation chamber 110, an outdoor circulation chamber 120 and a maintenance chamber 130, the indoor circulation chamber 110 includes a first return air passage 111, a second return air passage arranged along the The air passage 112 and the air supply passage 113, the outdoor circulation chamber 120 includes a first air inlet passage 121, a second air inlet passage 122 and an air outlet passage 123 arranged along the length direction of the casing 100, and the heat exchange core group 200 includes a The first heat exchange core 210 and the second heat exchange core 220 are arranged in the longitudinal direction of the housing 100. The first heat exchange core 210 communicates with the first return air passage 111 and the first air intake passage 121, and the second The heat exchange core 220 communicates with both the second return air passage 112 and the second air intake passage 122 . According to the scheme provided by the embodiment of the present application, when the indirect evaporative cooling system is working, the internal circulation fan unit 300 drives the air in the machine room to enter the first return air from the first return air outlet 114 and the second return air outlet 115 on both sides of the housing 100 respectively. The channel 111 and the second return air channel 112 form a two-way return air, and then the two air flows pass through the heat exchange core group 200 and the evaporator 610 to exchange heat and cool down, then enter the air supply channel 113 in opposite directions, and finally discharge into the room from the air supply port 116 , the system optimizes the airflow organization through the setting of two-way return air, effectively reduces the airflow resistance and improves the energy efficiency of the system, and the compressor 630 is set in the maintenance chamber 130, which further reduces the airflow resistance of the system and facilitates the compressor 630 maintenance.

The embodiments of the present application will be further described below in conjunction with the accompanying drawings. The dotted arrows in the drawings represent the flow direction of outdoor air, and the solid line arrows represent the flow direction of indoor air.

As shown in FIGS. 1 to 4 , the indirect evaporative cooling system includes a shell 100 , a heat exchange core group 200 , an inner circulation fan unit 300 , an outer circulation fan unit 400 , a spray assembly 500 and an auxiliary refrigeration assembly 600 . The casing 100 is roughly in the shape of a cuboid. The interior of the casing 100 is partitioned to form an isolated indoor circulation chamber 110 , an outdoor circulation chamber 120 and a maintenance chamber 130 . The maintenance chamber 130 is located at one end of the casing 100 in the longitudinal direction. The indoor circulation chamber 110 includes a first air return channel 111 , a second air return channel 112 and an air supply channel 113 , and the first return air channel 111 and the second air return channel 112 communicate with the air supply channel 113 respectively. Specifically, the first return air passage 111, the second return air passage 112 and the air supply passage 113 are arranged along the length direction of the casing 100, and the first return air passage 111 and the second return air passage 112 are located along the air supply passage 113. On both sides of the housing 100 in the width direction, the air supply channel 113 is closer to the lower end of the housing 100 relative to the first return air channel 111 and the second return air channel 112, and the first return air channel 111 and the second return air channel 112 can be It is arranged symmetrically with respect to the center line of the air supply channel 113 . The other end of the casing 100 in the length direction is provided with a first air return port 114, a second air return port 115 and an air supply port 116, the first air return port 114 and the second air return port 115 are located on both sides of the air supply port 116, and the first air return port 114 It communicates with the first air return channel 111, the second air return port 115 communicates with the second air return channel 112, the air supply port 116 communicates with the air supply channel 113, and the air in the machine room enters the first air return channel 111 through the first air return port 114 , and enter the second return air channel 112 through the second return air port 115, thereby forming a two-way return air flow, optimizing the air flow organization of the system, and the air flow in the two return air channels passes through the heat exchange core group 200 and the evaporator 610 for heat exchange After cooling down, it enters the air supply channel 113, and then is discharged into the room of the machine room through the air supply port 116, thereby forming an internal circulation of the air in the machine room.

As shown in FIG. 2 and FIG. 3 , the outdoor circulation chamber 120 includes a first air inlet channel, a second air inlet channel and an air outlet channel 123 , and the first air inlet channel and the second air inlet channel communicate with the air outlet channel 123 respectively. Specifically, the first air inlet passage, the second air inlet passage and the air outlet passage 123 are all arranged along the length direction of the housing 100, and the first air inlet passage and the second air inlet passage are located along the air outlet passage 123 along the housing 100. On both sides of the width direction, the air outlet channel 123 is close to the upper end of the housing 100, the first air inlet channel and the first return air channel 111 are located on one side of the air supply channel 113, the second air inlet channel and the second return air channel 112 is located on the other side of the air supply channel 113 . The casing 100 is provided with a first air inlet 124 , a second air inlet 125 and an air outlet 126 , and the first air inlet 124 and the second air inlet 125 can be provided with a high-efficiency filter to filter impurities such as dust in the air. The first air inlet 124 and the second air inlet 125 can be arranged on the two side walls in the width direction of the housing 100, the air outlet 126 can be arranged on the top wall of the housing 100, and the first air inlet 124 communicates with the first air inlet passage , the second air inlet 125 communicates with the second air inlet channel, and the air outlet 126 communicates with the air outlet channel 123 . Outdoor air enters the first air inlet passage through the first air inlet 124, and enters the second air inlet passage through the second air inlet 125, and the airflow in the two air inlet passages passes through heat exchange with the airflow of the two return air passages. , then enters the air outlet channel 123, and finally is discharged outside from the air outlet 126, thereby forming an external circulation of outdoor air.

As shown in FIG. 3 and FIG. 10 , the heat exchange core group 200 includes a first heat exchange core 210 and a second heat exchange core 220 arranged along the length direction of the casing 100, the first heat exchange core 210 and the second heat exchange core A return air channel 111 communicates with the first air intake channel, and the indoor air in the first air return channel 111 and the outdoor air in the first air intake channel exchange heat through the first heat exchange core 210 . Similarly, the second heat exchange core 220 communicates with both the second return air passage 112 and the second air intake passage, and the indoor air in the second return air passage 112 and the outdoor air in the second air intake passage pass through the second heat exchange core Body 220 performs heat exchange.

As shown in FIG. 2 , the internal circulation fan unit 300 is used to drive indoor air from the first air return port 114 and the second air return port 115 into the indoor circulation cavity 110 , and after passing through the heat exchange core group 200 , it is discharged into the room from the air supply port 116 . The external circulation fan unit 400 is used to drive outdoor air to enter the outdoor circulation chamber 120 from the first air inlet 124 and the second air inlet 125 , and to be discharged outside through the air outlet 126 after passing through the heat exchange core group 200 .

As shown in Figure 2, the spray assembly 500 is provided with a spray pipe 510 located in the outdoor circulation chamber 120, and the spray pipe 510 is used to spray the outdoor air entering the outdoor circulation chamber 120, so that the outdoor air can be absorbed through the evaporation of water. The heat of the air realizes the cooling of the outdoor air, so that the outdoor air can cool the indoor air through the heat exchange core group 200 .

As shown in FIG. 2 and FIG. 3 , the auxiliary refrigeration assembly 600 is provided with a connected evaporator 610 , a condenser 620 and a compressor 630 , and the evaporator 610 is located in the air supply channel between the air supply port 116 and the heat exchange core group 200 In 113 , the condenser 620 is located in the air outlet channel 123 between the air outlet 126 and the heat exchange core group 200 , and the compressor 630 is located in the maintenance chamber 130 . When the cooling effect of the system does not reach the set target, the indoor air can be further cooled by the auxiliary refrigeration component 600 . When the auxiliary refrigeration assembly 600 is turned on, the air in the air supply channel 113 is further cooled after passing through the evaporator 610, and the outdoor air in the air outlet channel 123 can take away the heat of the condenser 620 when it passes through the condenser 620, thereby realizing the cooling effect of the condenser. 620 cooling. The maintenance chamber 130 can be provided with an installation platform 631 on which the compressor 630 is located, and the installation platform 631 can be provided with an escalator 632 for easy up and down, so as to prevent the compressor 630 from being arranged in the outdoor circulation chamber 120 from increasing wind resistance, and at the same time Maintenance of the compressor 630 may also be facilitated.

As shown in FIG. 9 , in one embodiment, along the height direction of the housing 100 , the end of the first heat exchange core 210 facing the air outlet channel 123 and the end of the second heat exchange core 220 facing the air outlet channel 123 gradually Set close to each other, so that the first heat exchange core 210 and the second heat exchange core 220 are in an inverted V shape, which is conducive to the rapid drainage of the first heat exchange core 210 and the second heat exchange core 220, and reduces the temperature in winter, etc. In the case of low temperature, the first heat exchange core 210 and the second heat exchange core 220 may be damaged due to frosting or freezing of condensed water.

As shown in FIG. 12 , in one embodiment, along the length direction of the housing 100 , the end of the first heat exchange core 210 away from the first air return port 114 and the end of the second heat exchange core 220 away from the second air return port 115 One end is gradually set away from, so that the first return air passage 111 and the second return air passage 112 are gradually narrowed along the length direction of the housing 100, which is conducive to reducing the inlet wind speed of the first return air port 114 and the second return air port 115, reducing The wind resistance in the indoor circulation cavity 110 is conducive to further improving the energy efficiency of the system. As shown in FIGS. 3 and 4 , in one embodiment, since the housing 100 has a large longitudinal dimension, in order to better realize the internal circulation of indoor air, the internal circulation fan unit 300 includes a plurality of first fans 310 A plurality of first fans 310 are arranged at intervals in the air supply channel 113 along the length direction of the casing 100, so that the air supply channel 113 can be blown by the plurality of first fans 310 in the length direction of the casing 100, improving The smoothness of indoor air circulation.

As shown in FIG. 6 , in one embodiment, the end of the air supply channel 113 away from the evaporator 610 gradually increases in the shape of a trumpet along the height direction of the housing 100, that is, the air supply end surface of the air supply channel 113 is in the shape of a trumpet. After a lot of simulation analysis by the inventor, at this time, the air supply resistance of the first fan 310 in the air supply channel 113 can be further reduced, thereby further improving the energy efficiency of the system.

As shown in Fig. 7 and Fig. 11, in one embodiment, a plurality of first fans 310 are configured as multiple groups of first fan groups, each group of first fan groups includes at least one first fan group 310, and multiple groups of first fan groups Staggered settings along the height direction of the casing 100, for example, along the direction close to the air supply port 116, the positions of multiple first fan groups gradually rise or fall, so that each first fan group is in the height direction of the casing 100 The air supply is staggered to reduce the resistance of the air supply and achieve a more uniform air supply effect. As shown in FIG. 12 , of course, multiple groups of first fan units may be staggered along the width direction of the casing 100, so that each first fan group staggers the air supply in the width direction of the casing 100, thereby reducing the air supply. The resistance can achieve a more uniform air supply effect. It is also possible that multiple sets of first fan units are staggered along the height direction of the casing 100 and staggered along the width direction of the casing 100, so that a more uniform air supply effect can be obtained.

As shown in FIG. 8 , in one embodiment, due to the large size of the housing 100 in the longitudinal direction, in order to better realize the external circulation of outdoor air, the external circulation fan unit 400 includes a plurality of second fans 410, a plurality of The second fan 410 is arranged on the outer wall of the housing 100 at intervals along the length direction of the housing 100, and the outer wall of the housing 100 is provided with an air outlet 126 at a corresponding position, and the second fan 410 is installed at the air outlet 126, so that the air outlet channel 123 Along the length direction of the casing 100 , multiple second fans 410 can be used to blow out air, so as to improve the smoothness of external circulation of outdoor air. The plurality of second fans 410 may be arranged as a group of second fan groups arranged in a line, or as two groups of second fan groups arranged side by side.

As shown in FIGS. 1 and 5 , in one embodiment, a plurality of second fans 410 are arranged as two groups of second fan groups arranged side by side on the outer wall of the casing 100, wherein one group of second fan groups is used to turn the first The outdoor air in the air passage is exhausted outside, and another set of second fan units is used to discharge the outdoor air in the second air inlet passage outdoors, so that more efficient air outlet can be realized.

As shown in Figures 5 and 6, in one embodiment, along the height direction of the housing 100, two sets of second fan units are gradually set away from the end of the housing 100, so that the two groups of second fan units are V-shaped. , so that the accumulation of rainwater or snow on the top of the second fan 410 can be reduced. Of course, when the plurality of second fans 410 are arranged as a group of second fan units arranged in a line, the second fan units can also be arranged obliquely, and the above-mentioned technical effect can also be obtained.

As shown in Figure 2, in one embodiment, both the first heat exchange core 210 and the second heat exchange core 220 have a double-layer core structure, and the double-layer core structure includes first cores distributed up and down. and the second core, the shower pipe 510 is arranged between the first core and the second core, the shower pipe 510 is provided with a first nozzle 520 towards the first core and a second nozzle towards the second core 530, the diameter of the first nozzle 520 is smaller than the diameter of the second nozzle 530, so that the water sprayed by the first nozzle 520 can form more water mist, which is beneficial to improve the effect of water vaporization and heat absorption, and improve the heat exchange core. Heat transfer efficiency of group 200.

As shown in Fig. 2 and Fig. 4, in one embodiment, the spray assembly 500 is also provided with a water receiving tray 540 and a water pump 550, and the water receiving tray 540 is located in the outdoor circulation chamber 120 for receiving the water sprayed from the spray pipe 510. Water, the water pump 550 is used to transport the water from the water receiving tray 540 to the spray pipe 510, so as to realize water recycling, save water resources, and reduce the use cost of the system.

As shown in Fig. 6 and Fig. 7, in one embodiment, the water pump 550 is a pipeline pump, and the pipeline pump is arranged in the maintenance chamber 130, so as to facilitate the maintenance of the pipeline pump and prevent the pipeline pump from being easily damaged due to damaged by low temperatures. Of course, the pipeline system 560 and corresponding sensors of the spray assembly 500 can also be arranged in the maintenance cavity 130, so as to effectively prevent the failure of the pipeline system 560, sensors and other components due to low temperature, and also facilitate daily maintenance. Certainly, as shown in FIG. 2 and FIG. 9 , the water pump 550 may also be a submersible pump, which is arranged on the water receiving tray 540 .

As shown in Figure 6, in one embodiment, the bottom wall of the water receiving tray 540 has a sunken position, the position of the sunken position is relatively low so as to facilitate the accumulation of water, the pipeline pump is connected with a suction pipe extending into the sunken position, so that The pipeline pump can more fully absorb the water on the water receiving tray 540 . The water receiving tray 540 may have a V-shaped structure, so that a sink is formed in the middle of its bottom wall. The water receiving tray 540 may also be inclined so that a sink is formed on one side thereof. Of course, the water receiving tray 540 can also be formed with a sunken position in the center relative to the outer periphery.

As shown in Figure 3 and Figure 4, in an embodiment, the indirect evaporative cooling system also includes a weak current cabinet 140 and a strong current cabinet 150, the corresponding functional modules of the weak current cabinet 140 and the strong The electric cabinet 150 is arranged in the maintenance cavity 130, so that the maintenance of the weak current cabinet 140 and the strong current cabinet 150 can be facilitated, and it is not necessary to separately set a maintenance rainproof shed for maintenance in rainy and snowy days. Specifically, the maintenance doors of the strong current cabinet 150 and the weak current cabinet 140 are set as inward opening maintenance doors. An inner maintenance door 132 may also be provided between the maintenance chamber 130 and the indoor circulation chamber 110 , so as to facilitate entering the indoor circulation chamber 110 through the maintenance chamber 130 . Of course, the maintenance chamber 130 is also provided with an outer maintenance door 131 for communicating with the outside world.

As shown in Figure 7, in one embodiment, the indirect evaporative cooling system further includes a bypass air valve 700, the gap between the evaporator 610 and the inner wall of the air supply channel 113 forms a bypass area, and the bypass air valve 700 is arranged on bypass area. When the system is in the non-auxiliary refrigeration working condition, that is, when the system does not need to open the auxiliary refrigeration assembly 600 to achieve the cooling effect, by opening the bypass ventilation valve 700, the wind resistance of the indoor air circulation can be effectively reduced, which is conducive to improving the overall performance of the system. annual energy efficiency.

In addition, an embodiment of the present application also provides a data center computer room including the above-mentioned indirect evaporative cooling system. The data center computer room adopts natural cooling and mechanical auxiliary cooling through the indirect evaporative cooling system, and can provide corresponding Cooling capacity, to meet the demand for air cooling and heat dissipation of data center equipment.

The embodiment of the present application includes: the indirect evaporative cooling system includes a shell, a heat exchange core group, an internal circulation fan unit, an external circulation fan unit, a spray assembly and an auxiliary refrigeration assembly, wherein the internal partition of the shell forms an indoor circulation cavity, an outdoor circulation cavity and a maintenance cavity, the indoor circulation cavity includes a first return air passage, a second return air passage and an air supply passage arranged along the length direction of the shell, and the outdoor circulation chamber includes a first return air passage arranged along the length direction of the casing An air inlet channel, a second air inlet channel and an air outlet channel, the heat exchange core group includes a first heat exchange core and a second heat exchange core arranged along the length direction of the shell, the first heat exchange core and Both the first return air passage and the first air inlet passage are connected, and the second heat exchange core is connected with both the second return air passage and the second air inlet passage. According to the solution provided by the embodiment of this application, when the indirect evaporative cooling system is working, the internal circulation fan unit drives the air in the machine room to enter the first return air channel and the second air return channel from the first return air outlet and the second air return port on both sides of the casing The return air channel, thus forming a two-way return air, and then the two airflows pass through the heat exchange core group and the evaporator to exchange heat and cool down, then enter the air supply channel in opposite directions, and finally discharge into the room from the air supply port. The compressor is placed in the maintenance cavity, which optimizes the airflow organization, effectively reduces the airflow resistance, and improves the energy efficiency of the system.

The above is a specific description of some implementations of the present application, but the present application is not limited to the above-mentioned embodiments. Those skilled in the art can also make various equivalent deformations or replacements without departing from the scope of the present application. Any modification or substitution is included within the scope defined by the claims of the present application.

Claims

An indirect evaporative cooling system comprising:

The housing is internally divided to form an indoor circulation chamber, an outdoor circulation chamber and a maintenance chamber, and the indoor circulation chamber includes a first return air passage, a second return air passage and an air supply passage arranged along the length direction of the housing, The first return air channel and the second return air channel are located on both sides of the air supply channel along the width direction of the housing and communicate with the air supply channel, and the housing is provided with a The first air return port communicated with the first air return channel, the second air return port communicated with the second air return channel, and the air supply port communicated with the air supply channel, the first air return port, the second air return channel The air outlet and the air supply outlet are both arranged at one end of the housing along the length direction, and the outdoor circulation chamber includes a first air inlet channel, a second air inlet channel and an air outlet channel arranged along the length direction of the housing , the first air inlet channel and the second air inlet channel are located on both sides of the air outlet channel along the width direction of the housing and communicate with the air outlet channel, and the housing is provided with a a first air inlet connected to the air inlet passage, a second air inlet connected to the second air inlet passage and an air outlet connected to the air outlet passage;

The heat exchange core group includes a first heat exchange core and a second heat exchange core arranged along the length direction of the casing, the first heat exchange core is connected with the first return air channel and the The first air inlet passages are connected to each other for heat exchange between the air in the first air return passage and the air in the first air inlet passage, and the second heat exchange core is connected to the second return air passage and the air in the first air inlet passage. The second air inlet passages are connected to each other for heat exchange between the air in the second return air passage and the air in the second air inlet passage;

The internal circulation fan unit is used to drive indoor air to enter the indoor circulation chamber from the first air return port and the second air return port, and discharge it into the room from the air supply port after passing through the heat exchange core group;

The external circulation fan unit is used to drive the outdoor air to enter the outdoor circulation cavity from the first air inlet and the second air inlet, and discharge it out of the outdoor through the air outlet after passing through the heat exchange core group;

The spray assembly is provided with a spray pipe located in the outdoor circulation chamber, and the spray pipe is used to spray the outdoor air entering the outdoor circulation chamber;

Auxiliary refrigeration components are provided with a connected evaporator, condenser and compressor, the evaporator is located in the air supply channel between the air supply port and the heat exchange core group, and the condenser is located in the In the air outlet channel between the air outlet and the heat exchange core group, the compressor is located in the maintenance chamber.
The indirect evaporative cooling system according to claim 1, wherein, along the height direction of the casing, the first heat exchange core faces one end of the air outlet channel and the second heat exchange core faces the One end of the air outlet channel is gradually approached to be arranged.
The indirect evaporative cooling system according to claim 1, wherein, along the length direction of the housing, the end of the first heat exchange core away from the first air return port and the end of the second heat exchange core away from One end of the second return air outlet is set gradually away from it.
The indirect evaporative cooling system according to claim 1, wherein the internal circulation fan unit includes a plurality of first fans, and the plurality of first fans are arranged at intervals in the air supply channel along the length direction of the casing Inside.
The indirect evaporative cooling system according to claim 4, wherein, the end of the air supply channel away from the evaporator gradually increases in a trumpet shape along the height direction of the casing.
The indirect evaporative cooling system according to claim 4, wherein the plurality of first fans are configured as multiple groups of first fan groups, each group of first fan groups includes at least one first fan, along the In the height direction of the housing, multiple sets of the first fan units are arranged staggered; and/or along the width direction of the housing, multiple sets of the first fan units are arranged staggered.
The indirect evaporative cooling system according to claim 1, wherein the external circulation fan unit includes a plurality of second fans, and the plurality of second fans are arranged at intervals along the length direction of the casing at the sides of the casing outer wall.
The indirect evaporative cooling system according to claim 7, wherein the plurality of second fans are configured as two sets of second fans, and the two sets of second fans are arranged side by side on the outer wall of the casing.
The indirect evaporative cooling system according to claim 8, wherein, along the height direction of the casing, two groups of the second fan units are arranged gradually away from the ends facing away from the casing.
The indirect evaporative cooling system according to claim 1, wherein both the first heat exchange core and the second heat exchange core have a double-layer core structure, and the double-layer core structure includes upper and lower distributed first cores and second cores, the shower pipe is arranged between the first core and the second core, and the shower pipe is provided with a A first nozzle and a second nozzle facing the second core, the diameter of the first nozzle being smaller than the diameter of the second nozzle.
The indirect evaporative cooling system according to claim 10, wherein the spray assembly is further provided with a water receiving pan and a water pump, and the water receiving pan is located in the outdoor circulation chamber for receiving the spray from the spray pipe. water, and the water pump is used to transport the water in the water receiving tray to the spray pipe.
The indirect evaporative cooling system according to claim 11, wherein the water pump is a pipeline pump, and the pipeline pump is arranged in the maintenance chamber.
The indirect evaporative cooling system according to claim 12, wherein the bottom wall of the water receiving tray has a sink, and the pipeline pump is connected with a water suction pipe extending into the sink.
The indirect evaporative cooling system according to claim 1, wherein the indirect evaporative cooling system further comprises a weak current cabinet and a strong current cabinet, and the weak current cabinet and the strong current cabinet are arranged in the maintenance chamber.
The indirect evaporative cooling system according to any one of claims 1 to 14, wherein the indirect evaporative cooling system further includes a bypass air valve, and a gap is formed between the evaporator and the inner wall of the air supply channel A bypass area, the bypass air valve is arranged in the bypass area.
A data center computer room, comprising the indirect evaporative cooling system according to any one of claims 1 to 15.