Indirect evaporative cooling unit

Abstract

The utility model provides an indirect evaporative cooling unit, and relates to the technical field of cooling equipment. The indirect evaporative cooling unit comprises a case, a heat exchanger and an indoor air supply fan. The heat exchanger is arranged in the case, and the length direction of the heat exchanger is the same as that of the case. An air inlet and an air outlet are formed in the two sides, in the width direction of the machine box, of the heat exchanger correspondingly and communicate with the two ends of a heat exchange flow channel, used for allowing indoor air to flow, of the heat exchanger correspondingly. The indoor air supply fan is arranged on the downstream of the air outlet in the indoor air flowing direction and used for sucking air towards the air outlet. Therefore, the energy efficiency of the indirect evaporative cooling unit is improved.

Description

Technical Field

[0001] This application relates to the technical field of cooling equipment, and particularly to an indirect evaporative cooling unit. Background Art

[0002] A data center can be used to transmit, accelerate, display, calculate, and store data information on a network infrastructure. With the rapid development of the information and communication technology industry, the heat generated during the operation of the data center is getting higher and higher, and the requirements for heat dissipation of the data center are also getting higher and higher.

[0003] To meet the heat dissipation requirements of the data center, an indirect evaporative cooling unit can be used to cool the air in the computer room of the data center. In the related art, the indirect evaporative cooling unit includes a chassis and a heat exchanger disposed in the chassis. The heat exchanger is used to exchange heat between the indoor return air and the outdoor fresh air. The energy efficiency of the indirect evaporative cooling unit in the related art is relatively low.

[0004] Therefore, how to improve the energy efficiency of the indirect evaporative cooling unit has become an urgent problem to be solved in the design field of the indirect evaporative cooling unit. Summary of the Utility Model

[0005] This application aims to provide an indirect evaporative cooling unit to solve the problem of relatively low energy efficiency of the indirect evaporative cooling unit in the prior art.

[0006] This application provides an indirect evaporative cooling unit, which includes a chassis, a heat exchanger, and an indoor air supply fan. The heat exchanger is disposed in the chassis, and both ends of the heat exchanger in the length direction extend along a first direction. The heat exchanger has a first heat exchange flow channel and a second heat exchange flow channel. The first heat exchange flow channel is used for the indoor air to flow through, and the second heat exchange flow channel is used for the cooling air to flow through. The heat exchanger is used to exchange heat between the indoor air in the first heat exchange flow channel and the cooling air in the second heat exchange flow channel. The two sides of the heat exchanger in the second direction respectively have a first air inlet and a first air outlet. Both ends of the first heat exchange flow channel are respectively communicated with the first air inlet and the first air outlet. The indoor air supply fan is disposed downstream of the first air outlet along the flowing direction of the indoor air, and the indoor air supply fan is used to suck air towards the first air outlet. Wherein, the first direction is the length direction of the chassis, and the second direction is the width direction of the chassis. In this way, the first air inlet, the first air outlet, and the heat exchanger can have larger sizes, and the area of the windward surface of the indoor air of the heat exchanger can be larger. Furthermore, under the requirement of the same cooling capacity, the flow velocity of the indoor air in the indirect evaporative cooling unit can be smaller, and thus the resistance of the indoor air flowing in the indirect evaporative cooling unit can be smaller, which is beneficial to improving the energy efficiency of the indirect evaporative cooling unit. In addition, after the size of the heat exchanger and the windward surface of the indoor air of the heat exchanger are increased, it is also beneficial to improve the cooling capacity of the indirect evaporative cooling unit.

[0007] Optionally, the diameter of the air inlet of the indoor air supply fan is D, and the distance between the air inlet of the indoor air supply fan and the first air outlet is less than or equal to 2D. In this way, the first air outlet can be within the influence range of the negative pressure field generated by the indoor air supply fan. When the first air inlet is gradually affected by a decreasing wind pressure in the second direction from a position close to the second air inlet to a position far from the second air inlet due to a narrow and long indoor return air duct, the wind speed of the indoor air in the first heat exchange flow channel can be made more balanced from a position close to the second air inlet to a position far from the second air inlet through the influence of the negative pressure field generated by the indoor air supply fan. Furthermore, the heat exchanger can have a high heat exchange efficiency, and the flow channel resistance of the first heat exchange flow channel is small, enabling the indirect evaporative cooling unit to have high energy efficiency.

[0008] Optionally, the distance between the air inlet of the indoor air supply fan and the first air outlet is greater than or equal to 0.5D and less than or equal to D.

[0009] Optionally, the indirect evaporative cooling unit includes a plurality of indoor air supply fans arranged along the first direction.

[0010] Optionally, the machine case has an indoor return air duct and an indoor air supply duct. The indoor return air duct and the indoor air supply duct are respectively located on both sides of the heat exchanger in the second direction, and both the indoor return air duct and the indoor air supply duct extend along the first direction. At least one side of the machine case in the first direction has a second air inlet, the second air inlet is opposite to the indoor return air duct in the first direction, and the second air inlet is communicated with the indoor return air duct. At least one side of the machine case in the first direction has a second air outlet, the second air outlet is opposite to the indoor air supply duct in the first direction, and the second air outlet is communicated with the indoor air supply duct. The indoor return air duct is adjacent to the side of the heat exchanger with the first air inlet, and the side of the indoor return air duct facing the first air inlet in the second direction is communicated with the first air inlet. The indoor air supply duct is adjacent to the side of the heat exchanger with the first air outlet, and the side of the indoor air supply duct facing the first air outlet in the second direction is communicated with the first air outlet, and the indoor air supply fan is located in the indoor air supply duct.

[0011] Optionally, the indoor air supply fan is a centrifugal fan.

[0012] Optionally, the machine case includes a first partition, and the first partition is used to form the duct wall at the bottom side of the indoor air supply duct. The indoor air supply fan is fixedly connected to the first partition through a support frame.

[0013] Optionally, the machine case also has a cooling air inlet air duct and a cooling air outlet air duct. The cooling air inlet air duct is located below the heat exchanger, the indoor return air duct and the indoor supply air duct, and the cooling air outlet air duct is located above the heat exchanger. At least one side of the machine case in the second direction has a third air inlet, the third air inlet is opposite to the cooling air inlet air duct in the second direction, and the third air inlet is communicated with the cooling air inlet air duct. The machine case also has a third air outlet, the third air outlet is located above the heat exchanger, the indoor return air duct and the indoor supply air duct, and the third air outlet is communicated with the cooling air outlet air duct. The heat exchanger also has a fourth air inlet and a fourth air outlet, and both ends of the second heat exchange flow path are respectively communicated with the fourth air inlet and the fourth air outlet. The fourth air inlet is located at the bottom side of the heat exchanger and is communicated with the cooling air inlet air duct, and the fourth air outlet is located at the top side of the heat exchanger and is communicated with the cooling air outlet air duct.

[0014] Optionally, an indoor return air filter is provided at the first air inlet, and the indoor return air filter is fixedly connected to the heat exchanger.

[0015] Optionally, the indirect evaporative cooling unit further includes a cooling device. The cooling device is arranged between the indoor supply air fan and the first air outlet, and the cooling device is used for cooling the indoor air flowing out from the first air outlet.

[0016] Optionally, the cooling device is fixedly connected to the heat exchanger, and the indoor supply air fan is fixedly connected to the cooling device through a connecting frame. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 Schematic diagram of the air flow path of an indirect evaporative cooling unit provided by an embodiment of the present application;

[0019] Figure 2 Schematic diagram of the installation of an indirect evaporative cooling unit outside the computer room provided by an embodiment of the present application;

[0020] Figure 3 Another schematic diagram of the installation of an indirect evaporative cooling unit outside the computer room provided by an embodiment of the present application;

[0021] Figure 4 Schematic diagram of a perspective view of an indirect evaporative cooling unit provided by an embodiment of the present application;

[0022] Figure 5 ForFigure 4 Schematic diagram of another perspective of the indirect evaporative cooling unit provided in

[0023] Figure 6 For Figure 5 Enlarged view of part A in

[0024] Figure 7 Schematic diagram of the flow of indoor air in an indirect evaporative cooling unit provided in an embodiment of the present application;

[0025] Figure 8 Schematic diagram of the flow of cooling air in an indirect evaporative cooling unit provided in an embodiment of the present application;

[0026] Figure 9 Schematic diagram of another indirect evaporative cooling unit provided in an embodiment of the present application.

[0027] Explanation of reference numerals:

[0028] 10, Machine room; 20, Indirect evaporative cooling unit; 30, Return air duct; 40, Supply air duct;

[0029] 100, Chassis; 110, Indoor return air duct; 120, Indoor supply air duct; 130, Cooling air inlet duct; 140, Cooling air outlet duct; 150, First partition; 160, Second partition;

[0030] 200, Heat exchanger; 210, First heat exchange flow path; 220, Second heat exchange flow path;

[0031] 310, Indoor supply air fan; 311, Support frame; 312, Connecting frame; 320, Cooling air driving fan;

[0032] 410, Cooling device; 420, Condenser; 430, Spraying assembly; 440, Water baffle; 450, Water receiving tray;

[0033] 500, Indoor return air filter;

[0034] x, First direction; y, Second direction; z, Third direction. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0036] It should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the connection inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0039] In the above description, the description referring to terms such as "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0040] The data center can be used to transfer, accelerate, display, calculate, and store data information on the network infrastructure. With the rapid development of the information and communication technology industry, the heat generated during the operation of the data center is getting higher and higher, and the requirements for the heat dissipation of the data center are also getting higher and higher.

[0041] The data center includes a machine room and multiple electronic devices installed in the machine room. Any one of the electronic devices can include, but is not limited to, servers, distribution boxes, etc. During the operation of the electronic devices, heat is generated, causing the temperature in the machine room to be relatively high.

[0042] To meet the heat dissipation requirements of the data center, an indirect evaporative cooling unit can be used to cool the air in the machine room of the data center.

[0043] Figure 1 This is a schematic diagram of the air flow path of an indirect evaporative cooling unit provided by an embodiment of the present application.

[0044] Among them, L1 is the flow direction of the indoor air, and L2 is the flow direction of the cooling air.

[0045] As Figure 1 shown, in the embodiment of the present application, the indirect evaporative cooling unit 20 is arranged outside the machine room 10. The indirect evaporative cooling unit 20 includes a heat exchanger 200, and the heat exchanger 200 has a first heat exchange flow path 210 and a second heat exchange flow path 220. The indirect evaporative cooling unit 20 has an indoor return air duct 110, an indoor supply air duct 120, a cooling air inlet duct 130, and a cooling air outlet duct 140.

[0046] The indoor return air duct 110 is connected to the machine room 10 through a return air duct 30 to allow the indoor air in the machine room 10 to flow into the indirect evaporative cooling unit 20. The indoor return air duct 110 is also connected to one end of the first heat exchange flow path 210, and the other end of the first heat exchange flow path 210 is connected to the indoor supply air duct 120. The first heat exchange flow path 210 is used for the indoor air to flow through. The indoor supply air duct 120 is connected to the machine room 10 through a supply air duct 40 to allow the indoor air that has undergone heat exchange in the heat exchanger 200 to flow back to the machine room 10.

[0047] The cooling air inlet duct 130 is used for the cooling air to flow into the indirect evaporative cooling unit 20. The cooling air inlet duct 130 is connected to one end of the second heat exchange flow path 220, and the other end of the second heat exchange flow path 220 is connected to the cooling air outlet duct 140. The second heat exchange flow path 220 is used for the cooling air to flow through. The cooling air outlet duct 140 is used for the cooling air that has undergone heat exchange in the heat exchanger 200 to flow out of the indirect evaporative cooling unit 20.

[0048] The heat exchanger 200 is used to exchange heat between the indoor air in the first heat exchange flow path 210 and the cooling air in the second heat exchange flow path 220 to cool the indoor air.

[0049] Exemplarily, the heat exchanger 200 can be an air-to-air heat exchanger.

[0050] In some examples, the cooling air inlet air duct 130 can communicate with the external environment, the cooling air can be natural wind in the external environment, the cooling air outlet air duct 140 can communicate with the external environment, and the cooling air after heat exchange through the heat exchanger 200 can flow back into the external environment. For example, the indirect evaporative cooling unit 20 can be arranged in the equipment room, the cooling air inlet air duct 130 can communicate with the external environment through the inlet air duct, and the cooling air outlet air duct 140 can communicate with the external environment through the outlet air duct.

[0051] In other examples, the cooling air inlet air duct 130 can communicate with the cooling fan, the cooling air can be the refrigerating air provided by the cooling fan, the cooling air outlet air duct 140 can communicate with the external environment, and the cooling air after heat exchange through the heat exchanger 200 can flow back into the external environment. For example, both the indirect evaporative cooling unit 20 and the cooling fan can be arranged in the equipment room, the cooling fan can communicate with the external environment through the inlet air duct, the cooling fan can communicate with the cooling air inlet air duct 130 through the cold air duct, and the cooling air outlet air duct 140 can communicate with the external environment through the outlet air duct.

[0052] Figure 2 The figure is a schematic installation diagram of an indirect evaporative cooling unit provided by an embodiment of the present application outside the computer room.

[0053] As Figure 2 shown, in some examples, the indirect evaporative cooling unit 20 can be arranged on the top of the computer room 10, that is to say, the indirect evaporative cooling unit 20 can be arranged above the ceiling of the computer room 10. At this time, both sides in the length direction of the indirect evaporative cooling unit 20 can be connected to the return air duct 30 and the supply air duct 40 respectively, and the return air duct 30 and the supply air duct 40 can be located on both sides in the length direction of the indirect evaporative cooling unit 20 respectively.

[0054] Figure 3 The figure is another schematic installation diagram of an indirect evaporative cooling unit provided by an embodiment of the present application outside the computer room.

[0055] As Figure 3 shown, in other examples, the indirect evaporative cooling unit 20 can be arranged on the side of the side wall of the computer room 10. At this time, one side in the length direction of the indirect evaporative cooling unit 20 can face the computer room 10, and the side of the indirect evaporative cooling unit 20 facing the computer room 10 is connected to the return air duct 30 and the supply air duct 40, and the return air duct 30 and the supply air duct 40 are located on the side of the indirect evaporative cooling unit 20 facing the computer room 10.

[0056] Figure 4 The figure is a schematic diagram of a perspective view of an indirect evaporative cooling unit provided by an embodiment of the present application, Figure 5 is Figure 4Schematic diagram of another perspective of the indirect evaporative cooling unit provided. Wherein, the x-direction is the first direction, the y-direction is the second direction, the z-direction is the third direction, the first direction is the length direction of the chassis 100, the second direction is the width direction of the chassis 100, the third direction is the height direction of the chassis 100, the first direction is perpendicular to the second direction, the first direction is perpendicular to the third direction, and the second direction is perpendicular to the third direction.

[0057] As Figure 4 , Figure 5 shown, in the embodiment of the present application, the indirect evaporative cooling unit 20 further includes a chassis 100, and the heat exchanger 200 is disposed inside the chassis 100. The length direction of the chassis 100 is the same as the length direction of the indirect evaporative cooling unit 20, the width direction of the chassis 100 is the same as the width direction of the indirect evaporative cooling unit 20, and the height direction of the chassis 100 is the same as the height direction of the indirect evaporative cooling unit 20.

[0058] Inside the chassis 100, there are an indoor return air duct 110, an indoor supply air duct 120, a cooling air inlet duct 130, and a cooling air outlet duct 140.

[0059] Exemplarily, the chassis 100 may include multiple outer plates and multiple partition plates. The multiple outer plates can be spliced to form the outer wall of the chassis 100. The heat exchanger 200 and the partition plates are disposed in the space enclosed by the outer wall of the chassis 100. The outer wall of the chassis 100 and the partition plates can be used to enclose and form the indoor return air duct 110, the indoor supply air duct 120, the cooling air inlet duct 130, and the cooling air outlet duct 140. The indoor return air duct 110, the indoor supply air duct 120, the cooling air inlet duct 130, and the cooling air outlet duct 140 can be separated by the heat exchanger 200 and the partition plates.

[0060] The heat exchanger 200 has a first air inlet, a first air outlet, a fourth air inlet, and a fourth air outlet. The two ends of the first heat exchange flow channel 210 are respectively communicated with the first air inlet and the first air outlet. The two ends of the second heat exchange flow channel 220 are respectively communicated with the fourth air inlet and the fourth air outlet. The indoor return air duct 110 is communicated with the first air inlet. The indoor air flows into the first heat exchange flow channel 210 through the first air inlet. The indoor supply air duct 120 is communicated with the first air outlet. The indoor air flows out of the first heat exchange flow channel 210 through the first air outlet. The cooling air inlet duct 130 is communicated with the fourth air inlet. The cooling air flows into the second heat exchange flow channel 220 through the fourth air inlet. The cooling air outlet duct 140 is communicated with the fourth air outlet. The cooling air flows out of the second heat exchange flow channel 220 through the fourth air outlet.

[0061] The chassis 100 has a second air inlet, a second air outlet, a third air inlet, and a third air outlet. The second air inlet is connected to the indoor return air duct 110. The second air inlet is connected to the machine room 10 through the return air duct 30. The indoor air flows into the indirect evaporative cooling unit 20 through the second air inlet. The second air outlet is connected to the indoor supply air duct 120. The second air outlet is connected to the machine room 10 through the supply air duct. The indoor air flows out of the indirect evaporative cooling unit 20 through the second air outlet. The third air inlet is connected to the cooling air inlet duct 130. The cooling air flows into the indirect evaporative cooling unit 20 through the third air inlet. The third air outlet is connected to the cooling air outlet duct 140. The cooling air flows out of the indirect evaporative cooling unit 20 through the third air outlet.

[0062] In some examples, both the third air inlet and the third air outlet are connected to the external environment.

[0063] In other examples, the third air inlet is connected to the air cooler, and the third air outlet is connected to the external environment.

[0064] In the related art, the first air inlet and the first air outlet are respectively located on two sides of the heat exchanger in the first direction. At this time, limited by the dimensions of the chassis in the width and height directions, the sizes of the first air inlet, the first air outlet, and the heat exchanger are all small, and the area of the windward surface of the indoor air of the heat exchanger is small. Since the area of the windward surface of the indoor air of the heat exchanger is small, it is often necessary to increase the wind speed of the indoor air to increase the cooling capacity of the indirect evaporative cooling unit to meet the cooling demand in the machine room. After the wind speed of the indoor air increases, the resistance of the indoor air flowing in the indirect evaporative cooling unit will increase, resulting in poor energy efficiency of the indirect evaporative cooling unit. In addition, the small size of the heat exchanger and the small area of the windward surface of the indoor air also limit the improvement of the cooling capacity of the indirect evaporative cooling unit.

[0065] As Figure 4 、 Figure 5 shown, based on this, in the embodiment of the present application, both ends of the heat exchanger 200 in the length direction extend along the first direction, and the first air inlet and the first air outlet are respectively located on two sides of the heat exchanger 200 in the second direction.

[0066] In this way, the first air inlet, the first air outlet, and the heat exchanger 200 can have larger sizes, and the area of the windward surface of the indoor air of the heat exchanger 200 can be larger. Furthermore, under the same cooling capacity requirement, the flow rate of the indoor air in the indirect evaporative cooling unit 20 can be smaller, and thus the resistance of the indoor air flowing in the indirect evaporative cooling unit 20 can be smaller, which is beneficial to improving the energy efficiency of the indirect evaporative cooling unit 20. In addition, after the size of the heat exchanger 200 and the area of the windward surface of the indoor air of the heat exchanger 200 increase, it is also beneficial to improve the cooling capacity of the indirect evaporative cooling unit 20.

[0067] The indirect evaporative cooling unit 20 further includes an indoor air supply fan 310, which is arranged downstream of the first air outlet along the indoor air flow direction, and the indoor air supply fan 310 is used to suck air towards the first air outlet.

[0068] In some possible embodiments, the diameter of the air suction port of the indoor air supply fan 310 is D, and the distance between the air suction port of the indoor air supply fan 310 and the first air outlet is less than or equal to 2D.

[0069] When the indoor air supply fan 310 is far from the first air outlet, the first air outlet is not within the influence range of the negative pressure field generated by the indoor air supply fan 310. That is to say, the pressure fields at various positions of the first air outlet are not easily affected by the negative pressure field generated by the indoor air supply fan 310. When the narrow and long indoor return air duct 110 causes the wind pressure along the second direction received by the first air inlet to gradually decrease from the position close to the second air inlet to the position far from the second air inlet, the air velocity of the indoor air in the first heat exchange flow channel 210 gradually increases from the position close to the second air inlet to the position far from the second air inlet. That is to say, there is a large air velocity difference between the position of the indoor air close to the second air inlet and the position far from the second air inlet in the first heat exchange flow channel 210, resulting in poor heat exchange efficiency of the heat exchanger 200, large flow channel resistance of the first heat exchange flow channel 210, and room for improvement in the energy efficiency of the indirect evaporative cooling unit 20.

[0070] When the distance between the air suction port of the indoor air supply fan 310 and the first air outlet is less than or equal to 2D, the first air outlet can be within the influence range of the negative pressure field generated by the indoor air supply fan 310. When the narrow and long indoor return air duct 110 causes the wind pressure along the second direction received by the first air inlet to gradually decrease from the position close to the second air inlet to the position far from the second air inlet, through the influence of the negative pressure field generated by the indoor air supply fan 310, the air velocity of the indoor air in the first heat exchange flow channel 210 can be made more balanced from the position close to the second air inlet to the position far from the second air inlet. Furthermore, the heat exchanger 200 can have a high heat exchange efficiency, and the flow channel resistance of the first heat exchange flow channel 210 is small, enabling the indirect evaporative cooling unit 20 to have a high energy efficiency.

[0071] The indoor air supply fan 310 is located in the indoor air supply duct 120.

[0072] Exemplarily, the indoor air supply fan 310 may include a wind guiding ring. At this time, the diameter of the air suction port of the indoor air supply fan 310 is the inner diameter at the air inlet of the wind guiding ring.

[0073] Exemplarily, the indoor air supply fan 310 may be arranged parallel to the side of the heat exchanger 200 having the first air outlet, or may be arranged obliquely to the side of the heat exchanger 200 having the first air outlet.

[0074] Exemplarily, the indoor air supply fan 310 may be fixedly connected to at least one of the chassis 100 and the heat exchanger 200.

[0075] In some possible embodiments, the distance between the air suction port and the first air outlet of the indoor air supply fan 310 is greater than or equal to 0.5D and less than or equal to D.

[0076] In this way, the negative pressure field generated by the indoor air supply fan 310 can affect the static pressure in a large area of the first air outlet, which is beneficial to reducing the number of indoor air supply fans 310 and improving the energy efficiency of the indirect evaporative cooling unit 20. In addition, the first air outlet is located at a position with a stronger pressure in the negative pressure field generated by the indoor air supply fan 310, which is beneficial to controlling the air velocity in the first heat exchange flow path 210 through the indoor air supply fan 310. In addition, it is also convenient to arrange components such as the cooling device 410 between the indoor air supply fan 310 and the first air outlet, which is beneficial to improving the cooling capacity of the indirect evaporative cooling unit 20.

[0077] In some possible embodiments, the indirect evaporative cooling unit 20 includes a plurality of indoor air supply fans 310 arranged along the first direction.

[0078] In this way, it is beneficial to drive the indoor air to flow more evenly at various positions along the first direction of the first air outlet. By adjusting the rotation speeds of the indoor air supply fans 310 at different positions in the first direction, the static pressure at various positions along the first direction of the first air outlet can be adjusted, so that the static pressure at the position of the first air outlet close to the second air inlet is smaller, and the static pressure at the position of the first air outlet far from the second air inlet is larger. Furthermore, the pressure drop at various positions along the first direction of the first heat exchange flow path 210 can be made more balanced, so that the air velocity at various positions along the first direction of the first heat exchange flow path 210 is more balanced, which can further improve the heat exchange efficiency of the heat exchanger 200, reduce the flow path resistance of the first heat exchange flow path 210, and further improve the energy efficiency of the indirect evaporative cooling unit 20.

[0079] The rotation speeds of the indoor air supply fans 310 at different positions in the first direction can be independently controlled.

[0080] Exemplarily, the projection of the indoor air supply fan 310 along the second direction is located within the projection of the first air outlet along the second direction.

[0081] Exemplarily, the first air outlet has a plurality of air outlet regions arranged along the first direction. Each indoor air supply fan 310 corresponds to one air outlet region. The indoor air supply fan 310 is disposed opposite to the corresponding air outlet region, and the indoor air supply fan 310 sucks air towards the corresponding air outlet region.

[0082] Exemplarily, the projection of the indoor air supply fan 310 along the second direction is located within the projection of the corresponding air outlet area along the second direction.

[0083] In some possible embodiments, the indoor return air duct 110 and the indoor air supply duct 120 are respectively located on both sides of the heat exchanger 200 in the second direction, and both the indoor return air duct 110 and the indoor air supply duct 120 extend along the first direction. At least one side of the chassis 100 in the first direction has a second air inlet, and the second air inlet is opposite to the indoor return air duct 110 in the first direction. At least one side of the chassis 100 in the first direction has a second air outlet, and the second air outlet is opposite to the indoor air supply duct 120 in the first direction. The indoor return air duct 110 is adjacent to the side of the heat exchanger 200 having the first air inlet, and the side of the indoor return air duct 110 facing the first air inlet along the second direction is communicated with the first air inlet. The indoor air supply duct 120 is adjacent to the side of the heat exchanger 200 having the first air outlet, and the side of the indoor air supply duct 120 facing the first air outlet along the second direction is communicated with the first air outlet.

[0084] In this way, the flow path of the indoor air in the indirect evaporative cooling unit 20 is shorter and the number of turns is less, which can make the resistance of the indoor air in the indirect evaporative cooling unit 20 smaller, and is beneficial to improving the energy efficiency of the indirect evaporative cooling unit 20.

[0085] In some examples, both sides of the chassis 100 in the first direction have second air inlets.

[0086] In some other examples, one side of the chassis 100 in the first direction has a second air inlet, and the other side of the chassis 100 in the first direction does not have a second air inlet.

[0087] In some examples, both sides of the chassis 100 in the first direction have second air outlets.

[0088] In some other exemplary embodiments, one side of the chassis 100 in the first direction has a second air outlet, and the other side of the chassis 100 in the first direction does not have a second air outlet.

[0089] In some possible embodiments, the indoor air supply fan 310 is a centrifugal fan.

[0090] In this way, compared with the scheme of using an axial flow fan for the indoor air supply fan 310, the air blown by the centrifugal fan has fewer turning times and less flow channel resistance when flowing to the second air outlet, which is beneficial to improving the energy efficiency of the indirect evaporative cooling unit 20.

[0091] In some possible embodiments, an indoor return air filter 500 is provided at the first air inlet, and the indoor return air filter 500 is fixedly connected to the heat exchanger 200.

[0092] In this way, the indoor return air filter 500 can filter the sundries entrained by the indoor air, so that components such as the downstream heat exchanger 200 and the indoor air supply fan 310 are not easily damaged by the sundries entrained by the indoor air. In addition, compared with the scheme of arranging the indoor return air filter 500 at the second air inlet, arranging the indoor return air filter 500 at the first air inlet can make the resistance of the indoor air flowing through the indirect evaporative cooling unit 20 smaller, which is beneficial to improving the energy efficiency of the indirect evaporative cooling unit 20.

[0093] In some possible implementation manners, the cooling air inlet air duct 130 is located below the heat exchanger 200, the indoor return air duct 110, and the indoor air supply duct 120, and the third air inlet is located below the heat exchanger 200, the indoor return air duct 110, and the indoor air supply duct 120. The cooling air outlet air duct 140 is located above the heat exchanger 200, the third air outlet is located above the heat exchanger 200, the indoor return air duct 110, and the indoor air supply duct 120, the fourth air inlet is located on the bottom side of the heat exchanger 200, and the fourth air outlet is located on the top side of the heat exchanger 200.

[0094] In this way, the relatively high-temperature cooling air flowing out from the third air outlet is not easily affected by the cooling air flowing into the indirect evaporative cooling unit 20 from the third air inlet. In addition, the flow path of the cooling air in the indirect evaporative cooling unit 20 is shorter and the number of corners is less, which is also beneficial to improving the energy efficiency of the indirect evaporative cooling unit 20.

[0095] In some possible implementation manners, at least one side of the chassis 100 in the second direction has a third air inlet, and the third air inlet located on one side of the chassis 100 in the second direction is opposite to the cooling air inlet air duct 130 in the second direction.

[0096] In this way, the size of the third air inlet can be made larger, which is beneficial to increasing the intake air volume of the cooling air.

[0097] In some examples, both sides of the chassis 100 in the second direction have a third air inlet.

[0098] In some other examples, one side of the chassis 100 in the second direction has a third air inlet, and the other side of the chassis 100 in the second direction does not have a third air inlet.

[0099] In some possible implementation manners, at least one side of the chassis 100 in the first direction has a third air inlet, and the third air inlet located on one side of the chassis 100 in the first direction is opposite to the cooling air inlet air duct 130 in the first direction.

[0100] In some examples, the indirect evaporative cooling unit 20 further includes a cooling air driving fan 320. The cooling air driving fan 320 is disposed downstream of the fourth air outlet along the flowing direction of the cooling air. For example, the cooling air driving fan 320 may be disposed above the fourth air outlet. The cooling air driving fan 320 is configured to suck air toward the fourth air outlet so as to drive the cooling air to flow within the indirect evaporative cooling unit 20.

[0101] The cooling air driving fan 320 is located within the cooling air outlet air duct 140.

[0102] Exemplarily, the cooling air driving fan 320 may be an axial flow fan, and the top side of the chassis 100 may have a third air outlet.

[0103] In some examples, a cooling air inlet filter is provided at the third air inlet, and the cooling air inlet filter is fixedly connected to the chassis 100.

[0104] In this way, the cooling air inlet filter can filter the debris entrained by the cooling air, so that components such as the downstream heat exchanger 200 and the cooling air driving fan 320 are not easily damaged due to the debris entrained by the cooling air. In addition, the cooling air inlet filter is provided at the third air inlet and is fixedly connected to the chassis 100, so that the cooling air inlet filter is conveniently arranged and is conducive to removing the debris at the cooling air inlet filter outside the chassis 100.

[0105] In some possible implementation manners, the multiple partition plates of the chassis 100 include a first partition plate 150. The first partition plate 150 is configured to form the air duct wall at the bottom side of the indoor air supply air duct 120 and the air duct wall at the top side of the cooling air inlet air duct 130. That is to say, the first partition plate 150 can be used to separate the indoor air supply air duct 120 and the cooling air inlet air duct 130.

[0106] In some possible implementation manners, the multiple partition plates of the chassis 100 include a second partition plate 160. The second partition plate 160 is configured to form the air duct wall at the bottom side of the indoor air return air duct 110 and the air duct wall at the top side of the cooling air inlet air duct 130. That is to say, the second partition plate 160 can be used to separate the indoor air return air duct 110 and the cooling air inlet air duct 130.

[0107] Exemplarily, the first partition plate 150 and the second partition plate 160 may be horizontal plates at the same height.

[0108] In some possible implementation manners, the indirect evaporative cooling unit 20 further includes a cooling device 410. The cooling device 410 is disposed between the indoor air supply fan 310 and the first air outlet. The cooling device 410 is configured to cool the indoor air flowing out from the first air outlet.

[0109] In this way, the indoor air flowing out of the indirect evaporative cooling unit 20 can be cooled by cooling the device 410, which is beneficial to improving the cooling capacity of the indirect evaporative cooling unit 20.

[0110] When the cooling device 410 is arranged between the indoor air supply fan 310 and the first air outlet, and the first air outlet is located on one side of the heat exchanger 200 in the second direction, it is also beneficial to arrange a cooling device 410 with a larger size, which is beneficial to improving the cooling capacity of the indirect evaporative cooling unit 20.

[0111] In some possible embodiments, the indirect evaporative cooling unit 20 includes a refrigerant circulation system. The refrigerant circulation system includes a compressor, a condenser 420, a throttling device and an evaporator. The outlet end of the compressor is communicated with the refrigerant inlet end of the condenser 420. The refrigerant outlet end of the condenser 420 is communicated with the inlet end of the throttling device. The outlet end of the throttling device is communicated with the refrigerant inlet end of the evaporator. The refrigerant outlet end of the evaporator is communicated with the inlet end of the compressor. After the refrigerant compressed in the compressor flows out from the outlet end of the compressor and sequentially flows through the condenser 420, the throttling device and the evaporator, it flows back to the compressor. At this time, the cooling device 410 is the evaporator.

[0112] Exemplarily, the condenser 420 is arranged above the fourth air outlet. The condenser 420 is located between the cooling air driving fan 320 and the fourth air outlet. The condenser 420 is arranged in the cooling air outlet duct 140.

[0113] In some other possible embodiments, the cooling device 410 can be a surface cooler.

[0114] In some possible embodiments, the indirect evaporative cooling unit 20 further includes a spraying assembly 430. The spraying assembly 430 is arranged above the fourth air outlet. The spraying assembly 430 is located between the fourth air outlet and the cooling air driving fan 320. The spraying assembly 430 is used for spraying towards the fourth air outlet.

[0115] In this way, it is convenient to spray the cooling air in the second heat exchange flow path 220 into wet cold air, which is beneficial to improving the refrigeration efficiency of the indoor air.

[0116] When the condenser 420 is arranged above the fourth air outlet, the spraying assembly 430 is arranged between the condenser 420 and the fourth air outlet. That is to say, the spraying assembly 430 is arranged below the condenser 420.

[0117] In some examples, the indirect evaporative cooling unit 20 further includes a water receiving tray 450. The water receiving tray 450 can be arranged in the cooling air inlet duct 130. The water receiving tray 450 is arranged below the fourth air inlet. The water receiving tray 450 is used for receiving the sprayed water flowing out of the fourth air inlet.

[0118] In this way, the water receiving tray 450 can collect the sprayed water flowing out from the fourth air inlet, and it is not easy to cause problems such as personal injury or equipment damage due to the random flow of the sprayed water.

[0119] In some examples, the indirect evaporative cooling unit 20 further includes a water baffle 440. The water baffle 440 is disposed between the spraying assembly 430 and the cooling air driving fan 320. The water baffle 440 is used to block the sprayed water from flowing towards the cooling air driving fan 320. The cooling air flowing out from the fourth air outlet can flow towards the cooling air driving fan 320 through the water baffle 440. That is to say, the gaseous medium can pass through the water baffle 440, while the liquid medium cannot pass through the water baffle 440.

[0120] When a condenser 420 is disposed above the fourth air outlet, the water baffle 440 can be disposed between the spraying assembly 430 and the condenser 420. That is to say, the water baffle 440 is located above the spraying assembly 430 and below the condenser 420.

[0121] In some examples, the indirect evaporative cooling unit 20 may further include an electric control box. The electric control box can be disposed below the heat exchanger 200, the indoor return air duct 110 and the indoor supply air duct 120. The electric control box can be located on one side of the chassis 100 in the first direction.

[0122] Figure 6 For Figure 5 the enlarged view of part A in

[0123] As Figure 6 shown, in some possible implementation manners, the cooling device 410 is fixedly connected to the heat exchanger 200, and the indoor supply air fan 310 is fixedly connected to the cooling device 410 through a connecting frame 312.

[0124] In this way, it is convenient to fix the cooling device 410 and the indoor supply air fan 310 at the first air outlet. In addition, through the connecting frame 312, the indoor supply air fan 310 can be fixed at a position spaced apart from the cooling device 410, which is beneficial to the indoor supply air fan 310 to suck the indoor air flowing out from the cooling device 410, and the air suction efficiency of the indoor supply air fan 310 is relatively high.

[0125] Exemplarily, the indoor supply air fan 310 is fixedly connected to the upper edge of the cooling device 410 through the connecting frame 312, so that the connecting frame 312 has a relatively small air resistance to the indoor air flowing out from the cooling device 410.

[0126] In some possible implementation manners, the indoor supply air fan 310 is fixedly connected to the first partition 150 through a support frame 311.

[0127] In this way, it is convenient to fix the indoor supply air fan 310 at the first air outlet.

[0128] The upper end of the indoor air supply fan 310 is fixed to the cooling device 410 through the connecting frame 312, and the lower end of the indoor air supply fan 310 is fixed to the first partition 150 through the support frame 311, which can make the installation of the indoor air supply fan 310 more stable.

[0129] In some examples where the indirect evaporative cooling unit 20 does not include the cooling device 410, the indoor air supply fan 310 can also be fixedly connected to the heat exchanger 200 through the mounting frame.

[0130] Figure 7 It is a schematic diagram of the flow of indoor air in an indirect evaporative cooling unit provided by an embodiment of the present application. Figure 7 The direction of the dashed arrow in indicates the flow direction of the indoor air. In Figure 7 , one side of the chassis 100 in the first direction has a second air inlet, and the other side of the chassis 100 in the first direction has a second air outlet. As Figure 7 shown, after the indoor air flows into the indoor return air duct 110 from the second air inlet along the first direction, it turns at the first air inlet and flows through the first heat exchange flow channel 210 along the second direction, then enters the indoor air supply duct 120, and then flows out of the indirect evaporative cooling unit 20 from the second air outlet along the first direction.

[0131] Figure 8 It is a schematic diagram of the flow of cooling air in an indirect evaporative cooling unit provided by an embodiment of the present application. Figure 8 The direction of the dashed arrow in indicates the flow direction of the cooling air. In Figure 8 , one side of the chassis 100 in the second direction has a third air inlet, and the top side of the chassis 100 has a third air outlet. As Figure 8 shown, after the cooling air flows into the cooling air inlet duct 130 from below the heat exchanger 200 along the second direction, it turns at the fourth air inlet and flows upward through the second heat exchange flow channel 220, then enters the cooling air outlet duct 140, and then flows out of the indirect evaporative cooling unit 20 upward from the third air outlet.

[0132] Figure 9 It is a schematic diagram of another indirect evaporative cooling unit provided by an embodiment of the present application.

[0133] As Figure 9 shown, in some examples, one side of the chassis 100 in the first direction has a second air inlet, the other side of the chassis 100 in the first direction does not have a second air inlet, one side of the chassis 100 in the first direction has a second air outlet, the other side of the chassis 100 in the first direction does not have a second air outlet, and the second air inlet and the second air outlet are located on the same side of the chassis 100 in the first direction. In this way, it is convenient to arrange the indirect evaporative cooling unit 20 on the side of the side wall of the machine room 10.

[0134] In some other examples, one side of the chassis 100 in the first direction has a second air inlet, the other side of the chassis 100 in the first direction does not have a second air inlet, one side of the chassis 100 in the first direction has a second air outlet, the other side of the chassis 100 in the first direction does not have a second air outlet, and the second air inlet and the second air outlet are located on different sides of the chassis 100 in the first direction. At this time, the indirect evaporative cooling unit 20 can be arranged on the top of the computer room 10.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An indirect evaporative cooling unit (20), characterized in that: It comprises a chassis (100), a heat exchanger (200) and an indoor air supply fan (310); The heat exchanger (200) is arranged in the chassis (100), and both ends of the heat exchanger (200) in the length direction extend along a first direction; The heat exchanger (200) comprises a first heat exchange channel (210) and a second heat exchange channel (220), wherein the first heat exchange channel (210) is used for indoor air to flow through, and the second heat exchange channel (220) is used for cooling air to flow through, and the heat exchanger (200) is used for enabling indoor air in the first heat exchange channel (210) to perform heat exchange with cooling air in the second heat exchange channel (220); The heat exchanger (200) has a first air inlet and a first air outlet on both sides in the second direction, and both ends of the first heat exchange channel (210) are respectively connected to the first air inlet and the first air outlet; The indoor air supply fan (310) is arranged downstream of the first air outlet along the indoor air flow direction, and the indoor air supply fan (310) is used to suck air toward the first air outlet; The first direction is the length direction of the chassis (100), and the second direction is the width direction of the chassis (100).

2. The indirect evaporative cooling unit (20) according to claim 1, characterized in that: The diameter of the air intake port of the indoor air supply fan (310) is D, and the distance between the air intake port of the indoor air supply fan (310) and the first air outlet is less than or equal to 2D.

3. The indirect evaporative cooling unit (20) according to claim 2, characterized in that: The distance between the air intake port of the indoor air supply fan (310) and the first air outlet is greater than or equal to 0.5D and less than or equal to D.

4. The indirect evaporative cooling unit (20) according to claim 1, characterized in that: The indirect evaporative cooling unit (20) comprises a plurality of indoor air supply fans (310) arranged along the first direction.

5. The indirect evaporative cooling unit (20) according to claim 1, characterized in that: The chassis (100) has an indoor return air duct (110) and an indoor supply air duct (120), the indoor return air duct (110) and the indoor supply air duct (120) are respectively located on both sides of the heat exchanger (200) in the second direction, and the indoor return air duct (110) and the indoor supply air duct (120) both extend along the first direction; The chassis (100) has a second air inlet on at least one side in the first direction, the second air inlet is opposite to the indoor return air duct (110) in the first direction, and the second air inlet is connected to the indoor return air duct (110); The chassis (100) has a second air outlet on at least one side in the first direction, the second air outlet is opposite to the indoor air supply duct (120) in the first direction, and the second air outlet is connected to the indoor air supply duct (120); The indoor return air duct (110) is adjacent to a side of the heat exchanger (200) having the first air inlet, and the indoor return air duct (110) is connected to the first air inlet along the second direction on a side facing the first air inlet; The indoor air supply duct (120) is adjacent to a side of the heat exchanger (200) having the first air outlet, the indoor air supply duct (120) is connected to the first air outlet along the second direction toward a side of the first air outlet, and the indoor air supply fan (310) is located in the indoor air supply duct (120).

6. The indirect evaporative cooling unit (20) according to claim 5, characterized in that: The indoor air supply fan (310) is a centrifugal fan.

7. The indirect evaporative cooling unit (20) according to claim 5, characterized in that: The chassis (100) comprises a first partition plate (150), wherein the first partition plate (150) is used to form an air duct wall at the bottom side of the indoor air supply duct (120), and the indoor air supply fan (310) is fixedly connected to the first partition plate (150) via a support frame (311).

8. The indirect evaporative cooling unit (20) according to claim 5, characterized in that: The chassis (100) also has a cooling air inlet duct (130) and a cooling air outlet duct (140); The cooling air inlet duct (130) is located below the heat exchanger (200), the indoor return air duct (110) and the indoor supply air duct (120), and the cooling air outlet duct (140) is located above the heat exchanger (200); The chassis (100) has a third air inlet on at least one side in the second direction, the third air inlet is opposite to the cooling air inlet duct (130) in the second direction, and the third air inlet is in communication with the cooling air inlet duct (130); The chassis (100) further comprises a third air outlet, the third air outlet being located above the heat exchanger (200), the indoor return air duct (110) and the indoor supply air duct (120), and the third air outlet being in communication with the cooling air outlet duct (140); The heat exchanger (200) also has a fourth air inlet and a fourth air outlet, and the two ends of the second heat exchange channel (220) are respectively connected to the fourth air inlet and the fourth air outlet, the fourth air inlet is located on the bottom side of the heat exchanger (200) and is connected to the cooling air inlet duct (130), and the fourth air outlet is located on the top side of the heat exchanger (200) and is connected to the cooling air outlet duct (140).

9. The indirect evaporative cooling unit (20) according to any one of claims 1 to 8, characterized in that: An indoor return air filter (500) is provided at the first air inlet, and the indoor return air filter (500) is fixedly connected to the heat exchanger (200).

10. The indirect evaporative cooling unit (20) according to any one of claims 1 to 8, characterized in that: Also comprising a cooling device (410); The cooling device (410) is arranged between the indoor air supply fan (310) and the first air outlet, and the cooling device (410) is used to cool the indoor air flowing out of the first air outlet; The cooling device (410) is fixedly connected to the heat exchanger (200), and the indoor air supply fan (310) is fixedly connected to the cooling device (410) via a connecting frame (312).

Images