Air supply device and refrigerating system

Abstract

The invention discloses an air supply device and a refrigerating system, and relates to the technical field of heat exchange equipment. The air supply device comprises a static pressure box, a fan mounting wall and a fan. The static pressure box is provided with a static pressure air cavity used for being arranged on the outer side of the heat exchange unit so that an inlet of the static pressure air cavity can be connected to an air outlet of the heat exchange unit in a communicating mode. The fan mounting wall is arranged at an outlet of the static pressure box; the fans are arranged on the fan mounting wall, cooling air is received through the static pressure box and exhausted into the machine room, the heat removal effect on the machine room is effectively improved through the air supply device, the air supply device is externally arranged in the refrigerating system, the mounting space of the air supply device is not limited, the air supply device with a larger size can be mounted, and the air supply device is convenient to mount and maintain. Therefore, the heat removal effect can be further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and more specifically, to an air supply device. In addition, the present invention also relates to a refrigeration system including the air supply device. Background Art

[0002] With the development of computing servers, the heat density in the computer room continues to increase. Existing indirect evaporative cooling units usually install fans inside the casing and reserve some air supply channels inside the casing to receive the gas pushed by the fan after the heat exchange core is cooled. Finally, the gas is sent into the computer room through the air supply port opened on the side wall of the casing. However, the cooling capacity of a single indirect evaporative cooling unit is limited by the size of the air supply port arranged by itself. In actual use, the air supply speed sent to the computer room is too high, which will cause problems such as uneven airflow organization and local hot spots, thereby affecting the overall heat dissipation effect of the computer room and increasing the cooling energy consumption of the computer room.

[0003] In summary, how to improve the heat dissipation effect of a computer room is a problem that currently needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] In view of this, an object of the present invention is to provide an air supply device, which can effectively improve the heat exhaust effect of a machine room.

[0005] Another object of the present invention is to provide a refrigeration system comprising the above-mentioned air supply device.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An air supply device comprises a static pressure box, a fan installation wall and a fan;

[0008] The static pressure box has a static pressure air cavity, which is used to be arranged outside the heat exchange unit so that the inlet of the static pressure air cavity is conductively connected to the air outlet of the heat exchange unit;

[0009] The fan installation wall is arranged at the outlet of the static pressure box;

[0010] A plurality of the fans are arranged on the fan installation wall.

[0011] Preferably, the cross-sectional size of the static pressure air cavity gradually increases from the inlet of the static pressure box to the outlet of the static pressure box.

[0012] Preferably, the plurality of fans are evenly arranged on the fan installation wall, and the distribution area of ​​the plurality of fans is larger than the cross-sectional area of ​​the inlet of the static pressure box.

[0013] Preferably, the bottom surface of the static pressure box is a plane, the top surface of the static pressure box is a curved surface, the length of the static pressure box is smaller than the radius of curvature of the top surface of the static pressure box, and the length of the static pressure box is the vertical distance between the inlet and outlet of the static pressure box.

[0014] Preferably, a guide plate is provided inside the static pressure box to divide the static pressure air cavity into a plurality of air ducts, the first ends of the plurality of air ducts are connected to the air outlet, and the plurality of fans are opposite to the second end outlets of the corresponding air ducts to pump the cooling gas in the corresponding air ducts.

[0015] Preferably, the guide plates are arranged in sequence along the height direction of the static pressure box, the guide plates have a guide angle with the length direction of the static pressure box, and the guide angles decrease in sequence from top to bottom.

[0016] Preferably, the guide plate located at the bottom has a plurality of through holes along its own thickness direction.

[0017] Preferably, the inlet of the static pressure box is sealed and connected to the air outlet of the heat exchange unit.

[0018] A refrigeration system comprises a heat exchange unit and also comprises an air supply device as described in any one of the above items.

[0019] Preferably, the casing of the heat exchange unit has a return air channel, an air supply channel, a heat exchange air inlet channel and a heat exchange air outlet channel, and a heat exchange core is arranged in the inner cavity of the casing, and the casing wall of the casing has a return air port, an air outlet, a heat exchange air inlet and a heat exchange air outlet;

[0020] The return air port, the return air channel, the internal cooling channel of the heat exchange core, the air supply channel and the air outlet are connected in sequence;

[0021] The heat exchange air inlet, the heat exchange air inlet channel, the internal heat exchange channel of the heat exchange core, the heat exchange air outlet channel and the heat exchange air outlet are connected in sequence;

[0022] The air outlet comprises an air supply port and an air expansion port, wherein the air supply port is located at the bottom of the heat exchange core, the air expansion port is located at the side of the heat exchange core, and the inlet of the static pressure box is sealed and connected to the air outlet.

[0023] In the present invention, the heat exchange unit is a component that can extract gas from the outside and cool the gas through the heat exchange core and then transport it back to the outside. During this process, the gas flows through the return air port, the return air channel, the internal cooling channel of the heat exchange core, the air supply channel, and the air supply port in sequence.

[0024] The beneficial effect lies in that, a static pressure box is arranged outside the heat exchanger unit, a static pressure air cavity is opened inside the static pressure box, and the first end inlet of the static pressure air cavity is connected with the air supply port, so that the cooling gas delivered by the heat exchanger unit can be discharged into the static pressure air cavity; the fan installation wall and the static pressure box seal are matched, and the fan installation wall is located at the second end of the static pressure air cavity with an outlet, and a plurality of fans are arranged on the fan installation wall, so that the cooling gas in the static pressure air cavity can be extracted and discharged to the outside of the static pressure box through the fans. Since the gas cooled by the heat exchanger unit is discharged through the static pressure box, when in use, the fan installation wall is set on the wall inserted in the computer room, or the fan installation wall is set inside, etc., and the cooling gas is blown into the computer room evenly and directly by the fan on the fan installation wall. Compared with the related art, the heat exhaust effect of the computer room is effectively improved by using the air supply device, and since the air supply device is placed outside the refrigeration system, the installation space of the air supply device is not limited, and a larger air supply device can be installed, thereby further improving the heat exhaust effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the principle of a specific embodiment provided by the present invention;

[0027] Figure 2 A schematic diagram of the structure of a specific embodiment provided by the present invention;

[0028] Figure 3 Another schematic diagram of the principle of a specific embodiment provided by the present invention;

[0029] Figure 4 Another structural schematic diagram of a specific embodiment provided by the present invention;

[0030] Figure 5 It is another structural schematic diagram of a specific embodiment provided by the present invention;

[0031] Figure 6 for Figure 2 A partial schematic diagram of

[0032] Figure 7 for Figure 2 Another partial schematic diagram of .

[0033] Reference numerals:

[0034] 1-heat exchange unit; 11-housing; 111-air outlet; 1111-air supply outlet; 1112-air expansion outlet; 12-return air channel; 13-heat exchange core; 14-air supply channel; 15-heat exchange air inlet channel; 16-heat exchange air outlet channel;

[0035] 2-static pressure box; 21-static pressure air chamber;

[0036] 3- Fan installation wall;

[0037] 4- fan;

[0038] 5-Deflector. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The core of the present invention is to provide an air supply device, which can effectively improve the heat removal effect of the machine room. Another core of the present invention is to provide a refrigeration system including the air supply device.

[0041] Please refer to Figure 1 The present invention provides an air supply device, including a static pressure box 2, a fan installation wall 3 and a fan 4; the static pressure box 2 has a static pressure air cavity 21, which is used to be arranged on the outside of the heat exchanger unit 1, so that the inlet of the static pressure air cavity 21 is connected to the air outlet 111 of the heat exchanger unit 1; the fan installation wall 3 is arranged at the outlet of the static pressure box 2; and a plurality of fans 4 are arranged on the fan installation wall 3.

[0042] like Figures 1 to 7 As shown, a static pressure box 2 is arranged outside the heat exchanger unit 1, and a channel with a circular or rectangular cross-sectional shape is opened inside the static pressure box 2 as a static pressure air cavity 21. The left end inlet of the static pressure air cavity 21 is connected to the air outlet 111, so that the cooling gas delivered by the heat exchanger unit 1 can be discharged into the static pressure air cavity 21; the fan installation wall 3 and the static pressure box 2 are sealed together, and the fan installation wall 3 can adopt a plate structure in a circular or rectangular shape, and the fan installation wall 3 is located at the right end of the static pressure air cavity 21 with an outlet, and a plurality of fans 4 are arranged on the fan installation wall 3, and the fans 4 and the fan installation wall 3 together form a wind wall, so that the cooling gas in the static pressure air cavity 21 can be extracted and discharged to the outside of the static pressure box 2 through the fans 4.

[0043] It should be noted that the layout of the fans 4 is not limited as long as the cooling gas can be discharged evenly. In some specific embodiments, the fans 4 are arranged in a matrix manner. In some specific embodiments, the fans 4 are arranged in a concentric circle manner, that is, the fans 4 are arranged with the same center point to form a number of circles, and the fans 4 in each circle are evenly arranged around the center point.

[0044] Since the gas cooled by the heat exchanger unit 1 is received by the static pressure box 2, when in use, the fan installation wall 3 can be inserted into the wall of the machine room, or can be built inside the machine room, etc., and the cooling gas in the static pressure air cavity 21 is blown into the machine room evenly and directly by the fan 4 on the fan installation wall 3. Compared with the related art, the heat dissipation effect of the machine room is effectively improved by using the air supply device, and since the air supply device is external to the refrigeration system, the installation space of the air supply device is not limited, and a larger air supply device can be installed, thereby further improving the heat dissipation effect.

[0045] On the basis of the above-mentioned embodiment, the cross-sectional size of the static pressure air cavity 21 gradually increases from the inlet of the static pressure box 2 to the outlet of the static pressure box 2, so that the flow rate of the received cooling gas is reduced and the static pressure is increased, thereby achieving static pressure and helping to reduce noise.

[0046] On the basis of the above embodiment, a plurality of fans 4 are evenly arranged on the fan installation wall 3, and the distribution area of ​​the plurality of fans 4 is larger than the cross-sectional area of ​​the inlet of the static pressure box 2, such as Figure 2 As shown, the cross-sectional area of ​​the inlet of the static pressure box 2 is smaller than the cross-sectional area of ​​the outlet of the static pressure box 2. In order to evenly discharge the cooling gas in the static pressure box 2, a number of evenly arranged fans 4 are arranged on the fan installation wall 3, and the distribution area of ​​the fans 4 is larger than the cross-sectional area of ​​the inlet of the static pressure box 2, so that the cooling gas in the static pressure box 2 can be pumped more evenly. Such an arrangement effectively increases the output area of ​​the cooling gas, which is beneficial to further improve the heat exhaust effect of the computer room, and is beneficial to reduce the cooling energy consumption of the computer room, reduce the PUE value of the data center, and the ratio of all energy consumed by the data center to the energy consumed by the IT load, and the air supply device can achieve a higher heat flux density load.

[0047] Based on the above embodiment, the static pressure air cavity 21 extends along the length direction of the static pressure box 2, and the static pressure box 2 has an end contour curve of the outlet, and the angle between any point and the length direction of the static pressure box 2 is less than or equal to 22.5 degrees.

[0048] The angle between the two sides of the static pressure air cavity 21 outlet along the height direction of the static pressure box 2 and part or all of the two sides along the width direction of the static pressure box 2 and the length direction of the static pressure box 2 is less than or equal to 22.5 degrees. For example, in some specific embodiments, Figure 7As shown, the static pressure air cavity 21 extends in the transverse direction, and an angle β1 is formed between the upper longitudinal side and the transverse direction of the right end opening of the static pressure air cavity 21, and an angle β2 is formed between the outer vertical side and the transverse direction of the right end opening of the static pressure air cavity 21. Such an arrangement is beneficial to reducing the flow resistance of the cooling gas, so as to reduce the energy loss in the cooling gas discharge process.

[0049] like Figure 6 As shown, on the basis of the above-mentioned embodiment, the bottom surface of the static pressure box 2 is a plane, the top surface of the static pressure box 2 is an arc surface, the length D of the static pressure box 2 is less than the curvature radius R of the top surface of the static pressure box 2, and the length D of the static pressure box 2 is the vertical distance between the inlet and the outlet of the static pressure box 2. With such an arrangement, the structure of the static pressure box 2 is simple, and it is beneficial to improve the stability of the air supply device and to reduce the flow resistance of the cooling gas.

[0050] On the basis of the above-mentioned embodiment, a guide plate 5 is provided inside the static pressure box 2 to divide the static pressure air chamber 21 into a plurality of air ducts, the first ends of the plurality of air ducts are all connected to the air outlet 111, and the plurality of fans 4 are opposite to the second end outlets of the corresponding air ducts to pump the cooling gas in the corresponding air ducts.

[0051] like Figure 5 As shown, a guide plate 5 is provided inside the air supply channel 14. The guide plate 5 may be a plate structure such as an arc plate or a flat plate, and the left end of the guide plate 5 extends to the left side of the static pressure air cavity 21, and the right end of the guide plate 5 extends to the right side of the static pressure air cavity 21, so that the static pressure air cavity 21 is divided into at least two air ducts by the guide plate 5, so that the gas discharged from the heat exchanger unit 1 can flow into the corresponding air duct, and the cooling gas in each air duct is extracted through the fan 4, and the cooling gas discharged into the static pressure air cavity 21 can be guided by the guide plate 5 to reduce the ventilation resistance.

[0052] It should be noted that the arrangement of the guide plates 5 is not limited as long as the guide function can be achieved. For example, the guide plates 5 are arranged vertically or laterally.

[0053] On the basis of the above embodiment, a plurality of guide plates 5 are arranged in sequence along the height direction of the static pressure box 2, and the guide plates 5 and the length direction of the static pressure box 2 have a guide angle, and the guide angles decrease from top to bottom. It should be noted that the above "length direction" refers to the vertical connection direction between the inlet and outlet of the static pressure box 2. Specifically, Figure 5 In the illustrated embodiment, the above-mentioned “length direction” refers to the transverse direction.

[0054] It is suitable for embodiments in which the bottom surface of the static pressure box 2 is a flat surface, the top surface is a curved surface, and the static pressure box 2 adopts a thin shell structure, such as Figure 5As shown, compared with the left end of the guide plate 5, the right end of the guide plate 5 is inclined upward, that is, the guide plate 5 has a guide angle α with the horizontal direction, and from top to bottom, the guide angle α between each guide plate 5 and the horizontal direction gradually decreases, so that the guide angle α between the top guide plate 5 and the horizontal direction is the largest, and the guide angle α between the bottom guide plate 5 and the horizontal direction is the smallest, so as to guide the smooth flow of gas.

[0055] On the basis of the above embodiment, the guide plate 5 at the bottom has a plurality of through holes along its thickness direction, such as Figure 5 As shown, a plurality of guide plates 5 are arranged in sequence along the vertical direction, and a plurality of through holes, such as round holes or elliptical holes, are provided on the guide plate 5 located at the bottom to prevent local turbulence from being formed.

[0056] On the basis of the above-mentioned embodiment, the inlet of the static pressure box 2 is sealed and connected to the air outlet 111 of the heat exchange unit 1; Figure 4 As shown, the end wall at the left end of the static pressure box 2 is sealed with the heat exchanger unit 1, and the air outlet 111 of the heat exchanger unit 1 is covered inside it. At this time, the left end inlet of the static pressure air cavity 21 is opposite to and connected with the air outlet 111, and the structure of the air supply device is simple.

[0057] On the basis of the above-mentioned embodiment, the static pressure box 2 and the heat exchanger unit 1 are detachably connected, for example, by bolting or snap-fitting, so as to reduce the difficulty of transportation, assembly and maintenance of the air supply device.

[0058] On the basis of the above-mentioned embodiment, the fan installation wall 3 is a rectangular structure, such as a rectangular plate or a rectangular column structure. Figure 1 and Figure 2 As shown, such an arrangement is helpful to reduce the manufacturing difficulty of the air supply device.

[0059] Furthermore, a plurality of fans 4 are arranged in a matrix, and in the fan 4 matrix, each column of fans 4 is arranged along the height direction of the static pressure box 2, and each row of fans 4 is arranged along the width direction of the static pressure box 2. Such an arrangement is conducive to the positioning and installation of each fan 4.

[0060] In addition to the above-mentioned air supply device, the present invention also provides a refrigeration system including the air supply device disclosed in the above-mentioned embodiment, and also includes a heat exchanger unit 1. For the structures of other parts of the refrigeration system, please refer to the prior art and will not be described in detail herein.

[0061] On the basis of the above-mentioned embodiment, the casing 11 of the heat exchange unit 1 has a return air channel 12, an air supply channel 14, a heat exchange air inlet channel 15 and a heat exchange air outlet channel 16, and a heat exchange core 13 is arranged in the inner cavity of the casing 11, and the shell wall of the casing 11 has a return air port, an air outlet 111, a heat exchange air inlet and a heat exchange air outlet, and the return air port, the return air channel 12, the internal cooling channel of the heat exchange core 13, the air supply channel 14 and The air outlet 111 is connected in sequence, and the heat exchange air inlet, the heat exchange air inlet channel 15, the internal heat exchange channel of the heat exchange core 13, the heat exchange air outlet channel 16 and the heat exchange air outlet are connected in sequence; the air outlet 111 includes an air supply port 1111 and an air expansion port 1112, the air supply port 1111 is located at the bottom of the heat exchange core 13, the air expansion port 1112 is located on the side of the heat exchange core 13, and the inlet of the static pressure box 2 is sealed and connected to the air outlet 111.

[0062] The heat exchange unit 1 is a component that can extract gas from the outside and cool the gas through the heat exchange core 13 and then transport it back to the outside. Figure 1 and Figure 3 As shown, the heat exchange core 13 is arranged in the middle position of the casing 11, and the return air channel 12, the supply air channel 14, the heat exchange air inlet channel 15 and the heat exchange air outlet channel 16 are separated in the inner cavity of the casing 11, and the return air channel 12 is connected to the cooling channel inlet of the heat exchange core 13, the supply air channel 14 is connected to the cooling channel outlet of the heat exchange core 13, the heat exchange air inlet channel 15 is connected to the heat exchange channel inlet of the heat exchange core 13, and the heat exchange air outlet channel 16 is connected to the heat exchange channel outlet of the heat exchange core 13; and four independent openings are opened on the shell wall of the casing 11 as the return air port, the air outlet 111, the heat exchange air inlet and the heat exchange air outlet respectively, the return air port is connected to the return air channel 12, the air outlet 111 is connected to the supply air channel 14, the heat exchange air inlet is connected to the heat exchange air inlet channel 15, and the heat exchange air outlet is connected to the heat exchange air outlet channel 16.

[0063] When in use, the indoor air flows through the return air port, the return air channel 12, the internal cooling channel of the heat exchange core 13, the supply air channel 14, and the air outlet 111 in sequence, so as to extract the indoor air, cool it, and then send it back. At the same time, the outdoor air flows through the heat exchange air inlet, the heat exchange air inlet channel 15, the internal heat exchange channel of the heat exchange core 13, the heat exchange air outlet channel 16 and the heat exchange air outlet in sequence, so as to extract the outdoor air to cool the heat exchange core 13.

[0064] like Figure 3 and Figure 4 As shown, an air supply port 1111 and an air expansion port 1112 are provided on the shell wall of the shell 11, so that the cooling gas in the air supply channel 14 can be discharged to the outside of the heat exchange unit 1 through the air supply port 1111 and the air expansion port 1112. Specifically, as shown in FIG. Figure 4As shown, the air expansion port 1112 is provided on the peripheral wall of the part of the hole of the air supply channel 14 corresponding to the heat exchange core 13, and the air supply port 1111 is provided on the peripheral wall of the part of the hole of the air supply channel 14 located below the heat exchange core 13, and the static pressure air cavity 21 provided inside the static pressure box 2 is connected to the air expansion port 1112 and the air outlet 111, so that part of the cooling gas can flow into the static pressure air cavity 21 through the air expansion port 1112, and the remaining part can flow into the static pressure air cavity 21 through the air supply port 1111. Such an arrangement is conducive to reducing the energy loss of the cooling gas and reducing the flow resistance of the cooling gas; in combination, as Figure 2 As shown, the left end of the static pressure box 2 is sealed and matched with the casing 11, and the air outlet 111 opened in the casing 11 is covered inside it. At this time, the left end inlet of the static pressure air cavity 21 is opposite to and connected with the air outlet 111.

[0065] Of course, the housing 11 is not limited to the scheme of simultaneously providing the air supply port 1111 and the air expansion port 1112 as the air outlet 111. For example, in some specific embodiments, Figure 1 and Figure 2 As shown, the casing 11 is only provided with an air outlet 1111 for the cooling gas to be discharged to the outside of the heat exchange unit 1 .

[0066] It should be noted that the relational terms such as "first" and "second" mentioned above are merely used to distinguish one entity from other entities, and do not necessarily require or imply any actual relationship or order between these entities; the "upper surface, lower surface, top, bottom" and the directional words "upper, lower, left, right" mentioned above are all defined based on the drawings in the specification.

[0067] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0068] The air supply device and refrigeration system provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. An air supply device, characterized in that: It comprises a static pressure box (2), a fan installation wall (3) and a fan (4); The static pressure box (2) has a static pressure air cavity (21) and is arranged outside the heat exchange unit (1) so that the inlet of the static pressure air cavity (21) is conductively connected to the air outlet (111) of the heat exchange unit (1); The fan installation wall (3) is arranged at the outlet of the static pressure box (2); A plurality of the fans (4) are arranged on the fan installation wall (3).

2. The air supply device according to claim 1, characterized in that: From the inlet of the static pressure box (2) to the outlet of the static pressure box (2), the cross-sectional size of the static pressure air cavity (21) gradually increases.

3. The air supply device according to claim 2, characterized in that: The plurality of fans (4) are evenly arranged on the fan installation wall (3), and the distribution area of ​​the plurality of fans (4) is larger than the cross-sectional area of ​​the inlet of the static pressure box (2).

4. The air supply device according to claim 3, characterized in that: The bottom surface of the static pressure box (2) is a plane, the top surface of the static pressure box (2) is a curved surface, the length of the static pressure box (2) is smaller than the radius of curvature of the top surface of the static pressure box (2), and the length of the static pressure box (2) is the vertical distance between the inlet and the outlet of the static pressure box (2).

5. The air supply device according to claim 4, characterized in that: A guide plate (5) is provided inside the static pressure box (2) to divide the static pressure air cavity (21) into a plurality of air ducts, the first ends of the plurality of air ducts are all connected to the air outlet (111), and the plurality of fans (4) are opposite to the second end outlets of the corresponding air ducts to pump the cooling gas in the corresponding air ducts.

6. The air supply device according to claim 5, characterized in that: The guide plates (5) are arranged in sequence along the height direction of the static pressure box (2), and the guide plates (5) have a guide angle with the length direction of the static pressure box (2), and the guide angles decrease in sequence from top to bottom.

7. The air supply device according to claim 6, characterized in that: The guide plate (5) located at the bottom has a plurality of through holes along its own thickness direction.

8. The air supply device according to claim 7, characterized in that: The inlet of the static pressure box (2) is sealingly connected to the air outlet (111) of the heat exchange unit (1).

9. A refrigeration system, comprising a heat exchange unit (1), characterized in that: It also includes the air supply device according to any one of claims 1 to 8.

10. The refrigeration system according to any one of claims 1 to 7, characterized in that: The casing (11) of the heat exchange unit (1) has a return air passage (12), an air supply passage (14), a heat exchange air inlet passage (15) and a heat exchange air outlet passage (16) inside, and a heat exchange core (13) is arranged in the inner cavity of the casing (11), and the casing wall of the casing (11) has a return air port, an air outlet (111), a heat exchange air inlet and a heat exchange air outlet; The return air port, the return air channel (12), the internal cooling channel of the heat exchange core (13), the air supply channel (14) and the air outlet (111) are connected in sequence; The heat exchange air inlet, the heat exchange air inlet channel (15), the internal heat exchange channel of the heat exchange core (13), the heat exchange air outlet channel (16) and the heat exchange air outlet are connected in sequence; The air outlet (111) comprises an air supply port (1111) and an air expansion port (1112); the air supply port (1111) is located at the bottom of the heat exchange core (13); the air expansion port (1112) is located on the side of the heat exchange core (13); and the inlet of the static pressure box (2) is sealed and connected to the air outlet (111).

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