CN116806081A

CN116806081A - cooling device

Info

Publication number: CN116806081A
Application number: CN202310277686.8A
Authority: CN
Inventors: 杨利生; 请求不公布姓名; 尹斌
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-09-26

Abstract

The application discloses a cooling device, which comprises a first part and a second part, wherein the first part comprises a first shell part, a power module and a heat exchange piece, and the power module and the heat exchange piece are positioned in the first shell part. The second part comprises a second shell part, a heat exchanger, a liquid pump and a fan, the second shell part is provided with an air inlet and an air outlet, and the first shell part and the second shell part are at least partially of a split type structure. The cooling device is in a heat dissipation working state, the heat exchange piece exchanges heat with the power module in the heat dissipation working state, the fan guides air outside the second shell part into the second shell part from the air inlet, and the air flows out from the air outlet after exchanging heat with the heat exchanger. According to the application, the first shell part and the second shell part are at least partially of a split type structure, namely, the cooling device is at least partially of a split type structure, so that the installation, the replacement, the maintenance and the production and the processing are convenient.

Description

Cooling device

Technical Field

The application relates to the technical field of thermal management, in particular to a cooling device.

Background

At present, along with the rapid development of the new energy automobile industry, a super charging pile capable of meeting the rapid charging of a power battery of the new energy automobile becomes a necessity for the continuous voyage of the new energy automobile. The power module in the power cabinet is one of the core components of the charging system, a large amount of heat can be released in the process of rapidly charging the power battery, so that the temperature of the power module is rapidly increased, the performance and reliability of the power module are reduced due to the excessively high temperature, even the power module is invalid, and the risk of spontaneous combustion is caused under the extremely high temperature condition. In order to ensure that the power module is always within a safe temperature, a thermal management system of the power cabinet is particularly important.

In the related art, the power cabinet adopts an integrated structure, and certain difficulty is caused for installation, replacement, maintenance and production.

Disclosure of Invention

In view of the above-mentioned problems of the related art, the present application provides a split type cooling device.

In order to achieve the above purpose, the present application adopts the following technical scheme: a cooling device comprising a first part and a second part, wherein the first part comprises a first shell part, a power module and a heat exchange piece, the power module and the heat exchange piece are positioned in the first shell part, the second part comprises a second shell part, a heat exchanger, a liquid pump and a fan, the second shell part is provided with an air inlet and an air outlet, and the first shell part and the second shell part are at least partially in a split type structure;

the cooling device is in a heat dissipation working state, the heat exchange piece exchanges heat with the power module in the heat dissipation working state, the fan guides air outside the second shell part into the second shell part from the air inlet, and the air flows out from the air outlet after exchanging heat with the heat exchanger.

In the application, the cooling device comprises a first part and a second part, the power module is positioned in a first shell part of the first part, the heat exchanger is positioned in a second shell part of the second part, and the first shell part and the second shell part are at least partially in a split type structure, namely, the cooling device is at least partially in a split type structure, so that the cooling device is convenient to install, replace, maintain and manufacture.

Drawings

FIG. 1 is a perspective view of a cooling device of the present application;

FIG. 2 is a perspective view of a second portion of the cooling device of the present application;

FIG. 3 is an exploded perspective view of a second portion of the cooling device of the present application;

FIG. 4 is another exploded perspective view of the second portion of the cooling device of the present application;

FIG. 5 is a top view of FIG. 2;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a schematic diagram of a system of a second portion of the cooling device of the present application;

FIG. 8 is another schematic system diagram of a second portion of the cooling apparatus of the present application;

fig. 9 is a partially enlarged view of fig. 7.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the application. Rather, they are merely examples of apparatus and methods consistent with aspects of the application as detailed in the accompanying claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms first, second and the like used in the description and the claims do not denote any order, quantity or importance, but rather are used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two and more than two. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper" and the like are merely for convenience of description and are not limited to one location or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded.

A cooling device according to an exemplary embodiment of the present application will be described in detail with reference to the accompanying drawings. The features of the examples and embodiments described below may be supplemented or combined with one another without conflict.

As shown in fig. 1 to 9, the cooling device of the present application comprises a first part 1 and a second part 2.

Referring to fig. 1, 7 and 8, the first portion 1 includes a first housing 10, a power module 100 and a heat exchanging member (not shown). The power module 100 and the heat exchange element are located within the first housing part 10. The second part 2 comprises a second housing part 20, a heat exchanger 21, a liquid pump 22, a water tank assembly 23 and a fan 24. The second housing portion 20 has an air inlet 2030 and an air outlet 2020. The cooling device has a heat dissipation working state. In the heat dissipation working state, the heat exchange member exchanges heat with the power module 100, the fan 24 guides the air outside the second housing portion 20 from the air inlet 2030 into the second housing portion 20, and the air exchanges heat with the heat exchanger 21 and flows out from the air outlet 2020. It should be noted that, both the first housing part 10 and the second housing part 20 are at least partially of a split structure, in other words, the first housing part 10 and the second housing part 20 may be a part of the wall as a single structure or be shared by part of the wall, and the remaining wall parts are of a split structure; the first housing part 10 and the second housing part 20 may be both of a split type structure.

In a specific embodiment, the heat exchange member is a liquid cooling plate. The liquid cooling plates are connected in series with the heat exchanger 21 and the liquid pump 22 to form a main loop, wherein the series connection only has a connection relationship and has no connection sequence, the liquid cooling plates can be combined, and the series connection can be directly connected or indirectly connected (such as through a pipeline or other components arranged between the liquid cooling plates and the heat exchanger); the liquid cooling plate is disposed beside the power module 100 and contacts the power module 100, where the contact may be direct contact or indirect contact (such as a heat transfer pad disposed therebetween). The cooling liquid in the main circuit exchanges heat with the power module 100 at the liquid cooling plate, that is, absorbs heat generated by the power module 100, and exchanges heat with air flowing into the second housing part 20 at the heat exchanger 21, that is, radiates heat generated by the power module 100, and the liquid pump 22 drives the cooling liquid to circulate in the main circuit. The cooling liquid achieves the effect of cooling the power module 100 through the liquid cooling plate in contact with the power module 100, which is a conventional technology for those skilled in the art, and the present application will not be described in detail; it is to be noted that, in the present application, the number of the liquid cooling plates for performing heat exchange on the power module 100 is not particularly limited, and may be one or more, and may be one-to-one corresponding to the power module 100. In an embodiment, when the number of liquid cooling plates is multiple, all the liquid cooling plates may be arranged in parallel, that is, the liquid is fed through the same liquid feeding pipe and discharged through the same liquid discharging pipe, the power module 100 is at least two liquid cooling plates connected in parallel, and the liquid cooling plates are correspondingly arranged at least two liquid cooling plates and connected in parallel and then are connected into the main loop, for example: the embodiment shown in fig. 7 includes three power modules 100 connected in parallel, the number of liquid cooling plates is also three, the refrigerant flowing through the loop dissipates heat from one heat exchanger 21, the number of heat exchange components included in the heat exchanger 21 is not particularly limited, and may be one or more, and when the number of heat exchange components is more, the heat exchange components may be connected in series or in parallel. In another embodiment, when the number of liquid cooling plates is multiple, the liquid cooling plates can be divided into at least two branches, the branches are connected in parallel, each branch is provided with a plurality of liquid cooling plates connected in parallel, the liquid cooling plates on the same branch feed liquid pipe feed liquid, the liquid cooling plates on different branches discharge liquid through the same liquid outlet pipe, and the number of liquid cooling plates on different branches can be the same or different, for example: the embodiment shown in fig. 8 includes three parallel power modules 100 and three other parallel power modules 100, that is, six power modules 100 are arranged in a one-to-one correspondence, and the liquid cooling plates are arranged in parallel with the power modules 100, so that two branches include two liquid cooling plates connected in parallel, each branch includes three parallel liquid cooling plates, the power modules 100 are configured to emit heat at the heat exchanger 21 through the refrigerant flowing in the loop, where the number of heat exchange components included in the heat exchanger 21 is not specifically limited, and may be one or more, and when the number of heat exchange components is more, the heat exchange components may be connected in series, or may be connected in parallel (for example, the heat exchanger 21 shown in fig. 8 includes the first heat exchange component 211 and the second heat exchange component 212 connected in parallel), and therefore, the liquid cooling plates correspondingly include three liquid cooling plates connected in parallel with the power modules 100 respectively, that is six liquid cooling plates in total. In summary, the liquid cooling plates are disposed beside the power module 100 and in contact with the power module 100 in a one-to-one correspondence manner, so as to absorb heat generated by the power module 100.

In the application, the cooling device comprises a first part 1 and a second part 2, the power module 100 is positioned in a first shell part 10 of the first part 1, the heat exchanger 21 is positioned in a second shell part 20 of the second part 2, and the first shell part 10 and the second shell part 20 are at least partially in a split structure, namely, the cooling device at least partially adopts the split structure, each part can be synchronously produced, processed and assembled, and then the two parts are installed, so that the installation is convenient and quick, the production efficiency is improved, in addition, in the subsequent use process, if a certain part has a problem, the corresponding part can be maintained or replaced, and the replacement or maintenance is convenient. In addition, no matter the charging system power module 100 is in an air cooling or liquid cooling heat dissipation mode, the heat exchanger 21 in the equipment needs to be cooled by air in an external natural environment, if an integrated structure is adopted, the power module 100 is in a ventilated environment and is easily influenced by water vapor, dust and the like, so that the service life of the power module 100 is reduced, the power module 100 and the heat exchanger 21 are respectively arranged in the first shell part 10 and the second shell part 20, the power module 100 and the heat exchanger 21 needing to exchange heat with the external environment are separately arranged, the first part 1 where the power module 100 is positioned and the second part 2 where the heat exchanger 21 is positioned can be isolated in space by adopting a split structure, the influence of the external environment on the power module 100 is reduced, the power module 100 is not influenced by water vapor, dust and the like, the protection effect on the power module 100 is improved, and the service life of the power module 100 is prolonged.

In this embodiment, the first portion 1 and the second portion 2 are distributed along the height direction of the cooling device, and the first housing portion 10 and the second housing portion 20 are both in a split structure, that is, the second portion 2 is disposed on top of the first portion 1, so that the cooling device of the present application fully utilizes the top space of the first portion 1, and reduces the overall floor area of the device. Therefore, in the cooling device of the present application, the second housing portion 20 includes a bottom wall 201, a top wall 202, and a side wall 203. The bottom wall 201 is fixed on top of the first portion 1, the top wall 202 is opposite to the bottom wall 201, the side wall 203 is connected between the bottom wall 201 and the top wall 202, the second housing portion 20 has an accommodating space, and the accommodating space is at least partially located at an inner periphery of the bottom wall 201, the top wall 202 and the side wall 203, in other words, the bottom wall 201, the top wall 202 and the side wall 203 jointly enclose to form an accommodating space. The heat exchanger 21 and the liquid pump 22 are located in the accommodating space, and the fan 24 is connected with the second housing part 20.

The cooling device of the application respectively arranges the power module 100 and the heat exchanger 21 in the first shell part 10 and the second shell part 20, and separates the power module 100 from the heat exchanger 21 which needs to exchange heat with the external environment, thereby reducing the influence of the external environment on the power module 100 and improving the protection effect on the power module 100. Furthermore, the second part 2 is arranged on top of the first part 1, thereby making full use of the head space of the first part 1 and reducing the overall footprint of the device.

It is particularly pointed out that with reference to fig. 3 and 7, the second part 2 may also comprise a water tank assembly 23, but the water tank assembly 23 is not essential. The water tank assembly 23 includes, in addition to the reservoir 231 connected in the main circuit, a level gauge 232 and a venting cap 233, the level gauge 232 being provided inside the reservoir 231, the venting cap 233 being provided on top of the reservoir 231. Thus, in the specific embodiment, the heat exchanger 21, the liquid pump 22 and the liquid tank 231 in the water tank assembly 23 are connected by a pipe 27, and the pipe 27 passes through the hole 2010 on the bottom wall 201 into the first portion 1 to communicate with the internal passage of the liquid cooling plate.

In the present application, at least one of the side walls 203 is provided with the air inlet 2030, and the air inlet 2030 is provided on the side wall 203. Referring to fig. 1 and 2, the first portion 1 is seen from the front, back, left and right sides which the first portion 1 generally has, wherein the side facing the user is the front side. The side walls 203 also include a front side wall 2031, a rear side wall 2032, a left side wall 2033, and a right side wall 2034 corresponding to the front, rear, left, and right sides of the first section 1. At least one of the side walls 203 of the second housing portion 20 extending in the length direction is provided with an air inlet 2030, and in one embodiment, the air inlet 2030 is located on the front side wall 2031 and the rear side wall 2032; the top wall 202 is provided with an outlet 2020. Therefore, the ambient air enters from the front and rear side walls 203 and exits from the top wall 202, so that the wind field of the heat exchanger 21 is relatively uniform.

In one embodiment, the fan 24 is at least partially located outside the second housing portion 20, the bottom or the side of the fan 24 is connected to the top wall 202, the circulation channel of the fan 24 is in communication with the accommodating space, and the air outlet 2020 is located at the circulation channel port of the fan 24; alternatively, in other embodiments, the fan 24 is at least partially located in the second housing portion 20, the top of the fan 24 is connected to the top wall 202, the air outlet 2020 is provided on the top wall 202, and the circulation channel of the fan 24 communicates between the accommodating space and the air outlet 2020. In the above embodiments, the fan 24 may be fixedly connected to the top wall 202, so that the fan 24 is mounted on the second housing portion 20, and air outside the second housing portion 20 is guided into the second housing portion 20 from the air inlet 2030, and flows out from the air outlet 2020 after exchanging heat with the heat exchanger 21.

Referring to fig. 4 and 6, in the embodiment, the heat exchanger 21 includes at least one heat exchange component, and when the number of heat exchange components is more than two, the heat exchange components are arranged in parallel, but may also be arranged in series. In the present embodiment, the heat exchanger 21 includes a first heat exchange member 211 and a second heat exchange member 212. The first heat exchange component 211 and the second heat exchange component 212 are connected in parallel and then connected into the main circuit, and the first heat exchange component 211 and the second heat exchange component 212 are respectively positioned on a branch circuit relative to the main circuit. In the case that the heat exchanger 21 is a microchannel heat exchanger, the first heat exchange component 211 and the second heat exchange component 212 each include a plurality of heat exchange fins extending in parallel along the length direction of the second housing portion 20; fins can be arranged between two adjacent heat exchange plates to accelerate heat exchange.

Referring to fig. 4, the first heat exchanging elements 211 and the second heat exchanging elements 212 are symmetrically arranged along the width direction of the second housing part 20. That is, the first heat exchange component 211 is disposed adjacent the air inlet 2030 on the front side wall 2031 and the second heat exchange component 212 is disposed adjacent the air inlet 2030 on the rear side wall 2032.

The first heat exchanging element 211 and the second heat exchanging element 212 are arranged above the bottom wall 201. In the first embodiment, the first heat exchange component 211 and the second heat exchange component 212 may be arranged in a side-by-side manner, i.e. the vertical sections of the first heat exchange component 211 and the second heat exchange component 212 along the width direction of the second housing portion 20 are combined into a straight shape; in a second embodiment of the present application, referring to fig. 6, the cross sections of the first heat exchanging element 211 and the second heat exchanging element 212 along the width direction of the second housing portion 20 are combined into a V shape with an opening facing the top wall 202. Compared with the first embodiment, the embodiment has the advantages that the space is fully utilized, the larger heat exchange area is realized, and therefore, the better heat dissipation effect is realized.

In other embodiments, the air outlet 2020 is also provided on the top wall 202, the air inlets 2030 are provided on the side walls 203 along the circumferential direction, and the heat exchanger 21 is enclosed by a circle of horizontal sections along the width direction of the second housing portion 20, which is not shown in the drawings. In the present embodiment, the shape of the heat exchanger 21 enclosed by the horizontal cross section along the width direction of the second housing portion 20 is not particularly limited, and may be rectangular, circular, or the like, and the number of heat exchanging members included in the heat exchanger 21 is not particularly limited, and in the case where the horizontal cross section of the heat exchanger 21 is rectangular, two heat exchanging members having an L-shaped cross section may be combined into the rectangular heat exchanger 21, or one heat exchanging member having a C-shaped cross section and one heat exchanging member having a straight shape may be combined into the rectangular heat exchanger 21, and since many cases may be mentioned, they are not listed here.

In a specific embodiment, the cooling device of the present application includes a first fan 241 and a second fan 242. Referring to fig. 4 to 6, the top wall 202 is provided with a first air outlet 2021 and a second air outlet 2022 along the length direction of the second housing portion 20, the first fan 241 is disposed at a position corresponding to the first air outlet 2021, and the second fan 242 is disposed at a position corresponding to the second air outlet 2022. So configured, the flow channel of the first fan 241 communicates with the first air outlet 2021, and the flow channel of the second fan 242 communicates with the second air outlet 2022. The first fan 241 and the second fan 242 both blow or suck air above the first heat exchange component 211 and the second heat exchange component 212, which are arranged in a V-shaped cross section, so that heat dissipation is effectively accelerated.

In other embodiments, the air outlet 2020 is provided on at least one side wall 203 along the length of the second housing portion 20, and the fan 24 is mounted on the side wall 203 provided with the air outlet 2020, which is not shown in the drawings. In this embodiment, the side walls 203 provided with the air outlets 2020 are distributed along the length direction of the second housing portion 20, so that the heat exchangers 21 can be distributed in the second housing portion 20 to the maximum extent, which is beneficial to improving the heat exchange efficiency, and the air outlets 2020 may be provided along one of the side walls 203 distributed along the length direction of the second housing portion 20, or both side walls 203 may be provided with the air outlets 2020. In some embodiments, the vertical section of the heat exchanger 21 in the width direction of the second housing part 20 is V-shaped with an opening facing the bottom wall 201, or the vertical section of the heat exchanger 21 in the width direction of the second housing part 20 is U-shaped with an opening facing the bottom wall 201. The remaining side walls 203 and top wall 202 are provided with air intakes. The heat exchanger 21 may include one heat exchange component, or may include a plurality of heat exchange components, and different heat exchange components may be connected in series or in parallel.

Referring to fig. 7 and 8, the second portion 2 includes a bypass branch connected in parallel with the heat exchanger 21, the bypass branch including a valve element 251. The valve element 251 is an electric ball valve, and the electric ball valve is used for controlling the flow of the cooling liquid in the bypass branch and whether the cooling liquid exists or not. In a low-temperature environment, the viscosity of the cooling liquid is high, the system resistance is excessive, the electric ball valve 251 is opened, and the cooling liquid does not flow through the heat exchanger 21, so that the circulation resistance is reduced.

Referring to fig. 7 and 8, the second portion 2 further includes a check valve 252 connected in series in the main circuit, and the check valve 252 enables the coolant to flow in a single direction in the main circuit, so as to ensure that the circulating flow of the main circuit does not generate crosstalk.

With continued reference to fig. 7 and 8, the second portion 2 includes a first temperature sensor 261 and a second temperature sensor 262, and both ends of the liquid cooling plate have an inlet for the heat exchange fluid to flow in and an outlet for the heat exchange fluid to flow out, the first temperature sensor 261 being close to the outlet with respect to the inlet, and the second temperature sensor 262 being close to the inlet with respect to the outlet. The first temperature sensor 261 is configured to sense the temperature of the fluid at the front end of the liquid cooling plate near the power module 100, the second temperature sensor 262 is configured to sense the temperature of the fluid at the rear end of the liquid cooling plate near the power module 100, and the temperature values of the first temperature sensor 261 and the second temperature sensor 262 are used as a basis for judging whether to start the electric ball valve 251; the temperature value detected by the first temperature sensor 261 and/or the second temperature sensor 262 is a basis for determining whether to start the fan 24; the temperature difference between the first temperature sensor 261 and the second temperature sensor 262 is a basis for judging the rotation speed of the fan 24; that is, in the case that the temperature values of both the first temperature sensor 261 and the second temperature sensor 262 are smaller than the set value, it is illustrated that the cooling device of the present application is in an extremely cold low temperature environment, and the electric ball valve 251 is started so that the cooling liquid does not flow through the heat exchanger 21, thereby reducing the circulation resistance; if the temperature value detected by the first temperature sensor 261 and/or the second temperature sensor 262 is greater than another set value, it indicates that the power module 100 releases a certain amount of heat to the liquid cooling plate, and the fan 24 needs to be started to help dissipate heat; further, the rotational speed of the blower 24 is adjusted according to the difference between the first temperature sensor 261 and the second temperature sensor 262, and the greater the difference between the first temperature sensor 261 and the second temperature sensor 262, the greater the rotational speed of the blower 24.

The cooling device of the application has the second part 2 arranged on the top of the first part 1, so that the application fully utilizes the top space of the first part 1 and reduces the whole occupied area of the device. Meanwhile, the application dissipates heat of the cooling liquid flowing in the heat exchanger 21 by the ambient air driven by the fan, the cooling liquid in the liquid cooling loop is driven by the water pump to refrigerate the power module 100 through the liquid cooling plate, the liquid cooling refrigeration mode meets the heat dissipation requirement of the power module 100, and a better heat dissipation effect is realized. In the application, the power modules 100 are connected in parallel, and the waterway pipelines of the branches where each power module 100 is positioned are arranged in the same path, so that the resistance of each branch is the same, the flow distribution of each branch is uniform, and the power modules 100 can realize the heat dissipation effect well.

The present application is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present application can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. The cooling device is characterized by comprising a first part and a second part, wherein the first part comprises a first shell part, a power module and a heat exchange piece, the power module and the heat exchange piece are positioned in the first shell part, the second part comprises a second shell part, a heat exchanger, a liquid pump and a fan, the second shell part is provided with an air inlet and an air outlet, and the first shell part and the second shell part are at least partially of a split type structure;

2. The cooling device of claim 1, wherein the first portion and the second portion are distributed along a height direction of the cooling device, both the first housing portion and the second housing portion being of a split structure, the second housing portion being located on top of the first housing portion; the second shell part comprises a bottom wall, a top wall and a side wall, the bottom wall is fixed at the top of the first shell part, the top wall and the bottom wall are oppositely arranged, the side wall is connected between the bottom wall and the top wall, the second shell part is provided with an accommodating space, the accommodating space is at least partially positioned at the inner periphery of the bottom wall, the top wall and the side wall, the heat exchanger and the liquid pump are positioned in the accommodating space, and the fan is connected with the second shell part.

3. The cooling device of claim 2, wherein at least one of the side walls is provided with the air intake, the fan being connected to the top wall;

the fan is at least partially positioned outside the second shell part, the bottom or the side part of the fan is connected with the top wall, the circulating channel of the fan is communicated with the accommodating space, and the air outlet is positioned at the circulating channel opening of the fan;

or, the fan is at least partially located in the second shell part, the top of the fan is connected with the top wall, the air outlet is formed in the top wall, and the circulation channel of the fan is communicated with the accommodating space and the air outlet.

4. A cooling device according to claim 3, wherein the cooling device has a main circuit, the heat exchange member, the heat exchanger, the liquid pump are located in the main circuit, and the heat exchange member is connected in series with the heat exchanger, the liquid pump, the heat exchange member being disposed beside and in contact with the power module;

in the heat radiation working state, the liquid pump drives the cooling liquid to circularly flow in the main loop, the cooling liquid exchanges heat with the power module at the heat exchange part, and the cooling liquid exchanges heat with air flowing into the second shell part at the heat exchanger;

the heat exchange piece is a liquid cooling plate.

5. A cooling device according to claim 3, wherein the heat exchanger comprises at least one heat exchange member, and when the number of heat exchange members is two or more, the heat exchange members are arranged in parallel;

the heat exchanger is a micro-channel heat exchanger.

6. The cooling device according to claim 5, wherein the heat exchanger includes a first heat exchange member and a second heat exchange member, each of the first heat exchange member and the second heat exchange member including a plurality of heat exchange fins extending in parallel along a length direction of the second housing portion, the first heat exchange member and the second heat exchange member symmetrically arranging the cooling device in a width direction of the second housing portion;

the first heat exchange component and the second heat exchange component are arranged above the bottom wall, the vertical section of the first heat exchange component and the vertical section of the second heat exchange component in the width direction of the second shell part is combined into a V shape with an opening facing the top wall, and the air inlet is positioned on at least one side wall of the second shell part extending in the length direction.

7. The cooling apparatus according to claim 5, wherein the side walls are each provided with the air intake port in the circumferential direction, and the heat exchanger is enclosed in a circle in a horizontal cross section in the width direction of the second housing portion.

8. The cooling device according to claim 2, wherein the fan includes a first fan and a second fan, the top wall is provided with a first air outlet and a second air outlet along a length direction of the second housing portion, a circulation passage of the first fan communicates with the first air outlet, and a circulation passage of the second fan communicates with the second air outlet.

9. The cooling device according to claim 2, wherein the air outlet is provided in at least one side wall in a length direction of the second housing portion, and the side wall provided with the air outlet is provided with the blower;

the heat exchanger has a V-shaped or U-shaped cross section in the width direction of the second housing part, the opening of which faces the bottom wall.

10. The cooling device of claim 4, wherein the second portion comprises a tank assembly comprising a tank connected in the main circuit; the water tank assembly further comprises a liquid level meter and an exhaust pressure relief cover, wherein the liquid level meter is arranged in the liquid storage tank, and the exhaust pressure relief cover is arranged on a top cooling device of the liquid storage tank;

the second part comprises a bypass branch, the bypass branch is connected with the heat exchanger in parallel, the bypass branch comprises a valve element, the valve element is an electric ball valve, and the electric ball valve is used for controlling the flow of the cooling liquid in the bypass branch and whether the cooling liquid exists or not.