Heat dissipation device and power conversion equipment

Abstract

The utility model discloses a heat dissipation device and power conversion equipment, and belongs to the technical field of power equipment heat dissipation, and the heat dissipation device comprises an evaporator which is provided with a containing cavity; the condenser comprises a main body part and a partition plate, a condensation cavity extending in the first direction is formed in the side, facing the evaporator, of the main body part, and the condensation cavity communicates with the containing cavity; the partition plate is arranged in the condensation cavity and connected with the main body part, the condensation cavity is divided into a plurality of condensation channels distributed in the second direction by the partition plate, at least one condensation channel is a first channel, at least another condensation channel is a second channel, in the second direction, the first channel is located above the second channel, and the second channel is located above the second channel. The maximum size of the first channel in the second direction is larger than the maximum size of the second channel in the second direction. The volume change requirements of the gaseous working medium and the liquid working medium are met through the first channel and the second channel, and mutual interference is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of heat dissipation of power equipment, and particularly relates to a heat dissipation device and a power conversion device. BACKGROUND

[0002] The phase change heat dissipation device has been applied to power equipment as a high-efficiency heat dissipation structure. The phase change heat dissipation device comprises an evaporator and a condenser. The evaporator contains a cooling medium, and the condenser is used to cool the gaseous working medium introduced by the evaporator into liquid working medium.

[0003] In the working process of the existing phase change heat dissipator, both gaseous working medium and liquid working medium exist in the condensing channel. The flow direction of the liquid working medium is usually not unique, while the gaseous working medium generally flows in one direction. This easily leads to mutual influence between the gaseous / liquid working medium, and increases the flow resistance. CONTENT OF THE UTILITY MODEL

[0004] The application provides a heat dissipation device, which aims to solve the technical problem that the gaseous working medium and the liquid working medium in the condensing channel of the existing phase change heat dissipator will mutually influence each other, and increase the flow resistance. Another object of the application is to provide a power conversion device.

[0005] TECHNICAL SCHEME: The heat dissipation device provided by the application comprises:

[0006] An evaporator having a containing cavity;

[0007] A condenser comprising a main body and a partition plate. The main body is provided with a condensing cavity extending in a first direction on the side facing the evaporator. The condensing cavity is in communication with the containing cavity.

[0008] The partition plate is arranged in the condensing cavity and connected with the main body. The partition plate divides the condensing cavity into a plurality of condensing channels arranged in a second direction. The second direction intersects the first direction. Among the plurality of condensing channels, at least one condensing channel is a first channel, and at least another condensing channel is a second channel. In the second direction, the first channel is located above the second channel. The maximum dimension of the first channel along the second direction is greater than the maximum dimension of the second channel along the second direction.

[0009] In some embodiments, the number of partition plates is multiple, and the plurality of partition plates are arranged at intervals in the second direction. The number of the first channels and / or the second channels among the plurality of condensing channels is multiple.

[0010] In some embodiments, a plurality of the partitions are provided, and the plurality of the partitions are arranged in the second direction at intervals, and the maximum dimension of the condensation channels in the second direction decreases from top to bottom.

[0011] In some embodiments, at least some of the partitions are arranged at an angle with the first direction.

[0012] In some embodiments, the condensation cavity comprises an inner side surface arranged in the second direction, and the inner side surface is above the partitions in the second direction.

[0013] The distance between the partitions and the inner side surface in the second direction gradually decreases in the direction in which the partitions are away from the containing cavity.

[0014] In some embodiments, the condensation cavity comprises an inner side surface arranged in the second direction, and the inner side surface is above the partitions in the second direction.

[0015] The distance between the partitions and the inner side surface in the second direction gradually increases in the direction in which the partitions are away from the containing cavity.

[0016] The plurality of the condensation channels are in communication with each other at the end away from the containing cavity.

[0017] In some embodiments, at least one of the condensation channels is a third channel, and the third channel is arranged on the side of the second channel away from the first channel.

[0018] In some embodiments, the partitions extend in the first direction.

[0019] In some embodiments, the condenser further comprises a plurality of flow guides, and at least some of the condensation channels are provided with a plurality of the flow guides, and the plurality of the flow guides in each of the condensation channels are arranged in a row in the extension direction of the partitions, and adjacent two of the flow guides are arranged at intervals, and the flow guides are connected with the condensation channels.

[0020] In some embodiments, each of the condensation channels comprises a first surface and a second surface arranged oppositely in the second direction, and the first surface is above the second surface, and in the second direction, the distance between the flow guide and the first surface is greater than the distance between the flow guide and the second surface.

[0021] In some embodiments, the condensation channels are provided with a plurality of rows of the flow guides, and the plurality of rows of the flow guides are arranged at intervals in the second direction.

[0022] In some embodiments, the condensation channels are arranged in the first direction throughout.

[0023] The heat dissipation device further comprises a cover plate connected to the main body part at an end away from the evaporator, and a flow collection cavity in communication with the condensation cavity is arranged on one side of the cover plate facing the main body part.

[0024] Correspondingly, the power conversion device provided by the embodiment of the present application comprises the heat dissipation device.

[0025] Beneficial effects: the heat dissipation device provided by the embodiment of the present application has the maximum size of the first channel along the second direction greater than the maximum size of the second channel along the second direction, so that the space size of at least part of the positions of the first channel and the second channel conforms to the volume change of the working medium evaporation and condensation, the mutual interference between the gaseous working medium and the liquid working medium is reduced, and the flow resistance is reduced.

[0026] The power conversion device provided by the embodiment of the present application comprises the heat dissipation device, and therefore can have all the technical features and beneficial effects of the heat dissipation device. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The structural schematic diagram of the heat dissipation device provided by the embodiment of the present application is shown in the figure;

[0029] Figure 2 The structural schematic diagram of the evaporator provided by the embodiment of the present application is shown in the figure;

[0030] Figure 3 The distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0031] Figure 4 Another distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0032] Figure 5 Another distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0033] Figure 6 Another distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0034] Figure 7 Another distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0035] Figure 8 Another distribution schematic diagram of the partition provided by the embodiment of the present application is shown in the figure;

[0036] Figure 9 A structure diagram of a heat conduction part provided in an embodiment of the present application is shown in the following;

[0037] The reference signs: 1, evaporator; 11, base plate; 111, containing cavity; 12, side plate; 121, through hole; 2, condenser; 21, main body part; 211, condensing channel; 2111, first channel; 2112, second channel; 2113, third channel; 212, inner side; 213, first surface; 214, second surface; 22, partition plate; 23, flow guide part; 3, cover plate; 31, converging cavity. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0039] In the description of the present application, it should be understood that the terms "height", "thickness", "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, at least one of which can be one, two or more, unless otherwise explicitly specified.

[0040] It should also be noted that in the drawings of the embodiments of the present application, the arrow marked X represents the first direction X, and the arrow marked Y represents the second direction Y. The first direction X and the second direction Y are introduced to more clearly describe the structure and relative positional relationship of the components in the heat dissipation device. In actual application, the first direction X and the second direction Y may change according to the different placement modes of the heat dissipation device.

[0041] As a prologue of the embodiments of the present application, the phase change heat sink includes a condenser, an evaporator and an internal phase change working medium. The evaporator absorbs heat from the heat source, and the internal liquid phase change working medium vaporizes. Under the action of gravity and pressure difference, it rises into the condenser. The gaseous phase change working medium in the condenser is cooled by an external fan, and the gaseous working medium condenses into liquid under the action of gravity and flows back to the evaporator, repeating the above cycle.

[0042] The working medium in the condenser flows through the condensing channel for condensation. The commonly used condensing channel is a porous flat tube structure, and multiple channels inside the structure are arranged in parallel. Considering the arrangement of the integrated phase-change heat sink, the evaporator is installed along the direction of gravity, and the condenser of the phase-change heat sink is horizontally placed, so that the channels in the condenser are also horizontally arranged. When the gaseous working medium enters the condensing channel, the gaseous working medium will gradually condense into liquid along with the cooling of the external air. At this time, there are both gaseous working medium and liquid working medium in a condensing channel, and the liquid working medium will flow left and right along the flow channel, while the gaseous working medium will only flow in a single direction. The gaseous working medium and the liquid working medium will affect each other, resulting in an increase in flow resistance.

[0043] Please refer to Figure 1 and Figure 2 The heat dissipation device provided in the embodiment of the application includes an evaporator 1 and a condenser 2. The evaporator 1 has a containing cavity 111, and the containing cavity 111 is provided with phase-change working medium such as water, ethanol, ammonia, etc. The evaporator 1 is arranged on a heat source, and the heat of the heat source is used to make the working medium in the containing cavity 111 change phase.

[0044] The condenser 2 includes a main body part 21 and a partition plate 22. The main body part 21 is connected with the evaporator 1, and the side of the main body part 21 facing the evaporator 1 is provided with a condensing cavity extending along a first direction X. The condensing cavity is in communication with the containing cavity 111 at the end close to the evaporator 1. The partition plate 22 is arranged in the condensing cavity and connected with the main body part 21. The partition plate 22 divides the condensing cavity into multiple condensing channels 211 arranged along a second direction Y. The second direction Y is the direction of gravity and intersects the first direction X. The angle between the second direction Y and the first direction X is 85°-95°, and is preferably 90°. Among the multiple condensing channels 211, at least one condensing channel 211 is a first channel 2111, and at least another condensing channel 211 is a second channel 2112. In the second direction Y, the first channel 2111 is located above the second channel 2112, and the maximum size of the first channel 2111 along the second direction Y is greater than the maximum size of the second channel 2112 along the second direction Y. In the embodiment, the first channel 2111 being located above the second channel 2112 means that, in the case that the condenser 2 is horizontally placed, the relative position of the first channel 2111 is higher than that of the second channel 2112.

[0045] Specifically, the evaporator 1 comprises a base plate 11 and a side plate 12, the base plate 11 is provided with a containing cavity 111 on one side, the side plate 12 is connected with the base plate 11 and covers the containing cavity 111, the side plate 12 is provided with a through hole 121 penetrating along the thickness direction of the side plate 12, and the through hole 121 is communicated with the containing cavity 111, the main body part 21 is inserted into the through hole 121 corresponding to one end of the condensing channel 211 opening, and is connected with the side plate 12, so as to realize the communication between the condensing cavity and the containing cavity 111. In other embodiments, the condensing cavity can also be communicated with the containing cavity 111 through a pipeline.

[0046] Among the plurality of condensing channels 211, at least one condensing channel 211 is a first channel 2111, and at least another condensing channel 211 is a second channel 2112, the maximum size of the first channel 2111 along the second direction Y is greater than the maximum size of the second channel 2112 along the second direction Y, which can be understood as that the maximum size of one first channel 2111 along the second direction Y is greater than the maximum size of one second channel 2112 along the second direction Y; or in the case of a plurality of first channels 2111 and one second channel 2112, the maximum size of each first channel 2111 along the second direction Y is greater than the maximum size of the second channel 2112 along the second direction Y; or in the case of one first channel 2111 and a plurality of second channels 2112, the maximum size of the first channel 2111 along the second direction Y is greater than the maximum size of each second channel 2112 along the second direction Y; or in the case of a plurality of first channels 2111 and a plurality of second channels 2112, the maximum size of any first channel 2111 along the second direction Y is greater than the maximum size of any second channel 2112 along the second direction Y. At the same time, in the above cases, if the number of first channels 2111 is multiple, the maximum size of each first channel 2111 along the second direction Y can be the same or different, similarly, if the number of second channels 2112 is multiple, the maximum size of each second channel 2112 along the second direction Y can be the same or different, mainly to ensure that the upper part of the channel in the up-down direction is greater than the lower part, which can be gradually reduced from top to bottom, or irregularly reduced. In addition, the first channel 2111 has a maximum size along the second direction Y, which can be understood as that at least part of the first channel 2111 is uneven, for example, the size of the first channel 2111 in the second direction Y decreases or increases along the first direction, so that the maximum size of the first channel 2111 is the distance of the maximum position in the second direction Y; or it can also be understood that the first channel 2111 is uniformly distributed, and the size of the first channel 2111 in the second direction Y at any position is its maximum size, or in other words, the maximum size of the first channel 2111 is the average distance between the top surface and the bottom surface. The understanding of the maximum size of the second channel 2112 along the second direction Y can refer to the first channel 2111, which will not be described here.

[0047] The working medium in the accommodation cavity 111 absorbs heat from the heat source and evaporates into a gaseous state. The gaseous working medium enters the first passage 2111 and the second passage 2112 to dissipate heat and condenses into liquid working medium, and then flows back to the accommodation cavity 111 along the partition plate 22. Since the plurality of condensation passages 211 are arranged in the second direction Y, and the gaseous working medium flows upward due to its relatively small density, the gaseous working medium in the upper part is relatively more in the second direction Y. By adjusting the space size of the first passage 2111 and the second passage 2112, the distribution and flow demand of the gaseous working medium in the second direction Y are met, the volume change of the working medium in the evaporation and condensation states is met, thereby reducing the mutual influence between the gaseous working medium and the liquid working medium, and reducing the flow resistance.

[0048] Please refer to Figures 4 to 6 In some embodiments, a plurality of partition plates 22 are arranged in the second direction Y, and the plurality of partition plates 22 divide the condensation cavity into a plurality of condensation passages 211. In the plurality of condensation passages 211, the number of first passages 2111 and / or second passages 2112 is set to be multiple.

[0049] Please refer to Figure 4 For example, the number of first passages 2111 is set to be multiple and arranged in the second direction Y in sequence, and the number of second passages 2112 is set to be one and arranged below the plurality of first passages 2111.

[0050] Please refer to Figure 5 For example, the number of second passages 2112 is set to be multiple and arranged in the second direction Y in sequence, and the number of first passages 2111 is set to be one and arranged above the plurality of second passages 2112.

[0051] Please refer to Figure 6 For example, the number of first passages 2111 and the number of second passages 2112 are both set to be multiple and arranged in the second direction Y in sequence, and the plurality of first passages 2111 are arranged above the plurality of second passages 2112.

[0052] The plurality of first passages 2111 and / or second passages 2112 increase the correspondence of the gaseous working medium in different levels in the second direction Y. The plurality of first passages 2111 with relatively large space help to reduce the flow resistance of the gaseous working medium, and the plurality of second passages 2112 with relatively small space help to flow back the liquid working medium.

[0053] Please refer to Figure 7 and Figure 8In some embodiments, multiple baffles 22 are provided, and the multiple baffles 22 are arranged at intervals along the second direction Y. At least a portion of the condensation channels 211 have their maximum dimensions decreasing sequentially from top to bottom along the second direction Y. The size variation of the condensation channels 211 is adapted to the distribution of the required volume of the gaseous working fluid, which can alleviate the mutual interference between the gaseous and liquid working fluids.

[0054] Please refer to Figure 7 For example, in a plurality of condensation channels 211, the size of some condensation channels 211 decreases from top to bottom along the second direction Y, while the size of the remaining condensation channels 211 remains the same and is smaller than the size of the upper part of the condensation channels 211.

[0055] Please refer to Figure 8 For example, the dimensions of all condensation channels 211 decrease sequentially from top to bottom along the second direction Y.

[0056] Please combine them together Figure 1 and Figure 3 In some embodiments, at least a portion of the partition 22 is angled to the first direction X. Specifically, the main body 21 is parallel to the first direction X, and the angle between the partition 22 and the first direction X is acute, causing the partition 22 to be inclined. In this case, the liquid working fluid can flow rapidly along the inclined direction of the partition 22, unifying the flow direction of the liquid working fluid and reducing its lateral flow within the condensation channel 211, thus helping to reduce the flow resistance experienced by the gaseous working fluid. In other embodiments, both the main body 21 and the partition 22 are inclined to the first direction X, and their inclined directions are parallel.

[0057] Please refer to Figure 1 In some embodiments, the condensation chamber includes an inner surface 212 disposed along a second direction Y, the inner surface 212 being located above the partition 22 along the second direction Y. The distance between the partition 22 and the inner surface 212 in the second direction Y gradually decreases along the direction of the partition 22 away from the receiving cavity 111. The downwardly inclined end of the partition 22 corresponds to the receiving cavity 111, so the liquid working fluid can quickly flow back to the receiving cavity 111 along the partition 22 under the action of gravity, separating from the gaseous working fluid.

[0058] In this embodiment, the multiple condensation channels 211 can be divided into a first partition and a second partition arranged from top to bottom. Each partition includes multiple condensation channels 211, wherein the condensation channel 211 in the first partition is the first channel 2111, and the condensation channel 211 in the second partition is the second channel 2112.

[0059] Please refer to Figure 3In some embodiments, the condensation cavity comprises an inner side surface 212 arranged along the second direction Y, the inner side surface 212 is located above the partition plate 22 along the second direction Y; the distance between the partition plate 22 and the inner side surface 212 along the second direction Y gradually increases in the direction away from the containing cavity 111 of the partition plate 22. The plurality of condensation channels 211 are communicated with each other at the end away from the containing cavity 111, which can be achieved by a pipeline, or by a through hole opened at the end of the partition plate 22 inclined downward, or by the remaining converging structure.

[0060] The end of the partition plate 22 inclined downward is away from the containing cavity 111, at this time, the liquid working medium flows along the partition plate 22 quickly, falls on the side away from the containing cavity 111, and then converges on the inner bottom surface of the condensation cavity and returns to the containing cavity 111. The flow direction of the liquid working medium along the partition plate 22 is the same as that of the gaseous working medium, and the return path of the liquid working medium is away from the gaseous working medium, so that the influence of the liquid working medium on the flow of the gaseous working medium is further reduced.

[0061] In the embodiment, the plurality of condensation channels 211 can be divided into a first subzone, a second subzone and a third subzone arranged from top to bottom, each subzone comprises a plurality of condensation channels 211, wherein the condensation channels 211 in the first subzone are first channels 2111, the condensation channels 211 in the second subzone are second channels 2112, and the condensation channels 211 in the third subzone are mainly for the quick flow of the liquid working medium. In other embodiments, the liquid working medium in each first channel 2111 and second channel 2112 converges and can be transported into the containing cavity 111 through a pipeline, and this return mode makes the liquid working medium pass through the outside of the main body part 21 to release heat again and improve the condensation effect.

[0062] Please refer to Figure 1 and Figure 3 In some embodiments, at least one condensation channel 211 is a third channel 2113, the third channel 2113 is arranged on the side away from the first channel 2111 of the second channel 2112, the maximum dimension of the third channel 2113 along the second direction Y can be uniformly distributed, or can be increasing or decreasing, and the third channel 2113 can be formed by the partition plate 22 or can be formed by the partition plate 22 and the inner bottom surface of the condensation cavity.

[0063] Please refer to Figure 1, the plurality of partitions 22 are inclined to the first direction X, forming an inclined upward distribution state, one partition 22 is parallel to the first direction X, the number of the third passages 2113 is two, the third passage 2113 located at the upper portion has a size in the second direction Y which increases in a direction away from the evaporator 1, and the third passage 2113 located at the lower portion has a size in the second direction Y which is constant. The third passage 2113 mainly provides a return path for the liquid working medium.

[0064] Please refer to Figure 3 , the plurality of partitions 22 are inclined to the first direction X, forming an inclined downward distribution state, the number of the third passages 2113 is one, and the size of the third passage 2113 in the second direction Y decreases in a direction away from the evaporator 1. The third passage 2113 provides a return path for the liquid working medium flowing out of the first passage 2111 and the second passage 2112 to the containing cavity 111. Since the return path is located in the main body portion 21, the integration of the condenser 2 structure can be increased.

[0065] Please refer to Figures 4 to 9 In some embodiments, the partitions 22 extend along the first direction X. At this time, the condensing passages 211 also extend along the first direction X, which can increase the uniformity of the utilization of the internal space of the condensing cavity by each condensing passage 211 in the second direction Y, and facilitate processing. In the case of dividing the first passage 2111 and the second passage 2112, the maximum size of the first passage 2111 is the width thereof in the second direction Y, and similarly, the maximum size of the second passage 2112 is the width thereof in the second direction Y.

[0066] Please refer to Figure 9 In some embodiments, the condenser 2 further comprises a plurality of flow guide portions 23, at least part of the condensing passages 211 are provided with the plurality of flow guide portions 23, the plurality of flow guide portions 23 in each condensing passage 211 are arranged in a row along the extension direction of the partitions 22, and adjacent two flow guide portions 23 are arranged at intervals, and the flow guide portion 23 is connected with the condensing passage 211.

[0067] In this embodiment, the extension direction of the partitions 22 is parallel to the first direction X, and adjacent two flow guide portions 23 are arranged at intervals along the extension direction of the partitions 22. After the gaseous working medium in the condensing passage 211 is condensed, the liquid working medium enters the area below along the gap between the partitions 22 under the action of gravity, realizing gas-liquid separation. In other embodiments, adjacent two flow guide portions 23 can also be arranged at intervals along the second direction Y, that is, the overall trend or average direction of the arrangement of the plurality of flow guide portions 23 conforms to the first direction X, or the extension direction of the partitions 22 is inclined to the first direction X.

[0068] Please refer to Figure 9In some embodiments, each condensing channel 211 comprises a first surface 213 and a second surface 214 arranged oppositely along the second direction Y, the first surface 213 is located above the second surface 214, and a row of flow guides 23 in each condensing channel 211 is arranged between the first surface 213 and the second surface 214. In the second direction Y, the spacing between the flow guides 23 and the first surface 213 is greater than the spacing between the flow guides 23 and the second surface 214. The flow channel space above the flow guides 23 is relatively large, which is conducive to the stable movement of the gaseous working medium and the sufficient heat exchange with the external environment. The flow channel space below the flow guides 23 is relatively small, which is conducive to the movement of the liquid working medium. At this time, the first surface 213 of the condensing channel 211 located at the top side in the second direction Y is the inner side surface 212 of the condensing cavity.

[0069] For reference Figure 9 In some embodiments, a plurality of rows of flow guides 23 are arranged in the condensing channel 211, and the plurality of rows of flow guides 23 are arranged at intervals along the second direction Y. The plurality of rows of flow guides 23 increase the flow path of the gaseous working medium, which can reduce the coexistence of the gaseous working medium and the liquid working medium in the same channel and facilitate the backflow of the liquid working medium.

[0070] For reference Figure 9 In some embodiments, the flow guide 23 extends along the extension direction of the partition plate 22 and has a plate structure, or the cross section of the flow guide 23 is circular or regular polygonal.

[0071] For reference Figures 1 to 9 In some embodiments, the condensing channel 211 is arranged through the main body 21 along the first direction X. The heat dissipation device further comprises a cover plate 3 connected to the end of the main body 21 away from the evaporator 1. The orthographic projection of the cover plate 3 on the main body 21 along the first direction X covers the opening of the condensing cavity. The side of the cover plate 3 facing the main body 21 is provided with a flow collection cavity 31 communicating with the condensing cavity. The flow collection cavity 31 allows the ends of the condensing channels 211 away from the containing cavity 111 to communicate with each other, so that the liquid working medium falls through the flow collection cavity 31 and then flows back to the containing cavity 111 along the inner bottom surface of the condensing cavity, thereby reducing the residence of the liquid working medium in the channel. In the case where the partition plate 22 is arranged obliquely downward, the flow collection cavity 31 also provides a path for the flow of the liquid working medium.

[0072] Correspondingly, the power conversion device provided by the embodiments of the present application comprises the heat dissipation device of the above-mentioned embodiments. The power conversion device can be an inverter, a power storage converter (PCS), a motor controller, a charging pile, etc. The heat generated by the device during operation is used as the heat source of the evaporator 1, and the cooling of the device is realized through the phase change of the working medium. The power conversion device can have all the technical features and beneficial effects of the heat dissipation device described above, and will not be described here.

[0073] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0074] The heat dissipation device and the power conversion device provided by the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by using specific examples. The above embodiment descriptions are only used to help understand the technical solutions of the present application and the core ideas thereof. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features thereof can be replaced equivalently. The 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. A heat dissipation device, characterized in that, include: Evaporator (1) having a receiving cavity (111); The condenser (2) includes a main body (21) and a partition (22). The main body (21) has a condensing cavity extending in a first direction (X) on the side facing the evaporator (1). The condensing cavity is connected to the receiving cavity (111). The partition (22) is disposed in the condensation chamber and connected to the main body (21). The partition (22) divides the condensation chamber into a plurality of condensation channels (211) arranged along the second direction (Y). The second direction (Y) intersects the first direction (X). Among the plurality of condensation channels (211), at least one condensation channel (211) is a first channel (2111), and at least another condensation channel (2111) is a second channel (2112). In the second direction (Y), the first channel (2111) is located above the second channel (2112). The maximum dimension of the first channel (2111) along the second direction (Y) is greater than the maximum dimension of the second channel (2112) along the second direction (Y).

2. The heat dissipation device according to claim 1, characterized in that, The number of partitions (22) is provided in multiples, and the multiple partitions (22) are arranged at intervals along the second direction (Y). Among the multiple condensation channels (211), the number of the first channel (2111) and / or the second channel (2112) is provided in multiples.

3. The heat dissipation device according to claim 1, characterized in that, The number of partitions (22) is provided in multiples, and the multiple partitions (22) are arranged at intervals along the second direction (Y). At least a portion of the condensation channels (211) have their maximum dimensions decreasing sequentially from top to bottom along the second direction (Y).

4. The heat dissipation device according to any one of claims 1 to 3, characterized in that, At least a portion of the partition (22) is arranged at an angle to the first direction (X).

5. The heat dissipation device according to claim 4, characterized in that, The condensation chamber includes an inner side surface (212) disposed along the second direction (Y), the inner side surface (212) being located above the partition (22) along the second direction (Y); The distance between the partition (22) and the inner side (212) in the second direction (Y) gradually decreases along the direction of the partition (22) away from the receiving cavity (111).

6. The heat dissipation device according to claim 4, characterized in that, The condensation chamber includes an inner side surface (212) disposed along the second direction (Y), the inner side surface (212) being located above the partition (22) along the second direction (Y); The distance between the partition (22) and the inner side surface in the second direction (Y) gradually increases along the direction away from the receiving cavity (111) of the partition (22); The ends of the plurality of condensation channels (211) away from the receiving cavity (111) are interconnected.

7. The heat dissipation device according to claim 5 or 6, characterized in that, At least one of the condensation channels is a third channel, which is located on the side of the second channel away from the first channel.

8. The heat dissipation device according to any one of claims 1 to 3, characterized in that, The partition (22) extends along the first direction (X).

9. The heat dissipation device according to claim 1 or 2, characterized in that, The condenser (2) further includes a plurality of flow guides (23). At least a portion of the condensation channel (211) is provided with a plurality of flow guides (23). The plurality of flow guides (23) in each condensation channel (211) are arranged in a row along the extension direction of the partition (22), and two adjacent flow guides (23) are spaced apart. The flow guides (23) are connected to the condensation channel (211).

10. The heat dissipation device according to claim 9, characterized in that, Each of the condensation channels (211) includes a first surface (213) and a second surface (214) disposed opposite to each other along the second direction (Y), the first surface (213) being above the second surface (214), and in the second direction (Y), the distance between the flow guide (23) and the first surface (213) is greater than the distance between the flow guide (23) and the second surface (214).

11. The heat dissipation device according to claim 9, characterized in that, The condensation channel (211) is provided with multiple rows of the guide sections (23), which are spaced apart along the second direction (Y).

12. The heat dissipation device according to claim 1 or 2, characterized in that, The condensation channel (211) is provided through the channel along the first direction (X); The heat dissipation device also includes a cover plate (3), which is connected to the end of the main body (21) away from the evaporator (1). The cover plate (3) has a manifold (31) communicating with the condensation chamber on the side facing the main body (21).

13. A power conversion device, characterized in that, Includes the heat dissipation device according to any one of claims 1 to 12.

Images