Heat dissipation device and power conversion equipment

Abstract

The utility model discloses a heat dissipation device and power conversion equipment, the heat dissipation device comprises a shell, a radiator and a fan, the shell is provided with an air inlet and an air outlet, the fan and the radiator are arranged between the air inlet and the air outlet of the shell, the shell comprises a first cavity, a second cavity and a third cavity which are sequentially connected in series, and the first cavity is communicated with the second cavity. The radiator is contained in the second cavity, the fan is arranged in at least one of the first cavity, the second cavity and the third cavity, and an included angle smaller than or equal to 45 degrees is formed between the axis of the fan and the first direction. According to the heat dissipation device, the included angle smaller than or equal to 45 degrees exists between the axis of the draught fan and the first direction, noise transmitted outwards by the draught fan can be weakened based on the sound source directivity of the draught fan, in other words, sound leakage is reduced, and the noise is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of electronic control technology, and in particular, to a heat dissipation device and a power conversion device. Background Art

[0002] In the related art, with the rapid development of new energy products, power conversion devices (such as photovoltaic inverters, energy storage inverters, etc.) are becoming more and more popular. In order to meet the heat dissipation performance inside the power conversion device, a heat dissipation device can be integrated into the power conversion device, and the heat dissipation of the power conversion device is realized through the heat dissipation device.

[0003] However, during the heat dissipation process, the heat dissipation device will generate relatively large aerodynamic noise, resulting in a relatively large working noise of the power conversion device. Utility Model Content

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, an object of the present application is to provide a heat dissipation device with high heat dissipation efficiency and low working noise.

[0005] The present application further provides a power conversion device using the above heat dissipation device.

[0006] In a first aspect, the present application provides a heat dissipation device, including: a housing, a radiator, and a fan. The housing has an air inlet and an air outlet. A fan and a radiator are arranged between the air inlet and the air outlet of the housing. The housing includes a first chamber, a second chamber, and a third chamber connected in series in sequence. The radiator is accommodated in the second chamber. The fan is arranged in at least one of the first chamber, the second chamber, and the third chamber, and the axis of the fan forms an angle less than or equal to 45 degrees with a first direction.

[0007] According to the heat dissipation device of the embodiment of the present application, by making the axis of the fan form an angle less than or equal to 45 degrees with the first direction, based on the sound source directivity of the fan, the noise transmitted outward by the fan can be weakened, that is, the sound leakage can be reduced, so as to effectively reduce the noise.

[0008] According to some embodiments of the present application, the fan is arranged between the air inlet and the radiator, and the fan is located in the first chamber and is arranged in sequence with the radiator in the first direction; or the fan is arranged between the air outlet and the radiator, and the fan is located in the third chamber and is arranged in sequence with the radiator in the first direction; or the fan is arranged between two adjacent radiators, and the two adjacent radiators are arranged in sequence in the first direction, and the fan is located in the second chamber.

[0009] According to some embodiments of the present application, the fan is arranged between two adjacent radiators.

[0010] According to some embodiments of the present application, one end of the radiator extends into the first cavity or into the third cavity.

[0011] According to some embodiments of the present application, the distance L between the first plane where the air inlet side of the fan is located and the surface or end face of the object closest to the first plane is L≥0.5D, and / or the distance L between the second plane where the air outlet side of the fan is located and the surface of the object closest to the second plane is L≥0.5D, where D is the outer diameter of the fan frame.

[0012] In some embodiments, the radiator has a plurality of heat dissipation channels extending in a first direction, and at least one heat dissipation channel has a different length from other heat dissipation channels.

[0013] Furthermore, the lengths of two or more adjacent heat dissipation channels in the radiator increase or decrease in sequence.

[0014] According to some embodiments of the present application, the length Lh of the heat dissipation channel should satisfy l_h = c*(2n - 1) / (2*f^i); where c is the speed of sound, the passing frequency f^i of the fan = i*(N*z) / 60, N is the rotational speed, Z is the number of blades, and i is the order.

[0015] According to some embodiments of the present application, the heat dissipation device further includes: a deflector plate, which is disposed in the first cavity and / or the second cavity, and the deflector plate is configured as an arc plate, a curved surface plate or a bent plate.

[0016] Furthermore, there is a gap between the deflector plate and the housing to form a sound absorption cavity, and at least one sound absorption hole is provided on the deflector plate to communicate the sound absorption cavity with the first cavity or the second cavity.

[0017] Furthermore, the heat dissipation device further includes: a sound absorption member, which is disposed in the sound absorption cavity and is connected to the housing.

[0018] In a second aspect, the present application provides a power conversion device, including: a heat dissipation device, a box body, and a power conversion module. The power conversion module is disposed in the box body, the box body is connected to the housing of the heat dissipation device, and the radiator is used to conduct the heat in the box body into the heat dissipation device.

[0019] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 is a schematic diagram of a power conversion device according to an embodiment of the present application;

[0022] Figure 2 is a cross-sectional schematic diagram of a power conversion device according to an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a heat dissipation device according to the first embodiment of the present application;

[0024] Figure 4 is a schematic diagram of a heat dissipation device according to the second embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a heat dissipation device according to the third embodiment of the present application;

[0026] Figure 6 is a schematic diagram of a heat dissipation device according to the fourth embodiment of the present application;

[0027] Figure 7 is a cross-sectional schematic diagram of a heat dissipation device according to the fourth embodiment of the present application;

[0028] Figure 8 is a schematic diagram of a heat dissipation device according to the fifth embodiment of the present application;

[0029] Figure 9 is a cross-sectional schematic diagram of a heat dissipation device according to the fifth embodiment of the present application;

[0030] Figure 10 is a schematic diagram of a radiator according to an embodiment of the present application;

[0031] Figures 11 - 14 is a schematic diagram of the arrangement angle of a fan according to an embodiment of the present application;

[0032] Figure 15 is a schematic diagram of the architecture of a heat dissipation device according to an embodiment of the present application.

[0033] Reference numerals:

[0034] Power conversion device 100,

[0035] Heat dissipation device 10, housing 11, air inlet 111, air outlet 112, first baffle 113, second baffle 114, side plate 115, top side plate 115a, bottom side plate 115b, body plate 116, radiator 12, sub-radiator 121, heat dissipation pipe 122, fan 13, guide plate 14, sound absorption hole 141, sound absorption member 15,

[0036] Box body 20, first opening 21,

[0037] Power conversion module 30,

[0038] The first cavity a, the second cavity b, the third cavity c, the sound-absorbing cavity d, the axis of the fan e, the extension line of the projection boundary f, the virtual demarcation line g, the included angle h, the first plane i, the second plane j,

[0039] The first direction X, the second direction Y. Detailed implementation manners

[0040] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those skilled in the technical field to which the present application belongs; the terms used in the description of the present application in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the specification and claims of the present application or the above drawings are used to distinguish different objects and are not used to describe a specific order or primary-secondary relationship.

[0042] Referring to "embodiments" in the present application means that specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0043] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "attached" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0044] The term " / and" in the present application is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present application generally represents an "or" relationship between the front and rear associated objects.

[0045] In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thicknesses, lengths, widths, etc. of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width, etc. of the integrated device, are only for illustrative purposes and should not constitute any limitation to the present application.

[0046] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0047] In the description of the present application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0048] In the description of the present application, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0049] "Plurality" as used in the present application means two or more (including two).

[0050] It should be noted that the power conversion device may be a single power device or an electronic control unit such as an AC converter, an inverter (photovoltaic inverter), a relay, a power device, etc., and is fixed at a suitable position in the box body, or may be an integration of multiple electronic control units such as an AC converter, a relay, and a power device. After integration, it is fixed at a suitable position in the box body, and a heat dissipation device is further arranged in the box body to cool down the power conversion device through the heat dissipation device.

[0051] In the prior art, the heat dissipation solution in the box body is an external circulation air-cooled heat dissipation solution. With the increase of the power density, the heat inside the power conversion device also increases significantly, which puts higher requirements on the heat dissipation efficiency and heat dissipation effect of the heat dissipation device for external circulation air cooling. In order to improve the heat dissipation efficiency and heat dissipation effect, the heat dissipation power of the heat dissipation system is getting higher and higher. The higher heat dissipation power results in a greater working noise of the heat dissipation device, especially a greater pneumatic noise, which affects the user experience.

[0052] Based on this, the present application proposes a heat dissipation device, which can reduce the working noise of the heat dissipation device on the premise of meeting the heat dissipation requirements, so as to improve the user experience.

[0053] Next, the heat dissipation device 10 and the power conversion device 100 according to the embodiments of the present application will be described with reference to the accompanying drawings.

[0054] In a first aspect, the heat dissipation device 10 according to the embodiment of the present application includes: a housing 11, a radiator 12, and a fan 13. The housing 11 has an air inlet 111 and an air outlet 112. A fan 13 and a radiator 12 are arranged between the air inlet 111 and the air outlet 112 of the housing 11. The housing 11 includes a first chamber a, a second chamber b, and a third chamber c connected in series in sequence; the radiator 12 is accommodated in the second chamber b, and the fan 13 is arranged in at least one of the first chamber a, the second chamber b, and the third chamber c. An angle h less than or equal to 45 degrees exists between the axis of the fan 13 and the first direction (see Figure 11 , Figure 12 , Figure 13 and Figure 14 shown).

[0055] Wherein, the housing 11 has an air inlet 111 and an air outlet 112. Both the air inlet 111 and the air outlet 112 are communicated with the external environment, and the radiator 12 is arranged in the housing 11 and is used for dissipating heat from the internal environment, so as to realize the external circulation air-cooling of the heat dissipation device 10.

[0056] The housing 11 is divided into a first chamber a, a second chamber b, and a third chamber c arranged in sequence along the first direction (as Figure 15 shown). The air inlet 111 is formed in one of the first chamber a or the third chamber c, and the air outlet 112 is formed in the other of the first chamber a and the third chamber c. The radiator 12 can be arranged in the second chamber b, and the air inlet 111 and the air outlet 112 can be located on the same side or both sides of the housing 11, and both the air inlet 111 and the air outlet 112 are adapted to be communicated with the external environment, so that the air flow can enter the housing 11 from the air inlet 111 and flow out from the air outlet 112, and heat exchange with the heat exchanger 12 located in the housing 11 can be realized.

[0057] As Figure 1 and Figure 2 shown, the housing 11 is arranged in the box body 20, and the accommodating space (i.e., the internal environment) of the box body 20. The power conversion module 30 is arranged in the accommodating space. During the working process of the power conversion module 30, the generated heat causes the temperature in the accommodating space to rise, and the radiator 12 can exchange heat with the accommodating space. At the same time, the air inlet 111, the air outlet 112, and the fan 13 generate an air flow flowing through the radiator 12 to realize the cooling of the radiator 12.

[0058] Of course, the accommodation space can also achieve convective heat exchange with the external environment through the heat dissipation device 10, which will not be elaborated here.

[0059] Specifically, the housing 11 can be generally in the shape of a prism, and the direction of the side surface of the prism is the first direction of the present application. Taking the first direction of the present application as the height direction, the first chamber a, the second chamber b, and the third chamber c are arranged in sequence in the height direction, and the first chamber a, the second chamber b, and the third chamber c are connected in sequence, that is, the first chamber a is connected to the second chamber b, and the second chamber b is connected to the third chamber c.

[0060] Furthermore, an air inlet 111 can be provided on the first chamber a, and an air outlet 112 can be provided on the third chamber c, so that the airflow generated by the fan 13 can flow from the first chamber a to the second chamber b, and after completing heat exchange with the radiator 12, it can flow out through the third chamber c. Or an air inlet 111 can be provided on the third chamber c, and an air outlet 112 can be provided on the first chamber a, so that the airflow generated by the fan 13 can flow from the third chamber c to the second chamber b, and after completing heat exchange with the radiator 12, it can flow out through the first chamber a.

[0061] It can be understood that the fan 13 can be arranged in at least one of the first chamber a, the second chamber b, or the third chamber c. For example, the fan 13 is arranged in the first chamber a, the fan is arranged in the second chamber b, the fan 13 is arranged in the third chamber c, or there are multiple fans 13, at least one fan 13 can be arranged in any chamber, and fans 13 can be arranged in multiple chambers. The present application does not make specific limitations.

[0062] It should be noted that in the heat dissipation device 10 of the present application, during the operation of the fan 13, a relatively large working noise will be generated, and during the process of the airflow flowing between the first chamber a, the second chamber b, and the third chamber c, a relatively large aerodynamic noise will also be generated, affecting the use experience.

[0063] The inventor of the present application has found through research that the airflow disturbed by the fan 13 enters from the air inlet 111, flows through the air inlet side and the air outlet side in sequence, and then flows out from the air outlet 112. The noise during the operation of the fan 13 is transmitted from the air inlet side to the air outlet side, that is, the sound source of the fan 13 has directivity. Furthermore, the directivity of the sound source can be utilized to weaken the noise transmitted by the fan 13 to the outside through structural settings.

[0064] Based on this, the present application further makes the angle h between the axis of the fan 13 and the first direction less than or equal to 45 degrees.

[0065] See Figure 11 、 Figure 12 、 Figure 13 and Figure 14As shown, the inclined rectangle in the figure is the fan 13, and the housing 11 is in a frame shape in the figure and has an opening. The opening is at Figure 11 and Figure 12 In the embodiments shown, it is configured as the air inlet 111. At Figure 13 and Figure 14 In the embodiments shown, it is configured as the air outlet 112. The figure further marks the air flow direction, the first direction X, the axis direction of the fan 13, that is, the fan axis e, and the extended line f of the projection boundary of the fan 13.

[0066] Combined with Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the axis of the fan 13 refers to the virtual straight line that is far from the center line of the fan at the midpoint of the end face of the fan 13 facing the outside. And the angle h between the axis of the fan 13 and the first direction being less than or equal to 45 degrees means that the fan 13 can be inclined and arranged in the housing 11 so that the projection of the fan 13 along its own axis projects onto the upper contour of the housing 11 and partially overlaps with the area where the air inlet 111 is located or the area where the air outlet 112 is located, or is located outside the area where the air inlet 111 is located or the area where the air outlet 112 is located. And the partial overlap means that the overlapping part accounts for less than 45% of the overall contour size of the fan 13.

[0067] Based on Figures 11 - 14 It can be known that the first chamber a, the second chamber b, and the third chamber c in the housing 11 of the present application are arranged in sequence in the first direction, and the angle h between the axis of the fan 13 and the first direction can be less than or equal to 45°, such as: 0°, 20°, 30°, 45°, etc.

[0068] For example, when the angle h between the axis of the fan 13 and the first direction is 0°, the fan 13 is horizontally arranged, and the fan 13 drives the air flow to flow in the vertical direction, that is, the first direction. When the angle h between the axis of the fan 13 and the first direction is not 0°, it has the inclined directions as shown in Figure 13 and as shown in Figure 14 . Specifically, as shown in Figure 13 and Figure 14 , the air outlet 112 is located on the right side. In Figure 13 , the fan 13 is arranged with the air outlet side facing the air outlet 112; Figure 14 In, the fan 13 is arranged with the air outlet side facing away from the air outlet 112. It should be emphasized that Figure 13 The inclined direction shown is more conducive to the inflow or outflow of the air flow, and Figure 14 The direction shown is more conducive to noise reduction and sound absorption.

[0069] In this way, at least part of the air inlet side of the fan 13 can be shielded by the housing 11, or at least part of the air outlet side of the fan can be shielded by the housing 11. The air inlet side of the fan 13 refers to the end face of the fan facing the direction of the air flow. Similarly, the air outlet side of the fan 13 refers to the end face of the fan facing the direction away from the air flow.

[0070] As Figure 11 and Figure 13 shown, when the air flow flows from top to bottom in the first direction, the upper end face of the fan 13 is the air inlet side, and the lower end face of the fan 13 is the air outlet side; similarly, as Figure 12 and Figure 14 shown, when the air flow flows from bottom to top in the first direction, the lower end face of the fan 13 is the air inlet side, and the upper end face of the fan 13 is the air outlet side. That is to say, in this application, at least one group of the air inlet side and the air inlet 111, and the air outlet side and the air outlet 112 is configured to be at least partially staggered.

[0071] Among them, the air inlet side and the air inlet 111 are defined as the first group, the air outlet side and the air outlet 112 are defined as the second group, and at least one group being configured to be at least partially staggered means that in some embodiments, the air inlet side and the air inlet 111 in the first group are at least partially staggered; in other embodiments, the air outlet side and the air outlet 112 in the second group are at least partially staggered; in still other embodiments, both the air inlet side and the air inlet 111 in the first group and the air outlet side and the air outlet 112 in the second group are at least partially staggered.

[0072] It should be noted that at least partially staggered means that the plane where the air inlet side is located is not directly opposite to the plane where the air inlet 111 is located, and they can be partially staggered or completely staggered; or there is an included angle between the aforementioned two planes, and the air outlet side and the air outlet 112 are not directly opposite, and they can be partially staggered or completely staggered; or there is an included angle between the plane where the air outlet side is located and the plane where the air outlet is located.

[0073] According to the heat dissipation device 10 of the embodiment of the present application, by making the included angle h between the axis of the fan 13 and the first direction less than or equal to 45 degrees, based on the sound source directivity of the fan 13, the noise transmitted outward by the fan 13 can be weakened, that is, the sound leakage can be reduced, so as to effectively reduce the noise.

[0074] Furthermore, in combination with Figure 3 , Figure 4 and Figure 5 shown, the air inlet 111 and the air outlet 112 are located on the same side of the housing 11 in the second direction, and the first direction and the second direction have an included angle, so that the air inlet side and the air inlet 111 are staggered, and the air outlet side and the air outlet 112 are staggered.

[0075] See Figure 11 , Figure 12 ,Figure 13 and Figure 14 As shown in Figure 14 , the straight lines on both sides of the fan 13 are the extended projection boundaries f, forming a columnar projection area along the axis of the fan 13. Only part of this columnar area coincides with the air outlet 112 or the air inlet 111 in Figure 11 and Figure 13 , and in Figure 12 and Figure 14 , this area does not coincide with the air inlet 111 or the air outlet 112. Figure 11 and Figure 13 Figure 11 and Figure 13 , only part of it coincides with the air outlet 112 or the air inlet 111, and in Figure 12 and Figure 14 , this area does not coincide with the air inlet 111 or the air outlet 112. Figure 12 and Figure 14 Figure 12 and Figure 14 , this area does not coincide with the air inlet 111 or the air outlet 112.

[0076] That is to say, in the present application, further through the structural setting of the fan 13, the air inlet side and the air outlet side of the fan 13 are located in the first direction, the air inlet 111 and the air outlet 112 of the housing 11 are located in the second direction, and the first direction and the second direction form an angle, such as the first direction and the second direction are orthogonal, so that the emitted noise can be at least partially blocked by obstacles, reducing the fan noise directly emitted from the air outlet 112 or the air inlet 111, so as to reduce sound leakage and effectively reduce noise.

[0077] That is to say, in the present application, further through the structural setting of the fan 13, the air inlet side and the air outlet side of the fan 13 are located in the first direction, the air inlet 111 and the air outlet 112 of the housing 11 are located in the second direction, and the first direction and the second direction form an angle, such as the first direction and the second direction are orthogonal, so as to reduce sound leakage and effectively reduce noise.

[0078] Therefore, the air outlet 112 and the air inlet 111 of the housing 11 need to be located in the second direction that forms an angle with the first direction (for example: if the first direction is the length direction shown in the figure, then the second direction is the width direction perpendicular to the first direction), so that the air inlet side and the air outlet side of the fan can be in different directions from the air inlet 111 and the air outlet 112, so as to separate the direction of the sound source from the air inlet 111 and the air outlet 112 through the structural setting, so as to reduce sound leakage and improve the working noise.

[0079] Of course, the positions of the air outlet 112 and the air inlet 111 in the embodiments of the present application are not limited to this, and in some other embodiments, obstacles can also be set to block in the directivity direction based on the sound source directivity, such as through the radiator 12, the housing 11, etc. to reduce noise.

[0080] It can be understood that the distance L from the first plane i where the air inlet side of the fan 12 is located to the surface or end face of the object closest to the first plane i is ≥ 0.5D, and / or the distance L from the second plane j where the air outlet side of the fan 13 is located to the surface of the object closest to the second plane j is ≥ 0.5D, where D is the outer diameter of the fan frame of the fan 13.

[0081] Among them, as Figure 2As shown, the first plane i refers to one side surface of the fan frame that defines the air inlet side, and the second plane j refers to one side surface of the fan frame that defines the air outlet side. In other words, the planes on both sides of the axis of the fan 13 of the fan frame are respectively defined as the first plane i and the second plane j. The first plane i is on the air inlet side, and the second plane j is on the air outlet side.

[0082] In Figure 7 , both the first plane i and the second plane j are horizontal planes. The outer diameter of the fan frame of the fan 13 being D means that a circular or rectangular frame is formed on the outside of the fan 13, and this frame is defined as the fan frame. The outer diameter of the fan frame refers to the diameter of the circular frame or the diameter of the inscribed circle of the rectangular frame. The air flow generated by the fan 13 flows in the first direction, and on the air inlet side and the air outlet side of the fan 13, the housing 11 and / or the radiator 12 can both be formed as the object closest to the first plane i or the second plane j, that is, formed as an obstacle blocking the air flow, and the distance between the obstacle and the air inlet side of the fan 13, or the distance between the obstacle and the air outlet side of the fan 13 is L, and L≥0.5D is satisfied.

[0083] That is to say, in this application, the outer diameter of the fan 13 is D, the distance between the fan 13 and the obstacle in the first direction is L, and L≥0.5D is satisfied, that is, the distance L1 between the air inlet side and the obstacle closest to the air inlet side (such as: the plate body of the housing 11, the radiator 12) is L1≥0.5D, and the distance L2 between the air outlet side and the obstacle closest to the air outlet side (such as: the plate body of the housing 11, the radiator 12) is L2≥0.5D, so that both the air inlet side and the air outlet side of the fan 13 are directly opposite to the heat dissipation channels of the radiator 12. When the fan 13 generates sound waves with different frequencies on the air inlet side and the air outlet side and propagates to the heat dissipation channels of the radiator 12, the heat dissipation channels of the radiator 12 can be used to generate a cavity resonance frequency, and local resonance with the sound waves generated by the fan 13 can be generated to increase the attenuation of the sound waves, so as to reduce the aerodynamic noise radiated by the fan 13 to the outside.

[0084] It should be emphasized that Figure 7 the up and down direction is the first direction, and the left and right direction is the second direction. At this time, the fan 13 is horizontally arranged, and the object closest to the first plane i or the second plane j at this time refers to the object with the smallest vertical distance to the first plane i or the second plane j. For example, in Figure 7 , the first cavity a intakes air, and the third cavity c discharges air. Then the horizontal plane where the upper edge of the fan 13 is located is the first plane i, and the horizontal plane where the lower edge of the fan 13 is located is the second plane j. At this time, L1 is the distance between the first plane i and the top wall (top side plate 115a) of the first cavity a parallel to the first plane i; L2 is the distance between the second plane j and the upper end face of the radiator 12.

[0085] Such as Figure 9As shown, the horizontal plane where the upper edge of the fan 13 is located is the first plane i, and the horizontal plane where the lower edge of the fan 13 is located is the second plane j. At this time, L2 is the distance between the horizontal bottom wall (bottom side plate 115b) of the air outlet 112 of the second plane j; L1 is the distance between the first plane i and the lower end surface of the radiator 12.

[0086] It can be understood that the distance between the fan 13 and the obstacle in the first direction is L. In the first direction, the fan has an air inlet side and an air outlet side. The distance between the air inlet side of the fan 13 and the obstacle is defined as L1, and the distance between the air outlet side of the fan 13 and the obstacle is L2. Both L1 and L2 are L.

[0087] The above is only an example. The heat dissipation device can have other setting methods, but the principle is the same.

[0088] As Figure 10 shown, the length of the heat dissipation channel refers to the total distance that the air flow flows from one end of the heat dissipation channel to the other end, including but not limited to the straight-line distance between the two ends of the heat dissipation channel, and can also be the length when the heat dissipation channel can be in a straight shape, an arc shape, an S shape, etc.

[0089] In this way, the distance between the air inlet side of the fan 13 and the air inlet side obstacle, and the distance between the air outlet side of the fan 13 and the air outlet side obstacle can be further controlled. The resonance effect can be achieved by using the obstacles on both the air inlet side and the air outlet side to improve the attenuation effect of the sound wave and reduce the aerodynamic noise radiated by the fan 13 to the outside.

[0090] As Figure 15 shown, the virtual dividing line g is used to divide the first chamber a, the second chamber b, and the third chamber c. To improve the heat dissipation effect, the fan 13 can be arranged between the air inlet 111 and the radiator 12 (see 3° and 5° in Figure 15 ), the fan 13 can also be arranged between the adjacent air outlet 112 and the radiator 12 (see 1°, 2°, and 4° in Figure 15 ), the fan 13 can also be arranged between two adjacent radiators 12 (see Figure 4 ), and one end of the radiator 12 can extend from the second chamber b to the first chamber a (see 2° in Figure 15 ), or extend from the second chamber b to the third chamber c (see 3° in Figure 15 ).

[0091] That is to say, the air inlet 111 in the embodiment of the present application can be formed as a direct air inlet or a side air inlet, and the air outlet 112 can be formed as a side air outlet or a direct air outlet, that is, Figure 15 in 4°, the top notch is the air inlet 111, in 5°, the low-end outlet is the air outlet 112, the large rectangular frame is the radiator 12, and the small rectangular frame is the fan 13.

[0092] It should be noted that the blower 13 can be arranged in the first chamber a, the second chamber b or the third chamber c. The number of blowers 13 can be multiple. The blowers 13 can be arranged in the first chamber a, the second chamber b and the third chamber c simultaneously, or only one of them can be provided with a blower 13. The blower 13 can be arranged on the housing 11 through its own mounting frame. The housing 11 has a first baffle 113 that separates the first chamber a and the second chamber b, and a second baffle 114 that separates the second chamber b and the third chamber c. The housing 11 itself includes side plates 115 on both sides in the first direction (such as the upper side and the lower side), and body plates 116 on both sides in the second direction. An air inlet 111 and an air outlet 112 are defined between the body plate 116 and the side plate 115. The radiator 12 can be one, or there can be multiple radiators 12. Multiple radiators 12 are arranged in sequence in the second chamber b in the first direction, and are all defined as sub-radiators 121. The radiator 12 can also extend to the first chamber a or the third chamber c.

[0093] As Figure 3 and Figure 7 shown, in the first embodiment, according to some embodiments of the present application, the blower 13 is arranged in the first chamber a, and both sides of the blower 13 in the first direction are spaced apart from the side plate 115 of the housing 11 and the radiator 12 located in the second chamber b respectively.

[0094] That is to say, in the first embodiment, the blower 13 is located between the radiator 12 and the air inlet 111, and can be located in the first chamber a. The object (obstacle) closest to the first plane i can be the side plate 115 of the housing 11, and the object closest to the second plane j can be the first baffle 113. That is, an installation plate can be arranged inside the first chamber a, and the blower 13 is fixed on the installation plate through the mounting frame. An air duct chamber is defined between the installation plate and the first baffle 113, and the air duct chamber communicates with the second chamber b where the radiator 12 is located. The obstacles on both sides of the blower 13 in the first direction (i.e., the upper and lower sides) are the side plate 115 and the first baffle 113 respectively, and below the first baffle 113 is the radiator 12. Correspondingly, resonance noise elimination can be achieved through the radiator 12 on the lower side, effectively reducing the working noise and improving the use experience.

[0095] As Figure 4 shown, according to some embodiments of the present application, the blower 13 is arranged in the second chamber b. The blower 13 is located at one end of the second chamber b adjacent to the first chamber a, and both sides of the blower 13 in the first direction are spaced apart from the radiator 12 and the first baffle 113 between the first chamber a and the second chamber b respectively; or the blower 13 is located at one end of the second chamber b adjacent to the third chamber c, and both sides of the blower 13 in the first direction are spaced apart from the radiator 12 and the side plate 115 of the housing 11 respectively.

[0096] The blower 13 can be located within the second chamber b and on the side of the second chamber b adjacent to the first chamber a. That is, in the embodiment where there is one radiator 12 and it is disposed within the second chamber b, and the blower 13 is also disposed within the second chamber b, the blower 13 can be located on the side of the radiator 12 adjacent to the first baffle 113. An installation plate can be provided inside the second chamber b, and the blower 13 is fixed to the installation plate through an installation frame. The obstacles on both sides of the blower 13 in the first direction (i.e., the upper and lower sides) are respectively the radiator 12 (the object closest to the first plane i) and the first baffle 113 (the object closest to the second plane j). By making the distance between the first baffle 113 and the blower 13 and the distance between the radiator 12 and the blower 12 satisfy the above-mentioned dimensional relationship, resonance noise reduction can be achieved through the radiator 12 on the lower side, effectively reducing the working noise and improving the user experience.

[0097] The blower 13 can also be located on the side of the radiator 12 adjacent to the second baffle 114. The obstacles on both sides of the blower 13 in the first direction (i.e., the upper and lower sides) are respectively the radiator 12 (the object closest to the first plane i) and the second baffle 114 (the object closest to the second plane j). Correspondingly, resonance noise reduction can be achieved through the radiator 12 on the upper side, effectively reducing the working noise and improving the user experience.

[0098] As Figure 4 shown, in the second embodiment, according to some embodiments of the present application, the blower 13 is disposed in the second chamber b, and the radiator 12 includes: a plurality of adjacent sub-radiators 121. The blower 13 is located between the adjacent sub-radiators 121, and the obstacles include: two sub-radiators 121 located on both sides of the blower 13.

[0099] That is to say, two adjacent radiators 12 are arranged in sequence in the first direction, and the blower 13 can also be located between the two adjacent radiators 12. It can be located within the second chamber b, and the object (obstacle) closest to the first plane i can be one radiator 12, and the object closest to the second plane j can be another radiator 12.

[0100] Of course, it should be noted that the number of radiators 12 can be multiple, and the multiple radiators 12 can be arranged in multiple directions such as the first direction and the second direction, and the blower 12 is disposed between two adjacent radiators 12 arranged in sequence in the first direction.

[0101] Specifically, in Figure 4 , the first chamber a intakes air, and the third chamber c exhausts air. Then, the horizontal plane where the upper edge of the blower 13 is located is the first plane i, and the horizontal plane where the lower edge of the blower 13 is located is the second plane j. At this time, L1 is the distance between the first plane i and the lower end face of the radiator 12 located above the blower 13; L2 is the distance between the second plane j and the upper end face of the radiator 12 located below the blower 13.

[0102] Exemplarily, in order to restrict the flow direction of the air flow and achieve the effect of increasing the flow rate, a mounting plate 117 is provided in the second chamber b. The mounting plate 117 can be arranged horizontally in the housing 11 or inclinedly arranged in the housing 11. The mounting plate 117 can be arranged parallel to or at an angle with the baffles (such as the first baffle 113 and the second baffle 114) between adjacent chambers, and is adapted to divide the second chamber b into two sub-chambers. One or more sub-radiators 121 can be arranged in each of the two sub-chambers, and a fan 13 or a radiator 12 can be mounted on the mounting plate 117. The fan 13 can be one or more. The obstacle above the air inlet side of the fan 13 is the upper sub-radiator 121 (the object closest to the first plane i), and the obstacle below the air outlet side of the fan 13 is the lower sub-radiator 121 (the object closest to the second plane j), so as to achieve resonance noise reduction through the sub-radiator 121 and effectively reduce the working noise.

[0103] Of course, the structure of the radiator 12 in the second chamber b is not limited to this. In some other embodiments, a plurality of sub-radiators 121 arranged in sequence in the first direction, the fan 13 is located between two sub-radiators 121, and both sides of the fan 13 in the first direction are spaced apart from the two sub-radiators 121 respectively.

[0104] That is to say, there are multiple sub-radiators 121, such as three. The three sub-radiators 121 are arranged in sequence in the first direction, and the fan 13 can be arranged between the first and the second of the three sub-radiators 121, or between the second and the third, and the air inlet side of the fan 13 is spaced apart from one sub-radiator 121, and the air outlet side is spaced apart from another sub-radiator 121, so as to achieve the same resonance noise reduction effect as the above embodiments.

[0105] Such as Figure 5 As shown, in the third embodiment, in some embodiments, the fan 13 is arranged in the third chamber c, and both sides of the fan 13 in the first direction are spaced apart from the radiator 12 and the second baffle 114 between the second chamber b and the third chamber c respectively.

[0106] That is to say, in the third embodiment, the fan 13 is located between the air outlet 112 and the radiator 12. An installation plate can be arranged inside the third chamber c, and the fan 13 is fixed on the installation plate through an installation frame. The obstacles on both sides of the fan 13 in the first direction (i.e., the upper and lower sides) are respectively the side plate 115 (the object closest to the first plane i) and the radiator 12 on the second baffle 114 (the object closest to the second plane j). Correspondingly, resonance noise reduction can be achieved through the upper radiator 12, effectively reducing the working noise and improving the use experience.

[0107] In summary, the number and positions of the fans 13, as well as the number and positions of the radiators 12, can be reasonably set to achieve resonance noise cancellation of the fans 13, reduce the operating noise of the heat dissipation device 10, and improve the user experience.

[0108] As Figure 10 shown, in some embodiments, the radiator 12 has a plurality of heat dissipation channels extending in a first direction, and at least one heat dissipation channel has a different length from other heat dissipation channels, e.g., the lengths of the plurality of heat dissipation channels are staggeredly arranged.

[0109] Exemplarily, the lengths of two adjacent heat dissipation channels are the same, or the lengths of two adjacent heat dissipation channels are different, and the lengths of the plurality of heat dissipation channels can be successively longer, successively shorter, where some lengths are equal, some lengths are unequal, and all are unequal.

[0110] Among them, the radiator 12 can be configured to include a plurality of heat dissipation tubes 122, and each heat dissipation tube 122 defines a heat dissipation channel, and the lengths of the plurality of heat dissipation channels are staggeredly arranged.

[0111] Specifically, one end of the plurality of heat dissipation tubes 122 of the radiator 12 is formed as a gas inlet, and one end is formed as a gas outlet, and the distance between the gas outlet and the gas inlet is the length of the heat dissipation channel. The length Lh of the heat dissipation channel should satisfy l_h = c*(2i - 1) / (2*f^i); where c is the speed of sound, the passing frequency f^i of the fan = i*(N*z) / 60, N is the rotational speed, Z is the number of blades, and i is the order.

[0112] It should be noted that the outer diameter of the fan frame of the fan 13 is D (mm), the rotational speed is N (rpm), and the number of blades is z (pieces). The passing frequency f^i of the fan 13 can be determined as f^i = i*(N*z) / 60, the i-th order, i = 1, 2, 3..., i is a positive integer, and the length of the heat dissipation channel defined by each heat dissipation channel is Lh (mm), and the cross-sectional area of the heat dissipation channel is S (mm2). Then, if it is necessary to reduce the passing frequency of the i-th order of the fan 13, it is necessary to control the resonance frequency of the heat dissipation channel to correspond to the passing frequency f^i of the fan 13 at this order. Then the designed length Lh of the pipeline = (c*(2i - 1)) / ((2*i*(N*z) / 60)). Since the lengths of the plurality of heat dissipation channels are different, their resonance frequencies are also different. The combination of multiple heat dissipation channels can have multiple resonance frequencies, and the adjacent resonance frequencies are coupled with each other, thereby forming a certain range of noise cancellation frequency bands to effectively eliminate the noise in the corresponding frequency bands.

[0113] In this way, on the one hand, the distances between the air inlet side and the air outlet side of the fan 13 from the obstacles are limited, which can effectively reduce the secondary noise generated by the fan 13; on the other hand, the pipe length of the heat dissipation channel can be designed so that the cavity resonance frequency \(f_n^i\) of the heat dissipation channel corresponds to the passing frequencies \(f^i\) of different orders of the fan 13, achieving the effect of resonance noise reduction.

[0114] Since the above-mentioned pipe lengths are different, their cavity characteristic frequencies are also different. The channels of the radiator 12 composed of multiple pipes have multiple cavity resonance frequencies, and the resonance frequencies of adjacent heat dissipation channels are coupled with each other, forming a noise reduction frequency band within a certain range, which can effectively reduce the noise of the corresponding frequency band of the fan 13.

[0115] Furthermore, the heat dissipation channels can be divided into multiple groups in the arrangement direction. The lengths of the heat dissipation channels in each group are the same, the lengths of the heat dissipation channels in adjacent groups are different, and the number of heat dissipation channels in each group of heat dissipation channels is at least one.

[0116] Specifically, each heat dissipation channel group can have one, two or three heat dissipation channels, and the lengths of the heat dissipation channels in each group are the same, while the lengths of the heat dissipation channels in adjacent groups are different. For example, the length of the first group of heat dissipation channels is 100 mm and the number is two, and the length of the second group of heat dissipation channels arranged on one side of the first group of heat dissipation channels is 110 mm and the number is three.

[0117] Thus, the lengths of the heat dissipation channels can be set staggeredly, and the heat dissipation channels with different lengths achieve noise reduction frequency bands of different frequencies to improve the noise reduction effect.

[0118] Figure 8 As shown, according to some embodiments of the present application, the heat dissipation device 10 further includes: a deflector 14, the deflector 14 is disposed in the first chamber a and / or the second chamber b, and the deflector 14 is configured as an arc-shaped plate, a curved surface plate or a bent plate.

[0119] Specifically, the deflector 14 can be configured as a bent plate and can be fixed on the side plate 115 of the first chamber a or the side plate 115 of the third chamber c through fasteners. In Figure 8 In the fifth embodiment shown, the deflector 14 can be configured as an arc-shaped plate, so as to reduce the internal eddy currents generated in the first chamber a or the third chamber c during the gas flow process through the bent surface, arc surface or curved surface of the deflector 14 itself. Fewer internal eddy currents can improve the air flow smoothness and reduce the eddy current noise.

[0120] Furthermore, there is a gap between the deflector 14 and the housing 11 to form a sound-absorbing cavity d, and at least one sound-absorbing hole 141 is opened on the deflector 14 to communicate the sound-absorbing cavity d with the first chamber a or with the second chamber b.

[0121] For example, the deflector 14 is formed as an arc-shaped plate, and the area where the main plate 116 and the side plate 115 are connected defines an edge. The arc-shaped plate can be bent toward or away from the edge, and one end of the deflector 14 is connected to the main plate 116, and the other end is connected to the side plate 115. The area where the arc-shaped plate is separated from the main plate 116 and the side plate 115 (i.e., the gap between the shell 11 and the deflector 14) defines a silencer cavity (see Figure 9 shown).

[0122] Therefore, a silencer cavity d is set on the guide plate 14, and a silencer hole 141 is opened. That is to say, the guide plate 14 can be a continuous plurality of bent planes, arc surfaces or irregular planes, and silencer holes 141 of any shape and any number are set thereon, so that at least part of the airflow can enter the silencer cavity d through the silencer holes 141, and the structure of the silencer cavity d is used to generate local resonance, and then through the principle of local resonance, the noise propagated outward by the fan 13 is reduced, the aerodynamic noise is further reduced, and the user experience is improved.

[0123] That is to say, by setting the guide plate 14, on the one hand, the gas smoothness can be improved and the eddy noise can be reduced. On the other hand, the resonance silencing can be achieved through the silencing cavity d to further reduce the aerodynamic noise.

[0124] Further, see Figure 6 、 Figure 7 and Figure 9 As shown, the heat dissipation device 10 further includes a silencer 15 , which is disposed in the silencer cavity d and connected to the housing 11 .

[0125] Specifically, if Figure 6 and Figure 7 As shown, in the fourth embodiment, a muffler 15 is provided on the side plate 115 of the first chamber a or the side plate 115 of the third chamber c. The muffler 15 can be attached to the top surface and side surface of the first chamber a or the third chamber c by bonding or fixing with fasteners, as shown in FIG. Figure 9 In the fifth embodiment shown, silencers 15 are provided in the silencer chambers d of the first chamber a and the third chamber c to further enhance the silencer effect and weaken the secondary turbulence noise generated by the fan 13 .

[0126] The heat dissipation device 10 of the embodiment of the present application, first, by reasonably setting the distance between the fan 13 and the obstacle, and reasonably setting the relative positions of the air inlet and air outlet sides of the fan 13 and the air inlet 111 and the air outlet 112 of the shell 11, the distance between the air inlet and air outlet sides of the fan 13 and the obstacle wall is reasonable, which can effectively reduce the secondary noise generated by the fan 13.

[0127] Furthermore, the design of the pipe length of the 122 heat dissipation pipes can achieve the effect of resonance noise reduction. At the same time, from a structural perspective, the fan 13 can be placed along the first direction. By utilizing the directivity of the sound source of the fan 13, the noise transmitted outward by the fan 13 can be weakened. And a diversion structure with the function of resonance noise reduction can be arranged inside. Through holes are arranged on the surface of the diversion structure, which can effectively reduce the generation of eddy currents inside the air duct, reduce the eddy current noise. Moreover, the diversion plate 14 and the air duct form a sound absorption cavity d structure, which can utilize the principle of local resonance to reduce the noise transmitted outward by the fan 13.

[0128] In a second aspect, as Figure 1 and Figure 2 shown, the present application provides a power conversion device 100, including: a heat dissipation device 10, a box body 20, and a power conversion module 30. The power conversion module 30 is arranged in the box body 20. The box body 20 is connected to the housing 11 of the heat dissipation device 10. The radiator 12 is used to conduct the heat in the box body 20 into the heat dissipation device 10.

[0129] According to the power conversion device 100 of the embodiment of the present application, by adopting the above heat dissipation device 10, effective heat exchange between the power conversion module 30 in the accommodation space of the box body 20 and the heat dissipation device 10 is realized. While improving the heat exchange efficiency, the working noise of the heat dissipation device 10, especially the aerodynamic noise of the fan 13, is smaller, which can improve the use experience of the power conversion device 100.

[0130] It should be noted that the main body plate 116 of the housing 11 forming the air outlet 112 can correspondingly be formed as a part of the box body 20, and the first port 21 can be formed as the air outlet 112 at the same time.

[0131] For other components and operations of the heat dissipation device 10 and the power conversion device 100 according to the embodiments of the present invention, those skilled in the art are known and will not be described in detail here.

[0132] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0133] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A heat dissipation device, characterized in that, Including: A housing (11), the housing (11) having an air inlet (111) and an air outlet (112); A radiator (12) and a fan (13), the fan (13) and the radiator (12) being disposed between the air inlet (111) and the air outlet (112) of the housing (11); wherein The housing (11) includes a first chamber (a), a second chamber (b), and a third chamber (c) connected in series in sequence; the radiator (12) is accommodated in the second chamber (b), the fan (13) is disposed in at least one of the first chamber (a), the second chamber (b), and the third chamber (c), and there is an angle (h) less than or equal to 45 degrees between the axis of the fan (13) and the first direction.

2. The heat dissipation device according to claim 1, wherein, The fan (13) is disposed between the air inlet (111) and the radiator (12), and the fan (13) is located in the first chamber (a) and is sequentially disposed with the radiator (12) in the first direction; or the fan (13) is disposed between the air outlet (112) and the radiator (12), and the fan (13) is located in the third chamber (c) and is sequentially disposed with the radiator (12) in the first direction; or the fan (13) is disposed between two adjacent radiators (12), and the two adjacent radiators (12) are sequentially disposed in the first direction, and the fan (13) is located in the second chamber (b).

3. The heat dissipation device according to claim 1, wherein, One end of the radiator (12) extends into the first chamber (a) or into the third chamber (c).

4. The heat dissipation device according to claim 2 or 3, characterized in that, The distance L from the first plane (i) where the air inlet side of the fan (13) is located to the surface or end face of the object closest to the first plane (i) is L≥0.5D, and / or the distance L from the second plane (j) where the air outlet side of the fan is located to the surface of the object closest to the second plane (j) is L≥0.5D, where D is the outer diameter of the fan frame of the fan (13).

5. The heat dissipation device according to claim 1, wherein The radiator (12) has a plurality of heat dissipation channels extending along the first direction, and at least one of the heat dissipation channels has a different length from other heat dissipation channels.

6. The heat dissipation device according to claim 5, wherein, The lengths of two or more adjacent heat dissipation channels in the radiator (12) increase or decrease in sequence.

7. The heat dissipation device according to claim 5, wherein The length Lh of the heat dissipation channel should satisfy l_h = c*(2i - 1) / (2*f^i); where c is the speed of sound, the passing frequency f^i of the fan = i*(N*z) / 60, N is the rotational speed, Z is the number of blades, i is the order, and i is a positive integer.

8. The heat dissipation device according to claim 1, wherein, Further including: A guiding plate (14), the guiding plate (14) being disposed in the first chamber (a) and / or the second chamber (b), and the guiding plate (14) being configured as an arc-shaped plate, a curved surface plate, or a bent plate.

9. The heat dissipation device according to claim 8, characterized in that, 10. The heat dissipation device according to claim 9, wherein, There is a gap between the guiding plate (14) and the housing (11) to form a sound absorption cavity (d), and at least one sound absorption hole (141) is provided on the guiding plate (14) to communicate the sound absorption cavity (d) with the first chamber (a) or with the second chamber (b). Further including: A sound-absorbing member (15), the sound-absorbing member (15) is disposed in the sound-absorbing cavity (d) and is connected to the housing (11).

11. A power conversion device, characterized in that, Comprising: The heat dissipation device according to any one of claims 1-10; A box body (20) and a power conversion module (30), the power conversion module (30) is disposed in the box body (20); The box body (20) is connected to the housing (11) of the heat dissipation device, and a radiator (12) is used to conduct the heat in the box body (20) into the heat dissipation device.

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