CN220629890U - Heat radiating unit and electric module - Google Patents

Abstract

The utility model discloses a heat dissipation unit and an electric module. The heat dissipation unit comprises a radiator and a heat pipe; on the radiator, the body extends along the air supply direction, and the side surface of the radiator is provided with a mounting area for mounting the first power device; the installation area extends along the air supply direction; the body is provided with a heat conducting groove corresponding to the installation area; the heat conduction groove comprises a first groove section and a second groove section which are communicated with each other; the first groove section is arranged in the installation area and extends along the air supply direction; the second groove section is arranged on the end face of the body and extends along the vertical direction; the two fin groups are respectively fixed on the two side surfaces of the body and are positioned on the first groove section; the heat pipe is fixed in the heat conducting groove in a matching way so as to conduct heat generated by the first power device along the heat conducting groove to one side facing the air supply direction. The electric module adopts the heat dissipation unit. According to the technical scheme, the first heat pipe and the second heat pipe can conduct heat along the air supply direction, the vertical direction and the horizontal direction perpendicular to the air supply direction, so that the temperature of the radiator is more balanced, and the radiating efficiency is improved.

Description

Heat radiating unit and electric module

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a heat dissipation unit and an electric module.

Background

At present, the power of the power electronic module is continuously increased, the space is smaller and smaller, the power density is larger and larger, and the heat dissipation problem is also more and more prominent. The heat dissipation technology becomes a main factor for restricting the increase of the power of the module, improves the temperature uniformity of each power device and the efficiency of heat dissipation equipment, and can reduce the limit of the heat dissipation factor on the increase of the power density and prolong the service life of the equipment with low cost.

In the existing heat dissipation design, a plurality of power devices with different functions are often integrated on a radiator module, and under different working states, the running states and the losses of the different power devices are different, so that the situations that the heat quantity of certain parts on the radiator is larger and the heat quantity of certain parts is lower can occur, the heat quantity of the radiator is unbalanced, and the overall heat dissipation efficiency is lower; in addition, in order to meet the heat dissipation requirements of each power device in all working states (especially in severe working conditions), the volume of the heat sink is often designed to be large, which not only consumes large cost, but also is often difficult to meet the space requirement in actual installation.

Disclosure of Invention

The utility model aims to overcome the defects or problems in the background art and provide a heat dissipation unit and an electric module with high heat dissipation efficiency, balanced temperature, small volume and low cost.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a heat dissipation unit, which is marked as a first technical scheme, wherein the first technical scheme is used for receiving external air supply and dissipating heat of a first power device; comprising the following steps: a heat sink comprising a body and two fin sets; the body extends along the air supply direction, and the side surface of the body is provided with a mounting area for mounting the first power device; the installation area extends along the air supply direction; the body is provided with a heat conduction groove corresponding to the installation area; the heat conduction groove comprises a first groove section and a second groove section which are communicated with each other; the first groove section is arranged in the installation area and extends along the air supply direction; the second groove section is arranged on the end face of the body and extends in the vertical direction; the two fin groups are respectively fixed on the two side surfaces of the body and are positioned on the first groove section; and the heat pipe is fixedly arranged in the heat conducting groove in a matching way so as to conduct heat generated by the first power device along the heat conducting groove to one side facing to the air supply direction.

Based on the first technical scheme, the device further comprises a second technical scheme, wherein in the second technical scheme, the mounting areas are arranged on the two side surfaces of the body; the two installation areas are respectively corresponding to the heat conducting grooves; the two second groove sections are respectively arranged on the two end faces of the body; the heat pipes are fixed in the two heat conduction grooves in a matched mode.

Based on the second technical scheme, the air supply device further comprises a third technical scheme, wherein in the third technical scheme, along the air supply direction, the two first groove sections are configured to extend to the two ends of the body respectively.

Based on the third technical scheme, the novel water heater further comprises a fourth technical scheme, wherein in the fourth technical scheme, two first groove sections are staggered along the vertical direction.

Based on the fourth technical scheme, the heat pipe further comprises a fifth technical scheme, and in the fifth technical scheme, the shape and the size of the two heat pipes are consistent.

Based on the fifth technical scheme, the novel heat exchanger further comprises a sixth technical scheme, wherein in the sixth technical scheme, the top ends of the two fin groups are flush with the top surface of the body; the top end of the second groove section of the heat conduction groove, which is arranged relatively higher, is flush with the top surface of the body and faces the air supply direction.

Based on the first technical scheme, the heat pipe further comprises a seventh technical scheme, and in the seventh technical scheme, the heat pipe is fixed to the heat conducting groove in an adhesive or welding mode.

Based on the first technical scheme, the solar heat collector further comprises a eighth technical scheme, wherein the eighth technical scheme further comprises an insulated heat conducting piece; the heat conducting piece corresponds to the first power device and is arranged between the side surface of the body and the first power device in a contact manner; the part of the heat pipe positioned in the corresponding first groove section is contacted with the heat conducting piece.

The utility model also provides an electric module, which is marked as a technical scheme nine, wherein the technical scheme nine comprises the radiating unit, a plurality of first power devices, a circuit board and an air supply element; the body is fixed on the surface of the circuit board; the installation area is provided with a plurality of first power devices which are distributed at intervals along the air supply direction; each first power device is electrically connected with the circuit board; the air supply component is arranged at one end of the body.

Based on the technical scheme nine, the circuit board further comprises a technical scheme ten, wherein in the technical scheme ten, the circuit board is provided with a plurality of heat dissipation units along the horizontal direction perpendicular to the air supply direction; the number of the air supply elements is at least two, the air supply elements are distributed along the horizontal direction vertical to the air supply direction, and the air supply range covers the heat dissipation units.

From the above description of the present utility model, compared with the prior art, the present utility model has the following advantages:

1. in the first technical scheme, the radiator is provided with the heat conduction groove, the heat conduction groove comprises a first groove section extending along the air supply direction and a second groove section extending along the vertical direction, the first groove section is arranged in the installation area, the second groove section is arranged on two end faces of the body, the heat pipe is fixedly arranged in the heat conduction groove in a matching mode, and heat generated by a first power device arranged in the installation area can be conducted. In the heat transfer process, the part of the heat pipe positioned in the first groove section firstly receives heat and conducts the heat to the side surface of the body, and at the moment, the part of the heat pipe positioned in the first groove section extends along the air supply direction, so that the heat pipe can conduct heat along the air supply direction after receiving the heat and realize the temperature uniformity of the radiator along the air supply direction; when heat on the heat pipe is conducted to the part of the heat pipe located in the second groove section, the part of the heat pipe located in the second groove section is located on the end face of the body and extends along the vertical direction, so that the received heat can be expanded to the end face of the body along the direction perpendicular to the air supply direction, and meanwhile, the heat can be expanded to the top of the base along the vertical direction and conducted to the two fin groups, namely, in the technical scheme, the heat pipe can conduct heat along the air supply direction, the vertical direction and the thickness direction of the body, the uniformity of the radiator can be effectively improved, and the heat dissipation efficiency is improved. The heat pipe is arranged, so that the radiator does not need to realize rapid heat dissipation through increasing the volume, and therefore, the heat pipe can reduce the cost and is convenient to install.

2. In the second technical scheme, the two side surfaces of the body are provided with mounting areas, so that the power density is high and the structure utilization rate is high. The two mounting areas are respectively provided with a heat conducting groove; the two second groove sections are respectively arranged on the two end faces of the body; the two heat conduction grooves are fixedly provided with the heat pipes in a matching manner, the two heat pipes conduct heat independently, the independence is good, and the heat conduction effect and the heat dissipation effect are better.

3. In the third technical scheme, the first groove section is configured to extend to the two ends of the body respectively, and the extension rules of the two first groove sections are consistent, namely, the two ends of the two heat pipes can extend to the two ends of the body respectively, the area of which can conduct heat is larger, so that the temperature uniformity of the radiator along the air supply direction is better, and the heat radiation efficiency is more beneficial to improvement.

4. In the fourth technical scheme, the two first groove sections are staggered along the vertical direction, so that heat conducted by the parts of the two heat pipes in the corresponding first groove sections can be prevented from being concentrated at the same height position of the body, and the heat dissipation efficiency of the radiator is further improved.

5. In the fifth technical scheme, the shapes and the sizes of the two heat pipes are consistent, the universality is better, the mass production is convenient to realize, the production cost can be reduced, and in addition, the consistency of the shapes and the sizes of the two heat conduction grooves is ensured, so that the production difficulty of the radiator is lower.

6. In the sixth technical scheme, the top end of the second groove section of the first groove section of the relatively higher heat conduction groove is flush with the top surface of the body and faces the air supply direction, so that the heat pipe positioned in the heat conduction groove can conduct heat to the topmost end, fin groups on two sides can be better utilized for heat dissipation, and the heat dissipation efficiency is further improved.

7. In the seventh technical scheme, the heat pipe is fixed in the heat conducting groove in an adhesive or welding mode, the installation mode is simple, and the cost is low.

8. In the eighth technical scheme, the two side surfaces of the body are both provided with insulating heat conducting pieces, and the insulating heat conducting pieces are used for avoiding the first power device from being in direct contact with the radiator so as to prevent the first power device from conducting electricity between the heat pipe and the body and ensure the safety performance of the heat radiating unit and the normal work of the first power device.

9. In the ninth technical scheme, the electric module adopts the heat dissipation units in the first to eighth technical schemes, inherits the advantages of the heat dissipation units, and has the characteristics of small volume, low cost, small thermal resistance between the first power device and the heat radiator, good heat dissipation efficiency and the like. In addition, as a plurality of first power devices distributed along the air supply direction are installed in each installation area, the bearing rate of the electric module is high, the power density is high, and the material cost is reduced.

10. In the tenth technical scheme, the circuit board is provided with a plurality of radiating units side by side, and each radiating unit is independent and not crossed each other to all be located the air-out side of air supply component, the wind that is carried by air supply component can pass through each radiating unit smoothly, and can not take place the series flow, the radiating effect is good.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a heat dissipating unit and a first power device;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a front view of FIG. 1;

FIG. 5 is a rear view of FIG. 1;

FIG. 6 is a schematic diagram of a heat sink;

FIG. 7 is a left side view of FIG. 6;

FIG. 8 is a right side view of FIG. 6;

FIG. 9 is a front view of FIG. 6;

FIG. 10 is a rear view of FIG. 6;

FIG. 11 is a schematic structural diagram of a first heat pipe and a second heat pipe;

FIG. 12 is a schematic diagram of an electrical module;

FIG. 13 is a second schematic diagram of an electrical module;

fig. 14 is a top view of an electrical module.

The main reference numerals illustrate:

a heat radiating unit 100; a first power device 200; a circuit board 300; a blowing element 400; a second power device 500;

a radiator 1; a body 11; a heat conduction groove 111; a first slot section 1111; a second groove section 1112; a fin group 12; a heat radiation fin 121; a first heat pipe 2; a second heat pipe 3; a heat conductive member 4.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Referring to fig. 1 to 14, fig. 1 to 14 show an electrical module of the present embodiment. As shown in fig. 1 to 14, the electrical module provided in the present embodiment includes a heat dissipation unit 100, a plurality of first power devices 200, a circuit board 300, an air blowing element 400, and a second power device 500.

The heat dissipation unit 100 is configured to receive external air (i.e. air supplied by the air supplying element 400 in the present embodiment) and dissipate heat of the first power device 200.

As shown in fig. 1 to 5, the heat dissipating unit 100 includes a heat sink 1, two heat pipes, and a heat conductive member 4.

The heat sink 1 is structured as shown in fig. 6 to 10, and includes a body 11 and two fin groups 12. The body 11 has a structure of, but not limited to, a cubic plate-shaped structure vertically fixed to the surface of the circuit board 300 and extending in the air supply direction of the air supply member 400, and a side surface thereof is provided with a mounting area for mounting the first power device 200, the mounting area extending in the air supply direction; specifically, in this embodiment, the two sides of the body 11 are respectively provided with a mounting area, the mounting areas on the two sides are respectively located at the bottoms of the two sides and are respectively used for mounting the first power device 200, in addition, the body 11 is provided with heat conducting grooves 111 corresponding to the mounting areas, specifically, the number of the heat conducting grooves 111 is two, and the two heat conducting grooves 111 are respectively in one-to-one correspondence with the two mounting areas; the two heat conduction grooves 111 are respectively used for installing two heat pipes so as to realize heat conduction and balance the temperature of the radiator 1, the two heat conduction grooves 111 comprise a first groove section 1111 and a second groove section 1112 which are communicated with each other, wherein the two first groove sections 1111 are respectively arranged in two installation areas and extend along the air supply direction, the second groove section 1112 is arranged on the end face of the body 11 and extends along the vertical direction, and the two second groove sections 1112 are respectively arranged on the two end faces of the body 11.

In this embodiment, the shape and size of the two heat conduction grooves 111 on the body 11 may be identical or not identical. Preferably, in order to facilitate the structure forming and save the manufacturing cost, in this embodiment, the shapes and the sizes of the two heat conduction grooves 111 are completely consistent, the first groove sections 1111 of the two heat conduction grooves 111 extend horizontally along the air supply direction, and the two first groove sections 1111 are configured such that two ends extend to two ends of the body 11 respectively. Preferably, in the present embodiment, the two first groove sections 1111 are staggered in the vertical direction, which can prevent the heat conducted by the portions of the two heat pipes located in the corresponding first groove sections 1111 from being concentrated at the same height of the body 11, thereby helping the radiator 1 to dissipate heat and conduct heat more quickly. More preferably, the top ends of the second groove sections 1112 on the higher heat conducting groove 111 arranged in the first groove section 1111 extend to be flush with the top surface of the body 11, and the second groove sections 1112 face to the air supply direction, so that the heat pipe in the heat conducting groove 111 can conduct heat to the top end, and can better utilize the fin groups 12 on two sides to dissipate heat, thereby further improving the heat dissipation efficiency.

The two fin groups 12 are respectively fixed on two sides of the body 11 and located above the first groove section 111, specifically, in this embodiment, the two fin groups 12 are both fixed on the top of the body 11, and the two fin groups 12 are symmetrically arranged on two sides of the body 11, which has a larger heat dissipation area and can be used for realizing rapid heat dissipation. As shown in fig. 6 to 10, in the present embodiment, two fin groups 12 are integrally formed with the body 11, each fin group 12 includes a plurality of heat dissipation fins 121 arranged at intervals along the vertical direction, each heat dissipation fin 121 is horizontally arranged and has a square plate structure, and the space between each heat dissipation fin 121 forms an air channel suitable for air supply to pass through. The length of the heat radiation fins 121 along the air supply direction is equal to the length of the body 11, and two ends of the heat radiation fins are respectively flush with two ends of the body 11, and the heat radiation fins 121 positioned at the uppermost part of the two fin groups 12 are flush with the top surface of the body 11.

Specifically, as shown in fig. 1 to 5 and 11, the number of the heat pipes is two corresponding to the number of the heat conducting grooves 111, and the two heat pipes are respectively and matchedly fixed in the two heat conducting grooves 111, which can be glued in the corresponding heat conducting grooves 111 by means of an adhesive or welded in the heat conducting grooves 111, and the installation mode is simple and the cost is lower. In order to facilitate distinction, in this embodiment, two heat pipes are respectively defined as a first heat pipe 2 and a second heat pipe 3, where the first heat pipe 2 is fixed at the top end of the second groove section 1112 and extends into the heat conducting groove 111 flush with the top surface of the body 11, the second heat pipe 3 is fixed in another heat conducting groove, the first heat pipe 2 and the second heat pipe 3 are both used for conducting heat, and their shapes and dimensions are respectively matched with those of the corresponding heat conducting groove 111, and based on the structural features that the shapes and dimensions of the two heat conducting grooves 111 are consistent, the shapes and dimensions of the first heat pipe 2 and the second heat pipe 3 provided in this embodiment are also consistent, so that the universality of the two heat pipes is good, and therefore, the use requirement can be met by mass-producing heat pipes of the same specification, which is beneficial to reducing the production cost. The first heat pipe 2 and the second heat pipe 3 are conventional technology in the heat transfer technical field, and are mainly composed of a pipe shell, a liquid suction core and an end cover, wherein the inside of the first heat pipe 2 and the second heat pipe 3 is pumped into a negative pressure state, proper liquid is filled, the boiling point of the liquid is low, the liquid is easy to volatilize, the pipe wall is provided with the liquid suction core, the first heat pipe 2 and the second heat pipe 3 are formed by capillary porous materials, one ends of the first heat pipe 2 and the second heat pipe 3 are evaporation ends, the other ends of the first heat pipe and the second heat pipe are condensation ends, when one ends of the first heat pipe and the second heat pipe are heated, the liquid in the capillary is rapidly vaporized, the vapor flows to the other ends under the power of thermal diffusion, and is condensed at the cold ends to release heat, and the liquid flows back to the evaporation ends along the porous materials by capillary action, so circulation is not only until the temperatures at the two ends are equal.

In this embodiment, since both ends of the two first groove sections 1111 extend to both ends of the body 11 respectively, both ends of the first heat pipe 2 and the second heat pipe 3 also extend to both ends of the body 11 respectively, which can conduct heat with larger area, and can make the heat sink 1 have better temperature uniformity along the air supply direction, which is more beneficial to improving the heat dissipation efficiency.

In this embodiment, the heat conducting grooves 111 are formed on two sides of the heat radiator 1, the heat conducting grooves 111 include a first groove section 1111 extending along the air supply direction and a second groove section 1112 extending along the vertical direction, the two second groove sections 1112 are respectively disposed on two end faces of the body 11, the first heat pipe 2 and the second heat pipe 3 are respectively matched and fixed in the heat conducting grooves 111, the independence of the first heat pipe 2 and the second heat pipe 3 is good, and the heat conducting grooves can conduct heat generated by the first power devices 200 mounted on two sides of the body 11 separately. In actual use, during heat transfer, the parts of the first heat pipe 2 and the second heat pipe 3 located in the first groove section 1111 firstly receive heat and conduct the heat to the side surface of the main body 11, at this time, since the parts of the first heat pipe 2 and the second heat pipe 3 located in the first groove section 1111 extend along the air supply direction, the received heat can be expanded along the air supply direction to realize the temperature uniformity of the radiator 1 along the air supply direction; when the heat on the first heat pipe 2 and the second heat pipe 3 is conducted to the portions thereof located in the second groove section 1112, since the portions of the first heat pipe 2 and the second heat pipe 3 located in the second groove section 1112 are located at the two end faces of the body 11 and extend in the vertical direction, the heat received by the heat pipes can expand the heat to the end face of the body 11 in the direction perpendicular to the air supply direction, and simultaneously expand the heat to the top of the body 11 in the vertical direction and conduct the heat to the two fin groups 12, that is, in this embodiment, the heat conduction of the first heat pipe 2 and the second heat pipe 3 in the air supply direction, the vertical direction and the thickness direction of the body 11 can be realized, the temperature uniformity of the radiator 1 can be effectively improved, and the heat dissipation efficiency can be improved. The arrangement of the first heat pipe 2 and the second heat pipe 3 makes the radiator 1 not required to achieve rapid heat dissipation by increasing the volume, and therefore, it can reduce the cost and can be easily installed.

The heat conducting member 4 is an insulating heat conductor, and may be, but not limited to, a ceramic sheet, as shown in fig. 1. The heat conducting member 4 corresponds to the first power device 200, that is, each power device corresponds to a heat conducting member 4; the heat conducting member 4 is installed and contacted between the side surface of the body 11 and the first power device 200, the parts of the first heat pipe 2 and the second heat pipe 3 located in the corresponding first groove sections 1111 are contacted with the heat conducting member 4, and the insulating heat conducting member 4 can prevent the first power device 200 from being directly contacted with the radiator 1, so as to prevent electric conduction between the first power device 200 and the radiator 1, and ensure normal operation of the first power device 200 and safety performance of the radiating unit 100. The first heat conducting pipe and the second heat conducting pipe are both in contact with the corresponding heat conducting piece 4, so that heat generated by the first power device 200 can be reliably conducted to the first heat conducting pipe and the second heat conducting pipe through the heat conducting piece 4, and then the heat is conducted and equalized by the first heat conducting pipe and the second heat conducting pipe.

As shown in fig. 1, 12 and 13, the number of the first power devices 200 is multiple, and the two mounting areas of the body 11 are respectively provided with a plurality of first power devices 200 at intervals along the air supply direction, each first power device 200 is electrically connected with the circuit board 300, so that the bearing rate of the body 11 is high, the power density is high, and the material cost is reduced. In this embodiment, the number of the first power devices 200 disposed on two sides of the body 11 is the same, and each first power device 200 corresponds to a corresponding heat conducting member 4 and is in contact with the heat conducting member 4. When the heat radiator works, the first power devices 200 on the body 11 can work simultaneously or not, the heat radiator can enter or not enter a working state according to specific working conditions, under the condition that each first power device 200 does not enter the working state simultaneously, heat generated by the working first power device 200 can be conducted to the side face of the body 11 and the first heat pipe 2 or the second heat pipe 3 through the heat conducting piece 4, and heat conduction along the air supply direction, the vertical direction and the direction perpendicular to the air supply direction is conducted by the first heat pipe 2 or the second heat pipe 3, so that the heat on the heat radiator 1 can not be concentrated and balanced, and a better heat radiating effect is achieved.

The circuit board 300 is shown in fig. 12 to 14, and may be, but not limited to, a rectifying circuit board 300 or an inverter circuit board 300.

As shown in fig. 12 to 14, the air-blowing element 400 is a fan, which is located outside the circuit board 300 and is disposed at one end of the body 11, and is disposed towards one end of the body 11, where the top end of the second slot 1112 is flush with the top surface of the body 11, for blowing air toward the heat-dissipating unit 100.

Preferably, in order to increase the power density and reduce the cost, in the present embodiment, the circuit board 300 is provided with a plurality of heat dissipating units 100 along a horizontal direction perpendicular to the air supply direction. The number of the air-blowing elements 400 is at least two, and in this embodiment, three air-blowing elements 400 are arranged along a horizontal direction perpendicular to the air-blowing direction, and the air-blowing range covers each heat dissipating unit 100.

As shown in fig. 12 to 14, the number of the second power devices 500 is set to be plural according to actual requirements, each second power device 500 is electrically connected to the circuit board 300, the circuit board 300 is arranged with a plurality of columns of second power devices 500 at intervals along a horizontal direction perpendicular to the air supply direction of the air supply element 400, each column of second power devices 500 is disposed at a side of the heat dissipation unit 100, each column of second power devices 500 has a plurality of second power devices 500 arranged along the air supply direction of the air supply element 400, and each second power device 500 has a safety distance from the adjacent heat dissipation fins 121.

The electrical module provided in this embodiment adopts the heat dissipation unit 100, which has the same characteristics as the heat dissipation unit 100, and has the characteristics of small volume, low cost, small thermal resistance between the first power device 200 and the heat sink 1, good temperature uniformity of the heat sink 1, high heat dissipation efficiency, and the like. Since the circuit board 300 is provided with the plurality of heat dissipation units 100 arranged side by side, the heat dissipation units 100 are independent from each other and are not crossed, and are all positioned on the air outlet side of the air supply element 400, the air conveyed by the air supply element 400 can smoothly pass through the heat dissipation units 100, and no series flow occurs, so that the heat dissipation effect is good.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. A heat dissipation unit for receiving external air supply and dissipating heat of the first power device; the method is characterized by comprising the following steps:

a heat sink comprising a body and two fin sets; the body extends along the air supply direction, and the side surface of the body is provided with a mounting area for mounting the first power device; the installation area extends along the air supply direction; the body is provided with a heat conduction groove corresponding to the installation area; the heat conduction groove comprises a first groove section and a second groove section which are communicated with each other; the first groove section is arranged in the installation area and extends along the air supply direction; the second groove section is arranged on the end face of the body and extends in the vertical direction; the two fin groups are respectively fixed on two side surfaces of the body;

and the heat pipe is fixedly arranged in the heat conducting groove in a matching way so as to conduct heat generated by the first power device along the heat conducting groove to one side facing to the air supply direction.

2. A heat dissipating unit as set forth in claim 1, wherein said mounting areas are provided on both sides of said body;

the two installation areas are respectively corresponding to the heat conducting grooves; the two second groove sections are respectively arranged on the two end faces of the body;

the heat pipes are fixed in the two heat conduction grooves in a matched mode.

3. A heat dissipating unit according to claim 2, wherein both of said first groove sections are configured such that both ends extend to both ends of said body, respectively, in the air blowing direction.

4. A heat dissipating unit according to claim 3, wherein two of said first groove segments are arranged in a staggered manner in the vertical direction.

5. A heat dissipating unit as set forth in claim 4 wherein both of said heat pipes are uniform in shape and size.

6. The heat dissipating unit of claim 5, wherein the top ends of both of said fin sets are flush with the top surface of said body; the top end of the second groove section of the heat conduction groove, which is arranged relatively higher, is flush with the top surface of the body and faces the air supply direction.

7. A heat dissipating unit according to claim 1, wherein said heat pipe is fixed to said heat conducting groove by means of gluing or welding.

8. A heat dissipating unit as defined in claim 1, further comprising an insulating heat conducting member; the heat conducting piece corresponds to the first power device and is arranged between the side surface of the body and the first power device in a contact manner; the part of the heat pipe positioned in the corresponding first groove section is contacted with the heat conducting piece.

9. An electrical module comprising a heat dissipating unit according to any one of claims 1 to 8, a number of said first power devices, a circuit board and an air supply element;

the body is fixed on the surface of the circuit board; the installation area is provided with a plurality of first power devices which are distributed at intervals along the air supply direction; each first power device is electrically connected with the circuit board; the air supply component is arranged at one end of the body.

10. An electrical module as claimed in claim 9, wherein said circuit board is provided with a plurality of said heat dissipating units in a horizontal direction perpendicular to the air blowing direction; the number of the air supply elements is at least two, the air supply elements are distributed along the horizontal direction vertical to the air supply direction, and the air supply range covers the heat dissipation units.