Heat dissipation device

Abstract

The utility model discloses a heat dissipation device, and the device comprises a radiator which comprises a plurality of cooling fins which are arranged at intervals, and a gap between every two adjacent cooling fins forms an air inlet channel; and the air outlet component is arranged above the cooling fins and is provided with an air outlet channel communicated with the opening in the upper side of the air inlet channel, so that air which enters the air inlet channel and exchanges heat with the cooling fins can flow out upwards from the air outlet channel. According to the heat dissipation device, the radiator and the air outlet component are combined, the chimney effect for strengthening natural convection is formed, high-temperature air in the radiator can only move upwards through the fixed air outlet channel, supplementary airflow can only be supplemented to the middle through the two sides of the radiator, and therefore the pressure difference between a high-pressure area and a low-pressure area is guaranteed; the heat dissipation device is high in air entrainment capacity, the air flow speed is higher, and heat dissipation can be efficiently and rapidly carried out on the component to be subjected to heat dissipation.

Description

Technical Field

[0001] The present application relates to the field of heat dissipation technology, and more specifically to a heat dissipation device. Background Art

[0002] Please see attached Figure 1 , attached Figure 1 This is an air flow diagram of a traditional heat sink in the prior art. The heat sink only includes a radiator. The high-temperature air formed after the low-temperature air in the middle of the radiator exchanges heat with the heat sink will move upward, thereby forming a low-pressure area in the middle of the radiator, thereby sucking the low-temperature air outside the radiator into the low-pressure area to form convective heat exchange. However, since the traditional radiator lacks constraints on the flow of air, the relatively low-temperature air in the upper space in the middle of the radiator will also flow downward to the middle of the radiator. Therefore, the pressure difference between the low-pressure area and the high-temperature area is small, which leads to a weaker ability of the heat sink to suck air and slower air flow. Utility Model Content

[0003] In view of this, the present application provides a heat dissipation device, which solves the problem of limited heat exchange capacity.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A heat dissipation device, comprising:

[0006] The radiator comprises a plurality of radiating fins arranged at intervals, wherein the gaps between adjacent radiating fins form an air inlet channel;

[0007] The air outlet component is arranged above the heat sink and has an air outlet channel connected to the upper opening of the air inlet channel, so that the air entering the air inlet channel and exchanging heat with the heat sink can flow upward from the air outlet channel.

[0008] Optionally, in the above-mentioned heat dissipation device, the air outlet component includes an air outlet cavity forming the air outlet channel, and a wind shield plate arranged at the bottom of the air outlet cavity, and the wind shield plate covers the upper opening.

[0009] Optionally, in the above heat dissipation device, along the extension direction of the heat sink, the heat sink includes a middle area and two edge areas located on both sides of the middle area;

[0010] The bottom of the air outlet component is arranged in the middle area.

[0011] Optionally, in the above heat dissipation device, a mounting groove is provided above the heat sink, and an end portion of the air outlet component is arranged in the mounting groove.

[0012] Optionally, in the above heat dissipation device, the mounting groove is adapted to a wind shield.

[0013] Optionally, in the above heat dissipation device,

[0014] The air outlet component is naturally placed above the heat sink;

[0015] or,

[0016] The air outlet component is welded above the heat sink.

[0017] Optionally, in the above heat dissipation device, along the spacing direction of the plurality of heat sinks, the air outlet component is connected to all the upper openings.

[0018] Optionally, in the above heat dissipation device, the length of the air outlet channel along the vertical direction is greater than 10 mm.

[0019] Optionally, in the above heat dissipation device, the air outlet component is made of metal.

[0020] Optionally, in the above heat dissipation device,

[0021] The heat sink is any one of a straight fin, a V-shaped fin, a Y-shaped fin, and a special-shaped fin;

[0022] and / or,

[0023] The cross section of the air outlet channel is a constant cross section or a variable cross section.

[0024] In the heat dissipation device provided by the present application, there is no need to increase the height size of the heat sink or change the fin structure to enhance heat exchange, and its structure is simple and the processing difficulty is low; the heat dissipation device of the present application is provided with an air outlet component above the multiple heat sinks arranged in parallel of the radiator, and the heat sink and the air outlet component are combined to form a chimney effect that enhances natural convection; specifically: the heat flow of the heat dissipation component to be cooled is conducted to the heat sink of the radiator, and the low-temperature air entering the air inlet channel exchanges heat with the heat sink. After the heat exchange, the high-temperature air will flow upward through the air outlet channel of the air outlet component, and a low-pressure area will be formed inside the radiator; the outside of the radiator is low-temperature air, and a high-pressure area with a large pressure difference with the low-pressure area is relatively formed. Therefore, the external low-temperature air will be quickly replenished to the inside of the radiator through the air inlet channel, and the low-temperature air will be sucked into the air outlet channel at a high speed after heat exchange with the heat sink, and discharged to the outside; as above, under the premise of not improving the structure of the heat sink, the heat dissipation device has a strong ability to suck air and a faster air flow rate, and can efficiently and quickly dissipate heat for the components. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 1 It is an air flow diagram of a heat sink in the prior art;

[0027] Figure 2 This is a schematic diagram of the structure of the heat dissipation device of the present application;

[0028] Figure 3 An exploded view of the heat dissipation device of the present application;

[0029] Figure 4 This is an air flow diagram of the heat dissipation device of the present application.

[0030] Figure 1-Figure 4 middle:

[0031] 1. Radiator; 2. Air outlet components;

[0032] 11. Heat sink;

[0033] 21. Air outlet cavity; 22. Wind shield;

[0034] 111. Installation groove; 112. Upper opening; 113. Edge opening. DETAILED DESCRIPTION

[0035] The present application provides a heat dissipation device.

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] like Figure 2-4 As shown, a heat dissipation device includes a heat sink 1 and an air outlet component 2. The heat sink 1 includes a plurality of heat sinks 11 arranged at intervals, and the gaps between adjacent heat sinks 11 form an air inlet channel. The air outlet component 2 is arranged above the heat sink 11, and the air outlet component 2 has an air outlet channel connected to an upper opening 112 of the air inlet channel, so that the air entering the air inlet channel and exchanging heat with the heat sink 11 can flow upward from the air outlet channel.

[0038] Please see attached Figure 2It should be noted that the space between two adjacent heat sinks 11 forms an air inlet channel, and the air inlet channel includes an upper opening 112 located above the air inlet channel and two edge openings 113 located on both side edges of the air inlet channel. Along the spacing direction of the plurality of heat sinks 11, a plurality of upper openings 112 are formed at intervals, and a plurality of edge openings 113 are formed at intervals.

[0039] Furthermore, the spacing direction of the plurality of heat sinks 11 is Figure 2 The extending direction of the heat sink 11 is the direction indicated by the arrow. Figure 2 Direction indicated by the arrow.

[0040] The air outlet channel is a vertical air outlet channel. As long as the air outlet channel is arranged above the heat sink 11 and ensures that the bottom opening of the air outlet channel is connected with at least part of the upper opening 112 along the extension direction of the heat sink 11, a chimney effect can be formed; for example:

[0041] Along the extension direction of the heat sink 11, the bottom opening of the air outlet channel is connected to the middle position of the upper opening 112; at this time, the wind enters the air inlet channel from the two edge openings 113 of the air inlet channel and the two sides of the upper opening 112, achieving the effect of supplementing the heat dissipation airflow from both sides of the radiator 1;

[0042] Alternatively, along the extension direction of the heat sink 11, the bottom opening of the air outlet channel is connected to the entire area of ​​the upper opening 112; in this case, the wind enters the air inlet channel only from the two edge side openings 113 of the air inlet channel, and the effect of supplementing the heat dissipation airflow from both sides of the radiator 1 is also achieved;

[0043] Of course, along the extension direction of the heat sink 11 , the bottom opening of the air outlet channel may also be connected to other areas of the upper opening 112 , which will not be described in detail here.

[0044] The heat sink 1 includes a heat conducting part; a plurality of heat sinks 11 are arranged at intervals on the heat conducting part and are heat-conductingly connected to the heat conducting part. The components to be cooled are heat-conductingly connected to the heat conducting part, and a heat flow is formed from the components to be cooled to the heat conducting part, so that the heat of the components to be cooled is transferred to the heat conducting part, and the heat of the heat conducting part is transferred to the heat sink 11, and the heat sink 11 exchanges heat with the low-temperature air in the air inlet channel, and then the heat on the heat sink 11 is diffused to the outside atmosphere, and finally the components to be cooled are cooled.

[0045] Please see attached Figure 2 , attached Figure 2The heat dissipation device in the present application is provided with an air outlet component 2 above a plurality of heat dissipation fins 11 of the heat dissipation device 1. The heat dissipation device 1 and the air outlet component 2 are combined to form a chimney effect that strengthens natural convection. The heat dissipation device does not need to increase the height of the heat dissipation fins or change the fin structure to enhance heat exchange. It has a simple structure and low processing difficulty. Moreover, since the heat dissipation device is provided with the air outlet component 2, the high-temperature air inside the radiator 1 can only move upward through a fixed air outlet channel, and the supplementary air flow can only be supplemented through both sides of the radiator 1, thereby ensuring the pressure difference between the high-pressure area and the low-pressure area.

[0046] The heat flow of the components to be dissipated is conducted to the heat sink 11 of the radiator 1, and the low-temperature air entering the air inlet channel exchanges heat with the heat sink 11. The high-temperature air after the heat exchange will flow upward through the air outlet channel of the air outlet component 2, and a high-temperature low-pressure area is formed inside the radiator 1; the outside of the radiator 1 is low-temperature air, and a high-pressure area with a relatively large pressure difference with the low-pressure area is formed. Therefore, the external low-temperature air will be quickly replenished to the inside of the radiator 1 through the air inlet channel, and the low-temperature air will be sucked into the air outlet channel at high speed after heat exchange with the heat sink 11, and discharged to the outside; as above, under the premise of not improving the structure of the heat sink, the heat dissipation device has a stronger ability to suck air and a faster air flow rate, and can efficiently and quickly dissipate heat for the components.

[0047] In some embodiments of the present application, the air outlet component 2 includes an air outlet cavity 21 and an air shield 22. The air outlet cavity 21 forms an air outlet channel. The air shield 22 is arranged at the bottom of the air outlet cavity 21, and the air shield 22 covers the upper opening 112.

[0048] It should be noted that, vertically, the heat sink 1 includes a high-temperature diffusion area opposite to the position of the components to be cooled; the bottom of the air outlet component 2 is arranged in the high-temperature diffusion area.

[0049] It should be further explained that, along the extension direction of the heat sink 11 , a wind shield 22 is provided on at least one side of the bottom of the air outlet cavity 21 .

[0050] Furthermore, when the bottom opening of the air outlet cavity 21 is compatible with the outer peripheral contour of the high-temperature diffusion area, the wind shield 22 is set inside the air outlet cavity 21; when the bottom opening of the air outlet cavity 21 is smaller than the outer peripheral contour of the high-temperature diffusion area, the wind shield 22 is set outside the air outlet cavity 21.

[0051] Preferably, along the extension direction of the heat sink 11, two wind shields 22 are respectively arranged outward on the opposite sides of the bottom of the air outlet cavity 21; at this time, the upper opening 112 in the middle position of the high-temperature diffusion area is connected to the air outlet cavity 21, and the upper openings 112 on the two edge sides of the high-temperature diffusion area are blocked by the wind shields 22.

[0052] As mentioned above, by setting the wind shield 22, the high-temperature air is prevented from diffusing upward through the two edge sides of the high-temperature diffusion area, thereby ensuring that the high-temperature air is concentrated in the middle position of the high-temperature diffusion area. The temperature of the air outlet channel connected to the middle position of the high-temperature diffusion area is more concentrated, thereby increasing the pressure difference between the high-temperature air low-pressure area opposite to the air outlet channel and the low-temperature air high-pressure area outside the radiator 1, thereby ensuring the suction force of the air outlet channel and further strengthening the natural convection.

[0053] Furthermore, the wind shield 22 increases the contact area between the bottom of the air outlet component 2 and the top of the radiator 1, thereby ensuring that the air outlet component 2 is securely fixed above the radiator 1 and avoiding the tipping problem caused by the excessive height of the air outlet cavity 21.

[0054] In some embodiments of the present application, the heat sink 1 includes a middle area and two edge areas located on both sides of the middle area along the extension direction of the heat sink 11. The bottom of the air outlet component 2 is arranged in the middle area.

[0055] It should be noted that the middle area is the high-temperature diffusion area mentioned above.

[0056] As mentioned above, the radiator 1 includes an edge area that is not opposite to the position of the components to be cooled. The upper opening 112 located in the edge area also serves as an air inlet for low-temperature air to let air into the air inlet channel. It works together with the edge side opening 113 to increase the air inlet direction of the air inlet channel, thereby achieving the effect of rapid and large-scale replenishment of the heat dissipation airflow through both sides of the radiator 1 to the middle.

[0057] In some embodiments, two wind shields 22 are respectively disposed outwardly on two opposite sides of the bottom of the air outlet cavity 21 , and the sum of the areas of the wind shields 22 is not less than the sum of the areas of the edge areas.

[0058] The above area limitation can, on the one hand, ensure that the radiator 1 has an edge area, ensuring that the heat dissipation air flows through both sides of the radiator 1 to be quickly and massively replenished to the middle; on the other hand, it can ensure that the volume of the radiator 1 is not too large, resulting in waste of materials and processing costs.

[0059] In certain embodiments of the present application, a mounting groove 111 is provided above the heat sink 11 , and an end portion of the air outlet component 2 is disposed in the mounting groove 111 .

[0060] It should be noted that a mounting groove 111 is provided on the top of each heat sink 11 , so that the tops of the multiple heat sinks 11 arranged in parallel are assembled to form a mounting groove 111 with a three-dimensional space, and the bottom end of the air outlet component 2 is arranged in the mounting groove 111 .

[0061] The installation groove 111 is provided to facilitate the assembly of the air outlet component 2 above the radiator 1, and ensure that the air outlet component 2 is constrained and fixed on the heat dissipation part to avoid movement and dislocation, thereby ensuring the stability of the heat dissipation device structure and the stability of the heat dissipation performance.

[0062] In certain embodiments of the present application, the mounting groove 111 is adapted to fit the wind shield 22 .

[0063] The wind shield plate 22 not only covers the upper opening of the air inlet passage, but also ensures smooth assembly in the mounting groove 111 .

[0064] The installation slot 111 is adapted to the wind shield 22, which means that the contour of the bottom of the air outlet cavity 21 and the wind shield 22 disposed outside the bottom of the air outlet cavity 21 are adapted to the contour of the installation slot 111. As described above, it can be ensured that the air outlet component 2 provided with the wind shield 22 can be arranged in the installation slot 111 with a perfect fit, thereby ensuring the reliable assembly of the air outlet component 2 in the installation slot 111.

[0065] In certain embodiments of the present application, the air outlet component 2 is naturally placed above the heat sink 11 .

[0066] It should be noted that natural placement means that the air outlet component 2 is directly placed on the top of the heat sink 11 without any fixing process. Since the air outlet component 2 has a certain weight, under the effect of its own weight, the air outlet component 2 can be directly placed on the top of the plurality of heat sinks 11 arranged at intervals; as above, the fixing process of the air outlet component 2 on the radiator 1 is omitted, which not only simplifies assembly, but also saves processing costs.

[0067] In some embodiments, the air outlet component 2 is welded above the heat sink 11. The air outlet component 2 is fixed above the plurality of heat sinks 11 arranged at intervals by the welding process, and the air outlet component 2 will not move or be misplaced during operation, thereby ensuring the stability of the heat dissipation device structure and the stability of the heat dissipation performance.

[0068] In some embodiments of the present application, along the spacing direction of the plurality of heat sinks 11 , the air outlet component 2 is in communication with all the upper openings 112 .

[0069] As described above, the size of the air outlet channel forming the chimney effect is maximized along the spacing direction of the heat sink 11, thereby ensuring the air inlet area of ​​the air outlet channel and the suction force of the chimney effect.

[0070] In certain embodiments of the present application, the length of the air outlet channel along the vertical direction is greater than 10 mm.

[0071] It should be noted that the greater the vertical length of the air outlet channel, the greater the suction force of the chimney effect. The length of the air outlet channel is set within the above range, so that the size is not too large while ensuring that the heat dissipation device has sufficient air flow rate, thereby ensuring the compactness of the structure.

[0072] In some embodiments of the present application, the air outlet component 2 is made of metal.

[0073] The air outlet component 2 made of metal material has heat exchange capability on the premise of realizing natural convection of wind, so that the area of ​​the air outlet component 2 can be further utilized for heat dissipation, further ensuring the heat dissipation effect of the heat dissipation device.

[0074] It should be noted that, without considering the heat exchange effect of the air outlet component 2, the air outlet component 2 can be made of non-metallic materials, such as rubber, high-temperature resistant plastic, etc.

[0075] In some embodiments of the present application, the heat sink 11 is a straight fin, which has a simple structure and is easy to manufacture and process. Of course, the heat sink 11 is not limited to a straight fin. In order to further enhance the heat exchange effect, the heat sink 11 can also be any one of a V-shaped fin, a Y-shaped fin, and a special-shaped fin that is more conducive to heat dissipation.

[0076] In certain embodiments of the present application, the cross-section of the air outlet channel is a constant cross-section or a variable cross-section.

[0077] The term "equal cross-section" means that a plurality of cross-sections of the air outlet passage parallel to the horizontal plane are obtained sequentially from bottom to top, and the shapes of the plurality of cross-sections are consistent, that is, the diameters of the air outlet passage are consistent along the vertical direction.

[0078] Variable cross-section means that multiple cross-sections of the air outlet channel parallel to the horizontal plane are obtained in sequence from bottom to top, and the shapes of the multiple cross-sections are inconsistent, that is, the diameter size of the air outlet channel changes along the vertical direction; for example, the air outlet channel is a truncated cone or a prism-shaped structure that is larger at the top and smaller at the bottom, or smaller at the top and larger at the bottom.

[0079] The cross-sectional shape of the air outlet channel is any of a circle, a quasi-circle, an ellipse, a polygon, and an irregular shape. The polygon may be a triangle, a square, a rectangle, a trapezoid, a regular polygon, an irregular polygon, etc. The air outlet channel is a vertical channel structure, and the cross-sectional shape of the air outlet channel can be flexibly set according to actual needs.

[0080] The components and devices involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the drawings. As will be appreciated by those skilled in the art, these components and devices can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, meaning "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0081] It should also be noted that in the device of the present application, each component can be decomposed and / or reassembled, and these decompositions and / or reassemblies should be regarded as equivalent solutions of the present application.

[0082] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0083] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

[0084] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat dissipation device, characterized in that: include: A radiator (1) comprises a plurality of radiating fins (11) arranged at intervals, wherein gaps between adjacent radiating fins (11) form an air inlet channel; An air outlet component (2) is arranged above the heat sink (11) and has an air outlet channel connected to the upper opening (112) of the air inlet channel, so that air entering the air inlet channel and exchanging heat with the heat sink can flow upward from the air outlet channel.

2. The heat dissipation device according to claim 1, characterized in that: The air outlet component (2) comprises an air outlet cavity (21) forming the air outlet channel, and a wind shield (22) arranged at the bottom of the air outlet cavity (21), wherein the wind shield (22) covers the upper opening (112).

3. The heat dissipation device according to claim 1, characterized in that: Along the extension direction of the heat sink (11), the heat sink (1) comprises a middle area and two edge areas located on both sides of the middle area; The bottom of the air outlet component (2) is arranged in the middle area.

4. The heat dissipation device according to claim 1, characterized in that: A mounting groove (111) is provided above the heat sink (11), and an end portion of the air outlet component (2) is arranged in the mounting groove (111).

5. The heat dissipation device according to claim 4, characterized in that: The mounting groove (111) is adapted to the wind shield (22).

6. The heat dissipation device according to claim 1, characterized in that: The air outlet component (2) is naturally placed above the heat sink (11); or, The air outlet component (2) is welded above the heat sink (11).

7. The heat dissipation device according to claim 1, characterized in that: Along the direction in which the plurality of heat sinks (11) are spaced apart, the air outlet component (2) is in communication with all of the upper openings (112).

8. The heat dissipation device according to claim 1, characterized in that: In the vertical direction, the length of the air outlet channel is greater than 10 mm.

9. The heat dissipation device according to claim 1, characterized in that: The air outlet component (2) is made of metal.

10. The heat dissipation device according to claim 1, characterized in that: The heat sink (11) is any one of a straight fin, a V-shaped fin, a Y-shaped fin, and a special-shaped fin; and / or, The cross section of the air outlet channel is a constant cross section or a variable cross section.

Images