CN220528445U - Radiator - Google Patents

Abstract

The utility model relates to the technical field of heat dissipation equipment, in particular to a radiator. The radiator comprises a base, a heat pipe unit and a heat radiating unit, wherein the base is provided with a mounting groove, the heat pipe unit comprises a first heat pipe and a plurality of heat pipe modules, the first heat pipe is arranged in the mounting groove along a first direction, the heat pipe modules comprise a plurality of second heat pipes and a plurality of third heat pipes, parts of each second heat pipe are all abutted with the first heat pipe, each third heat pipe is abutted with at least one second heat pipe, the second heat pipes and the third heat pipes are sequentially arranged along a second direction, the heat radiating unit comprises a plurality of heat radiating fins which are parallel along the first direction and are arranged at intervals, and parts of the second heat pipes and the third heat pipes are arranged on the heat radiating fins. The radiator absorbs heat of the heating element through the first heat pipe and conducts heat through the second heat pipe and the third heat pipe, so that the heat conduction distance of the heating element with the same area is enlarged, the heat dissipation efficiency is improved, and the heat conduction efficiency of the unit area of the radiator is improved.

Description

Radiator

Technical Field

The utility model relates to the technical field of heat dissipation equipment, in particular to a radiator.

Background

The radiator can heat the heating element and dissipate heat, so that the normal operation of the heating element is ensured. In the application process, the power of different heating elements is different, so that the heat generated by the heating elements is different.

The existing radiator comprises a heat pipe unit and a radiating unit, wherein the heat pipe unit is used for absorbing heat from a heating element and conducting the heat to the radiating unit for radiating. When the heat generating member generates a large amount of heat, the heat pipe unit is required to have a high thermal conductivity. However, the existing heat pipe unit cannot conduct heat to a far distance for heat dissipation, so that under the condition of the same heat-taking area, the heat dissipation power of the radiator is limited due to the limitation of the heat conduction distance of the heat conduction unit, namely the heat conductivity of the unit area of the radiator is low.

In order to solve the above-mentioned problems, it is needed to provide a heat sink.

Disclosure of Invention

The utility model aims to provide a radiator, which absorbs heat of a heating element through a first heat pipe and conducts heat through a second heat pipe and a third heat pipe, so that the heat conduction distance of the heating element with the same area is enlarged, the heat dissipation efficiency is further improved, and the heat conduction efficiency of the radiator in unit area is improved.

To achieve the purpose, the utility model adopts the following technical scheme:

a heat sink, comprising:

the base is used for installing the heating element and is provided with an installation groove;

the heat pipe unit comprises a first heat pipe and a plurality of heat pipe modules, wherein the first heat pipe is arranged in the mounting groove along a first direction, the plurality of heat pipe modules are arranged in parallel along the first direction at intervals, the heat pipe modules comprise a plurality of second heat pipes and a plurality of third heat pipes, part of each second heat pipe is abutted with the first heat pipe, each third heat pipe is abutted with at least one second heat pipe, the second heat pipes and the third heat pipes are sequentially arranged along a second direction, the second direction is a direction far away from the first heat pipe, and the first direction and the second direction are mutually perpendicular; and

the heat dissipation unit comprises a plurality of heat dissipation fins which are parallel along the first direction and are arranged at intervals, and part of the second heat pipe and the third heat pipe are arranged on the heat dissipation fins.

As an alternative, the second heat pipe includes:

the heat absorption part is in butt joint with the first heat pipe and extends along a third direction, and the third direction is perpendicular to the first direction and the second direction; and

the two heat conduction parts are respectively connected with two ends of the heat absorption part and extend in a direction away from the heat absorption part, and the heat conduction parts are fixed on the radiating fins.

As an alternative, the plurality of second heat pipes of each group of the heat pipe modules at least includes two second heat pipes having a trapezoid structure, the width of each second heat pipe having a trapezoid structure is gradually reduced along the direction of the second direction, and the inner peripheral outline of the heat conducting portion of one of the second heat pipes is larger than the outer peripheral outline of the heat conducting portion of the other second heat pipe.

As an alternative, at least one of the second heat pipes of each group of the heat pipe modules includes a second heat pipe having a gate shape, and the heat conducting portion of the second heat pipe includes:

the two first heat conduction parts are symmetrically arranged on two sides of the two heat absorption parts, and the two first heat conduction parts and the heat absorption parts form a preset included angle and extend in a direction away from the heat absorption parts;

the two second heat conduction parts are respectively connected with one ends of the two first heat conduction parts far away from the heat absorption part, and the second heat conduction parts extend in an arc shape in a direction approaching to each other; and

the two third heat conduction parts are respectively connected with the two second heat conduction parts in the direction away from the first heat conduction part and extend towards the direction close to the heat absorption part.

As an alternative, the third heat pipe is arranged in a shape of a mouth, trapezoid or gate.

As an alternative, the cross-sectional shapes of the second heat pipe and the third heat pipe are elliptical, and the thickness of the second heat pipe and the third heat pipe is 1 mm-2.5 mm.

As an alternative, the heat sink includes:

the first radiating fins are arranged along the second direction, and the plurality of second heat pipes are arranged on the first radiating fins;

the second radiating fins are parallel to the first radiating fins, the second radiating fins and the first radiating fins are arranged in a step mode along the direction away from the first heat pipes, and the third heat pipes are arranged on the second radiating fins; and

and the connecting part is used for connecting the first radiating fin and the second radiating fin.

As an alternative, the heat sink includes:

a body configured to fix the second heat pipe and the third heat pipe; and

the distance control pieces are perpendicular to the body, and one end, away from the body, of each distance control piece is abutted with the body adjacent to the radiating fin; and

the distance control plate is perpendicular to the body and is arranged at one end of the body away from the base, and one end of the distance control plate away from the body is abutted with the body of the adjacent cooling fin.

As an alternative, the cross-sectional shape of the first heat pipe is square.

As an alternative, the heat sink further includes:

the two pressing strips are respectively arranged at two ends of the second heat pipe along the first direction; and

the pressing plate comprises a heat absorption part, the pressing plate penetrates through a gap between the heat absorption part and the radiating fin along the first direction, and two ends of the pressing plate are fixed on the pressing strip.

The beneficial effects of the utility model are as follows:

the utility model provides a radiator, which comprises a base, a heat pipe unit and a heat radiating unit, wherein the base is used for installing a heating element, the base is provided with an installation groove, the heat pipe unit comprises a first heat pipe and a plurality of heat pipe modules, the first heat pipe is arranged in the installation groove along a first direction, the plurality of heat pipe modules are arranged in parallel along the first direction at intervals, parts of the heat pipe modules are abutted to the first heat pipe, the heat pipe modules comprise a plurality of second heat pipes and a plurality of third heat pipes, parts of each second heat pipe are abutted to the first heat pipe, each third heat pipe is abutted to at least one second heat pipe, the second heat pipes and the third heat pipes are sequentially arranged along a second direction, the second direction is away from the first heat pipe, the first direction and the second direction are mutually perpendicular, the heat radiating unit comprises a plurality of radiating fins which are arranged in parallel along the first direction at intervals, and parts of the second heat pipes and the third heat pipes are arranged on the radiating fins. The radiator absorbs heat of the heating element through the first heat pipe, and conducts heat through the second heat pipe and the third heat pipe, so that the heat conduction distance of the heating element with the same area is enlarged, the heat dissipation efficiency is improved, and the heat conduction efficiency of the unit area of the radiator is improved. Meanwhile, the second heat pipes and the third heat pipes can increase the livestock areas of the heat pipe modules and the cooling fins, so that the cooling fins reach isothermal bodies as much as possible and each temperature difference value is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following description will briefly explain the drawings needed in the description of the embodiments of the present utility model, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the contents of the embodiments of the present utility model and these drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a radiator according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a heat pipe unit and a heat dissipation unit according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a heat sink according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of a radiator according to an embodiment of the present utility model.

The figures are labeled as follows:

100-base;

200-a heat pipe unit; 210-a first heat pipe; 220-a heat pipe module; 221-a second heat pipe; 2211-a heat absorbing part; 2212—a heat conduction section; 2212a—a first heat conduction section; 2212 b-a second heat conduction part; 2212c—a third heat conduction section; 222-a third heat pipe;

300-a heat dissipation unit; 310-heat sink; 311-body; 3111-first heat sink; 3112-second heat sinks; 3113-a connection; 312-distance control piece; 313-a distance control plate;

400-layering;

500-pressing plate.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only a part of structures related to the present utility model, not the whole structures, are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be the communication of structures in two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a heat sink, which includes a base 100, where the base 100 is used to mount a heat generating component, and the heat generating component may be various heat generating structures such as an LED lamp, a circuit board, and the like. Meanwhile, the base 100 is also used for other structures for providing a heat sink.

With continued reference to fig. 1, in this embodiment, the base 100 is provided with a mounting groove, and the heat sink further includes a heat pipe unit 200 and a heat dissipation unit 300. The heat pipe unit 200 is configured to absorb heat of the heat generating element, and conduct heat, and the heat dissipation unit 300 is configured to diffuse the heat of the heat pipe unit 200, so as to achieve the heat dissipation effect of the radiator. Specifically, the heat pipe unit 200 includes a first heat pipe 210 and a plurality of heat pipe modules 220, the first heat pipe 210 is disposed in an installation groove along an X direction (a first direction), the plurality of heat pipe modules 220 are disposed in parallel and spaced along the X direction, a portion of the heat pipe module 220 abuts against the first heat pipe 210, the heat pipe module 220 includes a plurality of second heat pipes 221 and a plurality of third heat pipes 222, a portion of each second heat pipe 221 abuts against the first heat pipe 210, each third heat pipe 222 abuts against at least one second heat pipe 221, the second heat pipes 221 and the third heat pipes 222 are sequentially disposed along a Z direction (a second direction), the Z direction is a direction away from the first heat pipe 210, the X direction and the Z direction are mutually perpendicular, the heat dissipation unit 300 includes a plurality of heat dissipation fins 310 disposed in parallel and spaced along the X direction, and the portions of the second heat pipes 221 and the third heat pipes 222 are disposed on the heat dissipation fins 310. The heat radiator absorbs the heat of the heating element through the first heat pipe 210, and conducts heat through the second heat pipe 221 and the third heat pipe 222, so that the heat conducting distance of the heating element with the same area is enlarged, the heat radiating efficiency is further improved, and the heat conducting efficiency of the unit area of the heat radiator is improved. Meanwhile, the second heat pipes 221 and the third heat pipes 222 can increase the livestock areas of the heat pipe module 220 and the heat sink 310, so as to reduce the temperature difference of each point when the heat sink 310 reaches isothermal temperature as much as possible.

In order to ensure the contact effect between the second heat pipe 221 and the third heat pipe 222, the second heat pipe 221 and the third heat pipe 222 are soldered by a thermally conductive solder paste.

As shown in fig. 1 and 2, optionally, the first heat pipes 210 are plural, and the plural first heat pipes 210 are disposed in parallel and in contact with each other to increase the heat absorption area of the first heat pipes 210. In order to ensure the heat transfer and conduction effect between the adjacent first heat pipes 210, the cross-sectional shape of the first heat pipe 210 is square, so that the contact area between the two adjacent first heat pipes 210 is increased, the first heat pipes 210 can conduct heat in both the X direction and the Y direction, and the uniformity of the heat conduction effect of the radiator is ensured. Illustratively, the cross-sectional shape of the first heat pipe 210 is 4mm by 9mm.

In the prior art, the base 100 is formed by machining, and the length of the first heat pipe 210 can be adjusted, but in order to adjust the length of the first heat pipe 210, the structure of the base 100 needs to be changed according to the size of the first heat pipe 210 and the position of the first heat pipe 210, and the machining is performed again, so that the efficiency is low and the cost is high. In the embodiment, the first heat pipe 210 can be flexibly arranged according to the position of the heating element, and the first heat pipe 210 is fixed in the mounting groove by the heat conducting glue, and the adjustment can be realized only by changing the heat pipe die, so that the efficiency is high and the cost is low.

During processing, the first heat pipes 210 are fixed in the mounting groove through the heat conducting glue, so that the effect of fixing the first heat pipes 210 can be achieved, the heat conducting effect between adjacent first heat pipes 210 can be guaranteed, the heat conducting glue can fill gaps between the first heat pipes 210 and the base 100, and the fixing effect of the first heat pipes 210 is improved. After the first heat pipe 210 is fixed, the glue on the surface of the first heat pipe 210 needs to be removed because the heat conductivity of the heat conducting glue is low, meanwhile, a plurality of first heat pipes 210 are arranged together to form a certain height difference, the height difference exists between the first heat pipe 210 and the base 100, and the preset thickness can be removed on the surfaces of the base 100 and the first heat pipe 210 in a CNC (computer numerical control) processing mode, so that the glue removing effect is achieved, meanwhile, the base 100 and the first heat pipe 210 are located at the same height, and the surface flatness of the base 100 is ensured.

Since the second heat pipe 221 and the third heat pipe 222 have water therein, the water is absorbed from the cold end to the hot end by the capillary structure inside the second heat pipe 221 and the third heat pipe 222. In the working process, if the hot end is at the upper part and the cold end is at the lower part, the water needs to overcome the gravity of the water. The greater the distance between the hot and cold ends, the greater the work that the water needs to perform, and when the distance between the hot and cold ends reaches the limit, the water cannot return to the hot end, which results in the first and second heat pipes 210 and 221 failing to absorb and conduct heat. Therefore, it is critical to control the distances of the cold and hot ends of the second and third heat pipes 221 and 222 and the total length of the second and third heat pipes 221 and 222. Since each of the second heat pipe 221 and the third heat pipe 222 independently works, the heat conduction is realized through multiple relay between the first heat pipe 210 and the second heat pipe 221 and between the second heat pipe 221 and the third heat pipe 222 in the embodiment, which not only prolongs the heat conduction distance of the heat pipe unit 200, but also ensures that each of the second heat pipe 221 and the third heat pipe 222 effectively works.

Further, the second heat pipe 221 includes a heat absorbing portion 2211 and two heat conducting portions 2212. The heat absorbing portion 2211 is abutted to the first heat pipe 210, the heat absorbing portion 2211 extends along the third direction, the Y direction is perpendicular to the X direction and the Z direction, the two heat conducting portions 2212 are connected with two ends of the heat absorbing portion 2211 respectively and extend towards a direction away from the heat absorbing portion 2211, the heat conducting portions 2212 are fixed on the heat radiating fin 310, and the second heat pipe 221 can extend a heat conducting range through the heat conducting portions 2212, so that heat conductivity of the heat radiator is guaranteed.

In order to ensure that each second heat pipe 221 contacts with the heat sink 310, thereby ensuring heat dissipation efficiency, the heat conducting portions 2212 of the plurality of second heat pipes 221 of the heat pipe module 220 contact with the heat sink 310, and the plurality of heat conducting portions 2212 of each group of heat pipe modules 220 are arranged coplanar, so as to increase the contact area between the heat conducting portions 2212 and the heat sink 310. Illustratively, each set of heat pipe modules 220 may include two, three, four, or even more second heat pipes 221, the greater the number of second heat pipes 221, the better the heat transfer effect. However, to avoid excessive weight of the heat sink, each heat pipe module 220 in this embodiment includes three second heat pipes 221. In the case of ensuring that the three heat conductive portions 2212 of the three second heat pipes 221 are all in contact with the heat sink 310, the three heat absorbing portions 2211 of the three second heat pipes 221 form a certain angle with the heat conductive portions 2212, and the end surfaces of the three heat absorbing portions 2211 are abutted with the end surfaces of the first heat pipes 210, so that the contact area of the heat absorbing portions 2211 with the first heat pipes 210 is ensured, and the heat absorbing effect is further improved.

Optionally, since the plurality of second heat pipes 221 of each group of heat pipe modules 220 includes at least two second heat pipes 221 with a trapezoid structure, the width of the second heat pipe 221 with a trapezoid structure gradually decreases along the direction of the Z direction, so as to ensure that the length of the heat absorbing portion 2211 is larger, and a better heat absorbing effect is provided, and the width of the heat conducting portion 2212 with a trapezoid structure gradually decreases, so that the length of the heat conducting portion 2212 can be reduced, and further, the heat conducting effect is ensured. The inner peripheral contour of the heat conductive portion 2212 of one of the second heat pipes 221 is larger than the outer peripheral contour of the heat conductive portion 2212 of the other second heat pipe 221 to ensure that the two second heat pipes 221 are arranged on the heat sink 310 in a coplanar manner.

The plurality of second heat pipes 221 of each heat pipe module 220 includes at least one second heat pipe 221 having a gate shape, and the heat conducting portion 2212 of the second heat pipe 221 includes two first heat conducting portions 2212a, two second heat conducting portions 2212b, and two third heat conducting portions 2212c. The two first heat conductive portions 2212a are symmetrically disposed at two sides of the two heat absorbing portions 2211, the two first heat conductive portions 2212a and the heat absorbing portions 2211 form a preset included angle to extend away from the heat absorbing portions 2211, the two second heat conductive portions 2212b are respectively connected with one ends of the two first heat conductive portions 2212a away from the heat absorbing portions 2211, the second heat conductive portions 2212b extend in an arc shape to be close to each other, the two third heat conductive portions 2212c are respectively connected with the two second heat conductive portions 2212b away from the first heat conductive portions 2212a and extend in a direction close to the heat absorbing portions 2211, so that the contact area between the second heat pipe 221 and the heat dissipation fin 310 is increased, and the heat conductive effect is improved.

Meanwhile, the third heat pipe 222 is arranged in a shape of a mouth, trapezoid, or gate. When the third heat pipe 222 is in a shape of a Chinese character 'kou' or a trapezoid, the structure of the third heat pipe 222 close to the second heat pipe 221 is abutted against the second heat pipe 221, so as to realize heat conduction between the second heat pipe 221 and the third heat pipe 222. When the third heat pipe 222 is in a gate-shaped structure, the structure is close to the second heat pipe 221 with a gate-shaped structure, and only the gate-shaped opening direction is opposite to the second heat pipe 221, so as to reduce the heat conduction length of the third heat pipe 222, and further ensure the heat conduction efficiency of the third heat pipe 222.

The cross-sectional shapes of the second heat pipe 221 and the third heat pipe 222 are elliptical, and the thickness of the second heat pipe 221 and the third heat pipe 222 is 1 mm-2.5 mm, so that the effect of increasing the width of the air passage between two adjacent cooling fins 310 is increased, and the heat dissipation effect is further improved. Illustratively, the elliptical-like cross-sections of the second heat pipe 221 and the third heat pipe 222 are formed by a flattening method, thereby minimizing the space occupied by the second heat pipe 221 and the third heat pipe 222 in the air duct, and thus increasing the space of the air duct for the gas to circulate.

It can be appreciated that the distance between two adjacent heat sinks 310 is an air passage for heat dissipation, thereby ensuring heat dissipation effect. Illustratively, the clearance of the air passage is controlled between 2.6mm and 6mm, thereby ensuring the heat dissipation effect.

Since the thickness of the heat sink 310 is too small, the heat conduction and heat dissipation effects are reduced, and an excessive thickness of the heat sink 310 may result in an excessive weight of the heat sink. To solve this problem, in the present embodiment, the thickness of the heat sink 310 is 0.2mm to 0.4mm, thereby ensuring the heat conduction and heat dissipation effects of the heat sink 310 and avoiding the excessive weight of the heat sink. Meanwhile, the thickness of the heat sink 310 can prevent the heat sink 310 from being increased in thickness, and the space between the adjacent heat sinks 310 from being reduced on the premise of the same size of the heat sink, thereby preventing the heat dissipation effect of the air duct from being affected due to the reduction of the width of the air duct.

Illustratively, the heat sink 310 is made of aluminum, which has high heat dissipation and heat conduction efficiency, and is beneficial to improving the heat dissipation effect of the heat sink. Meanwhile, the heat sink 310 is treated with electroless nickel, so that subsequent solder paste welding is ensured. The heat sink 310 is provided with a plurality of fastening points for fastening the second heat pipe 221 and the third heat pipe 222, so that the second heat pipe 221, the third heat pipe 222 and the heat sink 310 are tightly attached to each other when welded, and the welding effect is ensured.

Referring to fig. 3, further, the heat sink 310 includes a body 311 and a plurality of distance controlling members 312. The body 311 is configured to fix the second heat pipe 221 and the third heat pipe 222, the plurality of distance control members 312 are perpendicular to the body 311, and one end of the distance control member 312 away from the body 311 is abutted with the body 311 of the adjacent heat sink 310, so as to ensure the distance between the adjacent heat sinks, ensure the width of the air passage, and further ensure that the interval of the air passage is uniformly arranged in the heat sink 310.

In addition, the heat sink 310 further includes a distance control plate 313, the distance control plate 313 is perpendicular to the body 311 and is disposed at one end of the body 311 away from the base 100, the one end of the distance control plate 313 away from the body 311 is abutted with the body 311 of the adjacent heat sink 310, so as to further ensure the distance between the adjacent heat sinks, ensure the width of the air passage, and further ensure that the interval of the air passage is uniformly disposed in the heat sink 310.

The body 311 of the heat sink 310 includes a first heat sink 3111, a second heat sink 3112, and a connection 3113. The first heat pipes 3111 are disposed along the Z direction, the plurality of second heat pipes 221 are disposed on the first heat pipes 3111, the second heat pipes 3112 are parallel to the first heat pipes 3111, the second heat pipes 3112 are disposed in a step along a direction away from the first heat pipes 210, the plurality of third heat pipes 222 are disposed on the second heat pipes 3112, and the connection portion 3113 is used for connecting the first heat pipes 3111 and the second heat pipes 3112, so as to ensure that the first heat pipes 3111 and the plurality of second heat pipes 221 are simultaneously abutted, and the second heat pipes 3112 and the plurality of third heat pipes 222 are simultaneously abutted, so as to achieve the purpose of ensuring heat conduction and heat dissipation.

In addition, in the present embodiment, each of the first heat pipe 210, the second heat pipe 221 and the third heat pipe 222 is soldered by solder paste, which is beneficial to reducing contact thermal resistance and improving power of the radiator.

As shown in fig. 4, optionally, the heat sink further includes a pressing plate 500 and two pressing strips 400, the two pressing strips 400 are respectively disposed at two ends of the second heat pipe 221 along the X direction, the pressing plate 500 passes through a gap between the heat absorbing portion 2211 and the heat dissipating fin 310 along the first direction, and two ends of the pressing plate 500 are fixed on the pressing strips 400, and the two pressing strips 400 can manage two ends of the first heat pipe 210 and the second heat pipe 221, so as to improve the stability of assembling the first heat pipe 210 and the second heat pipe 221, and be beneficial to strengthening the strength of the base 100 and the pressing plate 500. The pressing plate 500 is used to fix the heat absorbing parts 2211 of the plurality of second heat pipes 221 so as to be in contact with the first heat pipes 210.

Further, the thickness of the pressing plate 500 is between 3mm and 4mm, so that the defect that the pressing plate 500 is too small in thickness and insufficient in pressure is avoided, the thickness is too large, the overall gravity of the radiator is increased, and cost reduction is facilitated.

Note that the basic principles and main features of the present utility model and advantages of the present utility model are shown and described above. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, but rather, the foregoing embodiments and description illustrate the principles of the utility model, and that various changes and modifications may be effected therein without departing from the spirit and scope of the utility model as defined by the appended claims and their equivalents.

Claims (10)

1. A heat sink, comprising:

the base (100) is used for installing the heating element, and the base (100) is provided with an installation groove;

the heat pipe unit (200), the heat pipe unit (200) comprises a first heat pipe (210) and a plurality of heat pipe modules (220), the first heat pipe (210) is arranged in the mounting groove along a first direction, the plurality of heat pipe modules (220) are arranged in parallel and at intervals along the first direction, the heat pipe modules (220) comprise a plurality of second heat pipes (221) and a plurality of third heat pipes (222), parts of each second heat pipe (221) are abutted with the first heat pipe (210), each third heat pipe (222) is abutted with at least one second heat pipe (221), the second heat pipes (221) and the third heat pipes (222) are sequentially arranged along a second direction, the second direction is a direction away from the first heat pipe (210), and the first direction and the second direction are mutually perpendicular; and

and the heat dissipation unit (300) comprises a plurality of heat dissipation fins (310) which are parallel along the first direction and are arranged at intervals, and part of the second heat pipe (221) and the third heat pipe (222) are arranged on the heat dissipation fins (310).

2. The heat sink according to claim 1, wherein the second heat pipe (221) comprises:

a heat absorbing portion (2211) abutted to the first heat pipe (210), wherein the heat absorbing portion (2211) extends along a third direction, and the third direction is perpendicular to the first direction and the second direction; and

and two heat conduction parts (2212), wherein the two heat conduction parts (2212) are respectively connected with two ends of the heat absorption part (2211) and extend in a direction away from the heat absorption part (2211), and the heat conduction parts (2212) are fixed on the heat dissipation plate (310).

3. The heat sink according to claim 2, wherein at least two second heat pipes (221) of the plurality of heat pipe modules (220) are included in the plurality of second heat pipes (221) of each group of heat pipe modules (220), the width of the second heat pipes (221) of the trapezoid structure is gradually reduced along the direction of the second direction, and the inner peripheral contour of the heat conducting portion (2212) of one of the second heat pipes (221) is larger than the outer peripheral contour of the heat conducting portion (2212) of the other of the second heat pipes (221).

4. The heat sink according to claim 2, wherein at least one of the plurality of second heat pipes (221) of each group of the heat pipe modules (220) includes the second heat pipe (221) having a gate shape, and the heat conduction portion (2212) of the second heat pipe (221) includes:

the two first heat conduction parts (2212 a) are symmetrically arranged on two sides of the two heat absorption parts (2211), and the two first heat conduction parts (2212 a) and the heat absorption parts (2211) form a preset included angle to extend in a direction away from the heat absorption parts (2211);

two second heat conducting parts (2212 b), wherein the two second heat conducting parts (2212 b) are respectively connected with one ends of the two first heat conducting parts (2212 a) far away from the heat absorbing part (2211), and the second heat conducting parts (2212 b) extend in an arc-shaped direction towards each other; and

and two third heat conduction parts (2212 c), wherein the two third heat conduction parts (2212 c) are respectively connected with the two second heat conduction parts (2212 b) in a direction away from the first heat conduction parts (2212 a) and extend in a direction approaching to the heat absorption parts (2211).

5. The heat sink according to claim 1, wherein the third heat pipe (222) is arranged in a mouth shape, a trapezoid shape or a gate shape.

6. The heat sink according to claim 1, wherein the cross-sectional shape of the second heat pipe (221) and the third heat pipe (222) is elliptical, and the thickness of the second heat pipe (221) and the third heat pipe (222) is 1 mm-2.5 mm.

7. The heat sink according to any one of claims 1-6, wherein the heat sink (310) comprises:

a first heat sink (3111) disposed along the second direction, the plurality of second heat pipes (221) being disposed on the first heat sink (3111);

a second heat sink (3112) parallel to the first heat sink (3111), wherein the second heat sink (3112) and the first heat sink (3111) are arranged in a stepped manner in a direction away from the first heat pipe (210), and a plurality of third heat pipes (222) are arranged on the second heat sink (3112); and

and a connection part (3113) for connecting the first heat sink (3111) and the second heat sink (3112).

8. The heat sink according to any one of claims 1-6, wherein the heat sink (310) comprises:

-a body (311) configured to fix the second heat pipe (221) and the third heat pipe (222); and

a plurality of distance control pieces (312) which are arranged perpendicular to the body (311), wherein one end of each distance control piece (312) far away from the body (311) is abutted with the body (311) adjacent to the radiating fin (310); and

the distance control plate (313) is perpendicular to the body (311) and is arranged at one end, far away from the base (100), of the body (311), and one end, far away from the body (311), of the distance control plate (313) is abutted with the body (311) of the adjacent radiating fin (310).

9. The heat sink according to any one of claims 1-6, characterized in that the first heat pipe (210) has a square cross-sectional shape.

10. The heat sink according to any one of claims 1 to 6, further comprising:

two pressing strips (400), wherein the two pressing strips (400) are respectively arranged at two ends of the second heat pipe (221) along the first direction; and

the second heat pipe (221) comprises a heat absorbing part (2211), the pressing plate (500) penetrates through a gap between the heat absorbing part (2211) and the radiating fin (310) along the first direction, and two ends of the pressing plate (500) are fixed on the pressing strip (400).