CN103260379B

CN103260379B - Heat radiation module

Info

Publication number: CN103260379B
Application number: CN201210039068.1A
Authority: CN
Inventors: 刘智仁
Original assignee: Furui Precise Component Kunshan Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Furui Precise Component Kunshan Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2012-02-21
Filing date: 2012-02-21
Publication date: 2017-06-06
Anticipated expiration: 2032-02-21
Also published as: CN103260379A

Abstract

A kind of heat radiation module, its fin for including the substrate thermally contacted with thermal source and setting some intervals on the substrate.These fin enclose and set to form an accommodating cavity.The heat radiation module is also included a support and first impeller and the second impeller of the support both sides is articulated in by a rotating shaft.The support is set on a heat sink, and second impeller is arranged in the accommodating cavity, and first impeller is located at the top of the fin.After substrate absorbs the heat of thermal source, distributed by fin, make the air heats around fin, hot-air rises and drives the rotation of the first impeller, and the first impeller drives the rotation of the second impeller and makes the heat Quick diffusing in accommodating cavity, so as to increase cross-ventilation, improve radiating efficiency, and the power of wheel rotation comes from the thermal current of rising, it is not necessary to extra electric power input, energy-conservation purpose is can reach.

Description

Heat radiation module

Technical field

The present invention relates to a kind of heat radiation module, more particularly to a kind of heat radiation module for being radiated to heat-generating electronic elements.

Background technology

At present, in electronic product, the electronic component larger for caloric value is generally radiated using heat radiation module to it. The radiating mode of existing heat radiation module includes passive radiating and active heat removal, and passive radiating is connect using a radiator and thermal source Touch, without radiator fan, radiated using free convection, but the coefficient of heat convection of Natural Heat Convection is extremely low, about 10 ~ 20W/ m²K, heat exchanger effectiveness is quite bad；Active heat removal is to carry out forced convertion radiating to radiator using a fan, however it is necessary that Extra power supply drives fan, compares the waste energy.

The content of the invention

In view of this, it is necessary to provide that a kind of radiating efficiency is higher and heat radiation module of energy-conservation.

A kind of heat radiation module, it includes the substrate thermally contacted with thermal source and setting some intervals on the substrate Fin.These fin enclose and set to form an accommodating cavity.The heat radiation module is also included a support and is pivotally connected by a rotating shaft In first impeller and the second impeller of the support both sides.The support is set on a heat sink, and second impeller is arranged at the appearance Put in chamber, first impeller is located at the top of the fin.After substrate absorbs the heat of thermal source, distributed by fin, made Air heats around fin, hot-air rise and drive the first impeller rotation, the first impeller drive the second impeller rotation and Make the heat Quick diffusing in accommodating cavity.

Above-mentioned heat radiation module drives the first impeller being arranged on above fin to rotate using thermal current rising, and the The rotation of one impeller drives the second impeller rotation being arranged in the accommodating cavity that fin is surrounded again, and the rotation of the second impeller can Air in disturbance accommodating cavity, so as to increase cross-ventilation, improves radiating efficiency, and the power of wheel rotation comes from The thermal current of rising, it is not necessary to extra electric power input, can reach energy-conservation purpose.

Brief description of the drawings

Fig. 1 is the dimensional structure diagram of the heat radiation module in embodiment of the present invention.

Fig. 2 is the decomposition texture schematic diagram of the heat radiation module in Fig. 1.

Fig. 3 is the decomposition texture schematic diagram in another direction of the heat radiation module in Fig. 1.

Main element symbol description

Heat radiation module	100
		Substrate	10
Groups of fins	20
		Support	30
Rotating shaft	40
		First impeller	50
Second impeller	60
		Thermal source	70
Top surface	11
		Bottom surface	12
Fin	21
		Heat dissipation channel	22
Accommodating cavity	23
		Supporting part	31
Bearing portion	32
		Connecting portion	33

Following specific embodiment will further illustrate the present invention with reference to above-mentioned accompanying drawing.

Specific embodiment

Below in conjunction with accompanying drawing, the present invention is described in further detail.

Fig. 1, Fig. 2 and Fig. 3 are referred to, it is right that a kind of heat radiation module 100 that a better embodiment of the invention is provided is used for Thermal source 70 radiates.The heat radiation module 100 includes a substrate 10, the groups of fins 20 being arranged on the substrate 10, is arranged on this A support 30 in groups of fins 20 and one first impeller 50 and one second leaf that are articulated in by rotating shaft 40 on the support 30 Wheel 60.The thermal source 70 is sticked on the substrate 10.

The substrate 10 is rounded, including relative top surface 11 and bottom surface 12.The thermal source 70 is sticked at the middle part of bottom surface 12. The groups of fins 20 is made up of the fin 21 of some long plate shapes, and the fin 21 is in a up-narrow and down-wide trapezoidal tabular knot Structure, some fin 21 are arranged on the edge of the top surface 11 of substrate 10 around the center vertical of the top surface 11 of substrate 10, make radiating Piece group 20 is in a up-narrow and down-wide column structure.Some fin 21 are spaced along the circumference of substrate 10, adjacent two radiating Heat dissipation channel 22 is formed between piece 21.The innermost end of some fin 21 and the top surface of substrate are enclosed to form one and house Chamber 23.

In the present embodiment, the thermal source is a light emitting diode, it is to be understood that the thermal source is alternatively electronics product Other heat-generating electronic elements in product.

The support 30 includes the supporting part 31 of annular shape, is arranged on the bearing portion 32 of the center of supporting part 31 and connects Connect the connecting portion 33 of the supporting part 31 and bearing portion 32.The support 30 is arranged on top of the groups of fins 20 away from substrate 10, its Middle circular supporting part 31 is correspondingly arranged at the open-topped edge of the accommodating cavity 23 of groups of fins 20.

The rotating shaft 40 is connected with the bearing portion 32 of support 30, and its two ends extends respectively to the both sides of support 30.First leaf The wheel hub of the impeller 60 of wheel 50 and second is respectively fixedly connected with the two ends of rotating shaft 40, wherein the first impeller 50 is located at the top of support 30 Side, the second impeller 60 is located at the bottom side of support 30.The blade of the first impeller 50 is the centrifugation leaf that 10 one-tenth of opposing substrate is obliquely installed Piece, the blade of the second impeller 60 is the centrifuge blade of vertical substrate 10.First impeller 50 can drive the opposite brackets of the second impeller 60 30 rotate.

In assembling, the first impeller 50 and the second impeller 60 are separately positioned on the two ends of rotating shaft 40 first, then by the Two impellers 60 are arranged in the accommodating cavity 23 of groups of fins 20, and the supporting part 31 of support 30 is fixed on into the accommodating of groups of fins 20 The open-topped edge in chamber 23, now the first impeller 50 is positioned at outside, the top of groups of fins 20 of accommodating cavity 21.

The adstante febre of the thermal source 70, the substrate 10 absorb thermal source 70 heat after by these heats conduct to thereon dissipate On backing 21, by the outside radiating heat of fin 21.Therefore, the cold air around groups of fins 20 with the heat of fin 21 because handing over Change and be heated after rise.Due to the rising principle of hot-air, the thermal current of rising drives the first impeller 50 to rotate, and the first leaf Wheel 50 drives the second impeller 60 to rotate by the bearing portion 32 of support 30.When second impeller 60 is rotated, centrifuge blade thereon is disturbed Air in dynamic accommodating cavity 23, makes its quickening be overflowed from the heat dissipation channel 22 between fin 21, and take away simultaneously on fin 21 Heat, so as to increase the radiating efficiency of heat radiation module 100, and then ensure the stability of LED operation.

In the present embodiment, because the blade of first impeller 50 is obliquely installed, the thermal current for rising is conducive to drive the first leaf Wheel 50 rotates, and the blade of the second impeller 60 is vertically arranged the air agitation effect that can increase by the second impeller 60.

In the present embodiment, fin 21 is in a up-narrow and down-wide trapezoidal platy structure, and some fin 21 are in one A narrow lower column radiator structure wide, such structure can reduce obstruction, be conducive to the rising of thermal current.It is understood that The fin 21 can also be on platy structure or platy structure wide at the top and narrow at the bottom similarly hereinafter wide.

Compared to prior art, heat radiation module of the invention is driven using thermal current rising and is arranged on above fin First impeller rotates, and the rotation of the first impeller drives the second impeller rotation being arranged in the accommodating cavity that fin is surrounded, The rotation of the second impeller can disturb the air in accommodating cavity, so as to increase cross-ventilation, improve radiating efficiency, and impeller The power of rotation comes from the thermal current for rising, it is not necessary to extra electric power input, can reach energy-conservation purpose.

It is understood that for the person of ordinary skill of the art, can be done with technology according to the present invention design Go out change and deformation that other various pictures are answered, and all these changes and deformation should all belong to the protection model of the claims in the present invention Enclose.

Claims

1. a kind of heat radiation module, it includes the substrate thermally contacted with thermal source and sets dissipating for some intervals on the substrate Backing, it is characterised in that：These fin enclose and set to form an accommodating cavity, and the heat radiation module also includes a support and by one Rotating shaft is articulated in first impeller and the second impeller of the support both sides, and the support is set on a heat sink, and second impeller is set In the accommodating cavity, first impeller is located at the top of the fin, after substrate absorbs the heat of thermal source, by thereon Fin is distributed, and makes the air heats around fin, and hot-air rises and drives the rotation of the first impeller, and the first impeller drives the Two impellers rotate and make the heat Quick diffusing in accommodating cavity.

2. heat radiation module as claimed in claim 1, it is characterised in that：The substrate includes relative top surface and bottom surface, described Some fin are arranged on substrate top surface, and the thermal source is arranged in substrate bottom surface.

3. heat radiation module as claimed in claim 2, it is characterised in that：The fin is in a up-narrow and down-wide trapezoidal tabular knot Structure, some fin are vertically arranged in the edge of the top surface of substrate around the end face center of substrate, form one up-narrow and down-wide one Column radiator structure.

4. heat radiation module as claimed in claim 3, it is characterised in that：Some fin are spaced, formed each other There is heat dissipation channel.

5. heat radiation module as claimed in claim 1, it is characterised in that：The support includes circular supporting part, is arranged on The bearing portion and connection supporting part of the supporting part center are arranged on accommodating cavity with the connecting portion of bearing portion, the circular supporting part Open-topped edge.

6. heat radiation module as claimed in claim 5, it is characterised in that：The rotating shaft is connected with the bearing portion of support, its two ends Extend respectively to the both sides of support, the wheel hub of the first impeller and the second impeller is respectively fixedly connected with the two ends of rotating shaft.

7. heat radiation module as claimed in claim 1, it is characterised in that：The blade of the first impeller is opposing substrate into being obliquely installed Centrifuge blade, the blade of the second impeller is the centrifuge blade of vertical substrate.