JPS6153796A - Heat sink system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a heat dissipation system for cooling a heating element such as an electronic element, which is a main component of an electronic device. Examples of this type of heat dissipation system include those shown in FIGS. 3 and 4.

First, in FIG. 3, a heat dissipating body 107 having a plurality of heat dissipating fins 105 is bonded to the other side of a circuit board 103 having an electronic element 101 attached to its negative side. and electronic element 1
The heat generated at 01 is conducted from the circuit board 103 to the heat sink 107, and is radiated to the outside from the heat sink fins 105, thereby cooling the electronic element 101 and the circuit board 103.

However, when such a heat dissipation system is used horizontally, the thermal resistance caused by the holes formed in the circuit board 103 and the heat dissipation body 107 is large, making it difficult to efficiently dissipate heat from the heat dissipation fins 105. Further, when the electronic element 101 or the like is locally heated, there is a problem in that heat is not sufficiently radiated because heat conduction is mainly carried out in a few localized portions of the plurality of radiation fins 105.

On the other hand, in the heat dissipation system shown in FIG. 4, a container-shaped heat pipe 109 is fixed on the circuit board 103, and an evaporation chamber 111 is defined in the circuit board 103-1. A refrigerant 11 is placed at the bottom of this evaporation chamber 111 on the side of the circuit board 103.
3 is accommodated, and a plurality of heat radiation fins 115 are provided on the outer surface of the heat pipe 109. Therefore, in this conventional example, the heat generated by the electronic element 101 is absorbed by the coolant 113. The refrigerant 113 evaporates due to heat absorption, while being cooled above the heat pipe 109 by heat radiation from the radiation fins 115, condenses into liquid, and drips into the bottom of the evaporation chamber 111 again. Therefore, unlike the conventional example shown in FIG. 3, the thermal resistance does not increase, and even if the electronic element 101 etc. is locally heated, the evaporation of the refrigerant 113 is promoted accordingly, and the electronic element 101 and the The circuit board 103 can be cooled by −F compared to the conventional example shown in FIG.

By the way, in the conventional example shown in FIG. 4, in order to further increase the cooling 1JI effect, it is conceivable to provide a fan propeller 117 and perform forced cooling on the cooling air of this fan propeller 117. However, in this case, the drive motor 19 that drives the fan propeller 117 is required, and also the
7. In order to control the cooling air from the vent 117, a sensor that detects the temperature of heat generated by the electronic element 101, etc.
Based on this sensor, the drive motor 19 is
This would require a control device, etc., which would increase the cost.In response to these problems, the applicant has already proposed a new heat dissipation system as shown in Figure 5. 5 is a conceptual diagram, in which a turbine propeller 123 rotatably supported by a heat pipe 109 via a bearing 121 is rotated by the evaporative flow of the refrigerant 113, and is integrated with the turbine propeller 123. Due to the rotation of the inner magnet 125, which rotates automatically, the Auku Vl stone 127, which is magnetically coupled to the inner magnet 125, rotates.The rotation of the outer magnet 127 causes the bearing 1 to be attached to the outside of the heat pipe 109.
A fan propeller 13 is rotatably supported via a shaft 29.
1 is rotated. Therefore, the fan blower 131 can be rotated without requiring an external drive source such as a drive motor, and efficient heat radiation can be performed. The generation of evaporative flow is controlled,
Fan propeller 1 without the need for control θ11 equipment etc.
31, and improves heat dissipation efficiency while suppressing cost increase.This invention was developed in view of the above-mentioned conventional problems, and is based on the heat dissipation method previously submitted by the applicant. This is a further development of the system, which aims to further improve heat dissipation efficiency while suppressing cost increases. The purpose is to serve as the first and second part of the heat dissipation system.

[Explanation (Explanation 1) In order to achieve the above object, the present invention includes a container-shaped heat pipe attached to a heating element to partition an evaporation chamber; a refrigerant; a turbine propeller that is rotatably supported inside the evaporation chamber and rotated by the flow of the refrigerant; an inner magnet that is integrally supported on the turbine propeller side and is concentric with the turbine propeller; Rotatably supported on the outside of the pipe to cool the heat pipe)J
A fan propeller that causes a calm for J, and an inner (outer that is magnetically coupled to the magnet) that is integrally supported by the fan propeller 11111 and that is arranged around the outer circumference of the inner magnet in the rotating direction. It is made up of magnets.

[Example] The following is an example of the present invention based on FIG. ! An example will be explained in detail. Attaching the electronic element 1 as a photothermal body [The circuit board 3 is the main component of electronic equipment, and on the circuit board 3, a vibrator 5 is connected to a container-shaped heater 1 by bolts 7. The seafood T9 is fixed and sectioned on the circuit board 3. The inner bottom of this evaporation chamber 9 is in contact with the circuit board 1k3! I! A refrigerant 11 is housed therein. This cold one! -111J
+1]1 is formed so that heat is absorbed from the circuit board 3 side and the footrest is lowered.

On the other hand, a turbine propeller 13 is rotatably supported inside the i'+ff evaporator 9 and rotated by the evaporative flow of the refrigerant 11. This turbine propeller 13 is attached to the lower end of an inner blade shaft 15 having an axis in the vertical direction. A hollow part 15a is formed in the axial center of the inner blade shaft 15, and the inner blade shaft 15 has a hollow part 15a.
5 is being made lighter. And this inner 16
The stone 15 is rotatably supported via a first inner bearing 17a and a second inner bearing 17b. The first inner bearing 17,1 is supported by the heat pipe 5, and the second inner bearing 17,1 is supported by the heat pipe 5.
The inner bearing 17b is supported within a bearing socket 19 mounted on the top of the heat pipe 5. A collar 20 is interposed between the inner races of these inner bearings 17a, 17b.

An inner magnet 23 is fixed to the top of the shaft 15 of the in-boo 92 by a bolt 21. Therefore, the inner magnet 23 is integrally supported on the turbine propeller 13 side], 'I
The turbine propeller 13 and II) are constructed in the form of a single core.

On the other hand, a fan 7 and a propeller 2 are disposed outside the heat pipe 5.
5 is provided, and this wing bellows 25 is supported by an outer wing shaft 27. This outer π shaft 27 is arranged concentrically with respect to the inner blade shaft 15, has a hollow part 27a at the shaft center for weight reduction, and has a first outer bearing 29a at the top of the bearing socket 19. It is rotatably supported via a 27th outer support 29b. A collar 31 is interposed between the inner races of the first outer bearing 29a and the twenty-seventh outer bearing 29b, and the upper surface of the inner race of the first outer bearing 29a is connected to the bearing socket 1.
The cover fixed to 9 with bolts 33 is held down by a stop plate 35.

The inch magnet 2 is attached to the lower end of the outer shaft 27.
A skirt portion 217b extending to the outer periphery of No. 3 in the rotational direction is formed. An outer region moxibustion stone 37, which is disposed outside the bearing socket 19 and around the outer circumference of the inner magnet 23 in the rotational direction, is supported on this Nuka-1 part 27b. Therefore, the outer magnet 37 is integrally supported by the rubber roller 25, is arranged around the outer periphery of the inner 11UJ23 in the rotational direction, and is magnetically coupled to the inner 16 stone 23. The J3 electronic device 1 is covered by a cover 39 fixed to the circuit L1 board 3.

Next, the operation of the above embodiment will be described.

When the electronic cord 1 generates heat, the refrigerant 11 in contact with the circuit board 3 absorbs heat and evaporates. The evaporation of the refrigerant 11 forms an evaporation flow within the evaporation chamber 9, and the turbine propeller 13 is rotated. As the turbine propeller 13 rotates, the inner 1
One stone 23 is rotated concentrically with the turbine propeller 13. In this way, as the inner 141 stone 23 rotates, the outer magnet 37, which is magnetically coupled to the inner 141 stone 23 outside the bearing socket 19, also receives rotational force. The rotational force of the outer magnet 37 is transmitted to the fan propeller 25 via the outer hip shaft 27, and the fan propeller 25
is rotated around its axis. The rotation of the fan propeller 25 generates a wind for cooling the heat pipe 5, thereby cooling the outer wall surface of the heat pipe 5. When the outer wall surface of the heat pipe 5 is forcedly cooled 7, II in this way, heat radiation from the pipe 5 is promoted, and heat is efficiently radiated from the steam in the evaporation chamber 9 to the outside via the heat pipe 5. Thus, the electronic cable 1 can be cooled effectively. The vapor flow that has been heat radiated as described above above the evaporation chamber 9 is condensed and liquefied, and is dripped to the bottom side of the evaporation chamber 9.

On the other hand, when the heat generation of the electronic element 1 increases, the evaporation of the refrigerant 11 is promoted accordingly. Therefore, the rotation of the fan propeller 25 becomes faster, and the fan propeller 25 becomes stronger for cooling depending on the magnitude of heat generation. Also electronic cable 1
When the heat generation of the refrigerant 11 is so high, the evaporation of the refrigerant 11 is also reduced, and accordingly, the cooling by the fan propeller 25 is weakly generated.

Therefore, depending on the heat generating body of the electronic element 7, the cooling JJ' is automatically performed.
Adjustment of I output is performed. Even when the electronic cord 1 is locally heated, the refrigerant 11 emits W-^ in response to this, and 14
There is no problem with local heating and cooling. In addition, especially in the embodiment of the present invention, since the outer magnet 37 is distributed around the outer circumference of the inner magnet 23 in the rotational direction, the inner magnet 23
The force of attraction between the three outer magnets 37 does not act on the first inner bearing 17a, the second inner bearing 17b1, the first outer bearing 29a, and the twenty-seventh outer bearing 29b. Therefore, when compared with the proposal of J in FIG.
7. If the attracting force acts on the inner bearing 121 and the outer bearing 129 as an unreasonable force in the axial direction, and the evaporation flow causes the turbine propeller 123 and the connected OJ fan propeller 131 to rotate, there will be a large resistance. There was a fear that the improvement in heat dissipation efficiency would be inhibited.

On the other hand, in the embodiment of the present invention, as described above, the turbine propeller 13 and the fan propeller 25 are prevented from being subjected to excessive force on each of the bearings 17a, 17b, 29a, and 29b.
It is possible to achieve a smooth rotation of 1:1 and a dramatic increase in heat dissipation efficiency.Figure 2 shows another embodiment of the present invention. Shizuka 9+ inside room 9!
41 was established.

Therefore, in this case, the evaporated flow of the refrigerant 11 is rectified by the static space 41 in the direction in which the turbine propeller 13 efficiently rotates, thereby increasing the rotational efficiency of the turbine propeller 13 and further improving the heat dissipation efficiency.

Note that this invention is not limited to the above embodiments.
For example, heat dissipation fins are provided on the outer surface of the heat pipe 5 ().
You can also do that.

[Effects of the Invention] As is clear from the above, according to the configuration of the present invention, the thermal resistance during heat radiation is lower than that of the conventional example, and the heat can be efficiently radiated, and the b Heat can be dissipated without any problem.

Moreover, forced cooling without the need for an external drive source/, II
', and the fan propeller is automatically rotated +11111211 according to the degree of heat generation without the need for a control device, making it possible to improve heat dissipation efficiency from 4K while suppressing cost increases. Furthermore, in response to the previous proposal developed by the present applicant, the attractive force between the inner magnet and the outer magnet is less likely to act as an unreasonable force on the bearing that supports the turbine propeller and the turbine propeller. It is possible to further improve heat dissipation efficiency.

[Brief explanation of the drawing]

Fig. 1 is an overall sectional view of one embodiment of the present invention, Fig. 2 is an overall sectional view of another embodiment of the invention, Figs.
The figure is an overall cross-sectional view of the conventional example, and FIG. 5 is a cross-sectional view of all 17 according to the previous proposal. 1... Electronic element (heating element) 3... Circuit board (photothermal element) 5... Heat pipe 9... Evaporation γ11...
Refrigerant 13... Turbine propeller 23...
・Inner-11 stone 25...F1 block bella 37
...Outer magnet Figure 1 Figure 2 Blade 1 -1:3 b+ In'+

Claims (1)

[Claims] a container-shaped heat pipe that is attached to the heating element and partitions an evaporation chamber; a refrigerant that is housed inside the evaporation chamber and absorbs heat from the heating element and evaporates; and a refrigerant that is rotatably supported inside the evaporation chamber and evaporates the refrigerant. A turbine propeller that is rotated by the flow, an inner magnet that is integrally supported on the turbine propeller side and is concentric with the turbine propeller, and a fan that is rotatably supported on the outside of the heat pipe and generates air to cool the heat pipe by rotation. A heat dissipation system comprising a propeller and an outer magnet that is integrally supported on the side of the fan propeller, is disposed around the outer periphery of the inner magnet in the rotational direction, and is magnetically coupled to the inner magnet.