JPS621588Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat conductive connector for mechanically connecting a heat pipe and a radiator to transfer heat.

When mechanically connecting a heat pipe, which is a heat transport medium, and a radiator in electronic equipment, etc., conventionally, as shown in FIG.
A male threaded part 2 is formed on the outer periphery, a female threaded part 4 is provided on the radiator 3, and the male threaded part 2 and the female threaded part 4 are screwed together by rotating the heat pipe 1 in the direction of the arrow. The heat sink 3 is connected to the condensing section 1a of the heat pipe 1 by welding, and in this connected state, the heat transported from the evaporating section 1b of the heat pipe 1 is is transmitted from the condensing section 1a to the radiator 3.

By the way, in order to efficiently cool the heat generating parts of electronic devices etc. using heat pipes, in addition to expanding the heat dissipation area or using the external atmosphere, the heat from the heat generating parts can be evaporated from the heat pipe. It is necessary to transmit heat to the heat pipe with as little heat loss as possible, and for this purpose, it is desirable to integrate the evaporating part and the heat generating part of the heat pipe or to fix them.

However, with the connection method shown in Figure 1 above, if the non-rotatable heat generating part and the evaporating part of the heat pipe are integrated or fixed, it becomes impossible to connect the heat pipe and the radiator, and even if the heat generating part Even if the heat pipe integrated with the heat pipe is rotatable, the heat generating part and the heat pipe must be rotated all at once, requiring a large space for connection. This goes against the trend toward miniaturization and high-density packaging, which are requirements for equipment design in recent years.In addition, it is very time-consuming to rotate the heat pipe each time it is connected or disconnected, and there is a problem with maintainability and compatibility. This results in the disadvantage that it is inferior to .

Furthermore, with the connection method shown in Figure 2, it takes time and effort to weld the radiator directly to the heat pipe, and it also requires a large amount of mounting space because it is not compatible and the radiator cannot be shared. In addition, when heat is dissipated using a radiator outside the device in order to increase cooling efficiency, there are drawbacks such as the difficulty in constructing a hermetically sealed structure for the device.

In addition, heat pipes are made from a thin copper tube base material, so the condensing part of the heat pipe is threaded or a separate member is welded to provide a male threaded part as shown in Figure 1. In addition, as shown in Figure 2, processing such as welding the heat sink is difficult, and at the same time, cheap mass-produced heat pipes cannot be used, making them expensive, and it takes a long time to deliver the heat pipes. It also had the disadvantage of being expensive.

Furthermore, in recent years, electronic devices, etc., which require even higher density packaging, have a high heat generation density inside the device, so the conventional method of dissipating heat inside the device cannot provide a sufficient cooling effect. Moreover, there was also the problem that cooling fins and the like provided inside the device hindered miniaturization.

The present invention is intended to solve these drawbacks, and allows the connection between the condensing part of the heat pipe and the radiator to be made quickly and easily in good thermal and mechanical conditions, and is easy to manufacture. The purpose is to obtain a thermally conductive connector that is compatible with the radiator, and for this purpose, thermally conductive grease is placed inside the connector container, which has a male threaded part at one end that can be screwed onto the female threaded part of the radiator, and an opening at the other end. At the same time, a thermally conductive elastic body provided with a through hole having an air escape portion is attached to the inside of the opening, and a cap having a guide hole is attached to the outside of the opening to improve the heat conduction. The present invention is characterized in that grease is sealed and held within the connector, and in this state, the condensing part of the heat pipe is inserted into the connector container through the guide hole of the cap and the through hole of the elastic body.

To explain the following with reference to the drawings, FIG. 3 is a cross-sectional view showing one embodiment of the present invention, and FIG. 4 is a perspective view showing the heat conductive connector in FIG. 3 with the cap removed. A pipe, 3 is a radiator, 4 is a female threaded part provided on the radiator 3, and 5 is a heat conductive connector, and this heat conductive connector 5 has one end as a closing surface and a central part corresponding to the female thread part 4. A connector container 8 having a protruding male threaded portion 6 and an opening at the other end and a stepped portion 7 inside the connector container 8, thermally conductive grease 9, and a through hole 11 having an air escape portion 10. elastic body 12
and a cap 14 having a tapered guide hole 13 in the center.

Incidentally, the connector container 8 having the male threaded portion 4
is formed of a metal with good thermal conductivity such as copper, aluminum, etc., and then processed so that the diameter near the opening is larger than the diameter at the back to form a stepped portion 7, and further as necessary. Perform deburring, surface polishing, etc. as required. On the other hand, the elastic body 12 can be formed by standing a molded rod with a gear-shaped cross section in a predetermined mold, pouring liquid heat conductive rubber or the like into the mold, and heating and hardening it. When the elastic body 12 is taken out from the mold after hardening and the molded rod is pulled out, a guide hole 11 having the same cross-sectional shape as the molded rod is obtained in the center of the elastic body 12, which corresponds to the gear-shaped teeth. This part is defined as an air escape part 10.

Here, to explain the assembly of the heat conductive connector 5, first, the connector container 8 formed as described above is
The inside is filled with thermally conductive grease 9, and then the elastic body 12 is fitted inside the opening of the connector container 8 in order to seal and hold the thermally conductive grease 9 inside the connector container 8. Further, a cap 14 is attached to the outside of this opening, and an elastic body 12 is fixed between this cap 14 and the stepped portion 7 inside the connector container 8. The cap 14 may be attached to the connector container 8 by screwing or other suitable fixing means.

Next, the operation of the heat conductive connector 5 having the above-described configuration will be explained. First, the male threaded part 6 of the connector container 8 is screwed and fastened to the female threaded part 4 of the radiator 3, and the heat conductive connector 5 is connected to the radiator 3. After that, the condensing part 1a of the heat pipe 1 is inserted into the connector container 8 through the guide hole 13 of the cap 14 and the through hole 11 of the elastic body 12 as shown by the arrow. During this insertion, the heat pipe 1 is smoothly guided into the connector container 8 because the guide hole 13 has a tapered shape. Since the heat pipe 1 is ejected from the heat pipe 1, the heat pipe 1 can be smoothly inserted.Furthermore, after the heat pipe 1 is inserted, the heat pipe 1 can be firmly and closely held by the elastic body 12.

By inserting the condensing part 1a of the heat pipe 1 into the connector container 8 in this way, the heat pipe 1 and the radiator 3 are connected, and in this connected state, the condensing part 1
The heat transported to a is transferred to the thermally conductive elastic body 12
At the same time, the heat is transmitted to the connector container 8 through the heat conductive grease 9, which adheres well to the slightest gaps between the heat pipe 1 and the connector container 8, and is further efficiently transferred from the connector container 8 to the heat sink 3. heat is transferred and dissipated.

To disconnect the heat pipe 1 and the heat sink 3, it is sufficient to pull the heat pipe 1 in the opposite direction to the insertion direction and remove it from the heat conduction connector 5. The thermally conductive grease 9 is separated from the heat pipe 1 by the body 12 .

According to the present invention described above, the heat pipe can be connected and disconnected from the heat sink by moving it linearly, that is, by inserting it into the heat conduction connector and pulling it out, so it does not require a large space unlike the conventional method. Also, by replacing the elastic body, it can be applied to heat pipes of different diameters, so it has the advantage of excellent compatibility.

In addition, by using the heat conductive connector of the present invention, it is possible to easily and quickly connect the heat pipe to the heat sink while it is movable, resulting in excellent maintainability. Objects can be efficiently cooled with a radiator outside the device, and the radiator can also be shared, which has the effect of making the device more compact.

Furthermore, the thermally conductive connector according to the present invention has the advantage that the thermal conductivity can be changed as necessary by mixing a substance with good thermal conductivity such as silver powder into the thermally conductive grease.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional example, Fig. 2 is a sectional view showing another conventional example, Fig. 3 is a sectional view showing an embodiment of the present invention, and Fig. 4 is a heat conductive connector in Fig. 3. FIG. 3 is a perspective view showing the state with the cap removed. 1... Heat pipe, 1a... Condensing section, 1b...
...Evaporation part, 3...Radiator, 4...Female screw part, 5...
...Thermal conductive connector, 6...Male thread part, 7...Step part, 8...Connector container, 9...Thermal conductive grease,
10... Air escape portion, 11... Through hole, 12... Elastic body, 13... Guide hole, 14... Cap.

Claims (1)

[Scope of utility model registration request] Thermal conductive grease is filled in a connector container that has a male threaded part that is screwed into a female threaded part provided on the radiator and has an opening at the other end, and a transparent material that has an air escape part inside the opening. A thermally conductive elastic body with a hole in the center is attached, and a cap with a guide hole in the center is attached to the outside of the opening to seal and hold the thermally conductive grease inside the connector. A heat conductive connector characterized in that a heat pipe is inserted into the connector through a hole and a through hole.