TWI600873B - One-way circulation starting structure for oscillatory heat dissipation device - Google Patents

Description

One-way circulation starting structure of oscillating heat conduction device

The invention relates to a heat conducting device; in particular to an innovative type of unidirectional cyclic starting structure of an oscillating heat conducting device.

According to the heat transfer device such as a heat pipe or a hot plate, since it has good heat transfer performance, it has been widely used as a heat dissipation structure of various electronic products in recent years, and particularly in a computer structure, most of the heat pipe configurations are visible.

In view of the problems and shortcomings of the traditional heat pipe structure, the related industry has developed an oscillating heat pipe without a capillary structure. The overall structure of the oscillating heat pipe is quite simple, and it is usually formed by a smooth thin tube. And the driving force is the capillary force generated by the smaller pipe diameter, the gravity of the working liquid and the bubble pressure generated by the heat, so that the heat pipe generates an action, and the oscillating heat pipe internal filling accounts for the total cavity. The working fluid has a volume of 40%~80%, and the chamber exhibits a negative pressure state, so that when a part of the cavity is heated, the working fluid evaporates to form a vapor pressure to promote the flow of the working fluid, thereby forming a cyclically oscillating state.

However, the traditional oscillating heat pipe has found in its experience that the starting force of the internal working fluid to generate the circulating action is still quite limited, because the conventional oscillating heat pipe structure type design usually generates the pressure difference through the difference of the size of the pipe diameter to The purpose of unidirectionally starting the gas circulation is achieved. However, in the conventional experience, it is found that the working fluid corresponding to the heat source inside the heat pipe is initially heated by vaporization to generate thrust, because of its passage to the large pipe diameter. The working fluid with small diameters is in a smooth flow state, so it is often necessary to achieve an average of the pressures in the two flow directions at one junction and it is impossible to achieve or it is difficult to achieve the purpose of starting the one-way circulation of the working fluid. Then think about the important technical issues of breakthrough.

Therefore, in view of the problems of the above-mentioned conventional oscillating heat conduction structure, the inventor has been engaged in the manufacturing development and design experience of related products for many years, and after the detailed design and careful evaluation of the above objectives, it is finally practical. The invention of sex.

The main object of the present invention is to provide a unidirectional cyclic starting structure of an oscillating heat conducting device, and the technical problem to be solved is to aim at how to develop a new oscillating heat conducting device structure with more ideal practicability. Think about innovation breakthroughs.

The technical feature of the present invention is mainly that the oscillating heat conduction device comprises a casing and a loop-type flow passage disposed inside the casing, the loop-type flow passage including a heated section, a first side diversion section and a second side flow guiding section, wherein the circuit type flow channel is provided with a working fluid, and the working fluid of the heated section is evaporated to form a vapor pressure to push the working fluid to flow; and at least one side of the second side flow guiding section is provided There is at least one forked choke that protrudes toward the side and has a blind hole shape, and a forked edge portion is formed between the forked choke and the second side flow guiding section, and the edge of the inverted fork is convex The direction of extension is opposite to the direction of steam movement from the heated section.

The main effects and advantages of the present invention are mainly that the forked choke can be used to block the working fluid moving from the heated section toward the second side flow guiding section, and relatively promote the diversion from the heated section toward the first side. The working fluid flow state of the section moving, thereby achieving the practical progress of accelerating the one-way circulation starting state of the working fluid inside the oscillating heat conduction device.

Referring to Figures 1, 2, 3 and 4, there is shown a preferred embodiment of the unidirectional cyclic starting structure of the oscillating heat conducting device of the present invention, but the embodiments are for illustrative purposes only and are not used in patent applications. The oscillating heat conduction device A includes a casing 10 and a circuit-type flow passage 20 disposed inside the casing 10. The circuit-type flow passage 20 includes a heat-receiving section 23, a first a side flow guiding section 21 and a second side flow guiding section 22, and the circuit type flow channel 20 is provided with a working fluid 30, and the working fluid 30 of the heated section 23 is evaporated to form a vapor pressure to push the working fluid. 30 flows; and wherein at least one side of the second side flow guiding section 22 is provided with at least one forked flow path 40 protruding toward the side side in a blind hole type, the forked flow path 40 and the A branching edge portion 41 is formed between the two side flow guiding sections 22, and the protruding direction of the falling edge portion 41 is in the moving direction of the working fluid 30 from the heated section 23 (such as the arrow of FIG. 2) W1) is reversed.

The actual operational state of the oscillating heat conduction device A of the present invention is first shown in FIG. 2, and the heated portion 23 of the circuit-type flow channel 20 is provided in contact with one. An existing heat source 50, the forked flow path 40 can be used to block the working fluid 30 moving from the heated section 23 toward the second side flow guiding section 22 (as indicated by arrow W2), and relatively promoted The working fluid 30 (shown by arrow W1) moving from the heated section 23 toward the first side flow guiding section 21 is in a flowing state, thereby accelerating the internal working fluid 30 of the oscillating heat conducting device A as shown in FIG. The achievement of the cycle start state (as shown by the arrow W1 shown in Fig. 3). It should be added in this paragraph that the forked choke 40 can block the working fluid 30 moving from the heated section 23 toward the second side flow guiding section 22, mainly because the working fluid 30 When moving to the forked choke 40, the blind hole pattern of the forked choke 40 is added to the direction in which the crotch edge 41 protrudes and the direction of the working fluid 30 from the heated section 23 (as shown in Fig. 2) The reversed type characteristic of the number W1 causes the passing working fluid 30 to reflow (as indicated by the arrow L1 in Fig. 2), and the reflow phenomenon can be made from the heated section 23 toward the second side. The working fluid 30 moved by the flow guiding section 22 generates a retarding action to lower the side pressure.

As shown in the first to fourth embodiments, the oscillating heat conduction device A can be set to a hot plate type, so that the housing 10 includes a substrate 101 and a cover plate 102 fixedly coupled to each other. The flow path 20 is provided on at least one of the substrate 101 and the cover plate 102 (note: this example is only provided on the structure of the substrate 101), and the forked flow path 40 is configured to be obliquely convex. state.

As shown in FIG. 7, the oscillating heat conduction device A2 can also be configured in a heat pipe type, so that the casing 10B is formed by bending a hollow tube into a loop type and including mating with each other. a first tube end 11 and a second tube end 12, and one of the first tube end 11 and the second tube end 12 is provided with a shape of a constricted tube wall 13 to form the forked choke 40B, and the inverted edge portion 41B is formed by the end of one of the first pipe end 11 and the second pipe end 12. The features disclosed in this example still have different variations in the specific implementation. As shown in FIG. 7, the first tube end 11 is formed with a constricted tube wall 13 and the second tube end 12 is a sleeve. Forming a straight wall shape on the outer circumference of the first pipe end 11 such that the forked choke 40B is formed between the constricted pipe wall 13 and the second pipe end 12; It is shown that the first pipe end 11C is set to a straight wall type, and the second pipe end 12C is sleeved at the outer periphery of the first pipe end 11C and the constricted pipe wall 13C is formed to make the forked choke. 40C is formed between the constricted tube wall 13C and the first tube end 11C.

The forked chokes 40, 40B can be formed in a symmetric configuration on both sides of the second side flow guiding section 22.

As shown in FIG. 5, the forked flow path 40 can also be formed on the two sides of the second side flow guiding section 22 in a mutually dislocated configuration.

The forked chute 40 as disclosed in FIG. 6 is an arrangement type formed only on one side of the second side flow guiding section 22.

Advantages of the Invention: The "unidirectional cyclic starting structure of the oscillating heat conducting device" disclosed by the present invention mainly adopts the innovative and unique structural type of the casing, the loop type flow passage, the forked choke, and the inverted fork edge. State and technical features, in contrast to the conventional structure proposed in [Prior Art], the forked choke can be used to block the working fluid moving from the heated section toward the second side diversion section, and Relatively promoting the flow state of the working fluid moving from the heated section toward the first side flow guiding section, thereby achieving the practical progress of accelerating the one-way circulating starting state of the working fluid inside the oscillating heat conducting device.

Oscillating heat conduction device A, A2 Housing 10, 10B Base plate 101 Cover plate 102 First pipe end 11, 11C Second pipe end 12, 12C Constricted pipe wall 13, 13C Circuit type flow passage 20 First side flow guiding section 21 second side diversion section 22 heated section 23 working fluid 30 forked choke 40, 40B, 40C inverted prong 41, 41B, 41C heat source 50

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exploded perspective view showing a preferred embodiment of the structure of the oscillating heat transfer device of the present invention. Fig. 2 is a schematic view showing the state of the internal steam one-way circulation of the oscillating heat conduction device of the present invention. Fig. 3 is a schematic view showing the state of the internal steam one-way circulation of the oscillating heat conduction device of the present invention. Figure 4 is a partial cross-sectional view showing a preferred embodiment of the structure of the oscillating heat transfer device of the present invention. Fig. 5 is a view showing another embodiment of the configuration of the forked chute of the present invention. Fig. 6 is a view showing still another embodiment of the fork-shaped choke arrangement type of the present invention. Fig. 7 is a view showing an embodiment in which the oscillating heat conduction device of the present invention is set in a heat pipe type. Fig. 8 is a view showing another embodiment of the oscillating heat conduction device of the present invention in a heat pipe type.

Oscillating heat transfer device A Housing 10 Base plate 101 Circuit type flow passage 20 First side flow guiding section 21 Second side flow guiding section 22 Heated section 23 Working fluid 30 Forked choke 40 Flanged edge 41 Heat Source 50

Claims (5)

A unidirectional cyclic starting structure of an oscillating heat conducting device, the oscillating heat conducting device comprising a casing and a loop type flow passage disposed inside the casing, the loop type flow passage including a heat receiving section, a first a side flow guiding section and a second side flow guiding section, wherein the circuit type flow channel is provided with a working fluid, and the working fluid of the heated section is evaporated to form a vapor pressure to promote the working fluid flow; and wherein the first At least one side of the two-side flow guiding section is provided with at least one forked choke that protrudes toward the side and has a blind hole shape, and a fork-shaped choke and a second side diversion section form a a forked edge portion, the protruding direction of the inverted fork portion is opposite to a moving direction of the working fluid from the heated portion; thereby, the forked choke is used to block the second section from the heated section The working fluid moved by the side flow guiding section relatively promotes the flow state of the working fluid moving from the heated section toward the first side guiding section, thereby accelerating the achievement of the one-way circulating starting state of the working fluid inside the oscillating heat conducting device. The unidirectional cyclic starting structure of the oscillating heat conducting device according to claim 1, wherein the oscillating heat conducting device is configured in a hot plate type, so that the housing comprises a substrate fixedly combined and a The cover plate is configured such that at least one of the substrate and the cover plate is disposed, and the forked choke is disposed in an obliquely convex configuration. The unidirectional cyclic starting structure of the oscillating heat conducting device according to claim 1, wherein the oscillating heat conducting device is configured in a heat pipe type, so that the casing is bent into a circuit by a hollow pipe. And a first tube end and a second tube end that are coupled to each other, and one of the first tube end and the second tube end is provided with a shape of a constricted tube wall to form the The forked flow path is formed by the end of one of the first tube end and the second tube end. The unidirectional cyclic starting structure of the oscillating heat conducting device of claim 2, wherein the inverted rim portion is formed in a symmetric configuration on both sides of the second side flow guiding section. The unidirectional cyclic starting structure of the oscillating heat conduction device of claim 2, wherein the inverted rim portion is formed on two sides of the second side flow guiding section in a mutually dislocated configuration.