JPH09329396A - Composite type plate heat pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform operation even at low heat input and high heat input and further to reduce posture dependency by a method wherein a composite plate heat pipe is constituted as a thin type plate heat pipe having first and second constituting elements integrally formed by itself and operated in a manner to be mutually complemented on a whole. SOLUTION: A first constituting element is comprised by a zigzagging fine tunnel heat pipe 1 formed such that a tunnel space formed in the plate of a plate metallic plate 1-1 through emboss 1-2 having a zigzagging fine pattern is sealed with given working liquid. A second constituting element is comprises by a non-zigzagging fine tunnel heat pipe group 2 in a semicircular shape in cross section forming a wedge-form protrusion space 2-5 is partially coupled to form a space, and the space is filled with given working liquid. The straight pipe parts of the fine tunnel heat pipes of the first and second constituting elements are arranged in a state to alternately and closely approach each other and compositely integrally formed. Two kinds of built-in heat pipes are mutually complemented to provide respective excellent performance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a plate heat pipe, and more particularly to a meandering thin film having heat transfer by sensible heat of working fluid (heat transfer by vibration and / or circulation of working fluid) as a main heat transport principle. It consists of a plate heat pipe consisting of large diameter tunnel heat pipes, and a group of non-serpentine small diameter tunnel heat pipes whose main heat transport principle is heat transfer by latent heat of the working liquid (heat transfer by evaporation and condensation when the working liquid moves in vapor). The present invention relates to a composite plate heat pipe having a basic structure of a structure in which a heat pipe is integrated and they complement each other to operate.

[0002]

2. Description of the Related Art In spite of the recent progress in semiconductor devices and the accompanying advance in device mounting technology, semiconductor devices have increased in capacity and device mounting has been increasing in density.
In the industry, there is a strong demand for miniaturization and weight reduction of equipment housings.In addition, measures against the heat generated by the increased heat generation of the semiconductor element group in the miniaturized housing, and partial measures inside the housing due to the increased capacity of the semiconductor element group A major problem to be solved is how to deal with a rise in temperature. As a means of solving these problems, heat transport using a thin and lightweight plate heat pipe,
Attention has been paid to temperature diffusion and temperature uniformity, and it has begun to be widely used.

[0003] There are various types of plate heat pipes having various structures, but most of them are too large in shape, excessive in weight, or sufficiently resistant to the saturated vapor pressure of the working fluid when the temperature rises. Can not be used or has various problems.
Alternatively, plate heat pipes expected to be put into practical use are almost limited to the following three types. (1) The first of them is an application of Japanese Patent No. 1967738 (loop type thin pipe heat pipe) which the present inventor has put into practical use. A long meandering thin tunnel heat pipe is built in a thin metal plate. It is a thin and lightweight plate heat pipe constructed. (2) The second of them is a plate heat pipe constituted by sandwiching a plurality of small-diameter heat pipes, which are commonly known as micro heat pipes, between thin metal plates in parallel. (3) The third of these is a micro heat pipe formed by incorporating a group of ultra-fine diameter tunnel heat pipes into a thin plate as a plate heat pipe, which has received a lot of attention but has not been put to practical use. Each tunnel of a normal micro heat pipe has a square cross-section, and its corners have an acute groove shape. Even if the acute groove functions as a wick, even if it has an extremely small diameter of 1 mm or less. It has become popular to operate as a heat pipe.

[0004] These three types of heat pipes have their respective advantages and disadvantages, and are properly used depending on the application. The features of each of them are as follows. The meandering small-diameter tunnel heat pipe built in the plate heat pipe of (1) has a heat transfer principle that is heat transfer by sensible heat of the working liquid (heat transfer by vibration and / or circulation of the working liquid). Then, due to the surface tension of the hydraulic fluid in the small diameter tunnel, the hydraulic fluid always moves to fill and occlude the tunnel, and this hydraulic fluid causes nucleate boiling of the hydraulic fluid which is intermittently generated in the heat receiving part. The pressure wave causes it to oscillate or circulate axially in the tunnel. This vibration and circulation transport heat from the high temperature side to the low temperature side with high efficiency. Details of this principle are as described in Japanese Patent No. 1967738. The equivalent diameter range of the small-diameter tunnel to which such operating principle is applied is approximately 5 mm or less in the case where the holding posture during operation of the heat pipe is the bottom heat mode (mode where the heat receiving part position is low water level), and in other modes It is 4 mm or less. The minimum limit of diameter reduction is limited to the manufacturable range.

Since the operating principle of this heat pipe is due to axial vibration and / or circulation of the hydraulic fluid caused by the high-pressure pressure wave generated by nucleate boiling of the hydraulic fluid in the small-diameter tunnel, its performance is improved. The feature is that there is little gravity dependence of. Therefore, it is a great advantage to operate in the top heat mode with little change in performance due to the holding posture during operation. In the meandering small-diameter tunnel heat pipe, each straight pipe part of a continuous tunnel always operates by complementing each other, and the number of turns increases, and as the number of straight pipe parts increases, the effect of mutual complementation increases. There is a feature that performance is greatly improved beyond the rate of increase in number. Since the heat transfer is due to axial vibration of the working fluid and / or circulation, the enthalpy is large, so the maximum heat transfer capacity is large, and if the effect of increasing the number of turns is added, a large capacity heat transfer of several KW is achieved. The easy point is a great feature. One of the features of this type of plate heat pipe is that it has good secondary workability and can be freely bent and used.

[0006] Since the thin tube heat pipe sandwiched in the plate heat pipe of (2) is a normal heat pipe, heat transport mainly by latent heat of the hydraulic fluid (heat transport by evaporation and condensation of the hydraulic fluid) is mainly performed. The transport principle. Therefore, it has all the features of a normal heat pipe. In other words, it has relatively high performance as a thin tube heat pipe, operates with high sensitivity even with relatively small heat input, and has good thermal response even when the temperature difference between the heat receiving part temperature and the heat radiating part temperature is relatively small. Operate. Also, the temperature uniformity performance over the length of the heat pipe is extremely good.

[0007] The multi-parallel tunnel heat pipes formed in the plate heat pipe (3) are all micro heat pipes, and are conventional heat pipes having an equivalent diameter of 0.5 mm or less. Therefore, the size of the plate heat pipe formed is very small with a plate thickness of about 1.2 mm, an area of about 10 mm × 20 mm or less, and a small heat transfer capacity of 10 W or less. In the area range, it is characterized by extremely good heat diffusion performance, temperature uniformity performance, and thermal responsiveness. Further, since the area is small, there is almost no influence of the holding posture due to heat diffusion due to heat conduction between metals, and there is no posture dependency.

[0008]

As described above, the plate heat pipes have excellent functions, but each has various problems, and the plate heat pipes are used for different purposes. However, the functions required by users are extremely widespread, and it is strongly desired to solve the problems in each of them. The problems of each are as follows.

Since the plate heat pipe incorporating the meandering small-diameter tunnel of (1) is an application of the meandering thin tube heat pipe technology, it has excellent features and has the following problems. Since the heat transfer is due to vibration and circulation of the working fluid in which a liquid phase and a gas phase are mixedly arranged in the tunnel, energy is consumed to generate vibration and circulation, and the pressure loss in the pipe is relatively large. , The thermal response of the conventional heat pipe is lower than that of vapor transfer heat transport.
The activity of the operation at a low heat input such as several W decreases, and when the temperature difference between the heat receiving portion and the heat radiating portion is as small as 10 ° C. or less, the thermal resistance value increases.

The conventional type thin plate heat pipe sandwiching type (2) has poor secondary workability and is extremely difficult to bend and use. In addition, the performance changes greatly depending on the holding posture, and it does not work in the top heat mode, so it cannot be used depending on the applicable device. Further, since a dry-out phenomenon, which is a drawback of a conventional heat pipe, occurs, it may not be usable in the case of large heat input and shock rapid heat input.

Since the micro heat pipe (3) is extremely small, it cannot be used for general purposes because the heat flux far exceeds the limit heat flux even with a heat input of about several tens of watts. Further, the small size allows a large amount of heat conduction between metals and greatly reduces the dependence of the performance on the holding posture. However, the performance changes due to the holding posture are relatively large, and practical use other than for special purposes is difficult.

As described above, all of the conventional plate heat pipes that have been put into practical use have advantages and disadvantages, and it is necessary to separately use them according to their uses. As a request from users, there is a demand for a plate heat pipe that can be shared for any use. In addition, depending on the application, there are many cases where a function having the performance of two types of plate heat pipes is required, and development of a plate heat pipe having a wide range of application is desired. In order to meet such a demand, the present invention works well even with a small temperature difference and low heat input like a conventional heat pipe, and can also have a large heat input like a meandering small diameter heat pipe, and has less attitude dependency Provide plate heat pipe.

[0013]

1 to 6, the basic structure of a plate heat pipe constituted by means for solving the problems of the present invention and the procedure of the constitution will be described. The composite plate heat pipe of the present invention has a meandering small diameter tunnel heat pipe as the first component and a conventional small diameter tunnel heat pipe group as the second component, both of which are built in a single plate. , The straight pipe portions of the small-diameter tunnel heat pipes of the first and second constituents are alternately and densely arranged in close proximity to each other to be compositely integrated. The heat pipes complement each other to become plate heat pipes that have their excellent performance.

FIG. 1 is a side sectional view for explaining the basic structure of the composite plate heat pipe of the present invention and the first and second embodiments. A predetermined working fluid is enclosed in a tunnel space formed by an embossing 1-2 of a meandering small diameter pattern formed by a thin metal plate having a high spreadability on the plane of the flat metal plate 1-1, and a predetermined meandering diameter is obtained. A tunnel heat pipe 1 is constructed. The cross-sectional shape of the tunnel is naturally formed in a semi-circular cross-sectional shape whose corners form the wedge-shaped projection space 1-5. The plate heat pipe is used as a first component, and the flat metal plate 2-1 is arranged along the plane formed by the embossed tops of the first component.
Is covered and joined, and the flat metal plate 2−
The outer peripheral edge leaving a slight gap on the outer periphery of the meandering pattern embossing of No. 1 is airtightly joined to the outer peripheral edge of the first component, and by this joining, the inner plane of the metal plate 2-1 and the meandering thin diameter. Pattern embossing (flat metal plate)
A space is formed between the outer surface of 1-2 and a group of non-serpentine tunnel spaces each having a semicircular cross section whose corners naturally form a wedge-shaped projection space 2-5, and a predetermined space is formed in this space. The non-meandering small-diameter tunnel heat pipe group 2 is configured by encapsulating and sealing the working fluid of (3), and this plate heat pipe is used as a second component. The first and second constituent elements are integrated as a common container wall with embossed (flat metal plate) 1-2 having a meandering small-diameter pattern to form a composite plate heat pipe of the present invention.

FIG. 2 shows another structural example of the basic structure of the composite plate heat pipe of the present invention. 1 shows an example in which the first component has a meandering thin pattern emboss with a semicircular cross section formed on one side of a flat metal plate, but in FIG. 2, the meandering thin diameter of the first component is shown. The pattern embossing is the flat metal plate 1 of FIG.
1 and 1-2 are both expanded and embossed, and the embossments are formed on both sides of the flat metal plates 1-1 and 1-2 of FIG. 3, and the meandering small-diameter tunnel heat pipe 1 constituted by the embossed space is formed. Cross section is wedge-shaped protrusion space 1 on both sides
It has an elliptical shape with -5. Therefore, the planes formed by the embossed tops are formed on both sides, and the flat metal plates to be covered and bonded are two sheets 2-1 and 2-2. Therefore, two flat surfaces of the small-diameter tunnel heat pipe group 2 formed by these flat metal plates and the space formed by the embossed surface are formed. That is, the number of second component plate heat pipes integrated with the first component plate heat pipe is two, with the first component sandwiched.

3, 4, and 5 are explanatory views of the manufacturing process of the first component. FIG. 3 is a side sectional view of the bonded laminated plate for molding the first component, and FIG. 4 is a plan view of a partial section thereof. Reference numerals 1-1 and 1-2 are flat metal plates, which are bonded and laminated to each other with the non-bonded portions 1-3 of a predetermined pattern left. When this joint is formed in a single-sided embossed shape as shown in FIG. 1, the metal plate 1-2 is made of a material that is more flexible and flexible than that of 1-1, or a material that is both flexible and flexible. Use 1-2
Is compared with 1-1 and a thin plate is used in either state. In the figure, the meandering pattern non-joint portion 1-3 is left as a non-joint portion in the meandering pattern as shown by the broken line in the plan view of FIG. For the formation of the non-joined portion, application of a joining inhibitor or other various joining preventing means is applied. As shown in FIG. 2, when embossing is performed on both surfaces of the bonded laminated plate, that is, when the first constituent element is sandwiched between two second constituent elements, the laminated plate is formed. The condition and thickness of the materials of the plates Nos. 1 and 1-2 are determined so as to give the same spreadability.

FIG. 5 shows a state in which the meandering pattern non-joint portion 1-3 of FIGS. 3 and 4 is expanded and expanded by press-fitting a high-pressure fluid. The metal plate 1-1 on the tough side is formed in a meandering embossing while keeping the flat plate state, and forms a meandering tunnel space 1-4. Its cross-sectional shape is semicircular, and wedge-shaped projection spaces 1-5 are naturally formed at both ends. By enclosing and sealing a predetermined two-phase condensable hydraulic fluid in the meandering tunnel space 1-4, the meandering thin tunnel heat pipe 1 in FIG. 1 is configured. Since the meandering tunnel space 1-4 has an equivalent diameter of 5 mm or less, the meandering small diameter tunnel heat pipe 1 is guaranteed to have good performance as a meandering thin tube heat pipe.
When a larger equivalent diameter is applied, it becomes impossible for the working fluid to constantly fill the inside of the tube due to its surface tension, which makes it impossible to operate as a meandering thin tube heat pipe.

The first constituent element of the present invention is constructed as described above, and the meandering pitch of the meandering tunnel spaces 1-4 in this case is formed to be about 20 mm or less. This 20 mm is the maximum pitch for suppressing the equivalent diameter of the meandering tunnel space 1-4 to 5 mm or less, and forming the wedge-shaped projection spaces 1-5 on both sides to expand and expand the pipe. It is desirable to be small, and if possible, it is desirable to be 10 mm or less. This is an important feature of the present invention, whereby the groove width formed between the pitches of the meandering embossing 1-2 is reduced, and the equivalent diameter of the small-diameter tunnel space of the second component is also reduced. Can be suppressed to.

FIG. 6 is a partially enlarged sectional view of the side surface of the composite plate heat pipe of the present invention. A flat metal plate 2-1 is joined along the plane formed by the tops of the embossings formed as shown in the first component of FIG. Although not shown, the peripheral edge of the flat metal plate 2-1 is hermetically joined to the peripheral edge of the first component. As a result, a space in which the non-meandering small-diameter tunnel space group 2-4 is partially connected is naturally formed between the pitches of the meandering embossing 1-2 of the first component, and the two-phase condensable hydraulic fluid is formed in this space. The second non-serpentine small diameter tunnel heat pipe group 2 in FIG.
Is formed. The cross-sectional shape of the small-diameter tunnel space 2-4 is semi-circular, and a wedge-shaped projection space 2-5 is formed at its corner, and a meniscus of the working fluid is formed in this portion to utilize the latent heat of the working fluid vapor. Acts as a heat pipe wick.

[0020]

In the composite plate heat pipe of the present invention as described above, the first constituent element exhibits various performances peculiar to the meandering thin tube heat pipe, and the unexplained place is the normal heat pipe of the second constituent element. By complementing the performance of the above, the function unique to the composite plate heat pipe of the present invention is exhibited.
Its unique functions are as follows, and comprehensively exhibit various performances that were impossible with conventional plate heat pipes.

(1) The composite type plate heat pipe of the present invention is capable of transporting the amount of heat with high performance even when the temperature difference between the heat source and the heat radiating portion is small. The temperature difference between the heat receiving part temperature and the heat radiating part temperature is essential for the operation of the heat pipe. Although there is a difference depending on the scale of the heat pipe, there is a minimum temperature difference for the operation corresponding to the scale. In the case of a heat pipe having an applied temperature of 100 ° C. or less and a heat transport amount of several hundred watts, since the meandering small-diameter tunnel heat pipe of the first component is heat transport by axial vibration and circulation of the working fluid, A minimum temperature difference of about 15 to 20 ° C is required at the time of start-up in order to generate appropriate vibration and circulation of the working fluid for efficient heat transfer, and a decrease in performance cannot be avoided below that. . This is a performance deterioration due to the pressure loss of the hydraulic fluid in the narrow tube.

However, the second component is an ordinary heat pipe, which is a heat pipe in which heat is transferred by latent heat of vaporization and condensation of the working liquid vapor moving from the high temperature portion to the low temperature portion, and the pressure loss during vapor movement. Is an order of magnitude smaller than the pressure loss during liquid transfer. Therefore, the temperature difference required during operation is 1
C. is sufficient and the second component heat pipe can start and continue to operate with a very small temperature difference.

Another problem peculiar to the meandering capillary tube heat pipe is that the first component has a large increase in pressure loss due to liquid movement in the meandering turn portion. Although this pressure loss is relatively large and varies depending on the operating conditions, according to experiments, by heating the meandering turn portion and canceling the pressure loss at that portion, the total thermal resistance value of the meandering thin-tube heat pipe is reduced by 1 /. In some cases, it decreased to 2.

Once the second component heat pipe starts to operate, the first component hydraulic fluid is heated and activated by this operation, and the kinematic viscosity coefficient sharply decreases due to the increase in liquid temperature, which causes The total pressure loss of the meandering thin pipe human pipe including the pressure loss of the meandering turn portion is reduced, and the heat pipe of the first constituent element also actively operates with a small temperature difference. That is, the composite plate heat pipe of the present invention is a high-performance heat pipe that is activated by the operation of the second component and actively operates even with a small temperature difference,
It offers high performance that was previously unattainable.

(2) The composite plate heat pipe of the present invention is applied as a high-sensitivity plate heat pipe that sensitively operates over the entire range from a small heat input of several watts to a large heat input of several kilowatts. You can

In the case of a meandering small-diameter tunnel plate heat pipe that requires a large amount of heat transfer, the distance between the heat-receiving part and the heat-dissipating part of the built-in meandering small-diameter tunnel heat pipe inevitably becomes long, and the number of meandering turns is large. Will increase. Although the performance increase due to them is large, the pressure loss in the thin tube at that time also becomes large.

Further, in the meandering thin tube heat pipe, heat is transferred by vibrating and circulating the working fluid, so that the optimum amount of liquid sealed in the meandering thin tube container changes depending on the required heat transport amount. That is, the optimal amount of the working fluid sealed in the large-capacity plate heat pipe increases by itself. It is necessary to greatly increase the optimal sealed hydraulic fluid amount in response to the increased transport distance, the increased number of turns, and the like.

In order to apply the axial vibration and the circulating force to the working fluid, the minimum amount of heat for giving the energy necessary to operate or start the mass of the working fluid and the loss of the internal force of the pipe is required in order to apply the vibration. I need. Therefore, in order to operate the thin-tube heat pipe satisfactorily under the increased amount of the enclosed working fluid and the increased pressure loss as described above, the necessary minimum amount of heat must be increased accordingly. For example, in the case of a plate heat pipe incorporating a meandering small-diameter tunnel heat pipe that transports a heat quantity of 1 kW at a temperature difference of 40 ° C., the minimum heat input for operation or startup is about 50 W, so a relatively large heat input is required. I need.

In comparison with this, in the case of a normal heat pipe, heat transfer is due to the latent heat of evaporation and condensation of the working liquid vapor that moves from the heat receiving portion to the heat radiating portion, so the pressure loss during movement of the working liquid vapor is extremely high. Since it is small, the heat pipe operates reliably even if the heat input is as small as 5 W. Therefore, in the case of the composite type plate heat pipe of the present invention, even if it is configured as a large capacity heat pipe of 1 kW, 5 W
When a very small amount of heat is input as in the case above, only the second component plate heat pipe starts to operate first, which raises the temperature of the working fluid in the first component plate heat pipe, which triggers plate heat. The entire pipe is working. That is, the composite plate heat pipe of the present invention can be operated sensitively in a wide range from a small heat input to a large heat input.

(3) In the composite plate heat pipe of the present invention, different kinds of working fluids having different operating temperature ranges are filled in each of the first component plate heat pipe and the second component plate heat pipe, By complementing each other, it is possible to construct a special plate heat pipe having a wide operating temperature range or a low temperature operating range.

(4) The composite plate heat pipe of the present invention can be used as a plate heat pipe utilizing sensible heat due to axial vibration of the working fluid, and can be used as a plate heat pipe utilizing latent heat due to the phase change of the moving working fluid. Any type of heat pipe can be selectively applied by adjusting the amount of enclosed hydraulic fluid. That is, each of the meandering small-diameter tunnel space forming the first constituent element and the small-diameter tunnel space forming the second constituent element has an elliptical or semicircular cross-sectional shape having wedge-shaped projection spaces at both ends. Has the effect of the wick as a latent heat type heat pipe by phase change. Therefore, even in the meandering small-diameter tunnel space that forms the first component, it is applied as a plate heat pipe utilizing latent heat due to the phase change of the hydraulic fluid by adjusting the amount of the hydraulic fluid enclosed, that is, as a highly sensitive plate heat pipe. You can

The meandering small-diameter tunnel container having the appropriately adjusted amount of the enclosed liquid as described above has characteristics as a normal small-diameter tunnel heat pipe, and at the same time, has characteristics as a meandering small-diameter tunnel heat pipe having an extremely rich gas phase. Since it has a large amount of heat than ordinary thin tunnel heat pipes, it does not cause dry out even with shocking rapid heating, and it has excellent characteristics such as good operation even in top heat posture. I have both. Therefore, the composite heat pipe of the present invention can be applied as a plate heat pipe having both the characteristics of the second component, that is, the small-diameter tunnel heat pipe with extremely sensitive sensitivity and the above-mentioned gas-phase rich meandering small-diameter tunnel heat pipe. Can be done.

[0033]

【Example】

[First Embodiment] In the first embodiment, the meandering small-diameter tunnel space built in the plate heat pipe of the first component of the composite plate heat pipe of the present invention illustrated in FIGS. The volume of two-phase condensable hydraulic fluid corresponding to the volume of at least 20% or more of the product is enclosed, and the entire contents are stored in the space connected with the non-meandering tunnel group contained in the second component plate heat pipe. At most 2 products
A two-phase condensable hydraulic fluid of an amount corresponding to a volume of 0% or less is enclosed.

The serpentine small-diameter tunnel heat pipe 1 in which the plate heat pipe of the first component is built is disclosed in Patent No. 19
Since it is an application of No. 67738 (loop type thin tube heat pipe), exactly the same characteristics are exhibited by enclosing the same amount of hydraulic fluid as that. That is, in order to make good use of its characteristics, the selection ratio differs depending on the tunnel diameter, the number of meandering turns, the required heat transport amount, etc., as in the meandering thin tube heat pipe, but its internal volume is 25 % ~ 8
It is necessary to enclose and seal the hydraulic fluid that occupies 0% volume.
The heat transfer performance is such that the amount of the enclosed hydraulic fluid is 20% to 85% of the internal volume.
When it goes out of the range of%, it drops sharply and almost loses its function as a meandering thin tube heat pipe. The main reason for this is that due to the large compressibility of the expanded gas phase part of the hydraulic fluid, the energy for vibration and circulation generated in the heat receiving part is absorbed, making it impossible for pressure waves to propagate in the narrow tube. Conceivable.

The non-meandering small-diameter tunnel heat pipe group 2 of the plate heat pipe of the second component is a conventional small-diameter wickless heat pipe. A normal wickless heat pipe can operate with an enclosed hydraulic fluid amount of 8% to 50% of the internal volume, but the enclosed amount is 10% to 30% for exhibiting good performance. However, in the case of the second component, the non-meandering tunnel group is a tunnel formed by the space formed by itself in the embossed gap of the first component, so that the equivalent diameter of each tunnel is a small diameter of 5 mm or less. In this case, when the amount of the enclosed hydraulic fluid exceeds 20%, the tunnel is filled with the surface tension of the hydraulic fluid, and the vapor of the hydraulic fluid cannot be moved. It loses its function as a heat pipe of the type that uses latent heat of evaporation and condensation.

For these reasons, the composite plate heat pipe of this embodiment has the first component of 20% of the total internal volume.
As described above, 20% or less of the total internal volume of the second component is enclosed and sealed, which allows the plate heat to operate sensitively even with a small temperature difference and low heat input, and still have a large heat transport capability. A pipe can be constructed.

[Second Embodiment] The second embodiment is shown in FIGS.
In the meandering small-diameter tunnel space of the first component plate heat pipe 1 in the composite plate heat pipe of the present invention illustrated in FIG. 2, the amount of the two-phase condensability corresponding to the volume of at most 20% or less of the total internal volume thereof. At most 20% of the total internal volume of the space in which the hydraulic fluid is enclosed and the non-serpentine tunnel group of the second component plate heat pipe 2 is connected
The two-phase condensable hydraulic fluid in an amount corresponding to the following volume is enclosed.

The heat transfer of the meandering thin tube heat pipe is carried out by vibrating and / or circulating the working fluid. Therefore, 20% or more of the total working volume of the thin fluid must be sealed and sealed. However, in the meandering small-diameter tunnel heat pipe 1 which is the first component of the plate heat pipe of the present invention, the wedge-shaped projections 1-5 are provided at both ends in its elliptical or semicircular cross-sectional shape, It acts as a heat pipe wick. Therefore, it is possible to operate even if the amount of the enclosed hydraulic fluid is 20% or less. However, in this case, heat transfer occurs due to latent heat due to a phase change when the working fluid vapor moves.

Because of this, as in the present embodiment, in both the plate heat pipe of the first component and the plate heat pipe of the second component, the amount of the filled working fluid is 20% or less of their internal volume. When configured as, the composite plate heat pipe of the present invention becomes a heat pipe that utilizes the latent heat of the phase change during movement of the working fluid vapor, and the total heat transport capacity is reduced, but the plate heat pipe with extremely sensitive operation is used. Therefore, it works well even with a small temperature difference, and also works actively with a small amount of heat input. In addition, as an effect of being a meandering small-diameter tunnel heat pipe, the small-diameter heat pipes for each turn complement each other to improve performance, and vibrations occur in the working fluid vapor, which causes heat transfer capability. The posture dependency of is reduced, and the heat transport capacity is lower than that in the case of the vibration of the liquid phase hydraulic fluid of the first embodiment, but heat transport during top heat is also possible.

[Third Embodiment] The third embodiment is shown in FIGS.
In the composite plate heat pipe of the present invention illustrated in FIG. 1, the plate heat pipes of the first and second constituent elements, the meandering and non-meandering small-diameter tunnel heat pipes 1, 2 have mutually optimum operating temperature regions in the tunnel spaces. And a two-phase condensable hydraulic fluid having different components is encapsulated. This significantly expands the optimum operating temperature range of the composite plate heat pipe.

To give an example, the plate heat pipe of the first component has 25% of ethyl alcohol in pure water working fluid.
Enclose the mixed working fluid (freezing temperature -20 ° C) to which
Freon HCFC-142b was enclosed as the working fluid of the plate heat pipe of the second component. This composite plate heat pipe has a high function which was impossible at all with a conventional heat pipe which operates well in a wide range from -5 ° C. to + 180 ° C. in the temperature control range of the heat receiving part. . However, the cooling air temperature range in this case is -35
The temperature was from + 120 ° C to + 120 ° C.

In this case, the first component plate heat pipe at the time of enclosing the mixed working fluid exhibits substantially the same heat transport capacity as that of the case where the Freon HCFC-142b is enclosed at the heat receiving portion temperature of + 80 ° C. . Thus, as the temperature of the heat receiving section increases, the heat transport capacity of the mixed working fluid increases, and at + 180 ° C., the heat transport capacity of the mixed working fluid increases to almost twice that of HCFC-142b. As the temperature of the heat receiving part falls below + 80 ° C, the heat transport capacity of the mixed hydraulic fluid decreases, and when it reaches around + 30 ° C, H
It drops to almost one half of CFC-142b.
When the temperature of the heat receiving part further decreases, the operation of the mixed working fluid becomes inactive, and the HCFC-142b does not change, and when the temperature becomes 0 ° C or less, the heat transport capacity of the mixed working fluid becomes HCFC-142b.
To about one tenth of its heat transport capacity. The difference in the performance of the heat transport ability occurs due to the difference in the boiling points of the respective working liquids. The boiling point of pure water is + 100 ° C, the boiling point of ethyl alcohol is + 78.5 ° C, and HCFC-142b.
Has a boiling point of −9.7 ° C., and the heat transporting ability of the working liquid exhibits high performance above the respective boiling points, and below the boiling points, the performance decreases as the temperature decreases. In the composite type plate heat pipe of the present invention, the plate heat pipe of the first component and the plate heat pipe of the second component complement each other in all temperature regions of the heat receiving part temperature, in any temperature condition Both show the operating characteristics of the hydraulic fluid on the favorable side of any of the conditions, and this triggers the activation of the hydraulic fluid on the other side, so that the best characteristics can be exhibited.

[Fourth Embodiment] [Fifth Embodiment] There is a problem of compatibility between the metal material of the heat pipe and the sealed working fluid. If the compatibility is poor, a chemical reaction occurs between the metal material and the working fluid, and the working fluid may be deteriorated and performance may be severely reduced, or the heat pipe container may be damaged by corrosion. The composite plate heat pipe of the present invention often uses different kinds of hydraulic fluids for the first constituent element and the second constituent element, respectively. Therefore, when the entire composite plate heat pipe is made of the same material, the type of hydraulic fluid is limited to the hydraulic fluid that is compatible with that material, and the applicable range of the composite plate heat pipe is limited to the applicable range of the hydraulic fluid. . The fourth and fifth examples are examples as a countermeasure, and at least the surface of each constituent element that comes into contact with the hydraulic fluid is a material having good compatibility with the applied hydraulic fluid. It is configured like.

FIG. 7 is a cross-sectional explanatory view of [Fourth Embodiment], which is a meandering tunnel pattern in a laminated plate composed of two metal plates for forming the plate heat pipe of the first component. The plate on the side formed as an emboss is a laminated plate made up of thin metal plates a ₁ and b ₁ which also consist of two kinds of metal materials a and b, and these laminated plates a ₁ and b ₁ and one side thereof Of the thin metal plate a ₁ and another metal plate a _{2 made of the} same material as that of the thin metal plate a ₁ form a _first component part, and the thin metal plate b on the other side is formed. Another metal plate b made of the same material as _1.
2 and the top group of the meandering small-diameter tunnel pattern embossing formed by the laminated plates a ₁ and b ₁ , and the outer peripheral edge leaving a slight gap in the outer circumference of the meandering pattern embossing pattern of the flat metal plate b _2. And the outer peripheral edge of the first component are airtightly joined together to form the second component part, which is formed in each of the first component part and the second component part. A narrow meandering tunnel space a ₀ ,
In b ₀ , working fluids having good compatibility with the respective metal materials a and b are selectively sealed and sealed, and the metal materials a and b are the meandering small-diameter tunnel spaces a ₀ and b _0. Each of the metal materials is a metal material selectively determined from among metal materials having good compatibility with the target working fluid to be sealed and sealed, or the predetermined working fluid is targeted. It is characterized in that it is any one of the working fluids which is selectively determined from among the working fluids having a good compatibility with the metal materials a and b.

All of the composite plate heat pipes of the present invention are made of pure aluminum, ethyl alcohol is filled in the plate heat pipe of the first component as a working fluid, and Freon H is added to the plate heat pipe of the second component.
It was possible to construct a plate heat pipe that encapsulates CFC-142b and that operates relatively well in a wide application temperature range of -5 ° C to + 180 ° C. Freon HCFC-142
The compatibility of b with pure aluminum is extremely good and has been proven to withstand long-term continuous use for over 20 years.
However, the compatibility of ethyl alcohol with pure aluminum has not yet been proven to withstand long-term continuous use, while the compatibility of methyl alcohol with pure aluminum is incompatible. . Therefore, the long-term reliability of applying ethyl alcohol to a pure aluminum container has been a problem in that anxiety cannot be wiped out.

On the other hand, the compatibility between pure water and pure copper is extremely good, and it has been proven that it can withstand continuous use for several decades. Further, it has been proved that the pure water hydraulic fluid heat pipe is extremely superior to the ethyl alcohol hydraulic fluid heat pipe. From these things, in order to solve the above-mentioned problems, pure copper is used as the metal material a and pure aluminum is used as the metal material b in the composite heat pipe of this embodiment of FIG. Shaped plate a ₁ and pure aluminum thin plate b
The laminated plate of _{No. 1} was used, the flat metal plate a ₂ was made of pure copper, and the flat metal plate b ₂ was made of pure aluminum to form a composite plate heat pipe container. In the meandering small-diameter tunnel space a ₀ , a mixed working liquid (freezing temperature −20 ° C.) in which 25% of ethyl alcohol was added to a pure water working liquid was enclosed to form a first component plate heat pipe. In addition, Freon HCFC-142b was enclosed in the meandering small-diameter tunnel space b ₀ to form a second component plate heat pipe, and the composite plate heat pipe of the fourth embodiment was formed as a whole. The composite plate heat pipe of the fourth embodiment having such a structure is -5.
It has become possible to operate extremely well in a wide temperature range from ℃ to + 180 ℃ and to guarantee long-term reliability for 20 years. In addition, this composite type plate heat pipe ethyl has been able to use pure water hydraulic fluid containing alcohol, which greatly improves the heat transport capacity,
There is no fear of freezing at low temperature.

In FIG. 7, the thin plates a ₁ and b ₁ forming the meandering small-diameter tunnel pattern embossing do not necessarily have to be thin plates. It may be a thin film layer of a sprayed metal or a metal plating layer. Further, the flat metal plates a ₂ and b ₂ do not necessarily have to be plates made of a single material. A plate having a composite structure may be used as long as all the inner wall surfaces of the tunnel spaces a ₀ and b ₀ are made of a metal material having good compatibility with the working fluid enclosed therein.

The basic structure of the fifth embodiment will be described below with reference to FIGS. 7 and 8. One of the thin metal plates a ₁ and b ₁ in FIG. 7 is a thin film layer (including a plating layer) of one of the metal materials a and b as illustrated in FIG. 8, and in FIG. Either one of the metal plates a ₂ and b ₂ may be replaced by a metal material a or b as illustrated in FIG.
The reinforcing metal plate a ₃ or b ₃ formed of any metal material coated with the thin film layer (including a plating layer) a ₂ or b ₂ may be used. The inner wall surfaces of ₀ and b ₀ are characterized in that they are formed of respective metal materials a and b which have a good compatibility with the working fluid enclosed therein.

FIG. 8 shows an example of the embodiment having the above-mentioned basic structure. The flat metal plate b ₂ in FIG. 7 is a plated thin film layer formed on the reinforcing metal plate b ₃ in FIG. It has been replaced by b ₂ . The thin metal plate (meandering small-diameter tunnel pattern embossing) b ₁ in FIG. 7 is the plating thin film layer b ₁ applied to the thin metal plate (meandering small-diameter tunnel pattern embossing) a ₁ in FIG. It has been replaced. That is, in FIG. 8, the inner wall surface of the space a ₀ of the second component plate heat pipe is entirely formed of a plated thin film layer. As a practical example of this configuration, the flat metal plate a ₂ , the thin metal plate a ₁ , and the reinforcing metal plate b ₃ are pure aluminum plates, and the plated thin film layers b ₁ and b ₂ are pure copper plated thin film layers. Freon HCFC-142b is enclosed in the diameter tunnel space a ₀ to form the first component heat pipe, and pure water hydraulic fluid is enclosed in the meandering small diameter tunnel space b ₀ to form the second component heat pipe. And the composite plate heat pipe of the fifth embodiment was constructed as a whole. The composite type plate heat pipe of the fifth embodiment having such a configuration is -5 ° C to + 180 ° C.
It is possible to operate extremely well over the wide temperature range up to and to guarantee long-term reliability for 20 years.

[Sixth Embodiment] [Seventh Embodiment] These embodiments relate to a composite structure of composite plate heat pipes. The double composite structure referred to here is not a structure in which the composite structures are simply laminated and joined, but two composite structures are combined into a thinnest structure and a means having the smallest contact thermal resistance. Means structure. A normal plate heat pipe can be increased in heat transport capacity or function by laminating a plurality of plate heat pipes. However, in the case of the composite plate heat pipe of the present invention, other ordinary plate heat pipes may be laminated on it,
It is not always possible to increase its function and performance. It is impossible to realize in other heat pipes because the composite plate heat pipe of the present invention is enclosed in each of the first and second components, and the respective hydraulic fluids having different operation regions complement each other. It is due to the fact that it is configured as a high performance plate heat pipe having a wide operating area. That is, the composite plate heat pipe of the present invention and the plate heat pipe that can be laminated and combined are required to have a wider functioning range of the operating region. It is necessary to avoid the deterioration of operation. As a means for this, in this embodiment, a structure is used in which two composite plate heat pipes of the present invention having substantially the same structure are made into a composite structure.

The composite plate heat pipe of the present invention is characterized in that its heat conduction function has a strong anisotropy as a characteristic generated from its structure, and it exhibits an excellent heat transport function. Therefore, the composite compound structure includes a composite compound structure that enhances anisotropy and a heat transport function, and a composite compound structure that eliminates anisotropy and enhances a heat diffusion function in all directions. As a means for this, in the present embodiment, a double-composite structure in which the alignment directions of the small-diameter tunnels contained in the two composite-type plate heat pipes to be composited are parallel to each other and There are two types of structures, a composite structure.

As the double-composite structure, it is desirable that the thickness of the double-composite structure is as thin as possible. Further, it is desirable that the contact thermal resistance of the composite-composite surface is as small as possible.
For that purpose, in the present embodiment, the metal plate which is the boundary of the coalescence on the compound composite coalescing surface or the component which is the boundary of the coalescence is made common or common to the two composite plate heat pipes. , The contact structure was eliminated and the contact thermal resistance was close to zero. This is the point that the composite composite structure of this embodiment is different from the simple laminated adhesive structure.

FIG. 9 is an explanatory view showing the construction of the composite plate heat pipe having the composite composite structure of the above [Sixth Embodiment]. The basic structure is as follows. That is, as the component Yes is applied plate heat pipe of the two sheets of the first component of p _1, p _2, these p _1, p ₂
Is a component having a flat surface on one side and a meandering tunnel pattern embossed on the other side, and the second component p ₄ is any one of the first components of p ₁ and p ₂ . It is constituted by joining the plane side of _one component p ₁ or p ₂ and the embossing surface side of the other component p ₂ or p ₁ . The relative direction of the two first components in the joint is a direction in which the alignment directions of the linear portion groups of the meandering tunnel of the respective components are parallel to each other or orthogonal to each other. It is characterized by being either. FIG. 9 shows an example of joining in directions orthogonal to each other.

In this structure, since the second constituent element p ₄ is made common, no thermal resistance occurs in the _{two first} constituent elements p ₁ and p ₂ combined. Therefore, when the tunnels are aligned in a direction parallel to each other, the heat transport performance is almost doubled. When the tunnels are compounded in the directions orthogonal to each other, the mutual transport heat is diffused in the direction orthogonal to the direction of heat propagation, so the heat transport function of the complex plate heat pipe is anisotropic. The heat diffusion function in all directions is significantly enhanced. As for these practical functions, the former efficiently absorbs and transports the heat quantity of a wide range of heating elements or heating elements, but is less efficient in transporting the heat quantity of a narrow heating element or heating element. The latter is inferior to the former in the heat transfer capacity of a wide range of heating elements or heating elements, but is extremely efficient in transferring the heat value of a narrow heating element or heating element, and exhibits an excellent effect of equalizing the temperature on the plate heat pipe surface. To do.

The composite plate heat pipe of the sixth embodiment as described above has a flat surface on one side and an embossed surface on the other side, so that it is used as a mounting surface for heating means and heat radiating means, that is, as a component mounting surface. Can only be used on one side. On the other hand, however, the embossed surface has a feature that when the surface itself is used as a heat radiating means, the heat radiating effect is increased due to the enlarged surface area and the separation effect of the convection boundary layer.

[Seventh embodiment] is an embodiment of a structure in which both surfaces of a composite plate heat pipe can be applied as component mounting surfaces. In order to utilize both surfaces as the component mounting surface, the amount of heat transport required by itself also increases, so the heat transport performance or heat diffusion performance must also exceed the performance of the sixth embodiment. The [Seventh embodiment] makes it possible.

FIG. 10 is an explanatory view showing the structure of the composite plate heat pipe having the composite composite structure of the above [Seventh embodiment]. The basic structure is as follows. That is, the plate heat pipes of the two _first components of p ₁ and p ₂ are applied as the components, and these plate heat pipes p ₁ and p ₂ are applied.
Is a component having a flat surface on one side and a meandering tunnel pattern embossed on the other side, and a thin plate p ₃ is used as a common plate as a plate for forming the second component. The thin plate p ₃ is sandwiched and joined by a plane formed by the embossed top portion of the _{two first} components p ₁ and p ₂ on the side where the embossing of the meandering tunnel pattern is formed,
By this, two second components p ₄ and p ₅ are formed, and the relative directions of the two first components in the joint are determined by the straight line group of the meandering tunnel of each component. It is characterized in that the alignment directions are either directions parallel to each other or directions orthogonal to each other. FIG. 10 shows an example of joining in directions orthogonal to each other.

The composite plate heat pipe having the composite composite structure of the [Seventh embodiment] is composed of two first constituent elements and two second constituent elements, and has a heat transfer larger than that of the sixth embodiment. Ability and large heat diffusion ability. Although it is slightly thicker than that of the sixth embodiment, it is possible to mount components on both sides and to mount many heat generating components and heating components.

[0059]

EFFECT OF THE INVENTION A plate heat pipe containing a serpentine small-diameter tunnel heat pipe as a first constituent element, and a heat pipe containing a non-serpentine small-diameter tunnel heat pipe as a second constituent element In the composite plate heat pipe of the present invention that is integrated and built in, the first component exhibits various performances peculiar to the meandering thin tube heat pipe, and the second component complements the unprecedented place and is unique. The effect of exerting the function of was obtained. The main effects were as follows. It has become possible to apply as a high-sensitivity and large-capacity plate heat pipe that can sensitively operate even with a small temperature difference over the entire heat amount region even from a small heat input of several watts to a large heat input of several kilowatts. In addition, by filling different types of hydraulic fluids with different operating temperature ranges into each of the first component plate heat pipe and the second component plate heat pipe, a wide operating temperature range can be provided or optimal operation at low temperatures. Despite having an area, it has become possible to construct a special type of plate heat pipe capable of large heat transport. By adjusting the amount of enclosed hydraulic fluid, it can be selected as a large-capacity sensible heat type plate heat pipe due to axial vibration of the hydraulic fluid, or as a highly sensitive latent heat type plate heat pipe due to the phase change of the moving hydraulic fluid. It has become possible to apply it to any type of heat pipe. Furthermore, by adopting a multiple structure, it has become possible to double the heat transport capacity, or to construct a plate heat pipe having excellent heat diffusion capacity and extremely excellent temperature uniformization performance.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an example of a composite plate heat pipe of the present invention.

FIG. 2 is a sectional view of another example of the composite plate heat pipe of the present invention.

FIG. 3 is a side sectional view of a flat metal plate which is a constituent material of the composite plate heat pipe of the present invention.

FIG. 4 is a plan view of a partial cross section of a flat metal plate which is a constituent material of the composite plate heat pipe of the present invention.

FIG. 5 is a cross-sectional view of a plate heat pipe which is a first component of the composite plate heat pipe of the present invention.

FIG. 6 is an explanatory view showing a composite state of the plate heat pipe of the first constituent element and the plate heat pipe of the second constituent element of the composite plate heat pipe of the present invention, and a partial sectional view thereof.

FIG. 7 is a partially enlarged sectional view of a fourth embodiment of the composite plate heat pipe of the present invention.

FIG. 8 is a partially enlarged sectional view of an example of a fifth embodiment of the composite plate heat pipe of the present invention.

FIG. 9 is a partially enlarged cross-sectional view of an example of a multiple structure of a sixth embodiment of the composite plate heat pipe of the present invention.

FIG. 10 is a partially enlarged cross-sectional view of another example of the multiple structure of the seventh embodiment of the composite plate heat pipe of the present invention.

[Explanation of symbols]

1 Meandering small-diameter tunnel heat pipe 1-1 Flat metal plate 1-2 Meandering small-diameter pattern embossing (flat metal plate) 1-3 Meandering pattern non-joint part 1-4 Meandering small-diameter tunnel space 1-5 Wedge-shaped projection space 2 Non Meandering small-diameter tunnel heat pipe group 2-1 Flat metal plate 2-2 Flat metal plate 2-4 Non-meandering thin tunnel space 2-5 Wedge-shaped projection space a ₀ Meandering thin tunnel space b ₀ Non-meandering thin tunnel space a ₁ thin metal plate (meandering thin tunnel pattern embossing) b ₁ thin metal plate (meandering thin tunnel pattern embossing) a ₁ plated thin film layer (thin metal plate) b ₁ plated thin film layer (thin metal plate) a ₂ Flat metal plate b ₂ Flat metal plate b ₃ Reinforcing metal plate

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[Procedure amendment]

[Submission date] July 24, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

[Figure 3]

Claims (8)

[Claims] 1. A plate heat pipe comprising a meandering small-diameter tunnel heat pipe whose main heat transport principle is heat transport by sensible heat of the working fluid (heat transport by vibration and / or circulation of the working fluid) as a first constituent element. The second component is a heat pipe consisting of a non-serpentine small-diameter tunnel heat pipe whose main heat transport principle is heat transport by latent heat of the working fluid (heat transport by evaporation and condensation when the working fluid moves in vapor). , A composite plate heat pipe in which both components are combined and integrated, and the plate heat pipe of the first component basically has one plate as compared to the other plate. Two thin plates of malleable metal, either made of a malleable metal material or made thinner, are joined together to form a laminated plate, The joining of the laminated plates is a joining in which a long narrow non-joining portion of a meandering pattern consisting of a turn portion and a parallel portion is left on the joining surface, and this non-joining portion is expanded by a high-pressure fluid to form a laminate. A long and narrow meandering tunnel space consisting of a turn part and a parallel part is formed on the joint surface, and this tunnel space has an elliptical or semicircular cross-sectional shape with wedge-shaped projection spaces at both ends, and its equivalent diameter. Is less than 5 mm and the meandering pitch is about 20 mm
Below, on one of the outer surface of one side or both sides of this laminated plate, the meandering pattern embossing that naturally occurs is formed corresponding to the cross-sectional shape of the meandering tunnel space and corresponding to the meandering pattern. Yes, a predetermined two-phase condensable hydraulic fluid is enclosed in the meandering thin tunnel space,
It is characterized by being a plate heat pipe configured as a meandering small diameter tunnel heat pipe, wherein the plate heat pipe of the second component has the meandering pattern embossing of the laminated plate heat pipe of the first component. A thin flat metal plate is joined to a surface (one surface or both surfaces) along the plane formed by the embossed top, and a slight gap is left on the meander pattern embossed pattern outer circumference of this flat metal plate. The edge is hermetically joined to the outer edge of the first component, and the gap formed between the inner plane of the metal plate and the meandering pattern embossed surface by this joining naturally forms a wedge-shaped projection space at the corner. A space is formed by connecting a group of non-serpentine tunnel spaces with a semicircular cross-section, and a predetermined two-phase condensability is formed in this space. A plate heat pipe in which a moving fluid is enclosed and configured as a concatenated heat pipe of a small-diameter tunnel heat pipe group, wherein the first and second constituent elements as described above are self-integrated as described above. The composite plate heat pipe is characterized by being configured as a thin plate heat pipe that operates as a whole by complementing each other. 2. The two-phase condensable hydraulic fluid in an amount corresponding to at least 20% or more of the total internal volume is enclosed in the meandering small-diameter tunnel space of the plate heat pipe of the first component, The space connected to the non-serpentine tunnel group of the second component plate heat pipe is filled with a two-phase condensable hydraulic fluid in an amount corresponding to at most 20% or less of the total internal volume. The composite plate heat pipe according to claim 1, wherein: 3. The meandering small-diameter tunnel space of the plate heat pipe of the first component has at most 2 of its total internal volume.
The two-phase condensable hydraulic fluid in an amount corresponding to a volume of 0% or less is enclosed, and the space in which the non-serpentine tunnel group of the second component plate heat pipe is connected is at most 20 of the total internal volume. The composite plate heat pipe according to claim 1, wherein an amount of the two-phase condensable hydraulic fluid corresponding to a volume of 1% or less is enclosed. 4. A two-phase condensable hydraulic fluid having different optimum operating temperature regions and different components is enclosed in each of the tunnel spaces of the plate heat pipes of the first and second constituent elements. The composite plate heat pipe according to claim 1, wherein: 5. In a laminated plate composed of two metal plates for forming a plate heat pipe of the first component, the plate on the side formed as the meandering tunnel pattern embossing is itself of two kinds. It is a laminated plate of thin metal plates a ₁ and b _{1 made} of predetermined metal materials a and b. The laminated plate a ₁ and b ₁ and another thin metal plate a ₁ on one side thereof are made of the same material. The first component is formed by a laminated plate in which the metal plate a ₂ and the metal plate a ₂ are joined and laminated, and another metal plate b made of the same material as the thin metal plate b ₁ on the other side.
_{2 and} the top group of the meandering small-diameter tunnel pattern embossing formed by _{the laminated plates a 1} and b ₁ , and the outer peripheral edge leaving a slight gap in the outer circumference of the meandering pattern embossing pattern of the flat metal plate b _2. Is airtightly joined to the outer peripheral edge of the first component, and by this joining, the second component is formed by the inner plane of the metal plate and the meandering pattern en. Of the tunnel space a ₀ , b formed in each of the component parts of
₀ The respective metal materials a, predetermined hydraulic fluid s good husband compatible b and each is Yes to airtightly sealed sealing, the metal material a, b are sealed to the people each tunnel space a _0, b ₀ The metal material is a metal material selectively selected from metal materials having good compatibility with a predetermined working fluid to be sealed, or the predetermined working fluid is a target metal material a, 2. The composite plate heat pipe according to claim 1, wherein the composite plate heat pipe is one that is selectively determined from among hydraulic fluids having a good compatibility with b. 6. One of the thin metal plates a ₁ and b ₁ is a thin film layer (including a plating layer) of any of the metal materials a and b, and one of the metal plates a ₂ and b ₂ Is a reinforcing metal plate a ₃ or b _{3 made} of any metal material coated with a thin film layer (including a plating layer) a ₂ or b ₂ of the metal material a or b instead. The inner wall surfaces of the tunnel spaces a ₀ and b ₀ are configured so as to be a material formed only of the metal materials a and b having good compatibility with the working fluid enclosed therein. The composite plate heat pipe according to claim 5. 7. A plate heat pipe of two _first components of p ₁ and p ₂ is applied as a component,
Each of these p ₁ and p ₂ is a component having a flat surface on one side and a meandering tunnel pattern embossed on the other side, and the second component is a component of those p ₁ and p ₂ . The plane side of one of the constituent elements and the top group of the embossing of the other constituent element are joined, and the outer peripheral edge that leaves a slight gap in the outer circumference of the meandering pattern embossing on the plane side of this constituent element is the first. It is configured to be airtightly joined to the outer peripheral edge of the component of, and the relative direction of the two first components in the joining is the alignment direction of the linear portion group of the meandering tunnel of each component. , The directions parallel to each other or the directions orthogonal to each other, the composite plate heat pipe according to claim 1. 8. A plate heat pipe of two _first components of p ₁ and p ₂ is applied as a component,
Each of these p ₁ and p ₂ is a component having a flat surface on one side and a meandering tunnel pattern embossed on the other side, and a thin plate p ₃ is used as a plate for constituting the second component. Is used as a common plate, and this thin plate p ₃ is formed by the plane formed by the embossed top of the _{two first} components p ₁ and p ₂ on the side where the embossing of the meandering tunnel pattern is formed. The outer peripheral edge of the thin plate p ₃ which is sandwiched and bonded and which leaves a slight gap on the outer periphery of the meandering pattern embossing of the thin plate p ₃ is airtightly bonded to the outer peripheral edges of the _{two first} constituent elements p ₁ and p _2. It consists Te, the two adjacent by their joining second component p _4, p ₅ is Yes is configured, relative direction, the respective components of the two sheets of first component in the junction The composite plate heat according to claim 1, wherein the alignment directions of the linear portion groups of the meandering tunnel are either directions parallel to each other or directions orthogonal to each other. pipe.