JPH11304387A - Heat-exchanging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve heat transfer effect and to enable manufacturing of a device inexpensively by using a metal fiber body with a breathing property that is assembled by machining a metal with an improved heat conductivity in a fiber shape for a fin. SOLUTION: A pipe 10 is made of copper with improve heat conductivity, a copper alloy, aluminum, or an aluminum alloy and has fluid for transferring heat inside. A metal fiber body 11 with a breathing property where metal with an improved heat conductivity is machined and assembled in a fiber shape is arranged around the pipe 10. The metal fiber body 11 is made of a cotton-like mass of extremely fine fiber of aluminum or aluminum alloy and is constituted cylindrically, thus increasing a surface area where heat is propagated and hence improving a heat efficiency. Also, since it is made of metal, it can be used at a high temperature and at the same time inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inexpensive heat exchanger having a high heat exchange efficiency, and more particularly to a fin provided around a heat exchanger through which a fluid for heat exchange passes.

[0002]

2. Description of the Related Art Conventionally, a plate-like fin or a pin fin made of a metal ring having good heat conductivity is attached around a heat exchanger (specifically, a heat transfer tube or a heat pipe) used in a heat exchanger. In this way, a heat exchange body is provided with a substantial surface area to increase the heat exchange efficiency, and a guide formed by bending a plate material around the heat exchange body so that the fluid to be subjected to heat exchange directly hits the heat exchange body is provided. There was something. Thus, heat exchange between the fluid passing through the heat exchanger and the fluid flowing around the heat exchanger is performed.

[0003]

However, conventional plate-like fins or pin fins also need to be of a certain thickness or diameter because of their high strength, which limits the surface area. When the surface area is limited, there is a problem that the contact with the fluid is reduced, thereby reducing the heat transfer efficiency. The present invention has been made in view of such circumstances, and has as its object to provide a heat exchange device that has high heat transfer efficiency and can be manufactured at low cost.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The heat exchange device described above, a heat exchange body through which a fluid flows,
What is claimed is: 1. A heat exchange apparatus comprising: a fin provided in contact with or in contact with said heat exchanger, wherein said fin is formed by processing a metal having good heat conductivity into a fibrous shape and assembling said metal fiber. Uses body. According to a second aspect of the present invention, in the heat exchange apparatus of the first aspect, the metal fiber body has a tubular shape and surrounds the heat exchange body. The heat exchange device according to claim 3 is the heat exchange device according to claim 1, wherein the metal fiber body is formed in a sheet shape, and a plurality of the heat exchange members arranged in a staggered cross section at different positions from the outside. It is bent and arranged so as to surround it sequentially. According to a fourth aspect of the present invention, in the heat exchange apparatus of the first aspect, the metal fiber body is formed of a block, and the plurality of heat exchangers are arranged in the block. According to a fifth aspect of the present invention, in the heat exchange device of the fourth aspect, the block is provided with a plurality of ventilation holes having a diameter larger than an interval between adjacent fibers. The heat exchange device according to claim 6 is the heat exchange device according to claim 1, wherein the metal fiber body is formed in a sheet shape, and the outer periphery of the plurality of cylindrical heat exchange members arranged in parallel is partially formed. It is arranged so as to enclose the flow of the fluid. The heat exchange device according to the seventh aspect is the first aspect of the invention.
7. In the heat exchange device according to any one of Items 6 to 6, the metal fiber body is made of a cotton-like mass or cotton-like sheet of ultrafine fibers of aluminum or an aluminum alloy.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a partial cross-sectional view of the heat exchanger according to the first embodiment of the present invention, FIG. 2 is a partial vertical cross-sectional view, and FIG. 3 is a schematic diagram of a heat exchanger using the heat exchanger. FIG. 4 is a partial cross-sectional view of a heat exchange device according to a second embodiment, FIG. 5 is a perspective view of a heat exchange device according to a third embodiment of the present invention, and FIG. It is a fragmentary sectional view of the heat exchange device concerning a 4th embodiment of the invention.

As shown in FIGS. 1 and 2, a heat exchanger according to a first embodiment of the present invention includes a plurality of pipes 10 which are an example of a heat exchanger through which a fluid passes, and each of which has a pipe 10. And a metal fiber body 11 constituting a fin provided around the pipe 10. Hereinafter, these will be described. The pipe 10 is made of copper, a copper alloy, aluminum, or an aluminum alloy having good heat conductivity, and contains a fluid (for example, water) for transmitting heat therein. Around the pipe 10, a metal fiber body 11 having air permeability, which is formed by processing a metal having good heat conductivity into a fibrous shape and assembling it, is disposed. The metal fiber body 11 is formed of a cotton-like mass of ultrafine fibers of aluminum or an aluminum alloy, and has a cylindrical shape. The inner portion of the metal fiber body 11 is preferably planted around the pipe 10, but may be one in which only the inner portion is joined using an adhesive having good thermal conductivity. Fibrous body 1
The inner surface of the pipe 1 may be in close contact with the pipe 10.

When the outer diameter of the pipe 10 is d1, the outer diameter D1 of the metal fiber body 11 is preferably about 1.2 · d1 to 2 · d1. The interval S1 between the adjacent pipes 10 is
The gap S2 between the metal fiber bodies 11 surrounding these is
It is preferable to adjust so as to be about 0.5 · d1 to 1.5 · d1. Depending on the case, there is a method in which the inside of the metal fiber body 11 is melted to form a pipe, or the inside of the metal fiber body 11 and the pipe 10 are welded.

The diameter of the aluminum fiber forming the metal fiber body 11 is 1/200 to 1/10 mm and the length is 60 m.
m, and the porosity is about 80 to 90%. In addition, it is preferable to form minute bends and irregularities on each wire so that each metal fiber body 11 is more efficiently aggregated.

FIG. 3 shows a heat exchanger (heat exchanger) 12 using the pipe 10 and the metal fiber body 11 having such a structure. As shown in FIG. 3, an upper chamber 13 and a lower The upper chamber 13 and the lower chamber 14 are divided into side chambers 14, and are connected by a plurality of pipes 10 acting as heat pipes. The metal fiber body 11 is provided around the pipes 10 arranged in the upper chamber 13 and the lower chamber 14 as described above.

Vent holes 17 and 18 having connection flanges 15 and 16 are provided on both sides of the upper chamber 13, and vent holes 21 and 22 having connection flanges 19 and 20 are provided on both sides of the lower chamber 14. I have. Therefore, when high-temperature exhaust gas is introduced through the vent 22 of the lower chamber 14,
Heat contained in the high-temperature exhaust gas heats the pipe 10 via the metal fiber body 11. Pipe 10 is upper chamber 13
And the lower chamber 14 are connected to each other, so that heat is transmitted to the upper chamber 13 by the heat pipe action to heat the air sent from the vent 17 and
Release from On the other hand, the exhaust gas having absorbed heat is
1 to the outside. Thus, for example, when the vents 22 and 18 are connected to the drying chamber and the vents 17 and 21 are connected to the atmosphere, heat from the drying chamber is collected and reused.

Next, a heat exchange apparatus according to a second embodiment shown in FIG. 4 will be described. A pipe 23 (preferably a heat pipe) for performing heat exchange has a staggered cross section at different positions. A large number of metal fiber sheets 24 and 25 are arranged in a zigzag manner so as to sequentially surround the pipes 23 from the outside so as to cross the wind passage indicated by the arrow. As a result, heat contained in the airflow indicated by the arrow is transmitted to the metal fiber sheets 24 and 25 and further transmitted to the pipe 23 to perform heat exchange. The sheets 24 and 25 of the metal fiber body use the same material as the material of the metal fiber body used in the heat exchange device according to the first embodiment, but have a thickness of about 2 to 5 mm. ing. Therefore, sheets 24 and 25 of a metal fiber body are provided in the upper chamber and the lower chamber, respectively, and communicate with each other through the pipe 23 to perform heat exchange.
The sheets 24 and 25 are thin and air-permeable, have low wind resistance, and are provided in a plurality of stages in the flow direction of the fluid, so that the heat of the fluid is transmitted to the pipe 23.

Next, a description will be given of a heat exchanger according to a third embodiment of the present invention shown in FIG. 5, in which a metal fiber block 26 disposed in the upper chamber and a metal fiber block 26 disposed in the lower chamber are described. A block 27 of a fibrous body and a plurality of pipes 28 constituting a heat pipe communicating with each other
And And the ventilation holes 29 and 30 which consist of many horizontal holes are formed in the said blocks 26 and 27,
Heat exchange can be performed by, for example, air flowing through the vent hole 29 and high-temperature exhaust gas flowing through the vent hole 30 so as to face each other. The vents 29, 3
The diameter of 0 is sufficiently larger than the distance between the adjacent metal fibers (for example, about 1 to 10 mm), so that the heat exchange can be performed efficiently by reducing the ventilation resistance.

FIG. 6 illustrates a heat exchanger according to a fourth embodiment of the present invention. The heat exchangers are cylindrical heat exchangers arranged side by side with a gap perpendicular to the direction of fluid flow. A metal fiber sheet 32 is provided on a pipe (heat pipe) 31 which is an example of an exchange body so as to wrap half of the outer circumference from the downstream side and block the flow of fluid.
The sheet 32 is thin similarly to the sheets 24 and 25 and has low airflow resistance. In this way, the heat contained in the fluid directly strikes the front half of the pipe 31 to transfer the heat, and also allows the sheet 32 to absorb the heat and transfer the heat from the rear half of the pipe 31 to the pipe.

In the above embodiment, the metal fiber is an aluminum fiber, but may be an aluminum alloy (for example, duralumin) or the like. When aluminum or aluminum alloy is used, it can withstand a high temperature gas of about 650 ° C. Further, in the above embodiment, the pipes 10 and 2 constituting the heat exchanger are
Although the heat pipes 3, 28 and 31 are all heat pipes, the fluid flowing inside may be a liquid such as water, a gas such as air, or another gas.

[0015]

According to the heat exchange apparatus of the present invention, since the fins are formed of a metal fiber body having good heat conductivity and processed into a fibrous shape and having a gas permeability, the fins are used. The surface area to which heat is to be transmitted can be increased, thereby improving thermal efficiency. Further, since it is a metal, it can be used at a high temperature and is inexpensive. Claim 2
In the heat exchange device described above, since the metal fiber body has a cylindrical shape and surrounds the heat exchange body, heat is transmitted from the surroundings and substitutes for a conventional plate-like fin or pin-like fin. In the heat exchange device according to the third aspect, the metal fiber body is formed in a sheet shape and is bent and arranged so as to sequentially enclose a plurality of heat exchange bodies arranged at different positions in a staggered cross section from the outside. The passing fluid passes through this sheet, so that heat can be transferred from the sheet to the heat exchanger and absorbed evenly. In the heat exchange device according to claim 4, since the metal fiber body is formed of a block, and a plurality of heat exchange bodies are arranged in the block, the configuration is simplified.
It can be manufactured at low cost. In the heat exchange device according to the fifth aspect, since the block is provided with a plurality of ventilation holes having a diameter larger than the interval between adjacent fibers, the ventilation resistance can be reduced. In the heat exchange device according to the sixth aspect, the metal fiber body has a sheet shape, and is arranged so as to partially surround the outer periphery of the plurality of cylindrical heat exchangers arranged in parallel and to block the flow of fluid. As a result, hot air directly hits the front half of the heat exchanger, and heat is transferred from the sheet-like metal fiber body from the rear half, so that heat can be exchanged more efficiently. In the heat exchanger according to the seventh aspect, the metal fiber body is made of a cotton-like mass or a cotton-like sheet of ultrafine fibers of aluminum or an aluminum alloy.
Can withstand high temperatures, and has a large amount of retained heat, so that heat exchange can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a heat exchange device according to a first embodiment of the present invention.

FIG. 2 is a partial longitudinal sectional view of the same.

FIG. 3 is an overall view showing a schematic configuration of a heat exchanger using the heat exchanger.

FIG. 4 is a partial cross-sectional view of a heat exchange device according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a heat exchange device according to a third embodiment of the present invention.

FIG. 6 is a partial sectional view of a heat exchange device according to a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Pipe (heat exchanger) 11 Metal fiber body 12 Heat exchanger 13 Upper chamber 14 Lower chamber 15 Flange 16 Flange 17 Vent 18 Vent 19 Flange 20 Flange 21 Vent 22 Vent 23 Pipe (Heat exchanger) 24 Sheet of metal fiber body 25 Sheet of metal fiber body 26 Block of metal fiber body 27 Block of metal fiber body 28 Pipe 29 Vent hole 30 Vent hole 31 Pipe (heat exchanger) 32 Sheet of metal fiber body

Claims (7)

[Claims] 1. A heat exchange device comprising a heat exchange body through which a fluid flows, and fins joined or abutted to the heat exchange body, wherein a metal having good heat conductivity is formed on the fins. A heat exchange device using a metal fiber body having air permeability that is processed into a fibrous shape and assembled. 2. The heat exchange device according to claim 1, wherein the metal fiber body has a tubular shape and surrounds the heat exchange body. 3. The metal fiber body is formed in a sheet shape, and is bent and arranged so as to sequentially surround a plurality of the heat exchangers arranged at different positions in a staggered cross section from the outside. Heat exchange equipment. 4. The metal fiber body comprises a block,
The heat exchange device according to claim 1, wherein a plurality of the heat exchange bodies are arranged in the block. 5. The heat exchange device according to claim 4, wherein the block is provided with a plurality of ventilation holes having a diameter larger than an interval between adjacent fibers. 6. The metal fiber body is formed in a sheet shape, partially surrounding the outer periphery of the plurality of cylindrical heat exchangers arranged in parallel, and arranged so as to block the flow of the fluid. The heat exchange device according to claim 1. 7. The heat exchange device according to claim 1, wherein the metal fiber body is made of a cotton-like mass or a cotton-like sheet of ultrafine fibers of aluminum or an aluminum alloy.