JPS62276394A - Heat exchanger - Google Patents

Abstract

PURPOSE:To make it possible to easily work the heat exchanger and to obtain a sufficiently large heat exchange efficiency by superimposing thin plates provided with projections one upon another to form fluid passages at projected parts and forming airstream passage between thin plates. CONSTITUTION:A plurality of thin plates 4 provided with a plurality of projections each having a truncated cone shape and having holes 2 at the top parts, are provided. The plurality of thin plates 4 are superimposed one upon another with gaps formed therebetween. Continuous projections 3 are bonded by brazing and the like, and the inner parts thereof are formed into fluid passages 6 and airstream passages 7 are formed between the superimposed thin plates 4. As the thin plate 4, an aluminum plates or a copper plates is used. This plate is press worked to form projections and fins 3 and 5. Pipes are welded to the fluid passage 6 for introducing a coolant thereto. When the coolant is caused to flow to the fluid passage 6 and a cooling air flow is caused to flow to the fluid passage 7, the heat transfer is continuous and hence the efficiency is excellent because the heat transfer to the coolant is made by allow the coolant to flows through a single member to be cooled.

Description

[Detailed Description of the Invention] Detailed Description of the λ Invention (Industrial Application Field) The present invention provides a heat exchanger that increases the amount of heat exchange per unit weight, thereby reducing the overall size and weight. It is related to.

(Prior Art) Heat exchangers are widely used in water-cooled engine radiators, engine oil coolers, turbo systems, intercoolers, heating and cooling equipment, and the like. Heat exchangers used for various purposes such as these are desired to have higher performance due to constraints such as installation space, weight, cost, and productivity. An example of a conventional device manufactured for this purpose is the so-called fin tube type, as shown in FIGS. 3 and 4. This 1 includes a plurality of metal plates 8, 8 . . . which act as fins. ... are provided with holes, and tubes 9, 9. through which the refrigerant is passed. ... to flow the refrigerant into the inside 10 of the tube 9, and the gap 1 between the metal plates a, a...
1 through which cooling air passes.

The one shown in FIGS. 5 and 6 is called a corrugated type or boupentai/type, and has a large number of holes 12.12. A continuous U of perforated pipes 13 with...
It is bent into a letter shape and fins 14 are provided between them. In this case, the refrigerant is allowed to flow through the holes 12°, 1λ, and so on, and cooling air is passed between the fins 14. The one shown in FIGS. 7 and 8 is called the Dron cup type or the laminated type, and the refrigerant is put into the Dron cup 17 provided with fins 18 through the opening 15 of the end 16, and the cooling air is It is designed to hit the fin 18.

(Problems to be Solved by the Invention) In all of the various conventional heat exchangers described above, the member for passing the refrigerant and the member for passing the cooling air are separate, and these are brazed together. Since it is integrated, heat transfer is discontinuous and there is a problem in that the heat exchange efficiency cannot be increased beyond a certain level.

The present invention has been made in view of this point, and it solves the problems of the conventional examples by completely changing the structure from the above-mentioned conventional examples.

(Means for Solving the Problems) As a means for solving the above problems, the present invention provides a plurality of thin plates each having a plurality of truncated conical protrusions each having a hole at the top. By overlapping and bonding a plurality of thin plates with gaps between them, a fluid passage is formed at the protrusion, and an airflow passage is formed between the plurality of thin plates.

(Function) With such a structure, the fluid passage is formed integrally with the thin plate, so there is no need for brazing, etc. as in conventional ones, and therefore processing is easy and , a sufficiently large heat exchange rate will be obtained.

(Embodiment) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. A plurality of thin plates 4 each having a plurality of protrusions 3 (which may be in the shape of a truncated polygonal pyramid) are provided, and the plurality of thin plates 4 are stacked and bonded with a gap between them. The continuous protrusions 3 are joined by brazing or the like to form a fluid passage 6 inside thereof, and an air flow passage 7 between the stacked thin plates 4. An aluminum plate or a copper plate is used for the thin plate 4 and the closure, and the projections and fins 5 and 3 are formed by pressing this plate. A pipe for guiding the refrigerant is welded to the fluid passage 6 (not shown).

The heat exchanger 1 thus constructed is used, for example, by flowing a refrigerant through the fluid passage 6 and flowing cooling air through the air flow passage 7. When used in this way, the heat to (or from) the refrigerant flows through a single member and is cooled (or heated), so there is no heat transfer fault and the efficiency is high.
Become something. Further, even when the pressure of the refrigerant is high, the pressure resistance can be increased by 1 by overlapping the frustum-shaped projections 3. By arranging the four protrusions in a staggered manner as shown, the ventilation resistance during cooling expansion can be made smaller than that of other types. Since a number of peripheral flanges are formed inside the protrusion, turbulence is created in the refrigerant and heat transfer 11 between the refrigerant and the wall surface is improved.

(Effects of the Invention) The present invention has the following advantageous effects due to the configuration described above.

■ Compared to other types, the heat exchanger per M view is larger, smaller, and more mysterious.

■ Since the truncated conical sections are overlapped under pressure, it is possible to improve adhesion, and even in cases where the overlapping passages have high internal pressure (condensers, evaporators), high pressure resistance can be achieved.

■ Low ventilation resistance of cooling air, improving total performance.

1 ■ The size and shape of the heat exchanger as a whole can be freely set.

1 ■ High productivity and low costs for molds, etc.
You don't have to worry about it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a vertical sectional view of a part of FIG. 1, FIG. 3 is a perspective view of a conventional example, and FIG. A vertical sectional view of a part, FIG. 5 is a perspective view showing another conventional example, FIG. 6 is a vertical sectional view of a part of the one shown in FIG. 5, and FIG. 7 is a perspective view showing still another conventional example. Figure, 8th
1 is a longitudinal sectional view of a portion of the one shown in FIG. 7. 1... Heat exchanger 2... Hole 3... Protrusion 4... Thin plate 6...-Fluid passage 7... Air flow passage Patent applicant Suzuki Motor Co., Ltd. Procedural amendment August 1986 19th 2, Name of the invention Heat exchanger 3, Relationship with the person making the amendment Patent applicant name (20B) Suzuki Motor Co., Ltd. 4, Agent 5, Amendment, date of accommodation 7, Contents of the amendment ( 1) "Brazing" on page 4, line 3 or line 4 of the specification
This has been corrected to read, "The refrigerant passage and the fins forming the cooling air passage are brazed together." (2) “Welding pipes” on the bottom line of page 4 of the specification
Correct the statement to "connect a tank or pipe."

Claims (1)

[Claims] (1) By providing a plurality of thin plates each having a plurality of truncated cone-shaped protrusions with a hole at the top, and joining the plurality of thin plates by overlapping each other with a gap, the protrusions are A heat exchanger characterized in that a fluid passage is formed, and an airflow passage is formed between the plurality of thin plates.