JPH0989473A - Manufacture of plate-fin type heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture heat exchangers having different performance with holding down equipment costs at a required minimum. SOLUTION: In interposing, between a plurality of pairs of square flat plates 15 having fluid-flowing holes 31 provided at both ends, a passage-forming body 24 formed by a square-frame-shaped peripheral wall and a heat-transfer-face- expanding wall portion provided inside of the peripheral wall and having communication spaces 36 provided at both sides, a plurality of the flow passage forming bodies 24 having a length same as the length of the flat plate 15 in a longitudinal direction and widths a sum of which are equal to a traverse width of the flat plate 15 are employed and these bodies are arranged side by side in a traverse direction of the plate 15 in a neighboring relationship with each other between each pair of the flat plates 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a plate / fin heat exchanger used as, for example, an oil cooler or an aftercooler.

[0002]

2. Description of the Related Art As a method of manufacturing a plate-fin heat exchanger of this type, a rectangular frame-shaped peripheral wall and a peripheral wall are formed between a pair of pairs of rectangular flat plates having fluid passage holes at both ends. When interposing the flow path forming member formed by the heat transfer surface enlarging wall portion provided on the inner side and having the communication voids at both ends, the length matches the horizontal length of the flat plate and the width is the front-back direction of the flat plate. It is known that one flow path forming body having the same length is used.

[0003]

In the above heat exchanger, the width of the heat exchanger is, for example, 33, 43, 50, 66, 8
By using 6 types of 6 and 100 mm, 6 types of heat exchangers with different required performances are manufactured.

[0004] In the above, when a higher performance heat exchanger is required, it is necessary to manufacture a wider heat exchanger. In that case, it is necessary to manufacture a flat plate and a flow path forming body having a wide width, which necessitates a new equipment cost. In particular, the flow path forming body is generally manufactured from an aluminum extruded shape material, but the die for extrusion is particularly expensive.

An object of the present invention is to provide a method of manufacturing a plate-fin type heat exchanger capable of manufacturing heat exchangers having different performances with the equipment cost kept to a necessary minimum.

[0006]

According to the method of manufacturing a plate / fin heat exchanger of the present invention, a rectangular frame-shaped peripheral wall is provided between pairs of rectangular flat plates having fluid passage holes at both ends. And when interposing the flow path forming member formed by the heat transfer surface enlarging wall portion provided on the inner side of the peripheral wall and having the communication voids at both ends, the length is equal to the horizontal length of the flat plate and the width is increased. It is characterized in that a plurality of flow path forming bodies whose total length matches the length of the flat plate in the front-rear direction are used, and these are arranged so as to be adjacent to each other with the width in the front-rear direction between the pair of flat plates.

In the method for manufacturing a plate-fin type heat exchanger according to the present invention, a plurality of flow passage forming members whose length is equal to the length of the flat plate in the left-right direction and the sum of the widths is equal to the length of the flat plate in the front-rear direction. Since these are arranged so that the widths are adjacent to each other between the pairs of flat plates in the front-rear direction, the required performance that makes the width different depending on how to combine a plurality of flow passage forming bodies having the same width or different widths. The heat exchanger of is obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to an oil cooler will be described below with reference to the drawings.

In the following description, the front and rear are referred to as the front side on the downstream side in the direction of the wind flow shown by the arrow A in FIG. 1 and the opposite side is the rear side, and the left and right sides are the left and right sides toward the rear. Let's say.

Referring to FIG. 1, the oil cooler comprises a rectangular horizontal flat plate top side flat plate 11 and a bottom side flat plate 12 which are vertically arranged at a predetermined interval, and between these flat plates 11 and 12. 5 wide gaps for forming air passages 13
Further, there are provided eight intermediate flat plates 15 which are arranged so as to alternately form four narrow gaps 14 for forming oil passages and which have the same outer shape as the flat plates 11 and 12.
All of these flat plates 11, 12 and 15 are made of aluminum brazing sheet.

An oil inlet pipe 16 is formed at the center of the right end of the top side flat plate 11, and an oil outlet pipe 17 is formed at the center of the left end thereof so as to project upward.

A corrugated fin 21 and left and right spacers 22 sandwiching the corrugated fin 21 from both left and right sides are inserted into the wide gap 13,
As a result, an air passage 23 extending in the front-rear direction, which is a low temperature fluid passage, is formed. A flow path forming member 24 is provided in the narrow gap 14.
Is inserted, whereby an oil passage 25 extending in the left-right direction, which is a high temperature fluid passage, is formed.

Referring to FIG. 2, corrugated fins 21
There are two in one wide gap 13, and the two corrugated fins 21 have the same width and are arranged side by side adjacent to each other in the front-rear direction. Similarly, the flow path forming body 24 has one narrow gap 14
There are two inside, and the two flow path forming bodies 24 have the same width and are arranged side by side adjacent to each other.

Near the left and right ends of the intermediate flat plate 15, oil passage holes 31 are formed in a rectangular shape that is long in the front-rear direction.

The spacer 22 is made of extruded aluminum and has a rectangular frame shape having a length equal to the length of the intermediate flat plate 15 in the front-rear direction and an oil communication hole 32 matching the oil passage hole 31. It is a thing.

The flow path forming body 24 is made of an aluminum extruded shape member, and has a pair of long bars 33 having a length equal to the length of the intermediate flat plate 15 in the left-right direction and half the length of the intermediate flat plate 15 in the front-rear direction. A peripheral wall (30) integrally formed by a pair of short bars (34) each having a length and a heat transfer surface enlarging wall portion (35) provided inside the peripheral wall (30).

The left and right ends of the heat transfer surface enlarging wall portion 35 are respectively formed with communication voids 36 communicating with the oil passage holes 31. Are formed so that a large number of fins 37 form rows in the front-rear and left-right directions. As shown in FIG. 3, the fins 37 are formed to have a V-shaped cross-section by being cut and raised, and the fins 37 in each row are oriented so that one adjacent one of the fins 37 is turned upside down.

An inclined seam is formed in the middle of the length of the short bar 34.
38 is formed, which is formed in the manufacturing process of the flow path forming body 24. In the manufacturing process, a long bar 33 and a short bar are made by extruding a material extruded into a substantially I-shaped cross section.
While cutting so that the length will be equal to 34, the portions to be the communication gaps 36 are cut and removed leaving the portions to be the bars 33 and 34 of the material, and the portions to be the remaining bars 33 and 34 are opposed to each other. It is bent into a shape and the ends are abutted. By forming the front end surfaces in an inclined shape during the abutting, even if the front end surfaces to be abutted are slightly deviated from each other, no trouble will occur. The butt surface is
It is joined at the time of brazing described later.

When manufacturing the oil cooler, as shown in FIG. 1, a top side flat plate 11, a bottom side flat plate 12, and an intermediate flat plate.
15, corrugated fin 21, spacer 22 and flow path forming body
24 pieces are piled up one after another and put in a furnace and brazed together.

In the illustrated embodiment, two flow passage forming members 24 having the same width are interposed between adjacent ones of the intermediate flat plates 15, but two flow passage forming members having different widths are used. Good. In that case, the sum of the widths of the two flow path forming bodies must be equal to the length of the intermediate flat plate 15 in the front-rear direction.

When using the oil cooler manufactured as described above, as shown by the arrow O in FIG. 2, the oil that has flowed into the oil cooler from the inlet pipe 16 is the oil communication hole 32 of the right spacer 22 and the intermediate flat plate 15. The oil flows downward through the right-side oil passage hole 31 and the right-side communication voids 36 of the front and rear flow path forming bodies 24. A part of the oil that has flowed into the right side communication gap 36 flows from the right to the left in the oil passage 25, and flows out from the left side communication gap 36, as indicated by arrow B. As shown by the arrow I, the oil that has flown out passes through the oil communication hole 32 of the left spacer 22, the left oil passage hole 31 of the intermediate flat plate 15, and the left communication space 36 of the front-rear flow path forming body 24 in order and goes upward. Flow out of the oil cooler through the outlet pipe 17.

Another embodiment is shown in FIGS. In this embodiment, the parts corresponding to those in the above embodiment are designated by the same reference numerals.

The oil cooler according to this embodiment has a top side flat plate 11 and a bottom side flat plate 1 as in the case of the above embodiments.
2, the intermediate flat plate 15, the corrugated fins 21, the spacers 22 and the flow path forming body 24, and has an air passage 23 and an oil passage 25. Only the differences from the above embodiment will be described below.

The top flat plate 11 is not provided with an inlet pipe and an outlet pipe, and the top flat plate 11 is entirely flat. A front oil passage hole 41 and a rear oil passage hole 42 are provided side by side in the front and rear at the right end portion of the intermediate flat plate 15. There is one corrugated fin 21 in one wide gap,
It has the same width as the length of the intermediate flat plate 15 in the front-rear direction. Of the two left and right spacers 22, a partition 43 for partitioning the right spacer 22 into front and rear is provided inside the right spacer 22, and thereby a front oil communication hole 44 and a rear oil communication hole 45 are formed. An oil inlet pipe 16 is provided on the front side wall of the spacer 22 so as to communicate with the front oil communication hole 44, and an oil outlet pipe 17 is provided on the rear side wall of the spacer 22 so as to communicate with the rear oil communication hole 45. .

As shown by the arrow L in FIG. 5, the oil that has flowed into the oil cooler from the inlet pipe 16 is formed by the front oil passage hole 44 of the right spacer 22, the front oil passage hole 41 of the intermediate flat plate 15, and the front passage formation. It flows downward via the right-side communication void 36 of the body 24 in order. A part of the oil that has flowed into the right-side communication space 36 flows from the right to the left in the oil passage 25 and flows out from the left-side communication space 36, as indicated by arrow M. The oil flowing out from the left communication space 36 is inverted in the communication hole 31 of the lower (and / or upper) left spacer 22 as indicated by an arrow N, and left side of the rear flow path forming body 24. It flows into the communication space 36, and this time, as shown by arrow P, flows from the left to the right through the oil passage 25 of the rear flow path forming body 24, and flows out from the right communication space 36. The spilled oil is indicated by the arrow Q.
As shown by, the oil flows upward through the rear oil communication hole 45 of the right spacer 22, the rear passage hole 42 of the intermediate flat plate 15 and the right communication space 36 of the rear flow path forming body 24, and the outlet pipe. It flows out of the oil cooler from 17.

FIG. 6 shows a modification of the spacer. This modification is applied to both of the above two embodiments.

A long spacer 52 is provided on the left side of the fin 51, and two partition walls 53 for partitioning the long spacer 52 into three spaces in the front-rear direction are provided in the hollow interior thereof, whereby the spacer 52 is reinforced. Has been fulfilled. On the right side of the fin 51, two short spacers 54 are arranged side by side in the front and rear. In terms of extrusion molding, the short spacer 54 has a cost advantage over the large spacer 52.

[0028]

According to the present invention, heat exchangers having different performances can be manufactured with the equipment cost kept to a necessary minimum.

[Brief description of drawings]

FIG. 1 is an external perspective view of a heat exchanger according to the present invention.

FIG. 2 is an exploded perspective view of the heat exchanger.

FIG. 3 is an enlarged vertical sectional view showing a fluid passage portion of the heat exchanger.

FIG. 4 is an external perspective view of a heat exchanger showing another embodiment.

FIG. 5 is an exploded perspective view of the heat exchanger.

FIG. 6 is a perspective view showing a modified example of the flow path forming body of the heat exchange tube.

[Explanation of symbols]

 11 Flat plate 24 Flow path forming body 30 Flow path forming body peripheral wall 31 Fluid passage hole 35 Heat transfer surface expansion wall portion 36 Circulation void

Claims (1)

[Claims] 1. A rectangular frame-shaped peripheral wall 30 is provided between a pair of rectangular flat plates 15 having fluid passage holes 31 at both ends thereof, and a communication space 36 is provided at both ends thereof. When interposing the flow path forming body 24 formed by the wall portion 35 for enlarging the heat transfer surface, the length matches the horizontal length of the flat plate 15 and the sum of the widths matches the front-back length of the flat plate 15. A plurality of flow path forming bodies
24. The method for producing a plate-fin heat exchanger, characterized in that 24 are used and they are arranged so as to be adjacent to each other between the pair of flat plates 15 in the front-rear direction.