JPS61283428A - Manufacture of heat exchanger - Google Patents

Abstract

PURPOSE:To form a heat exchanger having an excellent performance by putting metal pipes on a wavy metal plate to figure a snaky line, then putting a thin metal plate having an adherent layer on the metal pipes, and pressing them down using a press plate capable of deforming elastically. CONSTITUTION:A thin flat metal plate 3 having a parting sheet 5 such as paper and an adherent layer 4 is formed into a wavy shape having many projections and recesses. Metal pipes 2 having a diameter N and a length shorter than the distance M between a crest 3A and an adjacent crest 3A or a recess 3B and an adjacent recess 3B of the wavy metal plate 3 are put on a thin metal plate 1 such as Al to figure a snaky line. The metal pipes 2 are bent and arranged so that the space P between parallel metal pipes 2 is larger than the distance Q between a crest 3A and a recess 3B of the plate 3. After the parting sheet 5 is torn from the plate 3, the plate 3 is put on the pipes 2 and pressed with an elastically deformable pressing plate 7 such as urethane rubber so that the plate 3 adheres and fixes to the pipes 2 and plate 1 by the adherent layer 4 to form a heat exchanger having an excellent performance.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a method for manufacturing a plate-shaped heat exchanger called a pipe-on-sheet or tube-on-sheet.

(b) Conventional technology ■ Japanese Patent Application Laid-Open No. 52-149657 (, TPC69C
In 1), in a heat exchanger in which metal pipes are arranged in a meandering manner on a metal plate, a thin metal plate is provided to cover the metal pipe so that the metal pipe is interposed between the metal plate and the metal plate. The thin metal plate has an adhesive layer on the surface facing the metal pipe and the metal plate, and a slack portion is formed in advance at least in a portion that is stretched between the metal pipe and the metal plate, and the thin metal plate A method of manufacturing a heat exchanger is disclosed in which the slack portion extends along the metal pipe under pressure from an external pressure, and the metal pipe is held on the metal plate.

■ Publication No. 47-27248 (JPC70B25
) includes a cooling pipe that evaporates refrigerant gas inside, a defrosting heater that prevents the cooling pipe from forming, and
The cooling pipe and the defrosting heater are provided with two cooling plates that are integrally fixed to form a cooler body, and an adhesive member interposed between the two cooling plates, and the cooling pipe and the defrosting heater are
A cooler characterized in that the two cooling plates are sandwiched between the two cooling plates by applying pressure or further heating so that they come into close contact with each other, and are fixedly molded together by the adhesive member. ing.

(c) Problems to be Solved by the Invention In the above-mentioned prior art (2), a thin metal plate is used for each straight part of the metal pipe, and after forming a slack part, the thin metal plate is coated with an adhesive on the lower surface. The manufacturing process is complicated, as the adhesive is formed as an adhesive layer, and the metal pipe is temporarily fixed onto the metal plate using a thin metal plate, and then a press operation is performed. In addition, the slack part is meant to prevent damage to the thin metal plate and increase the heat exchange area between the metal pipe and the thin metal plate, so from the point of view of the fixing strength of the metal pipe, the slack part is However, there was also the problem of weakening the fixing strength.

In addition, in the above-mentioned conventional technique (2), when the second aluminum plate is pressurized by the upper mold, a part of the second aluminum plate is stretched along the curved surface of the cooling pipe, so that it covers the cooling pipe. The wall thickness of the part is thin (therefore, when the completed U-shaped plate for the cooler is bent, there is a risk that partial pressure cracks will occur due to the thin wall thickness, and some of the cutout grooves of the upper die are formed at a pitch. Therefore, if the pitch between the cooling pipes is different, a new upper mold must be prepared, and the problem arises that the number of upper molds increases.

In order to solve the above-mentioned problems, the present invention provides an adhesive layer (
4) and a flat metal thin plate equipped with a release sheet (5) (
3) into a waveform with flexure consisting of many peaks (3A) and troughs (3B), and a step of processing the straight metal tube (2
) in a meandering manner, and adjacent and mutually parallel straight line parts (
2A) (2A) The pitch CP) between at least one peak (3A) and one valley (3A) of the corrugated thin metal sheet
A step of bending the metal pipe (2) so that it is longer than the dimension (Q) between B) and the meandering metal tube (2) on the metal plate (1);
A process of placing the peeled metal thin plate (3) on this metal tube, and pressurizing the metal thin plate from above with an elastically deformable pressing plate (force). 3) bonding the heat exchanger to a metal tube (2) and a metal plate (1).

(e) Function The flat metal thin plate (3) is preformed into a corrugated shape with the adhesive (4) and release sheet (5) attached.
When placing the thin metal plate (3) on the metal tube (2), remove the release sheet 5) and cover the metal tube (2) with the thin metal plate (3). Each straight line part (2A)
(2A) at least one apex (3
A) and one trough (3B) are naturally located, and the corrugated thin metal plate (3) and one elastically deformable press plate (
7) by pressurizing each top (3A) (
3A), trough (3B) Gradually reduce the deflection of (3B) and attach the adhesive layer (4) to the metal tube (2) and metal plate +1+
The thin metal plates (3) can be successively bonded via the .

(f) Example The present invention will be described in detail below based on the drawings.

Figure 1 shows heat exchange, in which (1) is a metal plate such as an aluminum plate, and (2) is a metal plate bent in a meandering shape and having a circular cross section placed on the metal plate (1). The tube (3) is a thin metal plate made of a thin plate such as aluminum or copper having an adhesive layer (4) on the surface facing the metal plate (1), and this metal thin plate is attached to the metal plate (1) and the metal plate (3). By adhering to the pipe (2), the metal pipe (2) ) is pressed onto the metal plate (11).

Next, a method for manufacturing the heat exchanger will be explained.

First, as a preliminary step, as shown in Fig. 2, a flat flexible metal thin plate (3) with a release sheet (5) made of paper or plastic covering the adhesive layer (4) is prepared as shown in Fig. 3. While the release sheet (5) is still attached, it is processed and formed into a corrugated shape having a large number of uneven surfaces, that is, wide areas. Just press this wave. The thin metal plate (3) formed into a corrugated shape by such processing is formed between the tops (3A) (3A) or the valleys (3B) (3B).
) is preferably longer than the diameter N of the metal tube (2), and its deflection height 0) is preferably shorter than the diameter N of the metal tube (2), and the release seam) ( 5)?
: It is preferable that the strength is such that the corrugated shape does not undergo significant deformation with the peeling force when applying kJ.

In addition, when bending a straight metal tube (21') in a circular shape, the straight parts (2A) (2A) that are adjacent to each other and parallel to each other are
The pitch (P) between the metal thin plates (3) is preferably longer than the dimension (Q) between any top (3) of the thin metal plate (3) and the valley (3B) adjacent to this top.

The metal tube (2) thus processed and formed is placed on the metal plate (1) placed on the base (6), and then the release sheet (5) is placed on the metal plate (1) placed on the base (6).
After the corrugated thin metal plate (3) from which has been peeled off is placed on the metal tube (2) as shown in Figure 4, it is placed on the metal tube (2) as shown in Figure 5. The pressing plate (pressing with force) that deforms. Along with this pressing, the pressing plate (with force, the thin metal plate (3)
As shown in the figure, the metal plate (1) is deformed and bonded to the adhesive layer (4).
and the metal tube (2), and the metal tube (2) is attached to the metal plate (1).
2) Fix.

To explain in detail the deformation process of the thin metal plate (3) during the press work, the thin metal plate (3) deforms due to the deformation of the press plate (force).
) is brought into close contact with the arcuate surface of the metal tube (2) from the top surface to the side surface, and as this contact progresses, its wavy deflection gradually decreases, and furthermore, the push plate (as the deformation of the force increases, the metal A tensile part (G) is formed in a part of the thin plate (3) that is spaced from the metal tube (2), and finally the thin metal plate (3) has almost no deflection, and most of it is flat on the metal plate (1). In other words, the corrugated thin metal plate (3) is bonded from the top (3A) and trough (3B) spanning between the straight portions (2A) (2A) of the metal tube (2). The metal tube (2) and the metal plate (+11K) are successively bonded together by gradually reducing the multiple deflections caused by pressing.

Therefore, according to the manufacturing method of the heat exchanger, the flat metal thin plate (3) is preformed into a corrugated shape with the adhesive layer (4) and the release sheet (5) attached, so that the metal tube (2)
When placing the thin metal plate (3) on top, use the release sheet (5).
) and covering the metal tube (2) with a thin metal plate (3), at least one apex (3A) and one The trough (3B) is naturally located, and as a result, the work of arranging the thin metal plate (3) becomes extremely easy, and the metal plate (1), metal pipe (2), and metal thin plate (3) are The time for overlapping can be shortened. Also, corrugated thin metal plate (3)
An elastically deformable pressing plate (by applying pressure with force, the deflection of each top (3A) (3A), trough (3B) (3B) is gradually reduced ~ metal tube (2) and metal plate) (1
) can be sequentially bonded to the thin metal plate (3) via the adhesive layer (4), without reducing the thickness of the thin metal plate (3) due to bending, and moreover, it is possible to apply sufficient tensile force 1 to the tensile part (g). The metal tube (2) can be firmly fixed, and since the force itself can be elastically deformed, the pitch T between the straight parts (2A) of the metal tube (2) is different. It is also possible to use a thin metal plate (3) at the adjacent top portions (3A) (3A).
) or adjacent valleys (3B) (3B) By making the pitch M longer than the diameter N of the metal tube (2) (that is, making the deflection thicker), the top part on the metal tube (2) (3A)
Or, no matter where the troughs (3B) are located, the inclined surfaces of the thin metal plate (3) will not adhere to each other and form fin pieces when pressurized by the press plate (7). Pressurizing work becomes smoother and defects can be avoided. Furthermore, a thin metal plate (3
) by making the height 01 shorter than the diameter N of the metal tube (2), it is possible to maintain the forming strength when the release sheet of the thin metal plate (3) is peeled off, and it is possible to maintain the forming strength when the release sheet of the thin metal plate (3) is removed, and also to prevent processing by the press plate (7). When a part of the thin metal plate (3) first passes through the metal plate (IIK)
, it is possible to prevent the metal plate (1) from being adhered to the metal plate (1) before the adhesion, that is, the adhesion to the gold IA tube (2), is completed.

(g) Effects of the invention According to the present invention described above, the following effects are achieved! play.

■ After attaching the adhesive layer and release sheet to the thin metal plate,
Since the metal thin plate is processed from a flat plate to a corrugated shape, when placing the metal thin plate on the metal tube, it is sufficient to use a peeling sheet (Y). This makes the work of arranging the thin metal plates much easier.

■ As the elastically deformable press plate applies pressure, the deflection of the metal thin plate gradually decreases and it is successively bonded to the metal tube and metal plate, so the thin metal plate can be bonded with sufficient tensile force without damaging the thickness of the metal plate. A metal tube can be fixed to a metal plate, and it can also prevent two parts of a thin metal plate from adhering to each other due to pressure.Furthermore, one elastically deformable press plate can handle metal tubes of various shapes. It can be pressurized.

[Brief explanation of the drawing]

The drawings all relate to the manufacturing method of the heat exchanger of the present invention; FIG. 1 is a vertical sectional view of the main part of the heat exchanger obtained by the manufacturing method of the present invention, and FIGS. 2 and 3 are the primary and 4 to 6 show the manufacturing process, FIG. 4 is a plan view of the main part, and FIGS. 5 and 6 are longitudinal sectional views of the main part. (1)...Metal plate, (2)...Metal tube, (2A
)(2A) ・'...straight line part, (3)...metal thin plate, (3A) (3A)...top, (3B)
(3B)... Tanibe, (4)... Adhesive layer, (5)
...Release sheet. Applicant Sanyo Electric Co., Ltd. and 1 other agent Patent attorney Shizuo Sano -=l-t! 1 Figure 2 Figure 3

Claims (3)

[Claims] 1. A process of processing a flat metal thin plate with an adhesive layer and a release sheet on one side into a corrugated shape having many peaks and troughs, and converting a straight metal tube into a meandering shape and adjacent to each other. bending the corrugated thin metal sheet so that the pitch between the mutually parallel linear portions is longer than the dimension between at least one top and one valley of the corrugated metal sheet; a metal tube, a step of placing a metal thin plate with a release sheet removed on the metal tube, and pressurizing the metal thin plate from above with an elastically deformable pressing plate, and forming the metal thin plate into a metal tube and a metal plate. A method for manufacturing a heat exchanger, which includes a step of bonding. 2. 2. The method of manufacturing a heat exchanger according to claim 1, wherein the pitch between adjacent peaks or between adjacent valleys of the thin metal plates is longer than the diameter of the metal tube. 3. A method of manufacturing a heat exchanger according to claims 1 and 2, wherein the height of the deflection of the metal thin plate is made shorter than the diameter of the metal tube.