JPH05113296A - Manufacture of heat exchanger with honeycomb-shaped fin - Google Patents

Abstract

PURPOSE:To connect a honeycomb-shaped fin to a tube without deformation, etc., by pulling a laminate made of a metal foil and the tube in a laminating direction, thereby forming the fin without deforming the foil. CONSTITUTION:Many aluminum foils 1 are laminated on both upper and lower surfaces of a tube layer 4 made of one flat aluminum tube 2a. Adhering parts 6 and nonadhering parts 7 are so connected as to be alternately formed between the adjacent foils 1 and between the foils 1 and the tube 2a to form a laminate 5. Then, the laminate 5 is pulled in a laminating direction thereby to deform the foil 1, thereby forming a honeycomb-shaped fin 3 having diamond openings coupled integrally with the tube 2a. Thus, the fin 3 can be connected to the tube 2a without deformation, collapse, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a heat exchanger with a honeycomb fin made of, for example, aluminum.

[0002]

2. Description of the Related Art It is well known that an aluminum heat exchanger having a combination of honeycomb fins and tubes has a high heat transfer efficiency.

[0003]

However, in the conventional heat exchanger of this type, a combination of a preformed honeycomb fin and a tube is used, and a part of the honeycomb fin is deformed by press working to form a tube. As the contact surface with the fins is taken, the honeycomb fin may be distorted or crushed, and a sufficient contact area cannot be secured. However, there is a problem in that it has not yet achieved high heat transfer efficiency.

The object of the present invention is to solve the above-mentioned problems of the prior art, and the honeycomb fins can be joined to the tube without causing distortion, crushing, etc. of the honeycomb fins made of metal foil, and moreover, the honeycomb. Provided is a method of manufacturing a heat exchanger with a honeycomb fin, which can secure a sufficient contact surface between the shaped fin and the tube, does not cause defective joints, and can exhibit high heat transfer efficiency. There is to try.

[0005]

In order to achieve the above object, the present invention provides at least one of the upper and lower sides of one flat metal tube or a plurality of metal tubes arranged in parallel, A large number of honeycomb-shaped fin-forming metal foils are stacked, and these are arranged so that adhesive portions and non-adhesive portions are alternately formed between adjacent metal foils and between the metal foil and the metal tube. Bonding to form a laminated body, and then pulling the laminated body in the laminating direction to deform the metal foil to form a honeycomb-shaped fin integrally bonded with the metal tube, the honeycomb. The main point is the manufacturing method of the heat exchanger with a fin.

In the above description, one metal tube may be used if it is a flat tube having a required wide width, and if it is a tube having a relatively narrow width such as a rectangular tube or a circular tube, these may be used. Plural pieces are arranged in parallel. Further, in the case of a circular tube, a spacer having a predetermined shape is interposed between adjacent tubes so that the upper and lower surfaces of a tube layer in which circular tubes and spacers are alternately arranged are flat. ,desirable.

As the metal foil and the metal tube,
For example, those made of aluminum or aluminum alloy, or copper or copper alloy, or other metal can be used.

As the above-mentioned adhesive, liquid or film-like one is used, and as the resin system, for example, epoxy resin, phenol resin, polyimide resin, rubber or the like is used. In the case of liquid adhesives, either the roll coater method, the spray method, or the hand-painting method can be used to bond between the adjacent metal foils, and between the metal foil and the metal tube. Apply so that and are alternately formed. In the case of a film adhesive, the film adhesive cut into a required width is placed on the surfaces of the metal foil and the metal tube so that the adhesive portions and the non-adhesive portions are alternately formed. In this case, by appropriately changing the bonding width between the metal foil and the metal tube,
The contact area between the two can be freely changed, and the cross-sectional shape of the honeycomb fin can be freely changed by appropriately changing the application width and pitch of the adhesive.

The number of metal foils to be laminated is of course determined by the size of the honeycomb fin to be formed, and the metal tube layer may be one layer or a plurality of layers at predetermined intervals.

[0010]

According to the above method for manufacturing the heat exchanger with the honeycomb fin, the metal foil and the tube are combined in a laminated shape without forming only the metal foil into the honeycomb fin first, and then the laminated body is formed. By pulling in the stacking direction, the metal foil is deformed to form the honeycomb fin, so that the honeycomb fin can be bonded to the tube without being distorted or crushed. In addition, since the metal tube and the metal foil adjacent to the metal tube are already integrally combined in the laminating step before forming the honeycomb fin, the contact surface between the honeycomb fin and the tube is surely formed. Therefore, it is possible to achieve good heat transfer efficiency without causing joint failure and since the contact area between the fin and the tube is sufficiently large.

[0011]

Embodiments of the present invention will now be described with reference to the drawings.

Embodiment 1 Referring to FIGS. 1 and 2 showing a first embodiment of the present invention, a method for manufacturing a honeycomb-shaped finned heat exchanger (10) according to the present invention is as follows. A large number of honeycomb-shaped fin-forming aluminum foils (1) are stacked on the upper and lower sides of the tube layer (4) consisting of flat aluminum tubes (2a) made of sewing pipe, and adjacent aluminum foils are stacked.
(1) (1) Between each other and between the aluminum foil (1) and the aluminum tube (2a), the adhesive part (6) and the non-adhesive part (7) made by epoxy resin adhesive are alternately and alternately formed. These are joined so as to be formed in a direction perpendicular to the length direction of the tube (2a), and pressed at this stage by pressing to form a laminated body (5) (see FIG. 1).

Next, by pulling this laminated body (5) in the laminating direction, the aluminum foil (1) is deformed, and a honeycomb fin (3) having a diamond opening integrally combined with the aluminum tube (2a) is formed. Are formed (see FIG. 2).

The honeycomb-shaped fin-equipped heat exchanger (10) thus formed has a fluid such as air passing through the honeycomb fin (3) and a fluid such as a refrigerant passing through the aluminum tube (2a). However, it is a so-called direct current.

Further, after the aluminum foil (1) and the flat aluminum tube (2a) are combined in a laminated manner in this manner, the laminated body (5) is pulled in the laminating direction to form the honeycomb fins (3). Since it is formed, the formed fins (3) are not distorted or crushed.
Therefore, since the honeycomb fin (3) has a substantially perfect honeycomb shape, the resistance to fluid such as air passing through the fin (3) can be suppressed low.

The aluminum tube (2a) and the aluminum foil (1) adjacent to the aluminum tube (2a) are honeycomb fins.
Since the honeycomb fins (3) and the tubes (2a) have already been joined together in the stacking step before forming (3), a sufficient contact surface between the honeycomb fins (3) and the tubes (2a) can be secured, and the obtained honeycomb fins can be obtained. The attached heat exchanger (10) exhibits high heat transfer efficiency and can significantly improve heat exchange performance.

If the aluminum foil (1) adjacent to the aluminum tube (2a) is joined in a flat state, it will be difficult to secure the elongation during stretch forming, that is, the so-called elongation margin cannot be secured. The aluminum foil (1) is pre-wrinkled to form wrinkles on the part that will become the non-bonded part (7).
It is desirable to enlarge the wrinkles of (7).

Embodiment 2 FIGS. 3 and 4 show a second embodiment of the present invention. Here, the point different from the case of the first embodiment is that, as the tube layer (4), a large number of aluminum tubes (2b) having a substantially hexagonal cross section are arranged in parallel and the tube layer (4) 4) is provided on the upper and lower sides, and in each layer, the adhesive part (6) is provided between the adjacent aluminum foils (1) and (1) and between the aluminum foil (1) and the aluminum tube (2b). And the non-bonded part (7) alternately and
The point is that the heat exchanger with honeycomb fins (10) is formed by being provided in parallel with the length direction of (2b) and expanding by stretching.

The honeycomb-shaped fin-equipped heat exchanger (10) thus formed has a fluid such as air passing through the honeycomb-shaped fin (3) and a fluid such as a refrigerant passing through the aluminum tube (2b). Can be a so-called counter flow, and has excellent heat exchange performance.

Embodiment 3 FIGS. 5 and 6 show a third embodiment of the present invention. Here, the difference from the case of the first embodiment is that, as the tube layer (4), a large number of aluminum tubes (2b) having circular cross-sections arranged in parallel are used, and adjacent circular tubes. Between the aluminum tubes (2b) and (2b), a circular aluminum tube (2b) and a circular tube (2b) with a spacer (8) made of an extruded aluminum material having a predetermined shape and having substantially the same height as the circular tube (2b). The upper and lower surfaces of the tube layer (4) in which the spacers (8) are alternately arranged are flat.

The honeycomb finned heat exchanger (10) formed in the third embodiment is of the so-called direct flow type as in the case of the first embodiment.

Since the other points of the second and third embodiments are the same as those of the first embodiment described above, the same parts are designated by the same reference numerals in the drawings.

In each of the above embodiments, the tube layer (4) consisting of one flat aluminum tube (2a) or hexagonal tubes arranged in parallel or circular aluminum tubes (2b) is placed above and below. Aluminum foil (1) is stacked on both sides to form honeycomb-shaped fins (3) integrally bonded to these on the upper and lower sides of the tube layer (4), but also on one side of the tube layer (4). In some cases, aluminum foils (1) are stacked on top of each other to form honeycomb fins (3).

[0024]

As described above, in the method for manufacturing the heat exchanger with the honeycomb fins according to the present invention, at least one of the upper and lower sides of one flat metal tube or a plurality of metal tubes arranged in parallel is used. A large number of honeycomb-shaped fin-forming metal foils are stacked on one side so that adhesive portions and non-adhesive portions are alternately formed between adjacent metal foils and between the metal foil and the metal tube. , And these are joined to form a laminated body, and then the laminated body is pulled in the laminating direction to deform the metal foil, thereby forming a honeycomb fin integrally joined with the metal tube. According to the method of the present invention,
After forming the metal foil and the tube in a laminated shape without forming only the metal foil into the honeycomb fin first,
Since the honeycomb-shaped fin is formed, the honeycomb-shaped fin can be firmly bonded to the tube without being distorted or crushed. In addition, since the metal tube and the metal foil adjacent to the metal tube are already integrally bonded at the laminating step before forming the honeycomb fin, the contact surface between the honeycomb fin and the tube can be reliably formed. As a result, it is possible to achieve high heat transfer efficiency without causing joint failure and since the contact area between the fin and the tube is sufficiently large.

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated body including a flat tubular tube and a large number of aluminum foils in a first embodiment of the present invention, showing a state before the aluminum foils are stretched and expanded.

FIG. 2 is an enlarged cross-sectional view of a main part of a heat exchanger with a honeycomb fin formed of the laminated body of FIG.

FIG. 3 is a perspective view of a laminated body including a parallel hexagonal tube and a large number of aluminum foils in a second embodiment of the present invention, showing a state before the aluminum foils are stretched and expanded.

FIG. 4 is an enlarged cross-sectional view of an essential part of a heat exchanger with a honeycomb fin formed of the laminated body of FIG.

FIG. 5 is a perspective view of a laminated body composed of parallel circular tubes and spacers and a large number of aluminum foils in a third embodiment of the present invention, showing a state before the aluminum foils are stretched and expanded.

FIG. 6 is an enlarged cross-sectional view of a main part of a heat exchanger with a honeycomb fin formed of the laminated body of FIG.

[Explanation of symbols]

1 Honeycomb Fin Forming Aluminum Foil (Metal Foil) 2a Flat Tubular Aluminum Tube (Metal Tube) 2b Hexagonal or Circular Aluminum Tube (Metal Tube) 3 Honeycomb Fin 4 Tube Layer 5 Laminated Body 6 Adhesive Part 7 Non-bonding part 8 Spacer 10 Honeycomb finned heat exchanger

Claims (1)

[Claims] 1. A large number of honeycomb-shaped fin-forming metal foils (1) on at least one of the upper and lower sides of one flat metal tube (2a) or a plurality of metal tubes (2b) arranged in parallel. ) Are stacked on top of each other, and between the adjacent metal foils (1) and (1), and between the metal foil (1) and the metal tubes (2a) and (2b), the adhesive part (6) and the non-adhesive part (7), respectively. ) And are alternately formed to form a laminate (5), and then the laminate (5) is pulled in the laminating direction to deform the metal foil (1). , Metal tube (2a) (2
A method for manufacturing a heat exchanger with a honeycomb fin, which comprises forming a honeycomb fin (3) integrally bonded with b).