JPH09280766A - Roll bond panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light roll bond panel in which water can be used as working fluid. SOLUTION: This roll bond panel 1 comprises two aluminium plates 11 forming the front and back sides of the panel 1 and two copper plates 12 sandwiched between the plates 11 and slightly larger than the pattern of a tubular swelling part 2 to be formed in the panel 1 which form laminated plates 1A. The tubular swelling parts 2 are formed on the laminated plates 1A with both copper plate 12 parts used as an inner wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll bond panel used as a heat exchanger such as an evaporator in a refrigerator or an air conditioner.

In this specification, the term "aluminum" includes an aluminum alloy in addition to aluminum, and similarly, the term "copper" includes a copper alloy in addition to copper.

[0003]

2. Description of the Related Art Conventionally, a roll-bonded panel is known in which a laminated plate is formed by two aluminum plates constituting the front and back sides of the panel, and a tubular bulge is formed on the laminated plate. Has been. This aluminum roll bond panel has excellent heat exchange efficiency,
Since the fluid flow channel has a high degree of freedom in design, is lightweight, can be manufactured at low cost, and is also excellent in mass productivity,
It has been widely used as a refrigerator evaporator and heat pipe panel. In particular, since the heat pipe panel has a characteristic of transmitting heat in a planar manner, the number of cases where the heat pipe panel is used for the purpose of radiating localized heat generation or soaking is increasing.

[0004]

However, when the above-mentioned conventional roll bond panel is used as a heat exchanger, it has compatibility with aluminum as a working fluid such as a refrigerant flowing through the tubular bulging portion. Only CFCs could be practically used. That is, the working fluids other than the CFCs are hardly used because they have problems in safety, stability, thermal performance and the like.

Since the surface tension and the latent heat of vaporization of these CFCs are not so large, particularly in the case of a heat pipe panel using CFCs as a working fluid, it was not always possible to exhibit sufficient performance.

As a working fluid, it is generally known that water is superior to CFCs.
Water has a large surface tension and latent heat of vaporization as compared with CFCs, and especially when used as a working fluid for heat pipe panels, water with high surface tension forms a meniscus at the edge of the tubular bulge. This is because the wicking action works and the performance is improved.

Therefore, as a heat exchanger required to be small in size and high in performance, a heat pipe made of copper having excellent corrosion resistance to water has been used. Similarly, if a roll bond panel using a copper laminated plate instead of an aluminum laminated plate is produced, a high-performance heat pipe panel that can use water as a working fluid can be obtained, but the density of copper is the same as that of aluminum. Since it is 3 times or more, there is a problem that the whole weight becomes very heavy, which is not practical.

An object of the present invention is to solve the above problems.

[0009]

In order to solve the above-mentioned problems, the roll-bonded panel of the present invention has two aluminum plates constituting the front and back sides of the panel and is sandwiched between these aluminum plates and formed on the panel. The laminated plate is formed by two copper plates which are slightly larger than the pattern of the tubular bulging portion to be formed, and the tubular bulged portion having both copper plate portions as inner walls is formed on the laminated plate.

Therefore, it is only the copper plate portion constituting the inner wall of the tubular bulging portion that comes into contact with the working fluid, and the aluminum plate and the working fluid never come into contact with each other. Therefore, it is practical to use water as the working fluid. It becomes possible. Moreover, since most of the panel is composed of two aluminum plates, the entire panel can be made relatively light in weight, which is not so different from that of the conventional aluminum roll-bonded panel.

Here, in the roll bond panel, it is preferable that the thickness of the two copper plate portions is not more than half the thickness of the entire panel. As a result, the weight of the entire panel can be reduced.

In the present invention, a copper plate excellent in corrosion resistance against water is used, but instead of this, it is also possible to use other corrosion-resistant metal plates such as cupro nickel.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 5 shows the entire roll bond panel according to the present invention. In the figure, the roll bond panel is shown.
(1) consists of a laminated plate (1A) which has a substantially horizontal rectangle as a whole and has a tubular tubular bulge (2).

The laminated plate (1A) is composed of two aluminum plates (11) constituting the front and back sides of the panel (1) and a tubular bulge (which is sandwiched between these aluminum plates and formed on the panel (1)). 2)
It is formed by two copper plates (12) which are slightly larger than the pattern.

The aluminum plate (11) has a horizontal rectangular shape. The copper plate (12) has a rectangular fluid pressure introducing projection (12a) at the center of the left side of a horizontal rectangle that is slightly smaller than the aluminum plate (11). The thickness of the copper plate (12) may be substantially the same as the thickness of the aluminum plate (11), but is preferably thinner than that. That is, the thickness of the two copper plates (12) in the laminated plate (1A) is
A) It is less than half of the total thickness. This allows
The roll bond panel (1) can be made relatively lightweight. However, if the copper plate (12) is too thin,
In the process of manufacturing the roll bond panel (1) described later, when the fluid pressure is introduced into the non-compression bonding part (4) of the laminated plate (1A) to form the tubular bulging part (2), the copper plate (12) It is considered preferable that the thickness of the copper plate (12) is 0.01 mm or more because the portion may be broken.

The tubular bulging portion (2) has four left and right linear portions (2a) parallel to each other, and one ends of these are communicated with each other.
The front-back straight part of the book (2b), and the left front-back straight part (2b)
From the laminated plate (1A) to the left side of the fluid pressure introducing straight line portion (2c) of the circuit-like, the inner wall is composed entirely of the laminated plate (1A) copper plate (12) part ing. Therefore, even in the case of flowing water as a working fluid into the tubular bulging portion (2), only the copper plate (12) excellent in corrosion resistance against the water is in contact with the water, and the water and the outer aluminum plate ( 11) Since there is no contact with the part,
Excellent in safety, stability and thermal performance.

The tubular bulging portion (2) may be bulged in both upper and lower sides as shown in FIG. 6, or may be bulged only in the upper side as shown in FIG. The bulging shape of the tubular bulging portion (2) may be a convex arc shape as shown in FIGS. 6 and 7, or may be a trapezoidal shape or an inverted U shape.

Next, an example of a method for manufacturing the roll bond panel (1) will be described with reference to FIGS.

First, a predetermined pattern (3) is printed on one surface of one of the two copper plates (12) by using a pressure-preventing agent (see FIG. 1).

Then, the other copper plate (12) is superposed on the printed surface of the one copper plate (12), and these are rolled to obtain a copper laminated plate (12A) having a non-pressed portion (4) ( See FIG. 2).

Next, the aluminum plates (11) are superposed on both sides of the copper laminated plate (12A) (see FIG. 3) and rolled to form the copper-aluminum laminated plate (1).
A) is obtained (see FIG. 4).

Non-pressed part (4) of the obtained laminated plate (1A)
Then, a fluid pressure such as compressed air is introduced from the fluid pressure inlet port (4a) through the pipe to bulge the same portion (4) into a tubular shape to form the tubular bulging portion (2). (See FIG. 5).

Thus, the roll bond panel (1) comprising the laminated plate (1A) having the tubular bulging portion (2) having the inner walls of both copper plates (12) is obtained (see FIGS. 5 to 7).

[0025]

EXAMPLE A roll-bonded panel (1) according to the present invention was manufactured in the following manner (see FIGS. 1 to 7).

First, two C1220 plates (12) each having a length of 20 mm, a width of 250 mm, and a thickness of 0.5 mm were prepared, and one of these plates had a shape similar to that shown in FIG. Printed pattern (3). Where the pattern (3)
The length of the left and right straight parts is 200mm and the width is 1
It is set to 0 mm. And these C1220 plates
(12) is cold-rolled at a rolling reduction of 60% to obtain a C1220 laminated plate (12) having a non-bonded portion (4) corresponding to the pattern (3).
A) was obtained (see FIG. 2).

Next, two aluminum plates (11) having a length of 100 mm, a width of 300 mm and a thickness of 1.3 mm were prepared, and a C1220 laminated plate (12A) was interposed between them,
Both aluminum plates (11) and C1220 laminated plate (12A)
Was hot-rolled at a reduction rate of 60% to obtain a C1220-aluminum laminated sheet (1A) (see FIGS. 3 and 4).

After that, the tubular bulging portion (2) is formed on the C1220-aluminum laminated plate (1A) by using a commonly known inflation tube method (see the section of the embodiment of the invention), and the roll bond panel ( 1) got

Roll bond panel (1) thus obtained
Was cut at a plane crossing the tubular bulge (2), and the state of formation of the tubular bulge (2) was observed.
Each inner wall of (2) consisted of only two C1220 plates (12).

Further, the weight of the roll bond panel (1) was measured and compared with the weight of the roll bond panel (1) made of an aluminum laminated plate and having the same dimensions. (1) was heavier by 45 g.

[0031]

According to the roll bond panel of the present invention,
Only the copper plate portion forming the inner wall of the tubular swelling portion comes into contact with the working fluid, and the aluminum plate and the working fluid never come into contact with each other. Therefore, it is substantially possible to use water as the working fluid. Moreover, many parts of the panel are 2
Since it is composed of a single aluminum plate, the entire panel can be made relatively light in weight, which is not so different from that of the conventional aluminum roll-bonded panel, which is practical.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a process for manufacturing a roll bond panel according to the present invention.

FIG. 2 is a perspective view showing a part of the manufacturing process of the roll bond panel.

FIG. 3 is a perspective view showing a part of a process for manufacturing a roll bond panel.

FIG. 4 is a perspective view showing a part of the manufacturing process of the roll bond panel.

FIG. 5 is a perspective view showing an embodiment of a roll bond panel according to the present invention.

FIG. 6 is an enlarged cross-sectional view showing a tubular bulging portion of a roll bond panel.

FIG. 7 is an enlarged cross-sectional view showing a modified example of the tubular bulging portion of the roll bond panel.

[Explanation of symbols] (1) ... Roll bond panel (1A) ... Laminating plate (2) ... Tubular bulge (11) ... Aluminum plate (12) ... Copper plate

Claims (1)

[Claims] 1. A laminated plate is formed by two aluminum plates constituting both front and back sides of a panel and two copper plates sandwiched between them and slightly larger than a pattern of tubular bulging portions to be formed in the panel. At the same time, a roll-bonded panel is formed by forming a tubular bulge portion having inner walls of both copper plate portions on the laminated plate.