JPH11277167A - Roll bond panel and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrally form condenser, evaporator, capillary tube, etc., having, for instance, refrigerant paths with different sizes in a sheet of panel. SOLUTION: In this manufacturing method, by providing the roll bond panel stock having continuous plural scheduled parts for swelling a tube, having different heights at the time of swelling the tube between the bolsters 1a and 1b of a press, by setting the interval of the bolsters 1a and 1b of the press to a first distance, and by filling the scheduled part for swelling the tube with high-pressure fluid, a swelled tube part 105 with a first height, is formed. Further, by setting the interval of the bolsters 1a and 1b to a second distance higher than the first distance, and by filling the scheduled part for swelling the tube with the high-pressure fluid, while maintaining the swelled tube part 105 with the first height as it is, swelled tube parts 103 and 107 with second heights higher than this first height, are formed.

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 for a heat exchanger incorporated in a refrigerator, a showcase or the like, and a method of manufacturing the same.

[0002]

2. Description of the Related Art In a refrigerant circuit constituting a refrigerating cycle of a refrigerator or the like, it is generally known that a condenser, a capillary tube, an evaporator and the like are connected by a refrigerant tube. When manufacturing this type of refrigeration cycle, for example, it is common to separately manufacture, for example, a condenser, a capillary tube, an evaporator, and the like, and connect them with a refrigerant pipe.

However, when these are manufactured individually, the number of parts increases, the parts management becomes difficult, and the number of points connected by the refrigerant pipe increases, so that the refrigerant leaks easily from a weld or the like. There's a problem.

In order to solve this problem, it has been proposed to manufacture a heat exchanger such as a condenser and an evaporator, a refrigerant pipe and the like by using a single roll bond panel.

[0005] However, compared with heat exchangers such as condensers and evaporators, it is necessary to make the refrigerant passage narrower in a capillary tube or the like.

[0006]

Conventionally, in order to form a refrigerant passage in a roll bond panel, an aluminum roll bond panel is sandwiched between bolsters of a press, and expansion is performed with the dimensions between the bolsters being fixed. High-pressure air is sealed in the scheduled pipe section (for example, see Japanese Patent Publication No. 44-16786). In this conventional manufacturing method, it is not possible to form a plurality of continuous expansion tubes having different heights on one panel, and therefore, a condenser, an evaporator, and a capillary tube having different refrigerant passage sizes. Etc. cannot be integrally formed on one panel.

Accordingly, an object of the present invention is to provide a roll bond panel in which, for example, a condenser, an evaporator, a capillary tube and the like having refrigerant passages of different sizes can be integrally formed on a single panel, and a method of manufacturing the same. Is to do.

[0008]

According to the first aspect of the present invention,
A plurality of continuous inflated tube portions having different heights are formed for one panel.

According to a second aspect of the present invention, a roll bond panel material having a plurality of continuous inflatable portions having different heights when inflated is provided between the bolsters of the press, and the first distance is set between the bolsters of the press. A high-pressure fluid is sealed in the planned inflation portion to form a first-height inflatable portion, and the high-pressure fluid is set in the planned inflation portion by setting a second distance between the bolsters higher than the first distance. The method is characterized in that the inflated tube portion having the second height higher than the first height is formed while enclosing the inflated tube portion having the first height.

According to these inventions, since a plurality of continuous inflated portions having different heights can be formed, a refrigeration cycle in which, for example, a condenser, a capillary tube, an evaporator and the like are continuous can be manufactured with the same roll bond panel.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a roll bond panel. The roll bond panel 100 constitutes a refrigerant circuit of a refrigeration cycle in a refrigerator, for example, and includes a connection port 101 connected to a compressor not shown. The connection port 101 is connected to a first expanded tube 103 constituting a condenser, and the first expanded tube 103 is connected to a second expanded tube 105 forming a capillary tube. The second expanded tube portion 105 is connected to the fourth expanded tube portion 109 and the fifth expanded tube portion 111 forming an evaporator via a third expanded tube portion 107 forming a refrigerant passage.
Are connected. The fifth expansion pipe 111 communicates with a connection port 115 connected to a suction port of the compressor via a sixth expansion pipe 113 forming a refrigerant passage.

The roll bond panel 100 is prepared by preparing two aluminum flat plates, applying an anti-pressing agent to the surface of one aluminum plate, overlaying the other aluminum plate on top of it, rolling the two, and applying the anti-pressing agent. High-pressure air is introduced into the painted portion (planned portion to be expanded) to expand the expanded portion on one side or both sides of the panel to form a refrigerant passage.

2 to 4 show a manufacturing procedure according to this embodiment.

As shown in FIG. 2, the basic manufacturing apparatus includes an upper bolster 1a and a lower bolster 1b constituting a press. In this embodiment, referring to FIG. 1, a plurality of inflated portions are formed in a single roll bond panel 100, and the height of the second inflated portion 105 among these inflated portions is different from that of other inflated portions. It is formed lower than the height of the bulging portion. This is because the second bulging portion 105 forms a capillary tube.

In this embodiment, as shown in FIG. 2, a roll bond panel material 100A having a plurality of continuous inflatable portions A having different heights at the time of inflation between bolsters 1a and 1b constituting a press. Is placed.

First, as shown in FIG. 3, the distance between the bolsters 1a and 1b constituting the press is the first distance L1.
And a high-pressure fluid (high-pressure air) is sealed in the portion A to be expanded. Thereby, the second inflatable tube portion 10 having the first height H1 (for example, 0.3 mm) constituting the capillary tube is formed.
5 are formed. Since the width dimension W1 of the inflatable tube portion 105 is small, for example, 1.5 to 3 mm, the inflatable tube cannot be expanded unless the fluid has a considerably high pressure. Therefore, in this case, high-pressure air of, for example, 150 to 160 kg / cm ² , which is considerably higher than the normal pressure, is filled. This stage is a pre-expansion tube.

However, for example, the first expanded tube portion 10
When the cross-sectional area of the third and fourth inflatable tube portions 109 is large,
If the internal pressure of the inflated tube portion is too high, the inflated tube portion is likely to be broken. In this embodiment, the bolster 1
Since the distance between a and 1b is adjusted to the first distance L1, even if the internal pressure of the inflated tube portions 103 and 109 is higher than usual, the inflated tube portions 103 and 109 do not break.

Next, as shown in FIG.
The distance between a and 1b is adjusted to the second distance L2, and high-pressure air having a normal pressure of 100 to 120 kg / cm ² is sealed in the portion A to be expanded. Thereby, the second height H2 (for example, 3.
2 mm) are formed. In this case, the second inflatable tube portion 1 constituting the capillary tube
05 remains low in height as it is no longer inflated.

The width W of the first inflatable tube 103 (condenser)
2 is, for example, 4 to 7 mm, and the width dimension W3 of the fourth inflatable tube 109 (evaporator) is, for example, 7 to 12 mm.

In this embodiment, the first height L is set by setting the first distance L1 between the bolsters 1a and 1b of the press and filling a relatively high pressure fluid in the portion A to be expanded.
One bulging portion 105 is formed, and then the bolsters 1a, 1
b is set to a second distance L2 higher than the first distance L1, and a relatively low-pressure fluid is sealed in the portion A to be inflated, so that the shape of the inflated portion 105 having the first height H1 remains unchanged.膨 While maintaining, the expanded tube portions 103 and 109 having the second height H2 higher than the first height H1 are formed. It can be manufactured with the bond panel 100.

Therefore, it is not necessary to separately manufacture a condenser, a capillary tube, an evaporator, etc. and connect them with a refrigerant pipe as in the prior art, so that the number of parts in forming a refrigeration cycle is reduced, and Since the management becomes easy and there is no place to be connected by the refrigerant pipe, the occurrence of refrigerant leakage is greatly suppressed.

Although the present invention has been described based on one embodiment, it is clear that the present invention is not limited to this.

In the above-described embodiment, the case where a refrigeration cycle is configured has been described. However, the present invention is not limited to this. For example, the present invention can be applied to a case where a heat pipe or the like using the roll bond panel 100 is manufactured. Needless to say.

Also, while the roll bond panel 100 having the pre-expandable portion A on both sides of the panel has been described, it is apparent that the present invention can be applied to a panel having the pre-expandable portion A on only one side of the panel.

[0026]

As is apparent from the above description, according to the present invention, a plurality of continuous inflation tubes having different heights can be formed, and thus, for example, a condenser, a capillary tube, an evaporator, etc., in which freezing is continuous. Cycles can be manufactured on the same roll bond panel.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a manufacturing step of the roll bond panel.

FIG. 3 is a cross-sectional view showing the same manufacturing stage.

FIG. 4 is a cross-sectional view showing the same manufacturing stage.

[Explanation of symbols]

 1a, 1b Bolster 100 Roll bond panel 103 First inflatable tube (condenser) 105 Second inflatable tube (capillary tube) 107 Third inflatable tube 109 Fourth inflatable tube (evaporator) 111 Fifth inflation part 113 Sixth inflation part

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI F25B 39/04 F25B 39/04 GR 41/06 41/06 D F28F 3/14 F28F 3/14 Z

Claims (2)

[Claims] 1. A roll bond panel wherein a plurality of continuous inflated portions having different heights are formed for one panel. 2. A roll bond panel material having a plurality of continuous portions to be inflated with different heights when inflated between bolsters of a press, wherein the bolsters of the press are set at a first distance. A high-pressure fluid is sealed in the scheduled portion to form a bulging portion having a first height, and the bolsters are set at a second distance higher than the first distance to seal the high-pressure fluid in the swelling portion. Forming the expanded tube portion having a second height higher than the first height while maintaining the expanded tube portion at the first height.