JPS5895147A - Manufacture of solar heat collecting unit - Google Patents

Abstract

PURPOSE:To fix firmly and easily, by fixing a thermal medium pipe to a heat receiving plate through an intermittently rolling method. CONSTITUTION:A titled method is to joint a heat receiving plate 1, such as an aluminum plate to a thermal medium pipe 2, such as a copper pipe in its axial direction by pressure welding (apressure welding part 3) at regular intervals intermittently, wherein a core metal bar inserted into the thermal medium pipe 2 is welded by pressing strongly by a sharp knife-edge from above the heat receiving plate 1. Now, an auxiliary plate and the heat receiving plate 1 may be welded by pressure intermittently to each other by holding the thermal medium pipe 2 by an auxiliary plate having a hollowed part for insertion of the thermal medium pipe 2.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a fR manufacturing method for a solar heat collector, and
The present invention relates to a method of joining a 1% plate and a heat transfer pipe.

(Technical Background of the Invention) Conventionally, there are the following methods for V-joining the heat receiving plate and the heat Is'i#.

■As shown in Figure 1, a method of caulking and joining the heating medium l#ta to the heat receiving plate.

■As shown in Figure 2, 5 is a method of welding and joining the heat transfer pipe a to the heat receiving plate. - (C in the figure is welding S) ■As shown in Figure 3, the heating medium '#a is
tMethod of heat receiving and heat receiving bonding.

However, each of the above-mentioned conventional techniques has the following drawbacks.

In other words, ■ is usually made of different materials (heating medium fa and heat receiving plate - Cu, heat receiving plate is A).
There are many l), 0! If the temperature changes, there is a risk that the caulking will loosen due to the difference in thermal expansion.When using this heat collector in a vacuum tube, the increase in thermal resistance will be large and the caulking force (sometimes).

■ is the metal between heat transfer pipe a and heat receiving &b (・alloy + d1
For example, if the temperature exceeds about 200°C, there is a risk that the two will separate.

be.

(Objective of the Invention) Therefore, an object of the present invention is to provide a method for manufacturing a solar heat collector that is firmly and easily integrated with a heat medium pipe and a heat receiving plate. It is characterized in that the heat medium pipe and the heat receiving plate are joined by V# continuous pressure welding σ-.

A method of continuously pressing the heat medium tube and the heat receiving plate may be considered, but for example, in a vacuum tube type heat collector, the thickness of the heat receiving plate is 0.4
sm Sohen and Hiroshi, when this is pressed, the shore is 0,1
Since it becomes about 0.15 bran, the heat receiving plate becomes extremely easy to break. Therefore, in the present invention, the pressure welding is performed intermittently to ensure sufficient mechanical security even when the volatility of the heat medium or the heat receiver is reduced. For example, (sufficient mechanical strength of the heat receiving plate and heat transfer pipe after pre-joining can be ensured, (b) concave portions are formed in the heat receiving plate at the same time as pressure welding, so the heat receiving area increases, (
C) The rc# joint does not loosen as in the case of caulking. B) The attachment is strong without forming a brittle alloy layer as in the case of welding. (E) The joint height between the heating medium ψ and the receiver M& It has the advantage of being easy to perform once you have done it.

(Example of the invention) An embodiment of the present invention will be described with reference to FIG.

1 is a heat receiving plate, made of a material such as A4, for example,
Its surface has been subjected to selective absorption 1111 treatment.

The heat medium pipe 2 is made of a copper pipe, and when collecting heat, a heat medium is flowed inside it to collect heat. 2. Pressure-welding is performed at regular intervals in the axial direction of the two parts. (Press contact portion 3 in the figure) This pressure contact is performed, for example, by inserting a rod-shaped mandrel into the heat medium tube 2 and carefully pressing a narrow rectangular shape onto the heat receiving plate 1.

Note that if the pressure welding interval is too large, the thermal resistance will be large (
In other words, as long as the pressure contact area is kept to one foot, there will be no decline in sexual performance. Therefore, if the press-contact portion is made wider, the press-contact interval can be increased proportionally.

Since this embodiment uses the above method, it has the following effects.

■19r Since pressure welding was performed continuously, the heating medium of the welding
t2 and the mechanical strength of the heat receiving plate 1 can be maintained sufficiently.

Since unevenness is formed on the receiving PP 411 at the same time as OJ pressure welding, the thermal resistance increases. In addition, the pressure contact portion has a conductive wall thickness, so the thermal resistance is reduced. Therefore, the heat absorption efficiency is improved.

■Joining the heat medium pipe 2 and the heat receiver &1 can be easily and easily done.

■Unlike the caulking method, there is no risk of the joint loosening due to the use of hot PC.

A brittle alloy layer is not formed between the heat medium *X and the heat receiving plate 2 unlike in the case of Shima welding.

In addition, pressure welding provides a strong bond.

Next, another embodiment is shown in FIG.

In the above-mentioned embodiment, the heating medium '#2 and the heat receiving plate 1 are directly connected to H:
In this example, the Shizusuke temporary 41 which has a concave portion
The heating medium #2 is fixed to the heat receiving plate by pressing the two heat medium pipes onto the heat receiving plate S with the concave part of the sleeve supporter 4 and intermittently press-welding the support &4 and the heat receiving plate 1. , has been established. (3 in the figure is pressure contact S) This embodiment also has the following effects. That is, in this embodiment, there is no need to insert a mandrel inside the heat medium tube 2 as in the previous embodiments, so pressure welding can be carried out very easily. In addition, since the flat plates are pressed together, the pressure of the pressed body increases.

[Brief explanation of the drawing]

Figures 1 to 3 are schematic diagrams of conventional solar heat collectors that are bent over each other, Figure 4 is a schematic diagram of an embodiment of the solar heat collector of the present invention, and Figure 5 is FIG. 3 is a schematic configuration diagram showing another embodiment of the present invention.

Claims (1)

[Claims] A method for manufacturing a solar heat collector, characterized in that a heat medium pipe and a heat receiving plate are identified by an intermittent rolling method.