DE2351920A1 - METHOD OF MANUFACTURING A HEAT EXCHANGER - Google Patents

Description

Ιβ.ΙΟ.1973 7657-IV / part.

Ets. Bonnet, Constructeurs , Villefranche-Sur-Saone, Rue Grenett 117 (France)

"Process for the manufacture of a heat exchanger"

Priority dated October 20, 1972 from the French Patent application no. 72 37 264

j The invention relates to a method for producing a

j heat exchanger, consisting of a heat-absorbing or heat-emitting liquid containing tube and a heat

exchange wall

The efficiency of a APPARATE a heat exchanger containing such as a freezer often depends on the ßüte j: the heat exchange between the cooling liquid-containing tube and the heat exchange wall from _s to abutting the pipe and the refrigerant returns (or the heat dissipates). The conventional method for attachment of this tube on the heat - exchange wall is _s stick on the tube or by spot welding with the heat exchange wall to connect and often leads only unsatisfactory results -to the heat transfer · regard.

The invention is based on the object _s to create a method of the generic type indicated in the introduction, with which in

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2 3 519 2 Q

simply as a result a good heat-conducting connection between the tube and the heat exchange _{wall 3} , but also an improvement in the mechanical strength of this Viand and high tightness of the same is achieved in the event that the heat exchange wall consists of several composite elements.

This object is achieved according to the invention in that the heat exchange wall with a layer of a fusible Material is coated so that the pipe is pressed against this layer and that the assembly is then heated, until the pipe comes into direct, intimate contact with the wall and then the assembly is cooled.

It is achieved by heating the arrangement that the tube is in direct contact with the heat exchange wall comes, while it is ensured by the cooling that the pipe is held in the assumed position an.der wall will.

Advantageous developments of the method are in the dependent claims marked. .

The method according to the invention is described below with reference to a schematically simplified exemplary embodiment Drawing explained.

In this drawing, a section through part of a container of a freezer is shown, which consists of a Heat exchanger according to the invention consists of *

However, the method according to the invention is also applicable to everyone other heat exchangers applicable.

In the example shown, the container 1 comprises a schematic reproduced freezer a heat exchange wall 2

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and one arranged in a meandering manner on a surface of this wall Tube 3, which contains a cooling liquid, and a Layer made of a fusible material 4, which both for the bonding and the good thermal contact of the pipe 3 with the wall 2 as well as for the sealing of this wall.

The wall 2 of the container 1 consists in this example of three elements, one of which is the two side surfaces and forms the bottom of the container while the others constitute the end faces of the container. j

According to the method according to the invention, these three elements are first placed on an adjustable mounting bracket put together and with one another by double-sided adhesive tapes that form the end faces between the two Elements and the adjoining edges of the third element are inserted, glued together and form one Container 1. Subsequently, plates 4 are placed on the entire outer surface of the wall of the container thus formed. which consist of a fusible material, and are preferably j magnetic on a surface so that they can easily j can be applied to a vertical sheet metal wall and hold on there itself, with such a magnetic adhesion also avoids the inclusion of air bubbles between the fusible material and the sheet metal. The meandering or serpentine pipe 3 » through which the cooling liquid (or heating liquid) flows, is pressed firmly against the plates of fusible material 4, including not shown, comb-like Serving devices. The entire arrangement from the comb-like device, the container with parts 2, 3 and 4 and j

the wearer is in a j

ο 'oven to a temperature of the order of 200 C heated up. Meanwhile, the plates made of fusible material form a continuous layer and stick to the

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Wall of the container 1, fill the holes, breakthroughs and Butts in this wall 2 and in this way make an excellent Tightness of the container 1 safe. Under the pressure of the comb-like devices, the tube 3 displaces the softened, fusible material 4 and comes into direct, intimate contact with the wall 2 of the container 1. The aside Pressed parts of the fusible material form 3 beads 5 on both sides of the tube. The arrangement the comb-like devices, the container with parts 2, 3 and 4 and the carrier is then placed in a cooling shaft transferred until it has cooled to a temperature of 40 ° C, at which the container 1 is both removed from the carrier as well as the comb-like devices can be removed. The fusible material and its beads 5 hold the tube 3 fixed to the wall 2 of the container 1. The high mechanical Strength of the layer of fusible material after cooling contributes to increasing the strength of the container 1 at.

The method according to the invention allows a considerable reduction in the need for fastening the tube 3 to the Wall 2 usually expended, since it is also advantageous e.g. the exact and time-consuming application of one of the Course of the pipe 3 following adhesive strips, mastic strips od. The like. Is omitted, on which the tube 3 had to be pressed so far.

Avoids a continuous and intimate connection between the pipe 3 and the wall 2 according to the method according to the invention the poor heat transfer that is usually found in those heat exchangers where the tube is attached to a wall 2 by spot welding. Accordingly, the method of the invention ultimately results in one Improvement of the efficiency of the devices equipped with the corresponding heat exchangers.

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Claims (3)

8Mfecbii 21 - ^ üödstr. 81 October 16, 1973 Tekfon 50176? 7657-IV / He, Ets. Bonnet j Constructeurs, Villefranche-Sur-Saone, Rue Grenette 117 (France) Claims: 1. A method for producing a heat exchanger, consisting of a tube containing a heat-absorbing or heat-emitting liquid and a heat exchange wall , characterized in that the heat exchange wall (2) is coated with a layer of a fusible material (4), that the tube (3) is pressed against this layer and that then the assembly is heated until the tube comes into direct, intimate contact with the wall and then the assembly is cooled. 2. The method according to claim 1, characterized in that the heat exchange wall forming elements on a carrier or Core are assembled and that the surface of the wall so formed with plates of the fusible material is occupied. 3. The method according to claim 2, characterized in that the plates made of the fusible material are magnetic on one of their surfaces. 409817/0902 Blank page