FR2507759A1

FR2507759A1 - Fluid flow heat exchanger - has block of heat conducting material pierced with parallel channels for two liquid flow

Info

Publication number: FR2507759A1
Application number: FR8111699A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1981-06-15
Filing date: 1981-06-15
Publication date: 1982-12-17

Abstract

The heat exchanger is made from a block of heat conducting material. In this are bored parallel axis channels. The liquid to be heated flows in some channels and that to be cooled flows in others. Heat transfer occurs across the block of material. The channels can have any form of toothed or grooved surface to increase the total surface area in contact with the liquids. The block can be subjected to drawing processes to form the channels or they may be formed by piercing.

Description

La présente invention concerne un échangeur de chaleur à structure sinplifiée. Dans l'état actuel de la technique, un des fluidescaloporteurs circule dans des canaux, genéralement tubulaires, tandis que l'autre fluide caloporteur circule autour de ces canaux. Il faut donc prévoir une enveloppe qui enferre les canaux dans lesquels circule le premier fluide, et cette enveloppe doit contenir des dispositifs propres a guider la circulation du second fluide, et des moyens de fixation qu2 assufettissent les canaux du premier fluide à l'enveloppe du second. The present invention relates to a heat exchanger with a sinplified structure. In the current state of the art, one of the heat transfer fluids circulates in channels, generally tubular, while the other heat transfer fluid circulates around these channels. It is therefore necessary to provide an envelope which encloses the channels in which the first fluid circulates, and this envelope must contain devices capable of guiding the circulation of the second fluid, and fixing means which make the channels of the first fluid soften the envelope of the second.

L'échangeur suivant la présente invention évite la complication de ces systèmes. Il est en effet constitué d'un bloc de matière conductrice de la chaleur dans lequel sont forés des canaux dont les directions sont paraI le les et dont les sections sont de formes quelconques. Certains de ces canaux sont parcourus par le premier fluide, les autres sont parcourus par le second fluide. L'échange thermique sSeffectue par conduction a travers la matiere du bloc. The exchanger according to the present invention avoids the complication of these systems. It is in fact made up of a block of heat-conducting material in which channels are drilled whose directions are parallel and whose sections are of any shape. Some of these channels are traversed by the first fluid, the others are traversed by the second fluid. The heat exchange takes place by conduction through the material of the block.

La figure I indique une forme possible de la section du bloc. Il peut être fabriqué par filage de la section indiquée. Figure I shows a possible shape of the block section. It can be manufactured by wiring the indicated section.

La figure 2 indique une seconde forme possible de la section du bloc. Figure 2 shows a second possible form of the block section.

il peut autre fabriqué soit par filage, soit par perçage d'une ébauche suivi oc non d'un étirage.it can also be produced either by spinning or by drilling a blank followed by no drawing.

La collecte separee~des deux fluides aux extrémités du bloc peut être faite, dans les deux cas ci-dessus, de la *niere représentée figure 3. Le canal axial est affecté a l'un des fluides, la couronne de canaux périphériques a l'autre fluide. Une opération de décolletage élimine les canaux périphériques sur une certaine longueur aux extrémités du bloc, en ne laissant subsister que la matière qui entoure le canal axial, formant ainsi un tube marqué 2. La piece marquée I est fixée, par soudure ou mécaniquement, sur le bloc marqué 3, L'un des fluide pénètre par le tube 2, l'autre sort par l'orifice 4. Separate collection ~ of the two fluids at the ends of the block can be made, in the two cases above, from the * niere shown in Figure 3. The axial channel is assigned to one of the fluids, the crown of peripheral channels has l other fluid. A bar turning operation eliminates the peripheral channels over a certain length at the ends of the block, leaving only the material which surrounds the axial channel, thus forming a tube marked 2. The part marked I is fixed, by welding or mechanically, to the block marked 3, one of the fluids enters through the tube 2, the other exits through the orifice 4.

D'autres dispositions et/ou formes des canaux sont possibles, et d'autres techniques de fabrication du bloc, telles le moulage, le frittage, ou autre. Other arrangements and / or shapes of the channels are possible, and other techniques for manufacturing the block, such as molding, sintering, or the like.

La section des canaux peut être de forme contournée, striée, cannelée et/ou dentelée, afin d'accrottre la surface de contact entre les fluides et le bloc. Un exemple de cannelure se trouve en figure 4. The section of the channels can be of contoured, striated, grooved and / or serrated shape, in order to increase the contact surface between the fluids and the block. An example of groove can be found in Figure 4.

Claims

I. Heat exchanger characterized in that it consists of a block of heat conducting material in which are drilled channels whose axes are parallel and whose sections have any shape. The fluid to be heated is introduced into certain channels, the fluid to be cooled is introduced into others. The heat exchange takes place by conductivity through the material of the block.

2. Exchanger according to claim I, characterized in that the channels have grooved, ribbed, serrated or contoured forms so as to increase the contact surface between the fluid and the material of the block.

3. Exchanger according to claims I etiou 2 characterized in that it is produced by spinning.