Heat exchange – Radiator core type – Deformed sheet forms passages between side-by-side tube means
Patent
1991-09-20
1993-02-09
Flanigan, Allen J.
Heat exchange
Radiator core type
Deformed sheet forms passages between side-by-side tube means
165 78, 29890039, 228183, F28D 103
Patent
active
051846730
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method for the manufacture of a plate heat exchanger/cooler, which, in its finished state, exhibits a number of passageways communicating in parallel via collectors and intended for a fluid which is to be cooled, each and every one of which passageways consists of a pair of preferably rounded, rectangular plates executed with projecting and outward-folded edges and facing one another, with openings arranged on the short sides, which, in the finished heat exchanger/cooler, constitute the aforementioned collectors, in conjunction with which, on the one hand, spacer washers which define slotted flow openings for a cooling medium are present between pairs of plates situated adjacent to one another and, on the other hand, a distance piece is present between each pair of plates in an area on the respective short side, whereby the spacer washers and the plates and the pairs of plates are joined together at least along their outward-folded edges by a furnace brazing process.
For the sake of simplicity the expression cooler is used below for both heat exchanger and cooler.
For the purposes of the installation of previously disclosed coolers of the aforementioned kind, they are provided with fastening devices, often in the form of fastening lugs or similar. These are usually attached to one of the outer plates of the cooler or take the form of projecting parts of the connection sleeves of the cooler. In order to be able to install the cooler in conjunction with a system of which it is a part, coolers of the previously disclosed kind require the fastening lugs to project beyond the cooler. This means that the cooler takes up a comparatively large amount of space, due to the fact that more space is required than that which is needed by the actual cooler. This previously disclosed type of installation is also not ideal from the point of view of its strength, since vibrations can give rise to fatigue damage, inter alia at the point of attachment of the fastening lugs to the cooler.
A primary object of the present invention is to make available a method for the manufacture of a cooler which, for the purposes of its installation, takes up less space than previously disclosed coolers. This is achieved through the invention, in that the spacer washers and the distance pieces are positioned in the same area, in that the aforementioned plates and spacer washers/distance pieces are caused during the furnace brazing operation to form a solid body on the respective short side of the plate heat exchanger/cooler, and in that before or after the furnace brazing operation at least one channel running across the plates and through these and the space washers/distance pieces is produced in the aforementioned area, which channel is intended to be utilized in conjunction with the installation of the heat exchanger/cooler.
A cooler which is also considerably more resistant to vibration than previously disclosed coolers is obtained via the method of manufacture in accordance with the invention.
The arrangement of spacers between the plates in dismantlable radiators made of relatively thin plate is previously disclosed through, for example, patent specification DE 122 393, patent application for public inspection DE 1 172 828 and patent application FR 74 26 763. These spacers are arranged in areas where the plates are exposed to stresses from clamping braces by means of which the component parts of the radiator are held together. The spacers thus serve the purpose of relieving the stress on the radiator plates and of increasing the rigidity of the radiator. The aforementioned publications do not reveal the presence of any solid body of the kind in accordance with the invention.
Further characteristic features of the cooler in accordance with the invention can be appreciated from the accompanying sub-claims and from the following description of the accompanying drawing, in which
FIG. 1 shows in perspective view one half of a cooler manufactured by the method to which the invention relates.
FIGS. 2a, 2b and
REFERENCES:
patent: 3451114 (1969-06-01), Werneke
patent: 3805889 (1974-04-01), Coolidge
patent: 4211278 (1980-07-01), Bennett et al.
patent: 4484622 (1984-11-01), Satchwell
Patent Abstracts of Japan, vol. 11, No. 188 (M-599), abstract of JP-A-62-13995.
Hedman Erik
Hedman Rolf
Flanigan Allen J.
Torell AB
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