Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Patent
1998-04-09
1999-10-12
Lazarus, Lia S.
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
165 51, 165906, 165916, 123196AB, F28F 308
Patent
active
059642831
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a heat exchanger, especially an oil cooler for internal combustion engines, according to the preamble of the principal claim.
DE-OS 32 10 114 discloses a heat exchanger, especially a cooler for motor vehicles. This heat exchanger consists of several tubes disposed parallel to one another for carrying the heat exchange fluid. These tubes lead into an upper and a lower water box. The heat exchanger consists furthermore of lamellar plate-like heat exchange ribs disposed perpendicular to the tubes and affixed to the tubes.
These heat exchange ribs are provided at their ends with recurved end portions which are imbricated and thus form side parts on which means for fastening brackets can be disposed. The known heat exchanger, which is constructed with relatively simple elements and has good thermal transfer, has the disadvantage that, to fasten the heat exchanger additional brackets are necessary. Moreover, the connections for the heat exchange fluid are permanently set in the upper and lower water boxes and are not variable.
A heat exchanger is furthermore disclosed in DE-GM 93 09 741 in which on one side of the heat exchanger element an inlet and outlet is provided for the medium being cooled and on the other side an inlet and outlet for the coolant, i.e., the heat exchange fluid. This arrangement is characterized by simplicity of design. In many cases, however, it is desired to arrange all of the inlets and outlets on just one side.
The invention is therefore addressed to the problem of creating a heat exchanger which will be universely usable and, without increasing its bulk, can be connected wherever all of the inlets and outlets are on one side.
Setting out from the preamble of the principal claim, this problem is solved by the distinctive features thereof.
An important advantage of the invention lies in the fact that it is possible by means of the distribution plate also to integrate the inlet and outlet of the coolant. For this purpose the corresponding inlet and outlet openings are provided in the distribution plate.
According to one embodiment of the invention, a fastening plate is provided on the distribution plate. Of course it is also possible to configure the distribution plate and fastening plate as an integral unit. In a preferred manner, in the case of the two-piece configuration the distribution plate and fastening plate are soldered together.
An additional embodiment of the invention provides for constructing the distribution plate of individual plate elements which are sandwiched one on the other. This has the advantage that flow passages of different kinds and with crossovers can be provided in the individual plate elements. Thus it is possible to achieve even complicated courses of flow in the distribution plate.
An additional embodiment of the invention provides for making the individual parts of the heat exchanger from tinned aluminum. This aluminum can be tinned in a continuous oven, so that the assembly of the heat exchanger is possible without connecting.
Advantageously, the distribution plate is also integrated in its sandwich-like construction with the last heat exchanger element. The height of the entire heat exchanger element is not increased by the integration of this plate. At the same time, however, all of the connections are contained in this distribution plate.
In another embodiment of the invention, all of the inlet and outlet lines are integrated in a housing of an oil filter. The heat exchanger can thus be mounted directly on this housing. Additional connecting lines are not necessary. As an alternative, the connections for the coolant are disposed directly on the distribution plate.
These and other features of preferred embodiments of the invention will appear not only in the claims but also in the description and the drawings; the individual features can be realized individually or severally in the form of subcombinations in the embodiment of the invention and in other fields, and may represent advantageous as well as independently patentable emb
REFERENCES:
patent: 4708199 (1987-11-01), Yogo et al.
patent: 5146980 (1992-09-01), Le Gauyer
patent: 5165468 (1992-11-01), Tajima et al.
patent: 5291945 (1994-03-01), Blomgren et al.
patent: 5307869 (1994-05-01), Blomgren
patent: 5492171 (1996-02-01), Kallrot
patent: 5810071 (1998-09-01), Pavlin
Filterwerk Mann & Hummel GmbH
Lazarus Lia S.
McKinnon Terrell
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