Heat exchange – Flow passages for two confined fluids – Interdigitated plural first and plural second fluid passages
Patent
1987-01-30
1988-04-26
Davis, Jr, Albert W.
Heat exchange
Flow passages for two confined fluids
Interdigitated plural first and plural second fluid passages
16510434, F28F 700
Patent
active
047398272
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
1. Background of the Invention
This invention relates to an improvement applicable to a plate type heat exchanger. More specifically, this invention relates to an improvement applicable to a plate type heat exchanger which is employable for cooling the inside of an electronic control cubile or the like in which electronic components are confined or housed.
2. Description of the Related Art
FIG. 1 illustrates the plan view of a plate type heat exchanger which is employable for cooling the inside of an electronic control cubicle or the like. The plate type heat exchanger does not comprise a chamber through which a cooling fluid flows alternately with a fluid to be cooled, but comprises a combination of a cooling fluid path and a cooled fluid path. A cooling fluid continuously flows in the cooling fluid path and a fluid to be cooled continuously flows in the cooled fluid path, thereby the cooling fluid cools the fluid to be cooled through a wall which separates the cooling fluid path and the cooled fluid path. This heat exchanger has an advantage to effectively protect the inside of an electronic control cubicle from a potential contamination by dusts, harmful chemical materials, etc. Referring to FIG. 1, the numeral 4 indicates tubular fluid path having a rectangular cross-section. A plurality of tubes 4, each of which is struck to each other in parallel to each other, is placed in a direction vertical to the page of the drawing. The tubes of which the numbers are odd (first tube, third tube, etc) have, for example, a cooling fluid A flow through them, and the tubes of which the numbers are even (second tube, fourth tube, etc.) have for example, a fluid to be cooled flow through them. Heat is thereby transmitted between the cooling fluid and the fluid to be cooled through walls 5 which separate the fluid paths 4 placed side by side.
An example of the conventional methods for fabricating the plate type heat exchanger having the aforementioned structure will be described below. Referring to FIG. 2, a thin metal plate 6 is formed to a rectangular wave formed plate. Referring to FIG. 3, the rectangular wave formed plate 6 is inserted in an external shell 7 of the heat exchanger (a tube having a large rectangular cross-section or a box from which the top and bottom plates are removed), before the top and bottom openings of the external shell 7 are closed with sealing members 8 of rubber or the like which are stuck to the external shell 7with an adhesive or the like.
The numeral 81 indicates inlets or outlets of the fluids A, B. The cooling fluid A and the fluid to be cooled B respectively flow in the fluid paths 4 respectively having every other number. Namely, the cooling fluid A flows in the fluid flow paths 41, 43 and 45, and the fluid to be cooled B flows in the fluid flow paths 42, 44 and 46. In other words, the fluid flow paths having the odd numbers (or even numbers) have the cooling fluid A and the fluid flow paths having the even numbers (or odd numbers) have the fluid to be cooled B. Heat is exchanged between the cooling fluid A and the fluid to be cooled B through the wall of the formed thin metal plate 6. The other equipment necessarily attached to the plate type heat exchanger includes a duct (not shown) connecting the inlets (or outlets) 81 of the fluid paths 41, 43 and 45 in which the cooling fluid A flows, each other, the duct (not shown) connecting the inlets (or outlets) 81 of the fluid paths 42, 44 and 46 in which the fluid to be cooled B flows, each other, a pushing fan (not shown), a pulling fan, et al. The flow directions of the cooling fluid A and the fluid to be cooled B can be freely selected. In other words, they can be either same to each other or reverse to each other.
As was described above, the plate type heat exchanger having the aforementioned structure available in the prior art is fabricated with a method comprising a step to form a thin metal plate 6 to a rectangular wave formed plate, a step to insert the thin metal plate formed to a rectangular wave for
Davis, Jr Albert W.
Fanuc Ltd
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