GB1048131A - Improvements in or relating to heat exchange plates - Google Patents

Abstract

1,048,131. Heat exchange elements; refrigerating. DOLE REFRIGERATING CO. April 23, 1963 [April 23, 1962], No. 15971/63. Headings F4H and F4S. A heat-exchange plate for use as a heating panel or as a refrigerant evaporator has a core formed by a plurality of parallel tubes 10, of square or rectangular cross-section, adjacent tubes being joined together throughout their length and interconnected so as to form a fluid passage from a fluid inlet of the core to a fluid outlet therefrom, the core being enclosed by a gas-tight outer casing formed of plates 30, 31 conforming closely to the shape of the core and having means 33 permitting the pressure within the casing to be reduced to less than atmospheric, whereby the plates 30 are pressed by the ambient air pressure into close contact with the tubes. The core inlet and outlet connections extend to the outside of the casing as shown. The tubes may be connected in series by bevelling their ends and welding caps 22 into the triangularshaped opening thus formed (Figs. 2, 3, 4, not shown), or in parallel by fitting channel-shaped headers 32 to the pipes (Figs. 5, 6, not shown). A liquid may be introduced between the tubes and the casing. The liquid forms, a heattransmitting -film which assists the heat transfer effect of the plate.