Fast changing heating-cooling device and method

Details Fast changing heating-cooling device and method Fast changing heating-cooling device and method

F - Mech Eng,Light,Heat,Weapons

25

B

F25B 29/00 (2006.01) A61B 18/02 (2006.01) A61F 7/00 (2006.01) F25B 9/02 (2006.01) F25B 41/00 (2006.01) A61B 17/00 (2006.01)

Patent

CA 2113381

A method for creating a surface having a fast changing temperature, comprises providing a heat exchanger coupled to an orifice opening into a jacket which is in contact with the surface to be heated and cooled, the said jacket forming a reservoir capable of housing a fluid in contact with the surface to be heated and cooled, and providing two gas sources, each gas source being independently connected to the said heat exchanger, one source providing a first gas, which liquefies when it expands through the said orifice, and the other gas source providing a second gas, having an inversion temperature lower than the temperature obtained by the liquefaction of the first gas, and causing the exhaust gas flowing out from the said jacket, to flow through the said heat-exchanger to preheat or precool the inflowing gas, as the case may be, and further causing the said first and the said second gas alternately to flow through the said heat exchanger and orifice, to cool or to heat the said surface; means being provided for allowing and stopping the flow of each gas through the said orifice.

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