EP0608927A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fast changing heating-cooling device and method
Assignee: State of Israel Ministry of Defence Raphael Armament Development Authority
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Filing: 1994-01-13
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Granted: —
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Expires: 2014-01-13
Abstract
Abstract A method for creating a surface (13,20) having a fast changing temperature, comprises providing a heat exchanger (2) coupled to an orifice (3) opening into a jacket (4) which is in contact with the surface (13,20) to be heated and cooled, the said jacket (4) forming a reservoir capable of housing a fluid in contact with the surface (13,20) to be heated and cooled, and providing two gas sources, each gas source being independently connected to the said heat exchanger (2), one source providing a first gas, which liquefies when it expands through the said orifice (3), 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 (4), to flow through the said heat-exchanger (2) 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 (2) and orifice (3), to cool or to heat the said surface (13,20); means (10,11) being provided for allowing and stopping the flow of each gas through the said orifice (3).
Inventors
- 👤 Ben-Zion Maytal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 18:56
CPC Classifications
F; F25; F25B; F25B29/00; A; A61; A61B; A61B18/00; A61B18/02; F25B9/00; F25B9/02; A61B17/00; A61B2017/00017; A61B2017/00137; A61B2017/00154; A61B2018/00005; A61B2018/00041; A61B2018/0231; A61B2018/0262; A61B2018/0268; A61B2018/0281; A61B2018/0287; A61F; A61F7/00; A61F2007/0059
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
187 words
A method for creating a surface having a fast changing temperature, comprising 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.
Claim 2
Dependent Claim
14 words
A method according to claim 1, wherein the fast change in temperature is periodic.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein the fast change is controlled and effected at the time selected by the operator.
Claim 4
Independent Claim
37 words
A method according to any one of claims 1 to 3, wherein the first gas is selected from the group consisting essentially of argon, nitrogen, air, krypton, CF₄, xenon and N₂O, and the second gas is helium.
Claim 5
Independent Claim
92 words
An apparatus for the cooling and the heating of surfaces, comprising: 1) a heat exchanger coupled to an orifice, the said orifice opening into a jacket; 2) 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; 3) two gas sources, each gas source being independently connected to the said heat exchanger; 4) means for allowing and stopping the flow of each gas through the said orifice.
Claim 6
Dependent Claim
17 words
Apparatus according to claim 5, wherein the pressurized gas sources are gas reservoirs containing gas under pressure.
Claim 7
Dependent Claim
28 words
Apparatus according to claim 5, wherein the gas sources comprise one or more compressors, which draw gas from a reservoir containing gas at a lower pressure than desired.
Claim 8
Dependent Claim
19 words
Apparatus according to claim 5, wherein the heat exchanger is a thin tube or a porous matrix heat exchanger.
Claim 9
Dependent Claim
11 words
Apparatus according to claim 5, wherein the cooling is a cryocooling.
Claim 10
Dependent Claim
62 words
A probe for the cooling and the heating of surfaces, comprising: 1) a heat exchanger coupled to an orifice, the said orifice opening into a jacket; 2) 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.
Claim 11
Dependent Claim
16 words
A probe according to claim 10, wherein the surface to be heated and cooled is changeable.
Claim 12
Dependent Claim
12 words
A probe according to claim 10, wherein the cooling is a cryocooling.
Claim 13
Independent Claim
54 words
A method of selectively destroying a plurality of cells and/or tissue of a living organism, comprising bringing into contact with the surface where the cells to be destroyed are located, a probe according to any one of claims 10 to 12, and causing extreme temperature changes to take place at the contact surface thereof.
Claim 14
Dependent Claim
20 words
A method according to claim 13, for the accelerated and intensified cryodestruction of the said plurality of cells and/or tissue.
Claim 15
Dependent Claim
15 words
A method according to claim 13 or 14, wherein the treated surface is the epidermis.
Claim 16
Dependent Claim
16 words
A method according to claim 13 or 14, wherein the treated surface is the human brain.
Claim 17
Dependent Claim
16 words
A method according to claim 13 or 14, wherein the treated surface is the human eye.
Claim 18
Independent Claim
38 words
A method for generating a fast cyclical change of temperature, comprising sequentially cooling/heating of a surface by alternate gas supply to a Joule-Thomson liquefaction device comprising a heat-exchanger wherein the incoming gas exchanges heat with the exhaust gas.
Claim 19
Dependent Claim
20 words
A method according to claim 18, wherein the frequency of the temperature changes is increased by employing less extreme temperatures.
References Cited (Backward Citations)
No citation records indexed.
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