Patent US836930A successfully refreshed from Google Patents.
Patent US3881322A successfully refreshed from Google Patents.
US3881322A
Expired / Lapsed
US
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Method of cooling products
Assignee: Air Liquide SA
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Filing: 1972-11-10
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Granted: 1975-05-06
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Expires: 1992-11-10
Abstract
Abstract A method of cooling a product of low heat conductivity, of the kind in which the product is displaced from the inlet to the outlet of an elongated cooling zone, into an intermediate point of which is introduced a gas which divides into two streams, one circulating in counter-flow towards the inlet and in contact with said product, and the other in concurrent flow towards the outlet of said zone, the latter comprising at least one heat exchanger traversed by a refrigerant fluid in course of vaporization, from which at least part of said gas is obtained, the flow of gas being turbulent in that part of its travel effected while in contact with said exchanger, and serving as a heat-transfer medium between the product and the exchanger; the refrigerant fluid is introduced at a pressure higher than that existing outside the cooling zone, and the said counter-flow stream closely envelops at least part of the product to be cooled. The method is suitable for handling products to be cooled such as rubber, plastic material, resins, glue, pasty chemical products, food products, etd.
Inventors
- 👤 Diouron Raymond Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:22
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D1/0535; F28D1/05366; F28D1/05375; B; B29; B29B; B29B13/00; B29B13/04; F25; F25D; F25D3/00; F25D3/10; F25D3/11; F28D21/00; F28D2021/0019; F28D2021/0061; F28D2021/0064; F28F; F28F2280/00; F28F2280/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
230 words
A method of cooling a body, comprising; a. displacing the body to be cooled inside an elongated cooling zone, from the inlet to the outlet thereof, in a longitudinal direction with respect to said cooling zone, b. introducing into said cooling zone a pressurized gaseous medium, and causing at least part of said introduced gaseous medium to circulate in direct contact with said body, towards said inlet, in said longitudinal direction, as a countercurrent flow with respect to the displacement direction of said body, c. pressurizing a refrigerant liquid to a pressure higher than the ambient pressure outside said cooling zone; vaporizing said pressurized refrigerant liquid in at least a longitudinal heat exchanger, said heat exchanger being in heat exchange relationship with said cooling zone, and in direct contact with said countercurrent flow; obtaining said pressurized gaseous medium from at least part of the vaporized refrigerant liquid issuing from said heat exchanger, d. in at least a longitudinal flow path section of heat transfer, extending along said heat exchanger, constraining said countercurrent flow into a substantially turbulent and longitudinal gaseous stream, closely enveloping at least part of the body to be cooled, whereby said gaseous medium acts in at least said longitudinal flow path section as a heat transfer medium from said body to said heat exchanger and has a substantially constant low temperature along said longitudinal flow path section.
Claim 2
Independent Claim
230 words
A method of cooling a body, comprising; a. displacing the body to be cooled inside an elongated cooling zone, from the inlet to the outlet thereof, in a longitudinal direction with respect to said cooling zone, b. introducing into said cooling zone a pressurized gaseous medium, and causing at least part of said introduced gaseous medium to circulate in direct contact with said body, towards said inlet, in said longitudinal direction, as a countercurrent flow with respect to the displacement direction of said body, c. pressurizing a refrigerant liquid to a pressure higher than the ambient pressure outside said cooling zone; vaporizing said pressurized refrigerant liquid in at least a longitudinal heat exchanger, said heat exchanger being in heat exchange relationship with said cooling zone, and in direct contact with said countercurrent flow; obtaining said pressurized gaseous medium from at least part of the vaporized refrigerant liquid issuing from said heat exchanger, d. in at least a longitudinal flow path section of heat transfer, extending along said heat exchanger, constraining said countercurrent flow into a substantially turbulent and longitudinal gaseous stream, closely enveloping at least part of the body to be cooled, whereby said gaseous medium acts in at least said longitudinal flow path section as a heat transfer medium from said body to said heat exchanger and has a substantially constant low temperature along said longitudinal flow path section.
Claim 3
Dependent Claim
46 words
A method as claimed in claim 1, in which the distance between said heat exchanger and said body to be cooled is adjusted so as to regulate the heat exchange rate between said gaseous medium and said body, along said flow path section of heat transfer.
Claim 4
Dependent Claim
203 words
A method as claimed in claim 1, further comprising: e. introducing said pressurized gaseous medium into said cooling zone, at a location intermediate the inlet and the outlet of said zone, f. dividing said introduced gaseous medium into a countercurrent flow and a cocurrent flow, circulating in said longitudinal direction, in direct contact with said body, towards respectively the inlet and the outlet of said cooling zone, g. vaporizing said pressurized refrigerant liquid in at least another longitudinal heat exchanger, said another heat exchanger being in heat exchange relationship with said cooling zone, and in direct contact with said cocurrent flow; obtaining said pressurized gaseous medium from at least part of the vaporized refrigerant liquid issuing from said another heat exchanger, h. at least in another longitudinal flow path section of heat transfer, extending along said another heat exchanger, constraining said cocurrent flow into a substantially turbulent and lonitudinal gaseous stream, closely enveloping at least part of the body to be cooled, whereby said gaseous medium acts in at least said another longitudinal flow path section as a heat transfer medium from said body to said another heat exchanger and has a substantially constant low temperature along said another longitudinal flow path section.
Claim 5
Dependent Claim
57 words
A method as claimed in claim 3, in which the respective flow rates of said countercurrent flow and said cocurrent flow are such that the pressure losses between the intermediate introduction location of the gaseous medium and the inlet of said cooling zone, and between said intermediate location and the outlet of said zone, are substantially equal.
Claim 6
Dependent Claim
67 words
A method as claimed in claim 3, wherein the flow of said pressurized refrigerant liquid into at least one of said heat exchangers is interrupted, and consequently, the longitudinal flow path section extending along the interrupted heat exchanger comprises a cooling flow path section, wherein said gaseous medium acts as a cooling medium for said body to be cooled, and becomes heated along said flow path section.
Claim 7
Dependent Claim
136 words
A method as claimed in claim 1, further comprising: i. providing with an auxiliary refrigerant liquid, having a boiling point above tat of said refrigerant liquid, at least an auxiliary longitudinal heat exchanger, located upstream of said heat exchanger with respect to the displacement direction of said body, said auxiliary heat exchanger being in heat exchange relationship with said cooling zone, and in direct contact with said countercurrent flow, j. in at least an auxiliary longitudinal flow path section of heat transfer, extending along said auxiliary heat exchanger, constraining said countercurrent flow into a substantially turbulent and longitudinal gaseous stream, closely enveloping at least part of the body to be cooled, whereby said gaseous medium acts in said longitudinal auxiliary flow path section as a heat transfer medium from said body to said auxiliary heat exchanger.
Claim 8
Dependent Claim
15 words
A method as claimed in claim 6, in which said auxiliary refrigerant liquid is water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |