Patent US1574025A successfully refreshed from Google Patents.
US3757530A
Expired / Lapsed
US
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Cooling system for data processing apparatus
Assignee: Control Data Corp
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Filing: 1972-04-12
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Granted: 1973-09-11
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Expires: 1992-04-12
Abstract
Abstract A refrigeration system is provided for an electronic computer in which a plurality of parallel refrigeration lines are derived from a single source of liquified refrigerant and in which each of the parallel refrigeration lines passes through a plurality of cold plates over which the computer logic modules are adapted to fit. Partially gaseous and partially liquid refrigerant is recombined from the parallel refrigeration lines at a manifold and passes through additional elements of the computer assembly, such as power supply devices, where it becomes superheated and is returned to the source of refrigerant. Refrigerant flow in the individual parallel channels need not be exactly balanced, but a rough balance of refrigerant flow may be obtained by providing additional heat to a parallel channel having adequate cooling reserve capacity, as measured by liquid refrigerant flow in its output, so as to increase the cooling load on the entire system thereby causing increased refrigerant flow through a channel having insufficient cooling capacity as measured by low volume or no volume of liquified refrigerant in its output.
Inventors
- 👤 R Keller
- 👤 M Doyle
- 👤 R Cree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:44
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/2029; H05K7/20381
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
177 words
A conduction cooling system for electronic data processing apparatus comprising: a source of refrigerant fluid for use in cooling the apparatus and having both a supply line for condensed refrigerant and a return line for evaporated refrigerant, a variable flow expansion valve connected to said refrigerant supply line, a plurality of capillary tubes connected with the refrigerant output of said expansion valve, a first evaporator consisting of a plurality of parallel cooling lines connected respectively to said capillary tubes and each line haviNg a plurality of cold plates for cooling heat producing elements associated therewith, means for collecting refrigerant from the plurality of parallel channels of the refrigerant system, a second evaporator connected with said means for collecting refrigerant associated with a heat source independent from the heat producing elements associated with said first evaporator said second evaporator having at least one refrigerant flow path therethrough and a single refrigerant output line, and a sensing element for producing a signal for controlling said expansion valve, said element placed on the refrigerant output line from said second evaporator.
Claim 2
Dependent Claim
177 words
A conduction cooling system for electronic data processing apparatus comprising: a source of refrigerant fluid for use in cooling the apparatus and having both a supply line for condensed refrigerant and a return line for evaporated refrigerant, a variable flow expansion valve connected to said refrigerant supply line, a plurality of capillary tubes connected with the refrigerant output of said expansion valve, a first evaporator consisting of a plurality of parallel cooling lines connected respectively to said capillary tubes and each line haviNg a plurality of cold plates for cooling heat producing elements associated therewith, means for collecting refrigerant from the plurality of parallel channels of the refrigerant system, a second evaporator connected with said means for collecting refrigerant associated with a heat source independent from the heat producing elements associated with said first evaporator said second evaporator having at least one refrigerant flow path therethrough and a single refrigerant output line, and a sensing element for producing a signal for controlling said expansion valve, said element placed on the refrigerant output line from said second evaporator.
Claim 3
Dependent Claim
19 words
The cooling system of claim 1 having a manifold distributor placed between said expansion valve and said capillary tubes.
Claim 4
Dependent Claim
26 words
The cooling system of claim 1 wherein said sensing element is a temperature sensing thermistor and said variable flow expansion valve is an electrically operated valve.
Claim 5
Independent Claim
218 words
A method of equalizing refrigerant flow in a cooling system of the type having a plurality of parallel cooling lines connected with refrigerant flow from a common variable flow expansion valve, the parallel cooling lines each having independent heat loads, the refrigerant output from the parallel cooling lines being collected and passed through an additional heat load and finally analyzed by a sensing element for regulating said expansion valve, the cooling system being of a type in which the refrigerant flowing in the respective parallel lines is partially evaporated and in which the evaporation is completed in the additional heat load with said sensing element and expansion valve regulating exhausted refrigerant to a slightly superheated condition, the method comprising the steps of: first, determining the percentage of refrigerant evaporated in each of the parallel cooling lines so as to determine the reserve of unevaporated refrigerant in each of the parallel cooling lines, and then applying additional heat to any one or combination of said parallel cooling lines determined to have an adequate cooling capacity as indicated by the reserve of unevaporated refrigerant in such lines so as to increase total refrigerant flow in the system thereby providing an adequate reserve of unevaporated refrigerant in any one or combination of such lines as determined to have an inadequate flow.
Claim 6
Independent Claim
218 words
A method of equalizing refrigerant flow in a cooling system of the type having a plurality of parallel cooling lines connected with refrigerant flow from a common variable flow expansion valve, the parallel cooling lines each having independent heat loads, the refrigerant output from the parallel cooling lines being collected and passed through an additional heat load and finally analyzed by a sensing element for regulating said expansion valve, the cooling system being of a type in which the refrigerant flowing in the respective parallel lines is partially evaporated and in which the evaporation is completed in the additional heat load with said sensing element and expansion valve regulating exhausted refrigerant to a slightly superheated condition, the method comprising the steps of: first, determining the percentage of refrigerant evaporated in each of the parallel cooling lines so as to determine the reserve of unevaporated refrigerant in each of the parallel cooling lines, and then applying additional heat to any one or combination of said parallel cooling lines determined to have an adequate cooling capacity as indicated by the reserve of unevaporated refrigerant in such lines so as to increase total refrigerant flow in the system thereby providing an adequate reserve of unevaporated refrigerant in any one or combination of such lines as determined to have an inadequate flow.
References Cited (Backward Citations)
US2148414A
Cited
US2409661A
Cited
US2534272A
Cited
US2669099A
Cited
US2707868A
Cited
US3577743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |