US4373348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Energy saving refrigeration system
Assignee: Tyler Refrigeration Corp
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Filing: 1981-01-21
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Granted: 1983-02-15
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Expires: 2001-01-21
Abstract
Abstract A refrigeration system having an increasing efficiency of operation and reduction in power consumption. Low head pressure and subcooling the liquid refrigerant emitted from the remote condenser, the efficiency of operation of the compressor of the refrigeration system can be substantially increased. The particular type of refrigeration system of concern generally includes a compressor for compressing a gaseous refrigerant, a condenser for condensing the gaseous refrigerant and subcooling the liquid refrigerant, a receiver for receiving the liquid and a plurality of display cases having evaporators for evaporating the liquid refrigerant. The gaseous refrigerant passing through the condenser is first condensed into a liquid at a condensing temperature of approximately 10° to 25° F. above a preselected cooling temperature. The condensed liquid is then subcooled to the preselected cooling temperature which should be preferably either approximately 50° F. or the temperature of the ambient atmosphere surrounding the condenser, whichever is higher.
Inventors
- 👤 Fayez Ibrahim
- 👤 Edward Bowman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:33
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; F25B1/00; F25B29/00; F25B29/003; F25B49/00; F25B49/02; F25B49/027; F25B2400/00; F25B2400/07; F25B2400/075; F25B2400/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
117 words
A method of operating a refrigeration system having compressor means, condenser means, receiver means and evaporator means and including the steps of: compressing gaseous refrigerant to a relatively high compressor discharge temperature and relatively high compressor discharge pressure, the compressor discharge temperature being substantially above saturation temperature of the refrigerant at the compressor discharge pressure; condensing the compressed gaseous refrigerant to a liquid, subcooling the liquid refrigerant to a preselected temperature level before such refrigerant leaves the condenser; maintaining an operative system pressure within the receiver by the supply of gaseous refrigerant from the compressor; evaporating the liquid refrigerant at a substantially lower pressure than the compressor discharge pressure; and returning the evaporated refrigerant to the compressor.
Claim 2
Independent Claim
117 words
A method of operating a refrigeration system having compressor means, condenser means, receiver means and evaporator means and including the steps of: compressing gaseous refrigerant to a relatively high compressor discharge temperature and relatively high compressor discharge pressure, the compressor discharge temperature being substantially above saturation temperature of the refrigerant at the compressor discharge pressure; condensing the compressed gaseous refrigerant to a liquid, subcooling the liquid refrigerant to a preselected temperature level before such refrigerant leaves the condenser; maintaining an operative system pressure within the receiver by the supply of gaseous refrigerant from the compressor; evaporating the liquid refrigerant at a substantially lower pressure than the compressor discharge pressure; and returning the evaporated refrigerant to the compressor.
Claim 3
Dependent Claim
28 words
A method according to claim 1 wherein the refrigerant is ideally cooled to a temperature between 30° F. and 50° F. but the minimum being the ambient temperature.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein the refrigerant is cooled to a temperature of higher than approximately 45° F.
Claim 5
Dependent Claim
18 words
A method according to claim 3 wherein the refrigerant is cooled to a temperature of approximately 50° F.
Claim 6
Dependent Claim
64 words
A method according to claim 1, 2, 3 or 4 further comprising the step of regulating the pressure in the condenser means so as to maintain the pressure of the refrigerant in the condenser means at a level where the gaseous refrigerant will condense into a liquid at a temperature above the preselected cooling temperature level of the liquid refrigerant leaving the condenser means.
Claim 7
Dependent Claim
27 words
A method according to claim 5 wherein the condensing temperature is approximately 10° to 25° F. higher than the preselected cooling temperature level for the liquid refrigerant.
Claim 8
Dependent Claim
107 words
A method according to claim 5 where the condenser means includes a remote condenser to be located so that it is exposed to ambient air from outside of a building in which said refrigeration system is to be installed and a heat recovery condenser to be located within the building and only the refrigerant passing through the remote condenser is subcooled; and further comprising the step of: causing the gaseous refrigerant to normally flow only through the remote condenser and to flow through both the heat recovery condenser and the remote condenser when heat from the condenser means is to be utilized to help heat the building.
Claim 9
Dependent Claim
30 words
A method according to claim 7 wherein when the heat recovery condenser is in operation, the condenser pressure is regulated such that the gaseous refrigerant condenses at a higher temperature.
Claim 10
Dependent Claim
23 words
A method according to claim 1 further comprising the step of maintaining the pressure in the receiver means at a predetermined minimum level.
Claim 11
Dependent Claim
28 words
A method according to claim 1 further comprising the step of periodically defrosting the evaporator means by conducting gaseous refrigerant from the compressor means to the evaporator means.
Claim 12
Dependent Claim
39 words
A method according to claim 1, wherein said maintaining step is preceded by the step of: cooling a portion of the gaseous refrigerant from the compressor to form a supply of cooled gaseous refrigerant for use in the receiver.
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) | 1986-02-14 | 1986-08-16 | 1987-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-14 | 1990-08-16 | 1991-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-14 | 1994-08-16 | 1995-02-15 | $7700.00 | Window Closed / Lapsed |