US3736763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Condenser pressure control apparatus
Assignee: Frick Co Inc
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Filing: 1971-09-03
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Granted: 1973-06-05
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Expires: 1991-09-03
Abstract
Abstract Non-condensable gas in a storage chamber is introduced into a refrigeration system to maintain condenser pressure above a desired minimum, and is permitted to escape from the refrigeration system back to the storage chamber to relieve high condenser pressures. Pressure responsive switches monitor the high side of the refrigeration system and control the flow of the non-condensable gas into and out of the refrigeration system.
Inventors
- 👤 M Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:15
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/027; F25B2400/00; F25B2400/04; F25B2400/0409; F25B2400/0411; F25B2600/00; F25B2600/02; F25B2600/026; F25B2600/0261
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
196 words
In a refrigeration system having a high pressure side and a low pressure side, means for raising the pressure of refrigerant from the low pressure side to the high pressure side, and means for condensing and receiving condensed refrigerant in the high pressure side, the improvement comprising, means for maintaining the level of pressure in the condensing and receiving means within a predetermined range, said pressure level maintaining means comprising storage vessel means having a first connection to the low pressure side adjacent to the pressure raising means and a second connection to the receiving means, a gas which is non-condensable in the system within the storage vessel means, and first and second valve means for selectively opening and closing said first and second connections to permit selective release of the non-condensable gas from the vessel means into the pressure raising means for discharge into the condensing and receiving means when the pressure level therein is relatively low in order to raise it and for release of said gas from the receiving means back into the vessel means when the pressure level in the condensing and receiving means is relatively high in order to lower it.
Claim 2
Dependent Claim
196 words
In a refrigeration system having a high pressure side and a low pressure side, means for raising the pressure of refrigerant from the low pressure side to the high pressure side, and means for condensing and receiving condensed refrigerant in the high pressure side, the improvement comprising, means for maintaining the level of pressure in the condensing and receiving means within a predetermined range, said pressure level maintaining means comprising storage vessel means having a first connection to the low pressure side adjacent to the pressure raising means and a second connection to the receiving means, a gas which is non-condensable in the system within the storage vessel means, and first and second valve means for selectively opening and closing said first and second connections to permit selective release of the non-condensable gas from the vessel means into the pressure raising means for discharge into the condensing and receiving means when the pressure level therein is relatively low in order to raise it and for release of said gas from the receiving means back into the vessel means when the pressure level in the condensing and receiving means is relatively high in order to lower it.
Claim 3
Dependent Claim
70 words
The invention as defined in claim 1 in which the volume of the storage vessel means is sufficiently large to maintain the pressure of said non-condensable gas in said storage vessel means below a minimum pressure required for proper refrigerant flow from the high pressure side to the low pressure side, and above a rated low side pressure when the first and second valve means are selectively opened and closed.
Claim 4
Dependent Claim
27 words
The invention as defined in claim 1, and means responsive to the pressure in said receiving means for opening and closing said first and second valve means.
Claim 5
Dependent Claim
63 words
The invention as defined in claim 1, first and second means responsive to the pressure in said receiving means, means connecting said first pressure responsive means to said first valve means and means connecting said second pressure responsive means to said second valve means, whereby said first and second valve means are automatically operated in response to the pressure in said receiving means.
Claim 6
Dependent Claim
173 words
A compression refrigeration system having a high side and a low side, a storage chamber for non-condensable gas, first and second fluid lines connecting said refrigeration system to said storage chamber, first means responsive to a predetermined low pressure in said high side for opening said first fluid line and permitting entry of said non-condensable gas into said high side to raise pressure in said high side above such predetermined low pressure, said first pressure responsive means operative to close said first fluid line at a selected pressure in said high side above said predetermined low pressure, second means responsive to a predetermined upper pressure in said high side for opening said second fluid line to relieve pressure and permit escape of non-condensable gas from said high said when said high side pressure is above said selected pressure, said second pressure responsive means operative to close said second fluid line at a pressure in said high side below said pressure at which said second fluid line is opened but above said selected pressure.
Claim 7
Dependent Claim
173 words
A compression refrigeration system having a high side and a low side, a storage chamber for non-condensable gas, first and second fluid lines connecting said refrigeration system to said storage chamber, first means responsive to a predetermined low pressure in said high side for opening said first fluid line and permitting entry of said non-condensable gas into said high side to raise pressure in said high side above such predetermined low pressure, said first pressure responsive means operative to close said first fluid line at a selected pressure in said high side above said predetermined low pressure, second means responsive to a predetermined upper pressure in said high side for opening said second fluid line to relieve pressure and permit escape of non-condensable gas from said high said when said high side pressure is above said selected pressure, said second pressure responsive means operative to close said second fluid line at a pressure in said high side below said pressure at which said second fluid line is opened but above said selected pressure.
Claim 8
Independent Claim
120 words
The method of controlling the range of pressure level in the high side of a refrigeration system having a compressor and a low side, comprising providing an auxiliary housing for a non-condensable gas, continuously sensing the level of pressure in the high side, withdrawing non-condensable gas from the auxiliary housing into the low side, through the compressor and into the high side when the pressure level in the high side is below a predetermined level only to the extent necessary to raise the pressure to a predetermined operating level, and withdrawing the non-condensable gas from the high side directly into the auxiliary housing in response to a level of pressure in the high side which is above a predetermined level.
Claim 9
Independent Claim
120 words
The method of controlling the range of pressure level in the high side of a refrigeration system having a compressor and a low side, comprising providing an auxiliary housing for a non-condensable gas, continuously sensing the level of pressure in the high side, withdrawing non-condensable gas from the auxiliary housing into the low side, through the compressor and into the high side when the pressure level in the high side is below a predetermined level only to the extent necessary to raise the pressure to a predetermined operating level, and withdrawing the non-condensable gas from the high side directly into the auxiliary housing in response to a level of pressure in the high side which is above a predetermined level.
References Cited (Backward Citations)
US2951350A
Cited
US3499298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |