US5253483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Environmental control system
Assignee: Uusi LLC
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Filing: 1992-07-08
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Granted: 1993-10-19
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Expires: 2012-07-08
Abstract
Abstract An environmental control system disclosed includes a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser, an evaporator and variable speed evaporator fan for moving air across the evaporator, a compressor speed control, a superheat monitor for monitoring the condition at the inlet of the compressor and a primary superheat control responsive to the superheat monitor for establishing the speed of the evaporator fan to maintain a predetermined superheat condition.
Inventors
- 👤 James W. Powell
- 👤 Mark G. Voss
- 👤 John F. Hurley
- 👤 Edward O. Hartel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:40
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3205; B60H1/3211; F; F25; F25B; F25B1/00; F25B1/10; F25B49/00; F25B49/02; F25B49/025; F25B49/027; B60H2001/3236; B60H2001/3255; B60H2001/3263; B60H2001/3269; B60H2001/3276; B60H2001/3277; B60H2001/328; B60H2001/3282; F25B2600/00; F25B2600/02; F25B2600/11; F25B2600/111; F25B2600/112; F25B2600/25; F25B2600/2501; F25B2600/2513; F25B2700/00; F25B2700/19; F25B2700/193; F25B2700/1933; F25B2700/21; F25B2700/2115; F25B2700/21151; F25B2700/2116; F25B2700/21161; F25B2700/2117; F25B2700/21171; F25B2700/21172
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
127 words
An environmental control system comprising: a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser having an inlet connected with said compressor outlet and an outlet, and an evaporator having an inlet connected with said condenser outlet and an outlet connected with said compressor outlet; a variable speed evaporator fan for moving air across said evaporator; compressor speed control means for controlling the speed of said compressor to produce a particular amount of cooling; monitor means for monitoring the superheat condition at the inlet of said compressor; and primary superheat control means responsive to said monitor means for establishing at least in part the speed of said evaporator fan in a manner that will tend to maintain a predetermined superheat condition.
Claim 2
Dependent Claim
127 words
An environmental control system comprising: a refrigeration loop including a variable speed compressor having an inlet and an outlet, a condenser having an inlet connected with said compressor outlet and an outlet, and an evaporator having an inlet connected with said condenser outlet and an outlet connected with said compressor outlet; a variable speed evaporator fan for moving air across said evaporator; compressor speed control means for controlling the speed of said compressor to produce a particular amount of cooling; monitor means for monitoring the superheat condition at the inlet of said compressor; and primary superheat control means responsive to said monitor means for establishing at least in part the speed of said evaporator fan in a manner that will tend to maintain a predetermined superheat condition.
Claim 3
Dependent Claim
51 words
The system in claim 1 including a variable speed condenser fan for moving air across said condenser and secondary superheat control means responsive to said monitor means for establishing at least in part the speed of said condenser fan in a manner that will tend to maintain a predetermined superheat condition.
Claim 4
Dependent Claim
27 words
The system in claim 2 including means for actuating said secondary superheat control means only when said speed of said evaporator fan is at a predetermined speed.
Claim 5
Dependent Claim
41 words
The system in claim 2 including tertiary superheat control means responsive to said monitor means for modifying the speed of said compressor established by said compressor speed control means in a manner that will tend to maintain a predetermined superheat condition.
Claim 6
Dependent Claim
27 words
The system in claim 4 including means for actuating said tertiary superheat control means only when said speed of said condenser fan is at a predetermined speed.
Claim 7
Dependent Claim
47 words
The system in claim 1 including evaporator temperature measuring means for measuring the temperature of said evaporator, wherein said speed of said evaporator fan is a function of the difference between a temperature setting and the temperature of the air as measured by recirculated air temperature sensors.
Claim 8
Dependent Claim
32 words
The system in claim 2 including condenser air inlet temperature measuring means for measuring the temperature of said condenser, wherein said speed of said condenser is a function of said condenser temperature.
Claim 9
Dependent Claim
21 words
The system in claim 1 wherein said monitor means includes means for measuring the temperature within said compressor at its inlet.
Claim 10
Dependent Claim
34 words
The system in claim 8 wherein said monitor means further includes means for measuring the pressure within said compressor at its inlet and means for comparing said temperature and said pressure within said compressor.
References Cited (Backward Citations)
US2047827A
Cited
US2959929A
Cited
US3667245A
Cited
US3803863A
Cited
US3786650A
Cited
US4506518A
Cited
US4660387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-18 | 1997-04-19 | 1997-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-18 | 2001-04-19 | 2001-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-18 | 2005-04-19 | 2005-10-19 | $7700.00 | Window Closed / Lapsed |