US4949548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for controlling the operation of a refrigerating unit
Assignee: Individual
•
Filing: 1989-02-10
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Granted: 1990-08-21
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Expires: 2009-02-10
Abstract
Abstract With a process for controlling the operating of a refrigerating unit with an evaporator and a fan, the fan being cut in and cut out independently of the refrigerating unit, which is cut in at a predetermined cut-in temperature, above a set value, and is cut out at a predetermined cut-out temperature, below the set value, to save energy for the refrigerating operation, whenever there is a cutting-out operation of the refrigerating unit, the fan likewise cuts out and then cuts in again as soon as a predetermined cut-in temperature of the fan, lying below the cut-in temperature of the refrigerating unit, is reached.
Inventors
- 👤 Friedhelm Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:39
CPC Classifications
F; F25; F25B; F25B49/00; F25D; F25D17/00; F25D17/04; F25D17/06; F25D17/067; F25B2600/00; F25B2600/11; F25B2600/112; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
Process for controlling the operation of a refrigerating unit with an evaporator fan, whereiin the evaporator fan and unit are programmed to sense and be responsive to air temperatures cooled by the refrigeration unit and said fan is connected to cut in and cut out independently of the refrigeration unit, which refrigeration unit is programmed to be cut in at a predetermined cut-in temperature lying above a preset temperature, and is cut out at a predetermined cut-out temperature lying below said preset temperature, characterized in that, upon a cutting-out operation of the refrigeration unit, the fan is programed to be likewise cut out or to remain cut out and said fan is programmed to be cut in again as soon as a predetermined cut-in temperature of the fan, lying below the cut-in temperature of the refrigeration unit, is reached.
Claim 2
Dependent Claim
139 words
Process for controlling the operation of a refrigerating unit with an evaporator fan, whereiin the evaporator fan and unit are programmed to sense and be responsive to air temperatures cooled by the refrigeration unit and said fan is connected to cut in and cut out independently of the refrigeration unit, which refrigeration unit is programmed to be cut in at a predetermined cut-in temperature lying above a preset temperature, and is cut out at a predetermined cut-out temperature lying below said preset temperature, characterized in that, upon a cutting-out operation of the refrigeration unit, the fan is programed to be likewise cut out or to remain cut out and said fan is programmed to be cut in again as soon as a predetermined cut-in temperature of the fan, lying below the cut-in temperature of the refrigeration unit, is reached.
Claim 3
Dependent Claim
59 words
Process according to claim 1, characterized in that, within the temperature difference (ΔT K ) between cut-in temperature and cut-out temperature (T ek and T aK , respectively) of the refrigerating unit, a smaller temperature difference (ΔT V ) between a cut-in temperature and a cut-out temperature (T eV and T aV , respectively) of the fan is preselected.
References Cited (Backward Citations)
US4467617A
Cited
US4485633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |