US4722196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling refrigeration cycle capacity
Assignee: Toshiba Corp
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Filing: 1986-10-10
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Granted: 1988-02-02
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Expires: 2006-10-10
Abstract
Abstract In a refrigeration cycle in which a capacity-variable compressor a condenser, an expansion mechanism and an evaporator are connected in the order named, a device for controlling the capacity in the refrigeration cycle comprising a means for detecting the temperature of the compressor or the temperature of the gas discharged therefrom and a control device for limiting the maximum rotational speed of the compressor when the output from the means for detecting the temperature indicates a detected temperature lower than a predetermined level.
Inventors
- 👤 Haruo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:08
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F25B49/025; F25B2600/00; F25B2600/02; F25B2600/021; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
A device for controlling refrigeration cycle capacity comprising: a refrigeration cycle in which a rotary-type compressor, a condenser, an expansion mechanism and an evaporator are connected in the order named; means for detecting at least one of the temperature of a point on said compressor and the temperature of a gas discharged from said compressor; and means for limiting the maximum rotational speed of said compressor when an output signal from said detection means indicates that the detected temperature becomes lower than a predetermined temperature.
Claim 2
Independent Claim
85 words
A device for controlling refrigeration cycle capacity comprising: a refrigeration cycle in which a rotary-type compressor, a condenser, an expansion mechanism and an evaporator are connected in the order named; means for detecting at least one of the temperature of a point on said compressor and the temperature of a gas discharged from said compressor; and means for limiting the maximum rotational speed of said compressor when an output signal from said detection means indicates that the detected temperature becomes lower than a predetermined temperature.
Claim 3
Dependent Claim
81 words
A device as set forth in claim 1 further comprising: means for detecting the temperature of said condenser; and means for obtaining the difference between at least one of the temperature of said point on said compressor and the temperature of the gas discharged therefrom and the temperature of said condenser, whereby in response to an output signal from said means for obtaining the temperature difference, said means for limiting the maximum rotational speed limits the rotational speed of said compressor.
Claim 4
Dependent Claim
29 words
A device as set forth in claim 1 wherein the temperature of said point on said compressor is indicative of the temperature of said gas discharged from said compressor.
References Cited (Backward Citations)
US3411313A
Cited
US3499297A
Cited
JPS551151A
Cited
JPS5926862A
Cited
JPS59185955A
Cited
JPS60253770A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-02-01 | 1991-08-03 | 1992-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-01 | 1995-08-03 | 1996-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-01 | 1999-08-03 | 2000-02-02 | $7700.00 | Window Closed / Lapsed |