Patent US4885704A successfully refreshed from Google Patents.
Patent US4164879A successfully refreshed from Google Patents.
US5115643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating air conditioner
Assignee: Hitachi Ltd
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Filing: 1990-11-30
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Granted: 1992-05-26
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Expires: 2010-11-30
Abstract
Abstract Disclosed is a method for operating an air conditioner which is basically composed of an outdoor unit and an indoor unit and whose operation is controlled on the basis of values measured by a plurality of temperature sensors. When any one of the plural sensors is disabled due to wire disconnection, short-circuit or like trouble, and when a specific sensor which has a complementary relation with the disabled sensor with respect to the heat cycle or which has an object of measurement substantially the same as that of the disabled sensor is normally functioning without any wire disconnection, short-circuit or like trouble, the value measured by the specific sensor is based to presume the value that will be measured by the disabled sensor if the disabled sensor functions normally, and the operation of the air conditioner is continued on the basis of the presumed value.
Inventors
- 👤 Yoshiki Hayata
- 👤 Masashi Watanabe
- 👤 Kisuke Tashiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:10
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02; F24; F24F; F24F11/00; F24F11/30; F24F11/32; F24F11/38; F24F11/50; F24F11/56; F24F11/62; F24F11/63; F25B13/00; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1917; F24F2110/00; F24F2110/10; F24F2110/12; F24F2140/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A method for operating an air conditioner to supply conditioned air to a room, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by a plurality of temperature sensors including a suction air temperature sensor disposed in the indoor unit for measuring the temperature of suction air flow supplied to a heat exchanger in the indoor unit, and a radiation temperature sensor disposed in the indoor unit to measure the radiation temperature in the room, said suction air temperature sensor having a complementary relation with said radiation temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said suction air temperature sensor; replacing a value measured by said suction air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a value measured by said radiation temperature sensor if said radiation temperature sensor is operating normally; continuing the operation of said air conditioner by controlling the air conditioner with the value measured by said radiation temperature sensor.
Claim 2
Independent Claim
178 words
A method for operating an air conditioner to supply conditioned air to a room, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by a plurality of temperature sensors including a suction air temperature sensor disposed in the indoor unit for measuring the temperature of suction air flow supplied to a heat exchanger in the indoor unit, and a radiation temperature sensor disposed in the indoor unit to measure the radiation temperature in the room, said suction air temperature sensor having a complementary relation with said radiation temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said suction air temperature sensor; replacing a value measured by said suction air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a value measured by said radiation temperature sensor if said radiation temperature sensor is operating normally; continuing the operation of said air conditioner by controlling the air conditioner with the value measured by said radiation temperature sensor.
Claim 3
Independent Claim
210 words
A method for operating an air conditioner to supply conditioned air, when the air conditioner is in a heating mode, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by values of a plurality of temperature sensors including a discharge air temperature sensor disposed in the indoor unit for measuring the temperature of discharge air flow discharged from a heat exchanger within the indoor unit and a freezing temperature sensor for measuring the temperature of a refrigerant flowing into said heat exchanger within the indoor unit, said discharge air temperature sensor having a complementary relation with said freezing temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said discharge air temperature sensor disposed in the indoor unit; replacing a value measured by said discharge air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a sum of a value measured by said freezing temperature sensor and said predetermined value β if said freezing sensor is operating normally, and continuing the operation of the air conditioner by controlling the air conditioner with the sum of the value measured by said freezing temperature sensor and the predetermined value β.
Claim 4
Independent Claim
210 words
A method for operating an air conditioner to supply conditioned air, when the air conditioner is in a heating mode, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by values of a plurality of temperature sensors including a discharge air temperature sensor disposed in the indoor unit for measuring the temperature of discharge air flow discharged from a heat exchanger within the indoor unit and a freezing temperature sensor for measuring the temperature of a refrigerant flowing into said heat exchanger within the indoor unit, said discharge air temperature sensor having a complementary relation with said freezing temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said discharge air temperature sensor disposed in the indoor unit; replacing a value measured by said discharge air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a sum of a value measured by said freezing temperature sensor and said predetermined value β if said freezing sensor is operating normally, and continuing the operation of the air conditioner by controlling the air conditioner with the sum of the value measured by said freezing temperature sensor and the predetermined value β.
Claim 5
Independent Claim
254 words
A method for operating an air conditioner to supply conditioned air, when the air conditioner is in a cooling mode, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by values of a plurality of temperature sensors including a discharge air temperature sensor disposed in the indoor unit for measuring the temperature of discharge air flow discharge from a heat exchanger in the indoor unit, a section air temperature sensor disposed in the indoor unit for measuring the temperature of suction air flow supplied to said indoor heat exchanger and a freezing temperature sensor for measuring the temperature of a refrigerant flowing into said indoor heat exchanger, said discharge air temperature sensor having a complementary relation with said suction air temperature sensor and said freezing temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said discharge air temperature sensor disposed in the indoor unit; replacing a value measured by said discharge air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a sum of a value measured by suction air temperature sensor and a value measured by said freezing temperature sensor if said suction air temperature sensor and said freezing temperature sensor is operating normally; and continuing the operation of the air conditioner by controlling the air conditioner with the sum of the value measured by said suction air temperature sensor and the value measured by said discharge air temperature sensor.
Claim 6
Independent Claim
254 words
A method for operating an air conditioner to supply conditioned air, when the air conditioner is in a cooling mode, comprising an outdoor unit and an indoor unit, said air conditioner being controlled by values of a plurality of temperature sensors including a discharge air temperature sensor disposed in the indoor unit for measuring the temperature of discharge air flow discharge from a heat exchanger in the indoor unit, a section air temperature sensor disposed in the indoor unit for measuring the temperature of suction air flow supplied to said indoor heat exchanger and a freezing temperature sensor for measuring the temperature of a refrigerant flowing into said indoor heat exchanger, said discharge air temperature sensor having a complementary relation with said suction air temperature sensor and said freezing temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and short circuit of said discharge air temperature sensor disposed in the indoor unit; replacing a value measured by said discharge air temperature sensor after the at least one of the wire disconnection and short circuit is detected with a sum of a value measured by suction air temperature sensor and a value measured by said freezing temperature sensor if said suction air temperature sensor and said freezing temperature sensor is operating normally; and continuing the operation of the air conditioner by controlling the air conditioner with the sum of the value measured by said suction air temperature sensor and the value measured by said discharge air temperature sensor.
Claim 7
Independent Claim
218 words
A method for operating an air conditioner to supply conditioned air, comprising an indoor unit and an outdoor unit when the air conditioner is in a cooling mode, said air conditioner being controlled by values of a plurality of temperature sensors including a freezing temperature sensor for measuring the temperature of a refrigerant flowing into a heat exchanger in the indoor unit and a compressor suction gas temperature sensor disposed in the outdoor unit for measuring the temperature of suction gas flow supplied to a compressor in the outdoor unit, said freezing temperature sensor having a complementary relation with said compressor suction gas temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and a short circuit of said freezing temperature sensor, replacing a value of said freezing temperature sensor after the at least one of the wire disconnection and the short circuit is detected with a predetermined value γ when the value measured by said compressor suction gas temperature sensor is larger than the predetermined value γ if said compressor suction gas temperature sensor is operating normally; continuing operation of the air conditioner by controlling the air conditioner with the predetermined value γ when the value measured by said compressor suction gas temperature sensor is larger than the predetermined value γ.
Claim 8
Independent Claim
218 words
A method for operating an air conditioner to supply conditioned air, comprising an indoor unit and an outdoor unit when the air conditioner is in a cooling mode, said air conditioner being controlled by values of a plurality of temperature sensors including a freezing temperature sensor for measuring the temperature of a refrigerant flowing into a heat exchanger in the indoor unit and a compressor suction gas temperature sensor disposed in the outdoor unit for measuring the temperature of suction gas flow supplied to a compressor in the outdoor unit, said freezing temperature sensor having a complementary relation with said compressor suction gas temperature sensor, said method comprising the steps of: detecting at least one of a wire disconnection and a short circuit of said freezing temperature sensor, replacing a value of said freezing temperature sensor after the at least one of the wire disconnection and the short circuit is detected with a predetermined value γ when the value measured by said compressor suction gas temperature sensor is larger than the predetermined value γ if said compressor suction gas temperature sensor is operating normally; continuing operation of the air conditioner by controlling the air conditioner with the predetermined value γ when the value measured by said compressor suction gas temperature sensor is larger than the predetermined value γ.
Claim 9
Dependent Claim
156 words
A method for operating an air conditioner according to claim 4, wherein the plurality of temperature sensors further includes: a discharge air temperature sensor disposed in the indoor unit for measuring the temperature of discharge air flow discharged from said indoor heat exchanger and a suction air temperature sensor disposed in the indoor unit for measuring the temperature of suction air flow supplied to said indoor heat exchanger, said method further comprises the steps of: detecting at least one of wire disconnection and short circuit of said compressor suction gas temperature sensor disposed in the indoor unit; replacing the value measured by said freezing temperature sensor after the malfunction is detected with a value obtained by subtracting a value measured by the suction air temperature sensor from a value measured by said discharge air temperature sensor; continuing the operation of the air conditioner by controlling the air conditioner with the value obtained by the subtraction value.
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) | 1995-05-26 | 1995-11-25 | 1996-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-26 | 1999-11-25 | 2000-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-26 | 2003-11-25 | 2004-05-26 | $7700.00 | Window Closed / Lapsed |