US3595028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means for air-conditioning system
Assignee: General Electric Co
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Filing: 1969-10-02
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Granted: 1971-07-27
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Expires: 1989-10-02
Abstract
Abstract In an air conditioner there is provided a thermistor to sense the dry bulb temperature of the air entering the evaporator coil and another thermistor to sense the dry bulb temperature of the air leaving the evaporator coil. The thermistors are electrically connected into a control circuit so that the air conditioner is controlled by the combined resistance of the two thermistors. The air conditioner is thus controlled in response to both the temperature and the humidity of the air being cooled.
Inventors
- 👤 Paul D Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:18
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/30; F24F11/70; F24F11/80; F24F11/86; F24F11/88; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1927; G05D23/193; G05D23/1931; G05D23/20; G05D23/24; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
In an air-conditioning system, including a refrigeration system comprising a compressor, a condenser and a heat exchanger to cool aiR passing therethrough, control means comprising: first sensing means to sense the dry bulb temperature of the air entering said heat exchanger, second sensing means to sense the dry bulb temperature of the air leaving said heat exchanger, and means to deenergize and energize the air-conditioning refrigeration system compressor in response to the concurrent temperature conditions sensed by said first sensing means and said second sensing means such that control of the energization of the air-conditioning refrigeration system compressor is a function of both the humidity and the temperature of the air being cooled.
Claim 2
Dependent Claim
113 words
In an air-conditioning system, including a refrigeration system comprising a compressor, a condenser and a heat exchanger to cool aiR passing therethrough, control means comprising: first sensing means to sense the dry bulb temperature of the air entering said heat exchanger, second sensing means to sense the dry bulb temperature of the air leaving said heat exchanger, and means to deenergize and energize the air-conditioning refrigeration system compressor in response to the concurrent temperature conditions sensed by said first sensing means and said second sensing means such that control of the energization of the air-conditioning refrigeration system compressor is a function of both the humidity and the temperature of the air being cooled.
Claim 3
Dependent Claim
56 words
The invention of claim 1 wherein said means to deenergize and energize the air-conditioning refrigeration system compressor comprises a control circuit including at least one solid-state device to control energization of the air-conditioning refrigeration system compressor and said first and second sensing means comprise thermistors, said thermistors providing a combined resistance which controls said solid-state device.
Claim 4
Dependent Claim
39 words
The invention of claim 1 wherein at least one of said sensing means comprises a thermistor and said means to deenergize and energize the air-conditioning refrigeration system compressor comprises a control circuit responsive to the resistance of said thermistor.
Claim 5
Dependent Claim
12 words
The invention of claim 1 wherein said heat exchanger comprises an evaporator.
Claim 6
Dependent Claim
42 words
The invention of claim 4 wherein said first sensing means comprises a thermistor upstream of said evaporator with respect to the airflow therethrough and said second sensing means comprises a thermistor positioned downstream of said evaporator with respect to the airflow therethrough.
Claim 7
Dependent Claim
146 words
In control means for controlling the operation of an air conditioner having a refrigeration system including a compressor, a condenser and an evaporator for cooling air passing therethrough with said control means including electrical components electrically interconnected to deenergize and energize said air conditioner refrigeration system compressor in response to variation of resistance interconnected with said electrical components, the improvement comprising: a first thermistor positioned upstream of the evaporator to sense the dry bulb temperature of the air entering the evaporator, a second thermistor positioned downstream of the evaporator to sense the dry bulb temperature of the air leaving the evaporator, and means electrically interconnecting said first thermistor and said second thermistor with the electrical components such that said first thermistor and said second thermistor jointly provide the resistance in response to the variation of which the air conditioner refrigeration system compressor is deenergized and energized.
Claim 8
Dependent Claim
146 words
In control means for controlling the operation of an air conditioner having a refrigeration system including a compressor, a condenser and an evaporator for cooling air passing therethrough with said control means including electrical components electrically interconnected to deenergize and energize said air conditioner refrigeration system compressor in response to variation of resistance interconnected with said electrical components, the improvement comprising: a first thermistor positioned upstream of the evaporator to sense the dry bulb temperature of the air entering the evaporator, a second thermistor positioned downstream of the evaporator to sense the dry bulb temperature of the air leaving the evaporator, and means electrically interconnecting said first thermistor and said second thermistor with the electrical components such that said first thermistor and said second thermistor jointly provide the resistance in response to the variation of which the air conditioner refrigeration system compressor is deenergized and energized.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |