US3927712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic control system of an air conditioning apparatus
Assignee: Iwatani Corp
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Filing: 1974-10-11
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Granted: 1975-12-23
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Expires: 1994-10-11
Abstract
Abstract An electronic control system for an air conditioning apparatus comprising hand-operated cooling and drying switches, a compressor starting timer, a temperature regulating circuit, a dehydration timer, and a fan control cirucit. The temperature regulating circuit includes a hand-operated variable resistor to preset temperatures as desired; the temperature regulating circuit controls the compressor starting timer; and the dehydration timer controls the compressor starting timer and the temperature regulating circuit.
Inventors
- 👤 Hiroshi Nakayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:17
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/50; F24F11/61; F24F11/70; F24F11/72; F24F11/74; F24F11/77; F24F11/80; F24F11/83; F24F11/84; F24F11/86; F24F11/88; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1912; G05D23/20; G05D23/24; F24F11/30; F24F2110/00; F24F2110/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A control system for an air conditioning apparatus having a compressor and fan comprising: compressor relay means for activating the compressor, compressor starting timer circuit means connected to the compressor relay means for controlling the duration of operation of the compressor, temperature regulating circuit means connected to said compressor starting timer circuit means for controlling the compressor operation in response to a sensed temperature, dehydration timer circuit means connected to said temperature regulating circuit means and said coMpressor starting timer circuit means for controlling said compressor according to a timed cycle, power circuit means, and switch means for connecting said power circuit means to said compressor starting timer circuit means, said temperature regulating circuit means and dehydration timer circuit means.
Claim 2
Dependent Claim
120 words
A control system for an air conditioning apparatus having a compressor and fan comprising: compressor relay means for activating the compressor, compressor starting timer circuit means connected to the compressor relay means for controlling the duration of operation of the compressor, temperature regulating circuit means connected to said compressor starting timer circuit means for controlling the compressor operation in response to a sensed temperature, dehydration timer circuit means connected to said temperature regulating circuit means and said coMpressor starting timer circuit means for controlling said compressor according to a timed cycle, power circuit means, and switch means for connecting said power circuit means to said compressor starting timer circuit means, said temperature regulating circuit means and dehydration timer circuit means.
Claim 3
Dependent Claim
35 words
A control system as recited in claim 1 further comprising: a fan control circuit for energizing said fan, and manually adjustable variable resistor means connected to said fan control circuit for controlling the fan speed.
Claim 4
Dependent Claim
36 words
A control system as recited in claim 2 further comprising: night timer circuit means connected to said compressor starting timer circuit means and said fan control circuit for operating said compressor and fan at predetermined intervals.
Claim 5
Dependent Claim
87 words
A control system as recited in claim 2 wherein said fan control circuit comprises: a silicon controlled rectifier, a relaxation oscillator having a programmable unijunction transistor (PUT) connected to said silicon controlled rectifier for controlling the firing phase angle thereof, said silicon controlled rectifier connected to said power circuit means, resistance means connected to said relaxation oscillator, terminal means connected to bypass said resistance means for establishing a short circuit therebetween, whereby said fan control circuit is operative at high and low frequencies of said power source.
Claim 6
Dependent Claim
58 words
A control system as recited in claim 1 wherein said apparatus comprises a heater and said control system further comprises: heater relay means for activating said heater, said heater relay means connected to said temperature regulating circuit means, and heater switch means for connecting said heater relay means and said temperature regulating circuit means to said power source.
Claim 7
Dependent Claim
25 words
A control system as recited in claim 5 further comprising a master switch for simultaneously turning off said switch means and said heater switch means.
Claim 8
Dependent Claim
55 words
A control system as recited in claim 1 wherein said compressor starting timer circuit means comprises: a programmable unijunction transistor (PUT) having a gate, anode and cathode, capacitor means connected to the gate of said PUT for controlling the turning on and off of said PUT, and said compressor relay means controlled by said PUT.
Claim 9
Dependent Claim
72 words
A control system as recited in claim 1 wherein said dehydration timer circuit means comprises: a relaxation oscillator having a programmable unijunction transistor (PUT), compacitor means coupled to a gate of said PUT, monostable multivibrator means connected to said PUT and having output pulses triggered by said relaxation oscillator, means for connecting said output pulses to said capacitor means for charging same, and said compacitor means discharging to render said PUT conductive.
References Cited (Backward Citations)
US3636369A
Cited
US3864611A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |