US3635282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-conditioning device of automatic ventilation type
Assignee: New Cosmos Electric Co Ltd
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Filing: 1970-06-01
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Granted: 1972-01-18
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Expires: 1990-06-01
Abstract
Abstract An air-conditioning device embodying means for detecting the level of contamination of air in a room, means for heating and/or cooling, an air intake and exhaust and a control device for automatically operating the air intake and exhaust to provide for either recirculation of air within the room when the contamination level is below a selected value or for exchanging air in the room when the contamination level exceeds a predetermined value.
Inventors
- 👤 Koichi Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/007; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0038; F24F11/00; F24F11/30; F24F11/88; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1912; G05D23/20; G05D23/24; F24F11/0001; F24F2011/0002; F24F2110/00; F24F2110/50; F24F2221/00; F24F2221/54; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
225 words
A space air-conditioning system for rooms, buildings and the like comprising an enclosure including air heating and cooling means, gas-detecting means and temperature control means, said enclosure including a fresh air inlet and shutter controlling said inlet, a room air inlet and shutter controlling the last said inlet and a room air outlet, individual means for operating said shutters, room air exhausting means, a fan within said enclosure for delivering air from said inlets to said outlet, means connecting said temperature control means with said heating and cooling means to control the temperature of the air discharged from said outlet, said gas-detecting means including a gas sensing element comprising a metal oxide semiconductor which changes its electroconductivity upon the absorption of gas and producing an output in response thereto, and a control device interconnecting said gas-detecting means with said shutter operating means and said room air exhausting means whereby the sensing of a gas of a predetermined concentration by said gasdetecting means will effect closure of the shutter associated with said room air inlet, open the shutter associated with said fresh air inlet and operatE said room air exhausting means and when the concentration of gas is reduced below a predetermined level said detecting means will close said fresh air inlet, open said room air inlet and terminate operation of said room air exhausting means.
Claim 2
Dependent Claim
225 words
A space air-conditioning system for rooms, buildings and the like comprising an enclosure including air heating and cooling means, gas-detecting means and temperature control means, said enclosure including a fresh air inlet and shutter controlling said inlet, a room air inlet and shutter controlling the last said inlet and a room air outlet, individual means for operating said shutters, room air exhausting means, a fan within said enclosure for delivering air from said inlets to said outlet, means connecting said temperature control means with said heating and cooling means to control the temperature of the air discharged from said outlet, said gas-detecting means including a gas sensing element comprising a metal oxide semiconductor which changes its electroconductivity upon the absorption of gas and producing an output in response thereto, and a control device interconnecting said gas-detecting means with said shutter operating means and said room air exhausting means whereby the sensing of a gas of a predetermined concentration by said gasdetecting means will effect closure of the shutter associated with said room air inlet, open the shutter associated with said fresh air inlet and operatE said room air exhausting means and when the concentration of gas is reduced below a predetermined level said detecting means will close said fresh air inlet, open said room air inlet and terminate operation of said room air exhausting means.
Claim 3
Dependent Claim
16 words
Apparatus according to claim 1 wherein said air temperature controlling means is disposed within said enclosure.
Claim 4
Dependent Claim
40 words
Apparatus according to claim 1 wherein said detector comprises a semiconductor body having a resistance variable in response to the presence of a reductive gas, a pair of electrodes in contact with said body and means for heating said body.
Claim 5
Dependent Claim
26 words
Apparatus according to claim 3 wherein said semiconductor body comprises a metal oxide selected from the group consisting of SnO2, ZnO, Nb2O5, Ta2O5, TiO2, and Fe2O3.
Claim 6
Dependent Claim
89 words
Apparatus according to claim 1 wherein said control means includes a relay having a coil and a plurality of sets of contacts for controlling the opening and closing means for said shutters and the room air exhausting means, a thyristor having a control gate for energizing said relay, circuit means including said detector for producing a predetermined voltage change when contamination of the room air reaches a selected level and means for applying said predetermined voltage to said gate to cause the thyristor to conduct and operate said relay.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |