US3684170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus
Assignee: Carrier Corp
•
Filing: 1970-07-27
•
Granted: 1972-08-15
•
Expires: 1990-07-27
Abstract
Abstract Apparatus for supplying treated air to an enclosure, including heat exchanger through which a heat exchange medium flows and a fan arranged to route air to be treated over the heat exchanger in heat transfer relation with the medium. The temperature of the air in the enclosure is sensed and the area of the outlet provided for discharging the treated air into the enclosure is modulated in response to the temperature of the enclosure. A variable control signal, the magnitude thereof being related to the area of the outlet, is generated and is supplied to a control operable to vary the speed of the fan motor to maintain a substantially constant static pressure in the air passage regardless of the area of the outlet, to maintain a substantially constant discharge velocity.
Inventors
- 👤 Ronald L Roof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:06
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; G05D23/1906; G05D23/1919
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
153 words
A method of regulating the temperature of air circulating within an enclosure havinG communication with a structure serving as an air passage and provided with at least one outlet through which treated air is delivered, comprising the steps of: A. sensing the temperature of the air in the enclosure; B. creating a first variable electronic control signal which is a function of the sensed temperature; C. modulating the area of the outlet from the air passage, as a function of the first control signal; D. generating a second variable electronic control signal which is a function of the position of the outlet; and E. discharging the treated air into the enclosure at a substantially constant velocity irrespective of the area of the outlet by maintaining a substantially constant static pressure in the air passage by varying the quantity of air delivered to the air passage in response to the second variable control signal.
Claim 2
Independent Claim
153 words
A method of regulating the temperature of air circulating within an enclosure havinG communication with a structure serving as an air passage and provided with at least one outlet through which treated air is delivered, comprising the steps of: A. sensing the temperature of the air in the enclosure; B. creating a first variable electronic control signal which is a function of the sensed temperature; C. modulating the area of the outlet from the air passage, as a function of the first control signal; D. generating a second variable electronic control signal which is a function of the position of the outlet; and E. discharging the treated air into the enclosure at a substantially constant velocity irrespective of the area of the outlet by maintaining a substantially constant static pressure in the air passage by varying the quantity of air delivered to the air passage in response to the second variable control signal.
Claim 3
Dependent Claim
183 words
Air conditioning apparatus for regulating the temperature of air circulating within an enclosure having communication with a structure serving as an air passage and provided with at least one outlet through which treated air is delivered, comprising: A. means for sensing the temperature of the air in the enclosure; B. means for supplying a first variable electronic control signal which is a function of the sensed temperature; C. means operable for receiving the first control signal, including means to modulate the area of the outlet from the air passage as a function of the magnitude of the control signal; D. means operable to generate a second variable electronic control signal which is a function of the area of the outlet; and E. means to discharge treated air into the enclosure at a substantially constant velocity irrespective of the area of the outlet, said means including means responsive to said second variable control signal to regulate the quantity of treated air passing through the air passage to maintain a substantially constant static pressure in the air passage regardless of the area of said outlet.
Claim 4
Dependent Claim
183 words
Air conditioning apparatus for regulating the temperature of air circulating within an enclosure having communication with a structure serving as an air passage and provided with at least one outlet through which treated air is delivered, comprising: A. means for sensing the temperature of the air in the enclosure; B. means for supplying a first variable electronic control signal which is a function of the sensed temperature; C. means operable for receiving the first control signal, including means to modulate the area of the outlet from the air passage as a function of the magnitude of the control signal; D. means operable to generate a second variable electronic control signal which is a function of the area of the outlet; and E. means to discharge treated air into the enclosure at a substantially constant velocity irrespective of the area of the outlet, said means including means responsive to said second variable control signal to regulate the quantity of treated air passing through the air passage to maintain a substantially constant static pressure in the air passage regardless of the area of said outlet.
Claim 5
Dependent Claim
58 words
Air conditioning apparatus in accordance with claim 2 wherein said means operable to receive said first control signal includes an operational amplifier, and first and second diodes, said second diode being operable to permit passage of only a negative polarity voltage signal, and said first diode being operable to permit passage of only a positive polarity voltage signal.
Claim 6
Dependent Claim
52 words
Air conditioning apparatus in accordance with claim 3 wherein said means responsive to said second variable control signal includes a trigger diode and a bi-directional gated solid state switch. 5 Air conditioning apparatus in accordance with claim 4 including means for selectively operating the apparatus on either heating mode or cooling mode.
Claim 7
Dependent Claim
22 words
Air conditioning apparatus in accordance with claim 2 including means for selectively operating the apparatus on either heating mode or cooling mode.
References Cited (Backward Citations)
US2154523A
Cited
US2196687A
Cited
US2273000A
Cited
US2278016A
Cited
US2407036A
Cited
US3414193A
Cited
US3489345A
Cited
US3486693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |