Patent US3865181A successfully refreshed from Google Patents.
US3865181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Central temperature controlling apparatus having separate pressure and temperature control means
Assignee: Panasonic Holdings Corp
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Filing: 1973-02-21
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Granted: 1975-02-11
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Expires: 1993-02-21
Abstract
Abstract A central temperature controlling apparatus for heating or cooling a plurality of rooms with warm or cool air supplied to the individual rooms through respective ducts, with which temperature adjustment of any room can be done without altering the prevailing warm or cool conditions of the other rooms by appropriately controlling the rate of supply of air from a warm or cool air source and rate of supply or absorption of heat.
Inventors
- 👤 Keijiro Mori
- 👤 Masahiro Indo
- 👤 Taro Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:02
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F11/00; F24F11/89; G; G05; G05D; G05D16/00; G05D16/20; G05D16/2006; G05D16/2066; G05D23/00; G05D23/19; G05D23/1906; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A central temperature controlling apparatus comprising: a blower; heat exchanger means for modifying the temperature of air supplied by said blower; a plurality of branch ducts leading the air supplied by said blower to respectively associated individual rooms; means for regulating the rate of supply of air to each of said individual rooms; pressure control means to control the pressure of supply air from said blower in accordance with the pressure of said air in a common path upstream of said branch ducts; and temperature control means to control the transfer of heat between the air supplied by said blower and said heat exchanger in accordance with the temperature of said air in said common path.
Claim 2
Dependent Claim
116 words
A central temperature controlling apparatus comprising: a blower; heat exchanger means for modifying the temperature of air supplied by said blower; a plurality of branch ducts leading the air supplied by said blower to respectively associated individual rooms; means for regulating the rate of supply of air to each of said individual rooms; pressure control means to control the pressure of supply air from said blower in accordance with the pressure of said air in a common path upstream of said branch ducts; and temperature control means to control the transfer of heat between the air supplied by said blower and said heat exchanger in accordance with the temperature of said air in said common path.
Claim 3
Dependent Claim
20 words
A central temperature controlling apparatus according to claim 1, wherein said blower comprises a fan and a fan drive motor.
Claim 4
Dependent Claim
72 words
A central temperature controlling apparatus according to claim 2, wherein said pressure control means includes a pressure detector to detect the pressure of the air in the common path, and an electronic circuit having an amplifier to amplify the detection signal from said pressure detector and means to control the speed of said fan drive motor so as to vary the rate of air supply in accordance with the amplified detection signal.
Claim 5
Dependent Claim
18 words
A central temperature controlling apparatus according to claim 3, wherein said pressure detector includes semiconductor pressure detecting means.
Claim 6
Dependent Claim
69 words
A central temperature controlling apparatus according to claim 2, wherein said pressure control means includes an electronic circuit for controlling the speed of said fan drive motor, said electronic circuit including a bridge having two series sides consisting of respective strain-sensitive resistive elements, said strain-sensitive resistive elements having opposite strain-resistance characteristics to each other and serving the role of detecting the pressure of the air in the common path.
Claim 7
Dependent Claim
71 words
A central temperature controlling apparatus according to claim 2, wherein said pressure control means includes a pressure detector to detect the pressure of the air in the common path, and means for phase controlling the voltage supplied to said fan drive motor to thereby control the speed of said fan drive motor so as to vary the rate of air supply in accordance with the detection signal from said pressure detector.
Claim 8
Dependent Claim
69 words
A central temperature controlling apparatus according to claim 2, wherein said temperature control means includes a heat-sensitive resistive element to detect the temperatures of the air in the common path, a semiconductor amplifier to amplify the detection signal from said heat-sensitive resistive element and means to control the transfer of heat between the air supplied by said blower and said heat exchanger in accordance with the amplified detection signal.
Claim 9
Dependent Claim
57 words
A central temperature controlling apparatus according to claim 3, wherein said pressure detector includes a diaphragm sensitive to the pressure of the air in said common path, a pair of members capable of following the displacement of said diaphragm and a pair of strain-sensitive resistive means adapted to be stressed in opposite directions by said respective members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |