US3877638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature controlling apparatus for automatic air conditioning
Assignee: Hitachi Ltd
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Filing: 1973-10-05
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Granted: 1975-04-15
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Expires: 1993-10-05
Abstract
Abstract A temperature controlling apparatus for automatic air conditioning wherein a heat-generating member is provided in connection with a member displacing in response to the change of temperature, that is, a temperature sensing member, the heatgenerating member being adapted to receive an electric output corresponding to the detected temperature to convert the electric output into a pressure, and the temperature sensing member being adapted to detect a surrounding temperature. The force generated by the temperature sensing member is balanced with the force due to a gas pressure bearing against a movable member within an output pressure chamber communicated to a source of gas pressure so as to operate an actuator communicating to the output pressure chamber with a gas pressure corresponding to the detected temperature, thereby to carry out air conditioning for a car room or the like.
Inventors
- 👤 Matsuo Amano
- 👤 Ichiro Kimura
- 👤 Tosikatsu Ito
- 👤 Katsuo Kanemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:27
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00421; B60H1/00435; B60H1/00442; B60H1/00485; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1925; G05D23/20; G05D23/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
183 words
A temperature controlling apparatus for automatic air conditioning comprising: means for detecting the temperature of at least one place and providing an electric output corresponding to that temperature; means for generating heat in response to said electric output; means displaceable in response to the heat from said heat generating means and a temperature in the surroundings of the apparatus; a source of gas pressure; an output pressure chamber communicated with said source by a first communicating means, said output pressure chamber being defined in part by movable means movable in substantially the same direction as that of the pressure which acts upon the internal surface of said movable means of said chamber, and having a second communicating means for communicating said chamber with an actuator operated by the pressure from the chamber and passage means communicating with the atmosphere; means for transmitting the displacement of said displaceable means to said movable means; and means for controlling at least one of said first communicating means and said passage means so as to restore said movable means when displaced in response to said displaceable means.
Claim 2
Dependent Claim
183 words
A temperature controlling apparatus for automatic air conditioning comprising: means for detecting the temperature of at least one place and providing an electric output corresponding to that temperature; means for generating heat in response to said electric output; means displaceable in response to the heat from said heat generating means and a temperature in the surroundings of the apparatus; a source of gas pressure; an output pressure chamber communicated with said source by a first communicating means, said output pressure chamber being defined in part by movable means movable in substantially the same direction as that of the pressure which acts upon the internal surface of said movable means of said chamber, and having a second communicating means for communicating said chamber with an actuator operated by the pressure from the chamber and passage means communicating with the atmosphere; means for transmitting the displacement of said displaceable means to said movable means; and means for controlling at least one of said first communicating means and said passage means so as to restore said movable means when displaced in response to said displaceable means.
Claim 3
Dependent Claim
78 words
The temperature controlling apparatus for automatic air conditioning according to claim 1, wherein said heat generating means and said displaceable means consist of a heat-generating resistor and a U-shaped bimetallic strip, respectively, said heat-generating resistor being wound spirally around said U-shaped bimetallic strip, and said U-shaped bimetallic strip having one end coupled to means for coupling the displacement of said displaceable means to said movable means and the other end coupled to a fixed member of the apparatus.
Claim 4
Dependent Claim
88 words
The temperature controlling apparatus for automatic air conditioning according to claim 2, wherein said passage means is provided in a movable portion of said movable means, and said first communicating means and cOntrolling means include a first valve body for controlling said passage means, a second valve body for controlling said first communicating means, means for interconnecting said first and second valve bodies and means for applying to said bodies such a force as to allow them to close said passage means and said first communicating means simultaneously.
Claim 5
Dependent Claim
54 words
The temperature controlling apparatus for automatic air conditioning according to claim 3, wherein said temperature detecting means consists of a plurality of thermistors connected in service to each other so as to detect temperatures at different places and provide an electrical output adapted to be transmitted to said heat generating means through an amplifier.
Claim 6
Dependent Claim
25 words
The temperature controlling apparatus for automatic air conditioning according to claim 4, wherein said source of gas pressure is a source of negative gas pressure.
Claim 7
Dependent Claim
30 words
The temperature controlling apparatus for automatiic air conditioning according to claim 5, wherein as said source of negative pressure a source of negative pressure in an intake manifold is used.
Claim 8
Dependent Claim
69 words
The temperature controlling apparatus for automatic air conditioning according to claim 6, wherein one of said thermistors is mounted in the car room and another thermistor is positioned at the downstream of a heat exchanger, said bimetallic strip is positioned in the vicinity of a car room air conditioning door, and said actuator actuates a damper for controlling the flow of cooled or heated air in said heat exchanger.
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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |