Patent US4611756A successfully refreshed from Google Patents.
US4611756A
Expired / Lapsed
US
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Controller for fan motor of air conditioner
Assignee: Nissan Motor Co Ltd
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Filing: 1984-12-27
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Granted: 1986-09-16
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Expires: 2004-12-27
Abstract
Abstract A controller for a fan motor of an air conditioner in a vehicle according to the present invention is constructed to control the magnitude of a stream of air sent from an electric fan into a room of the vehicle so that the magnitude of a stream of air is reduced when a temperature of the outside air of the room falls down below a predetermined temperature in the heating mode of the air conditioner.
Inventors
- 👤 Toshio Ohashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:45
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/00642; B60H1/00814; B60H1/00821; B60H1/00828; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1906; G05D23/1909; G05D23/275
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
142 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the revolution of the motor to adjust the magnitude of a stream of air sent from the fan in a range from a powerful stream of air to a weak stream of air; detection means for sensing a temperature of the air outside the room; control means for reducing the magnitude of a stream of air from the fan when said detection means detects that the temperature of the outside air falls down below a predetermined temperature; and a resistance element having a positive temperature characteristic interposed between said fan motor and a power supply, said resistance element being exposed to air circulated by said fan.
Claim 2
Dependent Claim
142 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the revolution of the motor to adjust the magnitude of a stream of air sent from the fan in a range from a powerful stream of air to a weak stream of air; detection means for sensing a temperature of the air outside the room; control means for reducing the magnitude of a stream of air from the fan when said detection means detects that the temperature of the outside air falls down below a predetermined temperature; and a resistance element having a positive temperature characteristic interposed between said fan motor and a power supply, said resistance element being exposed to air circulated by said fan.
Claim 3
Dependent Claim
57 words
A controller according to claim 1, wherein said adjusting means comprises a plurality of resistors connected in series to said motor and a fan switch which is operated to short each of said resistors so that the resistance value of said resistors connected in series to said motor is varied to change the revolution of said motor.
Claim 4
Dependent Claim
33 words
A controller according to claim 1, wherein said detection means comprises an outside temperature sensitive switch which is turned on when the outside temperature of the vehicle falls down below a predetermined temperature.
Claim 5
Dependent Claim
39 words
A controller according to claim 2, wherein said control means comprises relay means which is operated to release the short circuit by said fan switch so that the magnitude of a stream of air from the fan is reduced.
Claim 6
Dependent Claim
49 words
A controller according to claim 1, wherein said adjusting means is constructed to change the revolution of said motor in stages so that the magnitude of a stream of air from the fan is adjusted in stages from a powerful stream of air to a weak stream of air.
Claim 7
Dependent Claim
37 words
A controller according to claim 5, wherein said control means is operated to reduce the magnitude of a stream of air by one step when the temperature of the outside air falls down below a predetermined temperature.
Claim 8
Dependent Claim
22 words
A controller according to claim 2, wherein one of said plurality of resistors is said resistance element having a positive temperature characteristic.
Claim 9
Dependent Claim
116 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the operational speed of the motor by a multi-step change-over switch having resistors interposed between the switch and the motor; detection means for sensing a temperature of the air outside the room; and means for interposing another resistor only between the motor and the terminal of the multi-step change-over switch corresponding to the position in which the motor operates at the highest operational speed, in response to the signal of the detection means detecting a temperature below a predetermined level.
Claim 10
Dependent Claim
116 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the operational speed of the motor by a multi-step change-over switch having resistors interposed between the switch and the motor; detection means for sensing a temperature of the air outside the room; and means for interposing another resistor only between the motor and the terminal of the multi-step change-over switch corresponding to the position in which the motor operates at the highest operational speed, in response to the signal of the detection means detecting a temperature below a predetermined level.
Claim 11
Dependent Claim
126 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the revolution of the motor to adjust the magnitude of a stream of air sent from the fan in a range from a powerful stream of air to a weak stream of air; detection means for sensing a temperature of the air outside the room; and control means for reducing the magnitude of a stream of air from the fan to prevent a reduction in temperature in the room of the vehicle when said detection means detects that the temperature of the outside air falls down below a predetermined temperature.
Claim 12
Dependent Claim
126 words
A controller for a fan motor of an air conditioner in a vehicle in which the fan motor drives a blowing fan to send air into a room of the vehicle, comprising: adjusting means for changing the revolution of the motor to adjust the magnitude of a stream of air sent from the fan in a range from a powerful stream of air to a weak stream of air; detection means for sensing a temperature of the air outside the room; and control means for reducing the magnitude of a stream of air from the fan to prevent a reduction in temperature in the room of the vehicle when said detection means detects that the temperature of the outside air falls down below a predetermined temperature.
Claim 13
Dependent Claim
14 words
A controller according to claim 9, wherein said predetermined temperature is about 0° C.
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) | 1989-09-15 | 1990-03-17 | 1990-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-15 | 1994-03-17 | 1994-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-15 | 1998-03-17 | 1998-09-16 | $7700.00 | Window Closed / Lapsed |