Patent US4991405A successfully refreshed from Google Patents.
US4991405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive air conditioning system
Assignee: Sanden Corp
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Filing: 1990-08-10
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Granted: 1991-02-12
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Expires: 2010-08-10
Abstract
Abstract An automotive air conditioning system according to the present invention includes a heat pump circuit comprising a first heat exchanger and a second heat exchanger. The first heat exchanger provides cooled or heated air to a passenger compartment. The second heat exchanger is provided with an outside air inlet path that conducts outside air to the second heat exchanger. Passenger compartment air is also conducted to the second heat exchanger by an air conducting path. The flow of air from the passenger compartment and the outside is selectively conducted to the second heat exchanger by a damper that responds to air flow demand.
Inventors
- 👤 Riichi Sakano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:25
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3227; B60H1/00007; B60H1/00207
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
97 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising an evaporator; a second heat exchanger comprising a condensor; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger; third duct means for conducting air from outside said vehicle passenger compartment to said second heat exchanger; and means for selectively opening and closing said first, said second and said third duct means.
Claim 2
Dependent Claim
97 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising an evaporator; a second heat exchanger comprising a condensor; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger; third duct means for conducting air from outside said vehicle passenger compartment to said second heat exchanger; and means for selectively opening and closing said first, said second and said third duct means.
Claim 3
Dependent Claim
20 words
The air conditioning system according to claim 1 wherein said first heat exchanger is disposed in said vehicle passenger compartment.
Claim 4
Dependent Claim
21 words
The air conditioning system according to claim 1 wherein said second heat exchanger is disposed outside of said vehicle passenger compartment.
Claim 5
Dependent Claim
25 words
The air conditioning system according to claim 3 wherein said second heat exchanger is disposed in a vehicle compartment outside of said vehicle passenger compartment.
Claim 6
Dependent Claim
23 words
The air conditioning system according to claim 1 wherein said first, second and third duct means are selectively opened and closed by dampers.
Claim 7
Dependent Claim
115 words
An automobile air conditioning system for controlling the temperature of air in an automobile passenger compartment comprising: a first duct assembly including a first outside air inlet port for admitting outside air to said first duct assembly and a first passenger compartment air inlet port for admitting air from said automobile passenger compartment to said first duct assembly, said first duct assembly further including a first heat exchanger, said first heat exchanger comprising an evaporator: and a second duct assembly including a second air inlet port for admitting air from said passenger compartment to said second duct assembly, said second duct assembly further including a second heat exchanger, said second heat exchanger comprising a condensor.
Claim 8
Dependent Claim
115 words
An automobile air conditioning system for controlling the temperature of air in an automobile passenger compartment comprising: a first duct assembly including a first outside air inlet port for admitting outside air to said first duct assembly and a first passenger compartment air inlet port for admitting air from said automobile passenger compartment to said first duct assembly, said first duct assembly further including a first heat exchanger, said first heat exchanger comprising an evaporator: and a second duct assembly including a second air inlet port for admitting air from said passenger compartment to said second duct assembly, said second duct assembly further including a second heat exchanger, said second heat exchanger comprising a condensor.
Claim 9
Dependent Claim
22 words
The automobile air conditioning system according to claim 6 wherein said first and second air inlet ports are selectively controlled by dampers.
Claim 10
Dependent Claim
22 words
The automobile air conditioning system according to claim 6 wherein said second heat exchanger is disposed outside of said automobile passenger compartment.
Claim 11
Dependent Claim
23 words
The automobile air conditioning system according to claim 8 wherein said second heat exchanger is disposed in a trunk compartment of an automobile.
Claim 12
Dependent Claim
21 words
The automobile air conditioning system according to claim 6 wherein said first heat exchanger is disposed in said automobile passenger compartment.
Claim 13
Dependent Claim
89 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising a condensor; a second heat exchanger comprising an evaporator; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger; first damper means for selectively opening and closing said first duct means; and second damper means for selectively opening and closing said second duct means.
Claim 14
Dependent Claim
89 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising a condensor; a second heat exchanger comprising an evaporator; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger; first damper means for selectively opening and closing said first duct means; and second damper means for selectively opening and closing said second duct means.
Claim 15
Dependent Claim
27 words
The automobile air conditioning system of claim 11 further comprising third duct means for conducting air from outside said vehicle passenger compartment to said second heat exchanger.
Claim 16
Dependent Claim
44 words
The automobile air conditioning system of claim 12 wherein said second damper means position is, relative to said second and said third duct means, continuously variable between a position which closes said second duct means and a position which closes said third duct means.
Claim 17
Dependent Claim
65 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising an evaporator; a second heat exchanger comprising a condensor; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; and second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger.
Claim 18
Dependent Claim
65 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising an evaporator; a second heat exchanger comprising a condensor; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; and second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger.
Claim 19
Dependent Claim
27 words
The automobile air conditioning system of claim 14 further comprising third duct means for conducting air from outside said vehicle passenger compartment to said second heat exchanger.
Claim 20
Dependent Claim
25 words
The automobile air conditioning system of claim 15 further comprising means for selectively opening and closing said first, said second and said third duct means.
Claim 21
Dependent Claim
65 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising a condensor; a second heat exchanger comprising an evaporator; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; and second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger.
Claim 22
Dependent Claim
65 words
An air conditioning system for controlling the temperature of a vehicle passenger compartment, said air conditioning system comprising: a first heat exchanger comprising a condensor; a second heat exchanger comprising an evaporator; first duct means for conducting air from said first heat exchanger to said vehicle passenger compartment; and second duct means for conducting air from said vehicle passenger compartment to said second heat exchanger.
Claim 23
Dependent Claim
27 words
The automobile air conditioning system of claim 17 further comprising third duct means for conducting air from outside said vehicle passenger compartment to said second heat exchanger.
Claim 24
Dependent Claim
25 words
The automobile air conditioning system of claim 18 further comprising means for selectively opening and closing said first, said second and said third duct means.
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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) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |