US5284025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air conditioning apparatus for an electrically-powered motor vehicle
Assignee: Panasonic Holdings Corp
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Filing: 1992-06-17
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Granted: 1994-02-08
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Expires: 2012-06-17
Abstract
Abstract An air conditioning system includes: a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior heat exchanger, an interior heat exchanger fan, and a four-way switching valve further comprises an outside air induction/venting device provided outside the outside air heat exchanger. A device for switching or opening/closing the air intakes and/or outlet of the outside air heat exchanger are provided in the outside air induction/venting device and are operated to enable the efficient use of waste heat from the drive shaft motor or inside the passenger compartment, and to provide a defrost cycle in the heat pump heating mode.
Inventors
- 👤 Minoru Kajitani
- 👤 Norio Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:59
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/32; B60H1/3204; B60H1/3205; B60H1/3207; B60H1/00357; B60H1/00385; B60H1/00392; B60L; B60L1/00; B60L1/003; B60L3/00; B60L3/0023; B60L3/0061; B60H1/00642; B60H1/00814; B60H1/00878; B60H2001/00961; B60L2240/00; B60L2240/10; B60L2240/34; B60L2240/36; B60L2240/40; B60L2240/42; B60L2240/425; B60L2240/60; B60L2240/66; B60L2240/662; B60L2270/00; B60L2270/46; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/72; Y02T90/00; Y02T90/10; Y02T90/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; a first air duct enclosing a drive shaft motor for ducting air that has passed said drive shaft motor; a second air duct for direct ducting of outside air; and a switching means for switching between said two air ducts provided at an air intake of said outside air heat exchanger.
Claim 2
Dependent Claim
101 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; a first air duct enclosing a drive shaft motor for ducting air that has passed said drive shaft motor; a second air duct for direct ducting of outside air; and a switching means for switching between said two air ducts provided at an air intake of said outside air heat exchanger.
Claim 3
Dependent Claim
109 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; and a switch device for opening and closing said air duct provided at said air intake of said outside air heat exchanger; wherein said switch device closes said ventilation circuit during a defrost operation in at least a warming mode, whereby air flow through said outside air heat exchanger is prevented, thereby shortening the time of the defrost operation.
Claim 4
Dependent Claim
109 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; and a switch device for opening and closing said air duct provided at said air intake of said outside air heat exchanger; wherein said switch device closes said ventilation circuit during a defrost operation in at least a warming mode, whereby air flow through said outside air heat exchanger is prevented, thereby shortening the time of the defrost operation.
Claim 5
Dependent Claim
123 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; a first air duct enclosing a drive shaft motor for ducting air which has passed said drive shaft motor; a second air duct for direct ducting of outside air; a switch device provided at an air intake of said outside air heat exchanger for opening and closing said two air ducts; and a control device for operating said switch device and said outside air heat exchanger fan according to an air conditioning mode.
Claim 6
Dependent Claim
123 words
An air conditioning apparatus for an electrically-powered motor vehicle comprising: a heat pump heating and cooling system including a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior air heat exchanger, an interior air heat exchanger fan, and a four-way selector valve; a first air duct enclosing a drive shaft motor for ducting air which has passed said drive shaft motor; a second air duct for direct ducting of outside air; a switch device provided at an air intake of said outside air heat exchanger for opening and closing said two air ducts; and a control device for operating said switch device and said outside air heat exchanger fan according to an air conditioning mode.
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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |