Heat exchange – With timer – programmer – time delay – or condition responsive... – Having heating and cooling capability
Reexamination Certificate
1997-10-31
2002-07-23
Ford, John K. (Department: 3743)
Heat exchange
With timer, programmer, time delay, or condition responsive...
Having heating and cooling capability
C165S203000, C165S240000, C165S241000, C165S043000, C237S00200B, C237S01230B, C062S173000, C062S160000, C062S324100, C062S324600, C062S196400, C251S117000
Reexamination Certificate
active
06422308
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a heat pump type air conditioner for a vehicle, and more particularly to a vehicular air conditioner which executes a heating by operating a refrigeration cycle thereof.
Generally, an air conditioner employed in a vehicle is arranged to execute a heating operation by using a heater core circulating engine coolant and to execute a cooling operation by using a refrigeration system.
However, when an engine of the vehicle is started under a condition that an outside air temperature is considerably low, it is necessary to take a predetermined time period until the engine coolant is warmed at a temperature such as about 50° C. so as to be applied in the heating operation. Furthermore, if the engine is operated under idling condition or low-load condition, the temperature of the engine coolant tends to be kept at a temperature insufficient for a heater core to be applied to the heating operation.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a heat pump type air conditioner which quickly and sufficiently executes the heating operation by employing the refrigeration system of the air conditioner.
A first aspect of the present invention resides in a heat pump type air conditioner for a vehicle which executes a heating operation and a cooling operation according to a temperature condition. The heat pump type air conditioner comprises a compressor applying workload to refrigerant. An external heat exchanger is connected to an outlet of the compressor. A first flow control valve is connected to a refrigerant outlet of the external heat exchanger. An auxiliary internal heat exchanger is connected to an outlet of the first flow control valve. A second flow control valve is connected to a refrigerant outlet of the auxiliary internal heat exchanger. A main internal heat exchanger is connected to an outlet to the second flow control valve. A refrigerant outlet of the main internal heat exchanger is connected to an inlet of the compressor. An air delivering section flows air through the main and auxiliary internal heat exchangers and delivers the air to a passenger compartment of the vehicle.
A second aspect of the present invention resides in a heat pump type air conditioner which executes a heating operation and a cooling operation according to a temperature condition. The heat pump type air conditioner comprises a compressor applying workload to refrigerant. An external heat exchanger is connected to an outlet of the compressor. An auxiliary internal heat exchanger has a first port and a second portion and is arranged such that a cross sectional area of a refrigerant passage of the auxiliary internal heat exchanger is gradually increased from the first port to the second port. An expansion valve is connected to the first port of the auxiliary internal heat exchange. A refrigerant passage switching section selectively establishes a first refrigerant passage state for flowing the refrigerant from the expansion valve and the first port to the second port and a second refrigerant passage state for flowing the refrigerant from the second port to the first port and the expansion valve. A main internal heat exchanger is connected to one of the first and second ports from which the refrigerant is delivered. The refrigerant outlet of the main internal heat exchanger is connected to an inlet of the compressor.
REFERENCES:
patent: 595190 (1897-12-01), Miller
patent: 1115244 (1914-10-01), Reynolds
patent: 1711660 (1929-05-01), Stephenson
patent: 1885851 (1932-11-01), McKee
patent: 2233965 (1941-03-01), Stroviak
patent: 2525709 (1950-10-01), Morrison
patent: 3779031 (1973-12-01), Akiyama et al.
patent: 4632358 (1986-12-01), Orth et al.
patent: 4688390 (1987-08-01), Sawyer
patent: 5152465 (1992-10-01), Calabro
patent: 5291941 (1994-03-01), Enomoto et al.
patent: 5419149 (1995-05-01), Hara et al.
patent: 5473906 (1995-12-01), Hara et al.
patent: 5537831 (1996-07-01), Isaji et al.
patent: 5598887 (1997-02-01), Ikeda et al.
patent: 5634348 (1997-06-01), Ikeda et al.
patent: 5706664 (1998-01-01), Hara
patent: 5819551 (1998-10-01), Fukumoto et al.
patent: 5988155 (1999-11-01), Garceau et al.
patent: 6105666 (2000-08-01), Tajima et al.
patent: 645812 (1937-06-01), None
patent: 0 681 933 (1995-11-01), None
patent: 0 738 620 (1996-10-01), None
patent: 0137841 (1979-10-01), None
patent: 5-96931 (1993-04-01), None
patent: 6-34234 (1994-02-01), None
patent: 6-159857 (1994-06-01), None
Patent Abstracts of Japan, Pub No. 59143716 published Aug. 17, 1984, inventor Kenichi Fujiwara (1984).
Meguriya Yuichi
Ohashi Toshio
Okawara Yasuhito
Tajima Tadayoshi
Calsonic Kansei Corporation
Foley & Lardner
Ford John K.
LandOfFree
Heat pump type air conditioner for vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat pump type air conditioner for vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat pump type air conditioner for vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2861191