Electric heating – Heating devices – Combined with diverse-type art device
Reexamination Certificate
2000-03-15
2001-07-24
Jeffery, John A. (Department: 3742)
Electric heating
Heating devices
Combined with diverse-type art device
C165S299000, C165S300000, C165S041000, C392S485000
Reexamination Certificate
active
06265692
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to and claims priority from Japanese Patent Application No. Hei. 11-76564 filed on Mar. 19, 1999, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a vehicle air conditioner which includes a heating heat exchanger and electrical heating members integrated with the heating heat exchanger.
2. Description of Related Art
JP-A-5-69732 describes a heating heat exchanger integrated with plural electrical heating members. When temperature of hot water (engine-cooling water) flowing into the heating heat exchanger is lower than a set temperature, electrical power is supplied to the electrical heating members to heat air using heat generated from the electrical heating members. However, in the conventional heating heat exchanger, an electrical connection between the electrical heating members and an outer circuit is not described. Further, because a cooling heat exchanger is disposed at an upstream air side of the heating heat exchanger, condensed water generated on the cooling heat exchanger may be adhered to the heating heat exchanger by the air flow, and an electrical connection portion of the electrical heating members may be short-circuited. Further, when the electrical connection portion of the electrical heating members protrudes to a core portion of the heating heat exchanger, an air-flow resistance is increased.
SUMMARY OF THE INVENTION
In view of the foregoing problems, it is an object of the present invention to provide a vehicle air conditioner having an electrical heating member integrated with a heating heat exchanger, which prevents trouble at an electrical connection portion of the electrical heating member, such as a short-circuit.
According to the present invention, a heating heat exchanger disposed in the air conditioning case includes a core portion having a plurality of tubes through which a fluid flows and a plurality of fin members connected to the tubes, and a tank portion disposed at a lower side of the core portion to communicate with the tubes. Further, an electrical heating member is disposed integrally with the heating heat exchanger, and an electrical connection portion of the electrical heating member is disposed on a downstream side position of the tank portion in an air flow direction. Thus, the tank portion can prevent water from being introduced to the electrical connection portion of the electrical heating member. Thus, a trouble such as an electrical short circuit of the electrical connection portion is effectively prevented. Further, because the tank position of the heating heat exchanger is disposed away from a main flow passage of air, it can prevent air flow resistance from increasing due to the arrangement of the electrical connection portion.
Preferably, the heating heat exchanger is disposed to be inclined toward a downstream air side relative to a vehicle up-down direction, and the electrical connection portion has a bottom surface higher than a bottom surface of the first tank portion in the vehicle up-down direction. Therefore, a size of an air conditioner is reduced, and the air conditioner is readily mounted on a vehicle.
REFERENCES:
patent: 6037567 (2000-03-01), Inoue et al.
patent: 6055360 (2000-04-01), Inoue et al.
patent: 6078024 (2000-06-01), Inoue et al.
patent: 6178292 (2001-01-01), Fukuoka et al.
patent: 2043235 (1980-10-01), None
patent: 2325732 (1998-12-01), None
patent: 5-69732 (1993-03-01), None
patent: 11-48759 (1999-02-01), None
Shiraishi Hiroaki
Umebayahi Makoto
Denso Corporation
Harness Dickey & Pierce PLC
Jeffery John A.
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