Heat exchange – With thermal or acoustical blocker
Reexamination Certificate
1999-11-24
2001-08-21
Flanigan, Allen (Department: 3743)
Heat exchange
With thermal or acoustical blocker
C165S140000, C165S149000
Reexamination Certificate
active
06276445
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
This application relates to and claims priority from Japanese Patent Application Nos. 10-343323 filed on Dec. 2, 1998 and 11-209590 filed on Jul. 23, 1999, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to automotive air conditioners, and particularly to an automotive air conditioner heat exchanger having a condenser and a radiator for cooling engine cooling water.
2. Related Art
JP-A-10-170185 discloses a heat exchanger having a condenser and a radiator. An end of a header tank of the condenser in a longitudinal direction thereof and an end of a header tank of the radiator in a longitudinal direction thereof are closed by a single header cap. The header cap is also used as a bracket through which the heat exchanger is mounted to a vehicle.
However, in the heat exchanger, heat may be transmitted from the radiator to the condenser through the header cap. As a result, heat exchange performance of the condenser may deteriorate.
SUMMARY OF THE INVENTION
In view of the foregoing problems, it is an object of the present invention to provide a heat exchanger having first and second heat exchangers for improving heat exchange performance.
According to the present invention, a heat exchanger unit has a first heat exchanger and a second heat exchanger. The first heat exchanger has a plurality of first tubes and a first tank communicating with each first tube. The second heat exchanger is disposed at a downstream air side of the first heat exchanger, and has a plurality of second tubes and a second tank communicating with each second tube. A holding member is secured to an end of at least one of the first tank and the second tank in a longitudinal direction thereof for holding the first heat exchanger and the second heat exchanger. Further, a heat insulating member is disposed between the holding member and an end of at least one of the first tank and the second tank in the longitudinal direction thereof for restricting heat from being transmitted from the at least one of the first tank and the second tank to the holding member.
As a result, heat is restricted from being transmitted between the first heat exchanger and the second heat exchanger through the holding member, to maintain heat exchange performance of the heat exchanger.
Preferably, the heat insulating member includes a cavity. As a result, heat is restricted from being transmitted between the first heat exchanger and the second heat exchanger by the cavity.
Preferably, the holding member has a heat transmission restriction member for restricting heat transmission within the holding member. As a result, heat is further restricted from being transmitted between the first heat exchanger and the second heat exchanger through the holding member.
REFERENCES:
patent: 5186243 (1993-02-01), Halstead
patent: 5186246 (1993-02-01), Halstead
patent: 5535819 (1996-07-01), Matsuura
patent: 5992514 (1999-11-01), Sugimoto et al.
patent: 6095239 (2000-08-01), Makino et al.
patent: 2-92492 (1990-07-01), None
Sakane Takaaki
Sasano Norihisa
Sugimoto Tatsuo
Denso Corporation
Flanigan Allen
Harness Dickey & Pierce PLC
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