Heat exchange – With vehicle feature
Reexamination Certificate
1998-02-25
2001-02-06
Ford, John K. (Department: 3743)
Heat exchange
With vehicle feature
C165S042000, C165S043000, C165S134100, C062S244000, C062S303000, C062S317000, C454S147000, C454S148000, C454S156000
Reexamination Certificate
active
06182741
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to and claims priority from Japanese Patent Application No. Hei. 9-42635 filed on Feb. 26, 1997, the contents of which are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an air conditioner for preventing an evaporator from being corroded.
2. Description of Related Art
As shown in
FIG. 5
, a conventional automotive air conditioner includes an evaporator
2
made of aluminum and a case
7
made of resin. The evaporator
2
is accommodated within the case
7
so that a core portion
21
of the evaporator
2
is placed in a substantially vertical direction in FIG.
5
. Air passes through substantially horizontally between fins of the core portion
21
of the evaporator
2
.
Within air passing through the evaporator
2
, some alien substances such as dirt and dust are contained. After using the air conditioner for a long time, the alien substances are deposited around the lower portion of the evaporator
2
and forms the deposition A of the alien substances as shown in FIG.
5
. As a result, the deposited alien substances may adhere to aluminum tubes of the evaporator
2
and the tubes may be corroded by the deposited alien substances. This may cause serious problems such as refrigerant leakage from the evaporator
2
.
SUMMARY OF THE INVENTION
In view of the above-mentioned problem, it is an object of the present invention to provide an air conditioner having an evaporator to which alien substances do not directly adhere to prevent the evaporator from being corroded.
According to the present invention, an air conditioner includes a case for accommodating an evaporator and a wall member for covering a tank of the evaporator at an immediately upstream air side of the tank. The tank is disposed at a lower side of the evaporator. Therefore, it prevents alien substances such as dirt and dust contained in air from directly adhering to the tank of the evaporator. Further, by providing the wall member, it can prevent air from flowing through a clearance between a bottom of the tank and the case. Thus, a cooling ability of the air conditioner can be improved.
Preferably, the case includes a recess portion at an immediately upstream air side of the wall member, the recess portion is opened upwardly to have a bottom portion, and the wall member is disposed to extend from the bottom portion of the recess portion to only cover the tank. Therefore, the alien substances are deposited in the recess portion to prevent the alien substances from being mixed into air again. Further, because the wall member only covers the tank, the cooling capacity is not decreased by providing the wall member.
REFERENCES:
patent: 2235642 (1941-03-01), Lintern et al.
patent: 3170509 (1965-02-01), De Rees et al.
patent: 5819841 (1998-10-01), Moynat
patent: 2532739 (1984-03-01), None
patent: 0167317 (1984-09-01), None
patent: 0055596 (1986-03-01), None
patent: 62-197412 (1987-12-01), None
patent: 0116924 (1988-05-01), None
patent: 2-225122 (1990-09-01), None
Kamiya Sadayuki
Yoshii Keiichi
Denso Corporation
Ford John K.
Harness Dickey & Pierce PLC
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