Air-conditioning unit

Details Air-conditioning unit Air-conditioning unit

2001-04-06

2002-08-27

Jiang, Chen-wen (Department: 3744)

Refrigeration

With repair, assembly or disassembly means

C062S244000

Reexamination Certificate

active

06438985

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an air-conditioning unit.
Recently, various low-pollution vehicles have been developed as a response to environmental problems. Electric vehicles, one type of low-pollution vehicles, have been developed actively and put to practical use. Each electric vehicle runs a drive motor using a battery as the energy source. A motor-driven compressor, which uses an electric motor as the drive source, is used as a compressor for an air-conditioning systems in electric vehicles.
For example, Japanese Unexamined Patent Publication (KOKAI) No. Hei 8-216671 discloses an air-conditioning system that uses a motor-driven compressor as shown in FIG.
7
.
A case
52
of an air-conditioning system
51
houses a condenser
53
, an evaporator
54
and a motor-driven compressor
55
. The case
52
is divided into first, second and third chambers
60
,
70
and
80
. The first chamber
60
accommodates the condenser
53
, the second chamber
70
accommodates the evaporator
54
, and the third chamber
80
accommodates a horizontal type motor-driven compressor
55
and a four-way valve
56
. The condenser
53
, the evaporator
54
, the motor-driven compressor
55
and the four-way valve
56
are connected together by pipes
57
a
to
57
d
, which form a passage for a refrigerant gas. A motor-driven expansion valve
58
is provided on the pipe
57
c
that connects the condenser
53
to the evaporator
54
.
In consideration of environmental problems, carbon dioxide has recently been used as a refrigerant. In this case, the pressure inside each of the pipes
57
a
-
57
d
is higher than that where chlorofluorocarbon, or freon, is used as a refrigerant. This causes refrigerant gas to leak through the joint sections of the pipes
57
a
-
57
d
. When the pipes are long, the probability of cracks and other kinds of damage increases. Such damages including cracks will result in leakage of the refrigerant gas.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a compact air-conditioning unit that prevents with certainty leakage of the refrigerant that circulates through the air-conditioning unit.
To achieve the above objective, the present invention provides an air-conditioning unit. The air-conditioning unit comprises a compressor component for compressing a refrigerant, a condenser component for condensing the refrigerant, and an evaporator component for evaporating the refrigerant. At least two of the compressor, the condenser and the evaporator components are assembled integrally.
Other aspects and advantages of the invention will become apparent from the following description, taken in conjunction with the accompanying drawings, illustrating by way of example the principles of the invention.


REFERENCES:
patent: 6148630 (2000-11-01), Saccone
patent: 8-216671 (1996-08-01), None
patent: 10141693 (1998-05-01), None
patent: 10311621 (1998-11-01), None

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