Refrigeration – With means preventing or handling atmospheric condensate... – Moisture condensing means distinct from principal heat absorber
Reexamination Certificate
2002-09-17
2003-12-23
Jiang, Chen Wen (Department: 3744)
Refrigeration
With means preventing or handling atmospheric condensate...
Moisture condensing means distinct from principal heat absorber
C062S277000, C062S081000
Reexamination Certificate
active
06666043
ABSTRACT:
This application claims the benefit of the Korean Application Nos. P 2002-0027699, P 2002-25099, P 2002-25100 filed on May 20, 2002, May 7, 2002, May 7, 2002, which is hereby incorporated by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a refrigerator, and more particularly, to a dewfall preventing device of a refrigerator for preventing the dewfall phenomenon occurring on the contact portion of the front side and a door of the refrigerator by the hot heat of a compressor of the refrigerator.
2. Discussion of the Related Art
Generally, a refrigerator is used to freeze or cool foods, and its schematic structure is illustrated as follows.
FIG. 1
illustrates a side sectional view of a conventional refrigerator.
Referring to
FIG. 1
, a refrigerator includes a case forming a receiving space divided into a freezing room
101
and a cooling room
102
, a door
12
, which is installed on the front side of the case
10
to open/close the freezing room
101
and the cooling room
102
, and units such as a compressor
20
, a condenser
30
, and an evaporator
40
, etc. to form a freezing cycle.
In the refrigerator, a gas refrigerant of low pressure and temperature is compressed into high pressure and temperature by the compressor
20
, and the compressed gas refrigerant of high pressure and temperature is transferred into a liquid phase of high pressure by being cooling-compressed while passing the condenser
30
. While the liquid phase of the refrigerant of high pressure passes through a capillary tube or an expander (not shown), its temperature and pressure are decreased. While the liquid refrigerant is transferred into a gas of low pressure and temperature in the evaporator
40
, it extracts the heat from the cooling room and the freezing room to cool the air there inside.
The evaporator
40
is installed inside a vaporizing room
103
that is a separate space of the back of the freezing room
101
. The air cooled by the evaporator
40
is introduced into the freezing room
101
and the cooling room
102
and circulated therethrough by the operation of the fan
50
installed in the vaporizing room
103
to drop the temperature of the freezing room
101
and the cooling room
102
.
Generally, dew forms on the front end side of the case
10
which contacts the door
12
due to the temperature difference with the outside when opening the door
12
of the refrigerator because of the characteristics of the freezing room
101
, which is referred to as dewfall phenomenon.
To prevent the above dewfall phenomenon, a hot line (referring a numeral
70
of
FIG. 2
) is normally installed in the refrigerator.
FIG. 2
illustrates a flow line of the hot line of the conventional refrigerator.
Referring to
FIG. 2
, the hot line (dotted line)
70
comes out from an input end of the condenser
30
installed in a machinery room, circulates the case
10
, and goes into the output end of the condenser
30
. That is, the hot line
70
is a secondary condensing tube installed on the interior front side of the case
10
, which circulates the contact portion of the door
12
and the case
10
.
Therefore, according to the conventional technology, a part of the refrigerant gas of high pressure and temperature discharged from the compressor
20
is introduced into the hot line
70
. Then, the front side portion around the hot line
70
in the case
10
is heated over a room temperature thereby to prevent the dewfall phenomenon on the front side of the case
10
even with the opening of the door
12
.
However, a cooling load is increased in the conventional refrigerator, that is, the refrigerant gas of high pressure and temperature discharged from the compressor
20
is used as the working fluid of the hot line
70
, and the overall front side of the case
10
is heated over a high temperature unnecessarily, and the heat generated from the hot line
70
is transferred into the freezing room
101
and the cooling room
102
.
In addition, a frictional heat of a high temperature is generated from the compressor
20
, and the frictional heat has a bad effect on the compressor
20
, itself thereby to reduce the operation performance of the compressor
20
.
In addition, the heat generated from the compressor
20
is not used appropriately, and wasted to the outside resulting in causing a loss of energy and reducing the efficiency of the refrigerator.
In addition, besides the circulation cycle of the refrigerant basically incorporating only the compressor
20
, the condenser
30
, the evaporator
40
, and the expansion valve in the conventional technology, the additional refrigerant is necessary by the amount passing through the hot line
70
so that the production expenses is increased and the productivity of the refrigerator is decreased.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to a dewfall preventing device of a refrigerator that substantially obviates one or more problems due to limitations and disadvantages of the related art.
An object of the present invention is to provide a dewfall preventing device of a refrigerator by using a thermosyphon employing the hot heat generated from a compressor of the refrigerator as a heating source, and forming a hot line on the contact portion of a refrigerator case and a refrigerator door.
Another object of the present invention is to provide a dewfall preventing device of a refrigerator for efficiently discharging the hot heat generated from the compressor.
A further object of the present invention is to provide a dewfall preventing device of a refrigerator, wherein the thermosyphon is operated by a working fluid independently from a typical refrigerating cycle of the refrigerator, and the separate working fluid heat-exchanges with the heat of the cooling oil of the compressor.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, a dewfall preventing device of a refrigerator may include a compressor for compressing a refrigerant; a heat exchanger for extracting the heat generated from the increase of the refrigerant inner energy by the friction and the compression in the compressor; a thermosyphon for maintaining the contact portion of a refrigerator case and a refrigerator door at a predetermined temperature by a way that a working fluid phase-transferred into a gas phase in the heat exchanger radiates the extracted heat, and after releasing the extracted heat, the cooled working fluid comes back into the heat exchanger by gravitation; and a wick being placed in the pipe line of the heat exchanger for concentrating the extracted heat generated from the compressor and enabling the working fluid to easily flow.
The present invention forms a hot line by using thermosyphon in which a separate working fluid is injected without using a refrigerant gas, and reduces an air pollution due to the refrigerant gas. In addition, the production process to realize the present invention is simple without an auxiliary circulating device.
Additionally, the compressor is easily cooled, and the waste heat is reused thereby to increase energy efficiency.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 3984223 (1976-10-01), Whistler, Jr.
patent: 4009586 (1977-03-01), Skvarenina
patent: 5255531 (1993-10-01), Williams et al.
patent: 5826442 (1998-1
Greenblum & Bernstein P.L.C.
Jiang Chen Wen
LG Electronics Inc.
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