Refrigeration – Processes – Defrosting or frost inhibiting
Patent
1996-08-26
1998-10-06
Tanner, Harry B.
Refrigeration
Processes
Defrosting or frost inhibiting
62154, 62155, 62156, F25B 4702
Patent
active
058160540
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a defrosting apparatus for controlling the defrosting operation of evaporators respectively associated with freezing and refrigerating compartments of a refrigerator and a method for controlling such a defrosting apparatus.
BACKGROUND OF THE INVENTION
An example of such a defrosting apparatus for refrigerators is disclosed in Japanese Utility Model Laid-open publication No. Sho. 56-149859 published on Nov. 10, 1981. The defrosting apparatus disclosed in this publication includes a tank connected in parallel to an. inlet pipe connected between evaporators of the refrigerator, an electromagnetic valve disposed in one conduit extending from the tank, and a timer adapted to cut off the supply of power to a compressor of the refrigerator while applying power to a defrosting heater to open the electromagnetic valve when the operation time of the compressor is accumulated for a certain period of time.
Another defrosting apparatus is disclosed in Japanese Utility Model Laid-open publication No. Sho. 56-1082 published on Jan. 7, 1981. This defrosting apparatus includes electric heaters respectively arranged in the vicinity of a refrigerant inlet port and an evaporator. Above and beneath the evaporator, temperature switches are disposed to control the electric heaters, respectively. The temperature switches have the same temperature set value.
FIG. 1 illustrates a typical refrigerator having a conventional construction whereas FIG. 2 illustrates a refrigerating cycle employed in the refrigerator. As shown in FIG. 1, the refrigerator includes a refrigerator body 1 provided with food storing compartments, namely, a freezing compartment 2 and a refrigerating compartment 3. At the front portion of the refrigerator body 1, doors 2a and 3a are mounted which serve to open and close the freezing and refrigerating compartments 2 and 3, respectively.
Between the freezing and refrigerating compartments 2 and 3, an evaporator 4 is mounted which carries out a heat exchange between air being blown into the freezing and refrigerating compartments 2 and 3 and refrigerant passing through the evaporator 4, thereby evaporating the refrigerant by latent heat from the air while cooling the air. At the rear side of the evaporator 4, a fan 5a is mounted which is rotated by a fan motor 5 to circulate the cold air heat-exchanged by the evaporator 4 through the freezing and refrigerating compartments 2 and 3.
In order to control the amount of cold air supplied to the refrigerating compartment 3, a damper 6 is provided which allows the supply of cold air to the refrigerating chamber 3 or cuts off the supply of cold air in accordance with the internal temperature of the refrigerating compartment 3. A plurality of shelves 7 are separably disposed in both the freezing and refrigerating compartments 2 and 3 to partition the compartments into several food storing sections.
At respective rear portions of the freezing and refrigerating compartments 2 and 3, duct members 8 and 9 are mounted which guide flows of the cold air heat-exchanged by the evaporator 4 such that they enter and circulate through the freezing and refrigerating compartments 2 and 3. The freezing and refrigerating compartments 2 and 3 have cold air discharge ports 8a and 9a, respectively. Through the cold air discharge ports 8a and 9a, flows of cold air respectively guided by the duct members 8 and 9 after being heat-exchanged by the evaporator 4 are introduced in the freezing and refrigerating compartments 2 and 3.
A compressor 10 is mounted at the lower portion of the refrigerator body 1 to compress the gaseous refrigerant of low temperature and pressure, emerging from the evaporator 4, to that of high temperature and pressure. A defrosted water dish 11 is also disposed at the front side (the left side when viewed in FIG. 1) of the compressor 10. The defrosted water dish 11 collects water (dewdrop) produced from the air being blown by the fan 5a upon cooling the air by the heat exchange at the evaporator 4 and water (def
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patent: 4327557 (1982-05-01), Clarke et al.
patent: 4411139 (1983-10-01), Bos
patent: 4569205 (1986-02-01), Dempou et al.
patent: 4750332 (1988-06-01), Jenski et al.
Kim Jong-Ki
Lee Gi-Hyeong
Lee Jae-Seung
Park Hae-Jin
Seo Kuk-Jeong
Samsung Electronics Co,. Ltd.
Tanner Harry B.
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