Refrigeration – Gas controller or director – Cooled gas directed relative to cooled enclosure
Patent
1997-05-30
1998-09-01
Doerrler, William
Refrigeration
Gas controller or director
Cooled gas directed relative to cooled enclosure
62407, F25D 1704
Patent
active
057995001
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a refrigerator, more specifically to a refrigerator including a main body housing a fresh food compartment, and a cool air duct provided in a wall of the fresh food compartment and having cool air discharge openings opened toward the fresh food compartment to supply a cool air from an evaporator into the fresh food compartment.
BACKGROUND ART
As described in FIG. 1, a conventional refrigerator has a thermally insulated main body 4 housing a freezing compartment 2 and a fresh food compartment 3 separated with each other by a partitioning wall 1, as well as a freezing compartment door 6 and a fresh food compartment door 7 which open/close the freezing compartment 2 and the fresh food compartment 3 respectively. In the main body 4 of the refrigerator is installed a refrigeration system consisting of a compressor 11, a condenser(not shown), an evaporator 12a for the freezing compartment 2 and an evaporator 12b for the fresh food compartment 3. A cool air produced at each evaporator 12a, 12b is directed toward the freezing compartment 2 and fresh food compartment 3 by means of the freezing compartment fan 13 a or the fresh food compartment fan 13b.
A cool air duct 15 guides the cool air from the fresh food compartment fan 13b. The cool air duct 15 has cool air discharging openings 16 facing the interior of the fresh food compartment 3 through which the cool air is provided to the compartment 3. A control damper 19 closing/opening the entrance of the cool air duct 15 is provided at the entrance of the cool air duct 15 in order to control the amount of cool air blown into the fresh food compartment 3.
In the typical refrigerators, the cool air for the fresh food compartment 3 is generally delivered in a so-called shelf-by-shelf fashion as illustrated in FIG. 2. In a shelf-by-shelf cooling method, the fresh food compartment 3 is stratified by means of shelves 8 into several sub-compartments, and the vertically arranged cool air discharging openings 16 are associated to the sub-compartments to provide the cool air to the respective corresponding sub-compartment.
However, the refrigerator adopting the above shelf-by-shelf cooling method are burdened with a problem of an uneven refrigeration in the fresh food compartment 3, due to a temperature difference between regions of the fresh food compartment 3. Since the cool air is blown into the compartment 3 only in the direction toward which the discharging openings 16 is facing, there is bound to exist a region within the compartment 3 receiving more cool air or less than others. Furthermore such a cooling method does not allow the flexibility to concentrate the cool air into a specific region when there is a necessity to have a region cooler than others.
A so-called tri-dimensional refrigerator has been recently conceived to overcome the forementioned shortcoming of the shelf-by-shelf cooling method. As illustrated in FIG. 3, in such a shelf-by-shelf cooling method. As illustrated in FIG. 3, in such a method, a number of cool air discharging openings 16' are located not only on the back wall but also on the side walls of the fresh food compartment 3 allowing the delivery of the cool air from three sides.
Such a tri-dimensional cooling method, despite an improved uniform distribution of cool air in the fresh food compartment 3 however, does not permit the cool air to be fully dispersed in the compartment 3 as the discharge of the cool air is effectuated only in fixed directions. Foodstuffs stored in a region where the cool air is mainly directed have a risk of being over-cooled. By contrast, foodstuffs scored in the corners may not be cooled sufficiently. Accordingly, in the method, there's a definite limit in maintaining the temperature even throughout the storage area. Furthermore, as in the case of the shelf-by-shelf cooling system, this method makes impossible to concentrate the cool air into a specific area, should there exist a necessity to do so. A further significant problem of the tri-dimensional cooling meth
REFERENCES:
patent: 5664437 (1997-09-01), Park et al.
Doerrler William
Samsung Electronics Co,. Ltd.
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