Refrigeration – Processes – Defrosting or frost inhibiting
Patent
1997-01-17
1999-08-03
Wayner, William
Refrigeration
Processes
Defrosting or frost inhibiting
62179, 62180, F25D 2112, F25D 1700
Patent
active
059310049
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF INVENTION
The invention is related to providing a refrigerator, and in particular, to providing a refrigerator having high efficiency multi-evaporator cycle(H.M. CYCLE) and control method thereof for performing the refrigerating and freezing of the constant temperature in each of divided compartment thereof by using separate evaporators and their related fans.
In general, a refrigerator comprises a body 4 into which a freezing compartment 2 and a refrigerating compartment 3 are divided from each other by a middle partition 1 with doors 5 and 6 being provided as shown in FIG. 1. The refrigerator has a refrigerating cycle including a compressor 7, a condenser 8, a capillary tube 9 and an evaporator 10 connected in turn by means of refrigerant tubes 11 to one another forming a closed loop as shown in FIG. 2. In other words, The refrigerant performs the refrigerating cycle operation for the purpose of the energy state conversion during passing through the refrigerant tubes 11 and various components. Especially, the evaporator 10 absorbs the heat from around its circumference and generates cooled air.
Referring to FIG. 1, the compressor 7 is mounted on the lower portion of the body 4, and the evaporator 10 is mounted in the rear wall of the refrigerating compartment 2. A cooling fan 12 is provided over the upper portion of the evaporator 10. A fan guide 14 and a cooled air duct 15 each having cooled air discharging portions 13 are provided at proper places in the rear wall of the refrigerator body 4, so that a part of cooled air heat-exchanged at the evaporator 10 is supplied through the discharging portion 13 of the fan guide 14 into the freezing compartment 2, and the remainder is introduced through the discharging portion 13 of the cooled air duct 15 into the refrigerating compartment 3. And then after the cooled air is circulated in each compartment, it again returns to the evaporator 10 to be heat-exchanged through first and second feed-back passages 17 and 18 which are formed on a middle partition 1. An adjusting damper 18 is for adjusting an amount of cooled air to be supplied to the refrigerating compartment 3.
Referring to FIG. 3, the refrigerator is ordinarily controlled according to the method of the prior art as follows: the temperature T.sub.F of the freezing compartment 3(called "freezing temperature" below) is detected in order to determine whether the compressor 7 is operated or not. The freezing temperature T.sub.F is compared with the freezing set temperature T.sub.FS previously set by using a temperature adjuster. Therefore, control performs at step 110 to determine whether the freezing temperature T.sub.F is larger than the freezing set temperature T.sub.FS of the freezing compartment(called "the freezing set temperature" below). If the temperature T.sub.F is over the freezing set temperature T.sub.FS, step 110 goes onto step 111 to turn on the compressor 7 and the cooled fan 10. If the freezing temperature T.sub.F is below the freezing set one T.sub.FS, step 110 goes onto step 112 to turn off the compressor 7 and the cooling fan 10. After the respective operation of steps 111 and 112, control executes step 113 to determine whether the temperature T.sub.R of the refrigerating compartment 3(called "refrigerating temperature" below) is larger than the set temperature T.sub.RS of the refrigerating compartment(called "the refrigerating set temperature below) previously set by using a temperature adjuster according to their comparison results. If the refrigerating temperature T.sub.R is over the refrigerating set one T.sub.RS, step 113 goes onto step 114 to open the adjusting damper 18. On the contrary, if the refrigerating temperature T.sub.R is below the refrigerating set one T.sub.RS, step 110 goes onto step 115 to close up the adjusting damper 18.
Therefore, during the operation of the compressor 7 and the cooling fan 10, the adjusting damper 18 is operated to supply a proper amount of cooled air into the refrigerating compartment 3, but when the compressor 7 is turned off, eve
REFERENCES:
patent: 2780441 (1957-02-01), Rhodes
patent: 4416119 (1983-11-01), Wilson et al.
patent: 4495780 (1985-01-01), Kaneko et al.
patent: 5428965 (1995-07-01), Grunwald et al.
Lee Hai Min
Lee Jae Seung
Lim Jae Hoon
Suh Kook Jung
Yoo Han Joo
Samsung Electronics Co,. Ltd.
Wayner William
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