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(11) | EP 2 189 740 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Cooling system with a unit for determining the amount of frost and method of controlling such a system |
| (57) An oscillatory wave generating unit and an oscillatory wave sensing unit are installed
at both ends of a refrigerant pipe of an evaporator of the cooling system, an amount
of frost formed on the refrigerant pipe is determined by comparing a wave form of
an oscillatory wave generated from one end of the refrigerant through the oscillatory
wave generating unit and a wave form of the oscillatory wave sensed by the other one
end of the refrigerant through the oscillatory wave sensing unit, and whether or not
a defrosting operation is performed is determined by a result of the determination.
The cooling system increases the accuracy in sensing the amount of the frost formed
on the evaporator of a refrigerator, a Kimchi refrigerator, or an air conditioner,
and respectively starts and ends the defrosting operation at proper points of time,
thus enhancing a heat-exchanging performance and increasing energy efficiency.
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