Danfoss A/s

Carsten Mølhede Thomsen

Roozbeh Izadi-Zamanabadi

Klaus Halldorsson

Bjarke Skovgård Dam

A method for terminating defrosting of an evaporator () is disclosed. The evaporator () is part of a vapour compression system (). The vapour compression system () further comprises a compressor unit (), a heat rejecting heat exchanger (), and an expansion device (). The compressor unit (), the heat rejecting heat exchanger (), the expansion device () and the evaporator () are arranged in a refrigerant path, and an air flow is flowing across the evaporator (). When ice is accumulated on the evaporator (), the vapour compression system () operates in a defrosting mode. At least two temperature sensors () monitor an evaporator inlet temperature, T, at a hot gas inlet () of the evaporator () and an evaporator outlet temperature, T, at a hot gas outlet () of the evaporator (). A difference between Tand T, is monitored and defrosting is terminated when the rate of change of the difference between Tand Tapproaches zero.

Method for terminating defrosting of an evaporator

A method for terminating defrosting of an evaporator () is disclosed. The evaporator () is part of a vapour compression system (). The vapour compression system () further comprises a compressor unit (), a heat rejecting heat exchanger (), and an expansion device (). The compressor unit (), the heat rejecting heat exchanger (), the expansion device () and the evaporator () are arranged in a refrigerant path, and an air flow is flowing across the evaporator (). When ice is accumulated on the evaporator (), the vapour compression system () operates in a defrosting mode. At least one temperature sensor () monitors a temperature T, of air leaving the evaporator (). A rate of change of Tis monitored and defrosting is terminated when the rate of change of the temperature, T, approaches zero.

Method for terminating defrosting of an evaporator by use of air temperature measurements

A pulsation damper () comprising a first tube () and a second tube (), e.g. arranged concentrically with respect to each other, the first tube () being arranged inside the second tube (). The second tube () has a closed end, and the first tube () has a second end () arranged at a distance from the closed end () of the second tube (). The first tube () is fluidly connected to the second tube () via the second end (). The pulsation damper is capable of damping pressure pulses within a broad frequency range. Furthermore a vapour compression system () having a pulsation damper () arranged in an economizer line ().

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Vejle, Denmark

Carsten Mølhede Thomsen