Laundry treatment apparatus, in particular dryer, washing machine or washing machine having drying function, comprising: a laundry storing chamber for treating laundry using processing air, a blower for blowing cooling air, a processing air loop for circulating the processing air through the laundry storing chamber, and a heat pump system for dehumidifying and heating the processing air, the heat pump system having a refrigerant loop, comprising: a first heat exchanger for heating a refrigerant and cooling the processing air, a second heat exchanger for cooling the refrigerant and heating the processing air, a refrigerant expansion device arranged in the refrigerant loop between the second heat exchanger and the first heat exchanger, a compressor arranged in the refrigerant loop between the first heat exchanger and the second heat exchanger, an auxiliary heat exchanger connected in the refrigerant loop for cooling the refrigerant, wherein the blower is adapted to remove heat from the auxiliary heat exchanger; and a shielding device (36, 36a-d) arranged to shield the compressor against cooling air blown by the blower, characterized in that the auxiliary heat exchanger is arranged in the refrigerant loop: a) between the second heat exchanger and the refrigerant expansion device, or b) connected in said refrigerant loop with respect to the refrigerant flow serially upstream the second heat exchanger between the compressor and the second heat exchanger. a laundry storing chamber for treating laundry using processing air, a blower for blowing cooling air, a processing air loop for circulating the processing air through the laundry storing chamber, and a heat pump system for dehumidifying and heating the processing air, the heat pump system having a refrigerant loop, comprising: a first heat exchanger for heating a refrigerant and cooling the processing air, a second heat exchanger for cooling the refrigerant and heating the processing air, a refrigerant expansion device arranged in the refrigerant loop between the second heat exchanger and the first heat exchanger, a compressor arranged in the refrigerant loop between the first heat exchanger and the second heat exchanger, an auxiliary heat exchanger connected in the refrigerant loop for cooling the refrigerant, wherein the blower is adapted to remove heat from the auxiliary heat exchanger; and a shielding device (36, 36a-d) arranged to shield the compressor against cooling air blown by the blower, characterized in that the auxiliary heat exchanger is arranged in the refrigerant loop: a) between the second heat exchanger and the refrigerant expansion device, or b) connected in said refrigerant loop with respect to the refrigerant flow serially upstream the second heat exchanger between the compressor and the second heat exchanger. a first heat exchanger for heating a refrigerant and cooling the processing air, a second heat exchanger for cooling the refrigerant and heating the processing air, a refrigerant expansion device arranged in the refrigerant loop between the second heat exchanger and the first heat exchanger, a compressor arranged in the refrigerant loop between the first heat exchanger and the second heat exchanger, an auxiliary heat exchanger connected in the refrigerant loop for cooling the refrigerant, wherein the blower is adapted to remove heat from the auxiliary heat exchanger; and a shielding device (36, 36a-d) arranged to shield the compressor against cooling air blown by the blower, characterized in that the auxiliary heat exchanger is arranged in the refrigerant loop: a) between the second heat exchanger and the refrigerant expansion device, or b) connected in said refrigerant loop with respect to the refrigerant flow serially upstream the second heat exchanger between the compressor and the second heat exchanger. a) between the second heat exchanger and the refrigerant expansion device, or b) connected in said refrigerant loop with respect to the refrigerant flow serially upstream the second heat exchanger between the compressor and the second heat exchanger.