Patent ID: 7975502
Filing Date: 2011-07-12
Classification: D06F,F25B,F26B

Abstract:
1. A heat pump apparatus comprising: a compressor for compressing a refrigerant; a circulation duct having an air inlet and an air outlet at respective ends thereof for circulating drying air therethrough in a direction from the air inlet to the air outlet; a radiator, disposed inside said circulation duct and immediately adjacent to the air outlet, for condensing the refrigerant to heat the drying air; an evaporator, disposed inside said circulation duct and immediately adjacent to the air inlet, for evaporating the refrigerant to absorb heat from the drying air; a first throttle apparatus and a second throttle apparatus for controlling the refrigerant pressure; a heat exchanger, disposed inside said circulation duct and connected between said first throttle apparatus and said second throttle apparatus, functioning as another radiator for condensing the refrigerant to heat the drying air or as another evaporator for evaporating the refrigerant to absorb heat from the drying air, depending on the refrigerant pressure controlled by said first throttle apparatus and said second throttle apparatus; a drying room, connected to said circulation duct thus constituting a circulatory path for the drying air, for offering a space to place a subject to be dried; and a refrigerant pipe connecting, in the following order, said compressor; said radiator; said first throttle apparatus; said heat exchanger; said second throttle apparatus; and said evaporator, in a series circuit of the refrigerant.