Patent ID: 7497089

Claim:
An adsorption heat pump which comprises (a) an adsorbate, (b) an adsorption/desorption part having an adsorbent for adsorbate adsorption/desorption, (c) a vaporization part for adsorbate vaporization which has been connected to the adsorption/desorption, part, and (d) a condensation part for adsorbate condensation which has been connected to the adsorption/desorption part, wherein (1) the adsorbent comprises a zeolite containing aluminum and phosphorus in the framework structure, and (2) the adsorbent is a water vapor adsorbent having a region in which the adsorption amount difference as determined with the following equation is 0.15 g/g or larger in the range in which the relative vapor pressure φ 2 b during adsorption operation in the adsorption/desorption part is from 0.115 to 0.18 and the relative vapor pressure φ 1 b during desorption operation in the adsorption/desorption part is from 0.1 to 0.14: Adsorption amount difference= Q 2 − Q 1 wherein Q 1 =adsorption amount at φ 1 b as determined from a water vapor desorption isotherm obtained at a temperature (T 3 ) used for desorption operation in the adsorption/desorption part Q 2 =adsorption amount at φ 2 b as determined from a water vapor adsorption isotherm obtained at a temperature (T 4 ) used for adsorption operation in the adsorption/desorption part, provided that φ 1 b (relative vapor pressure during desorption operation in the adsorption/desorption part)=[equilibrium water vapor pressure at the temperature of coolant (T 2 ) cooling the condenser]/[equilibrium water vapor pressure at the temperature of heat medium (T 1 ) heating the adsorption/desorption part] φ 2 b (relative vapor pressure during adsorption operation in the adsorption/desorption part)=[equilibrium vapor pressure at the temperature of cold (T 0 ) generated in the vaporization part]/[equilibrium vapor pressure at the temperature of coolant (T 2 ) cooling the adsorption/desorption part] (wherein T 0 =5 to 10° C., T 1 =T 3 =90° C., and T 2 =T 4 =40 to 45° C.).