Based on mass, energy and momentum conservat io n law, the dynamic mathematical model of the residential water-source heat pump system has been established.

Discuss on using Yangtse River water as heat and cold sources of water source heat pumps;

Optimization of solar energy heating system combined with water source heat pumps in Tibet;

Experimental study of performance with variable operating condition for water source heat pump units;

Combined heating system of radiators and water-source heat pumps;

Mathematical model of water-source heat pump units under variant working conditions;

Application analysis of water-source heat pumpsusing iron and steel industrial cooling water;

The heat in the wastewater was used as heat source of water heat pump to make hot water.

This paper gives a brief account of heat pump technology and the basic principle,recent development and classification of geothermic air-conditioner,analyses the existing problems and gives an explanation of the general plotting,structure and main feature in developing water heat pump geothermic air-conditioner for household use.