2. The heat pump drying room from the advantages of the above work process analysis shows that the use of heat pump drying room for drying drying room can overcome the existing deficiencies, energy-saving, environment-friendly and wide adaptability and purpose. a) the heat pump is the energy transfer means, compared to the conventional drying room to conserve energy. According to a conservative estimate, with a heat pump system energy efficiency of only 3.5 meter to provide latent heat of vaporization 2359kJ only takes 674kJ of energy. Assuming the same factors, such as fans, heat leakage, rotary motion components, such as power consumption caused by the original dryer, the maximum power consumption of 674kJ, achieving 70% energy saving. As appropriate to optimize these factors, the energy saving effect is more obvious. b) Since the absolute moisture content of the air flowing through the condenser of d is small, the heat pump system at a relatively low condensation temperature can reduce the relative humidity of the air, improve the absorbent capacity of the air, which is conducive to the expansion of the heat pump drying room applicable range of articles. c) no need to set up the exhaust pipe, nor will the hot humid air is discharged to the room, does not affect the interior decoration and indoor air environment. d) heat evenly, good quality dried e) heat pump host excluded cold summer cooling can solve the problem, save energy