Firework powder heat pump constant-temperature dryer

The invention relates to a firework powder heat pump constant-temperature dryer. The firework powder heat pump constant-temperature dryer comprises a machine box, a fan at the left end of the lower portion of the machine box, a moisture exhaust opening in the left side of the fan, an evaporator on the right side of the fan, a condenser at the right upper corner of the evaporator, a refrigerant conveying pipe connected with the evaporator and the condenser, a throttling device, a liquid storage tank, a compressor, a centrifugal fan on the right side of the condenser, a hot air outlet in the lower portion of the centrifugal fan, an air inlet in the upper right corner of the centrifugal fan, an air inlet pipeline connected with the air inlet and an electric adjusting valve at the tail end of the air inlet pipeline, and the throttling device, the liquid storage tank and the compressor are arranged on the refrigerant conveying pipe. Compared with a traditional firework powder roaster, the firework powder heat pump constant-temperature dryer has the advantages that air does not need to be heated cyclically, and the danger that an explosion happens due to the fact that static friction is caused by powder due to a circulating fan is avoided; the air outlet is externally connected with a heat conveying pipe, a certain distance exists between a heat pump and a powder room, a fire disaster is avoided, and operating safety is increased.