Directly-heating type constant-temperature drying machine

The utility model provides a directly-heating type constant-temperature drying machine. The directly-heating type constant-temperature drying machine comprises an air inlet, an electrical regulating valve, two condensers, a centrifugal fan, an air outlet and an evaporator, and further comprises circulating conveyance pipes, a fan and moisture discharge openings, wherein the electrical regulating valve is arranged at the tail end of the air inlet; the condensers are arranged at the right lower corner of the electrical regulating valve; the centrifugal fan is arranged on the right sides of the condensers; the air outlet is formed in the lower part of the centrifugal fan; the evaporator is arranged below the condensers; the circulating conveyance pipes are respectively connected with the two ends of the condenser and the two ends of the evaporator; the fan is arranged on the left side of the condensers; the moisture discharge openings are formed in the left side of the fan. According to the directly-heating type constant-temperature drying machine, the two condensers are arranged obliquely, so that the heating area of fresh air is increased; the air charging amount of the fresh air is regulated by combining the two condensers with the electrical regulating valve, and the speed of the condenser heating the air is controlled, so that the heating speed is high, the heating effect is good, the work efficiency ratio of a main frame is increased, and the energy saving effect is achieved; compared with the traditional technique, the directly-heating type constant-temperature drying machine has the advantages that the air does not need to be circularly heated; furthermore, the air outlet can be externally connected with a heat transmission pipe, so that a certain distance is formed, the fire disaster can be prevented, and the operation safety is improved.