Improved totally-closed perchloroethylene dry-cleaning machine

The utility model discloses an improved totally-closed perchloroethylene dry-cleaning machine. According to the improved totally-closed perchloroethylene dry-cleaning machine, an external circulating induced draft fan and a gas diversion pipeline in the prior art are omitted, and gas is no longer blown into a distillation tank; a back delivery pipeline is connected to a connecting pipeline between the distillation tank and a distillation tank cooler, and the back delivery pipeline is connected into the machine and arranged on the lower portion of a draught fan. By means of the structure, the improved totally-closed perchloroethylene dry-cleaning machine can suck the gas in the back delivery pipeline by turning on the draught fan and an automatic valve when the distillation effect drops obviously during the later period of distillation; since the connecting pipeline connected with the back delivery pipeline is communicated with the distillation tank and the distillation tank cooler simultaneously, the gas can