Defrosting system of refrigeration house

The utility model relates to the field of vortex tube heating, in particular to a defrosting system of a refrigeration house. The defrosting system of the refrigeration house comprises a vortex tube,a hot gas recovery device, a hot gas flow air port and an air conveying device, an output port of the air conveying device is communicated with an air inlet of the vortex tube, a cold gas outlet of the vortex tube is led into a refrigeration house chamber, and a hot gas outlet of the vortex tube is connected with the hot gas flow air port through a first pipeline. The hot air flow port is close tothe evaporator and is used for blowing to the evaporator in the refrigeration house chamber for defrosting, and the hot air recovery device is communicated to the first pipeline and is used for collecting hot air discharged by the outdoor unit and gathering the hot air into the first pipeline. The defrosting device has the advantages of being reasonable in structural design, easy and convenient to operate and use, capable