Multi-pipe spraying device

The invention relates to a multi-pipe spraying device which comprises a body forming a closed accommodating space, a spraying pipe positioned at the upper part and a heat transfer pipe positioned at the lower part are arranged in the accommodating space, and the multi-pipe spraying device also comprises a gas outlet pipe which is used for discharging a gaseous cold medium in the accommodating space and a communicating pipe for introducing the gaseous cold medium of a cold medium source into the accommodating space; and the multi-pipe spraying device further comprises a gas-liquid separation device which is connected with the cold medium source for separating the gaseous cold medium with a liquid cold medium in the cold medium source and the spraying pipe which conveys the liquid cold medium to the body and is used for carrying out heat exchange on the heat transfer pipe and conveying the gaseous cold medium into the body. The multi-pipe spraying device can not only retain the advantages of a traditional spray