Evaporator

The utility model discloses an evaporator comprising a heat exchanger, wherein the heat exchanger is provided with a liquid outlet chamber, an evaporation chamber and a liquid inlet chamber; and a corrugated tube communicated with the liquid outlet chamber and the liquid inlet chamber is mounted in the vertical direction in the evaporation chamber. Due to the special structure of the corrugated tube, when paracetamol mother liquor flows from the bottom up in the corrugated tube under the action of thermal power, the fluidity and the direction of the paracetamol mother liquor in the corrugated tube change constantly, so as to achieve a self-cleaning efficacy, that is, the flowing paracetamol mother liquor forms eddy flows one by one in the half-cylinder shaped wrinkles of the corrugated tube to flush the inner wall of the corrugated tube, so as to achieve the self-cleaning efficacy.