The present invention relates to a multipurpose food washing machine. The food washing machine according to the present invention includes: a washing space filled with washing water so that washing is performed on a washing target put into the washing space washing means for washing the washing target in the washing space a heat exchange pipe disposed via the washing space and causing the washing water to be heated by discharging heat to the washing water and heating means capable of performing heating such that the temperature of the washing water can be maintained at 72 degrees Celsius or higher. The washing machine according to the present invention is capable of raising the temperature of the water in the washing space to a temperature at which sterilization can be performed by means of the heat exchange pipe positioned in the washing space in a state where the washing space filled with the washing water and the washing target is filled with the water, and thus the washing machine according to the present invention can have a washing function and perform food washing while maintaining an appropriate temperature by means of heating. In addition, the washing machine according to the present invention can perform a sterilization treatment. The washing means uses bubbles such that the washing is performed with air bubbles generated in the washing space. In a case where an oxygen supply pipe supplying oxygen for the air bubble generation is provided with gas backflow prevention means, a phenomenon can be prevented in which components such as a blower malfunction or break down due to vapor.COPYRIGHT KIPO 2017본 발명은 다용도 식품 세척기에 관한 것이다.본 발명의 식품 세척기는, 세척수가 채워지고, 세척대상물이 투입되어 세척이 이루어지는 세척공간을 갖는다.또, 세척공간의 세척대상물이 세척되도록 하는 세척수단을 갖는다.또, 세척공간을 경유하도록 설치되어 있고 세척수에 열을 방출하여 세척수가 가열되도록 하는 열교환파이프를 가지며, 세척수의 온도가 적어도 72℃의 온도가 유지되도록 가열할 수 있는 가열수단을 갖는다.본 발명의 세척기는 세척수와 세척대상물이 채워지는 세척공간에 물이 채워진 상태에서 세척공간에 위치된 열교환파이프를 통해 세척공간에 채워진 물의 온도를 살균이 가능한 온도까지 올릴 수 있도록 되어 있으므로 세척기능을 가지는 것은 물론 가열을 통해 적
