The invention relates to a solidification hidden-heat pump which uses low-level heat resource to de-frost. Its evaporator comprises two groups while two separation baffles (7) are arranged between them to divide the sealing space (5) into an icing room and two evaporation rooms, and said three rooms all have ejection device. Each ejection device is connected to the same water resource via pipeline. The invention has better property, lower cost, and easy production, while it can uses the low-level heat resource to supply water to spray de-frost with simple structure, lower energy-consumption and lower cost. |