Heat pump type high-temperature hot water heating efficient low-temperature crystallizer

The invention relates to the technical field of high-efficiency low-temperature crystallizers, in particular to a heat pump type high-temperature hot water heating high-efficiency low-temperature crystallizer which comprises a crystallization chamber, a condenser and a steam condensation chamber communicated with the crystallization chamber, and the crystallization chamber and the steam condensation chamber are both kept in a vacuum state. A refrigerant subjected to heat exchange in the evaporator is changed into a heating medium to be discharged into the heat pump mechanism through the compressor, the heat pump mechanism heats a solution in the evaporation chamber, and the vacuum pump maintains the interior of the crystallization chamber in a vacuum state, so that the solution in the crystallization chamber can be boiled and evaporated at a very low temperature; a heat medium circulating in the heat pump mechanism can enter the condenser, and the condenser exchanges heat of the heat medium to become a refrig