Temperature control device of crystallization kettle

The utility model discloses a crystallization kettle temperature control device which comprises a heat exchange piece arranged in a crystallization kettle, and a refrigerant container, a conveying device and a temperature measuring device which are communicated with the heat exchange piece, the conveying device comprises a first conveying assembly and a refrigerant conveying assembly, and the first conveying assembly and the refrigerant conveying assembly are arranged in parallel. The first conveying assembly comprises a first refrigerant pump and a first adjusting valve. The refrigerant conveying assembly comprises a cooler, a refrigerant tank, a second refrigerant pump and a second adjusting valve which are communicated in sequence, and a refrigerant is cooled after passing through the cooler; outlet pipelines of the first regulating valve and the second regulating valve are converged and then communicated with an inlet of the heat exchange piece; the temperature measuring device comprises at least three te