The hot and cold unit is divided into two parts: a heating part and a cooling part. Temperature control temperature is accurate, widely used in injection molding, chemical, rubber extrusion, reactor, blow molding and other industries. The hot and cold integrated machine can realize mutual switching to speed up the production schedule, reduce energy consumption, improve the molding efficiency of the product, suppress product defects, and reduce the generation of defective products. Computer touch control, automatic calculation, multi-point temperature control unit can be customized. It can automatically and accurately control the temperature, and can quickly reach the set temperature. The set value and the actual value are displayed separately. Isolated electrical control box, extended electrical appliance life, pipeline explosion-proof device, built-in safety protection, low noise, high temperature corrosion resistance, rust prevention, unique heating design, energy saving and durable for different temperature control places.