Heating medium circulating device and thermal treatment equipment usint the device

The present invention provides an apparatus size and the installation space is not as big as the original heat medium circulation apparatus. Is provided in the heat medium circulating system (78) in the body is controlled as a control target temperature, a main heat exchanger (88) exchanging heat with the primary heat medium, the temperature of the circulating pump (84) is configured to control the heat medium circulation means in the heat medium circulating system downstream of the main heat exchanger, is provided using a thermoelectric cooling element (100) of the sub-heat exchanger (96) to control the temperature of the heat medium. Thereby, miniaturization of the device itself, and does not require a large installation space as the original.