WATER-COOLED CONSTANT TEMPERATURE LIQUID CIRCULATING DEVICE AND METHOD OF CONTROLLING TEMPERATURE OF CIRCULATING LIQUID WITH THE SAME

摘要

To provide a water-cooled constant temperature liquid circulating device in which the stability in temperature of circulating liquid can be improved by optimizing a flow channel of radiating water and a method of controlling the temperature of circulating liquid in the same device. In a water-cooled constant temperature liquid circulating device in which a heat exchange portion of the radiator tube, in which radiating water which is controlled in flow amount flows therein, is attached to a tank, a pump is provided in a conduit which allows the circulating liquid in the tank to circulate through the external device, and constant temperature circulating liquid is delivered into the piping in the external device by the pump, comprising: an electric proportional valve for controlling the flow amount of radiating water to be delivered to the heat exchange portion of the radiator tube and an electromagnetic valve for delivering the radiating water, which is controlled in flow amount by the electric proportional valve, to the heat exchange portion in an optimal flow amount regulated by controlling the opening-closing duration thereof. The electric proportional valve is controlled to a flow amount suitable for heat exchange with respect to circulating liquid at the heat exchange portion and equal to, or larger than, a low flow limit value that can be controlled by the electric proportional valve, or to an amount slightly larger than that value.