A constant temperature refrigeration system for extensive temperature range application
comprising a refrigerator, a low-temperature heat exchanger, a medium-temperature
heat exchanger, a high-temperature heat exchanger, a pump, a first solenoid valve,
a second solenoid valve, a third solenoid valve, a temperature sensor, a power
regulator and a controller, the temperature sensor is utilized for determining
the working fluid temperature and compare the actual input temperature, the actual
output temperature and the predetermined temperature, and the controller is utilized
for controlling the first solenoid valve, the second solenoid valve and the third
solenoid valve for conveying the fluid to flow through various heat exchangers
so that the working fluid is heated or cooled, with the result being that the working
fluid temperature outputted is to reach the predetermined temperature, so as to
acquire the working fluid having the exactly and precisely predetermined low temperature
(-40 C. to 25 C.), medium temperature (25 C. to 50 C.)
or high temperature (50 C. to 100 C.) required during various industrial
manufacturing processes, a design that provides users with the energy-saving function
and system maintenance for normal operations.