Shanghai low-temperature coolant circulation pump, Shanghai double-layer glass reactor, Shanghai rotary evaporator, Shanghai multifunctional reactor, high-temperature constant temperature cycler, water bath, high-pressure reactor ● air-cooled fully enclosed compressor unit refrigeration, microcomputer intelligent control refrigeration system automatically starts, the refrigeration system has multiple protection devices such as delay, overheating, overcurrent, etc. The circulation pump can output the cold liquid in the tank, cool or maintain the temperature of the experimental container outside the constant temperature machine, or establish a second constant temperature field. The microcomputer is equipped with a timed shutdown function, which allows for the setting of a timed shutdown time within 0-100 hours. Adopting dual window, red and green LED display for temperature setting and measurement values, with a digital display resolution of 0.1 ℃. The microcomputer can correct temperature measurement deviation, achieving a digital display accuracy of 1 ℃. Equipped with microcomputer software lock function, it can lock the set values of various system parameters, and unrelated personnel cannot change the set parameters. All the above operations are completed by pressing the touch soft keys on the microcomputer intelligent control instrument, and the operation is simple. The product is easy to use and can work continuously