DLSB series of low-temperature coolant circulation pump using air-cooled fully enclosed compressor refrigeration and microcomputer intelligent control system to provide low-temperature cooling water (liquid) flow or low temperature water (liquid) flow to meet the cooling water and cryogenic liquid to cool or Constant temperature instruments, such as rotary evaporator, electron microscope, low temperature chemical reaction kettle, electron spectrometer, densitometer, freeze dryer, reactor, etc., but also a variety of solvents directly in the tank cryogenic experiments. Features: 1, air-cooled fully enclosed compressor refrigeration, microcomputer intelligent refrigeration control system automatically open, refrigeration system with delay, overheating, over-current and other multiple protection devices. 2, circulating pump tank can be cold liquid output, cooling or constant temperature outside the experimental container or to establish a second temperature field. 3, the computer has a timer off function, turn on this function can be set within 0 ~ 100 hours at any time off time. 4, Double windows, red and green LED display temperature setpoint and temperature measurement, digital resolution of 0.1 ℃, the microcomputer can correct the deviation of the temperature measurement, the digital display accuracy of 0.1 ℃. 5, with a microcomputer Software lock function, the system can lock the system settings, irrelevant personnel may not change the parameters have been set. 6, All of the above operations are done by pressing the touch soft key on the PC intelligent controller, which is easy to operate. 7, the product easy to use, continuous work. Uses: DLSB series of low temperature circulating pump, is to take the form of mechanical refrigeration liquid circulation equipment. Has to provide low temperature liquid, low temperature water bath role. Combined with rotary evaporator, vacuum freeze-drying oven, circulating water vacuum pump, magnetic stirrer and other instruments, multi-functional low-temperature chemical reaction operations and drug storage. Large-scale low-temperature cooling circulating pump constant current, constant pressure, circulating fluid to meet the electron microscope, electron probe, ultra-high vacuum sputtering instrument, X-ray machines, lasers, Qi lights to speed up the expensive equipment cooling needs. For high purity metals, purification of rare substances, environmental experiments and magnetron sputtering, vacuum coating and other large equipment, to meet the pure temperature and water quality requirements of the cooling water. The equipment is especially suitable for laboratories of chemical, biological and physical laboratories that need to maintain low temperature and normal temperature. They are laboratories of medical and health, chemical industry, food industry, metallurgical industry, universities, scientific research, genetic engineering and polymer engineering The necessary equipment (according to user needs custom-made large-capacity low-temperature coolant circulation pump).