External circulation: Through the circulation capacity of the pump, the insulated hose is connected with the external equipment by the water outlet to form a closed loop, which flows back to the water inlet of the equipment, and externally introduces the constant temperature medium in the tank to establish an external constant temperature field. Internal circulation: The circulation of the liquid medium in the tank by the pump increases the uniformity of the temperature in the tank and reduces the temperature fluctuation. Application areas of circulating water thermostats: Biochemical fields: rotary evaporator, Abbe refractometer, polarimeter, atomic absorption, ICP-MS, ICP, nuclear magnetic resonance, CCD, biological fermenter, chemical reactor (synthesizer), etc. Materials: Electron microscopy, X-ray diffraction, X-ray fluorescence, vacuum sputtering, vacuum coating machines, ICP etching, various semiconductor devices, fatigue testing machines, chemical deposition systems, atomic deposition systems, etc. Medical field: superconducting magnetic resonance, linear accelerator, CT, low magnetic field nuclear magnetic resonance, X-ray machine, microwave therapy machine, medical cold cap, cooling blanket and so on. Physicochemical fields: lasers, magnetic fields, various molecular pumps, diffusion pumps, ion pumps, and materials. A variety of water-cooling equipment used.
Energy savings – Cooling water can be recycled in the system loop during summer and high ambient temperatures, saving a lot of water. More efficient – ​​a circulating water unit can meet the cooling needs of multiple external equipment at the same time, providing a constant temperature source for condensation experiments. Temperature control accuracy - PID temperature control technology, built-in PT100 sensor, high temperature control accuracy, temperature digital display, intuitive operation and high security - self-diagnosis function; freezer overload protection and other security functions. Low temperature antifreeze solution A solution of ethylene glycol: ethylene glycol / water 55 / 45 (-30 ° C), 70 / 30 (-40 ° C) B glycerol aqueous solution: glycerol / water 70 / 30 (- 30 ° C) In use, it is necessary to check the density of low temperature antifreeze to meet the following requirements: 1. Aqueous solution of ethylene glycol: P20 = 1079 kg / m3 (-30 ° C) (-40 ° C) 2. Aqueous glycerol solution: When P20=1182.6kg/m3 (-30°C), the minimum temperature of the antifreeze must be above 0°C. Cooling water selection: Generally, small-circulating water cooling thermostats with a cooling capacity of less than 1000W are widely used in laboratory condensing devices such as low-power lasers, parallel evaporators, parallel quantitative concentrators, parallel reactors, and distillation meters. Medium-sized circulating water cooling thermostats with a cooling capacity of less than 6000W are widely used in analytical instrument industries such as AAS, ICP, ICP-MS, and electron microscopy, and laboratory equipment such as rotary evaporator, Soxhlet extraction, solid-liquid extraction, and Kjeldahl analyzer. , laser marking machine, laser cutting machine and other laser instruments and machine tool industry. Large circulating water cooling thermostat with refrigeration capacity above 10KW is widely used in X-ray diffractometer, magnetic mass spectrometer, fatigue testing machine, vacuum coating machine, plastic forming equipment, laser cutting machine, X-ray fluorescence spectrometer, infrared spectrometer, differential thermal analysis. Instruments, nuclear magnetic resonance and other equipment with high refrigeration constant temperature requirements.
In the development of the bio-industry, the experimental requirements for the application of ultrasonic cell pulverizers have also increased, such as the determination and control of sample temperature, the improvement of the temperature of cryogenically cooled samples and the whole machine, etc., all of which have put forward new requirements. .
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