The key points of using cryogenic refrigerator for cooling reaction
The cryogenic refrigerator is also called chiller or cryogenic refrigeration circulator. It is an experimental instrument that can achieve low temperature -110 degrees refrigeration. This kind of equipment is often used in single-fluid refrigeration tests. It is not the same type of equipment as general space refrigeration, cold storage, and refrigerator. So, what are the key points to pay attention to when using low-temperature refrigerators?
1. When the low-temperature refrigerator is used for the first time, use a multimeter to check whether the power plug connected to the device is normal, whether there is a short circuit or a bad state, if there is no abnormality, it can be used normally;
2. After the low-temperature refrigerator is connected to the power supply, add the corresponding circulating water according to the requirements, turn on the power switch on the equipment, and the circulating water starts to run;
3. Set the temperature range of the low-temperature refrigerator, set the high and low temperature ranges, and make observations. If the temperature range is large, continue to adjust the temperature range;
4. Low-temperature refrigeration circulating water is generally distilled water or manufacturer's circulating water. Do not use inlet water or river water, which will cause the circulation pipeline to block. If you use tap water, it is recommended to clean the pipeline every year;
5. Check the piping, refrigerant, etc. of the cryogenic refrigerator every six months for leakage and leakage, which can be distinguished according to the display parameters of the pressure gauge. If the data is far from the usual data, you can make a comparison;
6. The refrigeration system of low-temperature refrigerators needs to formulate an annual cleaning plan, including: heat dissipation pipes, condensing parts, cooling water towers, etc., to avoid system blockage and make the refrigeration system run more suitable. 7. If the low-temperature refrigerator is not used for a long time, it is recommended to turn off the water pump, compressor and power circuit switches of the equipment.
to sum up Low temperature refrigerators generally use pid temperature control technology. Different models of different manufacturers have different temperature accuracy. There are two types of slotting or fully enclosed. The cooling method also has two types of air cooling and water cooling. In order to achieve a better effect of reducing the temperature of the material, it is necessary Choose carefully.
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