As the most professional manufacturer of cryogenic thermostat equipment in China. The company has a number of professional and technical personnel and advanced production equipment, the number of domestic users has exceeded 1,000, by Tsinghua University, Chinese Academy of Sciences, Zhejiang University, Jiangnan University, South China University of Technology, Wuhan University, Huazhong University of Science and Technology, Southeast University, Hunan University, Sichuan University , GE, Bright Dairy, Hiroyuki, Hong Kong University of Science and Technology and other well-known domestic universities and colleges.
The low temperature constant temperature tank is in line with the European Union standard. It is a high-precision constant temperature source with its own refrigeration and heating. It can be used for constant temperature experiment in the water tank of the machine, or connected to other equipment through the hose, and used as a constant temperature source. It is widely used in research departments such as petroleum, chemical, electronic instrumentation, physics, chemistry, bioengineering, medical and health, life science, light industry food, physical property testing and chemical analysis, colleges and universities, enterprise quality inspection and production departments, working for users. Provide a hot-cold controlled, uniform temperature field source, constant temperature test or test on test samples or products, or direct heating or cooling and auxiliary heating or cooling sources of heat or cold. Perfect after-sales service, a strong guarantee of the rights and interests of customers.
Summarize the common faults of the cryostat with the following 6 points:
Fault 1. The high pressure is too high during the operation of the cryostat :
Analysis of the cause: The high pressure is too high during operation. Usually, the flow rate of a cooling water is too small or the water temperature is too high. Just increase the cooling water flow rate or lower the water temperature. b. Condenser copper tube/fin fin deposit, heat transfer effect Poor, at this time, it is necessary to clean the heat exchanger of the low temperature thermostat. c. There is too much refrigerant. When the refrigerant is too much, it is necessary to discharge the refrigerant. The expansion of the refrigerant d is too small, and only the expansion degree of the expansion valve needs to be properly adjusted.
Fault 2, the cryostat can not be started or stopped immediately after starting:
Analysis of the cause: The fault is usually caused by power failure or low voltage of the power supply. As long as the circuit fault is eliminated, the power supply can be supplied according to the low temperature thermostat. b. The thermostat is improperly set, so that the contacts are normally open, and only the temperature control needs to be re-adjusted. Set value; c cooling water is not open, the interlock circuit is disconnected, then only need to open the cooling system, turn on the interlock circuit can be protected after the protection device is not reset, press the stop button and then turn on the machine
Fault 3 : Low pressure bath is running low pressure:
Analysis of the cause: The occurrence of low pressure is mainly caused by the following reasons: a. The refrigerant is insufficient, only need to make up the leak, supplement the refrigerant or adjust the expansion valve, b. The filter needs to be cleaned or replaced when the filter is c. The expansion valve is opened. Too small, properly adjust the opening degree of the expansion valve d. Capillary plugging of the cryostat as long as the capillary is cleaned or replaced;
Fault 4, the frozen water pump does not produce water:
Reason analysis: The low temperature constant temperature tank freezing water pump does not discharge water mainly because a. water pump steering reverse b. impeller blockage mainly solves a. correct pump motor steering b. cleaning pump impeller;
Fault 5, return air pipe and compressor casing frosting:
Analysis of the cause: The frosting of the low temperature thermostat return pipe and the compressor casing is mainly caused by three reasons: a. The expansion valve opening degree is too large, b. The refrigerant is too much c. The heat load is too small. The solution is: a adjustment expansion The valve b discharges part of the refrigerant c to increase the heat load or open the bypass circuit of the frozen water circuit;
Fault 6, insufficient flow of frozen water pump:
Analysis of the cause: The main cause of insufficient flow is a. Impeller or water pipe blockage b. Impeller damage is mainly solved by the following two methods: a. Cleaning the impeller or water pump b. Replacing the impeller.
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