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The reason why the temperature of small high and low temperature test box is too slow

Source: website release time: November 6, 2019 13:46:00 reading: 468 application Small high and low temperature test box In the whole process of the small high and low temperature test box, the temperature drop is slow, the temperature can not fall down, the temperature can not reach - 40 degrees, the following for you to analyze the reasons for slow temperature reduction of small high and low temperature test box and solutions:
 The reason why the temperature of small high and low temperature test box is too slow
   under normal conditions, the temperature of small high and low temperature test box will be reduced to the relative value according to the set starting and ending dates. However, due to the long application time of machinery and equipment, or poor actual operation, slow temperature reduction of high and low temperature chambers will be caused. Now, how to deal with this difficult problem is discussed in a technical way.
   1. The causes of common faults were not determined, and the causes of common faults were determined by integrating the whole operation process of the experimental department. The small high and low temperature test box has two refrigeration units.
   2. One is the leading generator set and the other is the auxiliary generator set. When the cooling rate is very high, the two generator sets work together. In the early stage of temperature maintenance, the two generating sets are still working together. When the temperature enters the state step by step, the auxiliary generator unit stops working, and the main generator set keeps the temperature stable. If R23 of the main generator unit leaks, the actual cooling effect of the main generator set will not be great. Because during the whole process of temperature reduction, the two generating units are working together, so there is no problem of stable temperature, but the cooling speed is reduced. If the temperature of the auxiliary generator set is reduced to 55 degrees, the auxiliary generator will stop working when the auxiliary generator unit is in the low temperature range Constantly, there will be problems. It has been determined that the common fault of production and manufacture is the leakage of refrigerant R23 of super low temperature (R23) generator set of main generator set. The leakage of the refrigeration unit was checked by means of leak detector and soap solution. It was found that the valve rod of a heat flow bypass valve relay was cracked about 1cm. When the relay is replaced, the system is filled with fluorine again, and the system software operates normally