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利来w66下载报道High and low temperature can not be kept cold repair methods is how?_利来w66下载官网资讯

Publisher:Shanghai Commodities Dayton laboratory equipment  Published:2014-01-13  Click:905

Refrigeration compressor failure analysis: the first observation of high and low temperature box in the operation process of high and low temperature test chamber can start, if high and low temperature of compressor in operation process to be able to start, from the main power supply to the compressor of the electric circuit is normal, high and low temperature box electrical system there would be no problem. When the high and low temperature box of electric system are all no problem, is to continue to check the refrigeration system. First check the two groups of the high and low temperature box of refrigeration compressor unit, if the low temperature (R23) stage compressor exhaust and suction pressure is lower than normal, and inspiratory pressure in time state, which means the main refrigeration unit refrigeration dose obviously deficiencies. Again with the hand to touch the main unit of the high and low temperature box of R23 exhaust and suction pipe of the compressor, such as found that the temperature of the exhaust line is not high, the temperature of the suction piping is not low (frost), it also illustrates the main unit R23 lack of refrigerant. High and low temperature test chamber of a main unit, another for auxiliary units, the cooling rate is large, two groups of the unit to work at the same time, the temperature keep the early stage, the two groups of the unit is still working at the same time. For initial temperature stabilized, auxiliary unit stop working, by the main unit to maintain the temperature of cooling and stability. R23 reveal that if the main unit, will make the main units of cooling effect is not big, because the cooling process, the two units work together at the same time, so there is no temperature stability of phenomenon, and instructs the cooling rate is reduced. In temperature stage, once the auxiliary units to stop working, and the main unit and no cooling, high and low temperature test of the air temperature in the cabinet will slowly rise, when the temperature rises to a certain extent, control system will again start the auxiliary unit to cool, then auxiliary units to stop working, and so on, then there will be a failure phenomenon of low temperature keep not to live.

At this point, has confirmed the cause of the problem of the high and low temperature box of refrigeration unit is the master of the low temperature refrigerant leakage R23 R23 level units.

High and low temperature test chamber maintenance methods: refrigeration system of high and low temperature test chamber leak, leak detector, and the combination of soap and water way to check where is funnelled, if discovery is the hot gas bypass solenoid valve stem crack for thin seam, replace the electromagnetic valve, the rest of the leak is found, with oxygen welding will leak repair welding is complete, again on the system to fluorine, system can resume normal operation.

By the above it can be seen that the high and low temperature test chamber low temperature cannot keep failure phenomenon, analysis, and judgment from easy to difficult, basically outside before, after the first electric air conditioning way carries on the analysis and judgment, familiar with and understand the principle and working process of the high and low temperature test chamber of is the basis of analyzing the fault judgment. Only understanding the working principle and working process of the high and low temperature test chamber, high and low temperature test chamber can quickly solve the various problems in the process of running.

    
 
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