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Solution to noise of dehumidifier
Due to the continuous high temperature and humidity in Meiyu season, there are many noise problems in dehumidifier during the working process of dehumidification equipment. After the physical machine detection and follow-up visit, the engineer found that there were many noise problems in the dehumidifier. Inform the maintenance personnel of each special station of the treatment results of the dehumidifier noise. There is "bang bang" drip noise in the dehumidifier. The reason of continuous condensation on the surface of the evaporator is that the condensation water can not be detected inside the water tank. The solution is to detect the start-up pressure to ensure that the low-pressure return air is more than 5.5kg. If necessary, open the dehumidifier shell and observe the frosting of the dehumidifier, especially the middle pipeline and condenser are fully filled. After adding freon, please carefully check whether there is dew point. After using the dehumidifier for a period of time, the dehumidifier frosts in many cases The defrosting of dehumidifier is caused by the failure of dehumidifier, and there is also normal frosting process. Dehumidifier users need not worry about it. The defrosting process of dehumidifier will eliminate the frosting problem. The frosting of dehumidifier is mainly caused by freezing and blocking at the interface between capillary tube and evaporator, because the joint part of capillary tube and evaporator is small pipe connected with large pipe. When the refrigerant leaves the capillary port, the volume expands, that is to say, it has the effect of pressure reduction and expansion, and then the water in it is frozen into ice, blocking the hole, so that the refrigerant can not enter the evaporation The evaporator is heated by evaporation, so the frost layer on the evaporator melts itself, but the interface between the capillary and the evaporator is full of frost. The defrosting fault of dehumidifier has the following characteristics: when the compressor starts to work, the condenser is heated by hand, the low-pressure suction pipe is cool, and all the evaporators are frosted; the temperature in the room drops; the condenser is not hot after a period of time. The low pressure suction pipe is not cool, the temperature in the room rises, and the frost layer on the evaporator melts. When the frost layer on the evaporator begins to melt, the sound of the air flow at the capillary outlet decreases and there is an intermittent blocking sound; when the outlet of the capillary tube is dried with an electric ferrochrome or alcohol lamp, the sound of the air flow increases and the evaporator frosts immediately, which indicates that the phenomenon is "ice jam"; In the refrigeration system, a vacuum gauge is connected to the low-pressure end to test. When the low-pressure pressure is negative, it indicates that ice jam occurs in the capillary. The causes of dehumidifier frosting are moisture in refrigerant, moisture in refrigeration oil and moisture in refrigeration system without drying and evacuation. Noise treatment caused by water spray of dehumidification equipment. Cause first of all, observe whether the water flows out from the water tank at the outer edge of the evaporator. If so, there are two reasons for the lack of refrigerant. The evaporator is blocked and the condenser is not completely dewed. The condensate water is disconnected from the water tank at the outer edge of the evaporator. Solution: check the pressure. If the evaporator of dehumidifier is blocked (mostly concentrated at the three groups of high-pressure nozzles), mark it, remove the welding nitrogen and blow it through. < / P > < p > in addition, if the surface condensation of evaporator of dehumidifier is normal, or there is water dripping in the internal machine, please clean the aluminum sheet of evaporator, and use quick cleaning agent to brush the internal and external surface to remove the oil stains on the surface of aluminum sheet, increase the adhesion of aluminum sheet to water, and make water flow downstream to the water tank, which has a better effect.
