Normally, the suction tube feels cool and has dew. Under abnormal circumstances, the first one is that the suction tube is too cold and dew is too much to cause the large area of the shell to dew. The reason is that the refrigerant flow is too large, the liquid can not be completely vaporized in the evaporator, and there is a liquid backflow phenomenon. The danger is that the compressor may run on wet stroke. When it is serious, it will produce liquid blow and the valve piece will be threatened. Two, the suction tube is not cold, no condensation, and the shell is very hot. The reason is that the refrigerant flow is too small or the cooling dose is not enough. The result is that the exhaust temperature rises and the cooling capacity decreases.
The basic situation is the same as the infusion tube, but it has a prominent abnormal phenomenon, that is, the filter may be cool. The reason is that the filter mesh is blocked by the sludge and the filter is not smooth. When the refrigerant flow filter network, there is a throttle phenomenon, that is, a part of the liquid vaporizing heat, making the filter cool, serious meeting Dew. Another abnormal phenomenon is that the filter is not hot, which is equivalent to the ambient temperature. The reason is that the filter screen is completely blocked and the refrigerant can not flow. www.ahyaohui.com
Condenser temperature condition: normally, the first half of the radiator tube is very hot, and its temperature has slowly slow gradual decline of the balance. The heat sensitivity of the second half is greatly reduced compared with the first half, which is due to the gradual liquefaction of the refrigerant in the rear half of the tube, which has reached the condensation temperature and the supercooling temperature. When abnormal conditions are produced, one is not too hot in the first half, and the second half is close to the normal temperature (ambient temperature), because the compressor sucked the wet steam refrigerant or the cooling dose was insufficient. The other is that the whole condensing tube is very hot due to too much refrigerant or small ventilation or high ambient temperature.
Water cooled condenser: shell and tube condenser shell under normal condition is the upper part is relatively hot, the lower part is warm. Under abnormal conditions, the whole shell is not too hot, because the cooling dose is not enough. The other case is that the whole shell is very hot due to inadequate cooling water or poor heat dissipation (scaling in the water pipe). Under normal conditions, the casing is very hot in appearance, because the cooling water is too small or the heat dissipation is poor; the other is that the outer surface of the whole casing is not too hot, and the reason is that the cooling dose is insufficient. Under normal circumstances, the suction tube feels cool and has dew. The reason is that the condenser has poor heat dissipation, high condensation temperature or too much cooling dose.