A clogged cooling tower filter is a dirty system. Under normal circumstances, dirt blockage often occurs at the filter, because the filter screen of the filter blocks the channel section, filtering out debris such as dirt and metal chips, and the refrigeration and air conditioning will be blocked after a long time. The consequence of filter blockage is the reduction of refrigerant circulation, many of which are similar to the opening of the expansion valve being too small, such as the increase in the suction and discharge temperature of the compressor, the drop in the suction and discharge pressure of the compressor, and the rise in the temperature of the air-conditioning room. The point is that the filter outlet temperature is getting lower and lower. This is because throttling starts at the filter, which reduces the local temperature of the system, and in severe cases, local frost or ice formation in the system occurs. Excessive load of air-conditioned room Due to the effect of internal and external disturbances in the room and the influence of various factors, the excessive load of the air-conditioned room will cause the temperature of the air-conditioned room to rise, and finally the temperature index that should be maintained in the normal air-conditioned room cannot be achieved. At the same time, the two most affected parameters are compressor suction temperature and discharge temperature. Due to the influence of the heat capacity of the air-conditioned room, after a certain period of time, the influence of other parameters will be obvious. The cooling water flow is too small. Due to the relationship between the cooling water pipe and the cooling water valve, and the configuration of the cooling equipment
in the system is too small or there is too much scale in the cooling tower, the cooling water flow is too small and the cooling water inlet temperature is too high. It is also a common fault. When the cooling water flow is too small, the heat exchange effect of the condenser decreases, so the temperature of the refrigerant at the outlet of the condenser rises, and the condensing temperature of the refrigerant rises, which reduces the cooling coefficient and affects the cooling effect. Under the condition that other conditions remain unchanged, the temperature of the air-conditioned room will also rise to a certain extent, and the suction temperature of the compressor will also rise. But the most obvious change is that the temperature difference at the cooling water outlet will become larger and larger.
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