Answer: High ambient temperature is very unfavorable to the heat dissipation of the dryer refrigeration system. When the ambient temperature is higher than the normal refrigerant condensation temperature, the refrigerant condensation pressure is forced to increase, which will reduce the refrigeration capacity of the compressor and eventually lead to an increase in the "pressure dew point" of the compressed air.
Generally speaking, a lower ambient temperature is beneficial to the operation of the dryer. However, at too low an ambient temperature (for example, below), although the compressed air temperature entering the dryer is low, the dew point of the compressed air will not change significantly. However, when the condensed water is drained out through the automatic drainer, it is likely to freeze at the drain port, which must be prevented. In addition, when the machine is shut down, the condensed water originally accumulated in the dryer evaporator or the condensed water accumulated in the automatic drainer water storage cup may freeze, and the cooling water stored in the condenser may also freeze. All of this will cause damage to the relevant parts of the dryer.
What users should be reminded of is that when the ambient temperature is lower than, the compressed air pipeline itself is equivalent to a well-functioning cold dryer. At this time, attention should be paid to the treatment of condensed water in the pipeline itself. Therefore, many manufacturers clearly stipulate in the cold dryer manual: Do not use the cold dryer when the temperature is lower than.
In addition, the cold dryer has the following requirements for its surrounding environment:
① Ventilation, which is especially necessary for air-cooled cold dryers;
② There should not be too much dust;
③ There should be no direct radiation heat source at the site where the cold dryer is used;
④ There should be no corrosive gases in the air, especially ammonia. Because ammonia has a strong corrosive effect on metallic copper in a water environment. Therefore, the cold dryer should not be installed together with ammonia refrigeration equipment.
