Wuhan Large Constant Temperature and Humidity RoomTo cope with complex climate impacts, its operation and troubleshooting need to be combined with local environmental characteristics. The specific plan is as follows:
1、 Operation and maintenance focus adapted to the climate of Wuhan
Preventing high temperature and humidity interference in summer: Wuhan's high humidity in summer can easily lead to a sudden increase in dehumidification load in constant humidity rooms. It is necessary to clean the dehumidification evaporator weekly and blow the dust on the fins with compressed air to avoid scaling and affecting heat dissipation; Check the pressure of the refrigeration system every month. If the R410A refrigerant pressure is lower than 0.8MPa, replenish it in a timely manner to prevent a decrease in refrigeration efficiency at high temperatures (temperature fluctuations in the room should be controlled to ≤± 0.5 ℃). At the same time, strengthen the ventilation of the computer room and install industrial exhaust fans (wind speed ≥ 2m/s) to prevent the equipment control cabinet from triggering overload protection due to high temperature (over 40 ℃).
Winter moisture-proof and antifreeze: Wuhan's wet and cold weather in winter can easily cause condensation in pipelines. It is necessary to check the humidifier pipeline daily and wrap the exposed pipeline with insulation cotton to prevent condensation from freezing and blocking; Start the electric heating auxiliary system every week (with a set temperature of 5 ℃) to prevent the evaporator from freezing and cracking. In addition, regularly (every 2 weeks) check the door sealing strip. If there is aging or deformation (such as the silicone strip becoming hard), replace it in a timely manner to prevent the infiltration of moist and cold air from the outside, which may cause RH fluctuations in the room to exceed ± 2%.
Daily maintenance of core components: Clean the air filter (primary and medium efficiency) every month. There is a lot of dust in Wuhan, and clogged filters can easily cause poor airflow circulation. Filters with a pressure difference exceeding 150Pa need to be replaced; Calibrate the temperature and humidity sensor every 3 months, compare it with a standard temperature and humidity meter (accuracy ± 0.1 ℃/± 1% RH), and adjust the deviation through device software if it exceeds the time limit; Check the bearings of the circulating fan every 6 months, add high and low temperature resistant lubricating grease (applicable temperature -30 ℃~150 ℃), and ensure that the fan speed is stable (± 50r/min).
IIWuhan Large Constant Temperature and Humidity RoomTargeted troubleshooting methods
Summer temperature and humidity control failure: If the temperature inside the room cannot be lowered, first check the cooling tower (if it is water-cooled). In Wuhan, the water temperature is high in summer, and the filling dirt of the cooling tower needs to be cleaned to ensure that the inlet water temperature is ≤ 32 ℃; If the temperature still exceeds the standard, check the compressor. If the current exceeds 1.2 times the rated value after the compressor is started, it may be due to the condenser being dirty and blocked, and a high-pressure water gun (pressure 0.3MPa) needs to be used for flushing. If the humidity cannot drop to the set value (such as requiring RH 50%, but actually exceeding 60%), check the dehumidification solenoid valve. If there is no action after power on, replace the valve core; If the solenoid valve is normal, check if the dehumidification evaporator has frost, activate the defrosting function or adjust the defrosting cycle (shortened to 4 hours/time in summer).
Frequent winter equipment alarms: If a "low temperature alarm" occurs, check the electric heating tube and measure the resistance with a multimeter. If the resistance is infinite, it means that the heating tube is burned out and needs to be replaced with a component of the same power (usually a single power of 3-5 kW); If the heating tube is normal, check the temperature controller and reset the threshold for parameter drift (such as calling the low control temperature 5 ℃ in winter). If there is a "humidification fault", check the water level sensor. The hard water quality in Wuhan can easily cause sensor scaling. Soak it in a 5% citric acid solution for cleaning; If the sensor is normal, check the humidification tank. If there is too much scale, it needs to be disassembled and cleaned to avoid dry burning of the heating tube.
Uneven airflow throughout the year: Large constant humidity rooms in Wuhan often experience local temperature and humidity deviations due to uneven sample stacking. It is necessary to adjust sample placement monthly and maintain a distance of ≥ 30cm from the air duct outlet. If there is still a deviation, check the airflow distribution board, and if it is loose or deformed, it needs to be re fixed to ensure uniform air velocity at the outlet (± 0.2m/s). In addition, regularly (every 3 months) check the return air valve. The high dust in Wuhan can easily cause the valve to get stuck. It is necessary to clean the valve plate and apply lubricant to ensure that the valve opens and closes flexibly.
Through the above operation and troubleshooting measures adapted to the climate of Wuhan, it is possible toWuhan Large Constant Temperature and Humidity RoomThe failure rate has been reduced by more than 65%, ensuring stable temperature and humidity control accuracy in accordance with the GB/T 2423.1-2008 standard, and meeting the production testing needs of industries such as electronics and pharmaceuticals.