Humidity ChamberSeveral stability setting tips you don't know about

Constant humidity, constant humiditytest chamberHalf of the stability comes from the manufacturer's design, which cannot be changed by customers during use; The other half is the settings during use, which can be controlled by the customer themselves. The quality of a machine largely depends on how it is used, but most factory users have not received professional training and can only operate it according to a single instruction manual, making it difficult to achieve the desired state. belowShanghai Jianhu Instrument Equipment Co., LtdTell everyone how to set it upHumidity ChamberStability.

Speaking ofHumidity ChamberStability must be discussedHumidity ChamberThe refrigeration system.Humidity ChamberThe medium temperature refrigerant commonly used in single-stage refrigeration cycles is R404A, and its evaporation temperature at one atmosphere is-46.5℃, but the heat transfer temperature difference of air-cooled condenser is usually taken as10Around ℃, which means that the box can only be used for production-36.5What should be done to achieve a lower temperature, given the low temperature of ℃? At this point, by reducing the evaporation pressure of the compressor, it is possible toR404AThe lowest evaporation temperature of the refrigerant is reduced to-50℃, so we need to obtain-50When the temperature is below ℃, a refrigeration cycle with a combination of medium temperature refrigerant and low-temperature refrigerant must be adopted to ensureHumidity ChamberRefrigeration stability.

Humidity ChamberThe refrigeration system and compressor complement each other, and the lowest evaporation temperature of a single-stage vapor compression refrigeration machine mainly depends on its condensing pressure and compression ratio. Baoyuntong technicians have summarized an experience: firstly, for any refrigerant, the lower the evaporation temperature, the lower the evaporation pressure. 2、 When the evaporation temperature is too low, some commonly used refrigerants have reached the solidification temperature and cannot achieve refrigerant flow and circulation. 3、 The evaporation pressure decreases, the volume of refrigerant increases, and the mass flow rate of refrigerant decreases. At this time, in order to obtain the required cooling capacity, it is necessary to increase the suction volume, making the compressor volume too large.

constant temperature and humiditytest chamberThe cooling and dehumidification of the machine are both achieved by the refrigeration system, but the same system can make the machine reach two different states, both of which rely on human operation. Therefore, it is very important to accurately set the working system of the constant temperature and humidity test chamber. Reasonable and correct use can achieve the results you want.