Summer has arrived, delicateHigh and low temperature test chamberThe small problem also came one after another, which is the overpressure alarm. This small fault is closely related to the installation environment of the equipment. The suitable temperature for the high and low temperature test chamber is around+20 degrees ZUI. Of course, it is impossible for every customer to guarantee the use environment of the high and low temperature test chamber like this, so the problem is not too big between+5 degrees and+35 degrees. However, when the temperature is too high, it is easy to cause overpressure.

The overpressure alarm is caused by reasons such as the condenser fan in the refrigeration system of the high and low temperature test chamber not rotating, aging and slow speed, or the failure of the temperature sensing rod of the compressor. The refrigeration system of the high and low temperature test chamber consists of refrigeration components such as compressor, condenser, evaporator, filter, expansion valve or capillary tube, liquid storage bottle, etc. When the condensing fan fails or is damaged, the pressure inside the compressor will instantly rise, causing an overpressure alarm; When the temperature sensing rod of the compressor malfunctions, it can also cause a false alarm of overpressure, which has been encountered in several cases during the maintenance of high and low temperature test chambers, especially in northern regions.

The lack of refrigerant or instantaneous damage to the compressor in a cascade refrigeration system can cause overpressure in the refrigeration system. When one stage of the refrigerant in the cascade refrigeration system leaks, an alarm will appear. However, please do not blindly add refrigerant. You should ask a qualified maintenance and repair organization to check whether there are any leakage points in the pipeline. If there are, after repairing them, maintain pressure, vacuum and other steps, you can add an appropriate amount of refrigerant of the same model. When one of the compressors is instantly damaged, an overpressure alarm may also occur.

How to makeHigh and low temperature test chamberIs the ambient temperature maintained well? Customers with conditions can use air conditioning to place the high and low temperature test chamber in the air-conditioned room, making ZUI suitable. But regardless of the location, it is necessary to maintain smooth air circulation around the high and low temperature test chamber, with a distance of more than 60 centimeters between the front, back, left, right, and other objects or walls, so that it can have good heat dissipation function. If it is an upward exhaust duct, it is necessary to install an exhaust pipe to directly guide the hot air outdoors, and maintain it regularly to ensure the operation of the exhaust motor.