What should I do if the high and low temperature damp heat test chamber overpressure alarm?
First, the ambient temperature of the high and low temperature test chamber is too high.
The recommended temperature for the high and low temperature test chamber is about +25 degrees, which is most suitable. Of course, it is impossible for each customer to ensure that the environment of the high and low temperature test chamber is so perfect, so it is also between +5 degrees and +35 degrees. The problem is not too big, but when the temperature is too high, it is easy to cause overpressure.
How can we keep the ambient temperature of the high and low temperature test chambers better? The qualified customers can use the air conditioner to make the high and low temperature test chambers in the air-conditioned room, which is most suitable. However, no matter what place, it is necessary to keep the air circulation around the high and low temperature test chambers unobstructed. The distance between the front, back, left and right and other objects or walls is more than 60 cm, so that it can have better heat dissipation function. , it is necessary to install an exhaust pipe to direct the hot air directly to the outdoor, and often maintain and ensure the trouble-free operation of the exhaust motor.
Second, the over-pressure alarm caused by the condenser fan in the refrigeration system of the high and low temperature test chamber does not rotate or the aging speed is slow or the temperature sensing rod of the compressor fails.
The refrigeration system of the high and low temperature test chamber is composed of a refrigeration unit such as a compressor, a condenser, an evaporator, a dry filter, an expansion valve, a liquid storage bottle, etc., and when the condensation fan is damaged or damaged, the pressure in the compressor rises instantaneously. High, and cause overpressure alarm; if the temperature sensor of the compressor fails, it will also cause an illusion of overpressure. Dongguan Seth has encountered several cases in the process of repairing high and low temperature test chambers, especially in the case of The northern region is more common.
Third, the lack of refrigerant in the cascade refrigeration system or the instantaneous damage of the compressor can cause overpressure in the refrigeration system.
When one of the refrigerants in the cascade refrigeration system leaks, an alarm phenomenon will occur at this time, but please do not blindly add the refrigerant. You should have a qualified qualified maintenance and repair organization like Dongguan Saisi. To check whether there are leaks in the pipeline, if there is a step of filling the pressure, vacuuming, etc., then add the right amount of refrigerant of the same type. An overpressure alarm may also occur when one of the compressors is damaged in an instant.
The above three phenomena are the common high-low temperature test chambers, why there is an overpressure alarm phenomenon, and there are more reasons such as circuit failure, control system failure, etc., all require engineering personnel to conduct on-site inspection before the final in conclusion.
Hongzhan has a research institute specializing in the research and development of environmental test equipment. It has mature loop test development methods and laboratories, and gathers a group of outstanding talents and well-known experts in the industry. The strong R&D team leads the domestic loop test technology. Development direction. At present, the company has high and low temperature test chambers with independent intellectual property rights, high and low temperature wet heat test chambers, rapid temperature change test chambers, thermal shock test chambers, three comprehensive test chambers, high and low temperature low pressure test chambers, solar radiation test chambers. The climatic environment test equipment and customized products such as industrial ovens and walk-in high and low temperature damp heat test chambers and high wind speed rain test chambers are at the leading domestic level and international high standards.
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