Explosion-proof air conditioners work more safely than ordinary air conditioners in special environments. As a very popular type of explosion-proof equipment, they are relatively commonly used refrigeration systems in petroleum, chemical industry, military industry, metallurgy, coal mines, oil refining, ships, aviation, scientific research, pharmaceuticals, textiles, printing, cigarettes, dangerous warehouses, microelectronics enterprises, archives, wood and paper industries. Explosion-proof air conditioners are mainly used for temperature control of cooling and heating. During refrigeration, the main faults that occur are as follows:
refrigeration system blockage
often occurs at capillary and drying filter . There are three main reasons for blockage: dirty blockage, ice blockage and welding blockage.
dirty blockage usually occurs at the entrance of the capillary. It is because dirt in the system (such as welding slag, rust, scale , etc.) blocks the pipeline. When checking, gently tapping the capillary may temporarily return to normal. In addition, the location and properties of the blockage can be judged from the condensation, frost on the surface of the pipeline and component, and the pressure recovery speed and time during shutdown.
ice blocking generally occurs at the outlet of the capillary tube. It is because the system contains moisture. It suddenly vaporizes and cools down at the outlet of the capillary tube and condenses into small ice particles. When judging, you can use welding gun to heat at the outlet of the capillary tube. If the effect returns to normal or improves, it means that it is ice blocking, or the machine can be turned on after the air conditioner is turned off and the machine can be cooled for a period of time, which means it is ice blocking. Ice blocking generally occurs on a newly installed machine or newly repaired air conditioner.
welding blocking usually occurs at the welding of capillaries. The phenomenon is similar to dirty blocking and ice blocking, and it often occurs on new installation machines.
refrigeration system leak
air conditioner cooling and heating carrier is refrigerant. If the system leaks, the refrigerant leak will cause poor cooling or no cooling at all. The places where the air conditioner leaks are mainly concentrated in the welding joints of the two devices, the capillary welding, the compressor suction and exhaust pipe, horn mouth, copper sodium cracks, connecting pipes, etc., you can first visually check when checking, and focus on checking each joint of the connecting pipe. There are generally oil traces in the leakage area.
4-way valve fault
usually occurs during heating. The four-way valve is poorly absorbed, air-connected or stuck, causing poor heating performance. When judging, the four-way valve can be turned on and off and listen to whether the four-way valve is good. During maintenance, you can repeatedly turn on the four-way valve or gently tap the four-way valve to reset it.
33 check valve fault
check valve is directly conductive during cooling, but when heating is done, the refrigerant must pass through the auxiliary capillary. When the check valve is not tightly sealed or the auxiliary capillary is blocked, heating is affected. Therefore, if the air conditioner is normal for cooling but poor heating, the check of the check valve should be focused on after eliminating the problem of the four-way valve.
Zhongtong Intelligent Intelligent Environment Control Department
Explosion-proof air conditioner will not frequently fail during use. Once a failure occurs, the maintenance can be carried out according to the correct maintenance method to ensure the normal operation of the explosion-proof air conditioner. When the explosion-proof air conditioner refrigeration system fails, the main points in maintenance are:
Observe the working conditions of the internal and external units
For example, the display of the indicator light board, whether the internal unit is working, whether the wind speed output is normal, whether the external unit fan and compressor are operating, so as to determine whether it is an electrical problem or a system problem that does not refrigerate.
detects various data of the air conditioner
such as the drip of the air conditioner internal unit, the temperature difference of the inlet and outlet, the pressure value of the system pipeline, etc.
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