Power supply factors. In many places, the power supply network fluctuates greatly, and the operating conditions of imported refrigeration units will be affected, resulting in insufficient power to jam the machine and burn out the coil.
Poor heat dissipation, insufficient water supply in the outdoor cooling system of the water-cooled unit will cause slow circulation, and the heat of the unit cannot be taken away in time, causing the unit to overheat and the cooling function attenuation over time. The machine is running but the cooling effect is not good, or the temperature is not cooling. The internal scale of the double-pipe type cold heat exchanger is too deep to take away the heat exchange of the unit in the first time, which will also cause the degradation of the refrigeration function. The machine is running but the cooling effect is not good, or the temperature is not cooling.
The door of the test system was not closed properly, which caused the machine to be seriously overloaded, and long-term severe frost could also cause damage to the ultra-low temperature equipment.
During the operation of the test box, the amount of heat-conducting items stored in the box is too much, resulting in insufficient energy for the refrigeration system, and a large horse-drawn cart. There is also too much heat conduction items stored in the test box during operation. When the equipment is subjected to a high temperature test and then a low temperature test, a large amount of heat inside these items is released, causing the unit to undertake heat exchange in a low temperature state. The excessive burden of the equipment, resulting in the degradation or damage of the equipment performance.
The test item was placed improperly during the experiment, because the temperature change of the test box is achieved by the up and down circulation fan to achieve the stirring effect. If the air outlet is blocked, local cold and local heat will occur due to poor circulation, and the indoor refrigeration unit is still running, but the sensor cannot detect the correct temperature, resulting in equipment damage or damage.