Refrigerant is a very important additive when the fruit and vegetable freeze dryer is running, but the following matters must be paid attention to when using it:
①The quality of the refrigerant should be determined before the refrigerant. The refrigerant can be charged only after the quality is no problem.
The low-quality refrigerant is very destructive to the compressor and the refrigeration system, which will affect the operation of the refrigeration system at light level, and damage the compressor at worst.
②If the refrigerant is azeotropic, it is not necessary to turn the cylinder upside down and lay flat, and directly charge it into the system; if it is a non-azeotropic refrigerant, consider turning the cylinder upside down and laying flat (that is, the outlet is liquid), but the refrigerant The tank valve i] should be closed as small as possible to avoid the liquid hammer phenomenon of the compressor.
③ Observe the pressure of each pressure gauge, the number of air bubbles on the sight glass and the amount of defrost of the compressor to determine the refrigerant charge.
