During the operation of the air conditioner

when the outlet of the air conditioner condenser is blocked

if there is a leak point in the front section of the compressor and the air is taken in

the mixture of R32 refrigerant and air will burn or explode when the temperature and pressure reach certain conditions. In this paper

in the view of the safe operation of the R32 compressor

when the air conditioner is running

close the condenser outlet. The combination of experimental and simulation studies is used to investigate the risk of flammability in the R32 compressor when the air intrusion is 10%

40%

or 60% of the compressor intake. The analysis results show that the air intrusion amount is 10% of the compressor suction

the impact on the compressor discharge pressure and exhaust temperature is small

and the flammability risk is low; When the amount of air intrusion is greater than 10% of the intake of the compressor

as the amount of air intrusion increases

the discharge pressure increases and when the air intrusion amount is 60%

the exhaust pressure exceeds 17% of the rated outlet pressure of the compressor. At this time

the temperature of the lubricating oil in the oil pool exceeds 100 ℃

generating The carbon deposit increases the risk of combustion and explosion; the coil winding temperature of the motor exceeds the temperature limit of the insulating material by 120 ℃

accelerating the aging of the insulating material to cause a short circuit to generate sparks

and increasing the flammability risk in the R32 compressor.