The main reason for the frequent opening and stopping of the constant temperature and humidity test chamber compressor

Under normal working conditions, the number of starts and stops of the constant temperature and humidity test chamber compressor should not be more than 6 times per hour; Failure to do so is considered a failure
.

The main reasons for the compressor to start and stop too frequently are: 1.
Poor heat dissipation of condenser; The poor heat dissipation effect of the condenser will reduce the cooling capacity of the constant temperature and humidity test chamber compressor, cause the compressor to overload the operation, resulting in an increase in the working current, causing the overcurrent protection relay to act and cut off the power supply, and the compressor stops running
.

When the protective relay bimetallic sheet feels the temperature drop to the reset temperature, the contacts are closed again and the compressor is started again, causing the compressor to start and stop
frequently.

The main reasons for the poor heat dissipation effect of the condenser are: there is dirt on the surface of the condenser; The ambient temperature of the test chamber is too high
.

Elimination method: regularly clean the dirt of the condenser of the constant temperature and humidity test chamber; Improve the heat dissipation conditions
of the constant temperature and humidity chamber.

2.
The supply voltage is too high or too low and unstable; Elimination method: Wait for the power supply voltage to return to normal and then turn on the power supply or install an AC voltage regulator to provide a stable 380V power supply
for the constant temperature and humidity test chamber.

3.
The door seal of the constant temperature and humidity test chamber is not strict, and the air leakage is serious; Exclusion method: overhaul and adjust the door seal or replace the door seal
.

4.
Overcurrent over-temperature protection relay disc-shaped bimetal sheet failure; Elimination method: constant temperature and humidity test chamber replaced with a new overcurrent overtemperature protection relay
.