-120 degree industrial electroplating cryogenic freezer service life influencing factors

In the pharmaceutical and chemical industry, -120 degree industrial electroplating cryogenic freezer is used more refrigeration equipment, often used in a variety of reactors for refrigeration reaction, in order to maintain the stable operation of the equipment, the precautions before and after the equipment start-up need to be paid attention
to.
1.
-120 degree industrial electroplating cryogenic freezer will be injected with refrigerant
during production and maintenance and repair.
How much refrigerant to charge has a great relationship
with the state of the refrigeration effect of the machine and the service life of the entire machine.
2.
Connect a pressure vacuum gauge and a pressure gauge to the suction and exhaust port pressure gauge
holders respectively.
Pressure vacuum gauge is a pressure gauge
that can read both the value of the pressure above the atmospheric pressure and the value of the vacuum degree.
3.
Put the refrigerant cylinder for maintenance on the scale and connect it with the liquid filling valve of the liquid pipe, this pipeline should be connected with soft copper pipe or other metal hose instead of rigid pipe, so as not to cause leakage or even break the pipe when the stress generated at the joint when the weighing pan moves
.
After the pipe is connected, slightly open the valve on the maintenance cylinder to detect leakage, the steps are: open the suction valve and discharge valve of the compressor, and the intake air
of the condenser.
4.
The suction valve and the liquid outlet valve and the solenoid valve of the liquid pipeline R then open the filling valve, slightly open the valve on the cylinder, so that the pressure of the whole system reaches the specified value (gauge pressure), and the nozzle of the halogen lamp suction hose is aligned with the joints of the system to detect leakage
.
5.
After leak detection, close the condenser outlet valve and write down the weight of the cylinder, turn on the condenser cooling water and intermittently disconnect the compressor to fill the system with refrigerant, and after filling the refrigerant, it should be visible
from the mirror at the bottom of the condenser.
At this time, the filling valve can be closed and the condenser outlet valve
can be opened.