Common problems of permanent magnet variable frequency air compressor intake valve
The intake valve of the permanent magnet variable frequency air compressor can be said to be an intake control combination valve, which has the functions of intake control, loading and unloading control, capacity adjustment control, discharge, prevention of unloading or fuel injection during shutdown, and its operation rules can be summarized as : Power on to load, jump to stop to unload. The air compressor intake valve generally has two structures: a rotating disc and a reciprocating valve plate.
There are two control methods for the intake valve: one is the switch method, when the pressure of the gas storage tank reaches the upper limit preset value, the intake port is closed; when the pressure drops to the lower limit preset value, the intake port is opened again.
The other is the capacity adjustment method. When the air storage tank reaches a certain pressure, the air inlet is slightly closed under the control of the proportional valve. When the pressure of the air storage tank is further expanded, the air inlet is further reduced; when the air storage tank When the pressure drops slightly, the air inlet will increase to keep the pressure stable within a certain range; when the pressure does not reach the capacity adjustment pressure, the air inlet valve disc will be fully opened and the air inlet will be opened. The intake valve of the permanent magnet variable frequency air compressor is generally a normally closed valve, which prevents a lot of gas from entering the machine head when the air compressor is started, and increases the starting current of the motor. There is an intake valve on the intake valve, which is used to avoid high vacuum in the machine head when the equipment is running and fully loaded, which will affect the atomization of grease. Frequently asked questions about permanent magnet variable frequency air compressors:
(1) The main reasons why the intake valve of the permanent magnet variable frequency air compressor is not loaded are: the solenoid valve is not energized; the solenoid valve is damaged; The fat change causes the friction between the piston seal ring of the intake valve and the cylinder to increase and cannot be calibrated; the volume control valve controls the intake valve to close.
Cleaning method: Check the equipment circuit to ensure that the solenoid valve is normal; replace the solenoid valve coil or the entire solenoid valve body; Change the high-quality grease; adjust the volume control valve (module) of the intake valve, it is not recommended for laymen to do it by themselves.
(2) Non-unloading The main reasons for the non-unloading of the intake valve are: the solenoid valve is not powered off; the solenoid valve is damaged; the small hole in the solenoid valve is blocked; the retention hole in the intake valve is blocked; the discharge rate is too fast.
Cleaning method: check the circuit, repair the solenoid valve to be normal; replace the solenoid valve coil or the entire solenoid valve body; disassemble the solenoid valve to eliminate internal impurities; disassemble the intake valve to eliminate impurities in the trapped hole; adjust the discharge rate, increase the size of the air pipe or Add a bend.
(3) Intake valve oil pump The main reasons for the intake valve oil pump are: poor oil and gas separator; blockage of pump oil throttle valve; poor air filtration effect, and poor sealing caused by adhesion of impurities on the protruding surface of the intake valve core; The air compressor works in a harsh environment, and the matching pair of the intake valve piston and the torsion spring seat is damaged.
Cleaning method: check the oil and gas separator, and replace the new oil separation core; remove the pump oil throttle valve, the internal impurities of the throttle valve; check the air filter, and replace the new air filter, the intake valve pipeline is clean and tidy; reduce the maintenance cycle And suggest customers to improve the air compressor office environment.
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