Automatic feeding system of rotary evaporator

[0010] see figure 1 , figure 2 , an automatic feeding system for a rotary evaporator, this system includes a circuit breaker 2, a switching power supply 3, a first solenoid valve 4, a first liquid level switch 5, a second liquid level switch 6, a first normally open contact 7, a second A relay coil 8 , a second solenoid valve 9 , a third liquid level switch 10 , a fourth liquid level switch 11 , a second normally open contact 12 , a second relay coil 13 , a rotary switch 14 , and a normally closed contact 15 .

[0011] The circuit breaker 2 is connected to the AC power supply 1, and the circuit breaker 2 is also connected to the switching power supply 3. The first solenoid valve 4, the first liquid level switch 5, the first normally open contact 7, the first relay coil 8 and the switching power supply 3 The first circuit is formed in series, and the second liquid level switch 6 is connected in parallel with the first normally open contact 7 and the first relay coil 8 .

[0012