Patent ID: 9188038
Filing Date: 2015-11-17
Classification: F01N,Y02A,Y02T,Y10T

Abstract:
1. A pumping device, comprising: a suction tube; a flowmeter disposed on the suction tube; a pump including a return channel and a delivery channel, and connecting the return channel and the delivery channel to the suction tube; a return tube connected to the return channel; a solenoid valve disposed between the suction tube and the delivery channel, wherein the return channel remains constantly open; and a control unit identifying a fluid by a flow velocity difference of the flowmeter, wherein the solenoid valve closes the delivery channel when the fluid flows in, the flowmeter measures a flow rate of the fluid sucked through the suction tube, and the fluid is returned to the return tube via the return channel, and the control unit opens the solenoid valve and opens the delivery channel to supply the fluid also to the delivery channel when it is identified that the fluid is an intended fluid; wherein the pump further comprises a first fan provided in the return channel and a second fan provided in the delivery channel, the first fan is coaxially coupled to the second fan, and the first fan is configured to operate simultaneously with the second fan.