ELECTRIC PUMP AND CLEANING DEVICE FOR ON-VEHICLE OPTICAL SENSOR

摘要

An electric pump includes a cylinder, a piston, a motor, and a discharge valve. The cylinder includes a valve port and a discharge port, which is in communication with the valve port. The discharge valve opens and closes the valve port. When the piston is moved forth to narrow a void in the cylinder, air is compressed in the cylinder. The discharge valve opens when operated by the piston that moves forth. The discharge valve opens and discharges compressed air from the valve port so that fluid including air is discharged from the discharge port.

主权项

1. An electric pump comprising:
a tubular cylinder including a valve port and a discharge port, which is in communication with the valve port, wherein inner and outer sides of the cylinder are in communication through the valve port; a piston that is movable back and forth in the cylinder; a motor that drives and moves the piston back and forth; and a discharge valve that functions to open and close the valve port, wherein when the piston is moved forth to narrow a void in the cylinder, air is compressed in the cylinder, the discharge valve is configured to open when operated by the piston that moves forth, and the discharge valve opens and discharges compressed air from the valve port so that fluid including air is discharged from the discharge port.