WATER PUMP
FIG1 is a cross-sectional view illustrating a state in which a discharge port of a water pump according to an embodiment of the present disclosure is closed
Referring to FIG1, a water pump 1000 according to an embodiment of the present disclosure includes a body portion 1100, a cylinder portion 1200, and a linear motor 1300. The elastic member 1144 is provided between the impeller cover 1141 and the impeller 1120, and applies an elastic restoring force to the impeller cover 1141 towards the pressurizing space 1142a. Accordingly, the impeller cover 1141 that moved downward may return upward. In FIG1, the elastic member 1144 is shown as a coil-shaped spring, but this is only an embodiment of the present disclosure and a material and shape of the elastic member 1144 may vary. Referring to FIG1, a temperature sensor (not shown) that measures a temperature of the engine outputs a predetermined signal and transmits the signal to a motor control unit (not shown). Then, when the motor control unit applies a current to the linear motor 1300 based on the signal, the rotor 1330 moves the piston 1310 towards the pressurizing space 1142a via rotation.
cross-sectional view
1300
piston
1120
impeller
1100
body portion
1130
rotation shaft
1400
driving unit
1143
pressurizing member
1150
check valve
1000
water pump
1500
lock preventing member
1200
cylinder portion
['1. A water pump comprising: a body portion comprising a housing where an inlet port and a discharge port through which cooling water is introduced and discharged are provided, an impeller accommodated inside the housing and introducing or discharging the cooling water via rotation, a rotation shaft coupled to the impeller and rotating the impeller by receiving external driving power, and a cooling water flow rate control unit arranged above the impeller and operating to selectively open or close the discharge port; a cylinder portion provided above the cooling water flow rate control unit and formed therein a hydraulic space accommodating cooling water that applies pressure to the cooling water flow rate control unit; a piston located inside the hydraulic space and pressurizing the cooling water present inside the hydraulic space; a driving unit coupled to a side surface of the cylinder portion and moving the piston forward or backward; and a lock preventing member located at an inner surface of the cylinder portion that faces a front surface or a rear surface of the piston, and formed of an elastic material.', '5. The water pump of any one of claims 1 to 4, wherein the cooling water flow rate control unit comprises: an impeller cover arranged above the impeller, formed in a cylinder shape of which an end portion facing the impeller is opened, and operating such that a side surface selectively opens or closes the discharge port; a chamber cover arranged above the impeller cover, having a pressurizing space communicating with the hydraulic space therein, and applying pressure to the impeller cover through the cooling water introduced to the pressurizing space; and a pressurizing member arranged in a pressurizing space between the impeller cover and the chamber cover to seal a gap between the impeller cover and the chamber cover, and transmitting the pressure applied by the cooling water introduced to the pressurizing space to the impeller cover.', '7. The water pump of claim 5, wherein the body portion further comprises a check valve accommodated inside the housing to face a cooling water flow hole of which one end is connected to the cylinder portion and the other end is provided at the impeller cover, and preventing the cooling water from being introduced from the cylinder portion to the body portion by being closed when the piston moves in a direction towards the body portion.']