Patent ID: 11971023
Assignee: SHENZHEN CNHT LIMITED COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A miniature electromagnetic water pump, comprising a pump body, a magnetic core plunger device installed in the pump body, an electromagnetic device sleeved outside the pump body, and a throttle valve device connected with the magnetic core plunger device, wherein the magnetic core plunger device is used to pump liquid outside the pump body to the throttle valve device, the electromagnetic device generates a pulsed electromagnetic field to push the magnetic core plunger device to reciprocate in the pump body;
wherein the throttle valve device comprises a throttle valve seat, an containing groove provided on the throttle valve seat, and a throttle valve cover arranged in the containing groove, the throttle valve seat is provided with a liquid inlet hole for liquid to flow into the containing groove, the cross section of the throttle valve cover is in a concave shape, a rubber sheet is clamped in the throttle valve cover, a flow restricting ring is circumferentially provided in the containing groove close to an opening edge of the liquid inlet hole, and wherein the flow restricting ring, the containing groove and the rubber sheet define a first flow restricting cavity, a second flow restricting cavity is enclosed by a side of the rubber sheet away from the liquid inlet hole and an inner wall of the throttle valve cover, and a buffer channel is enclosed by an inner side wall of the containing groove and an outer side wall of the throttle valve cover, the first flow restricting cavity and the second flow restricting cavity are respectively communicated with a liquid inlet and a liquid outlet of the buffer channel, the throttle valve cover is provided with a liquid discharging opening for the liquid in the second flow restricting cavity to be discharged from the throttle valve device.