Novel electromagnetic pump

Abstract

A novel electromagnetic pump comprises a coil assembly, a piston assembly, a water inlet pipe, a positioning sleeve, a one-way valve sealing element, a water outlet, a water outlet one-way valve, a front spring and a rear spring. The novel electromagnetic pump is characterized in that a long and thin piston rod of the piston assembly is solid, and the one-way valve sealing element is made of an elastic material such as rubber and polyurethane and structurally comprises a body, an axial sealing portion, a one-way sealing portion, a water inlet pressure portion and an inner cavity. The novel electromagnetic pump has the advantages that a one-way plug and a one-way valve spring which are required when an existing electromagnetic valve is manufactured in the prior art are omitted, the one-way valve sealing element replaces an original axial sealing element, and an axial sealing function and functions of a water inlet one-way valve are integrated; the solid piston rod is utilized, small holes are not required to be perforated in the middle of the long and thin piston rod, accordingly, the structure of the electromagnetic pump is greatly improved, and manufacture and assembly processes are simplified and facilitated; running noise of the integral electromagnetic pump further can be reduced, and the consistency of the working performance of the electromagnetic pump further can be improved.

Description

technical field [0001] The invention relates to an electromagnetic pump using water as a fluid, in particular to an electromagnetic pump used in the field of small household appliances. Background technique [0002] Electromagnetic pumps are widely used in the field of small household appliances, especially in the water supply systems of coffee machines, electric irons and water dispensers. Traditional electromagnetic pumps use a hollow piston rod, and then use a plug and a spring or extension spring at the front end of the piston rod to form a water inlet check valve. However, the piston rod is a slender piece and is made of soft magnetic material. It is very difficult to drill a slender hole in the center, which consumes a lot of processing time; the one-way valve formed by the plug at the front end of the piston rod and the spring has a large range of motion, which is easy to cause noise. The plug seal of the directional valve is not very reliable, so that the working pr...

AI Technical Summary

Problems solved by technology

Traditional electromagnetic pumps use a hollow piston rod, and then use a plug and a spring or extension spring at the front end of the piston rod to form a water inlet check valve. However, the piston rod is a slender piece and is made of soft magnetic material. It is very difficult to drill a slender hole in the center, which consumes a lot of processing time; the one-way valve formed by the plug at the front end of the piston rod and the spring has a large range of motion, which is easy to cause noise. The plug seal of the directional valve is not very reliable, so that the working pressure of the whole electromagnetic pump can be reduced; some one-way valves with a tension spring structure are prone to wear and tear due to the tension spring in the small hole inside the piston rod and its frequent up and down movements. , the processing of the extension spring is also difficult and complicated, and the assembly is also very troublesome

There are also some electromagnetic pumps that use injection molding to manufacture piston rods, but because the piston rods are thin and long, there must be holes in the middle that can provide sufficient flow of water to pass through, so that the wall thickness of the piston rods is extremely thin, which affects the injection molding process and material selection of plastics. It brings great difficulties and also makes the scrap rate during manufacturing remain high

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