CN216012345U - Water flow sensor - Google Patents

Abstract

A water flow sensor comprises a main body, an impeller shaft, a magnet, an impeller cavity cover, an outer cover and a Hall sensor, wherein the main body comprises a water inlet interface, an impeller cavity and a water outlet interface, and a cavity shaft seat is arranged on a bottom plate of the impeller cavity; the impeller cavity cover comprises a cover shaft seat and a Hall sensor cavity with an upper opening, the impeller cavity cover is buckled with the impeller cavity, and the outer cover is buckled with the impeller cavity cover; the impeller shaft and the impeller are made of plastic materials, the impeller shaft and the impeller further comprise magnet seats, and magnets are embedded in the magnet seats and are uniformly distributed in a circular shape; the magnet seat is arranged on an impeller shaft at the upper part of the impeller, and the impeller shaft, the impeller and the magnet seat are integrally formed; the Hall sensor cavity is opposite to the magnet seat. The impeller shaft, the impeller and the magnet seat are made of plastic materials and are formed in one step, the manufacturing process is simple, the work efficiency is high, and the cost is reduced; the impeller shaft and the impeller are made of the same material, and the service life is long.

Description

Water flow sensor

Technical Field

The present invention relates to a water flow sensor for a water heater.

Background

In the prior art, a water flow sensor comprises a main body, an impeller shaft made of a metal material, a magnet, an impeller cavity cover, an outer cover and a Hall sensor, wherein the main body comprises a water inlet interface, an impeller cavity and a water outlet interface, and a cavity shaft seat is arranged on a bottom plate of the impeller cavity; the impeller cavity cover comprises a cover shaft seat and a Hall sensor cavity with an upper opening, the impeller cavity cover is buckled with the impeller cavity, and the outer cover is buckled with the impeller cavity cover. There are problems in that: the impeller shaft and the impeller are made of different materials, have different expansion coefficients, are complex in manufacturing process, high in cost and short in service life.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the water flow sensor has the characteristics of convenience in manufacturing, high working efficiency, low cost and long service life.

The utility model is realized by the following steps: a water flow sensor comprises a main body, an impeller shaft, a magnet, an impeller cavity cover, an outer cover and a Hall sensor, wherein the main body comprises a water inlet interface, an impeller cavity and a water outlet interface, and a cavity shaft seat is arranged on a bottom plate of the impeller cavity; the impeller cavity cover comprises a cover shaft seat and a Hall sensor cavity with an upper opening, the impeller cavity cover is buckled with the impeller cavity, and the outer cover is buckled with the impeller cavity cover; it is characterized in that: the impeller shaft and the impeller are made of plastic materials, the impeller shaft and the impeller further comprise magnet seats, and magnets are embedded in the magnet seats and are uniformly distributed in a circular shape;

the magnet seat is arranged on an impeller shaft at the upper part of the impeller, and the impeller shaft, the impeller and the magnet seat are integrally formed; the Hall sensor cavity is opposite to the magnet seat.

Preferably: an inner port is arranged on an upper opening of the impeller cavity;

the impeller cavity cover is provided with an external interface and a step, and further comprises a sealing ring;

the sealing ring is arranged in the inner connector, the outer connector is inserted into the inner connector, the sealing ring is pressed in a step mode, and the outer connector at the lower portion of the step is inserted into the impeller cavity.

Preferably: the impeller cavity cover is provided with a data wire slot communicated with the Hall sensor cavity;

the outer cover covers the data wire slot.

Preferably: at least two pins are arranged on the impeller cavity cover;

the outer cover is provided with a cavity with a lower opening, a top plate of the cavity is provided with a pin seat, and the pin seat is provided with a pin hole;

the pin is inserted into the pin hole.

According to the water flow sensor, the impeller shaft, the impeller and the magnet seat are made of plastic materials and are formed in one step, the manufacturing process is simple, the work efficiency is high, and the cost is reduced; the impeller shaft and the impeller are made of the same material, and the service life is long.

Drawings

Fig. 1 is a cross-sectional view of the present invention.

Fig. 2 is a view a-a of fig. 1.

Fig. 3 is one of the exploded perspective views of the present invention.

Fig. 4 is a second exploded perspective view of the present invention.

Fig. 5 is a perspective view of the present invention.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1, a water flow sensor comprises a main body 1, an impeller 2, an impeller shaft 3, a magnet (not shown in the figure), an impeller cavity cover 4, an outer cover 5 and a hall sensor (not shown in the figure), wherein the main body 1 comprises a water inlet interface 11, an impeller cavity 12 and a water outlet interface 13, and a cavity shaft seat 121 is arranged on a bottom plate of the impeller cavity 12; the impeller cavity cover 4 comprises a cover shaft seat 41 and a Hall sensor cavity 42 with an upper opening, the impeller cavity cover 4 is buckled with the impeller cavity 12, and the outer cover 5 is buckled with the impeller cavity cover 4;

the impeller shaft 3 and the impeller 2 are made of plastic materials, and the impeller further comprises a magnet seat 7, and magnets are embedded in the magnet seat 7 and are uniformly distributed in a circular shape;

the magnet seat 7 is arranged on the impeller shaft 3 at the upper part of the impeller 2, and the impeller shaft 3, the impeller 2 and the magnet seat 7 are integrally formed; the hall sensor cavity 42 is opposed to the magnet holder 7.

An inner interface 122 is arranged on the upper opening of the impeller cavity 12;

the impeller cavity cover 4 is provided with an external interface 43 and a step 431 and also comprises a sealing ring 8;

the seal ring 8 is arranged in the inner joint 122, the outer joint 43 is inserted into the inner joint 122, the step 431 compresses the seal ring 8, and the outer joint 43 at the lower part of the step 431 is inserted into the impeller cavity 12.

The impeller cavity cover 4 is provided with a data wire slot 44 communicated with the Hall sensor cavity;

the outer cover 5 covers the data line groove 41 to fix the data line in the data line groove 44.

Two pins 45 are arranged on the impeller cavity cover 4;

a cavity 51 with a lower opening is arranged on the outer cover 5, a pin seat 52 is arranged on a top plate of the cavity 51, and a pin hole is arranged on the pin seat 52; a wiring board may be disposed within the cavity 51.

The pin 45 is inserted into the pin hole.

What has been described above is merely a preferred embodiment of the present invention. It should be noted that a person skilled in the art could make several modifications and variations without departing from the principle of the present invention, which should also be regarded as the protection scope of the present invention.

Claims (4)

1. A water flow sensor comprises a main body, an impeller shaft, a magnet, an impeller cavity cover, an outer cover and a Hall sensor, wherein the main body comprises a water inlet interface, an impeller cavity and a water outlet interface, and a cavity shaft seat is arranged on a bottom plate of the impeller cavity; the impeller cavity cover comprises a cover shaft seat and a Hall sensor cavity with an upper opening, the impeller cavity cover is buckled with the impeller cavity, and the outer cover is buckled with the impeller cavity cover; the method is characterized in that: the impeller shaft and the impeller are made of plastic materials, the impeller shaft and the impeller further comprise magnet seats, and magnets are embedded in the magnet seats and are uniformly distributed in a circular shape;

the magnet seat is arranged on an impeller shaft at the upper part of the impeller, and the impeller shaft, the impeller and the magnet seat are integrally formed; the Hall sensor cavity is opposite to the magnet seat.

2. A water flow sensor according to claim 1, wherein: an inner port is arranged on an upper opening of the impeller cavity;

the impeller cavity cover is provided with an external interface and a step, and further comprises a sealing ring;

the sealing ring is arranged in the inner connector, the outer connector is inserted into the inner connector, the sealing ring is pressed in a step mode, and the outer connector at the lower portion of the step is inserted into the impeller cavity.

3. A water flow sensor according to claim 1, wherein: the impeller cavity cover is provided with a data wire slot communicated with the Hall sensor cavity;

the outer cover covers the data wire slot.

4. A water flow sensor according to claim 1, 2 or 3, wherein: at least two pins are arranged on the impeller cavity cover;

the outer cover is provided with a cavity with a lower opening, a top plate of the cavity is provided with a pin seat, and the pin seat is provided with a pin hole;

the pin is inserted into the pin hole.

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