CN219319490U - Flow sensor - Google Patents

Abstract

The utility model relates to the field of sensors, in particular to a flow sensor. The flow sensor comprises a shell, a liquid inlet pipe and a liquid outlet pipe are communicated with the shell, a Hall element is arranged on the shell, an impeller assembly is rotationally arranged in the shell, the impeller assembly comprises a mounting seat, an impeller and a magnet, the impeller is integrally formed at the bottom of the mounting seat, and the magnet is a plurality of magnets and is symmetrically integrally formed in the mounting seat. The flow sensor provided by the utility model has the advantages that the impeller assembly is integrally injection molded, the fluid medium is not contacted with the magnet, and the pollution of the magnet to the medium is avoided.

Description

Flow sensor

Technical Field

The utility model relates to the field of sensors, in particular to a flow sensor.

Background

At present, household direct drinking appliances, such as: coffee machine, drinking machine, water purifier, etc.; the accurate measurement of the water yield of one use by using a flow sensor is a common application phenomenon, wherein the precision, the structural size and the pollution of materials to the use environment of the sensor are more and more focused on by all parties. The existing flow sensor generally mainly comprises a base, an upper cover, an impeller, a magnet, a Hall element and the like. The magnet is driven to rotate through the rotation of the impeller, and the Hall element fixed on the upper cover detects the pulse signals, so that the flow is converted into the number of output pulse signals, and the digital monitoring and control of the flow are realized.

For example, patent document CN2798053Y discloses a water flow sensing device for a water heater, which comprises a blade driven by water flow and a magnetic rotor arranged on the blade and linked with the blade, wherein a magnetic reed switch is arranged at the outer side of the device body corresponding to the magnetic rotor, a magnet is arranged at the other side of the magnetic reed switch corresponding to the magnetic rotor, and the magnetic force generated by the magnet can enable the magnetic reed switch to be capable of disabling the magnetic field change generated by the magnetic rotor without being tightly attached to the magnetic rotor, so that the design and the installation configuration of the device are facilitated.

For another example, patent document CN2708257Y discloses a flow sensor in which a rotor is rotated by diverting a part of a fluid passing through a sensor housing passage, and a flow rate is detected by the number of revolutions of the rotor, so that even if the flow sensor is mounted in the middle of a fluid line, a load is hardly generated on the line, and flow rate data can be accurately detected by a hall sensor.

However, in the above-mentioned technique, the magnet is movably mounted on the impeller assembly, and is easily contacted with the fluid, thereby causing magnetic pollution.

Therefore, a flow sensor is provided to solve the technical problems.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to: the flow sensor is formed by integrally injection molding the impeller assembly, and the fluid medium and the magnet are in non-contact, so that the pollution of the magnet to the medium is avoided.

The utility model adopts the technical scheme that: the utility model provides a flow sensor, includes the casing, the intercommunication has feed liquor pipe and drain pipe on the casing, be equipped with hall element on the casing, impeller subassembly is installed to the casing rotation, impeller subassembly includes mount pad, impeller and magnet, impeller integrated into one piece is in the bottom of mount pad, the magnet is located in the mount pad or in the impeller.

As a further improvement of the technical scheme, the plurality of magnets are symmetrically and integrally formed in the mounting seat. Because the impeller assembly is integrally formed, the magnet is positioned in the mounting seat, and the magnet can be effectively prevented from being contacted with the fluid medium to pollute the fluid medium.

As a further improvement of the technical scheme, the shell is provided with an upper cover, a rotating shaft is fixedly arranged between the upper cover and the shell, and the impeller assembly is rotatably arranged on the rotating shaft.

As a further improvement of the technical scheme, the upper cover is provided with an annular groove, a sealing ring is embedded in the annular groove, and the upper cover is in sealing connection with the shell by using the sealing ring.

As a further improvement of the technical scheme, the Hall element is fixedly arranged at the bottom of the upper cover through pouring sealant. Can effectively prevent water and dust.

As a further improvement of the technical scheme, one side of the shell is movably provided with a U-shaped buckle, the upper cover is provided with a plug-in groove, and the U-shaped buckle is movably connected with the plug-in groove. The assembly and disassembly are convenient, meanwhile, the impeller is ensured to have no obvious shaking and falling after rotating at high speed for a long time, and high reliability and stability are realized.

As a further improvement of the technical scheme, the nozzle is inserted into the liquid inlet pipe, the inner wall of the nozzle is of a reducing step structure, so that the fluid can be effectively pressurized and accelerated, and the accurate detection can be realized when the small flow is ensured.

The beneficial effects of the utility model are as follows: impeller subassembly integrated into one piece, the magnet is located the mount pad to can avoid the fluid and the magnet contact of being detected, effectively prevent magnetic pollution.

Drawings

The utility model is further illustrated by the following description and examples of the embodiments in conjunction with the accompanying drawings.

FIG. 1 is a schematic view of a preferred embodiment of the present utility model;

FIG. 2 is a perspective exploded view of the device shown in FIG. 1;

FIG. 3 is a schematic cross-sectional structural view of an impeller assembly;

fig. 4 is a schematic cross-sectional view of the liquid inlet pipe and the nozzle.

In the figure: 1. a housing; 11. a liquid inlet pipe; 111. a nozzle; 12. a liquid outlet pipe; 2. an upper cover; 21. an annular groove; 22. a seal ring; 3. a Hall element; 4. an impeller assembly; 41. a mounting base; 42. an impeller; 43. a magnet; 5. a rotating shaft; 6. u-shaped buckle.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1 to 3, a flow sensor includes a housing 1, a liquid inlet pipe 11 and a liquid outlet pipe 12 are connected to the housing 1, a hall element 3 is disposed on the housing 1, an impeller assembly 4 is rotatably mounted on the housing 1, the impeller assembly 4 includes a mounting seat 41, an impeller 42 and a magnet 43, in order to prevent magnetic pollution, the impeller 42 is integrally formed at the bottom of the mounting seat 41, and the magnet 43 is a plurality of magnets and is symmetrically integrally formed in the mounting seat 41. When the intelligent flow meter is used, fluid enters through the liquid inlet pipe 11 and flows out from the liquid outlet pipe 12, so that the impeller 42 is driven to rotate, the impeller assembly 4 is driven to integrally rotate by the impeller 42, the Hall principle that the magnet rotates fast and slow is utilized, the Hall element outputs pulse signals with different frequencies under the action of an external circuit, and accordingly the flow is converted into the quantity of the output pulse signals, and digital monitoring and control of the flow are realized.

In order to ensure that the impeller assembly 4 rotates stably, the shell 1 is provided with an upper cover 2, a rotating shaft 5 is fixedly arranged between the upper cover 2 and the shell 1, and the impeller assembly 4 is rotatably arranged on the rotating shaft 5.

An annular groove 21 is formed in the upper cover 2, a sealing ring 22 is embedded in the annular groove 21, and the upper cover 2 is in sealing connection with the shell 1 through the sealing ring 22.

The Hall element 3 is fixedly arranged at the bottom of the upper cover 2 through pouring sealant, after the upper cover 2 is connected with the shell 1, the Hall element 3 is positioned in the shell 1, waterproof and dustproof can be realized by utilizing the pouring sealant, and the wiring part of the Hall element 3 penetrates through the upper cover 2, so that wiring is facilitated.

One side movable mounting of casing 1 has U-shaped to detain 6, set up the grafting groove on the upper cover 2, after upper cover 2 lid closes on casing 1, peg graft U-shaped knot 6 on casing 1, U-shaped knot 6 imbeds the grafting inslot, can realize the fixed of upper cover 2 to convenient dismantlement.

Referring to fig. 4, the nozzle 111 is inserted into the liquid inlet pipe 11, and the inner wall of the nozzle 111 has a diameter-variable step structure, so that pressurization can be realized, and the nozzles 111 with different lengths and inner diameters can be changed according to different flow rates and pressures, different materials and weights of the impeller assembly 4, so that the same accumulated pulse signals can be output by inputting the same accumulated flow rates under different medium pressures, and high-precision operation is ensured.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (8)

1. The utility model provides a flow sensor, includes casing (1), the intercommunication has feed liquor pipe (11) and drain pipe (12) on casing (1), be equipped with hall element (3) on casing (1), impeller subassembly (4) are installed in casing (1) rotation, its characterized in that:

the impeller assembly (4) comprises a mounting seat (41), an impeller (42) and a magnet (43), wherein the impeller (42) is fixed on the mounting seat (41), and the magnet (43) is arranged in the mounting seat (41) or the impeller (42).

2. A flow sensor as claimed in claim 1, wherein:

the impeller (42) is integrally formed at the bottom of the mounting seat (41), and the magnet (43) is integrally formed in the mounting seat (41).

3. A flow sensor as claimed in claim 1, wherein:

the magnets (43) are arranged symmetrically in a plurality.

4. A flow sensor as claimed in claim 1, wherein:

the novel impeller is characterized in that an upper cover (2) is arranged on the shell (1), a rotating shaft (5) is fixedly arranged between the upper cover (2) and the shell (1), and the impeller assembly (4) is rotatably arranged on the rotating shaft (5).

5. A flow sensor as claimed in claim 4, wherein:

an annular groove (21) is formed in the upper cover (2), a sealing ring (22) is embedded in the annular groove (21), and the upper cover (2) is connected with the shell (1) in a sealing mode through the sealing ring (22).

6. A flow sensor as claimed in claim 5, wherein:

the Hall element (3) is fixedly arranged at the bottom of the upper cover (2) through pouring sealant.

7. A flow sensor as claimed in claim 4, wherein:

one side of the shell (1) is movably inserted with a U-shaped buckle (6), the upper cover (2) is provided with an inserting groove, and the U-shaped buckle (6) is movably connected with the inserting groove.

8. A flow sensor according to any one of claims 1-5, wherein:

a nozzle (111) is inserted in the liquid inlet pipe (11), and the inner wall of the nozzle (111) is of a reducing step structure.

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