CN110987104A

CN110987104A - Flow meter and cooking utensil

Info

Publication number: CN110987104A
Application number: CN201911347107.2A
Authority: CN
Inventors: 李佳宏; 胡玉新; 李锦彬; 陈崇得; 郑芝云
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-04-10

Abstract

The invention discloses a flowmeter and a cooking appliance, wherein the flowmeter comprises: a shell, one end of which is provided with a water inlet and the other end of which is provided with a water outlet; the first rotor and the second rotor are arranged in a preset mounting cavity of the shell and are rotatably connected with the shell through rotating shafts; the first rotor and the second rotor are meshed with each other through a gear structure arranged on the peripheral edge; a magnetic member disposed on the first rotor or the second rotor; and the Hall element is matched with the magnetic piece to work. With this arrangement, when water is supplied, a rotational torque can be generated with respect to the first rotor and the second rotor, and the first rotor and the second rotor can be urged to rotate. Because the flowmeter works by depending on the pressure of water, the gap between the rotor and the shell can be set to be very small, thereby reducing the water discharged without pushing the rotor to rotate, reducing the measurement error and improving the accuracy of the flowmeter.

Description

Flow meter and cooking utensil

Technical Field

The invention relates to the field of household appliances, in particular to a flowmeter and a cooking appliance.

Background

With the gradual improvement of the living standard of people, a plurality of intelligent household appliances are gradually favored by people. Meanwhile, as the user demands for functionality and product effects of home appliances more and more, the internal and external structures of many home appliances are greatly changed.

In the prior art, a full-automatic intelligent electric cooker usually adopts a full-automatic water inlet mode. The function of full-automatic water inlet is that a flow meter arranged in the electric cooker controls the water inlet precision and further controls the water inlet quantity. However, when the flowmeter applied to the field of household appliances works, the water flow impacts the rotor of the flowmeter, and then the rotor is pushed to rotate. The rotor of such a flowmeter is provided with slits around its periphery for the discharge of the water flow. When the overlarge gap is arranged, the drainage speed is too high, part of water reaches an outlet through the gap of the flowmeter without playing a role of pushing the rotor to rotate, and is naturally not counted, so that the measurement error is caused, and the precision of the flowmeter is poor.

Although the current elliptic gear flowmeter can improve the detection precision of the flowmeter, the elliptic gear flowmeter in the prior art is usually made of stainless steel, so that the elliptic gear flowmeter is large in volume and cannot be applied to the field of cooking appliances, namely the field of electric cookers. In addition, the elliptic gear in the elliptic gear flowmeter in the prior art has larger volume and is made of stainless steel, so that the elliptic gear is very heavy, and small-flow water introduced into a cooking appliance cannot push the elliptic gear to rotate. And, since it is too heavy, it is generally connected to a rotating shaft provided at a housing through a bearing. However, when the rotating shaft and the housing are assembled, a gap is easily formed, and water flows through the gap, which causes a certain error in accuracy.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to overcome the problem that the oval gear flow meter in the prior art cannot be applied to the cooking appliance, so as to provide a flow meter and a cooking appliance.

To achieve the above object, the present invention provides a flow meter and a cooking appliance, the flow meter including: a shell, one end of which is provided with a water inlet and the other end of which is provided with a water outlet; the first rotor and the second rotor are arranged in a preset mounting cavity of the shell and are rotatably connected with the shell through rotating shafts; the first rotor and the second rotor are meshed with each other through a gear structure arranged on the peripheral edge; a magnetic member disposed on the first rotor or the second rotor; and the Hall element is matched with the magnetic piece to work.

Optionally, the housing comprises a first housing and a second housing; the first shell and the second shell are buckled with each other.

Optionally, a sealing member is disposed between the first housing and the second housing, and the first housing and the second housing are provided with an accommodating cavity adapted to accommodate the sealing member.

Optionally, the inner diameter of the receiving cavity is smaller than the outer diameter of the seal member.

Optionally, the first rotor and the second rotor are identically arranged elliptical rotors; the first rotor and the second rotor are meshed with each other through a gear structure arranged on the peripheral edge.

Optionally, a rotating hole which rotates in cooperation with the rotating shaft is formed in the center of the first rotor and the center of the second rotor.

Optionally, the magnetic member includes a first magnetic member and a second magnetic member, and the first magnetic member and the second magnetic member are respectively disposed on two sides of the rotary hole.

Optionally, the magnetism of the side where the first magnetic member and the second magnetic member are close to each other is opposite.

Optionally, the rotating shaft and the housing are integrally formed.

The embodiment of the invention also provides a cooking appliance, which comprises the flowmeter.

Compared with the prior art, the invention has the beneficial effects that:

1. the present invention provides a flow meter comprising: a shell, one end of which is provided with a water inlet and the other end of which is provided with a water outlet; the first rotor and the second rotor are arranged in a preset mounting cavity of the shell and are rotatably connected with the shell through rotating shafts; the first rotor and the second rotor are meshed with each other through a gear structure arranged on the peripheral edge; the first rotor and the second rotor are made of plastic materials; a magnetic member disposed on the first rotor or the second rotor; and the Hall element is matched with the magnetic piece to work. So set up, can reduce rotor gear self weight by a wide margin for the water of the small discharge that lets in among the cooking utensil can promote rotor gear. Thereby can be when leading to water, because the pressure of inlet water is greater than the pressure of delivery port, through acting on pressure on the rotor gear, can form turning moment, promote first rotor and second rotor and rotate, be applied to the flowmeter in the cooking utensil, improved the accuracy of flowmeter.

2. The invention is characterized in that the first rotor and the second rotor are arranged into the same elliptical rotor, and the first rotor and the second rotor are meshed with each other through a gear structure arranged on the peripheral edge. With this arrangement, the elliptical rotor can have fewer turns when metering an equal volume of water because it is divided into a major axis and a minor axis as compared to a circular rotor. Because the water has resistance, the elliptical rotor and the circular rotor have the same maximum rotating speed, and the elliptical rotor can measure water with larger flow at the same rotating speed. And because when the rotor rotates, the noise increases along with the increase of rotational speed, under the equal flow, the rotational speed of oval rotor is lower to reduce the noise of flowmeter at the during operation, promoted user's use and experienced.

3. According to the invention, the two axial end faces of the first rotor and the second rotor are attached to the shell, so that the gap between the first rotor and the second rotor can be reduced, the water discharged without pushing the rotors to rotate is reduced, the measurement error is reduced, and the accuracy of the flowmeter is improved. The long shafts of the first rotor and the second rotor are tangent to the shell, so that gaps between the first rotor and the shell and gaps between the second rotor and the shell can be reduced, when the first rotor and the second rotor rotate, water in the shell can be discharged after completely acting on the rotors, the water discharged without pushing the rotors to rotate is reduced, measurement errors are reduced, and the accuracy of the flowmeter is improved. And the unique degree of freedom of the rotor can be ensured when the rotor rotates around the rotating shaft, and the reliability of the structure is enhanced.

4. The magnetic part is set to be the first magnetic part and the second magnetic part which are respectively arranged at two sides of the rotating shaft; the magnetism of the side where the first magnetic part and the second magnetic part are close to each other is opposite. So set up, can produce the signal of telecommunication at first rotor and second rotor when the rotation hall element, the controller can discern the signal of telecommunication then accurately counts to improve flowmeter's accuracy.

5. According to the invention, the sealing element is arranged between the first shell and the second shell, so that the sealing property between the first shell and the second shell can be improved, and the water is prevented from leaking outwards after entering the flowmeter, thereby reducing the measurement error and improving the accuracy of the flowmeter.

6. According to the invention, the inner diameter of the accommodating cavity is set to be smaller than the outer diameter of the sealing element, so that the accommodating cavity and the sealing element are in interference fit in the assembling process, the sealing property between the first shell and the second shell is further improved, the water is prevented from leaking outwards after entering the flowmeter, the measuring error is reduced, and the accuracy of the flowmeter is improved.

7. According to the invention, the rotating shaft and the shell are integrally formed, so that a gap between the shell and the rotating shaft can be avoided, and the measurement precision of the flowmeter is improved. Structural parts can be reduced, and the corrosion of water flow to the rotating shaft and the shell can be avoided, so that the normal work of the flowmeter can be ensured, and the measurement precision of the flowmeter is further ensured.

8. According to the invention, the water inlet and the water outlet are arranged on the first shell or/and the second shell, so that the water inflow of the flowmeter can be increased, the measurement precision can be improved, the water inflow rate of the flowmeter can be increased, and the working efficiency of the cooking utensil can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the construction of the flow meter of the present embodiment in a first orientation;

FIG. 2 is a schematic diagram showing a second orientation of the flow meter of the present embodiment;

FIG. 3 shows a schematic block diagram of another embodiment of a flow meter;

FIG. 4 shows a schematic block diagram of another embodiment of a flow meter;

FIG. 5 shows a cross-sectional view of the flow meter of the present embodiment;

FIG. 6 is a schematic structural view showing a first rotor of the present embodiment;

fig. 7 shows a schematic structural diagram of the hall element of the present embodiment;

fig. 8 shows a schematic structural view of the second housing of the present embodiment;

fig. 9 is a schematic structural diagram showing the operation of the flowmeter according to the embodiment.

The components in the drawings are numbered as follows:

1-a first housing; 2-a water inlet; 3-water outlet; 4-a first rotor; 5-a second rotor; 6-a seal; 7-a hall element; 8-a first magnetic element; 9-a second magnetic element; 10-a second housing.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the prior art, a full-automatic intelligent electric cooker usually adopts a full-automatic water inlet mode. The function of full-automatic water inlet is that a flow meter arranged in the electric cooker controls the water inlet precision and further controls the water inlet quantity. However, when the flowmeter applied to the field of household appliances works, the water flow impacts the rotor of the flowmeter, and then the rotor is pushed to rotate. The rotor of such a flowmeter is provided with slits around its periphery for the discharge of the water flow. When the overlarge gap is arranged, the drainage speed is too high, part of water reaches an outlet through the gap of the flowmeter without playing a role of pushing the rotor to rotate, and is naturally not counted, so that the measurement error is caused, and the precision of the flowmeter is poor. Set up too little gap inconvenient drainage on the contrary, the flowmeter count that just is not convenient for just also. The flowmeter and the cooking utensil provided by the embodiment of the invention can solve the problem that the precision of the flowmeter in the prior art is poor.

As shown in fig. 1 to 9, the embodiment of the present invention provides a flow meter including a case, a first rotor 4, a second rotor 5, and a hall element 7. One end of the shell is provided with a water inlet 2, the other end of the shell is provided with a water outlet 3, and the water inlet 2 and the water outlet 3 are respectively connected with a water inlet pipe and a water outlet pipe of the cooking utensil. First rotor 4 and second rotor 5 set up in the predetermined installation cavity of casing, and the casing is provided with the pivot, and first rotor 4 passes through pivot and casing rotatable coupling with second rotor 5. The peripheral edges of the first rotor 4 and the second rotor 5 are provided with gear structures, and the two are meshed with each other through the gear structures. The first rotor 4 and the second rotor 5 are made of plastic material. The first rotor 4 is provided with a magnetic part, and a hall element 7 is arranged below the first rotor 4 and used for detecting the magnetic pole change of the magnetic part and outputting a corresponding electric signal.

Of course, the magnetic member may be disposed on the second rotor 5, and the hall element 7 may be disposed below the second rotor 5, and the embodiment of the present invention does not limit the disposition position of the magnetic member, and a person skilled in the art may change the position of the magnetic member, and may achieve the same function. Similarly, for the plastic material, a person skilled in the art can change the plastic material itself according to actual conditions, and of course, other materials for reducing the weight of the rotor gear may be adopted, and the same technical effect may be achieved.

So set up, can reduce rotor gear self weight by a wide margin for the water of the small discharge that lets in among the cooking utensil can promote rotor gear. Therefore, when water flows, because the pressure of water in the water inlet 2 is greater than that of the water outlet 3, the pressure acts on the rotor gear, a rotating moment can be formed, the first rotor 4 and the second rotor 5 are pushed to rotate, the flow meter is applied to a cooking appliance, and the accuracy of the flow meter is improved. Through converting the rotor gear into plastics material by stainless steel material, because weight reduces by a wide margin, so do not need the bearing to assist and rotate to production material has been saved.

In addition, the rotating shaft and the shell can be integrally formed, so that a gap between the shell and the rotating shaft can be avoided, and the measurement precision of the flowmeter is improved. Structural parts can be reduced, and the corrosion of water flow to the rotating shaft and the shell can be avoided, so that the normal work of the flowmeter can be ensured, and the measurement precision of the flowmeter is further ensured.

In the embodiment of the present invention, the first rotor 4 and the second rotor 5 are identically provided elliptical rotors, and the first rotor 4 and the second rotor 5 are engaged with each other through a gear structure provided at an outer peripheral edge. After water enters the flowmeter, the pressure of the water inlet 2 is greater than that of the water outlet 3, so that the left end resultant force of the second rotor 5 is downward, the right end resultant force is upward, and a rotating torque is formed, so that the second rotor 5 rotates, the second rotor 5 drives the first rotor 4 to rotate through the gear structure, and simultaneously, the water in the metering cavity is discharged.

With this arrangement, the elliptical rotor can have fewer turns when metering an equal volume of water because it is divided into a major axis and a minor axis as compared to a circular rotor. Because the water has resistance, the elliptical rotor and the circular rotor have the same maximum rotating speed, and the elliptical rotor can measure water with larger flow at the same rotating speed. And because when the rotor rotates, the noise increases along with the increase of rotational speed, under the equal flow, the rotational speed of oval rotor is lower to reduce the noise of flowmeter at the during operation, promoted user's use and experienced.

As another embodiment, as shown in fig. 3, the first rotor 4 and the second rotor 5 may be provided as circular rotors.

As another embodiment, the number of gears on the gear structure may also be reduced, as shown in fig. 4.

The centers of the first rotor 4 and the second rotor 5 are provided with rotating holes which are matched with the rotating shaft to rotate. By the arrangement, the friction force between the first rotor 4 and the second rotor 5 in the rotating process can be reduced, and the error in detection can be reduced, so that the measuring precision of the flowmeter is improved. The first shell 1 and the second shell 10 are buckled with each other, two axial end faces of the first rotor 4 and the second rotor 5 are attached to the shells, long shafts of the first rotor 4 and the second rotor 5 are tangent to the shells, and gaps between the rotors and the shells are reduced.

So set up, can reduce and not promote the water that the rotor just discharged, reduce measuring error, improve flowmeter's accuracy. The gaps between the first rotor 4 and the second rotor 5 and the shell can be reduced by enabling the long axes of the first rotor 4 and the second rotor 5 to be tangent to the shell, when the first rotor 4 and the second rotor 5 rotate, water in the shell can be discharged after completely acting on the rotors, the water discharged without pushing the rotors to rotate is reduced, measuring errors are reduced, and accuracy of the flowmeter is improved. And the unique degree of freedom of the rotor can be ensured when the rotor rotates around the rotating shaft, and the reliability of the structure is enhanced.

In the embodiment of the present invention, the magnetic members include a first magnetic member 8 and a second magnetic member 9, and the first magnetic member 8 and the second magnetic member 9 are disposed at two sides of the rotating shaft and symmetrically disposed. And the magnetism of the side where the first magnetic member 8 and the second magnetic member 9 are close to each other is opposite. The first magnetic member 8 and the second magnetic member 9 are permanent magnets.

As shown in fig. 9, when the water pressure pushes the first rotor 4 and the second rotor 5 to rotate, the first magnetic member 8 and the second magnetic member 9 are driven to rotate at the same time. At the moment, the magnetic poles of the Hall element 7 rotate, the Hall element generates an electric signal when sensing the change of the magnetic poles and transmits the electric signal to the control assembly, and the control assembly counts after receiving the electric signal. In the rotating process, a cavity with a certain space volume is formed between the first rotor 4 and the second rotor 5 and the shell, and the cavity is filled with water, so that the volume of the water discharged by one rotation of the first rotor 4 and the second rotor 5 is four times of the volume of the cavity. At this time, the volume of the cavity is set as a flow coefficient. The Hall circuit measures the number of the rotating turns of the rotor, namely the number of the rotating turns of the magnetic pole, and then the relation is that: the total amount of water can be calculated by using the flow coefficient (obtained by theoretical design) of water. The flow rate coefficient is the flow rate of water discharged by one rotation of the first rotor 4 and the second rotor 5.

So set up, can produce the electric signal with hall element 7 when first rotor 4 and second rotor 5 are rotating, the controller can discern the electric signal and then accurately count to improve the accuracy of flowmeter.

A sealing member 6 is disposed between the first casing 1 and the second casing 10, and the first casing 1 and the second casing 10 are provided with an accommodating cavity adapted to accommodate the sealing member 6. According to the embodiment of the invention, the sealing element 6 is arranged between the first shell 1 and the second shell 10, so that the sealing property between the first shell 1 and the second shell 10 can be improved, and the water is prevented from leaking outwards after entering the flowmeter, thereby reducing the measurement error and improving the accuracy of the flowmeter.

The water inlet 2 and the water outlet 3 are arranged on the plane of the first shell 1 and the second shell 10 at the same time, and the plane is parallel to the first rotor 4. So, can increase the inflow of flowmeter, can improve measuring accuracy in, improve the inflow rate of flowmeter to improve cooking utensil's work efficiency.

As another embodiment, it is also possible to provide only the water inlet 2 and the water outlet 3 on the first casing 1 or the second casing 10. The arrangement positions of the water inlet 2 and the water outlet 3 are not limited, and a person skilled in the art can change the arrangement positions according to actual conditions, so that the same technical effect can be achieved.

In an embodiment of the invention, the inner diameter of the receiving chamber is smaller than the outer diameter of the sealing member 6. So set up, can make in the assembling process and hold chamber and sealing member 6 for interference fit, further improved the leakproofness between first casing 1 and the second casing 10, avoid water to outwards spill after getting into the flowmeter to reduce measuring error, improved the accuracy of flowmeter.

The embodiment of the invention also provides a cooking appliance, which comprises the flowmeter, the inner container, the first conduit and the second conduit. One end of the first conduit is communicated with the water inlet 2, and the other end is connected to a water pump or pressure water. One end of the second conduit is communicated with the water outlet 3, and the other end of the second conduit is connected to the inner container. The inner container is internally provided with a food material cavity suitable for placing food materials. The cooking appliance may be an electric cooker, an electric kettle, or other cooking appliances requiring water, and is not limited herein.

When the cooking appliance needs to be filled with water, the water flows into the flowmeter from one end of the water pump or the high-pressure water through the first guide pipe and then flows into the inner container of the cooking appliance from the water outlet of the flowmeter through the second guide pipe.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. A flow meter, comprising:

a water inlet (2) is arranged at one end of the shell, and a water outlet (3) is arranged at the other end of the shell;

the first rotor (4) and the second rotor (5) are arranged in a preset mounting cavity of the shell, and the first rotor (4) and the second rotor (5) are rotatably connected with the shell through rotating shafts; the first rotor (4) and the second rotor (5) are meshed with each other through a gear structure arranged on the peripheral edge; the first rotor (4) and the second rotor (5) are made of plastic materials;

a magnetic member disposed on the first rotor (4) or the second rotor (5);

and the Hall element (7) is matched with the magnetic piece to work.

2. The flowmeter of claim 1 wherein said shaft is integrally formed with said housing.

3. The flowmeter of claim 2, wherein the first rotor (4) and the second rotor (5) are identically arranged elliptical rotors; the first rotor (4) and the second rotor (5) are meshed with each other through a gear structure arranged on the peripheral edge; the centers of the first rotor (4) and the second rotor (5) are provided with rotating holes which are matched with the rotating shaft to rotate.

4. A meter according to claim 3, wherein the first rotor (4) and the second rotor (5) are fitted to the housing at both axial end faces; the long axes of the first rotor (4) and the second rotor (5) are tangential to the housing.

5. The flowmeter of any of claims 1-4, wherein said magnetic member comprises a first magnetic member (8) and a second magnetic member (9), said first magnetic member (8) and said second magnetic member (9) being disposed on opposite sides of said shaft; the magnetism of the side where the first magnetic part (8) and the second magnetic part (9) are close to each other is opposite.

6. The flowmeter of claims 1-4, wherein the housing comprises a first housing (1) and a second housing (10) that snap fit to each other; the first case (1) and the second case (10) are made of the plastic material or the stainless steel material.

7. The flowmeter of claim 6, characterized in that a seal (6) is arranged between the first casing (1) and the second casing (10), the first casing (1) and the second casing (10) being provided with a housing cavity adapted to house the seal (6).

8. The flowmeter of claim 7, wherein the inner diameter of the receiving cavity is smaller than the outer diameter of the seal (6).

9. The flowmeter of claim 6, wherein the water inlet (2) and outlet (3) are arranged on a plane of the first housing (1) or/and the second housing (10), said plane being parallel to the first rotor (4).

10. A cooking appliance, comprising:

the flow meter of any one of claims 1-9;

the inner container is internally provided with a food material cavity suitable for placing food materials;

one end of the first conduit is communicated with the water inlet (2), and the other end of the first conduit is connected to a water pump or pressure water;

one end of the second conduit is communicated with the water outlet (3), and the other end of the second conduit is connected to the inner container.