Flow sensor and electric appliance

Abstract

The utility model provides a flow sensor and an electric appliance, and the flow sensor comprises a housing which comprises a main body and a cover body; the main body is provided with a mounting port and a detection channel communicated with the mounting port; the cover body is arranged at the mounting opening and combined with the main body to form an assembly space; the impeller assembly is installed at the installation opening, one part of the impeller assembly is located in the detection channel, and the other part of the impeller assembly is located in the assembly space; the impeller assembly comprises an impeller and a magnet arranged on the impeller; and the Hall element is arranged on the shell and outputs a corresponding electric signal after sensing the change of the magnetic field. The cover body can be sealed after the impeller assembly is installed from the installation opening, assembling is convenient, and the production efficiency can be effectively improved; besides, the impeller, the magnet and the Hall element are installed on the shell, the flow sensor capable of detecting the flow can be obtained, the structure is simple, the size of the flow sensor can be reduced, and the flow sensor is suitable for application in a small space.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and in particular relates to a flow sensor and an electrical appliance. Background Art

[0002] Flow sensors are mainly used to detect the flow of liquids and realize real-time statistics of liquid flow. They can be applied to the detection of liquid flow in pipes of household appliances. Flow sensors in the prior art, such as the Hall water flow sensor of Chinese patent CN215865346U, have a complex structure and are difficult to assemble. In addition, the Hall water flow sensor has certain regulations on the direction of the water inlet and the water outlet, stipulating that the flow can only be detected after the water flows in from the water inlet, and the flow cannot be detected if the water flows in from the water outlet. The use is limited and cannot meet customer needs. Utility Model Content

[0003] In order to overcome the above technical defects, the utility model provides a flow sensor, which can solve the technical problems of the flow sensor in the prior art that the structure is complex and difficult to assemble.

[0004] The utility model is implemented according to the following technical solutions:

[0005] The utility model provides a flow sensor, which includes:

[0006] The housing comprises a main body and a cover body; the main body is provided with a mounting port and a detection channel connected to the mounting port; the cover body is arranged at the mounting port and is combined with the main body to form an assembly space;

[0007] An impeller assembly is installed at the installation port, a part of the impeller assembly is located in the detection channel, and another part is located in the assembly space; the impeller assembly includes an impeller and a magnet arranged on the impeller;

[0008] A Hall element is arranged on the housing, and outputs a corresponding electrical signal after sensing a change in the magnetic field.

[0009] The present application can install the impeller assembly from the installation port and then seal the cover body, which is easy to assemble and can effectively improve production efficiency. In addition, the present application innovatively installs the impeller, magnet, and Hall element on the shell to obtain a flow sensor that can detect the flow rate, abandoning the complex structure of the prior art, with a simple structure and the ability to reduce the volume of the flow sensor, making it suitable for applications in small spaces.

[0010] In one embodiment, the detection channel has a first end and a second end, the first end is configured to allow liquid to flow in or out, and the second end is configured to allow liquid to flow out or in.

[0011] In one embodiment, the impeller assembly further comprises a positioning shaft, and the positioning shaft is arranged on the rotation axis of the impeller;

[0012] The installation opening is provided with a positioning groove, and the positioning groove is installed and matched with the positioning shaft.

[0013] In one embodiment, the cover body is provided with a fixing groove, and the fixing groove is arranged corresponding to the positioning groove;

[0014] When the cover body is sealed on the installation opening, the fixing groove is combined with the positioning groove to fix the positioning shaft.

[0015] In one embodiment, a sealing member is provided between the main body and the cover body.

[0016] In one embodiment, the main body is provided with a convex rib extending upward from the installation opening toward the cover body, and the convex rib is arranged around the cover body.

[0017] In one embodiment, the impeller is provided with a receiving hole, and the receiving hole receives the magnet.

[0018] In one embodiment, the impeller is provided with a plurality of blades, and the plurality of blades are distributed around the rotation axis of the impeller;

[0019] The two blades are respectively provided with the magnets, and the two magnets are centrally symmetrically arranged relative to the rotation axis.

[0020] In one embodiment, the flow sensor further includes a control circuit board, and the Hall element is provided on the control circuit board;

[0021] The outer side surface of the shell is provided with a receiving groove, and the control circuit board is accommodated in the receiving groove.

[0022] The utility model also provides an electrical appliance, which comprises the flow sensor as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0024] Figure 1 A three-dimensional diagram of the flow sensor of the utility model;

[0025] Figure 2 It is a cross-sectional view of the flow sensor of the utility model;

[0026] Figure 3 This is an exploded view of the flow sensor of the utility model;

[0027] Figure 4 It is an exploded schematic diagram of the flow sensor of the present utility model.

[0028] Description of reference numerals:

[0029] 10 main body, 110 installation opening, 111 positioning groove, 112 convex rib, 120 detection channel, 121 first end, 122 second end, 130 assembly space, 140 receiving groove, 20 cover, 211 fixing groove, 30 impeller assembly, 310 impeller, 320 magnet, 330 positioning shaft, 40 Hall element, 50 control circuit board, 60 sealing member DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0031] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0032] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0034] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0036] Combination Figures 1 to 4 As shown, the utility model provides a flow sensor, which includes: a shell, which includes a main body 10 and a cover body 20; the main body 10 is provided with a mounting port 110 and a detection channel 120 connected to the mounting port 110; the cover body 20 is arranged at the mounting port 110 and is combined with the main body 10 to form an assembly space 130; an impeller assembly 30, which is installed at the mounting port 110, wherein a part of the impeller assembly 30 is located in the detection channel 120, and another part is located in the assembly space 130; the impeller assembly 30 includes an impeller 310 and a magnet 320 arranged on the impeller 310; a Hall element 40, which is arranged on the shell, and the Hall element 40 outputs a corresponding electrical signal after sensing a change in the magnetic field.

[0037] The present application can install the impeller assembly 30 from the installation port 110 and then seal the cover body 20, which is easy to assemble and can effectively improve production efficiency. In addition, the present application innovatively installs the impeller 310, the magnet 320, and the Hall element 40 on the shell to obtain a flow sensor that can detect the flow rate, abandoning the complex structure of the prior art, with a simple structure and the ability to reduce the volume of the flow sensor, making it suitable for applications in small spaces.

[0038] In one embodiment, the detection channel 120 has a first end 121 and a second end 122, the first end 121 is configured to allow liquid to flow in or out, and the second end 122 is configured to allow liquid to flow out or in. The present application can input liquid from the first end 121 or the second end 122, so that the connection of the present application with other pipelines will not be restricted.

[0039] Specifically, the flow sensor of the present application is installed and connected to the corresponding pipeline. Since the present application can flow liquid from the first end 121 or the second end 122, the installation and connection are not restricted. Take the example of liquid flowing in from the first end 121 and flowing out from the second end 122. The liquid will drive the impeller assembly 30 to rotate during the flow in the detection channel 120. The magnetic field change can be generated during the rotation of the magnet 320. The Hall element 40 outputs a high pulse level or a low pulse level according to the current magnetic field change, thereby obtaining the water flow information in the accommodating cavity.

[0040] It should be noted that the detection channel 120 of the present embodiment is a straight-through tube, which can maintain smooth flow of liquid, reduce turbulence caused by changes in curves, and ensure stable and reliable signals.

[0041] In one embodiment, the impeller assembly 30 also includes a positioning shaft 330, and the positioning shaft 330 is arranged on the rotation axis of the impeller 310; the mounting port 110 is provided with a positioning groove 111, and the positioning groove 111 is installed and matched with the positioning shaft 330. The position of the impeller assembly 30 is positioned and limited by the positioning groove 111, which can speed up the assembly speed and reduce the difficulty of assembly.

[0042] Furthermore, the cover body 20 is provided with a fixing groove 211, and the fixing groove 211 is arranged corresponding to the positioning groove 111; when the cover body 20 is sealed on the installation opening 110, the fixing groove 211 is combined with the positioning groove 111 to fix the positioning shaft 330 to prevent the impeller assembly 30 from loosening.

[0043] In one embodiment, a seal 60 is provided between the main body 10 and the cover 20, and the seal 60 is used to seal the position between the main body 10 and the cover 20 to prevent liquid leakage. Preferably, the seal 60 is a sealing ring.

[0044] Furthermore, after the assembly is completed, resin glue can be added between the main body 10 and the cover body 20 for packaging.

[0045] In one embodiment, the main body 10 is provided with a convex rib 112 extending upward from the installation port toward the cover body 20, and the convex rib 112 is arranged around the cover body 20 to adapt to the outer edge of the cover body 20, so as to better complete the assembly and cooperate with the subsequent resin glue packaging process.

[0046] In one embodiment, the impeller 310 is provided with a receiving hole, and the receiving hole receives the magnet 320 so as to reasonably utilize the space on the impeller 310 .

[0047] In one embodiment, the impeller 310 is provided with a plurality of blades, and the plurality of blades are distributed around the rotation axis of the impeller 310; wherein two of the blades are respectively provided with the magnets 320, and the two magnets 320 are centrally symmetrically arranged relative to the rotation axis. In this embodiment, the detection speed of the Hall element 40 for the water flow is accelerated by increasing the number of the magnets 320, thereby achieving a rapid response.

[0048] In one embodiment, the flow sensor also includes a control circuit board 50, on which the Hall element 40 is disposed; an accommodating groove 140 is disposed on the outer side of the shell, in which the control circuit board 50 is accommodated, thereby rationally utilizing the space on the shell.

[0049] The utility model also provides an electrical appliance, which includes the flow sensor as described above, and the electrical appliance includes a floor scrubber robot, a washing machine, a humidifier, a water dispenser, and other electrical appliances that need to monitor liquid flow.

[0050] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A flow sensor, characterized in that: include: The housing comprises a main body and a cover; the main body is provided with a mounting port and a detection channel communicating with the mounting port; The cover body is arranged at the installation opening and is combined with the main body to form an assembly space; An impeller assembly is installed at the installation port, a part of the impeller assembly is located in the detection channel, and another part is located in the assembly space; the impeller assembly includes an impeller and a magnet arranged on the impeller; A Hall element is arranged on the housing, and outputs a corresponding electrical signal after sensing a change in the magnetic field.

2. The flow sensor according to claim 1, characterized in that: The detection channel has a first end and a second end, wherein the first end is configured to allow liquid to flow in or out, and the second end is configured to allow liquid to flow out or in.

3. The flow sensor according to claim 1, characterized in that: The impeller assembly further includes a positioning shaft, and the positioning shaft is arranged on the rotation axis of the impeller; The installation opening is provided with a positioning groove, and the positioning groove is installed and matched with the positioning shaft.

4. The flow sensor according to claim 3, characterized in that: The cover body is provided with a fixing groove, and the fixing groove is arranged corresponding to the positioning groove; When the cover body is sealed on the installation opening, the fixing groove is combined with the positioning groove to fix the positioning shaft.

5. The flow sensor according to claim 1, characterized in that: A sealing member is provided between the main body and the cover body.

6. The flow sensor according to claim 1, characterized in that: The main body is provided with a convex rib extending upward from the installation opening toward the cover body, and the convex rib is arranged around the cover body.

7. The flow sensor according to claim 1, characterized in that: The impeller is provided with a receiving hole, and the receiving hole receives the magnet.

8. The flow sensor according to claim 1 or 7, characterized in that: The impeller is provided with a plurality of blades, and the plurality of blades are distributed around the rotation axis of the impeller; The two blades are respectively provided with the magnets, and the two magnets are centrally symmetrically arranged relative to the rotation axis.

9. The flow sensor according to claim 1, characterized in that: The flow sensor also includes a control circuit board, on which the Hall element is provided; The outer side surface of the shell is provided with a receiving groove, and the control circuit board is accommodated in the receiving groove.

10. An electrical appliance, characterized in that: Comprising a flow sensor as described in any one of claims 1-9.

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