Flow sensing assembly and valve device

Abstract

The flow sensing assembly comprises a shell, the shell comprises a water inlet end and a water outlet end, and a channel communicated with the water inlet end and the water outlet end is formed in the shell; a first shaft seat, a rotor and a guide wheel are arranged in the shell, and the first shaft seat, the rotor and the guide wheel are sequentially arranged in the direction from the water outlet end to the water inlet end; the shell comprises a first abutting part, the first abutting part faces the water inlet end, the guide wheel comprises a second abutting part and a second shaft seat, the second abutting part faces the water outlet end, the guide wheel extends into the channel from the water inlet end, and the first abutting part abuts against the second abutting part; the rotor comprises a rotating shaft and blades, the blades are magnetic, and the rotating shaft is rotationally connected between the first shaft seat and the second shaft seat. The rotor and the guide wheel are arranged to be of a split structure, the rotor and the guide wheel can be detached, and the rotor and the guide wheel can be conveniently and independently replaced and maintained.

Description

Technical Field

[0001] The present invention relates to the technical field of flow detection, and more specifically, to a flow sensor component and a valve device having the flow sensor component. Background Art

[0002] As a heating appliance, a wall-mounted boiler usually has two functions: providing domestic hot water and heating. When the water module is in the mode of providing domestic hot water, the domestic water inlet needs to be flow-controlled and monitored by the water flow sensor component to control the working state of the wall-mounted boiler.

[0003] The flow sensors currently used in wall-mounted boiler water circuit replacement are mainly proportional flow sensors and turbine flow sensors. Proportional flow sensors are easier to assemble than turbine types. Turbine types are divided into two types: chip-integrated type and split type. The properties of the split turbine type are not as obvious as the proportional function, but if the integrated turbine chip or rotor is damaged, it cannot be disassembled and can only be replaced together, which is easy to cause waste. The magnet of the proportional flow sensor is fixed by a retaining spring or a plum blossom clamp, and the magnetic ring of the turbine flow sensor is fixed by pressing. If the magnetic ring causes performance failure, it is inconvenient to replace and disassemble it. Summary of the invention

[0004] The object of the present invention is to solve the above-mentioned problem and provide a flow sensor assembly that is convenient for disassembly, assembly and replacement of the rotor.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A flow sensor assembly includes a housing, the housing includes a water inlet end and a water outlet end, and a passage connecting the water inlet end and the water outlet end is arranged in the housing; a first shaft seat, a rotor and a guide wheel are arranged in the housing, and the first shaft seat, the rotor and the guide wheel are arranged in sequence from the water outlet end to the water inlet end; The housing includes a first abutment portion, the first abutment portion faces the water inlet end, the guide wheel includes a second abutment portion and a second shaft seat, the second abutment portion faces the water outlet end, the guide wheel extends from the water inlet end into the channel, and the first abutment portion abuts against the second abutment portion; The rotor comprises a rotating shaft and blades, wherein the blades are magnetic, and the rotating shaft is rotatably connected between the first shaft seat and the second shaft seat.

[0006] In this solution, the rotor and the guide wheel are configured as a split structure, so that the rotor and the guide wheel can be disassembled, and the rotor and the guide wheel can be easily replaced and maintained separately.

[0007] The present invention also provides a valve device, including a valve body, a Hall sensing device and a flow sensor assembly as described above, wherein the flow sensor assembly is arranged in the valve body, the Hall sensing device is fixedly connected to the outside of the valve body, and the Hall sensor can sense each other with the rotor.

[0008] This solution uses a split structure for the magnetic rotor and the Hall sensor device. When part of the equipment is damaged, it can be repaired and replaced separately, which reduces waste and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure of a waterway flow sensor and adjustment component in the embodiment; Figure 2 It is a three-dimensional cross-sectional view of a waterway flow sensor and adjustment component in an embodiment; Figure 3 A cross-sectional view of a waterway flow sensor and adjustment component in an embodiment; Figure 4 is a schematic structural diagram of a housing in an embodiment; Figure 5 is a cross-sectional view of a housing in an embodiment; Figure 6 for Figure 3 Enlarged view of point A in the middle; Figure 7 It is a structural schematic diagram of the guide wheel in the embodiment; Figure 8 is a cross-sectional view of a guide wheel in an embodiment; Fig. 9 for Figure 3 Enlarged view of point B in the middle; Fig.10 Schematic diagram of the structure of the rotor in this embodiment; Fig.11 Schematic diagram of the structure of the current limiting seat in this embodiment; Fig.12 Schematic diagram of the structure of the filtering device in this embodiment; Fig.13 Schematic diagram of the structure of the valve device in this embodiment; Fig.14 is a three-dimensional cross-sectional view of the valve device in this embodiment; Fig.15 2 is a cross-sectional view of the valve device in this embodiment.

[0010] Figure numerals: 1, housing; 11, water inlet end; 12, water outlet end; 13, channel; 14, first abutment portion; 15, third abutment portion; 16, fifth abutment portion; 17, opening; 18, third sealing member; 2, mounting seat; 21, second sealing member; 3, first shaft seat; 31, first shaft hole; 32, first sphere; 4, rotor; 41, rotating shaft; 411, first end; 412, second end; 42, blade; 5, guide wheel; 51, ring body; 52, second shaft Seat; 521, second axial hole; 522, second sphere; 523, water guide hole; 524, water guide groove; 53, guide vane; 54, second abutment; 55, convex ring; 56, guide protrusion; 57, pressure foot; 6, current limiting seat; 61, fourth abutment; 62, first sealing member; 63, current limiting device; 631, current limiting column; 632, throttling body; 7, rectifying net; 8, filtering device; 9, valve body; 91, valve cavity; 92, installation port; 10, Hall sensing device. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] This embodiment discloses a flow sensor assembly, referring to Figure 1-5 As shown, it includes a shell 1, a rotor 4 and a guide wheel 5. The shell 1 is cylindrical, and the two ends of the shell 1 are respectively a water inlet end 11 and a water outlet end 12. A channel 13 for water to flow through is opened in the shell 1. The through groove runs from the water inlet end 11 of the shell 1 to the water outlet end 12, and openings 17 are formed at the water inlet end 11 and the water outlet end 12; water flows in from the opening 17 of the water inlet end 11, flows through various components in the shell 1, and then flows out from the opening 17 of the water outlet end 12.

[0013] A first shaft seat 3 is integrally formed in the housing 1, and a rotor 4 and a guide wheel 5 are also installed in the housing 1. The first shaft seat 3, the rotor 4 and the guide wheel 5 are sequentially arranged along the water outlet 12 toward the water inlet 11. The guide wheel 5 guides the water flow, and can make the water flowing through it tilt and deflect. The water flow forms a spiral shape, and impacts the blades 42 of the rotor 4 to rotate the rotor 4. According to different flow rates, the rotor 4 generates corresponding rotation speeds.

[0014] Reference Figure 7 , 8As shown, the guide wheel 5 generally includes a ring body 51, a second shaft seat 52 and a guide vane 53. The main body of the guide wheel 5 is the ring body 51. The second shaft seat 52 is located at the inner periphery center of the ring body 51. The guide vane 53 is connected between the ring body 51 and the second shaft seat 52. The ring body 51, the second shaft seat 52 and the guide vane 53 are an integrated structure. A plurality of guide vanes 53 are evenly distributed, and a guide channel 13 is formed between the guide vanes 53, through which water can pass, and the flowing water can be guided to form a vortex, thereby driving the rotor 4 to rotate.

[0015] The outer circumference of the ring body 51 is adapted to the inner circumference of the housing 1, and the ring body 51 is loosely matched with the housing 1. The inner circumference of the housing 1 forms a stepped hole structure, and a first abutment portion 14 is formed toward the water inlet end 11. A second abutment portion 54 may be formed on the end surface of the ring body 51, and the second abutment portion 54 faces the water outlet end 12. During installation, the ring body 51 is inserted into the housing 1 from the water inlet end 11, and the second abutment portion 54 of the ring body 51 abuts against the first abutment portion 14, so as to realize the axial positioning of the guide wheel 5.

[0016] Reference Figure 5 , 8 As shown, in order to prevent the guide wheel 5 from being reversely installed during installation, a convex ring 55 can be formed on the outer periphery of the ring body 51 facing the water inlet end 11. The convex ring 55 is larger than the outer periphery of the ring body 51, so that there is a difference in the outer periphery size of the two axial ends of the ring body 51. In addition, another step is correspondingly opened on the inner periphery of the channel 13 of the shell 1 to form a fifth abutment 16 facing the water inlet end 11, which can be matched with the convex ring 55. During installation, in addition, due to the difference in the outer diameter size at both ends of the ring body 51, the guide wheel 5 cannot be installed in place when it is reversely installed, which can play a role in preventing wrong installation; in addition, the convex ring 55 and the fifth abutment 16 abut against each other to achieve supplementary positioning and form two support positions to increase the stability between the guide wheel 5 and the shell 1.

[0017] Reference Fig.10 As shown, the rotor 4 includes a rotating shaft 41 and blades 42, the blades 42 are cross-shaped, and the blades 42 are magnetic. The two ends of the rotating shaft 41 protrude from the two ends of the blades 42 to form a first end 411 and a second end 412, which are rotatably supported by the first shaft seat 3 and the second shaft seat 52, respectively, so as to maintain the running stability of the blades 42.

[0018] The rotor 4 can be specifically formed by injection molding a steel shaft with embedded plastic magnets. The fluid impacts the rotor 4 to make the rotor 4 rotate, forming an alternating magnetic field, and cooperates with the Hall sensor 10 to output a flow signal.

[0019] The first shaft seat 3 is provided with a first shaft hole 31, and the second shaft seat 52 is provided with a second shaft hole 521. The first shaft hole 31 and the second shaft hole 521 are coaxial, and the apertures of the first shaft hole 31 and the second shaft hole 521 are adapted to the rotating shaft 41. During installation, the two ends of the rotating shaft 41 extend into the first shaft hole 31 and the second shaft hole 521 respectively, and the rotation of the rotor 4 can be realized through the rotation support of the second shaft seat 52 and the first shaft seat 3. The first shaft hole 31 and the second shaft hole 521 are both blind holes, and are open toward the direction of the rotating shaft 41, so that the rotating shaft 41 can extend therein.

[0020] During use, foreign particles may be deposited in the first shaft hole 31, which may easily cause blockage between the first shaft hole 31 and the rotating shaft 41. The friction resistance between the rotating shaft 41 and the first shaft hole 31 will increase, resulting in a low speed of the rotor 4. The magnetic field will alternate slowly as the speed decreases, and the output frequency will deviate from the required value in a large range, thereby adversely affecting the functional accuracy of the equipment. Especially when the system is started from a stationary state, excessive friction resistance may even cause the rotating shaft 41 to get stuck, resulting in the system being unable to obtain the actual parameters of the water flow.

[0021] To reduce the rotation resistance of the rotating shaft 41, the first sphere 32 can be installed in the first shaft hole 31, the first sphere 32 is located at the bottom of the first shaft hole 31, and the first sphere 32 is clamped and fixed with the first shaft hole 31. The first end 411 of the rotating shaft 41 extends into the first shaft hole 31, and the end surface of the first end 411 can contact the surface of the first sphere 32.

[0022] The second sphere 522 is installed in the second shaft hole 521, and the sphere is located at the bottom of the second shaft hole 521. The second sphere 522 is clamped and fixed to the second shaft hole 521. The second end 412 of the rotating shaft 41 extends into the second shaft hole 521, and the end surface of the second end 412 can contact the surface of the first sphere 32.

[0023] During the rotation of the shaft 41, point-to-surface frictional contact is formed between the end face of the shaft 41 and the first sphere 32 and the second sphere 522, which can effectively reduce the frictional resistance of the shaft 41 and effectively reduce contact wear. In addition, the distance between the first sphere 32 and the second sphere 522 is slightly greater than the length of the shaft 41, so that the shaft 41 also forms a clearance fit state between the first sphere 32 and the second sphere 522. During the rotation of the shaft 41, the shaft 41 will intermittently contact the first sphere 32 and the second sphere 522 at both ends, and water can be used as a medium between the shaft 41 and the spheres, thereby effectively reducing the frictional resistance of the shaft 41 and effectively reducing the wear of the contact position.

[0024] Reference Figure 7-9As shown, the second shaft seat 52 is provided with a water guide hole 523, one end of the water guide hole 523 is connected to the first shaft hole 31, and the other end extends through the second shaft seat 52 in the direction of the water inlet end 11. In addition, a plurality of water guide grooves 524 are formed on the inner wall of the first shaft hole 31, and the water guide grooves 524 correspond to the water guide holes 523 one by one. One end of the water guide groove 524 is connected to the water guide hole 523, and the other end passes through the second shaft seat 52 in the direction of the water outlet end 12, so that a water guide channel 13 can be formed on the outer periphery of the rotating shaft 41. The number of water guide holes 523 can be multiple, for example, the number of water guide holes 523 in the figure is three.

[0025] When water flows through the guide wheel 5, part of the water flow can directly enter the first shaft hole 31 from the water guide hole 523, allowing the fluid to directly contact the rotating shaft 41 of the rotor 4, acting as a lubricating medium outside the rotating shaft 41, playing a role of lubrication during rotation and starting, reducing the friction resistance of the rotating shaft 41, and preventing the rotor 4 from getting stuck; when the rotating shaft 41 rotates and starts, the required force is smaller, which can improve the overall functional accuracy, especially under low flow conditions, the accuracy improvement is more significant.

[0026] In order to improve the smoothness of the fluid passing through the water guide wheel, a guide protrusion 56 is formed on the side of the second shaft seat 52 facing the water inlet end 11. The guide protrusion 56 is a hemispherical protrusion. After the water flow hits the guide protrusion 56, it can be dispersed outward, so that the water flow can enter the guide blade 53 of the guide wheel 5 more evenly, improving the stability of the water flow. In addition, the end position of the water guide hole 523 also passes through the guide protrusion 56, and the opening 17 of the water guide hole 523 is located at the arc surface of the guide protrusion 56.

[0027] Reference Figure 2-3 As shown in Figure 11, in order to improve the functional integration of the flow sensor assembly, a rectifying network 7, a current limiting device 63 and a filtering device 8 may also be installed.

[0028] A flow limiting seat 6 and a rectifying net 7 are installed in the channel 13 of the housing 1 near the water inlet end 11. The flow limiting seat 6 is annular in structure, and the outer peripheral portion of the flow limiting seat 6 is in clearance with the inner peripheral portion of the housing 1. A second sealing member 21 is sleeved on the outer periphery of the flow limiting seat 6, and the second sealing member 21 is limited by the sealing groove 3 on the outer periphery of the flow limiting seat 6.

[0029] Part of the current limiting seat 6 extends into the shell 1, and the joint between the current limiting seat 6 and the shell 1 can be sealed by the second sealing member 21; moreover, the second sealing member 21 is stuck between the current limiting seat 6 and the shell 1, and the second sealing member 21 is squeezed, so that a certain friction resistance is formed between the current limiting seat 6 and the shell 1, thereby maintaining the installation stability of the current limiting seat 6.

[0030] A third abutment portion 15 is formed on the housing 1, and the end surface of the water inlet end 11 of the housing 1 serves as the third abutment portion 15. A fourth abutment portion 61 is formed on the outer periphery of the current limiting seat 6, and the fourth abutment portion 61 faces the direction of the water inlet end 11 and can abut against the third abutment portion 15, so as to axially locate the installation position of the current limiting seat 6.

[0031] The rectifying net 7 is installed between the guide wheel 5 and the current limiting seat 6 to achieve the effect of convection flow rectification. The fluid in the lasing state impacts the rectifying net 7, and the rectifying net 7 provides a certain flow resistance to make the fluid movement state smoother.

[0032] The outer circumferential size of the rectifying net 7 matches the inner circumferential clearance of the housing 1. During installation, one side of the rectifying net 7 fits with one side of the ring body 51 to achieve axial positioning. The current limiting seat 6 is installed from the water inlet end 11 of the housing 1, and the end face of the current limiting seat 6 can be pressed against the other side of the rectifying net 7. The ring body 51 of the guide wheel 5, the rectifying net 7 and the current limiting seat 6 are pressed against each other in sequence to achieve axial limitation. Through the extrusion and friction of the first sealing member 62, the rotor 4, the guide wheel 5, the rectifying net 7 and the current limiting seat 6 can be restricted in the housing 1, which is convenient for assembling the waterway flow sensor and adjustment component.

[0033] Reference Figure 7 As shown, in order to improve the stability of the rectifying net 7, a presser foot 57 can be provided on the side of the blade 42 facing the rectifying net 7. The presser foot 57 is integrally formed with the blade 42 and connected to the ring body 51 of the guide wheel 5. A gap for accommodating the guide protrusion 56 is formed between the presser foot 57 of each blade 42. The presser foot 57 and the end face of the ring body 51 are flush with each other. The rectifying net 7 and the guide wheel 5 are assembled, and the presser foot 57 and the ring body 51 are used to resist the rectifying net 7, which can increase the support strength of the rectifying net 7, so that the rectifying net 7 can withstand greater water flow impact. The presser foot 57 can form an annular support on the end face of the guide wheel 5 facing the water inlet end 11, so that the guide protrusion 56 in the middle of the guide wheel 5 does not directly conflict with the rectifying net 7. The rectifying net 7 and the guide protrusion 56 cooperate with each other, which can make the flow state smoother.

[0034] Reference Figure 2 , 3 As shown, the waterway flow sensing and regulating assembly also includes a flow limiting device 63, which is installed in the flow limiting seat 6 to limit the water flow and maintain the stability of the water flow. The flow limiting device 63 includes a flow limiting column 631 and a throttling body 632, and the flow limiting column 631 and the annular throttling body 632 cooperate with the flow limiting seat 6 to achieve the flow limiting function. The flow limiting device 63 can also use an existing flow limiting component that can stabilize the water flow, or the flow limiting device 63 may not be set in the waterway flow sensing and regulating assembly, and the flow limiting device 63 can be installed at the water inlet of the equipment to achieve the function of limiting the water flow before entering the shell 1.

[0035] Reference Figure 2 , 3 As shown, the water path flow sensing and regulating assembly also includes a filtering device, which is installed at the end of the current limiting seat 6 facing away from the shell 1. The filtering device can filter large particulate impurities to prevent particulate impurities from entering the rotor 4 channel 13 and causing the shaft to become stuck and unable to rotate.

[0036] Reference Figure 3 , 11 As shown in FIG. 12 , a snap-fit ​​structure can be used between the current limiting seat 6 and the filter device. After the filter device is snapped into the current limiting seat 6, it cooperates with the slot of the current limiting seat 6 through interference extrusion to play a positioning role. Alternatively, the filter device can also be installed using other connection structures.

[0037] This embodiment also discloses a valve device, referring to Figure 13-15 As shown, it includes a valve body 9, a Hall sensing device 10 and a flow sensor assembly as in the above embodiment; wherein, a valve cavity 91 is arranged inside the valve body 9, the shape of the valve cavity 91 is adapted to the housing 1, and an installation port 92 is arranged outside the valve body 9, and the installation port 92 is connected to the valve cavity 91.

[0038] The flow sensor assembly also includes a mounting seat 2, which is integrally formed with the housing 1 and is located on one side of the water outlet 12 of the housing 1. The mounting seat 2 and the mounting port 92 are adapted to each other, and the two can be fixedly connected, thereby realizing the connection between the flow sensor assembly and the valve body 9. The fixed seat and the mounting port 92 are clearance-matched, and a second sealing member 21 is installed on the outer periphery of the fixed seat, and the fixed seat and the mounting port 92 are sealed to each other by the second sealing member 21.

[0039] The flow sensor assembly extends from the installation port 92 into the valve cavity 91, and the water inlet end 11 and the water outlet end 12 of the housing 1 extend into the corresponding positions of the valve cavity 91. The mounting seat 2 is fixedly connected to the installation port 92, and the water flow in the valve body 9 can flow through the channel 13 in the housing 1, flow in from the water inlet end 11, and flow out from the water outlet end 12. When the water flows through the valve body 9, it will flow through the flow sensor assembly.

[0040] In addition, the fixing seat and the mounting opening 92 need to be fixed, which can be achieved by snap connection or medium fixing pins, and can achieve positioning and keep the positions of both fixed. For example, a radial protrusion can be set on the outer periphery of the fixing seat, and a radial recess can be set at the mounting opening 92. The radial protrusion and the radial recess are adapted to each other, which can achieve positioning between the fixing seat and the valve body 9. The fixing seat can be installed and fixed by axially pressing the radial protrusion with the buckle.

[0041] The housing 1 and the valve cavity 91 are sealed by the third seal 18, and the inner sealing of the valve body 9 is realized by the third seal 18. When the water flows in the valve body 9, it can only flow from the inner channel 13 of the housing 1, so that all the water can flow through the waterway flow sensing and regulating component without flow loss, thereby improving the flow sensing accuracy.

[0042] The Hall sensor 10 is installed outside the valve body 9, and the installation position corresponds to the middle of the blade 42 of the rotor 4. The Hall sensor 10 cooperates with the rotor 4. During operation, the fluid impacts the rotor 4 to make the rotor 4 rotate, forming an alternating magnetic field, and cooperating with the Hall sensor 10 to realize the signal output of the water flow parameter.

[0043] The Hall sensor device 10 specifically includes a connector and a Hall sensor element, wherein the Hall sensor element plays a role of mutual induction with the rotor 4, and the connector plays a role of connecting with the outside of the valve body 9. The connector can be connected to the valve body 9 by a clamping structure, a clamping structure, or other connection methods, and can be fixed to the valve body 9.

[0044] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A flow sensor assembly, characterized in that: The invention comprises a shell (1), wherein the shell (1) comprises a water inlet end (11) and a water outlet end (12), and a passage (13) connecting the water inlet end (11) and the water outlet end (12) is provided in the shell (1); a first shaft seat (3), a rotor (4) and a guide wheel (5) are provided in the shell (1), and the first shaft seat (3), the rotor (4) and the guide wheel (5) are arranged in sequence from the water outlet end (12) to the water inlet end (11); The housing (1) comprises a first abutting portion (14), the first abutting portion (14) faces the water inlet end (11), the guide wheel (5) comprises a second abutting portion (54) and a second shaft seat (52), the second abutting portion (54) faces the water outlet end (12), the guide wheel (5) extends from the water inlet end (11) into the channel (13), and the first abutting portion (14) abuts against the second abutting portion (54); The rotor (4) comprises a rotating shaft (41) and blades (42), wherein the blades (42) are magnetic, and the rotating shaft (41) is rotatably connected between the first shaft seat (3) and the second shaft seat (52).

2. The flow sensor assembly according to claim 1, characterized in that: The rotating shaft (41) includes a first end (411), the first shaft seat (3) is provided with a first shaft hole (31), and the first end (411) is rotatably connected to the first shaft hole (31); the rotor (4) includes a rotating shaft (41), the rotating shaft (41) includes a second end (412), the second shaft seat (52) is provided with a second shaft hole (521), and the second end (412) is rotatably connected to the second shaft hole (521).

3. The flow sensor assembly according to claim 2, characterized in that: A first sphere (32) is disposed in the first axial hole (31), and an end surface of the first end (411) is capable of contacting the first sphere (32).

4. The flow sensor assembly according to claim 2, characterized in that: A second sphere (522) is disposed in the second axial hole (521), and an end surface of the second end (412) can abut against the second sphere (522).

5. The flow sensor assembly according to claim 4, characterized in that: The second shaft seat (52) is provided with a water guide hole (523), the water guide hole (523) is connected to the first shaft hole (31), and the water guide hole (523) passes through the second shaft seat (52) in the direction of the water inlet end (11); the water guide groove (524) is connected to the water guide hole (523) and passes through the second shaft seat (52) in the direction of the water outlet end (12).

6. The flow sensor assembly according to claim 1, characterized in that: A rectifying net (7) is arranged in the channel (13) of the housing (1), and the rectifying net (7) is located on a side of the guide wheel (5) close to the water inlet end (11).

7. The flow sensor assembly according to claim 1, characterized in that: It also comprises a flow limiting seat (6) and a flow limiting device (63), wherein the flow limiting seat (6) is connected to the water inlet end (11) of the housing (1), and the flow limiting device (63) is located inside the flow limiting seat (6).

8. The flow sensor assembly according to claim 7, characterized in that: The rectifying net (7) is located between the guide wheel (5) and the current limiting seat (6), and the guide wheel (5), the rectifying net (7) and the current limiting seat (6) are abutted against each other in sequence.

9. The flow sensor assembly according to claim 7, characterized in that: It also comprises a filtering device (8), wherein the filtering device (8) is connected to the current limiting seat (6).

10. A valve device, characterized in that: It comprises a valve body (9), a Hall sensing device (10) and a flow sensing assembly as described in any one of claims 1 to 9, wherein the flow sensing assembly is arranged in the valve body (9), the Hall sensing device (10) is fixedly connected to the outside of the valve body (9), and the Hall sensor can sense each other with the rotor (4).

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