Floater flow sensor and water heating device
By using float flow sensors in the hot water device and using the movement of floats and excitation cores in the vertical flow channel, the accuracy and stability of flow detection are achieved, and the problem of high requirements for consumable parts and cleanliness in the prior art is solved, reducing costs and blockage.
Patent Information
- Application Number
- CN202311251887.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-26
- Publication Date
- 2025-03-28
AI Technical Summary
In existing hot water devices, the consumable parts of the turbine flowmeter and the high requirements for the cleanliness of the water flow lead to unstable accuracy and high cost.
A float flow sensor is used, which includes a body structure, a float, an induction coil and a circuit board. The float moves in the vertical flow channel to drive the excitation core to adjust the position, the induction coil and the excitation core form an inductor, and changes the oscillation frequency of the LC oscillation circuit, thereby realizing flow detection.
There is no need to rotate the magnetic core rotor, which avoids consumable parts, and has more stable accuracy and better accuracy in long-term use; the liquid cleanliness requirements are not high, reducing blockage and costs.
Smart Images
Figure CN119714442A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to a flow sensor, and in particular to a float flow sensor and a hot water device. Background Art
[0002] Hot water devices in related technologies usually use turbine flowmeters to measure the water inlet flow rate. The turbine flowmeter is equipped with a rotor with a magnet in the middle of the water channel. The rotor has vortex blades. When the water flows through the rotor, the rotor will rotate. The faster the water flows, the higher the rotation speed. A Hall element is provided on the housing on the side of the rotor. The Hall element cuts the rotating magnetic field generated by the magnet to generate a periodically changing frequency, which is output to the main board of the hot water device. The main board reads the water inlet flow rate according to the calibrated frequency and matches the corresponding heat load. However, long-term rotating parts, such as bearings and vortex blades, will affect the accuracy after wear, and it is difficult to maintain accuracy for a long time. Regular inspection and replacement are required. In addition, since hair, rubber strips and other strip-shaped foreign objects are easy to entangle the rotor, there are high requirements for the cleanliness of the water flow, and a filter is often required, which increases the cost. Summary of the invention
[0003] The first technical problem solved by the present application is to provide a float flow sensor which can effectively maintain long-term accuracy, reduce clogging and reduce costs.
[0004] The second technical problem solved by the present application is to provide a hot water device that can effectively maintain long-term accuracy, reduce clogging, and reduce costs.
[0005] The first technical problem mentioned above is solved by the following technical solution:
[0006] A float flow sensor, the float flow sensor comprising:
[0007] A main structure, wherein the main structure is provided with a vertical flow channel;
[0008] A float, wherein the float is provided with an excitation core, a throttling gap is formed between the outer wall of the float and the inner wall of the vertical flow channel, the float is movably arranged in the vertical flow channel, and the balance position is adjusted along the axial direction of the vertical flow channel as the flow rate of the fluid in the vertical flow channel changes;
[0009] an induction coil, the induction coil being disposed on the main structure around the circumference of the vertical flow channel, the induction coil and the excitation core forming an inductor; and
[0010] A circuit board is provided with a detection circuit, the detection circuit is provided with a capacitor, the detection circuit is electrically connected to the induction coil, and the inductor and the capacitor form an LC oscillation circuit.
[0011] The float flow sensor described in this application has the following beneficial effects compared with the background technology:
[0012] When the fluid flow rate in the vertical channel of the above-mentioned float flow sensor changes, the float adjusts its equilibrium position along the axial direction of the vertical channel, which can drive the excitation core to adjust its position in the vertical channel accordingly. At this time, since the induction coil is in a stationary state, the relative position of the excitation core and the induction coil along the axial direction changes, causing the inductance of the inductor formed by the induction coil and the excitation core to change, thereby changing the oscillation frequency of the LC oscillation circuit. Different oscillation frequencies correspond to different flow rates to achieve flow detection. It can be seen that there is no need to set up a rotating magnetic core rotor as in the related art, that is, there are no wearing parts, and the long-term use precision is more stable and the accuracy is better; in addition, the requirements for liquid cleanliness are not high. Even if there are foreign objects, as long as they are smaller than the narrow mouth, they can flow, and there is no need to worry about the winding rotor getting stuck, which can reduce blockage and reduce costs.
[0013] In one of the embodiments, the float flow sensor further includes a central shaft penetrating through the vertical channel, the central shaft is connected to the main structure, and the float is movably sleeved on the central shaft.
[0014] In one of the embodiments, a mounting seat is provided at at least one end of the vertical flow channel, the central axis is connected to the mounting seat, and at least one through hole connected to the vertical flow channel is formed on the mounting seat.
[0015] In one of the embodiments, the mounting seats are respectively provided at the opposite ends of the vertical flow channel, and the opposite ends of the central axis are respectively connected to the two mounting seats; the through holes are provided in plurality and are arranged in sequence around the circumference of the central axis; the mounting seat located at the top of the vertical flow channel is provided with a limiting portion extending toward the bottom of the vertical channel, and when the float and the limiting portion are in contact with each other, the top surface height of the excitation core is lower than or equal to the top surface height of the induction coil.
[0016] In one of the embodiments, the throttling gap is arranged around the circumference of the float; when the float moves toward the top of the vertical flow channel, the size of the throttling gap gradually increases.
[0017] In one embodiment, a first abutment portion is provided around the outer wall of the float, the first abutment portion is provided with a first abutment surface, the first abutment surface cooperates with the inner wall of the vertical flow channel to form the throttling gap; the outer diameter of the first abutment surface tends to increase in the direction from the bottom end of the vertical flow channel to the top end of the vertical flow channel; the inner diameter of the vertical flow channel tends to increase in the direction from the bottom end of the vertical flow channel to the top end of the vertical flow channel; the angle formed by the first abutment surface and the central axis of the vertical flow channel is set to a first angle, the angle formed by the inner wall of the vertical flow channel and the central axis of the vertical flow channel is set to a second angle, and the first angle is greater than the second angle.
[0018] In one embodiment, the float is arranged in a cone shape, and a second abutment portion is arranged around the inner wall of the vertical flow channel, and the second abutment portion cooperates with the outer wall surface of the float to form the throttling gap.
[0019] In one embodiment, the main structure includes a first shell and a second shell that are detachably connected, and a sealing ring connected between the first shell and the second shell; the bottom end of the vertical flow channel is formed on the first shell, and the top end of the vertical flow channel is formed on the second shell.
[0020] In one embodiment, a first thread is provided on the outer wall of the first shell, and a second thread adapted to the first thread is provided on the inner wall of the second shell;
[0021] A first installation chamber is formed between the outer wall of the first shell and the inner wall of the second shell and is arranged around the circumference of the first shell, and the induction coil is arranged inside the first installation chamber;
[0022] The induction coil is tightly wound on the outer wall of the first shell;
[0023] A second installation cavity is disposed on the outer wall of the first shell, the circuit board is installed inside the second installation cavity, and the connecting end of the induction coil passes through the first installation cavity and the second installation cavity in sequence and then is connected to the circuit board.
[0024] The above second technical problem is solved by the following technical solution:
[0025] A water heating device comprises the float flow sensor.
[0026] The hot water device described in this application has the following beneficial effects compared with the background technology:
[0027] In the above-mentioned hot water device, when the fluid flow rate inside the vertical flow channel changes, the float adjusts its equilibrium position along the axial direction of the vertical flow channel, which can drive the excitation core to adjust its position in the vertical channel accordingly. At this time, since the induction coil is in a stationary state, the relative position of the excitation core and the induction coil along the axial direction changes, causing the inductance of the inductor formed by the induction coil and the excitation core to change, thereby changing the oscillation frequency of the LC oscillation circuit. Different oscillation frequencies correspond to different flow rates to achieve flow detection. It can be seen that there is no need to set up a rotating magnetic core rotor as in the related art, that is, there are no wearing parts, and the long-term use precision is more stable and the accuracy is better; in addition, the requirements for liquid cleanliness are not high. Even if there are foreign objects, as long as they are smaller than the narrow mouth, they can flow, and there is no need to worry about the winding rotor getting stuck, thereby reducing blockage and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0030] Figure 1 This is a structural diagram of a float flow sensor according to an embodiment of the present application.
[0031] Figure 2 for Figure 1 A breakdown structure diagram of the structure shown.
[0032] Figure 3 for Figure 1 Another perspective structural diagram of the structure shown.
[0033] Figure 4 for Figure 3 Cross-sectional view of the structure at AA.
[0034] Figure 5 for Figure 1 Another perspective structural diagram of the structure shown.
[0035] Figure 6 for Figure 1 Another perspective structural diagram of the structure shown.
[0036] Figure 7 This is a structural diagram of a float flow sensor according to another embodiment of the present application.
[0037] Figure 8 for Figure 7 A breakdown structure diagram of the structure shown.
[0038] Fig. 9 for Figure 7 Another perspective structural diagram of the structure shown.
[0039] Fig.10 for Fig. 9 Cross-sectional view of the structure at BB.
[0040] Reference numerals:
[0041] 10. Main structure; 101. Vertical flow channel; 1011. Second abutment portion; 1012. First flow channel; 1013. Second flow channel; 102. Mounting seat; 1021. Through hole; 1022. Limiting portion; 11. First shell; 111. Groove; 112. First boss; 113. Second boss; 114. Second installation chamber; 115. Protective cover; 12. Second shell; 13. Sealing ring; 14. First installation chamber; 20. Float; 21. Excitation core; 22. Floating block; 221. Mounting groove; 23. Throttling gap; 24. First abutment portion; 241. First abutment surface; 30. Induction coil; 40. Circuit board; 41. Connecting wire; 50. Center axis. DETAILED DESCRIPTION
[0042] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0043] See also Figures 1 to 4 , Figure 1 The structure diagram of a float flow sensor according to an embodiment of the present application is shown. Figure 2 Shows Figure 1 A breakdown structure diagram of the structure shown. Figure 3 Shows Figure 1 Another perspective structural diagram of the structure shown. Figure 4 Shows Figure 3A cross-sectional structural diagram at AA. A float flow sensor provided in one embodiment of the present application comprises: a main structure 10, a float 20, an induction coil 30 and a circuit board 40. The main structure 10 is provided with a vertical flow channel 101. The float 20 is provided with an excitation core 21, and a throttling gap 23 is formed between the outer wall of the float 20 and the inner wall of the vertical flow channel 101. The float 20 can be movably arranged in the vertical flow channel 101, and the equilibrium position can be adjusted along the axial direction of the vertical flow channel 101 as the fluid flow in the vertical flow channel 101 changes. The induction coil 30 is arranged on the main structure 10 around the circumference of the vertical flow channel 101, and the induction coil 30 and the excitation core 21 form an inductor. The circuit board 40 is provided with a detection circuit, and the detection circuit is provided with a capacitor. The detection circuit is electrically connected to the induction coil 30, and the inductor and the capacitor form an LC oscillation circuit, which is also called a tuning circuit or a resonant circuit.
[0044] In the above-mentioned float flow sensor, when the fluid flow rate inside the vertical flow channel 101 changes, the float 20 adjusts its equilibrium position along the axial direction of the vertical flow channel 101, which can drive the excitation core 21 to adjust its position in the vertical channel accordingly. At this time, since the induction coil 30 is in a stationary state, the relative position of the excitation core 21 and the induction coil 30 along the axial direction changes, and then the inductance formed by the induction coil 30 and the excitation core 21 can be adjusted, so that the oscillation frequency of the LC oscillation circuit can be adjusted. By using, for example, a single-chip microcomputer to measure the oscillation frequency output by the circuit board 40, the size of the water flow corresponding to the oscillation frequency can be known. It can be seen that there is no need to set a rotating magnetic core rotor as in the related art, that is, there are no wearing parts, and the long-term use precision is more stable and the accuracy is better; in addition, the requirements for liquid cleanliness are not high. Even if there are foreign objects, as long as they are smaller than the narrow mouth, they can flow, and there is no need to worry about the winding rotor getting stuck, thereby reducing blockage and reducing costs.
[0045] It should be noted that when the fluid flow rate is different, the equilibrium position of the float 20 in the vertical flow channel 101 is different, that is, the position of the excitation core 21 in the vertical flow channel 101 is different, and the corresponding inductance is different, so that the oscillation frequency of the LC oscillation circuit is different. In this way, the corresponding fluid flow rate can be obtained according to the output oscillation frequency of the circuit board 40.
[0046] It should be noted that the fluid includes but is not limited to at least one or more combinations of liquid, gas, dust particles, etc. The fluid in this embodiment is specifically water, for example.
[0047] It should also be noted that the float 20 is in a balanced position when the fluid flows from bottom to top through the vertical flow channel 101, and the throttling gap 23 produces a throttling effect, so a static pressure difference is formed between the upper and lower ends of the float 20, causing the float 20 to be subjected to an upward driving force, which is balanced by the float 20's own gravity, buoyancy and fluid viscous friction, so that the float 20 is suspended in the vertical flow channel 101.
[0048] Among them, the gravity and buoyancy of the float 20 remain basically unchanged, while the fluid viscous friction force and static pressure difference force both increase with the increase of the fluid flow rate. Specifically, when the flow rate of the fluid increases, the force balance of the float 20 will be broken, the float 20 moves upward, and the throttling gap 23 becomes larger, so that the static pressure difference becomes smaller. When the forces are balanced again, the float 20 stops moving.
[0049] See also Figure 2 and Figure 4 In one embodiment, the float flow sensor further includes a central axis 50 passing through the vertical channel. The central axis 50 is connected to the main structure 10, and the float 20 is provided with an axial hole adapted to the central axis 50, through which the float 20 is movably sleeved on the central axis 50. In this way, the float 20 is subjected to the force of the fluid or driven by its own gravity, and moves up and down along the central axis 50 in the vertical channel, and the operation is stable, thereby improving the accuracy of the detection result.
[0050] See also Figure 2 and Figure 4 In one embodiment, the float 20 includes a float block 22. The float block 22 is provided with a mounting groove 221 adapted to the excitation core 21, and the excitation core 21 includes but is not limited to being embedded and fixed in the mounting groove 221, being bonded and fixed in the mounting groove 221, being clamped and fixed in the mounting groove 221, being interference-fitted with the mounting groove 221, being locked and fixed in the mounting groove 221 by an insulating fastener, or being integrally injection-molded with the float block 22.
[0051] See also Figures 4 to 6 , Figure 5 and Figure 6 They are shown respectively Figure 1 Two different perspectives of the structure shown. In one embodiment, at least one end of the vertical flow channel 101 is provided with a mounting seat 102. The central axis 50 is connected to the mounting seat 102, and at least one through hole 1021 connected to the vertical flow channel 101 is formed on the mounting seat 102. In this way, on the one hand, the mounting seat 102 supports the central axis 50; on the other hand, the fluid can pass through the through hole 1021 into the vertical flow channel 101 and pass out from the through hole 1021.
[0052] See also Figures 4 to 6In one embodiment, mounting seats 102 are respectively provided at opposite ends of the vertical flow channel 101, and opposite ends of the central shaft 50 are respectively connected to the two mounting seats 102. In this way, the central shaft 50 can be stably mounted, thereby improving the movement stability of the float 20 on the central shaft 50.
[0053] See also Figures 4 to 6 In one embodiment, the through holes 1021 are provided in a plurality and are sequentially arranged around the circumference of the central axis 50. In this way, the fluid can smoothly flow into the vertical flow channel 101 and flow out from the vertical flow channel 101.
[0054] See also Figure 4 In one embodiment, the mounting seat 102 at the top of the vertical flow channel 101 is provided with a limit portion 1022 extending toward the bottom of the vertical channel. When the float 20 and the limit portion 1022 abut against each other, the top surface height of the excitation core 21 is lower than or equal to the top surface height of the induction coil 30.
[0055] See also Figure 4 In one embodiment, the throttling gap 23 is arranged around the circumference of the float 20. When the float 20 moves toward the top of the vertical flow channel 101, the size of the throttling gap 23 gradually increases. In this way, when the flow rate of the fluid increases, the float 20 will move toward the top of the vertical flow channel 101, so that the position of the float 20 in the vertical flow channel 101 can be accurately adjusted, and a linear relationship can be established between the height position of the float 20 in the vertical flow channel 101 and the flow rate of the fluid, so that the flow rate of the fluid can be accurately known. In addition, since the throttling gap 23 is arranged around the circumference of the float 20 and is in a ring shape, the up and down movement stability of the float 20 is better under the drive of the fluid.
[0056] Of course, as some optional solutions, the throttling gap 23 can also be set in a non-annular shape, and for example, provided with multiple sections, and the multiple sections are arranged in sequence and spaced apart in the circumferential direction of the central axis 50.
[0057] See also Figure 2 and Figure 4In one embodiment, a first abutment portion 24 is provided around the outer wall of the float 20. The first abutment portion 24 is provided with a first abutment surface 241, and the first abutment surface 241 cooperates with the inner wall of the vertical flow channel 101 to form a throttling gap 23. The outer diameter of the first abutment surface 241 increases in the direction from the bottom end of the vertical flow channel 101 to the top end of the vertical flow channel 101. The inner diameter of the vertical flow channel 101 increases in the direction from the bottom end of the vertical flow channel 101 to the top end of the vertical flow channel 101. The angle formed by the first abutment surface 241 and the central axis Z of the vertical flow channel 101 is set to a first angle a, and the angle formed by the inner wall of the vertical flow channel 101 and the central axis Z of the vertical flow channel 101 is set to a second angle b, and the first angle a is greater than the second angle b. Thus, on the one hand, the throttling gap 23 formed by the first abutting surface 241 and the inner wall of the vertical flow channel 101 is correspondingly ring-shaped; on the other hand, when the float 20 moves along the axial direction of the vertical flow channel 101, the size of the throttling gap 23 can be flexibly adjusted.
[0058] See also Figures 7 to 10 , Figure 7 A structural diagram of a float flow sensor according to another embodiment of the present application is shown. Figure 8 Shows Figure 7 A breakdown structure diagram of the structure shown. Fig. 9 Shows Figure 7 Another perspective structural diagram of the structure shown. Fig.10 Shows Fig. 9 In another embodiment, the float 20 is arranged in a conical shape, and a second abutting portion 1011 is arranged around the inner wall of the vertical flow channel 101 , and the second abutting portion 1011 cooperates with the outer wall of the float 20 to form a throttling gap 23 .
[0059] See also Figure 8 and Fig.10 Specifically, the vertical flow channel 101 includes a first flow channel 1012 and a second flow channel 1013 that are interconnected. The inner diameter of the first flow channel 1012 is smaller than the inner diameter of the second flow channel 1013, and the butt joint between the first flow channel 1012 and the second flow channel 1013 is set as the second abutment portion 1011. A portion of the float 20 is inserted into the first flow channel 1012, and the other portion of the float 20 is set in the second flow channel 1013.
[0060] Among them, the main structure 10 has many specific structural forms and can be adjusted and set according to actual needs.
[0061] See also Figure 2 and Figure 4 or Figure 8 and Fig.10In one embodiment, the main structure 10 includes a first shell 11 and a second shell 12 that are detachably connected, and a sealing ring 13 connected between the first shell 11 and the second shell 12. The bottom end of the vertical flow channel 101 is formed on the first shell 11, and the top end of the vertical flow channel 101 is formed on the second shell 12. In this way, on the one hand, since the main structure 10 is set as a first shell 11 and a second shell 12 that are detachably connected, it is convenient to install the float 20 and the central axis 50 inside the vertical flow channel 101; on the other hand, the sealing ring 13 can ensure the sealing effect at the connection part of the first shell 11 and the second shell 12.
[0062] See also Figure 2 and Figure 4 In one embodiment, a first thread is disposed on the outer wall of the first shell 11, and a second thread adapted to the first thread is disposed on the inner wall of the second shell 12. Such a design can protect the induction coil 30 and facilitate assembly.
[0063] See also Figure 2 and Figure 4 Specifically, a groove 111 is provided at the top of the first shell 11 , and the sealing ring 13 is disposed in the groove 111 and is in sealing contact with the inner wall of the second shell 12 .
[0064] In addition, a first installation chamber 14 is formed between the outer wall of the first shell 11 and the inner wall of the second shell 12 and is arranged around the circumference of the first shell 11 . The induction coil 30 is arranged inside the first installation chamber 14 .
[0065] Specifically, a first boss 112 and a second boss 113 are arranged at intervals on the outer wall of the first shell 11. The first boss 112 and the second boss 113 are arranged around the circumference of the first shell 11. The first thread is arranged on the first boss 112. The first boss 112, the second boss 113, the first shell 11 and the second shell 12 are surrounded to form a first installation chamber 14.
[0066] In one embodiment, the induction coil 30 is closely wound on the outer wall of the first housing 11. In this way, the distance between the induction coil 30 and the float 20 is relatively small, and when the float 20 moves, the change value of the magnetic field is larger, and the detection effect is more sensitive and reliable.
[0067] In one embodiment, a second installation cavity 114 is provided on the outer wall of the first housing 11, and the circuit board 40 is installed inside the second installation cavity 114. The connecting end of the induction coil 30 passes through the first installation cavity 14 and the second installation cavity 114 in sequence and is connected to the circuit board 40. In this way, the circuit board 40 is easily installed, and the overall structure is more compact.
[0068] Specifically, the second installation cavity 114 is provided with a detachable protective cover 115, and the circuit board 40 can be taken out from the second installation cavity 114 by opening the protective cover 115. In addition, the circuit board 40 is provided with a connection line 41 extending through the protective cover 115 to the outside of the protective cover 115 or an interface for connecting with an external device.
[0069] See also Figure 2 and Figure 4 In one embodiment, a water heating device comprises the float flow sensor of any of the above embodiments.
[0070] In the above-mentioned hot water device, when the fluid flow rate inside the vertical flow channel 101 changes, the float 20 adjusts its equilibrium position along the axial direction of the vertical flow channel 101, which can drive the excitation core 21 to adjust its position in the vertical channel accordingly. At this time, since the induction coil 30 is in a stationary state, the relative position of the excitation core 21 and the induction coil 30 along the axial direction changes, and then the inductance formed by the induction coil 30 and the excitation core 21 can be adjusted, so that the oscillation frequency of the LC oscillation circuit can be adjusted. By using, for example, a single-chip microcomputer to measure the oscillation frequency output by the circuit board 40, the size of the water flow corresponding to the oscillation frequency can be known. It can be seen that there is no need to set a rotating magnetic core rotor as in the related art, that is, there are no wearing parts, and the long-term use precision is more stable and the accuracy is better; in addition, the requirements for liquid cleanliness are not high, even if there are foreign objects, as long as they are smaller than the narrow mouth, they can flow, and there is no need to worry about the winding rotor getting stuck, thereby reducing the blockage phenomenon and reducing costs.
[0071] It should be noted that the “first boss 112, the second boss 113” can be “a part of the first shell 11”, that is, the “first boss 112, the second boss 113” and the “other parts of the first shell 11” are manufactured as one piece; or it can be an independent component separable from the “other parts of the first shell 11”, that is, the “first boss 112, the second boss 113” can be manufactured independently and then combined with the “other parts of the first shell 11” into a whole.
[0072] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.
[0073] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0074] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.
[0075] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0076] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.
[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.
Claims
1. A float flow sensor, characterized in that: The float flow sensor comprises: A main structure (10), wherein the main structure (10) is provided with a vertical flow channel (101); a float (20), the float (20) being provided with an excitation core (21), a throttling gap (23) being formed between an outer wall of the float (20) and an inner wall of the vertical flow channel (101), the float (20) being movably arranged in the vertical flow channel (101) and adjusting a balance position along an axial direction of the vertical flow channel (101) as a flow rate of a fluid in the vertical flow channel (101) changes; an induction coil (30), the induction coil (30) being arranged on the main structure (10) in a circumferential direction around the vertical flow channel (101), the induction coil (30) and the excitation core (21) forming an inductor; and A circuit board (40), wherein the circuit board (40) is provided with a detection circuit, the detection circuit is provided with a capacitor, the detection circuit is electrically connected to the induction coil (30), and the inductor and the capacitor form an LC oscillation circuit.
2. The float flow sensor according to claim 1, characterized in that: The float flow sensor further comprises a central shaft (50) passing through the vertical channel, the central shaft (50) being connected to the main structure (10), and the float (20) being movably sleeved on the central shaft (50).
3. The float flow sensor according to claim 2, characterized in that: At least one end of the vertical flow channel (101) is provided with a mounting seat (102), the central axis (50) is connected to the mounting seat (102), and at least one through hole (1021) connected to the vertical flow channel (101) is formed on the mounting seat (102).
4. The float flow sensor according to claim 3, characterized in that: The mounting seats (102) are respectively arranged at opposite ends of the vertical flow channel (101), and the opposite ends of the central axis (50) are respectively connected to the two mounting seats (102); the through holes (1021) are provided in plurality and are arranged in sequence around the circumference of the central axis (50); the mounting seat (102) located at the top of the vertical flow channel (101) is provided with a limiting portion (1022) extending toward the bottom of the vertical channel, and when the float (20) and the limiting portion (1022) are in contact with each other, the top surface height of the excitation core (21) is lower than or equal to the top surface height of the induction coil (30).
5. The float flow sensor according to claim 1, characterized in that: The throttling gap (23) is arranged around the circumference of the float (20); when the float (20) moves toward the top of the vertical flow channel (101), the size of the throttling gap (23) gradually increases.
6. The float flow sensor according to claim 5, characterized in that: A first abutment portion (24) is provided around the outer wall of the float (20), and the first abutment portion (24) is provided with a first abutment surface (241), and the first abutment surface (241) cooperates with the inner wall of the vertical flow channel (101) to form the throttling gap (23); the outer diameter of the first abutment surface (241) increases in a direction from the bottom end of the vertical flow channel (101) to the top end of the vertical flow channel (101); the inner diameter of the vertical flow channel (101) increases in a direction from the bottom end of the vertical flow channel (101) to the top end of the vertical flow channel (101); the angle formed by the first abutment surface (241) and the central axis of the vertical flow channel (101) is set to a first angle, and the angle formed by the inner wall of the vertical flow channel (101) and the central axis of the vertical flow channel (101) is set to a second angle, and the first angle is greater than the second angle.
7. The float flow sensor according to claim 5, characterized in that: The float (20) is arranged in a conical shape, and a second abutment portion (1011) is arranged around the inner wall of the vertical flow channel (101), and the second abutment portion (1011) cooperates with the outer wall surface of the float (20) to form the throttling gap (23).
8. The float flow sensor according to claim 1, characterized in that: The main structure (10) comprises a first shell (11) and a second shell (12) which are detachably connected, and a sealing ring (13) connected between the first shell (11) and the second shell (12); the bottom end of the vertical flow channel (101) is formed on the first shell (11), and the top end of the vertical flow channel (101) is formed on the second shell (12).
9. The float flow sensor according to claim 8, characterized in that: The outer wall of the first shell (11) is provided with a first thread, and the inner wall of the second shell (12) is provided with a second thread adapted to the first thread; A first installation chamber (14) is formed between the outer wall of the first shell (11) and the inner wall of the second shell (12) and is arranged circumferentially around the first shell (11), and the induction coil (30) is arranged inside the first installation chamber (14); The induction coil (30) is tightly wound on the outer wall of the first shell (11); A second installation chamber (114) is provided on the outer wall of the first shell (11), the circuit board (40) is installed inside the second installation chamber (114), and the connection end of the induction coil (30) passes through the first installation chamber (14) and the second installation chamber (114) in sequence and is connected to the circuit board (40).
10. A water heating device, characterized in that: The water heating device comprises a float flow sensor as claimed in any one of claims 1 to 9.