Water flow sensor assembly and water heater

Abstract

The utility model discloses water flow sensor assembly and water heater belong to the technical field of home appliances, and the utility model discloses water flow sensor assembly and water heater can adjust the flow of water outlet end according to the water flow pressure in the pipe body, ensure that the water flow in the pipe body is in stable state, avoid adjusting the water flow in the pipe body frequently and meaninglessly because of accidental flow fluctuation, prolong the service life of water flow sensor assembly, ensure that the water temperature and flow at the water outlet joint all meet the set value, and the use experience is better.

Description

Technical Field

[0001] This utility model relates to the field of home appliance technology, and in particular to a water flow sensor assembly and a water heater. Background Technology

[0002] A water heater is a household appliance that heats cold water to a set temperature, primarily for drinking, bathing, or housework. The device in a water heater that heats the cold water can be a burner that generates heat through gas combustion, or an electric heating element that generates heat using electricity. Other devices that generate heat and exchange heat with the cold water are also acceptable.

[0003] Regardless of the method used to generate heat, the amount of water that can be heated per unit time is limited. If water is continuously flowing out of the water heater's outlet and continuously flowing in, the heat generated by the heating element will be insufficient to heat the cold water to the set temperature, resulting in an unsuitable outlet water temperature. To ensure the outlet water temperature meets the standard, some existing water heaters are equipped with a water flow sensor on the inlet pipe, which can detect the inlet water flow rate. The control device determines whether the inlet water flow needs to be adjusted based on the outlet water temperature measured by the temperature sensor, and then determines whether the adjustment of the inlet water flow has been completed based on the monitoring results of the water flow sensor.

[0004] Existing water heaters have several drawbacks: due to water pressure and other factors, water flow fluctuations sometimes occur in the inlet pipe, resulting in short periods of high flow velocity. If the flow sensor sends high-velocity readings to the control device, the device may incorrectly determine that the current flow velocity is too high and reduce the inlet flow rate. Once the flow fluctuation ends, the flow sensor sends low-velocity readings back to the control device, which then needs to increase the flow rate based on the new readings. This adjustment is meaningless. Frequent and meaningless flow rate adjustments can lead to fluctuations in water temperature and affect water output, resulting in a poor user experience. Furthermore, it shortens the lifespan of components such as the flow control valve, increasing operating costs. Utility Model Content

[0005] The purpose of this invention is to propose a water flow sensor component and a water heater, which solves the problem of unstable water temperature in existing water heaters and provides a better user experience.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A water flow sensor assembly includes: a pipe body with a through hole on its side wall, one end of the pipe body forming an inlet end and the other end forming an outlet end, with a main water flow channel and a bypass channel arranged in parallel between the inlet end and the outlet end; a rotating component disposed in the pipe body, the rotating component being able to rotate under the impact of water flow; a speed measuring device for measuring the rotational speed of the rotating component; a bypass switch device extending at least partially through the through hole into the pipe body, the bypass switch device being used to open or close the bypass channel; and a flow stabilizing device disposed in the pipe body, the flow stabilizing device being used to adjust the flow rate at the outlet end according to the water flow pressure in the pipe body.

[0008] In one preferred embodiment, the rotating component, the bypass switch device, and the flow stabilizing device are arranged sequentially from the water inlet to the water outlet.

[0009] In one preferred embodiment, the current stabilizing device includes a first housing, a second housing, a current stabilizing element, and an elastic element. One end of the current stabilizing element abuts against one of the first housing and the second housing, and the other end of the current stabilizing element is connected to form a gap between the other of the first housing and the second housing. The elastic element is disposed between the other of the first housing and the second housing and the current stabilizing element, and the elastic element can adjust the distance between the other of the first housing and the second housing and the current stabilizing element by elastic deformation.

[0010] In one preferred embodiment, the elastic element is a spring, and the other of the first housing and the second housing further includes a flow-stabilizing top plate. The flow-stabilizing top plate is provided with an annular limiting groove. One end of the spring abuts against the flow-stabilizing element, and the other end of the spring is embedded in the annular limiting groove.

[0011] In one preferred embodiment, the pipe body further includes a T-shaped branch pipe extending radially from the through hole, the end of the bypass switch device passing through the T-shaped branch pipe and movable along the axis of the T-shaped branch pipe; a radially extending protrusion is provided in the pipe body, and the bypass channel is formed between the protrusion and the end of the bypass switch device.

[0012] In one preferred embodiment, a water passage is formed between the protrusion and the edge of the through hole, and the main water flow channel is connected to the side channel through the water passage.

[0013] In one preferred embodiment, the bypass switching device includes a solenoid valve and a seal. The solenoid valve drives the seal to move along the axis of the T-shaped branch pipe. When the seal abuts against the protrusion, the bypass channel is cut off; when the seal moves away from the protrusion, the bypass channel is opened.

[0014] In one preferred embodiment, the speed measuring device includes a signal terminal, which can convert the rotational speed of the rotating component into a current signal, and the signal terminal can send the current signal.

[0015] In one preferred embodiment, the rotating component is a turbine, and the axis of the turbine is aligned with the direction of the water flow.

[0016] On the other hand, the present invention adopts the following technical solution:

[0017] A water heater includes a housing assembly and a heat exchanger disposed in the housing assembly. The housing assembly includes an inlet connector and an outlet connector. The water heater also includes the aforementioned water flow sensor assembly. The inlet end of the pipe is connected to the inlet connector, the outlet end of the pipe is connected to the heat exchanger, and the heat exchanger is connected to the outlet connector.

[0018] The water flow sensor assembly disclosed in this utility model includes a flow stabilizing device that can adjust the flow rate at the outlet end according to the water pressure in the pipe, ensuring that the water flow in the pipe is in a stable state. This avoids frequent and meaningless adjustments to the water flow in the pipe due to occasional flow fluctuations, extends the service life of the water flow sensor assembly, and reduces the operating cost of the water heater. It solves the problem of unstable water volume and substandard outlet water temperature caused by frequent and meaningless adjustments to the water flow in the pipe of existing water heaters, ensuring that the water temperature and flow rate at the outlet joint meet the set values, resulting in a better user experience.

[0019] The water heater disclosed in this utility model includes the above-mentioned water flow sensor assembly. The flow stabilizing device can keep the water flow in the pipe in a stable state. Occasional flow fluctuations will not affect the normal operation of the water heater. The water supply and outlet temperature are more stable, the user experience is better, the product is more competitive, and the operating cost is low. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the water heater provided in a specific embodiment of this utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the water flow sensor assembly provided in a specific embodiment of this utility model;

[0022] Figure 3 This is a cross-sectional view of the water flow sensor assembly provided in a specific embodiment of this utility model;

[0023] Figure 4 This is a cross-sectional view of the water flow sensor assembly provided in a specific embodiment of the present invention when the bypass channel is cut off;

[0024] Figure 5This is a cross-sectional view of the water flow sensor assembly when the bypass channel is open, according to a specific embodiment of this utility model.

[0025] Figure 6 This is an exploded view of the flow stabilizing device provided in a specific embodiment of this utility model.

[0026] In the picture:

[0027] 1. Pipe body; 2. Rotating component; 3. Speed ​​measuring device; 4. Bypass switch device; 5. Flow stabilizing device; 11. Through hole; 12. Water inlet end; 13. Water outlet end; 14. Main water flow channel; 15. Bypass channel; 16. T-shaped branch pipe; 17. Protrusion; 18. Water passage hole; 31. Signal terminal; 41. Solenoid valve; 42. Sealing component; 51. First housing; 52. Second housing; 53. Flow stabilizing component; 54. Elastic component; 55. Flow stabilizing top plate; 100. Water flow sensor assembly; 200. Housing assembly; 201. Water inlet connector; 202. Water outlet connector; 300. Heat exchanger; 400. Main controller; 500. Fan assembly; 551. Annular limiting groove; 600. Smoke hood; 700. Burner; 800. Air inlet interface; 900. Temperature sensor. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] This embodiment discloses a water flow sensor assembly and a water heater, which can heat low-temperature water to a set temperature by burning gas and provide hot water to the user. Figure 1As shown, the water heater includes a water flow sensor assembly 100, a housing assembly 200, a heat exchanger 300, a main controller 400, a fan assembly 500, a fume hood 600, a burner 700, an air inlet 800, and a temperature sensor 900. The water flow sensor assembly 100, heat exchanger 300, main controller 400, fan assembly 500, fume hood 600, burner 700, and temperature sensor 900 are all housed within the housing assembly 200. The air inlet 800 is located on the housing assembly 200 and connected to the air supply device. The housing assembly 200 also has a water inlet connector 201 and a water outlet connector 202. The water inlet connector 201 connects to the water flow sensor assembly 100, the water flow sensor assembly 100 connects to the heat exchanger 300, and the heat exchanger 300 connects to the water outlet connector 202, forming a water flow channel.

[0035] In this embodiment, the main controller 400 can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control devices such as the water flow sensor assembly 100, the fan assembly 500, the burner 700, and the temperature sensor 900 to perform their functions.

[0036] like Figures 1 to 5 As shown, the water flow sensor assembly 100 includes a pipe body 1, a rotating component 2, a speed measuring device 3, a bypass switch device 4, and a flow stabilizing device 5. The rotating component 2 and the flow stabilizing device 5 are respectively disposed in the pipe body 1. One end of the pipe body 1 forms a water inlet 12, which is connected to a water inlet connector 201; the other end of the pipe body 1 forms a water outlet 13, which is connected to a heat exchanger 300. The rotating component 2 is disposed in the pipe body 1 and can rotate under the impact of the water flow. The speed measuring device 3 is used to measure the rotational speed of the rotating component 2.

[0037] A through hole 11 is provided on the side wall of the pipe body 1, forming a main water flow channel 14 and a bypass channel 15 arranged in parallel between the water inlet end 12 and the water outlet end 13. A bypass channel switch device 4 for opening or cutting off the bypass channel 15 extends into the pipe body 1 at least partially through the through hole 11.

[0038] The flow stabilizing device 5 can adjust the flow rate at the outlet 13 according to the water pressure in the pipe body 1, ensuring that the water flow in the pipe body 1 is in a stable state. This prevents occasional flow fluctuations from being fed back to the main controller 400 through the speed measuring device 3, thus preventing the main controller 400 from frequently and meaninglessly adjusting the water flow in the pipe body 1 due to occasional flow fluctuations. This extends the service life of the water flow sensor assembly 100 and reduces the operating cost of the water heater. It also prevents the water volume entering the heat exchanger 300 from being unstable and the water temperature of the water heater from failing to meet the standard due to frequent and meaningless adjustments to the water flow in the pipe body 1. This ensures that the water temperature and flow rate at the outlet connector 202 meet the set values, resulting in a better user experience.

[0039] During the operation of the water heater, the speed measuring device 3 of the water flow sensor assembly 100 can monitor the water flow based on the rotating part 2, and the bypass switch device 4 can adjust and control the water flow by opening or closing the bypass channel 15, so as to ensure that the water temperature of the water heater is constant and the water output meets the user's needs.

[0040] The method for controlling water temperature is as follows: The main controller 400 compares the user-set temperature TA with the actual outlet water temperature TB measured by the temperature sensor 900. When the temperature difference between the set temperature TA and the actual outlet water temperature TB is within the set range, the main controller 400 maintains monitoring and will not send an action command to the water flow sensor assembly 100. When the actual outlet water temperature TB is lower than the set temperature TA and the difference between the two exceeds the set range, the main controller 400 will control the bypass switch device 4 to cut off the bypass channel 15, reducing the amount of water supplied to the heat exchanger 300 through the pipe body 1, so that the heat generated by the burner 700 is sufficient to heat the low-temperature water in the heat exchanger 300 to the set temperature, ensuring a constant outlet water temperature. The set range for the temperature difference between the actual outlet water temperature TB and the set temperature TA can be, but is not limited to, 3℃.

[0041] The specific structure of the water flow sensor assembly 100 is not limited. In this embodiment, a rotating component 2, a bypass switch device 4, and a flow stabilizing device 5 are sequentially arranged from the inlet end 12 to the outlet end 13 (i.e., the water flow direction). In the pipe body 1 where the rotating component 2 is located, only the main water flow channel 14 exists. All water entering the pipe body 1 flows through the rotating component 2, ensuring accurate velocity measurement. In the pipe body 1 where the bypass switch device 4 is located, the main water flow channel 14 and the bypass channel 15 are arranged parallel to each other along the water flow direction. When the bypass channel 15 is open, part of the water passing through the rotating component 2 enters the main water flow channel 14, and the other part enters the bypass channel 15; when the bypass channel 15 is closed, all the water passing through the rotating component 2 enters the main water flow channel 14. In the pipe body 1 where the flow stabilizing device 5 is located, only the main water flow channel 14 exists. All water in the pipe body 1 must pass through the flow stabilizing device 5 before flowing out, ensuring a stable water flow rate from the pipe body 1.

[0042] Figure 4As shown, the bypass channel 15 is in a cut-off state. At this time, only the main water flow channel 14 supplies water, and the pipe body 1 is in a low flow state, which can meet the user's demand for high-temperature water.

[0043] Figure 5 As shown, the bypass channel 15 is in an open state. The water flow passing through the rotating part 2 is divided into two paths. One path flows directly through the main water flow channel 14 to the flow stabilizing device 5, while the other path flows through the bypass channel 15 into the main water flow channel 14 and then both flow to the flow stabilizing device 5. At this time, the pipe body 1 is in a high-flow state, which can meet the user's demand for high-flow water.

[0044] The specific structure of the current stabilizing device 5 is not limited. In this embodiment, for example... Figure 6 As shown, the flow stabilizing device 5 includes a first housing 51, a second housing 52, a flow stabilizing element 53, and an elastic element 54. After the first housing 51 and the second housing 52 are fastened together, a cavity is formed inside, and the flow stabilizing element 53 and the elastic element 54 are disposed in the cavity.

[0045] One end of the flow stabilizer 53 abuts against one of the first housing 51 and the second housing 52, and the other end of the flow stabilizer 53 is connected to the other of the first housing 51 and the second housing 52 to form a gap. An elastic member 54 is disposed between the other of the first housing 51 and the second housing 52 and the flow stabilizer 53. The elastic member 54 can adjust the distance between the other of the first housing 51 and the second housing 52 and the flow stabilizer 53 by elastic deformation.

[0046] In this embodiment, the first housing 51 is located upstream of the second housing 52. When the water flow sensor assembly 100 is working, the water flow in the pipe 1 first contacts the first housing 51, applying water pressure to it. Under the action of water pressure, the first housing 51 and the flow stabilizer 53 move together toward the second housing 52, and the elastic member 54 is compressed and deformed. After the flow stabilizer 53 approaches the second housing 52, the gap between them for water flow narrows, the water flow decreases, and the purpose of controlling the water flow is achieved. It can be understood that by adjusting the elasticity of the elastic member 54, the maximum flow rate and / or minimum water flow rate allowed by the flow stabilizing device 5 can be adjusted, making it widely applicable.

[0047] Based on the above structure, the elastic element 54 is a spring, with one end of the spring abutting against the flow stabilizer 53. The other of the first housing 51 and the second housing 52 also includes a flow stabilizer top plate 55, which is provided with an annular limiting groove 551. The other end of the spring is embedded in the annular limiting groove 551 to ensure that the spring is more stable after installation and to prevent the spring from displacing radially.

[0048] The specific principle by which the bypass switch device 4 opens and closes the bypass channel 15 is not limited. In this embodiment, for example... Figures 1 to 5As shown, the pipe body 1 also includes a T-shaped branch pipe 16 extending radially from the through hole 11. The end of the bypass switch device 4 passes through the T-shaped branch pipe 16 and can move along the axis of the T-shaped branch pipe 16. A radially extending protrusion 17 is provided in the pipe body 1, and a bypass channel 15 is formed between the protrusion 17 and the end of the bypass switch device 4. When the end of the bypass switch device 4 abuts against the protrusion 17, the bypass channel 15 is cut off; when the end of the bypass switch device 4 moves away from the protrusion 17, the bypass channel 15 is opened.

[0049] The specific structure of the bypass switch device 4 is not limited. In this embodiment, the bypass switch device 4 includes a solenoid valve 41 and a seal 42. The solenoid valve 41 can drive the seal 42 to move along the axis of the T-shaped branch pipe 16. The seal 42 is made of a flexible material such as rubber. When the solenoid valve 41 drives the seal 42 to abut against the protrusion 17, the bypass channel 15 is cut off, and the water flow in the pipe body 1 cannot enter the bypass channel 15, resulting in a small flow rate, which can meet the user's demand for high-temperature water. When the solenoid valve 41 drives the seal 42 away from the protrusion 17, the bypass channel 15 is opened, and part of the water in the pipe body 1 enters the main water flow channel 14, while the other part enters the bypass channel 15. The water in the bypass channel 15 eventually flows into the main water flow channel 14, resulting in a large flow rate, which can meet the user's demand for a large flow rate of water.

[0050] The specific structure for achieving "another portion of the water in pipe 1 entering the bypass channel 15" is not limited. In this embodiment, a water passage 18 is provided between the protrusion 17 and the edge of the through hole 11, and the main water flow channel 14 is connected to the bypass channel 15 through the water passage 18. When the solenoid valve 41 drives the seal 42 to abut against the protrusion 17, the bypass channel 15 is cut off, and the space between the water passage 18 and the protrusion 17 is filled with water. Water in pipe 1 cannot continue to enter the space between the water passage 18 and the protrusion 17, ensuring that water in pipe 1 can only flow through the main water flow channel 14.

[0051] Based on the above structure, the speed measuring device 3 includes a Hall sensor and a signal terminal 31. The Hall sensor can record the number of rotations of the rotating component 2 per unit time (i.e., the rotational speed of the rotating component 2). Specifically, the water flow in the pipe 1 drives the rotating component 2 to rotate. The Hall sensor converts the number of rotations of the rotating component 2 into a current signal. The signal terminal 31 can send the current signal to the main controller 400. The main controller 400 monitors the water flow rate based on the current signal.

[0052] The specific structure of the rotating component 2 is not limited; any existing device capable of rotating under the impact of water flow is acceptable. In this embodiment, the rotating component 2 is a turbine. The turbine includes blades and a shaft, with the axis of the shaft aligned with the direction of the water flow. When water flows through the turbine, the blades rotate around the shaft, and the speed measuring device 3 senses and records the rotational speed of the blades.

[0053] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A water flow sensor assembly, characterized in that, include: The pipe body (1) has a through hole (11) on its side wall. One end of the pipe body (1) forms a water inlet (12), and the other end of the pipe body (1) forms a water outlet (13). A main water flow channel (14) and a bypass channel (15) are formed in parallel between the water inlet (12) and the water outlet (13). A rotating component (2) is disposed in the pipe body (1), and the rotating component (2) can rotate under the impact of water flow; Speed ​​measuring device (3) is used to measure the rotational speed of the rotating part (2); A bypass switch device (4), extending at least partially through the through-hole (11) into the tube body (1), the bypass switch device (4) being used to open or close the bypass channel (15); and, A flow stabilizing device (5) is installed in the pipe body (1). The flow stabilizing device (5) is used to adjust the flow rate of the outlet end (13) according to the water pressure in the pipe body (1).

2. The water flow sensor assembly according to claim 1, characterized in that, The rotating component (2), the bypass switch device (4), and the flow stabilizing device (5) are arranged sequentially from the water inlet end (12) to the water outlet end (13).

3. The water flow sensor assembly according to claim 1, characterized in that, The current stabilizing device (5) includes a first housing (51), a second housing (52), a current stabilizing element (53), and an elastic element (54). One end of the current stabilizing element (53) abuts against one of the first housing (51) and the second housing (52), and the other end of the current stabilizing element (53) is connected to form a gap between the other of the first housing (51) and the second housing (52). The elastic element (54) is disposed between the other of the first housing (51) and the second housing (52) and the current stabilizing element (53). The elastic element (54) can adjust the distance between the other of the first housing (51) and the second housing (52) and the current stabilizing element (53) by undergoing elastic deformation.

4. The water flow sensor assembly according to claim 3, characterized in that, The elastic element (54) is a spring. The other of the first housing (51) and the second housing (52) also includes a flow stabilizing top plate (55). The flow stabilizing top plate (55) is provided with an annular limiting groove (551). One end of the spring abuts against the flow stabilizing element (53), and the other end of the spring is embedded in the annular limiting groove (551).

5. The water flow sensor assembly according to any one of claims 1 to 4, characterized in that, The pipe body (1) also includes a T-shaped branch pipe (16) extending radially from the through hole (11), the end of the bypass switch device (4) passing through the T-shaped branch pipe (16) and being movable along the axis of the T-shaped branch pipe (16); a radially extending protrusion (17) is provided in the pipe body (1), and the bypass channel (15) is formed between the protrusion (17) and the end of the bypass switch device (4).

6. The water flow sensor assembly according to claim 5, characterized in that, A water passage (18) is provided between the protrusion (17) and the edge of the through hole (11), and the main water flow channel (14) is connected to the side channel (15) through the water passage (18).

7. The water flow sensor assembly according to claim 5, characterized in that, The bypass switch device (4) includes a solenoid valve (41) and a seal (42). The solenoid valve (41) is used to drive the seal (42) to move along the axis of the T-shaped branch pipe (16). When the seal (42) abuts against the protrusion (17), the bypass channel (15) is cut off; when the seal (42) moves away from the protrusion (17), the bypass channel (15) is opened.

8. The water flow sensor assembly according to any one of claims 1 to 4, characterized in that, The speed measuring device (3) includes a signal terminal (31), which can convert the rotation speed of the rotating part (2) into a current signal, and the signal terminal (31) can send the current signal.

9. The water flow sensor assembly according to any one of claims 1 to 4, characterized in that, The rotating component (2) is a turbine, and the axis of the turbine is aligned with the direction of the water flow.

10. A water heater, comprising a housing assembly (200) and a heat exchanger (300) disposed in the housing assembly (200), the housing assembly (200) including an inlet connector (201) and an outlet connector (202), characterized in that, The water heater further includes a water flow sensor assembly (100) as described in any one of claims 1 to 9, with the inlet end (12) of the pipe body (1) connected to the inlet connector (201), the outlet end (13) of the pipe body (1) connected to the heat exchanger (300), and the heat exchanger (300) connected to the outlet connector (202).

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