Water flow sensor, water inlet and outlet connector device, and water heater

Abstract

A water flow sensor, a water inlet and outlet connector device, and a water heater, belonging to the technical field of electrical apparatuses. The water flow sensor comprises a main body part having a water inlet connector and a water outlet connector, at least part of the structures of the water inlet connector and the water outlet connector being configured differently.

Description

Water flow sensor, water inlet and outlet joint device and water heater

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number: 202322202124.5 and application date of August 15, 2023, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to the field of electrical equipment, and in particular to a water flow sensor, a water inlet and outlet joint device, and a water heater. Background Art

[0004] A water flow sensor refers to a water flow sensing instrument that outputs a pulse signal or current, voltage or other signals by sensing the water flow. The water inlet and outlet joints of existing water flow sensors have the same structure. An arrow mark is usually set on the main body of the water flow sensor to identify the installation direction. However, the arrow mark is not obvious. In installation situations with poor lighting or limited installation space, the water inlet and outlet joints of the water flow sensor still have the problem of being installed in the wrong direction.

[0005] Summary of the Invention

[0006] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a water flow sensor and energy storage device to address the problem in the prior art that the arrow mark provided on the main body of the water flow sensor is not clear, and the water inlet and outlet connectors of the water flow sensor may be installed in the wrong direction in installation environments with poor lighting.

[0007] In a first aspect, the present application provides a water flow sensor, comprising:

[0008] The main body has a water inlet joint and a water outlet joint, and at least part of the structures of the water inlet joint and the water outlet joint are arranged differently.

[0009] According to the water flow sensor of the present application, by setting at least part of the structure of the water inlet joint and the water outlet joint differently, the water inlet joint and the water outlet joint have more obvious differences. Under the premise of ensuring the normal use of the water inlet joint and the water outlet joint, it can avoid the water inlet joint and the water outlet joint being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, thereby improving the assembly accuracy of the water flow sensor, greatly saving installation time and improving installation efficiency.

[0010] According to one embodiment of the present application, the water inlet connector and the water outlet connector are both provided with external threads or internal threads, and the geometric parameters of the external threads or internal threads of the water inlet connector and the external threads or internal threads of the water outlet connector are at least partially different.

[0011] According to an embodiment of the present application, the water inlet connector and the water outlet connector are both provided with external threads or internal threads, and the external threads or internal threads of the water inlet connector have different thread profiles from those of the external threads or internal threads of the water outlet connector.

[0012] According to one embodiment of the present application, one of the water inlet joint and the water outlet joint is provided with an external thread or an internal thread, and the other is provided with a union nut assembly.

[0013] According to one embodiment of the present application, one of the water inlet joint and the water outlet joint is provided with a union nut assembly, and the other is provided with a quick-connect joint.

[0014] According to one embodiment of the present application, the union nut assembly includes:

[0015] a connecting sleeve connected to one of the water inlet connector and the water outlet connector;

[0016] The nut can be rotatably sleeved on the connecting sleeve along its axis, and the nut is used for threaded connection with the water inlet pipe or the water outlet pipe.

[0017] According to one embodiment of the present application, one of the water inlet connector and the water outlet connector is provided with an external thread or an internal thread, and the other is provided with a quick-connect connector.

[0018] According to one embodiment of the present application, one of the water inlet connector and the water outlet connector is provided with an external thread, and the other is provided with an internal thread.

[0019] In a second aspect, the present application provides a water inlet and outlet joint device, which includes: a water flow sensor as described in any one of the above items.

[0020] According to the water inlet and outlet joint device of the present application, by setting the above-mentioned water flow sensor, the water inlet joint and the water outlet joint have a more obvious difference. Under the premise of ensuring the normal use of the water flow sensor, it can avoid the water inlet joint and the water outlet joint being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, and can improve the assembly accuracy of the water inlet and outlet joint device, greatly save installation time, and improve installation efficiency.

[0021] In a third aspect, the present application provides a water heater, which includes: the above-mentioned water inlet and outlet joint device.

[0022] According to the water heater of the present application, by setting the above-mentioned water inlet and outlet joint device, under the premise of ensuring the normal use of the water flow sensor, it can avoid the water flow sensor being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, and can improve the assembly accuracy of the water inlet and outlet joint device, greatly saving installation time and improving installation efficiency.

[0023] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0025] FIG1 is a schematic diagram of the structure of a water flow sensor according to an embodiment of the present application;

[0026] FIG2 is a second structural diagram of a water flow sensor provided in an embodiment of the present application;

[0027] FIG3 is a third structural diagram of a water flow sensor provided in an embodiment of the present application;

[0028] FIG4 is a fourth structural schematic diagram of the water flow sensor provided in an embodiment of the present application.

[0029] Reference numerals: water flow sensor 100 ; main body 110 , water inlet connector 111 , water outlet connector 112 , cylinder 113 . DETAILED DESCRIPTION

[0030] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0031] The present application discloses a water flow sensor.

[0032] The water flow sensor according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 4 .

[0033] As shown in FIG. 1 , the water flow sensor 100 includes a main body 110 .

[0034] The main body 110 has a water inlet joint 111 and a water outlet joint 112. The main body 110 can be hollow inside to form a water guide cavity. There are water guide holes at both ends of the water guide cavity. The water guide holes can be connected to the water inlet joint 111 and the water outlet joint 112, and the axis of the water guide hole is horizontal to the direction of water flow through the water guide cavity, so that the water flow can flow smoothly from the water inlet joint 111 and the water outlet joint 112, ensuring that the basic functions of the water flow sensor are complete.

[0035] When installing the water flow sensor, it is necessary to distinguish the water inlet direction and the water outlet direction. As shown in Figures 1 to 4, at least part of the structure of the water inlet connector 111 and the water outlet connector 112 is differently arranged, so that the water inlet connector 111 and the water outlet connector 112 have a relatively obvious difference, so that the installer can quickly identify the water inlet connector 111 and the water outlet connector 112. Under the premise of ensuring the normal use of the water inlet connector 111 and the water outlet connector 112, the wrong direction of the water inlet connector 111 and the water outlet connector 112 caused by poor light in the installation environment or limited installation space can be avoided, which can improve the assembly accuracy of the water flow sensor, greatly save installation time, and improve installation efficiency.

[0036] It is understandable that the water inlet connector 111 and the water outlet connector 112 may also have all structures differently set, so that the difference between the water inlet connector 111 and the water outlet connector 112 is more obvious, and this application does not make any specific limitations on this.

[0037] In one embodiment, the water guiding chamber may be provided with a through hole that passes through the upper wall of the main body 110. The axis of the through hole may be perpendicular to the direction of water flow through the water guiding chamber. A cylinder 113 may be provided on the through hole. The cylinder 113 may be integrally formed with the main body 110 by injection molding, so that the connection between the cylinder 113 and the main body 110 can be stable; an exhaust valve may be provided on the top plate of the cylinder 113. The exhaust valve serves as a device for quickly removing gas from the pipeline. It can relieve pressure in time when the pressure in the main body 110 is high, thereby improving the efficiency of water conveying in the water guiding chamber and protecting the main body 110 from deformation and rupture, so that the main body 110 can operate safely.

[0038] It is understandable that the main body 110 can be made of a variety of materials. For example, in one embodiment, the main body 110 can be made of stainless steel or metal, which can improve the overall strength of the main body 110; in other embodiments, the main body 110 can be made of plastic or rubber, which can save the production cost of the main body 110; the materials of the water inlet joint 111 and the water outlet joint 112 are similar, and this application does not make any specific restrictions on this.

[0039] According to the water flow sensor of the present application, by setting at least part of the structure of the water inlet connector 111 and the water outlet connector 112 differently, the water inlet connector 111 and the water outlet connector 112 have relatively obvious differences. Under the premise of ensuring the normal use of the water inlet connector 111 and the water outlet connector 112, it can avoid the water inlet connector 111 and the water outlet connector 112 being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, thereby improving the assembly accuracy of the water flow sensor, greatly saving installation time, and improving installation efficiency.

[0040] In some embodiments, as shown in Figure 1, the water inlet connector 111 and the water outlet connector 112 are both provided with external threads or internal threads, and the geometric parameters of the external threads or internal threads of the water inlet connector 111 corresponding to the external threads or internal threads of the water outlet connector 112 are at least partially different, so that the external threads or internal threads of the water inlet connector 111 and the corresponding external threads or internal threads of the water outlet connector 112 have relatively obvious differences in shape or size. On the premise of ensuring the normal use of the water inlet connector 111 and the water outlet connector 112, the installer can quickly identify the water inlet connector 111 and the water outlet connector 112, which can improve the installation efficiency.

[0041] It should be noted that the geometric parameters of the thread include the thread profile angle, thread diameter, number of thread turns, thread hand direction, thread pitch and lead, and thread lead angle, etc. There are many ways to set the geometric parameters of the thread at least partially differently. This application uses the thread diameter, number of thread turns, and thread hand direction as examples for explanation:

[0042] For one, the diameter of the threads can be different.

[0043] The diameter of the thread includes major diameter, minor diameter and mean diameter. The nominal diameter is used to represent the thread. The nominal diameter represents the size of the thread diameter. The thread diameter of the water inlet connector 111 can be larger than the thread diameter of the water outlet connector 112, or the thread diameter of the water inlet connector 111 can be smaller than the thread diameter of the water outlet connector 112, so that the water inlet connector 111 and the water outlet connector 112 have a more obvious difference in size, which is convenient for the installer to identify.

[0044] Second, the number of threads can be different.

[0045] The number of threads refers to the number of threads formed on the same cylindrical surface, which can be divided into single-thread threads and double-thread threads. The water inlet joint 111 can be set to a single-thread thread, and the water outlet joint 112 can be set to a double-thread thread; or the water inlet joint 111 can be set to a double-thread thread, and the water outlet joint 112 can be set to a single-thread thread, so that the water inlet joint 111 and the water outlet joint 112 have a more obvious difference in shape.

[0046] Third, the direction of thread rotation can be different.

[0047] Threads can be divided into left-hand threads and right-hand threads according to the direction of screwing. Right-hand threads conform to the right-hand rule, that is, when the right hand is clenched into a fist, the right thumb points in the direction of movement of the screw part, and the other four fingers point in the direction of rotation of the screw part. The difference between left-hand threads and right-hand threads can be perceived by touch, which is also convenient for installers to identify.

[0048] It should be noted that the threads distributed on the outer surface of the mother body are called external threads (also called male threads), and the threads distributed on the inner surface of the mother body are called internal threads (also called female threads); the threads formed on the cylindrical mother body are called cylindrical threads, and the threads formed on the conical mother body are called conical threads. In this application, cylindrical threads are used as an example for explanation.

[0049] It can be understood that the water inlet connector 111 and the water outlet connector 112 can both be set as external threads, or the water inlet connector 111 and the water outlet connector 112 can both be set as internal threads. At this time, the difference between the water inlet connector 111 and the water outlet connector 112 can be made by adjusting the thread geometric parameters; of course, the water inlet connector 111 can also be set as an external thread, and the water outlet connector 112 can be set as an internal thread; or the water inlet connector 111 can be set as an internal thread, and the water outlet connector 112 can be set as an external thread; the water inlet connector 111 and the water outlet connector 112 can be made to have obvious differences in appearance, and this application does not make specific restrictions on this.

[0050] In some embodiments, the water inlet connector 111 and the water outlet connector 112 are both provided with external threads or internal threads, and the tooth profiles of the external threads or internal threads of the water inlet connector 111 and the corresponding external threads or internal threads of the water outlet connector 112 are set differently, so that the external threads or internal threads of the water inlet connector 111 and the corresponding external threads or internal threads of the water outlet connector 112 have relatively obvious differences in shape. On the premise of ensuring the normal use of the water inlet connector 111 and the water outlet connector 112, the installer can quickly identify the water inlet connector 111 and the water outlet connector 112, which can improve the installation efficiency.

[0051] It should be noted that the thread profile refers to the contour shape of the thread in the cross-sectional area passing through the thread axis. The thread can be divided into triangular thread, rectangular thread, trapezoidal thread and serrated thread according to its cross-sectional shape (thread profile). The external thread or internal thread of the water inlet connector 111 can be a triangular thread, and the corresponding external thread or internal thread of the water outlet connector 112 can be a rectangular thread. There are many specific arrangements, which will not be described one by one in this application.

[0052] In some embodiments, as shown in Figure 2, one of the water inlet connector 111 and the water outlet connector 112 is provided with an external thread or an internal thread, and the other is provided with a union nut assembly, so that the water inlet connector 111 and the water outlet connector 112 can have large differences in shape, size and installation method, which is convenient for the installer to identify, and can avoid the water inlet connector 111 and the water outlet connector 112 being installed in the wrong direction due to poor lighting in the installation environment or other external factors, thereby improving the assembly accuracy of the water flow sensor.

[0053] It can be understood that the water inlet joint 111 can be provided with an external thread, and the water outlet joint 112 can be provided with a union nut assembly; or the water inlet joint 111 can be provided with an internal thread, and the water outlet joint 112 can be provided with a union nut assembly; and the water inlet joint 111 can be provided with a union nut assembly, and the water outlet joint 112 can be provided with an external thread or an internal thread; all of which can achieve differences in shape, size and installation method between the water inlet joint 111 and the water outlet joint 112, and the specific setting method is not limited in this application.

[0054] In some embodiments, one of the water inlet connector 111 and the water outlet connector 112 is provided with a union nut assembly, and the other is provided with a quick connect connector, that is, the water inlet connector 111 can be provided as a union nut assembly, and the water outlet connector 112 can be provided as a quick connect connector; or the water inlet connector 111 can be provided as a quick connect connector, and the water outlet connector 112 can be provided as a union nut assembly; in this case, the water inlet connector 111 and the water outlet connector 112 can be greatly different in appearance, size and installation method, which can avoid the water inlet connector 111 and the water outlet connector 112 being installed in the wrong direction due to poor light in the installation environment or other external factors, thereby improving the assembly accuracy of the water flow sensor. The specific setting method is not limited in this application.

[0055] It should be noted that the quick connect joint may include a cylindrical locking sleeve, a cylindrical locking frame is inserted and movably connected in the locking sleeve, a connecting tube is inserted in the locking frame, and a plurality of upper locking blocks that can move horizontally are provided at the upper end of the locking frame, and a horizontally arranged thrust spring is provided between the upper locking block and the locking frame, and the upper locking block pushed by the thrust spring moves horizontally outward, and the inner end of the upper locking block is provided with a threaded tooth 1 with the same tooth shape, and a plurality of protrusions 1 are provided on the inner side wall of the upper end of the locking sleeve, and the protrusion 1 is located on the outer side of the upper locking block, and the locking sleeve can rotate relative to the locking frame and make the protrusion 1 push the upper locking block to move so that the threaded tooth 1 extends out of the inner side wall of the locking frame, and a spring 1 is provided between the connecting tube and the locking frame, and the two ends of the spring 1 respectively abut against the connecting tube and the locking frame.

[0056] In one embodiment, the water outlet end of the water outlet connector 112 can have an external thread. When in use, the water outlet end of the water outlet connector 112 can be inserted into the locking frame, pushing and compressing the spring 1, and rotating the locking sleeve to move the locking sleeve relative to the locking frame, so that the outer end of the upper locking block is against the outer end of the protrusion 1, so that the protrusion 1 pushes the upper locking block and overcomes the translation of the thrust spring, so that the thread tooth 1 is engaged with the external thread of the water outlet end of the water outlet connector 112, so that the water outlet end of the water outlet connector 112 is locked in the locking sleeve, realizing the sealing of the two, the connection is fast and the connection effect is good; when disassembling, the locking sleeve can be reversed to make the outer end of the upper locking block detach from the inner end of the protrusion 1. At this time, under the action of the thrust spring, the upper locking block is reset, and it can be directly disassembled at this time.

[0057] Of course, in other embodiments, the water inlet end of the water inlet connector 111 may also have an external thread. When in use, the water inlet end of the water inlet connector 111 is inserted into the locking frame so that the water inlet end of the water inlet connector 111 is locked in the locking sleeve to achieve sealing between the two. This application does not make any specific limitations on this.

[0058] In some embodiments, a union nut assembly includes a connecting sleeve and a nut.

[0059] The connecting sleeve can be made of stainless steel, which can improve the overall anti-shear performance of the connecting sleeve. The connecting sleeve is connected to one of the water inlet joint 111 and the water outlet joint 112. The connection method can be various, such as welding or one-piece molding, and this application does not make specific restrictions on this.

[0060] The nut can have a hexagonal cross-section and an internal thread can be provided on its inner circumference. The outer surface of the connecting sleeve can be provided with an external thread corresponding to the internal thread on the inner circumference of the nut, so that the nut can be rotated along its axis and fitted onto the connecting sleeve. At this time, the water inlet joint 111 or the water outlet joint 112 can be threadedly connected to the water inlet pipe or the water outlet pipe through a flexible nut assembly; a sealing groove can be provided on the connecting sleeve, and a rubber gasket can be installed in the sealing groove. When the connecting sleeve and the nut are installed in place, the rubber gasket can seal the gap between the connecting sleeve and the nut, thereby improving the sealing performance of the flexible nut assembly.

[0061] It can be understood that when the connecting sleeve is connected to the water inlet joint 111, the nut is used to be threadedly connected to the water inlet pipe; when the connecting sleeve is connected to the water outlet joint 112, the nut is used to be threadedly connected to the water outlet pipe. This application does not make specific limitations on this.

[0062] It should be noted that the union nut has the characteristics of quick installation and maintenance, material saving, reduced maintenance procedures, water operation capability, and good sealing.

[0063] In some embodiments, as shown in Figure 3, one of the water inlet connector 111 and the water outlet connector 112 is provided with an external thread or an internal thread, and the other is provided with a quick-connect connector, so that the water inlet connector 111 and the water outlet connector 112 can have large differences in shape and installation method, which is convenient for the installer to identify, and can avoid the water inlet connector 111 and the water outlet connector 112 being installed in the wrong direction due to poor lighting in the installation environment or other external factors, thereby improving the assembly accuracy of the water flow sensor.

[0064] It can be understood that the water inlet joint 111 can be provided with an external thread, and the water outlet joint 112 can be provided with a flexible quick-connect joint; or the water inlet joint 111 can be provided with an internal thread, and the water outlet joint 112 can be provided with a quick-connect joint; and the water inlet joint 111 can be provided with a quick-connect joint, and the water outlet joint 112 can be provided with an external thread or an internal thread; all of which can achieve differences in shape, size and installation method between the water inlet joint 111 and the water outlet joint 112, and the specific setting method is not limited in this application.

[0065] In some embodiments, one of the water inlet connector 111 and the water outlet connector 112 is provided with an external thread and the other is provided with an internal thread, that is, the water inlet connector 111 can be provided with an external thread and the water outlet connector 112 can be provided with an internal thread; or the water inlet connector 111 can be provided with an internal thread and the water outlet connector 112 can be provided with an external thread; in this case, the water inlet connector 111 and the water outlet connector 112 can be greatly different in appearance, which can avoid the water inlet connector 111 and the water outlet connector 112 being installed in the wrong direction due to poor light in the installation environment or other external factors, thereby improving the assembly accuracy of the water flow sensor. The specific setting method is not limited in this application.

[0066] The embodiment of the present application also provides an inlet and outlet water joint device.

[0067] The water inlet and outlet joint device includes any one of the above-mentioned water flow sensors.

[0068] According to the water inlet and outlet joint device of the present application, by setting the above-mentioned water flow sensor, the water inlet joint 111 and the water outlet joint 112 have a relatively obvious difference. Under the premise of ensuring the normal use of the water flow sensor 100, it can avoid the water inlet joint 111 and the water outlet joint 112 being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, which can improve the assembly accuracy of the water inlet and outlet joint device, greatly save installation time, and improve installation efficiency.

[0069] The embodiment of the present application also provides a water heater.

[0070] The water heater comprises the above-mentioned water inlet and outlet joint device.

[0071] According to the water heater of the present application, by setting the above-mentioned water inlet and outlet joint device, under the premise of ensuring the normal use of the water flow sensor, it can avoid the water flow sensor being installed in the wrong direction due to poor lighting in the installation environment or limited installation space, and can improve the assembly accuracy of the water inlet and outlet joint device, greatly saving installation time and improving installation efficiency.

[0072] It is understandable that there are many options for water heaters, such as electric water heaters, gas water heaters, solar water heaters, magnetic water heaters, air water heaters, heating water heaters, heat pumps, etc. This application does not make specific limitations on this.

[0073] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0074] In the description of this application, it should be understood that the terms "length", "width", "thickness", "up", "down", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting this application.

[0075] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0076] In the description of this application, “plurality” means two or more.

[0077] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0078] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0079] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0080] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A water flow sensor, characterized in that: It comprises a main body, wherein the main body has a water inlet joint and a water outlet joint, and at least part of the structures of the water inlet joint and the water outlet joint are arranged differently.

2. The water flow sensor according to claim 1, characterized in that: The water inlet connector and the water outlet connector are both provided with external threads or internal threads, and the geometric parameters of the external threads or internal threads of the water inlet connector and the external threads or internal threads of the water outlet connector are at least partially different.

3. The water flow sensor according to claim 1 or 2, characterized in that: The water inlet joint and the water outlet joint are both provided with external threads or internal threads, and the external threads or internal threads of the water inlet joint have different thread profiles corresponding to the external threads or internal threads of the water outlet joint.

4. The water flow sensor according to any one of claims 1 to 3, characterized in that: One of the water inlet joint and the water outlet joint is provided with an external thread or an internal thread, and the other is provided with a movable nut assembly.

5. The water flow sensor according to any one of claims 1 to 3, characterized in that: One of the water inlet joint and the water outlet joint is provided with a living nut assembly, and the other is provided with a quick-connect joint.

6. The water flow sensor according to claim 4 or 5, characterized in that: The union nut assembly comprises: A connecting sleeve, the connecting sleeve being connected to one of the water inlet joint and the water outlet joint; The nut can be rotatably sleeved on the connecting sleeve along its axis, and the nut is used for threaded connection with the water inlet pipe or the water outlet pipe.

7. The water flow sensor according to any one of claims 1 to 3, characterized in that: One of the water inlet joint and the water outlet joint is provided with an external thread or an internal thread, and the other is provided with a quick-connect joint.

8. The water flow sensor according to any one of claims 1 to 3, characterized in that: One of the water inlet joint and the water outlet joint is provided with an external thread, and the other is provided with an internal thread.

9. A water inlet and outlet joint device, characterized in that: Includes a water flow sensor as described in any one of claims 1 to 8.

10. A water heater, characterized in that: The water heater comprises the water inlet and outlet joint device as claimed in claim 9.

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