Water inlet pipe assembly, water inlet electricity-proof wall and water heater

Abstract

The utility model belongs to the technical field of water heaters, and particularly discloses a water inlet pipe assembly, a water inlet electricity-proof wall and a water heater. The water inlet pipe assembly comprises an inner pipe, a middle pipe and a metal outer pipe. The inner tube has a central channel; the inner pipe is sleeved with the middle pipe, a gap channel is formed between the middle pipe and the inner pipe, the first end of the gap channel is communicated with the water outlet end of the center channel, and the inner pipe and the middle pipe are made of insulating materials. The metal outer pipe wraps the outer side of the middle pipe, a water outlet is formed in the side wall of the end, close to the water inlet end of the center channel, of the metal outer pipe, and the water outlet communicates with the second end of the gap channel. The water inlet electricity-proof wall comprises a connector assembly and a water inlet pipe assembly, the water inlet end of the inner pipe is detachably installed on the connector assembly, a water inlet hole is formed in the connector assembly and communicated with the center channel, and the water outlet is located outside the connector assembly. The length of the water inlet pipe assembly can be shortened, and the machining difficulty and the machining cost of the water inlet pipe assembly are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a water inlet pipe assembly, a water inlet anti-electrical wall and a water heater. Background Art

[0002] Electric water heaters are a common hot water appliance in modern homes, effectively meeting users' demand for hot water. To prevent electric shock accidents caused by leakage from electric water heaters into the water, existing electric water heaters typically incorporate anti-electrical barriers at the water inlet and outlet pipes. This extends the water inlet and outlet paths, thereby utilizing the water's inherent electrical resistance to reduce the risk of leakage.

[0003] The prior art provides a water inlet anti-electrical wall structure, which includes a water inlet joint and a water inlet pipe assembly mounted on the water inlet joint. The water inlet pipe assembly includes an inner tube and an outer tube spaced apart and sleeved outside the inner tube. The inner cavity of the inner tube forms a central channel and a gap channel between the inner tube and the outer tube. The water inlet end of the inner tube is mounted on the water inlet joint, and the water inlet joint has a water inlet hole connected to the central channel. The upper end of the water inlet channel is connected to the upper end of the gap channel, and the lower end sidewall of the outer tube is provided with a water outlet connected to the lower end of the gap channel. When water flows into the water inlet anti-electrical wall structure through the water inlet hole, the water first flows upward along the central channel to the upper end of the central channel, then flows into the gap channel through the central channel from the connection point of the gap channel, and then flows downward along the lower end of the gap channel to the water outlet, thereby extending the water inlet path in the water inlet anti-electrical wall structure.

[0004] In order to ensure the overall structural strength and rigidity, the water inlet anti-electricity wall structure provided by the existing technology has an inner tube made of insulating plastic and an outer tube made of metal material. As a result, only the central channel in the water inlet anti-electricity wall structure can serve as an anti-electricity wall. Therefore, in order to ensure the anti-electricity effect, the water inlet pipe is usually long and the overall cost is high. Utility Model Content

[0005] One of the technical problems solved by the present invention is to provide a water inlet pipe assembly, which can solve the problems of long length and high cost of the water inlet pipe assembly in the prior art, while ensuring the anti-electric effect of the water inlet pipe assembly, shortening the length of the water inlet pipe assembly and reducing the cost of the water inlet pipe assembly.

[0006] The second technical problem solved by the present invention is to provide a water inlet anti-electricity wall, which can effectively solve the problems of long length and high cost of existing water inlet anti-electricity walls, shorten the length of the water inlet anti-electricity wall, and reduce the cost of the water inlet anti-electricity wall.

[0007] The third technical problem solved by the present invention is to provide a water heater, which can effectively solve the problem of high cost of water inlet anti-electric wall in the prior art and reduce the cost of the water heater.

[0008] The first technical problem mentioned above is solved by the following technical solution:

[0009] A water inlet pipe assembly comprises an inner pipe and a metal outer pipe, wherein the inner pipe has a central channel and further comprises:

[0010] an intermediate tube, sleeved on the outer side of the inner tube, with a gap channel formed between the intermediate tube and the inner tube, the gap channel extending along the length of the inner tube and a first end of which is connected to the water outlet end of the central channel, the intermediate tube being made of an insulating material;

[0011] The metal outer tube is wrapped around the outside of the middle tube. A water outlet is provided on a side wall of one end of the metal outer tube close to the water inlet end of the central channel. The water outlet is communicated with the second end of the gap channel.

[0012] Compared with the background technology, the water inlet pipe assembly described in the present invention has the following beneficial effects: since the inner tube and the middle tube are both made of insulating materials, the central channel formed in the inner cavity of the inner tube and the gap channel formed between the inner tube and the middle tube can both increase the water circuit resistance, while ensuring the length of the effective anti-electric water circuit, reducing the total length of the inner tube, thereby reducing the length of the water inlet pipe assembly; since the lengths of the inner tube and the middle tube are relatively small, the required length of the metal outer tube is also reduced, thereby reducing the overall material cost of the water inlet pipe assembly, and at the same time reducing the processing difficulty of the water inlet pipe assembly, improving the product yield of the water inlet pipe assembly, and thus reducing the processing cost of the water inlet pipe assembly; furthermore, water discharge from the bottom of the metal outer tube can reduce the damage of cold water to the hot water layer, thereby increasing the hot water output.

[0013] In one embodiment, one end of the metal outer tube close to the water inlet end of the central channel extends out of the intermediate tube along the length direction to form a water outlet pipe section, the water outlet pipe section is spaced apart from the inner tube, and the water outlet is arranged in the water outlet pipe section.

[0014] In one embodiment, the water outlet has two ends along the circumference of the metal outer tube, and the water outlet is arranged from the two ends to the center and inclined toward the water inlet end of the central channel.

[0015] In one embodiment, the metal outer tube is punched inward to form a protrusion, and the protrusion presses against the middle tube.

[0016] In one embodiment, one end of the metal outer tube away from the water outlet is folded inward to form a flange portion, and the flange portion abuts against the middle tube.

[0017] In one embodiment, the intermediate tube is open at one end and closed at the other end.

[0018] In one embodiment, the inner wall of the intermediate tube is provided with a convex reinforcement rib, and at least two reinforcement ribs are provided at intervals along the circumference of the intermediate tube, and the reinforcement ribs abut against the inner tube;

[0019] And / or, both ends of the inner tube are open, and the water outlet end of the inner tube is spaced apart from the closed end of the middle tube.

[0020] The second technical problem mentioned above is solved by the following technical solution:

[0021] A water inlet anti-electric wall includes a joint assembly and the water inlet pipe assembly as described above. The water inlet end of the inner pipe can be detachably installed on the joint assembly. A water inlet hole is opened on the joint assembly, and the water inlet hole is connected to the central channel. The water outlet is located outside the joint assembly.

[0022] Compared with the background technology, the water inlet anti-electricity wall described in the present invention has the following beneficial effects: by adopting the above-mentioned water inlet pipe assembly, the overall length of the water inlet anti-electricity wall can be shortened and the cost of the water inlet anti-electricity wall can be reduced.

[0023] In one embodiment, the connector assembly includes:

[0024] A housing, wherein both ends of the housing are provided with the water inlet hole and the mounting hole in communication, and the diameter of the mounting hole is larger than the diameter of the water inlet hole;

[0025] A positioning sleeve is interference-fitted into the mounting hole and abuts against the bottom of the mounting hole. The positioning sleeve has a mounting cavity with two through ends. The mounting cavity is used to install the rotor of the flow sensor. The water inlet end of the inner tube is interference-fitted into the end of the mounting cavity away from the water inlet hole. The mounting cavity connects the central channel and the water inlet hole.

[0026] The third technical problem mentioned above is solved by the following technical solution:

[0027] A water heater comprises an inner tank and the water inlet anti-electrical wall as described above, wherein the joint assembly is detachably mounted on the inner tank, and the water inlet pipe assembly extends into the interior of the inner tank.

[0028] Compared with the background technology, the water heater described in the present invention has the beneficial effect of reducing the overall cost of the water heater by adopting the above-mentioned water inlet anti-electricity wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a water inlet and electric shock wall provided in an embodiment of the present utility model;

[0030] Figure 2 A schematic diagram of the disassembled structure of the water inlet pipe assembly provided in an embodiment of the utility model;

[0031] Figure 3 A cross-sectional schematic diagram of a water inlet pipe assembly provided by an embodiment of the present utility model;

[0032] Figure 4 A longitudinal sectional view of a water inlet pipe assembly provided in an embodiment of the present utility model in a longitudinal section;

[0033] Figure 5 for Figure 4 A partial enlarged view of point I in the middle;

[0034] Figure 6 for Figure 4 A partial enlarged view of the middle J;

[0035] Figure 7 A longitudinal sectional view of the water inlet pipe assembly provided by an embodiment of the present utility model in another longitudinal section;

[0036] Figure 8 for Figure 7 A partial enlarged view of the K point in the middle;

[0037] Figure 9 A cross-sectional view of a connector assembly provided in an embodiment of the present invention.

[0038] Description of labels:

[0039] 100, water inlet pipe assembly; 200, connector assembly; 201, housing; 2011, water inlet hole; 2012, mounting hole; 202, positioning sleeve; 2021, mounting sleeve; 2022, plug sleeve; 2023, limiting ring; 2024, mounting cavity; 203, sealing ring;

[0040] 1. Inner tube; 11. Inner main tube; 12. Positioning protrusion; 13. Center channel;

[0041] 2. Intermediate tube; 21. Sleeve portion; 22. Reinforcement rib portion;

[0042] 3. Metal outer tube; 31. Outer main tube; 311. Water outlet; 32. Flanged portion; 33. Folded edge portion; 34. Protrusion;

[0043] 4. Gap channel; 5. Water outlet channel. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0045] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, and therefore cannot be understood as a limitation on this application.

[0046] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0048] like Figures 1 to 4 As shown, this embodiment provides a water inlet anti-electricity wall, which can be applied to a water heater to realize the anti-leakage setting of the water inlet anti-electricity wall while ensuring the water inlet to the water heater, and reduce the cost of the water inlet anti-electricity wall and improve the reliability of the use of the water inlet anti-electricity wall.

[0049] Specifically, the water inlet anti-electric wall includes a joint assembly 200 and a water inlet pipe assembly 100. The first end of the water inlet pipe assembly 100 is installed on the joint assembly 200, and the second end extends in a direction away from the joint assembly 200. The water inlet pipe assembly 100 has a curved water inlet channel inside; the joint assembly 200 is used to connect to the inner tank of the water heater, and a water inlet hole 2011 is opened on the joint assembly 200, and the water inlet hole 2011 is connected to the water inlet end of the water inlet channel.

[0050] In this embodiment, the water inlet pipe assembly 100 includes an inner tube 1, an intermediate tube 2, and a metal outer tube 3. The inner tube 1 has a central channel 13 extending along its length and communicating with the water inlet end of the inner tube 1 through the water inlet hole 2011. The intermediate tube 2 is sleeved onto the outer surface of the inner tube 1, with a gap channel 4 formed between the intermediate tube 2 and the inner tube 1. The gap channel 4 extends along the length of the inner tube 1 and communicates with the water outlet end of the central channel 13 through its first end. The metal outer tube 3 wraps around the outer surface of the intermediate tube 2, and a water outlet 311 is formed on the outer wall of one end of the metal outer tube 3, near the water inlet end of the central channel 13. The water outlet 311 communicates with the second end of the gap channel 4. Both the inner tube 1 and the intermediate tube 2 are made of insulating material, and the central channel 13 and the gap channel 4 together form the water inlet channel.

[0051] The water inlet pipe assembly 100 provided in this embodiment has an inner tube 1 and an intermediate tube 2 both made of insulating material, so that the central channel 13 formed in the inner cavity of the inner tube 1 and the gap channel 4 formed between the inner tube 1 and the intermediate tube 2 can both play a role in increasing the water circuit resistance, while ensuring the length of the effective anti-electric water circuit, reducing the total length of the inner tube 1, thereby reducing the length of the water inlet pipe assembly 100; since the lengths of the inner tube 1 and the intermediate tube 2 are relatively small, the required length of the metal outer tube 3 is reduced, thereby reducing the overall material cost of the water inlet pipe assembly 100, and also reducing the processing difficulty of the water inlet pipe assembly 100, improving the product yield of the water inlet pipe assembly 100, and thus reducing the processing cost of the water inlet pipe assembly 100; at the same time, since the metal outer tube 3 is wrapped around the outside of the intermediate tube 2, the overall structural strength and rigidity of the water inlet pipe assembly 100 can be guaranteed, thereby ensuring the reliability and stability of the water inlet pipe assembly 100.

[0052] It is worth noting that the material of the inner tube 1 and the intermediate tube 2 can be the material of the inner tube in the existing water inlet pipe assembly, such as plastic, and the material of the metal outer tube 3 can be the material of the outer tube in the existing water inlet pipe assembly. The present invention does not limit the specific materials of the inner tube 1, the intermediate tube 2 and the outer tube 3.

[0053] like Figures 2 to 5 As shown, to simplify the structure of the water inlet pipe assembly 100, the intermediate pipe 2 is open at one end and closed at the other. That is, the closed end of the intermediate pipe 2 seals the end of the gap channel 4 that connects to the central channel 13. In other embodiments, the intermediate pipe 2 may also be a tubular structure with both ends open, with a plug provided at the end of the intermediate pipe 2 to seal the end of the intermediate pipe 2 near the water outlet of the central channel 13.

[0054] To further reduce the difficulty of manufacturing the water inlet pipe assembly 100, both ends of the inner tube 1 are open, and the outlet end of the inner tube 1 is spaced apart from the end faces of the blocked end of the intermediate tube 2, so that a communication channel is formed between the closed ends of the inner tube 1 and the intermediate tube 2, connecting the central channel 13 and the gap channel 4. In other embodiments, the outlet end of the inner tube 1 can also abut the closed end of the intermediate tube 2, and the side wall of the outlet end of the inner tube 1 is provided with a communication port connecting the central channel 13 and the gap channel 4.

[0055] In one embodiment, the intermediate tube 2 includes a sleeve portion 21, one end of the sleeve portion 21 is open and the other end is closed. The sleeve portion 21 is arranged on the outside of the inner tube 1 and is spaced apart from the inner tube 1. A central channel 13 is formed between the inner wall of the sleeve portion 21 and the outer wall of the inner tube 1, and the metal outer tube 3 is wrapped around the outer wall of the sleeve portion 21.

[0056] The inner wall of the sleeve portion 21 is provided with protruding reinforcing ribs 22. At least two reinforcing ribs 22 are spaced apart along the circumference of the sleeve portion 21, and the reinforcing ribs 22 abut against the inner tube 1. Adjacent reinforcing ribs 22, the inner tube 1, and the sleeve portion 21 together form a gap channel 4. This arrangement facilitates the abutment of the reinforcing ribs 22 with the inner tube 1, ensuring the coaxial arrangement of the intermediate tube 2 and the inner tube 1, and facilitating the overall assembly accuracy of the water inlet pipe assembly 100. Furthermore, the provision of the reinforcing ribs 22 also helps maintain the structural strength of the intermediate tube 2, reducing the probability of localized displacement and deformation of the intermediate tube 2 relative to the inner tube 1.

[0057] In one embodiment, one end of the reinforcing rib portion 22 extends to the bottom of the sleeve portion 21 , and the other end extends to an open end close to the sleeve portion 21 , so as to enhance the structural reinforcement effect.

[0058] To simplify the structure of the metal outer tube 3, the metal outer tube 3 includes an outer main tube portion 31 with both ends open. The outer main tube portion 31 wraps around the outer wall of the intermediate tube 2. The inner wall surface of the outer main tube portion 31 is tightly fitted with the outer wall surface of the intermediate tube 2 to prevent relative looseness between the two.

[0059] In one embodiment, to prevent the intermediate tube 2 from slipping out of the metal outer tube 3, one end of the outer main tube 31, near the closed end of the intermediate tube 2, is folded inward to form a flange 32. The flange 32 can abut against the intermediate tube 2 to prevent the intermediate tube 2 from slipping out. The flange 32 is preferably an arc-shaped flange and smoothly connects to the outer main tube 31 to facilitate processing of the flange 32. In other embodiments, the flange 32 can also be arranged perpendicular to the outer main tube 31.

[0060] like Figure 7 and Figure 8As shown, in order to further ensure the assembly stability of the intermediate tube 2 and the metal outer tube 3, the metal outer tube 3 is partially extruded inward to form a protrusion 34, which presses against the intermediate tube 2, thereby reducing the probability of relative displacement between the metal outer tube 3 and the intermediate tube 2 in the length direction, and further improving the assembly stability of the metal outer tube 3 and the intermediate tube 2.

[0061] It can be understood that the reinforcing ribs 22 abut against the inner tube 1 , and the intermediate tube 2 is clamped to the inner tube 1 , so that the metal outer tube 3 , the intermediate tube 2 and the inner tube 1 are installed and fixed.

[0062] like Figure 4 and Figure 6 As shown, to further reduce the difficulty of manufacturing the water inlet pipe assembly 100, the end of the metal outer tube 3, near the water inlet end of the central channel 13, extends out of the intermediate tube 2 along the length of the inner tube 1 to form a water outlet pipe section. The water outlet pipe section is spaced apart from the inner tube 1 to form a water outlet channel 5. A water outlet 311 is provided on the side wall of the water outlet pipe section. The water outlet 311 communicates with the gap channel 4 through the water outlet channel 5. This arrangement allows the water outlet 311 to be offset from the intermediate tube 2 in the length direction, thereby preventing the intermediate tube 2 from affecting the water outlet of the gap channel 4. It also eliminates the need to provide an opening for water outlet in the intermediate tube 2, reducing the difficulty and cost of manufacturing the intermediate tube 2.

[0063] To ensure smooth water flow, at least two water hole groups are arranged at intervals along the circumferential direction of the water outlet pipe section. Each water hole group includes multiple water outlets 311 arranged at intervals along the length direction of the water outlet pipe section, thereby reducing water flow resistance and improving water flow smoothness.

[0064] The water outlet 311 has two opposing ends circumferentially disposed along the metal outer tube 3. The water outlet 311 extends from the two ends to the center, slanting toward the water inlet end of the central channel 13. Alternatively, the water outlet 311 extends downwardly from one end to the other. This arrangement, when the water inlet pipe assembly 100 is installed in the inner tank, guides the water in the water outlet channel 5 downward, reducing the disturbance of the outlet water on the upper layer of the inner tank.

[0065] In one embodiment, within a longitudinal projection plane passing through the axis of the metal outer tube 3 and the center of the water outlet 311, the angle between the orthographic projection of the water outlet 311 and the axis of the metal outer tube 3 is 45° to 60°, ensuring effective drainage of water from the metal outer tube 3. Preferably, the opening width of the water outlet 311 along the length of the inner tube 1 is 2.5 to 4 mm to avoid reducing the overall structural strength and rigidity of the metal outer tube 3 due to an excessively wide water outlet 311. Furthermore, each water hole group is provided with 9 to 14 water outlets 311.

[0066] like Figure 9As shown, in one embodiment, the inner tube 1 includes an inner main tube portion 11 located inside the intermediate tube 2, and the outer wall of the water inlet end of the inner main tube portion 11 is provided with a positioning protrusion 12 protruding outward, and the second end of the metal outer tube 3 abuts against the positioning protrusion 12, thereby realizing the installation and positioning of the metal outer tube 3 relative to the inner tube 1.

[0067] Furthermore, the lower end of the inner main pipe portion 11 is folded to form a folded edge portion 33, which abuts against the positioning protrusion 34 to increase the contact area between the metal outer pipe 3 and the positioning protrusion 34, thereby ensuring the installation stability and reliability of the metal outer pipe 3.

[0068] In order to improve the installation convenience of the water inlet pipe assembly 100 on the joint assembly 200, the joint assembly 200 includes a shell 201 and a positioning sleeve 202. The shell 201 is provided with a water inlet hole 2011 and a mounting hole 2012 that are connected. The water inlet hole 2011 and the mounting hole 2012 respectively pass through the opposite ends of the shell 201. The aperture of the mounting hole 2012 is larger than the aperture of the water inlet hole 2011, so that the connection between the mounting hole 2012 and the water inlet hole 2011 forms a positioning step surface facing the mounting hole 2012; the positioning sleeve 202 is inserted into the mounting hole 2012 with interference fit and The first end abuts against the positioning step surface, and the positioning sleeve 202 has an installation cavity 2024 with two through ends. The inner diameter of the installation cavity 2024 is larger than the inner diameter of the water inlet hole 2011. A limiting step is convexly provided on the inner wall of the end of the installation cavity 2024 away from the positioning step surface. The installation cavity 2024 is used to install the rotor assembly of the flow sensor; the inner tube 1 of the water inlet pipe assembly 100 is interference-inserted in the installation cavity 2024 at one end away from the water inlet hole 2011, and the water inlet pipe assembly 100 abuts against the positioning sleeve 202, and the water inlet hole 2011, the installation cavity 2024 and the center channel 13 are connected in sequence.

[0069] With the above arrangement, since the positioning sleeve 202 is inserted into the mounting hole 2012 of the housing 201 through interference, and the first end of the water inlet pipe assembly 100 is inserted into the mounting cavity 2024 through interference, the housing 201, the positioning sleeve 202 and the water inlet pipe assembly 100 can be processed and assembled separately, reducing the processing difficulty; at the same time, when assembling the water inlet anti-electric wall, the positioning sleeve 202 can be first inserted into the mounting hole 2012, and then the water inlet pipe assembly 100 can be inserted into the mounting cavity 2024 through interference, and the positioning sleeve 202 can be clamped between the positioning step surface and the water inlet pipe assembly 100. The assembly can be realized, and the assembly is simple and efficient. Since the rotor assembly is located between the positioning step surface and the limit step, the installation stability and reliability of the rotor assembly in the water inlet anti-electricity wall can be guaranteed. When the water inlet anti-electricity wall is disassembled, the water inlet pipe assembly 100 is pulled out of the installation cavity 2024, and the positioning sleeve 202 can be pulled out of the shell 201, which is conducive to the disassembly, maintenance and replacement of some parts of the water inlet anti-electricity wall. At the same time, it is also conducive to the inspection and replacement of the rotor assembly installed in the positioning sleeve 202, thereby improving the convenience of maintenance and replacement and reducing the cost of maintenance and replacement.

[0070] Furthermore, the positioning protrusion 34 is located in the mounting hole 2012 and has an interference fit with the mounting hole 2012. This arrangement can prevent water outside the housing 201 from entering the mounting hole 2012 through the gap between the water inlet pipe assembly 100 and the wall of the mounting hole 2012. At the same time, it can enhance the overall installation stability and reliability of the water inlet pipe assembly 100.

[0071] Furthermore, a sealing ring 203 is provided between the outer side of the water inlet end of the inner tube 1 and the positioning sleeve 202 to enhance the sealing at the connection between the positioning sleeve 202 and the water inlet pipe assembly 100, further reduce the probability of water leakage, and improve the reliability of the water inlet anti-electric wall.

[0072] In order to improve the installation convenience of the rotor assembly in the installation cavity 2024, in one embodiment, the installation cavity 2024 includes a main cavity portion and a plug-in cavity portion that are coaxially connected. The main cavity portion is located between the water inlet hole 2011 and the plug-in cavity portion, and the inner diameter of the main cavity portion is larger than the inner diameter of the plug-in cavity portion and the inner diameter of the water inlet hole 2011. A limiting step is formed at the connection between the main cavity portion and the plug-in cavity portion. The main cavity portion is used to install the rotor assembly, and the first end of the water inlet pipe assembly 100 is inserted into the plug-in cavity portion with an interference fit. This arrangement allows the rotor assembly to be installed into the main cavity portion from the side of the main cavity portion away from the plug-in cavity portion, facilitates the processing and forming of the limiting step, and simplifies the structure of the positioning sleeve 202. In other embodiments, a convex ring can be provided on the inner wall of the installation cavity 2024, and the end face of the convex ring forms a limiting step.

[0073] To simplify the structure of the positioning sleeve 202, the positioning sleeve 202 includes a coaxially connected mounting sleeve portion 2021 and a plug-in sleeve portion 2022. The inner cavity of the mounting sleeve portion 2021 forms a main cavity, and the inner cavity of the plug-in sleeve portion 2022 forms a plug-in cavity. The outer diameter of the mounting sleeve portion 2021 is larger than the outer diameter of the plug-in sleeve portion 2022, and the mounting sleeve portion 2021 is interference-fitted into the mounting hole 2012. This reduces the wall thickness of the positioning sleeve 202 at the plug-in cavity, reduces the overall weight of the positioning sleeve 202, and facilitates the processing of the positioning sleeve 202, reducing the processing cost of the positioning sleeve 202. At the same time, this arrangement creates a gap between the plug-in sleeve portion 2022 and the wall of the mounting hole 2012, facilitating the removal of the positioning sleeve 202 through this gap when disassembling the water-proof wall.

[0074] In one embodiment, a retaining ring portion 2023 is protruding from the wall of the installation cavity 2024, and an annular groove is formed on the outer wall of the first end of the inner tube 1. The annular groove extends through the first end surface of the water inlet pipe assembly 100. The sealing ring 203 is pressed between the bottom of the annular groove and the retaining ring portion 2023 to achieve axial sealing at the connection between the inner tube 1 and the positioning sleeve 202. Furthermore, the sealing ring 203 is also squeezed between the groove wall of the annular groove and the wall of the installation cavity 2024 to achieve radial sealing at the connection between the inner tube 1 and the positioning sleeve 202, thereby enhancing the sealing effect.

[0075] That is, the above arrangement enables the water inlet pipe assembly 100 to press the limiting ring portion 2023 by squeezing the sealing ring 203 during assembly, that is, squeezing the positioning sleeve 202. Specifically, the limiting ring portion 2023 is protruded from the cavity wall of the plug-in cavity.

[0076] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features 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.

[0077] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A water inlet pipe assembly, comprising an inner pipe (1) and a metal outer pipe (3), wherein the inner pipe (1) has a central channel (13), characterized in that: Also includes: an intermediate tube (2) sleeved on the outer side of the inner tube (1), and forming a gap channel (4) between the intermediate tube (2) and the inner tube (1), wherein the gap channel (4) extends along the length direction of the inner tube (1) and a first end of the gap channel (4) is connected to the water outlet end of the central channel (13), and the intermediate tube (2) is made of an insulating material; The metal outer tube (3) is wrapped around the outside of the intermediate tube (2), and a water outlet (311) is provided on a side wall of one end of the metal outer tube (3) close to the water inlet end of the central channel (13), and the water outlet (311) is communicated with the second end of the gap channel (4).

2. The water inlet pipe assembly according to claim 1, characterized in that: One end of the metal outer tube (3) close to the water inlet end of the central channel (13) extends out of the intermediate tube (2) along the length direction to form a water outlet pipe section, the water outlet pipe section is spaced apart from the inner tube (1), and the water outlet (311) is provided in the water outlet pipe section.

3. The water inlet pipe assembly according to claim 2, characterized in that: The water outlet (311) has two ends along the circumference of the metal outer tube (3), and the water outlet (311) is arranged from the two ends to the center and is inclined toward the water inlet end of the central channel (13).

4. The water inlet pipe assembly according to claim 1, characterized in that: The metal outer tube (3) is punched inwardly to form a protrusion (34), and the protrusion (34) presses against the intermediate tube (2).

5. The water inlet pipe assembly according to claim 1, characterized in that: One end of the metal outer tube (3) away from the water outlet (311) is folded inward to form a flange portion (32), and the flange portion (32) abuts against the middle tube (2).

6. The water inlet pipe assembly according to any one of claims 1 to 5, characterized in that: The intermediate tube (2) is open at one end and closed at the other end.

7. The water inlet pipe assembly according to claim 6, characterized in that: The inner wall of the intermediate tube (2) is provided with a convex reinforcement rib (22), and at least two reinforcement ribs (22) are provided at intervals along the circumference of the intermediate tube (2), and the reinforcement ribs (22) abut against the inner tube (1); And / or, both ends of the inner tube (1) are open, and the water outlet end of the inner tube (1) and the closed end of the intermediate tube (2) are spaced apart.

8. A water-proof electric wall, characterized in that: The invention comprises a joint assembly (200) and a water inlet pipe assembly according to any one of claims 1 to 7, wherein the water inlet end of the inner tube (1) is detachably mounted on the joint assembly (200), a water inlet hole (2011) is provided on the joint assembly (200), the water inlet hole (2011) is communicated with the central channel (13), and the water outlet (311) is located outside the joint assembly (200).

9. The water inlet and electric shock barrier according to claim 8, characterized in that: The joint assembly (200) comprises: A housing (201), wherein the water inlet hole (2011) and the mounting hole (2012) are connected to each other at both ends of the housing (201), and the diameter of the mounting hole (2012) is larger than the diameter of the water inlet hole (2011); A positioning sleeve (202) is interference-inserted into the mounting hole (2012) and abuts against the bottom of the mounting hole (2012); the positioning sleeve (202) has a mounting cavity (2024) with two ends extending therethrough; the mounting cavity (2024) is used to mount a rotor of a flow sensor; the water inlet end of the inner tube (1) is interference-inserted at one end of the mounting cavity (2024) away from the water inlet hole (2011); and the mounting cavity (2024) communicates with the central channel and the water inlet hole.

10. A water heater comprising an inner tank, characterized in that: It also includes the water inlet anti-electric wall as described in claim 8 or 9, the joint assembly (200) is detachably mounted on the inner liner, and the water inlet pipe assembly extends into the interior of the inner liner.

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