Water pipe assembly and water heater

Abstract

The present invention discloses a water pipe assembly and a water heater. The water pipe assembly includes: a connecting water pipe that extends into a water pipe joint of an inner tank; and an adapter that is disposed outside the connecting water pipe. The adapter includes a first adapter section that is sealingly connected to the connecting water pipe and a second adapter section that is connected to one end of the first adapter section. The inner surface of the second adapter section is provided with an internal thread for threaded connection with the water pipe joint. In this way, by adding an adapter to connect the water pipe joint of the inner tank and the connecting water pipe, the connection difficulty between the two can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and particularly to a water pipe assembly and a water heater. Background Art

[0002] In the prior art, a water pipe joint is usually provided on the inner tank of a water heater, and a connecting water pipe (such as an inlet water pipe, or an outlet water pipe, or an inlet and outlet water pipe, etc.) extends into the inner tank through the water pipe joint, and a radial sealing connection is formed between the outer peripheral surface of the connecting water pipe and the inner wall surface of the water pipe joint, so that the connecting water pipe can be fixed to the water pipe joint and a sealing connection with the inner tank can be achieved.

[0003] Based on process requirements, the inside of the inner tank generally needs to be enameled, and after the enameling treatment, high-temperature curing is required, and the temperature is as high as over 800 °C. Due to the fluidity of the enamel inside the inner tank, the inner wall surface of the water pipe joint will be uneven, which is not conducive to the radial connection between the connecting water pipe and the water pipe joint. Summary of the Invention

[0004] The main object of the present invention is to propose a water pipe assembly, aiming to solve the technical problem that it is not easy to connect the connecting water pipe and the water pipe joint in the prior art.

[0005] To achieve the above object, the present invention proposes a water pipe assembly for a water heater, and the water pipe assembly includes:

[0006] A connecting water pipe that extends into the water pipe joint of the inner tank; and

[0007] A swivel joint that is provided outside the connecting water pipe, the swivel joint includes a first transfer section that is hermetically connected to the connecting water pipe, and a second transfer section that is connected to one end of the first transfer section, and an internal thread is provided on the inner surface of the second transfer section for threaded connection with the water pipe joint.

[0008] Optionally, the inner diameter of the second transfer section is larger than the inner diameter of the first transfer section, and the water pipe assembly further includes a first annular seal, and the first annular seal is used to be provided between the end face of the first transfer section and the joint end face of the water pipe joint.

[0009] Optionally, the water pipe assembly further includes a second annular seal, and the second annular seal is provided between the inner pipe wall surface of the first transfer section and the outer pipe wall surface of the connecting water pipe.

[0010] Optionally, an annular accommodation groove is provided on the outer pipe wall surface of the connecting water pipe, and the second annular seal is provided in the annular accommodation groove; and / or,

[0011] A plurality of the second annular seals are distributed at intervals in the length direction of the connecting water pipe.

[0012] Optionally, a first connecting convex portion protrudes from the outer wall surface of the connecting water pipe, a second connecting convex portion protrudes from the outer wall surface of the first adapter section, the first adapter section abuts against the first connecting convex portion, and the second connecting convex portion is connected to the first connecting convex portion, so that the connecting water pipe is fixed to the first adapter section.

[0013] Optionally, the water pipe assembly further includes a clamping member that connects the first connecting convex portion and the second connecting convex portion; or,

[0014] the water pipe assembly further includes a fastening member that connects the first connecting convex portion and the second connecting convex portion.

[0015] Optionally, the first connecting convex portion is annular, and / or, the first connecting convex portion is annular.

[0016] Optionally, an internal thread is provided on the inner surface of the first adapter section, and an external thread is provided on the outer wall surface of the connecting water pipe, so that the first adapter section is threadedly connected outside the connecting water pipe.

[0017] Optionally, the adapter is made of a corrosion-resistant material; or,

[0018] a corrosion-resistant layer is provided on the surface of the adapter.

[0019] Optionally, the connecting water pipe includes:

[0020] a connecting base having a water outlet through hole;

[0021] a water outlet inner pipe, one end of which is integrally provided on the connecting base, and the water outlet inner pipe communicates with the water outlet through hole;

[0022] a water inlet outer pipe, one end of which is integrally provided on the connecting base, the water inlet outer pipe is located outside the water outlet inner pipe, a water inlet channel is formed between the water inlet outer pipe, the water outlet inner pipe and the connecting base, and a side water inlet communicating with the water inlet channel is provided on the water inlet outer pipe; the first adapter section is hermetically connected to the water inlet outer pipe.

[0023] Optionally, the water inlet outer pipe includes a mounting section connected to the connecting base and a water delivery section connected to the mounting section, the wall thickness of the mounting section is greater than the wall thickness of the water delivery section, and the first adapter section is hermetically connected to the outside of the mounting section.

[0024] Optionally, the outer diameter or equivalent outer diameter of the water inlet outer pipe is greater than or equal to 22 mm and less than or equal to 50 mm.

[0025] The present invention also provides a water heater, which includes:

[0026] The inner container, the inner container has a water inlet; and

[0027] The water pipe assembly as described above, the water pipe assembly is arranged at the water inlet.

[0028] In the present invention, by adding an adapter to connect the water pipe joint of the inner container and the connecting water pipe, the connection difficulty between the two can be reduced. At the same time, by providing an internal thread on the inner surface of the second adapter section to be threadedly connected with the water pipe joint, not only can the connection between the adapter and the water pipe joint be made simple, convenient and firm, but also the connection between the connecting water pipe and the water pipe joint will not be affected by the inner wall surface of the water pipe joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0030] Figure 1 It is a schematic structural diagram of an embodiment of a water heater of the present invention;

[0031] Figure 2 is Figure 1 a schematic cross-sectional view of the water heater in;

[0032] Figure 3 is Figure 2 a partial enlarged view of part A in;

[0033] Figure 4 is Figure 1 a schematic structural diagram of the water pipe assembly in;

[0034] Figure 5 is Figure 4 an exploded schematic diagram of the water pipe assembly in;

[0035] Figure 6 is Figure 5 a schematic structural diagram of the adapter in;

[0036] Figure 7 is Figure 5 a schematic structural diagram of the connecting water pipe in;

[0037] Figure 8 is Figure 5 a schematic structural diagram of the swivel head in;

[0038] Figure 9 is Figure 4 a schematic cross-sectional view of the water pipe assembly in;

[0039] Figure 10 is Figure 9 A partial enlarged view at position B in

[0040] Figure 11 is Figure 9 A partial schematic view at the lower part of the connecting water pipe in

[0041] Figure 12 is Figure 9 A partial schematic view at the steering head in

[0042] Figure 13 is Figure 4 A structural schematic view of the clamping part in

[0043] Figure 14 is Figure 4 A structural schematic view of the water pipe main body in

[0044] Figure 15 is Figure 14 A side view of the water pipe main body in

[0045] Figure 16 In another embodiment of the water heater of the present invention, it is a structural schematic view of the water pipe assembly;

[0046] Figure 17 is Figure 16 An exploded schematic view of the water pipe assembly in

[0047] Figure 18 is Figure 16 A sectional schematic view of the center lines of the two flow channels of the water pipe main body in

[0048] Figure 19 is Figure 16 A sectional schematic view of the center lines of the water inlet interface and the water outlet interface in

[0049] Figure 20 In yet another embodiment of the water heater of the present invention, it is a structural schematic view;

[0050] Figure 21 is Figure 20 A partial schematic view at the connecting water pipe in

[0051] Figure 22 In still another embodiment of the water heater of the present invention, it is a structural schematic view of the water pipe assembly.

[0052] Explanation of the reference numerals in the drawings:

[0053] 100, water pipe assembly; 10, connecting water pipe; 11, connecting base; 111, water outlet hole; 112, water outlet interface; 1121, water outlet inner interface; 1122, water outlet metal outer interface; 12, water outlet inner pipe; 13, water inlet outer pipe; 131, side water inlet; 132, water delivery hole; 133, installation section; 134, water delivery section; 135, installation ring groove; 136, support part; 137, water inlet convex part; 1371, water inlet flow channel; 1372, transfer flow channel; 138, annular placement groove; 139, first connecting convex part; 13a, first limiting part Position plate; 14, water inlet channel; 20, water outlet pipe in the gallbladder; 21, connecting ring convex; 22, metal outer tube; 23, plastic inner tube; 30, connecting joint; 31, water passage; 32, spacing convex part; 33, connecting ring groove; 34, accommodating step; 40, guide pipe; 41, guide hole; 51, water inlet pipe in the gallbladder; 52, connecting sleeve; 521, limiting fork groove; 53, fork buckle; 531, U-shaped fork; 532, fixed base; 54, long connecting column; 55, first annular seal; 56, second annular seal; 60, adapter; 61, first adapter section ; 611, second connecting protrusion; 62, second transition section; 70, snap-fitting piece; 71, connecting base plate; 72, snap-fitting spring piece; 721, snap-fitting hole; 722, elastic supporting section; 723, snap-fitting section; 7231, first snap-fitting subsection; 7232, second snap-fitting subsection; 7233, first side pressing piece; 724, guide section; 725, plug-in piece; 73, first snap-fitting half ring; 731, undercut; 74, second snap-fitting half ring; 741, buckle hole; 80, external water inlet pipe; 81, water inlet channel; 82, water pipe body; 821, diversion channel; 82 1a, first flow channel; 821b, second flow channel; 821c, third flow channel; 83, steering head; 831, steering flow channel; 832, steering connecting flow channel; 8321, first flow section; 8322, second flow section; 833, mounting port; 834, steering column; 8341, mounting plane; 835, connecting column; 84, plug; 841, stop boss; 85, auxiliary fixing foot; 86, water inlet interface; 90, flow sensor; 91, magnetic rotor; 92, Hall element; 1000, water heater; 200, inner tank; 210, water pipe joint.

[0054] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] It should be noted that if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, such descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature.

[0057] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where both A and B are satisfied simultaneously.

[0058] The present invention provides a water pipe assembly and a water heater, and the water pipe assembly is used for the water heater.

[0059] In an embodiment of the present invention, as Figure 1 and 2 shown, the water heater 1000 includes a housing, an inner tank 200, and a water pipe assembly 100. The inner tank 200 is disposed inside the housing. A water passing port is provided on the inner tank 200, and the water pipe assembly 100 is disposed at the water passing port.

[0060] In one embodiment, as Figure 1 and 2 shown, the water passing port is an inlet and outlet port. The water pipe assembly 100 includes a connecting water pipe 10, and the connecting water pipe 10 is an inlet and outlet water pipe, that is, the connecting water pipe 10 has an inlet channel 14 for sending water into the inner tank 200 and an outlet channel for sending the water in the inner tank 200 out. The inlet and outlet water pipe is connected to the inlet and outlet port.

[0061] Further, as Figure 1-15 shown, the connecting water pipe 10 includes a connecting base 11, an inner outlet pipe 12, and an outer inlet pipe 13. The connecting base 11 has an outlet through hole 111. One end of the inner outlet pipe 12 is integrally disposed on the connecting base 11, and the inner outlet pipe 12 communicates with the outlet through hole 111. One end of the outer inlet pipe 13 is integrally disposed on the connecting base 11. The outer inlet pipe 13 is located outside the inner outlet pipe 12. An inlet channel 14 is formed between the outer inlet pipe 13, the inner outlet pipe 12, and the connecting base 11. A side inlet 131 communicating with the inlet channel 14 is provided on the outer inlet pipe 13.

[0062] Among them, the outlet through hole 111 and the inner pipe channel of the inner outlet pipe 12 together form an outlet channel.

[0063] Wherein, the outer wall surface of the water outlet inner pipe 12 is used to form the inner wall surface of the water inlet channel 14, and the inner wall surface of the water inlet outer pipe 13 is used to form the outer wall surface of the water inlet channel 14. The connecting base 11 is used to block one end of the space between the water outlet inner pipe 12 and the water inlet outer pipe 13 to form the water inlet channel 14.

[0064] When the connecting water pipe 10 is applied to the inner tank 200, the connecting water pipe 10 extends into the inner tank 200 through the water inlet and outlet on the inner tank 200, and the side water inlet 131 is located outside the inner tank 200. External water supply can enter the water inlet channel 14 from the side water inlet 131 and enter the inner tank 200 through the water inlet channel 14; the (hot) water in the inner tank 200 can flow into the water outlet inner pipe 12 from one end (i.e., the upper end) of the water outlet inner pipe 12 extending into the inner tank 200, and flow out through the water outlet inner pipe 12 and the water outlet through hole 111 to be sent to the water using end (such as a shower or a faucet, etc.) of the water heater 1000.

[0065] Optionally, the water outlet inner pipe 12 and the water delivery outer pipe can both be straight pipes extending in the up and down direction, and the extending direction of the water outlet through hole 111 is the same as the length direction of the water outlet inner pipe 12 to simplify the structure. Of course, in other embodiments, the water outlet through hole 111 can also be a bent hole, etc.

[0066] Specifically, a water outlet interface 112 is provided at the lower end of the connecting base 11 (i.e., the end facing away from the water outlet inner pipe 12 and the water inlet outer pipe 13) for connecting the water using outlet pipe, and the extending direction of the water outlet interface 112 is the same as the extending direction of the water outlet inner pipe 12. Optionally, the water outlet interface 112 includes a water outlet inner interface 1121 integrally provided with the connecting base 11 and a water outlet metal outer interface 1122 provided outside the water outlet inner interface 1121.

[0067] In the present invention, by arranging one ends of both the water outlet inner pipe 12 and the water inlet outer pipe 13 on the connecting base 11, a water inlet channel 14 can be formed between the water inlet outer pipe 13, the water outlet inner pipe 12 and the connecting base 11, so that external water supply can be sent into the inner tank 200 through this water inlet channel 14; at the same time, by connecting the water outlet inner pipe 12 with the water outlet through hole 111 on the connecting base 11, a water outlet channel can be formed, so that the (hot) water in the inner tank 200 can flow out through this water outlet channel, that is, the connecting water pipe 10 has both a water inlet channel 14 for sending water into the inner tank 200 and a water outlet channel for sending the water in the inner tank 200 out. Thus, the number of openings on the outer shell of the water heater 1000 and the inner tank 200 can be reduced, and only one water pipe interface needs to be welded on the inner tank 200, thereby simplifying the processing technology of the inner tank 200, and also simplifying the assembly process of the water heater 1000, reducing the production cost; moreover, it can also reduce processing quality problems such as water leakage caused by processes such as welding.

[0068] Moreover, since one ends of the water outlet inner pipe 12 and the water inlet outer pipe 13 are integrally provided on the connection base 11, on the one hand, corresponding assembly steps can be avoided, simplifying the installation process; on the other hand, the risk of water leakage can also be reduced.

[0069] Specifically, the connecting water pipe 10 is made of an insulating material such as plastic.

[0070] Further, as Figure 9 and 11 shown, the water outlet inner pipe 12 and the water inlet outer pipe 13 are arranged at intervals to form a water inlet channel 14 between the water outlet inner pipe 12 and the water inlet outer pipe 13. In this way, the space can be utilized to a greater extent.

[0071] Optionally, the water outlet inner pipe 12 and the water inlet outer pipe 13 are concentrically arranged. In this way, it is convenient to design the mold to reduce the production difficulty.

[0072] Of course, in other embodiments, the water outlet inner pipe 12 can also be offset inside the water inlet outer pipe 13 so that one side of the water outlet inner pipe 12 is integrally provided with the water inlet outer pipe 13, and in this way, a water inlet channel 14 can also be formed between the water outlet inner pipe 12 and the water inlet outer pipe 13.

[0073] In the present invention, by arranging the water inlet outer pipe 13 outside the water outlet inner pipe 12 to form a water inlet channel 14 between the water outlet inner pipe 12 and the water inlet outer pipe 13 using the water outlet inner pipe 12, it is beneficial to reduce the outer diameter or equivalent outer diameter of the water inlet outer pipe 13 (i.e., the connecting water pipe 10). In this way, it is beneficial to reduce the diameter or equivalent diameter of the water inlet and outlet on the inner tank 200, so as to be beneficial to enhancing / ensuring the strength of the inner tank 200.

[0074] In a specific embodiment, the water inlet outer pipe 13 can be set as a circular pipe or other forms of pipes such as square pipes, etc.; it can be understood that when the water inlet outer pipe 13 is a circular pipe, the outer diameter can be used to represent the thickness of the water inlet outer pipe 13; when the water inlet outer pipe 13 is a non-circular pipe, the equivalent diameter can be used to represent the thickness of the water inlet outer pipe 13. Among them, the equivalent outer diameter is the diameter of a circle with the same cross-sectional area as the non-circular pipe. Similarly, the water outlet inner pipe 12 can also be set as a circular pipe or other forms of pipes such as square pipes, etc.

[0075] Further, the outer diameter or equivalent outer diameter of the water inlet outer pipe 13 is greater than or equal to 22 mm and less than or equal to 50 mm, and can be, for example, 23 mm, 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 33 mm, 34 mm, 35 mm, 36 mm, 37 mm, 38 mm, 39 mm, 40 mm, 41 mm, 42 mm, 43 mm, 44 mm, 45 mm, 46 mm, 47 mm, 48 mm or 49 mm, etc.

[0076] It can be understood that if the outer diameter or equivalent outer diameter of the water inlet outer pipe 13 is too small, the water inlet channel 14 and the water outlet channel will be severely compressed, which is not conducive to increasing the water flow rate; if the outer diameter or equivalent outer diameter of the water inlet outer pipe 13 is too large, the diameter or equivalent diameter of the water inlet and outlet on the inner tank 200 will be too large, which is likely to reduce the strength of the inner tank 200.

[0077] In this embodiment, to reduce the production difficulty and the cooperation difficulty with other components, both the water inlet outer pipe 13 and the water outlet inner pipe 12 are provided as circular pipes.

[0078] In actual design, it can be understood that when water is sent into the inner tank 200 from the outside, it is usually sent to the bottom of the inner tank 200, which is conducive to water temperature stratification; when the (hot) water in the inner tank 200 is sent out, the (hot) water in the upper part of the inner tank 200 is usually sent out; thus, it is necessary to make the upper end of the water outlet inner pipe 12 (i.e., the end far from the connection base 11) protrude upward from the upper end of the water inlet outer pipe 13 (i.e., the end far from the connection base 11) so that the upper end of the water outlet inner pipe 12 is located in the upper part of the inner tank 200; however, this will undoubtedly increase the production difficulty of the connecting water pipe 10, such as difficult demolding (even impossible demolding), or high mold manufacturing difficulty (even impossible to manufacture), etc.

[0079] To solve this problem, in a further improvement of the present invention, the length of the connecting water pipe 10 is restricted, and an inner tank water outlet pipe 20 is added; in other words, the water outlet pipe is divided into two sections, one section is integrally provided on the connection base 11 to form the connecting water pipe 10, and the other section is assembled later. In this way, the manufacturing difficulty of the connecting water pipe 10 can be reduced.

[0080] Specifically, the water pipe assembly 100 further includes an inner tank water outlet pipe 20, and the inner tank is connected to the upper end of the water outlet inner pipe 12 (i.e., the end far from the connection base 11). Thus, by separately providing the inner tank water outlet pipe 20 at the upper end of the water outlet inner pipe 12, the length of the water outlet inner pipe 12 can be reduced, thereby reducing the length of the connecting water pipe 10, thereby reducing the demolding difficulty of the connecting water pipe 10, and thus reducing the manufacturing difficulty of the connecting water pipe 10.

[0081] Specifically, the inner tank water outlet pipe 20 can be set as a general standard part to reduce costs.

[0082] Furthermore, as Figure 9 shown, the ratio of the length L1 of the inner tank water outlet pipe 20 to the length L2 of the connecting water pipe 10 is greater than or equal to 0.9 and less than or equal to 3, and values such as 0.95, 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, or 2.9 can be taken.

[0083] It can be understood that if the ratio of the length L1 of the inner bladder outlet pipe 20 to the length L2 of the connecting pipe 10 is too small, the manufacturing difficulty of the connecting pipe 10 will be too great; if it is too large, the length of the connecting pipe 10 will be too small, thereby increasing the installation difficulty of the connecting pipe 10 and the inner bladder 200.

[0084] Furthermore, as Figure 9 shown, a plurality of water delivery holes 132 are provided at the upper end of the water inlet outer pipe 13, and the water delivery holes 132 communicate with the water inlet passage 14. In this way, the water in the water inlet passage 14 can be sent into the inner bladder 200 through the water delivery holes 132. Of course, in other embodiments, the water can also be directly sent into the inner bladder 200 from the upper pipe orifice of the water inlet outer pipe 13.

[0085] Furthermore, as Figure 9 and 10 shown, the water pipe assembly 100 further includes a connecting joint 30. One end of the connecting joint 30 is connected to the upper ends of the water outlet inner pipe 12 and the water inlet outer pipe 13 (i.e., the end far from the connecting base 11), and the lower end of the inner bladder outlet pipe 20 (i.e., the end facing the connecting base 11) is connected to the other end of the connecting joint 30. The connecting joint 30 has a water passage 31 that communicates the water outlet inner pipe 12 and the inner bladder outlet pipe 20.

[0086] In this way, by providing the connecting joint 30, it is convenient to connect the inner bladder outlet pipe 20 and the connecting pipe 10.

[0087] Specifically, the upper end of the water outlet inner pipe 12 is hermetically connected to the water passage 31 so that the water outlet inner pipe 12 communicates with the water passage 31; the lower end of the water inlet outer pipe 13 is hermetically connected to the water passage 31 so that the water inlet outer pipe 13 communicates with the water passage 31. In this way, the water passage 31 can communicate the water outlet inner pipe 12 and the inner bladder outlet pipe 20.

[0088] Of course, the upper end of the water outlet inner pipe 12 and the connecting joint 30, that is, the lower end of the water inlet outer pipe 13 and the connecting joint 30 can also be connected in other ways. For example, the lower end of the water inlet outer pipe 13 can be hermetically sleeved outside the connecting joint 30, or the upper end of the water outlet inner pipe 12 can be hermetically sleeved outside the connecting joint 30 or buried in the inner wall of the connecting joint 30.

[0089] Furthermore, as Figure 9 and 10 shown, spaced convex portions 32 are convexly provided on the inner wall surface of the water passage 31, and the inner bladder outlet pipe 20 and the water outlet inner pipe 12 are respectively arranged on both sides of the spaced convex portions 32. In this way, the spaced convex portions 32 can position the inner bladder outlet pipe 20 and the water outlet inner pipe 12 during assembly and can prevent the two from abutting.

[0090] Specifically, the spaced convex portions 32 can be arranged in a ring shape, or a plurality of (i.e., greater than or equal to two) are distributed in a ring shape, etc.

[0091] Further, as Figure 9 and 10 shown, the connection joint 30 further has a connection ring groove 33 located outside the communication channel, and the water inlet outer pipe 13 is hermetically connected to the connection ring groove 33. In this way, it is convenient to improve the connection strength between the water inlet outer pipe 13 and the connection joint 30.

[0092] Optionally, the inner tank outlet pipe 20 and the connection joint 30 can be connected by hot melt welding.

[0093] Optionally, the connection water pipe 10 and the connection joint 30 can be connected by hot melt welding.

[0094] Further, as Figure 3 、 9 and 11 shown, the water inlet outer pipe 13 includes a mounting section 133 connected to the connection base 11 and a water delivery section 134 connected to the mounting section 133, and the wall thickness of the mounting section 133 is greater than the wall thickness of the water delivery section 134.

[0095] Specifically, the water delivery holes 132 are provided in the water delivery section 134.

[0096] It can be understood that the lower part of the water inlet outer pipe 13 needs to be connected to the inner tank 200. To improve the connection reliability, a higher strength is required, that is, a thicker wall thickness is needed; while the upper part of the water inlet outer pipe 13 only needs to deliver water into the inner tank 200, and a lower strength is required, so its wall thickness can be reduced. In this way, the production cost can be reduced.

[0097] Further, as Figure 3 、 9 and 11 shown, the water pipe assembly 100 further includes a diversion pipe 40. The diversion pipe 40 is arranged outside the water inlet outer pipe 13. The diversion pipe 40 corresponds to the water delivery section 134. A plurality of diversion holes 41 are provided on the diversion pipe 40, and the diameter or equivalent diameter of the diversion holes 41 is smaller than the diameter or equivalent diameter of the water delivery holes 132.

[0098] Specifically, the diversion pipe 40 is spaced from the water delivery section 134.

[0099] In this way, the water entering the inner tank 200 can be shunted again, so that the water entering the inner tank 200 is more evenly distributed, which is convenient for heating.

[0100] Specifically, as Figure 3 、 9 and 11 shown, the wall thickness of the diversion pipe 40 is smaller than the wall thickness of the water delivery section 134.

[0101] Further, as shown in Figure 3 , 9 and 11, the outer pipe wall of the installation section 133 protrudes outward from the outer pipe wall of the water delivery section 134, so that the wall thickness of the installation section 133 is greater than that of the water delivery section 134. In this way, the inner pipe wall surface of the water outlet inner pipe 12 can be a flat surface.

[0102] Further, as shown in Figure 3 , 9 and 11, an installation ring groove 135 is provided at one end of the outer pipe wall surface of the installation section 133 away from the connection base 11, and one end (i.e., the lower end) of the diversion pipe 40 is installed in the installation ring groove 135. In this way, it is convenient to limit the lower end of the diversion pipe 40, and it is convenient to prevent the diversion pipe 40 from protruding laterally from the installation section 133, so that the water pipe assembly 100 can extend into the inner tank 200 through the water passing port.

[0103] Optionally, the lower end of the diversion pipe 40 and the installation section 133 can be connected by hot melt welding.

[0104] Further, as shown in Figure 3 , 9 and 11, the connection joint 30 further has a receiving step 34 located outside the connection ring groove 33, and the other end (i.e., the upper end) of the diversion pipe 40 is installed at the receiving step 34. In this way, it is convenient to limit the upper end of the diversion pipe 40.

[0105] Optionally, the upper end of the diversion pipe 40 and the connection joint 30 can be connected by hot melt welding.

[0106] Specifically, the outer pipe wall surface of the diversion pipe 40 is flush with the outer pipe wall surface of the installation section 133. In this way, on the one hand, it is convenient for the water pipe assembly 100 to extend into the inner tank 200 through the water passing port, and on the other hand, the aesthetics can be improved.

[0107] It should be noted that in some embodiments, the diversion member may not be provided.

[0108] In another embodiment of the present invention, in order to further reduce the manufacturing difficulty of the connecting water pipe 10, the length of the connecting water pipe 10 can be further reduced, but another section of the water inlet pipe needs to be added to form a water delivery structure. That is, as shown in Figure 16-19 , the water pipe assembly 100 may further include an inner tank water inlet pipe 51 and an inner tank water outlet pipe 20. The inner tank water outlet pipe 20 is connected to the water outlet inner pipe 12, the inner tank water inlet pipe 51 is connected to the water inlet outer pipe 13, the inner tank water inlet pipe 51 is arranged outside the inner tank water outlet pipe 20, and an inner tank water delivery channel communicating with the water inlet channel 14 is formed between the inner tank water inlet pipe 51 and the inner tank water outlet pipe 20.

[0109] In this embodiment, further, as Figure 19 shown, the wall thickness of the inner water inlet pipe 51 in the bile is smaller than that of the outer water inlet pipe 13. In this way, the cost of the inner water inlet pipe 51 in the bile can be reduced.

[0110] In this embodiment, further, as Figure 19 shown, a plurality of water delivery holes 132 communicating with the water delivery channel are provided on the inner water inlet pipe 51 in the bile.

[0111] In this embodiment, the plurality of water delivery holes 132 are distributed in the middle of the inner water inlet pipe 51 in the bile.

[0112] It can be understood that since the inner water inlet pipe 51 in the bile is an independent structural member, the water delivery holes 132 thereon can be processed very small, so there is no need to add a flow guiding member.

[0113] In this embodiment, further, as Figure 19 shown, a connecting ring convex 21 is convexly provided on the outer wall surface of the inner bile outlet pipe 20, and the upper end of the inner water inlet pipe 51 in the bile is hermetically connected to the connecting ring convex 21.

[0114] In this way, on the one hand, the upper end of the inner water inlet pipe 51 in the bile can be limited, and on the other hand, the upper end of the inner water inlet pipe 51 in the bile can be sealed.

[0115] In this embodiment, further, as Figure 16 、 17 and 19 shown, the water pipe assembly 100 further includes a connecting sleeve 52, and the connecting sleeve 52 is hermetically arranged outside the connection between the inner water inlet pipe 51 in the bile and the outer water inlet pipe 13. In this way, by providing the connecting sleeve 52, on the one hand, the connection strength between the inner water inlet pipe 51 in the bile and the outer water inlet pipe 13 can be improved, and on the other hand, it is also beneficial to improve the connection tightness between the two.

[0116] In this embodiment, specifically, the connecting sleeve 52 can be welded outside the inner water inlet pipe 51 in the bile by hot melt welding.

[0117] In this embodiment, specifically, as Figure 19 shown, a sealing ring is provided between the connecting sleeve 52 and the outer water inlet pipe 13.

[0118] In this embodiment, further, as Figure 16 、 17 and 19 shown, the water pipe assembly 100 further includes a connecting member, a supporting portion 136 is convexly provided on the outer wall surface of the outer water inlet pipe 13, and the connecting member connects the supporting portion 136 and the connecting sleeve 52 so that the connecting sleeve 52 is fixed at the connection between the inner water inlet pipe 51 in the bile and the outer water inlet pipe 13.

[0119] In this embodiment, specifically, as Figure 16 , 17 and as shown in FIG. 19, the connecting member includes a fork buckle 53 and a long connecting column 54. The fork buckle 53 is fork-connected to the connecting sleeve 52, and the long connecting column 54 connects the fork buckle 53 and the support portion 136.

[0120] Optionally, the fork buckle 53 includes a fixed base 532 and a U-shaped fork 531 connected to the fixed base 532. A limiting fork groove 521 is provided on the side surface of the connecting sleeve 52. The U-shaped fork 531 is fork-connected in the limiting fork groove 521, and the long connecting column 54 connects the fixed base 532 and the support portion 136.

[0121] In this embodiment, the long connecting column 54 can be selected as a bolt, a connecting pin, or the like.

[0122] In this embodiment, specifically, as Figure 16 , 17 and as shown in FIG. 19, an inner limiting step is formed at the upper end of the inner wall surface of the inner water outlet pipe 12, and the lower end of the inner water pipe 20 in the tank is provided at this inner limiting step.

[0123] In this embodiment, specifically, as Figure 16 , 17 and as shown in FIG. 19, an outer limiting step is formed at the upper end of the outer wall surface of the outer water inlet pipe 13, and the lower end of the inner water pipe 51 in the tank is provided at this outer limiting step.

[0124] It should be noted that, compared with the structural form of the connecting water pipe 10 in the above embodiments, in other embodiments, the connecting water pipe 10 can also have a water inlet channel 14 for sending water into the inner tank 200 and a water outlet channel for sending the water in the inner tank 200 out through other forms. For example, a straight plate-shaped, arc-shaped, or S-shaped partition plate extending along the length direction of the connecting water pipe 10 can be provided in the connecting water pipe 10 to partition and form a water inlet channel 14 and a water outlet channel in the connecting water pipe 10; and a water outlet interface 112 communicating with the water outlet channel can be provided at the lower end of the connecting water pipe 10, and the extending direction of the center line of the water outlet interface 112 is consistent with the length direction of the connecting water pipe 10; and a side water inlet 131 communicating with the water inlet channel 14 can be provided on the connecting water pipe 10; and so on.

[0125] It can be understood that for the water pipe assembly 100 in the above embodiments, the problem of the water inlet anti-electricity wall also needs to be solved.

[0126] Further, as Figure 4 , 5As shown in FIGS. 9 or 16 - 19, the water pipe assembly 100 further includes an external water inlet pipe 80 disposed outside the connecting water pipe 10 (hereinafter, taking the connecting water pipe 10 including a connecting base 11, a water outlet inner pipe 12, and a water inlet outer pipe 13 as an example for illustration). The external water inlet pipe 80 has a water inlet flow channel 81 communicating with the water inlet flow channel 81.

[0127] Specifically, the water inlet flow channel 81 communicates with the side water inlet 131 to communicate with the water inlet channel 14 through the side water inlet 131.

[0128] It can be understood that in the present invention, by providing the external water inlet pipe 80 with the water inlet flow channel 81 outside the water inlet outer pipe 13, a water resistance can be formed outside the inner tank 200 to form a water inlet anti - electric - shock wall structure outside the inner tank 200. Thus, on the one hand, it is possible to avoid setting a water inlet anti - electric - shock wall structure inside the inner tank 200 to save the space inside the tank; on the other hand, it is also convenient to set the water delivery hole 132 close to the bottom of the inner tank 200. When delivering water into the inner tank 200, the water is delivered to the bottom of the inner tank 200 to form a water temperature stratification. In this way, the stratification principle of hot water can be utilized, and the cold water at the bottom of the inner tank 200 can squeeze the hot water at the top of the inner tank 200 out of the inner tank 200 through the inner tank water outlet pipe 20 in turn, thereby improving the hot water output rate of the water heater 1000.

[0129] Furthermore, as Figure 14 shown in FIGS. 18 or 11, the water inlet flow channel 81 extends in a meandering or rotational manner. In this way, the space utilization rate can be improved, and the total length of the water inlet flow channel 81 can be effectively increased under a limited volume, so as to increase the water path resistance and have a better anti - leakage effect.

[0130] Furthermore, as Figure 4 、 5 shown in FIGS. 9 or 16 - 19, the external water inlet pipe 80 is disposed on one side of the water inlet outer pipe 13.

[0131] In this way, by disposing the external water inlet pipe 80 on one side of the water inlet outer pipe 13, it is convenient to make the overall structural form of the water pipe assembly 100 consistent or similar to the overall structural form of separately setting a water inlet pipe and a water outlet pipe in the prior art, so as to facilitate the use of existing common components and reduce the production cost.

[0132] Moreover, it is also convenient to assemble the external water inlet pipe 80 and the water inlet pipe (when the two are separately provided).

[0133] Furthermore, as Figure 4 、 5As shown in Figures 9, or 16-19, the external water inlet pipe 80 includes a water pipe body 82 and a steering head 83, the water pipe body 82 has a plurality of (i.e., greater than or equal to two) branch channels 821 extending along the length direction of the body, one end of the water pipe body 82 is connected to the water inlet outer pipe 13, one of the branch channels 821 is connected to the side water inlet 131; the steering head 83 is installed at the other end of the water pipe body 82, a steering channel 831 is provided in the steering head 83, the steering channel 831 connects the two branch channels 821, so that the water in one of the branch channels 821 is diverted and flows to the other branch channel 821, so as to form a rotating and extended water inlet channel 81.

[0134] In this way, the external water inlet pipe 80 is divided into a water pipe body 82 and a turning head 83, and the water pipe body 82 has a plurality of branch channels 821 extending along the length direction of the body, and the turning head 83 has a turning channel 831 connecting two branch channels 821 to make them turn, so that a rotating and extending water inlet channel 81 can be formed. In addition, the manufacturing difficulty can be reduced.

[0135] Furthermore, if Figure 4 , 5 As shown in Figures 9, 16-19, the water pipe body 82 includes a plurality of branch pipe bodies, each of which is provided with a branch flow channel 821. In this way, the difficulty of manufacturing the water pipe body 82 can be reduced.

[0136] Furthermore, if Figure 4 , 5 As shown in 9, or 16-19, a plurality of said branch pipe bodies are integrally arranged. Specifically, the pipe walls of adjacent branch pipe bodies are integrally arranged. In this way, the assembly process can be simplified.

[0137] It is understandable that the number of the branch channels 821 is usually greater than the number of the diverting channels 831. The diverting channels 831 and the branch channels 821 can be designed according to factors such as the number of the branch channels 821, the position of the water inlet interface 86, and the initial flow direction of the water inlet, as described below with examples.

[0138] In actual applications, it is necessary to set a water inlet interface 86 (the water inlet interface 86 is connected to one of the branch channels 821) on the water pipe body 82 or the steering head 83 for connecting to an external water supply pipe so that the external water supply enters the water inlet channel 81 through the water inlet interface 86 and flows into the water inlet channel 14 through the water inlet channel 81, which are explained separately below.

[0139] It should be noted that, for the design in which the water inlet interface 86 is provided on the steering head 83 , the branch flow channel 821 connected to the water inlet interface 86 does not need to be connected to the steering flow channel 831 .

[0140] In one embodiment, ifFigure 4 , 5 As shown in FIG. 9 , the external water inlet pipe 80 also includes a water inlet interface 86 , which is located at the lower side of the steering head 83 and connected to the steering head 83 . The steering head 83 also has a steering connection channel 832 connecting the water inlet interface 86 and one of the branch channels 821 .

[0141] It can be understood that since the water inlet interface 86 is arranged on the steering head 83, the initial water inlet direction of the water inlet channel 81 is toward the connecting base 11, and the number of branch channels 821 can be set to an odd number greater than or equal to 3, such as 3 or 5.

[0142] In one embodiment, if Figure 4 , 5 As shown in Figure 9, the branch flow channel 821 is provided with three, which are respectively the first flow channel 821a, the second flow channel 821b, and the third flow channel 821c connected to the side water inlet 131. The diverting connecting flow channel 832 connects the water inlet interface 86 with the first flow channel 821a. The diverting flow channel 831 is provided with a to connect the second flow channel 821b and the third flow channel 821c; the other end of the first flow channel 821a is connected with the other end of the second flow channel 821b. Correspondingly, the water pipe body 82 includes three branch pipe bodies, each of which is provided with a branch flow channel 821; optionally, it can be arranged in a manner of "two branch pipe bodies on top and one branch pipe body on the bottom", or in a manner of "one branch pipe body on top and two branch pipe bodies on the bottom".

[0143] It can be understood that if there are five branch flow channels 821 , then one turning flow channel 831 can be added accordingly.

[0144] Furthermore, if Figure 4 , 5 As shown in Figures 9 and 10, the water inlet outer pipe 13 is convexly provided with a water inlet convex portion 137, and the water pipe body 82 is connected to the water inlet convex portion 137. The water inlet convex portion 137 has a water inlet channel 1371 connecting the side water inlet 131 and the third flow channel 821c, and a transfer channel 1372 connecting the other end of the first flow channel 821a and the other end of the second flow channel 821b.

[0145] In this way, the water inlet interface 86, the first flow channel 821a, the turning flow channel 1372, the second flow channel 821b, the turning flow channel 831 and the third flow channel 821c form a rotating and extending water inlet flow channel 81.

[0146] Optionally, one end of the water pipe body 82 may be inserted into the water inlet protrusion 137 to improve connection reliability.

[0147] Optionally, the water pipe 10 body and the water inlet protrusion 137 may be connected by hot-melt welding.

[0148] In another embodiment, reference may be made to Figure 4 and 5 and 9, the water inlet interface 86 may be located on the lower side of the water pipe body 82 and connected to the water pipe body 82, and the water inlet interface 86 communicates with one of the flow splitting channels 821.

[0149] It can be understood that the flow splitting channel 821 communicating with the water inlet interface 86 can extend in the direction close to the connection base 11, so that the initial water inlet direction of the water inlet flow channel 81 is in the direction towards the connection base 11. At this time, the number of the flow splitting channels 821 can be set to an odd number greater than or equal to 3, such as 3 or 5, etc. The flow splitting channel 821 communicating with the water inlet interface 86 can also extend in the direction close to the steering head 83, so that the initial water inlet direction of the water inlet flow channel 81 is in the direction towards the steering head 83. At this time, the number of the flow splitting channels 821 can be set to an even number greater than or equal to 2, such as 2 or 4, etc., and the number of the steering flow channels 831 is one less than the number of the flow splitting channels 821.

[0150] For example, as Figure 16-19 shown, two flow splitting channels 821 may be provided, and one steering flow channel 831 may be provided to communicate with the two flow splitting channels 821, and one of them communicates with the water inlet joint, and the other communicates with the side water inlet 131.

[0151] It should be noted that for the above embodiments, especially when the number of the flow splitting channels 821 and the flow splitting pipes is small, such as 2 or 3, the water pipe body 82 and the water inlet outer pipe 13 may be integrally provided to reduce the assembly process.

[0152] It should be noted that in the above embodiments, the total length of the water inlet flow channel 81 is greater than or equal to 100 millimeters and less than or equal to 300 millimeters. For example, 110 millimeters, 120 millimeters, 130 millimeters, 140 millimeters, 150 millimeters, 160 millimeters, 170 millimeters, 180 millimeters, 190 millimeters, 200 millimeters, 210 millimeters, 220 millimeters, 230 millimeters, 240 millimeters, 250 millimeters, 260 millimeters, 270 millimeters, 280 millimeters or 290 millimeters can be taken.

[0153] It can be understood that according to the water resistance calculation formula \(R = ho L / S\) and the leakage current calculation formula \(I = U / R\) during leakage, where \(ho = 1250\ \Omega\cdot m\) and \(U\) is usually \(220\ V\). It can be seen that when the total length of the water inlet flow channel 81 is smaller, in order to make the leakage current meet the national standard, the inner diameter or equivalent inner diameter of the water inlet flow channel 81 is also smaller, which is not conducive to increasing the water flow rate; when the total length of the water inlet flow channel 81 is larger, on the premise that the leakage current meets the national standard, the diameter or equivalent diameter of the water inlet flow channel 81 can be increased to increase the water flow rate; therefore, it is necessary to limit the total length of the water inlet flow channel 81 within a suitable range, such as making the total length of the water inlet flow channel 81 greater than or equal to 120 millimeters and less than or equal to 250 millimeters.

[0154] Furthermore, the inner diameter or equivalent inner diameter of the water inlet flow channel 81 can be made greater than or equal to 3.5 millimeters and less than or equal to 8 millimeters. In this way, not only can the range of the leakage current be between 1.69 - 8.84 mA to meet the national standard, but also the water inlet flow channel 81 can have a larger water flow rate.

[0155] It should be noted that for the above embodiments, the positions of the water outlet joint and the water inlet joint can be the same as the positions of the water inlet pipe and the water outlet pipe respectively in the prior art, so that the existing anti-electricity wall covers can be used, thereby saving the cost of newly opening the anti-electricity wall cover molds and reducing the production cost.

[0156] Of course, in other embodiments, other ways can also be used to arrange the external water inlet pipe 80. For example, the external water inlet pipe 80 can be bent or folded to wind around the water inlet flow channel 81 on the periphery of the connecting water pipe 10; and so on.

[0157] It can be understood that compared with the water pipe assembly 100 in the above embodiments, in a further embodiment of the present invention, the problem of water flow rate monitoring also needs to be solved.

[0158] Furthermore, as Figure 4 、 5 shown in Figures 8, 9 and 12, the water pipe assembly 100 further includes a flow sensor 90. The flow sensor 90 includes a magnetic rotor 91 disposed in the water inlet flow channel 81 and a Hall element 92 disposed outside the external water inlet pipe 80. Specifically, the Hall element 92 is located on one side of the rotation axis of the magnetic rotor 91.

[0159] Specifically, the magnetic rotor 91 is made of a magnetic material such as a magnet and has magnetism. When the water in the water inlet flow channel 81 flows, it will drive the magnetic rotor 91 to rotate. When the magnetic rotor 91 rotates, the change of the magnetic poles can be sensed by the Hall element 92, so that a feedback signal can be sent to the control unit of the water heater 1000, thereby realizing the monitoring of the water flow rate in the water inlet flow channel 81, enabling the control unit to achieve functions such as water consumption statistics and water cut-off when the water runs out. Moreover, it can also prompt the user to clean the whole machine regularly, etc.

[0160] In specific applications, the flow sensor 90 can be arranged on the water pipe main body 82. At this time, the magnetic rotor 91 can be arranged in one of the flow dividing channels 821, and the Hall element 92 is arranged outside the water pipe main body 82; the flow sensor 90 can also be arranged on the steering head 83. At this time, the magnetic rotor 91 can be arranged in the steering flow channel 831 or the steering connection flow channel 832, and the Hall element 92 is arranged outside the steering head 83.

[0161] Specifically, as Figure 4 、 5 shown in Figures 8, 9 and 12, the magnetic rotor 91 is arranged in the steering flow channel 831, and the Hall element 92 is arranged outside the steering head 83.

[0162] Furthermore, as Figure 4 、 5 shown in Figures 8, 9 and 12, the steering connection flow channel 832 includes a first flow segment 8321 whose extending direction is the same as the length direction of the water pipe main body 82, and a second flow segment 8322 whose extending direction is the same as the extending direction of the center line of the water inlet interface 86. The first flow segment 8321 intersects and communicates with the second flow segment 8322. The first flow segment 8321 communicates with one of the flow dividing channels 821, and the second flow segment 8322 communicates with the water inlet interface 86. In this way, the water in the water inlet interface 86 can be sent into the flow dividing channel 821 after turning through the second flow segment 8322 and the first flow segment 8321.

[0163] Furthermore, as Figure 4 、 5 shown in Figures 8, 9 and 12, the magnetic rotor 91 is arranged in the second flow segment 8322.

[0164] Furthermore, as Figure 4 、 5As shown in FIGS. 8, 9 and 12, the external water inlet pipe 80 further includes a plug 84. The swivel head 83 further has a mounting port 833 communicating with the second flow section 8322. The extending direction of the center line of the mounting port 833 is the same as the extending direction of the second flow section 8322. The magnetic rotor 91 is configured to be mounted in the second flow section 8322 through the mounting port 833, and the plug 84 is sealingly connected to the mounting port 833. In this way, the installation of the magnetic rotor 91 can be made simple and convenient.

[0165] Specifically, the plug 84 is provided with an external thread, and the inner wall surface of the mounting port 833 is provided with an internal thread, so that the plug 84 is threadedly connected to the mounting port 833.

[0166] Further, as Figure 4 、 5 As shown in FIGS. 8, 9 and 12, a limiting step is formed in the second flow section 8322. The plug 84 includes a stop convex column 841. One end of the magnetic rotor 91 is limited at the limiting step, and the stop convex column 841 abuts against the other end of the magnetic rotor 91. In this way, the magnetic rotor 91 can be limited in the second flow section 8322.

[0167] Further, as Figure 4 、 5 As shown in FIGS. 8, 9 and 12, the swivel head 83 includes a swivel column 834 and a connecting column 835 protruding from one side of the swivel column 834. The water inlet interface 86 is connected to the lower end of the swivel column 834. The mounting port 833 and the second flow section 8322 are both provided in the swivel column 834, and the Hall element 92 is arranged outside the swivel column 834; the connecting column 835 is connected to the water pipe main body 82. Specifically, the first flow channel 821a section and the swivel flow channel 831 can both be provided in the connecting column 835, or the first flow channel 821a section and the swivel flow channel 831 can both be partially provided in the connecting column 835 and partially provided in the swivel column 834, or the first flow channel 821a section can be partially provided in the connecting column 835 and partially provided in the swivel column 834, but the swivel flow channel 831 is provided in the connecting column 835, and so on.

[0168] In this way, it is convenient to connect the swivel head 83 to the water pipe main body 82.

[0169] Specifically, the swivel flow channel 831 can be set as a U-shaped flow channel or a confluence groove, etc.

[0170] Further, as Figure 4 、 5 As shown in FIGS. 8, 9 and 12, a mounting plane 8341 is formed on one side of the swivel column 834, and the Hall element 92 is mounted on the mounting plane 8341. In this way, it is convenient to install the Hall element 92 and the installation reliability of the Hall element 92 can be improved.

[0171] Specifically, the installation plane 8341 is disposed on a side of the steering column 834 away from the connection base 11.

[0172] Specifically, fixing posts are convexly provided on the surface of the steering column 834, and the Hall element 92 is connected to the fixing posts.

[0173] Optionally, there are two fixing posts, which are respectively disposed on both sides of the steering column 834.

[0174] Optionally, the fixing post is a threaded hole post.

[0175] It should be noted that in other embodiments, the magnetic rotor 91 can also be arranged in the first flow section 8321, and a side-mounted inlet can be provided on the side surface of the steering head 83 to install the magnetic rotor 91; and the Hall element 92 can be arranged at the upper end of the steering head 83.

[0176] It should be noted that in some embodiments, the flow sensor 90 may not be provided.

[0177] It can be understood that for the water pipe assembly 100 in the above embodiments, in a further embodiment of the present invention, the problem that the connecting water pipe 10 is easily damaged still needs to be solved.

[0178] Furthermore, as shown in Figure 2 、 4 、5, 8, 9 and 12, the external water inlet pipe 80 further includes auxiliary fixing feet 85 for connecting with the shell of the water heater 1000.

[0179] Specifically, the auxiliary fixing feet 85 can be disposed on the water pipe main body 82 or the steering head 83.

[0180] In this way, by adding the auxiliary fixing feet 85 on the external water inlet pipe 80 to connect with the shell of the water heater 1000, the connection strength and stability between the water pipe assembly 100 and the inner tank 200 and the shell can be increased, the risk of the connecting water pipe 10 being twisted and damaged and the joint between the external water inlet pipe 80 and the connecting water pipe 10 cracking can be reduced, thereby increasing the reliability of the water pipe assembly 100 and the water heater 1000.

[0181] Furthermore, as shown in Figure 2 、 4 、5, 8, 9 and 12, the external water inlet pipe 80 is disposed on one side of the connecting water pipe 10, and the auxiliary fixing feet 85 are located at one end of the external water inlet pipe 80 away from the connecting water pipe 10.

[0182] Specifically, the auxiliary fixing feet 85 can be disposed at one end of the water pipe main body 82 away from the connecting water pipe 10 or on the steering head 83. In this embodiment, as shown inFigure 2 , 4 , as shown in Figures 5, 8, 9 and 12, the auxiliary fixing leg 85 is provided on the steering head 83.

[0183] In this way, the connection position of the auxiliary fixing leg 85 and the housing is far away from the connecting water pipe 10.

[0184] Specifically, as Figure 2 , 4 , as shown in Figures 5, 8, 9 and 12, the auxiliary fixing leg 85 is provided on the steering column 834 of the steering head 83.

[0185] Furthermore, as Figure 2 , 4 , as shown in Figures 5, 8, 9 and 12, the auxiliary fixing leg 85 is provided on the side of the steering column 834 away from the connecting water pipe 10. In this way, on the one hand, the connection position of the auxiliary fixing leg 85 and the housing can be made farther away from the connecting water pipe 10, and on the other hand, the installation interference can be reduced to facilitate the connection of the auxiliary fixing leg 85 and the housing.

[0186] Specifically, the auxiliary fixing leg 85 is provided at the upper end of the steering column 834.

[0187] Specifically, the auxiliary fixing leg 85 is located above the installation plane 8341.

[0188] Furthermore, as Figure 2 , 4 , as shown in Figures 5, 8, 9 and 12, the auxiliary fixing leg 85 is integrally provided with the steering column 834. In this way, on the one hand, the structure can be simplified, and on the other hand, the corresponding assembly steps can be reduced.

[0189] Furthermore, the auxiliary fixing leg 85 is provided in a plate shape. In this way, the structure can be easily simplified to facilitate the connection with the housing. Of course, in other embodiments, the auxiliary fixing leg 85 can also be set as a block shape or a column shape, etc., such as making the auxiliary fixing leg 85 a screw hole column, etc.

[0190] Optionally, a connecting rib is further provided between the auxiliary fixing leg 85 and the steering column 834.

[0191] Furthermore, as Figure 2 , 4 , as shown in Figures 5, 8, 9 and 12, screw through holes (not labeled in the figure) are provided on the auxiliary fixing leg 85. Specifically, screws pass through the screw through holes to connect the auxiliary fixing leg 85 to the housing.

[0192] In this way, the connection between the auxiliary fixing leg 85 and the housing can be made simple, convenient and firm.

[0193] Of course, in other embodiments, other methods may also be adopted to connect the auxiliary fixing feet 85 to the housing. For example, the auxiliary fixing feet 85 may be provided with snap structures for snap-connecting to the housing, so as to connect the auxiliary fixing feet 85 to the housing through the snap structures; and so on.

[0194] It can be understood that for the water pipe assembly 100 in the above embodiments, in a further embodiment of the present invention, the problem of connecting the connecting water pipe 10 to the inner tank 200 also needs to be considered.

[0195] It can be understood that in actual application, a water pipe joint 210 is usually provided at the water passing port of the inner tank 200. The connecting water pipe 10 extends into the inner tank 200 through the water pipe joint 210 and the water passing port, and the connecting water pipe 10 is connected to the water pipe joint 210 to fix the connecting water pipe 10 to the inner tank 200. The connection problem between the water pipe assembly 100 and the inner tank 200 will be further described below based on the water pipe joint 210.

[0196] Furthermore, as Figure 2-7 shown in FIGS. 9 and 11, the water pipe assembly 100 further includes an adapter 60. The adapter 60 is disposed outside the connecting water pipe 10. The adapter 60 includes a first adapter section 61 that is hermetically connected to the connecting water pipe 10, and a second adapter section 62 that is connected to one end of the first adapter section 61. The second adapter section 62 is used for hermetically connecting to the water pipe joint 210.

[0197] Specifically, the first adapter section 61 is hermetically connected to the outer water inlet pipe 13 (this part of the content is described by taking the connecting water pipe 10 including a connecting base 11, an inner water outlet pipe 12, and an outer water inlet pipe 13 as an example). A joint groove is formed between the second adapter section 62 and the outer water inlet pipe 13. The water pipe joint 210 extends into the joint groove to be hermetically connected to the second adapter section 62.

[0198] Specifically, by hermetically connecting the first adapter section 61 outside the connecting water pipe 10, water in the inner tank 200 can be prevented from leaking from the connection between the first adapter section 61 and the connecting water pipe 10; by hermetically connecting the second adapter section 62 to the water pipe joint 210, water in the inner tank 200 can be prevented from leaking from the connection between the second adapter section 62 and the water pipe joint 210, thereby preventing leakage inside the inner tank 200.

[0199] In this way, by adding the adapter 60 to connect the water pipe joint 210 of the inner tank 200 and the connecting water pipe 10, the connection difficulty between the two can be reduced, which is beneficial to improving the connection tightness.

[0200] It should be noted that for the solution of "the outer water inlet pipe 13 includes an installation section 133 and a water delivery section 134", the first adapter section 61 is hermetically connected to the installation section 133.

[0201] Furthermore, as shown in Figure 2-7 , 9 and 11, the inner diameter of the second adapter section 62 is larger than that of the first adapter section 61, so as to form a joint groove between the second adapter section 62 and the water inlet outer pipe 13.

[0202] Specifically, the inner surface of the second adapter section 62 is provided with internal threads for threaded connection with the water pipe joint 210.

[0203] Specifically, the outer peripheral surface of the water pipe joint 210 is provided with external threads. During assembly, the second adapter section 62 can be threadedly connected with the water pipe joint 210 by rotating the adapter 60, so that the adapter 60 is fixed on the inner tank 200.

[0204] In this way, by providing internal threads on the inner surface of the second adapter section 62 for threaded connection with the water pipe joint 210, not only can the connection between the adapter 60 and the water pipe joint 210 be made simple, convenient and firm, but also the connection sealing performance can be improved.

[0205] It should be noted that in practical applications, based on process requirements, the interior of the inner tank 200 generally needs to be enameled, and after enamel treatment, high-temperature curing is required, with the temperature reaching above 800 °C. Due to the fluidity of the enamel inside the inner tank 200, the inner wall surface of the water pipe joint 210 will be uneven, which is not conducive to the radial sealed connection between the water pipe 10 and the water pipe joint 210.

[0206] In the present invention, by providing the adapter 60 and making the inner wall surface of the second adapter section 62 of the adapter 60 threadedly connected with the outer peripheral surface of the water pipe joint 210, the connection between the water pipe 10 and the water pipe joint 210 will not be affected by the inner wall surface of the water pipe joint 210.

[0207] Of course, in other embodiments, other methods can also be used to form a joint groove between the second adapter section 62 and the water inlet outer pipe 13. For example, in one embodiment, the installation section 133 can include a first installation section hermetically connected to the first adapter section 61 and a second installation section corresponding to the second adapter section 62. The outer diameter of the second installation section is smaller than that of the first installation section, so as to form a joint groove between the second adapter section 62 and the second installation section.

[0208] Furthermore, as shown in Figure 2-7 , 9 and 11, the water pipe assembly 100 further includes a first annular seal 55, and the first annular seal 55 is used to be disposed between the end face of the first adapter section 61 and the joint end face of the water pipe joint 210.

[0209] Specifically, the first annular seal 55 is disposed outside the water inlet outer pipe 13.

[0210] Specifically, the inner diameter of the second transition section 62 is larger than that of the first transition section 61.

[0211] It can be understood that since the inner diameter of the second transition section 62 is larger than that of the first transition section 61, a stepped surface, i.e., the end surface of the first transition section 61, can be formed at the connection between the first transition section 61 and the second transition section 62. Thus, the end surface of the first transition section 61 can be abutted against the joint end surface of the water pipe joint 210, and a first annular seal 55 can be arranged between the two end surfaces, thereby forming an end surface seal, and further forming a connection structure of screw connection plus end surface seal.

[0212] In other words, in the present invention, the inner wall surface of the second transition section 62 is threadedly connected with the outer peripheral surface of the water pipe joint 210 to achieve the fastening function, and the sealing function is achieved through the end surface seal, that is, the sealing function and the fastening function are separated.

[0213] Specifically, the first annular member is a gasket, such as a rubber gasket or the like.

[0214] Further, as shown in Figure 2-7 Figures 9 and 11, the water pipe assembly 100 further includes a second annular seal 56, and the second annular seal 56 is arranged between the inner pipe wall surface of the first transition section 61 and the outer pipe wall surface of the connecting water pipe 10.

[0215] In this way, by arranging the second annular seal 56 between the inner pipe wall surface of the first transition section 61 and the outer pipe wall surface of the connecting water pipe 10, radial sealing can be achieved.

[0216] Specifically, the second annular seal 56 is arranged between the inner pipe wall surface of the first transition section 61 and the outer pipe wall surface of the water inlet outer pipe 13.

[0217] Specifically, the second annular seal 56 is optionally an O-ring or the like.

[0218] Further, as shown in Figure 2-7 Figures 9 and 11, an annular accommodation groove 138 is provided on the outer pipe wall surface of the connecting water pipe 10, and the second annular seal 56 is arranged in the annular accommodation groove 138. Specifically, the annular accommodation groove 138 is provided on the outer pipe wall surface of the water inlet outer pipe 13.

[0219] In this way, it is convenient to limit the second annular seal 56.

[0220] Further, as shown in Figure 2-7 Figures 9 and 11, a plurality of (i.e., greater than or equal to 2) second annular seals 56 are distributed at intervals in the length direction of the connecting water pipe 10, and 2, 3 or 4 etc. can be taken.

[0221] Specifically, a plurality (i.e., greater than or equal to 2) of the annular accommodating grooves 138 are distributed at intervals in the length direction of the connecting water pipe 10, and each of the annular accommodating grooves 138 is provided with a second annular seal 56.

[0222] Further, as Figure 2-7 shown in FIGS. 9 and 11, a first connecting convex portion 139 protrudes from the outer wall surface of the connecting water pipe 10, a second connecting convex portion 611 protrudes from the outer wall surface of the first adapter section 61, the first adapter section 61 abuts against the first connecting convex portion 139, and the second connecting convex portion 611 is connected to the first connecting convex portion 139, so that the connecting water pipe 10 is fixedly connected to the first adapter section 61.

[0223] Specifically, the first connecting convex portion 139 is provided on the outer wall surface of the water inlet outer pipe 13.

[0224] Specifically, the first adapter section 61 is provided between the water pipe connectors 210, the upper end surface of the first adapter section 61 abuts against the end surface of the water pipe connector 210, and the lower end surface of the first adapter section 61 abuts against the side surface of the first connecting convex portion 139.

[0225] Specifically, the adapter 60 is fixedly connected to the water pipe connector 210 of the inner tank 200 through the first adapter section 61, and the connecting water pipe 10 is connected to the adapter 60 through the second adapter section 62, so that the connecting water pipe 10 is fixedly connected to the inner tank 200.

[0226] Moreover, by protruding the first connecting convex portion 139 on the outer wall surface of the connecting water pipe 10 and protruding the second connecting convex portion 611 on the outer wall surface of the first adapter section 61, the adapter 60 and the connecting water pipe 10 can be connected by connecting the first connecting convex portion 139 to the second connecting convex portion 611, thereby reducing the connection difficulty.

[0227] Further, as Figure 2-7 shown in FIGS. 9 and 11, the second connecting convex portion 611 is provided at one end of the first adapter section 61, and the second connecting convex portion 611 abuts against the first connecting convex portion 139. In this way, on the one hand, it is beneficial to realize miniaturized design, and on the other hand, the connection stability can be improved. Of course, in other embodiments, the second connecting convex portion 611 may also be provided in the middle of the first adapter section 61, and there is a gap between the second connecting convex portion 611 and the first connecting convex portion 139.

[0228] Further, as Figure 2-7As shown in FIGS. 9 and 11, the first connecting convex portion 139 is annular, and / or, the first connecting convex portion 139 is annular. Thus, the design can be simplified. Of course, in other embodiments, the first connecting convex portion 139 may also include a plurality of first convex portions distributed in an annular shape, and / or, the second connecting convex portion 611 includes a plurality of second convex portions distributed in an annular shape.

[0229] In this embodiment, as Figure 2-7 shown in FIGS. 9 and 11, the first connecting convex portion 139 is annular, and the first connecting convex portion 139 is annular.

[0230] Further, the adapter 60 is made of a corrosion-resistant material (such as stainless steel, etc.); alternatively, the surface of the adapter 60 is provided with a corrosion-resistant layer (such as plating nickel and / or chromium on the surface of the adapter 60 made of (Q235) steel, or plating nickel and / or chromium on the surface of the adapter 60 made of zinc alloy, etc.).

[0231] Thus, the corrosion resistance of the adapter 60 can be improved to increase the service life.

[0232] In specific applications, there are various connection forms between the first connecting convex portion 139 and the second connecting convex portion 611, which are illustrated by the following examples.

[0233] Further, as Figure 2-7 shown in FIGS. 9, 11 and 13, the water pipe assembly 100 further includes a clamping member 70, and the clamping member 70 connects the first connecting convex portion 139 and the second connecting convex portion 611, that is, the first connecting convex portion 139 and the second connecting convex portion 611 are connected by the clamping member 70.

[0234] Thus, by connecting the first connecting convex portion 139 and the second connecting convex portion 611 through the clamping member 70, quick installation can be achieved.

[0235] Further, the clamping member 70 is a clamp.

[0236] Specifically, as Figure 2-7 shown in FIGS. 9, 11 and 13, the clamping member 70 includes a connecting substrate 71 and two clamping elastic pieces 72 respectively connected to both ends of the connecting substrate 71. The clamping elastic pieces 72 are provided with clamping holes 721 extending along the length direction of the clamping elastic pieces 72. The two clamping elastic pieces 72 are respectively disposed on both sides of the connecting water pipe 10, and the first connecting convex portion 139 and the second connecting convex portion 611 are clamped in the clamping holes 721.

[0237] Specifically, the two clamping elastic pieces 72 are respectively disposed on both sides of the water inlet outer pipe 13.

[0238] Specifically, a clamping hole 721 can be provided on each clamping elastic piece 72, and the first connecting convex part 139 and the second connecting convex part 611 are both clamped in the clamping hole 721; alternatively, two clamping holes 721 can be provided on each clamping elastic piece 72, and the first connecting convex part 139 and the second connecting convex part 611 are respectively clamped in the two clamping holes 721.

[0239] In this embodiment, as Figure 2-7 , 9, 11, and 13 show, a clamping hole 721 is provided on each clamping elastic piece 72.

[0240] Specifically, the two clamping elastic pieces 72 respectively abut against both sides of the connecting water pipe 10.

[0241] During assembly, an external force spreads the two clamping elastic pieces 72, so that the first connecting convex part 139 and the second connecting convex part 611 are clamped in the clamping hole 721. The two clamping elastic pieces 72 reset under the action of their own elastic force and respectively abut against both sides of the connecting water pipe 10, thereby mainly limiting the first connecting convex part 139 and the second connecting convex part 611 in the length direction (i.e., the axial direction) of the connecting water pipe 10.

[0242] Furthermore, as Figure 2-7 , 9, 11, and 13 show, the clamping elastic piece 72 includes an elastic support section 722 connected to the connecting substrate 71 and a clamping section 723 connected to the elastic support section 722. The clamping section 723 is arc-shaped, and the clamping section 723 elastically abuts against the first transition section 61 and the outside of the connecting water pipe 10.

[0243] In this way, by making the clamping section 723 arc-shaped, the limiting effect on the first transition section 61 and the connecting water pipe 10 can be enhanced.

[0244] Furthermore, as Figure 2-7 , 9, 11, and 13 show, the clamping section 723 includes a first clamping sub-section 7231 and a second clamping sub-section 7232 respectively provided on both sides of the clamping hole 721. The diameter of the first clamping sub-section 7231 is larger than the diameter of the second clamping sub-section 7232, so that the first clamping sub-section 7231 is adaptively provided outside the first transition section 61, and the second clamping sub-section 7232 is adaptively provided outside the connecting water pipe 10.

[0245] Specifically, it can be understood that since the first transition section 61 is provided outside the connecting water pipe 10, the outer diameter or equivalent outer diameter of the first transition section 61 is larger than the outer diameter of the connecting water pipe 10. Therefore, to improve the adaptability, the diameter of the first clamping sub-section 7231 is made larger than the diameter of the second clamping sub-section 7232.

[0246] As Figure 2-7, as shown in FIGS. 9, 11 and 13, the first latching sub-segment 7231 is located above the second latching sub-segment 7232.

[0247] Further, as Figure 2-7 , as shown in FIGS. 9, 11 and 13, a first side pressing piece 7233 is provided on the side edge of the second latching sub-segment 7232, and the first side pressing piece 7233 abuts against the first connecting convex portion 139; and / or, a second side pressing piece is provided on the side edge of the first latching sub-segment 7231, and the second side pressing piece abuts against the second connecting convex portion 611.

[0248] In this way, on the one hand, the structural strength of the first latching sub-segment 7231 and / or the second latching sub-segment 7232 can be improved, and on the other hand, the connection stability can also be improved.

[0249] In this embodiment, a first side pressing piece 7233 is provided on the side edge of the second latching sub-segment 7232, and the first side pressing piece 7233 abuts against the first connecting convex portion 139.

[0250] Further, as Figure 2-7 , as shown in FIGS. 9, 11 and 13, a first limiting portion is provided on the connecting water pipe 10, and the first limiting portion is used to limit the rotation of the latching member 70; and / or, a second limiting portion is provided on the first adapter segment 61, and the second limiting portion is used to limit the rotation of the latching member 70.

[0251] In this way, the relative rotation of the latching member 70 with respect to the connecting water pipe 10 and the adapter 60 can be prevented, so that the relative rotation of the connecting water pipe 10 and the adapter 60 can be prevented, so as to achieve complete limitation of the connecting water pipe 10 and the adapter 60.

[0252] In specific applications, there are many structural forms of the first limiting portion and / or the second limiting portion, which are illustrated by examples below.

[0253] Further, as Figure 2-7 , as shown in FIGS. 9, 11 and 13, the first limiting portion includes two first limiting plates 13a protruding from the outer wall surface of the connecting water pipe 10, and the two first limiting plates 13a are spaced apart in the circumferential direction of the connecting water pipe 10, and the two first limiting plates 13a are both located between the two elastic support segments 722, and one of the first limiting plates 13a abuts against one of the elastic support segments 722, and the other first limiting plate 13a abuts against the other elastic support segment 722 to limit the rotation of the latching member 70. Specifically, the first limiting plate 13a is provided on the water inlet outer pipe 13.

[0254] Specifically, the first limiting plate 13a is also connected to the first connecting convex portion 139 to enhance the structural strength.

[0255] Of course, in other embodiments, the first limiting portion can also be a first limiting protrusion protruding from the outer tube wall of the water pipe 10, and the first limiting protrusion is arranged between the two elastic support sections 722. The two side surfaces of the first limiting protrusion are respectively (used to) abut against the two elastic support sections 722 to limit the rotation of the clamping member 70; and so on.

[0256] Similarly, the second limiting portion may include two first limiting plates 13a protruding from the outer tube wall of the first transition section 61 ; or, the second limiting portion may be a second limiting block protruding from the outer tube wall of the first transition section 61 .

[0257] Furthermore, if Figure 2-7 As shown in FIGS. 9, 11 and 13, the clamping elastic piece 72 further includes a guide section 724 connected to the clamping section 723, and the guide section 724 extends obliquely in a direction away from the other clamping elastic piece 72. In this way, the clamping member 70 can be easily assembled.

[0258] It can be understood that, compared with connecting the first connecting protrusion 139 and the second connecting protrusion 611 by screwing, connecting the first connecting protrusion 139 and the second connecting protrusion 611 by the above-mentioned clamping member 70 can achieve quick installation.

[0259] Furthermore, if Figure 2-7 As shown in FIGS. 9, 11 and 13, the clamping member 70 further includes a plug-in piece 725 connected to the connecting substrate 71 or the clamping spring piece 72, and the plug-in piece 725 is used to connect to the leakage protection device.

[0260] Specifically, the plug-in piece 725 can be used to connect a leakage protection indicator light.

[0261] In this way, the safety of use can be improved.

[0262] Specifically, the plug-in piece 725 is disposed at a side edge of the engaging hole 721 close to the connecting substrate 71 , or the plug-in piece 725 is disposed at a lower side edge of the connecting substrate 71 .

[0263] It should be noted that, in other embodiments, other methods may be used to connect the first connecting protrusion 139 and the second connecting protrusion 611, such as the water pipe assembly 100 may also include a fastener (such as a screw or a connecting pin, etc.), and the fastener connects the first connecting protrusion 139 and the second connecting protrusion 611; and so on.

[0264] It should be noted that, in other embodiments, the clamping member 70 may also be configured as other structural forms.

[0265] As in the second embodiment of the clamping member 70, Figure 22As shown, the clamping member 70 includes a first clamping half-ring 73 and a second clamping half-ring 74 respectively provided on both sides of the connecting water pipe 10. The first clamping half-ring 73 has a first clamping groove, and the second clamping half-ring 74 has a second clamping groove. The first connecting convex portion 139 and the second connecting convex portion 611 are clamped in the first clamping groove and the second clamping groove. The first end of the first clamping half-ring 73 is detachably connected or rotatably connected to the first end of the second clamping half-ring 74, and the second end of the first clamping half-ring 73 is connected to the second end of the second clamping half-ring 74 through a clamping structure.

[0266] Specifically, as Figure 22 shown, one of the second ends of the first clamping half-ring 73 and the second clamping half-ring 74 is provided with an undercut 731, and the other is provided with a clamping hole, and the undercut 731 is clamped in the clamping hole.

[0267] Optionally, as Figure 22 shown, the first end of the first clamping half-ring 73 and the first end of the second clamping half-ring 74 can be detachably connected by a locking screw structure or a clamping structure, etc.

[0268] It should be noted that in other embodiments, other methods can be used to connect the first adapter section 61 to the connecting water pipe 10. For example, the inner surface of the first adapter section 61 can be provided with an internal thread, and the outer wall surface of the connecting water pipe 10 can be provided with an external thread, so that the first adapter section 61 is threadedly connected outside the connecting water pipe 10; and so on.

[0269] It should be particularly noted that the above solution for connecting the water pipe joint 210 on the inner tank 200 and the connecting water pipe 10 through the adapter 60 can also be applied to the connection of a single water inlet pipe or water outlet pipe in the prior art to the water pipe joint 210 on the inner tank 200, and there are no insurmountable obstacles, that is, the connecting water pipe 10 is made into a separate water inlet pipe or water outlet pipe. Correspondingly, the water passing port on the inner tank 200 is the water inlet on the tank or the water outlet on the tank.

[0270] It should be particularly noted that optionally, in some of the above embodiments, the inner tank outlet pipe 20 can include a metal outer pipe 22 and a plastic inner pipe 23 provided inside the metal outer pipe 22.

[0271] In another embodiment of the present invention, as Figure 20 and 21 shown, in this embodiment, the flow guiding member and the flow sensor 90 are not provided.

[0272] In yet another embodiment of the present invention, as Figure 22As shown, in this embodiment, the water pipe main body 82 includes three sub-pipe bodies. Each sub-pipe body is provided with a flow dividing channel 821, and two of the sub-pipe bodies are on the upper side while the remaining one is on the lower side. In this embodiment, the clamping member 70 adopts a solution including a first clamping semi-ring 73 and a second clamping semi-ring 74.

[0273] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A water pipe assembly for a water heater, characterized in that, The water pipe assembly includes: A connecting water pipe that extends into the water pipe joint of the inner tank; and A adapter, which is provided outside the connecting water pipe. The adapter includes a first adapter section that is sealingly connected to the connecting water pipe, and a second adapter section connected to one end of the first adapter section. The inner surface of the second adapter section is provided with an internal thread for threaded connection with the water pipe joint; A first connecting convex portion protrudes from the outer wall surface of the connecting water pipe, and a second connecting convex portion protrudes from the outer wall surface of the first adapter section. The first adapter section abuts against the first connecting convex portion, and the second connecting convex portion is connected to the first connecting convex portion so that the connecting water pipe is fixed to the first adapter section; The portion of the connecting water pipe above the first connecting convex portion is located inside the adapter and also inside the water pipe joint.

2. The water pipe assembly according to claim 1, characterized in that The inner diameter of the second adapter section is larger than the inner diameter of the first adapter section. The water pipe assembly further includes a first annular seal, which is used to be arranged between the end face of the first adapter section and the joint end face of the water pipe joint.

3. The water pipe assembly according to claim 1, characterized in that, The water pipe assembly further includes a second annular seal, which is arranged between the inner wall surface of the first adapter section and the outer wall surface of the connecting water pipe.

4. The water pipe assembly according to claim 3, characterized in that, An annular accommodation groove is provided on the outer wall surface of the connecting water pipe, and the second annular seal is arranged in the annular accommodation groove; and / or, A plurality of the second annular seals are distributed at intervals in the length direction of the connecting water pipe.

5. The water pipe assembly according to claim 1, characterized in that, The water pipe assembly further includes a clamping member that connects the first connecting convex portion and the second connecting convex portion; or, The water pipe assembly further includes a fastener that connects the first connecting convex portion and the second connecting convex portion.

6. The water pipe assembly according to claim 1, characterized in that The first connecting convex portion is annular, and / or, the first connecting convex portion is annular.

7. The water pipe assembly according to claim 1, characterized in that, The inner surface of the first adapter section is provided with an internal thread, and the outer wall surface of the connecting water pipe is provided with an external thread so that the first adapter section is threadedly connected outside the connecting water pipe.

8. The water pipe assembly according to claim 1, characterized in that, The adapter is made of a corrosion-resistant material; or, The surface of the adapter is provided with a corrosion-resistant layer.

9. The water pipe assembly according to any one of claims 1 to 8, characterized in that The connecting water pipe includes: A connecting base having a water outlet through hole; A water outlet inner pipe, one end of which is integrally arranged on the connecting base, and the water outlet inner pipe is communicated with the water outlet through hole; An inlet water outer pipe, one end of which is integrally arranged on the connecting base. The inlet water outer pipe is located outside the water outlet inner pipe. An inlet water channel is formed between the inlet water outer pipe, the water outlet inner pipe and the connecting base. A side inlet communicating with the inlet water channel is provided on the inlet water outer pipe; the first adapter section is sealingly connected to the inlet water outer pipe.

10. The water pipe assembly according to claim 9, characterized in that, The inlet water outer pipe includes an installation section connected to the connecting base and a water delivery section connected to the installation section. The wall thickness of the installation section is greater than the wall thickness of the water delivery section, and the first adapter section is sealingly connected outside the installation section.

11. The water pipe assembly according to claim 9, characterized in that, The outer diameter or equivalent outer diameter of the inlet water outer pipe is greater than or equal to 22 millimeters and less than or equal to 50 millimeters.

12. A water heater, characterized in that, The water heater includes: Inner container, the inner container has a water inlet; and The water pipe assembly according to any one of claims 1 to 11, the water pipe assembly is provided at the water inlet.

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