Water inlet and outlet structure of water heater and water heater

Abstract

A water pipe is arranged on an inner container and communicated with a water storage cavity of the inner container, one end of the water pipe extends out of the inner container, the water pipe is used for supplying water into the water storage cavity or allowing water in the water storage cavity to flow out, a safety valve comprises a main body part and a flange part, and an included angle is formed between the axial direction of the main body part and the axial direction of the flange part; a first water flowing cavity extending in the axial direction of the main body part is formed in the main body part, a second water flowing cavity extending in the axial direction of the flange part is formed in the flange part, the first water flowing cavity is communicated with the second water flowing cavity, and the connecting part is connected between the extending end of the water pipe and the flange part and used for communicating the water pipe with the second water flowing cavity. By means of the safety valve with the turning function, elbow connecting pieces are omitted, water leakage points are reduced, after-sale spare parts are reduced, the cost is reduced, the height size of the whole machine can be reduced, and hidden installation of the water inlet and outlet pipe is better facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of water heaters, and in particular to a water inlet and outlet structure of a water heater and a water heater. Background Art

[0002] The electric water heater includes a shell, an inner tank, a water inlet pipe, a water outlet pipe and other components. The electric water heater is fixed to the wall or ceiling of a room (such as a bathroom) through a bracket. The water inlet pipe and the water outlet pipe are arranged at the bottom of the electric water heater.

[0003] The water inlet and outlet pipes of existing horizontal electric water heaters generally extend vertically downward in a radial direction. When installing the water heater, an elbow is installed at the lower end of the water inlet and outlet pipes to change the direction of water flow, and then a safety valve is installed. Then, a hidden cover is installed to cover and hide the pipes, installation valves and other components. The existing structure has the following disadvantages: 1. Every additional installation of a connecting elbow will increase the workload of after-sales service; 2. Every additional connection elbow will increase a leakage risk point; 3. The existence of elbow connection points, such as threaded connections, these serially connected pipe joints, valve bodies, etc. increase the height and width (towards the wall) of the entire machine. When hidden with a hidden cover, the size is large, which occupies a large space and is not beautiful; 4. Adding elbows means increasing costs.

[0004] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In response to the problems pointed out in the background technology, the present invention proposes a water inlet and outlet structure of a water heater and a water heater. By having a safety valve with a 90° turn, the use of elbow connectors is eliminated, leakage points are reduced, after-sales spare parts are reduced, costs are reduced, and it helps to reduce the height of the entire machine, which is more conducive to the hidden installation of the inlet and outlet pipes.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: The present invention provides a water inlet and outlet structure of a water heater, comprising: An inner tank, wherein a water storage cavity is formed; a water pipe, which is arranged on the inner tank and communicated with the water storage cavity, one end of the water pipe extends from the inner tank, and the water pipe is used to supply water into the water storage cavity or to allow water in the water storage cavity to flow out; A safety valve, comprising a main body and a flange, wherein an angle is formed between the axial direction of the main body and the axial direction of the flange, wherein a first water flow cavity extending along the axial direction thereof is provided in the main body, and a second water flow cavity extending along the axial direction thereof is provided in the flange, wherein the first water flow cavity is connected to the second water flow cavity; A connecting portion is connected between the extended end of the water pipe and the flange portion, and is used to connect the water pipe with the second water flow cavity.

[0007] In some embodiments, the connecting portion includes a connecting body portion, the connecting body portion is provided with an inserting portion on one end facing the flange portion, the inserting portion is inserted into the second water flow cavity, and the inserting portion is sealed and connected to the inner peripheral wall of the second water flow cavity; The connecting portion is provided with a through mounting hole along its axial direction, and the protruding end of the water pipe is arranged in the mounting hole.

[0008] In some embodiments, an outer peripheral wall of the insertion portion is provided with a mounting groove extending along the circumference thereof, and a sealing member is arranged in the mounting groove to seal between the insertion portion and the inner peripheral wall of the second water flow cavity.

[0009] In some embodiments, the outer diameter of the insertion portion is smaller than the outer diameter of the connecting body portion, a step surface is formed between the insertion portion and the connecting body portion, and the step surface abuts against the flange portion.

[0010] In some embodiments, the connecting body portion is provided with a connecting extension portion on one end away from the flange portion, and the connecting extension portion extends toward the outer peripheral side of the connecting body portion; The flange portion comprises a flange main body portion and a flange extension portion, wherein the flange extension portion extends toward the outer circumference of the flange main body portion, and the second water flow cavity is disposed in the flange main body portion; The connecting extension portion and the flange extension portion are connected via a connecting piece.

[0011] In some embodiments, the connecting extension portion is provided with a plurality of first mounting holes arranged at intervals along its circumference, and the flange extension portion is provided with a plurality of second mounting holes arranged at intervals along its circumference, the second mounting holes are long holes, and the first mounting holes and the second mounting holes are connected by a connecting piece.

[0012] In some embodiments, the mounting hole includes a first mounting hole section and a second mounting hole section, and the inner diameter of the first mounting hole section is greater than the inner diameter of the second mounting hole section; The inner tank is provided with a through hole for the water pipe to pass through, a base is arranged at the through hole, the protruding end of the water pipe is passed through the base, the base is arranged in the first section of the installation hole, one end of the water pipe extends from the base and is inserted in the second section of the installation hole.

[0013] In some embodiments, the angle between the axial direction of the main body and the axial direction of the flange is 90°, and the second water flow cavity is coaxially arranged with the water pipe.

[0014] In some embodiments, one end of the water pipe extends from the bottom of the inner pot, the connection position between the connecting portion and the water pipe, and the connection position between the connecting portion and the flange portion are both located below the inner pot, and the main body extends in a direction parallel to the transverse cross-section of the inner pot.

[0015] The present invention further provides a water heater, comprising a shell and the water inlet and outlet structure as described above, wherein a hidden cover is provided at the bottom of the shell, and the hidden cover shields the water inlet and outlet structure.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: In the water heater disclosed in the present application, the safety valve has an elbow structure, which directly connects the water pipe to the installation valve through the connecting part, eliminating the elbow connector in the prior art, thereby reducing the leakage points on the water inlet and outlet pipes, reducing the number of water connectors, and reducing costs.

[0017] During assembly, one end of the water pipe extends from the inner tank and the outer shell, the connecting part is connected to the water pipe, and then the flange part of the safety valve is connected to the connecting part to achieve water communication. Since the use of elbow connectors is reduced, the assembly efficiency is greatly improved.

[0018] Since the elbow connector is eliminated, the distance between the horizontally extending main body and the bottom of the water heater is greatly reduced. The distance between the main body and the bottom of the water heater only needs to accommodate the connecting part and the flange part, thereby reducing the overall height of the water heater.

[0019] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 is a schematic structural diagram of a water heater according to an embodiment; Figure 2 is a side view of a water heater according to an embodiment; Figure 3is a structural schematic diagram of a water inlet and outlet structure according to an embodiment; Figure 4 is a longitudinal cross-sectional view of the water inlet and outlet structure according to an embodiment; Figure 5 for Figure 4 Enlarged view of part A in the middle; Figure 6 is a schematic structural diagram of a water pipe, a connecting portion, and a safety valve according to an embodiment; Figure 7 is a schematic structural diagram of a safety valve according to an embodiment; Figure 8 is a top view of an installed valve according to an embodiment; Fig. 9 for Figure 8 Middle BB section view; Fig.10 is a schematic structural diagram of a connecting portion according to an embodiment; Fig.11 is a front view of a connecting portion according to an embodiment; Fig.12 for Fig.11 Middle CC section view; Reference numerals: 100. Water pipes; 200, connecting portion; 210, connecting main body portion; 220, inserting portion; 221, mounting groove; 230, connecting extension portion; 231, first mounting hole; 240, mounting hole; 241, first mounting hole section; 242, second mounting hole section; 250, stepped surface; 300, safety valve; 310, main body; 311, first water flow cavity; 320, flange; 321, flange main body; 322, flange extension; 323, second water flow cavity; 324, second mounting hole; 400, inner tank; 410, water storage chamber; 420, base; 500, housing; 600, electric wall cover; 700, hidden hood; 800, seals; 900. Connectors. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0028] This embodiment discloses a water heater, specifically an electric water heater, comprising Figure 1 and Figure 2 The water heater is fixed to the ceiling or wall of a room (such as a bathroom) through a bracket or other structure.

[0029] The water heater includes a shell 500, the outer contour of which is a cylindrical structure, and the longitudinal cross section is circular or elliptical, etc. An inner tank 400 is arranged in the shell 500, and the inner tank 400 forms a water storage chamber 410. A heating device is arranged in the water storage chamber 410 for heating the water in the water storage chamber 410.

[0030] The water heater is generally installed near a wall, with the rear side of the housing 500 close to the wall and the front side of the housing 500 away from the wall. An anti-electricity wall cover 600 is provided at the lower position of the front side of the housing 500, and is used to fix a display panel, an operation panel, etc. The anti-electricity wall cover 600 is provided with openings for the water inlet pipe and the water outlet pipe to run.

[0031] A hidden cover 700 is arranged outside the anti-electrical wall cover 600. The hidden cover 700 is located below the outer shell 500. The hidden cover 700 is used to hide water inlet and outlet components such as a water inlet pipe and a water outlet pipe.

[0032] Water heater inlet and outlet water structure reference Figures 3 to 6 , an external water source is supplied into the water storage chamber 410 of the inner tank 400 through the water inlet and outlet structure, and the water in the water storage chamber 410 flows out through the water inlet and outlet structure for use by the user.

[0033] The water inlet and outlet structure includes a water pipe 100, a safety valve 300, a connecting part 200, etc. The structure of the safety valve 300 is shown in FIG. Figures 7 to 9 The structure of the connecting portion 200 is shown in FIG. Figures 10 to 12 .

[0034] The water pipe 100 is disposed on the inner tank 400 and communicates with the water storage chamber 410. One end of the water pipe 100 extends from the inner tank 400 to connect with the external connection part 200 and the safety valve 300. The water pipe 100 is used to supply water to the water storage chamber 410 or to allow the water in the water storage chamber 410 to flow out.

[0035] The water pipe 100 includes a water inlet pipe and a water outlet pipe. The water inlet pipe is used to supply water to the water storage chamber 410. External water source flows into the water storage chamber 410 through the water inlet pipe. The water outlet pipe is used to supply water in the water storage chamber 410 to flow out.

[0036] A connection portion 200 and a safety valve 300 are respectively provided on the water inlet pipe and the water outlet pipe. Figures 1 to 4 The structure shown only shows that the connection portion 200 and the safety valve 300 are arranged on the water inlet pipe.

[0037] Reference Figures 5 to 9 The safety valve 300 includes a main body 310 and a flange 320, and the main body 310 and the flange 320 are an integral structure. There is an angle between the axial direction of the main body 310 and the axial direction of the flange 320, that is, the axial extension direction of the main body 310 is different from the axial extension direction of the flange 320.

[0038] A first water flow cavity 311 extending along the axial direction thereof is disposed in the main body 310 , and a second water flow cavity 323 extending along the axial direction thereof is disposed in the flange 320 . The first water flow cavity 311 is communicated with the second water flow cavity 323 .

[0039] Reference Figure 5 and Figure 6 The connecting portion 200 is connected between the protruding end of the water pipe 100 and the flange portion 320 , and is used to connect the water pipe 100 with the second water flow chamber 323 .

[0040] When water enters the water inlet pipe, the external water source flows into the water storage chamber 410 of the inner tank 400 through the first water flow chamber 311 , the second water flow chamber 323 , and the water pipe 100 .

[0041] When water flows out of the water outlet pipe, the water in the water storage chamber 410 flows out through the water pipe 100, the second water flow chamber 323, and the first water flow chamber.

[0042] The special structural design of the safety valve 300 is equivalent to the safety valve 300 having its own elbow structure. The water pipe 100 is directly connected to the safety valve 300 through the connecting part 200, eliminating the elbow connector in the prior art, thereby reducing the leakage points on the water inlet and outlet pipes, reducing the number of water connectors, and reducing costs.

[0043] During assembly, one end of the water pipe 100 extends from the inner tank 400 and the outer shell 500, the connecting part 200 is connected to the water pipe 100, and then the flange part 320 of the safety valve 300 is connected to the connecting part 200, so that the water circuit can be connected. Since the use of elbow connectors is reduced, the assembly efficiency is greatly improved.

[0044] In some embodiments, reference Figure 5 and Figure 7 The angle between the axial direction of the main body 310 and the axial direction of the flange 320 is 90°, the first water flow chamber 311 and the second water flow chamber 323 are perpendicular to each other, and the angle between the two is 90°. In this way, the installation valve has the function of a 90° elbow connector through its own structural improvement.

[0045] The second water flow chamber 323 is coaxially arranged with the water pipe 100 , and the water pipe 100 is connected with the second water flow chamber 323 , so that the water pipe 100 , the second water flow chamber 323 , and the first water flow chamber 311 are connected, and the water path is connected.

[0046] After the safety valve 300, the connecting part 200 and the water pipe 100 are connected, since the main body 310 and the flange 320 are perpendicular to each other, the water pipe 100, the connecting part 200 and the flange 320 are on the same axis, the connecting part 200 and the flange 320 are both located below the water heater, and the main body 310 extends horizontally toward the rear of the water heater (specifically toward the wall).

[0047] from Figure 5 It can be seen that the setting of the safety valve 300 with a 90° elbow structure has eliminated the elbow connector, which greatly reduces the distance between the horizontally extending main body 310 and the bottom of the water heater. The distance between the main body 310 and the bottom of the water heater only needs to accommodate the connection part 200 and the flange part 320, thus reducing the overall height of the water heater. Figure 2 , the size of the hidden cover 700 can also be greatly reduced.

[0048] In some embodiments, reference Figure 4 and Figure 5 The lower end of the water pipe 100 extends from the bottom of the inner tank 400, the connection position between the connecting portion 200 and the water pipe 100, and the connection position between the connecting portion 200 and the flange portion 320 are both located below the inner tank 400, and the main body 310 extends in a direction parallel to the transverse cross-section of the inner tank 400, specifically, the main body 310 extends horizontally toward the rear of the water heater (specifically toward the wall), thereby minimizing the height of the water heater in the vertical direction and reducing the height of the entire machine.

[0049] In some embodiments, reference Figures 10 to 12 The connecting part 200 includes a connecting body part 210, and the connecting body part 210 is provided with an inserting part 220 at one end facing the flange part 320, and then combined with Figure 5 The insertion portion 220 is inserted into the second water flow cavity 323 , and the insertion portion 220 and the inner peripheral wall of the second water flow cavity 323 are sealed and connected.

[0050] The connecting portion 200 is provided with a through mounting hole 240 along its axial direction, and the protruding end of the water pipe 100 is disposed in the mounting hole 240 .

[0051] During installation, the protruding end of the water pipe 100 extending from the inner tank 400 is inserted into the installation hole 240 to realize the connection between the connecting part 200 and the water pipe 100, and the insertion part 220 is inserted into the second water flow cavity 323 to realize the connection between the connecting part 200 and the flange part 320. The water pipe 100, the installation hole 240 in the connecting part 200, the second water flow cavity 323, and the first water flow cavity 311 form a connecting water path.

[0052] The extended end of the water pipe 100 is sealed with the mounting hole 240 of the connecting portion 200 , and the inserting portion 220 is also sealed with the inner peripheral wall of the second water flow cavity 323 , thereby improving the sealing performance of the water channel connection point.

[0053] In some embodiments, a mounting groove 221 extending along the circumference of the insertion portion 220 is provided on the outer circumferential wall thereof, and a sealing member 800 , such as a sealing ring, is disposed in the mounting groove 221 to seal between the insertion portion 220 and the inner circumferential wall of the second water flow chamber 323 .

[0054] The sealing between the inserting portion 220 and the second water flow chamber 323 is achieved by a circumferential sealing ring. Compared with the existing threaded connection, the waterproof sealing effect is better and the installation is convenient.

[0055] In some embodiments, reference Fig.12 The outer diameter of the insertion portion 220 is smaller than the outer diameter of the connecting body portion 210, and a step surface 250 is formed between the insertion portion 220 and the connecting body portion 210. The step surface 250 abuts against the flange portion 320, further improving the connection reliability between the connecting portion 200 and the safety valve 300.

[0056] In some embodiments, reference Figures 10 to 12 The connecting body portion 210 is provided with a connecting extension portion 230 at one end away from the flange portion 320 , and the connecting extension portion 230 extends toward the outer peripheral side of the connecting body portion 210 .

[0057] Reference Figures 7 to 9 The flange portion 320 includes a flange main body portion 321 and a flange extension portion 322 . The flange extension portion 322 extends toward the outer circumference of the flange main body portion 321 . A second water flow cavity 323 is disposed in the flange main body portion 321 .

[0058] Reference Figure 6 The connecting extension portion 230 and the flange extension portion 322 are connected via a connecting member 900 (such as a bolt).

[0059] The connection and fastening between the connecting extension part 230 and the flange extension part 322 through the connecting piece 900 helps to improve the connection reliability between the connecting part 200 and the safety valve 300, avoid the two from detaching, and make the stepped surface 250 close to the top surface of the flange extension part 322, further improving the waterproof sealing.

[0060] In some embodiments, the connecting extension portion 230 is provided with a plurality of first mounting holes 231 arranged at intervals along its circumference, and the flange extension portion 322 is provided with a plurality of second mounting holes 324 arranged at intervals along its circumference. The second mounting holes 324 are long holes, and the first mounting holes 231 and the second mounting holes 324 are connected by a connecting member 900.

[0061] The second mounting hole 324 is designed as a long hole. After the safety valve 300 is connected to the connecting part 200, no matter the relative rotation position between the safety valve 300 and the connecting part 200, a first mounting hole 231 directly opposite to the second mounting hole 324 can be found so that the two can be fastened by a connecting member 900 such as bolts, which is convenient for installation.

[0062] In some embodiments, reference Fig.12 The mounting hole 240 includes a first mounting hole section 241 and a second mounting hole section 242 , and the inner diameter of the first mounting hole section 241 is greater than the inner diameter of the second mounting hole section 242 .

[0063] Reference Figure 5 The inner tank 400 is provided with a through hole through which the water supply pipe 100 passes, and a base 420 is provided at the through hole. The protruding end of the water pipe 100 is passed through the base 420, and the base 420 is fixed in the first section 241 of the mounting hole by a threaded connection. One end of the water pipe 100 extends from the base 420 and is inserted into the second section 242 of the mounting hole, thereby realizing the connection between the protruding end of the water pipe 100 and the connecting part 200.

[0064] The extended end of the water pipe 100 has a limiting effect at the base 420 and the second section 242 of the installation hole, thereby improving the installation stability of the water pipe 100 and the waterproof sealing performance there.

[0065] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0066] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A water inlet and outlet structure of a water heater, comprising: An inner tank, wherein a water storage cavity is formed; a water pipe, which is arranged on the inner tank and communicated with the water storage cavity, one end of the water pipe extends from the inner tank, and the water pipe is used to supply water into the water storage cavity or to allow water in the water storage cavity to flow out; It is characterized in that the water inlet and outlet structure also includes: A safety valve, comprising a main body and a flange, wherein an angle is formed between the axial direction of the main body and the axial direction of the flange, wherein a first water flow cavity extending along the axial direction thereof is provided in the main body, and a second water flow cavity extending along the axial direction thereof is provided in the flange, wherein the first water flow cavity is connected to the second water flow cavity; A connecting portion is connected between the extended end of the water pipe and the flange portion, and is used to connect the water pipe with the second water flow cavity.

2. The water inlet and outlet structure of the water heater according to claim 1, characterized in that: The connecting part comprises a connecting body part, and an inserting part is provided on one end of the connecting body part facing the flange part, and the inserting part is inserted into the second water flow cavity, and the inserting part is sealed and connected to the inner peripheral wall of the second water flow cavity; The connecting portion is provided with a through mounting hole along its axial direction, and the protruding end of the water pipe is arranged in the mounting hole.

3. The water inlet and outlet structure of the water heater according to claim 2, characterized in that: An installation groove extending along the circumferential direction is provided on the outer peripheral wall of the inserting portion, and a sealing member is arranged in the installation groove to seal between the inserting portion and the inner peripheral wall of the second water flow cavity.

4. The water inlet and outlet structure of the water heater according to claim 2, characterized in that: The outer diameter of the inserting portion is smaller than the outer diameter of the connecting body portion. A step surface is formed between the inserting portion and the connecting body portion, and the step surface abuts against the flange portion.

5. The water inlet and outlet structure of the water heater according to claim 2, characterized in that: The connecting main body is provided with a connecting extension portion on one end away from the flange portion, and the connecting extension portion extends toward the outer peripheral side of the connecting main body; The flange portion comprises a flange main body portion and a flange extension portion, wherein the flange extension portion extends toward the outer circumference of the flange main body portion, and the second water flow cavity is disposed in the flange main body portion; The connecting extension portion and the flange extension portion are connected via a connecting piece.

6. The water inlet and outlet structure of the water heater according to claim 5, characterized in that: The connecting extension portion is provided with a plurality of first mounting holes arranged at intervals along its circumference, and the flange extension portion is provided with a plurality of second mounting holes arranged at intervals along its circumference, the second mounting holes are elongated holes, and the first mounting holes are connected to the second mounting holes by a connecting piece.

7. The water inlet and outlet structure of the water heater according to claim 2, characterized in that: The mounting hole comprises a first mounting hole section and a second mounting hole section, and the inner diameter of the first mounting hole section is greater than the inner diameter of the second mounting hole section; The inner tank is provided with a through hole for the water pipe to pass through, a base is arranged at the through hole, the protruding end of the water pipe is passed through the base, the base is arranged in the first section of the installation hole, one end of the water pipe extends from the base and is inserted in the second section of the installation hole.

8. The water inlet and outlet structure of a water heater according to any one of claims 1 to 7, characterized in that: The angle between the axial direction of the main body and the axial direction of the flange is 90°, and the second water flow cavity is coaxially arranged with the water pipe.

9. The water inlet and outlet structure of a water heater according to any one of claims 1 to 7, characterized in that: One end of the water pipe extends from the bottom of the inner pot, the connection position between the connecting part and the water pipe, and the connection position between the connecting part and the flange part are both located below the inner pot, and the main body extends in a direction parallel to the transverse cross-section of the inner pot.

10. A water heater, comprising a housing, characterized in that: It also includes a water inlet and outlet structure as described in any one of claims 1 to 9, and a hidden cover is provided at the bottom of the shell, and the hidden cover shields the water inlet and outlet structure.

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