Water heater

Abstract

The utility model discloses a water heater, include: inner bag, the inner bag inside forms the cavity, the inner wall surface of cavity forms and is connected with the pipeline interface that the cavity communicates to have been seted up in the connecting area, connecting pipeline, connecting pipeline set up in the inner bag outside and have the plug -in end, the plug -in end with the pipeline interface is connected with the end of plug -in end does not protrude in the connecting area, protective layer, the protective layer is coated in the inner wall of cavity and covers connecting area, wherein the connecting area is configured as the arc wall of smooth transition with the inner wall surface of inner bag, the water heater that the utility model designs its protective layer to the protection effect of good inner bag.

Description

Technical Field

[0001] This utility model relates to the field of water heaters, and in particular to a water heater. Background Technology

[0002] In related technologies, the inner tank of an electric water heater is equipped with inlet and outlet water pipes. These pipes are typically inserted into the pipe interface of the inner tank and welded to it. An enamel layer is required on the inner wall of the tank to prevent water corrosion. However, due to the micropores in the enamel layer, the inner wall still comes into contact with water, resulting in poor corrosion protection from the enamel layer.

[0003] In some existing technologies, an anti-corrosion layer can be installed on the inner wall of the tank. This anti-corrosion layer can be formed by rotational molding of polymer materials or by powder coating of non-polymer materials, which provides better protection against corrosion to the inner wall of the tank. However, since the water pipe joint is inserted into the inner tank, during the forming process of this anti-corrosion layer, the part where the water pipe joint connects to the inner wall of the tank will accumulate anti-corrosion material. This anti-corrosion layer may break down during the material cooling process, posing a risk of exposing the inner wall of the tank at this point, thus affecting the anti-corrosion effect of the layer. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide a water heater. The water heater designed according to this utility model has a protective layer that provides good protection for the inner tank.

[0005] The water heater according to this utility model includes: an inner tank, wherein a cavity is formed inside the inner tank, and a connecting area is formed on the inner wall surface of the cavity, wherein a pipe interface communicating with the cavity is provided in the connecting area; a connecting pipe, wherein the connecting pipe is disposed outside the inner tank and has a plug end, the plug end is connected to the pipe interface and the end of the plug end does not protrude from the connecting area; and a protective layer, wherein the protective layer is coated on the inner wall of the cavity and covers the connecting area; wherein the connecting area is constructed as an arc-shaped wall that smoothly transitions with the inner wall surface of the inner tank.

[0006] According to this utility model, the water heater is designed so that the end of the connector does not protrude from the connection area of ​​the inner tank, so that there are no sharp corners between the end face of the connector and the inner wall of the inner tank. This ensures that the protective layer is evenly coated during molding, avoids the accumulation of protective layer material at the corners, and thus avoids damage to the protective layer at the connection between the end face of the connector and the inner wall of the inner tank, thereby improving the protective effect of the protective layer on the inner tank.

[0007] According to some embodiments of the present invention, at least a portion of the end face of the plug-in end is adapted to fit against the outer wall surface of the inner liner.

[0008] According to some embodiments of the present invention, the plug-in end is plugged into the pipeline interface and is provided with a first positioning part, and the inner liner is provided with a second positioning part suitable for positioning and cooperating with the first positioning part.

[0009] According to some embodiments of the present invention, the connection area defines the inner wall of the pipeline interface with a dimension d1 in the thickness direction of the inner liner; the first positioning part is constructed as a positioning protrusion protruding from the end face of the plug-in end, and the protrusion dimension in the thickness direction of the inner liner is d2; the end face of the plug-in end is adapted to fit against the outer wall surface of the inner liner; the outer wall surface of the positioning protrusion is adapted to fit against the inner edge of the pipeline interface, satisfying: d2≤d1.

[0010] According to some embodiments of the present invention, the positioning protrusion and the connecting area are smoothly connected, forming an arc-shaped transition surface.

[0011] According to some embodiments of the present invention, at least a portion of the end face of the plug-in end is welded to the outer wall surface of the inner liner.

[0012] According to some embodiments of the present invention, the inner liner is cylindrical, the connecting pipe is disposed at the axial end of the inner liner, and the axial direction of the connecting pipe is parallel to the axial direction of the inner liner.

[0013] According to some embodiments of the present invention, the inner liner includes: a cylindrical body, wherein the cavity is formed inside the cylindrical body and one end of the cylindrical body is open in the axial direction to form an open end; and an end cap, wherein the end cap is disposed on the open end and forms the connecting area.

[0014] According to some embodiments of this utility model, the pipeline interface is constructed as a plurality of spaced-apart connections, and the connecting pipeline is constructed as a plurality of connections corresponding one-to-one with the pipeline interface; the protective layer is formed by rotational molding of a polymer material.

[0015] According to some embodiments of the present invention, the inner liner structure consists of at least two interconnected components.

[0016] In summary, the water heater of this utility model designs the connecting pipe so that the end of its plug does not protrude from the connection area of ​​the inner tank, so that there are no sharp corners between the end face of the plug and the inner wall of the inner tank. This ensures that the protective layer is evenly coated during molding, avoids the accumulation of protective layer material at the corners, and thus avoids damage to the protective layer at the connection between the end face of the plug and the inner wall of the inner tank, thereby improving the protective effect of the protective layer on the inner tank.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a water heater structure according to some embodiments of the present utility model.

[0019] Figure 2 This is a schematic diagram of the connection pipe and the connection area according to the first embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the connection pipe and the connection area according to the second embodiment of the present utility model.

[0021] Figure label: 1. Water heater; 10. Inner liner; 10a. Cavity; 101. Connection area; 10b. Pipe interface; 11. Cylinder; 12. End cap; 20. Connecting pipe; 21. Insertion end; 211. Positioning protrusion. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In related technologies, the inner tank of an electric water heater is equipped with inlet and outlet water pipes. These pipes are typically inserted into the pipe interface of the inner tank and welded to it. An enamel layer is required on the inner wall of the tank to prevent water corrosion. However, due to the micropores in the enamel layer, the inner wall still comes into contact with water, resulting in poor corrosion protection from the enamel layer.

[0028] In some existing technologies, an anti-corrosion layer can be installed on the inner wall of the tank. This anti-corrosion layer can be formed by rotational molding of polymer materials or by powder coating of non-polymer materials, which provides better protection against corrosion to the inner wall of the tank. However, since the water pipe joint is inserted into the inner tank, during the forming process of this anti-corrosion layer, the part where the water pipe joint connects to the inner wall of the tank will accumulate anti-corrosion material. This anti-corrosion layer may break down during the material cooling process, posing a risk of exposing the inner wall of the tank at this point, thus affecting the anti-corrosion effect of the layer.

[0029] The following is for reference. Figures 1-3 A water heater 1 according to an embodiment of the present utility model is described.

[0030] like Figure 1As shown, the water heater 1 according to this utility model includes: an inner tank 10, a connecting pipe 20, and a protective layer. A cavity 10a is formed inside the inner tank 10, and a connecting area 101 is formed on the inner wall surface of the cavity 10a. The connecting area 101 has a pipe interface 10b communicating with the cavity 10a. The connecting pipe 20 is disposed outside the inner tank 10 and has a plug end 21. The plug end 21 is connected to the pipe interface 10b, and the end of the plug end 21 does not protrude from the connecting area 101. The protective layer is coated on the inner wall of the cavity 10a and covers the connecting area 101. The connecting area 101 is constructed as an arc-shaped wall that smoothly transitions with the inner wall surface of the inner tank 10.

[0031] Specifically, the cavity 10a of the inner tank 10 is suitable for storing the medium. To isolate the inner tank 10 from the medium, a protective layer can be coated on the inner wall of the inner tank 10 to prevent the medium from directly contacting the inner wall of the inner tank 10 and to protect the inner tank 10 from corrosion. The connecting pipe 20 provided in the water heater 1 is used to connect the cavity 10a to the external structure. The inner tank 10 forms a connection area 101 suitable for connecting with the connecting pipe 20, and the end of the plug end 21 of the connecting pipe 20 does not protrude from the connection area 101.

[0032] The phrase "the end of the plug-in terminal 21 does not protrude from the connection area 101" means that the plug-in terminal 21 is inserted into the pipe interface 10b with its end flush with the inner wall of the inner liner 10, or the plug-in terminal 21 is inserted into the pipe interface 10b with its end recessed into the inner wall of the inner liner 10, or the end of the plug-in terminal 21 is in contact with the outer wall of the inner liner 10. The design can be tailored to the specific circumstances and is not limited here. The fact that the end of the plug-in terminal 21 does not protrude from the connection area 101 ensures that there are no sharp corners between the end face of the plug-in terminal 21 and the inner wall of the inner liner 10, guaranteeing uniform coating during the formation of the protective layer and preventing the accumulation of protective layer material at the corners. This avoids damage to the protective layer at the connection between the end face of the plug-in terminal 21 and the inner wall of the inner liner 10, thus improving the protective effect of the protective layer on the inner liner 10.

[0033] According to this utility model, the water heater 1 has a design in which the end of the connecting pipe 20, the plug end 21, does not protrude from the connection area 101 of the inner tank 10, so that there is no sharp corner between the end face of the plug end 21 and the inner wall of the inner tank 10, ensuring that the protective layer is evenly coated during molding, avoiding the accumulation of protective layer material at the corner, thereby avoiding damage to the protective layer at the connection between the end face of the plug end 21 and the inner wall of the inner tank 10, and improving the protective effect of the protective layer on the inner tank 10.

[0034] Figure 1 This is a schematic diagram of the structure of water heater 1 according to an embodiment of the present utility model. Figure 2 and Figure 3 All Figure 1 Schematic diagram of the mating point between the connecting pipe 20 and the connecting area 101. Figure 2 According to the first embodiment of this utility model, Figure 3According to the second embodiment of this utility model, in both embodiments, a pulse fatigue test was conducted with a pressure of 1.0 MPa (10 kg) (the operating environment of water heater 1 × 1.2 safety factor), a pressure increase of 1.9 s, and a pressure decrease of 0.9 s. After 250,000 cycles, there was still no cracking or leakage.

[0035] According to some embodiments of this utility model, such as Figures 2-3 As shown, at least a portion of the end face of the plug-in end 21 is adapted to conform to the outer wall surface of the inner liner 10. Here, the end face of the plug-in end 21 is correspondingly disposed on the portion of the outer wall surface of the inner liner 10 that corresponds to the connection area 101, and the end face of the plug-in end 21 can be fully or partially conformed to that portion of the outer wall surface of the inner liner 10, so as to facilitate welding connection between the end face of the plug-in end 21 and that portion of the outer wall surface of the inner liner 10. Wherein, the end face of the plug-in end 21 being fully conformed to that portion of the outer wall surface of the inner liner 10 can mean, for example... Figure 2 As shown, the end face of the plug-in end 21 only contacts this part of the outer wall surface of the inner liner 10. The fact that the end face of the plug-in end 21 can partially fit against this part of the outer wall surface of the inner liner 10 means, for example... Figure 3 As shown, a portion of the plug end 21 is inserted into the pipe interface 10b, and the other portion of the plug end 21 contacts the outer wall surface of the inner liner 10 where the pipe interface 10b is formed.

[0036] According to some embodiments of this utility model, such as Figures 2-3 As shown, the plug-in end 21 is plugged into the pipe interface 10b and is provided with a first positioning part, while the inner liner 10 is provided with a second positioning part suitable for positioning and engaging with the first positioning part. Specifically, during the process of assembling the plug-in end 21 of the connecting pipe 20 with the pipe interface 10b of the inner liner 10, in order to ensure that the relative positions of the connecting pipe 20 and the inner liner 10 remain unchanged, a first positioning part and a second positioning part can be designed on the connecting pipe 20 and the inner liner 10 respectively. Furthermore, a first positioning part is provided on the plug-in end 21, and a second positioning part is provided on the inner liner 10. The first positioning part and the second positioning part are positioned and engaged to ensure the smooth progress of the welding process.

[0037] According to some embodiments of this utility model, such as Figure 3 As shown, the connection area 101 defines the inner wall of the pipe interface 10b with a dimension d1 in the thickness direction of the inner liner 10; the first positioning part is constructed as a positioning protrusion 211 protruding from the end face of the plug end 21, and the protrusion dimension in the thickness direction of the inner liner 10 is d2. The end face of the plug end 21 is adapted to fit against the outer wall surface of the inner liner 10, and the outer wall surface of the positioning protrusion 211 is adapted to fit against the inner edge of the pipe interface 10b, satisfying: d2≤d1.

[0038] Specifically, the positioning protrusion 211 extends into the pipe interface 10b. At this time, the outer wall surface of the positioning protrusion 211 is in contact with the inner edge of the pipe interface 10b, and the end face of the insertion end 21 is in contact with the outer wall surface of the inner liner 10. Furthermore, the inner liner 10 defines the inner wall of the pipe interface 10b in the thickness direction, and the dimension d1 of the inner wall of the pipe interface 10b in the thickness direction of the inner liner 10 and the protrusion dimension d2 of the positioning protrusion 211 in the thickness direction of the inner liner 10 satisfy: d2≤d1, so that the positioning protrusion 211 does not protrude beyond the inner liner 10 defining the pipe interface 10b. The positioning protrusion 211 can be flush with the inner wall of the inner liner 10 defining the pipe interface 10b, or it can be recessed into the inner wall of the inner liner 10 defining the pipe interface 10b. This ensures that there are no sharp corners between the end face of the plug end 21 and the inner wall of the inner liner 10, guaranteeing uniform coating during the forming of the protective layer and preventing the protective layer material from accumulating at the corners. This prevents damage to the protective layer at the connection between the end face of the plug end 21 and the inner wall of the inner liner 10, thereby improving the protective effect of the protective layer on the inner liner 10.

[0039] According to some embodiments of this utility model, the positioning protrusion 211 smoothly transitions with the connecting area 101, forming an arc-shaped transition surface. Here, the inner liner 10 defines the inner wall of the pipe interface 10b, i.e., the connecting area 101. The positioning protrusion 211 does not protrude from the inner wall of the inner liner 10 defining the pipe interface 10b, that is, the positioning protrusion 211 does not protrude from the connecting area 101. Furthermore, the smooth transition between the positioning protrusion 211 and the connecting area 101 ensures that there are no sharp corners at the junction of the end face of the plug-in end 21 and the connecting area 101, and also forms an arc-shaped transition surface. This ensures uniform coating during the molding of the protective layer, avoids the accumulation of protective layer material at the corners, thereby preventing damage to the protective layer at the junction of the end face of the plug-in end 21 and the connecting area 101, and improving the protective effect of the protective layer on the inner liner 10.

[0040] According to some embodiments of the present invention, at least a portion of the end face of the plug end 21 is welded to the outer wall surface of the inner liner 10. That is, the connecting pipe 20 can be welded to the inner liner 10. In the process of assembling the plug end 21 of the connecting pipe 20 with the pipe interface 10b of the inner liner 10, in order to ensure that the relative position of the connecting pipe 20 and the inner liner 10 remains unchanged, a positioning part can be designed on the connecting pipe 20 and the inner liner 10, or an additional positioning structure can be used to restrict the relative position of the connecting pipe 20 and the inner liner 10 to ensure the smooth progress of the welding process.

[0041] According to some embodiments of this utility model, such as Figure 1As shown, the inner tank 10 has a cylindrical structure, and the connecting pipe 20 is located at the axial end of the inner tank 10, with the axial direction of the connecting pipe 20 parallel to that of the inner tank 10. Specifically, the connecting pipe 20 is located at the axial end of the inner tank 10, which makes the overall radial dimension of the water heater 1 small, and the connecting pipe 20 can be led out from the inner tank 10 in the axial direction, which also facilitates the pipe arrangement of the water heater 1.

[0042] According to some embodiments of this utility model, such as Figure 1 As shown, the inner liner 10 includes a cylindrical body 11 and an end cap 12. The cylindrical body 11 has a cavity 10a inside, and one end of the cylindrical body 11 is open in the axial direction to form an open end. The end cap 12 is placed on the open end and forms a connection area 101. Specifically, the pipe interface 10b is opened on the end cap 12. The connecting pipe 20 can be connected to the end cap 12 first, and then the end cap 12 can be connected to the cylindrical body 11. Alternatively, the end cap 12 can be connected to the cylindrical body 11 first, and then the connecting pipe 20 can be connected to the end cap 12. The choice can be made according to actual needs and is not limited here.

[0043] According to some embodiments of this utility model, the protective layer is made of polymer material through rotational molding. The protective layer made of polymer material through rotational molding has a better anti-corrosion effect on the inner wall of the inner liner 10. Furthermore, since there are no sharp corners between the end face of the plug end 21 of the connecting pipe 20 and the inner wall of the inner liner 10, the protective layer made of polymer material through rotational molding can be uniformly coated during molding, resulting in a better protective effect on the inner liner 10.

[0044] According to some embodiments of the present invention, the pipe interface 10b is configured as a plurality of spaced-apart pipes, and the connecting pipes 20 are configured as a plurality of pipes corresponding one-to-one with the pipe interface 10b. Each connecting pipe 20 can play a different role. For example, one of the plurality of connecting pipes 20 can be a water inlet pipe, one of the plurality of connecting pipes 20 can be a water outlet pipe, or other connecting pipes 20 connected to the inner tank 10 can also be connected to the inner tank 10 using the above connection method.

[0045] According to some embodiments of this utility model, the inner tank 10 is constructed as at least two interconnected. Here, the water heater 1 can be a single inner tank 10 or a multi-inner tank 10 structure. When the water heater 1 is a multi-inner tank 10 structure, the inner tank 10 is constructed as at least two interconnected, and at least two inner tanks 10 can be designed to be connected. In this case, at least one of the multiple inner tanks 10 is designed with a connecting pipe 20. At least two inner tanks 10 can also be connected but not interconnected, in which case each inner tank 10 can be designed with a connecting pipe 20.

[0046] In summary, the water heater 1 of this utility model designs the connecting pipe 20 such that the end of its plug 21 does not protrude from the connection area 101 of the inner tank 10, so that there are no sharp corners between the end face of the plug 21 and the inner wall of the inner tank 10, ensuring that the protective layer is evenly coated during molding, avoiding the accumulation of protective layer material at the corners, thereby preventing damage to the protective layer at the connection between the end face of the plug 21 and the inner wall of the inner tank 10, and improving the protective effect of the protective layer on the inner tank 10.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] Although embodiments of the present invention have been shown and described above, variations, modifications, substitutions and alterations can be made to the above embodiments.

Claims

1. A water heater, characterized in that, include: The inner liner has a cavity inside, and the inner wall of the cavity has a connection area, which is provided with a pipe interface communicating with the cavity. A connecting pipe is provided outside the inner liner and has a plug end, the plug end is connected to the pipe interface and the end of the plug end does not protrude from the connecting area; A protective layer is applied to the inner wall of the cavity and covers the connection area; in The connecting area is constructed as an arc-shaped wall that smoothly transitions with the inner wall surface of the inner liner.

2. The water heater according to claim 1, characterized in that, At least a portion of the end face of the plug is adapted to fit against the outer wall surface of the inner liner.

3. The water heater according to claim 1 or 2, characterized in that, The plug-in end is plugged into the pipeline interface and is provided with a first positioning part, and the inner liner is provided with a second positioning part suitable for positioning and cooperating with the first positioning part.

4. The water heater according to claim 3, characterized in that, The connection area defines the dimension d1 of the inner wall of the pipeline interface in the thickness direction of the inner liner; The first positioning part is constructed as a positioning protrusion protruding from the end face of the plug-in end, and the protrusion dimension in the thickness direction of the inner liner is d2. The end face of the plug-in end is adapted to fit against the outer wall surface of the inner liner, and the outer wall surface of the positioning protrusion is adapted to fit against the inner edge of the pipeline interface, satisfying: d2≤d1.

5. The water heater according to claim 4, characterized in that, The positioning protrusion smoothly transitions into the area where it meets the connecting area, forming an arc-shaped transition surface.

6. The water heater according to claim 1 or 2, characterized in that, At least a portion of the end face of the plug is welded to the outer wall surface of the inner liner.

7. The water heater according to claim 1, characterized in that, The inner liner is cylindrical, and the connecting pipe is located at the axial end of the inner liner, with the axial direction of the connecting pipe parallel to the axial direction of the inner liner.

8. The water heater according to claim 1, characterized in that, The inner liner includes: A cylindrical body, wherein the cavity is formed inside the cylindrical body and one axial end of the cylindrical body is open to form an open end; An end cap is provided on the open end and forms the connection area.

9. The water heater according to claim 1, characterized in that, The pipeline interface is constructed as a plurality of spaced-apart connections, and the connecting pipeline is constructed as a plurality of connections corresponding one-to-one with the pipeline interface; The protective layer is formed by rotational molding of a polymer material.

10. The water heater according to claim 1, characterized in that, The inner liner structure consists of at least two interconnected components.

Images