Water heater

Abstract

The embodiment of the application provides a water heater, and relates to the technical field of water heaters. The water heater comprises a shell, a liner located in the shell and having a cavity between the liner and the inner wall of the shell, a water pipe located between the liner and the shell, a first end of the water pipe being mounted to the liner, a second end of the water pipe being exposed outside the shell, a sealing member sleeved around the circumference of the water pipe and fixed relative to the water pipe, a first gap cavity being formed between the sealing member, the water pipe and the liner, a first flow guide channel being formed in the circumference of the sealing member, the first flow guide channel being located at one end of the sealing member adjacent to the liner and being communicated with the cavity and the first gap cavity, and a heat preservation filler being filled in the cavity and the first gap cavity through the first flow guide channel, the heat preservation filler forming a heat preservation structure after solidification, so that the heat preservation structure forms an integral structure, external impurities are prevented from entering the first gap cavity and corroding the liner, and the heat preservation performance of the heat preservation structure is ensured.

Description

Technical Field

[0001] This application relates to the field of water heater technology, and more particularly to a water heater. Background Technology

[0002] A water heater is a device used to heat and store hot water, typically consisting of an inner tank, an outer shell, and an insulation layer between them. The inner tank stores the hot water, while the insulation layer reduces heat loss and improves the water heater's energy efficiency. To achieve good insulation, polyurethane foam is usually filled between the inner tank and the outer shell as an insulation layer. Polyurethane foam has excellent insulation properties and can effectively reduce heat transfer.

[0003] A water heater consists of water pipes, an outer shell, and an inner tank. The water pipes pass through the outer shell and are inserted into the inner tank for water inlet and outlet connections. To prevent the foaming material from overflowing, a foaming material retainer is installed between the inner tank and the outer shell to block the flow of the foaming material and prevent it from overflowing from the gap between the water pipes and the outer shell.

[0004] However, there will be gaps between the foamed material retaining ring and the water pipe and inner liner. The foamed material cannot fill the gaps, and external impurities can easily enter through the gaps and corrode the inner liner. Utility Model Content

[0005] This application provides a water heater where there is a certain gap between the foamed material retaining ring, the water pipe, and the inner tank, which makes it easy for external impurities to enter through the gap and corrode the inner tank.

[0006] This application provides a water heater, including:

[0007] shell;

[0008] The inner liner is located inside the outer shell and has a cavity between it and the inner wall of the outer shell;

[0009] The water pipe is located between the inner liner and the outer shell. The first end of the water pipe is installed in the inner liner, and the second end of the water pipe is exposed on the outside of the outer shell.

[0010] A sealing element is fitted around the water pipe and fixed relative to the water pipe. A first gap cavity exists between the sealing element, the water pipe, and the inner liner. A first flow channel exists around the sealing element. The first flow channel is located at one end of the sealing element adjacent to the inner liner and connects the cavity and the first gap cavity.

[0011] The thermal insulation filler is filled into the cavity and then into the first void cavity through the first flow channel. After the thermal insulation filler solidifies, it forms a thermal insulation structure.

[0012] In one possible implementation, the number of first flow channels is multiple.

[0013] In one possible implementation, a plurality of first flow channels are spaced apart in the circumferential direction of the seal, and the spacing between adjacent first flow channels is equal.

[0014] In one possible implementation, the seal is press-fitted against the circumferential outer wall of the water pipe at least on the circumferential inner wall near one end of the inner liner, or...

[0015] There is a second cavity between the inner circumferential wall of the seal and the outer circumferential wall of the water pipe. The second cavity is connected to the first cavity, and the insulation filler is also filled into the second cavity through the first cavity.

[0016] In one possible implementation, the seal has a first notch on an end face adjacent to one end of the inner liner, the first notch being exposed circumferentially in the seal, and the first notch also extending axially in the seal toward a side opposite to the inner liner.

[0017] The first gap forms the first diversion channel.

[0018] In one possible implementation, the first gap is a strip-shaped structure.

[0019] In one possible implementation, the first flow channel is a through hole in the seal in the circumferential direction.

[0020] In one possible implementation, a press-fitting component is also included, comprising a mounting portion and a connecting portion connected together. The mounting portion is sleeved around the second end of the water pipe and located within the seal. The mounting portion also has a third gap cavity between itself, the seal, and the water pipe. The connecting portion is located on the side of the mounting portion opposite to the water pipe and is connected to the outer casing.

[0021] The seal has a second flow channel in the circumferential direction. The second flow channel is located at one end of the seal adjacent to the outer shell and connects the cavity and the third gap cavity. The thermal insulation filler is also filled into the third gap cavity through the second flow channel.

[0022] In one possible implementation, the number of second flow channels is multiple.

[0023] In one possible implementation, the second flow channel is a through-hole in the circumferential direction of the seal, or...

[0024] The seal has a second notch on the end face near one end of the outer casing. The second notch is exposed circumferentially in the seal and also extends axially toward the inner liner.

[0025] The second gap forms a second diversion channel.

[0026] The water heater provided in this application includes an outer shell; an inner tank located inside the outer shell and having a cavity between it and the inner wall of the outer shell; a water pipe located between the inner tank and the outer shell, with a first end of the water pipe installed in the inner tank and a second end of the water pipe exposed outside the outer shell; a sealing element sleeved around the water pipe and fixed relative to the water pipe, with a first gap cavity between the sealing element, the water pipe, and the inner tank; a first flow channel located around the sealing element near the end of the sealing element adjacent to the inner tank and connecting the cavity and the first gap cavity; and a thermal insulation filler filling the cavity and filling the first gap cavity through the first flow channel. After the thermal insulation filler solidifies, it forms a thermal insulation structure, thereby making the thermal insulation structure an integral structure, preventing external impurities from entering through the first gap cavity and corroding the inner tank, and ensuring the thermal insulation performance of the thermal insulation structure. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] Figure 1 A schematic diagram of the structure of a water heater provided in an embodiment of this application. Figure 1 ;

[0029] Figure 2 for Figure 1 A schematic diagram of a structure filled with thermal insulation material;

[0030] Figure 3 for Figure 1 Schematic diagram of the middle sealing element Figure 1 ;

[0031] Figure 4 for Figure 1 Schematic diagram of the middle sealing element Figure 2 .

[0032] Explanation of reference numerals in the attached figures:

[0033] 100 - Outer shell;

[0034] 200-Inner Liner;

[0035] 300-water pipe;

[0036] 400 - Seal; 410 - First notch; 420 - Second notch; 430 - First flow channel; 440 - Second flow channel;

[0037] 500 - Cavity; 510 - First cavity; 520 - Second cavity; 530 - Third cavity;

[0038] 600 - Press-fit component; 610 - Mounting part; 620 - Connecting part;

[0039] 700 - Thermal insulation filler.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of the embodiments of this application.

[0042] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are mainly for better describing the embodiments of this application and their implementations, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in the embodiments of this application can be understood according to the specific circumstances.

[0043] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0044] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0045] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] Unless otherwise stated, the term "multiple" means two or more.

[0047] As described in the background section, a water heater is a device used to heat and store hot water, typically comprising an inner tank, an outer shell, and an insulation layer between them. The inner tank stores the hot water, while the insulation layer reduces heat loss and improves the water heater's energy efficiency. To achieve good insulation, polyurethane foam is usually filled between the inner tank and the outer shell as an insulation layer. Polyurethane foam has excellent insulation properties and can effectively reduce heat transfer.

[0048] A water heater consists of water pipes, an outer shell, and an inner tank. The water pipes pass through the outer shell and are inserted into the inner tank for water inlet and outlet connections. To prevent the foaming material from overflowing, a foaming material retainer is installed between the inner tank and the outer shell to block the flow of the foaming material and prevent it from overflowing from the gap between the water pipes and the outer shell.

[0049] However, there will be gaps between the foamed material retaining ring and the water pipe and inner liner. The foamed material cannot fill the gaps, and external impurities can easily enter through the gaps and corrode the inner liner.

[0050] This application provides a water heater, including an outer shell; an inner tank located inside the outer shell and having a cavity between it and the inner wall of the outer shell; a water pipe located between the inner tank and the outer shell, with a first end of the water pipe installed in the inner tank and a second end of the water pipe exposed outside the outer shell; a sealing element sleeved around the water pipe and fixed relative to the water pipe, with a first gap cavity between the sealing element, the water pipe, and the inner tank; a first flow channel located around the sealing element near the end of the sealing element adjacent to the inner tank and connecting the cavity and the first gap cavity; and a thermal insulation filler filling the cavity and filling the first gap cavity through the first flow channel. After the thermal insulation filler cures, it forms a thermal insulation structure, thereby making the thermal insulation structure an integral structure, preventing external impurities from entering through the first gap cavity and corroding the inner tank, and ensuring the thermal insulation performance of the thermal insulation structure.

[0051] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0052] Please see Figures 1 to 4 This embodiment provides a water heater, including a shell 100; an inner tank 200 located inside the shell 100 and having a cavity 500 between it and the inner wall of the shell 100; a water pipe 300 located between the inner tank 200 and the shell 100, with a first end of the water pipe 300 installed in the inner tank 200 and a second end of the water pipe 300 exposed outside the shell 100; and a sealing member 400 sleeved around the circumference of the water pipe 300 and fixed relative to the water pipe 300. 00. A first cavity 510 is provided between the water pipe 300 and the inner liner 200; a first flow channel 430 is provided in the circumferential direction of the sealing element 400, the first flow channel 430 is located at one end of the sealing element 400 adjacent to the inner liner 200, and connects the cavity 500 and the first cavity 510; thermal insulation filler 700 is filled in the cavity 500 and is filled in the first cavity 510 through the first flow channel 430, and the thermal insulation filler 700 forms a thermal insulation structure after curing.

[0053] Specifically, the outer casing 100 is the external protective structure of the water heater, used to support and protect the internal components and prevent damage to the internal structure from the external environment. The inner tank 200 is located inside the outer casing 100 and is used to store hot water, ensuring that the hot water is not contaminated and is not easily corroded during heating and storage.

[0054] A water pipe 300 is installed between the inner tank 200 and the outer shell 100. The first end of the water pipe 300 is installed on the inner tank 200, and the second end is installed on the outer shell 100 and exposed outside the outer shell 100, so as to connect the inner tank 200 with the external water supply system to realize the supply and discharge of hot water.

[0055] In order to ensure the thermal insulation performance of the inner liner 200, this embodiment fills the cavity 500 formed between the inner liner 200 and the outer shell 100 with thermal insulation filler 700. After the thermal insulation filler 700 is cured, it forms a thermal insulation structure to reduce heat loss and ensure the thermal insulation performance of the inner liner 200.

[0056] In this embodiment, the insulation filler 700 is a polyurethane foam material. During the filling process, the polyurethane foam material can fully fill the cavity 500 between the inner tank 200 and the outer shell 100. After the polyurethane foam material is cured, it can form an insulation structure, effectively reducing the transfer of heat from the inner tank 200 to the external environment and improving the insulation efficiency of the water heater.

[0057] To prevent the insulation filler 700 from overflowing from the connection between the water pipe 300 and the outer shell 100 during the filling process, the water heater provided in this embodiment also includes a sealing element 400. The sealing element 400 is sleeved around the water pipe 300 and fixed relative to the water pipe 300. The sealing element 400 abuts against the inner wall of the outer shell 100, thereby preventing the insulation filler 700 from overflowing from the connection between the water pipe 300 and the outer shell 100.

[0058] However, due to manufacturing tolerances or other factors, a certain gap exists between the water pipe 300 and the sealing element 400, preventing a tight fit. Simultaneously, a gap also exists between the sealing element 400 and the inner liner 200. This creates a first void cavity 510 between the water pipe 300, the inner liner 200, and the sealing element 400. Because the insulation filler 700 has poor fluidity relative to water, it cannot fill this first void cavity 510, preventing the insulation structure from forming a unified structure and reducing its insulation performance. In actual use, external impurities may enter through the first void cavity 510 and corrode the inner liner 200 and the water pipe 300. For example, rainwater may seep in and corrode the inner liner 200 and the water pipe 300.

[0059] To solve the above problems, the sealing element 400 provided in this embodiment also has a first flow channel 430 in the circumferential direction. The first flow channel 430 is interconnected with the first cavity 510, so that when filling, the heat insulation filler 700 can flow into the first cavity 510 through the first flow channel 430, so that the heat insulation structure forms an integral structure, preventing external impurities from entering the cavity 500 through the first cavity 510, and improving the heat insulation performance of the water heater.

[0060] The shape and size of the first flow channel 430 can be adapted to actual needs, and this embodiment does not impose any restrictions on this. For example, the first flow channel 430 is a rectangular channel.

[0061] Please see Figures 1 to 4 In some embodiments, the seal 400 may also abut against the outer wall of the inner liner 200, that is, the length of the seal 400 along the axial direction of the water pipe 300 may be slightly greater than the distance between the inner liner 200 and the outer shell 100, thereby being disposed between the inner liner 200 and the outer shell 100 by interference fit, so as to prevent the insulation filler 700 from overflowing from the connection between the water pipe 300 and the inner liner 200 during the filling process.

[0062] Please see Figures 1 to 4 In some embodiments, the number of first flow channels 430 is multiple.

[0063] Specifically, in this embodiment, there are multiple first flow channels 430, and each first flow channel 430 is interconnected with the first void cavity 510, thereby ensuring that the thermal insulation filler 700 can be fully filled into the first void cavity 510, avoiding weak points in the thermal insulation structure due to uneven filling, and further improving the overall performance and thermal insulation effect of the thermal insulation structure.

[0064] Please see Figures 1 to 4 In some embodiments, a plurality of first flow channels 430 are spaced apart in the circumferential direction of the seal 400, and the spacing between adjacent first flow channels 430 is equal.

[0065] Specifically, in this embodiment, multiple first flow channels 430 are evenly distributed along the circumference of the seal 400, and the interval between adjacent first flow channels 430 is equal. This allows the insulation filler 700 to flow evenly into the first cavity 510 from multiple directions during the filling process, ensuring the uniformity of the flow of the insulation filler 700 during the filling process, avoiding excessive or insufficient filling in some areas, thereby achieving a more uniform filling effect and further improving the insulation effect of the insulation structure.

[0066] In some embodiments, the seal 400 is press-fitted with the circumferential outer wall of the water pipe 300 at least at one end adjacent to the inner liner 200, or, the circumferential inner wall of the seal 400 and the circumferential outer wall of the water pipe 300 have a second cavity 520, the second cavity 520 communicates with the first cavity 510, and the thermal insulation filler 700 is also filled into the second cavity 520 via the first cavity 510.

[0067] Specifically, in some embodiments, the sealing element 400 is press-fitted with the circumferential outer wall of the water pipe 300 at least one end adjacent to the inner liner 200, thereby achieving a tight fit between the sealing element 400 and the water pipe 300, preventing the insulation filler 700 from overflowing from the gap between the sealing element 400 and the water pipe 300 during the filling process, thus ensuring that the insulation filler 700 is only filled in the first void cavity 510, ensuring the integrity and insulation performance of the insulation structure.

[0068] Meanwhile, by adopting an interference fit connection method, the connection strength between the seal 400 and the water pipe 300 is enhanced, preventing the seal 400 from loosening or shifting due to vibration or other factors during use. This improves the stability and sealing of the connection between the seal 400 and the water pipe 300, and extends the service life of the water heater.

[0069] Please see Figures 1 to 4 In other embodiments, a second cavity 520 exists between the inner circumferential wall of the seal 400 and the outer circumferential wall of the water pipe 300. The second cavity 520 is connected to the first cavity 510. This allows the insulation filler 700 to not only fill the first cavity 510 during the filling process, but also to further fill the second cavity 520 through the first cavity 510. This further enhances the sealing performance of the insulation structure, prevents external impurities or moisture from penetrating the insulation structure, avoids moisture damage to the insulation structure and corrosion of the inner tank 200, and extends the service life of the water heater.

[0070] Please see Figures 1 to 4 In some embodiments, the seal 400 has a first notch 410 on an end face adjacent to one end of the inner liner 200. The first notch 410 is exposed in the circumferential direction of the seal 400 and also extends axially along the seal 400 toward the side opposite to the inner liner 200, forming a first flow channel 430.

[0071] Specifically, in this embodiment, the seal 400 has a first notch 410 on the end face of one end adjacent to the inner liner 200. The first notch 410 is exposed in the circumferential direction of the seal 400 and extends along the axial direction of the seal 400 toward the side opposite to the inner liner 200, forming a first flow channel 430.

[0072] The first notch 410 can be rectangular, trapezoidal, circular or other shapes. This embodiment does not impose any restrictions on this and can make an adaptive selection according to actual needs.

[0073] By setting the first notch 410 to form the first flow channel 430, the insulation filler 700 can flow smoothly into the first gap cavity 510 between the seal 400, the water pipe 300 and the inner liner 200, ensuring that the insulation filler 700 can be evenly filled to all areas that need to be filled, avoiding weak points in the insulation structure caused by uneven filling, thereby further enhancing the overall performance and insulation effect of the insulation structure.

[0074] In addition, the size of the first notch 410 can be set according to actual needs to accommodate water pipes 300 of different diameters and different filling process requirements.

[0075] In some embodiments, the first notch 410 is a strip structure.

[0076] Specifically, in this embodiment, the first notch 410 is a strip-shaped structure, that is, a rectangular opening extending circumferentially along the seal 400, so that the thermal insulation filler 700 can flow evenly into the first gap cavity 510 between the seal 400, the water pipe 300 and the inner liner 200 along the length direction of the strip-shaped first notch 410 during the filling process.

[0077] The length of the first notch 410 can be adapted to the perimeter of the seal 400 and the filling requirements to ensure that the thermal insulation filler 700 can be fully and evenly filled into the first cavity 510. This embodiment does not impose any restrictions on this.

[0078] In some embodiments, the first flow channel 430 is a through hole in the circumferential direction of the seal 400.

[0079] Specifically, the through hole penetrates the circumferential inner and outer walls of the sealing element 400 to form a first flow channel 430. During the filling process, the thermal insulation filler 700 can flow directly into the first void cavity 510 between the sealing element 400, the water pipe 300 and the inner liner 200 through the first flow channel 430. This ensures that the thermal insulation filler 700 can be evenly filled into the first void cavity 510, while improving the filling efficiency and enhancing the overall performance and thermal insulation effect of the thermal insulation structure.

[0080] Please see Figures 1 to 4 In some embodiments, the water heater further includes a press-fit member 600, which includes a mounting portion 610 and a connecting portion 620 connected together. The mounting portion 610 is sleeved around the second end of the water pipe 300 and located within the seal 400. The mounting portion 610 also has a third gap cavity 530 between itself, the seal 400, and the water pipe 300. The connecting portion 620 is located on the side of the mounting portion 610 away from the water pipe 300 and is connected to the housing 100.

[0081] Specifically, in this embodiment, the press-fit member 600 includes a connected mounting portion 610 and a connecting portion 620. The mounting portion 610 is sleeved around the second end of the water pipe 300 and located inside the sealing member 400 to connect the press-fit member 600 to the water pipe 300 and fix the second end of the water pipe 300. The connecting portion 620 is located on the side of the mounting portion 610 away from the water pipe 300 and is connected to the outer casing 100 to cover the water pipe 300, thereby ensuring the aesthetics of the water heater outer casing 100.

[0082] To ensure the stability of the connection, in this embodiment, the mounting part 610 and the second end are fitted with an interference fit, that is, the inner diameter of the mounting part 610 is slightly smaller than the outer diameter of the second end, thereby achieving a tight connection between the pressing part 600 and the water pipe 300 and preventing the pressing part 600 or the water pipe 300 from falling off.

[0083] Specifically, due to manufacturing errors or other factors, a third void 530 may form between the end faces of the mounting section 610 and the sealing element 400, and between the water pipe 300. The presence of this third void 530 prevents the insulation filler 700 from completely filling it, creating a weak point in the insulation structure and affecting its insulation performance. Furthermore, external impurities or moisture may enter through the third void 530, leading to corrosion between the water pipe 300 and the mounting section 610, thereby affecting the water heater's lifespan and reliability.

[0084] Therefore, in this embodiment, the seal 400 has a second flow channel 440 in the circumferential direction. The second flow channel 440 is located at one end of the seal 400 adjacent to the outer shell 100 and connects the cavity 500 and the third cavity 530. The thermal insulation filler 700 is also filled into the third cavity 530 through the second flow channel 440. In this way, when filling the thermal insulation filler 700, the thermal insulation filler 700 can be further filled into the third cavity 530 through the second flow channel 440, thereby avoiding weak points in the thermal insulation structure caused by the third cavity 530 not being filled. At the same time, it can also prevent moisture from accumulating in the third cavity 530, thereby reducing the risk of corrosion and improving the service life and reliability of the water heater.

[0085] Please see Figures 1 to 4 In some embodiments, there are multiple second flow channels 440, which ensures that the insulation filler 700 can flow into the third cavity 530 evenly from multiple directions during the filling process, avoiding weak points in the insulation structure caused by insufficient filling of the third cavity 530, and preventing corrosion problems caused by moisture accumulation in the third cavity 530, thereby improving the service life and reliability of the water heater.

[0086] In some embodiments, the second flow channel 440 is a through hole in the circumferential direction of the seal 400, or the seal 400 has a second notch 420 on the end face adjacent to one end of the outer casing 100, the second notch 420 being exposed in the circumferential direction of the seal 400, and the second notch 420 also extending along the axial direction of the seal 400 toward the inner liner 200, the second notch 420 forming the second flow channel 440.

[0087] Specifically, in this embodiment, the second flow channel 440 is a through hole in the circumferential direction of the sealing element 400. The through hole penetrates the inner and outer circumferential walls of the sealing element 400 to form the second flow channel 440. During the filling process, the thermal insulation filler 700 can flow directly into the third gap cavity 530 between the sealing element 400, the water pipe 300 and the inner liner 200 through the second flow channel 440. This ensures that the thermal insulation filler 700 can be uniformly filled into the third gap cavity 530, while improving the filling efficiency and enhancing the overall performance and thermal insulation effect of the thermal insulation structure.

[0088] Please see Figures 1 to 4 In other embodiments, the seal 400 has a second notch 420 on an end face adjacent to one end of the housing 100. The second notch 420 is exposed circumferentially to the seal 400 and also extends axially toward one side of the seal 400 toward the inner liner 200, forming a second flow channel 440.

[0089] Specifically, in this embodiment, the seal 400 has a second notch 420 on the end face of one end adjacent to the outer shell 100. The second notch 420 is exposed in the circumferential direction of the seal 400 and extends along the axial direction of the seal 400 toward the side opposite to the inner liner 200, forming a second flow channel 440.

[0090] The second notch 420 can be rectangular, trapezoidal, circular or other shapes. This embodiment does not impose any restrictions on this and can make an adaptive selection according to actual needs.

[0091] By setting the second notch 420 to form the second flow channel 440, the insulation filler 700 can flow smoothly into the third cavity 530 between the seal 400, the water pipe 300 and the pressing member 600, ensuring that the insulation filler 700 can be evenly filled to all areas that need to be filled, avoiding weak points in the insulation structure caused by uneven filling, thereby further enhancing the overall performance and insulation effect of the insulation structure.

[0092] In addition, the size of the second notch 420 can be set according to actual needs to accommodate water pipes 300 of different diameters and different filling process requirements.

[0093] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A water heater, characterized in that, include: shell; The inner liner is located inside the outer shell and has a cavity between it and the inner wall of the outer shell; A water pipe is located between the inner liner and the outer shell, with a first end of the water pipe installed in the inner liner and a second end of the water pipe exposed outside the outer shell. A sealing element is sleeved around the water pipe and fixed relative to the water pipe. A first gap cavity is formed between the sealing element, the water pipe, and the inner liner. A first flow channel is formed around the sealing element. The first flow channel is located at one end of the sealing element adjacent to the inner liner and connects the cavity and the first gap cavity. Thermal insulation filler is filled into the cavity and then into the first gap cavity via the first flow channel. After the thermal insulation filler solidifies, it forms a thermal insulation structure.

2. The water heater according to claim 1, characterized in that, The number of the first flow guiding channels is multiple.

3. The water heater according to claim 2, characterized in that, The plurality of the first flow channels are spaced apart in the circumferential direction of the seal, and the spacing between adjacent first flow channels is equal.

4. The water heater according to claim 1, characterized in that, The seal is press-fitted against the outer circumferential wall of the water pipe at least on the inner wall of the inner liner at one end, or... There is a second cavity between the inner circumferential wall of the seal and the outer circumferential wall of the water pipe. The second cavity is connected to the first cavity, and the thermal insulation filler is also filled into the second cavity through the first cavity.

5. The water heater according to any one of claims 1-4, characterized in that, The seal has a first notch on one end face adjacent to the inner liner, the first notch being exposed circumferentially on the seal, and the first notch also extending axially on the seal toward the side opposite to the inner liner. The first gap forms the first flow channel.

6. The water heater according to claim 5, characterized in that, The first gap is a strip-shaped structure.

7. The water heater according to any one of claims 1-4, characterized in that, The first flow channel is a through hole in the circumferential direction of the seal.

8. The water heater according to any one of claims 1-4, characterized in that, It also includes a press-fit component, which includes a mounting portion and a connecting portion connected together. The mounting portion is sleeved around the second end of the water pipe and located inside the sealing element. The mounting portion also has a third gap cavity between the mounting portion, the sealing element, and the water pipe. The connecting portion is located on the side of the mounting portion away from the water pipe and is connected to the outer shell. The seal has a second flow channel in the circumferential direction. The second flow channel is located at one end of the seal adjacent to the outer shell and connects the cavity and the third gap cavity. The thermal insulation filler is also filled into the third cavity via the second flow channel.

9. The water heater according to claim 8, characterized in that, The number of the second flow channels is multiple.

10. The water heater according to claim 8, characterized in that, The second flow channel is a through hole in the circumferential direction of the seal, or... The seal has a second notch on one end face adjacent to the outer shell, the second notch being exposed circumferentially in the seal and also extending axially toward the inner liner. The second gap forms the second flow channel.

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