Heat exchange type water tank liner and water heater

Abstract

The application relates to the technical field of water heaters, in particular to a heat exchange type water tank inner container and a water heater, which comprises the following: a deep-drawing formed inner container main body, the inner container main body is a hexahedron, one of the six faces is provided with an opening, and the other five faces are provided in a closed mode; a top cover, the top cover covers above the opening; a sealing element, the sealing element is arranged between the inner container main body and the top cover; and a fixing element, the fixing element is fixed with the inner container main body after penetrating through the top cover and the sealing element. Compared with the prior art, the inner container main body in the application forms five closed faces through deep-drawing forming, only one opening is reserved for cooperation with the top cover, the structure reduces the probability of poor welding; secondly, the welding seam is avoided from being soaked in the heat exchange medium for a long time, and the risk of liquid leakage caused by perforation due to corrosion is reduced; in addition, the fixing element connection mode enables the top cover to be detachable, solves the problem that internal parts cannot be replaced due to damage under the existing welding structure, and thus comprehensive improvement is realized in production convenience, use safety and maintenance flexibility.

Description

Technical Field

[0001] This application relates to the field of water heater technology, and in particular to a heat exchange type water tank inner liner and water heater. Background Technology

[0002] The inner tank of a heat exchange water tank is a key component in a heat exchange electric water heater used to store the heat exchange medium. In existing technologies, its structure is mostly designed as an upper and lower structure (composed of upper and lower covers and the tank body) or a left and right structure (composed of left and right covers and the tank body) to meet the needs of equipment volume control and is widely used in various types of heat exchange electric water heaters.

[0003] The inner tank of existing heat exchange water tanks is usually formed by bending and welding sheet metal. The end caps (upper and lower caps or left and right caps) are welded to the tank body to achieve a sealed connection, forming a closed cavity to store the heat exchange medium and provide basic space for heat exchange between the heat exchange tubes and the heat exchange medium.

[0004] However, the existing welded sealing structure has obvious defects. Its welds are long and the welding area is large, which not only leads to a high welding defect rate and low production efficiency, but also causes corrosion of the welds when the heat exchange medium is liquid, which poses a risk of leakage. At the same time, the welded structure makes it impossible to disassemble and replace the internal parts of the inner tank after damage. Overall, it has problems with insufficient performance in terms of production, use and maintenance. Utility Model Content

[0005] This application provides a heat exchange water tank inner liner to solve the technical problem that the welded sealing structure used in the prior art has insufficient overall performance in terms of production, use and maintenance.

[0006] In a first aspect, this application provides a heat exchange water tank inner liner, comprising:

[0007] The inner liner body is a deep-drawn form, wherein the inner liner body is a hexahedron with one face having an opening and the other five faces being closed.

[0008] A top cover that covers the opening;

[0009] A sealing element is disposed between the inner liner body and the top cover;

[0010] A fastener, which passes through the top cover and the sealing element and is then fixed to the inner liner body.

[0011] Furthermore, the opening surface of the inner liner body is the top surface, and the four sides of the top surface are provided with outwardly extending flanges. The flanges are provided with multiple connecting holes, and the fasteners cooperate with the connecting holes.

[0012] Furthermore, both the top cover and the sealing element are provided with through holes corresponding to the connecting hole, and the fixing element is sequentially passed through the through holes and locked with the connecting hole.

[0013] Furthermore, the surface of the top cover is a stamped structure, which is formed by the top cover being recessed into the inner liner body.

[0014] Furthermore, the inner liner body is provided with heat exchange tube mounting holes, heater mounting holes, water level sensor mounting holes, and temperature measuring blind tube mounting holes, all of which are located above the preset heat exchange medium liquid surface of the inner liner body.

[0015] Furthermore, the inner liner body is provided with a heat exchange tube, a heater, a water level sensor, and a temperature measuring blind tube. The heat exchange tube is connected to the inner liner body through the heat exchange tube mounting hole, the heater is connected to the inner liner body through the heater mounting hole, the water level sensor is connected to the inner liner body through the water level sensor mounting hole, and the temperature measuring blind tube is connected to the inner liner body through the temperature measuring blind tube mounting hole.

[0016] Furthermore, the bottom of the inner tank body is provided with a drain connector mounting hole, a drain connector is installed at the drain connector mounting hole, an exhaust overflow pipe is provided through the center of the drain connector and inserted into the inner tank body, and the top of the exhaust overflow pipe is close to the top cover and higher than the heat exchange medium liquid level.

[0017] Furthermore, the inner tank body is also provided with a water supply connector mounting hole, the water supply connector mounting hole is higher than the heat exchange medium liquid level, a water supply connector is installed at the water supply connector mounting hole, and the water supply connector is connected to an external liquid supply pipeline.

[0018] Furthermore, the water supply connector has a boss at one end near the inner liner body, and the other end is placed in the external space and is threaded. There is a gap between the boss and the inner wall of the inner liner body, and a sealing ring is provided at the gap.

[0019] Secondly, this application also provides a water heater, including a controller and a heat exchange water tank liner as described in the first aspect, wherein the controller is electrically connected to the heat exchange water tank liner.

[0020] The technical solution provided in this application has the following advantages compared with the prior art:

[0021] In this application, the inner liner body is formed into five closed surfaces through deep drawing, leaving only one opening for mating with the top cover. Compared to existing welded barrel bodies, this significantly reduces the number of welds. Simultaneously, the top cover and inner liner body are sealed by a sealing element and secured by a fastener, replacing the traditional welded sealing method. This structure firstly reduces weld length and welding area, lowering the probability of weld defects and improving production efficiency. Secondly, it avoids the welds being immersed in the heat exchange medium for extended periods, reducing the risk of perforation and leakage due to corrosion. Furthermore, the fastener connection method allows the top cover to be detachable, solving the problem of irreplaceable damaged internal parts in existing welded structures, thus achieving a comprehensive improvement in production convenience, usage safety, and maintenance flexibility. Attached Figure Description

[0022] 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.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0025] Figure 1 This is a schematic diagram of the structure of a heat exchange water tank inner liner provided in an embodiment of this application;

[0026] Figure 2 for Figure 1 Schematic diagram of the structure of the inner liner;

[0027] Figure 3 for Figure 1 Exploded view;

[0028] Figure 4 for Figure 1 Schematic diagram of the internal structure of the inner liner body;

[0029] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0030] Figure 6 for Figure 4 A magnified view of a portion of point B in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Inner tank body; 11. Opening; 12. Flange; 121. Connecting hole; 13. Heat exchanger tube mounting hole; 14. Heater mounting hole; 15. Water level sensor mounting hole; 16. Temperature measuring blind tube mounting hole; 17. Sewage drain connector mounting hole; 171. Sewage drain connector; 18. Water supply connector mounting hole; 181. Water supply connector; 1811. Boss; 182. Sealing ring;

[0033] 2. Top cover; 21. Through hole; 22. Pressed structure;

[0034] 3. Sealing components; 4. Fixing components; 5. Heat exchange tubes; 6. Heaters; 7. Water level sensors; 8. Temperature measuring blind tubes; 9. Exhaust overflow pipes. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0037] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0038] To address the technical problem of insufficient overall performance in production, use, and maintenance of existing welded sealing structures, this application provides a heat exchange water tank inner liner and water heater. The inner liner body 1 adopts a weld-free structure. This structure firstly reduces the weld length and welding area, lowering the probability of welding defects and helping to improve production efficiency. Secondly, it avoids the weld from being immersed in the heat exchange medium for a long time, reducing the risk of perforation and leakage due to corrosion. In addition, the connection method of the fastener 4 makes the top cover 2 detachable, solving the problem of the inability to replace damaged internal parts under existing welded structures, thereby achieving a comprehensive improvement in production convenience, use safety, and maintenance flexibility.

[0039] Please see Figures 1 to 6 The present application provides a heat exchange water tank inner liner, comprising: a deep-drawn inner liner body 1, the inner liner body 1 being a hexahedron, one face having an opening 11 and the other five faces being closed; a top cover 2, the top cover 2 covering the opening 11; a sealing member 3, the sealing member 3 being disposed between the inner liner body 1 and the top cover 2; and a fixing member 4, the fixing member 4 passing through the top cover 2 and the sealing member 3 and being fixed to the inner liner body 1.

[0040] Specifically, in this embodiment, the inner liner body 1 is a hexahedral metal shell manufactured using a deep drawing process. Five closed surfaces (left, right, front, back, and bottom) and a top opening 11 form an integral structure. Deep drawing ensures uniform wall thickness (no welded seams) and significantly improves mechanical strength. The top cover 2 is a flat or slightly arched metal piece that matches the opening 11. It is pressed against the inner liner body 1 by a sealing element 3, thus covering the opening 11 to form a complete sealed cavity. The sealing element 3 fills the microscopic gap between the inner liner body 1 and the top cover 2, and undergoes elastic deformation under the pre-tightening force of the fixing element 4, achieving a leak-free seal. The fixing element 4 (such as a screw) is evenly distributed around the circumference of the top cover 2, passes through the top cover 2 and the sealing element 3, and is screwed into the threaded hole of the inner liner body 1, forming a detachable rigid connection. This structure achieves sealing of the five sides of the inner liner body 1 without welding through deep drawing, reducing the splicing process; the connection method of the sealing component 3 and the fixing component 4 achieves sealing of the opening 11 while avoiding the complicated process of traditional welding sealing; and the detachable feature of the fixing component 4 facilitates the disassembly and assembly of the top cover 2, making the maintenance operation inside the inner liner more convenient.

[0041] It is understood that the sealing element 3 in this embodiment is high-temperature resistant silicone rubber. In other embodiments, the sealing element 3 may also be made of materials with sealing properties such as flexible graphite. Rubber materials, with their good elasticity and deformation ability, can tightly fit the connection surface between the inner liner body 1 and the top cover 2 to form a reliable seal. Flexible graphite has good temperature resistance and chemical stability, and can adapt to the environment in which the heat exchange medium is located. The specific choice can be made according to the actual situation, and is not limited here.

[0042] like Figure 1-3 As shown, the opening surface of the inner liner body 1 is the top surface, and the four sides of the top surface are provided with outwardly extending flanges 12. Multiple connecting holes 121 are provided on the flanges 12, and the fasteners 4 cooperate with the connecting holes 121.

[0043] Specifically, the top surface of the inner liner body 1 has four horizontally extending flanges 12 on its four sides, the thickness of which is the same as the wall thickness of the body (one-piece molding). The flanges 12 have evenly spaced threaded holes located on their central axis, with diameters matching standard screw specifications (e.g., M4 to M6). The fastener 4 (screw) passes through the top cover 2 and is screwed into the connecting hole 121, creating an axial locking force. The outward extension of the flanges 12 forms a rigid support platform, ensuring that the locking force of the fastener 4 is evenly transmitted along the plane of the flanges 12, guaranteeing uniform stress on the sealing element 3. As a stress diffusion structure, the flanges 12 distribute the load of the top cover 2 to the sidewalls of the inner liner, improving deformation resistance and enhancing seismic resistance.

[0044] like Figure 2-3 As shown, both the top cover 2 and the sealing element 3 are provided with through holes 21 corresponding to the connecting hole 121. The fixing element 4 passes through the through holes 21 in sequence and locks with the connecting hole 121.

[0045] Specifically, a through hole is formed on the edge of the top cover 2, with a diameter slightly larger than the diameter of the fastener 4 (clearance fit), to guide the fastener 4 through axially. A through hole is formed at the corresponding position of the seal 3, with a diameter consistent with the through hole 21 of the top cover 2, forming a continuous through channel. The connecting hole 121 (threaded hole) on the inner liner flange 12 is coaxially aligned with the through hole 21 of the top cover 2 and the through hole 21 of the seal 3. The fastener 4 (screw) passes through the through hole 21 of the top cover 2 and the through hole 21 of the seal 3 in sequence, and then locks with the threaded hole of the flange 12, forming a three-layer coaxial series structure. This structure, through the corresponding design of the through hole 21 and the connecting hole 121, ensures that the fastener 4 can be accurately inserted and positioned, avoiding misalignment during installation; the way the fastener 4 passes through the through hole 21 in sequence and then locks with the connecting hole 121 ensures that the top cover 2, the seal 3 and the inner liner body 1 are tightly connected, improving the overall structural stability.

[0046] like Figure 5 As shown, the surface of the top cover 2 is a stamped molding structure 22, which is formed by the top cover 2 being recessed into the inner liner body 1.

[0047] Specifically, in this embodiment, pressure is applied to a metal sheet (such as stainless steel) using a mold to form a geometric structure recessed into the inner liner body on the surface of the top cover 2. The molding structure 22 is recessed vertically into the inner liner cavity, and the edge of the recess is rounded to the plane of the top cover 2 to avoid stress concentration. The molding structure 22 avoids the area of ​​the through hole 21 of the fastener 4 to ensure that the screw locking surface remains flat. The recessed area extends to the edge of the top cover 2, forming a mechanical complement with the compression area of ​​the seal 3. Through this structure, the stress induced by the continuous curvature transition area formed by the recess is evenly distributed, improving the deformation resistance of the top cover 2, that is, increasing the strength of the top cover 2.

[0048] As shown in Figure 2, the inner tank body 1 is provided with heat exchange tube mounting hole 13, heater mounting hole 14, water level sensor mounting hole 15 and temperature measuring blind tube mounting hole 16. The heat exchange tube mounting hole 13, heater mounting hole 14, water level sensor mounting hole 15 and temperature measuring blind tube mounting hole 16 are all located above the preset heat exchange medium liquid surface of the inner tank body 1.

[0049] Specifically, in this embodiment, all functional mounting holes (heat exchange tube 5, heater 6, water level sensor 7, and temperature measuring blind tube 8) are located in the upper half of the side wall of the inner tank body 1, with their distribution height strictly higher than the design liquid level baseline. The axes of the mounting holes are all perpendicular to the inner tank wall, ensuring that external connectors are inserted horizontally. Each mounting hole has a pre-embedded threaded bushing or a precision threaded hole, and the sealing ring 182 is tightened by an external nut to complete the seal (non-welded). The interface sealing surface is completely suspended above the liquid surface, with no part in contact with the heat exchange medium. In this way, zero medium contact can be achieved, and the mounting holes and connection structures are located in the gas phase space (the area above the liquid surface), completely avoiding electrochemical corrosion and greatly extending the life of metal joints.

[0050] like Figure 2-4 As shown, the inner tank body 1 is provided with a heat exchange tube 5, a heater 6, a water level sensor 7, and a temperature measuring blind tube 8. The heat exchange tube 5 is connected to the inner tank body 1 through the heat exchange tube mounting hole 13, the heater 6 is connected to the inner tank body 1 through the heater mounting hole 14, the water level sensor 7 is connected to the inner tank body 1 through the water level sensor mounting hole 15, and the temperature measuring blind tube 8 is connected to the inner tank body 1 through the temperature measuring blind tube mounting hole 16.

[0051] Specifically, the internal components in the inner liner body 1 are installed as follows: (1) One end of the heat exchange tube 5 is inserted into the inner liner body 1, and the other end passes through the heat exchange tube mounting hole 13. It is then fixed and sealed externally using fasteners (such as nuts). The mounting hole is a circular through hole, matching the outer diameter of the heat exchange tube 5, ensuring stable fixation of the heat exchange tube 5 during operation. It is also equipped with a sealing ring 182 (such as a rubber gasket) to prevent media leakage. The heat exchange tube 5 is arranged in a spiral or U-shape within the inner liner body 1 to maximize the heat exchange surface area; (2) The heating part of the heater 6 extends into the inner liner body 1. The connecting end passes through the heater mounting hole 14 and is fixed externally using a locking device. The mounting hole is equipped with a sealing ring 182 (such as a rubber gasket) to prevent media leakage. The heater 6 is installed close to the bottom of the inner tank to ensure that the heating part can still be effectively submerged when the liquid level is low. This connection method allows the heater 6 to be replaced separately without disassembling the inner tank body 1; (3) The detection end of the water level sensor 7 extends into the inner tank body 1, and the signal end passes through the mounting hole and is locked externally with a fastener 4 (such as a nut). The mounting hole is designed with a threaded structure to facilitate quick installation and removal of the sensor. The sensor is installed vertically to accurately detect changes in liquid level. At the same time, the design of the sensor above the preset liquid level can prevent it from being disturbed by fluid turbulence; (4) One end of the temperature measuring blind tube 8 is inserted into the inner tank body 1, and the other end passes through the mounting hole and is fixed externally with a sealing nut. The temperature measuring blind tube 8 is installed vertically inside the inner tank body 1 to accurately measure the temperature distribution of the medium; the connection structure supports convenient replacement of the temperature measuring blind tube 8 during maintenance.

[0052] Furthermore, the working principle of the water heater's inner tank is as follows: the heat exchange medium (such as antifreeze or water) is stored in the inner tank and preheated by the heater 6. Tap water flows through the spiral heat exchange tube 5 immersed in the medium to absorb heat. When cold water enters the heat exchange tube 5, it absorbs heat from the medium through the copper tube wall (high thermal conductivity). The heated water flows out from the outlet. The heater 6 continuously compensates for the heat loss of the medium. The temperature measuring blind tube 8 monitors the temperature in real time and feeds it back to the controller. At the same time, the exhaust overflow pipe 9 is used to connect the inner tank of the water tank to the atmosphere. During the heating process of the heat exchange medium, gas is discharged, and when the inner tank of the water tank is abnormally replenished, excess liquid can be discharged to prevent the inner tank of the water tank from being deformed by pressure.

[0053] like Figure 1-2 and Figure 4As shown, the bottom of the inner tank body 1 is also provided with a drain connector mounting hole 17, and a drain connector 171 is installed at the drain connector mounting hole 17. An exhaust overflow pipe 9 is provided through the center of the drain connector 171 and inserted into the inner tank body 1. The top of the exhaust overflow pipe 9 is close to the top cover 2 and higher than the heat exchange medium liquid level.

[0054] Specifically, a dedicated circular through hole is opened at the bottom of the inner tank body 1, and the diameter of the hole matches the outer diameter of the drain connector 171. The drain connector 171 is fixed in the hole by a threaded connection. The exhaust overflow pipe 9 is a slender hollow tube that is inserted through the center of the drain connector 171. The top of the tube extends to the top space of the inner tank and is precisely positioned above the liquid level baseline. When the exhaust overflow pipe 9 is in the inserted state, the top opening 11 serves as a gas discharge channel. After the exhaust overflow pipe 9 is pulled out, the through hole of the drain connector 171 is exposed as a liquid discharge channel. In this structure, the drain connector 171 provides a channel for the discharge of dirt inside the inner tank body 1, facilitating regular cleaning and maintenance; the top of the exhaust overflow pipe 9 is higher than the liquid level, which can discharge the gas inside the inner tank, avoiding the accumulation of gas and affecting the heat exchange efficiency. At the same time, when the liquid level of the heat exchange medium exceeds the set height, the medium can be discharged through the exhaust overflow pipe 9, which plays an overflow protection role and prevents the medium from overflowing excessively; the overall structure integrates the drain and overflow exhaust functions through the drain connector 171 installed at the bottom, which simplifies the layout of additional functional components of the inner tank and improves the safety and convenience of use and maintenance.

[0055] like Figure 2 , Figure 4 and Figure 6 As shown, the inner tank body 1 is also provided with a water supply connector mounting hole 18. The water supply connector mounting hole 18 is higher than the heat exchange medium liquid level. A water supply connector 181 is installed at the water supply connector mounting hole 18 and is connected to an external liquid supply pipeline.

[0056] Specifically, the water supply connector mounting hole 18 is located on the upper half of the side wall of the inner tank body 1. It is a through hole with internal threads, and its axis is perpendicular to the inner tank wall. The water supply connector 181 is screwed into the internal thread of the mounting hole. The outer end is connected to a quick-connect liquid supply pipeline, and the inner end is suspended in the gas phase space. The entire water supply connector 181 and the fluid channel are located above the liquid level baseline. The replenished medium falls to the liquid surface by gravity (without splashing). This structure, by setting the water supply connector mounting hole 18 above the liquid level of the heat exchange medium, prevents the heat exchange medium in the inner tank from overflowing backward from the water supply connector 181. The connection design between the water supply connector 181 and the external liquid supply pipeline provides a stable channel for replenishing the heat exchange medium, facilitating timely replenishment as needed and improving ease of use.

[0057] like Figure 6As shown, the water supply connector 181 has a boss 1811 at one end near the inner tank body 1, and the other end is placed in the external space and is threaded. There is a gap between the boss 1811 and the inner wall of the inner tank body 1, and a sealing ring 182 is provided at the gap.

[0058] Specifically, the water supply connector 181 has an annular boss 1811 at one end near the inner tank body 1. The outer diameter of the boss 1811 is larger than the installation hole diameter, forming an axial limiting surface. A uniform annular gap is maintained between the boss 1811 and the inner wall of the inner tank. The gap width matches the compression space of the O-ring seal 182. The O-ring seal 182 is embedded in the annular gap, and radial sealing is achieved by the compression between the end face of the boss 1811 and the inner wall of the inner tank. The diameter of the sealing ring 182 is larger than the gap width in its natural state. After installation, it undergoes compression deformation to form a sealing interface. This structure, through the cooperation of the boss 1811 and the sealing ring 182, utilizes the gap to reserve installation space for the sealing ring 182. The sealing effect of the sealing ring 182 prevents the heat exchange medium from leaking from the connection between the water supply connector 181 and the inner tank body 1. At the same time, the limiting function of the boss 1811 ensures the installation stability of the sealing structure, improving the connection sealing performance while ensuring smooth liquid supply.

[0059] In another optional embodiment, this application also provides a water heater, including a controller and a heat exchange water tank inner tank as described in the above embodiment, wherein the controller is electrically connected to the heat exchange water tank inner tank.

[0060] Specifically, in practical applications, the heat exchanger tank inner liner serves as the core component for storing the heat exchange medium. The controller acquires the operating status information of the inner liner (such as liquid level and temperature-related signals) via electrical connection and sends control signals to relevant components within the inner liner (such as water replenishment control components) according to preset programs or external commands. This structure, through the electrical connection between the controller and the heat exchanger tank inner liner, enables real-time monitoring and automatic control of the inner liner's operating status. For example, when insufficient heat exchange medium is detected, water replenishment operations can be triggered to ensure that the heat exchange medium is maintained at a suitable level. Simultaneously, integrating the structural advantages of the heat exchanger tank inner liner, combined with the intelligent control of the controller, improves the overall stability and convenience of the water heater's operation, maintaining normal operation without frequent manual intervention.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] In the description of this application, 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0063] 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 application, "multiple" means two or more, unless otherwise explicitly specified.

[0064] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; 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 application according to the specific circumstances.

[0065] In this application, unless otherwise expressly 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 being 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 being 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.

[0066] 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 this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring 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.

[0067] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0068] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A heat exchange water tank inner liner, characterized in that, include: The inner liner body is a deep-drawn form, wherein the inner liner body is a hexahedron with one face having an opening and the other five faces being closed. A top cover that covers the opening; A sealing element is disposed between the inner liner body and the top cover; A fastener, which passes through the top cover and the sealing element and is then fixed to the inner liner body.

2. The heat exchange water tank inner liner according to claim 1, characterized in that, The opening surface of the inner liner body is the top surface, and the four sides of the top surface are provided with outwardly extending flanges. The flanges are provided with multiple connecting holes, and the fasteners cooperate with the connecting holes.

3. The heat exchange water tank inner liner according to claim 2, characterized in that, Both the top cover and the sealing element are provided with through holes corresponding to the connecting holes. The fixing element passes through the through holes in sequence and locks with the connecting holes.

4. The heat exchange water tank inner liner according to claim 3, characterized in that, The surface of the top cover is a stamped and formed structure, which is formed by the top cover being recessed into the inner liner body.

5. The heat exchange water tank inner liner according to claim 1, characterized in that, The inner liner body is provided with heat exchange tube mounting holes, heater mounting holes, water level sensor mounting holes and temperature measuring blind tube mounting holes. The heat exchange tube mounting holes, heater mounting holes, water level sensor mounting holes and temperature measuring blind tube mounting holes are all located above the preset heat exchange medium liquid surface of the inner liner body.

6. The heat exchange water tank inner liner according to claim 5, characterized in that, The inner tank body is provided with a heat exchange tube, a heater, a water level sensor and a temperature measuring blind tube. The heat exchange tube is connected to the inner tank body through the heat exchange tube mounting hole, the heater is connected to the inner tank body through the heater mounting hole, the water level sensor is connected to the inner tank body through the water level sensor mounting hole, and the temperature measuring blind tube is connected to the inner tank body through the temperature measuring blind tube mounting hole.

7. The heat exchange water tank inner liner according to claim 1, characterized in that, The bottom of the inner tank body is also provided with a drain connector mounting hole, and a drain connector is installed at the drain connector mounting hole. An exhaust overflow pipe is provided through the center of the drain connector and inserted into the inner tank body. The top of the exhaust overflow pipe is close to the top cover and higher than the heat exchange medium liquid level.

8. The heat exchange water tank inner liner according to claim 1, characterized in that, The inner tank body is also provided with a water supply connector mounting hole. The water supply connector mounting hole is higher than the heat exchange medium liquid level. A water supply connector is installed at the water supply connector mounting hole and is connected to an external liquid supply pipeline.

9. The heat exchange water tank inner liner according to claim 8, characterized in that, The water supply connector has a boss at one end near the inner liner body, and the other end is placed in the external space and is threaded. There is a gap between the boss and the inner wall of the inner liner body, and a sealing ring is provided at the gap.

10. A water heater, characterized in that, It includes a controller and a heat exchange water tank inner liner as described in any one of claims 1-9, wherein the controller is electrically connected to the heat exchange water tank inner liner.

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