Electric water heater

Abstract

The utility model relates to an electric water heater, it includes shell body, inner container spare, inlet and outlet water pipe group and instant heating module, inlet and outlet water pipe group includes the inlet water line and the outlet water line extending to the water storage inner chamber, and the one end of inlet water line extends to the outside of inner container spare and is communicated with intermediate pipeline or water supply pipeline through first conversion department, the one end of outlet water line extends to the outside of inner container spare and is communicated with intermediate pipeline or water using pipeline through second conversion department, instant heating module is installed on the inner container spare, includes shell body and sets up heating spare in shell body, wherein, the heating pipe section is formed on inlet water line, and heating pipe section sets up in shell body, and water body heats in instant heating module, realizes the purpose of heating water through the form of water heat exchange in heating spare and heating pipe section, can avoid the scale formation in the inner container, and instant heating module is installed on the inner container spare, is favorable to improve heat utilization ratio, and heating effect is good.

Description

Technical Field

[0001] This utility model belongs to the technical field of household appliance equipment, and in particular relates to an electric water heater. Background Technology

[0002] Electric water heaters are common household appliances. They are connected to an inlet and outlet water pipe assembly. Low-temperature water is transported to the inner tank of the water heater through the inlet water pipe assembly, heated in the inner tank, and then output from the outlet water pipe assembly.

[0003] The heating element heats the low-temperature water directly inside the inner tank, which easily leads to the accumulation of scale in the water inside the tank. This makes cleaning difficult and affects water quality. In addition, scale can also affect the heating effect of the heating element and cause corrosion to the inner tank. Existing technologies also exist that heat the water outside the inner tank before transporting it into the inner tank. However, the heating device used to heat the water is generally installed on the pipeline, which is cumbersome to install and fix. There is also the problem of waste heat during the heating process, resulting in poor heating effect. Utility Model Content

[0004] The purpose of this utility model is to provide an electric water heater to solve the problems existing in the prior art, such as the heating element of the existing electric water heater directly heating low-temperature water in the inner tank, the accumulation of scale in the water in the inner tank affecting water quality, the cumbersome assembly of the external heating device, and the ineffective utilization of waste heat.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: This utility model discloses an electric water heater, which includes: The outer casing has an internal mounting cavity formed therein; An inner liner is disposed in the mounting cavity, and a water storage cavity is formed within the inner liner. The water inlet and outlet pipe assembly includes an inlet pipe and an outlet pipe extending into the water storage cavity. One end of the inlet pipe extending to the outside of the inner tank is connected to an intermediate pipe or a water supply pipe through a first conversion part. One end of the outlet pipe extending to the outside of the inner tank is connected to an intermediate pipe or a water supply pipe through a second conversion part. The instant heating module is installed on the inner tank and includes an outer shell and a heating element disposed within the outer shell; wherein a heating pipe section is formed on the water inlet pipe and the heating pipe section is disposed within the outer shell.

[0006] Compared with the prior art, the advantages and positive effects of this utility model are: The electric water heater involved in this application is equipped with an instant heating module. The instant heating module is installed on the inner tank and includes an outer shell and a heating element. The heating pipe section on the inlet pipe is wrapped around the outer periphery of the heating element. During the heating process, the water in the outlet inner cavity enters the inlet pipe, is heated by the heating element when it passes through the heating pipe section, and then flows back to the heating inner cavity through the intermediate pipe and the outlet pipe. The electric water heater involved in this application heats the water in the instant heating module. The purpose of heating the water is achieved through heat exchange between the heating element and the water in the heating tube section. This can avoid the formation of scale in the inner tank, improve water quality, and help protect the heating element and the inner tank. In addition, the instant heating module is directly installed on the inner tank. The residual heat generated during the heating process of the instant heating module can be absorbed by the water in the inner tank, improving the heat utilization rate and the heating effect.

[0007] In some embodiments of this application, a heating cavity is formed within the outer casing, the heating element is disposed within the heating cavity, and the heating tube segment is arranged around the outer periphery of the heating element.

[0008] The heating tube section is wrapped around the outer periphery of the heating element, which facilitates full contact with the heating element and improves the heating effect.

[0009] In some embodiments of this application, a heat-conducting element is further provided between the heating element and the heating tube segment, and the heat-conducting element is configured to conduct the heat generated by the heating element to the heating tube segment.

[0010] In some embodiments of this application, the inner liner is arranged horizontally, the water outlet pipe is located at the upper position of the water storage cavity, a first inlet / outlet pipe section is formed on the water inlet pipe, the first inlet / outlet pipe section is located at the lower position of the water storage cavity, and a plurality of first inlet / outlet holes are provided at intervals on the first inlet / outlet pipe section.

[0011] During the heating process, the water at the bottom of the water storage cavity is transported to the heating pipe section through the inlet pipe for heating. The heated water is then transported back to the water storage cavity through the outlet pipe. The low-temperature water in the water storage cavity is located at the bottom, while the heated water is located at the top of the water storage cavity, which is conducive to the heating and circulation of the water in the water storage cavity.

[0012] In some embodiments of this application, a water pump is provided on the intermediate pipeline, and the water pump is configured to input water from the water storage cavity into the water inlet pipeline, and then return the water to the water storage cavity via the intermediate pipeline and the water outlet pipeline.

[0013] The water pump provides power for the water heating and circulation. Driven by the water pump, the water in the water storage cavity completes the heating and circulation through the inlet pipe, intermediate pipe and outlet pipe.

[0014] In some embodiments of this application, the inner tank is provided with an installation port, and the instant heating module is detachably connected to the water storage cavity from the installation port.

[0015] The heating module is connected to the inner tank through the installation port, which helps to reduce the overall size of the electric water heater.

[0016] In some embodiments of this application, a connecting flange is fixed to the outside of the mounting port, and a connecting outer edge is provided at the first end of the outer casing, the connecting outer edge being detachably connected to the connecting flange.

[0017] The connection between the outer edge and the connecting flange can be fixed by fasteners or by snap-fit.

[0018] In some embodiments of this application, a snap-fit ​​part is detachably connected to the outer edge of the connection, and a snap-fit ​​part is provided at the corresponding position of the connection flange. The snap-fit ​​part and the snap-fit ​​part are snapped together to realize the detachable connection between the outer shell and the connection flange.

[0019] The outer edge of the connection and the connecting flange are detachably connected by a snap-fit ​​mechanism, which helps to reduce the use of fasteners and improve assembly efficiency.

[0020] In some embodiments of this application, the latching portions are spaced apart along the circumferential direction of the housing on the connecting outer edge. The latching portion includes a plug-in slot segment and a latching slot segment, each of the latching slot segments being located on the same side of the corresponding plug-in slot segment. The latching portion is configured to connect from the corresponding plug-in slot segment to the other side of the connecting outer edge, and rotate with the housing to connect with the latching slot segment.

[0021] In some embodiments of this application, a gasket is further provided between the connecting outer edge and the connecting flange. A connecting hole is formed on the connecting outer edge, and a mating hole corresponding to each of the connecting holes is formed on the gasket. Each of the snap-fit ​​portions is detachably connected to the corresponding connecting hole and mating hole. A sealing portion is also formed on the gasket, and the sealing portion is sleeved on the outer wall of the outer shell and connected between the outer shell and the mounting port.

[0022] Gaskets are used to improve the tightness of the connection between the outer edge of the connection and the connecting flange. The sealing part on the gasket is used to seal the gap between the housing and the mounting port.

[0023] In some embodiments of this application, a positioning sleeve is connected to the connecting hole and the mating hole, and the snap-fit ​​part includes a bolt part and a nut part. One end of the bolt part forms a snap-fit ​​end, and the other end passes through the corresponding positioning sleeve and is connected and fixed to the nut.

[0024] The positioning sleeve plays a role in pre-positioning the connecting outer edge, the washer, and the connecting flange. The bolt and nut parts are connected and fixed to the connecting outer edge and the washer, and at the same time, the snap-on end on the bolt part is connected and fixed, realizing the connection of the snap-on part.

[0025] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a diagram of the internal structure of the electric water heater proposed in this utility model; Figure 2 This is a structural diagram of the inner tank of the electric water heater proposed in this utility model; Figure 3 This is a schematic diagram of the water flow during the heating stage of the electric water heater proposed in this utility model; Figure 4 This is a schematic diagram of the water flow during the water usage phase of the electric water heater proposed in this utility model; Figure 5 This is a diagram showing the connection between the inlet and outlet water pipe assembly and the instant heating module; Figure 6 This is a structural diagram of the instant heating module; Figure 7 This is a breakdown diagram of the instant heating module and the water inlet pipe; Figure 8 This is a diagram showing the snap-fit ​​part and the outer shell separated. Figure 9 This is a structural diagram of the connecting flange; Figure 10 This is a structural diagram of a washer component; In the picture, 100. Inner liner; 110. Connecting flange; 111. Support outer edge; 112. Snap-fit ​​part; 1121. Insertion groove section; 1122. Snap-fit ​​groove section; 113. Assembly port; 120. Washer; 121. Butt hole; 122. Sealing part; 210. Inlet pipe; 211. Heating pipe section; 212. First inlet / outlet pipe section; 213. First inlet / outlet hole; 220. Outlet pipe; 221. Second inlet / outlet pipe section; 222. Second inlet / outlet hole; 230. Intermediate pipe; 231. Water pump components; 240. Water supply pipe; 250. Water usage pipe; 300, Instantaneous heating module; 310, Outer shell; 311, Connecting outer edge; 312, Heating cavity; 313, Connecting hole; 320, Heating element; 330, Heat-conducting element; 410. First conversion unit; 420. Second conversion unit; 500, Buckle part; 510, Bolt part; 511, Buckle end; 520, Nut part; 530, Positioning sleeve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] 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 connection; 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; and they can refer to the internal connection of 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.

[0031] 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" 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.

[0032] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. 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 the invention. 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. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0033] An electric water heater is a type of water heater that uses electricity as its primary energy source. The high-temperature heat generated after the power is turned on directly heats the water stored in the water heater to produce hot water.

[0034] Electric water heaters typically consist of a water tank, an electric heating element, and an electronic control board. The water tank has a storage cavity to store water to be heated. The electric heating element is inserted into the storage cavity of the water tank. The electronic control board is used to control the electric heating element to operate by turning the power on and off, so that the water in the tank is heated to the set temperature.

[0035] For the water tank of an electric water heater, the tank generally consists of an outer shell and an inner tank, with an insulation layer between them. The outer shell is usually made of plastic to meet the requirements of aesthetic and diverse designs; the inner tank can be made of metal or plastic, depending on the needs.

[0036] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as asbestos, sponge, foam plastic, and polyurethane foam. In conventional technology, foaming is usually used to form the insulation layer in order to achieve good insulation effect.

[0037] For water tanks with metal inner liner, corrosion can easily occur inside due to water quality. Therefore, magnesium rods are installed on the water tank and inserted into the water storage cavity inside the tank.

[0038] Magnesium has the lowest electrochemical potential among metals and is physiologically non-toxic. Therefore, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod directly affects the duration and effectiveness of the protection; the larger the magnesium rod, the better the protection and the longer the protection time.

[0039] The water tank is also equipped with an inlet pipe and an outlet pipe. The inlet pipe is used to deliver cold water into the water storage cavity formed inside the water tank, while the hot water in the water storage cavity is output from the outlet pipe.

[0040] For electric heating components, electric heating methods such as electric heating wires, magnetic energy, or silicon tube heating can be used to heat the water stored in the water storage chamber.

[0041] The control board is used to receive detection signals from relevant sensors (such as water temperature sensors and flow sensors) and control the power supply to and from the electric heating components.

[0042] When the electric water heater is working, the electric control board controls the electric heating element to be powered on and heated. When the water temperature in the tank reaches the set value, the electric control board controls the electric heating element to be powered off.

[0043] refer to Figure 1 , Figure 2 This utility model proposes an electric water heater, which includes an outer shell 310, an inner tank 100, an inlet and outlet water pipe assembly, and an instant heating module 300.

[0044] An installation cavity is formed inside the outer shell 310, and the inner liner 100 is disposed in the installation cavity.

[0045] The inner liner 100 has a water storage cavity, and the water inlet and outlet pipe assembly includes an inlet pipe 210 and an outlet pipe 220, with one end of the inlet pipe 210 and the outlet pipe 220 extending into the water storage cavity.

[0046] The other end of the inlet pipe 210 extending to the outside of the inner tank 100 is connected to the intermediate pipe 230 or the water supply pipe 240 via the first conversion part 410. The other end of the outlet pipe 220 extending to the outside of the inner tank 100 is connected to the intermediate pipe 230 or the water supply pipe 250 via the second conversion part 420.

[0047] Specifically, when the electric water heater is in the heating stage, the inlet pipe 210 is connected to the intermediate pipe 230 through the first conversion part 410, and the outlet pipe 220 is connected to the intermediate pipe 230 through the second conversion part 420.

[0048] At this time, the inlet pipe 210 and the supply pipe 240 are disconnected, and the outlet pipe 220 and the water supply pipe 250 are disconnected.

[0049] In other words, the inlet pipe 210 is connected to the outlet pipe 220 through the intermediate pipe 230.

[0050] The instant heating module 300 is installed on the inner liner 100. The instant heating module 300 includes an outer shell 310 and a heating element 320 disposed inside the outer shell 310.

[0051] A heating pipe section 211 is formed on the water inlet pipe 210. The heating pipe section 211 is set in the heating inner cavity formed by the outer shell 310 and is used to absorb the heat generated by the heating element 320 to heat the water in the heating pipe section 211.

[0052] In some embodiments, the heating tube segment 211 and the heating element 320 are arranged in parallel, that is, the heating tube segment 211 runs straight through the interior of the outer casing 310.

[0053] In other embodiments, the heating tube segment 211 is designed to run straight through the interior of the outer casing 310, and the heating element 320 is spirally arranged around the periphery of the heating tube segment 211 to heat the heating tube segment 211.

[0054] Alternatively, the heating tube section 211 and the heating element 320 can be designed to be spirally wound around each other and connected inside the outer casing 310.

[0055] In other embodiments, the heating element 320 is disposed inside the outer casing 310, and the heating tube segment 211 is spirally wound around the outer periphery of the heating element 320. This arrangement of the heating tube segment 211 and the heating element 320 facilitates processing, makes full use of the heat generated by the heating element 320, reduces the heat dissipation of the heating element 320 to the periphery, and helps to improve the heat utilization rate.

[0056] During the heating stage, the heating element 320 is turned on, and the heat generated after the heating element 320 is powered on is transferred to the heating pipe section 211, which heats the water passing through the heating pipe section 211.

[0057] A water pump 231 is provided on the intermediate pipe 230. The water pump 231 is configured to input water in the water storage cavity into the water inlet pipe 210, and then return it to the water storage cavity through the intermediate pipe 230 and the water outlet pipe 220.

[0058] In other words, during the heating stage, the water pump 231 is turned on, providing power to the water in the water storage cavity, so that it is input through the inlet pipe 210, heated by the heat generated by the heating element 320 when it passes through the heating pipe section 211, and then flows back to the water storage cavity through the intermediate pipe 230 and the outlet pipe 220. This cycle continues, heating the water in the water storage cavity to the target state.

[0059] The water pump 231 provides power for the water heating and circulation. Driven by the water pump 231, the water in the water storage cavity completes the heating and circulation through the inlet pipe 210, the intermediate pipe 230 and the outlet pipe 220.

[0060] The electric water heater involved in this application is equipped with an instant heating module 300, which is installed on the inner tank 100. During the heating process, the water in the outlet inner cavity enters the inlet pipe 210, and is heated by the heating element 320 when it passes through the heating pipe section 211. After that, it flows back to the heating inner cavity through the intermediate pipe 230 and the outlet pipe 220. The water is heated in the instant heating module 300. The purpose of heating the water is achieved through the heat exchange between the heating element 320 and the heating pipe section 211. This can prevent the formation of scale in the inner tank 100, improve water quality, and also help protect the heating element 320 and the inner tank 100.

[0061] Combination Figures 5-7 In some embodiments of this application, the outer shell 310 is a cylindrical structure with one end open, and the water inlet pipe 210 extends through the bottom of the outer shell 310 into the water storage cavity.

[0062] A heating cavity 312 is formed inside the outer casing 310. A heating element 320 is disposed inside the heating cavity 312. The other end of the heating element 320 extends to the outside of the heating cavity 312 and is connected to a wiring harness. A power supply component supplies power to the heating element 320 through the wiring harness so that the heating element 320 heats up.

[0063] The heating tube section 211 is spirally wound around the periphery of the heating element 320 to increase the heat exchange area between it and the heating element 320.

[0064] A heat-conducting element 330 is also provided between the heating element 320 and the heating tube section 211. The heat-conducting element 330 is configured to conduct the heat generated by the heating element 320 to the heating tube section 211.

[0065] Specifically, the heat-conducting component 330 is connected to the heating component 320 and the heating tube section 211 as a whole by casting aluminum.

[0066] After the heating element 320 and heating tube section 211 are connected in the heating chamber 312, molten aluminum is poured into the heating chamber 312. The main advantages of aluminum include its lightweight, good electrical and thermal conductivity, and recyclability.

[0067] The heat-conducting element 330 transfers the heat generated by the heating element 320 to the heating tube section 211 to heat the water flowing through the heating tube section 211.

[0068] The heating element 320 and the heating tube section 211 are made of high-temperature resistant materials to avoid damage from molten aluminum.

[0069] Since the heat-conducting component 330 is made of metal, it will generate residual heat. Therefore, the instant heating module 300 is placed in the water storage cavity of the inner tank 100, and the outer shell 310 is in contact with the water in the water storage cavity. The overflowing residual heat temperature is transferred to the water, making full use of preheating to heat the water in the water storage cavity and improving heat utilization.

[0070] In some embodiments of this application, the inner tank 100 is arranged horizontally, the water outlet pipe 220 is located at the upper position of the water storage cavity, and a second water inlet / outlet pipe section extending towards the top of the water storage cavity is formed on the water outlet pipe 220. A second water inlet / outlet hole 222 is formed at the top of the second water inlet / outlet pipe section 221, which is used to output heated water into the water storage cavity during the heating stage, or to output hot water from the water storage cavity during the water use stage.

[0071] A first inlet / outlet pipe section 212 is formed on the water inlet pipe 210. The first inlet / outlet pipe section 212 is located at a lower position in the water storage cavity. Multiple first inlet / outlet holes 213 are provided on the first inlet / outlet pipe section 212 at intervals.

[0072] refer to Figure 3 During the heating stage, the first conversion unit 410, the second conversion unit 420, the water inlet pipe 210, the intermediate pipe 230, and the water outlet pipe 220 are connected.

[0073] When the water pump 231 is turned on and the heating element 320 is powered on, water from the bottom of the water storage chamber is input into the water inlet pipe 210 through the first water inlet / outlet hole 213. The water is then transported to the heating pipe section 211 for heating. The heat generated by the heating element 320 is transferred to the heating pipe section 211 through the heat conduction part, thus heating the water in the heating pipe section 211.

[0074] After being heated, the water is transported through the intermediate pipe 230 to the water storage pipe, and then returned to the water storage cavity through the second inlet / outlet hole 222 of the outlet pipe 220.

[0075] The low-temperature water in the water storage cavity is located at the bottom, while the heated water is located at the top of the water storage cavity, which is conducive to the heating and circulation of the water in the water storage cavity.

[0076] A temperature detection device is installed in the water storage cavity. After the water in the water storage cavity is heated to the preset temperature, the heating element 320 is de-energized and heating stops.

[0077] refer to Figure 4 During the water usage phase, the first conversion unit 410 connects the inlet pipe 210 and the supply pipe 240, and the second conversion unit 420 connects the outlet pipe 220 and the water usage pipe 250. The supply pipe 240 replenishes low-temperature water into the water storage cavity through the inlet pipe 210 as needed. The high-temperature water in the water storage cavity is input from the second inlet / outlet hole 222 to the outlet pipe 220, and then output to the water terminal through the water usage pipe 250 for user use.

[0078] In some embodiments of this application, the inner liner 100 has an installation port, from which the heating module 300 is detachably connected to the water storage cavity.

[0079] The heating module is connected to the inner tank 100 through the installation port, which helps to reduce the overall size of the electric water heater.

[0080] In some embodiments of this application, a connecting flange 110 is fixed outside the mounting port, and a connecting outer edge 311 is provided at the first end of the outer casing 310. The connecting outer edge 311 is detachably connected to the connecting flange 110.

[0081] The connection between the outer edge 311 and the connecting flange 110 can be fixed by fasteners or by snap-fit.

[0082] Specifically, the connecting flange 110 is provided with a supporting outer edge 111, which is fixedly connected to the outer wall of the inner liner 100. Under the action of the supporting outer edge 111, a snap-fit ​​space is formed between the connecting flange 110 and the outer wall of the inner liner 100.

[0083] The connecting flange 110 is also provided with an assembly port 113 in the middle position, which communicates with the installation port. The outer shell 310 extends into the water storage cavity of the inner tank 100 through the assembly port 113 and the installation port.

[0084] In the installed state, the outer shell 310 extends into the inner liner 100, and the connecting outer edge 311 on the opening side of the outer shell 310 is detachably connected to the connecting flange 110.

[0085] In some embodiments of this application, a snap-fit ​​part 500 is detachably connected to the outer edge 311, and a snap-fit ​​part 112 is provided at the corresponding position of the connecting flange 110. The snap-fit ​​part 500 and the snap-fit ​​part 112 are snapped together to realize the detachable connection between the outer shell 310 and the connecting flange 110.

[0086] The outer edge 311 and the connecting flange 110 are detachably connected by a snap-fit ​​mechanism, which helps to reduce the use of fasteners and improve assembly efficiency.

[0087] In some embodiments of this application, in order to improve the stability of the connection, the latch portion 500 is provided with a plurality of latches at circumferential intervals along the outer edge 311 of the connection.

[0088] refer to Figure 9 The position and number of the snap-fit ​​parts 112 correspond one-to-one with the snap-fit ​​parts 500. Each snap-fit ​​part 112 includes a insertion slot section 1121 and a snap-fit ​​slot section 1122. Each snap-fit ​​slot section 1122 is located on the same side of the corresponding insertion slot section 1121. In other words, along one rotation direction of the outer shell 310, the snap-fit ​​slot sections 1122 on each snap-fit ​​part 112 are located on the same side of the insertion slot section 1121, so that each snap-fit ​​part 500 is simultaneously snapped into the snap-fit ​​slot section 1122.

[0089] Specifically, the latching part 500 is configured to connect from the corresponding insertion slot section 1121 to the other side of the connecting outer edge 311, and rotate with the housing 310 to connect with the latching slot section 1122.

[0090] That is, when the snap-fit ​​part 500 and the slot part are installed, the snap-fit ​​part 500 is connected from the insertion slot section 1121 to the snap-fit ​​space between the connecting flange 110 and the inner liner 100. Then, the outer shell 310 is rotated so that the snap-fit ​​part 500 is rotatably connected to the snap-fit ​​slot section 1122, thereby realizing the connection and fixation between the snap-fit ​​part 500 and the connecting flange 110.

[0091] refer to Figure 8 , Figure 10 In some embodiments of this application, a gasket 120 is provided between the connecting outer edge 311 and the connecting flange 110, and the gasket 120 is made of rubber.

[0092] A connecting hole 313 is formed on the outer edge 311, and a mating hole 121 corresponding to each connecting hole 313 is formed on the washer 120. Each snap-fit ​​part 500 is detachably connected to the corresponding connecting hole 313 and mating hole 121.

[0093] A sealing portion 122 is also formed on the gasket 120. The sealing portion 122 is fitted onto the outer wall of the housing 310 and connects the housing 310 and the mounting port.

[0094] The gasket 120 is used to improve the tightness of the connection between the outer edge 311 and the connecting flange 110, and the sealing part 122 on the gasket 120 is used to seal the gap between the housing 310 and the mounting port.

[0095] In some embodiments of this application, a positioning sleeve 530 is connected to the connecting hole 313 and the mating hole 121. The snap-fit ​​part 500 includes a bolt part 510 and a nut part 520. One end of the bolt part 510 forms a snap-fit ​​end 511, and the other end passes through the corresponding positioning sleeve 530 and is connected and fixed to the nut.

[0096] The positioning sleeve 530 plays a role in pre-positioning the connecting outer edge 311, the washer 120 and the connecting flange 110. The bolt part 510 and the nut part 520 are connected and fixed to the connecting outer edge 311 and the washer 120, and at the same time, the snap-on end 511 on the bolt part 510 is connected and fixed, realizing the connection of the snap-on part 500.

[0097] When installing the buckle part 500, first connect the threaded end of the bolt part 510 to the outside of the connecting outer edge 311 through the mating hole 121 and the connecting hole 313 in sequence, and then fix the bolt part 510 to the connecting outer edge 311 through the nut part 520.

[0098] When the snap-fit ​​part 500 is connected and fixed, the gasket 120 is also fixed to the side of the outer edge 311 of the housing 310 near the connecting flange 110. During installation, the sealing part 122 of the gasket 120 is connected to the installation port along with the housing 310 to achieve a sealing effect.

[0099] When the water in the inner tank 100 is heated, the water pump 231 starts to work. The first conversion unit 410 and the second conversion unit 420 form a circulation between the water inlet pipe 210, the intermediate pipe 230 and the water outlet pipe 220, and the water in the water storage cavity begins to circulate. Each time the water flows through the heating pipe section 211, it will heat up the water inside. After several cycles, the water temperature in the water storage cavity can reach the set temperature.

[0100] When water is used, the first conversion unit 410 and the second conversion unit 420 connect the inlet pipe 210 and the supply pipe 240, and connect the outlet pipe 220 and the water supply pipe 250, respectively, so that hot water can flow out from the outlet pipe 220 and cold water can be added to the inlet pipe 210.

[0101] The electric water heater involved in this application is equipped with an independently set instant heating module 300. The water is heated by the heating element 320 in the heating pipe section 211, making full use of the heat generated by the instant heating module 300. This helps to reduce scale in the water in the inner tank 100, keeping the water in the inner tank 100 clean. In addition, the residual heat generated by the instant heating module 300 can further heat the water in the water storage cavity, resulting in high heat utilization.

[0102] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

[0103] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0104] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

Claims

1. An electric water heater, characterized in that, include: The outer casing has an internal mounting cavity formed therein; An inner liner is disposed in the mounting cavity, and a water storage cavity is formed within the inner liner. The water inlet and outlet pipe assembly includes an inlet pipe and an outlet pipe extending into the water storage cavity. One end of the inlet pipe extending to the outside of the inner tank is connected to an intermediate pipe or a water supply pipe through a first conversion part. One end of the outlet pipe extending to the outside of the inner tank is connected to an intermediate pipe or a water supply pipe through a second conversion part. The instant heating module is installed on the inner tank and includes an outer shell and a heating element disposed within the outer shell; wherein a heating pipe section is formed on the water inlet pipe and the heating pipe section is disposed within the outer shell.

2. The electric water heater according to claim 1, characterized in that, A heating cavity is formed within the outer shell, the heating element is disposed within the heating cavity, and the heating tube segment is arranged around the outer periphery of the heating element.

3. The electric water heater according to claim 1, characterized in that, A heat-conducting element is also provided between the heating element and the heating tube segment, and the heat-conducting element is configured to conduct the heat generated by the heating element to the heating tube segment.

4. The electric water heater according to claim 1, characterized in that, The inner liner is arranged horizontally, the water outlet pipe is located at the upper part of the water storage cavity, the water inlet pipe has a first water inlet / outlet pipe section, the first water inlet / outlet pipe section is located at the lower part of the water storage cavity, and a plurality of first water inlet / outlet holes are provided at intervals on the first water inlet / outlet pipe section.

5. The electric water heater according to claim 1, characterized in that, A water pump is installed on the intermediate pipeline. The water pump is configured to input water from the water storage cavity into the inlet pipeline, and then return the water to the water storage cavity via the intermediate pipeline and the outlet pipeline.

6. The electric water heater according to claim 1, characterized in that, The inner liner has an installation port, and a connecting flange is fixed to the outside of the installation port. The first end of the outer shell has a connecting outer edge, which is detachably connected to the connecting flange.

7. The electric water heater according to claim 6, characterized in that, A snap-fit ​​part is detachably connected to the outer edge of the connection, and a snap-fit ​​part is provided at the corresponding position of the connection flange. The snap-fit ​​part and the snap-fit ​​part snap together to realize the detachable connection between the outer shell and the connection flange.

8. The electric water heater according to claim 7, characterized in that, The latching portions are spaced apart along the circumference of the outer shell on the connecting outer edge. The latching portion includes a plug-in slot segment and a latching slot segment. Each latching slot segment is located on the same side of the corresponding plug-in slot segment. The latching portion is configured to connect from the corresponding plug-in slot segment to the other side of the connecting outer edge, and rotates with the outer shell to connect with the latching slot segment.

9. The electric water heater according to claim 8, characterized in that, A gasket is provided between the outer edge of the connection and the connecting flange. A connection hole is formed on the outer edge of the connection, and a mating hole is formed on the gasket that corresponds to each of the connection holes. Each of the snap-fit ​​parts is detachably connected to the corresponding connection hole and mating hole. A sealing part is also formed on the gasket, and the sealing part is sleeved on the outer wall of the outer shell and connected between the outer shell and the mounting port.

10. The electric water heater according to claim 9, characterized in that, The connecting hole and the mating hole are connected to a positioning sleeve. The snap-fit ​​part includes a bolt part and a nut part. One end of the bolt part forms a snap-fit ​​end, and the other end passes through the corresponding positioning sleeve and is connected and fixed to the nut.

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