Water inlet pipe assembly and electric water heater

Abstract

The utility model discloses a water inlet pipe assembly and electric water heater, water inlet pipe assembly includes water inlet pipe and cover body, water inlet pipe has opposite first end and second end, and the first end is water inlet, and the second end is closed, and the periphery wall of water inlet pipe is provided with a plurality of water outlet holes, the cover body is covered in the periphery of water inlet pipe, and a plurality of water outlet holes are located in the cover body, and the cover body and water inlet pipe form the water outlet gap that surrounds water inlet pipe between, and one end of water outlet gap is closed, and the other end is open, this scheme can improve the circumferential uniformity of the water flow of water inlet pipe, improve hot water output efficiency, reduce the impact of water flow to the inner bag.

Description

Technical Field

[0001] This utility model belongs to the field of household appliance technology, and in particular relates to a water inlet pipe assembly and an electric water heater. Background Technology

[0002] In related technologies, electric water heaters deliver water to the inner tank via an insulated inlet pipe. The outlet of the inlet pipe is either perforated on all four sides or open at one end to deliver water to the inner tank. This method of water delivery suffers from uneven circumferential flow, affecting water delivery efficiency; furthermore, uneven water delivery can lead to excessive local flow, which can impact the inner tank and shorten its lifespan. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a water inlet pipe assembly and an electric water heater, which improves the circumferential uniformity of the water flow from the water inlet pipe, increases the hot water output efficiency, and reduces the impact of the water flow on the inner tank.

[0004] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In some embodiments of this application, a water inlet pipe assembly is provided, comprising a water inlet pipe and a cover. The water inlet pipe has a first end and a second end opposite to each other, the first end being a water inlet and the second end being closed. Multiple water outlet holes are provided on the peripheral wall of the water inlet pipe. The cover is fitted around the outer periphery of the water inlet pipe, with the multiple water outlet holes located inside the cover. A water outlet gap is formed between the cover and the water inlet pipe, surrounding the water inlet pipe, with one end of the water outlet gap closed and the other end open. This solution can improve the circumferential uniformity of the water flow from the water inlet pipe and reduce the impact on the inner liner.

[0005] Compared with the prior art, the advantages and positive effects of this utility model are: This design significantly improves the circumferential uniformity of the water flow, thereby increasing water delivery efficiency. Specifically, multiple outlet holes of the inlet pipe are located inside the casing. Water first enters the outlet gap between the casing and the inlet pipe through these outlet holes. Because the outlet gap surrounds the inlet pipe, the water flow can achieve circumferential flow and pressure balance within the gap. The dispersed water flows from different outlet holes initially merge and buffer each other within the gap, ultimately forming a uniformly distributed overall water flow from the open end. This design effectively eliminates the circumferential unevenness caused by differences in water flow intensity at individual outlet holes, making the flow rate of water entering the inner tank more consistent throughout the circumference. This improves overall water delivery efficiency and avoids poor water circulation within the inner tank due to insufficient or excessive local water flow. This design significantly reduces the impact on the inner tank, extending its service life. Specifically, the solution achieves "secondary flow guidance" of water through the cooperation between the cover and the outlet gap: the water first enters the gap through the outlet hole, where it undergoes energy buffering and direction adjustment. By the time it flows out from the open end, the impact force of the water flow has been dispersed and weakened by the flow within the gap. Simultaneously, the uniform circumferential water flow avoids localized high-intensity impacts, ensuring that the force on the inner tank wall is evenly distributed circumferentially, significantly reducing the impact force per unit area. This design fundamentally solves the problem of inner tank damage caused by water flow impact, effectively extending the service life of the inner tank and reducing the maintenance cost and failure rate of the electric water heater. The structure is simple, reliable, and highly adaptable. Specifically, the inlet pipe assembly achieves the aforementioned technical effects simply by adding a cover to the outside of the inlet pipe, without requiring complex power units or control components. The structure is simple, compact, and easy to manufacture and assemble. The fit between the cover and the inlet pipe is stable and can adapt to changes in water flow under different water pressure conditions, making it less prone to failure during long-term use. Furthermore, this structure can be directly applied to the inner tank design of existing electric water heaters without requiring large-scale modifications, exhibiting strong versatility and adaptability, facilitating industrial-scale promotion and application. The water inlet pipe assembly of this application includes an inlet pipe and a cover. The inlet pipe has multiple outlet holes, and the cover is fitted over the outside of the inlet pipe, forming an outlet gap between the cover and the inlet pipe. The outlet gap surrounds the inlet pipe. When the water inlet pipe assembly supplies water to the inner tank, the water in the inlet pipe flows through the outlet holes into the outlet gap, then flows along the outlet gap, and finally flows into the inner tank through the open end of the outlet gap. Because the outlet gap surrounds the inlet pipe, and one end of the outlet gap is closed while the other end is open, the cover straightens and buffers the water flow as it flows towards the open end within the outlet gap. This regulates the uniformity of the circumferential flow distribution while also providing a buffering effect, reducing the impact on the inner tank.

[0006] In some embodiments of this application, the plurality of water outlet holes are close to the second end of the water inlet pipe, and the opening of the water outlet gap is far from the second end of the water inlet pipe.

[0007] In some embodiments of this application, the water outlet gap increases from the second end of the water inlet pipe toward the first end.

[0008] In some embodiments of this application, a fastener is provided at the second end of the cover, and the fastener fixes the second end of the cover to the second end of the water inlet pipe.

[0009] In some embodiments of this application, the second end of the water inlet pipe is provided with an annular groove, and the fastener is engaged in the annular groove.

[0010] In some embodiments of this application, the cover is made of a non-metallic material.

[0011] In some embodiments of this application, a reinforcing member is provided at the first end of the cover, and the reinforcing member is arranged around the first end of the cover.

[0012] In some embodiments of this application, the water outlet gap is filled with scale inhibitor material and / or filter material.

[0013] In some embodiments of this application, the water inlet pipe assembly further includes: An installation pipe is provided, wherein a water inlet channel is formed inside the installation pipe, and the first end of the water inlet pipe is connected to the installation pipe and the water inlet pipe is connected to the water inlet channel. The water flow sensor includes a magnetic rotor assembly and a Hall effect sensor. The magnetic rotor assembly is disposed in the water inlet channel, and the Hall effect sensor is disposed on the mounting pipe.

[0014] In some embodiments of this application, a sleeve is provided in the water inlet channel, and the first end of the water inlet pipe is inserted into the sleeve.

[0015] In some embodiments of this application, an electric water heater is provided, including a housing, an inner tank disposed inside the housing, and a water inlet pipe assembly as described above, wherein the water inlet pipe is located in the inner tank. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a structural diagram of an electric water heater according to some embodiments; Figure 2 This is a structural diagram of an inlet pipe assembly according to some embodiments; Figure 3 This is a cross-sectional view of an inlet pipe assembly according to some embodiments; Figure 4 This is a structural diagram of an inlet pipe and a cover according to some embodiments; Figure 5 An exploded view of a magnetic rotor assembly according to some embodiments.

[0018] Explanation of reference numerals in the attached figures: 1. Outer casing; 2. Inlet water pipe assembly; 3. Outlet water pipe; 100. Water inlet pipe; 111. First end; 112. Second end; 120. Water outlet; 130. Annular groove; 200. Cover body; 210. Fastener; 220. Reinforcing member; 230. Water outlet gap; 231. Opening; 300. Installation pipe; 310. Water inlet channel; 311. Step; 320. Sleeve fitting; 330. Gasket; 400. Water flow sensor; 410. Magnetic rotor assembly; 411. First housing; 412. Second housing; 413. Magnetic rotor; 420. Hall effect sensor; 421. Screw. Detailed Implementation

[0019] 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.

[0020] 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 used 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.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] In related technologies, electric water heaters deliver water to the inner tank via an insulated inlet pipe. The outlet of the inlet pipe is either perforated on all four sides or open at one end to deliver water to the inner tank. This method of water delivery suffers from uneven circumferential flow, affecting water delivery efficiency; furthermore, uneven water delivery can lead to excessive local flow, which can impact the inner tank and shorten its lifespan.

[0035] To address this technical problem, some embodiments of this application provide an electric water heater. Figure 1 This is a structural diagram of an electric water heater. The water heater includes a shell 1, an inner tank inside the shell 1, an inlet pipe assembly 2, and an outlet pipe 3. The inlet pipe assembly 2 supplies cold water to the inner tank. Water in the inner tank flows out through the outlet pipe 3. Figure 2 This is a structural diagram of water inlet pipe assembly 2. Figure 3 This is a cross-sectional view of the water inlet pipe assembly 2.

[0036] The water inlet pipe assembly 2 includes a water inlet pipe 100. The water inlet pipe 100 extends into the inner liner. The water inlet pipe 100 has a first end 111 and a second end 112 opposite to each other. The first end 111 is the water inlet, and the second end 112 is closed. A plurality of water outlet holes 120 are provided on the peripheral wall of the water inlet pipe 100. Water in the water inlet pipe 100 flows out through the water outlet holes 120.

[0037] The water inlet pipe assembly 2 also includes a cover 200. Figure 4This is a structural diagram of an inlet pipe 100 and a cover 200. The cover 200 is fitted around the outer periphery of the inlet pipe 100, and the plurality of water outlet holes 120 are located inside the cover 200. A water outlet gap 230 is formed between the cover 200 and the inlet pipe 100, surrounding the inlet pipe 100. One end of the water outlet gap 230 is closed, and the other end is open 231.

[0038] Water in the inlet pipe 100 flows into the outlet gap 230 through multiple outlet holes 120. When the water flows from the outlet gap 230 to the open side 231, the cover 200 plays a role in rectifying and equalizing the water flow, thereby improving the circumferential uniformity of the water flow and reducing the impact on the inner liner.

[0039] The water inlet pipe assembly 2 of this application includes a water inlet pipe 100 and a cover 200. The water inlet pipe 100 is provided with multiple water outlet holes 120, and one end of the water inlet pipe 100 is a water inlet, while the other end is a closed end. The cover 200 is sleeved on the outside of the water inlet pipe 100, and a water outlet gap 230 is formed between the cover 200 and the water inlet pipe 100. The water outlet gap 230 surrounds the water inlet pipe 100, with one end closed and the other end open. When the water inlet pipe assembly 2 supplies water to the inner tank, the water in the water inlet pipe 100 flows into the water outlet gap 230 through the water outlet holes 120, then flows along the water outlet gap 230, and flows into the inner tank from the opening 231 of the water outlet gap 230.

[0040] Because the second end 112 of the inlet pipe 100 is closed, the water in the inlet pipe 100 can only flow into the outlet gap 230 through the outlet hole 120, thus preventing the water in the inlet pipe 100 from flowing out directly from the end opening 231 of the inlet pipe 100 and impacting the inner tank.

[0041] Since the water outlet gap 230 surrounds the water inlet pipe 100, and one end of the water outlet gap 230 is closed while the other end is open, the cover 200 rectifies and buffers the water flow as it flows from the water outlet gap 230 to the open side 231. This regulates the uniformity of the circumferential flow distribution and also acts as a buffer, reducing the impact on the inner tank.

[0042] The inlet pipe 100 of this application can significantly improve the circumferential uniformity of the outflow and increase the water delivery efficiency. In related technologies, the inlet pipe directly exits water through openings in the circumferential wall or at the end, and the water flow is prone to local concentration due to uneven pressure distribution, resulting in significant differences in circumferential flow rate. In this solution, the multiple outlet holes 120 of the inlet pipe 100 are all located inside the cover 200. The water flow first enters the outlet gap 230 between the cover 200 and the inlet pipe 100 from the outlet holes 120. Since the outlet gap 230 is set around the inlet pipe 100, the water flow can undergo circumferential flow and pressure balance within the gap. The dispersed water flow that originally flowed from different outlet holes 120 merges and buffers each other within the gap, and finally forms a uniformly distributed overall water flow from the open end 231. This design effectively eliminates the circumferential unevenness caused by the difference in water flow intensity at a single outlet, making the flow rate of water entering the inner tank more consistent at all circumferential positions, thereby improving the overall water delivery efficiency and avoiding poor water circulation in the inner tank due to insufficient or excessive local water flow.

[0043] The inlet pipe 100 of this application significantly reduces the impact on the inner tank, extending its service life. In traditional structures, concentrated water flow directly impacts the inner wall of the tank, which can easily lead to localized wear, stress concentration, and even leaks over time. This solution achieves "secondary flow guidance" of the water flow through the cooperation of the cover 200 and the outlet gap 230: the water flow first enters the gap through the outlet hole 120, where it undergoes energy buffering and direction adjustment. By the time it flows out from the open end 231, the impact force of the water flow has been dispersed and weakened by the flow within the gap. Simultaneously, the uniform circumferential water flow avoids localized high-intensity impacts, ensuring that the force on the inner wall of the tank is evenly distributed circumferentially, significantly reducing the impact force per unit area. This design fundamentally solves the problem of inner tank damage caused by water flow impact, effectively extending the service life of the inner tank and reducing the maintenance cost and failure rate of the electric water heater.

[0044] The inlet pipe 100 of this application has a simple, reliable structure and strong adaptability. This inlet pipe assembly 2 achieves the aforementioned technical effects simply by adding a cover 200 to the outside of the inlet pipe 100, without requiring complex power devices or control components. Its simple and compact structure makes it easy to manufacture and assemble. The fit between the cover 200 and the inlet pipe 100 is stable and can adapt to changes in water flow under different water pressure conditions, making it less prone to failure during long-term use. Furthermore, this structure can be directly applied to the inner tank design of existing electric water heaters without requiring large-scale modifications, exhibiting strong versatility and adaptability, facilitating industrial-scale promotion and application.

[0045] In summary, this utility model, through the coordinated design of the water inlet pipe 100 and the cover 200, has a significant effect on improving the uniformity of water output and reducing the impact on the inner tank. At the same time, it has the characteristics of simple structure and high reliability, providing an effective technical solution for optimizing the performance of electric water heaters.

[0046] In some embodiments of this application, reference is made to Figure 3 Multiple water outlet holes 120 are close to the second end 112 of the water inlet pipe 100, and the opening 231 of the water outlet gap 230 is away from the second end 112 of the water inlet pipe 100.

[0047] Water in the inlet pipe 100 flows into the outlet gap 230 through the outlet hole 120. The flow direction of the water in the outlet gap 230 is opposite to that in the inlet pipe 100. There is a certain distance between the outlet hole 120 and the opening 231 of the outlet gap 230, which increases the flow time of the water in the outlet gap 230 and improves the rectification and flow equalization effect of the cover 200 on the water flow.

[0048] From the perspective of water flow path, when water flows in from the first end 111 (inlet) of the inlet pipe 100, it flows along the inside of the inlet pipe 100 towards the second end 112. Since the second end 112 is closed, the water will be discharged from multiple outlet holes 120 near the second end 112 under pressure and enter the outlet gap 230 between the cover 200 and the inlet pipe 100. At this time, the opening 231 of the outlet gap 230 is far away from the second end 112, so the water needs to undergo a flow process from the second end 112 to the opening 231 within the outlet gap 230.

[0049] This flow process firstly enhances the buffering and mixing effect of the water flow. When the water flows into the gap from the outlet 120, there may be local unevenness due to slight differences in the position of each outlet 120 and the water pressure. However, in the flow from the second end 112 to the open end 231, the water will fully collide and merge in the gap, which will further eliminate the possible local velocity differences, thereby greatly improving the circumferential uniformity of the water flowing out from the open end 231.

[0050] Secondly, it effectively guides the water flow direction, reducing impact on the bottom of the inner tank. In the inner tank of an electric water heater, the second end 112 of the inlet pipe 100 is usually close to the bottom of the inner tank. If the opening 231 of the outlet gap 230 is also close to the second end 112, the water flow may directly impact the bottom of the inner tank. In this embodiment, the opening 231 is far from the second end 112, so that when the water flows out from the opening 231, the direction is more biased towards the upper middle part of the inner tank, avoiding direct impact on the bottom. At the same time, the impact force of the water flow after being buffered by the gap is greatly reduced. Combined with the guidance of the flow direction, it can significantly reduce wear on the bottom and side walls of the inner tank, further extending the life of the inner tank.

[0051] In addition, this structure also promotes the uniformity of water temperature inside the inner tank. Since the water flows out from the open end 231 and is biased towards the upper middle part of the inner tank, it can mix with the water in the upper middle part of the inner tank first, and then gradually diffuse downwards. This avoids the sudden drop in local water temperature caused by cold water directly impacting the hot water area at the bottom, which is conducive to the overall balance of water temperature inside the inner tank and improves the comfort of users.

[0052] In some embodiments of this application, the water outlet gap 230 increases from the second end 112 of the water inlet pipe 100 toward the first end 111.

[0053] Specifically, the cover 200 is umbrella-shaped, and the umbrella-shaped cover 200 and the inlet pipe 100 form a gradually widening outlet gap 230, which reduces the obstruction to the water flow and improves the water delivery efficiency while ensuring the rectification and flow equalization effect.

[0054] From the perspective of the water flow process within the gap, when the water enters the outlet gap 230 from the outlet hole 120 near the second end 112, the initial entry area of ​​the gap is relatively small. At this time, the water flow forms a relatively concentrated flow state due to spatial constraints, and the flow velocity is maintained at a certain level, which helps to propel the water flow towards the first end 111. As it advances towards the first end 111, the outlet gap 230 gradually increases, and the water flow obtains more sufficient diffusion space, allowing the originally concentrated water flow to fully expand in both the circumferential and radial directions.

[0055] This gradient-changing gap structure firstly achieves a gradual balance of water flow pressure. When water is ejected from the outlet 120, it carries a certain pressure. In areas with smaller gaps, the pressure is relatively concentrated, driving the water flow to overcome flow resistance and move towards the open end 231. As the gap increases, the pressure is gradually released, avoiding turbulence caused by sudden pressure drops. Simultaneously, the uniform pressure release reduces turbulence within the gaps, minimizing velocity differences between regions and further improving the circumferential uniformity of the discharged water.

[0056] Secondly, this design enhances the mixing effect of water flow. In areas with smaller gaps, water streams from different outlets (120°) are prone to collision and merging due to their close proximity. As the gaps increase, the merged water streams can diffuse further over a wider area, effectively neutralizing any potential differences in temperature or flow rate. This is especially beneficial for electric water heaters, as it allows for more even mixing of cold water entering the tank with the hot water already inside, reducing localized temperature fluctuations and improving user comfort.

[0057] Furthermore, the structure with an increased gap gradient can also buffer the impact force of water flow. The flow velocity maintained at the smaller gap gradually decreases as the gap increases, and its kinetic energy is gradually converted through a gentle diffusion process, rather than being suddenly released at a fixed position. This further weakens the impact force of the water flowing out from the open end 231, and the force distribution is more uniform, thereby minimizing the impact wear on the inner liner wall and extending the service life of the inner liner.

[0058] Meanwhile, this structure offers better adaptability to different water pressure conditions. When the inlet pressure is high, the smaller initial gap can temporarily constrain the water flow, preventing the water from directly impacting the enclosure 200 due to excessive pressure. As the gap increases, it can promptly guide the high-pressure water flow, preventing pressure buildup within the gap. When the inlet pressure is low, the gradient gap can utilize the pressure concentration effect of the initial section to ensure smooth water flow towards the open end 231, guaranteeing that the water conveyance efficiency is not affected by low pressure. In some embodiments of this application, a fastener 210 is provided at the second end 112 of the cover 200, and the fastener 210 fixes the second end 112 of the cover 200 to the second end 112 of the water inlet pipe 100.

[0059] Specifically, the fastener 210 is a second clamp, which fixes the second end 112 of the cover 200 to the second end 112 of the water inlet pipe 100, and at the same time seals the second end 112 of the cover 200 and the second end 112 of the water inlet pipe 100 to prevent water in the water outlet gap 230 from flowing out from this end.

[0060] In some embodiments of this application, the second end 112 of the water inlet pipe 100 is provided with an annular groove 130, and the fastener 210 is engaged in the annular groove 130, that is, the second clamp is engaged in the annular groove 130.

[0061] By setting an annular groove 130 at the second end 112 of the water inlet pipe 100, and setting a corresponding bent edge at the second end 112 of the cover body 200, the second end 112 of the cover body 200 is also located in the annular groove 130. Then, the bent edge of the cover body 200 located in the annular groove 130 is tightened by the second clamp.

[0062] In some embodiments of this application, the cover 200 is made of a non-metallic material. For example, the cover 200 is made of polypropylene, polytetrafluoroethylene, or elastic plastic material.

[0063] As a household appliance, electric water heaters require components that come into direct contact with water to have good insulation properties to avoid the risk of electric shock. Non-metallic materials are inherently non-conductive; when the casing 200 is made of non-metallic material, it can block any potential conductive path between the inlet pipe 100 and the inner tank. Even if the inlet pipe 100 becomes electrified due to corrosion or wear over time, the non-metallic casing 200 can effectively isolate the current, preventing it from being conducted to the outside through the water flow or the inner tank. This significantly improves the electrical safety of the electric water heater and reduces the risk of electric shock for users.

[0064] The water inside the inner tank of an electric water heater typically contains certain minerals and impurities, which can corrode metal components over long-term use. Non-metallic materials possess excellent chemical stability, are less prone to reacting with acids and alkalis in the water, and can withstand long-term immersion and corrosion. Compared to metal enclosures, non-metallic enclosures 200 are less prone to rust and perforation during long-term use, effectively extending their lifespan and thus ensuring the overall structural stability and functional reliability of the inlet pipe assembly 2.

[0065] Non-metallic materials generally have a lower density than metallic materials, and using non-metallic materials to make the cover 200 can significantly reduce its weight. This not only reduces the overall weight of the water inlet pipe assembly 2, making it easier to install and fix inside the electric water heater, but also reduces the load on other components during assembly, lowers the assembly difficulty and labor intensity, and is also conducive to the overall lightweight design of the electric water heater.

[0066] Most non-metallic materials have lower raw material prices than metallic materials, and their processing technology is relatively simple and production efficiency is high, which can effectively reduce the manufacturing cost of the housing 200. The low-cost housing 200 helps to reduce the production cost of the inlet pipe assembly 2 and even the entire electric water heater, improves the product's market competitiveness, and provides consumers with a more cost-effective product.

[0067] In some embodiments of this application, the cover 200 is made of elastic plastic material. When installing the water inlet pipe 100, the water inlet pipe 100 is inserted into the inner tank from the outside in. During the insertion process, the cover 200 undergoes elastic deformation and is compressed, facilitating the insertion and installation of the water inlet pipe 100. The deformation of the elastic plastic material is reversible. After installation, the cover 200 can return to its designed shape and size, ensuring that a predetermined water outlet gap 230 is formed between it and the water inlet pipe 100, and ensuring that the normal function of the water inlet pipe assembly 2 is not affected by the installation process.

[0068] Furthermore, due to the limited installation space of the inner liner and the potential for precise alignment between the inlet pipe 100 and the inner liner, the cover 200, made of traditional rigid materials, is prone to jamming during insertion if it encounters even slight positional deviations or obstacles. This can lead to difficulty in insertion and may even cause damage to the cover 200 or the inner liner components due to forced insertion. In contrast, elastic plastic materials possess excellent elastic deformation capabilities. During the insertion of the inlet pipe 100 into the inner liner, when the cover 200 experiences slight collisions or compression with the inner wall of the inner liner or other components, the cover 200 can actively adapt to changes in the shape and position of the contact area through its own elastic deformation. For example, if there is a slight deviation in the insertion path, the cover 200 can bend to one side under the contact force. After passing through the obstacle area, it can return to its original shape due to its elasticity, avoiding obstruction caused by rigid collisions.

[0069] This elastic deformation characteristic makes the insertion of the inlet pipe 100 smoother, reducing the precision requirements for installation operations and decreasing installation time and labor costs. At the same time, due to the elastic cushioning effect of the cover 200, the impact on the inlet pipe 100 and the inner tank during insertion is effectively reduced, protecting the components from damage and improving the safety and reliability of the installation process.

[0070] In summary, the cover 200 is made of elastic plastic material, which greatly simplifies the installation process of the water inlet pipe 100, improves installation efficiency and success rate, and provides good protection for the components. In some embodiments of this application, the cover 200 has a conical structure.

[0071] From the perspective of water flow, the inner wall of the conical structure shroud 200 is inclined. When water flows from the outlet 120 of the inlet pipe 100 into the outlet gap 230 between the shroud 200 and the inlet pipe 100, it flows along the inclined direction of the inner wall of the cone. Because the conical structure has gradually changing cross-sectional dimensions from one end to the other, the water flow is guided by the inner wall during its flow, gradually converging towards the open end 231 of the shroud 200. This guiding effect further optimizes the water flow path, reduces turbulence and eddies within the gap, and makes the circumferential distribution of the water flow more uniform when it flows out at the open end 231, thereby improving the uniformity of the water outlet from the inlet pipe assembly 2.

[0072] From an installation convenience perspective, the conical cover 200 has unique advantages during the insertion of the inlet pipe 100 into the inner liner. Because the conical structure has a gradually tapering front end, when the inlet pipe 100 is inserted into the inner liner from the outside in, the front end of the cover 200 can first contact the installation opening or internal space of the inner liner. Compared to covers of other shapes, the conical front end is easier to enter narrow installation spaces, providing a guiding effect and reducing the difficulty of positioning during insertion. Furthermore, considering the potential use of elastic plastic materials for the cover 200, the front end of the conical structure can more easily adjust its shape through elastic deformation when encountering slight obstructions, further reducing jamming during insertion and improving installation efficiency.

[0073] Furthermore, the conical structure of the cover 200 provides better structural stability under water flow impact. When water flows into the gap from the outlet 120 and impacts the inner wall of the cover 200, the conical inner wall can disperse and transmit the impact force of the water flow along the inclined direction, avoiding stress concentration in local areas. This dispersion effect can reduce fatigue damage to the cover 200 caused by long-term water flow impact, extend the service life of the cover 200, and ensure the long-term stable functioning of the inlet pipe assembly 2.

[0074] In some embodiments of this application, the water outlet gap 230 is filled with scale inhibitor material and / or filter material.

[0075] When the outlet gap 230 is filled with scale inhibitor material (such as food-grade scale inhibitor, ion exchange resin, etc.), the water will come into full contact with the scale inhibitor material as it flows through the gap. The scale inhibitor material can reduce the concentration of scale-forming ions such as calcium and magnesium in the water through chemical action (such as chelating calcium and magnesium ions in the water) or physical adsorption, preventing them from forming scale at the outlet hole 120 of the inlet pipe 100, the open end 231 of the cover 200, and the inner wall of the inner tank.

[0076] From the perspective of the inlet pipe assembly 2 itself, reducing scale formation can prevent the outlet holes 120 from becoming clogged, ensuring stable flow rates at each outlet hole 120, maintaining uniform water flow within the outlet gap 230, and ensuring that the inlet pipe assembly 2 maintains good water delivery performance over the long term. For the inner tank of the electric water heater, the scale-inhibiting material can significantly reduce the rate of scale formation on the inner wall of the tank, reducing problems such as reduced tank volume and decreased heating efficiency caused by scale buildup. Simultaneously, reducing scale also lowers the thermal resistance of the heating element surface, making it easier for heat to be transferred to the water, improving the heating efficiency of the electric water heater, and saving energy.

[0077] If the water outlet gap 230 is filled with filter material (such as activated carbon, ceramic filter media, PP cotton, etc.), impurities in the water (such as silt, rust, colloidal particles, etc.) will be intercepted and adsorbed by the filter material when the water flows through the gap.

[0078] This process first purifies the water entering the inner tank, preventing impurities from accumulating and clogging the outlet 120, ensuring unobstructed flow and uniform water distribution. Secondly, the filtered water reduces the accumulation of impurities at the bottom or inner wall of the tank, decreasing the frequency and difficulty of cleaning. For users, filtered water is cleaner, reducing skin irritation and improving the user experience. Furthermore, the pure water reduces wear and contamination of other internal components of the water heater (such as heating elements and sensors), extending their lifespan.

[0079] When both scale inhibitor and filter materials are filled in the outlet gap 230, they work synergistically. The filter material first purifies the water flow, removing solid impurities and preventing them from affecting the contact area and efficiency of the scale inhibitor. Then, the scale inhibitor further treats the filtered water, improving water quality. This "filter first, scale inhibit later" approach comprehensively improves the water quality entering the inner tank, reducing scale formation and impurity contamination at the source, and significantly enhancing the long-term reliability and lifespan of the inlet pipe assembly 2 and the water heater.

[0080] The scale-inhibiting and / or filter materials filling the gaps perform their functions without affecting the original water flow buffering and homogenization effects of the outlet gaps 230. The gaps between the materials still provide a flow channel for the water. During the contact process with the materials, the water can still achieve pressure balance and circumferential mixing within the gaps, ensuring that the water flowing out from the open end 231 of the cover 200 remains uniform, achieving the dual effect of water quality optimization and improved water flow uniformity.

[0081] In some embodiments of this application, a mesh plate (not shown) is provided at the opening 231. On the one hand, the mesh plate intercepts impurities and prevents them from flowing into the inner liner; on the other hand, the water flow holes on the mesh plate further buffer the water flow.

[0082] In some embodiments of this application, a reinforcing member 220 is provided at the first end 111 of the cover 200, and the reinforcing member 220 is provided around the first end 111 of the cover 200.

[0083] Since the cover 200 is made of plastic and the second end 112 of the cover 200 is fixedly connected to the water inlet pipe 100, and the first end 111 of the cover 200 is open, the overall stability of the cover 200 is improved by setting a reinforcing member 220 on the first end 111 of the cover 200.

[0084] In one specific embodiment, the first end 111 of the cover 200 is provided with a flange, and the reinforcing member 220 is a clamp, referred to as the second clamp, which is fixed to the first end 111 of the cover 200 by the flange.

[0085] In a currently disclosed electric water heater, the water flow sensor is installed as a separate component on the external water inlet pipe, which increases system complexity and presents installation and maintenance issues. Furthermore, since the flow rate in the inlet pipe is not directly monitored during water intake, a certain degree of measurement error exists.

[0086] To address this technical problem, some embodiments of this application refer to... Figure 2 and Figure 3 The water inlet pipe assembly 2 also includes an installation pipe 300. A water inlet channel 310 is formed inside the installation pipe 300. The first end 111 of the water inlet pipe 100 is connected to the installation pipe 300, and the water inlet pipe 100 is connected to the water inlet channel 310.

[0087] The inlet pipe assembly 2 also includes a water flow sensor 400. The water flow sensor 400 includes a magnetic rotor assembly 410 and a Hall effect sensor 420. Figure 5 This is an exploded view of the magnetic rotor assembly 410. The magnetic rotor assembly 410 is disposed within the water inlet channel 310. A Hall effect sensor 420 is disposed on the mounting tube 300. For example, the Hall effect sensor 420 is fixed to the outer wall of the mounting tube 300 by means of screws 421 or the like. The Hall effect sensor 420 corresponds to the magnetic rotor assembly 410.

[0088] Water from the external water supply pipe first flows through the installation pipe 300, then through the magnetic rotor assembly 410, and finally into the inlet pipe 100.

[0089] The magnetic rotor assembly 410 includes a first housing 411 and a second housing 412. Both housings are provided with openings for water flow. The first housing 411 and the second housing 412 are connected. A magnetic rotor 413 is rotatably disposed within the space enclosed by the two housings.

[0090] The water flow sensor 400 uses the Hall effect of the Hall sensing element 420 to measure magnetism and convert it into a flow signal. When water flows from the installation pipe 300 to the inlet pipe 100, the water flows through the magnetic rotor assembly 410. The magnetic rotor 413 rotates, generating rotating magnetic fields with different magnetic poles, cutting magnetic induction lines, and generating high and low pulse levels. Since the frequency of the output pulse signal of the turbine flow meter is proportional to the rotational speed of the magnetic rotor 413, and the rotational speed of the rotor is proportional to the water flow rate, the magnitude of the water flow rate is determined accordingly.

[0091] The water inlet pipe assembly 2 of this application includes an installation pipe 300 and a water inlet pipe 100. A water inlet channel 310 is formed inside the installation pipe 300. The water inlet pipe 100 is fixedly connected to the installation pipe 300 and communicates with the water inlet channel 310. The installation pipe 300 is an insulating pipe and is fixedly installed on the outer casing 1 of the electric water heater, thereby achieving fixed installation of the water inlet pipe assembly 2 on the outer casing 1. A magnetic rotor assembly 410 is provided inside the water inlet channel 310 of the installation pipe 300, and a Hall effect sensing element 420 is provided on the outer wall of the installation pipe 300. By integrating the magnetic rotor assembly 410 into the interior of the installation pipe 300, the integrated design eliminates the need for a water flow sensor component in the external water inlet pipe, reduces system complexity, and facilitates installation and maintenance. At the same time, it enables direct monitoring of the water flow in the water inlet channel 310, improving the accuracy of water flow monitoring.

[0092] In some embodiments of this application, a sleeve 320 is provided inside the water inlet channel 310, and the first end 111 of the water inlet pipe 100 is inserted into the sleeve 320, sealing the two together. A gasket 330 is provided on the outside of the sleeve 320 to further improve the sealing effect.

[0093] A step 311 is formed inside the water inlet channel 310. During installation, the magnetic rotor assembly 410 is first inserted into the wide-diameter end of the water inlet channel 310 until it abuts against the step 311; then the sleeve fitting 320 is installed and placed into the wide-diameter end of the water inlet channel 310; then the water inlet pipe 100 is inserted into the sleeve fitting 320 to achieve fixed installation of the water inlet pipe 100, and the water inlet pipe 100 is connected to the water inlet channel 310.

[0094] 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.

[0095] 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. A water inlet pipe assembly, characterized by, Including: The water inlet pipe has a first end and a second end, the first end being a water inlet and the second end being closed, and the water inlet pipe has multiple water outlet holes on its peripheral wall. The cover is fitted around the water inlet pipe, and the plurality of water outlet holes are located inside the cover. A water outlet gap is formed between the cover and the water inlet pipe, with one end of the water outlet gap closed and the other end open.

2. The water inlet pipe assembly according to claim 1, characterized in that, The plurality of water outlet holes are located near the second end of the water inlet pipe, and the opening of the water outlet gap is located away from the second end of the water inlet pipe.

3. The water inlet pipe assembly according to claim 2, characterized in that, The water outlet gap increases from the second end of the water inlet pipe toward the first end.

4. The water inlet pipe assembly according to claim 2, characterized in that, The second end of the cover is provided with a fastener, which fixes the second end of the cover to the second end of the water inlet pipe.

5. The water inlet pipe assembly according to claim 4, characterized in that, The second end of the water inlet pipe is provided with an annular groove, and the fastener is engaged in the annular groove.

6. The water inlet pipe assembly according to claim 1, characterized in that, The cover is made of non-metallic materials.

7. The water inlet pipe assembly according to claim 1, characterized in that, The water outlet gap is filled with scale inhibitor material and / or filter material.

8. The inlet tube assembly of any one of claims 1 to 7, wherein, It also includes: An installation pipe is provided, wherein a water inlet channel is formed inside the installation pipe, and the first end of the water inlet pipe is connected to the installation pipe and the water inlet pipe is connected to the water inlet channel. The water flow sensor includes a magnetic rotor assembly and a Hall effect sensor. The magnetic rotor assembly is disposed in the water inlet channel, and the Hall effect sensor is disposed on the mounting pipe.

9. The water inlet pipe assembly according to claim 8, characterized in that, A sleeve is provided inside the water inlet channel, and the first end of the water inlet pipe is inserted into the sleeve.

10. An electric water heater comprising a housing, a liner being arranged in the housing, characterized in that, It also includes a water inlet pipe assembly as described in any one of claims 1 to 9, the water inlet pipe being located within the inner liner.

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