Electric heating component and electric water heater

Abstract

The application discloses an electric heating component and an electric water heater. The electric heating component is used for being installed on an inner container and heating water stored in the inner container. The inner container is in a flat structure and comprises a flange and an electric heating pipe. The flange is used for being installed on the inner container. The electric heating pipe has an installation part, a supporting part and an arc-shaped extension part which are sequentially connected. The installation part is arranged on the flange and extends towards the inside of the inner container along the thickness direction of the inner container. The supporting part extends downwards along the height direction of the inner container. The arc-shaped extension part is located at the bottom of the inner container and extends along the bottom of the inner container. The electric heating component has improved heating efficiency, and the electric water heater has improved heating performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to an electric heating component and an electric water heater. BACKGROUND

[0002] At present, water heaters are commonly used household appliances in people's daily life, and the water heaters are divided into electric water heaters and gas water heaters according to different heating sources. The electric water heater is widely used because of its convenient installation. The electric water heater usually comprises an inner container and an electric heater, and the electric heater is arranged in the inner container to heat the water in the inner container by the electric heater.

[0003] For a conventional storage type electric water heater, it usually comprises a water tank, an electric heating component and an electric control board, the water tank comprises an outer shell and an inner container, the inner container is arranged in the outer shell, and a thermal insulation layer is formed between the outer shell and the inner container to improve the thermal insulation performance of the water tank. The inner container is generally arranged transversely, and for the heating pipe, the heating pipe is usually arranged in the inner container along the length direction of the inner container, and the heating pipe generates heat to heat the water in the inner container after being electrified. The conventional water tank is usually of a cylindrical structure, which causes the electric water heater to occupy a large space in the room, resulting in poor user experience. Chinese patent application No. 201820211071.X discloses a heating device, an inner container comprising the heating device and a water heater comprising the inner container, adopts a two-section structure and forms a flat type container body, thereby reducing the occupancy amount of indoor space; correspondingly, the electric heating component adopts a bent electric heating pipe to heat the water in the inner container. However, due to the significant increase in the height dimension of the flat inner container, the heating efficiency of the electric heating pipe is low, and the heating performance is poor.

[0004] In view of this, how to design a water heater technology with high heating efficiency to improve the heating performance is a technical problem to be solved by the present application. SUMMARY

[0005] The present application provides an electric heating component and an electric water heater, which realize improving the heating efficiency of the electric heating component and improving the heating performance of the electric water heater.

[0006] To achieve the above technical purpose, the present application adopts the following technical scheme:

[0007] In one aspect, the present application provides an electric heating component for installing on an inner container and heating the stored water in the inner container, wherein the inner container is of a flat type structure, comprising:

[0008] a flange for installing on the inner container;

[0009] The electric heating tube has a mounting portion, a supporting portion and an arc-shaped extending portion connected in sequence, the mounting portion is arranged on the flange, the mounting portion extends towards the inside of the inner container along the thickness direction of the inner container, the supporting portion extends downwards along the height direction of the inner container, and the arc-shaped extending portion is located at the bottom of the inner container and extends along the bottom of the inner container.

[0010] In an embodiment of the present application, the supporting portion extends obliquely towards one side of the inner container along the height direction of the inner container.

[0011] In an embodiment of the present application, the arc-shaped extending portion extends from one side of the inner container to the other side of the inner container along the bottom of the inner container.

[0012] In an embodiment of the present application, the cross section of the inner container perpendicular to the thickness direction is circular or elliptical, and the arc-shaped extending portions are symmetrically distributed along the perpendicular line of the center of the inner container.

[0013] In an embodiment of the present application, the electric heating tube is of a meandering structure, and both ends of the electric heating tube are fixed on the flange.

[0014] In an embodiment of the present application, the electric heating tube has two mounting portions arranged side by side, has two supporting portions arranged side by side, and has two arc-shaped extending portions arranged side by side, and the two arc-shaped extending portions are connected together.

[0015] In an embodiment of the present application, the two mounting portions are arranged in parallel with each other.

[0016] In an embodiment of the present application, the two supporting portions are arranged side by side in a plane perpendicular to the thickness direction of the inner container, and the two arc-shaped extending portions are also arranged side by side in a plane perpendicular to the thickness direction of the inner container.

[0017] In an embodiment of the present application, the electric heating component includes a plurality of electric heating tubes, and the plurality of electric heating tubes are arranged side by side.

[0018] In another aspect, the present application also provides an electric water heater, which includes a shell, an inner container and an electric heating component, the inner container is arranged in the shell, a heat preservation layer is arranged between the inner container and the shell, and the electric heating component is arranged on the inner container and adopts the above electric heating component.

[0019] Compared with the prior art, the advantages and positive effects of the present application are that the electric heating pipe is installed on the flange through the mounting part and extends to the lower part of the inner container through the supporting part, so that the arc-shaped extension part can be arranged in the bottom area of the inner container, and more importantly, the arc-shaped extension part will extend along the bottom of the inner container, thereby fully utilizing the area of the bottom of the inner container to arrange the arc-shaped extension part, and at the same time, the arc-shaped extension part can heat the stored water in the inner container at the bottom of the inner container, and by using the principle of hot water rising and cold water descending, the cold water at the bottom of the inner container is fully heated, ensuring uniform heating of the whole container, effectively improving the heating efficiency of the electric heating part, and improving the heating performance of the electric water heater. In addition, due to the arc-shaped structure of the bottom arc-shaped extension part matching the bottom profile in the inner container, on the one hand, the operator can easily insert the electric heating pipe into the inner container and rotate and assemble along the bottom profile of the inner container, and on the other hand, the extension length of the arc-shaped extension part in the bottom of the inner container can be maximized to improve the heating capacity. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 Structure schematic view of an embodiment of the electric heating part of the present application;

[0023] Figure 2 Structure schematic view of an embodiment of the electric heating part of the present application;

[0024] Figure 3 Reference view of the use state of an embodiment of the electric heating part of the present application;

[0025] Figure 4 Structure schematic view of an embodiment of the water tank for the electric water heater of the present application;

[0026] Figure 5 Exploded view of an embodiment of the water tank for the electric water heater of the present application;

[0027] Figure 6A sectional view of an embodiment of the electric water heater of the present application;

[0028] Figure 7 A sectional view of an embodiment of the electric water heater of the present application; Figure 6 A partial enlarged view of region A in the middle;

[0029] Figure 8 A sectional view of an embodiment of the electric water heater of the present application; Figure 6 A partial enlarged view of region B in the middle;

[0030] Figure 9 A sectional view of an embodiment of the electric water heater of the present application;

[0031] BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Housing 1;

[0033] Rear shell 11, first screw hole 111, mounting table 112, second positioning groove 113, stepped surface 114, blocking rib 115;

[0034] Lining plate 12, first through hole 121, first clamping portion 122, second screw hole 123, first guide sliding groove 124, second guide sliding groove 125, positioning rib 126, extension edge 127;

[0035] Clamping groove 1221, first positioning groove 1222;

[0036] Front shell 13, second clamping portion 130, front panel 131, shell 132, second through hole 133, recess 134, insertion slot 135, second insertion tongue 136, extension portion 137;

[0037] Clamping jaw 1301, first insertion tongue 1302;

[0038] Mounting port 101, annular shielding portion 102;

[0039] Inner container 2;

[0040] Flange connection port 201, connection frame 202;

[0041] Electric heating component 3;

[0042] Mounting portion 311, support portion 312, arc-shaped extension portion 313;

[0043] Hanging rack 100. DETAILED DESCRIPTION

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0045] It should be noted that, in the description of the present application, the terms of "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0046] In the present application, unless otherwise explicitly specified and limited, the terms of "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium, or can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0048] The disclosure that follows provides many different embodiments, or examples, for implementing different structures of the application. For the purpose of simplicity, the elements and settings of the particular examples below are described. Of course, they are merely examples and are not intended to limit the application. Furthermore, the application can be implemented in a variety of settings other than those described below. The repeated use of reference characters in the specification and drawings is intended to represent the presence of a similar or identical feature or element throughout the specification and drawings. Furthermore, various specific processes and materials are described in this disclosure, but other processes and / or materials can be used.

[0049] The electric water heater is a water heater which uses electric energy as the main energy material, and generates high-temperature heat after being electrified to directly heat the water stored in the electric water heater, so as to achieve the purpose of preparing hot water.

[0050] The electric water heater generally comprises a water tank, an electric heating component, and an electric control board, etc. The water tank forms a water storage cavity to store water to be heated. The electric heating component is inserted into the water storage cavity formed by the water tank. The electric control board is used to control the on-off operation of the electric heating component, so that the water in the water tank is heated to a set temperature.

[0051] For the water tank of the electric water heater, the water tank generally comprises an outer shell and an inner container, and a heat preservation layer is formed between the outer shell and the inner container. The outer shell is generally made of plastic material to meet the design requirements of aesthetic and diversified modeling. The inner container can be made of a metal container body or a plastic container body according to needs.

[0052] In addition, the heat preservation layer formed between the outer shell and the inner container is commonly made of materials such as asbestos, sponge, foamed plastic, and polyurethane foam. In conventional technology, in order to obtain good heat preservation effect, the heat preservation layer is generally formed by foaming.

[0053] For the inner container with a metal container body, the inside of the inner container is prone to corrosion due to the influence of water quality. Therefore, a magnesium rod is arranged on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0054] Since magnesium is the metal with the lowest potential in the electrochemical series and is nontoxic in physiology, it is very ideal to be used to make the magnesium rod to protect the inner container. The size of the magnesium rod is directly related to the length of the protection time and the size of the protection effect of the inner container. The larger the magnesium rod is, the better the protection effect is, and the longer the protection time is.

[0055] In addition, a water inlet pipe and a water outlet pipe are arranged on the water tank. The water inlet pipe is used to deliver cold water to the water storage cavity formed in the water tank, and the hot water in the water storage cavity is output from the water outlet pipe.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] A water tank for an electric water heater according to an embodiment of the present invention. It should be noted that the water tank of this embodiment can be installed on a vertically extending wall or on a horizontally extending wall.

[0060] For ease of description, the following description uses the example of a water tank installed on a vertical wall to illustrate the structure of the water tank.

[0061] Example 1, such as Figures 1-3 As shown, the present invention also provides an electric heating element 3 for use in an electric water heater. The electric heating element 3 is used to install on the inner tank 2 and heat the water stored in the inner tank 2. The inner tank 2 has a flat structure, and the electric heating element 3 includes:

[0062] Flange 32, the flange being used for mounting on the inner liner 2;

[0063] The electric heating element 31 has a mounting part 311, a support part 312 and an arc-shaped extension part 313 connected in sequence. The mounting part 311 is disposed on the flange and extends toward the inside of the inner liner 2 along the thickness direction of the inner liner 2. The support part 312 extends downward along the height direction of the inner liner 2. The arc-shaped extension part 313 is located at the bottom of the inner liner 2 and extends along the bottom of the inner liner 2.

[0064] Specifically, the electric heating element 31 adopts a multi-segment bending structure, and its mounting part 311 is used to fix it on the flange so that the electric heating element 3 is fixedly installed on the flange connection port of the inner liner 2 through the flange. One end of the mounting part 311 is fixed on the flange, and the other end extends along the thickness direction of the inner liner 2 toward the inside of the inner liner 2, so that the electric heating element 31 is located entirely inside the inner liner 2.

[0065] In order to improve heating efficiency, especially to effectively and evenly heat the water at the bottom of the inner liner 2, the support part 312 will extend towards the bottom of the inner liner 2, so that the arc-shaped extension part 313 can extend along the bottom of the inner liner 2.

[0066] During the process of the electric heating tube being electrified to heat, the arc-shaped extension part 313 can comprehensively and effectively heat the water at the bottom of the inner container 2, and finally make the water in the inner container 2 be uniformly heated by using the principle of hot water rising, so as to improve the overall heating efficiency of the electric heating part 3.

[0067] In some embodiments, in order to effectively increase the heating area of the arc-shaped extension part 313, the support part 312 extends along the height direction of the inner container 2 and inclines towards one side of the inner container 2.

[0068] Specifically, for the support part 312, it extends towards one side of the inner container 2, so that the arc-shaped extension part 313 can be more comprehensively distributed in the bottom area of the inner container 2, so as to better heat the stored water at the bottom of the inner container 2.

[0069] In actual design process, for the arc-shaped extension part 313, the arc-shaped extension part 313 extends along the bottom of the inner container 2 from one side of the inner container 2 to the other side of the inner container 2. Specifically, the arc-shaped extension part 313 is distributed in the two side areas of the bottom of the inner container 2, so as to realize more uniform distribution of heat. For the structure shape of the used inner container 2, the cross section of the inner container 2 perpendicular to the thickness direction is circular or elliptical, and the arc-shaped extension part 313 is symmetrically distributed along the perpendicular line of the center of the inner container 2.

[0070] In other embodiments, the electric heating tube is of a meandering structure, and both ends of the electric heating tube are fixed on the flange.

[0071] Specifically, both ends of the electric heating tube are fixedly installed on the flange, and the electric heating tube as a whole extends in the inner container 2 in a meandering distribution manner.

[0072] In a preferred embodiment, the electric heating tube has two installation parts 311 arranged side by side, the electric heating tube has two support parts 312 arranged side by side, the electric heating tube has two arc-shaped extension parts 313 arranged side by side, and the two arc-shaped extension parts 313 are connected together.

[0073] Specifically, during the meandering bending process of the electric heating tube, the corresponding installation part 311, support part 312 and arc-shaped extension part 313 arranged side by side, and the two installation parts 311 arranged side by side can be firmly fixed on the flange, so that the electric heating tube can be well supported.

[0074] In addition, the two support parts 312 are arranged side by side in a plane perpendicular to the thickness direction of the inner container 2, and the two arc-shaped extension parts 313 are also arranged side by side in a plane perpendicular to the thickness direction of the inner container 2.

[0075] Specifically, the support part 312 and the arc-shaped extension part 313 are located in the same plane, so that the electric heating pipe is more convenient to bend and process, and the two arc-shaped extension parts 313 are arranged side by side on the bottom of the inner container 2, which can realize layered heating to improve the heating efficiency.

[0076] In some embodiments, for different volumes of the inner container 2, a plurality of electric heating pipes can be arranged on the flange according to the size of the volume of the inner container 2.

[0077] The electric heating pipe is installed on the flange through the mounting part and extends to the lower part of the inner container through the support part, so that the arc-shaped extension part can be arranged in the bottom area of the inner container. More importantly, the arc-shaped extension part will extend along the bottom of the inner container, thereby fully utilizing the area of the bottom of the inner container to arrange the arc-shaped extension part. At the same time, the arc-shaped extension part can heat the water in the inner container at the bottom of the inner container, and utilize the principle of hot water rising and cold water descending to make the cold water at the bottom of the inner container fully heated, thereby ensuring uniform heating of the whole water in the inner container and effectively improving the heating efficiency of the electric heating component to improve the heating performance of the electric water heater.

[0078] Based on the above embodiment one, embodiment two, as Figures 4-8 shown, the application also provides a heat preservation water tank for an electric water heater, wherein the water tank is installed with the electric heating component 3 in the above embodiment one, and the water tank adopts a flat design to reduce the effective space occupied by the electric water heater in the indoor space. The heat preservation water tank comprises an outer shell 1, an inner container 2 and an electric heating component 3 assembled together. Since the outer shell 1 and the inner container 2 are flat structures, the outer shell 1, the inner container 2 and the electric heating component 3 are improved as follows.

[0079] The front part of the outer shell 1 is provided with a mounting port 101, and the inner wall of the outer shell 1 is further provided with an annular shielding part 102 arranged around the mounting port 101.

[0080] The front part of the inner container 2 is provided with a flange connecting port 201.

[0081] The inner container 2 is located in the outer shell 1, the annular shielding part 102 surrounds the outer side of the flange connecting port 201, a heat preservation layer (not shown) is arranged between the outer shell 1 and the inner container 2, and the electric heating component 3 is arranged on the flange connecting port 201 and extends into the inner container 2.

[0082] Specifically, the water tank adopts a flat design as a whole, and the thickness dimension is smaller than the height and length dimensions. In order to meet the installation requirements of the electric heating component 3 and also meet the maintenance requirements of the electric heating component 3 in the later period, the front part of the outer shell 1 is provided with a mounting port 101, and the front part of the inner container 2 is provided with a flange connecting port 201 correspondingly.

[0083] When the electric heating element 3 needs to be assembled, the electric heating element 3 can be inserted from the installation opening 101 and extend into the inner container 2 through the flange connecting opening 201 to complete the assembly. Similarly, when the electric heating element 3 needs to be replaced in the later maintenance, the electric heating element 3 can be removed from the inner container 2 through the installation opening 101 and taken out conveniently.

[0084] Meanwhile, for the water tank with flat structure, the electric heating element 3 is installed at the front of the inner container 2 to make full use of the area of the front surface of the inner container 2 to firmly and reliably install the electric heating element 3.

[0085] More importantly, in the foaming process, in order to reduce or avoid the overflow of the foaming material from the periphery of the flange connecting opening 201 of the inner container 2, the annular shielding part 102 extending towards the flange connecting opening 201 is formed on the inner wall of the outer shell 1, and the annular shielding part 102 has a whole barrel structure and surrounds the periphery of the installation opening 101. After the inner container 2 is installed in the outer shell 1, the annular shielding part 102 will surround the periphery of the flange connecting opening 201, and a region for blocking the leakage of the foaming material is formed between the annular shielding part 102 and the flange connecting opening 201.

[0086] The foaming cavity is formed between the outer shell 1 and the inner container 2. After the foaming material is injected into the foaming cavity, when the foaming material flows to the flange connecting opening 201, the foaming material can be blocked by the annular shielding part 102, thereby reducing the leakage of the foaming material from the flange connecting opening 201.

[0087] In some embodiments, in order to improve the effect of preventing overflow, the edge of the annular shielding part 102 abuts against the outer wall of the inner container 2.

[0088] Specifically, after the inner container 2 is installed in the outer shell 1, the edge of the annular shielding part 102 abuts against the outer wall of the inner container 2, so that in the foaming process, the annular shielding part 102 can better block the leakage of the foaming material from the flange connecting opening 201.

[0089] In the preferred embodiment, in order to facilitate assembly, a gap is formed between the edge of the annular shielding part 102 and the outer wall of the inner container 2. Further, in order to reduce the leakage of the foaming material from the gap, a first flexible sealing part (not shown) can be arranged outside the annular shielding part 102, and the first flexible sealing part blocks the gap.

[0090] Specifically, in the assembly process, the first flexible sealing part is first wound outside the annular shielding part 102 and extends to the edge of the annular shielding part 102. After the inner container 2 is installed in the outer shell 1, the first flexible sealing part deforms due to the elasticity and abuts tightly against the outer wall of the inner container 2, so that the gap between the annular shielding part 102 and the inner container 2 is effectively sealed by the first flexible sealing part.

[0091] Similarly, a second flexible sealing portion can also be provided outside the flange connecting port 201 to shield the gap.

[0092] Specifically, during assembly, a second flexible sealing portion is first wound around the flange connecting port 201 on the inner container 2. After the inner container 2 is installed into the outer shell 1, the annular shielding portion 102 is pressed against the second flexible sealing portion, so as to effectively seal the gap between the annular shielding portion 102 and the inner container 2 by the second flexible sealing portion.

[0093] In actual use, the specific entity of the flexible sealing portion can be a rubber cotton or a sealing washer, which is not limited or described herein.

[0094] In another embodiment, in order to better block the foaming material flowing to the flange connecting port 201 by the annular shielding portion 102, the outer diameter of the annular shielding portion 102 gradually decreases from the mounting port 101 to the flange connecting port 201.

[0095] Specifically, the annular shielding portion 102 has a horn-shaped cross section, the opposite end of the annular shielding portion 102 has a smaller size, and the outer wall of the annular shielding portion 102 forms an inclined surface. On the one hand, the smaller end can block the overflow of the foaming material, and on the other hand, the inclined outer wall can ensure that the foaming material can flow along it to uniformly distribute the foaming material outside the inner container 2.

[0096] In some embodiments, in order to effectively position the inner container 2 in the outer shell 1 before foaming, so as to avoid the inner container 2 from being offset in the outer shell 1 during foaming, a connecting frame 202 is provided on the back of the inner container 2, and threaded holes (not labeled) are provided on the connecting frame 202. Correspondingly, a hanging frame 100 is provided on the back of the outer shell 1, and mounting holes (not labeled) are provided on the hanging frame 100; a bolt passes through the mounting holes and extends into the outer shell 1 and is threadedly connected in the threaded holes, and the connecting frame 202 abuts against the inner wall of the outer shell 1.

[0097] Specifically, after the inner container 2 is installed into the outer shell 1, the inner container 2 is fixed to the outer shell 1 by the connecting frame 202, and at the same time, the connecting frame 202 is connected to the hanging frame 100 by the bolt, thereby also serving as a mounting function of the hanging frame 100.

[0098] In another embodiment, the mounting port 101 is formed on the front of the outer shell 1, and in order to optimize the appearance, a front panel 131 can be provided on the front of the outer shell 1 to shield the mounting port 101. In normal use, the front panel 131 is fixed to the front of the outer shell 1 to shield the mounting port 101, and when the electric heating component 3 needs to be repaired, the front panel 131 is removed.

[0099] By configuring an installation port at the front of the outer shell to meet the requirements of electric heating component installation and subsequent maintenance, and with an inwardly extending annular shielding part formed around the installation port inside the outer shell, the annular shielding part surrounds the flange connection port of the inner liner. Since the annular shielding part cooperates with the front surface of the inner liner, it can better prevent material overflow around the flange connection port. In this way, during the foaming process, after the foaming material flows between the outer shell and the inner liner, the flow of foaming material to the flange connection port of the inner liner can be blocked by the annular shielding part, thereby reducing the overflow of foaming material, improving foaming quality, and thus improving product quality.

[0100] Based on the above embodiment 2, the present invention also has the following structural design for the outer shell 1.

[0101] Example 3, as follows Figures 4-9 As shown, the outer shell 1 in embodiments two and three above adopts a flat design and an overall curved surface design to achieve a good appearance design effect.

[0102] To achieve a screwless design for the front view, the following structural design is adopted for the outer casing 1.

[0103] The housing 1 includes:

[0104] The rear cover 11 has a first screw hole 111 on its edge, and the back of the rear cover 11 forms a mounting surface.

[0105] The liner 12 has a first through hole 121 on its edge, a first snap-fit ​​part 122 on its outer surface, an installation opening 101 on its surface, and an annular blocking part 102 on its inner wall.

[0106] The front shell 13 has a second snap-fit ​​portion 130 on its inner surface.

[0107] The liner 12 is connected to the rear shell 11, the screw passes through the first through hole 121 and is threaded into the corresponding first screw hole 111, the front shell 13 covers the liner 12, and the first snap-fit ​​part 122 is connected to the corresponding second snap-fit ​​part 130.

[0108] The rear shell 11 and the liner 12 in the outer shell 1 are connected by screws, forming an installation cavity for installing the inner liner. The screw connection between the rear shell 11 and the liner 12 provides sufficient structural strength to meet the structural strength requirements for the subsequent foaming of the insulation layer between the outer shell 1 and the inner liner.

[0109] For the connecting process between the rear shell 11 and the backing plate 12, specifically, after the rear shell 11 and the backing plate 12 are butted together, the first through hole 121 is aligned with the corresponding first screw hole 111, and then the screw is threaded through the first through hole 121 and screwed into the first screw hole 111. In this way, the rear shell 11 and the backing plate 12 are firmly and reliably fastened together by the screw.

[0110] In order to achieve the appearance effect of no exposed screw, the front shell 13 is installed on the backing plate 12 by clamping. Specifically, after the rear shell 11 and the backing plate 12 are fixedly connected together, since the first through hole 121 on the backing plate 12 can be seen from the front of the shell 1, in order to make the overall appearance not expose the first through hole 121 and the screw, the first through hole 121 is shielded by the front shell 13.

[0111] For the connecting process between the front shell 13 and the backing plate 12, specifically, the second clamping part 130 on the front shell 13 is clamped with the first clamping part 122 at the corresponding position on the backing plate 12 to achieve clamping the front shell 13 on the backing plate 12. At the same time, the first through hole 121 is shielded by the front shell 13, so that the first through hole 121 cannot be seen from the outside of the shell assembly, achieving the overall appearance effect of no exposed screw. And since the clamping connection part is shielded by the front shell 13, the appearance effect is optimized.

[0112] In some embodiments, the specific performance entity of the first clamping part 122 and the second clamping part 130 can adopt various structural forms, which are illustrated below.

[0113] The second clamping part 130 includes a clamping jaw 1301, the first clamping part 122 includes a clamping slot 1221, and the clamping jaw 1301 is clamped in the clamping slot 1221.

[0114] Specifically, when the front shell 13 and the backing plate 12 are clamped and connected, the clamping jaw 1301 is clamped into the clamping slot 1221, and the clamping jaw 1301 and the clamping slot 1221 cooperate to connect the front shell 13 and the backing plate 12 together.

[0115] In order to improve the connection strength, the second clamping part 130 further includes a first insertion tongue 1302, and the first clamping part 122 further includes a first positioning slot 1222, and the first insertion tongue 1302 is inserted into the first positioning slot 1222.

[0116] Specifically, during assembly, the first insertion tongue 1302 is first inserted into the first positioning slot 1222 to pre-position the front shell 13 and the backing plate 12, and then the clamping jaw 1301 is clamped in the clamping slot 1221 to complete the assembly between the front shell 13 and the backing plate 12.

[0117] The opening direction of the first positioning slot 1222 and the clamping slot 1221 is opposite. In this way, the connecting part formed by the clamping tongue and the clamping slot 1221 cooperates with the connecting part formed by the first insertion tongue 1302 and the first positioning slot 1222, so that the front shell 13 can be more firmly and reliably mounted on the outer wall of the lining plate 12.

[0118] In another embodiment, since the clamping jaw 1301 and the first insertion tongue 1302 are both located on the inner wall of the front shell 13, when assembled, the inner wall of the front shell 13 cooperates with the outer wall of the lining plate 12, so that it is difficult for the operator to accurately insert the first insertion tongue 1302 into the positioning slot.

[0119] Therefore, the first guide sliding groove 124 and the second guide sliding groove 125 can be arranged on the outer surface of the lining plate 12, the first guide sliding groove 124 extends to the clamping slot 1221, and the second guide sliding groove 125 extends to the positioning slot.

[0120] Specifically, when assembled, the operator can first place the clamping jaw 1301 in the first guide sliding groove 124, and at the same time, the first insertion tongue 1302 is arranged in the second guide sliding groove 125.

[0121] Then, the operator slides the front shell 13 along the first guide sliding groove 124 and the second guide sliding groove 125, so that the first insertion tongue 1302 is accurately inserted into the first positioning slot 1222, and finally the clamping jaw 1301 is clamped in the clamping slot 1221.

[0122] Under the guidance of the first guide sliding groove 124 and the second guide sliding groove 125, the guide sliding groove can cooperate with the first insertion tongue 1302 and the clamping jaw 1301 to guide the sliding of the front shell 13.

[0123] Further, in the initial stage of installation, the front shell 13 and the lining plate 12 can be far apart, so as to facilitate the operator to observe the position of the clamping jaw 1301 and the first insertion tongue 1302, and further ensure that the clamping jaw 1301 and the first insertion tongue 1302 are accurately placed in the corresponding guide sliding groove.

[0124] Then, during the sliding process along the guide sliding groove, the distance between the front shell 13 and the lining plate 12 gradually decreases, and the operator relies on the guiding effect of the guide sliding groove to ensure that the first insertion tongue 1302 is inserted into the first positioning slot 1222 first.

[0125] Finally, the clamping jaw 1301 is clamped in the clamping slot 1221, so that the front shell 13 and the lining plate 12 are firmly connected together.

[0126] In other embodiments, in order to further improve the connection strength between the front shell 13 and the lining plate 12, the front shell 13 is improved as follows.

[0127] The front shell 13 comprises:

[0128] a front panel 131;

[0129] a shell 132, the shell 132 being provided with a second clamping portion 130, and the shell 132 being further provided with a second through hole 133;

[0130] The second screw hole 123 is further provided on the backing plate 12, the screw passes through the second through hole 133 and is screwed into the corresponding second screw hole 123, and the front panel 131 covers the second through hole 133 and is arranged on the front panel 131.

[0131] Specifically, the front shell 13 adopts a split design, the shell 132 is installed on the backing plate 12 by cooperating with the first clamping portion 122 through the second clamping portion 130. At the same time, the shell 132 and the backing plate 12 are further firmly connected together by the screw. The screw connecting the shell 132 and the backing plate 12 is shielded by the front panel 131 to meet the appearance design requirement that no screw is exposed on the front of the shell 1.

[0132] In an embodiment, the shell 132 is provided with a recess 134, the second through hole 133 is located in the recess 134, and the front panel 131 is arranged in the recess 134.

[0133] Specifically, the recess 134 is arranged on the front of the shell 132, and the front panel 131 is placed in the recess 134, so that the front of the shell 1 is more flat. At the same time, the second through hole 133 is located in the recess 134, so that the second through hole 133 can be shielded by the front panel 131 after the front panel 131 is assembled into the recess 134.

[0134] In another embodiment, in order to realize the convenient and firm installation of the front panel 131 on the shell 132, the recess 134 is further provided with a slot 135, and the front panel 131 is provided with a second plug 136, which is arranged in the corresponding slot 135.

[0135] Specifically, after the shell 132 is installed on the backing plate 12, the front panel 131 is inserted into the corresponding slot 135 through the plug arranged thereon to complete the installation. The plug and the slot 135 cooperate with each other to realize the appearance effect that no screw is exposed on the front of the shell 1.

[0136] In order to further improve the connection reliability of the front panel 131, an extension 137 extending towards the direction of the backing plate 12 is arranged on the upper portion of the front panel 131, and a third screw hole (not shown) is arranged on the extension 137, and a counterbore (not shown) is arranged on the shell 132, and the screw is screwed into the third screw hole through the counterbore.

[0137] Specifically, in order to meet the requirements of the appearance design, the extension 137 can be arranged on the upper portion or the lower portion of the front panel 131 according to the mounting position of the shell 1. In this embodiment, the extension 137 is arranged on the bottom of the front panel 131, and the counterbore is arranged on the bottom of the shell 132, and the front panel 131 is connected and fixed by the screw from the bottom after the snap connection of the plug and the slot 135.

[0138] Preferably, a detachable plug (not shown) can also be arranged on the counterbore, and the screw in the counterbore is covered by the plug after the front panel 131 is fixed on the shell 132 by the screw, so as to further meet the design requirements of the shell 1 without screw exposed on the front surface.

[0139] In some embodiments, in order to facilitate the on-site assembly of the backing plate 12 and the rear shell 11 by the operator, the inner wall of the rear shell 11 is provided with a mounting table 112, and the mounting table 112 is provided with the first threaded hole.

[0140] Specifically, during the assembly process, the mounting table 112 can support and position the backing plate 12, so as to facilitate the operator to quickly connect and assemble the backing plate 12 and the rear shell 11 together.

[0141] In another embodiment, in order to facilitate the positioning and assembly of the rear shell 11 and the backing plate 12, a second positioning groove 113 can be arranged on the mounting table 112, and the edge of the backing plate 12 is clamped in the second positioning groove 113.

[0142] Specifically, during the assembly of the rear shell 11 and the backing plate 12, the edge of the backing plate 12 can be inserted into the second positioning groove 113 first, so that the rear shell 11 and the backing plate 12 are pre-assembled together.

[0143] Then, the relative position between the rear shell 11 and the backing plate 12 is adjusted, so that the first through hole 121 is aligned with the first threaded hole 111.

[0144] Finally, the screw is screwed into the first threaded hole 111 through the first through hole 121, so that the rear shell 11 and the backing plate 12 are firmly and reliably assembled together.

[0145] In order to accurately position the position relationship between the rear shell 11 and the lining plate 12, so as to improve the assembly accuracy. The inner wall of the rear shell 11 can be provided with a stepped surface 114, and the outer wall of the lining plate 12 is provided with a positioning rib 126 which abuts against the stepped surface 114.

[0146] Specifically, in the process of assembling the rear shell 11 and the lining plate 12, reference is made to the above-mentioned pre-positioning process through the positioning groove, so that the rear shell 11 and the lining plate 12 are pre-assembled together. At the same time, after the edge of the lining plate 12 is inserted into the positioning groove, the positioning rib 126 on the lining plate 12 will abut against the stepped surface 114, thereby accurately positioning the rear shell 11 and the lining plate 12, so as to improve the overall assembly quality of the shell assembly.

[0147] In an embodiment, the edge of the rear shell 11 is also provided with a blocking rib 115 which is located outside the stepped surface 114, and the edge of the front shell 13 is provided with an extension edge 127 which surrounds the outside of the blocking rib 115.

[0148] Specifically, the front shell 13 can cover the entire outer surface of the lining plate 12, and the front shell 13 can cover the lining plate 12 as a whole outside the lining plate 12, thereby optimizing the visual effect of the appearance. At the same time, for the blocking rib 115 formed on the edge of the rear shell 11, on the one hand, during assembly, the blocking rib 115 can be pre-positioned by cooperating with the extension edge 127, so as to improve the assembly efficiency and accuracy; on the other hand, the blocking rib 115 is shielded by the extension edge 127 formed by the edge of the front shell 13, which is more conducive to improving the overall appearance effect.

[0149] In a preferred embodiment, for the butt joint area between the front shell 13 and the rear shell 11, the edge of the front shell 13 is aligned with the edge of the rear shell 11, thereby reducing the size of the connection gap generated at the butt joint area of the front shell 13 and the rear shell 11.

[0150] In addition, the number of connection parts between the rear shell 11 and the lining plate 12, and the number of connection parts between the front shell 13 and the lining plate 12, are mainly designed according to the overall size of the shell assembly.

[0151] For example, a plurality of mounting tables 112 can be provided on the edge of the rear shell 11, and the plurality of mounting tables 112 are distributed along the edge of the rear shell 11.

[0152] Correspondingly, a number of first through holes 121 corresponding to the mounting tables 112 are arranged on the lining plate 12, so as to connect and fix the rear shell 11 and the lining plate 12 by a plurality of screws.

[0153] Similarly, the number of clamping connections between the front shell 13 and the lining plate 12 is also provided with a plurality, which is not limited here.

[0154] By adopting the lining plate and indirectly connecting the front shell and the rear shell together, the lining plate and the rear shell are tightly connected together through the screw to meet the overall structural strength requirement of the shell, and the front shell is connected with the lining plate through the clamping mode, the front shell covers the lining plate and further shields the screw, so that the overall effect of the shell realizes the appearance effect of no screw exposed, the overall appearance of the shell is optimized, and the user experience is improved.

[0155] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0156] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions claimed by the present application.

Claims

1. An electric water heater comprising a shell, an inner container and an electric heating component, the inner container is arranged in the shell, a thermal insulation layer is arranged between the inner container and the shell, and the electric heating component is arranged on the inner container, characterized in that, The electric heating component is used for being mounted on the inner container and heating water stored in the inner container, wherein the inner container is in a flat structure; The electric heating component comprises a flange and an electric heating tube, the flange is used for being mounted on the inner container, the electric heating tube has a mounting portion, a supporting portion and an arc-shaped extending portion connected in sequence, the mounting portion is arranged on the flange, the mounting portion extends towards the inside of the inner container along the thickness direction of the inner container, the supporting portion extends downwards along the height direction of the inner container, and the arc-shaped extending portion is located at the bottom of the inner container and extends along the bottom of the inner container; The shell comprises a rear shell, a backing plate and a front shell, the edge of the rear shell is provided with a first screw hole, and the back of the rear shell forms a mounting surface; the edge of the backing plate is provided with a first through hole, and the outer surface of the backing plate is further provided with a first clamping portion; the inner surface of the front shell is provided with a second clamping portion; the backing plate is connected with the rear shell together, a screw passes through the first through hole and is threadedly connected in the corresponding first screw hole, the front shell covers the backing plate, and the first clamping portion is connected with the corresponding second clamping portion together; The first clamping portion comprises a clamping groove and a first positioning groove, and the second clamping portion comprises a clamping claw and a first plug; the clamping claw is clamped in the clamping groove, and the first plug is inserted in the first positioning groove; the outer surface of the backing plate is provided with a first guide sliding groove and a second guide sliding groove, the first guide sliding groove extends to the clamping groove, and the second guide sliding groove extends to the first positioning groove.

2. The electric water heater according to claim 1, wherein The supporting portion extends along the height direction of the inner container and is inclined towards one side of the inner container.

3. The electric water heater according to claim 2, wherein The arc-shaped extending portion extends along the bottom of the inner container from one side of the inner container to the other side of the inner container.

4. The electric water heater according to claim 3, wherein The cross section of the inner container perpendicular to the thickness direction is circular or elliptical, and the arc-shaped extending portions are symmetrically distributed along the perpendicular line of the center of the inner container.

5. The electric water heater according to claim 1, wherein The electric heating tube is in a meandering structure, and both ends of the electric heating tube are fixed on the flange.

6. The electric water heater according to claim 5, wherein The electric heating tube has two mounting portions arranged side by side, the electric heating tube has two supporting portions arranged side by side, the electric heating tube has two arc-shaped extending portions arranged side by side, and the two arc-shaped extending portions are connected together.

7. The electric water heater according to claim 6, wherein The two mounting portions are arranged in parallel with each other.

8. The electric water heater according to claim 6, wherein The two supporting portions are arranged side by side in a plane perpendicular to the thickness direction of the inner container, and the two arc-shaped extending portions are also arranged side by side in the plane perpendicular to the thickness direction of the inner container.

9. The electric water heater according to any one of claims 1 to 8, wherein The electric heating component comprises a plurality of electric heating tubes, and the plurality of electric heating tubes are arranged side by side.

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