Electric water heater

Abstract

The application discloses an electric water heater, comprising: a shell, an installation cavity and an electrical installation area are formed in the shell, a protective box is arranged in the electrical installation area; an inner container, the inner container forms a water storage cavity; an electric heating component, the electric heating component is used for heating by electrification; an electric control device, the electric control device comprises a power panel, a strong current element is arranged at one end of the power panel; wherein, the inner container is arranged in the shell and located in the installation cavity, the electric heating component is arranged in the inner container, the power panel is located in the electrical installation area, one end of the power panel is inserted in the protective box, and the strong current element is located in the protective box. By shielding the power panel locally, the size of the protective box is effectively reduced, and the manufacturing cost is reduced under the premise of meeting the use safety requirement.

Description

TECHNICAL FIELD

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

[0002] At present, a water heater is a household appliance commonly used in daily life, and the water heater is divided into types such as an electric water heater, an electric water heater, a heat pump water heater, and a solar water heater. The electric water heater is widely used due to its convenient use. Among them, the electric water heater can be divided into a storage type electric water heater and an instant type electric water heater according to the heating power, and the storage type electric water heater is purchased and used by more families due to the configuration of a water tank, which has characteristics such as large water outlet quantity and stable water temperature.

[0003] The water heater in the conventional technology generally has an outer shell, an inner tank, a heat preservation layer, and an electric control box. Among them, the electric control box is generally located at the end position of the outer shell and is integrated inside the outer shell. A power board is arranged in the electric control box, and strong current elements (such as relays) on the power board are prone to fire in the use process due to faults, and the power board generally needs to be protected. In general, a box body made of metal is arranged in the electric control box, and the power board is placed in the box body.

[0004] However, the box body is entirely made of metal material, which leads to an increase in manufacturing cost. In view of this, how to design an electric water heater technology with low manufacturing cost and high use safety is a technical problem to be solved by the present application. SUMMARY

[0005] The present application provides an electric water heater, which shields and protects the power board locally to effectively reduce the size of the protection box, thereby reducing the manufacturing cost under the premise of meeting the use safety requirement.

[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 water heater, comprising:

[0008] An outer shell, wherein an installation cavity and an electrical installation area are formed in the outer shell, and a protection box is arranged in the electrical installation area;

[0009] An inner tank, wherein a water storage cavity is formed in the inner tank;

[0010] An electric heating component, wherein the electric heating component is used for electric heating;

[0011] An electric control device, wherein the electric control device comprises a power board, and a strong current element is arranged at one end of the power board;

[0012] The inner container is arranged in the outer shell and located in the mounting cavity, the electric heating component is arranged in the inner container, one end of the power board is inserted into the protective box, and the strong current element is located in the protective box.

[0013] In an embodiment of the present application, one side of the protective box is provided with an insertion opening, and one end of the power board is inserted into the insertion opening.

[0014] In an embodiment of the present application, a mounting groove is arranged in the outer shell, and the mounting groove forms the electrical appliance mounting area.

[0015] The protective box comprises a box body and a box cover, the box body is clamped in the mounting groove, and the box cover covers the box body.

[0016] In an embodiment of the present application, a positioning clamping groove and a positioning clamping are arranged in the mounting groove, the edge of one end of the box body is clamped in the positioning clamping groove, and the positioning clamping is clamped at the other end of the box body.

[0017] In an embodiment of the present application, an insertion strip is arranged on the box body, an insertion hole is arranged on the box cover, a fixed plate is further arranged on the box cover and is arranged in a bent manner, a first fixed hole is formed in the fixed plate, the insertion strip is inserted into the corresponding insertion hole, a screw passes through the first fixed hole and is screw-connected in the mounting groove.

[0018] In an embodiment of the present application, one end of the box body is provided with a clamping groove, one end of the power board is inserted into the clamping groove, the other end of the power board is provided with a second fixed hole, a screw passes through the second fixed hole and is screw-connected in the mounting groove.

[0019] In an embodiment of the present application, a water blocking structure is further arranged in the outer shell, the water blocking structure is arranged at the upper part of the electrical installation area, and a drain hole is arranged at the bottom of the outer shell.

[0020] In an embodiment of the present application, the water blocking structure comprises a plurality of sub-water blocking structures, and the plurality of sub-water blocking structures are arranged in sequence from top to bottom.

[0021] In an embodiment of the present application, the outer shell comprises:

[0022] a rear shell;

[0023] a lining plate, an outer wall of the lining plate is provided with a plurality of first water guide ribs, the plurality of first water guide ribs are arranged in sequence from top to bottom, and the lining plate is further provided with the electrical installation area;

[0024] a front shell, an inner surface of the front shell is provided with a plurality of second water guide ribs, and the plurality of second water guide ribs are arranged in sequence from top to bottom.

[0025] The liner is connected to the rear shell to form an installation cavity, the front shell is disposed on the liner and covers the liner, and the first water guide rib and the second water guide rib cooperate to form the sub-water-blocking structure.

[0026] In one embodiment of this application, the liner is provided with water guide grooves at both ends of the first water guide rib, and the water guide grooves extend outward.

[0027] By arranging the high-voltage components on the power board at one end and using a protective box to shield only that end, the requirement of protecting the power board in case of a fire caused by a fault in the high-voltage components can be met. At the same time, since there is no need to protect the entire power board with a protective box, the overall size of the protective box is significantly reduced, thereby reducing the amount of metal materials used. By partially shielding the power board, the size of the protective box is effectively reduced, thus achieving a reduction in manufacturing costs while meeting the safety requirements. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of an embodiment of the waterproof outer shell of the present invention;

[0030] Figure 2 for Figure 1 A magnified view of a portion of region M in the middle;

[0031] Figure 3 This is a partial assembly structure diagram of an embodiment of the electric water heater of the present invention;

[0032] Figure 4 This is an exploded view of an embodiment of the electric water heater casing of the present invention;

[0033] Figure 5 Exploded view of the protective box in one embodiment of the electric water heater casing for the invention;

[0034] Figure 6 This is a schematic diagram of the liner plate in one embodiment of the electric water heater of the present invention;

[0035] Figure 7 This is a schematic diagram of the shell structure in one embodiment of the electric water heater of the present invention;

[0036] Figure 8 This is a schematic diagram of the front panel structure in one embodiment of the electric water heater of the present invention;

[0037] Figure 9 This is a cross-sectional view of another embodiment of the electric water heater of the present invention;

[0038] Figure 10 for Figure 9 A magnified view of a portion of region A in the middle;

[0039] Figure 11 for Figure 9 A magnified view of a portion of region B in the middle;

[0040] Figure 12 for Figure 9 A magnified view of a portion of region C.

[0041] Explanation of reference numerals in the attached figures:

[0042] Outer shell 1;

[0043] Electrical installation area 10;

[0044] Rear shell 11, first screw hole 111, mounting platform 112, second positioning groove 113, stepped surface 114, retaining rib 115;

[0045] Liner plate 12, first through hole 121, first snap-fit ​​part 122, second screw hole 123, first guide groove 124, second guide groove 125, positioning rib 126, extension edge 127, mounting groove 128;

[0046] Card slot 1221, first positioning slot 1222, positioning card slot 1281 and positioning card 1282;

[0047] First water guide rib 1201, water guide channel 1202, flow guide channel 1203;

[0048] Front shell 13, second snap-fit ​​part 130, shell 131, front panel 132, second through hole 133, groove 134, slot 135, second tongue 136, extension part 137;

[0049] Claw 1301, first tongue 1302, drain hole 1303, water guide plate 1311, second water guide rib 1321;

[0050] Mounting port 101, annular shielding part 102;

[0051] Inner liner 2;

[0052] Flange connection port 201, connecting bracket 202;

[0053] Electric heating component 3;

[0054] Electric control device 4;

[0055] Power panel 41;

[0056] Protective box 5;

[0057] Box body 51, box cover 52;

[0058] Plug strip 511, clamping groove 512, support slide rail 513, plug hole 521, fixing plate 522;

[0059] Hanger 100. DETAILED DESCRIPTION

[0060] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0061] It should be noted that, in the description of the present application, the terms of direction or position relationship such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is only 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 on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0062] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, 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 those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0063] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower in horizontal height than the second feature.

[0064] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the components and arrangements of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not itself indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0065] The electric water heater is a water heater that uses electric energy as the main energy material, generates high-temperature heat after being powered on, and directly heats the water stored in the electric water heater to achieve the purpose of preparing hot water.

[0066] The electric water heater generally includes a water tank, an electric heating component, and an electric control device, etc. Among them, 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, and the electric control device is used to control the on-off operation of the electric heating component to heat the water in the water tank to a set temperature.

[0067] For the water tank of the electric water heater, the water tank generally includes an outer shell and an inner container, and a thermal insulation layer is formed between the outer shell and the inner container. Among them, 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.

[0068] In addition, the thermal insulation layer formed between the outer shell and the inner container commonly uses thermal insulation materials such as asbestos, sponge, foamed plastic, and polyurethane foam. In conventional technology, in order to obtain good thermal insulation effect, the foaming method is usually used to form the thermal insulation layer.

[0069] Among them, 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 also arranged on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] For electronic control devices, they are used to receive detection signals sent by relevant sensors (such as water temperature sensors and flow sensors), and at the same time, control the power supply to and from the electric heating components.

[0074] When the electric water heater is working, the electric heating element is powered on by the electronic control device. When the water temperature in the tank reaches the set value, the electric heating element is powered off by the electronic control device.

[0075] Example 1, such as Figures 1-6 As shown, an electric water heater according to an embodiment of the present invention generally includes an outer shell 1, an inner tank 2, an electric heating element, and an electronic control device 4.

[0076] The inner tank forms a water storage cavity, the electric heating component is disposed in the inner tank and is used for electric heating, and the electrical control device includes a power board 41 and other electrical control boards and other electrical components, and a high-voltage component (not marked) is disposed at one end of the power board 41.

[0077] For the outer casing 1, it must meet the requirements of installing the inner liner 2 and the electrical control device 4. Therefore, an installation cavity and an electrical installation area are formed in the outer casing 1. A protective box 5 is provided in the electrical installation area. The power board 41 is located in the electrical installation area, and one end of the power board 41 is inserted into the protective box 5. The high-voltage components are located in the protective box 5.

[0078] Specifically, the power board 41 is arranged in sections for the electronic components mounted on it, with high-voltage components that are prone to ignition placed at one end of the power board 41. During assembly, the power board 41 is installed in the electrical installation area 10, and the corresponding end of the power board 41 with the high-voltage components is inserted into the protective box 5.

[0079] During use, if a high-voltage component catches fire due to a malfunction, the protective box 5 can prevent or reduce damage to other components, thus ensuring the reliability of the electric water heater.

[0080] In some embodiments, in order to facilitate the on-site assembly of the operator, an insertion opening (not labeled) can be provided on one side of the protection box 5, and one end of the power panel 41 is inserted into the insertion opening.

[0081] Specifically, the side of the protection box 5 is provided with an insertion opening to meet the quick installation requirement of the power panel by using the insertion opening. In this way, the operator can conveniently insert the power panel 41 into the protection box 5 from the insertion opening arranged on the side during assembly.

[0082] In some embodiments, in order to meet the installation requirement and the design requirement of thinning of the shell 1, the shell 1 is provided with a mounting groove 128, and the mounting groove 128 forms the electrical appliance mounting area; the protection box 5 includes a box body 51 and a box cover 52, the box body 51 is clamped in the mounting groove 128, and the box cover 52 covers the box body 51.

[0083] Specifically, the protection box 5 is composed of the box body 51 and the box cover 52 connected together, wherein the box body 51 is clamped in the mounting groove 128 to meet the quick installation requirement, and the box cover 52 covers the box body 51 to form a relatively closed fireproof space.

[0084] There are various ways for the clamping of the box body 51, for example, the positioning clamping groove 1281 and the positioning clamping 1282 can be arranged in the mounting groove 128, the edge of one end of the box body 51 is clamped in the positioning clamping groove 1281, and the positioning clamping 1282 is clamped at the other end of the box body 51.

[0085] Specifically, in the actual assembly process, the edge of the box body 51 is first inserted into the positioning clamping groove 1281, and then the other end of the box body 51 is clamped and fixed by the positioning clamping 1282 to complete the pre-assembly operation of the box body 51; then, the power panel 41 is inserted into the box body 51, and finally the box cover 52 is connected to the box body 51.

[0086] And for the fixing of the box cover 52, the insertion strip 511 can be arranged on the box body 51, the insertion hole 521 is arranged on the box cover 52, the fixing plate 522 is arranged on the box cover 52 and is bent, the first fixing hole (not labeled) is arranged on the fixing plate 522; the insertion strip 511 is inserted into the corresponding insertion hole 521, and the screw passes through the first fixing hole and is threadedly connected in the mounting groove 128.

[0087] Specifically, after the box body 51 is clamped in the mounting groove 128, the assembly of the power panel 41 and the box cover 52 is completed. And for the box cover 52, the screw can be further fastened on the shell 1 to meet the connection strength requirement and improve the connection reliability.

[0088] In another embodiment, one end of the box body 51 is provided with a clamping groove 512, one end of the power panel 41 is inserted into the clamping groove 512, and the other end of the power panel 41 is provided with a second fixing hole (not marked), and a screw passes through the second fixing hole and is screwed into the mounting groove 128.

[0089] Specifically, in order to facilitate the quick installation of the power panel 41 and reduce the amount of screws used, one end of the power panel 41 is clamped in the clamping groove 512, and the other end is fixed by a screw, which simplifies the assembly process, improves the assembly efficiency, and reduces the amount of screws used.

[0090] Preferably, support rails 513 can be provided on both sides of the box body 51, and the power panel 41 is first lapped on the support rails 513 and then inserted into the clamping groove 512, and after the other end of the power panel 41 is fixed by a screw, the support rails 513 can also support the middle of the power panel 41 to more reliably improve the connection reliability.

[0091] Embodiment two, based on the above embodiment one, as shown in Figures 1-12 In order to meet the waterproof installation requirements of the electric control device, an electrical installation area 10 can be formed in the shell 1, and a water blocking structure is arranged in the upper part of the electrical installation area 10, and a drain hole 1303 is arranged at the bottom of the shell 1.

[0092] Specifically, in the actual assembly process, the electric control device 4 is installed in the electrical installation area 10 provided in the shell 1, and the water blocking structure is arranged above the electrical installation area 10, so that the electric control device 4 below can be protected by the water blocking structure.

[0093] In actual use, the electric water heater using the shell 1 is generally hung on the wall of the bathroom for use. During bathing, some water may fall on the shell 1 due to splashing of the bathing water, and then the water may enter the inside of the shell 1 through the connection gap on the shell 1.

[0094] During the downward flow of the water infiltrated into the top of the shell 1, the water will first flow to the water blocking structure, and the water will flow to the sides under the blocking of the water blocking structure, thereby avoiding the water flowing directly to the electric control device 4 installed below the water blocking structure, to improve the waterproof effect of the shell 1 on the electric control device 4.

[0095] In some embodiments, in order to better improve the waterproof effect, the water blocking structure comprises a plurality of sub-water blocking structures, and the plurality of sub-water blocking structures are arranged from top to bottom.

[0096] Specifically, a plurality of sub-water retaining structures are arranged above the electrical installation area 10, and the plurality of sub-water retaining structures can achieve multiple waterproof effects above the electrical control device 4. At the same time, the sub-water retaining structures at different height positions can better prevent water from seeping at different height positions of the shell 1.

[0097] In an embodiment, in order to make the water entering the shell 1 flow smoothly to both sides of the electrical control device 4, the middle part of the sub-water retaining structure is higher than the two end parts.

[0098] Specifically, the middle part of the sub-water retaining structure forms an arch structure, and the two end parts of the sub-water retaining structure are lower in height. For the water flowing onto the sub-water retaining structure, the water can flow from the two end parts to the two sides of the shell 1 through the diversion of the sub-water retaining structure, so that the water can flow out smoothly.

[0099] In other embodiments, the shell 1 comprises:

[0100] a rear shell 11;

[0101] a lining plate 12, an outer wall of the lining plate is provided with a plurality of first water guide ribs 1201, the plurality of first water guide ribs 1201 are arranged in sequence from top to bottom, and the lining plate is further provided with an electrical installation area 10;

[0102] a front shell 13, an inner surface of the front shell is provided with a plurality of second water guide ribs 1321, the plurality of second water guide ribs 1321 are arranged in sequence from top to bottom;

[0103] The lining plate and the rear shell are connected together to form an installation cavity, the front shell is arranged on the lining plate and covers the lining plate, and the first water guide ribs 1201 and the second water guide ribs 1321 cooperate to form the sub-water retaining structure.

[0104] Specifically, the shell 1 is assembled by the rear shell 11, the lining plate 12, and the front shell 13. The electrical installation area 10 is formed on the lining plate 12. During assembly of the electric water heater, the inner container 2 is located in the installation cavity formed by the rear shell 11 and the lining plate 12, the electrical control device 4 is installed on the lining plate, and the front shell 13 is installed in the lining plate 12 and covers the electrical control device 4.

[0105] The first water guide ribs 1201 and the second water guide ribs 1321 cooperate to form the sub-water retaining structure after the front shell 13 is installed on the lining plate. Preferably, the first water guide ribs 1201 and the second water guide ribs 1321 form an overlapping area in the vertical direction, for example, the first water guide ribs 1201 can be located below the second water guide ribs 1321. When water seeps into the shell 1, the water will be sequentially blocked by the second water guide ribs 1321 and the first water guide ribs 1201, so as to minimize the water flowing directly to the electrical control device at the bottom.

[0106] In another embodiment, in order to better drain water to both sides of the shell 1, the lining plate is provided with a water guide groove 1202 at both ends of the first water guide rib 1201 respectively, and the water guide groove 1202 extends towards the outside.

[0107] Specifically, the water guide groove 1202 is arranged at both ends of the first water guide rib 1201 respectively, and water flows into the water guide groove 1202 through the first water guide rib 1201, and then is guided to both sides of the lining plate 12 by the water guide groove 1202, and finally flows to the bottom of the shell 1 under the action of gravity.

[0108] For the water guide groove 1202, it is arranged downwardly and obliquely towards the outside. Specifically, the water guide groove 1202 arranged in the cleaning arrangement can guide water to flow obliquely downward, which is more conducive to avoiding the water flowing downward from the electric control device.

[0109] In a preferred embodiment, the front shell comprises:

[0110] a front panel 132, the front panel being provided with a second water guide rib 1321;

[0111] a shell 131, the middle part of the shell being a hollow area, and the inner edge of the shell being provided with a water guide plate 1311 for cooperating with the water guide groove 1202;

[0112] The shell is arranged on the lining plate, the water guide plate 1311 is arranged in the water guide groove 1202, and the front panel is arranged on the shell and covers the hollow area of the shell.

[0113] Specifically, after the front shell is assembled on the lining plate, the water guide plate 1311 is arranged in the water guide groove 1202, and the water guide plate 1311 cooperates with the water guide groove 1202, so that water can flow from both sides of the lining plate and the shell respectively, to improve the water drainage efficiency. For the water guide plate 1311 in the water guide groove 1202, the water guide plate 1311 overlaps below the end of the first water guide rib 1201 at a corresponding height position. In this way, the water flowing from the end of the first water guide rib 1201 will directly flow onto the water guide plate 1311, so that the water flows downward along the inner wall of the shell; the remaining water flows downward along the outer wall of the lining plate through the water guide groove 1202, to disperse the water flow and improve the water drainage effect.

[0114] In an embodiment, the lining plate is provided with a flow guide groove 1203 for cooperating with the first water guide rib 1201, the flow guide groove 1203 is located above the corresponding first water guide rib 1201, and the second water guide rib 1321 is inserted into the corresponding flow guide groove 1203.

[0115] Specifically, the flow guide groove 1203 is recessed inwardly relative to the outer wall of the lining plate, so that the flow direction of water is further guided by the flow guide groove 1203, and the water blocking effect is further achieved.

[0116] By arranging the water blocking structure above the electrical installation area for installing electrical devices inside the shell, when water enters the shell due to the shower of bath water on the electric water heater during actual use, the water entering the shell flows downward due to gravity and is blocked by the water blocking structure, avoiding the water flowing directly into the electrical installation area to damage the electrical devices, and the water flows down from both sides of the electrical installation area under the guidance of the water blocking structure and finally flows out of the shell from the drain hole, thereby improving the waterproof effect to improve the use reliability of the electric water heater.

[0117] Based on the above embodiment one, it should be noted that the shell of the embodiment of the present application can be installed on a wall extending in the vertical direction, or can be installed on a wall extending in the horizontal direction.

[0118] For convenience of description, the structure of the shell will be described below with the shell being installed on a vertical wall as an example.

[0119] In the embodiment three, the shell 1 in the above embodiment one adopts a flat design, and the whole adopts an arc surface modeling design to achieve good appearance design effect.

[0120] In order to achieve the front visual screwless design, the shell 1 adopts the following structure design.

[0121] The edge of the rear shell 11 is provided with a first screw hole 111, and the back of the rear shell 11 forms a mounting surface;

[0122] The edge of the lining plate 12 is provided with a first through hole 121, and the outer surface of the lining plate 12 is further provided with a first clamping portion 122, the lining plate 12 forms a mounting port 101, and the inner wall of the lining plate 12 is provided with an annular shielding portion 102;

[0123] The inner surface of the front shell 13 is provided with a second clamping portion 130;

[0124] The lining plate 12 and the rear shell 11 are connected together, the screw passes through the first through hole 121 and is threadedly connected in the corresponding first screw hole 111, the front shell 13 covers the lining plate 12, and the first clamping portion 122 and the corresponding second clamping portion 130 are connected together.

[0125] The rear shell 11 and the backing plate 12 in the shell 1 are connected by screws, and a mounting cavity is formed between the rear shell 11 and the backing plate 12 to mount the inner container through the mounting cavity. The rear shell 11 and the backing plate 12 are fixed by screws, so that they have sufficient structural connection strength to meet the requirement of structural strength between the shell 1 and the inner container for foaming a thermal insulation layer later.

[0126] For the connection process between the rear shell 11 and the backing plate 12, the first through hole 121 is aligned with the corresponding first screw hole 111 after the rear shell 11 and the backing plate 12 are butted together, and then the screw is screwed into the first screw hole 111 through the first through hole 121. In this way, the rear shell 11 and the backing plate 12 are firmly and reliably connected together by the screw.

[0127] 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, the first through hole 121 on the backing plate 12 can be seen from the front of the shell 1, and 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.

[0128] For the connection process between the front shell 13 and the backing plate 12, 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 appearance effect of no exposed screw. Moreover, since the clamping connection part is shielded by the front shell 13, the appearance effect is optimized.

[0129] 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 as follows.

[0130] The second clamping part 130 includes a clamping jaw 1301, the first clamping part 122 includes a clamping groove 1221, and the clamping jaw 1301 is clamped in the clamping groove 1221.

[0131] Specifically, when the front shell 13 and the backing plate 12 are clamped and connected, the clamping jaw 1301 is clamped into the clamping groove 1221, and the clamping jaw 1301 and the clamping groove 1221 cooperate to connect the front shell 13 and the backing plate 12 together.

[0132] In order to improve the connection strength, the second clamping part 130 further comprises a first insertion tongue 1302, and the first clamping part 122 further comprises a first positioning slot 1222, and the first insertion tongue 1302 is inserted into the first positioning slot 1222.

[0133] Specifically, during assembly, the first insertion tongue 1302 is first inserted into the first positioning slot 1222 to preliminarily position the front shell 13 and the backing plate 12, and then the clamping paw 1301 is clamped in the clamping slot 1221 to complete the assembly of the front shell 13 and the backing plate 12.

[0134] The opening direction of the first positioning slot 1222 and the clamping slot 1221 is arranged in a reverse direction. In this way, the connection part formed by the clamping tongue and the clamping slot 1221 cooperates with the connection 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 backing plate 12.

[0135] In another embodiment, since the clamping paw 1301 and the first insertion tongue 1302 are both located on the inner wall of the front shell 13, during assembly, the inner wall of the front shell 13 cooperates with the outer wall of the backing plate 12, so that it is difficult for an operator to accurately insert the first insertion tongue 1302 into the positioning slot.

[0136] Therefore, the outer surface of the backing plate 12 can be provided with a first guide sliding groove 124 and a second guide sliding groove 125, the first guide sliding groove 124 extends to the clamping slot 1221, and the second guide sliding groove 125 extends to the positioning slot.

[0137] Specifically, during assembly, the operator can first place the clamping paw 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.

[0138] 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 paw 1301 is clamped in the clamping slot 1221.

[0139] Under the guidance of the first guide sliding groove 124 and the second guide sliding groove 125, the guide sliding grooves can cooperate with the first insertion tongue 1302 and the clamping paw 1301 to guide the sliding of the front shell 13.

[0140] Further, at the initial stage of installation, the front shell 13 and the backing plate 12 can be far apart, so as to facilitate the operator to observe the positions of the clamping paw 1301 and the first insertion tongue 1302, and further ensure that the clamping paw 1301 and the first insertion tongue 1302 are accurately placed in the corresponding guide sliding grooves.

[0141] Then, along with the sliding process of the guide slot, the distance between the front shell 13 and the lining plate 12 gradually becomes smaller, and the operator relies on the guiding effect of the guide slot to ensure that the first plug 1302 is first inserted into the first positioning groove 1222.

[0142] Finally, the pawl 1301 is clamped in the card slot 1221, so that the front shell 13 and the lining plate 12 are firmly connected together.

[0143] 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.

[0144] The shell 131 is provided with a second clamping part 130, and the shell 131 is also provided with a second through hole 133; wherein the lining plate 12 is also provided with a second screw hole 123, the screw passes through the second through hole 133 and is threadedly connected in the corresponding second screw hole 123, and the front panel 132 covers the second through hole 133 and is provided on the front panel 132.

[0145] Specifically, for the front shell 13, it adopts a split design, and the shell 131 is installed on the lining plate 12 by cooperating with the first clamping part 122 through the second clamping part 130. At the same time, the shell 131 and the lining plate 12 are further firmly connected together by the screw. And for the screw connecting the shell 131 and the lining plate 12, the front panel 132 is used to shield, so as to meet the appearance design requirement that there is no screw exposed on the front of the shell 1.

[0146] In an embodiment, the shell 131 is provided with a groove 134, and the second through hole 133 is located in the groove 134, and the front panel 132 is arranged in the groove 134.

[0147] Specifically, by arranging the groove 134 on the front of the shell 131, the front panel 132 is placed in the groove 134, so that the front of the shell 1 is more flat. At the same time, for the second through hole 133, the second through hole 133 is located in the groove 134, so that after the front panel 132 is assembled into the groove 134, the second through hole 133 can be shielded by the front panel 132.

[0148] In another embodiment, in order to realize the convenient and firm installation of the front panel 132 on the shell 131, the groove 134 is also provided with a slot 135, and the front panel 132 is provided with a second plug 136, which is arranged in the corresponding slot 135.

[0149] Specifically, after the shell 131 is installed on the backboard 12, the front panel 132 is inserted into the corresponding slot 135 through the plug on the front panel 132, so as to complete the installation. The plug and the slot 135 are matched with each other, so that the front surface of the shell 1 realizes the appearance effect of no exposed screws.

[0150] In order to further improve the connection reliability of the front panel 132, the extension 137 extending towards the backboard 12 is arranged on the front panel 132, the third screw hole (not shown) is arranged on the extension 137, the counterbore (not shown) is arranged on the shell 131, and the screw is screwed into the third screw hole through the counterbore.

[0151] Specifically, in order to meet the appearance design requirements, the extension 137 can be arranged on the upper part or the lower part of the front panel 132 according to the installation position of the shell 1. The extension 137 is arranged at the bottom of the front panel 132, and the counterbore is arranged at the bottom of the shell 131. After the front panel 132 is clamped and connected through the cooperation of the plug and the slot 135, the front panel 132 is further connected and fixed from the bottom through the screw.

[0152] Preferably, the detachable plug (not shown) can also be arranged on the counterbore. After the front panel 132 is fixed on the shell 131 through the screw, the plug is used to cover the screw in the counterbore, so as to further meet the design of no exposed screws on the front surface of the shell 1.

[0153] In some embodiments, in order to facilitate the operator to quickly assemble the backboard 12 and the rear shell 11 on site, the inner wall of the rear shell 11 is provided with the mounting table 112, and the first threaded hole is arranged on the mounting table 112.

[0154] Specifically, during the assembly process, the mounting table 112 can support and position the backboard 12, so as to facilitate the operator to quickly connect and assemble the backboard 12 and the rear shell 11 together.

[0155] In another embodiment, in order to facilitate the positioning and assembly of the rear shell 11 and the backboard 12, the second positioning groove 113 can be arranged on the mounting table 112, and the edge of the backboard 12 is clamped in the second positioning groove 113.

[0156] Specifically, during the assembly of the rear shell 11 and the backboard 12, the edge of the backboard 12 can be inserted into the second positioning groove 113 first, so that the rear shell 11 and the backboard 12 are pre-assembled together.

[0157] Then, the relative position between the rear shell 11 and the backboard 12 is adjusted, so that the first through hole 121 is aligned with the first screw hole 111.

[0158] Finally, the screw is threaded through the first through hole 121 and screwed into the first screw hole 111, so that the rear shell 11 and the backing plate 12 are firmly and reliably assembled together.

[0159] In order to accurately position the position relationship between the rear shell 11 and the backing plate 12, the inner wall of the rear shell 11 is provided with a stepped surface 114, and the outer wall of the backing plate 12 is provided with a positioning rib 126 abutting against the stepped surface 114.

[0160] Specifically, in the process of assembling the rear shell 11 and the backing plate 12, reference is made to the above-mentioned pre-positioning process through the positioning groove, so that the rear shell 11 and the backing plate 12 are pre-assembled together. At the same time, after the edge of the backing plate 12 is inserted into the positioning groove, the positioning rib 126 on the backing plate 12 will abut against the stepped surface 114, thereby accurately positioning the rear shell 11 and the backing plate 12, to improve the overall assembly quality of the shell assembly.

[0161] In an embodiment, the edge of the rear shell 11 is further provided with a blocking rib 115 located outside the stepped surface 114, and the edge of the front shell 13 is provided with an extension edge 127 surrounding the outside of the blocking rib 115.

[0162] Specifically, the front shell 13 can cover the entire outer surface of the backing plate 12, and the front shell 13 can cover the backing plate 12 as a whole outside the backing 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 in cooperation with the extension edge 127 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.

[0163] In a preferred embodiment, for the butt joint region 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 region of the front shell 13 and the rear shell 11.

[0164] In addition, the number of connection parts between the rear shell 11 and the backing plate 12, and the number of connection parts between the front shell 13 and the backing plate 12, are mainly designed in correspondence with the overall size of the shell assembly.

[0165] For example, a plurality of mounting platforms 112 can be provided on the edge of the rear shell 11, and the plurality of mounting platforms 112 are distributed along the edge of the rear shell 11.

[0166] Correspondingly, the backing plate 12 is provided with a number of first through holes 121 corresponding to the number of mounting platforms 112, so as to connect and fix the rear shell 11 and the backing plate 12 by means of a plurality of screws.

[0167] Similarly, the number of clamping connections between the front shell 13 and the backing plate 12 is also provided with multiple, not limited here.

[0168] By adopting the backing plate and connecting the front shell and the rear shell together, the backing plate and the rear shell are tightly connected together through screws to meet the overall structural strength requirements of the shell, and the front shell is connected with the backing plate through clamping, the front shell covers the backing plate and blocks the screws, so that the overall effect of the shell realizes the appearance effect of no exposed screws, and the overall appearance of the shell is optimized to improve the user experience.

[0169] In the above embodiment three, based on the flat structure of the shell 1, the present application also provides an electric water heater, which uses a water tank adopting a flat design to reduce the effective space occupied by the electric water heater in the room, and the water tank comprises a shell 1, an inner container 2 and an electric heating component 3 assembled together.

[0170] Among them, since the shell 1 and the inner container 2 are both flat structures, correspondingly, the following structural improvements are made to the shell 1, the inner container 2 and the electric heating component 3.

[0171] The front part of the shell 1 is provided with a mounting port 101, and the inner wall of the shell 1 is also provided with an annular shielding part 102 which is arranged around the mounting port 101.

[0172] The inner container, the front part of the inner container 2 is provided with a flange connection port 201.

[0173] Among them, the inner container 2 is located in the shell 1, the annular shielding part 102 surrounds the outer side of the flange connection port 201, a heat preservation layer (not shown) is arranged between the shell 1 and the inner container 2, and the electric heating component 3 is arranged on the flange connection port 201 and extends into the inner container 2.

[0174] Specifically, the water tank as a whole adopts a flat design, 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 at the same time, to meet the later maintenance requirements of the electric heating component 3, the front part of the shell 1 is configured with a mounting port 101, and correspondingly, the front part of the inner container 2 is configured with a flange connection port 201.

[0175] When the electric heating component 3 needs to be assembled, the electric heating component 3 can be inserted from the mounting port 101 and extended into the inner container 2 through the flange connection port 201 to complete the assembly. Similarly, when the electric heating component 3 needs to be replaced and maintained later, the electric heating component 3 can be disassembled from the inner container 2 through the mounting port 101 and taken out conveniently.

[0176] At the same time, for the water tank with a flat structure, the electric heating component 3 is installed at the front part of the inner container 2, so as to fully utilize the area of the front surface of the inner container 2 to firmly and reliably install the electric heating component 3.

[0177] More importantly, in order to reduce or avoid overflow of the foaming material from the flange connecting port 201 of the inner container 2 during foaming, an annular shielding portion 102 extending towards the flange connecting port 201 is formed on the inner wall of the outer shell 1. The annular shielding portion 102 is in a cylindrical structure as a whole and surrounds the periphery of the mounting port 101. After the inner container 2 is installed in the outer shell 1, the annular shielding portion 102 will surround the periphery of the flange connecting port 201, thereby forming a region between the annular shielding portion 102 and the flange connecting port 201 for blocking the leakage of the foaming material.

[0178] 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, the foaming material can be blocked by the annular shielding portion 102 when flowing to the flange connecting port 201, thereby reducing the leakage of the foaming material from the flange connecting port 201.

[0179] In some embodiments, in order to improve the effect of preventing overflow, the edge of the annular shielding portion 102 abuts against the outer wall of the inner container 2.

[0180] Specifically, after the inner container 2 is installed in the outer shell 1, the edge of the annular shielding portion 102 abuts against the outer wall of the inner container 2. In this way, during the foaming process, the leakage of the foaming material from the flange connecting port 201 can be better blocked by the annular shielding portion 102.

[0181] In a preferred embodiment, in order to facilitate assembly, a gap is formed between the edge of the annular shielding portion 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 portion (not shown) can be arranged outside the annular shielding portion 102, which blocks the gap.

[0182] Specifically, during assembly, the first flexible sealing portion is first wound outside the annular shielding portion 102 and extends to the edge of the annular shielding portion 102. After the inner container 2 is installed in the outer shell 1, the first flexible sealing portion can be deformed due to its elasticity and abuts tightly against the outer wall of the inner container 2, so as to effectively seal the gap formed between the annular shielding portion 102 and the inner container 2 by the first flexible sealing portion.

[0183] Similarly, a second flexible sealing portion can also be arranged outside the flange connecting port 201, which blocks the gap.

[0184] Specifically, during the assembling process, the second flexible sealing part 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 part 102 is pressed on the second flexible sealing part, so as to effectively seal the gap between the annular shielding part 102 and the inner container 2 through the second flexible sealing part.

[0185] In actual use, the specific performance entity of the flexible sealing part can be a rubber cotton or a sealing ring, which is not limited here.

[0186] In another embodiment, in order to better block the foaming material flowing to the flange connecting port 201 by the annular shielding part 102, the outer diameter of the annular shielding part 102 gradually decreases from the mounting port 101 to the flange connecting port 201.

[0187] Specifically, the cross section of the annular shielding part 102 is a horn structure, the opposite end of the annular shielding part 102 to the inner container 2 has a smaller size, and the outer wall of the annular shielding part 102 forms an inclined surface. On the one hand, the smaller end port blocks the overflow of the foaming material, and on the other hand, the inclined outer wall ensures that the foaming material can flow along it to uniformly distribute the foaming material outside the inner container 2.

[0188] 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 the foaming process, a connecting frame 202 is arranged on the back of the inner container 2, and threaded holes (not labeled) are arranged on the connecting frame 202. Correspondingly, a hanging frame 100 is arranged on the back of the outer shell 1, and mounting holes (not labeled) are arranged on the hanging frame 100; a bolt passes through the mounting holes and extends into the outer shell 1 and is screwed into the threaded holes, and the connecting frame 202 abuts against the inner wall of the outer shell 1.

[0189] Specifically, after the inner container 2 is installed into the outer shell 1, the inner container 2 is fixed on the outer shell 1 through the connecting frame 202, and at the same time, the connecting frame 202 is connected with the hanging frame 100 through the bolt, which also serves as a mounting function of the hanging frame 100.

[0190] In another embodiment, for the outer shell 1 to form the mounting port 101 at the front, in order to optimize the appearance, the front panel 132 arranged at the front of the outer shell 1 can be used for shielding. In normal use, the front panel 132 is fixed on 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 132 is removed.

[0191] The mounting hole is arranged on the front part of the shell to meet the mounting and later maintenance requirements of the electric heating component, and meanwhile, the inner part of the shell is further formed with an annular shielding part extending towards the inner side and surrounding the flange connecting hole of the inner container. Since the annular shielding part cooperates with the front surface of the inner container, the flange connecting hole can be better prevented from material overflow. Thus, during the foaming process, the foaming material flowing into the space between the shell and the inner container can be blocked by the annular shielding part when flowing to the flange connecting hole of the inner container, so as to reduce the overflow of the foaming material and improve the foaming quality and product quality.

[0192] 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" 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.

[0193] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can still be modified by those skilled in the art, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make 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, characterised in that, The utility model relates to a water heater, including: A shell is formed with a mounting cavity and an electrical mounting area in the shell, and a protective box is arranged in the electrical mounting area; A liner forms a water storage cavity; An electric heating component is used for electric heating; An electric control device includes a power panel, and one end of the power panel is provided with a strong electric element; The liner is arranged in the shell and located in the mounting cavity, the electric heating component is arranged in the liner, the power panel is located in the electrical mounting area, one end of the power panel is inserted into the protective box, and the strong electric element is located in the protective box; A water retaining structure is further arranged in the shell, the water retaining structure is arranged at the upper part of the electrical mounting area, and the water retaining structure includes a plurality of sub-water retaining structures, and the plurality of sub-water retaining structures are arranged in sequence from top to bottom; The shell includes a rear shell, a lining plate and a front shell, an outer wall of the lining plate is provided with a plurality of first water guide ribs arranged in sequence from top to bottom, and the lining plate is further provided with the electrical mounting area; an inner surface of the front shell is provided with a plurality of second water guide ribs arranged in sequence from top to bottom; the lining plate and the rear shell are connected together to form a mounting cavity, the front shell is arranged on the lining plate and covers the lining plate, the first water guide ribs and the second water guide ribs cooperate to form a sub-water retaining structure, and an overlapping area is formed between the first water guide ribs and the second water guide ribs in the vertical direction; the lining plate is provided with a water guide groove at each end of the first water guide ribs, and the water guide groove extends towards the outside.

2. The electric water heater according to claim 1, wherein One side of the protective box is provided with an insertion opening, and one end of the power panel is inserted into the insertion opening.

3. The electric water heater according to claim 2, wherein The shell is provided with a mounting groove, and the mounting groove forms the electrical mounting area; The protective box includes a box body and a box cover, the box body is clamped in the mounting groove, and the box cover covers the box body.

4. The electric water heater according to claim 3, wherein The mounting groove is provided with a positioning clamping groove and a positioning clamp, an edge of one end of the box body is clamped in the positioning clamping groove, and the positioning clamp is clamped at the other end of the box body.

5. The electric water heater according to claim 4, wherein The box cover is further provided with a fixed plate arranged in a bent mode, the fixed plate is provided with a first fixing hole, the insertion strip is inserted into the corresponding insertion hole, a screw passes through the first fixing hole and is screw-connected in the mounting groove.

6. The electric water heater according to claim 3, wherein One end of the box body is provided with a clamping groove, one end of the power panel is inserted into the clamping groove, the other end of the power panel is provided with a second fixing hole, a screw passes through the second fixing hole and is screw-connected in the mounting groove.

7. The electric water heater according to any one of claims 1 to 6, wherein The bottom of the shell is provided with a drain hole.

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