Thermal water tank and electric water heater

Abstract

The application discloses a heat preservation water tank and an electric water heater. The heat preservation water tank comprises a shell, a mounting opening is arranged on the front or rear part of the shell, an annular shielding part is further arranged on the inner wall of the shell, and the annular shielding part is arranged around the mounting opening; an inner container is arranged on the shell, a flange connecting opening is arranged on the inner container; an electric heating part; wherein the inner container is located in the shell, the annular shielding part surrounds the outer side of the flange connecting opening, a heat preservation layer is arranged between the shell and the inner container, and the electric heating part is arranged on the flange connecting opening and extends into the inner container. The application realizes the reduction of foaming material overflow, so as to improve the product quality.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of household appliances, and particularly relates to a heat-preservation water tank 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 types such as electric water heaters, electric water heaters, heat pump water heaters and solar water heaters. The electric water heater is widely used because of 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 because it is configured with a water tank and has the characteristics of large water outlet and stable water temperature.

[0003] The water heater in the conventional technology usually adopts a cylindrical structure, an electric heating pipe is installed at the end of the end cover position of the inner container, and foaming material is filled between the outer shell and the inner container to form a heat preservation layer. With the continuous progress of technology, the flat type water tank is widely used due to its smaller space occupation. For example, the Chinese patent No. 201920635175.8 discloses an electric water heater, and the outer shell and the inner container both adopt a flat structure. However, due to the limitation of the flat structure, since the end of the inner container is a non-circular structure, the foaming material is easy to overflow during the foaming process, resulting in poor foaming effect.

[0004] In view of this, how to design a technology for reducing foaming material overflow to improve product quality is a technical problem to be solved by the present application. SUMMARY

[0005] The present application provides a heat-preservation water tank and an electric water heater, which can reduce foaming material overflow and improve product quality.

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

[0007] In one aspect, the present application provides a heat-preservation water tank, comprising:

[0008] An outer shell, a front part or a rear part of the outer shell is provided with a mounting port, and an inner wall of the outer shell is further provided with an annular shielding part, which is arranged around the mounting port;

[0009] An inner container, the inner container is of a flat structure, and the inner container is provided with a flange connection port;

[0010] An electric heating component;

[0011] The inner container is located in the outer shell, the annular shielding part surrounds the outer side of the flange connection port, a heat preservation layer is arranged between the outer shell and the inner container, and the electric heating component is arranged on the flange connection port and extends into the inside of the inner container.

[0012] In an embodiment of the present application, the annular shielding portion extends towards the flange connection port.

[0013] In an embodiment of the present application, the outer diameter of the annular shielding portion gradually decreases along the direction from the mounting port to the flange connection port.

[0014] In an embodiment of the present application, a gap is formed between the edge of the annular shielding portion and the outer wall of the inner container.

[0015] In an embodiment of the present application, a first flexible sealing portion is further arranged outside the annular shielding portion, and the first flexible sealing portion shields the gap.

[0016] In an embodiment of the present application, a second flexible sealing portion is arranged outside the flange connection port, and the second flexible sealing portion shields the gap.

[0017] In an embodiment of the present application, the edge of the annular shielding portion abuts against the outer wall of the inner container.

[0018] In an embodiment of the present application, the back of the outer shell is provided with a hanger, and the hanger is provided with a mounting hole; the back of the inner container is provided with a connecting bracket, and the connecting bracket is provided with a threaded hole; a bolt passes through the mounting hole and is screwed into the threaded hole in the outer shell, and the connecting bracket abuts against the inner wall of the outer shell.

[0019] In an embodiment of the present application, a detachable front panel is further arranged on the outer shell, and the front panel covers the mounting port.

[0020] In an embodiment of the present application, the thickness of the outer shell is smaller than the length and height of the outer shell, and the back of the outer shell forms a mounting surface; the cross section of the outer shell perpendicular to the length or height direction has a first line segment, a second line segment, a third line segment and a fourth line segment connected in sequence, the first line segment and the third line segment are arranged opposite to each other, and the second line segment and the fourth line segment are arranged opposite to each other; wherein, the first line segment is arranged on the mounting surface, and the curvature of the first line segment is smaller than the curvature of the second line segment and the fourth line segment.

[0021] In another aspect, the present application provides an electric water heater comprising the above-mentioned thermal insulation water tank.

[0022] By configuring mounting ports at the front or rear of the outer shell, the requirements for installing electric heating components on the flat inner liner and subsequent maintenance are met. At the same time, an inwardly extending annular baffle is formed around the mounting port inside the outer shell. The annular baffle surrounds the flange connection port of the inner liner. Since the annular baffle 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 baffle, thereby reducing the overflow of foaming material and improving the foaming quality, thus improving the product quality. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the water tank in Embodiment 1 of the electric water heater of the present invention;

[0025] Figure 2 This is an exploded view of the water tank in the electric water heater of the present invention, according to Embodiment 1.

[0026] Figure 3 This is a cross-sectional view of the water tank in the electric water heater of the present invention, according to Embodiment 1.

[0027] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0028] Figure 5 for Figure 3 A magnified view of a portion of region B in the middle;

[0029] Figure 6 This is a schematic diagram of the front panel structure in Embodiment 1 of the water tank of the electric water heater of the present invention;

[0030] Figure 7 This is a cross-sectional view of Embodiment 2 of the electric water heater water tank of the present invention.

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

[0032] Outer shell 1;

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

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

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

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

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

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

[0039] Inner container 2;

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

[0041] Electric heating component 3;

[0042] First line segment a, second line segment b, third line segment c, fourth line segment d;

[0043] Hanger 100. DETAILED DESCRIPTION

[0044] To make the objectives, 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 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 "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 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.

[0046] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and the like, should be construed broadly, for example, can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled 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 specifically defined and limited otherwise, 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 "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 is "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 following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. 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 numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not 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.

[0049] 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.

[0050] The electric water heater generally includes a water tank, an electric heating component, and an electric control board, 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 board 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.

[0051] For the water tank of the electric water heater, the water tank generally includes an outer shell and an inner container, and a heat preservation 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.

[0052] In addition, the insulation layer formed between the outer shell and the inner liner is commonly made of materials such as asbestos, sponge, foam plastic, and polyurethane foam. In conventional technology, foaming is usually used to form the insulation layer in order to achieve good insulation effect.

[0053] For water tanks with metal inner liner, corrosion can easily occur inside due to water quality. Therefore, magnesium rods are installed on the water tank and inserted into the water storage cavity inside the tank.

[0054] 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.

[0055] 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.

[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] The present invention relates to a housing for an electric water heater. It should be noted that the housing of the present invention 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 the outer casing being installed on a vertical wall to illustrate the structure of the outer casing.

[0061] Example 1, such as Figures 1-6 As shown, the present invention also provides an insulated water tank for use in electric water heaters. The water tank adopts a flat design to reduce the effective indoor space occupied by the electric water heater. The insulated water tank includes an outer shell 1, an inner tank 2, and an electric heating element 3 assembled together. Since both the outer shell 1 and the inner tank 2 are flat structures, the following structural improvements are made to the outer shell 1, the inner tank 2, and the electric heating element 3.

[0062] The front or rear of the shell 1 is provided with a mounting port 101, and the inner wall of the shell 1 is further provided with an annular shielding portion 102 which is arranged around the mounting port 101.

[0063] The inner container is provided with a flange connecting port 201 on the inner container 2.

[0064] The inner container 2 is located in the shell 1, the annular shielding portion 102 surrounds the outer side of the flange connecting port 201, a thermal insulation 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 connecting port 201 and extends into the inner container 2.

[0065] Specifically, the water tank as a whole adopts a flattened 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, at the same time, the requirements of the later maintenance of the electric heating component 3 also need to be met, and the mounting port needs to be arranged on the front or rear of the shell 1. Taking the case that the mounting port 101 is arranged on the front of the shell 1 as an example, the corresponding flange connecting port 201 is arranged on the front of the inner container 2.

[0066] When the electric heating component 3 needs to be assembled, the electric heating component 3 can be inserted from the mounting port 101 and extend into the inner container 2 through the flange connecting 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.

[0067] At the same time, for the water tank with a flat structure, the electric heating component 3 is installed on the front 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.

[0068] More importantly, in order to reduce or avoid overflow of the foaming material around the flange connecting port 201 of the inner container 2 during foaming, the annular shielding portion 102 extending towards the flange connecting port 201 is formed on the inner wall of the shell 1, and the annular shielding portion 102 as a whole has a cylindrical structure and surrounds the periphery of the mounting port 101. After the inner container 2 is installed in the shell 1, the annular shielding portion 102 will surround the periphery of the flange connecting port 201, and then a region for blocking the leakage of the foaming material is formed between the annular shielding portion 102 and the flange connecting port 201.

[0069] The foaming cavity is formed between the shell 1 and the inner container 2, and 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.

[0070] 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.

[0071] Specifically, after the inner container 2 is installed into the outer shell 1, the edge of the annular shielding portion 102 is attached to the outer wall of the inner container 2, so that the annular shielding portion 102 can better block the foaming material from leaking from the flange connecting port 201 during the foaming process.

[0072] In the preferred embodiment, a gap is formed between the edge of the annular shielding portion 102 and the outer wall of the inner container 2 for facilitating assembly. Further, a first flexible sealing portion (not shown) can be arranged outside the annular shielding portion 102 to block the gap.

[0073] Specifically, during assembly, the first flexible sealing portion is 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 into the outer shell 1, the first flexible sealing portion is deformed due to its elasticity and tightly abuts against the outer wall of the inner container 2, so as to effectively seal the gap between the annular shielding portion 102 and the inner container 2 by the first flexible sealing portion.

[0074] Similarly, a second flexible sealing portion can also be arranged outside the flange connecting port 201 to block the gap.

[0075] Specifically, during assembly, the second flexible sealing portion is 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 due to its elasticity, so as to effectively seal the gap between the annular shielding portion 102 and the inner container 2 by the second flexible sealing portion.

[0076] In actual use, the specific performance entity of the flexible sealing portion can be a rubber cotton or a sealing gasket, which is not limited or described herein.

[0077] In another embodiment, 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.

[0078] 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 one hand, the smaller end can block the foaming material from overflowing, and on the other hand, the inclined surface can ensure that the foaming material flows along it to uniformly distribute the foaming material outside the inner container 2.

[0079] In some embodiments, in order to effectively position the inner container 2 in the shell 1 before foaming, so as to avoid the inner container 2 from being offset in the 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 shell 1, and mounting holes (not labeled) are arranged on the hanging frame 100; bolts pass through the mounting holes and are screwed into the threaded holes in the shell 1, and the connecting frame 202 abuts against the inner wall of the shell 1.

[0080] Specifically, after the inner container 2 is loaded into the shell 1, the inner container 2 is fixed on the 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 bolts, and simultaneously plays a role of mounting the hanging frame 100.

[0081] In another embodiment, a mounting port 101 is formed on the front of the shell 1, and in order to optimize the appearance, the mounting port 101 can be shielded by a front panel 132 arranged on the front of the shell 1. During normal use, the front panel 132 is fixed on the front of the 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.

[0082] By arranging the mounting port on the front of the shell to meet the requirements of mounting and later repair of the electric heating component, and at the same time, an annular shielding portion extending inward is formed on the inside of the shell around the mounting port, the annular shielding portion surrounds the outer periphery of the flange connecting port of the inner container, and due to the cooperation between the annular shielding portion and the front surface of the inner container, the annular shielding portion can better prevent overflow of the flange connecting port. Thus, during the foaming process, after the foaming material flows into the space between the shell and the inner container, the foaming material flowing to the flange connecting port of the inner container can be blocked by the annular shielding portion, so as to reduce overflow of the foaming material, and thus improve the foaming quality and product quality.

[0083] Based on the above-mentioned embodiment one, the shell 1 of the embodiment of the present application has the following structural design.

[0084] Embodiment two, as shown in Figures 2-6 For the shell 1 in the above-mentioned embodiment one, a flattened design is adopted, and the whole adopts an arc surface modeling design to achieve a good appearance design effect.

[0085] In order to achieve a front visual screwless design, the shell 1 adopts the following structural design.

[0086] The shell 1 comprises:

[0087] A rear shell 11, an edge of the rear shell 11 is provided with a first screw hole 111, and a mounting surface is formed on the back of the rear shell 11;

[0088] The gusset plate 12 is provided with a first through hole 121 at the edge thereof, and a first clamping portion 122 is further provided on the outer surface of the gusset plate 12. An installation opening 101 is formed on the gusset plate 12, and an annular shielding portion 102 is provided on the inner wall of the gusset plate 12.

[0089] The front shell 13 is provided with a second clamping portion 130 on the inner surface thereof.

[0090] The gusset plate 12 is connected with the rear shell 11, a screw passes through the first through hole 121 and is screwed into the corresponding first screw hole 111, and the front shell 13 covers the gusset plate 12, and the first clamping portion 122 is connected with the corresponding second clamping portion 130.

[0091] The rear shell 11 and the gusset plate 12 in the outer shell 1 are connected by screws, and an installation cavity is formed between the rear shell 11 and the gusset plate 12 to install the inner container through the installation cavity. The rear shell 11 and the gusset plate 12 are connected and fixed by screws, so that they have sufficient structural connection strength directly to meet the requirement of structural strength for foaming a heat preservation layer between the outer shell 1 and the inner container later.

[0092] For the connection process between the rear shell 11 and the gusset plate 12, the first through hole 121 is aligned with the corresponding first screw hole 111 after the rear shell 11 and the gusset plate 12 are butted together, and then a screw passes through the first through hole 121 and is screwed into the first screw hole 111. In this way, the rear shell 11 and the gusset plate 12 are firmly and reliably connected together by the screw.

[0093] In order to achieve the appearance effect of no exposed screw, the front shell 13 is installed on the gusset plate 12 by clamping. Specifically, after the rear shell 11 and the gusset plate 12 are fixedly connected together, since the first through hole 121 on the gusset plate 12 can be seen from the front of the outer 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.

[0094] For the connection process between the front shell 13 and the gusset plate 12, the second clamping portion 130 on the front shell 13 is clamped with the first clamping portion 122 at the corresponding position on the gusset plate 12 to achieve clamping of the front shell 13 on the gusset plate 12. At the same time, the first through hole 121 is shielded by the front shell 13, so that the outer shell assembly cannot see the first through hole 121 from the outside, achieving the appearance effect of no exposed screw. Moreover, since the clamping is adopted, the clamping connection part is shielded by the front shell 13 to optimize the appearance effect.

[0095] In some embodiments, the specific performance entity of the first clamping portion 122 and the second clamping portion 130 can adopt various structural forms, which are illustrated below.

[0096] The second clamping part 130 comprises a clamping jaw 1301, and the first clamping part 122 comprises a clamping slot 1221, and the clamping jaw 1301 is clamped in the clamping slot 1221.

[0097] Specifically, when the front shell 13 is clamped and connected with the backing plate 12, the clamping jaw 1301 is clamped into the clamping slot 1221, and the clamping jaw 1301 and the clamping slot 1221 are matched with each other to connect the front shell 13 and the backing plate 12 together.

[0098] 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.

[0099] 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 jaw 1301 is clamped into the clamping slot 1221 to complete the assembly between the front shell 13 and the backing plate 12.

[0100] The opening direction of the first positioning slot 1222 and the clamping slot 1221 is arranged in a back-to-back manner. In this way, the connection part formed by the clamping jaw 1301 and the clamping slot 1221 and the connection part formed by the first insertion tongue 1302 and the first positioning slot 1222 are matched with each other, so that the front shell 13 can be more firmly and reliably mounted and fixed on the outer wall of the backing plate 12.

[0101] 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, during assembly, the inner wall of the front shell 13 and the outer wall of the backing plate 12 are matched with each other, so that it is difficult for an operator to accurately insert the first insertion tongue 1302 into the positioning slot.

[0102] 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.

[0103] Specifically, during assembly, 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.

[0104] Then, the operator slides the front shell 13 along the first guide sliding groove 124 and the second guide sliding groove 125 to accurately insert the first insertion tongue 1302 into the first positioning slot 1222, and finally clamps the clamping jaw 1301 in the clamping slot 1221.

[0105] Under the guidance of the first guide slot 124 and the second guide slot 125, the guide slot can cooperate with the first plug 1302 and the clamping jaw 1301 to guide the front shell 13 to slide.

[0106] Further, at the initial stage of installation, the front shell 13 can be far away from the lining plate 12 to facilitate the operator to observe the position of the clamping jaw 1301 and the first plug 1302, thereby ensuring that the clamping jaw 1301 and the first plug 1302 are accurately placed in the corresponding guide slot.

[0107] Then, during the sliding process along 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 action of the guide slot to ensure that the first plug 1302 is inserted into the first positioning groove 1222 first.

[0108] Finally, the clamping jaw 1301 is clamped in the clamping groove 1221, so that the front shell 13 and the lining plate 12 are firmly connected together.

[0109] 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.

[0110] The front shell 13 comprises:

[0111] a front panel 132;

[0112] a shell body 131, the shell body 131 being provided with a second clamping part 130, and the shell body 131 being further provided with a second through hole 133;

[0113] The lining plate 12 is further provided with a second screw hole 123, a 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 arranged on the front panel 132.

[0114] Specifically, for the front shell 13, a split design is adopted, the shell body 131 is arranged 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 body 131 and the lining plate 12 are further firmly connected by the screw. For the screw connecting the shell body 131 and the lining plate 12, the front panel 132 is used to shield the screw to meet the appearance design requirement that no screw is exposed on the front of the shell 1.

[0115] In an embodiment, the shell body 131 is provided with a recess 134, the second through hole 133 is located in the recess 134, and the front panel 132 is arranged in the recess 134.

[0116] Specifically, by arranging the recess 134 on the front surface of the shell 131, the front panel 132 is placed in the recess 134, so that the front surface of the shell 1 is more flat. Meanwhile, for the second through hole 133, the second through hole 133 is located in the recess 134, so that after the front panel 132 is assembled into the recess 134, the second through hole 133 can be covered by the front panel 132.

[0117] In another embodiment, in order to realize the convenient and reliable installation of the front panel 132 on the shell 131, the recess 134 is further provided with a slot 135, and the front panel 132 is provided with a second plug 136 arranged in the corresponding slot 135.

[0118] Specifically, after the shell 131 is installed on the lining plate 12, the front panel 132 is inserted into the corresponding slot 135 through the plug arranged thereon, so as to complete the installation. The plug and the slot 135 cooperate with each other, so that the front surface of the shell 1 realizes the appearance effect of no exposed screws.

[0119] Among them, in order to further improve the connection reliability of the front panel 132, the front panel 132 is provided with an extension 137 extending towards the lining plate 12, and the extension 137 is provided with a third screw hole (not shown), and the shell 131 is provided with a counterbore (not shown), and the screw is screwed into the third screw hole through the counterbore.

[0120] Specifically, in order to meet the requirements of appearance design, according to the different installation positions of the shell 1, the extension 137 can be arranged on the upper part or the lower part of the front panel 132. The extension 137 is formed 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 connected and fixed by the plug and the slot 135, the screw is further connected and fixed from the bottom.

[0121] Preferably, a detachable plug (not shown) can also be arranged on the counterbore. After the front panel 132 is fixed on the shell 131 by the screw, the plug is used to cover the screw in the counterbore, further meeting the design of no exposed screws on the front surface of the shell 1.

[0122] In some embodiments, in order to facilitate the operator to quickly assemble the lining plate 12 and the rear shell 11 on site, 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.

[0123] Specifically, during assembly, the mounting table 112 can support and position the lining plate 12, so as to facilitate the operator to quickly connect and assemble the lining plate 12 and the rear shell 11 together.

[0124] In another embodiment, in order to facilitate positioning of the assembled rear shell 11 and the backing plate 12, a second positioning groove 113 can be provided on the mounting table 112, and the edge of the backing plate 12 is clamped in the second positioning groove 113.

[0125] Specifically, in the process of assembling 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.

[0126] 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 screw hole 111.

[0127] Finally, the screw is passed 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.

[0128] In order to accurately position the relative position between the rear shell 11 and the backing plate 12, a step surface 114 can be provided on the inner wall of the rear shell 11, and a positioning rib 126 is provided on the outer wall of the backing plate 12, and the positioning rib 126 abuts against the step surface 114.

[0129] 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 step surface 114, thereby accurately positioning the rear shell 11 and the backing plate 12 to improve the overall assembly quality of the shell assembly.

[0130] In an embodiment, the edge of the rear shell 11 is further provided with a blocking rib 115 located outside the step 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.

[0131] 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.

[0132] 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.

[0133] 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 designed mainly according to the overall size of the shell assembly.

[0134] For example, a plurality of mounting platforms 112 can be arranged 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.

[0135] Correspondingly, the backing plate 12 is provided with a plurality of first through holes 121 corresponding to the mounting platforms 112, so as to be connected and fixed by a plurality of screws.

[0136] Similarly, the number of clamping connections between the front shell 13 and the backing plate 12 is also provided with a plurality, which is not limited here.

[0137] By adopting the backing plate to connect the front shell and the rear shell together, the backing plate and the rear shell are tightly connected together by screws to meet the overall structural strength requirement of the shell, and the front shell is connected with the backing plate by clamping, and the front shell covers the backing plate and shields 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.

[0138] Based on the above-mentioned embodiments one and two, the shell 1 of the present application has the following structure design.

[0139] As shown in the embodiment three, Figure 7 The shell 1 adopts a flat design to reduce the effective space occupied by the electric water heater in the room, the overall thickness of the shell 1 is reduced, and the size of the height and / or length of the shell 1 is increased, thereby meeting the volume requirement of the electric water heater.

[0140] Correspondingly, the inner container 2 arranged in the shell 1 adopting the flat design can also adopt the flat design, thereby fully utilizing the internal space of the shell 1 to obtain an inner container 2 with large enough volume.

[0141] In the preferred embodiment, the ratio of the thickness size to the length size of the shell 1 is in the range of 1:(1.4-2.5); and / or, the ratio of the thickness size to the height size of the shell 1 is in the range of 1:(1.4-2.5).

[0142] Specifically, for the thickness of the shell 1, the thickness size needs to be smaller than the length and height sizes to meet the requirement of the flat design of the shell 1. At the same time, there needs to be enough space in the shell 1 to place the inner container 2, and at the same time meet the volume requirement of the inner container 2 and the design requirement of the inner container 2 as a pressure container.

[0143] To this end, the thickness of the shell 1 needs to be in a reasonable range compared to the length and height. That is, the flat design requirement is guaranteed, and the installation requirement of the inner container 2 is guaranteed.

[0144] In some embodiments, in order to meet the flat design requirement while ensuring convenient installation and fixation, the thickness of the shell 1 is smaller than the length and height of the shell 1, and the back of the shell 1 forms an installation surface; the cross section of the shell 1 perpendicular to the length or height direction has a first line segment a, a second line segment b, a third line segment c and a fourth line segment d connected in sequence, the first line segment a is arranged opposite to the third line segment c, and the second line segment b is arranged opposite to the fourth line segment d; wherein the first line segment a is arranged on the installation surface, and the curvature of the first line segment a is smaller than the curvature of the second line segment b and the fourth line segment d.

[0145] Specifically, the shell 1 adopts a flat design, and the thickness is smaller than the length and height, so that the length and height can be fully utilized to meet the water storage capacity requirement of the inner container 2. At the same time, the thickness of the shell 1 is relatively thin, and the distance between the shell 1 and the wall is small, so as to reduce the effective space occupation of the indoor space.

[0146] In addition, as a household appliance, the electric water heater also needs to meet the requirement of appearance beautification design. Therefore, the arc surface transition design of the shell 1 is an important measure to optimize the appearance.

[0147] As for the cross section shape of the shell 1 perpendicular to the length and height direction, the curvature of the first line segment a arranged on the back of the shell 1 is small, so that the shell 1 can better fit the surface of the wall, and the thickness of the shell 1 is reduced.

[0148] As for the second line segment b and the fourth line segment d connected to the two ends of the first line segment a, since the second line segment b and the fourth line segment d are distributed on the two sides of the shell, the shell 1 needs to realize smooth transition of the side surface and the front surface to achieve good appearance effect. Therefore, the curvature of the second line segment b and the fourth line segment d is large.

[0149] In the description of the present specification, the description of 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.

[0150] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A type of insulated water tank, characterized in that, include: The outer casing has a mounting opening at its front or rear, and the inner wall of the outer casing is also provided with an annular shielding portion, which is arranged around the mounting opening. The inner liner has a flat structure and is provided with a flange connection port; Electric heating components; The inner liner is located inside the outer shell, the annular shielding portion surrounds the outer side of the flange connection port, an insulation layer is provided between the outer shell and the inner liner, and the electric heating component is disposed on the flange connection port and extends into the interior of the inner liner; The outer shell includes a rear shell, a liner, 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 liner is provided with a first through hole, and the outer surface of the liner is also provided with a first snap-fit ​​part. The inner surface of the front shell is provided with a second snap-fit ​​part. The liner is connected to the rear shell, and the screw passes through the first through hole and is threaded into the corresponding first screw hole. The front shell covers the liner, and the first snap-fit ​​part is connected to the corresponding second snap-fit ​​part. The first snap-fit ​​part includes a snap-fit ​​groove and a first positioning groove, and the second snap-fit ​​part includes a snap-fit ​​claw and a first insertion tongue; the snap-fit ​​claw is snapped in the snap-fit ​​groove, and the first insertion tongue is inserted in the first positioning groove; the outer surface of the liner is provided with a first guide groove and a second guide groove, the first guide groove extends to the snap-fit ​​groove, and the second guide groove extends to the first positioning groove.

2. The insulated water tank according to claim 1, characterized in that, The annular shielding portion extends toward the flange connection port.

3. The insulated water tank according to claim 2, characterized in that, Along the direction from the mounting port to the flange connection port, the outer diameter of the annular shield gradually decreases.

4. The insulated water tank according to claim 1, characterized in that, A gap is formed between the edge of the annular shield and the outer wall of the inner liner.

5. The insulated water tank according to claim 4, characterized in that, The annular shielding portion is further provided with a first flexible sealing portion, which shields the gap.

6. The insulated water tank according to claim 4, characterized in that, The flange connection is provided with a second flexible sealing part on the outside, which covers the gap.

7. The insulated water tank according to claim 1, characterized in that, The edge of the annular shielding part rests against the outer wall of the inner liner.

8. The insulated water tank according to claim 1, characterized in that, A hanging bracket with mounting holes is provided on the back of the outer shell; a connecting bracket with threaded holes is provided on the back of the inner liner. A bolt passes through the mounting holes and extends into the inner shell, where it is threaded. The connecting bracket abuts against the inner wall of the outer shell.

9. The insulated water tank according to claim 1, characterized in that, The housing is also provided with a detachable front panel, which covers the mounting port.

10. The insulated water tank according to any one of claims 1-9, characterized in that, The thickness of the outer casing is less than its length and height, and the back of the outer casing forms a mounting surface. The cross-section of the outer casing perpendicular to its length or height direction has a first line segment, a second line segment, a third line segment, and a fourth line segment connected in sequence. The first line segment and the third line segment are arranged opposite each other, and the second line segment and the fourth line segment are arranged opposite each other. The first line segment is arranged on the mounting surface, and the curvature of the first line segment is less than the curvature of the second line segment and the fourth line segment.

11. An electric water heater, characterized in that, Including the insulated water tank as described in any one of claims 1-10.

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