Multi-tank electric water heater

Abstract

The invention discloses a multi-tank electric water heater, comprising: a shell, in which a fastening component is arranged, and the fastening component is in an annular structure; a plurality of inner tanks, the inner tanks are used to store water; a plurality of electric heating components, the electric heating components are used to generate heat when powered; wherein the electric heating components are arranged in the corresponding inner tanks, and the fastening components are tied to the outside of the inner tanks. The positioning reliability of the inner tanks is improved to improve the foaming quality.

Description

Technical Field

[0001] The invention belongs to the technical field of household appliances, and in particular relates to a multi-tank electric water heater. Background Art

[0002] At present, water heaters are household appliances commonly used in people's daily lives, and water heaters are divided into electric water heaters and gas water heaters according to different heating sources. Electric water heaters are widely used because of their easy installation. The electric water heater usually includes an inner tank and an electric heater, and the electric heater is arranged in the inner tank to heat the water in the inner tank through the electric heater.

[0003] As people's demand for hot water increases, water heaters with double tanks are gradually being promoted. For example: Chinese Patent No. 201621414847.5 discloses a double tank ultra-thin water storage electric water heater, in which two inner tanks are arranged in the outer shell, and the two inner tanks are connected and fixed together by a connecting plate. Since the inner tank needs to be foamed in the outer shell, under the influence of the foaming material, the position or posture of the inner tank will change, and the foaming material will overflow.

[0004] In view of this, how to design a water heater with high installation reliability and good foaming quality is a technical problem to be solved by the present invention. Summary of the invention

[0005] The invention provides a multi-tank electric water heater, which can improve the positioning reliability of the inner tanks and thus improve the foaming quality.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a multi-tank electric water heater, comprising:

[0008] A housing, wherein a fastening component is disposed in the housing, and the fastening component is in an annular structure;

[0009] A plurality of inner tanks, wherein the inner tanks are used for storing water;

[0010] A plurality of electric heating components, wherein the electric heating components are used to generate heat when powered;

[0011] Wherein, the electric heating component is arranged in the corresponding inner pot, and the fastening component is tied to the outside of the inner pot.

[0012] In one embodiment of the present application, the fastening components are respectively arranged at both ends of the inner container.

[0013] In one embodiment of the present application, the fastening component simultaneously binds a plurality of the inner containers, a supporting component is disposed between two adjacent inner containers, and the supporting component is disposed on the fastening component.

[0014] In one embodiment of the present application, the support component has positioning grooves arranged in a back-to-back manner, and the liner is clamped in the positioning grooves.

[0015] In one embodiment of the present application, the support component includes two arc-shaped plates arranged back to back, and two ends of the arc-shaped plates are correspondingly connected to the inner wall of the support component.

[0016] In one embodiment of the present application, the inner liner is surrounded by independent fastening components; between two adjacent inner liner, the adjacent fastening components located on different inner liner are connected together.

[0017] In one embodiment of the present application, a connecting bracket is further provided on the outer wall of the supporting component, and a wall-mounted bracket is provided on the back of the housing, and the wall-mounted bracket is connected to the connecting bracket by bolts.

[0018] In one embodiment of the present application, the liner includes:

[0019] The gallbladder body is made of plastic material and is provided with a mounting opening;

[0020] A flange connector, wherein the flange connector is formed with an embedding portion and a mounting portion;

[0021] Wherein, the embedding portion is embedded in the mounting opening, and the electric heating component is arranged on the mounting portion.

[0022] In one embodiment of the present application, the flange connector includes a first flange and a second flange, the first flange is embedded in the mounting opening and forms the embedded portion, the second flange is threadedly connected to the first flange, and the second flange forms the mounting portion.

[0023] In one embodiment of the present application, a threaded hole is provided on the first flange, an external threaded portion is provided on the outside of the second flange, and the external threaded portion of the second flange is threadedly connected to the threaded hole of the first flange.

[0024] In an embodiment of the present application, a first outer flange is provided at one end of the first flange, and the first outer flange is located in the bladder body and abuts against the inner wall of the bladder body.

[0025] In one embodiment of the present application, a second outer flange is provided at the other end of the first flange, and the second outer flange is embedded into the gallbladder body from the inner wall of the installation opening.

[0026] In one embodiment of the present application, a support plate is further provided on the outer circumference of the second flange, a plurality of limit stops are provided on the support plate, and a positioning rib is provided on the outer side of the installation opening of the gallbladder body, and the positioning rib is used to cooperate with the limit stop to limit the position of the second flange.

[0027] In one embodiment of the present application, a folding structure is provided on the outer edge of the support plate, the limit stop is provided on the folding structure, and the free end of the limit stop extends to the outside of the folding structure toward the direction of the positioning rib.

[0028] In one embodiment of the present application, a sealing ring is provided between the second flange and the body, and the sealing ring surrounds the outer circumference of the installation port.

[0029] In one embodiment of the present application, the bladder body is blow-molded on the flange connector.

[0030] Compared with the prior art, the advantages and positive effects of the present invention are: by arranging a fastening component in the outer shell, the fastening component is annular in structure as a whole, and the fastening component can be used to stably and firmly bundle multiple inner tanks inside the outer shell to improve the position accuracy and stability of the inner tank in the outer shell. In this way, during the foaming process, the inner tank can be firmly and reliably fixed by the fastening component to ensure that the position of the inner tank remains unchanged during the foaming process, thereby improving the foaming quality and ultimately improving the product quality of the electric water heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0032] Figure 1 It is a structural schematic diagram of an embodiment of a multi-tank electric water heater of the present invention;

[0033] Figure 2 It is a partial structural schematic diagram of an embodiment of a multi-tank electric water heater of the present invention;

[0034] Figure 3 It is a partial structural schematic diagram of another embodiment of the multi-tank electric water heater of the present invention;

[0035] Figure 4 It is an assembly diagram of the inner tank and the electric heating component in another embodiment of the multi-tank electric water heater of the present invention;

[0036] Figure 5 for Figure 4Exploded diagram of the assembly of the middle inner tank and the electric heating component;

[0037] Figure 6 for Figure 4 An assembly cross-sectional view of the middle inner tank and the electric heating component;

[0038] Figure 7 for Figure 6 A partial enlarged schematic diagram of the middle A area;

[0039] Figure 8 It is a structural schematic diagram of the first flange in another embodiment of the plastic multi-tank electric water heater of the present invention;

[0040] Fig. 9 It is a structural schematic diagram of the second flange in another embodiment of the multi-tank electric water heater of the present invention;

[0041] Fig.10 This is a circuit connection diagram of the inner tank and the electric control board in another embodiment of the multi-tank electric water heater of the present invention.

[0042] Description of reference numerals:

[0043] Shell 1;

[0044] Fastening component 11, supporting component 12, connecting bracket 13, wall bracket 14, partition 15;

[0045] Curved plate 121;

[0046] Liner 2;

[0047] Gallbladder body 21, flange connection 22, sealing ring 23;

[0048] Boss 213, mounting opening 211, positioning rib 212, first flange 221, second flange 222, disk surface 220;

[0049] The notch 2201, the threaded hole 2211, the external threaded portion 2221, the first external flange 2212, the second external flange 2213, the retaining rib 2214, the support plate 2222, the limit stop 2223, the folding structure 2224,

[0050] Electric heating element 3;

[0051] Electric heating tube 31, flange 32, insulating gasket 33, bolt 34, nut 35, insulating sleeve 36, insulating ring 37;

[0052] Electric control board 4;

[0053] A first detection line 41 , a second detection line 42 , a first line lug 43 , and a second line lug 44 . DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0059] An electric water heater uses electricity as its main energy source. The high-temperature heat generated after power is turned on directly heats the water stored in the electric water heater to prepare hot water.

[0060] An electric water heater usually includes a water tank, an electric heating component, an electric control board and other components. A water storage cavity is formed in the water tank to store the water to be heated. The electric heating component is inserted into the water storage cavity formed by the water tank. The electric control board is used to control the on and off operation of the electric heating component so that the water in the water tank is heated to a set temperature.

[0061] For the water tank of an electric water heater, the water tank generally includes an outer shell and an inner tank, and an insulation layer is formed between the outer shell and the inner tank. Among them, the outer shell is generally made of plastic material to meet the design requirements of beautiful and diverse shapes; the inner tank can be made of metal or plastic according to needs.

[0062] In addition, the insulation layer formed between the outer shell and the inner liner, commonly used insulation materials include: asbestos, sponge, foam plastic, polyurethane foam, etc. In conventional technology, in order to obtain a good insulation effect, the insulation layer is usually formed by foaming.

[0063] Among them, for the inner tank using a metal tank body, the interior of the inner tank is prone to corrosion due to the influence of water quality. For this reason, a magnesium rod is also configured on the water tank, and the magnesium rod is inserted into the water storage cavity inside the water tank.

[0064] Since magnesium is the metal with the lowest potential in the electrochemical series and is physiologically non-toxic, it is ideal for making magnesium rods to protect the inner liner. The size of the magnesium rod is directly related to the length of time the inner liner is protected and the size of the protective effect. The larger the magnesium rod, the better the protective effect and the longer the protection time.

[0065] The water tank is also provided with a water inlet pipe and a water outlet pipe. The water inlet pipe is used to transport cold water to the water storage cavity formed in the water tank, while the hot water in the water storage cavity is output from the water outlet pipe.

[0066] For the electric heating component, electric heating methods such as electric heating wire, magnetic energy or silicon tube heating can be used to heat the water stored in the water storage cavity.

[0067] As for the electric control board, it is used to receive the detection signals sent by relevant sensors (such as water temperature sensors, flow sensors), and at the same time, control the power on and off operation of the electric heating components.

[0068] When the electric water heater is working, the electric control board controls the electric heating component to be powered on for heating. When the water temperature in the water tank reaches the set value, the electric control board controls the electric heating component to be powered off.

[0069] The water tank for an electric water heater according to the embodiment of the present invention. It should be noted that the water tank according to the embodiment of the present invention can be installed on a wall extending in a vertical direction or on a wall extending in a horizontal direction.

[0070] For the convenience of description, the structure of the water tank is described below by taking the water tank installed on a vertical wall as an example.

[0071] Embodiment 1, as Figure 1-Figure 2 As shown, the present invention provides a multi-tank electric water heater, comprising:

[0072] A housing 1, wherein a fastening component 11 is disposed in the housing 1, and the fastening component 11 is an annular structure;

[0073] A plurality of inner tanks 2, the inner tanks 2 being used for storing water;

[0074] A plurality of electric heating components 3, the electric heating components 3 are used to generate heat when powered;

[0075] The electric heating component 3 is arranged in the corresponding inner pot 2 , and the fastening component 11 is tied to the outside of the inner pot 2 .

[0076] Specifically, a plurality of inner tanks 2 are arranged in the outer shell 1 of the multi-tank electric water heater, and in order to reliably and firmly fix the inner tanks 2 in the outer shell 1 so as to keep the posture of the inner tanks 2 stable during the foaming process, a fastening component 11 is arranged in the outer shell 1, and the fastening component 11 is fixed inside the outer shell 1. The fastening component 11 uses its annular structure to bind the inner tanks 2, so that the inner tanks 2 can be firmly and reliably installed and fixed in the outer shell 1.

[0077] Since the inner tank 2 is fixed in the outer shell 1 by the fastening component 11. The fastening component 11 can firmly surround the periphery of the inner tank 2, and the inner tank 2 is hung in the outer shell 1 through the fastening component 11. During the foaming process, the foaming material enters between the outer shell 1 and the inner tank 2. Since the inner tank 2 is firmly positioned and fixed in the outer shell 1 by the fastening component 11, the displacement of the inner tank 2 caused by the influence of the foaming material is effectively reduced, so as to improve the foaming quality of the water heater.

[0078] In one embodiment of the present application, fastening components 11 are respectively arranged at both ends of the inner container 2 .

[0079] Specifically, the two ends of the inner liner 2 are fixedly installed by the fastening components 11, respectively, so that the inner liner 2 can be installed more firmly and securely. The fastening component 11 is annular in structure as a whole, and the fastening component 11 can expand and contract its own size. Before assembling the inner liner 2, the area surrounded by the fastening component 11 is large, so that the inner liner 2 can be easily loaded into the fastening component 11, and then the size of the area surrounded by the fastening component 11 is reduced so that the fastening component 11 is tightly tied to the outside of the inner liner 2.

[0080] The fastening component 11 may be specifically embodied in a variety of structural forms, for example, the fastening component 11 may be a clamp, the outer wall of the clamp is connected to the outer shell 1, the liner 2 is inserted into the clamp, and then the clamp is locked to firmly fix the liner 2. The specific embodiment of the fastening component 11 is not limited or elaborated herein.

[0081] In another embodiment, there are multiple specific fixing methods for the multiple inner containers 2 arranged in the outer shell 1. For example, an independent fastening component 11 is arranged around the outer surface of the inner container 2; between two adjacent inner containers 2, the adjacent fastening components 11 located on different inner containers 2 are connected together. Specifically, independent fastening components 11 are arranged at both ends of each inner container 2, so that the inner container 2 is independently installed in the outer shell 1 through the fastening components 11.

[0082] In a preferred embodiment, the fastening component 11 simultaneously binds a plurality of inner tubes 2 , a supporting component 12 is disposed between two adjacent inner tubes 2 , and the supporting component 12 is disposed on the fastening component 11 .

[0083] Specifically, taking the case where two inner containers 2 are arranged in the outer shell 1 as an example, the fastening component 11 surrounds the outside of the two inner containers 2 , and the two inner containers 2 are supported at intervals by the supporting component 12 .

[0084] The two inner shells 2 can be simultaneously bound and hung inside the outer shell 1 by the fastening component 11 , and the supporting component between the two inner shells 2 can assist the fastening component 11 to firmly and reliably fix the inner shells 2 in place.

[0085] In order to obtain a good supporting and positioning effect, the supporting component 12 has a positioning groove arranged in a back-to-back manner, and the inner liner 2 is stuck in the positioning groove. Specifically, the concave shape of the positioning groove matches the outer contour of the inner liner 2, so that the supporting component 12 can fit closely with the outer contour of the inner liner 2 to better support and position the inner liner 2.

[0086] In addition, the support component 12 may include two arc-shaped plates 121 arranged back to back, and two ends of the arc-shaped plates 121 are correspondingly connected to the inner wall of the support component 12 .

[0087] Specifically, the two ends of the arc plate 121 are respectively connected to the inner wall surface of the support component 12, and the arc plate 121 itself is close to the outer wall of the inner liner 2, so that the inner liner 2 is effectively supported and positioned. Among them, for the two arc plates 121, the two arc plates 121 can be set independently of each other, or the two arc plates 121 can be welded together for use. In addition, the two ends of the arc plate 121 can be fixed to the fastening component 11 by screws.

[0088] In some embodiments, in order to firmly and reliably fix the fastening component 11 in the shell 1, a connecting bracket 13 is also provided on the outer wall of the supporting component 12, and a wall-mounted bracket 14 is provided on the back of the shell 1. The wall-mounted bracket 14 is connected to the connecting bracket 13 by bolts.

[0089] Specifically, since the fastening component 11 is annular in structure, a connecting bracket 13 is provided on its outer wall to be installed and fixed with the housing 1 through the connecting bracket 13. At the same time, the housing 1 needs to be hung on a wall for use, and a wall bracket 14 needs to be configured on the housing 1 to meet the requirements of wall-mounting installation.

[0090] The wall-mounted bracket 14 is connected and fixed to the connecting bracket 13 by bolts, so that when in use, the weight of the inner liner 2 is transferred to the wall-mounted bracket 14 through the connecting bracket 13 to reduce the weight of the inner liner 2 on the outer shell 1, thereby improving the reliability of use.

[0091] Embodiment 2, as Figure 3-Figure 9 As shown, based on the above embodiment 1, in order to reduce heat loss, the inner tank 2 includes:

[0092] The gallbladder body 21 is made of plastic material and is provided with a mounting opening 211;

[0093] A flange connector 22, wherein the flange connector 22 is formed with an embedding portion and a mounting portion;

[0094] The embedded portion is embedded in the mounting opening 211 , and the electric heating component 2 is arranged on the mounting portion.

[0095] Specifically, the body 21 of the inner liner 2 is made of plastic material. The specific processing method of the body 21 can refer to the processing method of the conventional plasticized inner liner, which is not limited or elaborated here. The body 21 is made of plastic material. After the body 21 is connected to the fastening component 11, the two directly conduct less heat, so as to reduce the heat loss of the body 21.

[0096] During the processing of the gallbladder body 21, the embedded portion of the flange connector 22 will be integrally formed in the mounting opening 211 on the gallbladder body 21, so that the flange connector 22 is connected to the gallbladder body 21. In this way, the electric heating component 2 can be installed and fixed through the mounting portion on the flange connector 22, so that the electric heating component 2 can be installed and fixed on the gallbladder body 21.

[0097] Compared with the prior art which uses sheet metal heads to install the electric heater, the plasticized inner tank in this embodiment only needs to embed the flange connector 22 in the installation port 211 of the tank body 21 to meet the installation requirements of the electric heating component 2, so that the tank body 21 is made of plastic material as a whole, and the tank body 21 is blow-molded on the flange connector 22 to reduce the use of sheet metal parts, thereby effectively reducing the weight and, at the same time, reducing the manufacturing cost.

[0098] In one embodiment, the flange connector 22 includes a first flange 221 and a second flange 222 . The first flange 221 is embedded in the mounting opening 211 and forms the embedding portion. The second flange 222 is threadedly connected to the first flange 221 and forms the mounting portion.

[0099] Specifically, the flange connector 22 is composed of two flanges, wherein the first flange 221 is integrally embedded in the mounting opening 211 of the gallbladder body 21 during the processing of the gallbladder body 21, so that the first flange 221 and the gallbladder body 21 form an integrated structure. The second flange 222 is installed on the first flange 221 by threaded connection, and the second flange 222 is used to install and fix the electric heating component 2.

[0100] Two flanges are used to form the flange connector 22. On the one hand, when the gallbladder body 21 is plasticized and formed, it is convenient to embed the first flange 221 independently in the installation port 211 to facilitate the processing and forming of the gallbladder body 21. On the other hand, the second flange 222 is threadedly connected to the first flange 221, and the installation end face of the second flange 222 is located outside the gallbladder body 21, thereby making it convenient for the operator to fix the electric heating component 2 on the second flange 222.

[0101] In some embodiments, in order to facilitate the threaded connection between the first flange 221 and the second flange 222, a threaded hole 2211 is provided on the first flange 221, and an external threaded portion 2221 is provided on the outside of the second flange 222. The external threaded portion 2221 of the second flange 222 is threadedly connected to the threaded hole 2211 of the first flange 221.

[0102] Specifically, during the assembly process, the external threaded portion 2221 of the second flange 222 is aligned with the threaded hole 2211, and the second flange 222 is rotated so that the external threaded portion 2221 is threadedly connected to the threaded hole 2211, so that the two flanges are firmly and reliably fixed together.

[0103] In one embodiment, in order to ensure that the first flange 221 is firmly and reliably embedded in the mounting opening 211 of the gallbladder body 21 , a first outer flange 2212 is provided at one end of the first flange 221 . The first outer flange 2212 is located inside the gallbladder body 21 and abuts against the inner wall of the gallbladder body 21 .

[0104] Specifically, during the processing of the gallbladder body 21, the first flange 221 is directly embedded in the installation port 211 of the gallbladder body 21, and the gallbladder body 21 will be blow-molded on the outside of the first flange 221, and the first outer flange 2212 of the first flange 221 will be attached to the inner wall of the gallbladder body 21, so that the first flange 221 will not be pulled out of the gallbladder body 21.

[0105] In another embodiment, a second outer flange 2213 is disposed at the other end of the first flange 221 , and the second outer flange 2213 is embedded into the gallbladder body 21 from the inner wall of the installation opening 211 .

[0106] Specifically, during the processing of the gallbladder body 21, the second outer flange 2213 will be embedded in the inner wall of the installation opening 211, so as to prevent the first flange 221 from falling off and falling into the gallbladder body 21 through the second outer flange 2213. At the same time, during blow molding, the gallbladder body 21 will be filled with plastic between the first outer flange 2212 and the second outer flange 2213 to improve the connection strength between the first flange 221 and the installation opening 211.

[0107] Among them, a plurality of retaining ribs 2214 are arranged between the first outer flange 2212 and the second outer flange 2213. The retaining ribs 2214 are embedded into the interior of the gallbladder body 21 along the thickness of the gallbladder body 21, so that the first flange 221221 can be limited and fixed around its axial direction through the retaining ribs 2214 to prevent the first flange 221 from rotating when the second flange 222 is tightened.

[0108] In some embodiments, the first flange 221 is embedded in the body 21, and the second flange 222 is connected to the first flange 221 by threaded connection.

[0109] In order to prevent the first flange 221 from damaging the gallbladder body 21 due to over-tightening of the second flange 222, a support plate 2222 is further provided on the outer circumference of the second flange 222, and a plurality of limit stops 2223 are provided on the support plate 2222. The gallbladder body 21 is located on the outer side of the installation opening 211 and a positioning rib 212 is provided. The positioning rib 212 is used to cooperate with the limit stop to limit the position of the second flange 222.

[0110] Specifically, during the assembly process, the operator threadably connects the second flange 222 to the first flange 221. During the rotation of the second flange 222, the limit stop will gradually approach the positioning rib 212. When the second flange 222 is tightened to a set number of turns, the limit stop 32 will abut against the positioning rib 212 to limit the second flange 222 from continuing to rotate.

[0111] In this way, through the cooperation between the limit stop 2223 and the positioning rib 212, the number of rotations of the second flange 222 when it is threadedly connected to the first flange 221 can be limited, so as to reduce the axial torque borne by the first flange 221 while ensuring a stable connection of the second flange 222, thereby avoiding damage to the connection between the first flange 221 and the gallbladder body 21 due to excessive torque on the first flange 221.

[0112] In some embodiments, in order to facilitate the formation of the limit stop, a folding structure 2224 may be provided on the outer edge of the support plate 2222, and the limit stop is provided on the folding structure 2224, and the free end of the limit stop extends to the outside of the folding structure 2224 toward the direction of the positioning rib 212.

[0113] Specifically, the limit stop is formed on the hem knot so that the limit stop extends along the extension direction of the threaded portion. During assembly, as the threaded portion is gradually threaded into the threaded hole 2211, the limit stop gradually approaches the positioning rib 212 surrounding the outside of the installation opening 211, and finally the limit stop is abutted against the positioning rib 212 to complete the assembly.

[0114] In a preferred embodiment, in order to improve the sealing performance of the flange connector 22, it is necessary to seal the connection portion formed between the flange connector 22 and the gallbladder body 21, specifically: a sealing ring 23 is arranged between the second flange 222 and the gallbladder body 21, and the sealing ring 23 surrounds the outer periphery of the installation port 211.

[0115] Specifically, since the first flange 221 is directly embedded in the installation opening 211, there is a good sealing connection between the first flange 221 and the gallbladder body 21. In the process of tightening the second flange 222, the second flange 222 will gradually approach the gallbladder body 21, and then squeeze the sealing ring 23 between the gallbladder body 21 and the second flange 222.

[0116] A boss 213 is disposed at one end of the body 21 , a mounting opening 211 is formed on the boss 213 , and a sealing ring 23 is sandwiched between the boss 213 and the second flange 222 .

[0117] Specifically, the boss 213 protrudes from the end of the gallbladder body 21, and the installation port 211 is formed on the boss 213. After the second flange 222 is tightened, the sealing ring 23 will be squeezed between the table surface of the boss 213 and the second flange 222 to seal the connection area between the second flange 222 and the gallbladder body 21.

[0118] Embodiment 3: Based on the above embodiment 2, Figure 3-Figure 10 As shown, since a plastic liner is used, in order to avoid damage to the liner 2 due to dry burning of the electric heating component 3, the electric water heater is additionally configured with a resistance detection module for detecting the resistance between the liner 2 and the electric heating component 3. To this end, the electric control board 4 of the electric water heater may be integrated with a resistance detection module, for example: a circuit for detecting the resistance value may be integrated in the electric control board 4, or the electric control board 4 may be configured with an independent resistance detector, and the specific performance entity of the resistance detection module is not limited or elaborated herein.

[0119] In order to detect the resistance value conveniently, the resistance detection module has a first detection line 41 and a second detection line 42. As for the electric heating component 3, it includes an electric heating tube 31 and a flange 32, and the electric heating tube 31 is connected to the flange 32.

[0120] The flange 32 is insulated and arranged on the flange connector 22 , the electric heating tube 31 extends into the body 21 through the mounting opening 211 , the first detection line 41 is electrically connected to the flange connector 22 , and the second detection line 42 is electrically connected to the electric heating tube 31 .

[0121] Specifically, the resistance detection module is connected to the flange connector 22 and the electric heating tube 31 through the first detection line 41 and the second detection line 42. In this way, the resistance value between the flange connector 22 and the electric heating tube 31 can be detected.

[0122] The specific detection process is as follows: when the electric water heater is in use, after the tank 21 is filled with water, the electric heating tube 31 is powered on for heating. Due to the conductive property of water, the resistance value detected between the electric heating tube 31 and the flange connector 22 is small, and it is determined that there is water in the tank 21 and the electric heating tube 31 is not in a dry-burning state.

[0123] When the electric heating tube 31 is not immersed in water due to the lack of a resistor in the gallbladder body 21, the resistance detection module will detect that the resistance value between the electric heating tube 31 and the flange connector 22 becomes larger, and then judge that the electric heating tube 31 is in a dry-burning state, so as to control the electric heating tube 31 to be powered off through the electric control board 4 to protect the gallbladder body 21.

[0124] The specific resistance threshold value for judging whether the electric heating tube 31 is dry-burned can be determined through experiments, which will not be limited or elaborated here.

[0125] In some embodiments, a partition 15 is provided in the outer shell 1, and a through hole (not marked) is provided on the partition 15, and the partition 15 divides the interior of the outer shell 1 into a first cavity and a second cavity; the inner tank 2 is located in the first cavity, the flange connection 22 extends into the second cavity through the through hole, and the electric control board 4 is arranged in the second cavity.

[0126] Specifically, the housing 1 is divided into two different cavities by a partition 15, so that the body 21 and the electric control board 4 are installed in separate cavities, and the parts that need to be connected and tested are all located in the second cavity. In this way, it is convenient for operators to repair and maintain electrical components during later maintenance.

[0127] In another embodiment, in order to facilitate the connection between the flange connector 22 and the gallbladder body 21 and to facilitate the installation of the electric heating component 3, the flange connector 22 has an embedded portion and an installation portion, the embedded portion is embedded in the installation port 211, the flange plate 32 is arranged on the installation portion, and the first detection line 41 is electrically connected to the installation portion.

[0128] Specifically, the embedded portion of the flange connector 22 is embedded in the gallbladder body 21, and the electric heating component 3 is fixedly mounted on the mounting portion to meet the assembly requirements. At the same time, the first detection line 41 can be electrically connected to the mounting portion outside the gallbladder body 21, which is more convenient for operators to assemble and is also conducive to later maintenance and replacement.

[0129] In some embodiments, in order to achieve an insulated connection between the electric heating component 3 and the flange connector 22 , an insulating gasket 33 may be provided between the flange 32 and the mounting portion.

[0130] Specifically, after the electric heating component 3 is fixedly connected to the flange connector 22 via the flange 32, the flange 32 is insulated and separated from the flange connector 22 via the insulating pad 33, thereby ensuring that the resistance detection module can reliably and accurately detect the resistance value.

[0131] In order to conveniently fix the electric heating component 3 on the flange connector, the first flange 221 is used for the embedded part, and the second flange 222 is used for the mounting part. The first flange 221 and the second flange 222 are threadedly connected together. The edge of the disk 220 of the second flange 222 is provided with a plurality of notches 2201, and the flange 32 is provided with a plurality of insertion holes (not marked). The bolts 34 are stuck in the notches 2201 and pass through the insertion holes. The free end of the bolts 34 is threadedly connected with a nut 35.

[0132] Specifically, during the actual assembly process, the bolt 34 is stuck in the corresponding notch, and then the bolt passes through the insulating gasket 33 and the flange 32 and is connected and fixed with the nut 35, so that the electric heating component 3 is fixedly mounted on the second flange 222.

[0133] In order to meet the requirements of electrical connection of the detection line, an insulating sleeve 36 is provided in the jack, and the bolt 34 passes through the insulating sleeve 36; a first wire ear 43 is provided at the end of the first detection line 41, and a second wire ear 44 is provided at the end of the second detection line 42. The first wire ear 43 is sleeved on the outside of the bolt 34 and is electrically connected to the bolt 34, and the second wire ear 44 is sleeved on the outside of the insulating sleeve 36 and is electrically connected to the flange 32.

[0134] Specifically, the bolt 34 passes through the first wire lug 43 and the second wire lug 44, the first wire lug 43 directly contacts the bolt 34 and the nut 35, and then is indirectly electrically connected to the second flange 222 through the bolt 34, and the second flange 222 is electrically connected to the first flange 221, so as to detect the potential of the body 21. As for the second wire lug 44, it is sleeved on the outside of the insulating sleeve to achieve an insulated arrangement with the bolt 34, the second wire lug 44 is close to the flange 32, and the electric heating tube 31 is fixed on the flange 32, so as to be indirectly electrically connected to the electric heating tube 31 through the flange 32.

[0135] Furthermore, an insulating ring 37 is further provided on the outer circumference of the insulating sleeve 36 , and the insulating ring 37 is sandwiched between the first wire lug 43 and the second wire lug 44 , and the first wire lug 43 and the second wire lug 44 are insulated and spaced apart by the insulating ring 37 .

[0136] In addition, for the support plate, a gap is formed between the support plate and the disk surface of the second flange 222, and the nut of the bolt 34 is located in the gap. In this way, during assembly, after the bolt 34 is stuck in the notch 2201, the support plate can support and position the nut of the bolt 34 to facilitate assembly by the operator.

[0137] By arranging a flange connector made of metal material on the inner tank, on the one hand, the flange connector satisfies the requirement of connecting and fixing the electric heating component on the tank body made of plastic material, and on the other hand, the resistance detection module can detect the resistance value between the flange connector and the electric heating component, thereby judging whether there is a lack of water in the inner tank, and when the resistance detection module detects that there is a lack of water in the inner tank, the electric heating component is promptly powered off, thereby reducing the occurrence of dry burning of the electric water heater, playing a role in preventing dry burning, and improving the reliability of use.

[0138] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A multi-tank electric water heater, characterized in that: include: A housing, wherein a fastening component is disposed in the housing, and the fastening component is in an annular structure; A plurality of inner tanks, wherein the inner tanks are used for storing water; A plurality of electric heating components, wherein the electric heating components are used to generate heat when powered; Wherein, the electric heating component is arranged in the corresponding inner pot, and the fastening component is tied to the outside of the inner pot; The inner tank comprises: a tank body and a flange connector, wherein the tank body is made of plastic material and is provided with a mounting opening; the flange connector is formed with an embedding portion and a mounting portion, wherein the embedding portion is embedded in the mounting opening, and the electric heating component is provided on the mounting portion; The flange connector comprises a first flange and a second flange, the first flange is embedded in the mounting opening and forms the embedding portion, the second flange is threadedly connected to the first flange, and the second flange forms the mounting portion; A boss is provided at one end of the gallbladder body, a mounting opening is formed on the boss, a sealing ring is provided between the second flange and the gallbladder body, the sealing ring surrounds the outer circumference of the mounting opening, and the sealing ring is sandwiched between the boss and the second flange; A first outer flange is provided at one end of the first flange, and the first outer flange is located in the bladder body and abuts against the inner wall of the bladder body. A second outer flange is provided at the other end of the first flange, and the second outer flange is embedded into the bladder body from the inner wall of the mounting opening. A plurality of retaining ribs are further provided between the first outer flange and the second outer flange, and the retaining ribs are embedded into the interior of the bladder body along the thickness of the bladder body.

2. The multi-tank electric water heater according to claim 1, characterized in that: The fastening components are respectively arranged at the two ends of the inner container.

3. The multi-tank electric water heater according to claim 1, characterized in that: The fastening component binds a plurality of the inner containers at the same time, a supporting component is arranged between two adjacent inner containers, and the supporting component is arranged on the fastening component.

4. The multi-tank electric water heater according to claim 3, characterized in that: The supporting component has a positioning groove which is arranged in a back-to-back manner, and the inner liner is clamped in the positioning groove.

5. The multi-tank electric water heater according to claim 4, characterized in that: The support component comprises two arc-shaped plates arranged back to back, and two ends of the arc-shaped plates are correspondingly connected to the inner wall of the support component.

6. The multi-tank electric water heater according to claim 1, characterized in that: The inner container is surrounded by independent fastening components; between two adjacent inner containers, the adjacent fastening components located on different inner containers are connected together.

7. The multi-tank electric water heater according to claim 3, characterized in that: The outer wall of the supporting component is also provided with a connecting bracket, and the back of the shell is provided with a wall-mounted bracket, and the wall-mounted bracket is connected to the connecting bracket through bolts.

8. The multi-tank electric water heater according to claim 1, characterized in that: The liner body is blow-molded on the flange connection.

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