Electric water heater

Abstract

The utility model relates to the field of household appliances, in particular to an electric water heater which comprises a shell, a heating container and a foaming cushion layer, the heating container is arranged in the shell, a heating inner cavity is formed in the heating container, and the outer surface of the heating container is composed of a first end face, a second end face and a peripheral side face. The foaming cushion layer is arranged between the first end face and the shell, the foaming cushion layer comprises a foaming base and a plurality of positioning parts, and the tail ends of the positioning parts at least extend to the connecting boundary line of the peripheral side face and the first end face; the upper part of the positioning part is in contact with the side peripheral surface of the heating container, so that the heating container is more comprehensively supported by the foaming cushion layer, the stability of the heating container and the mounting coaxiality of the heating container and the shell are favorably improved, the heating container does not incline even under the action of a foaming material, the heat preservation layer is more uniform, and the heat preservation effect is better; and the subsequent assembly of structures such as hangers is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and in particular relates to an electric water heater. Background Art

[0002] Water heaters are household appliances commonly used in people's daily lives. The heating container in the water heater is used to heat and store water. Most of the two ends of the heating container are hemispherical to increase the capacity of the heating chamber.

[0003] A support pad is generally provided between the heating container and the outer shell to support the heating container. However, since the end of the heating container is hemispherical, it is difficult to position it during installation and processing. In addition, an insulation cavity is formed between the heating container and the outer shell, and the insulation cavity is used to fill insulation material. During the filling process of the insulation material, the heating container will be subjected to a certain force, causing the heating container to deflect.

[0004] The deflection of the heating container will cause the coaxiality between it and the outer shell to deteriorate, the thickness of the insulation layer around the heating container to be uneven, the insulation performance to deteriorate, the outer shell temperature to rise, heat to be lost, and ultimately the energy consumption of the water heater to increase. Utility Model Content

[0005] The utility model aims to provide an electric water heater to solve the problems existing in the prior art that the heating container in the existing electric water heater is difficult to position during installation, and the heating container is deflected under the action of external forces such as foaming materials, resulting in poor coaxiality between the heating container and the shell.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides an electric water heater, which comprises:

[0008] A housing having a mounting cavity formed therein;

[0009] A heating container is arranged in the installation inner cavity, a heating inner cavity is formed in the heating container, and the outer surface of the heating container is composed of a first end surface, a second end surface and a peripheral side surface;

[0010] A foam cushion layer is arranged between the first end surface and the shell, and the foam cushion layer includes a foam base and a plurality of positioning parts arranged at intervals along the circumference of the foam base, and the ends of the positioning parts extend at least to the connecting boundary line between the peripheral side surface and the first end surface.

[0011] Compared with the prior art, the advantages and positive effects of the utility model are:

[0012] The present application provides a foam pad layer between the first end face and the shell, and a plurality of positioning parts spaced apart on the foam pad layer extend at least to the connecting boundary line between the peripheral side face and the first end face. Then, the upper part of the positioning part contacts the side peripheral surface of the heating container, so that the foam pad layer supports the heating container more comprehensively. The heating container will not deflect left or right under the action of the positioning part, which is beneficial to improving the stability of the heating container and the installation coaxiality with the shell. Even if the heating container is affected by the foam material, it will not tilt. The thermal insulation layer is more uniform, the thermal insulation effect is better, and it is beneficial to the assembly of subsequent structures such as the hanging rack.

[0013] In some embodiments of the present application, a flow gap is formed between adjacent positioning portions, and a conformal surface matching the shape of the first end surface is formed on the side of the foam pad layer in contact with the heating container.

[0014] The conformable surface on the foam cushion layer is beneficial to increasing the contact surface with the heating container, thereby forming a stable support for the heating container.

[0015] In some embodiments of the present application, the shell includes an upper end cover, a lower end cover and a side wall, the foam pad layer is arranged between the upper end cover and the first end surface, an arc-shaped outer support wall is formed on the outer side of the positioning portion, and a gap of 0~5mm is formed between the positioning portion and the side wall.

[0016] The outer side of the positioning portion corresponds to the shape of the side wall, which helps to ensure the connection stability of the foam cushion layer in the shell, so as to provide stable support for the heating container.

[0017] In some embodiments of the present application, a water inlet interface and a water outlet interface are formed on the lower end cover, and a water inlet pipe group and a water outlet pipe group respectively pass through the water inlet interface and the water outlet interface and extend into the heating inner cavity.

[0018] The connection between the water inlet pipe group and the water outlet pipe group and the outer shell, the lower end cover and the heating container is conducive to ensuring that the coaxiality between the heating container and the outer shell is more accurate.

[0019] In some embodiments of the present application, the gap size formed between the water inlet pipe group and the water outlet pipe group and the water inlet interface and the water outlet interface is 1-3 mm.

[0020] The gaps between the outlet pipe group, the inlet pipe group and the outlet interface, the inlet interface are tolerance dimensions, which can avoid problems such as interference caused by processing and installation errors.

[0021] In some embodiments of the present application, a snap portion is formed on the inner side of the water inlet interface and / or the water outlet interface, a snap ring portion is formed on the water inlet pipe group and / or the water outlet pipe group, and the snap ring portion is fixed to the water inlet interface and / or the water outlet interface through the snap portion.

[0022] The clamping ring part is pre-fixed on the water inlet pipe group and the water outlet pipe group, and the installation efficiency and the assembly efficiency can be improved by the clamping connection mode of the clamping ring part and the buckle part.

[0023] In some embodiments of the present application, a flange is further fixed on the second end surface, and the heating element is connected to the heating inner cavity through the flange.

[0024] In some embodiments of the present application, an annular positioning recess is formed on the circumferential side of the foaming base, and a positioning protrusion matched with the positioning recess is formed on the upper end cover.

[0025] The corresponding installation method of the positioning concave part and the positioning convex part is conducive to improving the installation accuracy between the foam cushion layer and the upper cover plate, and the upper cover plate also forms an auxiliary positioning effect on the foam cushion layer through the positioning convex part to avoid the foam cushion layer from being deflected.

[0026] In some embodiments of the present application, a through middle hole is formed in the middle position of the foam base, and an insulation cavity is formed between the outer shell, the foam pad and the heating container for filling insulation material, and the insulation material is configured to flow along the flow gap into the middle hole.

[0027] The insulation material filled in the insulation cavity is transported to the middle hole through the flow gap, and can also flow into the gap between the positioning part and the shell, providing a more comprehensive insulation effect and helping to improve the stability of the foam cushion layer.

[0028] In some embodiments of the present application, the material of the foam pad layer is a foam piece.

[0029] In addition to its supporting effect, the foam cushion layer also cooperates with the thermal insulation material to keep the heating container warm.

[0030] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. 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 schematic diagram of the external structure of the electric water heater proposed by the utility model;

[0033] Figure 2 It is a disassembled schematic diagram of an electric water heater;

[0034] Figure 3 This is a schematic diagram of the installation position of the foam cushion;

[0035] Figure 4 It is one of the schematic diagrams of the foam cushion structure;

[0036] Figure 5 This is the second schematic diagram of the foam cushion structure;

[0037] Figure 6 It is a plan view of an electric water heater;

[0038] Figure 7 yes Figure 6 AA section view in;

[0039] Figure 8 2 is a schematic diagram of the lower end cover structure;

[0040] Fig. 9 Schematic diagram of the connection between the water inlet pipe group, the water outlet pipe group and the lower end cover;

[0041] In the figure,

[0042] 100. Shell;

[0043] 110, upper end cover;

[0044] 120, lower end cover; 121, water inlet interface; 122, water outlet interface; 123, buckle part;

[0045] 130, side wall;

[0046] 200, heating container; 210, first end surface; 220, second end surface; 230, peripheral side surface;

[0047] 300, foam cushion;

[0048] 310, foaming base; 311, middle hole; 312, positioning recess;

[0049] 320, positioning portion; 321, conformal surface;

[0050] 400, heating element;

[0051] 500, water inlet pipe assembly; 510, water inlet pipe; 520, first clamping ring portion;

[0052] 600, water outlet pipe assembly; 610, water outlet pipe; 620, second clamping ring portion;

[0053] 700. Flange. DETAILED DESCRIPTION

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

[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 a limitation of 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 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 utility model, 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 for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may 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] refer to Figure 1 , Figure 2 The utility model provides an electric water heater, which includes a shell 100, a heating container 200 and a foam cushion layer 300. An installation cavity is formed in the shell 100, and the heating container 200 is arranged in the installation cavity.

[0070] The electric water heater is placed upright when in use, the outer shell 100 is cylindrical, and the heating container 200 is ellipsoidal.

[0071] The housing 100 includes an upper end cover 110 , a lower end cover 120 and a side wall 130 .

[0072] The outer surface of the heating container 200 is composed of a first end surface 210 , a second end surface 220 and a peripheral side surface 230 , and a heating inner cavity is formed in the heating container 200 .

[0073] The foam cushion layer 300 is disposed between the upper end cover 110 and the first end surface 210 to support and limit the heating container 200 .

[0074] A heat-insulating layer is also provided between the outer shell 100 and the heating container 200 to keep the electric water heater warm and reduce heat loss.

[0075] The thermal insulation layer can be a foam part, which has the characteristics of thermal insulation, processing and low cost.

[0076] After the heating container 200, the shell 100 and the foam cushion layer 300 are installed, the heat-insulating cavity formed between the heating container 200 and the shell 100 is filled with heat-insulating material, and the heat-insulating material is shaped to form a heat-insulating layer.

[0077] refer to Figure 3-Figure 5 Specifically, the foam cushion layer 300 includes a foam base 310 and a plurality of positioning portions 320 arranged at intervals along the circumference of the foam base 310 , and the ends of the positioning portions 320 extend at least to the connecting boundary line between the peripheral side surface 230 and the first end surface 210 .

[0078] That is, the foam base 310 on the foam cushion layer 300 is installed on the top of the first end surface 210 , and each positioning portion 320 extends downward at least to the upper end of the peripheral side surface 230 .

[0079] A matching surface that matches the shape of the inner wall of the upper end cover 110 is formed on the top of the foaming base 310 so as to increase the contact area with the upper end cover 110 and improve the stability of the installation.

[0080] An arc-shaped outer supporting wall is formed on the outer side of the positioning portion 320 , and a gap of 0-5 mm is formed between the positioning portion 320 and the side wall 130 .

[0081] The outer side of the positioning portion 320 corresponds to the shape of the side wall 130 , which helps to ensure the connection stability of the foam pad layer 300 in the outer shell 100 , so as to provide stable support for the heating container 200 .

[0082] In the present application, a foam pad layer 300 is arranged between the first end surface 210 and the outer shell 100, and a plurality of positioning portions 320 arranged at intervals on the foam pad layer 300 extend at least to the connecting boundary line between the peripheral side surface 230 and the first end surface 210. Then, the upper part of the positioning portion 320 is in contact with the side peripheral surface of the heating container 200, so that the foam pad layer 300 supports the heating container 200 more comprehensively.

[0083] The heating container 200 will not deflect left or right under the action of the positioning part 320, which is beneficial to improving the stability of the heating container 200 and the coaxiality of the installation with the outer shell 100. Even if the heating container 200 is affected by the foaming material, it will not tilt. The insulation layer is more uniform, the insulation effect is better, and it is beneficial to the assembly of subsequent structures such as the bracket.

[0084] In some embodiments of the present application, a flow gap is formed between adjacent positioning portions 320 , and a conformal surface 321 matching the shape of the first end surface 210 is formed on the side of the foam pad 300 that contacts the heating container 200 .

[0085] The conformal surface 321 on the foam cushion layer 300 is helpful to increase the contact area with the heating container 200 and form a stable support for the heating container 200 .

[0086] Specific reference Figure 6 In some embodiments of the present application, a through middle hole 311 is formed in the middle position of the foam base 310, and a heat preservation cavity is formed between the shell 100, the foam cushion layer 300 and the heating container 200 for filling heat preservation material.

[0087] In order to improve the connection stability of the foam cushion layer 300 , thermal insulation materials are formed in the middle hole 311 , in the flow gap, and in the gap between the positioning portion 320 and the side wall 130 .

[0088] During the filling process of the heat-insulating material, the heat-insulating material flows along the circulation gap into the middle hole 311 , and a heat-insulating layer is formed in the middle hole 311 , in the circulation gap, and in the gap between the positioning portion 320 and the side wall 130 .

[0089] The finally formed thermal insulation layer can further fix the position of the foam cushion layer 300 and provide a limit for the foam cushion layer 300 .

[0090] In addition, the insulation material filled in the insulation cavity is transported to the middle hole 311 through the flow gap, and can also flow into the gap between the positioning part 320 and the outer shell 100, providing a more comprehensive insulation effect and helping to improve the stability of the foam pad 300.

[0091] In some embodiments of the present application, an annular positioning recess 312 is formed on the circumference of the foaming base 310 , and a positioning protrusion matched with the positioning recess 312 is formed on the upper end cover 110 .

[0092] The corresponding installation method of the positioning recess 312 and the positioning protrusion is conducive to improving the installation accuracy between the foam cushion layer 300 and the upper cover plate, and the upper cover plate also forms an auxiliary positioning effect on the foam cushion layer 300 through the positioning protrusion, thereby avoiding the foam cushion layer 300 from being deflected.

[0093] In some embodiments of the present application, the material of the foam pad layer 300 is a foam piece.

[0094] In addition to having a supporting effect, the foam cushion layer 300 also cooperates with the thermal insulation material to keep the heating container 200 warm.

[0095] refer to Figure 7-Figure 9 In some embodiments of the present application, a water inlet interface 121 and a water outlet interface 122 are formed on the lower end cover 120, and the water inlet pipe group 500 and the water outlet pipe group 600 respectively pass through the water inlet interface 121 and the water outlet interface 122 and extend into the heating cavity.

[0096] The water inlet pipe assembly 500 includes a water inlet pipe 510 and a water inlet fixing portion, and the water outlet pipe assembly 600 includes a water outlet pipe 610 and a water outlet fixing portion. The water inlet pipe 510 is connected to the water inlet interface 121 via the water inlet fixing portion, and the water outlet pipe assembly 600 is connected to the water outlet interface 122 via the water outlet fixing portion.

[0097] The connection between the water inlet pipe group 500 and the water outlet pipe group 600 and the outer shell 100, the lower end cover 120 and the heating container 200 is conducive to ensuring that the coaxiality between the heating container 200 and the outer shell 100 is more accurate.

[0098] In some embodiments of the present application, the gap size formed between the water inlet pipe group 500 and the water outlet pipe group 600 and the water inlet interface 121 and the water outlet interface 122 is 1-3 mm.

[0099] The gaps between the water outlet pipe assembly 600, the water inlet pipe assembly 500 and the water outlet interface 122, the water inlet interface 121 are tolerance dimensions, which can avoid interference problems caused by processing and installation errors.

[0100] In some embodiments of the present application, a snap-fit ​​portion 123 is formed on the inner side of the water inlet interface 121 and / or the water outlet interface 122, and a snap-fit ​​ring portion is formed on the water inlet pipe group 500 and / or the water outlet pipe group 600, and the snap-fit ​​ring portion specifically includes a first snap-fit ​​ring portion 520 formed on the water inlet pipe group 500 and a second snap-fit ​​ring portion 620 formed on the water outlet pipe group 600.

[0101] The first clamping ring portion 520 is connected to the water inlet interface 121 through the buckle portion 123 at the water inlet interface 121 .

[0102] The second snap ring portion 620 is connected to the water outlet interface 122 via the buckle portion 123 at the water outlet interface 122 .

[0103] Specifically, the snap ring portion is pre-fixed on the water inlet pipe group 500 and the water outlet pipe group 600, and the snap connection between the snap ring portion and the buckle portion 123 can improve the installation efficiency and the assembly efficiency.

[0104] In some embodiments of the present application, a flange 700 is further fixed on the second end surface 220 , and the heating element 400 is connected to the heating inner cavity through the flange 700 .

[0105] The heating element 400 is a heating tube, which is used to heat the water in the heating cavity after being energized.

[0106] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0107] 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 above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with 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. An electric water heater, characterized in that: include: A housing having a mounting cavity formed therein; A heating container is arranged in the installation inner cavity, a heating inner cavity is formed in the heating container, and the outer surface of the heating container is composed of a first end surface, a second end surface and a peripheral side surface; A foam cushion layer is arranged between the first end surface and the shell, and the foam cushion layer includes a foam base and a plurality of positioning parts arranged at intervals along the circumference of the foam base, and the ends of the positioning parts extend at least to the connecting boundary line between the peripheral side surface and the first end surface.

2. The electric water heater according to claim 1, characterized in that: A flow gap is formed between adjacent positioning portions, and a conformal surface matching the shape of the first end surface is formed on the side of the foam cushion layer in contact with the heating container.

3. The electric water heater according to claim 1, characterized in that: The shell includes an upper end cover, a lower end cover and a side wall. The foam pad layer is arranged between the upper end cover and the first end surface. An arc-shaped outer supporting wall is formed on the outer side of the positioning portion. A gap of 0 to 5 mm is formed between the positioning portion and the side wall.

4. The electric water heater according to claim 3, characterized in that: A water inlet interface and a water outlet interface are formed on the lower end cover, and a water inlet pipe group and a water outlet pipe group respectively pass through the water inlet interface and the water outlet interface and extend into the heating inner cavity.

5. The electric water heater according to claim 4, characterized in that: The size of the gap formed between the water inlet pipe group and the water outlet pipe group and the water inlet interface and the water outlet interface is 1-3 mm.

6. The electric water heater according to claim 5, characterized in that: A snap portion is formed on the inner side of the water inlet interface and / or the water outlet interface, and a snap ring portion is formed on the water inlet pipe group and / or the water outlet pipe group, and the snap ring portion is fixed to the water inlet interface and / or the water outlet interface through the snap portion.

7. The electric water heater according to claim 1, characterized in that: A flange is also fixed on the second end surface, and the heating element is connected to the heating inner cavity through the flange.

8. The electric water heater according to claim 3, characterized in that: An annular positioning recess is formed on the circumferential side of the foaming base, and a positioning protrusion matched with the positioning recess is formed on the upper end cover.

9. The electric water heater according to claim 8, characterized in that: A through middle hole is formed in the middle of the foam base, and an insulation cavity is formed between the shell, the foam cushion layer and the heating container for filling insulation material. The insulation material is configured to flow into the middle hole along the flow gap.

10. The electric water heater according to claim 1, characterized in that: The material of the foaming cushion layer is a foam piece.

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