CN104110834A - Electric water heater - Google Patents

Abstract

The invention discloses an electric water heater, which comprises: a shell, an inner tank, a first blocking piece, a second blocking piece, a thermal insulation layer and an electric control box. The two ends of the shell are respectively provided with a left end cover of the shell and a right end cover of the shell. The liner is arranged in the shell, and the two ends of the liner are respectively provided with a left end cover of the liner and a right end cover of the liner. The first blocking member is arranged between the left end cap of the shell and the left end cap of the inner tank. The second blocking member is arranged between the right end cover of the shell and the right end cover of the inner tank. The insulation layer is filled between the shell and the liner. The electric control box is arranged in the second blocking member. According to the electric water heater of the embodiment of the present invention, the appearance and performance of the electric water heater can be improved, so that the structure of the electric water heater is reasonable, the production process is simple, and the production efficiency is improved. At the same time, the filling amount of the foaming material can be appropriately increased, thereby improving the thermal insulation and thermal insulation performance of the thermal insulation layer, and further reducing the energy consumption of the electric water heater.

Description

water heater

technical field

The invention relates to the field of household appliances, in particular to an electric water heater.

Background technique

With the improvement of the relevant national energy-saving standards for household appliances, the energy-saving requirements for electric water heaters are also getting higher and higher. The insulation performance of an electric water heater directly determines its energy consumption, and the overall insulation performance of an electric water heater mainly depends on the structure and insulation performance of the insulation layer of the electric water heater.

In the insulation layer of the electric water heater disclosed in the related art, the filled foaming material generally adopts free foaming or foaming with a low filling amount (the overfilling amount is usually less than 5%). It is completely wrapped by the insulation material, which leads to the existence of weak points in the insulation, and also leads to excessive differences in the density, thermal conductivity, and strength of the insulation layer at different parts, making the insulation effect of the insulation layer uneven.

However, in the production process of electric water heaters, if only the filling amount of the foaming material is increased, adverse consequences will be produced. For example, the shell end cover will be damaged by the expansion force of the foam material, causing the shell end cover to deform or even burst. For example, when the foam of the foam material shrinks, the shell end cover will sink, thereby affecting the appearance quality of the electric water heater. Moreover, too much foaming material will pollute the components and parts in the electric control room at the mouth of the liner and the end cover of the shell, which will affect the performance and appearance of the electric water heater.

Contents of the invention

The present invention aims to solve at least the technical problems existing in the prior art. For this reason, the purpose of the present invention is to provide an electric water heater, the appearance and performance of the electric water heater are not affected, and the structural design is reasonable, and the overall thermal insulation performance is excellent.

The electric water heater according to the embodiment of the present invention comprises: a shell, the two ends of the shell are respectively provided with a left end cover of the shell and a right end cover of the shell; The left end cover of the inner tank and the right end cover of the inner tank are respectively provided at the ends; the first blocking member is arranged between the left end cover of the outer casing and the left end cover of the inner container; the second blocking member, The second blocking member is arranged between the right end cover of the outer shell and the right end cover of the inner tank; an insulation layer, the insulating layer is filled between the outer shell and the inner tank; and an electric control box, the The electric control box is arranged in the second blocking member.

According to the electric water heater of the embodiment of the present invention, under the premise of not changing the thickness of the insulation layer and the mold structure design of other components, the deformation of the left end cover and the right end cover of the housing can be avoided by setting the first blocking part and the second blocking part , and at the same time prevent the foam material from contaminating the left end cover of the shell, the right end cover of the shell and the electric control box, thereby improving the aesthetics and performance of the electric water heater, making the electric water heater reasonable in structure, simple in production process, and high in production efficiency. At the same time, the filling amount of the foaming material can be appropriately increased to avoid areas not filled with the foaming material in the foaming space, thereby improving the thermal insulation and heat insulation performance of the insulation layer, thereby reducing the energy consumption of the electric water heater.

In addition, the electric water heater according to the present invention can also have the following additional technical features:

In some embodiments of the present invention, the left end surface of the first blocking member is in contact with the inner surface of the left end cover of the housing, and the right end surface of the first blocking member is in contact with the outer surface of the left end cover of the inner container. Surface fit. Thereby avoiding deformation of the left end cover of the casing. At the same time, the first blocking member can have a certain positioning effect on the inner container.

In some specific embodiments of the present invention, the first blocking member includes: a first blocking plate, the outer peripheral surface of the first blocking plate is in contact with the inner surface of the shell, and the The left end surface of the first blocking plate is attached to the inner surface of the left end cover of the housing; the first boss is arranged on the right side of the first blocking plate and is connected to the first boss. The centerlines of the blocking plate coincide, and the right end surface of the first boss is formed to match the outer surface of the left end cover of the inner container.

More specifically, the right end surface of the first boss is formed as an arc surface.

In some specific embodiments of the present invention, the right end surface of the second blocking member is in contact with the inner surface of the right end cap of the housing, and the left end surface of the second blocking member is in contact with the right end cap of the inner container. The outer surface fits. Thereby avoiding deformation of the right end cover of the housing. In addition, the left end surface of the second blocking part is attached to the outer surface of the right end cover of the inner tank, which can prevent the foaming material from entering the space for installing the electric control box in the second blocking part, thereby avoiding the pollution of the foaming liquid Electric control box.

Specifically, the second blocking member includes: a second blocking plate body, the outer peripheral surface of the second blocking plate body is in contact with the inner surface of the housing, and the second blocking plate body The right end surface is attached to the inner surface of the right end cover of the housing; the second boss is arranged on the left side of the second blocking plate, and the center line of the second boss is in line with the The centerlines of the second blocking plate coincide with each other, wherein the second blocking plate and the second boss define a through hole for placing the electric control box.

More specifically, the centerline of the through hole coincides with the centerline of the second boss.

Further, a flange is provided on the outer surface of the right end cover of the liner, wherein the electric control box is installed into the through hole through the flange, and the outer peripheral surface of the flange and the right end of the liner An anti-spill ring is provided between the outer surfaces of the cover.

Optionally, the anti-overflow ring is a flexible thermal insulation material. Wherein, the anti-overflow ring has certain flexibility, so that the shape of the anti-overflow ring can be changed according to needs, so that the anti-overflow ring can be completely attached to the right end cover of the inner shell, the second boss and the flange. Moreover, the anti-overflow ring can withstand the expansion force of the foaming material, thereby avoiding damage and failure of the anti-overflow ring. The anti-spill ring has a certain thermal insulation performance, which can reduce the heat loss of the electric water heater.

Advantageously, the anti-overflow ring is sponge, rubber and plastic thermal insulation cotton or airgel thermal insulation blanket.

Furthermore, an adhesive is provided on the anti-spill ring, and the anti-spill ring is connected to the outer surface of the right end cover of the inner container through the adhesive. Thereby further preventing the foaming material from penetrating into the flange and preventing the foaming material from contaminating components on the flange.

Optionally, the materials of the first blocking member and the second blocking member are rigid polyurethane (PU) foam board, expanded polystyrene (EPS) foam board, extruded polystyrene (XPS) foam At least one of board, phenolic (PF) foam board. Therefore, both the first blocking member and the second blocking member have a certain degree of elasticity, so that the first blocking member and the second blocking member have a certain buffering effect on the expansion force of the foaming material, and the expansion force is distributed more uniform. Moreover, both the first blocking part and the second blocking part have excellent thermal insulation properties, thereby further reducing energy loss of the electric water heater.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and comprehensible from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural view of an electric water heater according to an embodiment of the present invention.

Reference signs:

Electric water heater 100,

Inner tank 1, inner tank left end cover 101, inner tank right end cover 102,

Shell 2, shell left end cover 201, shell right end cover 202, maintenance cover 203,

Insulation layer 3,

Water inlet pipe 41, water outlet pipe 42, magnesium rod 43, heater 44,

Electric control box 5,

The first blocking member 6, the first blocking plate body 61, the first boss 62,

The second blocking member 7, the second blocking plate body 71, the second boss 72, the through hole 73,

Anti-overflow ring 8, flange 9,

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms "center", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

An electric water heater 100 according to an embodiment of the present invention will be described below with reference to FIG. 1 .

An electric water heater 100 according to an embodiment of the present invention, as shown in FIG. 1 , includes: a casing 2 , an inner tank 1 , a first blocking member 6 , a second blocking member 7 , an insulating layer 3 and an electric control box 5 .

Wherein, the two ends of shell 2 are provided with shell left end cap 201 and shell right end cap 202 respectively, liner 1 is arranged in shell 2, and the two ends of liner 1 are respectively provided with liner left end cap 101 and liner right end cap 102.

In the example shown in Figure 1, the shape of the inner tank 1 is substantially cylindrical, the central axis of the inner tank 1 is horizontally arranged along the left and right directions, and the left and right end surfaces of the inner tank 1 are arc surfaces respectively, that is to say, the left end cover of the inner tank is The outer surfaces of 101 and the right end cover 102 of the inner container are arc surfaces respectively. The shape of the shell 2 is also substantially cylindrical, and the shell 2 is coaxially arranged with the liner 1 . Of course, the embodiment of the present invention is not limited thereto, and the outer shell 2 and the inner container 1 may also have other shapes, which are not specifically limited here.

Referring to Fig. 1, the first blocking member 6 is arranged between the left end cap 201 of the shell and the left end cap 101 of the inner container, the second blocking member 7 is arranged between the right end cap 202 of the outer shell and the right end cap 102 of the inner container, and the insulation layer 3 is filled Between the shell 2 and the liner 1.

Specifically, the space defined between the first blocking member 6 , the second blocking member 7 , the liner 1 and the outer shell 2 is a foaming space, and the foaming material is foamed in the foaming space to form the above-mentioned thermal insulation layer 3 . Optionally, the foaming material is polyurethane foaming material.

Wherein, the foaming material generates expansion force during the foaming process, since the first blocking member 6 is arranged between the left end cap 201 of the outer shell and the left end cap 101 of the inner tank, the second blocking member 7 is arranged between the right end cap 202 of the outer shell and the inner container. Between the right end caps 102 of the gallbladder, the contact area between the foaming material and the left end cap 201 of the shell and the right end cap 202 of the shell is reduced, and even the foaming material does not contact the left end cap 201 of the shell and the right end cap 202 of the shell, that is to say, the first The blocking member 6 and the second blocking member 7 have the function of blocking the foaming material. For the convenience of description, the function of “blocking the foaming material” is referred to as “blocking foam” in the following description.

Because the first sealing member 6 and the second sealing member 7 have the effect of blocking foam, thereby avoiding the foaming material from contaminating the left end cover 201 and the right end cover 202 of the housing, and can buffer and disperse the expansion force of the foaming material, so that the outer shell The left end cap 201 and the right shell end cap 202 are subjected to little or no expansion force, so the left shell end cap 201 and the right shell end cap 202 will not be deformed by the expansion force. At the same time, when the foaming material shrinks in the later stage of foaming, the first blocking member 6 and the second sealing member 7 will also buffer the shrinkage stress of the foaming material, thereby avoiding the inner shell left end cap 201 and the shell right end cap 202. trap. Thus, the setting of the first blocking member 6 and the second blocking member 7 can improve the aesthetics of the electric water heater 100 without changing the thickness of the insulation layer 3 and the mold structure design of other components, thereby making the structure of the electric water heater 100 simple , Reasonable, simple production process, high processing efficiency.

In addition, since the left end cap 201 of the housing and the right end cap 202 of the housing are not easily deformed, the filling amount of the foaming material can be appropriately increased. For example, in a specific example of the present invention, when the overfilling amount of the foaming material is 10-20% , the left end cover 201 of the housing and the right end cover 202 of the housing can still maintain the same shape.

Appropriate increase in the filling amount of the foaming material can facilitate the formation of the thermal insulation layer 3 with higher density, more uniform distribution, lower thermal conductivity, and greater strength, thereby improving the thermal insulation and thermal insulation performance of the thermal insulation layer 3, thereby reducing the 100 ℃ of the electric water heater. energy consumption. For example, in a specific example of the present invention, the electric water heater 100 can improve the energy efficiency level by 1-2.

Moreover, the appropriate increase of the filling amount of the foaming material can also effectively avoid the situation that the foaming space is not filled by the insulation layer 3, especially the insulation layer 3 can be prevented from having unfilled space at the left end cover 101 of the inner container and the right end cover 102 of the inner container. Foam filled area. Thereby, it can be ensured that the left end cover 101 of the inner tank and the right end cover 102 of the inner tank can be wrapped and sealed by the thermal insulation layer 3 with uniform density, thereby improving the overall thermal insulation effect of the electric water heater 100 .

Referring to FIG. 1 , the electric control box 5 is arranged in the second blocking member 7 , so as to prevent the foam material from polluting the electric control box 5 .

Further, as shown in Figure 1, the electric water heater 100 also includes a magnesium rod 43, a water inlet pipe 41, a water outlet pipe 42 and a heater 44, and one end of the magnesium rod 43, the water inlet pipe 41, the water outlet pipe 42 and the heater 44 extends into the Into the inner tank 1, the other end of the magnesium rod 43 passes through the inner tank 1 and extends into the foaming space, and the other ends of the water inlet pipe 41 and the water outlet pipe 42 respectively pass through the inner tank 1, the insulation layer 3, and the outer shell 2 to extend back Out, the other end of heater 44 is electrically connected with electric control box 5. Wherein, the water inlet pipe 41 and the water outlet pipe 42 both adopt pipe fittings with the function of an electric wall. It should be noted that the working principles of the magnesium rod 43 , the water inlet pipe 41 , the water outlet pipe 42 and the heater 44 and the structure and principle of the pipe fittings with the function of an electric wall are all prior art, and will not be described in detail here.

According to the electric water heater 100 of the embodiment of the present invention, under the premise of not changing the thickness of the insulation layer 3 and the mold structure design of other components, by setting the first blocking part 6 and the second blocking part 7, the left end cover 201 of the shell can be avoided. and the deformation of the right end cover 202 of the shell, and at the same time prevent the foam material from contaminating the left end cover 201 of the shell, the right end cover 202 of the shell, and the electric control box 5, thereby improving the aesthetics and performance of the electric water heater 100, making the electric water heater 100 reasonable in structure, simple in production process, Increased productivity. At the same time, the filling amount of the foaming material can be appropriately increased to avoid areas not filled with the foaming material in the foaming space, thereby improving the thermal insulation and heat insulation performance of the thermal insulation layer 3 and reducing the energy consumption of the electric water heater 100 .

In some embodiments of the present invention, as shown in FIG. 1 , the left end surface of the first blocking member 6 is attached to the inner surface of the left end cover 201 of the casing, and the right end surface of the first blocking member 6 is attached to the left end cover 101 of the inner container. The outer surface fits.

Wherein, the left end surface of the first blocking member 6 is attached to the inner surface of the left end cover 201 of the casing, so that there is no gap between the left end surface of the first blocking member 6 and the left end cover 201 of the casing, so the foaming material cannot penetrate into the Between the left end surface of the first blocking member 6 and the left end cover 201 of the housing, the deformation of the left end cover 201 of the housing is avoided.

And the right end surface of the first blocking member 6 is attached to the outer surface of the left end cover 101 of the inner container, so that the first blocking member 6 has a certain positioning effect on the inner container 1 . Specifically, the electric water heater 100 also includes a wall hanging piece (not shown in the figure). The electric water heater 100 is fixed on the wall through the wall hanging piece. Dislocation movement between. It should be noted that the wall hanging piece may be a wall hanging piece used for fixing the electric water heater 100 on the wall in the prior art, which is not specifically limited here.

In a specific embodiment of the present invention, as shown in FIG. 1 , the first blocking member 6 includes a first blocking plate body 61 and a first boss 62 .

Wherein, the outer peripheral surface of the first blocking plate 61 is attached to the inner surface of the casing 2 , and the left end surface of the first blocking plate 61 is attached to the inner surface of the left end cover 201 of the casing.

That is to say, as shown in FIG. 1 , the shape of the left end surface of the first blocking plate body 61 is the same as the shape of the inner surface of the left end cover 201 of the casing, and the area of the left end surface of the first blocking plate body 61 is the same as that of the left end cover of the casing. The inner surface areas of 201 are substantially equal, thereby facilitating the positioning of the first blocking member 6, and the foaming material cannot penetrate between the first blocking plate body 61 and the left end cover 201 of the housing. At the same time, the left end cover 201 of the housing It can also be supported by the uniform supporting force of the first blocking plate 61, thereby further ensuring that the left end cover 201 of the housing is not easily deformed. Optionally, as shown in FIG. 1 , the first blocking plate body 61 is formed as a plate with uniform thickness.

Referring to Fig. 1, the first boss 62 is arranged on the right side of the first blocking plate body 61, and the first boss 62 coincides with the center line of the first blocking plate body 61, wherein the right end surface of the first boss 62 forms a It is a shape matched with the outer surface of the inner container left end cover 101.

Specifically, the shape of the first boss 62 is substantially cylindrical, and the centerline of the first boss 62 coincides with the centerline of the liner 1. surface area.

More specifically, as shown in FIG. 1 , since the outer surface of the left end cover of the inner container 1 is an arc surface, the right end surface of the first boss 62 is formed as an arc surface matched therewith. For example, in the example shown in FIG. 1 , the right end surface of the first boss 62 is formed as an arc surface that curves away from the inner container 1 .

In some specific embodiments of the present invention, the right end surface of the second blocking member 7 fits with the inner surface of the right end cover 202 of the casing, so that there is no gap between the right end surface of the second blocking member 7 and the right end cover 202 of the casing , so the foaming material cannot infiltrate between the right end surface of the second blocking member 7 and the right end cover 202 of the housing, thereby avoiding deformation of the right end cover 202 of the housing. And the left end surface of the second blocking member 7 is attached to the outer surface of the right end cover 102 of the inner container, so that the foaming material can be prevented from entering the space for installing the electric control box 5 in the second blocking member 7, and then Avoid the foaming liquid from polluting the electric control box 5.

In a specific embodiment of the present invention, as shown in FIG. 1 , the second blocking member 7 includes a second blocking plate body 71 and a second boss 72 .

Wherein, the outer peripheral surface of the second blocking plate 71 is attached to the inner surface of the casing 2 , and the right end surface of the second blocking plate 71 is attached to the inner surface of the right end cover 202 of the casing.

That is to say, as shown in Figure 1, the shape of the right end surface of the second blocking plate body 71 is the same as the shape of the inner surface of the housing right end cover 202, and the area of the right end surface of the second sealing plate body 71 is the same as that of the housing right end cover. The inner surface areas of 202 are substantially equal, thereby facilitating the positioning of the second blocking member 7, and the foaming material cannot penetrate between the second blocking plate body 71 and the right end cover 202 of the housing. At the same time, the right end cover 202 of the housing It can also be supported by the uniform supporting force of the second blocking plate 71, thereby further ensuring that the right end cover 202 of the housing is not easily deformed. Optionally, as shown in FIG. 1 , the second blocking plate body 71 is formed as a plate with uniform thickness.

Referring to Fig. 1, the second boss 72 is arranged on the left side of the second blocking plate body 71, and the center line of the second boss 72 coincides with the center line of the second blocking plate body 71, wherein the second blocking plate body 71 and the second boss 72 define a through hole 73 for placing the electric control box 5 .

Specifically, the centerline of the second boss 72 coincides with the centerline of the inner container 1 , and the area of the left end surface of the second boss 72 excluding the through hole 73 is smaller than the outer surface area of the right end cover 102 of the inner container.

More specifically, in the left-right direction, the through hole 73 passes through the second blocking member 7, and at this time, the second blocking member 7 is formed in a ring shape. Optionally, the through hole 73 is a circular hole, and the centerline of the through hole 73 coincides with the centerline of the second boss 72 .

Further, as shown in FIG. 1 , the right end cover 202 of the housing is also provided with a door hole through the thickness direction of the right end cover 202 of the housing. to open or close the door opening. Therefore, it is convenient to maintain or replace the electric control box 5 , thereby facilitating the maintenance of the electric water heater 100 .

In some embodiments of the present invention, as shown in Figure 1, a flange 9 is provided on the outer surface of the right end cover 102 of the inner container, wherein the electric control box 5 is installed into the through hole 73 through the flange 9, and the flange 9 An anti-overflow ring 8 is provided between the outer peripheral surface and the outer surface of the right end cover 102 of the inner container.

Specifically, the electric control box 5 also includes components such as a temperature limiter (not shown in the figure) and a temperature controller (not shown in the figure), wherein the structures and principles of the temperature limiter and the temperature controller are the same. As the prior art, it will not be described in detail here. In the example of FIG. 1 , the other end of the heater 44 is fixed on the flange 9 , and the other end of the heater 44 is electrically connected to the electric control box 5 through the flange 9 .

Specifically, the anti-overflow ring 8 is overlaid on the flange 9, and the left end surface of the anti-overflow ring 8 is attached to the right end cover 102 of the liner, and the right end surface of the anti-overflow ring 8 is attached to the second boss 72 On the left end face of the flange 9, thereby preventing the foaming material from penetrating into the flange 9 or the through hole 73, thereby preventing the foaming material from polluting the components in the flange 9 and the electric control box 5.

More specifically, the anti-overflow ring 8 is a flexible thermal insulation material. Wherein, the anti-spill ring 8 has certain flexibility, so that the anti-spill ring 8 can change its shape according to needs, and then the anti-spill ring 8 can be completely attached to the right end cover 102 of the inner container, the second boss 72 and the flange. Lan 9 on. Moreover, the anti-overflow ring 8 can bear the expansion force of the foaming material, thereby avoiding damage and failure of the anti-overflow ring 8 . The anti-overflow ring 8 has a certain thermal insulation performance, which can reduce the heat loss of the electric water heater 100 .

Optionally, the anti-overflow ring 8 is sponge, rubber and plastic insulation cotton or airgel insulation blanket. In some preferred embodiments of the present invention, airgel thermal insulation blanket is selected for the anti-overflow ring 8 because the airgel thermal insulation blanket has excellent thermal insulation, heat insulation and waterproof properties. In a specific example of the present invention, the thermal conductivity of the thermal insulation layer 3 is about 18mW/m K, and the thermal conductivity of the airgel thermal insulation blanket is also about 18mW/m K, so the thermal conductivity of the airgel thermal insulation blanket is close to Due to the thermal conductivity of the thermal insulation layer 3, the overall thermal insulation effect of the electric water heater 100 is relatively uniform.

Further, an adhesive is provided on the anti-overflow ring 8 , and the anti-overflow ring 8 is connected to the outer surface of the right end cover 102 of the liner through the adhesive. Thus further preventing the foaming material from penetrating into the flange 9 and preventing the foaming material from contaminating components on the flange 9 .

In the example shown in Figure 1, an adhesive is provided between the left surface of the anti-overflow ring 8 and the right end cover 102 of the liner, and an adhesive is also provided between the right surface of the anti-overflow ring 8 and the second boss 72. Adhesive, at this time, the liner 1 and the second blocking member 7 are connected through the anti-overflow ring 8 and the adhesive, so that the second blocking member 7 is not easy to displace and move between the inner bag 1, Furthermore, the bubble blocking effect of the second blocking member 7 is ensured.

In some embodiments of the present invention, the materials of the first blocking member 6 and the second blocking member 7 are rigid polyurethane (PU) foam board, expanded polystyrene (EPS) foam board, extruded polystyrene ( XPS) foam board, phenolic (PF) foam board at least one.

Therefore, both the first blocking member 6 and the second blocking member 7 have a certain degree of elasticity, so that the first blocking member 6 and the second blocking member 7 have a certain buffering effect on the expansion force of the foaming material, and Make the expansion force distribution more uniform. Moreover, both the first blocking member 6 and the second blocking member 7 have excellent thermal insulation properties, thereby further reducing the energy loss of the electric water heater 100 .

In a preferred embodiment of the present invention, the thermal conductivity of the insulation layer 3 is 18mW/m·K, and the first blocking member 6 and the second blocking member 7 are both rigid polyurethane (PU) foam boards. The thermal conductivity coefficients of the blocking member 6 and the second blocking member 7 are both 18 mW/m·K, so that the overall heat preservation effect of the electric water heater 100 is better and more uniform.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples" or "some examples" mean specific features described in connection with the embodiment or example, A structure, material or characteristic is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (12)

1. An electric water heater, characterized in that, comprising: A shell, the two ends of the shell are respectively provided with a left end cover of the shell and a right end cover of the shell; Inner tank, the inner tank is arranged in the outer shell, and the two ends of the inner tank are respectively provided with a left end cover of the inner tank and a right end cover of the inner tank; A first blocking member, the first blocking member is arranged between the left end cover of the shell and the left end cover of the liner; A second blocking member, the second blocking member is arranged between the right end cover of the outer shell and the right end cover of the liner; an insulating layer, the insulating layer is filled between the outer shell and the inner bag; and An electric control box, the electric control box is arranged in the second blocking member. 2. The electric water heater according to claim 1, characterized in that, the left end surface of the first blocking member is in close contact with the inner surface of the left end cover of the casing, and the right end surface of the first blocking member is in contact with the inner surface of the left end cover of the casing. The outer surface of the left end cover of the liner is pasted. 3. The electric water heater according to claim 2, wherein the first blocking member comprises: The first blocking plate body, the outer peripheral surface of the first blocking plate body is attached to the inner surface of the casing, and the left end surface of the first blocking plate body is attached to the inner surface of the left end cover of the casing combine; The first boss, the first boss is arranged on the right side of the first blocking plate and coincides with the center line of the first blocking plate, wherein the right end surface of the first boss is formed to be in line with the center line of the first blocking plate The outer surface of the left end cap of the liner matches the shape. 4. The electric water heater according to claim 3, wherein the right end surface of the first boss is formed as an arc surface. 5. The electric water heater according to any one of claims 1-4, characterized in that, the right end surface of the second sealing member is attached to the inner surface of the right end cover of the casing, and the second sealing member The left end surface of the blocking member is attached to the outer surface of the right end cover of the liner. 6. The electric water heater according to claim 5, wherein the second blocking member comprises: The second blocking plate body, the outer peripheral surface of the second blocking plate body is in contact with the inner surface of the housing, and the right end surface of the second sealing plate body is in contact with the inner surface of the right end cover of the housing combine; The second boss, the second boss is arranged on the left side of the second blocking plate, the center line of the second boss coincides with the center line of the second blocking plate, wherein the A through hole for placing the electric control box is defined in the second blocking plate body and the second boss. 7. The electric water heater according to claim 6, characterized in that, the centerline of the through hole coincides with the centerline of the second boss. 8. The electric water heater according to claim 6, wherein a flange is provided on the outer surface of the right end cover of the liner, wherein the electric control box is installed into the through hole through the flange, An anti-overflow ring is provided between the outer peripheral surface of the flange and the outer surface of the right end cover of the inner container. 9. The electric water heater according to claim 8, characterized in that, the anti-overflow ring is made of flexible thermal insulation material. 10. The electric water heater according to claim 9, characterized in that the anti-overflow ring is sponge, rubber and plastic insulation cotton or airgel insulation blanket. 11. The electric water heater according to claim 8, wherein an adhesive is provided on the anti-spill ring, and the anti-spill ring is connected to the right end cover of the inner container through the adhesive. on the outside. 12. The electric water heater according to claim 1, characterized in that the materials of the first blocking member and the second blocking member are rigid polyurethane (PU) foam board, expanded polystyrene (EPS) At least one of foam boards, extruded polystyrene (XPS) foam boards, and phenolic (PF) foam boards.