CN112944668A

CN112944668A - Electric water heater

Info

Publication number: CN112944668A
Application number: CN201911266697.6A
Authority: CN
Inventors: 陈�峰
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2021-06-11

Abstract

The invention discloses an electric water heater, comprising: shell, inner bag, first shutoff piece, second shutoff piece, heat preservation and automatically controlled box. And the two ends of the shell are respectively provided with a shell left end cover and a shell right end cover. The inner container is arranged in the shell, and the left end cover and the right end cover of the inner container are respectively arranged at the two ends of the inner container. The first plugging piece is arranged between the left end cover of the shell and the left end cover of the inner container. The second plugging piece is arranged between the right end cover of the shell and the right end cover of the inner container. The insulating layer is filled between the outer shell and the inner container. The electric control box is arranged in the second plugging piece. According to the electric water heater provided by the embodiment of the invention, the attractiveness and the performance of the electric water heater can be improved, so that the electric water heater is reasonable in structure, simple in production process and improved in production efficiency. Meanwhile, the filling amount of the foaming material can be properly increased, so that the heat preservation and heat insulation performance of the heat preservation layer is improved, and the energy consumption of the electric water heater is further reduced.

Description

Electric water heater

Technical Field

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

Background

With the improvement of the energy-saving standard of related household appliances in China, the energy-saving requirement of the electric water heater is higher and higher. The heat preservation performance of the electric water heater directly determines the energy consumption, and the overall heat preservation performance of the electric water heater mainly depends on the structure and the heat preservation performance of the heat preservation layer of the electric water heater.

In the insulating layer of the electric water heater disclosed in the related art, the filled foaming material is generally freely foamed or foamed with low filling amount (the over filling amount is usually less than 5%), the filling amount is too low, the inner container part area is easy to be completely wrapped by the insulating material, so that the existence of a heat insulation weak point is caused, and the differences of the density, the heat conductivity coefficient, the strength and other properties of the insulating layer at different parts are too large, so that the insulating effect of the insulating layer is not uniform. In the production process of the electric water heater, if the filling amount of the foaming material is only increased, adverse effects can be caused. For example, the housing end cap may be damaged by the expansion force of the foaming material, which may cause the housing end cap to deform and even burst, and also may cause the housing end cap to sink when the foam of the foaming material shrinks, which may affect the appearance quality of the electric water heater. And excessive foaming materials can pollute components and parts in the electric control chamber at the liner opening of the inner container and an end cover of the shell, and the performance and the appearance of the electric water heater are influenced.

Disclosure of Invention

The present invention is directed to at least solving the problems of the prior art. Therefore, the invention aims to provide the electric water heater, the appearance and the performance of the electric water heater can not be influenced, the structural design is reasonable, and the overall heat-insulating performance is excellent.

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

According to the electric water heater provided by the embodiment of the invention, on the premise of not changing the thickness of the insulating layer and the structural design of a mould of other components, the deformation of the left end cover and the right end cover of the shell can be avoided by arranging the first blocking piece and the second blocking piece, and the pollution of foaming materials on the left end cover, the right end cover and the electric control box of the shell is avoided, so that the attractiveness and the performance of the electric water heater are improved, the electric water heater is reasonable in structure, simple in production process and improved in production efficiency. Meanwhile, the filling amount of the foaming material can be properly increased to avoid the existence of an area which is not filled with the foaming material in the foaming space, so that the heat preservation and heat insulation performance of the heat preservation layer is improved, and the energy consumption of the electric water heater is further reduced.

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

in some embodiments of the present invention, the left end surface of the first blocking piece is attached to the inner surface of the left end cover of the outer shell, and the right end surface of the first blocking piece is attached to the outer surface of the left end cover of the inner container. Thereby avoiding deformation of the left end cover of the shell. Meanwhile, the first blocking piece can have a certain positioning effect on the inner container.

In some embodiments of the invention, the first closure comprises: the outer peripheral surface of the first blocking plate body is attached to the inner surface of the shell, and the left end surface of the first blocking plate body is attached to the inner surface of the left end cover of the shell; the first boss is arranged on the right side of the first plugging plate body and is superposed with the central line of the first plugging plate body, and the right end face of the first boss is formed into a shape matched with the outer surface of the inner container left end cover.

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

In some embodiments of the invention, the right end surface of the second blocking piece is attached to the inner surface of the right end cover of the outer shell, and the left end surface of the second blocking piece is attached to the outer surface of the right end cover of the inner container. Thereby avoiding deformation of the right end cover of the shell. And the left end face of the second plugging piece is attached to the outer surface of the right end cover of the inner container, so that a foaming material can be prevented from entering a space for installing the electric control box in the second plugging piece, and further, the foaming liquid is prevented from polluting the electric control box.

Specifically, the second block piece includes: the outer peripheral surface of the second plugging plate body is attached to the inner surface of the shell, and the right end face of the second plugging plate body is attached to the inner surface of the right end cover of the shell; the second boss is arranged on the left side of the second plugging plate body, the central line of the second boss coincides with the central line of the second plugging plate body, and a through hole for placing the electronic control box is defined in the second plugging plate body and the second boss.

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

Further, a flange is arranged on the outer surface of the inner container right end cover, the electric control box is installed in the through hole through the flange, and an anti-overflow ring is arranged between the outer peripheral surface of the flange and the outer surface of the inner container right end cover.

Optionally, the spill guard ring is a flexible thermal insulation material. Wherein, the anti-overflow material circle has certain flexibility to make the anti-overflow material circle can change the shape as required, and then make the anti-overflow material circle can laminate completely on inner casing right-hand member lid, second boss and the flange. Moreover, the anti-overflow material ring can bear the expansion force of foaming materials, so that the anti-overflow material ring is prevented from being damaged and losing efficacy. The anti-overflow ring has certain heat preservation performance, and can reduce the heat loss of the electric water heater.

Advantageously, the anti-overflow ring is made of sponge, rubber and plastic heat-insulating cotton or aerogel heat-insulating felt.

Furthermore, an adhesive is arranged on the anti-overflow ring, and the anti-overflow 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 permeating into the flange and avoiding the foaming material from polluting the components on the flange.

Optionally, the material of the first and second plugs is at least one of rigid Polyurethane (PU) foam board Expanded Polystyrene (EPS) foam board, extruded polystyrene (XPS) foam board, phenolic aldehyde (PF) foam board. From this, first shutoff piece and second shutoff piece all have certain elasticity for first shutoff piece and second shutoff piece have certain cushioning effect to the bulging force of foaming material, and make the bulging force distribute more evenly. In addition, the first sealing piece and the second sealing piece both have excellent heat preservation performance, so that the energy loss of the electric water heater is further reduced.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

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

Reference numerals:

an electric water heater 100,

An inner container 1, a left end cover 101 of the inner container, a right end cover 102 of the inner container,

A shell 2, a shell left end cover 201, a shell right end cover 202, a maintenance cover 203,

A heat-insulating layer 3,

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

An electric control box 5,

A first plugging member 6, a first plugging plate body 61, a first boss 62,

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

An anti-overflow ring 8, a flange 9,

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "center", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An electric water heater 100 according to an embodiment of the present invention is 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: the device comprises a shell 2, an inner container 1, a first plugging piece 6, a second plugging piece 7, a heat preservation layer 3 and an electric control box 5.

Wherein, the both ends of shell 2 are equipped with shell left end lid 201 and shell right-hand member lid 202 respectively, and the inner bag 1 is established in shell 2, and the both ends of inner bag 1 are equipped with inner bag left end lid 101 and inner bag right-hand member lid 102 respectively.

In the example shown in fig. 1, the shape of the liner 1 is substantially cylindrical, the central axis of the liner 1 is horizontally arranged along the left-right direction, and the left and right end surfaces of the liner 1 are respectively arc surfaces, that is, the outer surfaces of the liner left end cover 101 and the liner right end cover 102 are respectively arc surfaces. The casing 2 is also substantially cylindrical in shape, the casing 2 being arranged coaxially with the liner 1. Of course, the embodiment of the present invention is not limited thereto, and the housing 2 and the liner 1 may also have other shapes, which is not limited herein.

Referring to fig. 1, a first blocking piece 6 is arranged between a left shell end cover 201 and a left liner end cover 101, a second blocking piece 7 is arranged between a right shell end cover 202 and a right liner end cover 102, and an insulating layer 3 is filled between a shell 2 and a liner 1.

Specifically, the space defined between the first blocking piece 6, the second blocking piece 7, the inner container 1 and the outer shell 2 is a foaming space, and the foaming material is foamed in the foaming space to form the insulating layer 3. Optionally, the foam is a polyurethane foam.

Wherein, the foaming material generates expansion force in the foaming process, and the first plugging piece 6 is arranged at the left end cover 201 of the shell and the left end cover of the shell

Between the liner left end cover 101, the second plugging member 7 is disposed between the casing right end cover 202 and the liner right end cover 102, so that the contact area between the foaming material and the casing left end cover 201 and the casing right end cover 202 is reduced, even the foaming material does not contact with the casing left end cover 201 and the casing right end cover 202, that is, the first plugging member 6 and the second plugging member 7 have the function of plugging the foaming material, and for convenience of description, the function of "plugging the foaming material" is referred to as "plugging" in the following description.

Because the first blocking piece 6 and the second blocking piece 7 have the function of blocking bubbles, the shell left end cover 201 and the shell right end cover 202 are prevented from being polluted by foaming materials, the expansion force of the foaming materials can be buffered and dispersed, the expansion force applied to the shell left end cover 201 and the shell right end cover 202 is small, and even the expansion force is not applied to the shell left end cover 201 and the shell right end cover 202, so that the shell left end cover 201 and the shell right end cover 202 cannot deform due to the action of the expansion force. Meanwhile, when the foaming material shrinks in the later foaming period, the first blocking piece 6 and the second blocking piece 7 also buffer the shrinkage stress of the foaming material, so that the shell left end cover 201 and the shell right end cover 202 are prevented from sinking.

Therefore, the first plugging piece 6 and the second plugging piece 7 can improve the aesthetic degree of the electric water heater 100, and the thickness of the heat insulation layer 3 and the structural design of the mold of other components are not required to be changed, so that the electric water heater 100 has the advantages of simple and reasonable structure, simple production process and high processing efficiency.

In addition, since the left end cover 201 and the right end cover 202 of the housing are not easily deformed, the filling amount of the foaming material can be adjusted

When the amount of the foam is increased, for example, 10-20% in one specific example of the present invention, the left end cover 201 and the right end cover 202 of the housing can still maintain the same shape.

The proper increase of the filling amount of the foaming material can facilitate the formation of the heat-insulating layer 3 with higher density, more uniform distribution, lower heat conductivity coefficient and higher strength, thereby improving the heat-insulating and heat-insulating properties of the heat-insulating layer 3 and further reducing the energy consumption of the electric water heater 100. For example, in one particular example of the present invention, the electric water heater 100 may increase the energy efficiency by 1-2 levels.

Moreover, due to the appropriate increase of the filling amount of the foaming material, the situation that the foaming space is not filled with the heat-insulating layer 3 can be effectively avoided, and particularly, the areas of the heat-insulating layer 3 at the left end cover 101 and the right end cover 102 of the liner, which are not filled with the foaming material, can be avoided. Therefore, the liner left end cover 101 and the liner right end cover 102 can be wrapped and sealed by the insulating layer 3 with uniform density, and the overall insulating effect of the electric water heater 100 is improved.

Referring to fig. 1, the electronic control box 5 is disposed in the second block piece 7, thereby preventing the foaming material from contaminating the electronic control box 5.

Further, as shown in fig. 1, the electric water heater 100 further includes a magnesium rod 43, a water inlet pipe 41, a water outlet pipe 42 and a heater 44, one end of the magnesium rod 43, one end of the water inlet pipe 41, one end of the water outlet pipe 42 and one end of the heater 44 respectively extend into the inner container 1, the other end of the magnesium rod 43 extends into the foaming space through the inner container 1, the other end of the water inlet pipe 41 and the other end of the water outlet pipe 42 respectively extend out after passing through the inner container 1, the insulating layer 3 and the outer shell 2, and the other end of the heater 44 is. Wherein, the water inlet pipe 41 and the water outlet pipe 42 both adopt pipe fittings with electricity-proof wall function. It should be noted that the working principle 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 fitting with the electricity-proof wall function, etc. are all the prior art, and will not be described in detail here.

According to the electric water heater 100 provided by the embodiment of the invention, on the premise of not changing the thickness of the insulating layer 3 and the structural design of a mold of other components, the first blocking piece 6 and the second blocking piece 7 are arranged, so that the deformation of the shell left end cover 201 and the shell right end cover 202 can be avoided, and the pollution of foaming materials on the shell left end cover 201, the shell right end cover 202 and the electric control box 5 can be avoided, so that the attractiveness and the performance of the electric water heater 100 are improved, the electric water heater 100 is reasonable in structure, the production process is simple, and the production efficiency is improved. Meanwhile, the filling amount of the foaming material can be properly increased to avoid the existence of an area which is not filled with the foaming material in the foaming space, so that the heat preservation and heat insulation performance of the heat preservation layer 3 is improved, and the energy consumption of the electric water heater 100 is further reduced.

In some embodiments of the present invention, as shown in fig. 1, the left end face of the first blocking piece 6 is attached to the inner surface of the left end cover 201 of the outer shell, and the right end face of the first blocking piece 6 is attached to the outer surface of the left end cover 101 of the inner container.

Wherein, the left end face of first shutoff piece 6 and the laminating of the internal surface of shell left end lid 201 for there is not the clearance between the left end face of first shutoff piece 6 and the shell left end lid 201, therefore the foaming material can't permeate to between the left end face of first shutoff piece 6 and the shell left end lid 201, thereby avoids shell left end lid 201 to warp.

And the right end face of the first plugging piece 6 is attached to the outer surface of the inner container left end cover 101, so that the first plugging piece 6 has a certain positioning effect on the inner container 1. Specifically, the electric water heater 100 further includes a wall hanging member (not shown), by which the electric water heater 100 is fixed on a wall, and when the wall hanging member is assembled, the first blocking member 6 can prevent the inner container 1 and the outer container 2 from moving in a staggered manner. It should be noted that the wall hanging member may be a wall hanging member used for fixing the electric water heater 100 to a wall in the prior art, and is not limited herein.

In one embodiment of the invention, as shown in fig. 1, the first block piece 6 comprises a first block plate body 61 and a first projection 62.

The outer peripheral surface of the first blocking plate 61 is attached to the inner surface of the housing 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 housing.

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 housing, and the area of the left end surface of the first blocking plate body 61 is substantially equal to the area of the inner surface of the left end cover 201 of the housing, so that the first blocking piece 6 can be conveniently positioned, and the foaming material cannot permeate between the first blocking plate body 61 and the left end cover 201 of the housing, and meanwhile, the left end cover 201 of the housing can also receive the uniform supporting force of the first blocking plate body 61, thereby further ensuring that the left end cover 201 of the housing is not easy to deform. Alternatively, as shown in fig. 1, the first blocking plate body 61 is formed as a plate member having a uniform thickness. Referring to fig. 1, the first boss 62 is disposed at the right side of the first blocking plate body 61, the first boss 62 is overlapped with the center line of the first blocking plate body 61, and the right end face of the first boss 62 is formed in a shape matched with the outer surface of the liner left end cover 101. Specifically, the first boss 62 is substantially cylindrical, the center line of the first boss 62 is also coincident with the center line of the liner 1, and the right end surface area of the first boss 62 is smaller than the outer surface area of the liner left end cover 101.

More specifically, as shown in fig. 1, since the outer surface of the left end cap of the liner 1 is a curved surface, the right end surface of the first boss 62 is formed as a curved surface matching therewith. For example, in the example shown in fig. 1, the right end surface of the first boss 62 is formed as a curved surface curved toward a direction away from the liner 1.

In some embodiments of the present invention, the right end surface of the second blocking piece 7 is attached to the inner surface of the right end cover 202 of the housing, so that there is no gap between the right end surface of the second blocking piece 7 and the right end cover 202 of the housing, and therefore the foaming material cannot penetrate between the right end surface of the second blocking piece 7 and the right end cover 202 of the housing, thereby preventing the right end cover 202 of the housing from deforming. And the left end face of the second plugging piece 7 is attached to the outer surface of the right end cover 102 of the liner, so that a foaming material can be prevented from entering a space for installing the electric control box 5 in the second plugging piece 7, and further, the foaming liquid is prevented from polluting the electric control box 5.

In one embodiment of the invention, as shown in fig. 1, the second closure element 7 comprises a second closure plate body 71

And a second boss 72.

The outer peripheral surface of the second blocking plate 71 is attached to the inner surface of the housing 2, and the right end surface of the second blocking plate 71 is attached to the inner surface of the housing right end cap 202.

That is to say, as shown in fig. 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 right end cover 202 of the housing, and the area of the right end surface of the second blocking plate body 71 is substantially equal to the area of the inner surface of the right end cover 202 of the housing, so that the second blocking piece 7 can be conveniently positioned, the foaming material cannot penetrate between the second blocking plate body 71 and the right end cover 202 of the housing, and meanwhile, the right end cover 202 of the housing can also receive the uniform supporting force of the second blocking plate body 71, thereby further ensuring that the right end cover 202 of the housing is not easy to deform. Alternatively, as shown in fig. 1, the second blocking plate body 71 is formed as a plate member having a uniform thickness. Referring to fig. 1, the second boss 72 is disposed on the left side of the second blocking plate body 71, and a center line of the second boss 72 coincides with a center line of the second blocking plate body 71, wherein a through hole 73 for placing the electronic control box 5 is defined in the second blocking plate body 71 and the second boss 72.

Specifically, the center line of the second boss 72 coincides with the center line of the liner 1, and the area of the through hole 73 of the left end face of the second boss 72 is smaller than the area of the outer surface of the liner right end cover 102.

More specifically, the through hole 73 penetrates the second plugging member 7 in the left-right direction, and at this time, the second plugging member 7 is formed in a ring shape. Alternatively, the through-hole 73 is a circular hole, and a center line of the through-hole 73 coincides with a center line of the second boss 72.

Further, as shown in fig. 1, the housing right end cover 202 is further provided with a door hole penetrating in the thickness direction of the housing right end cover 202, the electric water heater 100 further includes a maintenance cover 203, and the maintenance cover 203 is provided on the housing right end cover 202 to open or close the door hole. Therefore, the electric control box 5 can be conveniently maintained or replaced, and the electric water heater 100 can be conveniently maintained.

In some embodiments of the present invention, as shown in fig. 1, a flange 9 is provided on the outer surface of the right end cover 102 of the liner, wherein the electronic control box 5 is installed in the through hole 73 through the flange 9, and an anti-overflow ring 8 is provided between the outer circumferential surface of the flange 9 and the outer surface of the right end cover 102 of the liner.

Specifically, the electronic control box 5 further includes components such as a temperature limiter (not shown), a temperature controller (not shown), and the like, wherein the structures, principles, and the like of the components such as the temperature limiter and the temperature controller are prior art, and will not be described in detail herein. In the example of fig. 1, the other end of the heater 44 is fixed to the flange 9, and the other end of the heater 44 is electrically connected to the electrical control box 5 through the flange 9.

Specifically, the anti-overflow material ring 8 is sleeved on the flange 9, the left end face of the anti-overflow material ring 8 is attached to the inner container right end cover 102, and the right end face of the anti-overflow material ring 8 is attached to the left end face of the second boss 72, so that the foaming material is prevented from permeating into the flange 9 or the through hole 73, and further the foaming material is prevented from polluting the flange 9 and components in the electronic control box 5.

More specifically, the spill guard ring 8 is a flexible insulating material. The anti-overflow ring 8 has certain flexibility, so that the shape of the anti-overflow ring 8 can be changed as required, and the anti-overflow ring 8 can be completely attached to the inner container right end cover 102, the second boss 72 and the flange 9. And the anti-overflow material ring 8 can bear the expansion force of foaming materials, so that the anti-overflow material ring 8 is prevented from being damaged and losing efficacy. The anti-overflow ring 8 has a certain thermal insulation performance, so that the heat loss of the electric water heater 100 can be reduced.

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

Further, an adhesive is arranged 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 inner container through the adhesive. Thereby further preventing the foaming material from permeating into the flange 9 and avoiding the foaming material from polluting the components on the flange 9. In the example shown in fig. 1, an adhesive is arranged between the left surface of the anti-overflow ring 8 and the right end cover 102 of the inner container, an adhesive is also arranged between the right surface of the anti-overflow ring 8 and the second boss 72, and at this time, the inner container 1 and the second blocking piece 7 are connected through the anti-overflow ring 8 and the adhesive, so that the second blocking piece 7 is not easy to move relative to the inner container 1 in a staggered manner, and the bubble blocking effect of the second blocking piece 7 is ensured.

In some embodiments of the invention, the material of the first and second block piece 6, 7 is at least one of rigid Polyurethane (PU) foam board, Expanded Polystyrene (EPS) foam board, extruded polystyrene (XPS) foam board, phenolic aldehyde (PF) foam board. From this, first shutoff piece 6 and second shutoff piece 7 all have certain elasticity for first shutoff piece 6 and second shutoff piece 7 have certain cushioning effect to the bulging force of foaming material, and make the bulging force distribute more evenly. Moreover, the first blocking piece 6 and the second blocking piece 7 both have excellent heat insulating 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 insulating 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, and at this time, the thermal conductivity of the first blocking member 6 and the second blocking member 7 is also 18mW/m · K, so that the overall thermal insulation effect of the electric water heater 100 is better and more uniform.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example" or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electric water heater, comprising: the two ends of the shell are respectively provided with a shell left end cover and a shell right end cover; the inner container is arranged in the shell, and a left inner container end cover and a right inner container end cover are respectively arranged at two ends of the inner container;

the first blocking piece is arranged between the left end cover of the shell and the left end cover of the liner; second plug

The second blocking piece is arranged between the right end cover of the shell and the right end cover of the inner container; an insulating layer, the insulating layer

Filling between the outer shell and the inner container; and the electric control box is arranged in the second plugging piece.

2. The electric water heater according to claim 1, wherein the left end face of the first blocking piece is attached to the inner surface of the left end cover of the outer shell, and the right end face of the first blocking piece is attached to the outer surface of the left end cover of the inner container.

3. The electric water heater of claim 2, wherein the first closure comprises: a first blocking plate body, the first

The outer peripheral surface of the blocking plate body is attached to the inner surface of the shell, and the first seal

The left end surface of the blocking plate body is attached to the inner surface of the left end cover of the shell; a first boss arranged at the right side of the first plugging plate body and at the center of the first plugging plate body

The lines are overlapped, wherein the right end face of the first boss is formed into a shape matched with the outer surface of the left end cover of the inner container.

4. The electric water heater according to claim 3, wherein a right end face of the first boss is formed as an arc face.

5. The electric water heater according to any one of claims 1-4, wherein the right end face of the second closure piece is attached to the inner surface of the right end cap of the outer shell, and the left end face of the second closure piece is attached to the outer surface of the right end cap of the inner container.

6. The electric water heater of claim 5, wherein the second closure comprises: a second sealing plate body, the second sealing plate body

The outer peripheral surface of the blocking plate body is attached to the inner surface of the shell, and the second seal

The right end face of the blocking plate body is attached to the inner surface of the right end cover of the shell; the second boss is arranged on the left side of the second plugging plate body, and the central line of the second boss is connected with the center line of the second plugging plate body

The central lines of the second plugging plate bodies are overlapped, and through holes for placing the electronic control box are defined in the second plugging plate bodies and the second bosses.

7. The electric water heater according to claim 6, wherein a centerline of the through-hole coincides with a 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 inner container, wherein the electric control box is installed in the through hole through the flange, and 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, wherein the flash-over prevention ring is a flexible insulation material.

10. The electric water heater according to claim 9, wherein the spill proof ring is a sponge, rubber-plastic insulation cotton or aerogel insulation felt.

11. The electric water heater according to claim 8, wherein an adhesive is disposed on the anti-flash ring, and the anti-flash ring is connected to the outer surface of the right end cover of the inner container through the adhesive.

12. The electric water heater according to claim 1, wherein the material of the first and second plugs is at least one of rigid Polyurethane (PU) foam board, Expanded Polystyrene (EPS) foam board, extruded polystyrene (XPS) foam board, phenolic aldehyde (PF) foam board.