CN115247889A - Flat inner container and electric water heater - Google Patents

Abstract

The invention discloses a flat inner container and an electric water heater, wherein the flat inner container comprises: the inner container is provided with a pipe seat in an integrated structure, and the pipe seat is arranged on the cambered surface of the inner container and extends towards the outside of the inner container; the water pipe assembly comprises an insulating pipe and a water pipe, and the water pipe is inserted into the insulating pipe; the insulating pipe is arranged on the pipe seat, and the water pipe is inserted into the pipe seat and extends into the inner container. The thickness size of the flat inner container is reduced, so that the space utilization rate is improved, and the user experience of the electric water heater is improved.

Description

Flat inner container and electric water heater

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a flat inner container and an electric water heater.

Background

At present, water heaters are household appliances commonly used in daily life of people, and the water heaters are divided into electric water heaters and gas water heaters according to different heating sources. The electric water heater is widely used due to the convenient installation. An electric water heater generally includes an inner container and an electric heater disposed in the inner container to heat water in the inner container by the electric heater.

For a conventional water storage type electric water heater, the conventional water storage type electric water heater generally comprises a water tank, an electric heating component and an electric control board, wherein the water tank comprises a shell and an inner container, the inner container is arranged in the shell, and an insulating layer is formed between the shell and the inner container to improve the insulating performance of the water tank. The inner container is generally arranged transversely, and for the heating pipe, the heating pipe is generally arranged in the inner container along the length direction of the inner container, and the heating pipe is electrified to generate heat so as to heat water in the inner container. The conventional water tank is generally cylindrical, which results in a large space occupied by the electric water heater in a room, resulting in poor user experience. The Chinese patent application number 201810022007.1 discloses an inner container for an electric water heater, which adopts a two-section structure and forms a flat inner container shell, so that the occupancy amount of an indoor space is reduced. However, the water inlet and outlet are arranged on the straight line section of the inner container due to the installation limitation of the water inlet and outlet pipe, which increases the thickness of the inner container.

In view of this, how to design a water heater technology with a small thickness and size to reduce the indoor space occupation and improve the user experience is the technical problem to be solved by the invention.

Disclosure of Invention

The invention provides a flat inner container and an electric water heater, which can reduce the thickness of the flat inner container to improve the space utilization rate and further improve the user experience of the electric water heater.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

in one aspect, the present invention provides a flat inner container comprising:

the inner container is provided with a pipe seat in an integrated structure, and the pipe seat is arranged on the cambered surface of the inner container and extends towards the outside of the inner container;

the water pipe assembly comprises an insulating pipe and a water pipe, and the water pipe is inserted into the insulating pipe;

the insulating pipe is arranged on the pipe seat, and the water pipe is inserted into the pipe seat and extends into the inner container.

In an embodiment of the application, the liner comprises two liner shells, the liner shells are integrally of an arc-surface structure, and at least one liner shell is provided with the pipe seat.

In an embodiment of the application, the tube seat extending outwards is formed by punching and flanging the liner shell.

In one embodiment of the application, the pipe seat is provided with a connecting pipe, and the connecting pipe is internally provided with an internal thread; one end of the insulating tube is provided with a first embedded part, the first embedded part is of a cylindrical structure, an external thread is formed on the outer periphery of the first embedded part, and the first embedded part is in threaded connection with the internal thread.

In one embodiment of the application, the first embedded part is further sleeved with a sealing ring, and the sealing ring is extruded between the connecting pipe and the insulating pipe.

In an embodiment of the present application, a second insert is disposed at the other end of the insulating tube, the second insert is of a cylindrical structure, and an external thread is also formed on an outer circumference of the second insert.

In an embodiment of the present application, a sleeve is further disposed outside the water pipe, and a plurality of through holes are formed in a wall of the sleeve.

In one embodiment of the application, the sleeve pipe with still fill between the water pipe and have the function filter material, sheathed tube upper end with be provided with first annular end cap between the water pipe.

In an embodiment of the present application, a lower end portion of the sleeve is connected to the insulating tube, or a lower end portion of the sleeve is connected to the first insert; or a second annular plug is arranged between the lower end part of the sleeve and the water pipe.

The invention also provides an electric water heater, which comprises a shell and the flat inner container, wherein the flat inner container is arranged in the shell, and an insulating layer is arranged between the flat inner container and the shell.

Compared with the prior art, the invention has the advantages and positive effects that: through set up the tube socket in order to satisfy the installation requirement of water pipe on the ARC structure at the courage shell, like this, alright in order to make the courage shell do not have the straightway or reduce the length of straightway, and then need not because of the length that the installation water pipe prolonged the straightway for the effectual reduction of whole thickness size of inner bag realizes reducing the thickness size of flat inner bag, with improvement space utilization, and then improves electric water heater's user experience.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a flat inner container according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line M-M of FIG. 1;

FIG. 3 is a partial enlarged view of the region N in FIG. 2;

FIG. 4 is a schematic view of the connection tube and the tube seat of the flat liner of the present invention;

FIG. 5 is a schematic structural view of another embodiment of the flat liner of the present invention;

FIG. 6 is an assembled view of a water tube assembly and a connection tube in another embodiment of the flat liner of the present invention;

FIG. 7 is a cross-sectional view of a water tube assembly in another embodiment of the flat bladder of the present invention;

FIG. 8 is an enlarged view of a portion of region I of FIG. 7;

FIG. 9 is a schematic structural view of an embodiment of a water tank for an electric water heater according to the present invention;

FIG. 10 is an exploded view of an embodiment of a water tank for an electric water heater according to the present invention;

FIG. 11 is a cross-sectional view of an embodiment of the electric water heater of the present invention;

FIG. 12 is an enlarged partial view of area A of FIG. 11;

FIG. 13 is an enlarged partial view of the area B in FIG. 11;

fig. 14 is a schematic structural view of a front panel in an embodiment of the electric water heater of the present invention.

Description of the reference numerals:

a housing 1;

the rear shell 11, a first screw hole 111, an installation platform 112, a second positioning groove 113, a step surface 114 and a blocking rib 115;

the lining plate 12, the first through hole 121, the first clamping part 122, the second screw hole 123, the first guide chute 124, the second guide chute 125, the positioning rib 126 and the extending edge 127;

a card slot 1221, a first positioning slot 1222;

the front shell 13, the second clamping part 130, the front panel 131, the shell 132, the second through hole 133, the groove 134, the slot 135, the second tongue 136 and the extension part 137;

a pawl 1301, a first insertion tongue 1302;

a mounting opening 101, an annular shield 102;

an inner container 2;

a liner shell 21 and a connecting pipe 22;

a stem 211, a linear extension 212;

a flange connection port 201 and a connection frame 202;

an electric heating part 3;

a water pipe assembly 4;

the insulation pipe 41, the water pipe 42, the first embedded piece 43, the sealing ring 44, the second embedded piece 45, the sleeve 46, the first annular plug 47, the second annular plug 48, the insertion hole 411, the threaded hole 451 and the through hole 461;

a hanger 100.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

The electric water heater adopts electric energy as a main energy material, and high-temperature heat generated after electrification directly heats water stored in the electric water heater so as to achieve the purpose of preparing hot water.

The electric water heater generally includes a water tank, an electric heating component, an electric control board and other components, wherein a water storage cavity is formed in the water tank to store water to be heated, the electric heating component is inserted into the water storage cavity formed in the water tank, and the electric control board is used for controlling the electric heating component to be powered on and powered off to operate, so that the water in the water tank is heated to a set temperature.

For a water tank of an electric water heater, the water tank generally comprises an outer shell and an inner container, and an insulating layer is formed between the outer shell and the inner container. Wherein, the shell is generally made of plastic materials to meet the design requirements of beautiful and diversified shapes; the inner container can be a metal container body or a plastic container body according to requirements.

In addition, the heat preservation layer formed between shell and the inner bag, commonly used heat preservation material have: asbestos, sponge, foamed plastic, polyurethane foam and the like, and in order to obtain a good heat preservation effect in the conventional technology, a foaming mode is usually adopted to form a heat preservation layer.

Wherein, for the inner bag that adopts the metal courage body, because influenced by water quality, the inside of inner bag corrodes easily, for this reason, still dispose the magnesium stick on the water tank, the magnesium stick inserts in the inside water storage cavity of water tank.

Magnesium is the lowest potential metal in the electrochemical series and is physiologically nontoxic. Therefore, the magnesium rod protective liner is very ideal. The size of the magnesium rod is directly related to the length of the time for protecting the inner container and the size of the protection effect, and the larger the magnesium rod is, the better the protection effect is and the longer the protection time is.

The water tank is also provided with a water inlet pipe and a water outlet pipe, the water inlet pipe is used for conveying cold water to a water storage cavity formed in the water tank, and hot water in the water storage cavity is output from the water outlet pipe.

For the electric heating component, an electric heating mode such as an electric heating wire, magnetic energy or silicon tube heating can be adopted to heat the water stored in the water storage cavity.

The electric control board is used for receiving detection signals sent by related sensors (such as a water temperature sensor and a flow sensor) and controlling the electric heating component to be powered on and powered off.

When the electric water heater works, the electric control board controls the electric heating part to be electrified and heated, and when the water temperature of water in the water tank reaches a set value, the electric control board controls the electric heating part to be powered off.

A water tank for an electric water heater according to an embodiment of the present invention. It should be noted that the water tank according to the embodiment of the present invention may be installed on a wall extending in a vertical direction, or may be installed on a wall extending in a horizontal direction.

For convenience of description, the structure of the water tank will be described below by taking the case where the water tank is mounted on a vertical wall as an example.

In the first embodiment, as shown in fig. 1 to 5, the present invention further provides a flat liner for an electric water heater, wherein the flat liner comprises a liner 2 and a water pipe assembly 4.

A pipe seat 211 of an integrated structure is formed on the inner container 2, and the pipe seat 211 is arranged on the arc surface of the inner container 2 and extends towards the outside of the inner container 2;

the water pipe assembly 4 comprises an insulating pipe 41 and a water pipe 42, wherein the water pipe 42 is inserted in the insulating pipe 41;

wherein, the insulating tube 41 is arranged on the tube base 211, and the water tube 42 is inserted in the tube base 411 and extends to the inner container 2.

Specifically, the inner container 2 comprises two container shells 21, at least one container shell 21 is provided with a tube seat 211 penetrating through the arc-shaped structure, the edges of the two container shells 21 are welded together, and a water storage cavity is formed between the two container shells 21.

The inner container 2 is of a flat structure as a whole, i.e. the thickness dimension is smaller than the length and height dimensions thereof. In order to meet the design requirement of the pressure container, the liner shell 21 is integrally of a cambered surface structure, so that the liner 2 has high pressure resistance.

And as for the tube seat 211, the tube seat 211 is used for connecting a water inlet pipe or a water outlet pipe of the electric water heater, the tube seat 211 is formed in the external arc surface area of the liner shell 21 and further away from a welding seam formed at the edge of the liner shell 21, so that a straight line segment does not need to be formed at the edge of the liner shell 21 or the length of the straight line segment at the edge of the liner shell 21 is reduced, and the integral thickness of the liner 2 is effectively reduced.

For the processing method of the tube seat 211, the tube seat 211 extending outward may be formed on the bladder shell 211 by punching and flanging.

In the actual use process, the overall appearance of the inner container 2 is designed according to the needs, for example: the inner container 2 may have a circular or oval structure, but is not limited thereto.

In other embodiments, for the bladder shell 21, the edge of the arc structure formed by the bladder shell is provided with linear extensions 212, and the two linear extensions are welded to each other.

Specifically, the purpose of further forming the linear extension 212 on the edge of the container shell 21 is to more easily and reliably weld the two container shells 21 together. Therefore, in the actual product design process, the width of the linear extension 212 only needs to meet the requirement of welding, so that the width of the linear extension 212 is narrow, and the width of the linear extension 212 can be designed to be less than 10mm.

In other embodiments, in order to avoid welding stress deformation of the shape of the stem 211 caused by heat generated by welding during welding of the vessel shell 21, the closest distance L of the stem 211 from the edge of the linear extension is not less than 7mm.

In one embodiment, in order to meet the installation requirement of the electric heating component, a flange connection port 201 is provided on one of the container shells 21. The electric heating element may extend into the water storage cavity through the flange connection port 201, and be connected and fixed to the flange connection port 201.

In some embodiments, in order to meet the requirement of hanging and installing the water tank, a connection frame 202 may be further disposed on the other container shell 21, and the connection frame 202 may be fixedly installed on the container shell 21 by welding, and when in use, the inner container 2 is fixedly hung and installed on the wall through the connection frame 202.

In order to effectively improve the space utilization, the connecting frame 202 is disposed at the middle upper portion of the bladder shell 21 for the inner bladder 2 with the largest thickness at the middle portion. Specifically, after the liner 2 is vertically installed on the wall, the distance between the middle of the liner 2 and the wall is the smallest, and along the arc surface of the liner shell 21, the distance between the liner 2 and the wall is gradually increased in the direction toward the edge of the liner 2. The space between the upper part of the inner container 2 and the wall can be fully utilized to realize the suspension installation by connecting the connecting frame 202 with the middle upper part of the inner container shell 21.

Embodiment two, based on above-mentioned embodiment one, as shown in fig. 5-8, water pipe assembly 4 is installed for convenience. A connecting pipe 22 is arranged on a pipe seat 211 of the inner container 2, the connecting pipe 22 is welded on the pipe seat 211, and the connecting pipe 22 is provided with internal threads;

one end portion of the insulating tube 41 is provided with a first insert 43, the first insert 43 having a cylindrical structure, an outer circumferential ring of the first insert 43 being formed with an external thread, and the first insert 43 being screwed into the internal thread.

Specifically, the water connecting pipe assembly 4 is provided with two sets of corresponding pipe seats 211 correspondingly in order to meet the requirements of water inlet and water outlet, and each pipe seat 211 is welded with a connecting pipe 22. Insulating tube 41 and water pipe 42 carry out assembled joint, and insulating tube 41's an end adopts the mode of inlaying of moulding plastics to be provided with first embedding piece 43, and first embedding piece 43 adopts the metal material to make to satisfy and be connected the requirement to structural strength with connecting pipe 22.

During assembly, the first insert 43 engages with its external thread with the internal thread of the connecting piece 22, in order to secure the connecting tube arrangement 4 to the connecting piece 22. At the same time, the water pipe 42 extends through the connection pipe 22 into the inner container 2.

And because the insulating tube 41 adopts the first embedded part 43 with external screw thread to connect with the connecting tube 22 on the inner container 2, the part of the first embedded part 43 extending out of the insulating tube 41 is connected to the inside of the connecting tube 22 by screw thread, so that the whole length formed by the insulating tube 41 and the connecting tube 22 is shortened, and the whole length of the insulating tube 41 outside the connecting tube 22 is effectively shortened, so as to reduce the volume of the whole electric water heater.

In some embodiments, in order to improve the sealing performance of the connection, a sealing ring 44 may be further sleeved outside the first insert 43, and the sealing ring 44 is compressed between the connection pipe 22 and the insulation pipe 41.

Specifically, after the first insert 43 is screwed into the connection pipe 22, the packing 44 is compressed between the connection pipe 22, the first insert 43, and the insulation pipe 41, thereby effectively sealing the connection portion formed between the connection pipe assembly 4 and the connection pipe 22.

In another embodiment, in order to meet the requirement of connecting household pipelines of users, a second insert 45 may be further provided at the other end of the insulating tube 41, the second insert 45 has a cylindrical structure, and the outer circumference of the second insert 45 is also formed with an external thread.

Specifically, the second insert 45 has a similar structure to that of the first insert 43, and the second insert 45 is externally provided with an external thread, so that when the second insert is installed in a user's home, a pipeline in the user's home can be conveniently connected with the insulating tube 41.

In some embodiments, in order to meet the functional requirements of detecting water temperature, water flow or water quality, a sensor (not shown) is further disposed on the water connection pipe assembly 4. In order to meet the installation requirement of the sensor, the side wall of the insulating tube 41 is provided with an insertion hole 411, the side wall of the second embedded part 45 is provided with a threaded hole 451, and the threaded hole 451 penetrates through the side wall of the second embedded part 45 and is communicated with the insertion hole 411.

Specifically, the sensor is inserted into the insertion hole 411, and the shell of the sensor is screwed into the threaded hole 451 of the second insert 45 in a threaded connection manner, so that the sensor is integrated on the water connecting pipe assembly 4. Therefore, the assembly of factory modularization is more favorably realized, and the overall assembly efficiency of the electric water heater is improved.

In one embodiment, in order to reduce the influence of the inlet and outlet water on the mixed flow of the stored water in the inner container 2, a sleeve 46 is further disposed outside the water pipe 42, and a plurality of through holes 461 are disposed on the wall of the sleeve 46.

Specifically, the water pipe 42 is configured as a water inlet pipe and a water outlet pipe as required, and for the water inlet pipe, the water flowing into the inner container 2 from the water pipe 42 firstly enters the sleeve 46 and then is output from the plurality of through holes 461, so as to effectively slow down the quick freezing of the water flowing into the inner container 2.

In a preferred embodiment, to enrich the functionality of the electric water heater, a functional filter material may also be filled between the sleeve 46 and the water tube 42. Specifically, the functional filter material can be water purifying material, mineral material or spice, and the functional filter material is filled between the sleeve 46 and the water pipe 42 and soaked in the water in the inner container 2. When a user uses the electric water heater to use hot water, the water enters the inner container 2 and flows through the functional filter material, so that the water quality is purified, mineralized or flavored, and the user experience is improved.

In order to prevent or reduce the functional filter material from being separated from the port between the sleeve 46 and the water pipe 42, a first annular plug 47 may be disposed between the upper end of the sleeve 46 and the water pipe 42.

Specifically, the first annular plug 47 will plug the free end of the sleeve 46, so that the functional filter material cannot leak out of the free end of the sleeve 46. In the fixing manner of the sleeve 46, the lower end of the sleeve 46 may be connected to the insulating tube 41, or the lower end of the sleeve 46 may be connected to the first insert 43. Alternatively, the other end of the sleeve 46 may be secured and sealed to the water tube 42 by a second annular plug 48.

Through be provided with the internal thread on the connecting pipe at the inner bag, and set up the external screw thread on the first embedment of insulating tube, the insulating tube is connected on the inner bag through first embedment, and first embedment will utilize the length of connecting pipe self to satisfy threaded connection to the requirement on the length, and then need not to set up longer connecting pipe outside the inner bag and connect the insulating tube, and simultaneously, the effectual brief of length of insulating tube self that also, realize shortening insulating tube length in order to reduce the electric water heater volume, and then improve space utilization, in order to improve electric water heater's user experience nature.

Based on the first and second embodiments, the embodiment of the present invention is directed to the flat liner 2, and the flat housing 1 is specially designed to have the following structural design.

In the third embodiment, as shown in fig. 9-14, the invention further provides a heat preservation water tank for an electric water heater, the water tank adopts a flat design to reduce the indoor effective space occupied by the electric water heater, and the heat preservation water tank comprises a shell 1, an inner container 2 and an electric heating part 3 which are assembled together. The outer shell 1 and the inner container 2 are both of flat structures, and the outer shell 1, the inner container 2 and the electric heating part 3 are correspondingly improved in structure as follows.

The front of the housing 1 is provided with a mounting opening 101, and the inner wall of the housing 1 is further provided with an annular shield portion 102, the annular shield portion 102 being disposed around the mounting opening 101.

The front part of the inner container 2 is provided with a flange connecting port 201.

The inner container 2 is located in the housing 1, the annular shielding portion 102 surrounds the outer side of the flange connection port 201, an insulating layer (not shown) is arranged between the housing 1 and the inner container 2, and the electric heating element 3 is arranged on the flange connection port 201 and extends into the inner container 2.

Specifically, the whole water tank adopts the flattening design, and its thickness dimension is less than height and length dimension, in order to satisfy the installation requirement of electric heating element 3, simultaneously, also to satisfy later stage electric heating element 3 maintenance requirement, then dispose installing port 101 in the front portion of shell 1, corresponding, the front portion of inner bag 2 disposes flange connection mouth 201.

When the electric heating part 3 needs to be assembled, the electric heating part 3 can be inserted from the mounting opening 101 and extend into the inner container 2 through the flange connecting opening 201 to complete the assembly. Similarly, when the electric heating element 3 is replaced in later maintenance, the electric heating element 3 can be detached from the inner container 2 through the attachment opening 101 and can be easily taken out.

Meanwhile, in the case of the water tank having a flat structure, the electric heating part 3 is installed at the front portion of the inner container 2 to sufficiently utilize the area of the front surface of the inner container 2 to firmly and reliably install the electric heating part 3.

More importantly, in order to reduce or avoid the foaming material from overflowing around the flange connecting port 201 of the inner container 2 during foaming, an annular shielding part 102 extending towards the flange connecting port 201 is formed on the inner wall of the housing 1, and the annular shielding part 102 is of a cylindrical structure and surrounds the periphery of the mounting port 101. When the inner container 2 is installed in the housing 1, the annular shielding portion 102 surrounds the flange connection port 201, and an area for blocking the leakage of the foaming material is formed between the annular shielding portion 102 and the flange connection port 201.

A foaming cavity is formed between the outer shell 1 and the inner container 2, after foaming materials are injected into the foaming cavity, when the foaming materials flow to the flange connecting port 201, the foaming materials can be blocked by the annular blocking portion 102, and then leakage of the foaming materials from the flange connecting port 201 is reduced.

In some embodiments, to improve the anti-flash effect, the edge of the annular shield 102 rests against the outer wall of the liner 2.

Specifically, after the inner container 2 is installed in the housing 1, the edge of the annular shielding portion 102 will be attached to the outer wall of the inner container 2, so that the annular shielding portion 102 can better prevent the foam material from leaking from the flange connecting port 201 during the foaming process.

In the preferred embodiment, for ease of assembly, a gap is formed between the edge of the annular curtain portion 102 and the outer wall of the inner container 2. Further, in order to reduce leakage of the foaming material from the gap, a first flexible sealing portion (not shown) may be provided outside the annular shielding portion 102, and the first flexible sealing portion may shield the gap.

Specifically, during the assembly process, the first flexible sealing portion is wound around the exterior of the annular shielding portion 102 and extends out to the edge of the annular shielding portion 102. After the inner container 2 is installed in the housing 1, since the first flexible sealing portion has elasticity and can deform, the first flexible sealing portion will tightly abut against the outer wall of the inner container 2, so as to effectively seal the gap formed between the annular shielding portion 102 and the inner container 2 through the first flexible sealing portion.

Similarly, a second flexible sealing portion that covers the gap may be provided outside the flange connection port 201.

Specifically, in the assembling process, a second flexible sealing portion is firstly wound around the flange connection port 201 on the liner 2. After the inner container 2 is installed in the housing 1, since the second flexible sealing portion is elastically deformable, the annular shielding portion 102 is pressed against the second flexible sealing portion, so that a gap formed between the annular shielding portion 102 and the inner container 2 is effectively sealed by the second flexible sealing portion.

In the actual use process, for the concrete representation entity of the flexible sealing portion, collodion or a sealing gasket and other components can be adopted, which are not limited and described herein.

In another embodiment, in order to better block the foaming material flowing to the flange connection port 201 through the annular shielding portion 102, the outer diameter of the annular shielding portion 102 is gradually reduced along the direction from the mounting port 101 to the flange connection port 201.

Specifically, the cross section of the annular shielding portion 102 is of a bell mouth structure, the size of a port of the annular shielding portion 102 opposite to the liner 2 is small, and the outer wall of the annular shielding portion 102 forms an inclined surface, so that on one hand, the small port is used for preventing the foaming material from overflowing, and on the other hand, the inclined outer wall is used for ensuring that the foaming material can flow along the inclined port so as to be uniformly distributed outside the liner 2.

In some embodiments, the position of the inner container 2 in the outer casing 1 is effectively positioned before foaming, so as to avoid the inner container 2 from shifting in the outer casing 1 during foaming. A connection bracket 202 is provided at the back of the inner container 2, and a screw hole (not marked) is provided at the connection bracket 202. Correspondingly, the back of the housing 1 is provided with a hanging rack 100, and the hanging rack 100 is provided with a mounting hole (not marked); bolts pass through the mounting holes and extend into the housing 1 to be screwed into the threaded holes 451, and the connecting bracket 202 abuts against the inner wall of the housing 1.

Specifically, after the inner container 2 is installed in the housing 1, the inner container 2 is fixed to the housing 1 by the connecting frame 202, and at the same time, the connecting frame 202 is connected to the hanger 100 by bolts, and plays a role of installing the hanger 100.

In another embodiment, the mounting opening 101 is formed in the front of the housing 1, and may be shielded by a front panel 131 disposed in the front of the housing 1 for the purpose of optimizing the appearance. The front panel 131 is fixed to the front of the housing 1 to shield the mounting opening 101 during normal use, and the front panel 131 is removed when maintenance of the electric heating part 3 is required.

Through the anterior configuration installing port at the shell in order to satisfy the installation of electrical heating part and the requirement of later stage maintenance, simultaneously, the inside of shell still is formed with the annular shielding part that extends towards the inboard around the installing port, annular shielding part surrounds the flange connection mouth periphery at the inner bag, because the front surface of annular shielding part and inner bag is mutually supported, can play better anti-overflow material to the periphery of flange connection mouth and handle, thus, in the foaming process, the foaming material flows into between shell and the inner bag after, the foaming material flows the flange connection mouth department of inner bag and can be blockked by annular shielding part, with reduce the foaming material excessive, and then improve the foaming quality, with improvement product quality.

Based on the second and third embodiments, the embodiment of the present invention also has the following structural design with respect to the housing 1.

Fourth embodiment, as shown in fig. 12 to 14, for the second and third embodiments of the outer shell 1, a flat design is adopted, and an arc-shaped design is adopted as a whole to achieve a good appearance design effect.

In order to achieve a front-view screwless design, the following design is used for the housing 1.

The housing 1 includes:

the rear shell 11, the edge of the rear shell 11 is provided with a first screw hole 111, and the back of the rear shell 11 forms a mounting surface;

the edge of the lining plate 12 is provided with a first through hole 121, the outer surface of the lining plate 12 is also provided with a first clamping part 122, the lining plate 12 is provided with a mounting hole 101, and the inner wall of the lining plate 12 is provided with an annular shielding part 102;

a second clamping part 130 is arranged on the inner surface of the front shell 13;

wherein, the lining board 12 is connected with the rear shell 11, the screw passes through the first through hole 121 and is screwed in the corresponding first screw hole 111, the lining board 12 is covered by the front shell 13, and the first clamping portion 122 is connected with the corresponding second clamping portion 130.

The rear shell 11 and the lining plate 12 in the shell 1 are connected by screws, and a mounting cavity is formed between the rear shell 11 and the lining plate 12 so as to mount the inner container through the mounting cavity. Connect fixedly through the screw between backshell 11 and the welt 12 for both directly have sufficient structural connection intensity, form the requirement of heat preservation to structural strength with the foaming between satisfying the later stage shell 1 and the inner bag.

For the connection process between the rear shell 11 and the liner plate 12, specifically: after the rear case 11 and the liner plate 12 are butted together such that the first through holes 121 are aligned with the corresponding first screw holes 111, screws are then inserted through the first through holes 121 and screwed into the first screw holes 111. Thus, the rear shell 11 and the lining plate 12 are firmly and reliably fastened and connected together through the screws.

In order to achieve the appearance effect without exposed screws, the front shell 13 is mounted on the liner 12 in a clamping manner. Specifically, after the rear case 11 and the lining plate 12 are fixedly connected together, since the first through hole 121 on the lining plate 12 can be seen from the front surface of the housing 1, in order to prevent the first through hole 121 and the screw from being exposed to the whole appearance, the first through hole 121 is shielded by the front case 13.

For the connection process between the front shell 13 and the liner plate 12, specifically: the second clamping portion 130 on the front shell 13 is clamped with the first clamping portion 122 at the corresponding position on the lining plate 12, so as to clamp the front shell 13 on the lining plate 12. Meanwhile, the first through hole 121 is shielded and processed through the front shell 13, so that the first through hole 121 cannot be seen outside the shell assembly, and the appearance effect that the whole screw is not exposed is achieved. Moreover, due to the adoption of the clamping mode, the clamping connection part is shielded by the front shell 13, so that the appearance effect is optimized.

In some embodiments, the concrete entities for the first card portion 122 and the second card portion 130 may take various structural forms, which are illustrated below.

The second catching portion 130 includes a claw 1301, the first catching portion 122 includes a catching groove 1221, and the claw 1301 is caught in the catching groove 1221.

Specifically, when the front shell 13 is connected with the lining plate 12 in a clamping manner, the clamping claws 1301 are clamped into the clamping grooves 1221, and the clamping claws 1301 are matched with the clamping grooves 1221, so that the front shell 13 is connected with the lining plate 12.

In order to improve the connection strength, the second clamping portion 130 further includes a first insertion tongue 1302, the first clamping portion 122 further includes a first positioning groove 1222, and the first insertion tongue 1302 is inserted into the first positioning groove 1222.

Specifically, when assembling, the first tongue 1302 is inserted into the first positioning groove 1222 to pre-position the front shell 13 and the lining plate 12, and then the claw 1301 is clamped in the clamping groove 1221 to complete the assembly between the front shell 13 and the lining plate 12.

The opening directions of the first positioning groove 1222 and the card groove 1221 are arranged back to back. In this way, the connection portion formed by the latch and the latch slot 1221 and the connection portion formed by the first insertion tongue 1302 and the first positioning slot 1222 are matched with each other, so that the front shell 13 can be more firmly and reliably fixed on the outer wall of the lining board 12.

In another embodiment, since the pawl 1301 and the first insertion tongue 1302 are both located on the inner wall of the front shell 13, when assembled, the inner wall of the front shell 13 and the outer wall of the lining plate 12 are matched with each other, so that it is difficult for an operator to accurately insert the first insertion tongue 1302 into the positioning groove.

For this, a first guide sliding groove 124 and a second guide sliding groove 125 may be provided on an outer surface of the liner 12, the first guide sliding groove 124 extending to the catching groove 1221, and the second guide sliding groove 125 extending to the catching groove.

Specifically, during assembly, an operator may first place the jaw 1301 in the first guide chute 124, while allowing the first tongue 1302 to be disposed in the second guide chute 125.

Then, the operator slides the front housing 13 along the first and second guide sliding grooves 124 and 125 to accurately insert the first insertion tongue 1302 into the first positioning groove 1222 and finally to clamp the pawl 1301 in the clamping groove 1221.

Under the guiding action of the first guide sliding groove 124 and the second guide sliding groove 125, the guide sliding grooves can cooperate with the first insertion tongue 1302 and the claw 1301 to guide the front shell 13 to slide.

Furthermore, at the initial stage of installation, the distance between the front shell 13 and the lining plate 12 can be relatively long, so that an operator can conveniently observe the positions of the claw 1301 and the first insertion tongue 1302, and further the claw 1301 and the first insertion tongue 1302 are accurately placed in the corresponding guide sliding grooves.

Then, during sliding along the guide sliding groove, the distance between the front shell 13 and the lining plate 12 gradually decreases, and the operator relies on the guiding function of the guide sliding groove to ensure that the first insertion tongue 1302 is inserted into the first positioning groove 1222 first.

Finally, the claws 1301 are caught in the catching grooves 1221 to firmly couple the front case 13 and the liner 12 together.

In other embodiments, in order to further improve the connection strength between the front shell 13 and the liner plate 12, the following structural improvement is made for the front shell 13.

The front case 13 includes:

a front panel 131;

a housing 132, wherein the housing 132 is provided with a second clamping portion 130, and the housing 132 is further provided with a second through hole 133;

the lining plate 12 is further provided with second screw holes 123, screws pass through the second through holes 133 and are screwed into the corresponding second screw holes 123, and the front panel 131 covers the second through holes 133 and is arranged on the front panel 131.

Specifically, for the front shell 13, which adopts a split design, the shell 132 is installed on the lining board 12 as a main body through the cooperation of the second clamping portion 130 and the first clamping portion 122. At the same time, the housing 132 and the backing plate 12 are further firmly connected together by screws. The screws connecting the shell 132 and the lining plate 12 are shielded by the front panel 131 to meet the design requirement of the front surface of the shell 1 without exposed screws.

In one embodiment, the housing 132 is provided with a groove 134, the second through hole 133 is located in the groove 134, and the front panel 131 is disposed in the groove 134.

Specifically, by providing the groove 134 on the front surface of the housing 132, the front panel 131 is placed by the groove 134, so that the front surface of the housing 1 is more flat. Meanwhile, as for the second through hole 133, the second through hole 133 is located in the groove 134, so that the second through hole 133 can be shielded by the front panel 131 after the front panel 131 is fitted into the groove 134.

In another embodiment, in order to achieve convenient and secure mounting of the front panel 131 on the housing 132, a slot 135 is further provided in the groove 134, and a second insertion tongue 136 is provided on the front panel 131, and is disposed in the corresponding slot 135.

Specifically, after the housing 132 is mounted on the liner 12, the front panel 131 is inserted into the corresponding slot 135 through the tongue configured thereon to complete the mounting. The tongue and the slot 135 are mutually matched, so that the front surface of the shell 1 realizes the appearance effect without exposed screws.

In order to further improve the connection reliability of the front panel 131, an extension portion 137 extending toward the liner 12 is provided on the front panel 131, a third screw hole (not shown) is provided on the extension portion 137, and a counter bore (not shown) is provided on the housing 132, through which a screw is screwed.

Specifically, in order to meet the requirement of the design, the extension 137 may be disposed at an upper portion or a lower portion of the front panel 131 according to the installation position of the housing 1. An extension 137 is formed at the bottom of the front panel 131, correspondingly, a counter bore is formed at the bottom of the housing 132, and after the front panel 131 is matched with the slot 135 through the tongue, the front panel is further connected and fixed from the bottom through a screw.

Preferably, a detachable plug (not shown) may be further disposed on the counter bore, and after the front panel 131 is fixed to the casing 132 by screws, the screw located in the counter bore is covered by the plug, so as to further satisfy the design that no screws are exposed from the front surface of the casing 1.

In some embodiments, in order to facilitate the operator to assemble the lining plate 12 and the rear shell 11 quickly on site, a mounting table 112 is provided on the inner wall of the rear shell 11, and the mounting table 112 is provided with the first threaded hole.

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

In another embodiment, in order to facilitate positioning of the assembled rear case 11 and the liner plate 12, a second positioning groove 113 may be provided on the mounting table 112, and an edge of the liner plate 12 is caught in the second positioning groove 113.

Specifically, during the process of assembling the rear shell 11 and the liner plate 12, the rear shell 11 and the liner plate 12 may be pre-assembled together by inserting the edge of the liner plate 12 into the second positioning groove 113.

Then, the relative position between the rear case 11 and the liner plate 12 is adjusted so that the first through holes 121 are aligned with the first screw holes 111.

Finally, a screw is passed through the first through hole 121 and screwed into the first screw hole 111, so that the rear case 11 and the backing plate 12 are securely and reliably assembled together.

In order to accurately position the positional relationship between the rear case 11 and the liner 12, the assembly accuracy is improved. A step surface 114 may be provided on the inner wall of the rear case 11, and a positioning rib 126 may be provided on the outer wall of the liner 12, the positioning rib 126 abutting against the step surface 114.

Specifically, in the process of assembling the rear shell 11 and the liner plate 12, reference is made to the above-mentioned process of pre-positioning through the positioning groove, so that the rear shell 11 and the liner plate 12 are pre-assembled together. Meanwhile, after the edge of the lining plate 12 is inserted into the positioning groove, the positioning rib 126 on the lining plate 12 abuts against the step surface 114, so that the rear shell 11 and the lining plate 12 are accurately positioned, and the overall assembly quality of the shell assembly is improved.

In one embodiment, the edge of the rear shell 11 is further provided with a rib 115, the rib 115 is located outside the step surface 114, and the edge of the front shell 13 is provided with an extending edge 127, and the extending edge 127 surrounds the rib 115.

Specifically, the front shell 13 can cover the whole outer surface of the lining plate 12, and the front shell 13 can cover the whole lining plate 12 outside the lining plate 12, so that the visual effect of the appearance is optimized. Meanwhile, for the blocking rib 115 formed on the edge of the rear shell 11, on one hand, when the rear shell is assembled, the blocking rib 115 can be matched with the extension edge 127 for pre-positioning, so that the assembling efficiency and the assembling accuracy are improved; on the other hand, the blocking rib 115 is shielded by the extending edge 127 formed at the edge of the front shell 13, which is more beneficial to improving the overall appearance effect.

In a preferred embodiment, for the butt-joint region between the front shell 13 and the rear shell 11, the edge of the front shell 13 is designed to be aligned with the edge of the rear shell 11, so as to reduce the size of the joint gap generated between the front shell 13 and the rear shell 11 at the butt-joint region.

In addition, the number of connecting points between the rear shell 11 and the lining plate 12 and the number of connecting points between the front shell 13 and the lining plate 12 are designed to correspond to the overall size of the housing assembly.

For example: a plurality of mounting platforms 112 may be provided at the edge of the rear case 11, and the plurality of mounting platforms 112 may be distributed along the edge of the rear case 11.

Correspondingly, the backing plate 12 is provided with a number of first through holes 121 corresponding to the number of the mounting bases 112, so that the rear case 11 and the backing plate 12 are fixedly connected by a plurality of screws.

Similarly, the number of the clamping connection between the front shell 13 and the lining plate 12 is also provided in plural, and is not limited herein.

Through adopting the welt with will preceding shell and backshell indirect linking together, through the inseparable linking together of screw between welt and the backshell to satisfy the overall structure intensity requirement of shell, and preceding shell passes through the mode and the welt of joint and is connected, preceding shell will cover the welt and then shelter from the screw, makes the whole effect of shell realize no exposed outward appearance of screw, has optimized the whole outward appearance of shell, in order to improve user experience nature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, schematic representations of the above terms 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.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the corresponding claims.

Claims (10)

1. A flat bladder, comprising:

the inner container is provided with a pipe seat in an integrated structure, and the pipe seat is arranged on the cambered surface of the inner container and extends towards the outside of the inner container;

the water pipe assembly comprises an insulating pipe and a water pipe, and the water pipe is inserted into the insulating pipe;

the insulating pipe is arranged on the pipe seat, and the water pipe is inserted into the pipe seat and extends into the inner container.

2. The flat inner container according to claim 1, wherein said inner container includes two container shells, said container shells are integrally formed into an arc-shaped structure, and at least one of said container shells is provided with said tube seat.

3. The flat bladder as claimed in claim 2, wherein said bladder shell is punched and flanged to form said tube seats extending outwardly.

4. The flat liner according to any one of claims 1 to 3, wherein a connecting pipe is provided on the pipe base, and an internal thread is provided in the connecting pipe; one end of the insulating tube is provided with a first embedded part, the first embedded part is of a cylindrical structure, an external thread is formed on the outer periphery of the first embedded part, and the first embedded part is in threaded connection with the internal thread.

5. The flat liner according to claim 4, wherein a sealing ring is further sleeved on the first insert, and the sealing ring is squeezed between the connecting pipe and the insulating pipe.

6. The flat inner container as claimed in claim 4, wherein a second insert is provided at the other end of the insulating tube, the second insert having a cylindrical structure, and an outer circumferential ring of the second insert is also formed with an external thread.

7. The flat liner according to claim 1, wherein a sleeve is further disposed outside the water pipe, and a plurality of through holes are disposed on a wall of the sleeve.

8. The flat inner container according to claim 6, wherein a functional filter material is filled between the sleeve and the water pipe, and a first annular plug is arranged between the upper end of the sleeve and the water pipe.

9. The flat liner according to claim 8, wherein a lower end portion of said sleeve is connected to said insulating tube, or a lower end portion of said sleeve is connected to said first insert; or a second annular plug is arranged between the lower end part of the sleeve and the water pipe.

10. An electric water heater comprising a housing, characterized in that it further comprises a flat inner container according to any one of claims 1-9, said flat inner container being arranged in said housing, and an insulating layer being arranged between said flat inner container and said housing.

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