CN108507176B

CN108507176B - Electric water heater inner container and water heater

Info

Publication number: CN108507176B
Application number: CN201710116589.5A
Authority: CN
Inventors: 曾云; 曲绍鹤; 申勇兵
Original assignee: Midea Group Co Ltd
Current assignee: Midea Group Co Ltd
Priority date: 2017-02-28
Filing date: 2017-02-28
Publication date: 2022-10-14
Anticipated expiration: 2037-02-28
Also published as: CN108507176A

Abstract

The invention discloses an electric water heater liner and a water heater, wherein the electric water heater liner comprises a non-metal shell, a metal material heat exchange pipeline and an electromagnetic coil, wherein the shell is provided with an accommodating cavity, and a phase change body is accommodated in the accommodating cavity; the heat exchange pipeline is inserted in the phase change body; the electromagnetic coil is wound on the outer wall of the shell; the electromagnetic coil performs excitation heating on the phase change body and/or the heat exchange pipeline, and the excitation heating frequency is 10 kilohertz to 300 kilohertz. The inner container of the electric water heater of the technical scheme of the invention can improve the heat storage speed.

Description

Electric water heater inner container and water heater

Technical Field

The invention relates to the field of heat energy equipment, in particular to an inner container of an electric water heater and the water heater.

Background

The water heater generally has a heat storage function, and the function stores heat through a heat storage device so that a user can obtain hot water in time when using the hot water. There are various types of heat storage devices, and a phase change heat storage material is highly preferred because of its high heat storage density, and the application of a phase change material as a heat storage material is becoming more and more widespread.

However, in the conventional water heater, water in the inner container is heated by a direct contact heating device such as a heating rod, water and electricity of the water heater are in contact with each other, and the safety of the water heater is poor. In addition, the phase-change material is easily deteriorated due to direct high-temperature heating of the phase-change material, the inner container of the existing electric water heater is difficult to directly heat the phase-change body by arranging a heating device, the temperature of the inner container of the electric water heater is slowly increased, and the heat storage speed is not high.

Disclosure of Invention

The invention mainly aims to provide an inner container of an electric water heater and a water heater, and aims to improve the safety of the water heater and accelerate the heat storage speed of the inner container of the electric water heater.

In order to achieve the purpose, the inner container of the electric water heater provided by the invention comprises a non-metal shell, a metal material heat exchange pipeline and an electromagnetic coil, wherein the shell is provided with an accommodating cavity, and a phase variation body is accommodated in the accommodating cavity; the heat exchange pipeline is inserted in the phase change body; the electromagnetic coil is wound on the outer wall of the shell; the electromagnetic coil performs excitation heating on the phase change body and/or the heat exchange pipeline, and the excitation heating frequency is 10 kilohertz to 300 kilohertz.

Preferably, the heat exchange pipeline is a coil pipe, the heat exchange pipeline is provided with a plurality of bending sections and a plurality of direct current sections, the bending sections are bent by 180 degrees, and heat exchange gaps are arranged between the direct current sections.

Preferably, the housing is cylindrically arranged, the inner diameter of the accommodating cavity is matched with the outer contour of the heat exchange pipeline, and the electromagnetic coil is axially arranged in a direction perpendicular to the length direction of the direct current section.

Preferably, fins are arranged between the straight flow sections and are arranged at intervals along the length direction of the straight flow sections.

Preferably, the heat exchange pipeline is a water pipe, the heat exchange pipeline is provided with a water inlet and a water outlet, and the bottom of the shell is provided with two mounting holes for the water inlet and the water outlet to penetrate through.

Preferably, the outer wall of the housing is provided with a winding structure, and the electromagnetic coil is wound on the housing through the winding structure.

Preferably, the casing is the column setting, the wire winding structure is many vertical protruding muscle, many vertical protruding muscle is followed casing circumference evenly distributed, many vertical protruding muscle with casing integrated into one piece.

Preferably, the electric water heater inner container further comprises a magnetic strip used for gathering the magnetic induction lines, an installation position is arranged on the inner bottom wall of the shell, and the magnetic strip is installed in the containing cavity through the installation position.

Preferably, a heat insulation piece is arranged between the shell and the electromagnetic coil, and the heat insulation piece is made of aerogel.

The invention also provides a water heater, which comprises an inner container of the electric water heater, wherein the inner container of the electric water heater comprises a non-metal shell, a metal material heat exchange pipeline and an electromagnetic coil, the shell is provided with an accommodating cavity, and a phase change body is accommodated in the accommodating cavity; the heat exchange pipeline is inserted in the phase change body in a penetrating way; the electromagnetic coil is wound on the outer wall of the shell; the electromagnetic coil performs excitation heating on the phase change body and/or the heat exchange pipeline, and the excitation heating frequency is 10 kilohertz to 300 kilohertz.

The electromagnetic coil is arranged outside the shell of the liner of the electric water heater to perform excitation heating on the phase change body and/or the heat exchange pipeline accommodated in the plastic shell, so that the phase change body and/or the heat exchange pipeline can perform heat storage by absorbing heat generated by eddy current in the phase change body and/or the heat exchange pipeline, a power supply required by heating is separated from water accommodated in the electric water heater, and the safety performance of the electric water heater is improved. The non-metal shell of the inner container of the electric water heater is provided with an accommodating cavity, the accommodating cavity is used for accommodating a phase change body, the phase change body is in heat exchange through contact with a heat exchange pipeline, and in order to guarantee heat exchange efficiency, the heat exchange pipeline is inserted into the phase change body to guarantee good contact heat exchange. For the purpose of improving the heat storage speed, the inner container of the electric water heater is provided with an electromagnetic coil which is wound on the outer wall of the shell and used for carrying out excitation heating on the phase change body and/or the heat exchange pipeline in the accommodating cavity. The high-frequency alternating current is applied to the electromagnetic coil, so that high-frequency alternating magnetic induction lines are generated, the high-frequency alternating magnetic induction lines pass through the phase change body and/or the heat exchange pipeline, alternating eddy currents are generated in the phase change body and/or the heat exchange pipeline, and the phase change body and/or the heat exchange pipeline absorb heat generated by the eddy currents in the phase change body and/or the heat exchange pipeline to store heat, so that the temperature is quickly increased, and the heat storage speed is increased.

Drawings

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

FIG. 1 is a schematic view of an internal structure of an inner container of an electric water heater according to an embodiment of the present invention;

FIG. 2 is a schematic view of an embodiment of an inner container of an electric water heater according to the present invention;

FIG. 3 is a schematic view of the internal structure of an inner container of an electric water heater according to an embodiment of the present invention;

fig. 4 is an enlarged view of a portion a of fig. 3.

The reference numbers indicate:

reference numerals	Name(s)	Reference numerals	Name(s)
				10	Shell body	22	DC section
11	Containing cavity	23	Water inlet
				12	Mounting hole	24	Water outlet
13	Winding structure	30	Electromagnetic coil
				131	Vertical convex rib	40	Phase change body
14	Mounting position	50	Fin
				141	Positioning part	21	Bending section
142	Fixing part	70	Heat insulation piece
				20	Heat exchange pipeline	G	Gap between the two plates

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; etc.) are involved in the embodiment of the present invention, the directional indications are only used for explaining the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an inner container of an electric water heater.

In the embodiments of the present invention, as shown in fig. 1 and 2, solid lines with arrows indicate planes or spaces such as faces, cavities, holes, etc. The inner container of the electric water heater comprises a non-metal shell 10, a metal material heat exchange pipeline 20 and an electromagnetic coil 30, wherein the shell 10 is provided with an accommodating cavity 11, and a phase change body 40 is arranged in the accommodating cavity 11; the heat exchange pipe 20 is inserted in the phase body 40; the electromagnetic coil 30 is wound on the outer wall of the shell 10; the electromagnetic coil 30 heats the phase change body 40 with excitation at a frequency of 10 khz to 300 khz.

Specifically, in order to rapidly raise the temperature of the liner of the electric water heater, referring to fig. 1, in an embodiment, the housing 10 of the liner of the electric water heater has a receiving cavity 11, the receiving cavity 11 is used for receiving the phase change body 40, and the larger the capacity of the receiving cavity 11 is, the more the phase change body 40 can be received correspondingly. The phase-change body 40 exchanges heat through contact with the heat exchange pipe 20, and stores the heat in the accommodating chamber 11 after the phase-change body 40 absorbs the heat; when the heat of the inner container of the electric water heater needs to be used, the heat of the phase change body 40 is conducted out of the inner container of the electric water heater in a heat exchange mode to release heat to the outside. The metal material heat exchange pipe 20 generally has a heat exchange medium therein, and the heat exchange medium may be water or a refrigerant, and in order to ensure the heat exchange efficiency, the metal material heat exchange pipe 20 is inserted into the phase change body 40 to ensure good contact heat exchange. The contact heat exchange has higher heat exchange efficiency compared with the radiation heat exchange. The inner container of the electric water heater is provided with an electromagnetic coil 30 for improving the heat storage speed, and the electromagnetic coil 30 is wound on the outer wall of the shell 10 and is used for exciting and heating the phase body 40 and/or the heat exchange pipe 20 in the accommodating cavity 11. It should be noted that the electromagnetic coil 30 is an inductive coil, and has the characteristics of high magnetic induction intensity, small heat generation amount, and the like compared with a resistive coil, and thus can be wound around a non-metal housing. The electromagnetic coil 30 can generate magnetic induction lines by various winding methods, such as winding the electromagnetic coil 30 into a rectangle, a circle, a spiral, and other rings, and those skilled in the art can obtain corresponding solutions by using the embodiments and the drawings of the present invention, which are not described herein. A high-frequency alternating current having a frequency of 10 khz to 300 khz is applied to the electromagnetic coil 30. Therefore, high-frequency alternating magnetic induction lines are generated in the electromagnetic coil 30, the high-frequency alternating magnetic induction lines pass through the phase change body 40 and/or the heat exchange pipeline 20, alternating eddy currents are generated in the phase change body 40 and/or the heat exchange pipeline 20, the phase change body 40 and/or the heat exchange pipeline 20 absorb heat generated by the eddy currents to store heat, a power supply required by heating and water contained in the electric water heater are arranged, the safety performance of the electric water heater is improved, the temperature can be quickly raised, and the heat storage speed is improved.

For the purpose of improving the heat exchange efficiency of the inner container of the electric water heater, referring to fig. 1, in this embodiment, the heat exchange pipe 20 is a coil, and the coil may be spiral or grid-shaped, etc. to increase the heat exchange contact area between the heat exchange pipe 20 and the phase change body 40, so that the heat exchange speed in the inner container of the electric water heater is faster. For the purpose of reducing the production cost, preferably, the heat exchange pipe 20 has a plurality of bending sections 21 and a plurality of straight sections 22, the bending sections 21 are connected to the two straight sections 22 after being bent by 180 degrees, so that the heat exchange pipe 20 has a higher standardization degree, and a heat exchange gap is provided between the straight sections 22 to adjust the distance between the straight sections 22 and prevent the adjacent two straight sections 22 from contacting with each other and affecting the heat exchange efficiency. The heat exchange gaps between the straight flow sections 22 are set according to the volume in the thermal storage device to obtain a large contact area. The heat exchange efficiency in the heat storage device is further improved, the fins 50 are arranged between the direct current sections 22, the fins 50 can be separately arranged sheets or plates for connecting the direct current sections 22, the fins 50 are arranged at intervals along the length direction of the direct current sections 22, so that a certain gap G is formed between every two adjacent fins 50, and the phase change body is filled in the gap G between every two adjacent fins 50, so that the heat exchange area is further increased through contact heat exchange with the fins 50, and the heat exchange efficiency is improved. In order to further improve the heat exchange efficiency, in a preferred embodiment, the housing 10 is cylindrical, and the inner diameter of the housing 10 is adapted to the heat exchange pipe 20, where the adaptation refers to: the outer profile of the heat exchange tube 20 may be accommodated in the cylindrical housing 10, and the straight flow section 22 of the heat exchange tube 20 may be radially accommodated in the housing 10, so that the electromagnetic coil 30 is axially arranged perpendicular to the length direction of the straight flow section 22. By the arrangement mode, the magnetic heating area of the heat exchange pipeline 20 can be increased, and the heat exchange efficiency is improved.

In order to utilize the heat of the water heater, referring to fig. 1, in this embodiment, the heat exchange pipe 20 is a water pipe, and the water pipe is communicated with a heating device or a heat exchange device of the water heater, so that the heat of the water heater can exchange heat with the phase change body 40 through the water pipe. The heat exchange pipeline 20 is provided with a water inlet 23 and a water outlet 24, and water input from the water inlet 23 is discharged out of the inner container of the electric water heater through the water outlet 24 after heat exchange is carried out between the water and the phase change body 40 through the heat exchange pipeline 20. The bottom of the housing 10 has mounting holes 12 for the water inlet 23 and the water outlet 24 to pass through, so as to facilitate the installation of the heat exchange pipe 20 in the accommodating chamber 11, wherein the two mounting holes 12 may be arranged at a longer distance to prevent heat from being conducted between the two mounting holes 12.

In order to facilitate the electromagnetic coil 30 to be wound on the outer wall of the casing 10, referring to fig. 1 and 2, in the present embodiment, a winding structure 13 for winding the electromagnetic coil 30 is provided on the outer wall of the casing 10, the winding structure 13 may have various shapes, such as a spiral shape, a ring shape, other winding manners, and the like, and the winding structure may be arranged in series or may be arranged at intervals. Those skilled in the art can obtain corresponding solutions through the embodiments of the present invention and the drawings thereof, which are not described herein in detail. The electromagnetic coil 30 is wound on the housing 10 through the winding structure 13, and when the electromagnetic coil 30 is energized, magnetic induction lines generated by the electromagnetic coil 30 wound outside the housing 10 pass through the accommodating chamber 11 relatively intensively, so as to ensure the magnetic field intensity in the accommodating chamber 11. In order to wind more electromagnetic coils 30, the housing 10 is arranged in a column shape, and a plurality of groups of electromagnetic coils 30 can be wound on the housing 10 arranged in the column shape along the length direction, and the more the electromagnetic coils 30 are, the denser the generated magnetic induction lines are, which is beneficial to improving the heating speed. For the sake of manufacturing convenience, the winding structure 13 is a plurality of vertical ribs 131, the vertical ribs 131 are simple in structure, and the electromagnetic coil 30 can be more intuitively wound on the cylindrical housing 10, and the vertical ribs 131 provide sufficient support for the electromagnetic coil 30. Many vertical protruding muscle 131 are at casing 10 circumference evenly distributed, can increase vertical protruding muscle 131 around putting the ability, simultaneously, make things convenient for solenoid 30 to pass vertical protruding muscle 131 and wind and put, strengthen the steadiness after solenoid 30 winds. The plurality of vertical ribs 131 are integrally formed with the housing 10 for reducing the manufacturing cost, and the integral forming manner described herein may be various, such as forming by a mold or integral printing, etc.

For the purpose of keeping the temperature inside the liner of the electric water heater, referring to fig. 3 and 4, in the embodiment of the present invention, the heat insulating member 70 is disposed on the outer surface of the housing 10, and the type and material of the heat insulating member 70 are not particularly limited, but asbestos, heat insulating felt, or other material with low thermal conductivity may be used. Those skilled in the art can obtain corresponding technical solutions through the embodiments of the present invention and the accompanying drawings, which are not described herein in detail. Of course, the heat insulation element 70 may be made into a heat insulation sleeve, a heat insulation coating, a heat insulation ring or other shapes capable of covering the surface of the housing to achieve the purpose of heat insulation and prevent the electromagnetic coil 30 from melting and damaging the housing 10. When the phase change body 40 in the accommodating chamber 11 is in contact with the housing 10 for heat exchange, the heat of the housing 10 is blocked by the heat insulation member 70 and is difficult to exchange heat with the outside. The heat stays in the shell 10, so that the temperature difference between the phase change body 40 and the shell 10 is reduced, the heat transfer speed from the phase change body 40 to the shell 10 is reduced, the temperature change of the phase change body 40 is further slowed down, and the heat insulation effect of the liner of the electric water heater is improved. In order to better prevent the shell 10 from exchanging heat with the outside, the heat loss in the shell 10 is avoided, and the heat storage effect of the liner of the electric water heater is better. In this embodiment, in order to improve the heat insulation effect, the heat insulation member 70 is aerogel. The aerogel has the characteristic of low heat conductivity coefficient and has a good blocking effect on heat conduction. Meanwhile, the thermal insulation member 70 is made of aerogel, and the aerogel material has the characteristic of flexibility, and can be attached to the outer wall surface of the housing 10 to generate certain deformation, so that the aerogel can be in full contact with the outer wall surface, and a good thermal insulation effect is achieved. Moreover, the aerogel has the characteristics of light weight, fire resistance, environmental protection and the like, and is suitable for being used as a heat insulation material of a heat storage device so as to reduce the overall weight of the inner container of the electric water heater.

The invention also provides a water heater, which comprises the liner of the electric water heater, the specific structure of the liner of the electric water heater refers to the embodiments, and the water heater adopts all the technical schemes of all the embodiments, so that the water heater also has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An inner container of an electric water heater is characterized by comprising:

the non-metal shell is provided with an accommodating cavity, a phase change body is accommodated in the accommodating cavity, and the phase change body comprises an electromagnetic heating material;

the heat exchange pipeline is inserted into the phase change body in a penetrating manner, and is a water pipe;

the electromagnetic coil is wound on the outer wall of the shell; the electromagnetic coil performs excitation heating on the phase change body and the heat exchange pipeline, and the excitation heating frequency is 10 kilohertz to 300 kilohertz.

2. The liner of claim 1, wherein the heat exchange tube is in a coil arrangement, the heat exchange tube has a plurality of bending sections and a plurality of straight flow sections, the bending sections are bent by 180 degrees, and a heat exchange gap is formed between the straight flow sections.

3. The liner of claim 2, wherein the casing is disposed in a cylindrical shape, the inner diameter of the casing is adapted to the heat exchange pipe, and the electromagnetic coil is disposed axially perpendicular to the length direction of the dc section.

4. The liner of claim 3, wherein fins are disposed between the straight flow sections, and the fins are spaced along the length of the straight flow sections.

5. The liner of claim 1, wherein the heat exchange pipe has a water inlet and a water outlet, and the bottom of the casing has two mounting holes for the water inlet and the water outlet to pass through.

6. The liner of claim 1, wherein the outer wall of the casing is provided with a winding structure, and the electromagnetic coil is wound on the casing through the winding structure.

7. The electric water heater liner as claimed in claim 6, wherein the winding structure is a plurality of vertical ribs, the plurality of vertical ribs are uniformly distributed along the circumference of the shell, and the plurality of vertical ribs and the shell are integrally formed.

8. The liner of the electric water heater as claimed in claim 1, further comprising a magnetic strip for gathering the magnetic induction lines, wherein the inner bottom wall of the shell is provided with an installation position, and the magnetic strip is installed in the accommodating cavity through the installation position.

9. The liner of any one of claims 1 to 8, wherein a thermal insulation member is disposed between the casing and the electromagnetic coil, and the thermal insulation member is aerogel.

10. A water heater characterized in that it comprises an inner container of an electric water heater as claimed in any one of claims 1 to 9.