CN109724254B - Inner container assembly and liquid heater - Google Patents
Inner container assembly and liquid heater Download PDFInfo
- Publication number
- CN109724254B CN109724254B CN201711041137.1A CN201711041137A CN109724254B CN 109724254 B CN109724254 B CN 109724254B CN 201711041137 A CN201711041137 A CN 201711041137A CN 109724254 B CN109724254 B CN 109724254B
- Authority
- CN
- China
- Prior art keywords
- heat conduction
- coating
- liner
- low
- thermal conductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Cookers (AREA)
Abstract
The invention discloses a liner assembly and a liquid heater, wherein the liner assembly comprises a liner, an electric heating tube and a low heat conduction coating, the low heat conduction coating is attached to the outer surface of the bottom wall of the liner, the porosity of the low heat conduction coating is 10-40%, the high heat conduction layer is attached to the outer surface of the low heat conduction coating, the heat conduction coefficient of the high heat conduction layer is larger than or equal to 100W/m.k, and the electric heating tube is mounted on the outer surface of the high heat conduction layer. In the liquid heater provided by the invention, the low heat conduction coating is arranged between the electric heating tube and the outer surface of the bottom wall of the liner, so that the transmission speed of heat along the thickness direction of the bottom wall of the liner is slowed down, and the problems that the power density of the contact area of the existing liner and the electric heating tube is higher and larger noise is generated are solved.
Description
Technical Field
The invention relates to the technical field of domestic appliances, in particular to an inner container assembly and a liquid heater.
Background
At present, liquid heaters in the market, such as electric heating kettles, are mostly heated by electric heating tubes, please refer to fig. 1, the electric heating tubes are mostly in a surrounding shape, and a connection area between the electric heating tubes and the bottom wall of the kettle body is small, so that the connection area is intensively heated, the heating effect far away from the connection area is poor, the local power density is high, a large amount of small bubbles are locally generated, the bubbles are more easily separated from the bottom wall, and explosion in water is caused, so that great noise is generated.
Disclosure of Invention
The invention mainly aims to provide a liner assembly of a liquid heater and the liquid heater, and aims to solve the problems that the existing liquid heater is high in local power density, and large amount of small steam bubbles are locally generated to explode in water to generate large noise.
In order to achieve the above object, the present invention provides an inner container assembly for a liquid heater, the inner container assembly:
an inner container;
the low heat conduction coating is attached to the outer surface of the bottom wall of the inner container, and the porosity of the low heat conduction coating is 10-40%;
the high heat conduction layer covers the low heat conduction coating, and the heat conduction coefficient of the high heat conduction layer is greater than or equal to 100W/m.k; and the number of the first and second groups,
and the electric heating pipe is arranged on the outer surface of the high heat conduction layer.
Preferably, the low thermal conductive coating has a porosity of 15% to 35%.
Preferably, the low thermal conductive coating has a porosity of 16% to 18%.
Preferably, the thickness of the low thermal conductive coating is 0.1mm to 1.5 mm.
Preferably, the material of the low thermal conductive coating is Al, Fe, 304 stainless steel or 430 stainless steel.
Preferably, the high thermal conductive layer is a metal thermal conductive plate.
Preferably, when the thickness of the high thermal conductive layer is 0.5mm to 2 mm.
Preferably, the low heat conduction coating is annular, and the middle part of the high heat conduction layer is provided with a boss which is embedded into the middle through hole of the low heat conduction coating and is directly in thermal contact with the outer surface of the bottom wall of the inner container.
Preferably, the low heat conduction coating covers the whole outer surface of the bottom wall of the liner, and the high heat conduction layer at least covers the electric heating tube and the surrounding peripheral area thereof.
Preferably, the high thermal conductive layer covers the entire low thermal conductive coating and extends to at least the outer surface of the bottom of the sidewall of the liner.
The invention also provides a liquid heater, which comprises a liner assembly, wherein the liner assembly comprises:
an inner container;
the low heat conduction coating is attached to the outer surface of the bottom wall of the inner container, and the porosity of the low heat conduction coating is 10-40%;
the high heat conduction layer covers the low heat conduction coating, and the heat conduction coefficient of the high heat conduction layer is greater than or equal to 100W/m.k; and the number of the first and second groups,
and the electric heating pipe is arranged on the outer surface of the high heat conduction layer.
According to the technical scheme provided by the invention, the high heat conduction layer can not only transfer the heat of the electric heating tube to the surface of the whole low heat conduction coating as soon as possible, but also prevent the heat of the electric heating tube from being radiated and damaged. The low heat conduction coating has the porosity of 10-40%, so that the speed of heat transfer along the thickness direction of the bottom wall of the liner can be reduced, and the time of heat transfer along the thickness direction of the bottom wall of the liner is correspondingly increased. Because the heat transfer time of the electric heating tube along the thickness direction of the bottom wall of the inner container is prolonged, the heat transferred from the contact area of the inner container and the electric heating tube to the plane of the bottom wall of the inner container is correspondingly increased, so that the power density of the contact area of the inner container and the electric heating tube is reduced, the quantity of bubbles generated in the contact area of the inner container and the electric heating tube is reduced, and the noise generated by the inner container assembly in the heating process is further reduced.
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 a heating principle of a bladder assembly of a conventional liquid heater;
fig. 2 is a schematic perspective view of a liquid heater according to a first embodiment of the present invention;
FIG. 3 is a schematic perspective view of a first embodiment of a bladder assembly according to the present invention;
FIG. 4 is a schematic view of the heating principle of the liner assembly of FIG. 3;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic structural view of a second embodiment of the liner assembly provided in the present invention;
FIG. 7 is an enlarged partial view of FIG. 6 at B;
FIG. 8 is a schematic structural view of a third embodiment of a bladder assembly provided in accordance with the present invention;
fig. 9 is a partially enlarged schematic view of C in fig. 8.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
4 | Low thermal conductivity coating |
| 1 | |
200 | |
| 11 | |
5 | |
| 12 | |
6 | Cover- |
| 2 | |
7 | Handle (CN) |
| 21 | |
8 | Switch with a switch body |
| 3 | High |
9 | |
| 31 | |
10 | Outer casing |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
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 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 indication is involved in the embodiment of the present invention, the directional indication is only used for explaining the relative positional relationship, the motion situation, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.
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 such 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 a liquid heater, which can be an electric kettle, an electric thermos bottle or a health preserving kettle, and the like, and the electric kettle is taken as an example to be introduced below. Fig. 2 is a first embodiment of the liquid heater provided by the present invention, the liquid heater including a bladder assembly.
Referring to fig. 2, in the present embodiment, the liquid heater 200 includes a liner assembly, a lid 5, a lid opening button 6, a handle 7, a switch 8, a base 9, and a housing 10, the liner assembly is disposed in the housing 10, the lid 5 is controlled by the lid opening button 6, the liner assembly is opened and closed, the kettle body can be lifted by the handle 7, and the liner assembly is placed on the base 9 to supply power to the liner assembly.
Referring to fig. 3 to 5, a first embodiment of a liner assembly according to the present invention is shown, and referring to fig. 3 to 5, a liner assembly 100 includes a liner 1, a low thermal conductive coating 4, a high thermal conductive layer 3 and an electric heating tube 2, the low thermal conductive coating 4 is attached to an outer surface of a bottom wall 11 of the liner 1, a porosity of the low thermal conductive coating 4 is 10% to 40%, the high thermal conductive layer 3 is attached to an outer surface of the low thermal conductive coating 4, a thermal conductivity of the high thermal conductive layer 3 is greater than or equal to 100W/m.k, and the electric heating tube 2 is mounted on an outer surface of the high thermal conductive layer 3.
In the technical scheme provided by the invention, the high heat conduction layer 3 can not only transfer the heat of the electric heating tube 2 to the surface of the whole low heat conduction coating 4 as soon as possible, but also prevent the heat of the electric heating tube 2 from being radiated and damaged. The low heat conduction coating 4 has a porosity of 10% to 40%, so that the speed of heat transfer along the thickness direction of the bottom wall 11 of the liner 1 can be reduced, and the time of heat transfer along the thickness direction of the bottom wall 11 of the liner 1 is correspondingly increased. Because the heat transfer time of the electrothermal tube 2 along the thickness direction of the bottom wall 11 of the liner 1 is prolonged, the heat transferred from the contact area of the liner 1 and the electrothermal tube 2 to the plane of the bottom wall 11 of the liner 1 is correspondingly increased, so that the power density of the contact area of the liner 1 and the electrothermal tube 2 is reduced, the quantity of bubbles generated in the contact area of the liner 1 and the electrothermal tube 2 is reduced, and the noise generated in the heating process of the liner assembly 100 is reduced.
In order to verify the effect of the porosity of the low thermal conductivity coating 4 on the noise, the present invention provides an experiment as follows:
experiment one
The experimental conditions are as follows: an electric heating kettle with heating power of 1800W is selected, the water quantity in the kettle is 1.3L-1.7L, the diameter is 100mm, and the lowest thermal efficiency value of the electric heating kettle is not less than 85%.
The experimental steps are as follows: 1. continuously boiling two pots of water full of scales outside the silencing chamber and pouring the water; 2. adding the maximum scale water quantity for the third time after cooling the kettle and placing the kettle in the middle of the test board; 3. the temperature sensor is arranged in the middle of the water level of the center of the kettle; 4. pressing a start key of the kettle and starting timing; 5. stopping timing measurement when the temperature of water in the kettle rises to a halt; 5. and eliminating a noise value with the sound power value less than or equal to 45dB, carrying out A weighting on the tested noise value, taking the average sound power as a main judgment value, and taking the maximum sound power as an auxiliary judgment value.
The existing electric kettle with the structure shown in fig. 1 is selected, the bottom wall 11 of the inner container 1 is made of 304 stainless steel, the porosity is 1%, the thickness is 0.5mm, and the measured experimental data are specifically shown in table 1 below.
TABLE 1
| Maximum acoustic power/dB | Average acoustic power/dB | Thermal efficiency value |
| 70.05 | 64.15 | 89.0％ |
An electric kettle with the structure shown in fig. 4 is selected, a low-heat-conduction coating 4 (with the diameter of 120mm, the thickness of 0.5mm and the material of Fe) and a high-heat-conduction coating 3 (with the diameter of 110mm, the material of Al, the thickness of 0.5mm and the heat conductivity coefficient of 237) are arranged, and the experimental data corresponding to the measured low-heat-conduction coating 4 when the porosity is different are shown in table 2 below.
TABLE 2
| Low thermal conductivity coating porosity | Maximum acoustic power/dB | Average acoustic power/dB | |
| 10％ | 57.38 | 55.27 | 88.4％ |
| 12％ | 56.55 | 54.39 | 88.1％ |
| 15％ | 55.47 | 54.25 | 87.5％ |
| 16％ | 53.96 | 52.84 | 87.4％ |
| 18％ | 53.17 | 51.95 | 87.1％ |
| 20％ | 52.46 | 51.37 | 86.7％ |
| 25％ | 51.87 | 50.97 | 86.5％ |
| 30％ | 51.13 | 50.23 | 86.2％ |
| 35％ | 50.78 | 49.97 | 85.8％ |
| 40％ | 50.76 | 49.96 | 85.1％ |
Comparing the data in table 1 and table 2, it can be seen that when the porosity of the low thermal conductive coating 4 is 10% to 40%, the average acoustic power of the noise generated when the liquid heater 200 operates is reduced by at least 8dB, the maximum acoustic power is reduced by at least 12dB, and the thermal efficiency of the liquid heater 200 is above 85%, which meets the use requirements and meets the safety regulations.
As can be seen from the data in table 2 alone, as the porosity of the low thermal conductive coating 4 gradually increases, the average acoustic power drop, the maximum acoustic power, and the thermal efficiency value all decrease. When the porosity of the low-heat-conduction coating 4 is increased from 12% to 15%, the average sound power is reduced by 1.24dB, the maximum sound power is reduced by 2.28dB, the heat efficiency value is only reduced by 0.2%, and the noise is reduced more obviously compared with the reduction amplitude of the heat efficiency value; when the porosity of the low thermal conductive coating 4 is increased from 35% to 40%, the average acoustic power is reduced by 0.01dB, the maximum acoustic power is reduced by 0.02dB, the thermal efficiency value is reduced by 0.7%, the noise is not greatly reduced, but the reduction range of the thermal efficiency value is relatively large. Therefore, when the porosity of the low thermal conductive coating 4 is 15% to 35%, the average sound power is reduced by at least 11dB, the maximum sound power is reduced by at least 15dB, the noise reduction amplitude is relatively large, and the comprehensive performance is good.
As can be seen from the data in table 2 alone, when the porosity of the low thermal conductive coating 4 is 16% to 18%, the average acoustic power is reduced by at least 11.3dB, the maximum acoustic power is reduced by at least 16dB, and the thermal efficiency at this time is within 2 percentage points of the thermal efficiency of the existing product.
The porosity (the higher the porosity is, the poorer the heat conductivity is) of the low heat conduction coating 4 is arranged to slow down the speed of heat transfer along the thickness direction of the bottom wall 11 of the liner 1, in order to form the low heat conduction coating 4 with the porosity in the range, the material of the low heat conduction coating 4 can be selected from Al, Fe, 304 stainless steel or 430 stainless steel, the low heat conduction coating 4 is formed by selecting the materials, the practical use condition of the product is considered, in addition, when the porosity of the low heat conduction coating 4 is controlled, the structure is relatively stable, the forming is easy, and the cost performance is relatively high.
Except for the porosity and material of the low thermal conductive coating 4, the thickness of the low thermal conductive coating 4 also has an influence on the speed of slowing down the heat transfer along the thickness direction of the bottom wall 11 of the liner 1, in the first embodiment, the thickness of the low thermal conductive coating 4 is 0.1mm to 1.5mm, the low thermal conductive coating 4 is too thin and is easy to fall off, and the noise reduction effect cannot be achieved, and the noise reduction effect is not good, in the first embodiment, through the limitation on the thickness range of the low thermal conductive coating 4, on the premise of ensuring that the noise of the liquid heater 200 during operation can be well reduced, the waste of cost caused by the excessively thick low thermal conductive coating 4 can be avoided, and the problem of the heating efficiency of the liquid heater 200 is also influenced, of course, the thickness of the low thermal conductive coating 4 is related to the porosity of the low thermal conductive coating 4, the larger the porosity is, the thinner the thickness of the low thermal conductive coating 4.
In order to verify the effect of the thickness of the low thermal conductivity coating 4 on the noise, the design gives an experiment:
experiment two
The experimental conditions are as follows: the same as in the first experiment.
The experimental steps are as follows: the same as in the first experiment.
An electric kettle with the structure shown in fig. 4 is selected, a low-heat-conduction coating 4 (with the diameter of 120mm, the material of Fe and the porosity of 15%) and a high-heat-conduction coating 3 (with the diameter of 110mm, the material of Al, the thickness of 0.5mm, and the heat conductivity coefficient of 237) are arranged, and the experimental data corresponding to the measured different thicknesses of the low-heat-conduction coating 4 are specifically shown in table 3 below.
TABLE 3
| Thickness mm of low heat-conducting coating | Maximum acoustic power/dB | Average acoustic power/dB | Thermal efficiency value |
| 0.1 | 62.89 | 60.14 | 88.7％ |
| 0.3 | 56.57 | 54.89 | 88.4％ |
| 0.5 | 55.17 | 53.15 | 88.0％ |
| 0.7 | 53.83 | 50194 | 87.5％ |
| 1.0 | 50.96 | 48.95 | 86.7％ |
| 1.2 | 49.55 | 47.54 | 86.2％ |
| 1.5 | 48.77 | 47.26 | 85.3％ |
Comparing the data in table 1 and table 3, it can be seen that when the thickness of the low thermal conductive coating 4 is 0.1mm to 1.5mm, the average acoustic power is reduced by at least 4.01dB, the maximum acoustic power is reduced by at least 7dB, and the thermal efficiency values are all above 85%, which meets the use requirements and conforms to the safety regulations.
It can be seen from the data in table 3 that, as the thickness of the low thermal conductive coating 4 is gradually increased, the average acoustic power, the maximum acoustic power and the thermal efficiency are all decreased, and when the thickness of the low thermal conductive coating 4 is 0.3mm to 0.7mm, the difference between the thermal efficiency and the thermal efficiency of the existing product is within 1.5 percentage points, the heating effect is good, the noise is decreased by at least 9dB, at most 13dB, and the coating cost with the thickness in this range is relatively moderate.
As described above, the low thermal conductive coating 4 has a poor thermal conductivity to slow down the heat transfer, so as to avoid the direct contact between the low thermal conductive coating 4 and the electrical heating tube 2, which affects the heat transfer of the electrical heating tube 2 to the outside, causing the dry burning of the electrical heating tube 2, and affecting the service life of the electrical heating tube 2, please refer to fig. 4 and 5, the outer surface of the low thermal conductive coating 4 is further attached with the high thermal conductive layer 3, the thermal conductivity of the high thermal conductive layer 3 is greater than or equal to 100W/m.k (for example, the thermal conductivity of 6061 aluminum alloy is 155W/m.k), the electrical heating tube 2 is mounted on the high thermal conductive layer 3, the arrangement of the high thermal conductive layer 3 avoids the direct contact between the low thermal conductive coating 4 and the electrical heating tube 2, which is not only beneficial to the rapid heat transfer of the electrical heating tube 2 to the outside, but, in the first embodiment, the high heat conducting layer 3 is an aluminum coating, and the heat conductivity coefficient is greater than or equal to 200W/m.k, and reaches 237W/m.k, so that the heat of the electrothermal tube 2 can be better transferred to the outside.
To obtain the high thermal conductivity layer 3 within the above thermal conductivity range, in the first embodiment, the high thermal conductivity layer 3 is made of a material with high thermal conductivity, and the high thermal conductivity layer 3 may be made of copper with a thermal conductivity of 401 in addition to the above aluminum.
Except that the material and the heat conductivity coefficient of the high heat conduction layer 3 can influence the external heat transfer effect of the electric heating tube 2, the thickness of the high heat conduction layer 3 also has influence on the external heat transfer of the electric heating tube 2, the thickness of the high heat conduction layer 3 is related to the arrangement form of the high heat conduction layer 3 (the high heat conduction layer 3 can be a metal heat conduction plate or a spraying layer, the production cost of the metal heat conduction plate is relatively low, and the spraying layer can increase the effective heat contact area between the high heat conduction layer 3 and other layers), specifically, when the high heat conduction layer 3 is a metal heat conduction plate, the thickness of the metal heat conduction plate is 0.5mm to 2; when the high heat conduction layer 3 is the spraying layer, the thickness of the spraying layer is 0.1mm to 0.5mm, so that the heat of the electric heating tube 2 can be better transmitted outwards, the influence of the arrangement of the low heat conduction coating 4 on the electric heating tube 2 is reduced, and the problem of cost waste caused by the excessively thick high heat conduction layer 3 is also avoided.
As described above, the main function of the high heat conduction layer 3 is to effectively transfer the heat of the electric heating tube 2 to the outside, so as to avoid the problem of dry burning of the electric heating tube 2 due to the direct contact between the low heat conduction coating 4 and the electric heating tube 2, and therefore, the high heat conduction layer 3 is disposed in relation to the area where the low heat conduction coating 4 is disposed, as will be described in detail below.
When the arrangement region of the low thermal conductive coating 4 covers the center of the bottom wall 11 of the liner 1, for example, please refer to fig. 4 and 5, the low thermal conductive coating 4 covers the outer surface of the bottom wall 11 of the entire liner 1, and the corresponding high thermal conductive layer 3 only needs to cover the electric heating tube 2 and the surrounding peripheral region thereof, so as to prevent the low thermal conductive coating 4 from directly contacting the electric heating tube 2, however, in the first embodiment, the arrangement region of the high thermal conductive layer 3 covers not only the electric heating tube 2 and the surrounding peripheral region thereof, but also the center of the lower surface of the low thermal conductive coating 4, so as to enable the heat of the electric heating tube 2 to be transmitted along the plane of the high thermal conductive layer 3 through the high thermal conductive layer 3, further reduce the power density of the contact region, improve the noise reduction effect, and the processing technology is relatively simple, for example, after the outer surface of the bottom wall 11 of the liner, and then spray the high heat conduction layer 3 on the external surface of the low heat conduction coating 4, polish the external surface of the high heat conduction layer 3 and weld with the electrothermal tube 2 finally, if it is cold spray to form the high heat conduction layer 3, can not need to polish the external surface of the high heat conduction layer 3.
The low heat conduction coating 4 is used for slowing down the speed of heat transfer along the thickness direction of the bottom wall 11 of the liner 1, the arrangement area of the low heat conduction coating 4 at least covers the contact area, so the low heat conduction coating 4 can be arranged in an annular area, when the arrangement area of the low heat conduction coating 4 is annular, please refer to fig. 6 and fig. 7, in the second embodiment, the low heat conduction coating 4 is annular, the high heat conduction layer 3 is attached to the outer surface of the low heat conduction coating 4, the middle part of the high heat conduction layer 3 is provided with a boss 31 which is embedded into a middle through hole of the low heat conduction coating 4 and is directly in thermal contact with the outer surface of the bottom wall 11 of the liner 1, the heat transfer along the plane of the bottom wall 11 of the liner 1 can be increased through the arrangement of the boss 31, the heating area of the bottom of the liner 1 is increased, and the noise.
Referring to fig. 6 and 7, in the second embodiment, the high heat conduction layer 3 and the bosses 31 are integrally formed, and the high heat conduction layer 3 and the bosses 31 are made of the same material and in the same manner, for example, after the outer surface of the bottom wall 11 of the liner 1 is polished, the annular low heat conduction coating 4 is sprayed on the outer surface of the whole bottom wall 11, the high heat conduction layer 3 and the bosses 31 are sprayed on the outer surface of the low heat conduction coating 4, and finally the outer surface of the high heat conduction layer 3 is polished and welded with the electric heating tubes 2, if the high heat conduction layer 3 is formed by cold spraying, the outer surface of the high heat conduction layer 3 does not need to be polished, so the processing technology is simple.
The arrangement of the bosses 31 for achieving the above effects may also be to use a material and/or a manner different from that of the high heat conduction layer 3 to manufacture the bosses 31, for example, please refer to fig. 8 and 9, in a third embodiment, the high heat conduction layer 3 is an aluminum plate, the bosses 31 are sprayed layers, and to manufacture the liner assembly 100, the outer surface of the bottom wall 11 of the liner 1 is first polished, the annular low heat conduction coating 4 is sprayed on the outer surface of the whole bottom wall 11, then the bosses 31 are sprayed on the annular central area of the low heat conduction coating 4, then the aluminum plate is welded on the outer surface of the low heat conduction coating 4, and finally the electric heating tube 2 is welded on the aluminum plate.
In order to verify the effect of the annularly arranged low thermal conductivity coating 4 on the noise, the design gives another experiment:
experiment three
The experimental conditions are as follows: the same as in the first experiment.
The experimental steps are as follows: the same as in the first experiment.
And selecting an electric kettle with the structure shown in fig. 7, selecting a low-heat-conduction coating 4 (the outer diameter is 120mm, the material is Fe, the thickness is 0.5mm, and the porosity is 15%) and a high-heat-conduction coating 3 (the material is Al, the coating with the thickness of 0.5mm, the heat conductivity coefficient is 237, the outer diameter is 110mm, a boss which is embedded into the low-heat-conduction coating and is in thermal contact with the outer surface of the liner is arranged in the middle of the high-heat-conduction coating 3), measuring the experimental data corresponding to the low-heat-conduction coating 4 when the inner diameter sizes are different, and specifically respectively showing in table.
TABLE 4
| Inner diameter mm of low heat-conducting coating | Maximum acoustic power/dB | Average acoustic power/dB | Thermal efficiency value |
| 75 | 49.39 | 48.02 | 88.8％ |
| 60 | 50.05 | 48.91 | 88.6％ |
| 45 | 50.64 | 49.81 | 88.4％ |
| 30 | 52.79 | 51.84 | 88.3％ |
| 15 | 53.63 | 52.71 | 88.2％ |
| 0 | 54.98 | 53.97 | 88.0％ |
Comparing the data in table 1 and table 4, no matter low heat conduction coating 4 is the annular setting or covers 1 diapire 11 of whole inner bag, and average acoustic power has reduced 11dB at least, and the biggest acoustic power has reduced 15dB at least to, the difference of thermal efficiency value and current product all is within 1 percentage point, satisfies the operation requirement, accords with the ann rule regulation.
As can be seen from the data in table 4, when the inner diameter of the low thermal conductive coating 4 is from 0 to 75mm, the average acoustic power and the maximum acoustic power are decreased, and the thermal efficiency value is increased, which also means that the heat of the electric heating tube 2 can be effectively transferred to the outside, thereby reducing the damage to the electric heating tube 2.
High heat-conducting layer 3 except above-mentioned mode of setting up, high heat-conducting layer 3 can also cover whole low heat-conducting coating 4, and extend to the surface of at least 1 lateral wall 12 bottom of inner bag, sets up high heat-conducting layer 3 through the surface at 1 lateral wall 12 of inner bag, further increases the heating area of 1 bottom of inner bag, makes being heated of 1 bottom of inner bag more even, has reduced the produced noise of liquid heater 200 during operation to, liquid heater 200's heating efficiency has been promoted.
The above description is only a preferred embodiment of the present invention, and 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 (10)
1. A bladder assembly for a liquid heater, the bladder assembly comprising:
an inner container;
the low heat conduction coating is attached to the outer surface of the bottom wall of the inner container, and the porosity of the low heat conduction coating is 10-40%;
the high heat conduction layer covers the low heat conduction coating, and the heat conduction coefficient of the high heat conduction layer is greater than or equal to 100W/m.k; and the number of the first and second groups,
the electric heating tube is arranged on the outer surface of the high heat conduction layer;
the low heat conduction coating is annular, and the middle part of the high heat conduction layer is provided with a boss which is embedded into a middle through hole of the low heat conduction coating and is directly in thermal contact with the outer surface of the bottom wall of the inner container.
2. The liner assembly of claim 1, wherein the low thermal conductive coating has a porosity of 15% to 35%.
3. The liner assembly of claim 2, wherein the low thermal conductive coating has a porosity of 16% to 18%.
4. The liner assembly of claim 1, wherein the low thermal conductivity coating has a thickness of 0.1mm to 1.5 mm.
5. The liner assembly of claim 1, wherein the material of the low thermal conductivity coating is Al, Fe, 304 stainless steel, or 430 stainless steel.
6. The liner assembly of any one of claims 1-5, wherein the high thermal conductive layer is a metal thermal conductive plate.
7. The liner assembly of claim 1, wherein the high thermal conductive layer has a thickness of 0.5mm to 2 mm.
8. The liner assembly of claim 1, wherein said low thermal conductivity coating covers the entire outer surface of said bottom wall of said liner, and said high thermal conductivity layer covers at least said electrical heating element and its surrounding peripheral area.
9. The liner assembly of claim 1, wherein the high thermal conductive layer covers the entire low thermal conductive coating and extends to at least an outer surface of the bottom of the sidewall of the liner.
10. A liquid heater including a bladder assembly as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711041137.1A CN109724254B (en) | 2017-10-27 | 2017-10-27 | Inner container assembly and liquid heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711041137.1A CN109724254B (en) | 2017-10-27 | 2017-10-27 | Inner container assembly and liquid heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109724254A CN109724254A (en) | 2019-05-07 |
| CN109724254B true CN109724254B (en) | 2021-06-25 |
Family
ID=66293976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711041137.1A Active CN109724254B (en) | 2017-10-27 | 2017-10-27 | Inner container assembly and liquid heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109724254B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200414738Y1 (en) * | 2006-02-02 | 2006-04-24 | 이병순 | Device of Heating for a Water-Heater |
| CN201139431Y (en) * | 2007-12-08 | 2008-10-29 | 方士达 | Electric heating container |
| CN203789706U (en) * | 2014-04-09 | 2014-08-27 | 佛山市顺德区美的电热电器制造有限公司 | Container body of vacuum electric-heating container and electric kettle |
| CN206365070U (en) * | 2016-12-30 | 2017-07-28 | 佛山市顺德区美的电热电器制造有限公司 | Insulating pot |
-
2017
- 2017-10-27 CN CN201711041137.1A patent/CN109724254B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200414738Y1 (en) * | 2006-02-02 | 2006-04-24 | 이병순 | Device of Heating for a Water-Heater |
| CN201139431Y (en) * | 2007-12-08 | 2008-10-29 | 方士达 | Electric heating container |
| CN203789706U (en) * | 2014-04-09 | 2014-08-27 | 佛山市顺德区美的电热电器制造有限公司 | Container body of vacuum electric-heating container and electric kettle |
| CN206365070U (en) * | 2016-12-30 | 2017-07-28 | 佛山市顺德区美的电热电器制造有限公司 | Insulating pot |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109724254A (en) | 2019-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206006885U (en) | Pot and pan | |
| CN109724254B (en) | Inner container assembly and liquid heater | |
| CN109717735B (en) | Inner container assembly and liquid heater | |
| CN108324099B (en) | Electric kettle | |
| CN210727519U (en) | Heating chassis of electric kettle | |
| CN207555996U (en) | Liner component and liquid heater | |
| CN208435286U (en) | Liner component and liquid heater | |
| CN207912537U (en) | A kind of new type electric heating pot | |
| CN108618606B (en) | electric kettle | |
| CN215127257U (en) | Glassware and heating device | |
| CN209846881U (en) | Container and cooking utensil | |
| CN218791834U (en) | Lid and cooking utensil | |
| CN108652439B (en) | Electric kettle | |
| CN108784336B (en) | Electric kettle | |
| CN109805748B (en) | Liner assembly and liquid heater | |
| CN213909749U (en) | Liquid heater | |
| JP3110038U (en) | Clay pot for cooking rice | |
| CN211673752U (en) | Cooking device and upper cover thereof | |
| CN208371541U (en) | Liner component and liquid heater | |
| CN217285407U (en) | Three-dimensional heat generation electric heating inner container | |
| CN205251276U (en) | Instant heating type high temperature resistant dish that generates heat | |
| CN109724253A (en) | Liner component and liquid heater | |
| CN209518742U (en) | A kind of container for liquid heating | |
| CN217565720U (en) | Chassis assembly and liquid heating vessel | |
| CN213155348U (en) | Electric heating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |