CN108652439B - Electric kettle - Google Patents
Electric kettle Download PDFInfo
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- CN108652439B CN108652439B CN201710207873.3A CN201710207873A CN108652439B CN 108652439 B CN108652439 B CN 108652439B CN 201710207873 A CN201710207873 A CN 201710207873A CN 108652439 B CN108652439 B CN 108652439B
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- kettle
- bottom wall
- heating film
- electric
- kettle bottom
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21008—Water-boiling vessels, e.g. kettles electrically heated
- A47J27/21016—Water-boiling vessels, e.g. kettles electrically heated with heating elements immersed in the water
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
- A47J27/21—Water-boiling vessels, e.g. kettles
- A47J27/21166—Constructional details or accessories
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
- A47J36/24—Warming devices
- A47J36/2483—Warming devices with electrical heating means
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
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Abstract
The invention discloses an electric kettle, which comprises a kettle bottom wall (1) and a heating film (4), wherein the heating film is arranged on the bottom surface of the kettle bottom wall, the ratio of the area of the heating film to the area of the kettle bottom wall is not less than 3/5, and the power density of the heating film to the kettle bottom wall is not more than 30W/cm2And the electric kettle also comprises a low thermal conductivity material plate (10) with the thermal conductivity not more than 60W/m.k, and the low thermal conductivity material plate is arranged between the kettle bottom wall and the heating film. In the electric kettle, the heating film is arranged on the bottom surface of the kettle bottom wall, so that the heat contact area between the heating element arranged on the bottom surface of the kettle bottom wall and the kettle bottom wall is increased, the superheat degree of the kettle bottom wall is favorably reduced, the frequency of the steam bubbles separated from the kettle bottom wall is reduced, the frequency of the steam bubbles breaking in water is reduced, and the remarkable noise reduction effect is achieved.
Description
Technical Field
The invention belongs to the field of household appliances, and particularly relates to an electric kettle.
Background
The kettle diapire of conventional insulating pot adopts horizontal kettle diapire more, and the electric plate is installed in the bottom surface of horizontal kettle diapire, directly heats horizontal kettle diapire, and then heats the liquid in the insulating pot. Wherein, the heat source of the electric heating plate comes from the electric heating pipe, and the electric heating pipe is used for carrying out centralized heating on the bottom wall of the horizontal kettle so as to heat the liquid in the kettle.
When the electric kettle works, the electric heating tube conducts heat to the bottom wall of the kettle in a contact heat conduction mode, the contact area is small, the superheat degree of a heat contact area of the bottom wall of the kettle and the electric heating tube is large, so that bubbles generated in the heat contact area are small, the separation frequency is high, the small bubbles separated from the bottom wall of the kettle can transfer the heat of the small bubbles to peripheral liquid in the rising process, the small bubbles are easy to break due to heat loss, and large noise is generated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the electric kettle which can effectively reduce the frequency of bubbles breaking away from the bottom wall of the kettle, thereby reducing the frequency of bubbles breaking in water and achieving the effect of noise reduction.
In order to achieve the above object, the present invention provides an electric kettle, which comprises a kettle bottom wall and a heating film, wherein the heating film is arranged on the bottom surface of the kettle bottom wall, the ratio of the area of the heating film to the area of the kettle bottom wall is not less than 3/5, and the power density of the heating film to the kettle bottom wall is not more than 30W/cm2The electric kettle also comprises a low-thermal-conductivity-coefficient material plate with the thermal conductivity of not more than 60W/m.k, the low-thermal-conductivity-coefficient material plate is positioned between the kettle bottom wall and the heating film, and the vertical projection area of the heating film facing the kettle bottom wall is positioned in the vertical projection area of the low-thermal-conductivity-coefficient material plate facing the kettle bottom wall.
Preferably, the ratio of the area of the heating film to the area of the kettle bottom wall is not less than 7/10 and not more than 9/10, and the power density of the heating film to the kettle bottom wall is not more than 25W/cm2。
Preferably, the heating film is concentrically arranged on the bottom surface of the kettle bottom wall, or the heating film is arranged symmetrically relative to the center of the bottom surface of the kettle bottom wall.
Preferably, the kettle bottom wall is a circular bottom wall, and the heating film is arranged on the bottom surface of the kettle bottom wall in a disc shape, a square frame shape or an annular shape.
Preferably, a linear, circular or square cut-out is further formed in the disc-shaped, square-frame-shaped or circular heating film.
Preferably, the heating film is an electrothermal film or a thick film, the electrothermal film or the thick film is covered with an insulating layer, and preferably, the insulating layer is a ceramic layer or a glass ceramic layer.
Preferably, the radial width of the outer periphery of the sheet of low thermal conductivity material beyond the outer periphery of the heated film is no more than 10 mm.
Preferably, the thickness of the low thermal conductivity material plate is not less than 0.5mm and not more than 5mm, preferably not less than 0.5mm and not more than 1 mm.
Preferably, the low thermal conductivity material plate is a 45# steel plate, a 304 stainless steel plate, a 430 stainless steel plate, or a high manganese steel plate.
Through the technical scheme, in the electric kettle, the heating film is arranged on the bottom surface of the kettle bottom wall, and the ratio of the area of the heating film to the area of the kettle bottom wall is not less than 3/5 and not more than 1, so that the heat contact area between the heating element arranged on the bottom surface of the kettle bottom wall and the kettle bottom wall is increased, the superheat degree of the kettle bottom wall is favorably reduced, the frequency of the steam bubbles separating from the kettle bottom wall is reduced, the frequency of the steam bubbles breaking in water is reduced, and a remarkable noise reduction effect is achieved.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a front view of an electric kettle of the present invention;
FIG. 2 is an overall cross-sectional view of an electric kettle of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a bottom view of the prior art electrical heating tube installed on the bottom of the kettle bottom wall;
FIG. 5 shows the heating area of the electrothermal tube on the bottom wall of the kettle and the heating area after the improvement of the present invention;
FIG. 6 is a schematic view showing the bubbles on the top surface of the bottom wall of the kettle when the electrothermal tube is mounted on the bottom wall of the kettle in the prior art;
FIG. 7 is a schematic view of the top surface vapor bubble of the kettle bottom wall with the heating membrane mounted on the kettle bottom wall in the present invention;
FIG. 8 is a bottom view of the heating membrane according to the first preferred embodiment of the present invention disposed on the bottom wall of the kettle;
FIG. 9 is a bottom view of the heating membrane according to the second preferred embodiment of the present invention disposed on the bottom wall of the kettle;
FIG. 10 is a bottom view of a heating membrane according to a third preferred embodiment of the present invention, disposed on the bottom wall of a kettle;
FIGS. 11A to 11F are bottom views of the heating film having different linear slits according to the present invention disposed on the bottom wall of the pot;
FIGS. 12A-12C are bottom views of the heating membrane of the present invention with different ring-shaped notches formed in the bottom wall of the kettle;
FIGS. 13A to 13C are bottom views of the heating film having different zigzag slits according to the present invention installed on the bottom wall of the pot;
FIG. 14 is a cross-sectional view of the kettle bottom wall with a low thermal conductivity material plate of the present invention;
fig. 15 is an enlarged view of a portion B in fig. 14.
Description of reference numerals:
1 kettle bottom wall 6 handles
2 kettle body 7 steam pipe
3 pot lid 8 electric heating tube
4 heating film 9 insulating layer
5 casing 10 low heat conductivity coefficient material plate
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like are generally described with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 3, the invention provides an electric kettle, which comprises a kettle bottom wall 1, a kettle body 2 and a kettle cover 3, wherein the kettle bottom wall 1 forms a kettle body, a heating film 4 for heating liquid in the kettle is installed at the bottom of the kettle bottom wall 1, a shell 5 is arranged around the outer side of the kettle body, a handle 6 is connected onto the shell 5, a steam pipe 7 is arranged in the kettle body and the handle 6 or between the kettle body and the shell 5, a temperature controller is arranged at the bottom of the kettle body, the steam pipe 7 guides steam in the kettle body to the temperature controller, when the temperature controller detects that the temperature of the steam reaches a preset value, a power supply of the heating film 4 is disconnected through deformation of a bimetallic strip, or a temperature sensor is arranged on the kettle body, and when the temperature sensor detects that the temperature in the kettle reaches the preset value, the power supply of the heating film 4 is disconnected through a micro-processing chip.
In the electric kettle in the prior art, referring to fig. 4, an electric heating tube 8 for heating liquid in the kettle is arranged on the bottom surface of the kettle bottom wall 1, and in the whole heating process of the electric kettle, the electric heating tube 8 conducts the heat of the electric heating tube 8 to the bottom surface of the kettle bottom wall 1 in a contact heat conduction manner, and the heat contact area is annular and has a small area, i.e. the current heating area shown in the left part of fig. 5 makes the heat flow density of the heat contact area between the kettle bottom wall 1 and the electric heating tube 8 large, so that the superheat degree of the heat contact area is also large. Specifically, the larger the superheat degree of the thermal contact area between the kettle bottom wall 1 and the electric heating tube 8 is, the larger the evaporation power generated by the gas generated after the liquid is gasified to supplement into the vapor bubble is, the larger the vertical upward lifting force given to the vapor bubble by the gas is, and further the small vapor bubble is separated from the kettle bottom wall 1 when growing up unevenly, so that when the liquid in the kettle is heated by the electric heating tube 8 arranged on the bottom surface of the kettle bottom wall 1, the vapor bubble generated on the kettle bottom wall 1 is difficult to grow and the frequency of separating from the kettle bottom wall 1 is higher, so that the vapor bubble separated from the kettle bottom wall 1 into the water is small and dense, see fig. 6, and the small vapor bubble is also easy to break in the water due to heat loss in the rising process, and generates larger noise.
In view of the above, in order to reduce the superheat degree of the top surface of the bottom wall 1 of the kettle, thereby reducing the frequency of bubbles escaping from the bottom wall 1 of the kettle, and achieving the noise reduction effect, referring to fig. 2 and 8, in the electric kettle of the present invention, the heating film 4 is disposed on the bottom surface of the bottom wall 1 of the kettle, and the ratio of the area of the heating film 4 to the area of the bottom wall 1 of the kettle is not less than 3/5, and the power density of the heating film 4 to the bottom wall 1 of the kettle is not more than 30W/cm2. The arrangement increases the heat contact area between the heating element arranged on the bottom surface of the kettle bottom wall 1 and the kettle bottom wall 1, namely, the improved rear heating area shown in the right part of fig. 5 of the invention reduces the power density of the heating element arranged on the bottom surface of the kettle bottom wall 1 to the kettle bottom wall 1, is beneficial to reducing the superheat degree of the top surface of the kettle bottom wall 1, so that the evaporation power generated by gas generated by liquid gasification entering steam bubbles is reduced, correspondingly, the vertical upward lifting force given to the steam bubbles by the gas is reduced, and further the steam bubbles can grow into larger steam bubbles on the kettle bottom wall 1 and then are separated from the kettle bottom wall 1, as shown in fig. 7, thus the frequency of the steam bubbles separating from the kettle bottom wall 1 can be effectively reduced, the frequency of the steam bubbles breaking in water is reduced, the noise value of the electric kettle during operation is reduced, and the remarkable noise reduction effect is achieved.
Further, the ratio of the area of the heating film to the area of the kettle bottom wall 1 is not less than 7/10 and not more than 9/10, and the power density of the heating film 4 to the kettle bottom wall 1 is not more than 25W/cm2. It can be understood that the power density of the heating film 4 to the kettle bottom wall 1 is inversely proportional to the coverage area of the heating film 4 on the bottom surface of the kettle bottom wall 1, i.e. the larger the area of the heating film 4 disposed on the bottom surface of the kettle bottom wall 1, the smaller the power density of the heating film 4 to the kettle bottom wall 1, and the smaller the superheat degree of the top surface of the kettle bottom wall 1, which is more beneficial for noise reduction.
Wherein, in order to heat the liquid in the kettle more uniformly through the kettle bottom wall 1, the heating film 4 should be concentrically arranged on the bottom surface of the kettle bottom wall 1, or the heating film 4 should be arranged symmetrically with respect to the center of the bottom surface of the kettle bottom wall 1. Specifically, the heating film provided on the bottom surface of the circular pot bottom wall 1 may be in various suitable shapes, for example, a disc shape, a square frame shape, or a ring shape (see fig. 8 to 10). Of course, the heating film attached to the bottom surface of the kettle bottom wall 1 may also be designed to have a notch shape, for example, a linear notch (see fig. 11A to 11F), an annular notch (see fig. 12A to 12C) or a circular notch (see fig. 13A to 13C) is further formed in the disc-shaped, square-shaped or annular electric heating film, which is not described in detail herein.
Specifically, the heating film 4 disposed below the kettle bottom wall 1 may be an electric heating film (i.e., an infrared heating film 4) or a thick film attached to the bottom surface of the kettle bottom wall 1, a coil panel or a PTC heating sheet disposed below the kettle bottom wall 1, or other heating elements having a large thermal contact area with the kettle bottom wall 1. In order to prevent the charged electrothermal film or thick film from contacting other components in the kettle and lead the electricity in the electrothermal film or thick film to the outer shell 5 of the electric kettle, and to cause the danger of electric shock or electric shock to the user, referring to fig. 2 and 3, an insulating layer 9 is covered outside the electrothermal film or thick film. Similarly, the PTC heating sheet is covered with an insulating layer 9. The insulating material covering the electric heating film, the thick film or the PTC heating plate can be selected from high-temperature resistant and insulating materials such as ceramics, glass ceramics and the like.
In addition, in order to make the kettle bottom wall 1 heated more uniformly and further reduce the superheat degree of the top surface of the kettle bottom wall 1, referring to fig. 14 and fig. 15, a low thermal conductivity material plate 10 with a thermal conductivity not greater than 60W/m.k is further arranged between the kettle bottom wall 1 and the heating film 4, so that the heat of the heating film is firstly conducted upwards to the kettle bottom wall 1 through the low thermal conductivity material plate 10 and then upwards to the liquid in the kettle through the kettle bottom wall 1, the increase of the thickness of the thermal contact area slows down the heat conduction along the thickness direction of the kettle bottom wall 1, and meanwhile, the transverse heating area of the kettle bottom wall 1 is increased, which is beneficial to the transverse heating uniformity of the kettle bottom wall 1, thereby reducing the superheat degree of the top surface of the kettle bottom wall 1 and being beneficial to noise reduction. Of course, the low thermal conductivity material plate 10 may be made of any suitable material, such as 45# steel plate, 304 stainless steel plate, 430 stainless steel plate or high manganese steel plate, and the thermal conductivity thereof should be not more than 60W/m.k.
Wherein the vertical projection area of the heating film 4 towards the kettle bottom wall 1 is located in the vertical projection area of the low thermal conductivity material plate 10 towards the kettle bottom wall 1, i.e. the outer periphery of the low thermal conductivity material plate 10 should be aligned with or exceed the outer periphery of the heating film 4. Further, the radial width of the outer periphery of the low thermal conductivity material sheet 10 beyond the outer periphery of the heating film 4 is not more than 10 mm. Specifically, the smaller the radial width of the outer periphery of the low thermal conductivity material plate 10 exceeding the outer periphery of the heating film 4 is, the larger the area of the heating film 4 disposed on the kettle bottom wall 1 is, and the smaller the superheat degree of the top surface of the kettle bottom wall 1 is, which is more favorable for noise reduction.
Specifically, the thickness of the low thermal conductivity material plate 10 should be not less than 0.5mm and not more than 5 mm. Further, the thickness of the low thermal conductivity material plate 10 should be not less than 0.5mm and not more than 1mm, but is not limited thereto. It will be appreciated that the thicker the plate 10 of low thermal conductivity material, the lower the heat flux density of the bottom wall 1 of the kettle, and correspondingly the lower the superheat of the top surface of the bottom wall 1 of the kettle, which is more advantageous for noise reduction, but also increases the production cost.
The invention is specifically illustrated below in three preferred embodiments.
In the first preferred embodiment as shown in fig. 8, a disc-shaped electric heating film is arranged on the bottom surface of the kettle bottom wall 1 of the electric kettle, the ratio of the area of the electric heating film to the area of the kettle bottom wall 1 is 4/5, and a ceramic layer (i.e. an insulating layer 9) is covered outside the electric heating film. Certainly, a low-thermal-conductivity-coefficient material plate 10 (such as a high manganese steel plate) can be arranged between the kettle bottom wall 1 and the electric heating film so as to slow down the heat conduction along the thickness direction of the kettle bottom wall 1 and reduce the superheat degree of the top surface of the kettle bottom wall 1.
In a second preferred embodiment as shown in fig. 9, a square frame-shaped electric heating film is arranged on the bottom surface of the kettle bottom wall 1 of the electric kettle, the ratio of the area of the electric heating film to the area of the kettle bottom wall 1 is 3/5, and a microcrystalline glass layer (i.e. an insulating layer 9) is covered outside the electric heating film. Certainly, a low-thermal-conductivity-coefficient material plate 10 (such as a high manganese steel plate) can be arranged between the kettle bottom wall 1 and the electric heating film so as to slow down the heat conduction along the thickness direction of the kettle bottom wall 1 and reduce the superheat degree of the top surface of the kettle bottom wall 1.
In a third preferred embodiment as shown in fig. 10, a ring-shaped thick film is provided on the bottom surface of the bottom wall 1 of the electric kettle, the ratio of the area of the electric heating film to the area of the bottom wall 1 is 7/10, and a ceramic layer (i.e. an insulating layer 9) is covered on the electric heating film. Certainly, a low-thermal-conductivity-coefficient material plate 10 (such as a high manganese steel plate) can be arranged between the kettle bottom wall 1 and the electric heating film so as to slow down the heat conduction along the thickness direction of the kettle bottom wall 1 and reduce the superheat degree of the top surface of the kettle bottom wall 1.
In the process of heating liquid in the kettle, the electric heating film or the thick film with a large area is arranged on the bottom surface of the kettle bottom wall 1 (namely, the heating film 4 with the area ratio of the kettle bottom wall 1 being 3/5-1), so that the thermal contact area between the heating element arranged on the bottom surface of the kettle bottom wall 1 and the kettle bottom wall 1 is increased, the superheat degree of the kettle bottom wall 1 is favorably reduced, the frequency that bubbles are separated from the kettle bottom wall 1 is reduced, and a remarkable noise reduction effect is achieved.
Specific example 1: the electric kettle structure shown in fig. 8 is adopted, that is, a disc-shaped electric heating film is arranged on the bottom surface of the kettle bottom wall 1 of the electric kettle, and a ceramic layer (i.e. an insulating layer 9) is covered outside the electric heating film. Wherein, the heating power of the electric heating film is 1800W, and the water quantity in the kettle is 1.7L.
The testing steps are as follows:
1) the water quantity with the highest water level is put into the kettle;
2) the temperature sensor is arranged in the middle of the water level of the center of the kettle;
3) pressing a start key to start timing measurement;
4) stopping timing measurement when the temperature of water in the kettle rises to 80 ℃;
5) and eliminating the noise value with the sound power value less than or equal to 45dB, carrying out A weighting on the tested noise value, and taking the average sound power as a judgment value.
The power density data of the electric heating film to the kettle bottom wall 1 and the noise data of the electric kettle in working are shown in the following table 1 under the condition that the area ratio of different electric heating films to the kettle bottom wall 1 is obtained.
Table 1: power density and noise data sheet at different area ratios
Comparative example 1: with the electric kettle structure shown in fig. 4, the electric heating tube 8 is annularly wound and mounted on the bottom surface of the kettle bottom wall 1, and in addition, other experimental parameters are consistent with those of embodiment 1.
And (3) testing results: the maximum sound power value of the electric kettle in working is 68.1dB, the average sound power value is 64.8dB, and the power density of the electric heating tube 8 to the kettle bottom wall 1 is 91.7W/cm2。
Comparing example 1 with comparative example 1, it can be seen that, compared with the electric heating tube 8 disposed on the bottom surface of the kettle bottom wall 1, the electric heating film disposed on the bottom surface of the kettle bottom wall 1 and having an area ratio to the kettle bottom wall 1 not less than 3/5 has a power density of far less than 91.7W/cm for the kettle bottom wall 12And the maximum sound power values are also obviously less than 68.1dB, the average sound power values are also less than 64.8dB, and the noise reduction effect is obvious. Wherein, when the ratio of the area of the electric heating film to the area of the kettle bottom wall 1 is 3/5, the power density of the electric heating film to the kettle bottom wall 1 is less than 30W/cm2When the electric kettle works, the noise value emitted by the electric kettle is in a range which can be received by a user better (namely, the average sound power value is less than 60dB, and the maximum sound power value is less than 62 dB). In addition, the larger the area ratio of the electric heating film to the area of the kettle bottom wall 1 is, the smaller the power density of the corresponding electric heating film to the kettle bottom wall 1 is, the lower the noise value sent by the electric kettle in the working process is, and the more favorable the noise reduction is; however, the larger the ratio of the area ratio is, the larger the area of the electric heating film is for the kettle bottom wall 1 with the same area, the higher the cost of the electric heating film required for producing the electric kettle is, therefore, for balancing the influence of the ratio of the area of the electric heating film to the area of the kettle bottom wall 1 on the noise generated when the electric kettle works and the production cost of the electric kettle, the ratio of the area of the electric heating film to the area of the kettle bottom wall 1 is preferably not less than 7/10 and not more than 9/10.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (8)
1. An electric kettle, characterized in that the electric kettle comprises a kettle bottom wall (1) and a heating film (4), the heating film (4) is arranged on the bottom surface of the kettle bottom wall (1), the ratio of the area of the heating film (4) to the area of the kettle bottom wall (1) is not less than 7/10 and not more than 9/10, the power density of the heating film (4) to the kettle bottom wall (1) is not more than 30W/cm2The electric kettle further comprises a low-thermal-conductivity material plate (10) with a thermal conductivity of not more than 60W/m.k, the low-thermal-conductivity material plate (10) is positioned between the kettle bottom wall (1) and the heating film (4), and the vertical projection area of the heating film (4) facing the kettle bottom wall (1) is positioned in the vertical projection area of the low-thermal-conductivity material plate (10) facing the kettle bottom wall (1).
2. An electric kettle as claimed in claim 1, characterized in that the power density of the heating film (4) to the kettle bottom wall (1) is not more than 25W/cm2。
3. An electric kettle as claimed in claim 1, characterized in that the heating membrane (4) is arranged concentrically to the bottom surface of the kettle bottom wall (1), or in that the heating membrane (4) is arranged centrally symmetrically with respect to the bottom surface of the kettle bottom wall (1).
4. An electric kettle as claimed in claim 3, characterized in that the kettle bottom wall (1) is a circular bottom wall, and the heating membrane (4) is arranged in a disc shape, a square frame shape or a ring shape on the bottom surface of the kettle bottom wall (1).
5. An electric kettle as claimed in claim 4, characterized in that a linear, circular or square cut-out is also formed in the disc-shaped, frame-shaped or ring-shaped heating membrane (4).
6. An electric kettle as claimed in claim 1, characterized in that said heating film (4) is an electric heating film or a thick film covered with an insulating layer (9).
7. An electric kettle as claimed in claim 1, characterized in that the thickness of the plate (10) of low thermal conductivity material is not less than 0.5mm and not more than 5 mm.
8. An electric kettle as claimed in claim 1, characterized in that said plates of low thermal conductivity material (10) are 45# steel plates, 304 stainless steel plates, 430 stainless steel plates or high manganese steel plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207873.3A CN108652439B (en) | 2017-03-31 | 2017-03-31 | Electric kettle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710207873.3A CN108652439B (en) | 2017-03-31 | 2017-03-31 | Electric kettle |
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| Publication Number | Publication Date |
|---|---|
| CN108652439A CN108652439A (en) | 2018-10-16 |
| CN108652439B true CN108652439B (en) | 2021-10-15 |
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| CN201710207873.3A Active CN108652439B (en) | 2017-03-31 | 2017-03-31 | Electric kettle |
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| CN113163969B (en) * | 2018-10-23 | 2023-02-21 | 布瑞威利私人有限公司 | Water jug |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100500A (en) * | 1986-02-06 | 1987-09-30 | 北京市太阳能研究所 | A kind of coating type electric heating element and technology |
| CN2054246U (en) * | 1989-08-03 | 1990-03-07 | 北京市太阳能研究所 | Glass cooking pot with electrothermal film |
| CN1069384A (en) * | 1991-08-03 | 1993-02-24 | 尹维平 | A kind of novel thick film electric heating body and preparation method |
| CN2140192Y (en) * | 1992-07-07 | 1993-08-18 | 姜占才 | Multifunctional electrothermal membrane electric rice cooker |
| CN2190938Y (en) * | 1994-04-14 | 1995-03-08 | 丁朝炎 | Electric film direct-heating non-base kettle |
| WO2000007410A2 (en) * | 1998-07-30 | 2000-02-10 | Otter Controls Limited | Improvements relating to electrically heated water boiling vessels |
| CN1320354A (en) * | 1999-08-13 | 2001-10-31 | 施特里克斯有限公司 | Thick film heater |
| CN204427677U (en) * | 2015-02-11 | 2015-07-01 | 佛山市顺德区美的电热电器制造有限公司 | Electrical heated appliance |
| CN204813364U (en) * | 2015-07-08 | 2015-12-02 | 浙江苏泊尔家电制造有限公司 | Rice cooker |
| CN205425063U (en) * | 2016-03-28 | 2016-08-03 | 佛山市顺德区美的电热电器制造有限公司 | Cooking utensil and heating plate |
| CN106473595A (en) * | 2015-08-28 | 2017-03-08 | 广东美的生活电器制造有限公司 | Insulating pot |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2185867Y (en) * | 1993-12-17 | 1994-12-21 | 北京市亚捷科技开发公司 | Electrothermal constant temp. water-storage heater |
| DE19939174A1 (en) * | 1999-08-20 | 2001-04-05 | Wet Automotive Systems Ag | Heating element for integration into the seating surface or backrest surface of an automotive vehicle, includes electrically nonconductive support layer and conductive layer |
| GB2466219A (en) * | 2008-12-12 | 2010-06-16 | Otter Controls Ltd | Thick film heating element |
| CN201798538U (en) * | 2010-09-30 | 2011-04-20 | 九阳股份有限公司 | Fast-heating electric kettle |
| CN105142247A (en) * | 2015-08-19 | 2015-12-09 | 成都隆芯科技有限公司 | Heating device capable of simultaneously heating from bottom part and lateral parts and heating method |
| CN105050212A (en) * | 2015-08-19 | 2015-11-11 | 成都隆芯科技有限公司 | Heating apparatus for heating bottom and top simultaneously and heating method thereof |
-
2017
- 2017-03-31 CN CN201710207873.3A patent/CN108652439B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86100500A (en) * | 1986-02-06 | 1987-09-30 | 北京市太阳能研究所 | A kind of coating type electric heating element and technology |
| CN2054246U (en) * | 1989-08-03 | 1990-03-07 | 北京市太阳能研究所 | Glass cooking pot with electrothermal film |
| CN1069384A (en) * | 1991-08-03 | 1993-02-24 | 尹维平 | A kind of novel thick film electric heating body and preparation method |
| CN2140192Y (en) * | 1992-07-07 | 1993-08-18 | 姜占才 | Multifunctional electrothermal membrane electric rice cooker |
| CN2190938Y (en) * | 1994-04-14 | 1995-03-08 | 丁朝炎 | Electric film direct-heating non-base kettle |
| WO2000007410A2 (en) * | 1998-07-30 | 2000-02-10 | Otter Controls Limited | Improvements relating to electrically heated water boiling vessels |
| CN1320354A (en) * | 1999-08-13 | 2001-10-31 | 施特里克斯有限公司 | Thick film heater |
| CN204427677U (en) * | 2015-02-11 | 2015-07-01 | 佛山市顺德区美的电热电器制造有限公司 | Electrical heated appliance |
| CN204813364U (en) * | 2015-07-08 | 2015-12-02 | 浙江苏泊尔家电制造有限公司 | Rice cooker |
| CN106473595A (en) * | 2015-08-28 | 2017-03-08 | 广东美的生活电器制造有限公司 | Insulating pot |
| CN205425063U (en) * | 2016-03-28 | 2016-08-03 | 佛山市顺德区美的电热电器制造有限公司 | Cooking utensil and heating plate |
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| CN108652439A (en) | 2018-10-16 |
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