CN111396937B - Electromagnetic cooking utensil - Google Patents
Electromagnetic cooking utensil Download PDFInfo
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- CN111396937B CN111396937B CN202010189074.XA CN202010189074A CN111396937B CN 111396937 B CN111396937 B CN 111396937B CN 202010189074 A CN202010189074 A CN 202010189074A CN 111396937 B CN111396937 B CN 111396937B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Electromagnetism (AREA)
- Cookers (AREA)
Abstract
The application discloses an electromagnetic cooking appliance, which comprises a base and a panel arranged on the base, wherein a heating unit is arranged in the base, the panel is used for bearing a cooker, the panel is provided with a heating area corresponding to the position of the heating unit, and a boss used for supporting the cooker is arranged on the outer surface of the heating area, so that a heat insulation gap exists between the cooker placed on the panel and the panel; the outer surface of the heating zone also has a heat-reflective layer for reflecting heat radiated to the panel. The existence in hot clearance in this application has avoided the pan to the direct heat conduction of panel, has reduced the calorific loss of pan, has reduced the inside temperature rise of cooking utensil by a wide margin, just the existence in heat-insulating clearance has further strengthened the heat reflection effect of heat reflection layer, and this application is carried out the separation from two layers of "conduction", "radiation" to thermal transmission simultaneously, has reduced the calorific loss of pan effectively, has improved heating efficiency.
Description
Technical Field
The application belongs to the technical field of kitchen utensil, especially, relate to an electromagnetic cooking utensil.
Background
Electromagnetic cooking utensils such as electromagnetism stove, electromagnetism kitchen are the electric cooking utensil that utilizes the electromagnetic induction heating principle to make, and it need not naked light or conduction formula heating and can let heat directly produce at the pan, and is safe, sanitary, and heats the efficiency utilization ratio and obtain very big improvement, therefore receives more and more consumers' favor.
Electromagnetic cooking utensil is far above the temperature of the inside components and parts of cooking utensil at the temperature of in-process pan, the pan directly puts on electromagnetic cooking utensil's panel among the prior art, the heat of electromagnetic cooking utensil operation in-process pan can directly transmit inside cooking utensil through the panel, the heat transfer of this type, the heat loss has been caused on the one hand, the heating efficiency utilization ratio to the pan has been reduced, it is long when having prolonged the culinary art, user experience has been reduced, on the other hand can lead to cooking utensil inside temperature rise seriously, it is serious to increase cooking utensil inside radiator fan's operation burden, reduce cooking utensil inside electronic components's life, influence cooking utensil's normal operating.
Except for above-mentioned heat-conducting mode, electromagnetic cooking utensil operation in-process, the pan still can be to panel and cooking utensil inside radiation heat, exists at present through the upper surface and the lower surface at the panel set up heat reflection layer to reach the mode that reflects the pan with the heating pan once more of the heat of radiation, reduce pan calorific loss, improvement efficiency. However, the pan is higher to the heat-conducting efficiency of panel through the bottom, and the proportion that heat radiation occupied is less under not too high temperature, and the mode that the pan directly arranged in on the panel among the prior art makes pan direct and panel contact, and the pan passes through the heat transfer mode that this leading heat transfer mode of heat-conduction gives the panel and passes through far more than the panel heat that the heat reflection layer transmitted the pan, consequently the heat energy efficiency utilization rate promotion effect that the technical scheme that sets up the heat reflection layer among the prior art can reach is very limited, and the actual measurement heat energy efficiency utilization rate improves only 0.1%. The pan can fish tail the heat reflection layer with panel long-term contact, and its coarse surface can influence the heat reflection effect after the heat reflection layer is impaired.
Moreover, in the prior art, the mode of the electromagnetic cooking appliance for improving the energy efficiency is generally an optimized wire coil design, but practice proves that the improvement of the heat energy efficiency utilization rate by the optimized mode is very limited, the optimization of the wire coil is particularly complex, the cost is high, and even if the optimized design is carried out at high cost, the improvement of the heat energy efficiency utilization rate is only within 1%.
It will thus be seen that the prior art is susceptible to further improvement and enhancement.
Disclosure of Invention
The present application provides an electromagnetic cooking appliance to solve at least one of the above technical problems.
The technical scheme adopted by the application is as follows:
an electromagnetic cooking appliance comprises a base and a panel arranged on the base, wherein a heating unit is arranged in the base, the panel is used for bearing a cooker, the panel is provided with a heating area corresponding to the heating unit, a boss used for supporting the cooker is arranged on the outer surface of the heating area, and a heat insulation gap is formed between the cooker arranged on the panel and the panel; the outer surface of the heating zone also has a heat-reflective layer for reflecting heat radiated to the panel.
The electromagnetic cooking appliance in the present application also has the following additional technical features:
the boss is closed cyclic annular, the top of boss has the sealing, make place in the pan bottom border of panel with sealed cooperation between the boss, the boss lower surface is laminated with the panel is sealed, with the panel with form the closed air chamber between the pan.
The thickness of the closed air chamber is 0.5-4 mm.
The outer surface of the heating area is provided with a plurality of bosses which are arranged at intervals.
The plurality of bosses form a non-closed annular structure, or the plurality of bosses are a plurality of protruding points which are annularly arranged.
The heat-reflecting layer is arranged on the surface of the panel, which is covered by the heat-reflecting layer, and is opposite to the bottom surface of the cookware.
The electromagnetic cooking appliance also comprises a movable temperature measuring element, the panel is provided with a through hole matched with the movable temperature measuring element, and the movable temperature measuring element is contacted with a cooker placed on the panel through the through hole; and/or, electromagnetic cooking utensil still including set up in infrared temperature element in the base, the panel have with the corresponding printing opacity district in infrared temperature element position, infrared temperature element passes through printing opacity district is gathered and is put in the temperature of the pan of panel.
The bottom surface of the pot is projected on the panel and is positioned in the heat reflecting layer.
And a pattern layer is also arranged in the heat reflecting layer.
The boss is made of an elastic material.
Due to the adoption of the technical scheme, the beneficial effects obtained by the application are as follows:
1. electromagnetic cooking utensil in this application has carried out anti-conventional design, and is obviously different for smooth surperficial with the upper surface of panel among the prior art, this application the panel with be provided with the boss between the pan, so that place in the pan of panel with there is thermal-insulated clearance between the panel, and the pan has been avoided to the direct heat conduction of panel to the existence in this thermal-insulated clearance, makes pan bottom heat pass through the rate greatly reduced that heat conduction transmitted for the panel, has reduced the calorific loss of pan, has reduced the inside temperature rise of cooking utensil by a wide margin, has protected the inside electronic components of cooking utensil effectively, has guaranteed the reliability and the stability of cooking utensil operation. Moreover, in this application the surface of panel zone of heating still has heat reflection layer, heat reflection layer can the reflection radiation arrive the heat of panel, and mostly remain bottom of a boiler bottom radiation to the heat of below, has promoted the "recovery" utilization ratio to the pan thermal radiation. Consequently, this application is simultaneously from "conduction", "the heat transmission is carried out the separation to two layers of face of radiation", has reduced the calorific loss of pan effectively, has improved heating efficiency utilization ratio, and has reduced the inside temperature rise of cooking utensil.
2. Compared with the technical scheme that the heat energy efficiency utilization rate is improved by optimizing the design of the wire coil or additionally arranging the heat insulation structure between the panel and the wire coil in the prior art, the technical scheme of additionally arranging the boss and the heat reflection layer is adopted in the application, the application is not only low in cost, but also the heat energy efficiency utilization rate improvement effect is very obvious.
3. As an preferred embodiment of this application, the boss is closed cyclic annularly, the sealed laminating of boss lower surface and panel, the top of boss has the sealing, and the bottom of pan and the top seal of boss when the pan is placed in the boss, thereby the panel with form the closed air chamber between the pan, this closed air chamber's existence has realized the isolation of the inside hot-air of closed air chamber and outside air, makes inside and outside air not have the convection heat exchange to avoid the heat loss that inside and outside air convection caused, this embodiment intervenes thermal transmission from "conduction", "radiation" and "reduce the three aspect of heat exchange", has reduced the heat loss, has promoted heat efficiency utilization ratio by a wide margin.
4. As a preferred embodiment of this application, the surface of the district of heating is provided with a plurality ofly the boss, it is a plurality of boss interval arrangement, further, among two adjacent bosses, the height that highly is less than the boss that is located the outside that is located inboard highly perhaps parallel and level each other to can match different pans, enlarge electromagnetic cooking utensil's application scope promotes user experience.
5. As an preferred embodiment of this application, a plurality of bosss enclose into non-closed cyclic annular structure, perhaps a plurality of bosss are a plurality of bumps that cyclic annular set up, the mode that multistage or multiple spot supported in this embodiment can realize the isolation of pan and panel equally, the direct contact of pan and panel has been avoided, thereby this leading factor of direct heat-conduction has been restricted, the heat loss of pan has been reduced, and the inside temperature rise of cooking utensil has been reduced, make the inside components and parts of cooking utensil keep at the lower temperature, the stability of cooking utensil operation has been improved, and the mode that multistage or multiple spot supported is compared in the closed cyclic annular structure of boss, can also save material, reduce cost.
6. As a preferred embodiment of this application, the boss with the heat reflection layer is the light color, and the boss and the heat reflection layer of light color can promote the reflectance to the infrared ray, promote the heat reflection effect to reduce the heat that the pan scatters and disappears to cooking utensil inside radiation.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of an electromagnetic cooking appliance according to an embodiment of the present application, in which the direction of arrows shows the flow of heat.
Fig. 2 is an enlarged view of a portion a of fig. 1, in which the direction of arrows shows the flow of heat.
Fig. 3 is a top view of the electromagnetic cooking apparatus according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an electromagnetic cooking appliance according to another embodiment of the present application.
Fig. 5 is a top view of the electromagnetic cooking apparatus according to an embodiment of the present application.
Fig. 6 is a top view of the electromagnetic cooking apparatus according to another embodiment of the present application.
Fig. 7 is a top view of the electromagnetic cooking apparatus according to another embodiment of the present application.
Fig. 8 is a top view of the electromagnetic cooking apparatus according to another embodiment of the present application.
FIG. 9 is a schematic view of the structure of the electromagnetic cooking apparatus having a movable temperature measuring element of the present application.
FIG. 10 is a schematic diagram of an electromagnetic cooking appliance having an infrared temperature measuring element according to the present application.
Fig. 11 is a top view of the electromagnetic cooking apparatus according to an embodiment of the present application.
Wherein,
1. 11, 12 pots; 2, a panel; 3. 31, 32 bosses; 4, heat reflecting layer; 5 a heating unit; 6 movable temperature measuring element; 7 infrared temperature measuring element; 8, a light-transmitting area; 9 sealing the air chamber; 10 pattern layers.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
In addition, in the description of the present application, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the positional or orientational relationship shown in the drawings for the purpose of convenience and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In this application, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature such that the first and second features are in direct contact, or the first and second features are in indirect contact via an intermediary. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the working process of the electromagnetic cooking appliance, the temperature of the cookware is far higher than the temperature of components inside the cooking appliance, in order to ensure the consistency of the appearance of the electromagnetic cooking appliance and enhance the aesthetic degree of the electromagnetic cooking appliance, the outer surface of the panel of the electromagnetic cooking appliance in the prior art is a flat surface, when the cookware is placed on the panel, the bottom of the cookware can be in direct contact with the panel, in the running process of the electromagnetic cooking appliance, part of heat generated by the cookware can be dissipated into the air from the upper part and the periphery to cause heat loss which is difficult to utilize, the other part of heat can be downward and is conducted and radiated into the cooking appliance through the panel, and the part of heat causes the heating of the whole panel and the temperature rise inside the cooking appliance; this portion of the available heat is dissipated due to the environment and the presence of the heat sink fan within the cooking appliance. In order to solve the problem, in the prior art, heat-reflecting layers are arranged on the inner surface and the outer surface of a panel to reflect heat transferred to the panel to a pot, but practice proves that compared with the technical scheme without the heat-reflecting layers, the technical scheme with the heat-reflecting layers added only improves the heat energy efficiency utilization rate of an electromagnetic cooking appliance by about 0.1%, namely the improvement effect of the heat energy efficiency utilization rate by the mode of simply adding the heat-reflecting layers is very limited, which can be called a water cup fuel.
As shown in fig. 1, 4, 8 and 9, an electromagnetic cooking appliance includes a base and a panel 2 disposed on the base, wherein a heating unit 5 is disposed in the base, the panel 2 is used for carrying a pot 1, and the panel 2 has a heating area corresponding to the position of the heating unit 5. Different from the prior art, the anti-conventional design is carried out, the boss 3 used for supporting the cookware 1 is arranged on the outer surface of the heating area, so that a heat insulation gap exists between the cookware 1 placed on the panel 2 and the panel 2; the outer surface of the heating zone also has a heat-reflective layer 4 for reflecting heat radiated to the panel 2. The arrangement of the boss 3 can ensure that a certain distance is kept between the cookware 1 placed on the panel 2 and the panel 2, thereby avoiding direct heat conduction between the cookware 1 and the panel 2.
As a comparative example of the present application, it is verified that when the outer surface of the panel 2 is only provided with the boss 3, and the color of the boss 3 is dark color, such as black, the heat energy efficiency utilization rate of the electromagnetic cooking appliance during the operation process can be improved by 0.5% to 0.7% in comparison with the common prior art that neither a heat-reflective layer nor a boss is provided on the panel. When the bosses 3 and the heat-transfer layer 4 are simultaneously provided on the outer surface of the panel 2, the effect of improving the thermal efficiency will be described in each embodiment below.
In this application, heat reflection layer 4 is in the face of the cover of 2 surfaces of panel is just right 1 bottom surface of pan. As a preferred embodiment of this application, the projection of pan 1 bottom surface at panel 2 is located heat reflection layer 4, promptly heat reflection layer 4's surface area is greater than or equal to the area of pan 1 bottom surface to make pan 1 bottom surface to the heat radiation of panel 2 is by heat reflection layer 4 reflects as far as possible, and the panel that generates heat also can be to pan back radiation, helps the improvement of the heat energy efficiency utilization ratio of whole. As shown in fig. 7, it shows an example that the panel 2 is provided with a large-area heat-reflecting layer 4, in this example, the surface area of the heat-reflecting layer 4 is larger than the area of the bottom surface of the pot 1, which enhances the heat-reflecting effect of the heat-reflecting layer 4.
As a preferred embodiment of the present application, as shown in fig. 11, a pattern layer 10 is further disposed in the heat-transfer layer 4, that is, the heat-transfer layer 4 in this embodiment is compatible with the pattern design in addition to having the function of reflecting heat radiation, so as to beautify the appearance of the panel 2 and enjoy the user experience. It should be noted that the pattern layer 10 is not limited to the star pattern shown in the figures, and other pattern types may also be adopted, and the specific type, combination form and formation form of the pattern are not particularly limited in this embodiment.
In the application, the total energy reflectivity of the heat-reflecting layer 4 to the full-band infrared ray is more than 60%. This application is to heat-transfer layer 4 is in form of formation on panel 2 does not do specifically and restricts, and in a specific embodiment, heat-transfer layer 4 coat in panel 2, in another specific embodiment, heat-transfer layer 4 silk screen printing sintering in panel 2 has guaranteed under the high temperature culinary art condition, heat-transfer layer 4's stability.
In the present application, the structure and arrangement of the boss 3 may adopt any one of the following embodiments:
the first implementation mode comprises the following steps:
as shown in fig. 1 to 3, the boss 3 is closed ring-shaped, the top of the boss 3 has a sealing part, so that the bottom edge of the pot 1 on the panel 2 is in sealing fit with the boss 3, the lower surface of the boss 3 is in sealing fit with the panel 2, and a closed air chamber 9 is formed between the panel 2 and the pot 1. The existence of the closed air chamber enables the hot air in the closed air chamber 9 to be isolated from the outside air, so that the inside air and the outside air do not have large-range convection heat exchange, and the rapid loss of a large amount of heat at the bottom of the cooker 1 is avoided. This embodiment suppresses the heat loss from "conduction", "radiation", "heat exchange" three layer face, has reduced calorific loss by a wide margin, has promoted electromagnetic cooking utensil's cooking efficiency, and reduced to the inside heat radiation of cooking utensil has reduced the inside temperature rise of cooking utensil, has protected the inside components and parts of cooking utensil.
Proved by verification, when the boss 3 is in a closed ring shape and the color of the boss 3 is dark color system, such as black, the heat energy utilization rate of the electromagnetic cooking appliance can be improved by 1.5-1.8% in comparison with the common prior art that neither a heat reflecting layer nor a boss is arranged on a panel in the operation process of the electromagnetic cooking appliance. Further verification shows that when the boss 3 is in a closed ring shape and the color of the boss 3 is a light color system, such as white, yellow, green, gray, red, etc., the heat energy efficiency utilization rate of the electromagnetic cooking appliance can be improved by 1.7% -2.0% in comparison with the common prior art that neither a heat reflecting layer nor a boss is arranged on a panel in the operation process of the electromagnetic cooking appliance.
As can be seen from the above, the scheme of additionally providing the bosses and the heat-reflecting layers can improve the heat energy utilization rate by 1.5% -2.0% compared with the prior art of not providing the heat-reflecting layers nor the bosses, and compared with 0.1% which can be improved by only additionally providing the heat-reflecting layers, the scheme has the advantages of remarkably improving the heat energy utilization rate, low cost and easier realization compared with the high-cost scheme of wire coil improvement. The reason why the scheme of the embodiment can significantly improve the heat energy utilization rate is as follows. The heat transferred downwards by the cookware can be utilized, the heat transfer form from the panel to the inside of the cooking utensil is heat conduction and radiation, and the heat causes the whole heating of the panel and the temperature rise inside the cooking utensil. However, under the working condition of the electromagnetic cooking appliance, the temperature is not too high (100-120 ℃ under steady state boiling, about 300 ℃ under the extreme working condition of quick-frying, the higher the temperature can start the protection program), the downward heat transfer of the bottom of the pan in the prior art is mainly heat conduction, the heat radiation is assisted (the lower the temperature is, the smaller the occupation ratio of the heat transfer through radiation is), the heat conductivity coefficient of the panel is high, the area is large, and the heat radiation is easy to realize, therefore, even if the heat radiation is completely utilized through the heat reflecting layer in the prior art, because of the direct contact of the pan bottom and the panel, most of the heat of the pan bottom can still be dissipated through the panel with good heat conduction, and the improvement of the heat energy utilization rate is limited. The heat insulation gap is arranged between the pot bottom and the panel, and the heat conduction coefficient of the air medium in the heat insulation gap is only about 0.02W/(m.K), so that the heat transfer rate from the pot bottom to the panel is greatly reduced; and the further optimized closed air chamber avoids the heat convection with ambient atmosphere on the peripheral side, so that the heat transfer is further reduced. As for the arrangement of the heat-back layer, a part of the radiation heat is also utilized.
As a preferred embodiment of the present embodiment, the thickness of the closed air chamber is 0.5-4mm, and the thickness enables the cookware 1 and the panel 2 to have a sufficient heat insulation gap, so as to reduce the heat transfer from the cookware 1 to the panel 2, and enable the cookware 1 to be in the magnetic field range of the heating unit 5, thereby ensuring the utilization rate of heating energy efficiency.
As a preferred example of the present embodiment, the boss 3 is made of an elastic material, and the thermal conductivity of the boss 3 is not more than 0.28W/(m · K). Boss 3 is made by elastic material, on the one hand, is arranged in as pan 1 during boss 3, easily with boss 3's top forms sealed cooperation, realizes good sealed effect, helps the formation of closed air chamber has completely cut off the convection current, has realized the thermal-insulated function that keeps warm, and on the other hand, pan 1 is placed on boss 3, because of boss 3's elastic characteristic, can play the effect of making an uproar falls in the damping, and in addition, elastic material has great coefficient of friction, has the function that prevents pan 1 and slide, has strengthened the stability of support. In this embodiment, the material of the boss 3 includes, but is not limited to, elastomers such as silicon rubber, vulcanized rubber, cork, and the like, and non-elastomers such as slag wool, fiber felt, fiber cloth, leather, artificial leather, paper, wood, silk, various non-heat-conductive plastics, and the like.
The second embodiment:
the structure and principle of this embodiment are basically the same as those of the first embodiment, except that: as shown in fig. 4 and 5, the outer surface of the heating zone is provided with a plurality of bosses 3, the plurality of bosses 3 are arranged at intervals, and of two adjacent bosses 3, the height of the boss 31 positioned at the inner side is lower than that of the boss 32 positioned at the outer side or flush with each other. In this embodiment, the boss 31 located on the inner side can be adapted to the pot 11 with smaller bottom diameter, and the boss 32 located on the outer side can be adapted to the pot 12 with larger bottom diameter, so that the application range of the electromagnetic cooking appliance is enhanced. The height of the inner and outer bosses avoids the influence on the support of the large-size cookware 1 caused by the inner bosses 31 being higher than the outer bosses 32.
Although the plurality of bosses 3 are provided in the present embodiment, the plurality of bosses 3, the cookware 1 matched with the bosses 3, and the panel 2 can still cooperate with each other to form the closed air chamber according to the first embodiment, and the influence of the closed air chamber on the heat energy utilization rate is as described in the first embodiment, which is not described herein again.
The third embodiment is as follows:
as in the second embodiment, the outer surface of the heating zone in this embodiment is provided with a plurality of bosses 3, and the plurality of bosses 3 are arranged at intervals. However, this embodiment is significantly different from the first and second embodiments in that: as shown in fig. 6, the plurality of bosses 3 enclose a non-closed ring structure, i.e. in the present embodiment, when the pot 1 is placed on the boss 3, the closed air chamber as described in the first and second embodiments cannot be formed between the pot 1, the boss 3 and the panel 2, and compared with the two embodiments, a part of heat emitted from the bottom of the pot 1 in the present embodiment is dissipated to the outside through the two bosses 3 connected to each other, which causes a certain heat loss, therefore, the heat energy utilization rate of the present embodiment is reduced to a certain extent compared to the first and second embodiments, but it is verified that, during the operation of the electromagnetic cooking apparatus of the present embodiment, compared with the common prior art that the heat-resisting layer and the lug boss are not arranged on the panel, the heat energy efficiency utilization rate of the heat-resisting plate is obviously improved. Experiments prove that in a specific example under the embodiment, as shown in fig. 6, 3 bosses are arranged on the panel, the cross section of each boss along the horizontal direction is arc-shaped, and the sum L of the circumferences of the 3 bosses 1 The circumference L of a complete ring having the same radius of curvature as the arc 2 When L is present 1 And L 2 When the ratio of the heat energy to the heat energy is 2:3, the heat energy utilization rate of the electromagnetic cooking appliance can be improved by 1.1% -1.3% on the same scale.
The fourth embodiment:
the outer surface of the heating area in this embodiment is provided with a plurality of bosses 3, the plurality of bosses 3 are arranged at intervals, but the difference from the third embodiment is that, as shown in fig. 8, in this embodiment, the plurality of bosses 3 are a plurality of protruding points arranged in a ring shape, that is, the contact area between each boss and the bottom surface of the pot in this embodiment is smaller than the contact area between each boss and the bottom surface of the pot in the third embodiment, the bosses in this embodiment realize point support for the pot, and a gap is formed between two adjacent bosses in this embodiment, so that the closed air chamber as described in the first embodiment and the second embodiment cannot be formed, compared with the two embodiments, a part of heat emitted from the bottom of the pot 1 in this embodiment is dissipated to the outside through two connected bosses 3, which causes a certain heat loss, therefore, the heat energy utilization rate of the present embodiment is reduced to a certain extent compared to the first and second embodiments, but it is verified that, in the operation process of the electromagnetic cooking apparatus in the present embodiment, the heat energy utilization rate can be improved by 0.9% to 1.0% compared to the common prior art that neither the heat-reflective layer nor the boss is provided on the panel. Because of the existence of thermal convection between the thermal insulation gap and the ambient atmosphere, the improvement of the thermal efficiency is slightly worse than that of the embodiment, and because the thermal insulation gap is thinner, the thermal convection is not significant, so that the thermal efficiency of the thermal insulation gap used as an air medium is improved better than that of the pan bottom and the panel which are in direct contact heat conduction.
Moreover, compared to the first and second embodiments, the boss 3 in the third and fourth embodiments is simpler to manufacture, saves material, reduces cost, and is convenient to assemble to the panel 2.
Table 1 shows a comparison table of the first prior art (only the heat-reflecting layer is added to the panel) and the improvement of the heat energy efficiency utilization rate in the embodiments of the present application, compared to the prior art in which the pot is placed on the panel and directly contacts with the panel without the heat-reflecting layer on the panel.
Table 1 comparison table for heat energy efficiency utilization rate in prior art
No matter in any one of the above four embodiments, as preferred, boss 3 is the taper of narrow top down width, the upper portion of boss 3 is narrower, can reduce pan 1 with the area of contact of boss 3 reduces pan 1 to the heat transfer of boss 3, the extension the life of boss 3, the lower part volume of boss 3 is great, can increase the stability that boss 3 supported.
The fixing manner of the boss 3 on the panel 2 is not particularly limited in the present application. In a specific example, the boss 3 is fixedly mounted on the panel 2, and the bottom surface of the boss 3 is in sealing fit with the panel 2. In another specific example, the boss 3 is placed in the package of the product as an accessory, and the user can select whether to configure the boss 3 according to the need of improving the heat energy utilization rate, and certainly, as an optimal choice, a fixing member, such as a double-sided tape, for fixing the boss 3 by the user can be placed in the package assembly of the product, so as to meet different needs of different users.
In order to realize the temperature measurement to pan 1 to the realization is to the accurate control of heating, in this application electromagnetic cooking utensil still includes the temperature measurement unit, the temperature measurement unit can adopt arbitrary one or two kinds in the following embodiment:
example 1: as shown in fig. 9, the electromagnetic cooking appliance further comprises a movable temperature measuring element 6, the panel 2 is provided with a through hole matched with the movable temperature measuring element 6, and the movable temperature measuring element 6 is in contact with the pot 1 placed on the panel 2 through the through hole. In this embodiment, the position of the through hole is not specifically limited, and it may be disposed at the center of the heating area as shown in fig. 9, or may be disposed at a non-center of the heating area, as long as the movable temperature measuring element 6 can extend out to contact with the pot 1 to measure the temperature.
Example 2: as shown in fig. 10, the electromagnetic cooking appliance further comprises an infrared temperature measuring element 7 arranged in the base, the panel 2 is provided with a light transmission area 8 corresponding to the position of the infrared temperature measuring element 7, and the infrared temperature measuring element 7 collects the temperature of the pot 1 placed on the panel 2 through the light transmission area 8. The heat reflecting layer 4 is not arranged in the light transmitting area 8, so that the infrared temperature measuring element 7 can transmit the light transmitting area 8 to collect the temperature of the pot 1.
In order to further improve the heat-reflecting effect, as a preferred embodiment of the present application, a heat-insulating member, such as a mica plate, heat-insulating cotton, or the like, is disposed between the inner surface of the panel 2 and the heating unit 5.
Where not mentioned in this application, can be accomplished using or referencing existing technology.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. An electromagnetic cooking appliance, comprising a base and a panel arranged on the base, wherein the base is internally provided with a heating unit, the panel is used for bearing a cooker, the panel is provided with a heating zone corresponding to the position of the heating unit, the electromagnetic cooking appliance is characterized in that,
the outer surface of the heating area is provided with a boss for supporting the cookware, so that a heat insulation gap exists between the cookware placed on the panel and the panel;
the outer surface of the heating zone also has a heat-reflecting layer for reflecting heat radiated to the panel;
the boss is closed cyclic annular, the top of boss has the sealing, make place in the pan bottom border of panel with sealed cooperation between the boss, the boss lower surface is laminated with the panel is sealed, with the panel with form the closed air chamber between the pan.
2. The electromagnetic cooking appliance of claim 1,
the thickness of the closed air chamber is 0.5-4 mm.
3. An electromagnetic cooking appliance according to claim 1 or 2,
the heat-reflecting layer is arranged on the surface of the panel, which is covered by the heat-reflecting layer, and is opposite to the bottom surface of the cookware.
4. An electromagnetic cooking appliance according to claim 1 or 2,
the electromagnetic cooking appliance also comprises a movable temperature measuring element, the panel is provided with a through hole matched with the movable temperature measuring element, and the movable temperature measuring element is contacted with a cooker placed on the panel through the through hole;
and/or, electromagnetic cooking utensil still including set up in infrared temperature element in the base, the panel have with the corresponding printing opacity district in infrared temperature element position, infrared temperature element passes through printing opacity district is gathered and is put in the temperature of the pan of panel.
5. The electromagnetic cooking appliance of claim 4,
the bottom surface of the pot is projected on the panel and is positioned in the heat reflecting layer.
6. An electromagnetic cooking appliance according to claim 1 or 2,
and a pattern layer is also arranged in the heat reflecting layer.
7. The electromagnetic cooking appliance of claim 1,
the boss is made of an elastic material, and the thermal conductivity coefficient of the boss is not more than 0.28W/(m.K).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010189074.XA CN111396937B (en) | 2020-03-18 | 2020-03-18 | Electromagnetic cooking utensil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010189074.XA CN111396937B (en) | 2020-03-18 | 2020-03-18 | Electromagnetic cooking utensil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN200952753Y (en) * | 2006-04-10 | 2007-09-26 | 袁明 | Electromagnetic oven |
| CN201152568Y (en) * | 2008-01-04 | 2008-11-19 | 于志民 | Electromagnetic oven panel |
| CN204006174U (en) * | 2014-07-28 | 2014-12-10 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic oven and pan |
| CN205641037U (en) * | 2016-05-16 | 2016-10-12 | 温州凯唐电子科技有限公司 | Adjustable bearing structure of electromagnetism stove |
| CN208058945U (en) * | 2018-04-17 | 2018-11-06 | 佛山市顺德区美的电热电器制造有限公司 | Panel and cooking apparatus |
| CN208871687U (en) * | 2018-10-18 | 2019-05-17 | 中山市华丹电器制造有限公司 | A kind of safety induction cooker |
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