WO2019029710A1 - 加热器具 - Google Patents

加热器具 Download PDF

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Publication number
WO2019029710A1
WO2019029710A1 PCT/CN2018/099993 CN2018099993W WO2019029710A1 WO 2019029710 A1 WO2019029710 A1 WO 2019029710A1 CN 2018099993 W CN2018099993 W CN 2018099993W WO 2019029710 A1 WO2019029710 A1 WO 2019029710A1
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WO
WIPO (PCT)
Prior art keywords
color
layer
heating device
heating
changing pattern
Prior art date
Application number
PCT/CN2018/099993
Other languages
English (en)
French (fr)
Inventor
李志猛
黄宇华
熊君
钟春发
赵国尧
Original Assignee
佛山市顺德区美的电热电器制造有限公司
Priority date (The priority date 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 date listed.)
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Publication date
Priority claimed from CN201720999644.5U external-priority patent/CN208658659U/zh
Priority claimed from CN201721010451.9U external-priority patent/CN208243382U/zh
Application filed by 佛山市顺德区美的电热电器制造有限公司 filed Critical 佛山市顺德区美的电热电器制造有限公司
Publication of WO2019029710A1 publication Critical patent/WO2019029710A1/zh

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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

Definitions

  • the invention relates to the field of household appliances, and in particular to a heating appliance.
  • the existing solution is to print the color changing ink on the surface of the bottom of the pot.
  • the color change of the ink is used to remind the user to cook the oil, but the color changing ink is usually printed in the center of the bottom of the pot, which happens to be Blind areas heated by open flames and induction cookers cause delays in discoloration and do not effectively alert the user to how much oil to put.
  • the object of the present invention is to provide a heating device capable of indicating temperature in time in order to overcome the defect that the discoloration layer has a discoloration delay due to the discoloration of the color changing layer, thereby failing to display temperature in time.
  • the present invention provides a heating appliance comprising:
  • a color changing layer formed on an inner surface of the heating body, wherein the color changing layer is in the form of a long line, and the color changing layer changes color in a reversible manner with changes in temperature.
  • the heating device further includes a coloring layer and an intermediate coating layer sequentially formed on an inner surface of the substrate of the heating body, the intermediate coating layer being formed on a partial region of an upper surface of the coloring layer, The color changing layer is formed on a partial region of the upper surface of the intermediate coating.
  • a groove is formed on an inner surface of the heating body, and the color changing layer is disposed on the groove.
  • the distance from which the color-changing layer is formed to the center of the substrate of the heating body is 20-70%, more preferably 40-60%, of the radius of the substrate of the heating body.
  • the color changing layer is an annular pattern surrounding the center of the substrate of the heating body.
  • the color changing layer comprises at least two color changing pattern layers.
  • the at least two color-changing pattern layers are stacked on each other, and between the two color-changing pattern layers adjacent to each other, the upper color-changing pattern layer partially covers the color-changing pattern layer located below.
  • the at least two color-changing pattern layers are different in color at normal temperature, the colors are the same at a predetermined temperature, or
  • the at least two color-changing pattern layers have the same color at normal temperature, and the colors are different at a predetermined temperature.
  • the heating device further includes a coloring layer and an intermediate coating layer sequentially formed on an inner surface of the substrate of the heating body, the color changing layer including a first color changing pattern and a second color changing pattern, the middle coating a layer is formed on a partial region of an upper surface of the coloring layer, the first color changing pattern is formed on a partial region of an upper surface of the intermediate coating layer, and the second color changing pattern is formed on a portion of an upper surface of the coloring layer region.
  • the color changing layer including a first color changing pattern and a second color changing pattern
  • the middle coating a layer is formed on a partial region of an upper surface of the coloring layer
  • the first color changing pattern is formed on a partial region of an upper surface of the intermediate coating layer
  • the second color changing pattern is formed on a portion of an upper surface of the coloring layer region.
  • the upper surface of the second color changing pattern is not higher than the upper surface of the middle coating layer.
  • the second color changing pattern is located in the middle of the base of the heating body.
  • the first color changing pattern is formed around an outer circumference of the second color changing pattern.
  • the first color changing pattern, the second color changing pattern, and the color layer are the same color; at a predetermined temperature, the color of the first color changing pattern and the second color changing pattern It is different from the color of the color layer.
  • the second color changing pattern is in the form of oil droplets.
  • the first color changing pattern is a plurality of concentric rings or sectors.
  • an inner coating layer is further formed on the inner surface of the heating body, the undercoat layer directly covers the entire inner surface of the heating body, and a color changing layer is formed on the upper surface of the undercoat layer.
  • the color changing layer and the undercoat layer exhibit different colors.
  • the heating device further includes a magnetic conductive layer formed on an outer surface of the heating body.
  • a transparent top coat formed on the innermost layer of the inner surface of the heating device is further included.
  • the heating device is a wok
  • the heating body includes an outer layer of iron and an inner layer of aluminum, and the color changing layer is formed on the inner layer of the aluminum.
  • the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery.
  • the outer layer of the outer layer of the iron has a hollow circular through hole, and the inner layer of the aluminum is pressed and protruded into the through hole, and at least one vertical projection of the through hole is located at the color changing layer. Within the area.
  • the coating material forming the color-changing layer contains iron oxide and perylene.
  • the color changing layer is formed by printing.
  • the invention also provides a heating device suitable for electromagnetic heating, the heating device comprising:
  • a color changing layer formed on an inner surface of the heating body, and the coloring layer is formed at a position near a center of the base of the heating body;
  • the color changing layer changes color in a reversible manner with changes in temperature.
  • the distance from which the color-changing layer is formed to the center of the substrate of the heating body is 20-70%, more preferably 40-60%, of the radius of the substrate of the heating body.
  • the setting of the color changing layer can serve as a temperature indicating to remind the user to start using (oil discharging cooking) and at the same time, it is convenient for the user to determine the discharging amount (especially the amount of oil).
  • the heating device is an appliance for electromagnetic heating, in which case the color changing layer is formed near the center of the substrate, avoiding the heating dead zone (ie, the center of the substrate), so that it can be reflected in a more timely manner. The substrate temperature changes.
  • FIG. 1A is a schematic structural view of a heating device according to an embodiment of the present invention.
  • FIG. 1B is a schematic structural view of a heating device according to another embodiment of the present invention.
  • FIG. 1C is a schematic view showing the appearance of a heating device according to a preferred embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a heating device according to a preferred embodiment of the present invention.
  • FIG. 3A is a schematic structural view of a heating device according to the present invention.
  • 3B is a schematic structural view of a heating body in the heating device according to the present invention.
  • 3C is a schematic view showing the appearance of an embodiment of the heating device according to the present invention.
  • 3D is a schematic view showing the appearance of another embodiment of the heating device according to the present invention.
  • 3E is a schematic view showing the appearance of another embodiment of the heating device according to the present invention.
  • FIG. 4A is a schematic structural view of a heating device according to an embodiment of the present invention.
  • FIG. 4B is a schematic structural view of a heating device according to another embodiment of the present invention.
  • FIG. 4C is a schematic structural view of a heating device according to another embodiment of the present invention.
  • the heating appliance of the present invention comprises:
  • the color changing layer 20 is in the form of a long line so as to function as a gauge
  • the color changing layer 20 changes color in a reversible manner with changes in temperature.
  • the color changing layer 20 is formed at a position not at the center of the base of the heating body, but in the vicinity of the center of the base of the heating body, avoiding the heating of the heating device (such as gas)
  • the heating dead zone at the center of the base of the main body is heated, and the position near the center of the base of the heating body is the maximum energy position of heating, and thus, by forming a color changing layer in the vicinity of the center of the base of the heating body, it is possible to more timely The change in the temperature of the substrate of the heated body is reflected.
  • the minimum distance of the color changing layer 20 from the center of the substrate of the heating body is 25-30 mm.
  • the shape of the color changing layer 20 is not particularly limited, and various conventional geometric shapes or irregular shapes may be used.
  • the color changing layer 20 is an annular line (as shown in Fig. 1C) surrounding the center of the substrate of the heating body or a sector (e.g., a "Wifi" fan shape) centered on the center of the substrate of the heating body.
  • the inner cavity of the heating device has a concave structure, and the center of the base of the heating body is a lowest point of depression.
  • the oil added to the heating device is collected toward the center of the base of the heating body, so that the amount of oil can be measured more accurately and accurately.
  • the color changing layer 20 may be a single pattern layer or a plurality of pattern layers.
  • the color-changing layer 20 is 2-10 (more preferably 2-5) color-separating patterns separated from each other.
  • the pattern layers may be formed on the same surface or may be formed on different surfaces.
  • a plurality of color-changing pattern layers i.e., color-changing layers
  • FIG. 1A a plurality of color-changing pattern layers (i.e., color-changing layers) are formed on the upper surface of the undercoat layer 21.
  • a plurality of color-changing pattern layers i.e., color-changing layers
  • FIG. 1B a partial color-changing pattern layer is formed directly on the upper surface of the undercoat layer 21, and then covered.
  • the topcoat 25 is transparent and then another layer of color changing patterns is formed.
  • the plurality of color-changing pattern layers may have the same color-changing effect, or at least two color-changing patterns may have different color-changing effects.
  • the plurality of color-changing pattern layers have the same color at normal temperature, when the substrate of the heating body is heated to a predetermined temperature (eg, 170 ° C or higher, preferably 175 ° C or higher, more preferably 175-200 ° C, most preferably 180) When the temperature is about °C, the color of these color-changing pattern layers changes, from shallow to deep or from deep to shallow.
  • the plurality of color-changing pattern layers have the same color at normal temperature, when the substrate of the heating body is heated to a predetermined temperature (eg, 170 ° C or higher, preferably 175 ° C or higher, more preferably 175-200 ° C, most preferably At about 180 ° C, the color of these color-changing pattern layers changes from shallow to deep or from deep to light, and finally the color of all the color-changing pattern layers becomes the same color.
  • a predetermined temperature eg, 170 ° C or higher, preferably 175 ° C or higher, more preferably 175-200 ° C, most preferably At about 180 ° C.
  • the color changing layer 20 is formed as an oil scale line (such as a plurality of concentric rings or a plurality of concentric sectors).
  • the color-changing layer 20 can not only function as a temperature to remind the user to start the oil-discharging cooking, but also can display the oil discharge amount.
  • the heating device may further include an undercoat layer 21.
  • the undercoat layer 21 directly covers the entire inner surface of the heating body 10, and the color changing layer 20 is formed on the upper surface of the undercoat layer 21.
  • the color changing layer 20 and the undercoat layer 21 exhibit different colors, specifically, the color changing layer 20 and the undercoat layer 21 are different in color at a normal temperature, and are at a predetermined temperature (for example, 170 ° C or higher).
  • the color of the lower color changing layer 20 and the undercoat layer 21 is also different, preferably 175 ° C or higher, more preferably 175 to 200 ° C, and most preferably about 180 ° C.
  • the undercoat layer 21 is preferably black.
  • the undercoat layer 21 can function as a color lining, so that the user pays more attention to the change in color of the color changing layer 20.
  • the undercoat layer 21 may be formed of a dark base oil which is conventional in the art, and the dark base oil may contain, for example, polytetrafluoroethylene and a black pigment.
  • the heating device may further include a transparent top coat layer 25.
  • the color changing layer 20 includes a plurality of mutually separated color changing patterns, and the color changing patterns are divided into two portions by the transparent top coating layer 25, and a portion is located on the upper surface of the transparent top coating layer 25, Another portion is located between the undercoat layer 21 and the clear topcoat layer 25.
  • the transparent top coat 25 is formed on the innermost layer of the inner surface of the heating device, that is, the transparent top coat 25 completely covers the undercoat layer 21 and the color change layer 20.
  • the transparent top coat 25 may be formed of a heat resistant, transparent material conventional in the art, for example, may be formed of polytetrafluoroethylene.
  • the color-changing layer 20 may be formed of a coating material containing a chemical substance that changes color in a reversible manner with changes in temperature.
  • the coating material forming the color-changing layer 20 contains iron oxide and perylene.
  • the heating device is a wok
  • the heating body 10 includes an outer layer of iron and an inner layer of aluminum
  • the color changing layer 20 is formed on the inner layer of aluminum.
  • the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery.
  • the outer layer of the outer layer of the iron has a hollow circular through hole, and the inner layer of the aluminum is pressed and protruded into the through hole, and at least one vertical projection of the through hole is located in the discoloration Within the area formed by layer 20.
  • the contact area between the inner layer of aluminum and the outer layer of iron can be increased, and the heat of the outer layer of iron can be quickly transferred into the pot, so that the discoloration is more accurate and timely;
  • the wok when the wok is placed in the gas
  • the firepower of the center of the gas stove can be directly transmitted to the color changing material through the aluminum layer in the through hole opposite to the color changing area, thereby further improving the accuracy and timeliness of the discoloration of the wok.
  • the color-changing layer 20 can be formed by a method conventional in the art. In the preferred case, the color changing layer 20 is formed by printing.
  • the heating device includes:
  • a color changing layer 20 is formed on a partial region of the upper surface of the undercoat layer 21, and the color changing layer 20 includes a plurality of color changing pattern layers which are concentric rings surrounding the center of the substrate of the heating body, and the color changing pattern layers are Reversible way to change color as temperature changes;
  • the transparent topcoat 25 of the undercoat layer 21 and the color changing layer 20 is completely covered.
  • the heating device of the above embodiment when it is a pot, the color of the color changing layer 20 is changed from shallow to deep when the temperature of the heating device is raised from normal temperature to a suitable cooking temperature, that is, about 180 ° C during the hot pot before cooking the food. Or to change from deep to light, to remind the user that oil can be used for cooking at this time, avoiding the problem that the temperature is too low or too high, resulting in poor cooking effect and large cooking fumes; and different loop lines in the color changing layer 20 can To show the effect of the amount of oil discharged.
  • the temperature of the substrate of the heating body is restored to normal temperature, and the color changing layer 20 is restored to the color state before the temperature rise, that is, the color of the color changing layer 20 is reversibly changed with temperature.
  • the color changing layer 20 is formed under the transparent top coat layer 25, so that the color changing layer 20 can be effectively protected from falling off during long-term use to lose the effect.
  • the heating device includes:
  • first color changing pattern layer formed on a partial region of an upper surface of the undercoat layer 21, the first color changing pattern layer being an annular shape surrounding a center of the substrate of the heating body;
  • a transparent topcoat 25 completely covering the undercoat layer 21 and the first color changing pattern layer;
  • the color-changing pattern layer is a concentric ring shape, and both change color in a reversible manner with changes in temperature.
  • the heating device when it is a pot, during the hot pot before cooking the food, the temperature of the heating device is raised from the normal temperature to a suitable cooking temperature, that is, about 180 ° C, the first color changing pattern layer and the second The color of the color-changing pattern layer is changed from shallow to deep or from deep to light, thereby reminding the user that the oil can be used for cooking at this time, avoiding the problem that the cooking temperature is too low or the cooking smoke is too high, and the cooking fumes are large;
  • the different loop lines formed by the one color-changing pattern layer and the second color-changing pattern layer can function to show the amount of oil discharged.
  • the inner surface of the base of the heating body 10 may be sequentially formed with a coloring layer and a middle coating layer, the middle coating layer is formed on a partial area of the upper surface of the color layer, and the discoloration The layer is disposed in a localized area of the upper surface of the intermediate coating.
  • a coloring layer and a reversible color changing layer are formed on the inner surface of the heated substrate, and by adjusting the color of the coloring layer and the reversible color layer, the pattern on the inner surface of the heating device can be changed from a plurality of colors to a single color.
  • the heating device of the present invention comprises:
  • a heating body 10 comprising a heated substrate
  • the first color changing pattern 30 is formed on a partial region of the upper surface of the intermediate coating layer 24, and the first color changing pattern 30 changes color in a reversible manner with changes in temperature.
  • the intermediate coating layer 26 is generally a dark oil layer formed between the first color changing pattern 30 and the color layer 23 to increase wear resistance and strengthen the first color changing pattern 30 and the coloring layer 23 The bond between the two.
  • the heating device further includes a second color changing pattern formed on a partial area of the upper surface of the color layer 23, the second color changing pattern changing color in a reversible manner with changes in temperature.
  • the second color changing pattern is formed directly on the color-imparting layer 23, closer to the substrate of the heated heating body 10 than the first color-changing pattern 30, and the temperature change is more sensitive.
  • the middle coating layer 24 and the second color changing pattern are juxtaposed on the same surface, and the middle coating layer 24 and the second color changing pattern are not completely together.
  • the entire upper surface of the color grading layer 23 is covered so that the heating device can see the color pattern of the color grading layer 23, the first color changing pattern 30, and the second color changing pattern in appearance.
  • the upper surface of the second color changing pattern is not higher than the upper surface of the intermediate coating layer 24. More preferably, the thickness of the second color changing pattern is smaller than the thickness of the intermediate coating layer 24.
  • the second color changing pattern may be formed on any surface of the upper surface of the color layer 23 that is not covered by the intermediate coating layer 24.
  • the second color changing pattern is located in the middle of the base of the heating body 10, and the intermediate coating layer 24 is formed around the circumference of the second color changing pattern.
  • the first color changing pattern 30 formed on the upper surface of the intermediate coating layer 24 is also formed around the outer circumference of the second color changing pattern.
  • the heating device is made to have a color pattern of the coloring layer 23 and the second color changing pattern visible in the middle of the inner surface of the heating device, and the color pattern of the first color changing pattern 30 surrounds the coloring layer 23 and the second color changing. The outer circumference of the pattern. In this case, when the color of the second color changing pattern (a color pattern in which the temperature change is relatively sensitive) changes, it can be more easily perceived by the user.
  • the first color changing pattern 30, the second color changing pattern, and the color layer 23 have the same color; at a predetermined temperature, the first color changing pattern 30 and the first The color of the two color changing patterns is different from the color of the coloring layer 23.
  • predetermined temperature refers to a temperature suitable for a user to perform an operation with the heating device.
  • the "predetermined temperature” means that the cook is suitable for cooking.
  • the temperature may usually be 170 ° C or higher, preferably 175 ° C or higher, more preferably 175 to 200 ° C, and most preferably about 180 ° C.
  • the same color is not a single color that is completely consistent. In actual use, the color is allowed to be different but the human eye is difficult to distinguish.
  • the color-imparting layer 23, the first color-changing pattern 30, and the second color-changing pattern are both light colors (such as light red) at normal temperature, when the substrate of the heating body 10 is When the temperature is raised to a predetermined value, the colors of the first color changing pattern 30 and the second color changing pattern are changed from shallow to deep, so that the color layer 23 and the first color changing pattern 30 and the second color changing layer The colors of the patterns are different. In this case, only the first color changing pattern 30 and the second color changing pattern may be invertible colors, and the first color changing pattern 30 and the second color changing pattern increase with temperature.
  • the color thereof changes, and when the temperature of the substrate of the heating body 10 rises to a predetermined value, the colors of the first color changing pattern 30 and the second color changing pattern change from light color to dark color, so that the inside of the heating device
  • the surface exhibits a pattern having a different color at a predetermined temperature.
  • the color change of the second color-changing pattern can achieve a good temperature-sensing effect.
  • the heating device is a cookware
  • the second color changing pattern is preferably oil drop in order to remind the cook to cook at a suitable temperature for cooking.
  • the first color changing pattern 30 may be made into an oil amount scale line to have a function of indicating the amount of oil discharged. During heating, the first color changing pattern 30 is discolored when heated to a predetermined temperature, thereby alerting the user to drain the oil and indicating the amount of oil discharged.
  • the first variation pattern 30 may be formed in a conventional shape having a metering function, such as a plurality of concentric rings or sectors (such as a "Wifi" fan shape).
  • each of the color-imparting layer 23, the first color-changing pattern 30, and the second color-changing pattern may be invertible colors, each of which may be changed by a change in temperature in a reversible manner.
  • a coating material of a color chemical is formed.
  • the coating material A forming the color-coded layer 23 contains iron oxide, perylene red and black pigment, the coating material B forming the second color-changing pattern, and the coating forming the first color-changing pattern 30.
  • the layer materials C are the same or different and each contain iron oxide and perylene. In a preferred case, the proportion of iron oxide contained in the coating material A is different from the ratio of the iron oxide contained in the coating material B and the coating material C.
  • the heating device may further include an undercoat layer 21 formed under the color-coded layer 23.
  • the undercoat layer 21 covers the entire inner surface of the substrate of the heating body 10; the color layer 23 covers the entire upper surface of the undercoat layer 21; and the second color changing pattern is formed on the coloring layer.
  • the middle portion of the second color changing pattern is formed and separated from the second color changing pattern (i.e., not connected to each other); the first color changing pattern 30 is formed in a partial region of the upper surface of the intermediate coating layer 24.
  • the heating device may further include a transparent top coat layer 25 formed on the innermost surface of the inner surface of the heating device.
  • the color pattern of the color-coded layer 23, the first color-changing pattern 30, and the second color-changing pattern can be seen through the transparent top coat layer 25.
  • the intermediate coating layer 24 may be formed of a dark colored oil conventional in the art, which may contain, for example, polytetrafluoroethylene and a black pigment.
  • the second color changing pattern is configured as a letter or a pattern, and a total area of the color layer 23 is larger than a total area of the second color changing pattern, the lining The color layer 23 has a color change smaller than the second color change pattern.
  • the center of the base of the heating body 10 is convex upward, and the second color changing pattern is located at the upper end surface of the convex portion.
  • the second color changing pattern since the second color changing pattern is at a high position, it protrudes slightly from the surface of the substrate, so that it is not easily covered by oil or sauce during cooking, and is more easily observed by the user.
  • the heating device is a wok
  • the base of the heating body 10 includes an outer layer of iron and an inner layer of aluminum
  • the color layer 23 and/or the first A two-color changing pattern is formed on the inner layer of the aluminum and located in the middle of the wok.
  • the color change in the center of the wok is the easiest to observe, but when heating on the induction cooker, the induction coil of the induction cooker is wound (the induction cooker is not wound around the induction coil), so that it is opposite to the center of the wok.
  • the part of the induction coil is missing, and the temperature directly opposite to the induction coil is too high (this is also the reason why the base radius of the heating body is easily burned at 1/2), and the heat transfer efficiency of iron is very low.
  • the inner layer of aluminum can transfer the heat of the base of the heating body and the opposite part of the induction coil to the center of the base of the heating body, so that the color changing pattern can reflect the temperature of the base of the heating body more timely, accurately and truly.
  • the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery.
  • the outer layer of the outer layer of the iron has a hollow circular through hole, and the inner layer of the aluminum is pressed and protruded from the through hole, and a vertical projection of at least one of the through holes is located in the lining The region consisting of the color layer 23 and the second color changing pattern.
  • the contact area between the inner layer of aluminum and the outer layer of iron can be increased, and the heat of the outer layer of iron can be quickly transferred into the pot, so that the discoloration is more accurate and timely;
  • the wok when the wok is placed in the gas
  • the firepower of the center of the gas stove can be directly transmitted to the color changing material through the aluminum layer in the through hole opposite to the color changing area, thereby further improving the accuracy and timeliness of the discoloration of the wok.
  • each of the color-imparting layer 23, the second color-changing pattern, and the first color-changing pattern 30 may be formed by a method conventional in the art.
  • the color-coded layer 23 is formed by spraying, and the second color-changing pattern and the first color-changing pattern 30 are each formed by printing.
  • the coloring layer 23 has a large area and is formed by spraying, and can be more uniformly coated on the substrate or the undercoat layer.
  • the first color changing pattern 30 and the second color changing pattern have a small area, and the printing method is more efficient. .
  • the heating device comprises:
  • a heating body 10 comprising a heated substrate
  • a portion of the region is applied with a second color changing pattern 26, and another portion of the region is applied with a middle coating layer 24;
  • the second color changing pattern 26 and the first color changing pattern 30 change color in a reversible manner with changes in temperature.
  • the first color changing pattern 30 when the heating device is a pot, the first color changing pattern 30 may be formed as an oil amount scale line to have a function of indicating the amount of oil discharged. During heating, the first color changing pattern 30 is discolored when heated to a predetermined temperature, thereby alerting the user to drain the oil and indicating the amount of oil discharged.
  • the second color changing pattern 26 is disposed on the upper surface of the color layer 23, and presents a second color changing pattern by contrast with the color of the coloring layer 23.
  • the color of the second color changing pattern 26 and the coloring layer 23 are the same at normal temperature (for example, all are light red), and the appearance cannot be clearly recognized at this time.
  • a contour of the second color changing pattern when the heating device is heated to a predetermined temperature, the color of the second color changing pattern is changed from shallow to deep, and by contrast with the color of the color layer 23, a clear outline of the oil droplet is displayed, thereby prompting cooking Put oil on for cooking.
  • the heating device is a pot
  • the color of the color layer 23, the first color changing pattern 30 and the second color changing pattern are the same;
  • the temperature is raised to a suitable cooking temperature, that is, about 180 ° C
  • the color of the first color changing pattern 30 and the second color changing pattern is changed from deep to light or from shallow to deep, so that the color in the pot is changed from the overall single color pattern to the different color.
  • the pattern reminds the user that the oil can be used for cooking at this time, avoiding the problem that the temperature is too low or too high, resulting in poor cooking performance and large cooking fumes.
  • the temperature in the pot returns to the normal temperature, and the color of the first color changing pattern 30 and the second color changing pattern changes from shallow to deep or from deep to shallow, and returns to the color depth state before the temperature rise, that is, the first color changing pattern 30
  • the color of the second color change pattern 26 is reversibly changed with temperature.
  • the color change pattern is changed from a single color tone pattern to a pattern having a different color during cooking, so that the user can more clearly and timely determine that the temperature reaches a suitable requirement.
  • coated color layer 23 and the intermediate coating 24 can act as a protective layer that enhances protection of the heated body 10 (ie, the body substrate) from corrosion during use.
  • the innermost transparent coating layer 25 formed on the inner surface of the heating device can effectively protect the color layer 23, the first color changing pattern 30 and the second color changing pattern 26 from being lost during long-term use. effect.
  • the preparation process of the heating device according to the above preferred embodiment may include:
  • Step 1 first coating the entire inner surface of the body substrate (ie, the heating body 10) the primer layer 21;
  • Step 2 after applying a layer of coloring layer 23 on the entire area of the undercoat layer 21;
  • Step 3 then block the partial area of the upper surface of the color layer 23 with the covering, and apply the intermediate coating 24 in the unobstructed area;
  • Step 4 next coating the second color changing pattern 26 in the occlusion area of the color layer 23;
  • Step 5 then forming a first color changing pattern 30 in a local area of the upper surface of the intermediate coating 24;
  • Step 5 Finally, a clear topcoat 25 is applied to cover the entire surface.
  • the color changing layer includes a first color changing pattern and a second color changing pattern, the first color changing pattern is a color changing oil line and the second color changing pattern is also a color changing pattern described below.
  • a color changing oil line and a color changing pattern are formed on the inner surface of the heated substrate, and the color of the color changing oil line and the color changing pattern changes when the substrate is heated to a predetermined temperature, in which case the color changing oil line can indicate the oil discharge amount
  • the color changing pattern can be used to indicate that the heating device has reached a predetermined temperature. Therefore, as shown in FIG. 2, the heating device (such as a pan) according to the present invention includes:
  • the color change oil line is used to indicate a discharge amount, and the color change pattern is used to instruct the heating device to reach a predetermined temperature.
  • the position of the color change pattern and the color change oil line is not particularly limited.
  • the color changing pattern is located in the middle of the inner surface of the substrate of the heating body 10, and the color changing oil line is located on the outer circumference of the color changing pattern.
  • the color changing pattern and the color changing oil line may be directly formed on the inner surface of the base of the heating body 10, or other coating layers may be formed under the both, as long as the color changing pattern is visible in the middle in the appearance.
  • the color changing oil line is located on the outer circumference of the color changing pattern.
  • the inner surface of the base of the heating body 10 is further formed with a coloring layer 23.
  • the color layer 23 may be of a fixed color or may change color in a reversible manner as the temperature changes.
  • the color change pattern may be formed on the same surface as the color layer 23, or a color change pattern may be formed on the upper surface of the color layer 23.
  • the color changing pattern is formed on the upper surface of the color layer 23.
  • the color changing oil line, the color changing pattern, and the color layer 23 are the same color; at a predetermined temperature, the color of the color changing oil line and the color changing pattern and the lining The color of the color layer 23 is different.
  • predetermined temperature refers to a temperature suitable for a user to perform an operation with the heating device.
  • the "predetermined temperature” means that the cook is suitable for cooking.
  • the temperature may usually be 170 ° C or higher, preferably 175 ° C or higher, more preferably 175 to 200 ° C, and most preferably about 180 ° C.
  • the color-coded layer 23, the color-changing oil line, and the color-changing pattern are both light colors (such as light red) at normal temperature, and the temperature of the substrate of the heating body 10 rises. At a predetermined value, the color of the color changing oil line and the color changing pattern is changed from shallow to dark, so that the color of the color layer 23 is different from the color of the color changing oil line and the color changing pattern.
  • the color change oil line and the color change pattern may be reversible colors, and the color change oil line and the color change pattern change color as the temperature increases, when the body is heated When the temperature of the substrate of 10 is raised to a predetermined value, the color of the color changing oil line and the color changing pattern changes from light color to dark color, so that the inner surface of the heating device exhibits a pattern having a different color at a predetermined temperature.
  • the color changing pattern when the color changing pattern is formed into a pattern shape that has a warning or reminding effect on a certain operation of the user of the heating device, the color change of the color changing pattern can achieve a good temperature display effect.
  • the heating device is a cookware
  • the color changing pattern is preferably oil droplets in order to remind the cook to cook at a suitable temperature for cooking.
  • the color changing oil line can be made into an oil amount scale line, so that it has a function of indicating the amount of oil discharged.
  • the color changing oil line is discolored, thereby reminding the user to drain the oil and indicating the amount of oil discharged.
  • the varying oil line 30 can be formed into a conventional shape having a metering function, such as a plurality of concentric rings or sectors (such as a "Wifi" fan shape).
  • the color-imparting layer 23, the color-changing oil line, and the color-changing pattern may each be invertible colors, each of which may be composed of a chemical substance containing a color that changes color in a reversible manner with a change in temperature.
  • the coating material is formed.
  • the coating material A forming the color-coded layer 23 contains iron oxide, perylene red, and black pigment
  • the coating material B forming the color-changing pattern is the same as the coating material C forming the color-changing oil line.
  • each contains iron oxide and perylene.
  • the proportion of iron oxide contained in the coating material A is different from the ratio of the iron oxide contained in the coating material B and the coating material C.
  • the color changing pattern is closer to the base of the heating body 10 than the color changing oil line, and the temperature change is more sensitive. That is, the color-changing pattern and the color-changing oil line are not formed on the same surface, and the color-changing pattern is closer to the inner surface of the base of the heating body 10 than the color-changing oil line in the thickness direction.
  • a partial region of the upper surface of the color layer 23 is formed with a middle coating layer 24, the color changing oil line is formed on a partial region of the upper surface of the intermediate coating layer 24, and a color changing pattern is formed on the coloring layer. 23 Local area of the upper surface.
  • the intermediate coating layer 26 is generally a dark oil layer formed between the color changing oil line and the color-imparting layer 23 to increase wear resistance and strengthen the bonding force between the color-changing oil line and the color-imparting layer 23.
  • the heating device of the present invention when a color changing pattern is formed on the upper surface of the color layer 23, the intermediate coating layer 24 and the color changing pattern are juxtaposed on the same surface, and the intermediate coating layer 24 and the color changing pattern 2 Together, the entire upper surface of the color layer 23 is not completely covered, so that the heating device can see the color pattern of the color layer 23, the color changing oil line, and the color changing pattern in appearance.
  • the upper surface of the color changing pattern in order to enhance the abrasion resistance of the color changing pattern, is not higher than the upper surface of the intermediate coating 24. More preferably, the color changing pattern has a thickness smaller than the thickness of the intermediate coating layer 24.
  • the color changing pattern when a color changing pattern is formed on the upper surface of the color layer 23, the color changing pattern may be formed on any surface of the upper surface of the color layer 23 that is not covered by the intermediate coating layer 24. .
  • the color changing pattern is located in the middle of the base of the heating body 10, and the intermediate coating layer 24 is formed around the circumference of the color changing pattern.
  • the color change oil line formed on the upper surface of the intermediate coat layer 24 is also formed around the outer circumference of the color change pattern.
  • the heating means is such that the color pattern of the color-imparting layer 23 and the color-changing pattern is located in the middle of the inner surface of the heating device, and the color pattern of the color-changing oil line surrounds the outer periphery of the color-imparting layer 23 and the color-changing pattern.
  • the color of the color changing pattern the color pattern in which the temperature change is relatively sensitive
  • the heating device may further include an undercoat layer 21 formed under the color-coded layer 23.
  • the undercoat layer 21 covers the entire inner surface of the substrate of the heating body 10; the color layer 23 covers the entire upper surface of the undercoat layer 21; and the color changing pattern is formed on the color layer 23
  • the middle layer 24 is formed around the outer circumference of the color-changing pattern and is separated from the color-changing pattern (ie, not connected to each other); the color-changing oil line is formed in a partial region of the upper surface of the intermediate coating layer 24.
  • the heating device may further include a transparent top coat layer 25 formed on the innermost surface of the inner surface of the heating device.
  • the color pattern of the color-coded layer 23, the color-changing oil line, and the color-changing pattern can be seen through the transparent top coat layer 25.
  • the center of the base of the heating body 10 is convex upward, and the color changing pattern is located at the upper end surface of the convex portion.
  • the color-changing pattern since the color-changing pattern is at a high position, it protrudes slightly from the surface of the substrate, so that it is not easily covered by oil or sauce during cooking, and is more easily observed by the user.
  • the heating device is a wok
  • the base of the heating body 10 includes an outer layer of iron and an inner layer of aluminum
  • the color layer 23 and/or the discoloration A pattern is formed on the inner layer of aluminum and located in the middle of the wok.
  • the color change in the center of the wok is the easiest to observe, but when heating on the induction cooker, the induction coil of the induction cooker is wound (the induction cooker is not wound around the induction coil), so that it is opposite to the center of the wok.
  • the part of the induction coil is missing, and the temperature directly opposite to the induction coil is too high (this is also the reason why the base radius of the heating body is easily burned at 1/2), and the heat transfer efficiency of iron is very low.
  • the inner layer of aluminum can transfer the heat of the base of the heating body and the opposite part of the induction coil to the center of the base of the heating body, so that the color changing pattern can reflect the temperature of the base of the heating body more timely, accurately and truly.
  • the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery.
  • the outer layer of the outer layer of the iron has a hollow circular through hole, and the inner layer of the aluminum is pressed and protruded from the through hole, and a vertical projection of at least one of the through holes is located in the lining The color layer 23 and the area formed by the color changing pattern.
  • the contact area between the inner layer of aluminum and the outer layer of iron can be increased, and the heat of the outer layer of iron can be quickly transferred into the pot, so that the discoloration is more accurate and timely;
  • the wok when the wok is placed in the gas
  • the firepower of the center of the gas stove can be directly transmitted to the color changing material through the aluminum layer in the through hole opposite to the color changing area, thereby further improving the accuracy and timeliness of the discoloration of the wok.
  • each of the color-coded layer 23, the color-changing pattern, and the color-changing oil line may be formed by a method conventional in the art.
  • the color-coded layer 23 is formed by spraying, and the color-changing pattern and the color-changing oil line are each formed by printing.
  • the coloring layer 23 has a large area and is formed by spraying, and can be more uniformly coated on the substrate or the undercoat layer, and the color changing oil line and the color changing pattern have a small area, and the printing method is more efficient.
  • the heating device comprises:
  • a heating body 10 comprising a heated substrate
  • a part of the area is applied with a color-changing pattern, and another part of the area is applied with a medium coating layer 24;
  • the color-changing pattern, and the color-changing oil line at least the color-changing oil line and the color-changing pattern change color in a reversible manner with a change in temperature.
  • the color changing oil line when the heating device is a pot, may be formed as an oil amount scale line to have a function of indicating the amount of oil discharged. During the heating process, when heated to a predetermined temperature, the color changing oil line is discolored, thereby reminding the user to drain the oil and indicating the amount of oil discharged.
  • the color changing pattern is disposed on the upper surface of the color-coded layer 23, and a color-changing pattern is exhibited by comparison with the color of the color-coded layer 23.
  • the color changing pattern and the coloring layer 23 have the same color (for example, all light red) at normal temperature, and the outline of the color changing pattern cannot be clearly recognized in appearance at this time;
  • the heating device is heated to a predetermined temperature, the color of the color changing pattern is changed from shallow to deep, and by contrast with the color of the color-imparting layer 23, a clear outline of the oil droplet shape is exhibited, thereby prompting the cook to drain the oil for cooking.
  • the heater is a pot
  • the color of the color layer 23, the color changing oil line and the color changing pattern are the same;
  • the temperature rises to Suitable for cooking temperature that is, about 180 °C
  • the color of the color changing oil line and the color changing pattern is changed from deep to light or from shallow to deep, so that the color in the pot is changed from the overall single color pattern to the pattern with different colors, thereby reminding the user
  • the temperature in the pot returns to normal temperature, and the color of the color changing oil line and the color changing pattern changes from shallow to deep or from deep to shallow, and returns to the color depth before the temperature rises, that is, the color of the color changing oil line and the color changing pattern Temperature changes are reversible.
  • the color changing layer is changed from a single color tone pattern to a pattern having a different color during cooking, so that the user can more clearly and timely determine that the temperature reaches a suitable requirement.
  • coated color layer 23 and the intermediate coating 24 can act as a protective layer that enhances protection of the heated body 10 (ie, the body substrate) from corrosion during use.
  • the innermost layer of the clear top coat layer 25 formed on the inner surface of the heating device can effectively protect the color-imparting layer 23, the color-changing oil line, and the color-changing pattern so as not to fall off during long-term use and lose the effect.
  • the preparation process of the heating device according to the above preferred embodiment may include:
  • Step 1 first coating the entire inner surface of the body substrate (ie, the base of the heating body 10) the primer layer 21;
  • Step 2 after applying a layer of coloring layer 23 on the entire area of the undercoat layer 21;
  • Step 3 then block the partial area of the upper surface of the color layer 23 with the covering, and apply the intermediate coating 24 in the unobstructed area;
  • Step 4 next applying a color changing pattern to a portion of the occlusion region of the color layer 23;
  • Step 5 then forming a color changing oil line on a partial area of the upper surface of the intermediate coating layer 24;
  • Step 5 Finally, a clear topcoat 25 is applied to cover the entire surface.
  • the inner surface of the heating body 10 is formed with a groove, and the color changing layer may be disposed on the groove.
  • the color changing layer is formed in the groove, and is not subjected to wear and tear during long-term use, which greatly prolongs the service life of the color changing coating. Therefore, as shown in FIGS. 3A-3E, the heating device of the present invention includes a heating body 10 having a groove 13 formed on an inner surface thereof, and a color changing layer 20 formed on the groove 13
  • the color-changing layer 20 changes color in a reversible manner with changes in temperature.
  • the recess 13 can be opened in a manner conventional in the art.
  • the mouth width A of the groove 13 is not less than the bottom width B.
  • the groove 13 has a trapezoidal cross section.
  • the groove cross section means a vertical section along the width direction of the groove. Since a certain angle is formed between the human eye and the color changing layer 20 during cooking, it is easier to see the color changing layer 20 by making the side of the groove beveled.
  • the ratio between the mouth width A and the bottom width B of the groove 13 is 1.01 to 1.5:1.
  • the groove 13 may have a depth of 0.1 to 3 mm, preferably 0.2 to 2 mm. Opening the grooves in accordance with the above dimensions facilitates the application of coatings such as the color changing layer and the undercoat layer, so that the coatings are more firmly bonded to the heating body.
  • the upper surface of the color changing layer 20 is not higher than the inner surface of the heating body 10.
  • the overall shape of the groove 13 is not particularly limited.
  • the groove 13 is one or more annular shapes surrounding the center of the substrate of the heating body.
  • the color-changing layer formed in the groove 13 can avoid the heating dead zone of the center of the substrate of the heating body, so that the temperature of the substrate of the heating body can be more accurately and timely reacted;
  • the layer pattern can function to show the amount of fuel added, thereby avoiding the health or mouthfeel problems caused by excessive or too little addition.
  • the groove 13 may include a plurality of sub-grooves separated from each other, the plurality of sub-grooves being annularly distributed.
  • the sub-grooves are annularly distributed around the center of the base of the heating body.
  • the shape thereof is not particularly limited, and may be, for example, a regular geometric shape such as a circle, an arc, a square, or the like.
  • the color-changing layer 20 may be formed of a coating material containing a chemical substance that changes color in a reversible manner with changes in temperature.
  • the coating material forming the color-changing layer 20 may contain iron oxide and perylene.
  • the heating device may further include an undercoat layer 21 covering the inner surface of the heating body and the surface of the groove, in which the color changing layer 20 is formed on the undercoat layer 21 on.
  • the undercoat layer 21 is first applied on all the exposed surfaces inside the heating body (including the surface of the heating body itself and the bottom surface and the side surface of the groove), and then the color is coated in the groove 13 Layer 20.
  • the undercoat layer 21 is preferably black.
  • the undercoat layer 21 can function as a color lining, so that the user pays more attention to the change in color of the color changing layer 20.
  • the upper surface of the color changing layer 20 is lower than the upper surface of the undercoat layer on the inner surface of the heating body.
  • the material of the heating body 10 can be a conventional choice in the art, such as a non-magnetic or weakly magnetically permeable material conventional in the art.
  • the material of the heating body 1 is aluminum or an aluminum alloy.
  • the heating device includes:
  • Heating the body 10 the inner surface of the heating body 10 is formed with a groove 13 formed in a ring shape (one or more) surrounding the center of the base of the heating body;
  • a color changing layer 20 is formed on the undercoat layer 21.
  • the heating device comprises:
  • the inner surface of the heating body 10 is formed with a groove 13 including a plurality of sub-grooves separated from each other, the sub-grooves being annularly distributed (may be distributed in one or more rings), each sub- The groove is circular or curved;
  • a color changing layer 20 is formed on the undercoat layer 21.
  • the color changing layer 20 when it is a pot, the color changing layer 20 exhibits a dark color or a light color when the temperature of the heating device is initially at a normal temperature during the hot pot before cooking the food, when heated
  • a suitable cooking temperature that is, about 180 ° C
  • the color of the color changing layer 20 changes from deep to light or from shallow to deep, thereby reminding the user that the oil can be used for cooking at this time, avoiding the temperature being too low or too high.
  • a suitable cooking temperature that is, about 180 ° C
  • the temperature in the pot returns to normal temperature, and the color of the color changing layer 20 changes from shallow to deep or from deep to shallow, and returns to the state of color depth before the temperature rises, that is, the color of the color changing layer 20 is reversibly changed with temperature.
  • the heating device is a heating device suitable for electromagnetic heating, and a magnetic conductive layer is formed on an outer surface of the heating body. Therefore, as shown in FIGS. 4A-4C, the present invention is applicable to
  • the electromagnetic heating heater includes:
  • a magnetically permeable layer 12 formed on an outer surface of the heating body 10;
  • the color-changing layer 20 covers only a partial area of the inner surface of the heating body 10.
  • the distance R from the position where the color changing layer 20 is formed to the center of the base of the heating body is 20-70% of the radius of the base of the heating body, and specifically, for example, may be 20%, 25%, 30%, 35%, 40%, Any of the ranges of 45%, 50%, 55%, 60%, 65%, 70%, and any two of these point values.
  • the distance R from the position at which the color-changing layer 20 is formed to the center of the substrate of the heating body is 40-60%, and most preferably about 50%, of the radius of the substrate of the heating body.
  • the color changing layer corresponds to a region where the magnetic lines of force are stronger during electromagnetic heating, so that the color changing layer can react the heating body more accurately and in time.
  • the distance R from the formation position of the color-changing layer 20 to the center of the substrate of the heating body may be 25-100 mm, preferably 40-80 mm.
  • the pattern shape of the color-changing layer 20 is not particularly limited, and various regular geometric shapes or irregular shapes may be used.
  • the color changing layer 20 is an annular pattern surrounding the center of the substrate of the heating body.
  • the annular color-changing pattern layer corresponds to the annular heating interval in which the magnetic lines of force are strong, so that a better temperature-sensing effect can be achieved.
  • a circular color-changing pattern layer (such as a loop line) can function to show the amount of oil discharged.
  • the color-changing layer 20 comprises at least two color-changing pattern layers, for example 2-10 color-changing pattern layers.
  • the at least two color-changing pattern layers may be separated from each other or may be laminated to each other.
  • the at least two color-changing pattern layers are laminated to each other, and between the two color-changing pattern layers adjacent to each other, the upper color-changing pattern layer partially covers the color-changing pattern layer located below.
  • the color changing layer 20 includes at least two color changing pattern layers
  • the at least two color changing pattern layers are different in color at normal temperature
  • the colors are the same at a predetermined temperature
  • the at least two color changing pattern layers are The colors are the same at normal temperature
  • the colors are different at the predetermined temperature.
  • the predetermined temperature refers to a temperature at which the user can cook for cooking, and is usually 170 ° C or higher, preferably 175 ° C or higher, more preferably 175 to 200 ° C, and most preferably about 180 ° C.
  • the color changing layer is configured in the above manner, so that when the heating device is heated to a predetermined temperature, the pattern on the inner surface of the heating device changes from a plurality of colors to a single color or a single color to a plurality of colors, and the user can clearly observe through the vision. To the color change, to remind the user that oil can be used for cooking at this time, achieving a better temperature display effect.
  • the color-changing layer 20 may be formed of a coating material containing a chemical substance that changes color in a reversible manner with changes in temperature.
  • the coating material forming the color-changing layer 20 may contain iron oxide and perylene.
  • the heating device may further include an undercoat layer 21 formed on an inner surface of the heating body 10, the color changing layer 20 being formed on an upper surface of the undercoat layer 21.
  • the undercoat layer 21 covers the entire inner surface of the heating body 10.
  • the magnetic conductive layer 12 may cover a partial area of the outer surface of the heating body or may cover the entire outer surface of the heating body.
  • the magnetically permeable layer 12 covers the base portion of the heated body that heats the outer surface of the body.
  • the magnetically permeable layer 12 may be formed of a magnetic material conventional in the art.
  • the magnetically permeable layer 12 is formed of a magnetic iron alloy.
  • the magnetic iron alloy may be at least one of an Fe-C alloy, an Fe-Si alloy, and an Fe-Mn alloy.
  • the material of the heating body 10 can be a conventional choice in the art, such as a non-magnetic or weakly magnetically permeable material conventional in the art.
  • the material of the heating body 1 is aluminum or an aluminum alloy.
  • the heating device includes:
  • a magnetically permeable layer 12 formed on an outer surface of the heating body 10, the magnetically permeable layer 12 covering the entire outer surface;
  • the color changing layer 20 is formed on the inner surface of the heating body 10, and the color changing layer 20 covers a partial area of the inner surface of the heating body 10.
  • the color changing layer 20 is a ring centered on the center of the base of the heating body, and the color changing layer 20
  • the distance R to the center of the base of the heating body is 20-70%, preferably 40-60, more preferably about 50% of the base radius of the heating body.
  • the heating device includes:
  • a magnetically permeable layer 12 formed on an outer surface of the heating body 10, the magnetically permeable layer 12 covering a base portion of the heating body that heats the outer surface of the body;
  • the color changing layer 20 is formed on the inner surface of the heating body 10, and the color changing layer 20 covers a partial area of the inner surface of the heating body 10.
  • the color changing layer 20 is a ring centered on the center of the base of the heating body, and the color changing layer 20
  • the distance R to the center of the base of the heating body is 20-70%, preferably 40-60, more preferably about 50% of the base radius of the heating body;
  • the color-changing layer 20 includes two color-changing pattern layers stacked on each other (ie, a first color changing pattern layer and a second color changing pattern layer), the second color changing pattern layer partially covering the upper surface of the first color changing pattern layer;
  • first color changing pattern layer and the second color changing pattern layer are different in color at normal temperature, and the colors are the same at a predetermined temperature; or the first color changing pattern layer and the second color changing pattern layer have the same color at normal temperature, and the color is at a predetermined temperature. Different.
  • the heating device includes:
  • a magnetically permeable layer 12 formed on an outer surface of the heating body 10, the magnetically permeable layer 12 covering a base portion of the heating body that heats the outer surface of the body;
  • the color changing layer 20 is formed on the inner surface of the heating body 10, and the color changing layer 20 covers a partial area of the inner surface of the heating body 10.
  • the color changing layer 20 is a ring centered on the center of the base of the heating body, and the color changing layer 20
  • the distance R to the center of the base of the heating body is 20-70%, preferably 40-60, more preferably about 50% of the base radius of the heating body.
  • the color changing layer 20 exhibits a dark color or a light color when the temperature of the heating device is initially at a normal temperature during the hot pot before cooking the food, when heated
  • a suitable cooking temperature that is, about 180 ° C
  • the color of the color changing layer 20 changes from deep to light or from shallow to deep, thereby reminding the user that the oil can be used for cooking at this time, avoiding the temperature being too low or too high.
  • the temperature in the pot returns to normal temperature, and the color of the color changing layer 20 changes from shallow to deep or from deep to shallow, and returns to the state of color depth before the temperature rises, that is, the color of the color changing layer 20 changes reversibly with temperature.

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Abstract

一种加热器具，该加热器具包括：加热主体（10）；以及形成在所述加热主体（10）内表面上的变色层（20），其中，所述变色层（20）呈长条的线状，且所述变色层（20）以可逆的方式随温度的变化而改变颜色。所述的加热器具中变色层（20）的设置可以起到示温的作用以提醒使用者开始使用(放油烹饪)并同时能够方便使用者确定放料量(特别是油量)。在另一种实施方式中，所述加热器具为用于电磁加热的器具，此时所述变色层（20）形成在基底中心附近，避开了加热盲区(即基底中心)，从而能够更加及时地反应出基底温度变化。

Description

加热器具 技术领域
本发明涉及家用电器领域，具体涉及一种加热器具。
背景技术
在烹饪食物之前的热锅期间，因使用者对温度判断不准，无法确定放油进行烹饪的时间点，如果温度过低，烹饪效果不佳，如果温度过高放油进行烹饪，锅内会产生很大的油烟，不利于身体健康，且增加了厨房的清洁难度。另一方面在使用者开始放油的时候也无法判断该放多少油，放入过多的油会使使用者摄入过多的油脂，不利于健康。
现有的解决方案是在锅底表面印刷变色油墨，当锅底温度上升到180℃左右时，通过油墨颜色变化提醒使用者可以放油烹饪，但变色油墨通常印刷在锅底正中心，恰好是明火和电磁炉加热的盲区，导致变色会有延迟，而且无法有效提醒使用者该放入多少油。
发明内容
本发明的目的是为了克服现有的示温锅存在的由于变色层变色延迟从而导致不能及时示温的缺陷，提供一种能够及时示温的加热器具。
为了实现上述目的，本发明提供了一种加热器具，该加热器具包括：
加热主体；以及
形成在所述加热主体内表面上的变色层，其中，所述变色层呈长条的线状，且所述变色层以可逆的方式随温度的变化而改变颜色。
优选地，所述加热器具还包括依次形成在所述加热主体的基底的内表面上的衬色层和中涂层，所述中涂层形成于所述衬色层上表面的局部区域，所述变色层形成于所述中涂层上表面的局部区域。
优选地，所述加热主体的内表面上形成有凹槽，且所述变色层设置于凹槽上。
优选地，所述变色层的形成位置到加热主体的基底中心的距离为加热主体的基底半径的20-70％，更优选为40-60％。
优选地，所述变色层为环绕加热主体的基底中心的环形图案。
优选地，所述变色层包括至少两个变色图案层。
优选地，所述至少两个变色图案层相互层叠，且在上下相邻的两个变色图案层之间，位于上方的变色图案层部分覆盖位于下方的变色图案层。
优选地，所述至少两个变色图案层在常温下颜色相异，在预定温度下颜色相同，或者
所述至少两个变色图案层在常温下颜色相同，在预定温度下颜色相异。
优选地，所述加热器具还包括依次形成在所述加热主体的基底的内表面上的衬色层和中涂层，所述变色层包括第一变色图案和第二变色图案，所述中涂层形成于所述衬色层上表面的局部区域，所述第一变色图案形成于所述中涂层上表面的局部区域，所述 第二变色图案形成于所述衬色层上表面的局部区域。
优选地，所述第二变色图案的上表面不高于所述中涂层的上表面。
优选地，所述第二变色图案位于所述加热主体的基底的中部。
优选地，所述第一变色图案围绕所述第二变色图案的外周形成。
优选地，在常温下，所述第一变色图案、所述第二变色图案和所述衬色层的颜色相同；在预定温度下，所述第一变色图案和所述第二变色图案的颜色与所述衬色层的颜色相异。
优选地，所述第二变色图案为油滴状。
优选地，所述第一变色图案为多个同心环形或扇形。
优选地，所述加热主体内表面上还形成有底涂层，所述底涂层直接覆盖加热主体的整个内表面，且变色层形成在所述底涂层的上表面上。
优选地，所述变色层与所述底涂层呈现出不同的颜色。
优选地，所述加热器具还包括形成在所述加热主体外表面上的导磁层。
优选地，还包括形成于所述加热器具内表面的最内层的透明面涂层。
优选地，所述加热器具为炒锅，所述加热主体包括铁外层和铝内层，所述变色层形成在所述铝内层上。
优选地，所述铝内层为中心厚且从中心向外周逐渐变薄的结构。
优选地，所述铁外层底部具有镂空的圆形通孔，所述铝内层受到挤压凸出于所述通孔内，至少有一个所述通孔的垂直投影位于所述变色层构成的区域内。
优选地，形成所述变色层的涂层材料含有氧化铁和二萘嵌苯红。
优选地，所述变色层通过印刷方式形成。
本发明还提供了一种适用于电磁加热的加热器具，该加热器具包括：
加热主体；
形成在所述加热主体外表面上的导磁层；以及
形成于所述加热主体内表面上的变色层，且所述变色层的形成位置位于加热主体的基底中心的附近；
其中，所述变色层以可逆的方式随温度的变化而改变颜色。
优选地，所述变色层的形成位置到加热主体的基底中心的距离为加热主体的基底半径的20-70％，更优选40-60％。
在本发明所述的加热器具中变色层的设置可以起到示温的作用以提醒使用者开始使用(放油烹饪)并同时能够方便使用者确定放料量(特别是油量)。在另一种实施方式中，所述加热器具为用于电磁加热的器具，此时所述变色层形成在基底中心附近，避开了加热盲区(即基底中心)，从而能够更加及时地反应出基底温度变化。
附图说明
图1A是根据本发明的一种实施方式的加热器具的结构示意图；
图1B是根据本发明的另一种实施方式的加热器具的结构示意图；
图1C是根据本发明的一种优选实施方式的加热器具的外观示意图；
图2是根据本发明的一种优选实施方式的加热器具的结构示意图；
图3A是本发明所述的加热器具的结构示意图；
图3B是本发明所述的加热器具中加热主体的结构示意图；
图3C是本发明所述的加热器具的一种实施方式的外观示意图；
图3D是本发明所述的加热器具的另一种实施方式的外观示意图；
图3E是本发明所述的加热器具的另一种实施方式的外观示意图；
图4A是根据本发明的一种实施方式的加热器具的结构示意图；
图4B是根据本发明的另一种实施方式的加热器具的结构示意图；
图4C是根据本发明的另一种实施方式的加热器具的结构示意图。
附图标记说明
10   加热主体                   13   凹槽
12   导磁层                     21   底涂层
20   变色层                     25   透明面涂层
23   衬色层                     24   中涂层
26   第二变色图案(或变色图案)
30   第一变色图案(或变色油线)
具体实施方式
以下结合附图对本发明的具体实施方式进行详细说明。应当理解的是，此处所描述的具体实施方式仅用于说明和解释本发明，并不用于限制本发明。
在本发明中，在未作相反说明的情况下，使用的方位词如“上、下”通常是指参考附图所示的上、下；“内、外”是指相对于各部件本身的轮廓的内、外。
在第一方面中，如图1A-C所示，本发明所述的加热器具包括：
加热主体10；以及
形成在所述加热主体10内表面上的变色层20(所述变色层20呈长条的线状从而能够起到度量的作用)；
其中，所述变色层20以可逆的方式随温度的变化而改变颜色。
在本发明所述的加热器具中，优选地，所述变色层20的形成位置不在加热主体的基底中心，而是在加热主体的基底中心的附近，避开了加热器具在常规加热(如燃气灶、电磁炉等)时加热主体的基底中心的加热盲区，而加热主体的基底中心附近的位置才是加热的最大能量位置，因而，通过在加热主体的基底中心的附近形成变色层能够更加及时地反应出加热主体的基底温度的变化。在优选情况下，所述变色层20与加热主体的基底中心的最小距离为25-30毫米。
在本发明所述的加热器具中，所述变色层20的形状没有特别的限定，各种常规的几何形状或不规则形状均可。在优选情况下，所述变色层20为环绕加热主体的基底中 心的环形线(如图1C所示)或者以加热主体的基底中心为圆心的扇形(如“Wifi”的扇形)。
在本发明所述的加热器具中，优选地，所述加热器具的内腔为下凹的结构，且加热主体的基底中心为下凹的最低点。在这种情况下，加入加热器具中的油都往加热主体的基底中心聚集，可以更好更准确地测量出油量的多少。
在本发明所述的加热器具中，所述变色层20可以为单个图案层，也可以为多个图案层。在优选情况下，所述变色层20为2-10个(更优选为2-5个)相互分离的变色图案。
当所述变色层20为多个图案层时，这些图案层可以形成在同一个面上，也可以形成在不同的面上。如图1A所示，多个变色图案层(即变色层)均形成在底涂层21的上表面上。当多个变色图案层(即变色层)形成不同的面上时，在一种实施方式中，如图1B所示，部分变色图案层形成直接形成在底涂层21的上表面上，再覆盖透明面涂层25，然后再形成其他的变色图案层。
当所述变色层20为多个图案层时，多个变色图案层(即变色层)可以具有相同的变色效果，或者至少有两个变色图案具有不同的变色效果。在一种实施方式中，多个变色图案层在常温下具有相同的颜色，当加热主体的基底加热至预定温度(如170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右)时，这些变色图案层颜色发生变化，同时由浅变深或者由深变浅。在另一种实施方式中，多个变色图案层在常温下具有相同的颜色，当加热主体的基底加热至预定温度(如170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右)时，这些变色图案层的颜色发生变化，由浅变深或者由深变浅，并且最终所有变色图案层的颜色变为相同的颜色。
根据本发明的一种优选实施方式，所述变色层20形成为油量刻度线(如多个同心环或者多个同心扇形)。在这种情况下，所述变色层20不仅可以起到示温的作用以提醒使用者开始放油烹饪，而且还可以显示放油量。
在本发明中，所述加热器具还可以包括底涂层21。在一种实施方式中，所述底涂层21直接覆盖加热主体10的整个内表面，且变色层20形成在所述底涂层21的上表面上。
在优选情况下，所述变色层20与所述底涂层21呈现出不同的颜色，具体地，在常温下变色层20和底涂层21的颜色不同，并且在预定温度(如170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右)下变色层20和底涂层21的颜色也不同。
在优选情况下，所述底涂层21优选为黑色。在这种情况下，所述底涂层21可以充当衬色的作用，使得使用者更加关注变色层20颜色的变化。
在本发明中，所述底涂层21可以由本领域常规的深色底油形成，所述深色底油例如可以含有聚四氟乙烯和黑色颜料。
在本发明中，所述加热器具还可以包括透明面涂层25。在一种实施方式中，所述变色层20包括多个相互分离的变色图案，且通过所述透明面涂层25将这些变色图案分成两部分，一部分位于透明面涂层25的上表面上，另一部分位于底涂层21和透明面涂 层25之间。在另一种实施方式中，所述透明面涂层25形成于所述加热器具内表面的最内层，也即透明面涂层25完全覆盖底涂层21和变色层20。
在本发明中，所述透明面涂层25可以由本领域常规的耐热、透明材料形成，例如可以由聚四氟乙烯形成。
在本发明中，所述变色层20可以由含有以可逆的方式随温度的变化而改变颜色的化学物质的涂层材料形成。例如，形成所述变色层20的涂层材料含有氧化铁和二萘嵌苯红。
在一种实施方式中，所述加热器具为炒锅，所述加热主体10包括铁外层和铝内层，所述变色层20形成在所述铝内层上。通过这样设计加热主体结构，使得变色层20能更加及时、准确、真实地反映出加热主体的基底的温度。
在优选情况下，所述铝内层为中心厚且从中心向外周逐渐变薄的结构。通过这样的设计，使得热量尽量往锅中心转递，进一步地提高炒锅变色的准确性和及时性。
在优选情况下，所述铁外层底部具有镂空的圆形通孔，所述铝内层受到挤压凸出于所述通孔内，至少有一个所述通孔的垂直投影位于所述变色层20构成的区域内。通过这样的设计，一方面可以增加铝内层与铁外层的接触面积，把铁外层的热量迅速地往锅内传递，使得变色更加准确和及时；另一方面当把炒锅放在煤气灶上加热的时候，煤气灶中心的火力可以通过与变色区域相对的通孔内的铝层直接传递给变色材料，从而进一步地提高炒锅变色的准确性和及时性。
在本发明中，所述变色层20可以通过本领域常规的方法形成。在优选情况下，所述变色层20通过印刷方式形成。
根据本发明的一种具体实施方式，如图1A和1C所示，所述加热器具包括：
加热主体10；
形成在所述加热主体10的内表面上的底涂层21，底涂层21覆盖整个加热主体内表面；
形成在所述底涂层21的上表面的局部区域上的变色层20，变色层20包括多个变色图案层，这些变色图案层为围绕加热主体的基底中心的同心环形，这些变色图案层以可逆的方式随温度的变化而改变颜色；以及
完全覆盖底涂层21和变色层20的透明面涂层25。
根据上述实施方式的加热器具，当其为锅具时，在烹饪食物之前的热锅期间，加热器具温度由常温升高到适合烹饪温度，即180℃左右时，变色层20的颜色由浅变深或者由深变浅，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题；而且变色层20中不同的环线可以起到显示放油量的作用。在烹饪完成后，加热主体的基底温度恢复至常温，变色层20恢复到温度升高前的颜色状态，即变色层20的颜色随温度变化是可逆变化。
而且，在上述实施方式所述的加热器具中，变色层20形成于透明面涂层25之下，这样可以有效保护变色层20，使其不会在长久使用过程中脱落而丧失效果。
根据本发明的另一种具体实施方式，如图1B和1C所示，所述加热器具包括：
加热主体10；
形成在所述加热主体10的内表面上的底涂层21，底涂层21覆盖整个加热主体内表面；
形成在所述底涂层21的上表面的局部区域上的第一变色图案层，所述第一变色图案层为围绕加热主体的基底中心的环形；
完全覆盖底涂层21和第一变色图案层的透明面涂层25；以及
形成在透明面涂层25的上表面的局部区域上的第二变色图案层，所述第二变色图案层为围绕加热主体的基底中心的环形，且在外观上第一变色图案层与第二变色图案层为同心环形，而且二者均以可逆的方式随温度的变化而改变颜色。
根据上述实施方式的加热器具，当其为锅具时，在烹饪食物之前的热锅期间，加热器具温度由常温升高到适合烹饪温度，即180℃左右时，第一变色图案层与第二变色图案层的颜色由浅变深或者由深变浅，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题；而且第一变色图案层和第二变色图案层形成的不同环线可以起到显示放油量的作用。在烹饪完成后，加热主体的基底温度恢复至常温，变色层20恢复到温度升高前的颜色状态，即变色层20的颜色随温度变化是可逆变化。
在第二方面中，所述加热主体10的基底内表面还可以依次形成有衬色层和中涂层，所述中涂层形成于所述衬色层上表面的局部区域，且所述变色层设置于中涂层上表面的局部区域。在被加热的基底的内表面上形成衬色层和可逆的变色层，通过调整衬色层和可逆变色层的颜色，可以实现使加热器具内表面上的图案由多种颜色变成单种颜色或者单种颜色变成多种颜色，使用者或烹饪者通过视觉可以明显观察到颜色变化，从而提醒使用者此时可以进行相应的操作如放油进行烹饪，达到了较好的示温效果。因此，如图2所示，本发明所述的加热器具包括：
包括被加热的基底的加热主体10；
形成在所述加热主体10的基底的内表面上的衬色层23、第一变色图案30和中涂层24，所述中涂层24形成于所述衬色层23上表面的局部区域，所述第一变色图案30形成于所述中涂层24上表面的局部区域，所述第一变色图案30以可逆的方式随温度的变化而改变颜色。
在所述加热器具中，中涂层26一般为深色油层，其形成于第一变色图案30和衬色层23之间，可以增加耐磨性，加强第一变色图案30与衬色层23之间的结合力。
在优选情况下，所述加热器具还包括形成于所述衬色层23上表面的局部区域上的第二变色图案，所述第二变色图案以可逆的方式随温度的变化而改变颜色。所述第二变色图案直接形成在衬色层23上，比第一变色图案30更靠近被加热的加热主体10的基底，温度变化更灵敏。
当所述衬色层23上表面还形成有第二变色图案时，中涂层24和第二变色图案并列形成在同一个面上，并且中涂层24和第二变色图案二者一起不完全覆盖衬色层23的 整个上表面，使得所述加热器具在外观上可以看到衬色层23、第一变色图案30和第二变色图案的颜色图案。在优选情况下，为了增强第二变色图案的耐磨损性能，所述第二变色图案的上表面不高于所述中涂层24的上表面。更优选地，所述第二变色图案的厚度小于所述中涂层24的厚度。
当所述衬色层23上表面还形成有第二变色图案时，所述第二变色图案可以形成于衬色层23上表面上未被中涂层24覆盖的任何区域。在优选情况下，所述第二变色图案位于所述加热主体10的基底的中部，中涂层24围绕第二变色图案的四周形成。进一步优选地，形成于中涂层24上表面上的第一变色图案30也围绕第二变色图案的外周形成。使得所述加热器具在外观上可以看到衬色层23和第二变色图案的颜色图案位于加热器具内表面的中部，而第一变色图案30的颜色图案围绕在衬色层23和第二变色图案的外周。在这种情况下，当第二变色图案(温度变化相对比较灵敏的颜色图案)的颜色发生变化时，可以更容易被使用者察觉。
在优选情况下，在常温下，所述第一变色图案30、所述第二变色图案和所述衬色层23的颜色相同；在预定温度下，所述第一变色图案30和所述第二变色图案的颜色与所述衬色层23的颜色相异。
在本文中，“预定温度”是指适合使用者用所述加热器具进行某项操作的温度，例如，当所述加热器具为锅具时，“预定温度”是指适合烹饪者加油进行炒菜的温度，通常可以为170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右。
在本文中，“颜色相同”并非单指颜色完全一致，实际使用过程中允许颜色有差异但人的肉眼难以分辨的情况。
在一种优选实施方式中，所述衬色层23、所述第一变色图案30和所述第二变色图案在常温下均为浅色(如浅红色)，当所述加热主体10的基底的温度升高至预定值时，所述第一变色图案30和所述第二变色图案的颜色由浅变深，使得所述衬色层23与所述第一变色图案30和所述第二变色图案的颜色相异。在这种情况下，可以仅仅所述第一变色图案30和所述第二变色图案是可逆变色的，所述第一变色图案30和所述第二变色图案随着温度的升高，其颜色发生变化，当加热主体10的基底的温度升高至预定值时，所述第一变色图案30和所述第二变色图案的颜色由浅色变成深色，使得所述加热器具的内表面在预定温度下显示出具有不同颜色的图案。
特别是，当所述第二变色图案形成为对加热器具的使用者进行某项操作具有警示或提醒作用的图案形状时，所述第二变色图案的颜色变化可以达到很好的示温效果。在一种实施方式中，当所述加热器具为锅具时，为了实现提醒烹饪者在适当的温度下加油进行炒菜，所述第二变色图案优选为油滴状。
当所述加热器具为锅具时，所述第一变色图案30可以做成油量刻度线，使其具有指示放油量的功能。在加热过程中，当加热至预定温度时，该所述第一变色图案30变色，从而提醒用户放油和指示放油量。所述第一变化图案30可以形成为具有计量功能的常规形状，如多个同心环形或扇形(如“Wifi”的扇形)。
在本发明中，所述衬色层23、所述第一变色图案30和所述第二变色图案各自可以 为可逆变色的，它们各自可以由含有以可逆的方式随温度的变化而改变颜色的化学物质的涂层材料形成。例如，形成所述衬色层23的涂层材料A含有氧化铁、二萘嵌苯红和黑色颜料，形成所述第二变色图案的涂层材料B和形成所述第一变色图案30的涂层材料C相同或不同，且各自含有氧化铁和二萘嵌苯红。在优选情况下，所述涂层材料A中包含的氧化铁的比例与所述涂层材料B和所述涂层材料C中包含的氧化铁的比例不同。
如前所述，在本发明中，所述加热器具还可以包括形成于所述衬色层23下方的底涂层21。在这种情况下，所述底涂层21覆盖在加热主体10的基底的整个内表面上；衬色层23覆盖在底涂层21的整个上表面上；第二变色图案形成于衬色层23的中部；中涂层24围绕第二变色图案的外周形成，并且与第二变色图案分离(即相互之间不连接)；第一变色图案30形成在中涂层24上表面的局部区域。
如前所述，在本发明中，所述加热器具还可以包括形成于所述加热器具内表面的最内层的透明面涂层25。通过透明面涂层25可以看到衬色层23、第一变色图案30和第二变色图案的颜色图案。
在本发明中，所述中涂层24可以由本领域常规的深色中油形成，所述深色中油例如可以含有聚四氟乙烯和黑色颜料。
在所述加热器具中，在一种实施方式中，所述第二变色图案被构造成文字或者图案，所述衬色层23的总面积大于所述第二变色图案的总面积，所述衬色层23的颜色变化的幅度小于所述第二变色图案。通过这样的设计，当加热到预设温度时，会使得第二变色图案与衬色层23融合，产生第二变色图案消失的效果，从而提醒人们放油的时间。
在所述加热器具中，在一种实施方式中，所述加热主体10的基底的中心向上凸起，所述第二变色图案位于凸起部位的上端面。在这种情况下，由于第二变色图案处于高位，微微地凸出于基底表面，这样不容易被炒菜时的油或酱所掩盖，会更容易地被使用者所观察到。
在所述加热器具中，在一种实施方式中，所述加热器具为炒锅，所述加热主体10的基底包括铁外层和铝内层，所述衬色层23和/或所述第二变色图案形成在所述铝内层上且位于所述炒锅的中部。在炒锅的中心部位变色是最容易被观察到的，但是在电磁炉上加热的时候，由于电磁炉感应线圈绕线的原因(电磁炉中心并没绕有感应线圈)，这样就使得与炒锅中心相对的部位感应线圈缺失，而与感应线圈直接相对的部位温度却过高(这也是为什么加热主体的基底半径1/2处容易烧焦的原因)，铁的热传递效率是很低的，通过增设铝内层，可以把加热主体的基底与感应加线圈相对部位的热量传递到加热主体的基底中心，使得变色图案能更加及时、准确、真实地反映出加热主体的基底的温度。
在优选情况下，所述铝内层为中心厚且从中心向外周逐渐变薄的结构。通过这样的设计，使得热量尽量往锅中心转递，进一步地提高炒锅变色的准确性和及时性。
在优选情况下，所述铁外层底部具有镂空的圆形通孔，所述铝内层受到挤压凸出于所述通孔内，至少有一个所述通孔的垂直投影位于所述衬色层23和所述第二变色图 案构成的区域内。通过这样的设计，一方面可以增加铝内层与铁外层的接触面积，把铁外层的热量迅速地往锅内传递，使得变色更加准确和及时；另一方面当把炒锅放在煤气灶上加热的时候，煤气灶中心的火力可以通过与变色区域相对的通孔内的铝层直接传递给变色材料，从而进一步地提高炒锅变色的准确性和及时性。
在本发明中，所述衬色层23、所述第二变色图案和所述第一变色图案30各自可以通过本领域常规的方法形成。在优选情况下，所述衬色层23通过喷涂的方式形成，所述第二变色图案和所述第一变色图案30各自通过印刷方式形成。衬色层23的面积较大，通过喷涂的方式形成，可以更加均匀的涂覆在基底或底涂层上，第一变色图案30和第二变色图案面积较小，通过印刷方式，效率更高。
根据本发明的一种优选实施方式，如图2所示，所述加热器具包括：
包括被加热的基底的加热主体10；
施加在所述加热主体10的基底的内表面上的底涂层21；
施加在所述底涂层21的上表面上的衬色层23；
在衬色层23的上表面上，一部分区域施加有第二变色图案26，另一部分区域施加有中涂层24；
施加在所述中涂层24上表面的局部区域的第一变色图案30；以及
覆盖所述衬色层23、所述第二变色图案26、所述第一变色图案30和所述中涂层24的透明面涂层25；
其中，在衬色层23、第二变色图案26和第一变色图案30三者中，至少所述第一变色图案30和所述第二变色图案26以可逆的方式随温度的变化而改变颜色。
在该实施方式中，当所述加热器具为锅具时，所述第一变色图案30可以做成油量刻度线，使其具有指示放油量的功能。在加热过程中，当加热至预定温度时，该第一变色图案30变色，从而提醒用户放油和指示放油量。
在该实施方式中，所述第二变色图案26设置在所述衬色层23的上表面上，通过与衬色层23的颜色之间的对比来呈现第二变色图案。例如，当所述第二变色图案26的形状为油滴状，在常温下，第二变色图案26与衬色层23的颜色相同(如均为浅红色)，此时在外观上不能清晰辨认出第二变色图案的轮廓；当加热器具加热至预定温度时，第二变色图案的颜色由浅变深，通过与衬色层23的颜色形成对比，显现出油滴状的清晰轮廓，从而提示烹饪者放油进行烹饪。
当所述加热器具为锅具时，在烹饪食物之前的热锅期间，当加热器具温度刚开始处于常温状态时，衬色层23、第一变色图案30和第二变色图案的颜色相同；当温度升高到适合烹饪温度，即180℃左右时，第一变色图案30和第二变色图案的颜色由深变浅或由浅变深，使得锅内颜色由整体单一色调图案变成有不同颜色的图案，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题。在烹饪完成后，锅内温度恢复至常温，第一变色图案30和第二变色图案的颜色由浅变深或由深变浅，恢复到温度升高前的颜色深浅状态，即第一变色图案30和第二变色图案26的颜色随温度变化是可逆变化的。
而且，在上述优选实施方式所述的加热器具中，在烹饪过程中变色图案由单一色调图案变成有不同颜色的图案，可以让使用者更加清楚及时的判断出温度达到合适要求。
另外，涂覆的衬色层23和中涂层24可以充当保护层，加强保护加热主体10(即锅身基材)不会在使用中被腐蚀。
此外，形成在加热器具内表面的最内层的透明面涂层25可以有效保护衬色层23、第一变色图案30和第二变色图案26，使其不会在长久使用过程中脱落而丧失效果。
在优选情况下，上述优选实施方式所述的加热器具的制备过程可以包括：
步骤1、先在锅身基材(即加热主体10)的整个内表面上涂覆底涂层21；
步骤2、之后在底涂层21的全部区域涂覆一层衬色层23；
步骤3、然后用遮挡物挡住衬色层23上表面的局部区域，在未遮挡的区域涂覆中涂层24；
步骤4、接下来在衬色层23的遮挡区域的局部涂覆第二变色图案26；
步骤5、接着在中涂层24上表面的局部区域形成第一变色图案30；
步骤5、最后涂覆透明面涂层25覆盖整体表面。
在第三方面中，所述变色层包括第一变色图案和第二变色图案，所述第一变色图案为变色油线且所述第二变色图案也即下述的变色图案。在被加热的基底的内表面上形成变色油线和变色图案，当基底加热到预定温度时，变色油线和变色图案的颜色发生变化，在这种情况下，变色油线能够指示放油量，变色图案可以用于指示加热器具达到了预定的温度。因此，如图2所示，本发明所述的加热器具(如锅具)包括：
包括被加热的基底的加热主体10；以及
形成在所述加热主体10的基底的内表面上的变色油线和变色图案，所述变色油线和所述变色图案以可逆的方式随温度的变化而改变颜色。
在本发明所述的加热器具中，所述变色油线用于指示放油量，所述变色图案用于指示加热器具达到了预定的温度。所述变色图案和所述变色油线的设置位置没有特别的限定。在优选情况下，所述变色图案位于所述加热主体10的基底内表面的中部，所述变色油线位于所述变色图案的外周。所述变色图案和所述变色油线可以直接形成在加热主体10的基底的内表面上，也可以在二者的下方形成其他的涂层，只要保证在外观上可以看到变色图案位于中部，变色油线位于变色图案的外周即可。
如前所述，在一种优选实施方式中，所述加热主体10的基底的内表面上还形成有衬色层23。所述衬色层23可以是固定颜色的，也可以是以可逆的方式随温度的变化而改变颜色的。所述变色图案可以与衬色层23形成在同一个面上，也可以使变色图案形成在所述衬色层23的上表面上。优选地，所述变色图案形成在所述衬色层23的上表面上。
进一步优选地，在常温下，所述变色油线、所述变色图案和所述衬色层23的颜色相同；在预定温度下，所述变色油线和所述变色图案的颜色与所述衬色层23的颜色相异。
在本文中，“预定温度”是指适合使用者用所述加热器具进行某项操作的温度，例如，当所述加热器具为锅具时，“预定温度”是指适合烹饪者加油进行炒菜的温度，通常可以为170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右。
在一种优选实施方式中，所述衬色层23、所述变色油线和所述变色图案在常温下均为浅色(如浅红色)，当所述加热主体10的基底的温度升高至预定值时，所述变色油线和所述变色图案的颜色由浅变深，使得所述衬色层23与所述变色油线和所述变色图案的颜色相异。在这种情况下，可以仅仅所述变色油线和所述变色图案是可逆变色的，所述变色油线和所述变色图案随着温度的升高，其颜色发生变化，当加热主体10的基底的温度升高至预定值时，所述变色油线和所述变色图案的颜色由浅色变成深色，使得所述加热器具的内表面在预定温度下显示出具有不同颜色的图案。
特别是，当所述变色图案形成为对加热器具的使用者进行某项操作具有警示或提醒作用的图案形状时，所述变色图案的颜色变化可以达到很好的示温效果。在一种实施方式中，当所述加热器具为锅具时，为了实现提醒烹饪者在适当的温度下加油进行炒菜，所述变色图案优选为油滴状。
当所述加热器具为锅具时，所述变色油线可以做成油量刻度线，使其具有指示放油量的功能。在加热过程中，当加热至预定温度时，该所述变色油线变色，从而提醒用户放油和指示放油量。所述变化油线30可以形成为具有计量功能的常规形状，如多个同心环形或扇形(如“Wifi”的扇形)。
在本发明中，所述衬色层23、所述变色油线和所述变色图案各自可以为可逆变色的，它们各自可以由含有以可逆的方式随温度的变化而改变颜色的化学物质的涂层材料形成。例如，形成所述衬色层23的涂层材料A含有氧化铁、二萘嵌苯红和黑色颜料，形成所述变色图案的涂层材料B和形成所述变色油线的涂层材料C相同或不同，且各自含有氧化铁和二萘嵌苯红。在优选情况下，所述涂层材料A中包含的氧化铁的比例与所述涂层材料B和所述涂层材料C中包含的氧化铁的比例不同。
在优选情况下，所述变色图案比所述变色油线更贴近所述加热主体10的基底，温度变化更灵敏。也就是说，变色图案和变色油线不形成在同一个面上，在厚度方向上，变色图案比变色油线更靠近加热主体10的基底的内表面。在一种优选实施方式中，衬色层23上表面的局部区域形成有中涂层24，所述变色油线形成于所述中涂层24上表面的局部区域，变色图案形成于衬色层23上表面的局部区域。所述中涂层26一般为深色油层，其形成于变色油线和衬色层23之间，可以增加耐磨性，加强变色油线与衬色层23之间的结合力。
在本发明所述的加热器具中，当所述衬色层23上表面还形成有变色图案时，中涂层24和变色图案并列形成在同一个面上，并且中涂层24和变色图案二者一起不完全覆盖衬色层23的整个上表面，使得所述加热器具在外观上可以看到衬色层23、变色油线和变色图案的颜色图案。在优选情况下，为了增强变色图案的耐磨损性能，所述变色图案的上表面不高于所述中涂层24的上表面。更优选地，所述变色图案的厚度小于所述中涂层24的厚度。
在本发明所述的加热器具中，当所述衬色层23上表面还形成有变色图案时，所述变色图案可以形成于衬色层23上表面上未被中涂层24覆盖的任何区域。在优选情况下，所述变色图案位于所述加热主体10的基底的中部，中涂层24围绕变色图案的四周形成。进一步优选地，形成于中涂层24上表面上的变色油线也围绕变色图案的外周形成。使得所述加热器具在外观上可以看到衬色层23和变色图案的颜色图案位于加热器具内表面的中部，而变色油线的颜色图案围绕在衬色层23和变色图案的外周。在这种情况下，当变色图案(温度变化相对比较灵敏的颜色图案)的颜色发生变化时，可以更容易被使用者察觉。
如前所述，在本发明中，所述加热器具还可以包括形成于所述衬色层23下方的底涂层21。在这种情况下，所述底涂层21覆盖在加热主体10的基底的整个内表面上；衬色层23覆盖在底涂层21的整个上表面上；变色图案形成于衬色层23的中部；中涂层24围绕变色图案的外周形成，并且与变色图案分离(即相互之间不连接)；变色油线形成在中涂层24上表面的局部区域。
如前所述，在本发明中，所述加热器具还可以包括形成于所述加热器具内表面的最内层的透明面涂层25。通过透明面涂层25可以看到衬色层23、变色油线和变色图案的颜色图案。
在所述加热器具中，在一种实施方式中，所述加热主体10的基底的中心向上凸起，所述变色图案位于凸起部位的上端面。在这种情况下，由于变色图案处于高位，微微地凸出于基底表面，这样不容易被炒菜时的油或酱所掩盖，会更容易地被使用者所观察到。
在所述加热器具中，在一种实施方式中，所述加热器具为炒锅，所述加热主体10的基底包括铁外层和铝内层，所述衬色层23和/或所述变色图案形成在所述铝内层上且位于所述炒锅的中部。在炒锅的中心部位变色是最容易被观察到的，但是在电磁炉上加热的时候，由于电磁炉感应线圈绕线的原因(电磁炉中心并没绕有感应线圈)，这样就使得与炒锅中心相对的部位感应线圈缺失，而与感应线圈直接相对的部位温度却过高(这也是为什么加热主体的基底半径1/2处容易烧焦的原因)，铁的热传递效率是很低的，通过增设铝内层，可以把加热主体的基底与感应加线圈相对部位的热量传递到加热主体的基底中心，使得变色图案能更加及时、准确、真实地反映出加热主体的基底的温度。
在优选情况下，所述铝内层为中心厚且从中心向外周逐渐变薄的结构。通过这样的设计，使得热量尽量往锅中心转递，进一步地提高炒锅变色的准确性和及时性。
在优选情况下，所述铁外层底部具有镂空的圆形通孔，所述铝内层受到挤压凸出于所述通孔内，至少有一个所述通孔的垂直投影位于所述衬色层23和所述变色图案构成的区域内。通过这样的设计，一方面可以增加铝内层与铁外层的接触面积，把铁外层的热量迅速地往锅内传递，使得变色更加准确和及时；另一方面当把炒锅放在煤气灶上加热的时候，煤气灶中心的火力可以通过与变色区域相对的通孔内的铝层直接传递给变色材料，从而进一步地提高炒锅变色的准确性和及时性。
在本发明中，所述衬色层23、所述变色图案和所述变色油线各自可以通过本领域常规的方法形成。在优选情况下，所述衬色层23通过喷涂的方式形成，所述变色图案 和所述变色油线各自通过印刷方式形成。衬色层23的面积较大，通过喷涂的方式形成，可以更加均匀的涂覆在基底或底涂层上，变色油线和变色图案面积较小，通过印刷方式，效率更高。
根据本发明的一种优选实施方式，如图2所示，所述加热器具包括：
包括被加热的基底的加热主体10；
施加在所述加热主体10的基底的内表面上的底涂层21；
施加在所述底涂层21的上表面上的衬色层23；
在衬色层23的上表面上，一部分区域施加有变色图案，另一部分区域施加有中涂层24；
施加在所述中涂层24上表面的局部区域的变色油线；以及
覆盖所述衬色层23、所述变色图案、所述变色油线和所述中涂层24的透明面涂层25；
其中，在衬色层23、变色图案和变色油线三者中，至少所述变色油线和所述变色图案以可逆的方式随温度的变化而改变颜色。
在该实施方式中，当所述加热器具为锅具时，所述变色油线可以做成油量刻度线，使其具有指示放油量的功能。在加热过程中，当加热至预定温度时，该变色油线变色，从而提醒用户放油和指示放油量。
在该实施方式中，所述变色图案设置在所述衬色层23的上表面上，通过与衬色层23的颜色之间的对比来呈现变色图案。例如，当所述变色图案的形状为油滴状，在常温下，变色图案与衬色层23的颜色相同(如均为浅红色)，此时在外观上不能清晰辨认出变色图案的轮廓；当加热器具加热至预定温度时，变色图案的颜色由浅变深，通过与衬色层23的颜色形成对比，显现出油滴状的清晰轮廓，从而提示烹饪者放油进行烹饪。
当所述加热器具为锅具时，在烹饪食物之前的热锅期间，当加热器具温度刚开始处于常温状态时，衬色层23、变色油线和变色图案的颜色相同；当温度升高到适合烹饪温度，即180℃左右时，变色油线和变色图案的颜色由深变浅或由浅变深，使得锅内颜色由整体单一色调图案变成有不同颜色的图案，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题。在烹饪完成后，锅内温度恢复至常温，变色油线和变色图案的颜色由浅变深或由深变浅，恢复到温度升高前的颜色深浅状态，即变色油线和变色图案的颜色随温度变化是可逆变化的。
而且，在上述优选实施方式所述的加热器具中，在烹饪过程中变色层由单一色调图案变成有不同颜色的图案，可以让使用者更加清楚及时的判断出温度达到合适要求。
另外，涂覆的衬色层23和中涂层24可以充当保护层，加强保护加热主体10(即锅身基材)不会在使用中被腐蚀。
此外，形成在加热器具内表面的最内层的透明面涂层25可以有效保护衬色层23、变色油线和变色图案，使其不会在长久使用过程中脱落而丧失效果。
在优选情况下，上述优选实施方式所述的加热器具的制备过程可以包括：
步骤1、先在锅身基材(即加热主体10的基底)的整个内表面上涂覆底涂层21；
步骤2、之后在底涂层21的全部区域涂覆一层衬色层23；
步骤3、然后用遮挡物挡住衬色层23上表面的局部区域，在未遮挡的区域涂覆中涂层24；
步骤4、接下来在衬色层23的遮挡区域的局部涂覆变色图案；
步骤5、接着在中涂层24上表面的局部区域形成变色油线；
步骤5、最后涂覆透明面涂层25覆盖整体表面。
在第四方面中，所述加热主体10的内表面上形成有凹槽，且所述变色层可以设置于凹槽上。变色层形成在凹槽内，在长期使用过程中不会受到磨损消耗，大大延长了变色涂层的使用寿命。因此，如图3A-3E所示，本发明所述的加热器具包括加热主体10，所述加热主体10的内表面上形成有凹槽13，所述凹槽13上形成有变色层20，所述变色层20以可逆的方式随温度的变化而改变颜色。
在本发明所述的加热器具中，所述凹槽13可以按照本领域常规的方式开设。优选情况下，如图3B所示，所述凹槽13的口部宽度A不小于底部宽度B。进一步优选地，所述凹槽13的截面为梯形。在本文中，凹槽截面是指沿着凹槽宽度方向的竖直截面。因为在烹饪过程中人眼与变色层20之间都会形成一定角度的，把凹槽的侧面做成斜面更容易看清变色层20。更进一步优选地，所述凹槽13的口部宽度A与底部宽度B之间的比例为1.01-1.5：1。所述凹槽13的深度可以为0.1-3mm，优选为0.2-2mm。按照上述尺寸开设凹槽有利于变色层以及底涂层等涂料的涂覆，使得这些涂层与加热主体更牢固地结合在一起。
在本发明所述的加热器具中，优选地，所述变色层20的上表面不高于所述加热主体10的内表面。通过这样设计，可以防止变色层20在使用过程中被磨损，从而延长变色层20的使用寿命。
在本发明所述的加热器具中，所述凹槽13的整体形状没有特别的限定。在一种优选实施方式中，如图3C所示，所述凹槽13为围绕加热主体的基底中心的一个或多个环形。在这种情况下，一方面形成于凹槽13中的变色层可以避开加热主体的基底中心的加热盲区，从而能够更准确、及时地反应加热主体的基底的温度；另一方面环形的变色层图案可以起到显示加油量的作用，从而能够避免优良加入过多或过少造成的健康或口感问题。
在另外的实施方式中，所述凹槽13可以包括相互分离的多个子凹槽，所述多个子凹槽呈环形分布。优选地，如图3D和3E所示，这些子凹槽围绕加热主体的基底中心呈环形分布。对于单个的子凹槽，其形状没有特别的限定，例如可以为规则的几何形状，如圆形、弧形、方形等。
在本发明中，所述变色层20可以由含有以可逆的方式随温度的变化而改变颜色的化学物质的涂层材料形成。例如，形成所述变色层20的涂层材料可以含有氧化铁和二萘嵌苯红。
如前所述，在本发明中，所述加热器具还可以包括覆盖加热主体内表面和凹槽表 面的底涂层21，在所述凹槽13中，变色层20形成于底涂层21之上。在形成涂层的过程中，首先在加热主体内部所有裸露的表面(包括加热主体本身平整的表面以及凹槽的底面和侧面)上涂覆底涂层21，然后在凹槽13中涂覆变色层20。
在本发明中，所述底涂层21优选为黑色。在这种情况下，所述底涂层21可以充当衬色的作用，使得使用者更加关注变色层20颜色的变化。
在优选情况下，所述变色层20的上表面低于所述加热主体的内表面上底涂层的上表面。通过这样设计，可以防止变色层20在使用过程中被磨损，从而延长变色层20的使用寿命。
在本发明中，所述加热主体10的材料可以为本领域的常规选择，例如可以为本领域常规的非磁性或弱导磁性材料。在一种优选实施方式中，所述加热主体1的材料为铝或铝合金。
根据本发明的一种具体实施方式，如图3A和3C所示，所述加热器具包括：
加热主体10，加热主体10的内表面上形成有凹槽13，凹槽13形成为围绕加热主体的基底中心的环形(一个或多个)；
覆盖加热主体内表面和凹槽表面的底涂层21；以及
在凹槽13中，形成于底涂层21之上的变色层20。
根据本发明的另一种具体实施方式，如图3A、3D和3E所示，所述加热器具包括：
加热主体10，加热主体10的内表面上形成有凹槽13，凹槽13包括相互分离的多个子凹槽，这些子凹槽呈环形分布(可以分布在一个或多个环形中)，各个子凹槽为圆形或弧形；
覆盖加热主体内表面和凹槽表面的底涂层21；以及
在凹槽13中，形成于底涂层21之上的变色层20。
根据上述具体实施方式的加热器具，当其为锅具时，在烹饪食物之前的热锅期间，当加热器具温度刚开始处于常温状态时，变色层20呈现出深颜色或浅颜色，当加热后温度升高到适合烹饪温度，即180℃左右时，变色层20的颜色由深变浅或由浅变深，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题。当烹饪完成后，锅内温度恢复至常温，变色层20的颜色由浅变深或由深变浅，恢复到温度升高前的颜色深浅状态，即变色层20的颜色随温度变化是可逆变化。
在第五方面中，所述加热器具为适用于电磁加热的加热器具，所述加热主体的外表面上形成有导磁层，因此，如图4A-4C所示，本发明所述的适用于电磁加热的加热器具包括：
加热主体10；
形成在所述加热主体10外表面上的导磁层12；以及
形成于所述加热主体10内表面上的变色层20，其中，所述变色层20以可逆的方式随温度的变化而改变颜色。
在本发明中，所述变色层20仅覆盖加热主体10内表面的局部区域。所述变色层20的形成位置到加热主体的基底中心的距离R为加热主体的基底半径的20-70％，具体地，例如可以为20％、25％、30％、35％、40％、45％、50％、55％、60％、65％、70％以及这些点值中任意两个所构成的范围中的任意值。在优选情况下，所述变色层20的形成位置到加热主体的基底中心的距离R为加热主体的基底半径的40-60％，最优选为50％左右。当变色层20的形成位置到加热主体的基底中心的距离R在上述范围内时，在电磁加热过程中变色层对应于磁力线较强的区域，使得变色层能够更准确、及时地反应加热主体的基底的温度。在具体实施方式中，所述变色层20的形成位置到加热主体的基底中心的距离R可以为25-100mm，优选为40-80mm。
在本发明中，所述变色层20的图案形状没有特别的限定，各种规则的几何图形或不规则形状均可。在优选的实施方式中，所述变色层20为围绕加热主体的基底中心的环形图案。在这种情况下，环形的变色图案层与磁力线较强的环形加热区间相对应，从而能够达到更好的示温效果。而且，环形的变色图案层(如环线)可以起到显示放油量的作用。
根据本发明的一种实施方式，所述变色层20包括至少两个变色图案层，例如可以为2-10个变色图案层。所述至少两个变色图案层可以是相互分离的，也可以是相互层叠的。在优选情况下，所述至少两个变色图案层相互层叠，且在上下相邻的两个变色图案层之间，位于上方的变色图案层部分覆盖位于下方的变色图案层。
在本发明中，当变色层20包括至少两个变色图案层时，所述至少两个变色图案层在常温下颜色相异，在预定温度下颜色相同，或者所述至少两个变色图案层在常温下颜色相同，在预定温度下颜色相异。在本文中，预定温度是指使用者可以加油进行烹饪的温度，通常为170℃以上，优选175℃以上，更优选175-200℃，最优选180℃左右。通过上述方式配置变色层，使得加热器具被加热到预定温度时，加热器具内表面上的图案由多种颜色变成单种颜色或者单种颜色变成多种颜色，使用者通过视觉可以明显观察到颜色变化，从而提醒使用者此时可以放油进行烹饪，达到了较好的示温效果。
在本发明中，所述变色层20可以由含有以可逆的方式随温度的变化而改变颜色的化学物质的涂层材料形成。例如，形成所述变色层20的涂层材料可以含有氧化铁和二萘嵌苯红。
如前所述，在本发明中，所述加热器具还可以包括形成于所述加热主体10内表面上的底涂层21，所述变色层20形成于所述底涂层21的上表面上。优选地，所述底涂层21覆盖加热主体10的整个内表面。
在本发明中，所述导磁层12可以覆盖加热主体外表面的局部区域，也可以覆盖整个加热主体外表面。在优选情况下，所述导磁层12覆盖加热主体外表面的加热主体的基底部分。
在本发明中，所述导磁层12可以由本领域常规的磁性材料形成。在优选情况下，所述导磁层12由磁性的铁合金形成。所述磁性的铁合金可以为Fe-C合金、Fe-Si合金和Fe-Mn合金中的至少一种。
在本发明中，所述加热主体10的材料可以为本领域的常规选择，例如可以为本领域常规的非磁性或弱导磁性材料。在一种优选实施方式中，所述加热主体1的材料为铝或铝合金。
根据本发明的一种具体实施方式，如图4A所示，所述加热器具包括：
加热主体10；
形成在所述加热主体10的外表面上的导磁层12，导磁层12覆盖整个外表面；以及
形成在所述加热主体10的内表面上的变色层20，变色层20覆盖加热主体10内表面的局部区域，具体地，变色层20为以加热主体的基底中心为圆心的环形，变色层20到加热主体的基底中心的距离R为加热主体的基底半径的20-70％，优选为40-60，更优选为50％左右。
根据本发明的另一种具体实施方式，如图4B所示，所述加热器具包括：
加热主体10；
形成在所述加热主体10的外表面上的导磁层12，导磁层12覆盖加热主体外表面的加热主体的基底部分；以及
形成在所述加热主体10的内表面上的变色层20，变色层20覆盖加热主体10内表面的局部区域，具体地，变色层20为以加热主体的基底中心为圆心的环形，变色层20到加热主体的基底中心的距离R为加热主体的基底半径的20-70％，优选为40-60，更优选为50％左右；而且，变色层20包括两个相互层叠的变色图案层(即第一变色图案层和第二变色图案层)，第二变色图案层部分覆盖在第一变色图案层的上表面上；
其中，第一变色图案层和第二变色图案层在常温下颜色相异，在预定温度下颜色相同；或者第一变色图案层和第二变色图案层在常温下颜色相同，在预定温度下颜色相异。
根据本发明的另一种具体实施方式，如图4C所示，所述加热器具包括：
加热主体10；
形成在所述加热主体10的外表面上的导磁层12，导磁层12覆盖加热主体外表面的加热主体的基底部分；以及
形成在所述加热主体10的内表面上的变色层20，变色层20覆盖加热主体10内表面的局部区域，具体地，变色层20为以加热主体的基底中心为圆心的环形，变色层20到加热主体的基底中心的距离R为加热主体的基底半径的20-70％，优选为40-60，更优选为50％左右。
根据上述具体实施方式的加热器具，在电磁灶上加热时，在烹饪食物之前的热锅期间，当加热器具温度刚开始处于常温状态时，变色层20呈现出深颜色或浅颜色，当加热后温度升高到适合烹饪温度，即180℃左右时，变色层20的颜色由深变浅或由浅变深，以此提醒使用者此时可以放油进行烹饪，避免了温度过低或过高而造成烹饪效果不佳、烹饪油烟大的问题。当烹饪完成后，锅内温度恢复至常温，变色层20的颜色由浅变深或由深变浅，恢复到温度升高前的颜色深浅状态，即变色层20的颜色随温度变化 是可逆变化。
以上详细描述了本发明的优选实施方式，但是，本发明并不限于此。在本发明的技术构思范围内，可以对本发明的技术方案进行多种简单变型，包括各个技术特征以任何其它的合适方式进行组合，这些简单变型和组合同样应当视为本发明所公开的内容，均属于本发明的保护范围。

Claims (26)

  1. 一种加热器具，其特征在于，该加热器具包括：
    加热主体(10)；以及
    形成在所述加热主体(10)内表面上的变色层(20)，其中，所述变色层(20)呈长条的线状，且所述变色层(20)以可逆的方式随温度的变化而改变颜色。
  2. 根据权利要求1所述的加热器具，其特征在于，所述加热器具还包括依次形成在所述加热主体(10)的基底的内表面上的衬色层(23)和中涂层(24)，所述中涂层(24)形成于所述衬色层(23)上表面的局部区域，所述变色层(20)形成于所述中涂层(24)上表面的局部区域。
  3. 根据权利要求1或2所述的加热器具，其特征在于，所述加热主体(10)的内表面上形成有凹槽(13)，且所述变色层(20)设置于凹槽(13)上。
  4. 根据权利要求1-3中任意一项所述的加热器具，其特征在于，所述变色层(20)的形成位置到加热主体的基底中心的距离为加热主体的基底半径的20-70％，优选为40-60％。
  5. 根据权利要求1-4中任意一项所述的加热器具，其特征在于，所述变色层(20)为环绕加热主体的基底中心的环形图案。
  6. 根据权利要求1-5中任意一项所述的加热器具，其特征在于，所述变色层(20)包括至少两个变色图案层。
  7. 根据权利要求6所述的加热器具，其特征在于，所述至少两个变色图案层相互层叠，且在上下相邻的两个变色图案层之间，位于上方的变色图案层部分覆盖位于下方的变色图案层。
  8. 根据权利要求6或7所述的加热器具，其特征在于，所述至少两个变色图案层在常温下颜色相异，在预定温度下颜色相同，或者
    所述至少两个变色图案层在常温下颜色相同，在预定温度下颜色相异。
  9. 根据权利要求1所述的加热器具，其特征在于，所述加热器具还包括依次形成在所述加热主体(10)的基底的内表面上的衬色层(23)和中涂层(24)，所述变色层包括第一变色图案(30)和第二变色图案(26)，所述中涂层(24)形成于所述衬色层(23)上表面的局部区域，所述第一变色图案(30)形成于所述中涂层(24)上表面的局部区域，所述第二变色图案(26)形成于所述衬色层(23)上表面的局部区域。
  10. 根据权利要求9所述的加热器具，其特征在于，所述第二变色图案(26)的上表面不高于所述中涂层(24)的上表面。
  11. 根据权利要求9所述的加热器具，其特征在于，所述第二变色图案(26)位于所述加热主体(10)的基底的中部。
  12. 根据权利要求9所述的加热器具，其特征在于，所述第一变色图案(30)围绕所述第二变色图案(26)的外周形成。
  13. 根据权利要求9-12中任意一项所述的加热器具，其特征在于，在常温下，所述第一变色图案(30)、所述第二变色图案(26)和所述衬色层(23)的颜色相同；在预定温度下，所述第一变色图案(30)和所述第二变色图案(26)的颜色与所述衬色层(23)的颜色相异。
  14. 根据权利要求9-13中任意一项所述的加热器具，其特征在于，所述第二变色图案(26)为油滴状。
  15. 根据权利要求9-14中任意一项所述的加热器具，其特征在于，所述第一变色图案(30)为多个同心环形或扇形。
  16. 根据权利要求1-15中任意一项所述的加热器具，其特征在于，所述加热主体(10)内表面上还形成有底涂层(21)，所述底涂层(21)直接覆盖加热主体(10)的整个内表面，且变色层(20)形成在所述底涂层(21)的上表面上。
  17. 根据权利要求16所述的加热器具，其特征在于，所述变色层(20)与所述底涂层(21)呈现出不同的颜色。
  18. 根据权利要求1-17中任意一项所述的加热器具，其特征在于，所述加热器具还包括形成在所述加热主体(10)外表面上的导磁层(12)。
  19. 根据权利要求1-18中任意一项所述的加热器具，其特征在于，还包括形成于所述加热器具内表面的最内层的透明面涂层(30)。
  20. 根据权利要求1-19中任意一项所述的加热器具，其特征在于，所述加热器具为炒锅，所述加热主体(10)包括铁外层和铝内层，所述变色层(20)形成在所述铝内层上。
  21. 根据权利要求20所述的加热器具，其特征在于，所述铝内层为中心厚且从中 心向外周逐渐变薄的结构。
  22. 根据权利要求20所述的加热器具，其特征在于，所述铁外层底部具有镂空的圆形通孔，所述铝内层受到挤压凸出于所述通孔内，至少有一个所述通孔的垂直投影位于所述变色层(20)构成的区域内。
  23. 根据权利要求1-22中任意一项所述的加热器具，其特征在于，形成所述变色层(20)的涂层材料含有氧化铁和二萘嵌苯红。
  24. 根据权利要求1-23中任意一项所述的加热器具，其特征在于，所述变色层(20)通过印刷方式形成。
  25. 一种适用于电磁加热的加热器具，其特征在于，该加热器具包括：
    加热主体(10)；
    形成在所述加热主体(10)外表面上的导磁层(12)；以及
    形成于所述加热主体(10)内表面上的变色层(20)，且所述变色层(20)的形成位置位于加热主体的基底中心的附近；
    其中，所述变色层(20)以可逆的方式随温度的变化而改变颜色。
  26. 根据权利要求25所述的加热器具，其特征在于，所述变色层(20)的形成位置到加热主体的基底中心的距离为加热主体的基底半径的20-70％，优选40-60％。
PCT/CN2018/099993 2017-08-10 2018-08-10 加热器具 WO2019029710A1 (zh)

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CN201720999644.5U CN208658659U (zh) 2017-06-08 2017-08-10 一种加热器具
CN201720995067.2U CN208709303U (zh) 2017-06-08 2017-08-10 一种锅具
CN201720999636.0U CN208447207U (zh) 2017-06-08 2017-08-10 一种加热器具
CN201720999636.0 2017-08-10
CN201720995120.9U CN208709304U (zh) 2017-06-08 2017-08-10 一种锅具
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CN201721010451.9U CN208243382U (zh) 2017-08-14 2017-08-14 一种适用于电磁加热的锅具
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