WO2019029710A1

WO2019029710A1 - Heating device

Info

Publication number: WO2019029710A1
Application number: PCT/CN2018/099993
Authority: WO
Inventors: 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: 2017-08-10
Filing date: 2018-08-10
Publication date: 2019-02-14

Abstract

A heating device. The heating device comprises a heating main body (10) and a color change layer (20) formed on the inner surface of the heating main body (10). The color change layer (20) is a line-shaped long strip, and the color of the color change layer (20) changes as the temperature changes in a reversible manner. The arrangement of the color change layer (20) can prompt a temperature, so as to remind a user of starting to use (putting oil and carrying out cooking) and allow the user to conveniently determine the amounts of ingredients (especially the amount of oil to be put). In another implementation manner, the heating device is a device for electromagnetic heating. In this case, the color change layer (20) is formed near the center of a substrate, and the heating blind region (that is, the center of the substrate) is avoided, and accordingly, the temperature change of the substrate can be more timely responded.

Description

Heating appliance

Technical field

The invention relates to the field of household appliances, and in particular to a heating appliance.

Background technique

During the hot pot before cooking food, because the user is not sure about the temperature, it is impossible to determine the time point for cooking and cooking. If the temperature is too low, the cooking effect is not good. If the temperature is too high, the oil will be cooked. Produces a large amount of soot, which is not good for your health and increases the difficulty of cleaning the kitchen. On the other hand, when the user starts to drain the oil, it is impossible to judge how much oil to put. Putting too much oil will cause the user to ingest too much fat, which is not good for health.

The existing solution is to print the color changing ink on the surface of the bottom of the pot. When the temperature of the bottom of the pot rises to about 180 ° C, 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.

Summary of the invention

SUMMARY OF THE INVENTION 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.

In order to achieve the above object, the present invention provides a heating appliance comprising:

Heating the body;

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.

Preferably, 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.

Preferably, a groove is formed on an inner surface of the heating body, and the color changing layer is disposed on the groove.

Preferably, 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.

Preferably, the color changing layer is an annular pattern surrounding the center of the substrate of the heating body.

Preferably, the color changing layer comprises at least two color changing pattern layers.

Preferably, 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.

Preferably, 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.

Preferably, 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.

Preferably, the upper surface of the second color changing pattern is not higher than the upper surface of the middle coating layer.

Preferably, the second color changing pattern is located in the middle of the base of the heating body.

Preferably, the first color changing pattern is formed around an outer circumference of the second color changing pattern.

Preferably, at a normal temperature, 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.

Preferably, the second color changing pattern is in the form of oil droplets.

Preferably, the first color changing pattern is a plurality of concentric rings or sectors.

Preferably, 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.

Preferably, the color changing layer and the undercoat layer exhibit different colors.

Preferably, the heating device further includes a magnetic conductive layer formed on an outer surface of the heating body.

Preferably, a transparent top coat formed on the innermost layer of the inner surface of the heating device is further included.

Preferably, the heating device is a wok, and 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.

Preferably, the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery.

Preferably, 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.

Preferably, the coating material forming the color-changing layer contains iron oxide and perylene.

Preferably, the color changing layer is formed by printing.

The invention also provides a heating device suitable for electromagnetic heating, the heating device comprising:

Heating the body;

a magnetically permeable layer formed on an outer surface of the heating body;

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;

Wherein the color changing layer changes color in a reversible manner with changes in temperature.

In the heating device of the present invention, 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). In another embodiment, 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.

DRAWINGS

1A is a schematic structural view of a heating device according to an embodiment of the present invention;

1B is a schematic structural view of a heating device according to another embodiment of the present invention;

1C is a schematic view showing the appearance of a heating device according to a preferred embodiment of the present invention;

2 is a schematic structural view of a heating device according to a preferred embodiment of the present invention;

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;

4A is a schematic structural view of a heating device according to an embodiment of the present invention;

4B is a schematic structural view of a heating device according to another embodiment of the present invention;

4C is a schematic structural view of a heating device according to another embodiment of the present invention.

Description of the reference numerals

10 heating body 13 groove

12 magnetic permeability layer 21 undercoat layer

20 color changing layer 25 transparent surface coating

23 color layer 24 medium coating

26 second color change pattern (or color change pattern)

30 first color change pattern (or color changing oil line)

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative and not restrictive.

In the present invention, the terms "upper and lower" as used generally refer to the upper and lower directions as shown in the accompanying drawings, and the "inside and outside" refer to the respective components themselves. Inside and outside of the outline.

In a first aspect, as shown in Figures 1A-C, the heating appliance of the present invention comprises:

Heating the body 10;

a color changing layer 20 formed on the inner surface of the heating body 10 (the color changing layer 20 is in the form of a long line so as to function as a gauge);

Wherein, the color changing layer 20 changes color in a reversible manner with changes in temperature.

In the heating device according to the present invention, preferably, 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) In the case of a cooker, an induction cooker, etc., 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. Preferably, the minimum distance of the color changing layer 20 from the center of the substrate of the heating body is 25-30 mm.

In the heating device according to the present invention, the shape of the color changing layer 20 is not particularly limited, and various conventional geometric shapes or irregular shapes may be used. Preferably, 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.

In the heating device according to the present invention, preferably, 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. In this case, 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.

In the heating device of the present invention, the color changing layer 20 may be a single pattern layer or a plurality of pattern layers. In the preferred case, the color-changing layer 20 is 2-10 (more preferably 2-5) color-separating patterns separated from each other.

When the color-changing layer 20 is a plurality of pattern layers, the pattern layers may be formed on the same surface or may be formed on different surfaces. As shown in 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. When a plurality of color-changing pattern layers (ie, color-changing layers) are formed on different faces, in one embodiment, as shown in 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.

When the color-changing layer 20 is a plurality of pattern layers, the plurality of color-changing pattern layers (ie, the color-changing layers) may have the same color-changing effect, or at least two color-changing patterns may have different color-changing effects. In one embodiment, 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. In another embodiment, 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.

According to a preferred embodiment of the invention, 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). In this case, 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.

In the present invention, the heating device may further include an undercoat layer 21. In one embodiment, 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.

Preferably, 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). Preferably, 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.

In the preferred case, the undercoat layer 21 is preferably black. In this case, 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.

In the present invention, 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.

In the present invention, the heating device may further include a transparent top coat layer 25. In one embodiment, 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. In another embodiment, 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.

In the present invention, 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.

In the present invention, 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. For example, the coating material forming the color-changing layer 20 contains iron oxide and perylene.

In one embodiment, the heating device is a wok, the heating body 10 includes an outer layer of iron and an inner layer of aluminum, and the color changing layer 20 is formed on the inner layer of aluminum. By designing the heating body structure in this way, the color changing layer 20 can more accurately, accurately and truly reflect the temperature of the substrate of the heating body.

In the preferred case, the aluminum inner layer is a structure having a center thick and gradually thinning from the center to the outer periphery. Through such a design, the heat is transferred to the center of the pot as much as possible, further improving the accuracy and timeliness of the discoloration of the wok.

Preferably, 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. Through such a design, on the one hand, 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; on the other hand, when the wok is placed in the gas When the stove is heated, 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.

In the present invention, 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.

According to a specific embodiment of the present invention, as shown in FIGS. 1A and 1C, the heating device includes:

Heating the body 10;

An undercoat layer 21 formed on an inner surface of the heating body 10, the undercoat layer 21 covering the entire inner surface of the heating body;

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.

According to 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. After the cooking is completed, 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.

Further, in the heating device according to the above embodiment, 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.

According to another embodiment of the present invention, as shown in FIGS. 1B and 1C, the heating device includes:

Heating the body 10;

a 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;

a second color-changing pattern layer formed on a partial region of the upper surface of the transparent top coat layer 25, the second color-changing pattern layer being a ring shape surrounding the center of the substrate of the heating body, and the first color-changing pattern layer and the second layer in appearance 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 according to the above embodiment, 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. After the cooking is completed, 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.

In the second aspect, 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 color or single color becomes a plurality of colors, and the user or the cook can clearly observe the color change through the visual, thereby reminding the user that the corresponding operation, such as oil discharge, can be performed at this time, thereby achieving a better temperature display effect. . Therefore, as shown in FIG. 2, the heating device of the present invention comprises:

a heating body 10 comprising a heated substrate;

a coloring layer 23, a first color changing pattern 30, and an intermediate coating layer 24 formed on an inner surface of the substrate of the heating body 10, the intermediate coating layer 24 being formed on a partial region of the upper surface of the coloring layer 23, 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.

In the heating device, 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.

Preferably, 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.

When the second color changing pattern is further formed on the upper surface of the color layer 23, 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. In a preferred case, in order to enhance the wear resistance of the second color changing pattern, 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.

When the second color changing pattern is further formed on the upper surface of the color layer 23, 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. Preferably, 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. Further preferably, 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.

Preferably, at a normal temperature, 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.

As used herein, "predetermined temperature" refers to a temperature suitable for a user to perform an operation with the heating device. For example, when the heating device is a pan, 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.

In this article, "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.

In a preferred embodiment, 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.

In particular, when the second 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 second color-changing pattern can achieve a good temperature-sensing effect. In one embodiment, when 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.

When the heating device is a pot, 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).

In the present invention, 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. For example, 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.

As described above, in the present invention, the heating device may further include an undercoat layer 21 formed under the color-coded layer 23. In this case, 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.

As described above, in the present invention, 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.

In the present invention, 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.

In the heating device, in an embodiment, 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. With such a design, when heated to a preset temperature, the second color changing pattern is fused with the color-imparting layer 23, and the effect of disappearing of the second color-changing pattern is generated, thereby reminding people of the time for discharging the oil.

In the heating device, in one embodiment, 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. In this case, 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.

In the heating device, in one embodiment, the heating device is a wok, and 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.

Preferably, 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. Through such a design, on the one hand, 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; on the other hand, when the wok is placed in the gas When the stove is heated, 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.

In the present invention, 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. Preferably, 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. .

According to a preferred embodiment of the present invention, as shown in FIG. 2, the heating device comprises:

a heating body 10 comprising a heated substrate;

An undercoat layer 21 applied on an inner surface of the substrate of the heating body 10;

a color layer 23 applied on the upper surface of the undercoat layer 21;

On the upper surface of the color layer 23, 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;

a first color changing pattern 30 applied to a partial region of the upper surface of the intermediate coating layer 24;

Covering the coloring layer 23, the second color changing pattern 26, the first color changing pattern 30 and the transparent coating layer 25 of the intermediate coating layer 24;

Wherein, in the three color layer 23, the second color changing pattern 26 and the first color changing pattern 30, at least the first color changing pattern 30 and the second color changing pattern 26 change color in a reversible manner with changes in temperature. .

In this embodiment, 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.

In this embodiment, 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. For example, when the shape of the second color changing pattern 26 is oil drop, 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.

When the heating device is a pot, during the hot pot before cooking the food, when the temperature of the heating device is initially at a normal temperature, the color of the color layer 23, the first color changing pattern 30 and the second color changing pattern are the same; When 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. After the cooking is completed, 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.

Moreover, in the heating device according to the above preferred embodiment, 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.

Additionally, the 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.

In addition, 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.

Preferably, 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.

In a third aspect, 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:

a heating body 10 including a heated substrate;

A color change oil line and a color change pattern formed on an inner surface of the base of the heating body 10, the color change oil line and the color change pattern change color in a reversible manner with changes in temperature.

In the heating device of the present invention, 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. Preferably, 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.

As described above, in a preferred embodiment, 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. Preferably, the color changing pattern is formed on the upper surface of the color layer 23.

Further preferably, at room temperature, 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.

In a preferred embodiment, 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. In this case, only 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. .

In particular, 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. In one embodiment, when 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.

When the heating device is a pot, 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. 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 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).

In the present invention, 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. For example, the coating material A forming the color-coded layer 23 contains iron oxide, perylene red, and black pigment, and the coating material B forming the color-changing pattern is the same as the coating material C forming the color-changing oil line. Or different, and each contains 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.

Preferably, 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. In a preferred embodiment, 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.

In 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. In the preferred case, in order to enhance the abrasion resistance of the color changing pattern, the upper surface 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.

In the heating device according to the present invention, 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. . Preferably, 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. Further preferably, 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. In this case, when the color of the color changing pattern (the color pattern in which the temperature change is relatively sensitive) changes, it can be more easily perceived by the user.

As described above, in the present invention, the heating device may further include an undercoat layer 21 formed under the color-coded layer 23. In this case, 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.

As described above, in the present invention, 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.

In the heating device, in one embodiment, 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. In this case, 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.

In the heating device, in one embodiment, the heating device is a wok, and 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.

Preferably, 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. Through such a design, on the one hand, 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; on the other hand, when the wok is placed in the gas When the stove is heated, 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.

In the present invention, 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. Preferably, 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.

a heating body 10 comprising a heated substrate;

a color layer 23 applied on the upper surface of the undercoat layer 21;

On the upper surface of the color-imparting layer 23, 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;

a color changing oil line applied to a localized portion of the upper surface of the intermediate coating 24;

Covering the coloring layer 23, the color changing pattern, the color changing oil line and the transparent top coat layer 25 of the intermediate coating layer 24;

Wherein, in the color-imparting layer 23, 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.

In this embodiment, when the heating device is a pot, the color changing oil line 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.

In this embodiment, 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. For example, when the shape of the color changing pattern is oil drop, 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; When 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.

When the heater is a pot, during the hot pot before cooking the food, when the temperature of the heating device is initially at a normal temperature, the color of the color layer 23, the color changing oil line and the color changing pattern are the same; when 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 When cooking, you can put oil on the cooking, avoiding the problem that the temperature is too low or too high, resulting in poor cooking and cooking fumes. After the cooking is completed, 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.

Moreover, in the heating device according to the above preferred embodiment, 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.

Further, 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.

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 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.

In the fourth aspect, 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.

In the heating device of the present invention, the recess 13 can be opened in a manner conventional in the art. Preferably, as shown in FIG. 3B, the mouth width A of the groove 13 is not less than the bottom width B. Further preferably, the groove 13 has a trapezoidal cross section. Herein, 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. Still more preferably, 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.

In the heating device according to the present invention, preferably, the upper surface of the color changing layer 20 is not higher than the inner surface of the heating body 10. By such design, it is possible to prevent the color-changing layer 20 from being worn during use, thereby prolonging the service life of the color-changing layer 20.

In the heating device according to the present invention, the overall shape of the groove 13 is not particularly limited. In a preferred embodiment, as shown in Figure 3C, the groove 13 is one or more annular shapes surrounding the center of the substrate of the heating body. In this case, on the one hand, 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.

In other embodiments, the groove 13 may include a plurality of sub-grooves separated from each other, the plurality of sub-grooves being annularly distributed. Preferably, as shown in Figures 3D and 3E, the sub-grooves are annularly distributed around the center of the base of the heating body. For a single sub-groove, 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.

In the present invention, 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. For example, the coating material forming the color-changing layer 20 may contain iron oxide and perylene.

As described above, in the present invention, 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. In the process of forming the coating, 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.

In the present invention, the undercoat layer 21 is preferably black. In this case, 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.

Preferably, 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. By such design, it is possible to prevent the color-changing layer 20 from being worn during use, thereby prolonging the service life of the color-changing layer 20.

In the present invention, 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. In a preferred embodiment, the material of the heating body 1 is aluminum or an aluminum alloy.

According to a specific embodiment of the present invention, as shown in FIGS. 3A and 3C, 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;

An undercoat layer 21 covering the inner surface of the heating body and the surface of the groove;

In the groove 13, a color changing layer 20 is formed on the undercoat layer 21.

According to another embodiment of the present invention, as shown in Figures 3A, 3D and 3E, the heating device comprises:

Heating the main body 10, 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;

According to the heating device of the above embodiment, 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 When the temperature rises to 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 problem of poor cooking and cooking fumes. When the cooking is completed, 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.

In a fifth aspect, 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:

Heating the body 10;

a magnetically permeable layer 12 formed on an outer surface of the heating body 10;

A color changing layer 20 formed on the inner surface of the heating body 10, wherein the color changing layer 20 changes color in a reversible manner with changes in temperature.

In the present invention, 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. Preferably, 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. When the distance R from the formation position of the color changing layer 20 to the center of the substrate of the heating body is within the above range, 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 temperature of the substrate. In a specific embodiment, 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.

In the present invention, the pattern shape of the color-changing layer 20 is not particularly limited, and various regular geometric shapes or irregular shapes may be used. In a preferred embodiment, the color changing layer 20 is an annular pattern surrounding the center of the substrate of the heating body. In this case, 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. Moreover, a circular color-changing pattern layer (such as a loop line) can function to show the amount of oil discharged.

According to an embodiment of the invention, 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. Preferably, 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.

In the present invention, when 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, or the at least two color changing pattern layers are The colors are the same at normal temperature, and the colors are different at the predetermined temperature. Herein, 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.

As described above, in the present invention, 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. . Preferably, the undercoat layer 21 covers the entire inner surface of the heating body 10.

In the present invention, 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. Preferably, the magnetically permeable layer 12 covers the base portion of the heated body that heats the outer surface of the body.

In the present invention, the magnetically permeable layer 12 may be formed of a magnetic material conventional in the art. In the preferred case, 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.

According to a specific embodiment of the present invention, as shown in FIG. 4A, the heating device includes:

Heating the body 10;

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. Specifically, 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.

According to another embodiment of the present invention, as shown in FIG. 4B, the heating device includes:

Heating the body 10;

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. Specifically, 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; moreover, 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;

Wherein the 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.

According to another embodiment of the present invention, as shown in FIG. 4C, the heating device includes:

Heating the body 10;

According to the heating device of the above specific embodiment, during heating of the electromagnetic cooker, 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 When the temperature rises to 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 problem of poor cooking and cooking fumes. When the cooking is completed, 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.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the present invention, various simple modifications can be made to the technical solutions of the present invention, including various technical features combined in any other suitable manner, and these simple variations and combinations should also be regarded as the disclosure of the present invention. All fall within the scope of protection of the present invention.

Claims

A heating device, characterized in that the heating device comprises:

Heating the body (10);

a color changing layer (20) formed on an inner surface of the heating body (10), wherein the color changing layer (20) is in the form of a long line, and the color changing layer (20) is reversibly in a temperature-dependent manner Change and change color.
The heating device according to claim 1, characterized in that said heating device further comprises a coloring layer (23) and an intermediate coating (24) which are sequentially formed on the inner surface of the base of said heating body (10) The intermediate coating layer (24) is formed on a partial region of the upper surface of the color-imparting layer (23), and the color-changing layer (20) is formed on a partial region of the upper surface of the intermediate coating layer (24).
The heating device according to claim 1 or 2, characterized in that the inner surface of the heating body (10) is formed with a groove (13), and the color changing layer (20) is disposed in the groove (13) on.
The heating device according to any one of claims 1 to 3, characterized in that the distance from the position at which 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, It is preferably 40-60%.
A heating device according to any one of claims 1 to 4, characterized in that the color changing layer (20) is an annular pattern surrounding the center of the base of the heating body.
A heating device according to any one of claims 1 to 5, characterized in that the color-changing layer (20) comprises at least two color-changing pattern layers.
The heating device according to claim 6, wherein 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 lower portion. Color changing pattern layer.
The heating device according to claim 6 or 7, wherein 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 according to claim 1, characterized in that said heating device further comprises a coloring layer (23) and an intermediate coating (24) which are sequentially formed on the inner surface of the base of said heating body (10) The color changing layer includes a first color changing pattern (30) and a second color changing pattern (26), and the middle coating layer (24) is formed on a partial region of an upper surface of the coloring layer (23), the first A color changing pattern (30) is formed on a partial region of the upper surface of the intermediate coating layer (24), and the second color changing pattern (26) is formed on a partial region of the upper surface of the coloring layer (23).
The heating device according to claim 9, characterized in that the upper surface of the second color changing pattern (26) is not higher than the upper surface of the intermediate coating (24).
The heating device according to claim 9, characterized in that the second color changing pattern (26) is located in the middle of the base of the heating body (10).
The heating device according to claim 9, wherein the first color changing pattern (30) is formed around an outer circumference of the second color changing pattern (26).
The heating device according to any one of claims 9 to 12, characterized in that, at normal temperature, the first color changing pattern (30), the second color changing pattern (26) and the color layer ( 23) The color is the same; at a predetermined temperature, the colors of the first color changing pattern (30) and the second color changing pattern (26) are different from the color of the coloring layer (23).
The heating device according to any one of claims 9 to 13, characterized in that the second color changing pattern (26) is in the form of an oil drop.
The heating device according to any one of claims 9 to 14, characterized in that the first color changing pattern (30) is a plurality of concentric rings or sectors.
The heating device according to any one of claims 1 to 15, characterized in that the inner surface of the heating body (10) is further formed with an undercoat layer (21), and the undercoat layer (21) directly covers The entire inner surface of the body (10) is heated, and a color changing layer (20) is formed on the upper surface of the undercoat layer (21).
The heating device according to claim 16, characterized in that the color-changing layer (20) and the undercoat layer (21) exhibit different colors.
The heating device according to any one of claims 1 to 17, characterized in that the heating device further comprises a magnetically permeable layer (12) formed on an outer surface of the heating body (10).
The heating device according to any one of claims 1 to 18, further comprising a transparent top coat (30) formed on an innermost surface of the inner surface of the heating device.
The heating device according to any one of claims 1 to 19, wherein the heating device is a wok, and the heating body (10) comprises an outer layer of iron and an inner layer of aluminum, the color changing layer (20) ) formed on the inner layer of aluminum.
A heating device according to claim 20, wherein said aluminum inner layer has a structure which is thick at the center and which is gradually thinned from the center to the outer periphery.
The heating device according to claim 20, wherein said iron outer layer bottom has a hollow circular through hole, said aluminum inner layer being pressed and projected out of said through hole, at least one of said The vertical projection of the through hole is located in the area formed by the color changing layer (20).
A heating device according to any one of claims 1 to 22, characterized in that the coating material forming the color-changing layer (20) contains iron oxide and perylene.
The heating device according to any one of claims 1 to 23, characterized in that the color-changing layer (20) is formed by printing.
A heating device suitable for electromagnetic heating, characterized in that the heating device comprises:

Heating the body (10);

a magnetically permeable layer (12) formed on an outer surface of the heating body (10);

a color changing layer (20) formed on an inner surface of the heating body (10), and the coloring layer (20) is formed at a position near a center of the substrate of the heating body;

Wherein the color changing layer (20) changes color in a reversible manner with changes in temperature.
The heating device according to claim 25, characterized in that the distance from which the color-changing layer (20) is formed to the center of the base of the heating body is 20-70%, preferably 40-60%, of the radius of the base of the heating body.