JP2015110003A - Cooking equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide cooking equipment having high hardness, being hardly scratched, having non-adhesive by which dirt hardly adheres to the cooking equipment, easily wiping off the dirt and being excellent in cleanability.SOLUTION: A coating film 12 serving as a ceramic layer mainly consisting of silicone-based or alumina-based fine powder 21 is formed on a surface of a base material 31 consisting of metal or surface-treated steel by coating. Ceramic components are selected as the fine powder 21 of the coating film 12 such that, when a user touches a surface of the coating film 12 prior to heating for cooking with his or her fingers, his or her finger prints do not adhere to the coating film 12 or the finger prints adhering thereto can be wiped off by dry wiping.

Description

  The present invention relates to cooking utensils such as cooking dishes and cooking containers.

  Conventionally, it has been known that a coating layer of fluorine-based resin or silicon-based resin is formed on a cooking utensil on which an object is to be cooked so that dirt such as oil and food residue scattered during cooking can be easily wiped off (for example, Patent Document 1)

JP 2010-267422 A

  However, such organic paints have a problem that the coating film is easily damaged, and it is desired to reduce the adhesion of dirt and to improve the ease of wiping off the adhered substances, that is, to further improve the non-adhesiveness and the cleaning property. It had been.

  Therefore, in view of the above-mentioned problems, the present invention has a common object to provide a cooking utensil that has high hardness and is not easily scratched and has non-adhesiveness to which dirt is difficult to adhere, and that is easy to wipe off dirt and has excellent cleanability. And

  In the invention of claim 1, by forming a ceramic layer mainly composed of granules, a film having non-adhesiveness and water repellency is formed on the surface of the base material, and it is highly hard and hardly scratches, so that dirt is attached. It is possible to provide cooking utensils that are difficult to perform. In addition, since the ceramic layer does not contain organic compounds, the hardness and non-adhesiveness do not decrease even at high temperatures, and dirt can be easily wiped off by the non-adhesive property. It also eliminates the problem of scratching and scratching. Moreover, even if a fingerprint adheres when a finger touches the surface of the coating film, the fingerprint can be easily wiped with dry wiping, and the filthy feeling can be wiped out.

  In the invention of claim 2, by forming a ceramic layer mainly composed of granules, a film having non-adhesiveness and water repellency is formed on the surface of the base material, and it is highly hard and hardly scratched, and dirt is attached. It is possible to provide cooking utensils that are difficult to perform. In addition, since the ceramic layer does not contain organic compounds, the hardness and non-adhesiveness do not decrease even at high temperatures, and dirt can be easily wiped off by the non-adhesive property. It also eliminates the problem of scratching and scratching. Even if the deposit placed on the surface of the coating is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide fixed on the surface of the coating is immersed in water in a cooled state after heating. Alternatively, it is possible to wipe off within 1 minute by simply dropping a neutral detergent into soaked water, so that the cleaning property as a cooking utensil can be remarkably improved.

  In the invention of claim 3, even if the deposit placed on the surface of the coating is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide fixed to the surface of the coating is cooled after heating. Since it falls by vibration in a state, the cleaning property as a cooking utensil can be further remarkably improved.

  In the invention of claim 4, by forming a ceramic layer mainly composed of granules, a film having non-adhesiveness and water repellency is formed on the surface of the base material. It is possible to provide cooking utensils that are difficult to perform. In addition, since the ceramic layer does not contain organic compounds, the hardness and non-adhesiveness do not decrease even at high temperatures, and dirt can be easily wiped off by the non-adhesive property. It also eliminates the problem of scratching and scratching. Also, even if oil stains fall off from the object to be cooked to the surface of the paint film, the oil stains that adhere to the surface of the paint film can be removed without using a cleaning aid in the cold state after heating. The cleanability as a tool can be remarkably improved.

  According to the first aspect of the present invention, it is possible to provide a cooking utensil that has high hardness, is not easily scratched, has non-adhesiveness to which dirt is difficult to adhere, is easy to wipe off dirt, has excellent cleanability, and has a clean sense.

  According to the invention of claim 2, it is possible to provide a cooking utensil that has high hardness and is hard to be scratched and has non-adhesiveness to which dirt is difficult to adhere, which is easy to wipe off dirt and excellent in cleanability. Property can be remarkably improved.

  According to invention of Claim 3, the cleaning property as a cooking appliance can be improved further notably.

  According to the invention of claim 4, it is possible to provide a cooking utensil having high hardness and being hard to be scratched and having non-adhesiveness to which dirt is difficult to adhere, easily wiping off the dirt and having excellent cleaning properties, and further cleaning as a cooking utensil. Property can be remarkably improved.

It is a perspective view of the state where the door of the microwave oven common to each embodiment of the present invention was opened. It is a perspective view of the square plate as a cooking appliance attached to a microwave oven same as the above. It is a perspective view of the baking pan as a cooking appliance attached to a microwave oven same as the above. It is a perspective view of the grill net as a cooking appliance attached to a microwave oven same as the above. It is an expanded sectional view of the coating film by the same application same as the above. It is an expanded sectional view of the coating film by 2 times application same as the above. It is an expanded sectional view of the coating film in 1st embodiment of this invention. It is an expanded sectional view of the coating film in 2nd embodiment of this invention.

  Hereinafter, preferred embodiments of the heating cooker according to the present invention will be described in detail with reference to the accompanying drawings.

(1) Basic Configuration Common to Each Embodiment FIG. 1 shows a microwave oven 1 common to each embodiment. In the microwave oven 1 as a cooking device, a cooking chamber 11 having only a front surface (front) opened in a cooking chamber 2 serving as a main body, and an object to be cooked (not shown) is accommodated in the cooking chamber 11. It is configured. On the inner wall surface of the cooking chamber 11, a coating film 12 made of an inorganic material not containing an organic compound mainly composed of fine powder of alumina ceramic is applied and formed over the entire surface. That is, the coating film 12 is formed on all surfaces except the opening surface of the cooking chamber 11, that is, the bottom surface, the left surface, the right surface, the back surface, and the top surface. Moreover, the door 16 which covers the front surface of the cooking chamber 11 is provided in the front side of the heating cooking chamber 2 so that opening and closing is possible, and the coating film 12 is formed also on the front edge surface of the heating cooking chamber 2 which contacts the inner edge surface of the door 16. doing.

  Further, for example, a heater 8 as a heating unit is provided in the upper part of the cooking chamber 11, and a microwave generator 9 as another heating unit is incorporated in the cooking chamber 2. It becomes the structure which heats the to-be-cooked object accommodated in the cooking chamber 11 with the radiant heat of this and the microwave from the microwave generator 9. FIG.

  In the cooking chamber 11 of the microwave oven 1, as a cooking utensil for storing the food to be cooked, the square plate 13 shown in FIG. 2, the baking plate 14 shown in FIG. 3, and the baking shown in FIG. 4. A net 15 or the like can be attached. As a cooking dish, each of the square dish 13 and the grilled plate 14 is formed in a tray shape by a flat bottom portion 4 on which an object to be cooked is placed and a frame-like portion 5 rising from the periphery of the bottom portion 4. In addition, the grill 15 is formed by combining a plurality of rods, and includes a net-like placement unit 6 on which an object to be cooked is placed, and a leg 7 that extends below the placement unit 6. . A coating film 12 made of an inorganic material not containing an organic compound mainly composed of fine powder of alumina ceramic is also formed on the surface of these cooking utensils. Also, the coating film 12 is formed on the inner surface facing the cooking chamber 11 with respect to the door 16 of the cooking chamber 11.

  As shown in FIG. 5, the coating film 12 serving as a ceramic layer is obtained by applying a liquid 22 in which an inorganic material not containing an organic compound mainly composed of fine powder 21 of alumina ceramic is dissolved to the surface of a base material 31. It is formed by drying. The fine powder 21 of alumina ceramic has a particle size of 100 nm or less, preferably 50 nm or less. As the liquid 22 for dissolving it, a liquid which does not leave an organic compound after evaporation, for example, water, alcohol or other suitable solvent is used.

  In forming the coating film 12, in addition to the one-time coating as shown in FIG. 5, the two-time coating as shown in FIG. 6 is possible. Although details will be described later, the formation of the coating film 12 is adjusted to a thickness of 10 to 50 μm if it is applied once as shown in FIG. 5. Moreover, if it is a 2 times coating which consists of the base coating film layer 32 and the top coating layer 33 as shown in FIG. 6, it will apply twice with the thickness of 20-25 micrometers, respectively.

  According to this embodiment, alumina ceramic fine powder 21 is the main component on the inner wall surface of the cooking chamber 11, the surface of the cooking utensil (square plate 13, grilled plate 14, grilled net 15), and the inner surface of the door 16. By forming a coating film 12 of an inorganic material that does not contain an organic compound, the surface hardness of these parts is increased to improve wear resistance, and the non-adhesiveness to dirt is increased to make it difficult to attach dirt. The attached dirt can be easily wiped off, and it becomes possible to realize a heating cooker or cooking utensil excellent in cleanability.

  Although the microwave oven 1 has been described in the present embodiment, the coating film 12 made of an inorganic material that does not contain an organic compound mainly composed of alumina ceramic fine powder 21 is used for cooking in other cooking devices such as a microwave oven. It can also be formed on the inner wall surface of the room and the inner side surface of the door, and also on the inner wall surface of the grill part of the IH cooking heater, the inner side surface of the door, and the surface of a saucer or a grill net that is a cooking utensil in the grill. It can also be formed. Here, the main body forming the cooking chamber of the microwave oven or the grill portion of the IH cooking heater corresponds to a cooking chamber that accommodates the food to be cooked and heats it.

  When a cross-cut test was performed on the square plate 13 of the example coated with alumina ceramic powder (fine powder 21) having an average particle size of 10 nm, peeling of the coating film did not occur even with a 4H pencil. Further, a drop test of 0.1 ml and 0.2 ml water droplets was performed, but no water droplet spread was observed. On the other hand, for the square plate 13 coated with the silicon-based paint of the comparative example, peeling of the coating film was observed with a pencil having a hardness of H. Moreover, some spread of water droplets was observed.

  Eggs, sauces, ketchup, sugar, salad oil, soy sauce, vinegar, lemon, butter, sauteed grilled meat are hung on a square plate 13 and placed in the cooking chamber 11 of the microwave oven 1 at 300 ° C. for 30 minutes. After washing with a neutral detergent, a test of wiping with a towel was performed. As a result, the square dish 13 of the example coated with alumina ceramic powder could be wiped cleanly without any traces. On the other hand, in the case of the square plate 13 of the comparative example, the soy sauce and butter could be wiped cleanly, but a trace was left about the egg, sauce, sugar, salad oil, vinegar, lemon, and grilled meat. And in Ketchup, the trace was conspicuous.

  Thus, in the case of the square dish 13 of the present embodiment, it was confirmed that the surface hardness was strong, the dirt was hardly attached, the attached dirt was easily wiped off, and the cleaning property was excellent.

(2) 1st embodiment Next, 1st embodiment which actualized the said embodiment is described. In the following embodiments, descriptions overlapping with the above embodiments are omitted.

In FIG. 7, the base material 31 is made of a metal such as aluminum or iron, or a surface-treated steel plate such as aluminum plating or galvanization. A rough surface 41 having a surface roughness of 1.5 to 6.5 μm, preferably 3 to 5 μm, is formed on the surface of the base material 31. The surface of the rough surface 41 is silicon-based (SiO) or alumina-based (AL ₂ O ₃ ) 1000 nm or less, preferably 100 nm or less, mainly composed of fine powder 21 as an inorganic component, and a film thickness of 5 to 35 μm. The base coating layer 32 having a thickness of 10 to 25 μm is preferably applied, and the fine powder 21 as an inorganic component having a silicon-based or alumina-based particle size of 1000 nm or less, preferably 100 nm, is formed on the upper surface of the base coating layer 32. The ceramic film layer having a film thickness of 8 to 65 μm, preferably 15 to 50 μm is formed by coating the top coating layer 33 having a film thickness of 3 to 30 μm, preferably 2 to 25 μm. The coating film 12 is formed on the surface 31.

  Before painting, it is possible to roughen the painted surface of the base material with sand blast, alumina blast, chemical etching, etc., and paint the rough surface to adhere the coating film by the anchor effect between the rough surface and the coating film It is known as a general processing method. However, in the case of the coating film 12 mainly composed of the fine powder 21 as an inorganic component of 1000 nm or less, preferably 100 nm or less as in the present invention, the surface roughness of the base material 31 to be coated is very important and is too fine. Even if it is too rough, the adhesiveness is lowered. In the experiment, a rough surface 41 having a surface roughness of the base material 31 of 1.5 to 6.5 μm, preferably 3 to 5 μm, is formed by blasting, and the base coating layer 32 and the top coating are formed on the rough surface 41. The coating layer 12 is formed with the film layer 33, and a tape peeling test (inspecting peeling of the coating film when the cellophane tape is applied and the cellophane tape is abruptly removed) or a cross-cut tape peeling test (with a cutter) A 1 mm square cell was cut into 100 mm and a cellophane tape was attached, and the cell coating was peeled off when the cellophane tape was rapidly removed. As a result, it was confirmed that there was no peeling of the coating film 12 in both tests.

  Further, the inside of the cooking chamber 2 serving as an oven chamber is composed of at least five elements of a ceiling surface, a left side surface, a right side surface, a bottom surface, and a back surface by a plate-shaped base material 31, which is not illustrated. However, the end portions of these plate-like elements form a box-like housing that is fixed to each other by a fastening member such as welding, caulking, or screwing.

  Here, when the inner surface of the cooking chamber 2 is blasted after being made into a housing, when performing the blasting process to the inner surface where the cooking chamber 2 is deep, the concavo-convex portion and the hole end portion formed in advance on the inner surface, and There is a problem that the surface of the joint surface between the elements is not sufficiently blasted and roughening is insufficient. Therefore, in this embodiment, the surface roughness as described above is 1.5 to 6. before the ends of the elements constituting the cooking chamber 2 are joined and fixed by welding, caulking, screwing, or the like. By performing blasting to form the rough surface 41 of 5 μm, preferably 3 to 5 μm, the effect of preventing partial roughening when the housing is blasted can be obtained.

  In addition, when the above-described elements are joined and fixed as the cooking chamber 2, the rough surface 41 formed on the surface of the base material 31 may be lost by an external force, and the surface of the base material 31 may be removed. There is a possibility that dirt may adhere to the film, and there is a risk that it becomes a cause of lowering adhesion after the coating film 12 is applied. So, in this embodiment, after fixing the edge part of each element which comprises the heating cooking chamber 2, before coating the coating film 12 on the surface of the base material 31, it blasts again and the inside of the heating cooking chamber 2 is carried out. By roughening each surface with an uneven rough surface 41 of 1.5 to 6.5 μm, preferably 3 to 5 μm, it becomes possible to avoid such a risk of reducing adhesion.

  In FIG. 7, the base coating layer 32 may be colored by adding a coloring pigment 36 of an inorganic component such as Cr, Mn, or Fe to the base coating layer 32. Since the presence or absence of coating on the surface of the base material 31 can be easily understood by the colored pigment 36, it is possible to improve the problem of forgetting to paint during the work of the base coating film layer 32 or partially reducing the film thickness. Similar coloring is conventionally known, but the heat resistance of the coating film 12 can be maintained by using the coloring pigment 36 of an inorganic component having particularly high heat resistance. In particular, in the present invention, the management of the film thickness is an important point for ensuring the performance, and it is an effective policy that can be visually recognized when the base coating layer 32 is coated when the film thickness is too thick or too thin. Become. In addition, the use of a black-colored color pigment 36 is preferable because the stain is less noticeable during long-term use.

  In FIG. 7, the color pigment 36 is added to the top coating layer 33 as well as the base coating layer 32. The coloring pigment 36 added to the top coating layer 33 may be less than that of the base coating layer 32, or the pigment may not be added to the top coating layer 33. By making the film layer 33 transparent, the interface between the base coating layer 32 and the top coating layer 33 can be easily observed. In particular, in the present invention, as described above, the management of the film thickness is an important point for ensuring the performance. Therefore, if the top coating layer 33 is made transparent, the thickness of the top coating layer 33 can be reduced when it is applied. If it is too thick or too thin, it can be visually recognized and is an effective measure. Furthermore, when the film thickness of the top coating layer 33 is thin, roughness occurs on the surface of the coating film 12. Conversely, if the film thickness of the top coating layer 33 is too thick, the transparency of the coating film 12 becomes strong. As a result, the film thickness of the top coating layer 33 and the total coating thickness of the coating layer 12 including the base coating layer 32 can be visually confirmed. Further, the surface of the coating film 12 becomes a transparent glossy surface, and there is an effect of improving the appearance quality.

  In FIG. 7, if a bright component pigment 37 such as mica particles or aluminum particles is added to the top coating layer 33, the top coating layer 33 glitters in a granular form, and the base coating layer 32 and the top coating layer 33 are further divided. The boundary surface can be observed more easily. Further, the coating film 12 has a metallic or pearly appearance, and the appearance quality is further improved.

  Regarding the formation of the coating film 12, here, when the film thickness of the base coating film layer 32 is 35 μm or less, preferably 25 μm or less, when the coating film 12 is heated in the baking process or actually used as the microwave oven 1. With this heating and cooling, the formation of fine cracks generated on the surface of the coating film 12 is suppressed from the difference in thermal expansion between the metal as the base material 31 and the ceramic layer as the coating film 12.

  When the film thickness of the base coating film layer 32 is 35 μm or more, the crack width generated on the surface of the coating film 12 becomes large (3 μm or more), the dirt enters the crack, the burnt dirt bites, and the carbonized dirt becomes difficult to wipe off. . Also, when the crack width becomes wider (more than 5μm), and more cracks (more than 1 / 1mm square), the end of the crack is hung, cellophane tape is applied, and cellophane tape is peeled off rapidly In the tape peeling test, it was confirmed that the ceramic particles were peeled in a granular form. As a result of the experiment, the film thickness of the base coating layer 32 was 35 μm or less, preferably 25 μm or less, resulting in less cracking. Further, when the base coating film layer 32 is too thin, the masking of the base material 31 is worsened and the base material 31 may be seen through. Therefore, in the experiment, 5 μm or more, preferably 10 μm is good in appearance. It became a result.

  In addition, in order to suppress the occurrence of cracks and to suppress the granular peeling phenomenon of ceramics in the tape peeling test, the film thickness of the top coating layer 33 is 30 μm or less, preferably 25 μm or less. It was an effective result. Moreover, if the film thickness of the top coating layer 33 is too thin, the concealing property of the base coating layer 32 is deteriorated, and if the base coating layer 32 is partially exposed on the surface, the surface of the coating film 12 is roughened. In addition to reducing the gloss, it also causes a decrease in water repellency. In the experiment, in the case of the fine powder 21 having a particle size of 1000 nm to 100 nm, the base coating layer 32 is well concealed by setting the average thickness of the top coating layer 33 to 3 μm or more, preferably 5 μm or more, As a result, the roughness of the surface of the coating film 12 can be suppressed.

  According to the above results, the total film thickness of the base coating film layer 32 and the top coating film layer 33 is 8 to 65 μm, preferably 15 to 50 μm, so that there are few cracks on the surface of the coating film 12 and There is no granular peeling, and a good appearance with no roughness or lack of gloss on the surface of the coating film 12 can be secured.

  Conventionally, when used in a heating cooker such as a microwave oven 1 or a microwave oven with an oven heating function, there has been a problem that dirt of the object to be cooked scattered in the cooking chamber 2 during cooking heating is scattered and adhered. In order to easily remove such dirt, the inside of the cooking chamber 2 and the cooking utensils are coated with organic compounds such as silicon and fluorine, but they are not sticky or water repellent and are stuck. There was a trouble of rubbing off the dirt with a neighborhood or detergent.

  However, in the present embodiment, the non-adhesive layer is formed by forming the ceramic coating 12 made of alumina ceramics having a particle size of 1000 nm or less, preferably 100 nm or less, mainly composed of fine particles 21 made of nano-scale and high hardness. And a water-repellent film are formed, and it is possible to provide a cooking chamber 11 and a cooking utensil that are less likely to be scratched and are less likely to adhere to dirt. In addition, since the coating film 12 is mainly composed of ceramics and does not contain organic compounds such as silicon, fluorine, PES, and acrylic, the organic compound is softened and has a hardness even at a high temperature exceeding 230 ° C. as in the prior art. Even if the food to be cooked or seasoning adheres and burns by heating, the non-adhesiveness can easily wipe off the dirt, so the dirt is forcibly removed. The problem of scratching can also be solved.

  By the way, as a method of generating the ceramic coating film 12, the method of adding ceramic powder to an organic paint exposes the organic compound to the surface, and the above effect cannot be obtained. In the method of forming ceramics by spraying, the strength of the base material 31 is a problem, and the sheet metal forming the cooking chamber 11 does not have strength. In addition, it is difficult to form a nano-sized ceramic powder layer having good stain resistance and water repellency. Therefore, in each embodiment of the present invention, the sol-gel method is selected as a means for generating a ceramic thin film as the coating film 12.

  Specifically, the base material 31 is first heated to 60 ° C., then the base coating layer 32 is applied on the surface of the base material 31 and heated at 60 ° C. for 10 minutes to apply the top coating layer 33. . After coating the top coating layer 33, the temperature is raised to 120 ° C or 150 ° C for 3 minutes or more, preferably 5 minutes or more, and 120 to 250 ° C for 5 minutes or more, preferably 150 to 220 ° C for 15 minutes or more. The coating film 12 which becomes a ceramic layer is formed by heating and baking. The heating and baking temperature here is set lower than the maximum cooking temperature in the cooking chamber 11 during cooking, and the base coating layer 32, the top coating layer 33, or the base material 31, The thing whose heat-resistant use temperature of an ingredient is below the above-mentioned maximum heating temperature at the time of cooking is selected. In this way, when cooking in the microwave oven 1, the temperature is equal to or higher than the firing temperature for forming the coating film 12, and is equal to or lower than the heat resistant use temperature of the components of the base coating layer 32 and the top coating layer 33 or the components of the base material 31. The heating temperature can be the maximum temperature at which cooking is possible.

  At the time of baking the coating film 12, it plays a role of dehydrating moisture in the coating film 12 and activating molecular bonds. However, as a result of experiments, it has been found that the surface of the coating film 12 is cracked when the temperature is rapidly increased. It was. Generation of cracks can be suppressed by slowly raising the time required to reach the firing temperature (120 ° C. or 150 ° C.) over 3 minutes, preferably over 5 minutes.

  Further, the subsequent firing temperature is set to 120 to 250 ° C., preferably 150 to 220 ° C., because if the temperature is too low, the dehydrating action is poor, and if it is too high, it causes surface cracks. Furthermore, if the firing time is short, dehydration and molecular bonding will not proceed sufficiently, and by heating and firing for 5 minutes or more, preferably 15 minutes or more, the adhesion of the ceramic layer is improved, and granular peeling in the tape peeling test is performed. I was able to lose it.

  The coating film 12 completed by firing has the heat resistance of ceramics, withstands a temperature of 120 to 250 ° C. higher than the firing temperature during cooking, and the heat resistance temperature of the ceramics (coating film 12) or the base material 31 Withstands high temperatures of about 400 ° C (in the case of iron-based steel plates) up to the heat-resistant temperature. If the base material 31 is made of heat-resistant stainless steel or heat-resistant steel plate such as incoloy, the temperature can be raised to about 600 to 800 ° C. (up to the heat resistance temperature limit of either the ceramic or the base material). In addition to cooking dishes that can withstand the heating of the microwave oven 1 at, for example, 250 to 800 ° C., because of the main body, there is no generation of gas due to dissolution of organic compounds. Can be applied to the inner surface of the cooking chamber 11, the inner surface of the glass of the door 16 (base material is heat-resistant glass), the surface of the ceramic plate (example of the microwave oven 1) on the bottom surface of the cooking chamber 11, and cooking utensils for gas / electric stove is there.

  In a heating cooker equipped with an oven function such as the microwave oven 1 or an electronic oven, the internal temperature at the time of heating or the operating temperature of the cooking utensil used in the internal chamber is 250 ° C. or higher, 400 such as 300 to 350 ° C. Generally it is set to below ℃. 250 ° C. is a temperature necessary for oven heating performance, and it is preferable from the viewpoint of cooking performance that the temperature can be further increased. However, the upper limit is set to 400 ° C. or less due to restrictions on heat-resistant temperature as a cooking utensil.

  By the way, when the cooking utensil is coated with a fluorine-based paint as in the background art, the heat resistance temperature (softening) of fluorine is about 250 ° C., and when it is coated with a heat-resistant silicon-based paint, the temperature is about 400 ° C. or less. Although it is set as the upper limit of normal use temperature in cooking utensils, when such an upper limit of use temperature is exceeded, paints made of organic compounds may lead to softening, dissolution (decomposition), smoke generation, gas generation, etc. There is a risk of adverse effects on small animals such as small birds and the human body due to gas leaked from. For this reason, in the case of a cooking utensil coated with a paint made of an organic compound, the upper limit of the use temperature is limited to 400 ° C. or lower, preferably 350 ° C. or lower.

  However, the temperature control of the heater 8 or the microwave generator 9 as the heating means fails, or the heating cooking chamber 2 falls into abnormal heating for some reason, and cooks above the heat resistant temperature of the paint or above 400 ° C. There was concern about the gas generation when the instrument was heated.

  On the other hand, the coating film 12 of this embodiment is made of silicon or alumina as a main component on the surface of a base material 31 made of a metal such as aluminum or iron, or a surface-treated steel plate such as aluminum plating or galvanization. In the case of two coatings comprising the base coating layer 32 and the top coating layer 33, the color pigment 36 contained in the top coating layer 33 is an inorganic component. Therefore, almost no gas is generated from the coating film 12 during actual use, and it can be used safely. In addition, even if the microwave oven 1 breaks down and becomes abnormally heated, or when cooking utensils are used in a gas or electric stove and are heated beyond the operating temperature limit, There is almost no gas generation, and safety is improved.

  Further, in the case of conventional organic compound paints, it is difficult to use at a temperature exceeding the firing temperature (fluorine decomposes and dissolves at about 400 ° C. and generates gas), and the firing temperature needs to be increased. However, in this embodiment, since the generation of ceramics by the sol = gel method is selected, the firing temperature can be lowered to about 220 ° C. or less, and moisture contained mainly in the coating film 12 evaporates during heating and firing. No toxic gas is generated, and there are no safety and environmental problems. In addition, since it can be fired at a lower temperature than conventional, the energy consumption of the firing furnace can be reduced.

  Furthermore, as a feature of ceramics, there is no red heat at high temperature, infrared radiation and absorption efficiency is high, and when used as a cooking utensil in a cooking plate or container, heat absorption is improved at high temperature. Moreover, when it uses for the inner surface of the cooking chamber 2, the thermal radiation efficiency into the cooking chamber 2 from the heater 8 provided in the outer surface of the microwave oven 1 improves, and heating efficiency improves. If applied to both the inner surface of the cooking chamber 2 and the cooking dishes and containers used in the cooking chamber 2, by the synergistic effect of improving the heat radiation from the heater 8 and improving the heat absorption of the cooking dishes and containers, It becomes possible to improve cooking performance.

  By the way, cooking dishes and containers as cooking utensils have a glossy surface and a smooth surface, so that when touching the surface with a finger, there is a problem that the sebum of the finger adheres and the back of the fingerprint remains. . If fingerprints (fingerprints) adhere after cleaning, there is a sense of filth, which is undesirable. There is also a method of forming a transparent coating on the surface of the base material 31 for preventing fingerprint adhesion, but the practical range is limited at a heat resistant temperature of about 200 ° C. or less, and it cannot be used for an oven at 230 to 250 ° C. In addition, when a product is displayed at a store or when a customer touches a plate or container, the fingerprint remains attached, and the next customer who sees the product feels unclean and becomes a major problem in sales. There is.

  Therefore, in the present embodiment, the surface of the cooking utensil such as the square plate 13, the grill plate 14, and the grill net 15 or the base material 31 of the heating cooking chamber 2 is made of ceramic particles such as silicon or alumina, and the particle size is reduced. When the coating film 12 using the fine powder 21 as particles of 1000 nanometers to 100 nanometers or less is formed, and the finger touches the painted surface, there is no fingerprint adhesion, and when it is adhered, the fingerprint is wiped with an empty wipe. By selecting a ceramic component that can be wiped off as the fine powder 21 of the coating film 12, even if a fingerprint is attached, the ceramic component can be easily wiped off and the above problem can be solved.

  Thereby, in addition to the microwave oven 1 shown in FIG. 1, a microwave oven having other oven functions, a microwave oven having a grill heating function, a cooking device such as a fish roaster, and the heating cooker are attached. In the cooking utensils (square plate 13, grilling plate 14, grilling net 15), the heat resistance of ceramics and the non-adhesiveness (hard to get dirty) of the fine nano-sized film are compatible, and the conventional silicon and fluorine Like coating, organic compound dissolves and decomposes during abnormal heating such as when equipment breaks down, and harmful gases are generated. It is non-adhesive at low temperatures, but softens at high temperatures. The disadvantage that non-adhesiveness deteriorates can be eliminated. In addition, since the ceramic film made of fine powder 21 is the main film, it has high hardness and is not easily scratched. Even when the surface of the coating film 12 is scorched by high-temperature heating of the microwave oven 1, the carbide is easily removed to prevent scratching. it can.

  Ceramics has high heat radiation efficiency, and heat radiation from the heater 8 provided on the outer surface of the cooking chamber 11 to the inner surface (bottom surface, left side surface, right side surface, back surface, top surface) of the cooking chamber 11 as an oven cabinet. The cooking performance as the microwave oven 1 is improved. Moreover, since the coating film 12 can ensure non-adhesiveness even at high temperatures, for example, kitchen paper can be placed on a cooking dish (corner plate 13 or grilled plate 14) for cooking, or oil can be placed on the cooking dish for cooking. There is no need to take care of cleaning up and so on, and you can cook healthy without using oil or reducing oil.

  The nano-ceramic coating film 12 is preferably applied to the surface of the cooking utensil housed in the cooking chamber 11 as well as the inner surface of the cooking chamber 11. Conventionally, the contact between both the cooking chamber 11 and the cooking utensil is likely to be soiled or the seasoning is burnt, and the burning is solidified in the gap and the cooking utensil sticks into the cooking chamber 11, and cooking is performed from the cooking chamber 11. Although it becomes difficult to take out the utensil, the cooking utensils can be easily attached and detached even when the seasoning or the like in the gap is burnt by high temperature heating by coating the both contact portions of the utensil.

  As described above, the cooking utensil in the present embodiment is a coating film as a ceramic layer mainly composed of silicon-based or alumina-based ceramic particles (fine powder 21) on the surface of the base material 31 made of metal or surface-treated steel. As a fine powder 21 of the coating film 12, a ceramic component that hardly generates gas in a range where the heat receiving temperature is 250 ° C. or more and 400 ° C. or less or the heat resistance temperature of the coating film 12 or the base material 13 is formed. Selected.

  Here, “there is almost no gas generation” means that there is no generation of gas such as heat decomposition gas or toxic gas from an aromatic solvent such as benzene or toluene, and it does not exceed the RoAS regulations. .

  In this case, by forming the ceramic coating film 12 mainly composed of the fine particles 21, a film having non-adhesiveness and water repellency is formed on the surface of the base material 31. A cooking utensil that is difficult to adhere can be provided. In addition, since the coating film 12 does not contain an organic compound, the hardness and non-adhesiveness do not decrease even at high temperatures, and the non-adhesive property can easily wipe off dirt. The problem of removing dirt and scratching is also eliminated. Therefore, it is possible to provide a cooking utensil that has high hardness and is hard to be scratched and has non-adhesiveness to which dirt is difficult to adhere, and that is easy to wipe off dirt and has excellent cleanability.

  Further, when the cooking utensil is actually used by heating so as not to impair the oven heating performance and not to exceed the normal use temperature in the cooking utensil, there is almost no gas generation from the coating film 12. In addition, even when subjected to heating exceeding the normal use temperature, there is almost no generation of gas as in the case of decomposition of the organic compound, so that a cooking utensil that can be used safely can be provided.

  Moreover, in this embodiment, when a finger touches the surface of the coating film 12 before cooking and heating, a ceramic component that does not have fingerprints attached or that can be wiped off with an empty wipe is applied to the coating film 12. The fine powder 21 is selected. In other words, the ceramic component here has a particle size that is equal to or less than the particle size of the sebum component (fingerprint oil) before painting, and the size, width, and depth of the recess so that the sebum component does not catch after painting. The main component is ceramic particles (fine particles 21) in which the coating film 12 having a smooth surface is formed by gaps or the like.

  Also in this case, as described above, it is possible to provide a cooking utensil that has high hardness and is not easily scratched and has non-adhesiveness to which dirt is difficult to adhere, which is easy to wipe off dirt and has excellent cleanability. Moreover, even if a fingerprint adheres when a finger is touched on the surface of the coating film 12, the fingerprint can be easily wiped with dry wiping, and the unclean feeling can be wiped out.

  In addition, in the present embodiment, the surface of the base material 31 made of metal or surface-treated steel is mainly composed of fine powder 21 as an inorganic component having a silicon-based or alumina-based particle size of 1000 nm or less, and the film thickness is 5 to 5. A base coating layer 32 having a thickness of 35 μm and a top coating layer 33 having a film thickness of 3 to 30 μm, mainly composed of a fine powder 21 as an inorganic component having a silicon-based or alumina-based particle size of 1000 nm or less. A ceramic layer having a thickness of 8 to 65 μm is formed as the coating film 12 by coating.

  In this case, by forming the ceramic coating film 12 mainly composed of the fine particles 21 having a particle size of 1000 nm or less, a film having non-adhesiveness and water repellency is formed on the surface of the base material 31, and the scratches are high in hardness. It is possible to provide the cooking chamber 11 and the cooking utensil of the microwave oven 1 that are less likely to be attached and that are less likely to adhere dirt. In addition, since the coating film 12 does not contain an organic compound, the hardness and non-adhesiveness do not decrease even at high temperatures, and the non-adhesive property can easily wipe off dirt. The problem of removing dirt and scratching is also eliminated. Therefore, it is possible to provide the cooking chamber 11 and the cooking utensil of the microwave oven 1 having high hardness and being hard to be scratched and having non-adhesiveness to which dirt is difficult to adhere, easy to wipe off dirt and excellent cleanability.

  Further, by making the thickness of the base coating film layer 32 35 μm or less and the thickness of the top coating layer 33 30 μm or less, the occurrence of fine cracks generated on the surface of the coating film 12 is suppressed, and the tape peeling The granular peeling phenomenon of ceramics in the test can be suppressed, and by making the thickness of the base coating film layer 32 to be 5 μm or more, the base material 31 can be concealed and a good appearance can be obtained. By setting the film thickness of the layer 33 to 3 μm or more, it is possible to suppress the roughness of the surface of the coating film 12 while concealing the base coating layer 32 and maintaining a good appearance.

  Further, in the present embodiment, the base coating layer 32 is colored by adding an inorganic component pigment 36. If it carries out like this, it will become easy to understand the presence or absence of the coating with respect to the base material 31 surface, and if a film thickness is too thick at the time of the coating of the base coating film layer 32, it can visually recognize. Moreover, the heat resistance of the coating film 12 can be maintained.

  In this embodiment, the amount of the color pigment 36 added to the top coating layer 33 is set to be smaller than the amount of the color pigment 36 added to the base coating layer 32, or the color pigment is added to the top coating layer 33 otherwise. The top coating layer 33 is formed transparently.

  In this case, by making the top coating layer 33 transparent, the interface between the base coating layer 32 and the top coating layer 33 can be easily observed, and the film thickness is too thick when the top coating layer 33 is applied. Or when it is too thin. Furthermore, when the film thickness of the top coating layer 33 is thin, roughness occurs on the surface of the coating film 12, and if the film thickness of the top coating layer 33 is too thick, the transparency of the coating film 12 becomes strong. Thus, the film thickness of the top coating film layer 33 and the film thickness of the coating film 12 including the base coating film layer 32 can be visually confirmed. Moreover, the surface of the coating film 12 becomes a transparent glossy surface, and the appearance quality is improved.

  In the present embodiment, the bright component pigment 37 is added to the top coating layer 33 to make the top coating layer 33 have a metallic or pearly appearance. Thereby, the top coating layer 33 glitters in a granular form, and the interface between the base coating layer 32 and the top coating layer 33 can be observed more easily. Further, the appearance quality of the coating film 12 is further improved.

  Moreover, in this embodiment, after the top coating layer 33 is applied, the temperature is increased to 120 ° C. or 150 ° C. over 3 minutes, and is heated and fired at 120 to 250 ° C. for 5 minutes or more to form the coating film 12 as a ceramic layer. And the heating temperature that is equal to or higher than the heat-baked temperature at the time of cooking and less than the heat-resistant use temperature of the component of the base coating layer 32 and the top coating layer 33 or the component of the base material 31. It is said.

  In this case, generation of cracks on the surface of the coating film 12 can be suppressed by increasing the temperature to 120 ° C. or 150 ° C. over 3 minutes after the top coating layer 33 is applied. Moreover, the adhesiveness of the coating film 12 improves by heating and baking at 120-250 degreeC for 5 minutes or more after that, and the granular peeling in a tape peeling test can be eliminated. The coating film 12 completed by firing can withstand temperatures higher than the firing temperature as long as it is below the heat-resistant use temperature of the components of the base coating layer 32 and the top coating layer 33, or the components of the base material 31, and is an organic compound. There is no generation of gas due to the dissolution of. In addition, since only moisture is evaporated during firing, no toxic gas is generated, and there is no problem in terms of safety, environment, and firing is possible at low temperatures, so that the energy consumption of the firing furnace can be reduced.

  Moreover, in this embodiment, in the microwave oven 1 as a heating cooker provided with the heating cooking chamber 2 and the cooking utensils (square plate 13, grilling plate 14, grilling net 15), the coating film 12 as the ceramic layer described above is applied. It forms in the inner surface part of the heating cooking chamber 2, or the surface part of a cooking utensil.

  By doing in this way, the effect by having formed the coating film 12 can be applied also to the inner surface part of the heating cooking chamber 2, or the surface part of a cooking utensil.

  Furthermore, in this embodiment, in the microwave oven 1 as a heating cooker provided with the heating cooker 2 and the cooking utensil, the exposed surfaces of these heating cooking cabinet 2 and the cooking utensil are a base material made of metal or surface-treated steel. An uneven rough surface 41 having a surface roughness of 1.5 to 6.5 μm is formed on the surface 31, and the coating film 12 is formed on the uneven rough surface 41.

  By doing in this way, the coating film 12 does not peel easily from the base material 31, and the adhesiveness of the base material 31 and the coating film 12 can be improved.

  The cooking chamber 2 of the present embodiment is composed of five elements of a ceiling surface, a left side surface, a right side surface, a bottom surface, and a back surface by a base material 31, and the end portions of these elements are fixed. The uneven rough surface 41 is formed on the surface of the base material 31 before the elements are fixed.

  In this case, after fixing the end portions of each element to be the heating cooker 2, when trying to form the rough surface 41 on the inner surface, roughening may be insufficient, By forming the uneven rough surface 41 on the surface of the base material 31 before fixing, the lack of roughening can be solved.

  Moreover, in this embodiment, the uneven | corrugated rough surface 41 is again formed in the surface of the base material 31 before coating the coating film 12 after fixing each element used as the heating cooking chamber 2. As shown in FIG.

  Thus, after fixing each element which comprises the heating cooking chamber 2, before coating the coating film 12 on the surface of the preform | base_material 31, the surface is roughened by the rough surface 41 again, and coating is carried out. It is possible to avoid the risk of reducing the adhesion after the film 12 is applied.

(3) Second Embodiment Next, a second embodiment of the present invention will be described. As shown in FIG. 8, in this embodiment, two coats 12 of the base coat layer 32 and the top coat layer 33 shown in the first embodiment are formed in one coat. The coating film 12 is formed on the surface of the base material 31 as a ceramic layer having a lower limit of 8 μm or more, preferably a lower limit of 15 μm or more and an upper limit of 65 μm or less, preferably an upper limit of 50 μm or less. Also in this case, the surface cracks of the coating film 12 are reduced, granular peeling in the tape peeling test is prevented, and the appearance is neither metallic nor pearl, but the basic functions such as cleanability of the cooking chamber 2 and cooking utensils are improved. Can be achieved.

  Alternatively, the entire coating film 12 may be colored by adding a color pigment 36 of an inorganic component such as Cr, Mn, or Fe to the coating film 12. Since the presence or absence of coating on the surface of the base material 31 can be easily understood by the colored pigment 36, it is possible to improve the problem of forgetting to apply the coating film 12 or partially reducing the film thickness. Similar coloring is conventionally known, but the heat resistance of the coating film 12 can be maintained by using the coloring pigment 36 of an inorganic component having particularly high heat resistance. In particular, in the present invention, the management of the film thickness is an important point for ensuring the performance, and it is an effective measure that can be visually recognized when the film thickness is too thick or too thin when the coating film 12 is applied. In addition, the use of a black-colored color pigment 36 is preferable because the stain is less noticeable during long-term use. Other configurations are the same as those in the first embodiment, but the uneven rough surface 41 as in the second embodiment may be formed on the surface of the base material 31.

  Thus, in the present embodiment, the surface of the base material 31 made of metal or surface-treated steel is mainly composed of the fine powder 21 as an inorganic component having a silicon-based or alumina-based particle size of 1000 nm or less, and has a film thickness of 8 A ceramic layer of ˜65 μm is formed as the coating film 12.

  Also in this case, by forming the ceramic coating film 12 mainly composed of the fine particles 21 having a particle size of 1000 nm or less, a film having non-adhesiveness and water repellency is formed on the surface of the base material 31, and the hardness is high. It is possible to provide the cooking chamber 11 and the cooking utensil of the microwave oven 1 that are less likely to be scratched and less likely to be contaminated. In addition, since the coating film 12 does not contain an organic compound, the hardness and non-adhesiveness do not decrease even at high temperatures, and the non-adhesive property can easily wipe off dirt. The problem of removing dirt and scratching is also eliminated. Therefore, it is possible to provide the cooking chamber 11 and the cooking utensil of the microwave oven 1 having high hardness and being hard to be scratched and having non-adhesiveness to which dirt is difficult to adhere, easy to wipe off dirt and excellent cleanability.

  Further, in this embodiment, the pigment 36 is added to the coating film 12 for coloring. If it carries out like this, it will become easy to understand the presence or absence of the coating with respect to the base material 31 surface, and it can visually recognize when the film thickness is too thick at the time of coating of the coating film 12, or is too thin. Moreover, the heat resistance of the coating film 12 can be maintained.

  In addition to these characteristics, in this embodiment, the pencil hardness of the surface when not cooking is 4H or more, preferably 6H or more, and the heat receiving temperature of the coating film 12 when cooking by the microwave oven 1 is 230 ° C. or more, preferably At 250 ° C. or higher, the reduction in surface pencil hardness during heating is less than 1 H compared to that during non-cooking, preferably the pencil hardness does not decrease, and the silicon or alumina particle size is 1000 nm or less, preferably 100 nm or less. A ceramic layer in which the alumina ceramic particles (fine powder 21) are selected is formed as the coating film 12 on the surface of the base material 31. Further, the coating film 12 is configured so that the silicon-based or alumina-based inorganic component is 90% or more, preferably 95% or more. As a result, the pencil hardness of the surface of the coating film 12 is 6H or more in the initial stage of non-cooking (9H in the experiment), and since the main component is ceramics, even at temperatures of 230 ° C., 250 ° C., 300 ° C., 350 ° C. As a result of the experiment, the pencil hardness on the surface of the coating film 12 hardly decreases. When the base material 31 is iron or an aluminum-plated steel plate, the non-adhesion of the coating film 12 is maintained up to the heat resistant temperature limit of 400 ° C. The pencil hardness that can withstand the practical use was secured. By selecting Incoloy, Inconel, heat-resistant stainless steel, etc. with higher heat resistance as the base material 31, it is possible to withstand a practical heat-resistant temperature of 600 ° C. to 800 ° C. without reducing the hardness of the coating film 12 surface. It becomes.

  As a result, even if the food is placed on a cooking utensil (square plate 13, grill plate 14, grill net 15), put into the cooking chamber 11, and cooked at a high temperature of 230 ° C. or higher, When deposits such as soy sauce and ketchup burn on the surface of the coating film 12, it becomes possible to easily remove the burn.

  In addition, when soy sauce, sauce, and ketchup were heated at 350 ° C. and burned onto the coating film 12 on the surface of the cooking utensil, they could be easily removed by simply wiping them after cooling the burn. Furthermore, even when a spatula is used, the pencil hardness of the surface of the coating film 12 in this embodiment is 6 H or more, which is twice or more compared with 2H to 3H of a normal organic compound paint. There were no scratches and there was no degradation in performance even after repeated use.

  The experiment of this embodiment was performed in the cooking dish (for example, the baking plate 14) of the microwave oven 1, and the inside of the heating cooking chamber 2. Apply a commercially available sauce or ketchup as a deposit to the cooking surface of the cooking dish on which the coating film 12 is formed and the inner surface of the heating cooking chamber 2, and heat the interior of the heating cooking chamber 2 at 300 ° C. for 30 minutes. I burned the ketchup and cleaned it. As a result, in this embodiment, scorching (carbide) could be removed lightly by hand, but scoring could not be easily removed in the conventional product, and a clear difference could be confirmed. In addition, it was confirmed that the cooking dish was burned off by simply vibrating the cooking dish.

  Conventionally, when baking a cookie or the like at about 170 ° C., there has been a difficulty in that the baked cookie that is to be cooked adheres to the coating film due to the softening of the organic compound contained in the coating film. When the cooking dish or container (cooking utensil) was used, the food to be cooked did not stick to the coating film 12.

  In addition to cookies made from the above flour as the main ingredient, the adhering material includes any food to be cooked, such as egg-baked eggs made from eggs, and if the carbide can be removed lightly by hand or peeled off by vibration Good.

  Another experiment of this embodiment was similarly performed on the cooking pan of the microwave oven 1. The grill net 15 is placed on the cooking plate, the sword fish that is to be cooked is placed on the grill 15, and the grill sword fish is baked by grill heating by the heater 8 mounted on the upper surface in the heating cooking chamber 2 (Aki sword fish) The front side 25 minutes, followed by the back side 25 minutes). Next, another chicken to be cooked is placed on the grill 15 and baked in an oven at 250 ° C. for 40 minutes, and then heated in an oven (boiled at 350 ° C.) for 30 minutes. The oil that had fallen on the cooking plate was burnt onto the cooking plate, and then allowed to cool for 20 minutes.

  In the present embodiment, since the coating film 12 is formed on the surface of the cooking dish, oil stains adhering to the cooking dish soak the cooking dish in water, or drop a neutral detergent into the soaked water, It was confirmed that it could be removed by hand without using cleaning aids such as scrubbing brush, sponge, Scotch Bright (registered trademark), or cleanser.

  In addition, in common with each embodiment, when the film thickness of the coating film 12 increases, cracks are likely to occur in the coating film 12 due to a difference in thermal expansion between the base material 31 and the coating film 12 that is a ceramic layer. On the other hand, when the film thickness of the coating film 12 is reduced, the concealability of the base material 31 by the coating film 12 is lowered and the base material 31 can be seen through. Therefore, the film thickness is 8 to 65 μm, preferably 15 to 50 μm. However, since the inner back surface (opposite surface of the opening surface) of the heating cooking chamber 2 is difficult to receive light and has no hindrance in appearance even if the concealability is lowered, it is coated with a thinner film thickness than other parts. It is possible to form the film 12 and reduce the amount of paint used.

  Thus, in this embodiment, the coating film 12 as a ceramic layer mainly composed of silicon-based or alumina-based ceramic particles (fine powder 21) is applied to the surface of the base material 31 made of metal or surface-treated steel. In the cooked appliance, when the deposit placed on the surface of the coating film 12 is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide adhered to the surface of the coating film 12 in a cooled state after heating. The ceramic component is selected as the fine powder 21 of the coating film 12 so that it can be immersed in water or a neutral detergent is dropped into the soaked water and wiped off within 1 minute.

  That is, the ceramic component here has a particle size that is equal to or smaller than the particle size of the adhered food element before painting, and has a diameter, width, depth depression, or gap that does not catch the food element after painting. The main component is ceramic particles (microparticles 21) such that the coating film 12 having a smooth surface is formed.

  Also in this case, by forming the ceramic coating film 12 mainly composed of the fine particles 21, a film having non-adhesiveness and water repellency is formed on the surface of the base material 31. It is possible to provide a cooking utensil that makes it difficult to adhere. In addition, since the coating film 12 does not contain an organic compound, the hardness and non-adhesiveness do not decrease even at high temperatures, and the non-adhesive property can easily wipe off dirt. The problem of removing dirt and scratching is also eliminated. Therefore, it is possible to provide a cooking utensil that has high hardness and is hard to be scratched and has non-adhesiveness to which dirt is difficult to adhere, and that is easy to wipe off dirt and has excellent cleanability.

  Furthermore, even if the deposit placed on the surface of the coating film 12 is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide adhered to the surface of the coating film 12 is water in a cooled state after heating. Since it can be wiped off within 1 minute by simply immersing it in water or dropping a neutral detergent into the soaked water, the cleaning property as a cooking utensil can be remarkably improved.

  Moreover, in this embodiment, when the deposit | attachment mounted on the surface of the coating film 12 was carbonized by heating at 250 degreeC or more for 10 minutes or more, it adhered to the surface of the coating film 12 in the state cooled after heating. A ceramic component in which the carbide falls by vibration is selected as the fine powder 21 of the coating film 12.

  Therefore, in this case, even if the deposit placed on the surface of the coating film 12 is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide fixed on the surface of the coating film 12 Since it falls by vibration in the cold state, the cleaning property as a cooking utensil can be further remarkably improved.

  Further, in this embodiment, when a cooked object such as sword fish or bird thigh is cooked and oil stains are scorched from the cooked object to the surface of the coating film 12, it is coated in a cold state after heating. A ceramic component that can be removed without using a cleaning aid by dipping a neutral detergent into the water so that the oil stain fixed on the surface of the film 12 is immersed in water or as a fine powder 21 of the coating film 12. Selected.

  That is, the ceramic component here has a particle size that is equal to or smaller than the particle size of the adhered food element before painting, and has a diameter, width, depth depression, or gap that does not catch the food element after painting. The main component is ceramic particles (microparticles 21) such that the coating film 12 having a smooth surface is formed.

  Therefore, in this case as well, it is possible to provide a cooking utensil that has high hardness and is hard to be scratched and has non-adhesiveness to which dirt is difficult to adhere and that is easy to wipe off dirt and is easy to clean. Even if oil stains fall on the surface, the oil stains adhered to the surface of the coating film 12 can be removed without using cleaning aids in the cold state after heating, greatly improving the cleanability of cooking utensils. Can be made.

  In addition, this invention is not limited to each embodiment mentioned above, A various change is possible in the range which does not deviate from the meaning of this invention. For example, as long as the composition of the coating film 12 is mainly composed of alumina ceramic powder, a small amount of other ceramic powder may be mixed. Further, as the cooking utensil, for example, a cooking container having a deeper dish shape than the illustrated square dish 13 or baking plate 14 may be used, and the above-described coating film 12 may be formed on the cooking container. In addition, you may combine the characteristic of each said embodiment suitably.

12 Coating film (ceramic layer)
21 Fine powder (ceramic particles)
31 Base material

Claims (4)

In cooking utensils where the surface of a base material made of metal or surface-treated steel is coated with a coating mainly composed of ceramic particles,
A cooking utensil, wherein a ceramic component is selected so that when a finger touches the surface of the coating film before cooking and heating, the fingerprint is not attached, or the fingerprint attached by wiping is wiped off. In cooking utensils where the surface of a base material made of metal or surface-treated steel is coated with a coating mainly composed of ceramic particles,
When the deposit placed on the surface of the coating film is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide adhered to the surface is immersed in water or in a cooled state after heating. A cooking utensil characterized by selecting a ceramic component that can be wiped off within 1 minute by dripping a neutral detergent into the water.   Ceramics such that when the deposit placed on the surface of the coating film is carbonized by heating at 250 ° C. or more for 10 minutes or more, the carbide adhered to the surface falls by vibration in a cooled state after heating. The cooking utensil according to claim 2, wherein an ingredient is selected. In cooking utensils where the surface of a base material made of metal or surface-treated steel is coated with a coating mainly composed of ceramic particles,
When oil stains fall from the object to be cooked to the surface of the coating film and are scorched, the oil stains fixed on the surface are immersed in water in a cooled state after heating, or a neutral detergent is dropped into the soaked water. A cooking utensil characterized by selecting ceramic components that can be removed without using a cleaning aid.

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