JP6994908B2 - Trivet - Google Patents

Description

The present invention is used at the same time as a cooking device for cooking such as a gas stove, a grill, an oven, a gas burner, and a drying / baking furnace (for example, a pizza kiln). It relates to high temperature members for cooking equipment such as trivets, nets, drawer plates and other metal parts, cooking utensils such as pots and medicine cans, and heater proximity parts.

Conventionally, it is known that stainless steel has an extremely thin and highly protective passivation film with a thickness of several nm to several ten nm, and exhibits excellent corrosion resistance and heat resistance while maintaining a beautiful metallic luster. Has been done. For this reason, stainless steel is used as a high-temperature heating member for cooking equipment, which is partially heated to a high temperature of 450 ° C. or higher by being heated by a cooking equipment such as being exposed to an open flame during heating.

However, this stainless steel has a problem that a so-called temper color, in which the surface is discolored and colored in a high temperature environment, is generated. Such discoloration of stainless steel is based on the fact that the stainless steel is oxidized by high temperature to form an oxide layer. When the thickness of this oxide layer matches the wavelength of light, the reflected light interferes and is recognized as a color difference. When such discoloration due to oxidation appears on the surface of stainless steel as a metal member, it gives the impression that the appearance and design are sharply deteriorated.

In particular, high-temperature heating parts for cooking equipment, such as the trivets of gas stoves, grills and oven nets or drawer plates, and the tip parts of gas burners, have been exposed to open flames even though the number of days has not passed since the time of purchase. In some cases, such discoloration appeared just by touching it. In that case, there is a problem that the heated high temperature member gives the impression that it is exhausted and suddenly becomes old.

Therefore, conventionally, a technique capable of preventing discoloration due to oxidation of stainless steel in a high temperature environment has been studied. For example, Patent Document 1 discloses a technique for interposing a reaction layer having a thickness of 5 to 100 nm between a steel substrate and an alkaline silicate film in a stainless steel material having an alkaline silicate film on the surface. Through this reaction layer, it is expected to suppress the diffusion of atoms into the alkaline silicate film covering the surface of the steel material, stop the formation of the Cr—Fe—O oxide layer that causes the generation of temper color, and prevent discoloration. It was done.

Further, Patent Document 2 discloses a technique for forming a silicic acid compound film made of polysilazane on the surface of stainless steel. Since this silicic acid compound is an oxide in which oxygen diffusion is slow, it is expected that discoloration will be prevented by suppressing the progress of oxidation occurring in the vicinity of the surface of stainless steel.

Further, Patent Document 3 discloses a technique of a gas barrier film using a silicon nitride film. The silicon nitride film deposited by the chemical vapor deposition method is transparent and has high gas barrier properties. Since the technique disclosed in Patent Document 3 is a technique for forming a transparent film having a high gas barrier property, it is said that the effect of preventing oxidation can be expected by forming the film on a metal.

Further, Patent Document 4 discloses a technical idea of using an alumina thin film as an oxidation-suppressing film. The alumina thin film has excellent film forming properties, compactness, thermal stability, electrical insulation, etc., and is expected to prevent discoloration due to oxidation of stainless steel in a high temperature environment.

However, according to the techniques disclosed in Patent Documents 1 to 4, although discoloration due to oxidation of stainless steel can be prevented at high temperature, the base material is gradually oxidized by long-term high temperature use, and in particular. There is a problem that the durability against the temper color is insufficient in the ultra-high temperature range exceeding 700 ° C.

Further, Patent Document 5 and Patent Document 6 disclose a technique for suppressing oxidation by containing Al in stainless steel. The techniques described in Patent Documents 5 and 6 suppress oxidation by forming an oxide film derived from Al by containing Al in stainless steel. However, the effect of suppressing oxidation is limited to preventing the increase in oxidation and weakening due to oxidation at high temperature, and there is a problem that it does not prevent discoloration in appearance in a high temperature environment.

As described above, as described in Patent Documents 1 to 6, various techniques for suppressing oxides formed on the surface of stainless steel or the like and preventing temper color from being generated have been proposed. However, in the process of studying how temper color is generated, the inventors of the present application changed their mindset and suppressed discoloration and sticking of the temper color of a heated high-temperature member made of stainless steel of a cooking device. At the same time, he came up with the idea of a technology for easy cleaning and removal.

Japanese Unexamined Patent Publication No. 2008-231551 JP-A-2015-44300 Japanese Unexamined Patent Publication No. 2004-292877 Japanese Unexamined Patent Publication No. 2013-216760 JP-A-2002-339048 Special Table 2005-504176A

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object thereof is to prevent sticking due to adhered organic substances for a long period of time and to cause sticking. It is an object of the present invention to provide a heating high temperature member for a cooking device and a cleaning method thereof, which can be easily cleaned and removed even in the case.

The trivet according to the first invention is a trivet that is used at the same time as a gas stove for cooking, and is heated by the gas stove to a high temperature of 450 ° C. or higher, and organic substances may adhere to the gas stove to cause sticking . A ring-shaped ring portion placed around the cooking device and a claw portion attached to the ring portion are provided, and the claw portion includes a rising portion that rises upward from the outside of the ring portion and the claw portion. It has an inverted L-shape when viewed from the side, consisting of an upper side portion protruding outward from the ring portion so that the end portion faces outward from the upper end of the rising portion, and the surface of the gas stove excluding the lower portion of the rising portion. The entire area is characterized in that it can be heated to 450 ° C. or higher at least temporarily during cooking or cleaning.
Further, in the first invention, the trivet according to the second invention has a plurality of legs, and when it is placed on the gas stove, it is installed at a position higher by the amount of the legs. When the gas stove is set to high heat, the entire surface temperature becomes 450 ° C. or higher.

The trivet according to the third invention is characterized in that, in the first invention or the second invention , the entire surface surface can be heated to 450 ° C. or higher with the gas stove at least temporarily at the time of cooking.

The trivet according to the fourth invention is characterized in that, in any of the first to third inventions, the outermost surface has a layer containing any of a silicon compound, an aluminum compound, and a zirconium compound.

In the invention of any one of the first invention to the fourth invention, the Gotoku according to the fifth invention is a silicon compound, an aluminum compound, and a zirconium on a base material of any one of a stainless steel base material, an iron base material, and an aluminum base material. It is characterized in that a coating layer composed of a layer containing a silicon compound is further formed under a single layer of the compound or a layer containing an aluminum compound.

The Gotoku according to the sixth invention is characterized in that, in the fourth invention or the fifth invention, any one of a silicic acid compound as the silicon compound, an aluminum oxide compound as the aluminum compound, and a zirconium oxide compound as the zirconium compound is contained. do.

According to the first to sixth inventions, it is possible to prevent the deposits from sticking.

In particular, according to the third invention, since the entire surface can be heated to 450 ° C. or higher with a gas stove , even if an organic substance adheres to the trivet and sticks to it, it is vaporized at a high temperature of 450 ° C. or higher. Therefore, no sticking occurs over the entire surface.

In particular, according to the fourth to sixth inventions, the oxidation of the trivet can be suppressed by the gas barrier property of the silicon compound, the aluminum compound and the zirconium compound.

In particular, according to the sixth invention, the oxidation of the base material of the trivet can be surely suppressed by the silicic acid compound, the aluminum oxide compound, or the zirconium oxide compound of the coating layer having particularly excellent gas barrier properties.

It is a perspective view which shows the trivet which is the heating high temperature member for a cooking apparatus which concerns on 1st Embodiment of this invention. It is a side view which shows the heating high temperature member for the cooking equipment of the same above. FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. It is a photograph showing the result of actually using and monitoring the current trivet for one year. It is a figure which shows the occurrence position of the current trivet with a lump. It is a figure which shows the relationship between the occurrence of a lump and the temperature at the time of cooking. It is a figure which shows the measurement result which measured the surface temperature of the claw part at the time of cooking (during heating) of the trivet which concerns on 1st Embodiment. It is a figure which shows the measurement result which measured the surface temperature of the claw part at the time of cooking (during heating) of the present Gotoku. It is a side view which shows the trivet which is the heating high temperature member for a cooking apparatus which concerns on 2nd Embodiment of this invention. It is a side view which shows the trivet which is the heating high temperature member for a cooking apparatus which concerns on 3rd Embodiment of this invention. It is a photograph before heating of the experiment which confirmed what happens to the claws of the current trivet which was actually used for one year and which was shown in FIG. 4 by roasting it with the flame of a gas stove. It is a photograph 3 minutes after heating of the same experiment. It is a photograph 10 minutes after heating of the same experiment.

Hereinafter, a mode for carrying out a heating high temperature member for a cooking device to which the present invention is applied will be described in detail with reference to the drawings.

[First Embodiment]
First, with reference to FIGS. 1 to 3, the heating high temperature member for a cooking device according to the first embodiment of the present invention will be described by way of exemplifying the trivets installed in the gas stove G. FIG. 1 is a perspective view showing a trivet 1 which is a heating high temperature member for a cooking device according to the first embodiment of the present invention, and FIG. 2 is a side view showing the trivet 1.

The trivet 1 which is a high-temperature heating member for a cooking device according to the present embodiment is a member which is placed on a gas stove G provided in a system kitchen or the like and used at the same time as the gas stove G. As shown in FIGS. 1 and 2, the trivet 1 includes a ring-shaped ring portion 2 placed around the gas stove G, six claw portions 3 welded to the ring portion 2, and the like. , And has a function of placing a cooking utensil (not shown) such as a pot or a kettle on the claw portion 3.

As shown in FIG. 2, the claw portion 3 is a side view inverted L-shaped plate including a rising portion 30 rising upward from the ring portion 2 and an upper side portion 31 protruding outward from the upper end of the rising portion 30. It is a shaped part. The trivet 1 is a heated high-temperature member in which a part of the claw portion 3 is directly in contact with the flame of the gas stove G, which is a cooking device, and is placed in a high-temperature environment exceeding 700 ° C.

Next, the base material and the coating layer of the trivet 1 will be described with reference to FIG. FIG. 3 is an enlarged cross-sectional view taken along the line AA showing a state in which the claw portion 3 of the trivet 1 of FIG. 2 is cut on the vertical surface of the line AA. As shown in FIG. 3, the trivet 1 according to the present embodiment is subjected to a surface treatment for preventing discoloration, in which a base material 10 made of stainless steel containing aluminum and a coating layer 11 are formed on the surface of the base material 10. It is a metal member made of stainless steel.

The content of aluminum with respect to the total weight of the stainless steel of the base material 10 is preferably, for example, 1 to 12% by weight, and more preferably 2 to 4% by weight. Of course, the trivet according to the present invention is not limited to those containing aluminum, and may be other metals instead of stainless steel. However, in stainless steel, the base material 10 is made of stainless steel because the added Cr combines with oxygen in the air to form an extremely thin and highly protective passivation film with a thickness of several nm to several ten nm. It is preferable to use the same material because it exhibits excellent corrosion resistance and heat resistance.

The coating layer 11 is composed of a single layer containing any one of a silicon compound, an aluminum compound, and a zirconium compound. This is because the gas barrier properties of the silicon compound, the aluminum compound, and the zirconium compound can prevent the generation of temper color, which is an oxidative discoloration.

Examples of the silicon compound include dehydration-condensed silicon tetraethoxydo, polysilazane, siloxane, silicate, silicon nitride, silicon carbide and the like. Further, since the silicon compound has a high gas barrier property, the silicon compound used for the coating layer 11 is preferably a crystal dispersion liquid mainly composed of silica having a concentration of 10% and an average diameter of 25 nm or more. Of course, any compound of silicon (Si) may be used, and it goes without saying that the substance is not limited to the exemplified substance.

Examples of the aluminum compound include aluminum oxide (Al ₂ O ₃ ), aluminum nitride (Al N), mullite (aluminosilicate mineral: Al ₆ O ₁₃ Si ₂ ), spinel (spine: Mg Al ₂ O ₄ ) and the like. .. Further, since the gas barrier property is high, the aluminum compound used for the coating layer 11 is preferably an aluminum hydroxide nanoparticle dispersion having a concentration of 3% and an average diameter of 200 nm or more. Of course, any compound of aluminum may be used, and it goes without saying that the substance is not limited to the exemplified substances.

Examples of the zirconium compound include zirconium oxide (zirconia: ZrO ₂ ), stabilized zirconia added with an oxide, zircon (hyacinth ore: ZrSiO ₄ ) and the like. Further, since the gas barrier property is high, the zirconium compound used for the coating layer 11 is preferably a zirconium nanoparticle dispersion having an average diameter of 10 nm or more. Of course, any compound of zirconium may be used, and it goes without saying that the substance is not limited to the exemplified substance.

Further, it is preferable that a transparent substance is selected from the above-mentioned substances for the coating layer 11. Here, "transparency" refers to the property of transmitting reflected light so that even the metallic luster of the material of the base material 10 can be visually recognized. Therefore, the coating layer 11 makes it possible to visually recognize the beautiful metallic luster of the coated base material 10 while preventing the base material 10 from being oxidized, and the trivet 1 having extremely excellent design can be obtained.

Although the example in which the coating layer 11 is formed on the surface of the metal base material 10 has been described as an example, there is no base material 10 in FIG. 3, and the entire cross section is made of a silicon compound, an aluminum compound, or a zirconium compound. It may be composed of a single layer containing any one of them.

<Principle of preventing dirt and carbide from sticking>
Next, with reference to FIGS. 4 to 8, the principle (mechanism) of preventing the fouling of the heated high-temperature member for cooking equipment and the sticking of carbides according to the present invention will be described. FIG. 4 is a photograph showing the results of monitoring the current trivets by actually using them for one year.

The current Gotoku 1 ^# is made of a material substantially equivalent to the above-mentioned Gotoku 1, and the difference is that the above-mentioned ring portion 2 is attached with a side-viewing U-shaped claw portion 5. It is a point (see FIG. 5). Therefore, the same configuration is designated by the same reference numeral, and detailed description thereof will be omitted. The current trivet 1 ^# is a trivet that has been completed as a prototype and is in the process of conducting demonstration experiments such as endurance tests at the final stage for practical use. do not have. That is, the current trivet 1 ^# is just before the development of the present invention and is presented for comparison with the trivet according to the present invention.

As shown in FIG. 4, the inventors of the present application focused on the fact that the current Gotoku 1 ^# was actually used for one year and monitored, and as a result, the sticking occurred only in a certain range. Then, we investigated the relationship between the temperature and the position where the trivet 1 ^# appears. FIG. 5 is a diagram showing the current occurrence position of the trivet 1 ^# with lumps, and FIG. 6 is a diagram showing the relationship between the occurrence of lumps and the temperature at the time of cooking. The actual use for one year was monitored by using a gas stove over high heat.

As shown in FIGS. 5 and 6, the lower portion 50 of the claw portion 5 of the current trivet 1 ^# is a low temperature region X1 which is less than 200 ° C. even when the gas stove G is ignited during cooking. Therefore, even if the organic matter adhered and was exposed to this temperature (low temperature) for a long period of time, the adhered organic matter did not carbonize. That is, as shown in FIGS. 4 and 5, no sticking occurred on the lower portion 50, and dirt (organic matter) could be easily wiped off with a wet cloth.

Further, as shown in FIGS. 5 and 6, the flame contact proximity portion 51 of the claw portion 5 of the current trivet 1 ^# is in a medium temperature range of 200 ° C. or higher and lower than 450 ° C. when the gas stove G is ignited during cooking. It was X2. Therefore, when the organic matter adheres and is exposed to this temperature (medium temperature) for a long period of time, the adhered organic matter is carbonized and sticks. However, even with the current trivet 1 ^# , it was possible to partially remove the carbonized attached organic matter by rubbing it with a neutral detergent, etc., and it was possible to remove the severe stickiness by rubbing it with a hard resin card such as a credit card. In addition, the current Gotoku 1 ^# has extremely high discoloration resistance, alteration resistance, and deformation resistance (including all of these properties) as compared with the conventional Gotoku described in Patent Documents 1 to 6 described in the background technology. It has heat resistance (hereinafter the same).

It should be noted that the sticking of carbides in the mid-temperature range is not limited to the spillage, and it is considered that the sticking of transparent deposits such as oil smoke occurs in the mid-temperature range X2.

As shown in FIGS. 5 and 6, the flame contact portion 52 of the claw portion 5 of the current trivet 1 ^# is a high temperature region X3 that becomes 450 ° C. or higher when the gas stove G is ignited during cooking. Generally, the temperature range was 450 ° C. or higher and lower than 850 ° C. Carbide did not stick to the flame contact portion 52, which is the high temperature region X3.

It is probable that the reason why the sticking did not occur is that the carbonized organic matter became carbon dioxide (CO ₂ ) and vaporized. In addition, compared to the conventional trivets described in Patent Documents 1 to 6, the current trivet 1 ^# has a long-term high temperature environment of 700 ° C or higher, which is exposed to an open flame, due to the gas barrier property of the coating layer 11 and the like. It is considered that even when exposed, it exhibits high heat resistance and can prevent the occurrence of temper color and sticking.

Based on these points, the inventors of the present application utilize the extremely high heat resistance of the surface treatment for preventing discoloration by the combination of the base material 10 of the current trivet 1 ^# and the coating layer 11 to prevent stains from adhering to the surface. It is a change from the conventional idea of doing. That is, since the trivet 1 has extremely high heat resistance, if the substantially entire area of the claw portion 3 of the trivet 1 can be set to a high temperature range X3 of 450 ° C. or higher during cooking (heating) or cleaning, at the start of use. It was found that the initial state of the trivet can be maintained for an extremely long period of time, and the trivet can be created with extremely little cleaning work.

FIG. 7 is a diagram showing the measurement results of measuring the surface temperature of the claw portion 3 at the time of cooking (during heating) of the trivet 1 according to the first embodiment described above, and FIG. 8 is a diagram showing the measurement results of the current trivet 1 ^# described above. It is a figure which shows the measurement result which measured the surface temperature of the claw part 5 at the time of cooking (during heating). As shown in FIG. 7, in the trivet 1 according to the first embodiment, only the lower contact portion (ring portion 2) of the claw portion 3 with the gas stove G and the lower portion of the rising portion 30 in the vicinity thereof become the gas stove G. Most of the claw portion 3 can be at least temporarily set to the high temperature range X3, although the medium temperature range X2 reaches 290 ° C. during cooking with a fire. For this reason, it is considered that the carbonized organic matter becomes carbon dioxide (CO ₂ ) and vaporizes, and maintenance is not required for a long period of time, and temper color and sticking, which are oxides, do not occur.

On the other hand, as shown in FIG. 8, the current trivet 1 ^# drops to 230 ° C as soon as it enters the flame contact proximity portion 51 away from the flame contact portion 52, and the lower portion 50 has a low temperature range of 200 ° C or less over the entire surface. It is X1. Therefore, as described above, it is presumed that carbides have adhered to the medium temperature region X2.

The difference between the two is that the claw portion 3 of the trivet 1 has a large mass (volume) of the portion that becomes the flame contact portion, whereas the flame contact portion 52 of the trivet 1 ^# has a relatively small mass (volume). It is considered that the trivet 1 can transfer the heat of the flame contact part to the whole in a shorter time. Therefore, by increasing the mass (volume) of the part that becomes the flame contact part like the trivet 1, the claws can be clawed in a short time by simply roasting with high heat of the gas stove G during cooking (heating) or cleaning. The entire surface of the portion 3 except the lower portion of the rising portion 30 can be set as the high temperature region X3.

According to Gotoku 1, which is a high-temperature heating member for cooking equipment according to the first embodiment described above, by increasing the volume of the portion that becomes the flame contact portion, the gas stove G can be heated over high heat during cleaning or cooking. The entire surface of the claw portion 3 except for the lower contact portion (ring portion 2) with the gas stove G and the vicinity thereof (the portion of the medium temperature region X2) can be set as the high temperature region X3 in a short time only by roasting. Therefore, while preventing the oxidative discoloration of the trivet 1, the deposits do not stick and the beautiful luster of the trivet 1 when it is new can be maintained without the trouble of cleaning.

Hereinafter, the experimental verification performed to confirm the effect of the combination of the base material and the coating layer of the above-mentioned trivet 1 will be described in detail.

In this experimental verification, first, as shown in Tables 1 and 2, a plurality of types of samples were prepared, and a water pot discoloration test and a discoloration prevention durability improving effect were confirmed.

The sample is composed of only a metal base material, and Comparative Examples 1 to 4 in which no coating layer is laminated on the surface thereof, and a single-layer coating layer containing the above-mentioned components on a base material containing no aluminum. Examples 1 to 7 of the present invention coated, Examples 8 to 14 of the present invention in which a single coating layer containing the above-mentioned component is coated on a base material containing aluminum, and the above-mentioned above on a base material containing no aluminum. Example 15 of the present invention in which a coating layer containing the above-mentioned components is laminated over two layers, and Example 16 of the present invention in which a coating layer containing the above-mentioned components is laminated over two layers on a substrate containing aluminum. Consists of.

For Comparative Examples 1 and 2 and Examples 1 and 2 of the present invention, aluminum-free stainless steel (SUS304) and aluminum-free stainless steel (SUS430) were used as the base material. Further, in Examples 8, 10, 11, 13, 16 and Comparative Example 3 of the present invention, stainless steel (15Cr-4Al-LC, N) containing 4% by weight of aluminum with respect to the total weight of stainless steel was used as a base material. In Examples 9, 12, 14 and Comparative Example 4 of the present invention, stainless steel (18Cr-2Al-Ti) containing 2% by weight of aluminum with respect to the total weight of stainless steel is used as a base material.

In Examples 1, 2, 8 and 9 of the present invention, in order to form a silicon compound main film A as a coating layer, a crystal dispersion liquid mainly composed of silica having a concentration of 10% and an average diameter of 25 nm or more as a precursor thereof is used as a paint. It is being applied.

In Examples 3 and 10 of the present invention, polysilazane having a concentration of 20% is applied as a paint as a precursor thereof in order to form a silicon compound main film B as a coating layer.

In Examples 4, 5, 11 and 12 of the present invention, in order to form an aluminum compound main film as a coating layer, an aluminum hydroxide nanoparticle dispersion having a concentration of 3% and an average diameter of 200 nm or more is applied as a paint as a precursor thereof. There is.

In Examples 6, 7, 13 and 14 of the present invention, a zirconium nanoparticle dispersion having an average diameter of 10 nm or more is applied as a paint as a precursor thereof in order to form a zirconium compound main film as a coating layer.

In Examples 15 and 16 of the present invention, the above-mentioned silicon compound main film A is laminated directly on the base material, and the above-mentioned aluminum compound main film is laminated directly on the silicon compound main film A to form a two-layer structure.

Each of the above-mentioned samples was experimentally verified by a water pot discoloration test. For the water pot discoloration test, a pot (diameter 24 cm) containing 2 liters of water was placed in a heating device provided with the painted trivets of Comparative Examples 1 to 4 and Examples 1 to 16 of the present invention, and the height was 4.4 kW. Heating was repeated for 1 hour continuously with a calorie burner, and the discoloration was visually evaluated according to JIS K5600-4-3 (only the light source uses LED (Ohm Electric LEDPL48W)). This water pot discoloration test was conducted in a room where the floor wall surface was all white (SCI value was 90.61), and the illuminance at the observation position was about 2300 Lux.

In Table 1, aluminum is taken as an example of SUS304 as a representative of a metal containing no aluminum in the base material and stainless steel (15Cr-4Al-LC, N) containing 4% by weight of aluminum as a representative of a metal containing aluminum. The effect of improving the durability against discoloration of the contained metal is shown by the magnification. This discoloration prevention durability improving effect is the discoloration prevention durability improving effect = (discoloration start time (h) in a stainless steel specimen containing 4% by weight of aluminum) / (discoloration start time (h) in a sample of SUS304). ). This discoloration prevention durability improvement effect is confirmed more than 3 times, and the discoloration prevention durability is more than 310h ◎, and the effect of the aluminum-containing base material is confirmed more than 3 times, but the discoloration prevention durability is less than 310h. A total evaluation was performed with ◯ and × for those for which the effect of the aluminum-containing base material was not confirmed.

In the water pot discoloration test, visual evaluation was performed under the above-mentioned conditions. First, as Comparative Examples 1 to 4, a water pan discoloration test was performed on SUS304 and SUS430 containing no aluminum, stainless steel containing 4% by weight of aluminum, and stainless steel containing 2% by weight of aluminum without coating. The discoloration start time was measured. As a result, the discoloration start time was 2 minutes regardless of the substrate. From this, the effect of improving the discoloration prevention durability of the aluminum-containing substrate was not confirmed without any coating, and the overall evaluation was x.

Next, as Examples 1 to 3 of the present invention, SUS304 and SUS430 containing no aluminum, and as Examples 8 to 10, stainless steel containing 4% by weight of aluminum and stainless steel containing 2% by weight of aluminum, the present invention. Under the coating conditions of the invention example, the silicon compound main film A and the silicon compound main film B were coated, and a water pot discoloration test was conducted for each of them, and the discoloration start time was measured. As a result, the discoloration start time of Examples 1 to 3 of the present invention was 110 hours, but the discoloration was not confirmed in all of Examples 8 to 10 of the present invention even at 470 hours.

Therefore, as shown in Table 2, by laminating the coating layer containing the silicon compound on the base material containing aluminum, the durability against discoloration is prevented as compared with the case where the coating layer is laminated on the base material containing no aluminum. It was found that the effect of improving sex was at least four times higher. Further, as shown in Table 1, the durability of the two-layer film having the best anti-discoloration durability in the base material containing no aluminum exceeds 310 hours in Example 15 of the present invention, so that the overall evaluation was ⊚. ..

Next, as Examples 4 and 5, the present invention relates to SUS304 and SUS430 which do not contain aluminum, and as Examples 11 and 12, the present invention relates to stainless steel containing 4% by weight of aluminum and stainless steel containing 2% by weight of aluminum. Under the coating conditions of the example, the aluminum compound main film was coated, and a water pot discoloration test was performed for each, and the discoloration start time was measured.

As a result, the discoloration start times of Examples 4 and 5 of the present invention were 10 hours and 4 hours, respectively, but in the examples 11 and 12 of the present invention, no discoloration was confirmed even at the time of 145 hours. From this, by laminating the coating layer containing the aluminum compound on the base material containing aluminum, the effect of improving the discoloration prevention durability is at least 14. It turned out to be more than five times. However, although the effect of the base material containing aluminum was confirmed, its durability did not exceed 310 hours, so the overall evaluation was ◯.

Next, as Examples 6 and 7, the present invention relates to SUS304 and SUS430 which do not contain aluminum, and as Examples 13 and 14, a stainless steel containing 4% by weight of aluminum and a stainless steel containing 2% by weight of aluminum. Under the coating conditions of the example, the aluminum compound main film was coated, and a water pot discoloration test was performed for each, and the discoloration start time was measured.

As a result, the discoloration start time of Examples 6 and 7 of the present invention was 45 minutes, but the discoloration start time of Examples 13 and 14 of the present invention was 4 hours and 18 hours, respectively.

From this, by laminating the coating layer containing the zirconium compound on the base material containing aluminum, the effect of improving the discoloration prevention durability is 5 times as much as when laminating on the base material containing no aluminum. It turned out to be. However, although the effect of the base material containing aluminum was confirmed, its durability did not exceed 310 hours, so the overall evaluation was ◯.

Next, as Examples 15 and 16, the above-mentioned silicon compound main film A is laminated directly on the metal layer for SUS304 containing no aluminum and stainless steel containing 4% by weight of aluminum under the coating conditions of the present invention. Then, the above-mentioned aluminum compound main film was laminated directly on the silicon compound main film A, and a water pot discoloration test was conducted for each of them, and the discoloration start time was measured.

As a result, the discoloration start time of the present invention example 15 was 310 hours, and the discoloration start time of the present invention example 16 was 1700 hours.

For this reason, a coating layer having a two-layer structure of a coating layer containing a silicon compound and a coating layer containing an aluminum compound is laminated on a base material containing aluminum, thereby being laminated on a base material containing no aluminum. It was found that the effect of improving the durability against discoloration was 5.5 times higher than that of the case. In addition, the durability exceeded 310 hours, so the overall evaluation was ◎.

From the above experimental results, Examples 1 to 14 of the present invention having a layer containing any of a silicon compound, an aluminum compound, and a zirconium compound on the outermost surface are at least 22 times more discolored than Comparative Examples 1 to 4 without coating. It can be seen that it has preventive durability.

In addition, it is not possible to confirm the difference in the durability of discoloration prevention depending on the presence or absence of aluminum contained in the base material alone. On the other hand, Examples 8 to 14 of the present invention contain aluminum as a base material and further form a coating layer composed of a single layer containing any of a silicon compound, an aluminum compound, and a zirconium compound on the upper layer of the base material. It was found that the discoloration prevention durability was significantly improved as compared with the case where the above-mentioned coating layer was formed on the upper layer of the base material containing no aluminum.

Further, when this coating layer is a single layer containing a silicon compound as in Examples 8 to 10 of the present invention, discoloration prevention durability exceeding that of Example 15 of the present invention in which a two-layer film is laminated with a base material containing no aluminum. It was found that the sex can be exhibited in a single layer.

Further, in Example 16 of the present invention, the effect of the base material containing aluminum was also shown, and it was possible to further improve the durability.

[Second Embodiment]
Next, with reference to FIG. 9, the trivet 1', which is a high-temperature heating member for cooking equipment according to the second embodiment of the present invention, will be described. FIG. 9 is a side view showing a trivet 1'which is a heating high temperature member for a cooking device according to a second embodiment of the present invention.

The only difference between the trivet 1'according to the second embodiment and the trivet 1 according to the first embodiment described above is the joint position between the ring portion and the claw portion. The explanation of is omitted.

As shown in FIG. 9, the trivet 1'is composed of a ring-shaped ring portion 2'located above the gas stove G, six claw portions 3'welded to the ring portion 2', and the like. It is configured.

This claw portion 3'has substantially the same shape as the claw portion 3 of the trivet 1, and is an inverted L-shaped side view including a rising portion 30'and an upper side portion 31'protruding outward from the upper end of the rising portion 30'. It is a plate-shaped part of. The trivet 1'is a heated high temperature member in which a part of the claw portion 3'is directly in contact with the flame of the gas stove G, which is a cooking device, and is placed in a high temperature environment exceeding 700 ° C.

Further, the ring portion 2'is provided with a plurality of leg portions 20', and when placed on the gas stove G, the ring portion 2'is installed at a higher position than the above-mentioned ring portion 2. Therefore, most of the ring portion 2'becomes a flame contact portion that comes into contact with the flame of the gas stove G, and becomes a high temperature region X3 in which the entire surface of the ring portion 2'is 450 ° C. or higher when the gas stove G is set to high heat. .. Therefore, at the time of cleaning, the trivet 1'can set the entire surface to a high temperature region X3 of 450 ° C. or higher simply by igniting the gas stove G to a high heat.

According to the trivet 1'according to the second embodiment, since the entire surface can be heated to 450 ° C. or higher with a cooking device, even if an organic substance adheres to the heated high temperature member, it is vaporized. It never sticks. Therefore, maintenance is not required, and it is possible to maintain the beautiful luster of the heated high-temperature member when it is new.

[Third Embodiment]
Next, with reference to FIG. 10, the trivet 1 ”which is the heating and high temperature member for the cooking equipment according to the third embodiment of the present invention will be described. FIG. 10 shows the cooking equipment according to the third embodiment of the present invention. It is a side view which shows the trivet 1 "which is a heating high temperature member for use.

The "Gotoku 1" according to the third embodiment is composed of a material substantially equivalent to the above-mentioned Gotoku 1, and the difference is that a pair of upper and lower ring portions 2 "equivalent to the above-mentioned ring portion 2 is provided. The ring portion 2 ", 2" is attached with a side-viewing U-shaped claw portion 5 "which is equivalent to the claw portion 5 of the above-mentioned trivet 1 ^# .

As shown in FIG. 10, the claw portion 5 "is a U-shaped plate-shaped portion in the side view, and the U-shaped corner portions are equidistant to the pair of upper and lower ring portions 2" and 2 ", respectively. Six pieces are attached in a radial pattern. The claw portion 5 "has a lower side portion 50" extending radially outward from the lower ring portion 2 "and a ring portion 2" above the base end portion of the lower side portion 50 ". It is composed of a rising portion 51 "which rises to the top and an upper side portion 52" which extends radially outward from the upper end of the rising portion 51 ".

Due to such a configuration, the Gotoku 1 "can be attached to any of the ring portions 2" and 2 "on the gas stove G, and can be installed on the gas stove G by turning it upside down. Therefore, when the gas stove G is ignited during cooking or cleaning, as shown in FIG. 10, the rising portion 51 "and the upper side portion 52" become the flame contacting portion in contact with the flame, and the temperature becomes 450 ° C. or higher. ..

At this time, even if the lower side portion 50 "becomes the mid-temperature region X2 and the transparent deposits such as oil smoke are stuck, if the trivet 1" is turned upside down, the upper side portion 52 "and the lower side portion 50" are formed. By igniting the gas stove G by replacing "", the lower side portion 50 "can be set to a high temperature range of 450 ° C. or higher.

According to the trivet 1 "according to the third embodiment, by changing the installation method on the gas stove G and turning it upside down, the lower side portion 50" (FIG. 10), which is a mid-temperature range during cooking where sticking is likely to occur. The upper side 52 ”) can be heated to 450 ° C. or higher with the gas stove G when the top and bottom are upside down. It is possible to maintain the beautiful luster of a new product without any problems.

<Cleaning method for heated high temperature members>
Next, a method of cleaning the heated high temperature member according to the embodiment of the present invention will be described with reference to FIGS. 11 to 13. FIGS. 11 to 13 are photographs of an experiment in which the claw portion 5 of the current trivet 1 ^# , which had been actually used for one year as shown in FIG. 11 is before heating, FIG. 12 is after 3 minutes of heating, and FIG. 13 is after 10 minutes.

As shown in FIG. 11, when the claw portion 5 is directly roasted with a flame of a gas stove and heated to a high temperature exceeding 450 ° C., after 3 minutes, the original carbonization decreases as shown in FIG. However, it was confirmed that carbonization of the adhering organic matter caused sticking in the middle temperature range of 200 ° C or higher and lower than 450 ° C, which is the vicinity of the flame contact.

Then, after 10 minutes of continuous heating, as shown in FIG. 13, it was confirmed that the original sticking completely disappeared and that the sticking occurred further downward.

Therefore, as in the method for cleaning the heated high-temperature member according to the present embodiment, when the cooking occurs in the medium temperature range of 200 ° C. or higher and lower than 450 ° C., the gas stove, which is a cooking device, causes the sticking. By heating the portion where the stall is generated to 450 ° C. or higher, it is possible to remove the sticking and clean it.

That is, according to the method for cleaning the heated high-temperature member according to the present embodiment, the heated high-temperature member can be used without bothering the user by an extremely simple method of heating the portion where the sticking has occurred to 450 ° C. or higher. It is possible to completely remove and clean a certain trivet with a lump in a short time of about 10 minutes.

<Sex test with lumps>
Next, using Table 3, the relationship between the combination of the base material and the coating layer and the stickiness, and the stickiness test conducted to confirm the relationship between these and the heating temperature will be described.

In the test, various test pieces consisting of a combination of a base material and a coating layer were prepared as shown in the left column of Table 3, 5 μL of oil was spread on them to a size of about a 10-yen coin, and an oven or a muffle furnace was used. The oil was heated at 150 ° C, 200 ° C, 300 ° C, 400 ° C, 450 ° C, 500 ° C, and 600 ° C for 60 minutes, and the state of the oil was observed and evaluated. This is mainly an evaluation of whether or not there is oil residue and whether or not there is lumpiness. In Table 3, 〇 is the evaluation of no surface deposits, 〇'is the oil residue, Δ is the evaluation of small with lumps, and × is the evaluation of large with lumps.

As shown in Table 3, regardless of the combination of the base material and the coating layer, it can be confirmed that the sticking occurs in the temperature range of about 200 ° C. or higher and lower than 450 ° C., and that the sticking does not occur at 450 ° C. or higher. rice field.

<Removability test with lumps>
Next, using Table 4, the relationship between the combination of the base material and the coating layer and the removability with stubbornness, and the removability test with stubbornness conducted to confirm the relationship between these and the heating temperature will be described.

In the test, various test pieces consisting of a combination of a base material and a coating layer were prepared as shown in the left column of Table 4, and 5 μL of oil was spread on them to a size of about a 10-yen coin and placed in an oven or a muffle furnace. Heated at 300 ° C for 15 minutes to generate lumps, and then heated in an oven or muffle furnace at 400 ° C, 450 ° C, 500 ° C, and 600 ° C for 60 minutes to remove the lumps. It was evaluated by observing whether or not it was. In Table 4, 〇 is the evaluation with no lumps, Δ is the evaluation with small lumps, and × is the evaluation with large lumps.

As shown in Table 4, it was confirmed that the generated stickiness can be removed by heating to 450 ° C. or higher regardless of the combination of the base material and the coating layer.

<Discoloration prevention test>
Next, using Table 5, the relationship between the surface treatment of the base material and the coating layer and the discoloration prevention property, and the discoloration prevention property test conducted to confirm these and the heating temperature will be described.

The test was carried out by heating the test piece in the above-mentioned oven or muffle furnace at 150 ° C, 200 ° C, 300 ° C, 400 ° C, 450 ° C, 500 ° C, and 600 ° C for 60 minutes to confirm the removability with lumps. , The presence or absence of discoloration / deterioration was visually confirmed. In Table 5, 〇 is the evaluation of no discoloration / deterioration, and × is the evaluation of discoloration / deterioration.

As shown in Table 5, in the combination of the base material and the coating layer which have been subjected to the surface treatment of the discoloration prevention measures as in the trivets 1, 1', 1 "related to the present embodiment, the discoloration / deterioration is not observed at any temperature. On the other hand, the discoloration of the raw stainless steel base material and the aluminum-containing stainless steel base material, which were not surface-treated, could be confirmed at 400 ° C. or higher.

From the above tests, we utilize the extremely high heat resistance of the surface treatment by combining the base material and the coating layer, and prevent discoloration and deterioration by raising the temperature to 450 ° C or higher with a cooking device such as an oven during cooking or cleaning. At the same time, it was confirmed that the sticking did not occur or the sticking could be removed.

<Time dependence of stickiness>
Next, using Tables 6 to 12, the time-dependent test of the stickiness performed to confirm the relationship between the stickiness and the heating time at each heating temperature will be described.

In the test, as in the above-mentioned anti-stickiness test, various test pieces consisting of a combination of a base material and a coating layer were prepared as shown in the left column of each table, and 5 μL of oil was added to them in a size of about 10 yen coins. Spread the oil and heat it in an oven or muffle furnace at 150 ° C, 200 ° C, 300 ° C, 400 ° C, 450 ° C, 500 ° C, and 600 ° C for 60 minutes, and observe the state of the oil every 15 minutes. And evaluated. In each table, 〇 is the evaluation of no surface deposits, 〇'is the oil residue, Δ is the evaluation of small with lumps, and × is the evaluation of large with lumps.

As shown in Table 6, when the heating temperature is 150 ° C., no sticking occurs regardless of the combination of surface treatments, and as shown in Table 7, when the heating temperature is 200 ° C., heating is performed for 30 minutes or 45 minutes. Then, sticking occurs, and as shown in Table 8, when the heating temperature reaches 300 ° C., sticking occurs only by heating for 15 minutes.

On the contrary, as shown in Table 9, when the heating temperature reaches 400 ° C., the heating for 45 minutes or 60 minutes starts to eliminate the sticking, and as shown in Table 10, the heating temperature becomes high. At 450 ° C., when heated for 60 minutes, the sticking disappeared in all the test specimens.

Then, as shown in Table 11, when the heating temperature reaches 500 ° C., the sticking disappears when heated for 15 minutes or 30 minutes, and as shown in Table 12, when the heating temperature reaches 600 ° C., only 15 minutes are heated. With all the test pieces, the sticking is eliminated.

<Time-dependent removability with lumps>
Next, using Tables 13 to 16, the time-dependent test of the non-sticky removability performed to confirm the relationship with the heating time at each heating temperature will be described.

In the test, as in the above-mentioned test for removing with lumps, various test pieces composed of a combination of a base material and a coating layer were prepared as shown in the left column of each table, and 5 μL of oil was added to them for about 10 yen coins. Spread to size and heat in an oven or muffle furnace at 300 ° C for 15 minutes to generate lumps, then in an oven or muffle furnace at 400 ° C, 450 ° C, 500 ° C, and 600 ° C. It was heated for a maximum of 60 minutes, and every 15 minutes, it was observed and evaluated whether or not the sticking was removed. In each table, 〇 is the evaluation with no lumps, Δ is the evaluation with small lumps, and × is the evaluation with large lumps.

As shown in Table 13, when the heating temperature was 400 ° C., only the enamel (iron base material + SiO ₂ ) was heated for 30 minutes to remove the sticking. However, as shown in Table 14, when the heating temperature was 450 ° C., heating for 60 minutes removed the sticking in all the test pieces.

As shown in Table 15, when the heating temperature reaches 500 ° C., heating for 15 minutes or 30 minutes removes the sticking, and as shown in Table 16, when the heating temperature reaches 600 ° C., heating for 15 minutes is all that is required. The test piece was removed from the sting.

From the above time-dependent confirmation test of stickiness, utilizing the extremely high heat resistance of the surface treatment by combining the base material and the coating layer, the maximum temperature is 450 ° C or higher with a cooking device such as an oven during cooking or cleaning. It was confirmed that by heating for 60 minutes, it was possible to prevent discoloration and deterioration, and to prevent the occurrence of sticking or to remove the sticking.

The heating high temperature member for cooking equipment according to the first to third embodiments of the present invention has been described in detail above, but any of the above-mentioned or illustrated embodiments has been embodied in carrying out the present invention. It merely shows an embodiment. Therefore, the technical scope of the present invention should not be construed in a limited manner by these.

In particular, the gas stove G's Gotoku 1,1', 1 "was illustrated as an example of the heating high temperature member for the cooking equipment according to the embodiment of the present invention, but the present invention is not limited to the Gotoku, but the grill, oven, and gas. In cooking equipment such as burners and drying and baking furnaces, it can be applied to heated high temperature members heated to 450 ° C. or higher. For example, the present invention can be applied to gas stoves, grills, ovens, gas burners, drying and baking furnaces and the like. It can be suitably applied to metal members such as nets and drawer plates, cooking utensils such as pots and medicine cans, and heater proximity members used.

For example, when the cooking device is a grilled fish, the top plate and the lower heat cover provided in the grilled fish generally raise the temperature of the top plate in the grill to about 350 ° C. and lower the temperature during cooking. The fire cover heats up to about 300 ° C. Therefore, these members correspond to high-temperature heating members for cooking equipment. Further, when the top plate or the lower heat cover in the grill is a raw stainless steel material which has not been subjected to the above-mentioned surface treatment, when the temperature reaches 300 ° C. or higher, as shown in Tables 3 and 5, the base material is used. Discoloration and sticking occur. However, by applying the present invention to increase the heating power of the grilled fish or changing the installation position of these, by heating to 450 ° C or higher, the base material is prevented from discoloring and sticking occurs. It is possible to remove the sticking by not letting it or by vaporizing it even if it occurs.

1,1', 1 ": Gotoku (heated high temperature member for cooking equipment)
10: Base material 11: Coating layer 2, 2', 2 ": Ring part 20: Leg part 3, 3': Claw part 30, 30': Rising part 31, 31': Upper side part 5, 5": Claw part 50: Rising part 51: Flame contact proximity part 52: Flame contact part 50 ": Lower side part 51": Rising part 52 ": Upper side G: Gas stove (cooking equipment)
X1: Low temperature range X2: Medium temperature range X3: High temperature range

Claims (6)

It is a trivet that is used at the same time as a gas stove for cooking, and when it is heated by the gas stove , a part of it becomes a high temperature of 450 ° C or higher, and organic matter may adhere to it and cause sticking .
A ring-shaped ring portion placed around the gas stove and a claw portion attached to the ring portion are provided.
The claw portion includes a rising portion that rises upward from the outside of the ring portion and an upper side portion that protrudes outward from the upper end of the rising portion so that the end portion faces outward. It is L-shaped and has an L shape.
The trivet is characterized in that the entire surface of the gas stove except the lower part of the rising portion is configured to be able to heat at least temporarily to 450 ° C. or higher during cooking or cleaning. The ring portion has a plurality of legs and is installed at a position higher by the amount of the legs when placed on the gas stove, and when the gas stove is set to high heat, the entire surface surface is 450 ° C. or higher. To become a
The trivet according to claim 1, wherein the trivet is characterized by . The trivet according to claim 1 or 2 , wherein the entire surface is configured to be able to be heated to 450 ° C. or higher by the gas stove at least temporarily during cooking. The trivet according to any one of claims 1 to 3 , wherein the outermost surface has a layer containing any of a silicon compound, an aluminum compound, and a zirconium compound. A silicon compound is further contained in a single layer of a silicon compound, an aluminum compound, a zirconium compound, or a layer containing an aluminum compound on a base material of any of a stainless steel base material, an iron base material, and an aluminum base material. The five virtues according to any one of claims 1 to 4 , wherein a coating layer composed of layers is formed. The five virtues according to claim 4 or 5 , wherein the silicon compound contains a silicic acid compound, the aluminum compound contains an aluminum oxide compound, and the zirconium compound contains any of a zirconium oxide compound.

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