Heating body

[Detailed Description of the Invention]

Field of the Invention The present invention relates to the heating element used for a cooking device, a heating machine, etc. PRIOR ART The heating element used for a conventional cooking device, a heating machine, etc. was mainly a silica tube heater. In addition, as an object for cooking devices, what is called a mica heater that wound a sheath heater and heater wires around mica was used. Object of the Invention However, the following subjects occurred in prior art. That is, in the case of a silica tube heater, it is the composition which inserted the heater wires wound in the shape of toroidal one into the silica tube, but if salt etc. disperse during cooking and it adheres to a silica tube, a silica tube will devitrify, and far-infrared rays required for cooking become are hard to be obtained, or it becomes easy to damage a silica tube. Therefore, as a heat source temperature, at least 700degree C was a limit. It was difficult on the structure of a silica tube heater to develop in the shape of a field and to consider it as a surface-like heater. In the case of a sheath heater, heater wires are covered by the stainless steel of heat-resistant corrosion resistance, and when using for cooking, in order to use the secondary radiation from the above-mentioned stainless steel, the standup of temperature takes time. A life will become short as soon as quantity will write the temperature of the heater wires themselves further, if radiation temperature is set to 800''C. It was difficult to consider it as a constitutionally uniform field-like heating element like a silica tube heater. Since it was attached to the outside of the wall surface of a cooking device via an insulation material although it is easy to use a mica heater as a field-like heating element, it was difficult to be bad, and for the standup of the temperature of the wall surface of a cooking device, i.e., a radiation surface, to be late, and for heat transfer to make it the high temperature like 800 degreeC. In order to solve the above-mentioned subject, 800 degreeC to which the standup time of temperature was already suitable for To, cooking, or heating is obtained easily, and, moreover, it is possible as a heating element with easy field-like deployment to use the metal heating element of an iron-chromium aluminum system, a nickel chromium system, or a-nickel chromium system as it is. Thereby, the above-mentioned subject is solvable. However, even if heat resistance exposes the above-mentioned metal heating element into the hot high air, it does not damage, but if it uses for a cooking device, the salt which disperses from foodstuffs or a heated thing will adhere to this heating element. If it is used at high temperature like for example, 800 degreeC by this state, it will corrode easily and the new subject that it damages will generate the above-mentioned metal. On the contrary, since such corrosion occurred, the heater composition of the above-mentioned statement was able to be considered. The present invention solves the above-mentioned subject and is excellent in high temperature corrosion resistance, the standup of temperature is quick, high temperature radiation of about 800 degreeC is obtained, and, moreover, the deployment to a field-like heating element provides an easy heating element. Means for solving problem In order to solve the above-mentioned subject, the present invention provides an aluminum layer on 2 and nu Kel or nickel content metal, and this metal, and uses the heating element which consists of an oxidization aluminum layer produced by oxidizing this aluminum layer. Especially, the aluminum clad of nickel or the nickel content metal tends to be carried out as a base metal practical, and it is going to use the metal object which oxidized the account aluminum of clad back to front, and provided the oxidization alumina layer in the surface as a heating element as it is. OPERATION The present invention can solve a subject by the above-mentioned composition. That is, since it has the composition that the oxide film of the thin film was provided in the surface of the metal heating element in the present invention, specific heat can reach high temperature, for example, 800 degreeC, easily small, therefore quickly. And if a metal heating element is made into a tabular layer, if an electrode pattern is pierced to this, it can be alike, and can consider it as a field-like heating element more easily. It is making to provide an aluminum layer in nickel or a nickel content alloy in the present invention, to oxidize this aluminum layer and to provide an oxidization aluminum layer into the feature. When providing this oxidization aluminum layer, a part of nickel and aluminum are alloyed, and a strong corrosion-resistant nickel aluminum layer is formed. The oxidization aluminum layer generated by the surface is also strong to corrosion resistance, therefore the heating element by the present invention shows strong corrosion resistance to corrosive substances, such as salt which disperses at the time of cooking. EXAMPLE Hereinafter, one example of the present invention is described based on an accompanying drawing. In Drawing 1, as for heating element l, nickel aluminum 4 generated between nickel, nickel content alloy 2, oxidization aluminum layer 3 and the above-mentioned nickel or nickel content alloy 2, and the above-mentioned oxidization aluminum layer 3 and one copy of Yo have become. this heating element 1 -- the after-mentioned -- When (obtained by carrying out.) That is, aluminum layer 5 is provided in the surface of nickel or nickel content alloy 1. As a means which this aluminum layer 5 establishes, there are various means, such as spray plating, vapor deposition, and sputtering Cland. As for thermal spraying and a clad, the layer of a thick film is easily obtained among these means. The means especially by a clad can provide aluminum layer 5 without a pinhole. Although there are also various means to oxidize this aluminum layer 5, a means to heat at high temperature in the atmosphere is the most practical. Since nickel aluminum 4 which was excellent in corrosion resistance as mentioned above between nickel or nickel content alloy 2, and oxidization aluminum layer 3 is easily obtained when oxidizing especially by heating, corrosion resistance becomes good. The below-mentioned means performed as corrosion-resistant evaluation methods. Using the nickel content alloy in which nickel differs from nickel content as a base metal (21±2% of chromium content), the clad of the aluminum foil 5 was carried out to the surface, and it heated in the 5-hour atmosphere by 900 degreeC, and obtained oxidization aluminum layer 3 on the surface. + energizing Radiation 6 A and 50-micro-thick heating element 1 which were obtained by the above-mentioned method -- skin temperature -- 800" -- it closed. 5% of salt solution was dropped for every [ 0, 5 cc, and ] 26 in this state, and the number of times of having carried out salt solution A dropping by the time heating element l fractured estimated that corrosion resistance. In Drawing 3 showing a result in Imitation 3 figure, an arrow shows the boss and minimum of measurement and - seal shows average value. > seal in a figure shows the case where did not perform a clad but it Examination with base metal. Nickel content exceeds 50% and Z and corrosion resistance go up rapidly. This is considered for corrosion-resistant Ninkel aluminum to grow between base metal and this oxidization aluminum layer 2 with surface oxidization aluminum layer 3. According to the means of the present invention, the corrosion resistance of a heating element improves by leaps and bounds as mentioned above. Hereinafter, when this heating element 1 is used for a cooking device, it Kinmei concretely per. Drawing 4 shows high frequency cooking device 6. # (since control parts are unrelated to the present invention) which has the composition of having installed field-like heating element 7 in which this high frequency cooking device 6 consists of heating element 1 of the present invention on the maintenance material in which it was provided on high frequency shield 8 it omits and comes out. While preventing intercepting high frequency at the time of the above-mentioned high frequency shield 8 High frequency heating, and absorbing high frequency into field-like heating element 7 At the time of heater heating, radiation of a heating element is the thing it was made to reach a cooked thing directly, and has the composition of having provided many holes of abbreviation 3 phi in the heat-resistant stainless steel plate, and the area of the portion of this hole constitutes about 60% of the whole area. It was considered as field-like heating element 7 by carrying out the clad of the aluminum foil to this, and piercing in the shape of meandering, using the nickel chrome belt (NCHRWI)-like object for electric heat as heating element 1, and also heat-treating by 900 degreein the atmosphere C for 5 hours. This field-like heating element has a 1.2-kW output. When rated voltage 100■ was impressed, 700"C was reached in about 1 minute, and, 3 minutes afterward, the high temperature of 800 degreeC was able to be obtained. When the fish (heated thing) was put in and broiled in cooking room 10, the fish was able to be broiled by high temperature radiation of the above-mentioned 800 degreeC so that it might have a scorch uniformly in about 15 minutes. It required for about 25 minutes in order to roast, the conventional field-like heating element, for example, mica heater, and also it is One (it was not able to do in To.) about a scorch uniformly like a sheath heater or a silica tube heater. In the composition of the above-mentioned high frequency cooking device 6, the salt which disperses from foodstuffs or a heated thing adheres to the surface of heating element l during cooking. However, when it did not become a problem practically since heating element 1 of the present invention was excellent in corrosion resistance, i.e., high frequency induction heating (5% salt solution heating) and heater heating (fish baking) were Repeat(ed) by turns and performed, after [ most ] 500-cycle progress had not damaged heating element 1 of the present invention. On the other hand, when the nickel chrome belt for electric heat which is not processing the present invention was used as a die-cutting side-like heating element as it was, it damaged in 6 * cycle by corrosion. As mentioned above, the heating element of the present invention is excellent in corrosion resistance, and it turns out that it is a heating element with few variations per hour. EFFECT OF THE INVENTION According to the high temperature side-like heating element of the present invention, the following effect is acquired as mentioned above. That is, since high temperature corrosion resistance is very excellent, the heating element of the present invention can be used as it is to the cooking scattering thing at the time of cooking, without providing the exterior covering for cover like the conventional sheath heater, a silica tube heater, and a mica heater. Therefore, a field-like heating element can be easily built by die cutting etc. Except an oxide film layer with the thin surface, since there is no excessive exterior covering, therefore specific heat is small, temperature rises, it is quick, and since the skin temperature of a heating element itself turns into radiation temperature, moreover, high temperature radiation heating can be carried out easily. As mentioned above, if the heating element of the present invention is used, while it can be easily considered as a field-like heating element, a standup can already be and high temperature radiation can obtain the warmer obtained easily.

[Brief Description of the Drawings]

In order that Drawing 1 may obtain the sectional view of the heating element of one example of the present invention and Drawing 2 may obtain the heating element, the sectional view showing the state of a previous process, the characteristic figure showing the relation of the nickel content of the heating element and corrosion resistance, and Drawing 4 are important section sectional views showing an example at the time of using the heating element for a cooking device. [ Drawing / 3 ] 1 ...... heating element, 2 ...... nickel or nickel content alloy, 3 ...... oxidization aluminum layer, 4 ...... aluminum layer.