JPH01211883A - Electric cooking utensil - Google Patents

Abstract

PURPOSE:To improve the far infrared ray radiation effect by constituting an inner frame with an aluminum zinc-plated steel plate and forming a far infrared ray radiation layer on the surface of a crystal glass tube to obtain a heater. CONSTITUTION:The inner frame 2 of an oven toaster 1 is made of an aluminum zinc alloy-plated steel plate with excellent heat reflection characteristic. Far infrared ray radiation layers 8b and 9b using zircon and alumina as a far infrared ray emitting material are formed on the surfaces of crystallized glass tubes 8a and 9a of an upper heater 8 and a lower heater 9, heating wires 10 and 11 are arranged at the center. A far infrared ray emitting paint mixed with the above far infrared ray emitting material, alkoxylane as a binder, methanol and isopropyl alcohol as a solvent, titanium oxide as a coloring agent is coated on the surfaces of the crystallized glass tubes 8a and 9a blast-processed in advance with a sprayer then baked at 150 deg.C. The radiation characteristic in the far infrared ray radiation region and the reflection characteristic are thereby excellent, the far infrared ray radiation effect is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to electric cooking appliances such as toaster ovens and electric ovens, and more particularly to electric cooking appliances equipped with heaters that utilize far-infrared radiation.

Conventional technology Traditionally, electric cookers such as toaster ovens and electric ovens have been used to cook not only bread but also rice cakes and cutlets.

It is used for baking pizza, gratin, etc., and recently it has often appeared on the market as an alternative to conventional bread toasters.

Such toaster ovens and electric openers include: - Inside the shell, there is an inner casing that forms a cooking chamber in the outer cylinder, an upper heater and a lower heater arranged above and below the cooking chamber, and a It has a structure that includes a front opening f, a door to cover, and a grid for placing cooking items that is linked to the opening/closing operation of the door.

Furthermore, as the upper heater and the lower heater, those in which a coiled heating wire is disposed in the center of a tubular member made of quartz or crystallized glass (trade name: Miraclon) have been mainly used.

Recently, various electric cookers equipped with heaters that utilize far-infrared radiation have appeared on the market, and even in electric cookers such as toaster ovens and electric openers, there is a remote Various proposals have been made to form and use an infrared emitting layer.

The present inventors have also proposed an electric cooker using a quartz tube heater or a crystallized glass tube heater formed with a far-infrared radiation layer containing a far-infrared radiation material as an upper heater or a lower heater.

Problems to be Solved by the Invention However, the electric cooker equipped with a heater formed with a far-infrared radiation layer, which has already been proposed, has problems with far-infrared radiation when cooking menu items that require a relatively long cooking time, such as grilled foods. Although some effects can be obtained in terms of roasting time and taste, no significant effects could be expected for cooking menus that require a very short cooking time, such as toast.

The present invention has been made in order to solve the above-mentioned conventional problems, and an object of the present invention is to provide an electric cooking device with a far-infrared radiation effect higher than that of gold.

Means for Solving All the Problems In order to solve all the above problems, the present invention comprises an inner casing forming a cooking chamber inside the outer casing of an aluminum-zinc alloy plated steel plate with excellent heat reflection properties, and A far-infrared heater formed by forming a far-infrared radiation layer on the surface of a crystallized glass tube is used as a heater disposed in the cooking chamber.

Moreover, the far-infrared heater in the present invention uses zircon and alumina as the far-infrared radiating material.

By applying far-infrared paint using alkoxylan as a binder, methanol and isopropyl alcohol as a solvent, titanium oxide as a coloring agent, and potassium titanate fiber as a reinforcing material to the surface of a crystallized glass tube and baking it. , a far-infrared emitting layer is formed.

Function Conventionally, an aluminized steel plate has been mainly used as the inner casing forming the cooking chamber. This is because aluminized steel sheets have excellent heat reflection properties, are inexpensive, and have excellent corrosion resistance.

However, compared to this aluminized steel sheet, the aluminum-zinc alloy plated steel sheet used in the present invention has even better heat reflection properties, and has a far-infrared radiation layer formed on the far-infrared heater. Infrared rays can be applied to food more efficiently. For this reason, remarkable effects can be obtained compared to conventional electric cookers using aluminized steel plates.

On the other hand, far-infrared emitting paint uses alkoxylan as a binder, and by using hydrolysis,
A far-infrared emitting layer can be easily formed by heat treatment at a relatively low temperature of 00 to 200°C. Therefore, it can be obtained at a very low cost.

In addition, since zircon and alumina, which have excellent radiation characteristics in the far-infrared region, are used as far-infrared radiating materials, bread is mainly cooked in electric cookers such as toaster ovens.

Matches well with starchy foods such as mochi and sweet potatoes.

Furthermore, titanium oxide is used as a coloring agent, and the overall color is yellowish, giving it a new image that is different from conventional heaters using crystallized glass tubes. By the time the heater temperature stabilizes, the product will not give any discomfort and will look beautiful and exhibit a warm pink color, improving its marketability.

On the other hand, this far-infrared paint contains potassium titanate fibers as a reinforcing material, and the alkoxylan used as a binder has a coefficient of thermal expansion similar to that of the base material, the crystallized glass tube. Since the far-infrared rays are converted into silicon oxide, the far-infrared radiation layer formed by this far-infrared paint exhibits excellent heat resistance and thermal shock resistance.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In Figures 1 to 3, 1 is the outer casing of the toaster oven, and 2 is the inner casing of the toaster oven.The inner casing 2 is made of aluminum-zinc alloy plated steel plate and has an open front. Three cooking chambers are fully formed. Reference numeral 4 denotes a door that covers the front opening of the cooking chamber 3. The door 4 is pivoted at its lower end so that it can be opened and closed freely, and a V% finder glass is incorporated therein. Reference numeral 5 denotes a net for placing food to be prepared in the cooking chamber 3, and this net 6 is slidably supported so that it can move in and out to the front side.
! It is connected to the door 4 through the l-way, and is designed to go in and out in conjunction with the opening and closing of the door 4.

7 is a bottom plate of the cooking chamber 3, and this bottom plate 7 can also be opened and closed.

Reference numerals 8 and 9 denote a soil heater and a lower heater arranged in the cooking chamber 3, and the upper heater 8 and the lower heater 9 have zircon and alumina as far-infrared radiating materials on the surfaces of crystallized glass tubes 81L and 91L. Far-infrared radiation layers 8b and 9b are formed, and heating wires IQ and 11 are arranged in the center.

The far-infrared radiation layers sb and 9b are made of the above-mentioned zircon and alumina as far-infrared radiation materials, alkoxyla y as a binder, methanol and Improvil alcohol as a solvent, titanium oxide as a coloring material, and potassium titanate as a coloring material. Formed by spraying a far-infrared emitting paint prepared by using fiber as a reinforcing material onto the surface of pre-plasted crystallized glass tubes 82L and 91L, and then baking at 160°C. The composition after burning is as shown in Table 1.

Table 1 To evaluate the effect of far-infrared radiation from a toaster oven having such a configuration, toast was cooked.

For comparison, as a conventional example, when the inner casing 2 is made of an aluminized steel plate and the upper and lower heaters 8° 9 are not formed with far-infrared radiation layers ab and sbQ, As a comparative example, the inner casing 2 is made of an aluminized steel plate, and the far-infrared radiation layer 8b is used as the upper and lower heaters 8.9.

9b was also used and evaluated.

The evaluation was performed by measuring the time required to bake six slices of bread to a predetermined color.

The above results are shown in Table 2.

Table 2 As shown in Table 2, while the conventional toaster oven required 3 minutes and the comparative example toaster oven required 2 minutes 46 seconds, the toaster oven of the present invention required 2 minutes 30 seconds. , a remarkable effect was obtained.

Further, according to the toaster oven of the present invention, the toasted bread has a dark brown surface, a thin burnt layer, and is baked with a lot of moisture inside, so it is very delicious.

On the other hand, in addition to toast cooking, a similar comparison was made for baking foods, and when the toaster oven of the present invention was used, a remarkable far-infrared ray effect was obtained compared to the conventional or comparative toaster ovens. The inside of the sweet potato was cooked through, making it very sweet.

In addition, in order to evaluate the coating film of the far-infrared radiation layer, the surface temperature of the heater was set to approximately 800℃, and the power was turned on for 3 minutes and then stopped for 1 minute.
When an intermittent energization test was conducted, no peeling phenomenon of the far-infrared radiation layer was observed even after 20,000 cycles or more, demonstrating excellent adhesion strength.

In this way, instead of the conventional aluminized steel plate, an aluminum/zinc alloy plated steel plate is used for the inner casing.
Furthermore, by using a conventional crystallized glass tube with 1m' of far-infrared radiation containing zircon and alumina formed on its surface as a heater, it is possible to obtain an electric cooker with even higher far-infrared radiation effects. did it.

In the embodiments of the present invention, a heater using a crystallized glass tube is used, but the heater is not limited to this, and a quartz tube may also be used.

Furthermore, even if a treatment plate with a self-purification function is installed on the side of the inner casing, the same far-infrared radiation effect as in the present invention can be obtained, so even if these treatment plates with a self-purification function are used together. good.

Furthermore, as the composition of the far-infrared emitting layers 8b and 9b, the first
Although the composition shown in the table has been described, the composition is not particularly limited to this one, and any composition can be used as long as the properties as a heater such as heat resistance and thermal shock resistance are not impaired.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention,
The inner casing, which forms a cooking chamber within the outer casing, is made of an aluminum-zinc alloy plated steel plate with excellent heat reflection properties, and a heater placed inside the cooking chamber is placed far away from the surface of the crystallized glass tube. A far-infrared heater formed with an infrared radiation layer is used, and the far-infrared heater further includes zircon and alumina as the far-infrared radiation material, alkoxylan as the binder, methanol and isopropyl alcohol as the solvent, and coloring. Titanium oxide as a material,
Far-infrared ray paint using potassium titanate fiber as a reinforcing material is applied to the surface of the crystallized glass tube and baked to form a far-infrared radiation layer, allowing electric cooking with enhanced far-infrared radiation effects. equipment can be provided.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an open toaster oven showing an embodiment of the present invention, Fig. 2 is a side sectional view of the toaster oven, and Fig. 3 is a cutaway front view of a heater used in the open toaster oven. It is a diagram. 1...outer casing, 2...inner casing, 3...
...Gooking room, 8.9...Heater, aa, e
a. Old... Crystallized glass tube, 8b, 9b... Far infrared radiation layer. Name of agent: Patent attorney Toshio Nakao and one other person

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Claims (2)

[Claims] (1) The inner casing that forms the cooking chamber within the outer casing is made of aluminum-zinc alloy plated steel plate with excellent heat reflection properties, and the heater installed in the cooking chamber is made of crystallized glass tubes. An electric cooker that uses a far-infrared heater with a far-infrared radiation layer formed on its surface. (2) The far-infrared heater uses zircon and alumina as the far-infrared radiating material, and alkoxylan as the binding material.
A far-infrared radiation layer is formed by applying far-infrared paint using methanol and isopropyl alcohol as a solvent, titanium oxide as a colorant, and potassium titanate fiber as a reinforcing material to the surface of a crystallized glass tube and baking it. An electric cooker according to claim 1, comprising: