KR100823837B1 - Plate fot generating heat by microwave and vessel having the plate - Google Patents

Abstract

A heating plate and a vessel for a microwave having the same are provided to prevent cracks from being generated in heating and to be manufactured easily. A heating plate comprises graphite, an inorganic binder mixture of silica and alumina, calcium carbonate, and zirconia. The heating plate consists of the graphite with the weight of 10 to 70 %, the silica with the weight of 10 to 60 %, and the alumina with the weight of 10 to 50 %. The mixture of the graphite, the silica, and the alumina has the weight of 100%. A vessel for a microwave having the heating plate includes a cooking container body(10), the heating plate(20), and an inner container(30). The heating plate is mounted on the bottom of the cooking container body to form the mixture of the graphite, the silica, and the alumina. The inner container is attached to the inside of the cooking container body to mount the heating plate.

Description

Heating plate and container for microwave including same {PLATE FOT GENERATING HEAT BY MICROWAVE AND VESSEL HAVING THE PLATE}

The present invention relates to a heating plate that is used in a container for a microwave oven and generates heat by microwaves, and a container for a microwave oven including the same.

In general, a microwave oven cooks a product by irradiating microwaves oscillated by a magnetron to a workpiece, which is a dielectric, inducing exothermic action by friction heat generated by colliding molecules in the workpiece.

However, as described above, the microwave is directly heated by projecting microwaves to the workpiece, so that the food dries during cooking, the taste and aroma is reduced, the outside is dried and burned when cooking frozen foods. There are various problems such as the problem of not being able to cook, the type of roasting.

Therefore, in order to supplement the shortcomings of the microwave oven has been developed a container for a microwave oven having a variety of functions, currently in use. Among these, there are containers having a heating plate that absorbs microwaves and generates heat. Ferrite heating plate is the most common heating plate used for this. It is prepared by hot press curing a ferrite by mixing with a silicone binder.

However, such a ferrite heating plate has a problem that takes a lot of cooking time due to the limit of the heating power. In addition, the ferrite heating plate uses a silicone thermal bonding for the adhesion of the fan and the heating plate, there is also a problem that the container for the microwave oven is damaged when the adhesive silicon and the fan falls off during overheating.

Another heating plate is based on iron scale. In the case of a heating plate mainly made of iron scales, there is a problem in that the heating plate is cracked and the heating plate itself is broken during the heating process. Therefore, the iron scale heating plate has a problem that must be used in a sealed state inside the container for a microwave oven, and if broken inside the container there is a problem that can not be replaced or repaired, the manufacturing of the container itself difficult problem There is also.

The technical problem to be solved by the present invention is to provide a heating plate and a container for a microwave oven comprising the same as graphite as a main material is not cracked or damaged during the heating process, easy to manufacture.

The heating plate of the present invention for solving the above technical problem is formed by firing a mixture of graphite and silica and alumina as graphite as a main material.

In the heating plate of the present invention, the graphite is 10 to 70% by weight, the silica is 10 to 60% by weight, the alumina is mixed in a ratio of 10 to 50% by weight, the sum of the graphite, silica and alumina is 100% by weight Is preferably.

In addition, calcium carbonate may be further mixed with the heating plate, and zirconia may be further mixed with the heating plate.

On the other hand the container for a microwave oven of the present invention for achieving the above technical problem, a cooking vessel body; A heating plate mounted to a bottom surface of the cooking vessel body and formed by firing a mixture of graphite, silica, and alumina; It includes; inner container in close contact with the inner surface of the cooking container body in the state that the heating plate is mounted.

And it is preferable that the container for microwave oven further includes the cover which covers the upper side of the said cooking container body, since it can ensure completeness of cooking.

Here, the cover, the cover body; A cover side heating plate mounted inside the cover body and formed by firing a mixture of graphite, silica, and alumina; It is preferable to include a; cover container which is in close contact with the inner surface of the cover body in the state that the cover side heating plate is mounted.

In addition, at least one of the inner container or the cover container in the microwave container of the present invention is preferably detachably mounted from the cooking container body or the cover body, it is preferable to convenient cleaning and use of the container.

The heating plate of the present invention has the advantage that the manufacturing cost is low, the manufacturing process is simple, does not break during the heating process, and can reach a high temperature in a short time by using graphite as a main material. Therefore, a container for a microwave oven including the same may have various structures, and has an advantage of significantly reducing cooking time by greatly reducing cooking time.

Hereinafter, with reference to the accompanying drawings will be described in detail a specific embodiment of the present invention.

The heating plate according to the present embodiment is formed by molding and firing a mixture of graphite, silica, and alumina.

Here, graphite is a material that absorbs microwaves and generates heat, and has a proportion of 10 to 70% by weight of the total weight. If the ratio of graphite is 10% by weight or less, there is a problem that heat generation is not normally performed. According to the test results, when the graphite is 10% by weight, it is heated to about 150 to 200 ° C. when heated in the microwave for 5 minutes, which shows that the exothermic characteristics are much lower than the general temperature of 500 ° C.

On the other hand, when the proportion of graphite is 70% or more, molding is difficult. Graphite powder itself has a property of not being agglomerated or difficult to form. Therefore, other binders and the like are mixed and molded. If the ratio of graphite is too high, the ratio of the other binders is relatively low, resulting in poor moldability.

In addition, the graphite used as the main material in the present embodiment can not only use coal, charcoal or graphite mined in nature and graphite waste collected from dust in the factory, but also can be obtained from various kinds of graphite which are already disposed of and then discarded. The cost is low and eco-friendly.

Next, the mixture of silica and alumina serves as a binder to be injected to form a difficult-to-form graphite powder into a certain form. First, silica is added at a rate of 10 to 60% by weight of the total weight. When the ratio of silica is 10% by weight or less, there is a problem that molding is difficult, and when 60% or more, the manufactured heating plate may be broken, and the heat generation characteristics of the heating plate are inferior.

Next, alumina is a soil component used for manufacturing ceramics in general, and serves to improve molding characteristics of the heating plate and prevent the heating plate from being broken during the heating process. To this end, the alumina is mixed in a proportion of 10 to 50% by weight. If the alumina is less than 10% by weight, the moldability is inferior, and if more than 50% by weight there is a problem that the exothermic properties are lowered.

And calcium carbonate may be further mixed in the heating plate of the present embodiment. This calcium carbonate prevents excessive heat from being generated by the graphite and controls the exothermic characteristics. Therefore, the calcium carbonate is added in an appropriate amount, for example, about 10% by weight, to prevent food burning due to too much heat during cooking.

This calcium carbonate may be replaced by zirconia. At this time, the content of zirconia may be added in an appropriate amount, such as about 10% by weight, like calcium carbonate.

Hereinafter, a method of manufacturing the heating plate of this embodiment will be described.

First, as described above, powders of graphite, silica, alumina and calcium carbonate are prepared. Then, the prepared powder is mixed and mixed in proportion. Mold the dough to form the heating plate. In this case, the shape of the heating plate may be a disk shape, a bowl shape, various shapes are possible. In addition, the method of molding a dough may use a general ceramic molding method, or may be molded using a press.

The molded heating plate is aged at room temperature for about 2 days. And it bakes at the temperature of 800-1300 degreeC. Of course, a certain glaze may be coated on the surface of the heating plate before firing. The coating liquid may be a general ceramic coating liquid. In addition, the predetermined process may be divided into primary and secondary, the primary may proceed at a temperature of about 900 ℃, the secondary firing may proceed at a temperature of 1200 ℃.

Next, the microwave oven container according to the present embodiment will be described.

As shown in FIG. 1, the container for a microwave oven according to the present embodiment includes a cooking vessel body 10, a heating plate 20, an inner container 30, a cover body 40, and a cover side heating plate 50. It comprises a container 60.

First, the cooking vessel body 10 forms the overall shape of the container for a microwave oven according to the present embodiment, and may be formed of plastic or the like. And a heating plate mounting groove 12 on which the heating plate 20 is to be mounted may be further formed inside the bottom surface of the cooking vessel body 10. The heating plate mounting groove 12 is further provided with a heat insulating plate (not shown in the drawing) to insulate the heating plate 20 and the cooking vessel body 10, and to send heat generated in the heating plate 20 to the food direction to increase the thermal efficiency. It may be.

Next, the heating plate 20 is mounted to the cooking vessel body 10 in the form of being inserted into the heating plate mounting groove 12. At this time, since the heating plate 20 is substantially the same as that described above, it will not be repeated. In the state in which the heating plate 20 is mounted, the inside of the bottom surface of the cooking vessel body 10 is generally flat.

And the inner container 30 is in close contact with the inner surface of the cooking container body 10, is a component that contains the actual food. The inner container 30 is mounted on the upper portion in the state where the heat generating plate 20 is mounted. In this embodiment, the inner container 30 has a structure that can be separated from the cooking vessel body 10. Therefore, the inner container 30 can be separated and washed separately, and if only the inner container is damaged, only the inner container 30 may be replaced. The inner container 30 may be made of various materials, but steel materials are preferable because they have to have constant heat resistance.

The lid is then a component covering the upper side of the cooking vessel body. The cover is composed of a cover body 40, a cover side heating plate 50, and a cover container 60. First, the cover body 40 forms the shape of the overall cover, it may be made of a material such as plastic. In addition, the inner surface of the cover body 40, as shown in Figure 2, the heating plate mounting groove 42 may be formed. In addition, the heating plate mounting groove 42 may be further provided with a heat insulating plate (not shown), the cover side heating plate 50 is inserted and mounted. This heating plate 50 is also substantially the same as that described above.

Next, the cover container 60 is a component in close contact with the inner surface of the cover body in a state in which the cover side heating plate 50 is mounted on the cover body 40. The cover container 60 may also be made of a material such as steel, and has a structure detachable from the cover body 40.

1 is an exploded perspective view of a container for a microwave oven according to an embodiment of the present invention.

Figure 2 is an exploded perspective view of a container cover for a microwave oven according to an embodiment of the present invention.

Claims (12)

A heating plate for a microwave oven formed by firing a mixture of graphite and an inorganic binder. The method of claim 1, wherein the inorganic binder, A heating plate for a microwave oven, characterized in that the mixture of silica and alumina. The method of claim 2, The graphite is 10 to 70% by weight, the silica is 10 to 60% by weight, the alumina is mixed at a ratio of 10 to 50% by weight, the sum of the graphite, silica and alumina is characterized in that the electron is 100% by weight Heating plate for stove. The method of claim 3, A heating plate for a microwave oven, characterized in that calcium carbonate is further mixed. The method of claim 3, A heating plate for a microwave oven, characterized in that zirconia is further mixed. Cooking vessel body; A heating plate mounted to the bottom surface of the cooking vessel body and formed by firing a mixture of graphite, silica, and alumina; And an inner container in close contact with an inner surface of the cooking container body in a state where the heating plate is mounted. The method of claim 6, The graphite is 10 to 70% by weight, the silica is 10 to 60% by weight, the alumina is mixed at a ratio of 10 to 50% by weight, the sum of the graphite, silica and alumina is characterized in that the electron is 100% by weight Container for microwave oven. The method of claim 7, wherein A container for a microwave oven, wherein calcium carbonate is further mixed. The method of claim 7, wherein A container for a microwave oven, wherein zirconia is further mixed. The method according to any one of claims 7 to 9, Microwave container further comprises a cover for covering the upper side of the cooking vessel body. The method of claim 10, wherein the cover, Cover body; A cover side heating plate mounted inside the cover body and formed by firing a mixture of graphite, silica, and alumina; And a cover container which is in close contact with the inner surface of the cover body while the cover side heating plate is mounted. The method of claim 11, At least one of the inner container or the lid container is microwave oven container, characterized in that detachably mounted from the cooking vessel body or the lid body.

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