JP2012228350A - Cooker for removing nitrate nitrogen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove nitrate nitrogen by not soil improvement of a field but by a cooker when cooking vegetables and rice containing nitrate nitrogen.SOLUTION: This cooker includes an earthen pot whose surface is coated with glaze including several % of mineral that contains silica of 70% or more, and a heating means for heating the earthen pot. The earthen pot is used for cooking rice or vegetables including nitrate nitrogen. Alternatively, this cooker includes a metal pot whose surface is coated with fluororesin including several % of mineral that contains silica of 70% or more, and a heating means for heating the metal pot. The metal pot is used for cooking rice and vegetables including nitrate nitrogen.

Description

  The present invention relates to a cooker and similar appliances that decompose and remove nitrate nitrogen contained in vegetables, rice, and the like.

  Currently, when cultivating rice and vegetables on cultivated land such as fields, organic matter is often used for fertilizer, and rice and vegetables grow by absorbing nitrate nitrogen from this organic matter, but excess nitrate nitrogen If left over, nitrate nitrogen is taken into the body by eating these vegetables. This nitrate nitrogen is reduced in the body, reacts with protein in the body as nitrite nitrogen, and becomes carcinogenic nitrosamine, which damages cells.

  Current commercial vegetables, especially leafy vegetables, are normal with thousands of ppm residual nitrate nitrogen. In water, ammoniacal nitrogen produced mainly by the decomposition of proteins and the like is further biochemically oxidized.

  In Patent Document 1, in order to prevent ammonia nitrogen and nitrate nitrogen contained in soil such as fields from being absorbed by crops, calcium, magnesium hydroxide, iron, manganese, copper, zinc, An invention in which boron and molybdenum are included in an atomic state and the soil is improved by using a plant-growing mineral material formed into a composite hydroxide granule to prevent absorption of nitrate nitrogen and the like by agricultural crops. It is.

JP 2006-306683 A

  However, although the invention according to Patent Document 1 improves soil and removes nitrate nitrogen and the like, the area of the field for producing vegetables and rice is enormous, and soil improvement of all fields is performed. It is not possible. In addition, the cost is enormous.

  Therefore, the present invention aims at removing nitrate nitrogen with a cooking device when cooking vegetables and rice containing nitrate nitrogen, rather than improving soil in a field.

  According to the first aspect of the present invention, there is provided a cooking utensil comprising a clay pot coated with a glaze containing several percent of a mineral containing at least 70% silicon on the surface, and heating means for heating the clay pot. Can be achieved.

  According to a second aspect of the present invention, there is provided a cooking utensil comprising a metal pan having a surface coated with a fluororesin containing several percent of a mineral containing at least 70% silicon, and heating means for heating the metal pan. Can be achieved by providing.

  According to a third aspect of the present invention, the earthen pan or the metal pan is a cooking utensil used for cooking rice or vegetables containing nitrate nitrogen.

  Further, according to a fourth aspect of the present invention, the mineral comprises nitrogen (N), phosphorus (P), potassium (K), hydrogen (H), carbon (C), calcium (Ca), magnesium (Mg ), Sulfur (S), and a small amount of copper (Cu), zinc (Zn), manganese (Mn), iron (Fe), and boron (B).

  ADVANTAGE OF THE INVENTION According to this invention, the cooking utensil which can decompose | disassemble and remove nitrite nitrogen etc. which are contained in vegetables and rice easily by boiling and cooking vegetables and rice containing nitrate nitrogen and nitrite nitrogen Is to provide.

It is sectional drawing which shows the structure of the electromagnetic induction heating cooking appliance used by this embodiment. It is a figure explaining the structure of a clay pot. It is a figure which shows the cross-sectional structure of a clay pot. It is a figure of the measurement result which shows the removal effect of nitrate nitrogen of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a cross-sectional view showing a configuration of an electromagnetic induction heating cooker used in the present embodiment. In addition, this example demonstrates using the example of an electromagnetic induction heating rice cooker as an electromagnetic induction heating cooker.
The electromagnetic induction heating rice cooker 1 is composed of a main body 2 and a lid 3, and a clay pot 4 is provided in the main body 2. A heating coil 5 for electromagnetic induction heating is disposed on the lower surface of the earthenware pot 4.

  The heating coil 5 is swirled in a spiral shape and connected in series to a high-frequency power source. A high-frequency current is supplied to the heating coil 5 and is driven and controlled by a control unit (not shown). In addition, a magnetic body 6 is disposed at the position of the earthenware pot 4 adjacent to the heating coil 5. As the magnetic body 6, an iron-based material having magnetism, for example, a material such as stainless steel (SUS430) is used. When a current is passed through the heating coil 5, an eddy current is generated in the magnetic body 6, generating heat and heating the earthenware pot 4.

  In FIG. 1, the magnetic body 6 is shown in a band shape, but the magnetic body 6 extends in a direction perpendicular to the paper surface of FIG. 1, and the magnetic body 6 is widely disposed on the bottom surface of the earthenware pot 4. Heat.

  On the other hand, FIG. 2 is a figure which shows the structure of the earthenware pot 4 used for the electromagnetic induction heating rice cooker 1 of the said structure. The earthenware pot 4 is comprised with the main body 7 which shape | molded the clay material, and is comprised by the surrounding wall 7b formed in the circumference | surroundings of the bottom wall 7a and the bottom wall 7a. Specifically, clay is molded into the mold of the main body 7, and rectangular recesses 8a, 8b, and 8c are formed on the outer surface (lower surface) of the bottom wall 7a. Further, the magnetic body 6 having a shape that fits into the recesses 8a, 8b, and 8c and has a thickness substantially the same as the depth of the recesses 8a, 8b, and 8c is used as the recesses 8a, 8b, and 8c of the bottom wall 7a. Fits and adheres to.

  The clay thus molded is baked to perform unglazing. The inner surface 9 of the main body 7 of the clay pot 4 subjected to the unglazed baking is roughened with sandburt or the like, and the glaze 10 is applied to the inner surface 9. Here, the glaze 10 is mixed with a mineral 11 containing, for example, 90% or more of silicon (Si), and the powder of the mineral 11 is contained in the glaze 10. Moreover, the content rate of the mineral 11 with respect to the glaze 10 is 5%, for example.

Accordingly, the glaze 10 containing Si is applied to the inner surface of the clay pot 4 (main body 7) that has been baked, and the clay pot 4 is fired again in this state.
FIG. 3 is a cross-sectional view taken along the line AA ′ of the clay pot 4 (7) shown in FIG. As shown in the figure, the surface 12 of the earthenware pot 4 (main body 7) is roughened by sandblasting, and a glaze 10 containing silicon (Si) is applied thereon.

  By processing in this way, the electromagnetic induction heating rice cooker 1 which uses the earthenware pot 4 which contains silicon (Si) on the upper surface can be provided. Therefore, for example, by using this electromagnetic induction heating rice cooker 1 to cook rice, even if the rice contains nitrate nitrogen, the amount is reduced to about 1/3 to 1/5 of the original amount. Can be reduced.

  Moreover, although the electromagnetic induction heating rice cooker 1 was demonstrated in description of the said embodiment, it can apply not only to the electromagnetic induction heating rice cooker 1 but all the cookers which employ | adopt an electromagnetic induction heating system. Therefore, even when cooking vegetables using the cooker using the earthenware pot 4 of this example, even if the vegetables contain nitrate nitrogen, the amount is reduced to 1/3 to 1 of the original. Can be reduced to about / 5.

  Therefore, according to this example, even vegetables and rice containing nitrate nitrogen can be easily changed to safe foods simply by boiling the vegetables and rice using the cooker using the clay pot 4. Can do.

  In addition, compared with the case of soil improvement for producing vegetables and rice, the problems of nitrate nitrogen and nitrite nitrogen can be solved very easily, which is advantageous in terms of cost.

  Moreover, it is not restricted to the earthenware pot 4, For example, even if it is a metal pot, the cooking appliance except nitrate nitrogen is realizable similarly. In this case, for example, when performing fluorine coating on an aluminum base material, the same effect can be obtained in a metal pan by coating silicon (Si), for example, a mineral containing 70% or more in a fluororesin. Can be obtained.

  In the description of the above embodiment, the glaze 10 containing the Si-containing mineral 11 is applied to the inner surface of the earthenware pot 4 (main body 7). However, when the main body 7 of the earthenware pot 4 is made of clay, the mineral containing Si is used. 11 may be kneaded and unbaked. Using the earthenware pot 4 configured in this manner, it is possible to easily change to a safe food simply by boiling vegetables and rice.

  Moreover, when making the main body 7 of the earthenware pot 4 with clay, many more recessed parts may be formed, the said mineral 11 may be fitted and fixed to the said recessed part, and the earthenware pot 4 may be produced. Even when the earthenware pot 4 configured in this way is used, it can be easily changed to a safe food simply by boiling vegetables and rice.

  In addition, when silica is used instead of the fluororesin, the mineral may be included in an amount of about 1 to 10%, and in the case of ceramic, the mineral may be included in an amount of about 1%.

  Further, the mineral 11 contains 70% or more of silicon (Si) as described above. As other components, for example, nitrogen (N), phosphorus (P), potassium (K), hydrogen ( H), carbon (C), calcium (Ca), magnesium (Mg), sulfur (S) and further small amounts of copper (Cu), zinc (Zn), manganese (Mn), iron (Fe), and boron (B) and the like, including a dozen elements.

Finally, FIG. 4 shows the result of the nitrate nitrogen removal test of this example when using the cooker of this example and using, for example, komatsuna as the test material. As shown in the figure, nitrate nitrogen, which was 6,700 ppm at the start of the test, decreased to 4,500 ppm after 30 minutes, decreased to 3,500 ppm after 1 hour, and further 2 hours after 2 hours. Reduced to 900 ppm. Therefore, the nitrate nitrogen removal effect of the cooker using the earthenware pot 4 of this example was remarkably measured.
In addition, the measurement of nitrate nitrogen contained in Komatsuna was measured by taking out a certain amount of Komatsuna from the cooker, grinding and measuring with a measuring instrument at each time.

DESCRIPTION OF SYMBOLS 1 ... Electromagnetic induction heating rice cooker 2 ... Main body 3 ... Cover part 4 ... Earthenware pot 5 ... Heating coil 6 ... Magnetic body 7 ... Main body 7a ... Bottom wall 7b ... Peripheral walls 8a, 8b, 8c ··· concave portion 9 · · · inner surface 10 · · glaze 11 · · mineral 12 · · surface

Claims (5)

A clay pot coated with a glaze containing several percent of a mineral containing at least 70% silicon on the surface;
Heating means for heating the clay pot;
Cooking utensils with A metal pan coated with a fluororesin containing several percent of a mineral containing at least 70% silicon on the surface;
Heating means for heating the metal pan;
A cooking utensil comprising:   The cooking utensil according to claim 1, wherein the clay pot is used for cooking rice or vegetables containing nitrate nitrogen.   The cooker according to claim 2, wherein the metal pan is used for cooking rice or vegetables containing nitrate nitrogen.   The said mineral contains nitrogen, phosphorus, potassium, hydrogen, carbon, calcium, magnesium, sulfur, and further contains a small amount of copper, zinc, manganese, iron, and boron. Or the cooking utensil described in 4.

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