JP2002119269A - Nut roaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small size bean roaster that has a simple structure, can efficiently roast coffee beans, chest nuts, tea leaves and the like at a low temperature tastily without damage of their plant tissues and is suitable for home brewing, in small-size coffee shops, and test roasting. SOLUTION: The cover of an almost conical shape is fitted to the opening of the metal-made drum body of a cylinder-shaped vessel that has ceramic layers formed inside. The holder having the female threads at the top end and having the material-charging inlet bored on the shaft center is inserted from the opening formed on the upper part of the cover and thread-fastened with the handle having the male thread from the hole bored on the bottom of the drum main body whereby the roaster machine drum is assembled. The roaster machine drum is rotatably supported to the rotary bed so that the material-charging inlet may face toward upper side with the step difference between the groove formed on the outer periphery of the charging inlet and the root of the handle and the rotary bed is made placeable on the table cassette gas ring. For example, coffee beans are charged in the drum and roasted with the table gas ring, as the drum is rotated with the handle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a roaster for roasting coffee beans, chestnuts, tea, herbs, peanuts, seeds, etc., especially for small quantities at home or in small coffee shops, or for tasting. The present invention relates to a handy type roasting machine capable of roasting.

[0002]

2. Description of the Related Art As a method for roasting coffee beans or the like, a method in which a material is put into a metal container formed in a shallow pan shape and heated while stirring the material with a spatula or the like, or a metal drum is used. There is known a kiln type in which a material is charged into a container and heated while rotating. In the method of heating the metal container from the outside with a direct fire, the temperature of the beans is likely to be high and oil inside the beans comes out to the skin, which may be easily oxidized to lower the flavor. On the other hand, the method of heating using hot air requires large-scale equipment, and it has been difficult to roast a small amount at home or in a small coffee shop. In addition, roasted chestnuts are put in a pot and heated, as typified by Tianjin sweet chestnut,
It is common to add chestnuts and heat while stirring with rotating blades, but this method requires a high degree of skill in stirring, including the heating of the stones, the addition of chestnuts, and the addition and mixing of starch syrup, Chestnut roasting and flavor tended to vary.
Furthermore, in roasting of roasted tea, herbal tea, and the like, if the heating temperature is high, the flavor and aroma contained therein may be burned out, and minerals and vitamins may be worn or destroyed.

[0003]

SUMMARY OF THE INVENTION The present invention relates to coffee beans,
It is an object of the present invention to provide a handy-type roasting machine that can roast chestnuts, tea, herbs, peanuts, seeds, and the like at home, in a small-scale coffee shop, or in a tasting, in a small amount easily and with good flavor.

[0004]

Means for Solving the Problems The inventors of the present invention have carefully studied a method of roasting a small amount with good flavor at low temperature. As a result, when a metal drum is heated on a gas stove, the temperature of the flame is about 800.
Since the temperature is ８850 ° C., the temperature of the metal drum also becomes high, and the tissue such as coffee beans put inside breaks.
However, when a ceramic layer is provided inside the metal drum by a plasma coating method or the like and heated, far infrared rays are generated, and the drum surface is about 250 to 280 ° C, and the inner surface of the container is about 200 to 230 ° C. It was found that it was possible to control the temperature to a very low temperature. Further, the amount of generation of far-infrared rays also differs depending on the type of ceramic layer coated on the inside of the metal drum.
The results of measuring the far-infrared emissivity using a 500-type far-infrared spectroradiometer based on the emissivity (100%) of a perfect black body are shown in the table of FIG. Alumina ceramics containing titanium oxide have higher far-infrared emissivity than alumina ceramics containing sodium oxide, and those containing titanium oxide are suitable for roasting coffee beans, chestnuts, peanuts, etc., and those containing sodium oxide Has also been found to be suitable for roasting teas such as roasted tea and herbal tea, which are preferably roasted at lower temperatures.

[0005] Based on the above results, the present invention is intended for home and tasting roasting, which can produce flavored roasts efficiently and at low temperature with a simple structure and without impairing the structure of coffee beans and the like. The measures taken to provide a small roaster are described below. The invention according to claim 1 is provided with a cylindrical drum-shaped metal drum body having a ceramic layer on the inside and a lid corresponding to the drum body, so that coffee beans or the like to be roasted can be put therein, It consists of a rotating table that is rotatably supported using a rotating groove provided on the top of the lid and a shaft part of the handle provided on the bottom of the drum body, and a tabletop from the lower part of the rotating table while rotating the drum with the handle Heating can be performed with a cassette type gas stove or the like.

According to a second aspect of the present invention, the small roasting machine according to the first aspect of the present invention is made easier to handle, and a substantially conical shape is formed at an opening of a cylindrical drum-shaped metal drum body having a ceramic layer inside. A lid having a shape is fitted, and a holder having a female screw part at the tip and a material input port at the center of the rear shaft is inserted from the opening provided at the top of the lid, and the holder is inserted into the bottom of the drum body. The roasting machine drum is assembled by screwing it from the provided hole with a handle having a male screw part, and the material input port faces obliquely upward at the groove provided on the outer periphery of the material input port of the holder and the step at the base of the handle. The rotary table is pivotally supported so that the rotary table can be mounted on a tabletop gas stove or the like.

According to a third aspect of the present invention, an alumina containing titanium oxide or sodium oxide is used as a ceramic layer that efficiently emits far-infrared rays. Also,
The reason why the inside of the metal drum is coated with ceramics in the present invention is that the entire drum main body may be made of ceramics, but taking into account the fragility of ceramics.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a small roasting machine according to the present invention, and FIG. 2 shows a sectional view of a drum. An alumina-based ceramic layer is provided inside the drum body 1 by a plasma coating method. Further, stirring blades 11 are provided at every 120 ° inside the drum so that the contents are uniformly stirred. The opening of the drum body is covered with the cover 2, the holder 3 is inserted through the opening provided at the upper part of the cover, and the edge of the opening of the cover is provided at the step 31 provided at the rear of the holder. And a male screw part 41 provided at the tip of the handle 4 via a hole provided at the bottom of the drum body and a female screw part 32 provided at the tip of the holder.
Screwed. At the rear of the holder, a material input port 33 and a rotary groove 34 for inputting the material to be roasted are provided. The handle has a ring 4 at the bottom of the drum body.
2 is attached, and a rotation step portion 43 is formed. A front support piece 51 having a concave portion 51a pivotally supporting the groove of the holder and a concave portion 52 pivotally supporting a step portion of the handle are provided on the turntable.
A rear support piece 52 having a is provided, and the roasting machine main body 10 is rotatably supported. The front support piece is higher than the rear support piece so that the material inlet of the drum faces obliquely upward. The bottom of the turntable is formed by a ring 53, and is fitted to the pedestal 7 of the tabletop cooktop 6 by a groove 53a provided in the ring. Next, a method of roasting coffee beans using this small roaster will be described. 200 to 500 g of coffee beans are charged into the drum main body from a material input port provided in the holder, and the drum is placed on a tabletop gas stove via a turntable. Ignition the gas stove and heating the drum with the handle 50-85 per minute
It rotates at a speed of about twice. Then, the temperature of the ceramic layer inside the drum becomes 200 to 230 °, and the coffee beans are heated to about 130 to 180 ° and roasted for 20 to 30 minutes. As a result, it was possible to roast savoryly without damaging the structure of the coffee beans. In the case of chestnuts, about 1/3 of the volume of the drum is charged into this drum and heated similarly for about 18 to 20 minutes. Roasted well. Similarly, peanut and pumpkin seeds were roasted in about 15 minutes, and sunflower seeds in about 20 minutes. Roasted tea, herbal tea, sweet tea and the like are also roasted by the roasting machine according to the present invention for 13 to 15 minutes, so that they are roasted by low-infrared rays at a low temperature, so that the fragrance is good, and the effects of minerals and vitamins are excellent. I was As described above, the roasting machine according to the present invention can be easily roasted at home without being limited to the target material.

[0009]

According to the roasting machine of the present invention, since the inner surface of the drum is coated with ceramics, a large amount of far-infrared rays is generated by heating, so that the roasting machine is efficiently and uniformly roasted with a small amount of heat. In addition, since it is a handy type, it is easy to handle and can be roasted simply by placing it on a gas stove. Using a tabletop gas stove has the effect that it can be used anywhere, such as for outdoor use.

[Brief description of the drawings]

FIG. 1 shows an example of a roasting machine according to the present invention.

FIG. 2 shows a sectional view of a drum of a roaster according to the invention.

FIG. 3 shows the shape of a holder.

FIGS. 4A and 4B show a turntable, (A) a front view, (B) a plan view,
(C) A bottom view is shown.

FIG. 5 shows a far-infrared emissivity measurement result.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Roasting machine main body 1 Drum main body 2 Lid 3 Holder 4 Handle 5 Turntable 6 Gas stove 7 Base

Claims (3)

[Claims] A lid is fitted into an opening of a cylindrical drum body having a ceramic layer inside, and a rotating groove provided on an upper portion of the lid and a step portion of a handle attached to a bottom of the drum body. A roasting machine comprising a rotatable rotatable table. 2. A substantially conical lid is fitted to an opening of a cylindrical drum body having a ceramic layer inside.
A handle having a female screw portion at the tip and a material input port at the center of the rear shaft is inserted from an opening provided at the top of the lid, and a male screw is provided through a hole provided at the bottom of the drum body. A rotatable table that is rotatably supported so that the material input port can be turned diagonally upward at the groove provided on the outer periphery of the material input port of the holder and the step at the base of the handle. A roasting machine. 3. The roasting machine according to claim 1, wherein the ceramic layer is made of alumina containing titanium oxide or sodium oxide.