JPH0718342Y2 - Infrared roast dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an infrared roast dryer for roasting and / or drying foods using an infrared heater.

(Prior Art) Conventionally, in a food roasting / drying apparatus, a metal porcelain is heated by an open flame, and foods such as grains, beans, and fish are placed on it to roast and dry. Also, for commercial use, food was placed in a round or square drum-shaped container, the heating power was adjusted while heating the container with an open flame, and roasting and drying were performed. Recently, there is a container in which a ceramic or the like is placed or the entire container is made of ceramic.

(Problems to be Solved by the Invention) However, since the apparatus roasts and dries at a very high temperature, the taste of food is impaired and roasting and drying unevenness are likely to occur.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides an infrared ray radiated from infrared heaters arranged above and below while conveying a to-be-roasted substance or a to-be-dried substance by a conveying means. Roasting and / or drying by

In addition, it is preferable that the infrared heater is provided with a semicircular moon-shaped reflector on its back so that the infrared radiation direction is concentrated in a certain direction so that roasting and drying can be efficiently performed.

Further, it is preferable that the conveying means is a straight-line feeder composed of a metal plate with a slight inclination and a vibrator for driving the metal plate, and the straight-line feeder allows food to go straight. By doing so, it is possible to uniformly roast and dry, and by adjusting the time and vibration of the food product, the same result as on the conveyor can be obtained, and the workability and efficiency can be greatly improved.

Further, the blackness of the metal plate of the conveying means is usually set to 0.1 to 1, but it is most efficient to make it black as shown in the examples. This is because when the metal plate is used as it is, the infrared rays emitted from the lower heater are reflected by the metal plate and do not contribute to the roasting and drying of the food to be processed. This is because by making the metal plate black so that the metal plate is transmitted, infrared rays radiated from the lower heater are directly applied to the food, and the heat energy radiated from the metal plate is directly contributed to roasting and drying. . As the type of metal, iron, cast iron, or ferroalloy is preferable in the case of roasting, and aluminum, aluminum alloy, copper, or copper alloy is most preferable in the case of drying, but it is not necessary to be particular about this. This is because, when electromagnetic waves are absorbed, the heat generation temperature differs depending on the type of metal and the same energy even if the energy is the same.

Further, a food feeding hopper is provided at one end side of the conveying means, and a roller or a brush is arranged above the metal plate at a predetermined distance downstream from the outlet of the food feeding hopper to uniformly arrange the food. You may send it out.

The infrared heaters arranged above and below the metal plate are provided with a reflection plate,
Those having a lower limit of 1.5 μm to 2 μm are preferable, and the temperature is controlled by controlling the power supplied to the infrared heater.
It is preferable to adjust the temperature to 200 ° C. to 500 ° C. and to adjust the infrared radiation amount depending on the food. The reflector may be made of a metal having a mirror surface, but aluminum is most suitable.

The infrared heaters may be arranged either in series or in parallel with the extending direction of the metal plate. It is desirable to use a linear feeder as the vibrator, and the magnitude of vibration may be adjusted according to the size of the metal plate.

(Operation) When a dried material to be roasted (roasted material or dried material), for example, brown rice, is supplied to the transfer means by the hopper, it is piled up and transferred to the downstream side. However, by configuring the conveying means with a slanted metal plate and a vibrator, brown rice and the like are further leveled by the synergistic action of the vibration motion of the metal plate and the action of gravity due to the slant, and
Since it is turned upside down, all brown rice etc. are directly irradiated to the far infrared rays from the upper infrared heater. Further, by arranging a plurality of infrared heaters above and below the carrying means along the carrying direction, the unevenness of infrared radiation due to the narrow radiation area of one infrared heater is substantially eliminated, and the infrared heater on the carrying means is eliminated. Infrared rays are uniformly radiated to brown rice and the like. Further, by imparting a predetermined degree of blackness to the metal plate, the infrared rays emitted from the infrared heater below pass through the metal plate and are radiated to brown rice etc. on the metal plate, thus directly contributing to roasting and drying. . Therefore, since brown rice and the like are irradiated with infrared rays from both upper and lower heaters and are continuously stirred while being vertically stirred, they are roasted uniformly and evenly. Also, by providing rollers or brushes, since brown rice and the like are transported in a layered manner rather than in a layered manner on the upstream side of the transport means, infrared rays are radiated from the upper and lower directions to individual brown rice and the like from the initial stage. Therefore, the roasting and drying are more effectively performed and the roasting is performed more uniformly in a short distance. Further, by providing a reflection plate on the infrared heater so as to face the metal plate and reflecting the infrared light to the metal plate side, it becomes possible to further improve the heating efficiency.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

(Example) In the illustrated apparatus, the rod-shaped 600 W infrared heaters 1 are arranged in series on the upper side and on the lower side, respectively, 10 in number, and the outside of the infrared heater 1 has a width of 20 cm and a height of 6 cm. A semi-circular aluminum reflector 7 is installed, and the distance between the upper and lower heaters is 15
In the middle part, i.e. 7.5 cm, with a thickness of 2 mm,
Two black iron plates having a width of 22.5 cm and a length of 2 m are arranged in parallel, and a straight feeder 3 is attached to each iron plate 2. A hopper 4 is disposed above one end of the iron plate 2, an outlet of the hopper 4 is surrounded, and a fall prevention frame 5 is provided along the edge of the iron plate 2, and a cylindrical roller 6 having a diameter of 30 cm is provided on the downstream side thereof. It is installed so that brown rice is evenly arranged on the iron plate 2. The voltage of the straight feeder 3 was adjusted, the conveying speed was set so that the iron plate 2 of 2 m could flow in 5 minutes, the heater temperature was adjusted to 420 ° C., and brown rice was roasted. The distance between the cylindrical roller 6 and the iron plate 2 was 3 cm. The level difference between the inlet side and the outlet side of brown rice due to the inclination of the iron plate 2 was 5 cm.

Under the above conditions, 15 kg of brown rice could be roasted evenly per hour.

(Effect of Device) As is clear from the above description, the infrared roasting / drying machine according to the present invention directly heats food with infrared rays,
Even roasting and drying can be performed evenly, and the degree of roasting varies depending on the type of the same food product, so it is possible to select that type.

Also, it can be used as a commercial roaster or dryer and directly heats food without heating the machine as in the past, resulting in good heating efficiency and a simple structure. It is also unnecessary to prevent heat loss by stretching around.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of a roasting / drying machine according to the present invention. 1 ... Infrared heater, 2 ... Iron plate, 3 ... Feeder, 4 ... Hopper, 5 ... Frame, 6 ... Cylindrical roller, 7 ... Reflector.

Claims (4)

[Scope of utility model registration request] 1. A transport means for transporting a dried product to be roasted, and a plurality of infrared heaters arranged above and below the transport means, respectively, along the transport direction, wherein the transport means is arranged in an inclined manner. An infrared roasting / drying machine, which is a linear feeder comprising a metal plate provided and a vibrating vibrator for vibrating the metal plate, wherein the metal plate is black. 2. The infrared roasting / drying machine according to claim 1, wherein each of the infrared heaters is provided with a reflector having a semicircular cross section. 3. The infrared roast dryer according to claim 1, wherein the metal plate is made of iron, cast iron, iron alloy, aluminum, aluminum alloy, copper or copper alloy. 4. The roasted and dried product supply means is composed of a hopper, and a roller or a brush is provided above the metal plate at a predetermined distance from the discharge port thereof to uniformly send the processed product. Infrared roasting drier according to any one of 3 to 3.