JPS63105663A - Low-temperature drying apparatus - Google Patents

Abstract

PURPOSE:To enable the shortening of working time without lowering the quality of the material to be dried, by raising the temperature of the material from its core by far infrared heating without using air as a heating medium and drying the material at a low temperature. CONSTITUTION:Plural transfer conveyors 2a-2e are arranged in a drying chamber 1 in multiple stages. Plural far infrared radiators 3 are disposed corresponding to the transfer paths of the transfer conveyors. The drying chamber 1 contains blowers 14, 15 to circulate air in the chamber, coolers 17a-17e and heaters 18a, 18b. A material to be dried, e.g. dough of rice cracker, fish, shellfish, meat, etc., is heated from its core by the far infrared heating without using air as a heating medium and is dried at a low temperature. Accordingly, the working time can be shortened without lowering the quality of the material and the dried material produced by this apparatus has improved preservability.

Description

[Detailed description of the invention] Peel and fruit on the skin! The present invention relates to a low-temperature drying device for drying rice crackers, rice cracker dough, seafood, and meat.

BACKGROUND OF THE INVENTION Hitherto, it has been known to dry rice crackers, gravy dough, seafood, and meat using high-temperature drying using hot air and low-temperature drying, which maintains the drying room temperature at about 40°C.

The problem that Ming is trying to solve is that conventional high-temperature drying has the advantage of short drying time, but on the other hand, it only dries the surface and cannot evenly dry the inside of the object. In addition to poor quality and storage stability, there were disadvantages such as deformation of the dried material and the smell of gas or oil, which is the heat source.

On the other hand, conventional low-temperature drying eliminates the disadvantages of high-temperature drying, but has the drawbacks of long working time and extremely poor working efficiency.

An object of the present invention is to provide a drying apparatus that has the advantages of low-temperature drying while eliminating its disadvantages.

A hand-drying room to solve the problem, a multi-stage transfer conveyor placed inside the drying room, a plurality of far-infrared generators installed corresponding to the transfer path of this transfer conveyor, and It consists of a blower for circulating air, a cooler placed inside the drying chamber, and a heater also placed inside the drying chamber.

False--1- Since it is possible to heat the material to be dried using far infrared rays without using air as a medium, it is possible to raise the temperature of the material to be dried from the core without raising the temperature inside the drying chamber. , the drying time can be shortened without interfering with low-temperature drying.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Five stages of transfer conveyors 2a, 2b, 2c, and 2d are installed in the drying chamber 1, which can form a closed space, and the first stage transfer conveyor 2a is connected to a rotation drive system (not shown). The Wt ring moves in the upper counterclockwise direction, the second stage transfer conveyor 2b circulates clockwise in the figure, the third stage transfer conveyor 2c circulates in the same direction as the transfer conveyor 2a, and so on. They are configured to circulate in opposite directions relative to the conveyor of the next stage.

Each of the transfer conhairs 2a, 2b, 2C, 2d.

A plurality of far-infrared heaters 3 as far-infrared generators are provided corresponding to the transfer routes 2e, and each transfer conveyor 2a
, 2b, 2c, 2d, and 2e, the material to be dried (not shown) being transported is irradiated with far infrared rays to raise the temperature of the material from its core. The material to be dried is sent from the top transfer conveyor 2a to the next transfer conveyor 2b, and is sequentially sent to the next step to reach the bottom transfer conveyor 2e, from where it is transferred to each of the transfer conveyors 2a, 2b, 2c, 2d.

2e falls onto the lower conveyor 4 whose transport direction is perpendicular. The objects to be dried that have fallen onto the lower conveyor 4 are transferred to the ascending conveyor 5 provided in parallel with the transfer conveyors 2a, 2b, 2c, 2d, and 2e, and are moved upwardly. Each transfer conveyor 2a, 2b, 2
c, 2d, and 2e are dropped onto the upper conveyor 6 whose transfer direction is perpendicular, and then transferred onto the transfer conveyor 2a again.

A leveling FILO supported by a rotating shaft 9 rotated by a motor 8 via bevel gears 7a and 7b is provided on the transfer path of the transfer conveyor 2a near the upper conveyor 6, and this leveling plate 1o As the drying material rotates, the material to be dried is placed on the transfer conveyor 2a in a leveled state.

In addition, 11 is a guide plate, and from each transfer conveyor 2a, 2b, 2c, 2d, the next transfer conveyor 2b,
It guides the falling of the material to be dried onto 2c, 2d, and 2e.

A partition plate I2 is provided along the lower part of the transfer conveyor 2e, and a flow port 13 is opened at the right end of the partition plate I2 in FIG. A lower blower 1@a14 is installed near the flow port 13 on the lower side of the partition plate 12, and an upper blower 15 is suspended from the top plate of the drying chamber 1.
The air in the drying chamber 1 is circulated and flowed counterclockwise in the drawing by each of the air blasts 4ful 4°15.

A compartment 16 is provided on the left side of the drying chamber 1 in the figure, and within this compartment 16 are provided four stages of coolers 17a, 17b, 17c, and 17d each having a dehumidifying function. Further, a cooler 17e having a dehumidifying function is also provided on the lower surface of the temporary partition 12. And the partition plate 1
2, heaters 18a and 18b are installed.

Since this embodiment is configured as described above, the air inside the drying chamber 1 is blown from the top by 8! I5 and the lower blower 14, and on the flow path, each cooler 17a, 17b, 17c, 17d,
In addition to being cooled and dehumidified by the heaters 18a and 17e,
8b and becomes dry air at approximately 40°C. This dry air is supplied to each transfer conveyor 2a, 2b, 2c.
, 2d, 2e, come into contact with the material to be dried that is circulated and transported by both the upper and lower conveyors 6.4 and the ascending conveyor 5, and gradually dry it. Further, while the drying material is being moved by each transfer conveyor 2a, 2b, 2c, 2d, 2e,
The far-infrared cotton heater 3 raises the temperature of the product from the core. At this time, since the heating by the far-infrared heater 3 does not use air as a medium, the temperature of the drying air in the drying chamber 1 does not rise, and low-temperature drying is not inhibited. Therefore, the material to be dried is efficiently dried at a low temperature due to the synergistic effect of the drying air and the heating by the far-infrared heater 3.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the heaters +8a and 18b may utilize the heating action of a condenser, the far-infrared generator may be a panel-shaped one, etc. Needless to say, many modifications were made within the scope of the technical philosophy.

Effects As is clear from the above explanation, according to the present invention, the material to be dried is heated by far infrared rays without using air as a medium to raise the temperature of the material from the core, and low-temperature drying is performed. This makes it possible to shorten the working time, does not impair the quality of the dried material, and also improves its shelf life.

[Brief explanation of the drawing]

The figure is a schematic side sectional view showing a preferred embodiment of the invention. ■...Drying room 2a, 2b, 2c, 2d. 2e... Transfer conveyor 3... Far infrared heater 14... Lower blower 15... Upper blower 17a, 17b, 17c. 17d, 17e-cooler 18a, 18b...heater

Claims (1)

[Claims] A drying chamber, a multi-stage transfer conveyor disposed within the drying chamber, a plurality of far-infrared generators provided corresponding to the transfer path of the transfer conveyor, and a blower for circulating air within the drying chamber; A low-temperature drying device characterized by comprising a cooler placed in a drying chamber and a heater also placed in the drying chamber.