JPH0440153Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a far-infrared drying device suitable for use in drying wood, bedding, etc.

[Conventional technology]

Most conventional drying apparatuses are of a type in which moisture evaporated from the dried material is exhausted to the outside of the drying chamber by heating the dried material with a heater while ventilating the inside of the drying chamber.

[Problem that the invention attempts to solve]

In the above-mentioned type of drying apparatus, the humidity in the drying chamber increases rapidly after the wet material to be dried is introduced into the drying chamber and heating by the heater is started until drying. There are large fluctuations in humidity, such as a sudden drop. However, with this method, it is not possible to dry the dried material efficiently, and the dried material may be dried unevenly or damaged due to rapid drying.

In particular, when wood or the like is dried to a moisture content of several percent or less, the drying is rapid and the wood is likely to split or crack.

This idea was devised to solve the above-mentioned problems with conventional drying equipment, and at the same time utilizes the effect of far infrared rays to penetrate heat into the dried material, it also suppresses rapid fluctuations in humidity within the drying chamber. An object of the present invention is to provide a far-infrared drying device capable of efficiently drying dried products with less damage.

[Means to solve the problem]

The configuration of this invention will be explained with reference to the reference numerals in the drawings. Far-infrared heaters 5, 5, . It is made of a veneer of thoroughly dried solid cypress wood. Furthermore, a sheathing board 10 is inserted between the inner lining 8 and the outer lining 9.

[Effect]

In the drying device according to this invention, heat penetrates evenly into the inside of the dried material a due to the heat penetration effect of far infrared rays generated from the far infrared heaters 5, 5...
Evaporate the moisture in it. However, since the drying chamber 1 is substantially sealed, the vapor emitted from the drying chamber does not escape to the outside, and a sudden drop in humidity within the drying chamber is prevented.

In particular, since the lining 8 of the drying chamber 1 is made of solid wood from the Cypress family, which has excellent moisture absorption during humidification and moisture dissipation during drying, it responds sensitively to changes in humidity within the drying chamber 1. Moisture absorption and moisture release occur. For example, FIG. 4 shows the humidity change in the drying chamber 1 under the same conditions from the introduction of the dry material a to the drying by the operation of the far-infrared heaters 5, 5, . . . . In the figure, the case is shown in which plywood is used for the lining, and the dotted line shows the case in which a solid cypress veneer is used as the lining 8. It can be seen that the humidity fluctuation in the drying chamber 1 is smaller in the former than in the latter.

Furthermore, the sheathing board 10 inserted between the inner lining 8 and the outer lining 9 is difficult to allow moisture to pass through, and the inner lining 8
It is possible to prevent the moisture absorbed by the outer layer 9 from penetrating the outer layer 9 and escaping to the outside.

〔Example〕

Next, examples of this invention and its preferred embodiments will be described with reference to the drawings.

As shown in FIGS. 1 and 2, the drying room 1 has a cubic shape surrounded by a floor 2, side walls 4, and ceiling 3, and a door that can be opened and closed at a part of the front side of the side wall 4. 26 are provided. FIG. 3 shows a partially cut away side wall 4 of the drying chamber 1. The framework of the drying room 1 is composed of frames 11, 11, etc. such as columns and beams...
...and the inner lining 8 is on the inside and the outer lining 9 is on the outside.
A sheathing board 10 is inserted between the inner lining 8 and the outer lining 9. This structure is almost the same for the floor 2 and ceiling 3.

The inner lining 8 is formed of a veneer of solid wood of the Cypress family that has been sufficiently dried in advance, and in the case shown in the figure, the lining 8 is formed by horizontally stretching elongated veneers. As for the solid wood of the cypress family, the most suitable wood is cypress or cypress leaf.
The thickness of the plate should be several millimeters. As the sheathing board 10, a general one used as a foundation for mortar walls for construction can be used as is. Further, the outer covering 9 may be made of a solid wood veneer or plywood, and may also be made of an inorganic material such as straight or mortar.

In the drying chamber 1, far-infrared heaters 5, 5... are arranged on the ceiling 3, and fans 12, 12... are arranged alternately with these for stirring. side wall 4
A control panel 14 is provided on a part of the front surface of the controller, and this controls the far-infrared heaters 5, 5... and the fans 12, 12.
Controls the supply of electricity to... The far-infrared heater and the fan can be placed on the side of the drying chamber 1, and can also be placed on the floor 2 when the drying material a is placed floating above the floor.

Note that although the drying room 1 may be provided with a fan 15 for ventilation, this is not normally used and is used for air conditioning etc. before introducing the drying material a into the drying room 1. Furthermore, even when using it while driving, it is best to adjust the amount of excess moisture.

FIG. 5 shows a sequence controller mainly consisting of relays and the like installed on the control panel 14. When the AC power source is turned on, the timer 16 starts operating and the fans 12, 12, . . . start operating. At the same time, the relays 17, 17, . . . close, and power is supplied to the far infrared heaters 5, 5, . After that, when the time set by the timer 16 has elapsed, the timer 16 expires and the relays 17 and 1
7... opens, and the supply of power to the far infrared heaters 5, 5..., fans 12, 12..., etc. is stopped. In addition, instead of this timer switch 16,
A similar circuit can also be opened and closed by a manual switch 18.

The above relays 17, 17... and fans 12, 12
... are interlocked with the thermostat 13, and when a certain temperature is reached, the thermostat 13 turns off these relays 17, 17..., stops the far-infrared heaters 5, 5..., and turns off the fan. 12, 12... stops. In addition, in FIG. 5, 24 is a power lamp, and 25 is an operation indicator lamp.

[Effect of idea]

As explained above, according to this invention, by the internal penetration effect of far infrared rays into the dried material a, the dried material can not only be dried evenly, but also there is no sudden drop in humidity in the drying chamber 1, and rapid drying is prevented. This prevents damage to dried products caused by drying.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an embodiment of this invention, FIG. 2 is a longitudinal sectional front view showing the same embodiment, and FIG.
The figure is a perspective view with a part of the side wall cut away.
The figure is a graph showing an example of the humidity change in the drying chamber when drying material is placed in the drying chamber, and FIG. 5 is a wiring diagram showing an example of the sequence controller in the same embodiment. 1... Drying room, 5... Far infrared heater, 8...
Inner liner, 9...Outer liner, 10...Sheathing board.

Claims (1)

[Claims for Utility Model Registration] 1 Far-infrared heaters 5, 5... are arranged in a nearly sealed drying chamber 1, and the main lining 8 of the drying chamber 1 is made of thoroughly dried cypress wood. A far-infrared drying device characterized in that it is formed of a single plate of wood, and a sheathing board 10 is inserted between an inner lining 8 and an outer lining 9. 2. The far-infrared drying device according to claim 1, in which the lining 8 is made of a veneer of Japanese cypress. 3. The far-infrared drying device according to claim 1, in which the lining 8 is made of a veneer of Japanese cypress leaves.