JPH0417349B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a drying device, and particularly to a drying device that can be used for industrial drying of vegetables, shiitake mushrooms, croutons, seafood, and various other foods. Regarding.

[Conventional technology]

Conventionally, the drying equipment used to dry the materials to be dried as described above has been either hot-air drying, in which hot air is sent into a drying chamber loaded with the materials to be dried, and the material is dried by the heat of the hot air, or infrared lamps are used. Infrared drying is generally used, which uses an infrared irradiation device and dries with infrared rays emitted by the infrared irradiation device.

[Problem that the invention seeks to solve]

However, the drying equipment using hot air described above has the disadvantage that it dries only the surface of the material to be dried, and it is difficult to heat the inside of the material.At the same time, the drying conditions tend to differ between the hot air blowing side and the outlet side. Therefore, an operating means is required to periodically reverse the direction of the air to ensure uniform heating, and there is also a drawback that the room is filled with water vapor evaporated from the material to be dried, resulting in poor drying efficiency. Furthermore, there is a problem in that soot and smoke from a heating source (usually a gas burner) of an air blower that generates hot air adheres to the object to be dried and contaminates the object to be dried.

In addition, even when using an infrared irradiation device,
After all, water vapor generated by heating the material to be dried accumulates in the drying chamber, reducing drying efficiency, and in order to evenly heat the material, the irradiation direction and light intensity of the infrared lamp must be delicately adjusted. However, there are problems such as the need for highly skilled techniques and high-performance irradiation equipment in order to obtain good drying results.

[Means to try to solve problems]

In order to eliminate the drawbacks of the above-mentioned prior art, the present invention provides a drying chamber in which the material to be dried can be taken in and taken out freely and is surrounded by a ceramic material. A flue chamber formed along the outer circumferential surface, an outside air passage, and a humid air exhaust tract chamber are sequentially arranged in a layered manner, and a heat source chamber equipped with a heat source is communicated with the lower part of the flue chamber. The ceiling of the drying chamber is provided with an outside air inlet for introducing the outside air in the outside air passageway into the drying chamber, and the lower part of the drying chamber is provided with a humid air exhaust port that communicates with the humid air exhaust passage chamber. As a result, water vapor generated by heating the object to be heated does not accumulate in the drying chamber, and the object to be dried can be dried uniformly from the inside, improving drying efficiency and requiring special equipment or The present invention provides a drying device that does not require advanced operating techniques.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows the interior of an embodiment of the drying apparatus according to the present invention cut away, and Fig. 2 shows a longitudinal section. A flue chamber 2, an outside air passage 3, and a humid air exhaust duct chamber 4 are sequentially arranged in layers around this drying chamber 1.

The drying chamber 1 has at least a side wall surrounded by a ceramic material 5 (ceramic board), one side of which is open, and can be opened and closed by a door 7 with a window 6.

The flue chamber 2 is provided along the outer peripheral surface of the drying chamber 1 from the bottom to the sides and the top, and a heat passage 9 leading to the heat source chamber 8 is connected to the center of the bottom, and a flue 10 is connected to the center of the top. are installed in succession.

The outside air passage 3 is provided along the outer peripheral surface of the flue chamber 2 from the bottom to the sides and the top, and an outside air introduction passage 11 is communicated with one side of the bottom. A blower device 13 for introducing outside air is connected thereto.

The upper part of the outside air passage 3 is a dead end, and communicates with the interior of the drying chamber 1 through an outside air inlet 14 formed in the ceiling of the drying chamber 1.

The humid air exhaust duct chamber 4 is provided along the outer peripheral surface of the outside air passage 3, and the humid air exhaust duct chamber 4 is connected to the humid air exhaust port 1 formed at the lower part of the side wall of the drying chamber 1.
5, 15... Further, the upper part of the humid air exhaust duct chamber 4 is communicated with the atmosphere through a humid air exhaust duct 16 provided around the flue 10.

A heat source 17 such as a gas burner is placed in the heat source chamber 8, and this heat source increases the temperature in the drying chamber 1 from 120° to
The temperature can be maintained at around 130℃.

[Function] Open the opening/closing door 7 to put the material to be dried into the drying chamber 1, and close the opening/closing door 7 to turn on the heat source 17 and the blower device 1.
Activate 3. The heat from the heat source 17 is transferred to the heat path 9
It enters the flue chamber 2 through the flue, and while being exhausted from the flue 10, the ceramic material 5 constituting the side wall as well as the bottom of the drying chamber 1 is heated from the outside.
By heating, far infrared rays radiated from the ceramic material 5 are irradiated onto the object to be dried, the object to be dried is warmed from inside and moisture evaporation becomes active, and the evaporated moisture floats inside the drying chamber 1.

On the other hand, outside air is supplied to the outside air passage 3 by the blower 13, and this outside air is heated by the heat in the adjacent flue chamber 2 while passing through the outside air passage 13 and reaching its upper part. All the air flows into the drying chamber 1 from the upper part through the outside air inlet 14.

The outside air that has entered the drying chamber 1 has only one exit, the humid air exhaust ports 15, 15... at the bottom of the side wall of the drying chamber 1. The air rises through the air exhaust duct chamber 4 and is discharged into the atmosphere from the humid air exhaust duct 16.
During this time, the outside air contains a large amount of relatively high specific gravity water vapor floating inside the drying chamber 1 and carries it away, so no water vapor accumulates inside the drying chamber 1, and the drying chamber 1 is kept in a dry state at all times. I can do it.

The drying status of the material to be dried in the drying chamber 1 can be checked using the opening/closing door 7.
observation through the window 6, and when the drying is completed, the heat source 17
Then, the blower 13 is stopped, the opening/closing door 7 is opened, and the dried material is taken out.

The shape and structure of each chamber in the above embodiments is not limited to that shown in the drawings, and can be appropriately selected depending on the shape and size of the object to be dried.

〔Effect of the invention〕

As explained above, the drying device according to the present invention is provided with a drying chamber in which the material to be dried can be taken in and taken out freely, and the periphery is surrounded by ceramic material, and the outer periphery of the ceramic material of the drying chamber is A flue chamber formed along the surface, an outside air passage, and a humid air exhaust tract chamber are sequentially arranged in layers, and a heat source chamber equipped with a heat source is communicated with the lower part of the flue chamber, and the drying The ceiling of the chamber is provided with an outside air inlet for introducing the outside air in the outside air passageway into the drying chamber, and the lower part of the drying chamber is provided with a humid air exhaust port that communicates with the humid air exhaust path chamber. Therefore, the water vapor that evaporates from the object to be dried when it is heated by far infrared rays from the ceramic material in the drying chamber absorbs moisture until the outside air that is introduced from the ceiling of the drying chamber is exhausted from the bottom of the drying chamber. This ensures that no water vapor accumulates in the drying chamber. In particular, since outside air enters the drying chamber from the top and is exhausted from the bottom, no convection of the outside air occurs within the drying chamber, which allows water vapor to be discharged more effectively and significantly increases drying efficiency. In addition, the material to be dried in the drying chamber is heated by heating the ceramic material from its outer surface.
Far-infrared rays generated by heating the ceramic material are irradiated to evenly heat the object from within, so unlike when blowing hot air directly, there is no local heating or uneven heating, and the material is heated and dried evenly. Moreover, there is no burning of the material to be dried or contamination due to adhesion of gas soot, etc. Furthermore, unlike those that use infrared lamps, there is no need for operations such as adjusting the light intensity of the lamp, or operations such as periodically reversing the air blowing direction as in hot air drying, and the work does not require skill. There are various effects.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof. 1... Drying room, 2... Flue room, 3... Outside air passage, 4... Humid air exhaust duct room, 5... Ceramic material, 7
... Opening/closing door, 8... Heat source room, 10... Flue, 13
...Blower device, 14...Outside air inlet, 15...Humid air exhaust port, 16...Humid air exhaust path, 17...
...Heat source.

Claims (1)

[Claims] 1. A drying chamber is provided in which the material to be dried can be freely taken in and taken out and is surrounded by ceramic material, and a flue chamber is formed along the outer circumferential surface of the ceramic material in the drying chamber at the outer periphery. , an outside air passage and a humid air exhaust duct chamber are arranged in a layered manner, a heat source chamber equipped with a heat source is communicated with the lower part of the flue chamber, and the ceiling of the drying chamber is provided with an air passage inside the outside air passage. A drying device characterized in that an outside air inlet for introducing outside air into the drying chamber is provided, and a humid air exhaust port communicating with the humid air exhaust path chamber is provided at the lower part of the drying chamber.