JP4355303B2 - Low temperature drying equipment - Google Patents

Description

The present invention relates to low-temperature drying equipment.

  Generally, among drying apparatuses for drying wood and the like, there is a low-temperature drying apparatus for drying wood at a low temperature of 35 to 60 ° C. so as to prevent cracking and distortion of the wood. As an example of such a low-temperature drying device, the low-temperature drying device includes a drying chamber provided with an open / close door so that the wood loaded on the carriage can be stored, and the temperature of the drying chamber is raised inside the drying chamber. A heater, a dehumidifier that discharges moisture to the outside, a blower that circulates the heated and dehumidified air in the drying chamber, and a rectifying plate that controls the wind in a desired direction are provided.

  When drying wood, the wood loaded on the carriage is brought in, the door is closed, the drying chamber is heated to 35-60 ° C. by a heater, an air flow is introduced into the drying chamber by a blower, and a dehumidifier is used. The moisture in the drying chamber is discharged and the wood is gradually dried.

Here, as prior art documents related to the low temperature drying apparatus, there are the following Patent Documents 1 and 2.
JP-A-9-318251 Japanese Patent Laid-Open No. 7-4847

  However, since such a low-temperature drying apparatus takes time to dry, it has been required to shorten the drying time. Moreover, since it is necessary to provide means and structures, such as a dehumidifier which discharge | releases a water | moisture content, there existed a problem that a running cost and installation cost started.

The present invention is intended to provide a low-temperature drying equipment to reduce costs with view of the above circumstances, shortening the drying time.

The present invention is a low-temperature drying apparatus comprising a drying chamber capable of carrying an object to be dried , and an outer chamber in which the drying chamber is disposed ,
The drying chamber has a heating means for heating the drying chamber dryable temperature at low temperatures, the air blowing means for blowing hot air into the drying chamber, and a panel body constituting the sides of the drying chamber Rutotomoni, wherein The outer room is equipped with a dehumidifier that dehumidifies the humidity inside the outer room so as to adjust the environment outside the drying room,
The panel body is configured by laminating cardboard materials without gaps between the inner side surface and the outer side surface, while configuring the inner side surface and the outer side surface with a solid wood plate surface,
When drying the object to be dried, the dehumidifier of the outer chamber is dehumidified so that no water droplets are generated outside the drying chamber, so that the plate surface of the wood constituting the panel body of the drying chamber is adjusted to the wood. The moisture in the drying chamber is released to the outside due to the wetness, and the cardboard member constituting the panel body in the drying chamber absorbs and transmits moisture generated between the inner side surface and the outer side surface. The present invention relates to a low-temperature drying device configured to be able to recover from drying .

  The present invention preferably includes an adjustment duct adjacent to the side panel body so that the hot air blown into the drying chamber can be controlled.

  In the present invention, the drying chamber preferably includes an inlet for taking in outside air at the upper part of the side surface, and an outlet for discharging moist and heavy air at the lower part of the side part.

  The present invention preferably includes a ceramic body so as to generate far-infrared rays by hot air heated by the heating means, and the heating means, the air blowing means, and the ceramic body are preferably disposed on the top of the object to be dried.

  In the present invention, it is preferable that a plurality of heating means and air blowing means are provided and switched.

According to the low-temperature drying equipment of the present invention, it is possible to reduce the cost by shortening the drying time. In addition, since moisture is discharged using the humidity controllability of the wood of the panel body and the absorbability, transmission, release, and recovery of the cardboard material, the drying time of the object to be dried can be shortened. Furthermore, when the outer chamber is equipped with a dehumidifier that dehumidifies the humidity in the outer chamber so as to adjust the environment outside the drying chamber, water droplets are generated on the outer surface of the drying chamber, or due to external high humidity, Since it is possible to prevent a state in which moisture cannot be released to the outside, it is possible to achieve an excellent effect that the drying object can be suitably dried and the drying time of the drying object can be further shortened .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 12 show an embodiment of the present invention.

  A low-temperature drying apparatus 1 according to an embodiment of the present invention includes a drying chamber 5 provided with an open / close door 4 so that a drying object 3 such as wood loaded on a carriage 2 can be stored. A ceiling back space 7 is formed through the partition upper surface 6, and an adjustment duct 8 is formed on one side of the drying chamber 5 along the carry-in / out direction of the carriage 2.

  In the ceiling space 7, a plurality of duct portions 11 (see FIG. 5) extending in the width direction of the drying chamber 5 so as to form a suction port 9 leading to the drying chamber 5 and an outlet 10 leading to the adjustment duct 8. 2 and four in FIG. 3, and heating means 12 such as a heater and heating means are respectively disposed inside the plurality of duct portions 11 so as to be positioned above the drying object 3 such as wood. 12 is disposed in the vicinity of the heating means 12, the air blowing means 13 such as a blower installed in the duct portion 11 on the upstream side, the ceramic body 14 disposed in the duct portion 11 on the downstream side of the heating means 12, and the heating means 12. When the heating means 12 and the air blowing means 13 are driven, the air in the drying chamber 5 is sucked into the duct portion 11 from the suction port 9 by the air blowing means 13 and heated. The air flow is heated by means 12 to produce hot air containing infrared rays. Causes a far infrared against infrared hot air to the ceramic body 14, and to discharge from the outlet 10 of the duct section 11 to adjust the duct 8.

  Here, the heating means 12 such as a heater is not particularly limited as long as it raises the temperature of the drying object 3 such as wood to a temperature at which it can be dried at a low temperature and generates infrared rays. A sheathed heater formed in an M shape is preferable so as to increase the height. Further, the air blowing means 13 such as a blower is preferably arranged close to the heating means 12 so as to eliminate the abnormal heating of the heating means 12 and does not suck wood chips or the like into the suction port 9 of the air blowing means 13. It is preferable to provide a suction prevention net. Further, the shape and composition of the ceramic body 14 are not particularly limited as long as far infrared rays are generated by infrared rays from the heating means 12. In the figure, reference numeral 13a denotes a motor of the blowing means 13.

  The adjustment duct 8 includes a wood partitioning side (plate surface) 16 extending adjacent to the side surface of the drying chamber 5, a column 17 having a vertical groove so as to support the partitioning side 16 on both sides, and a partitioning side 16. Are provided with a plurality of wire mesh surfaces 18 sandwiched at predetermined positions (in FIG. 1, three positions of an upper position, a central position, and a lower position), and hot air blows into the adjustment duct 8 from the duct portion 11. When blown from the outlet 10, the hot air is guided downward by the arrangement of the partitioning side surface 16 and the wire mesh surface 18, and the hot air is dispersed by the wire mesh surface 18, and the hot air is controlled and blown into the drying chamber 5. The partition side surface 16 and the wire mesh surface 18 are assembled by sliding into the groove of the support column 17 from the viewpoint of changing the arrangement of the partition side surface 16 and the wire mesh surface 18, ease of installation, and reducing the installation cost (Kendon method). ) Is preferred.

  The floor surface 19 of the drying chamber 5 is laid on a concrete base 20 with a wood plate surface 21 to block strong alkali components, chemical components, and cold radiation from the concrete. As shown in FIG. 10, guide rails 22 that guide the wheels 2 a of the carriage 2 are arranged from the opening / closing door 4 toward the back of the drying chamber 5. The guide rail 22 is partially cut before the door 4 so that the heat in the drying chamber 5 does not leak outside through the guide rail 22.

  The side surfaces on both sides of the drying chamber 5 are constituted by a panel body 23 using a wood plate surface, and the panel body 23 is a wood plate surface and an inner side surface (one plate surface) 24 as shown in FIG. And the outer side surface (the other plate surface) 25, and a plurality of cardboard materials 26 are laminated between the inner side surface 24 and the outer side surface 25 without gaps, and moisture adheres to the outer surface of the inner side surface 24. As shown in FIG. 5, moisture generated between the inner side surface 24 and the outer side surface 25 is absorbed and transmitted from the inner side surface 24 to the dry outer side surface 25 via the corrugated cardboard material 26, and dried. The water in the chamber 5 can be discharged to the outside as water vapor. Here, the corrugated cardboard material 26 is composed of a corrugated core 26a, and a liner 26b bonded to both surfaces of the core 26a so as to hold the core 26a, and a plurality of layers are laminated. Thus, moisture is absorbed, transmitted, discharged to the outside, and recovered when the inside of the drying chamber 5 is dried, and at the same time, heat insulation is enhanced. Further, the cardboard material 26 is subjected to a flame-retardant treatment by applying an inorganic incombustible agent, and is resistant to a temperature rise such as hot air, and also has an insect-proof and ant-proof effect.

  Here, the panel body 23 is not limited to the side surface of the low-temperature drying apparatus 1, and may be used for other surfaces such as a ceiling surface. good. Further, the plate surface of the wood of the panel body 23 is preferably solid wood having humidity control, and at the same time, the wood on the partition upper surface 6 of the drying chamber 5 and the wood on the floor surface 19 are also solid so as to reduce the influence from the outside. Wood is preferred.

  Further, when assembling the panel body 23 as described above, as shown in FIG. 6, a plurality of corrugated cardboard materials 26 are laminated on a wood unit body 27 having a peripheral surface 27a and a support surface 27b without gaps. As shown in FIG. 8, unit bodies 27 containing a plurality of corrugated cardboard materials 26 are arranged so as to be stacked along the inner side surface 24 of the wood plate surface, and the outer protrusions 24a of the inner side surface 24 and the unit body 27 are arranged. The protrusion 27c of the support surface 27b is fixed by a fastening means (not shown) such as a nail, the cardboard material 26 is sealed by the support surface 27b of the unit body 27 and the inner side surface 24 of the side surface, and the unit body 27 is supported. The panel body 23 is configured with the surface 27 b as the outer surface 25 of the panel body 23. Here, the panel body 23 is preferably assembled in advance at a factory or the like and transported to an installation place, but may be assembled at the installation place.

  As shown in FIGS. 2 and 3, the side surface of the drying chamber 5 on the counter-adjusting duct 8 side is provided with illumination means 28 in the front and back, and a room temperature sensor 29 is installed in the center. The temperature in the drying chamber 5 is controlled by sending data to An inlet 30 having an air supply fan 30 a is provided at a position adjacent to the suction port 9 of the duct portion 11, and an outlet 31 having a predetermined diameter is provided at a position below the illumination means 28 and the inlet 30. In addition, an over-rise prevention temperature regulator 32 connected to the over-rise prevention sensor 15 is arranged outside the side surface to set the over-rise temperature. When the temperature rises abnormally, data is sent to the control panel. The power supply 41 is forcibly cut off, and double safety management is performed by controlling the temperature in the drying chamber 5 and preventing overheating.

  The side surface forming the ceiling back space 7 of the drying chamber 5 includes an outer surface 25 and an inner surface 24 so as to continue from the side surface of the drying chamber 5, and the corrugated cardboard material 26 is interposed between the outer surface 25 and the inner surface 24 without a gap. The top surface forming the ceiling back space 7 of the drying chamber 5 is configured by a single wood plate surface 34. Here, an inspection port (not shown) of the device may be formed on the top surface composed of a single plate surface 34 of wood. Further, the top surface may be a panel body in which a plurality of cardboard materials are laminated without gaps between two plate surfaces instead of the single plate surface 34.

  On the other hand, outside the drying chamber 5, an outer heat insulation wall 35 surrounding the drying chamber 5 is provided so as to adjust the external environment of the drying chamber 5. The outer chamber 35 is an open / close door of the drying chamber 5. An opening / closing part 36 such as a shutter and a fan 37 for ventilation are provided on the front surface facing the side 4, and a plurality of air supply ports (in FIG. 3) are provided on the side surface and the back surface located on the back side of the drying chamber 5. Three) 38 is arranged. Further, a plurality of dehumidifiers (two in FIG. 3) 39 are arranged between the side surface of the drying chamber 5 and the side surface of the outer chamber 35, respectively, so that the temperature difference between the humidity removal and the outside air can be improved. Yes. Here, in the figure, reference numeral 40 denotes a box portion that houses an opening / closing portion 36 such as a shutter.

  The operation of the embodiment for carrying out the present invention will be described below.

  When drying the drying object 3 such as wood, as shown in FIG. 9, the drying object 3 such as wood loaded on the carriage 2 is carried in, the opening / closing part 36 of the outer chamber 35 is lowered, and the drying chamber 5 The door 4 is closed, the heating means 12 and the air blowing means 13 are driven to raise the temperature in the drying chamber 5 to 40-50 ° C., preferably 42 ° C.-45 ° C. A duct unit is provided by the blowing means 13 so that the outside air of the drying chamber 5 (air in the outer chamber 35) is taken into the drying chamber 5 by the air supply fan 30a of the inlet 30 and is not directly applied to the drying object 3. 11, heated by the heating means 12 to be hot air, and in a state containing far infrared rays by the ceramic body 14, is discharged into the adjustment duct 8, and the hot air is discharged from the adjustment duct 8 into the partitioning side surface 16 and the wire mesh surface 18. To distribute to the drying chamber 5 and With circulating hot air in 燥室 within 5 to discharge the moist heavy air to the outside of the drying chamber 5 from the discharge port 31.

  Next, when the humidity in the drying chamber 5 decreases with time, as shown in FIG. 11, the supply fan 30a of the inlet 30 is stopped and the driving of the heating means 12 and the blowing means 13 is maintained. Then, hot air containing far-infrared rays is circulated in the drying chamber 5 through the duct portion 11 and the adjustment duct 8, and the drying object 3 such as wood is finally dried.

  At this time, the hot air circulating in the drying chamber 5 causes moisture generated from the drying object 3 such as wood or moisture present in the drying chamber 5 to adhere to the inner side surface 24, so that the humidity conditioning property of the wood and the cardboard material 26 Moisture is transmitted in the order of the inner surface 24, the cardboard material 26, and the outer surface 25 due to absorption, transmission, release, and recovery, and discharged as water vapor to the outside of the outer surface 25. Then, the hot air containing moisture is guided downward from the air outlet 10 of the duct portion 11 to increase the time for which the moisture contacts the side panel body 23, and the humidity control and absorption, transmission, and release properties of the panel body 23 are increased. -The drainage efficiency of the moisture in the drying chamber 5 is enhanced through recovery.

  Further, the outer chamber 35 appropriately absorbs moisture discharged from the drying chamber 5 by a dehumidifier, and maintains an appropriate dry state (environmental state) so that water droplets are not generated outside the side surface of the drying chamber 5. . Here, when the humidity in the drying chamber 5 is reduced from the initial drying stage, the supply fan 30a at the inlet 30 is stopped and the outside air in the drying chamber 5 (air in the outer chamber 35) is discharged. It does not flow into the drying chamber 5. Further, the switching from the first drying stage to the state in which the humidity in the drying chamber 5 is low may be performed after a predetermined time or may be determined by determining the state of the drying object 3.

Here, when the result when using the low temperature drying apparatus 1 of this embodiment is compared with the case of the other low temperature drying apparatus 1,
(1) As a result of drying a cedar board (Oguni cedar in Oguni-machi, Aso-gun, Kumamoto Prefecture) at a thickness of 15 mm, a width of 110 mm, a length of 2 m and a set temperature of 40 ° C. for one day, the water content is 62.9-78.4%. From 10.8 to 18.2%, and the same cedar board was dried at a set temperature of 50 ° C for one day. As a result, the moisture content was reduced from 60.2 to 74.8% to 8.9 to 16.0%. .
(2) Cedar board immediately after sawing (Towada cedar in Towada City, Aomori Prefecture) 10 days thick, 110 mm wide, 2.2 m long, 42 sheets (≈ 0.1 m ³ ), dried at a set temperature of 45 ° C. for one day As a result, the total weight of 65.80 kg is reduced to a total weight of 36.26 kg five days after delivery, and the same cedar board is 20 mm thick, 110 mm wide, 2.2 m long, 21 sheets (≈0.1 m ³ ). As a result of drying at a set temperature of 45 ° C. for 47 hours, the total weight of 66.58 kg was reduced to a total weight of 37.44 kg 5 days after delivery.
Here, when the average value of the reduction amount is converted to 1 m ³ , it becomes 293.4 kg, and in the example of the low-temperature drying apparatus 1 of the present embodiment, a weight difference of about 2.9 tons of water is generated by one drying. In addition, since transporting an undried material is transporting a water | moisture content with a tree, a great loss of energy is produced and the environment is also polluted.
(3) On the other hand, most of the conventional low-temperature drying apparatuses are dehumidified, and it is said that approximately 5 to 10 days are required when the drying result as described above is obtained.
From the above, it is clear that the low-temperature drying apparatus 1 of the present invention can greatly shorten the drying time. Further, the fuel consumption required for drying of 1 m ³ is about 500 yen (consumed electricity), which is very inexpensive, and the conventional fuel consumption for 1 m ³ is said to be 2000 yen to 4000 yen.

  Thus, according to the low-temperature drying apparatus 1 of the embodiment for carrying out the present invention, the moisture is discharged by using the moisture conditioning property of the wood of the panel body 23 unlike the side surfaces of metal, concrete, etc. The drying time can be shortened. Further, since moisture is discharged by using the humidity control property of the wood of the panel body 23, the moisture content of the dry object 3 can be easily stabilized and the leveling of the whole can be accelerated. Further, since the hot air is circulated around the drying object 3 in the drying chamber 5 by the heating means 12 and the air blowing means 13, the hot air is uniformly distributed to the drying object 3, and the drying object 3 is suitably dried. , Drying time can be shortened. Furthermore, it is not necessary to provide a means or structure such as a dehumidifier that discharges moisture, and moisture is discharged using the moisture conditioning property of the wood of the panel body 23. Therefore, running costs and installation costs can be reduced. In addition, since the drying process can be performed at a low temperature of 40 ° C. to 50 ° C., preferably 42 ° C. to 45 ° C., personnel for monitoring the drying process can be dispensed with. Furthermore, a person can enter and exit the working drying chamber 5.

  Moreover, since moisture of the wood of the drying object 3 is discharged using the humidity control property of the wood of the panel body 23, the wood resin is prevented from being discharged and an appropriate drying process is performed without imposing excessive load on the wood. be able to. Furthermore, since the moisture content of the wood of the panel body 23 is easily stabilized, the moisture content of the wood of the drying object 3 can be easily stabilized, so that the drying treatment can be suitably performed regardless of the wood species and thickness of the wood. In addition, in the conventional low-temperature drying apparatus 1, the tree species and thickness of wood are limited to the same thing.

  The panel body 23 forms an inner side surface (one plate surface) 24 and an outer side surface (the other plate surface) 25 with a plate surface of wood, and the cardboard material 26 is disposed between the inner side surface 24 and the outer surface 25 without a gap. When laminated and configured to discharge moisture in the drying chamber 5 to the outside without accumulating moisture between the inner side surface 24 and the outer side surface 25, the moisture conditioning property of the wood of the panel body 23 and the absorption of the cardboard material 26 Since the moisture is discharged using the property, the transmission property, the release property, and the recovery property, the drying time of the drying object 3 can be further shortened. Moreover, the temperature drop in the drying chamber 5 can be suppressed by utilizing the heat retaining property of the cardboard material 26. Here, the cardboard material 26 disposed between the inner side surface 24 and the outer side surface 25 suitably enhances absorbability, transmission, release, recovery, and heat retention when a plurality of thin cardboard materials 26 are laminated. be able to.

  When the outer chamber 35 surrounding the drying chamber 5 is provided so as to adjust the environment outside the drying chamber 5, water droplets are generated on the outer side surface 25 of the side of the drying chamber 5, or the inside of the drying chamber 5 due to external high humidity. Therefore, the drying object 3 can be suitably dried to further reduce the drying time of the drying object 3.

  When the adjustment duct 8 adjacent to the side panel body 23 is provided so that the hot air blown into the drying chamber 5 can be controlled, the hot air containing moisture is guided downward from the air outlet 10 of the duct portion 11 to provide moisture. Is sufficiently brought into contact with the side panel body 23, the moisture in the drying chamber 5 can be efficiently discharged to the outside, and the drying time of the drying object 3 can be further shortened. Further, the adjustment duct 8 is assembled by sliding the partition side surface 16 and the wire mesh surface 18 into the groove of the support column 17 (Kendon method), so that the flow of hot air can be easily changed to suitably dry the drying object 3. In addition, the installation cost can be reduced.

  When the drying chamber 5 includes an inlet 30 for taking in outside air at the upper part of the side surface and an outlet 31 for discharging moist and heavy air at the lower part of the side part, the outside air is to be dried depending on the position of the inlet 30. Since direct application to the object 3 is suppressed, the object to be dried 3 can be suitably dried without applying stress to the object to be dried 3. Further, the humid and heavy air generated during the initial drying is easily discharged to the outside of the drying chamber 5 depending on the position of the discharge port 31, so that the drying object 3 can be suitably dried and the drying time can be further shortened. it can.

  When the ceramic body 14 is provided so as to generate far infrared rays by the hot air heated by the heating means 12, and the heating means 12, the air blowing means 13, and the ceramic body 14 are arranged on the top of the drying object 3, the drying object is obtained by far infrared rays. 3 can be suitably dried. Moreover, since the hot air is easily circulated around the drying object 3 in the drying chamber 5 due to the upper position of the heating means 12 and the air blowing means 13 and the ceramic body 14, the hot air is distributed to the drying object 3 without unevenness. The drying object 3 can be suitably dried and the drying time can be further shortened.

  When a plurality of heating means 12 and air blowing means 13 are provided and can be switched, even if a part of the heating means 12 and air blowing means 13 fails, the drying process is performed without stopping the operation of the drying device, The drying object 3 can be suitably dried.

  Here, the low-temperature drying apparatus 1 may be enlarged by increasing the depth of the internal space, and the opening / closing doors 4 may be provided before and after the drying chamber 5. A large volume of the object to be dried 3 can be dried. Further, such a large-sized low-temperature drying apparatus 1 may be provided with a removable partition wall 42 at the center of the interior of the drying chamber 5 as shown in FIG. The different drying objects 3 may be separately dried by rotation in the respective drying chambers 5.

  The panel body 23 is assembled by stacking the cardboard material 26 on the wood unit body 27 without any gaps, arranging a plurality of unit bodies 27 containing the cardboard material 26 on the plate surface of the wood, If the cardboard material 26 is sealed with the board surface of wood and the panel body 23 is configured, the panel body 23 can be configured very easily. Therefore, the manufacturing cost and the transportation cost can be reduced, and the overall cost can be reduced. In addition, when the unit body 27 is removed, the cardboard material 26 and the side surface can be inspected for each unit body 27. Furthermore, the unit body 27 and the cardboard material 26 can be easily replaced.

Incidentally, the low-temperature drying equipment of the present invention is not intended to be limited to only the illustrated examples given above, the dry object that may be applied to foods other than wood, the panel body is to the number of cardboard material limits Of course, various modifications can be made without departing from the scope of the present invention.

It is a front view which shows the structure of the low temperature drying apparatus of the embodiment which implements this invention. It is a side view which shows the structure of the low temperature drying apparatus of the embodiment which implements this invention. It is a top view which shows the structure of the low temperature drying apparatus of the example which implements this invention. It is a sectional view showing the structure of a panel member. It is a conceptual diagram which shows the state which discharge | releases a water | moisture content outside by a panel body. It is a conceptual diagram showing a state of laminating a cardboard material to the unit body in the assembly process of the panel body. It is a conceptual diagram showing a state of attaching the unit body to the inner surface in the method of assembling the panel body. It is an arrow directional view of the VIII-VIII direction of FIG. It is a side view which shows the state which puts in / out a drying target object from a drying chamber. It is an enlarged front view which shows the state which takes in external air into a drying chamber from the outside, and discharges wet heavy air. It is an enlarged front view which shows the state which circulates a hot air in a drying chamber. It is a top view which shows the structure of the low temperature drying apparatus which can take in / out a drying target object from the front-back direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Low-temperature drying apparatus 3 Drying object 5 Drying chamber 8 Adjustment duct 11 Duct part 12 Heating means 13 Blower means 14 Ceramic body 23 Panel body 24 Inner side surface (one board | plate material)
25 Outside surface (the other plate)
26 Cardboard material 27 Unit body 30 Inlet 31 Outlet 35 Outer chamber

Claims (5)

A low-temperature drying apparatus comprising a drying chamber capable of carrying an object to be dried and an outer chamber in which the drying chamber is disposed ,
The drying chamber has a heating means for heating the drying chamber dryable temperature at low temperatures, the air blowing means for blowing hot air into the drying chamber, and a panel body constituting the sides of the drying chamber Rutotomoni, wherein The outer room is equipped with a dehumidifier that dehumidifies the humidity inside the outer room so as to adjust the environment outside the drying room,
The panel body is configured by laminating cardboard materials without gaps between the inner side surface and the outer side surface, while configuring the inner side surface and the outer side surface with a solid wood plate surface,
When drying the object to be dried, the dehumidifier of the outer chamber is dehumidified so that no water droplets are generated outside the drying chamber, so that the plate surface of the wood constituting the panel body of the drying chamber is adjusted to the wood. The moisture in the drying chamber is released to the outside due to the wetness, and the cardboard member constituting the panel body in the drying chamber absorbs and transmits moisture generated between the inner side surface and the outer side surface. A low-temperature drying apparatus configured to recover drying. The low-temperature drying apparatus according to claim 1, further comprising an adjustment duct adjacent to the side panel body so that hot air blown into the drying chamber can be controlled. The low-temperature drying according to claim 1 or 2, wherein the drying chamber has an inlet for taking in outside air at the upper part of the side surface and an outlet for discharging moist and heavy air at the lower part of the side part. apparatus. The ceramic body is provided so as to generate far-infrared rays by hot air heated by the heating means, and the heating means, the air blowing means, and the ceramic body are arranged above the object to be dried. Low temperature drying equipment. The low-temperature drying apparatus according to claim 1, wherein a plurality of heating means and air blowing means are provided and can be switched.

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