JP2012057863A - Wood drier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood drier which efficiently accommodates and dries a large amount of wood in a short period of time by efficiently applying hot air to the wood.SOLUTION: In the wood drier, a drying chamber 9 is configured to include: a box-shaped processing chamber 5 having a door 19 which freely opens and closes on a front face and a communication vent port formed on an upper face to allow the hot air N to flow in and out, and further wood accommodating space 21 which accommodates wood A stacked inside and a hot air circulating path 23 for circulating the hot air N; and a dome-shaped hot air blowing chamber 7 which is provided above the processing chamber 5 so as to cover an upper face of the processing chamber 5 and has a blast fan 25 and a heater 27 inside.

Description

  The present invention relates to a wood dryer that accommodates long wood such as building squares and plates in a drying chamber and dries hot air, and more particularly to a wood dryer that is excellent in wood accommodation efficiency and drying efficiency.

As a conventional wood dryer, there are one provided with a square box-shaped drying chamber as shown in Patent Document 1 below and one provided with a cylindrical drying chamber. A wood dryer provided with a square box-shaped drying chamber has an advantage that wood can be efficiently accommodated, but has a disadvantage that it is difficult to produce a flow of hot air, and the drying efficiency is poor and drying takes time.
On the other hand, a wood dryer equipped with a cylindrical drying chamber has the advantages of being structurally strong in pressure, smooth in the flow of hot air and excellent in drying efficiency, but has poor wood accommodation efficiency and can be processed by one drying. Has the disadvantage of reducing the amount of.

  Moreover, in the following Patent Document 1, a ventilation passage is provided in the drying chamber in addition to the wood storage space, or the ventilation passage is formed in a constricted shape to improve the drying efficiency of the wood and shorten the drying time. To be able to.

Japanese Utility Model Publication No. 53-184

However, in the case of the wood dryer disclosed in Patent Document 1, since the shape of the hot air blowing chamber in which the blower and the heater are arranged is a square box shape, the generated hot air is transferred from the hot air blowing chamber to the wood. When the process chamber is accommodated, the airflow is disturbed, and the hot air efficiency is reduced accordingly.
Moreover, in the said patent document 1, since the capacity | capacitance of the ventilation path is made comparatively large, the accommodation efficiency of wood is worse by that much. In addition, since the wood is dried only with hot air, there is a problem that the drying time becomes long.

  The present invention has been made based on such points, and the object of the present invention is to efficiently store a large amount of wood, and to efficiently apply hot air to the wood to dry the wood to a predetermined moisture content in a short time. An object of the present invention is to provide a wood dryer that is excellent in pressure resistance, heat resistance and corrosion resistance and can be easily installed and assembled.

  In order to achieve the above object, a wood dryer according to claim 1 of the present invention is provided with a door that can be opened and closed on the front surface, a communication vent that allows hot air to flow in and out on the upper surface, and wood stacked in the interior. A square box-shaped processing chamber in which a wood storage space for storing the hot air and a hot air circulation path through which hot air circulates are formed, and a blower fan is provided inside the processing chamber so as to cover the upper surface of the processing chamber. And a dome-shaped hot air blowing chamber in which a heater is disposed.

  Further, the wood dryer according to claim 2 is the wood dryer according to claim 1, wherein a vacuum pump connected to the processing chamber by a decompression pipe line is provided on the side of the drying chamber, The wood housed in the processing chamber is configured to be hot-air dried under a reduced pressure atmosphere.

  The wood dryer according to claim 3 is the wood dryer according to claim 1 or 2, wherein a spray pipe is disposed at an upper portion of the processing chamber, and the side of the drying chamber faces the spray tube. A steam generating boiler that supplies steam via a steam supply pipe is provided, and dampers are provided on the left and right upper wall surfaces across the center in the width direction of the hot air blowing chamber, and the wind direction of the blowing fan Accordingly, one of the left and right dampers functions as an intake port for taking in external air, and the other functions as an exhaust port for discharging heated air containing moisture in the drying chamber to the outside, and is accommodated in the processing chamber. The wood is characterized in that the humidity is adjusted by the steam sprayed from the spray pipe and the air supply / exhaust by the damper.

  The wood dryer according to claim 4 is the wood dryer according to any one of claims 1 to 3, wherein the blower fan blows hot air so that the main wind direction is staggered in the center in the width direction of the hot air blower chamber. A plurality of chambers are arranged at appropriate intervals in the length direction of the chamber.

  Further, the wood dryer according to claim 5 is the wood dryer according to any one of claims 1 to 4, wherein the heater is an erotic fin heater, and the left and right side wall surfaces in the width direction of the hot air blowing chamber and the hot air blowing chamber. It is attached using the beam material provided in the lower part of the hot air blower chamber, and a plurality of U-shaped erotic fin heaters used when changing the extension direction. It is used and is arranged to be folded back and forth in the hot air blowing chamber.

  Moreover, the wood dryer according to claim 6 is the wood dryer according to any one of claims 1 to 5, wherein the wall surface of the drying chamber is formed of a structural frame material such as a channel material, and the bone A predetermined comprising: a corrosion-resistant steel plate attached to the inner wall surface side of the aggregate; a structural steel plate attached to the outer wall surface side of the aggregate; and a heat insulating material disposed using a gap between the aggregates. A plurality of panel members having a size are connected by using fasteners such as bolts.

  The following actions can be obtained by the above means. First, by making the processing chamber for storing stacked timbers into a square box shape, the efficiency of storing timber is improved and a large amount of timber can be processed by one drying.

Further, since the dome-shaped hot air blowing chamber is provided above the processing chamber, the flow of hot air between the hot air blowing chamber and the processing chamber becomes smooth, the drying efficiency of the wood is improved, and the drying time is shortened.
In addition, the improvement in pressure resistance of the drying chamber enables hot air drying in a reduced pressure atmosphere, and the drying time of wood can be shortened.

  In addition, when a vacuum pump connected to the processing chamber is provided on the side of the drying chamber so that the wood is dried with hot air under a reduced pressure atmosphere, the drying efficiency of the wood is further improved and further drying time is increased. Is shortened.

  In addition, a spray pipe is arranged in the upper part of the processing chamber, and a steam generating boiler for supplying steam to the spray pipe through a steam supply pipe is provided on the side of the drying chamber. Dampers are provided on the upper left and right wall surfaces across the center in the width direction of the hot air blowing chamber, and one of the left and right dampers functions as an inlet for taking in external air depending on the wind direction of the blowing fan, and the other is the drying chamber When it is configured to function as an exhaust port that discharges heated air containing moisture to the outside, the wood in the processing chamber is not only dried by hot air from the hot air drying chamber, but also steam that is sprayed from the spray tube Steamed by. After that, it is dried by heating while maintaining an appropriate humidity by a damper for adjusting humidity, and it is prevented that the temperature in the drying chamber becomes excessively high or the humidity is excessively increased.

  Further, when the blower fan is arranged in the center in the width direction of the hot air blowing chamber, and a plurality of units are arranged at appropriate intervals in the length direction of the hot air blowing chamber so that the main wind direction of the blower fan is alternated. The air volume of the hot air circulating in the drying chamber becomes uniform in the length direction of the drying chamber, so that the wood can be dried uniformly.

  In addition, when the heater is constituted by an erotic fin heater and arranged to extend in the length direction of the hot air blowing chamber on the left and right in the width direction of the hot air blowing chamber, the air blown by the blower fan is efficiently heated. It is possible to achieve excellent heat dissipation effect and heat exchange efficiency. Further, by connecting a plurality of straight type erotic fin heaters and U-shaped pipes or U-shaped erotic fin heaters, it becomes possible to cope with drying chambers of various sizes and lengths.

  In addition, the wall of the drying chamber is a corrosion-resistant steel plate on the inner wall surface side of the aggregate, a structural steel plate on the outer wall surface side, and a plurality of panel materials of a predetermined size in which a heat insulating material is disposed in the gap between the aggregates, such as bolts In the case where it is configured by connecting using the fasteners, the pressure resistance, heat resistance and corrosion resistance of the drying chamber can be improved, and the drying chamber can be easily installed and assembled in various sizes, It becomes possible to correspond to the drying chamber of length.

  According to the wood dryer of the present invention, a large amount of wood can be efficiently stored, so that the efficiency of drying treatment of wood is improved. Moreover, since the hot air generated by the blower fan and the heater can be efficiently applied to the wood, the wood can be dried to a predetermined moisture amount without difficulty in a short time. Also, by improving the pressure resistance of the drying chamber, it is possible to dry hot air in a reduced pressure atmosphere, shortening the drying time of the wood, improving the quality without any color fading, twisting, warping or cracking of the wood after drying Can be planned. In addition, the use of the panel material improves the heat resistance and corrosion resistance of the drying chamber, making it easier to install and assemble the drying chamber.

It is a figure which shows the 1st Embodiment of this invention and is a front view which shows a wood dryer. It is a figure which shows the 1st Embodiment of this invention and is a side view which shows a wood dryer. It is a figure which shows the 1st Embodiment of this invention, and is AA sectional drawing in FIG. 2 which shows a wood dryer. It is a figure which shows the 1st Embodiment of this invention and is a BB expanded sectional view in FIG. 2 which shows a wood dryer. It is a figure which shows the 1st Embodiment of this invention and is a sectional side view of the panel material of a wood dryer. It is a figure which shows the 2nd Embodiment of this invention, and is a cross-sectional view which shows a wood dryer.

Hereinafter, a mode for carrying out the present invention will be described taking the first embodiment shown in FIGS. 1 to 5 and the second embodiment shown in FIG. 6 as examples.
(1) 1st Embodiment (refer FIGS. 1-5)
The wood dryer 1 according to the first embodiment is provided above the processing chamber 5 so as to cover the processing chamber 5 that houses the wood A stacked on the carriage 3 and the upper surface of the processing chamber 5. And a machine room 13 provided adjacent to the rear plate 11 as an example of the drying room 9.

The size of the drying chamber 9 is, for example, a width W of 2800 mm, a height H of 5300 mm, and a depth D of 10750 mm. The width W1 of the front opening 15 of the drying chamber 9 is 1500 mm as an example, and the front opening 15 The height H1 is 3500 mm as an example.
Further, as the wood A that can be accommodated in the drying chamber 9, building squares, plates, etc. can be applied. As an example, if the wood A is a 135 mm square and a length of 3000 mm, a 90 mm phosphorous wood is placed on a carriage 3 having a height of 200 mm. And a 25mm sun tree, a stack of 60 pieces of wood A, 10 horizontal and 6 vertical, is stacked in three stages, and a total of 180 pieces of wood A are stacked. Since the cart 3 can be accommodated in the drying chamber 9, a total of 540 pieces of wood A can be processed by one drying.

The processing chamber 5 is assembled using a panel material 17 described later in a rectangular box-shaped room as shown in the figure. The front opening 10 is formed in the front plate 10 of the processing chamber 5, and a door 19 that can be opened and closed is attached to the front opening 15 to close the front opening 15.
Further, on the upper surface of the processing chamber 5, a communication vent (not shown) for flowing hot air N generated in a hot air blowing chamber 7 described later into the processing chamber 5 and flowing out from the processing chamber 5 to the hot air blowing chamber 7. Is provided.

Further, as described above, a wood accommodating space 21 for accommodating the wood A stacked on the carriage 3 as described above is formed in the processing chamber 5, and the hot air blowing chamber 7 is provided around the wood accommodating space 21. A hot air circulation path 23 that circulates the inflowing hot air N in the processing chamber 5 and returns it to the hot air blowing chamber 7 is formed.
The hot air blowing chamber 7 is configured as a dome-shaped chamber having a bowl shape provided above the processing chamber 5 so as to cover the upper surface of the processing chamber 5. And in the said hot air ventilation chamber 7, the ventilation fan 25 which sends a wind in the process chamber 5, and the heater 27 which heats the said wind and makes the hot air N are provided.

The blower fan 25 is provided at the center in the width direction X of the hot air blower chamber 7. In the present embodiment, four air blowing fans 25 are provided as an example, and the four air blowing fans 25 are arranged in the hot air blowing chamber so that the main wind direction C for sending wind at the time of forward rotation is staggered. 7 in the longitudinal direction Y with an appropriate interval.
In the present embodiment, a fan with six blades having a diameter of 800 mm is used as the blower fan 25 and has a blown amount of about 440 m per minute at 50 Hz during normal rotation.

The blower fan 25 is driven by a motor 29 capable of forward and reverse rotation, and can send wind in the sub wind direction opposite to the main wind direction C not only during forward rotation but also during reverse rotation. Yes.
However, since the air volume in the sub wind direction is smaller than that in the main wind direction C, the four air blowing fans 25 are arranged so that the main wind directions C are staggered as described above, as described above. Thereby, the air volume of the hot air N sent from the hot air blowing chamber 7 to the processing chamber 5 is made uniform.

In addition, the heater 27 is configured by an erotic fin heater as an example, and left and right side wall surfaces 31 and 33 in the width direction X of the hot air blowing chamber 7 and beam members provided at the lower portion of the hot air blowing chamber 7. 35 is attached to the outside in a slightly inclined posture using an H-shaped steel and a U bolt as an example. A steam S is supplied to the erotic fin heater from a steam generating boiler 45 provided in a machine room 13 to be described later, and thereby the wind of the hot air blower 7 is heated. Has been.
The erotic fine heater includes a straight-type erotic fin heater extending in the longitudinal direction Y of the hot air blowing chamber 7 and a U-shaped pipe or a U-shaped erotic fin heater used when changing the extension direction. A plurality of them are used so as to be folded back and forth in the hot air blowing chamber 7. As an example of the erotic fin heater, one having a width of about 19 mm, a pitch of about 4.2 mm, and a heat dissipation amount of about 1800 W per meter is used. The drying chamber 9 is heated by hot air N heated by the heater 27. The inside of is heated to about 120 ° C.

In addition, between the beam member 35 and the side plates 37 and 39 of the processing chamber 5, for example, four reinforcing aggregates that act in a bracing manner to increase the strength of the drying chamber 9 at four locations on the front, rear, left and right sides. (Angle member) 41 is attached using a bracket provided appropriately.
Further, two spray tubes 43, 43 are provided on the upper portion of the processing chamber 5 in the vicinity of the left and right reinforcing aggregates 41, 41 as an example extending along the length direction Y of the processing chamber 5. Steam S is supplied to the spray pipes 43 and 43 from a steam generating boiler 45 provided in the machine room 13 to be described later, and is provided to the spray pipes 43 and 43. The steam S is jetted from the nozzle ports 47, 47 formed toward the side of the hot air circulation path 23 on the side.

  Further, dampers 51 and 53 for humidity adjustment are provided on the left and right upper wall surfaces 49 sandwiching the center in the width direction X of the hot air blowing chamber 7. The left and right dampers 51, 53 function as an intake port through which one of the dampers 51 to 53 takes in the external air G depending on the wind direction of the blower fan 25, and the other is heated air K containing moisture W in the drying chamber 9. It is comprised so that it may function as an exhaust port which discharges outside.

Next, the structure of the panel material 17 which comprises the wall surface of the drying chamber 9 is demonstrated based on FIG. This panel material 17 is composed of an aggregate 55 formed by arranging structural frame materials such as channel materials in a grid in the vertical and horizontal directions, and stainless steel having a thickness of 2 to 5 mm as an example attached to the inner wall surface side of the aggregate 55. Heat insulation provided by using a corrosion-resistant steel plate 57 made of a steel plate, a structural steel plate 59 made of a galvalume steel plate as an example attached to the outer wall surface side of the aggregate 55, and a gap 61 between the aggregates 55. And a material 63.
In addition, felt, rock wool, glass wool or the like can be used as the heat insulating material 63, and the dimensions of the panel material 17 are formed in a predetermined standard size (for example, a width of about 2000 mm and a height of about 3500 mm). ing.

Further, the floor surface of the drying chamber 9 is constituted by a floor panel 65 of a predetermined size that has been standardized in the same manner as the panel material 17. On the upper surface of the floor panel 65, the wheel 4 of the carriage 3 is disposed. Two rails 67, 67 are laid along the length direction Y of the drying chamber 9 in accordance with the gauge width.
The rails 67 and 67 are made of stainless steel flat bars as an example. The panel members 17, the floor panels 65, and the connection between the panel members 17 and the floor panel 65 are performed using fasteners such as bolts (not shown), and the drying chamber 9 is installed, assembled, and disassembled. And is configured to be easily performed.

The machine room 13 includes a steam generation facility 69 for supplying the steam S toward the heater 27 and the spray pipe 43, and a part of a decompression facility 71 for making the inside of the drying chamber 9 a decompressed atmosphere. A control panel 73 that controls the steam generation equipment 69 and the decompression equipment 71 and the above-described blower fan 25, heater 27, spray pipe 43, and the like by means of devices and a program set in advance according to the state of the wood A. Is provided.
Among these, the steam generating equipment 69 includes the above-described steam generating boiler 45, a recovery tank 75 for storing the water W supplied to the boiler 45 and the recovered water W, and the recovery tank 75 by softening tap water. The water softener 77 is supplied to the heater 27, and the steam supply pipe 79 for guiding the steam S generated by the boiler 45 to the heater 27 and the spray pipe 43 is provided as an example.

  The decompression equipment 71 includes a vacuum pump 81 for making the inside of the drying chamber 9 a decompressed atmosphere in the machine room 13, and a heat exchanger 83 for cooling the heated air K containing moisture W in the drying chamber 9. And a decompression conduit 85 for connecting the processing chamber 5 and the vacuum pump 81, and a recovery tank for recovering and circulating the water W obtained by the heat exchange outside the mechanical chamber 13. 87, a cooling tower 89 that cools the recovered water W, and a water storage tank 91 that stores the cooled water W are configured as an example.

Next, an operation procedure when the wood A is dried using the wood dryer 1 configured as described above will be described. First, for example, three pieces of wood A are appropriately stacked on a carriage 3 using phosphorus wood or sun wood.
The stacked wood A is put together with the carriage into the processing chamber 5 from the front opening 15 where the door 19 is opened, and is sequentially pushed along the rails 67 and 67 using a forklift or the like.

After all the wood A is stored in the processing chamber 5, the door 19 is closed, and the control panel 73 in the machine chamber 13 is operated so that the blower fan 25, the heater 27, the boiler 45, the vacuum pump 81, and the like are operated under predetermined working conditions. Operate.
In the present embodiment, by using the vacuum pump 81, the atmospheric pressure in the drying chamber 9 is reduced to about 0.8 atm (about 81.06 KPa) as an example, and about 0.2 atm (about 20.265 KPa). The hot air drying of the wood A is performed under the reduced pressure atmosphere.

  First, the steam S supplied from the boiler 45 of the machine room 13 reaches the spray pipe 43 through the steam supply pipe 79, and is injected from the nozzle port 47 of the spray pipe 43 toward the hot air circulation path 23 on the side. The And the timber A accommodated in the timber accommodation space 21 is heated and steamed by the steam S sprayed from the spray pipe 43. Next, the wind generated by the blower fan 25 is heated by the heater 27 and is converted into hot air N from the hot air blowing chamber 7 into the processing chamber 5 to raise the temperature in the processing chamber 5 to about 120 ° C. .

On the other hand, the hot air N supplied into the processing chamber 5 reaches the lower space of the carriage 3 through the hot air circulation path 23 formed in the side space of the wood housing space 21, and is opposed to the wood housing space 21. It returns to the hot air blowing chamber 7 from the side space on the side and circulates again.
In addition, during the circulation, a part of the hot air N acts directly on the stacked wood A from the space provided with the phosphorus wood and the sun wood to promote the drying of the wood A.

Further, the direction of the flow of the hot air N is changed by switching the rotation direction of the motor 29 between the normal rotation direction and the reverse rotation direction at a predetermined timing, so that the hot air N flowing in the drying chamber 9 is partially It acts on the timber A uniformly over the length direction Y of the drying chamber 9 without being biased.
The temperature in the drying chamber 9 is adjusted by controlling the temperature of the heater 27. The humidity in the drying chamber 9 is adjusted by dampers 51 and 53 provided on the upper wall surface 49 of the hot air blowing chamber 7, and the damper 51, 53 is configured to function by appropriately switching between the intake port and the exhaust port. The control is performed based on the wet bulb temperature by a dry and wet bulb thermometer provided in the drying chamber 9. And such a hot-air drying process is implemented over 3 days or more as an example, and the wood of 60%-120% moisture content is dried as an example to the moisture content of about 18%, and is completed.

Further, the heated air K in the processing chamber 5 is sucked to the outside by the vacuum pump 81, is heat-exchanged by the heat exchanger 83 and cooled, and then reaches the vacuum pump 81. Accordingly, since the vacuum pump 81 has a higher capability when the temperature of the air taken in is lower, a desired pressure reduction effect is exhibited.
Further, the moisture W in the heated air K generated during the heat exchange by the heat exchanger 83 is discharged as a drain. Further, the cooling water is taken out of the machine room 13, cooled through the recovery tank 87, the cooling tower 89, and the water storage tank 91 and used for circulation.

And by making the structure of the hot air blowing chamber 7 into a dome shape, the flow of the circulating hot air N becomes smooth and circulates efficiently, and the drying time is greatly shortened. Appearance defects such as discoloration, twisting and cracking of the wood after drying do not occur.
Moreover, according to the said wood dryer 1, since the wood A can be accommodated efficiently and in large quantities, the drying process efficiency of the wood A improves. Further, since the hot air N generated by the blower fan 25 and the heater 27 can be efficiently applied to the wood A, the wood A can be dried to a predetermined moisture amount without difficulty.
In addition, since the structure of the hot air blowing chamber 7 is a dome shape, the pressure resistance of the drying chamber 9 is improved, hot air drying in a reduced pressure atmosphere is possible, and the drying time of wood can be shortened.
In addition, the use of the panel material 17 having the above structure improves the heat resistance and corrosion resistance of the drying chamber 9 and facilitates the installation and assembly of the drying chamber 9.

(2) Second embodiment (see FIG. 6)
A wood dryer 1A according to the second embodiment basically has the same configuration as the wood dryer 1 according to the first embodiment. Therefore, here, the description will focus on the configuration unique to the second embodiment, which is different from the first embodiment.
Specifically, the wood dryer 1A according to the second embodiment includes a plurality of current plates 93 that are inclined obliquely inwardly with respect to the hot air circulation path 23 on the side of the wood housing space 21. The hot air N supplied from the hot air blowing chamber 7 is made to act on the wood A more efficiently.

  The wood dryer 1A according to the second embodiment can also improve the accommodation efficiency and drying efficiency of the wood A similar to the wood dryer 1 according to the first embodiment. The drying time can be further shortened by the flow of the hot air N formed by the plate 93.

In addition, the wood dryer 1 of this invention is not limited to the thing of said embodiment, The design change is possible within the summary of the invention. For example, the size of the wood dryer 1 is not limited to the size described in the description of the above embodiment, but may be various sizes corresponding to the length, size, and amount of the wood A to be accommodated. Is possible. In this case, if the length of the drying chamber 9 corresponds to the length in the length direction Y, the volume of the drying chamber 9 can be easily changed only by changing the number of panel members 17 to be connected.
The structure of the blower fan 25 is not limited to the structure described in the description of the above embodiment, and the design can be changed according to the blowing conditions. The heater 27 is not limited to the erotic fin heater, but an electric heater or the like. May be used.
Further, the number of the blower fans 25 and heaters 27 can be increased or decreased in accordance with the size of the drying chamber 9, and the arrangement and number of the spray tubes 43 and the dampers 51 and 53 can be variously changed.

  The wood dryer of the present invention can be used in the production and use fields of wood dryers used when drying long wood such as squares and plates in a short time, and in particular, the efficiency of housing and drying efficiency of wood It has applicability when it is desired to improve.

DESCRIPTION OF SYMBOLS 1 Wood dryer 3 Bogie 4 Wheel 5 Processing chamber 7 Hot air ventilation chamber 9 Drying chamber 10 Front panel 11 Rear panel 13 Machine room 15 Front opening 17 Panel material 19 Door 21 Wood accommodation space 23 Hot air circulation path 25 Blower fan 27 Heater 29 Motor 31 Side wall surface 33 Side wall surface 35 Beam material 37 Side plate 39 Side surface plate 41 Reinforcement aggregate 43 Spray pipe 45 Boiler 47 Nozzle port 49 Upper wall surface 51 Damper 53 Damper 55 Aggregate 57 Corrosion-resistant steel plate 59 Structural steel plate 61 Gap 63 Heat insulation Material 65 Floor panel 67 Rail 69 Steam generation facility 71 Decompression facility 73 Control panel 75 Recovery tank 77 Soft water device 79 Steam supply conduit 81 Vacuum pump 83 Heat exchanger 85 Decompression conduit 87 Recovery tank 89 Cooling tower 91 Water storage tank 93 Rectifier plate 95 Reinforcement frame 97 Guide slope A Wood W Width H Height D Depth W1 Width H Height N hot X width direction C main wind direction Y longitudinal direction S vapor G outside air W water (moisture)
K heated air

Claims (6)

  A door that can be opened and closed on the front, a communication vent that allows inflow and outflow of hot air on the upper surface, and a wood storage space for storing the stacked wood inside and a hot air circulation path through which hot air circulates A square box shaped processing chamber, and a dome-shaped hot air blowing chamber provided above the processing chamber so as to cover the upper surface of the processing chamber and having a blower fan and a heater disposed therein. A wood dryer characterized by comprising a drying chamber.   A vacuum pump connected to the processing chamber by a decompression pipe line is provided on the side of the drying chamber, and the wood housed in the processing chamber is configured to be hot-air dried under a reduced pressure atmosphere. The wood dryer according to claim 1, wherein the wood dryer is provided.   A spray pipe is disposed in the upper part of the processing chamber, and a steam generating boiler for supplying steam to the spray pipe through a steam supply pipe is provided on the side of the drying chamber. Dampers are provided on the left and right upper wall surfaces across the center in the width direction of the blower chamber, and one of the left and right dampers functions as an air intake for taking in external air according to the wind direction of the blower fan, and the other is moisture in the drying chamber. The wood which is configured to function as an exhaust port for discharging heated air containing air to the outside, and the humidity of the wood housed in the processing chamber is adjusted by the steam sprayed from the spray pipe and the supply / exhaust by the damper The wood dryer according to claim 1, wherein the wood dryer is configured as described above.   The blower fan is provided with a plurality of fan fans arranged at appropriate intervals in the length direction of the hot air blowing chamber so that the main wind direction is alternated in the center in the width direction of the hot air blowing chamber. The wood dryer according to any one of 1 to 3.   The heater is an erotic fin heater, which is attached using beam materials provided on the left and right side wall surfaces in the width direction of the hot air blowing chamber and the lower portion of the hot air blowing chamber, and is a straight type that extends in the length direction of the hot air blowing chamber A plurality of U-shaped pipes or a plurality of U-shaped erotic fin heaters used when changing the extension direction with the erotic fin heaters are arranged so as to be folded back and forth in the hot air blowing chamber. The wood dryer according to any one of claims 1 to 4.   The wall surface of the drying chamber is an aggregate formed by a structural frame material such as a channel material, a corrosion-resistant steel plate attached to the inner wall surface side of the aggregate, and a structural steel plate attached to the outer wall surface side of the aggregate A plurality of panel members of a predetermined size provided with a heat insulating material disposed using a gap between the aggregates, using fasteners such as bolts. The wood dryer according to any one of claims 1 to 5.

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