JPH0149601B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a warehouse for storing wood, and more particularly to a warehouse suitable for storing wood such as cedar, which has a high moisture content. Wood with a high moisture content, such as cedar, is usually stored in warehouses without any special treatment, so mold can develop during storage, which can lead to discoloration in some cases. be. To prevent the growth of mold, you can reduce the humidity by ventilating the warehouse or force drying it, but if you suddenly reduce the humidity only on the surface of the wood, cracking will occur. Conventionally, it has been difficult to perform ventilation and drying while preventing this. In the case of steam drying, which is carried out while maintaining a suitable humidity level, there is a problem in that if the wood is used for three years, there will be a gap between the winter and summer grains of the wood. In addition, anti-mold agents have been developed, but they are not widely used because the application process is complicated and the natural flavor of the wood is lost. For this reason, in the past, while the wood was highly valued as a precious wood in the production area, it often grew mold or cracked during storage in the consumption area, deteriorating its quality and reducing its product value. . The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wood storage warehouse in which wood can be stored without causing mold or cracks. The ideal conditions for mold to grow are temperature
It is known that the temperature is 20℃ or higher and the humidity is 80% or higher. Therefore, if either the temperature or the humidity is kept below the above value, it is possible to prevent the growth of mold. In addition, cracks occur because the difference in moisture content between the wood surface and the wood core increases, resulting in a difference in shrinkage in both parts.In other words, the moisture gradient in both parts becomes sharp. This is the reason. Therefore, if water is extracted from the wood, especially from the surface areas where mold is likely to grow, in order to prevent the moisture gradient from becoming too steep, mold and cracks can be prevented. The inventor has determined that in order to avoid this sudden moisture gradient and prevent the growth of mold, the temperature in the wood storage room should be 20 to 25 degrees Celsius, and the humidity should be 70 to 80%.
By circulating a breeze of sec~0.5m/sec, the moisture content on the wood surface is rapidly lowered to 40% (this prevents mold from forming on the wood surface), and the temperature rise is suppressed. We have experimentally confirmed that it is sufficient to store the wood in a dry environment (this prevents the humidity from dropping more than necessary and prevents the wood from cracking). When wood with a moisture content of 40% to 300% was stored based on the schedule shown in Table 1 below, good results were obtained in that no mold or cracking occurred.

[Table] In order to satisfy such storage conditions, the present invention is a warehouse configured so that temperature, humidity, and air circulation speed can be adjusted. In a wood storage warehouse, a base such as a slatted stand or the like for air circulation is provided on the floor of the wood storage room on which the wood is placed, and a concave groove is formed below the base. An air diffusion groove is provided, and a plurality of air outlets opening upward are provided at predetermined intervals on the inner bottom surface of the air diffusion groove, communicating with the air outlet, and connecting to one end of the wood storage chamber. An underground flow passageway extending from one end to the other end and being closed at the other end is installed underground in the wood storage room, and an air suction port is provided in the ceiling of the wood storage room that opens downward and communicates with the duct at the top. A plurality of are installed at predetermined intervals, and a wind speed adjustment mechanism such as a damper for adjusting the air flow velocity is provided in the underground flow passage or air flow passage such as a duct, and one end of the underground flow passage is on the discharge side. The dehumidifier is connected to the duct, and the air outflow end side of the duct is connected to the suction side to generate a circulating airflow flowing from the floor side to the ceiling side of the wood storage chamber. Hereinafter, preferred embodiments of the present invention will be described in detail in the accompanying drawings.
This will be explained in detail based on the figures. A pair of air diffusion grooves 3 and 4 are provided on the floor of the wood storage room 2 of the warehouse 1 along both sides in the transverse direction.
Each air diffusion groove 3, 4 has four air outlets 5,..., respectively, and above each of these air outlets 5,..., a slat stand 6,... for placing wood is arranged. . Further, eight air suction ports 7, . . . are opened in the ceiling surface of the wood storage chamber 2 at equal intervals in the longitudinal direction at the center in the lateral direction. On the other hand, each of the air outlet ports 5, . . . communicates with underground air reservoirs 9, . . . through communication pipes 8, . There is. One end of the underground passageway 10 rises and communicates with a chamber 12 connected to the discharge side of the dehumidifier 11. A chamber 13 is also provided on the suction side of the dehumidifier 11.
are connected, and this chamber 13 communicates with each air suction port 7, . . . through a duct 14. Note that the duct 14, each chamber 12, 1
3, the underground flow passage 10, each of the underground air reservoirs 9,
. . . and each of the communication pipes 8, . . . form an air flow path. The underground flow passage 10 is equipped with a rotation speed converting fan 15, which can set the rotation speed of the fan to be variable and reduce the wind speed by setting the rotation speed appropriately. Ventilaries 16, . . . have the function of slowing down the airflow and sending it out so that it reaches the air outlet 5 at the end. Each communication pipe 8, . . . is provided with an adjustment damper 17, . . . on each underground air reservoir 9, . Also, adjustment dampers 18, . . . are provided near each air suction port 7, . . . of the duct 14, respectively. Each of the rotational speed conversion fans 15,..., each of the ventilators 1
6, . . . and the adjustment dampers 17, . . . constitute a wind speed adjustment mechanism. In addition, 19
is a heat exchanger, which maintains the temperature inside the wood storage chamber 2 at an appropriate temperature when the outside temperature rises or the temperature inside the wood storage chamber 2 rises due to heat discharged from the dehumidifier 11. It is for. In addition, 20
21 is a duct cover, 21 is a machine room, 22, . . . are partition frames for storage timbers 23, . Next, the operation of this embodiment will be explained. Air discharged from the dehumidifier 11 is sent to the chamber 12 and further introduced into the underground flow passage 10.
Then, the wind speed is reduced by the rotation speed converting fans 15, . . . and sent into the underground air reservoirs 9, . On the way from these underground air reservoirs 9,... to each air outlet 5,... through each communication pipe 8,..., the wind speed is further adjusted by each adjustment damper 17,... The wind speed when blowing out from the mouths 5, . . . is approximately 1 m/s. This air blows out into the wood storage chamber 2 through the air diffusion grooves 3 and 4, communicates with each of the slat stands 6, and connects the storage wood 2.
3, is sucked from each air suction port 7, . The wind speed when rising between the above-mentioned storage timbers 23 is about 0.15 m/s. In such air circulation, the dehumidifier 11 can control the humidity in the wood storage chamber 2 to a desired value that prevents the growth of mold, and each rotation speed conversion fan 1
Since the storage wood 23 is exposed to a slight breeze by the wind speed adjustment mechanism including 5,..., the moisture content on the surface is reduced to about 40% with a gentle moisture gradient between the surface and the core. It becomes possible to dry quickly. Also, the air is in the wood storage chamber 2.
Since the wood rises inside the wood storage chamber 2,
It is possible to ensure uniformity of humidity and temperature between the ceiling side and the floor side inside the storage wood 23,...
It is possible to store items under uniform conditions regardless of whether they are on the top or bottom. In addition, the air flowing through the wood storage chamber 2 rises from the lower end of each storage wood 23,... toward the upper end, crawling along the outer circumferential surface of the storage wood, covering the entire outer circumferential surface of the storage wood. Since the current flows across the wood, the outer circumferential surface of the wood can be dried evenly, resulting in uniform drying. Furthermore, when the temperature inside the wood storage chamber 2 rises due to an increase in outside air temperature, the temperature inside the wood storage chamber 2 can be maintained at a predetermined temperature by the heat exchanger 19. In this way, according to the invention, temperature, humidity,
By adjusting the air circulation speed, it is possible to obtain suitable drying and storage conditions for the wood so that mold and cracks do not occur in the wood, and it is possible to maintain uniform storage conditions in the wood storage room. Not only can drying be performed efficiently, but the structure is simple, making it easy and inexpensive to manufacture.Since hot air drying is not performed, there is no risk of fire, and there is extremely little discoloration or deterioration of the wood, and maintenance is easy. It has many excellent effects, such as being able to reduce labor and costs, and having no adverse effects even if air enters and exits when it is in circulation. Various embodiments of the present invention have been described above, but it goes without saying that the present invention is not limited to the embodiments described above, and many modifications may be made without departing from the spirit of the invention. Of course, it is possible to do so.

[Brief explanation of drawings]

FIG. 1 is a plan view showing the inside of a warehouse in a preferred embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of the warehouse also showing air outlets, and FIG. 3 is a vertical cross-sectional view of the warehouse similarly showing air flow passages. It is. 1... Warehouse, 2... Wood storage room, 3, 4... Air diffusion groove, 5... Air outlet, 6... Slatted stand, 7... Air suction port, 8... Communication pipe, 9... Underground air reservoir, 10... Underground flow passage, 11... Dehumidifier, 12, 13... Chamber, 14... Duct, 15... Rotation speed conversion fan, 16... Ventilation, 17, 18... Adjustment damper, 19...
Heat converter, 20... Duct cover, 21... Machine room, 22... Partition frame, 23... Storage wood, 24...
... Entrance/exit, 25... Opening/closing door.

Claims (1)

[Scope of Claims] 1. In a wood storage warehouse where wood is stored upright on the floor, the wood is placed on the floor of the wood storage room, and the air is circulated through a slatted stand or the like on which the wood is placed. A base is provided, an air diffusion groove formed in a groove shape is provided below the base, and a plurality of air outlets opening upward are provided at a predetermined interval on the inner bottom surface of the air diffusion groove. an underground flow path that communicates with the air outlet and extends from one end of the wood storage chamber to the other end, and is closed at the other end; , opening downwards,
A plurality of air suction ports whose upper portions communicate with the duct are installed at predetermined intervals, and a wind speed adjustment mechanism such as a damper for adjusting the air flow speed is provided in the air flow path such as the underground flow path or duct. One end of the underground passageway is connected to a discharge side, and an air outflow end side of the duct is connected to a suction side,
A wood storage warehouse characterized by being equipped with a dehumidifier that generates a circulating airflow flowing from the floor side to the ceiling side of the wood storage room.