Steam flow control panel and drying device using the same

Abstract

To provide a steam stream control panel of higher moisture permeability and higher heat insulation, and a low power-consumption and low production-cost dryer using the same.SOLUTION: A steam stream control panel 1 is sheet-shaped and is constituted of a pair of moisture permeable sheets 11 and 12 and an air chamber 13 formed by a wood frame 13a for example, interposed between the moisture permeable sheets 11 and 12. Air stream generating means 2, or a fan for example, generates an air stream A such as an air curtain on one surface of the steam stream control panel 1. Gaseous water molecules permeate the moisture permeable sheets 11 and 12, and gaseous water molecules are diffused in the air chamber 13 by convection caused by Brownian movement. Water molecules liquified on one surface of each of the moisture permeable sheets 11 and 12 are transported to the other surface of each of the water permeable sheets 11 and 12 by a capillary phenomenon in the moisture permeable sheets 11 and 12.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a water vapor flow control panel and a drying device using the same, such as a drying device for drying high moisture content biomass at low temperatures (35°C to 60°C). [Background technology]

[0002] Generally, dryers for biomass with a specific shape and high water content, such as organic food waste and wood, are box-shaped. This type of box-type dryer includes vacuum-type, reduced-pressure-type, heat pump-type, and hot air-type dryers (see Non-Patent Document 1).

[0003] The vacuum method requires a vacuum pump, the reduced pressure method requires a reduced pressure fan for reducing pressure and a circulation fan for circulating, and the heat pump method requires a heat pump, so the manufacturing cost and power consumption of the drying device are high.

[0004] In contrast, the hot air method requires a heater and a blower fan, but has low manufacturing costs. However, since the hot air method is a non-circulating air method in which hot air is introduced from outside, evaporates the moisture from the object, and is then exhausted to the outside, the amount of heat used for drying is approximately 25-40% of the input heat, and the remaining heat is mainly exhausted as exhaust hot air (see Non-Patent Document 2). Therefore, power consumption is high. It is also possible to incorporate an air circulation system into the hot air method, but in this case, when operated at low temperatures, the drying speed drops significantly due to increased humidity, and power consumption also increases (see Non-Patent Document 3).

[0005] On the other hand, in a first conventional drying apparatus that does not use equipment such as a vacuum pump, a pressure-reducing fan, a circulation fan, a heat pump, or a blower fan, the drying chamber's framework, including the ceiling, walls, and floor, is made up of an inner panel, an intermediate layer, and an outer panel. A moisture-absorbing material (e.g., cardboard) impregnated with or coated with a large amount of a deliquescent moisture-absorbing agent is tightly inserted into the intermediate layer. Furthermore, natural ores that emit far-infrared rays are provided within the drying chamber (see Patent Document 1). Therefore, the intermediate layer quickly absorbs and diffuses moisture evaporating from the inner panel, and the moisture absorbed by the intermediate layer is expelled by the outer panel. This achieves both moisture permeability provided by the moisture-absorbing agent and thermal insulation provided by the panel.

[0006] In addition, moisture permeability refers to three properties: moisture absorption, which absorbs water vapor from the inside; internal diffusion, which diffuses the absorbed water vapor to the outside; and moisture desorption, which dehumidifies the diffused water vapor to the outside.

[0007] However, although the first conventional drying device described above can achieve both moisture permeability and heat insulation, the salts used as deliquescent moisture absorbents cannot be used for food safety reasons, and the manufacturing cost is high due to the triple structure in which an intermediate layer is inserted between the double walls of the inner and outer plate materials.

[0008] In a second conventional drying device that does not use equipment such as a vacuum pump, a pressure-reducing fan, a circulation fan, or a heat pump, the ceiling, walls, floor, and other structures of the drying chamber are constructed from board materials, and a heat source that generates heat and a ventilation means that sends heat from the heat source into the drying chamber are also provided (see Patent Document 2). This ensures moisture permeability that allows water vapor inside to be released to the outside.

[0009] Furthermore, the second conventional drying device described above does not use a deliquescent moisture absorbent. However, if the plate material is made thinner, high moisture permeability can be obtained, but high thermal insulation cannot be obtained. On the other hand, if the plate material is made thicker, high thermal insulation can be obtained, but high moisture permeability cannot be obtained. In other words, moisture permeability and thermal insulation are in a trade-off relationship, and it is impossible to achieve both.

[0010] Furthermore, the first and second conventional drying devices described above do not have any means to prevent the growth of mold that occurs inside or outside the drying device, which can lead to the growth of mold on the material to be dried.

[0011] The first conventional water vapor flow control panel used in the drying device described above includes a layer of carbonized particles impregnated with a solution containing an antibacterial component produced from biomass as a raw material and then dried, and first and second moisture-permeable sheets sandwiching the layer of carbonized particles, with the pore diameters of the first and second moisture-permeable sheets being smaller than the diameter of the carbonized particles in the layer of carbonized particles. This allows the carbonized particles in the layer of carbonized particles to be held without leakage by the first and second moisture-permeable sheets (see Patent Document 3).

[0012] According to the first conventional water vapor flow control panel, the carbonized particle layer sandwiched between the moisture-permeable sheets, through which water molecules move and diffuse, has high moisture permeability and high thermal insulation properties, which allows the power consumption of the drying device using this panel to be reduced.

[0013] A second conventional water vapor flow control panel is made of a solid moisture-permeable structure made of a polyester sheet (see Patent Document 4).

[0014] According to the second conventional water vapor flow control panel, the polyester sheet through which water molecules move and diffuse has high moisture permeability and high heat insulation properties, which allows the power consumption of the dryer using this panel to be reduced. [Prior art documents] [Patent documents]

[0015] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-132911 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-217628 [Patent Document 3] Patent No. 5963101 [Patent Document 4] Patent No. 6099179 [Non-patent literature]

[0016] [Non-Patent Document 1] Nakamura et al., "First Drying Technology", Nikkan Kogyo Shimbun, p.102 (2011) [Non-patent document 2] Nakamura et al., "First Drying Technology", Nikkan Kogyo Shimbun, p.130 (2011) [Non-patent document 3] Nakamura et al., "First Drying Technology", Nikkan Kogyo Shimbun, p.132 (2011) Summary of the Invention [Problem to be solved by the invention]

[0017] However, in the first conventional water vapor flow control panel described above, in order to prevent the passage of the carbonized particles in the carbonized particle layer, the vapor-permeable sheet must have small pores smaller than the diameter of the carbonized particles, for example, 0.4 nm or more and 2 μm or less, which results in the problem of increased manufacturing costs.

[0018] Furthermore, in the second conventional water vapor flow control panel described above, the solid moisture-permeable structure made of a relatively thick polyester sheet is large, so again there is a problem of increased manufacturing costs. [Means for solving the problem]

[0019] The present invention is applied The water vapor flow control panel comprises a frame having opposing first and second openings, and first and second moisture-permeable sheets that close the first and second openings of the frame, defining a single air chamber completely surrounded on all sides by the frame and the first and second moisture-permeable sheets, and containing a breathable member within the air chamber to make the air chamber sturdy.

[0020] The first and second moisture-permeable sheets may contain an antibacterial component, which prevents the growth of mold.

[0021] The drying apparatus according to the present invention comprises a main drying chamber, a heat source provided within the main drying chamber, and a chamber for placing materials to be dried within the main drying chamber, wherein at least a portion of the ceiling, walls, floor, and opening / closing door of the main drying chamber are formed by the above-mentioned water vapor flow control panel, and further comprises a blower means provided within the main drying chamber for generating an air flow along one surface of the water vapor flow control panel.

[0022] Furthermore, the drying apparatus according to the present invention comprises a main drying chamber, a reduced pressure drying chamber provided within the main drying chamber for placing the material to be dried, and a reduced pressure fan provided in the vicinity between the main drying chamber and the reduced pressure drying chamber, wherein at least a portion of the ceiling, walls, floor and opening / closing door of the main drying chamber are formed by the above-mentioned water vapor flow control panel, and the reduced pressure fan is for generating an air flow along one surface of the water vapor flow control panel.

[0023] Furthermore, the above-mentioned drying apparatus comprises a moisture-impermeable chamber that houses the main drying chamber, a condensing means that cools the air from the air outlet of the moisture-impermeable chamber to condense the evaporative components, a heating means that heats the dried air from which the evaporative components have been removed, and a blowing means that returns the air to the air inlet of the moisture-impermeable chamber. A heat pump or an adsorption refrigerator is particularly desirable as a means for realizing these functions. The drying apparatus also comprises a drain unit that accumulates the condensed evaporative components. This drying apparatus is particularly suitable for drying medicinal herbs. [Effects of the Invention]

[0024] According to the present invention, gaseous water molecules pass through each moisture-permeable sheet, and within the air chamber of the water vapor flow control panel, the gaseous water molecules are diffused by convection due to Brownian motion. Meanwhile, water molecules liquefied on one surface of each moisture-permeable sheet in the air chamber are transported to the other surface of each moisture-permeable sheet in the air chamber by capillary action. Therefore, in the presence of air flow, the air chamber has higher moisture permeability and higher thermal insulation. Furthermore, the power consumption of a drying device using this moisture vapor flow control panel can be reduced. Furthermore, because the moisture-permeable sheets can be made thinner due to the presence of the air chamber, the manufacturing cost of a drying device using this moisture vapor flow control panel can also be reduced. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a cross-sectional view showing an embodiment of a water vapor flow control panel according to the present invention. [Figure 2] 2 is a flowchart for explaining a method for manufacturing the water vapor flow control panel of FIG. 1. [Figure 3] FIG. 2 is a perspective view showing a modification of the water vapor flow control panel of FIG. [Figure 4] FIG. 2 is a schematic diagram showing a first example of a drying device using the water vapor flow control panel of FIG. 1. [Figure 5] FIG. 1 is a schematic view showing a commercially available drying device. [Figure 6] 5 shows an example of the drying device shown in FIG. 4, where (A) is an overview and (B) and (C) are diagrams showing the frame. [Figure 7] 5 and 4 (FIG. 6) showing the trays of the drying device. [Figure 8] 5 and 4 (FIG. 6). (A) shows the drying process data for the commercially available drying device, and (B) shows the drying process data for the drying device in FIG. 4 (FIG. 6). [Figure 9] FIG. 2 is a schematic diagram showing a second example of a drying device using the water vapor flow control panel of FIG. 1. [Figure 10] FIG. 10 is a block diagram showing a modification of the drying device of FIG. 4 (FIG. 9). DETAILED DESCRIPTION OF THE INVENTION

[0026] FIG. 1 is a cross-sectional view showing an embodiment of a water vapor flow control panel according to the present invention.

[0027] 1, the water vapor flow control panel 1 is composed of two sheet-like moisture-permeable sheets 11 and 12 and an air chamber 13 formed by, for example, a wooden frame 13a sandwiched between the moisture-permeable sheets 11 and 12. The air flow generating means 2 is, for example, a fan, which generates an air flow A like an air curtain on one surface of the water vapor flow control panel 1. The frame 13a can be in the shape of a frame or a lattice.

[0028] In FIG. 1, the moisture-permeable sheets 11 and 12 are made of polyester sheets. While the polyester sheet itself can maintain its solid state, the polyester sheet is preferably made of polyester plain weave or polyester knit to further maintain its solid state. The polyester sheet has pores with a diameter of approximately 0.1 to 100 μm or more. In other words, it has gaps larger than the longitudinal size (0.4 nm) of a gaseous water molecule. Therefore, water vapor V with a diameter (longitudinal size) of approximately 0.4 nm can pass through the polyester sheet. Furthermore, as the gaseous water molecules pass through the moisture-permeable sheets 11 and 12, they are diffused within the air chamber 13 by convection due to Brownian motion. Meanwhile, water molecules liquefied on one surface of each of the moisture-permeable sheets 11 and 12 in the air chamber 13 are transported to the other surface of each of the moisture-permeable sheets 11 and 12 in the air chamber 13 by capillary action of the moisture-permeable sheets 11 and 12. As a result, by appropriately selecting the thickness of the polyester sheets of the moisture-permeable sheets 11 and 12 and the frame 13a, higher moisture permeability and higher heat insulation can be achieved in the presence of air flow A. For example, the thickness t of the water vapor flow control panel 1 is t=10~30mm is.

[0029] The diameter of the pores in the polyester sheet can be preferably 0.1 to 2 μm. This allows the polyester sheet to have gaps smaller than the size of all spores (larger than 2 μm). This prevents the movement of harmful microorganisms such as mold, which are made up of hyphae and spores.

[0030] A method for manufacturing the water vapor flow control panel 1 of FIG. 1 will be described below with reference to FIG.

[0031] First, in the polyester sheet preparation step 201, a polyester plain weave is prepared as a polyester sheet.

[0032] Next, in the dispersion step 202, the polyester plain weave is dispersed in a solvent and placed in a mold. In this case, carbonized particles can also be dispersed in the solvent as a conditioning agent. Furthermore, antibacterial components produced using natural or biomass raw materials can also be dispersed. For example, the solvent can be water, fulvic acid solution and / or vinegar solution. When the solvent is fulvic acid solution and / or vinegar solution, the fulvic acid solution and / or vinegar solution components become the antibacterial component. Furthermore, antibacterial nanoparticles (trademark) manufactured by Nanocam Co., Ltd. can also be dispersed as the antibacterial component.

[0033] Next, in the drying step 203, the solvent is evaporated to dry the polyester plain weave.

[0034] Finally, in the cutting step 204, the polyester plain weave is removed from the mold and cut to the desired size. Using frame 13a (Fig. 1) and unitize it.

[0035] Since the cut polyester plain weave itself maintains its solidity, i.e., its mechanical strength, no additional means for maintaining its solidity is necessary. However, as shown in Figure 3, to further maintain the mechanical strength of the water vapor flow control panel 1, mesh-like members 14-1 and 14-2, each made of crossed iron rods with a diameter of 2.5 mm and coated with melamine, may be provided and fixed to the moisture-permeable sheets 11 and 12. Also, polyester knitting may be used instead of the polyester plain weave.

[0036] FIG. 4 is a schematic diagram showing a first example of a drying device using the water vapor flow control panel 1 of FIG.

[0037] In Figure 4, the drying device comprises a main drying chamber 3 consisting of a ceiling 31, walls 32, floor 33 and an opening / closing door (not shown), a drying chamber 4 for materials to be dried including three tiers of trays 41, 42, 43 for placing materials to be dried, a heater 5, ventilation fans 61, 62, a temperature sensor 7 for detecting the temperature T of the main drying chamber 3, and a control unit (microcomputer) 8 for controlling the heater 5 and ventilation fans 61, 62 based on the temperature T of the temperature sensor 7.

[0038] In Figure 4, the ceiling 31, walls 32, floor 33 and opening / closing door (not shown) of the main drying chamber 3 are configured by the water vapor flow control panel 1 of Figure 1. In addition, air flows caused by blower fans 61 and 62 as air flow generating means exist on the inner surfaces of the ceiling 31, walls 32, floor 33 and opening / closing door (not shown). Furthermore, since the main drying chamber 3 is insulated, there is no need to insulate the material drying chamber 4. This reduces manufacturing costs accordingly.

[0039] The operation of the drying device of FIG. 4 will now be described.

[0040] First, the materials to be dried, such as vegetables, medicinal herbs, etc., are placed on trays 41, 42, and 43 in the drying chamber 4. Next, a predetermined temperature T0, for example, 40°C, is set, and the heater 5 and blower fans 61 and 62 are activated. The control unit 8 controls the on / off operation of the heater 5 so that the temperature T of the temperature sensor 7 reaches the predetermined temperature T0. As a result, the air heated by the heater 5 passes through the trays 41, 42, and 43, as indicated by the thick arrows, to dry the materials, and then circulates downward along the ceiling 31 and walls 32. At this time, the water vapor pressure of the air that has finished drying increases, and the water vapor contained in the air is exhausted from the inside to the outside of the drying apparatus by the water vapor flow control panel 1 that constitutes the ceiling 31, walls 32, floor 33, and opening / closing door (not shown), as indicated by the thin arrows.

[0041] The interior of the water vapor flow control panel 1 in the ceiling 31, walls 32, floor 33 and opening / closing door (not shown) is a circulation type, and heat other than that required for drying does not leak out due to the insulating properties of the water vapor flow control panel 1, or even if it does leak out, the amount of heat is small and it is circulated within the circulation type drying device. On the other hand, since water vapor is exhausted by the water vapor flow control panel 1, the water vapor pressure of the circulated air is lowered and the material to be dried can be dried.

[0042] A comparative experiment was conducted between a commercially available drying device (manufactured by Tomei Tech Co., Ltd., product name: Petit Marenghi, model name: TTM-4355T) shown in Figure 5 and the drying device shown in Figure 4. Figure 6(A) shows an overall perspective view of the drying device shown in Figure 4. It can be realized by replacing the six ceiling, wall, and floor panels of the commercially available drying device shown in Figure 5 with the water vapor flow control panels 1 shown in Figure 1. Figures 6(B) and 6(C) show an example of a frame 13a for forming the air chamber 13 (not shown) in Figure 6(A), which is a wooden lattice. Here, polyester sheets 11 (12) (Masuda Co., Ltd., BK966_Bright King (Toray Field Sensor® Maruori)) were adhered to the frame 13a with a general-purpose heat-resistant spray adhesive for woodworking (Aica Kogyo Co., Ltd., RQ-NVN2). Trays 41, 42, and 43 are common to the commercially available drying device in Figure 5 and the drying device in Figure 6(A), with four 28 mm thick trays 41 (42, 43) shown in Figure 7(A) on top and two 42 mm thick trays 41 (42, 43) shown in Figure 7(B) on the bottom, for a total of six trays. The sample to be dried in Figures 7(A) and (B) is, for example, cypress board pieces 701.

[0043] The conditions for the comparative experiment using the commercially available drying device in Figure 5 and the drying device in Figure 6 are as follows: Drying temperature setting: 38°C (commercial drying device), 35°C (drying device in Figure 4 (Figure 6)) Drying time: 99 hours Cypress board piece 701 for dried sample (per piece): 4020mm (length), 119mm (width), 16mm (width) Drying device dimensions: width 535mm, depth 415mm, height 355mm

[0044] The results shown in Figure 8 (A) were obtained for the commercially available dryer, and the results shown in Figure 8 (B) were obtained for the dryer of Figure 4 (Figure 6). That is, the amount of moisture loss was 926.7 g for the commercially available dryer and 914.0 g for the dryer of Figure 4 (Figure 6). Therefore, there was almost no difference in the drying speed. On the other hand, the amount of power consumption required for drying was 4.37 kWh for the commercially available dryer and 2.29 kWh for the dryer of Figure 4 (Figure 6). Therefore, a significant effect of reducing power consumption was observed.

[0045] In the drying apparatus shown in Figure 4 (Figure 6) above, the ceiling 31, walls 32, floor 33 and opening / closing door are configured using the water vapor flow control panel 1 of Figure 1, but it is sufficient if at least a part of the ceiling 31, walls 32, floor 33 and opening / closing door is configured using the water vapor flow control panel 1 of Figure 1.

[0046] 4 (FIG. 6), the air flow may be natural convection without providing the blower fans 61 and 62. In this case, the material drying chamber 4 itself serves as the air flow generating means.

[0047] Furthermore, in the drying apparatus shown in Fig. 4 (Fig. 6) described above, the heater 5, which is a heat exchanger, usually requires high power. Therefore, instead of the heater 5, a heat pipe, such as a Conduction Tube (trademark), may be used to utilize low heat of 100°C or less from the outside.

[0048] Compared to conventional heat exchangers, heat pipes transfer heat through the vaporization and liquefaction of a medium, resulting in a high heat transfer rate and the ability to transfer heat even when the temperature difference between the heat-donating medium and the heat-absorbing medium is small. In particular, among heat pipes, the Conduction Tube™ encloses an evaporative working fluid in a vacuum-sealed chamber with a double-pipe structure consisting of an outer chamber and an inner core pipe, and heat is exchanged between the fluid flowing through the core pipe and the fluid outside the chamber through the vaporization and liquefaction of the evaporative working fluid. Therefore, when the vaporized medium liquefies inside the tube, it generates ultrasonic waves and far-infrared rays, which can transfer heat to the inside of the material to be dried, thereby increasing the drying speed and achieving uniform drying.

[0049] Furthermore, the drying apparatus shown in Figure 4 (Figure 6) can also be applied to a drying apparatus having a rotary kiln-type drying chamber for the material to be dried instead of the drying chamber 4 for the material to be dried. The rotary kiln-type drying chamber for the material to be dried has a horizontal cylindrical shape and is suitable for drying soybean pulp and other materials. In this case, at least a portion of the wall of the main drying chamber is formed by the steam flow control panel 1 shown in Figure 1.

[0050] FIG. 9 is a schematic diagram showing a second example of a drying device using the water vapor flow control panel 1 of FIG.

[0051] In Figure 9, a reduced pressure drying chamber 4' for the material to be dried is provided instead of the chamber 4 for placing the material to be dried in Figure 4, and the reduced pressure drying chamber 4' for the material to be dried is provided with a reduced pressure fan 9 and a circulation fan 10 provided near the boundary with the main drying chamber 3, a temperature sensor 7 and a pressure sensor 7' for detecting the temperature T and pressure P of the reduced pressure drying chamber 4' for the material to be dried.

[0052] The control unit 8 controls the pressure reducing fan 9 and the circulation fan 10 based on the temperature T of the temperature sensor 7 and the pressure P of the pressure sensor 7'.

[0053] 9, an air flow caused by a decompression fan 9 as an air flow generating means exists on the inner surfaces of the ceiling 31, walls 32, floor 33 and opening / closing door (not shown) of the main drying chamber 3. Moreover, since the main drying chamber 3 is insulated, the material vacuum drying chamber 4' does not need to be insulated.

[0054] In the material vacuum drying chamber 4', the air in the material vacuum drying chamber 4' is exhausted into the main drying chamber 3 by turning on and off the vacuum fan 9 and the circulation fan 10, and the pressure in the material vacuum drying chamber 4' is reduced. At this time, the temperature of the air drawn into the material vacuum drying chamber 4' from the main drying chamber 3 is increased by the heat generated by the vacuum fan 9 and the circulation fan 10. In this way, drying is performed under reduced pressure. Note that a heat exchanger or a heat pipe, especially a Conduction Tube (trademark), may be provided in the material vacuum drying chamber 4' as a heat source.

[0055] The operation of the drying device of FIG. 9 will now be described.

[0056] First, the items to be dried, such as vegetables and medicinal herbs, are placed on trays 41, 42, and 43. Next, a predetermined temperature T0 and pressure P0 are set, and the decompression fan 9 and circulation fan 10 are activated. The control unit 8 controls the on / off of the decompression fan 9 and circulation fan 10 so that the temperature T of the temperature sensor 7 reaches the predetermined temperature T0 and the pressure P of the pressure sensor 7' reaches the predetermined pressure P0. As a result, air drawn into the main drying chamber 3 passes through the trays 41, 42, and 43, as indicated by the thick arrows, to dry the items to be dried, and then circulates downward along the ceiling 31 and walls 32. At this time, the water vapor pressure of the dried air increases, and the water vapor contained in the air is exhausted from the inside to the outside of the main drying chamber 3 by the water vapor flow control panel 1, which constitutes the ceiling 31, walls 32, floor 33, and opening / closing door (not shown), as indicated by the thin arrows.

[0057] 9, the manufacturing cost can be reduced because the insulation of the material-to-be-dried reduced-pressure drying chamber 4' is no longer necessary. Also, the power consumption can be reduced because the heat exchange between intake air and exhaust air is no longer necessary.

[0058] In the drying apparatus shown in FIG. 9, if the pressure and temperature in the material-to-be-dried reduced-pressure drying chamber 4' can be controlled by the reduced-pressure fan 9 alone, the circulation fan 10 becomes unnecessary.

[0059] FIG. 10 is a block diagram showing a modification of the drying device shown in FIGS.

[0060] In Figure 10, the main drying chamber 3 of the water vapor flow control panel 1 in Figure 4 (Figure 9) is housed in a moisture-impermeable chamber. The moisture-impermeable chamber 50 may be either insulated or non-insulated and contains, for example, nanocellulose and / or nanofibers. The moisture-impermeable chamber 50 has an air outlet 50-1 and an air inlet 50-2 connected to the primary and secondary sides of a heat pump 51. The primary side of the heat pump 51 cools the air from the air outlet 50-1 of the moisture-impermeable chamber 50, condensing the evaporative components and discharging them into a drain unit 52. Meanwhile, the dried air from which the evaporative components have been discharged is heated on the secondary side of the heat pump 51 and returned to the air inlet 50-2 of the moisture-impermeable chamber 50. The temperature of the moisture-impermeable chamber 50 can be freely set, for example, to 20°C. The drying apparatus of Figure 10 is particularly effective when used to dry medicinal herbs, allowing the components of the herbs to be collected in the drain unit 52.

[0061] In the above-described embodiment, substantially the same effect can be obtained by incorporating a breathable heat insulating material such as glass wool, mesh fabric, rock wool, aerogel, cellulose nanofiber, etc. into the air chamber 13. In this case, the rigidity of the air chamber 13 is improved.

[0062] Furthermore, in the above-described embodiment, the moisture-permeable sheet is in the form of a sheet, such as a polyester sheet, but the moisture-permeable sheet of the present invention also includes wall-like members in the form of a wall.

[0063] 4, other air blowing means may be provided instead of the blower fan 62. For example, an air compressor may be used that draws air from the drying chamber 4, compresses it, and returns the compressed air to the drying chamber 4, thereby generating an air flow due to the Coanda effect. In other words, the blower fan 62 or the air compressor can be used as the air blowing means for generating an air flow.

[0064] Furthermore, the present invention can be applied to any modifications within the obvious scope of the above-described embodiments. [Industrial Applicability]

[0065] A drying device using the water vapor flow control panel according to the present invention can be used as a drying device for vegetables, medicinal herbs, etc., as well as a wood drying device, waterproofing device, etc. [Explanation of symbols]

[0066] 1: Steam flow control panel 11, 12: Breathable sheet 11a, 12a: hole 13: Air chamber 13a: Frame 14-1, 14-2: Mesh-like material 2: Air flow generating means 3: Main drying room 31: Ceiling 32: Wall 33:Floor 4: Drying room for dried materials 4': Reduced pressure drying chamber for dried material 41, 42, 43: Tray 5: Heater 61, 62: Blower fans 7: Temperature sensor 7': Pressure sensor 8: Control unit 9: Pressure reducing fan 10: Circulation fan 50: Non-moisture permeable room 50-1: Air outlet 50-2: Air inlet 51: Heat pump 52: Drain unit 701: Japanese cypress board piece

Claims

1. A main drying room; a heat source provided in the main drying chamber; a drying chamber for drying material provided in the main drying chamber for placing the material to be dried; Equipped with At least a portion of the ceiling, walls, floor, and opening / closing door of the main drying chamber is constituted by a steam flow control panel; The drying apparatus further comprises a blower means provided in the main drying chamber for generating an air flow along one surface of the water vapor flow control panel, The water vapor flow control panel comprises: a frame having first and second openings facing each other; first and second moisture-permeable sheets that close the first and second openings of the frame; and Equipped with A single air chamber is defined, the four sides of which are completely surrounded by the frame and the first and second moisture-permeable sheets, and a breathable member is contained within the air chamber to make the air chamber sturdy. drying equipment.

2. A main drying room; a heat source provided in the main drying chamber; a rotary kiln-type drying chamber for drying material provided in the main drying chamber and for placing the material to be dried; Equipped with At least a portion of the wall of the main drying chamber is formed by a steam flow control panel; The drying apparatus further comprises a blower means provided in the main drying chamber for generating an air flow along one surface of the water vapor flow control panel, The water vapor flow control panel comprises: a frame having first and second openings facing each other; first and second moisture-permeable sheets that close the first and second openings of the frame; and Equipped with A single air chamber is defined, the four sides of which are completely surrounded by the frame and the first and second moisture-permeable sheets, and a breathable member is contained within the air chamber to make the air chamber sturdy. drying equipment.

3. A main drying room; a reduced pressure drying chamber for drying material provided in the main drying chamber and for placing the material to be dried; a decompression fan provided in the vicinity between the main drying chamber and the material decompression drying chamber; Equipped with At least a portion of the ceiling, walls, floor, and opening / closing door of the main drying chamber is constituted by a steam flow control panel; The decompression fan is for generating an air flow along one surface of the water vapor flow control panel, The water vapor flow control panel comprises: a frame having first and second openings facing each other; first and second moisture-permeable sheets that close the first and second openings of the frame; and Equipped with A single air chamber is defined, the four sides of which are completely surrounded by the frame and the first and second moisture-permeable sheets, and a breathable member is contained within the air chamber to make the air chamber sturdy. drying equipment.

4. 4. The drying apparatus according to claim 3, further comprising a circulation fan provided in the vicinity between the main drying chamber and the material-to-be-dried reduced-pressure drying chamber.

5. 4. The drying apparatus according to claim 3, further comprising a heat source provided in the material-to-be-dried reduced-pressure drying chamber.

6. 6. The drying apparatus according to claim 2 or 5, wherein the heat source is a heat pipe.

7. moreover, a moisture-impermeable chamber that houses the main drying chamber; a heat pump connected to an air outlet and an air inlet of the non-moisture permeable chamber; The drying device according to claim 1 or 3, comprising:

8. 4. The drying device according to claim 1, wherein each of the first and second moisture-permeable sheets is a polyester sheet.

9. 9. The drying device according to claim 8, wherein the polyester sheet is a polyester plain weave or polyester knit.

10. 9. The drying device of claim 8, wherein the polyester sheet contains an antibacterial component.

11. 4. The drying device according to claim 1, wherein the frame is frame-shaped.

12. 4. The drying device according to claim 1, further comprising a mesh member for fixing the moisture-permeable sheet.

13. 4. The drying device according to claim 1, wherein the air-permeable member is an air-permeable heat-insulating member.

14. The drying device according to claim 13, wherein the breathable heat insulating member is glass wool, mesh fabric, rock wool, aerogel, or cellulose nanofiber.

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