JPS59131875A - Low-temperature dehumidifying drying ststem of wood - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a low-temperature dehumidifier for wood that can completely control sudden changes in drying conditions that cause wood to crack or warp, and can dry wood with a small amount of heat. This is related to the drying system.

Conventional wood drying systems include ventilated systems that heat outside air and send it into the drying room, absorb moisture from the wood, and then send it outside the drying room. The drying conditions are affected by the temperature and humidity of the outside air, making it difficult to control. The hot air is installed in the drying room and passed through an agitator such as a tacooling evaporator to collect and eliminate only the water vapor as drain.The cooled air is heated by a heater and circulated through the drying room again. There is a drying method, but this method has a problem in that the temperature of the drying chamber rises rapidly due to the heat generated by the compressor of the cooler. It is conceivable to control the humidity in the drying room by forming an intake vent and an exhaust vent in two places that communicate with the outside, and by using a fan or the like controlled by a thermostat to remove hot air and introduce outside air at the appropriate time. Considering the accuracy of existing thermostats, their operating temperature range needs to be at least 8°C, and especially as drying chambers have recently become larger due to cost considerations, it is necessary to lower the temperature inside the drying chamber by 8°C. It takes an extremely long time to
During this time, the drying conditions in the drying room suddenly change due to the continuous introduction of outside air, which has the disadvantage of causing cracks, warping, etc. of the wood.

The present invention addresses the above-mentioned drawbacks, and includes a means for forcibly circulating air in a drying chamber prepared in an airtight manner, and an intake vent and an exhaust vent that can be opened and closed, respectively, are formed on the wall surface of the drying chamber, and an exhaust vent is provided. An exhaust fan 1 is provided, and the opening Pj of the vent, the exhaust vent opening Pj, and the drive of the exhaust fan are controlled by a thermostat 7 on the interlocking side, and the thermostat 7 is connected to a timer circuit, and the intake vent is connected to the operating surface of the thermostat. In order to solve the above-mentioned drawbacks, a low temperature dehumidifying and drying system for wood is provided in which the opening of the exhaust vent and the driving of the exhaust fan are performed intermittently. To explain one embodiment based on the drawings, (1) is a drying chamber installed in an airtight manner, and the drying chamber (
As shown in FIG. 2, a dehumidifying box (8) formed in a box shape 17 is installed in close contact with the negative side wall (2) of 1).

The dehumidification box (8) is connected to the upper chamber (5) by the partition plate (4).
A cooling plate (8) with cooling pipes cut into a mesh is placed in the upper chamber
The cooling plate (8) is provided in an inclined manner so as to cross the cooling plate (8).
) Above is a heater plate (9) that covers heating wires etc. in a net shape.
has been established. In addition, the top of the upper chamber (6) is opened 17, and the air that has passed through the heater plate (0) is passed through the blower (
2) so that the air is blown up above the dehumidifying box (8).

αη is a water receptacle that is installed in an inclined manner below the cooling plate (8) and has a tubular lower end that penetrates the walls of the dehumidifying box (8) and the drying room (1) and is led to the outside. .

021 is formed to protrude from the rear shield surface of the upper chamber (6), and is connected to the drying chamber (
1) Penetrate the hole in the wall to communicate with the outside of the drying room ().
A lid body 05) whose opening and closing are controlled by a rod 04) reciprocated by a solenoid 08 is pivotally attached to the tip opening of 121.

Next, an air intake window n6i was bored in the wall of the lower chamber (6), and an exhaust vent 07) was formed protruding from the wall of the lower chamber (6), and a hole was bored in the wall of the drying chamber (1). The drying chamber (1) is communicated with the outside of the drying chamber (1). (to))
00) is an exhaust fan installed in the exhaust vent αη, and 00) is an IF filter configured to open freely according to the wind pressure when the exhaust fan is driven.

Incidentally, the openings of the intake vent (a) and the exhaust pen (17) may be connected to a duct or the like.

Further, the lower chamber (6) accommodates a compressor (goods) that sends refrigerant to the cooling pipe of the cooling plate (8). Next, the opening and closing of the lid 6B of the intake vent 0 (2) is controlled. The solenoid 08) and the exhaust fan 1) that opens and closes the exhaust vent 07) are both connected to the dehumidification box (8).
), and the operation is controlled by the same thermostat (not shown) that is operated by Monuichi (Incorporated) for the venting of the M f211. is 1 of the control panel (21)
A pair of vent timer switches (Foundation) (Foundation) are connected to a vent timer circuit (not shown) which is operated by any means, and when the thermostat (Y) is activated, the intake vent (inhibition and exhaust vent αη) is activated for a predetermined period of time. It is constructed so that it is repeatedly opened and closed intermittently every time.

Control [Panel packaging 1-iD-t7$t=1 bar): To: Tani L controller: Noni L coach In addition, 18-4' is a compressor timer switch that causes the compressor Q2IJ+ to operate intermittently, for example, the blower drive The switch, (a) is a heater plate operating switch, (a) is a compressor drive switch connected to the compressor timer switch (b)-', and (28) is connected to the vent thermoswitch (b) l. Vent fan drive switch, (2) 1 is a heater thermoswitch connected to the heater plate operation switch (Incorporated), and a heami dystat (not shown) connected to Okaha compressor drive Nutsch (Incorporated). The circuits connected to each switch are not shown, but they are connected to compressors, blowers, etc.
), and the operation of the heater plate (9) can be freely controlled.

Next, to explain the function of the low-temperature dehumidifying and drying system for wood according to the present invention, first, the wood (81) to be dried is accumulated in the drying chamber (1) in a state that allows air circulation, and then the blower aO (heater - Midinutat Switch -
When the heater plate (9) is activated and the heater plate (9) is heated, the air in the drying chamber (1) is forcedly circulated by the blower aO) as shown by the solid arrow in Figure 1, and the wood (
It passes through the accumulation part 811 and gradually removes moisture from the wood (81). Thus, when the air circulating in the drying chamber (1) reaches a predetermined temperature of 3 degrees, the heat converter is activated and the compressor is fully driven, and the cooling plate (8) is activated.
starts cooling and moves to the air intake window (γ) and the dehumidification box (8).
The water vapor in the humid air introduced into the upper chamber (5) is condensed and dehumidified.

The generated drain is then transferred to the water tray (01) and the drying room (1).
) The dehumidified and cooled air that is removed to the outside is heated as it passes through the heater plate (9), and is then heated by the blower Cl0).
The moisture is blown upward from the opening at the top of the moisture absorption box (8) and circulated again.

In this process, the cooling action of the cooling plate (8) and the heating action of the heater plate (9) work together to maintain the inside of the drying chamber (1) at a predetermined temperature. The heat generated by the compressor (201) is gradually transferred to the drying chamber (1) via the extraction factory (06), etc., and the room temperature is gradually raised.

However, if you turn on the vent switch (8) and the vent timer switch (turn) (c) connected to it in advance, the thermostat will operate when the room temperature rises to a predetermined limit. When the solenoid (181 opens the lid I'15 of the intake pent), the exhaust pen) (171 exhaust) 1-Q8) is activated, and the exhaust vent 07) is activated as shown by the dotted line arrow in Figure 1. Part of the humid hot air is removed and the negative pressure reduces the intake vent.
The same amount of cold dry outside air is introduced into the drying room (1
This prevents the occurrence of cracking or warping of the wood panel 1) due to overheating inside the compressor (1), and prevents overloading of the compressor due to hot and humid air.

On the other hand, a thermostatically activated differential? The thermostat requires a minimum width of 8°C, and if the drying chamber (1) has an extremely large capacity, it will take an extremely long time to lower the temperature by 8°C. When the vent timer circuit is activated, the exhaust fan (18) is driven and the lid Q51 is opened intermittently, and outside air is introduced gradually, so there is no need to suddenly change the drying conditions of the drying chamber (1). The temperature is lowered without causing any change in temperature, and the wood (31) is not adversely affected.

In short, since the present invention is designed as described above, it is possible to prevent heat loss in the drying chamber (1) as much as possible, dry wood with a small amount of required heat, and keep the temperature of the drying chamber (1) within a predetermined range. In addition to being able to completely control sudden changes in drying conditions even when outside air is introduced, it has great practical effects, such as being able to prevent cracking and warping of the wood and obtain high-quality dried wood. be.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, and Fig. 1 is a schematic diagram showing a low-temperature dehumidifying and drying system for wood according to the present invention, Fig. 2 is a perspective view of a dehumidifying box, and Fig. 8 is a longitudinal cross-sectional view of the same as above. The top view and FIG. 4 are front views of the control panel. (1) Drying room 0 smell vent) 674 sword vent (
(To)) Exhaust fan and above Applicant 1) Katsuya Haku 1 Figure No. 2 ε Accumulated 3

Claims (1)

[Claims] A wood drying system comprising means for forced circulation of air in an airtight drying chamber, means for cooling moisture-absorbed air to eliminate condensate, and means for rewarming the cooled air. An intake vent and an exhaust vent that can be opened and closed respectively are formed on the chamber wall surface, and an exhaust fan is installed in the exhaust vent, and the opening and closing of the intake vent and exhaust vent and the drive of the exhaust fan 1v are controlled in conjunction with a thermostat. A low-temperature dehumidifying and drying system for wood, characterized in that the thermostat (y) is connected to a timer circuit, so that when the thermostat is activated, the intake vent, the exhaust vent are opened, and the exhaust fan is driven intermittently. .