JP2002168566A - Dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dryer in which the temperature of drying air can be raised to a set level in a shorter time at the time of starting operation and the humidity of air can be regulated to lower as drying operation progresses. SOLUTION: The dryer comprises a vertical drying chamber 1 with a door 11 coupled, at the upper part thereof, with an air supply duct 2 and, at the bottom part thereof, with an exhaust duct 3 through a coupling part 31, a blower 4 for supplying air to the drying chamber 1 through the air supply duct 2, a heating means 5 disposed in the way of the air supply duct 2, an exhaust stack 6 coupled with the exhaust duct 3, a drain outlet 30 provided at the lower part of the exhaust duct 3, a straightening plate 10 comprising a punching plate or a mesh disposed at the bottom part of the drying chamber 1, and a circulation tube 60 piped to return a part of air passing through the exhaust stack 6 back to the suction duct 40 of the blower 4 wherein an exhaust regulation damper 62 is disposed at a part on the downstream side of the circulation tube 60 of the exhaust stack 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a drying apparatus, and more specifically, to a method for drying objects to be processed having different sizes and types, such as plated products after washing. Open to a suitable drying device.

[0002]

2. Description of the Related Art The inventor deforms a plated product after cleaning.
For efficient drying at a relatively low temperature without causing damage, Japanese Patent Application No. Hei 9-158682 proposes a drying apparatus. The drying device includes a drying chamber in a vertical position in which an air duct is connected to an upper part and an exhaust duct is connected to a bottom part through a connection part, a blower that blows air to the drying chamber through the air duct, and a middle part of the air duct. Heating means installed in the exhaust duct connected to the exhaust duct, drain drain provided in the lower part of the exhaust duct, and a rectifying plate consisting of a perforated plate or mesh installed at the bottom of the drying chamber A door provided on the front surface of the drying chamber, and a circulation pipe arranged to return a part of the air passing through the exhaust pipe to the intake duct of the blower. The connecting portion between the drying chamber and the exhaust duct has a cross-sectional area perpendicular to the ventilation direction smaller than the cross-sectional area perpendicular to the ventilation direction of the exhaust duct.

[0003] In the above-mentioned drying apparatus, when a washed plating product stored in a perforated basket is put into a drying chamber and a heating means and a blower are operated, the plating product is dried by warm air passing through the drying chamber. Internal pressure of the drying chamber during operation (static pressure)
Is higher than the standard body pressure, so the warm air uniformly contacts and passes through the plated products in the basket, reaches the exhaust duct with a large cross-sectional area orthogonal to the ventilation direction, and the speed decreases, so the sound is muted. You. In the exhaust duct, moisture is discharged from the drain, a part of the warm air is sent to the blower side and circulated, and another part of the warm air is exhausted from the exhaust pipe.

[0004]

Although the above-described drying apparatus has achieved the above-mentioned object, it has been found that there are new problems as described below. That is, a part of the exhausted hot air is circulated to the blower side through the circulation tube, and the heat energy of the heating means is reused. Set the temperature of the air passing through the room to the set temperature (for example, 60 to 80 ° C)
It took time to reach. According to experiments, the humidity of the air passing through the drying chamber may be relatively high in the early stage of operation, and the air temperature may be raised to the set temperature within the shortest possible time, and the drying of the object to be treated may be performed. It has been found more efficient to reduce the humidity of the passing air as it progresses. Also, in the above-mentioned drying apparatus, the internal pressure of the drying chamber is higher than the standard body pressure (normal pressure) during operation, so when the door of the drying chamber is opened immediately after the operation is stopped, the internal pressure of the drying chamber is increased. The product popped out and was dangerous, and the product in the drying room often danced and deformed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a drying apparatus which can raise the temperature of air for drying to a set temperature in a shorter time and can adjust the humidity of air to be reduced as the drying of an object to be processed progresses. Is to provide. Another object of the present invention is to provide a drying apparatus in which a door is not opened when an internal pressure of a drying chamber is higher than a normal pressure by a predetermined value or more.

[0006]

A drying apparatus according to the present invention has the following configuration to solve the above-mentioned problems. In other words, the drying apparatus according to claim 1 has a vertical drying chamber 1 in which an air duct 2 is connected to an upper part and an exhaust duct 3 is connected to a bottom part through a connecting part 31, and the drying chamber 1 through the air duct 2. A blower 4 for blowing air to the drying chamber 1;
A heating means 5 installed in the middle of the air duct 2, an exhaust pipe 6 connected to the exhaust duct 3, a drainage drain 30 provided below the exhaust duct 3, a bottom of the drying chamber 1 or /
And a rectifying plate 10 made of a perforated plate or a mesh body installed above the connecting portion 31 and a door 1 installed in the front of the drying chamber 1
1, a circulation tube 60 arranged to return a part of the air passing through the exhaust tube 6 to the intake duct 40 of the blower 4,
And a damper 62 for adjusting the displacement is provided in a portion of the exhaust tube 6 downstream of the installation portion of the circulation tube 60.

In the drying apparatus according to the second aspect, in the drying apparatus according to the first aspect, the entirety is stored with the door 11 of the drying chamber 1 and the end of the exhaust pipe 6 facing outward or exposed. It is stored in the chamber 7, and a part of the storage chamber 7 is provided with an air inlet 71a.

According to a third aspect of the present invention, in the drying apparatus according to the second aspect, the door is provided with an automatic locking means, and the automatic locking means is started when the door is closed. The door 11 is locked by operating the button 81 or starting the apparatus, and is controlled so that the lock is released when the internal pressure of the drying chamber 1 falls below a predetermined value.

According to a fourth aspect of the present invention, in the drying apparatus of the third aspect, the automatic locking means 15 includes a solenoid 15a which operates to insert the lock pin 15b into the lock portion 15c of the door 11 when energized. And a release spring 15d for urging the lock pin 15b in the release direction.

[0010] The drying apparatus according to the fifth aspect is characterized in that:
4 is characterized in that the cross-sectional area orthogonal to the ventilation direction in the exhaust duct 3 is larger than the cross-sectional area in the connecting portion 31 orthogonal to the ventilation direction.

[0011] The drying apparatus according to the sixth aspect is characterized in that:
5. In any one of the drying apparatuses 5, a filter 41 is provided in the intake duct 40 of the blower 4.

[0012] The drying device according to the seventh aspect is characterized in that:
6, the heating means 5 starts the blower 4 at the same time as the start of the blower 4,
It is characterized in that it is controlled so as to start with a predetermined time delay.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a drying apparatus according to the present invention will be described below with reference to the drawings. FIG.
1 is a side sectional view of a preferred embodiment of a dryer for a plated product after cleaning a drying apparatus according to the present invention, FIG. 2 is a partially enlarged sectional view taken along arrow AA in FIG. 1, and FIG. FIG. 4 is an enlarged plan sectional view of a connection portion between an exhaust pipe and a circulation pipe, FIG. 5 is a partially cutaway front view of a door of a drying chamber, and FIG. 6 is a view showing a different mode. 2, and FIG. 7 is a block diagram of a control system of the drying apparatus of FIG.

Reference numeral 7 denotes a storage room including a metal skeleton frame 70 and an outer wall panel 71 detachably attached to the skeleton frame 70 by screws or the like. A main part of the drying device is stored in the storage room 7. It is installed in the state where it was done. The storage room 7 has 36
A caster 72 that rotates forward and backward by 0 degrees is attached, and guides 73 for inserting a fork of a forklift (not shown) are attached to two bottom surfaces. An air inlet 71a is opened in a part of the outer wall panel 71 at the bottom.

Reference numeral 1 denotes a drying chamber installed substantially vertically inside the storage chamber 7, 2 denotes an air duct connected to the upper portion of the drying chamber 1, and 3 denotes a drying chamber 1 through a cylindrical connecting portion 31. The exhaust duct 4 connected to the bottom of the blower 4 is a blower that blows air to the drying chamber 1 through the blower duct 2, 5 is a heating means including a heater installed in the middle of the blower duct 2, and 6 is an exhaust duct 3.
The exhaust pipe connected to. Reference numeral 42 (FIG. 3) denotes a blower motor, and reference numeral 40 denotes an intake duct of the blower 4. Intake duct 4
0 is divided into a portion facing rightward and a portion facing upward as viewed from the front so that a large amount of air can be taken in, and a filter 41 is installed at the tip of each intake duct 40. .

A door 11 is attached to the front of the drying chamber 1 so as to be exposed from the storage chamber 7. As shown in an enlarged manner in FIG. 2, the drying chamber 1 includes a bottom frame 12 having a rectangular outer periphery and a circular inner periphery, an upper frame 14 having substantially the same form, and a door 11.
And three peripheral wall plates 13 excluding the portion of
The bottom frame 12, the peripheral wall plate 13, and the upper frame 14 are made of heat-resistant resin. The connection part 31 of the exhaust duct 3 is connected to the bottom frame 12, and the connection part 20 of the blowing tact 2 is connected to the top frame 14. Rectifying plates 10 and 10 made of a perforated plate (perforated plate) or a mesh body are detachably attached to the bottom frame 12 and the upper portion of the connecting portion 31 of the drying chamber 1 in a state perpendicular to the ventilation direction. These current plates 10, 10
It bears the function of adjusting the static pressure in the drying chamber 1. For example, when the dried material supplied into the drying note 1 is a small object and the resistance of the fluid in the drying chamber 1 is large, , The one with the larger total hole area is used, and vice versa, the one with the smaller total hole area is used. When the blower 4 is rotated to the maximum in a no-load state where the drying chamber 1 is empty (there is no object to be dried), the static pressure received by the upper straightening plate 10 becomes 4 to 5 times the standard atmospheric pressure. Is preferable.

The exhaust duct 3 has a flat L-shape as shown in FIG. 3, and the upper part of one end of the flat L-shape is connected to the drying chamber 1 via a connecting portion 31 and the other end. The upper part of the end is connected to the lower part of the exhaust pipe 6 as shown in FIG. 1, and the drainage drain 30 is installed at the lower part of the part connected to the exhaust pipe 6. The cross-sectional area of the part b of the exhaust duct 3 which is orthogonal to the flow direction of the wind indicated by the arrow a in FIG. 2 is formed larger than the cross-sectional area of the part c of the connecting part 31, and in this embodiment, the former is the latter. It is almost tripled.

As shown in FIGS. 1 and 4, a porous ring 61 shaped like an inner gear having large teeth is attached to a lower portion in the exhaust pipe 6. Is fixed at the base end of a circulation tube 60 whose front end communicates with the intake duct 40 of the blower 4. By fixing the circulation tube 60 to the perforated ring 61, a number of radially slit-shaped holes 61a are formed between the inner edge side of the perforated ring 61 and the outer peripheral surface of the base end portion of the circulation tube 60. With such a configuration, a part of the air passing through the exhaust stack 6 is
The air is discharged from the upper end of the exhaust pipe 6 to the outside of the apparatus through the hole 61a, and another part of the air flows in the direction of the blower 4 through the circulation pipe 60 and the intake duct 40 and circulates.

As shown in FIG. 1, the upper end of the exhaust tube 6 projects above the storage chamber 7, and inside the projecting portion, a damper having a diameter slightly smaller than the inner diameter of the exhaust tube 6 is provided. 62 are attached. The damper 62 is a damper for adjusting the displacement. An operating handle (not shown) is attached to a shaft of the damper projecting to the outer peripheral portion. By operating the handle, the damper 62 is moved to the exhaust pipe 6.
The exhaust amount from the exhaust tube 6 can be steplessly adjusted within a range exceeding the minimum exhaust amount due to the gap between the damper 62 and the inner peripheral surface of the exhaust tube 6 when the posture is orthogonal to the above. I have.

As shown in FIG. 5, the door 11 projects forward from the edge frame 16 of the opening of the drying chamber.
A locking handle 17 having a lock portion 17a provided on an edge frame 16 is attached, and an automatic locking means 15 is provided. The automatic locking means 15 is
When the button is closed, a start button 81 described later
Is operated so as to lock the door 11 and release the lock when the internal pressure of the drying chamber 1 becomes equal to or less than a predetermined value (in this embodiment, normal pressure).

Automatic locking means 15 in this embodiment
When the lock pin 15b is turned on,
It is composed of a solenoid 15a that is operated so as to be inserted into 5c, and a release spring 15d that urges the lock pin 15b in the release direction. Solenoid 15, lock pin 15b
And the release spring 15d are covered by a casing 15e fixed to the edge frame 16. Lock part 15c
Is a hole formed in a plate 15f attached so as to protrude from the door 11 to the front side of the edge frame 16;
Sensor 11a consisting of a limit switch provided in 1
When the blower 4 is started in a state where the closing of the door 11 is detected, the solenoid 15a operates the lock pin 15b in the pushing direction, and the lock pin 15b is inserted into the lock portion 15c to lock. The door 11 is provided with an analog pressure gauge 11c on the outside and a digital pressure gauge 11b on the inside. The digital pressure gauge 11b is connected to the inside pressure of the drying chamber 1 as described later. When it is detected that the value becomes equal to or less than the predetermined value, the solenoid 15
The energization of the lock pin 15b is cut off by the release spring 15d so that the lock pin 15b is disengaged from the lock portion 15c.

Prior to the operation of the apparatus, a large number of washed relatively small plated products (not shown) are placed in the drying chamber 1 in a state of being housed in a basket 1a having a bottomed cylindrical shape and a large number of holes. Can be The size of the bottom of the basket 1a is adapted to fit approximately within the bottom frame 12 in this example. When the size of the bottom of the basket 1a is smaller than the diameter of the inner circumference of the bottom frame 12, the adapter plate 1b in a state of closing the outer circumference of the basket 1a and the inner circumference of the bottom frame 12 as shown in FIG. Is preferably placed on the current plate 10.

A control box 8 is installed in the upper front part of the storage room 7. In the control box 8, as shown in FIG. 7, a control unit 80, a start button 81, a heating temperature setting device 82, a blower 4 A first timer 83 for setting the operation time of the apparatus including the above, a second timer 83 for setting the heating time by the heating means 5 (less than the operation time of the apparatus), and a predetermined time for delaying the initial operation of the heating means 5 Third timer 8
5. A buzzer 86 and the like are provided. The control unit 80 monitors each of the timers 83 to 85 (however, when the third timer 85 is monitored, the second timer 84 is not monitored), the sensor 11a that detects opening and closing of the door 11, a digital pressure The monitoring output of the temperature sensor 11d installed in the upper part of the drying chamber 1 is monitored by the blower motor 42, the heating means 5, and the automatic locking means 15 (solenoid) as described below. 15a)
Is configured to be controlled.

In the case where the plating product to be treated has a shape with a small amount of adhering water (a shape having no concave portion or the like and having a relatively small water holding capacity), the heating temperature is set by the heating temperature setting device 82 (preferably 60 to 60). 85 ° C. range)
The operation time (3 to 6 minutes) of the device is
The heating time is set according to. Prior to the start of the apparatus, the damper 62 of the exhaust pipe 6 is operated so that the exhaust amount from the exhaust pipe 6 is small and the amount of air circulated through the circulation pipe 60 is large. When the plated product after washing is put into the drying chamber 1 as described above, the door 11 is closed and the start button 81 is operated, the blower 4 and the heater 5 start operating under the control of the control unit 80, and at the same time, the automatic locking means Fifteen
Operates so as to lock the door 11. If the sensor 11a does not detect the closing of the door 11 at the time of this start, the operation of the start button 81 is controlled to be invalid.

The heating means 5 is controlled so as to stop its operation when the detected output of the temperature sensor 11d reaches the set temperature during operation, and to restart when the detected output falls below the set temperature. Such control is continued until the heating time elapses. If an abnormal temperature is detected during operation due to a failure of the heating means 5, etc.
Is activated and a lamp (not shown) is controlled to be turned on. When the elapse of the set operation time of the apparatus is detected by the first timer 83, the blower motor 42 is controlled to stop the blower 4, and at the same time, the buzzer 86 operates to notify the end of the operation and another lamp (not shown) is turned on. Is controlled. After the operation is completed, if the internal pressure of the drying chamber 1 rapidly decreases and the pressure gauge 11b in the drying chamber 1 detects about the standard atmospheric pressure, the power supply to the solenoid 15a of the automatic locking means 15 is cut off and the lock is released. It is controlled to cancel. In the process of the above operation, the damper 62 is operated in accordance with the progress of the drying of the plated product, and the exhaust amount from the exhaust pipe 6 is adjusted to control the humidity of the air sent to the drying chamber 1 to be reduced. .

The plating product to be treated has a shape in which a large amount of water adheres (a shape having concave portions and the like and a relatively large water retention amount).
Is high heat (for example, 45 ° C.)
When the above is added, the portion where water has accumulated may be discolored in a stain-like manner, which may cause deterioration in quality. In such a case, the heating temperature is set by the heating temperature setting device 82, the operation time of the apparatus is set by the first timer 83, and the heating time is set by the second timer 84.
Sets the time for delaying the initial operation of the heating means 5. When the time for delaying the initial heating is set by the third timer 85, the control unit 80 sets the second time at the start of the apparatus.
Instead of monitoring the elapsed time of the timer 84, the elapsed time of the third timer 85 is monitored, and the operation of the heating means 5 is controlled to be delayed until the time set by the third timer 85 has elapsed. Simultaneously with the elapse of the delay time, the operation of a relay (not shown) starts monitoring the elapse of the time of the second timer 84 and controls the heating means 5 to start. Other controls are the same as those described above.

According to the drying apparatus of the above embodiment, the drying chamber 1 has a structure in which the warm air flows vertically downward from above, and the direction of the flow of the air toward the lower part of the drying chamber 1 and / or the upper part of the connection part 31. Rectifying plate 1 made of a perforated plate or the like so as to be orthogonal to
Since 0 is provided, the internal pressure in the drying chamber 1 is increased, and the warm air uniformly contacts and passes through the plated products placed in the basket 1a. Therefore, the object can be dried in a short time without increasing the air temperature so much,
Since the plated product does not move, such as being scattered in the drying chamber 1, it is possible to prevent the plated product from being deformed or damaged. When the air containing moisture that has passed through the drying chamber 1 enters the exhaust duct 3, the cross-sectional area orthogonal to the ventilation direction of the exhaust tact 3 is larger than the cross-sectional area of the connection portion 31 orthogonal to the ventilation direction. The wind speed decreases and the sound is muted.
Most of the water in the airflow having a large specific gravity flows along the bottom plate of the duct 3 as shown by an arrow d in FIG. 2 and is discharged from the drainage drain 30 at the terminal end in the duct 3. Most of the water is separated.

Air blow duct 2 from blower 4 facing upward
The air supplied to the upper part of the drying chamber 1 through the drying chamber 1
And the exhaust duct 3 is configured to be exhausted from the terminal end of the exhaust duct 3 through the exhaust pipe 6 standing upright, so that it can be installed in a narrower space. The warm air that has passed through the drying chamber 1 is partly taken into the blower duct 2 again from the blower 4 through the circulation tube 60 after most of the water is separated, and supplied to the drying chamber 1.
The heat energy of the heating means 5 is reused, and necessary and sufficient heat energy is supplied even if the heat capacity of the heating means 5 is small. Therefore, consumption of heat energy is smaller, and the drying process can be performed at lower cost. Also,
When the objects to be treated in the drying chamber 1 are small, they may move violently in a scattered manner due to the application of strong pressure. Objects can be prevented from scattering.

Since a damper 62 for adjusting the amount of exhaust gas is provided at a position downstream of the installation portion of the circulation tube 60 in the exhaust tube 6, the amount of exhaust from the exhaust tube 6 can be adjusted by operating the damper 62. Can be. By adjusting the displacement, the temperature of the air passing through the drying chamber 1 is raised to the set temperature in a shorter period of time in the early stage of the operation, and the humidity of the air passing through the drying chamber 1 is reduced as the drying of the processing target proceeds. And then
It has become possible to drive more efficiently.

An automatic locking means 15 is attached to the door 11. The automatic locking means 15 locks the door 11 by operating the start button 81 of the apparatus or starting the apparatus while the door 11 is closed. Since the lock is controlled to be released when the internal pressure of the drying chamber 1 becomes equal to or lower than a predetermined value, the door 11 does not open during or immediately after the operation where the internal pressure of the drying chamber 1 is high. Therefore,
It is possible to prevent the product in the drying chamber from jumping out due to the difference between the inside and outside pressures when the door 11 is opened, and to prevent the product in the drying chamber from dancing.

The heating means 5 is controlled to start at the same time as the blower 4 is started, or is controlled to start at a predetermined time later than the blower 4. By selecting one of the controls according to the condition, it is possible to appropriately and efficiently dry according to the shape of the processing target.

[0032]

According to the drying apparatus of the first aspect of the present invention, since the damper 62 for adjusting the amount of exhaust gas is installed at a portion downstream of the installation portion of the circulation tube 60 in the exhaust tube 6, the damper 62 is operated. By adjusting the amount of exhaust from the exhaust pipe 6, the operation can be performed more efficiently.

According to the drying apparatus of the second aspect of the present invention,
The whole is stored in the storage room 7 with the door 11 of the drying room and the end of the exhaust pipe 6 facing or exposed to the outside, and the air intake 71a is installed at an appropriate position in the storage room 7, so that it is more compact. And it is very easy to use when used indoors.

According to the drying apparatus of the third aspect,
The door 11 is locked by operating the start button 81 of the apparatus or starting the apparatus while the door 11 is closed, and is released when the internal pressure of the drying chamber 1 falls below a predetermined value. The automatic lock means 15 is controlled so that the door 11 does not open during the operation in which the internal pressure of the drying chamber 1 is high or immediately after the operation is completed. Therefore, it is possible to prevent the product in the drying chamber from jumping out due to the difference between the internal and external pressures when the door 11 is opened, and to prevent the product in the drying chamber from dancing.

According to the drying apparatus of the fourth aspect,
Since the automatic lock unit 15 is configured to be locked by a solenoid that operates when energized, the operation of the automatic lock unit 15 becomes more reliable.

According to the drying apparatus of the fifth aspect,
Since the ventilation cross-sectional area inside the exhaust duct 3 is larger than the ventilation cross-sectional area at the inlet portion of the exhaust duct 3, sound is reduced and gas-liquid separation is promoted at this portion.

According to the drying apparatus of the sixth aspect,
Since the filter 41 is provided in the suction section 40 of the blower 4, clean air is always supplied to the drying chamber 1.

According to the drying apparatus of the invention of claim 7,
The heating means 5 is controlled to start at the same time as the blower 4 is started, or is controlled to start at a predetermined time later than the blower 4. By selecting such control, drying can be performed appropriately and efficiently in accordance with the shape of the processing object.

[Brief description of the drawings]

FIG. 1 is a side cross-sectional view of an embodiment of a dryer for a plated product after cleaning a drying device according to the present invention.

FIG. 2 is a partially enlarged sectional view taken along an arrow AA in FIG.

FIG. 3 is a schematic plan view of the apparatus of FIG. 1 omitting a storage room.

FIG. 4 is an enlarged plan sectional view of a connection portion between an exhaust pipe and a circulation pipe in the apparatus of FIG. 1;

FIG. 5 is a partially broken front view of a door of a drying chamber in the apparatus of FIG. 1;

FIG. 6 is a partial cross-sectional view showing a state in the drying chamber when a basket accommodated in the drying chamber is small.

FIG. 7 is a block diagram of a control system of the drying device of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Drying room 1a Basket 10 Rectifier plate 11 Door 11a Sensor 11b Digital pressure gauge 11c Analog pressure gauge 11d Temperature sensor 12 Bottom frame 13 Peripheral wall plate 14 Upper frame 15 Automatic locking means 15a Solenoid 15b Lock pin 15c Lock section 15d Release spring 15e Casing 15f Plate 16 Edge frame 17 Handle 17a Lock part 2 Air blow duct 20 Connection part 3 Exhaust duct 30 Drainage drain 31 Connection part 4 Blower 40 Intake duct 41 Filter 42 Blower motor 5 Heating means 6 Exhaust cylinder 60 Circulation cylinder 61 Porous ring 61a Hole 62 Damper for adjusting displacement 7 Storage room 70 Frame frame 71 Outer wall panel 71 71a Air inlet 72 Caster 73 Guide for fork insertion 8 Control box 80 Control unit 81 Start button 82 Heating temperature setting device 83 First timer 84 Second timer 85 Third timer 86 Buzzer 86

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) F26B 21/10 F26B 21/10 Z 25/00 25/00 B 25/12 25/12 B

Claims (7)

[Claims] 1. A drying chamber 1 in a vertical position in which an air duct 2 is connected to an upper part and an exhaust duct 3 is connected to a bottom part via a connecting part 31, and air is blown into the drying chamber 1 through the air duct 2. Blower 4, heating means 5 installed in the middle of air duct 2, exhaust pipe 6 connected to exhaust duct 3, drain drain 30 provided at the lower part of exhaust duct 3
A rectifying plate 10 made of a perforated plate or a mesh body installed at the bottom of the drying chamber 1 or / and at the top of the connection portion 31; a door 11 installed at the front of the drying chamber 1; A circulation tube 60 arranged to return a part of the air passing through the air passage 6 to the intake duct 40 of the blower 4. A drying layer, wherein a damper 62 for adjusting the amount is provided. 2. The door 11 of the drying chamber 1 and the exhaust pipe 6
The whole is stored in the storage room 7 in a state where the end of the storage room faces or is exposed to the outside, and an air intake 71 a is provided in a part of the storage room 7. 1
The drying device according to item 1. 3. An automatic lock means 15 is attached to the door 11, and the automatic lock means 15 locks the door 11 by operating a start button 81 of the apparatus or starting the apparatus while the door 11 is closed, The drying device according to claim 2, wherein the lock is released when the internal pressure of the drying chamber 1 becomes equal to or less than a predetermined value. 4. The automatic locking means 15 comprises a solenoid 15a which operates to insert the lock pin 15b into the lock portion 15c on the door 11 when energized, and a release spring 15d which urges the lock pin 15b in a release direction. The drying device according to claim 3, wherein the drying device is used. 5. A cross-sectional area orthogonal to a ventilation direction in the exhaust duct 3 is larger than a cross-sectional area in the connecting portion 31 orthogonal to a ventilation direction. The drying device according to any one of the above. 6. The filter according to claim 1, wherein a filter is provided in the intake duct of the blower.
The drying device according to any one of claims 1 to 5. 7. The heating device according to claim 1, wherein the heating means is controlled so as to start at the same time as the start of the blower, or to start with a predetermined time later than the blower. The drying device according to any one of the above.