JPH0717023U - Room temperature and humidity dryer - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To provide a room temperature and constant humidity drying apparatus capable of uniformly dehumidifying and drying inputs such as grains and beans. [Structure] An air supply amount of dehumidifying air A supplied to a central portion having a large amount of accumulated grains is increased compared to an outer peripheral portion having a small amount of accumulated grains put into a drying hopper 3a. Alternatively, the amount of dehumidified air supplied to the right bottom is increased with respect to the left bottom of the drying hopper 3a adjacent to the dehumidified air supply side. That is, since the dehumidifying air of room temperature and constant humidity is uniformly supplied to the whole grain, the whole grain is uniformly dehumidified and dried,
The processing time required for dehumidifying and drying can be shortened, and the drying efficiency can be improved. In addition, the dehumidifying air A is formed by forming the bottom of the drying hopper into a zigzag shape such as a flower shape or a corrugated shape.
The amount of air sent to the product increases and the drying efficiency improves. In addition, since the dried grains are guided down the discharge port, the grains are slippery.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a room-temperature constant-humidity drying device used for dehumidifying and drying grains such as rice and wheat, or beans such as soybeans and edamame to an appropriate water content.

[0002]

[Prior art]

 Conventionally, as a method for dehumidifying and drying grains such as rice and wheat as in the above example, for example, there is a thermal drying method for dehumidifying and drying grain K with hot air heated to an appropriate temperature. In this method, the grain K accumulated on the hot air supply side is dried more than necessary, and the whole grain K cannot be uniformly dehumidified and dried. In addition, since the grain K is rapidly dried, there is a problem that the barrel is cracked or the color and luster are lost, and the quality and commercial value are impaired.

As a method of solving the above problem, for example, as shown in FIG. 10, a large number of dehumidifying air A supplied from a dehumidifying dryer (not shown) and having a constant humidity at room temperature is provided at the bottom of each storage bottle 37. There is a dehumidifying / drying device 38 for gradually dehumidifying and drying from the bottom side the grain K of rice, wheat, etc. blown out from each of the formed blowout holes 37a ...

[0004]

[Problems to be solved by the device]

 As described above, by dehumidifying and drying the grain K with the dehumidifying air A at room temperature and constant humidity, the problems caused by the thermal power drying method can be solved all at once. However, since the total amount of dehumidified air A blown out from the entire bottom of the storage bin 37 is constant, the ventilation efficiency of the dehumidified air A is high in the portion where the accumulation amount of the grain K is small, and it takes a short time. Although it is dehumidified and dried, the aeration efficiency of the dehumidifying air A is low in a portion where the amount of accumulated grains K is large, and the grains K that have been introduced into the bottom side of the storage hopper 37 are gradually dehumidified and dried. There is a problem that it takes time to uniformly dehumidify and dry the whole grain K put into the.

In view of the above problems, the present invention shortens the processing time required for dehumidifying and drying by uniformly supplying dehumidifying air to the entire input material put into the drying hopper, so that the entire input material is appropriately moisture-containing. It is an object of the present invention to provide a room-temperature constant-humidity dryer capable of dehumidifying and drying at a high rate.

[0006]

[Means for Solving the Problems]

 In the room temperature and constant humidity drying device according to claim 1 of the present invention, a ventilation hole formed in a portion where the amount of the input material charged into the drying hopper is small is provided in a portion where the amount of the input material is large. It is characterized in that the total amount of air supplied to the formed ventilation holes is increased.

According to a second aspect of the present invention, in the room-temperature constant-humidity drying device, the ventilation hole formed in the bottom surface of the other side of the dehumidifying air to be supplied to the drying hopper is provided with the ventilation hole formed in the bottom surface of the other side. The feature is that the total amount of air supplied to the pores is increased.

According to a third aspect of the present invention, in the room temperature and constant humidity drying apparatus, the bottom portion of the drying hopper is formed on the bottom portion of the drying hopper in combination with the configurations of the first and second aspects. It is characterized in that it is formed in a zigzag shape centering on the formed discharge port.

[0009]

[Action]

 The room-temperature constant-humidity drying device according to claim 1 discharges the room-temperature constant-humidity dehumidified air supplied from the dehumidifying dryer through each vent hole formed in the bottom surface of the drying hopper, and is introduced into the drying hopper. By increasing the amount of dehumidified air supplied to the part with a large amount of deposited input, the amount of input of dehumidified air to the drying hopper is uniformly dehumidified and dried with dehumidified air. To be done.

The room-temperature constant-humidity drying apparatus according to claim 2 discharges the room-temperature constant-humidity dehumidified air supplied from the dehumidifying dryer through each ventilation hole formed in the bottom of the drying hopper, and at the same time, the drying hopper By increasing the amount of dehumidified air supplied to the bottom surface of the other side of the supplied dehumidified air to the bottom surface of the other side, the dehumidified air uniformly dehumidifies and drys the input to the drying hopper. It

The room temperature and constant humidity drying apparatus according to claim 3 is the same as the above-described operations according to claims 1 and 2, with the discharge port formed at the bottom surface of the drying hopper as the center. By forming the bottom portion in a zigzag shape, the bottom area is increased and the amount of dehumidified air supplied is increased, so that the drying efficiency is improved. In addition, since the dried input material is guided downward toward the discharge port, slippage of the input material is improved.

[0012]

[Effect of device]

 This invention is designed to increase the amount of dehumidifying air supplied to a portion where a large amount of deposits are deposited, or to supply the dehumidifying air supplied to the bottom surface of the other side to the bottom surface of the dehumidifying air supply side. Since the amount of air is increased, it is possible to uniformly supply dehumidified air at room temperature and constant humidity to the entire input, and the entire input is uniformly dehumidified and dried, as well as the processing time required for dehumidification and drying. By shortening, the drying efficiency can be improved. Moreover, since the input is gradually dehumidified and dried from the lower layer side by the dehumidified air at room temperature and constant humidity, the entire input is properly moisturized without causing cracks or loss of color and gloss unlike the conventional thermal drying method. Dehumidification and drying can be performed at a high rate, and it is possible to reliably prevent the quality and commercial value of the input material from being impaired.

Further, since the bottom surface of the drying hopper is formed in a zigzag shape such as a flower shape or a corrugated shape, the bottom area of the drying hopper is increased, and the amount of dehumidified air supplied to the entire input is increased. The drying efficiency of the input material is improved. Moreover, since the dried input material is guided downward toward the discharge port, slippage of the input material is improved.

[0014]

【Example】

 An embodiment of the present invention will be described in detail below with reference to the drawings. The drawings show the room temperature and constant humidity drying apparatus of the first embodiment used for dehumidifying and drying grains such as rice and wheat to an appropriate moisture content as an example of the input, and in FIG. 1 and FIG. This room-temperature constant-humidity drying device 1 has a first drying hopper 3 and a second drying hopper 4 arranged in upper and lower stages inside a vertically-arranged cylindrical drying silo 2, and a load receiving step (not shown). Grains K such as rice and wheat supplied from the above are transferred by the screw conveyor 5 and supplied to the bucket conveyor 6, and the kernel K is raised by the bucket conveyor 6 to the respective drying hoppers 3 and 4 in the upper and lower stages. throw into. Dehumidifying air A having a constant humidity (about 65%) at room temperature supplied from a dehumidifying dryer 7 (for example, a dry air generator = DAG) is supplied to the upper and lower drying hoppers 3 and 4, respectively. Dehumidification drying is performed until a predetermined amount of grain K put into the drying hoppers 3 and 4 reaches a proper water content (about 15.5% to about 15.8%). The grain K discharged from the second drying hopper 4 on the lower stage side is transferred by the screw conveyor 8 and supplied to the bucket conveyor 6, and the grain K is raised by the bucket conveyor 6 and supplied to the next step. Alternatively, the grain K is reintroduced into the first drying hopper 3 on the upper stage side for dehumidification drying or temporary storage.

As shown in FIGS. 3, 4 and 5, the first drying hopper 3 described above has a charging port 3b opened in the central surface of the ceiling of the closed hopper body 3a, and the charging port 3b is closed. A conical equalizing plate 9 is provided on the lower surface side facing upward, and a branch pipe 23a of a supply pipe 23, which will be described later, is communicatively connected to the upper surface side of the charging port 3b, and opened at the ceiling of the hopper body 3a. An exhaust duct 24, which will be described later, is communicatively connected to the exhaust port 3c. Further, a lower limit level sensor S 1 for detecting the lower limit input level of the grain K and an upper limit level sensor S2 for detecting the upper limit input level of the grain K are vertically provided on the other side surface of the ceiling portion of the hopper body 3a. Then, the input amount of the grain K is increased or decreased based on the detection by these sensors S1 and S2.

In addition, the bottom surface of the hopper body 3a is formed in a pyramid shape (for example, a perfect circular shape, a conical shape such as an ellipse, or a polygonal pyramid shape such as a triangle, a quadrangle, a pentagon, etc.) having a small diameter toward the bottom. The discharge port 3d opened at the central bottom surface portion is connected to the input port 4b of the second drying hopper 4, which will be described later, and at the same time, small ventilation holes 3e are formed at the upper bottom surface portion of the hopper main body 3a. A large number of ventilation holes 3f with a large hole diameter are formed at a predetermined interval on the lower side bottom surface part to increase the amount of dehumidified air A supplied to the central part of the hopper body 3a. is doing. The vent holes 3e and 3f described above are set to a size that allows the dehumidifying air A to vent, and that prevents the grain K from falling.

As another structural example, as shown in FIG. 6, the number of the ventilation holes 3e formed in the upper bottom surface of the hopper body 3a is smaller than that of the ventilation holes 3e formed in the hopper body 3a. It is also possible to increase the number of holes in each of the ventilation holes 3e ... to increase the amount of air supplied from the dehumidifying air A supplied to the central portion of the hopper body 3a.

In addition, the first shutter 10 is provided at the discharge port 3d of the hopper body 3a so as to be openable and closable, and the first shutter 10 is horizontally opened and closed by an appropriate opening and closing means such as an air cylinder or an electric motor. , The grain K discharged from the first dry hopper 3 is supplied to the second dry hopper 4 in a downflow manner.

Further, a sealed first air supply chamber 11 is formed between a bottom surface portion of the first drying hopper 3 and a ceiling portion of a second drying hopper 4 described later, and one side of the first air supply chamber 11 is formed. An air supply duct 25, which will be described later, is communicatively connected to the air supply port 11a opened on the wall surface, and an air supply damper 12 is provided at the air supply port 11a of the first air supply chamber 11 so as to be openable and closable. The air supply damper 12 is opened / closed in the left-right direction by an appropriate drive means such as an electric motor to variably adjust the air supply amount of the dehumidifying air A supplied from the dehumidifying dryer 7 described later.

In addition, in the central deposition area of the hopper body 3a, the air supply ducts 13 and 13 each having a vertically open triangular shape and having a bottom open shape are connected in a cross shape for horizontal piping, and the intake air of each air supply duct 13 and 13 is taken. The side end portion is connected to the first air supply chamber 11, and the air supply valves 14 and the like are provided at the intake side end portions of the respective air supply ducts 13 and 13 so as to be openable and closable, and, for example, an air cylinder, an electric motor, or the like. The air supply valves 14 ... Are opened / closed by appropriate driving means to variably adjust the air supply amount of the dehumidified air A supplied from the first air supply chamber 11 to the air supply ducts 13, 13.

The above-mentioned second drying hopper 4 has the same structure as that of the above-mentioned first drying hopper 3, so that the illustration thereof is omitted. That is, the charging port 4b is opened in the central surface of the ceiling of the closed hopper body 4a, and the conical equalizing plate 15 is provided facing upward on the lower surface side of the charging port 4b and the upper surface of the charging port 4b. The discharge port 3c of the first drying hopper 3 described above is connected to the side, and the exhaust duct 24 described below is connected to the exhaust port 4c opened on the ceiling wall surface of the hopper body 4a. Further, a lower limit level sensor S3 for detecting the lower limit input level of the grain K 1 and an upper limit level sensor S4 for detecting the upper limit input level of the grain K 1 are vertically provided on the other side surface of the ceiling portion of the hopper body 3a. The input amount of the grain K is increased / decreased based on the detection by the sensors S3 and S4.

In addition, the bottom surface of the hopper body 4a is formed in a pyramid shape (for example, a conical shape such as a perfect circle or an ellipse, or a polygonal pyramid such as a triangle, a quadrangle, or a pentagon) having a small diameter downward. The discharge port 4d opened at the central bottom surface is connected to the inlet side end of the screw conveyor 8 via the rotary feeder 16, and the upper side bottom surface of the hopper main body 4a has small air holes 4e ... Are formed at a predetermined interval, and a large number of air holes 4f having a large hole diameter are formed at a lower surface of the lower side at a predetermined interval to feed the dehumidifying air A supplied to the central portion of the hopper body 4a. I have a large amount of energy. The vent holes 4e and 4f are set to have a size that allows the dehumidifying air A to pass therethrough and that prevents the grain K from falling.

As another structural example, the number of the ventilation holes 4e formed in the upper bottom surface of the hopper body 4a is smaller than the number of the ventilation holes 4e formed in the lower bottom surface of the hopper body 4a. The number of the dehumidified air A supplied to the central portion of the hopper body 4a may be increased by increasing the number.

In addition, the second shutter 17 is provided at the discharge port 4d of the hopper body 4a so as to be openable and closable, and the second shutter 17 is horizontally opened and closed by an appropriate opening and closing means such as an air cylinder and an electric motor. The grain K discharged from the second drying hopper 4 is supplied to the screw conveyor 8 while flowing down. At the same time, the rotary feeder 16 is rotationally driven by the driving force of an electric motor (not shown) to quantitatively supply the grain K discharged from the second drying hopper 4 to the screw conveyor 8.

Further, a second air supply chamber 18 is formed between the bottom surface of the second drying hopper 4 and the ceiling of the air intake chamber 26, which will be described later, and a side wall surface of the second air supply chamber 18 is formed. An air supply duct 18 to be described later is connected to the air supply port 18a opened at the same time, and an air supply damper 19 is provided at the air supply port 18a of the second air supply chamber 18 so as to be openable and closable. The air supply damper 19 is opened and closed in the left-right direction by an appropriate driving means such as an electric motor to variably adjust the air supply amount of the dehumidifying air A supplied from the dehumidifying dryer 7 described later.

In addition, in the central accumulation area of the hopper main body 4, each of the air supply ducts 20 and 20 each having a vertically open triangular shape, which is formed into an open bottom surface, is connected in a cross shape to form a horizontal pipe, and each of the air supply ducts 20 and 20 is connected. The intake side end is connected to the second air supply chamber 18, and the intake side ends of the respective air supply ducts 20, 20 are provided with respective air supply valves 21 ... The air supply valves 21 ... Are opened / closed by an appropriate drive means such as a motor, and the amount of dehumidified air A supplied from the second air supply chamber 18 to the air supply ducts 20, 20 is variably adjusted.

The bucket conveyor 6 has the bucket conveyors 6 arranged vertically along the rear outer wall surface of the drying silo 2, and the outlets of the screen conveyors 5 and 8 are provided at the lower end side inlets of the bucket conveyors 6. The side ends are connected for communication, the inlet side end of one screw conveyor 5 is connected to the load receiving process (not shown), and the inlet side end of the other screw conveyor 8 is discharged from the second drying hopper 4. It is connected to the outlet 4d. In addition, the supply pipe 23 is connected to the outlet on the upper end side of the bucket conveyor 6 via the distributor 22, and the supply pipe 23 is branched into two right and left so that one branch pipe 23a is connected to the first drying hopper 3. And the other branch pipe 23a is connected to the next process such as a selection process, a rice polishing process or a storage process.

The exhaust duct 24 described above is formed by vertically piping the exhaust duct 24 along an outer wall surface on one side of the drying silo 2, and branching the upper end side of the exhaust duct 24 into two upper and lower parts. The exhaust port 3c of the first drying hopper 3 and the exhaust port 4c of the second drying hopper 4 are connected to each other, and the lower end of the exhaust duct 24 is connected to, for example, a dust collector (not shown).

The air supply duct 25 is formed by vertically piping the air supply duct 25 along the outer wall surface on the other side of the drying silo 2, and the upper end side of the air supply duct 25 is branched into two upper and lower parts. The air supply port 11a of the first air supply chamber 11 and the air supply port 18a of the second air supply chamber 18 are connected to each other, and the lower end side of the air supply duct 25 is provided in the intake chamber 26 described later. It is connected to the discharge side of the blower 27. That is, the blower 27 is rotationally driven by the driving force of the drive motor 28 with a speed reducer via the pulleys 29, 30 and the drive belt 31, and the dehumidified air A supplied from the dehumidifying dryer 7 to be described later is first blown. Air is supplied to the chamber 11 and the second air supply chamber 18.

The dehumidifying dryer 7 described above has an intake chamber 26 formed between the bottom and the floor of the second drying hopper 4 constituting the drying silo 2, and the dehumidifying dryer 7 is provided on the floor of the intake chamber 26. And the blower 27 are arranged in close proximity to each other, one end side of the intake duct 32 is connected to the intake port 26a opened on one side wall surface of the intake chamber 26, and the other end side of the intake duct 32 is connected. , For example, it is open to the atmosphere side via a net or a filter. That is, by driving the dehumidifying dryer 7 and the blower 27, the outside air taken in from the intake duct 32 is condensed and liquefied by an evaporator (not shown) incorporated in the dehumidifying dryer 7, and the atmosphere is condensed. It is restored to room temperature by (not shown). Dehumidified air A, which has been dehumidified to a constant humidity (about 65%) at room temperature, is sent to the first air supply chamber 11 on the upper stage side and the second air supply chamber 18 on the lower stage side via the air supply duct 25.

With the illustrated embodiment configured as described above, a method of drying the grain K by the room temperature and constant humidity drying apparatus 1 will be described below. First, the allocator 22 is driven to open the branch pipe 23a side of the supply pipe 23 connected to the bucket conveyor 6 and close the branch pipe 23b side, and then the unsupplied material from the cargo receiving step (not shown) is supplied. The first dry hopper, in which the dried grain K is transferred by the screw conveyor 5 and supplied to the bucket conveyor 6, and the undried grain K is raised by the bucket conveyor 6 and arranged on the upper stage side of the drying silo 2, Add to 3 sequentially.

As shown in FIG. 1, after a predetermined amount of grain K is put into the first drying hopper 3, the dehumidifying drier 7 and the blower 27 are driven to maintain a constant humidity (about 65%) at room temperature. The dehumidified dehumidified air A is fed to the air feeding duct 25, the air feeding damper 12 is opened, the air feeding damper 19 is closed, and the dehumidified air A at room temperature and constant humidity is fed to the first air feeding chamber 11 Send to. Dehumidifying air A is discharged from the small-diameter air holes 3e formed in the upper-side bottom surface portion of the first drying hopper 3 and the large-diameter air holes 3f formed in the lower-side bottom surface portion.

At the same time, the air supply valves 14 ... Are opened and the dehumidified air A is blown downward from the lower surface side of the air supply ducts 13 and 13 which are arranged in the center of the first drying hopper 3. The whole grain K put into the drying hopper 3 is gradually dehumidified and dried by the dehumidifying air A discharged from the bottom portion and the central portion (for example, about 24 hours), and at the same time, compared with the outer peripheral portion where the accumulation amount of the grain K is small. Since a large amount of dehumidifying air A is supplied to the central portion where the accumulation amount of the grain K is large, the dehumidifying air A is evenly supplied to the whole grain K put into the first drying hopper 3, The whole grain K can be uniformly dehumidified and dried.

Next, after the primary drying is completed, the air supply damper 12 and the respective air supply valves 14 ... Are closed, the first shutter 10 is opened, and the dehumidified and dried grain from the discharge port 3d of the first drying hopper 3 is dried. The particles K are allowed to flow down by their own weight and are sequentially charged into the second drying hopper 4 arranged on the lower stage side. After the injection is completed, the first shutter 10 is closed, the air supply damper 19 is opened, and the dehumidified air A at room temperature and constant humidity is supplied to the second air supply chamber 18. Dehumidified air A is discharged from the small-diameter air holes 4e formed on the upper-side bottom surface of the second drying hopper 4 and the large-diameter air holes 4f formed on the lower-side bottom surface.

At the same time, the air supply valves 21 ... Are opened and the dehumidified air A is blown downward from the lower surface side of the air supply ducts 20, 20 that are arranged in the center of the second drying hopper 4. Grain K put in the dry hopper 4 is gradually dehumidified and dried by the dehumidifying air A discharged from the bottom part and the central part (for example, 24 hours), and the grain K put in the second dry hopper 4 is Since a large amount of dehumidifying air A is supplied to the central portion where the amount of grain K accumulated is larger than to the peripheral portion where the amount of accumulation is small, the dehumidifying air A is fed to the entire grain K that has been put into the second drying hopper 4. A is uniformly supplied, and the whole grain K can be dehumidified and dried to a proper water content (about 15.5% to about 15.8%).

Next, after the secondary drying is completed, the distributor 22 is driven to close the branch pipe 23a side of the supply pipe 23 connected to the bucket conveyor 6 and open the branch pipe 23b side, and then supply air. The damper 19 and each air supply valve 21 are closed, the second shutter 17 is opened, the dehumidified and dried grain K is allowed to flow down from the discharge port 4d of the second drying hopper 4 by its own weight, and the rotary feeder 16 is driven. Then, the grain K discharged from the discharge port 4d of the second drying hopper 4 is quantitatively supplied to the screw conveyor 8. The dried grain K is transferred by the screw conveyor 8 and supplied to the bucket conveyor 6, and the dried grain K is raised by the bucket conveyor 6 to raise the dried grain K to the next step such as the selection step, the rice polishing step or the storage step. Supply to.

Alternatively, the grain K discharged from the second drying hopper 4 is reintroduced into the first drying hopper 3 on the upper stage side via the screw conveyor 8 and the bucket conveyor 6 so as to be arranged on the upper stage side. Grains K are put into the first drying hopper 3 and the second drying hopper 4 arranged on the lower side, and the dehumidifying and drying can be repeated many times until the moisture content becomes appropriate.

As described above, the dehumidifying air supplied to the portion where the accumulation amount of the grain K is large compared to the portion where the accumulation amount of the grain K input to the first drying hopper 3 and the second drying hopper 4 is small. Since the air supply amount of A 2 is increased, the dehumidifying air A can be uniformly supplied to the whole grain K put into the first drying hopper 3 and the second drying hopper 4, and the whole grain K can be evenly distributed. In addition to being dehumidified and dried, the processing time required for dehumidification and drying can be shortened and the drying efficiency can be improved.

Moreover, since the grain K put into the first drying hopper 3 and the second drying hopper 4 is gradually dehumidified and dried from the lower layer side by the dehumidifying air A at room temperature and constant humidity, the conventional thermal drying method is used. The whole grain K can be dehumidified and dried to an appropriate moisture content without cracking or loss of color and gloss, and the quality and commercial value of the grain K can be reliably prevented from being impaired. .

Moreover, by forming the bottom portion of the drying hopper into a cross-sectional shape such as a flower shape or a corrugated shape, the bottom surface area of each of the drying hoppers 3 and 4 is larger than that of the storage bottle 37 that constitutes the conventional device. Since the total amount of dehumidified air discharged from the bottoms of the respective drying hoppers 3 and 4 is increased, the drying efficiency is improved. Since the bottom area of the drying hopper increases and the total amount of dehumidified air sent increases, the efficiency of drying the input is improved, and the dried input is guided downward toward the outlet, so the input slips. Will get better.

FIG. 7 shows an example of a structure in which the hole diameters formed on the right bottom surfaces of the first drying hopper 3 and the second drying hopper 4 are enlarged, and the first drying hopper 3 shown in the drawing is the feeding chamber of the first air feeding chamber 11. The hole diameters of the respective ventilation holes 3f formed on the right side bottom surface portion of the first drying hopper 3 are smaller than the hole diameters of the respective ventilation holes 3e formed on the left side bottom surface portion of the first drying hopper 3 close to the air outlet 11a. It is set large. That is, when the grain K put into the first drying hopper 3 is dehumidified and dried by the dehumidifying air A discharged from the air supply port 11a of the first air supply chamber 11, the air is supplied to the air supply port 11a of the first air supply chamber 11 through the air supply port 11a. Dehumidifying air A is positively supplied only to the left side bottom surface of the adjacent first drying hopper 3, and is supplied to the right side bottom portion of the dehumidifying air A supplied to the left side bottom portion of the first drying hopper 3. The amount of dehumidified air A to be supplied is small, and it takes time to uniformly dehumidify and dry the whole grain K. However, in the same embodiment, the dehumidified air A supplied to the left bottom part of the first drying hopper 3 is fed. Since the air supply amount of the dehumidifying air A supplied to the bottom portion on the right side is larger than the air amount, the dehumidifying air A is uniformly supplied to the whole grain K fed into the first drying hopper 3. The whole grain K can be uniformly dehumidified and dried.

Similarly to the above, the second drying hopper 4 has a diameter smaller than that of each of the ventilation holes 4e ... Formed on the left bottom surface of the second drying hopper 4 near the air supply port 18a of the second air supply chamber 18. By increasing the diameter of each of the ventilation holes 4f formed in the bottom surface on the right side of the above, the same operational effect as that of the above-described first drying hopper 3 can be obtained. The above-mentioned second drying hopper 4 has the same structure as the first drying hopper 3, and therefore its illustration is omitted.

FIG. 8 shows an example of a structure in which the number of holes formed on the right bottom surface of the first drying hopper 3 and the second drying hopper 4 is increased. The number of the ventilation holes 3e formed on the right side bottom surface portion is set to be larger than the number of the ventilation holes 3e formed on the left side bottom surface portion of the first drying hopper 3 close to the air supply port 11a. There is. That is, as in the second embodiment, the amount of dehumidified air A supplied to the bottom of the first drying hopper 3 is made larger than the amount of dehumidified air A supplied to the bottom of the left side of the first drying hopper 3. Therefore, like the second embodiment described above, the dehumidifying air A is evenly supplied to the whole grain K put into the first drying hopper 3 to uniformly dehumidify and dry the whole grain K. be able to.

Similarly to the above, the number of the ventilation holes 4e ... Formed on the left bottom surface of the second drying hopper 4 adjacent to the air supply port 18a of the second air supply chamber 18 is larger than the number of the second drying hoppers. By increasing the number of the ventilation holes 4e ... Formed on the bottom surface on the right side of 4, the same operational effect as that of the first drying hopper 3 described above can be obtained. The above-mentioned second drying hopper 4 has the same structure as the first drying hopper 3 and therefore is not shown.

FIG. 9 shows an example of a structure in which the bottom surfaces of the first drying hopper 3 and the second drying hopper 4 are formed in a cross-sectional shape such as a flower shape or a corrugated shape. A bottom surface of the hopper body 3a is formed in a zigzag shape such as a flower shape or a corrugation centering on the discharge port 3d formed in the center of the bottom surface. That is, the bottom area of the first drying hopper 3 is increased and the amount of dehumidified air A supplied to the whole grain K is increased, so that the drying efficiency of the grain K is improved. Moreover, since the grain K that has been put into the first drying hopper 3 is guided downward toward the discharge port 3d, the grain K can be slipped well.

Similar to the above, by forming the bottom portion of the second drying hopper 4 in a cross-sectional shape such as a flower shape or a corrugated shape, the same operational effect as that of the first drying hopper 3 described above can be obtained. The above-described second drying hopper 4 has the same structure as the first drying hopper 3, and therefore the illustration thereof is omitted.

In the correspondence between the configuration of the present invention and the above-described embodiment, the drying hopper of the present invention corresponds to the first drying hopper 3 and the second drying hopper 4 of the embodiment, and so on. The input corresponds to the grain K, but the present invention is not limited to the configuration of the above-described embodiment.

In the above-mentioned first embodiment, the first drying hopper 3 and the second drying hopper 4 are arranged in two stages inside the drying silo 2 which constitutes the room temperature and constant humidity drying apparatus 1. However, for example, 3 Drying hoppers may be arranged in a large number of stages, such as four stages, five stages, and the like, and the number of stages is not limited to that in the embodiment.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an internal structure of a room temperature and constant humidity drying apparatus.

FIG. 2 is a side view showing the outer shape of the dry silo.

FIG. 3 is a vertical cross-sectional side view showing the internal structure of a drying hopper.

FIG. 4 is a cross-sectional plan view showing the internal structure of the drying hopper.

FIG. 5 is a vertical cross-sectional side view showing a structural example in which a large ventilation hole is formed in the bottom surface portion on the lower side of the drying hopper.

FIG. 6 is a vertical cross-sectional view showing a structural example in which a large number of ventilation holes are formed in the lower bottom surface portion of the drying hopper.

FIG. 7 is a vertical cross-sectional side view showing a structural example in which a large ventilation hole is formed in the right bottom surface portion of the drying hopper.

FIG. 8 is a vertical cross-sectional side view showing a structural example in which a large number of vent holes are formed in the right bottom surface portion of the drying hopper.

FIG. 9 is a cross-sectional plan view showing a structural example in which the bottom portion of the drying hopper is formed in a flower-shaped cross section.

FIG. 10 is a vertical sectional side view showing a conventional drying device.

[Explanation of symbols]

 A ... Dehumidifying air K ... Grain 1 ... Room temperature / humidity drying device 2 ... Drying silo 3 ... First drying hopper 3a ... Hopper body 3e, 3f ... Vent hole 4 ... Second drying hopper 4a ... Hopper body 4e, 4f ... Communication Pore 6 ... Bucket conveyor 7 ... Dehumidifying dryer 11 ... First air supply chamber 11a ... Air supply port 18 ... Second air supply chamber 18a ... Air supply port 24 ... Exhaust duct 25 ... Air supply duct 26 ... Air intake chamber 27 …Blower

Claims (3)

[Scope of utility model registration request] 1. Dehumidifying air having a constant humidity at room temperature supplied from a dehumidifying dryer is discharged from a large number of vent holes formed on the bottom surface of the drying hopper, and the material charged into the drying hopper is placed on the lower layer side. A constant temperature and constant humidity drying apparatus for dehumidifying and drying from the above, wherein a ventilation hole formed in a portion where a large amount of the input material is loaded into the drying hopper is formed in a portion where a large amount of the input material is deposited. Room temperature and constant humidity dryer with a large total amount of air supplied to the pores. 2. Dehumidifying air having a constant humidity at room temperature supplied from a dehumidifying dryer is discharged from a large number of vent holes formed in the bottom surface of the drying hopper, and the material charged into the drying hopper is placed on the lower layer side. A room temperature and constant humidity drying device for dehumidifying and drying from the above, wherein the total amount of air sent through the ventilation holes formed on the bottom surface of the other side with respect to the ventilation holes formed on the supply side bottom surface of the dehumidifying air supplied to the drying hopper. Room temperature and humidity drying device with large size. 3. The room-temperature constant-humidity drying apparatus according to claim 1 or 2, wherein the bottom surface of the drying hopper is formed in a zigzag shape centering on the discharge port formed in the bottom surface of the drying hopper.