JP7146583B2 - Drying container ventilation control system - Google Patents

Description

The present invention relates to a blower control system for drying containers.

The air blow control system for the drying container consists of a container body having an air blower port for blowing hot air into the inside for drying a large number of wood chips (objects to be dried), and a container body for blowing hot air into the air blower port of the container body. and a temperature sensor and a humidity sensor for detecting the temperature and humidity in the container body. When the temperature inside the container body rises above the set temperature and the humidity inside the container body falls below the set humidity, the temperature sensor and humidity sensor detect that the temperature from the hot air delivery device to the air outlet is detected. The intake of hot air is stopped (for example, Patent Document 1).

JP 2017-132146 A

In the configuration of Patent Document 1, since hot air is continuously sent at a constant blowing rate until the hot air sending device is stopped after being driven, there is an inconvenience that energy (electric power) is wasted. is requested.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a drying container ventilation control system capable of satisfactorily drying an object to be dried without wasting energy (electric power).

The drying container air blowing control system of the present invention comprises a box-shaped container body provided with an air blowing port for blowing air into the inside for drying a large number of moisture-containing materials to be dried; a blower for feeding the container body, a sensor for detecting the temperature or humidity in the container body, and a control device for controlling the blower based on the detected value from the sensor, wherein the sensor causes the container body When it is detected that the temperature inside the container body has started to rise, or when the sensor detects that the humidity inside the container body has started to decrease, the control means for controlling the blowing amount of the blower to decrease It is characterized in that it is provided in the control device.

The material to be dried evaporates from moisture close to the surface. In addition, it takes a long time for moisture that has soaked into the material to be dried to come out to the surface. Therefore, even if the air blower is operated with a constant air blow rate from the start of drying to the end of drying, the air blow becomes excessive especially in the latter half of the drying work, and energy (electric power) is wasted. By the way, when the moisture on the surface of the material to be dried evaporates, the temperature inside the container body begins to rise, or the humidity inside the container body begins to drop. Therefore, when the sensor detects that the temperature inside the container body has begun to rise, or when the sensor detects that the humidity inside the container body has begun to decrease, control is performed to reduce the amount of air blown by the blower. Thus, wasteful consumption of energy (electric power) can be suppressed. Moreover, even if the blowing amount of the air blower is reduced, the temperature inside the container body begins to rise, or the humidity inside the container body begins to fall, so that the drying progress of the material to be dried does not significantly decrease. . As a result, the material to be dried can be satisfactorily dried without wasting energy (electric power).

Further, in the dry container blower control system of the present invention, the sensor detects the temperature or humidity inside the container body when the blower device starts blowing air, and the temperature set value or the humidity is higher than the temperature detected by the sensor. A setting means is provided for setting a humidity setting value lower than the humidity detected by the sensor, and the control means controls the operation of the blower when the temperature setting value or the humidity setting value set by the setting means is reached. Control may be performed to reduce the amount of air blown.

Further, in the drying container blower control system of the present invention, the control device detects the temperature or humidity in the container body detected by the sensor at a change rate of temperature rising per unit time or decreasing per unit time. If the rate of change becomes greater than the rate of change obtained when the air blower starts blowing air, the control means performs control to reduce the air blowing rate of the air blower. you can go

Further, the air blast control system for a drying container of the present invention includes a blast temperature sensor that detects the temperature of the blast air from the blower, and the temperature detected by the sensor that detects the temperature inside the container body is detected by the blast temperature sensor. The control device may be provided with a first stopping means for stopping the air blowing of the air blower when the temperature becomes the same as the detected temperature.

When the temperature detected by the sensor that detects the temperature inside the container body becomes the same as the temperature detected by the air temperature sensor that detects the air temperature from the air blower, it is determined that drying of the material to be dried is completed. Then, the blowing of the air blower is stopped by the first stopping means provided in the control device. After that, the blower is stopped, so energy (electric power) is not wasted.

Further, in the drying container blower control system of the present invention, the sensor detects that the temperature inside the container body has reached a preset set temperature, or that the humidity inside the container body has been preset. The controller may be provided with second stopping means for stopping blowing of the blower by detecting that the humidity has been reached.

As described above, when the sensor detects that the temperature inside the container body has reached the preset set temperature or that the humidity inside the container body has reached the preset set humidity, When it is judged that the drying of the material to be dried is completed, the air blowing of the air blower is stopped by the second stopping means provided in the control device. After that, the blower is stopped, so energy (electric power) is not wasted.

Further, in the air blow control system for a drying container of the present invention, the container body is provided with an air flow retention space for guiding the air from the air blower to the large number of objects to be dried, The sensor may be arranged at a position straddling the material to be dried.

As described above, the completion of drying can be accurately detected by arranging the sensor at a position straddling the large number of objects to be dried from the airflow retention space. Therefore, it is possible to accurately detect the time to stop blowing air from the blower.

According to the present invention, when the sensor detects that the temperature inside the container body has begun to rise, or when the sensor detects that the humidity inside the container body has begun to decrease, control is performed to reduce the air blow rate of the blower. By doing so, it is possible to provide a drying container ventilation control system that can satisfactorily dry the material to be dried without wasting energy (electric power).

It is a control block diagram of the ventilation control system of a drying container. 1 is a front view of a dry container system including dry containers; FIG. FIG. 10 is a plan view showing the same drying container system, showing a configuration of the advance/retreat means in a retracted posture; FIG. 2 is a plan view showing the same drying container system, showing the configuration of the advancing/retreating means in an advanced posture; Fig. 2 is a right side view showing the same dry container system with the airflow supply mechanism and the connecting pipe removed; FIG. 4 is a plan view showing a frame forming a double bottom of a drying container provided in the same drying container system; It is a top view which shows the structure of the said advance-and-retreat means periphery. It is a side view which shows the structure of the said advance-and-retreat means periphery. FIG. 5 is a cross-sectional view taken along the line IX-IX in FIG. 4, showing a state in which chips are accommodated in the drying container before starting drying. FIG. 5 is a cross-sectional view taken along the line IX-IX of FIG. 4, showing a state in which the chips after completion of drying are housed in the drying container; Fig. 3 is a graph showing the temperature inside the drying container as a function of the temperature of the air blown from the blower; Fig. 3 is a graph showing the humidity inside the drying container changing with respect to the air humidity from the blower; FIG. 11 is a control block diagram of another form of the air blow control system for the drying container;

A ventilation control system for a drying container according to an embodiment of the present invention will be described below. For convenience of explanation, the following directions are based on the directions shown in FIG. 2 for the vertical direction. Regarding the front-rear direction, the left side in the state shown in FIGS. 2 and 3 is positioned forward of the vehicle when mounted, so it is referred to as the front, and the right side is positioned rearward of the vehicle when mounted, so is referred to as the rear. Further, the width direction is a direction that coincides with the vehicle width direction when mounted.

A large number of materials to be dried having water content are wood chips (hereafter referred to as "chips") which are a large number of granular materials. It is one component of S. By adding the sensor 16, the air blower 18, and the control device 19 shown in FIG. 1 to the dry container system S, a dry container air blow control system is configured. The drying container system S mainly comprises a drying container 1 , an airflow supply mechanism 2 and a connecting pipe 3 . The drying container 1 includes a container body 11, which will be described later, and is configured to be mountable on a vehicle (not shown). A large number of chips housed in the drying container 1 are dried by blowing air to evaporate the water adhering to the outer surface and the water contained in the wood structure (including molecular level water). Dried chips are used, for example, in woody biomass power generation. Drying facilitates combustion during power generation and reduces the weight by the amount of water removed, which is advantageous for transportation, for example.

The airflow supply mechanism 2 is a mechanism capable of generating hot air, for example, and includes an air blower 18 (see FIG. 1) and a heater (not shown). 1, the control device 19 includes control means 23 for reducing the amount of air blown by the air blower 18 based on the detected value from the sensor 16. As shown in FIG.

As described above, the material to be dried (chip) evaporates from moisture near the surface. In addition, it takes a long time for moisture that has soaked into the material to be dried to come out to the surface. Therefore, even if the air blowing device 18 is operated with a constant air blowing amount from the start of drying to the end of drying, energy (electric power) is wasted. By the way, when the moisture on the surface of the material to be dried evaporates, the temperature inside the container body 11 begins to rise, or the humidity inside the container body 11 begins to fall. Therefore, when the sensor 16 detects that the temperature inside the container body 11 has begun to rise, or when the sensor detects that the humidity inside the container body 11 has begun to decrease, the blowing amount of the blower 18 is reduced. Wasteful consumption of energy (power) can be suppressed by performing control. Moreover, even if the amount of air blown by the air blower 18 is reduced, the temperature inside the container body 11 is beginning to rise, or the humidity inside the container body 11 is beginning to drop, so the degree of drying of the chips (objects to be dried) does not improve. does not decline significantly. As a result, the chips (objects to be dried) can be satisfactorily dried without wasting energy (electric power).

A heat source for heating the airflow can be provided outside the airflow supply mechanism 2, for example, when heating is performed using exhaust heat from another device. The heating temperature and heating time of the airflow are appropriately set according to the degree of dryness and amount of chips stored in the drying container 1 . Also, depending on the situation, it is possible to perform only air blowing without performing heating. The connecting pipe 3 is a pipe that connects the drying container 1 and the airflow supply mechanism 2 to send the airflow (hot air) generated by the airflow supply mechanism 2 to the drying container 1, and a pipe or a hose can be used. In this embodiment, a hose (duct hose) having a circular cross section is used.

The sensor 16 detects that the temperature inside the container body 11 has started to rise, or the sensor 16 detects that the humidity inside the container body 11 has started to fall, basically, by the following two means. It means to detect by As a first means, the sensor 16 detects the temperature or humidity in the container body 11 at the beginning of blowing by the blower 18, and the temperature set value higher than the temperature detected by the sensor 16 or the humidity detected by the sensor 16 setting means (not shown) for setting a humidity setting value lower than When it detects that the humidity inside the container body 11 has started to rise or that the humidity inside the container body 11 has started to drop, control is performed to reduce the amount of air blown by the air blower 18 . The setting means may be configured such that the controller 19 automatically sets a temperature set value higher than the temperature detected by the sensor 16 or a humidity set value lower than the humidity detected by the sensor 16, The high temperature set value or the low humidity set value may be artificially (manually) input. Specifically, the temperature setting value or the humidity setting value in the container body 11 at which air starts to be blown is set based on the temperature and humidity data obtained (by sampling) in the trial. Since the temperature and humidity data in the container body 11 contain blurring (noise), a value higher than the maximum value where the data blurring (noise) is the largest is set in advance as the temperature setting value or the humidity setting value. back. Alternatively, fluctuation (noise) may be predicted from temperature data in the container body 11 at the beginning of air blowing, and a value higher than the maximum value of the largest fluctuation (noise) may be set as the start timing of air blowing. The temperature setting value or humidity setting value is determined based on the detection value of the sensor 16, or based on the detection value of the blast temperature sensor 22, or based on the detection values of both the sensor 16 and the blast temperature sensor 22. you can go

As a second means, the control device 19 obtains the rate of change in the temperature or humidity that rises per unit time or the humidity that falls per unit time based on the temperature or humidity inside the container body 11 detected by the sensor 16. 23 detects that the temperature inside the container body 11 has started to rise when the rate of change becomes larger than the rate of change obtained when the air blower 18 starts blowing air, or detects the temperature inside the container body 11. It detects that the humidity has started to drop, and controls the air blowing volume of the air blower 18 to be small. The rate of change is the amount of increase in temperature or the amount of decrease in humidity per unit (fixed) time. Specifically, for example, in the case of temperature, the temperature is detected by the sensor 16 at a predetermined timing when air blowing is started, and the rate of change (or the amount of change) of the temperature rise per unit time is calculated based on the detected temperature. A higher (larger) rate of change (or amount of change) than the rate of change (or amount of change) obtained is set as a set value, and the rate of change (or amount of change) obtained based on the temperature detected by the sensor 16 is set. When the rate of change (or the amount of change) becomes high, it is detected that the temperature inside the container body 11 has started to rise. In this case, a high change rate (or change amount) is set in consideration of blurring (noise) as described above. In the case of humidity, the humidity in the container body 11 is sampled by the sensor 16 at a predetermined timing when air blowing is started, and based on the detected humidity, the rate of change in humidity that decreases per unit time ( or amount of change) is obtained, a higher (larger) rate of change (or amount of change) than the rate of change (or amount of change) is set as a set value, and the rate of change obtained based on the humidity detected by the sensor 16 is set. When the rate of change (or the amount of change) becomes high, it is detected that the humidity inside the container body 11 has started to decrease. Also in this case, setting a high rate of change (or amount of change) is made in consideration of blurring (noise) as described above. In this way, by setting the temperature set value or humidity set value or change rate (or change amount) in consideration of the fluctuation (noise) of the temperature and humidity data at the beginning of air blowing, for example, the temperature begins to rise Simply detecting that (humidity has started to fall) and reducing the air blowing volume of the air blower 18 in a state in which drying is not stable, wastes a lot of drying time and deteriorates drying efficiency. can be prevented. When the rate of change of the rate of change is small, the temperature inside the container body 11 begins to rise or the temperature inside the container body 11 starts It may be configured to detect when the humidity begins to drop.

The graph in FIG. 11 shows the air temperature L1 (solid line) detected by the air temperature sensor 22 provided in the air blower 18 and the temperature L2 (broken line) detected by the sensor 16 provided in the container body 11. The graph of FIG. 11 shows the timing time T1 at which the sensor 16 detects that the temperature inside the container body 11 has started to rise. At this timing time T1, as described above, the blowing volume of the blower 18 is made smaller than during normal operation. In the graph of FIG. 12, the air humidity L4 (broken line) detected by the air humidity sensor (not shown) provided in the air blower 18 and the humidity L3 (solid line) detected by the sensor 16 provided in the container body 11 are shown. ). The graph of FIG. 12 shows the timing time T3 at which the sensor 16 detects that the humidity inside the container body 11 has started to decrease. At this timing time T3, as described above, the blowing volume of the blower 18 is made smaller than during normal operation. The air blowing volume of the air blowing device 18 may be set to any value such as half, 1/3, or 1/4 of the normal operation, and can be changed according to the amount of the material to be dried and the degree of drying. is. By detecting that the temperature inside the container main body 11 has started to rise or that the humidity inside the container main body 11 has started to fall, the blowing volume of the blower 18 is made smaller than during normal operation. However, both temperature and humidity may be measured, and the blowing volume of the blower 18 may be made smaller than during normal operation at earlier timing T1 or T3 (or later timing).

11, when the temperature L2 (dashed line) inside the container body 11 detected by the sensor 16 becomes the same as the air temperature L1 (solid line) from the air blower 18 (timing time T2 shown in FIG. 11). ), and is configured to stop driving the blower 18 by a signal from the control device 19 . The temperature of the air blown from the air blower 18 is the temperature detected by the air temperature sensor 22 provided at the air blow port 116 shown in FIG. Although the air temperature sensor 22 is provided at the air outlet 116 of the container body 11, it may be provided on the air blower 18 side. As shown in FIG. 1, the controller 19 receives the temperature detected by the air temperature sensor 22 and the temperature inside the container body 11 detected by the sensor 16, and these two temperatures become the same. A first stopping means 20 for stopping the blowing of the air blower 18 is sometimes provided. 12, when the humidity L3 (solid line) inside the container body 11 detected by the sensor 16 becomes the same as the air humidity L4 (broken line) from the air blower 18 (timing time T4 shown in FIG. 12). ), and is configured to stop driving the blower 18 by a signal from the control device 19 . In this case as well, the controller 19 receives the humidity detected by the blast humidity sensor (not shown) and the humidity in the container body 11 detected by the sensor 16, and the two humidity values become the same. A first stopping means 20 (see FIG. 1) is provided for stopping the blowing of the air blower 18 when the air blower 18 is closed.

The drying container 1 has a substantially rectangular parallelepiped shape similar to a general vehicle-mounted container, and when used as a drying container system S shown in FIGS. is a box-like body closed except for the blower port 116 to which the connecting pipe 3 is connected. Chips are introduced into the drying container 1 from the upper surface thereof.

The drying container 1 can receive the airflow (hot air) sent from the airflow supply mechanism 2 via the connecting pipe 3 at the bottom, which is the portion near the bottom, and then apply the airflow to a large number of accommodated chips. It has a double bottom structure. For this reason, the drying container 1 mainly includes a container body 11 , advancing/retreating means 15 and the sensor 16 . The drying container 1 includes a deck 12, a support plate 13, a sub-support plate 14, etc., as shown in FIG.

The container main body 11 is a portion appearing in the appearance of the drying container 1 . In addition to the bottom portion, the container body 11 has, as side portions connected to the outer edge of the bottom portion, for example, a pair of narrow side surfaces 110 opposed in the front-rear direction and a pair of wide side surfaces 117 opposed in the width direction. (See FIGS. 3 and 4). The pair of wide side surfaces 117 includes a first wide side surface 118 located on one side in the width direction (upper side in FIGS. 3 and 4) and a second wide side surface 118 located on the other side in the width direction (lower side in FIGS. 3 and 4). two wide sides 119; The pair of narrow side surfaces 110 has a front side surface 111 located forward and a rear side surface 115 located rearward. The bottom and side surfaces of the container body 11 are reinforced by forming ribs or the like.

A hook engaging portion 112 protrudes from the front side surface 111 to which a hook provided on a movable arm on the vehicle side is hooked when the drying container 1 is mounted on the vehicle. Further, a roller 113 that rolls on the ground or road surface is provided at the rear of the bottom portion when the vehicle is loaded and unloaded. A pair of rollers 113 are provided in the width direction of the container body 11, as shown in FIG. Further, a leg portion 114 is provided in front of the bottom portion to be grounded together with the roller 113 when installed (see FIG. 2). A pair of the legs 114 are also provided in the width direction of the container body 11 .

As shown in FIGS. 2 and 5, a blower port 116 for communicating between the inside and outside of the container body 11 and to which the connecting pipe 3 can be connected is provided at the lower portion of the rear side surface 115 of the container body 11 and at the center in the width direction. is provided. Further, as shown in FIG. 5, a door 1151 is provided on the rear side surface 115 of the container body 11. For example, when chips are taken out or the inside of the container body 11 is cleaned, the air outlet 116 can be opened. can be opened except for the surrounding area.

The deck 12 is a plate-like portion having a plurality of through holes 121 penetrating in the thickness direction, and is provided parallel to the bottom surface of the container body 11 at a certain height from the bottom surface (Figs. See Figure 4). An airflow retention space is formed between the bottom surface of the container body 11 and the deck 12 . The air outlet 116 communicates with the outside of the container body 11 between the bottom surface of the container body 11 and the deck 12 . In order to introduce a large amount of airflow, the height dimension of the air blowing port 116 is set larger than the distance in the height direction between the bottom surface of the container body 11 and the deck 12 . For this reason, a ventilation guide portion 17 for adjusting the height dimension is provided inside the container body 11 . As shown in FIGS. 3, 4, and 6, the air-blowing guide portion 17 is a box-shaped portion having an isosceles triangular shape in a plan view and a trapezoidal shape in a vertical cross-sectional view (vertical cross-sectional view). be. A rear end portion of the internal space of the air guide portion 17 is connected to the air blow port 116 . Further, the lower end portion of the internal space of the air guide portion 17 is connected to the airflow retention space. The upper surface of the air-blowing guide portion 17 is not provided with openings or through-holes except for openings that are unavoidable due to manufacturing reasons. Therefore, the airflow (hot air) introduced from the blower port 116 flows through the airflow guide portion 17 into the airflow retention space. In this manner, the air blowing port 116 communicates with the outside of the container body 11 via the air blowing guide portion 17 .

The deck 12 is constructed by arranging a plurality of deck veneers 12a. In this embodiment, the deck 12 is composed of four deck veneers 12a . . . arranged in the front-rear direction. A punching plate is used as each deck veneer 12a in this embodiment. However, the present invention is not limited to this, and for example, a combination of a wire mesh and a member for adjusting the aperture ratio (a plate-like member provided with slits, etc.) may be used, and various configurations can be selected.

Next, as shown in FIG. 6, the support plate 13 is fixed to the bottom of the container body 11 together with the sub-support plate 14, and constitutes a frame that supports the deck 12 (a plurality of deck veneers 12a, . . . ) from below. In this embodiment, the sub-support plates 14 are provided in three rows in the front-rear direction.

The support plate 13 is provided between the deck 12 and the bottom surface of the container body 11 . Therefore, the space on the bottom side (below) of the deck 12 in the container body 11, that is, the airflow retention space is partitioned in the width direction. However, this support plate 13 is shorter than the distance between the front side 111 and the rear side 115 of the container body 11 . The portion of the front end of the support plate 13 that does not partition the airflow retention space becomes an air vent 131 (see FIG. 6), which will be described later, by being in an open state. The air-blowing guide portion 17 described above is covered.

The support plate 13 is provided with ventilation holes 131 . The ventilation port 131 communicates the airflow retention space in the width direction with the support plate 13 interposed therebetween. Since the support plate 13 is provided with the ventilation holes 131, the air flow (hot air) for drying the chips can pass through the ventilation holes 131 and move back and forth in the width direction in the air flow retention space partitioned by the support plate 13. .

The advance/retreat means 15 is fixed to the container main body 11, for example, fixed inside the side surface of the container main body 11 (see FIGS. 3 and 4). Specifically, the advance/retreat means 15 is fixed to the corner of the side surface of the container body 11 . The advance/retreat means 15 is fixed inside the rear side surface 115 of the container body 11 . Further, the advancing/retreating means 15 of the present embodiment is fixed to the inner upper part of the side surface (for example, the rear side surface 115) of the container body 11. As shown in FIG.

Further, the advance/retreat means 15 can advance/retreat in the direction in which the bottom surface of the container body 11 widens. The advancing/retreating means 15 of this embodiment is a movable stay. Specifically, the advance/retreat means 15 is a movable stay that is movable at least in the horizontal direction. More specifically, the advance/retreat means 15 is a movable stay that is movable not only in the horizontal direction but also in the vertical direction. The moving direction of the advancing/retreating means 15 may be a horizontal direction, a vertical direction, or a direction oblique to the horizontal or vertical direction.

The advance/retreat means 15 is a movable stay capable of rotating in the horizontal direction around a position fixed to the side surface of the container body 11 as a rotation axis. More specifically, the advancing/retreating means 15 has a ball joint 151 and a stay main body 154 extending from the ball joint 151, as shown in FIGS. The ball joint 151 includes a stud 152 fixed to the rear side surface 115 of the container body 11, and a holder 153 connecting the stud 152 and the stay body 154 and provided with a recess. The ball joint 151 of this embodiment also includes a boot that covers the surface of the holder 153 (not shown).

Stud 152 has a spherical portion and a columnar portion extending from the spherical portion. The columnar portion is fixed to the rear side surface 115 of the container body 11 . The spherical portion is housed in a recess provided in holder 153 . The holder 153 is rotatably connected to the stud 152 in the horizontal direction (the direction in which the bottom surface of the container body 11 widens) (see FIG. 7). The holder 153 is rotatably connected to the stat 152 not only in the horizontal direction but also in the vertical direction (see FIG. 9).

The stay main body 154 has a rod shape, for example, a straight rod shape. As shown in FIGS. 7 and 8 , a base end portion 1540 , which is one end portion in the longitudinal direction of the stay body 154 , is fixed to the holder 153 . A sensor 16 is connected to a tip portion 1541 that is the other end portion of the stay main body 154 in the longitudinal direction. This sensor 16 is a sensor that detects the temperature or humidity inside the container body 11 . A central portion 1542 in the longitudinal direction of the stay body 154 of this embodiment can be fixed to the rear side surface 115 of the container body 11 by a fixing member 155 (see FIG. 3).

With such a configuration, the advancing/retreating means 15 advances/retreats between the advanced attitude and the retracted attitude. The advanced posture is a posture in which the sensor 16 is moved away from the side portion (for example, the rear side surface 115) of the container body 11 (see FIG. 4). The retracted posture is a posture in which the sensor 16 is retracted so as to approach the side portion (for example, the rear side surface 115) of the container body 11 (see FIG. 3). Specifically, as shown in FIG. 7, the advance/retreat means 15 is rotatable between a retracted posture and an advanced posture while drawing an arc around a ball joint 151 .

Further, the advance/retreat means 15 is vertically movable at least in the advanced posture. The advance/retreat means 15 of the present embodiment is vertically movable in both the advanced attitude and the retracted attitude. Specifically, as shown in FIG. 9, the advancing/retreating means 15 is vertically rotatable about a ball joint 151 in an arc.

The stay main body 154 of this embodiment extends along the rear side surface 115 when the advancing/retreating means 15 is in the retracted posture. Further, the stay main body 154 of this embodiment can move from a position extending along the rear side surface 115 to a position extending along the first wide side surface 118 by turning the ball joint 151 .

The sensor 16 is a sensor capable of detecting ambient temperature or humidity, and the illustrated one is a sensor capable of detecting temperature. Further, the sensor 16 is arranged inside the container main body 11 while being connected to the advancing/retreating means 15 . The sensor 16 is arranged on the deck single plate 12a arranged at the rearmost side when the advancing/retreating means 15 is in the advanced posture (see FIG. 4). Note that the sensor 16 includes a sensor main body that detects temperature and a case that houses the sensor main body. The sensor 16 is provided at a position straddling a large number of chips from an airflow retention space that guides the air from the air blower 18 to the large number of chips. Specifically, the chip is arranged above the airflow retention space, and the sensor 16 is arranged above the chip. may be arranged side by side in the horizontal direction.

An example of a procedure for drying chips in the drying container 1 will be described. First, after the advancing/retreating means 15 is retracted to the retracted posture (see FIG. 3), chips are put into the drying container 1 from above. At the time of charging, the chips are generally charged intensively in the central area within the drying container 1 so that the chips do not overflow from the drying container 1 . When all the chips to be dried are put into the drying container 1, the advance/retreat means 15 is advanced to the advance attitude (see FIG. 4). At this time, as shown in FIG. 9, the advance/retreat means 15 of the present embodiment advances so as to be positioned substantially in the center position in the width direction between the pair of wide side surfaces 117 . At this time, the advance/retreat means 15 advances so that the sensor 16 is arranged on the uppermost surface C1 of the laminated structure C in which the chips are stacked in the vertical direction. This causes the sensor 16 to come into contact with the uppermost surface C1. Extending and retreating of the advancing/retreating means 15 can be performed manually or automatically. Here, the sensor 16 is arranged on the uppermost surface C1 of the laminated structure C in which the chips are stacked. The chips are dried starting near the airflow retention space between the bottom of the container and the deck 12 . Therefore, if the uppermost chip far from the airflow retention space is dry, it can be considered that all the chips have been dried. In addition, it is preferable to arrange the sensor 16 near the center of the container because the area near the side wall of the container tends to be dried due to the wind blowing along the wall. In other words, by arranging the sensor 16 at a position where the drying of the material to be dried has progressed sufficiently and the chip (material to be dried) to be finally dried exists, it is possible to accurately detect the completion of drying. can. Therefore, it is possible to accurately detect the timing for stopping the air blowing of the air blower 18 .

When the advance/retreat means 15 advances to the advanced attitude, drying of the chips is started. Specifically, supply of hot air by the airflow supply mechanism 2 is started. The supply of hot air may be started manually, or may be done automatically by detecting the advance of the advancing/retreating means 15, for example. The hot air generated by the airflow supply mechanism 2 is sent into the drying container 1 through the connecting pipe 3, hits the chips through the double bottom structure of the drying container 1, and evaporates the moisture of the chips.

Then, when the sensor 16 detects that the temperature inside the container body 11 has begun to rise, or when a sensor (not shown) detects that the humidity inside the container body 11 has begun to decrease, the control device 19 Control is performed to reduce the amount of air blown by the air blower 18 . Subsequently, drying is performed with a small amount of air, and as described above, the temperature (or humidity) inside the container body 11 accurately detected by the sensor 16 (or humidity sensor) arranged on the uppermost surface C1 of the laminated structure C is increased. , the temperature (or humidity) detected by the air temperature sensor 22 (or the air humidity sensor) is the same, it is determined that the drying is completed, and the control device 19 stops the air blow of the air blower 18 by the first stopping means 20 to complete drying. The air blowing temperature of the air blowing device 18 is set at, for example, 70° C., but can be appropriately changed according to the type of material to be dried, the amount to be dried, the drying finish, and the like. Here, the air blowing volume of the air blower 18 is reduced by one step, but the air blowing volume may be reduced by a plurality of steps as time elapses.

In addition, in the drying container 1 of the present embodiment, the sensor 16 is arranged so as to contact the uppermost surface C1 of the laminated structure C in which the chips are stacked (see FIG. 9), so that the volume of the chips is reduced by drying. Even if the uppermost surface C1 of the laminated structure C descends, the sensor 16 descends following the lowering of the uppermost surface C1 (see FIG. 10), so that the sensor 16 continues to contact the uppermost surface C1. Therefore, the temperature of the uppermost surface C1 of the laminated structure C can be detected continuously, and the detected temperature does not change greatly.

In addition, since the drying container 1 of the present embodiment is provided with the air temperature sensor 22 capable of detecting the temperature of the hot air from the air supply mechanism 2, in addition to the temperature detected by the sensor 16, the temperature detected by the air temperature sensor 22 is Based on the detected temperature, one can predict the length of time it will take to dry the chip from start to finish. For example, if the actual measured temperature detected by the air temperature sensor 22 is much lower than the design temperature of the hot air from the air supply mechanism 2, the chip drying time will be longer than the design time. can be predicted. Conversely, if the temperature detected by the air temperature sensor 22, which is actually measured, is much higher than the design temperature of the hot air from the air supply mechanism 2, the chip drying time will be shorter than the design time. can be predicted.

As mentioned above, although one embodiment was taken up and described about this invention, this invention is not limited to the said embodiment. For example, although the drying container 1 of the above-described embodiment is configured to be mounted on a vehicle, it is not limited to this, and may not be mounted on a vehicle. In this case, the drying container 1 may be of a fixed type that does not move at a fixed position, or may be of a portable type that can be moved as appropriate. In particular, when it is not intended to be mounted on a vehicle, the drying container 1 is not limited to a substantially rectangular parallelepiped shape as in the above embodiment, and can be of various shapes such as a cylindrical shape.

The upper surface of the drying container 1 of the above embodiment was always open. However, it is not limited to this, and it is also possible to provide a lid made of a hard or soft material whose upper surface can be closed if necessary, for example to protect the chip from rain water. Moreover, the drying container 1 is not limited to the double bottom structure having the deck 12 as in the above embodiment, and the drying container 1 may be ventilated by various structures. If there is no deck 12 (no double bottom structure), the blower port corresponds to the airflow retention space.

The air outlet 116 of the above embodiment was provided on the rear side surface 115 of the container body 11 . However, the present invention is not limited to this, and the air outlets 116 can also be provided on the widthwise side surfaces, the bottom surface, and the corners of the container body 11 .

In the above embodiment, the air temperature sensor 22 capable of detecting the temperature of the hot air from the air supply mechanism 2 is provided, but the air temperature sensor 22 may be omitted. The same applies to humidity sensors. In this case, a preset set temperature (or set humidity) is input to the control device 19, and as shown in FIG. The control device 19 is provided with the second stopping means 21 for stopping the air blowing of the air blower 18 when the temperature (or the set humidity) and the same temperature (or the same humidity) are reached. Also, the set temperature (or set humidity) may be the same as the temperature (or humidity) of the hot air blown from the airflow supply mechanism 2, or may be a different temperature (or humidity).

In addition, although the material to be dried in the drying container system S is wood chips in the above-described embodiment, it is not limited to this. etc., can be made into various granules.

Note that the control device 19 need not be fixed to the container body 11 and may be fixed to the airflow supply mechanism 2 including the air blower 18 . Even in this case, it is necessary to connect the sensor 16 in the container body 11 and the control device 19 by wiring.

Further, based on the temperature detected by the air temperature sensor 22, a set temperature lower than the temperature of the air blown from the air blower 18 is set, and after the sensor 16 detects that the temperature inside the container body 11 has reached the set temperature, The air blower 18 may be stopped after a predetermined period of time has elapsed. By stopping the blower 18 on the assumption that the blower temperature has reached the set temperature after a predetermined time has passed, the temperature detected by each sensor becomes uneven (for example, depending on the detection accuracy of the sensor), and the air is sufficiently dry. However, the temperature detected by the sensor 16 in the container body 11 does not reach the temperature detected by the air temperature sensor 22 and the air blower 18 does not stop, or the temperature detected in the container body 11 is higher than the air blow detection temperature even though the drying is insufficient. It is possible to prevent the air blower 18 from stopping due to reaching the

REFERENCE SIGNS LIST 1 drying container 2 airflow supply mechanism 3 connecting pipe 11 container body 110 narrow side surface 111 front side surface 112 hook engaging portion 113 roller 114 leg portion 115 Rear side 116 Blower port 117 Wide side 118 First wide side 119 Second wide side 1151 Door 12 Deck 12a Deck veneer 121 Through hole 13 Support Plate 131 Ventilation port 14 Sub-support plate 15 Retraction means 151 Ball joint 152 Stud 153 Holder 154 Stay body 155 Fixed member 1540 Base end 1541 Tip Part 1542... Central part 16... Sensor 17... Air blow guide part 18... Air blower 19... Control device 20... Stop means 21... Stop means 22... Air temperature sensor 23... Control means C... Laminate structure, C1...top surface, S...drying container system, T1-T4...timing time

Claims (6)

A box-shaped container body provided with an air blowing port for blowing air into the inside for drying a large number of objects to be dried having moisture, an air blower for blowing air into the air blowing port of the container body, and the container body. A sensor that detects the temperature or humidity inside, and a control device that controls the blower based on the detected value from the sensor,
When the sensor detects that the temperature inside the container body has begun to rise, or when the sensor detects that the humidity inside the container body has begun to decrease, control to reduce the blowing volume of the blower. A ventilation control system for a drying container, wherein the control device is provided with control means for performing The sensor detects the temperature or humidity in the container body at the beginning of air blowing by the air blower, and a temperature set value higher than the temperature detected by the sensor or a humidity set value lower than the humidity detected by the sensor. and the control means performs control to reduce the air blowing volume of the blower when the temperature setting value or the humidity setting value set by the setting means is reached. A ventilation control system for a drying container according to claim 1. The control device obtains a change rate of temperature rise per unit time or a change rate of humidity fall per unit time based on the temperature or humidity inside the container body detected by the sensor, and the control means 2. The drying method according to claim 1, wherein when the rate of change becomes larger than the rate of change obtained when the air blower starts blowing air, control is performed to reduce the amount of air blown by the air blower. Container ventilation control system. An air temperature sensor for detecting the temperature of the air blown from the air blower is provided, and when the temperature detected by the sensor for detecting the temperature inside the container body becomes the same as the temperature detected by the air temperature sensor, the air blown 4. The air blowing control system for a drying container according to claim 1, wherein said control device is provided with first stopping means for stopping the air blowing of the device. When the sensor detects that the temperature in the container body has reached a preset set temperature or that the humidity in the container body has reached a preset set humidity, the air blowing 4. The air blowing control system for a drying container according to claim 1, wherein said control device is provided with a second stopping means for stopping the air blowing of the device. The container main body is provided with an airflow retention space for guiding the air from the air blower to the multiple items to be dried, and the sensor is arranged at a position straddling the multiple items to be dried from the airflow retention space. The air blow control system for a drying container according to any one of claims 1 to 5, characterized in that

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