JP4066841B2 - Grain dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grain detection device that detects the presence or absence of a dried grain of a grain dryer. It can be effectively used in a circulation type dryer that circulates and conveys grains and applies hot air to dry the grains.
[0002]
[Prior art]
A grain dryer completion detection method for a grain dryer is known in which the moisture meter does not measure the moisture in the normal range of the grain so that the grain is completely discharged from the drying box (see, for example, Patent Document 1). ).
[0003]
[Patent Document 1]
Japanese Examined Patent Publication No. 5-26115 (first page, FIG. 1).
[0004]
[Problems to be solved]
In the embodiment in which the flow of the dry conveyance of the dried grains is detected by the moisture meter, the drying control is easily influenced by whether or not the moisture meter can detect moisture. That is, if the moisture meter is erroneously detected, overdrying or drying efficiency is often reduced. Therefore, when an abnormality occurs in the output of the moisture meter, measures such as interrupting the drying operation are taken immediately.
[0005]
At this time, since the moisture meter is stopped, it is impossible to detect the presence or absence of a grain flow.
[0006]
[Means for Solving the Problems]
In view of the above-described drawbacks, the present invention is intended to continue detection of the presence or absence of a grain flow by a moisture meter, and has taken the following technical means.
That is, the invention according to claim 1 is configured to repeat the circulation until the predetermined moisture value is reached while reducing the grain that has passed through the drying chamber 2 to the storage chamber 1 and tempering the grain circulation path. A moisture meter 31 is provided in the middle of which the moisture value of the grain can be detected by taking a part of the circulating grain into the electrode rolls (57, 58) and the presence or absence of the grain flow can be detected. In the grain dryer, when the lock of the electrode roll (57, 58) is detected, the measurement of the moisture value of the grain is stopped and the circulation of the grain is stopped. The electrode roll (57, 58) ) Or when the moisture measurement time for the preset number of kernels exceeds the preset time, the measurement of the moisture value of the kernel is stopped and the circulation of the kernel is performed. And the detection of the presence or absence of grain flow. And the configuration of the grain dryer to.
[ 0007 ]
[ 0008 ]
[0009]
【The invention's effect】
According to the first aspect of the present invention, when the moisture meter 31 during the grain drying operation is abnormal, the moisture measurement of the grain is stopped. However, when the lock of the electrode roll (57, 58) is detected, the grain is stopped. The measurement of the moisture value of the grain is stopped and the circulation of the grain is stopped, and when the abnormality of the temperature of the electrode roll (57, 58) is detected, or the moisture measurement time of the preset grain number When the time set in advance is exceeded, the measurement of the moisture content of the kernel is stopped, and the detection of the presence or absence of the circulation of the kernel and the flow of the kernel is continuously performed. Even if there is an abnormality in the measurement, if there is no effect on the grain circulation check or the automatic discharge stop judgment, the function of the grain flow sensor can be effectively performed by continuing the process, and the safety of drying and Work operability can be improved .
[ 0010 ]
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. First, based on FIGS. 1-11, a grain dryer selectively comprises the hot-air dryer and far-infrared dryer from which the drying form differs mainly by the dryer basket 4. This dryer basket 4 has a rectangular box shape, and has a storage chamber 1 that accommodates and tempered grains that are stretched on the upper part, and a heating air that flows down the stored grains on the lower side. There is a drying chamber 2 for ventilating and drying, and on the lower side there is a cereal collection chamber 3 that receives and feeds down the grain fed from the drying chamber 2. The dryer basket 4 is stacked in a plurality of stages as blocks of the machine cabinets 4H, 4M, and 4L for each height of the storage chamber 1, the drying chamber 2, and the cereal collection chamber 3 over the entire height. It is configured to be assembled.
[0012]
This storage chamber 1 is for storing grains for drying, which are grained by a bucket conveyor 19 provided near one side outside the front surface of the dryer basket 4, and in the upper part, grains supplied from the bucket conveyor 19 A supply auger 20 that conveys the particles and a diffusion plate 21 that diffuses while receiving and receiving the grains conveyed by the supply auger 20 are provided. The lower end of the storage chamber 1 communicates with the upper side of the branch plate portion having a cross-sectional shape of the drying chamber 2 so that the grains to be stored can branch and flow down to each drying chamber 2.
[0013]
This drying chamber 2 is a perforated plate-shaped perforated plate on both the left and right sides, has a ventilation surface 12 and is inclined with a constant left and right width, and is substantially W-shaped in front view across the upper and lower sides of the machine 4M. Composed. A feeding valve 22 is provided at the lower end of each drying chamber 2, and the grains in the drying chamber 2 and the storage chamber 1 can be fed to the lower cereal collection chamber 3 by the rotation of the feeding valve 22. it can. The ventilation surface 12 of each of the drying chambers 2 is exposed to the lower cereal collection chamber 3 so that hot air is passed from the cereal collection chamber 3 side into the drying chamber 2. Further, an exhaust suction chamber 23 is formed on the upper side of the ventilation surface 12 between the upper storage chamber 1 and the suction air pressure of the exhaust fan 8 mounted on the back wall 9 side of the suction chamber 23 can be applied. it can. For this reason, the hot air sucked from the cereal collection chamber 3 is ventilated so as to cross the ventilation surface 12 and the drying chamber 2 and sucked and exhausted to the suction chamber 23.
[0014]
The lower end portion of the drying chamber 2 and the feeding valve 22 portion protrude downward from the lower edge of the machine cabinet 4M section of the drying chamber 2 and are fitted into the machine cabinet 4L of the grain collecting chamber 3 section. It is configured.
The grain collection room 3 is provided across the width of the machine 4L on the lower side of the drying room 2, and a grain collection board 24 that is inclined in a substantially V shape in front view is provided at the bottom. A feeding valve 22 is approached on the left and right grain collecting plates 24, and a grain collecting auger 25 extending in the front-rear direction is provided at the lower end portion, receiving the grains fed from these feeding valves 22 and flowing down, The cereal is collected in the cereal collecting auger 25. The grains that are collected and conveyed through the cereal collection auger 25 are supplied to the lower end of the bucket conveyor 19 and can be reduced into the storage chamber 1. The grain collection chamber 3 is partitioned and formed with the feeding valve 22 as a boundary, the central portion of the machine 4L width as the central chamber portion 3A, and the left and right outer sides as the side chamber portions 3B.
[0015]
The front wall 7 and the back wall 9 of the drying machine 4 are formed to have a predetermined width or outline by a sheet metal material, and are attached to the front and back sides of the machine 4M and 4L block parts. The opening 10 formed in the front wall 7 and the back wall 9, the duct 11 to be attached, and the like differ depending on the specification form of the dryer. Here, in the hot air dryer (see FIG. 11), an opening duct port 27 is formed at the front end of each central chamber portion 3A as an opening 10 portion in the front wall 7, and an opening duct port 28 is formed in the side chamber portion 3B. It is formed. Further, as the duct 11, a burner duct 26 communicating with the duct ports 27 and 28 is attached to the front side of the front wall 7. The burner 6 is communicated with the front side of the burner duct 26, and hot air burned and heated by the burner 6 is guided by the burner duct 26 and branched and sucked from the duct ports 27 and 28 to the central chamber portion 3A, the side chamber portion 3B, and the like. . Further, an opening 10 is formed in the back wall 9 as an opening 10 at the rear end of each suction chamber 23, and a duct 11 is connected to the rear side of the back wall 9 and communicates between the duct ports 29 as exhaust air. A duct 30 is attached. The exhaust duct 30 communicates with the suction exhaust fan 8 on the rear side, and when the exhaust fan 8 is driven, a suction wind pressure is exerted in the suction chamber 23 via the exhaust duct 30 and the duct port 29 and the like. The hot air heated by the side can be flowed from the grain collection room 3 to the suction room 23 through the drying room 2, and the grain in this drying room 2 or the grain collection room 3 can be heated and dried. Since the exhaust duct 30 is provided opposite to the rear side of the higher suction chamber 23, it is attached to the back wall 9 of the machine 4M block. The front and rear walls 7 and 9 of the upper and lower machines 4M and 4L are mounted as separate wall plate configurations, but may be configured as a single upper and lower wall plate configuration. it can.
[0016]
In the far-infrared dryer (see FIG. 7), the front walls 7 and the back wall 9 are provided with openings 10 as openings 10 for mounting the far-infrared radiation device 5 so as to face the central chamber 3A. The burner 6 is arranged on the front side of the front wall 7 and is configured to irradiate far-infrared rays on the grains flowing down on the grain collecting plate 24. A burner cover 32 covering the burner 6 is attached, and outside air such as combustion air for the burner 6 is sucked from an intake port 33 formed in the burner cover 32. Further, the exhaust wall 8 and the exhaust duct 30 are attached to the rear wall 9 in the same manner as the hot air dryer, and the duct port 35 of the central chamber portion 3A and the ducts of the left and right side chamber portions 3B are disposed below the rear wall 9. The far red bypass duct 18 communicates with the mouth 36. The outside air port 16 is formed in a form in which the duct port 36 is expanded more than the communication port portion of the bypass duct 18. The outside air port 16 is provided with an intake damper so that the amount of outside air can be adjusted.
[0017]
The front wall 7 and the back wall 9 before and after are formed with large attachment ports 37 and 38 as the opening 10 so as to face the central chamber portion 3A, and the far-infrared radiation device 5 as a unit is attached to these attachment ports 37. , 38 can be fitted inwardly. This far-infrared radiation device 5 is mainly composed of a far-infrared radiation cylinder 40 formed in a rectangular tube shape with a rectangular cross section, and is set to a longitudinal length extending between the front wall 7 and the back wall 9. Inside the far-infrared radiation tube 40, a guide plate 41 that is inclined downward from the front upper side to the rear lower side is provided. The far-infrared radiation tube 40 has a bottom portion 42, left and right side portions 43, and an upper guide plate. A hot air cylinder 45 is formed between the air heater 41 and the heated air by the flame from the burner 6 and guided to the outlet 44 on the back wall 9 side. The lateral width of the guide plate 41 is made narrower than the width of the far-infrared radiation tube 40, and appropriate spacing portions 46 are formed between the left and right side edges of the guide plate 41 and the side portions 43. The hot air duct 45 is formed so as to be gradually lower in the rear direction in which the hot air flows, and a baffle plate 47 that alternately protrudes from the bottom 42 side and the guide plate 41 side is disposed in the hot air duct 45. Is guided to flow in a vertical wave shape.
[0018]
A cylindrical flame cover 39 is provided in the front end portion of the far-infrared radiation cylinder 40 so as to surround the flame that is ejected from the burner 6. Further, an intake cylinder 53 is formed on the upper side of the guide plate 41, and sucks outside air from the front outside air port 34 and guides it to the hot air chamber 51 on the upper side of the outlet 44 on the rear side. The hot air chamber 51 is formed by the intake cylinder 53 and the guide plate 41, the left and right side wall portions 48, the upper dustproof plate 13, the rear rear wall portion 50, and the like. The hot air flowing into the hot air chamber 51 through the outlet 44 of the hot air cylinder 45 is taken out from the outside air port 34 through the intake cylinder 53 into the hot air chamber 51 and the outside air port formed in the rear wall 50. 55 is mixed with the outside air sucked into the hot air chamber 51 from the inside. The hot air mixed with the outside air in the hot air chamber 51 is sent to the central chamber portion 3A from the exhaust port 52 formed between the upper dustproof plate 13 and the bypass duct 18 from the duct port 35 of the rear wall portion 50. And sent to the side chamber 3B. This far-infrared radiation device 5 has a roof-shaped dustproof plate 13 on the upper side, and receives dust that leaks through the ventilation surface 12 on the upper side of the drying chamber 2 so as not to fall into the far-infrared radiation cylinder 40. Thus, the far-infrared effect of heating the hot air by the radiant heat from the far-infrared radiation tube 40 is configured to be lowered onto the grain collecting plate 24 through the left and right outer portions of the far-infrared radiation tube 40. . The dust-proof plate 13 can be attached to the front wall 7 and the back wall 9 at the front and rear ends.
[0019]
The far-infrared radiation cylinder 40 is heated to an appropriate temperature range of about 300 ° C. to 400 ° C. when the combustion hot air from the burner 6 is passed through the hot air cylinder 45 as described above, and dries the grains. It is configured to emit far infrared rays in the optimum state. For this reason, if the heating temperature is too low beyond the appropriate temperature range, the far-red effect due to the far-infrared radiation is reduced, and if it is overheated, the burner fuel is wasted and there is a risk. For this reason, the hot air temperature in the hot wind tube 45 for maintaining the far-red effect by the far-infrared radiation device 5 high, or the hot air chamber for sending the hot air subjected to the far-red effect to the drying chamber 2 to dry the grain Since the hot air temperature etc. in 51 differ in an appropriate temperature range, respectively, these can be adjusted and controlled to the appropriate temperature in each part by the external air suction mixing from 10 parts of each said opening.
[0020]
At the opening 10 portion of the front wall 7 and the back wall 9, the attachment port 37 for the burner 6, the intake port 34 of the intake cylinder 53, the outside air port 55 of the attachment port 38 where the bypass duct 18 intervenes, and the outside air port 16 and the like are each provided with an intake damper (not shown) that can adjust the intake amount of outside air.
[0021]
The grain dryer is provided with a supply hopper 17 for supplying grains to the lower part of the bucket conveyor 19. The moisture meter 31 is attached to the side of the bucket conveyor 19, receives the grains leaking from the bucket 56 of the bucket conveyor 19, holds the grains by the rotation of the pair of electrode rolls 57, 58 and crushes them. While detecting the electrical resistance value, the moisture content of the grain is detected. On the upper side of the electrode rolls 57 and 58, a hopper 59 that receives the grains leaking from the bucket 56, and a grain guided from the hopper 59 are laterally fed and fed between the electrode rolls 57 and 58. It has a spiral 60, a guide plate 61, etc., and drives the intake spiral 60, electrode rolls 57, 58, etc. with a motor shaft 62, so that moisture can be taken in while taking the grains circulated through the dryer one by one. Can be detected. The crushed grains after the moisture detection is reduced into the bucket conveyor 19.
[0022]
The drying control device of this dryer is a dry switch 53 that does not burn the burner 6 and does not burn the burner 6 on the input side of the controller 54 (FIG. 1). A ventilation switch 64 for burning, a drying switch 65 for burning the burner 6 and drying hot air by driving the exhaust fan 8, and the like, a discharge switch 66 for discharging the dried grain outside the dryer, and a stop switch for stopping the drying operation 67 and an extension amount setting switch 68 for setting an extension amount for inserting a grain to be dried in the drying chamber. Furthermore, it has the moisture meter 31 which shares a grain flow detection, and each sensor 69,70 etc. which detect a hot air temperature, exhaust air temperature, etc. On the output side, the motors such as the supply auger 20, the grain auger 25, the bucket conveyor 19 and the feeding valve 22, the motor of the exhaust fan 8, the combustion system output of the burner 6, and the display, etc. A display unit 71 and the like are included.
[0023]
Here, the moisture meter 31 receives a predetermined signal from the bucket conveyor 19 that is being circulated and conveyed by a start signal that is intermittently output at regular intervals by turning on the switches 64, 65, and 66 in the ventilation, drying, and discharge modes. The number of grains is inserted and moisture is detected. When this detection value is processed to obtain the moisture value of the grain, this allows the monitoring of the air circulation, temperature, time, and further, circulation monitoring, determination, and treatment such as detection of defective circulation of the grain and detection of automatic stop of discharge. Etc. That is, the electrical resistance value of the grain crushed between the electrode rolls 57 and 57 is inputted and converted into a predetermined moisture value. It is the structure which can determine with the presence or absence whether the grain is in a circulation state in the transport circulation system, that is, the presence or absence of the circulating grain.
[0024]
In each of the control modes (FIGS. 2 to 4), when an abnormality occurs in the moisture meter 31, the moisture detection action is immediately stopped, and at the same time, it is determined what the abnormality is. When this abnormality is a temperature abnormality of the electrode rolls 57 and 58 or when the moisture measurement time is exceeded, the moisture meter 31 cannot accurately detect moisture, but if it can detect poor circulation of the grain, Continue detection of defective grain circulation even in the drying and ventilation modes. Further, even in the automatic discharge stop in the discharge mode, the discharge is continued when the temperature of the electrode rolls 57, 58 is abnormal. The detection of the lock of the electrode roll is based on the rotation stop output of the rotation sensor provided on the electrode roll during the output of the moisture measurement signal. The excess detection of the moisture measurement time is performed by comparison with a set time of a time required for a preset number of grains. Also, in the case of an electrode temperature abnormality, it can be performed by a combination with a sensor attached in the vicinity of the electrode.
[0025]
In addition, when foreign matter such as straw scraps and stones clogs between the take-in spiral 60 and between the electrode rolls 57, 58, etc., or when the circulation flow of the grains cannot be detected, or whether the measurement voltage is abnormal and the grains Is uncertain, the operation of the burner 6 and the like is stopped for a predetermined time in the drying mode. In this case, the stop time is long, for example, about 4 minutes in the normal hot air dryer, but longer about 20 minutes in the far infrared dryer.
[0026]
Thus, even if there is an abnormality in the grain moisture measurement, if it does not affect the grain circulation check or the automatic discharge stop judgment, the function of the grain flow sensor can be effectively performed by continuing the process. Drying safety and work operability can be improved.
[0027]
Next, differences from the above example will be described mainly based on FIG. In the moisture meter 31, it can be seen from the appearance that the electrode rollers 57 and 58 are rotating. However, it is difficult to determine whether or not the grains taken in by the electrode rollers 57 and 58 are being crushed during the moisture measurement. Therefore, during automatic or manual moisture measurement by external input or internal settings in the controller 54, in addition to the normal moisture value display, the count value of the number of moisture measurement grains and the moisture peak voltage value for each grain. The water measurement related data such as the above can be displayed on the display unit 71. Thereby, since a moisture measurement grain number count value can be displayed, confirmation of sample measurement time becomes easy. Further, since the moisture peak voltage can be displayed, it is easy to check the variation of the sample moisture. This facilitates inspection and confirmation regarding the moisture meter 31 in the market, adjustment of the belt tension of the bucket conveyor 19, and the like.
[0028]
Next, differences from the above example will be described mainly based on FIG. When the grain is put into the dryer, since straw dust and dust are likely to stay between the grain auger 25 and the bucket conveyor 19, the straw dust is conveyed all at once at the start of drying. The supply auger 20 may become clogged. For this reason, in the moisture meter control in which the moisture meter 31 is intermittently operated at the time of stretching (mode) as described above, the grain flow is detected during the intermittent operation, and it is determined that the grain does not enter the moisture meter 31. In this case, the feeding valve 22 is configured to operate for a predetermined time from a state in which the feeding valve 22 is stopped when being stretched. Since it is rare that the grain is continuously stretched until the storage chamber 1 is filled, the straw scraps are conveyed little by little during the time when the tension is interrupted, and the grain auger The straw scraps and the like at 25 are less likely to remain, and clogging at the start of drying can be prevented.
[0029]
In the time chart of FIG. 13, the intermittent operation of the moisture meter 31 at the time of tension is, for example, a period of 2 minutes, and the electrode rolls 57 and 58 are rotated in reverse rotation 20 to 30 seconds and forward rotation 10 to 20 seconds in total 30 to 50 The flow of the grain is detected by operating for 2 seconds, and when the detection of the grain is not performed twice in succession, the feeding valve 22 is driven for several seconds.
[0030]
Next, differences from the above example will be mainly described with reference to FIG. In the form in which the circulation of the grains is intermittently performed by intermittent rotation of the feeding valve 22 during the drying of the grains, the circulation of the grains is temporarily interrupted, so that the moisture measurement time is longer than that during the continuous circulation. Easy to be. Therefore, the moisture measurement time is shortened by changing the circulation until the end of the measurement continuously during the moisture measurement. The operation of the feeding valve 22 is switched from intermittent rotation to continuous rotation, or is switched from a normal rotation speed to a higher rotation speed so as to promote grain uptake into the moisture meter 31. In particular, the switching to the continuous rotation can be configured so as to be switched when the dry finishing moisture (about 16%) is approached. Further, for such a switching operation, an external switch for manual operation can be provided and can be arbitrarily changed. Since the feed amount of the feed valve 22 is increased for about 2 to 3 minutes at the time of moisture measurement, there is no influence on the drying and conveying capacity of the bucket conveyor 19 and the moisture measurement can be performed in an appropriate time and stopped. Accuracy can be stabilized.
[0031]
Further, in such rotation of the feeding valve 22, it is determined whether or not the predetermined number of grains can be ensured within a preset time, and when the predetermined number of grains cannot be secured, switching is made to increase the feeding amount. It can also comprise.
Next, points different from the above example will be described mainly based on FIGS. In the moisture measurement by the moisture meter 31, the range of the upper and lower limit cuts is varied depending on the level of the moisture value, and the effective range is widened in a high moisture region and the effective range is reduced in a low moisture region.
[0032]
Although there is a treatment mode in which the upper and lower cut areas of the low moisture region are reduced, the calculated average moisture value becomes high, and the moisture corresponding to the sizing tends to be overdried.
For this reason, when the moisture value of many grains is detected by the single moisture meter 31 and the moisture value at the time of measurement is calculated by a calculation process that cuts high moisture grains and low moisture grains by upper and lower limit treatments, The upper and lower cut areas are made smaller (increase the effective range), and the lower moisture area (moisture near the stop) is made larger (the effective range is made smaller). The upper limit moisture and the lower limit moisture are determined on the basis of a simple average value (or median value) of a certain number of grains at the time of one measurement, and the average moisture is calculated for the grains within the effective range. At this time, the measured moisture value or the moisture value up to the stop set moisture value distinguishes the upper limit and the lower limit moisture.
[0033]
With such a configuration, the high moisture region reduces the cut region and calculates the average moisture including high moisture grains such as blue rice, thereby suppressing the average moisture from being lowered, and the low moisture region increases the cut region. However, by removing some of the high moisture particles, the average moisture can be brought close to the sizing, and over-drying of the sizing can be prevented.
[0034]
Next, differences from the above example will be described mainly based on FIG. In the moisture measuring apparatus, the range of the upper and lower limit cuts is varied depending on the level of the moisture value, and the effective range is widened in a high moisture region, and the effective range is reduced in a low moisture region.
Usually, the upper and lower limit processing of the calculated moisture value is a simple average value ± 10%. However, the upper limit of 10% has a wide range, and the average moisture becomes high correspondingly, which causes overdrying. In addition, the moisture distribution is becoming narrow near the moisture stop, and by reducing the upper and lower limit range, the moisture detection accuracy can be improved and the risk of overdrying can be prevented.
[0035]
Therefore, the upper and lower limit processing of the moisture average calculation is processed by the median value and deviation of the moisture distribution, and the method of determining the upper and lower limit range is changed by the median value or the moisture measurement interval.
The level of the moisture value was caused by changing the preset moisture measurement interval. As an example of this change, when the moisture measurement interval is 30 minutes, the average processing is performed in the range of (median value−2σ) to (median value + 3σ). To do. When the moisture measurement interval is 10 minutes, the average processing is performed in the range of (median value−1.2σ) to (median value + 2σ). Here, the moisture measurement interval is 10 minutes because of moisture setting + 1.5% ≧ moisture measurement value.
[0036]
In this way, by changing the upper and lower limit processing in the moisture average calculation before and after the moisture stop, it is possible to improve overdrying prevention and moisture detection accuracy.
Next, the difference from the above example mainly based on FIG. 19 and FIG. 20 is that the variation of the measured value of the moisture meter 31 is determined by the difference between the simple average and the median moisture.
[0037]
In general, when deviation is used for determination of moisture variation, calculation processing is complicated and a large memory capacity is required. In addition, if the moisture variation is large, the calculated moisture value is delayed in the vicinity of the stop moisture, and there is a risk of overdrying.
Therefore, when detecting the moisture value of many grains with a single moisture meter and calculating the moisture value at the time of measurement by calculation processing, if the simple average value of a certain number of grains is more than a certain distance from the median moisture value, It is determined that the water content variation is large, and the water stopping process is distinguished from the normal case.
[0038]
A simple average value and a median value of a certain number of grains at the time of one measurement are obtained, and moisture variation is determined by the difference. When moisture variation is large, overdrying prevention processing is performed. For example, it is possible to perform processing such as setting the previous moisture value to be the previous moisture value, reducing the number of stop determinations, or stopping in time.
[0039]
In this way, it is possible to easily determine the magnitude of the moisture variation, and it is possible to make the moisture value at the time of stopping appropriate by the stop process corresponding to the variation.
[Brief description of the drawings]
FIG. 1 is a block diagram of grain drying control.
FIG. 2 is a flowchart of the ventilation mode control.
FIG. 3 is a flowchart of the drying mode control.
FIG. 4 is a flowchart of the discharge mode control.
FIG. 5 is a side view of the moisture meter unit.
FIG. 6 is a side view of the whole grain dryer.
FIG. 7 is a plan view of a part thereof.
FIG. 8 is a rear view of a part thereof.
FIG. 9 is a perspective view of a part of the far-infrared radiation device.
FIG. 10 is a partial cross-sectional view thereof.
FIG. 11 is a plan view of a hot air dryer.
FIG. 12 is a flowchart of moisture meter control showing a partially different embodiment.
FIG. 13 is a time chart of moisture meter control showing a partially different embodiment.
FIG. 14 is a time chart of moisture meter control showing a partially different embodiment.
FIG. 15 is a block diagram of moisture meter control showing a partially different embodiment.
FIG. 16 is a flowchart of the moisture meter control.
FIG. 17 is a distribution graph of the moisture detection.
FIG. 18 is a moisture meter control flowchart and a moisture value distribution graph showing a partially different embodiment.
FIG. 19 is a flowchart of moisture meter control showing a partially different embodiment.
FIG. 20 is a distribution graph of the moisture detection.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage chamber 2 Drying chamber 6 Burner 8 Ventilator 19 Bucket conveyor 22 Feed valve 31 Moisture meter 54 Controller 57 Electrode roll 58 Electrode roll 60 Take-in spiral

Claims (1)

The grain passing through the drying chamber 2 is reduced to the storage chamber 1 while being tempered, and the circulation is repeated until a predetermined moisture value is reached, and a part of the circulating kernel is in the middle of the grain circulation path. In a grain dryer provided with a moisture meter 31 that can detect the moisture value of the grain by taking it into the electrode rolls (57, 58) or detect the presence or absence of the flow of the grain,
When the lock of the electrode roll (57, 58) is detected, the measurement of the moisture value of the grain is stopped, and the circulation of the grain is stopped.
When detecting an abnormality in the temperature of the electrode rolls (57, 58) or when the moisture measurement time for the number of grains set in advance exceeds a preset time, measurement of the moisture value of the grain is stopped. In addition, the grain dryer is characterized by continuously detecting the circulation of the grain and the presence or absence of the grain flow .

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