JPH0789023B2 - Grain dryer stop moisture correction device - Google Patents
Grain dryer stop moisture correction deviceInfo
- Publication number
- JPH0789023B2 JPH0789023B2 JP62315374A JP31537487A JPH0789023B2 JP H0789023 B2 JPH0789023 B2 JP H0789023B2 JP 62315374 A JP62315374 A JP 62315374A JP 31537487 A JP31537487 A JP 31537487A JP H0789023 B2 JPH0789023 B2 JP H0789023B2
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- drying
- stopped
- burner
- moisture value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、熱風で穀物を乾燥する穀物乾燥機の改良に関
する。TECHNICAL FIELD The present invention relates to an improvement of a grain dryer that dries grains with hot air.
(従来の技術) この種の穀物乾燥機としては、乾燥中に穀物の水分を水
分計で測定し、この測定水分値があらかじめ設定してあ
る停止水分値に一致したときに乾燥を自動的に停止する
ようにしたものが知られている。(Prior Art) This type of grain dryer measures moisture of grain with a moisture meter during drying, and automatically dries when the measured moisture value matches a preset stop moisture value. It is known that it was stopped.
(発明が解決しようとする問題点) しかし、乾燥終了直後に穀物の水分が停止水分値どおり
であっても、そのときの外気湿度などの環境条件や未熟
米の混入率によって停止水分値よりも上回って水分が戻
る場合がある。従って、例えば乾燥終了時の水分値が15
%であっても、所定時間経過後に16%に戻って落ち着い
てしまうという問題があった。(Problems to be solved by the invention) However, even if the water content of the grain is equal to the water content value at the end immediately after the completion of drying, the water content value may be lower than the water content value at the time of stoppage due to environmental conditions such as outside air humidity and the mixing ratio of unripe rice. Moisture may return above that. Therefore, for example, the moisture value at the end of drying is 15
Even if it was%, there was a problem that it returned to 16% and calmed down after a predetermined time.
そこで、本発明の目的は、環境条件や未熟米の混入米に
かかわらず穀物を所望の水分値に仕上げることができる
ようにし、もって仕上水分の精度の向上を図ることがで
きる装置を提供することにある。Therefore, an object of the present invention is to provide a device capable of finishing a grain to a desired moisture value regardless of environmental conditions and rice mixed with immature rice, thereby improving accuracy of finishing moisture. It is in.
(問題点を解決するための手段) かかる目的を達成するために、本発明は以下のような構
成とした。(Means for Solving Problems) In order to achieve this object, the present invention has the following configuration.
すなわち、本発明は、バーナ10からの熱風で乾燥する穀
物の水分を水分計20で測定し、その測定水分値が停止水
分値設定手段Aで設定してある停止水分値に一致すると
きに、バーナ10の燃焼を停止して乾燥を終了する乾燥終
了制御手段Bを有する穀物乾燥機において、 乾燥途中の所定のタイミングで前記バーナ10の燃焼を停
止して休止乾燥を行い、所定時間経過後にバーナ10を再
燃焼させる休止乾燥制御手段Cと、 その休止乾燥制御手段Cによる休止乾燥の開始時および
終了時に水分計20の各測定水分値を読み込み、その両測
定水分値から水分の戻りを検出する戻り検出手段Dと、 その戻りに応じて前記停止水分値設定手段Aで設定して
ある停止水分値を補正する停止水分値補正手段Eとを設
けてなる停止水分補正装置。That is, in the present invention, the moisture content of the grain dried by the hot air from the burner 10 is measured by the moisture meter 20, and when the measured moisture value matches the stopped moisture value set by the stopped moisture value setting means A, In a grain dryer having a drying end control means B for stopping the burning of the burner 10 and ending the drying, the burning of the burner 10 is stopped at a predetermined timing during the drying to perform pause drying, and after a predetermined time elapses, the burner is dried. A pause drying control means C for reburning 10 and each moisture content value measured by the moisture meter 20 at the start and end of the pause drying by the pause drying control means C, and the return of moisture content is detected from the both measured moisture content values. A stopped water content correction device comprising return detection means D and stopped water value correction means E for correcting the stopped water value set by the stopped water value setting means A in response to the return.
(作用) まず、乾燥に先立って操作者が停止水分値設定手段Aで
停止水分値を設定しておく。(Operation) First, prior to drying, the operator sets the stop moisture value with the stop moisture value setting means A.
そして、バーナ10が点火されて乾燥が開始され、その開
始から所定時間経過後の所定のタイミングで、休止乾燥
制御手段Cが、バーナ10の燃焼を停止して休止乾燥を行
い、所定時間経過後にバーナ10を再燃焼させる。Then, the burner 10 is ignited to start drying, and at a predetermined timing after a lapse of a predetermined time from the start, the pause drying control means C stops combustion of the burner 10 to perform pause drying, and after a lapse of a predetermined time. Reburn burner 10.
この休止乾燥の開始時および終了時に、戻り検出手段D
は、水分計20の各測定水分値を読み込み、その両測定水
分値から水分の戻りを検出する。At the start and end of this pause drying, the return detection means D
Reads each measured moisture value of the moisture meter 20 and detects the return of moisture from both measured moisture values.
この検出した戻りに応じて、停止水分値補正手段Eは、
停止水分値設定手段Aで設定してある停止水分値を補正
する。In response to the detected return, the stopped moisture value correction means E
The stop moisture value set by the stop moisture value setting means A is corrected.
そして、この補正値に水分計20の測定水分値が一致する
まで乾燥を行い、一致したときにバーナ10の燃焼を停止
して乾燥を終了する。Then, the drying is performed until the measured moisture value of the moisture meter 20 matches this corrected value, and when the measured moisture value matches, the combustion of the burner 10 is stopped and the drying is completed.
従って、乾燥終了後に水分の戻りを利用して停止水分値
に落ち着かせることができる。Therefore, it is possible to settle down to the stopped moisture value by utilizing the return of moisture after the completion of drying.
(実施例) 以下、図面を参照して本発明の実施例を説明する。Embodiments Embodiments of the present invention will be described below with reference to the drawings.
第2図は本発明を実施した穀物乾燥機の概略断面図であ
る。図において、1は乾燥機の貯留室であり、その下部
に2対の流穀板2を下方に行くに従い間隔が狭くなるよ
うにして傾斜して取付け、各流穀板2によって流穀室3
を形成する。FIG. 2 is a schematic sectional view of a grain dryer embodying the present invention. In the figure, reference numeral 1 denotes a storage chamber of a dryer, and two pairs of shed boards 2 are attached to the lower portion of the shed board so as to be inclined so that a space becomes narrower as it goes downward.
To form.
流穀板2の各下辺には網板4を2枚づつ平行に接続し、
その間に乾燥室5を形成する。そして、貯留室1の中心
寄りに設けた内側の2枚の網板4の間に乾燥熱源である
バーナ10を設置した熱風室6を形成し、外側の2枚の網
板4、4と左右の機壁7との間に排気室8を形成し、そ
の排気室8の排気ファン9と連設する。Two mesh plates 4 are connected in parallel to each lower side of the grain plate 2,
In the meantime, the drying chamber 5 is formed. Then, a hot air chamber 6 in which a burner 10 as a dry heat source is installed is formed between two inner mesh plates 4 provided near the center of the storage chamber 1, and two outer mesh plates 4 and 4 and left and right sides are formed. An exhaust chamber 8 is formed between the exhaust chamber 8 and the machine wall 7, and is connected to an exhaust fan 9 in the exhaust chamber 8.
11は樋状に形成した集穀室であり、その底部に下部ラセ
ン12を架設し、その終端を昇降機13の下部入口に連結す
る。14は乾燥室5の下端出口に軸支したロータリバルブ
であり、その回転により貯留室1の穀物を乾燥室5を経
て集穀室11に流出させる。Reference numeral 11 is a gutter-shaped grain collecting chamber, in which a lower helix 12 is installed on the bottom thereof, and the end of the lower helix 12 is connected to the lower inlet of the elevator 13. A rotary valve 14 is axially supported at the lower end outlet of the drying chamber 5, and the rotation of the rotary valve 14 causes the grains in the storage chamber 1 to flow out through the drying chamber 5 into the grain collecting chamber 11.
昇降機13の上部出口は、貯留室1の天井に設置した上部
ラセン15に連結し、この上部ラセン15の出口を貯留室1
にのぞませる。The upper outlet of the elevator 13 is connected to the upper helix 15 installed on the ceiling of the storage chamber 1, and the outlet of the upper helix 15 is connected to the upper chamber 15.
Peek into.
20は乾燥中の穀物の含水率(水分)を測定する水分計で
あり、例えば流穀室3内に設置する。21は外気温度を測
定するために機壁に取付けた外気温センサ、22は外気湿
度を測定するために機壁7に取付けた外気湿度センサで
ある。Reference numeral 20 denotes a moisture meter for measuring the moisture content (moisture content) of the grain being dried, which is installed, for example, in the shed chamber 3. Reference numeral 21 is an outside air temperature sensor mounted on the machine wall for measuring the outside air temperature, and 22 is an outside air humidity sensor mounted on the machine wall 7 for measuring the outside air humidity.
23は流穀室3内に設置して穀物の温度を測定する穀温セ
ンサ、24は排気室8内に設置した排気温センサ、25は熱
風室6に設置した熱風温センサである。また26はバーナ
10に燃料を供給する燃料ポンプであり、27はバーナ10に
供給する燃料を調節する燃料バルブである。23 is a grain temperature sensor installed in the grain shedding chamber 3 to measure the temperature of grains, 24 is an exhaust temperature sensor installed in the exhaust chamber 8, and 25 is a hot air temperature sensor installed in the hot air chamber 6. 26 is a burner
A fuel pump 10 supplies fuel to the burner 27, and a fuel valve 27 adjusts the fuel supplied to the burner 10.
第3図は本発明実施例の制御系の一例を示すブロック図
である。FIG. 3 is a block diagram showing an example of the control system of the embodiment of the present invention.
図において、30はマイクロプロセッサ形態のCPU(中央
処理装置)であり、あらかじめ定められた手順により後
述のように各種の演算や判断等を行い各構成要素を制御
する。In the figure, 30 is a CPU (central processing unit) in the form of a microprocessor, which controls each component by performing various calculations and judgments as will be described later by a predetermined procedure.
31は例えば乾燥ボタン、張込ボタン、排出ボタン、停止
ボタン、乾燥停止するときの水分を設定する停止水分設
定スイッチなどを配置した操作入力設定器であり、入力
回路32を介してCPU30と接続する。また、水分計20およ
び各センサ21〜25をA/D変換部33を介してCPU30と接続す
る。Reference numeral 31 is an operation input setting device in which, for example, a drying button, a squeeze button, a discharge button, a stop button, a stop moisture setting switch for setting moisture when stopping drying is arranged, and is connected to the CPU 30 via the input circuit 32. . Further, the moisture meter 20 and each of the sensors 21 to 25 are connected to the CPU 30 via the A / D converter 33.
34は出力回路35を介してCPU30と接続する表示部であ
り、この表示部34は各種の表示を行う。Reference numeral 34 denotes a display unit connected to the CPU 30 via the output circuit 35, and the display unit 34 performs various displays.
36はCPU30が各構成要素を制御するための制御手順を記
憶するリード・オンリ・メモリ(ROM)と、測定データ
等の各種のデータをいったん記憶するランダム・アクセ
ス・メモリ(RAM)とからなる記憶装置である。36 is a memory composed of a read-only memory (ROM) that stores control procedures for the CPU 30 to control each constituent element, and a random access memory (RAM) that temporarily stores various data such as measurement data. It is a device.
37〜39はそれぞれCPU30と接続する出力回路であり、出
力回路37には搬送モータ40、ヒータ41、水分計モータ42
をそれぞれ接続し、出力回路38にはファンモータ43を接
続し、出力回路39には燃料ポンプ26および燃料バルブ27
を接続する。37 to 39 are output circuits connected to the CPU 30, respectively. The output circuit 37 includes a transport motor 40, a heater 41, and a moisture meter motor 42.
, The fan motor 43 is connected to the output circuit 38, and the fuel pump 26 and the fuel valve 27 are connected to the output circuit 39.
Connect.
次に、以上のように構成する本発明実施例の動作例を第
4図のフロチャートを参照して説明する。Next, an operation example of the embodiment of the present invention configured as described above will be described with reference to the flowchart of FIG.
まず、乾燥に先立って操作者が停止水分設定スイッチ停
止水分値MLを設定しておく。First, prior to drying, the operator sets the stop moisture setting switch stop moisture value ML.
そして、乾燥ボタンが投入されて乾燥が開始されると、
穀物の張込量や外気温度などに応じてバーナ10の目標熱
風温度などが設定され、バーナ10が点火される(ステッ
プS1)。次に、その目標熱風温度となるようにバーナ10
の熱風温度が制御されるとともに(ステップS2)、水分
計20で穀物の水分測定を行う(ステップS3)。Then, when the dry button is turned on to start drying,
The target hot air temperature of the burner 10 and the like are set according to the amount of grain infiltration and the outside air temperature, and the burner 10 is ignited (step S1). Next, the burner 10 is adjusted to reach the target hot air temperature.
The hot air temperature is controlled (step S2), and the moisture content of the grain is measured by the moisture meter 20 (step S3).
次に、その測定水分値MSが停止水分値MLよりも上回って
いるか否か判定し(ステップS4)、上回っているときに
は、予約または休止時間になるまでこれら上述の処理を
くり返す(ステップS2〜S5)。Next, it is determined whether or not the measured moisture value MS is higher than the stopped moisture value ML (step S4), and if it is higher, the above-mentioned processing is repeated until the reservation or the rest time is reached (step S2 to S5).
そして、予約または休止時間になると(ステップS5)、
第5図に示すように休止開始時刻t1において水分計20の
測定水分値MS1を記憶し(ステップS7)、バーナ10の運
転を停止して休止に入る(ステップS8)。この休止期間
中は、少なくともバーナ10の運転を停止して排気ファン
9による通風乾燥を行うが、バーナ10と排気ファン9の
運転を同時に停止するようにしてもよい。Then, when the reservation or the rest time comes (step S5),
As shown in FIG. 5, at the pause start time t1, the measured moisture value MS1 of the moisture meter 20 is stored (step S7), the burner 10 operation is stopped, and the burner 10 is suspended (step S8). During this suspension period, at least the operation of the burner 10 is stopped and ventilation drying is performed by the exhaust fan 9, but the burner 10 and the exhaust fan 9 may be stopped simultaneously.
このような休止が終了して再乾燥が開始すると(ステッ
プS9)、バーナ10が再点灯されてその熱風温度制御が行
われる(ステップS10、S11)。また、第5図に示すよう
に休止終了直後の時刻t2において水分計20が水分測定を
行い(ステップS12)、測定水分値MS2を得る。When such a pause is completed and re-drying is started (step S9), the burner 10 is turned on again and its hot air temperature control is performed (steps S10, S11). Further, as shown in FIG. 5, the moisture meter 20 measures the moisture at time t2 immediately after the end of the rest (step S12) to obtain the measured moisture value MS2.
次に、このように得た測定水分値MS2、およびステップS
7で記憶されている測定水分値MS1に基づき、以下の手順
によって停止水分値MLを補正し、補正停止水分値MLSを
求める(ステップS13)。Then, the measured moisture value MS2 thus obtained, and the step S
Based on the measured moisture value MS1 stored in 7, the stop moisture value ML is corrected by the following procedure to obtain the corrected stop moisture value MLS (step S13).
まず、休止期間中における穀物水分の戻り△xを次式に
よって求める。First, the return Δx of grain moisture during the rest period is calculated by the following equation.
次に、この求めた穀物水分の戻り△xの大小を、あらか
じめ定められている定数x、yと比較し、その比較結果
に応じて補正停止水分値MLSを求めて停止水分値MLを補
正する。このような穀物水分の戻り△xの大小と、これ
に対応する補正停止水分値MLSとの関係の一例を第1表
に示す。 Next, the magnitude of the obtained grain moisture return Δx is compared with predetermined constants x and y, and the corrected stop moisture value MLS is calculated according to the comparison result to correct the stop moisture value ML. . Table 1 shows an example of the relationship between the magnitude of the return Δx of grain moisture and the corresponding corrected stop moisture value MLS.
なお、第1表中のx1,x2はあらかじめ定めてある定数で
あり、0<x1<x2の関係にあるもとする。 It should be noted that x1 and x2 in Table 1 are constants determined in advance and are assumed to have a relationship of 0 <x1 <x2.
従って、第1表によれば穀物水分の戻り△xが、x≦△
xのときには、補正停止水分値MLSは、MLS=ML−x1とな
る。Therefore, according to Table 1, the return of grain moisture Δx is x ≦ Δ
When x, the corrected stop moisture value MLS is MLS = ML−x1.
そしてバーナ10の熱風温度制御を行うとともに(ステッ
プS14)、水分計20の測定水分値MSが補正停止水分値MLS
に達したときには(ステップ15)、バーナ10を停止させ
て乾燥を終了する。第5図に示すように乾燥終了時刻t3
における穀物水分の値は補正停止水分値MLSとなるが、
乾燥終了から所定時間経過後には、水分の戻りによって
所望の水分値である停止水分値MLに落ち着く。Then, while controlling the hot air temperature of the burner 10 (step S14), the measured moisture value MS of the moisture meter 20 is corrected to the stopped moisture value MLS.
When it reaches (step 15), the burner 10 is stopped and the drying is completed. As shown in FIG. 5, the drying end time t3
The grain moisture value at is the corrected stop moisture value MLS,
After a lapse of a predetermined time from the completion of the drying, the moisture returns to settle down to the desired moisture value, the stopped moisture value ML.
なお、本発明実施例では、休止時における穀物水分の戻
り△xに応じて補正停止水分値MLSを求めるようにした
が、休止時と乾燥終了時とでは外気湿度が極端に異なる
場合があり、この場合には上述の制御は好ましくないの
で、その外気湿度の変化を考慮する必要がある。In the embodiment of the present invention, the corrected stop moisture value MLS is obtained according to the return Δx of grain moisture at the time of rest, but the outside air humidity may be extremely different between the time of rest and the end of drying, In this case, the above-mentioned control is not preferable, so it is necessary to consider the change in the outside air humidity.
そこで、乾燥終了時の外気湿度が休止時の外気湿度より
も極端に増加しているときには、さらに乾燥を継続する
ようにし、他方乾燥終了時の外気湿度が休止時の外気湿
度よりも極端に減少しているときには、乾燥を抑制する
ように構成する。Therefore, when the outside air humidity at the end of drying is significantly higher than the outside air humidity at the time of rest, the drying should be continued, while the outside air humidity at the end of drying is significantly reduced compared to the outside air humidity at the time of rest. When it is, it is configured to suppress the drying.
(発明の効果) 以上のように本発明では、休止期間中における穀物水分
の戻りを求め、この戻りに応じて停止水分値を補正する
ようにしたので、この補正値に測定水分値が達するまで
乾燥を行い、その乾燥終了後に水分の戻りを利用して停
止水分値に落ち着かせることができる。従って、本発明
では、環境条件や未熟米の混入率にかかわらず穀物を所
望の水分値に仕上げることができ、もって仕上水分の精
度を向上させることができる。(Effect of the invention) As described above, in the present invention, the return of grain moisture during the rest period is obtained, and the stop moisture value is corrected according to this return, so that the measured moisture value reaches this corrected value. Drying can be performed, and after the drying is completed, the return of moisture can be used to settle down to the stopped moisture value. Therefore, in the present invention, the grain can be finished to a desired moisture value regardless of the environmental conditions and the mixing ratio of unripe rice, and thus the precision of finishing moisture can be improved.
第1図は本発明の機能図、第2図は本発明を実施した穀
物乾燥機の概略断面図、第3図はそのブロック図、第4
図は本発明実施例の動作例を示すフローチャート、第5
図は乾燥曲線の一例を示すグラフである。 10はバーナ、20は水分計、Aは停止水分値設定手段、B
は乾燥終了制御手段、Cは休止乾燥制御手段、Dは戻り
検出手段、Eは停止水分値補正手段。1 is a functional diagram of the present invention, FIG. 2 is a schematic sectional view of a grain dryer in which the present invention is implemented, FIG. 3 is a block diagram thereof, and FIG.
FIG. 5 is a flow chart showing an operation example of the embodiment of the present invention,
The figure is a graph showing an example of a drying curve. 10 is a burner, 20 is a moisture meter, A is a stopped moisture value setting means, B
Is a drying end control means, C is a pause drying control means, D is a return detection means, and E is a stopped moisture value correction means.
Claims (1)
水分計で測定し、その測定水分値が停止水分値設定手段
で設定してある停止水分値に一致するときに、バーナの
燃焼を停止して乾燥を終了する乾燥終了制御手段を有す
る穀物乾燥機において、 乾燥途中の所定のタイミングで前記バーナの燃焼を停止
して休止乾燥を行い、所定時間経過後にバーナを再燃焼
させる休止乾燥制御手段と、 その休止乾燥制御手段による休止乾燥の開始時および終
了時に水分計の各測定水分値を読み込み、その両測定水
分値から水分の戻りを検出する戻り検出手段と、 その戻りに応じて前記停止水分値設定手段で設定してあ
る停止水分値を補正する停止水分値補正手段とを設けて
なる停止水分補正装置。1. The burner is burned when the moisture content of grains dried by hot air from the burner is measured by a moisture meter and the measured moisture value matches the stopped moisture value set by the stopped moisture value setting means. In a grain dryer having a drying end control means for stopping and ending the drying, in the drying drying control, the combustion of the burner is stopped at a predetermined timing during the drying to perform the idle drying, and the burner is reburned after a predetermined time elapses. Means, a return detection means for reading each measured moisture value of the moisture meter at the start and end of the pause drying by the pause drying control means, and detecting return of moisture from both measured moisture values, and the return detection means according to the return. A stopped moisture correction device provided with a stopped moisture value correcting means for correcting the stopped moisture value set by the stopped moisture value setting means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62315374A JPH0789023B2 (en) | 1987-12-15 | 1987-12-15 | Grain dryer stop moisture correction device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62315374A JPH0789023B2 (en) | 1987-12-15 | 1987-12-15 | Grain dryer stop moisture correction device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01159583A JPH01159583A (en) | 1989-06-22 |
JPH0789023B2 true JPH0789023B2 (en) | 1995-09-27 |
Family
ID=18064636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62315374A Expired - Lifetime JPH0789023B2 (en) | 1987-12-15 | 1987-12-15 | Grain dryer stop moisture correction device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0789023B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63223485A (en) * | 1987-03-11 | 1988-09-16 | 静岡製機株式会社 | Drying control method of cereal drier |
-
1987
- 1987-12-15 JP JP62315374A patent/JPH0789023B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63223485A (en) * | 1987-03-11 | 1988-09-16 | 静岡製機株式会社 | Drying control method of cereal drier |
Also Published As
Publication number | Publication date |
---|---|
JPH01159583A (en) | 1989-06-22 |
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