JPH01230981A - Grain drying machine - Google Patents

Grain drying machine

Info

Publication number
JPH01230981A
JPH01230981A JP5418788A JP5418788A JPH01230981A JP H01230981 A JPH01230981 A JP H01230981A JP 5418788 A JP5418788 A JP 5418788A JP 5418788 A JP5418788 A JP 5418788A JP H01230981 A JPH01230981 A JP H01230981A
Authority
JP
Japan
Prior art keywords
hot air
air temperature
objective
target
grain
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.)
Pending
Application number
JP5418788A
Other languages
Japanese (ja)
Inventor
Sadakazu Fujioka
定和 藤岡
Kiyoaki Minazu
清明 水津
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Original Assignee
Iseki and Co Ltd
Iseki Agricultural Machinery Mfg Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Iseki and Co Ltd, Iseki Agricultural Machinery Mfg Co Ltd filed Critical Iseki and Co Ltd
Priority to JP5418788A priority Critical patent/JPH01230981A/en
Publication of JPH01230981A publication Critical patent/JPH01230981A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To prevent poor taste when high moisture content grains are filled and improve the finishing quality of the grains, by a method wherein a changing signal is outputted to change an objective hot air temperature so as to be lower than a safety limit hot air temperature when the objective hot air temperature, set in accordance with the filling amount of the grains, has exceeded the safety limit hot air temperature while an objective air discharging amount is increased. CONSTITUTION:A safety limit hot air temperature setting means C sets the safety limit hot air temperature of a burner in accordance with the value of moisture content, measured by a moisture meter 20, during the drying of grains. A comparing outputting means D compares a set safety limit hot air temperature with the objective hot air temperature of a burner, which is set by an objective hot air temperature setting means A, and when the objective hot air temperature exceeds the safety limit hot air temperature, the comparing and outputting means D outputs a changing signal. According to this output, an objective value changing means E changes the persent set objective hot air temperature to a value lower than the safety limit hot air temperature and increases a present set objective air discharging amount. Then, a control means F controls the burner 10 and an air discharging fan 9 to respective objective values, changed and increased. According to this method, the low-temperature drying of the grains may be effected and the amount of discharging air may be increased by an amount corresponding to the reduction of the hot air temperature when the grains contain high moisture.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、穀物を熱風で乾燥する穀物乾燥機の改良に関
する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a grain dryer that dries grain with hot air.

(従来の技術) 乾燥機に張込んだ穀物の樋に合わせてタイヤルをセット
すると、自動的に熱風温度の目標値が決まり、その目標
値どおりの熱風温度になるようにバーナの燃焼を制御す
る穀物乾燥機がある。
(Prior technology) When the tire is set to match the gutter of the grain loaded in the dryer, the target value of the hot air temperature is automatically determined, and the combustion of the burner is controlled so that the hot air temperature matches the target value. There is a grain dryer.

(発明が解決しようとする問題点) このような乾燥機においては、乾燥効率を向上する都合
上、張込量が多くなるほど熱風温度の目標値が高くなる
ように自動設定される。このため穀物の水分値が高い場
合は大穴に張込むと高温により、品質劣化を生じて食味
不良となるので、仕ヒリ品質が低下するという問題が生
じていた。
(Problems to be Solved by the Invention) In such a dryer, in order to improve drying efficiency, the target value of the hot air temperature is automatically set to become higher as the amount of hot air is increased. For this reason, if the grain has a high moisture content and is poured into a large hole, the high temperature will cause the quality to deteriorate and the taste to be poor, resulting in a problem in which the quality of the grain deteriorates.

そこで、本発明は、上述のような特に高水分の穀物を犬
r)に張り込んだ場合に生じがちな食味不良を防止し、
もって穀物の什−ヒリ品質の向上を図ることを目的とす
る。
Therefore, the present invention prevents the poor taste that tends to occur when dogs are stuffed with especially high-moisture grains as described above,
The purpose is to improve the grain quality of grains.

(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 the Problems) In order to achieve the above object, the present invention has the following configuration.

すなわち、本発明は、穀物の張込量に応じてバーナ10
の目標熱風温度を設定する目標熱風温度設定手段Aと、 排気ファン9の[1標排気量を設定する目標排気量設定
手段Bと、 乾燥中の穀物水分を測定する水分計20と、測定水分値
に応じてバーナlOの安全限界熱風温度を設定する安全
限界熱風温度設定手段Cと、 設定安全限界熱風温度と設定目標熱風温度を比較し、目
標熱風温度が安全限界熱風温度を上回るときに変更信号
を出力する比較出力手段りと、変更信号が出力されたと
きに、設定されている目標熱風温度を前記安全限界熱風
温度以下に変更するとともに、設定されている目標排気
量を増加する目標値変更手段Eと、 その変更、増加された各目標値となるように前記バーナ
の熱風温度および排気ファンの排気量をそれぞれ制御す
る制御手段Fとからなる。
That is, in the present invention, the burner 10 is adjusted according to the amount of grain loaded.
a target hot air temperature setting means A for setting a target hot air temperature of the exhaust fan 9; a target exhaust amount setting means B for setting a standard displacement of the exhaust fan 9; a moisture meter 20 for measuring the moisture content of grains during drying; The safety limit hot air temperature setting means C sets the safety limit hot air temperature of the burner lO according to the value, and the set safe limit hot air temperature is compared with the set target hot air temperature, and the set hot air temperature is changed when the target hot air temperature exceeds the safe limit hot air temperature. A comparison output means for outputting a signal and a target value for changing the set target hot air temperature to below the safety limit hot air temperature and increasing the set target displacement amount when the change signal is output. It consists of a changing means E, and a control means F that controls the hot air temperature of the burner and the exhaust amount of the exhaust fan so that the changed or increased target values are achieved.

(作用) 穀物の乾燥中、安全限界熱風温度設定子Bcは、水分計
20の測定水分値に応じてバーナ1゜の安全限界熱風温
度を設定する。
(Function) During grain drying, the safety limit hot air temperature setter Bc sets the safety limit hot air temperature of the burner 1° according to the moisture value measured by the moisture meter 20.

比較出力手段りは、その設定された安全限界熱風温度を
目標熱風温度設定手段Aで設定されているバーナ10の
目標熱風温度と比較し、目標熱風温度が安全限界熱風温
度を上回るときに変更信号を出力する。
The comparison output means compares the set safe limit hot air temperature with the target hot air temperature of the burner 10 set by the target hot air temperature setting means A, and outputs a change signal when the target hot air temperature exceeds the safe limit hot air temperature. Output.

この変更信号が出力されると、目標値変更手段Eは現在
設定されている目標熱風温度を上述のように設定した安
全限界熱風温度以下に変更するとともに、現在設定され
ている目標排気量を増加する。
When this change signal is output, the target value changing means E changes the currently set target hot air temperature to below the safety limit hot air temperature set as described above, and increases the currently set target displacement amount. do.

制御手段Fは、その変更、増加された各目標値となるよ
うにバーナ10および排気ファン9をそれぞれ制御する
The control means F controls the burner 10 and the exhaust fan 9 so as to achieve the changed or increased target values.

これにより、穀物が高水分のときには、バーナ10の熱
風温度が比較的低温となって穀物を低温乾燥できるとと
もに、八−す10の熱風温度を低ドさせた分だけ排気フ
ァン9の排気量を増加させるので乾燥速度は低下しない
As a result, when the grain has high moisture content, the hot air temperature of the burner 10 becomes relatively low and the grain can be dried at a low temperature, and the displacement of the exhaust fan 9 is reduced by the amount that the hot air temperature of the eighth 10 is lowered. Since the drying rate is increased, the drying rate does not decrease.

(実施例) 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

第2図は本発明を実施した穀物乾爆機の概略断面図であ
る。図において、lは乾燥機の貯留室であり、その下部
に2対の流穀板2を下方に行くに徒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, l is the storage chamber of the dryer, and two pairs of floating grain plates 2 are installed at the lower part of the dryer so that they are tilted so that the distance between them becomes narrower as they go downward. Room 3
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を殺青した熱風室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 floating grain plate 2,
A drying chamber 5 is formed between them. Then, a hot air chamber 6 in which a burner 10, which is a drying heat source, is used as a drying heat source is formed between two inner mesh plates 4 provided near the center of the storage chamber 1, and a hot air chamber 6 is formed between two outer mesh plates 4.4 on the left and right sides. An exhaust chamber 8 is formed between the machine wall 7 and the
It is connected to the exhaust fan 9 of 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、その終端を昇穀機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lの穀物を乾燥
室5を経て集穀室11に流出させる。
Reference numeral 11 denotes a grain collection chamber formed in the shape of a gutter, and a lower helix 12 is installed at the bottom of the chamber, and its terminal end is connected to the lower entrance of a grain hoist 13. Reference numeral 14 denotes a rotary valve pivotally supported at the lower end outlet of the drying chamber 5, and its rotation causes the grains in the storage chamber 1 to flow out through the drying chamber 5 into the grain collection chamber 11.

昇穀機13の上部出口は、貯留室lの天井に設置したL
部ラセン15に連結し、この上部ラセン15の出口を貯
留室lにのぞませる。
The upper exit of the grain raising machine 13 is connected to the L installed on the ceiling of the storage room L.
The outlet of this upper helix 15 looks into the storage chamber l.

20は乾燥中の穀物の含水率(水分)を1粒づつ測定す
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7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。
20 is a moisture meter that measures the moisture content (moisture) of each grain of grain during drying, and is installed, for example, in the flow grain room 3. Reference numeral 21 denotes an outside air temperature sensor attached to the aircraft wall 7 to measure the outside air temperature, and 22 an outside air humidity sensor attached to the aircraft wall 7 to measure 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、2
5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
は八−す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 flow chamber 3 to measure the temperature of the grain; 24 is an exhaust temperature sensor installed in the exhaust chamber 8;
5 is a hot air temperature sensor installed in the hot air chamber 6. Also 26
27 is a fuel pump that supplies fuel to the burner 10;
is a fuel valve that regulates the fuel supplied to the eighth 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 a control system according to an 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 in the form of a microprocessor.
(Central processing unit), which performs various calculations, judgments, etc., as described below, and controls each component according to predetermined procedures.

31は例えば乾燥ボタン、張込ボタン、排出ボタン、停
止Fボタン、乾燥を停止するための停止水分値を設定す
る停■ト水分設定スイッチ、貯留室1への穀物の張込量
に応じて設定する張込量設定スインチなどを配置した操
作人力1没定器であり、入力回路32を介してCPU3
0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
31 are, for example, a drying button, a loading button, a discharge button, a stop F button, a stop moisture setting switch for setting a stop moisture value for stopping drying, and a stop moisture setting switch that is set according to the amount of grain loaded into storage chamber 1. It is a single-operator immersion device that is equipped with a tensioning amount setting switch, etc., and is connected to the CPU 3 via an input circuit 32.
Connect with 0. In addition, the moisture meter 20 and each sensor 21~
25 is 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。
34 is a display section connected to the CPU 30 via an output circuit 35, and this display section 34 performs various displays.

36はCPU30が各構成要素をff111mするため
の制御手順を記憶するリードΦ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 read Φ only memory (ROM) that stores the control procedure for the CPU 30 to ff111m each component.
) and a random access memory (RAM) that temporarily stores various data such as measurement data.

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, and the output circuit 37 includes a transport motor 40, a heater 41,
A moisture meter motor 42 is connected to each, a fan motor 43 is connected to the output circuit 38, and a fuel pump 26 and a fuel valve 27 are connected to the output circuit 39.

次に、以上のように構成する本発明実施例の制御例につ
いて第4図を参照して説明する。
Next, a control example of the embodiment of the present invention configured as described above will be explained with reference to FIG.

まず貯留室1に穀物を張込み、その穀物の多込み着に応
じて操作入力設定器31上に配置した張込j!設定スイ
ッチを設定する。また、乾燥を停止二する停止水分値を
停止F水分設定スイッチで設定する。
First, grain is loaded into the storage chamber 1, and depending on the amount of grain loaded, the loading j! Set the configuration switch. In addition, the stop moisture value at which drying is to be stopped is set using the stop F moisture setting switch.

次に、張込量設定スイッチで設定されている張込量、お
よび外気温センサ21のAlll外定温度に応じてバー
ナlOの目標熱風温度を“TC”“に1没定する(ステ
ップ51)。また、同様に排気ファン9の目標排気量、
換言すれば排気ファン9の目標回転数を標準値の“RC
”に設定する(ステップS2)。
Next, the target hot air temperature of the burner IO is set to "TC" according to the charging amount set by the charging amount setting switch and the All external temperature of the outside air temperature sensor 21 (step 51). Similarly, the target displacement of the exhaust fan 9,
In other words, the target rotation speed of the exhaust fan 9 is set to the standard value "RC".
” (step S2).

次に、バーナ10を点火するとともに(ステップS3)
、水分計20を作動して穀物−粒ずつの水分測定を所定
回数行い、その各測定値を平均して水分値を算出する(
ステップS4,35)。
Next, while igniting the burner 10 (step S3)
, operate the moisture meter 20 to measure the moisture content of each grain a predetermined number of times, and calculate the moisture value by averaging each measurement value (
Step S4, 35).

そして、その算出した水分値が停止F水分値に達しない
ときには(ステップS6)、ステップS4で水分測定し
て記憶している各測定値から穀物水分のばらつきを算出
しくステップS7)、その算出したばらつきとステップ
S5で求めた測定水分値に基づき、バーナ10の安全限
界熱風温度を” T S″に設定する(ステップS8)
When the calculated moisture value does not reach the stop F moisture value (step S6), the variation in grain moisture is calculated from each measured value measured and stored in step S4. Based on the variation and the measured moisture value obtained in step S5, the safe limit hot air temperature of the burner 10 is set to "TS" (step S8)
.

この安全限界熱風温度TSは、穀物の乾燥が高温乾燥に
ならずに安全に行える限界値を示し、例えば第5図に示
すような値を示す、従って、第5図に示すように例えば
穀物の測定水分値が25%〜30%の範囲で穀物水分の
ばらつきが「中」のときには、安全限界熱風温度は33
℃に設定される。
This safe limit hot air temperature TS indicates the limit value at which grains can be safely dried without becoming dry at high temperatures, and shows a value as shown in FIG. 5, for example. Therefore, as shown in FIG. When the measured moisture value is in the range of 25% to 30% and the variation in grain moisture is "medium", the safe limit hot air temperature is 33%.
Set to ℃.

第5図において破線、実線および一点鎖線は、穀物水分
のばらつきが「大」、「中」および「小」にそれぞれ対
応する安全限界熱風温度の曲線を示す。
In FIG. 5, the broken line, the solid line, and the dashed-dot line indicate the safety limit hot air temperature curves corresponding to "large", "medium", and "small" grain moisture variations, respectively.

次に、このように設定された安全限界熱風温度の“TS
″をステップS1で設定したバーナ10の目標熱風温度
の“TC”と比較する(ステップS9)。
Next, the “TS” of the safety limit hot air temperature set in this way is
'' is compared with "TC" of the target hot air temperature of the burner 10 set in step S1 (step S9).

その結果、例えば穀物が高水分の場合や高水分の穀物を
多く台む場合のように目標熱風温度の” T C”が安
全限界熱風温度の“TS”以上のときには、バーナ10
の目標熱風温度を“TC”からTS”または“TS”以
下に低下させるとともに(ステップ5IO)、排気ファ
ン9の目標回転数を“RC″の(TC−TA/TS−T
A)倍に増加する(ステップ5ll)、ここで、TAは
外気温センサの測定外気温度である。
As a result, when the target hot air temperature "TC" is higher than the safe limit hot air temperature "TS", for example when the grain has high moisture content or when a large number of grains with high moisture content are loaded, the burner 10
The target hot air temperature of "RC" is lowered from "TC" to "TS" or below "TS" (step 5IO), and the target rotation speed of exhaust fan 9 is lowered to (TC-TA/TS-T) of "RC".
A) Increase by a factor of 5 (step 5ll), where TA is the outside air temperature measured by the outside air temperature sensor.

これにより、穀物が高水分のときには、八−す10はそ
の目標熱風温度が“TS”に低下するので、穀物は低温
乾燥となってその食味不良の発生を防IFすることがで
きる。また、バーナ10はその(コ標熱風温度が“TS
”に低下するものの、排気ファン9によって吸引排気さ
れる風量は増加するので、穀物に付与される熱量はほぼ
一定に維持され、もって乾燥速度が低下することはない
As a result, when the grain has a high moisture content, the target hot air temperature of the eight-tablet 10 is lowered to "TS", so that the grain is dried at a low temperature and the occurrence of poor taste can be prevented by IF. In addition, the burner 10 has a hot air temperature of "TS".
However, since the amount of air sucked and exhausted by the exhaust fan 9 increases, the amount of heat imparted to the grains is maintained approximately constant, and the drying speed does not decrease.

他方、乾燥が進行して乾燥後期の場合のように[]標熟
熱風温の“TC”が安全限界熱風温度の“TS”以下の
ときには、八−すlOの目標熱風温度を“TC”にする
とともに(ステップ512)、排気ファン9の目標回転
数を“RC″とする(ステップ5L3)。
On the other hand, when the drying progresses and the target hot air temperature "TC" is less than the safe limit hot air temperature "TS", as in the late drying stage, the target hot air temperature of 8-slO is set to "TC". At the same time, the target rotation speed of the exhaust fan 9 is set to "RC" (step 5L3).

以上の制御例では、穀物の水分値および穀物水分のばら
つきによりバーナ10の安全限界熱風温度を設定した。
In the above control example, the safe limit hot air temperature of the burner 10 was set based on the grain moisture value and the variation in grain moisture.

しかし、本発明では、さらに穀物の貯蔵性をその設定要
素とすることも可能である。
However, in the present invention, it is also possible to use the storability of grain as a setting factor.

また、本発明では、貯留室1内への穀物の張込■に応じ
てlji’l環着を変更させるときには、上記安全限界
熱風温度は張込量に応じて決定するのが好ましい、すな
わち、穀物を大量に張込んでその穀物の循環量を大きく
して乾燥するときには、乾燥室を短時間で通過して熱的
損傷が小さいので、安全限界熱風温度を高く設定する。
Furthermore, in the present invention, when changing the lji'l ring depending on the amount of grain loaded into the storage chamber 1, it is preferable that the safe limit hot air temperature is determined according to the amount of grain loaded, that is, When drying a large amount of grain by increasing the amount of grain circulated, the safe limit hot air temperature is set high because the grain passes through the drying chamber in a short time and thermal damage is small.

さらに、本発明では、上記安全限界熱風温度を1jジ定
する際に、そのときの外気温度、穀物温度および排気温
度を考慮するのが好ましい。
Furthermore, in the present invention, when determining the safe limit hot air temperature 1j, it is preferable to take into consideration the outside air temperature, grain temperature, and exhaust temperature at that time.

(発明の効果) 以上のように本発明では、穀物が高水分のときまたは高
水分の穀物を多く含むときに、バーナの目標熱風温度を
穀物の品質劣化を招かない安全限界熱風温度以下に低下
するとともに排気ファンの排気量を増大するようにした
ので、乾燥速度を低下させることなく高水分の穀物を比
較的低温で乾燥することができ、もって食味不良を防止
して穀物の仕上り品質を向上させることができる。
(Effects of the Invention) As described above, in the present invention, when the grain has high moisture content or contains a large amount of high moisture grain, the target hot air temperature of the burner is lowered to below the safe limit hot air temperature that does not cause quality deterioration of the grain. At the same time, the exhaust volume of the exhaust fan has been increased, making it possible to dry grains with high moisture content at a relatively low temperature without reducing the drying speed, thereby preventing poor taste and improving the finished quality of the grains. can be done.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の機能図、第2図は本発明実施例の概略
断面図、第3図はその制御系のブロック図、第4図はそ
の制御例を示すフローチャート、第5図は測定水分値と
安全限界熱風温度との関係を示す図である。 9は排気ファン、10はバーナ、2oは水分計、Aは目
標熱風温度設定手段、Bは目標排気量設定手段、Cは安
全限界熱風温度設定手段、Dは比較出力手段、Eは目標
値変更手段、Fは制御手段。 特許出願人  井関農機株式会社 代 理 人     牧 術部(ほか3名)第2図 とr   どb 第5図 シpり定<=tデイ21〔%]
Fig. 1 is a functional diagram of the present invention, Fig. 2 is a schematic sectional view of an embodiment of the invention, Fig. 3 is a block diagram of its control system, Fig. 4 is a flowchart showing an example of its control, and Fig. 5 is a measurement FIG. 3 is a diagram showing the relationship between moisture value and safe limit hot air temperature. 9 is an exhaust fan, 10 is a burner, 2o is a moisture meter, A is a target hot air temperature setting means, B is a target displacement setting means, C is a safety limit hot air temperature setting means, D is a comparison output means, and E is a target value change. Means, F is control means. Patent Applicant: Iseki Agricultural Machinery Co., Ltd. Agent, Farming Department (and 3 others) Figure 2 and R Dob Figure 5 Ship Specification <=t Day 21 [%]

Claims (1)

【特許請求の範囲】 穀物の張込量に応じてバーナの目標熱風温度を設定する
目標熱風温度設定手段と、 排気ファンの目標排気量を設定する目標排気量設定手段
と、 乾燥中の穀物水分を測定する水分計と、 測定水分値に応じてバーナの安全限界熱風温度を設定す
る安全限界熱風温度設定手段と、設定安全限界熱風温度
と設定目標熱風温度を比較し、目標熱風温度が安全限界
熱風温度を上回るときに変更信号を出力する比較出力手
段と、変更信号が出力されたときに、設定されている目
標熱風温度を前記安全限界熱風温度以下に変更するとと
もに、設定されている目標排気量を増加する目標値変更
手段と、 その変更、増加された各目標値となるように前記バーナ
の熱風温度および排気ファンの排気量をそれぞれ制御す
る制御手段とからなる穀物乾燥機。
[Scope of Claims] Target hot air temperature setting means for setting a target hot air temperature of a burner according to the amount of grain loaded; target displacement setting means for setting a target displacement of an exhaust fan; and grain moisture content during drying. A moisture meter that measures the temperature, a safety limit hot air temperature setting means that sets the safe limit hot air temperature of the burner according to the measured moisture value, and a device that compares the set safe limit hot air temperature with the set target hot air temperature, and determines whether the target hot air temperature is the safe limit. a comparison output means that outputs a change signal when the hot air temperature exceeds the hot air temperature; and a comparison output means that changes the set target hot air temperature to below the safety limit hot air temperature when the change signal is output, and outputs a set target exhaust temperature. A grain dryer comprising target value changing means for increasing the target value, and control means for controlling the hot air temperature of the burner and the exhaust volume of the exhaust fan so as to achieve the changed or increased target values.
JP5418788A 1988-03-08 1988-03-08 Grain drying machine Pending JPH01230981A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5418788A JPH01230981A (en) 1988-03-08 1988-03-08 Grain drying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5418788A JPH01230981A (en) 1988-03-08 1988-03-08 Grain drying machine

Publications (1)

Publication Number Publication Date
JPH01230981A true JPH01230981A (en) 1989-09-14

Family

ID=12963544

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5418788A Pending JPH01230981A (en) 1988-03-08 1988-03-08 Grain drying machine

Country Status (1)

Country Link
JP (1) JPH01230981A (en)

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