JPS611987A - grain dryer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application 1 The present invention generally relates to a grain dryer, and more particularly to a grain dryer that automatically sets a drying time according to the characteristics of the grain to be dried.

1-Prior art and its problems] Grain dryers generally use automatic/manual moisture meters to lean-pull grains circulating within the machine to measure the moisture content of the grains, and then dryer combustion is performed according to the measurement results. The system is controlled to adjust the hot air eddy current, drying time, etc., and the ventilation drying f1 operation is also performed by driving only the drive system.

By the way, the drying work using the dryer with the above-mentioned configuration is generally carried out under a thorough drying process, and the drying time required for the process is Drying R1 varies greatly depending on the type and characteristics of
The whole picture is so thick that it becomes distorted. Therefore, conventionally, a drying time that can prevent the occurrence of shell cracking, skin wrinkles, etc. is set in advance for each type of grain to be dried, and the set drying time is allocated to each grain type. -C Drying work was being carried out. However, if there is a large variation in initial moisture content even if the grains are of the same type, the drying time will be set to -11-, which may cause cracks in the grain shell, wrinkles in the epidermis, etc. To prevent it was a siege. Therefore, we are trying to prevent as much as possible the occurrence of cracking of the shell, etc., which leads to a decrease in the quality of the grains, and at the same time, drying
! It is possible to set the drying time according to the initial moisture content of the grain measured by automatic moisture L!, the loading field, the type of grain, etc. Automatic hot air temperature lα, initial settings for drying 11, 1. When the moisture content of the limped grains reaches a predetermined value (for example, 22%) during drying, the type of the grains, One of the methods is to adjust the initially set drying time by varying the heating stone according to the characteristics.

However, there is an additional 13 problem with the idea as described in 1. (1) The initially set hot air temperature is set anew as soon as the moisture content of the grains during drying reaches a predetermined value.
Since the heating drying claw is variable, even if the first l is of the same type, there is a difference in the time from the start of drying until the predetermined moisture content is reached due to the phase 3U of initial moisture content. As a result, there is a lot of variation in the time it takes to transition from drying using the initially set heat trace to drying using a hot air temperature that is varied depending on the characteristics of the grain to be dried, making it difficult to achieve efficient drying. There was a problem that not only was the operation rotational, but it was also impossible to eliminate causes of grain quality deterioration such as shell cracking. Furthermore, there was another problem in that the combustion condition of the barb combustion system of the dryer became unstable due to the sudden change in the initially set hot air temperature.

[[1] Therefore, the present invention aims to improve the problems described in the prior art, and its purpose is to eliminate causes of poor grain quality such as soil and shell cracks. It is possible to carry out efficient drying work.
-b +1' to prevent the combustion state of the burner combustion system of the dryer from becoming unstable by C'! It is possible to
Our goal is to provide grain dryers.

[Configuration] A feature of the present invention is that the covering vessel achieves the object described in -.
! A means for setting a temperature of 1 degree, a storage means for storing a plurality of hot air temperature measurement data set according to the type and characteristics of grain, and a means for detecting the actual hot air temperature in the dryer. When it is recognized that a predetermined time has elapsed since the start of the drying operation, the first hot air temperature setting value set by the preheating temperature setting means is determined based on the type and characteristics of the grain to be dried from the data. The second hot air temperature setting value is switched to the second hot air temperature setting value selected according to the second hot air temperature setting value, and the difference between the target value and the detected value given by the detection means is calculated using the second hot air temperature setting value as the target value. A calculation means for controlling combustion to gradually eliminate the problem is found in the grain dryer.

Initial nQ according to the amount of grain loaded into the dryer and the type of grain at the start of the C1 drying operation]
[Hot air temperature control is performed with the hot air temperature as the first target value. In both cases, after a predetermined period of time has elapsed from the start of the drying operation, one set of hot air temperature values according to the type and characteristics of the grains to be dried is selected from among the hot air temperature value data of the number set according to the type and characteristics of the grains. The drying operation is continued by selecting the data, calculating the difference from the detected value using the selected hot air temperature rα value as the second target fa, and making the difference gradually smaller.

[Example] The following is a detailed explanation of the present invention with reference to the drawings.

FIG. 1 is an overall perspective view of a grain dryer according to the first to fourth embodiments of the present invention, FIG. 2 is a block diagram according to the first to fourth embodiments of the present invention, and FIG. 3 is a block diagram according to the first to fourth embodiments of the present invention. FIG. 4 is a diagram showing the relationship between drying time and moisture content established using the hot air temperature value of the grain dryer as a parameter according to the first to fourth embodiments.
FIG. 5 is a diagram illustrating a method of controlling the hot air temperature of a grain dryer according to a fourth embodiment of the present invention.

First, a first embodiment according to the present invention will be described.

In FIG. 1, the dryer 1 is not shown]
It has an operation box 3 containing a burner unit and a burner combustion system 5. The operation box 3 includes a fuel setting device 7 for setting fuel supply to the burner combustion system 5 in multiple stages, an adjustment completion switch 9, and a drying I! 7 A fan adjustment device 11 that adjusts the rotation speed of the noan that supplies outside air ventilation into the interior of the 1
, an adjustment lamp 13, and operation switches 15 such as a drying switch, a loading amount switch, a grain type switch, and a target moisture content setting switch. 1() Fuel ¥31 tank 17, said tank 17 and electromagnetic pump 19
and a fuel tank communicating with the combustion chamber 23 via the electromagnetic valve 21.
Outside air vents such as il pipe 25 and 7 (not shown)
The combustion chamber 23 is provided with a means for supplying lice and has the combustion chamber 23 inside.
It is composed of a ventilation tube 27 and the like.

At least one of the electromagnetic pump 19 and the electromagnetic valve 21 is driven to open/close by a fuel supply amount control pulse signal outputted from a roll tank (not shown) to the second tank 1, so that fuel flows from the fuel tank 17. control the amount of fuel used. In embodiments according to the present invention, J
The electromagnetic valve 21 is controlled by so-called A-time control so that the electromagnetic valve 21 is controlled.

FIG. 2 shows a block diagram of the second Herolconit built in the operation box 3 mentioned above.

1, memory 103, input capo-1 105, input capo-1-
107, turn to the output capo-1 108, turn the output capo-+-, 109 to the right.

The CPU 101 performs arithmetic and logical operations and comparison operations. The input information of the CPU 101 is a digital input circuit!
'59, via input port 105, A/D conversion circuit 61, and input port 107! -J can be obtained.

Information sent to the CPU 101 via the digital input circuit 59 includes drying target temperature setting information, that is, hot air temperature 1σ setting information 63, safety sensor information 65, and operation information 67.

The hot air temperature setting information (K) 63 sets the scale from 1 to 1 according to the type and amount of grains to be dried that circulate through the grain circulation system (not shown) in the dryer 1. Therefore, the target hot air temperature setting knob 69 automatically sets the target hot air temperature (TC). = Detects the driving status of the dryer drive system such as the lower spiral drive system.Detects the driving status of the dryer combustion system such as the ignition heater, fuel 11 supply pump (["J] 15 electromagnetic pump), etc. The operation information 67 is output from the combustion system safety group 73. It is given from the operation switch 15 for performing the following steps.

CP t, h to J 101 via A/D conversion circuit 11
The information that can be obtained includes the actual heat and humidity (T13) information 81 in the dryer 1 outputted from the dryer 1 actual temperature detection sensor, that is, the heat exhaustion detection sensor 79, and the output from the outside air temperature detection sensor 83. Outside air temperature (1A) information 8
5 and grain moisture content information 89 output from the automatic moisture product 187.

The drive command signal for the dryer combustion system given from the CPU 101 is sent to the output ports 1 to 109 and the output circuit 11.
1 to a C fuel supply pump 19, a fuel 1 supply solenoid valve 21, a drive circuit (not shown) for a carburetor motor 37, and an ignition heater 35, respectively. CI” tJ 1
The drive command signal for the dryer drive system given from n1 is:
Ljλ is applied to the drive circuit (not shown) of the fan motor 29 via the analog output circuit 113.

The computer 103 contains control programs and the like, and also stores necessary data. A plurality of data stored in the main 103 are set when a predetermined period of time has elapsed from the start of the drying operation, as shown in FIG. There is data that uses the hot air thermoelectric value as a parameter to selectively determine the drying time.

CPtJ 101 has the functions described below.

■Target hot air temperature i setting information (TC) 63 outputted from the 11-marked Atagawa irrigation setting knob 69 and based on the type and amount of IC dried grains is input to the digital input circuit 59 and input boat 1.
05 and stores the information in the memory 103. ■Heat m thirst detection 1? The actual thermal wetness (T13) information 11j81 output from the input η79 is sent to the A/D conversion circuit 6.
1. Import via input port 107. ■Outside temperature) α
Outside air temperature (1△) information 8 output from the detection sensor 83
5 is taken in via the Δ/l′) conversion circuit 61 and the input port 107. Actual heat fqn temperature taken in ■■ (dou1
3 >Receive the difference temperature between information 81 and ■/υ target hot air temperature 1a setting information (10) 63 TC-1'rl)t'
> Calculate using the formula. ■When it is recognized that a predetermined period of time has passed since the start of the drying operation, the plurality of hot air temperature value data stored in the memory 103 (as shown in Fig. 3) are One of them (as shown) is selected, and from then on, the contemplation stone control is performed based on the selection.

This allows the drying time set at the start of the drying operation to be varied. )) Select the hot air temperature value as the target value, and sequentially calculate 2G of the target value and the stone quenching information (7 [3) 81 output from the hot air hot stone detection sensor 9, and Based on the result, the A time width of the control pulse signal output to the fuel supply electromagnetic valve 21 and the drive command signal to the fan motor 29 are varied. I will explain.

Prior to the start of the drying operation, the A pelleter turns the target hot air temperature setting knob 69 to a predetermined number of 11 according to the type of grain to be dried and the amount of grain to be dried. When the CI"UIOL recognizes that the operation information 67 for closing the ignition has been given from the setting knob 69 (TC') setting information 63 and the I switch 15, it sets the ignition r1 based on this information.
The time width of the control pulse signal output to the supply electromagnetic valve 21 is variable. , CP jJ 101 is
The actual heat received from the hot air temperature detection sensor 79 [1 (1
F3) Sequentially import the information 81 and compare it with the setting information 63 (1-C) Based on wave 0? The A time width of the control pulse (:i'l"j) output to the Tj magnetic valve 21 is adjusted. In this way, the CPU 101 The hot air heating stone control is continued using the (King C) setting information 63 set at the start of the drying work as the target value.The CPU 101
When it is recognized that the predetermined time has elapsed, the memory 103
Then call up the data with the hot air temperature value as a parameter as shown in Figure 3. C=11-PUlol selects and covers any one of the hot air hot stone curves ■, ■, ■, ■, . . . depending on the type, characteristics, etc. of the grain to be dried. For example, if the grains to be dried are (particularly) 1-split or J-shaped paddy, the curve ■, when the paddy is cracked, the curve ■, and when the paddy is y1, the curve ■, and the paddy that is difficult to crack. Therefore, each curve ■ is selected. Among the curves (■) to (■) above, the one with the lowest temperature and the best drying time is the curve (■), and the one with the highest contemplation temperature and the shortest drying time is the curve (■).

After cpuiol selects one curve from among the child curves (1) to (2), it continues the hot air drying operation with the heat temperature 11i indicated by the selected curve as the target value. That is, until the drying operation is completed, the heat P@temperature/humidity T B) provided from the detection sensor 79 is controlled by the control pulse signal A output to the electromagnetic valve 21 in order to gradually bring the information 81 into agreement with the target value. This means that the duration of the run time will be variable.

According to the first embodiment of the present invention, when the grains to be dried are loaded into the dryer, hot air is automatically Atsushi's first Jll
iiQ is determined and as a predetermined time elapses from the start of drying work, the initially set hot air temperature value is switched to another hot air temperature value according to the fφ type and characteristics of the grain, and the switched temperature value is set as the target. Since the combustion control is performed so that the actual hot air temperature gradually approaches the target value, it is possible to provide a dryer that does not require the operator A to set the hot air temperature, which is a time-consuming process.

Next, a second embodiment according to the present invention will be described. The difference between this embodiment and the first embodiment is that the hot air temperature value after switching λ is set as a target value, and the actual hot air temperature value is made to match the target value.
] The CPU 101 gradually overrides the combustion control based on the moisture content information 89 sequentially provided from the automatic moisture meter 87.

A third embodiment according to the present invention will now be described.

In this embodiment, the CPU 101 controls the second real M1.
For example, in order to correct variations in the moisture content information 89 obtained from the automatic moisture content a 187, the average value of a plurality of moisture content information 89 given within a predetermined period of time is calculated as IH.

Operate the average value as above n'? Examples of such methods include the moving average payment method and the 11I7 filter method described below. - Vertical filter method (row 41 is twisted according to the style of Gonozu Shita).

1Jsn =4Ms (n-1) 1Jsn15Ms
n: n times]
n-1): n -1 times "1 (previous) water content Msn: nth measurement (171 n' = 1.2.3... MS + = MS + That is, CPLJlol is -1 Calculate the water content determined by the water content and the heat after switching set in the first embodiment and calculate the actual heat in order to eliminate the difference. Combustion control υ11 is performed in order to gradually bring the temperature closer to the set hot air temperature curve.

A fourth embodiment according to the present invention will be explained.

In this embodiment, combustion control is performed to bring the actual hot air temperature closer to the target value, as shown in FIGS. 4 and 5 (hot air after switching as shown). 4 determined by the d1 distribution curve ■～■ after switching.
Calculate the difference between the measured moisture content and the measured moisture content, and calculate the actual hot air temperature to eliminate the difference.Each time the automatic moisture 6187 measures the moisture content, the hot air temperature is t2°C, and the fuel supply amount is t2°C. By controlling the combustion as described in 1.L, which involves making a small correction of several meters, it is possible to reduce sudden irritation and thirst. 11 ways to prevent hunting in the burner combustion system.

According to the present invention, the second hot-ray eddy current setting value is set as the target value, and the detected actual hot air temperature value is calculated based on the target value. However, by controlling the combustion to gradually moisten the difference, it is possible to remove the problems that cause grain quality deterioration, such as cracking, and to efficiently carry out drying work. However, it is possible to provide a grain dryer that can prevent the combustion state of the barb combustion system of the dryer from becoming unstable.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a grain dryer according to the first to fourth embodiments (3) of the present invention, and FIG. 2 is a block diagram of a grain dryer according to the first to fourth embodiments of the present invention. , FIG. 3 shows the first to fourth embodiments of the present invention.
A diagram showing the relationship between drying time (■) and moisture content, which is established using the hot air temperature value of the grain dryer as a parameter according to the example of
FIGS. 4 and 5 are diagrams showing a method for controlling hot air heating stones in a grain dryer according to a fourth embodiment of the present invention. 1...Grain dryer 2...Fan motor 21...Fuel lit power supply port 1 valve 69...Target hot air temperature setting 101...C[)(j
Knob 103... Memo 79...
Hot air warm stone detection sensor→No.161

Claims (1)

[Claims] Means for setting the hot air temperature according to the amount of grain to be dried in the dryer and the type of the grain, and storing a plurality of hot air temperature value data set according to the type and characteristics of the grain. The first hot air temperature setting value is set by the hot air temperature setting means when it is recognized that a predetermined time has elapsed from the start of the drying operation, the first hot air temperature setting value having a storage means and a means for detecting the actual hot air temperature in the dryer. is switched to a second hot air temperature setting value selected from the data according to the type and characteristics of the grain to be dried, and the second hot air temperature setting value is set as a target value and the target value and the detection means are 1. A grain dryer, characterized in that a calculation means is provided for calculating a difference between a detected value given by a value and a combustion control to gradually eliminate the difference.