JP2018128206A - Cereal grain dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cereal grain dryer capable of suppressing dust adhesion even when dew condensation occurs in a drying chamber.SOLUTION: A cereal grain dryer comprises: a drying chamber (5) to which cereal grain is fed from a storage chamber (2); a heat source (19) that raises temperature in the drying chamber (5); and a detecting member (17) that detects presence or absence of the cereal grain in the drying chamber (5). The cereal grain dryer can suppress dust adhesion even when dew condensation occurs in the drying chamber (5) by means of activating the heat source (19) for a predetermined period when the cereal grain is absent and executing an operation of dissolving the dew condensation in the drying chamber (5).SELECTED DRAWING: Figure 3

Description

  The present invention relates to a grain dryer.

In the grain dryer for drying the harvested grain, the technique described in Patent Document 1 below is known.
In Patent Document 1 (Japanese Patent Laid-Open No. 2006-308244), in the drying operation for drying cereals, when the outside air temperature is low and the moisture value of the cereal is high, exhaust air containing moisture from the cereal and outside air It is described that dew condensation occurs on the inner surface of the side machine wall due to the temperature difference. In the technique described in Patent Document 1, the dew that flows down along the side machine wall is blown off by the outside air sucked from the slit hole, exhausted and exhausted outside the machine.

JP 2006-308244 A

  In the grain dryer described in the said patent document 1, the countermeasure of the dew condensation inside a side machine wall is possible. However, when the outside air temperature is low or the outside air humidity is high, condensation may occur not only on the side machine wall but also on the partition wall (drying chamber) in the grain flow layer. When condensation occurs in the drying chamber, dust may adhere to the condensation and accumulate in the drying chamber. However, the technique described in Patent Document 1 cannot cope with condensation in the drying chamber.

  An object of the present invention is to suppress the adhesion of dust even when condensation occurs in a drying chamber.

The problems of the present invention are solved by the following means.
The invention according to claim 1 is a storage chamber (2) for storing grains, a drying chamber (5) to which grains are supplied from the storage chamber (2), and a heat source for raising the temperature of the drying chamber (5). (19) and a detection member (17) for detecting the presence or absence of grain in the drying chamber (5). When there is no grain, a preset heat source (19) is operated for drying. It is the grain dryer characterized by performing the operation | movement which eliminates the dew condensation of a room (5).

  Invention of Claim 2 is provided with the external temperature thermometer (SN1) which measures the temperature of the external air of a drying chamber (5), and the ventilation apparatus (13) which sends air in the said drying chamber (5), When the temperature of the outside air does not reach a preset temperature, an operation for eliminating condensation in the drying chamber (5) is executed, and when the temperature of the outside air reaches a preset temperature, the heat source The grain dryer according to claim 1, wherein a ventilation operation is performed to operate the ventilation device (13) without operating the ventilation device (13).

  Invention of Claim 3 is provided with the external air hygrometer (SN2) which measures the humidity of the external air of a drying chamber (5), and the ventilation apparatus (13) which sends air in the said drying chamber (5), When the humidity of the outside air reaches a preset humidity, an operation for eliminating the condensation in the drying chamber (5) is executed, and when the humidity of the outside air does not reach the preset humidity, the heat source The grain dryer according to claim 1 or 2, wherein a ventilation operation is performed to operate the ventilation device (13) without operating (19).

  The invention according to claim 4 is an operation for eliminating condensation in the drying chamber (5) when it is detected that there is no grain during the discharging operation of discharging the dried grain out of the grain dryer (1). The grain dryer according to any one of claims 1 to 3, wherein

  According to the first aspect of the present invention, when there is no grain, the heat source (19) is operated for a preset time period, and the operation of eliminating the condensation in the drying chamber (5) is performed, whereby the drying chamber ( 5) Even if condensation occurs in the inside, it is possible to suppress the adhesion of dust.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, when the temperature of the outside air does not reach a preset temperature, the operation of eliminating the condensation in the drying chamber (5). When the outside air temperature reaches a preset temperature, the outside air temperature is set to the outside temperature by performing the ventilation operation that does not operate the heat source (19) and operates the ventilation device (13). Accordingly, an appropriate dew condensation eliminating operation can be executed.

  According to the invention described in claim 3, in addition to the effect of the invention described in claim 1 or 2, when the humidity of the outside air reaches a preset humidity, the condensation in the drying chamber (5) is eliminated. When the outside air humidity does not reach a preset humidity, the outside air is operated by not performing the heat source (19) and operating the ventilation device (13) when the humidity of the outside air does not reach a preset humidity. An appropriate dew condensation eliminating operation can be executed according to the humidity.

  In addition to the effect of the invention according to any one of claims 1 to 3, the invention described in claim 4 eliminates condensation in the drying chamber (5) when no grain is detected during the discharging operation. By performing this operation, dew condensation after the discharge operation is completed can be prevented, and adhesion of dust can be prevented.

FIG. 1 is a perspective view of a grain dryer according to an embodiment of the present invention. FIG. 2 is a view seen from the direction of arrow II in FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 1 and shows an internal structure inside the dryer. FIG. 4 is an explanatory diagram of an operation panel of the grain dryer according to the present embodiment. FIG. 5 is a block diagram showing the control mechanism of the grain dryer of this embodiment. FIG. 6 is an explanatory diagram of a flowchart of the condensation elimination process of the embodiment. FIG. 7 is an explanatory diagram of a flowchart of the test operation process of the embodiment.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of a grain dryer according to an embodiment of the present invention.
FIG. 2 is a view seen from the direction of arrow II in FIG.
FIG. 3 is a cross-sectional view taken along line AA in FIG. 1 and shows an internal structure inside the dryer.
1-3, the grain dryer 1 of the Example of this invention is arrange | positioned in order from the upper direction in the storage chamber 2, the exhaust air chamber 3, the hot air chamber 4, and the grain collection chamber 6 in the inside dryer. . An elevator 16 is disposed outside the wall surface of the grain dryer 1. The exhaust air chamber 3 and the hot air chamber 4 may be collectively referred to as a drying chamber 5.

Between the wall 8 which partitions the exhaust air chamber 3 and the hot air chamber 4, the grain flow path 9 in which a funnel-shaped grain falls from upper direction toward the downward direction is formed, and while falling down this grain flow path 9 The grain is dried with hot air.
Accordingly, the grain in the storage chamber 2 is dried in the grain flow path 9 between the exhaust air chamber 3 and the hot air chamber 4 in the process of falling downward from the ceiling 10. At this time, the grains are easily dried by falling while spreading over the entire horizontal section in the storage chamber 2 by diffusion blades (not shown) provided on the ceiling portion 10 in the storage chamber 2.

  The dried grain is collected at the lower end of the grain flow path 9 and is collected in the grain collection room 6 via the rotary valve 38 provided at the lower end of the grain flow path 9. The lower conveyor 39 provided at the lower part of the grain dryer 1 is pulled out to the elevator 16 outside the grain dryer 1, transported to the ceiling unit 10 side of the grain dryer 1, and then by the upper spiral 23 provided on the ceiling unit 10. Then, it falls again downward from the storage chamber 2.

Moreover, the sticking sensor 12 is arrange | positioned in the appropriate place in the storage chamber 2, and the sticking grain amount can be detected suitably.
In addition, exhaust air is discharged | emitted from the exhaust duct 14 outside from the exhaust chamber 3 of the grain dryer 1 with the fan 13 (refer FIG. 2) which act | operates with the motor which is not shown in figure. Further, an automatic moisture meter 17 as an example of a detection member is disposed at an appropriate position of the elevator 16, and a combustion burner 19 is provided as an example of a heat source for supplying hot air to the hot air chamber 4 next to the elevator 16. A controller (control device) 50 for controlling the drive of the grain dryer 1 is provided above the above.

  Further, a dust remover 24 is disposed on the upper spiral basket 22 that covers the upper spiral 23 disposed on the ceiling 10 of the grain dryer 1. Dust in the grain dryer 1 and the upper spiral basket 22 is sucked by the dust discharger 24 from the suction duct 26 and discharged to the outside from the dust discharge duct 25.

FIG. 4 is an explanatory diagram of an operation panel of the grain dryer according to the present embodiment.
In FIG. 4, the operation panel 32 of the grain dryer 1 according to the present embodiment has a grain insertion button 33a, a ventilation button 33b, a drying button 33c, a discharge button 33d, and a stop button 33e arranged in parallel. Each driving operation can be performed by ~ 33e. The hot air temperature, moisture, and remaining time can be displayed on the liquid crystal screen 34, and the emergency stop button 35 can be used to stop the dryer.
Further, on the left side of the operation panel 32, a heat recycling lamp 41a that displays the amount of waste heat recovered, a moisture variation lamp 41b that displays variation in grain moisture based on the moisture measured by the moisture meter, and a moisture meter. An immature rice lamp 41c is provided to display the amount of immature rice mixed based on the water content.

  On the right side of the operation panel 32, a button 45a for shifting to a mode for setting a drying pause time, a button 45b for shifting to a mode for setting a timer, a button 45c for shifting to a mode for setting a sticking amount, and a moisture amount There are provided a button 45d for shifting to a mode for performing the setting, an increase button 45e and a decrease button 45f for increasing and decreasing the mode in each mode, respectively. The set values by the buttons 45 a to 45 f are configured to be displayed on the liquid crystal screen 34.

  Further, on the right side of the operation panel 32, a grain setting button 46a for setting the grain type, a grain setting display lamp 46b for displaying the type of grain being set, and a drying speed button 46c for setting the drying speed. A drying setting display lamp 46d for displaying the drying speed being set is provided.

FIG. 5 is a block diagram showing the control mechanism of the grain dryer of this embodiment.
In the functional block diagram of FIG. 5, illustrations are omitted for configurations not related to the description of the present invention.
In FIG. 5, the control device 50 of the embodiment has an input / output interface I / O that performs input / output of signals with the outside. In addition, the control device 50 includes a memory 47 including a ROM: read-only memory in which a program and information for performing necessary processing are stored, and a RAM: random access memory in which necessary data is temporarily stored. Have. The control device 50 includes a central processing unit (CPU) that performs processing according to a program stored in the memory 47. Therefore, the control apparatus 50 of Example 1 is comprised by the small information processing apparatus, what is called a microcomputer. Therefore, the control device 50 can realize various functions by executing a program stored in a ROM or the like.

In the control device 50 of the embodiment, detection signals from the automatic moisture meter 17, the outside air thermometer SN1, and the outside air hygrometer SN2, and inputs from various buttons 33a to 33e, 35, 45a to 45f, 46a and 46c on the operation panel 32 are provided. A signal is input.
Further, the control device 50 outputs control signals to controlled members such as the fan 13, the elevator 16, the combustion burner 19, the upper spiral 23, the dust collector 24, the diffusion blades, the rotary valve 38, and the lower spiral 39.

  The control device 50 according to the embodiment includes the elevator button 16, the combustion burner 19, and the upper spiral 23 according to inputs of the tension button 33 a, the ventilation button 33 b, the drying button 33 c, the discharge button 33 d, the stop button 33 e, and the emergency stop button 35. Then, the dust remover 24, the diffusion blade, the fan 13, the rotary valve 38, the lower spiral 39, and the like are driven or stopped, and the filling operation, the ventilation operation, the drying operation, the discharge operation, the operation stop, and the emergency stop are performed.

In addition, as an example, the control device 50 of the embodiment is configured such that the condensation elimination operation (condensation elimination mode) is selected when the drying button 33c and the discharge button 33d are simultaneously pressed. Then, when the drying button 33c is input in a state where the condensation elimination operation is selected, the temperature of the outside air (outside the grain dryer 1) is lower than the set temperature, or the humidity of the outside air is higher than the set humidity. In the case of moisture, the control device 50 performs a dew condensation eliminating operation that operates the fan 13 and also operates the spirals 23 and 39 while heating with the combustion burner 19.
Further, when the drying button 33c is input in a state where the condensation elimination operation is selected, if the outside air temperature is higher than the set temperature and the outside air humidity is lower than the set humidity, the control device 50 displays the combustion burner. A ventilation operation is performed in which the fan 13 is operated and the spirals 23, 39 and the like are also operated without operating the circuit 19.

In the control device 50 of the embodiment, the condensation elimination operation and the ventilation operation are automatically terminated after a preset time has elapsed.
Moreover, in the control apparatus 50 of an Example, the combustion burner 19 is intermittently operated at the time of dew condensation elimination driving | operation. For example, the combustion burner 19 is operated (combusted) for 1 minute, then stopped for 1 minute, then operated for 1 minute, and so on, repeatedly.

Moreover, the control apparatus 50 of an Example is comprised so that a trial run (trial run mode) may be selected as an example, when the extension button 33a and the dry button 33c are pushed simultaneously. The trial operation mode is basically executed to check whether the grain dryer 1 operates normally in the absence of grain, as in the case where the combustion burner 19 and the like are replaced by maintenance. Mode.
In the grain dryer 1 of the embodiment, when the drying button 33c is input in the state where the trial operation mode is selected, if there is no grain, the control device 50 operates the combustion burner 19 with the set combustion amount. However, a dry test operation for operating the fan 13, the spirals 23, 39, etc. is executed. Then, when the stop button 33e is input, the drying test operation is terminated. Note that the presence or absence of grain can be determined based on the detection result of the automatic moisture meter 17.

  Further, when the drying button 33c is input in the state where the trial operation mode is selected, if there is a grain and the moisture value is equal to or higher than the set value, the combustion amount is lowered below the set value and the combustion burner 19 is operated. Then, a dry test operation for operating the fan 13 and the spirals 23 and 39 is executed. Then, when the stop button 33e is input, the drying test operation is terminated. When reducing the combustion amount, for example, it is possible to lower it by one step from the set value. However, the present invention is not limited to this, and it is not limited to this. A configuration in which the intermediate combustion amount is forcibly set only when the amount is greater than or equal to the amount may be employed. In addition, when the drying button 33c is input in a state where the trial operation mode is selected, if there is grain and the moisture value is less than the setting, the control device 50 does not perform the trial operation (stops the trial operation).

(Explanation of flow chart of embodiment)
Next, the flow of control in the grain dryer 1 of the embodiment will be described with reference to a flow chart, a so-called flowchart.

(Explanation of flowchart for condensation elimination processing)
FIG. 6 is an explanatory diagram of a flowchart of the condensation elimination process of the embodiment.
The processing of each step ST in the flowchart of FIG. 6 is performed according to a program stored in the control device 50. Further, this process is executed in parallel with other various processes of the grain dryer 1.
The flowchart shown in FIG. 6 is started when the grain dryer 1 is turned on.

In ST1 of FIG. 6, it is determined whether or not an input for selecting a dew condensation elimination mode has been made. That is, it is determined whether or not the drying button 33c and the discharge button 33d are simultaneously pressed on the operation panel 32. If yes (Y), the process proceeds to ST2. If no (N), the process proceeds to ST3.
In ST2, it is determined whether or not an input for starting the condensation elimination mode, that is, an input of the drying button 33c has been made. If yes (Y), the process proceeds to ST5, and if no (N), ST2 is repeated.

In ST3, it is determined whether or not the grain dryer 1 is in a drying operation or a discharging operation. If yes (Y), the process proceeds to ST4. If no (N), the process returns to ST1.
In ST4, it is determined whether or not no grain is detected. That is, it is determined whether or not the drying operation and the discharging operation are completed. If yes (Y), the process proceeds to ST5, and if no (N), ST4 is repeated.
In ST5, ventilation circulation operation is started. That is, the spirals 23, 39 and the like are operated while ventilating with the fan 13 without operating the combustion burner 19. Then, the process proceeds to ST6.

In ST6, it is determined whether or not the presence of grain is detected. If yes (Y), the process proceeds to ST7. If no (N), the process proceeds to ST8.
In ST7, the ventilation circulation operation is stopped. Then, the condensation elimination mode is terminated and the process returns to ST1.
In ST8, it is determined whether or not the outside air temperature is equal to or higher than a set temperature (10 ° C. as an example). If yes (Y), the process proceeds to ST9, and if no (N), the process proceeds to ST10.
In ST9, it is determined whether or not the outside air humidity is equal to or higher than a set humidity (80% as an example). If yes (Y), the process proceeds to ST10. If no (N), the process proceeds to ST11.

In ST10, a drying operation (condensation elimination operation) is executed for a set time. That is, ventilation is performed by the fan 13 while the combustion burner 19 is operated intermittently. Then, the process proceeds to ST12.
In ST11, the ventilation operation (ventilation circulation operation) is executed for a set time. Then, the process proceeds to ST12.
In ST12, the operation of the grain dryer 1 is stopped. Then, the condensation elimination mode is terminated and the process returns to ST1.

(Explanation of flow chart of test run process)
FIG. 7 is an explanatory diagram of a flowchart of the test operation process of the embodiment.
The processing of each step ST in the flowchart of FIG. 7 is performed according to a program stored in the control device 50. Further, this process is executed in parallel with other various processes of the grain dryer 1.
The flowchart shown in FIG. 7 is started when the grain dryer 1 is turned on.

In ST21 of FIG. 7, it is determined whether or not an input for selecting a trial operation mode has been made. That is, it is determined whether or not the sticking button 33a and the drying button 33c are simultaneously pressed on the operation panel 32. If yes (Y), the process proceeds to ST22, and if no (N), ST21 is repeated.
In ST22, it is determined whether or not a combustion amount has been set. That is, it is determined whether or not the setting of the drying speed (combustion amount per unit time) has been changed by the input of the drying speed button 46c. In addition, the combustion amount of the combustion burner 19 is set larger as the drying speed is set higher. If yes (Y), the process proceeds to ST23, and, if no (N), the process proceeds to ST24.
In ST23, the set value of the combustion amount is stored and displayed on the drying setting display lamp 46d. Then, the process returns to ST22.

In ST24, it is determined whether or not the drying button 33c has been input. Then, the process proceeds to ST25.
In ST25, it is determined whether or not the presence of grain has been detected. If no (N), the process proceeds to ST26, and if yes (Y), the process proceeds to ST28.
In ST26, the drying operation is executed while operating the combustion burner 19 with the set combustion amount. Then, the process proceeds to ST27.
In ST27, it is determined whether or not the stop button 33e has been input. If no (N), the process returns to ST26, and if yes (Y), the process proceeds to ST31.

In ST28, it is determined whether or not the moisture value of the grain detected by the automatic moisture meter 17 is equal to or greater than a set value. If yes (Y), the process proceeds to ST29, and, if no (N), the process proceeds to ST31.
In ST29, the drying operation is executed while operating the combustion burner 19 by lowering the combustion amount below the set value. Then, the process proceeds to ST30.
In ST30, it is determined whether or not the stop button 33e is input. If no (N), the process returns to ST28, and if yes (Y), the process proceeds to ST31.
In ST31, the drying operation is stopped. Then, the trial operation mode is terminated, and the process returns to ST21.

  In the grain dryer 1 having the above-described configuration, when the input for selecting the condensation elimination mode is made, or when the drying and discharging of the grains are finished, the grain dryer 1 shifts to the condensation elimination mode. In the condensation elimination mode, at the time of low temperature or high humidity, a drying operation, that is, an operation of ventilating while operating the combustion burner 19 is performed. Therefore, even if condensation occurs on the inner surfaces of the drying chamber 5 and the cereal collecting chamber 6, the air is ventilated while being dried by the heat of the combustion burner 19. Therefore, even if condensation occurs in the drying chamber 5 or the like, it can be eliminated, and dust can be prevented from adhering and accumulating on the inner surface of the drying chamber 5 or the like. In addition, in the Example, although the structure which performs a dew condensation elimination driving | operation at the time of low temperature or high humidity was illustrated, it is not limited to this. For example, conditions for performing the condensation elimination operation, such as performing the condensation elimination operation only at a low temperature and high humidity, can be appropriately changed according to the design, specifications, and the like.

Moreover, in the grain dryer 1 of an Example, since there is little dew condensation at the time of high temperature and low humidity, dew condensation is eliminated by ventilation operation and adhesion and accumulation of dust are prevented. Therefore, even when the condensation is small, energy can be saved while eliminating the condensation. Therefore, in the grain dryer 1 of an Example, it can operate | move appropriately according to external temperature and external air humidity with the case where there is much dew condensation and the case where there is little.
Furthermore, in the grain dryer 1 of the embodiment, the condensation elimination operation (drying operation or ventilation operation) is executed for a set time, so that it is possible to prevent forgetting to stop compared to when the condensation elimination operation is manually stopped. It is possible to prevent wasteful consumption of energy due to wasteful heating and accidents such as fire due to overheating.

Moreover, in the grain dryer 1 of an Example, dew condensation elimination mode is performed in the state without grain. When the condensation elimination mode is executed in a state where there is a grain, the grain may be overdried, but in the embodiment, overdrying of the grain is prevented.
Further, in the grain dryer 1 of the embodiment, the combustion burner 19 and the fan 13 are intermittently operated in the condensation elimination mode. Therefore, compared with the case where the combustion burner 19 and the fan 13 are continuously operated, it is expected that preheating can be used and the influence of air current stagnation and the like is reduced, and efficient dew condensation can be expected.

  In the grain dryer 1 of the embodiment, the condensation elimination mode is automatically executed after the grain is dried and discharged. If you do not perform condensation elimination after discharging, there is a risk of dust adhering to the condensation, and even if the condensation elimination mode is performed before the next grain drying operation starts, the dust will remain attached and the grain flow will be reduced. There is a risk that it will get worse or dust particles will be mixed with the discharged grain. Therefore, in the grain dryer 1 of an Example, compared with the case where dew condensation elimination mode is performed before the next grain drying driving | operation, dust adhesion can be eliminated efficiently.

  In the grain dryer 1 of the embodiment, the configuration in which the drying button 33c and the discharge button 33d are pressed at the same time when entering the condensation elimination mode is illustrated, but the present invention is not limited to this. It is also possible to provide a dedicated button for the condensation elimination mode on the operation panel 32.

  In the grain dryer 1 of the embodiment, when the trial operation mode is executed, if there is no grain, the drying operation (trial operation) is executed with the set combustion amount. A drying operation (trial operation) is performed with a combustion amount lower than the combustion amount. In the conventional grain dryer, the test run is performed in the absence of grains, and the test run is not performed in the presence of grains. However, for example, when the combustion burner 19 fails and is replaced during the grain drying operation, it may be difficult to put out all the grains that are being dried. However, when there is a grain and a trial run is performed for a long time with a high combustion amount, the grain temperature rises and there is a risk of ignition. On the other hand, in the grain dryer 1 of an Example, when there exists a grain, it can carry out a test run safely even when the grain is contained by performing with the combustion amount lower than preset temperature.

  In the grain dryer 1 according to the embodiment, the configuration in which the trial operation is performed by reducing the combustion amount when there is grain is illustrated, but the present invention is not limited thereto. For example, a sensor for detecting the temperature of the exhaust air is provided, and while the exhaust air temperature is less than a set value (for example, 50 ° C.), a test operation is performed according to the set value of the combustion amount, and the exhaust air temperature is set. If the value exceeds the value, it is possible to adopt a configuration in which the trial operation is performed with the combustion amount lowered.

Further, in the grain dryer 1 of the embodiment, when there is grain in the trial operation mode, in the state where the moisture value is high, the grain is less likely to ignite and cause a fire, so the trial operation is continued and the moisture value is increased. When it is low, the commissioning is stopped in consideration of the risk of fire. Therefore, the occurrence of fire can be prevented. It is also desirable to add a configuration for notifying the user with a buzzer or a warning display at low moisture.
In addition, it is not limited to the case where the trial run is stopped based only on the moisture value. For example, it is possible to detect the exhaust air temperature and stop the trial run when the exhaust air temperature becomes high. If there is no grain, there is little problem even if it automatically shifts to dry operation after the trial run, but if there is grain, there is a risk of fire, so do not automatically shift to dry operation after the trial run. It is desirable to configure.

  In the grain dryer 1 of the embodiment, when the combustion burner 19 is used, for example, a burner failure is caused by providing a sensor (such as a frame rod) in the vicinity of the burner and generating an ignition signal once at the start of drying. If an undetected ignition mistake is repeated three times or more and the drying button 33c is further pressed, an error is displayed on the operation panel 32 without ignition. It is set not to enter the ignition process. If ignition mistakes are repeated many times, fuel spills in the vicinity of the burner, and if ignited as it is, the spilled fuel may catch fire and burn the burner part. Therefore, when repeated ignition mistakes occur, a burning accident can be prevented by not performing ignition.

For example, if the error history is initialized, the power of the grain dryer 1 is turned off once, or if a predetermined time (for example, 30 minutes) has not passed, the user is prevented from entering the ignition process. It is possible to call attention.
Further, in the grain dryer 1, it is desirable to display the abnormality because the safety device is not likely to work even if abnormal heating is performed if the contact of the thermostat is confirmed with a sensor when the power is turned on and the sensor is off. . Similarly, when the power is turned on, check the voltage of the flame rod (a sensor that can detect when the fire is on and the voltage changes). It is desirable to display an abnormality because there is a possibility that ignition may not be detected. Even in these cases, it is desirable to be able to perform the tension operation and the discharge operation without operating the heat source, and the delay in the work plan can be reduced.

2 Storage chamber 5 Drying chamber 13 Ventilation device 17 Detection member 19 Heat source SN1 Outside air thermometer SN2 Outside air hygrometer

Claims (4)

A storage chamber (2) for storing grain;
A drying chamber (5) to which grain is supplied from the storage chamber (2);
A heat source (19) for raising the temperature of the drying chamber (5);
A detection member (17) for detecting the presence or absence of grains in the drying chamber (5);
With
A grain dryer characterized in that, when there is no grain, a heat source (19) for a preset time is operated to eliminate condensation in the drying chamber (5). An outside air thermometer (SN1) for measuring the temperature of the outside air in the drying chamber (5);
A ventilation device (13) for sending air into the drying chamber (5);
With
When the temperature of the outside air does not reach a preset temperature, an operation for eliminating condensation in the drying chamber (5) is performed,
The grain dryer according to claim 1, wherein when the temperature of the outside air reaches a preset temperature, a ventilation operation is performed in which the heat source is not activated and the ventilation device (13) is activated. . An outside air hygrometer (SN2) for measuring the humidity of the outside air in the drying chamber (5);
A ventilation device (13) for sending air into the drying chamber (5);
With
When the humidity of the outside air reaches a preset humidity, an operation for eliminating condensation in the drying chamber (5) is performed,
The ventilating operation for operating the ventilation device (13) without operating the heat source (19) when the humidity of the outside air does not reach a preset humidity is performed. As described in the grain dryer. An operation for eliminating condensation in the drying chamber (5) is executed when no grain is detected during the discharging operation of discharging the dried grain out of the grain dryer (1). Item 4. The grain dryer according to any one of Items 1 to 3.

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