JP2006038407A - Grain drier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform appropriate handling after power recovery by determining whether a grain drier or the like is stopped by power failure in power supply connection. <P>SOLUTION: In the grain drier, charge grains are circulated and moved so that they travel from an upside reservoir chamber to a downside grain collecting chamber through a grain flow-down passage and are returned to the upside reservoir chamber by an elevator. A far-infrared radiator is mounted in a hot blast chamber formed in the body, and one end of the far-infrared radiator is connected to a burner, and air can be passed through the grain flow-down passage by action of a suction fan. In current carrying to the drier, respective detected temperature value of an outside air temperature sensor and a hot blast temperature sensor arranged in the hot blast chamber for mounting the far-infrared radiator are inputted, and a control part drives the suction fan when the detection temperature difference is a predetermined value or more. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a grain dryer, and more particularly, to a process when a power failure is restored in a dryer provided with a far-infrared radiator.

In a grain dryer, the form equipped with a far-infrared radiator has the effect of maintaining good taste while increasing the drying speed by allowing the far-infrared radiation to act on the inside of the grain to accelerate drying. . By the way, since a far-infrared radiator maintains a high temperature during drying, if the movement of the grain in the dryer stops for some reason, the far-infrared radiation is continuously received, so that the quality of the grain is impaired. For this reason, if the power supply is cut off due to a power failure or any other cause and the circulation of the grains stops, the grains staying in the grain take-out tank remain stagnant and continue to be irradiated with far-infrared rays from the far-infrared radiator. May fall into an overdried state or burn out, and there is an open / close plate on the inclined plate where the grain flows down, and measures are taken to open and recover the grain when the grain is stopped (Patent Literature) 1).
JP 2003-176984 A

  However, the configuration shown in Patent Document 1 is excellent in that it is avoided from the direct influence of far-infrared irradiation, but there is no consideration for processing when the power is restored from a power failure, and it is impossible to continue operation. When the drying is interrupted due to a power failure, the overdrying state is removed as soon as possible. On the other hand, when the power is restored from the power failure in a short time, it is necessary to continue drying.

  The present invention attempts to perform appropriate processing after recovery from a power failure by determining whether the power supply is stopped due to a power failure.

For this reason, this invention took the following technical means.
The invention according to claim 1 is configured to circulate and transfer stretched grains from the upper storage chamber to the lower cereal collection chamber via the grain flow-down passage and to return to the storage chamber by an elevator. In the grain dryer configured to be equipped with a far-infrared radiator in the hot air chamber to be formed and connected to one end of the far-infrared radiator to a burner, and to be able to ventilate the grain flow passage by the action of a blower fan, When the dryer is energized, the temperature detection values of the hot air temperature sensor disposed in the hot air chamber to which the outside air temperature sensor and the far-infrared radiator are mounted are input, and air is blown when the detected temperature difference is equal to or greater than a predetermined value. The control part which drives a fan is comprised.

  If comprised in this way, based on the difference of the outside temperature at the time of power supply connection and hot air temperature, it can determine with the operation interruption by a power failure, and can automatically enter into the ventilation operation by the operation of a ventilation fan based on this determination result .

  According to the second aspect of the present invention, in the configuration of the first aspect, the ventilation operation is not entered when the difference between the detected value of the outside air temperature sensor and the hot air temperature sensor when the power is connected is equal to or less than a predetermined value. If the detected temperature difference is greater than or equal to the predetermined value, it will be judged as a power failure, but if the temperature of the far-infrared radiator has dropped for a long time, the automatic ventilation operation will not be entered and the operator's It is left to judgment.

  The invention according to claim 3 is configured to circulate and transfer the stretched grain from the upper storage chamber to the lower cereal collection chamber via the grain flow-down passage and to return to the storage chamber by an elevator. In the grain dryer configured to be equipped with a far-infrared radiator in the hot air chamber to be formed and connected to one end of the far-infrared radiator to a burner, and to allow ventilation through the action of a blower fan in the grain flow path, A grain moisture meter for detecting the moisture value of the circulating kernel is provided, and the detected value of the moisture meter is stored in a nonvolatile memory. By calling this moisture value when the power supply is connected, it is determined that the drying operation is interrupted due to a power failure when the moisture value is equal to or greater than a predetermined value, and the ventilation fan is driven to enter the ventilation operation.

  According to the first aspect of the present invention, it can be determined that the operation is interrupted due to a power failure based on the difference between the outside air temperature and the hot air temperature when the power is connected, and the ventilation operation based on the operation of the blower fan is automatically entered based on the determination result. Therefore, the grain that is stopped by the power outage and overheated, especially the grain close to the far-infrared radiator, is cooled by ventilation to avoid unexpected loss.

  In the invention according to claim 2, when the detected temperature difference is greater than or equal to a predetermined value, it is determined that the power failure has occurred. However, when the temperature of the far-infrared radiator has decreased for a long time, It is intended not to enter into automatic ventilation operation. The temperature of the far-infrared radiator has dropped rapidly or was originally low, so it is judged that ventilation is not necessary, and wasteful loss of power can be prevented. it can.

  The invention according to claim 3 calls the moisture value of the non-volatile memory when the power is connected. When the moisture value is equal to or higher than the predetermined value, it is determined that the drying operation is interrupted due to a power failure, and the ventilation fan is driven to operate the ventilation. Therefore, grains that are stopped by a power outage and overheated, especially those near the far-infrared radiator, are cooled by ventilation to avoid unforeseen losses.

An embodiment of the present invention will be described below with reference to the drawings.
First, the overall configuration of the grain dryer will be described. Reference numeral 1 denotes a machine frame of a grain dryer, in which a storage tank 2, a drying room 3, and a grain collection room 4 are stacked in this order. In the drying chamber 3, inclined grain flow passages 5, 5 are formed with the air-permeable mesh bodies 5 a, 5 a facing left and right, and a pair of left and right grain flow passages 5, 5 are formed in a V shape in front view. is doing. The upper side of each grain flow passage 5, 5 further forms a diamond-shaped space inside the left and right grain flow passages 5, 5 so as to form a V shape, and this space is formed in the hot air chamber 6. . In addition, the lower half part of the space forming body having a rhombus cross section is constituted by a ventilation net, and the V-shaped upper half part is constituted by a non-breathable plate material.

  A feeding valve 7 is provided below the left and right junctions at the lower ends of the grain flow passages 5 and 5. The feeding valve 7 is formed in a cylindrical body having a circular cross section. The feeding valve 7 receives grains from an inlet port formed in a part of the outer periphery with forward rotation and reverse rotation, and the lower cereal collection chamber 4 according to forward and reverse rotation. It is the structure which makes it fall.

  In the hot air chamber 6 formed in the rhombus space inside the drying chamber 3, a far-infrared radiator 10 is formed in a polygonal cylindrical shape and has a length extending from the front side wall to the rear side wall of the drying chamber 3. And are detachably fixed to the front and rear surfaces of the machine wall. The far-infrared radiator 10 has a substantially hexagonal cross section that connects the inverted V-shape of the upper portion and the V-shape of the lower portion with a short vertical portion so as to correspond to the cross-sectional shape of the rhombus space portion. It is configured in a shape, and slit-like openings 11 and 12 are formed on the upper side and the lower side. In addition, the upper side opening 11 is formed over the predetermined range in the front side part of the body, and the lower side opening 12 is formed over the front and back.

  The front side of the machine body communicates with a hot air chamber 6 provided with a burner 13 provided in a burner wind tunnel 14. Further, a suction type blower fan 15 is provided on the rear side of the machine body, and by the wind of the blower fan 15, the hot air chamber 6 that is a rhombus space passes through the grain flow passages 5, 5 and passes through the grain flow passages 5, 5. It is comprised so that it may ventilate toward the ventilation path 16,16 formed in the outer side.

The cereal collection chamber 4 is provided with a lower conveying device 25 having a transfer spiral at the center thereof, and the grain fed from the feeding valve 7 is received by the lower conveying device 25 and transferred to, for example, the front side of the machine body. The elevator 18 is provided on the front side of the machine body, the bucket is provided inside, and the grain from the lower transport device 25 is scooped up and cerealed at the start end of the upper transport device 31 provided on the upper ceiling. . A hanging shaft 32 is provided at the center of the ceiling on the terminal end side of the upper conveying device 31 provided with a transfer spiral, and a rotating diffusion plate 33 is attached to the hanging shaft 32.
The left and right half of the far-infrared radiator 10 is attached to the front and rear walls with bolts and nuts attached to the front wall with a locking tool 26 that straddles the front upper part of the left and right half. The front and rear walls are respectively detachably fixed to the front and rear walls by means of locking members 27 and 27 that are provided independently on the front lower portion and the rear upper and lower portions of the left and right half portions.

  The far-infrared radiator 10 is configured to receive hot air from a burner 13 disposed in front of the dryer on the inlet side. That is, the burner 13 is a vaporization-type burner, and includes a rotary vaporization cylinder 13b around the horizontal axis at the center of the front-facing combustion disc 13a, and fuel ejected from a fuel nozzle (not shown) provided inside the vaporization cylinder 13b. Is configured to continue combustion while being vaporized by a vaporizing cylinder 13b that receives and heats a combustion flame and is ejected from the combustion disk 13a.

  The vaporizing burner 13 is mounted as follows. The blower cylinder 13d is supported by the substrate 23 with a support cylinder 13c having a rectangular cross section. An igniter 13e transformer 13f and a fuel pump 13g for connecting the fuel nozzle are mounted on the substrate 23 on the left and right of the support cylinder 13c, and an outside air inlet 13h and a front surface are provided on the front side of the support cylinder 13c. A guide 13i formed at 13h is provided. 13j is a wiring part and 13k is a fuel supply pipe.

  A blower duct 13l connected to the outside air introduction port 13h and communicating with the support cylinder 13c is provided on the back surface side of the substrate 23, and the outside air from the introduction port 13h is brought into the blower cylinder 13d by the rotation of the air conditioning fan 13m. Configure to supply. 13n is a wind fan motor.

  As shown in FIG. 5, the control box 40a is mounted on the upper surface of the burner wind tunnel 14 with a detachable bolt or the like. The control box 40a is provided with a controller cover 40b so as to be detachable so as to cover the upper surface, the left and right surfaces, and the rear space. In addition, a front cover 36 in which ventilation holes 36a are appropriately formed is detachably provided on the front side of the wind tunnel 14. The front cover 36 is formed in a frame shape having an opening on the operation panel 41 of the control box 40a, and is covered by a single cover plate member.

  The burner 13 in the burner wind tunnel 14 communicates with the entrance of the far-infrared radiator 10. In other words, the burner wind tunnel 14 having a quadrangular cross section located outside the airframe front side wall 3a is mounted, and one end of the far-infrared radiator 10 is mounted inside the front side wall 3a, while the guide duct 28 is mounted. . The guide duct 28 is formed in a short cylindrical body having a substantially rectangular cross section in the introduction port 3b formed in the front side wall 3a, and is attached to the starting end side portion of the far-infrared radiator 10 in an exterior state. . Therefore, while the combustion hot air by the burner mainly enters the inside from the front surface of the far-infrared radiator 10, the outside air introduced into the burner wind tunnel 14 passes the outer periphery of the far-infrared radiator 10 along the inner periphery of the guide duct 28. It is a structure that blows through.

  The outside air introduced into the burner wind tunnel 14 functions as a secondary air supply when the burner 13 constitutes a vaporization type burner and enters the hot air chamber 6 as described above to suppress the rise of the hot air temperature. Is provided.

  By the way, when the burner combustion hot air enters the far-infrared radiator 10 and is guided rearward as it is, the temperature near the upper part on the inlet side tends to be low. In order to correct this, the slit-shaped opening 11 is formed as described above. Therefore, since the introduction of the outside air into this portion further reduces the temperature, the shielding plates 29 and 29 are disposed on the outer peripheral portion of the far-infrared radiator 10 on the rear side of the guide duct 28 to block the introduction of the outside air. It is provided so that it cannot act.

  If comprised in this way, the temperature rise by the opening 11 of the front side part of the far-infrared radiator 10 and the suppression of outside air introduction by the guide duct 28 combine, and the temperature rise of the hot air chamber 6 upper part near the burner 13 is increased. It is possible to promote and equalize so that the temperature distribution of the entire hot air chamber 6 falls within an appropriate range.

  Further, as described above, a dryer control box 40a having a built-in microcomputer (control unit) 40 is provided on the front surface of the burner wind tunnel 14 (FIG. 5). An operation panel 41 of the control box 40a is provided in front of the burner wind tunnel 14. The operation panel 41 includes a tension switch 42, a ventilation switch 43, a drying switch 44, a discharge switch 45, and a stop switch 46. The switch group is used to switch to various operation modes and to stop the operation. Moreover, if the emergency switch 47 is provided and this emergency switch 47 is operated, the whole body operation part can be stopped substantially simultaneously.

  In addition to these switches 42 to 47, a tension amount setting switch 48 for setting the tension amount, a moisture setting switch 49 for setting the final finishing moisture value, and a drying setting switch 50 (drying speed in the case of drought drying) Is set to fast, normal, and slow, and in the case of other grain drying, for example, a drying speed set in advance in association with varieties such as wheat and barley is set. Furthermore, timer increase / decrease switches 51 and 52 are provided for drying the finished product according to the processing time without depending on the moisture value.

  The moisture sensor 53 employs a single-grain type, measures the moisture meter output in units of a predetermined number of particles every predetermined time, averages the detection results for a predetermined number of times, calculates an average moisture value, and displays the operation panel 41 In this configuration, the detected hot air temperature and the like are replaced with each other in the unit 54. In addition, the control unit 40 is configured to be able to determine the variation in moisture from the moisture value of one grain or to determine the number of immature grains, and these are displayed by the three LEDs 55 and 56.

  In addition to inputting operation mode information and the like from the switch on the operation panel 41, the control unit 40 receives various analog and digital sensors, for example, detection information from the hot air temperature sensor 57 and the outside air temperature sensor 58, and load current detection information from the circulation system motor. Configured to input. Further, on the output side of the control unit 40, the driving output of the common fan / circulatory system motor 59 is connected to the blower fan 15 and the circulation system that controls the circulation of the grains composed of the elevator 18 and the upper and lower conveying devices 25, 31. There are an output of the feed valve motor 60, a combustion system output such as controlling the fuel supply amount of the vaporizing burner 13 and controlling the rotation speed of the burner fan, and a display output of the above contents.

  The controller 40 has the following functions. That is, the moisture value calculated based on the measurement data from the moisture sensor 53 is sequentially input and stored in the nonvolatile memory 61 connected to the control unit 40 (S1 to S4), and each time a new moisture value is input. It is supposed to be rewritten (S5). The moisture value rewritten in this way is configured to be cleared by a drying end signal or a grain discharge switch operation, and is configured not to be left at the next drying when the drying operation is normally completed. Therefore, the moisture value data of the nonvolatile memory 61 is called every time the power supply is connected (S6). When there is data in the memory 61 (S6), the drying is interrupted due to a power failure, and the automatic ventilation operation is started. In the automatic ventilation operation, the blower fan 15 is rotated to turn on the output of the upper and lower transport devices 25 and 31 and the grain circulation system motor 59 of the elevator 18 (S8) and to drive the feeding valve motor 60. (S9) In the illustrated example, the blower fan 15 motor and the drive motor for the grain circulation system are made common, and the feeding valve motor with forward and reverse rotation is made independent. After the ventilation operation as described above is continued for a predetermined time, the burner 13 is ignited to restart the drying operation (FIG. 8).

Next, the operation of the above configuration will be described.
The grain thrown into the tension hopper (not shown) is tensioned into the storage tank 2 via the elevator 17 and the upper transport device 32 that are driven by turning on the tension switch 42. When the squeezing of the grain is completed, the process proceeds to the drying operation. In the previous stage, the setting of the grain type and the desired dry finish moisture value are set by the moisture setting switch 49 and the drying setting switch 50.

  When the drying switch 44 is turned on after the setting operation is completed, the elevator 17, the upper / lower transport devices 25 and 31, the feeding valve 7 and the like are started to be driven, and the burner 13 is also driven so that the hot air flows into the drying chamber 3. It is supplied toward the entrance of the hot air chamber 6 which is a rhombus space.

  Here, the flame of the burner is hot-aired by the rotation of the blower fan 15 and flows into the far-infrared radiator 10 while being mixed with the outside air appropriately introduced, and heated to the upper and lower parts while heating the far-infrared radiator 10. It flows out of the far-infrared radiator 10 through the formed slit-shaped openings 11 and 12. At that time, far-infrared rays are emitted from the surface of the far-infrared radiator 10 by the heating of the far-infrared radiator 10, and both the thermal radiation and the hot air act on the grains flowing down through the flow-down passages 5 and 5, Moisture transfer inside the grain is promoted by radiant heat and hot air by infrared rays, and an efficient drying action is performed along with the water removing action by the hot air.

  The introduced outside air that enters the burner wind tunnel 14 and circulates around the outer periphery of the burner 13 enters the hot air chamber 6 from the front side wall 3 a after performing the function of supplying secondary air for burner combustion, but along the hot air duct 28. Circulates the outer periphery of the far-infrared radiator 10 and suppresses the temperature rise at the inlet of the hot air chamber 6. In addition, by providing the shielding plates 29 and 29, the outside air circulation is blocked by the shielding plates 29 and 29, and the temperature drop is suppressed.

  Far-infrared radiation and hot air are dried over the grain flow passages 5 and 5, and the hot air passing through the grain flow passages 5 and 5 is exhausted through the exhaust chambers 16 and 16. The grain dried in the drying chamber 3 is returned again to the storage tank 2 via the lower conveying device 25, the elevator 17 and the upper transfer spiral 31 of the cereal collecting chamber 4, and undergoes a tempering action. Such a process is repeated and drying is completed when a predetermined moisture value is reached.

  During the above drying operation, the calculated moisture value for each moisture measurement by the moisture sensor 53 at predetermined time intervals is written and stored in the nonvolatile memory 61. When the operation of the dryer is interrupted due to a power failure, and then returns to the energized state, the non-volatile memory 61 is called to check whether there is any moisture value. The blower / circulation motor 59 is driven, and the feed valve motor 60 is also driven and output. As a result, the dryer enters a so-called ventilated operation state, and the grain can be cooled by the outside air draft while immediately exhausting the hot air inside, thereby preventing the grain heating. Moreover, after continuing the ventilation operation for a predetermined time, it shifts to the original drying operation.

  FIG. 9 uses a temperature sensor as a power failure determination means for determining whether or not a stop due to a power failure. That is, each detected value is compared with the outside air temperature sensor 57 provided in the upper corner of the burner wind tunnel 14 and the hot air temperature sensor 58 provided in the hot air chamber 6 and provided in the range of the thermal influence of the far-infrared radiator. Do by. That is, when the power supply is connected, if the temperature difference between the hot air temperature and the outside air temperature is equal to or greater than a certain value (T1), it is determined that the work is interrupted due to a power failure and a buzzer alarm is issued (S101 to S105). As a result, the ventilating operation can be automatically started by driving the fan / circulation motor 59 and outputting the starting valve motor 60 (S106, S07). Start normal drying operation. When the temperature difference between the outside air temperature sensor 58 and the hot air temperature sensor 57 is not more than a predetermined temperature T2 (<T1), the temperature of the far-infrared radiator 10 is in a lowered state. First, it is left to the operator's judgment, and a warning is issued.

  FIG. 10 illustrates grain flow detection. The structure is such that the feeding valve 7 is intermittently rotated to circulate the grain. After turning on the feeding valve motor 60, the flow of the grain is changed by the load fluctuation of the circulation system motor 59, that is, the increase fluctuation of the load current value. It is configured to detect. Although the detection method of the grain flow using a conventional moisture sensor is known (Japanese Patent Laid-Open No. 2003-172581), since the detection of the moisture sensor can detect the grain entering the moisture sensor in units of grains, Although the accuracy is high, even if the feeding amount from the feeding valve 7 is reduced, it is determined that the grain flow is present as usual. However, if there is no grain amount greater than or equal to the predetermined amount as the transport amount, an abnormal state is predicted and an attempt is made to detect this. As shown in FIG. 10, the blower / circulation motor 59 constitutes current detection means 62 that can detect at least the drive load current value I1 of the elevator 18 and the lower transport device 25. Therefore, during drying, a circulation cycle of the feeding valve 7, that is, a cycle t of intermittent operation (including forward and reverse rotation) is set, and the grain circulation motors 59 and 60 and the burner 13 are driven to perform the drying operation. Enter (S201 to S205). The load current value of the air blower / circulation system motor 59 is detected by the detection means 62 to determine whether or not the current has increased. When there is no increase, it is determined that the soot flow is defective and an abnormal display is made (S206 to S212). In the above example, the blower / circulation motor 59 is used, but it is sufficient that at least the current of the circulation motor can be detected.

  FIG. 11 is a flowchart relating to the stop control of the circulation system. When the grain is circulated by intermittent operation of the supply valve 7, the load current of the blower / circulation system motor 59 after the supply valve motor 60 is turned on when the drying is stopped. A value I2 is detected, and the blower / circulation system motor 59 is stopped after a lapse of a certain time after the current value I2 increases.

  Conventionally, at the end of the drying operation, a stop process is performed to leave the grain in the bucket of the elevator 18 in order to confirm the degree of drying of the dried grain. That is, the supply valve motor 60 is rotated for a predetermined time from the time when the stop signal is output from the moisture sensor (drives immediately when the intermittent operation is stopped), and a certain time has elapsed since the supply valve motor 60 stopped. The post-circulation motor 59 was stopped to leave dry grains in the bucket. However, since this configuration uses time management, the amount of grain on the bucket is not stable due to the influence of grain properties, power supply frequency, and the like.

  Therefore, as shown in FIG. 11, after the output of the feed valve motor 60 is turned off, the load current value I2 of the circulation system motor 59 is read, and the circulation system motor 59 is stopped after a certain time in response to the determination result that the current has increased. It is composed. Therefore, the above-mentioned conventional defects can be solved.

  The burner 13 ejects fuel from the fuel pump 13g from a nozzle not shown, travels along the inner wall surface of the rotary vaporizing cylinder 13b, reaches the combustion disk 13a, and burns. The rotary vaporizing cylinder 13b is heated by the radiant heat of the flame and promotes vaporization of the kerosene fuel. Primary air (combustion air) necessary for combustion is sucked from the inlet 13h and supplied to the inside of the blow cylinder 13d. The amount of combustion air is controlled by the rotation of the air conditioning fan motor 13n interlocking with the air conditioning fan 13m. The That is, when the necessary fuel supply amount y is received, the drive frequency f of the fuel pump 13g is designated and output, and the rotational speed n of the air conditioning fan motor 13n is controlled and output. FIG. 12 shows an improvement regarding such a vaporizing burner 13. That is, when the burner 13 stop signal is output, the fuel pump 13g is immediately stopped, and the air conditioning fan 13m continues to rotate for a while to scavenge the inside of the burner 13. For this reason, conventionally, when the stop signal output is received, the air-conditioning fan 13m is configured to continuously rotate for a predetermined time at the maximum rotation speed in order to improve the scavenging performance.

  However, there is a case where fuel remains attached to the tip of a fuel supply nozzle (not shown), receives the scavenging air, reaches the vicinity of the combustion plate 13a, and exhibits a red fire combustion state. In this way, when red fire is generated, carbon accumulates in the combustion part, which is likely to cause combustion failure and ignitability reduction. Therefore, as shown in FIG. 12, the rotation of the air conditioning fan 13m in the burner stop control is gradually increased (S405 to S407). As shown in the flowchart of FIG. 12, by setting the rotational speed of the air conditioning fan 13m to a stepwise high rotation, the remaining fuel droplets are not sent out from the fuel supply nozzle terminal portion to the combustion portion at a time when the burner 13 is stopped. The above conventional drawbacks can be eliminated.

  FIG. 13 shows a configuration in which electric power necessary for the dryer 76 can be supplied by a fuel cell 77 attached to the machine. That is, the fuel cell 77 is supplied with hydrogen accompanying the reforming process of the city gas and oxygen accompanying the introduction of air, and combines the fuel cell stack 78 to generate power. The frequency of the electric current generated by this power generation is adjusted by the inverter 79 and then supplied to the grain dryer 76 to be used for starting up each part.

  On the other hand, the exhaust heat generated in the fuel cell stack 78 can be supplied to the grain dryer 76 by the blower 86 so as to be used as a heat source necessary for drying. Further, the supply line 82 from the inverter 79 to the grain dryer 76 is branched, and the supply line 84 is connected to a switchboard 83 on the way from commercial power to each household indoor wiring. When in use, it can be used as a household power source.

  In addition, a power storage unit 85 is configured on the output side of the fuel cell to supply the control device and the like. That is, the power required for the operation of a dryer such as a grain dryer is supplied by a fuel cell 77 attached to the machine, and a power storage unit 85 for storing a certain amount of electricity is provided after the fuel cell stack 78 to generate power. By adopting a configuration capable of supplying electric power when the dryer 76 is started or when the dryer 76 is started, the fuel cell 77 can be continuously operated even when power generation is stopped. Further, when the operation of the dryer 76 and the operation of the fuel cell 77 are performed in conjunction with each other, it can be used as an auxiliary power source until the output of the fuel cell 77 reaches a rating. This configuration can be applied to various machines that require a power source in addition to a dryer.

  FIG. 14 uses kerosene as a raw fuel for generating hydrogen. In the configuration using the city gas of FIG. 13, it is necessary to provide piping or the like, which has a drawback that the place of use is limited. Further, in a general commercial power source, the rotational speed of the motor fluctuates depending on the frequency, and it is necessary to cope with the configuration of the dryer or the software configuration, and the cost is inevitably increased. Furthermore, the power supply voltage and power supply frequency are different in overseas countries, and it is necessary to change each export model.

  In view of this, the fuel cell 77 attached to the machine supplies power necessary for the operation of the dryer 76, and kerosene can be used as fuel for generating hydrogen to be supplied to the fuel cell stack 78. As a result, it is possible to generate power at a necessary place when necessary, thus eliminating the above-mentioned drawbacks.

  Further, when using kerosene as described above, the fuel detection device 87 for detecting the remaining amount of fuel is provided and connected to the control device 88. When the remaining amount of fuel is input, the control device 88 calculates the power generation time and displays and outputs the power generation time. The operator can confirm the power generation time based on the display output, and can replenish the fuel or prevent the dryer operation from being stopped due to the power generation stop. In the above, instead of displaying the time when electricity can be supplied, the time required for operation on the dryer side is calculated and compared with the power generation possible time to determine whether fuel replenishment is necessary and display it. Is possible.

FIG. The front view which cut the whole part. The perspective view of an example of a far-infrared radiator. The front view of an operation panel. The side view of a part of burner and a far-infrared radiator. The top view of a burner. Control block diagram. flowchart. flowchart. flowchart. flowchart. flowchart. The block diagram of the dryer using a fuel cell. The block diagram of the dryer using a fuel cell of another example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Grain dryer machine frame 13 Burner 15 Blower fan 25 Lower conveyance device 31 Upper conveyance device 40a Control box 40 Control part 53 Moisture sensor 57 Hot air temperature sensor 58 Outside air temperature sensor 59 Blower / circulation system motor 60 Feed valve motor 61 Nonvolatile Memory 62 Current detection means

Claims (2)

It is configured to circulate and transfer the cereal grains from the upper storage chamber to the lower cereal collection chamber via the grain flow passage, and return to the storage chamber by an elevator, and far-infrared radiation is emitted to the hot air chamber formed in the main body. In the grain dryer which is equipped with a body and has one end of the far-infrared radiator connected to the burner and configured to be able to ventilate the grain flow passage by the action of a suction fan, an outside air temperature sensor when the dryer is energized In addition, the temperature detection values of the hot air temperature sensor disposed in the hot air chamber to which the far-infrared radiator is mounted are input, and a control unit that drives the suction fan when the detected temperature difference is equal to or greater than a predetermined value is configured. Grain dryer. 2. The grain dryer according to claim 1, wherein the ventilation operation is not entered when the difference between the detected value of the outside air temperature sensor and the hot air temperature sensor is not more than a predetermined value when the power is connected.
The invention according to claim 3 is configured to circulate and transfer the stretched grain from the upper storage chamber to the lower cereal collection chamber via the grain flow-down passage and to return to the storage chamber by an elevator. In the grain dryer configured to be equipped with a far-infrared radiator in the hot air chamber to be formed and connected to one end of the far-infrared radiator to a burner, and to be able to ventilate the grain flow passage by the action of a blower fan, A grain dryer configured to include a grain moisture sensor for detecting the moisture value of the circulating grain and to store the detected value of the moisture sensor in a nonvolatile memory.

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