JPH10274478A - Grain drying apparatus utilizing far-infrared ray - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grain drying apparatus capable of correctly grasping a temperature of hot air having influence on radiant quantity of far-infrared rays and correctly judging a drying condition for which the far-infrared rays are utilized. SOLUTION: This grain drying apparatus is provided with a means 22 for setting a combustion rate at a hot air generating source, a means 23 for displaying the combustion rate, and a control unit 20 in which the setting means 22 for the combustion rate is connected to the input side of the control unit 20 while the display means 23 is connected to the output side thereof. The control unit 20 calculates the combustion rate at the hot air generating source on the basis of a signal released out of the setting means 22 for the combustion rate and displays the calculated result on the display means 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grain drying apparatus for drying grains using far infrared rays.

[0002]

2. Description of the Related Art In order to dry grains such as glutinous rice, grain drying apparatuses for drying grains using hot air have been used. Furthermore, in order to dry these grains reliably and without damaging them, a grain drying apparatus that dries grains using far-infrared rays together with the hot air is considered.
It is also widely used. Such a grain drying apparatus using far-infrared rays is disclosed in, for example, JP-A-61-1952.
No. 65, No. 62-141486, No. 62-2
No. 13,680, JP-A-2-302578, and JP-A-6-3052. FIG. 4 shows a grain drying apparatus described in the above-mentioned Japanese Patent Application Laid-Open No. Hei 2-302578. Hereinafter, a conventionally known grain drying apparatus will be briefly described with the structure shown in FIG. 4 as an example.

In the grain dryer 1, a bucket elevator 3 is erected outside a box-shaped casing 2, and a burner 4 as a source of hot air, a heat distribution chamber 5, a suction fan 6 as a blower, an inflow air regulating device. A part 7 and the like are provided. In the casing 2, a grain storage unit 8, a drying unit 9, and a grain collection unit 10 are provided in this order from the top. A grain distribution screw 11 that communicates with the upper end of the bucket elevator 3 to laterally convey grains and distributes grains into the grain reservoir 8 is disposed above the grain reservoir 8. A grain collecting / conveying screw 12 is provided at the bottom of the grain collecting section 10 and communicates with the lower end of the bucket elevator 3. The bucket elevator 3 has a hopper (not shown) for embedding grain.
Is provided, and the grain can be freely inserted into the grain storage unit 8 via the grain distribution screw 11. During the drying operation, the grains to be dried discharged by the grain collecting and conveying screw 12 are sent to the grain distribution screw 11 and circulated. Further, when the drying operation is completed, it is possible to switch so that the dried grain is discharged from the bucket elevator 3 to the outside of the machine.

The drying section 9 has one end communicating with the heat distribution chamber 5 and the other end communicating with the inflow air adjusting section 7.
A plurality of tubular hot air passages 13 are provided. The hot air passage 13 is partially provided with a far-infrared radiator. The far-infrared radiator is formed by, for example, applying fine ceramics to a member constituting the hot air passage 13.

In the case of the conventional structure shown in the figure, the hot air passage 13 has a double tube structure of an inner tube 15 and an outer tube 16. As shown, only the inner pipe 15 communicates with the heat distribution chamber 5, and the end of the outer pipe 16 on the heat distribution chamber 5 side is in contact with the inner surface of the casing 2. The two spaces formed by the inner pipe 15 and the outer pipe 16 are opened to communicate with the grain storage section 8 through a number of vents of the outer pipe 16, and the exhaust path plate 17 extends from the side to the lower side. To form a grain logistics pathway,
Rotary valves 19, 19 are provided at the bottom of the grain distribution lower road. The suction fan 6 communicates with an exhaust passage formed below the exhaust passage plate 17. The grains discharged from the rotary valves 19, 19 are brought to the grain collecting and conveying screw 12.

In the grain drying apparatus constructed as described above, the grain to be dried, such as waxy rice, to be dried is put into the grain storage section 8 by the bucket elevator 3 via the grain distribution screw 11, and the bucket elevator 3, the grain In addition to the distribution screw 11, the burner 4, the suction fan 6,
By operating the rotary valve 19, the grain collecting / transporting screw 12, and the like, the dried grain is removed from the grain storage unit 8,
It is circulated and dried in the path of the drying section 9, the grain collecting section 10, and the bucket elevator 3. The circulation speed is determined mainly by the rotation speed of the rotary valve 19.

[0007] The hot air generated by the combustion of the burner 4 is introduced from the heat distribution chamber 5 into the hot air passages 13, 13, and the heat heats the far-infrared radiator provided in the hot air passage 13 to cause the far-infrared radiation. Is generated, and the grains flowing down the grain distribution lower passage 18 are dried. Also, the hot air that reaches the inflow air adjusting unit 7 after heating the far-infrared radiator,
Here, the air is mixed with the outside air and discharged from the outer tube 16 through the passage between the inner tube 15 and the outer tube 16, and is forcibly passed through the grain flowing down the grain distribution lower passage by the attraction of the suction fan 6. And dry the grain. Further, the moisture generated by drying and the fine dust generated by the movement of the grains are attracted to the suction fan 6 through the exhaust passage plate 17 and discharged outside the machine. It is to be noted that so-called tempering can be freely performed during the drying operation.

When the drying operation is completed, the combustion of the burner 4 is stopped, the circulation path of the bucket elevator 3 is switched, and the dried grain is discharged outside the machine.

In the grain drying apparatus described in the above-mentioned publication, electromagnetic waves containing a large amount of far-infrared rays can be uniformly and directly applied to grains flowing down around the far-infrared radiator, thereby eliminating heat loss of far-infrared rays and improving efficiency. Good grain drying can be performed. At the same time, drying unevenness can be reduced, and the occurrence of body cracks can be eliminated.

[0010]

In this type of grain drying apparatus using far-infrared rays, the wavelength of the far-infrared rays to be radiated is important as a factor for efficient and reliable drying. For this reason, in a conventional grain drying and drying apparatus,
An optimum combustion amount of the burner 4 is set, and drying is performed at the set constant combustion amount. On the other hand, when the amount of the grain to be dried changes or when the drying operation must be completed within a certain period of time, the amount of combustion in the burner 4 is changed to meet the demand, and It changes the amount of infrared radiation. Since the amount of far-infrared radiation affects the drying capacity, an index for using the far-infrared radiation amount as the drying capacity is required when the amount of combustion is changed. Conventionally, a hot air temperature obtained by a grain drying apparatus is used as the above index. Hot air is burner 4
Is used to set the temperature around the far-infrared radiator to the temperature required for far-infrared radiation, so that the temperature of the hot air is most related to the far-infrared radiation amount. This is the reason for using the hot air temperature as an index. However, conventionally,
The hot air temperature used as an index is a temperature for hot air that reaches the inflow air adjusting section (portion indicated by reference numeral 7 in FIG. 4) and is exhausted while being mixed with the outside air. The amount of far-infrared radiation from the radiator cannot be accurately grasped. In other words, the temperature of the exhaust hot air is
The temperature of the hot air that is exhausted drops due to the heat received by the grains or the loss in the hot air passage, and the temperature of the exhausted hot air changes in accordance with the amount of heat stored in the air depending on the flow rate of the air flowing near the far-infrared radiator. It will be different. for these reasons,
If the temperature of the exhaust hot air is used as the ambient temperature of the far-infrared radiator, there may be an error between the temperature and the actual ambient temperature of the far-infrared radiator. It is not possible to accurately determine the drying efficiency.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the conventional grain drying apparatus using far-infrared rays, an object of the present invention is to make it possible to accurately grasp the temperature of hot air that affects the amount of far-infrared radiation, and to use a far-infrared drying state. It is an object of the present invention to provide a grain drying device capable of accurately determining the grain drying.

[0012]

In order to achieve this object, a first aspect of the present invention provides a hot air generating source capable of generating hot air, and radiates far infrared rays by heat of the hot air generated by the hot air generating source. A far-infrared radiator, and a blower for diffusing air around the far-infrared radiator, and drying the cereal by introducing the cereal to be dried into a casing provided with the far-infrared radiator. In the grain drying device, a means for setting the amount of combustion at the hot air generation source, a means for displaying the amount of combustion, and a means for setting the amount of combustion are connected to an input side, and the display means is connected to an output side. A control unit that calculates a combustion amount based on a signal from the combustion amount setting unit, and displays the calculation result on the display unit.

According to a second aspect of the present invention, in the grain drying apparatus using far infrared rays according to the first aspect, the control unit includes:
The amount of combustion at the hot air source and the temperature of the hot air passing through the far infrared radiator can be switched and displayed.

According to a third aspect of the present invention, in the grain drying apparatus using far infrared rays according to the first aspect, the combustion amount detecting means includes a fuel gauge for detecting an amount of fuel supplied to the hot air generation source. It is characterized by being used.

[0015]

According to the first and third aspects of the present invention, the amount of combustion at the hot air source calculated by the control unit is displayed. The amount of combustion affects the temperature of the hot air obtained from the amount of heat generated, and the temperature of the hot air affects the amount of far-infrared radiation. Can be Thereby, unlike the case of detecting the temperature of the exhaust hot air that has dropped after passing through the far-infrared radiator, the combustion amount can be used as a factor that affects the actual far-infrared radiation amount, The actual far-infrared radiation amount can be used as an index as a material for determining the drying ability.

According to the second aspect of the present invention, since the combustion amount of the hot air source and the exhaust gas temperature can be switched and displayed, it is possible to determine the drying efficiency by selecting information which is easy for the operator to determine.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to illustrated embodiments. The grain drying apparatus according to the present invention is characterized in that the ambient temperature of the far-infrared radiator can be displayed by the burning amount of a burner which is a hot air supply source to the far-infrared radiator. 2 is a block diagram for explaining the configuration of the control unit 1 as a configuration therefor.
In FIG. 1, a control unit 20 is constituted by a microcomputer capable of performing arithmetic control processing. An input hot air temperature sensor 21 and a hot air wind sensor are provided on an input side via an I / O interface (not shown). Fuel supply control device 2 corresponding to means for setting the amount of combustion at the source
2 is connected, and a display device 23 is connected to the output side. Although not shown, the control unit 20 stores ROM and various data storing basic programs and basic data for fuel supply control at a burner corresponding to a hot air generation source or air volume control for generating hot air. R that can be captured
AM is equipped.

The grain drying apparatus used in this embodiment has the structure shown in FIG. FIG. 2 is a schematic diagram for explaining the configuration of the grain drying device. In FIG. 2, the grain drying device 30 includes a burner 31 corresponding to a hot air generation source,
The first to third radiation tubes 32 to 34 capable of emitting far infrared rays by the heat of the hot air generated by the burner 31 and the first to third radiation tubes 3 generated by the hot air generated by the burner 31.
First and second communication pipes 35, 3 for feeding into 2 to 34
6 and first and second heat distribution chambers 37 and 38. The burner 31 is capable of adjusting the amount of combustion by being supplied with fuel from a fuel supply control device 22 described later, and is in communication with the first heat distribution chamber 37. The first heat distribution chamber 37 communicates with the first radiation tube 32,
The radiation tube 32 communicates with the second heat distribution chamber 38. The second heat distribution chamber 38 includes second and third radiation tubes 33, 3
4 are in communication. First and second communication pipes 34, 35
Communicates with the first radiation tube 32 and the second and third radiation tubes 33 and 34, respectively. In such a configuration, the hot air generated from the burner 31 is supplied to the first to third radiation tubes 32 to
34, the far-infrared rays are radiated, and the grains are dried together with the hot air. This configuration is disclosed in the specification of Japanese Patent Application No. 8-33826 filed earlier by the present applicant.

On the other hand, the control section 20 displays the input energy corresponding to the fuel supply amount to the burner 31 set in the fuel supply control device 22 as the combustion amount to the outside. For this reason, the control unit 20 calculates the fuel supply amount in the burner 31 by the following method. The first method is to calculate a combustion amount by arranging a flow meter in a fuel passage to the burner 31 and taking in a measurement signal from the flow meter. The second method is for a gun type burner capable of constant combustion. In this case, a unit time based on the operating duty ratio of the fuel pump or the on-off valve set by the fuel supply control device 22 is used. A method of calculating the amount of combustion from the amount of fuel supplied per unit. The third method is for a variable flow rate burner. In this case, the combustion amount is calculated from the supplied fuel amount based on the output time of the drive signal of the fuel pump.

The amount of combustion in the burner 31 affects the temperature of hot air generated by the burner 31, and the temperature of the hot air affects the amount of far-infrared radiation from the far-infrared radiator. In the present embodiment, the burning amount of the burner 31 that affects the amount of far-infrared radiation is displayed as the drying capacity. Thereby, unlike the case where the information as the drying ability in the grain drying device uses the hot air temperature after the heat loss,
In fact, it will be obtained as information corresponding to the amount of far-infrared radiation that acts directly on the grain for drying.

The control unit 20 can also take in and display the exhaust hot air temperature detected by the exhaust hot air temperature sensor 21 in addition to the above-described combustion amount as in the related art. , As shown in FIG.
This is performed by operating a changeover switch 23A provided on the display panel of the display device 23. Changeover switch 2
A display window 23B equipped with a display medium (not shown) such as an LED is provided near 3A, and an operator can read a value displayed on the display medium through the display window 23B. According to such a configuration, it is possible to display the moisture evaporation ability of the grain using far-infrared radiation and the drying ability by the hot air itself, so that it is possible to analyze the drying state more finely.

The controller 20 capable of taking in the temperature of the hot air from the exhaust gas can also perform the following processing.
That is, a far-infrared radiation temperature is obtained from the combustion amount, a temperature difference between the radiation temperature and the exhaust hot air temperature is calculated, and the temperature difference is compared with a temperature difference set in advance corresponding to the amount of grain to compare the temperature. If so, it is determined that a good dry state has been obtained. This is based on the fact that the temperature difference is obtained in proportion to the amount of evaporated water generated during drying. On the other hand, when the temperature differences do not match, the combustion amount in the burner 31 is adjusted to match the temperature differences. However, in this case, it is necessary from the viewpoint of the heat resistance of the far-infrared radiator that the far-infrared radiation temperature is equal to or lower than the upper limit value, and when the temperature reaches the upper limit value, the amount of hot air is adjusted. I do. Thereby, the drying efficiency can be stabilized.

Since the present embodiment has the above configuration,
When the fuel supply amount corresponding to the combustion mode of the burner 31 is taken in as information, the control unit 20 calculates the combustion amount, converts the result into a display signal for the display device 23, and outputs the signal. The display device 23 displays either the combustion amount or the exhaust hot air temperature according to the operator's selection. For example, the display unit 23 compares the combustion amount with the preset combustion amount corresponding to the grain amount or the temperature difference described above. Thus, necessary correction measures such as a change in the amount of combustion in the burner 31 or a change in the amount of hot air can be performed.

[0024]

As described above, claims 1 and 3
According to the invention described above, the amount of combustion at the hot-air source calculated by the control unit can be displayed, so that the amount of far-infrared radiation that actually contributes to drying can be easily recognized. As a result, the drying capacity corresponding to the amount of grain or the drying time can be grasped based on the information at the actual drying position unlike the exhaust hot air temperature after drying, so that the drying state can be accurately determined. Becomes possible.

According to the second aspect of the present invention, since the combustion amount of the hot air source and the exhaust gas temperature can be switched and displayed, it is possible to determine the drying efficiency by selecting information that is easy for the operator to determine.

[Brief description of the drawings]

FIG. 1 is a block diagram for explaining a configuration of a control unit corresponding to a main part of a grain drying apparatus using far-infrared rays according to the present invention.

FIG. 2 is a schematic diagram for explaining a configuration of a grain drying device according to the present invention.

FIG. 3 is a schematic diagram showing a part of a display device used in the control unit shown in FIG.

FIG. 4 is a schematic diagram for explaining an example of a grain drying apparatus using far-infrared rays.

[Explanation of symbols]

 Reference Signs List 20 control unit 21 exhaust hot air temperature sensor 22 fuel supply device 23 display device 30 grain drying device 31 burner corresponding to hot air generation source

Continuing from the front page (72) Inventor Kotaro Kubota 1-40-2 Nisshin-cho, Omiya-shi, Saitama Prefecture Inside the Research Institute for Biological Sciences (72) Inventor Yasuyuki Hidaka 1--40-2 Nisshin-cho, Omiya-shi, Saitama Within the Research Institute for Specified Biotechnology (72) Inventor Tomohiko Ichikawa 1-40-2 Nisshincho, Omiya-shi, Saitama

Claims (3)

[Claims] 1. A hot-air generating source capable of generating hot air, a far-infrared radiator capable of radiating far-infrared rays by heat of hot air generated by the hot-air generating source, and diffusing air around the far-infrared radiator. In a grain drying device that includes a blower and dries the grain by introducing the grain to be dried into a casing in which the far-infrared radiator is disposed, a means for setting a combustion amount in the hot air generation source, Means for displaying the amount of combustion, and a control unit wherein the means for setting the amount of combustion is connected to the input side and the display means is connected to the output side. A grain drying apparatus using far-infrared rays, wherein the amount of combustion in the hot-air generating source is calculated based on the signal of (1), and the calculation result is displayed by the display means. 2. The grain drying apparatus using far-infrared rays according to claim 1, wherein the control unit can switch and display the amount of combustion at the hot-air generating source and the temperature of hot wind passing through the far-infrared radiator. A grain drying apparatus using far-infrared rays. 3. The grain drying apparatus using far-infrared rays according to claim 1, wherein the combustion amount detection means uses a fuel gauge for detecting an amount of fuel supplied to the hot air generation source. Grain drying equipment using far infrared rays.