JPS6018913B2 - Automatic hot air temperature control device for grain dryer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of an automatic hot air temperature control device for a grain dryer, and includes a plurality of injection nozzles of different diameters each equipped with a fuel opening/closing valve in a heat generator of the grain dryer. In addition, at least one temperature switch is installed in the hot air chamber, which operates according to the upper and lower regulated temperatures, and each of these rock sections is connected electrically in relation to each other, so that differences in atmospheric temperature such as day and night can be controlled. In response to the temperature change inside the hot air chamber, multiple injection nozzles with different diameters are switched to increase or decrease the amount of fuel being combusted, and the drying hot air is constantly maintained at a desired temperature. The purpose of the present invention is to provide an automatic hot air temperature control device for a grain dryer.

Embodiments of the present invention will be described based on the drawings.

In Fig. 1, reference numeral 1 includes a hot air chamber 2, a grain flow path 3,
3. It is a drying section machine that has ventilation chambers 4, 4 arranged side by side, an 8E wind fan 5, and a heating generator 6, with a grain tank 7 mounted on the top and an elevator 8 erected on one side. This is a circulating grain dryer designed in a unique manner. Next, the heating generator 6 will be explained in detail with reference to FIG. 2. An injection nozzle 11a with an aperture ratio of 1:2 is attached to a cylindrical outlet 10 disposed on the blower 9.
11b are arranged in parallel to each other in the direction of the center of the wisteria, and a spark plug 12 is provided protruding near the spark plug 11b, and the discharge side 1 of the outlet 10 is
3 is adjacent to a combustion chamber 17 in which a plurality of porous-walled cylinder crown-shaped dragon bodies 14 and 15 of different diameters are superimposed in approximately the same D shape with an appropriate interval 16, and the end of the combustion chamber 17 on the outlet side. Swirl wall 19
A shielding plate 18 is provided at the other end, and the blower 9, the blower port 10, and the combustion chamber 17 are integrally formed. Reference numeral 20 denotes an oil supply pipe for supplying oil to each of the nozzles 11a and 11b, and the oil supply pipes 20 and 20' are provided with electromagnetic valves 21a and 21b each having an on-off valve, and the plug 12 is connected to a transformer. 22 is in charge.

The heating generator 6 is disposed in or inside the hot air chamber 2, and at least one temperature switch 23 is installed on the inner side wall of the hot air chamber 2 to operate individually depending on the upper and lower regulated temperatures. Note that the injection nozzles 11a and 11b in this embodiment
Although the diameters of the openings are set at a ratio of 1:2, the number and the ratio of the diameters are arbitrary and are not limited in any way. Next, the temperature switch 23 of the hot air chamber 2 will be explained based on the hot air temperature adjustment circuit 24 of FIG. 4.

Set any regulated temperature between power terminals R and S, for example 4yo,
The thermostats 23a and 23b operated by the 470 are arranged in parallel with the electromagnetic coils R, , R2, and the electromagnetic coils R and B contacts (make contact) and the electromagnetic coil R (make contact) are connected to the electromagnetic valve 21a of the small diameter injection nozzle 11a. (contact) electromagnetic coil R2 is connected in parallel, and a large-diameter injection/
A contact electromagnetic coil R is connected to the electromagnetic valve 21b of the valve 11b.
, and the a-contact electromagnetic coil R2 are connected in parallel, and the circuits of both injection nozzles 11a and 11b are connected in parallel between the power supply terminals. As shown in Fig. 3, the arbitrary temperature A of the drying hot air in this example is 45°C, and the upper and lower regulated temperatures are 470 and 43°C, and the combustion amount is increased or decreased at each regulated temperature to adjust the temperature. It is formed so as to correct it.

Further, the aperture of the injection nozzle is set to an arbitrary atmospheric temperature B, for example 290 (normal temperature in the area), and at that time, the large-diameter injection nozzle 11b is fully opened to burn to reach the reference temperature (45°C). This is an example of the case where hot air for drying is obtained, and each of the above numerical values may be arbitrarily changed depending on the grain drying conditions and is not limited in any way. Since the present invention is configured as described above, when the raw material grain is fed into the upper grain tank 7 at room temperature and the circuit 24 is energized to ignite the heating generator 6 and drive the iron device, the thermostat is activated. 2
Since the respective heron points 3a and 23b are open, both injection/throttles 11a and 11b inject and burn fuel.

And when the hot air temperature exceeds 43qo, thermostat 2
The b support point of 3a is connected, while the b of thermostat 23b
Since the contact remains closed, the electromagnetic coil R2 is energized and the a contact R2 of the large-diameter injection nozzle 11b circuit is closed, so the nozzle 11b injects and burns fuel to reach a predetermined drying hot air temperature. Generates hot air at 45℃. In addition, the grains in the upper grain tank 7 flow down and accumulate in the grain flow paths 3, 3 to form a grain tank, and the hot air crosses the core grain tank from the hot air chamber 2 to the BE air chambers 4, 4 and has a drying effect. The dried grains are returned to the upper grain tank 7 via the elevator 8, and the so-called circulating tempering drying process is continued. Generally, the grain at the time of harvest has a high moisture content, and therefore, tempering and drying is carried out for a long time. Therefore, the temperature of the air supplied to the heating generator 6 changes appropriately over time, and therefore the hot air The temperature of the drying hot air in the chamber 2 also changes accordingly by increasing or decreasing the temperature.

Therefore, this device includes a large-diameter injection nozzle 11b that heats the air supplied to the heating generator 6 at room temperature by 20°C, and a
A jet nozzle 11a with a diameter of 4 mm for heating at 0qo was installed in parallel, and a temperature switch 23 was installed inside the hot air chamber 2 to operate the upper and lower regulation temperatures of 430 and 470, respectively, and the predetermined temperature of the drying hot air was set at 45q0. Therefore, when the temperature of the outside air gradually decreases while the above-mentioned drying action continues, the temperature of the hot air in the hot air chamber 2 also decreases, and the thermostat 23a
When the set value 4yo is reached, the contact closes and the electromagnetic coil, R, is excited, and the contacts R,, R, of both injection nozzles 11a, 11b circuit are closed, and both nozzles 11a, 11b
In both cases, fuel is injected into the hot air chamber 2 whose temperature is decreasing, and the amount of combustion is rapidly increased (130 qo) to perform combustion heating. When the temperature exceeds 0 again, the contacts of the thermostat 23a operate in an inverted manner, and the electromagnetic coil R2 is excited to stop the injection from the small-diameter injection nozzle 11a, and the large-mouth injection nozzle 11b closes the injection. Burn. Such a combustion process is repeated as the indoor temperature changes, and the drying hot air temperature B is continuously maintained in a substantially isothermal manner against the drop in atmospheric temperature. And if the atmospheric temperature gradually rises,
In response to this, the hot air temperature in the hot air chamber 2 also rises, and when it reaches 470, which is set on the thermostat 23b, the contact opens and the electromagnetic coil R2 is not excited, so the a contact R2 of the large-mouth injection nozzle 11b circuit The electromagnetic coil R2 of the B contact of the small flea injection nozzle 11a circuit is closed, and the nozzle 11a opens □ and injects, immediately reducing the combustion amount (11
oo0) and burns. When the temperature drops to 47q0 again, the contacts of the thermostat 23b operate and close in an inverted manner, the small-mouth flea injection nozzle 11a side closes, and the large-mouth flea injection nozzle opens to inject and burn. Such a combustion process is repeated as the indoor temperature changes to continuously maintain the drying hot air temperature B in a substantially isothermal manner against the rise in atmospheric temperature. In addition, in this device, a plurality of temperature switches are provided to regulate the temperature of the hot air for predetermined drying to an appropriate range.
In some cases, a single temperature switch is provided to switch the number of each injection nozzle.

In short, the present invention provides an on-off valve in each of the oil supply pipes of a plurality of injection nozzles provided in a heating generator, and the on-off valve and the heating generator are installed inside a hot air chamber installed or installed inside. At least one temperature switch that operates according to upper and lower regulated temperatures is electrically connected, and the on-off valve of each injection nozzle is individually switched on and off in response to changes in hot air temperature in the hot air chamber. Since the structure is such that the amount of fuel burnt can be increased or decreased to continuously maintain a desired drying hot air temperature, it is possible to change each injection nozzle to a larger or smaller diameter to adjust the temperature of the hot air, as in the subordinate device. There is no need for complicated work or operations such as adjusting compressed air, and the number of injection nozzles can be changed in response to temperature changes in the drying heat chamber in the hot air chamber, and the amount of fuel injection can be increased or decreased immediately. Since the temperature of the hot air is always automatically regulated within an appropriate range and the drying action of the grain is carried out continuously, problems such as frequent cracking of grains, heat-damaged grains, and loss of taste due to poor temperature control can occur. Quality defects are completely prevented, fires caused by heating are prevented, and the control is accurately and automatically performed, resulting in remarkable effects such as being able to always expect high-quality dried grains. It is something.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway side view of the device, Fig. 2 is a sectional view of its heating generator, and Fig. 3 shows the relationship between atmospheric temperature and drying hot air temperature. The explanatory diagram shown in FIG. 4 is an electric circuit diagram thereof. 1. ．． ．． ．． ．． ．． Drying section fuselage, 2. ．． ．． ．． ．． ．． Hot air room, 3
．． ．． ．． ．． ．． ．． Grain channel, 4...Exhaust chamber, 5...
...Hinafu machine, 6...Heating generator, 7...
...Grain tank, 8...Elevator, 9...
Blower, 10...Blower mouth, 11a...Injection nozzle, 11b...Injection nozzle, 12...Spark plug, 13...Discharge side of blowhole 10, 14・
...Pavilion body, 15...Dragon body, 16...
Interval, 17... Combustion chamber, 18... Shielding plate, 19... Swal wall, 20... Fuel supply pipe, 21a... Electromagnetic Valve, 21b...
...Electromagnetic valve, 22...Transformer, 23...
...Temperature switch, 23a...Thermostat, 2
3b... Thermostat, 24... Hot air temperature control circuit, R,, R2... Electromagnetic coil/contact, A
......Arbitrary hot air temperature, B...Hot air temperature for drying. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1 A grain flow path, a hot air chamber, and a ventilation chamber are installed in parallel, and a heating generator,
In a drying device equipped with an air exhaust fan, an on-off valve is provided in each of the oil supply pipes of a plurality of injection nozzles provided in the heat generator, and the on-off valve and the hot air chamber are provided in series with or within the heat generator. It is electrically connected to internally installed temperature switches that operate according to upper and lower regulated temperatures, and the on-off valves of each injection nozzle are individually switched on and off in response to changes in the hot air temperature in the hot air chamber. An automatic hot air temperature adjustment device for a grain dryer that increases or decreases the amount of fuel burned and continuously maintains a desired drying hot air temperature.