JPS6321108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is capable of accurately adjusting the amount of combustion air in a burner based on the fuel supply amount and outside temperature, and also displays the combustion air amount adjustment instruction value to accurately check the combustion state during drying. This invention relates to a combustion control device for a burner in a grain dryer that can be inspected.

Conventionally, grain dryers are equipped with a hot air generator to generate dry hot air, and the temperature of the dry hot air is controlled by adjusting the amount of fuel supplied to the burner of the hot air generator. It is being said.

Generally, in order to maintain good combustion conditions in a burner, it is necessary to adjust the amount of combustion air to an appropriate amount in relation to the amount of fuel burned. 55−
This is already known as described in Publication No. 751 and the like.

By the way, grain drying in a grain dryer usually takes about 10 hours, but in order to dry the grain efficiently without causing shell cracking, the combustion condition in the hot air generator should be checked at a timely manner during drying. It is important to make adjustments to ensure that the conditions are always appropriate, and for this purpose, it is necessary to adjust the amount of combustion air according to the amount of combustion, and to be able to accurately grasp the combustion state during drying. Ru.

Therefore, in view of this situation, the present invention calculates an appropriate adjustment instruction value for the combustion air amount of the burner based on the amount of fuel supplied to the burner and the outside temperature, and digitally displays the value in stages, thereby adjusting the combustion amount. The amount of combustion air can be adjusted accurately to maintain good combustion conditions, and the combustion conditions during drying can be accurately inspected and understood from the step-by-step digital display of the adjustment instruction value, allowing corrective adjustments to be made. It is an object of the present invention to provide a combustion control device for a burner in a grain dryer that can properly dry grain without causing shell cracking and can efficiently dry the grain.

In order to achieve the object, the present invention has a structure in which a sensor for the amount of grain to be dried and an outside air temperature sensor are provided, and the drying temperature is set based on the amount of grain to be dried and the outside air temperature. A combustion amount control device that adjusts the amount of fuel supplied to the burner to maintain the hot air temperature at a set drying temperature and a combustion air amount adjustment device to the burner are provided, and the device controls the amount of fuel supplied to the burner based on the amount of fuel supplied to the burner and the outside air temperature. This is a burner combustion control device for a grain dryer, characterized in that it is provided with a combustion air amount adjustment value indicating device that calculates and digitally displays the combustion air amount adjustment instruction value in stages.

By configuring the present invention as described above, the appropriate adjustment instruction value for the amount of combustion air in the burner is displayed digitally in stages based on the amount of fuel supplied to the burner and the outside temperature. Therefore, the amount of combustion air can be adjusted accurately according to the amount of combustion, and a good combustion state can be maintained, and the combustion state during drying can be accurately inspected and understood from the step-by-step digital display of the adjustment instruction value. By properly performing correction and adjustment, grains can be efficiently dried without causing cracking.

An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, 1 is a burner of a hot air generator installed in a grain dryer, 2 is a combustion tube, 3 is a burner motor, and 4 is a fuel supply pipe, from which the fuel is supplied. The fuel oil thus produced is atomized by high-speed rotation of the burner motor 3, and vaporized and burned within the combustion tube 2. Reference numeral 5 denotes a combustion air intake port of the burner 1, and the opening degree of the combustion air intake port 5 can be adjusted by moving an opening adjustment ring 6 back and forth. A combustion air amount adjustment device is configured. That is, the opening adjustment ring 6 is rotatably fitted into the casing of the burner motor 3, and its oblique guide groove 7 is engaged with the fixing pin 8, so that the opening adjustment ring 6 can be rotated. This causes it to move back and forth. 9
is a combustion air amount adjustment lever, and this combustion air amount adjustment lever 9 is attached integrally with the opening degree adjustment ring 6. Reference numeral 10 denotes a scale plate indicating the combustion air amount adjustment instruction value, and appropriate numerical values are displayed on this scale plate 10, such as, for example, . This indicates the adjustment position.

FIG. 3 shows the configuration of the combustion control device for the burner 1, and this combustion control device consists of an outside air temperature sensor 11, a grain filling amount sensor 12, and dry hot air blown from a hot air generator. It is composed of a hot air temperature sensor 13 that detects temperature, a combustion amount control device 14, and a combustion air amount adjustment value indicating device 15. The combustion control device is provided in a control panel (not shown) of the dryer. In addition, the filling amount sensor 1
2 may be a grain amount setting dial of a grain dryer. The combustion amount control device 14 includes a drying temperature setting circuit 16, an arithmetic circuit 17, and a pump flow rate control circuit 18. The drying temperature setting circuit 16 receives input signals from the filling amount sensor 12 and the outside air temperature sensor 11. , an appropriate drying temperature is set based on the amount of grain loaded and the outside air temperature, and a corresponding output signal is inputted to the calculation circuit 17.The calculation circuit 17 includes a drying temperature setting circuit 16 and a hot air temperature sensor. It receives the output signal from 13 and sends a control signal to the pump flow rate control circuit 18. Then, the calculation circuit 17 operates to calculate the pump flow rate in order to maintain the hot air temperature at the set drying temperature. A fuel pump 19 supplies fuel oil to the burner 1. Further, the combustion air amount adjustment value indicating device 15 is composed of an arithmetic circuit 20 and an indicator 21 for the indicated adjustment value, and the arithmetic circuit 20
receives a signal indicating the fuel supply amount from the pump flow rate control circuit 18 and a temperature signal from the outside air temperature sensor 11, calculates an appropriate amount of combustion air for the burner 1, and calculates the amount of combustion air integrated with the opening adjustment ring 6. A signal indicating the adjustment position of the adjustment lever 9 is sent to the display 21.
input. The adjustment position is digitally displayed on the display 21 step by step, for example. Further, an automatic combustion air amount adjustment device 22 may be provided in conjunction with the combustion air amount adjustment value indicating device 15. This combustion air amount automatic adjustment device 22 is composed of a geared motor 23 and its control circuit 24 that drive a damper or shutter (not shown) that adjusts the opening degree of the combustion air intake port 5 of the burner 1. The burner 1 is controlled by the control signal input from the arithmetic circuit 20.
The amount of combustion air is automatically adjusted based on the amount of fuel supplied to the engine and the outside temperature. In this case, the arithmetic circuit 20 calculates an adjustment value for the amount of combustion air and sends a signal corresponding to the adjustment value.

Next, its effect will be explained.

When drying grain, when a predetermined amount of grain is loaded into the dryer, the loaded amount is detected by a loaded amount sensor 12.
The outside air temperature at the location where the dryer is installed is detected by the outside air temperature sensor 11. Then, in the drying temperature setting circuit 16 of the combustion amount control device 14, an appropriate drying temperature is set according to the amount of grain loaded and the outside air temperature. Further, the hot air temperature during drying is detected by a hot air temperature sensor 13, and the fuel pump 19 is controlled via the arithmetic circuit 17 and the pump flow rate control circuit 18 so that the hot air temperature during drying is always equal to the set drying temperature. That is, by adjusting the amount of fuel supplied to the burner 1, the hot air temperature is controlled as described above. On the other hand, when the fuel supply amount is adjusted as described above, the pump flow rate control circuit 18 of the combustion amount control device 14 sends the combustion air amount adjustment value indicating device 15
The signal is input to the combustion air amount adjustment value indicating device 15, and the combustion air amount adjustment value indicating device 15 digitally outputs a combustion air amount adjustment instruction value that is corrected according to the combustion amount and according to the outside air temperature detected by the outside air temperature sensor 11. The information is displayed in stages on the display 21 as a display. Therefore, by adjusting the combustion air amount adjustment lever 9 to the numerical scale on the scale plate 10 that matches the value displayed on the display 21, the appropriate amount of combustion air can be supplied to the burner 1 according to the combustion amount and outside temperature. can be adjusted to In addition, during grain drying for over 10 hours, the combustion state can be accurately grasped at the time of inspection by simply reading the combustion air amount adjustment instruction value digitally displayed on the display 21, and the drying state can be corrected and adjusted during drying. It is possible to dry the grain efficiently without causing cracking of the grain.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a main part of a burner provided in a hot air generator of a grain dryer, Fig. 2 is a rear view of the same, and Fig. 3 is a configuration of a combustion control device. FIG. 1...burner, 5...combustion air intake, 6...
Opening adjustment ring, 9... Combustion air amount adjustment lever, 1
0...Scale plate indicating the adjustment position of the amount of combustion air, 11
...Outside air temperature sensor, 12...Insertion amount sensor, 1
3... Hot air temperature sensor, 14... Combustion amount control device, 15... Combustion air amount adjustment value indicating device, 16...
...Drying temperature setting circuit, 17... Arithmetic circuit, 18...
... Pump flow rate control circuit, 20 ... Arithmetic circuit, 21
...Indicator for adjustment instruction value.

Claims (1)

[Claims] 1. A sensor for the amount of grain to be dried and an outside air temperature sensor are installed, and the drying temperature is set based on the amount of grain to be added and the outside air temperature, and the hot air temperature is set by adjusting the amount of fuel supplied to the burner.Drying In addition to providing a combustion amount control device to maintain the temperature and a combustion air amount adjustment device to the burner, an adjustment instruction value for the combustion air amount of the burner is calculated based on the amount of fuel supplied to the burner and the outside temperature. A combustion control device for a burner in a grain dryer, characterized in that it is provided with a combustion air amount adjustment value indicating device that digitally displays it.