JPS61265411A - Control device for burner - Google Patents

Abstract

PURPOSE:To enable a burner to always perform combustion under a normal state even when a voltage is decreased or the property of fuel is changed, by a method wherein an amount of the air for combustion set to a value suitable for a fuel amount is made controllable by proportionally varying the combustion air amount through the manipulation of a control knob. CONSTITUTION:A light lamp 5 is provided for lighting in a proper fuel amount position of an amount of fuel fed to the interior of a burner 1 through control of a test operation switch 4, and an airflow regulating knob 6 is provided for regulating an amount of the air for combustion, fed by a blower 3, so that a combustion airflow is regulated to a value suitable to a fuel amount prevailing during each lighting of the lamp 5. Through the control by the knob 6, a combustion airflow is set to a value suitable to a fuel amount during each lighting of the lamp 5. The set combustion airflow is stored in a control device 7, and a combustion airflow ranging throughout the whole area of a combustion amount burnt in the burner 1 by means of the stored combustion airflow during each lighting is stored in the control device 7. A combustion airflow amount ranging throughout the whole area of a fuel amount set and stored in the device 7 is proportionally varied and controlled through the manipulation of the control knob 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a burner control device and can be used in a dryer for drying grain, etc.

BACKGROUND ART Conventionally, a combustion air volume is set according to the amount of combustion supplied by a fuel pump into a burner, and a blower is controlled to blow air so that the set fuel air volume is achieved.

There is a test run device that burns in the combustion part of the burner and test runs the burner, and also a test run device that controls the combustion air volume to gR during the test run.
The configuration did not include any equipment for i-controlling.

Problems to be Solved by the Invention When a burner is used in a dryer for drying grain, fuel is blown out from the combustion part of the burner provided at the front of the dryer to the front, and this combustion By sucking the flame and outside air passing through the burner section with an exhaust fan installed at the rear of the dryer, this hot air is passed through the drying chamber, and the grains flowing down inside the drying chamber are exposed to this hot air. Let it dry, but
During this drying work, a blower blows a fuel air volume appropriate to the amount of fuel supplied into the burner, and the amount of combustion air blown by this blower is controlled by controlling the rotational speed of the motor that rotationally drives this blower. Therefore, when the voltage drops, the rotation of the motor decreases, and the blower no longer blows the prescribed combustion air volume that is appropriate for the amount of fuel, resulting in insufficient combustion air volume in the burner, resulting in poor combustion, and Depending on the properties, even if the amount of fuel is the same, the burner may not burn properly unless the amount of combustion air blown by the blower is increased or decreased from a predetermined amount.

Means for Solving the Problems This invention provides a fuel pump (2) that supplies fuel into a burner (1) that burns the fuel while spouting it forward, and a blower (3) that blows combustion air. The device (7) controls the test run switch (4) to start the test run of the burner (1).
At the same time, a lighting lamp (5) is provided which lights up at an appropriate fuel amount position according to the amount of fuel supplied into the burner (1) by operating the test run switch (4).
5) An air volume adjustment knob (6) is provided to adjust the combustion air volume blown by the blower (3) in order to adjust the combustion air volume to match the amount of fuel at each lighting time. By operation, a combustion air volume adapted to the amount of fuel when each lighting lamp (5) is turned on is set, and this set combustion air volume is controlled by the operating device (
7) The combustion air volume over the entire fuel amount to be combusted in the burner (1) is set and stored in the operating device (7) based on the stored combustion air volume at each lighting time. (7) Control the combustion air volume over the entire fuel amount set and stored in (8) The burner control device is provided with an air volume control device that proportionally changes and controls the combustion air volume over the entire fuel amount range set and stored in (8).

Functions and Effects of the Invention The fuel supplied from the fuel pump (2) and the amount of combustion air adapted to the amount of fuel are blown by the blower (3) and supplied into the burner (1). The combustion flame and the outside air passing around the burner (1) create hot drying air, which is then passed through the drying chamber and burned. The grains flowing down the drying chamber are exposed to this drying hot air and dried, but when starting combustion in this burner (1), operate the test run switch (4) to start combustion,
The lighting lamp (5) lights up at the position where the appropriate amount of fuel is supplied by the fuel pump (2), and by manually operating the air volume adjustment knob (6) at each lighting time, the air blower (3) is turned on. ), the combustion air volume blown by this blower (3) is set to the optimum combustion air volume for the supplied fuel amount, and the combustion air volume set for each lighting fuel amount is used to control the combustion air volume of the burner (1).
The burner (1) burns by setting and controlling the combustion air volume over the entire range of the amount of fuel supplied to the burner (1) by the air volume control device. The combustion air volume over the entire area of the supplied fuel is proportionally changed and controlled by the air volume control device, and the burner (1) burns.

According to the present invention, a trial run switch (4) is provided for starting trial combustion of the burner (1), and this trial run switch (4)
When the burner (1) is operated, the burner (1) starts combustion, the light lamp (5) lights up when the fuel amount is appropriate, and when the light is turned on, the air volume adjustment swing (6) is operated. The combustion air volume can be set and adjusted to a combustion air volume adapted to the fuel amount, and the set combustion air volume can be changed and controlled proportionally by operating the control control (8). This allows the burner (1) to always burn in a normal state even when the voltage drops or the properties of the fuel change. Since the condition can be checked, this burner (1) will not suffer from poor combustion during the actual drying operation.

Embodiment In the example shown in Figure 5, a burner case (11) is provided on the front wall plate of the machine wall (10) of the dryer (9), and a burner (1) is installed inside this burner case (11). The dryer (9) is further provided with an operating device (7) for controlling starting, stopping, etc., and an exhaust fan (12) is provided on the rear wall plate.
A storage chamber (13) is placed in the upper part of the 4m wall (1,0),
A drying chamber (14) is provided at the bottom, a feeding valve (15) for feeding and flowing grains is provided at the bottom of this drying room (14), and a grain collection system equipped with a transfer helix is provided at the bottom of this feeding valve (15). 41! A transfer gutter (16) is provided, and a transfer gutter (17) equipped with a transfer helix is provided above the storage chamber (13). The structure includes a grain hoist (1B) and a fuel tank (18) at the front of the wall (10).

The burner (1) has a combustion part (20) in the front part, and a support plate (4) fixed to the bottom wall plate part of the burner case (11).
8) It has a configuration that is mounted on the top, and the hot air generated from this burner (1) and the outside air passing around this burner (1) are sucked by the exhaust fan (12) and become hot air for drying. Hot air for drying is passed through the drying chamber (10),
14) The grains flowing down inside are exposed to this drying hot air and dried.

The burner (1) has a cylindrical ventilation chamber (21) with an open center that blows combustion air to the rear part.
A motor (23) for rotationally driving the vaporizer cylinder (22) and the like is fixedly provided inside the engine 21). A combustion cylinder (24) with an open center is fixed to the front part of the blower chamber (21), and a conical guide cylinder (25) with an open tip is fixed to this opening. 25) Combustion IIL (2
B) is fixed to the combustion tube (20), and the combustion tube (20
Near the outer periphery, there is an ignition heater (27) that ignites the fuel and a flame detection sensor (28) that detects the presence or absence of combustion flame.
This is a configuration with a

A scattering body (30) for receiving and rotating fuel supplied from a fuel nozzle (28) and the vaporizing cylinder (22) along the guide cylinder (25) are fixed to the shaft end of the motor (23),
A carburetor disc (31) is fixed to the mouth edge of the carburetor cylinder (22) with a small gap through which the fuel can flow out.
) is diagonally expanded in diameter forward and outward on the front edge side, and a jet nozzle (32) is formed between this wide diameter part and the combustion disk (28), and the jet nozzle (32) and the combustion plate (28) are The structure is such that vaporized fuel is ejected from the ejection holes of the disk (26) and combusted.

A blower (3) is installed on the outside of the upper wall plate of the burner case (11).
and a blower motor (34), and an intake cylinder (35) is provided in a state that projects from the air blower a (3) section into this burner case (11), and this intake cylinder (35) and the blower (3) are provided.
), and the ventilation am (3) and the ventilation chamber (21
) A ventilation duct) (313) is provided between the opening of the
The combustion air sucked from the intake port of the intake cylinder (35) passes through the blower (3) and the blower duct (3G) to the blower chamber (21).
) is configured to blow air into the inside. A blade-shaped detection sensor (3) is installed above the burner (1) in the burner case (11) to detect the presence or absence of outside air passing through the burner (1).
3), and this detection sensor (33) is equipped with a switch that is turned off when outside air is not passing through and turned on when outside air is passing through, and detects the presence or absence of passing wind. It is the composition.

A fuel pump (2) is provided on the outer side of the lower wall plate of the burner case (11), and a fuel hose (37), the fuel pump (2), and a fuel supply pipe (38) are connected to the fuel tank (18).
, the fuel is passed through the fuel nozzle (29) to the splashing body (3).
0) It is a configuration in which the water is supplied to the outer peripheral portion.

The operating device (7) is box-shaped and has a trial run switch (4), a start switch (39), and a stop switch (
40), an air volume adjustment device (6), a control release (8), a hot air temperature setting adjustment (41), and a lighting lamp (5), and an air volume control device (42) inside. Yes, this air volume control device (42) is connected to each switch (4), (
39), (40), and each of the lonely parts (6), (8
), (41), etc. are input to the input circuit (43).
, an A-D converter (
44), an input circuit (43) into which the converted value converted by this A-D converter (44) is input, and these input circuits (4
3) and a CPU (45) that performs arithmetic and logical operations and comparison operations on various input values input from (43);
(45) has an output circuit (48) that receives various commands and outputs them, and this air volume control device (42) controls the fuel pump (2), the ignition heater (2)
7), the blower motor (34) and the grain raising a (1)
8) and a motor (48) that rotationally drives the prerecording output valve (15) and the like are started, stopped, and controlled.

During dry combustion, the CPU (45) sets the hot air temperature to the temperature set by the hot air temperature setting knob (41).
This CPU (45) controls the amount of fuel supplied into the burner (1) by the fuel pump (2).
) The temperature of the hot air generated from the hot air temperature detection sensor (47
) detects the hot air temperature and compares it with a set hot air temperature to control the fuel pump (2) so that the temperature does not differ from the set hot air temperature, and at the same time, the air blower (3) is rotationally driven according to the amount of fuel supplied at this time. The configuration is such that the rotation of the motor (30) is controlled and the air blower (3) blows an amount of combustion air that is appropriate to the amount of combustion to be supplied.

When the test run switch (4) is operated when the burner (1) is subjected to trial combustion, the lighting lamp (5) is turned on at an appropriate fuel amount position for the amount of fuel supplied by the fuel pump (2).
lights up, and the combustion air at this lighting fuel amount is adjusted to the corresponding air volume.
The resistance value at the position of the air volume adjustment knob (6) at each set combustion air volume is read into the CPtJ (45) by the CPU (45). This stored value determines the amount of combustion air over the entire amount of fuel burned in the burner (1).
), and by operating the control amount (8), the combustion air volume over the entire fuel amount set in this CPU (45) is proportionally increased or decreased by this CPU (45). be.

In addition, the above-mentioned feeding valve (15) and the above-mentioned grain collection transfer gutter (1
B) a motor that rotationally drives a transfer helix installed inside;
Separately providing the grain hoist (18) and a motor for rotationally driving the transfer helix installed in the transfer gutter (17),
The rotation of each motor is controlled separately, and the motor rotates the feed valve (15) and the transfer helix in proportion to the amount of grain stored in the dryer (9). The rotation of the motor can be controlled to increase or decrease, for example, when the amount of stored grains increases, the rotation of this motor is controlled to increase or decrease in proportion to the amount of stored grains, and when the amount of stored grains decreases, the rotation of the motor is controlled to increase or decrease in proportion to the amount of stored grains. The rotation of this motor is configured to be controlled to decelerate, and along with the increase/deceleration control of this motor, the rotation of the motor that rotationally drives the shell elevator (18) and the transfer helix is also configured to be capable of being controlled to increase/decelerate. The increase/decrease control amount is always greater than the transfer amount of grains fed out and transferred by the feed valve (18) and the transfer helix. ! (1B) and an increase/decrease control amount that can be transferred by the transfer helix.

Drying 4m (9) By operating the front operating device (7), this dryer (9) is started, and at the same time, the ignition heater (27) of the burner (1) is energized, and this ignition heater (27) becomes red hot, and the fuel flows through the fuel tank (113), fuel hose (37), fuel pump (2), and fuel supply pipe (3).
8), the fuel is supplied to the outer peripheral surface of the scattering body (30) by the fuel nozzle (29), and the fuel is scattered by the scattering body (30) to the inner wall of the vaporizing cylinder (22), and the fuel is supplied to the inner wall of the vaporizing cylinder (22). While flowing down the vaporizer, it is ejected from the small gap between the vaporizer tube (22) and the vaporizer plate (31), and a portion of this ejected fuel is splashed onto the red-hot ignition heater (27), automatically igniting it and burning it. is started, and the combustion air is sucked in from the intake port of the intake cylinder (35), passes through the blower (3) and the blower duct (3B), and is sent to the blower chamber (21).
Air is blown inward. The combustion flame heats the vaporization tube (22), and the fuel flowing down inside the vaporization tube (22) is vaporized. It burns while spouting from the outlet (32) and becomes a combustion flame, and this combustion flame is detected by the flame detection sensor (28).
) and while this flame detection sensor (28) detects the flame, it is determined that the burner (1) is burning normally and combustion continues.

This combustion flame and the outside air passing around the burner (1) become drying hot air, which is sucked by the exhaust fan (12) at the rear of the dryer 41 (9) and cross-ventilates the drying room (14). The grains stored in the dryer (9) are exposed to this drying hot air while flowing down from the storage chamber (13) through the drying chamber (10) and are dried, until the grains reach a specified moisture content. Then, the operating device (7
) is automatically controlled by the air volume control device (42) of the dryer (9).
), but at the start of this drying work, the hot air temperature setting knob (41) of the operating device (7) is operated depending on the type and amount of grain stored in the dryer (9). By doing so, the amount of fuel to be combusted in the combustion section (20) of the burner (1) is controlled by the air volume adjustment device (42) of the operating device (7) so that the hot air temperature is set by this operation. The fuel pump (2) is automatically controlled by
2), the optimum amount of combustion air commensurate with the amount of supplied fuel is automatically controlled by the air volume control device (42) to rotate the blower motor (34) that rotationally drives the blower (3). This blower II (3) is used to blow the air into the blower chamber (2) of the burner (1).
1) Air is blown in and the burner (1) burns.

When performing trial combustion of the burner (1).

By operating the trial run switch (4) of the operating device (7), the lighting lamp (5) lights up at an appropriate fuel amount position, and the air volume adjustment spray (6) is turned on at this lighting fuel amount. When the optimum combustion air volume for this lighting fuel amount is set by operation, the combustion air volume for each lighting fuel amount is stored in the air volume control device (42) of the operating device (7). Based on the stored set combustion air volume, the combustion air volume over the entire area of the fuel to be combusted in the burner (1) is set by the air volume control device (42), and the combustion air is combusted in the burner (1). Also, when changing the combustion air volume over the set range, set the control percentage (8
), the set combustion air volume is proportionally increased or decreased, and the color of the flame ejected from the burner (1) is generally red. When the combustion air volume is insufficient,
By operating the control knob (8) to the side where the combustion air volume increases,
The combustion air volume is increased to cause combustion in the burner (1), and conversely, when the color of the ejected flame is blue overall, the combustion air volume is excessive, so the control swing (8) is changed to the combustion air volume. The burner (1) is operated to decrease the amount of combustion air to cause combustion in the burner (1). The combustion air volume set at the time of this trial combustion is used to control the combustion air volume even when the actual drying operation is started.

Depending on the color of the combustion flame ejected from the burner (1),
By operating the air volume control tr1 spreader (6) and the control a spreader (8), it is possible to set the combustion air volume that is appropriate for the amount of supplied fuel, so the burner (1) is kept in a stable state. burns with

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a block diagram, Fig. 2 is an enlarged side view, Fig. 3 is an enlarged rear view, and Fig. 4 is a partially cutaway front view of the dryer. FIG. 5 is an enlarged front view of a portion of the dryer. In the figure, (1) is the burner, (2) is the fuel pump, and (3) is the burner.
) is the blower, (4) is the test run switch, (5) is the lighting lamp, (6) is the air volume adjustment knob, (7) is the operating device, (8
) indicates a control arc.

Claims (1)

[Claims] A fuel pump (2) that supplies fuel into the burner (1) that burns while spouting fuel forward and a blower (3) that blows combustion air are provided, and a test run switch (4) that starts a test run of the burner (1) is provided. ) is provided on the operating device (7), and the burner (
1) A lighting lamp (5) is provided that is turned on at an appropriate fuel amount position according to the amount of fuel supplied to the interior, and the combustion air volume is adjusted to match the amount of fuel when the lighting lamp (5) is turned on. Blower (3)
An air volume adjustment knob (6) is provided to adjust the amount of combustion air blown by the fan, and by operating this air volume adjustment knob (6), the combustion air volume is adjusted to match the amount of fuel when each lighting lamp (5) is turned on. This set combustion air volume is stored in the operating device (7), and the combustion air volume over the entire fuel amount combusted by the burner (1) is determined by the stored combustion air volume at each lighting time. The settings are stored in the operating device (7), and the combustion air volume is controlled over the entire fuel amount set and stored in the operating device (7).
8) A burner control device including an air volume control device that changes and controls proportionally through operation.