JP3003273B2 - Oil burner control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an indoor exhaust type oil combustor.

[0002]

2. Description of the Related Art In general, this type of oil combustor has a problem that an odor is generated when a fire is extinguished.
An odor countermeasure as disclosed in Japanese Patent Application Publication No. 09-0909 is known. FIG. 4 shows a control block diagram of the odor countermeasure.
Reference numeral 1 denotes an operation command unit, and 32 denotes a combustion control unit that receives a start / stop operation signal from the operation command unit 31 and controls the fuel pump 33, the burner fan 34, and the convection fan 35.
As shown in the flowchart of FIG. 5, when the stop signal is input, the combustion control unit 32 stops the fuel pump 33, sets the burner fan 34 to low rotation to burn unburned gas in the combustion unit, and sets the convection fan 35 The power supply to the power supply is temporarily stopped so that a slight odor is not released into the room.

[0003]

However, in the above-described conventional configuration, the power supply to the convection fan 35 is temporarily stopped at the time of extinguishing, but the convection fan 35 continues to rotate even after the power supply is stopped due to the inertial force and is generated in the combustion portion. Since a small amount of odor was released into the room, a sufficient odor control effect could not be obtained.
Although the burner fan 34 is rotated at a low speed, the combustion air is forcibly supplied, so that the amount of combustion immediately before extinguishing becomes constant regardless of the intensity, and when the intensity is high, the amount of unburned gas is large, so that the amount is large. When the amount of air is low, the amount of unburned gas is small, so even though a small amount of air is sufficient, this cannot be dealt with, and the unburned gas remaining in the combustion section cannot be burned efficiently. There were many odors.

The present invention has been made to solve such a problem, and has as its object to further reduce the odor at the time of fire extinguishing.

[0005]

In order to achieve the above object, the present invention provides a combustion section, a fuel pump for supplying fuel to the combustion section, a burner fan for supplying combustion air to the combustion section, and A convection fan that blows out the combustion gas from the unit as hot air to the outside of the device body, and drives the fuel pump, burner fan, and convection fan according to the room temperature to control the amount of combustion in the combustion unit, and simultaneously stops fuel combustion. pump,
A combustion control unit that stops energization of the burner fan, a timer unit that is started by the combustion stop and controls energization of the convection fan and the burner fan, and a fan control unit that brakes the convection fan, The department is
A first timer section which is started by stopping the combustion, and a second timer section which is started when the first timer section is counted up.
The first timer unit includes a third timer unit that is started when the timer unit and the second timer unit are counted up, and a fourth timer unit that is started when the third timer unit is counted up. Until the time is up,
The fan braking unit is operated, and the second timer unit stops energizing the convection fan until counting up.
The timer is energized to rotate the convection fan strongly until counting up, and the fourth timer unit is energized to rotate at a lower rotation speed than the strong rotation until counting up, The first and second timer units are configured to stop supplying power to the burner fan until counting up, and the third and fourth timer units are configured to supply power to rotate the burner fan until counting up. It is.

[0006]

According to the present invention, the convection fan is instantaneously stopped by the brake when the combustion is stopped by the above-mentioned structure, and the odor generated in the combustion portion is not released into the room. The amount of air commensurate with the amount is sent, and the unburned gas remaining in the combustion section can be burned more efficiently. Also, the convection fan can be braked for a very short time,
It is possible to reduce electromagnetic noise and braking current for applying a brake. Further, the convection fan is in a stopped state while the first and second timer units are counted up, so that the temperature of the device body rises. The temperature can be lowered, and overheating of the main body can be prevented. further,
The convection fan rotates strongly for a certain period of time so it faces the vaporization cylinder.
The nozzle can be cooled rapidly, and the unburned gas
Can be prevented from occurring.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the combustor will be described with reference to FIG. 3. Reference numeral 1 denotes an apparatus main body, 2 denotes a combustion unit provided in the apparatus main body 1, and a vaporizing cylinder 3 for vaporizing fuel and mixing it with combustion air. And a burner unit 4 for burning the mixed gas from the vaporizing cylinder 3
Consists of Reference numeral 5 denotes a fuel pump for supplying fuel into the vaporizing cylinder 3; 6, a burner fan for supplying combustion air into the vaporizing cylinder 3; It is a convection fan that blows warm air from the outlet 8. Reference numeral 9 denotes a control device for controlling the amount of combustion, combustion, and combustion stop by driving the fuel pump 5, the burner fan 6, and the convection fan 7. FIG. 1 is a block diagram of the control device, wherein 10 is a room temperature setting unit, 11 is a room temperature detection unit,
Reference numeral 2 denotes a combustion control unit which controls the amount of combustion in several steps or steplessly from low to high based on the outputs from the room temperature setting unit 10 and the room temperature detection unit 11 and stops and starts the combustion. Control signals are sent to the fan 6 and the convection fan 7. Reference numeral 13 denotes a timer section that starts when a combustion stop signal is received from the combustion control section 12, and includes a first timer section 13a, a second timer section 13b, a third timer section 13c, and a fourth timer section 13d, and a predetermined time has elapsed. The output is sent to the burner fan 6 and the convection fan 7 until the operation is completed. Further, the fan braking unit 14 is configured to apply a brake to the convection fan 7 and stop while receiving the output from the first timer unit 13a. Reference numeral 15 denotes an operation command unit for giving a command to start / stop the combustion control unit 12.

Next, the operation of the control device in the above configuration will be described with reference to the flowchart of FIG. First, when an operation command is confirmed in step 16, the combustion control unit 12 starts combustion according to a predetermined program. When the combustion is confirmed in step 17, when the combustion control unit 12 sets the combustion amount to any of high to low based on the output from the room temperature setting unit 10 and the room temperature detection unit 11, the signal is transmitted to the fuel pump 5 and the burner fan. 6. These are sent to the convection fan 7 to control them. Then, at step 18, the presence / absence of the combustion / operation stop signal is checked. This combustion / operation stop signal is, of course, based on a stop command from the operation command unit 15,
Also when the room temperature from the room temperature detecting unit 11 is higher than the room temperature set by the room temperature setting unit 10, the combustion control unit 12 issues the alarm.

Next, when the combustion stop signal is confirmed in step 18, the combustion control unit 12 stops the fuel pump 5 and at the same time stops the power supply to the burner fan 6, and starts the first timer unit 13a. . Then, it is determined in step 19 whether or not the first timer section 13a times out.
The fan braking unit 14 is driven to brake the convection fan 7 until the time is up, for example, for one second. Therefore, at the time of fire extinguishing, the convection fan 7 stops instantaneously without continuing to rotate due to inertia, and the slight odor generated in the combustion part is not released into the room. Further, since the burner fan 6 only stops the energization, the burner fan 6 continues to rotate by the inertial force and continues to send the combustion air. At this time, the burner fan 6 rotates strongly when the amount of combustion immediately before extinguishing is strong and weakly when it is weak under the control of the combustion control unit 13, so that the amount of air sent to the combustion unit by the inertia force is also strong. -The air amount corresponding to the weak combustion amount is supplied. That is, air optimal for the combustion amount immediately before the fire is extinguished is supplied, and the unburned gas remaining in the combustion section can be more effectively burned.

[0010]

After the first timer 13a counts up, the second timer 13b is activated. The second timer section 13b counts, for example, for 3 seconds, during which the power supply to the convection fan 7 is stopped. Further, the power supply to the burner fan 6 is stopped until the first and second timer sections 13a and 13b count up.

Therefore, according to this embodiment, when the combustion is stopped, the convection fan 7 is braked for a very short time until the time-up of the first timer unit 13a is confirmed in step 19, and thereafter, in step 20, the second timer The energization of the convection fan 7 is stopped until the time-up of the section 13b is confirmed. Therefore, it is possible to reduce electromagnetic noise generated by applying a brake to the convection fan 7 and reduce a brake current applied to the convection fan 7. Also, at this time, the convection fan 7 does not rotate even when the power is stopped by the first brake, and the slight odor generated in the combustion portion is not released into the room. Further, the burner fan 6 also sends the air corresponding to the amount of combustion immediately before the fire is extinguished by inertia, so that the odor itself can be reduced.

Further, in step 20, the second timer unit 1
When the time-up of 3b is confirmed, the convection fan 7 continues to rotate at a high speed until the time-up of the third timer unit 13c is confirmed in step 21. Next, when the type up of the third timer unit 13c is confirmed, the third timer unit 13c is initialized, and the fourth timer unit 13d is activated.
The convection fan 7 continues to rotate at a lower rotation speed than the strong rotation until the time-up of the fourth timer unit 13d is confirmed in step 22, and the burner fan 6 is energized and continues to rotate at a certain constant rotation speed.

[0014]

As apparent from the above description of the embodiment, according to the present invention, when the combustion stops, the convection fan is braked and stopped instantaneously, so that the odor generated in the combustion part is released into the room. In addition, the burner fan continues to rotate due to inertia, so it sends an amount of air commensurate with the amount of combustion immediately before fire extinguishing, efficiently burning unburned gas remaining in the combustion section and reducing odor itself. Can be reduced.

Further, since the application of the brake to the convection fan is stopped for a very short time thereafter, the electromagnetic noise generated when the brake is applied can be reduced, and the brake current can be reduced.

Further, when the convection fan is stopped, the temperature of the main body of the device rises. However, since the convection fan rotates strongly for a certain period of time, the temperature of the main body of the device is rapidly lowered to prevent overheating of the main body of the device. Inside the vaporization cylinder
Quenching the nozzle that faces the
The generation of unburned gas due to vaporization of the fuel can be prevented, and the convection fan rotates at a speed lower than the strong rotation thereafter, so that noise due to the rotation of the fan can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control device of an oil combustor of the present invention.

FIG. 2 is a flowchart of the apparatus.

FIG. 3 is a cross-sectional view showing an example of an oil combustor implementing the same device.

FIG. 4 is a block diagram showing a conventional example.

FIG. 5 is a flowchart of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Combustion part 5 Combustion pump 6 Burner fan 7 Convection fan 12 Combustion control part 13 Timer part 13a First timer part 13b Second timer part 13c Third timer part 13d Fourth timer part 14 Fan braking part

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F23N 5/20 F23N 5/20 101 F23N 3/08

Claims (1)

(57) [Claims] 1. A combustion section, a combustion pump for supplying fuel to the combustion section, a burner fan for supplying combustion air to the combustion section, and a combustion gas from the combustion section as hot air to the outside of the apparatus body. A convection fan that blows out, and a combustion control unit that drives the fuel pump, the burner fan, and the convection fan according to room temperature to control the amount of combustion in the combustion unit, and simultaneously stops the combustion and stops energizing the fuel pump and the burner fan. A timer section that is started by stopping the combustion and controls the energization of the convection fan and the burner fan; and a fan braking section that brakes the convection fan, wherein the timer section is started by stopping the combustion. A timer section,
A second timer section that is activated when the first timer section is counted up, a third timer section that is activated when the second timer section is counted up, and an activated when the third timer section is counted up. The first timer unit operates the fan braking unit for the convection fan until the time is up, and the second timer unit operates the fan unit for the convection fan until the count up. The energization is stopped, and the third timer unit energizes the convection fan to rotate strongly until it counts up.
The timer section energizes so as to rotate at a lower rotation speed than the strong rotation until counting up, and the first and second timer sections stop energizing the burner fan until counting up. And a third and fourth timer unit for controlling the oil combustor to energize the burner fan until the timer counts up.