JP3018829B2 - 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 Generally, this kind of oil combustor has a problem that an odor is generated when a fire is extinguished. FIG. 4 shows a control block diagram of a conventional odor countermeasure. Reference numeral 31 denotes an operation command unit, and 32 receives an operation start / stop signal from the operation command unit 31 and operates a fuel pump 33, a burner fan 34, and a convection fan 35. The control unit is a combustion control unit which is started by stopping the combustion and includes a timer unit 36 for controlling the energization of the convection fan 35 and the burner fan 34, and a fan control unit 37 for applying a brake to the convection fan 35.

As shown in the flowchart of FIG. 5, the combustion control unit 32 stops the fuel pump 33 when the stop signal is input, temporarily stops the power supply to the burner fan 34, and simultaneously brakes the convection fan 35. After applying the power, the power supply is temporarily stopped to burn the unburned gas in the combustion section, and after a certain period of time, the burner fan 34 and the convection fan 35 are started at the same time so that the odor generated slightly is not released into the room. I have.

[0004]

However, in the above-described conventional configuration, the odor generated in the combustion section is prevented from being released into the room by braking the convection fan 35 and temporarily stopping the energization during fire extinguishing. However, if the convection fan 35 is stopped for an excessively long time, the temperature rise of the main body of the apparatus becomes large. This was a short time taken into consideration, and a sufficient odor control effect was not obtained. The burner fan 34 is also a convection fan 3.
Since the energization is stopped until 5 starts, the temperature of the fuel supply nozzle (not shown) facing the combustion section rises,
The liquid fuel remaining inside the nozzle gradually vaporized, and even after the fire was extinguished, a small amount of unburned gas was continuously released into the room, and the odor itself was also large.

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

[0006]

In order to achieve the above object, the present invention provides a combustion unit, a fuel pump for supplying fuel to the combustion unit, a burner fan for supplying combustion air to the combustion unit, and A convection fan that blows out combustion gas from the combustion unit as warm air to the outside of the device main body, a combustion amount setting unit that exhibits a combustion amount according to room temperature, and the fuel pump, the burner fan based on an output from the combustion amount setting unit, A combustion control unit that drives the convection fan to control the amount of combustion in the combustion unit, and at the same time stops the combustion, stops the energization of the fuel pump and the burner fan. A timer unit for controlling energization; and a fan braking unit for applying a brake to the convection fan.
A first timer unit comprising a timer unit, a second timer unit started when the first timer unit counts up, and a third timer unit started when the second timer unit counts up; Operates the fan braking unit to the convection fan until the time is up, the second timer unit stops energizing the convection fan until the count is up, and the third timer unit stops the power supply to the count up. During the operation, the convection fan is energized to rotate, the first timer unit stops energizing the burner fan until the count is up, and the second and third timer units are energized until the count is up. Electric power is supplied so as to rotate the fan, and the second timer unit changes its startup time according to the combustion amount at the time of extinguishing set by the combustion amount setting unit. Configure and Aru.

[0007]

According to the present invention, the convection fan is stopped instantaneously by the brake when the combustion is stopped by the brake, and the odor generated in the combustion portion is not released into the room. Since the stopping time of the gas can be lengthened, a sufficient odor prevention effect can be obtained. In particular, the effect is remarkable because the room temperature before the stop of combustion has risen and is weak in most cases. Also, by shortening the stop time of the burner fan, the temperature of the nozzle facing the combustion section rises, the liquid fuel remaining inside the nozzle evaporates gradually, and a small amount of unburned gas continues even after the fire is extinguished. Thus, it can be prevented from being released into the room.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

First, the structure of the combustor will be described with reference to FIG. 3. Reference numeral 1 denotes an apparatus main body, and 2 denotes a combustion section provided in the apparatus main body 1. The fuel is vaporized and mixed with combustion air. It comprises a vaporizing cylinder 3 and a burner unit 4 for burning a mixed gas from the vaporizing cylinder 3. 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 out hot air from the outlet 8. Reference numeral 9 denotes a control device which drives the fuel pump 5, the burner fan 6, and the convection fan 7 to control the amount of combustion and combustion.
It controls the combustion stop.

FIG. 1 shows a block diagram of the control device.
Reference numeral 10 denotes a room temperature setting unit, 11 denotes a room temperature detection unit, and 12A denotes a combustion amount setting unit for setting a combustion amount based on the outputs from the room temperature setting unit 10 and the room temperature detection unit 11. To be set. Reference numeral 12B denotes a combustion control unit for controlling the combustion based on the output from the combustion amount setting unit 12A, and sends a control signal to the fuel pump 5, the burner fan 6, and the convection fan 7. Reference numeral 13 denotes a timer section which starts when a combustion stop signal is received from the combustion control section 12B.
a, a second timer section 13b, and a third timer section 13c.
And sends the output to the convection fan 7. The second timer section 13b changes the timer time based on the output from the combustion amount setting section 12A. 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 that issues an operation / stop command to the combustion control unit 12.

In the above configuration, the operation of the control device will be described with reference to the flowchart of FIG. First, when the operation command is confirmed in step 16, the combustion control unit 12B
Starts combustion according to a predetermined program. When the combustion is confirmed in step 17, when the combustion control unit 12B sets the combustion amount to any one of high to low based on the outputs from the room temperature setting unit 10 and the room temperature detection unit 11, the signal is sent to the fuel pump 5, 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 issued from the combustion control unit 12B not only 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 but also when the room temperature from the room temperature detecting unit 11 is higher than the stop command from the operation command unit 15.

Next, when the combustion stop signal is confirmed in step 18, the combustion control unit 12B 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 1 whether or not the first timer unit 13a times out.
In step S9, 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 by inertia, so that a slight odor generated in the combustion part is not released into the room.

After the first timer section 13a counts up, the second timer section 13b is activated. According to the combustion amount setting unit 12A, that is, the combustion amount at the time of fire extinguishing, the second timer unit 13b extends the start-up time as the combustion amount decreases, and stops energizing the convection fan 7 during that time. Further, the power supply to the burner fan 6 is stopped until the first timer 13a counts up, and the power is supplied again simultaneously with the activation of the second timer 13b.

Therefore, according to this embodiment, when the combustion is stopped, the convection fan 7 is braked only for a very short time until the time-up of the first timer section 13a is confirmed in step 19, and thereafter, in step 20, the convection fan 7 is activated. The power supply to the convection fan 7 is stopped until the time-up of the second timer section 13b that changes with time according to the combustion amount is confirmed. Therefore, the lower the combustion amount at the time of fire extinguishing, the longer the convection fan 7 can be stopped, and the slight odor generated in the combustion part is not released into the room. Also, the power supply to the burner fan 6 is stopped only for a very short time until the time-up of the first timer unit 13a is confirmed, and thereafter the power supply is continued and the rotation is continued at a certain rotation speed. The temperature of the fuel is prevented from rising, and the liquid fuel remaining inside the nozzle is gradually vaporized, so that even after the fire is extinguished, a small amount of unburned gas is not continuously discharged into the room.

In step 20, the second timer unit 13
When the time-up of b is confirmed, the third
The convection fan 7 is energized until it is confirmed that the timer 13c has timed out.

[0016]

As is apparent from the above description of the embodiment, when the combustion stops, the present invention applies a brake to the convection fan and stops instantaneously. Since the convection fan can be stopped for a long time, it is possible to reliably prevent the odor generated in the combustion section from being released into the room.

Further, the power supply to the burner fan is stopped only for a very short time, and thereafter, the power is supplied to the burner fan, and the burner fan continues to rotate at a certain rotational speed. The liquid fuel is gradually vaporized, so that even after the fire is extinguished, a small amount of unburned gas is not continuously discharged into the room.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a control device of an oil combustor machine 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 Device main body 2 Combustion part 5 Fuel pump 6 Burner fan 7 Convection fan 12B Combustion control part 13 Timer part 13a First timer part 13b Second timer part 13c Third timer part 14 Fan braking part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-39518 (JP, A) JP-A-4-136463 (JP, U) JP-A-63-134251 (JP, U) Field (Int.Cl. ⁷ , DB name) F23N 5/20 101 F23N 5/20 F24H 3/04 305

Claims (1)

(57) [Claims] 1. 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 blowing out combustion gas from the combustion section as warm air to the outside of the apparatus body. A convection fan, a combustion amount setting unit that exhibits a combustion amount according to room temperature, and the fuel pump, the burner fan, and the convection fan are driven based on an output from the combustion amount setting unit to control the combustion amount in the combustion unit. Along with stopping the combustion, the fuel pump, a combustion control unit that stops energization of the burner fan, a timer unit that is started by the combustion stop and controls the energization of the convection fan and the burner fan, and brakes the convection fan. The timer unit includes a first timer unit that is started by stopping combustion, and is started when the first timer unit counts up. A second timer section, and a third timer section which is started when the second timer section is counted up, and the first timer section operates the fan braking section for the convection fan until the time is up. , Second
The timer section stops energizing the convection fan until counting up, the third timer section energizes the convection fan to rotate until counting up, and the first timer section counts up. And the second and third timer units are energized to rotate the burner fan until counting up, and the second timer unit is operated by the combustion amount setting unit. A control device for an oil combustor in which the start-up time changes according to the set combustion amount at the time of fire extinguishing.