JP3191604B2 - Combustion 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 combustion control apparatus for a combustion apparatus in which a vaporized gas is ejected from a nozzle and burned.

[0002]

2. Description of the Related Art Conventionally, this type of combustion equipment, for example, an open petroleum combustion equipment, is constructed as shown in FIGS.
That is, in FIG. 1, reference numeral 1 denotes a main body case, on which a tank 2 for holding liquid fuel is provided on a lower side thereof, and a detachable cartridge tank 3 is provided above the tank 2. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, and supplies a fuel from an upper end thereof to a vaporizing section 6 through an oil feed pipe 5.

[0003] The vaporizing section 6 is formed in a donut shape so that a mixing pipe 7 protrudes at the center thereof and surrounds the mixing pipe 7.
Is arranged. Reference numeral 10 denotes a communication passage provided to the nozzle unit 11 on the side opposite to the mixing pipe 7 with respect to the inlet of the oil feed pipe 5 of the vaporization unit 6. A return pipe 12 and an electromagnetic solenoid 13 connected to the tank 2 are connected to the nozzle 11, and the electromagnetic solenoid 13 is connected to the nozzle 1.
A needle valve 14 that opens and closes one nozzle hole 11A is provided.

A burner 15 is mounted on the vaporizer 6 so as to cover the outlet of the mixing tube 7. The burner 15 is a high-pressure discharge type or the like which ignites a vaporized gas ejected from a flame hole 16 formed on the peripheral wall thereof. Means 17 are provided. 18 is the burner part 15
A combustion tube for guiding the combustion gas from the combustion chamber upward, and a blower 19 for taking in and sending out the indoor air flow is disposed behind the combustion cylinder. 2
Reference numeral 0 denotes a duct that mixes the combustion gas from the combustion tube 7 with the indoor air flow to generate hot air.

[0005] Further, as shown in FIG.
A combustion control unit that drives and controls the heater 8, the electromagnetic solenoid 13, the ignition means 17, the blower 19, and the like.
The control is performed in a predetermined sequence based on the operating condition signal input from the control unit 2 and the sensor output of the temperature detecting means 9 and the like.

In the above configuration, the vaporizing section 6 is heated to a predetermined temperature by the heater 8 and vaporizes oil entering from the inlet of the oil feed pipe 5 in the process of reaching the communication passage 10. The vaporized gas flows downward through the communication passage 10 below the vaporization section 6 and reaches the nozzle section 11. In this state, when the electromagnetic solenoid 13 is operated to drive the needle valve 14 to open the nozzle hole 11A, vaporized gas is ejected from the nozzle 11, and the vaporized gas flows through the mixing pipe 7 while sucking and mixing the surrounding air. Is supplied to the burner section 15 through the
It starts to squirt from the part.

When the ignition means 17 is operated, a uniform flame is formed in the large number of flame holes 16 to start combustion. Even if the ignition means 17 is stopped, the pump 4 supplies the fuel to the vaporizing section 6 as it is. If it continues, combustion will continue.

The generated combustion gas is guided upward by a combustion tube 18 disposed so as to cover the periphery of the burner 15, and mixed with a room air flow from a blower 19 by a duct 20 covering the combustion tube 18. It is discharged as warm air and used for heating. The petroleum-fired equipment is controlled by the combustion control unit 21 based on an operation condition signal input from the operation unit 22 and the like.
When the fuel supply amount is adjusted by changing the drive frequency or the applied voltage of the pump 4, the primary air amount also increases and decreases, and the combustion amount can be changed while the fuel-to-air ratio is kept constant. I have.

Here, the operation at the start of combustion will be described in detail. When the operation switch is turned on, the electromagnetic solenoid 13 is actuated, the needle valve 14 closes the nozzle portion 11, and the pump 4 is driven as it is. Heater 8
And the vaporization unit 6 is heated. That is,
The temperature of the vaporizing section 6 is raised while filling the vaporizing section 6 with the vaporized gas, and the internal pressure of the vaporizing section 6 is increased. Then, when the temperature detecting means 9 detects that the internal pressure of the vaporizing section 6 has sufficiently increased and the temperature of the vaporizing section 6 has reached a predetermined temperature, the electromagnetic solenoid 13 operates and the needle valve 14 opens the nozzle section 11, The vaporized gas gushes vigorously. The vaporized gas is sucked and mixed with the surrounding air while being mixed with the burner unit 1 through the mixing pipe 7.
5 and is ejected from the flame hole 16. Here, when the ignition means 17 is operated, a large number of flame holes 1 are formed.
6, a uniform flame is formed to start combustion, and ignition means 17
If the pump 4 continues to supply fuel to the vaporizing section 6 as it is, combustion will continue.

[0010]

However, in the case of the combustion apparatus having such a configuration, however, the connector of the electromagnetic solenoid 13 may be forgotten to be inserted, or the sliding portion of the needle valve 14 may be clogged with debris and may not move. However, it is not possible to detect this, and a large amount of vaporized gas leaks before the start of combustion, and odors and leaked vaporized gas dew condenses, and an explosion in which a large amount of vaporized gas burns at the time of ignition There was a risk of ignition.

That is, when the electromagnetic solenoid 13 does not operate and the needle valve 14 does not close the nozzle portion 11, the vaporized gas leaks from the nozzle portion 11 until the ignition means is operated, and the vaporized gas leaks from the nozzle portion 11 and around the combustion device. There is a risk that the leaked vaporized gas will condense on the surroundings, become tarred, adhere and contaminate, and become a constant odor that has soaked in the combustion equipment. Was.

Further, when the ignition is performed by operating the ignition means 17 in such a state, the internal pressure of the vaporizing section 6 is not sufficiently increased, so that the ejection of the vaporized gas does not increase so much, and the suction of the surrounding air is weak. As a result, there is a problem that the ratio of air to fuel is small and ignition is difficult. Further, even if the ignition is performed in a state in which the above-mentioned vaporized gas is filled, since a large amount of the vaporized gas is instantaneously ignited, the state becomes explosive ignition, and there is a problem that a sense of danger or a strong smell is generated. Was.

A first object of the present invention is to solve the above-mentioned problem, and it is a first object of the present invention to safely ignite even when the needle valve cannot close the nozzle portion for some reason. The second object is to improve the ignitability and to prevent a feeling of cold air when used as a warm air heater.

[0014]

In order to achieve the first object, the present invention provides a vaporizing section for vaporizing fuel supplied from a pump, a heater for heating the vaporizing section, and a method for controlling the temperature of the vaporizing section. Temperature detecting means for detecting, a nozzle portion for ejecting gas vaporized in the vaporizing section, a needle valve for opening and closing the nozzle portion to eject and stop the vaporized gas ejected from the nozzle portion, and a needle valve for ejecting the gas from the nozzle portion. A burner section for burning the gas, ignition means for igniting the gas from the burner section, and a pair for sucking indoor airflow as warm air air
Diverted blower (hereinafter, referred to as a blower) and the pump, heater, a needle valve, ignition means, burning the start of operation of the convection blower such as a drive control to the instrument, stop, and a combustion control unit for controlling the combustion conditions, etc. And the combustion control unit comprises:
At the start of the combustion operation, the heater is energized, the pump is driven while the nozzle is closed with the needle valve, and when the temperature of the vaporizing section reaches a predetermined temperature, the convection blower is driven to generate excess vaporized gas in the burner section. While sucking and discharging
After a lapse of a predetermined time, the convection blower is stopped to activate the ignition means, and a combustion start control section is provided for driving the needle valve to open the nozzle portion and eject the vaporized gas to start combustion.

[0015] Alternatively the combustion control unit is configured to energize the combustion operation start heater, a pump driven operation while closing the nozzle portion with the needle valve, when the temperature of the vaporization section reaches a first predetermined temperature, convection The air blower is driven to suck and discharge excess vaporized gas from the burner section, and when the temperature of the vaporizing section reaches the second predetermined temperature, the convection blower is stopped to activate the ignition means, and the needle valve is turned on. The apparatus is provided with a combustion start control unit that is driven to open the nozzle unit and ejects vaporized gas to start combustion.

Further, in order to achieve the second object, the combustion start control unit drives the blower at the maximum drive output for several seconds and then reduces the drive output to reduce the number of revolutions, thereby removing excess vaporized gas from the burner unit. A configuration that discharges, or a combustion start control unit that drives a blower to discharge excess vaporized gas from a burner unit, and then brakes and stops the blower, or a combustion start control unit. After the blower is driven at the maximum drive output for several seconds, the drive output is reduced to reduce the number of revolutions, thereby discharging excess vaporized gas from the burner section, and then applying a brake to the blower to stop the blower. .

[0017]

According to the present invention, even if the needle valve cannot close the nozzle portion for some reason and the vaporized gas continues to leak due to the above-mentioned structure, the excess vaporized gas leaking from the nozzle portion is discharged before the ignition operation. Thus, explosive ignition can be prevented.

When the temperature of the vaporizing section reaches the first predetermined temperature, the blower is driven to discharge excess vaporized gas from the burner section, and when the temperature of the vaporizing section reaches the second predetermined temperature, the blower is activated. In the case of stopping and activating the ignition means, and driving the needle valve to open the nozzle portion and eject the vaporized gas to start combustion, excess vaporized gas leaking from the nozzle portion is ignited. The discharge can be performed at a good timing and reliably before the operation.

Further, in the apparatus in which the blower is driven at the maximum drive output for several seconds, the drive output is reduced to reduce the number of revolutions, thereby discharging excess vaporized gas from the burner. It is possible to reduce the amount of air blow while surely reducing the sense of discomfort such as the feeling of cool air before the ignition and the sound of the air blow.

Then, after the blower is driven to discharge the excess vaporized gas from the burner, the blower is braked and stopped, so that the wind is sent to the vicinity of the ignition means at the time of ignition. Can be prevented, and the ignitability is improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. The same parts as those of the conventional example will be denoted by the same reference numerals, and the description thereof will be omitted. 21 is provided with a combustion start control unit 23 that drives and controls the pump 4, the heater 8, the electromagnetic solenoid 13, the ignition means 17, the blower 19, and the like according to a predetermined sequence at the start of combustion.

The combustion start controller 23 is configured to perform the operation described in the flowchart of FIG. 2, FIG. 3, FIG. 4, or FIG. 5, and the configuration will be described below together with the operation.

First, the case shown in FIG. 2 will be described. When the operation switch is turned on, the combustion start control unit 23 energizes the electromagnetic solenoid 13 to close the nozzle unit 11 with the needle valve 14 and energizes the heater 8 at the same time. Then, the heating of the vaporizing section 6 is started. The temperature of the vaporizing section 6 rises and the temperature detecting means 9
When the predetermined temperature A is detected, the driving operation of the pump 4 is started to supply the fuel to the vaporizing section 6, the temperature of the vaporizing section 6 rises, and the vaporizing section 6 is gradually filled with the vaporized gas. Then, when the temperature of the vaporizing section 6 further rises and the temperature of the temperature detecting means 9 reaches the predetermined temperature B, the blower 19 is energized at 24 to suck the vaporized gas in the combustion cylinder 18 and to remove the excess gas from the burner section 15. Discharges various vaporized gases.

When a predetermined time has elapsed since the blower 19 was energized, the energization of the blower 19 is stopped at 25. Next, the ignition means 17 is operated, and the needle valve 14 is operated to open the nozzle portion 11.
Spray more vaporized gas. As a result, the vaporized gas is sucked and mixed with the surrounding air while being mixed with the burner 1 through the mixing pipe 7.
The fuel gas is supplied into the fuel cell 5 and is ejected from the flame hole 16 to start combustion. Combustion is started by forming a uniform flame in the large number of flame holes 16, and even if the ignition means 17 is stopped, if the pump 4 continues to supply the fuel to the vaporizing section 6 as it is, the combustion will continue. The start control unit 23 ends its role.

As described above, since the combustion start control unit 23 controls the combustion equipment, the needle valve 14 is controlled for some reason.
When an abnormal state occurs in which the nozzle portion 11 cannot be closed, when the combustion device is operated, since the blower 19 is energized immediately before the ignition means 17 is operated and excess vaporized gas leaking from the nozzle portion 11 is discharged, Explosive ignition can be prevented.

Next, the case shown in FIG. 3 will be described. When the operation switch is turned on, the combustion start control unit 23 energizes the electromagnetic solenoid 13 to close the nozzle unit 11 with the needle valve 14 and simultaneously turns on the heater 8. Electricity is supplied to start heating the vaporizing section 6. Next, when a predetermined time elapses after the operation switch is turned on, the driving operation of the pump 4 is started, fuel is supplied to the vaporizing section 6, the temperature of the vaporizing section 6 rises, and the vaporized gas is gradually supplied to the vaporizing section 6. Fill up. Then, when the temperature of the vaporizing section 6 further rises and the temperature of the temperature detecting means 9 reaches the first predetermined temperature, the blower 19 is energized at 24 and sucks the vaporized gas in the combustion cylinder 18 to burn the burner section 15. Exhaust gas is exhausted.

When the temperature of the vaporizing section 6 further rises and reaches the second predetermined temperature, the power supply to the blower 19 is stopped at 25. Next, the ignition means 17 is operated, and at the same time, the needle valve 14 is operated to open the nozzle portion 11, and the vaporized gas is ejected from the nozzle portion 11. As a result, the vaporized gas is supplied into the burner section 15 through the mixing pipe 7 while sucking and mixing the surrounding air, and is ejected from the flame hole 16 to start combustion. Combustion is started by forming a uniform flame in the large number of flame holes 16, and even if the ignition means 17 is stopped, if the pump 4 continues to supply the fuel to the vaporizing section 6 as it is, the combustion will continue. Start control unit 23
Ends its role.

As described above, the combustion start control section 23 detects the temperature of the vaporizing section 6 and controls the temperature based on the detected temperature. Therefore, the control of discharging excess vaporized gas leaking from the nozzle section 11 is performed with good timing and accuracy. Will be able to do it.

Next, the case shown in FIG. 4 will be described. When the operation switch is turned on, the combustion start control unit 23 energizes the electromagnetic solenoid 13 to close the nozzle unit 11 with the needle valve 14 and simultaneously turns on the heater 8. Electricity is supplied to start heating the vaporizing section 6. Next, when a predetermined time elapses after the operation switch is turned on, the driving operation of the pump 4 is started, fuel is supplied to the vaporizing section 6, the temperature of the vaporizing section 6 rises, and the vaporized gas is gradually supplied to the vaporizing section 6. Fill up. When the temperature of the vaporizing section 6 further rises and the temperature of the temperature detecting means 9 reaches the first predetermined temperature, the blower 19 is energized for a few seconds, for example, for 2 seconds with the maximum energizing amount. The burner unit 15 is driven by reducing the amount of electricity so as to draw the vaporized gas in the combustion tube 18 and discharge the excess vaporized gas from the burner unit 15.

When the temperature of the vaporizing section 6 further rises and reaches the second predetermined temperature, the energization of the blower 19 is stopped at 28. Next, the ignition means 17 is operated, and at the same time, the needle valve 14 is operated to open the nozzle portion 11, and the vaporized gas is ejected from the nozzle portion 11. Thereby, the vaporized gas sucks and mixes the surrounding air while mixing the pipe 7.
The fuel is supplied into the burner 15 through the nozzle and is ejected from the flame hole 16 to start combustion. Then, a uniform flame is formed in the large number of flame holes 16 to start combustion, and even if the ignition means 17 is stopped, the fuel continues to be supplied to the vaporizing section 6 by the pump 4 to continue the combustion. Start control unit 23
Ends its role.

As described above, in the case of the combustion start control unit 23, after the blower 19 is driven at the maximum drive output for only a few seconds, the drive output is reduced so as to make a slight rotation. In addition to the above, the blower 19 can be reliably started even on a cold day, and the rotation speed is controlled so as not to be too high after the start. There is an advantage that no sound or the like is generated. That is,
The flow of the wind from the blower 19 before the ignition feels a cool wind feeling, and if the blower 19 is started by a slight rotation to eliminate the cool wind feeling, there is a concern that the blower 19 is hard to start at a low voltage or at a low temperature and does not rotate. According to the combustion start control unit 23, such a problem can be solved.

Next, the case shown in FIG. 5 will be described. When the operation switch is turned on, the combustion start control unit 23 energizes the electromagnetic solenoid 13 and activates the nozzle unit 1 with the needle valve 14.
At the same time as closing 1, the heater 8 is energized to start heating the vaporizing section 6. Next, when a predetermined time elapses after the operation switch is turned on, the driving operation of the pump 4 is started, fuel is supplied to the vaporization unit 6, and the temperature of the vaporization unit 6 rises and the vaporization unit 6
The vaporized gas gradually fills. Then, when the temperature of the vaporizing section 6 further rises and the temperature of the temperature detecting means 9 reaches the first predetermined temperature, the blower 19 is energized and driven in 29 to suck the vaporized gas in the combustion tube 18 to drive. Excess vaporized gas from the burner section 15 is discharged.

When the temperature of the vaporizing section 6 further rises and reaches a second predetermined temperature, the current of the DC component is instantaneously supplied to the blower 19 at 30, for example, for one second, and the rotation of the blower 19 is stopped instantaneously. . Next, the ignition means 17 is operated, and at the same time, the needle valve 14 is operated to open the nozzle portion 11, and the vaporized gas is ejected from the nozzle portion 11. As a result, the vaporized gas is supplied into the burner section 15 through the mixing pipe 7 while sucking and mixing the surrounding air, and is ejected from the flame hole 16 to start combustion. Combustion is started by forming a uniform flame in the large number of flame holes 16, and even if the ignition means 17 is stopped, if the pump 4 continues to supply the fuel to the vaporizing section 6 as it is, the combustion will continue. The start control unit 23 ends its role.

As described above, in the case of the combustion start control unit 23, the DC component current is instantaneously supplied to the blower 19 and the rotation of the blower 19 is stopped instantaneously before ignition. In addition to the effect of
When the is operated, the wind from the blower 19 does not blow into the ignition portion, and reliable ignition can be expected. That is, if there is a wind flow near the ignition means 17 at the time of ignition, the vaporized gas ejected from the flame hole 16 is disturbed and the ignitability deteriorates. However, when this combustion start control unit 23 is used, such a problem occurs. Can also be solved.

In the above-described embodiment, the driving operation of the pump 4 is started when the temperature of the vaporizing section is equal to or higher than the predetermined temperature A or when a predetermined time elapses after the operation switch is turned on. If the temperature detection means 9 reaches the first predetermined temperature, the blower 19 is energized for a few seconds with the energization amount set to a maximum, and then the energization amount is set so as to make a slight rotation. The configuration in which the drive is lowered and the configuration in which the temperature detection means 9 raises the temperature to the second predetermined temperature and instantaneously supplies a DC component current to the blower 19 to instantaneously stop the rotation of the blower 19 have been individually described. These components may be combined with each other, including each drive start time of the pump 4, and other components may have any configuration as long as the object of the present invention is achieved.

[0036]

As described above, in the combustion control apparatus of the present invention, even if the needle valve cannot close the nozzle portion for some reason and the vaporized gas continues to leak, the combustion control device according to the present invention has an extra leak from the nozzle portion. Since the vaporized gas is discharged before the ignition operation, explosive ignition can be prevented.

When the temperature of the vaporizing section reaches the first predetermined temperature, the blower is driven to discharge excess vaporized gas from the burner section, and when the temperature of the vaporizing section reaches the second predetermined temperature, the blower is activated. In the case of stopping and activating the ignition means, and driving the needle valve to open the nozzle portion and eject the vaporized gas to start combustion, excess vaporized gas leaking from the nozzle portion is ignited. The discharge can be performed at a good timing and reliably before the operation.

Further, in the apparatus in which the blower is driven at the maximum drive output for several seconds, the drive output is reduced to reduce the number of revolutions, thereby discharging excess vaporized gas from the burner section. , The amount of air blow is suppressed, and the sense of discomfort such as the feeling of cool air before the ignition and the sound of the air blow can be reduced.

Also, in the case where the blower is driven to discharge the excess vaporized gas from the burner portion, the blower is braked and stopped, so that the wind is blown near the ignition means at the time of ignition. It can be prevented from coming and ignitability is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of a combustion control device according to an embodiment of the present invention.

FIG. 2 is a flowchart of the control device.

FIG. 3 is a flowchart of a control device according to another invention.

FIG. 4 is a flowchart of a control device according to another invention.

FIG. 5 is a flowchart of a control device in another invention.

FIG. 6 is a cross-sectional view of an oil-fired device using the present invention and a conventional combustion control device.

FIG. 7 is a sectional view of a main part of the oil-fired equipment.

FIG. 8 is a block diagram showing a conventional combustion control device.

[Explanation of symbols]

 Reference Signs List 4 pump 6 vaporizer 8 heater 9 temperature detector 11 nozzle 14 needle valve 15 burner 17 ignition unit 19 blower 21 combustion controller 23 combustion start controller

Continuation of the front page (56) References JP-A-6-3441639 (JP, A) JP-A-58-128350 (JP, U) JP-A-3-21648 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) F23N 1/02 F23D 11/02 F23N 5/02 342 F24H 3/04 305

Claims (5)

(57) [Claims] 1. A vaporizing section for vaporizing fuel supplied from a pump, a heater for heating the vaporizing section, temperature detecting means for detecting a temperature of the vaporizing section, and ejecting gas vaporized by the vaporizing section. A nozzle portion, a needle valve for opening and closing the nozzle portion to eject and stop a vaporized gas ejected from the nozzle portion, a burner portion for burning the gas ejected from the nozzle portion, and igniting the gas from the burner portion Ignition means and convection that sucks indoor airflow as air for warm air
With a use blower, the pump, heater, a needle valve, ignition means, the instrument of the combustion opening operation <br/> start convection blower such as a drive control to stop, and a combustion control unit for controlling the combustion conditions, etc. The combustion control unit energizes the heater at the start of the combustion operation , drives the pump while the nozzle unit is closed with the needle valve, and drives the convection blower when the temperature of the vaporization unit reaches a predetermined temperature. Excess vaporized gas from the burner is sucked and discharged, and after a predetermined time elapses, the convection blower is stopped to activate the ignition means, and the needle valve is driven to open the nozzle to release the vaporized gas. A combustion control device provided with a combustion start control unit that starts combustion by injecting fuel. 2. A vaporizing section for vaporizing fuel supplied from a pump, a heater for heating the vaporizing section, temperature detecting means for detecting a temperature of the vaporizing section, and ejecting gas vaporized by the vaporizing section. A nozzle portion, a needle valve for opening and closing the nozzle portion to eject and stop a vaporized gas ejected from the nozzle portion, a burner portion for burning the gas ejected from the nozzle portion, and igniting the gas from the burner portion Ignition means and convection that sucks indoor airflow as air for warm air
With a use blower, the pump, heater, a needle valve, ignition means, the instrument of the combustion opening operation <br/> start convection blower such as a drive control to stop, and a combustion control unit for controlling the combustion conditions, etc. The combustion control unit energizes the heater at the start of the combustion operation , drives the pump while the nozzle unit is closed with the needle valve, and operates the convection blower when the temperature of the vaporization unit reaches the first predetermined temperature. It drives and sucks and discharges excess vaporized gas from the burner, and the temperature of the vaporized
When a predetermined temperature is reached, the convection blower is stopped, the ignition means is activated, and the needle valve is driven to open the nozzle portion to eject the vaporized gas to start the combustion, and the combustion control provided with the combustion start control portion. apparatus. 3. The combustion start control section drives the convection blower at the maximum drive output for several seconds, and then reduces the drive output to reduce the number of revolutions, thereby absorbing excess vaporized gas from the burner section.
3. The combustion control device according to claim 1, wherein the combustion control device is adapted to pull and discharge the fuel. 4. A combustion start controller 50 drives the convection blower sucking excess vaporized gas of the burner unit, after draining, before
The combustion control device according to claim 1 or 2, wherein a brake is applied to the convection blower to stop the convection blower. 5. The combustion start control section drives the convection blower with the maximum drive output for several seconds, and then reduces the drive output to reduce the number of revolutions, thereby absorbing excess vaporized gas from the burner section.
The combustion control device according to claim 1 or 2, wherein the convection blower is pulled and discharged, and thereafter the convection blower is braked and stopped.