JP3579948B2 - Combustion equipment - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus for vaporizing a liquid fuel and ejecting the vaporized gas from a nozzle to burn the gas.
[0002]
[Prior art]
Conventionally, in this type of combustion apparatus, as shown in FIG. 3, fuel is supplied to a tank 22 from a cartridge tank 23, and the fuel in the tank 22 is supplied to a vaporizer 25 by a pump 24. Then, the gas is vaporized by the vaporizing section 25 to become a fuel gas, and is ejected from the nozzle section 26 in the horizontal direction. The fuel ejected from the nozzle section 26 is ejected into a mixing pipe 27 provided at a position downstream of the vaporizing section 25 while sucking primary air by an ejector effect, and is mixed there. It is supplied to a line-shaped burner section 28 and burned there. In the vicinity of the burner section 28, a flame rod type combustion sensor 30 for detecting a combustion state by applying a current to the flame electrode 29 and the burner section 28 and detecting the combustion state is provided. An ignition electrode 32 of an ignition means 31 is provided separately between the burner unit 28 and a high-pressure discharge between the burner unit 28 and the discharge to start combustion of the burner unit 28. The generated combustion gas is guided upward by a combustion tube 33 disposed so as to cover the periphery of the burner portion 28, and mixed with a room air flow from a blower 35 by a duct 34 covering the combustion tube 33, It is discharged as warm air and used for heating. When the fuel supply amount is adjusted by changing the drive frequency or applied voltage of the pump 24, the amount of primary air increases and decreases accordingly, and the combustion amount is changed while the fuel-to-air ratio is kept constant. Can be done.
[0003]
[Problems to be solved by the invention]
However, in such a conventional combustion device, the frame electrode 29 of the combustion sensor 30 for detecting the combustion state and the ignition electrode 32 of the ignition means 31 are positioned with respect to the position of the burner 28, and especially the ignition electrode 32 is The distance to the position with respect to the portion is important, and may affect the combustion detection and ignition performance.
[0004]
That is, in the vicinity of the burner section 28, a flame rod type combustion sensor 30 which detects a combustion state by applying a current to the flame electrode 29 and the burner section 28 put in the combustion flame and detecting the amount of combustion is provided with the burner section 28. The resistance fluctuates due to the unevenness of the ion concentration that passes the current of the combustion flame caused by the fluctuation of the position of the frame electrode 29 and the distance to the burner section 28, the flowing current value changes, and the combustion state of the burner section 28 can be accurately detected. There was a difficult problem.
[0005]
In addition, the ignition electrode 32 of the ignition means 31 which is disposed near the burner portion 28 and which starts high-pressure discharge between the burner portion 28 and the combustion of the burner portion 28 by the discharge is provided. When the distance to the cylinder 33 is short, the discharge does not fly to the burner part but flies to another part, for example, the combustion cylinder 33, depending on the conditions such as dew condensation, humidity, and dust. there were.
[0006]
In addition, if the mounting is disjointed, metal fittings and screws are required for the mounting, the configuration becomes complicated, the cost is increased, and there is a problem that the positional accuracy is hardly obtained.
[0007]
The present invention has solved the above-mentioned problem, and the frame electrode 29 of the combustion sensor 30 and the ignition electrode 32 of the ignition means 31 are integrally configured to reduce the number of components, simplify the configuration, and facilitate the mounting accuracy. The purpose of the present invention is to reduce costs and prevent erroneous wiring and mounting between the frame electrode 29 and the ignition electrode 32.
[0008]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention detects a combustion state by measuring a quantity of a burner, a frame electrode disposed near the burner and facing a combustion flame, and measuring an amount of the current by flowing a current to the burner. A combustion sensor of a flame rod type, and ignition means of a high pressure discharge type arranged near the burner portion and discharging between the ignition electrode and the burner portion to start combustion of the burner portion, The frame electrode of the sensor and the ignition electrode of the ignition means are integrally formed with an insulator, and when a connector is connected to the frame electrode and the ignition electrode, the wire diameter of the frame electrode is made larger than the wire diameter of the ignition electrode to cause incorrect wiring. This constitutes prevention means .
[0009]
[Action]
In the present invention, since the flame electrode of the combustion sensor and the ignition electrode of the ignition means are separated and integrally formed with the insulator as described above, the number of components is reduced, the number of mounting brackets becomes unnecessary, and the number of components is reduced. In addition, the frame electrode 29 and the ignition electrode 32 can be prevented from being erroneously mounted, and the mounting accuracy can be easily obtained, and the cost can be reduced. Further, since the frame electrode has a larger wire diameter than the ignition electrode, it is possible to prevent erroneous wiring between the frame electrode and the ignition electrode, and to reduce the shape change of the frame electrode having a complicated shape over time. And the combustion detection can be stably obtained .
[0010]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
First, the configuration of a hot air heater using the combustion apparatus of the present invention will be described with reference to FIG. 1. Reference numeral 1 denotes a main body case, a tank 2 holding liquid fuel at a lower side thereof, and a tank 2 attached to and detached from the upper part of the tank 2. A flexible cartridge tank 3 is provided. Reference numeral 4 denotes a pump mounted on the upper surface of the tank 2, which supplies fuel from an upper end thereof to a vaporizing section 6 through an oil feed pipe 5. Reference numeral 7 denotes a nozzle section for horizontally ejecting the fuel gas vaporized by the vaporizing section 6, and the fuel ejected from the nozzle section 7 moves to the downstream side of the vaporizing section 6 while sucking primary air by an ejector effect. The mixture is jetted into the provided mixing tube 8, mixed therein, supplied to a line-shaped burner unit 9 integrated with the mixing tube 8, and burned there.
[0012]
Reference numeral 10 denotes a flame rod type combustion sensor which is disposed in the vicinity of the burner portion 9 and faces the combustion flame, and supplies a current to the burner portion 9 to measure the amount thereof and detect a combustion state. Similarly, a high-pressure discharge type ignition means which is disposed adjacent to and adjacent to the burner portion 9 and discharges between the ignition electrode 13 and the burner portion 9 to start combustion of the burner portion 9 by the discharge. The electrode 11 and the ignition electrode 13 of the ignition means 12 are separated from each other as shown in FIG. 2 to be integrally formed with the insulator 14, the frame electrode 11 has a larger wire diameter than the ignition electrode 13, and the gap between the frame electrode 11 and the ignition electrode 13 A hole 15 for mounting is provided on the insulator 14 at a distance from the frame electrode 11 to the ignition electrode 13, and is screwed to a mounting plate 16 of the burner 9.
[0013]
Numeral 17 denotes a combustion cylinder for guiding the combustion gas from the burner section 9 upward, and a blower 18 for taking in and sending out the indoor air flow is disposed at the back thereof. Reference numeral 19 denotes a duct which mixes the combustion gas from the combustion tube 17 with the indoor air flow to generate hot air. A control unit 20 controls the pump 4 and the blower 8 to burn the burner unit 9, and controls the pump 4 and the blower 8 in a predetermined sequence based on an operation condition signal input from the operation unit 21. It has become.
[0014]
In the above configuration, the liquid fuel supplied from the cartridge tank 3 to the tank 2 so as to maintain a constant oil level is sucked up from the tank 2 by the pump 4 and sent to the vaporizer 6 via the oil feed pipe 5. The sent fuel is vaporized in the vaporizing section 6 maintained at a predetermined temperature or higher by the heater, becomes high-pressure fuel gas, and is ejected from the nozzle section 7. At this time, the vaporizing section 6 sucks the primary air by an ejector effect. Are mixed in a mixing pipe 8 provided on the downstream side, and supplied into the burner section 9, and are ejected from the flame holes of the burner section 9. Here, when a high voltage is intermittently applied between the ignition electrode 13 and the burner section 9, a discharge is generated between the ignition electrode 13 and the burner section 9 to form a flame in a flame hole of the burner section 9 and burn. Even if the discharge is stopped, if the pump 4 continues to supply the fuel to the vaporizing section 6 as it is, the combustion will continue. Then, the generated combustion gas flows above the combustion cylinder 17, is mixed with the indoor air flow from the blower 18 in the duct 19, is discharged as warm air, and is used for heating. The control unit 20 controls the pump 4, the blower 8, and the like in a predetermined sequence based on the conditions set by the operation unit 21 to perform operation control such as variable combustion amount and the like. In response to the output of the combustion sensor 10 obtained by measuring the amount of current by flowing a current between the frame electrode 11 and the burner section 9 facing the vicinity of the combustion flame and detecting the combustion state, A warning is issued.
[0015]
Here, the ignition electrode 13 of the igniting means 12 which starts high-pressure discharge between the burner unit 9 and the combustion of the burner unit 9 by the discharge is likely to fly to another portion without discharging to the burner unit 9. The frame electrode 11 of the combustion sensor 10 which has a simple shape and is separated from the surroundings by a predetermined distance, and which is put into a combustion flame to flow a current between the burner unit 9 and measure the amount to detect a combustion state is provided. However, the shape is complicated in order to make it easy to take the ion current in the combustion flame.
[0016]
However, since the frame electrode 11 of the combustion sensor 10 and the ignition electrode 13 of the ignition means 12 are separated from each other and are integrally formed with the insulator 14, the number of components can be reduced, the mounting bracket is not required, and the number of components is reduced. As a simplicity, the erroneous attachment of the frame electrode 11 and the ignition electrode 13 can be prevented, the attachment accuracy can be easily improved, the combustion detection and the ignition performance can be improved, and the material cost and the number of assembly steps can be reduced, so that the cost can be reduced.
[0017]
That is, in the vicinity of the burner section 9, the flame rod type combustion sensor 12 that detects the combustion state by applying a current to the flame electrode 11 and the burner section 9 facing the combustion flame and detecting the combustion state is provided. Since the positional relationship between the burner and the flame electrode 10 is stable, the value of the flowing current does not change depending on the ion concentration of the combustion flame or the distance from the burner 9, and the combustion state of the burner can be accurately detected.
[0018]
Further, since the mounting hole 15 is provided on the insulator 14 between the frame electrode 11 and the ignition electrode 13 at a distance from the frame electrode 11 toward the ignition electrode 13, the ignition electrode 13 and other parts are not provided. The space distance can be increased, the discharge does not easily fly to other parts, the mounting accuracy is good, and the ignitability is improved.
[0019]
Further, since the wire diameter of the frame electrode 11 is larger than that of the ignition electrode 13, it is possible to prevent erroneous wiring between the frame electrode 11 and the ignition electrode 13. In addition to eliminating the concern of combustion detection, it is possible to reduce the change in shape of the frame electrode having a complicated shape over time, and to stably obtain combustion detection.
[0020]
In the above-described embodiment, the frame electrode 11 of the combustion sensor 10 and the ignition electrode 13 of the ignition means 12 are separated and integrally formed with the insulator 14, the frame electrode 11 has a larger wire diameter than the ignition electrode 13, and The configuration in which the mounting hole 15 is disposed on the insulator 14 between the frame electrode 11 and the ignition electrode 13 at a distance from the frame electrode 11 toward the ignition electrode 13 has been described at the same time. The configuration of each unit may be any configuration as long as the object of the present invention is achieved.
[0021]
【The invention's effect】
As described above, the combustion device of the present invention separates the flame electrode of the combustion sensor and the ignition electrode of the ignition means and integrally molds them with an insulator, and makes the wire diameter of the frame electrode larger than the wire diameter of the ignition electrode. Reduces the number of components and simplifies the configuration, making it easier to assemble the unit more accurately, reducing costs, and preventing miswiring between the frame electrode and the ignition electrode, while reducing the shape change of the frame electrode and burning. Detection can be stabilized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a hot air heater in one embodiment of the present invention. FIG. 2 is a detailed view of a main part of the combustion device. FIG. 3 is a cross-sectional view of a hot air heater using a conventional combustion device. Description]
9 Burner part 10 Combustion sensor 11 Frame electrode 12 Ignition means 13 Ignition electrode 14 Insulator 15 Mounting hole

Claims (1)

A burner portion, a frame electrode disposed near the burner portion and facing the combustion flame, a flame rod type combustion sensor for detecting a combustion state by applying a current to the burner portion and measuring the amount thereof; A high-pressure discharge type ignition means which is disposed near the burner part and discharges between the ignition electrode and the burner part to start combustion of the burner part, wherein the ignition of the flame electrode of the combustion sensor and the ignition means is provided. A combustion device in which an electrode is integrally formed with an insulator and a wire diameter of the frame electrode is made larger than a wire diameter of the ignition electrode when a connector is connected to the frame electrode and the ignition electrode, thereby constituting a miswiring prevention means.

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