JP2004317114A - Electrical discharge ignition device for combustor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the reliability and durability of an electrical discharge ignition device for a combustor by restraining breaking of a coil of an ignition transformer due to a heat shock. <P>SOLUTION: A high-voltage generator has an ignition transformer 13 for boosting the power supply voltage to a predetermined high voltage. The ignition transformer 13 has a primary coil 20 and a secondary coil 18. A connecting part 26 to an output pin 22 of the secondary coil 18 and an earth pin 23 has a first winding part 27 where the secondary coil 18 is wound round the root part of the pin and a second winding part 28 where the coil is wound round the tip part of the pin. In the second winding part 28, the secondary coil 18 is wound with higher density than in the first winding part 27. The output pin 22 of the ignition transformer 13 is connected to an output terminal. A discharge electrode of an ignition plug is electrically connected to an output terminal of the high voltage generator, thereby constituting this electrical discharge ignition device for a combustor. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a discharge ignition device used for various combustion appliances such as a gas combustion appliance and an oil combustion appliance.

  In various combustion appliances such as gas stoves and water heaters, a discharge ignition device is used as an ignition source. As a discharge igniter for a combustion appliance, a device that combines a high-voltage generator having an ignition transformer for boosting a power supply voltage to a predetermined high voltage and an ignition plug installed near a gas burner or the like is generally used. (For example, see Patent Documents 1 and 2). Such a discharge igniter ignites a gas burner or the like by generating a spark from a discharge electrode of an ignition plug by a secondary voltage boosted by an ignition transformer.

  As the ignition transformer of the discharge ignition device, for example, a transformer having a structure in which a magnetic core around which a primary winding is inserted is inserted into a center hole of a bobbin around which a secondary winding is wound on the outer peripheral side. . The bobbin is provided with a connection pin to which the primary winding is connected, an output pin to which the secondary winding is connected, and an earth pin. The ignition transformer is housed in an outer housing, and a resin sealing material is sealed in the outer housing. In such an ignition transformer, a very thin resin-coated copper wire having a wire diameter of, for example, 0.05 mm is used for the secondary winding so as to secure a sufficient number of turns and enable spark discharge.

The secondary winding as described above has its ends wound at high density around the roots of the output pin and the ground pin provided on the bobbin. The winding portion of the secondary winding is dipped in solder and is electrically connected to an output pin or an earth pin. In such a winding portion of the secondary winding around the output pin and the earth pin, when a solder shock is applied, when a resin sealing material is sealed, or when a heat shock is applied during use of the discharge ignition device, the secondary winding is wound around the secondary winding. There is a problem that disconnection easily occurs. In particular, when the high voltage generator of the discharge ignition device is installed in an atmosphere having a large temperature difference, for example, in a position near a burner, the secondary winding is likely to be disconnected due to a heat shock caused by the temperature difference in the use atmosphere. The disconnection of the secondary winding caused by such a heat shock causes a reduction in reliability and durability of the discharge ignition device.
JP 11-248155 A JP 11-294766 A

  As described above, in the conventional ignition transformer of a discharge igniter for a combustion appliance, there is a problem that the winding is easily disconnected when a heat shock is applied. In particular, since a fine resin-coated copper wire is used for the secondary winding, disconnection is likely to occur due to heat shock. The disconnection of the winding of the ignition transformer, particularly the disconnection of the secondary winding, is a factor that lowers the reliability and durability of the discharge ignition device. For this reason, it is strongly desired to suppress disconnection of the winding due to heat shock.

  The present invention has been made to address such a problem. SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge igniter for a combustion appliance having improved reliability and durability by suppressing disconnection of a winding of an ignition transformer due to heat shock or the like.

(Claim 1)
A discharge igniter for a combustion appliance according to the present invention has a primary winding, a secondary winding, an output pin and an earth pin connected to the secondary winding, an ignition transformer for increasing a power supply voltage, and the ignition transformer. A high-voltage generating device including an output terminal connected to the output pin and an external housing accommodating the ignition transformer; a tip functioning as a spark discharge end; and a terminal electrically connected to the output terminal. And a connection portion between the secondary winding and the output pin and the ground pin, wherein the secondary winding is wound around a root of the output pin and the ground pin. A first winding portion, and a second winding portion in which the secondary winding is wound around the distal end of the output pin and the ground pin, wherein the second winding portion is formed by the first winding portion. Also Serial secondary winding is characterized in that wound densely.

(Claim 2)
Another ignition igniter for a combustion appliance of the present invention has a primary winding, a secondary winding, an output pin and an earth pin to which the secondary winding is connected, and an ignition transformer for boosting a power supply voltage; A high-voltage generator including an output terminal connected to the output pin of the ignition transformer, and an external housing that houses the ignition transformer; and a tip that is to be installed near a burner of the combustion appliance. A spark plug provided with a discharge electrode having a terminating end electrically connected to the output terminal, wherein a connection between the secondary winding and the output pin and the ground pin has a structure in which the secondary winding is A first winding part wound around the root of the output pin and the ground pin; and a second winding part wound around the tip of the output pin and the ground pin, Winding Parts is characterized in that the secondary winding is wound densely than said first winding portion.

  In the discharge igniter for a combustion appliance of the present invention, the connection between the secondary winding and the output pin and the ground pin is connected to the first winding part where the secondary winding is wound around the pin root and the pin tip side. And a second winding portion that has been wound. The second winding portion has a secondary winding wound at a higher density than the first winding portion. In other words, the first winding portion has the secondary winding wound at a lower density than the second winding portion. The first winding portion around which the secondary winding is wound at a low density has an effect of dispersing and relaxing stress during heat shock. The second winding portion around which the secondary winding is wound at a high density has an effect of ensuring good electrical connection between the secondary winding and the output pin and the ground pin. With these combinations, it is possible to improve the electrical connection while significantly suppressing disconnection of the secondary winding due to heat shock.

(Claim 3)
In one aspect of the discharge igniter for a combustion appliance of the present invention, the first winding portion has the secondary winding wound around the output pin and the ground pin at 1.2 to 6 turns / mm, and The second winding part comprises an ignition transformer in which the secondary winding is wound at 1.35 to 5.55 turns / mm around the output pin and the ground pin. However, the secondary winding is wound at a higher density in the second winding part than in the first winding part. By applying such a winding amount, the effect of dispersing and relaxing stress can be obtained with good reproducibility in the first winding portion. Further, the second winding portion can ensure good electrical connection between the secondary winding and the output pin and the ground pin.

(Claim 4)
Another aspect of the discharge igniter for a combustion appliance of the present invention is that the connection portion between the secondary winding and the output pin and the earth pin is soldered from a tip of the output pin and the earth pin to the second winding portion. An ignition transformer is provided. As described above, it is preferable that the solder dip for the output pin and the ground pin be up to the second winding portion. In other words, it is preferable that the first winding part does not have a solder dip. According to such a configuration, the effect of dispersing and relaxing the stress by the first winding portion can be further enhanced.

  ADVANTAGE OF THE INVENTION According to the discharge ignition device for combustion appliances of this invention, the disconnection of the winding of the ignition transformer by heat shock can be suppressed reliably and with good reproducibility. This makes it possible to provide a discharge ignition device for a combustion appliance that is excellent in reliability and durability.

  Hereinafter, embodiments for carrying out the present invention will be described. FIG. 1 shows a configuration of a discharge ignition device for a combustion appliance according to a first embodiment of the present invention. The discharge igniter 1 for a combustion appliance shown in FIG. 1 includes a high-voltage generator 2 and an ignition plug 3. Such a discharge igniter 1 for a combustion appliance is used for various combustion appliances such as a gas combustion appliance such as a gas stove or a water heater and an oil combustion appliance such as an oil fan heater.

  The high voltage generator 2 has an outer casing 11 made of an insulating material such as a resin. The outer housing 11 has a mounting portion 12 for installing the high-voltage generator 2 and thus the discharge igniter 1 in the main body of the combustion appliance. In the outer housing 11, an ignition transformer 13 and a circuit unit 16 in which electronic components 14 such as diodes and resistors are mounted on a printed circuit board 15 are housed. The circuit unit 16 is electrically connected to a power terminal 17 provided on the lower surface side of the external housing 11. Although not shown, a resin sealant such as urethane resin is sealed in the outer housing 11 to seal the ignition transformer 13 and the circuit unit 16.

  As shown in FIGS. 2 and 3, the ignition transformer (step-up transformer) 13 has a coil bobbin 19 around which a secondary winding 18 is wound on the outer peripheral side. The coil bobbin 19 has a center hole, into which a magnetic core 21 such as an iron core around which a primary winding 20 is wound is inserted. The power supply voltage is boosted to a predetermined high voltage based on the number of turns of the primary winding 20 and the secondary winding 18. An output pin 22 and a ground pin 23 for the secondary winding 18 and connection pins 24 and 24 for the primary winding 20 are provided upright on the coil bobbin 19. For each of the pins 22, 23 and 24 as connection terminals, for example, a mild steel wire with solder plating is used.

  The primary winding 20 of the ignition transformer 13 as described above is wound around the magnetic core 21 so that the number of turns is generally about 20 to 60 turns. For this reason, a coated conductor such as a urethane-coated copper wire having a wire diameter of about 0.3 mm is used for the primary winding 20. Both ends of such a primary winding 20 are wound around connection pins 24, 24, respectively. The primary winding 20 and the connection pins 24 are electrically connected by dip soldering of these winding portions 25. The primary winding 20 is connected to the power supply terminal 17 via the connection pin 24 and the circuit unit 16.

  On the other hand, the secondary winding 18 needs to be wound around the coil bobbin 19 so that the number of turns is about 2000 to 6000 turns. For this reason, a coated conductor such as a urethane-coated copper wire having a wire diameter of about 0.05 mm is used for the secondary winding 18. Such a secondary winding 18 is electrically connected by winding both ends thereof around an output pin 22 and an earth pin 23, respectively, and further by dipping the winding part 26 by soldering. By the way, since the secondary winding 18 using a very thin coated copper wire or the like has low strength, there is a possibility that disconnection may occur when a heat shock is applied. In particular, in the winding portion 26 around the output pin 22 and the ground pin 23 of the secondary winding 18, tension is easily applied to the secondary winding 18. This causes disconnection in the conventional ignition transformer.

  Therefore, in the discharge igniter 1 for a combustion appliance of this embodiment, as shown in FIG. 4, the secondary winding 18 is wound around the root of the output pin 22 (and the earth pin 23) at a low density, and the distal end is wound. Highly wrapped around the side. That is, the connecting portion 26 between the secondary winding 18 and the output pin 22 (and the ground pin 23) is connected to the first winding portion 27 in which the secondary winding 18 is wound on the pin root side and the secondary winding 18 And a second winding portion 28 wound around the tip end of the pin. The second winding portion 28 has the secondary winding 18 wound at a higher density than the first winding portion 27.

  A second winding portion (high-density winding portion) 28 around which the secondary winding 18 is wound at a high density has a function of improving the reliability of electrical connection between the secondary winding 18 and the output pin 22 and the ground pin 23. Have. On the other hand, in the first winding portion 27, the secondary winding 18 is wound at a low density. The first winding portion (low-density winding portion) 27 contributes to suppressing disconnection of the secondary winding 18. The winding process of the secondary winding 18 is performed, for example, by winding the secondary winding 18 at a low density on the pin root side, then winding it on the pin tip side at a high density, and then winding again low density on the pin root side.

  Further, as shown in FIG. 5, the solder dip for the connection portion 26 between the secondary winding 18 and the output pin 22 (and the ground pin 23) is moved from the tip of the output pin 22 (and the ground pin 23) to the second winding portion. 28 is covered with solder 29. That is, the first winding portion 27 is not coated with the solder, and the secondary winding 18 is relatively movable. Although the solder dip may slightly reach the first winding portion 27, it is preferable to adjust the solder dip so that at least a part of the first winding portion 27 remains as a portion not coated with solder. The secondary winding 18 is electrically connected to the output pin 22 and the ground pin 23 by such a solder dip. In addition, the earth pin 23 is grounded to the combustion appliance body.

  In the connection portion 26 between the secondary winding 18 and the output pin 22 and the earth pin 23, the stress caused by heat shock is dispersed and relaxed by the first winding portion 27 in which the secondary winding 18 is wound at a low density. . For this reason, it is possible to suppress disconnection of the secondary winding 18 due to heat shock. That is, even when a heat shock is applied to the connection portion 26, it is possible to prevent the stress from being concentrated at one location in the first winding portion 27 and to disperse the stress. Such a dispersion / relaxation effect of stress can be further enhanced by not performing solder dip on the first winding portion 27. Thus, it is possible to greatly suppress disconnection of the secondary winding 18 of the ignition transformer 13 due to heat shock.

  The first winding section 27 preferably winds the secondary winding 18 around the output pin 22 and the ground pin 23 at 1.2 to 6 turns / mm. More preferably, it is 1.4 to 4 turns / mm, particularly preferably 1.5 to 3 turns / mm. If the winding amount of the secondary winding 18 exceeds 6 turns / mm, the tension of the secondary winding 18 increases, and there is a possibility that the effect of dispersing the stress cannot be sufficiently obtained. Even if the winding amount of the secondary winding 18 is less than 1.2 turns / mm, the effect of dispersing the stress is reduced. That is, by configuring the first winding portion 27 with the above-described winding amount, it is possible to suppress the disconnection of the secondary winding 18 due to heat shock with good reproducibility. On the other hand, the second winding portion 28 preferably winds the secondary winding 18 around the output pin 22 and the ground pin 23 at 1.35 to 5.55 turns / mm. More preferably, it is 2 to 4.5 turns / mm, particularly preferably 2.5 to 4.5 turns / mm. With such a winding amount, the reliability of electrical connection between the secondary winding 18 and the output pin 22 and the ground pin 23 can be improved.

  As a specific example of the ignition transformer 13 described above, a primary winding 20 made of a urethane-coated copper wire having a wire diameter of 0.3 mm is wound in 55 turns, and a primary winding 20 made of a urethane-coated copper wire having a wire diameter of 0.05 mm is used. An ignition transformer in which the next winding 18 was wound with 800 turns × 8 was produced. Both ends of the secondary winding 18 were wound around the roots of the output pin 22 and the earth pin 23 at a low density, and then wound around the tip end at a high density. The winding amount of the first winding portion 27 was 2 turns / mm (5 turns / 2.5 mm). The winding amount of the second winding portion 28 was 3.33 turns / mm (5 turns / 1.5 mm). The solder dip was from the tip of the pin to the second winding portion 28. On the other hand, as a comparative example with the present invention, an ignition transformer was manufactured in which only the secondary winding was wound around the roots of the output pin and the ground pin with high density.

  A heat shock resistance test was performed on the ignition transformers according to the above-described Examples and Comparative Examples in the following manner. Thereafter, the presence or absence of disconnection of the secondary winding was measured and evaluated. The heat shock resistance test was performed by applying a heat cycle of −25 ° C. × 1 hr + 85 ° C. × 1 hr to each of the ignition transformers according to Examples and Comparative Examples. In addition, the heat shock resistance test was performed for each of the ignition transformers by preparing 100 ignition transformers according to the example and the comparative example. As a result, at the end of 1000 cycles, the number of ignition transformers to be disconnected was 0 out of 100 in the example, while the number of ignition transformers to be disconnected was 14 in 100 in the comparative example. From these measurement and evaluation results, it can be seen that the discharge ignition device using the ignition transformer having the above-described connection structure has excellent reliability and durability.

  In this embodiment, only the connection portion 26 of the secondary winding 18 to the output pin 22 and the ground pin 23 is connected to the first winding portion (low-density winding portion) 27 and the second winding portion (high-density winding portion). ) 28 has been described. The present invention is not limited to such a configuration. The same configuration can be applied to the connection portion 25 of the primary winding 20 to the connection pin 24. However, since the primary winding 20 has a larger wire diameter than the secondary winding 18, the risk of disconnection due to heat shock is smaller than that of the secondary winding 18. For this reason, the reliability and durability of the discharge ignition device 1 can be maintained even when the configuration in which the primary winding 20 is wound only on the pin root portion side is adopted.

  On the upper surface side of the outer housing 11 in which the above-described ignition transformer 13 is stored, a cylindrical convex portion 30 serving as a mounting portion of the ignition plug 3 is provided. The cylindrical protrusion 30 communicates with the inside of the outer housing 11. An output terminal 31 is arranged in the cylindrical projection 30. The output terminal 31 is electrically connected to the output pin 22 of the ignition transformer 13. The tip of the output terminal 31 is disposed in the cylindrical projection 30, and is thereby exposed to the external space of the external housing 11. A female connector 32 is attached to the tip of the output terminal 31. In this embodiment, a plug contact is used for the connector 32.

  On the other hand, the ignition plug 3 has a discharge electrode 41 made of a heat-resistant metal rod. The tip 42 of the discharge electrode 41 is scheduled to be installed near the burner of the burning appliance, and functions as a spark discharge end. The outer peripheral portion of the discharge electrode 41 is covered with an insulator 44 so as to expose a tip portion 42 and a terminal portion 43 thereof. The discharge electrode 41 is protected by an insulator 44. A heat-resistant and insulating ceramic material such as alumina is used for the insulator 44. At the end of the insulator 44 on the side of the terminating end 43, a concave portion 45 constituting a mounting portion to the high voltage generator 2 is provided. The terminal end 43 of the discharge electrode 41 is exposed in the recess 45.

  An end portion (connection end) 43 of the discharge electrode 41 is used as a connection plug for directly connecting to the output terminal 31 of the high-voltage generator 2, and the tip thereof is, for example, tapered. The terminal 43 of the discharge electrode 41 is inserted and connected to the connector 32 mounted on the output terminal 31. At the same time, the concave portion 45 provided at the end of the insulator 44 is mounted on the cylindrical convex portion 30 of the high voltage generator 20. With such a structure, the high voltage generator 2 and the spark plug 3 are mechanically coupled and electrically connected. According to such a direct connection structure of the plug-in contact type, it is possible to prevent generation of a capacitance component due to an intermediate high-voltage cable or the like. Furthermore, after the discharge electrode 41 and the output terminal 31 can be detachably connected, their electrical connection reliability can be improved.

  In this embodiment, the connection structure for directly connecting the discharge electrode 41 and the output terminal 31 using the connector 32 such as a plug contact has been described. The present invention is not limited to such a direct connection structure. For example, it is also possible to directly connect the discharge electrode 41 and the output terminal 31 using a compression-type or crimp-type connection terminal. Furthermore, the connection between the discharge electrode 41 and the output terminal 31 is not limited to the direct connection type, and the discharge electrode 41 and the output terminal 31 may be electrically connected via a high-voltage cable or the like.

  Further, in this embodiment, the spark plug 3 in which the outer periphery of the discharge electrode 41 is covered with the insulator 44 is used, but the insulator 44 can be omitted. That is, the ignition plug 3 may be constituted only by the discharge electrode 41. In such a case, the attachment of the spark plug 3 to the combustion appliance main body is performed using, for example, a support portion of the discharge electrode 41 provided on the combustion appliance main body side. A support structure that mechanically supports the discharge electrode 41 while ensuring insulation between the discharge electrode 41 and the combustion appliance body is used for the support portion provided on the combustion appliance body side.

  In such a discharge igniter 1 for a combustion appliance, a high voltage is generated at the output terminal 31 by boosting the voltage input from the power supply terminal 17 to a predetermined voltage by the ignition transformer 13 of the high voltage generator 2. . This high voltage is applied from the output terminal 31 to the discharge electrode 41 of the ignition plug 3, and a spark is generated from the tip (spark discharge end) 42 of the discharge electrode 41. The discharge igniter 1 ignites a gas burner, a petroleum burner, or the like by a spark generated at a tip portion 42 of the discharge electrode 41.

  As described above, in the discharge igniter 1 for a combustion appliance of this embodiment, the connection 26 between the secondary winding 18 and the output pin 22 and the earth pin 23 in the ignition transformer 13 is connected to the first winding portion (low-density). And a second winding portion (high-density winding portion) 28. According to such a connection portion 26, the electrical connection is sufficiently ensured by the second winding portion 28, and the stress due to heat shock is dispersed / relaxed by the first winding portion 27 where the solder is not dipped. It becomes possible. Thereby, disconnection of the secondary winding 18 due to heat shock can be suppressed. Therefore, it is possible to improve the reliability and durability of the discharge igniter 1 for a combustion appliance.

  In particular, even when the high voltage generator 2 of the discharge igniter 1 is installed in an atmosphere having a large temperature difference, the reliability and durability of the discharge igniter 1 can be improved. It can be said that the discharge igniter 1 for a combustion appliance of this embodiment is suitable for use in an atmosphere having a large temperature difference. An example of such an atmosphere having a large temperature difference (location where the high-voltage generator 2 is installed) is, for example, a position near a burner of the main body of the combustion appliance.

  Next, a second embodiment of the discharge ignition device for a combustion appliance of the present invention will be described with reference to FIGS. 1 to 5 are denoted by the same reference numerals, and a description thereof will be partially omitted.

  The ignition transformer 51 shown in FIGS. 6 and 7 is used for a discharge ignition device having a plurality of spark plugs, and has a plurality of secondary windings and output pins. That is, the ground pin 23 is provided upright at the center of the coil bobbin 19, and the first secondary winding 52 and the second secondary winding 53 are wound on both sides thereof. A first output pin 54 and a second output pin 55 are erected on both sides of the coil bobbin 19 corresponding to the first and second secondary windings 52 and 53.

  The connecting portion 26 of the first and second secondary windings 52 and 53 to these first and second output pins 54 and 55 is connected to the secondary output pin 52 and 53 in the same manner as in the first embodiment shown in FIG. It has a first winding portion 27 in which the windings 52 and 53 are wound around the pin root portion at a low density and a second winding portion 28 in which the windings 52 and 53 are wound around the pin tip portion at a high density. The ends of the first and second secondary windings 52 and 53 are wound around the earth pin 23, respectively, and the configuration of the connecting portion 26 is the same. The solder dip for the output pins 54 and 55 and the ground pin 23 also extends from the tip of the pin to the second winding portion 28 as in the first embodiment. The configuration of the ignition transformer 51 other than these is the same as that of the above-described first embodiment.

  The ignition transformer 51 having such a plurality of secondary windings 52 and 53 and a plurality of output pins 54 and 55 is housed in an external housing, although not shown, as in the first embodiment described above. . Output terminals are connected to the output pins 54 and 55, respectively. By connecting an ignition plug to each of the plurality of output terminals, the discharge ignition device for a combustion appliance of this embodiment is configured. The configuration of the discharge ignition device other than these is the same as that of the first embodiment.

  The present invention is also effective for a discharge ignition device in which a plurality of ignition plugs are connected to a high voltage generator as described above. That is, by suppressing the disconnection of the secondary windings 52 and 53 due to the heat shock, it is possible to improve the reliability and durability of the discharge igniter for a combustion appliance having a plurality of spark plugs. . It should be noted that the number of ignition plugs connected to the high-voltage generator is not limited to two, and it goes without saying that the same effect can be obtained with three or more.

It is a sectional view showing composition of a discharge igniter for combustion appliances by a 1st embodiment of the present invention. It is a front view of the ignition transformer in the discharge ignition device for combustion appliances shown in FIG. It is a side view of the ignition transformer in the discharge igniter for combustion appliances shown in FIG. FIG. 4 is an enlarged view showing a structure of a winding part of a secondary winding around an output pin and an earth pin of the ignition transformer shown in FIGS. 2 and 3. FIG. 5 is a diagram illustrating a state in which solder is dipped in a portion where a secondary winding is wound around an output pin and an earth pin illustrated in FIG. 4. It is a front view showing the composition of the ignition transformer in a 2nd embodiment of the present invention. FIG. 7 is a side view of the ignition transformer shown in FIG. 6.

Explanation of reference numerals

  DESCRIPTION OF SYMBOLS 1 ... Discharge ignition device for combustion appliances, 2 ... High voltage generator, 3 ... Spark plug, 11 ... External housing, 13,51 ... Ignition transformer, 18,52,53 ... Secondary winding, 19 ... Coil bobbin, 20 ... Primary winding, 21 ... Magnetic core, 22, 54, 55 ... Output pin, 23 ... Ground pin, 26 ... Connecting part, 27 ... First winding part, 28 ... Second winding part, 29 ... Soldering, 31 ... output terminals, 41 ... discharge electrodes, 42 ... tip parts (spark discharge ends), 43 ... end parts (connection ends), 44 ... insulators.

Claims (7)

An ignition transformer having a primary winding, a secondary winding, an output pin to which the secondary winding is connected, and an earth pin, and boosting a power supply voltage; and an output terminal connected to the output pin of the ignition transformer. A high-voltage generator including an external housing that houses the ignition transformer;
An ignition plug including a discharge electrode having a tip portion functioning as a spark discharge end and a termination portion electrically connected to the output terminal,
A connection portion between the secondary winding and the output pin and the ground pin, a first winding portion in which the secondary winding is wound on the base side of the output pin and the ground pin, and the secondary winding is A second winding portion wound around the output pin and the tip end side of the ground pin,
The discharge igniter for a combustion appliance, wherein the secondary winding is wound at a higher density in the second winding part than in the first winding part. An ignition transformer having a primary winding, a secondary winding, an output pin to which the secondary winding is connected, and an earth pin, and boosting a power supply voltage; and an output terminal connected to the output pin of the ignition transformer. A high-voltage generator including an external housing that houses the ignition transformer;
An ignition plug including a discharge electrode having a tip portion that is to be installed near a burner of the combustion appliance and a termination portion that is electrically connected to the output terminal;
A connection portion between the secondary winding and the output pin and the ground pin, a first winding portion in which the secondary winding is wound on the base side of the output pin and the ground pin, and the secondary winding is A second winding portion wound around the output pin and the tip end side of the ground pin,
The discharge igniter for a combustion appliance, wherein the secondary winding is wound at a higher density in the second winding part than in the first winding part.   The first winding part is such that the secondary winding is wound around the output pin and the ground pin at 1.2 to 6 turns / mm, and the second winding part is that the secondary winding is formed by the output pin and the ground pin. The discharge igniter for a combustion appliance according to claim 1 or 2, which is wound at a rate of 1.35 to 5.55 turns / mm around the ground pin.   The connection part between the secondary winding and the output pin and the ground pin is coated with solder from the tip of the output pin and the ground pin to the second winding part. The discharge ignition device for a combustion appliance according to any one of the preceding claims.   The ignition transformer has a bobbin in which a magnetic core around which the primary winding is wound is inserted into a center hole while the secondary winding is wound on an outer peripheral side, and the output pin and the earth pin are The discharge ignition device for a combustion appliance according to any one of claims 1 to 4, wherein the discharge ignition device is provided on a bobbin.   The discharge ignition device for a combustion appliance according to any one of claims 1 to 5, wherein the ignition plug has an insulator for protecting the discharge electrode.   The discharge ignition device for a combustion appliance according to any one of claims 1 to 6, wherein a resin sealant is sealed in the outer housing.

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