JP2001280639A - Power supply device for igniting burner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply device for igniting a burner which can be stably used both inside and outside by preventing the influence of immersion or leakage. SOLUTION: In the power supply device for igniting a burner, a step part for defining the protruding open part of a power input terminal is provided in a main body case. A part for surrounding each protruding open part is raised from the plane of the step part. At least one drain passage is formed along the outer surface of the main body case from the outer edge part of the step part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply unit for igniting a burner used for a burning appliance such as an outdoor barbecue stove.

[0002]

2. Description of the Related Art Conventionally, as a power supply device for this type of burner ignition, a boosting transformer and an ignition control circuit device connected to a primary side of a boosting transformer and a power supply circuit are separated in a main body case. There is also known a type in which a secondary terminal of a step-up transformer is connected to an output terminal provided to be exposed outside the main body case through a high-voltage output circuit board (U.S. Pat. No. 5,747,442, Utility Model). Japanese Patent No. 2552112, Japanese Patent Laid-Open No. 10-3321
No. 48). The power supply circuit is usually powered by a battery attached to an appropriate part
It is connected to an input power supply terminal provided in the ignition control circuit device. By the way, as for burning appliances, not only fixed gas appliances and petroleum appliances installed indoors, but also outdoor appliances are increasing due to the spread of portable appliances used for outdoor barbecue etc. in recent years due to its simplicity. Is coming. Accordingly, this type of burner ignition power supply device has been used both indoors and outdoors. In addition, various types of combustion appliances are used, for example, from a single stove to a multiple stove (for example, three, four, five, or six).
Stoves and the like are provided for practical use. Therefore, conventionally,
The burner ignition power supply is designed according to the number of appliances to be applied.

[0003]

The burner ignition power supply device is designed on the premise that the burning appliance is used indoors or under an environment equivalent thereto, and therefore, measures against flooding and water leakage are taken. There is no fact. for that reason,
Especially when used in the field and used for combustion equipment, water flowing from the gap around the input terminal of the power supply circuit due to rainfall or dew wets the ignition control circuit device installed in the main body case of the device and controls the ignition The circuit may not work or may be damaged.

The present invention reduces the effects of flooding and water leakage without substantially changing the basic structure of a conventional burner ignition power supply, that is, without substantially increasing the manufacturing cost. It is an object of the present invention to provide a burner ignition power supply device which can be prevented and used stably both indoors and outdoors.

[0005]

According to the present invention, in order to attain the above object, according to the present invention, a step-up transformer and an ignition control circuit device connected to a primary side of the step-up transformer are separated in a main body case. In the power supply unit for burner ignition provided with the output terminal connected to the secondary side terminal of the step-up transformer and the power input terminal connected to the ignition control circuit board exposed outside the main body case, power is input to the main body case. A step defining a protruding opening of the terminal is provided, a portion surrounding each protruding opening is formed so as to protrude from a plane of the step, and at least one portion is formed along an outer surface of the main body case from an outer edge of the step. A drain passage is formed, and the water on the step surface is guided along the outer surface of the main body case. Preferably, the step may be configured to be inclined toward the drain passage.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a main body case 1 constituting a main part of a burner ignition power supply device according to an embodiment of the present invention. This main body case 1 is made of a suitable resin material such as ABS resin, and has a bottom side open. And
The partition wall 2 is partitioned into a space 3 for housing the step-up transformer and a space 4 for housing the ignition control circuit device. A step portion 5 is formed on the inner wall of the step-up transformer housing space 3 on the side opposite to the partition wall 2, and the step portion 5 is divided into six by five partitions 6, and each part of the step portion thus partitioned has The vertically extending holes 7 are formed in rows parallel to the inner wall of the main body case 1. A pin-shaped high-voltage output terminal 8 is fixedly mounted in each hole 7, the base of each high-voltage output terminal 8 protrudes from the plane of the step 5, and the tip of each high-voltage output terminal 8 is exposed outside the main body case 1. It has been like that.

The main body case 1 is provided with a step 9 along the case wall opposite to the partition wall 2 in the ignition control circuit device accommodating space 4, and the step 9 is provided on an ignition control circuit device to be described later. Two slit-shaped long holes 10 for passing the planted power input terminals are formed. A flange 11 is formed on the outer surface 9a of the step 9 so as to surround each slit-shaped long hole 10,
The flange 11 supports the power input terminal and makes it difficult for water to enter the ignition control circuit device housing space 4. Note that, if necessary, the outer surface 9a of the step 9 may be configured to be slightly inclined toward the outer edge, so that water can accumulate on the outer surface 9a of the step 9. Can be effectively prevented. The inner surface 9b of the step 9 forms a receiving surface for receiving the ignition control circuit device. In addition, the main body case 1 includes a wall member 13 that defines two drain passages 12 from the edge of the outer surface 9a of the step portion 9 along the outer surface of the main body case 1, and the wall member 13 includes:
Power input terminal 1 fitted into two slit-shaped long holes 10
4 is formed.

Next, with reference to FIG. 4, an example of the circuit configuration of the ignition control circuit device of the burner ignition power supply device of the present invention will be described. In the illustrated circuit, reference numeral 20 denotes a 3 volt battery constituting a power supply circuit power supply, 21 denotes an electrolytic capacitor, 22 denotes a resistor, 23 denotes a rectifier diode, 24 denotes a transistor, 25 denotes an oscillation transformer, 26 denotes a diode,
7 is a Sidac, 28 is a capacitor, and 29 is a step-up transformer. The positive electrode of the battery 20 is connected to an intermediate point on the primary side of the oscillation transformer 25 and to the secondary side of the oscillation transformer 25 via the electrolytic capacitor 21. The negative electrode of the battery 20 is connected to one end of the primary side of the oscillation transformer 25 via the rectifier diode 23 and the resistor 22, and the other end of the primary side of the oscillation transformer 25 is connected to the collector of the battery 20 via the collector-emitter circuit of the transistor 24. Connected to negative electrode. The base of the transistor 24 is a rectifier diode 23
And the resistor 22. Thus, an oscillation circuit is formed. The oscillating circuit generates an AC output on the secondary side of the oscillating transformer 25 by turning on a switch (not shown) (ignition switch of the combustion appliance). The AC output thus generated is applied to the primary side of the step-up transformer 29 via the switching circuit including the diode 26, the Sidac 27, and the capacitor 28, whereby the current on the primary side of the step-up transformer 29 is reduced. Intermittent at a cycle determined by the switching circuit. As a result, predetermined output voltages are generated between A and B, C and D, and E and F between the terminals of the three windings on the secondary side of the step-up transformer 29.

The circuit elements of the oscillating circuit and the switching circuit thus configured are on a printed circuit board (not shown).
The power input terminal 14 is mounted on the printed circuit board and is mounted on the printed circuit board. The ignition control circuit device thus obtained is pushed and inserted into the ignition control circuit board accommodating space 4 in the main body case 1 until a part of the printed board contacts the inner surface 9b of the step portion 9 in the main body case 1. As a result, the power input terminal 14 projects outside the main body case 1 through the two slit-shaped long holes 10 and can be connected to an external power source.

As shown in FIG. 5, a step-up transformer 29 has a primary winding 31 wound around a winding core inserted into a hollow cylindrical bobbin 32, and three divided portions of the hollow cylindrical bobbin 32 are provided. The secondary windings 33, 34, 35 are respectively wound, one end of the secondary winding 33 is connected to the terminal A, and the other end is connected to the terminal B,
One end of the secondary winding 34 is connected to the terminal C, the other end is connected to the terminal D, one end of the secondary winding 35 is connected to the terminal E, and the other end is connected to the terminal F. The step-up transformer 29 thus configured is inserted into the step-up transformer housing space 3 of the main body case 1 with the terminals A to F facing downward. Then, a high-voltage circuit board 40 is fitted and mounted on each of the terminals A to F of the step-up transformer 29 and each partition 6 of the step portion 5 in the step-up transformer housing space 3.

FIG. 6 shows an example of the high-voltage circuit board 40. In the illustrated example, four fitting holes 41a, 41b, 41c and 41d are provided along the longitudinal direction substantially at the center of the rectangular board. The holes 41a to 41d are positioned corresponding to the terminals A to D of the step-up transformer 29 shown in FIG. On one of the long sides of the rectangular substrate, two fitting holes or recesses 42a and 42b opened at the side edges are provided at positions corresponding to the terminals E and F of the step-up transformer 29 shown in FIG. I have. Further, the other long side of the rectangular substrate has six fitting holes or recesses 43 opened to the side edges.
a, 43b, 43c, 43d, 43e, 43f are provided at positions corresponding to the respective high-voltage output terminals 8 mounted on the step portion 5 in the step-up transformer housing space 3. As shown, the surface of the high voltage circuit board 40 (the surface opposite to the step-up transformer when assembled) is between the recess 43a and the fitting hole 41a, between the recess 43b and the fitting recess 42a, and Between the fitting hole 41b, the concave portion 43d and the fitting hole 41c
Between the recess 43e and the fitting recess 42b;
f and the fitting holes 41d, respectively.
4b, 44c, 44d, 44e, and 44f are formed. Further, the recesses 42 are formed from the side edges of the substrate provided with the recesses 43a to 43f between the adjacent high-voltage conductive paths.
A slit 45 for preventing short-circuit is provided near the side where a and 42b are provided. Each short-circuit preventing slit 45 is formed with an uneven edge in order to make the creepage distance as long as possible.

The burner ignition power supply device thus constructed is attached to the combustion appliance and used to perform an ignition operation in conjunction with an ignition knob or an ignition button of the combustion appliance.

In the illustrated embodiment, two drain passages 12 are provided corresponding to the power supply input terminals 14, but one drain passage may of course be provided.

[0014]

As described above, in the burner ignition power supply device according to the present invention, the main body case is provided with the steps defining the projecting openings of the power input terminals, and the portion surrounding each projecting opening is stepped. It is formed so as to protrude from the plane of the part, and at least one drainage passage is formed from the outer edge of the step along the outer surface of the main body case, so that it is housed in the main body case to prevent water leakage and water leakage. It is possible to prevent the ignition control circuit device from getting wet, so that it can be used stably for a long period without being affected by the use environment.

Further, the burner ignition power supply device according to the present invention can be constructed without substantially changing the basic structure of the conventional burner ignition power supply device.
In addition to being able to fit well into the limited installation space provided for this type of burner ignition power supply in a combustion appliance, it can be manufactured without a substantial increase in cost.

[Brief description of the drawings]

FIG. 1 is a schematic bottom view showing a main part of one embodiment of a burner ignition power supply device according to the present invention.

FIG. 2 is a schematic plan view of the apparatus in FIG. 1;

FIG. 3 is a schematic sectional view taken along line AA of FIG. 1;

FIG. 4 is a circuit diagram showing an example of a circuit configuration of an ignition control circuit device in the burner ignition power supply device shown in FIG. 1;

FIGS. 5A and 5B are a schematic front view and a side view showing a step-up transformer in the burner ignition power supply device shown in FIG. 1;

6 is a schematic plan view showing an example of a high-voltage circuit board on the secondary side of the step-up transformer shown in FIG.

[Explanation of symbols]

 1: body case 9: step 9a: outer surface of step 9 10: slit-shaped long hole 11: flange surrounding slit-shaped long hole 10 12: drain passage 13: wall member defining drain passage 12 14: Power input terminal

Claims (2)

[Claims] A step-up transformer and an ignition control circuit device connected to a primary side of the step-up transformer are housed separately in a main body case, and an output terminal connected to a secondary-side terminal of the step-up transformer and an ignition terminal. In the power supply device for burner ignition provided with the power input terminal connected to the control circuit device exposed outside the main body case, a step portion is provided in the main body case to define a protruding opening of the power input terminal, and each protruding opening is surrounded. The portion is formed so as to protrude from the plane of the step, and at least one drainage passage is formed from the outer edge of the step along the outer surface of the main body case,
A burner ignition power supply device characterized in that water on the step surface is guided along the outer surface of the main body case. 2. The burner ignition power supply according to claim 1, wherein the step is inclined toward the drain passage.