JPH086925B2 - Gas combustion 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 gas combustion apparatus in which a fuel tank such as a gas lighter, a burner, an ignition device for igniting fuel, etc. are housed in a casing with a lid. It is not intended to be limited to
Gas in a wind-proof cylinder as disclosed in
The present invention relates to improvement of a wind resistant combustion device in which an air-fuel mixture burns.

[0002]

2. Description of the Related Art A gas writer disclosed in Japanese Utility Model Publication No. 3-45017 supplies a mixture of air and a fuel gas to an internal space of a hollow burner cylinder (3), and the mixture is supplied in the cylinder. To burn. Since the gas burns in the cylinder and the cylinder (3) prevents the external wind from blowing off the combustion gas, it is difficult for the wind to misfire. That is, there is a windproof effect.

A gas mixing tube having a fuel gas receiving port at the lower end, a gas ejection opening at the upper end protruding into the combustion cylinder (3), and an intake port on the outer surface between the gas receiving port and the gas ejection opening. (Five)
As a result, a mixture of fuel gas and air is supplied into the combustion cylinder (3), but the gas flow sucks air at a high speed through the intake port, which causes the gas mixing pipe (5) to mix at a relatively high speed. Supply air to the combustion tube (3). Therefore, the combustion gas is discharged from the combustion cylinder (3) at a high speed. However, since the fuel gas and the air are sufficiently mixed, so-called red flames do not appear inside or outside the combustion tube (3), and the combustion gas is transparent or bluish and is difficult to visually recognize. When the catalyst wire (7) is provided, it glows red, so it can be easily confirmed that the ignition is carried out by looking inside the combustion tube (3) from above, but from the side, it is ignited ( It is not easy to tell if there is a flame) or not. Since the combustion gas blows out at a high speed, this invisible flame brings anxiety to the user.
This anxiety becomes particularly strong when the catalyst wire (7) is not provided.

Cigarette lighters are often used not only outdoors in the wind, but also in indoor calm environments. When there is no wind outdoors or when it is used indoors, a red flame like a candle, which is generally used in the past, has a feeling of chilling, so it is often desired, and one writer
It is preferable to select a flame having a high wind resistance effect (combustion gas of air-fuel mixture) and a red flame having a low wind resistance effect but a good visual feeling.

The inventor of the present invention has proposed a gas combustor capable of making such selections in Japanese Patent Application Nos. 4-190417, 4-904418, 4-325834 and 5-205. Issued in No.

These gas combustion devices have a cylindrical member (3, 30) having an upper end opening (3a); an opening (8a) for discharging fuel gas into the inner space of the cylindrical member (3, 30), The tubular member includes a fuel gas receiving opening (8c) below the opening (8a) and an air inlet (8b) opened on a side surface between these openings (8a, 8c).
A pipe member (8) projecting from below into the inside of (3, 30); a fuel tank (FT) having a gas supply valve (27) for supplying fuel gas to the fuel gas receiving opening (8c); A gas release lever (14) for driving the supply valve (27) to open; an ignition means (26, 16) for igniting the fuel gas in the inner space of the tubular member (3, 30);
And a gas combustor including a casing (C1, C2, C3) including an upper opening and a lid member (C3) for opening and closing the upper opening, that is, a gas / air mixture in a so-called wind-proof cylinder. In the wind-resistant combustion device that burns, the tubular member
(3, 30), the air intake (30
a), an opening / closing member (7g) for opening and closing the air inlet (30a) of the tubular member (3, 30), and this opening and closing member (7g) is in a position to close the air inlet (30a). In a hollow body (7) having a cylinder trunk (7h) that opens the air intake port (8b) at one time and closes the air intake port (8b) at a position where the air intake port (30a) is open, It is characterized in that the member (8) is connected.

According to this, the opening / closing member (7g) of the hollow body (7)
Is supplied to the opening (8c) at the lower end of the pipe member (8) when the air inlet (30a) is closed and the tube trunk (7h) of the hollow body (7) opens the air intake (8b). Fuel gas flows from the pipe member (8) to the tubular member.
The fuel gas flows into the inner space of (3, 30), but due to this fuel gas flow, air is sucked along the flow of the fuel gas flow from the air suction port (8b) and rises inside the pipe member (8). The flow mixes air to form a fuel gas / air mixture, and exits into the inner space of the cylindrical member (3, 30). The air-fuel mixture burns in the tubular member (3, 30) to form combustion gas, which exits upward from the upper end opening (3a) of the tubular member (3, 30). Since the air-fuel mixture burns in the tubular members (3, 30) and the tubular members (3, 30) prevent the external wind from blowing off the combustion gas, misfire is less likely to occur in the wind. That is, there is a windproof effect.

The opening / closing member (7 g) of the hollow body (7) is connected to the air intake (30
When the a) is in the open position, and the tube trunk (7h) of the hollow body (7) closes the air inlet (8b), it is supplied to the opening (8c) at the lower end of the pipe member (8). The fuel gas exits from the pipe member (8) into the inner space of the tubular member (3, 30), but since the air inlet (8b) is closed, the tubular member (3, 30) passes through the pipe member (8). There is virtually no air in the fuel gas until it exits. On the other hand, the tubular member (3,3
Since the air inlet (30a) of (0) is open, the air enters the tubular member (3, 30) through it, and the tubular member (8) causes the tubular member (3, 3).
Although it is mixed with the fuel gas discharged in 0), the fuel gas concentration is higher and the air concentration is lower at a position closer to the pipe member (8). Pipe member
The farther from (8), the lower the fuel gas concentration and the higher the air concentration. The flame rises from the tubular member (3, 30), but the air concentration is lower as it is closer to the pipe member (8), so the flame presents a red external flame like a candle or a match flame. . In this way, the flame, so-called ordinary red flame, can be seen, so that the user can easily recognize the ignition. When there is no wind outdoors or indoors, this red flame gives the user a feeling of tranquility.

[0009]

[Problems to be solved by the invention] This type of hollow body (7)
Depending on the position, the combustion flame that is transparent or bluish (hereinafter referred to as "in-cylinder flame") and the combustion flame that exhibits a red outer flame (hereinafter referred to as "cylinder outer flame") is selected. ) Is the same, and if the tubular member (3, 30) is made smaller in order to reduce the device shape, it is easy to cause an ignition error when an external flame is generated, and the tubular member (3, 30) causes internal flame. It turns out that there is a problem of overheating.

The first object of the present invention is to reduce the probability of ignition mistake, and the second object is to prevent overheating of the tubular member.
The purpose of.

[0011]

DISCLOSURE OF THE INVENTION The present invention provides a gas supply valve (27) for a gas combustion apparatus having a hollow body (7) for determining whether a generated flame is an in-cylinder flame or an in-cylinder flame as described above. From the air suction port (8b) for supplying a large amount of air to the fuel gas supplied to the cylinder member (3, 30) to generate the in-cylinder flame, the fuel gas flow path, the opening / closing member (7g Is located at a position where the air inlet (30a) is closed, a vent passage (8c) is provided for supplying a small amount of air that is insufficient to completely burn the fuel gas.

[0012]

[Operation] When forming an in-cylinder flame, a large amount of air sucked from the air suction port (8b) is mixed with the fuel gas supplied to the cylinder member (3, 30), and the cylinder member (3, 30) is Since the fuel gas is sufficiently mixed with air when it exits, the ignition of the fuel gas by the ignition means (26, 16) is sure.

When the in-cylinder flame is formed, the hollow body (7) substantially closes the air intake port (8b), but the amount is insufficient to completely burn the fuel gas through the air passage (8c). However, air is supplied to the fuel gas flow path from the gas supply valve (27) to the air intake port (8b). This allows the tubular member (3,30)
A small amount of air is already mixed with the fuel gas discharged to the fuel cell, which assists the ignition of the fuel gas by the ignition means (26, 16) and reduces ignition mistakes when generating an external flame. Has a great effect of reducing ignition mistakes when the shape of the cylindrical member (3, 30) is reduced without substantially changing it so as to obtain an external flame of a predetermined length. Air is mixed with the fuel gas when it comes out to the tubular member (3, 30), but because it is a small amount, the generated flame presents a red external flame substantially like a candle or a match flame. . As the air passage (8c) is enlarged, the amount of air mixed in the fuel gas increases, and the flame is mostly red, like candles and match flames, and gradually becomes transparent or blue from below. The part becomes longer and the red part becomes shorter. When the air passage (8c) is enlarged so that a large amount of air sufficient for complete combustion is mixed in the fuel gas, when the fuel gas burns in the tubular member (3, 30) and the air intake port (8b) is opened. The same as the in-cylinder flame (clear or slightly bluish flame) that becomes difficult to see, so as mentioned above, the ventilation passage (8c) is a small amount that is insufficient to completely burn the fuel gas. Shall be supplied with air.

If the tubular member (3, 30) is made small, the heating of the tubular member (3, 30) by the in-cylinder flame becomes strong and the temperature rise becomes large. Therefore, in the preferred embodiment of the present invention, the tubular member (3, 30)
Between the outer peripheral surface of the casing and the casings (C1, C2, C3), a relatively wide gap (through which air flows along the outer peripheral surface from the lower side to the upper side of the tubular member (3, 30) ( C2s, 6b, 6a). According to this, when the in-cylinder flame is formed, the air in the gap (C2s, 6b, 6a) is heated by the heat of the tubular member (3, 30) and rises to flow upward, which is accompanied by the gap ( C2s, 6b, 6a) cold air enters the gap (C2s, 6b, 6a) to create an air flow that escapes from below to above, which cools the tubular member (3, 30).
Overheating at (3,30) is avoided.

When the tubular member (3, 30) is made small, a coil (7d) mounted on the fuel gas discharge nozzle (7d) for ensuring ignition of the fuel gas when forming an external flame due to the internal flame 7
The heating of e) becomes stronger. Therefore, in a preferred embodiment of the present invention, the nozzle member (7d) facing the opening (8a) of the pipe member (8), the outer diameter of the tip portion is a small diameter, and has a secondary flow opening (7s) therein.
And between the coil (7e) attached to the nozzle member (7d),
A nozzle member that forms a void (7t) and the upper end of the coil (7e)
Lower than the top of (7d). According to this, when the in-cylinder flame is formed, the fuel gas mixed with a large amount of air causes the side flow opening (7
s) partly rises through the air gap (7t), which cools the inner circumference side of the coil (7e), and the other part goes through the wire gap of the coil (7e) and outside the coil side circumference surface. And then cool the coil as it passes through the wire gap. In addition, since the upper end of the coil (7e) is lower than the upper end of the nozzle member (7d), heating of the upper end of the coil (7e) due to the in-cylinder flame is reduced, and as a result, overheating of the coil (7e) is avoided, and The life of (7e) (time to burnout) is extended. When forming an external cylinder flame, a hot flame is formed above the cylindrical member (3, 30), and none of the cylindrical member (3, 30), the nozzle member (7d) and the coil (7e) is overheated.
When forming an external flame, a part of the fuel gas mixed with a small amount of air rises through the air gap (7t), and the other part rises in the coil (7t).
It goes out through the wire gap of e) to the outside of the coil side peripheral surface, and at the place where these fuel gases mix with the outside air, the ignition means (26,
Since the fuel is ignited in 16), the probability of misfiring when forming an external flame is low.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0017]

FIG. 1 shows a pocket gas lighter which is an embodiment of the present invention, and FIG. 2 shows the lighter shown in FIG. 1 around a tubular member (3, 30) when an external flame is formed. The setting state of the members of Fig. 3 is shown in Fig. 3.
The setting state of surrounding members is shown. In addition, FIG. 1 shows a writer.
The non-use state (same as the setting which forms an external cylinder flame) which closed the cover C3 is shown.

First, referring to FIG. 1 and FIG. The casing includes a main body C1, an intermediate body C2 and a lid body C3. The intermediate body C2 is provided with a female body threaded cylindrical housing hole, the ring 30 is inserted into the lower end of the hole, the ceramic cylinder 3 is inserted onto the ring 30, and the upper end surface of the cylinder 3 is inserted. The support ring 5 to which the emission ring 4 for light emission is fixed is placed on, and the nut 6 holds the ring 5 by screwing the ring-shaped nut 6 into the female screw of the cylindrical body housing hole of the intermediate body C2. As a result, the ring 30, the ceramic cylinder 3,
The support ring 5 and the press nut 6 are integrated with the intermediate body C2. The emission ring 4 for light emission is obtained by punching out a thin iron plate having eight wire-shaped projections extending radially from the ring toward the center thereof and having a shorter radius.

Referring to FIG. 2, ring 30 is an intermediate C
It is supported by two projections that are opposed to each other and project inward in the radial direction. An arc-shaped slit (lower opening) C2s is formed between the pair of projections and the outer peripheral surface of the ring 30, and the ring is formed. The air below 30 has these slits C2s
Can enter the space between the inner wall surface of the intermediate C2 and the outer peripheral surface of the ceramic cylinder 3. Ring nut 6
There is also a considerable gap between the cylindrical leg part of the ceramic cylinder 3 and the side peripheral surface of the ceramic cylinder 3, and a large opening 6a is formed on the side peripheral wall of the cylindrical leg part of the nut 6 at a predetermined pitch over the entire circumference. If the ring 30, the ceramic cylinder 3, the ring 5, or the nut 6 is heated, the air in contact with their outer peripheral surfaces is heated, and the nut 6 / intermediate C2 is passed through the opening 6a.
Exit upward through the gap between. This air flow is shown by the dotted arrow in FIG.

A nozzle 7d and a coil 7e fixed to the tip of the flame switching cylinder 7 enter the inside of the ring 30 and the ceramic cylinder 3. The flame switching cylinder 7 is capable of sliding up and down with respect to the mixing tube 8 inside thereof, and the compression coil spring 9 gives a pushing force to the upward direction, but against this force, the flame switching lever 10 The arm 10c pushes the outer flange 7f of the flame switching cylinder 7 downward. A nozzle 7d is press-fitted into the upper end opening of the flame switching cylinder 7. The outer diameter of the nozzle 7d is large in the lower half and large in the upper half, and the auxiliary flow opening 7s is formed at a position where the diameter is switched from the large diameter to the small diameter. The large diameter portion of the nozzle 7d is press-fitted below the coil 7e so that the coil 7e is fixed to the nozzle 7d. The upper end of the coil 7e is located slightly lower than the upper end of the nozzle 7d.

The flame switching cylinder 7 has an opening 7b for discharging the fuel gas / air mixture, and a stopper ring 7i and an opening / closing plate 7g for closing the lower opening 30a of the ring 30 are mounted below the opening 7b. There is. The inner space of the flame switching cylinder 7 is a cylindrical space in which the mixing tube 8 fits perfectly.

The upper end opening 8a,
There is an air intake port 8b and a lower opening 8c. Lower opening 8c
Has a nozzle plate and a tube connecting tube 31,
A synthetic resin tube 12 having high elasticity is attached to the connecting cylinder 31.
The upper ends of are connected. The mixing pipe 8 penetrates the cap nut 32, the connecting cylinder 31 is screwed into the lower end of the mixing pipe 8, and the ring nut 33 is screwed into the lower end of the cap nut 32. The lower end of the tube 12 is connected to the tip of the fuel nozzle 13 that forms a part of the fuel gas opening / closing mechanism 27 (FIG. 1) of the fuel tank FT. The fuel nozzle 13 has a gas release lever.
No. 14 (FIG. 1) is connected to this gas release lever-1.
When 4 is rotationally driven in the clockwise direction in FIG. 1, the fuel nozzle 13 is pulled upward, and the gas flow from the fuel nozzle 13 flows through the synthetic resin tube 12 to the mixing tube 8.

The ceramic cylinder 3 is provided with a piezo (piezoelectric element).
The tip of the high pressure lead 16 of the ignition device 26 is fixed. The ground pole of the ignition device 26 includes a pin 26c, a lid supporting lever 20, a pin 23, a coil spring 24, and a cap nut 3.
2, It is electrically connected to the nozzle 7d and the wire coil 7e via the mixing pipe 8 and the flame switching cylinder 7. This is an electrical connection due to mechanical contact, and even if there is a place of poor contact, a substantial current loop is formed regarding high-voltage discharge. That is, when the piezo ignition device 26 generates a high pressure, it adds to the nozzle 7d and the coil 7e of the flame switching cylinder 7 and the tip of the lead 16 to generate an electric spark between the two, and the fuel around it. Light up. Intermediate C2
In addition to the ceramic tube 3, a cap nut 32 is supported in the tube so that the mixing tube 8 is located at the center of the ceramic tube 3. Lid C
A leaf spring 21 and a lid supporting lever 20 are fixed to the lower surface of 3 by press-fitting a pin 19 with an umbrella. Further, the leg of the pin-shaped selection button 22 with an umbrella penetrates from the upper surface to the lower surface of the lid C3, and the leg engages with the leaf spring 21 under the lower surface of the lid C3. The leaf spring 21 pushes up the selection button 22 as shown in FIG. As shown in FIG. 1, the intermediate member C2 having the ceramic tube 3 and the like and the cap nut 32 and the like attached thereto is attached to the fuel nozzle 1
3 and the fuel tank FT are engaged with the gas release lever 14 as shown in FIG. 1, and then the pin 25 is inserted into the pin hole at the lower leg end of the fuel tank FT and the intermediate body C2 to insert the intermediate body C2 into the fuel tank. The metal base 26b at the lower end of the middle case of the piezo ignition device 26 connected to the FT is inserted into the receiving hole of the fuel tank FT, and the high pressure lead 16 of the ignition device 26 is connected to the fuel tank FT. The support lever 20 fixed to the lid C3 is inserted through the upper opening of the intermediate body C2 into the inside of the support hole, and the pin engaging leg 20b of the lever 20 is inserted into the pin 26 of the ignition device 26.
C, and the pin hole of the leg of the intermediate body C3, the pin hole of the lower end of the flame switching lever 10, and the coil spring 2 slightly compressed.
4 and through the pins 24 through them, as shown in FIG. 1, the fuel tank FT, the intermediate C2, the flame switching lever-1.
0, the coil spring 24 and the lid C3 are integrally connected, so that one end of the coil spring 24 contacts the side flange of the cap nut 32 (FIG. 1) and the other end contacts the engaging projection 10b of the flame switching lever 10. And the coil spring 23 makes the flame switching lever-10.
Is driven counterclockwise, whereby the arm 10c of the flame switching lever 10 pushes the upper surface of the outer flange 7f of the flame switching cylinder 7 downward, whereby the flame switching cylinder 7 is lowered as shown in FIG. The compression coil spring 9 is compressed.

The fuel tank FT in which the intermediate body C2 and the lid C3 are connected as described above is inserted into the upper opening of the casing main body C1, and the screw 29 is passed through the hole at the bottom of the main body C1.
By screwing 9 into the screw hole at the bottom of the fuel tank FT,
The writer shown in FIG. 1 is assembled. In the assembled state (FIG. 1; setting for forming an external flame), the trunk portion 7h of the flame switching cylinder 7 substantially closes the air intake opening 8b as shown in FIG. In the place where the air intake opening 8b is formed and the lower side peripheral surface that is continuous with the place, a small amount of air is mixed in the mixing pipe 8 when the air intake opening 8b is substantially closed (setting that forms an external flame). To supply 0.
It is cut by about 1 mm, so that a gap 8 g (FIG. 2) of about 0.1 mm is formed. In this embodiment, the mixing tube 8
The diameter of the large diameter portion above the air intake opening 8b is 3 mm.
Is.

Since the opening / closing plate 7g is below the lower surface of the ring 30, the lower opening 30a is open, and the mixing pipe 8 substantially closes the mixture discharge port 7b of the flame switching cylinder 7. When fuel gas exits from 13, it exits into the inner space of the ceramic cylinder 3 through the nozzle 7d and the wire coil 7e. By the time it comes out to the inner space of the ceramic cylinder 3, a small amount of air is sucked into the fuel gas through the gap 8g and the air suction port 8b, and a small amount of air is mixed. The flame switching lever 10 is rotatable about the pin 24, but is urged to rotate counterclockwise by the repulsive force of the coil spring, and pushes down the flame switching cylinder 7 as shown in FIG. The compression coil spring 9 is compressed.
When the selection button 22 is projected upward as shown in FIG. 1, its lower end is outside the rotation circle of the engaging projection 10d of the lever 10 about the pin 24, and the lid C3 is attached to the pin 24.
Even if the selection button 22 is driven to rotate in the clockwise direction about, the lever 10 does not contact the engagement protrusion 10d of the lever 10, and the lever 10 remains at the position shown in FIG. 1 (see FIG. 1; external flame forming mode). De).

However, first, the lower leg of the selection button 22 is pin 2
4, the lower leg of the selection button 22 comes into contact with the engaging projection 10d of the flame switching lever 10 so that the flame switching lever 10 is a coil spring. The armature 10c of the lever 10 is moved upward by the clockwise rotation against the repulsive force of the compression lever 23, and the repulsive force of the compression coil spring 9 pushes the flame switching cylinder 7 upward. As shown in FIG. 3, when the stopper ring 7i contacts the ring 30, the rise of the flame switching cylinder 7 is stopped, but in this state, the trunk portion 7h of the flame switching cylinder 7 has the air intake opening 8
The air intake opening 8b is opened by moving above b. The opening / closing plate 7g comes into contact with the lower surface of the ring 30 and thereby the lower opening 30
Since a is closed and the air-fuel mixture discharge port 7b of the flame switching cylinder 7 moves upward from the upper end of the mixing pipe 8 and opens, if fuel gas exits from the fuel nozzle 13, a negative pressure due to the fuel gas flow causes the opening 8b. A large amount of air is sucked into the mixing pipe 8 from the above, and the fuel gas / air mixture is discharged into the inner space of the ceramic cylinder 3 through the discharge port 7b, the nozzle 7d and the wire coil 7e. A large amount of air is already mixed in the fuel gas when it exits the inner space of the ceramic cylinder 3 (in-cylinder flame formation mode).
De). Next, the usage mode and operation of the cigarette gas lighter having the above structure will be described.

1. External-cylinder flame formation mode (from FIG. 1 to FIG. 2) The user holds the main body C1 and the intermediate body C2 of the casing with the index finger and middle finger of the right hand, and presses the selection button 2 with the thumb of the right hand.
When the lid C3 is rotated clockwise without touching the piezo 2, the piezo ignition device 2 is rotated by the clockwise rotation of the support lever 20.
6, the outer case 26a is pushed down via a pin 26c which is erected on the outer case 26a, and a return spring (not shown) is compressed in the device 26 and is supported by a hammer plunger (not shown) for high-pressure impact. The coil spring of is compressed. In this process, first, the pin 26d of the outer case 26a hits the gas release lever 14, the lever 14 is rotationally driven in the clockwise direction, the fuel nozzle 13 is pulled up, and the fuel gas flows out into the mixing pipe 8. Since the selection button 22 does not contact the engaging projection 10d of the flame switching lever 10, the flame switching lever 10 remains at the position shown in FIG. 1, and the mixing pipe 8 and the flame switching cylinder 7 are at the positions shown in FIGS. 1 and 3. The fuel gas remaining from the fuel nozzle 13 passes through the nozzle 7d and the wire coil 7e into the inner space of the ceramic cylinder 3. Due to this fuel gas flow, a small amount of air is sucked into the mixing pipe 8 through the air suction opening 8b and the gap 8g (FIG. 2), mixed with the fuel gas, and discharged into the inner space of the ceramic cylinder 3.

The fuel gas mixed with a small amount of air, which is insufficient for complete combustion, is jetted upward from the upper end of the nozzle 7, and part of it is discharged from the sidestream opening 7s in the radial direction of the pipe.
The coil 7e rises up through the gap 7t or passes through the gap between the wires of the wire coil 7e from the gap 7t to the coil 7e.
On the outer surface of. The air that enters the cylinder 3 that enters from the lower opening 30a of the ring 30 mixes with such a substream. Lower opening 3
Since the air entering the cylinder 3 from 0a flows upward so as to cover the low-air amount fuel gas discharged from the nozzle 7 from below,
In the inner space of the ceramic cylinder 3, the fuel gas concentration is higher and the air concentration is lower as it is closer to the central axis. Conversely, high pressure
The fuel gas concentration is lower and the air concentration is higher as it is closer to the tip surface of the door 16.

Shortly before the lid C3 is completely opened, in the ignition device 26, the hammer plunger is unlocked by a taper cam mechanism (not shown), and the hammer plunger suddenly moves the piezoelectric element by the repulsive force of the coil for high-pressure impact. An electric spark is generated between the high voltage lead 16 and the wire coil 7e due to impact, and the mixture ratio of the fuel gas / air mixture on or around the path of this electric spark is ignited. The air-fuel mixture ignites in a suitable place.

In this way, the flame rises from the ceramic cylinder 3, but like the flames of candles and matches, the fuel gas concentration is high at the center, so the center is oxygen deficient (internal flame),
The outer and upper parts where oxygen concentration is high become red external flames. That is, a natural flame with a pale inner flame inside and a red flame outside the bottom rises above the ceramic cylinder 3. When the tip of the cigarette is brought close to this flame, it catches fire. Since the fuel gas is not combusted at the position passing through the eight radial wedge-shaped protrusions of the emission ring 4, the wedge-shaped protrusions do not change color.

As is well known, the flame generated above the ceramic tube 3 is easily extinguished by the wind, but the user can easily see the ignition. When there is no wind outdoors or indoors, this red flame gives the user a feeling of tranquility.

2. Cylinder flame formation mode (from FIG. 1 to FIG. 3) The user holds the main body C1 and the intermediate body C2 of the casing with the index finger and middle finger of the right hand and presses the selection button 2 with the thumb of the right hand.
When pressing 2 and rotating the lid C3 (Fig. 1) clockwise,
As in the case of the external flame forming mode, the fuel gas is discharged from the fuel nozzle 13 to generate the electric spark between the electrode 16 and the coil 7e, but by the time the electric spark occurs,
As described above, the lower leg of the selection button 22 hits the engaging projection 10d of the flame switching lever 10, and the flame switching lever 10 is rotationally driven clockwise against the repulsive force of the coil spring 23 (see FIG. 3). ), Whereby the fuel gas / air mixture exits into the inner space of the ceramic cylinder 3 through the discharge port 7b and the nozzle 7d. When exiting into the inner space of the ceramic cylinder 3, a large amount of air is already mixed in the fuel gas.

Therefore, when an electric spark is generated, the air-fuel mixture is ignited on or around the path of the spark, where the mixture ratio of the air-fuel mixture is suitable for ignition. Due to this ignition, the inner space of the ceramic cylinder 3 becomes combustion gas, which glows the emission ring 4 for light emission and exits from the opening (upper end opening) of the holding ring 6 at high speed. The combustion gas is transparent or bluish, but due to this flame, the inner ends of the eight radial wire-shaped projections of the emission ring 4 become red and become red, and combustion is occurring in the ceramic tube 3. I understand. When the tip of the cigarette is brought close to above the opening of the holding nut 6, there is a fire. Since the holding nut 6, the ceramic cylinder 3 and the ring 30 prevent the outside wind from blowing off the combustion gas, the combustion gas is unlikely to misfire with respect to the wind. That is, there is a windproof effect.

In this in-cylinder flame forming mode, since the fuel gas burns in the ceramic cylinder 3, the ceramic cylinder 3, the ring 5 and the nut 6 are heated by the in-cylinder flame. Therefore, although the temperature of the ceramic cylinder 3 and the like rises, it passes through the slit C2s, the gap 6b, and the opening 6a of the intermediate body C2,
Since the air flow (shown by the dotted arrow in FIG. 3) passing from below the ring 30 to above the intermediate body C2 along the outer peripheral surface of the ceramic cylinder 3 robs the heat of the ceramic cylinder 3, etc., the temperature of the ceramic cylinder 3, etc. The increase is suppressed to some extent, and the temperature increase of the intermediate C2 is suppressed.

In the embodiment described above, the emission ring 4 for light emission is provided at the upper end opening of the ceramic tube 3 in order to make it easy to see the existence of the in-cylinder flame. No inconvenience to attach. Further, in order to further enhance the wind resistance effect, the emission ring 4 for light emission may be replaced with a catalyst wire. If the in-cylinder flame is formed, if a strong wind blows into the cylinder 3 from the upper opening of the ceramic cylinder 3 and the in-cylinder flame is extinguished temporarily when the in-cylinder flame is formed, due to the action of the hot catalyst wire Because the combustion gas automatically reignites,
Higher wind resistance.

[0036]

As described above, when the external flame is formed,
Since a small amount of air, which is insufficient for complete combustion, is supplied to the fuel gas of the pipe member (8) through the ventilation port (8c), the fuel gas that flows through the hollow body (7) to the tubular member (3, 30). A small amount of air is mixed therewith, which reduces ignition mistakes of the fuel gas by the ignition means (26, 16). In particular, when the tubular members (3, 30) are made small, the effect of reducing ignition mistakes is high.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view around the ceramic cylinder 3 shown in FIG. 1, showing a setting state in which an external flame is formed.

FIG. 3 is an enlarged cross-sectional view around the ceramic cylinder 3 shown in FIG. 1, showing a setting state for forming an in-cylinder flame.

[Explanation of symbols]

3: Ceramic tube 4: Radiation ring for light emission 5: Support ring 6: Holding nut 7: Flame switching tube 7b: Mixture discharge port 7d: Nozzle 7e: Wire coil 7f: Outer flange 7g: Open / close plate 7h: Trunk 7i: Stopper Ring 8: Mixing pipe 8a: Upper opening 8b: Air inlet 8c: Lower opening 9: Compression coil spring 10: Flame switching lever 12: Synthetic resin tube 13: Fuel nozzle 14: Gas release lever 16: High pressure lever −
Do

Claims (4)

[Claims] 1. A tubular member (3, 30) having an upper end opening;
An opening (8a) for releasing fuel gas into the inner space of (3,30),
A fuel gas receiving opening (8c) below the opening (8a), and
The air inlet (8) that opens to the side between these openings (8a / 8c)
a pipe member (8) including b) for supplying fuel to the inside of the tubular member (3, 30); a gas supply valve (27) for supplying fuel gas to the fuel gas receiving opening (8c) A fuel tank (FT) having
A gas release lever for driving the gas supply valve (27) to open.
(14); an ignition means (26, 16) for igniting the fuel gas in the inner space of the tubular member (3, 30); and a casing including an upper opening and a lid member (C3) for opening and closing the upper opening. -A gas combustion device comprising a single (C1, C2, C3); an air inlet (30a) provided in the tubular member (3, 30) below the upper end opening; the tubular member (3, 30) ) Air intake (30
The opening / closing member (7g) for opening / closing a) and this opening / closing member (7g)
When the g) is in a position to close the air intake port (30a), the air intake port (8b) is opened, and when the air intake port (30a) is in the open position, the air intake port (8b) is closed. A hollow body (7) coupled to the pipe member (8); and a fuel gas flow path from the gas supply valve (27) to the air intake port (8b), the opening / closing member (7g) Is in a position to close the air intake (30a), gas combustion characterized by having a vent passage (8c) for supplying a small amount of air insufficient to completely burn the fuel gas apparatus. 2. The gas combustion device according to claim 1, wherein the ventilation passage (8c) is a gap between the hollow body (7) and the pipe member (8). 3. Between the outer peripheral surface of the tubular member (3, 30) and the casing (C1, C2, C3), the outer peripheral surface of the tubular member (3, 30) extends from the lower side to the upper side. A relatively wide gap (C
2s, 6b, 6a) is formed, The gas combustion apparatus of Claim 1 or Claim 2. 4. The hollow body (7) is a tubular member of the pipe member (8).
The opening (8) for discharging the fuel gas into the inner space of (3, 30)
Nozzle member (7d) facing the a) and having a small outer diameter at the tip and having a sidestream opening (7s), and the nozzle member
A coil (7e), which is attached to (7d), has a gap (7t) between it and the outer circumference of the tip, and the upper end is located below the upper end of the nozzle member (7d). The gas combustion device according to claim 2 or 3.