JPH018832Y2 - - Google Patents

Description

[Detailed explanation of the idea] 【Technical field】

The present invention relates to a ceramic burner device used, for example, as a stove.

[Background technology]

In conventional burner devices of this type, small holes are provided evenly throughout the ceramic burner, so even the upper end of the ceramic burner, which is just below the top surface of the casing housing the ceramic burner and ceramic radiant plate, Gas was being combusted, and the combustion position was close to the top of the casing, so the heat of combustion of the gas was easily transmitted to the top of the casing, causing the casing surface to become hot and potentially causing burns.

[Purpose of invention]

The present invention was developed in view of the above technical background, and its purpose is to prevent the upper surface of the casing from being overheated due to the heat of combustion of gas, thereby reducing the risk of burns. There is a particular thing.

[Disclosure of invention]

The burner device of the present invention has a ceramic burner 2 which has a large number of small holes 1 and allows gas to pass from the back side to the front side, and a ceramic radiant plate 8 which is red-hot and radiates heat rays and is installed vertically in a casing 6, facing each other. A gas combustion chamber 9 is formed between the front surface of the ceramic burner 2 and the back surface of the ceramic radiant plate 8, and a non-porous part 7 without small holes 1 is provided in the upper part of the ceramic burner 2. Through this, we have achieved the above objective. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Reference numeral 2 denotes a planar ceramic burner that is used vertically. Many small holes 1 are bored on almost the entire surface except for the periphery, and many irregularities are formed on the front surface. Gas can pass through almost the entire area from the back to the front in a planar manner. As shown in FIG. 1, the small holes 1 have a large diameter hole with a large opening ratio below the ceramic burner 2, and have a small opening ratio with a small hole above the ceramic burner 2. As a method of changing the aperture ratio of the ceramic burner 2, in addition to changing the diameter of the small holes 1 as described above, it is also possible to change the density of the small holes.
Further, a non-porous portion 7 is provided in the upper portion of the ceramic burner 2, which is wider than the other portions without holes on the periphery. Reference numeral 5 denotes a decompression chamber that lowers the pressure of the gas fed from the introduction hole 4 through a gas pipe (not shown).The decompression chamber 5 is installed inside the casing 6, and the ceramic burner 2
is attached to the front opening of the decompression chamber 5 to close the front opening of the decompression chamber 5. Furthermore, a ceramic radiation plate 8 is attached to the casing 6 with a gap in front of the ceramic burner 2.
The gap between the ceramic radiator plate 8 and the ceramic radiator plate 8 forms a gas combustion chamber 9. This type of burner device has a structure in which the combustion chamber 9 between the ceramic burner 2 and the ceramic radiant plate 8 is filled with gas for combustion, and high gas pressure is not required, but rather increases the gas pressure. If it is too high, there is a danger that flames will spew out from the ceramic radiant plate 8, so a decompression chamber 5 is provided behind the ceramic burner 2 to lower the gas pressure. The ceramic radiant plate 8 is perforated with a large number of through holes 12 in a honeycomb shape (the shape of the through holes 12 is not limited to hexagonal or square), and the ceramic radiant plate 8 is larger than the ceramic burner 2. be. Primary air is fed into the combustion chamber 9 from the air intake port 3 on the lower surface of the casing 6, and a secondary air supply bypass passes from behind the decompression chamber 5 to the upper part of the combustion chamber 9. A channel 10 is formed. Further, as shown in FIG. 3, a recess 11 is cut out in the lower front surface of the ceramic burner 2, and a thermocouple 13 is fitted in the recess 11. Furthermore, this thermocouple 13
is used to detect the temperature of the flame, and is used, for example, to control the temperature of the flame to be kept constant, or to detect when the flame goes out due to an accident and stop the gas supply. It is used for such things. When the ignition operation is performed, a valve (not shown) opens and gas flows into the decompression chamber 5, where the gas pressure is adjusted to a small level. The reduced pressure gas flows out from the entire small hole 1 of the ceramic burner 2 and is combusted in the combustion chamber 9 on the surface of the ceramic burner 2. The gas burning in the combustion chamber 9 makes the ceramic radiant plate 8 red-hot, and the red-hot ceramic radiant plate 8 radiates heat rays to warm the front of the ceramic radiant plate 8. Further, the gas after combustion is exhausted upward through the opening on the top surface of the casing 6.
As the combustion gas rises in this way, the temperature may be low at the bottom and high at the top, making the temperature uneven. However, in this invention, the small holes 1 of the ceramic burner 2 have a large aperture ratio at the bottom. Since the aperture ratio is small at the top, a relatively large amount of gas is allowed to flow out from the small hole 1 at the bottom where the aperture ratio is large.
A relatively small amount of gas is allowed to flow out from the small holes 1 at the top, which have a small aperture ratio, and the distribution of radiated heat is made uniform. In addition, since the high temperature gas in the combustion chamber is discharged upward, there is a risk that the upper surface of the casing 6 will be heated and reach a high temperature. Since it is lowered, heating of the upper surface of the casing 6 can be avoided. When there is a lack of oxygen in the room, gas burns in the lower part of the combustion chamber 9 near the air inlet, but since the oxygen is consumed in the lower part, the upper part becomes oxygen deficient and the flame may spread upward. As the vertical passage portion 10a of the secondary air supply bypass passage 10 is heated by radiant heat, an upward flow is generated, and air is supplied to the upper part of the combustion chamber 9, thereby preventing an oxygen deficiency state from occurring even in the upper part of the combustion chamber 9. It is avoided.

[Effect of the idea]

As described above, this invention provides a non-porous part without small holes in the upper part of the ceramic burner, so gas is not supplied from the upper part of the ceramic burner, and the combustion position of the gas is lowered to the upper part of the casing. This can reduce heat conduction to the top surface of the casing, avoid overheating the top surface of the casing, and reduce the risk of burns when touching the top surface of the casing. This has the advantage that heat will not be conducted to unnecessary parts such as the mounting plate where the equipment is attached, resulting in poor thermal efficiency.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a front view of the same with the ceramic radiant plate removed, and Fig. 3 is a partially broken perspective view showing the ceramic burner and thermocouple. , FIG. 4 is a partially broken perspective view of the ceramic radiant plate, and 1 is a small hole;
2 is a ceramic burner, 6 is a casing, 7 is a non-porous part, 8 is a ceramic radiation plate, and 9 is a combustion chamber.

Claims (1)

[Scope of utility model registration request] A ceramic burner that has many small holes and allows gas to pass from the back side to the front side, and a ceramic radiant plate that is red-hot and radiates heat rays are installed vertically inside the casing, facing each other, and the front side of the ceramic burner and the ceramic radiant plate are placed opposite each other. A burner device in which a gas combustion chamber is formed between the ceramic burner and the back surface, and a non-porous part without small holes is provided in the upper part of the ceramic burner.