JPS636582Y2 - - 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, gas is supplied from the ceramic burner to the combustion chamber between the ceramic burner and the ceramic radiant plate, air enters only from the air intake at the bottom of the combustion chamber, and heat is released from above. I was starting to leave. Therefore, when there is a lack of oxygen in the room, the oxygen in the air is consumed in the lower part of the combustion chamber, causing a lack of oxygen in the upper part of the combustion chamber and causing flames.

[Purpose of invention]

The present invention was developed in view of the above-mentioned technical background, and its purpose is not only to supply primary air from below the combustion chamber, but also to supply secondary air to the upper part of the combustion chamber. By supplying the gas, the gas can be sufficiently combusted even when the room is deficient in oxygen.

[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 an air intake port 3 is provided on the lower surface side of the combustion chamber 9. This is characterized by the provision of a secondary air supply bypass passage 10 that passes through the combustion chamber and reaches the upper part of the combustion chamber, thereby achieving the above object. 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 are formed with large diameter holes below the ceramic burner 2 to increase the aperture ratio, and are formed with small hole diameters above the ceramic burner 2 to reduce the aperture ratio. 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.
Furthermore, a wide non-porous portion 7 is provided at the top of the ceramic burner 2. 5 is gas piping (not shown)
This is a decompression chamber that lowers the pressure of the gas sent through the introduction hole 4. 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 and
The front opening is blocked. Further, in front of the ceramic burner 2, a ceramic radiation plate 8 is provided with a gap between the ceramic burner 2 and the ceramic radiator plate 8.
is attached to the casing 6, and the gap between the ceramic burner 2 and the ceramic radiant plate 8 forms a gas combustion chamber 9. This type of burner device includes a ceramic burner 2 and a ceramic radiator plate 8.
The structure is such that the combustion chamber 9 between the two is filled with gas and burned, and high gas pressure is not necessary.On the contrary, if the gas pressure is too high, the ceramic radiant plate
Since there is a danger of flames spewing out, a decompression chamber 9 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 further passes vertically behind the decompression chamber 5 and horizontally above it to enter the combustion chamber 9. A secondary air supply bypass path 10 is formed leading to the upper part. In addition, as shown in FIG. 3, a recess 11 is cut out in the lower front of the ceramic burner 2, and a thermocouple 1 is installed in the recess 11.
3 is fitted in the recess 11. The 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 detect the gas. This is used for purposes such as stopping supply. 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 made smaller in the upper part, a relatively large amount of gas flows out from the small hole 1 at the bottom where the aperture ratio is large, and a relatively small amount from the small hole 1 at the top where the aperture ratio is small. gas is allowed to flow out, and the distribution of radiated heat becomes uniform. In addition, since the high temperature gas after combustion is discharged upward, the casing 6
There is a risk that the top surface of the casing 6 will be heated and become high temperature, but since the non-porous part 7 is provided at the top of the ceramic burner 2 and the gas combustion position is lowered, heating of the top surface of the casing 6 can be avoided. When there is insufficient oxygen in the room, gas burns in the lower part of the combustion chamber 9 near the air intake port 3, but since the oxygen is consumed in the lower part, the upper part becomes oxygen deficient, and the flame may extend upward. , the vertical passage portion 10a of the secondary air supply bypass passage 10 is warmed by radiant heat, producing an upward flow, which supplies air to the upper part of the combustion chamber 9, causing an oxygen-deficient state even in the upper part of the combustion chamber 9. is avoided.

[Effect of the idea]

As described above, the present invention not only supplies primary air into the combustion chamber from below through the air intake port, but also supplies secondary air to the upper part of the combustion chamber through the secondary air supply bypass passage. This method has the advantage that gas can be burned almost uniformly within the combustion chamber, and that air can be supplied to the upper part of the combustion chamber to sufficiently combust the gas even when the chamber is in an oxygen-deficient state. Moreover, the secondary air supply bypass passage is arranged to pass vertically behind the ceramic burner and reach the upper part of the combustion chamber, so when it is heated by the combustion heat of the gas, it causes an upward flow to the part passing vertically. This has the advantage that air is forced into the upper part of the combustion chamber.

[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, 3 is an air intake port, 6 is a casing, 7 is a non-porous part, 8 is a ceramic radiation plate,
9 is a combustion chamber, and 10 is a secondary air supply bypass passage.

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 gas combustion chamber is formed between the combustion chamber and the back surface, an air intake port is provided on the lower surface side of the combustion chamber, and a secondary air supply bypass path is provided that passes vertically behind the ceramic burner and reaches the upper part of the combustion chamber. Burner device.