JPH01123908A - Infrared burner - Google Patents

Abstract

PURPOSE:To spread the combustion surface of a combustion plate with a relatively small quantity of heat by providing burner port groups at a first band shaped part formed along the direction of a diagonal divided at the intermediate part of a combustion plate and a second band shaped part positioned on both sides of the combustion plate. CONSTITUTION:In a gas burner 1 wherein a combustion exhaust gas flows from one end of a combustion plate 2 toward another end thereof, burner port groups 3 are formed at a first band shaped part A1 formed along the direction of a diagonal divided at the intermediate part of the combustion plate 2, and a second band shaped part A2 positioned on both sides of the combustion plate 2 and continued at its both ends to the first band shaped part A1. By doing so, it is possible to distribute heat to one end, another end and the central part of the combustion plate 2 by the burner port group 3 applied to the first band shaped part. At the same time, it is also possible to distribute heat to both sides of the combustion plate 2 by the burner port group 3. Accordingly, heat can be distributed over substantially the entire region of the combustion plate 2. Further, since the burner port group 3 is concentrated on the band-shaped parts A1 and A2, excellent combustion of the combustion plate can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an infrared burner mainly used as a top burner in a rear exhaust type grilled food cooker.

(Prior Art) Generally, a combustion plate for an infrared burner has flame ports uniformly provided over its entire surface.

(Problem to be solved by the invention) However, this can be achieved by, for example, requiring only a relatively small amount of heat.
Moreover, if the combustion plate installed in the top burner of a rear-exhaust type pottery cooker, which requires a large combustion surface area, is equipped with the usual number of flame holes at the usual pitch intervals, the amount of heat will be excessive. If it is too hot, it may not be possible to perform good baking. Therefore, it is possible to reduce the amount of gas supplied, but in this case, the load on each burner port will decrease, and the temperature of the combustion plate will not rise sufficiently, making combustion unstable, especially in the early stages of ignition. There is a problem with making it easier to lift.

Therefore, it is possible to reduce the number of flame ports, but if the pitch of the flame ports is increased and the number of flame ports is reduced, the temperature of the part of the combustion plate where the flame ports are provided will not rise, resulting in poor combustion as described above. There is a problem with stability.

It may be possible to solve this problem by concentrating the flame openings on a part of the combustion plate, but doing so causes a problem in that the heat distribution becomes uneven and the food cannot be heated evenly.

In other words, for burners that require a relatively small amount of heat and require a large combustion surface on the combustion plate, seeking to improve combustibility will result in poor heat distribution; If you try to do so, there is a problem that the flammability will deteriorate.

The object of the present invention is to obtain an infrared burner which is free from any drawbacks.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a gas burner which is provided in a gas burner body so that combustion exhaust flows from one end of a rectangular combustion plate provided in the gas burner body to the other end. a first band-shaped portion along a diagonal line separated by at least an intermediate portion between one end and the other end of the combustion plate; and a first band-shaped portion located on both sides of the combustion plate and having both ends thereof. The burner port group is provided in a continuous second band-shaped portion.

(Function) In this case, the first end and the other end of the combustion plate and the first end of the combustion plate are connected by a group of flame holes provided on the first band-shaped part along the diagonal line divided by the middle part between one end and the other end of the combustion plate. Heat can be distributed to the central part, and heat can be distributed to both sides by the burner holes provided on the second band-shaped part located on both sides of the combustion plate and whose both ends are continuous with the first band-shaped part. As a result, heat can be distributed over almost the entire area of the combustion plate, and since the burner ports are concentrated in the band-shaped portion, the temperature in the front portion of the burner port is kept relatively high and combustion is facilitated. Even if the number of flame ports is smaller than the total area of the plate, good combustion can be achieved.

(Example) An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 denotes a rectangular combustion plate 2, for example, a rear exhaust type grill cooker (not shown) so that exhaust gas flows from one end of the combustion plate 2 to the other end as shown by the arrow in FIG.
It is used by being installed facing downwards on the top of the interior, and there is no particular difference from what is known in the past.

The present invention provides a first combustion plate along a diagonal direction separated by an intermediate portion between one end and the other end of the combustion plate 2.
A burner port group 3 is provided on a band-shaped part A and a second band-shaped part A2 located on both sides of the combustion plate 2 and whose both ends are continuous with the first band-shaped part A1, and this is shown in the figure. To explain this in more detail, in the first embodiment shown in Figs. The strip-shaped part A of the inner box 1 of the burner port group 3 that has been applied is divided in the center by A4. , to 85.4, and the diagonals Al-1 and A1-2 and A1,3
and A1, 4, a third band-shaped part A3 parallel to the edge connecting them is provided with a flame port group 3 that functions as a fire transfer, and the second band-shaped part A2 is configured to be bent in a dogleg shape, Both ends thereof are continuous with the first band-shaped portion A1, and furthermore, a burner port group 3 which mainly functions as a flame transfer and an afterburner is also provided in the band-shaped portion A4 along the rear end of the first band-shaped portion A1.

Note that a third band-shaped portion A3. connects the inner end of the first band-shaped portion A. A3 is formed into a 7-shape with both sides facing forward as in the second embodiment shown in FIG. The second band-shaped portion A3. The heat distribution can also be adjusted by A3.

Furthermore, in the first embodiment in which the first band-shaped portion A1 to the fourth band-shaped portion A4 are provided with the burner port group 3, the fourth embodiment shown in FIG. 5 When providing the burner port group 3 on the band-shaped portion A5, the front and rear plates 2
The patterns of the burner port groups 3 applied to the burner ports 2a and 2a are the same, thereby eliminating the inconvenience of producing the plates 2a and 2a with different patterns of the burner port groups 3 on the front and rear as in the previous embodiment.

In addition, it is inevitable that the part where the burner port group 3 is provided will be more fragile than other parts, especially if the burner port group 3 is long in a straight line as shown in the first to fourth embodiments. Particularly along this area, the product becomes fragile.

In order to prevent this, in the fifth embodiment shown in FIG. 7, a meandering portion is added in the middle of the first band-shaped portion A1.

In all of the first to fifth examples, the baking performance (ability to uniformly heat the food) was good, and the flammability (co/c02 value) was also good. .

This is shown in the table below for the second embodiment, and the table below shows this for the fourth embodiment.

In the illustrated embodiment, the band-shaped portion A provided with the burner port group 3 is
, to A5 and the portions along both sides of the combustion plate 2, a diamond cut or other incision was made on the surface of the combustion plate 2 to form a large number of protrusions 5 on the surface of the combustion plate 2. In this case, in the part where the burner port group 3 is provided, the protrusion 5 becomes red hot due to the flame from the burner port group 3, and the temperature of the part where the burner port group 3 is provided can be further increased. The protrusion 5 also becomes red hot due to the exhaust gas, which expands the width of the red hot part and increases the temperature of the flame opening 03 at both ends of the band-shaped parts A1 to A5, thereby further promoting combustion. In addition, the band-shaped portion A
If unpierced holes 4 of the same pitch as the flame openings are provided in the portions located on both sides of A5 to A5, as shown in FIG.
It is possible to reduce the heat capacity of the combustion plates 2 on both sides of the flame nozzles 1 to A5, thereby increasing the rate of temperature rise in the area where the burner port group 3 is applied, and further suppressing the occurrence of lift especially at the initial stage of ignition. obtain.

It should be noted that there is a large difference in specific heat between the part of the combustion plate 2 that does not have the burner port group 3 and the part that has it.
This is one of the causes of cracking.

In order to prevent this as much as possible, by making cuts such as the diamond cut mentioned above in the part without the burner port group, or by making unpierced holes at a pitch several times the pitch of the burner port, the part without the burner port group can be treated as a part without the burner port group. It is possible to reduce the difference in specific heat between a certain part and eliminate the above-mentioned problems.

Note that it is desirable that the gas burner, which is installed facing downward in the top of a grilled food cooking device, be made thin in order to keep the space inside the cooking device as large as possible.

To achieve this, it may be possible to make the gas distribution chamber 6 thinner, but this would result in insufficient gas supply to the other side.

Therefore, the gas burner body 1 shown in FIGS. 8 to 10 has a concave groove 7 formed in the ceiling plate of the gas distribution chamber 6 from one end to the other.
This was strengthened by adding a layer of gas to ensure that the gas could easily flow to the other side.

In addition, in the drawing, 8 indicates a plate piece with a -8= surface on the bottom side of the root of the groove 7, which prevents the distribution ratio of the air-fuel mixture on the root side of the gas distribution chamber 6 from becoming high. is.

(Effects of the Invention) As described above, according to the present invention, the first
Heat can be distributed to one end, the other end, and the center of the combustion plate by a group of burner holes provided on the strip-shaped portion, and a second flame port located on both sides of the combustion plate and having both ends communicated with the first strip-shaped portion can be used. Heat can be distributed to both sides of the center by the burner holes provided on the band-shaped part, and the heat can be distributed almost over the entire area of the combustion plate, and the burner holes are also concentrated on the band-shaped part. Therefore, the temperature of the flame port group portion of the combustion plate is maintained at a relatively high temperature, and a combustion burner that can perform good combustion even if the number of flame ports is small compared to the total area of the combustion plate is developed. There is an effect that can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an example of the implementation of the present invention, Fig. 2 is a front view of the combustion plate, Fig. 3 is an enlarged cross-sectional view taken along the line ■-■, and Figs. 4 to 7 are the combustion plate. Front view of a modified example,
FIG. 8 is a slope view of the gas burner as seen from above, FIG. 9 is an enlarged slope view of a portion thereof, and FIG. 10 is a slope view of the gas burner as seen from below with the combustion plate removed. 1... Gas burner body 2... Combustion plate 3.
...flame mouth group A1...first band-shaped part A2.
・・Second band-shaped part A3...Third band-shaped part A4...
・Fourth band-shaped part A5...Fifth band-shaped part Patent applicant Rinnai Corporation

Claims (1)

[Claims] In a gas burner installed so that combustion exhaust flows from one end of a rectangular combustion plate provided in the gas burner body toward the other end, a diagonal line divided at least at the midpoint between one end and the other end of the combustion plate. An infrared burner comprising the burner port group provided in a first band-shaped portion along the direction and a second band-shaped portion located on both sides of the combustion plate and having both ends continuous with the first band-shaped portion.