JP2009250563A - Plate type burner for gas stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress generation of CO in a lateral part on each right and left side of a combustion plate 5, in a plate type burner for a gas stove which includes the combustion plate having multiple burner ports 51, is installed in a gas stove in an erected state so that the combustion plate faces forwards, includes multiple rhomboid projecting parts 52 and recessed parts 53 surrounding the projecting parts on the front face of the combustion plate and includes the plurality of burner ports opened on the respective projecting parts and recessed parts. <P>SOLUTION: A recessed groove 54 extended vertically straightly and having depth shallower than that of the recessed part 53 is formed in the lateral part on each right and left side in a burner port formation region on the front face of the combustion plate 5. Each projecting part 52 adjacent to the recessed groove 54 is formed to have a shape in which part of the rhomboid is cut off by the recessed groove 54. The plurality of burner ports 51 are opened on the recessed groove 54 so as to be positioned at a vertical intermediate position of each projecting part 52 cut off by the recessed groove 54 and above and below the intermediate position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a plate-type burner for a gas stove that includes a combustion plate having a large number of flame holes, and is installed in a standing posture so that the combustion plate faces forward.

  Conventionally, in this type of plate burner, a large number of rhombus-shaped convex portions and concave portions surrounding the convex portions are formed on the front surface of the combustion plate, and a plurality of flame holes are formed in each convex portion and each concave portion. According to this, each convex part is not only heated by the flame of the flame hole opened in this, but is also heated by the flame of the flame hole established in the surrounding concave part, and is efficiently red-hot, from the combustion plate Infrared radiation efficiency is improved.

By the way, in a plate-type burner for gas stoves installed in a standing posture, the combustion state in the lower side of the front of the combustion plate and the side of the left and right sides of the flame is caused by heat dissipation to the surroundings and surrounding air. It becomes unstable due to cooling or the like, and CO is likely to be generated. Even if CO is generated at the lower front portion of the combustion plate, this CO is heated and oxidized in the process of rising along the front surface of the combustion plate and converted into CO _2. The CO generated on the side of the side is discharged into the room as it is, which causes a problem.

  Here, in the plate-type burner for the grill that is installed so that the combustion plate faces downward on the ceiling of the grill, according to Patent Document 1, the sides of the flame hole forming region on the lower surface of the combustion plate on the both sides in the grill width direction, It is known that a second recess deeper than the recess surrounding the rhombus-shaped protrusion formed on the lower surface of the combustion plate is formed, and a flame hole is opened in this recess. In this structure, the convex portion adjacent to the second concave portion is heated and kept warm from the deep portion by the flame of the second concave portion, and the generation of CO from the vicinity of the side portion is prevented. In addition, in the thing of patent document 1, the side inside the horizontal direction of a 2nd recessed part is formed in the zigzag shape which follows the outline of the rhombus of an adjacent convex part.

  In order to prevent the generation of CO from the vicinity of the left and right sides of the front surface of the combustion plate in the gas stove plate burner, the technique described in Patent Document 1 is applied to the left and right sides of the front surface of the combustion plate. It is conceivable that a second concave portion deeper than the concave portion surrounding the rhombic convex portion is formed in the zigzag shape along the contour of the adjacent convex portion, and a flame hole is opened in the second concave portion.

However, if such deep second concave portions are formed on the left and right sides of the front surface of the combustion plate, the strength of the combustion plate is reduced.
JP-A-8-135930

  In view of the above, the present invention is a gas stove plate burner that can suppress the generation of CO from the vicinity of the left and right sides of the front surface of the combustion plate without reducing the strength of the combustion plate as much as possible. The challenge is to provide

  In order to solve the above-mentioned problems, the present invention is a plate-type burner for a gas stove provided with a combustion plate having a large number of flame holes and installed in a standing posture so that the combustion plate faces forward. The front surface of the combustion plate is formed with a large number of rhombus-shaped convex portions and concave portions surrounding the convex portions, and each of the convex portions and the concave portions has a plurality of flame holes. Concave grooves that extend straight in the vertical direction are formed on the left and right sides of the hole forming region, and each convex part adjacent to the concave groove is formed in a shape in which a part of the rhombus is cut away by the concave groove. A plurality of flame holes are formed in the groove so as to be positioned in the middle in the vertical direction of the portions of the respective convex portions cut away by the concave groove and above and below the groove.

  According to the present invention, since the portion matching the concave groove of each convex portion adjacent to the concave groove is scraped off, the heat capacity of these convex portions is reduced. Furthermore, since the flame hole opened in the groove is located in the middle in the vertical direction of the portion of each convex portion scraped by the concave groove and above and below, each convex portion adjacent to the concave groove has a reduced heat capacity. Together, they are efficiently heated by the flames in these flame holes. Therefore, in order to prevent the strength of the combustion plate from being reduced as much as possible, even if the depth of the concave groove is shallower than the depth of the concave portion, each convex portion adjacent to the concave groove is heated to a high temperature, The generation of CO from the vicinity of the side portion can be suppressed.

  Referring to FIG. 1, reference numeral 1 denotes a gas stove. The gas stove 1 includes a reflection case 2 that opens forward and upward, and a plate-type burner 3 is disposed on the rear side of the reflection case 2 so as to face a window portion 2a opened in the rear plate portion of the reflection case 2. is set up. The reflection case 2 is covered from the upper side to the front side by a guard net 2b.

  The plate-type burner 3 includes a ceramic combustion plate 5 attached to an opening surface of a box-shaped burner body 4. The burner 3 is installed in a standing posture such that the combustion plate 5 faces forward. In the present embodiment, the plate type burners 3 are arranged in a pair of upper and lower sides.

  With reference to FIGS. 2 and 3, the combustion plate 5 is formed with a plurality of flame holes 51 for ejecting a mixture of fuel gas and primary air supplied into the burner body 4. Further, a large number of horizontally long rhombus-shaped convex portions 52 and concave portions 53 surrounding the convex portions 52 are formed on the front surface of the combustion plate 5, and four flame holes 51 are formed in each convex portion 52. A plurality of flame holes 51 are formed in the recess at an equal pitch. Therefore, each of the convex portions 52 is not only heated by the flame of the flame hole 51 opened in the same, but is also heated by the flame of the flame hole 51 opened in the surrounding concave portion 53, and efficiently becomes red-hot, and the combustion plate The radiation efficiency of infrared rays from 5 is improved.

By the way, the combustion state in the lower side of the front surface of the combustion plate 5 and the flame holes 51 on the left and right sides tends to become unstable due to heat radiation to the surroundings and cooling with the surrounding air. In addition, CO tends to be generated at the lower side of the front surface of the combustion plate 5 and the left and right sides. Here, even if CO is generated at the lower front portion of the combustion plate 5, this CO is heated and oxidized in the process of rising along the front surface of the combustion plate 5 and converted into CO ₂ . The CO generated on the left and right sides of the front face is discharged into the room as it is.

  Therefore, in the present embodiment, as clearly shown in FIGS. 3A and 3B, the concave grooves 54 that extend straight in the vertical direction are formed on the left and right sides of the flame hole forming region on the front surface of the combustion plate 5. is doing. The concave groove 54 is formed such that its depth D2 is shallower than the depth D1 of the concave portion 53. Further, each convex portion 52 adjacent to the concave groove 54 is formed in a shape in which a part of the rhombus is cut away by the concave groove 54. A plurality of flame holes 51 are formed in the concave groove 54 at equal pitches in the vertical direction so as to be located in the middle in the vertical direction of the portion of each convex portion 52 scraped by the concave groove 54 and above and below it.

  In this embodiment, as shown in FIG. 2, the grooves 54a and 54b are also formed in the lower and upper portions of the flame hole forming region on the front surface of the combustion plate 5, but these grooves 54a and 54b are formed. May be omitted.

  According to said structure, since the part which corresponds to the concave groove 54 of each convex part 52 adjacent to the concave groove 54 is scraped off, the heat capacity of these convex parts 54 reduces. Further, since the flame holes 51 opened in the concave groove 54 are located in the middle in the vertical direction of the portion of each convex portion 51 scraped by the concave groove 54 and above and below, each convex portion 51 adjacent to the concave groove 54 is Combined with the decrease in the heat capacity, the flames 51 are efficiently heated by the flames. Therefore, even if the depth D2 of the concave groove 54 is shallower than the depth D1 of the concave portion 53, each convex portion 52 adjacent to the concave groove 54 is heated to a high temperature, and the left and right sides of the front surface of the combustion plate 5 The generation of CO from the vicinity of the part can be suppressed.

In order to confirm the above effect, the combustion plate 5 of the above embodiment in which the depth D1 of the recess 53 is 1.9 mm and the depth D2 of the recess 54 is 1.2 mm, and the combustion plate without the recess 54 are used. A test was conducted to measure the theoretical value of the CO concentration in all combustion gases. The theoretical value of the CO concentration was 0.018% in the combustion plate 5 without the concave groove 54, but decreased to 0.014% in the combustion plate 5 of the embodiment. The theoretical value is the following formula:
_{CO = COa × O 2 t ÷} (O 2 t-O 2 a)
Is calculated by Here, CO is the CO concentration in the dry combustion gas in the theoretical combustion state without excess oxygen (theoretical value), COa is the measured value of CO concentration in the dry combustion gas, and O ₂ t is in the air inlet atmosphere (dry state) O ₂ a is a measured value of oxygen concentration in the dry combustion gas.

  Thus, even if the depth D2 of the recessed groove 54 is shallower than the depth D1 of the recessed portion 53, the generation of CO from the vicinity of the left and right sides of the front surface of the combustion plate 5 can be suppressed. Can be avoided as much as possible.

Sectional drawing of the gas stove which comprises the plate type burner of embodiment of this invention. The front view which shows the combustion plate of the plate type burner of embodiment. (A) The enlarged view of the part of the circle | round | yen X of FIG. 2, (b) Sectional drawing cut | disconnected by the YY line | wire of Fig.3 (a).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Gas stove, 3 ... Plate type burner, 5 ... Combustion plate, 51 ... Flame hole, 52 ... Convex part, 53 ... Concave part, 54 ... Concave groove.

Claims (2)

A plate-type burner for a gas stove equipped with a combustion plate having a large number of flame holes and installed in a standing position on the gas stove so that the combustion plate faces the front, with a rhombus-shaped projection on the front surface of the combustion plate And a plurality of recesses surrounding the projections, and a plurality of flame holes are opened in each projection and each recess,
Concave grooves that extend straight in the vertical direction are formed on the left and right sides of the flame hole forming region on the front surface of the combustion plate, and each of the convex parts adjacent to the concave grooves is scraped off part of the rhombus by the concave grooves. Formed into a shape,
A plate-type burner for a gas stove, characterized in that a plurality of flame holes are provided in the concave groove so as to be positioned in the middle in the vertical direction of the portions of the respective convex portions cut away by the concave groove and above and below it.   The plate burner for a gas stove according to claim 1, wherein the depth of the concave groove is shallower than the depth of the concave portion.