Gas burner

Abstract

To improve the cleanability of a flame port 4, in a cooking stove that comprises a burner body and a burner cap 3 installed on the burner body, and has many flame ports 4 opened on the outer periphery of the burner cap 3.SOLUTION: A burner cap 3 is divided into a plurality of cap regions 3a in a circumferential direction. A plurality of flame ports 4 existing in each cap region 3a is composed of parallel flame ports in which air-fuel mixture jetting directions are parallel to each other, and a cleaning tool such as a brush is moved along a direction of the parallel flame ports, so that the plurality of flame ports 4 existing in each cap region 3a can be cleaned simultaneously and efficiently.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a stove burner including a burner body and a burner cap installed on the burner body, the burner cap having a number of flame ports opening on its outer peripheral surface.

Background Art

[0002] Conventionally, in this type of stove burner, the flame ports are formed such that the mixture ejection direction (the extending direction in the plan view of the flame ports) is in the radial direction passing through the annular center of the burner cap. Also, when cleaning the stove burner, the burner cap is removed from the burner body and the flame ports are cleaned with a cleaning tool such as a brush.

[0003] Conventionally, as a stove burner, there is also known one in which the burner cap is composed of a lower burner cap on the lower side and an upper burner cap on the upper side, and has a number of lower-stage flame ports opening on the outer peripheral surface between the lower burner cap and the burner body, and a number of upper-stage flame ports opening on the outer peripheral surface between the lower burner cap and the upper burner cap (see, for example, Patent Document 1). In this case, it is provided with a connecting means for connecting the lower burner cap and the upper burner cap so as not to separate them, and it is possible to prevent forgetting to install one of the lower burner cap and the upper burner cap. Also, the connecting means is configured to allow the upper burner cap to move in the vertical direction by a predetermined stroke with respect to the lower burner cap. And when cleaning, the upper burner cap is pulled away above the lower burner cap, and the upper-stage flame ports can be cleaned with a cleaning tool inserted between the two.

[0004] By the way, if the flame ports are formed such that the air-fuel mixture ejection direction is radial, when cleaning a plurality of flame ports simultaneously with a cleaning tool, the angular difference between the direction of some of the flame ports and the direction of movement of the cleaning tool becomes relatively large, resulting in poor cleanability of these flame ports. Further, in a stove burner having a lower flame port and an upper flame port, even when the upper burner cap is pulled away above the lower burner cap during maintenance, there is a limit to the gap that can be secured between the two, so the cleanability of the upper flame port does not improve much.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In view of the above points, an object of the present invention is to provide a stove burner capable of improving the cleanability of the flame ports.

Means for Solving the Problems

[0007] In order to solve the above problems, a first invention of the present application is a stove burner including a burner body and a burner cap installed on the burner body, the burner cap having a plurality of flame ports opening on an outer peripheral surface thereof. The burner cap is divided into a plurality of cap regions in the circumferential direction, and the plurality of flame ports existing in each cap region are composed of parallel flame ports in which the air-fuel mixture ejection directions are parallel to each other.

[0008] Further, the second invention of the present application is a stove burner including a burner body and a burner cap installed on the burner body, wherein the burner cap is composed of a lower burner cap at the lower side and an upper burner cap at the upper side, and has a plurality of lower flame ports opening on the outer peripheral surface between the lower burner cap and the burner body, and a plurality of upper flame ports opening on the outer peripheral surface between the lower burner cap and the upper burner cap, and is provided with connecting means for connecting the lower burner cap and the upper burner cap so as not to separate them. In this case, the burner cap is divided into a plurality of cap regions in the circumferential direction, and the plurality of upper flame ports existing in each cap region are composed of parallel flame ports whose air-fuel mixture ejection directions are parallel to each other.

[0009] According to the first invention, since the plurality of flame ports existing in each cap region are composed of parallel flame ports, when removing the burner cap from the burner body for cleaning, by moving the cleaning tool along the direction of the parallel flame ports, the plurality of flame ports existing in each cap region can be efficiently cleaned simultaneously, and the cleanability of the flame ports is improved.

[0010] Further, according to the second invention, even without separating the upper burner cap upward from the lower burner cap to secure a gap into which a cleaning tool can be inserted between the upper burner cap and the lower burner cap, for the plurality of upper flame ports composed of parallel flame ports existing in each cap region, the bristles of the brush as the cleaning tool can be simultaneously inserted from the outside along the direction of the parallel flame ports, and these upper flame ports can be efficiently cleaned simultaneously, and the cleanability of the upper flame ports is improved.

[0011] Also, it is desirable that the portion of the outer peripheral surface between the lower burner cap and the upper burner cap where the plurality of upper flame ports existing in each cap region open is formed in a planar shape perpendicular to the air-fuel mixture ejection direction from these upper flame ports. According to this, not only the upper flame ports located at the central part of each cap region but also the plurality of upper flame ports located at the parts away from the central part can be easily reached to the depth simultaneously by the bristles of the brush as the cleaning tool, and the cleanability of the upper flame ports is further improved.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0013] Referring to FIGS. 1 and 2, the stove burner according to the first embodiment of the present invention includes a burner body 2 extending upward from the downstream end of the mixing tube 1, and an annular burner cap 3 placed on the burner body 2. In addition, an ignition electrode 5 and a thermocouple 6 for flame detection are attached to the stove burner.

[0014] The burner body 2 is integral with the mixing tube 1 and is formed in a double cylindrical shape having an inner cylinder 21 and an outer cylinder 22. Inner bending flange portions 21a and 22a are formed at the upper ends of the inner cylinder 21 and the outer cylinder 22, respectively.

[0015] The burner cap 3 has a seal cylinder portion 31 that hangs down and fits into the upper end portion (inner bent flange portion 21a) of the inner cylinder 21 of the burner body 2 on the inner peripheral portion. An annular wall 32 that abuts against the upper end portion (inner bent flange portion 22a) of the outer cylinder 22 of the burner body 2 is vertically provided on the outer peripheral portion of the lower surface of the burner cap 3. A number of flame ports 4 formed by grooves that open on the outer peripheral surface of the annular wall 32, which is the outer peripheral surface of the burner cap 3, are formed on this annular wall 32, and the air-fuel mixture (mixed gas of fuel gas and primary air) supplied from the mixing pipe 1 into the burner body 2 is ejected from these flame ports 4 and burns.

[0016] In addition, in order to prevent the flame from touching the trivet claws of the trivet placed on the stove top and causing incomplete combustion, no flame ports 4 are formed in the portion of the annular wall 32 located in the same direction as the trivet claws. Further, a shield portion 33 that protrudes above the ignition electrode 5 is provided on the burner cap 3. A target portion 33a that faces the ignition electrode 5 protrudes from the lower surface of the shield portion 33.

[0017] Here, in the present embodiment, with the portion located in the same direction as the trivet claws as the boundary portion, the burner cap 3 is divided into a plurality (six in the present embodiment) of cap regions 3a in the circumferential direction, and the plurality of flame ports 4 existing in each cap region 3a are configured as parallel flame ports whose air-fuel mixture ejection directions are parallel to each other, as shown in FIG. 3. Specifically, the plurality of flame ports 4 existing in each cap region 3a are formed so as to be parallel to the line connecting the circumferential center of each cap region 3a and the annular center of the burner cap 3. The shield portion 33 protrudes from the portion of the burner cap 3 located in the same direction as a predetermined one of the trivet claws. A plurality of small ignition flame ports 4a are formed in parallel on the annular wall 32 at the same circumferential portion as the shield portion 33.

[0018] When cleaning the stove burner, the burner cap 3 is removed from the burner body 2 and turned upside down, and the flame ports 4 are cleaned with a cleaning tool such as a brush. According to the present embodiment, by moving the cleaning tool along the direction of the parallel flame ports, the plurality of flame ports 4 existing in each cap region 3a can be efficiently cleaned simultaneously. Therefore, the cleanability of the flame ports 4 is improved, and the maintenance becomes easier.

[0019] Next, the stove burner of the second embodiment of the present invention shown in FIG. 4 and below will be described. As shown in FIG. 5, the burner body 2 of this stove burner is formed in a triple cylindrical shape with an inner cylinder 21, an outer cylinder 22, and an intermediate cylinder 23. And a first mixing pipe 11 communicating with the space between the inner cylinder 21 and the intermediate cylinder 23, and a second mixing pipe 12 communicating with the space between the intermediate cylinder 23 and the outer cylinder 22 are provided. Incidentally, an outer bending flange portion 22b and a skirt portion 22c hanging down from the outer periphery of the outer bending flange portion 22b are formed at the upper end of the outer cylinder 22, and an inner bending flange portion 23a is formed at the upper end of the intermediate cylinder 23.

[0020] Further, the burner cap 3 of the stove burner of the second embodiment is composed of a lower burner cap 3L on the lower side and an upper burner cap 3U on the upper side. The lower burner cap 3L has a first seal cylinder portion 34 hanging down on the inner peripheral portion and fitting into the upper end portion (inner bending flange portion 23a) of the intermediate cylinder 23 of the burner body 2. Further, the upper burner cap 3U has a second seal cylinder portion 35 hanging down on the inner peripheral portion and fitting into the upper end portion of the inner cylinder 21 of the burner body 2.

[0021] A lower annular wall 36 that seats on the outer bending flange portion 22b at the upper end of the outer cylinder 22 of the burner body 2 is vertically provided on the outer peripheral portion of the lower surface of the lower burner cap 3L, and an upper annular wall 37 on which the upper burner cap 3U seats is erected on the outer peripheral portion of the upper surface of the lower burner cap 3L. And a large number of lower-stage flame ports 4L formed by grooves opening on the outer peripheral surface of the lower annular wall 36, that is, on the outer peripheral surface between the lower burner cap 3L and the burner body 2 are formed on the lower annular wall 36, and the air-fuel mixture supplied from the second mixing pipe 12 to the space between the intermediate cylinder 23 and the outer cylinder 22 of the burner body 2 is ejected from the lower-stage flame ports 4L and burns. Also, a large number of upper-stage flame ports 4U formed by grooves opening on the outer peripheral surface of the upper annular wall 37, that is, on the outer peripheral surface between the lower burner cap 3L and the upper burner cap 3U are formed on the upper annular wall 37, and the air-fuel mixture supplied from the first mixing pipe 11 to the space between the inner cylinder 21 and the intermediate cylinder 23 of the burner body 2 is ejected from the upper-stage flame ports 4U and burns.

[0022] Further, in order to prevent the flame formed at the upper burner port 4U from touching the trivet claws and undergoing incomplete combustion, the portion of the upper annular wall 37 located in the same orientation as the trivet claws does not form the upper burner port 4U. On the other hand, since the flame formed at the lower burner port 4L is small and has no risk of touching the trivet claws, the lower annular wall 36 also forms the lower burner port 4L at the portion located in the same orientation as the trivet claws. Further, a shade portion 33 that projects above the ignition electrode 5 is provided protruding on the outer peripheral surface of the portion of the upper annular wall 37 located in the same orientation as one of the predetermined trivet claws. Ignition of the lower burner port 4L is performed by spark discharge between the target portion 33a on the lower surface of this shade portion 33 and the ignition electrode 5. The thermocouple 6 (see FIG. 6) is arranged to detect the flame of the lower burner port 4L.

[0023] Also, in order to prevent the situation where one of the lower burner cap 3L and the upper burner cap 3U is forgotten to be installed, a connecting means 7 is provided to connect the lower burner cap 3L and the upper burner cap 3U without separating them. Referring to FIGS. 5 and 6, the connecting means 7 includes claw pieces 71 vertically provided at three locations in the same orientation as the trivet claws on the lower surface of the upper burner cap 3U, grooves 72 formed in radially inward convex portions 37a protruding at three locations in the same orientation as the trivet claws on the inner peripheral surface of the upper annular wall 37, into which each claw piece 71 is inserted, a ring member 73 held by the three claw pieces 71 so as not to fall downward, and recessed portions 74 formed on the side walls on both circumferential sides of the grooves 72 for receiving the ring member 73. In this case, when the upper burner cap 3U is lifted, the ring member 73 engages with the upper edge of the recessed portion 74, so the upper burner cap 3U does not separate from the lower burner cap 3L.

[0024] Also, when the upper burner cap 3U is placed on the lower burner cap 3L, a vertical gap is formed between the ring member 73 and the upper edge of the concave notch 74. Therefore, the upper burner cap 3U can stroke vertically by this gap amount with respect to the lower burner cap 3L. And when cleaning, it becomes possible to clean the upper flame port 4U by pulling the upper burner cap 3U away above the lower burner cap 3L and using a cleaning tool inserted between the two. However, since there is a limit to the gap that can be secured between the upper burner cap 3U and the lower burner cap 3L, the cleanability of the upper flame port 4U is not so good.

[0025] Therefore, in the second embodiment, similar to the first embodiment, with the portion located in the same orientation as the trivet claw as the boundary portion, the burner cap 3 is divided into a plurality of circumferential cap regions 3a, and a plurality of upper flame ports 4U existing in each cap region 3a are configured as parallel flame ports with the air-fuel mixture ejection directions parallel to each other, as shown in FIG. 6. Specifically, a plurality of upper flame ports 4 existing in each cap region 3a are formed so as to be parallel to a line connecting the circumferential center of each cap region 3a and the annular center of the burner cap 3. Also, among the outer peripheral surfaces of the upper annular wall 37, which is the outer peripheral surface between the lower burner cap 3L and the upper burner cap 3U, the portion where a plurality of upper flame ports 4U existing in each cap region 3a open is formed in a planar shape perpendicular to the air-fuel mixture ejection direction from these upper flame ports 4U. In addition, in the cap region 3a that matches the installation position of the thermocouple 6, upper flame ports 4U are formed only on both circumferential side portions.

[0026] According to this, even without separating the upper burner cap 3U above the lower burner cap 3L to secure a gap into which a cleaning tool can be inserted between the upper burner cap 3U and the lower burner cap 3L, for a plurality of upper-stage flame ports 4U composed of parallel flame ports existing in each cap region 3a, the bristles of the brush as a cleaning tool can be simultaneously inserted from the outside along the direction of the parallel flame ports. Therefore, these upper-stage flame ports 4U can be efficiently cleaned, and the cleanability of the upper-stage flame ports 4U is improved. Further, by forming the above-mentioned portions of each cap region 3a on the outer peripheral surface of the upper annular wall 37 in the above-mentioned planar shape, not only the upper-stage flame ports 4U located at the central portion of each cap region 3a but also a plurality of upper-stage flame ports 4U located at portions away from the central portion can be easily inserted to the depth by the bristles of the brush as a cleaning tool at the same time, and the cleanability of the upper-stage flame ports 4U is further improved.

[0027] In addition, as shown in FIG. 7, each lower-stage flame port 4L is formed such that the air-fuel mixture ejection direction is in the radial direction passing through the annular center of the burner cap 3. However, the cleaning of the lower-stage flame port 4L is performed with the lower burner cap 3L removed from the burner body 2 and turned upside down. Further, since the lower-stage flame port 4L is formed by a shallow groove and is easy to clean, the cleanability does not deteriorate. Also, among the outer peripheral surfaces of the lower annular wall 36, the portion where the lower-stage flame port 4L existing in each cap region 3a opens is formed in a planar shape similar to the upper annular wall 37, but this portion may be formed in an arc-shaped surface.

[0028] As described above, the embodiments of the present invention have been described with reference to the drawings, but the present invention is not limited thereto. For example, in the above-described second embodiment, the upper annular wall 37 forming the upper-stage flame port 4U is erected on the outer peripheral portion of the upper surface of the lower burner cap 3L, but it is also possible to vertically provide the upper annular wall 37 on the outer peripheral portion of the lower surface of the upper burner cap 3U. Further, the upper annular wall 37 may be divided into upper and lower parts, with the lower half erected on the outer peripheral portion of the upper surface of the lower burner cap 3L and the upper half vertically provided on the outer peripheral portion of the lower surface of the upper burner cap 3U.

Explanation of Reference Numerals

[0029] 2… Burner body, 3… Burner cap, 3a… Cap area, 3L… Lower burner cap, 3U… Upper burner cap, 4… Flame port, 4L… Lower flame port, 4U… Upper flame port, 7… Connecting means.

Claims

【Claim 1】 A stove burner comprising a burner body and a burner cap installed on the burner body, wherein the burner cap is composed of a lower burner cap at the lower side and an upper burner cap at the upper side, and has a plurality of lower-stage flame ports opening on the outer peripheral surface between the lower burner cap and the burner body, and a plurality of upper-stage flame ports opening on the outer peripheral surface between the lower burner cap and the upper burner cap, and is provided with connecting means for connecting the lower burner cap and the upper burner cap so as not to separate them. The burner cap is divided into a plurality of cap regions in the circumferential direction, and the plurality of upper-stage flame ports existing in each cap region are composed of parallel flame ports with the mixture ejection directions parallel to each other. A stove burner, wherein a portion of the outer peripheral surface between the lower burner cap and the upper burner cap where the plurality of upper-stage flame ports existing in each cap region open is formed in a planar shape perpendicular to the mixture ejection direction from these upper-stage flame ports.

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