阅读说明：本技术 炉灶用燃烧器及燃气灶 (Burner for stove and gas stove ) 是由 浅井一浩 柴山总一郎 于 2021-03-12 设计创作，主要内容包括：本发明提供炉灶用燃烧器及燃气灶,该炉灶用燃烧器具备载放于燃烧器主体(2)上的燃烧器罩(3),其中,在下垂设置于燃烧器罩(3)的下表面外周部的环状壁(31),以存在周向间隔的方式形成有多个从环状壁(31)的下端向上方凹入的成为火焰口(4)的火焰口槽(32),由此能够使火焰口(4)处的混合气体的流量分布在火焰口上部增多。环状壁(31)的内周面形成为趋向上方而缩径的锥状。另外,火焰口槽(32)的周向宽度趋向环状壁(31)的径向内侧而增大。并且,从环状壁(31)的径向内侧观察在环状壁(31)的内周面开口的火焰口槽(32)的入口部(32a)所得的形状形成为上底大于下底的梯形。(The invention provides a burner for a stove and a gas stove, the burner for the stove is provided with a burner cover (3) arranged on a burner main body (2), wherein, a plurality of flame opening grooves (32) which become flame openings (4) and are recessed upwards from the lower end of an annular wall (31) are formed on the annular wall (31) which is arranged on the periphery of the lower surface of the burner cover (3) in a downward hanging way in a mode of circumferential intervals, thereby the flow distribution of mixed gas at the flame openings (4) can be increased on the upper part of the flame openings. The inner peripheral surface of the annular wall (31) is formed in a tapered shape with a diameter decreasing upward. Further, the circumferential width of the flame port groove (32) increases toward the radially inner side of the annular wall (31). The shape of the inlet portion (32a) of the flame port groove (32) that is open on the inner peripheral surface of the annular wall (31) when viewed from the radially inner side of the annular wall (31) is a trapezoid having an upper base larger than a lower base.)

1. A burner for a range, comprising: a burner main body to which a mixed gas is supplied; and a burner cover which is mounted on the burner main body and has a flame port opened on the outer peripheral surface,

the burner for a cooking range is characterized in that,

an annular wall is provided at the outer peripheral portion of the lower surface of the burner cover in a downward-hanging manner, a plurality of flame port grooves serving as flame ports are formed at the annular wall at intervals in the circumferential direction, the flame port grooves being recessed upward from the lower end of the annular wall,

the inner peripheral surface of the annular wall is formed into a tapered shape with a diameter decreasing upward, the circumferential width of each flame port groove gradually increases toward the radial inner side of the annular wall, and the shape of the inlet portion of each flame port groove, which is opened in the inner peripheral surface of the annular wall when viewed from the radial inner side of the annular wall, is a trapezoid with an upper bottom larger than a lower bottom.

2. A burner for a range, comprising: a burner main body to which a mixed gas is supplied; and a burner cover which is placed on the burner body and has upper and lower flame ports opened on the outer peripheral surface, wherein the burner cover comprises an annular lower cover member and an annular upper cover member, the lower flame port is formed between the burner body and the lower cover member, the upper flame port is formed between the lower cover member and the upper cover member,

the burner for a cooking range is characterized in that,

a first annular wall is vertically arranged on the outer periphery of the upper surface of the lower side cover component, a second annular wall which is positioned on the first annular wall is vertically arranged on the outer periphery of the lower surface of the upper side cover component,

the upper flame hole is divided into an upper flame hole part and a lower flame hole part, a plurality of first flame hole grooves which are recessed downwards from the upper end of the first annular wall and become the lower flame hole part are formed on the first annular wall in a mode of having a circumferential interval, a plurality of second flame hole grooves which are recessed upwards from the lower end of the second annular wall and become the upper flame hole part are formed on the second annular wall in a mode of having a circumferential interval and being staggered in the circumferential direction relative to the first flame hole grooves,

the inner peripheral surface of the second annular wall is tapered so as to decrease in diameter upward, the circumferential width of each second flame port groove gradually increases toward the radially inner side of the second annular wall, and the shape of the inlet portion of each second flame port groove, which is open at the inner peripheral surface of the second annular wall when viewed from the radially inner side of the second annular wall, is a trapezoid having an upper base larger than a lower base.

3. A gas stove is characterized in that a gas stove body is provided with a gas inlet and a gas outlet,

a burner for a range according to claim 1 or 2 is mounted.

Technical Field

The present invention relates to a burner for a range and a gas range, the burner for the range comprises: a burner main body to which a mixed gas is supplied; and a burner cover which is mounted on the burner main body and has a flame port opened on the outer peripheral surface.

Background

Conventionally, as such a burner for a range, there is known a burner having the following structure: an annular wall is provided so as to hang down from the outer periphery of the lower surface of the burner cover, and a plurality of flame port grooves serving as flame ports are formed in the annular wall so as to be recessed upward from the lower end of the annular wall at intervals in the circumferential direction (see, for example, patent document 1).

As a burner for a range, a burner for a range including a burner cover having two stages of upper and lower flame ports opened on an outer peripheral surface is known. The burner cover comprises an annular lower cover component and an annular upper cover component, wherein a lower flame port is formed between the burner body and the lower cover component in a partitioned mode, and an upper flame port is formed between the lower cover component and the upper cover component in a partitioned mode. It is also known that: in this burner for a range, a first annular wall is vertically provided on an outer peripheral portion of an upper surface of a lower cover member, a second annular wall is provided on an outer peripheral portion of a lower surface of the upper cover member so as to be suspended from the first annular wall, an upper flame port is divided into upper and lower portions of an upper flame port portion and a lower flame port portion, a plurality of first flame port grooves serving as lower flame port portions recessed downward from an upper end of the first annular wall are formed in the first annular wall at circumferential intervals, and a plurality of second flame port grooves serving as upper flame port portions recessed upward from a lower end of the second annular wall are formed in the second annular wall at circumferential intervals and shifted in a circumferential direction from the first flame port grooves (see, for example, patent document 2).

In the case where the flame hole groove recessed upward from the lower end of the annular wall is formed as described above, the shape of the flame hole groove as viewed from the radially inner side of the annular wall is a trapezoid having a mold release gradient for releasing the mold for the flame hole groove downward, that is, a trapezoid having a lower bottom slightly larger than an upper bottom.

Here, in order to improve the heating efficiency of the cooking container as the object to be heated positioned above the burner for the range, it is desirable to increase the flow rate distribution of the mixed gas at the flame ports in the upper part of the flame ports so that the amount of heat generated by the flame formed by the combustion of the mixed gas jetted from the flame ports in the upper part is increased. However, in the burner for a range of the above conventional example, the flame hole groove has a mold release gradient for releasing the mold downward, and thus such a demand cannot be achieved.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-214963

Patent document 2: japanese patent laid-open publication No. 2019-143959

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a range burner capable of increasing the flow rate distribution of the mixture gas at the flame ports above the flame ports, and a gas range having the range burner mounted thereon.

In order to solve the above problem, a first aspect of the present invention is a burner for a range, comprising: a burner main body to which a mixed gas is supplied; and a burner cover which is placed on the burner body and has flame ports opened on an outer peripheral surface, wherein an annular wall is provided so as to hang down from an outer peripheral portion of a lower surface of the burner cover, a plurality of flame port grooves which are recessed upward from a lower end of the annular wall and serve as flame ports are formed on the annular wall so as to be spaced in a circumferential direction, an inner peripheral surface of the annular wall is formed in a tapered shape which is tapered upward, a circumferential width of each flame port groove gradually increases toward a radially inner side of the annular wall, and a shape obtained by observing an inlet portion of each flame port groove opened on the inner peripheral surface of the annular wall from the radially inner side of the annular wall is a trapezoid having an upper bottom larger than a lower bottom.

In addition, a second aspect of the present invention is a burner for a range, including: a burner main body to which a mixed gas is supplied; and a burner cover which is placed on the burner body and has upper and lower flame ports opened on an outer peripheral surface, wherein the burner cover includes an annular lower cover member and an annular upper cover member, a lower flame port is defined between the burner body and the lower cover member, and an upper flame port is defined between the lower cover member and the upper cover member, the burner for the cooking stove is characterized in that a first annular wall is vertically provided on an outer peripheral portion of an upper surface of the lower cover member, a second annular wall which is located on the first annular wall is provided on an outer peripheral portion of a lower surface of the upper cover member in a downward hanging manner, the upper flame port is divided into upper and lower portions of an upper flame port portion and a lower flame port portion, and a plurality of first flame port grooves which are recessed downward from an upper end of the first annular wall to form the lower flame port portion are formed on the first annular wall at intervals in a circumferential direction, the second annular wall is formed with a plurality of second flame port grooves which are recessed upward from the lower end of the second annular wall and serve as upper flame port portions, the second flame port grooves being circumferentially offset from the first flame port grooves at circumferential intervals, the inner circumferential surface of the second annular wall is formed in a tapered shape which is tapered upward and has a diameter reduced, the circumferential width of each second flame port groove gradually increases toward the radially inner side of the second annular wall, and the shape of the inlet portion of each second flame port groove which is open in the inner circumferential surface of the second annular wall when viewed from the radially inner side of the second annular wall is a trapezoid having an upper base larger than a lower base.

A third aspect of the present invention is a gas range including the range burner of the first aspect or the range burner of the second aspect.

According to the present invention (first and second inventions), since the width of the upper portion of the inlet portion of the flame port groove (second flame port groove in the second invention) is larger than the width of the lower portion, the mixed gas easily flows into the upper portion of the inlet portion. As a result, the flow rate distribution of the mixed gas at the flame ports (the upper flame port portion in the second invention) is increased at the upper portion of the flame ports. Therefore, the amount of heat generated in the upper part of the flame generated by the combustion of the mixed gas ejected from the flame ports (the upper flame port portion in the second invention) is increased, and the heating efficiency of the cooking container is improved.

Further, by forming the inner peripheral surface of the annular wall (second annular wall in the second invention) in a tapered shape having a diameter decreasing upward and gradually increasing the circumferential width of each flame port groove (second flame port groove in the second invention) toward the radially inner side of the annular wall (second annular wall in the second invention), even if the flame port groove (second flame port groove in the second invention) has a mold release gradient for releasing the molding die downward, the shape of the inlet portion of the flame port groove (second flame port groove in the second invention) viewed from the radially inner side of the annular wall (second annular wall in the second invention) can be formed in a trapezoidal shape having an upper bottom larger than a lower bottom.

Drawings

Fig. 1 is a perspective view of a main part of a gas range on which a burner for a range according to a first embodiment of the present invention is mounted.

Fig. 2 is a sectional view taken along line II-II in fig. 1.

Fig. 3 is a perspective view of a burner for a range of the first embodiment.

Fig. 4(a) is an enlarged sectional side view of a main part of a burner for a range according to the first embodiment, fig. 4(b) is a sectional view taken along the line IVb-IVb in fig. 4(a), and fig. 4(c) is a sectional view taken along the line IVc-IVc in fig. 4 (a).

Fig. 5 is a sectional view corresponding to fig. 2 of a gas range on which a burner for a range according to a second embodiment of the present invention is mounted.

Fig. 6(a) is an enlarged sectional side view of a main part of a range burner of the second embodiment, fig. 6(b) is a sectional view taken along the line VIb-VIb in fig. 6(a), and fig. 6(c) is a sectional view taken along the line VIc-VIc in fig. 6 (a).

Description of the reference numerals

Burner for 1 … stove, burner main body 2 …, burner cover 3 …, lower cover member 3L …, upper cover member 3U …, annular wall 31 …, and annular wall 31₁… first annular wall, 31₂… second annular wall, 32 … flame port groove, 32a … flame port groove entrance portion, 32₁… first flame notch groove, 32₂… second flame opening groove, 32₂a … inlet part of the second flame port groove, 4 … flame port, 4L … lower flame port, 4U … upper flame port, 4Ua … upper flame port part, 4Ub … lower flame port part.

Detailed Description

Referring to fig. 1 and 2, TP is a top plate covering an upper surface of a range body of an unillustrated gas range. In a gas range, a range burner 1 for heating a cooking vessel such as a pot of a hob G placed on a top plate TP is mounted so as to face a burner opening TPa opened in the top plate TP.

Referring again to fig. 3, the range burner 1 includes: a burner body 2 to which the mixed gas is supplied, the burner body 2 having an upper portion protruding to the ceiling plate TP through a burner opening TPa of the ceiling plate TP; and a burner cover 3 mounted on the burner body 2. A plurality of flame ports 4U and 4L are provided in two stages in the circumferential direction at intervals on the outer circumferential surface of the burner cover 3. Further, only the lower flame ports 4L are formed in portions of a plurality of locations in the circumferential direction of the burner cover 3, which are located in the same orientation as the plurality of burner claws Ga of the burner block G, and the upper flame ports 4U are not formed, so that incomplete combustion due to contact of flames with the burner claws Ga is prevented.

More specifically, the burner body 2 has an inner and outer triple tube including an outer tube 21, an inner tube 22, and an intermediate tube 23. The combustor cover 3 is configured to include: an annular lower cover member 3L having a tube portion 3La, which is provided with a central tube 23 of the burner main body 2 and is suspended from the inner circumferential portion thereof; and an annular upper cover member 3U having a tube portion 3Ua that is provided with an inner circumferential portion thereof and is fitted into the inner tube 22 of the burner main body 2 in a hanging manner. A lower flame port 4L is defined between the outer cylinder 21 of the burner body 2 and the lower cover member 3L, and an upper flame port 4U is defined between the lower cover member 3L and the upper cover member 3U.

The upper flame ports 4U are divided into upper and lower portions of upper flame port portions 4Ua and lower flame port portions 4 Ub. Specifically, the first annular wall 31 is erected on the outer peripheral portion of the upper surface of the lower cover member 3L₁Under the upper cover member 3UThe surface outer periphery is provided with a first annular wall 31₁Second annular wall 31₂. And, in the first annular wall 31₁A plurality of secondary first annular walls 31 are formed at intervals in the circumferential direction₁A first flame hole groove 32 which is a lower flame hole part 4Ub of the upper flame hole 4U and the upper end of which is recessed downward₁. In addition, in the second annular wall 31₂So as to have a circumferential spacing and relative to the first flame port groove 32₁A plurality of secondary annular walls 31 are formed so as to be offset in the circumferential direction₂A second flame hole groove 32 which is formed as an upper flame hole portion 4Ua of the upper flame hole 4U and whose lower end is recessed upward₂. Thereby, the upper flame port portion 4Ua and the lower flame port portion 4Ub are arranged in a staggered manner in the circumferential direction.

A third annular wall 31 is provided so as to hang down from the outer peripheral portion of the lower surface of the lower cover member 3L and is located at the upper end of the outer cylinder 21 of the burner main body 2₃. In the third annular wall 31₃A plurality of secondary annular walls 31 are formed at intervals in the circumferential direction₃The lower end of the lower flame port 4L is recessed upward.

Further, the range burner 1 is provided with an ignition electrode 11 and a thermocouple 12 as a flame monitoring element. A target portion 33 (see fig. 3) facing the ignition electrode 11 is provided to protrude from 1 portion in the circumferential direction of the lower cover member 3L. Then, the lower flame ports 4L are ignited by spark discharge between the ignition electrode 11 and the target portion 33. Moreover, a brim 34 for preventing boiling spills from falling down to the ignition electrode 11 is provided so as to protrude from the upper cover member 3U at 1 position in the circumferential direction that coincides with the installation portion of the ignition electrode 11. Further, a cover 13 covering the burner opening TPa from above is inserted outside the burner body 2 to prevent boiling spills from falling through a gap between the burner opening TPa and the range burner 1.

Further, the burner 1 for a range includes: a first mixing pipe 5U for the upper flame ports 4U, which communicates with a space between the inner cylinder 22 and the intermediate cylinder 23 of the burner main body 2; and a second mixing pipe 5L for the lower flame ports 4L, which communicates with a space between the outer cylinder 21 and the intermediate cylinder 23 of the burner main body 2. The fuel gas is supplied to the first mixing pipe 5U via a first branch 6U branched from the common gas supply passage 6. The fuel gas is supplied to the second mixing pipe 5L via a second branch 6L branched from the gas supply path 6. Then, the fuel gas and the primary air sucked into the mixing pipes 5U and 5L are mixed in the first mixing pipe 5U and the second mixing pipe 5L. The mixed gas from the first mixing pipe 5U is ejected from the upper flame ports 4U through the space between the inner cylinder 22 and the intermediate cylinder 23 of the burner main body 2 and the space between the lower cover member 3L and the upper cover member 3U. The mixed gas from the second mixing pipe 5L is ejected from the lower flame ports 4L through the space between the outer cylinder 21 and the intermediate cylinder 23 of the burner main body 2 and the space between the outer cylinder 21 and the lower cover member 3L.

The gas supply path 6 is provided with: an electromagnetic safety valve 61 that is forcibly opened at the time of ignition and is closed when a misfire is detected due to a decrease in electromotive force of the thermocouple 12; and a source valve 62 that is open at ignition and closed at extinction. The first branch passage 6U and the second branch passage 6L are provided with a first flow rate adjustment valve 63U and a second flow rate adjustment valve 63L, respectively, which are operated by an operation member including a lever and a knob for adjusting heating power, not shown, so that the opening degree is changed. The operating member is operable from a low fire position to a high fire position. If the operating member is operated from the low fire position to the high fire position, the opening degree of the second flow rate adjustment valve 63L is gradually increased from the minimum opening degree. On the other hand, the first flow rate adjustment valve 63U is not opened until the operating member reaches the predetermined intermediate position, and is suddenly opened to the predetermined opening degree immediately after the operating member has exceeded the intermediate position, and the opening degree is gradually increased by the subsequent operation to the strong fire position. When the operating member is operated from the low flame position to the intermediate position, the mixed gas is supplied to the upper flame ports 4U, and the flames move from the lower flame ports 4L to the upper flame ports 4U.

Here, in the present embodiment, as shown in fig. 4(a), the second annular wall 31₂The inner peripheral surface of the cylindrical member is formed in a tapered shape with a diameter decreasing upward. Further, as shown in FIG. 4(b), each second flameMouth groove 32₂Towards the second annular wall 31₂Becomes gradually larger at the radially inner side. Specifically, the second annular wall 31₂Is set to, for example, 40 deg., and the second annular wall 31₂Each second flame port groove 32 facing radially inward₂The widening angle θ b of the circumferential width of (a) is set to, for example, 10 °. Then, as shown in FIG. 4(c), the second annular wall 31 is formed₂Is viewed radially inwards of the second annular wall 31₂Second flame port grooves 32 having an opening on the inner peripheral surface thereof₂Inlet portion 32 of₂The shape of a is a trapezoid with an upper base larger than a lower base. In fig. 4(c), the second flame port groove 32 is illustrated for easy understanding₂Inlet portion 32 of₂a denotes the grid lines.

Accordingly, the second burner port groove 32₂Inlet portion 32 of₂a has a width of the upper portion larger than that of the lower portion, so that the mixed gas is easily introduced into the inlet portion 32₂The upper part of a flows in. As a result, the flow rate distribution of the mixed gas at the upper flame hole portion 4Ua is increased at the upper portion. Therefore, the amount of heat generated from the flame formed by the combustion of the mixed gas jetted from the upper flame port portion 4Ua is increased in the upper portion, and the heating efficiency of the cooking container is improved.

However, in the second flame port groove 32₂The mold is demolded downward with a mold release gradient of about 1 ° widening downward. However, by the second annular wall 31₂The inner peripheral surface of the flame hole groove 32 is formed in the tapered shape₂Is increased toward the radially inner side even at the second flame port groove 32₂The second flame hole groove 32 can be formed with the above-described mold release gradient as viewed from the radially inner side₂Inlet portion 32 of₂a is formed in a trapezoidal shape having an upper base larger than a lower base.

In addition, in the present embodiment, the second flame port groove 32 is made₂The upper bottom surface of (2) is inclined upward toward the radially outer side. This is to improve the heating efficiency of the cooking container by facilitating the upward rise of the flame in the upper flame hole portion 4 Ua. However, it is not necessary that the second flame port groove 32₂Is inclined in the above-described manner.

Although the burner 1 for a range in which the flame ports 4U and 4L are provided in two stages in the upper and lower direction on the outer peripheral surface of the burner cover 3 has been described above, the present invention can be similarly applied to a burner for a range in which the flame ports are provided in 1 stage in the upper and lower direction on the outer peripheral surface of the burner cover. Such a burner for a range will be described below with reference to fig. 5.

A burner 1 for a range according to a second embodiment shown in fig. 5 includes: a burner body 2 to which the mixed gas is supplied, the upper portion of the burner body 2 protruding on the top plate TP through a burner opening TPa of the top plate TP; and a burner cover 3 mounted on the burner body 2. The burner main body 2 has an outer cylinder 21 and an inner cylinder 22, which are double-walled cylinders. The burner cover 3 is annular and has a cylindrical portion 3a that is fitted into the inner cylindrical body 22 of the burner main body 2 and that is provided so as to hang down on the inner circumferential portion. An annular wall 31 is provided so as to hang down from the outer peripheral portion of the lower surface of the burner cover 3 and is located at the upper end of the outer cylinder 21 of the burner main body 2. A plurality of flame port grooves 32 serving as flame ports 4 are formed in the annular wall 31 so as to be recessed upward from the lower end of the annular wall 31 at intervals in the circumferential direction.

Here, as shown in fig. 6(a), the inner peripheral surface of the annular wall 31 is formed in a tapered shape having a diameter decreasing upward, and as shown in fig. 6(b), the circumferential width of each of the burner grooves 32 gradually increases toward the radially inner side of the annular wall 31. The taper angle θ a of the inner peripheral surface of the annular wall 31 is set to, for example, 40 ° as in the range burner 1 of the first embodiment, and the widening angle θ b of the circumferential width of each port groove 32 facing radially inward of the annular wall 31 is set to, for example, 10 ° as in the range burner 1 of the first embodiment. As shown in fig. 6(c), the inlet portion 32a of each flame port groove 32, which is open on the inner circumferential surface of the annular wall 31 as viewed from the radially inner side of the annular wall 31, has a trapezoidal shape with an upper base larger than a lower base.

Accordingly, the mixture gas easily flows into the upper portion of the inlet portion 32a of the flame port groove 32, as in the burner 1 for a range of the first embodiment. As a result, the flow rate distribution of the mixed gas at the flame ports 4 is increased at the upper portion. Therefore, the amount of heat generated from the flame formed by the combustion of the mixed gas ejected from the flame ports 4 is increased in the upper portion, and the heating efficiency of the cooking container is improved. Further, by forming the inner peripheral surface of the annular wall 31 in the tapered shape and increasing the circumferential width of each of the flame port grooves 32 toward the radially inner side, even if the flame port grooves 32 have a mold release gradient for releasing the molding die downward, the shape of the inlet portion 32a of the flame port groove 32 viewed from the radially inner side can be formed in a trapezoidal shape having an upper bottom larger than a lower bottom.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited thereto. For example, in the first embodiment, the mixed gas is supplied from the first mixing pipe 5U and the second mixing pipe 5L to the upper flame ports 4U and the lower flame ports 4L, respectively, but the mixed gas may be supplied from a common mixing pipe to the upper flame ports 4U and the lower flame ports 4L.