JP2018042633A - Gas rice cooker - Google Patents

Gas rice cooker Download PDF

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JP2018042633A
JP2018042633A JP2016178142A JP2016178142A JP2018042633A JP 2018042633 A JP2018042633 A JP 2018042633A JP 2016178142 A JP2016178142 A JP 2016178142A JP 2016178142 A JP2016178142 A JP 2016178142A JP 2018042633 A JP2018042633 A JP 2018042633A
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secondary air
rice cooker
restriction plate
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burner head
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JP6814576B2 (en
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敦史 滝本
Atsushi Takimoto
敦史 滝本
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Rinnai Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a gas rice cooker which can evenly heat an entire lower surface of a pot bottom of a rice cooking pot with a large diameter without using a gas burner of a burner head with a large diameter that corresponds to a diameter of the pot bottom of the rice cooking pot to enable rice cooking of uniform and good-quality cooking.SOLUTION: In a gas rice cooker equipped with a gas burner (2) having an annular burner head (21) in which a plurality of outward flame holes (20) are arranged on an outer peripheral edge below a rice cooking pot (3), a second annular air restricting plate (1) is provided below the burner head (21), and the second air restricting plate (1) is separated from a lower surface of the burner head (21) so that air passages (11) (12) are respectively formed on an upper surface side and a lower surface side of the second air restricting plate (1). An outer peripheral edge (1b) of the second air restricting plate (1) is positioned outside the flame holes (20).SELECTED DRAWING: Figure 1

Description

本発明は、ガス炊飯器、特に、炊飯釜の釜底をガスバーナの火炎で加熱するガス炊飯器に関する。   The present invention relates to a gas rice cooker, and more particularly to a gas rice cooker that heats the bottom of a rice cooker with a flame of a gas burner.

炊飯釜の釜底全体をむらなく加熱できるバーナとして、複数の長尺状のバーナプレートを放射状に配置させた構成の燃焼バーナが提案されている(特許文献1参照)。このものでは、各バーナプレートの周囲に二次空気口を設け、バーナプレートの放射方向外側縁が、炊飯釜の釜底の周縁に対向するように設置することにより、バーナプレートからの火炎を炊飯釜の底部だけでなく周側面にも到達させている。   A combustion burner having a configuration in which a plurality of elongated burner plates are arranged radially is proposed as a burner that can uniformly heat the entire bottom of a rice cooker (see Patent Document 1). In this, a secondary air port is provided around each burner plate, and the flame from the burner plate is cooked by installing the burner plate so that the radially outer edge of the burner plate faces the peripheral edge of the bottom of the rice cooker. Not only the bottom of the hook but also the peripheral side.

特開2006−145104号公報JP 2006-145104 A

しかしながら、上記構成の燃焼バーナでは、例えば、業務用の炊飯器のように、釜底の径が大きな炊飯釜を加熱するためには、より長いバーナプレートを放射状に配置させた大径の燃焼バーナを用いる必要があり、コストアップの要因となる上に、生産性が悪いという問題がある。   However, in the combustion burner configured as described above, for example, a large-sized combustion burner in which longer burner plates are radially arranged to heat a rice cooker having a large pot bottom diameter, such as a commercial rice cooker. As a result, there is a problem that productivity is poor.

一方、従来から、外周縁に外向き炎孔が配設された環状のバーナヘッドを有するガスバーナを用いたガス炊飯器があり、このようなガス炊飯器でも、大きな炊飯釜を加熱するためには、炊飯釜の径に合わせてバーナヘッドの径も大きくしなければならず、コストアップとなる。また、釜底の周縁にまで火炎が到達可能な大きなバーナヘッドとすると、釜底の中央部が加熱されにくくなって、均一な加熱が望めないといった問題がある。   On the other hand, conventionally, there is a gas rice cooker using a gas burner having an annular burner head with an outward flame hole disposed on the outer peripheral edge, and even in such a gas rice cooker, to heat a large rice cooker In addition, the diameter of the burner head must be increased in accordance with the diameter of the rice cooker, which increases the cost. In addition, when a large burner head that can reach a flame to the periphery of the bottom of the pot is used, there is a problem that the central portion of the bottom of the pot becomes difficult to be heated and uniform heating cannot be expected.

本発明は、上記問題点に鑑みてなされたものであり、小径のバーナで、大径の炊飯釜の釜底下面全体を均一に加熱でき、むらのない良質な炊き上がりの炊飯を可能としたガス炊飯器を提供することを課題とする。   The present invention has been made in view of the above problems, and with a small-diameter burner, the entire bottom bottom surface of a large-diameter rice cooker can be heated uniformly, enabling high-quality cooked rice without unevenness. It is an object to provide a gas cooker.

上記目的を達成するために講じた本発明は、炊飯釜の下方に設置され且つ外周縁に複数の外向き炎孔が配設された環状のバーナヘッドを有するガスバーナを備えたガス炊飯器において、
前記バーナヘッドの下方に、環状の二次空気制限板を有し、
前記二次空気制限板は、前記二次空気制限板の上面側及び下面側にそれぞれ空気通路が形成されるように前記バーナヘッドの下面と離間して設けられていると共に、前記二次空気制限板の外周縁が前記外向き炎孔よりも外側に位置するように設けられているガス炊飯器である。
The present invention taken to achieve the above object is a gas rice cooker equipped with a gas burner having an annular burner head installed below the rice cooker and provided with a plurality of outward flame holes on the outer periphery.
An annular secondary air restriction plate is provided below the burner head,
The secondary air restriction plate is provided apart from the lower surface of the burner head so that air passages are formed on the upper surface side and the lower surface side of the secondary air restriction plate, respectively, and the secondary air restriction plate It is a gas rice cooker provided so that the outer periphery of a board may be located outside the said outward flame hole.

上記技術的手段は次のように作用する。
炊飯時には、環状のバーナヘッドの外周縁に配設された外向き炎孔に形成される火炎によって炊飯釜の釜底下面が加熱される。このバーナヘッドの下方には、バーナヘッドの下面と離間して二次空気制限板が設けられているから、二次空気制限板の上下両面側にはそれぞれ、外側に向かって空気が流れる2つの空気通路が形成される。
これにより、バーナヘッドの下方から、二次空気として外向き炎孔に向かって送られる外部の空気(フレッシュエアー)は、バーナヘッドの下方に設けられている二次空気制限板によって前記2つの空気通路に分かれて流れて行くこととなり、二次空気制限板の上面側の空気通路を流れ、外向き炎孔に直接送られる第1のフレッシュエアーの流量は、二次空気制限板によって制限されることから、二次空気制限板が設けられていない場合よりも減少し、空気不足状態となる。一方、二次空気制限板の外周縁は外向き炎孔よりも外側に位置するから、二次空気制限板の下面側の空気流路を流れる第2のフレッシュエアーは、前記外向き炎孔よりも外側へ向かって流れていく。そのため、外向き炎孔に形成された火炎は、不足する二次空気を求めて二次空気制限板の外周縁よりも外側を流れる第2のフレッシュエアーへ向かって延びる。これにより、二次空気制限板が設けられていない場合よりも外側へ長く延びた火炎を形成することができ、小径のバーナヘッドで、大径の炊飯釜の釜底の周縁を加熱することができる。
The technical means operates as follows.
At the time of rice cooking, the bottom bottom surface of the rice cooking pot is heated by a flame formed in an outward flame hole disposed on the outer peripheral edge of the annular burner head. Since the secondary air restriction plate is provided below the burner head so as to be separated from the lower surface of the burner head, the upper and lower surfaces of the secondary air restriction plate each have two air flows toward the outside. An air passage is formed.
As a result, external air (fresh air) sent from the lower side of the burner head toward the outward flame hole as secondary air is supplied to the two air by the secondary air restriction plate provided below the burner head. The flow of the first fresh air that flows through the air passage on the upper surface side of the secondary air restriction plate and is directly sent to the outward flame hole is restricted by the secondary air restriction plate. For this reason, it becomes smaller than when the secondary air restriction plate is not provided, resulting in an air shortage state. On the other hand, since the outer peripheral edge of the secondary air restriction plate is located outside the outward flame hole, the second fresh air flowing through the air flow path on the lower surface side of the secondary air restriction plate is more than the outward flame hole. Also flows outward. For this reason, the flame formed in the outward flame hole extends toward the second fresh air that flows outside the outer peripheral edge of the secondary air restricting plate in search of the deficient secondary air. Thereby, it is possible to form a flame that extends longer than the case where the secondary air restriction plate is not provided, and with the small-diameter burner head, the peripheral edge of the large-diameter rice cooker can be heated. it can.

好ましくは、上記ガス炊飯器は、前記二次空気制限板の下方に、中央孔を有する環状の汁受け皿を有し、
前記二次空気制限板の外周縁は、前記汁受け皿の中央孔よりも外側に位置するように設けられる。
このものでは、ガスバーナの下方から送られてくるフレッシュエアーは汁受け皿で堰き止められ、二次空気制限板の外周縁よりも内側に位置する汁受け皿の中央孔を通って上方に流れる。バーナヘッドと汁受け皿との間に設けられている二次空気制限板の外周縁は外向き炎孔よりも外側に位置すると共に、汁受け皿の中央孔よりも外側に位置するから、中央孔を通ったフレッシュエアーは、直接、外向き炎孔に向かって流れず、二次空気制限板の上下両面側に形成される空気通路を流れる。これにより、二次空気制限板の下面側の空気通路を流れる第2のフレッシュエアーを外向き炎孔よりも外側に導くことができるから、外向き炎孔に形成される火炎を確実に二次空気制限板の外周縁に向かって延ばすことができる。
Preferably, the gas rice cooker has an annular juice tray having a central hole below the secondary air restriction plate,
An outer peripheral edge of the secondary air restriction plate is provided so as to be located outside a central hole of the juice receiving tray.
In this case, fresh air sent from below the gas burner is blocked by the soup pan and flows upward through the central hole of the soup pan located inside the outer peripheral edge of the secondary air restriction plate. The outer peripheral edge of the secondary air restriction plate provided between the burner head and the juice receiving tray is located outside the outward flame hole and outside the central hole of the juice receiving tray. The fresh air that has passed does not flow directly toward the outward flame hole, but flows through the air passages formed on the upper and lower surfaces of the secondary air restriction plate. Accordingly, the second fresh air flowing through the air passage on the lower surface side of the secondary air restriction plate can be guided to the outside of the outward flame hole, so that the flame formed in the outward flame hole is surely secondary. It can extend toward the outer periphery of the air restriction plate.

好ましくは、上記ガス炊飯器において、前記バーナヘッドの下面は、外側に向かって上昇するテーパ面で形成されており、
前記二次空気制限板は、前記バーナヘッドの下面のテーパ面と略同一のテーパ角度を有するテーパ状に設けられる。
このものでは、外向き炎孔に形成される火炎は、二次空気制限板の上面側の空気通路を流れてくる第1のフレッシュエアーによって、斜め上方に向かって形成され、この火炎は、二次空気制限板の下面側の空気通路を流れてくる第2のフレッシュエアーを求め、炊飯釜の釜底の周縁に向かってさらに斜め上方へ延びる。これにより、炊飯釜の釜底全体を火炎及びその燃焼排気で一層確実に加熱することができる。
Preferably, in the gas cooker, the lower surface of the burner head is formed with a tapered surface that rises outward.
The secondary air restriction plate is provided in a tapered shape having a taper angle substantially the same as the tapered surface of the lower surface of the burner head.
In this case, the flame formed in the outward flame hole is formed obliquely upward by the first fresh air flowing through the air passage on the upper surface side of the secondary air restriction plate. The second fresh air flowing through the air passage on the lower surface side of the next air restriction plate is obtained, and extends obliquely upward toward the peripheral edge of the bottom of the rice cooker. As a result, the entire bottom of the rice cooker can be more reliably heated by the flame and its combustion exhaust.

好ましくは、上記ガス炊飯器において、前記二次空気制限板は、前記バーナヘッドの下面と前記二次空気制限板の上面との間の最短距離が、前記二次空気制限板の下面と前記汁受け皿の上面との間の最短距離よりも小さくなるように設けられる。
このものでは、二次空気制限板の下面側の空気通路を流れる第2のフレッシュエアーの流量を、二次空気制限板の上面側の空気通路を流れる第1のフレッシュエアーのそれよりも多くすることができる。これにより、外向き炎孔に形成される二次空気不足の火炎は、二次空気制限板の外周縁の外側に向かって流れる二次空気を求めてより長く延び、さらに長い火炎を形成することができる。
Preferably, in the gas cooker, the secondary air restriction plate has a shortest distance between the lower surface of the burner head and the upper surface of the secondary air restriction plate, and the lower surface of the secondary air restriction plate and the juice. It is provided so that it may become smaller than the shortest distance between the upper surfaces of a saucer.
In this case, the flow rate of the second fresh air flowing through the air passage on the lower surface side of the secondary air restriction plate is made larger than that of the first fresh air flowing through the air passage on the upper surface side of the secondary air restriction plate. be able to. As a result, the secondary air-deficient flame formed in the outward flame hole extends longer for the secondary air flowing toward the outside of the outer peripheral edge of the secondary air restriction plate, and forms a longer flame. Can do.

さらに好ましくは、上記ガス炊飯器において、前記バーナヘッドの上面に、内方に向かって火炎が噴出する内向き炎孔が配設される。
バーナヘッドの外周縁に形成されている外向き炎孔からは外方に向かって火炎が噴出するため、炊飯釜の釜底の中央部が加熱されにくいが、このものでは、内方に向かって火炎が噴出する内向き炎孔も設けられるから、炊飯釜の釜底を一層確実に均一に加熱することができる。
More preferably, in the gas rice cooker, an inward flame hole is provided on the upper surface of the burner head to inject a flame inward.
From the outward flame hole formed on the outer peripheral edge of the burner head, the flame is ejected outward, so the center of the bottom of the rice cooker is hard to be heated. Since an inward flame hole through which the flame is ejected is also provided, the bottom of the rice cooker can be heated more reliably and uniformly.

本発明によれば、バーナヘッドに設けられた外向き炎孔から外向きに形成される火炎を、より外側に向かって長く延ばすことができるから、小径のバーナヘッドを有するガスバーナであっても、大径の炊飯釜の釜底の周縁に火炎を接触させて加熱することができる。これにより、むらのない良質な炊き上がりの炊飯が可能となると共に、炊飯釜の大きさに合わせてガスバーナを変更する必要がないから、不必要なコストアップを抑えることができ、生産性も向上させることができる。   According to the present invention, since the flame formed outward from the outward flame hole provided in the burner head can be extended longer outward, even a gas burner having a small diameter burner head, A large flame rice cooker can be heated by bringing a flame into contact with the periphery of the bottom. As a result, high-quality cooked rice can be cooked without unevenness, and there is no need to change the gas burner according to the size of the rice cooker, so unnecessary cost increases can be suppressed and productivity is improved. Can be made.

本発明の実施の形態に係るガス炊飯器の一例を示す要部概略説明図である。It is principal part schematic explanatory drawing which shows an example of the gas rice cooker which concerns on embodiment of this invention. 本発明の実施の形態に係るガス炊飯器の一例を示す要部拡大図である。It is a principal part enlarged view which shows an example of the gas rice cooker which concerns on embodiment of this invention. 本発明の実施の形態に係るガス炊飯器の一例を示す要部拡大断面図である。It is a principal part expanded sectional view which shows an example of the gas rice cooker which concerns on embodiment of this invention.

以下、本発明を実施するための形態について添付図面を参照しながら説明する。
本発明の実施の形態に係るガス炊飯器は、図1に示すように、炊飯釜(3)と、下ケース(31)と、下ケース(31)上に載置され且つ炊飯釜(3)を収容する上ケース(32)とを備えている。
下ケース(31)の上方開放端には、環状の汁受け皿(33)が外嵌するように装着されており、この汁受け皿(33)の中央孔(30)から、環状のバーナヘッド(21)が上方に突出するように、ガスバーナ(2)が下ケース(31)内に収容されている。
Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the gas rice cooker according to the embodiment of the present invention is placed on the rice cooker (3), the lower case (31), and the lower case (31), and the rice cooker (3). And an upper case (32) for housing the container.
An annular juice tray (33) is mounted on the upper open end of the lower case (31) so as to fit outside, and an annular burner head (21) is inserted from the central hole (30) of the juice tray (33). ) Protrudes upward, the gas burner (2) is accommodated in the lower case (31).

下ケース(31)には、さらに、バーナヘッド(21)の内周空間(21a)内に位置するように、感熱部材(34)が設けられており、その上端の感熱素子(35)が、炊飯釜(3)の釜底下面の中央部から下方に突設させた円柱状の被感熱部(3a)の下端面に接触して、被感熱部(3a)の温度を検知する。炊飯釜(3)の温度が所定の炊上がり温度に達したときに、感熱素子(35)がそれを検知し、ガスバーナ(2)が消火されるように設定されている。   The lower case (31) is further provided with a heat sensitive member (34) so as to be located in the inner circumferential space (21a) of the burner head (21), and a heat sensitive element (35) at the upper end thereof is provided. The temperature of the heat-sensitive part (3a) is detected by contacting the lower end surface of the cylindrical heat-sensitive part (3a) projecting downward from the central part of the bottom surface of the bottom of the rice cooker (3). When the temperature of the rice cooker (3) reaches a predetermined cooking temperature, the heat sensitive element (35) detects it and the gas burner (2) is set to be extinguished.

ガスバーナ(2)のバーナヘッド(21)は、炊飯釜(3)の釜底の径(例えば、360mm)に比べて十分に小さな径(例えば、150mm)を有しており、バーナヘッド(21)の内周空間(21a)の上端近傍及び外周縁にはそれぞれ、内向き炎孔(22)及び外向き炎孔(20)が形成されている。これら内向き炎孔(22)及び外向き炎孔(20)からそれぞれ、火炎(F1)(F2)が内向き及び外向きに形成される。   The burner head (21) of the gas burner (2) has a sufficiently small diameter (for example, 150 mm) compared to the diameter (for example, 360 mm) of the bottom of the rice cooker (3), and the burner head (21) An inward flame hole (22) and an outward flame hole (20) are formed in the vicinity of the upper end and the outer peripheral edge of the inner circumferential space (21a), respectively. Flames (F1) and (F2) are formed inward and outward from the inward flame hole (22) and the outward flame hole (20), respectively.

ガスバーナ(2)は、図示しない筒部を介して燃料ガスとともにバーナヘッド(21)に供給される一次空気と、下ケース(31)内に取り込まれる二次空気とによって燃焼するブンゼンバーナからなる。外部の空気(フレッシュエアー)は、下ケース(31)内に取り込まれた後、上記二次空気として、二点鎖線の矢印に示すように、バーナヘッド(21)の内周空間(21a)と感熱部材(34)の外周面との間を通過して内向き炎孔(22)に送られると共に、実線の矢印に示すように、汁受け皿(33)の中央孔(30)を通過して外向き炎孔(20)へ送られていく。   The gas burner (2) is composed of a Bunsen burner that burns with primary air supplied to the burner head (21) together with fuel gas via a cylinder (not shown) and secondary air taken into the lower case (31). After the outside air (fresh air) is taken into the lower case (31), as the secondary air, the inner space (21a) of the burner head (21) is It passes between the outer peripheral surface of the heat sensitive member (34) and is sent to the inward flame hole (22), and also passes through the central hole (30) of the juice tray (33) as shown by the solid line arrow. It is sent to the outward flame hole (20).

バーナヘッド(21)の下面(23)は、外向き炎孔(20)に向かって上昇するテーパ面からなり、この下面(23)の下方に、所定の距離離間させて、当該下面(23)と略同一のテーパ角度を有するテーパ状の二次空気制限板(1)が設けられている。   The lower surface (23) of the burner head (21) is a tapered surface that rises toward the outward flame hole (20), and is separated from the lower surface (23) by a predetermined distance below the lower surface (23). And a tapered secondary air restriction plate (1) having substantially the same taper angle.

二次空気制限板(1)は、バーナヘッド(21)の上下端よりもそれぞれ大径の上下開口部を有する金属製の環状体から形成されており、図2に示すような、固定具(10)を複数個用いることにより、バーナヘッド(21)の下面(23)の複数箇所に固定されている。従って、バーナヘッド(21)の下面(23)と二次空気制限板(1)の上面とは略平行に対向する態様となり、両者間には、固定具(10)の高さ(h)に相当する幅(例えば、4mm)の第1の空気通路(11)が形成され、二次空気制限板(1)の下面側には、第2の空気通路(12)が形成される。   The secondary air restriction plate (1) is formed of a metal annular body having upper and lower openings that are larger in diameter than the upper and lower ends of the burner head (21). By using a plurality of 10), the burner head (21) is fixed at a plurality of locations on the lower surface (23). Accordingly, the lower surface (23) of the burner head (21) and the upper surface of the secondary air restricting plate (1) are opposed to each other substantially in parallel, and the height (h) of the fixture (10) is between them. A first air passage (11) having a corresponding width (for example, 4 mm) is formed, and a second air passage (12) is formed on the lower surface side of the secondary air restriction plate (1).

二次空気制限板(1)の内周縁(1a)は汁受け皿(33)の中央孔(30)よりも内側にて、中央孔(30)の上方に臨んでいる。また、二次空気制限板(1)の外周縁(1b)は外向き炎孔(20)よりも外側にて上方に臨んでおり、図3に示すように、外向き炎孔(20)から二次空気制限板(1)の外周縁(1b)までの半径方向の距離(D1)は、例えば、約15mmに設定されており、高さ方向の距離(D2)は、例えば、約1mmに設定されている。
同様に、二次空気制限板(1)の外周縁(1b)は、汁受け皿(33)の中央孔(30)よりも外側にて上方に位置しており、汁受け皿(33)の中央孔(30)から二次空気制限板(1)の外周縁(1b)までの半径方向の距離(D3)は、約5mmに設定されている。
さらに、バーナヘッド(21)の下面(23)と二次空気制限板(1)の上面との最短距離(d1)(上記した固定具(1)の高さ(h)に相当する)は、二次空気制限板(1)の下面と汁受け皿(33)の上面との間の最短距離(d2)(例えば、15mm)よりも小さくなるように設定されている。
The inner peripheral edge (1a) of the secondary air restriction plate (1) faces the upper side of the central hole (30) on the inner side of the central hole (30) of the juice receiving tray (33). Further, the outer peripheral edge (1b) of the secondary air restriction plate (1) faces upward on the outer side from the outward flame hole (20), and as shown in FIG. 3, from the outward flame hole (20). The radial distance (D1) to the outer peripheral edge (1b) of the secondary air restriction plate (1) is set to about 15 mm, for example, and the height distance (D2) is about 1 mm, for example. Is set.
Similarly, the outer peripheral edge (1b) of the secondary air restriction plate (1) is located above the central hole (30) of the juice tray (33) and is located above the central hole of the juice tray (33). The radial distance (D3) from (30) to the outer peripheral edge (1b) of the secondary air restriction plate (1) is set to about 5 mm.
Further, the shortest distance (d1) between the lower surface (23) of the burner head (21) and the upper surface of the secondary air restriction plate (1) (corresponding to the height (h) of the fixing device (1) described above) is It is set to be smaller than the shortest distance (d2) (for example, 15 mm) between the lower surface of the secondary air restriction plate (1) and the upper surface of the juice receiving tray (33).

本実施の形態のガス炊飯器では、炊飯時にガスバーナ(2)が点火されると、下ケース(31)内へ取り込まれるフレッシュエアーの一部は、上記した二点鎖線の矢印に示すように、バーナヘッド(21)の内周空間(21a)と感熱部材(34)の外周面との間を通過して内向き炎孔(22)に送られる。これにより、内向き炎孔(22)から炊飯釜(3)の釜底の中央部に向かって火炎(F1)が形成される。   In the gas rice cooker of the present embodiment, when the gas burner (2) is ignited at the time of rice cooking, a part of the fresh air taken into the lower case (31) is, as shown by the two-dot chain line arrow, It passes between the inner peripheral space (21a) of the burner head (21) and the outer peripheral surface of the heat sensitive member (34) and is sent to the inward flame hole (22). Thus, a flame (F1) is formed from the inward flame hole (22) toward the center of the bottom of the rice cooker (3).

また、フレッシュエアーの他の一部は、下ケース(31)内に収容されているガスバーナ(2)の周壁の周囲から汁受け皿(33)の中央孔(30)に向かって上昇する。そして、二次空気制限板(1)は、バーナヘッド(21)の下方に配設され、その内周縁(1a)は汁受け皿(33)の中央孔(30)より内側に臨んでいるため、汁受け皿(33)の中央孔(30)を通過したフレッシュエアーは、二次空気制限板(1)によって、細い実線の矢印示す第1のフレッシュエアーと、白抜きの太い矢印に示す第2のフレッシュエアーとに分離され、第1、第2空気通路(11)(12)をそれぞれ外側上方に向かって流れて行く。
第1の空気通路(11)を形成しているバーナヘッド(21)の下面(23)と二次空気制限板(1)の上面との間の最短距離(d1)よりも、第2の空気通路(12)を形成している二次空気制限板(1)の下面と汁受け皿(33)の上面との間の最短距離(d2)の方が広く設定されていると共に、二次空気制限板(1)の外周縁(1b)は、外向き炎孔(20)よりも外側へ延在しているから、バーナヘッド(21)の外向き炎孔(20)に直接流れる第1のフレッシュエアーの流量は、第2の空気通路(12)へ流れる第2のフレッシュエアーのそれよりも少なくなり、二次空気制限板(1)が形成されていない場合に比べて確実に減少する。よって、外向き炎孔(20)に形成される火炎(F2)は、二次空気不足となる。
Further, the other part of the fresh air rises from the periphery of the peripheral wall of the gas burner (2) accommodated in the lower case (31) toward the central hole (30) of the soup pan (33). And the secondary air restriction plate (1) is disposed below the burner head (21), and its inner peripheral edge (1a) faces the inner side of the central hole (30) of the juice tray (33), so The fresh air that has passed through the central hole (30) of the soup pan (33) is separated by the secondary air restriction plate (1) into the first fresh air indicated by the thin solid arrow and the second indicated by the thick white arrow. The air is separated into fresh air and flows through the first and second air passages (11) and (12) upward and outward.
The second air is shorter than the shortest distance (d1) between the lower surface (23) of the burner head (21) forming the first air passage (11) and the upper surface of the secondary air restriction plate (1). The shortest distance (d2) between the lower surface of the secondary air restriction plate (1) forming the passage (12) and the upper surface of the juice receiving tray (33) is set wider, and the secondary air restriction Since the outer peripheral edge (1b) of the plate (1) extends outward from the outward flame hole (20), the first fresh flowing directly into the outward flame hole (20) of the burner head (21). The flow rate of the air is smaller than that of the second fresh air flowing into the second air passage (12), and is reliably reduced as compared with the case where the secondary air restriction plate (1) is not formed. Therefore, the flame (F2) formed in the outward flame hole (20) is short of secondary air.

既述したように、二次空気制限板(1)の外周縁(1b)はバーナヘッド(21)の外向き炎孔(20)よりも外側上方に位置するように設定されているから、二次空気制限板(1)の下面側に形成される第2の空気通路(12)を流れる第2のフレッシュエアーは二次空気制限板(1)の外周縁(1b)から外側上方に向かって流れる。これにより、外向き炎孔(20)に形成される二次空気不足の火炎(F2)は、第2のフレッシュエアーを求めて斜め上方へ長く延び、炊飯釜(3)の釜底の周縁(300)に届く火炎(F3)まで延ばすことができる。   As described above, the outer peripheral edge (1b) of the secondary air restriction plate (1) is set so as to be located on the outer upper side of the outward flame hole (20) of the burner head (21). The second fresh air flowing through the second air passage (12) formed on the lower surface side of the secondary air restriction plate (1) is directed outward from the outer peripheral edge (1b) of the secondary air restriction plate (1). Flowing. Thus, the secondary air-deficient flame (F2) formed in the outward flame hole (20) extends obliquely upward for the second fresh air, and the peripheral edge of the bottom of the rice cooker (3) ( Can be extended to the flame (F3) reaching 300).

このように、本発明の実施の形態のガス炊飯器によれば、小径のバーナヘッド(21)を有するガスバーナであっても、大径の炊飯釜(3)の釜底の周縁(300)に火炎(F3)を接触させて加熱することができる。また、炊飯釜(3)の釜底の中央部には、火炎(F1)(F2)を接触させて加熱することができる。これにより、むらのない良質な炊き上がりの炊飯が可能となる。さらに、炊飯釜(3)の大きさに合わせてガスバーナ(2)の径を変更する必要がないから、不必要なコストアップを抑えることができ、生産性も向上させることができる。   Thus, according to the gas rice cooker of the embodiment of the present invention, even the gas burner having the small-diameter burner head (21) is attached to the periphery (300) of the bottom of the large-diameter rice cooker (3). A flame (F3) can be brought into contact and heated. In addition, flame (F1) (F2) can be brought into contact with the center of the bottom of the rice cooker (3) and heated. Thereby, it becomes possible to cook rice with high quality without unevenness. Furthermore, since it is not necessary to change the diameter of the gas burner (2) in accordance with the size of the rice cooker (3), unnecessary cost increase can be suppressed and productivity can be improved.

なお、上記実施の形態では、二次空気制限板(1)は固定具(10)によりバーナヘッド(21)の下面に固定されているが、二次空気制限板(1)の内周縁(1a)から下方に延設させた複数の取付け部を設け、取付け部をガスバーナ(2)の周壁に固定してもよい。また、上記実施の形態では、二次空気制限板(1)は単一のテーパ角度で形成されているが、異なるテーパ角度を組み合わせたり、水平面を有する形状としてもよい。   In the above embodiment, the secondary air restriction plate (1) is fixed to the lower surface of the burner head (21) by the fixture (10), but the inner peripheral edge (1a) of the secondary air restriction plate (1) ) May be provided, and a plurality of attachment portions may be provided so as to be fixed to the peripheral wall of the gas burner (2). Further, in the above embodiment, the secondary air restriction plate (1) is formed with a single taper angle, but it may have a shape with a combination of different taper angles or a horizontal plane.

(1) ・・・・・・・・・二次空気制限板
(1a)・・・・・・・・・二次空気制限板の内周縁
(1b)・・・・・・・・・二次空気制限板の外周縁
(11)・・・・・・・・・第1の空気通路
(12)・・・・・・・・・第2の空気通路
(2) ・・・・・・・・・ガスバーナ
(20)・・・・・・・・・外向き炎孔
(21)・・・・・・・・・バーナヘッド
(3) ・・・・・・・・・炊飯釜
(1) ・ ・ ・ ・ ・ ・ ・ ・ ・ Secondary air restriction plate
(1a) ・ ・ ・ ・ ・ ・ ・ ・ ・ Inner peripheral edge of the secondary air restriction plate
(1b) .... Outer edge of secondary air restriction plate
(11) ... 1st air passage
(12) .... Second air passage
(2) ・ ・ ・ ・ ・ ・ ・ ・ ・ Gas burner
(20) ...
(21) ... Burner head
(3) ・ ・ ・ ・ ・ ・ ・ ・ ・ Cooking pot

Claims (5)

炊飯釜の下方に設置され且つ外周縁に複数の外向き炎孔が配設された環状のバーナヘッドを有するガスバーナを備えたガス炊飯器において、
前記バーナヘッドの下方に、環状の二次空気制限板を有し、
前記二次空気制限板は、前記二次空気制限板の上面側及び下面側にそれぞれ空気通路が形成されるように前記バーナヘッドの下面と離間して設けられていると共に、前記二次空気制限板の外周縁が前記外向き炎孔よりも外側に位置するように設けられているガス炊飯器。
In the gas rice cooker provided with a gas burner having an annular burner head installed below the rice cooker and provided with a plurality of outward flame holes on the outer periphery,
An annular secondary air restriction plate is provided below the burner head,
The secondary air restriction plate is provided apart from the lower surface of the burner head so that air passages are formed on the upper surface side and the lower surface side of the secondary air restriction plate, respectively, and the secondary air restriction plate The gas rice cooker provided so that the outer periphery of a board may be located outside the said outward flame hole.
請求項1に記載のガス炊飯器は、前記二次空気制限板の下方に、中央孔を有する環状の汁受け皿を有し、
前記二次空気制限板の外周縁は、前記汁受け皿の中央孔よりも外側に位置するように設けられているガス炊飯器。
The gas rice cooker according to claim 1 has an annular juice tray having a central hole below the secondary air restriction plate,
The gas rice cooker provided so that the outer periphery of the said secondary air restriction | limiting board may be located outside the center hole of the said juice receiving tray.
請求項1または2に記載のガス炊飯器において、前記バーナヘッドの下面は、外側に向かって上昇するテーパ面で形成されており、
前記二次空気制限板は、前記バーナヘッドの下面のテーパ面と略同一のテーパ角度を有するテーパ状に設けられているガス炊飯器。
The gas cooker according to claim 1 or 2, wherein the lower surface of the burner head is formed with a tapered surface that rises outward.
The secondary air restriction plate is a gas cooker provided in a tapered shape having a taper angle substantially the same as the tapered surface of the lower surface of the burner head.
請求項2または3に記載のガス炊飯器において、前記二次空気制限板は、前記バーナヘッドの下面と前記二次空気制限板の上面との間の最短距離が、前記二次空気制限板の下面と前記汁受け皿の上面との間の最短距離よりも小さくなるように設けられているガス炊飯器。   4. The gas rice cooker according to claim 2, wherein the secondary air restriction plate has a shortest distance between a lower surface of the burner head and an upper surface of the secondary air restriction plate of the secondary air restriction plate. The gas rice cooker provided so that it may become smaller than the shortest distance between a lower surface and the upper surface of the said juice pan. 請求項1から4のいずれかに記載のガス炊飯器は、前記バーナヘッドの上面に、内方に向かって火炎が噴出する内向き炎孔が配設されているガス炊飯器。

The gas rice cooker according to any one of claims 1 to 4, wherein an inward flame hole is provided on the upper surface of the burner head to inject a flame inward.

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48113728U (en) * 1972-03-29 1973-12-26
JPS50121093U (en) * 1974-03-23 1975-10-03
JP2001215023A (en) * 2000-02-03 2001-08-10 Harman Co Ltd Gas stove

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS48113728U (en) * 1972-03-29 1973-12-26
JPS50121093U (en) * 1974-03-23 1975-10-03
JP2001215023A (en) * 2000-02-03 2001-08-10 Harman Co Ltd Gas stove

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