JPH0828827A - Surface combustion burner - Google Patents
Surface combustion burnerInfo
- Publication number
- JPH0828827A JPH0828827A JP16244894A JP16244894A JPH0828827A JP H0828827 A JPH0828827 A JP H0828827A JP 16244894 A JP16244894 A JP 16244894A JP 16244894 A JP16244894 A JP 16244894A JP H0828827 A JPH0828827 A JP H0828827A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- silicon carbide
- ceramic
- fiber paper
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- Gas Burners (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、強制給気または常圧で
全一次燃焼させる表面燃焼バーナに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface-combustion burner in which all primary combustion is performed by forced air supply or normal pressure.
【０００２】[0002]
【従来の技術】セラミック綿を燃焼表面部に配置してバ
ーナエレメントとし、暖房、調理などの用途に使用する
表面燃焼バーナが、種種提案されている（たとえば、特
開昭５６−５９１１６号公報、特開昭５６−５６５１４
号公報、特開昭５７−４７１２０号公報）。この種の表
面燃焼バーナでは、バーナエレメントを形成するセラミ
ック繊維の隙間を、燃料ガスと燃焼用空気との予混合気
を通過させて供給し、セラミック綿の表面で燃焼させて
セラミック繊維を赤熱させるようになっている。また、
燃焼面に使用するセラミック綿は所定の厚さと密度が必
要であり、バーナエレメントの通気抵抗が大きい。この
ため、従来の表面燃焼バーナは、ブロワなどの強制給気
手段で燃焼用空気を供給する加圧式バーナとなってい
る。2. Description of the Related Art Various types of surface combustion burners have been proposed for use in heating, cooking, etc. by arranging ceramic cotton on the combustion surface to form burner elements (for example, Japanese Patent Laid-Open No. 56-59116). JP-A-56-56514
Japanese Patent Laid-Open No. 57-47120). In this type of surface combustion burner, the gap between the ceramic fibers forming the burner element is supplied by passing through a premixed mixture of fuel gas and combustion air, and the ceramic fibers are burned to make the ceramic fibers red hot. It is like this. Also,
The ceramic cotton used for the combustion surface must have a certain thickness and density, and the burner element has a large air flow resistance. Therefore, the conventional surface combustion burner is a pressurizing burner that supplies combustion air by forced air supply means such as a blower.
【０００３】[0003]
【発明が解決しようとする課題】表面燃焼バーナは、赤
熱までの時間を短縮するため、直径の細いセラミック繊
維を用いるので、機械的強度が小さく、赤熱時に繊維が
千切れて火の粉となって消耗し易い。とくにブロワで一
次空気を強制給気する加圧式バーナの場合は、一次空気
をエジェクター機構で吸い込ませる常圧式の燃焼に比較
して燃焼面の燃焼気流が高流速になり、セラミック繊維
の消耗により耐久性が不充分となり易い。Since the surface combustion burner uses a ceramic fiber having a small diameter in order to shorten the time until red heat, the mechanical strength is low, and the fiber is shredded and burned into sparks during red heat. Easy to do. In particular, in the case of a pressurized burner that forcibly supplies primary air with a blower, the combustion airflow on the combustion surface has a higher flow velocity compared to normal pressure combustion in which primary air is sucked in by an ejector mechanism, and it is durable due to the consumption of ceramic fibers. It is easy to become inadequate.
【０００４】請求項１に記載の発明の目的は、炭化珪素
繊維の形状をペーパー状に成形するとともに、繊維の直
径、密度、厚さを適切に設定することにより、赤熱時間
が短くかつ耐久性に優れるとともに、常圧式での燃焼が
可能である表面燃焼バーナを提供することにある。請求
項２に記載の発明の目的は、炭化珪素繊維ペーパーの固
着が容易かつ強固にできる表面燃焼バーナの提供にあ
る。請求項３に記載の発明の目的は、平板状の燃焼面を
有する表面燃焼バーナの提供にある。The object of the invention described in claim 1 is to form a silicon carbide fiber in the shape of paper and to appropriately set the diameter, density and thickness of the fiber so that the red heat time is short and the durability is high. (EN) Provided is a surface combustion burner which is excellent in heat resistance and can be burned under normal pressure. An object of the invention described in claim 2 is to provide a surface combustion burner capable of easily and firmly fixing silicon carbide fiber paper. An object of the invention described in claim 3 is to provide a surface combustion burner having a flat combustion surface.
【０００５】[0005]
【課題を解決するための手段】請求項１に記載の発明の
表面燃焼バーナは、多数の炎孔が設けられた燃焼面に、
９〜２５μｍの太さのＳｉＣ繊維を用い、ＳｉＣ繊維の
密度を２．０〜３．０ｇ／ｃｍ3 とし、厚さが０．１〜
０．５ｍｍの炭化珪素繊維ペーパーを接合してなる。請
求項２に記載の発明の表面燃焼バーナは、前記炭化珪素
繊維ペーパーの前記燃焼面への接合は、金属アルコキシ
ド系のセラミック接着剤、またはアルミナゾル及びシリ
カゾル又はこれらの混合物などからなるセラミック接着
剤、または耐火セメントなどの耐熱セラミック層により
なされたことを特徴とする。請求項３に記載の発明の表
面燃焼バーナは、燃焼面が所定のパターンで多数の炎孔
が設けられたセラミックプレートにより形成されてい
る。A surface combustion burner according to the first aspect of the present invention is characterized in that a combustion surface having a large number of flame holes is provided.
Using SiC fiber having a thickness of 9 to 25 μm, the density of the SiC fiber is 2.0 to 3.0 g / cm 3 , and the thickness is 0.1 to
It is formed by joining 0.5 mm silicon carbide fiber paper. In the surface combustion burner of the invention according to claim 2, the bonding of the silicon carbide fiber paper to the combustion surface is a metal alkoxide-based ceramic adhesive, or a ceramic adhesive composed of alumina sol and silica sol or a mixture thereof, Alternatively, it is characterized by being made of a heat-resistant ceramic layer such as refractory cement. In the surface combustion burner according to the third aspect of the present invention, the combustion surface is formed of a ceramic plate provided with a large number of flame holes in a predetermined pattern.
【０００６】[0006]
【発明の作用および効果】請求項１に記載の発明では、
セラミック繊維として最適な太さ、密度および厚さの炭
化珪素（ＳｉＣ）繊維ペーパーを用いているので、赤熱
時間が短くかつ耐久性に優れるとともに、従来のセラミ
ック綿をバーナエレメントとした表面燃焼バーナでは困
難であった常圧燃焼が可能であり、かつ耐久性に優れ
る。請求項２に記載の発明では、炭化珪素（ＳｉＣ）繊
維ペーパーの固着が迅速かつ強固にできる。請求項３に
記載の発明では、請求項２に記載の構成を有する表面燃
焼バーナのうち、最も構造が単純で用途の広い表面燃焼
バーナが形成できる。According to the invention described in claim 1,
Since silicon carbide (SiC) fiber paper with the optimum thickness, density and thickness is used as the ceramic fiber, it has a short red-hot time and excellent durability, and in conventional surface combustion burners using ceramic cotton as a burner element. It is possible to burn at atmospheric pressure, which was difficult, and has excellent durability. According to the second aspect of the invention, the silicon carbide (SiC) fiber paper can be fixed quickly and firmly. According to the invention described in claim 3, among the surface combustion burners having the structure described in claim 2, the surface combustion burner having the simplest structure and wide application can be formed.
【０００７】[0007]
【実施例】図１の（イ）および（ロ）はこの発明の第１
実施例にかかる表面燃焼バーナ１００を示し、図示しな
いエジェクターで燃焼用空気が吸引され、常圧で全一次
（予混合）燃焼を行う。表面燃焼バーナ１００は、内周
棚１１が設けられたバーナボディ１の上端開口に燃焼板
２を嵌め込み、バーナボディ１の上端に枠部材１２を載
置して燃焼板２を固定してなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1A and 1B show the first aspect of the present invention.
1 shows a surface combustion burner 100 according to an embodiment, in which combustion air is sucked by an ejector (not shown), and all primary (premix) combustion is performed at normal pressure. In the surface combustion burner 100, a combustion plate 2 is fitted into an upper end opening of a burner body 1 provided with an inner peripheral shelf 11, and a frame member 12 is placed on the upper end of the burner body 1 to fix the combustion plate 2.
【０００８】燃焼板２は、多数の炎孔３１が所定のパタ
ーンで分散して形成されたセラミックプレート３と、該
セラミックプレート３の上面に耐熱セラミック層４で貼
り付けられ、前記炎孔３１を覆って燃焼面を形成するバ
ーナエレメントとしての炭化珪素繊維ペーパー（不織
布）５とからなる。耐熱セラミック層４には、金属アル
コキシド系のセラミック接着剤、またはアルミナゾル及
びシリカゾル又はこれらの混合物などからなるセラミッ
ク接着剤のほか、耐火セメントを用いてもよい。In the combustion plate 2, a large number of flame holes 31 are dispersed in a predetermined pattern, and a ceramic plate 3 is attached to the upper surface of the ceramic plate 3 with a heat-resistant ceramic layer 4. It comprises a silicon carbide fiber paper (nonwoven fabric) 5 as a burner element that covers and forms a combustion surface. For the heat-resistant ceramic layer 4, in addition to a metal alkoxide-based ceramic adhesive, a ceramic adhesive made of alumina sol and silica sol, or a mixture thereof, refractory cement may be used.
【０００９】燃焼板２の設計においては、セラミックプ
レート３の炎孔３１は、通常の常圧式全一次燃焼におけ
るセラミックプレートの炎孔より、炭化珪素繊維ペーパ
ー５の通気抵抗分だけ大きくして、噴出速度を調整する
ことが重要である。この実施例では、炎孔３１は直径が
１ｍｍ〜５ｍｍで、開口率が３０％から５０％に設定し
ている。In designing the combustion plate 2, the flame holes 31 of the ceramic plate 3 are made larger than the flame holes of the ceramic plate in the normal primary combustion of the normal pressure by the amount of ventilation resistance of the silicon carbide fiber paper 5 and ejected. It is important to adjust the speed. In this embodiment, the flame hole 31 has a diameter of 1 mm to 5 mm and an aperture ratio of 30% to 50%.
【００１０】炭化珪素繊維ペーパー５の接合は、セラミ
ックプレート３の上面へセラミック接着剤、たとえば金
属アルコキシド系のセラミック接着剤、またはアルミナ
ゾル及びシリカゾル又はこれらの混合物などからなるセ
ラミック接着剤などを塗布し、このセラミック接着剤上
に炭化珪素繊維ペーパー５を載せて上から押圧する。こ
の貼り付け作業は、セラミック接着剤が強い接着力を有
するため作業が簡単で自動化が容易であるとともに、炭
化珪素繊維ペーパー５の固着が強固にできる。この固着
体を焼成して耐熱セラミック層を形成してセラミックプ
レート３と炭化珪素繊維ペーパー５の結合体を製造す
る。金属アルコキシド系のセラミック接着剤、またはア
ルミナゾル及びシリカゾル又はこれらの混合物などから
なるセラミック接着剤を用いるのは、これは接着力が強
く炭化珪素繊維ペーパー５をセラミックプレート３の上
面へ容易に張り付けることができるとともに、焼成によ
り急冷、急加熱の繰り返しに強く耐久性に優れた耐熱セ
ラミック層４を形成できるからである。To bond the silicon carbide fiber paper 5, a ceramic adhesive, for example, a metal alkoxide-based ceramic adhesive, or a ceramic adhesive composed of alumina sol and silica sol or a mixture thereof is applied to the upper surface of the ceramic plate 3, The silicon carbide fiber paper 5 is placed on this ceramic adhesive and pressed from above. This sticking operation is easy and easy to automate because the ceramic adhesive has a strong adhesive force, and the silicon carbide fiber paper 5 can be firmly fixed. The fixed body is fired to form a heat-resistant ceramic layer to manufacture a combined body of the ceramic plate 3 and the silicon carbide fiber paper 5. A metal alkoxide-based ceramic adhesive or a ceramic adhesive composed of alumina sol and silica sol or a mixture thereof is used because it has a strong adhesive force and the silicon carbide fiber paper 5 is easily attached to the upper surface of the ceramic plate 3. In addition, it is possible to form the heat-resistant ceramic layer 4 that is resistant to repeated rapid cooling and rapid heating and has excellent durability.
【００１１】炭化珪素繊維ペーパー５は、９〜２５μｍ
の太さのＳｉＣ繊維を用い、ＳｉＣ繊維の密度を２．０
〜３．０ｇ／ｃｍ3 とし、炭化珪素繊維ペーパー５の厚
さは０．１〜０．５ｍｍに成形する。この炭化珪素繊維
ペーパー５は、金属アルコキシド系の接着剤、またはア
ルミナゾル及びシリカゾル又はこれらの混合物からなる
接着剤を含浸させてＳｉＣ繊維を接着させて形成されて
いる。接着剤として、金属アルコキシド系の接着剤、ま
たはアルミナゾル及びシリカゾル又はこれらの混合物か
らなる接着剤を用いる理由は上記と同様である。The silicon carbide fiber paper 5 has a thickness of 9 to 25 μm.
The thickness of the SiC fiber is 2.0, and the density of the SiC fiber is 2.0.
And to 3.0 g / cm 3, the thickness of the silicon carbide fiber paper 5 is formed into 0.1 to 0.5 mm. The silicon carbide fiber paper 5 is formed by impregnating a metal alkoxide adhesive or an adhesive composed of alumina sol and silica sol or a mixture thereof with SiC fibers adhered. The reason for using a metal alkoxide-based adhesive, an adhesive composed of alumina sol and silica sol, or a mixture thereof as the adhesive is the same as above.
【００１２】ＳｉＣ繊維および炭化珪素繊維ペーパー５
の寸法限定は以下の理由による。ＳｉＣ繊維の太さは、
９μｍより細いと炭化珪素繊維ペーパー５の強度が弱
く、取扱が困難となり、２５μｍより太いと比熱が大き
くなり、燃焼時に赤熱状態が得られ難い。また、繊維の
密度は、２．０ｇ／ｃｍ3 以下であると強度が弱く耐久
性が不充分であり、３．０ｇ／ｃｍ3 以上であると強度
は強いが燃焼ガスの通過抵抗が大きくなり燃焼状態が悪
くなる。さらに、厚さは、０．１ｍｍ以下だと強度が弱
く耐久性が不充分であり、０．５ｍｍ以上であると強度
は強いが燃焼ガスの通過抵抗が大きくなり燃焼状態が悪
くなる。SiC fiber and silicon carbide fiber paper 5
The size limitation of is due to the following reasons. The thickness of SiC fiber is
If it is thinner than 9 μm, the strength of the silicon carbide fiber paper 5 is weak and it becomes difficult to handle, and if it is thicker than 25 μm, the specific heat becomes large and it is difficult to obtain a red heat state during combustion. When the fiber density is 2.0 g / cm 3 or less, the strength is weak and the durability is insufficient, and when the fiber density is 3.0 g / cm 3 or more, the strength is strong but the combustion gas passage resistance is increased. The combustion condition deteriorates. Further, if the thickness is 0.1 mm or less, the strength is weak and the durability is insufficient, and if the thickness is 0.5 mm or more, the strength is strong but the combustion gas passage resistance is large and the combustion state is deteriorated.
【００１３】この表面燃焼バーナ１００では、空気過剰
率λ＝１．１〜１．５の全一次予混合気がバーナボディ
１に供給され、図示しない点火装置で点火されて着火す
る。燃焼はバーナエレメントを構成する炭化珪素繊維ペ
ーパー５の上面付近でなされ、炭化珪素繊維ペーパー５
の上面付近のＳｉＣ繊維は加熱されて赤熱する。この燃
焼において、ＳｉＣ繊維は、熱伝導率が大きく比熱が小
さいという特性と、形態がファイバー状であるために熱
容量が小さく、かつ比表面積が大きいという特性との相
乗効果により、燃焼面の赤熱時間の短縮が可能となる。
また、高温となる燃焼面がＳｉＣ繊維であるため、耐熱
耐久性に優れるとともに、空気中の窒素と酸素とを結合
させた窒素酸化物を生成させる、いわゆる触媒作用が小
さい。このため、窒素酸化物の発生の少ない低ＮＯX 燃
焼が得られる。In this surface combustion burner 100, the entire primary premixed air having an excess air ratio λ = 1.1 to 1.5 is supplied to the burner body 1 and ignited by being ignited by an ignition device (not shown). Combustion is performed near the upper surface of the silicon carbide fiber paper 5 which constitutes the burner element.
The SiC fibers near the upper surface of the are heated and become red hot. In this combustion, the SiC fiber has a characteristic that the thermal conductivity is large and the specific heat is small, and that the fiber has a fiber shape, so that the heat capacity is small and the specific surface area is large. Can be shortened.
Further, since the combustion surface at high temperature is made of SiC fiber, it has excellent heat resistance and durability, and has a small so-called catalytic action for producing nitrogen oxides in which nitrogen and oxygen in the air are combined. Therefore, it is possible to obtain low NO x combustion with less generation of nitrogen oxides.
【００１４】図２の（イ）および（ロ）はこの発明の第
２実施例にかかる表面燃焼バーナ２００を示し、図示し
ないブロワで燃焼用空気が強制給気され、加圧状態で全
一次（予混合）燃焼を行う。燃焼板２の設計において、
セラミックプレート３の炎孔３１は、通常の常圧式全一
次燃焼におけるセラミックプレートの炎孔より、炭化珪
素繊維ペーパー５の通気抵抗分だけ大きくして、加圧式
燃焼に適した噴出速度に調整している。この実施例で
は、炎孔３１は直径が３ｍｍ〜５ｍｍで、開口率が２０
％から３０％に設定されている。2 (a) and 2 (b) show a surface combustion burner 200 according to a second embodiment of the present invention. Combustion air is forcibly supplied by a blower (not shown) and all primary ( Premix) Burn. In designing the combustion plate 2,
The flame holes 31 of the ceramic plate 3 are made larger than the flame holes of the ceramic plate in the normal atmospheric pressure primary combustion by the amount of the ventilation resistance of the silicon carbide fiber paper 5, and are adjusted to a jet speed suitable for pressurized combustion. There is. In this embodiment, the flame hole 31 has a diameter of 3 mm to 5 mm and an aperture ratio of 20.
% To 30%.
【００１５】図３はこの発明の第３実施例にかかる表面
燃焼バーナ３００を示し、加圧状態で全一次（予混合）
燃焼を行う。セラミックプレート３の炎孔３１は、入口
が直径１〜２ｍｍと小さく、出口５〜８ｍｍと大きい断
面形状を有する。この実施例では、加圧式燃焼でありな
がら炭化珪素繊維ペーパー５の予混合気の通過流速を低
減でき、ＳｉＣ繊維の消耗を低減できる利点がある。FIG. 3 shows a surface combustion burner 300 according to a third embodiment of the present invention.
Burn. The flame hole 31 of the ceramic plate 3 has a cross-sectional shape with an inlet having a small diameter of 1-2 mm and an outlet having a large diameter of 5-8 mm. In this embodiment, there is an advantage that the flow velocity of the premixed gas of the silicon carbide fiber paper 5 can be reduced while the pressure type combustion is performed, and the consumption of the SiC fiber can be reduced.
【図１】第１実施例の表面燃焼バーナの断面図および平
面図である。FIG. 1 is a sectional view and a plan view of a surface combustion burner according to a first embodiment.
【図２】第２実施例の表面燃焼バーナの断面図および平
面図である。FIG. 2 is a sectional view and a plan view of a surface combustion burner according to a second embodiment.
【図３】第３実施例の表面燃焼バーナの断面図である。FIG. 3 is a sectional view of a surface combustion burner according to a third embodiment.
１００ 表面燃焼バーナ １ バーナボディ ２ 燃焼板 ３ セラミックプレート ３１ 炎孔 ４ 耐熱セラミック層 ５ 炭化珪素繊維ペーパー 100 surface combustion burner 1 burner body 2 combustion plate 3 ceramic plate 31 flame hole 4 heat-resistant ceramic layer 5 silicon carbide fiber paper
Claims (3)
２５μｍの太さのＳｉＣ繊維を用い、ＳｉＣ繊維の密度
を２．０〜３．０ｇ／ｃｍ3 とし、厚さが０．１〜０．
５ｍｍの炭化珪素繊維ペーパーを接合してなる表面燃焼
バーナ。1. A combustion surface provided with a large number of flame holes,
SiC fibers having a thickness of 25 μm are used, the density of the SiC fibers is 2.0 to 3.0 g / cm 3 , and the thickness is 0.1 to 0.
A surface combustion burner formed by joining 5 mm silicon carbide fiber paper.
ーパーの前記燃焼面への接合は、金属アルコキシド系の
セラミック接着剤、またはアルミナゾル及びシリカゾル
又はこれらの混合物などからなるセラミック接着剤、ま
たは耐火セメントなどの耐熱セラミック層によりなされ
たことを特徴とする表面燃焼バーナ。2. The method according to claim 1, wherein the silicon carbide fiber paper is joined to the combustion surface by a metal alkoxide-based ceramic adhesive, a ceramic adhesive made of alumina sol and silica sol, or a mixture thereof, or refractory cement. A surface combustion burner characterized by being made of a heat resistant ceramic layer such as.
ートの表面に、金属アルコキシド系のセラミック接着
剤、またはアルミナゾル及びシリカゾル又はこれらの混
合物などからなるセラミック接着剤を塗布し、該接着剤
により前記炎孔を覆うように炭化珪素繊維ペーパーを貼
り付けて、焼成してなる表面燃焼バーナ。3. The surface of a ceramic plate provided with a large number of flame holes is coated with a metal alkoxide-based ceramic adhesive or a ceramic adhesive composed of alumina sol and silica sol or a mixture thereof, and the adhesive is used to A surface-combustion burner obtained by sticking silicon carbide fiber paper so as to cover the flame holes and firing it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06162448A JP3098383B2 (en) | 1994-07-14 | 1994-07-14 | Surface burning burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06162448A JP3098383B2 (en) | 1994-07-14 | 1994-07-14 | Surface burning burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0828827A true JPH0828827A (en) | 1996-02-02 |
| JP3098383B2 JP3098383B2 (en) | 2000-10-16 |
Family
ID=15754808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06162448A Expired - Lifetime JP3098383B2 (en) | 1994-07-14 | 1994-07-14 | Surface burning burner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3098383B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100418652B1 (en) * | 2001-06-21 | 2004-02-14 | 린나이코리아 주식회사 | Surface combustion burner |
| KR100739541B1 (en) * | 2006-02-06 | 2007-07-18 | 엘지전자 주식회사 | Gas radiation burner |
| US7721726B2 (en) | 2006-01-03 | 2010-05-25 | Lg Electronics Inc. | Gas radiation burner |
| JP2019013775A (en) * | 2018-09-12 | 2019-01-31 | 株式会社中西製作所 | Continuous rice cooking device |
| KR20200077774A (en) * | 2018-12-21 | 2020-07-01 | 주식회사 부-스타 | Pre-mixer geometry for homogeneous premixing (GAS+AIR) |
-
1994
- 1994-07-14 JP JP06162448A patent/JP3098383B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100418652B1 (en) * | 2001-06-21 | 2004-02-14 | 린나이코리아 주식회사 | Surface combustion burner |
| US7721726B2 (en) | 2006-01-03 | 2010-05-25 | Lg Electronics Inc. | Gas radiation burner |
| KR100739541B1 (en) * | 2006-02-06 | 2007-07-18 | 엘지전자 주식회사 | Gas radiation burner |
| JP2019013775A (en) * | 2018-09-12 | 2019-01-31 | 株式会社中西製作所 | Continuous rice cooking device |
| KR20200077774A (en) * | 2018-12-21 | 2020-07-01 | 주식회사 부-스타 | Pre-mixer geometry for homogeneous premixing (GAS+AIR) |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3098383B2 (en) | 2000-10-16 |
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