JP3937387B2 - Liquid fuel combustion equipment - Google Patents

Liquid fuel combustion equipment Download PDF

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Publication number
JP3937387B2
JP3937387B2 JP2001079751A JP2001079751A JP3937387B2 JP 3937387 B2 JP3937387 B2 JP 3937387B2 JP 2001079751 A JP2001079751 A JP 2001079751A JP 2001079751 A JP2001079751 A JP 2001079751A JP 3937387 B2 JP3937387 B2 JP 3937387B2
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Japan
Prior art keywords
liquid fuel
suction
pipe
air
oil
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Expired - Fee Related
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JP2001079751A
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Japanese (ja)
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JP2002276928A (en
JP2002276928A5 (en
Inventor
真史 田村
好孝 明里
聡 丹沢
賢之 福島
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Description

【0001】
【発明の属する技術分野】
本発明は、液体燃料を燃焼させる液体燃料燃焼装置に係り、より詳しくは、吸入パイプ先端の吸入口の近傍に穴部を設けて、油切れ時等に空気と燃料を同時に吸入できるようにした液体燃料燃焼装置に関するものである。
【0002】
【従来の技術】
図6は例えば特開平8−145333号公報に開示された従来の液体燃料燃焼装置の一例を示す縦断面図、図7は図6の電磁ポンプを拡大した縦断面図である。図に示すように、液体燃料燃焼装置は、液体燃料を供給するカートリッジ式の燃料タンク1と、その下部に配されて液体燃料を一定量貯える油受皿2と、その上部に配設されて、下部には油受皿2内の液体燃料を吸い上げる流路となる吸入パイプ3を、上部には送油パイプ4を設けた電磁ポンプ5と、送油パイプ4を介して電磁ポンプ5と接合する燃焼装置6とからなっている。
【0003】
電磁ポンプ5には、液体燃料の吸入流路を形成する管体7、管体7の上部に配設された出弁8、管体7の下部に配された吸入弁9、及び上下動するプランジャー10が設けられ、電磁ポンプ5の吸入パイプ3の下端には、ゴミなどが吸引されないように網状のフィルター11が装着されている。また、燃焼装置6には、燃焼用送風機12、燃焼用送風機12のファン13、回転数センサー14、送風管15、ヒーター16、気化筒17、バーナーヘッド18、バーナーヘッド18の炎孔19、及び点火プラグ20が設けられている。
【0004】
上記のように構成した従来の液体燃料燃焼装置の作用を説明する。燃焼に必要な液体燃料は電磁ポンプ5により、また、燃焼用空気は燃焼用送風機12より、燃焼ランク毎に適切な空燃比で燃焼装置6に供給される。
まず、その供給動作を説明する。図に示すように、管体7内に設けられた吸入弁9を有するプランジャー10とその上部に連接した出弁8で構成した電磁ポンプ5を駆動すると、油受皿2内の燃料が吸入パイプ3を通って吸い上げられ、送油パイプ4から燃焼装置6に供給される。
【0005】
次に、燃焼装置6の動作について説明する。送油パイプ4から供給された液体燃料は、ヒータ16により加熱された気化筒17の内面に触れて気化する。一方、同時に燃焼用空気が送油パイプ4の周囲から供給され、気化筒17内で混合されて混合ガスとなる。この混合ガスは、気化筒17の上部に配されたバーナーヘッド18の炎孔19より噴出したところで、点火プラグ20の放電火花により燃焼する。燃焼炎の有無および燃焼状態は、炎検知棒(図示せず)によって検知する。
【0006】
【発明が解決しようとする課題】
上記のように構成した液体燃料燃焼装置によれば、油面検知器が故障したときや、燃焼中に油受皿2内の灯油を抜かれたとき等に、油受皿2内の液体燃料の油面が減少して電磁ポンプ5の吸入パイプ3の下端面よりも下方になった場合、液体燃料ではなく空気を吸い上げてしまう。
【0007】
電磁ポンプ5に空気を吸い込んだ場合、液体燃料と空気の圧縮率の差により、プランジャー10下部の圧力が燃料に比べ空気の方が少ないため、負荷が減少し、プランジャー10の上下運動が大きくなり、突出力が大きくなって、電磁ポンプ5より上方の送油パイプ4内の液体燃料が、瞬時に多量に燃焼装置6内に供給されてしまう。液体燃料が多量に供給されると、液体燃料と空気のバランスが崩れて異常燃焼が生じ、立炎、白煙、臭気が発生する等の問題があった。
【0008】
本発明は上記のような課題を解決するためになされたもので、油受皿内の液体燃料が減少状態や空状態にある場合でも、空気の一気の吸い込みを防ぎ、液体燃料の突出過多による立炎、白煙、臭気を防止して、良好な燃焼を行うことができる液体燃料燃焼装置を提供することを目的とする。
【0009】
【課題を解決するための手段】
本発明は、液体燃料を貯え保有する油受皿と、油受皿内の液体燃料をくみ上げ送油パイプを通して燃焼装置に供給する電磁ポンプとを備え、電磁ポンプは、液体燃料の流路を形成する管体、その上部に配された吐出弁、その下部に吸入弁を配して上下動するプランジャー、及び管体下部に配置され下端の吸入口から油受皿の液体燃料を吸い上げる吸入パイプから構成される液体燃料燃焼装置であって、吸入パイプの吸入流路の吸入口近傍の側壁に吸入口に近接させてバイパス穴を設け、油受皿内の油面がバイパス穴よりも下方に位置したとき、バイパス穴から吸入流路内に空気が吸入され、吸入口から吸入流路内に液体燃料が吸入されて、吸入パイプへの急激な空気の流入を防止するようにしたものである。
【0010】
また、バイパス穴の開口面積を、吸入パイプの吸入口の開口面積よりも小さくした。
さらに、吸入口からバイパス穴近傍に至る吸入パイプの吸入流路の内径を他の部分の内径よりも縮径した。
【0013】
【発明の実施の形態】
[実施の形態1]
図1は本発明の実施の形態1に係る液体燃料燃焼装置の吸入パイプの構成を示す縦断面図である。なお、液体燃料燃焼装置の構成は従来例の図6、図7に示した場合と実質的に同様であり重複するので、その説明を省略する。
21は吸入パイプ3の吸入流路であり、21aは吸入流路21の先端に位置する吸入口である。22は吸入パイプ3の吸入口21a近傍の側部に設けた細径の横穴であり、吸入パイプ3の側壁と吸入流路21を貫通する。そして、油面23が横穴22よりも下方に位置したときは、横穴22から空気が、吸入パイプ3の先端に位置する吸入口21aからは燃料が吸入されるようにしてある。
【0014】
上記のように構成した本実施の形態の作用を説明する。灯油切れ等となり、油受皿2内の油面23が、吸入パイプ3の吸入口21a近傍に設けた横穴22よりも下方に位置すると、吸入パイプ3側部の横穴22からは空気を吸入し、吸入パイプ3先端の吸入口21aからは液体燃料を吸入する。このようにして、吸入パイプ3が空気と液体燃料を同時に吸い込むので、空気を徐々に吸い込むことになり、バーナに流入する液体燃料が徐々に減少して、バーナに設けた炎検知によって燃焼は自動的に停止する。したがって、一気に空気を吸い込むことによって生じる急激なバーナへの液体燃料流入を防止することができる。
【0015】
なお、吸入パイプ3の横穴22より空気を、吸入パイプ3の吸入口21aより液体燃料を同時に吸い込む場合、空気と液体燃料の比重の違いにより、空気の方を多量に吸い込むことになる。そのため、吸入パイプ3の横穴22の内径D2 を、吸入口21aの内径D1 よりも小さく形成することで、空気が液体燃料よりも多量に吸い込まれるのを防止することができる。
【0016】
[実施の形態2]
図2は本発明の実施の形態2に係る液体燃料燃焼装置の吸入パイプの構成を示す縦断面図、図3は図2の作用を説明する縦断面図である。なお、実施の形態1と同一部分には同じ符号を付し、説明を省略する(以下、同様)。
24は吸入パイプ3の吸入口21aから吸入口21a近傍の側部域に設けた、吸入パイプ3の側壁と吸入流路21をつなぐ細い切り込み穴である。
【0017】
上記のように構成した本実施の形態の作用を説明する。図2は、油面23が吸入パイプ3の側部に設けた切り込み穴24よりも下方になっても、液体燃料の表面張力によって、その切り込み穴24の上端は液体燃料によって塞がれて、いまだ吸入流路21内に空気を吸引していない状態を示す。図3は、その切り込み穴24の周囲の表面張力が、電磁ポンプ5による燃料吸込み圧力よりも小さくなり、切り込み穴24の上方が開口状態24aとなって、吸入流路21内に空気を吸い込むようになった状態を示している。
【0018】
こうして、油面23が図3に示す位置に達すると、吸入パイプ3が空気と燃料を同時に吸い込むので、空気を徐々に吸い込むことになり、バーナに流入する燃料が徐々に減少して、バーナに設けた炎検知によって燃焼は自動的に停止する。したがって、一気に空気を吸い込むことによって生じる急激なバーナへの燃料流入を防止することができる。
【0019】
なお、吸入パイプ3の切り込み穴24の周囲の表面張力が、電磁ポンプ5の燃料の吸込み圧力よりも小さくなって、切り込み穴24の上方に開口状態24aが形成され、空気を吸入流路21に吸込む場合に、空気と液体燃料との比重量の違いにより、空気の方を多量に吸込むことになる。そのため、開口状態24aにあって空気を吸込む場合の切り込み穴24の面積S2 を、吸入口21aの面積S1 よりも小さく形成することで、吸入空気が液体燃料よりも多量に吸込まれるのを防止することができる。
【0020】
[実施の形態3]
図4は本発明の実施の形態3に係る液体燃料燃焼装置の吸入パイプ下端の構成を示す縦断面図である。なお、実施の形態1と同一部分には同じ符号を付し、説明を省略する。本実施の形態では、実施の形態1で示した横穴22の近傍の流路であって吸入口21aに至るまでの吸入流路21を縮径流路21bとしたもので、その内径D1 を、それよりも上部に位置する吸入流路21の内径D3 よりも縮径したものである。
【0021】
上記のように構成した本実施の形態によれば、内径がD1 である吸入パイプ3の縮径流路21部分の吸い込み燃料の流速を早くし、吸入パイプ3側部からの吸入空気の気泡をそのままの径に保持しながら吸入することができ、電磁ポンプ5の流路中で大きな気泡に成長するので、燃料の一気の流入減少を防止することができる。
【0022】
[実施の形態4]
図4は本発明の実施の形態4に係る液体燃料燃焼装置の吸入パイプ下端の構成を示す縦断面図である。なお、実施の形態2と同一部分には同じ符号を付し、説明を省略する。本実施の形態では、実施の形態2で示した切り込み穴24の近傍の流路であって吸入口21aに至るまでの吸入流路を縮径流路21bとしたもので、その内径D1 を、それよりも上部に位置する吸入流路21の内径D3 よりも縮径したものである。
【0023】
上記のように構成した本実施の形態によれば、内径がD1 である吸入パイプ3の縮径流路21b部分の吸い込み燃料の流速を早くし、吸入パイプ3側からの吸入空気の気泡をそのままの径に保持しながら吸入することができ、電磁ポンプ5の流路中で大きな気泡に成長するので、燃料の一気の流入減少を防止することができる。
【0024】
【発明の効果】
以上の説明から明らかなように、本発明に係る液体燃料燃焼装置によれば、油受皿内の燃料の減少や、空状態からのくみ上げの際等において、電磁ポンプへの空気流入による液体燃料の突出過多による立炎、白煙、臭気を防止して、良好な燃焼を行うことができる。
より詳細には、以下の通りである。
【0025】
本発明は、液体燃料を貯え保有する油受皿と、油受皿内の液体燃料をくみ上げ送油パイプを通して燃焼装置に供給する電磁ポンプとを備え、該電磁ポンプは、液体燃料の流路を形成する管体、その上部に配された吐出弁、その下部に吸入弁を配して上下動するプランジャー、及び管体下部に配置され下端の吸入口から油受皿の液体燃料を吸い上げる吸入パイプから構成される液体燃料燃焼装置であって、吸入パイプの吸入流路の吸入口近傍の側壁に吸入口に近接させてバイパス穴を設け、油受皿内の油面がバイパス穴よりも下方に位置したとき、バイパス穴から吸入流路内に空気が吸入され、吸入口から吸入流路内に液体燃料が吸入されて、吸入パイプへの急激な空気の流入を防止するようにしたので、一気にに空気を吸い込むことがなくなる。
【0026】
また、バイパス穴の開口面積を、吸入パイプの吸入口の開口面積よりも小さくしたので、吸入空気量を液体燃料の吸入量よりも多量に吸い込むのを防止することができる。
さらに、吸入口からバイパス穴近傍に至る吸入パイプの吸入流路の内径を他の部分の内径よりも縮径したので、縮径部分の燃料の流速を速くして、側部から吸入された空気の泡をそのままの径で保持することが可能となる。
【図面の簡単な説明】
【図1】 本発明の実施の形態1の縦断面図である。
【図2】 本発明の実施の形態2の縦断面図である。
【図3】 本発明の実施の形態2の作用説明図である。
【図4】 本発明の実施の形態3の縦断面図である。
【図5】 本発明の実施の形態4の縦断面図である。
【図6】 従来の液体燃料燃焼装置の一例を示す縦断面図である。
【図7】 図6の要部を示す縦断面図である。
【符号の説明】
2 油受皿、3 吸入パイプ、4 送油パイプ、5 電磁ポンプ、6 燃焼装置、7 管体、8 出弁、9 吸入弁、10 プランジャー、21 吸入流路、21a 吸入口、21b 縮径流路、22 横穴、24 切り込み穴、24a 切り込み穴の開放状態。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid fuel combustion apparatus for burning liquid fuel, and more specifically, a hole is provided near the suction port at the tip of the suction pipe so that air and fuel can be sucked simultaneously when oil runs out. The present invention relates to a liquid fuel combustion apparatus.
[0002]
[Prior art]
6 is a longitudinal sectional view showing an example of a conventional liquid fuel combustion apparatus disclosed in, for example, Japanese Patent Laid-Open No. 8-145333, and FIG. 7 is an enlarged longitudinal sectional view of the electromagnetic pump shown in FIG. As shown in the figure, the liquid fuel combustion apparatus is provided with a cartridge type fuel tank 1 for supplying liquid fuel, an oil receiving tray 2 disposed at the lower part thereof for storing a certain amount of liquid fuel, and disposed at the upper part thereof. The lower part is a suction pipe 3 that serves as a flow path for sucking up liquid fuel in the oil tray 2, the upper part is an electromagnetic pump 5 provided with an oil feed pipe 4, and the combustion is joined to the electromagnetic pump 5 via the oil feed pipe 4. Device 6.
[0003]
The electromagnetic pump 5, tube 7 forming a suction passage of the liquid fuel, ejection-off valve 8 disposed at the top of the tube 7, the intake valve 9 disposed in the lower portion of the tube 7, and vertical movement A plunger 10 is provided, and a net-like filter 11 is attached to the lower end of the suction pipe 3 of the electromagnetic pump 5 so that dust and the like are not sucked. Further, the combustion device 6 includes a combustion blower 12, a fan 13 of the combustion blower 12, a rotation speed sensor 14, a blower pipe 15, a heater 16, a vaporizing cylinder 17, a burner head 18, a flame hole 19 of the burner head 18, and A spark plug 20 is provided.
[0004]
The operation of the conventional liquid fuel combustion apparatus configured as described above will be described. Liquid fuel necessary for combustion is supplied to the combustion device 6 by an electromagnetic pump 5 and combustion air is supplied from a combustion blower 12 to the combustion device 6 at an appropriate air-fuel ratio for each combustion rank.
First, the supply operation will be described. As shown, when the drive of electromagnetic pump 5 which is constituted by ejection off valve 8 which is connected with its upper plunger 10 having a suction valve 9 provided in the tube body 7, the fuel in the oil pan 2 is sucked It is sucked up through the pipe 3 and supplied from the oil feeding pipe 4 to the combustion device 6.
[0005]
Next, the operation of the combustion device 6 will be described. The liquid fuel supplied from the oil feeding pipe 4 is vaporized by touching the inner surface of the vaporizing cylinder 17 heated by the heater 16. On the other hand, combustion air is simultaneously supplied from the periphery of the oil feed pipe 4 and mixed in the vaporizing cylinder 17 to become a mixed gas. When this mixed gas is ejected from the flame hole 19 of the burner head 18 disposed in the upper part of the vaporizing cylinder 17, it is burned by the discharge spark of the spark plug 20. Presence / absence of combustion flame and combustion state are detected by a flame detection rod (not shown).
[0006]
[Problems to be solved by the invention]
According to the liquid fuel combustion apparatus configured as described above, the oil level of the liquid fuel in the oil pan 2 when the oil level detector breaks down or when kerosene in the oil pan 2 is pulled out during combustion or the like. Decreases and becomes lower than the lower end surface of the suction pipe 3 of the electromagnetic pump 5, air is sucked up instead of liquid fuel.
[0007]
When air is sucked into the electromagnetic pump 5, due to the difference in compressibility between the liquid fuel and air, the pressure at the lower part of the plunger 10 is less than that of the fuel, so the load is reduced and the plunger 10 moves up and down. As a result, the output is increased and the liquid fuel in the oil feed pipe 4 above the electromagnetic pump 5 is instantaneously supplied in a large amount into the combustion device 6. When a large amount of liquid fuel is supplied, the balance between the liquid fuel and air is lost, abnormal combustion occurs, and there are problems such as standing flame, white smoke, and odor.
[0008]
The present invention has been made to solve the above-described problems. Even when the liquid fuel in the oil receiving tray is in a reduced state or an empty state, the suction of air is prevented and the liquid fuel is excessively projected. An object of the present invention is to provide a liquid fuel combustion apparatus capable of preventing flames, white smoke, and odor and performing good combustion.
[0009]
[Means for Solving the Problems]
The present invention includes an oil tray that stores and holds liquid fuel, and an electromagnetic pump that pumps up the liquid fuel in the oil tray and supplies it to a combustion device through an oil feeding pipe. The electromagnetic pump is a pipe that forms a flow path for liquid fuel. Body, a discharge valve arranged at the top, a plunger that moves up and down with a suction valve at the bottom, and a suction pipe that is arranged at the bottom of the pipe and sucks up liquid fuel in the oil pan from the suction port at the lower end. A liquid fuel combustion apparatus, wherein a bypass hole is provided in the side wall near the suction port of the suction passage of the suction pipe so as to be close to the suction port, and when the oil level in the oil pan is located below the bypass hole, Air is sucked into the suction flow path from the bypass hole, and liquid fuel is sucked into the suction flow path from the suction port to prevent a sudden inflow of air into the suction pipe .
[0010]
In addition, the opening area of the bypass hole is made smaller than the opening area of the suction port of the suction pipe.
Furthermore, the inner diameter of the suction flow path of the suction pipe from the suction port to the vicinity of the bypass hole was made smaller than the inner diameter of other portions .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
1 is a longitudinal sectional view showing a configuration of an intake pipe of a liquid fuel combustion apparatus according to Embodiment 1 of the present invention. The configuration of the liquid fuel combustion apparatus is substantially the same as that of the conventional example shown in FIGS. 6 and 7, and the description thereof is omitted.
21 is a suction flow path of the suction pipe 3, and 21 a is a suction port located at the tip of the suction flow path 21. Reference numeral 22 denotes a small-diameter lateral hole provided in a side portion of the suction pipe 3 in the vicinity of the suction port 21 a, and penetrates the side wall of the suction pipe 3 and the suction flow path 21. When the oil level 23 is positioned below the horizontal hole 22, air is sucked from the horizontal hole 22 and fuel is sucked from the suction port 21 a located at the tip of the suction pipe 3.
[0014]
The operation of the present embodiment configured as described above will be described. When the kerosene runs out and the oil level 23 in the oil pan 2 is positioned below the horizontal hole 22 provided in the vicinity of the suction port 21a of the suction pipe 3, air is sucked from the horizontal hole 22 on the side of the suction pipe 3, Liquid fuel is sucked from the suction port 21a at the tip of the suction pipe 3. In this way, since the suction pipe 3 sucks air and liquid fuel at the same time, the air is gradually sucked, and the liquid fuel flowing into the burner is gradually reduced, and combustion is automatically performed by the flame detection provided in the burner. Stop. Therefore, it is possible to prevent the rapid inflow of liquid fuel into the burner caused by sucking air at a stretch.
[0015]
When air is simultaneously sucked from the horizontal hole 22 of the suction pipe 3 and liquid fuel is sucked simultaneously from the suction port 21a of the suction pipe 3, a large amount of air is sucked due to the difference in specific gravity between air and liquid fuel. Therefore, the inner diameter D 2 of the transverse hole 22 of the suction pipe 3 is formed smaller than the inner diameter D 1 of the inlet 21a, it is possible to prevent air from being sucked into a large amount than the liquid fuel.
[0016]
[Embodiment 2]
2 is a longitudinal sectional view showing the configuration of the suction pipe of the liquid fuel combustion apparatus according to Embodiment 2 of the present invention, and FIG. 3 is a longitudinal sectional view for explaining the operation of FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted (the same applies hereinafter).
Reference numeral 24 denotes a thin notch provided in the side area near the suction port 21a from the suction port 21a of the suction pipe 3 to connect the side wall of the suction pipe 3 and the suction flow path 21.
[0017]
The operation of the present embodiment configured as described above will be described. FIG. 2 shows that even if the oil level 23 is lower than the cut hole 24 provided on the side of the suction pipe 3, the upper end of the cut hole 24 is blocked by the liquid fuel due to the surface tension of the liquid fuel. A state where air has not yet been sucked into the suction channel 21 is shown. In FIG. 3, the surface tension around the cut hole 24 is smaller than the fuel suction pressure by the electromagnetic pump 5, and the upper portion of the cut hole 24 is in the open state 24 a so that air is sucked into the suction flow path 21. This shows the state.
[0018]
Thus, when the oil level 23 reaches the position shown in FIG. 3, the suction pipe 3 sucks air and fuel at the same time, so that the air is gradually sucked, and the fuel flowing into the burner is gradually reduced to the burner. Combustion is automatically stopped by the flame detection provided. Accordingly, it is possible to prevent a rapid inflow of fuel into the burner caused by sucking air at a stretch.
[0019]
The surface tension around the notch hole 24 of the suction pipe 3 becomes smaller than the fuel suction pressure of the electromagnetic pump 5, and an open state 24 a is formed above the notch hole 24, so that air enters the suction channel 21. When inhaling, a large amount of air is inhaled due to the difference in specific weight between air and liquid fuel. Therefore, the area S 2 of the notch hole 24 in the case where In the open state 24a draws air, by forming smaller than the area S 1 of the suction port 21a, the intake air is sucked into a large amount than the liquid fuel Can be prevented.
[0020]
[Embodiment 3]
FIG. 4 is a longitudinal sectional view showing the configuration of the lower end of the suction pipe of the liquid fuel combustion apparatus according to Embodiment 3 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the present embodiment, which has an intake passage 21 leading to the suction port 21a and a flow path in the vicinity of the lateral hole 22 described in Embodiment 1 and the reduced diameter channel 21b, the inner diameter D 1, The diameter is smaller than the inner diameter D 3 of the suction flow channel 21 located above the suction flow path 21.
[0021]
According to the present embodiment configured as described above, the flow rate of the sucked fuel in the reduced diameter flow path 21 portion of the suction pipe 3 whose inner diameter is D 1 is increased, and the bubbles of the intake air from the side of the suction pipe 3 are reduced. Inhalation can be performed while maintaining the diameter as it is, and since large bubbles grow in the flow path of the electromagnetic pump 5, it is possible to prevent a decrease in the inflow of fuel.
[0022]
[Embodiment 4]
FIG. 4 is a longitudinal sectional view showing the configuration of the lower end of the suction pipe of the liquid fuel combustion apparatus according to Embodiment 4 of the present invention. The same parts as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted. In the present embodiment, which has a suction channel leading to the suction port 21a and a flow path in the vicinity of the notch hole 24 shown in Embodiment 2 and the reduced diameter channel 21b, the inner diameter D 1, The diameter is smaller than the inner diameter D 3 of the suction flow channel 21 located above the suction flow path 21.
[0023]
According to this embodiment constructed as described above, the inner diameter is faster the flow rate of intake fuel of the reduced diameter channel 21b portion of the intake pipe 3 is D 1, as the bubbles of the intake air from the intake pipe 3 side Can be sucked in while maintaining the diameter of the gas, and grows into large bubbles in the flow path of the electromagnetic pump 5, thereby preventing a decrease in the inflow of fuel.
[0024]
【The invention's effect】
As is clear from the above description, according to the liquid fuel combustion apparatus of the present invention, the liquid fuel is reduced by the inflow of air into the electromagnetic pump when the fuel in the oil pan is reduced or pumped from an empty state. It is possible to prevent standing flames, white smoke, and odor due to excessive protrusion and to perform good combustion.
More details are as follows.
[0025]
The present invention includes an oil receiving tray that stores and holds liquid fuel, and an electromagnetic pump that pumps up the liquid fuel in the oil receiving tray and supplies it to a combustion device through an oil feed pipe, and the electromagnetic pump forms a flow path for the liquid fuel. It consists of a pipe body, a discharge valve arranged at the top, a plunger that moves up and down with a suction valve at the bottom, and a suction pipe that is arranged at the bottom of the pipe and sucks up the liquid fuel in the oil pan from the suction port at the lower end. A liquid fuel combustion apparatus, wherein a bypass hole is provided in the side wall near the suction port of the suction channel of the suction pipe so as to be close to the suction port, and the oil level in the oil tray is located below the bypass hole. is air sucked into the suction flow path from the bypass hole, the liquid fuel is sucked into the suction flow path from the suction port. Thus to prevent inflow of sudden air to the suction pipe, the one gas I don't breathe in air .
[0026]
Further, since the opening area of the bypass hole is made smaller than the opening area of the suction port of the suction pipe, it is possible to prevent the intake air amount from being sucked in larger than the suction amount of the liquid fuel.
Furthermore, since the inner diameter of the suction flow path of the suction pipe from the suction port to the vicinity of the bypass hole is smaller than the inner diameter of the other part, the flow rate of the fuel in the reduced diameter part is increased, and the air sucked from the side part It is possible to hold the bubbles with the same diameter.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of a second embodiment of the present invention.
FIG. 3 is an operation explanatory diagram of Embodiment 2 of the present invention.
FIG. 4 is a longitudinal sectional view of Embodiment 3 of the present invention.
FIG. 5 is a longitudinal sectional view of a fourth embodiment of the present invention.
FIG. 6 is a longitudinal sectional view showing an example of a conventional liquid fuel combustion apparatus.
7 is a longitudinal sectional view showing the main part of FIG.
[Explanation of symbols]
2 oil pan 3 inhalation pipe, 4 oil feeding pipe, 5 electromagnetic pump, 6 a combustion device, 7 tube, 8 ejection off valve, 9 suction valve, 10 a plunger, 21 intake passage, 21a inlet, 21b contraction diameter flow Road, 22 Side hole, 24 Cut hole, 24a Open state of cut hole.

Claims (3)

液体燃料を貯え保有する油受皿と、該油受皿内の液体燃料をくみ上げ送油パイプを通して燃焼装置に供給する電磁ポンプとを備え、該電磁ポンプは、液体燃料の流路を形成する管体、その上部に配された吐出弁、その下部に吸入弁を配して上下動するプランジャー、及び前記管体下部に配置され下端の吸入口から前記油受皿の液体燃料を吸い上げる吸入パイプから構成される液体燃料燃焼装置であって、
前記吸入パイプの吸入流路の吸入口近傍の側壁に該吸入口に近接させてバイパス穴を設け、前記油受皿内の油面が前記バイパス穴よりも下方に位置したとき、該バイパス穴から前記吸入流路内に空気が吸入され、前記吸入口から前記吸入流路内に液体燃料が吸入されて、前記吸入パイプへの急激な空気の流入を防止することを特徴とする液体燃料燃焼装置。
An oil receiver that stores and holds liquid fuel, and an electromagnetic pump that pumps up the liquid fuel in the oil receiver and supplies it to the combustion device through an oil feed pipe, the electromagnetic pump forming a tube that forms a flow path for the liquid fuel, It is composed of a discharge valve arranged at the top, a plunger that moves up and down with a suction valve at the bottom, and a suction pipe that is arranged at the bottom of the tube and sucks up the liquid fuel in the oil pan from the suction port at the lower end. A liquid fuel combustion device,
A bypass hole is provided in the side wall in the vicinity of the suction port of the suction channel of the suction pipe so as to be close to the suction port , and when the oil level in the oil tray is positioned below the bypass hole, A liquid fuel combustion apparatus , wherein air is sucked into a suction flow path, and liquid fuel is sucked into the suction flow path from the suction port to prevent a sudden flow of air into the suction pipe .
前記バイパス穴の開口面積を、吸入パイプの吸入口の開口面積よりも小さくしたことを特徴とする請求項1記載の液体燃料燃焼装置。  2. The liquid fuel combustion apparatus according to claim 1, wherein an opening area of the bypass hole is smaller than an opening area of the suction port of the suction pipe. 前記吸入口からバイパス穴近傍に至る吸入パイプの吸入流路の内径を他の部分の内径よりも縮径したことを特徴とする請求項1記載の液体燃料燃焼装置。  2. The liquid fuel combustion apparatus according to claim 1, wherein an inner diameter of the suction flow path of the suction pipe extending from the suction port to the vicinity of the bypass hole is smaller than the inner diameter of other portions.
JP2001079751A 2001-03-21 2001-03-21 Liquid fuel combustion equipment Expired - Fee Related JP3937387B2 (en)

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JP2002276928A5 JP2002276928A5 (en) 2005-10-20
JP3937387B2 true JP3937387B2 (en) 2007-06-27

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