JPS60122821A - Liquid fuel combustion apparatus - Google Patents

Abstract

PURPOSE:To contrive to obtain stabilized ignition by increasing the rate of feed oil by increasing the pressure in the pressure chamber of a constant-level regulator higher than the time of normal combustion at the time of ignition, in a liquid fuel combustion apparatus. CONSTITUTION:When a switch 10 is closed, an ignition circuit 11 and a combustion circuit 12 are picked up and at the same time a solenoid valve 9 provided in a pressure chamber 7 is closed, and the feed air pressure applied to a constant-level regulator 3 is increased higher than the time of normal combustion. The open area of a constant-level regulator 3 is determined so that the ratio of combustion air and liquid fuel becomes optimum at the time of ignition when the solenoid valve 9 is closed. A combustion detecting circuit 13 senses the state of combustion, actuating a realy 14, opening a contact point 15 to open the solenoid valve 9, and then normal combustion starts.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は灯油等を燃料とした液体燃料燃焼装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid fuel combustion device using kerosene or the like as fuel.

従来例の構成とその問題点 従来の液体燃料燃焼装置、例えば灯油を燃料とする温風
暖房機は、第１図に示すように、気化燃焼部Ａとこの気
化燃焼部Ａに燃料を供給する送油管Ｂと、この送油管Ｂ
に燃料を供給する定油面器Ｃと、前記気化燃焼部Ａに燃
焼用空気を供給する燃焼用送風機りと、前記送風機りか
ら気化燃焼部Ａまでの送風路Ｅと定油面器Ｃの加圧室Ｆ
とを連通ずる加圧管Ｇとからなっている。そしてこの構
成によれば、気化燃焼部Ａに送られる燃焼用空気の量に
比例して燃料が供給されることになり、空燃比がほぼ一
定に維持できる利点がある。すなわち送風機りから供給
される空気の一部は定油面器Ｃに加わって定油面器Ｃ内
の油を押し出すから、送風量が増えれば油も増大し、送
風量が減少すれば油も減少してその比はほぼ一定に保た
れるのである。しかしながら、その比は定常燃焼中にお
いて最適燃焼を行なうように設定されているため、着火
時において、前記送油管Ｂの温度が、定常燃焼中の温度
よりも低い場合には、送油管Ｂ内における灯油の粘性抵
抗の増加のため、灯油供給量の低下をまねき、空燃比の
バランスがくずれ、空気過多による着火不良を生じたり
するという問題点があった。また、この問題点は、低温
の場合には前記送油管Ｂにおける灯油の粘性抵抗の増加
による灯油供給量の低下や、前記送風路Ｅ内を通過する
燃焼用空気の密度の上昇により、さらに顕著に表われる
ことになる。Structure of the conventional example and its problems A conventional liquid fuel combustion device, for example, a hot air heater that uses kerosene as fuel, has a vaporization combustion section A and fuel is supplied to the vaporization combustion section A, as shown in Fig. 1. Oil pipe B and this oil pipe B
a combustion blower supplying combustion air to the vaporization and combustion section A; a blower path E from the blower to the vaporization and combustion section A; Pressurized chamber F
It consists of a pressure tube G that communicates with the According to this configuration, fuel is supplied in proportion to the amount of combustion air sent to the vaporization combustion section A, and there is an advantage that the air-fuel ratio can be maintained substantially constant. In other words, a part of the air supplied from the blower is added to the leveling device C and pushes out the oil in the leveling device C, so if the amount of air blown increases, the oil will also increase, and if the amount of air blown decreases, the oil will also increase. The ratio decreases and remains almost constant. However, since the ratio is set to perform optimal combustion during steady combustion, if the temperature of the oil pipe B at the time of ignition is lower than the temperature during steady combustion, the temperature inside the oil pipe B The increase in viscous resistance of kerosene leads to a decrease in the amount of kerosene supplied, causing an imbalance in the air-fuel ratio and causing ignition failure due to excess air. Furthermore, this problem becomes more noticeable at low temperatures due to a decrease in the amount of kerosene supplied due to an increase in the viscous resistance of the kerosene in the oil pipe B, and an increase in the density of the combustion air passing through the air passage E. It will appear in

発明の目的 本発明は上記問題点に鑑みてなしたもので、液体燃料燃
焼装置の着火の安定性を確保することを目的としたもの
である。OBJECT OF THE INVENTION The present invention was made in view of the above-mentioned problems, and an object of the present invention is to ensure stability of ignition in a liquid fuel combustion device.

発明の構成 上記目的を達成するため、本発明は燃料を供給する定油
面器の加圧室あるいは、燃焼用空気を供給する送風路と
前記定油面器の加圧室とを連通ずる加圧管のいずれかに
大気と連通する開口部を設け、さらに、この開口部を開
閉する開閉器と、この開閉器を開閉制御する制御手段を
設け、前記制御手段は気化燃焼部の燃焼を検出して開閉
器を開成するように設定してあり、したがって、着火時
には、定油面器の加圧室内の圧力が、通常燃焼中よりも
高められ、これにより送油量が増加し空気量とのバラン
スがとれ、安定した着火が得られるようになっている。Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a pressure chamber of the oil level regulator that supplies fuel or a pressurization chamber that communicates the air blow path that supplies combustion air with the pressure chamber of the oil level regulator. An opening communicating with the atmosphere is provided in one of the pressure pipes, and a switch for opening and closing this opening and a control means for controlling opening and closing of the switch are provided, and the control means detects combustion in the vaporization combustion section. Therefore, at the time of ignition, the pressure in the pressurizing chamber of the oil level regulator is higher than during normal combustion, which increases the amount of oil fed and increases the amount of air. It is well balanced and provides stable ignition.

実施例の説明 以下その一実施例を第２図、第３図を用いて説明する。Description of examples An example of this will be described below with reference to FIGS. 2 and 3.

第２図において、１は液体燃料を気化燃焼する気化燃焼
部、２は上記気化燃焼部１に燃料を供給する送油管、３
は上記送油管２に燃料を供給する定油面器、４は上記気
化燃焼部１に燃焼用空気を供給する燃焼用送風機、６は
上記送風機４から気化燃焼部１に燃焼用空気を導く送風
管、６は上記送風管５と定油面器３の加圧皇子を連通ず
る加圧管であり、上記定油面器３の加圧室７には大気に
連通ずる開口部８と、この開口部を開閉する開閉器とし
て電磁弁９が設けである。この電磁弁９は、上記気化燃
焼部において、燃焼が検出された場合に開成するように
なっている。第３図は上記電磁弁９を駆動する制御回路
を示したもので、第２図と同じく９は電磁弁を示し、１
ｏはスイッチ、１１は点火回路、１２は燃焼回路、１３
は燃焼検出回路、１４はリレーのコイル、１５番よりレ
ーの接点である。In FIG. 2, 1 is a vaporization combustion section that vaporizes and burns liquid fuel, 2 is an oil pipe that supplies fuel to the vaporization and combustion section 1, and 3
4 is a combustion blower that supplies combustion air to the vaporization and combustion section 1; 6 is a blower that guides the combustion air from the blower 4 to the vaporization and combustion section 1; The pipe 6 is a pressurizing pipe that communicates the blower pipe 5 with the pressurizing tube of the oil level regulator 3, and the pressurizing chamber 7 of the oil level regulator 3 has an opening 8 that communicates with the atmosphere, and this opening. A solenoid valve 9 is provided as a switch for opening and closing the section. This electromagnetic valve 9 is opened when combustion is detected in the vaporization combustion section. FIG. 3 shows a control circuit for driving the solenoid valve 9, in which 9 indicates a solenoid valve as in FIG. 2, and 1
o is a switch, 11 is an ignition circuit, 12 is a combustion circuit, 13
14 is the combustion detection circuit, 14 is the coil of the relay, and 15 is the contact point of the relay.

上記構成において、スイッチ１０を入れると、点火回路
１１、および燃焼回路１２が働き、同時に、上記加圧室
７に設けた電磁弁９が閉成される。In the above configuration, when the switch 10 is turned on, the ignition circuit 11 and the combustion circuit 12 are activated, and at the same time, the electromagnetic valve 9 provided in the pressurizing chamber 7 is closed.

すなわち着火動作に入り、燃焼を開始する。そして燃焼
検出回路１３がその燃焼を検出してリレー１４を作動さ
せ、接点１５を開いて電磁弁９を開成する。すなわち定
常燃焼に入る。That is, it enters the ignition operation and starts combustion. Then, the combustion detection circuit 13 detects the combustion and operates the relay 14, which opens the contact 15 and opens the solenoid valve 9. In other words, it enters steady combustion.

ここで上記電磁弁９が開成されている場合には、送風管
５にて供給される燃焼用空気の量と、上記開口部８の開
口面積により設定される上記加圧室７の燃焼用空気圧力
による液体燃料の供給量とか最適な割合になるように設
定されており、通常は従来例で述べたのと同様の動作で
燃料と空気との比、すなわち、空燃比が一定に保たれ、
良好な燃焼を行なう。Here, when the solenoid valve 9 is opened, the combustion air in the pressurizing chamber 7 is determined by the amount of combustion air supplied through the blast pipe 5 and the opening area of the opening 8. The amount of liquid fuel supplied by pressure is set to the optimum ratio, and normally the ratio of fuel to air, that is, the air-fuel ratio, is kept constant by the same operation as described in the conventional example.
Produce good combustion.

一万、着火時においては、電磁弁９は閉成されており、
定油面器３に加わる送風圧は、前述の通常燃焼中の場合
よりも増大される。そして、この電磁弁９が閉成される
着火時においても、その燃焼用空気の量と、液体燃料と
の比が最適になるように、その開口面積は設定されてい
る。10,000, At the time of ignition, the solenoid valve 9 is closed,
The blowing pressure applied to the oil level regulator 3 is increased compared to the case during normal combustion described above. The opening area is set so that the ratio between the amount of combustion air and the liquid fuel is optimal even during ignition when the solenoid valve 9 is closed.

したがって、着火時において、上記気化燃焼部１におけ
る空燃比が最適に保たれ、常に安定した着火を確保でき
るという効果がある。Therefore, at the time of ignition, the air-fuel ratio in the vaporization combustion section 1 is maintained optimally, and stable ignition can always be ensured.

なお、上記実施例では、加圧室に開口部を設けたが、こ
れを加圧管に設けてもよいものである。In the above embodiment, the pressurizing chamber is provided with an opening, but this may also be provided in the pressurizing pipe.

発明の効果 このように本発明によれば、着火時における燃焼用空気
の量と液体燃料の量との割合を適当ｌこ保つことができ
、安定した着火が可能となり、異常燃焼等を防ぐことが
できるといった燃焼の安定性向上に大きな効果がある。Effects of the Invention As described above, according to the present invention, the ratio between the amount of combustion air and the amount of liquid fuel at the time of ignition can be maintained at an appropriate level, making stable ignition possible and preventing abnormal combustion. This has a great effect on improving combustion stability.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来例における概略構成説明図、第２図は本発
明の一実施例における概略構成説明図、臼 第３図は第２図の実施例における制御回路！ある。 １・・・・・・気化燃焼部、２・・・・・・送油管、３
・・・・・・定油面器、４・・・・・・燃焼用送風機、
６・・・・・・送風路、６・・・・・・加圧管、７・・
・・・・加圧室、８・・・・・・開口部、９・・・・・
・開閉器としての電磁弁。Fig. 1 is a schematic structural explanatory diagram of a conventional example, Fig. 2 is a schematic structural explanatory diagram of an embodiment of the present invention, and Fig. 3 is a control circuit in the embodiment of Fig. 2! be. 1... vaporization combustion section, 2... oil pipe, 3
・・・・・・Fixed oil leveler, ４・・・・・・Combustion blower,
6... Air duct, 6... Pressure pipe, 7...
...pressure chamber, 8...opening, 9...
- Solenoid valve as a switch.

Claims (1)

【特許請求の範囲】[Claims] 液体燃料を気化燃焼する気化燃焼部と、この気化燃焼部
に燃料を供給する送油管と、この送油管に燃料を供給す
る定油面器と、上記気化燃焼部に燃焼用空気を供給する
燃焼用送風機と、上記送風機から気化燃焼部までの送風
路と定油面器の加圧室とを連通ずる加圧管と、上記加圧
室あるいは、上記加圧管のいずれかに設けた大気と連通
ずる開口部と、この開口部を開閉する開閉器と、上記気
化燃焼部の燃焼を検知して、上記開閉器を開成制御する
制卸手段とを備えた液体燃料燃焼装置。A vaporization combustion section that vaporizes and burns liquid fuel, an oil supply pipe that supplies fuel to this vaporization and combustion section, a constant oil level device that supplies fuel to this oil supply pipe, and a combustion system that supplies combustion air to the vaporization and combustion section. an air blower, a pressurizing pipe that communicates the air passage from the blower to the vaporizing combustion section and the pressurizing chamber of the oil level regulator, and a pressurizing pipe that communicates with the atmosphere provided in either the pressurizing chamber or the pressurizing pipe. A liquid fuel combustion device comprising an opening, a switch that opens and closes the opening, and a control means that detects combustion in the vaporization combustion section and controls opening of the switch.