JPH01305254A - Combustion capacity switching mechanism - Google Patents
Combustion capacity switching mechanismInfo
- Publication number
- JPH01305254A JPH01305254A JP13280688A JP13280688A JPH01305254A JP H01305254 A JPH01305254 A JP H01305254A JP 13280688 A JP13280688 A JP 13280688A JP 13280688 A JP13280688 A JP 13280688A JP H01305254 A JPH01305254 A JP H01305254A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- capacity
- capacity switching
- combustors
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- 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.)
- Pending
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 88
- 239000000203 mixture Substances 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 15
- 230000000694 effects Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- Regulation And Control Of Combustion (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、湯沸器特に大型湯沸器に用いられる燃焼器の
燃焼能力切替機構に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combustion capacity switching mechanism for a combustor used in a water heater, particularly a large water heater.
湯沸器特に大型湯沸器に用いられる燃焼器は、出湯温度
を出湯量に応じて制御するために、その燃焼能力を、バ
ーナの燃焼本数を切り替えることにより数段階に切り替
える必要があるが、従来の湯沸器においては、２〜３段
階程度の狭い範囲の自動切替能力しか備えられていなか
った。Combustors used in water heaters, especially large water heaters, need to switch their combustion capacity into several stages by changing the number of burners in order to control the temperature of the hot water depending on the amount of hot water. Conventional water heaters have only been equipped with automatic switching capabilities within a narrow range of about two to three stages.
また、特に強制通風式〇湯沸器におけるガス圧と空気供
給量との関係を制御して燃焼能力切替時に安定した着火
を図るための機構が無く、ガス圧を安定させる機構も無
かった。In addition, there was no mechanism to control the relationship between gas pressure and air supply in forced draft water heaters to achieve stable ignition when switching combustion capacity, and there was no mechanism to stabilize gas pressure.
［発明が解決しようとする課題］
上記従来の湯沸器の燃焼器においては、燃焼能力の切替
可能な段階が少なく、適切な燃焼能力を選択することが
困難であり、不適切な燃焼能力を採用せざるを得ないと
いう問題があった。[Problems to be Solved by the Invention] In the conventional water heater combustor described above, there are few stages in which the combustion capacity can be switched, and it is difficult to select an appropriate combustion capacity. There was a problem that we had no choice but to hire them.
また、強制通風式の湯沸器において、燃焼能力切替時の
燃焼用空気の供給量とガス圧が制御■されていないため
に、火移り不良や、火炎の脈動、逆火等を生しやすいと
いう問題があった。In addition, in forced draft water heaters, the amount of combustion air supplied and gas pressure are not controlled when the combustion capacity is switched, which tends to cause problems such as poor flame transfer, flame pulsation, and backfire. There was a problem.
さらに、複数の能力切替弁を同時に切り替える場合には
、ガス圧の変動が大きく、またその変動の傾向が一定・
せず、場合によって異なるため、円滑な燃焼能力切替が
困難であるという問題があった。Furthermore, when switching multiple capacity switching valves at the same time, the gas pressure fluctuates greatly, and the tendency of the fluctuation is constant.
There was a problem in that it was difficult to smoothly switch the combustion capacity because the combustion capacity did not change depending on the case.
本発明は、上記問題点を解決し、切替可能な燃焼能力の
段階を多くすることにより、適切な燃焼能力を容易に選
択することができるようにするとともに、燃焼能力切替
時の燃焼用空気の供給量とガス圧を制御し７て安定した
点火状態を確保し、燃焼能力切替時のガス圧変動を小さ
くして円滑な燃焼能力切替を行うことを目的とする。The present invention solves the above-mentioned problems, and by increasing the number of switchable combustion capacity stages, it becomes possible to easily select an appropriate combustion capacity, and the combustion air at the time of switching the combustion capacity is increased. The purpose is to ensure a stable ignition state by controlling the supply amount and gas pressure, and to reduce fluctuations in gas pressure at the time of combustion capacity switching to perform smooth combustion capacity switching.
［課題を解決するための手段］
上記目的を達成するために、本発明の燃焼能力切替機構
は、多数本の燃焼管から成る燃焼装置において、それぞ
れ所定の本数の燃焼管から成る燃焼器を中央とその両側
に配置便シて燃焼装置を構成し、両側の燃焼器にそれぞ
れ能力切替弁を接続するとともに、初期着火時に中央の
燃焼器に点火して常時燃焼させておき、両側の燃焼器に
火移りさせるものである。[Means for Solving the Problems] In order to achieve the above object, the combustion capacity switching mechanism of the present invention provides a combustion capacity switching mechanism of the present invention, in which the combustors each consisting of a predetermined number of combustion tubes are centrally connected to each other in a combustion device consisting of a large number of combustion tubes. The combustor is placed on both sides to form a combustion device, and a capacity switching valve is connected to each combustor on both sides, and at the time of initial ignition, the central combustor is ignited for constant combustion, and It causes fire to spread.
また、通常燃焼中の能力切替時におけるガスと燃焼用空
気との混合比を、ガス圧の調整と給気用ファンの回転数
の制御とによって初期着火時において行われる緩点火と
同じ混合比とし、給気用ファンの回転数が緩点火状態に
あることを確認してから能力切替を行うと良い。In addition, the mixture ratio of gas and combustion air at the time of capacity switching during normal combustion is set to the same mixture ratio as the slow ignition that occurs during initial ignition by adjusting the gas pressure and controlling the rotation speed of the air supply fan. It is best to switch the capacity after confirming that the rotational speed of the air supply fan is in a slow ignition state.
さらに、略同しタイミングで切替動作を行う必要のある
複数の能力切替弁を所定時間（例えば２秒間）の範囲内
でずらせて動作さ−ぜるごとか好ましい。Furthermore, it is preferable to operate a plurality of capacity switching valves that need to be switched at approximately the same timing by shifting them within a predetermined time range (for example, 2 seconds).
（作用）
上記のように構成された燃焼能力切替機構は、初期着火
時においてガスと燃焼用空気との混合比を緩点火状態と
して中央の燃焼器に点火し、通常燃焼中は常時燃焼させ
ておき、能力切替弁を作動させることによって両側の燃
焼器にガスを供給して火移りさせ、能力切替弁の開閉状
態の組み合わせにより燃焼能力が４段階に切り替えられ
る。(Function) The combustion capacity switching mechanism configured as described above ignites the central combustor with the mixture ratio of gas and combustion air in a slow ignition state at the time of initial ignition, and constantly burns during normal combustion. Then, by operating the capacity switching valves, gas is supplied to the combustors on both sides to transfer the flame, and the combustion capacity is switched into four stages by combining the opening and closing states of the capacity switching valves.
また、ｊｍ常燃焼中の能力切替時には、ガス圧の調整と
給気用ファンの回転数の制御部ぢ燃焼用空気の制御とに
よ、２て初期着火時において行われる緩点火と同じ混合
比とし７、給気用ファンの回転数即ち燃焼用空気針が緩
点火状態にあることを確認してから能力切替を行う。In addition, when switching the capacity during normal combustion, the mixture ratio is the same as the slow ignition performed during initial ignition by adjusting the gas pressure and controlling the rotation speed of the air supply fan. 7. After confirming that the rotational speed of the air supply fan, that is, that the combustion air needle is in a slow ignition state, the capacity is switched.
そして、両側の燃焼器にそれぞれ接続された能力切替弁
は略同じタイミングで切替動作を行う必要があるが、所
定時間（例えば２秒間）の範囲内でずらせて動作させる
ことにより、弁の開閉によるガス通路内の微小時間に生
じるガスの圧力変動を小さくする。The capacity switching valves connected to the combustors on both sides must perform switching operations at approximately the same timing, but by staggered operation within a predetermined time range (for example, 2 seconds), it is possible to change the switching operation by opening and closing the valves. To reduce gas pressure fluctuations that occur in the gas passage over a short period of time.
（実施例） 本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described based on the drawings.
第１図において、湯沸器ｌの上方に熱交換器１１が設は
ラフれ、下方には燃焼装置２が設置されており、燃焼装
置２の下方に給気用ファン３を有する吸気路４がもうけ
られ、燃焼装置２の直］二には点火器５と燃焼検出器６
が配置されている。In FIG. 1, a heat exchanger 11 is installed above a water heater l, a combustion device 2 is installed below, and an intake path 4 having an air supply fan 3 is installed below the combustion device 2. An igniter 5 and a combustion detector 6 are installed directly on the combustion device 2.
is located.
燃焼装置２は、中央に５本の燃焼管から成る第１燃焼器
２１が設置され、その両側に、４木の燃焼管から成る第
２燃焼器２２と１１本の燃焼管から成る第３燃焼器２３
とがそれぞれ配置されて形成されており、中央の第１燃
焼器２１の直」二に点火器５が位置している。The combustion device 2 has a first combustor 21 consisting of five combustion tubes installed in the center, and on both sides thereof a second combustor 22 consisting of four combustion tubes and a third combustion chamber consisting of 11 combustion tubes. Vessel 23
The igniter 5 is located directly opposite the first combustor 21 in the center.
第１燃焼器２１には第１ガス供給路７１が、第２燃ｍ器
２２には第２ガス供給路７２が、第３燃焼器２３には第
３ガス供給路７３がそれぞれ接続されており、第１乃至
第３ガス供給路７１〜７３は、ガス通路７端に形成され
た室７４内に連通開口されている。A first gas supply passage 71 is connected to the first combustor 21, a second gas supply passage 72 is connected to the second combustor 22, and a third gas supply passage 73 is connected to the third combustor 23. , the first to third gas supply passages 71 to 73 are opened to communicate with a chamber 74 formed at the end of the gas passage 7.
室７４の」二流側のガス通路７に、上流側から順に元ガ
ス電磁弁８、緊急ガス電磁弁９及び比例弁１０が設けら
れており、室７４内の第２ガス供給路７２の開口には能
力切替弁１１が設＋）られ、同じく第３ガス供給路７３
の室７４内の開口には能力切替弁１２が設けられている
。A source gas solenoid valve 8 , an emergency gas solenoid valve 9 , and a proportional valve 10 are provided in the gas passage 7 on the second flow side of the chamber 74 in this order from the upstream side. The capacity switching valve 11 is installed +), and the third gas supply path 73 is also installed.
A capacity switching valve 12 is provided at the opening in the chamber 74 .
次に動作について説明する。Next, the operation will be explained.
初期着火時においては、元ガス電磁弁８と緊急ガス電磁
弁９を開き、比例弁１０と給気用ファン３の制御により
ガスと燃焼用空気との混合比を緩点火状態の着火し易い
状態にして中央の第１燃焼２ｍ２１に点火する。この時
、能力切替弁１１及び１２は閉止状態にある。At the time of initial ignition, the source gas solenoid valve 8 and the emergency gas solenoid valve 9 are opened, and the mixture ratio of gas and combustion air is controlled by the proportional valve 10 and the air supply fan 3 to a slow ignition state that facilitates ignition. and ignite the first combustion 2m21 in the center. At this time, the capacity switching valves 11 and 12 are in a closed state.
通常燃焼中は第１燃焼器２１を常時燃焼させておき、能
力切替弁１１及び１２を開閉させることによって両側の
第２及び第３燃焼器２２．２３にガスを供給して火移り
さゼ、能力切替弁１１及び１２の開閉状態の組み合わせ
により燃焼能力が４段階に切り替えられる。即ち、第１
燃焼器２１のみが燃焼している能力小の状態（能力切替
弁１１及び１２は閉止）、第１燃焼器２１及び第２燃焼
器２２が燃焼している能力中（小）の状Ｂ（能力切替弁
１１は開放、能力切替弁１２は閉止）、第１燃焼器２１
及び第３燃焼器２３が燃焼している能力中（大）の状Ｂ
（能力切替弁１１は閉止、能力切替弁１２は開放）、第
１乃至第３に！８焼器２１〜２３が燃焼している能力大
の状態（能力切替弁１１及び１２は開放）の４段階であ
る。During normal combustion, the first combustor 21 is kept in constant combustion, and by opening and closing the capacity switching valves 11 and 12, gas is supplied to the second and third combustors 22 and 23 on both sides to move the fire. Combustion capacity is switched into four stages by a combination of opening and closing states of capacity switching valves 11 and 12. That is, the first
A low capacity state where only the combustor 21 is burning (capacity switching valves 11 and 12 are closed), a medium (low) capacity state where the first combustor 21 and the second combustor 22 are burning (capacity B) switching valve 11 is open, capacity switching valve 12 is closed), first combustor 21
and medium (large) capacity state B where the third combustor 23 is burning
(Capacity switching valve 11 is closed, capacity switching valve 12 is open), first to third! There are four stages: a state where the eight burners 21 to 23 are in a high capacity state (capacity switching valves 11 and 12 are open);
以下に各段階の燃焼能力と各電磁弁開閉動作の一覧表を
示す。Below is a list of the combustion capacity of each stage and the opening/closing operation of each solenoid valve.
このように、２個の能力切替弁のみの切替で４段階の燃
焼能力切替を容易に行うことができる。In this way, four stages of combustion capacity switching can be easily performed by switching only two capacity switching valves.
また、通常燃焼中に行われる能力切替時においては、第
２図及び第３図に示されるように、要求される出湯能力
即ち湯沸器の号数を演算し、その結果により燃焼装置２
の能力即ち燃焼管本数の切替が必要か否かを判定し、不
要の場合は号数に応じて比例弁１０及び給気用ファン３
を制御して燃焼量を調節する。燃焼管本数の切替が必要
とされた場合は、比例弁ｌＯによるガス圧の調整と給気
用ファン３の回転数の制御即ち燃焼用空気量の制御とに
よって、第４図において、通常燃焼に適しているガス圧
（Ｐ２）−給気用ファン３の回転＃！ｌ（ｒｐｍ）曲線
上よりもガス圧（Ｐ２）が高い方向にずれたＱ点に示さ
れる初期着火時において行われる緩点火と同じ混合比と
なるようにし、給気用ファン３の回転数即ち燃焼用空気
量が緩点火状態にあることを確認してから能力切替弁を
開閉して燃焼能力切替を行い、その後は号数に応じて比
例弁１０及び給気用ファン３を制御して燃焼量を調節す
る。In addition, when switching the capacity during normal combustion, as shown in Figures 2 and 3, the required hot water output capacity, that is, the number of the water heater, is calculated, and the result is used to change the combustion device 2.
It is determined whether or not it is necessary to change the capacity of the combustion pipes, that is, the number of combustion pipes, and if it is not necessary, the proportional valve 10 and the supply air fan 3 are
to adjust the amount of combustion. When it is necessary to change the number of combustion tubes, the normal combustion is achieved as shown in Fig. 4 by adjusting the gas pressure using the proportional valve IO and controlling the rotational speed of the air supply fan 3, that is, controlling the amount of combustion air. Suitable gas pressure (P2) - rotation of air supply fan 3 #! The mixture ratio is set to be the same as the slow ignition performed at the time of initial ignition, which is shown at point Q, where the gas pressure (P2) is shifted in a higher direction than on the l (rpm) curve, and the rotation speed of the air supply fan 3, i.e. After confirming that the amount of combustion air is in a slow ignition state, open and close the capacity switching valve to switch the combustion capacity, and then control the proportional valve 10 and the air supply fan 3 according to the number to start combustion. Adjust the amount.
このような能力切替を行うことにより、火移りを確実に
行わせることができ、逆火を防止できるものである。By switching the capacity in this manner, it is possible to ensure that the flame transfer occurs, and it is possible to prevent backfire.
さらに、第２及び第３燃焼器２２．２３にそれぞれ接続
された能力切替弁１１，１２は略同じタイミングで切替
動作を行われる必要があるが、所定時間（例えば２秒間
）の範囲内で互いにずらせて動作させる（例えば、能力
切替弁１１の動作を能力切替弁１２の動作よりも遅らせ
る）ことにより、能力切替弁の開閉によるガス通路内の
微小時間に生じるガスの圧力変動を小さくし、ガスの圧
力変動を小さくすることで火捗りの不良や逆火の発生等
の燃焼に及ぼす影響を小さくすることができる。Furthermore, the capacity switching valves 11 and 12 connected to the second and third combustors 22 and 23, respectively, need to be switched at approximately the same timing, but within a predetermined period of time (for example, 2 seconds) By staggering the operation (for example, delaying the operation of the capacity switching valve 11 from the operation of the capacity switching valve 12), it is possible to reduce the gas pressure fluctuation that occurs in the gas passage in a minute period due to the opening and closing of the capacity switching valve, and to By reducing the pressure fluctuation, it is possible to reduce the effects on combustion such as poor flame development and flashback.
能力切替弁１１の動作を能力切替弁１２の動作よりも遅
延させるようにした燃焼能力切替動作について詳述する
と、燃焼能力を中（小）（能力切替弁１１は開放、能力
切替弁１２は閉止）から中（大）（能力切替弁１１は閉
止、能力切替弁１２は開放）に高める場合、先に能力切
替弁１２を開放し、所定時間（例えば２秒間）の範囲内
で遅らせて能力切替弁１１を閉止する。つまり燃焼管本
数が９本の中（小）状態から一度２０本に増加した後１
６本の中（大）状態になる。この時、−瞬燃焼品が過大
となるが、この場合は出湯温度の上昇を促進することに
なり、出湯温度制御の追従性を高めるものである。The combustion capacity switching operation in which the operation of the capacity switching valve 11 is delayed compared to the operation of the capacity switching valve 12 will be described in detail. ) to medium (large) (capacity switching valve 11 is closed, capacity switching valve 12 is open), the capacity switching valve 12 is opened first, and the capacity is switched after a delay within a predetermined time (for example, 2 seconds). Close valve 11. In other words, once the number of combustion tubes increases from a medium (small) state of 9 to 20, 1
It becomes a medium (large) state of 6. At this time, the instantaneous combustion product becomes excessively large, but in this case, the rise in the tapping temperature is promoted, and the followability of the tapping temperature control is improved.
また、燃焼能力を中（大）（能力切替弁１１は閉止、能
力切替弁１２は開放）から中（小）（能力切替弁１１は
開放、能力切替弁１２は閉止）に低下させる場合、先に
能力切替弁１２を閉止し、所定時間（例えば２秒間）の
範囲内で遅らせて能力切替弁ｉ１を開放する。つまり、
燃焼管本数が１６本の中（大）状態から一度５本に減少
し、その後９本の巾（小）状態になる。In addition, when reducing the combustion capacity from medium (large) (capacity switching valve 11 is closed, capacity switching valve 12 is open) to medium (small) (capacity switching valve 11 is open, capacity switching valve 12 is closed), first The capacity switching valve 12 is closed, and the capacity switching valve i1 is opened after a delay within a predetermined time (for example, 2 seconds). In other words,
The number of combustion tubes decreases from a medium (large) state of 16 to five, and then changes to a width (small) state of nine.
（発明の効果〕
本発明の燃焼能力切替機構は、上述のとおり構成されて
いるから、次のような効果を奏する。(Effects of the Invention) Since the combustion capacity switching mechanism of the present invention is configured as described above, it has the following effects.
特許請求の範囲第１項記載のものは、２個の能力切替弁
により切替可能な燃焼能力の段階を多くすることができ
、適切な燃焼能力を容易に選択することができるもので
ある。The device described in claim 1 can increase the number of stages of combustion capacity that can be switched by two capacity switching valves, and can easily select an appropriate combustion capacity.
特許請求の範囲第２項記載のものは、燃焼能力切替時の
燃焼用空気の供給星とガス圧を制御して安定した火移り
状態を確保し、逆火等を防ぎ、燃焼性能を向上さゼるこ
とができるものである。The invention described in claim 2 secures a stable flame transfer state by controlling the supply star and gas pressure of combustion air when switching combustion capacity, prevents backfire, etc., and improves combustion performance. It is something that can be used.
特許請求の範囲第３項記載のものは、燃焼能力切替時の
ガス圧変動を小さくして安定した火移り状態をｔ′ω保
し、逆火等を防いで円滑な燃焼能力切替を行うことがで
きるものである。What is described in claim 3 is to reduce the gas pressure fluctuation when switching the combustion capacity, maintain a stable flame transfer state t'ω, prevent backfire, etc., and perform smooth combustion capacity switching. It is something that can be done.
第１図は本発明を用いた湯沸器の全体経路図、第２図は
燃焼能力切替時のフローチャー１−５第３図は同じくタ
イムテーブル、第４図は混合比曲線である。
１・・・・湯沸器、
２・・・・燃焼装置、
３・・・・給気用ファン、
５・・・・点火器、
７・・・・ガス通路、
８・・・・元ガス電磁弁、
９・・・・緊急電磁弁、
ＩＯ・・・比例弁、
１１．１２・・・能力切替弁
２１・・・第１燃焼器、
２２・・・第２燃焼器、
２３・・・第３燃焼器、
７１・・・第１ガス供給路、
７２・・・第２ガス供給路、
７３・・・第３ガス供給路、
７４・・・室。FIG. 1 is an overall route diagram of a water heater using the present invention, FIG. 2 is a flow chart 1-5 when switching combustion capacity, FIG. 3 is a time table, and FIG. 4 is a mixture ratio curve. 1...Water boiler, 2...Combustion device, 3...Air supply fan, 5...Igniter, 7...Gas passage, 8...Original gas Solenoid valve, 9...Emergency solenoid valve, IO...Proportional valve, 11.12...Capacity switching valve 21...First combustor, 22...Second combustor, 23... Third combustor, 71...first gas supply path, 72...second gas supply path, 73...third gas supply path, 74...chamber.
Claims (3)
れ所定の本数の燃焼管から成る燃焼器を中央とその両側
に配置して燃焼装置を形成し、両側の燃焼器にそれぞれ
能力切替弁を接続するとともに、中央の燃焼器に点火し
て常時燃焼させておき、両側の燃焼器に火移りさせるこ
とを特徴とする燃焼能力切替機構。(1) In a combustion device consisting of a large number of combustion tubes, combustors each consisting of a predetermined number of combustion tubes are placed in the center and on both sides to form the combustion device, and a capacity switching valve is connected to each of the combustors on both sides. At the same time, the combustion capacity switching mechanism is characterized in that the central combustor is ignited and burned at all times, and the flame is transferred to the combustors on both sides.
気との混合比を、ガス圧の調整と給気用ファンの回転数
の制御とによって初期着火時において行われる緩点火と
同様の混合比とし、給気用ファンの回転数が緩点火状態
にあることを確認してから能力切替を行うことを特徴と
する特許請求の範囲第１項記載の燃焼能力切替機構。(2) The mixing ratio of gas and combustion air at the time of capacity switching during normal combustion is adjusted to the same mixing ratio as slow ignition performed during initial ignition by adjusting the gas pressure and controlling the rotation speed of the air supply fan. 2. The combustion capacity switching mechanism according to claim 1, wherein the combustion capacity switching mechanism performs the capacity switching after confirming that the rotational speed of the air supply fan is in a slow ignition state.
数の能力切替弁を所定時間の範囲内でずらせて動作させ
ることを特徴とする特許請求の範囲第１項または第２項
記載の燃焼能力切替機構。(3) Combustion capacity according to claim 1 or 2, characterized in that a plurality of capacity switching valves that need to be switched at substantially the same timing are operated in a staggered manner within a predetermined time range. Switching mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13280688A JPH01305254A (en) | 1988-06-01 | 1988-06-01 | Combustion capacity switching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13280688A JPH01305254A (en) | 1988-06-01 | 1988-06-01 | Combustion capacity switching mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01305254A true JPH01305254A (en) | 1989-12-08 |
Family
ID=15090014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13280688A Pending JPH01305254A (en) | 1988-06-01 | 1988-06-01 | Combustion capacity switching mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01305254A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7334877B2 (en) | 1998-06-09 | 2008-02-26 | Silverbrook Research Pty Ltd. | Nozzle for ejecting ink |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320760U (en) * | 1976-07-30 | 1978-02-22 | ||
| JPS5419555U (en) * | 1977-07-12 | 1979-02-08 |
-
1988
- 1988-06-01 JP JP13280688A patent/JPH01305254A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5320760U (en) * | 1976-07-30 | 1978-02-22 | ||
| JPS5419555U (en) * | 1977-07-12 | 1979-02-08 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7334877B2 (en) | 1998-06-09 | 2008-02-26 | Silverbrook Research Pty Ltd. | Nozzle for ejecting ink |
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