JP2945721B2 - Combustion equipment - Google Patents
Combustion equipmentInfo
- Publication number
- JP2945721B2 JP2945721B2 JP16677390A JP16677390A JP2945721B2 JP 2945721 B2 JP2945721 B2 JP 2945721B2 JP 16677390 A JP16677390 A JP 16677390A JP 16677390 A JP16677390 A JP 16677390A JP 2945721 B2 JP2945721 B2 JP 2945721B2
- Authority
- JP
- Japan
- Prior art keywords
- ignition
- output
- proportional control
- control valve
- valve
- 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.)
- Expired - Fee Related
Links
Landscapes
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） この発明は、冷媒加熱式暖房機や温風暖房機に適用さ
れる燃焼装置に係り、特に燃焼器に燃料を供給する燃料
供給系統を改良した燃焼装置に関する。Description: Object of the Invention (Industrial application field) The present invention relates to a combustion device applied to a refrigerant heating heater or a hot air heater, and particularly supplies fuel to a combustor. The present invention relates to a combustion device having an improved fuel supply system.
（従来の技術） 室内を冷暖房する空気調和装置の中には冷媒加熱器を
組み込んだ冷媒加熱式暖房機（冷暖房機）があり、この
暖房機や温風暖房機にはキャビネットとしての本体ケー
シング内に燃焼器が収容されている。この燃焼器には燃
料供給系統を通ってガス燃料が供給され、供給されたガ
ス燃料は燃焼器内で燃焼せしめられるようになってい
る。燃焼器内で燃焼した燃焼ガスは続いて熱交換器に案
内され、ここで熱交換された後、排気トップにより外部
に排出される。(Conventional technology) Among air conditioners that cool and heat the inside of a room, there is a refrigerant heating type heater (cooling / heating device) incorporating a refrigerant heating device. Contains a combustor. Gas fuel is supplied to the combustor through a fuel supply system, and the supplied gas fuel is combusted in the combustor. The combustion gas burned in the combustor is subsequently guided to a heat exchanger, where the heat is exchanged, and then discharged outside by an exhaust top.
一方、前記燃料供給系統には電磁弁および比例制御弁
がそれぞれ設けられ、これらの弁で燃焼器へのガス燃料
の供給を制御している。このうち、燃焼器着火時（点火
時）の出力制御は、主に比例制御弁の出力（弁開度）制
御により第７図に示すように行なわれる。いわゆる緩点
火制御である。On the other hand, the fuel supply system is provided with an electromagnetic valve and a proportional control valve, respectively, and these valves control the supply of gaseous fuel to the combustor. Among them, the output control at the time of combustor ignition (ignition) is mainly performed by controlling the output of the proportional control valve (valve opening) as shown in FIG. This is so-called slow ignition control.
この緩点火制御においては、燃焼器の燃焼室内に空気
をパージするプリパージ期間Ａ中は、比例制御弁に点火
時出力を与えており、比例制御弁の弁開度は点火時出力
に維持される。点火時出力は、ガス燃料の着火性を考慮
し、最小出力よりも大きく、最大出力（全開）より小さ
な中間領域に設定される。このため、電磁弁を開放させ
る着火時には、ガス燃料は点火時出力のまま着火せしめ
られる。In the slow ignition control, during the pre-purge period A in which air is purged into the combustion chamber of the combustor, an output during ignition is given to the proportional control valve, and the valve opening of the proportional control valve is maintained at the output during ignition. . The output at the time of ignition is set to an intermediate region larger than the minimum output and smaller than the maximum output (fully open) in consideration of the ignitability of the gas fuel. Therefore, at the time of ignition that opens the solenoid valve, the gas fuel is ignited with the output at the time of ignition.
この着火時における比例制御弁の２次側圧力変化を第
８図に示す。着火時には電磁弁が開放されるため、比例
制御弁の１次側にガス１次圧が急激に加わる。比例制御
弁の２次側では比例制御弁の弁作動の追従性遅れによ
り、着火時に２次側圧力が点火時出力の２次圧力設定値
より跳ね上がることが多い。FIG. 8 shows the change in the secondary pressure of the proportional control valve at the time of ignition. Since the solenoid valve is opened at the time of ignition, the primary gas pressure is rapidly applied to the primary side of the proportional control valve. On the secondary side of the proportional control valve, the secondary pressure often jumps from the secondary pressure set value of the ignition output at the time of ignition due to the delay in following the valve operation of the proportional control valve.
（発明が解決しようとする課題） 従来の燃焼装置においては、燃焼器にガス燃料を供給
する比例制御弁の弁作動追従性遅れにより、着火時に比
例制御弁の２次側ガス圧力が予め設定された点火時出力
の２次設定ガス圧力より跳ね上がって着火異常音が発生
し、安定したスムーズな着火を行なうことができない等
の課題があった。(Problems to be Solved by the Invention) In the conventional combustion apparatus, the secondary gas pressure of the proportional control valve is set in advance at the time of ignition due to a delay in the valve operation followability of the proportional control valve that supplies gas fuel to the combustor. There has been a problem that the ignition output jumps up from the secondary set gas pressure of the ignition and an abnormal ignition sound is generated, and stable and smooth ignition cannot be performed.
この発明は上述した事情を考慮してなされたもので、
着火時に比例制御弁２次側のガス圧力の跳ね上がりを防
止して着火異常音の発生を抑え、安定した着火をスムー
ズに行ない得るようにした燃焼装置を提供することを目
的とする。The present invention has been made in view of the above circumstances,
It is an object of the present invention to provide a combustion device that prevents a rise in gas pressure on the secondary side of a proportional control valve during ignition, suppresses occurrence of abnormal ignition noise, and enables stable ignition to be performed smoothly.
（課題を解決するための手段） この発明に係る燃焼装置は、上述した課題を解決する
ために、燃焼器に燃料を供給する燃料供給系統に電磁弁
および比例制御弁をそれぞれ設け、上記電磁弁および比
例制御弁の作動ならびに点火トランスの点火タイミング
をコントローラにより制御した燃焼装置において、前記
コントローラは、点火制御の際、比例制御弁の弁開度を
プリパージ期間中点火時出力より低い出力に保ち、この
低出力時の所定時間後に点火トランスを作動させ、その
後、前記電磁弁を開動作させ、この電磁弁開動作時点か
ら所要の時間遅れをもって比例制御弁を低出力から点火
時出力に切り換える制御を行なうように設定したもので
ある。(Means for Solving the Problems) In order to solve the above-described problems, a combustion device according to the present invention is provided with an electromagnetic valve and a proportional control valve in a fuel supply system for supplying fuel to a combustor. And in the combustion device in which the operation of the proportional control valve and the ignition timing of the ignition transformer are controlled by the controller, the controller keeps the valve opening of the proportional control valve lower than the ignition output during the prepurge period during the ignition control, After a predetermined time at the time of the low output, the ignition transformer is operated, and thereafter, the solenoid valve is opened, and control for switching the proportional control valve from the low output to the output at the time of ignition with a required time delay from the time of the opening of the solenoid valve is performed. It is set to perform.
（作用） この燃焼装置は、コントローラにより比例制御弁１次側
のガス圧力変動を配慮しつつ、比例制御弁の弁開度を制
御し、着火時に比例制御弁の弁開度を電磁弁の開動作か
ら所要の時間遅れをもたせて、点火時出力より低い出力
から点火時出力設定に切り換える制御を行なうものであ
り、これにより着火時に比例制御弁の１次側に急激なガ
ス圧力変動が生じても、比例制御弁の弁作動遅れに伴な
い、２次側のガス圧力が急に大きく跳ね上がるのを確実
かつ有効的に防止し、着火異常音の発生を抑えることが
でき、余裕のある安定した点火を行なうことができる。(Operation) In this combustion apparatus, the controller controls the valve opening of the proportional control valve while taking into account the gas pressure fluctuation on the primary side of the proportional control valve, and changes the valve opening of the proportional control valve during ignition to open the solenoid valve. With a required time delay from the operation, control is performed to switch from the output lower than the ignition output to the ignition output setting. This causes a sudden gas pressure fluctuation on the primary side of the proportional control valve at the time of ignition. Also, it is possible to reliably and effectively prevent the gas pressure on the secondary side from suddenly and greatly jumping up due to the delay in the valve operation of the proportional control valve, and to suppress the occurrence of abnormal ignition noise, thereby providing a stable and sufficient margin. Ignition can take place.
（実施例） 以下、この発明に係る燃焼装置の一実施例について添
付図面を参照して説明する。(Embodiment) Hereinafter, an embodiment of a combustion device according to the present invention will be described with reference to the accompanying drawings.
この燃焼装置は冷媒加熱式暖房機（冷暖房機）、温風
暖房機等に適用される。第２図は燃焼装置を冷媒加熱式
暖房機（冷暖房機）に適用した一例を示す。This combustion device is applied to a refrigerant heating type heater (cooling / heating unit), a hot air heating unit and the like. FIG. 2 shows an example in which the combustion device is applied to a refrigerant heating type heater (air conditioner).
冷媒加熱式暖房機はキャビネットとしての本体ケーシ
ング10内に燃焼器11や熱交換器としての冷媒加熱器12、
図示しないコンプレッサや送風機等を収容しており、上
記燃焼器11には燃料供給系統13からLNG等のガス燃料
（ガス化粧料も含む）が供給されるようになっている。The refrigerant heating heater has a combustor 11 and a refrigerant heater 12 as a heat exchanger in a main body casing 10 as a cabinet.
A gas fuel (including gas cosmetics) such as LNG is supplied from the fuel supply system 13 to the combustor 11.
燃料供給系統13は燃料供給管14の途中のガス燃料の供
給をON−OFFする電磁弁15,16およびガス燃料の供給量を
制御する比例制御弁17が順次設けられる。比例制御弁17
および電磁弁15,16はCPU・マイコン等からなるコントロ
ーラ18により弁作動が制御される。比例制御弁17は、具
体的には、コントローラ18からの電流入力により弁開度
が調節され、燃焼器11へのガス燃料の供給を最小量（最
小出力）から最大量（最大出力）まで変化させ得るよう
になっており、その中間範囲に点火時出力を設けてい
る。点火制御時の出力はガス燃料の着火性等を考慮して
適宜定められる。The fuel supply system 13 is provided with solenoid valves 15 and 16 for turning on and off the supply of gas fuel in the middle of the fuel supply pipe 14 and a proportional control valve 17 for controlling the supply amount of gas fuel. Proportional control valve 17
The operation of the solenoid valves 15 and 16 is controlled by a controller 18 including a CPU, a microcomputer, and the like. Specifically, the proportional control valve 17 has its valve opening adjusted by a current input from the controller 18 to change the supply of gas fuel to the combustor 11 from a minimum amount (minimum output) to a maximum amount (maximum output). The ignition output is provided in the middle range. The output during the ignition control is appropriately determined in consideration of the ignitability of the gas fuel and the like.
比例制御弁17の下流側には圧力センサ20が設けられ、
このセンサ20で比例制御弁17の２次側ガス圧力を検出で
きるようになっている。圧力センサ20の下流側にバーナ
ノズル21が設けられ、このバーナノズル21から燃焼器11
の燃焼室23内にガス燃料を供給できるようになってい
る。バーナノズル21の噴出圧力は比例制御弁18の弁開度
調節により調整される。A pressure sensor 20 is provided downstream of the proportional control valve 17,
The sensor 20 can detect the secondary gas pressure of the proportional control valve 17. A burner nozzle 21 is provided downstream of the pressure sensor 20, and the burner nozzle 21
The gas fuel can be supplied into the combustion chamber 23 of the. The ejection pressure of the burner nozzle 21 is adjusted by adjusting the valve opening of the proportional control valve 18.
また、燃焼器11にはバーナ22や送風用ファン25が取付
けられ、この送風用ファン25から供給される燃焼用一次
および二次空気により燃焼室23内でガス燃料が正常に燃
焼せしめられるようになっている。Further, a burner 22 and a blower fan 25 are attached to the combustor 11, so that the gas fuel can be normally burned in the combustion chamber 23 by the primary and secondary air for combustion supplied from the blower fan 25. Has become.
燃焼器11で燃焼せしめられたガス燃料は燃焼ガスとな
って冷媒加熱器12に送られ、ここでコンプレッサ（図示
せず）に還流される冷媒を加熱している。冷媒を加熱し
た燃焼ガスは排気管としての排気エルボ26を通って排気
トップ27に案内され、この排気トップ27から外部に排出
される。排気トップ27は排気トップボディ28が本体ケー
シング10の側板10aに形成された開口29を通して内部に
収容される一方、この開口29と排気トップボディ28との
間の隙間が給気口として形成される。この給気口から好
い込まれた給気は、本体ケーシング10の給排気口部を冷
却する一方、排気トップ27内を通る排気ガスにより加熱
され、燃焼器11での燃焼に適した温度となって、燃焼器
11に案内される。The gaseous fuel burned in the combustor 11 is sent to a refrigerant heater 12 as a combustion gas, where it heats the refrigerant returned to a compressor (not shown). The combustion gas that has heated the refrigerant is guided to an exhaust top 27 through an exhaust elbow 26 as an exhaust pipe, and is discharged from the exhaust top 27 to the outside. In the exhaust top 27, the exhaust top body 28 is housed inside through an opening 29 formed in the side plate 10a of the main body casing 10, and a gap between the opening 29 and the exhaust top body 28 is formed as an air supply port. . The air supplied from the air inlet cools the air supply / exhaust port of the main body casing 10 and is heated by the exhaust gas passing through the exhaust top 27 to a temperature suitable for combustion in the combustor 11. The combustor
Guided to 11.
次に、燃焼装置の作用を説明する。 Next, the operation of the combustion device will be described.
燃焼装置の燃料供給系統13に設けられた電磁弁15,16
および比例制御弁17の弁作動はコントローラ18により制
御される。そして、送風ファン25のファン作動や点火ト
ランス（Ig）の点火タイミング、電磁弁15,16の開タイ
ミング、比例制御弁17の弁開度制御は、コントローラ18
により予め設定された（マイコン）制御により行なわ
れ、燃焼装置は第３図に示すように点火制御時の作動制
御が行なわれる。Solenoid valves 15, 16 provided in the fuel supply system 13 of the combustion device
The valve operation of the proportional control valve 17 is controlled by the controller 18. The fan operation of the blower fan 25, the ignition timing of the ignition transformer (Ig), the opening timing of the solenoid valves 15 and 16, and the valve opening degree control of the proportional control valve 17 are controlled by the controller 18.
The operation of the combustion device is controlled during ignition control as shown in FIG.
燃焼装置は、運転開始により送風ファン25が作動され
て燃焼用空気を給気口29から吸入し、燃焼器11の燃焼室
23内に予めパージするプリパージが行なわれる。このプ
リパージ期間Ａ中には、比例制御弁17の出力は最小出力
あるいは点火時出力以下の出力に設定され、その弁開度
を小さく点火時出力以下の低出力に保つ。In the combustion device, when the operation is started, the blower fan 25 is operated, and the combustion air is sucked in from the air supply port 29, and the combustion chamber of the combustor 11 is
Pre-purge for purging in advance is performed in 23. During the pre-purge period A, the output of the proportional control valve 17 is set to a minimum output or an output less than the output at the time of ignition, and the valve opening thereof is kept small and lower than the output at the time of ignition.
プリパージを開始してから所定時間、例えば数秒経過
した後に、点火トランス（点火プラグ）に電圧を印加さ
せて放電し、第４図に示すように着火準備（着火タイム
Ｂ）に入る。点火トランスの放電後数秒するとコントロ
ーラ18により電磁弁15,16が開放され、その後、例えば
０秒〜１秒後に、すなわち１秒以内の所要の時間遅れを
もって比例制御弁17の出力を最小出力あるいは点火時出
力以下の出力設定から点火時出力設定に切り換える制御
（マイコン制御）を行なう。After a lapse of a predetermined time, for example, several seconds, from the start of the prepurge, a voltage is applied to the ignition transformer (ignition plug) to discharge the battery, and the process enters the ignition preparation (ignition time B) as shown in FIG. In a few seconds after the discharge of the ignition transformer, the solenoid valves 15, 16 are opened by the controller 18, and thereafter, the output of the proportional control valve 17 is minimized or ignited, for example, after 0 to 1 second, that is, with a required time delay within 1 second. Control (microcomputer control) for switching from the output setting below the hour output to the ignition output setting is performed.
すなわちコントローラ18は電磁弁15,16の開タイミン
グに連動させて比例制御弁17を最小出力設定から点火時
出力設定に切り換える（マイコン）制御を行なう。その
際、比例制御弁17は弁作動の追従性遅れ（第６図に符号
ｔで示す）により、着火当初は最小出力あるいは点火時
出力以下の出力設定に保たれているので、比例制御弁17
の２次側のガス圧力は、その１次側ガス圧力が急激に変
動しても、第５図に示すように最小圧力に保たれ、２次
側ガス圧力に跳ね上がりが生じるのを有効的にかつ確実
に防止できる。That is, the controller 18 performs control (microcomputer) for switching the proportional control valve 17 from the minimum output setting to the ignition output setting in conjunction with the opening timing of the solenoid valves 15 and 16. At this time, the proportional control valve 17 is kept at a minimum output or an output less than or equal to the ignition output at the beginning of ignition due to a delay in follow-up of the valve operation (indicated by a symbol t in FIG. 6).
The secondary gas pressure is maintained at a minimum pressure as shown in FIG. 5 even if the primary gas pressure fluctuates rapidly, and effectively prevents the secondary gas pressure from jumping. And it can be surely prevented.
その後、比例制御弁17は最小出力（点火時出力より小
さな出力）より大きな点火時出力に切換えられ、２次側
ガス圧力は、点火時出力の設定ガス圧力に維持される。
したがって、着火時に比例制御弁17の一次側に急激なガ
ス圧力変動があっても、その２次側ではガス圧力の跳ね
上がりを防止でき、着火異常音の発生を防止することが
できる。Thereafter, the proportional control valve 17 is switched to an ignition output larger than the minimum output (output smaller than the ignition output), and the secondary gas pressure is maintained at the set gas pressure of the ignition output.
Therefore, even if there is a sudden change in gas pressure on the primary side of the proportional control valve 17 at the time of ignition, it is possible to prevent the gas pressure from jumping up on the secondary side, thereby preventing the occurrence of abnormal ignition noise.
以上に述べたように、この発明に係る燃焼装置におい
ては、コントローラは、点火制御の際、比例制御弁の弁
開度をプリパージ期間中点火時出力より低い出力に保
ち、この低出力時の所定時間後に点火トランスを作動さ
せ、その後、前記電磁弁を開動作させ、この電磁弁開動
作時点から所要の時間遅れをもって比例制御弁を低出力
から点火時出力に切り換える制御を行なうように設定し
たので、着火時に比例制御弁の１次側に急激なガス圧力
変動が生じても、電磁弁に対する比例制御弁の弁作動遅
れに伴なう比例制御弁２次側のガス圧力の跳ね上がりを
確実にかつ有効的に防止でき、着火異常音の発生を未然
に抑えることができる。このため、燃焼装置は余裕のあ
る安定した着火を行なうことができ、燃焼器の損傷を防
いで信頼性を向上させることができる。As described above, in the combustion device according to the present invention, during the ignition control, the controller keeps the valve opening of the proportional control valve at a lower output than the ignition output during the prepurge period, After a time, the ignition transformer is operated, and thereafter, the solenoid valve is opened, and control is performed to switch the proportional control valve from the low output to the ignition output with a required time delay from the time of the opening of the solenoid valve. Even if a sudden gas pressure fluctuation occurs on the primary side of the proportional control valve at the time of ignition, the gas pressure on the secondary side of the proportional control valve jumps with the delay of the valve operation of the proportional control valve with respect to the solenoid valve. It is possible to effectively prevent the occurrence of abnormal ignition sound. For this reason, the combustion device can perform a stable ignition with a margin, and can prevent damage to the combustor and improve reliability.
第１図はこの発明に係る燃焼装置の一実施例を示すもの
で、燃料供給系統の系統図、第２図はこの発明の燃焼装
置を冷媒加熱式暖房機（冷暖房機）に適用した例を示す
図、第３図は第２図に示された燃焼装置のブロック図、
第４図は燃焼装置の着火時における比例制御弁の出力
（弁開度）の時間変化を示す図、第５図は着火時におけ
る比例制御弁の２次側ガス圧力の時間変化を示す図、第
６図は電磁弁と比例制御弁の作動関係を示す図、第７図
は従来の燃焼装置における比例制御弁の着火時の出力変
化を示す図、第８図は従来の燃焼装置における比例制御
弁２次側のガス圧力変化を示す図である。 10……本体ケーシング、11……燃焼器、12……冷媒加熱
器（熱交換器）、13……燃料供給系統、15,16……電磁
弁、17……比例制御弁、18……コントローラ、20……圧
力センサ、21……ノズル、22……バーナ、23……燃焼
室、26……排気エルボ（排気管）、27……排気トップ、
28……排気トップボディ。FIG. 1 shows an embodiment of a combustion device according to the present invention, and is a system diagram of a fuel supply system. FIG. 2 shows an example in which the combustion device of the present invention is applied to a refrigerant heating type heater (cooling / heating device). FIG. 3 is a block diagram of the combustion device shown in FIG. 2,
FIG. 4 is a diagram showing a time change of the output (valve opening) of the proportional control valve when the combustion device is ignited; FIG. 5 is a diagram showing a time change of the secondary gas pressure of the proportional control valve at the time of ignition; FIG. 6 is a view showing an operation relationship between the solenoid valve and the proportional control valve, FIG. 7 is a view showing a change in output of the proportional control valve at the time of ignition in the conventional combustion device, and FIG. 8 is a proportional control in the conventional combustion device. It is a figure which shows the gas pressure change of the valve secondary side. 10: Main body casing, 11: Combustor, 12: Refrigerant heater (heat exchanger), 13: Fuel supply system, 15, 16: Solenoid valve, 17: Proportional control valve, 18: Controller , 20 ... pressure sensor, 21 ... nozzle, 22 ... burner, 23 ... combustion chamber, 26 ... exhaust elbow (exhaust pipe), 27 ... exhaust top,
28 …… Exhaust top body.
Claims (1)
磁弁および比例制御弁をそれぞれ設け、上記電磁弁およ
び比例制御弁の作動ならびに点火トランスの点火タイミ
ングをコントローラにより制御した燃焼装置において、
前記コントローラは、点火制御の際、比例制御弁の弁開
度をプリパージ期間中点火時出力より低い出力に保ち、
この低出力時の所定時間後に点火トランスを作動させ、
その後、前記電磁弁を開動作させ、この電磁弁開動作時
点から所要の時間遅れをもって比例制御弁を低出力から
点火時出力に切り換える制御を行なうように設定したこ
とを特徴とする燃焼装置。A combustion apparatus in which an electromagnetic valve and a proportional control valve are provided in a fuel supply system for supplying fuel to a combustor, and the operation of the electromagnetic valve and the proportional control valve and the ignition timing of an ignition transformer are controlled by a controller.
During the ignition control, the controller keeps the valve opening of the proportional control valve at an output lower than the ignition output during the prepurge period,
After a predetermined time at the time of this low output, the ignition transformer is operated,
Thereafter, the solenoid valve is opened, and control is performed to switch the proportional control valve from a low output to an ignition output with a required time delay from the time the solenoid valve is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16677390A JP2945721B2 (en) | 1990-06-27 | 1990-06-27 | Combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16677390A JP2945721B2 (en) | 1990-06-27 | 1990-06-27 | Combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0460311A JPH0460311A (en) | 1992-02-26 |
| JP2945721B2 true JP2945721B2 (en) | 1999-09-06 |
Family
ID=15837423
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16677390A Expired - Fee Related JP2945721B2 (en) | 1990-06-27 | 1990-06-27 | Combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2945721B2 (en) |
-
1990
- 1990-06-27 JP JP16677390A patent/JP2945721B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0460311A (en) | 1992-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6866202B2 (en) | Variable output heating and cooling control | |
| US5666889A (en) | Apparatus and method for furnace combustion control | |
| US20220026066A1 (en) | Combustion apparatus | |
| JP2945721B2 (en) | Combustion equipment | |
| JPH11211228A (en) | Combination hot water supply apparatus | |
| JPH0367918A (en) | Controller of burner | |
| JPH0532652B2 (en) | ||
| JP3373936B2 (en) | Combustion equipment | |
| JP2975513B2 (en) | Combustion equipment | |
| JPH01127854A (en) | Heater | |
| KR940005117B1 (en) | Combustion control method for combustion device | |
| KR940004177B1 (en) | Heating controller | |
| JPH01102214A (en) | Combustion type heating apparatus | |
| JPS5974424A (en) | Combustion device of water heater | |
| JP2675516B2 (en) | Combustion equipment | |
| US5403182A (en) | Control system for gas fired heating apparatus using double-throw radiant heat sensing switch | |
| JP2663388B2 (en) | Hot air heater | |
| JPH04335914A (en) | Combustion device | |
| JPH0615257Y2 (en) | Cold / hot shower device | |
| JP3072264B2 (en) | Heating system | |
| JP2002130661A (en) | Combustion controller for heating | |
| JPH0248810B2 (en) | ||
| JPH01102218A (en) | Burner | |
| JPH0361088B2 (en) | ||
| JPH0996442A (en) | Hot water supplying apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090625 Year of fee payment: 10 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090625 Year of fee payment: 10 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |