JP2951464B2 - Safety device for combustion equipment - Google Patents
Safety device for combustion equipmentInfo
- Publication number
- JP2951464B2 JP2951464B2 JP3348044A JP34804491A JP2951464B2 JP 2951464 B2 JP2951464 B2 JP 2951464B2 JP 3348044 A JP3348044 A JP 3348044A JP 34804491 A JP34804491 A JP 34804491A JP 2951464 B2 JP2951464 B2 JP 2951464B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- pressure difference
- fan
- detected
- exhaust
- 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 - Lifetime
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
- F23N2005/181—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using detectors sensitive to rate of flow of air
- F23N2005/182—Air flow switch
Landscapes
- Regulation And Control Of Combustion (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、給湯器等の燃焼機器に
用いられ給排気不足を検出する安全装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device used in a combustion apparatus such as a water heater for detecting a shortage of air supply and exhaust.
【0002】[0002]
【従来の技術】フアンにより燃焼用空気を吸入して所定
の空燃比で燃焼する燃焼機器においては、ほこり、油等
により給気フィルタが詰って所定の空燃比を維持できな
い、つまり、燃焼用空気量が不足することがある。ま
た、すすが発生し熱交換器のフインが詰まって排気不良
を起こすこともある。そこで、従来から、このような給
排気不良を検出した場合に燃焼機器の動作を停止させる
安全装置が組み込まれている。この給排気不良は、燃焼
室内とフアンケース内の圧力差に応じてオン、オフする
風圧スイッチ等を用いて検出される。そして、最近で
は、低レベルの給排気不良であれば燃焼を停止させずに
警報を出力し、高レベルの給排気不良であれば燃焼を停
止させるといつた2段階方式のものも知られている。2. Description of the Related Art In a combustion apparatus in which combustion air is sucked by a fan and burns at a predetermined air-fuel ratio, an air-supply filter is blocked by dust, oil, or the like, and the predetermined air-fuel ratio cannot be maintained. The amount may be insufficient. Ma
And, to be there also cause exhaust defective clogged fins of generated heat exchanger. Therefore, conventionally, a safety device for stopping the operation of the combustion equipment when such a defective air supply / exhaust is detected is incorporated. This defective supply / exhaust is detected using a wind pressure switch or the like that is turned on and off according to the pressure difference between the combustion chamber and the fan case. Recently, a two-stage system has been known in which a warning is output without stopping the combustion when the supply / exhaust level is low, and the combustion is stopped when the supply / exhaust level is high. I have.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、従来装
置では、このような給排気不良を2段階のレベルでとら
えるために、接点の動作レベルの異なる風圧スイッチを
合計2組設けなければならなかった。このため、風圧ス
イッチ,導圧管等の設置スペースを広くとらなければな
らず、近年要求されているコンパクト化に応えることが
難しかった。また、部品点数や製造工数が多くなりコス
トアップにつながってしまう。本発明の燃焼機器の安全
装置は、風圧スイッチ等の差圧センサを1つ用いるだけ
で所期の安全動作を維持して上記課題を解決することを
目的とする。However, in the conventional apparatus, in order to catch such a supply / exhaust failure at two levels, a total of two sets of wind pressure switches having different operation levels of the contacts have to be provided. For this reason, the installation space for the wind pressure switch, the pressure guide tube, and the like must be widened, and it has been difficult to meet the recent demand for compactness. Also, the number of parts and the number of manufacturing steps increase, which leads to an increase in cost. An object of the present invention is to provide a safety device for a combustion apparatus, which solves the above-mentioned problem while maintaining a desired safe operation by using only one differential pressure sensor such as a wind pressure switch.
【0004】[0004]
【課題を解決するための手段】上記課題を解決するため
本発明の燃焼機器の安全装置は、ファンにより燃焼用空
気を吸入して燃焼する燃焼機器の給・排気不足を検出す
る安全装置において、燃焼室内とファンケース内の圧力
差あるいは燃焼室内と機器ケース内の圧力差を検出する
差圧検出手段と、ポストパージ中に上記ファンの回転数
を複数段階に切り替える回転数切替手段と、上記切り替
えられた回転数のうち、回転数大のときに上記差圧検出
手段により所定の圧力差が検出されない場合には燃焼停
止モードとし、回転数大のときに上記所定圧力差が検出
されるが回転数小のときには上記所定圧力差が検出され
ない場合に警告モードとする異常モード判別手段と上記
燃焼停止モード時には燃焼機器の燃焼を禁止し、上記警
告モード時には燃焼を禁止せずに異常を報知する異常処
理手段とを備えたことを要旨とする。According to the present invention, there is provided a safety device for a combustion apparatus for detecting a shortage of supply and exhaust of a combustion apparatus which burns by inhaling combustion air with a fan. Differential pressure detection means for detecting a pressure difference between the combustion chamber and the fan case or a pressure difference between the combustion chamber and the equipment case; a rotation number switching means for switching the rotation number of the fan to a plurality of stages during post-purge; When the predetermined pressure difference is not detected by the differential pressure detecting means when the rotation speed is high, the combustion stop mode is set. When the rotation speed is high, the predetermined pressure difference is detected. When the pressure difference is small, the abnormal mode discriminating means sets a warning mode when the predetermined pressure difference is not detected. In the combustion stop mode, combustion of the combustion equipment is prohibited. And gist further comprising an abnormality processing means for informing the abnormality without prohibited.
【0005】[0005]
【作用】上記構成を有する本発明の燃焼機器の安全装置
は、回転数切替手段によりポストパージ中にファンの回
転数を複数段階に切り替え、回転数が大の場合と小の場
合とにおける圧力差(燃焼室内とファンケースあるいは
機器ケース内の圧力差)を差圧検出手段により検出す
る。そして、ファン回転数が大のときに所定の圧力差が
検出されない場合には燃焼機器の燃焼を禁止し、ファン
回転数が大のときに所定圧力差が検出されるものの回転
数が小のときには所定圧力差が検出されない場合には、
燃焼を禁止せずに異常を報知する。一般に、ファンの回
転数が大きいほど圧力差が大きくなるのであるが、給排
気不良が生じていれば、その度合いが大きいほど圧力差
が小さくなる。従って、ファン回転数大のときに所定の
圧力差が得られない場合には、危険な給排気不良レベル
であるとして燃焼を禁止し、ファン回転数小のときのみ
所定の圧力差が得られない場合には、低レベルの給排気
不良として燃焼を禁止せずに異常を報知するのである。
この結果、1つの差圧検出手段で2段階レベルの検出が
可能となり、コンパクト化,部品点数削減等を図ること
ができる。また、低レベル時に異常を報知することで、
燃焼機器を突然停止させてしまうという不具合もなく、
非常に使い勝手が良い。According to the safety device for a combustion apparatus of the present invention having the above-described structure, the number of rotations of the fan is switched to a plurality of stages during post-purging by the rotation number switching means, and the pressure difference between when the number of rotations is large and when the number of rotations is small is reduced. (Pressure difference between the combustion chamber and the fan case or the equipment case) is detected by the differential pressure detecting means. If the predetermined pressure difference is not detected when the fan rotation speed is high, combustion of the combustion device is prohibited.If the predetermined pressure difference is detected when the fan rotation speed is high, but the rotation speed is low, If the predetermined pressure difference is not detected,
Notify abnormalities without prohibiting combustion. Generally, the pressure difference increases as the number of rotations of the fan increases, but if the supply / exhaust failure occurs, the pressure difference decreases as the degree of the supply / exhaust failure increases. Therefore, if the predetermined pressure difference cannot be obtained when the fan rotation speed is high, it is determined that the level is a dangerous supply / exhaust defective level, and combustion is prohibited, and the predetermined pressure difference cannot be obtained only when the fan rotation speed is low. In such a case, the abnormality is notified without prohibiting the combustion as a low level supply / exhaust defect.
As a result, two levels of detection can be performed by one differential pressure detecting means, so that downsizing, reduction in the number of parts, and the like can be achieved. In addition, by reporting abnormalities at low level,
There is no malfunction that suddenly stops the combustion equipment,
Very convenient.
【0006】[0006]
【実施例】以上説明した本発明の構成・作用を一層明確
にするために、以下本発明の燃焼機器の安全装置の好適
な実施例について説明する。図1は、一実施例としての
安全装置を給湯器に適用した概略構成図である。給湯器
1は、器具ケース2内中央に設けられる燃焼室3と、燃
焼室3内のバーナ4による燃焼熱で伝熱管(図示略)に
通水された水と熱交換する熱交換器5と、熱交換器5の
上部に設けられる排気フード6と、燃焼排気を排出する
排気筒7とを備えると共に、燃焼室3底部には燃焼用空
気を吸入して燃焼室3に供給するファン8(本実施例で
はシロッコファン)が設けられている。燃焼用空気は、
ファン8の回転により器具ケース2側面に設けられた給
気口9から取り込まれ、給気フィルタ10によりほこり
等が除去された後ファンケース11を経由して燃焼室3
に送られる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the configuration and operation of the present invention described above, a preferred embodiment of a safety device for a combustion apparatus according to the present invention will be described below. FIG. 1 is a schematic configuration diagram in which a safety device as one embodiment is applied to a water heater. The water heater 1 includes a combustion chamber 3 provided in the center of the appliance case 2, and a heat exchanger 5 that exchanges heat with water passed through a heat transfer tube (not shown) by combustion heat generated by a burner 4 in the combustion chamber 3. An exhaust hood 6 provided at an upper portion of the heat exchanger 5 and an exhaust pipe 7 for discharging combustion exhaust, and a fan 8 (at the bottom of the combustion chamber 3 for sucking combustion air and supplying the combustion air to the combustion chamber 3 ( In this embodiment, a sirocco fan) is provided. The combustion air is
The combustion chamber 3 is taken in from an air supply port 9 provided on the side of the appliance case 2 by the rotation of the fan 8, and dust is removed by an air supply filter 10 and then passed through a fan case 11.
Sent to
【0007】バーナ4には、ガス導管12により燃料ガ
スが供給される。このガス導管12には、ガス流路の開
閉のみを行なう主電磁弁13と、制御信号に応じた開度
に設定されて所望のガス供給量に調整する比例電磁弁1
4とが直列に設けられる。そして、このガス供給量に応
じた量の燃焼用空気が燃焼室3に供給されるよう、ファ
ン8のモータ(図示略)が制御(回転数制御)される。[0007] Fuel gas is supplied to the burner 4 by a gas conduit 12. The gas conduit 12 has a main solenoid valve 13 that only opens and closes a gas flow path, and a proportional solenoid valve 1 that is set to an opening in accordance with a control signal and adjusts to a desired gas supply amount.
4 are provided in series. Then, a motor (not shown) of the fan 8 is controlled (rotational speed control) so that an amount of combustion air corresponding to the gas supply amount is supplied to the combustion chamber 3.
【0008】また、上述した給排気系における給排気不
足を検出するために、ファンケース11内圧力と燃焼室
3内圧力との差を検出する風圧スイッチ20が設けられ
る。この風圧スイッチ20は、ファンケース11内と連
通する導圧管21をダイヤフラムの第一室22に、燃焼
室3内と連通する導圧管23をダイヤフラムの第二室2
4にそれぞれ連通し、両者の圧力差が所定圧力以上の場
合に接点部25がオンするものである。In order to detect a shortage of supply and exhaust in the supply and exhaust system described above, a wind pressure switch 20 for detecting a difference between the pressure in the fan case 11 and the pressure in the combustion chamber 3 is provided. The wind pressure switch 20 includes a pressure guiding tube 21 communicating with the inside of the fan case 11 in the first chamber 22 of the diaphragm, and a pressure guiding tube 23 communicating with the inside of the combustion chamber 3 in the second chamber 2 of the diaphragm.
4, and the contact portion 25 is turned on when the pressure difference between them is equal to or higher than a predetermined pressure.
【0009】器具ケース2内には、これらの燃焼系,給
排気系の制御を司どるコントローラ30が設けられる。
コントローラ30は、図示しない周知の算術論理演算回
路を構成するCPU,RAM,ROMと、各種のセンサ
からの信号を入力する入力インタフェースと、各種のア
クチュエータに駆動信号を出力する出力インタフェース
等から構成されるマイクロコンピュータである。尚、図
2においては、本発明の特徴となる給排気不足検出処理
にかかる構成のみの入出力関係を破線にて表している。
このコントローラ30には、遠隔操作用のリモコン31
が接続される。リモコン31には、通常の温度設定スイ
ッチ,運転スイッチ等(図示略)の他に、給排気不良を
報知する警告ランプ32(警告ブザーであってもよい)
が設けられる。尚、給湯器本体側にも同様の警告ランプ
33が設けられる。A controller 30 for controlling the combustion system and the supply / exhaust system is provided in the appliance case 2.
The controller 30 includes a CPU, a RAM, and a ROM that constitute a well-known arithmetic logic operation circuit (not shown), an input interface that inputs signals from various sensors, an output interface that outputs drive signals to various actuators, and the like. Microcomputer. In FIG. 2, the dashed line indicates the input / output relationship of only the configuration related to the supply / exhaust shortage detection process which is a feature of the present invention.
The controller 30 includes a remote controller 31 for remote operation.
Is connected. The remote controller 31 includes a normal temperature setting switch, an operation switch, and the like (not shown), and a warning lamp 32 (a warning buzzer may be used) for notifying a supply / exhaust failure.
Is provided. Note that a similar warning lamp 33 is provided on the water heater main body side.
【0010】次に、コントローラ30が実行する給排気
不足検出処理について説明する。この処理は、燃焼終了
後のポストパージ中に行なわれる。ポストパージ期間に
おいては、図2に示すように、ファン8を例えば250
0rpm/minで所定期間回転させ(以下、この期間
を第1期間と呼ぶ)、次に第1期間よりも高い例えば4
000rpm/minで所定期間回転させる(以下、こ
の期間を第2期間と呼ぶ)。その後、通常のポストパー
ジ用に例えば1500rpm/minでファン8を回転
させる。Next, a description will be given of a supply / exhaust shortage detection process executed by the controller 30. This process is performed during post-purge after the end of combustion. In the post-purge period, as shown in FIG.
The rotation is performed at 0 rpm / min for a predetermined period (hereinafter, this period is referred to as a first period).
The motor is rotated at a speed of 000 rpm / min for a predetermined period (hereinafter, this period is referred to as a second period). Thereafter, the fan 8 is rotated at, for example, 1500 rpm / min for normal post-purging.
【0011】そして、この第1,第2期間のそれぞれに
おける風圧スイッチ20の状態(オンかオフか)を読み
取り、表1に示すように、第1,第2の両期間(第1期
間だけでもよい)において風圧スイッチ20がオンして
いる場合には正常モードとし、第1期間ではオフしてい
るものの第2期間でオンする場合には低レベルの給排気
不足であるとして警告モードとし、第1,第2の両期間
(第2期間だけでもよい)においてオフしている場合に
は高レベルの給排気不足であるとして停止モードと設定
する。Then, the state (on or off) of the wind pressure switch 20 in each of the first and second periods is read, and as shown in Table 1, both the first and second periods (only in the first period). If the wind pressure switch 20 is on, the normal mode is set, and if the wind pressure switch 20 is off in the first period, but is turned on in the second period, a low-level air supply / exhaust condition is determined to be low. If it is off in both the first and second periods (or only the second period), it is determined that the supply / exhaust deficiency is at a high level, and the stop mode is set.
【表1】 [Table 1]
【0012】警告モードと設定された場合には、警告ラ
ンプ32,33を点滅させて使用者に異常を報知する。
一方、停止モードと設定された場合には、不完全燃焼等
による危険防止のため以後の燃焼を禁止する。このた
め、永年使用により給気フィルタ10が詰って給排気不
良となった場合には、まず先に警告ランプ32,33に
より異常が報知されるため、器具が停止してしまう前に
給気フィルタ10等を掃除することで正常に戻すことが
でき、突然給湯不能となって困ることがなく非常に使い
勝手が良い。When the warning mode is set, the warning lamps 32 and 33 blink to notify the user of the abnormality.
On the other hand, when the stop mode is set, subsequent combustion is prohibited to prevent danger due to incomplete combustion or the like. For this reason, when the air supply filter 10 is clogged due to long-term use and the air supply / exhaust is defective, the abnormality is first notified by the warning lamps 32 and 33, so that the air supply filter is stopped before the appliance stops. It is possible to return to normal by cleaning 10 etc., and it is very easy to use without trouble because hot water cannot be supplied suddenly.
【0013】また、ファン回転数の異なる第1,第2期
間での圧力差に応じて異常を検出しているため、1つの
風圧スイッチ20で燃焼禁止と警告との2段階レベルで
の異常を検知することができる。この結果、従来のよう
に2組の風圧スイッチを設ける必要がなくなり、給湯器
1のコンパクト化や製造工数,部品点数等の削減を図る
ことができる。以上本発明の実施例について説明した
が、本発明はこうした実施例に何等限定されるものでな
く、本発明の要旨を逸脱しない範囲で様々な態様で実施
し得ることは勿論である。例えば、本実施例では燃焼室
3内とファンケース11内との圧力差を用いたが、燃焼
室3内と器具ケース2内との圧力差を用いても同様な給
排気不足を検出することができる。Further, since the abnormality is detected in accordance with the pressure difference between the first and second periods in which the number of rotations of the fan is different, one wind pressure switch 20 can be used to detect abnormality at two levels of combustion inhibition and warning. Can be detected. As a result, there is no need to provide two sets of wind pressure switches as in the related art, and the water heater 1 can be made compact, and the number of manufacturing steps, the number of parts, and the like can be reduced. Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. For example, in the present embodiment, the pressure difference between the inside of the combustion chamber 3 and the inside of the fan case 11 is used. Can be.
【0014】[0014]
【発明の効果】以上説明したように本発明の燃焼機器の
安全装置は、ポストパージ中にファンの回転数を複数段
階に切り替えて回転数大のときと小のときとの夫々の差
圧を検出しているため、1つの風圧スイッチで燃焼禁止
と警告との2段階レベルでの異常を検知することができ
る。この結果、従来のように2組の風圧スイッチを設け
る必要がなくなり、燃焼機器のコンパクト化や製造工
数,部品点数等の削減を図ることができる。また、低レ
ベル時に異常を報知することで、燃焼を突然停止させて
しまうという不具合もなく、非常に使い勝手が良い。As described above, the safety device for a combustion apparatus according to the present invention switches the number of rotations of the fan to a plurality of stages during post-purge to reduce the differential pressure between when the rotation speed is high and when the rotation speed is low. Since detection is performed, a single wind pressure switch can detect abnormality at two levels, that is, combustion inhibition and warning. As a result, it is not necessary to provide two sets of wind pressure switches as in the related art, and it is possible to reduce the size of the combustion equipment and the number of manufacturing steps and parts. In addition, by notifying the abnormality at the time of the low level, there is no problem that the combustion is suddenly stopped, and the usability is very good.
【図1】一実施例としての給湯器の概略構成図である。FIG. 1 is a schematic configuration diagram of a water heater as one embodiment.
【図2】ポストパージ中のファンの回転数を表すグラフ
である。FIG. 2 is a graph showing the number of rotations of a fan during post-purge.
1…給湯器,2…器具ケース,3…燃焼室,8…ファ
ン,11…ファンケース,20…風圧スイッチ,30…
コントローラ,32,33…警告ランプ。DESCRIPTION OF SYMBOLS 1 ... Water heater, 2 ... Appliance case, 3 ... Combustion chamber, 8 ... Fan, 11 ... Fan case, 20 ... Wind pressure switch, 30 ...
Controller, 32, 33 ... warning lamp.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−149029(JP,A) 特開 平5−118532(JP,A) 特開 昭61−285316(JP,A) 実開 平4−41949(JP,U) 実開 昭57−120850(JP,U) (58)調査した分野(Int.Cl.6,DB名) F23N 5/18 101 F23N 5/24 104 F23N 5/26 101 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-149029 (JP, A) JP-A-5-118532 (JP, A) JP-A-61-285316 (JP, A) 41949 (JP, U) Shokai Sho 57-120850 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) F23N 5/18 101 F23N 5/24 104 F23N 5/26 101
Claims (1)
する燃焼機器の給・排気不足を検出する安全装置におい
て、 燃焼室内とファンケース内の圧力差あるいは燃焼室内と
機器ケース内の圧力差を検出する差圧検出手段と、 ポストパージ中に上記ファンの回転数を複数段階に切り
替える回転数切替手段と、 上記切り替えられた回転数のうち、回転数大のときに上
記差圧検出手段により所定の圧力差が検出されない場合
には燃焼停止モードとし、回転数大のときに上記所定圧
力差が検出されるが回転数小のときには上記所定圧力差
が検出されない場合に警告モードとする異常モード判別
手段と上記燃焼停止モード時には燃焼機器の燃焼を禁止
し、上記警告モード時には燃焼を禁止せずに異常を報知
する異常処理手段とを備えたことを特徴とする燃焼機器
の安全装置。A safety device for detecting insufficiency of supply and exhaust of combustion equipment that inhales and burns combustion air with a fan, wherein a pressure difference between a combustion chamber and a fan case or a pressure difference between a combustion chamber and an equipment case is detected. A differential pressure detecting means for detecting, a rotational speed switching means for switching the rotational speed of the fan to a plurality of stages during post-purging, and a predetermined rotational speed predetermined by the differential pressure detecting device when the rotational speed is high among the switched rotational speeds. When the pressure difference is not detected, the combustion stop mode is set. When the rotation speed is high, the predetermined pressure difference is detected. When the rotation speed is low, the warning mode is set when the predetermined pressure difference is not detected. Means and abnormality processing means for prohibiting combustion of the combustion equipment in the combustion stop mode and notifying the abnormality without prohibiting combustion in the warning mode. Safety device for combustion equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3348044A JP2951464B2 (en) | 1991-12-02 | 1991-12-02 | Safety device for combustion equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3348044A JP2951464B2 (en) | 1991-12-02 | 1991-12-02 | Safety device for combustion equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05157230A JPH05157230A (en) | 1993-06-22 |
JP2951464B2 true JP2951464B2 (en) | 1999-09-20 |
Family
ID=18394363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3348044A Expired - Lifetime JP2951464B2 (en) | 1991-12-02 | 1991-12-02 | Safety device for combustion equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2951464B2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08161668A (en) * | 1994-12-07 | 1996-06-21 | Toto Ltd | Display controller for apparatus |
IT1287317B1 (en) * | 1996-07-12 | 1998-08-04 | Rbl Spa | SAFETY DEVICE FOR THE CONTROL OF THE PRODUCTION OF CARBON OXIDE IN THE BURNERS. |
JP5917326B2 (en) * | 2012-07-27 | 2016-05-11 | 株式会社パロマ | Water heater |
JP6302763B2 (en) * | 2014-06-24 | 2018-03-28 | リンナイ株式会社 | Combustion device |
JP6310789B2 (en) * | 2014-06-24 | 2018-04-11 | リンナイ株式会社 | Combustion device |
-
1991
- 1991-12-02 JP JP3348044A patent/JP2951464B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH05157230A (en) | 1993-06-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2951464B2 (en) | Safety device for combustion equipment | |
CN112923561B (en) | Water heater and control method thereof | |
JP2951465B2 (en) | Combustor | |
JPH05248646A (en) | Protective device for boiler circulation pump | |
JP3558448B2 (en) | Combustion equipment | |
JPH0512676Y2 (en) | ||
JPH05164323A (en) | Combustion device | |
JP3202917B2 (en) | Hot air heater | |
JP3654607B2 (en) | Incomplete combustion prevention device for gas combustion equipment | |
JP2977656B2 (en) | Prevention device for empty firing of gas combustion equipment | |
JP2631058B2 (en) | Combined combustion device | |
JPS6373019A (en) | Ventilating pressure detector | |
JP3663818B2 (en) | Failure determination method in boiler | |
JPH0639207Y2 (en) | Check valve abnormality detection device | |
JP2858377B2 (en) | Control device for air conditioner | |
JP3678873B2 (en) | Hot air heater | |
JPH05157358A (en) | Heating apparatus | |
JP2545946Y2 (en) | Closed oil burner | |
JPH0252928A (en) | Safety device for gas combustion equipment | |
KR20000013957U (en) | Intercooler with troubleshooting function | |
JPH0217319A (en) | Air supplying or discharging cylinder | |
JPH03263201A (en) | Operation controller for apparatus | |
JPH0854118A (en) | Combustion apparatus | |
KR19990080880A (en) | Air conditioner for warm air heating | |
JPH04174211A (en) | Preventing method for malfunction during pilot burner operation |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070709 Year of fee payment: 8 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080709 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080709 Year of fee payment: 9 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090709 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090709 Year of fee payment: 10 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100709 Year of fee payment: 11 |