JPH0637975B2 - Combustion control device - Google Patents
Combustion control deviceInfo
- Publication number
- JPH0637975B2 JPH0637975B2 JP61009359A JP935986A JPH0637975B2 JP H0637975 B2 JPH0637975 B2 JP H0637975B2 JP 61009359 A JP61009359 A JP 61009359A JP 935986 A JP935986 A JP 935986A JP H0637975 B2 JPH0637975 B2 JP H0637975B2
- Authority
- JP
- Japan
- Prior art keywords
- rotation speed
- exhaust fan
- output
- supply
- rotation
- 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
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 238000001514 detection method Methods 0.000 claims description 11
- 230000007423 decrease Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- F23N5/184—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2223/00—Signal processing; Details thereof
- F23N2223/08—Microprocessor; Microcomputer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/02—Ventilators in stacks
- F23N2233/04—Ventilators in stacks with variable speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2233/00—Ventilators
- F23N2233/06—Ventilators at the air intake
- F23N2233/08—Ventilators at the air intake with variable speed
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Description
【発明の詳細な説明】 (イ)産業上の利用分野 本発明は強制給排気用ファンを備えた燃焼制御装置に関
する。The present invention relates to a combustion control device equipped with a forced air supply / exhaust fan.
(ロ)従来の技術 バーナにその燃焼用の空気を強制的に供給する強制給排
気用ファンを備えたもので、特にバーナの燃焼量に応じ
てファンの回転数制御を行なうものでは、例えば本願出
願人による特願昭６０−１８７６９６号にて示す様に、
ファンの回転数を検出する検出手段と、バーナの燃焼量
に対応した給排気ファンの回転数を設定する回転設定手
段との出力を比較する比較手段とを設け、ファンの回転
数を常にバーナの燃焼量に対応した回転数に回転制御す
る場合、風等による吸気通路のわずかな詰まり等によっ
てファンへの負荷が軽減して回転数が上昇時にも、ファ
ンの回転数が所定の回転数になる様に制御する為に、バ
ーナへの送風量が減少して不完全燃焼を生じるという問
題がある。(B) Conventional technology A burner is provided with a forced air supply / exhaust fan for forcibly supplying the air for combustion, and particularly in the case of controlling the rotation speed of the fan according to the combustion amount of the burner, for example, the present application As shown in Japanese Patent Application No. 60-187696 by the applicant,
The detection means for detecting the rotation speed of the fan and the comparison means for comparing the output with the rotation setting means for setting the rotation speed of the air supply / exhaust fan corresponding to the combustion amount of the burner are provided, and the rotation speed of the fan is always set to the burner's rotation speed. When the rotation speed is controlled to correspond to the combustion amount, even if the load on the fan is reduced due to slight clogging of the intake passage due to wind, etc., and the rotation speed rises, the fan rotation speed becomes the specified rotation speed. Therefore, there is a problem in that the amount of air blown to the burner decreases and incomplete combustion occurs.
(ハ)発明が解決しようとする問題点 本発明は主に吸気抵抗の増加等に伴なうバーナへの給気
量の低下防止を目的とする。(C) Problems to be Solved by the Invention The present invention is mainly intended to prevent a decrease in the amount of air supplied to the burner due to an increase in intake resistance or the like.
(ニ)問題点を解決するための手段 本発明では、バーナの燃焼量に対応した給排気ファンの
基準回転数を設定する回転設定手段と、この回転設定手
段に基づいて上記給排気ファン駆動用のデータを出力す
る駆動データ出力手段と、この駆動データ出力手段の出
力に基づいて給排気ファンを駆動する回転駆動手段と、
上記給排気ファンの回転数を検出する検出手段と、この
検出手段の出力と回転設定手段の出力とを比較する比較
手段と、前記給排気ファンの回転数が上記基準回転数以
下の時に駆動データ出力手段のデータを変更して給排気
ファンを基準回転数にて駆動するとともに、給排気ファ
ンの回転数が上記基準回転数以上の時にこの回転数を許
容する制御手段とから成る構成である。(D) Means for Solving the Problems In the present invention, a rotation setting means for setting a reference rotation speed of the supply / exhaust fan corresponding to the burner combustion amount, and a drive means for driving the supply / exhaust fan based on the rotation setting means. Drive data output means for outputting the data, and a rotation drive means for driving the air supply / exhaust fan based on the output of the drive data output means,
Detection means for detecting the rotation speed of the air supply / exhaust fan, comparison means for comparing the output of this detection means with the output of the rotation setting means, and drive data when the rotation speed of the air supply / exhaust fan is equal to or lower than the reference rotation speed. The data of the output means is changed to drive the air supply / exhaust fan at the reference rotation speed, and the control means allows this rotation speed when the rotation speed of the air supply / exhaust fan is equal to or higher than the reference rotation speed.
(ホ)作用 上述のように、電源電圧の低下、排気通路の流路抵抗の
増加、ファンモータ自体の回転抵抗の増加等に起因し
て、給排気ファンの回転数が上記基準回転数以下とな
り、バーナへの給気量が減少した時には、回転数を基準
回転数になるよう制御することにより、バーナへの給気
量の減少を補うことができ、不完全燃焼を防止できる。(E) Action As described above, the supply / exhaust fan rotation speed becomes less than the above-mentioned reference rotation speed due to the decrease in power supply voltage, increase in exhaust passage flow resistance, increase in rotation resistance of the fan motor itself, etc. When the amount of air supplied to the burner decreases, the rotation speed is controlled to the reference number of revolutions, so that the decrease in the amount of air supplied to the burner can be compensated for and incomplete combustion can be prevented.
また、風等による吸気通路の詰まり等に起因して、給排
気ファンへの負担が軽減して回転数が上記基準回転数以
下となった時には、この回転数を補正することなく、上
記の状態のまま回転を許容することにより、バーナへの
給気量を設定値に近い風量に維持することができ、不完
全燃焼を防止できる。In addition, when the load on the air supply / exhaust fan is reduced due to clogging of the intake passage due to wind, etc., and the number of revolutions becomes below the reference number of revolutions, this state is not corrected without correcting By allowing the rotation as it is, the amount of air supplied to the burner can be maintained at an air amount close to the set value, and incomplete combustion can be prevented.
(へ)実施例 本発明の実施例を先ず第１図に基づき説明すると、(1)
は屋外設置型の強制給排気式ガス給湯機で、熱交換器
(2)を加熱するガスバーナ(3)への燃料流路(4)に、ガバ
ナ(5)、比例制御弁(6)、電磁弁(7)を設けていると共
に、熱交換器(2)の周囲に吸気通路(8)を区画形成し、排
気通路(9)に強制給排気用の給排気ファン(10)を設け、
かつ吸気通路(8)、排気通路(9)には給排気トップ(11)を
連結している。(E) Example An example of the present invention will be described first with reference to FIG.
Is an outdoor-installed forced air supply / exhaust type gas water heater.
In the fuel flow path (4) to the gas burner (3) that heats (2), the governor (5), the proportional control valve (6), the solenoid valve (7) are provided, and the heat exchanger (2) The intake passage (8) is formed in the surrounding area, and the exhaust passage (9) is provided with a supply / exhaust fan (10) for forced supply / exhaust.
In addition, a supply / exhaust top (11) is connected to the intake passage (8) and the exhaust passage (9).
(12)は商用電源で、上記給排気ファン(8)を駆動するフ
ァンモータ(13)にトライアック(14)を介して接続してい
ると共に、降圧用トランス(15)を接続している。尚上記
トライアック(14)のゲートにはフオトサイリスタ(16)(1
6)を接続している。A commercial power source (12) is connected to a fan motor (13) for driving the supply / exhaust fan (8) via a triac (14) and a step-down transformer (15). The gate of the triac (14) above is equipped with a photo thyristor (16) (1
6) is connected.
(17)は上記降圧用トランス(15)の２次巻線(15)′に接続
した直流定電圧電源で、出力に電源周波数に同期した三
角波発生回路(18)及びマイコン(19)等を接続している。(17) is a DC constant voltage power supply connected to the secondary winding (15) 'of the step-down transformer (15), and connected to the output is a triangular wave generation circuit (18) and a microcomputer (19) synchronized with the power supply frequency. is doing.
(20)は図示しないフオトカプラ等を用いて上記ファンモ
ータ(13)の回転を回転数に応じたパルスに変換する検出
手段である回転数検出回路で、出力を上記マイコン(19)
の入力ポート(21)に接続している。(20) is a rotation speed detection circuit which is a detection means for converting the rotation of the fan motor (13) into a pulse corresponding to the rotation speed by using a photo coupler or the like (not shown).
Connected to the input port (21) of.
(22)は上記マイコン(19)の出力ポート(23)に接続したＤ
／Ａ変換器で、出力をバッファ用オペアンプ(24)を介し
て一方の入力に上記三角波発生回路(18)の出力を接続し
たコンパレータ(25)の他方の入力に接続しており、この
コンパレータ(25)の出力には上記フオトサイリスタ(16)
(16)とペアのＬＥＤ(16)′(16)′を駆動する駆動用トラ
ンジスタ(26)を接続し、これらにて回転駆動手段(27)を
構成している。(22) is a D connected to the output port (23) of the microcomputer (19)
In the A / A converter, the output is connected to the other input of the comparator (25) in which the output of the triangular wave generating circuit (18) is connected to one input via the buffer operational amplifier (24). The output of (25) is the above photo thyristor (16).
A driving transistor (26) for driving the LED (16) '(16)' paired with (16) is connected, and these constitute a rotation driving means (27).
又上記マイコン(19)は周知の様にＣＰＵ(28)、ＲＯＭ(2
9)、ＲＡＭ(30)から主に構成し、このＣＰＵ(28)と、Ｒ
ＯＭ(29)にて上記バーナ(3)の燃焼量である比例制御弁
(6)の開度に対応した給排気ファン(10)の回転数を複数
段階的に設定する回転設定手段を構成している。そして
ＣＰＵ(28)とＲＡＭ(30)にて、上記回転設定手段による
給排気ファン(10)駆動用のデータを上記回転駆動手段(2
7)に出力する駆動データ出力手段を構成し、かつこの駆
動データ出力手段のデータは、ＣＰＵ(28)にて上記検出
手段である回転数検出回路(20)の出力と上記回転設定手
段の出力との比較結果により更新し、比較手段を構成し
ている。As is well known, the microcomputer (19) has a CPU (28) and a ROM (2
9), RAM (30) mainly composed of this CPU (28) and R
Proportional control valve that is the combustion amount of the burner (3) at the OM (29)
A rotation setting means for setting the rotation speed of the air supply / exhaust fan (10) corresponding to the opening degree of (6) in a plurality of steps is configured. Then, in the CPU (28) and the RAM (30), the data for driving the air supply / exhaust fan (10) by the rotation setting means is transferred to the rotation driving means (2
The drive data output means for outputting to 7), and the data of this drive data output means is output by the CPU (28) from the rotation speed detection circuit (20) which is the detection means and the output from the rotation setting means. It is updated according to the result of comparison with and forms a comparison means.
また、このＣＰＵ(28)は前記給排気ファン(10)の回転数
が上記回転設定手段の出力以下の時に駆動データ出力手
段のデータを変更して給排気ファン(10)を上記回転設定
手段の出力にて駆動するようにするとともに、給排気フ
ァン(10)の回転数が上記回転設定手段の出力以上の時に
この回転数を許容する制御手段を兼ねている。The CPU (28) changes the data of the drive data output means to change the supply / exhaust fan (10) to the rotation setting means when the rotation speed of the supply / exhaust fan (10) is less than the output of the rotation setting means. In addition to being driven by the output, it also serves as control means for permitting this rotation speed when the rotation speed of the air supply / exhaust fan (10) is equal to or higher than the output of the rotation setting means.
而して出湯操作によってガスバーナ(3)を燃焼すると共
に、図示しない出湯温度を検出するセンサ及び出湯温度
を設定する温度設定器等よりマイコン(19)に温度情報を
取り込み、これらに基づいて比例制御弁(6)を制御し、
設定の出湯温度が得られる様にガスバーナ(3)の燃焼量
を制御する。Then, the gas burner (3) is burned by the hot water discharge operation, and temperature information is taken into the microcomputer (19) from a sensor (not shown) that detects the hot water temperature and a temperature setting device that sets the hot water temperature, and proportional control is performed based on these information. Controlling the valve (6),
The combustion amount of the gas burner (3) is controlled so that the set outlet temperature is obtained.
一方上記給排気ファン(9)は第２図にても示す様にマイ
コン(19)の図示しない入力ポートにて上記比例制御弁
(6)の開度を取り込み、この開度に応じて予め記憶して
いる回転数データを上記ＲＯＭ(29)より取り込み、その
結果を駆動データ出力手段より出力し、その出力を出力
ポート(23)よりＤ／Ａ変換器(22)に出力し、上記回転駆
動手段(27)を介して給排気ファン(10)のファンモータ(1
3)を回転制御する。尚上記回転数データは例えば１００
０r・p・m／２０００r・p・m／2,500r・p・m／3,000r・p・m等に
複数段階的に設定している。On the other hand, the intake / exhaust fan (9) is connected to the proportional control valve at the input port (not shown) of the microcomputer (19) as shown in FIG.
The opening of (6) is taken in, the rotation speed data stored in advance in accordance with this opening is taken in from the ROM (29), the result is output from the drive data output means, and the output is output to the output port (23 ) Output to the D / A converter (22), and the fan motor (1) of the air supply / exhaust fan (10) through the rotation driving means (27).
3) Rotation control. The rotation speed data is, for example, 100
0r ・ p ・ m / 2000r ・ p ・ m / 2,500r ・ p ・ m / 3,000r ・ p ・ m etc. are set in multiple stages.
更に上記ファンモータ(13)の回転数を入力ポート(21)に
て取り込み、これが上記の場合の最低回転数1,000r・p・m
よりもかなり低い例えば５００r・p・m以下、又は最高回
転数3.000r・p・mよりかなり高い3,500r・p・m以上の場合に
は異常と判断して器具の作動を停止する。Furthermore, the rotation speed of the fan motor (13) is taken in at the input port (21), and this is the minimum rotation speed of 1,000 r ・ p ・ m in the above case.
If it is considerably lower than, for example, 500 r · p · m or lower, or if it is 3,500 r · p · m or higher, which is considerably higher than the maximum rotational speed of 3.000 r · p · m, it is judged to be abnormal and the operation of the instrument is stopped.
又上記回転数が設定回転数の例えば−１００r・p・m以下
であれば、範囲内に成る様に出力ポート(23)からの出力
データを変更する。尚風によって吸気通路(8)に負圧が
生じた場合等の様に、吸気通路(8)の吸気抵抗が増加す
ると、給排気ファン(10)の回転数が設定回転数よりも上
昇するが、この場合には上記出力ポート(23)からの出力
データを変更せず、ＲＯＭ(29)に記憶した比例制御弁
(6)の開度に対応した回転数データにて駆動する。If the number of revolutions is equal to or less than the set number of revolutions, for example, -100r · p · m, the output data from the output port (23) is changed so as to be within the range. If the intake resistance of the intake passage (8) increases, such as when negative pressure is generated in the intake passage (8) due to wind, the rotation speed of the air supply / exhaust fan (10) rises above the set rotation speed. , In this case, the output data from the output port (23) is not changed and the proportional control valve stored in the ROM (29)
Drive with the rotation speed data corresponding to the opening of (6).
(ト)発明の効果 本発明は上述したように構成することにより、電源電圧
の低下、排気通路の流路抵抗の増加、ファンモータ自体
の回転抵抗の増加等に起因して、給排気ファンの回転数
が上記基準回転数以下となり、バーナへの給気量が減少
した時に回転数を基準回転数になるよう制御することに
より、バーナへの給気量の減少を補うことができ、不完
全燃焼を防止できる。(G) Effect of the Invention By the configuration of the present invention as described above, due to a decrease in the power supply voltage, an increase in the flow path resistance of the exhaust passage, an increase in the rotation resistance of the fan motor itself, etc. By controlling the rotation speed to the reference rotation speed when the rotation speed becomes less than the reference rotation speed and the supply air amount to the burner decreases, it is possible to compensate for the decrease in the supply air amount to the burner. Combustion can be prevented.
また、風等による吸気通路の詰まり等に起因して、給排
気ファンへの負担が軽減して回転数が上記基準回転数以
上となった時に、この回転数を補正することなく、上記
の状態のまま回転を許容することにより、バーナへの給
気量を設定値に近い風量に維持することができ、不完全
燃焼を防止できる。Further, when the load on the air supply / exhaust fan is reduced due to the clogging of the intake passage due to wind, etc., and the rotation speed becomes equal to or higher than the reference rotation speed, the above-described state is not corrected. By allowing the rotation as it is, the amount of air supplied to the burner can be maintained at an air amount close to the set value, and incomplete combustion can be prevented.
第１図は本発明を用いたガス給湯機の概略図、第２図は
同じくチャート図である。 (3)…ガスバーナ、(10)…給排気ファン、(19)…マイコ
ン、(20)…回転数検出回路（検出手段）、(27)…回転駆
動手段、(28)…ＣＰＵ（比較手段、制御手段）。FIG. 1 is a schematic diagram of a gas water heater using the present invention, and FIG. 2 is a chart diagram of the same. (3) ... Gas burner, (10) ... Air supply / exhaust fan, (19) ... Microcomputer, (20) ... Rotation speed detection circuit (detection means), (27) ... Rotation drive means, (28) ... CPU (comparison means, Control means).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 西本 俊也 鳥取県鳥取市南▲吉▼方３丁目201番地 鳥取三洋電機株式会社内 (56)参考文献 特開 昭60−64122（ＪＰ，Ａ) 特開 昭59−86819（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiya Nishimoto 3-201, Minami-Kichikata, Tottori City, Tottori Prefecture, Sanyo Denki Co., Ltd. (56) References JP-A-60-64122 (JP, A) Kai 59-86819 (JP, A)
Claims (1)
基準回転数を設定する回転設定手段と、この回転設定手
段に基づいて上記給排気ファン駆動用のデータを出力す
る駆動データ出力手段と、この駆動データ出力手段の出
力に基づいて給排気ファンを駆動する回転駆動手段と、
上記給排気ファンの回転数を検出する検出手段と、この
検出手段の出力と回転設定手段の出力とを比較する比較
手段と、前記給排気ファンの回転数が上記基準回転数以
下の時に駆動データ出力手段のデータを変更して給排気
ファンを基準回転数にて駆動するとともに、給排気ファ
ンの回転数が上記基準回転数以上の時にこの回転数を許
容する制御手段とから成る燃焼制御装置。1. A rotation setting means for setting a reference rotation speed of a supply / exhaust fan corresponding to a combustion amount of a burner, and a drive data output means for outputting data for driving the supply / exhaust fan based on the rotation setting means. A rotary drive means for driving the air supply / exhaust fan based on the output of the drive data output means,
Detection means for detecting the rotation speed of the air supply / exhaust fan, comparison means for comparing the output of this detection means with the output of the rotation setting means, and drive data when the rotation speed of the air supply / exhaust fan is equal to or lower than the reference rotation speed. A combustion control device comprising: control means for changing the data of the output means to drive the supply / exhaust fan at a reference rotation speed, and permitting this rotation speed when the rotation speed of the supply / exhaust fan is at or above the reference rotation speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009359A JPH0637975B2 (en) | 1986-01-20 | 1986-01-20 | Combustion control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61009359A JPH0637975B2 (en) | 1986-01-20 | 1986-01-20 | Combustion control device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23962793A Division JPH06221552A (en) | 1993-09-27 | 1993-09-27 | Combustion controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62169929A JPS62169929A (en) | 1987-07-27 |
| JPH0637975B2 true JPH0637975B2 (en) | 1994-05-18 |
Family
ID=11718276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61009359A Expired - Lifetime JPH0637975B2 (en) | 1986-01-20 | 1986-01-20 | Combustion control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637975B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1281658B1 (en) * | 1996-01-12 | 1998-02-26 | Ocean Idroclima S P A | DEVICE FOR OPTIMIZING THE PERFORMANCE OF A GASEOUS FUEL HEAT GENERATOR |
| JP3485036B2 (en) * | 1999-08-04 | 2004-01-13 | 三菱電機株式会社 | Combustion control device |
| JP6487691B2 (en) * | 2014-12-19 | 2019-03-20 | パーパス株式会社 | Combustion apparatus and combustion method |
| ES2735200T3 (en) | 2016-08-31 | 2019-12-17 | Wuhu Midea Kitchen & Bath Appliances Mfg Co Ltd | Gas water heater and safety control system and associated procedure |
| JP7554668B2 (en) * | 2020-12-28 | 2024-09-20 | リンナイ株式会社 | Combustion equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6064122A (en) * | 1983-09-20 | 1985-04-12 | Omron Tateisi Electronics Co | Burning control device |
-
1986
- 1986-01-20 JP JP61009359A patent/JPH0637975B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62169929A (en) | 1987-07-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |