JPH01167525A - Post-purge controller for burner - Google Patents
Post-purge controller for burnerInfo
- Publication number
- JPH01167525A JPH01167525A JP62325819A JP32581987A JPH01167525A JP H01167525 A JPH01167525 A JP H01167525A JP 62325819 A JP62325819 A JP 62325819A JP 32581987 A JP32581987 A JP 32581987A JP H01167525 A JPH01167525 A JP H01167525A
- Authority
- JP
- Japan
- Prior art keywords
- combustion
- timer
- time
- signal
- fan motor
- 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.)
- Granted
Links
- 238000010926 purge Methods 0.000 title claims abstract description 32
- 238000002485 combustion reaction Methods 0.000 claims abstract description 90
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000000446 fuel Substances 0.000 claims description 6
- 238000007664 blowing Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009499 grossing Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 1
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
- F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2227/00—Ignition or checking
- F23N2227/06—Postpurge
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2235/00—Valves, nozzles or pumps
- F23N2235/12—Fuel valves
- F23N2235/14—Fuel valves electromagnetically operated
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- 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、ガスや石油等を燃料とし、燃焼を行なう暖房
機、給湯機を主とし、各分野の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 combustion devices in various fields, mainly heating machines and water heaters that use gas, oil, etc. as fuel and perform combustion.
従来の技術
近年、燃焼器具のポストパージ制御装置は、マイクロコ
ンピュータ等、電゛子技術の導入により、従来の器体温
度をバイメタルスイッチにより検出し、ポストパージ制
御を行なう装置から、マイクロコンピュータ等の内部タ
イマにより一定時間だけポストパージを行なう制御方式
に移行しつつあシ、マイクロコンピュータ等の電子技術
を使用したポストパージ制御が重要視されている。Conventional technology In recent years, post-purge control devices for combustion appliances have changed from conventional devices that detect the body temperature using a bimetal switch and perform post-purge control, to the introduction of electronic technology such as microcomputers. With the shift to a control system in which post-purge is performed for a fixed period of time using an internal timer, post-purge control using electronic technology such as a microcomputer is becoming more important.
以下図面を参照しながら上述した従来の燃焼器具のポス
トパージ制御装置の一例について説明する。An example of the conventional post-purge control device for the above-mentioned combustion appliance will be described below with reference to the drawings.
第２図は従来の燃焼器具のポストパージ制御装置のブロ
ック図を示すものである。１はコンセント、２は送風用
ファンである。３はファンモータ駆動部であシ、送風用
ファン２を駆動する。４はトランスである。５は整流器
であシ、交流電源を全波整流している。６は平滑用コン
デンサであシ、整流器５で得られた直流電源の平滑化を
行なっている。７は抵抗である。８は運転スイッチであ
シ、器具の入切を行なう。９は判定部であシ、運転スイ
ッチ８の信号により、器具の動作を判定し制御する。１
０は燃焼制御部であシ運転スイッチ８の信号により燃焼
制御を行なう。１１はファンモータ制御部であシ、ファ
ンモータ駆動部３に制御信号を出力する。１２は遅延タ
イマでアシ、運転スイッチ８が切になって後、一定時間
ファンモータ制御部１１を動作させる信号を出力してい
る。判定部９は燃焼制御部１０、ファンモータ制御部１
１、遅延タイマ１２で構成されている。１３は点火器で
ある。１４は電磁弁でお多、燃焼制御部１０からの信号
で燃料の供給を入切する。１５はバーナである。FIG. 2 shows a block diagram of a conventional post-purge control device for a combustion appliance. 1 is an outlet, and 2 is a fan for blowing air. 3 is a fan motor drive unit, which drives the ventilation fan 2. 4 is a transformer. 5 is a rectifier, which performs full-wave rectification of the AC power source. A smoothing capacitor 6 smoothes the DC power obtained by the rectifier 5. 7 is resistance. 8 is the operation switch, which turns the appliance on and off. Reference numeral 9 denotes a determination unit which determines and controls the operation of the appliance based on the signal from the operation switch 8. 1
0 is a combustion control section that performs combustion control based on a signal from an operation switch 8. A fan motor control section 11 outputs a control signal to the fan motor drive section 3. A delay timer 12 outputs a signal to operate the fan motor control section 11 for a certain period of time after the operation switch 8 is turned off. The determination unit 9 includes a combustion control unit 10 and a fan motor control unit 1.
1, a delay timer 12. 13 is an igniter. Reference numeral 14 denotes a solenoid valve that turns on and off the supply of fuel in response to a signal from the combustion control section 10. 15 is a burner.
以上のように構成された燃焼された燃焼器具のポストパ
ージ制御装置について、以下その動作を説明する。The operation of the post-purge control device for a combustion appliance configured as described above will be described below.
まず、コンセント１を介して得られた商用電源は、トラ
ンス４で降圧され、整流器５で全波整流された後、平滑
用コンデンサ６により平滑された直流となる。前記方法
で得られた直流電源を用いて後記の制御を行なう。運転
スイッチ８を入とすれば燃焼制御部１０及び、ファンモ
ータ制御部１１に信号が送られ、各々点火器１３、電磁
弁・１４を動作させ、バーナ１５により燃焼を開始する
。あるいは、ファンモータ駆動部３を動作させ、送風用
ファン２を駆動させる。次に運転スイッチ８を切とすれ
ば、燃焼制御部１０は運転スイッチ８の切信号を受け、
電磁弁１４を停止させ、燃焼を停止させる。遅延タイマ
１２は運転スイッチ８を切とすれば、ファンモータ制御
部１１に運転信号を出力し、運転スイッチ８が切にも関
わらず、一定時間送風用フプン２を回転させ、器体の異
常加熱を防止している。First, commercial power obtained through the outlet 1 is stepped down by the transformer 4, full-wave rectified by the rectifier 5, and then smoothed by the smoothing capacitor 6 to become direct current. The control described later is performed using the DC power source obtained by the above method. When the operation switch 8 is turned on, a signal is sent to the combustion control section 10 and the fan motor control section 11, which operate the igniter 13 and solenoid valve 14, respectively, and start combustion by the burner 15. Alternatively, the fan motor drive section 3 is operated to drive the ventilation fan 2. Next, when the operation switch 8 is turned off, the combustion control section 10 receives the OFF signal from the operation switch 8,
The solenoid valve 14 is stopped to stop combustion. When the operation switch 8 is turned off, the delay timer 12 outputs an operation signal to the fan motor control section 11 and rotates the fan 2 for a certain period of time even though the operation switch 8 is turned off, thereby preventing abnormal heating of the device. is prevented.
発明が解決しようとする問題点
しかしながら上記のような構成では、運転スイッチ８の
入切のみで遅延タイマ１２が動作し、器体加熱や、器具
の燃焼の有無に無関係に送風用ファン２が動作するため
、冷たい風が器具よシ出され、特に暖房機においては冷
風感として、使用感を低減するという問題点を有してい
た。Problems to be Solved by the Invention However, in the above configuration, the delay timer 12 operates only when the operation switch 8 is turned on and off, and the blower fan 2 operates regardless of whether or not the vessel is heated or the appliance is combusted. As a result, cold air is blown out of the appliance, which has the problem of reducing the feeling of use, especially in heaters, due to the feeling of cold air.
本発明は上記問題に鑑み、ポストパージにおいて冷風感
を与えず、また、器体の加熱を防止する様、送風用ファ
ンを動作させる燃焼器具のポストパージ制御装置を提供
するものである。In view of the above-mentioned problems, the present invention provides a post-purge control device for a combustion appliance that operates a blower fan so as not to give a feeling of cold air during post-purge and to prevent heating of the vessel body.
問題点を解決するための手段
上記問題点を解決するために本発明の燃焼器具のポスト
パージ制御装置は、器具の動作を入切する運転スイッチ
と、前記運転スイッチの入切信号を判定し各部を制御す
る判定部と、前記判定部からの燃焼制御信号により燃料
の供給を入切する電磁弁及び、燃料への点火を行なう点
火器と、同じく前記判定部からのファンモータ制御信号
により動作するファンモータ駆動部と、前記電磁弁及び
前記点火器が動作時に燃焼を行なうバーナと、前記バー
ナにおける炎信号を電気信号とし、判定部に伝達する燃
焼センサと、前記ファンモータ駆動部により制御され、
送風を行なう送風用ファンとを有し、前記判定部は、前
記運転スイッチの入信号により動作し、燃焼制御信号を
出力する燃焼制御部と、同じく前記運転スイッチの入信
号により前記ファンモータ駆動部に出力するファンモー
タ制御部と、前記燃焼センサの電気信号により、燃焼の
有無を検出する燃焼検出部と、前記燃焼検出部によ）燃
焼器と判定された時間をカウントする燃焼タイマと、前
記燃焼タイマで得られる時間を演算し、器具に適したタ
イマ長さとする演算部と、前記演算部で演算されｔコタ
イマ長さを記憶し、前記運転スイッチが切状態となった
際に、前記ファンモータ制御部に動作信号を記憶された
一定時間、出力する遅延タイマを有するという構成を備
えたものである。Means for Solving the Problems In order to solve the above-mentioned problems, the post-purge control device for combustion appliances of the present invention includes an operation switch that turns on and off the operation of the appliance, and an operation switch that determines the on/off signal of the operation switch and controls each part. an electromagnetic valve that turns on and off the supply of fuel according to a combustion control signal from the determination section; an igniter that ignites the fuel; and a fan motor control signal that also operates according to the determination section. controlled by a fan motor drive unit, a burner in which combustion occurs when the solenoid valve and the igniter operate, a combustion sensor that converts a flame signal in the burner into an electric signal and transmits it to a determination unit, and the fan motor drive unit,
and a blower fan that blows air, and the determination unit operates in response to an input signal from the operation switch and outputs a combustion control signal, and the determination unit also operates in response to an input signal from the operation switch to control the fan motor drive unit. a combustion detection section that detects the presence or absence of combustion based on an electric signal from the combustion sensor; a combustion timer that counts the time when the combustion sensor determines that the combustion sensor is in the combustor; a calculation unit that calculates the time obtained by the combustion timer and sets the timer length to a timer length suitable for the appliance; and a calculation unit that stores the tco timer length calculated by the calculation unit, and when the operation switch is turned off, the fan The motor control unit has a delay timer that outputs an operating signal for a predetermined period of time stored in the motor control unit.
作 用
本発明は上記した構成によって燃焼時間を検出し、その
燃焼時間を演算した値をもって、ポストパージの時間と
している為、燃焼時間に合わせたポストパージ時間が得
られ、冷風感、器体の異常加熱が防止できることとなる
。Function: The present invention detects the combustion time using the above-mentioned configuration, and uses the calculated value of the combustion time as the post-purge time. Therefore, the post-purge time can be obtained in accordance with the combustion time, reducing the feeling of cold air and the damage to the vessel body. Abnormal heating can be prevented.
実施例
以下本発明の一実施例の燃焼器具のポストパージ制御装
置について図面を参照しながら説明する。EXAMPLE Hereinafter, a post-purge control device for a combustion appliance according to an example of the present invention will be described with reference to the drawings.
第１図は本発明の燃焼器具のポストパージ制御装置のブ
ロック図を示すものである。FIG. 1 shows a block diagram of a post-purge control device for a combustion appliance according to the present invention.
まず、商用電源はコンセント１６を介して回路に取シ込
まれ、トランス１９で降圧され、整流器２０で全波整流
された後、平滑用コンデンサ２１により平滑され、直流
となる。このようにして得られた直流により、制御を行
なう。運転スイッチ２３を入とすれば、燃焼制御部２５
及びファンモータ制御部２９に信号が送られ、各々、点
火器２６、電磁弁２７を動作させ、バーナ２８により燃
焼を開始させる。あるいは、ファンモータ駆動部１８を
動作させ、送風用ファン１７を駆動させる。燃焼してい
る状態を燃焼センサ３０によりミ無信号に変換し、燃焼
検出部３１に送る。燃焼検出部３１は、燃焼センサａＯ
からの電気信号により、燃焼判定時のみ燃焼タイマ３２
に出力し、燃焼時期をカウントさせる。演算部３３は、
燃焼タイマ３２の値を演算し、燃焼時間に見合ったポス
トパージ時間（ｙ＝ａ（マ＋ｂ、ｂ≦ｙ≦Ｃ）を遅延タ
イマ３４にカウントさせる（なお、前記のａ、ｂ、ｃ；
定数、ｘ；燃焼時間、ｙ；ポストパージ時間）。次に運
転スイッチ２３を切とすれば、燃焼制御部２５は運転ス
イッチ２３の切信号を受け、電磁弁２７を停止させる。First, commercial power is introduced into the circuit through the outlet 16, stepped down by the transformer 19, full-wave rectified by the rectifier 20, and then smoothed by the smoothing capacitor 21 to become direct current. Control is performed using the direct current obtained in this way. When the operation switch 23 is turned on, the combustion control section 25
A signal is sent to the fan motor control unit 29, which operates the igniter 26 and the solenoid valve 27, respectively, and causes the burner 28 to start combustion. Alternatively, the fan motor drive section 18 is operated to drive the ventilation fan 17. The combustion state is converted into a no signal by the combustion sensor 30, and the signal is sent to the combustion detection section 31. The combustion detection unit 31 includes a combustion sensor aO
The combustion timer 32 is activated only when combustion is determined by the electric signal from
output to count the combustion timing. The calculation unit 33 is
The value of the combustion timer 32 is calculated, and the delay timer 34 is made to count the post-purge time (y=a(ma+b, b≦y≦C) corresponding to the combustion time (a, b, c;
constant, x; combustion time, y; postpurge time). Next, when the operating switch 23 is turned off, the combustion control section 25 receives the off signal from the operating switch 23 and stops the solenoid valve 27.
遅延タイマ３４は、運転スイッチ２３を切とすれば、運
転スイッチ２３を人としている間に算出されたポストパ
ージ時間中、ファンモータ制御部２９に運転信号を出力
し、運転スイ・ツチ２ａが切にも関わらず、燃焼時間に
見合った一定時間、送風用ファン１７を回転させる。When the operation switch 23 is turned off, the delay timer 34 outputs an operation signal to the fan motor control section 29 during the post-purge time calculated while the operation switch 23 is turned off, and the operation switch 2a is turned off. Nevertheless, the blower fan 17 is rotated for a certain period of time commensurate with the combustion time.
第３図は本発明のポストパージ制御をあられした図で、
実線のカーブが本発明であシ、これを間にして上下の点
線で示すカーブの範囲であれば本発明の目的をはたす良
好域であ−る。二点鎖線は従来のポストパージをあられ
し、燃焼時間に関係なく一定である。Figure 3 is a diagram showing the post-purge control of the present invention.
The curve shown by the solid line corresponds to the present invention, and the range between the curves indicated by the upper and lower dotted lines is a good range in which the object of the present invention can be achieved. The two-dot chain line represents conventional post-purge and is constant regardless of combustion time.
以上のように本実施例によれば、炎信号を電気信号に変
換する燃焼センサ３０と、燃焼センサ３０からの電気信
号により、燃焼検出する燃焼検出部３１と、燃焼時間を
カウントする燃焼タイマ３２と、燃焼時間に見合ったポ
ストパージ時間を算出する演算部３３と、演算部３３で
得られたポストパージ時間中、運転スイッチ２ａが切と
なっても、ファンモータ制御部２９に運転信号を出力す
る遅延タイマ３４を設ける事により、ポストパージ中の
冷風感や、器具の異常過熱を防止することができる。As described above, according to this embodiment, there is a combustion sensor 30 that converts a flame signal into an electrical signal, a combustion detection unit 31 that detects combustion based on the electrical signal from the combustion sensor 30, and a combustion timer 32 that counts combustion time. and a calculation unit 33 that calculates a post-purge time commensurate with the combustion time, and outputs an operation signal to the fan motor control unit 29 even if the operation switch 2a is turned off during the post-purge time obtained by the calculation unit 33. By providing the delay timer 34, it is possible to prevent the feeling of cold air during post-purge and abnormal overheating of the equipment.
発明の効果
以上のように本発明は、器具に適したポストパージ時間
を燃焼時間との相関でとらえることにより、器体の異常
過熱や、冷たい風が器具から出される事がなく、特に暖
房器においては良好なポストパージ中の体感が得られる
。Effects of the Invention As described above, the present invention prevents abnormal overheating of the container and prevents cold air from being emitted from the device by determining the appropriate post-purge time for the device in relation to the combustion time. A good post-purge experience can be obtained.
第１図は、本発明の実施例における燃焼器具のポストパ
ージ制御装置のブロック図、第２図は従来の実施例にお
ける燃焼器具のポストパージ制御装置のブロック図、第
３図は、本発明における効果を従来例との比較において
グラフ化した図である。
１８・・・・・・ファンモータ駆動部、２４・・・・・
・判定部、２５・・・・・・燃焼制御部、ａＯ・・・・
・・燃焼センサ、３１・・・・・・燃焼検出部、ａ２・
・・・・・燃焼タイマ、３３・・・・・・演算部、３４
・・・・・・遅延タイマ。
はドズＹノぐ−ヅ時閾
’＋’ 、
−！
虞
汁FIG. 1 is a block diagram of a post-purge control device for a combustion appliance in an embodiment of the present invention, FIG. 2 is a block diagram of a post-purge control device for a combustion appliance in a conventional embodiment, and FIG. 3 is a block diagram of a post-purge control device for a combustion appliance in an embodiment of the present invention. FIG. 3 is a graph showing the effects in comparison with a conventional example. 18...Fan motor drive section, 24...
- Judgment unit, 25... Combustion control unit, aO...
... Combustion sensor, 31... Combustion detection section, a2.
... Combustion timer, 33 ... Calculation section, 34
...Delay timer. The threshold is '+',
-! Juice
Claims (1)
チの入切信号を判定し各部を制御する判定部と、前記判
定部からの燃焼制御信号により燃料の供給を入切する電
磁弁及び、燃料への点火を行なう点火器と、同じく前記
判定部からのファンモータ制御信号により動作するファ
ンモータ駆動部と、前記電磁弁及び前記点火器が動作時
に燃焼を行なうバーナと、前記バーナにおける炎信号を
電気信号とし、判定部に伝達する燃焼センサと、前記フ
ァンモータ駆動部により制御され、送風を行なう送風用
ファンとを有し、前記判定部は、前記運転スイッチの入
信号により動作し、燃焼制御信号を出力する燃焼制御部
と、同じく前記運転スイッチの入信号により前記ファン
モータ駆動部に出力するファンモータ制御部と、前記燃
焼センサの電気信号により、燃焼の有無を検出する燃焼
検出部と、前記燃焼検出部により燃焼有と判定された時
間をカウントする燃焼タイマと、前記燃焼タイマで得ら
れる時間をｙ＝ａ√ｘ＋ｂ、（ｂ≦ｙ≦ｃ）となるよう
に演算し、器具に適したタイマ長さとする演算部と、前
記演算部で演算されたタイマ長さを記憶し、前記運転ス
イッチが切状態となった際に、前記ファンモータ制御部
に動作信号を記憶された一定時間、出力する遅延タイマ
とを備えた燃焼器具のポストパージ制御装置。 （但し、ａ、ｂ、ｃ；定数、ｘ；燃焼時間、ｙ；ポスト
パージ時間）[Scope of Claims] An operation switch that turns on and off the operation of the appliance, a determination unit that determines the on/off signal of the operation switch and controls each part, and a combustion control signal from the determination unit that turns on and off the supply of fuel. an igniter that ignites the fuel; a fan motor drive unit that similarly operates according to a fan motor control signal from the determination unit; and a burner that performs combustion when the solenoid valve and the igniter operate; It has a combustion sensor that uses a flame signal in the burner as an electric signal and transmits it to a determination section, and a blower fan that is controlled by the fan motor drive section and blows air, and the determination section is configured to receive an input signal of the operation switch. a combustion control section that operates and outputs a combustion control signal; a fan motor control section that also outputs an output to the fan motor drive section in response to an input signal from the operation switch; and an electric signal from the combustion sensor to detect the presence or absence of combustion. a combustion detection unit that counts the time when combustion is determined to be present by the combustion detection unit, and a combustion timer that counts the time when combustion is determined to be present by the combustion detection unit, and the time obtained by the combustion timer so that y=a√x+b, (b≦y≦c). a calculation unit that calculates a timer length suitable for the appliance; a calculation unit that stores the timer length calculated by the calculation unit; and sends an operation signal to the fan motor control unit when the operation switch is turned off; A post-purge control device for a combustion appliance, comprising a delay timer that outputs a stored fixed period of time. (However, a, b, c: constant, x: combustion time, y: post purge time)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62325819A JP2600233B2 (en) | 1987-12-23 | 1987-12-23 | Post-purge control device for combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62325819A JP2600233B2 (en) | 1987-12-23 | 1987-12-23 | Post-purge control device for combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01167525A true JPH01167525A (en) | 1989-07-03 |
| JP2600233B2 JP2600233B2 (en) | 1997-04-16 |
Family
ID=18180951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62325819A Expired - Fee Related JP2600233B2 (en) | 1987-12-23 | 1987-12-23 | Post-purge control device for combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600233B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61280314A (en) * | 1985-06-04 | 1986-12-10 | Sanyo Electric Co Ltd | Combustion device |
| JPS62119360A (en) * | 1985-11-20 | 1987-05-30 | Matsushita Electric Ind Co Ltd | Warm air room heater |
-
1987
- 1987-12-23 JP JP62325819A patent/JP2600233B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61280314A (en) * | 1985-06-04 | 1986-12-10 | Sanyo Electric Co Ltd | Combustion device |
| JPS62119360A (en) * | 1985-11-20 | 1987-05-30 | Matsushita Electric Ind Co Ltd | Warm air room heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2600233B2 (en) | 1997-04-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |