JPH04198616A - Safety device of combustion apparatus - Google Patents

Safety device of combustion apparatus

Info

Publication number
JPH04198616A
JPH04198616A JP33231090A JP33231090A JPH04198616A JP H04198616 A JPH04198616 A JP H04198616A JP 33231090 A JP33231090 A JP 33231090A JP 33231090 A JP33231090 A JP 33231090A JP H04198616 A JPH04198616 A JP H04198616A
Authority
JP
Japan
Prior art keywords
heat
combustion
sensitive element
conductive pattern
plastic film
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
Application number
JP33231090A
Other languages
Japanese (ja)
Inventor
Yoshio Azegami
畔上 義男
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP33231090A priority Critical patent/JPH04198616A/en
Publication of JPH04198616A publication Critical patent/JPH04198616A/en
Pending legal-status Critical Current

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  • Control Of Combustion (AREA)

Abstract

PURPOSE:To improve the safety and reliability of a combustion apparatus by a method wherein a first plastic film of hot-melt type, a conductive pattern and a second plastic film are laminated to form a heat-sensitive element, and combustion is stopped according to the resistance between two terminals of the conductive pattern. CONSTITUTION:A combustion chamber 2 is enclosed in a easing 1, a burner 3 is installed under the combustion chamber 2, and a heat-sensitive element 15 is wound around the outer wall of the casing 1. When the heat-sensitive element 15 senses a specified temperature, the combustion of the burner 3 is stopped. The heat-sensitive element 15 consists of a first plastic film 24 of hot-melt type, a conductive pattern 25 provided on the first plastic film 24, and a second plastic film 26 covering the conductive pattern 25, and combustion is stopped according to the resistance between two terminals of the conductive pattern 25. Thereby, the single heat-sensitive element 15 is able to cope with the temperature rise in a wide area outside the combustion chamber 2, so that the reliability and safety can be improved.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 この発明はガスや灯油を燃料とする給湯機、暖房機等の
燃焼機の安全装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a safety device for combustion machines such as water heaters and space heaters that use gas or kerosene as fuel.

(ロ)従来の技術 この種の従来装置は例えば実公昭63−19722号公
報に開示きれているように、バーナと、このバーナを臨
ませた燃焼室と、この燃焼室の外部に取り付けられた感
熱素子とを備え、感熱素子が所定温度を感知したときに
バーナでの燃焼を停止させ、燃焼室壁の過熱を防止した
り、安全性を確保できるようにしている。
(b) Prior art As disclosed in, for example, Japanese Utility Model Publication No. 63-19722, a conventional device of this type includes a burner, a combustion chamber facing the burner, and a device attached to the outside of the combustion chamber. The combustion chamber is equipped with a heat-sensitive element, and when the heat-sensitive element senses a predetermined temperature, combustion in the burner is stopped to prevent overheating of the combustion chamber wall and ensure safety.

(ハ)発明が解決しようとする課題 ところで、上述した感熱素子には温度ヒユーズやバイメ
タルスイッチが使用されている。これらの感熱素子は燃
焼室外部の最も温度が高くなると思われる部分に取り付
けられているが、その部分の選定が難しいため、信頼性
の低いものであった。もちろん、このような感熱素子を
燃焼室の外壁に複数個取り付けるようにすれば、信頼性
を高めることができるが、反面、それぞれの感熱素子に
絶縁処理(ハーネス加工)を施さなければならず、コス
ト高になる欠点があった。特に、強制通風燃焼式のもの
では燃焼室が正圧になるため、高温腐食等に起因して燃
焼室壁に孔開きを生じると、燃焼ガスが外部に漏れる心
配があった。しかも、孔開きする場所は予想が難しいた
め、これを検出するには多数の感熱素子を必要とする問
題があった。
(c) Problems to be Solved by the Invention Incidentally, a temperature fuse or a bimetal switch is used as the above-mentioned heat-sensitive element. These heat-sensitive elements are attached to the part outside the combustion chamber where the temperature is expected to be the highest, but because it is difficult to select that part, their reliability has been low. Of course, reliability can be increased by attaching multiple such heat-sensitive elements to the outer wall of the combustion chamber, but on the other hand, each heat-sensitive element must be insulated (harnessed). It had the disadvantage of high cost. In particular, in the forced draft combustion type, the combustion chamber is under positive pressure, so if a hole is formed in the combustion chamber wall due to high-temperature corrosion or the like, there is a risk that combustion gas will leak to the outside. Moreover, since it is difficult to predict where the holes will form, there is a problem in that a large number of heat-sensitive elements are required to detect them.

この発明は上述した事実に鑑みてなされたもの手入 であり、1つの感i素子で燃焼室外部の広範囲の部分の
温度上昇に対処できるようにし、安全性、信頼性及び経
済性に優れた燃焼機の安全装置を提供することを目的と
する。
This invention was made in view of the above-mentioned facts, and it has been made possible to cope with the temperature rise in a wide area outside the combustion chamber with one i-sensing element, and has excellent safety, reliability, and economic efficiency. The purpose is to provide safety equipment for combustion machines.

(ニ)課題を解決するための手段 この発明では、バーナと、このバーナを臨ませた燃焼室
と、この燃焼室の外部に取り付けられた感熱素子とを備
え、感熱素子が所定温度を感知したときにバーナでの燃
焼を停止きせるものにおいて、感熱素子は熱溶解性の第
1のプラスチックフィルムと、第1のプラスチックフィ
ルムの上面に設けられた導電パターンと、この導電パタ
ーンを被覆する第2のプラスチックフィルムとからなり
、導電パターンの両端子間の電気抵抗に応じて燃焼を停
止きせる構成である。
(d) Means for Solving the Problems This invention includes a burner, a combustion chamber facing the burner, and a heat-sensitive element attached to the outside of the combustion chamber, and the heat-sensitive element senses a predetermined temperature. In a device that sometimes stops combustion in a burner, the heat-sensitive element includes a first heat-melting plastic film, a conductive pattern provided on the top surface of the first plastic film, and a second conductive pattern covering the conductive pattern. It consists of a plastic film and is configured to stop combustion depending on the electrical resistance between both terminals of the conductive pattern.

(ネ)作用 このように構成すると、1つの感熱素子を燃焼室の外部
に取り付けておくことにより、燃焼室外部の広範囲の部
分における異常温度を検知することができる。このため
、燃焼室外部の何れかの部分が所定温度以上になるか、
孔開きによって燃焼ガスが漏れた場合、熱溶解性の第1
のプラスチックフィルム溶解し、それに伴って導電パタ
ーンが破断される。このため、導電パターンの両端子間
の電気抵抗が変化し、バーナでの燃焼を停止させること
ができる。また、感熱素子(15)を取り付は場所に合
わせて任意の形状に成形できるはかりでなく、導電パタ
ーンの破断によって両端子間の電気抵抗が大きく変化す
るため、導電パターンに流す電流は微/J%で良く、導
電パターンが第2のプラスチックフィルムによって保N
許れているため、漏電や導電パターンの酸化による劣化
や傷付きによる破断を防止できるなと、安全性及び信頼
性に優れている。しかも、1つの感熱素子の絶縁処理を
行えば良いので、経済性にも優れている。
(f) Effect With this configuration, abnormal temperatures in a wide range of parts outside the combustion chamber can be detected by attaching one heat-sensitive element outside the combustion chamber. Therefore, whether any part of the outside of the combustion chamber reaches a predetermined temperature or
If combustion gas leaks due to hole opening, heat-soluble primary
The plastic film will melt and the conductive pattern will be broken. Therefore, the electrical resistance between both terminals of the conductive pattern changes, and combustion in the burner can be stopped. In addition, the heat-sensitive element (15) cannot be mounted on a scale that can be molded into an arbitrary shape to suit the location, and the electrical resistance between both terminals changes greatly due to breakage of the conductive pattern, so the current flowing through the conductive pattern is very small. J% is sufficient, and the conductive pattern is maintained by the second plastic film.
This allows for excellent safety and reliability, as it prevents electrical leakage, deterioration due to oxidation of the conductive pattern, and breakage due to scratches. Moreover, since it is only necessary to insulate one heat-sensitive element, it is also excellent in economical efficiency.

(へ)実施例 以下、この発明を図面に示す実施例について説明する。(f) Example Hereinafter, embodiments of the present invention shown in the drawings will be described.

第1図は強制給気式の給湯機を示すものである。第1図
において、(1)は内部に燃焼室(2)を形成するケー
シング(燃焼室壁)、(3)は燃焼室(2)の下部に臨
ませたバーナ、(4)は燃焼室(2)の上部に設けられ
た熱交換器である。(5)はケーシング(1)の外壁に
巻回移れるとともに、熱交換器(4)を貫通する通水路
であり、末端には給湯栓(6)が設けられている。また
、通水路(5)の上流側には流水センサ(7)が設けら
れ、熱交換器(4)の出口近くの通水路(5)には水温
センサ(8)が設けられている。(9)はバーナ(3)
にガス燃料を供給するガス供給管であり、このガス供給
管(9)には元電磁弁(10)と比例制御弁(11)と
が順次介挿されている。(12)はバーナ(3)に燃焼
用空気を供給するバーナファン、(13)はバーナ(3
)の近くに設けられた点火器、(14)は燃焼室(2)
の上部から流出する排気ガスを大気へ拡散きせる排気ト
ップである。(15)はケーシング(1)の外壁に巻回
された感熱素子、(16)は感熱素子(15)に血沈の
微を浬を供給する電源回路、(17)は感熱素子(15
)を流れるt流に応じた電圧信号を発生きせる電圧信号
発生回路、(19)はバーナ(3)での燃焼を制御する
燃焼制御装置である。
FIG. 1 shows a forced air supply water heater. In Figure 1, (1) is the casing (combustion chamber wall) that forms the combustion chamber (2) inside, (3) is the burner facing the bottom of the combustion chamber (2), and (4) is the combustion chamber ( 2) is a heat exchanger installed on the top. (5) is a water passage which is wound around the outer wall of the casing (1) and passes through the heat exchanger (4), and a hot water tap (6) is provided at the end. Further, a water flow sensor (7) is provided on the upstream side of the water passage (5), and a water temperature sensor (8) is provided on the water passage (5) near the outlet of the heat exchanger (4). (9) is a burner (3)
A solenoid valve (10) and a proportional control valve (11) are sequentially inserted into this gas supply pipe (9). (12) is a burner fan that supplies combustion air to the burner (3), and (13) is a burner fan that supplies combustion air to the burner (3).
), the igniter (14) is located near the combustion chamber (2)
This is an exhaust top that diffuses exhaust gas flowing out from the top of the engine into the atmosphere. (15) is a heat-sensitive element wound around the outer wall of the casing (1), (16) is a power supply circuit that supplies blood sediment to the heat-sensitive element (15), and (17) is a heat-sensitive element (15).
), and (19) is a combustion control device that controls combustion in the burner (3).

第2図は燃焼制御装置(19)の回路構成を示すもので
ある。第2図において、(20)はマイクロコンピュー
タ(以下、マイコンという)であり、このマイコン(2
0)の入力側には運転スイッチ(21)と、流水センサ
(7)と、水温センサ(8)と、温度設定器(22)と
、電圧信号発生回路(17)とが設けられている。また
、マイコン(20)の出力側には元を磁弁(10)と、
比例制御弁(11)と、バーナファン(12)と、点火
器(13)とが設けられている。また、マイコン(20
)にはA/D変換器(23)が内蔵されている。
FIG. 2 shows the circuit configuration of the combustion control device (19). In Figure 2, (20) is a microcomputer (hereinafter referred to as microcomputer);
An operation switch (21), a water flow sensor (7), a water temperature sensor (8), a temperature setting device (22), and a voltage signal generation circuit (17) are provided on the input side of the power supply unit 0). Also, on the output side of the microcomputer (20), there is a magnetic valve (10),
A proportional control valve (11), a burner fan (12) and an igniter (13) are provided. In addition, a microcomputer (20
) has a built-in A/D converter (23).

感熱素子(15)は第3図ないし第5図に示すように、
例えはポリエチレン、ポリプロピレン、ポリエステル、
ポリアミド等の熱溶解性プラスチックで作られた第1の
プラスチックフィルム(24)と、メツキ、或いは金属
ラミネートのエツチング処理等によって第1のプラスチ
ックフィルム(24)上に設けられた導電パターン(2
5)と、導電パターン(25〉が設けられた第1のプラ
スチックフィルム(24)上に接着で取り付けられ、導
電パターン(25)を被覆する第2のプラスチックフィ
ルム(26)とからなり、導電パターン(25)は第1
のプラスチックフィルム(24)のほぼ全面にわたって
蛇行形成されている。この感熱素子(15)は第1のプ
ラスチックフィルム(24)をケーシング(1)の外壁
と接触させた状態でケーシング(1)に巻き付けられて
いる。また、導電パターン(25〉の両端子(25A)
(25B)はリード線(27)(2B>を介して電源回
路(16)と電圧信号発生回路(17)とに接続されて
いる。
As shown in FIGS. 3 to 5, the heat-sensitive element (15) is
For example, polyethylene, polypropylene, polyester,
A first plastic film (24) made of a heat-melting plastic such as polyamide, and a conductive pattern (24) provided on the first plastic film (24) by plating or etching a metal laminate.
5) and a second plastic film (26) which is attached by adhesive on the first plastic film (24) provided with the conductive pattern (25) and covers the conductive pattern (25), (25) is the first
A meandering pattern is formed over almost the entire surface of the plastic film (24). This heat-sensitive element (15) is wrapped around the casing (1) with the first plastic film (24) in contact with the outer wall of the casing (1). In addition, both terminals (25A) of the conductive pattern (25>)
(25B) is connected to a power supply circuit (16) and a voltage signal generation circuit (17) via a lead wire (27) (2B>).

運転スイッチ(21)の投入中に給湯栓(6)を開くと
、通水路(5)に水が流れ、流水センサ(7)が流水「
有Jの信号を発する。このとき、マイコン(20)はま
ずバーナファン(12)を作動させ、バーナ(3)のブ
リパージを行った後、点火プラグ(13)を作動許せる
とともに、元電磁弁(10)及び比例制御弁(11)を
開弁させる。このため、バーナ(3)にはガス燃料が供
給きれる。そして、このガス燃料はバーナファン(12
)によって供給される燃焼用空気と混合され、混合気体
は点火器(13)によって着火きれ、燃焼する。このよ
うにして燃焼が行われると、通水路(5)を流れる水が
熱交換器(4)を流れる間に瞬時に加熱きれる。また、
燃焼中は水温センサ(8)の検出温度と温度設定器(2
2〉による設定温度とがマイコン(20)内部で比較き
れ、マイコン(20)は水温センサ(8)の検出温度が
設定温度になるように比例制御弁(11)の弁開度を調
整するため、バーナ(3)での燃焼量が給湯負荷に合わ
せて増減され、給湯栓(6)から出湯啓れる湯の温度は
設定温度の近くに維持きれる。
When the hot water tap (6) is opened while the operation switch (21) is turned on, water flows into the water passageway (5) and the water flow sensor (7) indicates that the water is flowing.
Gives a signal indicating presence. At this time, the microcomputer (20) first operates the burner fan (12), performs a pre-purging of the burner (3), and then allows the spark plug (13) to operate, as well as the original solenoid valve (10) and the proportional control valve ( 11) Open the valve. Therefore, gas fuel can be completely supplied to the burner (3). This gas fuel is then used as a burner fan (12
), and the mixed gas is ignited by the igniter (13) and combusts. When combustion is performed in this manner, the water flowing through the water passageway (5) can be instantly heated while flowing through the heat exchanger (4). Also,
During combustion, the detected temperature of the water temperature sensor (8) and the temperature setting device (2)
2) can be compared internally with the set temperature by the microcomputer (20), and the microcomputer (20) adjusts the valve opening degree of the proportional control valve (11) so that the temperature detected by the water temperature sensor (8) becomes the set temperature. The amount of combustion in the burner (3) is increased or decreased according to the hot water supply load, and the temperature of hot water discharged from the hot water tap (6) can be maintained close to the set temperature.

常時は感熱素子(15)の導電パターン(25)に微電
流が流れているため、電圧信号発生回路(17)はこの
微を流によって生しる電圧信号をマイコン(20)に供
給している。ところが、何らかの原因でケーシング(1
)が過熱きれたり、ケーシング(1)に孔が開き、燃焼
ガスが漏れた場合、感熱素子(15)の第1のプラスチ
ックフィルム(24)の何れかの部分(最も高温になる
部分)が溶断し、これに伴ってその近くの導電パターン
(25)が破断される。このとき、導電パターン(25
)の両端子(25A>(25B)間の電気抵抗が急激に
増大し、微電流が流れなくなるため、電圧信号発生回路
(17)の電圧信号が急激に小びくなる。そして、マイ
コン(20)か元t′磁弁(10)及び比例電磁弁(1
1)を強制的に閉弁させるため、バーナ(3)での燃焼
が停止され、火災等の異常な事態を回避できる。
Since a small current always flows through the conductive pattern (25) of the heat-sensitive element (15), the voltage signal generation circuit (17) supplies a voltage signal generated by this current to the microcomputer (20). . However, for some reason, the casing (1
) becomes overheated, or if a hole opens in the casing (1) and combustion gas leaks, any part (the part that becomes the hottest) of the first plastic film (24) of the heat-sensitive element (15) will melt. As a result, the conductive pattern (25) in the vicinity is broken. At this time, conductive pattern (25
) The electrical resistance between both terminals (25A>(25B) of Kamotot' solenoid valve (10) and proportional solenoid valve (1
1), combustion in the burner (3) is stopped and abnormal situations such as fire can be avoided.

本実施例によれば、感熱素子(15)が熱溶解性の第1
のプラスチックフィルム(24)と、第1のプラスチッ
クフィルム(24)の上面に設けられた導電パターン(
25)と、この導電パターン(25)を被覆する第2の
プラスチックフィルム(26)とで構成されているため
、1つの感熱素子(15)をケーシング(1)の外壁に
巻き付けておくことにより、感熱素子(15)をケーシ
ング(1)に面接触いせ、ケーシング(1)の外壁の広
範囲の部分における異常温度を検知することができ、ケ
ーシング(1)が過熱したり、ケーシング(1)の孔開
きによって燃焼ガスが漏れた場合には燃焼を停止きせる
ことかできる。
According to this embodiment, the heat-sensitive element (15) is a heat-melting first
plastic film (24) and a conductive pattern (
25) and a second plastic film (26) that covers this conductive pattern (25), so by wrapping one heat-sensitive element (15) around the outer wall of the casing (1), By placing the heat-sensitive element (15) in surface contact with the casing (1), it is possible to detect abnormal temperatures in a wide range of areas on the outer wall of the casing (1). If combustion gas leaks due to opening, combustion can be stopped.

また、感熱素子(15)を取り付は場所に合わせて任意
の形状に成形することができ、導電パターン(15)の
配線密度も自由に選択可能であるなど、使い勝手に優れ
ているはかりでなく、導電パターン(15)に流す電流
が極く僅かで良く、導電パターン(15)が第2のプラ
スチックフィルム(26)によって保護されているなど
、安全性及び信頼性にも優れている。さらにまた、1つ
の感熱素子の絶縁処理を行えば良いので、絶縁処理を簡
単に行うことができ、経済性にも富んでいる。
In addition, the heat-sensitive element (15) can be mounted in any shape depending on the location, and the wiring density of the conductive pattern (15) can be freely selected, making it an easy-to-use scale. The conductive pattern (15) is protected by the second plastic film (26), so it is safe and reliable. Furthermore, since it is only necessary to insulate one heat-sensitive element, the insulating process can be easily performed and is highly economical.

尚、上述した実施例では、給湯機を1例として説明した
が、この発明は温風暖房機等の燃焼機にも適用可能であ
る。
In the above-described embodiment, a water heater was explained as an example, but the present invention is also applicable to a combustion machine such as a hot air heater.

(ト〉発明の効果 この発明は以上のように構成きれているので、感熱素子
を燃焼室外部の適所に必要な広さだけ面接触きせること
ができ、従来のように1個又は複数の感熱素子を用いて
スポット的な異常温度検出を行うものに比べて信頼性が
高められ、燃焼室壁が過熱したり、燃焼室壁の孔開きに
よって燃焼ガスが漏れた場合には燃焼を停止きせること
かできる。しかも、漏電や外力による損傷の心配がなく
、安全性に優れ、絶縁処理も簡単にでき、経済性にも優
れたものである。
(G) Effects of the Invention Since the present invention is configured as described above, the heat-sensitive element can be brought into surface contact with the necessary area at a suitable location outside the combustion chamber, and one or more heat-sensitive elements can It is more reliable than those that detect spot abnormal temperatures using elements, and can stop combustion if the combustion chamber wall overheats or combustion gas leaks due to a hole in the combustion chamber wall. In addition, there is no fear of damage due to electrical leakage or external force, and it is highly safe, can be easily insulated, and is highly economical.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例装置の全体構成説明図、第
2図は燃焼制御装置のブロック図、第3図は感熱素子の
一部省略した平面図、第4図は第3図のA−A’断面図
、第5図は第3図のB−B’断面図である。 (2)・・・燃焼室、 (3)・・・バーナ、 (15
)・・・感熱素子、(24)・・・第1のプラスチック
フィルム、(25)・・・導電パターン、 (25A)
(25B)・・・端子、 (26)・・・第2のプラス
チックフィルム。
FIG. 1 is an explanatory diagram of the overall configuration of a device according to an embodiment of the present invention, FIG. 2 is a block diagram of a combustion control device, FIG. 3 is a partially omitted plan view of a heat-sensitive element, and FIG. 4 is a diagram similar to that of FIG. FIG. 5 is a sectional view taken along line AA' in FIG. 3, and FIG. 5 is a sectional view taken along line BB' in FIG. (2)... Combustion chamber, (3)... Burner, (15
)...thermal element, (24)...first plastic film, (25)...conductive pattern, (25A)
(25B)...Terminal, (26)...Second plastic film.

Claims (1)

【特許請求の範囲】[Claims] (1)バーナと、このバーナを臨ませた燃焼室と、この
燃焼室の外部に取り付けられた感熱素子とを備え、感熱
素子が所定温度を感知したときにバーナでの燃焼を停止
させるものにおいて、感熱素子は熱溶解性の第1のプラ
スチックフィルムと、第1のプラスチックフィルムの上
面に設けられた導電パターンと、この導電パターンを被
覆する第2のプラスチックフィルムとからなり、導電パ
ターンの両端子間の電気抵抗に応じて燃焼を停止させる
ことを特徴とする燃焼機の安全装置。
(1) A device that includes a burner, a combustion chamber facing the burner, and a heat-sensitive element attached to the outside of the combustion chamber, and stops combustion in the burner when the heat-sensitive element senses a predetermined temperature. , the heat-sensitive element is composed of a first heat-melting plastic film, a conductive pattern provided on the top surface of the first plastic film, and a second plastic film covering the conductive pattern, with both terminals of the conductive pattern A safety device for a combustion machine characterized by stopping combustion depending on the electrical resistance between the two.
JP33231090A 1990-11-28 1990-11-28 Safety device of combustion apparatus Pending JPH04198616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33231090A JPH04198616A (en) 1990-11-28 1990-11-28 Safety device of combustion apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33231090A JPH04198616A (en) 1990-11-28 1990-11-28 Safety device of combustion apparatus

Publications (1)

Publication Number Publication Date
JPH04198616A true JPH04198616A (en) 1992-07-20

Family

ID=18253535

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33231090A Pending JPH04198616A (en) 1990-11-28 1990-11-28 Safety device of combustion apparatus

Country Status (1)

Country Link
JP (1) JPH04198616A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000018567A (en) * 1998-06-23 2000-01-18 Paloma Ind Ltd Overheat preventor for combustor
JP2018071852A (en) * 2016-10-27 2018-05-10 株式会社ノーリツ Burning appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000018567A (en) * 1998-06-23 2000-01-18 Paloma Ind Ltd Overheat preventor for combustor
JP2018071852A (en) * 2016-10-27 2018-05-10 株式会社ノーリツ Burning appliance

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