JPS599011B2 - gas water heater - Google Patents

Description

【発明の詳細な説明】 本発明はガス湯沸器、特にその点火装置の改良構造に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas water heater, and more particularly to an improved structure of its ignition device.

この種の湯沸器は、主バーナを直接点火するものとその
主バーナを常時燃焼している点火バーナで点火するもの
とに別けられる。This type of water heater is divided into those that directly ignite the main burner and those that ignite the main burner with an ignition burner that is constantly burning.

前者の欠点は、その点火が失敗に終ると大量の生ガスが
放出されるので再点火するのをしばらく待たなければ爆
発点火する危険があることであり、後者の欠点は、常時
点火バーナを燃焼させるという無駄があり、又小さな炎
であるために吹き消えることがあるのでその為の安全装
置を設ける必要があることである。The disadvantage of the former is that if the ignition fails, a large amount of raw gas is released and there is a risk of explosive ignition if you do not wait for a while to re-ignite. There is a waste of letting the flames burn, and since the flames are small, they may blow out, so it is necessary to provide a safety device for this purpose.

この問題に対処すべく、給水スイッチの作動を検知して
点火バーナヘガス供給して点火を行いその点火を検知し
てメインバーナへのガス供給弁を開き、燃焼させるよう
にしたガス湯沸器が特開昭５０−１１５３４２号にて提
案されている。To deal with this problem, a special gas water heater has been developed that detects the operation of the water supply switch, supplies gas to the ignition burner, ignites it, detects the ignition, opens the gas supply valve to the main burner, and starts combustion. This was proposed in 1972-115342.

しかしながら、斯る従来例においてはメインバーナへの
ガス供給弁が電磁弁となっている為に、このガス供給弁
に緩点火動作を行わせようとすると複数の大型の電磁弁
を必要とし、コストアップとなると共に制御回路が複雑
となる欠点があった。However, in such conventional examples, the gas supply valve to the main burner is a solenoid valve, so if you try to make this gas supply valve perform a slow ignition operation, you will need multiple large solenoid valves, which increases the cost. However, the disadvantage was that the control circuit was complicated.

本発明は水圧応動装置のダイヤフラムで分けられた高圧
室と低圧室間の差圧が発生しない状態に少くとも低圧室
への流路を調節して常時保持する電磁弁を設け、この電
磁弁を上記副バーナの点火確認信号の到来により上記画
室間の差圧が発生する状態に作動させると共に、上記低
圧室への流路に緩点火装置を設けることにより、上記欠
点を解消したもので、以下にその実施例を図について説
明する。The present invention provides a solenoid valve that adjusts and always maintains at least the flow path to the low pressure chamber in a state where no differential pressure occurs between the high pressure chamber and the low pressure chamber, which are separated by a diaphragm of the hydraulic response device. The above disadvantages are solved by operating the sub burner in a state where a differential pressure is generated between the compartments upon arrival of the ignition confirmation signal, and by providing a slow ignition device in the flow path to the low pressure chamber. The embodiment will be explained with reference to the drawings.

１は給水口２、ダイヤフラム型の水ガバナー３、水量調
節弁４、熱交換器５、給湯口６の順に連る水通路で、水
量調節弁４の下流にベンチュリー７を形成し、このベン
チュリー７をダイヤフラム型の水圧応動装置８の低圧室
９に低圧流路１０によって連通させると共に、その高圧
室１１に水量調節弁４の上流を高圧流路１２によって連
通させている。Reference numeral 1 denotes a water passage that connects in this order a water supply port 2, a diaphragm-type water governor 3, a water flow control valve 4, a heat exchanger 5, and a hot water supply port 6. A venturi 7 is formed downstream of the water flow control valve 4, and this venturi 7 is communicated with a low pressure chamber 9 of a diaphragm type hydraulic response device 8 through a low pressure passage 10, and an upstream side of the water flow control valve 4 is communicated with the high pressure chamber 11 through a high pressure passage 12.

１３は主バーナ、１４はその点火を行なう主バーナより
も小容量の副バーナで、夫々のバーナ１３，１４は熱交
換器５の下方に加熱関係に配設されている。Reference numeral 13 indicates a main burner, and 14 indicates an auxiliary burner having a smaller capacity than the main burner for ignition.

１５はガス入口１６、第１電磁弁１７、ダイヤフラム型
のガスガバナー１８を順に連ねたガス通路で、ガバナー
１８の下流に副バーナ１４に至る枝路１９と主バーナ１
３に至る大径の主通路２０及び小径の副通路２１とを連
通させている。15 is a gas passage in which a gas inlet 16, a first electromagnetic valve 17, and a diaphragm-type gas governor 18 are successively connected;
A large-diameter main passage 20 and a small-diameter sub-passage 21 leading to No. 3 are communicated with each other.

２２は水圧応動装置８のダイヤフラム２３に固着された
スピンドルで、その先端には上記主、副通路２０．２１
を同時に開閉する第１ガス弁２４と主通路２０のみ開閉
する第２ガス弁２５とを設けており、この第１、第２ガ
ス弁２４ ，２５を給水圧を受けたダイヤフラム２３の
移動により開放させるが、第２ガス弁２５については一
定時間だけ遅れて開放させる。22 is a spindle fixed to the diaphragm 23 of the hydraulic response device 8, and the above-mentioned main and sub passages 20 and 21 are connected to the tip of the spindle.
A first gas valve 24 that opens and closes the main passage 20 at the same time and a second gas valve 25 that opens and closes only the main passage 20 are provided. However, the second gas valve 25 is opened after a certain period of time.

２６は上記高圧流路１２と低圧流路１０とを連通させる
連通路で、第２電磁弁２７によって開閉するようにして
ある。Reference numeral 26 denotes a communication passage that communicates the high pressure passage 12 and the low pressure passage 10, and is opened and closed by a second electromagnetic valve 27.

尚、２８は低圧流路１０とベンチュリー７下流とを連通
ずる排水路で、第２電磁弁２７によって開閉され、又路
内には手動の排水栓２９を設けている。Reference numeral 28 denotes a drainage channel that communicates the low pressure channel 10 with the downstream side of the venturi 7, which is opened and closed by a second electromagnetic valve 27, and a manual drain plug 29 is provided in the channel.

３０は副バーナ１４を点火させる点火プラグ、３１は副
バーナ１４の点火燃焼炎を検知する検知電極、３２は水
通路１内に給水された時にその給水圧力によって作動す
るダイヤフラム型の給水スイッチ、３３は給水スイッチ
３２や検知電極３１から夫々信号を受け、第１電磁弁１
７及び第２電磁弁２７を作動させると共に、適宜点火プ
ラグ３０に高電圧を印加せしめる制御装置である。30 is a spark plug that ignites the auxiliary burner 14; 31 is a detection electrode that detects the ignited combustion flame of the auxiliary burner 14; 32 is a diaphragm-type water supply switch that is activated by the water supply pressure when water is supplied into the water passage 1; 33; receives signals from the water supply switch 32 and the detection electrode 31, respectively, and operates the first solenoid valve 1.
7 and the second electromagnetic valve 27, and applies a high voltage to the spark plug 30 as appropriate.

３４は低圧室９に近い低圧流路１０内に設けられた小球
３５とこ、の小球３５をバイパスするバイパス路３６と
から成る緩点火装置である。34 is a slow ignition device consisting of a small ball 35 provided in the low pressure flow path 10 near the low pressure chamber 9 and a bypass path 36 that bypasses the small ball 35.

尚、３７は水ガ冫くナー３の低圧室と低圧流路１０とを
連通ずる通路である。Note that 37 is a passage that communicates the low pressure chamber of the water tanker 3 with the low pressure passage 10.

次に、本発明による湯沸器の動作について説明するが、
給水開始以前には第１電磁弁１７は閉成し、第２電磁弁
２７は開牧し、第１、第２ガス弁２４，２５は閉成して
いる。Next, the operation of the water heater according to the present invention will be explained.
Before water supply starts, the first solenoid valve 17 is closed, the second solenoid valve 27 is opened, and the first and second gas valves 24 and 25 are closed.

まず、給水口２から水連路１内に給水が開始されると、
その水の圧力が水ガバナー３で調整されると共に水量が
調節器４で調節され、ベンチュリー７を介して熱交換器
５に入いり、給湯口６から出ていく。First, when water starts to be supplied from the water supply port 2 into the water passage 1,
The pressure of the water is regulated by a water governor 3 and the amount of water is regulated by a regulator 4, which enters a heat exchanger 5 via a venturi 7 and exits from a hot water supply port 6.

この間、水圧応動装置８は第２電磁弁２７が開放して連
通路２６を開放しているのでダイヤフラム２３の両面が
同一圧力を受けていて作動しない。During this time, the second electromagnetic valve 27 is opened to open the communication path 26, so both sides of the diaphragm 23 are receiving the same pressure and the hydraulic response device 8 does not operate.

而して、一方では水通路１への給水により給水スイッチ
３２が作動するので制御装置３３は第１電磁弁１７を開
放させて枝路１９から副バーナ１４にガス供給せしめる
と共に、点火プラグ３０に一定時間だけ高電圧を印加せ
しめる。On the other hand, since the water supply switch 32 is activated by the water supply to the water passage 1, the control device 33 opens the first solenoid valve 17 to supply gas from the branch passage 19 to the auxiliary burner 14, and also causes the spark plug 30 to be supplied with gas. A high voltage is applied for a certain period of time.

かくして、副バーナ１４が点火燃焼すると、その炎を検
知電極３１が検知するので制御装置３３は第２電磁弁２
７によって連通路２６を閉成させる。In this way, when the auxiliary burner 14 ignites and burns, the detection electrode 31 detects the flame, so the control device 33 controls the second solenoid valve 2.
7 closes the communication path 26.

連通路２６が閉じると、高圧室１１と低圧室９との間に
差圧が生じるので水圧応動装置８は緩点火装置３４によ
って徐々にスピンドル２２を移動させる。When the communication passage 26 is closed, a pressure difference is generated between the high pressure chamber 11 and the low pressure chamber 9, so that the hydraulic response device 8 gradually moves the spindle 22 by the slow ignition device 34.

従って、まず第１ガス弁２４が開いて主バーナ１３に副
通路２１から小量のガスを供給し、且つ副バーナ１４で
点火燃焼させ、その後第２ガス弁２５が開いて主バーナ
１３に主、副の両通路２０，２１から大量のガスを供給
して所定の燃焼を行なわせる。Therefore, the first gas valve 24 is first opened to supply a small amount of gas to the main burner 13 from the auxiliary passage 21 and ignited and burned in the auxiliary burner 14, and then the second gas valve 25 is opened to supply the main burner 13 with a small amount of gas. , a large amount of gas is supplied from both auxiliary passages 20, 21 to carry out predetermined combustion.

尚、供給ガスはガスガバナー１８によって所定の圧力に
調整されている。Note that the supplied gas is adjusted to a predetermined pressure by a gas governor 18.

そして、燃交換器５で加熱された水は湯となって給湯口
６から供給され続けるが、所望の湯量が得られたら給水
を停止せしめる。The water heated by the fuel exchanger 5 becomes hot water and continues to be supplied from the hot water supply port 6, but when the desired amount of hot water is obtained, the water supply is stopped.

従って、給水スイッチ３２が作動停止するので制御装置
３３は第１電磁弁１７を閉成復帰させると共に第２電磁
弁２７を元の開放状態に戻す。Therefore, since the water supply switch 32 is deactivated, the control device 33 returns the first solenoid valve 17 to its closed state and returns the second solenoid valve 27 to its original open state.

よって、主バーナ１３及び副バーナ１４へのガス供給が
停止して各バーナ１３，１４は消火し、又連通路２６が
開いて水圧応動装置８は作動停止状態に保持される。Therefore, the gas supply to the main burner 13 and the auxiliary burner 14 is stopped, each burner 13, 14 is extinguished, and the communication passage 26 is opened, so that the hydraulic response device 8 is maintained in an inoperative state.

この時、排水栓２９を緩めて開くと、高圧室１１及び低
圧室９内の残留水が第２電磁弁２７を通って排水路２８
内に導出され且つ排水栓２９から出ていく。At this time, when the drain plug 29 is loosened and opened, the residual water in the high pressure chamber 11 and the low pressure chamber 9 passes through the second electromagnetic valve 27 and enters the drain channel 28.
The water is led out into the interior and exits from the drain plug 29.

尚、上記点火プラグ３０から一定時間だけ高電圧が印加
され、その間に検知電極３１によって検知できない時に
は制御装置３３は第１電磁弁１７を直ちに閉成復帰させ
る。Incidentally, when the high voltage is applied from the spark plug 30 for a certain period of time and the detection electrode 31 cannot detect it during that period, the control device 33 immediately closes and returns the first electromagnetic valve 17.

そして、その後の一定時間は給水スイッチ３２が給水に
よって作動されても制御装置３３は動作せず、副バーナ
１４から出た生ガスが完全に器外に排出されるのを待つ
。Thereafter, for a certain period of time, even if the water supply switch 32 is activated by water supply, the control device 33 does not operate, and waits until the raw gas discharged from the sub-burner 14 is completely discharged outside the vessel.

ここで、第２図で示す他の実施例では連通路２６を無く
し且つ低圧流路１０中に第２電磁弁２７を装着している
。Here, in another embodiment shown in FIG. 2, the communication passage 26 is eliminated and a second electromagnetic valve 27 is installed in the low pressure flow passage 10.

即ち、給水以前には第２電磁弁２７を閉成して低圧室９
内を密閉しておき、給水圧が高圧室１１に印加されても
ダイヤフラム２３が移動しないようにすると共に、炎を
検知電極３１が検知することによる点火確認信号の到来
により第２電磁弁を開くようにする。That is, before water is supplied, the second solenoid valve 27 is closed and the low pressure chamber 9 is closed.
The interior is sealed to prevent the diaphragm 23 from moving even when water supply pressure is applied to the high pressure chamber 11, and the second electromagnetic valve is opened when an ignition confirmation signal arrives due to detection of flame by the detection electrode 31. do it like this.

尚、低圧室９を大気に小孔等で連通させる型式の水圧応
動装置８ではその小孔等を第２図の他の実施例のように
第２電磁弁２７で開閉させれば良い。In the hydraulic response device 8 of the type in which the low pressure chamber 9 is communicated with the atmosphere through a small hole or the like, the small hole or the like may be opened and closed by a second electromagnetic valve 27 as in the other embodiment shown in FIG.

このように本発明は水通路中の熱交換器を加熱する主バ
ーナとこのバーナを点火し且つ上記水通路への給水の度
に点火される副バーナと上記主バーナへのガス供給弁を
上記水通路中の圧力を高圧室で受けたダイヤフラムの移
動によって作動する水圧応動装置とから成り、上記水圧
応動装置のダイヤフラムで分けられた高圧室と低圧室間
の差圧が発生しない状態に少くとも低圧室への流路を調
節して常時保持する電磁弁を設け、この電磁弁を上記副
バーナの点火確認信号の到来により上記画室間の差圧が
発生する状態に作動させると共に上記低圧室への流路に
緩点火装置を設けてなるものであり、副バーナを給水の
度に点火し副バーナの点火確認信号の到来により低圧室
への流路の電磁弁を上記画室間の差圧が発生する状態に
作動させ緩点火装置を作動させて主バーナを緩点火させ
る。In this way, the present invention includes a main burner that heats a heat exchanger in a water passage, a sub-burner that ignites this burner and is ignited every time water is supplied to the water passage, and a gas supply valve to the main burner as described above. and a hydraulic response device that is activated by the movement of a diaphragm that receives the pressure in the water passage in a high pressure chamber, and at least maintains a state in which no differential pressure occurs between the high pressure chamber and the low pressure chamber, which are separated by the diaphragm of the hydraulic response device. A solenoid valve is provided to adjust and maintain the flow path to the low pressure chamber at all times, and this solenoid valve is operated to a state where a pressure difference between the compartments is generated upon arrival of the ignition confirmation signal of the auxiliary burner, and the flow path to the low pressure chamber is operated. A slow ignition device is installed in the flow path, and the sub-burner is ignited every time water is supplied, and upon arrival of the sub-burner ignition confirmation signal, the solenoid valve in the flow path to the low pressure chamber is activated to reduce the pressure difference between the compartments. Activate the slow ignition device to slowly ignite the main burner.

従って副バーナの常時燃焼の無駄がなく、又、給水動作
と副バーナの点火動作の両方が行われて初めて主バーナ
ヘガス供給するので、主バーナが徒らに点火失敗を繰返
して生ガスを放出するという危険や爆発点火が無くなる
。Therefore, there is no waste in constantly burning the auxiliary burner, and since gas is supplied to the main burner only after both the water supply operation and the ignition operation of the auxiliary burner are performed, the main burner repeatedly fails to ignite and releases raw gas. This eliminates the risk of explosion and ignition.

上記の如く構成される本発明に依れば、緩点火動作、爆
発点火の解消及び常時燃焼の無駄の防止を、水圧応動装
置に小型の電磁弁を付加することで行えるので、従来の
電磁弁によって同じ動作を行うものと比較してコストダ
ウンを図りうると共に１個の電磁弁の制御で良いので制
御回路構成を簡単化できる等効果が太きい。According to the present invention configured as described above, it is possible to eliminate slow ignition operation, explosive ignition, and prevent wasteful constant combustion by adding a small solenoid valve to the hydraulic response device, so that the conventional solenoid valve This has significant effects such as cost reduction compared to a device that performs the same operation, and also simplifies the control circuit configuration since only one solenoid valve is required to control it.

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

第１図は本発明によるガス湯沸器の断面図、第２図は要
部の他の実施例の断面図である。 ８・・・・・・水圧応動装置、９・・・・・・低圧室、
１０・・・・・・低圧流路、１１・・・・・・高圧室、
１３・・・・・・主バーナ、１４・・・・・・副バーナ
、２４，２５・・・・・・ガス弁、２７・・・・・・第
２電磁弁。FIG. 1 is a sectional view of a gas water heater according to the present invention, and FIG. 2 is a sectional view of another embodiment of the main part. 8...Hydraulic response device, 9...Low pressure chamber,
10...Low pressure flow path, 11...High pressure chamber,
13...Main burner, 14...Sub burner, 24, 25...Gas valve, 27...Second solenoid valve.

Claims (1)

【特許請求の範囲】 １ 水通路中の熱交換器を加熱する主バーナとこのバー
ナを点火し且つ上記水通路への給水の度に点火される副
バーナと上記主バーナへのガス供給弁を上記水通路中の
圧力を高圧室で受けたダイヤフラムの移動によって作動
する水圧応動装置とから成り、上記水圧応動装置のダイ
ヤフラムで分けられた高圧室と低圧室間の差圧が発生し
ない状態に少くとも低圧室への流路を調節して常時保持
する電磁弁を設け、この電磁弁を上記副バーナの点火確
認信号の到来により上記画室間の差圧が発生する状態に
作動させると共に、上記低圧室への流路に緩点火装置を
設けてなるガス湯沸器。 ２ 上記電磁弁は水圧応動装置の高圧室と低圧室を連動
する水の連通路を常時開放する電磁弁であることを特徴
とした特許請求の範囲第１項記載のガス湯沸器。 ３ 上記電磁弁は水圧応動装置の水通路に連通ずる低圧
室への流路を給水以前に密閉し点火確認信号の到来によ
り開く電磁弁であることを特徴とした特許請求の範囲第
１項記載のガス湯沸器。[Claims] 1. A main burner that heats a heat exchanger in the water passage, a sub-burner that ignites this burner and is ignited every time water is supplied to the water passage, and a gas supply valve to the main burner. It consists of a hydraulic response device that is activated by the movement of a diaphragm that receives the pressure in the water passage in a high pressure chamber, and the system is designed to minimize the pressure difference between the high pressure chamber and low pressure chamber, which are separated by the diaphragm of the hydraulic response device. A solenoid valve is provided which adjusts the flow path to the low pressure chamber and maintains it at all times, and when the auxiliary burner ignition confirmation signal arrives, the solenoid valve is operated to generate a differential pressure between the compartments, and the low pressure A gas water heater equipped with a slow ignition device in the flow path to the chamber. 2. The gas water heater according to claim 1, wherein the solenoid valve is a solenoid valve that always opens a water communication path that connects the high pressure chamber and the low pressure chamber of the hydraulic response device. 3. Claim 1, characterized in that the solenoid valve is a solenoid valve that seals a flow path to a low pressure chamber that communicates with a water path of a hydraulic response device before water is supplied, and opens upon arrival of an ignition confirmation signal. gas water heater.