JPH0319443B2 - - Google Patents
Info
- Publication number
- JPH0319443B2 JPH0319443B2 JP58027927A JP2792783A JPH0319443B2 JP H0319443 B2 JPH0319443 B2 JP H0319443B2 JP 58027927 A JP58027927 A JP 58027927A JP 2792783 A JP2792783 A JP 2792783A JP H0319443 B2 JPH0319443 B2 JP H0319443B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- proportional control
- control valve
- signal
- closing
- 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 claims description 24
- 238000001514 detection method Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
- F23N1/082—Regulating fuel supply conjointly with another medium, e.g. boiler water using electronic means
-
- 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
-
- 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
- F23N2235/20—Membrane valves
-
- 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
- F23N2235/24—Valve details
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は通電量に応じてバーナーへのガス量を
制御し、被加熱物の温度をコントロールする比例
制御弁を有するガス燃焼制御装置に関するもので
ある。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a gas combustion control device that has a proportional control valve that controls the amount of gas to a burner according to the amount of electricity supplied and controls the temperature of a heated object. .
従来例の構成とその問題点
従来のこの種ガス燃焼制御装置を第１図に示
す。第１図において１は元コツク、２は元電磁弁
であり、その下流からパイロツト通路３が分岐さ
れ、元電磁弁２を開弁することによりパイロツト
バーナー４が着火する。５は閉止弁であり、その
下流には比例制御弁６を有している。比例制御弁
６は、弁座７と弁体８、弁体８と共動するダイヤ
フラム９及び弁閉方向に付勢する閉止用弾性体１
０から構成される周知のガバナ部Ａと、コイル１
１とヨーク１２及びコイル１１の軸線上に両端を
板バネ１３によつて無摺動支持されたプランジヤ
１４とから構成される電磁駆動部Ｂとからなり、
コイル１１への通電量に応じてガス流量を制御す
る。Structure of a conventional example and its problems A conventional gas combustion control device of this type is shown in FIG. In FIG. 1, reference numeral 1 designates an original solenoid valve, and 2 represents an original solenoid valve, from which a pilot passage 3 is branched downstream, and when the original solenoid valve 2 is opened, a pilot burner 4 is ignited. 5 is a shutoff valve, and a proportional control valve 6 is provided downstream thereof. The proportional control valve 6 includes a valve seat 7, a valve body 8, a diaphragm 9 that operates together with the valve body 8, and a closing elastic body 1 that biases the valve in the valve closing direction.
A well-known governor section A consisting of 0 and a coil 1
1 and a plunger 14 whose both ends are non-slidingly supported on the axis of a yoke 12 and a coil 11 by a leaf spring 13,
The gas flow rate is controlled according to the amount of electricity applied to the coil 11.
１５はバーナー、１６は熱交換器、１７は熱交
換器１６の下流側に設けられ、湯温を検出する感
熱素子であり、その信号は制御器１８で設定値と
比較され、その偏差信号によつて比例制御弁６へ
の通電量が決定される。１９は水栓、２０はシヤ
ワーヘツドである。つまり、湯温を検出し、その
信号に応じて燃焼量が制御され、所望温度の湯が
得られるわけである。 15 is a burner, 16 is a heat exchanger, and 17 is a heat-sensitive element that is installed downstream of the heat exchanger 16 and detects the water temperature.The signal is compared with a set value in the controller 18, and the deviation signal is Therefore, the amount of current applied to the proportional control valve 6 is determined. 19 is a faucet, and 20 is a shower head. In other words, the temperature of the hot water is detected and the amount of combustion is controlled according to the signal to obtain hot water at the desired temperature.
この種のガス燃焼制御装置に用いられる比例制
御弁６は、バーナー側からきまる最小燃焼量から
最大燃焼までの広範囲にわたつて精度よくガス流
量を制御する必要があり、またバーナー１５への
ガス流量を完全に遮断する閉止機能が必要とされ
る。前者の場合、特に空燃比制御の場合に重要で
あり、後者は比例制御弁６の通電量を零にしても
ガスが洩れ、前記最小燃焼量以下となつて、バツ
クフアイヤ等の問題が発生するためである。前者
の課題を解決するためには、電磁駆動部Ｂで発生
する電磁力が、摺動摩擦等の外乱を受けることな
く、忠実に弁体８に作用するように配慮する必要
があり、そのため、弁座７と弁体８の当接部はロ
ツクされないような形状、材質を選定する必要が
ある。ここでいうロツクとは、弁座７と弁体８の
粘着、あるいは、弁体８が閉止用弾性体１０の力
を受けて弁座７側に嵌着され、スムーズに開弁で
きない状態をいう。一方、後者の課題を解決する
ためには、弁体８と弁座７との当接部に弾性部材
を設け、且つ、閉止用弾性体１０の閉止力を増加
させる方法が一般的である。しかしながらこの場
合、弾性部材を介して弁座７に弁体８が保持され
るため、粘着が発生しやすく、弁体８が弁座７に
ロツクされ、コイル１１へ通電しても開弁せず、
特に小流量域での制御特性が悪化する。第２図は
その様子を示すものであり、所定のコイル電流I1
（例えば爆発着火を防止するための緩点火電流）
を通電しても所定のガス流量Q1は得られず、ロ
ツクが解除される不特定な通電量IXにおいて急激
に開弁し、例えば爆発着火が発生する。 The proportional control valve 6 used in this type of gas combustion control device needs to accurately control the gas flow rate over a wide range from the minimum combustion amount to the maximum combustion amount determined from the burner side, and also controls the gas flow rate to the burner 15. A closing function that completely shuts off is required. The former case is particularly important in air-fuel ratio control, and the latter is because even if the amount of current flowing through the proportional control valve 6 is reduced to zero, gas will leak and the combustion amount will be below the minimum combustion amount, causing problems such as backup fire. It is. In order to solve the former problem, it is necessary to make sure that the electromagnetic force generated by the electromagnetic drive unit B acts faithfully on the valve body 8 without being subjected to disturbances such as sliding friction. It is necessary to select a shape and material for the contact portion between the seat 7 and the valve body 8 so that they will not be locked. Lock here refers to a state in which the valve seat 7 and the valve body 8 are stuck together, or the valve body 8 is stuck to the valve seat 7 side under the force of the closing elastic body 10, making it impossible to open the valve smoothly. . On the other hand, in order to solve the latter problem, a common method is to provide an elastic member at the contact portion between the valve body 8 and the valve seat 7, and to increase the closing force of the closing elastic body 10. However, in this case, since the valve body 8 is held on the valve seat 7 via the elastic member, sticking tends to occur, and the valve body 8 is locked on the valve seat 7 and does not open even when the coil 11 is energized. ,
In particular, control characteristics deteriorate in the small flow rate range. Figure 2 shows this situation, and shows the predetermined coil current I 1
(e.g. slow ignition current to prevent explosive ignition)
Even when electricity is applied, a predetermined gas flow rate Q1 cannot be obtained, and the valve suddenly opens at an unspecified amount of electricity IX that releases the lock, and, for example, an explosion and ignition occurs.
また長期間にわたつて機器を使用しない場合、
粘着強度は更に大きくなり、動作不能となる場合
がある。 Also, if the device is not used for a long period of time,
The adhesive strength may become even greater and may become inoperable.
つまり、前者の課題と後者の課題を同時に解決
することができないため、従来においては比例制
御弁６の上流側に専用の閉止弁５を設けることを
余儀なくされており、ガス燃焼制御装置のコス
ト、スペースアツプ要因となつていた。 In other words, since it is not possible to solve the former problem and the latter problem at the same time, conventionally it has been necessary to provide a dedicated shutoff valve 5 on the upstream side of the proportional control valve 6, which reduces the cost of the gas combustion control device. This was a factor in the space increase.
発明の目的
本発明は、上記従来の問題点を解決するもので
あり、比例制御弁の制御性能と閉止機能の両方を
満足し、もつて閉止弁を不要とすることにより、
ガス燃焼制御装置の低コスト化、コンパクト化を
実現するを目的とする。Purpose of the Invention The present invention solves the above conventional problems, and satisfies both the control performance and the closing function of a proportional control valve, thereby eliminating the need for a closing valve.
The aim is to reduce the cost and make the gas combustion control device more compact.
発明の構成
この目的を達成するため本発明は、弁体と弁座
の少なくとも一方に弾性部材を有し、且つ前記弁
体を閉弁方向に負勢する閉止用弾性体を設けた比
例制御弁と、負荷の温度を検出する感温素子と、
ガスバーナーを設けるとともに、前記ガスバーナ
ーの着火時に、瞬間的に前記比例制御弁の全開信
号よりも大きな駆動信号によつてこの比例制御弁
を駆動し、前記弁体と弁座の粘着ないし嵌着によ
るロツクを解除するロツク解除回路と、ロツク解
除動作後に緩点火信号を比例制御弁に供給し、そ
の後前記感温素子の信号により比例制御弁を制御
する制御器とから構成したものである。Structure of the Invention To achieve this object, the present invention provides a proportional control valve that has an elastic member on at least one of a valve body and a valve seat, and is provided with a closing elastic body that biases the valve body in a valve closing direction. and a temperature sensing element that detects the temperature of the load.
A gas burner is provided, and when the gas burner is ignited, the proportional control valve is instantaneously driven by a drive signal larger than the full-open signal of the proportional control valve, and the valve body and the valve seat are prevented from sticking or fitting together. and a controller that supplies a slow ignition signal to the proportional control valve after the lock release operation and then controls the proportional control valve using the signal from the temperature sensing element.
この構成により、弁体は弾性部材を介して弁座
に押しつけられるため完全にガスは遮断され、ま
たガスバーナーの着火時、すなわち比例制御弁の
開弁時、弁体と弁座がロツクされた状態において
も、ロツク解除回路の動作により、瞬間的に比例
制御弁のロツクを解除する力が加わり、その後緩
点火を行つた後通常の比例制御動作に入る。した
がつて、比例制御弁は閉止機能と、小流量から大
流量までの広範囲にわたる安定したガス量制御の
両方を満足する。 With this configuration, the valve body is pressed against the valve seat via an elastic member, so gas is completely shut off, and when the gas burner is ignited, that is, when the proportional control valve is opened, the valve body and valve seat are locked. Even in this state, the operation of the lock release circuit momentarily applies a force to release the lock of the proportional control valve, and after that, after performing slow ignition, normal proportional control operation begins. Therefore, the proportional control valve satisfies both the closing function and stable gas amount control over a wide range from small flow rates to large flow rates.
実施例の説明
以下、図面第３図〜第４図にもとづき本発明の
一実施例について詳細に説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 4 of the drawings.
第３図において、２は元電磁弁であり、その下
流には比例制御弁６ａとパイロツト通路３が分岐
して設けられている。比例制御弁６ａの弁体８の
弁座７との当接部には、閉止用の弾性部材８ａが
設けられ、閉弁用弾性体１０ａの作用により弁体
８は弁座７へ弾性部材８ａを介して弾力的に押付
けられ、完全にガス流路を遮断している。２１
は、ガスバーナー１５の着火時に瞬間的に比例制
御弁６ａのコイル１１に弁座７と弁体８のロツク
を解除するだけで電磁力を弁体８に作用させるの
に必要な電流を感温素子１７の信号に関係なく供
給するロツク解除回路であり、制御器１８からコ
イル１１へ供給される電流の零点近傍での増減の
方向を検出するスロープ検出回路２２と、スロー
プ検出回路２２の検出信号が増加方向にある時の
みコイル１１へ瞬間的にロツク解除入力を行うパ
ルス入力回路２３とから構成されている。つま
り、ガスバーナー１５の着火時のみパルス入力が
コイル１１へ供給される。 In FIG. 3, 2 is a solenoid valve, and a proportional control valve 6a and a pilot passage 3 are branched downstream from the solenoid valve 2. A closing elastic member 8a is provided at the contact portion of the valve body 8 of the proportional control valve 6a with the valve seat 7, and the valve body 8 is moved toward the valve seat 7 by the action of the valve closing elastic body 10a. is pressed elastically through the gas flow path, completely blocking the gas flow path. 21
When the gas burner 15 is ignited, the electric current required to apply electromagnetic force to the valve body 8 is generated by simply releasing the lock between the valve seat 7 and the valve body 8 in the coil 11 of the proportional control valve 6a. A slope detection circuit 22 is a lock release circuit that supplies the current regardless of the signal of the element 17, and detects the direction of increase or decrease near the zero point of the current supplied from the controller 18 to the coil 11, and the detection signal of the slope detection circuit 22. The pulse input circuit 23 provides an instantaneous lock release input to the coil 11 only when the value is in the increasing direction. That is, pulse input is supplied to the coil 11 only when the gas burner 15 is ignited.
なお前記弁座７と弁体８のロツクは弁座７と弾
性部材８ａの接触面積、形状、材質、閉止用弾性
体１０ａの動作力のあるいは温度、湿度等の放置
環境、放置時間などによつて決まるが、それらの
条件を考慮してパルス入力信号、すなわち前記ロ
ツクを解除する駆動力が決定される。本実施例で
はこのパルス入力信号は後述のように比例制御弁
の全開信号よりも大きい値に設定している。これ
は比例制御弁の全開信号以下の駆動力では、たと
えば１ケ月あるいは半年以上燃焼機器を動作させ
ずに放置した後に使用した場合、確実に弁ロツク
を解除できない場合が発生するためである。その
他の構成は第１図従来例と同じであり、同一番号
を符して説明を省略する。 The locking of the valve seat 7 and the valve body 8 depends on the contact area, shape, and material of the valve seat 7 and the elastic member 8a, the operating force of the closing elastic body 10a, the environment such as temperature and humidity, and the length of time the valve is left. However, the pulse input signal, ie, the driving force for releasing the lock, is determined in consideration of these conditions. In this embodiment, this pulse input signal is set to a value larger than the full open signal of the proportional control valve, as will be described later. This is because if the driving force is less than the full open signal of the proportional control valve, it may not be possible to reliably release the valve lock, for example, if the combustion equipment is used after being left inactive for one month or half a year or more. The rest of the structure is the same as the conventional example shown in FIG. 1, and the same reference numerals are used to omit the explanation.
以上の構成において次に動作を説明する。 Next, the operation of the above configuration will be explained.
元コツク１を開放し、元電磁弁２をONとする
と、ガスはパイロツト通路３を通りパイロツトバ
ーナー４から噴出し、点火要素（図示せず）の動
作により着火する。一方ガスは比例制御弁６ａの
一次側へも流入し、ダイヤフラム９と弁体８にそ
の供給圧が作用するが、有効受圧面積を等しくし
ているため弁体８は変位しない。また閉止用弾性
体１０ａにより弁体８は弾性部材８ａを介して弁
座７へ弾力的に密着して押し付けられるため、弁
座７の下流側へのガス洩れは全くない。次に熱要
求があると制御器１８は比例制御弁６ａのコイル
１１に通電を開始する。この時スロープ検出回路
２２は通電信号が増加方向であることを検出し、
したがつてパルス入力回路２３が動作してコイル
１１へパルス入力される。パルス入力によりプラ
ンジヤ１４は瞬間的に大きな力を受けて下方に変
位し、弁座７と弁体８は離反しロツクが解除され
る。その後、制御器１８はコイル１１に緩点火の
ための電流値を供給し、その値に対応したガスが
ガスバーナー１５へ流入し、パイロツトバーナー
４の炎を受けて緩点火がなされる。次に水栓１９
を開くと水は熱交換器１６で熱交換され湯となつ
てシヤワーヘツドより噴出される。湯温は感温素
子１７により検出され、その検出信号は湯温設定
器（図示せず）の信号と比較されて偏差信号に応
じて、コイル１１への電流値が決定される。つま
り設定湯温となるようコイル１１の電流が制御さ
れ燃焼量が最小燃焼量から最大燃焼量までの範囲
で制御される。この様子を第４図の制御特性にも
とづきさらに詳しく説明する。第４図において横
軸はコイル１１へ供給される電流値、縦軸は比例
制御弁６ａの制御ガス流量を示す。熱要求がある
と制御器１８はコイル１１へ通電を開始する。こ
の時の電流値の零点付近（Is）でスロープ検出回
路２２は電流が増加方向であることを検出し、パ
ルス入力回路２３をONする。パルス入力回路２
３は瞬間的に比例制御弁６ａの全開電流Inよりも
大きいパルス電流Irをコイル１１に供給し、その
結果、弁体８は圧入保持力に抗して下方へ変位し
ロツク解除される。この時、弁座７の下流側へガ
スが流入するが、瞬間的なものであり、比例制御
弁６ａからガスバーナー１５に至る配管部のエア
ーを抜く作用、言いかえるとプリパージ効果が得
られる。その直後にコイル電流は緩点火電流Ipま
で制御器１８によつて制限されガス流量はQpと
なり、前記プリパージ効果によつてすみやかな緩
点火がなされる。緩点火後は感温素子１７の信号
に応じて制御電流はIn〜ITの範囲で変化し、流量
は最大流量Qnから最小流量QTまでの範範囲内で
安定して制御できる。ガスバーナー１５の燃焼を
停止する場合はコイル１１への通電量を減じ、零
にすることにより比例制御弁６ａは初期状態とな
り完全に閉止がなされる。この時電流Ｉはスロー
プ検出回路２２の検出電流Isとなるが、減少方向
であるのでパルス入力回路２３は動作しない。 When the main valve 1 is opened and the main solenoid valve 2 is turned on, gas passes through the pilot passage 3 and is ejected from the pilot burner 4, and is ignited by the operation of an ignition element (not shown). On the other hand, gas also flows into the primary side of the proportional control valve 6a, and its supply pressure acts on the diaphragm 9 and the valve body 8, but the valve body 8 does not displace because the effective pressure-receiving areas are made equal. Further, since the valve body 8 is elastically pressed tightly against the valve seat 7 via the elastic member 8a by the closing elastic body 10a, there is no gas leakage to the downstream side of the valve seat 7. Next, when there is a request for heat, the controller 18 starts energizing the coil 11 of the proportional control valve 6a. At this time, the slope detection circuit 22 detects that the energization signal is in the increasing direction,
Therefore, the pulse input circuit 23 operates and pulses are input to the coil 11. Due to the pulse input, the plunger 14 is momentarily subjected to a large force and is displaced downward, the valve seat 7 and the valve body 8 are separated, and the lock is released. Thereafter, the controller 18 supplies a current value for slow ignition to the coil 11, and gas corresponding to the current value flows into the gas burner 15, receives the flame of the pilot burner 4, and performs slow ignition. Next, faucet 19
When the shower head is opened, the water undergoes heat exchange in the heat exchanger 16, becomes hot water, and is ejected from the shower head. The temperature of the hot water is detected by the temperature sensor 17, and the detection signal is compared with a signal from a hot water temperature setting device (not shown), and the value of the current to the coil 11 is determined according to the deviation signal. In other words, the current of the coil 11 is controlled so that the hot water temperature reaches the set temperature, and the combustion amount is controlled within the range from the minimum combustion amount to the maximum combustion amount. This situation will be explained in more detail based on the control characteristics shown in FIG. In FIG. 4, the horizontal axis shows the current value supplied to the coil 11, and the vertical axis shows the control gas flow rate of the proportional control valve 6a. When there is a heat request, the controller 18 starts energizing the coil 11. At this time, near the zero point ( Is ) of the current value, the slope detection circuit 22 detects that the current is increasing, and turns on the pulse input circuit 23. Pulse input circuit 2
3 instantaneously supplies the coil 11 with a pulse current Ir larger than the full opening current In of the proportional control valve 6a, and as a result, the valve body 8 is displaced downward against the press-fit holding force and is unlocked. . At this time, gas flows into the downstream side of the valve seat 7, but only momentarily, and the effect of removing air from the piping section from the proportional control valve 6a to the gas burner 15, in other words, a pre-purge effect is obtained. Immediately thereafter, the coil current is limited by the controller 18 to the slow ignition current I p , the gas flow rate becomes Q p , and the pre-purge effect quickly causes slow ignition. After slow ignition, the control current changes in the range of I n to I T according to the signal from the temperature sensing element 17, and the flow rate can be stably controlled within the range from the maximum flow rate Q n to the minimum flow rate Q T. When the combustion of the gas burner 15 is to be stopped, the amount of current applied to the coil 11 is reduced to zero, thereby bringing the proportional control valve 6a into an initial state and completely closing the proportional control valve 6a. At this time, the current I becomes the detection current Is of the slope detection circuit 22, but since it is in the decreasing direction, the pulse input circuit 23 does not operate.
このように本実施例では、弾性部材８ａを介し
て弁体８を弁座７へ閉止用弾性体１０ａの作用に
より弾力的に押し付けて完全な閉止を行い、且つ
弾性体８ａを設けたことによる弁座７の弁体８の
ロツクをロツク解除回路２１により点火時のみ強
制離反するようにし、比例制御弁６ａの弁閉止機
能を実現するとともに制御特性の悪化を防止する
ようにしたものであり、閉止機能を付加したこと
により比例制御弁６ａの閉止専用の電磁弁を不要
とすることができ、ガス燃焼制御装置の低コスト
化とコンパクト化を実現するとともに安定した制
御性能を得ることができる。このことは、湯温変
動が少なく且つコンパクトな給湯器を実現するも
のである、またロツク解除回路２１は通電量の零
点付近での増減の方向を検出するスロープ検出回
路２２とスロープ検出回路２２の信号が増加方向
にある時のみパルス信号をコイル１１へ供給する
パルス入力回路２３で構成したので、ガスバーナ
ー１５の点火時のみパルス入力を供給する手段を
コンパクト化でき、また、検出電流Isもしくは、
パルス入力量Irを必要に応じて容易に可変でき
る。さらに比例制御弁６ａのロツク解除直後に緩
点火を行うため、初期点火時の比例制御弁６ａか
らガスバーナー１５に至る配管内のエアーを排除
した後に緩点火流量Qpが流れ、スムーズかつ確
実な緩点火がなされれる。また比例制御弁６ａを
ガバナ部Ａに電磁駆動部Ｂの力を作用させる圧力
制御型とすることにより、ガスガバナを別設する
必要がなくコンパクト化が実現できる。 In this way, in this embodiment, the valve body 8 is elastically pressed against the valve seat 7 via the elastic member 8a by the action of the closing elastic body 10a to achieve complete closing, and this is achieved by providing the elastic body 8a. The lock of the valve body 8 of the valve seat 7 is forcibly released only at the time of ignition by the lock release circuit 21, thereby realizing the valve closing function of the proportional control valve 6a and preventing deterioration of the control characteristics. By adding the closing function, it is possible to eliminate the need for a solenoid valve dedicated to closing the proportional control valve 6a, making it possible to realize cost reduction and downsizing of the gas combustion control device, and to obtain stable control performance. This realizes a compact water heater with less fluctuation in hot water temperature. Also, the lock release circuit 21 is connected to a slope detection circuit 22 that detects the direction of increase or decrease in the amount of current near the zero point. Since the pulse input circuit 23 is configured to supply a pulse signal to the coil 11 only when the signal is in the increasing direction, the means for supplying the pulse input only when the gas burner 15 is ignited can be made compact. ,
The pulse input amount I r can be easily varied as required. Furthermore, since slow ignition is performed immediately after the proportional control valve 6a is unlocked, the slow ignition flow rate Q p flows after removing the air in the piping from the proportional control valve 6a to the gas burner 15 at the time of initial ignition, resulting in smooth and reliable ignition. Slow ignition is done. Furthermore, by making the proportional control valve 6a a pressure control type that applies the force of the electromagnetic drive section B to the governor section A, there is no need to separately install a gas governor, and compactness can be realized.
発明の効果
以上詳述したように本発明は、弁部に閉止用の
弾性部材を有する閉止機能付比例制御弁を備えた
ガス燃焼制御装置において、弾性部材を設けたこ
とによる弁体と弁座の弁ロツクをガスバーナーへ
の着火時のみ瞬間的に強制離反させるロツク解除
回路を設けたものであり、以下の効果が得られ
る。Effects of the Invention As described in detail above, the present invention provides a gas combustion control device equipped with a proportional control valve with a closing function that has an elastic member for closing in the valve portion, and a valve body and a valve seat that are provided with an elastic member. This device is equipped with a lock release circuit that momentarily forcibly releases the valve lock only when the gas burner is ignited, and the following effects can be obtained.
(1) バーナーの点火毎に比例制御弁の全開信号よ
りも大きな駆動信号で強制開弁し、ロツク解除
した後に緩点火及び比例制御に移行するため弁
部に弾性部材を設けて閉止する構造の比例制御
弁においても安定して高精度の流量制御が実現
できる。このことは特に長期間放置した後に比
例制御弁を動作させる場合に好適である。また
これによりガス燃焼制御装置の耐久性も向上す
る。(1) Each time the burner is ignited, the proportional control valve is forcibly opened with a drive signal greater than the full open signal, and after the lock is released, the valve is closed by providing an elastic member in order to shift to slow ignition and proportional control. Stable and highly accurate flow control can be achieved even with proportional control valves. This is particularly suitable when operating the proportional control valve after it has been left unused for a long period of time. This also improves the durability of the gas combustion control device.
(2) 閉止機能と高精度の比例制御機能を実現でき
るため閉止専用の電磁弁が不要となり、小型で
低コストのガス燃焼制御装置が実現できるとと
もに、最小制御流量をより小さく設定できるた
め最小絞り比（T.D.R）の高いバーナーに対応
できる。(2) Since it is possible to realize a closing function and a high-precision proportional control function, a solenoid valve dedicated to closing is not required, making it possible to realize a small and low-cost gas combustion control device, and because the minimum control flow rate can be set smaller, the minimum throttle Compatible with burners with high TDR.
(3) ロツク解除動作により比例制御弁からバーナ
ーに至る配管系のエアー抜き効果（プリパージ
効果）が得られ、その後に緩点火が行われるた
め確実かつ安全に着火が行える。(3) The lock release action provides an air purge effect (pre-purge effect) from the piping system from the proportional control valve to the burner, and then slow ignition is performed, allowing reliable and safe ignition.
第１図は従来のガス燃焼制御装置の構成図、第
２図は同装置における比例制御弁の制御特性図、
第３図は本発明の一実施例を示すガス燃焼制御装
置の構成図、第４図は同装置における比例制御弁
の制御特性図である。
６ａ……比例制御弁、７……弁座、８……弁
体、８ａ……弾性部材、１０ａ……閉止用弾性
体、１７……感温素子、１８……制御器、２１…
…ロツク解除回路、２２……スロープ検出回路、
２３……パルス入力回路。
Fig. 1 is a configuration diagram of a conventional gas combustion control device, Fig. 2 is a control characteristic diagram of a proportional control valve in the same device,
FIG. 3 is a configuration diagram of a gas combustion control device showing one embodiment of the present invention, and FIG. 4 is a control characteristic diagram of a proportional control valve in the same device. 6a... Proportional control valve, 7... Valve seat, 8... Valve body, 8a... Elastic member, 10a... Closing elastic body, 17... Temperature sensing element, 18... Controller, 21...
...Lock release circuit, 22...Slope detection circuit,
23...Pulse input circuit.
Claims (1)
し、且つ前記弁体を閉弁方向に付勢する閉止用弾
性体を設けた閉止機能付比例制御弁と、ガスバー
ナーの着火時に瞬間的に前記比例制御弁の全開信
号よりも大きい駆動信号を該比例制御弁に供給
し、前記弁体と弁座の粘着ないし嵌着による弁ロ
ツクを解除するロツク解除回路と、燃焼負荷の温
度を検出する感温素子と、ロツク解除動作後に緩
点火信号を前記比例制御弁に供給するとともに、
前記感温素子の信号により前記比例制御弁を制御
する制御器とから構成したガス燃焼制御装置。 ２ ロツク解除回路は比例制御弁への通電量の零
点近傍での増減の方向を検出するスロープ検出回
路と、前記スロープ検出回路の検出信号が増加方
向にある時のみパルス信号を比例制御弁に供給す
るパルス入力回路とから構成した特許請求の範囲
第１項記載のガス燃焼制御装置。[Scope of Claims] 1. A proportional control valve with a closing function, which has an elastic member on at least one of a valve body and a valve seat, and a closing elastic body that biases the valve body in a valve closing direction; a lock release circuit that momentarily supplies a drive signal larger than a full-open signal of the proportional control valve to the proportional control valve when the burner is ignited to release the valve lock caused by sticking or fitting between the valve body and the valve seat; a temperature sensing element for detecting the temperature of the combustion load; and supplying a slow ignition signal to the proportional control valve after the lock release operation;
A gas combustion control device comprising a controller that controls the proportional control valve based on a signal from the temperature sensing element. 2 The lock release circuit includes a slope detection circuit that detects the direction of increase/decrease in the amount of current supplied to the proportional control valve near the zero point, and supplies a pulse signal to the proportional control valve only when the detection signal of the slope detection circuit is in the increasing direction. A gas combustion control device according to claim 1, comprising a pulse input circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58027927A JPS59153022A (en) | 1983-02-22 | 1983-02-22 | Controller for gas combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58027927A JPS59153022A (en) | 1983-02-22 | 1983-02-22 | Controller for gas combustion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59153022A JPS59153022A (en) | 1984-08-31 |
| JPH0319443B2 true JPH0319443B2 (en) | 1991-03-15 |
Family
ID=12234514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58027927A Granted JPS59153022A (en) | 1983-02-22 | 1983-02-22 | Controller for gas combustion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59153022A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5689553U (en) * | 1979-12-13 | 1981-07-17 |
-
1983
- 1983-02-22 JP JP58027927A patent/JPS59153022A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59153022A (en) | 1984-08-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4204833A (en) | Safety control for furnace burner | |
| USRE30936E (en) | Safety control for furnace burner | |
| EP1629335B1 (en) | Convertible control device capable of regulating fluid pressure for multiple fluid types and associated method of use | |
| EP1629189A1 (en) | Fuel control mechansm and associated method of use | |
| US3796229A (en) | Dual valve actuator assembly | |
| JPH0333572A (en) | Flow regulating device | |
| CN217272115U (en) | Flow-limiting device for gas valve | |
| JPH0319443B2 (en) | ||
| US3502101A (en) | Thermostatic control device with a pressure regulated stepped opened diaphragm valve | |
| JP3025395B2 (en) | Flow control valve device | |
| US3373765A (en) | Electric reset for pneumatic sensor control | |
| GB2124342A (en) | Apparatus for controlling the flow of gas | |
| US9945583B2 (en) | Gas flow controller including valve decoupling mechanism | |
| JPS60168975A (en) | Gas flow-rate controller | |
| WO2024142452A1 (en) | Combustion device | |
| JPS6239330B2 (en) | ||
| GB1450053A (en) | Control systems for gaseous fuel fired appliances | |
| JP3842996B2 (en) | Gas water heater | |
| JPH0447212B2 (en) | ||
| JPS5836224B2 (en) | flow proportional control valve | |
| KR910004775B1 (en) | Controller for gas fueled heating apparatus | |
| JPS6344670Y2 (en) | ||
| JPS6114773Y2 (en) | ||
| JPS6126766Y2 (en) | ||
| JP2024092668A (en) | Combustion equipment |