JPH0823442B2 - Water amount control device for water heater - Google Patents
Water amount control device for water heaterInfo
- Publication number
- JPH0823442B2 JPH0823442B2 JP62311454A JP31145487A JPH0823442B2 JP H0823442 B2 JPH0823442 B2 JP H0823442B2 JP 62311454 A JP62311454 A JP 62311454A JP 31145487 A JP31145487 A JP 31145487A JP H0823442 B2 JPH0823442 B2 JP H0823442B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- amount control
- control valve
- amount
- water amount
- 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
Description
【発明の詳細な説明】 産業上の利用分野 本発明はガス瞬間式給湯機等の出湯量を制御する水量
制御装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water amount control device for controlling the amount of hot water discharged from a gas instantaneous water heater or the like.
従来の技術 従来のこの種の制御装置は、出湯温度が設定温度とな
るよう燃焼量を調節する燃料調節弁（例えばガス比例制
御弁）を備えている。2. Description of the Related Art A conventional control device of this type includes a fuel control valve (for example, a gas proportional control valve) that controls the combustion amount so that the outlet heated water temperature becomes a set temperature.
また給湯機の最大能力以上の熱負荷が要求された場合
には出湯温度が低下するので、これらを防止するために
最大能力を超える熱負荷要求がある場合には自動的に給
水量を絞る水量制御弁が設けられている。これらの水量
制御弁は一般的に直流モータで駆動されており、水量制
御弁の開度は水流量センサやタイマー等で調節するよう
になっている（例えば実開昭61−15447号公報，特公昭6
2−40624号公報，実開昭62−120154号公報）。If a heat load greater than the maximum capacity of the water heater is required, the hot water temperature will drop.Therefore, if there is a heat load request that exceeds the maximum capacity to prevent these, the amount of water to be supplied will be automatically reduced. A control valve is provided. These water volume control valves are generally driven by a DC motor, and the opening of the water volume control valve is adjusted by a water flow rate sensor, a timer, etc. Kosho 6
2-40624 and 62-120154.
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、水量制御弁に異
物が混入した場合、水量制御弁を駆動するモータがロッ
ク状態に陥って焼損したりするという問題があった。Problems to be Solved by the Invention However, in the above-described configuration, when a foreign substance is mixed in the water amount control valve, there is a problem that the motor that drives the water amount control valve falls into a locked state and burns.
本発明はかかる従来の問題を解消するもので、水量制
御弁の動作時間を制限することを目的とする。The present invention solves such a conventional problem, and an object thereof is to limit the operation time of the water amount control valve.
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水量制御装置は
熱交換器と、熱交換器を加熱するバーナと、前記熱交換
器の出口温度を検出して設定温度を得るべく燃焼量を調
節する燃焼量制御手段と、前記熱交換器の給水路中に設
けた水量検出器と前記燃焼室制御手段の熱要求負荷に応
じて出湯量を調節する水量制御弁と、前記水量制御弁に
よる出湯量の増加方向又は減少方向の弁開度動作に制限
時間を設け前記制限時間があらかじめ定められた時間値
を超えた場合には前記水量制御弁の動作を停止する水量
制御手段とを備えたものである。Means for Solving the Problems In order to solve the above problems, the water amount control device of the present invention is a heat exchanger, a burner for heating the heat exchanger, and a set temperature by detecting the outlet temperature of the heat exchanger. A combustion amount control means for adjusting the combustion amount to obtain the above, a water amount detector provided in the water supply path of the heat exchanger, and a water amount control valve for adjusting the amount of hot water discharged according to the heat demand load of the combustion chamber control means. , A water amount for stopping the operation of the water amount control valve when a time limit is set for the valve opening operation in the increasing or decreasing direction of the hot water discharge amount by the water amount control valve and the time limit exceeds a predetermined time value And a control means.
作用 本発明は上記した構成によって、水量制御弁の固着等
によるモータの過負荷状態による焼損事故を防止するこ
とができる。Action The present invention can prevent the burnout accident due to the overload state of the motor due to the sticking of the water amount control valve and the like by the above-mentioned configuration.
実施例 以下、本発明の実施例を添付図面にもとづいて説明す
る。Embodiments Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明の一実施例である給湯機の制御系統図
で、１は熱交換器、２は熱交換器１を加熱するバーナで
加熱された温水は給湯カラン３を介して給湯される。４
は熱交換器１で加熱された温水温度を検出する出湯温度
検出器、５は前記バーナ２に供給するガス量を調節する
燃料調節器、６は温度設定器、７は燃焼量制御手段で前
記温度設定器６で設定された温度になるよう出湯温度検
出器４の検出温度をフィードバックして燃料調節器５を
制御する。燃焼量制御手段７は一般的な比例，積分，微
分制御のPIDフィードバック制御で構成する。８は熱交
換器１に給水する水温を検出する入水温度検出器、９は
同給水量を検出する水量検出器、10は同給水量を制御す
る水量制御弁であり駆動モータ11によって開弁方向と絞
り方向で閉弁方向に駆動する。12は水量制御弁10を制御
する水量制御手段で、第２図示す制御内容を実行する。
第２図はマイクロコンピュータ等で構成した場合の動作
フローチャートを示す。FIG. 1 is a control system diagram of a water heater which is an embodiment of the present invention, in which 1 is a heat exchanger, 2 is hot water heated by a burner that heats the heat exchanger 1, and hot water is supplied through a hot water supply calor 3. It Four
Is a hot water outlet temperature detector for detecting the temperature of hot water heated by the heat exchanger 1, 5 is a fuel controller for adjusting the amount of gas supplied to the burner 2, 6 is a temperature setting device, and 7 is a combustion amount control means. The temperature detected by the outlet heated water temperature detector 4 is fed back so that the temperature is set by the temperature setting device 6, and the fuel controller 5 is controlled. The combustion amount control means 7 is composed of general proportional, integral, and derivative PID feedback control. 8 is a water temperature detector for detecting the temperature of water supplied to the heat exchanger 1, 9 is a water amount detector for detecting the same amount of water supplied, 10 is a water amount control valve for controlling the same amount of water supplied, and a drive motor 11 opens the valve in the opening direction. And it drives in the valve closing direction in the throttle direction. Reference numeral 12 is a water amount control means for controlling the water amount control valve 10, and executes the control contents shown in FIG.
FIG. 2 shows an operation flowchart in the case of being configured by a microcomputer or the like.
第２図において、ステップP1では温度設定器６で設定
される設定温度Tsと入水温度検出器８で検出した入水温
度Tiと給湯機の加熱能力QGから能力水量FLmaxを下記の
式で求める。In FIG. 2, in step P 1 , the capacity water amount FLmax is obtained from the set temperature Ts set by the temperature setting device 6, the water temperature Ti detected by the water temperature detector 8 and the heating capacity QG of the water heater by the following formula.
FLmax＝QG/Ts−Ti ステップP2では能力水量FLmaxと熱交換器１に給水し
ている水量を水量検出器９で検出した給水量FLとの偏差
水量ΔfLを求める。すなわちΔfL＝FLmax−FLとなる。FLmax = Request QG / Ts-Ti deviation water Delta] f L of the water supply amount F L In step P 2 in which the amount of water that the water supply ability water FLmax and the heat exchanger 1 is detected by the water amount detector 9. That is, Δf L = FLmax−F L.
ステップP3では前記ΔfLが規定内例えば±１以内に
あれば水量制御弁10を駆動するモータ11への通電をステ
ップP4で停止する。ΔfLが前記規定以上であればステッ
プP5でΔfLの符号に応じて水量制御弁10の開閉方向を判
定する。すなわちΔfLの符号がの時はFLmax＜FLの状
態で給水量が能力水量を越えておりステップP6でモータ
駆動制限タイマをセットし、ステップP7で水量制御弁10
を絞る弁閉信号を出力する。水量制御弁10は熱交換器１
へ流入する水量を減少させ、能力水量FLmax値に制御す
ることになる。In step P 3 , if the Δf L is within the specified range, for example, within ± 1, the energization of the motor 11 that drives the water amount control valve 10 is stopped in step P 4 . If Δf L is greater than or equal to the specified value, in step P 5 , the opening / closing direction of the water amount control valve 10 is determined according to the sign of Δf L. That is, when the sign of Δf L is, the water supply amount exceeds the capacity water amount in the state of FLmax <F L , the motor drive limit timer is set in step P 6 , and the water amount control valve 10 is set in step P 7.
Outputs a valve closing signal to throttle. Water flow control valve 10 is heat exchanger 1
The amount of water flowing into is reduced to control to the capacity water amount FLmax.
そしてステップP3で偏差水量ΔfLが前記規定内、例え
ば±１以内になればステップP4で水量制御弁10を駆動
するモータ11への通電を停止して水量制御を終了する。
この時、水量制御弁10に異物が混入して固着状態になっ
ていると、モータ11が過負荷状態となりステップP3の条
件が満足できずステップP6のモータ駆動制限タイマーが
タイムアップとなってステップP8に進み水量制御弁の動
作エラーをセット、ステップP9でモーター11への通電を
停止する。以後ステップP10で水量制御弁エラーの分岐
によってモータ11への通電を禁止することになる。The deviation amount of water Delta] f L is in the specified at step P 3, and ends the stop to water controls the power supply to the motor 11 for driving the water amount control valve 10 in step P 4 if within ± 1, for example.
At this time, if foreign matter enters the water flow control valve 10 and is stuck, the motor 11 becomes overloaded and the condition of step P 3 cannot be satisfied, and the motor drive limit timer of step P 6 times up. Te proceeds to step P 8 sets the operation error of the water control valve, which stops energizing the motor 11 in step P 9. It will prohibit power supply to the motor 11 by a branch of the water amount control valve error in a subsequent step P 10.
モータ駆動制限タイマーは水量制御弁の動作特性に合
せて設定する。The motor drive limit timer is set according to the operating characteristics of the water flow control valve.
一方ステップP5で偏差水量ΔfLの符号がの場合は、
FLmax＜FLの状態で給水量FLが能力水量FLmax値より小さ
い状態で水量制御弁10の開度を大きくすべく、前記の能
力水量オーバ時と同様にステップP11でモータ制限タイ
マーをセットし、ステップP12で弁開信号を出力すると
同時に弁開動作時間を制限する。On the other hand, if the sign of the deviation water amount Δf L is at step P 5 ,
FLmax <in order to increase the opening degree of the water amount control valve 10 in a state water supply amount F L is smaller than the capability water FLmax value in the state of F L, set the motor limit timer at step P 11 in the same manner as when the ability water over and limits the valve opening operation time and at the same time outputs the valve open signal in step P 12.
ステップP13は給湯機が燃焼している時のみ前記の水
量制御動作を実行するようになっている。Step P 13 is adapted to perform said water amount control operation only when the water heater is burning.
上記の構成において、水量制御弁の制御動作において
同一制御動作を時間制限する作用を有し、水量制御弁10
の故障状態使用が防止できるという効果がある。In the above-mentioned configuration, the control operation of the water amount control valve has a function of time-limiting the same control operation, and the water amount control valve 10
There is an effect that it is possible to prevent the use of the fault condition.
発明の効果 以上のように本発明の給湯機の水量制御装置によれ
ば、次の効果が得られる。Effects of the Invention As described above, according to the water amount control device of the water heater of the present invention, the following effects can be obtained.
水量制御弁の制御動作に制限時間を設けたことによ
り、弁部への異物かみ込みや固着による駆動モータの過
負荷状態が早やかに回避でき、焼損や制御回路の破壊等
が防止でき安全性が高まる。By setting a time limit for the control operation of the water flow control valve, the overload condition of the drive motor due to foreign matter being caught or stuck in the valve can be avoided quickly, and burnout and control circuit destruction can be prevented. The nature is enhanced.
第１図は本発明の給湯機の水量制御装置の制御系統図、
第２図は同水量制御手段の動作フローチャート図であ
る。 １……熱交換器、２……バーナ、７……燃焼量制御手
段、10……水量制御弁、12……水量制御手段。FIG. 1 is a control system diagram of a water amount control device for a water heater according to the present invention,
FIG. 2 is an operation flowchart of the water amount control means. 1 ... Heat exchanger, 2 ... Burner, 7 ... Combustion amount control means, 10 ... Water amount control valve, 12 ... Water amount control means.
Claims (1)
と、前記熱交換器の出口温度を検出して設定温度を得る
べく燃焼量を調節する燃焼量制御手段と、前記熱交換器
の給水路中に設けた水量検出器と前記燃焼量制御手段の
熱要求負荷に応じて出湯量を調節する水量制御弁と、前
記水量制御弁による出湯量の増加方向又は減少方向の弁
開度動作に制限時間を設け前記制限時間があらかじめ定
められた時間値を超えた場合には前記水量制御弁の動作
を停止する水量制御手段とを有する給湯機の水量制御装
置。1. A heat exchanger, a burner for heating the heat exchanger, a combustion amount control means for detecting an outlet temperature of the heat exchanger and adjusting a combustion amount to obtain a set temperature, and the heat exchanger. Water amount detector provided in the water supply passage of the device, a water amount control valve for adjusting the amount of hot water discharged according to the heat demand load of the combustion amount control means, and a valve opening degree for increasing or decreasing the amount of hot water discharged by the water amount control valve. A water amount control device for a water heater having a time limit for operation and water amount control means for stopping the operation of the water amount control valve when the time limit exceeds a predetermined time value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62311454A JPH0823442B2 (en) | 1987-12-09 | 1987-12-09 | Water amount control device for water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62311454A JPH0823442B2 (en) | 1987-12-09 | 1987-12-09 | Water amount control device for water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150746A JPH01150746A (en) | 1989-06-13 |
| JPH0823442B2 true JPH0823442B2 (en) | 1996-03-06 |
Family
ID=18017412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62311454A Expired - Lifetime JPH0823442B2 (en) | 1987-12-09 | 1987-12-09 | Water amount control device for water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0823442B2 (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5126340U (en) * | 1974-08-15 | 1976-02-26 | ||
| JPS56127870A (en) * | 1980-03-10 | 1981-10-06 | Hitachi Metals Ltd | Electric operating machine |
| JPS57130075U (en) * | 1981-02-09 | 1982-08-13 | ||
| JPS5833050A (en) * | 1981-06-03 | 1983-02-26 | Noritsu Co Ltd | Forced draft combustion type gas water heater |
| JPS5833051A (en) * | 1981-08-20 | 1983-02-26 | Matsushita Electric Ind Co Ltd | Controlling device of water heater |
| JPS58158444A (en) * | 1982-03-16 | 1983-09-20 | Matsushita Electric Ind Co Ltd | Controller for heating liquid |
| JPS58198640A (en) * | 1982-05-14 | 1983-11-18 | Matsushita Electric Ind Co Ltd | Control device for supplying and heating hot-water |
| JPS5932727A (en) * | 1982-08-18 | 1984-02-22 | Matsushita Electric Ind Co Ltd | Water and hot water mixing and feeding device |
| JPS59158931A (en) * | 1983-02-28 | 1984-09-08 | Toto Ltd | Gas instantaneous type hot-water supply device |
| JPS6131851A (en) * | 1984-07-25 | 1986-02-14 | Matsushita Electric Ind Co Ltd | Compound hot-water supplier |
| JPS6141084A (en) * | 1984-07-31 | 1986-02-27 | Shimadzu Corp | Controller for valve actuator |
| JPS6174048U (en) * | 1984-10-22 | 1986-05-19 | ||
| JPS61114047A (en) * | 1984-11-07 | 1986-05-31 | Toto Ltd | Hot-water supply device |
-
1987
- 1987-12-09 JP JP62311454A patent/JPH0823442B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150746A (en) | 1989-06-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080306 Year of fee payment: 12 |