JPH07111268B2 - Water heater controller - Google Patents
Water heater controllerInfo
- Publication number
- JPH07111268B2 JPH07111268B2 JP62311455A JP31145587A JPH07111268B2 JP H07111268 B2 JPH07111268 B2 JP H07111268B2 JP 62311455 A JP62311455 A JP 62311455A JP 31145587 A JP31145587 A JP 31145587A JP H07111268 B2 JPH07111268 B2 JP H07111268B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- hot water
- control means
- output
- 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 - Fee Related
Links
Landscapes
- Control Of Combustion (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、給湯温度の安定化を図った給湯機の制御装置
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 heater control device for stabilizing the hot water temperature.
従来の技術 従来のこの種の制御装置は、例えば実開昭61−21240号
公報に示されているように、フィードバック制御出力量
に比例した補正量を記憶し、各補正量を加算しながらフ
ィードフォワード出力量を補正するようになっていた。2. Description of the Related Art A conventional control device of this type stores a correction amount proportional to a feedback control output amount as shown in, for example, Japanese Utility Model Laid-Open No. 61-21240, and feeds it while adding each correction amount. It was designed to correct the amount of forward output.
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、フィードバック出
力に比例した補正量をフィードフォワード出力に加算し
てフィードバック出力量を減らす制御動作を繰返すた
め、ある負荷の定常値では補正ができても、給湯量や設
定温度が変更され負荷が急変した時、補正動作をその都
度行う必要があり、給湯負荷の変更による出湯温度の過
渡特性に問題があった。Problems to be Solved by the Invention However, in the above-described configuration, the correction amount proportional to the feedback output is added to the feedforward output to repeat the control operation to reduce the feedback output amount. Even if it can be done, when the hot water supply amount or the set temperature is changed and the load suddenly changes, it is necessary to perform the correction operation each time, and there is a problem in the transient characteristic of the hot water discharge temperature due to the change of the hot water supply load.
本発明はこのような従来の問題点を解消するもので、給
湯負荷の変更による出湯温度の過渡特性を改善すること
にある。The present invention solves such a conventional problem, and an object thereof is to improve transient characteristics of tapping temperature by changing a hot water supply load.
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給湯機の制御装置
は、フィードバック制御手段とフィードフォワード制御
手段の両出力操作量で燃焼調節器を付勢するとともに、
前記出力操作量をフィードフォワード制御出力量で除算
した係数値をフィードフォワード制御手段に乗算し、フ
ィードフォワード制御出力誤差を修正する学習制御手段
を備えたものである。Means for Solving the Problems In order to solve the above problems, the controller of the water heater of the present invention urges the combustion controller with both output manipulated variables of the feedback control means and the feedforward control means,
The learning control means is provided for correcting the feedforward control output error by multiplying the feedforward control means by a coefficient value obtained by dividing the output manipulated variable by the feedforward control output quantity.
作用 本発明は上記した構成によって、フィードフォワード制
御手段の出力値を給湯機の加熱負荷と合致させることが
できる。Action The present invention can match the output value of the feedforward control means with the heating load of the water heater by the above configuration.
実施例 以下、本発明の実施例を添付図面に基づいて説明する。
第１図は本発明の一実施例における湯温制御ブロック図
であり、第２図は給湯機の湯温制御概要図である。第２
図において、１は給湯栓、２は熱交換器、３はバーナで
ある。熱交換器２の給水路中には、給水温度を検出する
給水温度センサ４と給湯量を検出する流量センサ５と熱
交換器２からの出湯温度を検出する出湯温度センサ６を
設ける。７はバーナ３の燃焼量を調節する燃焼量調節器
である比例制御弁、８は出湯温度を設定する温度設定
器、９は第１図に示す湯温制御ブロックなどから構成す
る給湯機の制御器である。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a block diagram of hot water temperature control in one embodiment of the present invention, and FIG. 2 is a schematic diagram of hot water temperature control of a water heater. Second
In the figure, 1 is a hot water tap, 2 is a heat exchanger, and 3 is a burner. In the water supply passage of the heat exchanger 2, there are provided a water supply temperature sensor 4 for detecting the water supply temperature, a flow rate sensor 5 for detecting the amount of hot water supplied, and a hot water temperature sensor 6 for detecting the temperature of hot water discharged from the heat exchanger 2. Reference numeral 7 is a proportional control valve which is a combustion amount controller for adjusting the combustion amount of the burner 3, 8 is a temperature setting device for setting the hot water temperature, and 9 is a control of the water heater including the hot water temperature control block shown in FIG. It is a vessel.
次に第１図を用いてその制御器９の動作を説明する。フ
ィードフォワード制御手段10は給水温度センサ４で検出
した給水温度Twiと流量センサ５で検出した給湯量QLと
温度設定器８で設定された設定温度Tsと効率Ｗより負荷
QgをQg＝（Ts−Twi）×QL/Wなる関係式で演算し、この
負荷Qgに相当するガス量を設定すべくQF出力を得る。Next, the operation of the controller 9 will be described with reference to FIG. Feedforward control means 10 loads from the feed water temperature feed water temperature Twi and the flow rate sensor 5 set in the hot water supply amount Q L and temperature setter 8 detected by the set temperature Ts and efficiency W of the sensor 4 detected by
Qg is calculated by the relational expression of Qg = (Ts−Twi) × Q L / W, and the Q F output is obtained to set the gas amount corresponding to this load Q g.
フィードバック制御手段11は温度設定器８で設定された
設定温度Tsと出湯温度センサ６で検出された出湯温度Tw
oとの偏差量に基づいて、前記偏差量を補正すべくQB出
力をPID制御によって得る。前記QF出力とQB出力の合成
出力PV＝QF＋QBを燃焼量調節器７である比例制御弁に与
える。この時、フィードフォワード出力QFが負荷Qgと合
致しておればPV＝QF＋０となる。しかし流量値QLや給水
温度Twiなど検出誤差や効率Ｗの変動などによってQFに
誤差が生じる。誤差量が大きいと出湯温度が不安定とな
り湯温制御精度が悪化する。The feedback control means 11 controls the set temperature Ts set by the temperature setter 8 and the tapping temperature Tw detected by the tapping temperature sensor 6.
Based on the deviation amount from o, the Q B output is obtained by PID control so as to correct the deviation amount. The combined output P V = Q F + Q B of the Q F output and the Q B output is given to the proportional control valve which is the combustion amount controller 7. At this time, if the feedforward output Q F matches the load Q g, then P V = Q F +1. However errors in the Q F, such as by variation of the flow rate value Q L and the feed water temperature Twi such detection error and efficiency W. If the error amount is large, the hot water outlet temperature becomes unstable and the hot water temperature control accuracy deteriorates.
次に前記の誤差を修正する学習制御手段12を第３図に示
すフローチャートに基づいて説明する。学習制御手段12
は、出湯温度が安定した時点、すなわち温度設定器８で
設定される温度に達したステップP1で開始する。そし
て、その時の燃焼量調節器７を付勢する操作量出力PV値
とフィードフォワード出力QFよりステップP2で修正係数
Ｋを求める。前述したようにフィードフォワード出力QF
が負荷演算値Qgと合致しておれば操作量出力PVは、PV＝
QF＋０となるが、合致してなければPV＝QF＋QBでフィー
ドバック出力QBが残る。修正係数Ｋはフィードフォワー
ド出力QFを操作量出力PV値と等しくするもので下記の式
で求める。Next, the learning control means 12 for correcting the above error will be described with reference to the flowchart shown in FIG. Learning control means 12
Starts at step P 1 when the outlet heated water temperature stabilizes, that is, when the temperature set by the temperature setting device 8 is reached. Then, a correction factor K by the operation amount output P V value and the feedforward output Q F from step P 2 for biasing the combustion amount controller 7 at that time. As mentioned above, the feedforward output Q F
Is equal to the calculated load value Qg, the manipulated variable output P V is P V =
Q F +0, but if they do not match, P V = Q F + Q B and the feedback output Q B remains. The correction coefficient K makes the feedforward output Q F equal to the manipulated variable output P V value, and is calculated by the following formula.
PV＝QF＋QB Ｋ＝PV/QF 修正係数Ｋは上記の式で最適な値を得ることができる
が、演算処理手段をマイクロコンピュータ等で構成した
場合、外部ノイズ等で各種センサ、例えば給湯量センサ
５や出湯温度センサ6,給水温度センサ４の入力信号が乱
れてフィードフォワード出力QFやフィードバック出力QB
が突発的な変動を起すと修正係数Ｋが事実と大きく異っ
てしまう。P V = Q F + Q B K = P V / Q F The correction coefficient K can obtain an optimum value by the above formula, but when the arithmetic processing means is constituted by a microcomputer or the like, various sensors are generated due to external noise or the like. , For example, the input signals of the hot water supply amount sensor 5, the hot water supply temperature sensor 6, and the hot water supply temperature sensor 4 are disturbed, and the feed forward output Q F and the feedback output Q B
If a sudden change occurs, the correction coefficient K will be greatly different from the fact.
そこで、求めた修正係数ＫをステップP3に示すリミッタ
ー制御処理で検証する。Therefore, the obtained correction coefficient K is verified by the limiter control processing shown in step P 3 .
修正係数Ｋは初期値としてＫ＝１をセットしてある。ス
テップP4では求めた修正係数Ｋが１または１以上であれ
ばステップP5に移行し最大係数値と比較する。例えば最
大係数Ｋ＝1.5とすると、求めた係数Ｋが1.5以上ではス
テップP6で修正係数Ｋを1.5にセットする。The correction coefficient K is set to K = 1 as an initial value. If the obtained correction coefficient K is 1 or more in step P 4 , the process proceeds to step P 5 and is compared with the maximum coefficient value. For example, assuming that the maximum coefficient K = 1.5, if the calculated coefficient K is 1.5 or more, the correction coefficient K is set to 1.5 in step P 6 .
一方、ステップP4で修正係数Ｋが１以下の時はステップ
P7に移行して最小係数値と比較する。例えば最小係数Ｋ
＝0.5とすると、求めた係数Ｋが0.5以下ではステップP8
で修正係数Ｋを0.5にセットする。On the other hand, when the correction coefficient K is 1 or less in step P 4 , step
Move to P 7 and compare with the minimum coefficient value. For example, the minimum coefficient K
= 0.5, if the calculated coefficient K is 0.5 or less, step P 8
The correction coefficient K is set to 0.5 with.
以上のように修正係数Ｋの値はステップP9で制限値域に
更新される。As described above, the value of the correction coefficient K is updated to the limit value range in step P 9 .
そして、学習制御手段実行前の負荷Qgは修正係数Ｋによ
って真の負荷Qgiを次式で更新する。Then, for the load Qg before execution of the learning control means, the true load Qgi is updated by the following equation using the correction coefficient K.
Qgi＝Ｋ・Qg Qgi＝｛QL（Ts−Twi）/W｝・Ｋ 第４図はフィードフォワード出力QFの特性を示したもの
で横軸を負荷Qgiとするとフィードフォワード出力Q
Fは、初期の修正係数Ｋ＝１に対して破線に示すK1,K2に
修正されることになる。Qgi ＝ K ・ Qg Qgi ＝ {Q L (Ts-Twi) / W} ・ K Fig. 4 shows the characteristics of the feedforward output Q F. When the horizontal axis is the load Qgi, the feedforward output Q
F is corrected to K 1 and K 2 indicated by broken lines with respect to the initial correction coefficient K = 1.
すなわちK1＝Ｋ＞１でK2＝Ｋ＜１の領域を示す修正係数
Ｋのリミッタ値を0.5〜1.5で説明したが給湯機の能力や
制御精度から任意に設定すればよい。That is, the limiter value of the correction coefficient K indicating the region of K 1 = K> 1 and K 2 = K <1 has been described as 0.5 to 1.5, but it may be set arbitrarily according to the capacity and control accuracy of the water heater.
第５図は本発明の制御手段を実行した場合の給湯性能で
ある。FIG. 5 shows hot water supply performance when the control means of the present invention is executed.
横軸に時間、縦軸に出湯温度をとると給湯量QLを例えば
５と10に可変した場合、実線は学習制御手段実行前
で破線は実行後のように出湯温度の過渡性能が向上す
る。Time on the horizontal axis and the vertical axis takes a hot water temperature when varying the hot water supply amount Q L for example, 5 and 10, the solid line dashed in front running learning control means is improved tapping temperature transient performance of such a post-run .
発明の効果 以上のように本発明の給湯機の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 controller of the hot water supply device of the present invention, the following effects are obtained.
（１） フィードフォワード制御出力の誤差を燃焼負荷
演算値で修正するため、負荷全域での修正が可能となり
給湯負荷の変動に対する出湯温度の過渡特性が向上す
る。(1) Since the error of the feedforward control output is corrected by the combustion load calculation value, the correction can be made over the entire load, and the transient characteristic of the outlet heated water temperature with respect to the change of the hot water supply load is improved.
（２） 修正係数にリミッタを設けたことにより、フィ
ードフォワード制御出力の精度が向上するとともに、制
御装置の信頼性が増す。(2) By providing the limiter for the correction coefficient, the accuracy of the feedforward control output is improved and the reliability of the control device is increased.
（３） 流量センサや給湯温度センサ、および燃焼量調
節手段の特性変化等に対しても対応できる。(3) It is also possible to cope with changes in the characteristics of the flow rate sensor, the hot water temperature sensor, and the combustion amount adjusting means.
【図面の簡単な説明】 第１図は本発明の一実施例における給湯機の制御装置の
湯温制御ブロック図、第２図は同給湯機の湯温制御概要
図、第３図は同学習制御手段の動作フローチャート図、
第４図はフィードフォワード出力特性図、第５図は同給
湯性能図である。 ２……熱交換器、３……バーナ、４……給水温度セン
サ、５……流量センサ、６……出湯温度センサ、７……
燃焼量調節器、８……温度設定器、10……フィードフォ
ワード制御手段、11……フィードバック制御手段、12…
…学習制御手段。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of hot water temperature control of a hot water supply controller according to an embodiment of the present invention, FIG. 2 is a schematic diagram of hot water temperature control of the hot water supply device, and FIG. Operation flowchart of the control means,
FIG. 4 is a feedforward output characteristic diagram, and FIG. 5 is a hot water supply performance diagram thereof. 2 ... Heat exchanger, 3 ... Burner, 4 ... Water temperature sensor, 5 ... Flow rate sensor, 6 ... Hot water temperature sensor, 7 ...
Combustion amount controller, 8 ... Temperature setting device, 10 ... Feedforward control means, 11 ... Feedback control means, 12 ...
… Learning control means.
Claims (1)
と、前記熱交換器の給水路中に設けた流量センサと給水
温度センサと出湯温度センサと、前記バーナの燃焼量を
調節する燃焼量調節器と、出湯温度を設定する温度設定
器と、前記流量センサにより検出した給湯量と給水温度
センサにより検出した給水温度と温度設定器で設定され
る設定温度とから燃焼量を設定するフィードフォワード
制御手段と、前記出湯温度センサにより検出した出湯温
度と温度設定器で設定される設定温度との偏差量を補正
するフィードバック制御手段と、前記各制御手段の出力
操作量で燃焼調節器を付勢して出湯温度を設定温度に制
御するとともに前記出力操作量をフィードフォワード制
御手段の出力量で除算した係数値を前記フィードフォワ
ード制御手段に乗算してフィードフォワード制御手段の
出力誤差を修正する学習制御手段を設け、かつ前記係数
値にリミッタを設けた給湯機の制御装置。1. A heat exchanger, a burner for heating the heat exchanger, a flow rate sensor, a feed water temperature sensor, a hot water temperature sensor provided in a water supply passage of the heat exchanger, and a combustion amount of the burner is adjusted. A combustion amount controller, a temperature setting device that sets the hot water temperature, a hot water supply amount detected by the flow rate sensor, a water supply temperature detected by the water supply temperature sensor, and a set temperature set by the temperature setting device are used to set the combustion amount. A feedforward control means, a feedback control means for correcting a deviation amount between the hot water temperature detected by the hot water temperature sensor and a set temperature set by a temperature setting device, and a combustion controller by an output operation amount of each control means. The feed-forward control means is multiplied by a coefficient value obtained by dividing the output manipulated variable by the output quantity of the feed-forward control means while controlling the hot water discharge temperature to a set temperature by energizing. Provided learning control means for correcting the output error of the feed-forward control means Te, and the control device of the water heater provided with limiter to the coefficient values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62311455A JPH07111268B2 (en) | 1987-12-09 | 1987-12-09 | Water heater controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62311455A JPH07111268B2 (en) | 1987-12-09 | 1987-12-09 | Water heater controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01150742A JPH01150742A (en) | 1989-06-13 |
| JPH07111268B2 true JPH07111268B2 (en) | 1995-11-29 |
Family
ID=18017425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62311455A Expired - Fee Related JPH07111268B2 (en) | 1987-12-09 | 1987-12-09 | Water heater controller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07111268B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0462355A (en) * | 1990-06-29 | 1992-02-27 | Noritz Corp | Controller for water heater |
| JP2755106B2 (en) * | 1993-06-01 | 1998-05-20 | 三菱電機株式会社 | Heater control device |
| EP2049839B1 (en) * | 2006-08-02 | 2018-06-13 | Glutz AG | Method for the regulation of a burner |
| JP6064613B2 (en) * | 2013-01-18 | 2017-01-25 | 株式会社ノーリツ | Water heater |
| JP6653079B2 (en) * | 2016-01-27 | 2020-02-26 | 株式会社ノーリツ | Water heater |
| CN114576698B (en) * | 2022-03-03 | 2023-01-13 | 天津大学 | Multi-target monitoring based active disturbance rejection source network tail end collaborative self-optimization-seeking heat supply regulation and control method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128603A (en) * | 1983-01-13 | 1984-07-24 | Toshiba Corp | Process control device |
| JPS60235913A (en) * | 1984-05-08 | 1985-11-22 | Matsushita Electric Ind Co Ltd | Burning control device |
| JPS61228249A (en) * | 1985-04-02 | 1986-10-11 | Hanshin Electric Co Ltd | Temperature controller |
| JPS62119322A (en) * | 1985-11-18 | 1987-05-30 | Sanyo Electric Co Ltd | Method of controlling burner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5955250U (en) * | 1982-09-30 | 1984-04-11 | 株式会社ノーリツ | water heater |
-
1987
- 1987-12-09 JP JP62311455A patent/JPH07111268B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59128603A (en) * | 1983-01-13 | 1984-07-24 | Toshiba Corp | Process control device |
| JPS60235913A (en) * | 1984-05-08 | 1985-11-22 | Matsushita Electric Ind Co Ltd | Burning control device |
| JPS61228249A (en) * | 1985-04-02 | 1986-10-11 | Hanshin Electric Co Ltd | Temperature controller |
| JPS62119322A (en) * | 1985-11-18 | 1987-05-30 | Sanyo Electric Co Ltd | Method of controlling burner |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01150742A (en) | 1989-06-13 |
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| JPH01263456A (en) | Hot water feeder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |