JPH0622856U - Control device such as water heater - Google Patents
Control device such as water heaterInfo
- Publication number
- JPH0622856U JPH0622856U JP3047892U JP3047892U JPH0622856U JP H0622856 U JPH0622856 U JP H0622856U JP 3047892 U JP3047892 U JP 3047892U JP 3047892 U JP3047892 U JP 3047892U JP H0622856 U JPH0622856 U JP H0622856U
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- hot water
- calculation unit
- water
- feedforward
- 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
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
(57)【要約】
【目的】 給湯器、給湯器付風呂釜に於いて、設定温
度，入水温度，通水量等の変化が発生しても、不意の高
温出湯の危険性なく、急峻に設定温度に近づける。
【構成】 制御装置２は、フローセンサー４，入水サー
ミスタ５，出湯温度設定手段７により必要燃焼量を算出
するフィードフォワード演算部２ａと、該フィードフォ
ワード演算部２ａで算出された必要燃焼量を基準にし
て、燃焼制御範囲を設定し、その範囲内で、出湯温度設
定手段７と出湯サーミスタ５による温度偏差により燃焼
量を設定する、フィードバック演算部２ｂとで構成され
る。
(57) [Summary] [Purpose] In a water heater or bath tub with a water heater, even if there is a change in the set temperature, water inlet temperature, water flow rate, etc., there is no danger of unexpectedly high temperature hot water, and the temperature is set rapidly. Bring it closer to temperature. [Constitution] The control device 2 uses a flow sensor 4, a water thermistor 5, a hot water outlet temperature setting means 7 to calculate a required combustion amount as a feedforward calculation unit 2a, and a required combustion amount calculated by the feedforward calculation unit 2a as a reference. Then, the combustion control range is set, and within the range, the hot water outlet temperature setting means 7 and the feedback calculation unit 2b for setting the combustion amount by the temperature deviation due to the hot water discharge thermistor 5 are configured.
Description
【０００１】[0001]
この考案は、給湯器、給湯器付風呂釜（以下給湯器等という）の給湯制御に関 し、特にフィードフォワード制御式の給湯器等に関するものである。 The present invention relates to hot water supply control of a water heater and a bath kettle with a water heater (hereinafter referred to as a water heater), and more particularly to a feedforward control type water heater and the like.
【０００２】[0002]
従来より設定温度と入水温度との偏差及び通水量に基づいて必要燃焼量を算出 し、その算出量に応じて燃焼制御を行うフィードフォワード制御式の給湯器等が 知られており、更には、出湯開始初期に所定時間燃料制御を必要燃焼量以上に制 御し、かつ上記所定時間を設定温度と入水温度との偏差、通水量のうち少なくと も一方に基づいて可変設定する制御手段も考案されている。（例えば特告平３− ３１９７０） Conventionally, there has been known a feedforward control type water heater that calculates a required combustion amount based on the deviation between the set temperature and the incoming water temperature and the amount of water flow, and performs combustion control according to the calculated amount. Also devised a control means to control the fuel control to a required combustion amount or more for a predetermined time at the beginning of tapping and to variably set the above-mentioned predetermined time based on at least one of the deviation between the set temperature and the incoming water temperature and the water flow rate. Has been done. (For example, Japanese Patent Notification No. 3-31970)
【０００３】[0003]
しかしながら、このような従来例にあっては、燃料制御を必要燃焼量以上に制 御する、時間を算出して制御するという構造となっていたため、制御時間中の流 量変化等による必要燃焼量変化が発生した時（シングルレバー水栓等によって） 、燃料制御が行われないため、必要燃焼量が減少した時には設定温度をオーバー シュートしてしまい、不意の高温出湯の危険性があった。又必要燃焼量が増大し た場合には出湯温度の立ち上がりの向上効果がほとんど期待できなくなってしま うという問題点があった。 However, in such a conventional example, since the structure is such that the fuel control is controlled to be more than the required combustion amount, and the time is calculated and controlled, the required combustion amount due to the flow rate change during the control time, etc. When a change occurs (due to a single-lever faucet, etc.), fuel control is not performed, so when the required combustion amount decreases, the set temperature is overshot, and there is a risk of unexpected hot hot water discharge. In addition, there was a problem that when the required amount of combustion increased, the effect of improving the rise of the hot water temperature could hardly be expected.
【０００４】[0004]
この考案は、このような従来の問題点に着目してなされたもので、フィードフ ォワード制御時間を定めず、入水温度，設定温度，出湯量に基づいて算出された フィードフォワード値に範囲を設定して、その範囲内でフィードバック制御を行 うという制御とすることにより、上記問題点を解決することを目的としている。 The present invention was made by paying attention to such conventional problems, and does not set the feedforward control time, but sets the range to the feedforward value calculated based on the incoming water temperature, the set temperature, and the hot water discharge amount. Then, the purpose is to solve the above-mentioned problems by making feedback control within that range.
【０００５】[0005]
以下、この考案の実施例を図面に基づいて説明する。図１は、この考案の一実 施例を示す図である。まず構成を説明すると、１はバーナーであり、バーナー１ はこれに連なる制御装置２によって燃焼量を制御されている。熱交換器３の入口 側には流量を検知するフローセンサー４と、入水温度を検知する入水サーミスタ ５が接続され、また熱交換器３の出口側には出湯温度を検知する出湯サーミスタ ６が接続される。７は使用者により操作される出湯温度設定手段であり、制御装 置２と電気的に接続されている。 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. First, the structure will be described. Reference numeral 1 is a burner, and the burner 1 is controlled in combustion amount by a control device 2 connected to the burner 1. A flow sensor 4 for detecting the flow rate and an incoming water thermistor 5 for detecting the incoming water temperature are connected to the inlet side of the heat exchanger 3, and an outlet hot water thermistor 6 for detecting the outgoing hot water temperature is connected to the outlet side of the heat exchanger 3. To be done. Reference numeral 7 denotes a hot water outlet temperature setting means operated by the user, which is electrically connected to the control device 2.
【０００６】 次に制御装置２について図２に基づいて説明する。制御装置２はフィードフォ ワード演算部２ａ、フィードバック演算部２ｂ、燃焼制御部２ｃ等からなり、定 常出湯時においては、出湯温度設定手段７で設定された設定温度ＴＳと入水サー ミスタ５で検出された入水温度ＴＣとの偏差と、フローセンサー４で検出された 通水量Ｑとに基づいてフィードフォワード演算部２ａにおいて必要燃焼量Ｇが算 出される。Next, the control device 2 will be described with reference to FIG. The control device 2 is composed of a feedforward calculation unit 2a, a feedback calculation unit 2b, a combustion control unit 2c, etc., and at the time of constant hot water discharge, the set temperature TS set by the hot water discharge temperature setting means 7 and the incoming water thermistor 5 are detected. Based on the deviation from the entered water temperature TC and the water flow rate Q detected by the flow sensor 4, the required combustion amount G is calculated in the feedforward calculation unit 2a.
【０００７】 すなわち、Ｇ＝（ＴＳ−ＴＣ）×Ｑ÷Ｋを演算する。Ｋは熱効率である。また フィードバック演算部２ｂにおいて、出湯温度設定手段７で設定された設定温度 ＴＳと、出湯サーミスタ６で検出された出湯温度ＴＨとの偏差ｅと、前回の偏差 ｅ’を用いて操作変化量Ｕ’を導くファジィ演算、もしくは従来からあるＰＩＤ 演算により操作量Ｕを算出する。That is, G = (TS-TC) × Q ÷ K is calculated. K is thermal efficiency. Further, in the feedback calculation unit 2b, the operation change amount U ′ is calculated by using the deviation e between the set temperature TS set by the hot water temperature setting means 7 and the hot water temperature TH detected by the hot water thermistor 6 and the previous deviation e ′. The manipulated variable U is calculated by a fuzzy calculation that leads to the above or a conventional PID calculation.
【０００８】 フィードフォワード演算部２ａにより算出された必要熱量Ｇに基づき、燃焼制 御部２ｃで必要熱量Ｇに該当する操作値Ｕffを算出し、そのＵffに上限範囲Δma xを加えたものをＵmaxとし、下限範囲Δminを減じたものをＵminとする。（Δma x，Δminは定数又は変数）すなわち、Ｕmin＜Ｕff＜ｕmaxの関係が成り立つ。Based on the required heat amount G calculated by the feedforward calculation unit 2a, the combustion control unit 2c calculates an operation value Uff corresponding to the required heat amount G, and the value obtained by adding the upper limit range Δmax to the Uff is Umax. Umin is obtained by subtracting the lower limit range Δmin. (Δmax and Δmin are constants or variables) That is, the relationship of Umin <Uff <umax is established.
【０００９】 ここでフィードバック演算部２ｂで算出されたＵの値を上限値Ｕmaxと下限値 Ｕminの間の値になるように演算する。すなわち燃焼出力操作量Ｕoutは、 Ｕmin≧Ｕの時にはＵout＝Ｕmin Ｕmin＜Ｕ＜Ｕmaxの時にはＵout＝Ｕ Ｕmax≦Ｕの時にはＵout＝Ｕmax となる制御である。Here, the value of U calculated by the feedback calculation unit 2b is calculated to be a value between the upper limit value Umax and the lower limit value Umin. That is, the combustion output manipulated variable Uout is a control such that when Umin ≧ U, Uout = Umin Umin <U <Umax, Uout = U Umax ≦ U, Uout = Umax.
【００１０】[0010]
次に作用を説明する。設定温度と入水温度との偏差に通水量を乗算した値に基 づいて算出された必要燃焼量に、例えばある一定量を加算した燃焼量を最大制御 値、また一定量を減算した燃焼量を最小制御値とし、その範囲内で設定温度と出 湯温度との偏差によるフィードバックにより燃焼量を設定する。 Next, the operation will be described. The required combustion amount calculated based on the difference between the set temperature and the incoming water temperature multiplied by the water flow rate, for example, is the maximum control value of the combustion amount obtained by adding a certain amount, or the combustion amount obtained by subtracting the certain amount. The minimum control value is set, and the combustion amount is set within that range by feedback based on the deviation between the set temperature and the tap water temperature.
【００１１】[0011]
以上のように、この考案によれば、フィードフォワード演算によって得られた 必要燃焼量を基準にして燃焼制御範囲を設定し、フィードバック制御を行い、フ ィードフォワード制御時間を限定しない制御としたため、設定温度，入水温度， 通水量の各条件において変化が発生しても良好な結果を得られ出湯温度がオーバ ーシュートして不意の高温出湯をする危険もなく急峻に設定温度に近づけること ができ、また範囲の設定のため、機器のバラツキを吸収できるので、制御開発も 従来より早くできるという効果が得られる。 As described above, according to the present invention, the combustion control range is set based on the required combustion amount obtained by the feedforward calculation, feedback control is performed, and the feedforward control time is not limited. Good results can be obtained even if changes occur in each of the temperature, water inlet temperature, and water flow rate, and the hot water outlet temperature can be rapidly approached to the set temperature without the risk of unexpected hot hot water discharge. Since the range is set, variations in equipment can be absorbed, and the effect is that control development can be faster than before.
【図１】本考案の一実施例を示す図である。FIG. 1 is a diagram showing an embodiment of the present invention.
【図２】本考案の一実施例を示す要部の機能ブロック図
である。FIG. 2 is a functional block diagram of an essential part showing an embodiment of the present invention.
【図３】本考案及び従来の出湯特性の比較図である。FIG. 3 is a comparison diagram of the present invention and conventional tapping characteristics.
１ バーナー ２ 制御部 ２ａ フィードフォワード演算部 ２ｂ フィードバック演算部 ２ｃ 燃焼制御部 ３ 熱交換器 ４ フローセンサー ５ 入水サーミスタ ６ 出湯サーミスタ ７ 出湯温度設定手段 ８ 燃料バルブ ９ 比例制御弁 1 burner 2 control unit 2a feed forward calculation unit 2b feedback calculation unit 2c combustion control unit 3 heat exchanger 4 flow sensor 5 water entry thermistor 6 hot water thermistor 7 hot water temperature setting means 8 fuel valve 9 proportional control valve
Claims (1)
てフィードフォワード要素を算出するフィードフォワー
ド演算部と、設定温度・出湯温度間の偏差を用いてフィ
ードバック要素を算出するフィードバック演算部とを有
する給湯器等の制御装置に於いて、前記フィードフォワ
ード演算部への各入力値が変化した時にフィードバック
演算による出力値にフィードフォワード演算による範囲
を定めたことを特徴とした給湯器等の制御装置。1. A feedforward calculation unit for calculating a feedforward element based on an incoming water temperature, a set temperature, an amount of discharged hot water, and the like, and a feedback calculation unit for calculating a feedback element using a deviation between the set temperature and the discharged hot water temperature. In a control device for a water heater or the like, a control device for a water heater or the like characterized in that when a respective input value to the feedforward calculation unit changes, a range by the feedforward calculation is set for an output value by a feedback calculation. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3047892U JPH0622856U (en) | 1992-04-08 | 1992-04-08 | Control device such as water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3047892U JPH0622856U (en) | 1992-04-08 | 1992-04-08 | Control device such as water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0622856U true JPH0622856U (en) | 1994-03-25 |
Family
ID=12304958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3047892U Pending JPH0622856U (en) | 1992-04-08 | 1992-04-08 | Control device such as water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0622856U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271045A (en) * | 1988-09-06 | 1990-03-09 | Rinnai Corp | Controller for hot water supplying apparatus |
-
1992
- 1992-04-08 JP JP3047892U patent/JPH0622856U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271045A (en) * | 1988-09-06 | 1990-03-09 | Rinnai Corp | Controller for hot water supplying apparatus |
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