JPH0434050B2 - - Google Patents
Info
- Publication number
- JPH0434050B2 JPH0434050B2 JP59261586A JP26158684A JPH0434050B2 JP H0434050 B2 JPH0434050 B2 JP H0434050B2 JP 59261586 A JP59261586 A JP 59261586A JP 26158684 A JP26158684 A JP 26158684A JP H0434050 B2 JPH0434050 B2 JP H0434050B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- water temperature
- incoming
- inlet
- temperature
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 123
- 238000005070 sampling Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation 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
- F23N2223/00—Signal processing; Details thereof
- F23N2223/06—Sampling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2225/00—Measuring
- F23N2225/08—Measuring temperature
- F23N2225/18—Measuring temperature feedwater temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N2237/00—Controlling
- F23N2237/02—Controlling two or more burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/18—Systems for controlling combustion using detectors sensitive to rate of flow of air or fuel
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- 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】
〈技術分野〉
本発明は、熱交換器の入口から入水口側に遡つ
た箇所に設けられた水温センサで入水温度を検出
し、検出された入水温に基づき出湯温度が任意の
設定値となるようにバーナの熱量を制御する湯沸
器等に於ける出湯温度のフイードフオワード制御
方法に関する。[Detailed Description of the Invention] <Technical Field> The present invention detects the incoming water temperature with a water temperature sensor installed at a location extending from the inlet of a heat exchanger to the water inlet side, and determines the outlet water temperature based on the detected incoming water temperature. The present invention relates to a feedforward control method for the outlet temperature of hot water in a water heater or the like, which controls the heat amount of a burner so that the temperature becomes an arbitrary set value.
〈従来技術〉
従来、熱交換器の入口から入水口側に遡つた箇
所に設けられた水温センサで入水温度を検出し、
検出された入水温に基づき出湯温度が任意の設定
値となるようにバーナの熱量を制御する湯沸器等
に於ける出湯温度のフイードフオワード制御方法
では、入水温度の検出位置と入水量との関係が無
視されており、入水口又は熱交換器入口の間に水
温センサを設け、その水温センサで検出された水
温に基づいてバーナの熱量を制御すれば十分であ
ると考えられていた。しかしながら、建物の中で
の熱利用が総合的に考慮されることが多くなり、
例えば、湯沸器や給湯器がソーラシステム等と組
み合わされて用いられる今日では、湯沸器等への
入水温が急激に変化することが考えられる。この
場合、入水温の温度のみに基づいて出湯温度を制
御するとすれば、実際に熱交換器に達している入
水の温度と検出された入水温とが異なり、バーナ
の能力の切換えが必要以上に速く行なわれる結
果、出湯温度が不安定になるおそれがある。<Prior art> Conventionally, the inlet water temperature is detected by a water temperature sensor installed at the point from the inlet of the heat exchanger to the water inlet side.
In the feed-forward control method of the hot water outlet temperature in water heaters, etc., which controls the amount of heat of the burner so that the outlet temperature becomes an arbitrary set value based on the detected inlet water temperature, the detection position of the inlet water temperature and the amount of inlet water are used. It was thought that it was sufficient to install a water temperature sensor between the water inlet or the heat exchanger inlet and control the amount of heat from the burner based on the water temperature detected by the water temperature sensor. . However, the use of heat in buildings is increasingly being considered comprehensively.
For example, in today's world where water heaters and water heaters are used in combination with solar systems and the like, it is conceivable that the temperature of water entering the water heater or the like may change rapidly. In this case, if the outlet water temperature is controlled based only on the incoming water temperature, the temperature of the incoming water that actually reaches the heat exchanger and the detected incoming water temperature will be different, and the burner capacity will need to be switched more than necessary. As a result, the hot water temperature may become unstable as a result.
〈発明の目的〉
本発明は、上述のような事情を鑑み、入水温の
変化と入水量とに対応して実際に熱交換器に達し
た入水に適する能力でバーナを運転させるように
し、もつて、急激な入水温の変化に対しても出湯
温度を十分に安定させることができるようにする
ことを目的とする。<Object of the invention> In view of the above-mentioned circumstances, the present invention operates a burner at a capacity suitable for the water that actually reaches the heat exchanger in response to changes in the water temperature and amount of water that enters the heat exchanger. The purpose of the present invention is to make it possible to sufficiently stabilize the outlet temperature even in the face of sudden changes in the incoming water temperature.
〈発明の構成〉
本発明は、上述の目的を達成するために、入水
管の熱交換器から入水口側に遡つた箇所に設けら
れた水温センサで入水温度を検出するとともに、
この水温センサの近傍に設けられた流量計５で入
水流量を検出し、この検出される入水温および入
水流量に基づき出湯温度が任意の設定値となるよ
うにバーナの熱量を制御する湯沸器等に於ける出
湯温度のフイードフオワード制御方法において、
入水温度を所定の時間ごとにサンプリングして記
憶する一方、入水流量に反比例して遡及したサン
プリングタイムの入水温度に基づきバーナの熱量
を制御することに特徴を有する。<Structure of the Invention> In order to achieve the above-mentioned object, the present invention detects the inlet water temperature with a water temperature sensor provided at a location extending from the heat exchanger of the inlet pipe to the water inlet side, and
A water heater that detects the incoming water flow rate with a flow meter 5 installed near the water temperature sensor, and controls the heat amount of the burner so that the outlet temperature becomes an arbitrary set value based on the detected incoming water temperature and incoming water flow rate. In the feed forward control method of hot water temperature in etc.,
It is characterized in that the inlet water temperature is sampled and stored at predetermined time intervals, and the amount of heat of the burner is controlled based on the inlet water temperature at the sampling time, which is inversely proportional to the inlet water flow rate.
〈実施例〉
以下、本発明の一実施例に用いる湯沸器の出湯
温フイードフオワード制御装置の一例の構成を第
１図に基づきする。<Embodiment> Hereinafter, the configuration of an example of a hot water outlet temperature feed forward control device for a water heater used in an embodiment of the present invention will be described based on FIG. 1.
この湯沸器の出湯温フイードフオワード制御装
置には、入水管１の熱交換器２から長さＬだけ遡
つた箇所に設けられた入水温を検出する水温セン
サ３を有する。この入水管１の長さＬの区間の内
容積はｑであり、入水が水温を検知されてから
この区間を通過して熱交換器２の入口に達する時
間は、入水流量をＱ／minとすれば、第２図に
示すように、ｔ＝ｑ／Ｑ（min）となることが明
らかである。 This hot water outlet temperature feed forward control device for the water heater has a water temperature sensor 3 provided at a position extending back a length L from the heat exchanger 2 of the water inlet pipe 1 to detect the temperature of the incoming water. The internal volume of the length L section of this water inlet pipe 1 is q, and the time it takes for the incoming water to pass through this section and reach the inlet of the heat exchanger 2 after the water temperature is detected is calculated by setting the inlet water flow rate to Q/min. Then, as shown in FIG. 2, it is clear that t=q/Q (min).
又、前記制御装置は、水温センサの出力を所定
時間ごとに繰返されるサンプリングタイムT-4，
T-3，……Ｔに入力して順次記憶するシフトレジ
スタ４と、入水管１の入水流量Ｑを検出する流量
計５と、流量計５の検出結果に基づき前記シフト
レジスタ４から読み出すべきデータのサンプリン
グタイムを演算する演算部６と、該演算部６の演
算結果に従つて選択されたサンプリングタイムの
入水温データを読み出し、その読み出された入水
温データおよび入水流量データに基づき出湯温度
が所定の設定温度となるようにバーナ７の能力を
切換制御する制御回路８とを備える。前記演算部
６は、例えばこの湯沸器の入水流量Ｑを最小４
／min、最大12／minの間で可変として、４
〜６／min、６〜８／min、８〜10／min、
10〜12／minの４段階にわけ、サンプリングタ
イムの周期τをｑ／12minに設定した場合には、
入水流量のそれぞれの段階に対応して、４回前の
サンプリングタイムT-4、３回前のサンプリング
タイムT-3、２回前のサンプリングタイムT-2、
直前回のサンプリングタイムT-1を選定するよう
に構成される。 The control device also controls the output of the water temperature sensor at sampling times T -4 , which are repeated at predetermined intervals.
T -3 , ... A shift register 4 which is input to T and stored in sequence, a flow meter 5 which detects the inflow flow rate Q of the water inlet pipe 1, and data to be read from the shift register 4 based on the detection result of the flow meter 5. A calculation unit 6 calculates the sampling time of the calculation unit 6, reads incoming water temperature data at a sampling time selected according to the calculation result of the calculation unit 6, and calculates the outlet water temperature based on the read incoming water temperature data and incoming water flow rate data. It also includes a control circuit 8 that switches and controls the capacity of the burner 7 so as to reach a predetermined set temperature. The calculation unit 6 may, for example, set the inflow water flow rate Q of the water heater to a minimum of 4.
/min, variable between maximum 12/min, 4
~6/min, 6~8/min, 8~10/min,
If the sampling time period τ is set to q/12 min, divided into 4 stages from 10 to 12/min,
Corresponding to each stage of the inflow flow rate, the sampling time T -4 of the 4th previous, the sampling time T -3 of the 3rd, the sampling time T -2 of the 2nd,
It is configured to select the previous sampling time T -1 .
次に、このように構成された湯沸器の出湯温フ
イードフオワード制御装置を用いる本発明を図示
された実施例に基づき詳細に説明する。 Next, the present invention will be described in detail based on the illustrated embodiment, which uses the thus configured hot water outlet temperature feed forward control device for a water heater.
入水は、入水管１の水温センサ３の設置箇所
か、第２図に示すように、入水流量Ｑに反比例す
る時間をかけて熱交換器２の入口に達する。この
入水の温度のデータは、第３図に示すように、水
温センサ３を介して所定のサンプリングタイムご
とにシフトレジスタ４に入力される。サンプリン
グタイムの周期をｑ／12minに設定してあるの
で、例えば、流量計５が検出した入水流量Ｑが４
〜６／minの場合には、演算部６は４回前のサ
ンプリングタイムT-4の入水温を有する入水が熱
交換器２の入口に達しているとみなして、シフト
レジスタ４から読み出すべき入水温データは４回
前のサンプリングタイムT-4のものと判定する。
この判定結果に従つて、制御回路８がシフトレジ
スタ４から４回前のサンプリングタイムT-4に得
られた入水温データを読み出し、所定の出湯温が
得られるようにバーナ７の能力を切換制御する。
また、入水流量Ｑが６〜８／minの場合には３
回前のサンプリングタイムT-3の入水温データ
が、８〜10／minの場合には２回前のサンプリ
ングタイムT-2の入水温データが、12／minの
場合には直前回のサンプリングタイムT-1の入水
温データがそれぞれ制御回路８に読み取られ、そ
れぞれの入水温データに対応するバーナ７の能力
切換制御が制御回路８によつて実行される。 The incoming water reaches the inlet of the heat exchanger 2 at the location where the water temperature sensor 3 is installed in the inlet pipe 1, or takes a time that is inversely proportional to the incoming water flow rate Q, as shown in FIG. As shown in FIG. 3, this data on the temperature of the incoming water is input to the shift register 4 via the water temperature sensor 3 at every predetermined sampling time. Since the sampling time period is set to q/12 min, for example, if the incoming water flow rate Q detected by the flow meter 5 is 4
6/min, the calculation unit 6 assumes that the incoming water having the incoming water temperature of T -4 from the previous four sampling times has reached the inlet of the heat exchanger 2, and determines the incoming water to be read from the shift register 4. The water temperature data is determined to be from sampling time T -4 , four times earlier.
According to this determination result, the control circuit 8 reads the input water temperature data obtained at the sampling time T -4 four times before from the shift register 4, and controls the ability of the burner 7 to switch so as to obtain the predetermined output water temperature. do.
In addition, when the water inflow flow rate Q is 6 to 8/min, 3
If the incoming water temperature data at the previous sampling time T -3 is 8 to 10/min, the incoming water temperature data at the second sampling time T -2 is 12/min, and if it is 12/min, the incoming water temperature data is at the previous sampling time. The input water temperature data of T -1 are each read by the control circuit 8, and the control circuit 8 executes capacity switching control of the burner 7 corresponding to each input water temperature data.
このようにして、バーナ７の能力切換えは実際
に熱交換器２の入口に達しているとみなされる入
水の温度に対応して行なわれるので、入水温が急
激に変化しても制御回路８の制御動作が熱交換器
２の入口に於ける入水温の変化に先行することが
なく、出湯温度が安定する。 In this way, the capacity of the burner 7 is switched in accordance with the temperature of the incoming water that is considered to have actually reached the inlet of the heat exchanger 2, so even if the incoming water temperature changes rapidly, the control circuit 8 The control operation does not precede changes in the incoming water temperature at the inlet of the heat exchanger 2, and the outgoing water temperature is stabilized.
もちろん、本発明は上述の一実施例に限定され
るものではなく、例えば、一定の出湯量の出湯が
オンオフさせられるような給湯器や湯沸器にも本
発明を適用できる。又、前述のシフトレジスタ５
に代えて複数段のラツチ回路を設け、前段のラツ
チ回路にラツチされた入水温データが順次後続の
各段のラツチ回路にラツチされるように構成して
もよい。 Of course, the present invention is not limited to the above-mentioned embodiment, and the present invention can be applied to, for example, a water heater or a water boiler in which the output of a fixed amount of hot water is turned on and off. In addition, the shift register 5 mentioned above
Instead, a plurality of stages of latch circuits may be provided, and the inlet water temperature data latched in the previous stage latch circuit may be sequentially latched in each subsequent stage latch circuit.
〈発明の効果〉
本発明は、以上説明したように、入水温度を所
定の時間ごとにサンプリングして記憶する一方、
入水流量に反比例して遡及したサンプリングタイ
ムの入水温度に基づきバーナの熱量を制御するの
で、入水温が急激に変化したときにも制御動作が
熱交換器２の入口に於ける入水温の変化に先行せ
ず、出湯温度を安定させることができる。また、
このような制御方法を採用することは、例えば、
湯沸器等にソーラシステムを接続する場合、温湯
暖房などを行なうために出湯の一部又は全部を入
水管に帰還させる強制循環を行なう場合などには
極めて有利である。更に、制御を行なう上でこの
ように入水量、従つて熱交換器から入水温センサ
までの間の距離を考慮に入れることは、入水温セ
ンサの取付箇所を広範囲にわたつて選択し得るこ
とになり、設計の自由度が高められることにもな
る。<Effects of the Invention> As explained above, the present invention, while sampling and storing the incoming water temperature at predetermined time intervals,
Since the amount of heat in the burner is controlled based on the inlet water temperature at the sampling time, which is inversely proportional to the inlet water flow rate, even when the inlet water temperature changes rapidly, the control operation can be adjusted to the change in the inlet water temperature at the inlet of the heat exchanger 2. It is possible to stabilize the hot water temperature without going ahead of time. Also,
Adopting such a control method, for example,
This is extremely advantageous when connecting a solar system to a water heater or the like, or when performing forced circulation in which part or all of the hot water is returned to the inlet pipe for hot water heating or the like. Furthermore, taking into account the amount of incoming water, and therefore the distance between the heat exchanger and the incoming water temperature sensor, when performing control, allows for a wide range of installation locations for the incoming water temperature sensor. This also increases the degree of freedom in design.
第１図は本発明の一実施に用いる湯沸器の出湯
温フイードフオワード制御装置の概略を示すブロ
ツク図、第２図は入水流量Ｑと入水が水温センサ
３から熱交換器２に至るまでに要する時間との関
係を示す入水流量／時間関係図、第３図は入水の
温度変化を例示する入水温度／時間関係図であ
る。
FIG. 1 is a block diagram showing an outline of a water heater output temperature feed forward control device used in one embodiment of the present invention, and FIG. 2 shows the incoming water flow rate Q and the amount of incoming water from the water temperature sensor 3 to the heat exchanger 2. FIG. 3 is a water inflow temperature/time relation diagram illustrating changes in the temperature of incoming water.
Claims (1)
箇所に設けられた水温センサ３で入水温度を検出
するとともに、この水温センサ３の近傍に設けら
れた流量計５で入水流量を検出し、この検出され
る入水温および入水流量に基づき出湯温度が任意
の設定値となるようにバーナ７の熱量を制御する
湯沸器等に於ける出湯温度のフイードフオワード
制御方法において、 入水温度を所定の時間ごとにサンプリングして
記憶する一方、 入水流量に反比例して遡及したサンプリングタ
イムの入水温度に基づきバーナ７の熱量を制御す
ることを特徴とする湯沸器等に於ける出湯温度の
フイードフオワード制御方法。[Scope of Claims] 1. Inlet water temperature is detected by a water temperature sensor 3 provided at a point in the water inlet pipe 1 extending back from the heat exchanger 2 to the water inlet side, and a flow meter provided near the water temperature sensor 3. 5 detects the incoming water flow rate, and controls the amount of heat of the burner 7 so that the outgoing water temperature becomes an arbitrary set value based on the detected incoming water temperature and incoming water flow rate. In the word control method, the water heater is characterized in that the temperature of the incoming water is sampled and stored at predetermined time intervals, and the amount of heat of the burner 7 is controlled based on the incoming water temperature at the sampling time, which is inversely proportional to the flow rate of the incoming water. Feed forward control method of hot water temperature in etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59261586A JPS61138021A (en) | 1984-12-10 | 1984-12-10 | Feed forward control method of supplying hot-water temperature at water heater or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59261586A JPS61138021A (en) | 1984-12-10 | 1984-12-10 | Feed forward control method of supplying hot-water temperature at water heater or the like |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61138021A JPS61138021A (en) | 1986-06-25 |
| JPH0434050B2 true JPH0434050B2 (en) | 1992-06-04 |
Family
ID=17363975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59261586A Granted JPS61138021A (en) | 1984-12-10 | 1984-12-10 | Feed forward control method of supplying hot-water temperature at water heater or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61138021A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02223352A (en) * | 1989-02-23 | 1990-09-05 | Tamagawa Seiki Co Ltd | Encoder for servo motor |
| JP4613459B2 (en) * | 2001-07-26 | 2011-01-19 | 株式会社ノーリツ | Hot water system |
| JP4835329B2 (en) * | 2006-08-30 | 2011-12-14 | 井関農機株式会社 | Tractor |
| JP5975427B2 (en) * | 2012-09-29 | 2016-08-23 | 株式会社ノーリツ | Hot water supply device and hot water storage type hot water supply system provided with the same |
| JP6822103B2 (en) * | 2016-12-01 | 2021-01-27 | 株式会社ノーリツ | Hot water supply device and control method of hot water supply device |
-
1984
- 1984-12-10 JP JP59261586A patent/JPS61138021A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61138021A (en) | 1986-06-25 |
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