JPH07174408A - Method for operating bypass control valve during standby for re-supply of hot water in hot water supplier - Google Patents
Method for operating bypass control valve during standby for re-supply of hot water in hot water supplierInfo
- Publication number
- JPH07174408A JPH07174408A JP5345016A JP34501693A JPH07174408A JP H07174408 A JPH07174408 A JP H07174408A JP 5345016 A JP5345016 A JP 5345016A JP 34501693 A JP34501693 A JP 34501693A JP H07174408 A JPH07174408 A JP H07174408A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- bypass
- valve
- time
- solenoid valve
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 332
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000002485 combustion reaction Methods 0.000 claims abstract description 91
- 238000011017 operating method Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 8
- 238000001514 detection method Methods 0.000 description 14
- 238000002156 mixing Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、バイパスミキシング方
式の給湯器の再出湯待機中におけるバイパス制御弁の動
作方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a bypass control valve while a hot water supply device of a bypass mixing system is on standby for re-hot water.
【0002】[0002]
【従来の技術】図6には、バイパスミキシング方式の給
湯器の一例の模式図が示されている。同図において、燃
焼加熱機構であるバーナ7と熱交換器2が燃焼ユニット
ケース24内に設けられ、器具ケース1に収容されてお
り、バーナ7のガス導入口にはガスノズル6が対向配置
され、このガスノズル6に通じるガス管14には、ガス供
給量を開弁量によって制御する比例弁8と、管路の開閉
を行う電磁弁10とが介設されており、バーナ7の下方側
には燃焼ファン13が設けられている。2. Description of the Related Art FIG. 6 is a schematic view showing an example of a bypass mixing type water heater. In the same figure, the burner 7 which is a combustion heating mechanism and the heat exchanger 2 are provided in the combustion unit case 24 and housed in the instrument case 1, and the gas nozzle 6 is arranged to face the gas inlet of the burner 7. The gas pipe 14 communicating with the gas nozzle 6 is provided with a proportional valve 8 for controlling the gas supply amount by the valve opening amount and a solenoid valve 10 for opening and closing the pipe line, and on the lower side of the burner 7. A combustion fan 13 is provided.
【0003】熱交換器2の入口側には入水路として機能
する給水管3が接続されており、この給水管3の入口側
はフローセンサ等の流量センサ9を介して水道等の水供
給源側に接続されており、水道等の水供給源から給水管
3を介して熱交換器2側へ送り込まれる水の量が、流量
センサ9により検出されるようになっている。また、給
水管3には、水供給源から給水管3を介して熱交換器2
側に入水する水の温度を検出するサーミスタ等の入水温
度センサ18が設けられている。A water supply pipe 3 functioning as a water inlet is connected to the inlet side of the heat exchanger 2, and the inlet side of the water supply pipe 3 is connected to a water supply source such as tap water via a flow sensor 9 such as a flow sensor. The flow rate sensor 9 detects the amount of water sent from the water supply source such as tap water to the heat exchanger 2 side through the water supply pipe 3. Further, the heat exchanger 2 is connected to the water supply pipe 3 through the water supply pipe 3 from the water supply source.
An incoming water temperature sensor 18 such as a thermistor for detecting the temperature of the incoming water is provided.
【0004】熱交換器2の出口側には出湯路として機能
する給湯管11が接続されており、給湯管11には出湯湯温
を検出するサーミスタ等の出湯温度センサ16が設けられ
ており、給湯管11の先端側は所望の給湯場所、この図で
はシンク43上へと配管され、シンク近傍の配管位置には
給湯栓12が取り付けられている。A hot water supply pipe 11 functioning as a hot water discharge passage is connected to the outlet side of the heat exchanger 2, and a hot water supply temperature sensor 16 such as a thermistor for detecting the hot water discharge temperature is provided in the hot water supply pipe 11. The tip end side of the hot water supply pipe 11 is piped to a desired hot water supply place, which is a sink 43 in this figure, and a hot water supply plug 12 is attached to a pipe position near the sink.
【0005】また、給水管3と給湯管11に連通して熱交
換器2を迂回するバイパス流路4が熱交換器2と並列に
配設されており、バイパス流路4の入口側は給水管3側
に接続され、出口先端は、バイパス流路4の開閉を行う
バイパス制御弁として機能するバイパス電磁弁15を介し
て給湯管11にミキシング部19で接続されている。なお、
一般的には、給湯器の燃焼が行われていないときは、バ
イパス電磁弁15は閉じた状態となっている。Further, a bypass passage 4 which communicates with the water supply pipe 3 and the hot water supply pipe 11 and bypasses the heat exchanger 2 is arranged in parallel with the heat exchanger 2, and the inlet side of the bypass passage 4 is supplied with water. The outlet end is connected to the pipe 3 side, and is connected to the hot water supply pipe 11 at the mixing portion 19 via a bypass solenoid valve 15 that functions as a bypass control valve that opens and closes the bypass flow path 4. In addition,
Generally, when the water heater is not burning, the bypass solenoid valve 15 is closed.
【0006】給湯器内には熱交換器2の加熱制御等を行
う制御装置20が設けられており、制御装置20には演算回
路(図示せず)が設けられている。また、制御装置20に
は、前記入水温度センサ18と、流量センサ9と、出湯温
度センサ16と、バイパス制御弁15の各検出信号が加えら
れており、この制御装置20には温度設定部等を有するリ
モコン21が接続されており、制御装置20は、前記各検出
信号とリモコン21からの設定温度等の信号を受けて、給
湯器の燃焼運転を行っている。すなわち、制御装置20
は、給湯栓12が開けられて流量センサ9により作動水量
以上の給水水量が検知されたときに、燃焼ファン13を回
転し、燃焼ファン13の回転数が安定回転領域に入ってい
ることを確認して、電磁弁10と比例弁8を開け、バーナ
7の点火を行う。A controller 20 for controlling heating of the heat exchanger 2 and the like is provided in the water heater, and the controller 20 is provided with an arithmetic circuit (not shown). Further, the control device 20 is added with respective detection signals of the inlet water temperature sensor 18, the flow rate sensor 9, the hot water temperature sensor 16, and the bypass control valve 15. The control device 20 has a temperature setting unit. A remote controller 21 having the above components is connected, and the control device 20 receives the detection signals and signals such as the set temperature from the remote controller 21 and performs the combustion operation of the water heater. That is, the control device 20
Confirms that the combustion fan 13 is rotated when the hot water supply plug 12 is opened and the amount of supplied water equal to or greater than the amount of working water is detected by the flow rate sensor 9, and that the rotation speed of the combustion fan 13 is within the stable rotation region. Then, the solenoid valve 10 and the proportional valve 8 are opened, and the burner 7 is ignited.
【0007】そして、上記のようにバーナ7への点火が
行われて着火され、バーナ燃焼が行われると、熱交換器
2を通る水は加熱されて湯になり、この湯は給湯管11を
通っていく。また、その一方で、バイパス流路4に設け
られているバイパス電磁弁15が開かれ、バイパス流路4
からの水が給湯管11側に送られ、前記熱交換器2を通っ
た湯がミキシング部19に至ったときに、熱交換器2側か
らの湯がバイパス流路4を経た加熱されない水と合流混
合して、使用温度の湯が作り出され、この湯はシンク43
内に出湯されて使用される。When the burner 7 is ignited and ignited as described above and burner combustion is performed, the water passing through the heat exchanger 2 is heated to hot water, and this hot water flows through the hot water supply pipe 11. Go through. On the other hand, on the other hand, the bypass solenoid valve 15 provided in the bypass passage 4 is opened, and the bypass passage 4 is opened.
When the water from the heat exchanger 2 is sent to the hot water supply pipe 11 side and the hot water passing through the heat exchanger 2 reaches the mixing section 19, the hot water from the heat exchanger 2 side passes through the bypass passage 4 and is not heated. Combined and mixed to produce hot water at the working temperature, which is the sink 43
It is used by tapping hot water inside.
【0008】なお、制御装置20は、バーナ7着火直後に
は、フィードフォワード制御(出湯温度センサ16で出湯
温度を検出することなく、予め設定したガス量供給パタ
ーンに従って燃焼を行わせる制御方式)を行い、その
後、前記演算回路によるPID演算等により、フィード
バック制御(出湯温度センサ16により出湯温度を検出
し、出湯温度が設定温度に近づくようにPID演算によ
りガス供給量、つまり、比例弁8の開弁量を制御する方
式)を行うようになっている。Immediately after the burner 7 is ignited, the control device 20 performs feedforward control (a control method in which combustion is performed according to a preset gas amount supply pattern without detecting the discharge hot water temperature sensor 16). After that, feedback control is performed by PID calculation or the like by the arithmetic circuit (the hot water temperature sensor 16 detects the hot water temperature, and the PID calculation is performed so that the hot water temperature approaches the set temperature, that is, the proportional valve 8 is opened. The method of controlling the valve amount) is performed.
【0009】[0009]
【発明が解決しようとする課題】しかしながら、給湯器
の使用には、様々な使用パターンがあり、例えば、給湯
栓12を開けて給湯管11から出湯される湯を使用した後
に、一旦給湯栓12を閉めて給湯管11からの出湯を停止さ
せ、少しの時間が経過した後に再び給湯栓12を開けて給
湯管11からの出湯を行うこともあるし、給湯管11からの
出湯停止後に、長い時間が経過した後に再び出湯を行う
こともある。However, there are various usage patterns in the use of the hot water heater, for example, after the hot water tap 12 is opened and hot water discharged from the hot water supply pipe 11 is used, the hot water tap 12 is once used. The hot water supply pipe 11 may be closed by closing the hot water supply pipe 11, and after a short time, the hot water supply tap 12 may be opened again to perform hot water supply from the hot water supply pipe 11. After a certain amount of time has passed, hot water may be discharged again.
【0010】そして、給湯管11からの出湯を停止させて
から給湯管11からの出湯を再び行うまでの待機時間が短
い場合には、図5の(a)の斜線部分Aに示すような、
熱交換器2の出口側からミキシング部19に至る給湯管11
内には前回給湯器を使用したときに給湯器の燃焼動作に
より暖められた熱い湯が残っており、さらに、前回燃焼
運転のときに暖められた熱交換器2の余熱が熱交換器2
内に滞留している湯に伝わって湯の後沸き現象が生じ、
熱交換器2内の湯がさらに熱くなり、再出湯の際に、こ
のような熱い湯がミキシング部19を介して給湯管11の先
端側に送り込まれていくにも拘わらず、バイパス流路4
のバイパス電磁弁15は常時は閉じた状態となっており、
制御装置20が、流量センサ9の検出信号から再出沸の開
始を判断してバーナ燃焼を行い、その後、バイパス電磁
弁15を開くまでには多少の時間の遅れがあるために、熱
交換器2側からの湯にバイパス流路4からの水が合流混
合しないままに、設定温度よりも熱いオーバーシュート
の湯がそのまま給湯管11の先端側からシンク43内に出湯
されることとなり、使用者が不快な思いをするといった
問題があった。When the waiting time from the stop of hot water discharge from the hot water supply pipe 11 to the restart of hot water discharge from the hot water supply pipe 11 is short, as shown by the hatched portion A in FIG.
Hot water supply pipe 11 from the outlet side of the heat exchanger 2 to the mixing section 19
The hot water that was warmed by the combustion operation of the water heater when the water heater was used last time remains inside, and the residual heat of the heat exchanger 2 that was warmed during the last combustion operation is the heat exchanger 2.
It is transmitted to the hot water staying inside and the after-boiling phenomenon occurs.
The hot water in the heat exchanger 2 becomes even hotter, and when the hot water is again discharged, such hot water is sent to the tip side of the hot water supply pipe 11 via the mixing portion 19, but the bypass passage 4
The bypass solenoid valve 15 of is always closed,
Since the control device 20 determines from the detection signal of the flow rate sensor 9 the start of re-evaporation, burner combustion is performed, and then the bypass solenoid valve 15 is opened, there is a slight delay, so the heat exchanger. The hot water from the bypass flow path 4 does not join and mix with the hot water from the 2 side, and hot water having an overshoot that is higher than the set temperature is discharged from the tip side of the hot water supply pipe 11 into the sink 43 as it is. Had the problem of feeling uncomfortable.
【0011】また、上記問題を解決するために、例え
ば、図5の(b)に示すように、バイパス流路4のバイ
パス電磁弁15を常に開けた状態としておき、給湯栓12が
開けられたときには、熱交換器2側からの湯にバイパス
流路4からの水が時間遅れなく瞬時に合流混合して給湯
管11の先端側から出湯されるようにすることは可能であ
るが、このようにすると、給湯栓12を閉めて一旦給湯管
11からの出湯を停止させた後に長い時間が経過した後、
給湯栓12を開けて再出湯を行うようなときに、図5の
(b)の斜線部分Aの湯は既に前回の燃焼動作と再出湯
までの長い時間により既に冷えた状態となっているのに
も拘わらず、この冷えた湯にさらにバイパス流路4から
の水が合流混合するために、給湯管11からは設定温度よ
りも温度の低い冷たいアンダーシュートの湯(水)が出
湯されてしまうこととなり、そうなると、前記と同様に
使用者が不快な思いをすることとなり、問題であった。In order to solve the above problem, for example, as shown in FIG. 5 (b), the bypass solenoid valve 15 of the bypass passage 4 is kept open and the hot water tap 12 is opened. At times, it is possible to mix the hot water from the heat exchanger 2 side with the water from the bypass flow path 4 instantaneously without time delay and let the hot water come out from the tip side of the hot water supply pipe 11. Then, close the hot water tap 12 and
After a long time has passed after stopping the hot water from 11
When the hot-water tap 12 is opened and hot water is to be discharged again, the hot water in the shaded area A in FIG. 5 (b) has already been cooled due to the previous combustion operation and the long time until the hot water is again discharged. Despite this, since the water from the bypass passage 4 merges and mixes with this cold hot water, cold undershoot hot water (water) having a temperature lower than the set temperature is discharged from the hot water supply pipe 11. In that case, the user feels uncomfortable as in the above case, which is a problem.
【0012】本発明は、上記従来の課題を解決するため
になされたものであり、その目的は、給湯器を停止させ
てから再出湯させるまでの待機時間の長短に拘わらず、
再出湯時にオーバーシュートやアンダーシュートの湯が
出湯されることを抑制し、設定温度に近い湯を出湯でき
る給湯器の再出湯待機中におけるバイパス制御弁の動作
方法を提供することにある。The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is, regardless of the length of the waiting time from when the water heater is stopped to when hot water is discharged again,
An object of the present invention is to provide a method for operating a bypass control valve during standby for re-emergence of a water heater that can suppress over-shooting and under-shooting hot water from being discharged during re-melting, and discharge hot water close to a set temperature.
【0013】[0013]
【課題を解決するための手段】上記目的を達成するため
に、本発明は次のように構成されている。すなわち、本
発明は、給湯器の熱交換器の入水路と出湯路とを連通し
て熱交換器を迂回するバイパス流路を設け、このバイパ
ス流路に流路の開閉を行うバイパス制御弁を設けてなる
給湯器の再出湯待機中におけるバイパス制御弁の動作方
法において、給湯燃焼の停止以降の再出湯開始時にオー
バーシュートの湯が出る給湯燃焼停止時からの経過時間
とアンダーシュートの湯が出る給湯燃焼停止時からの経
過時間の境界周辺の時間を弁切り換え時間として設定
し、給湯燃焼の停止時から給湯燃焼停止の経過時間を計
測し、給湯燃焼停止時から前記弁切り換え時間に達する
まではバイパス制御弁を開の状態にして再出湯に備えて
待機させ、弁切り換え時間に達した以降はバイパス制御
弁を閉状態にして再出湯に備えて待機することを特徴と
して構成されている。In order to achieve the above object, the present invention is constructed as follows. That is, the present invention provides a bypass flow path that bypasses the heat exchanger by communicating the inlet and outlet channels of the heat exchanger of the water heater, and a bypass control valve that opens and closes the flow path in the bypass flow path. In the operation method of the bypass control valve while waiting for re-emergence of the provided water heater, overshoot hot water is generated at the start of re-emergence after the stop of hot water combustion. Elapsed time after hot water combustion is stopped and undershoot hot water is emitted. The time around the boundary of the elapsed time from the hot water supply combustion stop is set as the valve switching time, the elapsed time from the hot water supply combustion stop to the hot water supply combustion stop is measured, and the time from the hot water supply combustion stop to the valve switching time is reached. It is characterized in that the bypass control valve is opened and waits for re-hot water, and after the valve switching time is reached, the bypass control valve is closed and waits for re-hot water. It is.
【0014】また、給湯の設定温度が高温設定であるか
低温設定であるかを判断し、低温設定であるときに前記
バイパス制御弁の動作方法を行うことも本発明の特徴的
な構成とされている。It is also a characteristic feature of the present invention to judge whether the set temperature of the hot water supply is a high temperature setting or a low temperature setting, and to perform the operation method of the bypass control valve when it is the low temperature setting. ing.
【0015】[0015]
【作用】上記構成の本発明において、給湯燃焼の停止以
降の再出湯開始時にオーバーシュートの湯が出る給湯燃
焼停止時からの経過時間と、アンダーシュートの湯が出
る給湯燃焼停止時からの経過時間の境界周辺の時間を弁
切り換え時間として設定し、給湯燃焼の停止時から給湯
燃焼停止の経過時間が前記弁切り換え時間に達するまで
は、バイパス制御弁を開の状態にして再出湯に備えるた
めに、熱交換器側から出湯路を通り出湯させる熱めの湯
とバイパス流路からの水が混合して出湯路からはオーバ
ーシュートの湯が出ることなく、設定温度に近い湯温の
湯が出湯される。In the present invention having the above-described structure, the elapsed time from the hot water supply combustion stop in which overshooting hot water comes out and the undershoot hot water comes out from the hot water supply combustion stop after restarting hot water supply after the stop of hot water supply combustion The time around the boundary of is set as the valve switching time, and the bypass control valve is opened to prepare for re-hot water from the time when hot water supply combustion is stopped until the elapsed time for hot water supply combustion stop reaches the valve switching time. , The hot water from the heat exchanger side that flows through the hot water passage and the water from the bypass flow passage are mixed, and there is no overshoot of hot water coming from the hot water passage. To be done.
【0016】また、給湯燃焼停止時からの経過時間が前
記弁切り換え時間に達した以降は、熱交換器の出口側か
らバイパス流路連通部に至る出湯路内の湯の温度は低く
なっているが、このとき、バイパス制御弁は閉状態にし
て再出湯に備えて待機させられるために、熱交換器側か
らの湯はバイパス流路からの水と混合することなく出湯
路から出湯されるために、出湯路からは設定温度に近い
湯温の湯が出湯される。Further, after the elapsed time from the stop of hot water supply combustion reaches the valve switching time, the temperature of the hot water in the hot water outlet passage from the outlet side of the heat exchanger to the bypass flow passage communicating portion is low. However, at this time, since the bypass control valve is closed and kept in standby in preparation for re-hot water, hot water from the heat exchanger side is discharged from the hot water discharge passage without being mixed with water from the bypass flow passage. In addition, hot water having a temperature close to the set temperature is discharged from the hot water passage.
【0017】[0017]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。なお、本実施例の説明において、従来例と同一名
称部分には同一符号を付し、その詳細説明は省略する。
図1には、本発明に係る給湯器の再出湯待機中における
バイパス制御弁の動作方法によりバイパス制御弁を制御
する制御機構のブロック図が示されている。なお、本実
施例の給湯器は、図6に示した従来の給湯器と同様に構
成されており、本実施例が従来例と異なる特徴的なこと
は、制御装置20を図1のような構成として、給湯器の再
出湯待機中に再出湯待機時間の長短に対応させてバイパ
ス電磁弁15の切り換えを行うように構成したことであ
る。Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same reference numerals will be given to the same names as those in the conventional example, and the detailed description thereof will be omitted.
FIG. 1 is a block diagram of a control mechanism for controlling the bypass control valve by the operation method of the bypass control valve in the hot water supply standby for hot water supply according to the present invention. The water heater of the present embodiment has the same configuration as the conventional water heater shown in FIG. 6, and the characteristic of the present embodiment that is different from the conventional water heater is that the control device 20 is as shown in FIG. The configuration is such that the bypass solenoid valve 15 is switched according to the length of the hot-spring re-waiting time while the hot-water heater is waiting for the hot-water re-hot.
【0018】図1に示すように、制御装置20は、バイパ
ス電磁弁制御部39と燃焼運転制御部40を有しており、バ
イパス電磁弁制御部39は、高温・低温設定判定部30、バ
イパス電磁弁オン・オフ指令部31、バイパス電磁弁駆動
部32、待機時間計測タイマ33、メモリ部34を有し、燃焼
運転制御部40は、燃焼能力演算部35、比例弁操作量演算
部36、比例弁駆動部37、温度偏差検出部38を有して構成
されている。As shown in FIG. 1, the control device 20 has a bypass solenoid valve control section 39 and a combustion operation control section 40. The bypass solenoid valve control section 39 includes a high temperature / low temperature setting determination section 30 and a bypass. It has a solenoid valve on / off command unit 31, a bypass solenoid valve drive unit 32, a standby time measurement timer 33, a memory unit 34, the combustion operation control unit 40, a combustion capacity calculation unit 35, a proportional valve operation amount calculation unit 36, It is configured to have a proportional valve drive unit 37 and a temperature deviation detection unit 38.
【0019】高温・低温設定判定部30は、リモコン1の
温度設定部29に入力されている給湯の設定温度が、高温
設定であるか低温設定であるかを判断するものであり、
温度設定部29からの信号を受けて、例えば、設定温度が
60℃または70℃の場合には設定温度が高温設定であると
判断し、設定温度が、例えば、36℃〜48℃であるときに
は設定温度が低温設定であると判断し、これらの判断結
果をバイパス電磁弁オン・オフ指令部31に加える。The high temperature / low temperature setting determination unit 30 determines whether the set temperature of the hot water supplied to the temperature setting unit 29 of the remote controller 1 is the high temperature setting or the low temperature setting.
In response to a signal from the temperature setting unit 29, for example, the set temperature
If it is 60 ℃ or 70 ℃, it is judged that the set temperature is the high temperature setting, and if the set temperature is, for example, 36 ℃ to 48 ℃, it is judged that the set temperature is the low temperature setting. Added to the bypass solenoid valve on / off command section 31.
【0020】また、待機時間計測タイマ33は、給湯が一
旦停止されてから再出湯が行われるまでの待機時間を計
測するものであり、流量センサ9からの信号を受けて、
給湯が一旦停止して流量センサ9で検出される検出信号
がオフとなり、その後、再び流量センサ9がオンとなる
までの時間を待機時間として計測し、待機時間を逐次バ
イパス電磁弁オン・オフ指令部31に加える。The waiting time measuring timer 33 measures the waiting time from when the hot water supply is once stopped until the hot water is discharged again, and receives a signal from the flow rate sensor 9,
After the hot water supply is stopped once, the detection signal detected by the flow rate sensor 9 is turned off, and then the time until the flow rate sensor 9 is turned on again is measured as the standby time, and the standby time is sequentially commanded to bypass the solenoid valve. Add to part 31.
【0021】バイパス電磁弁オン・オフ指令部31は、前
記高温・低温設定判定部30からの信号と待機時間計測タ
イマ33からの信号を受けて、バイパス電磁弁15のオン・
オフ信号をバイパス電磁弁駆動部32に加えるものであ
り、高温・低温設定判定部30により、給湯の設定温度が
高温設定であると判断されたときには、バイパス電磁弁
15オフの指令信号をバイパス電磁弁駆動部32に加える。
また、バイパス電磁弁オン・オフ指令部31は比較回路を
有しており、高温・低温設定判定部30により、給湯の設
定温度が低温設定であると判断されたときには、まず、
待機時間計測タイマ33により計測される待機時間とメモ
リ部34に予め入力されている弁切り換え時間とを比較す
る。The bypass solenoid valve on / off command section 31 receives the signal from the high temperature / low temperature setting determination section 30 and the signal from the standby time measuring timer 33, and turns on / off the bypass solenoid valve 15.
An off signal is added to the bypass solenoid valve drive unit 32, and when the high temperature / low temperature setting determination unit 30 determines that the set temperature of hot water is the high temperature setting, the bypass solenoid valve is operated.
A 15-off command signal is applied to the bypass solenoid valve drive unit 32.
Further, the bypass solenoid valve on / off command unit 31 has a comparison circuit, and when the high temperature / low temperature setting determination unit 30 determines that the set temperature of hot water supply is the low temperature setting, first,
The standby time measured by the standby time measurement timer 33 is compared with the valve switching time input in advance in the memory unit 34.
【0022】なお、弁切り換え時間は、予め実験等によ
り求められるものであり、給湯器ごとに個別に設計され
ている熱交換器2の保有熱量や、出湯温度と熱交換器2
内の湯温との差、熱交換器2の出口側からミキシング部
19までの給湯管11の長さ等によって給湯燃焼停止時から
再出湯までの待機時間に、熱交換器2内の湯温や、熱交
換器2の出口側からミキシング部19までの給湯管11内の
湯温がどれくらい冷めてしまうかということが異なり、
さらに、給湯器の周囲温度、給湯燃焼を停止するまでの
燃焼状態(設定温度を何度とし、どのくらいの間燃焼さ
せたのか)等によっても給湯管11内の湯温の下がり方が
異なるために、例えば、給湯器の燃焼動作を行う前に同
じ機種の給湯器を用いて、同じような環境(周囲温度)
のもとに燃焼動作を行い、その後、給湯燃焼停止時から
一定の時間ごとに再出湯を行い、そのような湯温の検出
を何度か繰り返し、どのような条件(環境、給湯器の機
種等)のときにどのくらいの待機時間が経てば熱交換器
2内の湯温等がどれだけ冷えるかを表やグラフ等の様々
なデータとして求め、それにより、給湯燃焼停止以降の
再出湯開始時にオーバーシュートの湯が出るまでの時間
とアンダーシュートの湯が出るまでの時間の境界周辺の
時間を求めて、弁切り換え時間として設定されるもので
ある。Note that the valve switching time is obtained in advance by experiments or the like, and the amount of heat possessed by the heat exchanger 2, which is individually designed for each water heater, the outlet temperature and the heat exchanger 2
The difference from the temperature of the hot water inside, the mixing part from the outlet side of the heat exchanger 2
Depending on the length of the hot water supply pipe 11 up to 19, the hot water temperature in the heat exchanger 2 and the hot water supply pipe 11 from the outlet side of the heat exchanger 2 to the mixing unit 19 during the waiting time from the stop of hot water supply combustion to the re-emergence of hot water. It is different how much the hot water inside gets cooled,
In addition, the way the temperature of the hot water falls in the hot water supply pipe 11 varies depending on the ambient temperature of the water heater, the combustion state until the hot water combustion is stopped (how many times the set temperature is set, and how long the hot water is burned). , For example, using the same type of water heater before performing the combustion operation of the water heater, the same environment (ambient temperature)
The combustion operation is performed under the condition that the hot water supply is restarted and the hot water is discharged again at regular intervals, and such hot water temperature detection is repeated several times to determine what conditions (environment, water heater model Etc.) how much waiting time elapses before the hot water temperature in the heat exchanger 2 cools down as various data such as tables and graphs. The time around the boundary between the time until hot water for overshoot and the time for hot water for undershoot is obtained, and is set as the valve switching time.
【0023】また、上記のような実験を行う代わりに、
前記熱交換器2の保有熱量等の様々な値から、理論計算
により給湯燃焼停止時以降の再出湯開始時に、オーバー
シュートの湯が出るまでの時間とアンダーシュートの湯
が出るまでの時間を演算し、その演算値から両者の境界
周辺の時間を弁切り換え時間として設定することもあ
る。Further, instead of conducting the above experiment,
From various values such as the amount of heat possessed by the heat exchanger 2, the time until the overshoot hot water comes out and the time until the undershoot hot water comes out are calculated by the theoretical calculation at the time of re-hot spring start after the hot water supply combustion stop However, the time around the boundary between the two may be set as the valve switching time from the calculated value.
【0024】バイパス電磁弁オン・オフ指令部31は、上
記のようにして求められ、メモリ部34に入力されている
弁切り換え時間と待機時間計測タイマ33から加えられる
待機時間の信号とを比較して、待機時間が弁切り換え時
間に達するまでは、バイパス電磁弁15を開の状態にして
待機するように、バイパス電磁弁オン信号をバイパス電
磁弁駆動部32に加え、待機時間計測タイマ33で計測した
待機時間が弁切り換え時間に達した以降は、バイパス電
磁弁15を閉状態にして再出湯に備えて待機するように、
バイパス電磁弁オフ信号をバイパス電磁弁駆動部32に加
える。The bypass solenoid valve on / off command section 31 compares the valve switching time, which is obtained as described above and is input to the memory section 34, with the standby time signal added from the standby time measuring timer 33. Then, until the standby time reaches the valve switching time, the bypass solenoid valve 15 is opened and the standby time is measured by the standby time measurement timer 33 so that the bypass solenoid valve ON signal is added to the bypass solenoid valve drive unit 32. After the standby time reaches the valve switching time, the bypass solenoid valve 15 is closed to wait for re-hot water,
A bypass solenoid valve OFF signal is applied to the bypass solenoid valve drive unit 32.
【0025】バイパス電磁弁駆動部32は、バイパス電磁
弁オン・オフ指令部31からの信号を受けて、バイパス電
磁弁15の駆動を制御するものであり、バイパス電磁弁オ
ン・オフ指令部31からバイパス電磁弁オン信号がバイパ
ス電磁弁駆動部32に加えられたときには、バイパス電磁
弁15をオン(開の状態)に駆動し、バイパス電磁弁オン
・オフ指令部31からバイパス電磁弁オフ信号がバイパス
電磁弁駆動部32に加えられたときには、バイパス電磁弁
15をオフ(閉状態)に駆動するものである。The bypass solenoid valve drive unit 32 receives the signal from the bypass solenoid valve on / off command unit 31 and controls the drive of the bypass solenoid valve 15. When the bypass solenoid valve ON signal is applied to the bypass solenoid valve drive unit 32, the bypass solenoid valve 15 is driven to the ON state (open state), and the bypass solenoid valve ON / OFF command unit 31 bypasses the bypass solenoid valve OFF signal. When added to solenoid valve drive 32, bypass solenoid valve
It drives 15 off (closed state).
【0026】燃焼能力演算部35は、演算回路を有してお
り、給湯器の燃焼能力を演算回路により演算するように
なっており、リモコン21の温度設定部29の設定温度信号
と、流量センサ9で検出される流量検出信号と、入水温
度センサ18で検出される入水温度検出信号が、常に燃焼
能力演算部35に加えられている。The combustion capacity calculation unit 35 has a calculation circuit for calculating the combustion capacity of the water heater by the calculation circuit, and sets the temperature signal of the temperature setting unit 29 of the remote controller 21 and the flow rate sensor. The flow rate detection signal detected at 9 and the incoming water temperature detection signal detected by the incoming water temperature sensor 18 are constantly added to the combustion capacity calculation unit 35.
【0027】温度偏差検出部38は、比較回路と演算回路
を有しており、温度設定部29に入力されている設定温度
と出湯温度センサ16で検出される出湯温度検出信号とを
比較して、出湯温度と設定温度との温度偏差を検出する
ものであり、出湯温度と設定温度の温度偏差の検出信号
を前記燃焼能力演算部35に加える。そして、燃焼能力演
算部35は、前記温度設定部29、流量センサ9、入水温度
センサ18からの信号と温度偏差検出部38からの信号とを
受けて、前記演算回路により給湯器の燃焼能力を演算
し、演算結果を比例弁操作量演算部36に加える。The temperature deviation detection unit 38 has a comparison circuit and an arithmetic circuit, and compares the set temperature input to the temperature setting unit 29 with the hot water temperature detection signal detected by the hot water temperature sensor 16. The temperature deviation between the tapping temperature and the set temperature is detected, and a detection signal of the temperature deviation between the tapping temperature and the set temperature is added to the combustion capacity calculation unit 35. Then, the combustion capacity calculation unit 35 receives the signals from the temperature setting unit 29, the flow rate sensor 9, the incoming water temperature sensor 18 and the signal from the temperature deviation detection unit 38, and calculates the combustion capacity of the water heater by the calculation circuit. Calculation is performed, and the calculation result is added to the proportional valve operation amount calculation unit 36.
【0028】比例弁操作量演算部36は演算回路を有して
おり、燃焼能力演算部35からの給湯器の燃焼能力の演算
結果を受けて、ガスの比例弁8の操作量を演算回路によ
り演算し、演算結果を比例弁駆動部37に加える。The proportional valve operation amount calculation unit 36 has an operation circuit, and receives the operation result of the combustion capacity of the water heater from the combustion capacity operation unit 35, the operation amount of the proportional valve 8 of gas is calculated by the operation circuit. Calculation is performed and the calculation result is added to the proportional valve drive unit 37.
【0029】比例弁駆動部37は、比例弁操作量演算部36
からの演算結果を受けて、ガスの比例弁8の駆動制御を
行うものであり、比例弁操作量演算部36により求められ
た操作量だけ比例弁8を開閉し、それにより、給湯器の
燃焼を制御し、出湯温度が設定温度にほぼ等しくなるよ
うにするものである。The proportional valve drive unit 37 includes a proportional valve operation amount calculation unit 36.
The proportional valve 8 is controlled to be driven by the gas in response to the calculation result from the control valve, and the proportional valve 8 is opened and closed by the operation amount obtained by the proportional valve operation amount calculation unit 36, whereby the combustion of the water heater is performed. Is controlled so that the hot water outlet temperature is substantially equal to the set temperature.
【0030】本実施例は、以上のように構成されてお
り、次にその動作について図2のフローチャートと図1
に基づいて具体的に説明する。まず、ステップ101 でリ
モコン21をオンとし、給湯器の燃焼動作が行われる状態
とし、ステップ102 で流量センサ9がオンかどうかを判
断し、流量センサ9がオンの状態のときには、ステップ
103 で燃焼動作を開始する。次に、ステップ104 で高温
・低温設定判定部30により、リモコン21の設定温度が高
温設定であるか低温設定であるかを判断し、バイパス電
磁弁オン・オフ指令部31に判断信号を加え、設定温度が
高温設定であると判断されたときには、ステップ105 で
バイパス電磁弁駆動部32によりバイパス電磁弁15をオフ
とし、ステップ104 でリモコン21の設定温度が低温設定
であると判断されたときには、ステップ106 でバイパス
電磁弁駆動部32によりバイパス電磁弁15をオンとする。The present embodiment is configured as described above, and its operation will be described below with reference to the flow chart of FIG. 2 and FIG.
It will be specifically described based on. First, in step 101, the remote controller 21 is turned on so that the combustion operation of the water heater is performed. In step 102, it is determined whether the flow rate sensor 9 is on. If the flow rate sensor 9 is on, step
At 103, the combustion operation starts. Next, in step 104, the high temperature / low temperature setting determination unit 30 determines whether the set temperature of the remote controller 21 is the high temperature setting or the low temperature setting, and adds a determination signal to the bypass solenoid valve on / off command unit 31, When it is determined that the set temperature is the high temperature setting, the bypass solenoid valve driving unit 32 turns off the bypass solenoid valve 15 in step 105, and when it is determined in step 104 that the set temperature of the remote controller 21 is the low temperature setting, In step 106, the bypass solenoid valve drive unit 32 turns on the bypass solenoid valve 15.
【0031】次に、ステップ107 で、燃焼運転制御部40
の温度偏差検出部38により、設定温度と出湯温度がほぼ
等しいかどうかを判断し、設定温度と出湯温度がほぼ等
しくなるように給湯器の燃焼制御を行いながら燃焼運転
を続行し、ステップ109 に進む。Next, in step 107, the combustion operation control unit 40
The temperature deviation detection unit 38 determines whether or not the set temperature and the hot water temperature are substantially equal to each other, and continues the combustion operation while performing the combustion control of the water heater so that the set temperature and the hot water temperature are approximately equal to each other. move on.
【0032】次に、ステップ109 で流量センサ9がオフ
かどうかを判断し、流量センサ9がオンのときには給湯
器の燃焼運転が継続されているため、ステップ104 に戻
り、ステップ104 からステップ109 を繰り返し、給湯器
の燃焼動作を継続する。そして、ステップ109 で流量セ
ンサ9がオフであると判断されたときには、ステップ11
0 で給湯器の燃焼動作を停止させる。Next, in step 109, it is judged whether or not the flow sensor 9 is off. When the flow sensor 9 is on, the combustion operation of the water heater is continued, so the process returns to step 104, and steps 104 to 109 are executed. Repeatedly, the burning operation of the water heater is continued. When it is determined in step 109 that the flow sensor 9 is off, step 11
At 0, stop the combustion operation of the water heater.
【0033】そして、ステップ111 でメモリ部34にバイ
パス電磁弁オフ時間(弁切り換え時間)をセットし、ス
テップ112 で待機時間計測タイマ33をスタートさせる。
次に、ステップ113 でバイパス電磁弁15がオンがどうか
を判断し、バイパス電磁弁15がオンのときにはステップ
114 で、バイパス電磁弁オン・オフ指令部31により、メ
モリ部34に予め入力した弁切り換え時間と待機時間計測
タイマ33により計測される待機時間とを比較して、待機
時間が弁切り換え時間に達してしないときには、バイパ
ス電磁弁15をオンのまま(開状態にして)給湯器の再出
湯に備えて待機させ、待機時間計測タイマ33で計測され
る待機時間が弁切り換え時間に達したときには、ステッ
プ115 でバイパス電磁弁15をオフ(閉状態)にして給湯
器の再出湯に備えて待機させる。なお、ステップ113 で
バイパス電磁弁15がオフと判断されたとき、すなわち、
給湯器の設定温度が高温設定のときには、バイパス電磁
弁15はそのままオフ状態のまま待機し、ステップ116 に
進む。Then, in step 111, the bypass solenoid valve off time (valve switching time) is set in the memory section 34, and in step 112 the standby time measuring timer 33 is started.
Next, in step 113, determine whether the bypass solenoid valve 15 is on, and if the bypass solenoid valve 15 is on, step
At 114, the bypass solenoid valve on / off command unit 31 compares the valve switching time previously input to the memory unit 34 with the standby time measured by the standby time measuring timer 33, and the standby time reaches the valve switching time. If not, the bypass solenoid valve 15 is kept on (opened) in preparation for hot water supply again, and when the standby time measured by the standby time measurement timer 33 reaches the valve switching time, the step At 115, the bypass solenoid valve 15 is turned off (closed), and the hot water supply device is put on standby in preparation for re-hot water. When it is determined in step 113 that the bypass solenoid valve 15 is off, that is,
When the set temperature of the water heater is set to a high temperature, the bypass solenoid valve 15 remains in the OFF state and stands by, and the routine proceeds to step 116.
【0034】そして、ステップ116 で流量センサ9がオ
ンとなり再出湯が行われたときには、ステップ102 に戻
って給湯器の燃焼動作を継続し、ステップ116 で流量セ
ンサ9がオンとならずに給湯器の再出湯が行われないと
きには、ステップ113 に戻って給湯器の再出湯が行われ
るまで、ステップ113 からステップ115 の動作を行い、
給湯器の再出湯に備えて待機する。When the flow sensor 9 is turned on in step 116 and hot water is again discharged, the process returns to step 102 to continue the combustion operation of the water heater, and the flow sensor 9 is not turned on in step 116 and the water heater is not turned on. If the hot water is not re-emerged in step 113, return to step 113 and perform the operations from step 113 to step 115 until the hot water is re-emerged in the water heater.
Wait for the hot water heater to return to hot water.
【0035】すなわち、ステップ114 で、待機時間計測
タイマ33により計測された待機時間が弁切り換え時間を
経過していないと判断されたときには、図3の(a)に
示すように、給湯器の燃焼停止時(図のAに示す時間)
から再出湯が行われて再び燃焼動作が行われる時間(図
のBに示す時間)までの待機時間が短く、再出湯により
給湯器の燃焼動作が開始される図のBに示した時間が、
図のCに示した弁切り換え時間に達していないために、
バイパス電磁弁15はオンのままの状態が継続される。That is, when it is determined in step 114 that the standby time measured by the standby time measuring timer 33 has not elapsed the valve switching time, as shown in FIG. When stopped (time indicated by A in the figure)
The waiting time from when the hot water is re-extracted to the time when the combustion operation is performed again (the time shown in B in the figure) is short, and the time shown in B of the figure when the hot water heater starts the combustion operation by re-hot water is
Since the valve switching time shown in C of the figure has not been reached,
The bypass solenoid valve 15 continues to be in the ON state.
【0036】そして、ステップ114 で、待機時間計測タ
イマ33により計測された待機時間が弁切り換え時間に達
したと判断されたときには、図3の(b)に示すよう
に、図のAに示した給湯燃焼停止時から再出湯が行われ
て燃焼動作が開始される図のBに示した時間までの待機
時間が長く、図のCに示した弁切り換え時間を経過して
いるために、図のCに示した弁切り換え時間に達した時
点でバイパス電磁弁15がオフの状態となり、その状態で
再出湯開始時まで待機され、再出湯による燃焼動作開始
により、再びバイパス電磁弁15がオンとなるようになっ
ている。なお、バイパス電磁弁15がオフの状態からオン
の状態に切り換わるときには、給湯器の燃焼動作が開始
されると同時にバイパス電磁弁15をオンさせようとして
もオン流量の検出遅れやバイパス電磁弁の入力的な作動
遅れ等により若干の遅れが生じる。Then, when it is determined in step 114 that the standby time measured by the standby time measuring timer 33 has reached the valve switching time, as shown in FIG. Since the waiting time from the time when hot water supply combustion is stopped to the time when the hot water is discharged again and the combustion operation is started is shown in B of the figure, and the valve switching time shown in C of the figure has elapsed, When the valve switching time shown in C is reached, the bypass solenoid valve 15 is turned off, and in that state, the bypass solenoid valve 15 is turned on again due to the start of the re-leaving hot water and the start of the combustion operation. It is like this. When the bypass solenoid valve 15 is switched from the off state to the on state, even if the bypass solenoid valve 15 is turned on at the same time when the combustion operation of the water heater is started, the detection delay of the on-flow rate and the bypass solenoid valve There will be some delay due to input operation delay.
【0037】本実施例によれば、上記のようにして、制
御装置20の燃焼運転制御部40により給湯器の燃焼運転が
制御され、バイパス電磁弁制御部39により、給湯燃焼の
停止時から給湯燃焼停止の経過時間を計測し、給湯燃焼
停止時から前記弁切り換え時間に達するまでは、バイパ
ス電磁弁15を開の状態にして給湯器の再出湯に備えて待
機するために、前回の燃焼動作により暖められた熱い湯
が冷めていないときには、その熱い湯とバイパス流路4
からの水が合流混合して給湯管11から出湯され、給湯管
11からはオーバーシュートの湯が出ることはなく、設定
温度に近い湯温の湯が出湯される。According to this embodiment, as described above, the combustion operation control unit 40 of the control device 20 controls the combustion operation of the water heater, and the bypass solenoid valve control unit 39 controls the hot water supply from the time when the hot water combustion is stopped. The elapsed time of combustion stop is measured, and from the time when hot water supply combustion is stopped to the time when the valve switching time is reached, the bypass solenoid valve 15 is kept in an open state to wait for the hot water heater to return hot water. When the hot water warmed by is not cold, the hot water and the bypass passage 4
From the hot water supply pipe 11
From 11, no overshoot of hot water comes out, and hot water with a temperature close to the set temperature comes out.
【0038】また、給湯燃焼停止の経過時間が弁切り換
え時間に達した以降は、バイパス電磁弁15を閉状態にし
て給湯器の再出湯に備えて待機するために、前回の給湯
燃焼停止時から長い時間が経過し、前回の燃焼動作によ
り暖められた湯が冷めてしまったときには、バイパス流
路4のバイパス電磁弁15は閉状態となっており、バイパ
ス流路4からの水が給湯管11を通る湯に合流混合するこ
とはなく、給湯管11を通る水がバイパス流路4からの水
によりさらに冷やされることはなく、できるだけ設定温
度に近い湯温の湯が給湯管11から出湯され、給湯管11か
らアンダーシュートの湯が出湯されることが抑制され
る。Further, after the elapsed time of hot water supply combustion stop reaches the valve switching time, the bypass solenoid valve 15 is closed and in order to wait for the hot water supply of the hot water supply again, the hot water supply combustion is stopped from the previous time. When a long time has passed and the hot water warmed by the previous combustion operation has cooled, the bypass solenoid valve 15 of the bypass flow passage 4 is in the closed state, and the water from the bypass flow passage 4 is supplied to the hot water supply pipe 11 There is no confluent mixing with the hot water passing through the water, the water passing through the hot water supply pipe 11 is not further cooled by the water from the bypass flow path 4, and hot water having a hot water temperature as close to the set temperature as possible is discharged from the hot water supply pipe 11. The undershoot hot water is prevented from being discharged from the hot water supply pipe 11.
【0039】また、本実施例では、バイパス電磁弁制御
部39に高温・低温設定判定部30が設けられており、リモ
コン21の温度設定部29に入力されている設定温度が高温
設定である場合には、バイパス流路4のバイパス電磁弁
15は閉じられた状態となっており、熱交換器2で加熱さ
れた湯は給湯管11のミキシング部19を通ってもバイパス
流路4からの水と合流混合することはなく、従来例のよ
うに、給湯器の燃焼動作が開始されるときには、必ずバ
イパス流路4のバイパス電磁弁15が開いてバイパス流路
4からの水が熱交換器2側からの湯に合流混合されると
いうことはないために、バイパス流路4からの水により
冷やされる分だけ熱交換器2側で加熱する湯の温度を高
くする必要はなく、過渡的な流量減少時などにおいて
も、熱交換器内を沸騰に至らしめる危険性を回避するこ
とができる。Further, in this embodiment, when the bypass solenoid valve control unit 39 is provided with the high temperature / low temperature setting determination unit 30 and the set temperature input to the temperature setting unit 29 of the remote controller 21 is the high temperature setting. Is a bypass solenoid valve of the bypass passage 4.
15 is in a closed state, and the hot water heated by the heat exchanger 2 does not merge and mix with the water from the bypass flow path 4 even if it passes through the mixing section 19 of the hot water supply pipe 11, As described above, when the combustion operation of the water heater is started, the bypass solenoid valve 15 of the bypass flow passage 4 is always opened so that the water from the bypass flow passage 4 joins and mixes with the hot water from the heat exchanger 2 side. Therefore, it is not necessary to raise the temperature of the hot water heated on the heat exchanger 2 side by the amount of being cooled by the water from the bypass flow path 4, and even when the flow rate is transiently reduced, The risk of boiling can be avoided.
【0040】なお、本発明は上記実施例に限定されるこ
とはなく、様々な実施の態様を採り得る。例えば、上記
実施例では、弁切り換え時間は、燃焼運転を開始する前
に予め実験などにより求めて設定し、その設定値を制御
装置20のメモリ部34に入力したが、弁切り換え時間は必
ずしも燃焼運転が開始される前に予め求めておいた値を
入力するとは限らず、図4に示すように、図2のフロー
チャートのステップ107 とステップ109 の間にステップ
117 の動作を加え、制御装置20の燃焼能力演算部35によ
り、給湯器の燃焼運転を停止させる前の前回の燃焼運転
中にどのくらいの熱量で燃焼を行っていたかどうかを演
算し、その演算結果をメモリ部34に加え、ステップ111
でバイパス電磁弁オン・オフ指令部31がメモリ部34に加
えられた前回燃焼の燃焼量の値に基づき、バイパス流路
4と給湯管11の断面積差や給湯器の外気温、入水温度な
どから弁切り換え時間を演算し、その演算値を弁切り換
え時間として設定しても構わない。The present invention is not limited to the above-mentioned embodiments, and various embodiments can be adopted. For example, in the above-described embodiment, the valve switching time is set by being obtained by experiments in advance before starting the combustion operation, and the set value is input to the memory unit 34 of the control device 20, but the valve switching time is not necessarily combustion. It is not always necessary to input the value obtained in advance before the operation is started, and as shown in FIG. 4, a step between steps 107 and 109 of the flowchart of FIG.
In addition to the operation of 117, the combustion capacity calculation unit 35 of the control device 20 calculates how much heat was being burned during the previous combustion operation before stopping the combustion operation of the water heater, and the calculation result To the memory section 34, and step 111
Based on the value of the combustion amount of the previous combustion added to the memory unit 34 by the bypass solenoid valve on / off command unit 31, the cross-sectional area difference between the bypass flow path 4 and the hot water supply pipe 11, the outside temperature of the water heater, the incoming water temperature, etc. It is also possible to calculate the valve switching time from, and set the calculated value as the valve switching time.
【0041】このように、給湯器の燃焼動作ごとにその
ときの給湯器の燃焼能力を演算し、熱交換器2の保有熱
量を求めて、この保有熱量に応じて弁切り換え時間を可
変制御するように構成すれば、給湯燃焼停止時からどの
くらいの時間が経てば熱交換器2から給湯管11側に送り
込まれる湯の温度がどのくらい下がるかといった湯温の
下がり具合により、弁切り換え時間をその都度設定する
ことになるために、再出湯の際に、より設定温度に近い
湯温の湯を出湯させることが可能となる。In this way, the combustion capacity of the water heater at that time is calculated for each combustion operation of the water heater, the amount of heat retained in the heat exchanger 2 is determined, and the valve switching time is variably controlled according to this amount of retained heat. With this configuration, the valve switching time is changed each time depending on how much time elapses after the hot water supply is stopped and the temperature of the hot water sent from the heat exchanger 2 to the hot water supply pipe 11 decreases. Since the hot water is set, hot water having a hot water temperature closer to the set temperature can be discharged when the hot water is again discharged.
【0042】また、上記実施例では、制御装置20の高温
・低温設定判定部30は、給湯の設定温度が60℃または70
℃のときは高温設定であると判断し、設定温度が36〜48
℃のときには低温設定であると判断したが、高温・低温
設定判定部30は、必ずしも設定温度が60℃または70℃の
ときに高温設定であると判断し、設定温度が36〜48℃の
ときに低温設定であると判断するとは限らず、設定温度
が高温設定であると判断する値や低温設定であると判断
する値は特に限定されるものではない。Further, in the above embodiment, the high temperature / low temperature setting determination unit 30 of the controller 20 sets the hot water supply temperature to 60 ° C. or 70 ° C.
When it is ℃, it is judged that it is a high temperature setting and the set temperature is 36 to 48
When it was ℃, it was judged to be the low temperature setting, but the high temperature / low temperature setting judgment unit 30 judged that it was always the high temperature setting when the setting temperature was 60 ° C or 70 ° C, and when the setting temperature was 36 to 48 ° C. It is not always determined that the set temperature is the low temperature setting, and the value that the set temperature is determined to be the high temperature setting and the value that is determined to be the low temperature setting are not particularly limited.
【0043】さらに、高温・低温設定判定部30は制御装
置20に必ず設けるとは限らず、制御装置20は高温・低温
設定判定部30を設けない構成とし、給湯の設定温度が如
何なる値のときにも、上記実施例と同様に、バイパス電
磁弁制御部39によるバイパス電磁弁の制御を行うように
しても構わない。Furthermore, the high temperature / low temperature setting determination unit 30 is not necessarily provided in the control device 20, and the control device 20 is configured not to have the high temperature / low temperature setting determination unit 30 and when the set temperature of hot water supply is any value. However, the bypass solenoid valve may be controlled by the bypass solenoid valve control unit 39 as in the above embodiment.
【0044】[0044]
【発明の効果】本発明によれば、給湯燃焼の停止以降の
再出湯開始時にオーバーシュートの湯が出る給湯燃焼停
止時からの経過時間とアンダーシュートの湯が出る給湯
燃焼停止時からの経過時間の境界周辺の時間を弁切り換
え時間として設定し、給湯燃焼の停止時から給湯燃焼停
止の経過時間を計測し、給湯燃焼停止時から前記弁切り
換え時間に達するまではバイパス制御弁を開の状態にし
て再出湯に備えて待機させるために、給湯燃焼の停止時
から給湯燃焼の経過時間が弁切り換え時間に達しないオ
ーバーシュートの湯が出ると予測される短い時間のとき
には、バイパス制御弁が開の状態のままとなっており、
熱交換器側からの熱めの湯にバイパス流路からの水が合
流混合し、出湯路の先端側からはオーバーシュートの湯
が出ることなく、設定温度に近い湯温の湯が出湯され
る。EFFECT OF THE INVENTION According to the present invention, the elapsed time from the hot water supply combustion stop in which overshoot hot water comes out and the hot water supply combustion stop from which undershoot hot water comes out at the time of restarting hot water discharge after the stop of hot water supply combustion The time around the boundary of is set as the valve switching time, the elapsed time from the hot water supply combustion stop to the hot water supply combustion stop is measured, and the bypass control valve is opened from the hot water supply combustion stop until the valve switching time is reached. In order to wait for hot water supply again, the bypass control valve is opened when the elapsed time of hot water supply combustion is short enough that the overshoot of hot water does not reach the valve switching time. It remains in the state,
The hot water from the heat exchanger is mixed with the water from the bypass channel, and the hot water near the set temperature is discharged from the tip side of the hot water outlet without overshooting hot water. .
【0045】また、給湯燃焼の停止時から給湯燃焼停止
の経過時間が弁切り換え時間に達した以降は、バイパス
制御弁を閉状態にして再出湯に備えて待機するために、
弁切り換え時間経過後に出湯路の湯温が下がったときに
は、バイパス流路からの水が出湯路の湯に混合されるこ
とはなく、従来のように、出湯路の湯温が下がっている
にも拘わらず、さらに、その湯にバイパス流路からの水
を混合して、より冷たい湯を出湯させることはなく、ア
ンダーシュートの湯が出湯されることが抑制され、でき
るだけ設定温度に近い湯温の湯を出湯することができ
る。Further, after the elapsed time from the stop of hot water supply combustion to the stop of hot water supply combustion reaches the valve switching time, the bypass control valve is closed to stand by in preparation for hot water discharge again.
When the hot water temperature in the hot water outlet falls after the valve switching time has elapsed, the water from the bypass hot water flow path is not mixed with the hot water in the hot water hot water outlet. Regardless, the water from the bypass flow path is not mixed with the hot water, and the colder hot water is not discharged. You can pour hot water.
【0046】さらに、給湯の設定温度が高温設定である
か低温設定であるかを判断し、低温設定であるときに上
記バイパス制御弁の動作方法を行うようにした場合に
は、上記バイパス制御弁の動作は低温設定のときのみ行
われ、給湯の設定温度が高温設定であるときには熱交換
器側からの湯にバイパス流路からの水を混合させること
はなく、バイパス流路からの水により温度が下げられる
分だけ、熱交換器により加熱される湯の温度を高く設定
することが必要ないために、過渡的な流量減少時などに
おいても、熱交換器内を沸騰に至らしめる危険性を回避
することができ、安全な給湯が可能となる。Further, when it is judged whether the set temperature of the hot water supply is the high temperature setting or the low temperature setting and the operation method of the bypass control valve is carried out when it is the low temperature setting, the bypass control valve is operated. The operation of is only performed at low temperature setting, and when the set temperature of hot water supply is high temperature, the hot water from the heat exchanger side is not mixed with the water from the bypass flow passage, Since it is not necessary to set the temperature of the hot water heated by the heat exchanger to a high level as much as it is lowered, the risk of boiling inside the heat exchanger is avoided even when the flow rate is transiently reduced. It is possible to supply hot water safely.
【図1】本発明に係わる給湯器の再出湯待機中における
バイパス制御弁の動作方法により動作を行う制御機構を
示すブロック構成図である。FIG. 1 is a block configuration diagram showing a control mechanism that operates according to an operation method of a bypass control valve while the hot water supply device according to the present invention is on standby for re-hot water discharge.
【図2】図1に示した制御機構により行われる給湯器の
燃焼動作および再出湯待機中におけるバイパス制御弁の
制御動作を示すフローチャートである。FIG. 2 is a flowchart showing a combustion operation of a water heater and a control operation of a bypass control valve during standby for re-leaving hot water performed by the control mechanism shown in FIG.
【図3】給湯器の再出湯待機時間の違いによるバイパス
電磁弁の動作の違いを示す説明図である。FIG. 3 is an explanatory diagram showing a difference in operation of a bypass solenoid valve due to a difference in re-hot water waiting time of the water heater.
【図4】給湯器の再出湯待機中におけるバイパス制御弁
の動作方法の他の実施例を示すフローチャートである。FIG. 4 is a flowchart showing another embodiment of the method for operating the bypass control valve during the hot water supply standby for hot water re-emergence.
【図5】給湯器の再出湯待機中における給湯管11や熱交
換器2内の湯温の説明図である。FIG. 5 is an explanatory diagram of hot water temperature in the hot water supply pipe 11 and the heat exchanger 2 while the hot water supply device is on standby for re-emergence.
【図6】バイパスミキシング方式の給湯器の説明図であ
る。FIG. 6 is an explanatory diagram of a bypass mixing type water heater.
2 熱交換器 4 バイパス流路 9 流量センサ 11 給湯管 15 バイパス電磁弁 30 高温・低温設定判定部 31 バイパス電磁弁オン・オフ指令部 33 待機時間計測タイマ 39 バイパス電磁弁制御部 2 Heat exchanger 4 Bypass flow path 9 Flow rate sensor 11 Hot water supply pipe 15 Bypass solenoid valve 30 High / low temperature setting judgment unit 31 Bypass solenoid valve on / off command unit 33 Standby time measurement timer 39 Bypass solenoid valve control unit
Claims (2)
連通して熱交換器を迂回するバイパス流路を設け、この
バイパス流路に流路の開閉を行うバイパス制御弁を設け
てなる給湯器の再出湯待機中におけるバイパス制御弁の
動作方法において、給湯燃焼の停止以降の再出湯開始時
にオーバーシュートの湯が出る給湯燃焼停止時からの経
過時間とアンダーシュートの湯が出る給湯燃焼停止時か
らの経過時間の境界周辺の時間を弁切り換え時間として
設定し、給湯燃焼の停止時から給湯燃焼停止の経過時間
を計測し、給湯燃焼停止時から前記弁切り換え時間に達
するまではバイパス制御弁を開の状態にして再出湯に備
えて待機させ、弁切り換え時間に達した以降はバイパス
制御弁を閉状態にして再出湯に備えて待機する給湯器の
再出湯待機中におけるバイパス制御弁の動作方法。1. A bypass flow path that bypasses the heat exchanger by connecting the inlet and outlet channels of the heat exchanger of the water heater, and a bypass control valve that opens and closes the flow path is provided in the bypass flow path. In the operation method of the bypass control valve while waiting for re-emergence of the water heater, the overshoot of hot water is generated at the start of re-emergence after the stop of hot water combustion. By setting the time around the boundary of the elapsed time from the combustion stop as the valve switching time, measuring the elapsed time from the hot water supply combustion stop to the hot water supply combustion stop, and bypassing from the hot water supply combustion stop to the valve switching time Open the control valve and wait for re-hot water.After the valve switching time, close the bypass control valve and wait for re-hot water. Bypass control valve operating method.
設定であるかを判断し、低温設定であるときに請求項1
記載のバイパス制御弁の動作方法を行う給湯器の再出湯
待機中におけるバイパス制御弁の動作方法。2. The method according to claim 1, wherein it is judged whether the set temperature of the hot water supply is a high temperature setting or a low temperature setting, and when it is the low temperature setting.
A method for operating the bypass control valve during standby for re-emergence of a water heater, which performs the method for operating the bypass control valve as described.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34501693A JP3382691B2 (en) | 1993-12-20 | 1993-12-20 | Operation method of bypass control valve during hot water supply standby |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP34501693A JP3382691B2 (en) | 1993-12-20 | 1993-12-20 | Operation method of bypass control valve during hot water supply standby |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07174408A true JPH07174408A (en) | 1995-07-14 |
JP3382691B2 JP3382691B2 (en) | 2003-03-04 |
Family
ID=18373719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP34501693A Expired - Fee Related JP3382691B2 (en) | 1993-12-20 | 1993-12-20 | Operation method of bypass control valve during hot water supply standby |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3382691B2 (en) |
-
1993
- 1993-12-20 JP JP34501693A patent/JP3382691B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3382691B2 (en) | 2003-03-04 |
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