JP3144605B2 - Circulating water heater - Google Patents
Circulating water heaterInfo
- Publication number
- JP3144605B2 JP3144605B2 JP03839793A JP3839793A JP3144605B2 JP 3144605 B2 JP3144605 B2 JP 3144605B2 JP 03839793 A JP03839793 A JP 03839793A JP 3839793 A JP3839793 A JP 3839793A JP 3144605 B2 JP3144605 B2 JP 3144605B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- heating
- supply pipe
- 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 - Fee Related
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は給湯停止状態に循環保
温を行うバイパス付きの循環式給湯装置に係り、特に給
湯停止状態に加熱部を適切に加熱制御して循環経路内の
湯水を所定の温度に保つ循環式給湯装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulation type hot water supply apparatus with a bypass for keeping a circulation heat when a hot water supply is stopped. The present invention relates to a circulation type hot water supply device for maintaining a temperature.
【０００２】[0002]
【従来の技術】給湯機の熱交換器の給水側から分岐され
たバイパス管と熱交換器の出湯側に設けられた出湯管を
湯水混合弁で接続したバイパス付き給湯機は知られてい
る。このようなバイパス付き給湯機は、熱交換器で充分
に加熱され出湯管を通過する高温の湯とバイパス管を通
過する水とを湯水混合弁で混合し、設定温度の湯水が得
られるように構成されている。2. Description of the Related Art There is known a water heater with a bypass in which a bypass pipe branched from a water supply side of a heat exchanger of a water heater and a tapping pipe provided on a tapping side of the heat exchanger are connected by a hot water mixing valve. Such a hot water supply device with a bypass mixes a high-temperature hot water that is sufficiently heated by a heat exchanger and passes through a tapping pipe and water that passes through a bypass pipe with a hot-water mixing valve so that hot water at a set temperature can be obtained. It is configured.
【０００３】よって、バイパス付き給湯機は、熱交換器
自体を高温に保つことができるため、バイパスなしの給
湯機に比べ、給湯から所望の温度の湯水が供給されるま
での湯温立上がり時間が短いという特徴がある。[0003] Therefore, a hot water supply device with a bypass can keep the heat exchanger itself at a high temperature, so that the rise time of hot water from supply of hot water to supply of hot water of a desired temperature is higher than that of a hot water supply device without a bypass. It has the characteristic of being short.
【０００４】また、給湯管の末端部と給水管を戻り管で
結合して給湯管―戻り管―給水管―熱交換器―給湯管の
経路で循環経路を構成するとともに、循環経路内に循環
ポンプを設けて循環経路内の湯水を循環させ、給湯停止
時には間欠燃焼制御により循環経路内の湯水を所望の温
度に保つように構成した循環式給湯機は知られている。[0004] In addition, the end of the hot water supply pipe and the water supply pipe are connected by a return pipe to form a circulation path by a path of a hot water pipe, a return pipe, a water supply pipe, a heat exchanger, and a hot water pipe, and circulates in the circulation path. 2. Description of the Related Art There is known a circulation type hot water supply device in which a pump is provided to circulate hot water in a circulation path, and when hot water supply is stopped, hot water in the circulation path is maintained at a desired temperature by intermittent combustion control.
【０００５】このような循環式給湯機は、給湯停止時に
も循環経路内の湯水を所望の温度に保つことができるの
で、給湯状態には給湯開始時から所望の温度の湯水を供
給できる利点がある。[0005] Such a circulating water heater can maintain hot water in the circulation path at a desired temperature even when the hot water supply is stopped. Therefore, in the hot water supply state, there is an advantage that hot water at a desired temperature can be supplied from the start of hot water supply. is there.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来のバイパ
ス式給湯装置では、熱交換器出口から蛇口までの湯の冷
却に対応できない課題があり、従来の循環式給湯機で
は、循環加熱水流出後に流入してくる冷たい水道水に対
して迅速な湯温立上がりを施すことができなかった。こ
の要求を満足させるため、バイパス付き給湯機と循環式
給湯機の利点を組合せ、給湯停止状態に間欠燃焼させて
循環経路内の湯水を所望の温度に保ち、給湯開始時から
所望の温度で多量の湯水を供給できるように構成しよう
としても、給湯停止状態には循環経路内の湯水の温度が
設定温度に近い温度に保たれるため、給湯状態のバイパ
ス付き給湯装置の有する機能は損われ、循環加熱水流出
後に大幅な湯温低下（アンダーシュート）を起こすとい
う課題があった。However, the conventional bypass-type hot water supply system has a problem that it cannot cope with cooling of hot water from the heat exchanger outlet to the faucet. The hot tap water could not be quickly raised to the incoming cold tap water. In order to satisfy this demand, the advantages of the water heater with bypass and the circulation type water heater are combined, and the hot water in the circulation path is maintained at the desired temperature by intermittently burning in the hot water supply stopped state, and a large amount of water at the desired temperature from the start of hot water supply. Even if an attempt is made to supply hot and cold water, in the hot water supply stopped state, the temperature of the hot and cold water in the circulation path is maintained at a temperature close to the set temperature, so that the function of the hot water supply device with a bypass in the hot water supply state is impaired, There was a problem that a significant drop in the hot water temperature (undershoot) occurs after the circulation heating water flows out.
【０００７】この発明はこのような課題を解決するため
になされたもので、給湯開始直後でも所望の温度の湯を
供給するとともに、大幅な湯温低下（アンダーシュー
ト）を起こすことのない循環式給湯装置を提供すること
を目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and supplies a hot water of a desired temperature even immediately after the start of hot water supply, and a recirculation system that does not cause a significant drop in the hot water temperature (undershoot). It is an object to provide a hot water supply device.
【０００８】[0008]
【課題を解決するための手段】前記課題を解決するため
この発明に係る循環式給湯装置は、熱交換器を介して給
水管に接続された給湯管と、この給湯管と混合部で接続
され給水管と分岐部で接続されたバイパス管と、熱交換
器を通過する湯と前記バイパス管を通過する水の混合比
率を制御する混合部と、混合部より下流の給湯管と分岐
部より上流の給水管に接続された戻り管と、この戻り管
を介して給湯管の湯を給水管に送出する循環ポンプと、
熱交換器を加熱する加熱部と、循環ポンプ停止後も加熱
部による加熱を継続させる加熱制御部を備えたことを特
徴とする。SUMMARY OF THE INVENTION In order to solve the above problems, a circulation type hot water supply apparatus according to the present invention is connected to a hot water supply pipe connected to a hot water supply pipe via a heat exchanger, and is connected to the hot water supply pipe at a mixing section. A bypass pipe connected to the water supply pipe at a branch, a mixing section for controlling a mixing ratio of hot water passing through the heat exchanger and water passing through the bypass pipe, and a hot water pipe downstream of the mixing section and upstream of the branch; A return pipe connected to the water supply pipe, and a circulating pump that sends out hot water from the hot water supply pipe to the water supply pipe through the return pipe;
A heating unit for heating the heat exchanger and a heating control unit for continuing heating by the heating unit even after the circulation pump is stopped are provided.
【０００９】また、この発明に係る循環式給湯装置は、
熱交換器を介して給水管に接続された給湯管と、この給
湯管と混合部で接続され給水管と分岐部で接続されたバ
イパス管と、熱交換器を通過する湯とバイパス管を通過
する水の混合比率を制御する混合部と、混合部より下流
の給湯管と分岐部より上流の給水管に接続された戻り管
と、この戻り管を介して給湯管の湯を給水管に送出する
ポンプと、熱交換器を加熱する加熱部と、混合部より下
流の給湯管の湯の設定温度を出力する温度設定部と、給
湯管を通過する湯の温度を設定温度に維持するための必
要熱量を算出する必要熱量演算部とを備え、この必要熱
量に基づき加熱部の加熱量を制御する循環式給湯装置に
おいて、循環ポンプの停止条件を判断する循環停止条件
判断部と、この循環停止条件判断部の出力に基づき加熱
部の加熱量を前記必要熱量より大きい熱量に制御する加
熱制御部とを備えたことを特徴とする。Further, the circulation type hot water supply apparatus according to the present invention comprises:
A hot water pipe connected to a hot water pipe through a heat exchanger, a hot water pipe connected to the hot water pipe at a mixing section and a hot water pipe connected at a branch section, and hot water passing through the heat exchanger and passing through a hot bypass pipe A mixing section for controlling a mixing ratio of water to be mixed, a return pipe connected to a hot water supply pipe downstream of the mixing section and a water supply pipe upstream of the branch section, and hot water of the hot water supply pipe is sent to the water supply pipe via the return pipe. Pump, a heating unit that heats the heat exchanger, a temperature setting unit that outputs a set temperature of hot water in the hot water supply pipe downstream of the mixing unit, and a temperature setting unit that maintains the temperature of hot water passing through the hot water supply pipe at the set temperature. A circulating stop condition judging unit for judging a circulating pump stop condition in a circulating hot water supply device comprising a required calorie calculating unit for calculating a required calorie, and controlling a heating amount of the heating unit based on the required calorie; The heating amount of the heating unit is determined based on the output of the condition determination unit. Characterized in that a heating control section for controlling a large amount of heat than the main heat.
【００１０】また、この発明に係る循環式給湯装置の加
熱制御部は、設定温度が所定温度以上の場合、加熱部に
よる循環ポンプ停止後の加熱継続を行わさせないことを
特徴とする。Further, the heating control section of the circulation type hot water supply apparatus according to the present invention is characterized in that when the set temperature is equal to or higher than the predetermined temperature, the heating section does not continue heating after the circulation pump is stopped.
【００１１】さらに、この発明に係る循環式給湯装置の
加熱制御部は、設定温度が所定温度以上の場合、循環停
止条件判断部の出力にかかわらず加熱部の加熱量を必要
熱量に制御することを特徴とする。Further, the heating control section of the circulation type hot water supply apparatus according to the present invention controls the heating amount of the heating section to a required heating amount regardless of the output of the circulation stop condition judging section when the set temperature is equal to or higher than the predetermined temperature. It is characterized by.
【００１２】[0012]
【作用】この発明に係る循環式給湯装置は、給湯停止状
態において循環ポンプ停止後も加熱部を制御して熱交換
器内に滞留する湯を高温に保つことができる。With the circulation type hot water supply apparatus according to the present invention, the hot water staying in the heat exchanger can be maintained at a high temperature by controlling the heating unit even after the circulation pump is stopped in the hot water supply stop state.
【００１３】また、循環停止条件判断部の出力に基づい
て、加熱部の加熱量を必要熱量より大きな熱量に制御す
るため、循環停止時に熱交換器内に滞留する湯を高温に
することができる。Further, since the heating amount of the heating unit is controlled to a heat amount larger than the required heat amount based on the output of the circulation stop condition judging unit, the temperature of the hot water staying in the heat exchanger when the circulation is stopped can be increased. .
【００１４】また、設定温度が高い場合は、循環ポンプ
停止後も加熱を継続させたり、必要熱量以上で加熱した
りしないため、熱交換器に滞留する湯が沸騰を起こすお
それがない。When the set temperature is high, heating is not continued even after the circulation pump is stopped, or heating is not performed with a required amount of heat or more. Therefore, there is no possibility that hot water staying in the heat exchanger will boil.
【００１５】[0015]
【実施例】以下、この発明の実施例を添付図面に基づい
て説明する。図１はこの発明に係る循環式給湯装置の全
体構成図である。図１において、循環式給湯装置１は、
給水管２と、熱交換器３と、湯水混合部４と、給湯管５
と、給湯管５の末端部に取付けられた給湯栓６と、給湯
管５の末端部と給水管２の入水側に配設した戻り管８
と、戻り管８の途中に設けられた循環ポンプ７と、給水
管２―熱交換器３―湯水混合部４―給湯管５―戻り管８
（途中循環ポンプ７を経由）―給水管２および給水管２
―バイパス管１０―湯水混合部４―給湯管５―戻り管８
（途中循環ポンプ７を経由）―給水管２の２経路でルー
プを構成する循環経路９と、熱交換器３をバイパスして
給水管２と湯水混合部４を接続するバイパス管１０と、
ガス管１１に設けられ、ガスの供給／停止を行う電磁弁
１２、熱交換器３を加熱するガスバーナ１４およびガス
バーナ１４へのガス量を調節するガス比例弁１３を備え
た加熱部と、循環式給湯装置１全体の動作の制御や処理
を行う制御手段１９と、循環式給湯装置１の各種機能設
定を行うコントローラ操作部２０とから構成する。Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a circulation type hot water supply apparatus according to the present invention. In FIG. 1, the circulation type hot water supply device 1
Water supply pipe 2, heat exchanger 3, hot and cold water mixing section 4, hot water supply pipe 5
A hot water tap 6 attached to a distal end of the hot water supply pipe 5, and a return pipe 8 disposed on a water inlet side of the hot water supply pipe 5 and the distal end of the hot water supply pipe 2.
And a circulation pump 7 provided in the middle of the return pipe 8, a water supply pipe 2-a heat exchanger 3-a hot and cold water mixing section 4-a hot water supply pipe 5-a return pipe 8
(Via circulation pump 7 on the way)-Water supply pipe 2 and water supply pipe 2
-Bypass pipe 10-Hot water mixing section 4-Hot water supply pipe 5-Return pipe 8
(Via the circulation pump 7 on the way)-a circulation path 9 forming a loop with two paths of the water supply pipe 2, a bypass pipe 10 connecting the water supply pipe 2 and the hot and cold water mixing section 4 by bypassing the heat exchanger 3,
A heating unit provided in the gas pipe 11 and provided with an electromagnetic valve 12 for supplying / stopping gas, a gas burner 14 for heating the heat exchanger 3, and a gas proportional valve 13 for adjusting the amount of gas to the gas burner 14; The water heater 1 includes a control unit 19 that controls and processes the entire operation of the water heater 1, and a controller operation unit 20 that sets various functions of the circulation water heater 1.
【００１６】また、給水管２には、戻り管８が接続され
る給水管２の下流側の給水温度Ｔｃを検出する給水温度
（Ｔｃ）検出部１５、給水管２を通過する水量Ｑを検出
する水量（Ｑ）検出部１６を設け、給湯管５には、熱交
換器３の出口温度Ｔｈを検出する熱交出口温度（Ｔｈ）
検出部１７および湯水混合部４の下流側の混合湯温度Ｔ
ｍを検出する混合湯温度（Ｔｍ）検出部１８を備える。The water supply pipe 2 has a water supply temperature (Tc) detector 15 for detecting a water supply temperature Tc downstream of the water supply pipe 2 to which the return pipe 8 is connected, and a water quantity Q passing through the water supply pipe 2. A heat exchange outlet temperature (Th) for detecting an outlet temperature Th of the heat exchanger 3 is provided in the hot water supply pipe 5 in the water supply (Q) detecting unit 16.
The mixed hot water temperature T on the downstream side of the detection unit 17 and the hot and cold water mixing unit 4
and a mixed hot water temperature (Tm) detector 18 for detecting the temperature of the mixed hot water.
【００１７】湯水混合部４は、熱交換器３からの高温の
湯とバイパス管１０を通過してくる水を制御手段１９か
らの制御により、所定の混合比率で混合して給湯管に送
り、給湯栓６からコントローラ操作部２０の温度設定部
２０Ｂで設定された温度の湯水を供給する。The hot water mixing section 4 mixes the high temperature hot water from the heat exchanger 3 and the water passing through the bypass pipe 10 at a predetermined mixing ratio under the control of the control means 19 and sends the mixed water to the hot water supply pipe. Hot water with the temperature set by the temperature setting section 20B of the controller operation section 20 is supplied from the hot water tap 6.
【００１８】循環ポンプ７は、制御手段１９によりポン
プの駆動／停止を制御され、給湯停止状態には循環経路
９内の湯水を循環させ、循環経路９内の湯水の温度を温
度設定部２０Ｂで設定した温度に近い温度に保ち、給湯
状態の給湯開始時から設定温度に近い給湯ができるよう
にする。The driving / stopping of the circulating pump 7 is controlled by the control means 19, and when the hot water supply is stopped, the hot and cold water in the circulating passage 9 is circulated, and the temperature of the hot and cold water in the circulating passage 9 is set by the temperature setting section 20B. The temperature is kept close to the set temperature so that hot water can be supplied close to the set temperature from the start of hot water supply in the hot water supply state.
【００１９】電磁弁１２は、制御手段１９により弁の開
放／閉結を制御されてガス管１１を通過するガスの供給
／停止を行い、給湯状態には開放とし、給湯停止状態に
は間欠燃焼モードの間欠燃焼周期に従い、弁の開放／閉
結を繰り返す。The solenoid valve 12 is controlled by a control means 19 to open / close the valve to supply / stop the gas passing through the gas pipe 11, open when hot water is supplied, and intermittently when hot water supply is stopped. The valve is repeatedly opened / closed according to the intermittent combustion cycle of the mode.
【００２０】ガス比例弁１３は、制御手段１９により比
例弁の開度を制御され、適切な燃焼量で加熱して温度設
定部２０Ｂで設定された温度の湯水が供給できるようガ
スバーナ１４へのガス供給量を調節する。The gas proportional valve 13 is controlled by the control means 19 to control the opening of the proportional valve. The proportional valve is heated by an appropriate amount of combustion and supplied to the gas burner 14 so as to supply hot and cold water at the temperature set by the temperature setting section 20B. Adjust the feed rate.
【００２１】制御手段１９は、マイクロプロセッサ（図
示しない）を基本として構成され、循環制御手段３０、
熱量演算手段４０、加熱制御手段５０および混合部制御
手段６０を備え、循環制御手段３０は循環ポンプ７の駆
動／停止制御、熱量演算手段４０は加熱制御手段５０が
必要とするさまざまな熱量の演算、加熱制御手段５０は
熱量演算手段４０が演算した熱量に基づいて電磁弁１２
およびガス比例弁１３の制御、混合部制御手段６０は湯
水混合部４の制御をそれぞれ行う。The control means 19 is constructed on the basis of a microprocessor (not shown).
The circulation control means 30 includes drive / stop control of the circulation pump 7, and the heat quantity calculation means 40 calculates various heat quantities required by the heat control means 50. The heating control means 50 controls the solenoid valve 12 based on the heat quantity calculated by the heat quantity calculation means 40.
The control of the gas proportional valve 13 and the mixing unit control means 60 control the hot and cold water mixing unit 4 respectively.
【００２２】コントローラ操作部２０は、給湯停止状態
の間欠燃焼制御を設定するための保温スイッチ２０Ａお
よび給湯状態ならびに給湯停止状態の混合湯温度Ｔｍを
設定する温度設定部２０Ｂを備え、それぞれ保温設定信
号２０ａ、設定温度（Ｔｓ）信号２０ｂを制御手段１９
に出力する。The controller operation unit 20 includes a heat retention switch 20A for setting intermittent combustion control in a hot water supply stopped state and a temperature setting unit 20B for setting a hot water supply state and a mixed hot water temperature Tm in the hot water supply stopped state. 20a, the set temperature (Ts) signal 20b
Output to
【００２３】次に、循環式給湯装置１の給湯状態（比例
燃焼制御）について、概略を説明する。給湯栓６を開い
て給湯を開始すると、制御手段１９は給湯状態と判断
し、加熱制御手段５０から電磁弁駆動信号５０ａを電磁
弁１２に送り、電磁弁１２を開放状態とする。制御手段
１９の熱量演算手段４０は、温度設定部２０Ｂからの設
定温度（Ｔｓ）信号２０ｂ、給水温度（Ｔｃ）検出部１
５で検出した給水温度（Ｔｃ）信号１５ａ、水量（Ｑ）
検出部１６で検出した水量（Ｑ）信号１６ａに基づいて
必要熱量ＦＦを演算し、加熱制御手段５０は必要熱量Ｆ
Ｆに対応した大きな熱量が得られるように比例弁駆動信
号５０ｂをガス比例弁１３に出力し、ガスバーナ１４か
ら適切な燃焼量が得られるようにガス量を調節する。Next, an outline of a hot water supply state (proportional combustion control) of the circulation type hot water supply apparatus 1 will be described. When the hot water tap 6 is opened to start hot water supply, the control means 19 determines that the hot water is being supplied, and sends a solenoid valve driving signal 50 a from the heating control means 50 to the solenoid valve 12 to open the solenoid valve 12. The calorie calculating means 40 of the control means 19 includes the set temperature (Ts) signal 20b from the temperature setting section 20B and the feedwater temperature (Tc) detecting section 1
Water temperature (Tc) signal 15a detected in step 5, water flow (Q)
The required heat amount FF is calculated based on the water amount (Q) signal 16a detected by the detection unit 16, and the heating control means 50 calculates the required heat amount F
The proportional valve drive signal 50b is output to the gas proportional valve 13 so that a large amount of heat corresponding to F is obtained, and the gas amount is adjusted so that an appropriate combustion amount is obtained from the gas burner 14.
【００２４】また、熱量演算手段４０は、混合湯温度
（Ｔｍ）検出部１８で検出した混合湯温度（Ｔｍ）信号
１８ａに基づいて必要熱量を補正した補正熱量Ｆを演算
し、加熱制御手段５０はこの補正熱量Ｆに対応した比例
弁駆動信号５０ｂでガス比例弁１３の弁開度を修正して
ガスバーナ１４の燃焼量を補正し、混合湯温度Ｔｍが設
定温度Ｔｓに一致するまで熱量演算および加熱制御の動
作が継続する。The calorie computing means 40 computes a corrected calorie F by compensating the required calorie based on the mixed hot water temperature (Tm) signal 18a detected by the mixed hot water temperature (Tm) detector 18. Corrects the valve opening of the gas proportional valve 13 with the proportional valve drive signal 50b corresponding to the corrected heat amount F to correct the combustion amount of the gas burner 14, and calculates the heat amount until the mixed bath temperature Tm matches the set temperature Ts. The operation of the heating control continues.
【００２５】制御手段１９の混合部制御手段６０は、設
定温度（Ｔｓ）信号２０ｂ、給水温度（Ｔｃ）信号１５
ａ、熱交出口温度（Ｔｈ）信号１７ａおよび混合湯温度
（Ｔｍ）信号１８ａに基づいて湯水混合部４の弁開度
（熱交換器３側およびバイパス管１０側）を演算し、こ
の演算結果に対応した混合弁駆動信号６０ａを湯水混合
部４に送り、熱交換器３からの熱交出口温度Ｔｈの湯と
バイパス管１０からの給水温度Ｔｃとの水を適切に混合
して混合湯温度Ｔｍ（設定温度Ｔｓ）の湯水を給湯栓６
から供給する。The mixing section control means 60 of the control means 19 includes a set temperature (Ts) signal 20b and a feed water temperature (Tc) signal 15
a, the valve opening degree (the heat exchanger 3 side and the bypass pipe 10 side) of the hot and cold water mixing section 4 is calculated based on the heat exchange outlet temperature (Th) signal 17a and the mixed hot water temperature (Tm) signal 18a, and the calculation result Is sent to the hot and cold water mixing section 4 to appropriately mix the hot water at the heat exchange outlet temperature Th from the heat exchanger 3 and the water supply temperature Tc from the bypass pipe 10 to mix the hot water. Hot water of Tm (set temperature Ts) 6
Supplied from
【００２６】このように、バイパス管１０および湯水混
合部４を備えたバイパス付給湯機は、給湯状態におい
て、設定温度Ｔｓよりも充分高い温度（熱交出力温度Ｔ
ｈ）の湯を得ておき、湯水混合部４でバイパス管１０か
らの水（給水温度Ｔｃ）を混合して、混合湯温度Ｔｍ
（設定温度Ｔｓ）の湯水を供給することができる。よっ
て、熱交換器３を高温に保ち、給湯再開から設定温度の
湯水が供給できるまでの時間を短くすることができるも
のである。As described above, the hot water supply device with the bypass provided with the bypass pipe 10 and the hot / water mixing section 4 has a temperature (heat exchange output temperature T) sufficiently higher than the set temperature Ts in the hot water supply state.
h) hot water is obtained, and water (water supply temperature Tc) from the bypass pipe 10 is mixed in the hot and cold water mixing section 4 to obtain a mixed hot water temperature Tm.
Hot water of (set temperature Ts) can be supplied. Therefore, the heat exchanger 3 can be maintained at a high temperature, and the time from the restart of hot water supply to the supply of hot water at the set temperature can be shortened.
【００２７】続いて、給湯停止状態（間欠燃焼制御）の
動作について説明する。コントローラ操作部２０の保温
スイッチ２０Ａがオンに設定された状態で給湯栓６を閉
じて給湯停止状態になると、制御手段１９の循環制御手
段３０から循環ポンプ駆動信号３０ａが循環ポンプ７に
供給され、循環ポンプ７が動作して循環経路９に貯えら
れた湯水が循環経路９内を経由して循環する。湯水の循
環がある時間経過し、循環経路９内の湯水が設定温度Ｔ
ｓに保たれると、循環制御手段３０は循環ポンプ駆動信
号３０ａの出力を停止して循環ポンプは停止する。Next, the operation in the hot water supply stop state (intermittent combustion control) will be described. When the hot water tap 6 is closed and the hot water supply is stopped in a state where the heat retaining switch 20A of the controller operation section 20 is set to ON, a circulation pump driving signal 30a is supplied from the circulation control means 30 of the control means 19 to the circulation pump 7, The circulation pump 7 operates and the hot and cold water stored in the circulation path 9 circulates through the circulation path 9. After a certain time has passed since the circulation of the hot water, the hot water in the circulation path 9 has reached the set temperature T.
When s is maintained, the circulation control means 30 stops outputting the circulation pump drive signal 30a, and the circulation pump is stopped.
【００２８】また、制御手段１９の混合部制御手段６０
から混合弁駆動信号６０ａが湯水混合弁４に供給され、
湯水混合弁４は混合湯温度Ｔｍがコントローラ操作部２
０の温度設定部２０Ｂで設定した設定温度Ｔｓとなるよ
う混合弁の混合比率を調節して、熱交出口温度Ｔｈの湯
とバイパス管１０の給水温度Ｔｃの水を混合する。The mixing unit control means 60 of the control means 19
Is supplied to the hot and cold water mixing valve 4 from the
The hot and cold water mixing valve 4 controls the temperature of the mixed hot water Tm by the controller operating unit 2.
The mixing ratio of the mixing valve is adjusted so as to be the set temperature Ts set by the temperature setting unit 20B of 0, and the hot water at the heat exchange outlet temperature Th and the water at the feed water temperature Tc of the bypass pipe 10 are mixed.
【００２９】給湯が停止されると、循環制御手段３０
は、循環開始条件を判断して循環ポンプ駆動信号３０ａ
を出力して循環ポンプ７を駆動し湯水を循環させ、循環
する湯水の温度が所定の温度になると、循環停止条件を
判断して循環ポンプ７を停止する。湯水が循環している
状態において、混合部制御手段６０は、混合弁駆動信号
６０ａを出力することにより、湯水混合部４の混合弁を
調節して循環する湯水の温度が所定の温度（例えば設定
温度Ｔｓ）となるよう制御する。When the hot water supply is stopped, the circulation control means 30
Determines the circulation start condition and determines the circulation pump drive signal 30a.
Is output to drive the circulation pump 7 to circulate hot water. When the temperature of the circulating hot water reaches a predetermined temperature, the circulation stop condition is determined and the circulation pump 7 is stopped. In a state where the hot and cold water is circulating, the mixing section control means 60 outputs the mixing valve driving signal 60a to adjust the mixing valve of the hot and cold water mixing section 4 so that the temperature of the hot and cold water circulates at a predetermined temperature (for example, a set temperature). (Ts).
【００３０】熱量演算手段４０は、循環経路９内に設け
られた水量検出部および各種温度検出部からの信号に基
づいて間欠燃焼に必要な必要熱量、補正熱量等の熱量を
演算し、演算結果の熱量情報を加熱制御手段５０に提供
する。加熱制御手段５０は、熱量演算手段４０からの熱
量情報に基づいて、間欠燃焼の周期を演算して電磁弁１
２の開閉を制御したり、高温の熱交出口温度Ｔｈを確保
するに必要な燃焼量が得られるよう比例弁駆動信号５０
ｂをガス比例弁１３に提供してガスバーナ１４へのガス
供給量を制御する。The calorie computing means 40 computes the calorie, such as the calorie necessary for intermittent combustion and the calorie calorie, based on signals from the water amount detector and the various temperature detectors provided in the circulation path 9, and the calculation result Is provided to the heating control means 50. The heating control means 50 calculates the intermittent combustion cycle based on the heat amount information from the heat amount
The proportional valve drive signal 50 is controlled so that the amount of combustion required to control the opening and closing of the valve 2 and to secure the high heat exchange outlet temperature Th is obtained.
b is supplied to the gas proportional valve 13 to control the amount of gas supplied to the gas burner 14.
【００３１】また、加熱制御手段５０は、循環制御手段
３０の循環停止条件に基づいて、熱量演算手段４０で演
算した特定熱量を選択し、この特定熱量に基づいて電磁
弁駆動信号５０ａを出力して間欠燃焼周期を変化した
り、比例弁駆動信号５０ｂを出力してガス量を変化する
よう制御する。The heating control means 50 selects a specific heat quantity calculated by the heat quantity calculation means 40 based on the circulation stop condition of the circulation control means 30, and outputs a solenoid valve drive signal 50a based on the specific heat quantity. To control the intermittent combustion cycle or output the proportional valve drive signal 50b to change the gas amount.
【００３２】さらに、加熱制御手段５０は、温度設定部
２０Ｂの設定温度Ｔｓが所定の温度を超える場合には、
循環制御手段３０の循環停止条件に関係なく必要熱量で
加熱制御するように構成する。Further, when the set temperature Ts of the temperature setting unit 20B exceeds a predetermined temperature, the heating control means 50
The heating is controlled by the required amount of heat regardless of the circulation stop condition of the circulation control means 30.
【００３３】図２はこの発明に係る給湯停止状態におけ
る制御手段のブロック構成図である。図２において、制
御手段１９は、循環制御手段３０、熱量演算手段４０、
加熱制御手段５０および混合部制御手段６０を備える。
循環制御手段３０は、循環ポンプ７の駆動／停止制御お
よび間欠燃焼を制御するように構成し、循環開始条件判
定部３１、循環停止条件判定部３２および循環ポンプ制
御部３３を備える。FIG. 2 is a block diagram of the control means in the hot water supply stop state according to the present invention. In FIG. 2, the control means 19 includes a circulation control means 30, a heat quantity calculation means 40,
A heating control unit 50 and a mixing unit control unit 60 are provided.
The circulation control means 30 is configured to control driving / stopping of the circulation pump 7 and intermittent combustion, and includes a circulation start condition determination unit 31, a circulation stop condition determination unit 32, and a circulation pump control unit 33.
【００３４】循環開始条件判定部３１は、設定温度Ｔ
ｓ、給水温度Ｔｃおよび混合湯温度Ｔｍの温度情報に基
づいて循環ポンプ７の循環開始を判定し、循環開始（Ｊ
ｏ）情報３１ａを循環ポンプ制御部３３に出力し、循環
ポンプ制御部３３から循環ポンプ駆動（Ｐｃ）信号３０
ａを出力して循環ポンプ７を駆動する。なお、循環開始
条件は、例えば混合湯温度Ｔｍが給水温度Ｔｃより所定
の温度ΔＴ１低下（Ｔｍ＜Ｔｃ−ΔＴ１）したり、給水
温度Ｔｃが設定温度Ｔｓより所定の温度ΔＴ２低下（Ｔ
ｃ＜Ｔｓ−ΔＴ２）した場合、または間欠燃焼の加熱停
止後の所定時間（ｔ１秒）経過した場合とする。The circulation start condition judging section 31 determines the set temperature T
s, the start of circulation of the circulation pump 7 is determined based on the temperature information of the feed water temperature Tc and the mixed hot water temperature Tm, and the circulation start (J
o) The information 31a is output to the circulation pump control unit 33, and the circulation pump drive (Pc) signal 30 is output from the circulation pump control unit 33.
is output to drive the circulation pump 7. The circulation start condition is, for example, that the temperature of the mixed hot water Tm drops by a predetermined temperature ΔT1 from the feedwater temperature Tc (Tm <Tc−ΔT1), or that the temperature of the feedwater Tc drops by a predetermined temperature ΔT2 from the set temperature Ts (T
c <Ts−ΔT2) or when a predetermined time (t1 second) has elapsed after the intermittent combustion heating was stopped.
【００３５】循環停止条件判定部３２は、設定温度Ｔ
ｓ、給水温度Ｔｃおよび後で説明する必要熱量ＦＦに基
づいて循環停止を判定し、循環停止（Ｊｃ）情報３２ａ
を循環ポンプ制御部３３および加熱制御手段５０のポス
ト燃焼制御部５１に出力し、循環ポンプ制御部３３から
循環ポンプ停止（Ｐｃ）信号３０ａを出力して駆動され
ている循環ポンプ７を停止するよう構成する。なお、循
環停止条件は、例えば給水温度Ｔｃが設定温度Ｔｓより
も高い（Ｔｃ＞Ｔｓ）期間が所定時間（ｔ２秒）を超え
て継続する場合、または必要熱量ＦＦが予め設定されい
る最低熱量Ｆｍｉｎ１より小さい（ＦＦ＜Ｆｍｉｎ１）
時間が所定時間（ｔ３秒）を超えて継続する場合とす
る。The circulation stop condition judging section 32 determines the set temperature T
s, the supply water temperature Tc, and the required amount of heat FF, which will be described later, to determine the circulation stop, and the circulation stop (Jc) information 32a.
To the post-combustion control unit 51 of the circulation pump control unit 33 and the heating control unit 50, and outputs the circulation pump stop (Pc) signal 30a from the circulation pump control unit 33 to stop the driven circulation pump 7. Constitute. The circulation stop condition is, for example, when the supply water temperature Tc is higher than the set temperature Ts (Tc> Ts) for more than a predetermined time (t2 seconds), or when the required heat amount FF is set to the minimum heat amount Fmin1. Less than (FF <Fmin1)
It is assumed that the time continues beyond a predetermined time (t3 seconds).
【００３６】熱量演算手段４０は、温度設定部２０Ｂか
らの設定温度（Ｔｓ）信号２０ｂに対応した設定温度
（Ｔｓ）情報４１ａを出力する目標温度設定部４１、必
要熱量演算部４２、補正熱量演算部４３、特定熱量演算
部４４、熱量選択部４５および比例・間欠モード選択部
４６を備える。The calorie computing means 40 includes a target temperature setter 41 for outputting set temperature (Ts) information 41a corresponding to the set temperature (Ts) signal 20b from the temperature setter 20B, a required calorie calculator 42, a corrected calorie calculator. A unit 43, a specific calorific value calculating unit 44, a calorific value selecting unit 45, and a proportional / intermittent mode selecting unit 46 are provided.
【００３７】必要熱量演算部４２は、目標温度設定部４
１から出力される設定温度（Ｔｓ）情報４１ａ、水量検
出部１６からの水量（Ｑ）信号１６ａおよび給水温度検
出部１５からの給水温度（Ｔｃ）信号１５ａに基づいて
間欠燃焼に必要な必要熱量ＦＦ＝Ｑ×（Ｔｓ−Ｔｃ）を
演算し、必要熱量（ＦＦ）情報４２ａを補正熱量演算部
４３および比例・間欠モード選択部４６に供給する。The required calorie computing section 42 includes a target temperature setting section 4
1 based on the set temperature (Ts) information 41a, the water quantity (Q) signal 16a from the water quantity detection unit 16 and the water supply temperature (Tc) signal 15a from the water supply temperature detection unit 15 FF = Q × (Ts−Tc) is calculated, and the required heat amount (FF) information 42 a is supplied to the corrected heat amount calculation unit 43 and the proportional / intermittent mode selection unit 46.
【００３８】補正熱量演算部４３は、設定温度（Ｔｓ）
情報４１ａ、必要熱量（ＦＦ）情報４２ａおよび混合湯
温度検出部１８からの混合湯温度（Ｔｍ）情報１８ａに
基づいて必要熱量ＦＦを補正し、補正熱量（Ｆ）情報４
３ａを熱量選択部４５に送る。補正熱量Ｆは、設定温度
Ｔｓと混合湯温度Ｔｍの偏差に基づきフィードバック熱
量を算出することにより、熱交換器３の効率およびガス
圧力の変化、水量および各種温度検出器のばらつきを吸
収することができ、このフィードバック熱量に必要熱量
ＦＦを加算して算出する。The correction calorie calculation unit 43 calculates the set temperature (Ts)
The required heat quantity FF is corrected based on the information 41a, the required heat quantity (FF) information 42a and the mixed hot water temperature (Tm) information 18a from the mixed hot water temperature detection unit 18, and the corrected heat quantity (F) information 4
3a is sent to the calorie selection unit 45. The correction calorie F can calculate the feedback calorie based on the difference between the set temperature Ts and the mixed hot water temperature Tm, thereby absorbing the variation of the efficiency and gas pressure of the heat exchanger 3, the water volume and the variation of various temperature detectors. It can be calculated by adding the required heat quantity FF to this feedback heat quantity.
【００３９】特定熱量演算部４４は、加熱制御手段５０
のポスト燃焼制御部５１からのポスト燃焼（Ｎｃ）情報
５１ａと補正熱量（Ｆ）情報４３ａを取込み、この補正
熱量（Ｆ）情報４３ａに対応して予め設定された変換テ
ーブルを用いて補正熱量Ｆより大きく、後述する比例・
間欠モード選択部４６が比例燃焼モードを選択するよう
な大きさの特定熱量Ｆｃに変換し、Ｎｃ情報が存在する
場合、特定熱量（Ｆｃ）情報４４ａを熱量選択部４５に
送る。The specific calorie computing section 44 includes a heating control means 50.
The post-combustion (Nc) information 51a and the corrected calorific value (F) information 43a from the post-combustion control unit 51 are fetched, and the corrected calorific value F is calculated using a conversion table preset in correspondence with the corrected calorific value (F) information 43a. Larger, proportional
The intermittent mode selection unit 46 converts the heat into a specific heat amount Fc of such a size as to select the proportional combustion mode, and sends the specific heat amount (Fc) information 44a to the heat amount selection unit 45 when the Nc information exists.
【００４０】熱量選択部４５は、補正熱量Ｆと特定熱量
Ｆｃのいずれかを所定の条件に従って選択し、選択した
熱量を選択熱量（Ｆｏ）信号４５ａとして加熱制御手段
５０の間欠燃焼周期演算部５４および比例弁制御部５５
に送る。なお、所定の条件は、ポスト燃焼（Ｎｃ）情報
５１ａが存在せず特定燃焼演算部４４から特定熱量（Ｆ
ｃ）情報４４ａが熱量選択部４５に提供されない場合に
は補正熱量Ｆを選択し、特定熱量（Ｆｃ）情報４４ａが
熱量選択部４５に供給される場合には特定熱量Ｆｃを選
択するよう構成する。The calorie selection unit 45 selects one of the correction calorie F and the specific calorie Fc in accordance with predetermined conditions, and uses the selected calorie as a selected calorie (Fo) signal 45a as the intermittent combustion cycle calculator 54 of the heating control means 50. And proportional valve controller 55
Send to The predetermined condition is that the post-combustion (Nc) information 51a does not exist and the specific combustion operation
c) When the information 44a is not provided to the heat amount selection unit 45, the correction heat amount F is selected, and when the specific heat amount (Fc) information 44a is supplied to the heat amount selection unit 45, the specific heat amount Fc is selected. .
【００４１】比例・間欠モード選択部４６は、熱量選択
部４５から供給される選択熱量Ｆｏの大小を監視して、
選択熱量Ｆｏが比例燃焼（給湯）状態の予め決定されて
いる熱量下限値（下限燃焼量に対応）以下の場合には間
欠燃焼モード（Ｈａ）情報４６ａを加熱制御手段５０の
間欠燃焼周期演算部５４および比例弁制御部５５に送
る。The proportional / intermittent mode selection section 46 monitors the magnitude of the selected heat quantity Fo supplied from the heat quantity selection section 45, and
When the selected heat amount Fo is equal to or smaller than a predetermined lower limit of heat amount (corresponding to the lower limit combustion amount) in the proportional combustion (hot water supply) state, the intermittent combustion mode (Ha) information 46a is used as the intermittent combustion cycle calculation unit of the heating control means 50. 54 and the proportional valve control unit 55.
【００４２】このように、熱量演算部４０は、選択熱量
Ｆｏの値で間欠燃焼制御と、比例燃焼制御のいずれか一
方を選択するとともに、間欠燃焼を必要熱量ＦＦを補正
した補正熱量Ｆに基づいて実行するか、特定熱量Ｆｃに
基づいて実行するか選択する。As described above, the calorie computing unit 40 selects either the intermittent combustion control or the proportional combustion control based on the value of the selected calorie Fo, and performs the intermittent combustion based on the corrected calorie F obtained by correcting the required calorie FF. Or based on the specific amount of heat Fc.
【００４３】加熱制御手段５０は、ポスト燃焼制御部５
１、加熱開始・停止条件判断部５２、電磁弁駆動部５
３、間欠燃焼周期演算部５４および比例弁制御部５５を
備える。ポスト燃焼制御部５１は、循環制御手段３０の
循環停止条件判定部３２の停止条件判定に基づいて出力
される循環停止（Ｊｃ）情報３２ａの供給を受けると、
ポスト燃焼（Ｎｃ）情報５１ａを所定時間熱量演算手段
４０の特定熱量演算部４４および加熱開始・停止条件判
断部５２に出力し、特定熱量Ｆｃの演算を実行、出力さ
せるとともに、加熱停止の実行を遅延させる。また、ポ
スト燃焼制御部５１は、熱量演算手段４０の目標温度設
定部４１からの設定温度情報４１ａの供給を受け、設定
温度Ｔｓが予め記憶されている所定の温度Ｔｓｋを超え
る場合には、ポスト燃焼（Ｎｃ）情報５１ａを出力しな
いように構成する。The heating control means 50 includes a post combustion control unit 5
1, heating start / stop condition judging section 52, solenoid valve driving section 5
3. An intermittent combustion cycle calculator 54 and a proportional valve controller 55 are provided. The post-combustion control unit 51 receives the supply of the circulation stop (Jc) information 32a output based on the stop condition determination of the circulation stop condition determination unit 32 of the circulation control unit 30,
The post-combustion (Nc) information 51a is output to the specific calorific value calculating unit 44 and the heating start / stop condition judging unit 52 of the calorific value calculating means 40 for a predetermined time to execute and output the calculation of the specific caloric value Fc and execute the heating stop. Delay. Further, the post combustion control unit 51 receives the supply of the set temperature information 41a from the target temperature setting unit 41 of the calorie computing unit 40, and if the set temperature Ts exceeds a predetermined temperature Tsk stored in advance, The configuration is such that the combustion (Nc) information 51a is not output.
【００４４】従って、温度Ｔｓｋを超える設定温度Ｔｓ
が入力されると、特定熱量Ｆｃの演算の実行、出力およ
び加熱停止の実行遅延は行われない。Therefore, the set temperature Ts exceeding the temperature Tsk
Is input, the execution of the calculation of the specific heat amount Fc, the output, and the execution delay of the heating stop are not performed.
【００４５】加熱開始・停止条件判断部５２は、加熱開
始または加熱停止の条件判断を行い、加熱開始・停止条
件判断（Ｋｃ）情報５２ａを電磁弁駆動部５３に出力す
る。加熱開始・停止条件の判断は、必要熱量ＦＦ、水量
Ｑ、設定温度Ｔｓおよび給水温度Ｔｃに基づいて行い、
例えば必要熱量ＦＦが予め設定された下限熱量Ｆｍｉｎ
２を超える（ＦＦ＞Ｆｍｉｎ２）状態が所定時間（ｔ４
秒）継続するとともに水量Ｑが予め設定された下限水量
Ｑｍｉｎ２を超える（Ｑ＞Ｑｍｉｎ２）場合には、電磁
弁を開放させるような加熱開始・停止条件判断（Ｋｃ）
情報５２ａを電磁弁駆動部５３に出力するよう構成す
る。一方、例えば必要熱量ＦＦが予め設定された最小熱
量Ｆｍｉｎ１以下（ＦＦ≦Ｆｍｉｎ１）の場合、給水温
度Ｔｃが設定温度Ｔｓを超える（Ｔｃ＞Ｔｓ）時間が所
定時間（ｔ５秒）継続する場合、または水量Ｑが予め設
定された最小水量Ｑｍｉｎ１以下（Ｑ≦Ｑｍｉｎ１）の
場合には、電磁弁を閉結させるような加熱開始・停止条
件判断（Ｋｃ）情報５２ａを電磁弁駆動部５３に出力す
るよう構成する。また、加熱開始・停止条件判断部５２
は、ポスト燃焼制御部５１からのポスト燃焼（Ｎｃ）情
報５１ａの供給を受け、このＮｃ情報５１ａを入力して
いる間は、電磁弁を閉結させるような加熱開始・停止条
件判断（Ｋｃ）情報５２ａを出力しない。従って、循環
停止条件成立後、Ｎｃ情報５１ａが出力される所定時間
内に加熱停止条件が成立したとしても、電磁弁の閉結は
即時行われることなく、遅延して行われることになる。The heating start / stop condition judging section 52 judges the condition of heating start or heating stop, and outputs heating start / stop condition judgment (Kc) information 52 a to the solenoid valve driving section 53. The determination of the heating start / stop condition is performed based on the required heat amount FF, the water amount Q, the set temperature Ts, and the supply water temperature Tc,
For example, the required heat quantity FF is set to a preset lower limit heat quantity Fmin.
2 (FF> Fmin2) for a predetermined time (t4
Sec), if the water amount Q exceeds the lower limit water amount Qmin2 set in advance (Q> Qmin2), a heating start / stop condition judgment to open the solenoid valve (Kc)
The information 52 a is configured to be output to the solenoid valve driving unit 53. On the other hand, for example, when the required heat amount FF is equal to or less than the preset minimum heat amount Fmin1 (FF ≦ Fmin1), when the supply water temperature Tc exceeds the set temperature Ts (Tc> Ts) for a predetermined time (t5 seconds), or When the water amount Q is equal to or less than the preset minimum water amount Qmin1 (Q ≦ Qmin1), the heating start / stop condition determination (Kc) information 52a for closing the electromagnetic valve is output to the electromagnetic valve driving unit 53. Constitute. The heating start / stop condition determination unit 52
Receives the post-combustion (Nc) information 51a from the post-combustion control unit 51, and determines the heating start / stop conditions (Kc) for closing the solenoid valve while the Nc information 51a is being input. Does not output information 52a. Therefore, even if the heating stop condition is satisfied within a predetermined time during which the Nc information 51a is output after the circulation stop condition is satisfied, the closing of the solenoid valve is not immediately performed, but is performed with a delay.
【００４６】電磁弁駆動部５３は、加熱開始・停止条件
判断部５２からの加熱開始・停止条件判断（Ｋｃ）情報
５２ａおよび間欠燃焼周期演算部５４からの間欠燃焼周
期（Ｔ）情報５４ａに基づいて、燃焼周期Ｔ（燃焼時間
Ｔ１＋消火時間Ｔ２）の燃焼時間（Ｔ１）は電磁弁１２
を開放し、消火時間（Ｔ２）は電磁弁１２を閉結するよ
うに電磁弁駆動（Ｄｃ）信号５０ａを供給して電磁弁１
２の開閉を制御する。The solenoid valve driving section 53 is based on the heating start / stop condition judgment (Kc) information 52a from the heating start / stop condition judgment section 52 and the intermittent combustion cycle (T) information 54a from the intermittent combustion cycle calculation section 54. The combustion time (T1) of the combustion cycle T (combustion time T1 + fire extinguishing time T2) is determined by the solenoid valve 12
The solenoid valve 1 is supplied by supplying a solenoid valve drive (Dc) signal 50a so as to close the solenoid valve 12 during the fire extinguishing time (T2).
2 is controlled to open and close.
【００４７】間欠燃焼周期演算部５４は、熱量演算手段
４０の比例・間欠モード選択部４６からの間欠燃焼モー
ド（Ｈａ）情報４６ａが供給された場合、熱量演算手段
４０の熱量選択部４５からの選択熱量（Ｆｏ）信号４５
ａに基づいて、予めＲＯＭ等のメモリに設定されている
熱量Ｆｏ―間欠周期Ｔ変換テーブルを参照して、熱量Ｆ
ｏに対応した間欠周期Ｔ（燃焼時間Ｔ１＋消火時間Ｔ
２）に変換し、間欠燃焼周期（Ｔ）情報５４ａを電磁弁
駆動部５３に出力する。When the intermittent combustion mode (Ha) information 46a is supplied from the proportional / intermittent mode selecting section 46 of the calorific value calculating means 40, the intermittent combustion cycle calculating section 54 receives the signal from the calorific value selecting section 45 of the calorific value calculating means 40. Selective heat (Fo) signal 45
a, a heat amount Fo-intermittent period T conversion table previously set in a memory such as a ROM, and a heat amount F
intermittent period T corresponding to o (combustion time T1 + fire extinguishing time T
2), and outputs the intermittent combustion cycle (T) information 54 a to the solenoid valve driving unit 53.
【００４８】比例弁制御部５５は、間欠燃焼周期演算部
５４と同様に間欠燃焼モード（Ｈａ）情報４６ａおよび
選択熱量（Ｆｏ）信号４５ａに基づいて、予めＲＯＭ等
のメモリに設定されている熱量Ｆｏ―弁開度Ｈｃ変換テ
ーブルを参照して、熱量Ｆｏに対応した弁開度Ｈｃに変
換し、比例弁駆動（Ｈｃ）信号５０ｂをガス比例弁１３
に出力する。Like the intermittent combustion cycle calculating section 54, the proportional valve control section 55 has a heat amount previously set in a memory such as a ROM based on the intermittent combustion mode (Ha) information 46a and the selected heat amount (Fo) signal 45a. Referring to the Fo-valve opening degree Hc conversion table, the table is converted into the valve opening degree Hc corresponding to the heat quantity Fo, and the proportional valve drive (Hc) signal 50b is converted to the gas proportional valve 13.
Output to
【００４９】混合部制御手段６０は、混合弁開度演算部
６１および混合弁制御部６２を備え、混合弁開度演算部
６１は、設定温度情報４１ａ、給水温度（Ｔｃ）信号１
５ａ、混合湯温度（Ｔｍ）信号１８ａおよび熱交出口温
度検出部１７からの熱交出口温度（Ｔｈ）信号１７ａに
基づいて混合弁開度Ｍｅを演算して混合弁開度（Ｍｅ）
情報６１ａを混合弁制御部６２に出力し、混合弁制御部
６２はこの混合弁開度（Ｍｅ）情報６１ａに対応した混
合弁駆動（Ｍｃ）信号６０ａを湯水混合部４に送る。The mixing section control means 60 includes a mixing valve opening calculation section 61 and a mixing valve control section 62. The mixing valve opening calculation section 61 includes a set temperature information 41a and a feed water temperature (Tc) signal 1
5a, the mixing valve opening Me is calculated on the basis of the mixed hot water temperature (Tm) signal 18a and the heat exchange outlet temperature (Th) signal 17a from the heat exchange outlet temperature detector 17, and the mixing valve opening Me is calculated.
The information 61a is output to the mixing valve control unit 62, and the mixing valve control unit 62 sends a mixing valve drive (Mc) signal 60a corresponding to the mixing valve opening (Me) information 61a to the hot and cold water mixing unit 4.
【００５０】このようにして、間欠燃焼制御状態では、
循環停止条件判定部３２から循環停止（Ｊｃ）情報３２
ａが出力されると、循環ポンプ７を停止するとともに、
ポスト燃焼制御部５１を介して、所定時間特定熱量演算
部４４を駆動し、補正熱量Ｆより大きな特定熱量Ｆｃお
よび比例燃焼モードを選定し、ガス比例弁１３を制御し
てガス量を調節することにより、ガスバーナ１４から特
定熱量Ｆｃに対応した燃焼量を発生する。よって、熱交
換器内に滞留する湯および熱交換器自体を高温に保つこ
とができ、給湯再開時の湯温立上がりを迅速化すること
ができる。Thus, in the intermittent combustion control state,
Circulation stop (Jc) information 32 from the circulation stop condition determination unit 32
When a is output, the circulation pump 7 is stopped,
The specific heat amount calculation unit 44 is driven for a predetermined time via the post combustion control unit 51 to select the specific heat amount Fc larger than the correction heat amount F and the proportional combustion mode, and the gas proportional valve 13 is controlled to adjust the gas amount. As a result, a combustion amount corresponding to the specific heat amount Fc is generated from the gas burner 14. Therefore, the hot water staying in the heat exchanger and the heat exchanger itself can be maintained at a high temperature, and the temperature rise of the hot water when restarting hot water supply can be accelerated.
【００５１】また、設定温度Ｔｓが予め記憶されている
所定の温度Ｔｓｋを超える場合には、特定熱量Ｆｃに基
づく燃焼、および循環ポンプ停止後の加熱継続を行わな
いため、熱交換器内の滞留水が加熱されることがない。If the set temperature Ts exceeds a predetermined temperature Tsk stored in advance, the combustion based on the specific heat amount Fc and the continuation of heating after the circulation pump is stopped are not performed. The water is not heated.
【００５２】なお、本実施例では、循環ポンプ停止後の
所定時間、設定時間Ｔｓの湯を得るのに必要な熱量以上
の特定熱量で加熱を継続するよう構成したが、循環停止
条件が成立した場合、加熱および循環ポンプの駆動を所
定時間継続し、この所定時間中は設定温度Ｔｓの湯を得
るのに必要な熱量以上の特定熱量で加熱するよう構成し
てもよい。また、本実施例では、特定熱量に応じて比例
弁の弁開度を制御する構成を取ることにより、熱交換器
内の湯の高温化を実現しているが、特定熱量に応じて間
欠燃焼の燃焼時間を長くする構成を取ることによって
も、熱交換器内の湯の高温化を実現することができる。In this embodiment, the heating is continued at a specific amount of heat equal to or more than the amount of heat required to obtain the hot water for the set time Ts for a predetermined time after the circulation pump is stopped. In this case, the heating and the driving of the circulation pump may be continued for a predetermined time, and during this predetermined time, the heating may be performed with a specific heat amount equal to or more than the heat amount necessary to obtain hot water at the set temperature Ts. In this embodiment, the temperature of the hot water in the heat exchanger is increased by controlling the valve opening of the proportional valve according to the specific calorific value. It is also possible to increase the temperature of the hot water in the heat exchanger by adopting a configuration in which the combustion time is increased.
【００５３】[0053]
【発明の効果】以上説明したようにこの発明に係る循環
式給湯装置は、循環ポンプが停止されると特定熱量に基
づいて加熱部を燃焼制御するので、混合湯温度Ｔｍより
大幅に高い熱交出口温度Ｔｈを得ることができ、循環式
給湯機においてもバイパス付き給湯機の特徴を活かすこ
とができる。As described above, in the circulating hot water supply apparatus according to the present invention, when the circulating pump is stopped, combustion of the heating section is controlled based on a specific amount of heat, so that heat exchange significantly higher than the mixed hot water temperature Tm. The outlet temperature Th can be obtained, and the features of the hot water heater with bypass can be utilized in the circulation type hot water heater.
【００５４】よって、給湯停止状態から給湯状態に移行
しても、給湯開始から所望の温度で多量の湯水を大幅な
アンダーシュートを起こすことなく供給することができ
る。Therefore, even if the state shifts from the hot water supply stop state to the hot water supply state, a large amount of hot water can be supplied at a desired temperature from the start of hot water supply without causing significant undershoot.
【００５５】また、所定温度を超える設定温度が入力さ
れる場合は、特定熱量に基づく燃焼制御および循環ポン
プ停止後の加熱継続を行わない。When a set temperature exceeding the predetermined temperature is input, the combustion control based on the specific amount of heat and the continuation of heating after the circulation pump is stopped are not performed.
【００５６】よって、給湯停止状態に熱交出口温度が必
要以上に上昇するのを抑え、給湯開始時に沸騰した湯が
出るのを防止することができる。Therefore, it is possible to prevent the heat exchange outlet temperature from unnecessarily rising when the hot water supply is stopped, and to prevent the boiling water from flowing out at the start of the hot water supply.
【図１】この発明に係る循環式給湯装置の全体構成図FIG. 1 is an overall configuration diagram of a circulation type hot water supply apparatus according to the present invention.
【図２】発明に係る給湯停止状態における制御手段のブ
ロック構成図FIG. 2 is a block diagram of a control unit in a hot water supply stop state according to the present invention.
１ 循環式給湯装置 ２ 給水管 ３ 熱交換器 ４ 湯水混合部 ５ 給湯管 ６ 給湯栓 ７ 循環ポンプ ８ 戻り管 ９ 循環経路 １０ バイパス管 １１ ガス管 １２ 電磁弁 １３ ガス比例弁 １４ ガスバーナ １５ 給水温度（Ｔｃ）検出部 １６ 水量（Ｑ）検出部 １７ 熱交出口温度（Ｔｈ）検出部 １８ 混合湯温度（Ｔｍ）検出部 １９ 制御手段 ２０ コントローラ操作部 ２０Ａ 保温スイッチ ２０Ｂ 温度設定部 ３０ 循環制御手段 ３１ 循環開始条件判定部 ３２ 循環停止条件判定部 ３３ 循環ポンプ制御部 ４０ 熱量演算手段 ４１ 目標温度設定部 ４２ 必要熱量演算部 ４３ 補正熱量演算部 ４４ 特定熱量演算部 ４５ 熱量選択部 ４６ 比例・間欠モード選択部 ５０ 加熱制御手段 ５１ ポスト燃焼制御部 ５２ 加熱開始・停止条件判断部 ５３ 電磁弁駆動部 ５４ 間欠燃焼周期演算部 ５５ 比例弁制御部 ６０ 混合部制御手段 ６１ 混合弁開度演算部 ６２ 混合弁制御部 DESCRIPTION OF SYMBOLS 1 Circulating hot water supply apparatus 2 Water supply pipe 3 Heat exchanger 4 Hot water mixing part 5 Hot water supply pipe 6 Hot water tap 7 Circulation pump 8 Return pipe 9 Circulation path 10 Bypass pipe 11 Gas pipe 12 Electromagnetic valve 13 Gas proportional valve 14 Gas burner 15 Water supply temperature ( Tc) detecting section 16 water quantity (Q) detecting section 17 heat exchange outlet temperature (Th) detecting section 18 mixed hot water temperature (Tm) detecting section 19 control means 20 controller operating section 20A heat retaining switch 20B temperature setting section 30 circulation control means 31 circulation Start condition determination unit 32 Circulation stop condition determination unit 33 Circulation pump control unit 40 Heat amount calculation means 41 Target temperature setting unit 42 Required heat amount calculation unit 43 Corrected heat amount calculation unit 44 Specific heat amount calculation unit 45 Heat amount selection unit 46 Proportional / intermittent mode selection unit Reference Signs List 50 heating control means 51 post combustion control unit 52 heating start / stop condition judgment unit 53 solenoid valve drive unit 5 Intermittent combustion period calculation portion 55 proportional valve controller 60 mixer control means 61 mixing valve opening calculating section 62 mixing valve controller
フロントページの続き (72)発明者 中野 清隆 兵庫県神戸市東灘区魚崎浜町43番１号 日本ユプロ株式会社内 (72)発明者 高田 哲朗 兵庫県神戸市東灘区魚崎浜町43番１号 日本ユプロ株式会社内 (56)参考文献 特開 平５−60337（ＪＰ，Ａ) 実開 平３−13061（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F24H 1/10 302 Continuation of the front page (72) Inventor Kiyotaka Nakano 431-1 Uozakihama-cho, Higashinada-ku, Kobe-city, Hyogo Prefecture Inside (72) Inventor Tetsuro Takada 43-1, Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Japan Nippon Yupro Stock In-house (56) References JP-A-5-60337 (JP, A) JP-A-3-13061 (JP, U) (58) Fields investigated (Int. Cl. 7 , DB name) F24H 1/10 302
Claims (4)
湯管と、この給湯管と混合部で接続され前記給水管と分
岐部で接続されたバイパス管と、前記熱交換器を通過す
る湯と前記バイパス管を通過する水の混合比率を制御す
る混合部と、前記混合部より下流の前記給湯管と前記分
岐部より上流の前記給水管に接続された戻り管と、この
戻り管を介して前記給湯管の湯を前記給水管に送出する
循環ポンプと、前記熱交換器を加熱する加熱部と、前記
循環ポンプ停止後も前記加熱部による加熱を継続させる
加熱制御部を備えたことを特徴とする循環式給湯装置。1. A hot water supply pipe connected to a water supply pipe via a heat exchanger, a bypass pipe connected to the hot water supply pipe at a mixing section and connected to the water supply pipe at a branch section, and passing through the heat exchanger. A mixing section for controlling a mixing ratio of hot water to be supplied and water passing through the bypass pipe; a return pipe connected to the water supply pipe downstream of the mixing section and the water supply pipe upstream of the branch section; A circulating pump that feeds hot water from the hot water supply pipe to the water supply pipe via a heating unit that heats the heat exchanger, and a heating control unit that continues heating by the heating unit even after the circulation pump is stopped. A circulation type hot water supply device characterized by the above-mentioned.
湯管と、この給湯管と混合部で接続され前記給水管と分
岐部で接続されたバイパス管と、前記熱交換器を通過す
る湯と前記バイパス管を通過する水の混合比率を制御す
る混合部と、前記混合部より下流の前記給湯管と前記分
岐部より上流の前記給水管に接続された戻り管と、この
戻り管を介して前記給湯管の湯を前記給水管に送出する
ポンプと、前記熱交換器を加熱する加熱部と、前記混合
部より下流の前記給湯管の湯の設定温度を出力する温度
設定部と、前記給湯管を通過する湯の温度を前記設定温
度に維持するための必要熱量を算出する必要熱量演算部
とを備え、この必要熱量に基づき前記加熱部の加熱量を
制御する循環式給湯装置において、 前記循環ポンプの停止条件を判断する循環停止条件判断
部と、この循環停止条件判断部の出力に基づき前記加熱
部の加熱量を前記必要熱量より大きい熱量に制御する加
熱制御部とを備えたことを特徴とする循環式給湯装置。2. A hot water supply pipe connected to a water supply pipe via a heat exchanger, a bypass pipe connected to the hot water supply pipe at a mixing section and connected to the water supply pipe at a branch section, and passing through the heat exchanger. A mixing section for controlling a mixing ratio of hot water to be supplied and water passing through the bypass pipe; a return pipe connected to the water supply pipe downstream of the mixing section and the water supply pipe upstream of the branch section; A pump that feeds the hot water from the hot water supply pipe to the hot water supply pipe, a heating unit that heats the heat exchanger, and a temperature setting unit that outputs a set temperature of the hot water in the hot water supply pipe downstream from the mixing unit. A required calorie calculation unit for calculating a required calorie for maintaining a temperature of hot water passing through the hot water supply pipe at the set temperature, and a circulating hot water supply device for controlling a heating amount of the heating unit based on the required calorie. In the determination of the stop condition of the circulation pump A ring stop condition determination unit, circulating water heater characterized by comprising a heating control unit that controls a large amount of heat than the heat requirements of the heating amount of the heating portion based on the output of the circulation stop condition determination unit.
温度以上の場合、前記加熱部による前記循環ポンプ停止
後の加熱継続を行わさせないことを特徴とする請求項１
記載の循環式給湯装置。3. The heating control unit according to claim 1, wherein when the set temperature is equal to or higher than a predetermined temperature, the heating unit does not allow the heating unit to continue heating after the circulation pump is stopped.
The circulation type hot water supply device as described.
温度以上の場合、前記循環停止条件判断部の出力にかか
わらず前記加熱部の加熱量を前記必要熱量に制御するこ
とを特徴とする請求項２記載の循環式給湯装置。4. The heating control unit controls the heating amount of the heating unit to the required heat amount regardless of an output of the circulation stop condition determining unit when the set temperature is equal to or higher than a predetermined temperature. The circulation type hot water supply device according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03839793A JP3144605B2 (en) | 1993-02-26 | 1993-02-26 | Circulating water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03839793A JP3144605B2 (en) | 1993-02-26 | 1993-02-26 | Circulating water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06249506A JPH06249506A (en) | 1994-09-06 |
| JP3144605B2 true JP3144605B2 (en) | 2001-03-12 |
Family
ID=12524160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03839793A Expired - Fee Related JP3144605B2 (en) | 1993-02-26 | 1993-02-26 | Circulating water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3144605B2 (en) |
-
1993
- 1993-02-26 JP JP03839793A patent/JP3144605B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06249506A (en) | 1994-09-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001214 |
|
| LAPS | Cancellation because of no payment of annual fees |