JPH11337103A - Circulating and heat retaining type hot-water supplier - Google Patents
Circulating and heat retaining type hot-water supplierInfo
- Publication number
- JPH11337103A JPH11337103A JP8463699A JP8463699A JPH11337103A JP H11337103 A JPH11337103 A JP H11337103A JP 8463699 A JP8463699 A JP 8463699A JP 8463699 A JP8463699 A JP 8463699A JP H11337103 A JPH11337103 A JP H11337103A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- water
- hot
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、熱交換器で加熱さ
れた湯と給水管路の水とを混合弁で混合する給湯装置に
接続された給湯管路を再度、前記給湯装置に接続するこ
とで循環路を形成し、この循環路内に循環ポンプを介設
した循環保温式給湯装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply pipe connected to a hot water supply apparatus for mixing hot water heated by a heat exchanger and water in a water supply pipe with a mixing valve, and is connected to the hot water supply apparatus again. Thus, the present invention relates to a circulating hot water supply apparatus in which a circulation path is formed, and a circulation pump is provided in the circulation path.
【０００２】[0002]
【従来の技術】給湯管路の末端部と熱交換器の入水側と
を戻り管路で接続して循環路を形成し、戻り管路等に介
設した循環ポンプを運転して循環路内の湯水を循環させ
ながら、循環路中の適所に設けた温度センサで循環路内
の湯温を検出し、検出した湯温が設定温度よりも低温で
あれば熱交換器で加熱し、設定温度に達すれば加熱を停
止することで、循環路内の湯水を適温に保ち、給湯管路
に接続された給湯栓から適温の湯水を速やかに出湯でき
るようにした循環保温式の給湯装置は知られている。2. Description of the Related Art A circulation path is formed by connecting a terminal end of a hot water supply pipe and an inlet side of a heat exchanger with a return pipe, and a circulation pump provided in the return pipe or the like is operated to operate the circulation pump. While circulating hot and cold water, the temperature of the hot water in the circulation path is detected by a temperature sensor provided at an appropriate position in the circulation path, and if the detected hot water temperature is lower than the set temperature, heating is performed by a heat exchanger. A circulation warming type hot water supply device is known in which heating is stopped when the temperature reaches a predetermined value, thereby maintaining the temperature of the hot water in the circulation path at an appropriate temperature, so that hot water at an appropriate temperature can be quickly discharged from a hot water tap connected to a hot water supply pipe. ing.
【０００３】また、給湯装置の熱交換器をバイパスして
給水管と給湯管を接続するバイパス管と、バイパス管と
熱交換器の出口および給湯管を混合弁で接続し、熱交換
器で加熱された湯とバイパス管を通過する水とを混合弁
で所定の混合比率で混合して設定温度の湯を給湯管路に
供給するバイパス混合式の給湯装置も知られている。In addition, a bypass pipe that connects a water supply pipe to a hot water supply pipe by bypassing a heat exchanger of a hot water supply apparatus, and a bypass valve, an outlet of the heat exchanger, and a hot water supply pipe are connected by a mixing valve, and heated by the heat exchanger. There is also known a bypass mixing type hot water supply apparatus for mixing hot water and water passing through a bypass pipe at a predetermined mixing ratio with a mixing valve to supply hot water at a set temperature to a hot water supply pipe line.
【０００４】このようなバイパス混合式給湯装置は、熱
交換器で加熱された高温の湯とバイパス管からの水とを
混合して設定温度の湯を給湯管路に供給するため出湯温
度の変動が少ない。また、給湯管路に接続された給湯栓
閉後の再出湯時には、給湯装置に流入した水が熱交換器
で加熱されるまでの間、熱交換器内に蓄えられた高温の
湯と給湯装置に流入した水とを混合して設定温度の湯を
給湯管路に供給するため再出湯時における出湯温度の変
動を少なくしている。[0004] Such a bypass mixing type hot water supply apparatus mixes high-temperature hot water heated by a heat exchanger and water from a bypass pipe to supply hot water at a set temperature to a hot-water supply pipe line, so that the temperature of the hot water supply varies. Less is. In addition, at the time of re-watering after the hot-water tap connected to the hot-water supply pipe is closed, the high-temperature hot water stored in the heat exchanger and the hot-water supply device until the water flowing into the hot-water supply device is heated by the heat exchanger. In order to supply the hot water at the set temperature to the hot water supply line by mixing with the water flowing into the hot water supply line, the fluctuation of the hot water temperature at the time of re-water supply is reduced.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、循環保
温式の給湯装置とバイパス混合式の給湯装置を組み合わ
せると循環保温運転後、混合弁があるにも関わらず、給
湯管路に接続された給湯栓からの出湯温度が変動する場
合がある。However, when a circulating hot water supply device and a bypass mixing type hot water supply device are combined, a hot water tap connected to a hot water supply pipe despite the presence of a mixing valve after the circulating hot water operation. There is a case where the temperature of the hot water from the water varies.
【０００６】これは、バイパス混合式給湯装置が熱交換
器の出口温度Ｔｈ、戻り（給水）温度Ｔｃおよび給湯温
度Ｔｍをそれぞれ検出する温度センサを設け、これらの
検出された温度Ｔｈ、Ｔｃ、Ｔｍと設定温度Ｔｓに基づ
いて混合弁の湯と水の混合比率を演算し、この混合比率
に対応して混合弁の弁開度を調節するように構成されて
いるからであり、循環保温運転によって、戻り温度Ｔｃ
が高くなれば熱交換器の出口温度Ｔｈを下げるしかなく
Ｔｃ≒ＴｓとなったときＴｈ≒Ｔｃとなり、もはや混合
弁は意味をなさず、この状態の時、給湯管路に接続され
た給湯栓から出湯されると、給湯装置に流入した水が熱
交換器で加熱されるまでの間、設定温度の湯と給湯装置
に流入した水が混合弁で混合されるため出湯温度は設定
温度よりも大幅に低下する。[0006] This is because the bypass mixing type hot water supply apparatus is provided with temperature sensors for detecting the outlet temperature Th, return (water supply) temperature Tc and hot water temperature Tm of the heat exchanger, respectively, and the detected temperatures Th, Tc, Tm are provided. And the set temperature Ts to calculate the mixing ratio of hot water and water of the mixing valve, and to adjust the valve opening of the mixing valve in accordance with the mixing ratio. , Return temperature Tc
Rises, the outlet temperature Th of the heat exchanger must be reduced, and when Tc ≒ Ts, Th ≒ Tc, and the mixing valve no longer makes sense. In this state, the hot water tap connected to the hot water supply line When the hot water is discharged from the hot water supply device, the hot water at the set temperature and the water flowing into the hot water supply device are mixed by the mixing valve until the water flowing into the hot water supply device is heated by the heat exchanger. It drops significantly.
【０００７】本発明は、上記課題を解決するためになさ
れたもので、本発明の目的は、循環保温運転後の出湯時
に出湯温度の変化の少ない循環保温式給湯装置を提供す
ることにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a circulating heat retaining type hot water supply apparatus in which the temperature of a tapping water changes little during tapping after a circulating heat retaining operation.
【０００８】[0008]
【課題を解決するための手段及びその作用・効果】上記
目的を達成するために請求項１は、熱交換器で加熱され
た湯と給水管路の水とを混合弁で混合する給湯装置に接
続された給湯管路を再度、前記給湯装置に接続すること
で循環路を形成し、この循環路内に循環ポンプを介設し
た循環保温式給湯装置において、給湯用の熱交換器と、
循環保温用の熱交換器とを別々に設けたことにより、循
環保温運転中、戻り温度の上昇によって給湯用の熱交換
器内の湯温低下がなく、高温の湯を蓄えることができる
ので循環保温運転後の出湯時に給湯装置に流入した水が
給湯用の熱交換器で加熱されるまでの間、給湯用の熱交
換器内に蓄えられた高温の湯と給湯装置に流入した水と
を混合弁で混合することで出湯温度の変化を少なくする
ことができる。To achieve the above object, a first aspect of the present invention is to provide a hot water supply apparatus for mixing hot water heated by a heat exchanger and water in a water supply pipe with a mixing valve. The connected hot water supply pipe line is again connected to the hot water supply device to form a circulation path, and in a circulating heat retaining type hot water supply apparatus having a circulation pump interposed in the circulation path, a heat exchanger for hot water supply,
Since the heat exchanger for circulating heat retention is provided separately, the temperature of the hot water in the heat exchanger for hot water supply does not drop due to an increase in the return temperature during the circulating heat retaining operation, and high-temperature hot water can be stored. Until the water that has flowed into the hot water supply device at the time of tapping after the heat retention operation is heated by the hot water supply heat exchanger, the hot water stored in the hot water supply heat exchanger and the water that has flowed into the hot water supply device are mixed. Mixing with a mixing valve can reduce the change in tapping temperature.
【０００９】請求項２は、給湯用の熱交換器と、循環保
温用の熱交換器とを共通の加熱部で加熱することによ
り、循環保温運転中、給湯用の熱交換器も加熱されるの
で放熱による給湯用の熱交換器内の湯温低下もなく、高
温の湯を蓄えることができるので循環保温運転後の出湯
時に給湯装置に流入した水が給湯用の熱交換器で加熱さ
れるまでの間、給湯用の熱交換器内に蓄えられた高温の
湯と給湯装置に流入した水とを混合弁で混合することで
出湯温度の変化を少なくすることができる。According to a second aspect of the invention, the heat exchanger for hot water supply and the heat exchanger for circulating heat retention are heated by a common heating unit, so that the heat exchanger for hot water supply is also heated during the circulating heat retention operation. Therefore, the temperature of the hot water in the heat exchanger for hot water supply does not decrease due to heat radiation, and high-temperature hot water can be stored. Therefore, the water flowing into the hot water supply device at the time of tapping after the circulation warming operation is heated by the heat exchanger for hot water supply. Until the hot water stored in the hot water supply heat exchanger is mixed with the water flowing into the hot water supply device by the mixing valve, the change in the tapping temperature can be reduced.
【００１０】請求項３は、循環保温運転で循環路内の湯
水が体積膨張し、循環路内の内圧が上昇するため給湯装
置、給湯管路や給湯栓が破損する場合があり、膨張水を
処理する膨張水処理装置を給湯装置内に設けることで給
湯装置、給湯管路や給湯栓を破損させることなく循環保
温運転が行え、戻り温度の上昇によって給湯用の熱交換
器内の湯温低下がなく、高温の湯を蓄えることができる
ので循環保温運転後の出湯時に給湯装置に流入した水が
給湯用の熱交換器で加熱されるまでの間、給湯用の熱交
換器内に蓄えられた高温の湯と給湯装置に流入した水と
を混合弁で混合することで出湯温度の変化を少なくする
ことができる。According to a third aspect of the present invention, the hot water in the circulation path expands in volume during the circulation warming operation, and the internal pressure in the circulation path increases, which may damage the hot water supply device, the hot water supply pipe and the hot water tap. By installing the expansion water treatment device to be treated in the hot water supply device, it is possible to perform a circulating heat retention operation without damaging the hot water supply device, the hot water supply pipeline and the hot water tap, and a drop in the hot water temperature in the heat exchanger for hot water supply due to an increase in the return temperature. The hot water can be stored in the heat exchanger for hot water supply until the water flowing into the water heater at the time of tapping after the circulation warming operation is heated by the heat exchanger for hot water supply. By mixing the high-temperature hot water and the water flowing into the hot water supply device with a mixing valve, a change in the tapping temperature can be reduced.
【００１１】請求項４は、循環保温中に器具から循環保
温用管路出て行く湯温を、循環保温用の熱交換器から出
た高温の湯と循環保温用の熱交換器をバイパスした湯の
混合された湯の温度にできることから、給湯を使用して
給湯用の熱交換器が高温になり共通の加熱部で加熱され
る循環保温用の熱交換器も高温になったときでも循環保
温用管路内の湯温が高温になる。According to a fourth aspect of the present invention, the temperature of the hot water flowing out of the circulating heat retaining pipe from the appliance during the circulating heat retaining is bypassed to the high-temperature hot water discharged from the circulating warming heat exchanger and the circulating warming heat exchanger. Because the temperature of the hot water mixed with the hot water can be adjusted, the heat exchanger for hot water supply becomes hot using hot water, and the heat exchanger for circulating heat is heated by the common heating unit. The temperature of hot water in the heat retention pipe becomes high.
【００１２】請求項５は、循環保温中の循環保温用管路
内の湯温を、循環保温用の熱交換器を通る水量とバイパ
スする管路を通る水量の比を可変とすることにより、出
側湯温を高温に保ったまま任意の温度にすることができ
る。これにより循環停止中に給湯を使用したときなど循
環保温用の熱交換器内の湯温が高温になった状態で循環
を開始したときに循環配管内に高温の湯が流れて水栓を
開けた人がやけどしたりする危険を防止できる。According to a fifth aspect of the present invention, the temperature of the hot water in the circulation heat-retaining pipe during the circulation heat-retention is made variable by changing the ratio of the amount of water passing through the heat exchanger for circulating-heating and the amount of water passing through the bypass pipe. Any temperature can be set while keeping the outlet water temperature high. This allows hot water to flow through the circulation pipes and open the faucet when circulation starts when the temperature of the water in the heat exchanger for maintaining circulation is high, such as when hot water is used while circulation is stopped. Can prevent the risk of burns.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を、図
面により詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１４】図１は、本発明の一実施形態が係る循環保
温式給湯装置をガス給湯器に適用したブロック図であ
る。FIG. 1 is a block diagram in which a circulating hot water supply apparatus according to one embodiment of the present invention is applied to a gas water heater.
【００１５】上記ガス給湯器は図示のように、給水管路
２から給湯器本体１内に水を供給するための給水管３、
および給湯器本体１内で加熱された水を給湯用の熱交換
器４を介して給湯栓７に供給するための給湯管５で構成
されている。さらに、給湯器本体１内の給水管３から分
岐し、給湯用の熱交換器４を介さずに給湯管５に接続さ
れたバイパス管８と、バイパス管８と給湯管５の合流部
には給湯用の熱交換器４で加熱された湯と、バイパス管
８から送られてきた水を指令パルスに基づき駆動するス
テッピングモータＭにより混合制御する混合弁９が備え
られている。As shown, the gas water heater includes a water supply pipe 3 for supplying water from the water supply pipe 2 into the water heater main body 1.
And a hot water supply pipe 5 for supplying water heated in the water heater main body 1 to a hot water tap 7 via a hot water supply heat exchanger 4. Further, a bypass pipe 8 branched from the water supply pipe 3 in the water heater main body 1 and connected to the hot water supply pipe 5 without passing through the heat exchanger 4 for hot water supply, and a junction of the bypass pipe 8 and the hot water supply pipe 5 are provided. A mixing valve 9 is provided for mixing and controlling the hot water heated by the hot water supply heat exchanger 4 and the water sent from the bypass pipe 8 by a stepping motor M driven based on a command pulse.
【００１６】また、給水管３には、給水管路２からの水
の温度Ｔｃを検出する入水温度センサ１０、および水の
量Ｑ１を検出する水量センサ１１、給湯管５の混合弁９
よりも上流側には、給湯用の熱交換器４出口の温度Ｔｈ
を検出する熱交換器出口温度センサ１２、混合弁９より
も下流側には、混合された後の給湯温度Ｔｍを検出する
給湯温度センサ１３が備えられている。The water supply pipe 3 has an incoming water temperature sensor 10 for detecting the temperature Tc of water from the water supply pipe 2, a water amount sensor 11 for detecting the amount of water Q1, and a mixing valve 9 for the hot water supply pipe 5.
More upstream, the temperature Th at the outlet of the heat exchanger 4 for hot water supply
And a hot water supply temperature sensor 13 for detecting the mixed hot water supply temperature Tm downstream of the mixing valve 9.
【００１７】また、給湯器本体１内には、燃焼するのに
必要な空気を供給するためのファン１４をも備える。さ
らにバーナ１８の上部には着火する際に必要なイグナイ
タ１９、火炎の有無を検出するフレームロッド２０が設
けられている。また、バーナ１８にガスを供給するため
のガス供給管１５が設けられ、ガス供給管１５には供給
するガス量を可変するための比例弁１７およびガスの供
給を開始／停止するための電磁弁１６がそれぞれ備えら
れている。The water heater body 1 also has a fan 14 for supplying air required for combustion. Further, an igniter 19 necessary for ignition and a frame rod 20 for detecting the presence or absence of a flame are provided above the burner 18. A gas supply pipe 15 for supplying gas to the burner 18 is provided. The gas supply pipe 15 has a proportional valve 17 for varying the amount of gas to be supplied and an electromagnetic valve for starting / stopping gas supply. 16 are provided.
【００１８】一方、給湯器本体１内で加熱された水を給
湯栓７に供給するための給湯管路６は再度、給湯器本体
１に接続されており、給湯管路６から給湯器本体１内に
湯水を戻すための戻り管２１、および戻された湯水を加
熱するための循環保温用の熱交換器２２を介して混合弁
９よりも下流側で給湯温度センサ１３よりも上流側の給
湯管５に接続される往き管２３により循環路を形成して
いる。On the other hand, the hot-water supply line 6 for supplying the water heated in the hot-water supply body 1 to the hot-water tap 7 is again connected to the hot-water supply main body 1, and the hot-water supply line 1 Hot water downstream of the mixing valve 9 and upstream of the hot water supply temperature sensor 13 via a return pipe 21 for returning hot and cold water to the inside and a heat exchanger 22 for circulating and maintaining the returned hot and cold water. A circulation path is formed by the outgoing pipe 23 connected to the pipe 5.
【００１９】また、戻り管２１には、循環路内の湯水を
循環させるためのポンプＰ、給湯管路６からの湯水の温
度Ｔｂを検出する戻り温度センサ２４、循環量Ｑ２を検
出する水量センサ２５、および循環路内の膨張水を処理
する膨張水処理装置２６が備えられている。The return pipe 21 has a pump P for circulating hot water in the circulation path, a return temperature sensor 24 for detecting the temperature Tb of hot water from the hot water supply pipe 6, and a water quantity sensor for detecting the circulation amount Q2. 25, and an expansion water treatment device 26 for processing expansion water in the circulation path.
【００２０】さらに、循環路内の湯水が給水管路２に流
れ込まないように給水管路２と給水管３の接続部には逆
止弁２７を設け、給湯管５からの湯が循環保温用の熱交
換器２２に流れ込まないように給湯管路６と戻り管２１
の接合部には逆止弁２８を設けている。Further, a check valve 27 is provided at a connection portion between the water supply pipe 2 and the water supply pipe 3 so that hot water in the circulation path does not flow into the water supply pipe 2, and the hot water from the hot water supply pipe 5 is used for circulating and warming. Hot water supply line 6 and return pipe 21 so as not to flow into heat exchanger 22
A check valve 28 is provided at the junction.
【００２１】また、リモコン２９には、運転スイッチ３
０、給湯栓７から供給される湯温の設定温度Ｔｓを設定
する温度設定スイッチ３１、循環保温運転をする際にオ
ン操作する循環保温運転スイッチ３２、設定温度Ｔｓ等
を表示する表示部３３を備える。The remote control 29 includes an operation switch 3
0, a temperature setting switch 31 for setting a set temperature Ts of hot water supplied from the hot-water tap 7, a circulating warming operation switch 32 that is turned on when performing the circulating warming operation, and a display unit 33 for displaying the set temperature Ts and the like. Prepare.
【００２２】上記ガス給湯器はさらに、上記各センサ１
０、１１、１２、１３、２４、２５および温度設定スイ
ッチ３１からの検出信号（Ｔｃ、Ｑ１、Ｔｈ、Ｔｍ、Ｔ
ｂ、Ｑ２、Ｔｓ）に基づき、比例弁１７、電磁弁１６、
ファン１４、混合弁９等の制御を行う制御部３４をも備
える。The gas water heater is further provided with each of the sensors 1
0, 11, 12, 13, 24, 25 and detection signals (Tc, Q1, Th, Tm, Tm) from the temperature setting switch 31.
b, Q2, Ts), the proportional valve 17, the solenoid valve 16,
A control unit 34 for controlling the fan 14, the mixing valve 9, and the like is also provided.
【００２３】給湯栓７が開けられた給湯状態では、給水
管路２から給湯器本体１内の給水管３に流入する水を水
量センサ１１が水の量Ｑ１を、入水温度センサ１０が水
の温度Ｔｃを検出し、設定温度Ｔｓから必要熱量を制御
部３４で計算する。その後、ファン１４、イグナイタ１
９が作動し、電磁弁１６が開くことで、ガス供給管１５
から供給されるガスの量を比例弁１７で必要熱量に調整
し、燃焼が開始される。In the hot-water supply state in which the hot-water tap 7 is opened, the water flowing into the water supply pipe 3 in the water heater main body 1 from the water supply pipe 2 is supplied by the water amount sensor 11 to the water amount Q1, and the incoming water temperature sensor 10 to the water supply temperature sensor 10. The temperature Tc is detected, and the control unit 34 calculates the required amount of heat from the set temperature Ts. After that, fan 14, igniter 1
9 is operated and the solenoid valve 16 is opened, whereby the gas supply pipe 15 is opened.
The amount of gas supplied from is adjusted to the required amount of heat by the proportional valve 17, and combustion is started.
【００２４】次に、熱交換器出口温度センサ１２で給湯
用の熱交換器４の出口温度Ｔｈを検出し、Ｔｈが高温に
なるように燃焼量と混合弁９を制御部３４に基づき制御
を行い、給湯用の熱交換器４で加熱された高温の湯とバ
イパス管８から送られてきた水とを混合弁９で混合し、
設定温度Ｔｓの湯を給湯栓７に供給する。Next, the outlet temperature Th of the heat exchanger 4 for hot water supply is detected by the heat exchanger outlet temperature sensor 12, and the combustion amount and the mixing valve 9 are controlled based on the control unit 34 so that Th becomes high. Then, the hot water heated by the heat exchanger 4 for hot water supply and the water sent from the bypass pipe 8 are mixed by the mixing valve 9,
Hot water at the set temperature Ts is supplied to the hot water tap 7.
【００２５】ここで、給湯用の熱交換器４内に燃焼が開
始される前から高温の湯が蓄えられていれば、給湯栓７
を開くと同時に給湯用の熱交換器４内で蓄えられた高温
の湯とバイパス管８から送られてきた水とを混合弁９で
混合し、設定温度Ｔｓの湯を給湯栓７に供給することが
できるので、給湯栓７からの出湯温度に変動が少ない。If hot water is stored in the hot water supply heat exchanger 4 before the start of combustion, the hot water tap 7
At the same time, the hot water stored in the heat exchanger 4 for hot water supply and the water sent from the bypass pipe 8 are mixed by the mixing valve 9, and the hot water at the set temperature Ts is supplied to the hot water tap 7. Therefore, the temperature of the hot water from the hot-water tap 7 does not vary much.
【００２６】また、給湯栓７が閉じられた非給湯状態で
は、戻り管２１に備えられたポンプＰが作動し、水量セ
ンサ２５が循環量Ｑ２を、戻り温度センサ２４が給湯管
路６からの湯水の温度Ｔｂを検出し、設定温度Ｔｓから
必要熱量を制御部３４で計算する。その後、ファン１
４、イグナイタ１９が作動し、電磁弁１６が開くこと
で、ガス供給管１５から供給されるガスの量を比例弁１
７で必要熱量に調整し、燃焼が開始され、設定温度Ｔｓ
の湯を給湯管路６に供給し、循環させる。Ｔｂ≒Ｔｓと
なるか、給湯栓が開かれて給湯器本体１内の給水管３に
流入する水を水量センサ１１が水の量Ｑ１を検出したと
き、ポンプＰが停止し、循環保温運転は終了する。In the non-hot water supply state in which the hot water tap 7 is closed, the pump P provided in the return pipe 21 operates, the water quantity sensor 25 determines the circulation amount Q2, and the return temperature sensor 24 controls the flow rate from the hot water supply pipe 6 to the return pipe 21. The temperature Tb of the hot and cold water is detected, and the control unit 34 calculates the required amount of heat from the set temperature Ts. Then fan 1
4. When the igniter 19 is operated and the solenoid valve 16 is opened, the amount of gas supplied from the gas supply pipe 15 is reduced by the proportional valve 1.
7, the temperature is adjusted to the required amount of heat, combustion is started, and the set temperature Ts
Hot water is supplied to the hot water supply pipe 6 and circulated. When Tb ≒ Ts or when the water tap is opened and the water flow sensor 11 detects the amount of water Q1 of the water flowing into the water supply pipe 3 in the water heater main body 1, the pump P is stopped, and the circulation warming operation is started. finish.
【００２７】ここで、給湯器本体１は、給湯用の熱交換
器４と循環保温用の熱交換器２２とを共通のバーナ１８
で加熱しており、給湯栓７が閉じられた非給湯状態でも
循環保温運転が開始され、循環保温用の熱交換器２２が
加熱されれば、給湯用の熱交換器４も加熱され、高温の
湯を給湯用の熱交換器４内に蓄えることができるので、
給湯栓７が開かれても、給湯栓７を開くと同時に給湯用
の熱交換器４内で蓄えられた高温の湯とバイパス管８か
ら送られてきた水とを混合弁９で混合し、設定温度Ｔｓ
の湯を給湯栓７に供給することができるので、給湯栓７
からの出湯温度に変動を少なくすることができる。Here, the water heater main body 1 uses the heat exchanger 4 for hot water supply and the heat exchanger 22 for circulating heat retention in a common burner 18.
In the non-hot-water supply state in which the hot-water tap 7 is closed, the circulation heat retention operation is started, and when the heat exchanger 22 for circulation heat retention is heated, the heat exchanger 4 for hot water supply is also heated, and Hot water can be stored in the heat exchanger 4 for hot water supply,
Even when the hot water tap 7 is opened, the hot water stored in the hot water supply heat exchanger 4 and the water sent from the bypass pipe 8 are mixed by the mixing valve 9 at the same time as the hot water tap 7 is opened. Set temperature Ts
Hot water can be supplied to the hot water tap 7,
Fluctuation in the temperature of hot water from the furnace can be reduced.
【００２８】図２、図３は、本発明の一実施形態が係る
熱交換器のフィン断面を示す図である。FIGS. 2 and 3 are views showing a fin cross section of a heat exchanger according to an embodiment of the present invention.
【００２９】給湯用の熱交換器と循環保温用の熱交換器
は同一フィンに構成されており、下側の給湯用のパイプ
と循環保温用のパイプは、ろう付けされている。The heat exchanger for hot water supply and the heat exchanger for circulating heat are formed in the same fin, and the lower hot water supply pipe and the circulating heat maintaining pipe are brazed.
【００３０】図２が示すように、給湯栓使用時には、給
湯用のパイプが循環保温用のパイプに入った熱を熱伝達
によって吸収し、循環保温用のパイプ内を空焚きさせな
い構造になっている。As shown in FIG. 2, when the hot-water tap is used, the hot-water supply pipe has a structure in which the heat entering the circulating heat-keeping pipe is absorbed by heat transfer, so that the inside of the circulating-heat keeping pipe is not heated. I have.
【００３１】また、図３が示すように、循環保温運転時
には、循環保温用のパイプが給湯用のパイプに入った熱
を熱伝達によって吸収する。設定温度Ｔｓの湯を循環さ
せるために燃焼量は戻り温度Ｔｂが高くなるにつれて小
さくなり、給湯用のパイプ内の湯は約８５℃に保たれ、
空焚きすることはない。Further, as shown in FIG. 3, during the circulation heat retention operation, the circulation heat retention pipe absorbs the heat entering the hot water supply pipe by heat transfer. In order to circulate the hot water at the set temperature Ts, the amount of combustion decreases as the return temperature Tb increases, and the hot water in the hot water supply pipe is maintained at about 85 ° C.
There is no empty burning.
【００３２】図４は、本発明の一実施形態が係る膨張水
処理装置の構成図である。FIG. 4 is a configuration diagram of an expanded water treatment apparatus according to an embodiment of the present invention.
【００３３】膨張水処理装置は図１で示す給湯器本体１
内の戻り管２１に接続されており、その内部で空気の層
と水の層をダイヤフラムが仕切り、循環路内に発生した
膨張水を一旦吸収することで、循環路内の内圧上昇を防
ぐ。膨張水を吸収していない状態で、膨張水処理装置内
の内圧を給水圧程度にしていれば、膨張水を吸収した
後、循環路内の湯水の温度が低下するか、給湯栓が開か
れた際に、膨張水を循環路内に戻すことができる。The expansion water treatment apparatus is a water heater main body 1 shown in FIG.
Is connected to a return pipe 21 inside, and a diaphragm separates a layer of air and a layer of water inside the pipe, and temporarily absorbs expansion water generated in the circulation path, thereby preventing an increase in internal pressure in the circulation path. If the internal pressure in the expansion water treatment device is set to about the feed water pressure in a state where the expansion water is not absorbed, after absorbing the expansion water, the temperature of the hot water in the circulation path decreases or the hot water tap is opened. In this case, the expansion water can be returned to the circulation path.
【００３４】また、膨張水の排水処理ができる場合は、
膨張水処理装置に排水口を設けて、排水口と配水管を接
続し、給湯器本体外に膨張水を排出することもできる。If the expanded water can be drained,
A drain port may be provided in the expansion water treatment apparatus, and the drain port and the water distribution pipe may be connected to discharge the expansion water outside the water heater main body.
【００３５】図５は請求項４に関わる循環保温式給湯装
置をガス給湯器に適用したブロック図である。上記ガス
給湯器は図示のように、図１で示した例に給湯管路６か
ら給湯器本体１内に湯水を戻すための戻り管２１と給湯
管５に接続される往き管２３の間を循環保温用の熱交換
器２２を通さずバイパスする循環保温用バイパス管３６
を持つ。FIG. 5 is a block diagram in which the circulating heat retaining type hot water supply device according to claim 4 is applied to a gas water heater. As shown in the drawing, the gas water heater has a structure in which a return pipe 21 for returning hot water from the hot water supply pipe line 6 into the water heater main body 1 and an outgoing pipe 23 connected to the hot water supply pipe 5 are provided in the example shown in FIG. Circulating heat retaining bypass pipe 36 which bypasses without passing through circulating heat retaining heat exchanger 22
have.
【００３６】前記例のとおり給湯使用時は、給湯栓７か
らの出湯温度の変動を少なくするため熱交換器に高温の
湯を蓄えるようになっているため、共通の加熱部で加熱
される循環保温用の熱交換器内の湯も特に循環停止中の
給湯使用時には同様に高温になる。循環開始時にこの高
温の湯が給湯管路６に流れ出たタイミングで給湯栓７を
開けるとやけどなどの危険があるが、本構成では循環保
温用の熱交換器内の湯が熱交換器をとおっていない湯と
混合されるため湯温が下がり危険がなくなる。As described above, when hot water is used, high-temperature hot water is stored in the heat exchanger in order to reduce fluctuations in the temperature of hot water from the hot-water tap 7, so that circulation is performed by a common heating unit. The temperature of the hot water in the heat exchanger for keeping heat also becomes high similarly when the hot water is used while the circulation is stopped. If the hot water tap 7 is opened at the timing when the high-temperature hot water flows into the hot-water supply line 6 at the start of circulation, there is a danger of burns or the like, but in this configuration, the hot water in the heat exchanger for circulating heat retention passes through the heat exchanger. Since the water is mixed with hot water, the temperature of the water drops and the danger disappears.
【００３７】図６は請求項５に関わる循環保温式給湯装
置をガス給湯器に適用したブロック図である。上記ガス
給湯器は図示のように、図５で示した例の給湯器の循環
保温用バイパス管３６と循環保温用の熱交換器２２の出
側配管との交点に循環保温用混合弁３７を持つ。FIG. 6 is a block diagram in which the circulating heat retaining type hot water supply device according to claim 5 is applied to a gas water heater. As shown in the figure, the gas water heater is provided with a circulation heat retention mixing valve 37 at the intersection of the circulation heat retention bypass pipe 36 and the outlet pipe of the circulation heat retention heat exchanger 22 of the water heater shown in FIG. Have.
【００３８】循環路内の湯水を循環させるためのポンプ
Ｐを運転し始めた直後など戻り温度センサ２４で検出さ
れる湯温が設定温度より低いときは、循環保温用混合弁
３７は主として熱交換器出側の方を開き給湯温度センサ
１３で検出される湯温が設定温度になるよう混合比率を
調整する。戻り温度センサ２４で検出される湯温が設定
温度に近づくと熱交換器出側の方を絞り設定温度を維持
する。これにより、使用者がいつ給湯栓を開いても設定
温度の湯が供給される。When the temperature of the hot water detected by the return temperature sensor 24 is lower than the set temperature, for example, immediately after the operation of the pump P for circulating the hot water in the circulation path is started, the circulating heat retaining mixing valve 37 is mainly used for heat exchange. The outlet side is opened and the mixing ratio is adjusted so that the hot water temperature detected by the hot water supply temperature sensor 13 becomes the set temperature. When the hot water temperature detected by the return temperature sensor 24 approaches the set temperature, the outlet side of the heat exchanger is throttled to maintain the set temperature. Thus, hot water at the set temperature is supplied whenever the user opens the hot water tap.
【００３９】図７は図６の実施形態の混合弁のかわりに
循環保温用の熱交換器２２の出側に絞り弁３８持つもの
である。絞り弁開度を変えることで、熱交換器出側の高
温の湯とバイパス側の湯の混合比率を任意に変えること
ができるため、図６の構成と同様の作用効果を持つ。FIG. 7 has a throttle valve 38 at the outlet side of the heat exchanger 22 for circulating heat retention instead of the mixing valve of the embodiment of FIG. By changing the opening degree of the throttle valve, the mixing ratio between the hot water on the heat exchanger outlet side and the hot water on the bypass side can be arbitrarily changed, so that the same operation and effect as the configuration of FIG. 6 can be obtained.
【図１】本発明の一実施形態に係る循環保温式給湯装置
のブロック図。FIG. 1 is a block diagram of a circulation warming type hot water supply apparatus according to one embodiment of the present invention.
【図２】本発明の一実施形態が係る熱交換器のフィン断
面を示す図（給湯栓使用時）。FIG. 2 is a view showing a fin cross section of the heat exchanger according to one embodiment of the present invention (when a hot water tap is used).
【図３】本発明の一実施形態が係る熱交換器のフィン断
面を示す図（循環保温運転時）。FIG. 3 is a view showing a cross section of a fin of the heat exchanger according to one embodiment of the present invention (during a circulation warming operation).
【図４】本発明の一実施形態に係る膨張水処理装置の構
成図。FIG. 4 is a configuration diagram of an expansion water treatment apparatus according to an embodiment of the present invention.
【図５】本発明の一実施形態に係る循環保温式給湯装置
のブロック図。FIG. 5 is a block diagram of a circulation warming type hot water supply apparatus according to one embodiment of the present invention.
【図６】本発明の一実施形態に係る循環保温式給湯装置
のブロック図。FIG. 6 is a block diagram of a circulation warming type hot water supply apparatus according to one embodiment of the present invention.
【図７】本発明の一実施形態に係る循環保温式給湯装置
のブロック図。FIG. 7 is a block diagram of a circulation warming type hot water supply apparatus according to one embodiment of the present invention.
１…給湯器本体 ２…給水管路 ４…給湯用の熱交換器 ６…給湯管路 ７…給湯栓 ８…バイパス管 ９…混合弁 ２２…循環保温用の熱交換器 DESCRIPTION OF SYMBOLS 1 ... Water heater main body 2 ... Water supply line 4 ... Heat exchanger for hot water supply 6 ... Hot water supply line 7 ... Hot water tap 8 ... Bypass pipe 9 ... Mixing valve 22 ... Heat exchanger for circulating heat retention
───────────────────────────────────────────────────── フロントページの続き (72)発明者 川村 昌之 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 三浦 信二 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 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masayuki Kawamura 431-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo Prefecture Within Nihon Yupro Corporation (72) Inventor Shinji Miura 43-1 Uozakihama-cho, Higashinada-ku, Kobe-shi, Hyogo No. Japan Yupro Co., Ltd.
Claims (5)
とを混合弁で混合する給湯装置に接続された給湯管路を
再度、前記給湯装置に接続することで循環路を形成し、
この循環路内に循環ポンプを介設した循環保温式給湯装
置において、給湯用の熱交換器と、循環保温用の熱交換
器とを別々に設けたことを特徴とする循環保温式給湯装
置。1. A circulation path is formed by connecting a hot water supply line connected to a hot water supply device for mixing hot water heated by a heat exchanger and water in a water supply line with a mixing valve to the hot water supply device again. And
A circulating hot water heater in which a heat pump for hot water supply and a heat exchanger for circulating heat are separately provided in a circulating heat retaining hot water supply device having a circulation pump interposed in the circulation path.
換器とを共通の加熱部で加熱することを特徴とする請求
項１記載の循環保温式給湯装置。2. The circulating heat retaining hot water supply apparatus according to claim 1, wherein the heat exchanger for hot water supply and the heat exchanger for circulating heat retention are heated by a common heating unit.
水を処理するための膨張水処理装置を給湯装置内に設け
たことを特徴とする請求項１記載の循環保温式給湯装
置。3. The circulating heat retaining type hot water supply device according to claim 1, wherein an expansion water treatment device for treating expansion water generated in the circulation path due to thermal expansion is provided in the hot water supply device.
熱交換器をバイパスする管路を設けたことを特徴とする
請求項２記載の循環保温式給湯装置。4. The circulating heat retaining hot water supply apparatus according to claim 2, wherein the circulating heat retaining circulation pipe is provided with a conduit that bypasses the circulating heat retaining heat exchanger.
通る水量とバイパスする管路を通る水量の比を可変とす
ることを特徴とする請求項４記載の循環保温式給湯装
置。5. The circulation warming hot water supply apparatus according to claim 4, wherein the ratio of the amount of water passing through the heat exchanger for circulating warming and the amount of water passing through the bypass line is variable during the circulating warming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8463699A JPH11337103A (en) | 1998-03-26 | 1999-03-26 | Circulating and heat retaining type hot-water supplier |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10-100235 | 1998-03-26 | ||
| JP10023598 | 1998-03-26 | ||
| JP8463699A JPH11337103A (en) | 1998-03-26 | 1999-03-26 | Circulating and heat retaining type hot-water supplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11337103A true JPH11337103A (en) | 1999-12-10 |
Family
ID=26425634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8463699A Pending JPH11337103A (en) | 1998-03-26 | 1999-03-26 | Circulating and heat retaining type hot-water supplier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11337103A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014035158A (en) * | 2012-08-09 | 2014-02-24 | Corona Corp | Hot water supply device |
-
1999
- 1999-03-26 JP JP8463699A patent/JPH11337103A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014035158A (en) * | 2012-08-09 | 2014-02-24 | Corona Corp | Hot water supply device |
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