JPH05149567A - Tap-controlled hot water supplying apparatus - Google Patents
Tap-controlled hot water supplying apparatusInfo
- Publication number
- JPH05149567A JPH05149567A JP33935491A JP33935491A JPH05149567A JP H05149567 A JPH05149567 A JP H05149567A JP 33935491 A JP33935491 A JP 33935491A JP 33935491 A JP33935491 A JP 33935491A JP H05149567 A JPH05149567 A JP H05149567A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- circulating
- circulation
- water
- warm
- 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
Landscapes
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、循環ポンプを備えた配
管保温用循環回路を有し、配管内に温湯を循環させるこ
とにより、常時給湯栓を開くと同時に出湯することので
きる即出湯給湯器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a circulation circuit for heat insulation of a pipe provided with a circulation pump, and by circulating hot water in the pipe, it is possible to immediately open hot water taps and immediately discharge hot water. Regarding vessels.
【０００２】[0002]
【従来の技術】従来、循環ポンプを備えた配管保温用循
環回路を有し、配管内に温湯を循環させることにより、
常時給湯栓を開くと同時に出湯することのできる即出湯
給湯器が知られており、例えば実開平２− 61461号公報
に、熱交換器の両端にそれぞれ接続された出湯路と入水
路とを、出湯路に接続された給湯管路と、一端が給湯管
路に接続され、他端が戻り管路に接続されて適当数の給
湯栓を備えた給湯部と、循環ポンプを備え、入水路に接
続された戻り管路とにより連通させて循環回路を構成
し、循環ポンプの下流側に給水管路を接続し、給水管路
接続部と循環ポンプとの間の戻り管路、及び給水管路に
それぞれ逆止弁を設けた即出湯給湯器が記載されてい
る。2. Description of the Related Art Conventionally, by having a circulation circuit for heat insulation of a pipe equipped with a circulation pump, and circulating hot water in the pipe,
Immediate hot water heaters that can constantly discharge hot water at the same time when the hot water tap is opened are known. For example, Japanese Utility Model Publication No. 2-61461 discloses a hot water outlet and a water inlet connected to both ends of a heat exchanger. A hot water supply pipe connected to the hot water supply pipe, a hot water supply unit having one end connected to the hot water supply pipe and the other end connected to the return pipe and having an appropriate number of hot water taps, a circulation pump, and a water supply pipe. A circulation circuit is formed by communicating with the connected return pipeline, the water supply pipeline is connected to the downstream side of the circulation pump, and the return pipeline between the water supply pipeline connection part and the circulation pump and the water supply pipeline. Describes an immediate hot water heater provided with a check valve.
【０００３】上記即出湯給湯器においては、燃焼器によ
る加熱を行いつつ、即出湯運転スイッチを手動でオンす
ると、給湯栓が開かれると、循環回路内の循環水量と熱
交換器への入水量との差により、給湯栓開を検出して循
環ポンプの運転を停止し、熱交換器への入水温度、入水
量及び出湯温度に基づいてガス圧を制御する通常の給湯
器の出湯温度制御を行い、給湯栓を閉じると、給湯栓閉
を検出して循環ポンプを駆動させることにより、熱交換
器から送出された温湯が出湯路、給湯管路、給湯部、戻
り管路及び入水路を経て熱交換器に還流するものであ
り、給湯部には常時温湯が流通しているから、常に給湯
栓を開くと即時に温湯が得られると同時に給水管路から
戻り管路に冷水が供給される。In the instant hot water supply water heater, when the hot water discharge operation switch is manually turned on while heating by the combustor, when the hot water tap is opened, the amount of circulating water in the circulation circuit and the amount of water entering the heat exchanger. , The circulation pump operation is stopped by detecting the opening of the hot water supply tap, and the hot water outlet temperature control of the normal hot water heater that controls the gas pressure based on the water input temperature to the heat exchanger, the water input amount, and the hot water output temperature. When the hot water tap is closed, the hot water discharged from the heat exchanger is passed through the hot water outlet, hot water supply pipe, hot water supply section, return pipe, and water intake passage by detecting the closing of the hot water tap and driving the circulation pump. It is returned to the heat exchanger, and hot water is always flowing through the hot water supply part, so when the hot water tap is always opened, hot water is immediately obtained and at the same time cold water is supplied from the water supply line to the return line. ..
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記従
来の即出湯給湯器においては、即出湯運転スイッチを手
動でオン・オフすることにより循環ポンプの駆動停止を
行うものであるから、即出湯を行いたい場合には、即出
湯運転スイッチをオンさせたままに保持しなくてはなら
ないものであり、給湯使用頻度、即ち給湯栓を開閉する
頻度が低い場合には大きなエネルギーロスを生じるとい
う問題があった。However, in the above-mentioned conventional quick hot water heater, the circulation pump is stopped by manually turning on / off the quick hot water operation switch. If you want to, you have to keep the immediate hot water operation switch on, and there is a problem that a large energy loss occurs when the hot water usage frequency, that is, the frequency of opening and closing the hot water tap is low. It was
【０００５】本発明の目的は、給湯使用頻度の低い場合
には、自動的に設定温度を低下させるとともに、循環ポ
ンプをオン・オフさせることにより、エネルギーロスを
低減させることのできる即出湯給湯器を提供することで
ある。An object of the present invention is to provide an immediate hot water heater capable of reducing energy loss by automatically lowering the set temperature and turning the circulation pump on and off when the hot water supply frequency is low. Is to provide.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明の即出湯給湯器は、燃焼器等により加熱される
熱交換器に接続された入水路及び出湯路に、所定数の給
湯栓を有する循環路の両端を接続し、循環路に循環ポン
プを設置するとともに、循環ポンプの下流側に給水路を
接続して成り、燃焼運転中に給湯栓を閉じた給湯停止状
態になると循環ポンプを運転して所定の保温設定温度に
保った高温湯を循環路内に循環させる循環保温運転を行
う即出湯給湯器において、給湯停止状態が所定時間経過
すると、保温設定温度を所定値だけ低下させて循環させ
るセーブ運転を少なくとも１回行い、所定回数のセーブ
運転が完了する時点まて給湯栓が閉止された給湯停止状
態が継続している時に、長時間給湯栓が開かれないと判
定して循環保温運転を停止するものであり、給湯の使用
頻度の大小に応じた循環保温運転を行うことができ、給
湯使用頻度が大きい場合には保温設定温度を高くした循
環保温運転を行って高温湯を即出湯させることを可能に
し、給湯使用頻度が小さい場合には、循環保温運転にお
ける保温設定温度を下げることで不必要な燃焼を抑制し
てエネルギーロスを低減させることができる。In order to achieve the above object, an instant hot water supply water heater according to the present invention is provided with a predetermined number of hot water supply water in a water inlet passage and a hot water outlet passage connected to a heat exchanger heated by a combustor or the like. It connects the both ends of the circulation path with a stopper, installs a circulation pump in the circulation path, and connects a water supply channel to the downstream side of the circulation pump, and circulates when the hot water supply is stopped with the hot water supply plug closed during combustion operation. Immediate hot water heaters that perform circulating heat retention operation by circulating high temperature hot water that has been maintained at a predetermined heat retention temperature in the circulation path when the hot water supply is stopped for a predetermined time and the heat retention temperature is decreased by a predetermined value. It is determined that the hot-water tap will not be opened for a long time when the hot-water tap is closed and the hot-water tap is closed until the predetermined number of save-operations are completed. Circulation heat insulation The circulation warming operation can be performed according to the frequency of hot water use.If the hot water usage frequency is high, the circulation warming operation with a higher warming set temperature is performed to immediately release hot water. When the frequency of hot water supply is low, it is possible to suppress unnecessary combustion and reduce energy loss by lowering the heat retention set temperature in the circulation heat retention operation.
【０００７】[0007]
【実施例】本発明の実施例を図に基づいて説明する。図
１において、即出湯給湯器として給湯器を例に挙げて説
明すると、給湯器１は、上方に配設された熱交換器２
と、その下方に配置された燃焼器３と、燃焼器３の下方
の吸気路に配置された燃焼用ファン４とが、上部に排気
口51を有するケーシング５内に設けられており、燃焼器
３の近傍に点火プラグ６及び着火を検出するフレームロ
ッド７が配設されている。Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, the hot water supply device will be described as an example of the immediate hot water supply device. The hot water supply device 1 includes a heat exchanger 2 arranged above.
The combustor 3 arranged below the combustor 3 and the combustion fan 4 arranged in the intake passage below the combustor 3 are provided in a casing 5 having an exhaust port 51 in the upper part. A spark plug 6 and a flame rod 7 for detecting ignition are arranged in the vicinity of 3.
【０００８】熱交換器２には入水路21と出湯路22とが接
続され、入水路21には、熱交換器２への入水温度Ｔ1 を
検出する入水温度センサ８と、熱交換器２への入水量Ｑ
1 を検出する水量センサ９が設けられ、出湯路22には熱
交換器２からの出湯温度Ｔ2 を検出する出湯温度センサ
10が設けられており、出湯路22に循環ポンプ11を備えた
循環路23の一端が接続され、循環路23の他端は、入水温
度センサ８及び水量センサ９より上流位置において入水
路21に給水路25とともに合流接続され、循環路23に循環
路23内の通水量、即ち循環水量Ｑ2 を検出する循環水量
センサ12、及び適当数の給湯栓24が設置されている。A water inlet 21 and a hot water outlet 22 are connected to the heat exchanger 2, and the water inlet 21 has a water inlet temperature sensor 8 for detecting a water inlet temperature T 1 into the heat exchanger 2, and the heat exchanger 2 Amount of water entering Q
A water quantity sensor 9 for detecting 1 is provided, and a hot water temperature sensor for detecting a hot water temperature T 2 from the heat exchanger 2 is provided in the hot water passage 22.
10 is provided, one end of a circulation path 23 provided with a circulation pump 11 is connected to the hot water outlet path 22, and the other end of the circulation path 23 is connected to the water inlet path 21 at a position upstream of the water temperature sensor 8 and the water amount sensor 9. The water supply passage 25 is joined together, and the circulation passage 23 is provided with a circulation water amount sensor 12 for detecting the amount of water passing through the circulation passage 23, that is, a circulation water amount Q 2 , and an appropriate number of hot water taps 24.
【０００９】入水温度センサ８、入水量センサ９、出湯
温度センサ10及び循環水量センサ12からの検出信号がマ
イクロコンピュータ等から成り、タイマ部16、設定温度
調整部17及び制御部18から成るコントローラ13の制御部
18に入力され、これらの検出信号に基づいて制御部18
が、燃焼器３に接続されたガス供給路30に設けられた比
例制御弁（図示せず）及び能力切替弁31に燃焼量を調節
するための制御信号を出力する。また、燃焼用ファン４
には回転数検出センサ41が設けられており、該回転数検
出センサ41からの検出回転数はコントローラ13の制御部
18に入力され、燃焼器３の燃焼に要求される送風量に対
応した目標回転数に基づいて制御電圧を燃焼用ファン４
に出力し、燃焼用ファン４の回転数を制御する。The detection signals from the incoming water temperature sensor 8, the incoming water amount sensor 9, the hot water temperature sensor 10 and the circulating water amount sensor 12 are composed of a microcomputer and the like, and the controller 13 is composed of a timer section 16, a set temperature adjusting section 17 and a control section 18. Control unit
18 is input to the control unit 18 based on these detection signals.
Outputs a control signal for adjusting the combustion amount to a proportional control valve (not shown) provided in the gas supply passage 30 connected to the combustor 3 and the capacity switching valve 31. Also, the combustion fan 4
Is provided with a rotation speed detection sensor 41, and the rotation speed detected by the rotation speed detection sensor 41 is controlled by the control unit of the controller 13.
The control voltage is input to 18 and the control voltage is set based on the target rotation speed corresponding to the air flow rate required for the combustion of the combustor 3.
To control the rotation speed of the combustion fan 4.
【００１０】次に、図２に示すフローチャートを参照し
て動作について説明する。即出湯運転スイッチ14をオ
ン、セーブ運転スイッチ15をオンさせると、コントロー
ラ13が即出湯運転制御に移行し、給湯栓24が開かれてい
る場合は、循環路23から入水路21に流入する循環水量が
減少するから、コントローラ13において、入水量センサ
で検出した入水路21から熱交換器２に流入する入水量Ｑ
1 と、循環水量センサ12で検出した循環水量Ｑ2 との差
が所定値よりも大きくなったとき、例えば最小運転通水
量MOQ よりも大きく（Ｑ1 −Ｑ2 ≧MOQ ）なったときに
給湯栓24が開かれているものと判定し、循環ポンプ11を
停止して出湯運転を行い、入水温度センサ８、入水量セ
ンサ９、出湯温度センサ10からの出力及び設定温度Ｔs
に基づいて燃焼器３のガス圧制御を行う。Next, the operation will be described with reference to the flow chart shown in FIG. When the immediate hot water operation switch 14 is turned on and the save operation switch 15 is turned on, the controller 13 shifts to the immediate hot water operation control, and when the hot water tap 24 is opened, the circulation that flows from the circulation path 23 into the water inflow path 21. Since the amount of water decreases, the amount of water Q flowing into the heat exchanger 2 from the water inlet 21 detected by the water amount sensor in the controller 13
Hot water supply when the difference between 1 and the circulating water amount Q 2 detected by the circulating water amount sensor 12 becomes larger than a predetermined value, for example, larger than the minimum operating water flow amount MOQ (Q 1 −Q 2 ≧ MOQ). It is determined that the plug 24 is opened, the circulation pump 11 is stopped, and hot water discharge operation is performed. Output from the incoming water temperature sensor 8, the incoming water amount sensor 9, the outgoing hot water temperature sensor 10 and the set temperature Ts.
The gas pressure of the combustor 3 is controlled based on the above.
【００１１】給湯栓24が閉じられると、入水量Ｑ1 と循
環水量Ｑ2 との差が小さくなり、所定値未満、例えば最
小運転通水量MOQ 未満（Ｑ1 −Ｑ2 ＜MOQ ）となると給
湯栓24が閉止されたものと判定して第１次循環保温運転
に移行する。When the hot-water tap 24 is closed, the difference between the amount of water input Q 1 and the amount of circulating water Q 2 becomes small, and when the amount is less than a predetermined value, for example, less than the minimum operating water flow amount MOQ (Q 1 -Q 2 <MOQ), hot water is supplied. It is determined that the plug 24 is closed, and the first circulation heat retention operation is started.
【００１２】第１次循環保温運転に移行すると、循環ポ
ンプ11の運転が開始され、入水温度Ｔ1 が低下して予め
定められた保温設定温度Ｔsと入水温度Ｔ1 との差が第
１所定値α以上（Ｔs −Ｔ1≧α）になると、燃焼器３
の燃焼が開始される。燃焼器３の燃焼により循環水温度
が上昇し、保温設定温度Ｔs と入水温度Ｔ1 との差の絶
対値が第２所定値β以下（｜Ｔs −Ｔ1 ｜≦β）になる
と燃焼器３が消火され、この保温運転をコントローラ13
内のタイマ部16により設定された一定時間継続する。When the operation shifts to the primary circulation heat retention operation, the operation of the circulation pump 11 is started, the water inlet temperature T 1 is lowered, and the difference between the predetermined heat retention set temperature Ts and the water inlet temperature T 1 is the first predetermined value. When the value exceeds α (Ts-T 1 ≧ α), the combustor 3
Combustion is started. When the circulating water temperature rises due to the combustion of the combustor 3 and the absolute value of the difference between the heat retention set temperature Ts and the incoming water temperature T 1 becomes the second predetermined value β or less (| Ts-T 1 | ≦ β), the combustor 3 The fire is extinguished, and the controller 13
It continues for a fixed period of time set by the timer unit 16 therein.
【００１３】一定時間内に給湯栓24が開かれて出湯が行
われる場合は、入水量Ｑ1 と循環水量Ｑ2 との差が所定
値、例えば最小運転通水量MOQ 以上（Ｑ1 −Ｑ2 ≧MOQ
）になると、循環ポンプ11を停止して出湯運転を行
い、入水温度センサ８、入水量センサ９、出湯温度セン
サ10からの出力及び設定温度Ｔs に基づいて燃焼器３の
ガス圧制御を行って通常の出湯運転制御を行うととも
に、タイマ部16をリセットする。When the hot water tap 24 is opened and the hot water is discharged within a certain time, the difference between the water input Q 1 and the circulating water Q 2 is a predetermined value, for example, the minimum operating water flow MOQ (Q 1 -Q 2 ≧ MOQ
), The circulation pump 11 is stopped and hot water discharge operation is performed, and the gas pressure control of the combustor 3 is performed based on the output from the incoming water temperature sensor 8, the incoming water amount sensor 9, the outgoing hot water temperature sensor 10 and the set temperature Ts. The normal hot water discharge operation control is performed, and the timer unit 16 is reset.
【００１４】給湯栓24が閉止された循環保温運転状態で
一定時間が経過すると、タイマ部16からの出力により、
設定温度調整部17が保温設定温度Ｔs を予め定めた所定
値ａだけ低下させ、新しい保温設定温度（Ｔs −ａ）に
基づいて第２次循環保温運転を行う（セーブ運転）もの
であり、保温設定温度（Ｔs −ａ）と入水温度Ｔ1 との
差が第１所定値α以上｛（Ｔs −ａ）−Ｔ1 ≧α｝にな
ると、燃焼器３の燃焼が開始され、循環水温度が上昇
し、保温設定温度Ｔs と入水温度Ｔ1との差の絶対値が
第２所定値β以下｛｜（Ｔs −ａ）−Ｔ1 ｜≦β｝にな
ると燃焼器３が消火され、この保温運転をコントローラ
13内のタイマ部16により設定された一定時間継続する。When a certain period of time elapses in the circulation heat retention operation state in which the hot water tap 24 is closed, the output from the timer section 16 causes
The preset temperature adjusting unit 17 lowers the preset heat retention temperature Ts by a predetermined value a and performs the secondary circulation warming operation based on the new preset heat retention temperature (Ts-a) (save operation). If the difference between the set temperature and (Ts -a) and the incoming water temperature T 1 is made to a first predetermined value or more α {(Ts -a) -T 1 ≧ α}, the combustion of the combustor 3 is started, the circulating water temperature The combustor 3 is extinguished when the absolute value of the difference between the heat retention set temperature Ts and the incoming water temperature T 1 becomes the second predetermined value β or less {| (Ts-a) -T 1 | ≦ β}, and the heat retention is maintained. Driving the controller
It continues for a certain period of time set by the timer unit 16 in 13.
【００１５】前回の第１次循環保温運転時と同様に、第
２次循環保温運転時に、タイマ部16で設定された一定時
間内に給湯栓24が開かれて入水量Ｑ1 と循環水量Ｑ2 と
の差が所定値例えば最小運転通水量MOQ 以上（Ｑ1 −Ｑ
2 ≧MOQ ）になると、循環ポンプ11を停止して通常の出
湯運転制御を行うとともに、タイマ部16をリセットす
る。Similar to the previous first circulation heat retention operation, during the second circulation heat retention operation, the hot water tap 24 is opened within a fixed time set by the timer unit 16 and the amount of incoming water Q 1 and the amount of circulating water Q The difference from 2 is a specified value, for example, the minimum operating water flow MOQ or more (Q 1 -Q
When 2 ≧ MOQ), the circulation pump 11 is stopped, the normal hot water discharge operation control is performed, and the timer unit 16 is reset.
【００１６】給湯栓24が開かれることなくタイマ部16で
設定された一定時間内が経過した場合には、給湯栓24が
長時間使用されないものと判定し、循環ポンプを停止さ
せ、循環保温運転を停止する。If the hot water tap 24 has not been opened and the fixed time set by the timer 16 has elapsed, it is determined that the hot water tap 24 will not be used for a long time, the circulation pump is stopped, and the circulation warming operation is performed. To stop.
【００１７】上記実施例においては、セーブ運転、即ち
所定時間内に給湯使用が無い時に保温設定温度を所定値
ａだけ低下させて行う循環保温運転を１回行い（第２次
循環保温運転）、所定時間経過後に循環保温運転を停止
しているが、循環保温運転を停止するまでのセーブ運転
の回数は適宜設定することができるものであり、保温設
定温度を低下させる値ａもセーブ運転の回数に応じて設
定することができる。また、セーブ運転スイッチ15をコ
ントローラ13内に機能として組み込んでおくことによ
り、自動的にセーブ運転を選択することができる。In the above-described embodiment, the save operation, that is, the circulation heat retention operation in which the heat retention set temperature is decreased by the predetermined value a when the hot water is not used within the predetermined time is performed once (second circulation heat retention operation), Although the circulation warming operation is stopped after the lapse of a predetermined time, the number of save operations until the circulation warming operation is stopped can be set as appropriate, and the value a for lowering the heat setting temperature is also the number of save operations. It can be set according to. In addition, the save operation can be automatically selected by incorporating the save operation switch 15 in the controller 13 as a function.
【００１８】上述の構成により、給湯使用頻度が大きい
場合には保温設定温度を高くした循環保温運転を行い、
随時高温湯を即出湯させることを可能にし、給湯使用頻
度が小さい場合には、循環保温運転における保温設定温
度を下げることで不必要な燃焼を抑制してエネルギーロ
スの低減を図ることができる。With the above configuration, when the hot water supply frequency is high, the circulation heat retention operation is performed with the heat retention set temperature increased,
It is possible to quickly discharge hot water from time to time, and when the hot water supply frequency is low, it is possible to suppress unnecessary combustion and reduce energy loss by lowering the heat retention set temperature in the circulation heat retention operation.
【００１９】[0019]
【発明の効果】本発明は、上述のとおり構成されている
から、給湯の使用頻度の大小に応じた循環保温運転を行
うことができ、給湯使用頻度が大きい場合には保温設定
温度を高くした循環保温運転を行って高温湯を即出湯さ
せることを可能にし、給湯使用頻度が小さい場合には、
循環保温運転における保温設定温度を下げることで不必
要な燃焼を抑制してエネルギーロスを低減させることが
できる。EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is possible to carry out the circulation heat retention operation according to the frequency of hot water use, and when the frequency of hot water use is high, the preset temperature is increased. Circulating heat retention operation enables high temperature hot water to be discharged immediately, and when the hot water supply frequency is low,
By lowering the heat retention set temperature in the circulation heat retention operation, unnecessary combustion can be suppressed and energy loss can be reduced.
【図１】本発明に係る即出湯給湯器の概略構成図であ
る。FIG. 1 is a schematic configuration diagram of an immediate hot water heater according to the present invention.
【図２】本発明に係る制御動作のフローチャートであ
る。FIG. 2 is a flowchart of a control operation according to the present invention.
１ 給湯器 ２ 熱交換器 ３ 燃焼器 ４ 燃焼用ファン ５ ケーシング ８ 入水温度センサ ９ 入水量センサ 10 出湯温度センサ10 11 循環ポンプ 12 循環水量センサ 13 コントローラ 14 即出湯運転スイッチ 15 セーブ運転スイッチ 21 入水路 22 出湯路 23 循環路 24 給湯栓 25 給水路 1 Hot Water Heater 2 Heat Exchanger 3 Combustor 4 Combustion Fan 5 Casing 8 Inlet Water Temperature Sensor 9 Inlet Water Volume Sensor 10 Outlet Water Temperature Sensor 10 11 Circulation Pump 12 Circulating Water Volume Sensor 13 Controller 14 Immediate Hot Water Operation Switch 15 Save Operation Switch 21 Inlet Channel 22 Hot water outlet 23 Circulation passage 24 Hot water tap 25 Water inlet
Claims (1)
に、所定数の給湯栓を有する循環路の両端を接続し、循
環路に循環ポンプを設けるとともに、循環ポンプの下流
側に給水路を接続して成り、給湯停止状態になると循環
ポンプを運転して所定の保温設定温度に保った高温湯を
循環路内に循環させる循環保温運転を行う即出湯給湯器
において、給湯停止状態が所定時間経過すると、保温設
定温度を所定値だけ低下させて循環させるセーブ運転を
少なくとも１回行い、所定回数のセーブ運転が完了する
時点まて給湯栓が閉止された給湯停止状態が継続してい
る時に長時間給湯栓が開かれないと判定し、循環保温運
転を停止させることを特徴とする即出湯給湯器。1. A water inlet and a water outlet connected to a heat exchanger are connected to both ends of a circulation passage having a predetermined number of hot water taps, a circulation pump is provided in the circulation passage, and water is supplied downstream of the circulation pump. When the hot water supply is stopped when the hot water supply is stopped, the circulation pump is operated when the hot water supply is stopped and the circulating hot water is circulated in the circulation path to circulate the high temperature hot water kept at the preset temperature. After a lapse of a predetermined time, a save operation in which the preset temperature is decreased by a predetermined value and circulated is performed at least once, and the hot water supply stop state in which the hot water tap is closed continues until the save operation of the predetermined number of times is completed. An immediate hot water heater, which sometimes determines that the hot water tap will not be opened for a long time and stops the circulating heat retention operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33935491A JP2689797B2 (en) | 1991-11-29 | 1991-11-29 | Instant hot water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33935491A JP2689797B2 (en) | 1991-11-29 | 1991-11-29 | Instant hot water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05149567A true JPH05149567A (en) | 1993-06-15 |
| JP2689797B2 JP2689797B2 (en) | 1997-12-10 |
Family
ID=18326670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33935491A Expired - Fee Related JP2689797B2 (en) | 1991-11-29 | 1991-11-29 | Instant hot water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2689797B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121799A (en) * | 1994-10-24 | 1996-05-17 | Toto Ltd | Water heater with instantaneous heating function |
| JPH08159501A (en) * | 1994-12-05 | 1996-06-21 | Toto Ltd | Hot-water supply device |
| JPH10300191A (en) * | 1997-04-21 | 1998-11-13 | Noritz Corp | Hot-water supplier provided with sterilizing function |
| JPH11325594A (en) * | 1998-05-18 | 1999-11-26 | Shigeru Chiba | Water heater |
| JP2001124357A (en) * | 1999-10-28 | 2001-05-11 | Noritz Corp | Water heater with instantaneous hot water supplying function and method for detecting fault of water heater with instantaneous hot water supplying function |
| JP2004286397A (en) * | 2003-03-25 | 2004-10-14 | Rinnai Corp | Hot-water supply device with instantaneous hot-water supply function |
| JP2015025602A (en) * | 2013-07-25 | 2015-02-05 | 東京瓦斯株式会社 | Water and hot water supply system |
| CN104359148A (en) * | 2014-10-31 | 2015-02-18 | 北京中建建筑科学研究院有限公司 | Heat supply pipe network transmission and distribution energy consumption controller |
| JP2018071822A (en) * | 2016-10-25 | 2018-05-10 | 株式会社ノーリツ | Water heater |
| JP2021050859A (en) * | 2019-09-25 | 2021-04-01 | 株式会社コロナ | Hot-water immediately supply apparatus |
-
1991
- 1991-11-29 JP JP33935491A patent/JP2689797B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08121799A (en) * | 1994-10-24 | 1996-05-17 | Toto Ltd | Water heater with instantaneous heating function |
| JPH08159501A (en) * | 1994-12-05 | 1996-06-21 | Toto Ltd | Hot-water supply device |
| JPH10300191A (en) * | 1997-04-21 | 1998-11-13 | Noritz Corp | Hot-water supplier provided with sterilizing function |
| JPH11325594A (en) * | 1998-05-18 | 1999-11-26 | Shigeru Chiba | Water heater |
| JP2001124357A (en) * | 1999-10-28 | 2001-05-11 | Noritz Corp | Water heater with instantaneous hot water supplying function and method for detecting fault of water heater with instantaneous hot water supplying function |
| JP2004286397A (en) * | 2003-03-25 | 2004-10-14 | Rinnai Corp | Hot-water supply device with instantaneous hot-water supply function |
| JP2015025602A (en) * | 2013-07-25 | 2015-02-05 | 東京瓦斯株式会社 | Water and hot water supply system |
| CN104359148A (en) * | 2014-10-31 | 2015-02-18 | 北京中建建筑科学研究院有限公司 | Heat supply pipe network transmission and distribution energy consumption controller |
| JP2018071822A (en) * | 2016-10-25 | 2018-05-10 | 株式会社ノーリツ | Water heater |
| JP2021050859A (en) * | 2019-09-25 | 2021-04-01 | 株式会社コロナ | Hot-water immediately supply apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2689797B2 (en) | 1997-12-10 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |