JPH11182931A - Hot-water supplier with heat preservation function - Google Patents
Hot-water supplier with heat preservation functionInfo
- Publication number
- JPH11182931A JPH11182931A JP9367329A JP36732997A JPH11182931A JP H11182931 A JPH11182931 A JP H11182931A JP 9367329 A JP9367329 A JP 9367329A JP 36732997 A JP36732997 A JP 36732997A JP H11182931 A JPH11182931 A JP H11182931A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- combustion
- water
- heat
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 193
- 238000004321 preservation Methods 0.000 title abstract 8
- 238000002485 combustion reaction Methods 0.000 claims description 152
- 238000010792 warming Methods 0.000 claims description 59
- 238000009413 insulation Methods 0.000 claims description 12
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 230000036760 body temperature Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 241000238413 Octopus Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Control Of Combustion (AREA)
Abstract
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【発明の属する技術分野】本発明は、給湯待機中に保温
燃焼運転を行って熱交換器内やその周囲の水温を適当に
上げておき、給湯時にはその初期であっても冷水が流れ
出ないようにした保温機能付き給湯器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulated combustion operation during standby for hot water supply to appropriately raise the temperature of water in and around a heat exchanger so that cold water does not flow even at the beginning of hot water supply. The present invention relates to a water heater with a heat retaining function.
【０００２】[0002]
【従来の技術】従来より給湯待機中、即ち給湯していな
い場合であっても、バーナを燃焼させて給湯性能を向上
させる機能（以下、保温機能という）を備えた瞬間湯沸
器等の保温機能付き給湯器が提供されている。これは給
湯器の保温機能によってコールドスタート時及び再給湯
待機中に燃焼を行って熱交換器やその周囲の水温を適当
に上げておき、コールドスタートにおける給湯立ち上が
り時及び再給湯時に冷水が出るのを抑制すると共に、速
やかに設定温度が得られるようにするものである。2. Description of the Related Art Conventionally, a hot water heater or the like provided with a function of burning a burner to improve hot water supply performance (hereinafter referred to as a heat retaining function) even during hot water supply standby, that is, when hot water is not supplied. A water heater with function is provided. This is because the warming function of the water heater burns during cold start and waiting for re-hot water supply and raises the temperature of the heat exchanger and the surrounding water appropriately. , And the set temperature can be promptly obtained.
【０００３】図５は従来の保温機能付き給湯器の概略構
成図、図６は従来の保温機能付き給湯器における保温燃
焼とインターバル時間との関係を説明するためのグラ
フ、図７は従来の保温機能付き給湯器における保温運転
継続時間と保温燃焼回数との関係を説明するためのグラ
フである。FIG. 5 is a schematic configuration diagram of a conventional water heater with a heat retaining function, FIG. 6 is a graph for explaining the relationship between warm combustion and interval time in a conventional water heater with a heat retaining function, and FIG. It is a graph for demonstrating the relationship between the warming operation continuation time and the number of times of warming combustion in the water heater with function.
【０００４】以下、従来の保温機能付き給湯器の構成を
図５を参照しながら説明する。給湯器は少なくとも入水
管路２１と、出湯管路２２と、給湯管路２３と、熱交換
器２５とバーナ機構２６等からなる缶体２４と、入水管
路２１から缶体２４を経由することなくダイレクトに給
湯管路２３へ至るバイパス管路２７とを備えている。ま
た、入水管路２１には入水温度センサ２８及び水量セン
サ２９が、出湯管路２２には出湯温度センサ３０が、給
湯管路２３には給湯温度センサ３１がそれぞれ設けられ
ている。３２は上記給湯器の保温燃焼機能を動作させ、
その他、装置各部の動作を制御するための制御部であ
る。上記制御部３２に内蔵されている保温運転に関する
ソフトウエアは、上記出湯温度センサ３０で検出した管
路内の水温が保温燃焼開始温度ＴS を下回れば保温燃焼
を開始し、上記管路内の水温が保温燃焼停止温度ＴE を
上回れば保温燃焼を停止するように制御するものである
が、インターバル時間を１種類しか持っておらず、上記
インターバル時間も、どちらかと言うとコールドスター
トからの立ち上がりを基準として設定されたものであっ
た。Hereinafter, a configuration of a conventional water heater with a heat retaining function will be described with reference to FIG. The water heater passes through at least the water inlet pipe 21, the tap water pipe 22, the hot water pipe 23, the can body 24 including the heat exchanger 25 and the burner mechanism 26, and the water pipe 21 through the can body 24. And a bypass line 27 directly leading to the hot water supply line 23. Further, a water inlet temperature sensor 28 and a water amount sensor 29 are provided in the water inlet pipe 21, a hot water temperature sensor 30 is provided in the hot water pipe 22, and a hot water temperature sensor 31 is provided in the hot water pipe 23. 32 operates the warming combustion function of the water heater,
In addition, it is a control unit for controlling the operation of each unit of the device. The software related to the warming operation incorporated in the control unit 32 starts the warming combustion when the water temperature in the pipeline detected by the tapping temperature sensor 30 falls below the warming combustion start temperature T S. Although the water temperature is used to control so as to stop the warm combustion if exceeds the warm combustion stop temperature T E, 1 type the interval time only not have, rise from a cold start and also the interval time, rather Was set on the basis of.
【０００５】しかして、上記構成にかかる従来の給湯器
における保温運転は、制御部３２に内蔵されたソフトウ
エアの手順に従い、コールドスタート時及び給湯待機中
において、予め保温燃焼を行って熱交換器内の水温を上
げておき、給湯立ち上がり時及び再給湯時に冷水が出る
のを減らすと共に、速やかに設定温度になるように制御
されている。[0005] In the conventional water heater having the above-described configuration, the heat keeping operation is performed by performing heat keeping combustion in advance at the time of cold start and while waiting for hot water supply in accordance with the procedure of software built in the control unit 32. The temperature of the inside of the hot water is raised to reduce the flow of cold water at the time of hot water supply rising and re-hot water supply, and is controlled so as to quickly reach the set temperature.
【０００６】[0006]
【発明が解決しようとする課題】ところが、上記構成に
かかる従来の保温機能付き給湯器では、強制循環回路に
より構成される即湯機能とは異なり、瞬間的な保温燃焼
を何度も繰り返して熱交換器を加熱保温するため、耐久
性と安全性の点で問題がある。即ち、耐久性と安全性を
確保するために保温燃焼停止後のインターバル時間を長
く設定すると、保温性能（使い勝手）が悪くなる。従っ
て給湯器の保温機能を充分達成するためには、保温燃焼
停止後のインターバル時間を短く設定しなければならな
かった。即ち図６で示すように、保温燃焼動作時、例え
ば０．３秒間保温燃焼すると（ｇ）、１分間のインター
バル時間（Ｈ6 ）をおき、１分経過後、続いて０．３秒
間保温燃焼（ｈ）し、再び、１分間のインターバル時間
をおき（Ｈ7 ）、さらに０．３秒間保温燃焼する（ｉ）
ことで、管路内の水温は保温燃焼停止温度ＴE に達し、
保温燃焼が停止されるようになっており、管路内の水温
が低下して保温燃焼開始温度ＴS になると、上記手順の
保温燃焼とインターバル時間が繰り返される。従って、
短い時間の１スパン（Ｈ5 ）中に行われる保温燃焼の回
数が多くなり、保温性能は確保できるのものの、耐久性
（缶体寿命が短くなる）と安全性で不具合があった。こ
のように従来の保温機能付き給湯器では、インターバル
時間を長め又は短めかの何れか１種類しか設定されてい
なかったため、耐久性と安全性及び保温性能の点でバラ
ンスのとれたものが得られなかった。However, in the conventional hot water supply device having the heat retaining function according to the above configuration, unlike the instant hot water function constituted by the forced circulation circuit, the instantaneous heat retaining combustion is repeated many times to generate heat. There is a problem in durability and safety because the exchanger is heated and kept warm. That is, if the interval time after the stop of the heat retention combustion is set long to ensure durability and safety, the heat retention performance (usability) deteriorates. Therefore, in order to sufficiently achieve the heat retaining function of the water heater, the interval time after stopping the heat retaining combustion had to be set short. That is, as shown in FIG. 6, during the warm combustion operation, for example, when the warm combustion is performed for 0.3 second (g), an interval time (H 6 ) of 1 minute is set, and after the lapse of 1 minute, the warm combustion is continued for 0.3 second. (H) Then, an interval time of 1 minute is set again (H 7 ), and the mixture is further insulated for 0.3 second (i).
It is, water temperature in the conduit is reached insulation combustion stop temperature T E,
The warm combustion is stopped, and when the water temperature in the pipe decreases to reach the warm combustion start temperature T S , the warm combustion and the interval time of the above procedure are repeated. Therefore,
Short time of one span (H 5) the number of heat insulating combustion is increased to be performed during the heat insulating performance of anything to be secured, there is a problem in safety and durability (boiler body life is shortened). As described above, in the conventional water heater with the heat retaining function, only one of the longer and shorter interval times is set, so that a well-balanced one can be obtained in terms of durability, safety, and heat retaining performance. Did not.
【０００７】また従来の保温機能付き給湯器では、例え
ば図７で示すように、一定の保温運転継続時間（Ｈ8 ）
内での保温燃焼の回数が限定されておらず、管路内の水
温が保温燃焼開始ＴS 温度に達し、保温燃焼開始条件が
満たされると、仮に保温燃焼がｉ、ｋ及びｌと３回行わ
れていても４回目の保温燃焼ｍが行われる。従って、一
定の保温運転継続時間（Ｈ8 ）内で多数回の保温燃焼が
行われる可能性が高く、缶体の寿命に悪影響が多い。In a conventional water heater with a heat retaining function, for example, as shown in FIG. 7, a constant heat retaining operation continuation time (H 8 )
Not limited the number of insulation combustion on the inner, water temperature in the conduit reaches the insulation combustion start T S temperature, the heat insulating combustion start condition is satisfied, if kept burning i, k and l and 3 times Even if it is performed, the fourth warming combustion m is performed. Therefore, there is a high possibility that a large number of warming combustions will be performed within a constant warming operation continuation time (H 8 ), and the life of the can body will be adversely affected.
【０００８】さらに上記給湯器における通常の着火シー
ケンスでは、例えば初期に５秒間の着火動作１回と再着
火動作時に２秒間の着火動作を２回行うように設定され
ており、通常の給湯燃焼時は通水状態であるので上記着
火シーケンスで別段問題はないが、保温燃焼中に炎検知
器の故障や火移り不良（炎検知する燃焼管のみ点火しな
い場合）が発生した場合には、保温燃焼時は非通水状態
で着火させるため、着火動作に入る毎に熱交換器が部分
的等に加熱されるおそれがあり、又これによって熱交換
器内部の圧力上昇を招き、耐久性と安全性の点で問題が
あった。Further, in the normal ignition sequence in the water heater, for example, it is set so that the ignition operation is performed once for 5 seconds at the initial stage and the ignition operation for 2 seconds is performed twice at the time of the re-ignition operation. Since there is no problem in the above ignition sequence because of the water flow state, if the failure of the flame detector or the poor fire transfer (when only the combustion tube for flame detection does not ignite) occurs during the warm combustion, the warm combustion When ignited, the heat exchanger may be partially heated each time the ignition operation starts, and this may cause the pressure inside the heat exchanger to rise, resulting in durability and safety. There was a problem in the point.
【０００９】本発明は上記不具合に鑑みて発明されたも
のであって、保温性能の低下をきたすことなく、耐久性
及び安全性を確保することのできる保温機能付き給湯器
を提供することを課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a water heater with a heat retaining function capable of ensuring durability and safety without deteriorating the heat retaining performance. And
【００１０】[0010]
【課題を解決するための手段】上記課題を達成するた
め、本発明の保温機能付き給湯器は、入水管路と、出湯
管路と、熱交換器とバーナ機構とを含む缶体と、前記熱
交換器内の水温を検出するための温度センサとを少なく
とも備え、給湯を行っていない場合においても前記バー
ナ機構を燃焼させて保温運転を行うことができるように
した保温機能付き給湯器であって、保温運転中におい
て、上記温度センサで検出した熱交換器内の水温が保温
燃焼開始温度を下回ればサイクル燃焼による保温燃焼を
開始し、上記熱交換器内の水温が保温燃焼停止温度を上
回れば保温燃焼を停止するように制御するにあたり、上
記各サイクルの保温燃焼間のインターバル時間を少なく
とも長短２種類以上設定すると共にインターバル切替温
度を設定し、上記温度センサで検出した熱交換器内の水
温が該インターバル切替温度を超えている場合には長め
のインターバル時間に切替え、超えていない場合には短
めのインターバル時間に切替えるように制御する制御部
を設けたことを第１の特徴としている。また本発明の保
温機能付き給湯器は、入水管路と、出湯管路と、熱交換
器とバーナ機構とを含む缶体と、前記熱交換器内の水温
を検出するための温度センサとを少くとも備え、給湯を
行っていない場合においても前記バーナ機構を燃焼させ
て保温運転を行うことができるようにした保温機能付き
給湯器であって、保温運転中において、上記温度センサ
で検出した熱交換器内の水温が保温燃焼開始温度を下回
れば保温燃焼を開始し、上記熱交換器内の水温が保温燃
焼停止温度を上回れば保温燃焼を停止するように制御す
るにあたり、一定の保温運転継続時間を設定すると共に
該保温運転継続時間内に行われる保温燃焼に一定の回数
制限を設け、上記保温燃焼回数が制限回数を超えた場合
には保温燃焼を行わないように制御する制御部を設けた
ことを第２の特徴としている。さらに本発明の保温機能
付き給湯器は、入水管路と、出湯管路と、熱交換器とバ
ーナ機構とを含む缶体と、前記熱交換器内の水温を検出
するための温度センサとを少なくとも備え、給湯を行っ
ていない場合においても前記バーナ機構を燃焼させて保
温運転を行うことができるようにした保温機能付き給湯
器であって、保温運転中において、上記温度センサで検
出した熱交換器内の水温が保温燃焼開始温度を下回れば
保温燃焼を開始し、上記熱交換器内の水温が保温燃焼停
止温度を上回れば保温燃焼を停止するように制御するに
あたり、上記保温燃焼時のバーナの着火動作時間を給湯
燃焼時の着火動作時間よりも短く、且つ保温燃焼時のバ
ーナの再着火動作回数を給湯燃焼時の再着火動作回数よ
りも少なくなるように制御する制御部を設けたことを第
３の特徴としている。Means for Solving the Problems To achieve the above object, a water heater with a heat retaining function of the present invention comprises a can body including a water inlet pipe, a hot water pipe, a heat exchanger and a burner mechanism, A water heater having at least a temperature sensor for detecting a water temperature in the heat exchanger, wherein the water heater with a heat retaining function is capable of performing a heat retaining operation by burning the burner mechanism even when hot water is not supplied. During the warming operation, if the water temperature in the heat exchanger detected by the temperature sensor is lower than the warming start temperature, the warming combustion by the cycle combustion is started, and the water temperature in the heat exchanger exceeds the warming stop temperature. For example, in controlling to stop the warming combustion, at least two types of interval times between the warming combustions in each cycle are set, and at least two types of interval times are set, and the interval switching temperature is set. When the water temperature in the heat exchanger detected by the sensor exceeds the interval switching temperature, the control unit switches to a longer interval time, and if not, switches to a shorter interval time. This is the first feature. Further, the water heater with a heat retaining function of the present invention includes a water inlet pipe, a tap water pipe, a can body including a heat exchanger and a burner mechanism, and a temperature sensor for detecting a water temperature in the heat exchanger. A water heater with a heat retaining function that is capable of performing a heat retaining operation by burning the burner mechanism even when hot water is not supplied, wherein a heat detected by the temperature sensor during the heat retaining operation is provided. When the water temperature in the exchanger is lower than the insulated combustion start temperature, the insulated combustion is started.When the water temperature in the heat exchanger is higher than the insulated combustion stop temperature, the insulated combustion is stopped. A control unit is provided for setting a time and limiting the number of times of the warming combustion performed during the warming operation continuation time to a certain number of times, and controlling not to perform the warming combustion when the number of times of the warming combustion exceeds the limit number. Octopus The is a second feature. Further, the water heater with a heat retaining function of the present invention includes a water inlet pipe, a tap water pipe, a can body including a heat exchanger and a burner mechanism, and a temperature sensor for detecting a water temperature in the heat exchanger. A water heater with a heat retention function that is capable of performing a heat retention operation by burning the burner mechanism even when hot water is not supplied, wherein the heat exchange detected by the temperature sensor during the heat retention operation When controlling to start the warming combustion when the water temperature in the vessel falls below the warming combustion start temperature, and to stop the warming combustion when the water temperature in the heat exchanger exceeds the warming stop temperature, the burner during the warming combustion is controlled. A control unit that controls the ignition operation time of the burner to be shorter than the ignition operation time of the hot water supply combustion, and to reduce the number of re-ignition operations of the burner at the time of the warming combustion to be less than the number of re-ignition operations at the time of hot water combustion. The is a third feature.
【００１１】[0011]
【発明の実施の形態】以下、本発明の第１ないし第３の
実施の形態による保温機能付き給湯器について図面を参
照して説明する。図１は本発明の第１ないし第３の実施
の形態例に共通する保温機能付き給湯器の構成図、図２
は本発明の第１の実施の形態例による保温機能付き給湯
器における保温燃焼とインターバル時間との関係を説明
するためのグラフ、図３は本発明の第２の実施の形態例
による保温機能付き給湯器における保温運転継続時間と
保温燃焼回数との関係を説明するためのグラフ、図４は
本発明の第３の実施の形態例による保温機能付き給湯器
における着火動作及び再着火動作と着火動作時間の関係
を示すグラフであって、（Ａ）は同形態例による場合、
（Ｂ）は比較例である従来の場合を示している。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a water heater with a heat retaining function according to first to third embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a water heater with a heat retention function common to the first to third embodiments of the present invention.
FIG. 3 is a graph for explaining the relationship between the heat retention combustion and the interval time in the water heater with the heat retention function according to the first embodiment of the present invention, and FIG. 3 is a graph with the heat retention function according to the second embodiment of the present invention. FIG. 4 is a graph for explaining the relationship between the duration of the warming operation and the number of times of warming combustion in the water heater, and FIG. 4 shows an ignition operation, a reignition operation, and an ignition operation in the water heater with the warming function according to the third embodiment of the present invention. It is a graph which shows the relationship of time, (A) is the case of the same form example,
(B) shows a conventional case as a comparative example.
【００１２】まず、本発明の第１の実施の形態例にかか
る保温機能付き給湯器の構成を図１を参照しながら説明
する。この給湯器は少なくとも入水管路１と、出湯管路
２と、給湯管路３と、熱交換器５とバーナ機構６とファ
ン７等からなる缶体４と、入水管路１から缶体３を経由
することなくダイレクトに給湯管路３へ至るバイパス管
８及び該バイパス管８に配されたバイパス水量調整弁９
と、上記入水管路１に設けられた入水温度センサ１０及
び水量センサ１１と、上記出湯管路２に設けられた過流
出防止調整弁１２と、上記給湯管路３に設けられた給湯
温度センサ１３と、上記熱交換器５を構成する熱交換パ
イプの両側部のベンド部等、熱交換器５近傍に設けられ
て該熱交換器５内の水温（以下、缶体温度とする）を検
出するための温度センサ１４とから基本構成されてい
る。制御部１５は保温燃焼開始条件や保温燃焼停止後の
インターバル時間等の設定を自動的に行い、その他、装
置各部の制御を行うようになっている。なお、上記ベン
ド部とは缶体４内の熱交換器５の水管の屈曲部を意味
し、望ましくは缶体４の外側にある熱交換器５の水管の
屈曲部であって、燃焼炎が直接当たらない位置とする。First, the configuration of a water heater with a heat retaining function according to a first embodiment of the present invention will be described with reference to FIG. The water heater includes at least a water inlet line 1, a tap water line 2, a hot water line 3, a can body 4 including a heat exchanger 5, a burner mechanism 6, a fan 7, and the like. And a bypass water amount adjusting valve 9 arranged in the bypass pipe 8 directly to the hot water supply pipe 3 without passing through
A water inlet temperature sensor 10 and a water amount sensor 11 provided in the water inlet line 1, an overflow prevention adjusting valve 12 provided in the water outlet line 2, and a hot water supply temperature sensor provided in the hot water line 3 13 and a water temperature (hereinafter referred to as a can body temperature) in the heat exchanger 5 provided near the heat exchanger 5 such as bends on both sides of a heat exchange pipe constituting the heat exchanger 5. And a temperature sensor 14. The control section 15 automatically sets the conditions for keeping warm combustion and the interval time after stopping warm combustion, and controls other parts of the apparatus. In addition, the said bend part means the bent part of the water pipe of the heat exchanger 5 in the can body 4, Preferably it is the bent part of the water pipe of the heat exchanger 5 outside the can body 4, and the combustion flame A position that does not directly hit.
【００１３】そして、上記制御部１５には、上記温度セ
ンサ１４で検出した缶体温度が保温燃焼開始温度ＴS を
下回ればサイクル燃焼による保温燃焼を開始し、上記缶
体温度が保温燃焼停止温度ＴE を上回れば保温燃焼を停
止するように制御すると共に、上記各サイクルの保温燃
焼間のインターバル時間を少なくとも長短２種類設定
し、上記温度センサ１４で検出した缶体温度の高低によ
ってインターバル時間を長短いずれかに切替えることが
できるように制御するソフトウエアが内蔵されている。
なお、１６は炎検知器であって、バーナ機構６を構成す
る燃焼管の一部に近接され、燃焼管からのバーナ炎の有
無を検知するものである。[0013] Then, the control unit 15, if the can body temperature detected by the temperature sensor 14 is below the thermal insulation combustion start temperature T S starts incubated combustion by-cycle combustion, the can body temperature kept combustion stop temperature If the temperature exceeds T E , control is performed so as to stop the insulated combustion, and at least two types of interval time between the insulated combustion in each cycle are set, and the interval time is determined by the level of the can body temperature detected by the temperature sensor 14. Software for controlling so that it can be switched between long and short is built in.
Reference numeral 16 denotes a flame detector, which is located near a part of the combustion tube constituting the burner mechanism 6 and detects the presence or absence of burner flame from the combustion tube.
【００１４】しかして、上記保温機能付き給湯器によれ
ば、図２で示すように、保温燃焼機能動作時において、
例えば０．３秒間保温燃焼すると（ａ）、１分間の短め
のインターバル時間をおく（Ｈ2 ）。１分間のインター
バル時間経過後、続いて０．３秒間保温燃焼する
（ｂ）。この段階で缶体温度がインターバル切替温度Ｔ
I を上回るので、次のインターバル時間（Ｈ3 ）につい
ては、インターバル時間が長めのものに切り替わる。即
ち、例えば２分間と前回よりも長め（１分間）のインタ
ーバル時間がおかれることになる。そして次の保温燃焼
（ｃ）が行われている途中で、缶体温度は保温燃焼停止
温度ＴE に達し、保温燃焼が停止される。これによって
缶体温度が保温燃焼開始温度ＴS まで待機状態となる。
なお上記保温燃焼開始温度ＴS 及び保温燃焼停止温度Ｔ
E は、保温燃焼を行うことによって給湯開始初期に適温
水が給湯されるように、設定出湯温度等との関係で予め
実験によって適当な値に定めておくことができる。また
インターバル切替温度ＴI は、コールドスタート時のよ
うに缶体温度が低温から保温燃焼を開始させる場合と、
再給湯時等の缶体温度がある程度高温から保温燃焼を開
始させる場合とで、インターバル時間の長さを切替える
ための基準となる温度であって、同様に予め実験により
適当な値を定めておくことができる。即ち、缶体温度が
インターバル切替温度ＴI よりも低い時は、インターバ
ル時間を短く設定してサイクルによる保温燃焼を行うこ
とにより素早く温度を立ち上げ、高い場合はそれよもり
長めにインターバル時間を設定する。Thus, according to the water heater with the heat retaining function, as shown in FIG.
For example, when the heat is burned for 0.3 seconds (a), a shorter interval time of 1 minute is set (H 2 ). After the elapse of the one minute interval, the combustion is continued for 0.3 second (b). At this stage, the can body temperature becomes the interval switching temperature T
Since it exceeds I , the next interval time (H 3 ) is switched to a longer interval time. That is, for example, an interval time longer than the previous time (1 minute) is set to 2 minutes. Then in the course of the next insulation combustion (c) is being performed, can body temperature reaches insulation combustion stop temperature T E, insulation combustion is stopped. As a result, the can body temperature is in a standby state until the warm combustion start temperature T S.
Note that the above-mentioned warm combustion start temperature T S and the warm combustion stop temperature T
E can be set in advance to an appropriate value by experiment in relation to a set tapping temperature or the like so that hot water is supplied at an early stage of hot water supply by performing warming combustion. Further, the interval switching temperature T I is determined when the temperature of the can body starts to be maintained at a low temperature as in a cold start, and
This is a reference temperature for switching the length of the interval time when the insulated combustion is started from a certain high temperature of the can body at the time of hot water supply and the like, and an appropriate value is similarly determined in advance by experiments. be able to. That is, when the can body temperature is lower than the interval switching temperature T I , the interval time is set to a short time, and the temperature is quickly raised by performing insulated combustion by a cycle, and when it is high, the interval time is set longer than that. I do.
【００１５】このように、保温燃焼（ａ）→インターバ
ル時間（Ｈ2 ）→保温燃焼（ｂ）→インターバル時間
（Ｈ3 ）→保温燃焼（ｃ）という一連の動作が上記制御
部１５に内蔵したソフトウエアによってマイコン制御さ
れるようになっているが、動作始期ａから動作終期ｃに
至る１スパン（Ｈ1 ）内での各保温燃焼間のインターバ
ル時間を缶体温度に応じて変更することによって、効率
の良い保温を行うことができると共に、一定時間内での
保温燃焼の回数を従来の給湯器における保温燃焼の回数
に比べて少なくすることができる。これによって、給湯
器の耐用年数を増加させることができる。As described above, a series of operations of warm combustion (a) → interval time (H 2 ) → warm combustion (b) → interval time (H 3 ) → warm combustion (c) is built in the control unit 15. The microcomputer is controlled by software, but by changing the interval time between each insulated combustion within one span (H 1 ) from the operation start a to the operation end c according to the can body temperature. In addition, efficient heat retention can be performed, and the number of times of warming combustion within a certain time can be reduced as compared with the number of times of warming combustion in a conventional water heater. Thereby, the service life of the water heater can be increased.
【００１６】次に、本発明の第２の実施の形態例にかか
る保温機能付き給湯器の構成について説明する。その基
本的構成は図１で示す第１の実施の形態例と同様であ
り、その詳しい説明は省略する。特に、第１の実施の形
態例によるものとの相違点は、制御部１５に内蔵したソ
フトウエアにある。即ち第２の実施の形態例にかかる保
温機能付き給湯器では、保温運転継続時間内での保温燃
焼回数に制限を設け、制限回数を超えた場合にはそれ以
上保温燃焼を行わないように制御するソフトウエアを制
御部１５に内蔵した。Next, the configuration of a water heater with a heat retaining function according to a second embodiment of the present invention will be described. Its basic configuration is the same as that of the first embodiment shown in FIG. 1, and a detailed description thereof will be omitted. In particular, the difference from the first embodiment is in the software built in the control unit 15. That is, in the water heater with the heat retention function according to the second embodiment, the number of times of the heat retention combustion is set within the duration of the heat retention operation, and if the number of times exceeds the limit, the control is performed so that the heat retention combustion is not performed any more. The software for performing this is incorporated in the control unit 15.
【００１７】しかして、上記保温機能付き給湯器によれ
ば、図３で示すように、保温運転中において、例えば保
温運転継続時間（Ｈ4 ）内での保温燃焼回数を３回以内
とする。従って１回目の保温燃焼（ｄ）により保温燃焼
停止温度ＴE に達した缶体温度が経時的に降下してい
き、保温燃焼開始温度ＴS に至ると、２回目の保温燃焼
（ｅ）が行われ、缶体温度は再び保温燃焼停止温度ＴE
に達する。この缶体温度が再び経時的に降下して保温燃
焼開始温度ＴS に至ると、３回目の保温燃焼（ｆ）が行
われ、缶体温度は再び保温燃焼停止温度ＴE に達する。
この際の缶体温度も経時的に降下するが、保温燃焼開始
温度ＴS に至り、該保温燃焼開始温度ＴSの温度を下回
ったとしても、既に制限回数（３回）を超えているの
で、もやは保温燃焼運転を行わない。そして、保温運転
継続時間（Ｈ4 ）が経過すると、新たに保温運転継続時
間（Ｈ4 ）が設定され、この時間（Ｈ4 ）内に制限回数
（３回）を上限とする保温燃焼が繰り返されることにな
る。このように上記保温機能付き給湯器によれば、予め
定めた保温運転継続時間（Ｈ4 ）内での保温燃焼の回数
が、予め設定した制限回数を超えることがない。よって
従来の給湯器における保温燃焼に比べて、保温燃焼の回
数がいたずらに増加するのを抑制することができ、給湯
器の耐用年数を増加させることができる。Thus, according to the water heater with the heat retention function, as shown in FIG. 3, during the heat retention operation, for example, the number of times of the heat retention combustion within the heat retention operation continuation time (H 4 ) is set to three or less. Thus can body temperature reached warmth combustion stop temperature T E by first insulation combustion (d) it is gradually over time drops, and reaches the heat insulating combustion start temperature T S, 2 nd heat insulating combustion (e) is Then, the can body temperature is again reduced to the warming combustion stop temperature T E
Reach When the can body temperature reaches again over time drops to kept burning start temperature T S, insulation combustion of third (f) is performed, can body temperature reaches warmth combustion stop temperature T E again.
Can body temperature during this is also over time drops, leading to insulation combustion start temperature T S, even below the temperature of the heat insulating combustion initiation temperature T S, since already exceeded the limit number of times (3 times) The haze does not perform the warm combustion operation. When the warming operation continuation time (H 4 ) elapses, a new warming operation continuation time (H 4 ) is set, and within this time (H 4 ), the warming combustion with the upper limit of the limited number of times (three times) is repeated. Will be. As described above, according to the water heater with the heat retaining function, the number of times of the heat retention combustion within the predetermined temperature keeping operation continuation time (H 4 ) does not exceed the preset limit number. Therefore, it is possible to suppress the number of times of the warming combustion from being unnecessarily increased as compared with the warming combustion in the conventional water heater, and it is possible to increase the service life of the water heater.
【００１８】次に、本発明の第３の実施の形態例にかか
る保温機能付き給湯器の構成について説明する。その基
本的構成は図１で示す第１及び第２の実施の形態例と同
様であり、その詳しい説明は省略する。特に第１及び第
２の実施の形態例によるものとの相違点は、制御部１５
に内蔵したソフトウエアにある。即ち、第３の実施の形
態例にかかる保温機能付き給湯器では、保温燃焼の際の
バーナへの着火動作における再着火動作時間を通常の給
湯燃焼の際のバーナへの着火動作における再着火動作時
間よりも短く、且つ保温燃焼の際のバーナへの着火動作
における再着火動作回数を通常の給湯燃焼の際のバーナ
への着火動作における再着火動作回数よりも少なくする
ように制御するソフトウエアを内蔵した。Next, the configuration of a water heater with a heat retaining function according to a third embodiment of the present invention will be described. The basic configuration is the same as in the first and second embodiments shown in FIG. 1, and a detailed description thereof will be omitted. In particular, the difference from the first and second embodiments is that the control unit 15
In the built-in software. That is, in the water heater with the heat retention function according to the third embodiment, the re-ignition operation time in the ignition operation to the burner at the time of the warm combustion is set to the re-ignition operation in the ignition operation to the burner at the time of the normal hot water combustion. Shorter than the time, and software that controls the number of re-ignition operations in the ignition operation to the burner at the time of insulated combustion to be smaller than the number of re-ignition operations in the ignition operation to the burner at the time of normal hot water supply combustion. Built-in.
【００１９】しかして、上記構成にかかる保温機能付き
給湯器によれば、給湯燃焼におけるバーナへの着火シー
ケンスでは、図４の（Ｂ）に示すように、例えば初期５
秒間の着火動作１回とそれで着火が確認されなかった場
合に更に２秒間の再着火動作を行い、それでも着火しな
い場合は更にもう１回、２秒間の再着火動作を行う。こ
れに対して、保温燃焼時におけるバーナへの着火シーケ
ンスでは、図４の（Ａ）で示すように、例えば着火動作
のうちで初期の着火動作時間を５秒間から２秒間に短縮
し、且つバーナの再着火動作回数を２秒間で１回として
いる。このように、図４の（Ａ）と（Ｂ）の対比からも
明らかな通り、上記構成にかかる保温機能付き給湯器
（Ａの場合）では、保温燃焼における着火動作及び再着
火動作時間を短縮し、また再着火動作回数を少なくした
ので、炎検知器１６の故障や火移り不良（炎検知器１６
によってバーナ炎の有無を検知する燃焼管のみ点火しな
い場合）が発生した場合、例え熱交換器に水流が生じな
い保温運転中での燃焼であっても、前記着火動作や再着
火動作による熱交換器内部の圧力上昇が抑制され、耐久
性と安全性を向上させることができる。Thus, according to the water heater with the heat retention function according to the above configuration, in the ignition sequence for the burner in the hot water combustion, for example, as shown in FIG.
One ignition operation for two seconds and a re-ignition operation for another two seconds are performed if no ignition is confirmed. If ignition is still not performed, a re-ignition operation is performed once more for two seconds. On the other hand, in the ignition sequence to the burner at the time of warming combustion, as shown in FIG. 4A, for example, the initial ignition operation time in the ignition operation is reduced from 5 seconds to 2 seconds, and the burner is burned. Is set to 1 in 2 seconds. Thus, as is clear from the comparison between FIGS. 4A and 4B, in the water heater with the heat retaining function according to the above configuration (in the case of A), the time for the ignition operation and the time for the re-ignition operation in the heat retaining combustion is reduced. In addition, since the number of re-ignition operations is reduced, the failure of the flame detector 16
If only the combustion tube that detects the presence or absence of burner flame is not ignited), heat exchange by the ignition operation or the re-ignition operation is performed even if the combustion is performed during the heat-retention operation in which no water flow occurs in the heat exchanger. Pressure rise inside the vessel is suppressed, and durability and safety can be improved.
【００２０】[0020]
【発明の効果】本発明は以上のように構成され、請求項
１に記載の保温機能付き給湯器によれば、入水管路と、
出湯管路と、熱交換器とバーナ機構とを含む缶体と、前
記熱交換器内の水温を検出するための温度センサとを少
なくとも備え、給湯を行っていない場合においても前記
バーナ機構を燃焼させて保温運転を行うことができるよ
うにした保温機能付き給湯器であって、保温運転中にお
いて、上記温度センサで検出した熱交換器内の水温が保
温燃焼開始温度を下回ればサイクル燃焼による保温燃焼
を開始し、上記熱交換器内の水温が保温燃焼停止温度を
上回れば保温燃焼を停止するように制御するにあたり、
上記各サイクルの保温燃焼間のインターバル時間を少な
くとも長短２種類以上設定すると共にインターバル切替
温度を設定し、上記温度センサで検出した熱交換器内の
水温が該インターバル切替温度を超えている場合には長
めのインターバル時間に切替え、超えていない場合には
短めのインターバル時間に切替えるように制御する制御
部を設けたので、保温燃焼のインターバルを熱交換器内
の水温に応じて変更させることができ、よって熱交換器
内の水温に応じた効率の良い保温ができると共に、保温
燃焼の回数を従来の給湯器における保温燃焼の回数に比
べて少なくすることができ、長期的に見た場合の保温燃
焼回数を大幅に減らすことが可能となり、給湯器の耐用
年数を増加させることができる。また請求項２に記載の
保温機能付き給湯器によれば、入水管路と、出湯管路
と、熱交換器とバーナ機構とを含む缶体と、前記熱交換
器内の水温を検出するための温度センサとを少なくとも
備え、給湯を行っていない場合においても前記バーナ機
構を燃焼させて保温運転を行うことができるようにした
保温機能付き給湯器であって、保温運転中において、上
記温度センサで検出した熱交換器内の水温が保温燃焼開
始温度を下回れば保温燃焼を開始し、上記熱交換器内の
水温が保温燃焼停止温度を上回れば保温燃焼を停止する
ように制御するにあたり、一定の保温運転継続時間を設
定すると共に該保温運転継続時間内に行われる保温燃焼
に一定の回数制限を設け、上記保温燃焼回数が制限回数
を超えた場合には保温燃焼を行わないように制御する制
御部を設けたので、上記一定の保温運転継続時間内での
保温燃焼が制限回数を超えることがなく、従来の給湯器
における保温燃焼に比べて保温燃焼回数がいたずらに増
加するのを抑制することができ、給湯器の耐用年数を増
加させることができる。また請求項３に記載の保温機能
付き給湯器によれば、入水管路と、出湯管路と、熱交換
器とバーナ機構とを含む缶体と、前記熱交換器内の水温
を検出するための温度センサとを少なくとも備え、給湯
を行っていない場合においても前記バーナ機構を燃焼さ
せて保温運転を行うことができるようにした保温機能付
き給湯器であって、保温運転中において、上記温度セン
サで検出した熱交換器内の水温が保温燃焼開始温度を下
回れば保温燃焼を開始し、上記熱交換器内の水温が保温
燃焼停止温度を上回れば保温燃焼を停止するように制御
するにあたり、上記保温燃焼時のバーナの着火動作時間
を給湯燃焼時の着火動作時間よりも短く、且つ保温燃焼
時のバーナの再着火動作回数を給湯燃焼時の再着火動作
回数よりも少なくなるように制御する制御部を設けたの
で、保温燃焼時において例え着火確認のための炎検知器
に故障があったり、また火移り不良（炎検知する燃焼管
のみ点火しない場合）が発生した場合であっても、熱交
換器内部の圧力上昇が抑制され、耐久性と安全性を向上
させることができる。The present invention is configured as described above, and according to the water heater with the heat retaining function according to the first aspect, the water inlet pipe,
A hot water supply line, a can body including a heat exchanger and a burner mechanism, and at least a temperature sensor for detecting a water temperature in the heat exchanger, and the burner mechanism is burned even when hot water is not supplied. A water heater with a heat retaining function that is capable of performing a heat retaining operation by performing a heat retaining operation. In the heat retaining operation, if the water temperature in the heat exchanger detected by the temperature sensor is lower than the thermal combustion start temperature, the heat retention by cycle combustion is performed. In starting the combustion, in controlling to stop the insulated combustion if the water temperature in the heat exchanger exceeds the insulated combustion stop temperature,
If at least two types of interval time between the insulated combustion of each cycle are set, the interval switching temperature is set, and the water temperature in the heat exchanger detected by the temperature sensor exceeds the interval switching temperature. A control unit is provided to switch to a longer interval time, and to control to switch to a shorter interval time if it does not exceed, so that the interval of warm combustion can be changed according to the water temperature in the heat exchanger, Therefore, it is possible to keep the heat efficiently in accordance with the water temperature in the heat exchanger, and to reduce the number of times of the warming combustion compared to the number of the times of the warming combustion in the conventional water heater. The number of times can be greatly reduced, and the service life of the water heater can be increased. According to the water heater with a heat retaining function of claim 2, in order to detect a water temperature in the heat exchanger, a can body including a water inlet pipe, a hot water pipe, a heat exchanger and a burner mechanism. A water heater with a heat retaining function, wherein at least the temperature sensor is provided so that the burner mechanism can be burned to perform a heat retaining operation even when hot water is not supplied. In controlling to start the insulated combustion when the water temperature in the heat exchanger detected at the temperature is lower than the insulated combustion start temperature, and to stop the insulated combustion when the water temperature in the heat exchanger exceeds the insulated combustion stop temperature, Is set, and a fixed number of times is set for the warming combustion performed during the warming operation continuation time. If the number of times of the warming combustion exceeds the limit number, the warming combustion is controlled not to be performed. Since the control unit is provided, the number of times of the heat-retention combustion within the above-mentioned constant heat-retention operation continuation time does not exceed the limit number, and the number of times of the heat-retention combustion is prevented from being unnecessarily increased as compared with the case of the conventional heat-retention water heater. Can increase the service life of the water heater. According to the water heater with a heat retaining function of claim 3, in order to detect a water temperature in the heat exchanger, a can body including a water inlet pipe, a hot water pipe, a heat exchanger and a burner mechanism. A water heater with a heat retaining function, wherein at least the temperature sensor is provided so that the burner mechanism can be burned to perform a heat retaining operation even when hot water is not supplied. In controlling to start the insulated combustion when the water temperature in the heat exchanger detected at the temperature is lower than the insulated combustion start temperature, and to stop the insulated combustion when the water temperature in the heat exchanger is higher than the insulated combustion stop temperature, Control to control the burner ignition operation time during warm combustion to be shorter than the ignition operation time during hot water supply combustion, and to control the number of reignition operations of the burner during warm combustion to be less than the number of reignition operations during hot water combustion. Even if there is a failure in the flame detector to check the ignition during warm combustion, or if there is a poor fire transfer (when only the combustion tube for flame detection does not ignite), heat exchange is performed. Pressure rise inside the vessel is suppressed, and durability and safety can be improved.
【図１】本発明の第１ないし第３の実施の形態例に共通
する保温機能付き給湯器の構成図である。FIG. 1 is a configuration diagram of a water heater with a heat retention function that is common to the first to third embodiments of the present invention.
【図２】本発明の第１の実施の形態例による保温機能付
き給湯器における保温燃焼とインターバル時間との関係
を説明するためのグラフである。FIG. 2 is a graph for explaining a relationship between warming combustion and an interval time in the water heater with a warming function according to the first embodiment of the present invention.
【図３】本発明の第２の実施の形態例による保温機能付
き給湯器における保温運転継続時間と保温燃焼回数との
関係を説明するためのグラフである。FIG. 3 is a graph for explaining the relationship between the duration of warming operation and the number of times of warming combustion in a water heater with a warming function according to a second embodiment of the present invention.
【図４】本発明の第３の実施の形態例による保温機能付
き給湯器における着火動作及び再着火動作と着火動作時
間の関係を示すグラフである。FIG. 4 is a graph showing a relationship between an ignition operation, a re-ignition operation, and an ignition operation time in a water heater with a heat retaining function according to a third embodiment of the present invention.
【図５】従来の保温機能付き給湯器の概略構成図であ
る。FIG. 5 is a schematic configuration diagram of a conventional water heater with a heat retaining function.
【図６】従来の保温機能付き給湯器における保温燃焼と
インターバル時間との関係を説明するためのグラフであ
る。FIG. 6 is a graph for explaining the relationship between warming combustion and interval time in a conventional water heater with a warming function.
【図７】従来の保温機能付き給湯器における保温運転継
続時間と保温燃焼回数との関係を説明するためのグラフ
である。FIG. 7 is a graph for explaining the relationship between the duration of warming operation and the number of times of warming combustion in a conventional water heater with a warming function.
１ 入水管路 ２ 出湯管路 ３ 給湯管路 ４ 缶体 ５ 熱交換器 ６ バーナ機構 １４ 温度センサ １５ 制御部 １６ 炎検知器 ＴS 保温燃焼開始温度 ＴE 保温燃焼停止温度 ＴI インターバル切替温度DESCRIPTION OF SYMBOLS 1 Inlet line 2 Outlet line 3 Hot line 4 Can 5 Heat exchanger 6 Burner mechanism 14 Temperature sensor 15 Control part 16 Flame detector T S Insulated combustion start temperature T E Insulated combustion stop temperature T I interval switching temperature
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辻 栄一 兵庫県神戸市中央区江戸町93番地 株式会 社ノーリツ内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Eiichi Tsuji 93, Edocho, Chuo-ku, Kobe-shi, Hyogo Pref.
Claims (3)
ーナ機構とを含む缶体と、前記熱交換器内の水温を検出
するための温度センサとを少なくとも備え、給湯を行っ
ていない場合においても前記バーナ機構を燃焼させて保
温運転を行うことができるようにした保温機能付き給湯
器であって、 保温運転中において、上記温度センサで検出した熱交換
器内の水温が保温燃焼開始温度を下回ればサイクル燃焼
による保温燃焼を開始し、上記熱交換器内の水温が保温
燃焼停止温度を上回れば保温燃焼を停止するように制御
するにあたり、上記各サイクルの保温燃焼間のインター
バル時間を少なくとも長短２種類以上設定すると共にイ
ンターバル切替温度を設定し、上記温度センサで検出し
た熱交換器内の水温が該インターバル切替温度を超えて
いる場合には長めのインターバル時間に切替え、超えて
いない場合には短めのインターバル時間に切替えるよう
に制御する制御部を設けたことを特徴とする保温機能付
き給湯器。1. A hot water supply system comprising at least a water inlet pipe, a hot water pipe, a can body including a heat exchanger and a burner mechanism, and a temperature sensor for detecting a water temperature in the heat exchanger. A water heater with a heat retaining function capable of performing a heat retaining operation by burning the burner mechanism even in a case where the water temperature in the heat exchanger is detected by the temperature sensor during the heat retaining operation. When the temperature is lower than the combustion start temperature, warm combustion by cycle combustion is started, and when the water temperature in the heat exchanger is higher than the warm combustion stop temperature, the warm combustion is stopped. At least two types of time are set, long and short, and an interval switching temperature is set, and the water temperature in the heat exchanger detected by the temperature sensor exceeds the interval switching temperature. Thermal insulation function water heater, characterized in that a control unit for controlling to switch the short interval time when the focus switches to longer interval time does not exceed.
ーナ機構とを含む缶体と、前記熱交換器内の水温を検出
するための温度センサとを少なくとも備え、給湯を行っ
ていない場合においても前記バーナ機構を燃焼させて保
温運転を行うことができるようにした保温機能付き給湯
器であって、 保温運転中において、上記温度センサで検出した熱交換
器内の水温が保温燃焼開始温度を下回れば保温燃焼を開
始し、上記熱交換器内の水温が保温燃焼停止温度を上回
れば保温燃焼を停止するように制御するにあたり、一定
の保温運転継続時間を設定すると共に該保温運転継続時
間内に行われる保温燃焼に一定の回数制限を設け、上記
保温燃焼回数が制限回数を超えた場合には保温燃焼を行
わないように制御する制御部を設けたことを特徴とする
保温機能付き給湯器。2. A hot water supply system comprising at least a water inlet pipe, a hot water pipe, a can body including a heat exchanger and a burner mechanism, and a temperature sensor for detecting a water temperature in the heat exchanger. A water heater with a heat retaining function capable of performing a heat retaining operation by burning the burner mechanism even in a case where the water temperature in the heat exchanger is detected by the temperature sensor during the heat retaining operation. When the temperature is lower than the combustion start temperature, the heat-retention combustion is started, and when the water temperature in the heat exchanger is higher than the heat-retention combustion stop temperature, the heat-retention combustion is stopped. A heat insulation characterized in that a fixed number of times is set for the insulated combustion performed within the operation continuation time, and a control unit that controls so as not to perform the insulated combustion when the number of times of the insulated combustion exceeds the limited number is provided. Water heater with a capacity.
ーナ機構とを含む缶体と、前記熱交換器内の水温を検出
するための温度センサとを少なくとも備え、給湯を行っ
ていない場合においても前記バーナ機構を燃焼させて保
温運転を行うことができるようにした保温機能付き給湯
器であって、 保温運転中において、上記温度センサで検出した熱交換
器内の水温が保温燃焼開始温度を下回れば保温燃焼を開
始し、上記熱交換器内の水温が保温燃焼停止温度を上回
れば保温燃焼を停止するように制御するにあたり、上記
保温燃焼時のバーナの着火動作時間を給湯燃焼時の着火
動作時間よりも短く、且つ保温燃焼時のバーナの再着火
動作回数を給湯燃焼時の再着火動作回数よりも少なくな
るように制御する制御部を設けたことを特徴とする保温
機能付き給湯器。3. A hot water supply system comprising at least a water inlet pipe, a hot water pipe, a can body including a heat exchanger and a burner mechanism, and a temperature sensor for detecting a water temperature in the heat exchanger. A water heater with a heat retaining function capable of performing a heat retaining operation by burning the burner mechanism even in a case where the water temperature in the heat exchanger is detected by the temperature sensor during the heat retaining operation. When controlling to stop warming combustion when the water temperature in the heat exchanger exceeds the warming stop temperature when the temperature of the water in the heat exchanger exceeds the warming stop temperature, the burner ignition operation time during the warming combustion is supplied. A heat retaining function characterized by providing a control unit that is shorter than the ignition operation time during combustion and that controls the number of re-ignition operations of the burner at the time of warm combustion to be less than the number of re-ignition operations at the time of hot water combustion. Can water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367329A JPH11182931A (en) | 1997-12-24 | 1997-12-24 | Hot-water supplier with heat preservation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9367329A JPH11182931A (en) | 1997-12-24 | 1997-12-24 | Hot-water supplier with heat preservation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11182931A true JPH11182931A (en) | 1999-07-06 |
Family
ID=18489047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9367329A Pending JPH11182931A (en) | 1997-12-24 | 1997-12-24 | Hot-water supplier with heat preservation function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11182931A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160223210A1 (en) * | 2007-06-28 | 2016-08-04 | Westcast, Inc. | Modulating boiler system |
-
1997
- 1997-12-24 JP JP9367329A patent/JPH11182931A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160223210A1 (en) * | 2007-06-28 | 2016-08-04 | Westcast, Inc. | Modulating boiler system |
| US10024553B2 (en) * | 2007-06-28 | 2018-07-17 | Westcast, Inc. | Modulating boiler system |
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