JP2000104994A - Hot water heater having function of heat insulating operation - Google Patents

Hot water heater having function of heat insulating operation

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Publication number
JP2000104994A
JP2000104994A JP10288874A JP28887498A JP2000104994A JP 2000104994 A JP2000104994 A JP 2000104994A JP 10288874 A JP10288874 A JP 10288874A JP 28887498 A JP28887498 A JP 28887498A JP 2000104994 A JP2000104994 A JP 2000104994A
Authority
JP
Japan
Prior art keywords
temperature
combustion
water heater
hot water
reference value
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
Application number
JP10288874A
Other languages
Japanese (ja)
Other versions
JP3539230B2 (en
Inventor
Akihiro Yanada
晃宏 梁田
Hiroki Obara
浩樹 小原
Hidekazu Fukui
秀和 福井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noritz Corp
Original Assignee
Noritz Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Noritz Corp filed Critical Noritz Corp
Priority to JP28887498A priority Critical patent/JP3539230B2/en
Publication of JP2000104994A publication Critical patent/JP2000104994A/en
Application granted granted Critical
Publication of JP3539230B2 publication Critical patent/JP3539230B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a hot water heater having a function of heat insulating operation which does not so much bring about lowering of the property of heat insulating operation of the hot water heater, and ensures durability and safety. SOLUTION: A hot water heater having a function of heat insulating operation at least comprises a cold water supply pipe 1, a hot water discharge pipe 2, a can 4 containing a heat exchanger 5 and a burner mechanism 6, and a temperature sensor 14 for detecting water temperature in the heat exchanger 5, and also comprises a function of heat insulating operation for carrying out heat insulating operation even when hot water is not supplied, by bringing the burner mechanism 6 into a combusting status. The hot water heater controls itself so that, during heat insulating operation, heat insulating combustion is started when the detected water temperature in the heat exchanger 5 becomes not more than the temperature for starting heat insulating combustion, and that heat insulating combustion is stopped when the water temperature in the heat exchanger 5 becomes not less than the temperature for stopping heat insulating combustion. There is provided a control unit 15 for changing a heat insulating combustion starting temperature, or both of the heat insulating combustion starting temperature and a heat insulating combustion stopping temperature, when the age of the hot water heater becomes a certain standard value or more, to temperatures which are lower than the temperatures in the case where the age is less than the specific value.

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
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
いようにすることができる保温運転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 retaining operation performed during a hot water supply standby to appropriately raise the temperature of water in and around a heat exchanger so that cold water does not flow out even at the beginning of the hot water supply. The present invention relates to a water heater with a warming operation function that can perform the operation.

【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、管内の水を適当に加温させておくこ
とで、給湯性能を向上させる機能(以下、保温運転機能
という)を備えた瞬間湯沸器等の保温運転機能付き給湯
器が提供されている。これは給湯器の保温運転機能によ
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や再給湯時の初
期において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。この種の保温
運転機能付き給湯器においては、保温運転のスイッチが
オンの状態において、熱交換器等の配管内の水温が予め
設定された保温燃焼開始温度以下になるとバーナ等によ
る保温燃焼を行い、配管内の水温が予め設定された保温
燃焼停止温度に達すれば保温燃焼を停止するというサイ
クルを繰り返す構成となっている。
2. Description of the Related Art Conventionally, even during standby for hot water supply, that is, even when hot water is not being supplied, a function of improving the hot water supply performance by appropriately heating the water in a pipe (hereinafter referred to as a heat retention operation function). There is provided a water heater having a warming operation function such as an instantaneous water heater provided with a water heater. This is because the warming function of the water heater performs combustion during the cold start and during the standby for re-hot water supply to raise the temperature of the heat exchanger and the surrounding water appropriately. The purpose is to prevent cold water from flowing out and to quickly obtain the set temperature. In a water heater with this type of heat retaining operation function, when the temperature of the water in the pipes of the heat exchanger or the like becomes equal to or lower than a preset temperature for preserving heat retention while the heat retaining operation switch is on, the heat retention combustion is performed by a burner or the like. When the water temperature in the pipe reaches a preset temperature for stopping the warming combustion, the cycle of stopping the warming combustion is repeated.

【0003】[0003]

【発明が解決しようとする課題】ところが、上記のよう
な従来の保温運転機能付き給湯器においては、通常の給
湯運転におけるバーナの繰り返し使用に加えて、保温運
転時においても断続的にバーナの燃焼が繰り返して行わ
れることになるため、給湯器全体としてのバーナの繰り
返し使用(繰り返し燃焼)が増えるため、着火用部品や
その他の部品、部材の耐久性や寿命の低下を招くという
問題点があった。
However, in the above-described conventional water heater with a heat retaining operation function, in addition to the repeated use of the burner in a normal hot water supply operation, the burner burns intermittently even during the heat retaining operation. Is repeated, so that the repeated use (repeated combustion) of the burner as the whole water heater increases, which causes a problem that the durability and life of ignition parts and other parts and members are reduced. Was.

【0004】そこで、本発明は上記従来装置における問
題点を解消し、給湯器の保温運転性能の低下をあまりき
たすことなく、耐久性及び安全性を確保することができ
る保温運転機能付き給湯器の提供を課題とする。
Accordingly, the present invention solves the above-mentioned problems of the conventional apparatus, and provides a water heater with a heat retaining operation function that can ensure durability and safety without causing much deterioration in the heat retaining operation performance of the water heater. Providing is an issue.

【0005】[0005]

【課題を解決するための手段】上記課題を達成するた
め、本発明の保温運転機能付き給湯器は、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保温運転機能を
備えており、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以下になれ
ば保温燃焼を開始し、上記熱交換器内の水温が保温燃焼
停止温度以上になれば保温燃焼を停止するように制御す
る保温運転機能付き給湯器であって、給湯器の使用年数
が一定の基準値以上になると、前記保温燃焼開始温度、
若しくは保温燃焼開始温度と保温燃焼停止温度の両方
を、前記基準値未満の場合における温度よりも低い温度
に変更させる制御部を設けたことを第1の特徴としてい
る。また本発明の保温運転機能付き給湯器は、上記第1
の特徴に加えて、給湯器の使用年数の代わりに、給湯器
の給湯燃焼の積算回数が一定の基準値以上になると、保
温燃焼開始温度、若しくは保温燃焼開始温度と保温燃焼
停止温度の両方を、基準値未満の場合における温度より
も低い温度に変更させる制御部を設けたことを第2の特
徴としている。また本発明の保温運転機能付き給湯器
は、上記第1の特徴に加えて、給湯器の使用年数の代わ
りに、給湯器の給湯燃焼の積算時間が一定の基準値以上
になると、保温燃焼開始温度、若しくは保温燃焼開始温
度と保温燃焼停止温度の両方を、基準値未満の場合にお
ける温度よりも低い温度に変更させる制御部を設けたこ
とを第3の特徴としている。さらに本発明の保温運転機
能付き給湯器は、上記第1〜3の何れかの特徴に加え
て、基準値よりも大きい第2の基準値を設け、該第2の
基準値以上になると保温運転機能をキャンセルして警告
表示させる制御部を設けたことを第4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 operation function of the present invention comprises:
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 heat-retaining operation function for performing a heat-retaining operation is performed, and during the heat-retaining operation, if the water temperature in the heat exchanger detected by the temperature sensor becomes equal to or lower than the heat-retention combustion start temperature, the heat-retention combustion is started. A water heater with a warming operation function that controls so as to stop the warming combustion when the water temperature in the water becomes equal to or higher than the warming combustion stop temperature, and when the number of years of use of the water heater exceeds a predetermined reference value, the warming combustion start temperature ,
Alternatively, a first feature is that a control unit is provided that changes both the warm-burning start temperature and the warm-burn stop temperature to a temperature lower than the temperature when the temperature is lower than the reference value. Further, the water heater with a warming operation function of the present invention is characterized in that:
In addition to the features of the above, instead of the number of years of use of the water heater, when the cumulative number of times of hot water combustion of the water heater becomes equal to or more than a certain reference value, the warmed combustion start temperature, or both the warmed combustion start temperature and the warmed combustion stop temperature are changed. The second feature is that a control unit for changing the temperature to a temperature lower than the temperature when the temperature is less than the reference value is provided. Further, in addition to the first feature, the water heater with the heat retaining operation function of the present invention has a feature that, when the cumulative time of the hot water combustion of the water heater becomes equal to or more than a predetermined reference value instead of the number of years of use of the water heater, the warm water combustion starts. A third feature is that a control unit is provided for changing the temperature, or both the warming start temperature and the warming stop temperature, to a temperature lower than the temperature when the temperature is lower than the reference value. Further, the water heater with the warming operation function of the present invention, in addition to any one of the above first to third features, provides a second reference value larger than the reference value, and when the water temperature exceeds the second reference value, the warming operation is performed. A fourth feature is that a control unit for canceling the function and displaying a warning is provided.

【0006】上記第1の特徴において、給湯器の使用年
数が一定の基準値以上になるとは、例えば、使用年数が
基準値として10年以上になるということである。前記
10年はこの値に限定されるものではなく、予め実験に
よってその給湯器の機種等に応じた値を設定しておくこ
とができる。前記基準値を以上になることで、保温燃焼
開始温度がそれ以前の元の温度よりも低くされること
で、保温燃焼停止温度から保温燃焼開始温度に下がるま
での時間がより長くなり、その分だけ保温燃焼の回数が
少なくなる。また、保温燃焼開始温度と保温燃焼停止温
度の両方がそれ以前の元の各温度よりも低くされること
で、例え保温燃焼開始温度と保温燃焼停止温度との温度
差が同じであっても、周囲の環境温度との差そのものが
小さくなるので、保温燃焼開始温度まで下がるのに要す
る時間がそれだけ長くなり、その分だけ保温燃焼の回数
を少なくすることができる。保温燃焼の回数が減ること
で、バーナ或いはその周辺部品、部材が寿命に達するの
を遅らすことができ、その分、給湯器の寿命を延ばすこ
とができる。勿論、保温運転の機能は、基準値に至るま
では十分なる保温機能を果たすと共に、基準値以上とな
っても、保温運転の機能は多少低下するものの、それな
りの保温機能を引き続き保持することができる。上記第
2の特徴において、給湯器の給湯燃焼の積算回数が一定
の基準値以上とになるとは、例えば、給湯器の使用年数
が10年以上となるのに匹敵するような給湯燃焼の積算
回数になるということである。基準値としての積算回数
をいくらにするかは、予め実験によってその給湯器の機
種等に応じた値を設定しておくことができる。上記第3
の特徴において、給湯器の給湯燃焼の積算時間が一定の
基準値以上とになるとは、例えば、給湯器の使用年数が
10年以上となるのに匹敵するような給湯燃焼の積算時
間になるということである。基準値としての給湯燃焼の
積算時間をいくらにするかは、予め実験によってその給
湯器の機種等に応じた値を設定しておくことができる。
上記第4の特徴においては、給湯器の使用年数や給湯器
の給湯燃焼の積算回数或いは給湯器の給湯燃焼の積算時
間が、第1の基準値を越えて更に第2の基準値以上にな
る場合には、保温運転機能をキャンセルすることで、保
温運転機能は果たせなくなってしまうが、給湯器そのも
のの寿命についてはさらにその寿命を延ばすことが可能
となる。
[0006] In the above-mentioned first characteristic, the term "the number of years of use of the water heater becomes equal to or more than a certain reference value" means, for example, that the number of years of use becomes equal to or more than 10 years as a reference value. The above-mentioned ten years is not limited to this value, and a value according to the type of the water heater can be set in advance by an experiment. By making the above-mentioned reference value or more, the warming combustion start temperature is made lower than the original temperature before it, so that the time until the warming combustion stop temperature drops to the warming combustion start temperature becomes longer, and only that much The number of warming combustions is reduced. In addition, since both the warm-burning start temperature and the warm-burn stop temperature are lower than the previous temperatures, even if the temperature difference between the warm-burn start temperature and the warm-burn stop temperature is the same, ambient Since the difference itself from the ambient temperature becomes smaller, the time required to lower the temperature to the warming combustion start temperature becomes longer, and the number of warming combustions can be reduced accordingly. By reducing the number of times of the heat-retention combustion, it is possible to delay the life of the burner or its peripheral parts and members, and to prolong the life of the water heater accordingly. Of course, the function of the heat-retaining operation performs a sufficient heat-retaining function up to the reference value, and even if the function becomes higher than the reference value, the function of the heat-retaining operation is slightly reduced, but the heat-retaining function can be maintained. it can. In the second feature, the cumulative number of times of hot water supply combustion of the water heater becomes equal to or more than a certain reference value, for example, the cumulative number of times of hot water supply combustion equivalent to the service life of the water heater of 10 years or more. It is to become. The value of the number of times of integration as the reference value can be set in advance by experiment to a value corresponding to the type of the water heater. The third above
In the feature of the above, the cumulative time of the hot water combustion of the water heater becomes equal to or more than the predetermined reference value, for example, the cumulative time of the hot water combustion that is equivalent to the service life of the water heater being 10 years or more. That is. The value of the accumulated time of hot water supply combustion as a reference value can be set in advance by experiment to a value according to the type of the water heater.
In the fourth feature, the number of years of use of the water heater, the cumulative number of times of the hot water supply combustion of the water heater, or the cumulative time of the hot water supply combustion of the water heater exceeds the first reference value and further exceeds the second reference value. In such a case, the warming operation function cannot be fulfilled by canceling the warming operation function, but the life of the water heater itself can be further extended.

【0007】[0007]

【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運転機能付き給湯器について図面
を参照して説明する。図1は本発明の実施の形態を示す
保温運転機能付き給湯器の全体構成図、図2は保温運転
中における、基準値の前後における保温燃焼停止温度T
E と保温燃焼開始温度Ts と熱交換器内の温度の変化を
模式的に示す図、図3は本発明による保温運転制御の実
施の形態例を示すフローチャートである。
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a water heater with a heat retaining operation function according to a first to third embodiments of the present invention. FIG. 1 is an overall configuration diagram of a water heater with a warming operation function showing an embodiment of the present invention, and FIG. 2 is a warming stop temperature T before and after a reference value during a warming operation.
Schematically shows a change in temperature in the E and kept burning start temperature T s and the heat exchanger, FIG 3 is a flowchart illustrating an embodiment of implementation of the maintenance operation control according to the present invention.

【0008】まず、本発明の保温運転機能付き給湯器の
機械的乃至機構的な実施の形態を図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4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内の水温及びその付近の水温(以下熱
交換器内の水温とする)を検出するための温度センサ1
4とから基本構成されている。制御部15は保温燃焼開
始温度や保温燃焼停止温度の設定を自動的に行い、また
後述する基準値の到来を監視し、その基準値の前後で前
記保温燃焼開始温度や保温燃焼停止温度の設定の変更を
自動的に行う等の保温運転の運転制御を行い、その他、
装置各部の制御を行うようになっている。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。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, a mechanical or mechanical embodiment of a water heater with a warming operation function of the present invention will be described with reference to FIG. The water heater includes at least a water inlet pipe 1, a tap water pipe 2, a hot water pipe 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 disposed in the bypass pipe 8 directly to the hot water supply pipe 3 without passing through the water supply pipe 3, and a water temperature sensor 10 provided in the water inlet pipe 1
And a water flow sensor 11, an overflow prevention adjusting valve 12 provided in the tapping pipe 2, a hot water supply temperature sensor 13 provided in the hot water supply pipe 3, and a heat exchange pipe constituting the heat exchanger 5. A temperature sensor 1 provided near the heat exchanger 5 such as a bend portion on both sides to detect a water temperature in the heat exchanger 5 and a water temperature in the vicinity thereof (hereinafter referred to as a water temperature in the heat exchanger).
4 basically. The control unit 15 automatically sets the warming start temperature and the warming stop temperature, monitors the arrival of a reference value described later, and sets the warming start temperature and the warming stop temperature before and after the reference value. Operation control of warming operation such as automatically changing
Each part of the device is controlled. Reference numeral 16 denotes a flame detector, which is close to a part of the combustion tube constituting the burner mechanism 6 and detects the presence or absence of a burner flame from the combustion tube. 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.

【0009】上記制御部15は、上記温度センサ14で
検出した熱交換器5内の水温が保温燃焼開始温度TS
下にな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 以上になれば保温燃焼
を停止するように制御すると共に、給湯器の給湯燃焼の
積算回数が基準値S1 より大きくなった場合に前記保温
燃焼開始温度TS と保温燃焼停止温度TE とを自動的に
新たな値に変更するようにしたソフトウエアが内蔵され
ている。
When the water temperature in the heat exchanger 5 detected by the temperature sensor 14 becomes equal to or lower than the insulated combustion start temperature T S , the controller 15 starts the insulated combustion by the cycle combustion, and the insulated body temperature becomes the insulated combustion. controls so as to stop the heat insulation combustion if more than stop temperature T E, the heat insulating combustion start temperature T S and heat retention combustion stop temperature when the accumulated number of the hot water supply combustion water heater is larger than the reference values S 1 software which is adapted to change the T E automatically new value is incorporated.

【0010】しかして、本実施の形態による保温運転機
能付き給湯器によれば、図2で示すように、制御部15
は、給湯器の給湯燃焼の積算回数が基準値S1 に達する
までは、保温燃焼開始温度TS1と保温燃焼停止温度TE1
をそれぞれ、例えばTS1=給湯設定温度+2℃、TE1
給湯設定温度+4℃とし、一方、給湯器の使用回数が増
えて、給湯燃焼の積算回数が基準値S1 に達した時点に
おいて、制御部15は保温燃焼開始温度TS2と保温燃焼
停止温度TE2をそれぞれ元の温度TS1、TE1よりも4℃
低くし、例えばTS2=給湯設定温度−2℃、TE2=給湯
設定温度に自動的に変更する。
Thus, according to the water heater with the heat retaining operation function according to the present embodiment, as shown in FIG.
It is, until the accumulated number of the water heater combustion water heater reaches the reference value S 1, the heat insulating combustion initiation temperature T S1 kept combustion stop temperature T E1
For example, T S1 = hot water supply set temperature + 2 ° C., T E1 =
The hot water supply set temperature is + 4 ° C. On the other hand, when the number of uses of the water heater increases and the cumulative number of hot water combustion reaches the reference value S 1 , the control unit 15 sets the warm combustion start temperature T S2 and the warm combustion stop temperature T 2. E2 is 4 ° C higher than the original temperature T S1 , T E1
For example, the temperature is automatically changed to T S2 = hot water supply set temperature−2 ° C. and T E2 = hot water supply set temperature.

【0011】このように、給湯燃焼の積算回数が基準値
1 に達することで、保温運転における保温燃焼開始温
度と保温燃焼停止温度とをTS1、TE1からTS2、TE2
その全体を低下させる(この場合は4℃)ことで、保温
されている熱交換器内の水温と外界の環境温度との差が
小さくなる結果、熱交換器内の水が温度低下するのに要
する時間がそれだけ長く(温度低下曲線の傾斜が緩く)
なり、その結果として保温燃焼の回数を減少させること
ができる。勿論、保温燃焼の回数が減少することで、熱
交換器内の水の保温状態はその分だけ悪くなるものの、
引き続き保温の機能は適当に果たすことができる。
[0011] overall this manner, by integrating the number of the hot water supply combustion reaches the reference value S 1, T S2 and the heat insulating combustion initiation temperature in maintenance operation and kept burning stop temperature from T S1, T E1, T E2 navel (In this case, 4 ° C.), the difference between the water temperature in the heat exchanger kept warm and the environmental temperature in the outside world becomes smaller, and as a result, the time required for the water in the heat exchanger to lower in temperature Is longer (the slope of the temperature drop curve is gentler)
As a result, the number of times of warm combustion can be reduced. Of course, as the number of heat-retention combustion decreases, the heat retention state of the water in the heat exchanger worsens by that much,
Subsequently, the function of keeping warm can be appropriately performed.

【0012】さらに、本実施の形態による保温運転機能
付き給湯器によれば、図2で示すように、給湯器の給湯
燃焼の積算回数が前記基準値S1 を越えて、さらに第2
の基準値S2 に達した場合には、制御部15は保温運転
機能をキャンセルさせるように構成されている。そして
この場合には、保温運転をキャンセルした旨の警告表示
を給湯器の前記制御部15或いは図示しないリモコンの
表示部に表示させるようにしている。保温運転をキャン
セルさせることで、かなり使い古した給湯器であって
も、保温運転機能の存在により寿命が早く訪れるのを多
少なりとも防止することができる。よって、保温運転機
能の存在により給湯器そのものの使用がそれ以後早期に
不能となるのを防止することができる。勿論、保温運転
機能がキャンセルせられた旨が警告として表示されるの
で、使用者はそれを知ることができ、知らなかったとい
った不都合の発生は少なくなる。
Furthermore, according to the maintenance operation function water heater according to this embodiment, as shown in Figure 2, the accumulated number of the hot-water burning water heater beyond the reference value S 1, further second
When it reaches the the reference value S 2, the control unit 15 is configured to cancel the maintenance operation function. In this case, a warning display indicating that the warming operation has been canceled is displayed on the control unit 15 of the water heater or a display unit of a remote controller (not shown). By canceling the warming operation, even if the water heater is considerably used, it is possible to prevent the service life from coming early due to the warming function. Therefore, it is possible to prevent the use of the water heater itself from being disabled early after that due to the existence of the warming operation function. Of course, the fact that the warm-keeping operation function has been canceled is displayed as a warning, so that the user can know that, and the occurrence of inconvenience, such as not knowing, is reduced.

【0013】上記において、給湯器の給湯燃焼の積算回
数の基準値S1 については、予め実験により上記の保温
燃焼の条件を変更すべき適当な積算回数を得ておき、こ
れを予め制御部15に記憶させておくことができる。ま
た上記においては、給湯器の給湯燃焼の積算回数が基準
値S1 に達すると、保温燃焼開始温度と保温燃焼停止温
度とをTS1、TE1からTS2、TE2へその両方を全体とし
て低下させるようにしているが、保温燃焼開始温度TS
のみを低く変更させるようにしてもよい。この場合もま
た、保温燃焼停止温度TE から保温燃焼開始温度TS
低下するのに要する時間は元の場合よりも長くなり、結
果として、保温燃焼の回数が減少する。
In the above, for the reference values S 1 for accumulation number of the water heater of a hot water supply combustion in advance to obtain an appropriate number of integrations to change the conditions of the heat insulating combustion by experiment, the control unit 15 this pre Can be stored. In the above, when the accumulation number of the water heater combustion water heater reaches the reference value S 1, the a heat insulating combustion start temperature and kept burning stop temperature as a whole both T S2, T E2 navel from T S1, T E1 Although the temperature is to be lowered, the warming combustion start temperature T S
Only a low value may be changed. Again, the time required to decrease from the incubated combustion stop temperature T E warmth combustion start temperature T S is longer than the original, as a result, the number of heat insulating combustion decreases.

【0014】上記においては、制御部15により、給湯
燃焼の積算回数をもって保温運転条件を変更する基準値
1 を与えたが、給湯燃焼の積算回数の代わりに、給湯
燃焼の積算時間をもって保温運転の条件を変更する基準
値S1 を与えるようにしてもよい。この場合には、勿
論、燃焼器の積算時間を積算する手段を備えた装置とす
る必要がある。そして予め実験により、上記の保温燃焼
の条件を変更すべき適当な給湯燃焼の積算時間を得て、
これを制御部15に記憶させておくことになる。同様に
保温運転条件を変更する基準値S1 は、給湯器の使用年
数で与えることができる。この場合には、勿論、給湯器
の使用の開始からの年数を数える手段を備えた装置とす
る必要がある。そして予め実験により、上記の保温燃焼
の条件を変更すべき適当な給湯器の使用年数を得て、こ
れを制御部15に記憶させておくことになる。前記使用
年数の基準値S1 は例えば10年とすることができる
が、その給湯器が使用される現場の状況に応じて、その
基準値S1 である10年を変更できるようにしてもよ
い。
[0014] In the above, the control unit 15, gave the reference values S 1 for changing the maintenance operation condition with accumulated number of the hot water supply combustion, instead of accumulation number of the water heater combustion, maintenance operation with a cumulative time of the water heater combustion reference values S 1 for changing the conditions may be given. In this case, needless to say, it is necessary to provide a device provided with means for integrating the integrated time of the combustor. Then, by an experiment in advance, an integrated time of the appropriate hot water supply combustion for changing the above-mentioned heat retaining combustion conditions is obtained,
This will be stored in the control unit 15. Reference values S 1 to change the same maintenance operation condition can be given by age water heater. In this case, of course, it is necessary to provide a device having means for counting the number of years since the start of use of the water heater. Then, an appropriate number of years of use of the water heater for which the above-mentioned condition of the warming combustion should be changed is obtained in advance by an experiment, and this is stored in the control unit 15. The reference values S 1 of age is can be, for example 10 years, depending on the situation of the site where the water heater is used, may be changed to 10 years which is the reference values S 1 .

【0015】図3のフローチャートに沿って、本発明の
より具体的な燃焼運転の制御例を説明する。今、給湯器
において保温運転スイッチがオンされることで、保温運
転が開始されると(ステップS1)、制御部15は、先
ず、給湯燃焼回数が予め設定している基準値S1 以上で
あるか否かを判定する(ステップS2)。そして基準値
1 未満の場合(ステップS2でノー)には、制御部1
5は、保温燃焼開始温度TS1=給湯設定温度+2℃と設
定し、また保温燃焼停止温度TE1=給湯設定温度+4℃
と設定する。そして、制御部15は温度センサ14から
得られた熱交換器5内の水温Tが前記保温燃焼開始温度
S1(=給湯設定温度+2℃)以下であるか否かを判定
し(ステップS3)、イエスであれば保温燃焼を開始さ
せる(ステップS4)。そして、保温燃焼を開始後にお
いて、制御部15は熱交換器5内の水温Tが前記保温燃
焼停止温度TE1(=給湯設定温度+4℃)以上になった
か否かを判定し(ステップS5)、以上となった場合
(ステップS5でイエス)には保温燃焼を停止する(ス
テップS7)。また熱交換器5内の水温Tが前記保温燃
焼停止温度TE1(=給湯設定温度+4℃)以上にならな
い場合であっても、保温燃焼開始から一定時間、例えば
4秒経過した場合(ステップS6でイエス)には、保温
燃焼を停止する(ステップS7)。保温燃焼が一定時間
以上継続して行われる場合には、熱交換器5内の水が沸
騰したりするおそれがあるから、温度センサ14の検出
温度の如何にかかわらず、燃焼を停止するようにしてい
る。前記一定時間は例えば4秒とすることができるが、
保温燃焼の燃焼能力と熱交換器5内の容量等を考慮し
て、適当な時間を予め設定する。そして保温燃焼を停止
した後は一定時間のインターバル時間をおいて、該イン
ターバル時間が経過するまでは、保温のための再燃焼が
行われないようにしている(ステップS8)。このイン
ターバル時間は、例えば60秒とするが、予め実験より
適当な時間を設定することができる。インターバル時間
が経過すれば(ステップS8でイエス)、ステップS2
に戻る。
A more specific example of control of the combustion operation of the present invention will be described with reference to the flowchart of FIG. Now, by maintenance operation switch in the water heater is turned on, when the maintenance operation is started (step S1), the control unit 15, first, the reference values S 1 or the hot water supply combustion times are preset It is determined whether or not (step S2). And if less than the reference values S 1 to the (No in step S2), the control unit 1
5 is set as the warming / combustion start temperature T S1 = hot water supply set temperature + 2 ° C., and the warm / hot combustion stop temperature T E1 = hot water supply set temperature + 4 ° C.
Set as Then, the control unit 15 determines whether or not the water temperature T in the heat exchanger 5 obtained from the temperature sensor 14 is equal to or lower than the warm-burning start temperature T S1 (= hot water supply set temperature + 2 ° C.) (step S3). If the answer is yes, the warming combustion is started (step S4). After the start of the heat-retention combustion, the control unit 15 determines whether or not the water temperature T in the heat exchanger 5 has become equal to or higher than the heat-retention combustion stop temperature T E1 (= hot water supply set temperature + 4 ° C.) (step S5). If this is the case (yes in step S5), the heat retaining combustion is stopped (step S7). Even if the water temperature T in the heat exchanger 5 does not become equal to or higher than the insulated combustion stop temperature T E1 (= hot water supply set temperature + 4 ° C.), a predetermined time, for example, 4 seconds, has elapsed from the start of insulated combustion (step S6). (Yes in step S7), the thermal combustion is stopped (step S7). If the insulated combustion is continuously performed for a certain time or more, the water in the heat exchanger 5 may be boiled. Therefore, regardless of the temperature detected by the temperature sensor 14, the combustion is stopped. ing. The fixed time can be, for example, 4 seconds,
An appropriate time is set in advance in consideration of the combustion capacity of the warm combustion, the capacity in the heat exchanger 5, and the like. Then, after stopping the heat-retaining combustion, an interval time of a predetermined time is set so that re-burning for heat retention is not performed until the interval time elapses (step S8). The interval time is, for example, 60 seconds, but an appropriate time can be set in advance by an experiment. If the interval time has elapsed (Yes in step S8), step S2
Return to

【0016】前記ステップS2において、給湯燃焼回数
が基準値S1 以上の場合には、ステップS9に進んで、
給湯燃焼回数が第2の基準値S2 以上であるか否かを判
定する(ステップS2)。そして未だ基準値S2 未満
(ステップS9でノー)の場合には、制御部15は、保
温燃焼開始温度TS2をTS2=給湯設定温度−2℃と設定
変更し、また保温燃焼停止温度TE2をTE2=給湯設定温
度と設定変更する。そして、制御部15は温度センサ1
4から得られた熱交換器5内の水温Tが前記保温燃焼開
始温度TS2(=給湯設定温度−2℃)以下であるか否か
を判定し(ステップS10)、イエスであれば保温燃焼
を開始させる(ステップS11)。そして、保温燃焼を
開始後において、制御部15は熱交換器5内の水温Tが
前記保温燃焼停止温度TE2(=給湯設定温度)以上にな
ったか否かを判定し(ステップS12)、以上となった
場合(ステップS12でイエス)には保温燃焼を停止す
る(ステップS14)。また熱交換器5内の水温Tが前
記保温燃焼停止温度TE2(=給湯設定温度)以上になら
ない場合であっても、保温燃焼開始から一定時間、例え
ば4秒経過した場合(ステップS13でイエス)には、
保温燃焼を停止する(ステップS14)。既述したよう
に保温燃焼が一定時間以上継続して行われる場合には、
熱交換器5内の水が沸騰したりするおそれがあるから、
温度センサ14の検出温度の如何にかかわらず、燃焼を
停止するようにしている。前記一定時間は例えば4秒と
することができるが、保温燃焼の燃焼能力と熱交換器5
内の容量等を考慮して、適当な時間を予め設定する。そ
して保温燃焼を停止した後は一定時間のインターバル時
間をおいて、該インターバル時間が経過するまでは、保
温のための再燃焼が行われないようにしている(ステッ
プS15)。このインターバル時間は例えば60秒とす
るが、既述したように予め実験より適当な時間を設定す
ることができる。インターバル時間が経過すれば(ステ
ップS15でイエス)、ステップS9に戻る。
[0016] In step S2, if the hot water supply combustion times of the reference values S 1 or more, the flow advances to step S9,
Hot water combustion count is equal to or second reference value S 2 or more (step S2). And in the case of yet criterion S less than 2 (No in step S9), the control unit 15, a heat insulating combustion initiation temperature T S2 set change with T S2 = hot water set temperature -2 ° C., also kept combustion stop temperature T Change E2 to T E2 = set hot water supply temperature. Then, the control unit 15 controls the temperature sensor 1
It is determined whether the water temperature T in the heat exchanger 5 obtained from Step 4 is equal to or lower than the insulated combustion start temperature T S2 (= hot water supply set temperature−2 ° C.) (Step S10). Is started (step S11). After starting the warming combustion, the control unit 15 determines whether or not the water temperature T in the heat exchanger 5 has become equal to or higher than the warming stop temperature T E2 (= hot water supply set temperature) (step S12). When the answer is YES (YES in step S12), the warm combustion is stopped (step S14). Further, even when the water temperature T in the heat exchanger 5 does not become equal to or higher than the insulated combustion stop temperature T E2 (= hot water supply set temperature), if a predetermined time, for example, 4 seconds, has elapsed from the start of insulated combustion (Yes in step S13) )
The warm combustion is stopped (step S14). As described above, if the warm combustion continues for a certain period of time or more,
Because the water in the heat exchanger 5 may boil,
The combustion is stopped regardless of the temperature detected by the temperature sensor 14. The fixed time can be set to, for example, 4 seconds.
An appropriate time is set in advance in consideration of the internal capacity and the like. Then, after stopping the heat-retaining combustion, an interval time of a predetermined time is set, and the re-burning for the heat retention is not performed until the interval time elapses (step S15). The interval time is, for example, 60 seconds, but as described above, an appropriate time can be set in advance by an experiment. If the interval time has elapsed (YES in step S15), the process returns to step S9.

【0017】前記ステップS9において、給湯燃焼回数
が第2の基準値S2 以上である(ステップS9でイエ
ス)場合には、ステップS16に進み、制御部15は保
温運転機能をキャンセルする(ステップS16)。そし
て図示しないリモコンの表示部等に保温運転機能をキャ
ンセルした旨の警告表示を行う(ステップS17)。
[0017] In the step S9, the hot water supply combustion times in the case where the second reference value S 2 or more (Yes in step S9), the process proceeds to step S16, the control unit 15 cancels the maintenance operation function (step S16 ). Then, a warning display indicating that the warming operation function has been canceled is displayed on a display unit or the like of a remote controller (not shown) (step S17).

【0018】[0018]

【発明の効果】本発明は以上の構成、作用からなり、請
求項1に記載の保温運転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保温運
転機能を備えており、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以
下になれば保温燃焼を開始し、上記熱交換器内の水温が
保温燃焼停止温度以上になれば保温燃焼を停止するよう
に制御する保温運転機能付き給湯器であって、給湯器の
使用年数が一定の基準値以上になると、前記保温燃焼開
始温度、若しくは保温燃焼開始温度と保温燃焼停止温度
の両方を、前記基準値未満の場合における温度よりも低
い温度に変更させる制御部を設けたので、給湯器の使用
年数が一定の基準値以上の多年になると、保温運転にお
ける保温燃焼の頻度をそれ以前における保温燃焼の回数
を減らすことができ、よってバーナやその周辺部品、部
材の寿命を延ばすことができ、保温運転機能付加による
給湯器の寿命の低下をある程度抑制することができる。
しかも、保温運転の機能については、基準値に至るまで
は十分なる保温機能を果たすと共に、基準値以上となっ
た場合でも、保温運転の機能は多少は低下するものの、
それなりの保温機能を引き続き保持することができる。
また請求項2に記載の保温運転機能付き給湯器によれ
ば、上記請求項1の記載における給湯器の使用年数の代
わりに、給湯器の給湯燃焼の積算回数が一定の基準値以
上になると、保温燃焼開始温度、若しくは保温燃焼開始
温度と保温燃焼停止温度の両方を、基準値未満の場合に
おける温度よりも低い温度に変更させる制御部を設けた
ので、給湯器の給湯燃焼の積算回数が一定の基準値以上
となって、実質的に多年使用になると、保温運転におけ
る保温燃焼の頻度をそれ以前における保温燃焼の回数を
減らすことができ、よって上記請求項1の構成による効
果と同様に、バーナやその周辺部品、部材の寿命を延ば
すことができ、保温運転機能付加による給湯器の寿命の
低下をある程度抑制することができる。しかも、保温運
転の機能については、基準値に至るまでは十分なる保温
機能を果たすと共に、基準値以上となった場合でも、保
温運転の機能は多少は低下するものの、それなりの保温
機能を引き続き保持することができる。また請求項3に
記載の保温運転機能付き給湯器によれば、上記請求項1
の記載における給湯器の使用年数の代わりに、給湯器の
給湯燃焼の積算時間が一定の基準値以上になると、保温
燃焼開始温度、若しくは保温燃焼開始温度と保温燃焼停
止温度の両方を、基準値未満の場合における温度よりも
低い温度に変更させる制御部を設けたので、給湯器の給
湯燃焼の積算時間が一定の基準値以上となって、実質的
に多年使用になると、保温運転における保温燃焼の頻度
をそれ以前における保温燃焼の回数を減らすことがで
き、よって上記請求項1の構成による効果と同様に、バ
ーナやその周辺部品、部材の寿命を延ばすことができ、
保温運転機能付加による給湯器の寿命の低下をある程度
抑制することができる。しかも、保温運転の機能につい
ては、基準値に至るまでは十分なる保温機能を果たすと
共に、基準値以上となった場合でも、保温運転の機能は
多少は低下するものの、それなりの保温機能を引き続き
保持することができる。また請求項4に記載の保温運転
機能付き給湯器によれば、請求項1〜3の何れかに記載
の構成による効果に加えて、基準値よりも大きい第2の
基準値を設け、該第2の基準値以上になると保温運転機
能をキャンセルして警告表示させる制御部を設けたの
で、かなり使い古した給湯器であっても、保温運転機能
の存在により寿命が早く訪れるのを抑制することがで
き、給湯器そのものの使用がそれ以後早期に不能となる
のを防止することができる。勿論、保温運転機能がキャ
ンセルせられた旨が警告として表示されるので、使用者
はそれを知ることができ、知らなかったといった不都合
の発生は少なくなる。
According to the present invention having the above-described structure and operation, according to the water heater having the heat retaining operation function according to the first aspect, the water inlet pipe, the hot water pipe, the heat exchanger and the burner mechanism are combined. Including a can body, and at least a temperature sensor for detecting a water temperature in the heat exchanger, and having a warming operation function of burning the burner mechanism to perform a warming operation even when hot water is not supplied. During the warming operation, if the water temperature in the heat exchanger detected by the temperature sensor becomes equal to or lower than the warming start temperature, the warming combustion is started, and if the water temperature in the heat exchanger becomes higher than the warming stop temperature, the warming is maintained. A water heater with a warming operation function for controlling to stop combustion, wherein when the number of years of use of the water heater exceeds a predetermined reference value, the warming combustion start temperature, or both the warming combustion starting temperature and the warming combustion stopping temperature. Is the group Since the control unit is provided to change the temperature to a lower temperature than the case where the temperature is less than the value, when the number of years of use of the water heater becomes more than a certain reference value, the frequency of the thermal combustion in the thermal insulation operation is reduced to the frequency of the thermal combustion before that. The number of times can be reduced, so that the life of the burner, its peripheral parts and members can be extended, and the reduction of the life of the water heater due to the addition of the heat retaining operation function can be suppressed to some extent.
In addition, as for the function of the heat retention operation, while performing the sufficient heat retention function up to the reference value, even when the temperature exceeds the reference value, the function of the heat retention operation is slightly reduced,
A reasonable heat retaining function can be maintained.
According to the water heater with the warming operation function described in claim 2, when the cumulative number of times of hot water supply combustion of the water heater becomes equal to or more than a certain reference value instead of the number of years of use of the water heater in claim 1, A control unit is provided to change the warm-burning start temperature, or both the warm-burning start temperature and the warm-burning stop temperature, to a temperature lower than the temperature when the temperature is less than the reference value. When the temperature is equal to or more than the reference value and the battery is substantially used for many years, the frequency of the warming combustion in the warming operation can be reduced, and the number of the warming combustions before that can be reduced. The life of the burner, its peripheral parts and members can be extended, and the life of the water heater due to the addition of the heat retaining operation function can be suppressed to some extent. In addition, as for the function of the heat retention operation, it performs a sufficient heat retention function up to the reference value, and when the temperature exceeds the reference value, the function of the heat retention operation is slightly reduced, but the heat retention function is still maintained. can do. According to the third aspect of the present invention, there is provided a water heater having a warming operation function.
Instead of the number of years of use of the water heater in the description, when the cumulative time of hot water combustion of the water heater becomes equal to or greater than a certain reference value, the warmed combustion start temperature or both the warmed combustion start temperature and the warmed combustion stop temperature are set to the reference value. Since the control unit that changes the temperature to a temperature lower than the temperature in the case of less than is provided, if the cumulative time of hot water combustion of the water heater becomes equal to or more than a certain reference value, and if the water heater is substantially used for many years, the thermal combustion in the thermal insulation operation is performed. Can reduce the number of times of warming combustion before that, so that the life of the burner, its peripheral parts, and members can be prolonged, similarly to the effect of the configuration of claim 1 above.
A reduction in the life of the water heater due to the addition of the heat retaining operation function can be suppressed to some extent. In addition, as for the function of the heat retention operation, it performs a sufficient heat retention function up to the reference value, and when the temperature exceeds the reference value, the function of the heat retention operation is slightly reduced, but the heat retention function is still maintained. can do. According to the water heater with the heat retention operation function of the fourth aspect, in addition to the effect of the configuration according to any one of the first to third aspects, a second reference value larger than the reference value is provided. Since a control unit for canceling the warming operation function and displaying a warning when the temperature exceeds the reference value of 2 is provided, even if the water heater is considerably used, it is possible to prevent the life of the water heater from being shortened due to the warming operation function. Thus, it is possible to prevent the use of the water heater itself from being disabled early thereafter. Of course, the fact that the warming operation function has been canceled is displayed as a warning, so that the user can know that, and the occurrence of inconvenience, such as not knowing, is reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の実施の形態を示す保温運転機能付き給
湯器の全体構成図である。
FIG. 1 is an overall configuration diagram of a water heater having a warming operation function according to an embodiment of the present invention.

【図2】保温運転中における、基準値の前後における保
温燃焼停止温度TE と保温燃焼開始温度Ts と熱交換器
内の温度の変化を模式的に示す図である。
[Figure 2] in the maintenance operation is a diagram schematically showing changes in the temperature of the heat insulating combustion stop temperature T E and kept burning start temperature T s and the heat exchanger before and after the reference value.

【図3】本発明による保温運転制御の実施の形態例を示
すフローチャートである。
FIG. 3 is a flowchart showing an embodiment of the warming operation control according to the present invention.

【符号の説明】[Explanation of symbols]

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 S1 基準値 S2 第2の基準値 T 熱交換器5内の水温 Ts 、TS1、TS2 保温燃焼開始温度 TE 、TE1、TE2 保温燃焼停止温度DESCRIPTION OF SYMBOLS 1 Inlet line 2 Outlet line 3 Hot water supply line 4 Can 5 Heat exchanger 6 Burner mechanism 14 Temperature sensor 15 Control part 16 Flame detector S 1 reference value S 2 2nd reference value T Inside heat exchanger 5 Water temperature T s , T S1 , T S2 Insulated combustion start temperature T E , T E1 , T E2 Insulated combustion stop temperature

───────────────────────────────────────────────────── フロントページの続き (72)発明者 福井 秀和 兵庫県神戸市中央区江戸町93番地 株式会 社ノーリツ内 Fターム(参考) 3L034 DA02  ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hidekazu Fukui 93 Edocho, Chuo-ku, Kobe-shi, Hyogo F-term in Noritz Co., Ltd. 3L034 DA02

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 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
温運転を行う保温運転機能を備えており、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
保温燃焼開始温度以下にな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以上になれば保温
燃焼を停止するように制御する保温運転機能付き給湯器
であって、給湯器の使用年数が一定の基準値以上になる
と、前記保温燃焼開始温度、若しくは保温燃焼開始温度
と保温燃焼停止温度の両方を、前記基準値未満の場合に
おける温度よりも低い温度に変更させる制御部を設けた
ことを特徴とする保温運転機能付き給湯器。
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. Even if it is not, it has a warming operation function of burning the burner mechanism and performing a warming operation, and during the warming operation, if the water temperature in the heat exchanger detected by the temperature sensor becomes lower than the warming combustion start temperature. A water heater with a warming operation function that starts warm-burning and stops the warm-burning when the water temperature in the heat exchanger becomes equal to or higher than the warm-burning stop temperature. When the temperature is equal to or more than the reference value, a control unit is provided that changes the warm-burning start temperature or both the warm-burning start temperature and the warm-burn stop temperature to a temperature lower than the temperature when the temperature is less than the reference value. Security Water heater with warm operation function.
【請求項2】 給湯器の使用年数の代わりに、給湯器の
給湯燃焼の積算回数が一定の基準値以上になると、保温
燃焼開始温度、若しくは保温燃焼開始温度と保温燃焼停
止温度の両方を、基準値未満の場合における温度よりも
低い温度に変更させる制御部を設けたことを特徴とする
請求項1に記載の保温運転機能付き給湯器。
2. When the cumulative number of times of hot water supply combustion of the water heater becomes equal to or more than a predetermined reference value instead of the number of years of use of the water heater, the warmed combustion start temperature, or both the warmed combustion start temperature and the warmed combustion stop temperature, The water heater with a warming operation function according to claim 1, further comprising a control unit that changes the temperature to a temperature lower than the temperature when the temperature is less than the reference value.
【請求項3】 給湯器の使用年数の代わりに、給湯器の
給湯燃焼の積算時間が一定の基準値以上になると、保温
燃焼開始温度、若しくは保温燃焼開始温度と保温燃焼停
止温度の両方を、基準値未満の場合における温度よりも
低い温度に変更させる制御部を設けたことを特徴とする
請求項1に記載の保温運転機能付き給湯器。
3. When the cumulative time of hot water combustion of the water heater becomes equal to or more than a certain reference value instead of the number of years of use of the water heater, the warm combustion start temperature, or both the warm combustion start temperature and the warm burn stop temperature, The water heater with a warming operation function according to claim 1, further comprising a control unit that changes the temperature to a temperature lower than the temperature when the temperature is less than the reference value.
【請求項4】 基準値よりも大きい第2の基準値を設
け、該第2の基準値以上になると保温運転機能をキャン
セルして警告表示させる制御部を設けたことを特徴とす
る請求項1〜3の何れかに記載の保温運転機能付き給湯
器。
4. A control unit for providing a second reference value larger than the reference value, and for canceling the warming operation function and displaying a warning when the second reference value is greater than or equal to the second reference value. The water heater with a warming operation function according to any one of the above-mentioned items.
JP28887498A 1998-09-25 1998-09-25 Water heater with heat retention operation function Expired - Fee Related JP3539230B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28887498A JP3539230B2 (en) 1998-09-25 1998-09-25 Water heater with heat retention operation function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28887498A JP3539230B2 (en) 1998-09-25 1998-09-25 Water heater with heat retention operation function

Publications (2)

Publication Number Publication Date
JP2000104994A true JP2000104994A (en) 2000-04-11
JP3539230B2 JP3539230B2 (en) 2004-07-07

Family

ID=17735888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28887498A Expired - Fee Related JP3539230B2 (en) 1998-09-25 1998-09-25 Water heater with heat retention operation function

Country Status (1)

Country Link
JP (1) JP3539230B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306533A2 (en) 2001-10-26 2003-05-02 Denso Corporation Catalyst for automobiles
DE10251245B4 (en) * 2001-11-05 2008-07-31 Denso Corp., Kariya Automotive catalyst
JP2012202633A (en) * 2011-03-25 2012-10-22 Osaka Gas Co Ltd Hot water feed device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1306533A2 (en) 2001-10-26 2003-05-02 Denso Corporation Catalyst for automobiles
DE10251245B4 (en) * 2001-11-05 2008-07-31 Denso Corp., Kariya Automotive catalyst
JP2012202633A (en) * 2011-03-25 2012-10-22 Osaka Gas Co Ltd Hot water feed device

Also Published As

Publication number Publication date
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