JP2624109B2 - Water heater - Google Patents

Water heater

Info

Publication number
JP2624109B2
JP2624109B2 JP4337832A JP33783292A JP2624109B2 JP 2624109 B2 JP2624109 B2 JP 2624109B2 JP 4337832 A JP4337832 A JP 4337832A JP 33783292 A JP33783292 A JP 33783292A JP 2624109 B2 JP2624109 B2 JP 2624109B2
Authority
JP
Japan
Prior art keywords
water
amount
heat
purge
post
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP4337832A
Other languages
Japanese (ja)
Other versions
JPH06159658A (en
Inventor
富雄 三宅
誠 濱田
晶 吉田
知 腹巻
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 JP4337832A priority Critical patent/JP2624109B2/en
Publication of JPH06159658A publication Critical patent/JPH06159658A/en
Application granted granted Critical
Publication of JP2624109B2 publication Critical patent/JP2624109B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of Combustion (AREA)
  • Feeding And Controlling Fuel (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、出湯運転停止後に燃焼
室内の残留ガスを強制排気するポストパージ機能を備え
た給湯器において、良好な出湯特性が得られる給湯器に
関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater having a post-purge function for forcibly exhausting residual gas in a combustion chamber after a stop of a hot water supply operation, and to a water heater having good hot water discharge characteristics.

【0002】[0002]

【従来の技術】従来、一般に給湯器においては、運転ス
イッチ操作或いは通水開始操作により出湯運転が開始さ
れるものであり、出湯開始時に常に設定温度に対応した
入水量が供給されるから、出湯温度が十分に上昇するま
での間、冷水が供給されることになり、定常運転に移行
して温湯が供給される迄の立ち上がり時間が長いという
問題があった。
2. Description of the Related Art Conventionally, in a water heater, generally, a tapping operation is started by an operation switch operation or a water supply start operation, and a water supply amount corresponding to a set temperature is always supplied at the start of tapping. Until the temperature rises sufficiently, the cold water is supplied, and there is a problem that the rising time until the hot water is supplied after shifting to the steady operation is long.

【0003】上記問題を解決するために、出湯開始時に
入水温度、入水量及び設定温度に対応する燃料供給量で
ある必要熱量よりも大きい初期熱量を供給することによ
って出湯特性を改善したものが提案されている。例え
ば、実開昭61−181249号公報には、熱交換器を加熱する
ガスバーナの燃焼量である熱量を調整する(例えば、ガ
スバーナの燃焼本数制御、燃料量制御等による)熱量調
整手段と、熱交換器への入水量検出器と、入水温度検出
器と、入水量と入水温度及び設定温度に基づき定常運転
時の必要熱量を設定して熱量調整手段を制御する制御器
とを備え、出湯を開始する燃焼開始時に、緩点火終了
後、上記設定した必要熱量以上の加熱量である初期熱量
に熱量調整手段を制御する(図4参照)制御手段を備え
た給湯器が記載されている。
In order to solve the above problem, it is proposed to improve the tapping characteristics by supplying an initial heat quantity larger than a required heat quantity which is a fuel supply quantity corresponding to the incoming water temperature, the incoming water quantity and the set temperature at the start of hot water supply. Have been. For example, Japanese Utility Model Laid-Open No. 61-181249 discloses a calorie adjusting means (for example, by controlling the number of gas burners to be burned, by controlling the fuel amount, etc.), An inlet water detector for the exchanger, an inlet water temperature detector, and a controller for setting a necessary amount of heat during a steady operation based on the amount of incoming water, the inlet water temperature, and the set temperature and controlling a heat amount adjusting means. A water heater provided with control means for controlling the calorific value adjusting means to the initial calorific value which is equal to or greater than the set required caloric value after the end of mild ignition at the start of combustion (see FIG. 4) is described.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、出湯を
停止してポストパージ運転を行っている最中に再出湯を
開始する場合と、ポストパージ運転終了後に再出湯を開
始する場合とでは、再出湯開始操作から燃焼用ファンの
回転数が目標回転数に到達してガスバーナに点火するま
でに要する時間が異なっている。即ち、図5に示すよう
に、ポストパージ運転中に再出湯を開始する場合は、ポ
ストパージ運転における燃焼用ファンの回転数が、点火
用燃焼用ファン回転数であるプリパージ運転における燃
焼用ファン回転数に等しいか、または概ね等しい値に設
定されているから、既に燃焼用ファンの回転数が目標回
転数に到達している状態であるから、再出湯開始操作を
行うと即時燃焼器に点火し、定常燃焼までの時間が短
く、熱交換器内の湯温が低下しない内に加熱され、速や
かに湯温(出湯温度)が上昇することになる。一方、ポ
ストパージ運転終了後に再出湯を開始する場合は、プリ
パージ運転を開始し、停止している燃焼用ファンの回転
数を高めてプリパージを行い、所定時間tP のプリパー
ジ運転終了後点火動作に移行するから、再出湯開始操作
から点火するまでに要する時間が所定のプリパージ運転
時間tP だけ長く、定常燃焼に移行するまでに要する時
間が同様に長く、熱交換器内の湯温が十分に低下した後
に加熱されるから湯温の上昇が遅いことになる。したが
って、ポストパージ運転中に再出湯を開始する場合と、
ポストパージ運転終了後に再出湯を開始する場合とにお
いて、再出湯開始時の初期熱量を等しくすると、少なく
とも一方のケースにおいて良好な再出湯特性を得ること
ができないという問題があった。
However, when the hot water is stopped and the hot water is re-started during the post-purge operation, and when the hot water is started after the post-purge operation is completed, the hot water is re-started. The time required from the start operation until the rotation speed of the combustion fan reaches the target rotation speed and ignites the gas burner is different. That is, as shown in FIG. 5, when re-starting hot water during the post-purge operation, the number of revolutions of the combustion fan in the post-purge operation is equal to the number of revolutions of the combustion fan in the pre-purge operation, which is the number of revolutions of the ignition combustion fan. Since it is set to a value equal to or approximately equal to the number, the number of revolutions of the combustion fan has already reached the target number of revolutions. The time required for steady-state combustion is short, and heating is performed before the temperature of the hot water in the heat exchanger does not decrease, so that the temperature of the hot water (hot water temperature) increases quickly. On the other hand, when starting the hot water re-discharge after the end of the post-purge operation, the pre-purge operation is started, the pre-purge is performed by increasing the rotation speed of the stopped combustion fan, and the ignition operation is performed after the end of the pre-purge operation for a predetermined time t P. Therefore, the time required from the re-starting operation to the ignition is longer by a predetermined prepurge operation time t P , the time required to shift to the steady combustion is similarly long, and the temperature of the hot water in the heat exchanger is sufficiently high. Since the water is heated after the temperature has dropped, the temperature of the hot water rises slowly. Therefore, when the hot water is re-started during the post-purge operation,
If the initial heat quantity at the start of hot water re-starting is the same as in the case where hot water re-starting is performed after the end of the post-purge operation, there has been a problem that good hot water re-starting characteristics cannot be obtained in at least one of the cases.

【0005】本発明の目的は、出湯運転停止後のポスト
パージ運転中並びにポストパージ運転終了後の再出湯運
転開始時における再出湯特性を向上させた給湯器を提供
することである。
An object of the present invention is to provide a water heater having improved hot water discharge characteristics during a post-purge operation after the stop of the hot-water discharge operation and at the start of the hot-water discharge operation after the end of the post-purge operation.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に本発明の給湯器は、熱交換器と、熱交換器を加熱する
燃焼器(例えば、ガスバーナ)と、燃焼器の熱量を調節
する熱量調節手段(例えば、比例制御弁)と、燃焼用フ
ァンと、熱交換器に接続された水路に設けられた入水量
検出手段、入水温度検出手段及び出湯温度検出手段と、
設定温度TS 、入水量Q、入水温度TC 及び出湯温度T
H に基づいて燃焼器の必要熱量GFFを算出する制御器と
を備え、プリパージ機能及びポストパージ機能を備えた
給湯器において、次の制御動作を行う制御手段を備え
る。ポストパージ運転中に再出湯する場合(ホットスタ
ート)には、点火確認後、必要熱量GFFのK1 (K1
1)倍である必要熱量GFFより大きいホットスタート初
期熱量G1 (G1 =K1 ・GFF)を所定時間t0 の間供
給した後、供給ガス量を減少させて必要熱量GFFを供給
する定常運転に移行させる。また、ポストパージ終了後
に再出湯する場合(コールドスタート)には、プリパー
ジ運転を行ってから点火し、必要熱量GFFのK2 (K2
>K1 >1)倍であるホットスタート初期熱量G1 より
大きいコールドスタート初期熱量G2 (G2=K2 ・G
FF)を所定時間t0 の間供給した後、供給ガス量を減少
させて必要熱量GFFを供給する定常運転に移行させる。
上記構成により、再出湯開始がポストパージ運転中であ
るか、ポストパージ運転終了後であるかを問わず、常に
冷水の供給を防止し、安定した出湯特性を得ることがで
きる。
In order to achieve the above object, a water heater according to the present invention regulates a heat exchanger, a combustor for heating the heat exchanger (for example, a gas burner), and a calorie of the combustor. A calorific value adjusting means (for example, a proportional control valve), a combustion fan, and a water input amount detecting means, an input water temperature detecting means and a hot water temperature detecting means provided in a water channel connected to the heat exchanger;
Set temperature T S , water input Q, water input temperature T C and tap water temperature T
A controller for calculating a required heat amount G FF of the combustor based on H , and a water heater having a pre-purge function and a post-purge function, and a control means for performing the following control operation. When hot water is to be re-discharged during the post-purge operation (hot start), after confirming the ignition, the required heat amount G FF K 1 (K 1 >
1) After supplying a hot start initial heat amount G 1 (G 1 = K 1 · G FF ) larger than the required heat amount G FF which is doubled for a predetermined time t 0 , the supply gas amount is reduced to reduce the required heat amount G FF . Shift to steady operation to supply. When the hot water is to be re-discharged after the end of the post-purge (cold start), the ignition is performed after the pre-purge operation is performed, and the required heat amount G FF of K 2 (K 2
> K 1 > 1) A cold start initial heat amount G 2 (G 2 = K 2 · G) which is larger than the hot start initial heat amount G 1 which is twice as large.
After FF ) is supplied for a predetermined time t 0 , the supply gas amount is reduced to shift to a steady operation in which the required amount of heat GFF is supplied.
With the above configuration, the supply of cold water is always prevented, regardless of whether the start of re-watering is during the post-purge operation or after the end of the post-purge operation, and stable hot-water discharge characteristics can be obtained.

【0007】[0007]

【実施例】本発明の実施例を図に基づいて説明する。図
1において、本発明を適用する給湯器1は、熱交換器2
と、熱交換器2の入口側に接続された入水路3と、熱交
換器2の出口側に接続された出湯路4と、2本のバーナ
要素51,52から成るガスバーナ5と、バーナ要素51,52
にそれぞれ接続されたガス管路61,62に設置されたガス
制御弁71,72と、両ガス管路61,62が合流接続されたガ
ス元管路6に配置された比例制御弁7及び元栓8と、上
記入水路3に配置されて入水量Qを検出する入水量セン
サ9及び入水温度TC を検出する入水温度センサ10と、
上記出湯路4に設けられて出湯温度TH を検出する出湯
温度センサ11及び通水量(本実施例では入水量Qに等し
い)を制御する水量調整弁12と、入水量センサ9及び入
水温度センサ10の熱交換器2側の入水路3と出湯温度セ
ンサ11及び水量調整弁12の熱交換器2側の出湯路4とを
連通させるバイパス路13と、燃焼用ファン14を備えてい
る。入水量センサ9で検出された入水量Qと、入水温度
センサ10で検出された入水温度TC と、出湯温度センサ
11で検出された出湯温度TH とがマイクロコンピュータ
等から成る制御器15に入力され、制御器15において、入
力された入水量Q、入水温度TC 及び予め設定した設定
温度TS に基づいてガスバーナ5の必要熱量(定常熱
量)GFFを演算するとともに、設定温度TS と出湯温度
H との偏差に基づいて補正熱量GFBを演算し、水量調
整弁12、ガス制御弁71,72、比例制御弁7及び元栓8に
駆動信号を出力する。なお、16は給湯栓である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, a water heater 1 to which the present invention is applied includes a heat exchanger 2
A water inlet 3 connected to the inlet side of the heat exchanger 2, a hot water outlet 4 connected to the outlet side of the heat exchanger 2, a gas burner 5 composed of two burner elements 51 and 52, and a burner element. 51, 52
, Gas control valves 71 and 72 installed in gas lines 61 and 62 respectively connected thereto, and a proportional control valve 7 and a main valve installed in a gas source line 6 where both gas lines 61 and 62 are connected. 8, the incoming water temperature sensor 10 for detecting the entering water quantity sensor 9 and the incoming water temperature T C detects the incoming water Q is located above entry waterway 3,
A tap water temperature sensor 11 that is provided in the tap passage 4 to detect a tap water temperature T H , a water flow regulating valve 12 that controls a flow rate (equal to a flow rate Q in the present embodiment), a flow rate sensor 9 and a flow rate sensor. A bypass path 13 for communicating the water inlet path 3 on the heat exchanger 2 side with the hot water temperature sensor 11 and the hot water path 4 on the heat exchanger 2 side of the water flow regulating valve 12 is provided with a combustion fan 14. A water inlet quantity Q detected by the incoming water sensor 9, and the incoming water temperature T C detected by the incoming water temperature sensor 10, the hot water temperature sensor
The hot water temperature T H detected at 11 is input to a controller 15 composed of a microcomputer or the like, and the controller 15 based on the input water input amount Q, the input water temperature T C, and the preset set temperature T S. The required heat amount (steady heat amount) G FF of the gas burner 5 is calculated, and the corrected heat amount G FB is calculated based on the deviation between the set temperature T S and the tapping temperature T H, and the water amount adjustment valve 12, the gas control valves 71 and 72 are calculated. , And outputs a drive signal to the proportional control valve 7 and the main stopper 8. 16 is a hot water tap.

【0008】図2及び図3を参照して動作について説明
する。給湯栓16を開いて再出湯運転開始操作を行うと、
水量調整弁12により設定された水量Qで通水が開始さ
れ、入水量センサ9で最小必要通水量(MOQ)の通水
が確認されると、制御器15において、入水量Q、入水温
度TC 及び設定温度TSに基づいてガスバーナ5の必要
熱量GFFを演算する。ポストパージ運転中において燃焼
用ファン14のポストパージ運転回転数が点火用燃焼用フ
ァン回転数(プリパージ運転回転数に等しい)に等しい
か或いは略等しくなっているから、直ちに所定量の点火
熱量GIGを供給して緩点火を行う。点火確認後、比例制
御弁7を制御してガスバーナ5への供給ガス量を急激に
増大させて必要熱量GFFのK1 (K1 >1)倍であるホ
ットスタート初期熱量G1(G1 =K1 ・GFF)を所定
時間t0 の間供給し、急速に出湯温度TH を上昇させた
後、供給ガス量を減少させて必要熱量GFFに調節して定
常運転に移行させることにより、速やかに出湯温度TH
を設定温度TS に上昇させ、ハンチングを生じない安定
した出湯温度TH を得ることができる。なお、定常運転
に移行した後は、必要熱量GFFと補正熱量GFBとう合成
演算した熱量となるように供給ガス量を制御する。
The operation will be described with reference to FIGS. When the hot water tap 16 is opened and the re-watering operation start operation is performed,
Water supply is started at the water flow rate Q set by the water flow control valve 12, and when the water flow of the minimum required water flow rate (MOQ) is confirmed by the water flow rate sensor 9, the controller 15 controls the water flow rate Q and the water flow temperature T at the controller 15. The required heat amount G FF of the gas burner 5 is calculated based on C and the set temperature T S. Since during the post purge operation post-purge working rotational speed of the combustion fan 14 is equal equal to or substantially to the ignition combustion fan speed (equal to a pre-purge operation rotational speed), immediately a predetermined amount of the ignition heat G IG To perform slow ignition. After the ignition is confirmed, the proportional control valve 7 is controlled to rapidly increase the amount of gas supplied to the gas burner 5, and the hot heat initial heat amount G 1 (G 1 ) which is K 1 (K 1 > 1) times the required heat amount G FF. = K 1 · G FF ) for a predetermined time t 0 , rapidly increasing the tapping temperature T H , then reducing the supply gas amount to adjust to the required heat amount G FF and shifting to a steady operation. The tapping temperature T H
Is raised to the set temperature T S , and a stable tapping temperature T H without hunting can be obtained. After the transition to the steady operation, the supply gas amount is controlled so that the required calorific value G FF and the corrected calorific value G FB become the combined calorific value.

【0009】ポストパージ終了後の再出湯運転開始(コ
ールドスタート)においては、プリパージ運転が開始さ
れて燃焼用ファン14が起動され、徐々に回転数が高くな
って所定のプリパージ回転数に達して所定時間(プリパ
ージ時間)tP だけプリパージ運転が行われる。点火用
回転数に等しく設定されたプリパージ回転数に達して所
定時間tP のプリパージ運転が終了すると、上記必要熱
量GFFより所定量αだけ少ない点火熱量GIG(GIG=G
FF−α)を供給して緩点火を行い、点火確認後、比例制
御弁7を制御してガスバーナ5への供給ガス量を急激に
増大させて、ホットスタート初期熱量G1 より大きく、
必要熱量GFFのK2 (K2 >K1 >1)倍であるコール
ドスタート初期熱量G2 (G2 =K2 ・GFF)を所定時
間t0 の間供給し、急速に出湯温度TH を上昇させた
後、供給ガス量を減少させて必要熱量GFFに調節して定
常運転に移行させることにより、冷水の供給時間を短く
するとともに、ハンチングを生じない安定した出湯温度
H を得ることができる。なお、これらの制御動作は制
御器15からの出力で行う。
At the start (cold start) of the hot water discharge operation after the end of the post-purge, the pre-purge operation is started and the combustion fan 14 is started, and the rotation speed gradually increases to reach the predetermined pre-purge rotation speed. The pre-purge operation is performed for a time (pre-purge time) t P. When the pre-purge operation for a predetermined time t P is completed after reaching the pre-purge rotation speed set equal to the ignition rotation speed, the ignition heat amount G IG (G IG = G) which is smaller than the required heat amount G FF by a predetermined amount α.
Perform slow ignition by supplying FF-.alpha.), after ignition confirmation, sharply increasing the amount of gas supplied to the gas burner 5 and controls the proportional control valve 7 is greater than the hot start initial heat G 1,
A cold start initial heat amount G 2 (G 2 = K 2 · G FF ), which is K 2 (K 2 > K 1 > 1) times the required heat amount G FF , is supplied for a predetermined time t 0 , and the tapping temperature T is rapidly increased. after raising the H, whereby to adjust the heat requirements G FF reduces the supplied gas amount is shifted to the normal operation, as well as shortening the cold water supply time, the tapping temperature T H of stable that no hunting Obtainable. Note that these control operations are performed with the output from the controller 15.

【0010】上述のとおり、ポストパージ終了後の再出
湯運転開始の場合には、ポストパージ運転中の再出湯運
転開始の場合に比較して、給湯器内特に熱交換器内の水
温が低下しているから、ホットスタート初期熱量G1
り大きいコールドスタート初期熱量G2 を点火確認後供
給して急速に加熱し、冷水の供給時間を短くするもので
ある。なお、上記実施例においては、熱量の調節を供給
ガス量の増減によって行っているが、バーナの燃焼本数
を増減させても良いものであり、加熱手段としてガスバ
ーナに限るものではない。
As described above, when the re-watering operation is started after the end of the post-purge operation, the water temperature in the water heater, especially in the heat exchanger is lower than when the re-watering operation is started during the post-purge operation. since it is, and rapidly heated by supplying after ignition sure hot start initial heat G 1 is greater than the cold-start initial heat G 2, it is intended to shorten the cold water supply time. In the above embodiment, the amount of heat is adjusted by increasing or decreasing the amount of supplied gas. However, the number of burners may be increased or decreased, and the heating means is not limited to a gas burner.

【0011】また、ポストパージ終了後の再出湯運転開
始(コールドスタート)において、出湯停止後またはポ
ストパージ終了後の経過時間に応じてコールドスタート
初期熱量G2 を変化させるとさらに速やかな出湯温度T
H の上昇が得られる。即ち、出湯停止後またはポストパ
ージ終了後、一定時間以内に再出湯する場合は、必要熱
量GFFのK21(K21>K1 >1)倍の第1コールドスタ
ート初期熱量G21を供給し、一定時間以上経過してから
再出湯する場合は、熱交換器等が完全に冷却しているか
ら、第1コールドスタート初期熱量G21より大きい初期
熱量である必要熱量GFFのK22(K22>K21>K1
1)倍の第2コールドスタート初期熱量G22(G22=K
22・GFF)を供給すると良いものである。
Further, at the start of the re-watering operation after the end of post-purge (cold start), if the initial calorific value G 2 of the cold start is changed according to the elapsed time after the stop of the hot-water supply or after the end of post-purge, the hot-water temperature T becomes even faster.
H rise is obtained. That is, when the hot water is to be re-watered within a predetermined time after the stop of the hot water supply or after the end of the post-purge, the first cold start initial heat amount G 21 which is K 21 (K 21 > K 1 > 1) times the required heat amount G FF is supplied. When the hot water is re-discharged after a certain period of time, since the heat exchanger and the like are completely cooled, K 22 (K) of the required heat amount G FF that is an initial heat amount larger than the first cold start initial heat amount G 21. 22 > K 21 > K 1 >
1) Double the initial calorific value of the second cold start G 22 (G 22 = K
It is good to supply 22 · G FF ).

【0012】さらに、ポストパージ終了後に再出湯運転
開始(コールドスタート)する際、出湯温度TH の降下
に応じてコールドスタート初期熱量G2 を変化させても
良いものであり、設定温度TS と出湯温度TH との温度
差(TS −TH )が所定値γ以内(TS −TH ≦γ)の
時は必要熱量GFFのK21(K21>K1 >1)倍の第1コ
ールドスタート初期熱量G21を供給し、温度差(TS
H )が所定値γを超えた(TS −TH >γ)時は、第
1コールドスタート初期熱量G21より大きい初期熱量で
ある必要熱量GFFのK22(K22>K21>K1 >1)倍の
第2コールドスタート初期熱量G22(G22=K22
FF)を供給するようにしても良い。
Furthermore, when re-tapping operation starts after post-purge completion (cold start), is intended may be changed cold start initial heat G 2 in accordance with the drop in the hot water temperature T H, and the set temperature T S When the temperature difference (T S -T H ) from the tapping temperature T H is within a predetermined value γ (T S -T H ≦ γ), the required heat quantity G FF is K 21 times (K 21 > K 1 > 1) times. providing a first cold-start initial heat G 21, the temperature difference (T S -
T H) exceeds a predetermined value γ (T S -T H> γ ) case, K 22 of heat requirements G FF is first cold-start initial heat G 21 larger initial amount of heat (K 22> K 21> K 1 > 1) times the initial calorific value of the second cold start G 22 (G 22 = K 22 ·)
G FF ).

【0013】[0013]

【発明の効果】本発明は上述のとおり構成されているか
ら、次の通りの効果を奏する。ポストパージ運転中に再
出湯する場合(ホットスタート)には、点火確認後、必
要熱量GFFのK1 (K1 >1)倍である必要熱量GFF
り大きいホットスタート初期熱量G1 を供給した後、供
給ガス量を減少させて必要熱量GFFの定常運転に移行さ
せ、一方ポストパージ終了後に再出湯する場合(コール
ドスタート)には、プリパージ運転を行ってから点火
し、必要熱量GFFのK2 (K2 >K1 )倍であるホット
スタート初期熱量G1 より大きいコールドスタート初期
熱量G2 を供給した後、供給ガス量を減少させて必要熱
量GFFの定常運転に移行させているから、再出湯開始が
ポストパージ運転中であるか、ポストパージ運転終了後
であるかを問わず、常に冷水の供給を防止し、安定した
良好な出湯特性を得ることができる。
Since the present invention is configured as described above, the following effects can be obtained. When re-tapped during the post purge operation on (hot start) after the ignition confirmation supplying K 1 (K 1> 1) times heat requirements G FF larger hot start initial heat G 1 is the quantity of heat required G FF and then, to reduce the supply amount of gas is shifted to the steady operation of the heat requirements G FF and while when re tapped after post-purge completion (cold start) ignites after performing pre-purge operation, necessary quantity of heat G FF is of K 2 (K 2> K 1 ) times after supplying hot start initial heat G 1 is greater than the cold-start initial heat G 2, and is shifted to the normal operation of the heat requirements G FF reduces the supplied gas amount Therefore, irrespective of whether the start of re-watering is during the post-purge operation or after the end of the post-purge operation, it is possible to always prevent the supply of cold water and to obtain stable and excellent hot-water supply characteristics.

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

【図1】 本発明を適用する給湯器の一例を示す概略構
成図である。
FIG. 1 is a schematic configuration diagram showing an example of a water heater to which the present invention is applied.

【図2】 本発明の再出湯時熱量変動の一例を示すタイ
ムチャートである。
FIG. 2 is a time chart showing an example of a calorific value fluctuation at the time of re-discharging of the present invention.

【図3】 本発明の制御動作を示すフローチャートであ
る。
FIG. 3 is a flowchart showing a control operation of the present invention.

【図4】 従来の再出湯時熱量変動の一例を示すタイム
チャートである。
FIG. 4 is a time chart showing an example of a conventional calorific value fluctuation at the time of re-discharge.

【図5】 再出湯時の燃焼用ファン回転数の変動を示す
タイムチャートである。
FIG. 5 is a time chart showing a change in the number of revolutions of the combustion fan at the time of hot water re-discharge.

【符号の説明】[Explanation of symbols]

1 給湯器、2 熱交換器、3 入水路、4 出湯路、
5 バーナ 6 ガス元管路、7 比例制御弁、8 元栓、9 入水
量センサ 10 入水温度センサ、11 出湯温度センサ、12 水量調
整弁 13 バイパス路、14 燃焼用ファン、15 制御器(制御
手段)、16 給湯栓
1 water heater, 2 heat exchanger, 3 water inlet, 4 outlet,
5 Burner 6 Gas main line, 7 Proportional control valve, 8 main tap, 9 Water inlet sensor 10 Water inlet temperature sensor, 11 Hot water outlet temperature sensor, 12 Water amount adjusting valve 13 Bypass passage, 14 Combustion fan, 15 Controller (control means) , 16 hot water taps

───────────────────────────────────────────────────── フロントページの続き (72)発明者 腹巻 知 兵庫県神戸市中央区明石町32番地 株式 会社ノーリツ内 (56)参考文献 実開 昭61−181249(JP,U) ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Satoshi Hatomaki 32, Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Pref.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 熱交換器と、熱交換器を加熱する燃焼器
と、燃焼器の熱量を調節する熱量調節手段と、燃焼用フ
ァンと、熱交換器に接続された水路に設けられた入水量
検出手段、入水温度検出手段及び出湯温度検出手段と、
設定温度TS、入水量Q、入水温度TC に基づいて燃焼
器の必要熱量GFFを算出する制御器と、少なくともポス
トパージ機能を備えた給湯器において、ポストパージ運
転中に再出湯する場合に、点火確認後、必要熱量GFF
1 (K1 >1)倍のホットスタート初期熱量G1 (G
1 =K1 ・GFF)を供給した後、必要熱量GFFを供給す
る定常運転に移行させ、一方、ポストパージ終了後に再
出湯する場合には、プリパージ運転を行ってから点火
し、必要熱量GFFのK2 (K2 >K1 >1)倍のコール
ドスタート初期熱量G2 (G2 =K2 ・GFF)を供給し
た後、必要熱量GFFを供給する定常運転に移行させる制
御手段を備えたことを特徴とする給湯器。
1. A heat exchanger, a combustor for heating the heat exchanger, calorie adjusting means for adjusting the calorie of the combustor, a combustion fan, and an inlet provided in a water passage connected to the heat exchanger. Water amount detecting means, incoming water temperature detecting means and hot water temperature detecting means,
In the case where the controller re-calculates the required heat amount G FF of the combustor based on the set temperature T S , the water input amount Q, and the water input temperature T C , and a water heater having at least a post-purge function, in which hot water is supplied again during the post-purge operation. After the ignition is confirmed, the initial heat amount G 1 (G 1 (G 1) of K 1 (K 1 > 1) times the required heat amount G FF
1 = K 1 · G FF ), and then shift to the steady operation of supplying the required heat amount G FF . On the other hand, when the hot water is re-discharged after the end of the post-purge, the pre-purge operation is performed and then the ignition is performed. after feeding K 2 of G FF (K 2> K 1 > 1) times the cold start initial heat G 2 (G 2 = K 2 · G FF), the control to shift to the steady operation supplying the necessary heat quantity G FF Water heater characterized by comprising means.
JP4337832A 1992-11-26 1992-11-26 Water heater Expired - Fee Related JP2624109B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4337832A JP2624109B2 (en) 1992-11-26 1992-11-26 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4337832A JP2624109B2 (en) 1992-11-26 1992-11-26 Water heater

Publications (2)

Publication Number Publication Date
JPH06159658A JPH06159658A (en) 1994-06-07
JP2624109B2 true JP2624109B2 (en) 1997-06-25

Family

ID=18312392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4337832A Expired - Fee Related JP2624109B2 (en) 1992-11-26 1992-11-26 Water heater

Country Status (1)

Country Link
JP (1) JP2624109B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016122821B3 (en) 2016-11-25 2018-02-08 Webasto SE A fuel powered vehicle heater and method of operating a fuel powered vehicle heater
CN112682946A (en) * 2020-12-28 2021-04-20 威能(无锡)供热设备有限公司 Gas water heating equipment and start control method and readable storage medium thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59231319A (en) * 1983-06-14 1984-12-26 Noritsu Co Ltd Combustion controller
JPS61181249U (en) * 1985-04-26 1986-11-12
JPH0262252U (en) * 1988-10-25 1990-05-09

Also Published As

Publication number Publication date
JPH06159658A (en) 1994-06-07

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