JPH06288629A - Control method for water heater - Google Patents
Control method for water heaterInfo
- Publication number
- JPH06288629A JPH06288629A JP4042095A JP4209592A JPH06288629A JP H06288629 A JPH06288629 A JP H06288629A JP 4042095 A JP4042095 A JP 4042095A JP 4209592 A JP4209592 A JP 4209592A JP H06288629 A JPH06288629 A JP H06288629A
- Authority
- JP
- Japan
- Prior art keywords
- solenoid valve
- water
- hot water
- closed
- bypass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims description 5
- 238000010926 purge Methods 0.000 claims abstract description 20
- 210000000476 body water Anatomy 0.000 claims description 23
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、瞬間式給湯器におい
て、部品の耐久性及び出湯特性を向上させた給湯器の制
御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of controlling a hot water heater in which the durability and hot water discharge characteristics of parts are improved in an instantaneous hot water heater.
【０００２】[0002]
【従来の技術】従来、瞬間式給湯器（以下、単に給湯器
という）においては、熱交換器の低温腐食を防止するた
めに、熱交換器をバイパスするバイパス路を設け、熱交
換器出口部の出湯温度を高く保つことが行われており、
このようなバイパス路を備えた給湯器で、熱交換器への
入水路に缶体入水電磁弁を設けて着火時に通水をオン、
消火時にオフさせることにより、運転最小通水量（ＭＯ
Ｑ）以下で通水された場合に熱交換器への通水を確実に
遮断する一方、バイパス路にバイパス電磁弁を設けて設
定温度に応じてバイパス通水量を調節し（設定温度が高
いときは閉、低いときは開）、給湯器からの出湯温度を
調節するとともに消火時に開放状態を保持してＭＯＱ以
下の通水時、或いは運転スイッチをオフ状態にして通水
した場合に熱交換器をバイパスさせることにより、熱交
換器のドレン発生を防止し、低温腐食の発生を防止する
ものが知られている。2. Description of the Related Art Conventionally, in a momentary water heater (hereinafter, simply referred to as a water heater), a bypass passage bypassing the heat exchanger is provided to prevent low temperature corrosion of the heat exchanger, and a heat exchanger outlet portion is provided. The hot water temperature is kept high,
In a water heater equipped with such a bypass passage, a water inlet solenoid valve for the can body is provided in the water inlet passage to the heat exchanger to turn on the water flow at ignition,
The minimum water flow rate (MO
Q) When water is passed below, the water flow to the heat exchanger is surely shut off, while a bypass solenoid valve is installed in the bypass passage to adjust the bypass water flow rate according to the set temperature (when the set temperature is high. Is closed, and when it is low, it is open.) The heat exchanger is used when the hot water from the water heater is adjusted and the open state is maintained when extinguishing to keep water below the MOQ or when water is passed by turning off the operation switch. It is known that by bypassing, the drainage of the heat exchanger is prevented and the low temperature corrosion is prevented.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来の給湯器においては、消火シーケンスの終了時に缶体
入水電磁弁は閉動作し、バイパス電磁弁は設定温度が低
い場合には所定の開度に開いたままであるが、設定温度
が高い場合には開動作するから、短いインターバルで給
湯器の使用停止を繰り返すと、その都度缶体入水電磁弁
及びバイパス電磁弁が開閉されることになり、缶体入水
電磁弁及びバイパス電磁弁の耐久性を低下させる恐れが
あるとともに、出湯特性が悪化するという問題があっ
た。However, in the above-mentioned conventional water heater, the can body water entering solenoid valve is closed at the end of the fire extinguishing sequence, and the bypass solenoid valve is opened to a predetermined opening when the set temperature is low. It remains open, but it opens when the set temperature is high.Therefore, if the water heater is repeatedly stopped at short intervals, the can water injection solenoid valve and the bypass solenoid valve will be opened and closed each time. There is a problem that the durability of the body water injection solenoid valve and the bypass solenoid valve may be reduced, and the hot water discharge characteristics are deteriorated.
【０００４】本発明の目的は、缶体入水電磁弁及びバイ
パス電磁弁の開閉頻度を減少させて耐久性を向上させる
とともに、出湯特性を向上させた給湯器の制御方法を提
供することである。An object of the present invention is to provide a method of controlling a water heater in which the frequency of opening and closing the can water injection solenoid valve and the bypass solenoid valve is reduced to improve durability and the hot water discharge characteristics are improved.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に本発明の給湯器の制御方法は、熱交換器と、熱交換器
をバイパスするバイパス路とを備え、熱交換器への入水
路に設けられた缶体入水電磁弁とバイパス路に設けられ
たバイパス電磁弁とを備えて成る給湯器において、出湯
停止時、即ち消火時にポストパージ時間と同等の遅延時
間をもって缶体入水電磁弁及びバイパス電磁弁を初期状
態（例えば、入水電磁弁は閉、バイパス電磁弁は開）に
復帰させるものであり、両電磁弁が頻繁に開閉動作する
ことがなく、再出湯時の出湯特性を改善することができ
るとともに、両電磁弁の耐久性を向上させることができ
る。In order to achieve the above object, a method of controlling a water heater according to the present invention comprises a heat exchanger and a bypass passage bypassing the heat exchanger, and an inlet passage to the heat exchanger. In a water heater comprising a can body water injection solenoid valve provided in and a bypass solenoid valve provided in a bypass passage, a can body body water supply solenoid valve and a can body water supply solenoid valve with a delay time equivalent to the post-purge time when hot water is stopped, that is, when fire is extinguished, The bypass solenoid valve is returned to the initial state (for example, the water inlet solenoid valve is closed, the bypass solenoid valve is open), and both solenoid valves do not frequently open and close, improving the tapping characteristics when tapping again. In addition, the durability of both solenoid valves can be improved.
【０００６】[0006]
【実施例】本発明の実施例を図に基づいて説明すると、
図１において、熱交換器１の入口側に入水路２が、出口
側に出湯路３が接続され、熱交換器１をバイパスして入
水路２と出湯路３とを連通させるバイパス路４が設けら
れ、入水路２のバイパス路４分岐部と熱交換器１との間
に設けられた缶体入水電磁弁５と、バイパス路４にバイ
パス電磁弁６と、バイパス路４の合流部よりも下流側の
出湯路３に設けられた水量サーボ弁７と、入水路２のバ
イパス路４分岐部よりも上流側に設けられた全通水量Ｑ
T を検出する水量センサ８及び入水温度ＴC を検出する
入水温度センサ９と、入水路２のバイパス路４分岐部と
熱交換器１との間に設けられた熱交換器通水量ＱH を検
出する水量センサ１０と、バイパス路４の合流部よりも
下流側の出湯路３に設けられ、熱交換器１からの高温湯
とバイパス路４からの冷水とが混合された後の出湯温度
ＴO を検出する出湯温度センサ１１とを備えており、上
記全通水量ＱT 、入水温度ＴC 、熱交換器通水量ＱH 、
出湯温度ＴO の各検出信号が入力され、設定温度ＴS に
基づいて缶体入水電磁弁５、バイパス電磁弁６、水量サ
ーボ弁７に制御信号を出力するコントローラ１２が設け
られている。なお、１３はバーナである。Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, a water inlet passage 2 is connected to the inlet side of the heat exchanger 1, and a hot water outlet passage 3 is connected to the outlet side thereof, and a bypass passage 4 that bypasses the heat exchanger 1 and connects the water inlet passage 2 with the hot water outlet passage 3 is formed. The can body water injection solenoid valve 5 provided between the branch portion of the bypass passage 4 of the water inlet passage 2 and the heat exchanger 1, the bypass solenoid valve 6 in the bypass passage 4, and the confluence portion of the bypass passage 4 The water amount servo valve 7 provided in the downstream hot water outlet passage 3 and the total water flow amount Q provided upstream of the branch portion of the bypass passage 4 of the water inlet passage 2.
The water amount sensor 8 for detecting T and the water temperature sensor 9 for detecting the water temperature T C , and the heat exchanger water flow amount Q H provided between the bypass passage 4 branch portion of the water inlet 2 and the heat exchanger 1 The outlet water temperature T after the water amount sensor 10 for detection and the outlet passage 3 provided downstream of the joining portion of the bypass passage 4 is mixed with the hot water from the heat exchanger 1 and the cold water from the bypass passage 4. A hot water outlet temperature sensor 11 for detecting O is provided, and the total water flow rate Q T , the incoming water temperature T C , the heat exchanger water flow rate Q H ,
A controller 12 is provided which receives each detection signal of the tapping temperature T O and outputs a control signal to the can body water entry solenoid valve 5, the bypass solenoid valve 6, and the water amount servo valve 7 based on the set temperature T S. In addition, 13 is a burner.
【０００７】図２のタイムチャートを参照して上記給湯
器の制御動作を説明すると、使用開始前の初期状態にお
いては、缶体入水電磁弁５は閉状態、バイパス電磁弁６
は開状態にあり、出湯路３に接続された給湯栓（図示せ
ず）を開いて出湯を開始すると、水量センサ８が検出す
る全通水量ＱT がＭＯＱ（例えば、3.5 l/min.）を超え
た時点で缶体入水電磁弁５が開き、水量センサ１０が検
出する熱交換器通水量ＱH がＭＯＱを超えると、バーナ
１３の着火動作が開始され、燃焼用ファン（図示せず）
の運転（プリパージ運転）が開始され、所定のプリパー
ジ時間ＴPR（例えば、1.5 秒間）経過後に、ガス弁が開
き、イグナイタが作動してバーナ１３が着火され、燃焼
が開始される。この時バイパス電磁弁６は、設定温度Ｔ
S が所定値（例えば、50℃）以上の高温出湯時には閉じ
られ、設定温度ＴS が所定値（50℃）未満の低温出湯時
には開かれる。The control operation of the water heater will be described with reference to the time chart of FIG. 2. In the initial state before the start of use, the can body water entry solenoid valve 5 is closed and the bypass solenoid valve 6 is used.
Is in the open state, and when the hot water tap (not shown) connected to the hot water outlet 3 is opened to start hot water, the total water flow rate Q T detected by the water quantity sensor 8 is MOQ (for example, 3.5 l / min.). When the can body water entry solenoid valve 5 opens and the heat exchanger water flow rate Q H detected by the water amount sensor 10 exceeds MOQ, the ignition operation of the burner 13 is started, and a combustion fan (not shown)
(Pre-purge operation) is started, and after a predetermined pre-purge time T PR (for example, 1.5 seconds) has elapsed, the gas valve opens, the igniter operates, the burner 13 is ignited, and combustion is started. At this time, the bypass solenoid valve 6 is set to the set temperature T
It is closed when hot water is discharged when S is equal to or higher than a predetermined value (for example, 50 ° C.), and is opened when low temperature hot water is discharged when the set temperature T S is lower than the predetermined value (50 ° C.).
【０００８】出湯停止時に給湯栓を閉じると、全通水量
ＱT がＭＯＱ未満に低下した時点から、ガス弁が閉じら
れ、燃焼用ファンがポストパージ運転を開始し、所定の
ポストパージ時間ＴPO（例えば、３分間）経過後に缶体
入水電磁弁５を閉、バイパス電磁弁６を開として初期状
態に復帰させる。When the hot water tap is closed when hot water is stopped, the gas valve is closed and the combustion fan starts the post-purge operation from the time when the total water flow rate Q T falls below MOQ, and the predetermined post-purge time T PO After (for example, 3 minutes) has elapsed, the can body water entry solenoid valve 5 is closed and the bypass solenoid valve 6 is opened to restore the initial state.
【０００９】ポストパージ運転中に再出湯が開始される
と、上記プリパージ時間ＴPR（1.5秒間）に相当する時
間だけポストパージ運転が行われたことを確認し、プリ
パージ運転を省略して即時に着火動作に移行する。When the re-pour hot water is started during the post-purge operation, it is confirmed that the post-purge operation has been performed for a time corresponding to the pre-purge time T PR (1.5 seconds), and the pre-purge operation is omitted immediately. Transition to ignition operation.
【００１０】なお、図２のタイムチャートにおいて、Ｗ
ＶＨは缶体入水電磁弁５、ＷＶＢはバイパス電磁弁６、
ＩＧはイグナイタ、ＳＶ1 ，ＳＶ2 はガス弁、ＦＲはフ
レームロッドである。In the time chart of FIG. 2, W
VH is a can body water injection solenoid valve 5, WVB is a bypass solenoid valve 6,
IG is an igniter, SV 1 and SV 2 are gas valves, and FR is a frame rod.
【００１１】図３のフローチャートを参照して缶体入水
電磁弁（ＷＶＨ）５の制御動作を詳述すると、初期状態
において缶体入水電磁弁５は閉じられており、給湯栓を
開けて給湯を開始すると、全通水量ＱT がＭＯＱ（3.5
l/min.）以上になった（ＭＯＱ ＯＮ）ことを確認して
缶体入水電磁弁５を開放し、全通水量ＱT がＭＯＱ（3.
5 l/min.）以上である限り缶体入水電磁弁５を開放し続
ける。一方全通水量ＱT がＭＯＱ（3.5 l/min.）未満で
ある場合には缶体入水電磁弁５は閉じられた初期状態が
継続される。The control operation of the can body water entry solenoid valve (WVH) 5 will be described in detail with reference to the flow chart of FIG. 3. In the initial state, the body body water entry solenoid valve 5 is closed, and the hot water supply tap is opened to supply hot water. Once started, the total water flow Q T will change to MOQ (3.5
l / min.) or more (MOQ ON), open the can body water inlet solenoid valve 5, and the total water flow Q T is MOQ (3.
As long as it is 5 l / min.) Or more, keep the can body water entry solenoid valve 5 open. On the other hand, when the total water flow rate Q T is less than MOQ (3.5 l / min.), The can body water inlet solenoid valve 5 is kept in the closed initial state.
【００１２】缶体入水電磁弁５が開放された後に、全通
水量ＱT がＭＯＱ（3.5 l/min.）未満となると、全通水
量ＱT が所定の下限値（例えば、3.0 l/min.）以上であ
る場合には缶体入水電磁弁５を開放し続けるものであ
り、逆に全通水量ＱT が下限値（3.0 l/min.）未満（Ｍ
ＯＱ ＯＦＦ）となり、その状態が所定時間即ちポスト
パージ時間ＴPO（３分間）継続した場合には給湯が停止
されるものとして缶体入水電磁弁５が閉じられて初期状
態に復帰する一方、ポストパージ時間ＴPO（３分間）継
続せずに全通水量ＱT が下限値（3.0 l/min.）以上にな
ると缶体入水電磁弁５の開放が保持されて出湯が継続さ
れる。なお、全通水量ＱT の下限値（3.0 l/min.）は、
出湯運転を継続するのに必要な最小限流量である。[0012] After the can body water inlet solenoid valve 5 is opened, the Zentsu water Q T is MOQ (3.5 l / min.), Less Zentsu water Q T is a predetermined lower limit value (for example, 3.0 l / min .) Or more, the can body water inlet solenoid valve 5 is continuously opened, and conversely, the total water flow rate Q T is less than the lower limit value (3.0 l / min.) (M
OQ OFF), and if that state continues for a predetermined time, that is, the post-purge time T PO (3 minutes), it is assumed that the hot water supply is stopped and the can body water injection solenoid valve 5 is closed to return to the initial state, while When the total water flow rate Q T reaches the lower limit value (3.0 l / min.) Or more without continuing the purging time T PO (3 minutes), the can body water inlet solenoid valve 5 is kept open and hot water discharge is continued. The lower limit of the total water flow rate Q T (3.0 l / min.) Is
This is the minimum flow rate required to continue the hot water discharge operation.
【００１３】給湯を停止した後に、ポストパージ時間Ｔ
PO（３分間）未満である短いインターバルで再出湯を行
う場合には、全通水量ＱT が下限値（3.0 l/min.）未満
となった状態がポストパージ時間ＴPO（３分間）だけ継
続せず、缶体入水電磁弁５を開放し続ける。After the hot water supply is stopped, the post purge time T
When re-extracting hot water at a short interval of less than PO (3 minutes), the total flow rate Q T is below the lower limit (3.0 l / min.) Only for the post-purge time T PO (3 minutes). Without continuing, the can body water entry solenoid valve 5 is kept open.
【００１４】次に図４のフローチャートを参照してバイ
パス電磁弁（ＷＶＢ）６の制御動作を詳述すると、初期
状態においてバイパス電磁弁６は開放されており、給湯
を開始すると、設定温度ＴS が所定値（例えば、50℃）
未満である場合にはバイパス電磁弁６は開放された初期
状態が継続される。Next, the control operation of the bypass solenoid valve (WVB) 6 will be described in detail with reference to the flowchart of FIG. 4. The bypass solenoid valve 6 is opened in the initial state, and when hot water supply is started, the set temperature T S is set. Is a predetermined value (for example, 50 ° C)
When it is less than the above, the bypass solenoid valve 6 is maintained in the opened initial state.
【００１５】また、設定温度ＴS が所定値（50℃）以上
である場合には、給湯を開始して全通水量ＱT がＭＯＱ
（3.5 l/min.）以上になったことを確認し、さらに全通
水量ＱT が下限値（3.0 l/min.）以上であることを確認
するとバイパス電磁弁６を閉じるものである。一方全通
水量ＱT が下限値（3.0 l/min.）未満の状態がポストパ
ージ時間ＴPO（３分間）継続した場合には給湯が停止さ
れるものとして、バイパス電磁弁６が開放され、初期状
態に復帰する。When the set temperature T S is equal to or higher than a predetermined value (50 ° C.), hot water supply is started and the total water flow rate Q T is MOQ.
When it is confirmed that the flow rate is more than (3.5 l / min.) And the total water flow rate Q T is more than the lower limit value (3.0 l / min.), The bypass solenoid valve 6 is closed. On the other hand, when the total water flow rate Q T is less than the lower limit value (3.0 l / min.) For the post-purge time T PO (3 minutes), the hot water supply is stopped and the bypass solenoid valve 6 is opened. Return to the initial state.
【００１６】バイパス電磁弁６を閉じた状態のもとでの
給湯（設定温度ＴS ≧50℃）を停止した後に、ポストパ
ージ時間ＴPO（３分間）未満である短いインターバルで
再出湯を行う場合には、全通水量ＱT が下限値（3.0 l/
min.）未満となった状態がポストパージ時間ＴPO（３分
間）だけ継続せず、バイパス電磁弁６を閉じた状態で再
出湯（設定温度ＴS ≧50℃）を行う。After stopping the hot water supply (set temperature T S ≧ 50 ° C.) under the condition that the bypass solenoid valve 6 is closed, the hot water is again discharged at a short interval which is less than the post-purge time T PO (3 minutes). In this case, the total water flow Q T is the lower limit (3.0 l /
The state in which the temperature is less than min.) does not continue for the post-purge time T PO (3 minutes), and hot water is reflowed (set temperature T S ≧ 50 ° C.) with the bypass solenoid valve 6 closed.
【００１７】[0017]
【発明の効果】本発明は、上述のとおり構成されている
から、出湯停止時には所定量以上の通水量の低下がポス
トパージ時間以上継続する時に缶体入水電磁弁及びバイ
パス電磁弁を開閉動作させるものであり、両電磁弁が頻
繁に開閉動作することがなく、再出湯時の出湯特性を改
善することができるとともに、両電磁弁の耐久性を向上
させることができる。Since the present invention is configured as described above, when the discharge of water is stopped and the amount of water flow is reduced by a predetermined amount or more and continues for the post-purge time or longer, the can body water inlet solenoid valve and the bypass solenoid valve are opened and closed. Since both solenoid valves do not frequently open and close, the hot water discharge characteristic at the time of re-hot water discharge can be improved, and the durability of both solenoid valves can be improved.
【図１】 本発明を適用する給湯器の概略構成図であ
る。FIG. 1 is a schematic configuration diagram of a water heater to which the present invention is applied.
【図２】 本発明の制御動作を示すタイムチャートであ
る。FIG. 2 is a time chart showing a control operation of the present invention.
【図３】 水電磁弁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 a water solenoid valve.
【図４】 バイパス電磁弁の制御動作を示すフローチャ
ートである。FIG. 4 is a flowchart showing a control operation of a bypass solenoid valve.
１ 熱交換器 ２ 入水路 ３ 出湯路 ４ バイパス路 ５ 缶体入水電磁弁 ６ バイパス電磁弁 ７ 水量サーボ弁 ８ 水量センサ ９ 入水温度センサ １０ 水量センサ １１ 出湯温度センサ １２ コントローラ １３ バーナ 1 Heat Exchanger 2 Inlet Channel 3 Outlet Channel 4 Bypass Channel 5 Can Water Inlet Solenoid Valve 6 Bypass Solenoid Valve 7 Water Volume Servo Valve 8 Water Volume Sensor 9 Inlet Water Temperature Sensor 10 Water Volume Sensor 11 Outlet Temperature Sensor 12 Controller 13 Burner
───────────────────────────────────────────────────── 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 (72)発明者 抱 貴雄 兵庫県神戸市中央区明石町32番地 株式会 社ノーリツ内 (72)発明者 福井 秀和 兵庫県神戸市中央区明石町32番地 株式会 社ノーリツ内 (72)発明者 森下 敦弘 兵庫県神戸市中央区明石町32番地 株式会 社ノーリツ内 (72)発明者 川口 裕 兵庫県神戸市中央区明石町32番地 株式会 社ノーリツ内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Umaki 32 No. Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Within Noritsu Co., Ltd. (72) Inventor Hidekazu Fukui 32 No. Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture Stock company Noritsu (72) Inventor Atsuhiro Morishita 32 Akashi-cho, Chuo-ku, Kobe City Hyogo (72) Inventor Yutaka Kawaguchi 32 No. Akashi-cho, Chuo-ku, Kobe-shi, Hyogo Prefecture
Claims (1)
イパス路と、熱交換器への入水路に設けられた缶体入水
電磁弁とバイパス路に設けられたバイパス電磁弁とを備
えて成る給湯器において、出湯停止時にポストパージ時
間と同等の遅延時間をもって缶体入水電磁弁及びバイパ
ス電磁弁を初期状態に復帰させることを特徴とする給湯
器の制御方法。1. A heat exchanger, a bypass path for bypassing the heat exchanger, a can body water entry solenoid valve provided in a water entry path to the heat exchanger, and a bypass solenoid valve provided in the bypass path. In the hot water supply apparatus, the method for controlling the hot water supply apparatus is characterized in that when the hot water supply is stopped, the can water injection solenoid valve and the bypass solenoid valve are returned to the initial state with a delay time equivalent to the post purge time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4042095A JP2526461B2 (en) | 1992-01-31 | 1992-01-31 | How to control the water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4042095A JP2526461B2 (en) | 1992-01-31 | 1992-01-31 | How to control the water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06288629A true JPH06288629A (en) | 1994-10-18 |
| JP2526461B2 JP2526461B2 (en) | 1996-08-21 |
Family
ID=12626445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4042095A Expired - Fee Related JP2526461B2 (en) | 1992-01-31 | 1992-01-31 | How to control the water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2526461B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6053739A (en) * | 1983-09-05 | 1985-03-27 | Matsushita Electric Ind Co Ltd | Hot-water supplier |
| JP3080251U (en) * | 2001-03-13 | 2001-09-21 | 中央容器株式会社 | Integrated barrel bottom |
-
1992
- 1992-01-31 JP JP4042095A patent/JP2526461B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6053739A (en) * | 1983-09-05 | 1985-03-27 | Matsushita Electric Ind Co Ltd | Hot-water supplier |
| JP3080251U (en) * | 2001-03-13 | 2001-09-21 | 中央容器株式会社 | Integrated barrel bottom |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2526461B2 (en) | 1996-08-21 |
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