JPH0777357A - Hot water storage type electric water heater - Google Patents
Hot water storage type electric water heaterInfo
- Publication number
- JPH0777357A JPH0777357A JP22107093A JP22107093A JPH0777357A JP H0777357 A JPH0777357 A JP H0777357A JP 22107093 A JP22107093 A JP 22107093A JP 22107093 A JP22107093 A JP 22107093A JP H0777357 A JPH0777357 A JP H0777357A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- heater
- water storage
- flow rate
- storage tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
(57)【要約】
【目的】 貯湯槽上部から湯を蓄える貯湯式電気温水器
の機器の信頼性向上をはかる。
【構成】 貯湯槽１と、前記貯湯槽１の下部と上部を循
環ポンプ２、ヒータ４内蔵の加熱器３を順次接続した給
湯回路と、この給湯回路に設けた流量検知手段７の信号
でヒータ４を制御する制御部９を備え、運転開始時に、
給湯回路に水が循環したことを流量検知手段７で検知
し、その信号を制御部９に送り、ヒータ４を通電するよ
うにしたものである。従って、循環ポンプ２のモーター
焼損などで運転できない状態で機器を運転開始しても、
流量検知手段７が検知しないため、ヒータ４に通電され
ることはない。また、運転中に水が循環できなくなった
場合には、流量検知手段７が検知してヒータ４への通電
を停止する。従って、ヒータ４の表面温度が異常に上昇
し、断線することもなく信頼性の高い貯湯式電気温水器
である。
(57) [Summary] [Purpose] To improve the reliability of the equipment of the hot water storage type electric water heater that stores hot water from the upper part of the hot water storage tank. [Structure] A hot water storage tank 1, a hot water supply circuit in which a circulating pump 2 and a heater 3 having a heater 4 are sequentially connected to the lower and upper parts of the hot water storage tank 1, and a heater is provided by a signal from a flow rate detecting means 7 provided in the hot water supply circuit. 4 is provided with a control unit 9 for controlling the
The flow rate detecting means 7 detects that water circulates in the hot water supply circuit, sends the signal to the control part 9, and energizes the heater 4. Therefore, even if the equipment is started in a state where it cannot be operated due to burnout of the motor of the circulation pump 2,
Since the flow rate detecting means 7 does not detect, the heater 4 is not energized. When water cannot be circulated during operation, the flow rate detecting means 7 detects and stops energizing the heater 4. Therefore, the surface temperature of the heater 4 is not abnormally increased and the heater 4 is a reliable hot water storage type water heater without breaking.
Description
【０００１】[0001]
【産業上の利用分野】本発明はヒータを貯湯槽と分離
し、貯湯槽上部から湯を貯える貯湯式の電気温水器に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage type electric water heater in which a heater is separated from a hot water storage tank and hot water is stored from the upper part of the hot water storage tank.
【０００２】[0002]
【従来の技術】従来、この種の貯湯式電気温水器は図３
に示す如く、貯湯槽１、循環ポンプ２、ヒータ４を有し
た加熱器３、前記加熱器３の下流に設けた温度検知器
５、前記温度検知器５の信号で前記循環ポンプ２の流量
あるいは前記加熱器３のヒータ４への入力を制御する制
御部６からなる。そして、前記温度検知器５の信号で前
記循環ポンプ２あるいは前記加熱器３のヒータ４への入
力を制御し、前記加熱器３の出口で所定温度に加熱され
た湯が前記貯湯槽１の上部からしだいに蓄えられてい
く。2. Description of the Related Art Conventionally, this kind of hot water storage type electric water heater is shown in FIG.
As shown in, the hot water tank 1, the circulation pump 2, the heater 3 having the heater 4, the temperature detector 5 provided downstream of the heater 3, and the flow rate of the circulation pump 2 by the signal of the temperature detector 5 or The control unit 6 controls the input to the heater 4 of the heater 3. Then, the signal from the temperature detector 5 controls the input to the heater 4 of the circulation pump 2 or the heater 3, and the hot water heated to a predetermined temperature at the outlet of the heater 3 is stored in the upper part of the hot water tank 1. It is gradually accumulated.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような従来の構成では前記循環ポンプ２がモーター焼損
などにより運転できない状態でヒータ４に通電開始した
場合、あるいは加熱運転中に前記循環ポンプ２にゴミな
どが混入して循環不能になった場合、前記ヒータ部の表
面温度は急激に温度上昇する。そして、ヒータが断線す
ることになり、信頼性の観点から課題となる。However, in the conventional structure as described above, when the heater 4 is energized in a state where the circulation pump 2 cannot be operated due to a motor burnout or the like, or the circulation pump 2 is operated during the heating operation. When dust or the like is mixed in and it becomes impossible to circulate, the surface temperature of the heater portion rapidly rises. Then, the heater is broken, which is a problem from the viewpoint of reliability.
【０００４】さらに、前記循環ポンプ２が正常に動作す
る場合において、加熱運転開始直後には前記加熱器３お
よび給湯回路の低温水が前記貯湯槽１の上部に流入す
る。従って、前記貯湯槽１の上部に貯湯された高温水と
混合して貯湯温度を低下させることになり、貯湯温度の
安定化および省エネ化の観点からも課題となる。本発明
は上記課題を解決するものでヒータおよび機器の信頼性
向上を第１の目的とし、運転開始直後の低温水と貯湯さ
れている高温水の混合を防止して貯湯湯温の安定化およ
び省エネ化を第２の目的とするものである。Further, when the circulation pump 2 operates normally, the low-temperature water in the heater 3 and the hot water supply circuit flows into the upper part of the hot water storage tank 1 immediately after the start of the heating operation. Therefore, the hot water storage temperature is lowered by mixing with the high temperature water stored in the upper part of the hot water storage tank 1, which is a problem from the viewpoint of stabilizing the hot water storage temperature and energy saving. The present invention is intended to solve the above problems and has as its first object to improve the reliability of heaters and equipment, and to prevent mixing of low-temperature water and high-temperature water that is stored immediately after the start of operation to stabilize the hot-water storage temperature and The second purpose is to save energy.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
解決するため、 （１）貯湯槽と、前記貯湯槽の下部と上部をバイパスす
る循環ポンプ、ヒータ内蔵の加熱器を順次接続した給湯
回路と、前記給湯回路に設けた流量の有無を判定する流
量検知手段と、前記流量検知手段の信号で前記ヒータお
よび前記循環ポンプを制御する制御部を備えたものであ
る。In order to achieve the above object, the present invention provides: (1) Hot water supply in which a hot water storage tank, a circulation pump that bypasses the lower and upper parts of the hot water storage tank, and a heater with a built-in heater are sequentially connected. A circuit, a flow rate detection means provided in the hot water supply circuit for determining the presence or absence of a flow rate, and a control section for controlling the heater and the circulation pump by a signal of the flow rate detection means are provided.
【０００６】（２）貯湯槽と、前記貯湯槽の下部と上部
をバイパスする循環ポンプ、ヒータ内蔵の加熱器を順次
接続した給湯回路と、前記給湯回路に設けた流量の有無
を判定する流量検知手段と、前記加熱器の下流に設け、
前記貯湯槽をバイパスする流路に切り換える三方弁と、
前記流量検知手段の信号で前記ヒータと前記循環ポンプ
および前記三方弁の流路をヒータに通電後貯湯側に時間
遅れを有して切り換える制御をする制御部を備えたもの
である。(2) A hot water storage tank, a circulation pump that bypasses the lower and upper portions of the hot water storage tank, a hot water supply circuit in which a heater with a built-in heater is sequentially connected, and a flow rate detection for determining whether there is a flow rate provided in the hot water supply circuit Means and provided downstream of the heater,
A three-way valve that switches to a flow path that bypasses the hot water storage tank,
A control unit is provided to control switching of the flow paths of the heater, the circulation pump and the three-way valve to the hot water storage side with a time delay after energizing the heater with a signal from the flow rate detecting means.
【０００７】[0007]
【作用】本発明は上記構成によって、 （１）沸き上げ運転開始とともに前記循環ポンプが運転
し、前記貯湯槽の水が前記給湯回路を循環する。そし
て、循環することを前記流量検知手段で検知し、その信
号を前記制御部に送り、前記制御部は前記ヒータに信号
を送り、前記ヒータの通電を開始する。その際に前記循
環ポンプに異常が生じた状態で運転を開始した場合、あ
るいは運転中に前記循環ポンプに異常が生じて循環しな
くなった場合に対し、前記流量検知手段が検知し、前記
ヒータへの通電を停止するとともに前記循環ポンプへの
通電も停止する。The present invention has the above-described structure. (1) When the boiling operation is started, the circulation pump is operated, and the water in the hot water storage tank circulates in the hot water supply circuit. Then, the circulation is detected by the flow rate detecting means, a signal thereof is sent to the controller, and the controller sends a signal to the heater to start energization of the heater. At that time, when the operation is started in a state where the circulation pump has an abnormality, or when the circulation pump has an abnormality during the operation and the circulation is stopped, the flow rate detecting means detects and The current supply to the circulation pump is also stopped.
【０００８】（２）また、沸き上げ運転開始時には給湯
回路を水が循環することを前記流量検知手段が検知し
て、その信号を前記制御部に送り、前記制御部は前記三
方弁の流路を前記貯湯槽をバイパスする流路から、前記
貯湯槽上部への流路に切り換える。(2) Further, at the start of the boiling operation, the flow rate detecting means detects that water circulates in the hot water supply circuit, and sends the signal to the control section, and the control section causes the flow path of the three-way valve. Is switched from the flow path bypassing the hot water storage tank to the flow path to the upper part of the hot water storage tank.
【０００９】[0009]
【実施例】以下本発明の一実施例を図１、図２を参照し
て説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１０】１は貯湯槽、２は循環ポンプ、３は加熱器
であり、ヒータ４を内蔵している。そして、前記貯湯槽
１の下部、前記循環ポンプ２、前記加熱器３、前記貯湯
槽１の上部が順次接続されて給湯回路を構成する。５は
温度検知手段であり、前記加熱器３の下流温度を検出す
る。６はポンプ流量制御部であり、前記温度検知手段５
の信号で前記循環ポンプ２の流量を制御する。７は流量
検知手段であり、前記給湯回路に設けられている。図２
において８は三方弁であり、前記加熱器３の下流に設け
られ、前記貯湯槽１の上部への流路と前記貯湯槽１の下
部への流路切り換えをおこなう。９は制御部であり、前
記流量検知手段７の信号で前記ヒータ４、前記循環ポン
プ２および前記三方弁８の流路切り換えを制御する。１
０は給水管、１１は出湯管である。Reference numeral 1 is a hot water storage tank, 2 is a circulation pump, 3 is a heater, and a heater 4 is built therein. Then, the lower portion of the hot water storage tank 1, the circulation pump 2, the heater 3, and the upper portion of the hot water storage tank 1 are sequentially connected to form a hot water supply circuit. Reference numeral 5 is a temperature detecting means, which detects the downstream temperature of the heater 3. 6 is a pump flow rate control unit, which is the temperature detecting means 5
Signal to control the flow rate of the circulation pump 2. 7 is a flow rate detecting means, which is provided in the hot water supply circuit. Figure 2
Reference numeral 8 denotes a three-way valve, which is provided downstream of the heater 3 and switches the flow path to the upper part of the hot water storage tank 1 and the flow path to the lower part of the hot water storage tank 1. A control unit 9 controls switching of the flow paths of the heater 4, the circulation pump 2 and the three-way valve 8 by a signal from the flow rate detecting means 7. 1
Reference numeral 0 is a water supply pipe, and 11 is a hot water supply pipe.
【００１１】上記構成において、機器の運転が開始され
ると前記循環ポンプ２は作動し、前記貯湯槽１の下部か
ら前記給湯回路を通り前記貯湯槽１の上部に循環させ
る。その際、循環したことを前記流量検知手段７が検知
して前記制御部９に信号を送り、前記制御部９から前記
ヒータ４に信号が送られ、前記ヒータ４が通電を開始す
る。そして、前記加熱器３に送られた低温水は前記ヒー
タ４で加熱され、高温の湯となり前記加熱器３から流出
する。そして、その際の湯温を前記温度検知手段５で検
出し、その信号を前記ポンプ流量制御部６に送り、前記
循環ポンプ２の流量を前記加熱器３の出口湯温が一定と
なるごとく制御する。そして、所定温度の湯が前記貯湯
槽１の上部から貯湯されていく。この運転を継続しなが
ら前記貯湯槽１の上部から貯湯していく。In the above structure, when the operation of the equipment is started, the circulation pump 2 is operated to circulate the hot water from the lower part of the hot water tank 1 to the upper part of the hot water tank 1 through the hot water supply circuit. At that time, the flow rate detecting means 7 detects that the fluid is circulated, and sends a signal to the control section 9, and a signal is sent from the control section 9 to the heater 4, and the heater 4 starts energization. Then, the low-temperature water sent to the heater 3 is heated by the heater 4, becomes hot water, and flows out from the heater 3. Then, the hot water temperature at that time is detected by the temperature detecting means 5, a signal thereof is sent to the pump flow rate control unit 6, and the flow rate of the circulation pump 2 is controlled so that the outlet hot water temperature of the heater 3 becomes constant. To do. Then, hot water having a predetermined temperature is stored from above the hot water storage tank 1. Hot water is stored from the upper part of the hot water storage tank 1 while continuing this operation.
【００１２】この時、加熱運転開始直後に前記循環ポン
プ２がモーターの焼損などの異常で運転できない場合に
おいては、前記流量検知手段７が流量を検知しないた
め、前記制御部９に信号はインプットされず、前記ヒー
タ４に通電されない。また、加熱運転中に前記循環ポン
プ２がゴミなどを吸い込み運転できなくなった場合に
も、前記流量検知手段７が流量を検知しなくなるため、
前記ヒータ４への通電は停止される。従って、前記ヒー
タ４の表面温度が異常に上昇し、断線することもないた
め信頼性が向上する。At this time, when the circulation pump 2 cannot be operated immediately after the start of heating operation due to an abnormality such as burnout of the motor, the flow rate detecting means 7 does not detect the flow rate, and therefore a signal is input to the control section 9. Therefore, the heater 4 is not energized. Further, even when the circulation pump 2 sucks dust or the like during the heating operation and the operation cannot be performed, the flow rate detecting means 7 does not detect the flow rate,
Energization of the heater 4 is stopped. Therefore, the surface temperature of the heater 4 does not rise abnormally and is not broken, so that the reliability is improved.
【００１３】次に他の実施例で運転開始直後の貯湯温度
の安定化について述べる。運転開始時には前記三方弁８
の流路は貯湯槽１の下部と接続されている。この状態で
運転を開始すると前記加熱器３から流出した低温水は前
記貯湯槽１へ流入しないで再度ポンプ２へバイパスす
る。そして、給湯回路に水が循環したことを前記流量検
知手段７は検知して、その信号を前記制御部９に送り、
前記制御部９は前記ヒータ４への通電開始後配管中に残
る低温水がバイパスした後（数秒）前記三方弁８の流路
を前記貯湯槽１の上部側に切り換える。従って、給湯回
路の低温水が運転開始時に前記貯湯槽１に流入すること
がないため、前記貯湯槽１の上部に貯湯されている高温
水は安定する。Next, stabilization of the hot water storage temperature immediately after the start of operation in another embodiment will be described. At the start of operation, the three-way valve 8
Is connected to the lower part of the hot water storage tank 1. When the operation is started in this state, the low temperature water flowing out from the heater 3 is bypassed to the pump 2 again without flowing into the hot water storage tank 1. Then, the flow rate detecting means 7 detects that water circulates in the hot water supply circuit, and sends the signal to the control section 9,
The control unit 9 switches the flow path of the three-way valve 8 to the upper side of the hot water storage tank 1 after the low temperature water remaining in the pipe after the start of energization of the heater 4 is bypassed (several seconds). Therefore, since the low temperature water in the hot water supply circuit does not flow into the hot water storage tank 1 at the start of operation, the high temperature water stored in the upper portion of the hot water storage tank 1 becomes stable.
【００１４】[0014]
【発明の効果】以上実施例で説明したように本発明の電
気温水器は、貯湯槽と、前記貯湯槽の下部と上部を循環
させる循環ポンプ、ヒータ内蔵の加熱器を順次接続した
給湯回路と、前記給湯回路に設けた流量の有無を判定す
る流量検知手段と、前記流量検知手段の信号で前記ヒー
タを制御する制御部を備えることにより、 （１）沸き上げ運転開始時において、前記給湯回路に水
が循環したことを前記流量検知手段で検知し、その信号
を前記制御部に送り、前記ヒータを通電するようにした
ものである。従って、前記循環ポンプのモーター焼損な
どで運転ができない状態で機器を運転開始した場合に
は、前記流量検知手段が検知しないため、前記ヒータに
通電されることはない。また、運転中にゴミなどで前記
循環ポンプがロックして循環できなくなった場合には、
前記流量検知手段が検知して、前記制御部に信号を送
り、前記ヒータへの通電を停止するとともに前記循環ポ
ンプへの通電も停止する。従って、前記ヒータの表面温
度が異常に上昇し、断線することもなく、前記循環ポン
プもモーターロックによる過電流が発生し制御回路を損
傷することもないため信頼性が向上する。As described in the above embodiments, the electric water heater of the present invention comprises a hot water storage tank, a circulation pump for circulating the lower and upper parts of the hot water storage tank, and a hot water supply circuit in which a heater with a built-in heater is sequentially connected. By providing a flow rate detecting means provided in the hot water supply circuit for determining the presence or absence of a flow rate and a control section for controlling the heater with a signal from the flow rate detecting means, (1) the hot water supply circuit is started at the start of the boiling operation. The fact that the water is circulated is detected by the flow rate detecting means, a signal thereof is sent to the control section, and the heater is energized. Therefore, when the operation of the device is started in a state where the circulation pump cannot be operated due to motor burnout or the like, the heater is not energized because the flow rate detection unit does not detect it. Also, if the circulation pump is locked due to dust during operation and it becomes impossible to circulate,
The flow rate detecting means detects and sends a signal to the control unit to stop energization of the heater and energization of the circulation pump. Therefore, the surface temperature of the heater does not rise abnormally and is not disconnected, and the circulating pump does not cause overcurrent due to motor lock and damage the control circuit, so that the reliability is improved.
【００１５】また、前記加熱器の下流に設け、前記貯湯
槽をバイパスする流路に切り換える三方弁と、前記流量
検知手段の信号で前記ヒータと前記循環ポンプおよび前
記三方弁の流路を制御する制御部を備えることにより、 （２）沸き上げ運転開始直後は前記加熱器から流出した
低温水が前記三方弁を介して前記貯湯槽へ流入しないで
ポンプへバイパスする。そして、給湯回路に水が循環し
たことを前記流量検知手段が検知して、その信号を前記
制御部に信号を送り、前記ヒータを通電する。その後三
方弁が切り換わって貯湯槽へ湯が流入し給湯回路の低温
水が運転開始時に前記貯湯槽に流入することがないた
め、前記貯湯槽の上部に貯湯されている高温水は安定す
る。A three-way valve provided downstream of the heater for switching to a flow path bypassing the hot water storage tank, and signals of the flow rate detecting means control the flow paths of the heater, the circulation pump and the three-way valve. By providing the control unit, (2) immediately after the start of the boiling operation, the low temperature water flowing out from the heater is bypassed to the pump without flowing into the hot water storage tank through the three-way valve. Then, the flow rate detecting means detects that water circulates in the hot water supply circuit, sends the signal to the control section, and energizes the heater. Thereafter, the three-way valve is switched to prevent hot water from flowing into the hot water storage tank and the low temperature water in the hot water supply circuit from flowing into the hot water storage tank at the start of operation. Therefore, the high temperature water stored in the upper portion of the hot water storage tank is stabilized.
【図１】本発明の一実施例における電気温水器の構成図FIG. 1 is a configuration diagram of an electric water heater according to an embodiment of the present invention.
【図２】本発明の他の実施例における電気温水器の構成
図FIG. 2 is a configuration diagram of an electric water heater according to another embodiment of the present invention.
【図３】従来の電気温水器の構成図FIG. 3 is a configuration diagram of a conventional electric water heater.
１ 貯湯槽 ２ 循環ポンプ ３ 加熱器 ４ ヒータ ５ 温度検知手段 ６ ポンプ流量制御部 ７ 流量検知手段 ８ 三方弁 ９ 制御部 １０ 給水管 １１ 出湯管 1 Hot Water Tank 2 Circulation Pump 3 Heater 4 Heater 5 Temperature Detector 6 Pump Flow Rate Control 7 Flow Rate Detector 8 Three-way Valve 9 Control 10 Water Supply Pipe 11 Hot Water Pipe
Claims (2)
パスする循環ポンプ、ヒータ内蔵の加熱器を順次接続し
た給湯回路と、前記給湯回路に設けた流量の有無を判定
する流量検知手段と、前記流量検知手段の信号で前記ヒ
ータおよび前記循環ポンプを制御する制御部を設けた貯
湯式電気温水器。1. A hot water storage tank, a circulation pump that bypasses the lower and upper parts of the hot water storage tank, a hot water supply circuit in which a heater with a built-in heater is sequentially connected, and a flow rate detection means for determining the presence or absence of a flow rate provided in the hot water supply circuit. And a hot water storage type electric water heater provided with a control unit for controlling the heater and the circulation pump by a signal of the flow rate detecting means.
パスする循環ポンプ、ヒータ内蔵の加熱器を順次接続し
た給湯回路と、前記給湯回路に設けた流量の有無を判定
する流量検知手段と、前記加熱器の下流に設け、前記貯
湯槽をバイパスする流路に切り換える三方弁と、前記流
量検知手段の信号で前記ヒータと前記循環ポンプおよび
前記三方弁の流路をヒータに通電後、貯湯槽側に時間遅
れを有して切り換える制御をする制御部を設けた貯湯式
電気温水器。2. A hot water storage tank, a circulation pump that bypasses the lower and upper portions of the hot water storage tank, a hot water supply circuit in which a heater with a built-in heater is sequentially connected, and flow rate detection means for determining the presence or absence of a flow rate provided in the hot water supply circuit. And a three-way valve provided downstream of the heater to switch to a flow path that bypasses the hot water storage tank, and after energizing the heater, the circulation pump, and the flow path of the three-way valve to the heater by a signal of the flow rate detection means, A hot water storage type electric water heater provided with a control unit for controlling the hot water storage tank side with a time delay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22107093A JPH0777357A (en) | 1993-09-06 | 1993-09-06 | Hot water storage type electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22107093A JPH0777357A (en) | 1993-09-06 | 1993-09-06 | Hot water storage type electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0777357A true JPH0777357A (en) | 1995-03-20 |
Family
ID=16761023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22107093A Pending JPH0777357A (en) | 1993-09-06 | 1993-09-06 | Hot water storage type electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777357A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387002A (en) * | 2017-02-02 | 2018-08-10 | 金仁洙 | Boiler |
| CN115095985A (en) * | 2022-06-30 | 2022-09-23 | 九阳股份有限公司 | Circulating preheating method and control method for instant water dispenser |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938545A (en) * | 1982-08-30 | 1984-03-02 | Matsushita Electric Ind Co Ltd | hot water boiler |
| JPH02263040A (en) * | 1989-03-31 | 1990-10-25 | Matsushita Electric Ind Co Ltd | Electric water heater |
-
1993
- 1993-09-06 JP JP22107093A patent/JPH0777357A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5938545A (en) * | 1982-08-30 | 1984-03-02 | Matsushita Electric Ind Co Ltd | hot water boiler |
| JPH02263040A (en) * | 1989-03-31 | 1990-10-25 | Matsushita Electric Ind Co Ltd | Electric water heater |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108387002A (en) * | 2017-02-02 | 2018-08-10 | 金仁洙 | Boiler |
| KR20180090068A (en) * | 2017-02-02 | 2018-08-10 | 김인수 | Boiler |
| CN115095985A (en) * | 2022-06-30 | 2022-09-23 | 九阳股份有限公司 | Circulating preheating method and control method for instant water dispenser |
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