JPS6111552A - Hot-water reserving type electric water heater - Google Patents

Hot-water reserving type electric water heater

Info

Publication number
JPS6111552A
JPS6111552A JP59132541A JP13254184A JPS6111552A JP S6111552 A JPS6111552 A JP S6111552A JP 59132541 A JP59132541 A JP 59132541A JP 13254184 A JP13254184 A JP 13254184A JP S6111552 A JPS6111552 A JP S6111552A
Authority
JP
Japan
Prior art keywords
hot water
conduction
time
water temperature
starting
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
JP59132541A
Other languages
Japanese (ja)
Other versions
JPH0327831B2 (en
Inventor
Toshihiro Horiuchi
敏弘 堀内
Makoto Okada
誠 岡田
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59132541A priority Critical patent/JPS6111552A/en
Publication of JPS6111552A publication Critical patent/JPS6111552A/en
Publication of JPH0327831B2 publication Critical patent/JPH0327831B2/ja
Granted legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/20Arrangement or mounting of control or safety devices
    • F24H9/2007Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • F24H9/2021Storage heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/10Control of fluid heaters characterised by the purpose of the control
    • F24H15/16Reducing cost using the price of energy, e.g. choosing or switching between different energy sources
    • F24H15/164Reducing cost using the price of energy, e.g. choosing or switching between different energy sources where the price of the electric supply changes with time
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/10Control of fluid heaters characterised by the purpose of the control
    • F24H15/174Supplying heated water with desired temperature or desired range of temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/20Control of fluid heaters characterised by control inputs
    • F24H15/212Temperature of the water
    • F24H15/223Temperature of the water in the water storage tank
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/20Control of fluid heaters characterised by control inputs
    • F24H15/269Time, e.g. hour or date
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/30Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355Control of heat-generating means in heaters
    • F24H15/37Control of heat-generating means in heaters of electric heaters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/40Control of fluid heaters characterised by the type of controllers
    • F24H15/414Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00Control of fluid heaters
    • F24H15/40Control of fluid heaters characterised by the type of controllers
    • F24H15/486Control of fluid heaters characterised by the type of controllers using timers
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1919Control of temperature characterised by the use of electric means characterised by the type of controller
    • G05D23/1923Control of temperature characterised by the use of electric means characterised by the type of controller using thermal energy, the cost of which varies in function of time
    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/20Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Hardware Design (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

PURPOSE:To cope with the change of a set hot-water temperature or the delivery of hot-water quickly in case they are effected during the contracted using time of midnight electric power by a method wherein a timer device for starting the conduction of an exothermal body is provided so as to make a necessary conduction time elapse upon finishing the conduction of midnight electric power. CONSTITUTION:A shift time (Hp) for starting electric conduction is compared with a midnight timer (Hn) and a signal is outputted from a microcomputer 8 into a heater driving circuit 9 to start the conduction of a heater when the condition of Hn>=Hp is established. On the other hand, when the condition of Hn<= Hp is not established, the timer is returned to a starting point and the comparison is repeated from the decision of the midnight conduction while the shift time (Hp) for starting the conduction is renewed time by time as the count of the night timer (Hn) is progressed. The operations are repeated by the microcomputer 8 during an extremely short time and the operations are effected at all times, therefore, the changes after starting the conduction of the midnight electric power may be coped with.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、給湯機として広く家庭に用いられている深夜
電力を利用した貯湯式電気温水器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hot water storage type electric water heater that utilizes late-night electricity and is widely used in homes as a water heater.

従来例の構成とその問題点 従来の貯湯式電気温水器の動作フローチャート図を第1
図に示す。図において、ます、深夜電力が通電を開始さ
れると、それを検知して、湯温設定手段によって設定さ
れた湯温(’r8°C)、タンク下部の水温センサーに
よって検知された水温(’r w ’c )をそれぞれ
測定し、下記の式を用いて、発熱体の所要通電時間(H
8)及び、通電開始シフト時間(Hp)がしii算器に
よって演算される1、HpTTI−H 但し、V:貯湯タンク容量 (6) P:発熱・体の定格消費電力(KW) η:発熱体の加熱効率 H:深夜電力の契約使用時間 そして一方、夜間タイマー(Hn )のカウントを、タ
イマー装置により開始し、夜間タイマー(Hn ’)と
、通電開始シフト時間(Hp)を逐時、比較し、Hn≧
Hpとなった時に、発熱体への通電を開始3ヘ−ニ する、という構成である。
The configuration of the conventional example and its problems The operation flowchart of the conventional hot water storage type electric water heater is shown in Figure 1.
As shown in the figure. In the figure, when the late-night power supply starts, it is detected and the hot water temperature ('r8°C) is set by the hot water temperature setting means, and the water temperature ('r8°C) is detected by the water temperature sensor at the bottom of the tank. r w 'c) respectively, and using the following formula, calculate the required energization time of the heating element (H
8) And the energization start shift time (Hp) is calculated by the calculator 1, HpTTI-H. However, V: Hot water storage tank capacity (6) P: Heat generation/Rated power consumption of the body (KW) η: Heat generation Body heating efficiency H: Contract usage time of late-night electricity. On the other hand, the night timer (Hn) is started counting by the timer device, and the night timer (Hn') is compared with the power supply start shift time (Hp) one by one. Hn≧
The configuration is such that when the temperature reaches Hp, energization to the heating element is started for 3 hours.

しかし、このような従来例においては、深夜電力の通電
開始時刻、例えば23時になれば、発熱体への通電開始
シフト時間(Hp)を決定してしまい、以後、この更新
を行なわないため、23時以降、湯が使用されたり、ま
たは、湯温設定が変更された場合などに対応できないと
いう問題点があった。このため、例えば、23時直後に
は湯の使用がなく、貯湯タンク下部の水温(’r w 
)が70℃であったのが、その30分後に局の使用があ
り、Tw−30°Cに変化した時には、次の条件で計算
すると、下表のようになる。
However, in such a conventional example, the shift time (Hp) for starting power supply to the heating element is determined when the power supply starts at midnight, for example, at 23:00, and this update is not performed thereafter. There was a problem in that it was not possible to respond when hot water was used after that time or when the hot water temperature setting was changed. For this reason, for example, there is no hot water used immediately after 11 p.m., and the water temperature at the bottom of the hot water storage tank ('r w
) was 70°C, but when the station was used 30 minutes later and the temperature changed to Tw -30°C, calculations using the following conditions result in the following table.

H=8時間、V=3701XP=4.4KVJ。H=8 hours, V=3701XP=4.4KVJ.

η=0.9、Ts二85°C しかし、従来例では、すでに通電開始シフト時間(Hp
)を6.4時間と決定してしまっているため、発熱体の
通電は1.6時間しか行なわれず、従って設定湯温まで
到達てきないという問題が生じる3、同様の問題が、2
3時以降に設定湯温を高めに変更された場合も発生する
However, in the conventional example, the energization start shift time (Hp
) is determined to be 6.4 hours, the heating element is energized for only 1.6 hours, resulting in the problem that the water temperature does not reach the set temperature3.
This problem also occurs if the hot water temperature setting is changed to a higher value after 3 o'clock.

発明の目的 本発明は、上記従来の問題点を解消するもので、深夜電
力の契約使用時間中に、設定湯温の変更や、湯の使用が
行なわれた場合でも、迅かにこれに対応できるような制
御を行なうものである。
Purpose of the Invention The present invention solves the above-mentioned conventional problems.Even if the set hot water temperature is changed or the hot water is used during the contract usage time of late-night electricity, it is possible to quickly respond to the change. This is to control the situation so that it can be carried out.

発明の構成 上記目的を構成するための本発明の構成は、貯湯タンク
に貯える使用湯温または湯量を予め設定するための湯温
または湯量設定手段と、貯湯タンク下部の水温を検出す
る水温センサーと、前記湯温または湯量設定手段で設定
された設定値と、水温センサーで検出した水温とから、
発熱体への所要通電時間を算出する演算器と、深夜電力
通電終了時刻に、前記演算器で求めた所要通電時間が経
過するよう、前記発熱体への通電を開始するため5ペー
/ のタイマー装置とを備え、前記演算器の所要通電時間の
演算は、繰り返し、連続して行なうものである。
Structure of the Invention The structure of the present invention to achieve the above object includes a hot water temperature or hot water amount setting means for presetting the temperature or amount of hot water to be used stored in a hot water storage tank, and a water temperature sensor that detects the water temperature at the bottom of the hot water storage tank. , from the set value set by the hot water temperature or hot water amount setting means and the water temperature detected by the water temperature sensor,
A calculation unit that calculates the required energization time to the heating element, and a 5-page timer to start energization of the heating element so that the required energization time determined by the calculation unit elapses at the end of the midnight power application. The calculation of the required energization time of the calculation unit is repeatedly and continuously performed.

実施例の説明 以下、本発明の1実施例について、図面に基づいて説明
する。
DESCRIPTION OF EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

第2図は、本発明の貯湯式温水器の縦断面図であり、1
は貯湯タンク、2は貯湯タンク1の下部に設けられた発
熱体であるところのヒータ、3は同じく貯湯タンク1の
下部に設けられた水温センサーである。
FIG. 2 is a longitudinal sectional view of the hot water storage type water heater of the present invention, and 1
2 is a heater which is a heating element provided at the bottom of the hot water storage tank 1, and 3 is a water temperature sensor also provided at the bottom of the hot water storage tank 1.

第3図は、本実施例の貯湯式温水器の制御ブロック図で
、4は水温センサー3による信号を検知する水温検知回
路、5は湯温設定手段であるところの温調ポリz−ム、
6は温調ボリー−ム5の信号を検知する設定湯温検知回
路、7は深夜電力の通電・停止を検出する深夜電力検知
回路である。
FIG. 3 is a control block diagram of the hot water storage type water heater of this embodiment, in which 4 is a water temperature detection circuit that detects a signal from the water temperature sensor 3, 5 is a temperature control system which is a hot water temperature setting means,
6 is a set hot water temperature detection circuit that detects the signal from the temperature control volume 5, and 7 is a late-night power detection circuit that detects whether the late-night power is on or off.

これら信号は、演算器8b、タイマー装置8aの機能を
もったマイコン8に入力され、ヒータ駆動回路9に出力
される。
These signals are input to a microcomputer 8 having functions of an arithmetic unit 8b and a timer device 8a, and output to a heater drive circuit 9.

67、。67.

第4図は、その貯255式渇水器の動作フローチャート
図である。
FIG. 4 is an operational flowchart of the 255-type water dryer.

次に、本実施例の動作について説明する。Next, the operation of this embodiment will be explained.

まず、深夜電力の通電が開始されると、これを深夜電力
検知回路7が検知して、マイコン8に送られ、タイマー
装置8a内で夜間タイマ(Hn)のカウントが開始され
る。そして、一方水温センサー3で検知した水温(Tw
)は、水温検知回路4を介して、また、温調ボIJ x
−ム5で検知した設定湯温(T4)は、設定湯温検知回
路6を介して共にマイコン8に取り込まれ、その後、演
算器8bにて所要通電時間(H5)、通電開始シフト時
間(Hp)が演算される。こうして得られた(Hp)と
夜間タイマ(Hn)とが比較されて、Hn≧Hpの条件
が成り立てば、マイコン8からヒータ駆動回路9に信号
が出力され、ヒータ通電が開始される。
First, when the late-night power supply starts, the late-night power detection circuit 7 detects this, sends it to the microcomputer 8, and starts counting the night timer (Hn) in the timer device 8a. On the other hand, the water temperature detected by the water temperature sensor 3 (Tw
) is also connected via the water temperature detection circuit 4 to the temperature control valve IJ x
- The set water temperature (T4) detected by the system 5 is taken into the microcomputer 8 via the set water temperature detection circuit 6, and then the required energization time (H5) and the energization start shift time (Hp ) is calculated. (Hp) thus obtained is compared with the night timer (Hn), and if the condition of Hn≧Hp is satisfied, a signal is output from the microcomputer 8 to the heater drive circuit 9, and heater energization is started.

一方、Hn≧Hpの条件が成り立たなければ、再びスタ
ート点に戻って、深夜通電の判定から繰り返し行なわれ
、夜間タイマ(Hn)のカウントが進むと共に、通電開
始シフト時間(Hp)も逐時、7、−<、−B’ 更新される。また、一旦、ヒータ通電が開始されれば、
以降、HnとHp窃比較は行なわすに、ヒータ通電状態
を維持する。さらに、深夜電力通電中でない場合は、夜
間タイマ(Hn)をカウントするかわりに、(頁)クリ
アを行ない、次回の深夜電力通電開始に備える。
On the other hand, if the condition Hn≧Hp does not hold, the process returns to the starting point again and repeats the judgment of late-night energization, and as the count of the night timer (Hn) progresses, the energization start shift time (Hp) also changes from time to time. 7, -<, -B' Updated. Also, once the heater energization starts,
Thereafter, the heater is kept energized while comparing Hn and Hp. Furthermore, if the late-night power supply is not being applied, instead of counting the night timer (Hn), the page is cleared in preparation for the next late-night power supply start.

一般に、第4図における動作フローチャートが一循する
速度は、マイコン8の動作速度によるが、本実施例では
、NECのμPD7506Cを使用し、−循が約100
m5以下で終了するようにした。従って、このように極
めて短時間のうちに演算が繰り返され、しかも、常時行
なわれているこきから、貯湯タンク1下部の水1’1i
l(TW’C)や、設定湯温(T s’c )が、需要
家によって、深夜電力通電開始時刻以降に変化さぜられ
ても、ヒータ2への通電開始シフト時間(Hp)は、迅
かに変更されるため設定湯温まで到達しないというトラ
ブルか防止できる。さらに、ヒータ2への通電終了が、
深夜電力時間帯の後半になるので、放熱ロスの低減がは
かれる、といった効果がある。なお」1記実施例では湯
温設定について説明したが、湯量設定ニー”)いても同
様である。
Generally, the speed at which the operation flowchart in FIG.
Made it end in less than m5. Therefore, calculations are repeated in an extremely short period of time, and the water 1'1i in the lower part of the hot water storage tank 1 is
l (TW'C) and the set hot water temperature (T s'c ) are changed by the consumer after the late-night power supply start time, the shift time (Hp) for starting power supply to the heater 2 is as follows. Since the temperature is changed quickly, you can prevent the problem of not reaching the set water temperature. Furthermore, the end of energization to the heater 2 is
Since it is in the latter half of the late-night power period, it has the effect of reducing heat radiation loss. In addition, although the hot water temperature setting was explained in the first embodiment, the same applies even if the hot water amount setting is done.

発明の効果 以上のように、本発明によれば、次の効果を得ることが
できる。
Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1)放熱ロスの低減がはかれる。(1) Heat radiation loss can be reduced.

(2)深夜電力通電開始後でも設定湯温を変更できる。(2) The set hot water temperature can be changed even after power is turned on late at night.

(3)深夜電力通電開始後に湯の使用があっても、これ
に対応できる。
(3) Even if hot water is used after the power supply starts in the middle of the night, this can be handled.

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

第1図は、従来の貯湯式電気温水器の動作フローチャー
ト図、第2図は本発明の1実施例に掛る貯湯式電気n1
11水器の縦断面図、第3図は、同制御ブロック図、第
4図は同動作フローチャート図である。 1 ・−貯湯タンク、2・・・・・ヒータ(発熱体)、
3  水n11Iセンザー、5  温調ポリ・−ム(温
潤設定手段)、8a・  タイマー装置、8b ・演算
器。 第2図 ? 第3図 ポユl          θ。 / 衿崎Ar−一     タ 1シI暮I°−2 扱湯環        1 11m昭61−11552 (4) 第4図 /貝i遍 II 触動   1j 1  タイン−1 種延答    製置 1 ]        l
FIG. 1 is an operation flowchart of a conventional hot water storage type electric water heater, and FIG. 2 is a hot water storage type electric water heater n1 according to an embodiment of the present invention.
11 is a longitudinal sectional view of the water dispenser, FIG. 3 is a control block diagram thereof, and FIG. 4 is a flowchart of the same operation. 1.-Hot water storage tank, 2..-Heater (heating element),
3. Water n11I sensor, 5. Temperature control poly-me (temperature setting means), 8a. Timer device, 8b. Arithmetic unit. Figure 2? Figure 3 Poyu l θ. / Kazaki Ar-1 Ta1shiIgakuI°-2 Handling ring 1 11m 11552-1989 (4) Fig. 4/Shell iben II Touching 1j 1 Tine-1 Tane-1 Sekisei Preparation 1 ] l

Claims (1)

【特許請求の範囲】[Claims] 貯湯タンクに貯える使用湯温または湯量を予め設定する
ための湯温または湯量設定手段と、貯湯タンク下部の水
温を検出する水温センサーと、前記湯温または湯量設定
手段で設定された設定値と水温センサーで検出した水温
とから、発熱体への所要通電時間を算出する演算器と、
深夜電力通電終了時刻に、前記演算器で求めた所要通電
時間が経過するよう、前記発熱体への通電を開始するた
めのタイマー装置とを備え、前記演算器の所要通電時間
の演算は、繰り返し、連続して行う構成とした貯湯式電
気温水器。
A hot water temperature or hot water amount setting means for presetting the temperature or amount of hot water to be used to be stored in a hot water storage tank, a water temperature sensor that detects the water temperature at the bottom of the hot water storage tank, and a set value and water temperature set by the hot water temperature or hot water amount setting means. A calculator that calculates the required energization time to the heating element from the water temperature detected by the sensor,
and a timer device for starting energization of the heating element so that the required energization time determined by the computing unit elapses at the midnight power energization end time, and the calculation of the required energization time by the computing unit is repeated. , a hot water storage type electric water heater configured to run continuously.
JP59132541A 1984-06-27 1984-06-27 Hot-water reserving type electric water heater Granted JPS6111552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59132541A JPS6111552A (en) 1984-06-27 1984-06-27 Hot-water reserving type electric water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59132541A JPS6111552A (en) 1984-06-27 1984-06-27 Hot-water reserving type electric water heater

Publications (2)

Publication Number Publication Date
JPS6111552A true JPS6111552A (en) 1986-01-18
JPH0327831B2 JPH0327831B2 (en) 1991-04-17

Family

ID=15083689

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59132541A Granted JPS6111552A (en) 1984-06-27 1984-06-27 Hot-water reserving type electric water heater

Country Status (1)

Country Link
JP (1) JPS6111552A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6315038A (en) * 1986-07-07 1988-01-22 Toshiba Electric Appliance Co Ltd Hot water storage type electric water heater
JPS6378849U (en) * 1986-11-08 1988-05-25
JPH01208659A (en) * 1988-02-16 1989-08-22 Takara Standard Kk Boiling control device for electrical hot-water heater
JPH0320555A (en) * 1989-06-19 1991-01-29 Hitachi Ltd Control method for electric hot water heater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130948A (en) * 1982-01-29 1983-08-04 Mitsubishi Electric Corp Control device for hot-water reserving type electric water heater
JPS58130942A (en) * 1982-01-29 1983-08-04 Mitsubishi Electric Corp Control device for hot-water reserving type electric water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130948A (en) * 1982-01-29 1983-08-04 Mitsubishi Electric Corp Control device for hot-water reserving type electric water heater
JPS58130942A (en) * 1982-01-29 1983-08-04 Mitsubishi Electric Corp Control device for hot-water reserving type electric water heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6315038A (en) * 1986-07-07 1988-01-22 Toshiba Electric Appliance Co Ltd Hot water storage type electric water heater
JPH0454861B2 (en) * 1986-07-07 1992-09-01 Toshiba Kiki Kk
JPS6378849U (en) * 1986-11-08 1988-05-25
JPH01208659A (en) * 1988-02-16 1989-08-22 Takara Standard Kk Boiling control device for electrical hot-water heater
JPH0320555A (en) * 1989-06-19 1991-01-29 Hitachi Ltd Control method for electric hot water heater

Also Published As

Publication number Publication date
JPH0327831B2 (en) 1991-04-17

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