JPS5963442A - Tap-controlled hot-water supplier - Google Patents
Tap-controlled hot-water supplierInfo
- Publication number
- JPS5963442A JPS5963442A JP57173420A JP17342082A JPS5963442A JP S5963442 A JPS5963442 A JP S5963442A JP 57173420 A JP57173420 A JP 57173420A JP 17342082 A JP17342082 A JP 17342082A JP S5963442 A JPS5963442 A JP S5963442A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- hot
- water
- temperature
- water temperature
- 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 99
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/10—Control of fluid heaters characterised by the purpose of the control
- F24H15/174—Supplying heated water with desired temperature or desired range of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
- F24H15/219—Temperature of the water after heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/281—Input from user
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/305—Control of valves
- F24H15/31—Control of valves of valves having only one inlet port and one outlet port, e.g. flow rate regulating valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
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)
- Fluid Mechanics (AREA)
- Computer Hardware Design (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、瞬間式給湯装置の給湯温度制御構成に関する
。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a hot water temperature control arrangement for an instant hot water heater.
従来例の構成とその問題点
従来、ガス比例制御弁を搭載した瞬間給湯機は第1図に
示すようなシステム構成をとっている。Conventional configuration and its problems Conventionally, an instantaneous water heater equipped with a gas proportional control valve has a system configuration as shown in FIG.
第1図において、1は給湯機本体であり、バーナ4と熱
交換部3を含む、給湯機の出11令J近2にはザーミス
タなど湯温検知器6が配置されている。In FIG. 1, reference numeral 1 denotes a water heater main body, and a hot water temperature detector 6 such as a thermistor is disposed near the outlet 11 of the water heater 2, which includes a burner 4 and a heat exchange section 3.
5はガス比例制御弁であり、ガス配管12につながる。5 is a gas proportional control valve, which is connected to the gas pipe 12.
7は温度制御回路、8は湯温設定部である。7 is a temperature control circuit, and 8 is a hot water temperature setting section.
9および1oは水栓である。9 and 1o are water faucets.
以にのような構成において、湯温設定部8て湯温を設定
すると、温度制御回路7は出[−12の湯温か、設定値
になるようにガス比例制御弁5によって燃焼用を制御す
るので、給湯機の出湯温度は、常に設定値に保たれるが
、使用−1一つぎのような問題を有j〜ている。In the above configuration, when the hot water temperature is set by the hot water temperature setting section 8, the temperature control circuit 7 controls the combustion by the gas proportional control valve 5 so that the hot water temperature reaches the set value of -12. Therefore, the hot water temperature of the hot water heater is always kept at the set value, but there are problems when using it, such as the following.
(92個以上の水栓がある場合において、各〕Z) の水栓からの出湯温度は、給湯機の出湯温度て決捷る。(If there are 92 or more faucets, each] Z) The temperature of the hot water that comes out of the faucet depends on the temperature of the hot water that comes out of the water heater.
しだかっ、て、水栓毎に異なっ/こ湯温てQま使用でき
ない。Unfortunately, the water temperature is different for each faucet and I can't use it.
■ 湯温設定部上、実際に湯を使用する場!ガ、すなわ
ち水栓の位置とが離れているので不便である。■ Above the hot water temperature setting section, where you actually use the hot water! This is inconvenient because it is far away from the water faucet.
発明の目的
本発明は、このような従来の問題点を解消するもので、
■使用する水栓を直接操作することによって湯温か設定
でき、■他の水栓における設定湯温の影響を受けること
なく、かつ■エネルギー損失を最小限にする給湯システ
ムを実現することを目的吉する。Purpose of the Invention The present invention solves these conventional problems.
Our goal is to create a hot water supply system that allows you to set the hot water temperature by directly operating the faucet in use, is unaffected by the hot water temperature settings of other faucets, and minimizes energy loss. do.
発明の構成
ト記目的を達成するために、本発明は設定しだ湯温値を
外部に出力しうる複数個の混合水栓と、ガス比例制御弁
封の瞬間給湯機とによって構成し、1、記各混合水栓で
設定しだ湯温の配管ロスを考慮した近似値がト記断間給
湯機の出湯温度になるようVこ燃焼用゛を制御する。Structure of the Invention: To achieve the object, the present invention comprises a plurality of mixing faucets capable of outputting a set hot water temperature value to the outside, and an instantaneous water heater with a gas proportional control valve. , The combustion valve is controlled so that the approximate value of the hot water temperature set at each mixing faucet, taking into account piping loss, becomes the hot water outlet temperature of the hot water heater during the interval.
実施例の説明 以下本発明の一実施例について図面に基づき説明する。Description of examples An embodiment of the present invention will be described below based on the drawings.
第2図において、13および14は設定値が外部に出力
できる湯温設定部を備え、かつ出湯温度が前記設定値に
なるように瞬間給湯機1から供給される湯と、水管25
から供給される水を自動的に混合する機能を備えだ混合
水栓である。In FIG. 2, reference numerals 13 and 14 are provided with hot water temperature setting units capable of outputting a set value to the outside, and the hot water supplied from the instant hot water heater 1 and the water pipe 25 are provided so that the hot water temperature reaches the set value.
This is a mixer faucet that has the function of automatically mixing the water supplied from the source.
7aは瞬間給湯機1の湯温制御回路であり、第1図の湯
温設定部8による湯温設定信号の代りに各混合水栓13
および14の湯温設定信号T1.T2゜外気温度T3お
よび補正値Toが、設定値として入力されている。7a is a hot water temperature control circuit of the instantaneous hot water heater 1, which sends a hot water temperature setting signal to each mixing faucet 13 instead of the hot water temperature setting signal from the hot water temperature setting section 8 in FIG.
and 14 hot water temperature setting signal T1. T2° outside air temperature T3 and correction value To are input as set values.
なお、第1図と同一の構成要素には同一の番号を付して
いる。Note that the same components as in FIG. 1 are given the same numbers.
上記構成において、温度制御回路7aは上記湯温設定信
号T1.T2を比較して、T1≧T2ならばT1 を
、まだT1くT2ならばT2を基準にT3および配管長
さを考慮して設定される補正値Toを加えて湯温設定値
として選択する。一方、瞬間給湯機1の出湯温度は、出
口付近2に配置されだ湯温検知器6によって検知され実
際の湯温信号が、被制御信号Tcとして、温度制御回路
7dに入力されている。温度制御回路7aは、上記基準
湯温設定値と、披制ill信j’;Tcと比較しつつ、
両者がワしくなるようにガス比例制阿弁を制御すること
によって、ガス流量を制御し、その結果、バーナ4の燃
焼用を制御する。In the above configuration, the temperature control circuit 7a receives the hot water temperature setting signal T1. T2 is compared, and if T1≧T2, T1 is selected as the hot water temperature set value, and if T1 and T2 are still T1 and T2, a correction value To set based on T2 is added in consideration of T3 and the pipe length, and selected as the hot water temperature set value. On the other hand, the hot water temperature of the instant hot water heater 1 is detected by a hot water temperature detector 6 disposed near the outlet 2, and an actual hot water temperature signal is inputted to the temperature control circuit 7d as a controlled signal Tc. The temperature control circuit 7a compares the reference hot water temperature set value with the input signal j';Tc, and
The gas flow rate is controlled by controlling the gas proportional control valve so that both of them are maximized, and as a result, the combustion of the burner 4 is controlled.
すなわち、瞬間給湯機の出湯温度は、各混合水栓で設定
しだ湯温値の最大値に近ずくように制御される。That is, the hot water temperature of the instant hot water heater is controlled so as to approach the maximum value of the hot water temperature values set at each mixing faucet.
第3図は第2図における設定しだ湯温値が外部に出力可
能な混合水栓13および14において、温度設定部分の
構造の一例を示す。第3図において、18は従来の出湯
温度制御が可能な混合水栓の不休部分、19は設定温度
目盛、20は温度設定用のツマミ、21はポテンショメ
ータであり、そのiiJ動輔23は、混合水栓本体18
の温度設定Illの11動l1IIl118aと連動す
る。22d、ボテン/ヨメータ210本体を混合水栓の
本体部分(固定部分)に固定J−る/こめの金具である
。温度設定用のツマミ20はボテノ/ヨメータ21の町
動中由23と取付イ、ジ24に」、って同定する。この
よう、な構成に、1−、で、l関度設定用のツマミ2o
を廻して、湯温を目盛に合せると、温度設定用のツマミ
20と連動してポテンショメータ21の可動軸23も回
転し、湯温目盛に対応した位置信号が得られる。FIG. 3 shows an example of the structure of the temperature setting part in the mixing faucets 13 and 14 shown in FIG. 2, which can output the set hot water temperature value to the outside. In Fig. 3, reference numeral 18 is a constant part of a conventional mixing faucet that can control the temperature of hot water, 19 is a setting temperature scale, 20 is a temperature setting knob, 21 is a potentiometer, and the iiJ moving part 23 is a mixing faucet. Faucet body 18
The temperature setting Ill is linked with the 11th movement 11II118a. 22d is a metal fitting for fixing the main body of the button/yometer 210 to the main body part (fixed part) of the mixing faucet. The knob 20 for setting the temperature is located at the center 23 of the bottom/yometer 21 and the mounting 24. In this kind of configuration, 1-, l function setting knob 2o
When the water temperature is adjusted to the scale by turning, the movable shaft 23 of the potentiometer 21 also rotates in conjunction with the temperature setting knob 20, and a position signal corresponding to the water temperature scale is obtained.
第4図は温度制御回路7aと周辺回路構成の一例を示す
。第4図において温度制御回路7aは、1チツプマイク
ロコンピユータ16と4ビツトDA変換器16、および
パワー増幅器17によって構成する。1チツプマイクロ
コンビコータ16は、AD変換回路内蔵のLSIを使用
することによって入力回路を簡略化できる。FIG. 4 shows an example of the configuration of the temperature control circuit 7a and peripheral circuits. In FIG. 4, the temperature control circuit 7a is composed of a 1-chip microcomputer 16, a 4-bit DA converter 16, and a power amplifier 17. The one-chip microcombicoater 16 can simplify the input circuit by using an LSI with a built-in AD conversion circuit.
第6図はAD変換器を内蔵して直接アナログ信号を入力
できる1チソプマイクロコンビコ−−タ(松ト電器産業
社製M58841−XXXSP )の構成図を示す。FIG. 6 shows a configuration diagram of a 1-chisop micro combicoter (M58841-XXXSP manufactured by Matsuto Electric Industrial Co., Ltd.) which has a built-in AD converter and can directly input analog signals.
第4図において、混合水栓13および14で設定した湯
温値T1およびT2は上記で説明した原理にもとづき、
ポテンショメータの電(+’l変化としてマイクロコン
ピュータ16のアナログ入力端rK。In FIG. 4, the water temperature values T1 and T2 set at the mixing faucets 13 and 14 are based on the principle explained above.
The analog input terminal rK of the microcomputer 16 changes as the voltage (+'l) of the potentiometer changes.
お」、びに1 に入力される。被制御信号Tcは、ツー
ミスタのような湯温検知器6と直列抵抗6aとて分割し
た電位変化として同様にマイクロコンビ1−タ16のア
ナログ入力端子に2に入力される。"O" is inputted every 1. The controlled signal Tc is similarly input to the analog input terminal 2 of the microcombiner 16 as a potential change divided by a hot water temperature detector 6 such as a two mister and a series resistor 6a.
配管からの放熱を考慮して設定する補正値Toはに3に
外気温度値T3はに4にそれぞれ入力される。The correction value To, which is set in consideration of heat radiation from the piping, is input in 3, and the outside air temperature value T3 is input in 4, respectively.
マイクロコンピフータ16は、設定値T11J:びT2
の最大値をT3とToで補正するとともに湯温設定値と
被制御信号Tcを比較しつつ、4ビツトの匍11ill
(i号をり。−D3 の出力端子から出力する。The microcomputer 16 has set values T11J: and T2.
While correcting the maximum value of T3 and To, and comparing the hot water temperature set value and the controlled signal Tc,
(Output from the output terminal of -D3.
に記制御信号はDA変換器16によってアナログ信号に
変換され、パワー増幅器17を絆て、ガス比例制御弁5
を制御する。このような制御手順IL1マイクロコ/ピ
コータ15に内蔵されているプrコグラムメモリ(RO
M、2048語×9ビット)に5己1:Qされている。The control signal is converted into an analog signal by the DA converter 16, connected to the power amplifier 17, and then connected to the gas proportional control valve 5.
control. Such a control procedure is performed using the program memory (RO
M, 2048 words x 9 bits) with a ratio of 1:Q.
第6図は1−記制萌1手順をフローチャートで説明j−
(いる。Figure 6 is a flowchart explaining the 1st step of the system.
(There is.
以1.のようなriη成と動作は、混合水栓の数が増U
ll L、だ/ステ\においても同様の考え方でシステ
ムを構成することができる。Below 1. As the number of mixer faucets increases,
A system can be constructed using the same idea for ll L, da/ste\.
発明の効果
以上のように本発明の瞬間給湯システムによれば、次の
効果が期待できる。Effects of the Invention As described above, according to the instant hot water supply system of the present invention, the following effects can be expected.
(1)各混合水栓は、それ自身が自動的に湯温を制御す
る機能を備えているので、各混合水栓毎に独自の湯温設
定がoJ能である。(1) Since each mixer faucet has the function of automatically controlling the water temperature, each mixer faucet has the ability to set its own water temperature.
(2) J−記混合水栓の各湯温設定値を、瞬間給湯
機にフィードバックし、瞬間給湯機の温度制御回路は、
L記者湯温設定値の近似値が瞬間給湯機の出湯温度にな
るように制御するので、必要以上に湯温を高める必要が
ない。このだめに、配管中の放熱損失を軽減する効果が
ある。(2) Feed back each hot water temperature setting value of the J-marked mixer faucet to the instantaneous hot water heater, and the temperature control circuit of the instantaneous hot water heater:
Since the hot water temperature is controlled so that the approximate value of the hot water temperature setting value becomes the hot water temperature of the instant hot water heater, there is no need to increase the hot water temperature more than necessary. This has the effect of reducing heat radiation loss in the piping.
(3)配管の長さ、外気温を考慮して瞬間給湯機の出湯
温度の設定ができるので、使い勝手をそこなうことなく
配管中の放熱損失を軽減することができる。(3) Since the hot water temperature of the instantaneous hot water heater can be set in consideration of the length of the piping and the outside temperature, heat radiation loss in the piping can be reduced without impairing usability.
第1図は従来の胴間給湯/ステムの構成図、第2図は本
発明の一実施例である瞬間給湯装置の構成図、第3図(
a) 、 (b)は同装置6の混合水栓の尚温設定部の
側面図および甲面図、第4図は同装置び)温度制御回路
の回路図、第5図は同装置の温度制御回路に便用するマ
イクロコンビ・−夕の内部構成図、第6図は同装置の制
御手順のフローチー\・−トである。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名第
1 図
区
CIJ Q第3図
(α) (b)
[
■
ゝ−1
窮5図
−
人士力覆一ト アナログテーリタルへ
カ屯−I
A±′t)i’−h第6図Fig. 1 is a block diagram of a conventional inter-body hot water supply system/stem, Fig. 2 is a block diagram of an instantaneous hot water supply system which is an embodiment of the present invention, and Fig. 3 (
a) and (b) are a side view and a back view of the still temperature setting part of the mixing faucet of the same device 6, Figure 4 is a circuit diagram of the temperature control circuit of the same device and Figure 5 is the temperature of the same device. FIG. 6 is an internal configuration diagram of the microcombi device used for the control circuit, and is a flow chart of the control procedure of the device. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure Section CIJ Q Figure 3 (α) (b)
[ ■ ゝ-1 5th figure- Human power overturning Analog terminal to Katun-I
A±'t)i'-hFigure 6
Claims (2)
混合水栓のそれぞれの設定湯温の近似値が前記瞬間給湯
機の出湯温度になる構成とするとともに前記設定値が外
部出力できる湯温設定部を備えかつ、前記出湯温度が前
記設定値になるべく自動的に湯と“水を混合する機能を
備えてなる瞬間給湯装置。(1) A plurality of mixed faucets are provided as terminal parts, and an approximate value of the set hot water temperature of each of the plurality of mixed faucets becomes the hot water temperature of the instant hot water heater, and the set value can be outputted to the outside. An instant hot water supply device comprising a hot water temperature setting section and a function of automatically mixing hot water and water so that the hot water temperature reaches the set value.
と[7、前記入力信号の近似値をもって、基準設定湯温
とするとともに、前記近似値を外気温度信号て補正する
ように構成しだ特許請求の範囲1項記載の瞬間給湯装置
。(2) Each hot water temperature value set with a plurality of mixing taps is set as an input signal and [7. The approximate value of the input signal is used as the standard set hot water temperature, and the approximate value is corrected using the outside air temperature signal. An instantaneous water heater according to claim 1, which is constructed as follows.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57173420A JPS5963442A (en) | 1982-10-01 | 1982-10-01 | Tap-controlled hot-water supplier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP57173420A JPS5963442A (en) | 1982-10-01 | 1982-10-01 | Tap-controlled hot-water supplier |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5963442A true JPS5963442A (en) | 1984-04-11 |
JPH0132899B2 JPH0132899B2 (en) | 1989-07-11 |
Family
ID=15960114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP57173420A Granted JPS5963442A (en) | 1982-10-01 | 1982-10-01 | Tap-controlled hot-water supplier |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5963442A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006200754A (en) * | 2005-01-17 | 2006-08-03 | Noritz Corp | Hot water supply system |
JP2006234242A (en) * | 2005-02-23 | 2006-09-07 | Noritz Corp | Hot water supply system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58104806U (en) * | 1982-01-13 | 1983-07-16 | 株式会社イナックス | Indoor hot water supply equipment |
-
1982
- 1982-10-01 JP JP57173420A patent/JPS5963442A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58104806U (en) * | 1982-01-13 | 1983-07-16 | 株式会社イナックス | Indoor hot water supply equipment |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006200754A (en) * | 2005-01-17 | 2006-08-03 | Noritz Corp | Hot water supply system |
JP2006234242A (en) * | 2005-02-23 | 2006-09-07 | Noritz Corp | Hot water supply system |
Also Published As
Publication number | Publication date |
---|---|
JPH0132899B2 (en) | 1989-07-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5963442A (en) | Tap-controlled hot-water supplier | |
JPS59122828A (en) | Hot water supply system | |
JPS5929941A (en) | Tap-controlled hot-water supplying system | |
JPS5932739A (en) | Tap-controlled hot water supply system | |
JPH10170005A (en) | Floor heating system | |
JPH0411772B2 (en) | ||
JPS62166258A (en) | Cold and hot water discharge device | |
JPS5974454A (en) | Hot water supplying system | |
JPS6026238A (en) | Hot-water supply device | |
JP3785197B2 (en) | Solar hot water heater | |
KR960010322B1 (en) | Water heater | |
JP2855730B2 (en) | Water heater | |
JPH07103565A (en) | Hot water supplying device | |
JP3152011B2 (en) | Automatic hot water bath equipment | |
JP2806178B2 (en) | Water heater | |
JPS59225243A (en) | Water heater having several remote control units | |
JPS6211271B2 (en) | ||
JPS62217049A (en) | Telecontrol hot water supplier | |
JPS602522Y2 (en) | Remote control device for hot water boiler | |
JPS5942603Y2 (en) | Remote control device for hot water boiler | |
JPH0134053Y2 (en) | ||
JP2920234B2 (en) | Mixing valve system for water heater input and water heater incorporating the same | |
JP2578781B2 (en) | Water heater | |
JPH0237248A (en) | Hot-water heater | |
GB2280014A (en) | Electric instantaneous water heater |