JPH0132913B2 - - Google Patents
Info
- Publication number
- JPH0132913B2 JPH0132913B2 JP20991082A JP20991082A JPH0132913B2 JP H0132913 B2 JPH0132913 B2 JP H0132913B2 JP 20991082 A JP20991082 A JP 20991082A JP 20991082 A JP20991082 A JP 20991082A JP H0132913 B2 JPH0132913 B2 JP H0132913B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- hot water
- water
- water heater
- gas
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 148
- 238000009835 boiling Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 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
- F24H15/212—Temperature of the water
- F24H15/223—Temperature of the water in the water storage tank
- F24H15/225—Temperature of the water in the water storage tank at different heights of the tank
-
- 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
- F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
- F24H15/335—Control of pumps, e.g. on-off control
-
- 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
- F24H15/355—Control of heat-generating means in heaters
- F24H15/36—Control of heat-generating means in heaters of burners
- F24H15/365—Control of heat-generating means in heaters of burners of two or more burners, e.g. an array of burners
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)
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はガス湯沸器に関するものである。[Detailed description of the invention] Industrial applications The present invention relates to gas water heaters.
従来例の構成とその問題点
従来の例えば熱源一体型のガスボイラーにおい
ては、貯湯槽の温水を使い切ると水しか得られ
ず、貯湯槽に設定の温水を沸き上げるまでに多く
の時間を要した。また、沸上げ量は熱源から上
部、従つて貯湯槽容量のほぼ全量を沸上げる必要
があり、小量負荷の場合エネルギーのロスが多か
つた。Conventional configurations and their problems In conventional gas boilers with an integrated heat source, for example, once the hot water in the hot water tank was used up, all that was available was water, and it took a long time to boil the hot water set in the hot water tank. . In addition, it is necessary to boil the upper part of the hot water tank from the heat source, that is, almost the entire capacity of the hot water storage tank, and when the load is small, there is a lot of energy loss.
発明の目的
本発明は上記従来の欠点を解消するもので、瞬
間湯沸器を熱源とすることにより沸上げ時間を短
縮し、湯切れの確率を低下させ、さらに貯湯量の
設定を変化させることにより、使い勝手の向丈及
びエネルギーを節約する事を目的とする。Purpose of the Invention The present invention solves the above-mentioned conventional drawbacks, and uses an instantaneous water heater as a heat source to shorten the boiling time, reduce the probability of running out of hot water, and change the setting of the amount of hot water stored. The purpose is to improve usability and save energy.
発明の構成
上記目的を達するため、本発明のガスボイラー
の制御装置は、瞬間湯沸器により設定湯温の温水
を貯湯し、設定した沸上げ量まで温水が達した時
点で貯湯を停止する。その後、設定の温水の温度
が低下したことを検知する事により再度温水を貯
湯槽に送り込むという動作を繰り返す構成であ
り、ガス量調節弁を使用した瞬間湯沸器を熱源と
したことにより安定した湯温が得られ、出湯した
場合には貯湯槽内部の温水と、湯沸器からの温水
を使用出来るので、貯湯槽容量以上の湯量が使用
可能となる。さらに、沸上げ量の設定が出来るた
めに大量に温水を使用する場合には大量貯湯、夜
間等温水使用量が少ない場合には少量貯湯が可能
であるという効果を有するものである。Structure of the Invention In order to achieve the above object, the gas boiler control device of the present invention stores hot water at a set temperature using an instantaneous water heater, and stops storing hot water when the hot water reaches the set boiling amount. After that, the system repeats the operation of sending hot water into the hot water tank again when it detects that the set hot water temperature has dropped, and it is stable by using an instantaneous water heater using a gas flow control valve as the heat source. When the hot water temperature is obtained and hot water is tapped, the hot water inside the hot water storage tank and the hot water from the water heater can be used, so the amount of hot water that exceeds the capacity of the hot water storage tank can be used. Furthermore, since the amount of boiling water can be set, a large amount of hot water can be stored when a large amount of hot water is used, and a small amount can be stored when the amount of isothermal water used at night is small.
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
いて説明する。DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.
図において、１と２は連結管、３，４は連結管
１と２に接続された湯沸器、５は貯湯槽、６は出
湯管、７は入水管、８は湯沸器３に水を供給する
ポンプ、９は湯沸器４に水を供給するポンプ、１
０は湯沸器３の出湯温を検知するセンサー、１１
は湯沸器４の出湯温を検知するセンサー、１２は
湯沸器３のガス量調節弁を含むガスブロツク、１
３は湯沸器４のガス量調節弁を含むガスブロツ
ク、１４は低温サーモ、１５は制御装置、１６は
湯沸器３の燃焼制御部、１７は湯沸器４の燃焼制
御物、１８は湯沸器３のシーケンス制御部、１９
は湯沸器４のシーケンス制御部、２０は温湯設定
部、２１は湯温設定ボリユーム、２２は沸上げ量
設定部、２３は沸上げ量切替スイツチ、２４は貯
湯槽制御部、２５は指令発生部、２６，２７，２
８，２９は貯湯槽内の湯温検知センサーである。
本実施例は、沸上げ量は２段階に切替をするもの
と示した。 In the figure, 1 and 2 are connecting pipes, 3 and 4 are water heaters connected to connecting pipes 1 and 2, 5 is a hot water storage tank, 6 is a hot water outlet pipe, 7 is a water inlet pipe, and 8 is a water heater connected to water heater 3. 9 is a pump that supplies water to the water heater 4; 1 is a pump that supplies water to the water heater 4;
0 is a sensor that detects the temperature of hot water from water heater 3, 11
1 is a sensor that detects the temperature of hot water coming out of the water heater 4; 12 is a gas block that includes a gas flow control valve for the water heater 3;
Reference numeral 3 denotes a gas block including a gas amount control valve for the water heater 4, 14 a low-temperature thermostat, 15 a control device, 16 a combustion control section for the water heater 3, 17 a combustion controller for the water heater 4, and 18 a hot water Sequence control unit of boiler 3, 19
2 is a sequence control unit for the water heater 4, 20 is a hot water setting unit, 21 is a hot water temperature setting volume, 22 is a boiling amount setting unit, 23 is a boiling amount changeover switch, 24 is a hot water tank control unit, and 25 is a command generation unit. Part, 26, 27, 2
8 and 29 are hot water temperature detection sensors in the hot water storage tank.
In this example, the amount of boiling is shown to be switched in two stages.
以下、上記構成における作用について説明す
る。 Hereinafter, the effects of the above configuration will be explained.
(1) 沸上げ時
沸き上げ時は出湯が無いので、出湯管６から
の湯の流出、入水管７からの湯の流入は無い。
本図の場合は沸上げ量設定が２段階であり、全
量沸上げの時は沸上げ量切替スイツチにより沸
上げ量設定部２２から貯湯槽制御部２４に全量
沸上げの信号が得られ、湯温検知センサー２８
と２９のみが動作するようになる。半量沸上げ
の場合は、同様に湯温検知センサー２６と２７
のみが動作するようになる。ここでは全量沸上
げを説明する。湯温検知センサー２８部の温度
と湯温設定ボリユーム２１で設定された温度と
を指令発生部２５で比較し、湯温検知センサー
２８部の温度が設定よりT1＋T2℃低い場合に
は指令がシーケンス制御部１８，１９に送ら
れ、ポンプ８，９が動作することにより湯沸器
３，４が燃焼する。この時ポンプが回らなけれ
ば燃焼しないシーケンスとし空焚きを防止す
る。湯沸器の燃焼とともに、燃焼制御部１６，
１７が出湯温検知センサー１０，１１部の温度
と設定温とを比較してガス量調節弁を制御する
事により湯沸器３，４の出湯温を設定温に保
つ。湯沸器が燃焼中は、センサー２９の温度と
設定温とを比較し、センサー２９の温度が設定
温−T1℃になれば燃焼を停止し、停止すると
同時に次はセンサー２８の温度と設定温とを比
較し、この動作を繰り返すことにより貯湯温度
を設定温から設定温−（T1＋T2）℃に保つ。沸
上げ量切替スイツチが半量の時は湯温検知セン
サー２６，２７により上記全量沸上げと同様に
貯湯する。(1) During boiling Since there is no hot water during boiling, there is no outflow of hot water from the outlet pipe 6 and no inflow of hot water from the inlet pipe 7.
In the case of this figure, the boiling amount setting is in two stages, and when the boiling amount is to be fully boiled, the boiling amount changeover switch provides a full boiling signal from the boiling amount setting section 22 to the hot water storage tank control section 24, Temperature detection sensor 28
Only 29 and 29 become operational. In the case of half boiling, the water temperature detection sensors 26 and 27 are
only works now. Here, we will explain how to boil the entire amount. The command generation unit 25 compares the temperature of the hot water temperature detection sensor 28 and the temperature set by the hot water temperature setting volume 21, and issues a command if the temperature of the hot water temperature detection sensor 28 is T 1 + T 2 ℃ lower than the setting. is sent to the sequence control units 18 and 19, and the water heaters 3 and 4 are combusted by operating the pumps 8 and 9. At this time, if the pump does not turn, there will be no combustion, which prevents dry firing. Along with the combustion of the water heater, the combustion control section 16,
17 compares the temperature of the hot water temperature detection sensor 10, 11 with the set temperature and controls the gas amount control valve to maintain the hot water temperature of the hot water heaters 3, 4 at the set temperature. While the water heater is burning, the temperature of the sensor 29 is compared with the set temperature, and when the temperature of the sensor 29 reaches the set temperature - T 1 °C, the combustion is stopped, and at the same time, the temperature of the sensor 28 and the set temperature are compared. By repeating this operation, the hot water storage temperature is maintained from the set temperature to the set temperature - (T 1 + T 2 )°C. When the boiling amount changeover switch is at half the amount, hot water is stored by the hot water temperature detection sensors 26 and 27 in the same way as when the amount is boiled completely.
(2) 出湯時
基本的には沸上げ時と同様で全沸上げの時は
センサー２８，２９、半沸上げの時はセンサー
２６，２７により湯温を検知し湯沸器３，４を
燃焼、停止させる。(2) When dispensing hot water Basically the same as when boiling, the water temperature is detected by sensors 28 and 29 for full boiling, and sensors 26 and 27 for half boiling, and the water heaters 3 and 4 are fired. , to stop.
(3) 凍結防止時
湯沸器の通水路において最も冷却されやすい
部分に低温サーモ１４を取り付け、その部分が
０℃近くになると動作し指令発生部２５から指
令を送り湯沸器３，４を燃焼させサーモ部温度
がある程度昇すればサーモ１４の動作が停止す
ることにより燃焼を停止する。(3) When preventing freezing A low-temperature thermostat 14 is attached to the part of the water heater water passage that is most likely to be cooled, and when that part becomes close to 0°C, it operates and sends a command from the command generator 25 to turn on the water heaters 3 and 4. When the temperature of the thermostat rises to a certain extent due to combustion, the operation of the thermostat 14 is stopped, thereby stopping the combustion.
このように本実施例によれば、貯湯量の設定が
可能であり、また温水を使用した場合実際の貯湯
量以上の設定温の温水が使用できる。また水抜き
等をする事なしに凍結の防止もできるという効果
を有する。 As described above, according to this embodiment, it is possible to set the amount of hot water stored, and when hot water is used, it is possible to use hot water with a set temperature that is higher than the actual amount of hot water stored. It also has the effect of preventing freezing without draining water.
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
ができる。Effects of the Invention As described above, according to the present invention, the following effects can be obtained.
(1) 沸上げ量の設定ができるために、必要量のみ
の貯湯が可能になり昼間夜間あるいは季節によ
つての使用量に応じた温水が有効に使用でき
る。(1) Since the amount of boiling water can be set, it is possible to store only the required amount of hot water, and hot water can be effectively used during the day and at night, or according to the amount of water used depending on the season.
(2) 温水を使用した場合、貯湯槽内のみの温水だ
けでなく湯沸器からの温水も使用可能なため実
際の貯湯量以上の温水が１時期に使用でき、湯
切れの確率が低下する。(2) When using hot water, not only the hot water in the hot water storage tank but also the hot water from the water heater can be used, so more hot water than the actual amount of hot water stored can be used at one time, reducing the probability of running out of hot water. .
(3) 温水の使用量が湯沸器の出湯量以下であれ
ば、長期間の連続使用が可能である。(3) If the amount of hot water used is less than the output of the water heater, continuous use for a long period of time is possible.
(4) 万一湯切れした場合でも、完全に水になると
いうことはなく出湯量によつては設定温で使用
でき、また出湯量が増加した場合では設定温か
ら一定温低下しただけの温水が使用できる。(4) Even if the hot water runs out, it will not become completely cold and depending on the amount of hot water that comes out, it can be used at the set temperature, and if the amount of hot water that comes out increases, the hot water will only be a certain temperature lower than the set temperature. can be used.
図は本発明の一実施例であるガス湯沸器の構成
図である。
１，２……連結管、３，４……湯沸器、５……
貯湯槽、６……出湯管、７……入水管、８，９…
…ポンプ、１０，１１……出湯温検知センサー、
１２，１３……ガスブロツク、１４……低温サー
モ、１５……制御装置、２１……湯温設定ボリユ
ーム、２３……沸上げ量切替スイツチ。
The figure is a configuration diagram of a gas water heater that is an embodiment of the present invention. 1, 2... Connecting pipe, 3, 4... Water heater, 5...
Hot water storage tank, 6... hot water outlet pipe, 7... water inlet pipe, 8, 9...
... Pump, 10, 11... Hot water temperature detection sensor,
12, 13...Gas block, 14...Low temperature thermometer, 15...Control device, 21...Hot water temperature setting volume, 23...Boiling amount switching switch.
Claims (1)
センサーを有する貯湯槽と、ガス量調節弁及び湯
沸器の出口温度を検知する出湯温検知センサーを
有する１つあるいは複数個の湯沸器と、貯湯槽と
湯沸器を連結する連結管と、湯温設定手段と、沸
上げ量設定手段とを備え、前記出湯温検知センサ
ーにより検知した温度と設定温度との差を湯沸器
制御信号とし、この湯沸器制御信号により１つあ
るいは複数個の湯沸器の出湯温を設定温度に保
ち、前記貯湯槽に設定温度の温水を上部から順に
貯湯すると共に、前記沸上げ量設定に応じた湯温
検知センサーにより貯湯槽内の温度上昇を検知
し、必要に応じた温度及び貯湯量を得られる構成
としたガス湯沸器。 ２ 沸上げ量設定に応じた湯温検知センサー部の
温度が設定温からＴ℃低い温度に達した時点で湯
沸器の燃焼を停止すると共に、設定温を制御的に
ΔT℃下げ、時間経過あるいは負荷により前記湯
温検知センサー部の温度が初期の設定温よりＴ＋
ΔT℃低下した時点で再び燃焼を開始すると共に
設定温を復帰させる構成とした特許請求の範囲第
１項記載のガス湯沸器。 ３ 沸上げ量設定に応じた湯温検知センサーを貯
湯槽に対して上下に２個備え、下部センサー部の
温度が設定よりT1℃低い温度に達した時点で湯
沸器の燃焼を停止し、時間経過あるいは負荷によ
り上部センサーの温度が設定よりT1＋T2℃低い
温度になつた時点で再び燃焼を開始する構成とし
た特許請求の範囲第１項記載のガス湯沸器。 ４ 湯沸器の最も冷却しやすい部分に低温サーモ
を備え、０℃近くに温度が低下すると前記低温サ
ーモが動作し、湯沸器の燃焼を開始させ温度が
TT℃上昇すると低温サーモにより燃焼を停止さ
せる構成とした特許請求の範囲第２項または第３
項記載のガス湯沸器 ５ 貯湯槽から湯沸器に水を供給する連結管にポ
ンプを備え、前記ポンプの動作により水が流れて
いる事を検知した上で、湯沸器の燃焼が開始する
構成とした特許請求の範囲第２項〜第４項のいず
れか１つに記載のガス湯沸器。[Scope of Claims] 1. A hot water storage tank having a plurality of hot water temperature detection sensors that detect the temperature inside the hot water storage tank, and one having a gas flow rate control valve and an outlet hot water temperature detection sensor that detects the outlet temperature of the water heater. Alternatively, it includes a plurality of water heaters, a connecting pipe connecting the water storage tank and the water heater, a hot water temperature setting means, and a boiling amount setting means, so that the temperature detected by the hot water temperature detection sensor and the set temperature can be adjusted. The difference between the two is used as a water heater control signal, and this water heater control signal is used to maintain the outlet water temperature of one or more water heaters at a set temperature, and to store hot water at the set temperature in the hot water storage tank in order from the top. A gas water heater configured to detect a temperature rise in the hot water storage tank with a hot water temperature detection sensor according to the boiling amount setting, and to obtain the temperature and hot water storage amount as required. 2 When the temperature of the hot water temperature detection sensor according to the boiling amount setting reaches a temperature T°C lower than the set temperature, the combustion of the water heater is stopped, and the set temperature is controlled to be lowered by ΔT°C, and the time elapses. Or, due to the load, the temperature of the hot water temperature detection sensor section may be T+ higher than the initial set temperature.
2. The gas water heater according to claim 1, wherein the gas water heater is configured to restart combustion and restore the set temperature when ΔT° C. decreases. 3 Equipped with two hot water temperature detection sensors above and below the hot water tank according to the boiling amount setting, and the water heater stops combustion when the temperature at the lower sensor reaches T 1 ℃ lower than the setting. 2. The gas water heater according to claim 1, wherein the gas water heater is configured to start combustion again when the temperature of the upper sensor becomes T 1 +T 2 °C lower than the setting due to the passage of time or load. 4 A low-temperature thermostat is installed in the part of the water heater that is easiest to cool, and when the temperature drops to near 0°C, the low-temperature thermostat operates, causing the water heater to start burning and lowering the temperature.
Claim 2 or 3 has a structure in which combustion is stopped by a low-temperature thermostat when T
Gas water heater 5 described in Section 5: A pump is provided in the connecting pipe that supplies water from the water storage tank to the water heater, and when the pump detects that water is flowing through the operation of the pump, combustion in the water heater starts. A gas water heater according to any one of claims 2 to 4, which is configured to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209910A JPS59100336A (en) | 1982-11-29 | 1982-11-29 | Gas hot water supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57209910A JPS59100336A (en) | 1982-11-29 | 1982-11-29 | Gas hot water supplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59100336A JPS59100336A (en) | 1984-06-09 |
| JPH0132913B2 true JPH0132913B2 (en) | 1989-07-11 |
Family
ID=16580672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57209910A Granted JPS59100336A (en) | 1982-11-29 | 1982-11-29 | Gas hot water supplier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59100336A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6479541A (en) * | 1987-09-21 | 1989-03-24 | Chubu Electric Power | Hot-water supplier |
| JPH0264846U (en) * | 1988-11-05 | 1990-05-16 | ||
| JPH02183761A (en) * | 1989-01-05 | 1990-07-18 | Toshiba Corp | Hot water storing type water heater |
| JPH02203151A (en) * | 1989-02-02 | 1990-08-13 | Matsushita Electric Ind Co Ltd | Electric hot-water supplier |
| CN104567091B (en) * | 2013-10-25 | 2017-03-01 | 矢崎能源系统公司 | hot water heating absorption refrigerator |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567940A (en) * | 1979-06-29 | 1981-01-27 | Tokyo Gas Co Ltd | Supplied hot water temperature control system for centralized hot water feeder |
| JPS57152548A (en) * | 1981-03-17 | 1982-09-20 | Hitachi Maxell Ltd | Manufacture of magnetic recording medium |
-
1982
- 1982-11-29 JP JP57209910A patent/JPS59100336A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS567940A (en) * | 1979-06-29 | 1981-01-27 | Tokyo Gas Co Ltd | Supplied hot water temperature control system for centralized hot water feeder |
| JPS57152548A (en) * | 1981-03-17 | 1982-09-20 | Hitachi Maxell Ltd | Manufacture of magnetic recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59100336A (en) | 1984-06-09 |
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