JPH0584425B2 - - Google Patents
Info
- Publication number
- JPH0584425B2 JPH0584425B2 JP20915185A JP20915185A JPH0584425B2 JP H0584425 B2 JPH0584425 B2 JP H0584425B2 JP 20915185 A JP20915185 A JP 20915185A JP 20915185 A JP20915185 A JP 20915185A JP H0584425 B2 JPH0584425 B2 JP H0584425B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- water
- water inlet
- sheathed heater
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 230000002265 prevention Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000005856 abnormality Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、シヤワー等の加熱用に利用される
電気瞬間湯沸器に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an electric instantaneous water heater used for heating showers and the like.
従来の技術
従来のこの種の電気瞬間湯沸器は、例えば米国
特許第4358665号明細書に示されているように、
第４図のような構造になつていた。すなわち正常
使用時はバルブ１を開くと連動して圧力スイツチ
２がオンされ、シーズヒータ３が通電状態とな
る。そしてバルブ１から入水管４を通つて、タン
ク５下部へ入水した水は、シーズヒータ３で加熱
されながらタンク５上部へ向い、出湯管６より出
湯される。次に、例えばバルブ１と圧力スイツチ
２が連動せずにバルブ１を閉じても、シーズヒー
タ３が通電状態のままのような、異常時（以後、
単に「異常時」と言うには、タンク５内の水温と
シーズヒータ３のＵ曲げ部３ａの温度が上昇し、
そして温度過昇防止用のサーモスタツト７が動作
し、シーズヒータ３への通電を止めるようになつ
ている。Prior Art A conventional electric instantaneous water heater of this kind is, for example, as shown in U.S. Pat. No. 4,358,665.
The structure was as shown in Figure 4. That is, during normal use, when the valve 1 is opened, the pressure switch 2 is turned on and the sheathed heater 3 is energized. The water that enters the lower part of the tank 5 from the valve 1 through the water inlet pipe 4 is heated by the sheathed heater 3 while flowing toward the upper part of the tank 5 and is discharged from the hot water outlet pipe 6. Next, in the event of an abnormality (hereinafter referred to as
Simply saying "at an abnormal time" means that the water temperature in the tank 5 and the temperature of the U-bend portion 3a of the sheathed heater 3 rise,
Then, a thermostat 7 for preventing excessive temperature rise is activated, and the power supply to the sheathed heater 3 is stopped.
発明が解決しようとする問題点
しかしこのような構造のものでは、異常時に温
度過昇防止用のサーモスタツト７が動作するまで
時間がかかり、沸騰水が出湯管６から噴出した
り、ケース等が変形したりして、危険な状態にな
るという問題があつた。これは下記の理由によ
る。Problems to be Solved by the Invention However, with such a structure, it takes time for the thermostat 7 for preventing excessive temperature rise to operate in the event of an abnormality, and boiling water may spout from the hot water tap 6 or the case may be damaged. There was a problem that it could become deformed and become dangerous. This is due to the following reasons.
つまり、正常使用時サーモスタツト７の感温部
７ａ近傍のタンク５内の水量は、シーズヒータ３
で加熱された後でタンク内の水温としては、最も
高い部分であり、かつ、感温部７ａはヒータＵ曲
げ部３ａからの伝導熱で常に高温に保たれており
異常時には、ヒータＵ曲げ部３ａの熱は周囲の水
に奪われるため、感温部７ａは異常時での温度上
昇のスピードが遅い部分である。また、温度過昇
防止装置の動作オフ温度は正常使用時の最高温度
に対し誤動作防止のためある程度の余裕を持つて
（10℃以上）設定されるが、ヒータＵ曲げ部３ａ
とタンク５内面とのろう付等の接触状態により熱
伝導のバラツキが生ずるので、その余裕を大きく
しなければならないし、第５図に示すように、正
常使用時のサーモスタツト７の感熱部７ａの温度
は、出湯量を小さくすれば高くなるため、サーモ
スタツト７の動作オフ温度は、高い値に設定しな
ければならない。そのため、異常時、サーモスタ
ツト７がオフ動作するまで時間がかかり、タンク
５内の水が沸騰し、出湯管６から噴出したり、ケ
ース（図省略）等が変形するなど危険な状態にな
るのであつた。 In other words, during normal use, the amount of water in the tank 5 near the temperature sensing part 7a of the thermostat 7 is
This is the highest temperature of the water in the tank after being heated, and the temperature-sensing part 7a is always kept at a high temperature by conduction heat from the heater U-bend 3a. Since the heat of the temperature sensing portion 3a is absorbed by the surrounding water, the temperature of the temperature sensing portion 7a is a portion whose temperature rises slowly in an abnormal situation. In addition, the operation off temperature of the overtemperature rise prevention device is set with a certain margin (10°C or more) compared to the maximum temperature during normal use to prevent malfunction.
Since variations in heat conduction occur depending on the state of contact such as brazing between the thermostat 7 and the inner surface of the tank 5, a large margin must be made for this, and as shown in FIG. Since the temperature increases as the amount of hot water is reduced, the operating off temperature of the thermostat 7 must be set to a high value. Therefore, in the event of an abnormality, it takes time for the thermostat 7 to turn off, causing the water in the tank 5 to boil and eject from the hot water tap 6, or the case (not shown) to be deformed, creating a dangerous situation. It was hot.
そこで、本発明は異常時迅速に、加熱ヒータへ
の通電を止め、危険な状態になるのを防ぐように
するものである。 Therefore, the present invention is intended to quickly stop the power supply to the heater in the event of an abnormality to prevent a dangerous situation.
問題点を解決するための手段
そして上記問題点を解決する本発明の技術的手
段は、シーズヒータのコイル軸心とタンク軸心を
ずらすことによつて生じるタンク内空間部のタン
ク底面には入水管の入水口をこの軸心上のタンク
上面に、温度過昇防止装置の感温部をこのタンク
上面の空間部側にシーズヒータのリード部を取付
けるものである。Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is that the sheathed heater's coil axis and tank axis are misaligned, so that the bottom surface of the tank in the tank internal space is not penetrated. The water inlet of the water pipe is attached to the upper surface of the tank on this axis, and the temperature sensing part of the overtemperature rise prevention device is attached to the lead part of the sheathed heater on the space side of the upper surface of the tank.
作 用 この技術的手段による作用は次のようになる。Effect The effect of this technical means is as follows.
すなわち、正常使用時は、入水管からタンクへ
入水した水が、タンク上面の温度過昇防止装置の
感温部付近まで一旦上昇した後、反転しタンク下
方へ向かいながら、加熱された出湯管より出湯さ
れるため、温度過昇防止装置の感温部やシーズヒ
ータのリード部は、入水により常に冷却されてい
ることになる。一方、入水が止められ、シーズヒ
ータが通電状態のままの異常時では、温度過昇防
止装置の感温部は、入水による冷却作用もなく、
タンク上面であり、シーズヒータリード部から近
い位置であるので、タンク内の熱の対流とシーズ
ヒータリード部からの熱の伝導により急速に加熱
される。 In other words, during normal use, water enters the tank from the water inlet pipe, rises to the vicinity of the temperature-sensing part of the overtemperature prevention device on the top of the tank, then reverses and heads downwards into the tank until it flows out from the heated outlet pipe. Since the hot water is tapped out, the temperature-sensing part of the overtemperature rise prevention device and the lead part of the sheathed heater are constantly cooled by the inflow of water. On the other hand, in an abnormal situation when water is stopped and the sheathed heater remains energized, the temperature sensing part of the overtemperature rise prevention device has no cooling effect due to the water entering.
Since it is on the top of the tank and close to the sheathed heater lead, it is rapidly heated by heat convection within the tank and heat conduction from the sheathed heater lead.
この結果、異常時において、迅速にシーズヒー
タへの通電を止め、危険な状態になるのを防ぎ、
また正常使用時において、シーズヒータのリード
部は入水により常に冷却されておりリード部内の
封口部やスポツト部の温度を低く保ち、シーズヒ
ータの信頼性を高めるのである。 As a result, in the event of an abnormality, the power to the sheathed heater can be quickly stopped, preventing dangerous situations.
Furthermore, during normal use, the lead portion of the sheathed heater is constantly cooled by water entering the lead portion, keeping the temperature of the sealing portion and spot portion within the lead portion low, thereby increasing the reliability of the sheathed heater.
実施例
以下、本発明の一実施例を添付図面にもとづい
て説明する。Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.
第１図において、８は円筒状の銅製のタンク
で、このタンク８内には、タンク８軸心から偏心
させた位置に、コイル軸心を有し、リード部９ａ
をタンク８空間部８ａ側のタンク上面８ｂに水密
にろう付された。コイル状のシーズヒータ９と、
このシーズヒータ９のコイル軸心と、軸心が一致
し、その外径は、シーズヒータ９のコイル内径よ
り僅かに小さく、かつタンク８からの流出口１０
ａ端面が、タンク底面８ｃに接するように、タン
ク上面８ｂに水密にろう付された逆Ｕ字形の出湯
管１０と、シーズヒータ９の反対側の空間部８ａ
のタンク底面８ｃには、入水口１１ａが絞られた
入水管１１が水密にろう付けされており、この入
水管１１の軸心上のタンク上面８ｂに感温部１２
ａを接した、温度過昇防止用のサーモスタツト１
２が取付られている。 In FIG. 1, 8 is a cylindrical copper tank, and inside this tank 8, there is a coil axis at a position eccentric from the axis of the tank 8, and a lead portion 9a.
was watertightly brazed to the tank top surface 8b on the tank 8 space 8a side. a coiled sheathed heater 9;
The axial center of the coil of this sheathed heater 9 coincides with the axial center, and its outer diameter is slightly smaller than the inner diameter of the coil of the sheathed heater 9, and the outflow port 10 from the tank 8
An inverted U-shaped hot water tap 10 is watertightly brazed to the tank top surface 8b so that the end surface a contacts the tank bottom surface 8c, and a space 8a on the opposite side of the sheathed heater 9.
A water inlet pipe 11 with a constricted water inlet 11a is watertightly brazed to the tank bottom surface 8c, and a temperature sensing part 12 is mounted on the tank top surface 8b on the axis of the water inlet pipe 11.
Thermostat 1 for preventing excessive temperature rise, connected to a
2 is installed.
次にこの一実施例における作用を説明する。ま
ず正常使用時について説明する。この場合バルブ
１３を開くと、圧力スイツチ１４が連動してオン
され、シーズヒータ９が通電状態となる。そして
入水管１１よりタンク８内へ流入する水は、入水
管１１の入水口１１ａで絞られ、加速され、空間
部８ａを通り、タンク８上部まで到達し、サーモ
スタツト１２の感温部１２ａ下のタンク上面８ｂ
内壁に当り、反転拡散され、今度はシーズヒータ
９により加熱されながら、タンク８下部へ向い、
流出口１０ａから出湯管１０へ流入し、出湯管１
０へ流入し、出湯管１０内を通つて出湯される。
またバルブ１３を閉じると、連動して圧力スイツ
チ１４がオフされ、シーズヒータ９への通電が止
まる。次に異常時について説明する。この場合バ
ルブ１３を閉じると、タンク８への水の流入はな
くなるが、シーズヒータ９は通電状態のままであ
るので、タンク８内の水は急速に加熱され、熱対
流により特に、タンク８上部の水温が上がる。さ
らに、リード部９ａからの熱伝導とでサーモスタ
ツト１２の感熱部１２ａ温度は急速に上昇し、サ
ーモスタツト１２がオフ動作し、シーズヒータ９
への通電が止められる。すなわちサーモスタツト
１２の感熱部の温度は、正常使用時は、入水によ
つて冷却されるため第３図に示すように、低温に
保たれるので、サーモスタツト１２の動作オフ温
度を低く設定でき、また、異常時には、入水によ
る冷却効果がなくなるため、急速に温度が上昇し
短時間でオフ動作しシーズヒータ９への通電が止
まるので、沸騰水の出湯管１０からの噴出や、ケ
ース等の変形等の危険な状態になるのを防ぐ。 Next, the operation of this embodiment will be explained. First, normal use will be explained. In this case, when the valve 13 is opened, the pressure switch 14 is turned on in conjunction, and the sheathed heater 9 is energized. The water flowing into the tank 8 from the water inlet pipe 11 is throttled and accelerated by the water inlet 11a of the water inlet pipe 11, passes through the space 8a, reaches the upper part of the tank 8, and reaches the bottom of the temperature sensing part 12a of the thermostat 12. tank top surface 8b
It hits the inner wall, is reversely diffused, and is then heated by the sheathed heater 9 while heading toward the bottom of the tank 8.
The hot water flows into the outlet pipe 10 from the outlet 10a, and the hot water flows into the outlet pipe 1.
0 and is discharged through the hot water discharge pipe 10.
Further, when the valve 13 is closed, the pressure switch 14 is turned off in conjunction with the closing of the valve 13, and the power supply to the sheathed heater 9 is stopped. Next, abnormal situations will be explained. In this case, when the valve 13 is closed, water will no longer flow into the tank 8, but since the sheathed heater 9 remains energized, the water in the tank 8 will be rapidly heated, and the water in the tank 8 will be heated particularly in the upper part of the tank 8 due to thermal convection. water temperature increases. Furthermore, the temperature of the heat sensitive part 12a of the thermostat 12 rises rapidly due to heat conduction from the lead part 9a, the thermostat 12 turns off, and the sheathed heater 9
Power is cut off. In other words, during normal use, the temperature of the heat sensitive part of the thermostat 12 is kept at a low temperature as shown in Fig. 3 because it is cooled by water entering it, so the operating off temperature of the thermostat 12 can be set low. In addition, in the event of an abnormality, the cooling effect of water entering is lost, so the temperature rises rapidly and turns off in a short time, stopping power supply to the sheathed heater 9. Prevent dangerous conditions such as deformation.
また本実施例においては、シーズヒータ９のリ
ード部９ａが、タンク８内空間部８ａ側のタンク
上面８ｂにろう付されているため、正常使用時は
リード部９ａが常に入水によつて冷却されている
ため、第２図に示すリード部９ａ内の端子部１５
とヒータ素線１６とのスポツト部１７や封口用樹
脂部１８の温度を低く保つことができ、シーズヒ
ータ９の信頼性を高めることができる。さらに、
異常時には、リード部９ａからの熱伝導で、急速
にサーモスタツト１２の感熱部１２ａの温度が上
昇しオフ動作温度に達し危険な状態にならない。 Furthermore, in this embodiment, the lead portion 9a of the sheathed heater 9 is brazed to the tank top surface 8b on the side of the inner space 8a of the tank 8, so that the lead portion 9a is always cooled by water entering during normal use. Therefore, the terminal portion 15 in the lead portion 9a shown in FIG.
The temperature of the spot portion 17 between the heater wire 16 and the sealing resin portion 18 can be kept low, and the reliability of the sheathed heater 9 can be improved. moreover,
In the event of an abnormality, the temperature of the heat-sensitive portion 12a of the thermostat 12 rises rapidly due to heat conduction from the lead portion 9a, and reaches the OFF operating temperature, so that no dangerous situation occurs.
また本実施例においては、入水管１１の先端の
入水口１１ａが絞られているので、組立時タンク
８に入水管１１を挿入し易い。 Further, in this embodiment, since the water inlet 11a at the tip of the water inlet pipe 11 is narrowed, it is easy to insert the water inlet pipe 11 into the tank 8 during assembly.
発明の効果
本発明は、筒状タンクの軸心から偏心させた位
置にコイル軸心を有するコイル状に形成したシー
ズヒータを備え、このシーズヒータのコイル軸心
とタンク軸心をずらすことによつて、形成される
タンク内の空間部のタンク底面には、入水管を備
え、この入水管の軸心上のタンク上面には、温度
過昇防止装置の感熱部を備えたものであるので、
この感熱部は、正常使用時は、入水によつて冷却
され、異常時はタンク内の熱対流とシーズヒータ
リード部からの熱伝導によつて急速に温度上昇
し、動作オフ温度に達し、沸騰水の噴出やケース
の変形等の危険な状態になるのを防ぐことができ
る。また正常使用時においてシーズヒータのリー
ド部は入水により常に冷却されており、リード部
内の封口部やスポツト部の温度を低く保ちシーズ
ヒータの信頼性を高めることができる。Effects of the Invention The present invention includes a sheathed heater formed in a coil shape having a coil axis at a position eccentric from the axis of a cylindrical tank, and by shifting the coil axis of the sheathed heater from the tank axis. Therefore, a water inlet pipe is provided on the bottom of the tank in the space inside the tank, and a heat sensitive part of the overtemperature rise prevention device is provided on the upper surface of the tank on the axis of this water inlet pipe.
During normal use, this heat-sensitive section is cooled by water entering the unit, but when an abnormality occurs, the temperature rises rapidly due to heat convection within the tank and heat conduction from the sheathed heater lead, and reaches the operating off temperature, causing it to boil. This can prevent dangerous situations such as water gushing out and deformation of the case. Further, during normal use, the lead portion of the sheathed heater is constantly cooled by water intrusion, and the temperature of the sealing portion and spot portion within the lead portion can be kept low and the reliability of the sheathed heater can be increased.
第１図は本発明の一実施例の電気瞬間湯沸器の
熱交ユニツトの縦断面図、第２図は同加熱ヒータ
ろう付部付近の拡大縦断面図、第３図は出湯量と
同温度過昇防止装置感温部温度の関係を示す特性
図、第４図は従来の電気瞬間湯沸器の熱交ユニツ
トの縦断面図、第５図は従来の電気瞬間湯沸器の
出湯量と温度過昇防止装置感温部温度の関係を示
す特性図である。
８……タンク、８ａ……空間部、８ｂ……タン
ク上面、８ｃ……タンク底面、９……シーズヒー
タ、９ａ……リード部、１０……出湯管、１０ａ
……流出口、１１……入水管、１１ａ……入水
口、１２……温度過昇防止装置（サーモスタツ
ト）、１２ａ……感温部。
Fig. 1 is a longitudinal sectional view of a heat exchanger unit of an electric instantaneous water heater according to an embodiment of the present invention, Fig. 2 is an enlarged longitudinal sectional view of the vicinity of the brazed part of the heater, and Fig. 3 is an enlarged longitudinal sectional view showing the amount of hot water dispensed. A characteristic diagram showing the relationship between the temperature of the temperature sensing part of the temperature overrise prevention device. Figure 4 is a vertical cross-sectional view of the heat exchanger unit of a conventional electric instantaneous water heater. Figure 5 is the hot water output of a conventional electric instantaneous water heater. It is a characteristic diagram which shows the relationship between and the temperature of the temperature sensing part of the temperature overrise prevention device. 8...tank, 8a...space, 8b...tank top surface, 8c...tank bottom surface, 9...sheathed heater, 9a...lead part, 10...molten metal outlet pipe, 10a
... Outlet, 11 ... Water inlet, 11a ... Water inlet, 12 ... Temperature rise prevention device (thermostat), 12a ... Temperature sensing section.
Claims (1)
内にはコイル状に形成したシーズヒータと、前記
タンクから加熱された水を出湯するための出湯管
と、前記タンクに水を入水するための入水管とを
備え、前記シーズヒータは、そのコイル軸心が、
垂直でかつ前記筒状のタンク軸心とはずらした位
置に設け、この軸心のずれによつて生じる前記タ
ンク内の空間部の前記タンク底面には前記入水管
の入水口を設け、前記空間部の前記タンク上面で
かつ前記入水管の軸心上には前記タンクの温度が
異常に上昇したとき、前記シーズヒータへの通電
を遮断する温度過昇防止装置の感温部を設け、前
記タンク上面でかつ前記空間部側には前記シーズ
ヒータのリード部を設けた電気瞬間湯沸器。 ２ 入水口は入水管の他の部分により絞られた特
許請求の範囲第１項記載の電気瞬間湯沸器。[Scope of Claims] 1. A cylindrical tank placed vertically, a sheathed heater formed in a coil shape in the tank, a hot water outlet pipe for discharging heated water from the tank, and the tank. and a water inlet pipe for injecting water into the sheathed heater, and the sheathed heater has a coil axis that is
The water inlet of the water inlet pipe is provided at a position that is vertical and offset from the axial center of the cylindrical tank, and the water inlet of the water inlet pipe is provided on the bottom surface of the tank in a space inside the tank caused by the misalignment of the axial center. A temperature sensing part of an overtemperature rise prevention device is provided on the upper surface of the tank and on the axis of the water inlet pipe to cut off electricity to the sheathed heater when the temperature of the tank rises abnormally; An electric instantaneous water heater, wherein a lead portion of the sheathed heater is provided on the upper surface and on the side of the space portion. 2. The electric instantaneous water heater according to claim 1, wherein the water inlet is narrowed by another part of the water inlet pipe.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60209151A JPS6269060A (en) | 1985-09-20 | 1985-09-20 | Electric instantaneous water heater |
| EP86109922A EP0209867B1 (en) | 1985-07-22 | 1986-07-19 | Electric instantaneous boiler |
| DE8686109922T DE3680161D1 (en) | 1985-07-22 | 1986-07-19 | ELECTRIC WATER HEATER. |
| US06/887,924 US4786782A (en) | 1985-07-22 | 1986-07-22 | Electric instantaneous water heater with enhanced temperature control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60209151A JPS6269060A (en) | 1985-09-20 | 1985-09-20 | Electric instantaneous water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6269060A JPS6269060A (en) | 1987-03-30 |
| JPH0584425B2 true JPH0584425B2 (en) | 1993-12-01 |
Family
ID=16568156
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60209151A Granted JPS6269060A (en) | 1985-07-22 | 1985-09-20 | Electric instantaneous water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6269060A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2629706B2 (en) * | 1987-05-15 | 1997-07-16 | 松下電器産業株式会社 | Water heater |
| KR100415377B1 (en) * | 2001-12-28 | 2004-01-16 | 최진민 | A Structure of Heat-Exchange-Tank for Wall Type Household Hot-Water Boiler |
| JP5729721B2 (en) * | 2011-07-20 | 2015-06-03 | 日清オイリオグループ株式会社 | Flower paste |
| JP6032120B2 (en) * | 2013-03-12 | 2016-11-24 | 株式会社デンソー | Fuel heating device and fuel rail provided with the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59115931A (en) * | 1982-12-21 | 1984-07-04 | Matsushita Electric Ind Co Ltd | Heat exchanger for electric tap-controlled hot water supplier |
| JPS59183238A (en) * | 1983-04-04 | 1984-10-18 | Matsushita Electric Ind Co Ltd | Electrical water heater |
-
1985
- 1985-09-20 JP JP60209151A patent/JPS6269060A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59115931A (en) * | 1982-12-21 | 1984-07-04 | Matsushita Electric Ind Co Ltd | Heat exchanger for electric tap-controlled hot water supplier |
| JPS59183238A (en) * | 1983-04-04 | 1984-10-18 | Matsushita Electric Ind Co Ltd | Electrical water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6269060A (en) | 1987-03-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |