JP2730230B2 - Water heater - Google Patents
Water heaterInfo
- Publication number
- JP2730230B2 JP2730230B2 JP1320007A JP32000789A JP2730230B2 JP 2730230 B2 JP2730230 B2 JP 2730230B2 JP 1320007 A JP1320007 A JP 1320007A JP 32000789 A JP32000789 A JP 32000789A JP 2730230 B2 JP2730230 B2 JP 2730230B2
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- water supply
- pipe
- supply pipe
- flow rate
- 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 - Fee Related
Links
Landscapes
- Electrically Driven Valve-Operating Means (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は冷水を温水に熱交換する給湯機に関するもの
である。Description: TECHNICAL FIELD The present invention relates to a water heater for exchanging heat from cold water to hot water.
従来の技術 従来この種の技術は第３図のごとく構成されている。
第３図において、１は入水管であり、２の入水管１には
水量センサ２が設けられている。前記入水管１は熱交換
器３に配管され前記熱交換器３からは出湯管４が配接さ
れ、この出湯管４にはモータ５で駆動される流量調節弁
６が配設されている。前記流量調節弁６からは第１の給
湯管７と第２の給湯管８が分岐され、前記第１の給湯管
７の先端は蛇口９へ、前記第２の給湯管８の先端は浴槽
10へ配管されている。11はバイパス管であり入水管１と
第１の給湯管７とを配接している。尚、12は前記バイパ
ス管11に接けられた流量スイッチであり、13は電磁弁で
ある。14はバーナを示す。15は第２の給湯管８に設けら
れた電磁弁である。2. Description of the Related Art Conventionally, this kind of technology is configured as shown in FIG.
In FIG. 3, reference numeral 1 denotes a water inlet pipe, and a water inlet sensor 1 is provided with a water amount sensor 2. The water inlet pipe 1 is connected to a heat exchanger 3, and a tapping pipe 4 is connected to the heat exchanger 3. The tapping pipe 4 is provided with a flow control valve 6 driven by a motor 5. A first hot water supply pipe 7 and a second hot water supply pipe 8 are branched from the flow control valve 6, and a tip of the first hot water supply pipe 7 is connected to a faucet 9, and a tip of the second hot water supply pipe 8 is connected to a bathtub.
Piped to 10. Reference numeral 11 denotes a bypass pipe which connects the water inlet pipe 1 and the first hot water supply pipe 7. Reference numeral 12 denotes a flow rate switch connected to the bypass pipe 11, and reference numeral 13 denotes a solenoid valve. 14 indicates a burner. Reference numeral 15 denotes an electromagnetic valve provided on the second hot water supply pipe 8.
この様に構成された従来例における動作を説明する
と、先ず蛇口９で給湯を行なう場合、電磁弁13,14は閉
成状態となっている。この時入水管１から入った水は熱
交換器３でバーナ14の燃焼により熱交換され温水となっ
て蛇口９から出湯される。この時、蛇口９から出る湯温
を設定温度に保つため、水の流量を流量調節弁６で調節
する。例えば70℃の高温に設定器を設定すると流量を絞
り、40℃の低温に設定すると流量を多く流す。（設定器
は図示せず） 一方第２の給湯管８から浴槽10に給湯する時には、設
定器をONすると電磁弁15が開成し設定された温度の湯が
浴槽10へ給湯される。またこの際給湯される温度調節は
前記流量調節弁６により調節される。浴槽10への給湯量
が設定量に達すると、電磁弁15がOFFし給湯が停止され
る。一般に浴槽へは45℃前後の浴槽湯張り動作と80℃前
後の浴槽沸き上げ動作がある。The operation of the conventional example configured as described above will be described. First, when hot water is supplied by the faucet 9, the solenoid valves 13 and 14 are closed. At this time, the water that has entered through the water inlet pipe 1 is exchanged heat by the combustion of the burner 14 in the heat exchanger 3, becomes hot water, and is discharged from the faucet 9. At this time, the flow rate of water is adjusted by the flow control valve 6 in order to keep the temperature of hot water coming out of the faucet 9 at the set temperature. For example, when the setting device is set to a high temperature of 70 ° C., the flow rate is reduced. (On the other hand, the setting device is not shown.) On the other hand, when hot water is supplied from the second hot water supply pipe 8 to the bathtub 10, when the setting device is turned on, the electromagnetic valve 15 is opened and hot water at the set temperature is supplied to the bathtub 10. At this time, the temperature of the hot water is controlled by the flow control valve 6. When the amount of hot water supplied to bathtub 10 reaches the set amount, solenoid valve 15 is turned off and hot water supply is stopped. Generally, there are a bathtub filling operation at around 45 ° C and a bathtub boiling operation at around 80 ° C.
発明が解決しようとする課題 しかしながら、従来例においては流量調節弁６と電磁
弁15の２台を用いて動作するため、アクチェータが２ヶ
使いとなりコスト高となると共に、大型化していた。Problems to be Solved by the Invention However, in the conventional example, since the operation is performed using the two flow control valves 6 and the solenoid valve 15, two actuators are used, which increases the cost and increases the size.
そこで本発明の目的は、ワンアクチェータで第１の給
湯管、及び第２の給湯管の相方を流量制御すると共に、
前記第２の給湯管の開閉動作も行なわせ、安価でかつコ
ンパクト化を図ることにある。Therefore, an object of the present invention is to control the flow rates of the first hot water supply pipe and the second hot water supply pipe with one actuator,
The opening and closing operation of the second hot water supply pipe is also performed to reduce the cost and size.
課題を解決するための手段 前記目的を達成するために本発明は、バーナと、この
バーナにより熱交換する熱交換器と、この熱交換器への
入水管と、前記熱交換器からの出湯管と、前記出湯管に
設けられた流量調節手段と、前記流量調節手段を駆動す
る駆動手段と、前記流量調節手段の出口側に設けられた
第１の給湯管及び第２の給湯管と、前記第２の給湯管を
開閉する開閉手段とからなり、前記流量調節手段は、前
記熱交換器からの出湯管が接続される１次圧力室と、前
記第１の給湯管及び第２の給湯管が設けられた２次圧力
室の間の連通部内を往復移動し、２箇所で流量調節する
流量調節弁と、前記流量調節手段が往移動時には前記開
閉手段を開状態で前記流量調節弁により前記第１の給湯
管及び第２の給湯管の流量調節を可能とし、前記流量調
節手段が復移動時には前記開閉手段を閉状態で前記流量
調節弁により前記第１の給湯管の流量調節を可能とした
ものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a burner, a heat exchanger for exchanging heat with the burner, a water inlet pipe to the heat exchanger, and a hot water pipe from the heat exchanger. A flow control means provided on the tapping pipe, a driving means for driving the flow control means, a first hot water supply pipe and a second hot water supply pipe provided on an outlet side of the flow control means, Opening / closing means for opening / closing a second hot water supply pipe, wherein the flow rate adjusting means is connected to a primary pressure chamber to which a hot water pipe from the heat exchanger is connected, and the first hot water supply pipe and the second hot water supply pipe A flow control valve that reciprocates in a communication portion between the secondary pressure chambers provided with the flow control valve and controls the flow rate at two locations; and the flow control valve is opened by the flow control valve when the flow control means moves forward. The flow rate of the first hot water pipe and the second hot water pipe can be adjusted, When the flow rate adjusting means moves backward, the flow rate of the first hot water supply pipe can be adjusted by the flow rate adjusting valve with the opening / closing means closed.
作用 本発明の給湯機は上記構成により、ワンアクチェータ
で、流量調節弁を往復移動することにより、第２の給湯
管を開状態で流量調節する動作と、第２の給湯管を閉の
状態で流量調節する動作を行なうものである。Operation With the above configuration, the water heater of the present invention is configured such that the flow control valve is reciprocated by one actuator to adjust the flow rate with the second hot water supply pipe opened, and that the second hot water supply pipe is closed. The operation for adjusting the flow rate is performed.
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。第１図、第２図において16は入水管であり、この入
水管16には水量センサ17が設けられている。前記入水管
16は熱交換器18に配管され前記熱交換器18からは出湯管
19が配接されている。この出湯管19には流量調節手段で
ある流量調節弁本体20が配設されている。前記流量調節
弁本体20からは第１の給湯管21と第２の給湯管22が分岐
され、前記第１の給湯管21の先端は蛇口23へ、前記第２
の給湯管22の先端は浴槽24へ配管されている。25はバイ
パス管であり入水管16と第１の給湯管21とを配接してい
る。尚、26は前記バイパス管25に設けられた流量スイッ
チであり、27は電磁弁である。28はバーナを示す。前記
流量調節弁20の構成を説明すると、29はバルブ本体であ
り、このバルブ本体29には前記出湯管19が接続される入
口30が設けられた１次圧力室31と、前記第１の給湯管21
を接続する第１の出口32、及び前記第２の給湯管22を接
続する第２の出口33が設けられた２次圧力室34が設けら
れている。Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, reference numeral 16 denotes a water inlet pipe, and the water inlet pipe 16 is provided with a water amount sensor 17. The inlet pipe
A pipe 16 is connected to a heat exchanger 18, and a tapping pipe is provided from the heat exchanger 18.
19 are connected. The tapping pipe 19 is provided with a flow control valve body 20 as flow control means. A first hot water supply pipe 21 and a second hot water supply pipe 22 are branched from the flow control valve main body 20, and the tip of the first hot water supply pipe 21 is connected to a faucet 23 by the second hot water supply pipe 21.
The tip of hot water supply pipe 22 is connected to bathtub 24. A bypass pipe 25 connects the water inlet pipe 16 and the first hot water supply pipe 21. Reference numeral 26 denotes a flow switch provided in the bypass pipe 25, and reference numeral 27 denotes an electromagnetic valve. 28 indicates a burner. The structure of the flow control valve 20 will be described. Reference numeral 29 denotes a valve main body. The valve main body 29 includes a primary pressure chamber 31 provided with an inlet 30 to which the tapping pipe 19 is connected, and a first hot water supply. Tube 21
, And a second pressure chamber 34 provided with a second outlet 33 connecting the second hot water supply pipe 22 is provided.
前記１次圧力室31と前記２次圧力室34は連通部35で連
通されている。前記連通部35の形状は前記１次圧力室31
から前記２次圧力室34に向って、縮小円錐流路36と円筒
流路37で構成されている。前記連通部35の内部には往復
移動し流量調節可能な流量調節手段である流量調節弁38
が設けられている。この流量調節弁38の形状は前記流量
調節弁38断面積が拡大する拡大部39と断面積が一定な円
筒部40で構成されている。前記流量調節弁38の２次圧力
室34側には弁軸41が設けられ、その先端には第２の給湯
管22側を開閉動作する開閉手段である弁42がスプリング
43で付勢されている。44は止め輪である。また前記流量
調節弁38の前記１次圧力室31側は、前記流量調節弁38と
一体に構成されＯリング45でシールされたピストン部46
が構成されている。このピストン部46により３次圧力室
47が設けられており、この３次圧力室47と前記２次圧力
室34とは連通孔48により連通されている。49は前記ピス
トン部46に直結された駆動軸でありこの駆動軸49の先端
にはギヤー50が設けられており前記ギヤー50は駆動手段
であるモータ51に連結されている。52は入水温サーミス
タ、53は出湯温サーミスタ、54は設定器を示す。The primary pressure chamber 31 and the secondary pressure chamber 34 are communicated by a communication part 35. The shape of the communication part 35 is the same as that of the primary pressure chamber 31.
, A reduced conical flow path 36 and a cylindrical flow path 37. Inside the communication part 35, a flow control valve 38 which is a flow control means which can reciprocate and adjust a flow rate.
Is provided. The shape of the flow control valve 38 is composed of an enlarged portion 39 in which the cross-sectional area of the flow control valve 38 increases and a cylindrical portion 40 having a constant cross-sectional area. A valve shaft 41 is provided on the side of the secondary pressure chamber 34 of the flow rate control valve 38, and a valve 42 serving as an opening / closing means for opening / closing the second hot water supply pipe 22 is provided at the tip thereof.
Powered by 43. 44 is a retaining ring. The primary pressure chamber 31 side of the flow control valve 38 is connected to a piston portion 46 integrally formed with the flow control valve 38 and sealed with an O-ring 45.
Is configured. The tertiary pressure chamber is formed by the piston 46.
A tertiary pressure chamber 47 and the secondary pressure chamber 34 are communicated by a communication hole 48. Reference numeral 49 denotes a drive shaft directly connected to the piston portion 46. A gear 50 is provided at the tip of the drive shaft 49, and the gear 50 is connected to a motor 51 which is a driving means. 52 denotes an incoming water temperature thermistor, 53 denotes an outgoing water temperature thermistor, and 54 denotes a setting device.
次に、この一実施例における動作を第１図、第２図に
おいて説明する。先ず浴槽24に給湯する際の動作を第１
図により説明すると、入水管16に入った水は流量センサ
17を通過し熱交換器18部でバーナ28の燃焼により湯に熱
交換され、流量調節弁本体20の流量調節弁38を通過し弁
42から第２の給湯管22を通って浴槽24へ給湯される。浴
槽24への給湯は、例えば45℃の湯張り動作時には、モー
タ51の動作により、流量調節弁38は図中右側に往移動
し、縮小円錐流路36と円筒部40の間隙を大きくし大量で
給湯することが出来る。この時、弁42は弁軸41に設けら
れた止め輪44のにより第２の出口33を開成している。ま
た例えば80℃前後の高温を浴槽24に給湯する際には前記
流量調節弁38は図中左側に復移動し、流量を減少する。
尚、この時にも弁24は開成状態にあり、出口33を開成し
ている。Next, the operation of this embodiment will be described with reference to FIGS. First, the operation when hot water is supplied to the bathtub 24 is the first.
Explaining with reference to the figure, water entering the inlet pipe 16 is a flow sensor
After passing through the heat exchanger 18, heat is exchanged into hot water by the combustion of the burner 28 in the heat exchanger 18, and passes through the flow control valve 38 of the flow control valve body 20,
Hot water is supplied from 42 to the bathtub 24 through the second hot water supply pipe 22. The hot water supply to the bathtub 24 is performed, for example, at the time of filling operation at 45 ° C., by the operation of the motor 51, the flow control valve 38 moves forward to the right side in the figure, and the gap between the reduced conical flow passage 36 and the cylindrical portion 40 is increased to increase the volume. Hot water can be supplied. At this time, the valve 42 has opened the second outlet 33 by the retaining ring 44 provided on the valve shaft 41. For example, when hot water of about 80 ° C. is supplied to the bathtub 24, the flow control valve 38 moves backward to the left in the figure to reduce the flow rate.
At this time, the valve 24 is in the open state, and the outlet 33 is open.
次に、蛇口23側から給湯する際の動作を第２図により
説明すると、流量調節弁38は図中左側に復移動し、弁42
が閉の状態で流量調節を行なう。今蛇口23が開の状態で
出湯温度が70℃前後の高温に設定された場合、円筒流路
37と拡大部39の間隙を狭くすることにより、流量を絞り
高温の給湯が出来る。一方例えば40℃前後の低温水を得
る際には、円筒流路37と拡大部39の間隙を広くすること
により、大流量出湯が可能となるものである。本実施例
において、第２の給湯管22からの給湯時に蛇口23が開成
された時の動作を説明すると、第２の給湯管22から風呂
に給湯されている時には、蛇口23を有する第１の給湯管
21からの給湯を優先するモードに設定器54により設定さ
れている。今、第２の給湯管22から風呂に給湯されてい
る時には、電磁弁27が開成状態にある。この状態で蛇口
23が成されると入水管16の水が蛇口23側に流れ流量スイ
ッチ26がオンとなる。流量スイッチ26がオンされると駆
動手段51が動作し、第２図のように開閉手段42を閉状態
とし、流量調節弁38で出湯管19の流量を制御するもので
ある。Next, the operation when hot water is supplied from the faucet 23 will be described with reference to FIG.
The flow rate is adjusted in a state where is closed. If the tap temperature is set to a high temperature of around 70 ° C with the faucet 23 open, the cylindrical flow path
By narrowing the gap between 37 and the enlarged portion 39, the flow rate can be reduced and hot water can be supplied at a high temperature. On the other hand, when obtaining low-temperature water of, for example, about 40 ° C., a large flow of hot water can be obtained by widening the gap between the cylindrical channel 37 and the enlarged portion 39. In the present embodiment, the operation when the faucet 23 is opened at the time of hot water supply from the second hot water supply pipe 22 will be described. When the hot water is supplied from the second hot water supply pipe 22 to the bath, the first having the faucet 23 is provided. Hot water pipe
The setting unit 54 sets the mode in which the hot water supply from 21 is given priority. Now, when hot water is supplied from the second hot water supply pipe 22 to the bath, the solenoid valve 27 is open. Faucet in this state
When the step 23 is performed, the water in the water inlet pipe 16 flows toward the faucet 23, and the flow switch 26 is turned on. When the flow switch 26 is turned on, the driving means 51 operates to close the opening / closing means 42 as shown in FIG. 2, and the flow control valve 38 controls the flow rate of the tapping pipe 19.
本実施例においては、第１の給湯管を蛇口に、第２の
給湯管を浴槽に配接することにより、各々の給湯時に流
量制御が出来ると共に、弁42の動作が除動であるため、
前記弁42の開閉時にウォータハンマ等の発生がなく使い
勝手、信頼性に優れる。In this embodiment, since the first hot water supply pipe is connected to the faucet and the second hot water supply pipe is connected to the bathtub, the flow rate can be controlled at each hot water supply, and the operation of the valve 42 is deactivated.
When the valve 42 is opened and closed, there is no occurrence of water hammer or the like, and it is excellent in usability and reliability.
発明の効果 以上の様に本発明は、バーナと、このバーナにより熱
交換する熱交換器と、この熱交換器への入水管と、前記
熱交換器からの出湯管と、前記出湯管に設けられた流量
調節手段と、前記流量調節手段を駆動する駆動手段と、
前記流量調節手段の出口側に設けられた第１の給湯管及
び第２の給湯管と、前記第２の給湯管を開閉する開閉手
段とからなり、前記流量調節手段は、前記熱交換器から
の出湯管が接続される１次圧力室と前記第１の給湯管及
び第２の給湯管が設けられた２次圧力室の間の連通部内
を往復移動し、２箇所で流量調節する流量調節弁と、前
記流量調節手段が往移動時には前記開閉手段を開状態で
前記流量調節弁で前記第１の給湯管及び第２の給湯管の
流量調節を可能とし、前記流量調節手段が復移動時には
前記開閉手段を閉状態で前記流量調節弁で前記第１の給
湯管の流量調節を可能としたものであり、出湯管からの
湯を２方向に切換えると共に、この２方向それぞれ単独
使用時に、１つのアクチュエータで流量調節を行うこと
が可能となる。また１つのアクチュエータであるため低
コスト化が図れる。また前記２つの機能を複合化するこ
とにより小型コンパクト化が図れ、機器への実装が極め
て容易となる効果がある。Effects of the Invention As described above, the present invention provides a burner, a heat exchanger for exchanging heat with the burner, a water inlet pipe to the heat exchanger, a hot water pipe from the heat exchanger, and the hot water pipe. Flow control means, a driving means for driving the flow control means,
It comprises a first hot water supply pipe and a second hot water supply pipe provided on the outlet side of the flow rate adjusting means, and an opening / closing means for opening and closing the second hot water supply pipe, and the flow rate adjusting means is provided from the heat exchanger. Flow control for reciprocating in a communication portion between a primary pressure chamber to which a hot water supply pipe is connected and a secondary pressure chamber provided with the first hot water supply pipe and the second hot water supply pipe, thereby controlling a flow rate at two locations. A valve and the flow rate adjusting means allow the flow rate adjusting valve to adjust the flow rate of the first hot water supply pipe and the second hot water supply pipe with the opening / closing means open when the flow rate adjusting means moves forward, and when the flow rate adjusting means moves backward. When the opening / closing means is closed, the flow rate of the first hot water supply pipe can be adjusted by the flow rate control valve. The hot water from the hot water supply pipe is switched in two directions. The flow rate can be adjusted with one actuator. In addition, the cost can be reduced because only one actuator is used. In addition, by combining the above two functions, it is possible to achieve downsizing and compactness, and it is extremely easy to mount the apparatus.
第１図、第２図は本発明の一実施例を示す給湯機のシス
テム回路図、第３図は従来例を示す給湯機のシステム回
路図である。 16……入水管、18……熱交換器、19……出湯管、20……
流量調節手段、21……第１の給湯管、22……第２の給湯
管、28……バーナ、31……１次圧力室、34……２次圧力
室、38……流量調節弁、42……開閉手段（弁）。1 and 2 are system circuit diagrams of a water heater showing an embodiment of the present invention, and FIG. 3 is a system circuit diagram of a water heater showing a conventional example. 16 ... Inlet pipe, 18 ... Heat exchanger, 19 ... Outlet pipe, 20 ...
Flow control means, 21 first hot water supply pipe, 22 second water supply pipe, 28 burner, 31 primary pressure chamber, 34 secondary pressure chamber, 38 flow control valve 42 ... Opening / closing means (valve).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 伊藤 孝二 大阪府門真市大字門真1006番地 松下電 器産業株式会社内 (56)参考文献 特開 昭62−172151（ＪＰ，Ａ) 特開 昭59−97449（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continued on the front page (72) Koji Ito, Inventor 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-62-172151 (JP, A) JP-A-59- 97449 (JP, A)
Claims (2)
交換器と、この熱交換器への入水管と、前記熱交換器か
らの出湯管と、前記出湯管に設けられた流量調節手段
と、前記流量調節手段を駆動する駆動手段と、前記流量
調節手段の出口側に設けられた第１の給湯管及び第２の
給湯管と、前記第２の給湯管を開閉する開閉手段とから
なり、前記流量調節手段は、前記熱交換器からの出湯管
が接続される１次圧力室と、前記第１の給湯管及び第２
の給湯管が設けられた２次圧力室の間の連通部内を往復
移動し、２箇所で流量調節する流量調節弁と、前記流量
調節手段が往移動時には前記開閉手段を開状態で前記流
量調節弁により前記第１の給湯管及び第２の給湯管の流
量調節を可能とし、前記流量調節手段が復移動時には前
記開閉手段を閉状態で前記流量調節弁により前記第１の
給湯管の流量調節を可能とした給湯機。1. A burner, a heat exchanger for exchanging heat by the burner, a water inlet pipe to the heat exchanger, a hot water pipe from the heat exchanger, and a flow control means provided on the hot water pipe. Driving means for driving the flow rate adjusting means, first and second hot water supply pipes provided on the outlet side of the flow rate adjusting means, and opening and closing means for opening and closing the second hot water supply pipe. A first pressure chamber to which a tapping pipe from the heat exchanger is connected, the first hot water supply pipe and a second pressure supply pipe;
A flow control valve for reciprocating in a communicating portion between the secondary pressure chambers provided with the hot water supply pipes and controlling flow at two locations, and the flow control with the opening and closing means open when the flow control means moves forward. The flow rate of the first hot water pipe and the second hot water pipe can be adjusted by a valve, and when the flow rate adjusting means moves backward, the opening / closing means is closed and the flow rate of the first hot water pipe is adjusted by the flow rate adjusting valve. Water heater that made it possible.
給湯管を浴槽に配接した特許請求の範囲第１項記載の給
湯機。2. The water heater according to claim 1, wherein the first hot water supply pipe is connected to a hot water supply faucet and the second hot water supply pipe is connected to a bathtub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1320007A JP2730230B2 (en) | 1989-12-08 | 1989-12-08 | Water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1320007A JP2730230B2 (en) | 1989-12-08 | 1989-12-08 | Water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03181744A JPH03181744A (en) | 1991-08-07 |
| JP2730230B2 true JP2730230B2 (en) | 1998-03-25 |
Family
ID=18116710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1320007A Expired - Fee Related JP2730230B2 (en) | 1989-12-08 | 1989-12-08 | Water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730230B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5997449A (en) * | 1982-11-25 | 1984-06-05 | Matsushita Electric Ind Co Ltd | Heating control device |
| JPS62172151A (en) * | 1986-01-23 | 1987-07-29 | Matsushita Electric Ind Co Ltd | Hot-water supplier |
-
1989
- 1989-12-08 JP JP1320007A patent/JP2730230B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03181744A (en) | 1991-08-07 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |