JPH0510583A - Hot water supplying apparatus for bath - Google Patents
Hot water supplying apparatus for bathInfo
- Publication number
- JPH0510583A JPH0510583A JP3190814A JP19081491A JPH0510583A JP H0510583 A JPH0510583 A JP H0510583A JP 3190814 A JP3190814 A JP 3190814A JP 19081491 A JP19081491 A JP 19081491A JP H0510583 A JPH0510583 A JP H0510583A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- bathtub
- temperature
- water supply
- amount
- 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
Landscapes
- Control For Baths (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、風呂用給湯装置に関
し、詳しくは、浴槽の排水栓が十分に閉栓されていない
場合にこれを検出することが可能な風呂用給湯装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply device for baths, and more particularly to a hot water supply device for baths that can detect when the drain plug of a bathtub is not sufficiently closed.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】従来の
風呂用給湯装置としては、例えば、浴槽に給湯する場合
に、給湯器に設けた水量センサなどにより、給湯器から
浴槽に供給された給湯量を測定し、給湯量が所定の量に
なると、給湯を停止するようにしたものがある。2. Description of the Related Art As a conventional hot water supply device for a bath, for example, when hot water is supplied to a bathtub, hot water supplied from the water supply device to the bathtub by a water amount sensor provided in the water heater. There is a device which measures the amount of hot water and stops hot water supply when the amount of hot water supply reaches a predetermined amount.
【０００３】また、従来の他の風呂用給湯装置には、浴
槽内の水位を測定し、所定の水位に達すると給湯器から
浴槽への給湯を停止するようにしたものがある。Another conventional hot water supply device for baths is one which measures the water level in the bathtub and stops hot water supply from the water heater to the bathtub when a predetermined water level is reached.
【０００４】しかし、上記従来例の風呂用給湯装置のう
ち、前者においては、給湯器に設けられた水量センサに
より測定される給湯量が所定の量になると、浴槽の水位
に無関係に給湯が停止されるため、排水栓が十分に閉栓
されていない場合、入浴しようとしたときに、浴槽内に
湯が全くなかったり、入浴することができるだけの水位
まで湯が張られていなかったりするというような問題点
がある。However, of the above-mentioned conventional bath water heaters, in the former case, when the amount of hot water measured by the water amount sensor provided in the water heater reaches a predetermined amount, the hot water supply is stopped regardless of the water level in the bathtub. Therefore, if the drain plug is not sufficiently closed, when you try to bathe, there is no hot water in the bathtub, or there is no hot water level enough to bathe. There is a problem.
【０００５】また、後者の従来例においては、所定の水
位に達するまで、給湯を継続するので、排水栓が十分に
閉栓されていない場合、排水栓から湯が漏れて水位が上
昇しないため、いつまでも給湯器からの給湯が行なわ
れ、湯が無駄になるばかりでなく、給湯器が長時間連続
して稼働するため、過熱して危険が生じるというような
問題点がある。In the latter conventional example, the hot water is supplied until the water level reaches a predetermined level. Therefore, if the drain plug is not closed sufficiently, the hot water leaks from the drain plug and the water level does not rise. Hot water is supplied from the water heater, and the hot water is not only wasted, but there is also a problem in that the water heater operates continuously for a long time, causing overheating and danger.
【０００６】この発明は、上記のような問題点を解決す
るものであり、浴槽の排水栓が十分に閉栓されていない
場合に、これを速やかに検出し、給湯器から浴槽への給
湯を確実に停止することが可能な風呂用給湯装置を提供
することを目的とする。The present invention solves the above-mentioned problems, and when the drain plug of the bathtub is not sufficiently closed, it is promptly detected to ensure the hot water supply from the water heater to the bathtub. It is an object of the present invention to provide a hot water supply device for a bath that can be stopped at any time.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、この発明の風呂用給湯装置は、浴槽に湯を供給する
給湯器と、該浴槽内の、底部より所定の距離だけ高い位
置に、給湯器から供給される湯が直接あたらないように
配設された温度センサと、給湯器から浴槽への給湯量を
検出する水量センサと、排水栓からの漏水がないときに
浴槽内の水位が前記温度センサの高さに達する量Ｑの給
湯を行った時点で、前記温度センサにより検出される温
度Ｔ2と給湯開始前の浴槽内の温度Ｔ1との温度差ΔＴ
が、所定の値より小さい場合に、浴槽の排水栓が十分に
閉栓されていないものと判断してその旨を報知するとと
もに、給湯器から浴槽への給湯を停止する給湯制御手段
とを具備することを特徴とする。In order to achieve the above object, a bath water heater according to the present invention is provided with a water heater for supplying hot water to a bath and a position higher than a bottom by a predetermined distance in the bath. , A temperature sensor arranged so that the hot water supplied from the water heater does not hit directly, a water amount sensor that detects the amount of hot water supplied from the water heater to the bathtub, and the water level in the bathtub when there is no water leakage from the drain tap When the hot water is supplied by the amount Q that reaches the height of the temperature sensor, the temperature difference ΔT between the temperature T 2 detected by the temperature sensor and the temperature T 1 in the bathtub before the hot water starts.
When it is smaller than a predetermined value, it is determined that the drain plug of the bathtub is not sufficiently closed, and the fact is notified, and there is provided hot water control means for stopping hot water supply from the water heater to the bathtub. It is characterized by
【０００８】[0008]
【作用】給湯開始前に温度センサにより浴槽内の温度Ｔ
1を検出した後、給湯を開始し、排水栓からの漏水がな
いときに、浴槽内の水位が温度センサの高さに達するだ
けの量Ｑの給湯を行った時点で、温度センサが、その位
置の温度Ｔ2を検出する。このとき、浴槽の排水栓が十
分に閉栓された状態で給湯されていれば、浴槽内の水位
は温度センサが配設された位置（高さ）にまで達し、温
度センサは湯温（給湯開始前の浴槽内の雰囲気温度Ｔ1
より温度が高い）を検出するため、Ｔ2とＴ1との温度差
ΔＴ（＝Ｔ2−Ｔ1）が大きくなる。一方、浴槽の排水栓
が十分に閉栓さていない場合、給湯量がＱに達しても、
浴槽内の水位は温度センサが配設された位置にまで達し
ないため、温度センサはＴ2として低い温度を検出し、
Ｔ2とＴ 1との温度差ΔＴは小さくなる。[Function] The temperature T in the bathtub is measured by the temperature sensor before the hot water supply is started.
1Hot water supply is started, and no water leaks from the drain tap.
When the water level in the bathtub reaches the height of the temperature sensor
At the time of hot water supply of the amount of injury Q, the temperature sensor
Temperature T2To detect. At this time, the drain plug of the bathtub should be sufficient.
The water level in the bathtub if the hot water is supplied while
Reaches the position (height) where the temperature sensor is installed,
Degree sensor is hot water temperature (ambient temperature T in the bathtub before hot water starts1
(Temperature higher)2And T1Temperature difference from
ΔT (= T2-T1) Becomes larger. On the other hand, a bathtub drain plug
If the amount of hot water supply reaches Q,
The water level in the bathtub reaches the position where the temperature sensor is installed.
Since there is no temperature sensor,2Detect low temperature as
T2And T The temperature difference ΔT from 1 becomes smaller.
【０００９】そこで、ΔＴが所定の値より大きい場合に
は、排水栓からの漏水がないものと判断して給湯を継続
し、一方、ΔＴが所定の値より小さいときには、浴槽の
排水栓が十分に閉栓されていないと判断してその旨を報
知し、排水栓を十分に閉栓するように促すとともに、給
湯器から浴槽への給湯を停止することにより、湯のロス
を防止する。Therefore, when ΔT is larger than a predetermined value, it is determined that there is no water leakage from the drain plug, and hot water supply is continued. On the other hand, when ΔT is smaller than the predetermined value, the drain plug of the bathtub is sufficient. It is determined that the plug is not closed, and the fact is notified, and the drain plug is urged to be closed sufficiently, and the loss of hot water is prevented by stopping the hot water supply from the water heater to the bathtub.
【００１０】[0010]
【実施例】以下、この発明の実施例を図に基づいて説明
する。図１は、この発明の風呂用給湯装置の概要を示す
図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an outline of a hot water supply device for bath according to the present invention.
【００１１】図に示すように、この発明の風呂用給湯装
置は、浴槽１に湯を供給する給湯器２と、浴槽１内の、
底部より所定の距離Ｈだけ高い位置に、給湯器２から供
給される湯が直接あたらないように風呂アダプタ７内に
配設された温度センサ（この実施例ではサーミスタであ
るがこれに限られるものではない）３と、給湯器２から
浴槽１への給湯量を検出する水量センサ４と、給湯器２
から浴槽１への給湯を制御する給湯制御手段５とを備え
ている。As shown in the figure, the hot water supply device for a bath according to the present invention includes a hot water supply device 2 for supplying hot water to a bath tub 1, and a hot water supply device inside the bath tub 1.
A temperature sensor arranged in the bath adapter 7 at a position higher than the bottom by a predetermined distance H so as not to directly hit the hot water supplied from the water heater 2 (a thermistor in this embodiment, but not limited to this). 3), a water amount sensor 4 for detecting the amount of hot water supplied from the water heater 2 to the bathtub 1, and the water heater 2
A hot water supply control means 5 for controlling hot water supply from the hot water to the bathtub 1 is provided.
【００１２】この給湯制御手段５は、給湯器２から浴槽
１への給湯を制御するものであり、排水栓６からの漏水
がなければ浴槽１内の水位が温度センサ３の高さに達す
るだけの量Ｑの給湯を行った時点（水量センサ４により
検出）で、温度センサ３により検出される温度Ｔ2と給
湯開始前のその位置の温度Ｔ1との温度差ΔＴが所定の
値より小さい場合に、浴槽１の排水栓６が十分に閉栓さ
れていないものと判断してその旨を報知するとともに、
給湯器２から浴槽１への給湯を停止するものである。This hot water supply control means 5 controls the hot water supply from the water heater 2 to the bathtub 1, and if there is no water leakage from the drain plug 6, the water level in the bathtub 1 will reach the height of the temperature sensor 3. At the time when hot water is supplied by the amount Q (detected by the water amount sensor 4), the temperature difference ΔT between the temperature T 2 detected by the temperature sensor 3 and the temperature T 1 at that position before the start of hot water supply is smaller than a predetermined value. In this case, it is determined that the drain plug 6 of the bathtub 1 is not sufficiently closed, and the fact is notified, and
Hot water supply from the water heater 2 to the bathtub 1 is stopped.
【００１３】なお、温度センサ３は、給湯される湯が直
接あたると、浴槽１内の水位が温度センサ３の高さまで
達していない場合にも、高い温度（湯温）を検出してし
まうため、給湯される湯が直接あたらないような態様で
浴槽１内に配設することが必要である。但し、その具体
的な態様については特に制約はなく、公知の種々の構造
や態様を任意に適用することが可能である。Note that the temperature sensor 3 detects a high temperature (hot water temperature) even when the water level in the bathtub 1 does not reach the height of the temperature sensor 3 when the hot water supplied directly hits the temperature sensor 3. It is necessary to dispose the hot water in the bathtub 1 in such a manner that the hot water is not directly applied. However, there is no particular limitation on the specific mode, and various known structures and modes can be arbitrarily applied.
【００１４】次に、上記風呂用給湯装置の動作を、図２
の線図及び図３のフローチャートを参照しつつ説明す
る。Next, referring to FIG.
This will be described with reference to the diagram of FIG.
【００１５】この実施例の風呂用給湯装置により、浴槽
１に湯を供給する場合、給湯開始前に、温度センサ３を
配設した位置の温度Ｔ1を測定する（ステップ１）。こ
のとき、浴槽１にはまだ給湯されていないので、温度セ
ンサ３が浴室の温度（室温）をＴ1として検出する。そ
の後、給湯が開始され（ステップ２）、水量センサ４が
浴槽１への給湯量を検出し、その給湯量が上記の所定量
Ｑになったかどうかを判断する（ステップ３）。そし
て、給湯量がＱになった時点で、温度センサ３により該
温度センサ３が配設された位置の温度Ｔ2を測定し（ス
テップ４）、このときの温度Ｔ2と給湯開始前の温度Ｔ1
との温度差ΔＴ（＝Ｔ2−Ｔ1）を求める（ステップ
５）。そして、ΔＴが所定の値より大きいか否かを判断
し（ステップ６）、ΔＴが所定の値より小さい場合に
は、浴槽１の水位が温度センサ３が配設された位置にま
で達していない、すなわち、排水栓６が十分に閉栓され
ていないため、排水栓から漏水しているものと判断し
て、警報（ブザー）を発してその旨を報知するととも
に、浴槽１への給湯を停止する（ステップ７）。When hot water is supplied to the bathtub 1 by the hot water supply device for a bath of this embodiment, the temperature T 1 at the position where the temperature sensor 3 is arranged is measured before starting hot water supply (step 1). At this time, since the bathtub 1 has not yet been supplied with hot water, the temperature sensor 3 detects the temperature (room temperature) of the bathroom as T 1 . After that, hot water supply is started (step 2), the water amount sensor 4 detects the amount of hot water supplied to the bathtub 1, and it is determined whether or not the amount of hot water supply has reached the predetermined amount Q (step 3). Then, when the amount of hot water supply reaches Q, the temperature T 2 at the position where the temperature sensor 3 is arranged is measured by the temperature sensor 3 (step 4), and the temperature T 2 at this time and the temperature before the start of hot water supply are measured. T 1
And a temperature difference ΔT (= T 2 −T 1 ) from the temperature difference are calculated (step 5). Then, it is judged whether or not ΔT is larger than a predetermined value (step 6), and when ΔT is smaller than the predetermined value, the water level of the bathtub 1 has not reached the position where the temperature sensor 3 is arranged. That is, since the drain plug 6 is not sufficiently closed, it is determined that water is leaking from the drain plug, and an alarm (buzzer) is issued to notify that effect, and hot water supply to the bathtub 1 is stopped. (Step 7).
【００１６】一方、給湯量がＱになった時点で、温度差
ΔＴ（＝Ｔ2−Ｔ1）が所定の値より大きい、すなわち、
Ｔ2がＴ1より相当に高い温度になっている場合には、水
位が温度センサ３に達するまで上昇しているのであるか
ら、排水栓６が十分に閉栓され、給湯中の漏水がないも
のと判断して給湯を継続し（ステップ８）、その後、入
浴に適した量ＱLまで給湯したか否かを判断し（ステッ
プ９）、ＱLまで給湯した時点で給湯を停止する（ステ
ップ１０）。On the other hand, when the hot water supply amount becomes Q, the temperature difference ΔT (= T 2 −T 1 ) is larger than a predetermined value, that is,
When the temperature of T 2 is considerably higher than that of T 1 , the water level rises until it reaches the temperature sensor 3, so the drain plug 6 is fully closed and there is no water leakage during hot water supply. it is determined that continuing the hot water supply (step 8), then, to an amount Q L suitable for bathing determines whether the hot water supply (step 9), to stop the hot water at the time of the hot water to Q L (step 10 ).
【００１７】上記のように構成されたこの実施例の風呂
用給湯装置においては、所定の給湯量Ｑになった時点
で、温度センサ３により検出される温度Ｔ2と給湯開始
前の温度Ｔ1との温度差ΔＴにより、排水栓６が十分に
閉栓されているか否かを確実に検知することができるた
め、排水栓６が十分に閉栓されていない場合、これを検
知し、その旨を報知して、排水栓６を十分に閉栓するよ
うに促すことができるとともに、給湯器２から浴槽１へ
の給湯を停止して、排水栓６からの漏水による湯のロス
を防止することができる。In the hot water supply device for a bath of this embodiment constructed as described above, when the predetermined hot water supply amount Q is reached, the temperature T 2 detected by the temperature sensor 3 and the temperature T 1 before the start of hot water supply are set. Since it is possible to reliably detect whether or not the drain plug 6 is sufficiently closed by the temperature difference ΔT from the temperature difference with the temperature difference ΔT, when the drain plug 6 is not sufficiently closed, this is detected and a notification is given to that effect. Thus, it is possible to promptly close the drain plug 6 sufficiently, and to stop hot water supply from the water heater 2 to the bathtub 1 to prevent loss of hot water due to water leakage from the drain plug 6.
【００１８】なお、この発明において、排水栓が十分に
閉栓されていない旨を報知する方法としては、ブザーな
どの聴覚に訴えるもの、あるいはランプなどの視覚に訴
えるもの、あるいはそれらの組合せなど、種々の報知手
段を用いることが可能である。また、警報の発生と給湯
の停止は同時に行なってもよく、また、警報の発生また
は給湯の停止のいずれか一方を先行させるように構成し
てもよい。In the present invention, various methods, such as a buzzer or a visual aid such as a lamp, or a combination thereof, may be used as a method of notifying that the drain plug is not sufficiently closed. It is possible to use the notification means of. Further, the alarm may be issued and the hot water supply may be stopped at the same time, or either the alarm may be issued or the hot water supply may be stopped.
【００１９】また、上述の給湯量Ｑ（排水栓６からの漏
水がなければ浴槽１内の水位が温度センサ３の高さにま
で達するだけの給湯量）は、浴槽１の寸法から算出し
て、これをあらかじめ水量センサ４に記憶させておくこ
とも可能であり、また、排水栓６からの漏水がない状態
で、水位が温度センサ３の高さに達するまで実際に給湯
して、そのときの給湯量Ｑを水量センサ４に記憶させる
ことも可能である。The above-mentioned hot water supply amount Q (the amount of hot water supply enough for the water level in the bathtub 1 to reach the height of the temperature sensor 3 if there is no water leakage from the drain plug 6) is calculated from the dimensions of the bathtub 1. It is also possible to store this in the water amount sensor 4 in advance, and when there is no water leakage from the drain plug 6, water is actually supplied until the water level reaches the height of the temperature sensor 3, and at that time It is also possible to store the hot water supply amount Q in the water amount sensor 4.
【００２０】さらに、所定の給湯量Ｑになった時点で、
排水栓６が十分に閉栓されているか否かを判定するため
の、給湯前の温度Ｔ1と給湯量がＱになった時点におけ
る温度Ｔ2との温度差ΔＴの所定値については、浴室内
の雰囲気温度、供給される湯の温度、供給速度などを考
慮して適正な値を設定することが好ましい。Further, when the predetermined hot water supply amount Q is reached,
Regarding the predetermined value of the temperature difference ΔT between the temperature T 1 before hot water supply and the temperature T 2 at the time when the amount of hot water supply reaches Q, which is for determining whether or not the drain plug 6 is sufficiently closed, It is preferable to set an appropriate value in consideration of the ambient temperature, the temperature of the hot water supplied, the supply speed, and the like.
【００２１】[0021]
【発明の効果】上述のように、この発明の風呂用給湯装
置は、浴槽内の所定の位置に温度センサを設けて、所定
量Ｑの湯を供給したときに、該温度センサによりその位
置の温度Ｔ2を検出することにより、そのときの温度Ｔ2
と給湯前の温度Ｔ1との温度差ΔＴから排水栓が十分に
閉栓されているかどうかを判断するようにしているの
で、排水栓が十分に閉栓されていない場合、これを確実
に検知して、その旨を報知し、排水栓を十分に閉栓する
ように促すとともに、給湯器から浴槽への給湯を停止し
て、給湯器の過熱や湯のロスを防止することができる。As described above, the bath water heater according to the present invention is provided with a temperature sensor at a predetermined position in the bathtub, and when a predetermined amount Q of hot water is supplied, the temperature sensor detects the position. by detecting the temperature T 2, temperature T 2 at that time
The temperature difference ΔT between the hot water and the temperature T 1 before hot water supply is used to determine whether the drain plug is sufficiently closed. Therefore, if the drain plug is not fully closed, this should be reliably detected. It is possible to notify that fact, prompt the user to sufficiently close the drain plug, and stop hot water supply from the water heater to the bathtub to prevent overheating of the water heater and loss of hot water.
【図１】この発明の一実施例にかかる風呂用給湯装置を
示す図である。FIG. 1 is a diagram showing a hot water supply device for a bath according to an embodiment of the present invention.
【図２】この発明の一実施例にかかる風呂用給湯装置の
給湯量と検出温度との関係を示す線図である。FIG. 2 is a diagram showing a relationship between a hot water supply amount and a detected temperature of the hot water supply device for a bath according to the embodiment of the present invention.
【図３】この発明の一実施例にかかる風呂用給湯装置の
動作を説明するためのフローチャートである。FIG. 3 is a flowchart for explaining the operation of the bath water heater according to the embodiment of the present invention.
１ 浴槽 ２ 給湯器 ３ 温度センサ ４ 水量センサ ５ 給湯制御手段 ６ 排水栓 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Water heater 3 Temperature sensor 4 Water amount sensor 5 Hot water supply control means 6 Drain plug
Claims (1)
の、底部より所定の距離だけ高い位置に、給湯器から供
給される湯が直接あたらないように配設された温度セン
サと、給湯器から浴槽への給湯量を検出する水量センサ
と、排水栓からの漏水がないときに浴槽内の水位が前記
温度センサの高さに達する量Ｑの給湯を行った時点で、
前記温度センサにより検出される温度Ｔ2と給湯開始前
の浴槽内の温度Ｔ1との温度差ΔＴが、所定の値より小
さい場合に、浴槽の排水栓が十分に閉栓されていないも
のと判断してその旨を報知するとともに、給湯器から浴
槽への給湯を停止する給湯制御手段とを具備することを
特徴とする風呂用給湯装置。Claim: What is claimed is: 1. A water heater for supplying hot water to a bathtub, and a hot water supply device arranged in the bathtub at a position higher than the bottom by a predetermined distance so that the hot water supplied from the water heater does not directly hit the bathtub. A temperature sensor is installed, a water amount sensor that detects the amount of hot water supplied from the water heater to the bathtub, and hot water is supplied in an amount Q such that the water level in the bathtub reaches the height of the temperature sensor when there is no water leakage from the drain tap. At the time
When the temperature difference ΔT between the temperature T 2 detected by the temperature sensor and the temperature T 1 in the bathtub before starting hot water supply is smaller than a predetermined value, it is determined that the drain plug of the bathtub is not sufficiently closed. A hot water supply device for a bath, comprising: hot water supply control means for stopping the hot water supply from the hot water supply device to the bathtub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3190814A JPH0816546B2 (en) | 1991-07-04 | 1991-07-04 | Bath water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3190814A JPH0816546B2 (en) | 1991-07-04 | 1991-07-04 | Bath water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0510583A true JPH0510583A (en) | 1993-01-19 |
| JPH0816546B2 JPH0816546B2 (en) | 1996-02-21 |
Family
ID=16264198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3190814A Expired - Lifetime JPH0816546B2 (en) | 1991-07-04 | 1991-07-04 | Bath water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816546B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11257729A (en) * | 1998-03-10 | 1999-09-24 | Matsushita Electric Ind Co Ltd | Bath device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165461A (en) * | 1984-02-08 | 1985-08-28 | Osaka Gas Co Ltd | Detection of hot-water level in bathtub |
| JPH01175259U (en) * | 1988-05-31 | 1989-12-13 |
-
1991
- 1991-07-04 JP JP3190814A patent/JPH0816546B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60165461A (en) * | 1984-02-08 | 1985-08-28 | Osaka Gas Co Ltd | Detection of hot-water level in bathtub |
| JPH01175259U (en) * | 1988-05-31 | 1989-12-13 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11257729A (en) * | 1998-03-10 | 1999-09-24 | Matsushita Electric Ind Co Ltd | Bath device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0816546B2 (en) | 1996-02-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960820 |