JP4131198B2

JP4131198B2 - Antifouling device for inner wall of bathtub

Info

Publication number: JP4131198B2
Application number: JP2003149790A
Authority: JP
Inventors: 俊之柿木
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2003-05-27
Filing date: 2003-05-27
Publication date: 2008-08-13
Anticipated expiration: 2023-05-27
Also published as: JP2004350783A

Description

【０００１】
【発明の属する技術分野】
本発明は、浴槽の内壁面に垢等の汚れが付着して汚れるのを防止する浴槽の内壁面の防汚装置に関するものである。
【０００２】
【従来の技術】
一般に浴槽では内壁面の喫水線より上の位置に垢等の汚れが乾いて付き易いが、これを防止するため近年、浴槽の上部に噴射ノズルを設け、湯または水を噴射ノズルから噴射して浴槽の内壁面に沿って湯または水を流して内壁面に垢等の汚れが付着するのを防止するようした防汚装置（例えば、特許文献１参照）が提供されている。
【０００３】
【特許文献１】
特開平６−３０４０８５号公報
【０００４】
【発明が解決しようとする課題】
ところで、上記従来例では、噴射ノズルから湯または水を噴射するために浴湯や市水を循環ポンプで噴射ノズルに供給するようになっており、噴射ノズルから湯または水を噴射して浴槽の内壁面の防汚をするためには特別にそのため専用の循環ポンプを設置しなければならなく、コストアップになると共に循環ポンプの設置に場所をとるという問題がある。
【０００５】
また上記従来例では噴射ノズルから湯または水を流して防汚するとき、浴槽の水位に関係なく常に一定の状態で湯または水を流しており、汚れの状態に応じて適切に湯または水を流すことができるものでない。つまり、汚れてないのにも湯または水を余分に流したりしてエネルギー的に無駄になるものである。
【０００６】
本発明は上記の点に鑑みてなされたものであり、浴槽の内壁面に沿って湯を流して内壁面の防汚ができるのは勿論、給湯器の保温用循環ポンプを用いることにより特別に循環ポンプを設置しなくても湯を供給できてコスト的に安価にできると共に設置に場所をとらなく、さらに適切に湯を流して省エネルギー化を図ることができる浴槽の内壁面の防汚装置を提供することを課題とするものである。
【０００７】
【課題を解決するための手段】
上記課題を解決するため本発明の浴槽の内壁面の防汚装置は、所定の間隔で浴槽１の上部の噴射ノズル２から噴射した湯を浴槽１の内壁面３に沿って流すことで浴槽１の内壁面３の防汚をする浴槽の内壁面の防汚装置において、浴槽１内の湯を保温するための給湯器４の保温循環路５から分岐して噴射ノズル２に湯を供給するようにし、噴射ノズルから湯を流す頻度を浴室内温度、湿度により変更するように制御したことを特徴とする。
【０００８】
上記のように噴射ノズル２から噴射した湯を浴槽１の内壁面３に沿って流すことで垢等の汚れが乾いて付き易い内壁面３の喫水線より上の位置を乾かないようにして汚れが付きにくいようにできる。しかも給湯器４の保温循環路５から分岐して噴射ノズル２に湯を供給するために給湯器４の保温用循環ポンプにて湯を噴射ノズル２に供給でき、従来のように防汚のために特別に循環ポンプを要せず、コスト的に安価にできると共に設置に場所をとらないようにできる。そして、浴室内の温度が高い場合は、浴槽１の内壁面３が乾きやすいために湯を噴射ノズル２から噴射する頻度を多くし、浴室内の湿度が高い場合、内壁面３が乾きにくくなるため湯を噴射ノズル２から噴射する頻度を少なくすることにより、浴室内の条件に応じて適切な頻度で湯を内壁面３に流すことができ、省エネルギー運転ができる。
【００１１】
また、所定の間隔で浴槽１の上部の噴射ノズル２から噴射した湯を浴槽１の内壁面３に沿って流すことで浴槽１の内壁面３の防汚をする浴槽の内壁面の防汚装置において、浴槽１内の湯を保温するための給湯器４の保温循環路５から分岐して噴射ノズル２に湯を供給するようにし、浴槽１を風呂蓋で蓋したとき風呂蓋を検知して噴射ノズル２から湯を流す頻度を大幅に少なくするように制御したことを特徴とするものである。噴射ノズル２から噴射した湯を浴槽１の内壁面３に沿って流すことで垢等の汚れが乾いて付き易い内壁面３の喫水線より上の位置を乾かないようにして汚れが付きにくいようにできる。しかも給湯器４の保温循環路５から分岐して噴射ノズル２に湯を供給するために給湯器４の保温用循環ポンプにて湯を噴射ノズル２に供給でき、従来のように防汚のために特別に循環ポンプを要せず、コスト的に安価にできると共に設置に場所をとらないようにできる。そして、風呂蓋６で蓋したときは浴槽１の内壁面３が乾きにくくなるため、噴射ノズル２から流す湯を大幅に少なくでき、省エネルギー運転ができる。
【００１２】
また入浴者が浴槽１から出たときの浴湯の水位変化を検知したとき噴射ノズル２から湯を流すように制御したことを特徴とすることも好ましい。入浴者が浴槽１から出るときに浴湯の水位が下がって内壁面３に付きやすくなった汚れを直ぐに湯で洗い落とすことにより汚れが付きにくくなる。
【００１３】
また浴槽１の浴湯の排水時の水位変化を検知したとき噴射ノズル２から湯を流すように制御したことを特徴とすることも好ましい。浴槽１の浴湯の排水時に特に随時湯を流すことにより喫水線で取り残されている汚れを落として行くことにより、汚れが付きにくくなる。
【００１５】
【発明の実施の形態】
図１に示すように浴槽１は側壁１ａの上端の周囲に外方に突出するフランジ１ｂを有し、側壁１ａの上端には湯を噴射するための噴射ノズル２を適当な間隔て複数個並設してある。給湯器４は浴室外に設置してあり、給湯器４に給水された水を加熱することにより湯を沸かして給湯したり、浴槽１から戻した湯を加熱して保温する機能を有している。浴槽１の側壁１ａの下部には循環アダプター７を装着してあり、給湯器４と循環アダプター７とは保温循環路５にて連通させてある。この保温循環路５は往路管５ａと復路管５ｂとで構成されている。給湯器４には保温用循環ポンプが内装されており、浴槽１内に浴湯を張った状態で保温用循環ポンプを駆動すると、浴槽１内の浴湯が循環アダプター７から復路管５ｂを通って給湯器４に吸入され、給湯器４で加熱されてから往路管５ａを通って循環アダプター７から吐出するように循環して浴槽１内の浴湯が保温される。また浴槽１に湯を張る場合は、給湯器４に給水した水を沸かした湯が往路管５ａ、循環アダプター７を介して供給される。
【００１６】
保温循環路５の往路管５ａの途中から給湯管８を分岐してあり、この往路管５ａと給湯管８との交点に電動三方弁９を配置してあり、往路管５ａから循環アダプター７に湯が流れる状態と往路管５ａから給湯管８に湯が流れる状態とに切り替えることができるようになっている。また給湯器４や電動三方弁９は給湯器４内の制御部１０で制御されるようになっている。また浴槽１のフランジ１ｂには風呂蓋検知センサー１１を設けてあり、浴槽１の上面開口を風呂蓋６で閉塞したとき風呂蓋６を検知するようになっている。また浴室の壁面には温度・湿度センサー１２を設けてあり、浴室内の温度及び湿度を検知するようになっている。また給湯器４には例えば圧力センサーのような水位検知センサー（図示せず）を内蔵させてあり、水位センサーにて浴槽１内の浴湯の水位を検知できるようになっている。上記風呂蓋検知センサー１１、温度・湿度センサー１２、水位検知センサーで検知した信号は制御部１０に入力されるようになっている。
【００１７】
浴槽１内に浴湯を張った状態で往路管５ａと循環アダプター７とが連通するように電動三方弁９を切り替え、保温用循環ポンプを駆動すると、浴槽１内の浴湯が循環アダプター７から復路管５ｂを介して吸い込まれ、給湯器４で加熱して往路管５ａ、循環アダプター７を介して浴槽１内に吐出するように循環し、冷めた浴湯が加熱されて一定温度に保温される。このように浴湯を保温する動作をする時間以外の時間で、電動三方弁９を切り替えて往路管５ａと給湯管８とを連通させ、保温用循環ポンプを駆動することにより、給湯管８から噴射ノズル２に湯が供給され、噴射ノズル２から湯が噴射される。このようにして浴湯を保温する時間以外の時間に一定時間毎に噴射ノズル２から浴槽１の内壁面３に湯を流すことができる。従って、垢等の汚れが乾いて付きやすい浴槽１の内壁面３の喫水線より上を乾かないようにして汚れが付きにくいようにできる。また保温用循環ポンプを利用して浴槽１の内壁面３に湯を流すことができる。
【００１８】
また給湯器４内にある水位検知センサーにより、浴槽１内を湯の水位を検知しし、噴射ノズル２から出す湯の流量を制御することができる。つまり、浴槽１内の水位が低い場合、浴槽１の内壁面３の空気に触れている部分が多いため、流量が多くなるように制御する。逆に浴槽１の水位が高い場合は、浴槽１の内壁面３の空気に触れている部分が少ないため、流量が少ないように制御する。このようにすると、水位に応じて適切に流量を制御して無駄をなくすことができ、省エネルギー化を図ることができる。
【００１９】
また温度・湿度センサー１２にて浴室内の温度や湿度が検知されており、温度や湿度により噴射ノズル２から湯を出す頻度を制御することもできる。つまり、浴室内の温度が高い場合は、浴槽１の内壁面３が乾きやすくなるため、噴射ノズル２から湯を流す頻度が多くなるように制御する。また湿度が高い程、噴射ノズル２から湯を流す頻度が少なくなるように制御する。このようにすることでも、浴室内の温度や湿度に応じて適切に流量を制御して無駄をなくすことができ、省エネルギー化を図ることができる。
【００２０】
また浴槽１を風呂蓋６で蓋したか否かが風呂蓋検知センサー１１で検知されるようになっており、風呂蓋６で蓋をするか否かにより噴射ノズル２から湯を出す頻度を制御することができるようになっている。つまり、浴槽１を風呂蓋６で蓋した場合は、浴槽１の内壁面３の表面も乾きにくくなるため、風呂蓋６で蓋したことを風呂蓋検知センサー１１で検知すると、噴射ノズル２から湯を出す頻度を大幅に少なくして無駄をなくすことができ、省エネルギー化を図ることができる。
【００２１】
また入浴者が浴槽１内に入り浴槽１内の水位が高くなった後、浴槽１を出ると水位が低くなり、汚れが喫水線に残しやすくなる。そこで、浴槽１から入浴者が出たときの水位を給湯器４の水位検知センサーで検知したとき噴射ノズル２から湯を一定時間流す制御をするようになっている。このようにすることにより、入浴者が浴槽１から出るとき水位が減って、浴槽１の内壁面３に付きやすくなった汚れを直ぐに湯で洗い落とすことにより、汚れが付きにくくできる。
【００２２】
また浴槽１の湯の排水時に、浴槽１の水位減少を水位検知センサーで検知し、排水終了時まで湯を噴射ノズル２から流し、浴槽１の内壁面３に残されている汚れを順次上から流して行く制御をすることができる。このように浴槽１の湯の排水時には、特に随時湯を流すことにより喫水線に取り残されている汚れを落として行くことができ、汚れが付きにくくできる。
【００２３】
また浴槽の湯の排水完了を水位検出センサーにより検知した後、給湯器４から奇麗な水道水を供給し、噴射ノズル２から奇麗な水道水を出し、浴槽１の内壁面３を再度洗い流して汚れを落とす制御ができるようになっている。このように浴槽１の湯の排水終了後は奇麗な水道水を給湯器４から供給することにより浴槽１の内壁面３に付いた僅かな汚れも最終的に洗い流すことができる。
【００２４】
【発明の効果】
本発明は噴射ノズルから噴射した湯を浴槽の内壁面に沿って流すことで垢等の汚れが乾いて付き易い内壁面の喫水線より上の位置を乾かないようにして汚れが付きにくいようにできるものであり、しかも給湯器の保温循環路から分岐して噴射ノズルに湯を供給するために給湯器の保温用循環ポンプにて湯を噴射ノズルに供給でき、従来のように防汚のために特別に循環ポンプを要せず、コスト的に安価にできると共に設置に場所をとらないようにできるものである。
【図面の簡単な説明】
【図１】本発明の実施の形態の一例を説明する概略系統図である。
【符号の説明】
１浴槽
２噴射ノズル
３内壁面
４給湯器
５保温循環路[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antifouling device for an inner wall surface of a bathtub that prevents dirt such as dirt from adhering to the inner wall surface of the bathtub.
[0002]
[Prior art]
In general, in a bathtub, dirt such as dirt is likely to dry and adhere to the position above the water line on the inner wall surface. In recent years, however, an injection nozzle has been provided at the top of the bathtub to inject hot water or water from the injection nozzle. There is provided an antifouling device (for example, see Patent Document 1) that prevents hot water or water from flowing along the inner wall surface to prevent dirt and other dirt from adhering to the inner wall surface.
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 6-304085
[Problems to be solved by the invention]
By the way, in the above conventional example, bath water or city water is supplied to the injection nozzle with a circulation pump in order to inject hot water or water from the injection nozzle, and hot water or water is injected from the injection nozzle to the bathtub. In order to prevent the inner wall surface from being soiled, a special circulation pump must be specially installed for that purpose. This increases the cost and has a problem in that it takes a lot of space to install the circulation pump.
[0005]
In addition, in the above conventional example, when hot water or water is flowed from the injection nozzle to prevent fouling, the hot water or water is always flowed in a constant state regardless of the water level of the bathtub. It cannot be shed. That is, even if it is not dirty, extra hot water or water is used to waste energy.
[0006]
The present invention has been made in view of the above points. Of course, hot water can be flowed along the inner wall surface of the bathtub to prevent the inner wall surface from being soiled. An antifouling device for the inner wall surface of a bathtub that can supply hot water without installing a circulation pump, can be made inexpensive in cost, saves space for installation, and can save energy by flowing hot water appropriately. The issue is to provide.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, the antifouling device for an inner wall surface of a bathtub according to the present invention causes the hot water sprayed from the spray nozzle 2 at the upper part of the bathtub 1 to flow along the inner wall surface 3 of the bathtub 1 at a predetermined interval. In the antifouling device for the inner wall surface of the bathtub for preventing the inner wall surface 3 of the water, the hot water in the bathtub 1 is branched from the heat retaining circuit 5 of the water heater 4 to supply the hot water to the injection nozzle 2. The frequency of flowing hot water from the spray nozzle is controlled to change depending on the temperature and humidity in the bathroom .
[0008]
As described above, the hot water sprayed from the spray nozzle 2 flows along the inner wall surface 3 of the bathtub 1 so that dirt such as dirt is dried and the position above the water line of the inner wall surface 3 that is easily attached is prevented from being dried. It can be made difficult to stick. Moreover, hot water can be supplied to the injection nozzle 2 by the heat-retaining circulation pump of the water heater 4 in order to branch off from the heat insulation circulation path 5 of the water heater 4 and supply the hot water to the injection nozzle 2. In addition, no special circulation pump is required, so that the cost can be reduced and the installation space can be saved. And when the temperature in a bathroom is high, since the inner wall surface 3 of the bathtub 1 is easy to dry, the frequency which sprays hot water from the injection nozzle 2 is increased, and when the humidity in a bathroom is high, the inner wall surface 3 becomes difficult to dry. Therefore, by reducing the frequency of spraying hot water from the spray nozzle 2, hot water can be flowed to the inner wall surface 3 at an appropriate frequency according to the conditions in the bathroom, and an energy saving operation can be performed.
[0011]
In addition, the antifouling device for the inner wall surface of the bathtub that makes the inner wall surface 3 of the bathtub 1 antifouling by flowing hot water sprayed from the spray nozzle 2 at the upper part of the bathtub 1 along the inner wall surface 3 of the bathtub 1 at a predetermined interval. The hot water in the bathtub 1 is heated from the heat retaining circuit 5 of the water heater 4 to supply the hot water to the spray nozzle 2, and when the bathtub 1 is covered with the bath lid, the bath lid is detected. Control is performed such that the frequency of flowing hot water from the injection nozzle 2 is greatly reduced. The hot water sprayed from the spray nozzle 2 is made to flow along the inner wall surface 3 of the bathtub 1 so that dirt such as dirt is dried and the position above the water line of the inner wall surface 3 where it is easy to stick is not dried. it can. Moreover, hot water can be supplied to the injection nozzle 2 by the heat-retaining circulation pump of the water heater 4 in order to branch off from the heat insulation circulation path 5 of the water heater 4 and supply the hot water to the injection nozzle 2. without the need for special circulation pump, as possible out so that it does not take place to the installation along with the cost to be inexpensive. And, because when you capped with bath lid 6 to be difficult to dry the inner wall surface 3 of the bath 1, can greatly reduce the hot water flow from the injection nozzle 2 can energy saving operation.
[0012]
It is also preferable that the hot water is controlled to flow from the injection nozzle 2 when a change in the level of the hot water when the bather leaves the bathtub 1 is detected. When the bather leaves the bathtub 1, the water level of the bath water is lowered and the dirt that has been easily attached to the inner wall surface 3 is immediately washed off with hot water so that the dirt becomes difficult to be attached.
[0013]
Moreover, it is also preferable that the hot water is controlled to flow from the injection nozzle 2 when a change in the water level at the time of draining the hot water in the bathtub 1 is detected. When the bath water in the bathtub 1 is drained, the dirt remaining on the water line is removed by flowing hot water as needed, so that the dirt is hardly attached.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the bathtub 1 has a flange 1b protruding outward around the upper end of the side wall 1a, and a plurality of injection nozzles 2 for injecting hot water are arranged at appropriate intervals on the upper end of the side wall 1a. It is set up. The water heater 4 is installed outside the bathroom, and has a function of heating the water supplied to the water heater 4 to boil hot water or heating the hot water returned from the bathtub 1 to keep it warm. Yes. A circulation adapter 7 is attached to the lower part of the side wall 1 a of the bathtub 1, and the hot water heater 4 and the circulation adapter 7 are communicated with each other through a heat insulation circuit 5. This heat insulation circulation path 5 is composed of an outward path pipe 5a and a return path pipe 5b. The water heater 4 is equipped with a heat-retaining circulation pump. When the heat-retaining circulation pump is driven in a state where the hot water is filled in the bathtub 1, the hot water in the bathtub 1 passes from the circulation adapter 7 through the return pipe 5b. Then, the water is sucked into the water heater 4 and heated by the water heater 4, and then circulated so as to be discharged from the circulation adapter 7 through the forward pipe 5 a, and the hot water in the bathtub 1 is kept warm. When hot water is added to the bathtub 1, hot water obtained by boiling the water supplied to the water heater 4 is supplied through the forward pipe 5 a and the circulation adapter 7.
[0016]
A hot water supply pipe 8 is branched from the middle of the outgoing path pipe 5a of the heat insulation circulation path 5, and an electric three-way valve 9 is arranged at the intersection of the outgoing path pipe 5a and the hot water supply pipe 8, and from the outgoing path pipe 5a to the circulation adapter 7 The state can be switched between a state in which hot water flows and a state in which hot water flows from the forward pipe 5a to the hot water supply pipe 8. The water heater 4 and the electric three-way valve 9 are controlled by a control unit 10 in the water heater 4. Also the flange 1b of the bathtub 1 is provided with a bath cover detecting sensor 11, so as to detect the bath lid 6 when closing the upper opening of the bathtub 1 in a bathroom lid 6. A temperature / humidity sensor 12 is provided on the wall surface of the bathroom to detect the temperature and humidity in the bathroom. In addition, a water level detection sensor (not shown) such as a pressure sensor is built in the water heater 4 so that the water level of the bath water in the bathtub 1 can be detected by the water level sensor. Signals detected by the bath lid detection sensor 11, temperature / humidity sensor 12, and water level detection sensor are input to the control unit 10.
[0017]
If the electric three-way valve 9 is switched so that the outgoing pipe 5a and the circulation adapter 7 communicate with each other in a state where the bath water is stretched in the bathtub 1, and the heat-retaining circulation pump is driven, the bath water in the bathtub 1 is removed from the circulation adapter 7. It is sucked in through the return pipe 5b, heated by the water heater 4 and circulated so as to be discharged into the bathtub 1 through the forward pipe 5a and the circulation adapter 7, and the cooled bath water is heated and kept at a constant temperature. The By switching the electric three-way valve 9 to connect the outgoing pipe 5a and the hot water supply pipe 8 in a time other than the time for performing the operation of keeping the hot water in this way, Hot water is supplied to the injection nozzle 2, and hot water is injected from the injection nozzle 2. In this way, hot water can be flowed from the injection nozzle 2 to the inner wall surface 3 of the bathtub 1 at regular intervals at times other than the time during which the bath water is kept warm. Therefore, it is possible to prevent the dirt from being attached to the inner wall surface 3 of the bathtub 1 which is easy to be attached when the dirt such as dirt is dried. Moreover, hot water can be poured on the inner wall surface 3 of the bathtub 1 using the circulation pump for heat insulation.
[0018]
Moreover, the water level detection sensor in the hot water heater 4 can detect the water level of the hot water in the bathtub 1 and control the flow rate of the hot water discharged from the injection nozzle 2. That is, when the water level in the bathtub 1 is low, since there are many parts which are touching the air of the inner wall surface 3 of the bathtub 1, it controls so that flow volume may increase. On the contrary, when the water level of the bathtub 1 is high, since there are few parts which are touching the air of the inner wall surface 3 of the bathtub 1, it controls so that flow volume is small. If it does in this way, according to a water level, flow volume can be controlled appropriately, a waste can be eliminated, and energy saving can be aimed at.
[0019]
Moreover, the temperature and humidity in the bathroom are detected by the temperature / humidity sensor 12, and the frequency at which hot water is discharged from the spray nozzle 2 can be controlled by the temperature and humidity. That is, when the temperature in the bathroom is high, the inner wall surface 3 of the bathtub 1 is easily dried, so that the frequency of flowing hot water from the spray nozzle 2 is increased. Moreover, it controls so that the frequency which flows hot water from the injection nozzle 2 decreases, so that humidity is high. Also by doing in this way, waste can be eliminated by appropriately controlling the flow rate according to the temperature and humidity in the bathroom, and energy saving can be achieved.
[0020]
In addition, whether or not the bathtub 1 is covered with the bath lid 6 is detected by the bath lid detection sensor 11, and the frequency at which hot water is discharged from the spray nozzle 2 is controlled depending on whether or not the bath lid 6 is covered. Can be done. That is, when the bathtub 1 is covered with the bath lid 6 , the surface of the inner wall surface 3 of the bathtub 1 is also difficult to dry. Therefore, when the bath lid detection sensor 11 detects that the bath lid 6 has been covered, The frequency of giving out can be greatly reduced, so that waste can be eliminated and energy saving can be achieved.
[0021]
Moreover, when a bather enters the bathtub 1 and the water level in the bathtub 1 becomes high and then exits the bathtub 1, the water level becomes low and dirt is easily left on the water line. Then, when the water level when a bather comes out of the bathtub 1 is detected by the water level detection sensor of the water heater 4, the hot water is controlled to flow from the injection nozzle 2 for a certain period of time. By doing in this way, when a bather leaves the bathtub 1, a water level decreases, and the dirt which became easy to attach to the inner wall surface 3 of the bathtub 1 can be washed away with hot water immediately, and it can become difficult to get dirt.
[0022]
When the hot water in the bathtub 1 is drained, the water level decrease sensor of the bathtub 1 is detected by the water level detection sensor. It is possible to control the flow. Thus, when the hot water of the bathtub 1 is drained, the dirt left on the water line can be removed by flowing hot water as needed, and the dirt can be hardly attached.
[0023]
Moreover, after detecting the completion of drainage of the hot water in the bathtub, clean tap water is supplied from the water heater 4, clean tap water is discharged from the spray nozzle 2, and the inner wall surface 3 of the bathtub 1 is washed away again. Can be controlled to drop. Thus, after the drainage of the hot water in the bathtub 1 is finished, a slight amount of dirt attached to the inner wall surface 3 of the bathtub 1 can be finally washed away by supplying clean tap water from the water heater 4.
[0024]
【The invention's effect】
The present invention allows the hot water sprayed from the spray nozzle to flow along the inner wall surface of the bathtub, so that dirt such as dirt can be dried and the position above the water line on the inner wall surface, which is likely to be stuck, is not dried, so that dirt is not easily attached In order to supply water to the injection nozzle by branching from the heat-retention circulation path of the water heater, hot water can be supplied to the injection nozzle by the heat-retaining circulation pump of the water heater. A special circulation pump is not required, and the cost can be reduced and the installation space can be saved.
[Brief description of the drawings]
FIG. 1 is a schematic system diagram illustrating an example of an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bathtub 2 Injection nozzle 3 Inner wall surface 4 Water heater 5 Thermal insulation circuit

Claims

In the antifouling device for the inner wall of the bathtub, the hot water in the bathtub is kept warm by flowing the hot water sprayed from the spray nozzle at the upper part of the bathtub along the inner wall of the bathtub at a predetermined interval. The bathtub is characterized in that it is branched from the heat-retention circulation path of the hot water heater to supply hot water to the spray nozzle, and the frequency of flowing hot water from the spray nozzle is controlled to change according to the temperature and humidity in the bathroom. Antifouling device for the inner wall surface.

In the antifouling device for the inner wall of the bathtub, the hot water in the bathtub is kept warm by flowing the hot water sprayed from the spray nozzle at the upper part of the bathtub along the inner wall of the bathtub at a predetermined interval. So that hot water is supplied to the injection nozzle by branching from the heat-retention circuit of the water heater, and when the bathtub is covered with a bath lid, the bath lid is detected and the frequency of flowing hot water from the injection nozzle is greatly reduced. An antifouling device for the inner wall surface of a bathtub, characterized in that

The antifouling device for an inner wall surface of a bathtub according to claim 1 or 2, wherein the bath water is controlled to flow from an injection nozzle when a water level change of the bath water is detected when the bather leaves the bathtub.

The antifouling device for an inner wall surface of a bathtub according to claim 1 or 2, wherein hot water is controlled to flow from an injection nozzle when a water level change during drainage of bath water in the bathtub is detected.