JPH06103120B2 - Backflow prevention device for bathtub with water heater and method of using the device - Google Patents
Backflow prevention device for bathtub with water heater and method of using the deviceInfo
- Publication number
- JPH06103120B2 JPH06103120B2 JP1164564A JP16456489A JPH06103120B2 JP H06103120 B2 JPH06103120 B2 JP H06103120B2 JP 1164564 A JP1164564 A JP 1164564A JP 16456489 A JP16456489 A JP 16456489A JP H06103120 B2 JPH06103120 B2 JP H06103120B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- backflow prevention
- hot water
- prevention chamber
- valve
- 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
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、給湯器付き風呂釜の逆流防止装置と、その逆
流防止装置を用いて浴槽へ直圧給湯させると共に非給湯
時には雑水の逆流を防止する方法に関する。Description: TECHNICAL FIELD The present invention relates to a backflow prevention device for a bath with a water heater, a direct pressure hot water supply to a bathtub using the backflow prevention device, and a backflow of miscellaneous water when not hot water is supplied. Regarding how to prevent.
［背景技術］ 浴槽内の湯を循環させる循環回路のような雑水回路と給
湯回路のような上水回路とを接続する場合、雑水が上水
回路に逆流しないよう措置することが義務付けられてい
る。この逆流防止の方法として、従来からシスターン方
式とバキュームブレーカ方式が用いられている。[Background Art] When connecting a miscellaneous water circuit such as a circulation circuit that circulates hot water in a bathtub and a clean water circuit such as a hot water supply circuit, it is obligatory to take measures so that the miscellaneous water does not flow back into the clean water circuit. ing. As a method for preventing this backflow, the cistern method and the vacuum breaker method have been conventionally used.
（従来例Ｉ）第７図に示すものは、従来のシスターン方
式による雑水の逆流防止方法である。この方式にあって
は、フロートスイッチ101を備えたタンク102を設置し、
タンク102の吐出口を三方弁103等を介して風呂循環回路
105の循環ポンプ106の吸込側に接続してあり、給湯器10
7に接続された給湯回路108の端部をタンク102内に配置
してある。しかして、非給湯時は、タンク102と給湯回
路108が接続されておらず、縁が切れているので、タン
ク102側の雑水が上水回路へ逆流するのが防止されてい
る。一方、給湯時には、給湯回路108の落とし込み開閉
弁104を開き、給湯器107によって加熱された湯（もしく
は、水）を一旦タンク102内に落とし込み、タンク102内
の湯を三方弁103を介して循環回路105に送り込み、循環
ポンプ106を運転して強制的に循環回路106から浴槽109
内へ給湯するようになっている。(Conventional Example I) FIG. 7 shows a conventional method for preventing backflow of miscellaneous water by the cistern method. In this system, a tank 102 equipped with a float switch 101 is installed,
The outlet of the tank 102 is connected to the bath circulation circuit via a three-way valve 103, etc.
It is connected to the suction side of circulation pump 106 of 105, and water heater 10
The end of the hot water supply circuit 108 connected to 7 is arranged in the tank 102. Then, when the hot water is not supplied, the tank 102 and the hot water supply circuit 108 are not connected and the edges are cut off, so that the miscellaneous water on the tank 102 side is prevented from flowing back to the clean water circuit. On the other hand, when hot water is supplied, the drop opening / closing valve 104 of the hot water supply circuit 108 is opened, the hot water (or water) heated by the hot water supply device 107 is once dropped into the tank 102, and the hot water in the tank 102 is circulated through the three-way valve 103. It is sent to the circuit 105, the circulation pump 106 is operated, and the bath 109 is forced from the circulation circuit 106.
It is designed to supply hot water inside.
（従来例II）第８図に示すものは、従来のバキュームブ
レーカ方式による逆流防止方法であり、給湯圧を用いて
直接給湯回路側から浴槽内へ湯を落とし込めるようにし
たものである。すなわち、給湯回路121を循環回路122の
循環ポンプ123の送出側に直結させ、給湯回路121にバキ
ュームブレーカ124、落とし込み開閉弁125及び複数の逆
止弁126,127等を設けてある。しかして、非給湯時に
は、逆止弁126,127によって雑水が給湯回路121側へ逆流
するのを防止すると共に、上水側が断水等で負圧になっ
た場合にはバキュームブレーカ124が大気に開放されて
給湯器128側と循環回路122側との縁を切って雑水の逆流
を防止する構造となっている。一方、給湯時には、バキ
ュームブレーカ124が大気から切り離され、通水圧によ
って直接に給湯回路121から循環回路122を通って浴槽12
9へ湯を落とし込んでいる。(Conventional example II) FIG. 8 shows a conventional backflow prevention method using a vacuum breaker system, in which hot water can be dropped into the bathtub directly from the hot water supply circuit side by using hot water supply pressure. That is, the hot water supply circuit 121 is directly connected to the delivery side of the circulation pump 123 of the circulation circuit 122, and the hot water supply circuit 121 is provided with a vacuum breaker 124, a drop opening / closing valve 125, a plurality of check valves 126, 127 and the like. In addition, when not supplying hot water, the check valves 126 and 127 prevent miscellaneous water from flowing back to the hot water supply circuit 121 side, and the vacuum breaker 124 is opened to the atmosphere when the clean water side becomes a negative pressure due to water interruption or the like. In this structure, the edge of the water heater 128 side and the circulation circuit 122 side is cut to prevent the backflow of miscellaneous water. On the other hand, at the time of hot water supply, the vacuum breaker 124 is separated from the atmosphere, and the hot water supply circuit 121 directly passes through the circulation circuit 122 and the bathtub 12 by the water flow pressure.
Hot water has been dropped into 9.
［発明が解決しようとする課題］ （従来例Ｉについて）しかしながら、上記のシスターン
方式にあっては、タンクと給湯回路とが接続されておら
ず、給湯回路側の給湯圧が循環回路に加わらず、またタ
ンクの水圧だけでは不十分であるので、浴槽内に湯を落
とし込む場合には、循環ポンプを運転し、ポンプ圧によ
て浴槽内に湯を落とし込む必要がある。ところが、力の
強い循環ポンプを用いると、入浴しながら追い焚きした
場合に、加熱された湯がバスアダプターから勢いよく吐
出され、バスアダプターから離れた位置まで届くので、
入浴者の体に当たり、不快感や熱感を与える恐れがあ
る。また、たとえ力の強い大型の循環ポンプを用いるこ
とができたとしても、大型の循環ポンプを用いると、装
置価格が高価になったり、騒音が大きくなったりすると
いう問題がある。このため、循環ポンプは、一般に力の
弱い小型のものが用いられている。[Problems to be Solved by the Invention] (Regarding Conventional Example I) However, in the above-described systurn system, the tank and the hot water supply circuit are not connected, and the hot water supply pressure on the hot water supply circuit side is not applied to the circulation circuit. Also, since the water pressure of the tank is not sufficient, when the hot water is dropped into the bathtub, it is necessary to operate the circulation pump and drop the hot water into the bathtub by the pump pressure. However, if you use a powerful circulation pump, when you reheat while taking a bath, the heated hot water is expelled from the bath adapter and reaches a position away from the bath adapter.
It may hit the body of the bather and cause discomfort or heat. Further, even if a large-sized circulation pump having a strong power can be used, there is a problem that the large-sized circulation pump causes an increase in device cost and noise. For this reason, a small-sized circulating pump is generally used.
したがって、循環ポンプ圧を用いて給湯するシスターン
方式では、給湯時に大きな流量を得ることができず、給
湯時間が長くかかる（特に、大型浴槽の場合、湯張り時
間が非常に長くなる。）という欠点がある。また、浴槽
が二階等の上階に設置されている場合には、循環ポンプ
の力が弱いため、浴槽への給湯能力が不足し、上階の浴
室用に十分に対応できないという問題があった。さら
に、この方式では、給湯時にも循環ポンプを運転するの
で、運転コストが高くつくと共に騒音が大きい。Therefore, in the cistern system in which hot water is supplied using the circulation pump pressure, a large flow rate cannot be obtained during hot water supply, and it takes a long time to supply hot water (especially, in the case of a large bathtub, the time for filling water is extremely long). There is. In addition, when the bathtub is installed on the upper floor such as the second floor, there is a problem that the power of the circulation pump is weak and the ability to supply hot water to the bathtub is insufficient, so that it cannot be sufficiently used for the bathroom on the upper floor. . Furthermore, in this method, since the circulation pump is operated even when hot water is supplied, the operating cost is high and the noise is large.
（従来例IIについて）一方、第８図に示すバキュームブ
レーカ方式は、水道圧を用いて給湯できる水道直圧方式
であるが、この方式で用いられているバキュームブレー
カにあっては浴槽の上端から300mm以上の高さに設置し
なければならないという制約がある。このため、浴槽が
二階等の上階に設置されている場合には、地上に設置さ
れた風呂釜からバキュームブレーカの部分を分離して浴
槽よりも上方に配置する必要があり、給湯回路を上方の
バキュームブレーカ側へ迂回させて配管する必要がある
など、実際には上階の浴槽には対応できなかった。(Regarding Conventional Example II) On the other hand, the vacuum breaker system shown in FIG. 8 is a direct water pressure system capable of supplying hot water by using the water pressure. However, the vacuum breaker used in this system starts from the upper end of the bathtub. There is a restriction that it must be installed at a height of 300 mm or more. For this reason, when the bathtub is installed on the upper floor such as the second floor, it is necessary to separate the vacuum breaker part from the bath kettle installed on the ground and place it above the bathtub. It was not possible to deal with the bathtub on the upper floor because it was necessary to make a detour to the vacuum breaker side and to pipe.
しかして、本発明は上記従来例の欠点に鑑みてなされた
ものであり、その主な目的とするところは雑水の逆流を
防止すると共に水道直圧方式により大流量による自動給
湯を可能とし、また浴槽の設置箇所に制約のない給湯器
付き風呂釜の逆流防止装置とその使用方法を提供するこ
とにある。Therefore, the present invention has been made in view of the drawbacks of the above-mentioned conventional example, and its main purpose is to prevent backflow of miscellaneous water and enable automatic hot water supply with a large flow rate by a direct water pressure system, Another object of the present invention is to provide a backflow prevention device for a bathtub with a water heater and a method of using the same, which has no restrictions on the location of the bathtub.
［課題を解決するための手段］ このため、本発明の給湯器付き風呂釜の逆流防止装置
は、給湯器から風呂循環回路に給湯するための給湯回路
に落とし込み開閉弁を設け、落とし込み開閉弁よりも循
環回路側に逆流防止室を設け、この逆流防止室から分岐
して循環回路の循環ポンプの吸込側に接続された分岐水
路を形成し、この分岐水路に逆流防止室内の水を溜める
ことのできる水溜めホッパと分岐水路を大気に連通させ
る大気連通口を設け、分岐水路の大気連通口及び水溜め
ホッパと逆流防止室との間に前記逆流防止室に通水圧が
加わると閉成して通水圧が無くなると開成する逆流防止
室開閉弁を設け、分岐水路の水溜めホッパの排水側に排
水用開閉弁を設けたことを特徴としている。[Means for Solving the Problem] Therefore, the backflow prevention device for a bath with a water heater according to the present invention is provided with a drop opening / closing valve in the hot water supply circuit for supplying hot water from the water heater to the bath circulation circuit. Also, a backflow prevention chamber is provided on the circulation circuit side, and a branch water channel that is connected to the suction side of the circulation pump of the circulation circuit is formed by branching from this backflow prevention chamber, and water in the backflow prevention chamber is stored in this branch water channel. An air communication port that connects the water reservoir hopper and the branch water channel to the atmosphere is provided, and it closes when water pressure is applied to the backflow prevention chamber between the atmosphere communication port of the branch water channel and the water reservoir hopper and the backflow prevention chamber. It is characterized in that a backflow prevention chamber opening / closing valve that opens when the water pressure is lost is provided, and a drainage opening / closing valve is provided on the drain side of the water reservoir hopper of the branch waterway.
また、本発明の給湯器付き風呂釜の逆流防止装置の使用
方法は、上記の逆流防止装置ににおいて、前記落とし込
み開閉弁を閉成すると共に排水用開閉弁を開成し、循環
ポンプの吸引力によって水溜めホッパ内の湯を風呂循環
回路へ排出させ、ついで前記落とし込み開閉弁を開成し
て給湯回路から風呂循環回路へ給湯させることを特徴と
している。Further, a method of using the backflow prevention device for a bath with a water heater according to the present invention is, in the above-mentioned backflow prevention device, configured to close the drop opening / closing valve and open the drainage opening / closing valve by the suction force of the circulation pump. The hot water in the water reservoir hopper is discharged to the bath circulation circuit, and then the drop opening / closing valve is opened to supply hot water from the hot water supply circuit to the bath circulation circuit.
［作用］ 本発明にあっては、落とし込み開閉弁を開いて給湯する
と、逆流防止室内に湯が充満し、逆流防止室開閉弁が閉
成されて分岐水路が閉じられるので、逆流防止室内の湯
を介して給湯回路の水道圧を循環回路側に加えることが
できる。したがって、給湯回路を循環回路に直結し、水
道圧を利用して給湯でき、大流量による給湯が可能にな
り、大型浴槽の場合にも短時間で湯張りを行うことがで
きる。また、浴槽が二階等の上階に設置されている場合
にも、水道圧を利用して給湯でき、浴槽の設置場所に対
する制約もなくなる。さらに、循環ポンプは小型のもの
を用いることができるので、装置を安価にすることがで
きると共に運転コストも安価となり、循環ポンプによる
騒音も減少させることができる。[Operation] In the present invention, when hot water is supplied by opening the drop opening / closing valve, the backflow prevention chamber is filled with hot water, and the backflow prevention chamber opening / closing valve is closed to close the branch water passage. The water supply pressure of the hot water supply circuit can be applied to the circulation circuit side via the. Therefore, the hot water supply circuit can be directly connected to the circulation circuit, hot water can be supplied by using the tap water pressure, hot water can be supplied at a large flow rate, and even a large bathtub can be filled with water in a short time. Even when the bathtub is installed on the upper floor such as the second floor, hot water can be used to supply hot water, and there is no restriction on the installation location of the bathtub. Furthermore, since a small circulating pump can be used, the device can be made inexpensive, the operating cost is also low, and the noise caused by the circulating pump can be reduced.
一方、落とし込み開閉弁を閉じて給湯を停止すると、逆
流防止室開閉弁が開いて内部の湯が水溜めホッパ内に落
ち、逆流防止室内が空気に置換されるので、給湯側と循
環回路側の湯の縁切りがされ、例え逆止弁等が故障した
場合でも、循環回路側の雑水が給湯回路側へ逆流するの
を防止することができる。On the other hand, when the drop-off valve is closed and hot water supply is stopped, the backflow prevention chamber on-off valve opens and the hot water inside falls into the water storage hopper, and the backflow prevention chamber is replaced with air. Even if the hot water is cut off and the check valve or the like fails, it is possible to prevent the miscellaneous water on the circulation circuit side from flowing back to the hot water supply circuit side.
さらに、水溜めホッパ内に落ちた湯は、排水用開閉弁を
開成し、循環ポンプの吸引力によって循環回路へ強制排
出することができるので、器外へ漏出することがなく、
周囲を汚すことなく衛生的に用いることができる。ま
た、排水用開閉弁を開いて循環ポンプにより強制排出す
るので、浴槽が上階に設置されている場合でも、確実に
水溜めホッパ内の湯を排出でき、バキュームブレーカの
ように設置箇所の制約を受けない。Furthermore, since the hot water that has fallen into the water storage hopper can be forcibly discharged to the circulation circuit by opening the drainage on-off valve and the suction force of the circulation pump, it does not leak out of the device.
It can be used hygienically without polluting the surroundings. Also, because the drainage on-off valve is opened and forced discharge is performed by the circulation pump, even when the bathtub is installed on the upper floor, the hot water in the water reservoir hopper can be reliably discharged, and there is a restriction on the installation location like a vacuum breaker. Do not receive
また、本発明方法のように、給湯前に水溜めホッパ内の
湯を循環回路側へ排出するようにすれば、給湯停止時に
水溜めホッパ内で湯が溢れて外部に漏出することを確実
に防止できる。Further, like the method of the present invention, if the hot water in the water storage hopper is discharged to the circulation circuit side before hot water supply, it is possible to ensure that the hot water overflows in the water storage hopper and leaks to the outside when the hot water supply is stopped. It can be prevented.
［実施例］ 以下、本発明の実施例を添付図に基づいて詳述する。[Examples] Examples of the present invention will be described below in detail with reference to the accompanying drawings.
第１図に示すものは、逆流防止装置17を備えた風呂釜の
概略図である。浴槽13のバスアダプター14には、追い焚
き等を行うための循環回路２が接続されており、循環回
路２には風呂用熱交換器15と三方弁16と循環ポンプ７が
設けられている。給湯器１に接続された給湯回路３は、
循環回路２の三方弁16に直結されている。給湯回路３に
は、落とし込み開閉弁４と逆止弁６と逆流防止室５が設
けられている。逆止弁６は、循環回路２側から給湯器１
側への逆流を防止する向きに配置されている。逆流防止
室５は、内部に湯もしくは空気を保持できる構造となっ
ており、逆流防止室５からは分岐水路８が分岐させられ
ている。分岐水路８にはオーバフロー孔を兼ねた大気連
通口10を有する水溜めホッパ９が設けられており、水溜
めホッパ９の大気連通口10よりも下方の容積は、逆流防
止室５内の容積よりも若干大きくなっている。逆流防止
室５と水溜めホッパ９の間には、逆流防止室開閉弁11が
設けられており、逆流防止室開閉弁11を閉じると、逆流
防止室５内に湯を充満させることができ、開成すると逆
流防止室５内の湯が水溜めホッパ９へ落ちて逆流防止室
５内が大気連通口10から流入した空気と置換されるよう
になっている。また、分岐水路８の終端部は三方弁16も
しくは給湯回路３の終端部に接続されており、分岐水路
８の水溜めホッパ９の排出側には排水用開閉弁12が設け
られ、排水用開閉弁12を開成することにより水溜めホッ
パ９内の湯を循環回路２側へ排出できるようにしてあ
る。FIG. 1 is a schematic view of a bathtub equipped with a backflow prevention device 17. The bath adapter 14 of the bathtub 13 is connected to the circulation circuit 2 for reheating, and the circulation circuit 2 is provided with a bath heat exchanger 15, a three-way valve 16, and a circulation pump 7. The hot water supply circuit 3 connected to the water heater 1
It is directly connected to the three-way valve 16 of the circulation circuit 2. The hot water supply circuit 3 is provided with a drop opening / closing valve 4, a check valve 6, and a backflow prevention chamber 5. The check valve 6 is installed in the water heater 1 from the circulation circuit 2 side.
It is arranged so as to prevent backflow to the side. The backflow prevention chamber 5 has a structure capable of holding hot water or air therein, and a branch water channel 8 is branched from the backflow prevention chamber 5. The branch water passage 8 is provided with a water storage hopper 9 having an atmosphere communication port 10 which also serves as an overflow hole. The volume of the water storage hopper 9 below the atmosphere communication port 10 is smaller than the volume in the backflow prevention chamber 5. Is also slightly larger. A backflow prevention chamber opening / closing valve 11 is provided between the backflow prevention chamber 5 and the water storage hopper 9, and when the backflow prevention chamber opening / closing valve 11 is closed, the backflow prevention chamber 5 can be filled with hot water. When opened, the hot water in the backflow prevention chamber 5 falls into the water storage hopper 9 and the inside of the backflow prevention chamber 5 is replaced with the air flowing in from the atmosphere communication port 10. Further, the end of the branch water channel 8 is connected to the three-way valve 16 or the end of the hot water supply circuit 3, and a drain opening / closing valve 12 is provided on the discharge side of the water reservoir hopper 9 of the branch water channel 8 for opening / closing the drain. By opening the valve 12, the hot water in the water storage hopper 9 can be discharged to the circulation circuit 2 side.
第２図示すものは、第１図で破線により囲んだ部分を一
体に構成した逆流防止装置17の詳細な断面図である。ケ
ーシング18の上部側面には入管接続口19が開口されてお
り、この入管接続口19には給湯回路３を構成する給湯入
管20が接続されており、給湯器１で加熱された湯が入管
接続口19からケーシング18内に送り込まれるようになっ
ている。ケーシング18内の中央部には、逆流防止室５が
形成されており、逆流防止室５の下方には、水溜めホッ
パ９が設けられている。逆流防止室５と水溜めホッパ９
との間は仕切り板21によって仕切られており、仕切り板
21の中央部には逆流防止室５内の残り湯を水溜めホッパ
９側へ抜くための水抜き孔22が穿孔されている。水溜め
ホッパ９の側面には大気と連通した大気連通口10が開口
されており、水溜めホッパ９の大気連通口10よりも下の
容積は逆流防止室５の容積よりも若干大きくなってい
る。また、水溜めホッパ９の底面には、分岐水路８に接
続させるための排水口23が開口されており、排水口23の
下方には排水用開閉弁12が取り付けられている。逆流防
止室５の側方には第二逆止弁収納室24が設けられてお
り、第二逆止弁収納室24の底面には出管接続口25が開口
され、出管接続口25には給湯回路３を構成していて三方
弁16に接続される給湯出管26が圧入されている。しかし
て、逆流防止装置17のケーシング18内においては、入管
接続口19→逆流防止室５→第二逆止弁収納室24→出管接
続口25という経路で給湯回路３が構成されており、一方
水溜めホッパ９→排水口23→排水用開閉弁12という経路
で逆流防止室５から分岐した分岐水路８が構成されてい
る。FIG. 2 is a detailed sectional view of the backflow prevention device 17 in which the portion surrounded by the broken line in FIG. 1 is integrally configured. An inlet pipe connection port 19 is opened on the upper side surface of the casing 18, and a hot water supply inlet pipe 20 that constitutes the hot water supply circuit 3 is connected to the inlet pipe connection port 19 so that hot water heated by the water heater 1 is connected to the inlet pipe. It is adapted to be fed into the casing 18 through the mouth 19. A backflow prevention chamber 5 is formed in the center of the casing 18, and a water reservoir hopper 9 is provided below the backflow prevention chamber 5. Backflow prevention chamber 5 and water storage hopper 9
The space between and is separated by a partition plate 21.
A water drain hole 22 is formed in the center of 21 for draining the remaining hot water in the backflow prevention chamber 5 toward the hopper 9 side. An atmosphere communication port 10 communicating with the atmosphere is opened on the side surface of the water storage hopper 9, and the volume of the water storage hopper 9 below the atmosphere communication port 10 is slightly larger than the volume of the backflow prevention chamber 5. . A drain port 23 for connecting to the branch water channel 8 is opened on the bottom surface of the water storage hopper 9, and a drain opening / closing valve 12 is attached below the drain port 23. A second check valve storage chamber 24 is provided on the side of the backflow prevention chamber 5, and an outlet pipe connection port 25 is opened on the bottom surface of the second check valve storage chamber 24. In the hot water supply circuit 3, a hot water supply outlet pipe 26 connected to the three-way valve 16 is press-fitted. Then, in the casing 18 of the backflow prevention device 17, the hot water supply circuit 3 is configured by a path of the inlet pipe connection port 19 → the backflow prevention chamber 5 → the second check valve storage chamber 24 → the outlet pipe connection port 25. On the other hand, a branch water channel 8 branched from the backflow prevention chamber 5 is constituted by a path of the water reservoir hopper 9 → the drain port 23 → the drain opening / closing valve 12.
さらに、入管接続口19は逆流防止室入り口27と連通して
おり、入管接続口19と逆流防止室入り口27とを結ぶ水路
28には落とし込み開閉弁４が設けられている。落とし込
み開閉弁４は、ソレノイド型電磁弁であり、弁座29に対
向させて配置されたダイヤフラム30の外周部をケーシン
グ18に固定し、プランジャー31の先端をダイヤフラム30
の中心に連結させてある。よって、通電によりプランジ
ャー31を後退させると給湯回路３が開成され、プランジ
ャー31を突出させるとダイヤフラム30が弁座29に圧接し
て逆流防止室５の上水側で給湯回路３が閉成される。Further, the inlet pipe connection port 19 communicates with the backflow prevention chamber entrance 27, and connects the inlet pipe connection port 19 and the backflow prevention chamber entrance 27 with a water channel.
A drop-in on-off valve 4 is provided at 28. The drop opening / closing valve 4 is a solenoid-type solenoid valve, and an outer peripheral portion of a diaphragm 30 arranged to face the valve seat 29 is fixed to the casing 18, and a tip of a plunger 31 is attached to the diaphragm 30.
It is connected to the center of. Therefore, when the plunger 31 is retracted by energization, the hot water supply circuit 3 is opened, and when the plunger 31 is projected, the diaphragm 30 is pressed against the valve seat 29 and the hot water supply circuit 3 is closed on the clean water side of the backflow prevention chamber 5. To be done.
第一逆止弁６及び逆流防止室開閉弁11は、組み合わせて
逆流防止室５内に納入されている。第一逆止弁６は逆流
防止室入り口27と対向させて配置されており、その上面
には逆流防止室入り口27を囲むようにしてゴムパッキン
32が取着されており、バネ33によって入り口27の閉成方
向へ弾性的に付勢されている。また、第一逆止弁６の下
部外周には圧動板34が延出されており、圧動板34は逆流
防止室５の内寸とほぼ等しい寸法を有している。この圧
動板34は、入り口27から流入した湯の通水圧を全面で受
けて第一逆止弁６の動作を確実にする働きをしており、
さらに外周面が逆流防止室５の内壁面と摺接しており、
第一逆止弁６が傾いたりすることなくスムーズに摺動で
きるようガイドの働きをしている。第一逆止弁６の下面
には凹所35が設けられており、また逆流防止室５の底の
仕切り板21の中心には軸受け孔36が穿孔されており、逆
流防止室開閉弁11は、頭部37を上記凹所35内にスライド
自在に遊挿されると共に軸部38を軸受け孔36内に摺動自
在に挿入されて上下方向に摺動可能に保持されており、
さらにバネ39によって上方へ弾性的に付勢されている。
逆流防止室開閉弁11の頭部37の外径は第一逆止弁６の下
面の凹所35の内径よりも小さく、頭部37と凹所35との間
には隙間が生じるようになっており、逆流防止室開閉弁
11の軸心には上下に貫通してエア通し孔40が穿孔されて
おり、逆流防止室開閉弁11の上端にはエア通し孔40を囲
むようにしてＯリング41が保持されている。さらに、逆
流防止室開閉弁11のの下面には、複数の水抜き孔22を囲
むようにしてゴムパッキン42が取着されている。The first check valve 6 and the backflow prevention chamber opening / closing valve 11 are delivered in the backflow prevention chamber 5 in combination. The first check valve 6 is disposed so as to face the backflow prevention chamber inlet 27, and the upper surface thereof is surrounded by the rubber packing so as to surround the backflow prevention chamber inlet 27.
32 is attached, and is elastically biased toward the closing direction of the entrance 27 by the spring 33. A pressure plate 34 extends on the outer periphery of the lower portion of the first check valve 6, and the pressure plate 34 has a size substantially equal to the inner size of the backflow prevention chamber 5. This pressure plate 34 has a function of ensuring the operation of the first check valve 6 by receiving the water flow pressure of the hot water flowing from the inlet 27 over the entire surface.
Furthermore, the outer peripheral surface is in sliding contact with the inner wall surface of the backflow prevention chamber 5,
The first check valve 6 functions as a guide so that the first check valve 6 can slide smoothly without tilting. A recess 35 is provided in the lower surface of the first check valve 6, and a bearing hole 36 is formed in the center of the partition plate 21 at the bottom of the check valve 5 to prevent the check valve 11 from opening and closing the check valve 11. , A head portion 37 is slidably inserted into the recess 35, and a shaft portion 38 is slidably inserted into the bearing hole 36 so as to be held slidably in the vertical direction.
Further, it is elastically biased upward by the spring 39.
The outer diameter of the head portion 37 of the check valve 11 is smaller than the inner diameter of the recess 35 on the lower surface of the first check valve 6, and a gap is formed between the head portion 37 and the recess 35. Check valve for check valve
An air passage hole 40 is formed in the axial center of the hole 11 so as to vertically penetrate therethrough, and an O-ring 41 is held at the upper end of the check valve 11 so as to surround the air passage hole 40. Further, a rubber packing 42 is attached to the lower surface of the backflow prevention chamber opening / closing valve 11 so as to surround the plurality of water drain holes 22.
しかして、落とし込み開閉弁４が開成された場合には、
第一逆止弁６が給湯圧によりバネ33に抗して押し下げら
れて入り口27が開かれ、逆流防止室開閉弁11も第一逆止
弁６によって押し下げられる（この時の状態を第２図の
第一逆止弁６及び逆流防止室開閉弁11の左半分で示
す）。この場合には、逆流防止室開閉弁11のゴムパッキ
ン42が仕切り板21に圧接して水抜き孔22及び軸受け孔36
を塞いでおり、同時にＯリング41を介して頭部37が凹所
35に圧接し、エア通し孔40も塞がれている。したがっ
て、この時には、逆流防止室５内へ流入した湯は水抜き
孔22やエア通し孔40から水溜めホッパ９側へ漏れること
なく逆流防止室５内に充満し、さらに第二逆止弁収納室
24側へ送られ（第二逆止弁44が開く）、循環回路２側へ
給湯される。Then, when the drop-in on-off valve 4 is opened,
The first check valve 6 is pushed down against the spring 33 by the hot water supply pressure to open the inlet 27, and the check valve 11 is also pushed down by the first check valve 6 (the state at this time is shown in FIG. 2). (The left half of the first check valve 6 and the check valve 11 of the check valve). In this case, the rubber packing 42 of the backflow prevention chamber opening / closing valve 11 is pressed against the partition plate 21 so that the water drain hole 22 and the bearing hole 36.
And at the same time the head 37 is recessed through the O-ring 41.
It is pressed against 35 and the air through hole 40 is also blocked. Therefore, at this time, the hot water that has flowed into the backflow prevention chamber 5 fills the backflow prevention chamber 5 without leaking from the water drain hole 22 or the air passage hole 40 to the water reservoir hopper 9 side, and the second check valve is stored. Room
It is sent to the 24 side (the second check valve 44 opens), and hot water is supplied to the circulation circuit 2 side.
逆に、落とし込み開閉弁４が閉じられた場合には、第一
逆止弁６に通水圧が加わらなくなるので、第一逆止弁６
が上昇し，第一逆止弁６が少し上昇すると逆流防止室開
閉弁11との間に隙間が生じてエア通し孔40が開く。開い
たエア通し孔40を通して水溜めホッパ９側から逆流防止
室５内にエアが流入すると逆流防止室５内が速やかに減
圧され、第一逆止弁６が上昇して入り口27を閉成すると
共に逆流防止室開閉弁11が上昇して水抜き孔22を開き、
直ちに逆流防止室５内がエアと置換される（この時の状
態を第２回の第一逆止弁６及び逆流防止室開閉弁11の右
半分で示す。）。したがって、第一逆止弁６が閉じて雑
水の逆流が防止されると共に逆流防止室５内がエアと置
換されることによって給湯器１側と循環回路２側との縁
切りが行われる。なお、水とエアとの置換時には、逆流
防止室５の底の水抜き孔22から排水されると共に排水孔
よりも上方に配置されているエア通し孔40上端からエア
を注入されるので、水及びエアの流れがスムーズにな
り、水とエアの置換が速やかに行われる。On the contrary, when the drop-in on-off valve 4 is closed, the water pressure is not applied to the first check valve 6, so the first check valve 6
When the first check valve 6 rises a little, a gap is created between the check valve 6 and the check valve 11, and the air passage hole 40 opens. When air flows into the backflow prevention chamber 5 from the water reservoir hopper 9 side through the open air passage hole 40, the inside of the backflow prevention chamber 5 is quickly depressurized, and the first check valve 6 rises to close the inlet 27. At the same time, the backflow prevention chamber opening / closing valve 11 rises to open the water drain hole 22,
Immediately, the inside of the backflow prevention chamber 5 is replaced with air (the state at this time is shown by the right half of the second check valve 6 and the backflow prevention chamber opening / closing valve 11). Therefore, the first check valve 6 is closed to prevent the backflow of miscellaneous water, and the inside of the backflow prevention chamber 5 is replaced with air, so that the water heater 1 side and the circulation circuit 2 side are cut off. When water is replaced with air, the water is drained from the drain hole 22 at the bottom of the backflow prevention chamber 5 and the air is injected from the upper end of the air passage hole 40 arranged above the drain hole. Also, the flow of air becomes smooth, and water is replaced quickly with air.
第二逆止弁収納室24内の逆流防止室５側には環状の弁座
43が設けられており、第二逆止弁収納室24内には弁座43
に対向して第二逆止弁44が横向きにスライド自在に納入
されており、第二逆止弁44はバネ45によって閉成方向へ
弾性的に付勢されている。したがって、第二逆止弁44は
逆流防止室５内に湯が充満して第二逆止弁44に通水圧が
かかった時に開成し、逆流防止室５内がエアと置換され
ている時には閉成して給湯出管26側から逆流防止室５側
への逆流を防止している。An annular valve seat is provided on the backflow prevention chamber 5 side in the second check valve storage chamber 24.
43 is provided, and the valve seat 43 is provided in the second check valve storage chamber 24.
The second non-return valve 44 is delivered so as to be slidable laterally facing the, and the second non-return valve 44 is elastically biased in the closing direction by a spring 45. Therefore, the second check valve 44 opens when the backflow prevention chamber 5 is filled with hot water and water pressure is applied to the second check valve 44, and closes when the backflow prevention chamber 5 is replaced with air. This prevents the backflow from the hot water supply pipe 26 side to the backflow prevention chamber 5 side.
大気連通口10は、水溜めホッパ９と別々に設けてもよい
が、図示例では大気連通口10を水溜めホッパ９と一体に
形成し、大気に開放されたオーバフロー管46に大気連通
口10を接続してあり、大気連通口10はオーバフロー管46
を介して大気に連通させられている。しかして、エアと
の置換時には、オーバフロー管46→大気連通口10→エア
通し孔40の経路で逆流防止室５にエアが供給される。さ
らに、通常は排水用開閉弁12は閉成されており、逆流防
止室５から水溜めホッパ９内に落ちた水は一時水溜めホ
ッパ９内に蓄えられる。そして、水溜めホッパ９内の湯
は、通常は排水用開閉弁12を開成して分岐水路８から循
環回路２へ排水されるようになっているが、逆流防止室
開閉弁11の故障等により不測に水溜めホッパ９内の水量
がオーバフローした場合には、大気連通口10からオーバ
フロー管46へ排出される。The atmosphere communication port 10 may be provided separately from the water reservoir hopper 9, but in the illustrated example, the atmosphere communication port 10 is formed integrally with the water reservoir hopper 9, and the atmosphere communication port 10 is connected to the overflow pipe 46 opened to the atmosphere. The atmosphere communication port 10 is connected to the overflow pipe 46.
Is connected to the atmosphere via. At the time of replacement with air, air is supplied to the backflow prevention chamber 5 through the path of the overflow pipe 46 → the atmosphere communication port 10 → the air passage hole 40. Further, the drainage on-off valve 12 is normally closed, and the water dropped from the backflow prevention chamber 5 into the water reservoir hopper 9 is temporarily stored in the water reservoir hopper 9. The hot water in the water reservoir hopper 9 is normally drained from the branch water passage 8 to the circulation circuit 2 by opening the drainage on-off valve 12, but due to a failure of the backflow prevention chamber on-off valve 11 or the like. When the amount of water in the water storage hopper 9 unexpectedly overflows, it is discharged from the atmosphere communication port 10 to the overflow pipe 46.
第３図、第４図及び第５図は、それぞれ上記逆流防止装
置17を備えた給湯器１付き風呂釜の給湯時、ホッパ排水
時及び循環時の動作を示す説明図である。これらの説明
図では、第１図よりも若干詳しく構成を示してあり、入
水回路47中の48は流量センサー、49は温度センサーであ
り、給湯回路３中の50は流量センサー、51は温度センサ
ー、52は出湯サーボバルブであり、給湯回路３から分岐
して浴室のカラン等に接続された出湯回路53と入水回路
47との間にはバイパス弁が配設されている。また、循環
回路２中の55は圧力センサー、56は流水スイッチであ
り、三方弁16をバイパスするように配管したバイパス回
路57には循環ポンプ７の吸込側からバスアダプター14側
に向けて順方向となるように逆止弁58を挿入してある。FIGS. 3, 4, and 5 are explanatory views showing the operation of the bath with the water heater 1 equipped with the backflow prevention device 17 during hot water supply, hopper drainage, and circulation, respectively. In these explanatory diagrams, the configuration is shown in a little more detail than in FIG. 1. 48 in the water inlet circuit 47 is a flow sensor, 49 is a temperature sensor, 50 in the hot water supply circuit 3 is a flow sensor, 51 is a temperature sensor. Reference numerals 52 and 52 are hot water discharge servo valves, which are branched from the hot water supply circuit 3 and are connected to a currant or the like in the bathroom.
A bypass valve is provided between the valve and the valve 47. Further, 55 in the circulation circuit 2 is a pressure sensor, 56 is a water flow switch, and the bypass circuit 57, which is arranged to bypass the three-way valve 16, is forwarded from the suction side of the circulation pump 7 to the bus adapter 14 side. The check valve 58 is inserted so that
しかして、第３図の給湯時の動作（湯の流れを太線で示
す）を説明すると、循環回路２の三方弁16を循環ポンプ
７の吸込側と給湯回路３側で連通するように切り替えた
状態で落とし込み開閉弁４を開成すると、通水圧により
逆流防止装置17の第一逆止弁６が押し開かれ、これに伴
って水溜めホッパ９との間の逆流防止室開閉弁11が閉じ
られる。したがって、水溜めホッパ９側へ湯が漏れるこ
となく逆流防止室５内に湯が充満し、さらに第二逆止弁
44が通水圧により押し開かれ、三方弁16の側へ給湯され
る。三方弁16を通った湯は、循環ポンプ７側と逆止弁58
側へ流れて両搬送により浴槽13へ給湯される。この給湯
方式の場合、上水側の通水圧を利用して浴槽13内に湯を
落とし込むことができるので、例えば浴槽13が二階等の
上階に設置されていても大流量により短時間のうちに湯
を落とし込むことが可能となる。なお、このとき排水用
開閉弁12は閉成されている。この後、落とし込み開閉弁
４を閉じて給湯を停止すると、第一逆止弁６および第二
逆止弁44が閉じ、これに伴ない逆流防止室開閉弁11が開
かれる。このため、逆流防止室５内の湯は水溜めホッパ
９内へ落下し、大気連通口10からのエアが逆流防止室５
内に充満させられる。したがって、逆止弁6,44が閉じる
と共に逆流防止室５内にエアが充満することにより、給
湯器１側と雑水側とが分離され、雑水の逆流が確実に防
止される。また、逆流防止室５内の湯は一時的に水溜め
ホッパ９内に溜められるので、逆流防止室５から器外へ
漏水することがない。The operation during hot water supply in FIG. 3 (the flow of hot water is indicated by a thick line) will now be described. The three-way valve 16 of the circulation circuit 2 was switched so as to communicate with the suction side of the circulation pump 7 and the hot water supply circuit 3 side. When the drop-on / off valve 4 is opened in this state, the first check valve 6 of the backflow prevention device 17 is pushed open by the water pressure, and the backflow prevention chamber on / off valve 11 with the water reservoir hopper 9 is closed accordingly. . Therefore, the backflow prevention chamber 5 is filled with the hot water without leaking the hot water to the water reservoir hopper 9 side, and the second check valve
44 is pushed open by water pressure, and hot water is supplied to the three-way valve 16 side. The hot water that has passed through the three-way valve 16 is connected to the circulation pump 7 side and the check valve 58.
It flows to the side and is supplied to the bathtub 13 by both transportations. In the case of this hot water supply system, since the hot water can be used to drop hot water into the bathtub 13, for example, even if the bathtub 13 is installed on the upper floor such as the second floor, due to the large flow volume, It is possible to drop hot water into. At this time, the drainage on-off valve 12 is closed. After that, when the drop-in on-off valve 4 is closed to stop the hot water supply, the first check valve 6 and the second check valve 44 are closed, and the backflow prevention chamber on-off valve 11 is opened accordingly. Therefore, the hot water in the backflow prevention chamber 5 falls into the water storage hopper 9, and the air from the atmosphere communication port 10 is released.
Filled inside. Therefore, when the check valves 6 and 44 are closed and the backflow prevention chamber 5 is filled with air, the water heater 1 side and the sewage side are separated, and the backflow of sewage is reliably prevented. Further, since the hot water in the backflow prevention chamber 5 is temporarily stored in the water storage hopper 9, there is no leakage of water from the backflow prevention chamber 5 to the outside of the device.
給湯停止後は水溜めホッパ９内に湯が溜った状態となる
ので、続けて次の給湯を行うと、その給湯停止時に水溜
めホッパ９内からオーバフロー46して器外へ漏水する恐
れがある。したがって、給湯停止後あるいは給湯前等に
は、水溜めホッパ９内の湯を排出する必要がある。第４
図はこのホッパ排水の方法（排水の流れを太線で示す）
を示している。ホッパ排水時には、循環回路２の三方弁
16を循環ポンプ７の吸込側と分岐水路８側で連通させる
ように切り替え、排水用開閉弁12を開成すると共に循環
ポンプ７を運転し、水溜めホッパ９内の湯を循環ポンプ
７の力で強制的に浴槽13内に排出する。これにより逆流
防止室５内にあった湯が、不用意に外部に排出されるの
を防止し、再利用できる。しかも、循環ポンプ７の力で
強制的に排出しているので、浴槽13が上階に設置されて
いる場合でも、確実にホッパ排水できる。なお、このホ
ッパ排水を行う時間が長過ぎ、水溜めホッパ９内に水が
無くなっても続けると、水溜めホッパ９内のエアを循環
回路２内に巻き込むことになるので、予め水溜めホッパ
９内の水を排出するのに要する時間を測定しておき、そ
の時間だけ循環ポンプ７を運転してホッパ排水を行うよ
うにするのが好ましい。After the hot water supply is stopped, hot water is stored in the water storage hopper 9, so if the next hot water supply is continued, there is a risk of overflow 46 from the water storage hopper 9 to the outside of the device when the hot water supply is stopped. . Therefore, it is necessary to discharge the hot water in the water storage hopper 9 after the hot water supply is stopped or before the hot water supply. Fourth
The figure shows the method of draining this hopper (the flow of drainage is indicated by a thick line)
Is shown. Three-way valve of circulation circuit 2 when hopper is drained
16 is switched so as to communicate with the suction side of the circulation pump 7 and the branch water passage 8 side, the drainage on-off valve 12 is opened, the circulation pump 7 is operated, and the hot water in the water storage hopper 9 is driven by the force of the circulation pump 7. It is forcibly discharged into the bathtub 13. As a result, the hot water in the backflow prevention chamber 5 can be prevented from being accidentally discharged to the outside and reused. Moreover, because the force of the circulation pump 7 is forcibly discharged, even if the bathtub 13 is installed on the upper floor, the hopper can be reliably drained. If the time for draining the hopper is too long and the water in the water storage hopper 9 is exhausted, the air in the water storage hopper 9 will be drawn into the circulation circuit 2 if it is continued. It is preferable to measure the time required to discharge the water inside, and to operate the circulation pump 7 for that time to perform the hopper drainage.
第５図に示すものは追い焚き等の循環動作（湯の流れを
太線で示す）を示すものであり、循環回路２の三方弁16
を給湯回路３側で閉成して循環回路２内で連通させ、循
環ポンプ７を運転する。この場合、バイパス回路57の逆
止弁58は閉成状態となり、循環ポンプ７により循環させ
られた湯は風呂用熱交換器15で加熱され、浴槽13内に再
び戻される。The one shown in FIG. 5 shows a circulation operation such as reheating (the flow of hot water is indicated by a thick line), and the three-way valve 16 of the circulation circuit 2 is shown.
Is closed on the hot water supply circuit 3 side to communicate with the circulation circuit 2, and the circulation pump 7 is operated. In this case, the check valve 58 of the bypass circuit 57 is closed, and the hot water circulated by the circulation pump 7 is heated by the bath heat exchanger 15 and returned to the bath 13 again.
なお、上記のようなホッパ排水は、給湯を行う直前、あ
るいは給湯の終了直後、あるいは循環動作に循環ポンプ
７を運転した時などに行うことが考えられる。例えば、
循環動作時にはホッパ排水を行うのであれば、循環ポン
プ７を運転し、三方弁16をホッパ排水モードに切り替え
ると共に排水用開閉弁12を開成し、数秒間ホッパ排水を
行い、この後排水用開閉弁12を閉じ、三方弁16を循環モ
ードに切り替えて循環回路２内で湯を循環させることが
できる。もっとも、逆流防止室開閉弁11の故障等を考慮
し、水溜めホッパ９でのオーバフローを確実になくすた
めには、給湯動作の直前にホッパ排水を行うのが好まし
い。The hopper drainage as described above may be performed immediately before hot water supply, immediately after hot water supply is completed, or when the circulation pump 7 is operated for circulation operation. For example,
If hopper drainage is performed during circulation operation, the circulation pump 7 is operated, the three-way valve 16 is switched to the hopper drainage mode, the drainage on-off valve 12 is opened, and the hopper drainage is performed for several seconds, and then the drainage on-off valve. By closing 12 and switching the three-way valve 16 to the circulation mode, the hot water can be circulated in the circulation circuit 2. However, it is preferable to drain the hopper immediately before the hot water supply operation in order to surely prevent the overflow in the water storage hopper 9 in consideration of a failure of the backflow prevention chamber opening / closing valve 11 and the like.
さて、第６図に示すものは、第３図ないし第５図のよう
な構造の自動風呂釜において、自動給湯を行うためのフ
ローチャートであり、このフローでも給湯動作の直前に
ホッパ排水を行う方法を採用している。このフローを第
６図に沿って説明する。はじめに、自動スイッチがオン
に投入されると（ステップ71）、循環ポンプ７を運転し
て一定時間ホッパ排水される（ステップ72）。この後、
一定量q1（10l）の湯が浴槽13内に落とし込まれ（ステ
ップ73）、この時同時に循環回路２内のエアがパージさ
れ、ついで循環判定を行う（ステップ74）。すなわち、
循環ポンプ７を運転して循環回路２内に湯を循環させ、
流水スイッチによって残水がバスアダプターレベル以上
であるか否かが判定される（ステップ75）。この時、流
水スイッチがオンであれば、バスアダプターレベル以上
の残水があるので、所定のフロー（図示せず）が実行さ
れる。流水スイッチがオフで残水がバスアダプター14レ
ベル以下であると判断された場合には、再びホッパ排水
を実施して（ステップ76）水溜めホッパ９内を空にし、
給湯回路３からq2（90l）の湯を落とし込み（ステップ7
7）、循環ポンプ７を運転して循環判定を行う（ステッ
プ78）。この循環判定の結果、水流スイッチがオフであ
れば、排水栓の閉め忘れの恐れがあるので、その旨のメ
ッセージなどを表示する（ステップ79）。一方、水流ス
イッチがオンでバスアダプター14レベル以上の残水を確
認した後は、ホッパ排水を行った（ステップ80）後、再
び一定量q3の湯を落とし込み（ステップ81）、圧力セン
サーによってこの時の水位の上昇量ｈを検出する（ステ
ップ82）。これより浴槽13の断面積Ｓは、q3/hにより求
められる。ついで、浴槽13の底面もしくはバスアダプタ
ー14レベルを基準とする設定水位まで湯を張るために必
要な落とし込み量q4が求められる（ステップ83）。この
後、循環ポンプ７を運転してホッパ排水し（ステップ8
4）、次いで求めた湯量q4の湯を浴槽13内に落とし込み
（ステップ85）、必要に応じて追い焚きする（ステップ
86）。また、湯が冷めた時や湯量が減った場合には、保
温及び補水が行われる。Now, FIG. 6 is a flow chart for performing automatic hot water supply in the automatic bath heater having the structure shown in FIGS. 3 to 5, and in this flow as well, a method for draining the hopper immediately before the hot water supply operation is performed. Has been adopted. This flow will be described with reference to FIG. First, when the automatic switch is turned on (step 71), the circulation pump 7 is operated to drain the hopper for a certain time (step 72). After this,
A certain amount of q 1 (10 l) of hot water is dropped into the bathtub 13 (step 73), and at the same time, the air in the circulation circuit 2 is purged, and then circulation determination is performed (step 74). That is,
The circulation pump 7 is operated to circulate hot water in the circulation circuit 2,
It is determined by the running water switch whether or not the remaining water is at the level of the bus adapter or higher (step 75). At this time, if the running water switch is turned on, there is residual water above the level of the bus adapter, so a predetermined flow (not shown) is executed. When the running water switch is off and it is determined that the residual water is below the level of the bus adapter 14 level, drain the hopper again (step 76) to empty the water reservoir hopper 9.
Drop q 2 (90 liters) of hot water from the hot water supply circuit 3 (step 7
7), the circulation pump 7 is operated to determine circulation (step 78). If the water flow switch is off as a result of this circulation determination, there is a risk of forgetting to close the drain plug, so a message to that effect is displayed (step 79). Meanwhile, after the water flow switch confirms the remaining water over the bus adapter 14 level-one was subjected to hopper drainage (step 80) after the hot water of a constant amount q 3 again dropped into (step 81), this by the pressure sensor The rising amount h of the water level at that time is detected (step 82). From this, the cross-sectional area S of the bathtub 13 is obtained by q 3 / h. Next, the amount of drop q 4 required to pour hot water to the set water level based on the bottom surface of the bathtub 13 or the level of the bath adapter 14 is determined (step 83). After this, the circulation pump 7 is operated to drain the hopper (step 8
4) Next, drop the calculated amount of hot water q 4 into the bathtub 13 (step 85) and reheat it as needed (step 8).
86). Further, when the hot water has cooled or when the amount of hot water has decreased, heat retention and water replenishment are performed.
［発明の効果］ 本発明によれば、水道直結方式によって給湯回路から浴
槽へ湯を落とし込むことができるので、大流量の湯を落
とし込むことにより大型の浴槽にも短時間で湯を張るこ
とができる。また、浴槽が二階等の上階に設置されてい
る場合も、水道圧を利用して湯を上階の浴槽まで汲み上
げることができる。一方、非給湯時には逆流防止室内に
はエアが充填されているので、給湯器側と雑水回路であ
る循環回路側とが縁切りされており、逆止弁が故障した
場合にも雑水の上水側への逆流を防止することができ
る。また、給湯停止時には、逆流防止室内の湯は水溜め
ホッパ内に一時溜められるので、器外に漏水することが
なく、さらに水溜めホッパ内の水は循環回路側へ排水す
ることができるので、排水を完全に内部処理することが
できる。しかも、このホッパ排水は循環ポンプを用いて
行うことができるので、浴槽が上階に設置されていて浴
槽側から水溜めホッパ内に大きな水圧がかかっている場
合でも、確実にホッパ排水を行うことができる。従っ
て、本発明の逆流防止装置を用いた風呂釜は、浴槽が二
階等の上階に設置されている場合にも用いることがで
き、用途の制限を少なくすることができる。[Effects of the Invention] According to the present invention, since hot water can be dropped from the hot water supply circuit to the bathtub by the direct water connection system, it is possible to pour hot water into a large bathtub in a short time by dropping a large amount of hot water. . Also, when the bathtub is installed on the upper floor such as the second floor, hot water can be pumped up to the bathtub on the upper floor by using the water pressure. On the other hand, when the hot water is not supplied, the backflow prevention chamber is filled with air, so the water heater side and the circulation circuit side, which is the miscellaneous water circuit, are separated from each other. Backflow to the water side can be prevented. Also, when the hot water supply is stopped, the hot water in the backflow prevention chamber is temporarily stored in the water storage hopper, so there is no water leakage outside the device, and the water in the water storage hopper can be drained to the circulation circuit side. The wastewater can be completely treated internally. Moreover, this hopper drainage can be performed using a circulation pump, so even if a bathtub is installed on the upper floor and a large water pressure is applied to the water reservoir hopper from the bathtub side, the hopper drainage must be performed reliably. You can Therefore, the bathtub using the backflow prevention device of the present invention can be used even when the bathtub is installed on the upper floor such as the second floor, and the restrictions on its use can be reduced.
また、本発明方法によれば、給湯動作の前にホッパ排水
を行っているので、水溜めホッパ内を空にした状態で給
湯を行うことができ、給湯終了時に水溜めホッパ内で湯
がオーバフローして外部に漏水する恐れがない。Further, according to the method of the present invention, since the hopper is drained before the hot water supply operation, it is possible to perform hot water supply with the water storage hopper empty, and at the end of hot water supply, hot water overflows in the water storage hopper. There is no danger of leaking water to the outside.
第１図は本発明の逆流防止装置を用いた給湯器付き風呂
釜の概略図、第２図は同上の逆流防止装置の詳細な断面
図、第３図、第４図及び第５図はそれぞれ同上の給湯器
付き風呂釜の給湯時、ホッパ排水時及び循環時を示す動
作説明図、第６図は同上の給湯器付き風呂釜を用いた自
動給湯動作を説明するフローチャート、第７図は従来例
の概略説明図、第８図は他の従来例の概略説明図であ
る。 １…給湯器、２…循環回路 ３…給湯回路、４…落とし込み開閉弁 ５…逆流防止室、７…循環ポンプ ８…分岐水路、９…水溜めホッパ 10…大気連通口、11…逆流防止室開閉弁 12…排水用開閉弁FIG. 1 is a schematic view of a bathtub with a water heater using the backflow prevention device of the present invention, FIG. 2 is a detailed sectional view of the above-mentioned backflow prevention device, and FIGS. 3, 4, and 5 are respectively An operation explanatory view showing hot water supply, hopper drainage, and circulation of the above-described bath tub with water heater, FIG. 6 is a flow chart explaining an automatic hot water supply operation using the above bath tub with water heater, and FIG. 7 is conventional. FIG. 8 is a schematic explanatory view of an example, and FIG. 8 is a schematic explanatory view of another conventional example. DESCRIPTION OF SYMBOLS 1 ... Hot water supply device, 2 ... Circulation circuit 3 ... Hot water supply circuit, 4 ... Drop-on / off valve 5 ... Backflow prevention chamber, 7 ... Circulation pump 8 ... Branch water passage, 9 ... Water reservoir hopper 10 ... Atmosphere communication port, 11 ... Backflow prevention chamber Open / close valve 12 ... Open / close valve for drainage
Claims (2)
給湯回路に落とし込み開閉弁を設け、落とし込み開閉弁
よりも循環回路側に逆流防止室を設け、この逆流防止室
から分岐して循環回路の循環ポンプの吸込側に接続され
た分岐水路を形成し、この分岐水路に逆流防止室内の水
を溜めることのできる水溜めホッパと分岐水路を大気に
連通させる大気連通口を設け、分岐水路の大気連通口及
び水溜めホッパと逆流防止室との間に前記逆流防止室に
通水圧が加わると閉成して通水圧が無くなると開成する
逆流防止室開閉弁を設け、分岐水路の水溜めホッパの排
水側に排水用開閉弁を設けたことを特徴とする給湯器付
き風呂釜の逆流防止装置。1. A drop-on / off valve is provided in a hot water supply circuit for supplying hot water from a water heater to a bath circulation circuit, a backflow prevention chamber is provided on the circulation circuit side of the drop-on / off valve, and the circulation circuit is branched from this backflow prevention chamber. A branch water channel connected to the suction side of the circulation pump is formed, and a water reservoir hopper that can store water in the backflow prevention chamber and an atmosphere communication port that connects the branch water channel to the atmosphere are provided in this branch water channel. A backflow prevention chamber opening / closing valve is provided between the atmosphere communication port and the water storage hopper and the backflow prevention chamber, which closes when water pressure is applied to the backflow prevention chamber and opens when the water flow pressure disappears. A backflow prevention device for a bathtub with a water heater, characterized in that a drainage opening / closing valve is provided on the drainage side.
給湯回路に落とし込み開閉弁を設け、給湯回路の開閉弁
よりも循環回路側に逆流防止室を設け、この逆流防止室
から分岐して循環回路の循環ポンプの吸込側に接続され
た分岐水路を形成し、この分岐水路に逆流防止室内の水
を溜めることのできる水溜めホッパと分岐水路を大気に
連通させる大気連通口を設け、分岐水路の大気連通口及
び水溜めホッパと逆流防止室との間に前記逆流防止室に
通水圧が加わると閉成して通水圧が無くなると開成する
逆流防止室開閉弁を設け、分岐水路の水溜めホッパの排
水側に排水用開閉弁を設けた逆流防止装置において、 前記落とし込み開閉弁を閉成すると共に排水用開閉弁を
開成し、循環ポンプの吸引力によって水溜めホッパ内の
湯を風呂循環回路へ排出させ、 ついで、前記落とし込み開閉弁を開成して給湯回路から
風呂循環回路へ給湯させることを特徴とする給湯器付き
風呂釜の逆流防止装置の使用方法。2. A drop-off opening / closing valve is provided in a hot water supply circuit for supplying hot water from a hot water supply device to a bath circulation circuit, and a backflow prevention chamber is provided closer to the circulation circuit than the open / close valve of the hot water supply circuit, and is branched from this backflow prevention chamber. A branch water channel connected to the suction side of the circulation pump of the circulation circuit is formed, and a water reservoir hopper that can store water in the backflow prevention chamber and an atmosphere communication port that connects the branch water channel to the atmosphere are provided in this branch water channel. A backflow prevention chamber opening / closing valve is provided between the atmosphere communication port of the waterway and the water storage hopper and the backflow prevention chamber, which is closed when water pressure is applied to the backflow prevention chamber and is opened when the water flow pressure disappears, and the water in the branch waterway is closed. In a backflow prevention device with a drainage opening / closing valve on the drainage side of the reservoir hopper, the drop opening / closing valve is closed and the drainage opening / closing valve is opened, and the hot water in the water reservoir hopper is circulated in the bath by the suction force of the circulation pump. To the circuit A method of using a backflow prevention device for a bath tub with a water heater, which comprises discharging the water, and then opening the drop opening / closing valve to supply hot water from the hot water supply circuit to the bath circulation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1164564A JPH06103120B2 (en) | 1989-06-27 | 1989-06-27 | Backflow prevention device for bathtub with water heater and method of using the device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1164564A JPH06103120B2 (en) | 1989-06-27 | 1989-06-27 | Backflow prevention device for bathtub with water heater and method of using the device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03129248A JPH03129248A (en) | 1991-06-03 |
| JPH06103120B2 true JPH06103120B2 (en) | 1994-12-14 |
Family
ID=15795561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1164564A Expired - Fee Related JPH06103120B2 (en) | 1989-06-27 | 1989-06-27 | Backflow prevention device for bathtub with water heater and method of using the device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06103120B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0730954B2 (en) * | 1990-04-05 | 1995-04-10 | リンナイ株式会社 | Hot water filling device |
| JPH0579343U (en) * | 1992-03-16 | 1993-10-29 | ダイキン工業株式会社 | Bath system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594950B2 (en) * | 1980-01-31 | 1984-02-01 | 神鋼電機株式会社 | Regenerative chopper circuit for series-wound DC motor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594950U (en) * | 1982-06-30 | 1984-01-13 | 株式会社ノーリツ | 1-can 2-circuit circulating water heater |
| JPH0218427Y2 (en) * | 1985-01-31 | 1990-05-23 | ||
| JPS6389544U (en) * | 1986-11-28 | 1988-06-10 |
-
1989
- 1989-06-27 JP JP1164564A patent/JPH06103120B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS594950B2 (en) * | 1980-01-31 | 1984-02-01 | 神鋼電機株式会社 | Regenerative chopper circuit for series-wound DC motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03129248A (en) | 1991-06-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |