JP5804259B2 - Branch pipe with water flow sensor and water heater using the same - Google Patents

Branch pipe with water flow sensor and water heater using the same Download PDF

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JP5804259B2
JP5804259B2 JP2011183206A JP2011183206A JP5804259B2 JP 5804259 B2 JP5804259 B2 JP 5804259B2 JP 2011183206 A JP2011183206 A JP 2011183206A JP 2011183206 A JP2011183206 A JP 2011183206A JP 5804259 B2 JP5804259 B2 JP 5804259B2
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water
hot water
water flow
flow sensor
outflow
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船引 恒男
恒男 船引
小針 直人
直人 小針
濱田 誠
誠 濱田
樫原 康司
康司 樫原
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Noritz Corp
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Description

本発明は、水流センサ付き分岐管及びそれを用いた給湯器に関する。   The present invention relates to a branch pipe with a water flow sensor and a water heater using the same.

例えば下記の特許文献1には、一般給湯と風呂給湯とを切り替えて給湯することができる給湯器において、給湯器の小型化や部品点数の削減を図るために、給湯路を一般給湯路と風呂給湯路に分岐させる分岐管に、一般給湯路と風呂給湯路とを切り替える切替機能と、水量調節機能とを一体的に具備させる技術が開示されている。   For example, in Patent Document 1 below, in a water heater that can switch between general hot water supply and bath hot water supply, the hot water supply path is divided into a general hot water supply path and a bath in order to reduce the size of the water heater and reduce the number of parts. A technique is disclosed in which a branch pipe that branches into a hot water supply path is integrally provided with a switching function for switching between a general hot water supply path and a bath hot water supply path and a water amount adjustment function.

一方、下記の特許文献2には、三叉路を形成するケーシングの第1管状部を給水管に接続し、該第1管状部内に、通過する水の流れにより回転して水量を検出する水流センサ(水量検出用羽根車)を配設することにより、部品点数の削減や小型化を図る技術が開示されている。なお、特許文献2記載の発明では、水流センサが配設された第1管状部は給水路に接続された入水管部となっている。   On the other hand, in Patent Document 2 below, a water flow sensor that detects the amount of water by connecting a first tubular portion of a casing forming a three-way to a water supply pipe and rotating in the first tubular portion by the flow of passing water ( A technique for reducing the number of parts and reducing the size by disposing a water amount detection impeller) is disclosed. In the invention described in Patent Document 2, the first tubular portion provided with the water flow sensor is a water inlet pipe portion connected to the water supply channel.

特開2000−65427号公報JP 2000-65427 A 特開2000−55465号公報JP 2000-55465 A

上記特許文献1記載の技術では、分岐管自体に切替弁の機能を具備させているが、一般給湯路側は蛇口の給湯栓により開閉可能であるため、一般給湯路側の開閉弁は省略可能である。一方、風呂注湯中に使用者が一般給湯用の給湯栓を開閉した場合に、使用者の使い勝手を考慮して注湯動作よりも一般給湯を優先するなどの各種制御を行えるようにするために、特許文献1記載の水量調節切替弁の一般給湯開閉弁に代えて、特許文献2記載の水流センサを配置したい場合がある。   In the technique described in Patent Document 1, the branch pipe itself has a function of a switching valve. However, since the general hot water supply channel side can be opened and closed by a faucet hot water tap, the open / close valve on the general hot water supply channel side can be omitted. . On the other hand, when a user opens and closes a hot water tap for hot water supply during bath pouring, various controls such as giving priority to general hot water over pouring operation in consideration of user convenience In addition, instead of the general hot water supply opening / closing valve of the water amount adjustment switching valve described in Patent Document 1, it may be desired to arrange the water flow sensor described in Patent Document 2.

しかし、分岐管のコンパクト化により管路が狭小となったり水流センサが弁装置などに近接配置されていたりすると、注湯動作中に一般給湯用の給湯栓が開かれていないにもかかわらず、風呂給湯路側への水流の影響により水流センサが動作し、実際には一般給湯路への水流が無いのに水流有りと誤検知するおそれがある。このような誤検知が発生すると、その度に風呂への注湯動作が停止制御されてしまうという不具合がある。   However, if the pipe is narrowed due to the compactness of the branch pipe or the water flow sensor is placed close to the valve device etc., the hot water tap for general hot water supply is not opened during the pouring operation, The water flow sensor operates due to the influence of the water flow to the bath hot water supply side, and there is a possibility that the water flow is erroneously detected even though there is actually no water flow to the general hot water supply passage. When such erroneous detection occurs, there is a problem that the hot water pouring operation to the bath is stopped and controlled each time.

そこで本発明は、流出管部に水流センサを内蔵する分岐管において、水流センサの誤検知の発生を抑制することを目的とする。   Therefore, an object of the present invention is to suppress the occurrence of erroneous detection of a water flow sensor in a branch pipe having a water flow sensor built in an outflow pipe portion.

上記目的を達成するために、本発明は、次の技術的手段を講じた。   In order to achieve the above object, the present invention takes the following technical means.

すなわち、本発明の水流センサ付き分岐管は、湯水が流入する流入管部と、該流入管部に流入した湯水を二方向へ流出させる第一及び第二の流出管部とを備え、第一の流出管部内に、第一の流出管部からの湯水の流出の有無を検知するための水流センサが配設されているとともに、第一の流出管部からの湯水の流出が無く且つ第二の流出管部から湯水が流出するときに前記水流センサを作動させる水流が第一の流出管部内に発生することを抑制する水流抑制部が前記水流センサの上流側に設けられており、前記水流抑制部は筒状であるとともにその上流側端部が先細り状に形成されていることを特徴とするものである(請求項1)。 That is, the branch pipe with a water flow sensor according to the present invention includes an inflow pipe portion into which hot water flows, and first and second outflow pipe portions for flowing out the hot water flowing into the inflow pipe portion in two directions. In the outflow pipe portion, a water flow sensor for detecting the presence or absence of outflow of hot water from the first outflow pipe portion is disposed, and there is no outflow of hot water from the first outflow pipe portion and the water flow to operate the water flow sensor has suppressing flow suppressing unit that generated in the first outflow pipe section being provided on at upstream side of the water flow sensor, the water flow when the hot water outflow from the outlet pipe portion of the The suppressing portion is cylindrical and has an upstream end formed in a tapered shape (claim 1).

かかる本発明の水流センサ付き分岐管によれば、流入管部に流入する湯水を、第一及び第二の流出管部のいずれかに選択的に、若しくは、両流出管部に同時に分岐させて流出させることができる。いずれかの流出管部に選択的に切り替えて湯水を流出させるには、分岐管自体に弁装置を内蔵してもよく、また、分岐管とは別体の弁装置や栓機構を給湯配管の適宜箇所に配設してもよい。本発明の分岐管では、特に、第一の流出管部からの湯水の流出が無く且つ第二の流出管部から湯水が流出するときに前記水流センサを作動させるような水流が第一の流出管部内に発生することを抑制する水流抑制部を前記水流センサの上流側に設けたので、第一の流出管部からの湯水の流出が無いにもかかわらず水流センサが水流有りと誤検知することが抑制され、該水流センサの検知信号に基づく各種制御に支障を来たすことが抑制される。さらに、前記水流抑制部は筒状であるとともにその上流側端部が先細り状に形成されている構成となされているので、流入管部から第二の流出管部に流れる水流によって、例えば第一の流出管部の上流側端部近傍で第一の流出管部の内面近傍に沿う渦流乃至乱流が生じてしまうような場合において、先細り筒状の水流抑制部によって第一の流出管部の内面近傍に沿う渦流乃至乱流を抑止し、これにより水流センサが水流有りと誤検知することを抑止させることができる。 According to the branch pipe with a water flow sensor of the present invention, hot water flowing into the inflow pipe section is selectively branched to either the first or second outflow pipe section or simultaneously into both outflow pipe sections. Can be drained. To selectively switch to one of the outflow pipes to allow hot water to flow out, a valve device may be built in the branch pipe itself, or a valve device or a plug mechanism separate from the branch pipe may be installed in the hot water supply pipe. You may arrange | position in a suitable place. In the branch pipe of the present invention, in particular, there is no water flow that operates the water flow sensor when there is no outflow of hot water from the first outflow pipe portion and hot water flows out from the second outflow pipe portion. Since the water flow suppression part that suppresses the occurrence in the pipe part is provided on the upstream side of the water flow sensor, the water flow sensor erroneously detects that there is water flow even though there is no outflow of hot water from the first outflow pipe part. It is suppressed, and it is suppressed that the various control based on the detection signal of this water flow sensor interferes. Furthermore, since the water flow suppressing portion is formed in a cylindrical shape and the upstream end thereof is tapered, the water flow flowing from the inflow pipe portion to the second outflow pipe portion is, for example, the first In the case where a vortex or turbulent flow along the vicinity of the inner surface of the first outflow pipe portion is generated in the vicinity of the upstream end portion of the outflow pipe portion of the first outflow pipe portion, Swirl or turbulent flow along the vicinity of the inner surface can be suppressed, thereby preventing the water flow sensor from erroneously detecting the presence of water flow.

なお、水流センサとしては、永久磁石付きロータの回転数を磁気センサで検知する水量センサを用いることができ、該水量センサの検知信号が所定の閾値を超える場合に水流有りとして検出作動する構成とすることができる(請求項3)。ロータは、第一の流出管部内に配設される羽根車を一体に備えることができる。 As the water flow sensor, a water amount sensor that detects the rotation speed of the rotor with a permanent magnet with a magnetic sensor can be used, and when the detection signal of the water amount sensor exceeds a predetermined threshold, the water flow sensor is detected and operated. (Claim 3) . The rotor can be integrally provided with an impeller disposed in the first outflow pipe portion.

上記本発明の水流センサ付き分岐管において、第1の流出管部は流入管部に対して軸方向に交差するように接続されており、前記水流抑制部が、第一の流出管部の上流端入水口から流入管部の径方向内方に向けて突出形成されている構成とすることができる(請求項2)。これによれば、流入管部における湯水の流れが管内面に沿った部分で比較的流速の速いような場合、例えば、流入管部自体がエルボ状に屈曲していたり、流入管部に流量調整弁が内蔵されていることにより流入管部の内面近傍で速い層流が生じているような場合に、流入管部の径方向内方に突出する水流抑制部によって上記のような速い流れを緩和し、これにより水流センサが水流有りと誤検知することを抑止させることができる。   In the branch pipe with a water flow sensor of the present invention, the first outflow pipe section is connected to the inflow pipe section so as to intersect the axial direction, and the water flow suppression section is located upstream of the first outflow pipe section. It can be set as the structure currently protruded and formed toward the inward radial direction of an inflow pipe part from an end water inlet (Claim 2). According to this, when the flow rate of hot water in the inflow pipe portion is relatively high at the portion along the inner surface of the pipe, for example, the inflow pipe portion itself is bent in an elbow shape or the flow rate is adjusted in the inflow pipe portion. When a fast laminar flow is generated near the inner surface of the inflow pipe due to the built-in valve, the above-mentioned rapid flow is alleviated by the water flow restraint that protrudes radially inward of the inflow pipe. Thus, it is possible to prevent the water flow sensor from erroneously detecting that there is a water flow.

上記本発明は、前記流入管部内には流入管部に流入する湯水の流量を調整する流量調整弁が配設されている場合に特に好適に実施できる(請求項4)。すなわち、流量調整弁は流路開口面積を絞ることにより流量調整を行うため、該流量調整弁の下流側では流入管部の内周面と流量調整弁の弁体の外周面との間の狭い開口を通過する速い水流が流入管部の内周面近傍に生じさせられるが、本発明によれば流量調整弁を通過する流入管部の内周面に沿う速い水流を水流抑制部によって抑止することにより、水流センサの誤検知を抑止することができる。   The present invention can be particularly preferably implemented when a flow rate adjusting valve for adjusting the flow rate of hot water flowing into the inflow pipe portion is provided in the inflow pipe portion. In other words, since the flow rate adjusting valve adjusts the flow rate by reducing the flow path opening area, the downstream side of the flow rate adjusting valve is narrow between the inner peripheral surface of the inflow pipe portion and the outer peripheral surface of the valve body of the flow rate adjusting valve. A fast water flow passing through the opening is generated in the vicinity of the inner peripheral surface of the inflow pipe portion, but according to the present invention, a fast water flow along the inner peripheral surface of the inflow pipe portion passing through the flow rate adjusting valve is suppressed by the water flow suppressing portion. As a result, erroneous detection of the water flow sensor can be suppressed.

また、前記第二の流出管部の開閉を行う開閉弁が第二の流出管部に設けられているものとすることができる(請求項5)。より好ましくは、開閉弁は、電磁開閉弁とするのが良い。これによれば、第一の流出管部に接続される第一の給湯路の給湯栓が開かれることにより水流センサが水流有りを検出する場合に、電子制御装置によって開閉弁を閉制御することにより第一の流出管部に優先的に湯水を流出させることができる。一方、第一の給湯路の一般用給湯栓が閉じているときには、水流センサの誤検知を抑止して、第二の流出管部に湯水を連続供給することが可能になる。   Moreover, the on-off valve which opens and closes said 2nd outflow pipe part can be provided in the 2nd outflow pipe part (Claim 5). More preferably, the on-off valve is an electromagnetic on-off valve. According to this, when the water flow sensor detects the presence of a water flow by opening the hot water tap of the first water supply path connected to the first outflow pipe portion, the electronic control device controls the closing of the on-off valve. Thus, hot water can be preferentially discharged to the first outflow pipe portion. On the other hand, when the general hot water tap of the first hot water supply passage is closed, erroneous detection of the water flow sensor can be suppressed and hot water can be continuously supplied to the second outflow pipe portion.

また、本発明は、燃焼バーナと、燃焼バーナの燃焼作動により生じる燃焼ガスを受けて加熱される管路を備えた熱交換器と、この熱交換器の管路に入水させる入水路と、この入水路からの入水が上記熱交換器で熱交換加熱された後に出湯される出湯路と、上記熱交換器をバイパスするように上記入水路から分岐されて上記出湯路に合流するバイパス路と、電子制御装置とを備える給湯器において、前記バイパス路の合流部よりも下流側で前記出湯路に上記本発明の水流センサ付き分岐管の流入管部が接続され、該分岐管の第一の流出管部に第一の給湯路が接続され、分岐管の第二の流出管部に第二の給湯路が接続され、前記水流センサと前記開閉弁とが前記電子制御装置に接続され、前記電子制御装置は、水流センサが水流有りを検知したときに前記開閉弁を閉制御するように構成されているものとすることができる(請求項6)。   The present invention also includes a combustion burner, a heat exchanger having a pipe that is heated by receiving combustion gas generated by the combustion operation of the combustion burner, a water inlet that allows water to enter the pipe of the heat exchanger, A hot water outlet from which the incoming water from the incoming water passage is heat-exchanged and heated by the heat exchanger, a bypass passage that branches off from the incoming water passage so as to bypass the heat exchanger, and joins the outlet water passage; In the water heater provided with the electronic control device, the inflow pipe portion of the branch pipe with a water flow sensor of the present invention is connected to the hot water outlet on the downstream side of the junction section of the bypass path, and the first outflow of the branch pipe A first hot water supply path is connected to the pipe part, a second hot water supply path is connected to the second outflow pipe part of the branch pipe, the water flow sensor and the on-off valve are connected to the electronic control unit, and the electronic When the water flow sensor detects the presence of water flow, The on-off valve can be assumed to be configured to close the control to (claim 6).

かかる本発明の給湯器によれば、出湯路で設定された湯温に調整された湯水を分岐管に流入させ、該湯水を第一の給湯路と第二の給湯路に分岐して供給することができる。第一の給湯路には好ましくは分岐管とは別体の給湯栓や開閉弁を設けておき、第一の給湯路の給湯栓又は開閉弁が開かれて第一の給湯路に湯水が供給されるときには、これを水流センサにより検出して電子制御装置により第二の流出管部の開閉弁を閉制御することにより、第二の給湯路への給湯制御中であっても第一の給湯路に優先して給湯を行わせることができる。一方、第一の給湯路の給湯栓又は開閉弁が閉じているときには、水流センサの誤検知を抑止して、第二の給湯路に湯水を連続供給することが可能になる。   According to such a water heater of the present invention, hot water adjusted to the hot water temperature set in the hot water supply channel is caused to flow into the branch pipe, and the hot water is branched and supplied to the first hot water supply channel and the second hot water supply channel. be able to. The first hot water supply path is preferably provided with a hot water tap or on / off valve separate from the branch pipe, and the hot water tap or on / off valve of the first hot water supply path is opened to supply hot water to the first hot water supply path. When this is done, the first hot water supply is detected even during the hot water supply control to the second hot water supply path by detecting this with a water flow sensor and closing the open / close valve of the second outflow pipe section by the electronic control unit. Hot water can be given priority over the road. On the other hand, when the hot water tap or the on-off valve of the first hot water supply passage is closed, erroneous detection of the water flow sensor can be suppressed and hot water can be continuously supplied to the second hot water supply passage.

以上説明したように、本発明の請求項1に係る水流センサ付き分岐管によれば、配管構成のコンパクト化や部品点数の削減を図りつつも、第一の流出管部からの湯水の流出が無く且つ第二の流出管部から湯水が流出するときに前記水流センサを作動させるような水流が第一の流出管部内に発生することを抑制する水流抑制部を前記水流センサの上流側に設けたので、第一の流出管部からの湯水の流出が無いにもかかわらず水流センサが水流有りと誤検知することが抑制され、該水流センサの検知信号に基づく各種制御に支障を来たすことを抑制できる。さらに、前記水流抑制部は筒状であるとともにその上流側端部が先細り状に形成されている構成となされているので、流入管部から第二の流出管部に流れる水流によって、例えば第一の流出管部の上流側端部近傍で第一の流出管部の内面近傍に沿う渦流乃至乱流が生じてしまうような場合において、先細り筒状の水流抑制部によって第一の流出管部の内面近傍に沿う渦流乃至乱流を抑止し、これにより水流センサが水流有りと誤検知することを抑止させることができる。 As described above, according to the branch pipe with a water flow sensor according to claim 1 of the present invention, the outflow of hot water from the first outflow pipe portion can be achieved while reducing the size of the piping configuration and the number of parts. There is no water flow suppression unit on the upstream side of the water flow sensor that suppresses the generation of a water flow in the first outflow pipe portion that activates the water flow sensor when hot water flows out from the second outflow pipe portion. Therefore, it is possible to prevent the water flow sensor from erroneously detecting that there is a water flow even though there is no outflow of hot water from the first outflow pipe section, and to hinder various controls based on the detection signal of the water flow sensor. Can be suppressed. Furthermore, since the water flow suppressing portion is formed in a cylindrical shape and the upstream end thereof is tapered, the water flow flowing from the inflow pipe portion to the second outflow pipe portion is, for example, the first In the case where a vortex or turbulent flow along the vicinity of the inner surface of the first outflow pipe portion is generated in the vicinity of the upstream end portion of the outflow pipe portion of the first outflow pipe portion, Swirl or turbulent flow along the vicinity of the inner surface can be suppressed, thereby preventing the water flow sensor from erroneously detecting the presence of water flow.

また、本発明の請求項2に係る水流センサ付き分岐管によれば、流入管部における湯水の流れが管内面に沿った部分で比較的流速の速いような場合、例えば、流入管部自体がエルボ状に屈曲していたり、流入管部に流量調整弁が内蔵されていることにより流入管部の内面近傍で速い層流が生じているような場合に、流入管部の径方向内方に突出する水流抑制部によって上記のような速い流れを緩和し、これにより水流センサが水流有りと誤検知することを抑止させることができる。   Further, according to the branch pipe with a water flow sensor according to claim 2 of the present invention, when the flow of hot water in the inflow pipe portion is relatively fast at the portion along the pipe inner surface, for example, the inflow pipe portion itself is In the case where a fast laminar flow is generated near the inner surface of the inflow pipe due to bending in an elbow or a flow control valve is built in the inflow pipe, The projecting water flow restraining part can relieve such a fast flow, thereby preventing the water flow sensor from erroneously detecting that there is a water flow.

また、本発明の請求項4に係る水流センサ付き分岐管によれば、流量調整弁を通過する流入管部の内周面に沿う速い水流を水流抑制部によって抑止することにより、水流センサの誤検知を抑止することができる。   Further, according to the branch pipe with a water flow sensor according to claim 4 of the present invention, the water flow control unit suppresses a rapid water flow along the inner peripheral surface of the inflow pipe portion that passes through the flow rate adjusting valve, so that an error of the water flow sensor occurs. Detection can be suppressed.

また、本発明の請求項5に係る水流センサ付き分岐管によれば、第一の流出管部に接続される第一の給湯路の給湯栓が開かれることにより水流センサが水流有りを検出する場合に、電子制御装置によって開閉弁を閉制御することにより第一の流出管部に優先的に湯水を流出させることができる。一方、第一の給湯路の給湯栓が閉じているときには、水流センサの誤検知を抑止して、第二の流出管部に湯水を連続供給することが可能になる。   According to the branch pipe with a water flow sensor according to claim 5 of the present invention, the water flow sensor detects the presence of water flow by opening the hot water tap of the first hot water supply path connected to the first outflow pipe portion. In this case, hot water can be preferentially discharged to the first outflow pipe portion by controlling the on-off valve to be closed by the electronic control unit. On the other hand, when the hot water tap of the first hot water supply passage is closed, it is possible to suppress erroneous detection of the water flow sensor and continuously supply hot water to the second outflow pipe portion.

また、本発明の請求項6に係る給湯器によれば、出湯路で設定された湯温に調整された湯水を分岐管に流入させ、該湯水を第一の給湯路と第二の給湯路に分岐して供給することができる。第一の給湯路には好ましくは分岐管とは別体の給湯栓や開閉弁を設けておき、第一の給湯路の給湯栓又は開閉弁が開かれて第一の給湯路に湯水が供給されるときには、これを水流センサにより検出して電子制御装置により第二の流出管部の開閉弁を閉制御することにより、第二の給湯路への給湯制御中であっても第一の給湯路に優先して給湯を行わせることができる。一方、第一の給湯路の給湯栓又は開閉弁が閉じているときには、水流センサの誤検知を抑止して、第二の給湯路に湯水を連続供給することが可能になる。   Moreover, according to the hot water supply device according to claim 6 of the present invention, the hot water adjusted to the hot water temperature set in the hot water supply channel is caused to flow into the branch pipe, and the hot water is supplied to the first hot water supply channel and the second hot water supply channel. Can be branched and supplied. The first hot water supply path is preferably provided with a hot water tap or on / off valve separate from the branch pipe, and the hot water tap or on / off valve of the first hot water supply path is opened to supply hot water to the first hot water supply path. When this is done, the first hot water supply is detected even during the hot water supply control to the second hot water supply path by detecting this with a water flow sensor and closing the open / close valve of the second outflow pipe section by the electronic control unit. Hot water can be given priority over the road. On the other hand, when the hot water tap or the on-off valve of the first hot water supply passage is closed, erroneous detection of the water flow sensor can be suppressed and hot water can be continuously supplied to the second hot water supply passage.

本発明の第1の実施形態に係る水流センサ付き分岐管の全体縦断面図である。It is a whole longitudinal section of a branch pipe with a water flow sensor concerning a 1st embodiment of the present invention. 同分岐管の要部拡大断面図である。It is a principal part expanded sectional view of the same branch pipe. 同分岐管の全体斜視図である。It is a whole perspective view of the same branch pipe. 同分岐管の水流センサ及び水流抑制部の拡大分解斜視図である。It is an expansion exploded perspective view of the water flow sensor and water flow control part of the branch pipe. 同分岐管を備える給湯器の回路図である。It is a circuit diagram of a water heater provided with the same branch pipe. 本発明の第2の実施形態に係る水流センサ付き分岐管の要部拡大断面図である。It is a principal part expanded sectional view of the branch pipe with a water flow sensor which concerns on the 2nd Embodiment of this invention. 本発明の第3の実施形態に係る水流センサ付き分岐管の要部拡大断面図である。It is a principal part expanded sectional view of the branch pipe with a water flow sensor which concerns on the 3rd Embodiment of this invention. 本発明の第4の実施形態に係る水流センサ付き分岐管の要部拡大断面図である。It is a principal part expanded sectional view of the branch pipe with a water flow sensor which concerns on the 4th Embodiment of this invention. 本発明の第5の実施形態に係る水流センサ付き分岐管の要部拡大断面図である。It is a principal part expanded sectional view of the branch pipe with a water flow sensor which concerns on the 5th Embodiment of this invention.

以下、本発明の好適な実施形態を図面に基づいて説明する。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

図1〜4は本発明の第1の実施形態に係る水流センサ付き分岐管1を示し、図5は分岐管1を具備する給湯器Bの全体構成を概略的に示している。   1-4 shows the branch pipe 1 with a water flow sensor according to the first embodiment of the present invention, and FIG. 5 schematically shows the entire configuration of a water heater B provided with the branch pipe 1.

まず、給湯器Bの全体構成を図5を参照しつつ説明すると、この給湯器Bは、水道管等が接続される接続アダプタ2aが上流端に設けられた入水路2と、該入水路2から水が導入される熱交換器3と、熱交換器3に導入された水を熱交換加熱するための燃焼ガスを発生させる燃焼バーナ4と、加熱後の湯水を熱交換器から出湯するための出湯路5と、該出湯路5の下流端に接続される分岐管1と、分岐管1に接続される風呂用給湯路6(第二給湯路)及び一般給湯路7(第一給湯路)と、各給湯路6,7の下流端に設けられた接続アダプタ6a,7aとを備え、これら各構成部品が給湯器ケーシング(図示せず)内に配設されている。風呂給湯用接続アダプタ6aには給湯器ケーシング外に延びる風呂給湯配管61が接続され、一般給湯路接続アダプタ7aには給湯器ケーシング外に延びる一般給湯配管71が接続されて、これら各配管61,71に湯水を分岐して給湯可能に構成されている。一般給湯配管71の下流端には給湯栓72が設けられ、一般給湯配管71への湯水の供給及び停止は給湯栓72を使用者が手作業で開閉することにより行われる。   First, the overall configuration of the water heater B will be described with reference to FIG. 5. The water heater B includes a water inlet 2 provided with a connection adapter 2 a to which a water pipe or the like is connected at the upstream end, and the water inlet 2. A heat exchanger 3 into which water is introduced, a combustion burner 4 for generating combustion gas for heat exchange heating of the water introduced into the heat exchanger 3, and hot water after heating from the heat exchanger Hot water supply path 5, branch pipe 1 connected to the downstream end of the hot water supply path 5, bath hot water supply path 6 (second hot water supply path) and general hot water supply path 7 (first hot water supply path) connected to the branch pipe 1 ) And connection adapters 6a and 7a provided at the downstream ends of the hot water supply passages 6 and 7, respectively. These components are disposed in a hot water heater casing (not shown). The bath hot water connection adapter 6a is connected to a bath hot water pipe 61 extending outside the water heater casing, and the general hot water path connection adapter 7a is connected to a general hot water pipe 71 extending outside the water heater casing. The hot water is branched into 71 so that hot water can be supplied. A hot-water tap 72 is provided at the downstream end of the general hot-water supply pipe 71. Supply and stop of hot water to the general hot-water supply pipe 71 are performed by a user manually opening and closing the hot-water tap 72.

上記入水路2の中途部と出湯路5の中途部との間には、上記熱交換器3をバイパスして出湯路5に冷水を供給して熱交換器3から出湯路5に出湯される湯に水を混合させるためのバイパス路8が設けられている。このバイパス路8には出湯路5への通水流量を調整するバイパス流量調整弁81が介装され、バイパス流量調整弁81の弁体の位置制御による開度調整により、熱交換器3から出湯路5に出湯される湯に対する水の混合比が変更調整されて設定給湯温度に温度調整されるようになっている。   Between the middle part of the water inlet channel 2 and the middle part of the hot water channel 5, the heat exchanger 3 is bypassed, cold water is supplied to the hot water channel 5, and the hot water is discharged from the heat exchanger 3 to the hot water channel 5. A bypass path 8 for mixing water with hot water is provided. This bypass passage 8 is provided with a bypass flow rate adjustment valve 81 that adjusts the flow rate of water flow to the hot water discharge passage 5, and the amount of hot water discharged from the heat exchanger 3 is adjusted by adjusting the opening degree by controlling the position of the valve body of the bypass flow rate adjustment valve 81. The mixing ratio of the water to the hot water discharged to the passage 5 is changed and adjusted to adjust the temperature to the set hot water supply temperature.

上記熱交換器3及び燃焼バーナ4は缶体9内に配設され、燃焼バーナ4の燃焼動作によりその上部空間の燃焼室に向けて燃焼されると、その燃焼ガスが上方に流れる間に熱交換器3を加熱し、これにより、内部を通過する水が熱交換加熱されるようになっている。そして、熱交換加熱後の燃焼排ガスが排出口9aから外部に排気されるようになっている。なお、缶体9には、立消え安全装置91、点火プラグ92、点火装置93、過熱防止装置94が付設されている。   When the heat exchanger 3 and the combustion burner 4 are disposed in the can 9 and burned toward the combustion chamber in the upper space by the combustion operation of the combustion burner 4, the heat is generated while the combustion gas flows upward. The exchanger 3 is heated, so that the water passing through the inside is heated by heat exchange. And the combustion exhaust gas after heat exchange heating is exhausted outside from the discharge port 9a. The can body 9 is provided with a safety device 91 for extinction, a spark plug 92, an ignition device 93, and an overheat prevention device 94.

燃焼バーナ4は、元ガス電磁弁41やガス比例電磁弁42を介装した燃料供給系からの燃料ガスの供給と、回転数センサ43aが付設された燃焼ファン43からの燃焼用空気の供給とを受けて燃焼作動するようになっており、複数のバーナ部に対して能力切替ガス電磁弁44による燃料ガスの供給切換制御によって燃焼能力が複数段階に切換可能となっている。   The combustion burner 4 is configured to supply a fuel gas from a fuel supply system provided with an original gas solenoid valve 41 and a gas proportional solenoid valve 42, and supply combustion air from a combustion fan 43 provided with a rotation speed sensor 43a. The combustion capacity can be switched to a plurality of stages by the fuel gas supply switching control by the capacity switching gas solenoid valve 44 for the plurality of burner portions.

上記入水路2には、入水流量センサ21や入水温度センサ22が配設されており、接続アダプタ2aにはフィルター23や水抜き栓24が設けられている。上記出湯路5には、上記缶体9の近傍位置であって上記熱交換器3の出口から出湯された直後の湯の温度である出口温度(缶体温度)を検出する缶体温度センサ51と、バイパス路7からの水の逆流を防止する逆止弁52とが設けられている。分岐管1には、バイパス路7からの水による温調後の給湯温度を検出する給湯温度センサ10が設けられている。風呂給湯路6にはバキュームブレーカー62が設けられている。一般給湯路7には過圧防止安全装置73が設けられている。   The water inlet 2 is provided with an incoming water flow rate sensor 21 and an incoming water temperature sensor 22, and the connection adapter 2 a is provided with a filter 23 and a drain plug 24. A can body temperature sensor 51 that detects an outlet temperature (can body temperature) that is a position of the hot water just after the hot water is discharged from the outlet of the heat exchanger 3 at a position in the vicinity of the can body 9. And a check valve 52 for preventing the backflow of water from the bypass 7. The branch pipe 1 is provided with a hot water supply temperature sensor 10 that detects a hot water supply temperature after temperature adjustment by water from the bypass passage 7. A vacuum breaker 62 is provided in the bath hot water supply path 6. The general hot water supply passage 7 is provided with an overpressure prevention safety device 73.

また、本実施例の給湯器Bでは、出湯路5から直接、熱交換器3から出湯された直後の高温の湯を風呂給湯路6に供給するための高温差し湯バイパス路53が、出湯路5と風呂給湯路6との間に設けられている。該バイパス路53には差し湯水量調整弁53aが設けられている。   Further, in the water heater B of the present embodiment, the hot water hot water bypass passage 53 for supplying the hot water immediately after being discharged from the heat exchanger 3 to the bath hot water passage 6 is provided directly from the hot water outlet 5. 5 and the bath hot water supply path 6. The bypass passage 53 is provided with a hot water amount adjustment valve 53a.

上記の各電磁弁や電気機器は、電子制御装置C(コントローラ)により制御され、予め定められた制御内容に応じて給湯制御を行うように構成されている。   Each of the above-described electromagnetic valves and electrical devices are controlled by an electronic control device C (controller) and configured to perform hot water supply control according to predetermined control contents.

次に、分岐管1の各実施形態について詳細に説明する。   Next, each embodiment of the branch pipe 1 will be described in detail.

図1〜図4は本発明の第1の実施形態に係る分岐管1を示しており、該分岐管1は、湯水が流入する流入管部11と、該流入管部11に流入した湯水を二方向へ流出させる第一及び第二の流出管部12,13とを一体的に備えている。第一の流出管部12は流入管部11に対して軸方向に直交するように接続されており、該第一の流出管部12の上流端入水口は流入管部11の内部空間に開口されている。第二の流出管部13も同様に、流入管部11に対して軸方向に直交するように接続されており、該第二の流出管部13の上流端入水口は流入管部11の内部空間に開口されている。第一及び第二の流出管部12,13は同心状に直線的に配設されており、これにより分岐管1は略T字管状に構成されている。   1 to 4 show a branch pipe 1 according to a first embodiment of the present invention. The branch pipe 1 includes an inflow pipe portion 11 into which hot water flows and a hot water flowing into the inflow pipe portion 11. First and second outflow pipe portions 12 and 13 for flowing out in two directions are integrally provided. The first outflow pipe portion 12 is connected to the inflow pipe portion 11 so as to be orthogonal to the axial direction, and the upstream end water inlet of the first outflow pipe portion 12 opens into the internal space of the inflow pipe portion 11. Has been. Similarly, the second outflow pipe portion 13 is connected to the inflow pipe portion 11 so as to be orthogonal to the axial direction, and the upstream end water inlet of the second outflow pipe portion 13 is the interior of the inflow pipe portion 11. Open to the space. The 1st and 2nd outflow pipe parts 12 and 13 are arrange | positioned linearly concentrically, and, thereby, the branch pipe 1 is comprised by the substantially T-shaped tube shape.

なお、上記給湯器Bにおいては、分岐管1の流入管部11は出湯路5の下流端に接続され、第一の流出管部12は一般給湯路7の上流端に接続され、第二の流出管部13は風呂給湯路6の上流端に接続されている。   In the water heater B, the inflow pipe portion 11 of the branch pipe 1 is connected to the downstream end of the hot water supply passage 5, the first outflow pipe portion 12 is connected to the upstream end of the general hot water supply passage 7, and the second The outflow pipe portion 13 is connected to the upstream end of the bath hot water supply path 6.

上記流入管部11内には、流入管部11に流入する湯水の流量を調整する流量調整弁14が配設されており、上記給湯温度センサ10は、流入管部11の周壁部に取付けられている。流量調整弁14は、流入管部11の軸方向中途部に設けられた小径の絞り部11aに対して軸方向に近接・離反可能に配設された弁体14aと、該弁体14aに取付け固定されるプランジャロッド14bと、該プランジャロッド14bの基部を軸方向摺動自在に保持する保持筒14cと、プランジャロッド14bの先端部を軸方向摺動自在に保持する軸支部14dとを備え、プランジャロッド14bはステッピングモータ14eによって軸方向に往復駆動されるようになっており、これにより絞り部11aに対する弁体14aの軸方向位置を制御して開度調整し、流通する水量調整を行えるようになっている。   A flow rate adjusting valve 14 for adjusting the flow rate of hot water flowing into the inflow pipe portion 11 is disposed in the inflow pipe portion 11, and the hot water temperature sensor 10 is attached to the peripheral wall portion of the inflow pipe portion 11. ing. The flow rate adjusting valve 14 is attached to the valve body 14a, and a valve body 14a disposed in the axial direction so as to be able to approach and leave the small-diameter throttle portion 11a provided in the axially middle part of the inflow pipe portion 11. A fixed plunger rod 14b, a holding cylinder 14c for holding the base portion of the plunger rod 14b slidably in the axial direction, and a shaft support portion 14d for holding the tip end portion of the plunger rod 14b slidably in the axial direction; The plunger rod 14b is driven to reciprocate in the axial direction by a stepping motor 14e, thereby controlling the axial position of the valve body 14a with respect to the throttle portion 11a to adjust the opening, so that the amount of water flowing can be adjusted. It has become.

第二の流出管部13には、第二の流出管部13の流路の開閉を行う開閉弁16が設けられている。この開閉弁16は、外周側空間が流入管部11の内部空間と連通し且つ内周側空間が第二の流出管部13の下流端開口に連通する円筒状の弁座16aと、ソレノイド16bによって弁座16aを開閉する弁体16cとを備えている。   The second outflow pipe portion 13 is provided with an on-off valve 16 that opens and closes the flow path of the second outflow pipe portion 13. The on-off valve 16 includes a cylindrical valve seat 16a in which the outer space communicates with the inner space of the inflow pipe portion 11, and the inner space communicates with the downstream end opening of the second outflow tube portion 13, and a solenoid 16b. And a valve body 16c for opening and closing the valve seat 16a.

第一の流出管部12の上流端入水口は、流量調整弁14の弁体14aの下流側近傍で流入管部11の内部空間に開口されており、これによりコンパクト化を図っている。第一の流出管部12内には、第一の流出管部12から一般給湯路7への湯水の流出の有無を検知するための水流センサ17が配設されているとともに、第一の流出管部12から一般給湯路7への湯水の流出が無く且つ第二の流出管部13から風呂給湯路7へ湯水が流出するときに水流センサ17を作動させる水流が第一の流出管部12内に発生することを抑制する水流抑制部18が水流センサ17の上流側に設けられている。   The upstream end water inlet of the first outflow pipe portion 12 is opened in the internal space of the inflow pipe portion 11 in the vicinity of the downstream side of the valve body 14a of the flow rate adjusting valve 14, thereby achieving compactness. In the first outflow pipe section 12, a water flow sensor 17 for detecting the presence or absence of outflow of hot water from the first outflow pipe section 12 to the general hot water supply passage 7 is disposed, and the first outflow pipe section 12 is provided. When there is no outflow of hot water from the pipe section 12 to the general hot water supply path 7 and hot water flows out from the second outflow pipe section 13 to the bath hot water supply path 7, the water flow that operates the water flow sensor 17 is the first outflow pipe section 12. A water flow suppression unit 18 that suppresses the occurrence of the water flow is provided on the upstream side of the water flow sensor 17.

水流センサ17は、羽根車として機能するロータ17aを備えている。該ロータ17aは、第一の流出管部12を湯水が流通する際に該湯水によって回転するように構成されている。ロータ17aには軸部17bが上流側及び下流側に突設され、上流側軸支部17c及び下流側軸支部17dによって回転自在に軸支されている。ロータ17aは全体が永久磁石に構成されるか或いは周方向一部に永久磁石が取付けられ、第一の流出管部12の周壁部に取付けた磁気センサ17eによってロータ17aの回転数を検知できるようになっている。   The water flow sensor 17 includes a rotor 17a that functions as an impeller. The rotor 17a is configured to rotate by the hot water when the hot water flows through the first outflow pipe portion 12. A shaft portion 17b projects from the rotor 17a on the upstream side and the downstream side, and is rotatably supported by an upstream side shaft support portion 17c and a downstream side shaft support portion 17d. The rotor 17a is configured as a permanent magnet as a whole, or a permanent magnet is attached to a part of the circumferential direction, and the rotational speed of the rotor 17a can be detected by a magnetic sensor 17e attached to the peripheral wall portion of the first outflow pipe portion 12. It has become.

この磁気センサ17eの検知信号は電子制御装置Cに送出され、所定の閾値を超える信号を検知したとき水流有りと検出し、所定の閾値以下の場合には水流無しと検出するように構成されている。なお、所定の閾値を超える場合は、磁気センサ17eの検知信号に基づいて電子制御装置Cが第一の流出管部12を流れる湯水の水量を算出するように構成してもよい。   The detection signal of the magnetic sensor 17e is sent to the electronic control unit C, and is configured to detect that there is a water flow when a signal exceeding a predetermined threshold is detected, and to detect that there is no water flow if the signal is below the predetermined threshold. Yes. In addition, when exceeding a predetermined threshold value, you may comprise so that the electronic controller C may calculate the amount of the hot water which flows through the 1st outflow pipe part 12 based on the detection signal of the magnetic sensor 17e.

さらに、電子制御装置Cは、給湯栓72が開かれることによって水流センサ17が水流有りを検知したときに開閉弁16を強制的に閉制御するように構成されている。このとき、浴槽に一定水量湯張りするための湯張り制御中など、風呂用給湯路6(第二給湯路)への定量給湯制御中であった場合には、当該制御を一旦中断して開閉弁16を閉制御する。その後、給湯栓72が閉じられて一般給湯路7への湯水の流出が停止したことを水流センサ17が検出すると、電子制御装置Cは開閉弁16を開いて上記の定量給湯制御を再開する。   Furthermore, the electronic control unit C is configured to forcibly close the on-off valve 16 when the water flow sensor 17 detects the presence of a water flow by opening the hot-water tap 72. At this time, if the hot water supply control for the hot water supply passage 6 (second hot water supply passage) is being performed, such as during hot water filling control for filling the bathtub with a constant amount of hot water, the control is temporarily interrupted and opened and closed. The valve 16 is closed. Thereafter, when the water flow sensor 17 detects that the hot-water tap 72 is closed and the outflow of hot water into the general hot water supply path 7 is stopped, the electronic control unit C opens the on-off valve 16 and resumes the above-mentioned quantitative hot water supply control.

上記水流抑制部18は、本実施例では第一の流出管部12内に取付けられる円筒状部材によって構成されている。該円筒状部材は第一の流出管部12の下流端開口から内部に挿入され、第一の流出管部12の上流端入水口の内径と略同径とされ、その上流側端部18aが徐々に縮径されて先細り状に形成されているとともに、該上流側端部が、第一の流出管部12の上流端入水口から流入管部11の径方向内方に向けて突出形成されている。より詳細には、流入管部11の内面は円周面であるため、該円周面に開口する第一の流出管部12の上流端入水口は、流入管部11の周方向における両端部が高い位置にあり、流入管部11の周方向における上流端入水口の中央部は上記両端部に比して低い位置にあるが、水流抑制部18の上流側端部は、少なくとも上記中央部において上流端入水口から突出していれば良く、上記両端部においては水流抑制部18が上流端入水口から突出していなくてもよい。   In the present embodiment, the water flow suppressing portion 18 is constituted by a cylindrical member attached in the first outflow pipe portion 12. The cylindrical member is inserted into the inside from the downstream end opening of the first outflow pipe portion 12 and has the same diameter as the inner diameter of the upstream end water inlet of the first outflow pipe portion 12, and the upstream end portion 18 a is The diameter is gradually reduced to be tapered, and the upstream end is projected from the upstream end water inlet of the first outflow pipe 12 toward the inside in the radial direction of the inflow pipe 11. ing. More specifically, since the inner surface of the inflow pipe portion 11 is a circumferential surface, the upstream end water inlets of the first outflow pipe portion 12 opened to the circumferential surface are both end portions in the circumferential direction of the inflow pipe portion 11. Is located at a higher position, and the central portion of the upstream end inlet in the circumferential direction of the inflow pipe portion 11 is located lower than the both end portions, but the upstream end portion of the water flow suppressing portion 18 is at least the central portion. In this case, the water flow suppressing portion 18 may not protrude from the upstream end inlet.

本実施形態に係る分岐管1によれば、供給される湯水の流量を調整する流量調整弁14、第二の流出管部13の流路を開閉する開閉弁16及び第一の流出管部12への湯水の流出の有無を検知する水流センサ17を一体に設けたので、給湯器ケーシング内の配管構成のコンパクト化と部品点数の削減とを図ることができ、更なる給湯器Bの小型化・薄型化と低コスト化とを図ることができる。   According to the branch pipe 1 according to the present embodiment, the flow rate adjustment valve 14 that adjusts the flow rate of the supplied hot water, the on-off valve 16 that opens and closes the flow path of the second outflow pipe section 13, and the first outflow pipe section 12. Since the water flow sensor 17 for detecting the presence or absence of outflow of hot water to the water is integrally provided, the piping configuration in the water heater casing can be made compact and the number of parts can be reduced, and the water heater B can be further downsized.・ Thinner and cost can be reduced.

また、水流センサ17を流量調整弁14に近接配置しているにもかかわらず、流入管部11から第二の流出管部13へ流通する湯水の水流の影響による水流センサ17の誤検知を、水流抑制部18によって抑制することができ、一般給湯路7への給湯がなされていないときの誤作動を防止して、本来の制御を効率よく行うことができる。   Moreover, although the water flow sensor 17 is disposed close to the flow rate adjustment valve 14, erroneous detection of the water flow sensor 17 due to the influence of the water flow of hot water flowing from the inflow pipe portion 11 to the second outflow pipe portion 13, It can be suppressed by the water flow suppression unit 18, and it is possible to prevent malfunction when hot water is not supplied to the general hot water supply path 7, and to perform original control efficiently.

特に、高水圧条件下では、弁体14a周囲の隙間は非常に狭いため、弁体14a以降の流速はかなり速くなることがあり、第一の流出管部12の上流端入水口を弁体14aに近接配置すると、弁体14a以降の速い水流が流入管部11の内周面近傍に沿う層流や乱流や渦流を生じさせ、この層流や乱流や渦流が第一の流出管部12の上流端入水口から流入して、第一の流出管部12内の水流センサ17を作動させるような水流を第一の流出管部12内に生じさせてしまうことが懸念されるが、本実施形態では、弁体14a以降の速い水流が上流端入水口から突出する水流抑制部18に直接衝当して流速が緩和され、これにより水流センサ17の誤作動を抑制することが可能になる。   In particular, under high water pressure conditions, the gap around the valve body 14a is very narrow, so the flow velocity after the valve body 14a may be considerably high, and the upstream end inlet of the first outflow pipe portion 12 is connected to the valve body 14a. When the valve body 14a is disposed close to the base, the rapid water flow after the valve body 14a generates a laminar flow, turbulent flow, or vortex along the inner peripheral surface of the inflow pipe portion 11. However, there is a concern that a water flow may be generated in the first outflow pipe portion 12 so as to actuate the water flow sensor 17 in the first outflow pipe portion 12. In the present embodiment, the fast water flow after the valve body 14a directly impinges on the water flow suppressing portion 18 protruding from the upstream end water inlet, and the flow velocity is relaxed, whereby the malfunction of the water flow sensor 17 can be suppressed. Become.

本発明は上記実施形態に限定されるものではなく、適宜設計変更できる。   The present invention is not limited to the above-described embodiment, and the design can be changed as appropriate.

例えば、図6に示す第2実施形態のように、水流抑制部18の上流側端部18aが流入管部11の径方向内方にむけて突出形成されておらず、水流抑制部18を構成する筒状部材が第一の流出管部12内に埋設されており、該筒状部材の上流側端部18aと第一の流出管部12の上流端入水口との間に窪み部20が形成されるように構成することもできる。かかる構成であっても、流入管部11から第二の流出管部13へ湯水が流出している場合に第一の流出管部12の上流端入水口近傍に生じる層流や乱流や渦流は窪み部20によってある程度緩和され、第一の流出管部12内に大きな渦流や乱流が生じることを抑制して、水流センサ17の誤作動を防止できる。   For example, as in the second embodiment shown in FIG. 6, the upstream end portion 18 a of the water flow suppressing portion 18 is not formed to protrude inward in the radial direction of the inflow pipe portion 11, and the water flow suppressing portion 18 is configured. A cylindrical member is embedded in the first outflow pipe portion 12, and a recess 20 is formed between the upstream end portion 18 a of the cylindrical member and the upstream end water inlet of the first outflow pipe portion 12. It can also be configured to be formed. Even in such a configuration, when hot water flows out from the inflow pipe portion 11 to the second outflow pipe portion 13, laminar flow, turbulent flow, and vortex flow generated in the vicinity of the upstream end inlet of the first outflow pipe portion 12. Can be relaxed to some extent by the depression 20, and the occurrence of large vortex or turbulence in the first outflow pipe 12 can be suppressed to prevent malfunction of the water flow sensor 17.

また、図7に示す第3実施形態のように、水流抑制部18を構成する筒状部材の上流側端部を先細り状に構成せず、直管状に構成することもできる。かかる構成によっても、弁体14a以降の速い水流が上流端入水口から突出する水流抑制部18に直接衝当して流速が緩和され、これにより水流センサ17の誤作動を抑制することが可能になる。   Moreover, like 3rd Embodiment shown in FIG. 7, the upstream edge part of the cylindrical member which comprises the water flow suppression part 18 is not comprised in a taper shape, but it can also comprise in a straight tube shape. Even with such a configuration, the fast water flow after the valve body 14a directly impinges on the water flow suppressing portion 18 protruding from the upstream end water inlet, and the flow velocity is reduced, thereby preventing the water flow sensor 17 from malfunctioning. Become.

また、図8に示す第4実施形態のように、水流抑制部18を第一の流出管部12の上流端入水口の内周面を上流側に向けて先細り状に構成することにより第一の流出管部12に一体に設けることもできる。かかる構成によっても、第一の流出管部12の上流端入水口の口径を絞ることにより流入管部11から第二の流出管部13へ流れる湯水が第一の流出管部12に流入し難くなり、これにより第一の流出管部12内に大きな渦流や乱流が生じることを抑制して、水流センサ17の誤作動を防止できる。   Further, as in the fourth embodiment shown in FIG. 8, the water flow suppressing portion 18 is configured by tapering the inner peripheral surface of the upstream end water inlet of the first outflow pipe portion 12 toward the upstream side. It can also be provided integrally with the outflow pipe portion 12. Even with such a configuration, hot water flowing from the inflow pipe portion 11 to the second outflow pipe portion 13 is less likely to flow into the first outflow pipe portion 12 by narrowing the diameter of the upstream end water inlet of the first outflow pipe portion 12. Thus, it is possible to suppress the occurrence of a large vortex or turbulent flow in the first outflow pipe portion 12, and to prevent malfunction of the water flow sensor 17.

また、図9に示す第5実施形態のように、水流抑制部18は、第一の流出管部12の上流端入水口からその径方向内方に突出する突出部によって構成されていてもよく、該突出部は入水口の周方向全長にわたって形成されていてもよく、周方向一部のみに形成されていてもよい。   Moreover, the water flow suppression part 18 may be comprised by the protrusion part which protrudes in the radial direction inward from the upstream end water inlet of the 1st outflow pipe part 12, like 5th Embodiment shown in FIG. The protruding portion may be formed over the entire length in the circumferential direction of the water inlet, or may be formed only in a part in the circumferential direction.

また、上記実施形態では、風呂用給湯路6と一般給湯路7に給湯分岐させる例を示したが、例えば、貯湯タンクへの給湯路と一般給湯路とに分岐させる分岐管として本発明を実施してもよく、その他適宜の給湯目的に本発明を適用することが可能である。また、上記実施形態では、風呂注湯機能付き給湯器の例を示したが、これに代えて風呂追焚き機能付き給湯器に適用することもできる。この場合、風呂用給湯路6は追焚き配管に接続される。   Moreover, although the example which branches the hot water supply to the hot water supply path 6 for baths and the general hot water supply path 7 was shown in the said embodiment, for example, this invention is implemented as a branch pipe branched to the hot water supply path to a hot water storage tank, and a general hot water supply path. Alternatively, the present invention can be applied to other appropriate hot water supply purposes. Moreover, in the said embodiment, although the example of the water heater with a bath pouring function was shown, it can replace with this and can also apply to a water heater with a bath reheating function. In this case, the hot water supply path 6 for a bath is connected to a reheating pipe.

B 給湯器
C 電子制御装置
1 分岐管
2 入水路
3 熱交換器
4 燃焼バーナ
5 出湯路
6 第二給湯路
7 第一給湯路
8 バイパス路
81 バイパス流量調整弁
11 流入管部
12 第一の流出管部
13 第二の流出管部
14 流量調整弁
16 開閉弁
17 水流センサ
18 水流抑制部
B Water heater C Electronic control device 1 Branch pipe 2 Inlet path 3 Heat exchanger 4 Combustion burner 5 Outlet path 6 Second hot water path 7 First hot water path 8 Bypass path 81 Bypass flow control valve 11 Inflow pipe section 12 First outflow Pipe part 13 Second outflow pipe part 14 Flow rate adjusting valve 16 On-off valve 17 Water flow sensor 18 Water flow suppression part

Claims (6)

湯水が流入する流入管部と、該流入管部に流入した湯水を二方向へ流出させる第一及び第二の流出管部とを備え、第一の流出管部内に、第一の流出管部からの湯水の流出の有無を検知するための水流センサが配設されているとともに、第一の流出管部からの湯水の流出が無く且つ第二の流出管部から湯水が流出するときに前記水流センサを作動させる水流が第一の流出管部内に発生することを抑制する水流抑制部が前記水流センサの上流側に設けられており、前記水流抑制部は筒状であるとともにその上流側端部が先細り状に形成されていることを特徴とする水流センサ付き分岐管。 An inflow pipe section into which hot water flows and a first and second outflow pipe section for flowing out the hot water flowing into the inflow pipe section in two directions, and the first outflow pipe section in the first outflow pipe section A water flow sensor is provided for detecting the presence or absence of hot water outflow from the first outflow pipe portion, and there is no outflow of hot water from the first outflow pipe portion and the hot water flows out from the second outflow pipe portion. A water flow suppression unit that suppresses the generation of a water flow that operates the water flow sensor in the first outflow pipe portion is provided on the upstream side of the water flow sensor, and the water flow suppression unit is cylindrical and has an upstream end. A branch pipe with a water flow sensor, characterized in that the portion is formed in a tapered shape . 請求項1に記載の水流センサ付き分岐管において、第一の流出管部は流入管部に対して軸方向に交差するように接続されており、前記水流抑制部が、第一の流出管部の上流端入水口から流入管部の径方向内方に向けて突出形成されていることを特徴とする水流センサ付き分岐管。   2. The branch pipe with a water flow sensor according to claim 1, wherein the first outflow pipe portion is connected to the inflow pipe portion so as to intersect the axial direction, and the water flow suppression portion is the first outflow pipe portion. A branch pipe with a water flow sensor, wherein the branch pipe is formed so as to protrude inward in the radial direction of the inflow pipe portion from the upstream end water inlet. 請求項1又は2に記載の水流センサ付き分岐管において、前記水流センサは、永久磁石付きロータの回転数を磁気センサで検知する水量センサであり、該水量センサの検知信号が所定の閾値を超える場合に水流有りとして検出作動するよう構成されていることを特徴とする水流センサ付き分岐管。 The branch pipe with a water flow sensor according to claim 1 or 2, wherein the water flow sensor is a water amount sensor that detects a rotation number of a rotor with a permanent magnet by a magnetic sensor, and a detection signal of the water amount sensor exceeds a predetermined threshold value. A branch pipe with a water flow sensor, which is configured to detect and detect that there is a water flow. 請求項1,2又は3に記載の水流センサ付き分岐管において、前記流入管部内には流入管部に流入する湯水の流量を調整する流量調整弁が配設されていることを特徴とする水流センサ付き分岐管。   The branch pipe with a water flow sensor according to claim 1, 2, or 3, wherein a flow rate adjusting valve for adjusting a flow rate of hot water flowing into the inflow pipe portion is disposed in the inflow pipe portion. Branch pipe with sensor. 請求項1〜4のいずれか1項に記載の水流センサ付き分岐管において、前記第二の流出管部の開閉を行う開閉弁が第二の流出管部に設けられていることを特徴とする水流センサ付き分岐管。   The branch pipe with a water flow sensor according to any one of claims 1 to 4, wherein an opening / closing valve for opening and closing the second outflow pipe section is provided in the second outflow pipe section. Branch pipe with water flow sensor. 燃焼バーナと、燃焼バーナの燃焼作動により生じる燃焼ガスを受けて加熱される管路を備えた熱交換器と、この熱交換器の管路に入水させる入水路と、この入水路からの入水が上記熱交換器で熱交換加熱された後に出湯される出湯路と、上記熱交換器をバイパスするように上記入水路から分岐されて上記出湯路に合流するバイパス路と、電子制御装置とを備える給湯器において、
前記バイパス路の合流部よりも下流側で前記出湯路に請求項5に記載の水流センサ付き分岐管の流入管部が接続され、該分岐管の第一の流出管部に第一の給湯路が接続され、分岐管の第二の流出管部に第二の給湯路が接続され、前記水流センサと前記開閉弁とが前記電子制御装置に接続され、前記電子制御装置は、水流センサが水流有りを検知したときに前記開閉弁を閉制御するように構成されていることを特徴とする給湯器。
A heat exchanger having a combustion burner, a pipe that is heated by receiving combustion gas generated by the combustion operation of the combustion burner, a water inlet that enters the pipe of the heat exchanger, and water that enters from the water inlet A hot water outlet that is discharged after heat exchange heating in the heat exchanger, a bypass that branches off from the water inlet so as to bypass the heat exchanger and merges with the hot water outlet, and an electronic control unit are provided. In the water heater,
The inflow pipe part of the branch pipe with a water flow sensor according to claim 5 is connected to the hot water supply path downstream from the junction part of the bypass path, and the first hot water supply path is connected to the first outflow pipe part of the branch pipe. Is connected, a second hot water supply passage is connected to the second outflow pipe portion of the branch pipe, the water flow sensor and the on-off valve are connected to the electronic control device, and the electronic control device has a water flow sensor A water heater configured to close the on-off valve when the presence is detected.
JP2011183206A 2011-08-25 2011-08-25 Branch pipe with water flow sensor and water heater using the same Active JP5804259B2 (en)

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JPH0632961U (en) * 1992-10-01 1994-04-28 株式会社ハーマン Water heater
JP2001311550A (en) * 2000-04-28 2001-11-09 Harman Co Ltd Bath hot water supplying device
JP2004036960A (en) * 2002-07-02 2004-02-05 Noritz Corp Supply control method for fluid supply device, and fluid supply device
JP4765412B2 (en) * 2005-05-31 2011-09-07 株式会社ノーリツ Piping structure and filter with drainage promoting function
JP3800428B1 (en) * 2005-08-24 2006-07-26 東フロコーポレーション株式会社 Collective piping unit with built-in flow sensor
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