JP6769786B2 - Connection joint and hot water storage type water heater - Google Patents

Connection joint and hot water storage type water heater Download PDF

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JP6769786B2
JP6769786B2 JP2016174031A JP2016174031A JP6769786B2 JP 6769786 B2 JP6769786 B2 JP 6769786B2 JP 2016174031 A JP2016174031 A JP 2016174031A JP 2016174031 A JP2016174031 A JP 2016174031A JP 6769786 B2 JP6769786 B2 JP 6769786B2
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hot water
tank
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water
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JP2018040525A (en
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憲利 太田
憲利 太田
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Lixil Corp
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本発明は、接続継手及びこの接続継手を備える貯湯式温水器に関する。 The present invention relates to a connecting joint and a hot water storage type water heater including the connecting joint.

従来、加熱手段を備えるタンク内において、供給された水を加熱して貯湯し、貯えられた湯を供給して蛇口から出湯させる密閉型給湯器が知られている(例えば、特許文献1)。このような密閉型給湯器では、貯湯タンク内で湯水を沸かす際に、水中の空気が一部気化して貯湯タンク上部に気泡が発生する。そこで、給湯時に吐水中に気泡が混入することによる吐水の乱れを防ぐために、エアを自動的に開放するエア抜き管が設けられている。 Conventionally, there is known a closed type water heater that heats and stores the supplied water in a tank provided with a heating means, supplies the stored hot water, and discharges the hot water from a faucet (for example, Patent Document 1). In such a closed type water heater, when boiling water in the hot water storage tank, a part of the air in the water is vaporized and bubbles are generated in the upper part of the hot water storage tank. Therefore, an air bleeding pipe that automatically releases air is provided in order to prevent disturbance of the water discharge due to air bubbles mixed in the water discharge during hot water supply.

従来の密閉型給湯器では、給湯管とエア抜き管とを共用し、湯水を沸かしている間に定期的にエア抜き弁を解放することで湯の使用前に溜まったエアを事前排出する方法がある。この他、貯湯タンク上部に出湯口とエア抜き口とを設け、貯湯タンク上部にたまったエアをエア抜き口に誘導して排出する方法がある。 In the conventional closed water heater, the hot water supply pipe and the air bleeding pipe are shared, and the air bleeding valve is periodically opened while boiling the hot water to discharge the accumulated air before using the hot water. There is. In addition, there is a method in which a hot water outlet and an air vent are provided in the upper part of the hot water storage tank, and the air accumulated in the upper part of the hot water storage tank is guided to the air vent and discharged.

特許第4688054号公報Japanese Patent No. 4688504

給湯管とエア抜き管とを共用して貯湯タンク内に溜まったエアを定期的に事前排出する方法では、エア排出後に貯湯タンク内に新たに溜まったエアは次回排出のタイミングまでエア抜きされない。そのため、エア抜きと湯の使用タイミング次第では、給湯管からの供給される湯にエアが混入することを防止し難く、給湯時に吐水が乱れることが懸念される。 In the method of periodically pre-discharging the air accumulated in the hot water storage tank by sharing the hot water supply pipe and the air bleeding pipe, the air newly accumulated in the hot water storage tank after the air is discharged is not evacuated until the next discharge timing. Therefore, depending on the timing of air bleeding and hot water use, it is difficult to prevent air from being mixed in the hot water supplied from the hot water supply pipe, and there is a concern that water discharge may be disturbed during hot water supply.

特許文献1の密閉型給湯器では、給湯管とは別途エア抜き口が設けられているので、上述のような吐水の乱れを防ぐことができるが、出湯口及びエア抜き口にそれぞれ接続フランジ及び接続継手を設ける必要があり、部品コストが増大する点で課題となっていた。 In the closed type water heater of Patent Document 1, since an air vent is provided separately from the hot water supply pipe, it is possible to prevent the above-mentioned disturbance of water discharge, but the connection flange and the air vent are connected to the hot water outlet and the air vent, respectively. It is necessary to provide a connection joint, which has been a problem in that the cost of parts increases.

上記事情を踏まえ、本発明は、部品点数を抑えて、吐出される湯にエアが混入することを防止でき、かつ、給湯器の小型化が可能な接続継手及び貯湯式温水器を提供することを目的とする。 Based on the above circumstances, the present invention provides a connecting joint and a hot water storage type water heater that can reduce the number of parts, prevent air from being mixed into the discharged hot water, and can reduce the size of the water heater. With the goal.

本発明に係る接続継手は、タンクに取り付けられる接続継手であって、貯湯されているタンク内の湯が通流する出湯路と、前記タンク内で発生するエアを脱気するためのエア抜き路と、を備え、前記エア抜き路は、前記タンク内への給水を行いつつ前記タンク内の湯を排出して前記タンク内の湯水を入れ替える際に、前記タンク内の湯を排出するための管路を兼ねることを特徴とする。 The connection joint according to the present invention is a connection joint attached to a tank, and is a hot water outlet through which hot water in the stored tank flows and an air bleeding path for degassing the air generated in the tank. The air bleeding path is a pipe for discharging hot water in the tank while supplying water to the tank, and when replacing the hot water in the tank, the hot water in the tank is discharged. characterized Rukoto serves the road.

この発明によれば、一部品からなる接続継手に出湯路とエア抜き路とを備えるので、タンクの上部に一つの接続継手を設けることにより、出湯とエア抜きとを独立して行うことができる。このため、接続継手の部品点数を抑えることができ、軽量化及び部品コストを削減可能な接続継手を提供できる。 According to the present invention, since the connecting joint composed of one component is provided with a hot water outlet and an air bleeding passage, the hot water discharge and the air bleeding can be performed independently by providing one connecting joint on the upper part of the tank. .. Therefore, the number of parts of the connection joint can be suppressed, and a connection joint capable of reducing the weight and the cost of the parts can be provided.

本発明に係る接続継手は、前記タンクに前記接続継手が取り付けられた状態において前記出湯路の前記タンク側の開口が前記エア抜き路の前記タンク側の開口よりも下方に位置するように、前記タンク側における前記出湯路の開口と前記エア抜き路の開口とが離間して形成されていてもよい。 The connection joint according to the present invention is described so that the opening on the tank side of the hot water passage is located below the opening on the tank side of the air vent passage in a state where the connection joint is attached to the tank. The opening of the hot water passage and the opening of the air bleeding passage on the tank side may be formed so as to be separated from each other.

この発明によれば、出湯路の開口がエア抜き路の開口よりも低い位置で採湯可能となる。したがって、エア抜き路からはタンクの上部に溜まるエアを効率良く排出でき、かつ出湯路にエアが混入することを抑えることができる。また、タンクの開口が一つであっても、吐水とエアを確実に分離できる。 According to the present invention, hot water can be collected at a position where the opening of the hot water passage is lower than the opening of the air vent passage. Therefore, the air accumulated in the upper part of the tank can be efficiently discharged from the air bleeding path, and the air can be suppressed from being mixed in the hot water outlet. Further, even if the tank has only one opening, water discharge and air can be reliably separated.

本発明に係る接続継手は、前記タンクに前記接続継手が取り付けられた状態において、前記出湯路の下流側の開口と、前記エア抜き路の下流側の開口とが同じ高さで異なる方向に向かって開口していてもよい。 In the connection joint according to the present invention, when the connection joint is attached to the tank, the opening on the downstream side of the hot water passage and the opening on the downstream side of the air bleeding passage are directed at the same height and in different directions. It may be open.

この発明によれば、2つの通路が形成された接続継手のタンクへの挿入方向の寸法を小型化できる。 According to the present invention, it is possible to reduce the size of the connection joint in which the two passages are formed in the insertion direction into the tank.

本発明に係る接続継手において、前記エア抜き路の通路径は前記出湯路の通路径よりも小さくてもよい。 In the connecting joint according to the present invention, the passage diameter of the air vent passage may be smaller than the passage diameter of the hot water outlet.

この発明によれば、エア抜き路の通路径を小さくすることで、エアの排出時の流速を上げて短時間で効率的にエアを外部に排出できる。また、接続継手における出湯路の通路径を大きく確保できるため、配管の圧力損失を低減し、出湯時の湯の勢いを確保することができる。 According to the present invention, by reducing the passage diameter of the air vent path, the flow velocity at the time of discharging the air can be increased and the air can be efficiently discharged to the outside in a short time. Further, since the passage diameter of the hot water passage in the connecting joint can be secured to be large, the pressure loss of the pipe can be reduced and the momentum of the hot water at the time of hot water can be secured.

本発明に係る貯湯式温水器は、給水管から供給された水を加熱して貯湯するタンクと、前記タンクの上部に取り付けられる上記のいずれかに記載の接続継手と、前記接続継手の前記出湯路に接続される出湯管と、前記接続継手のエア抜き路に接続され、湯入替管を兼ねるエア抜き管と、を備えることを特徴とする。 The hot water storage type water heater according to the present invention has a tank that heats and stores water supplied from a water supply pipe, a connecting joint according to any one of the above attached to the upper part of the tank, and the hot water discharge of the connecting joint. a hot water pipe connected to the road, which is connected to the air vent passage of the connection joint, characterized in that it comprises an air vent tube Ru also serves as a water replacement pipe, the.

この発明によれば、一つの接続継手をタンクに取り付けることにより出湯路とエア抜き路とを確保できる。したがって、部品コストを抑えることができるとともに、従来、出湯用とエア抜き用と二箇所の開口が形成されていた高温沸き上げ機種専用のタンクを用いる必要がなく、部品の汎用性を高めることができる。 According to the present invention, a hot water outlet and an air bleeding path can be secured by attaching one connecting joint to the tank. Therefore, it is possible to reduce the cost of parts, and it is not necessary to use a tank dedicated to high-temperature boiling models, which has conventionally formed two openings, one for hot water and one for air bleeding, and the versatility of parts can be improved. it can.

本発明の接続継手及び貯湯式温水器によれば、部品点数を抑えて、吐水される湯にエアが混入することを防止でき、かつ、給湯器の小型化が可能な接続継手及び貯湯式温水器を提供できる。 According to the connection joint and the hot water storage type water heater of the present invention, the number of parts can be reduced, air can be prevented from being mixed in the hot water discharged, and the water heater can be miniaturized. Can provide a vessel.

本発明の第一実施形態に係る貯湯式温水器の斜視図である。It is a perspective view of the hot water storage type water heater which concerns on 1st Embodiment of this invention. 本発明の第一実施形態に係る貯湯式温水器の内部の正面図である。It is a front view of the inside of the hot water storage type water heater which concerns on 1st Embodiment of this invention. 本発明の第一実施形態に係る貯湯式温水器の内部構成を示す図である。It is a figure which shows the internal structure of the hot water storage type water heater which concerns on 1st Embodiment of this invention. 本発明の第一実施形態の接続継手の斜視図である。It is a perspective view of the connection joint of the 1st Embodiment of this invention. 本発明の第一実施形態におけるタンクと接続継手との接続構造を示す断面図である。It is sectional drawing which shows the connection structure of the tank and the connection joint in 1st Embodiment of this invention. 本発明の第一実施形態における貯湯式温水器の内部の上面図である。It is a top view of the inside of the hot water storage type water heater in the 1st Embodiment of this invention. 本発明の第一実施形態におけるタンク上部の側面図である。It is a side view of the upper part of the tank in 1st Embodiment of this invention. 本発明の第一実施形態の接続継手の変形例を示す断面図である。It is sectional drawing which shows the modification of the connection joint of the 1st Embodiment of this invention. 本発明の第一実施形態の接続継手の変形例を示す斜視図である。It is a perspective view which shows the modification of the connection joint of the 1st Embodiment of this invention.

本発明の一実施形態に係る貯湯式温水器について説明する。図1は、本実施形態に係る貯湯式温水器1の斜視図である。本実施形態に係る貯湯式温水器1は、シンク100の上方の壁面に固定して使用される。貯湯式温水器1は、シンク100上に設けられた混合水栓5及び排水口9に壁内の配管を介して接続されている。 A hot water storage type water heater according to an embodiment of the present invention will be described. FIG. 1 is a perspective view of a hot water storage type water heater 1 according to the present embodiment. The hot water storage type water heater 1 according to the present embodiment is used by being fixed to the wall surface above the sink 100. The hot water storage type water heater 1 is connected to the mixing faucet 5 and the drain port 9 provided on the sink 100 via a pipe in the wall.

図2は、貯湯式温水器1の内部の正面図である。図3は、貯湯式温水器1の内部構成を示す図である。図2及び図3に示すように、本実施形態に係る貯湯式温水器1は、給水管2と、タンク3と、給湯管4と、湯入替管・エア抜き管6と、膨張水排水管・水抜管8と、電源コード10とを備え、これらが基台11に固定されている。 FIG. 2 is a front view of the inside of the hot water storage type water heater 1. FIG. 3 is a diagram showing an internal configuration of the hot water storage type water heater 1. As shown in FIGS. 2 and 3, the hot water storage type water heater 1 according to the present embodiment includes a water supply pipe 2, a tank 3, a hot water supply pipe 4, a hot water replacement pipe / air bleeding pipe 6, and an expanded water drain pipe. A drainage pipe 8 and a power cord 10 are provided, and these are fixed to the base 11.

給水管2は上流端が給水栓20と接続され、下流端がタンク3と接続されている。給水管2には、上流から下流に向かって順に、フィルタ21、逆止弁22、減圧弁23、サーミスタ24、及びフローセンサ25が設けられている。 The upstream end of the water supply pipe 2 is connected to the water faucet 20, and the downstream end is connected to the tank 3. The water supply pipe 2 is provided with a filter 21, a check valve 22, a pressure reducing valve 23, a thermistor 24, and a flow sensor 25 in this order from upstream to downstream.

フィルタ21、逆止弁22、減圧弁23、サーミスタ24、及びフローセンサ25は公知の部材である。フィルタ21を通過した水が逆止弁22を通過し、減圧弁23により減圧されてタンク3に流入する。このとき、サーミスタ24で給水管2の温度が検知され、給水管2の流水量がフローセンサ25で検知される。 The filter 21, the check valve 22, the pressure reducing valve 23, the thermistor 24, and the flow sensor 25 are known members. The water that has passed through the filter 21 passes through the check valve 22, is depressurized by the pressure reducing valve 23, and flows into the tank 3. At this time, the temperature of the water supply pipe 2 is detected by the thermistor 24, and the flow rate of the water supply pipe 2 is detected by the flow sensor 25.

タンク3は、下端部に給水口が形成されており、給水口に給水管2の下流端が連結されている。タンク3の内部には、加熱部31と、2つのサーミスタ32,33とを備える。加熱部31は電熱線でありタンク3内の水を加熱する。タンク3内は満水状態に保持された密閉タンクである。タンク3内では下部の水温が低く、加熱部31近傍から上部までは水温が高い。タンク3内の上下に設けられた2つのサーミスタ32,33によりタンク3内の上部及び下部の水温を検知し、不図示の制御部により加熱部の通電量が制御される。 A water supply port is formed at the lower end of the tank 3, and the downstream end of the water supply pipe 2 is connected to the water supply port. Inside the tank 3, a heating unit 31 and two thermistors 32 and 33 are provided. The heating unit 31 is a heating wire and heats the water in the tank 3. The inside of the tank 3 is a closed tank kept in a full state. In the tank 3, the water temperature at the lower part is low, and the water temperature is high from the vicinity of the heating portion 31 to the upper part. Two thermistors 32 and 33 provided above and below the tank 3 detect the water temperature of the upper part and the lower part in the tank 3, and a control unit (not shown) controls the energization amount of the heating unit.

図4は、接続継手34の斜視図である。図5は、タンク3上部の部分断面図である。タンク3の上端中央部に一つの給湯開口部35が形成されている。給湯管4は、給湯開口部35に挿入された接続継手34を介して給湯開口部35に接続されている。図4及び図5に示すように、接続継手34は、内部に出湯路342とエア抜き路340とを備え、一体に形成された一部品である。出湯路342とエア抜き路340とは、タンク3内に配設される上流側では平行に並んで延びている。エア抜き路340の上流側の開口が出湯路342の上流側の開口よりも上方に配置されるように、接続継手34の上流側には段差が設けられており、エア抜き路340の開口と出湯路342の開口とは上下方向に離間して形成されている。この段差は、湯と空気を分離できるだけの距離があるのが好ましい。しかし、出湯路342の上流側の開口の位置を下げ過ぎるとそれより上の湯を給湯管4に導きにくくなるため、10〜20mm程度の適度な距離が望ましい。タンク3の上部に突出する下流側では、出湯路342とエア抜き路340とは、同じ高さで逆方向に延びるように通路が曲折している。ここでいう同じ高さとは、図5に示すように、出湯路342の下流側開口343とエア抜き路340の下流側開口341との高さが一部で重なっていればよい。エア抜き路340の通路径は出湯路342の通路径よりも小さい。 FIG. 4 is a perspective view of the connecting joint 34. FIG. 5 is a partial cross-sectional view of the upper part of the tank 3. One hot water supply opening 35 is formed at the center of the upper end of the tank 3. The hot water supply pipe 4 is connected to the hot water supply opening 35 via a connection joint 34 inserted into the hot water supply opening 35. As shown in FIGS. 4 and 5, the connection joint 34 is an integrally formed component having a hot water outlet 342 and an air bleeding passage 340 inside. The hot water passage 342 and the air bleeding passage 340 extend in parallel on the upstream side arranged in the tank 3. A step is provided on the upstream side of the connecting joint 34 so that the opening on the upstream side of the air bleeding path 340 is arranged above the opening on the upstream side of the hot water supply path 342, and the opening on the upstream side of the air bleeding path 340 It is formed so as to be separated from the opening of the hot water passage 342 in the vertical direction. It is preferable that this step has a distance enough to separate hot water and air. However, if the position of the opening on the upstream side of the hot water passage 342 is lowered too much, it becomes difficult to guide the hot water above it to the hot water supply pipe 4, so an appropriate distance of about 10 to 20 mm is desirable. On the downstream side protruding to the upper part of the tank 3, the passage is bent so that the hot water passage 342 and the air bleeding passage 340 extend in opposite directions at the same height. As shown in FIG. 5, the same height here may mean that the heights of the downstream opening 343 of the hot water passage 342 and the downstream opening 341 of the air bleeding passage 340 partially overlap. The passage diameter of the air bleeding path 340 is smaller than the passage diameter of the hot water outlet 342.

図6は貯湯式温水器1の内部の上面図である。図7は、タンク3の上部の側面図である。図5及び図6に示すように、出湯路342の下流端には給湯管4が接続されている。図6及び図7に示すように、給湯管4は、タンク3の上面からわずかに離間した位置でタンク3の径方向に延びた後、下方に曲折し、タンク3の外周面に沿って下方に延びて形成されている。給湯管4の下流端は、シンク100の上方に設けられた混合水栓5と接続されている。混合水栓5には、給水管2も接続されている。 FIG. 6 is a top view of the inside of the hot water storage type water heater 1. FIG. 7 is a side view of the upper part of the tank 3. As shown in FIGS. 5 and 6, a hot water supply pipe 4 is connected to the downstream end of the hot water outlet 342. As shown in FIGS. 6 and 7, the hot water supply pipe 4 extends in the radial direction of the tank 3 at a position slightly separated from the upper surface of the tank 3, then bends downward and downwards along the outer peripheral surface of the tank 3. It is formed by extending to. The downstream end of the hot water supply pipe 4 is connected to a mixing faucet 5 provided above the sink 100. A water supply pipe 2 is also connected to the mixing faucet 5.

エア抜き路340の下流端には、エア抜き管6が接続されている。図6に示すように、エア抜き管6は、エア抜き路340の下流側の開口と接続されて給湯管4と反対側に延びた後、湾曲して給湯管4と略平行に延び、タンク3の上面からわずかに離間した位置でタンク3の径方向に延びた後、下方に曲折し、タンク3の外周面に沿って下方に延びて形成されている。エア抜き管6は、給湯時の気泡混入による吐水の乱れを防ぐために、タンク3内の加熱により生じたエアを脱気する管路であり、湯入替管6と同じ管で構成されている。 An air bleeding pipe 6 is connected to the downstream end of the air bleeding path 340. As shown in FIG. 6, the air bleeding pipe 6 is connected to the opening on the downstream side of the air bleeding path 340 and extends to the opposite side to the hot water supply pipe 4, and then curves and extends substantially parallel to the hot water supply pipe 4 to form a tank. It is formed so as to extend in the radial direction of the tank 3 at a position slightly separated from the upper surface of the tank 3, then bend downward, and extend downward along the outer peripheral surface of the tank 3. The air bleeding pipe 6 is a pipe that degass the air generated by heating in the tank 3 in order to prevent the water discharge from being disturbed due to the mixing of air bubbles during hot water supply, and is composed of the same pipe as the hot water replacement pipe 6.

湯入替管6は、タンク3内への給水を行いつつタンク3内の湯を排出してタンク3内の湯水を入れ替える際に、タンク3内の湯を排出するための管路である。湯入替管6は、エア抜き管6と同じ管で構成されている。 The hot water replacement pipe 6 is a pipe for discharging the hot water in the tank 3 when the hot water in the tank 3 is discharged and the hot water in the tank 3 is replaced while supplying water to the tank 3. The hot water replacement pipe 6 is composed of the same pipe as the air bleeding pipe 6.

図3に示すように、エア抜き管・湯入替管6の上流端は接続継手のエア抜き路340を介してタンク3の上部と接続され、下流端は排水口9と接続されている。エア抜き管・湯入替管6の上流端から下流端までの間には、公知の逆止弁61と、電磁弁70と、サーミスタ71とを備える。給水管2のサーミスタ24とフローセンサ25との間の位置に給水管2の分岐部が設けられ、分岐された給水管2は、エア抜き管・湯入替管6の逆止弁61と電磁弁70との間に接続されている。 As shown in FIG. 3, the upstream end of the air bleeding pipe / hot water replacement pipe 6 is connected to the upper part of the tank 3 via the air bleeding path 340 of the connecting joint, and the downstream end is connected to the drain port 9. A known check valve 61, a solenoid valve 70, and a thermistor 71 are provided between the upstream end and the downstream end of the air bleeding pipe / hot water replacement pipe 6. A branch portion of the water supply pipe 2 is provided at a position between the thermista 24 of the water supply pipe 2 and the flow sensor 25, and the branched water supply pipe 2 is a check valve 61 and a solenoid valve of the air bleeding pipe / hot water replacement pipe 6. It is connected to 70.

膨張水排水管8は、密閉されたタンク3内が所定温度よりも高温になった時にタンク3内で生じた膨張水を外部に排出する管路である。膨張水排水管8は、タンク3の下方において給水管2から分岐し、排水口9まで延設されている。膨張水排水管8は、給水管2からの分岐部と排水口9との間に逃し弁80を備える。逃し弁80は、タンク3内で生じた膨張水によりタンク側の内圧が高くなると開弁し、膨張水を排水口9に排出する弁である。膨張水排水管8は湯入替管6のサーミスタ71よりも下流側においてエア抜き管・湯入替管6と接続され、エア抜き管・湯入替管6の排水口9を共用している。膨張水排水管8は水抜管8と同じ管で構成されている。水抜管8はタンク3の下方に設けられ、タンク3への給水が行われない状態でタンク3内の湯水を排出する管である。逃し弁80を含め、水抜管8は、タンク3の下方に配設されているので、逃し弁80が開弁されると、タンク3内に貯められた水が流出して排水口9から排水されるように構成されている。したがって、給水栓20を閉じた状態で逃し弁80を強制的に開弁させれば、タンク3内の水を全て抜くことができる。なお、タンク3の下方とは、タンク3の底面よりも低い位置を指し、タンク3の直下の領域の他、図2に示すように、貯湯式温水器のケーシング12,13内におけるタンク3よりも低い位置も含む。 The expanded water drainage pipe 8 is a pipe that discharges the expanded water generated in the tank 3 to the outside when the temperature inside the closed tank 3 becomes higher than a predetermined temperature. The expanded water drainage pipe 8 branches from the water supply pipe 2 below the tank 3 and extends to the drainage port 9. The expanded water drainage pipe 8 includes a relief valve 80 between the branch portion from the water supply pipe 2 and the drainage port 9. The relief valve 80 is a valve that opens when the internal pressure on the tank side becomes high due to the expanded water generated in the tank 3 and discharges the expanded water to the drain port 9. The expanded water drainage pipe 8 is connected to the air bleeding pipe / hot water replacement pipe 6 on the downstream side of the thermista 71 of the hot water replacement pipe 6, and shares the drainage port 9 of the air bleeding pipe / hot water replacement pipe 6. The expanded water drainage pipe 8 is composed of the same pipe as the drainage pipe 8. The drainage pipe 8 is provided below the tank 3 and is a pipe for discharging hot water in the tank 3 in a state where water is not supplied to the tank 3. Since the drain pipe 8 including the relief valve 80 is arranged below the tank 3, when the relief valve 80 is opened, the water stored in the tank 3 flows out and drains from the drain port 9. It is configured to be. Therefore, if the relief valve 80 is forcibly opened with the water tap 20 closed, all the water in the tank 3 can be drained. The lower part of the tank 3 refers to a position lower than the bottom surface of the tank 3, and in addition to the area directly under the tank 3, as shown in FIG. 2, from the tank 3 in the casings 12 and 13 of the hot water storage type water heater. Including low position.

本実施形態では、水抜管8がエア抜き管・湯入替管6と接続されて、一つの排水口9を共用している。したがって、貯湯式温水器1の基台11の底面には、エア抜き管6と湯入替管6と水抜管8とを兼ねる管、給水管2、及び給湯管4の3つの管のみが設けられている。 In the present embodiment, the drain pipe 8 is connected to the air drain pipe / hot water replacement pipe 6 and shares one drain port 9. Therefore, on the bottom surface of the base 11 of the hot water storage type water heater 1, only three pipes, an air vent pipe 6, a hot water replacement pipe 6, a pipe that also serves as a water drain pipe 8, a water supply pipe 2, and a hot water supply pipe 4, are provided. ing.

貯湯式温水器1は、さらに、不図示の制御部及び制御部と接続された操作パネル16を備える。操作パネル16には表示部17と複数の操作ボタン18とを備える。表示部17は、貯湯式温水器1の運転状況や水温等の他、操作情報が表示可能に構成されている。操作ボタン18は、貯湯式温水器1の電源を入れる操作や給湯の設定等各種の入力操作を行う際に使用される。 The hot water storage type water heater 1 further includes a control unit (not shown) and an operation panel 16 connected to the control unit. The operation panel 16 includes a display unit 17 and a plurality of operation buttons 18. The display unit 17 is configured to be able to display operation information as well as the operating status and water temperature of the hot water storage type water heater 1. The operation button 18 is used when performing various input operations such as turning on the power of the hot water storage type water heater 1 and setting hot water supply.

貯湯式温水器1は、基台11の背面側が壁面に取り付けられて固定される。基台11の上部が上カバー12で覆われ、底面よりも下側は下カバー13で覆われる。上カバー12及び下カバー13は前面と両側面を構成する三面からなる断面U字形状の部材である。 In the hot water storage type water heater 1, the back side of the base 11 is attached to the wall surface and fixed. The upper part of the base 11 is covered with the upper cover 12, and the lower side of the base 11 is covered with the lower cover 13. The upper cover 12 and the lower cover 13 are members having a U-shaped cross section and are composed of three surfaces forming a front surface and both side surfaces.

次に、貯湯式温水器1の動作について説明する。タンク3内には給水管2からフィルタ21を透過してゴミが除去された水で満たされている。タンク3内の水は加熱部31が通電されることにより加熱され、タンク3内の上部の水が相対的に高温となる。タンク3の上部及び下部に設けられたサーミスタ32,33でタンク3内の水温を検知し、給湯が可能な状態が保たれるように制御部により加熱部31の通電状態を制御する。 Next, the operation of the hot water storage type water heater 1 will be described. The tank 3 is filled with water from which dust has been removed by passing through the filter 21 from the water supply pipe 2. The water in the tank 3 is heated by energizing the heating unit 31, and the water in the upper part of the tank 3 becomes relatively hot. Thermistors 32 and 33 provided at the upper and lower parts of the tank 3 detect the water temperature in the tank 3, and the control unit controls the energized state of the heating unit 31 so that the hot water can be supplied.

混合水栓5が開栓されると、タンク3上部の接続継手34の出湯路342を介して給湯管4に湯が流通する。混合水栓5には、給水管2から分岐した分岐給水管26が接続されているので、給水管2から給水の一部が分流し、湯と水とが合流して混合水栓5から温水が流出する。給湯管4内を湯が流通する量に応じて、給水管2からタンク3内に水が供給される。混合水栓5が再び閉栓されると給湯管4内の湯の流通が停止し、給水管2からタンク3への水の流入も停止する。 When the mixing faucet 5 is opened, hot water flows to the hot water supply pipe 4 through the hot water outlet 342 of the connecting joint 34 on the upper part of the tank 3. Since the branched water supply pipe 26 branched from the water supply pipe 2 is connected to the mixing faucet 5, a part of the water supply is separated from the water supply pipe 2, the hot water and the water are merged, and the hot water is warm water from the mixing faucet 5. Leaks out. Water is supplied from the water supply pipe 2 into the tank 3 according to the amount of hot water flowing through the hot water supply pipe 4. When the mixing faucet 5 is closed again, the flow of hot water in the hot water supply pipe 4 is stopped, and the inflow of water from the water supply pipe 2 to the tank 3 is also stopped.

タンク3内の水を加熱する際、密閉されたタンク3内が所定温度よりも高温になった時に、タンク3の上部に気泡(エア)が発生する。タンク3の上部にエアが溜まった状態で水栓の蛇口を開くと、吐水中にエアが混入することで整流性が損なわれ、吐水が乱れる懸念がある。このような吐水の乱れを防ぐために、エア抜きが行われる。具体的には、タンク3上部に設けられたサーミスタ33が所定値以上の温度を検知したとき、制御部においてタンク3内の溶存空気が気化し始めたと判定され、電磁弁70を開弁する制御が行われる。電磁弁70が開弁することにより、タンク3内のエアが接続継手34のエア抜き路340を介してタンク3に連通しているエア抜き管6に設けられた逆止弁61を通過してエア抜き管6の下流端に設けられた排水口9から排出される。このとき、接続継手34のエア抜き路340は出湯路342よりも上方、すなわち、タンク3の上部に位置するので、湯が混入するのを防ぎながらタンク3内の上部に溜まったエアを効率良く排出できる。 When the water in the tank 3 is heated, bubbles (air) are generated in the upper part of the tank 3 when the temperature inside the sealed tank 3 becomes higher than a predetermined temperature. If the faucet of the faucet is opened with air accumulated in the upper part of the tank 3, rectification is impaired due to air being mixed into the spouting water, and there is a concern that the spouting water may be disturbed. Air bleeding is performed to prevent such disturbance of water discharge. Specifically, when the thermistor 33 provided on the upper part of the tank 3 detects a temperature equal to or higher than a predetermined value, the control unit determines that the dissolved air in the tank 3 has begun to vaporize, and controls to open the solenoid valve 70. Is done. When the solenoid valve 70 opens, the air in the tank 3 passes through the check valve 61 provided in the air bleeding pipe 6 communicating with the tank 3 via the air bleeding path 340 of the connecting joint 34. It is discharged from the drain port 9 provided at the downstream end of the air bleeding pipe 6. At this time, since the air bleeding path 340 of the connection joint 34 is located above the hot water outlet 342, that is, above the tank 3, the air accumulated in the upper part of the tank 3 is efficiently removed while preventing hot water from being mixed. Can be discharged.

膨張水は、タンク3内の水を加熱する際にタンク3内の水の体積が膨張することで発生する。膨張水は、逃し弁80の設定圧力を超えた体積分が随時排水口9から排出される。膨張水排水管8は給水管2から分岐しているため、排水口9から排出される膨張水の温度は高くなりにくい。しかし、加熱されたタンク内の湯が膨張水排出により給水側に下がってくることで、膨張水温が徐々に上がってくる場合がある。そこで、サーミスタ32、33によりタンク3内の温度を検知して、所定温度(例えば、84度)以上となったときに、制御部は電磁弁70を開弁する頻度を上げる制御を行う。電磁弁70を開弁することで分岐給水管29からの水が排出されるため、膨張水排水管8の下流側を冷却することができる。また、タンク3内にも給水されるため、タンク3内の湯が給水側に下がってきているのを押し上げて膨張水の排出温度を下げることができる。タンク3内が所定温度に達するまではエア抜きのために電磁弁70をある頻度で開弁しているが、所定温度以上になってからは膨張水排水管8の冷却をする目的が加わるため、電磁弁70の開弁頻度を上げる制御を行う。 The expanded water is generated by expanding the volume of water in the tank 3 when the water in the tank 3 is heated. As for the expanded water, the volume integral exceeding the set pressure of the relief valve 80 is discharged from the drain port 9 at any time. Since the expanded water drain pipe 8 is branched from the water supply pipe 2, the temperature of the expanded water discharged from the drain port 9 is unlikely to rise. However, the temperature of the expanded water may gradually rise as the hot water in the heated tank falls to the water supply side due to the discharge of the expanded water. Therefore, the thermistors 32 and 33 detect the temperature inside the tank 3, and when the temperature exceeds a predetermined temperature (for example, 84 degrees), the control unit controls to increase the frequency of opening the solenoid valve 70. Since the water from the branch water supply pipe 29 is discharged by opening the solenoid valve 70, the downstream side of the expanded water drainage pipe 8 can be cooled. Further, since water is also supplied to the tank 3, the hot water in the tank 3 can be pushed up to the water supply side to lower the discharge temperature of the expanded water. The solenoid valve 70 is opened at a certain frequency to bleed air until the inside of the tank 3 reaches a predetermined temperature, but after the temperature exceeds the predetermined temperature, the purpose of cooling the expanded water drain pipe 8 is added. , Control is performed to increase the valve opening frequency of the solenoid valve 70.

次に、貯湯式温水器1では、湯を供給可能な状態を保つために、タンク3内に十分な量の湯を確保している。しかし、例えば、夜間や休日等、貯湯式温水器1の使用頻度が低下し、タンク3内の湯が長時間消費されずに貯留される場合がある。このような場合、湯の衛生状態を保つために、混合水栓5の操作とは独立してタンク3内の湯を放出する湯入れ替え処理が行われる。 Next, in the hot water storage type water heater 1, a sufficient amount of hot water is secured in the tank 3 in order to maintain a state in which hot water can be supplied. However, for example, at night or on holidays, the frequency of use of the hot water storage type water heater 1 may decrease, and the hot water in the tank 3 may be stored without being consumed for a long time. In such a case, in order to maintain the sanitary condition of the hot water, a hot water replacement process for discharging the hot water in the tank 3 is performed independently of the operation of the mixing faucet 5.

湯入れ替え処理は、制御部において、混合水栓5の不使用時間やフローセンサ25により検知される流水量に基づき、所定の条件を満たしたときに行われる。湯入れ替え処理の所定の条件が満たされたときに、制御部の制御により電磁弁70が開弁される。電磁弁70が開弁されると湯入替管6内に湯が流通して、排水口9から排出される。このとき、エア抜きの排水時と同様に給水管2の水が分岐給水管29を介して流通するので、湯の温度が低下して温水として排水口9から排水される。 The hot water replacement process is performed when a predetermined condition is satisfied in the control unit based on the non-use time of the mixing faucet 5 and the amount of flowing water detected by the flow sensor 25. When the predetermined condition of the hot water replacement process is satisfied, the solenoid valve 70 is opened under the control of the control unit. When the solenoid valve 70 is opened, hot water flows into the hot water replacement pipe 6 and is discharged from the drain port 9. At this time, since the water in the water supply pipe 2 circulates through the branch water supply pipe 29 as in the case of draining the air, the temperature of the hot water drops and the water is drained from the drain port 9 as hot water.

湯入れ替え処理は、フローセンサ25により検知された給水管2の流水量が所定量となった場合、あるいはタンク3内のサーミスタ33の検知温度が所定値以下となった場合に、制御部により電磁弁70を閉じる処理が行われて終了する。 The hot water replacement process is performed by the control unit when the amount of water flowing through the water supply pipe 2 detected by the flow sensor 25 reaches a predetermined amount, or when the temperature detected by the thermistor 33 in the tank 3 falls below a predetermined value. The process of closing the valve 70 is performed and the process ends.

一方、貯湯式温水器1のメンテナンス時や交換時にはタンク3内の水を全て抜く水抜き処理が行われる。なお、タンク3内の空焚きを防止する為、水抜き処理時はあらかじめ電源を切ることで加熱部の動作を停止させておく必要がある。水抜き処理を行う場合、使用者は、手動により給水栓20を閉じ、且つ逃し弁80を操作して開弁する。水抜管8はタンク3の下方に位置するので逃し弁80の開弁操作により自然と排水口9から排水される。 On the other hand, at the time of maintenance or replacement of the hot water storage type water heater 1, a water draining process is performed to drain all the water in the tank 3. In addition, in order to prevent empty heating in the tank 3, it is necessary to stop the operation of the heating unit by turning off the power in advance during the drainage process. When performing the drainage process, the user manually closes the water tap 20 and operates the relief valve 80 to open the valve. Since the drainage pipe 8 is located below the tank 3, the drainage pipe 8 is naturally drained from the drainage port 9 by opening the relief valve 80.

本実施形態に係る貯湯式温水器1によれば、水抜管8が膨張水排水管8と同じ管で構成されているため、使用頻度が少ない水抜管8を膨張水排水管8と共用できる。したがって、製造コストを抑え、且つメンテナンスが容易な貯湯式温水器1を提供できる。また、タンク3下において、水抜管8の設置スペースを少なくすることができる。 According to the hot water storage type water heater 1 according to the present embodiment, since the drainage pipe 8 is composed of the same pipe as the expansion water drainage pipe 8, the drainage pipe 8 which is rarely used can be shared with the expansion water drainage pipe 8. Therefore, it is possible to provide the hot water storage type water heater 1 which suppresses the manufacturing cost and is easy to maintain. Further, the installation space of the drain pipe 8 can be reduced under the tank 3.

本実施形態に係る貯湯式温水器1によれば、一部品からなる接続継手34に出湯路342とエア抜き路340とを備えるので、タンク3の上部に一つの接続継手34を設けることにより、出湯とエア抜きとを独立して行うことができる。このため、接続継手34の部品点数を抑えることができ、軽量化及び部品コストを削減可能な接続継手34を提供できる。 According to the hot water storage type water heater 1 according to the present embodiment, the connecting joint 34 made of one component is provided with the hot water outlet 342 and the air bleeding passage 340. Therefore, by providing one connecting joint 34 on the upper part of the tank 3. Hot water and air bleeding can be performed independently. Therefore, the number of parts of the connection joint 34 can be suppressed, and the connection joint 34 capable of reducing the weight and the cost of the parts can be provided.

本実施形態に係る貯湯式温水器1によれば、出湯路342の上流側の開口がエア抜き路340の上流側の開口よりも低い位置で採湯可能となる。したがって、タンク3の上部に溜まるエアを効率良く排出でき、かつ出湯路342にエアが混入することを抑えることができる。また、タンク3の開口が一つであっても、吐水とエアを確実に分離できる。 According to the hot water storage type water heater 1 according to the present embodiment, hot water can be collected at a position where the opening on the upstream side of the hot water outlet 342 is lower than the opening on the upstream side of the air vent passage 340. Therefore, the air accumulated in the upper part of the tank 3 can be efficiently discharged, and the air can be suppressed from being mixed into the hot water passage 342. Further, even if the tank 3 has only one opening, water discharge and air can be reliably separated.

本実施形態に係る貯湯式温水器1によれば、出湯路342の下流側の開口と、エア抜き路340の下流側の開口とが同じ高さで異なる方向に向かって開口しているので、2つの通路(出湯路342及びエア抜き路340)が形成された接続継手34のタンク3への挿入方向における寸法を小型化でき、タンク3の上方に接続継手34が突出する(高さ)を抑えることができる。 According to the hot water storage type water heater 1 according to the present embodiment, the opening on the downstream side of the hot water outlet 342 and the opening on the downstream side of the air vent passage 340 are opened at the same height and in different directions. The dimensions of the connecting joint 34 in which the two passages (outlet passage 342 and air bleeding passage 340) are formed in the insertion direction to the tank 3 can be miniaturized, and the connecting joint 34 projects (height) above the tank 3. It can be suppressed.

本実施形態に係る貯湯式温水器1によれば、エア抜き路340の通路径は出湯路342の通路径よりも小さいので、エア抜き路340の通路径を小さくすることで、エアの排出時の流速を上げて短時間で効率的にエアを外部に排出できる。また、接続継手34における出湯路342の通路径を大きく確保できるため、配管の圧力損失を低減し、出湯時の湯の勢いを確保することができる。 According to the hot water storage type water heater 1 according to the present embodiment, the passage diameter of the air bleeding path 340 is smaller than the passage diameter of the hot water outlet 342. Therefore, by reducing the passage diameter of the air bleeding path 340, when air is discharged. Air can be efficiently discharged to the outside in a short time by increasing the flow velocity of. Further, since the passage diameter of the hot water passage 342 in the connecting joint 34 can be secured to be large, the pressure loss of the pipe can be reduced and the momentum of the hot water at the time of hot water can be secured.

本実施形態に係る貯湯式温水器1によれば、一つの接続継手34をタンク3に取り付けることにより出湯路342とエア抜き路340とを確保できる。したがって、部品コストを抑えることができるとともに、従来、出湯用とエア抜き用と二箇所の開口が形成されていた高温沸き上げ機種専用のタンクを用いる必要がなく、部品の汎用性を高めることができる。 According to the hot water storage type water heater 1 according to the present embodiment, the hot water outlet path 342 and the air bleeding path 340 can be secured by attaching one connecting joint 34 to the tank 3. Therefore, it is possible to reduce the cost of parts, and it is not necessary to use a tank dedicated to high-temperature boiling models, which has conventionally formed two openings, one for hot water and one for air bleeding, and the versatility of parts can be improved. it can.

以上、本発明の実施形態について図面を参照して詳述したが、具体的な構成はこの実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等も含まれる。
また、上述の各実施形態及び各変形例において示した構成要素は適宜に組み合わせて構成することが可能である。
Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes and the like within a range not deviating from the gist of the present invention are also included.
In addition, the components shown in each of the above-described embodiments and modifications can be appropriately combined and configured.

接続継手は上記実施形態で示した形態に限定されない。図8及び図9に接続継手の変形例を示す。図8及び図9に示す変形例の接続継手34Aは、上流側(図8の下側)ではエア抜き路340と出湯路342とが上下方向に平行に延びて形成されているが、下流側(図8の左上部側)では、エア抜き路340が出湯路342よりも上方まで延びて出湯路342の曲折方向と同じ方向に曲折し、出湯路342の下流側開口343Aの上方にエア抜き路340の下流側開口341Aが形成されている点で、上記実施形態と異なる。本変形例の接続継手34Aを取り付ける貯湯式温水器は、給湯管4及びエア抜き管(膨張水排水管、湯入替管)6が延びる方向が同じ方向となる。本変形例でも、給湯用とエア抜き用(膨張水排水用、湯入替用)の管を個別に設ける場合に比べて、接続継手の数を減らすことができ、部品コストの低減及び製造時の手間を省くことができる。 The connection joint is not limited to the form shown in the above embodiment. 8 and 9 show a modified example of the connecting joint. In the connection joint 34A of the modified example shown in FIGS. 8 and 9, the air vent passage 340 and the hot water discharge passage 342 are formed so as to extend in parallel in the vertical direction on the upstream side (lower side of FIG. 8), but on the downstream side. (On the upper left side of FIG. 8), the air bleeding passage 340 extends above the hot water passage 342 and bends in the same direction as the bending direction of the hot water passage 342, and air is bleeding above the downstream opening 343A of the hot water passage 342. It differs from the above embodiment in that a downstream opening 341A of the road 340 is formed. In the hot water storage type water heater to which the connection joint 34A of this modification is attached, the hot water supply pipe 4 and the air bleeding pipe (expanded water drain pipe, hot water replacement pipe) 6 extend in the same direction. In this modified example as well, the number of connecting joints can be reduced as compared with the case where the pipes for hot water supply and air bleeding (for expanding water drainage and hot water replacement) are provided separately, and the cost of parts can be reduced and the manufacturing time can be reduced. You can save time and effort.

上記実施形態及び変形例の接続継手では、出湯路とエア抜き路とが上流側では下方に向かって開口する例を挙げたが、エア抜き路の上流側の開口は出湯路の上流側の開口よりも上方に形成されればよい。例えば、図示は省略するが、出湯路の上流側の開口は下方に向かって開口するが、エア抜き路の上流側の開口は側方に向かって開口するようにしてもよい。もしくは、接続継手をタンクの上部の側面から挿入する場合、エア抜き路が出湯路よりも上側に形成され、エア抜き路の上流側の開口が出湯路の上流側の開口よりも上方に形成されている構成であってもよい。この場合は、接続継手自体に段差を設けるなどして2つの開口を上下方向に離間させなくてよい。 In the connection joint of the above embodiment and the modified example, the example in which the hot water passage and the air bleeding passage are opened downward on the upstream side is given, but the opening on the upstream side of the air bleeding passage is the opening on the upstream side of the hot water outlet. It may be formed above. For example, although not shown, the opening on the upstream side of the hot water passage opens downward, but the opening on the upstream side of the air bleeding passage may open toward the side. Alternatively, when the connection joint is inserted from the upper side surface of the tank, the air vent passage is formed above the hot water passage, and the opening on the upstream side of the air vent passage is formed above the opening on the upstream side of the hot water passage. It may be the configuration that is used. In this case, it is not necessary to separate the two openings in the vertical direction by providing a step in the connecting joint itself.

上記実施形態及び変形例の接続継手では、出湯路342及びエア抜き路340の断面がそれぞれ円形の例を示したが、出湯路とエア抜き路の構成はこれに限らない。細い接続継手内を有効活用するために、例えば出湯路の断面を幅広の楕円にして通路断面積を増やし、湯の勢いを確保してもよい。 In the connection joints of the above-described embodiment and the modified example, examples are shown in which the cross sections of the hot water passage 342 and the air bleeding passage 340 are circular, respectively, but the configurations of the hot water passage and the air bleeding passage are not limited to this. In order to effectively utilize the inside of the narrow connecting joint, for example, the cross section of the hot water passage may be made a wide ellipse to increase the cross-sectional area of the passage to secure the momentum of the hot water.

上記実施形態では、給湯水栓として、混合水栓5のみが設けられた例を示しているが、熱湯のみが吐出される熱湯水栓を別途設けてもよい。この場合、給湯管4の分岐路を設けて熱湯水栓と接続すればよい。 In the above embodiment, an example in which only the mixing faucet 5 is provided as the hot water faucet is shown, but a hot water faucet for discharging only hot water may be separately provided. In this case, a branch path of the hot water supply pipe 4 may be provided to connect to the hot water faucet.

本実施形態では、膨張水排水管8と、水抜管8と、エア抜き管6と、湯入替管6とが同じ排水口9に接続されている例を示した。しかし、水抜管、膨張水排水管、及びエア抜き管、湯入替管の構成は上記実施形態に限定されず、公知の構成であってもよい。 In this embodiment, an example is shown in which the expansion water drainage pipe 8, the drainage pipe 8, the air bleeding pipe 6, and the hot water replacement pipe 6 are connected to the same drainage port 9. However, the configurations of the drainage pipe, the expanded water drainage pipe, the air drainage pipe, and the hot water replacement pipe are not limited to the above embodiment, and may be known configurations.

上記実施形態では、壁に固定する貯湯式温水器1の例を示したが、シンクの下方に配置可能なスペースがある場合は、床に置いて使用する貯湯式温水器としても使用できる。 In the above embodiment, an example of the hot water storage type water heater 1 fixed to the wall is shown, but if there is a space that can be arranged below the sink, it can also be used as a hot water storage type water heater that is used by placing it on the floor.

1 貯湯式温水器
2 給水管
3 タンク
4 給湯管
34、34A 接続継手
340、340A エア抜き路
342 出湯路
1 Hot water storage type water heater 2 Water supply pipe 3 Tank 4 Hot water supply pipe 34, 34A Connection joint 340, 340A Air bleeding path 342 Outlet channel

Claims (5)

タンクに取り付けられる接続継手であって、
貯湯されているタンク内の湯が通流する出湯路と、
前記タンク内で発生するエアを脱気するためのエア抜き路と、
を備え
前記エア抜き路は、前記タンク内への給水を行いつつ前記タンク内の湯を排出して前記タンク内の湯水を入れ替える際に、前記タンク内の湯を排出するための管路を兼ねることを特徴とする接続継手。
A fitting that can be attached to a tank
A hot water outlet through which the hot water in the tank where the hot water is stored flows, and
An air bleeding path for degassing the air generated in the tank,
Equipped with a,
Said air vent passage, when to drain the hot water in the tank while performing water supply to the tank replacing the hot water in the tank, Rukoto also serves as a conduit for discharging the hot water in the tank A connecting joint characterized by.
前記タンクに前記接続継手が取り付けられた状態において前記出湯路の前記タンク側の開口が前記エア抜き路の前記タンク側の開口よりも下方に位置するように、前記タンク側における前記出湯路の開口と前記エア抜き路の開口とが離間して形成されている
請求項1に記載の接続継手。
The opening of the hot water passage on the tank side so that the opening on the tank side of the hot water passage is located below the opening on the tank side of the air bleeding passage when the connection joint is attached to the tank. The connection joint according to claim 1, wherein the air vent passage is separated from the opening of the air vent passage.
前記タンクに前記接続継手が取り付けられた状態において、前記出湯路の下流側の開口と、前記エア抜き路の下流側の開口とが同じ高さで異なる方向に向かって開口している
請求項1または請求項2に記載の接続継手。
Claim 1 in which the opening on the downstream side of the hot water passage and the opening on the downstream side of the air bleeding passage are opened at the same height and in different directions in a state where the connection joint is attached to the tank. Alternatively, the connecting joint according to claim 2.
前記エア抜き路の通路径は前記出湯路の通路径よりも小さい
請求項1から請求項3のいずれか一項に記載の接続継手。
The connection joint according to any one of claims 1 to 3, wherein the passage diameter of the air bleeding passage is smaller than the passage diameter of the hot water outlet.
給水管から供給された水を加熱して貯湯するタンクと、
前記タンクの上部に取り付けられる請求項1から請求項4のいずれか一項に記載の接続継手と、
前記接続継手の前記出湯路に接続される出湯管と、
前記接続継手のエア抜き路に接続され、湯入替管を兼ねるエア抜き管と、
を備えることを特徴とする貯湯式温水器。
A tank that heats and stores the water supplied from the water supply pipe,
The connection joint according to any one of claims 1 to 4, which is attached to the upper part of the tank.
The hot water pipe connected to the hot water passage of the connecting joint and
Connected to said air vent passage of the connection joint, the air vent pipe Ru also serves as a water replacement pipe,
A hot water storage type water heater characterized by being equipped with.
JP2016174031A 2016-09-06 2016-09-06 Connection joint and hot water storage type water heater Active JP6769786B2 (en)

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