JP6309747B2 - Hot water heater - Google Patents

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JP6309747B2
JP6309747B2 JP2013246752A JP2013246752A JP6309747B2 JP 6309747 B2 JP6309747 B2 JP 6309747B2 JP 2013246752 A JP2013246752 A JP 2013246752A JP 2013246752 A JP2013246752 A JP 2013246752A JP 6309747 B2 JP6309747 B2 JP 6309747B2
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hot water
water
mixing
water storage
valve
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敏行 河原
敏行 河原
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Lixil Corp
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Description

本発明は、貯湯式温水器に関する。   The present invention relates to a hot water storage type water heater.

従来、加熱した湯を貯湯タンク内に貯湯し、この貯湯タンク内から湯を出湯する貯湯式温水器が知られている。この貯湯式温水器では、不使用状態が続くと、長時間に亘って貯湯タンク内に湯が滞留することになり、特に飲料用の貯湯式温水器としては衛生上好ましくない。そこで、使用後、所定時間が経過した後に、排出弁を開いて貯湯タンク内の湯を排出し、貯湯タンク内の湯を入れ替える貯湯式温水器が提案されている（例えば、特許文献１、２参照）。   2. Description of the Related Art Conventionally, a hot water heater that stores hot water in a hot water storage tank and discharges the hot water from the hot water storage tank is known. In this hot water heater, when the unused state continues, hot water stays in the hot water storage tank for a long time, which is not preferable in terms of hygiene, particularly as a hot water heater for beverages. In view of this, hot water storage water heaters have been proposed in which, after a predetermined time has elapsed after use, the discharge valve is opened to discharge the hot water in the hot water storage tank, and the hot water in the hot water storage tank is replaced (for example, Patent Documents 1 and 2). reference).

また、貯湯式温水器の他の例として、図５に示す構造の貯湯式温水器１が知られている。図５に示す貯湯式温水器１は、ヒーター２０で沸かし上げられた貯湯タンク２内の湯の衛生性を確保するため、設定した期間毎に貯湯タンク２内の湯を自動で入れ替える機能を有する。この場合、排水管３に貯湯タンク２内の高温の湯（例えば６０〜９０℃）をそのまま排出すると、排水管部品に劣化や損傷が生じるおそれがあるため、温度を下げて排水している。具体的には、貯湯タンク２内の湯と、給水源からストレーナ６や減圧弁７を介して給水された水とを混合して洗浄用等の雑用に供するための給湯用混合弁４を介することで、温度を下げてから電磁弁５を開いて排出している。   As another example of the hot water storage water heater, a hot water storage water heater 1 having a structure shown in FIG. 5 is known. The hot water storage water heater 1 shown in FIG. 5 has a function of automatically replacing the hot water in the hot water storage tank 2 every set period in order to ensure the hygiene of the hot water in the hot water storage tank 2 boiled by the heater 20. . In this case, if hot water (for example, 60 to 90 ° C.) in the hot water storage tank 2 is discharged to the drain pipe 3 as it is, the drain pipe parts may be deteriorated or damaged. Specifically, the hot water in the hot water storage tank 2 and the water supplied from the water supply source through the strainer 6 and the pressure reducing valve 7 are mixed and supplied through a hot water supply mixing valve 4 for use in miscellaneous purposes such as washing. Thus, after the temperature is lowered, the electromagnetic valve 5 is opened and discharged.

実開平５−９４６４９号公報Japanese Utility Model Publication No. 5-94649 特開２０１２−２４７０９８号公報JP 2012-247098 A

ところで、近年、給湯温度のさらなる安全性が求められており、給湯用混合弁４の給湯温度設定（例えば５０℃）を下げることが望まれている。しかしながら、図５に示す構造では、給湯用混合弁４の給湯温度設定を下げると（例えば４０℃）、特に夏場等の給水温度が高い時期には、湯に対する水の混合比率が高くなるため、貯湯タンク２内の湯を入れ替える際の排水量が増加する。   Incidentally, in recent years, further safety of the hot water supply temperature has been demanded, and it is desired to lower the hot water supply temperature setting (for example, 50 ° C.) of the hot water supply mixing valve 4. However, in the structure shown in FIG. 5, when the hot water supply temperature setting of the hot water supply mixing valve 4 is lowered (for example, 40 ° C.), the mixing ratio of water to hot water becomes high, especially at the high water supply temperature such as in summer. The amount of drainage when the hot water in the hot water storage tank 2 is replaced increases.

本発明は上記の事情に鑑みてなされたものであり、その目的は、給湯用混合弁の給湯温度設定を下げた場合であっても、貯湯タンク内の湯を入れ替える際の排水量が増加するのを防止できる貯湯式温水器を提供することにある。   The present invention has been made in view of the above circumstances, and its purpose is to increase the amount of drainage when replacing hot water in the hot water storage tank even when the hot water temperature setting of the hot water mixing valve is lowered. It is to provide a hot water storage type water heater that can prevent the above.

（１）上記目的を達成するための本発明は、湯を貯湯する貯湯タンク（例えば、後述の貯湯タンク６１）と、前記貯湯タンク内の湯と、水とを混合して給湯するための給湯用混合弁（例えば、後述の給湯用混合弁６２）と、を備える貯湯式温水器において、前記給湯用混合弁を介さずに、前記貯湯タンク内の湯と、水とを混合して排水管（例えば、後述の排水管４１）に排出する混合部（例えば、後述の混合部６９）を備える貯湯式温水器（例えば、後述の貯湯式温水器１１）を提供する。   (1) The present invention for achieving the above object is to provide a hot water storage tank for storing hot water (for example, a hot water storage tank 61 described later), hot water in the hot water storage tank, and hot water for mixing and supplying hot water. In a hot water storage water heater comprising a mixing valve (for example, a hot water mixing valve 62 described later), the hot water in the hot water storage tank is mixed with water without passing through the hot water mixing valve, and a drain pipe A hot water storage water heater (for example, a hot water storage type hot water heater 11 described later) including a mixing section (for example, a mixing section 69 described later) for discharging to (for example, a drain pipe 41 described later) is provided.

（１）の発明では、給湯用混合弁を介さずに、貯湯タンク内の湯と、水とを混合して排水管に排出する混合部を備える。これにより、給湯用混合弁を介さずに、貯湯タンク内の湯と水とを混合させて排出できる。そのため、給湯用混合弁の設定温度を例えば４０℃に下げた場合であっても、混合部における排水の設定温度を例えばより高い５０℃とすることで、貯湯タンク内の湯を入れ替える際の排水量が増加するのを防止できる。ひいては節水することができ、ランニングコストを低減できる。   In invention of (1), the mixing part which mixes the hot water in a hot water storage tank and water, and discharges it to a drain pipe is provided, without passing through the mixing valve for hot water supply. Thereby, the hot water and water in the hot water storage tank can be mixed and discharged without going through the hot water mixing valve. Therefore, even when the set temperature of the mixing valve for hot water supply is lowered to 40 ° C., for example, the amount of drainage when replacing the hot water in the hot water storage tank by setting the set temperature of the waste water in the mixing section to 50 ° C., for example, higher Can be prevented from increasing. As a result, water can be saved, and running costs can be reduced.

（２）前記混合部は、流入する湯と水とを一定比率で混合可能であり、前記混合部の流出側には、開閉可能な開閉弁（例えば、後述の電磁弁７０）が設けられていることが好ましい。   (2) The mixing unit can mix inflowing hot water and water at a constant ratio, and an open / close valve (for example, an electromagnetic valve 70 described later) is provided on the outflow side of the mixing unit. Preferably it is.

（２）の発明では、混合部を、流入する湯と水とを一定比率で混合可能に構成するとともに、混合部の流出側に、開閉可能な開閉弁を設ける。これにより、開閉弁を開閉することによって、給湯用混合弁の設定温度によらずに、排水量を抑えながら貯湯タンク内の湯を入れ替えできる。   In the invention of (2), the mixing section is configured so that hot water and water flowing in can be mixed at a constant ratio, and an openable / closable valve is provided on the outflow side of the mixing section. Thereby, by opening and closing the on-off valve, the hot water in the hot water storage tank can be replaced while suppressing the amount of drainage regardless of the set temperature of the hot water supply mixing valve.

（３）前記混合部は、流入する湯と水との混合比率を変更可能な排出用混合弁（例えば、後述の排出用混合弁１０２）を備え、前記混合部の流出側には、開閉可能な開閉弁（例えば、後述の電磁弁７０）が設けられていることが好ましい。   (3) The mixing unit includes a discharge mixing valve (for example, a discharge mixing valve 102 described later) capable of changing the mixing ratio of the flowing hot water and water, and can be opened and closed on the outflow side of the mixing unit. It is preferable that a simple on-off valve (for example, an electromagnetic valve 70 described later) is provided.

（３）の発明では、混合部に、流入する湯と水との混合比率を変更可能な排出用混合弁を設けるとともに、混合部の流出側に、開閉可能な開閉弁を設ける。これにより、開閉弁を開閉することによって、給湯用混合弁の設定温度によらずに、排水量を抑えながら貯湯タンク内の湯を入れ替えできる。また、混合部に設けた排出用混合弁により、湯と水との混合比率を変更することで、排水温度を調整できる。   In the invention of (3), the mixing part is provided with a discharge mixing valve capable of changing the mixing ratio of the flowing hot water and water, and provided with an openable / closable valve on the outflow side of the mixing part. Thereby, by opening and closing the on-off valve, the hot water in the hot water storage tank can be replaced while suppressing the amount of drainage regardless of the set temperature of the hot water supply mixing valve. Moreover, the waste water temperature can be adjusted by changing the mixing ratio of hot water and water by the discharge mixing valve provided in the mixing section.

（４）前記混合部の湯流入側と水流入側には、それぞれ逆止弁（例えば、後述の逆止弁６７，６８）が設けられていることが好ましい。   (4) It is preferable that check valves (for example, check valves 67 and 68 described later) are provided on the hot water inflow side and the water inflow side of the mixing unit, respectively.

（４）の発明では、混合部の湯流入側と水流入側に、それぞれ逆止弁を設ける。これにより、混合部からの逆流を確実に防止することができる。   In invention of (4), a check valve is provided in the hot water inflow side and the water inflow side of a mixing part, respectively. Thereby, the backflow from a mixing part can be prevented reliably.

（５）前記混合部は、流入する湯と水とを一定比率で混合可能であり、前記混合部の湯流入側と水流入側には、それぞれ開閉可能な開閉弁（例えば、電磁弁２０２，２０３）が設けられていることが好ましい。   (5) The mixing unit can mix inflowing hot water and water at a constant ratio, and on the hot water inflow side and the water inflow side of the mixing unit, open / close valves (for example, electromagnetic valves 202, 203) is preferably provided.

（５）の発明では、混合部を、流入する湯と水とを一定比率で混合可能に構成するとともに、上述の発明の逆止弁に代えて、混合部の湯流入側と水流入側に、それぞれ開閉可能な開閉弁を設ける。これにより、固着等による詰まりが比較的生じ易い逆止弁に比べて耐久性の高い開閉弁を用いることで、より耐久性が高く信頼性の高い貯湯式温水器が得られる。   In the invention of (5), the mixing section is configured to be able to mix the flowing hot water and water at a constant ratio, and instead of the check valve of the above-described invention, the mixing section is arranged on the hot water inflow side and the water inflow side. Open / close valves that can be opened and closed are provided. As a result, a hot water heater with higher durability and higher reliability can be obtained by using a highly durable on-off valve as compared with a check valve that is relatively easily clogged with sticking or the like.

本発明によれば、給湯用混合弁の給湯温度設定を下げた場合であっても、貯湯タンク内の湯を入れ替える際の排水量が増加するのを防止できる貯湯式温水器を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where the hot_water | molten_metal supply temperature setting of the hot water supply mixing valve is lowered | hung, the hot water storage type | formula water heater which can prevent the drainage amount at the time of replacing the hot water in a hot water storage tank can be provided.

本発明の第１実施形態に係る貯湯式温水器の外観を示す斜視図である。It is a perspective view which shows the external appearance of the hot water storage type water heater which concerns on 1st Embodiment of this invention. 上記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 the said embodiment. 本発明の第２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 2nd Embodiment of this invention. 本発明の第３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 3rd Embodiment of this invention. 従来の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 conventional hot water storage type water heater.

以下、本発明の実施形態について、図面を参照しながら詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

＜第１実施形態＞
図１は、本発明の第１実施形態に係る貯湯式温水器１１の外観を示す斜視図であり、本貯湯式温水器１１をシンク１２に適用した例を示す。なお、図１において、シンク１２は透視図で表している。
貯湯式温水器１１は、ケーシング３１内に後述するヒーター付の貯湯タンク（図示せず）を備える。図１に示すように、貯湯式温水器１１は、シンク１２の内部に配置されており、シンク１２の内壁に配設された電源コンセント５１に電源ケーブル５２を接続し、ケーシング３１の前面に設けられた電源スイッチ５３をＯＮすることで作動する。 <First Embodiment>
FIG. 1 is a perspective view showing the appearance of a hot water heater 11 according to the first embodiment of the present invention, and shows an example in which the hot water heater 11 is applied to a sink 12. In FIG. 1, the sink 12 is shown in a perspective view.
The hot water storage water heater 11 includes a hot water storage tank (not shown) with a heater, which will be described later, in the casing 31. As shown in FIG. 1, the hot water storage water heater 11 is disposed inside the sink 12, and a power cable 52 is connected to a power outlet 51 disposed on the inner wall of the sink 12, and is provided on the front surface of the casing 31. The power switch 53 is turned on to operate.

図１に示すように、貯湯式温水器１１の周辺には、熱湯用単水栓３２と、混合水栓３３と、止水栓３４と、排水器具３５と、熱湯管３６と、出湯管３７と、同圧給水管３８と、給水管３９と、排水ホース４０と、が設けられている。   As shown in FIG. 1, there are a single hot water tap 32, a mixing tap 33, a stop cock 34, a drainage device 35, a hot water pipe 36, and a hot water pipe 37 around the hot water heater 11. And the same pressure water supply pipe 38, the water supply pipe 39, and the drainage hose 40 are provided.

熱湯用単水栓３２と混合水栓３３は、シンク１２のシンク本体１３の近傍に配設されている。止水栓３４は、シンク１２の内壁に配設されている。排水器具３５は、シンク本体１３の排水口４１ａから下方に延びた排水管４１の途中に接続されている。   The hot water single water tap 32 and the mixed water tap 33 are disposed in the vicinity of the sink body 13 of the sink 12. The water stop cock 34 is disposed on the inner wall of the sink 12. The drainage device 35 is connected in the middle of the drainage pipe 41 extending downward from the drainage port 41 a of the sink body 13.

熱湯管３６は、一端が熱湯用単水栓３２に接続され、他端が貯湯式温水器１１のケーシング３１の上面に接続されている。出湯管３７は、一端が混合水栓３３に接続され、他端が貯湯式温水器１１のケーシング３１の上面に接続されている。同圧給水管３８は、一端が混合水栓３３に接続され、他端が貯湯式温水器１１のケーシング３１の上面に接続されている。給水管３９は、一端が止水栓３４に接続され、他端が貯湯式温水器１１のケーシング３１の上面に接続されている。排水ホース４０は、一端が排水器具３５に接続され、他端が貯湯式温水器１１のケーシング３１の上面に接続されている。   One end of the hot water pipe 36 is connected to the single water tap 32 for hot water, and the other end is connected to the upper surface of the casing 31 of the hot water storage water heater 11. One end of the hot water outlet pipe 37 is connected to the mixing faucet 33, and the other end is connected to the upper surface of the casing 31 of the hot water storage type hot water heater 11. One end of the same-pressure water supply pipe 38 is connected to the mixing faucet 33, and the other end is connected to the upper surface of the casing 31 of the hot water storage water heater 11. One end of the water supply pipe 39 is connected to the stop cock 34, and the other end is connected to the upper surface of the casing 31 of the hot water storage water heater 11. The drain hose 40 has one end connected to the drainage device 35 and the other end connected to the upper surface of the casing 31 of the hot water storage water heater 11.

次に、本実施形態に係る貯湯式温水器１１の内部構成について説明する。図２は、本実施形態に係る貯湯式温水器１１の内部構成を示す図である。
図２に示すように、貯湯式温水器１１は、ケーシング３１内に、貯湯タンク６１と、給湯用混合弁６２と、逆止弁６３と、ストレーナ６４と、逆止弁６５と、減圧弁６６と、逆止弁６７，６８と、混合部６９と、電磁弁７０と、逃し弁７２と、サーミスタ７３と、水抜き弁７４と、を備える。 Next, the internal configuration of the hot water storage type water heater 11 according to the present embodiment will be described. FIG. 2 is a diagram illustrating an internal configuration of the hot water storage type water heater 11 according to the present embodiment.
As shown in FIG. 2, the hot water heater 11 includes a hot water storage tank 61, a hot water supply mixing valve 62, a check valve 63, a strainer 64, a check valve 65, and a pressure reducing valve 66 in a casing 31. A check valve 67, 68, a mixing portion 69, an electromagnetic valve 70, a relief valve 72, a thermistor 73, and a drain valve 74.

給水管３９から供給される水は、ストレーナ６４で水中のゴミが除去され、逆止弁６５を流通し、減圧弁６６で減圧された後、給水管３９を流通して貯湯タンク６１内に供給される。   The water supplied from the water supply pipe 39 is removed from the water by the strainer 64, circulates through the check valve 65, depressurized by the pressure reducing valve 66, circulates through the water supply pipe 39, and is supplied into the hot water storage tank 61. Is done.

貯湯タンク６１は、内部にヒーター７１を備える。水が供給された貯湯タンク６１では、このヒーター７１に通電することによって、６０〜９０℃の湯が沸かされる。貯湯タンク６１で沸かされた熱湯は、熱湯管３６を流通して熱湯用単水栓３２（図１参照）に供給され、熱湯用単水栓３２から流出することで、飲用熱湯として利用される。   The hot water storage tank 61 includes a heater 71 inside. In the hot water storage tank 61 supplied with water, hot water of 60 to 90 ° C. is boiled by energizing the heater 71. Hot water boiled in the hot water storage tank 61 flows through the hot water pipe 36, is supplied to the single tap for hot water 32 (see FIG. 1), and flows out of the single tap for hot water 32, thereby being used as hot drinking water. .

また、熱湯管３６の分岐部３６ａで分岐した熱湯分岐管８１には、逆止弁６３と給湯用混合弁６２が設けられている。従って、貯湯タンク６１で沸かされた熱湯の一部が、熱湯管３６から熱湯分岐管８１へ分流し、逆止弁６３を流通した後、給湯用混合弁６２に供給される。
一方、給水管３９の分岐部３９ａで分岐した給水分岐管８２には、給水管３９から給水の一部が分流する。給水分岐管８２に分流した給水は、給湯用混合弁６２に供給される。これにより、給湯用混合弁６２では、熱湯分岐管８１を流通して供給された熱湯と、給水分岐管８２を流通して供給された水とが混合されることで、給湯用混合弁６２の設定温度（例えば４０℃）の湯となる。 A hot water branch pipe 81 branched at the branch portion 36a of the hot water pipe 36 is provided with a check valve 63 and a hot water mixing valve 62. Therefore, a part of the hot water boiled in the hot water storage tank 61 is diverted from the hot water pipe 36 to the hot water branch pipe 81 and flows through the check valve 63 and then supplied to the hot water mixing valve 62.
On the other hand, a part of the water supply is diverted from the water supply pipe 39 to the water supply branch pipe 82 branched at the branch portion 39 a of the water supply pipe 39. The water supplied to the water supply branch pipe 82 is supplied to the hot water supply mixing valve 62. Thereby, in the hot water supply mixing valve 62, the hot water supplied through the hot water branch pipe 81 and the water supplied through the hot water branch pipe 82 are mixed, so that the hot water supply mixing valve 62 It becomes hot water of set temperature (for example, 40 degreeC).

給湯用混合弁６２において熱湯と水が混合されて生成された湯は、出湯管３７を流通して混合水栓３３（図１参照）に供給され、混合水栓３３から流出することで、食器の洗浄等を行うための雑用給湯として利用される。   Hot water generated by mixing hot water and water in the hot water mixing valve 62 is supplied to the mixing faucet 33 (see FIG. 1) through the hot water outlet pipe 37 and flows out of the mixing faucet 33, so that tableware is obtained. It is used as a hot water supply for miscellaneous purposes for performing cleaning and the like.

給水管３９の分岐部３９ｂで分岐した同圧給水管３８には、給水管３９から給水の一部が分流する。この同圧給水は、同圧給水管３８を流通して混合水栓３３（図１参照）に供給され、混合水栓３３から流出することで、使用に供される。   A part of the water supply is diverted from the water supply pipe 39 to the same pressure water supply pipe 38 branched at the branch portion 39b of the water supply pipe 39. The same-pressure feed water is supplied to the mixing faucet 33 (see FIG. 1) through the same-pressure feed water pipe 38 and flows out of the mixing faucet 33 for use.

なお、貯湯タンク６１内で湯を沸かす際には、貯湯タンク６１内部の圧力上昇により膨張水が発生する。内圧が所定圧力を超えると逃し弁７２が開弁し、発生した膨張水は膨張水排出管８３及び排水ホース４０（図１参照）を介して、排水器具３５内の封水部に供給され、封水部内の封水となる。   In addition, when boiling water in the hot water storage tank 61, expanded water is generated due to an increase in pressure in the hot water storage tank 61. When the internal pressure exceeds a predetermined pressure, the relief valve 72 is opened, and the generated expansion water is supplied to the sealed portion in the drainage device 35 via the expansion water discharge pipe 83 and the drainage hose 40 (see FIG. 1). It becomes sealed water in the sealed part.

なお、水抜き弁７４は、貯湯タンク６１の下部と給水管３９との接続部近傍に設けられている。水抜き弁７４は、メンテナンスや凍結防止目的で設けられた図示しない給気栓を操作した後に開弁する。これにより、給水管３９内の水が外部に排出される。   The drain valve 74 is provided in the vicinity of the connecting portion between the lower part of the hot water storage tank 61 and the water supply pipe 39. The drain valve 74 is opened after operating a supply tap (not shown) provided for maintenance and freeze prevention purposes. Thereby, the water in the water supply pipe 39 is discharged outside.

また、本実施形態の貯湯式温水器１１では、熱湯管３６の分岐部３６ｂで熱湯分岐管９１が分岐しており、この熱湯分岐管９１には熱湯管３６から熱湯の一部が分流する。また、給水管３９の分岐部３９ｃでは給水分岐管９２が分岐しており、この給水分岐管９２には、給水管３９から一部の給水が分流する。熱湯分岐管９１と給水分岐管９２は、混合部６９で合流している。   Further, in the hot water storage type hot water heater 11 of the present embodiment, the hot water branch pipe 91 is branched at the branch portion 36 b of the hot water pipe 36, and a part of the hot water is diverted from the hot water pipe 36 to the hot water branch pipe 91. Further, a water supply branch pipe 92 is branched at the branch portion 39 c of the water supply pipe 39, and a part of the water supply is diverted from the water supply pipe 39 to the water supply branch pipe 92. The hot water branch pipe 91 and the feed water branch pipe 92 merge at the mixing section 69.

混合部６９は、熱湯分岐管９１と給水分岐管９２との流路合流部となっている。従って、混合部６９では、熱湯分岐管９１を流通してきた熱湯と、給水分岐管９２を流通してきた水とが混合する。この混合水は、混合部６９の流出側に設けられた電磁弁７０を介して、排水ホース４０に排出される。即ち、本実施形態の貯湯式温水器１１は、給湯用混合弁６２を介さずに、貯湯タンク６１の湯と、水とを混合して排水ホース４０に排出する混合部６９を備えている。   The mixing unit 69 is a flow path junction between the hot water branch pipe 91 and the feed water branch pipe 92. Therefore, in the mixing unit 69, the hot water that has circulated through the hot water branch pipe 91 and the water that has circulated through the feed water branch pipe 92 are mixed. This mixed water is discharged to the drainage hose 40 through an electromagnetic valve 70 provided on the outflow side of the mixing unit 69. That is, the hot water storage type water heater 11 of the present embodiment includes a mixing unit 69 that mixes the hot water in the hot water storage tank 61 and water and discharges them to the drain hose 40 without using the hot water mixing valve 62.

なお、混合部６９における湯と水の混合比は、混合水の温度が例えば５０℃となるように、予め混合部６９における湯と水の流路の径を調整して定めた一定の比率であり、例えば湯と水の比率を４：６とする。また、混合水の逆流を防止するため、混合部６９の水流入側（給水分岐管９２側）と湯流入側（熱湯分岐管９１側）には、それぞれ逆止弁６７，６８が設けられている。   The mixing ratio of hot water and water in the mixing section 69 is a constant ratio determined in advance by adjusting the diameter of the flow path of hot water and water in the mixing section 69 so that the temperature of the mixed water is 50 ° C., for example. Yes, for example, the ratio of hot water to water is 4: 6. In order to prevent the backflow of the mixed water, check valves 67 and 68 are provided on the water inflow side (water supply branch pipe 92 side) and the hot water inflow side (hot water branch pipe 91 side) of the mixing unit 69, respectively. Yes.

サーミスタ７３は、電磁弁７０の下流側に設けられている。サーミスタ７３は、異常温度検出用であり、逆止弁６７，６８が固着したとき等に生じる排水温の異常高温を検出する。サーミスタ７３により異常高温が検出されると、電磁弁７０が閉弁されることで、安全性が確保されるようになっている。   The thermistor 73 is provided on the downstream side of the electromagnetic valve 70. The thermistor 73 is used for detecting an abnormal temperature, and detects an abnormally high temperature of the drainage generated when the check valves 67 and 68 are fixed. When an abnormally high temperature is detected by the thermistor 73, the solenoid valve 70 is closed to ensure safety.

次に、本実施形態の貯湯式温水器１１の動作について、図２を参照して説明する。
まず、給水管３９からストレーナ６４及び減圧弁６６等を介して貯湯タンク６１に水が供給されると、この供給水が貯湯タンク６１に設けられたヒーター７１で沸し上げられる。この沸し上げられた熱湯（例えば６０〜９０℃）は、熱湯管３６を介して飲用熱湯として供給される。
また、熱湯の一部は熱湯分岐管８１で分流し、給水分岐管８２で分流した水と給湯用混合弁６２で混合することにより、例えば４０℃の雑用給湯として供給される。この雑用給湯は同圧給水とともに混合水栓３３（図１参照）に供給されて混合水栓３３から流出する。 Next, operation | movement of the hot water storage type water heater 11 of this embodiment is demonstrated with reference to FIG.
First, when water is supplied from the water supply pipe 39 to the hot water storage tank 61 through the strainer 64 and the pressure reducing valve 66, the supplied water is boiled by the heater 71 provided in the hot water storage tank 61. The boiled hot water (for example, 60 to 90 ° C.) is supplied as hot drinking water through the hot water pipe 36.
Further, a part of the hot water is divided by the hot water branch pipe 81 and mixed with the water divided by the water supply branch pipe 82 by the hot water mixing valve 62, thereby being supplied as hot water for miscellaneous use at 40 ° C., for example. This miscellaneous hot water is supplied to the mixing faucet 33 (see FIG. 1) together with the same-pressure feed water and flows out of the mixing faucet 33.

貯湯タンク６１内の湯を入れ替えするために排水する際には、給湯用混合弁６２は介さずに、熱湯分岐管９１で分流した湯と、給水分岐管９２で分流した水を混合部６９で混合して例えば５０℃の混合水とし、電磁弁７０を開いて排水する。また、貯湯タンク６１内で湯を沸かすことによって発生した膨張水は、逃し弁７２が開弁することで膨張水排出管８３等を介して排水されることにより、排水器具３５（図１参照）の封水部内の封水となる。   When draining water to replace the hot water in the hot water storage tank 61, the hot water branching pipe 91 and the hot water branching pipe 92 are separated from the hot water branching pipe 91 without using the hot water mixing valve 62. The mixed water is mixed at, for example, 50 ° C. and drained by opening the solenoid valve 70. Further, the expansion water generated by boiling the hot water in the hot water storage tank 61 is drained through the expansion water discharge pipe 83 or the like when the relief valve 72 is opened, so that the drainage device 35 (see FIG. 1). It becomes the sealed water in the sealed water part.

本実施形態によれば、以下の効果が奏される。
本実施形態の貯湯式温水器１１によれば、給湯用混合弁６２を介さずに、貯湯タンク６１の湯と、水とを混合して排水管４１に排出する混合部６９を設けた。これにより、給湯用混合弁６２を介さずに、貯湯タンク６１内の湯と水とを混合させて排出できる。そのため、給湯用混合弁６２の設定温度を例えば４０℃に下げた場合であっても、混合部６９における排水の設定温度を例えばより高い５０℃とすることで、貯湯タンク６１内の湯を入れ替える際の排水量が増加するのを防止できる。ひいては節水することができ、ランニングコストを低減できる。 According to this embodiment, the following effects are produced.
According to the hot water storage type water heater 11 of the present embodiment, the mixing unit 69 that mixes the hot water in the hot water storage tank 61 and water and discharges it to the drain pipe 41 without using the hot water mixing valve 62 is provided. Accordingly, the hot water and water in the hot water storage tank 61 can be mixed and discharged without going through the hot water supply mixing valve 62. Therefore, even when the set temperature of the hot water supply mixing valve 62 is lowered to, for example, 40 ° C., the hot water in the hot water storage tank 61 is replaced by setting the set temperature of the waste water in the mixing unit 69 to, for example, 50 ° C. It is possible to prevent the amount of waste water from increasing. As a result, water can be saved, and running costs can be reduced.

また、混合部６９を、流入する湯と水とを一定比率で混合可能に構成するとともに、混合部６９の流出側に、開閉可能な電磁弁７０を設けた。これにより、電磁弁７０を開閉することによって、給湯用混合弁６２の設定温度によらずに、排水量を抑えながら貯湯タンク６１内の湯を入れ替えできる。   In addition, the mixing unit 69 is configured to be able to mix inflowing hot water and water at a constant ratio, and an electromagnetic valve 70 that can be opened and closed is provided on the outflow side of the mixing unit 69. Thus, by opening and closing the electromagnetic valve 70, the hot water in the hot water storage tank 61 can be replaced while suppressing the amount of drainage regardless of the set temperature of the hot water supply mixing valve 62.

また、混合部６９の水流入側（給水分岐管９２側）と湯流入側（熱湯分岐管９１側）に、それぞれ逆止弁６７，６８を設けた。これにより、混合部６９からの混合水の逆流を確実に防止することができる。   In addition, check valves 67 and 68 are provided on the water inflow side (water supply branch pipe 92 side) and the hot water inflow side (hot water branch pipe 91 side) of the mixing unit 69, respectively. Thereby, the backflow of the mixed water from the mixing part 69 can be prevented reliably.

＜第２実施形態＞
次に、本発明の第２実施形態に係る貯湯式温水器１０１について説明する。図３は、第２実施形態に係る貯湯式温水器１０１の内部構成を示す図である。なお、本実施形態の貯湯式温水器１０１において、上記第１実施形態の貯湯式温水器１１と同様の構成については同一の符号を付し、重複する説明は省略する。また、本実施形態の貯湯式温水器１０１の外観は、図１と同様である。 Second Embodiment
Next, the hot water storage water heater 101 according to the second embodiment of the present invention will be described. FIG. 3 is a diagram illustrating an internal configuration of the hot water storage water heater 101 according to the second embodiment. In addition, in the hot water storage water heater 101 of this embodiment, the same code | symbol is attached | subjected about the structure similar to the hot water storage water heater 11 of the said 1st Embodiment, and the overlapping description is abbreviate | omitted. Moreover, the external appearance of the hot water storage type water heater 101 of this embodiment is the same as that of FIG.

本実施形態の貯湯式温水器１０１は、上記第１実施形態の混合部６９に代えて、排水温度調整用の排出用混合弁１０２を備える。この排出用混合弁１０２は、湯流入側の流路の開度と、水流入側の流路の開度と調整することで、流入する湯と水との混合比率を変更可能となっている。即ち、排出用混合弁１０２では、混合する湯と水の割合を調整して、排水する混合水の温度を調整することが可能となっている。   The hot water storage type water heater 101 of the present embodiment includes a discharge mixing valve 102 for adjusting the temperature of the drainage, instead of the mixing unit 69 of the first embodiment. This mixing valve 102 for discharge can change the mixing ratio of the flowing hot water and water by adjusting the opening degree of the flow path on the hot water inflow side and the opening degree of the flow path on the water inflow side. . In other words, the discharge mixing valve 102 can adjust the temperature of the mixed water to be drained by adjusting the ratio of hot water and water to be mixed.

熱湯分岐管９１と給水分岐管９２は、混合部としての排出用混合弁１０２において合流している。電磁弁７０は、排出用混合弁１０２の流出側に設けられている。これにより、本実施形態の貯湯式温水器１０１は、給湯用混合弁６２を介さずに、排出用混合弁１０２により貯湯タンク６１の湯と水とを混合し、排水管４１に排出できるようになっている。   The hot water branch pipe 91 and the feed water branch pipe 92 merge at a discharge mixing valve 102 as a mixing section. The electromagnetic valve 70 is provided on the outflow side of the discharge mixing valve 102. As a result, the hot water storage water heater 101 of this embodiment can mix the hot water and water in the hot water storage tank 61 by the discharge mixing valve 102 without using the hot water supply mixing valve 62, and discharge the mixed water to the drain pipe 41. It has become.

本実施形態の貯湯式温水器１０１は、基本的には上記第１実施形態の貯湯式温水器１１と同様に動作する。また、本実施形態によれば、上記第１実施形態の効果に加えて以下の効果が奏される。
本実施形態の貯湯式温水器１０１によれば、混合部に、流入する湯と水との混合比率を変更可能な排出用混合弁１０２を設けるとともに、混合部の流出側に、開閉可能な電磁弁７０を設けた。これにより、電磁弁７０を開閉することによって、給湯用混合弁６２の設定温度によらずに、排水量を抑えながら貯湯タンク６１内の湯を入れ替えできる。また、混合部に設けた排出用混合弁１０２により、湯と水との混合比率を変更することで、排水温度の調整が可能である。 The hot water storage water heater 101 of the present embodiment basically operates in the same manner as the hot water storage water heater 11 of the first embodiment. Moreover, according to this embodiment, the following effects are produced in addition to the effects of the first embodiment.
According to the hot water storage type water heater 101 of the present embodiment, the mixing part is provided with the discharge mixing valve 102 capable of changing the mixing ratio of hot water and water that flows in, and the electromagnetic that can be opened and closed on the outflow side of the mixing part. A valve 70 was provided. Thus, by opening and closing the electromagnetic valve 70, the hot water in the hot water storage tank 61 can be replaced while suppressing the amount of drainage regardless of the set temperature of the hot water supply mixing valve 62. Further, the drainage temperature can be adjusted by changing the mixing ratio of hot water and water by the discharge mixing valve 102 provided in the mixing section.

また、排出用混合弁１０２の水流入側（給水分岐管９２側）と湯流入側（熱湯分岐管９１側）に、それぞれ逆止弁６７，６８を設けた。これにより、混合部としての排出用混合弁１０２からの混合水の逆流を確実に防止することができる。   Further, check valves 67 and 68 are provided on the water inflow side (supply water branch pipe 92 side) and the hot water inflow side (hot water branch pipe 91 side) of the discharge mixing valve 102, respectively. Thereby, the backflow of the mixed water from the discharge mixing valve 102 as the mixing unit can be reliably prevented.

＜第３実施形態＞
次に、本発明の第３実施形態に係る貯湯式温水器２０１について説明する。図４は、第３実施形態に係る貯湯式温水器２０１の内部構成を示す図である。なお、本実施形態の貯湯式温水器２０１において、上記第１実施形態の貯湯式温水器１１と同様の構成については同一の符号を付し、重複する説明は省略する。また、本実施形態の貯湯式温水器２０１の外観は、図１と同様である。 <Third Embodiment>
Next, a hot water storage type water heater 201 according to a third embodiment of the present invention will be described. FIG. 4 is a diagram illustrating an internal configuration of the hot water storage type water heater 201 according to the third embodiment. In addition, in the hot water storage type water heater 201 of this embodiment, the same code | symbol is attached | subjected about the structure similar to the hot water storage type water heater 11 of the said 1st Embodiment, and the overlapping description is abbreviate | omitted. Moreover, the external appearance of the hot water storage type water heater 201 of this embodiment is the same as that of FIG.

本実施形態の貯湯式温水器２０１は、上記第１実施形態の逆止弁６７，６８に代えて、電磁弁２０２，２０３を備える。即ち、混合部６９の水流入側（給水分岐管９２側）と湯流入側（熱湯分岐管９１側）に、それぞれ電磁弁２０２，２０３が設けられている。排水時には、これら２つの電磁弁２０２，２０３が同時に開かれる。なお、この場合には、混合部６９の流出側には電磁弁が設けられていない。   A hot water storage type water heater 201 of the present embodiment includes electromagnetic valves 202 and 203 instead of the check valves 67 and 68 of the first embodiment. That is, solenoid valves 202 and 203 are provided on the water inflow side (water supply branch pipe 92 side) and the hot water inflow side (hot water branch pipe 91 side) of the mixing unit 69, respectively. At the time of draining, these two solenoid valves 202 and 203 are opened simultaneously. In this case, a solenoid valve is not provided on the outflow side of the mixing unit 69.

本実施形態の貯湯式温水器２０１は、基本的には上記第１実施形態の貯湯式温水器１１と同様に動作する。また、本実施形態によれば、上記第１実施形態の効果に加えて以下の効果が奏される。
本実施形態の貯湯式温水器２０１によれば、混合部６９を、流入する湯と水とを一定比率で混合可能に構成するとともに、上述の実施形態１の逆止弁に代えて、混合部６９の水流入側と湯流入側に、それぞれ開閉可能な電磁弁２０２，２０３を設けた。これにより、固着等による詰りが比較的生じ易い逆止弁に比べて耐久性の高い電磁弁２０２，２０３を用いることで、より耐久性が高く信頼性の高い貯湯式温水器２０１が得られる。 The hot water storage water heater 201 of the present embodiment basically operates in the same manner as the hot water storage water heater 11 of the first embodiment. Moreover, according to this embodiment, the following effects are produced in addition to the effects of the first embodiment.
According to the hot water storage type water heater 201 of the present embodiment, the mixing unit 69 is configured to be able to mix inflowing hot water and water at a constant ratio, and instead of the check valve of the first embodiment, the mixing unit 69 Electromagnetic valves 202 and 203 that can be opened and closed are provided on the water inflow side and the hot water inflow side of 69, respectively. As a result, by using the solenoid valves 202 and 203 having higher durability compared to the check valves that are more likely to be clogged due to sticking or the like, the hot water storage water heater 201 having higher durability and reliability can be obtained.

１１…貯湯式温水器
４１…排水管
６１…貯湯タンク
６２…給湯用混合弁
６７，６８…逆止弁
６９…混合部
７０…電磁弁（開閉弁）
１２０…排水用混合弁
２０２，２０３…電磁弁（開閉弁） DESCRIPTION OF SYMBOLS 11 ... Hot water storage water heater 41 ... Drain pipe 61 ... Hot water storage tank 62 ... Hot water mixing valve 67, 68 ... Check valve 69 ... Mixing part 70 ... Solenoid valve (open / close valve)
120 ... Mixing valve for drainage 202, 203 ... Solenoid valve (open / close valve)

Claims (5)

湯を貯湯する貯湯タンクと、
前記貯湯タンク内の湯と、水とを混合して給湯するための給湯用混合弁と、を備える貯湯式温水器において、
前記給湯用混合弁を介さずに、前記貯湯タンク内の湯と、水とを混合して排水管に排出する混合部を備え、
前記貯湯タンク内に水を供給する給水管を備え、前記貯湯タンク内の湯を入れ替えするために排水する際は、前記給水管とは別経路で貯湯タンク内の湯が前記貯湯タンク内の上部から排出され、
前記給水管から一部の給水が分流された水が前記混合部で混合される貯湯式温水器。 A hot water storage tank for storing hot water,
In a hot water storage water heater comprising a hot water in the hot water storage tank and a hot water mixing valve for mixing and supplying hot water,
Without using the mixing valve for hot water supply, comprising a mixing section for mixing the hot water in the hot water storage tank with water and discharging it to the drain pipe,
The hot water storage tank is provided with a water supply pipe for supplying water, and when draining to replace the hot water in the hot water storage tank, the hot water in the hot water storage tank is separated from the water supply pipe by an upper path in the hot water storage tank. It is discharged from,
Hot water storage type water heater the water part of the water is diverted from the water supply pipe Ru are mixed in the mixing section. 前記混合部は、流入する湯と水とを一定比率で混合可能であり、
前記混合部の流出側には、開閉可能な開閉弁が設けられている請求項１に記載の貯湯式温水器。 The mixing unit is capable of mixing inflowing hot water and water at a constant ratio,
The hot water storage water heater according to claim 1, wherein an openable / closable valve is provided on the outflow side of the mixing unit. 前記混合部は、流入する湯と水との混合比率を変更可能な排出用混合弁を備え、
前記混合部の流出側には、開閉可能な開閉弁が設けられている請求項１に記載の貯湯式温水器。 The mixing unit includes a discharge mixing valve capable of changing a mixing ratio of flowing hot water and water,
The hot water storage water heater according to claim 1, wherein an openable / closable valve is provided on the outflow side of the mixing unit. 前記混合部の湯流入側と水流入側には、それぞれ逆止弁が設けられている請求項１から３いずれかに記載の貯湯式温水器。   The hot water storage type water heater according to any one of claims 1 to 3, wherein a check valve is provided on each of the hot water inflow side and the water inflow side of the mixing unit. 前記混合部は、流入する湯と水とを一定比率で混合可能であり、
前記混合部の湯流入側と水流入側には、それぞれ開閉可能な開閉弁が設けられている請求項１に記載の貯湯式温水器。 The mixing unit is capable of mixing inflowing hot water and water at a constant ratio,
The hot water storage type water heater according to claim 1, wherein on-off valves that can be opened and closed are respectively provided on the hot water inflow side and the water inflow side of the mixing unit.
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