JP2006084159A

JP2006084159A - Electric water heater

Info

Publication number: JP2006084159A
Application number: JP2004271656A
Authority: JP
Inventors: Takeshi Sanroumaru; 彪三▲ろう▼丸
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-09-17
Filing date: 2004-09-17
Publication date: 2006-03-30

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric water heater allowing miniaturization, without having fear of a hot water shortage, and superior in heat efficiency. <P>SOLUTION: A hot water storage tank inside water supply pipe 4 communicating with a water supply port 3 is spirally arranged in a hot water storage tank 2. This electric water heater 1 is provided by arranging a heating heater 5 in the hot water storage tank inside water supply pipe 4. Further, the hot water storage tank inside water supply pipe 4 is spirally arranged on a substantially vertical surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、小型化が可能であると共に、湯切れの心配がなく、且つ、熱効率の良い貯湯式の電気給湯器に関するものである。 The present invention relates to a hot water storage type electric water heater that can be reduced in size, is free from the danger of running out of hot water, and has high thermal efficiency.

従来の此種給湯器として、灯油やガスを加熱源とした給湯器や、電気を加熱源とした給湯器が知られている。
そして、電気を加熱源とした電気給湯器が排ガス、臭い、音等を発生しないことや、利便性が高いことから広く普及しており、特に、電気給湯器として、安価な深夜電力を利用した電気温水器が一般に普及している。 As this kind of conventional water heater, a water heater using kerosene or gas as a heating source and a water heater using electricity as a heating source are known.
Electric water heaters that use electricity as a heat source are widely used because they do not generate exhaust gas, odors, sounds, etc., and are highly convenient. In particular, they used inexpensive late-night power as electric water heaters. Electric water heaters are popular.

この深夜電力を利用した電気温水器は比較的大型の貯湯槽内の下部に発熱体が配置され、深夜電力料金を利用できる所定の深夜の時間帯に発熱体が通電され加熱されて湯を沸かすものであり、貯湯槽の上部から湯を給湯し、給湯した湯の量と同量の水が貯湯槽の下部から供給されるように構成されており、同様の電気温水器が特許文献１にも記載されている。
特開２００３−１４８８１１号公報 This electric water heater using midnight power has a heating element placed in the lower part of a relatively large hot water tank, and the heating element is energized and heated to boil hot water during a predetermined midnight time period when midnight power charges can be used. The hot water is supplied from the upper part of the hot water tank, and the same amount of hot water is supplied from the lower part of the hot water tank. A similar electric water heater is disclosed in Patent Document 1. Is also described.
JP 2003-148811 A

前述した深夜電力を利用した電気温水器は、利便性も高く一般に普及しているが、深夜電力を利用するため、貯湯容量を確保すべく貯湯槽を比較的大型に形成する必要があり、従って、重量があり、持ち運びが困難で、更に、工費がかかり、設置場所が限定されるという問題があった。又、貯湯容量が制限されるため、湯切れの心配があった。 Electric water heaters using midnight power as described above are highly convenient and generally popular, but in order to use midnight power, it is necessary to form a hot water tank relatively large in order to secure hot water storage capacity. In addition, there is a problem in that it is heavy, difficult to carry, further costs for construction, and the installation location is limited. Moreover, since the hot water storage capacity was limited, there was a concern about running out of hot water.

以上の現状に鑑み、本発明は、小型化が可能であると共に、湯切れの心配がなく、且つ、熱効率の良い電気給湯器を提供することを目的とする。 In view of the above situation, an object of the present invention is to provide an electric water heater that can be reduced in size, has no fear of running out of hot water, and has high thermal efficiency.

上記の課題を解決すべく、本発明は以下の構成を提供する。
請求項１に係る発明は、貯湯槽内に給水口と連通する貯湯槽内給水管を渦巻き状に配設すると共に、該貯湯槽内給水管内に発熱ヒータを配設したことを特徴とする電気給湯器を提供するものである。 In order to solve the above problems, the present invention provides the following configurations.
The invention according to claim 1 is characterized in that the hot water tank internal water supply pipe communicating with the water supply port is spirally arranged in the hot water storage tank, and a heater is provided in the hot water tank internal water supply pipe. A water heater is provided.

請求項２に係る発明は、上記貯湯槽内給水管は略鉛直面上に渦巻き状に配設されていることを特徴とする請求項１記載の電気給湯器を提供するものである。
請求項３に係る発明は、上記貯湯槽内給水管は略水平面上に渦巻き状に配設されていることを特徴とする請求項１記載の電気給湯器を提供するものである。 The invention according to claim 2 provides the electric water heater according to claim 1, characterized in that the hot water storage tank water supply pipe is spirally arranged on a substantially vertical surface.
The invention according to claim 3 provides the electric water heater according to claim 1, characterized in that the hot water storage tank water supply pipe is spirally arranged on a substantially horizontal plane.

請求項４に係る発明は、上記貯湯槽内給水管の先端は貯湯槽内の下部位置に開口していることを特徴とする請求項１，２又は３記載の電気給湯器を提供するものである。 The invention according to claim 4 provides the electric water heater according to claim 1, 2 or 3, wherein a tip of the water supply pipe in the hot water tank is opened at a lower position in the hot water tank. is there.

請求項５に係る発明は、上記貯湯槽内給水管は直径１５ｍｍ〜２５ｍｍの銅パイプで形成されていることを特徴とする請求項１，２，３又は４記載の電気給湯器を提供するものである。 The invention according to claim 5 provides the electric water heater according to claim 1, 2, 3 or 4, wherein the water supply pipe in the hot water tank is formed of a copper pipe having a diameter of 15 to 25 mm. It is.

請求項６に係る発明は、上記発熱ヒータは２５ｍ〜３５ｍの長さに形成されていることを特徴とする請求項１，２，３，４又は５記載の電気給湯器を提供するものである。 The invention according to claim 6 provides the electric water heater according to claim 1, 2, 3, 4 or 5, wherein the heating heater is formed in a length of 25 m to 35 m. .

請求項７に係る発明は、上記貯湯槽の側部に風呂に湯を循環させるための風呂循環注ぎ口及び風呂循環戻り口が開穿されていることを特徴とする請求項１，２，３，４，５又は６記載の電気給湯器を提供するものである。 The invention according to claim 7 is characterized in that a bath circulation pouring spout and a bath circulation return port for circulating hot water in the bath are opened at the side of the hot water tank. , 4, 5 or 6 is provided.

本発明の請求項１記載の発明によれば、貯湯槽内に給水口と連通する貯湯槽内給水管を渦巻き状に配設すると共に、該貯湯槽内給水管内に発熱ヒータを配設した電気給湯器を提供するので、深夜電力を利用することに制限されることなく、いつでも加熱が可能であり、従って、大きな貯湯槽を必要とせず小型化が可能であると共に、湯切れの心配がなく、且つ、貯湯槽内給水管内に発熱ヒータが配設されているので熱効率の良い電気給湯器を提供できる。 According to the first aspect of the present invention, the hot water tank water supply pipe communicating with the water supply port is spirally arranged in the hot water tank, and the heating heater is disposed in the hot water tank water supply pipe. Since the hot water heater is provided, it can be heated at any time without being restricted to using late-night power, so it can be downsized without requiring a large hot water tank, and there is no worry of running out of hot water. And since the heat generating heater is arrange | positioned in the hot water storage tank water supply pipe, an electric water heater with high thermal efficiency can be provided.

請求項２記載の発明によれば、上記貯湯槽内給水管は略鉛直面上に渦巻き状に配設されているので、請求項１記載の発明の効果に加え、貯湯槽の高さを高くすることができ、湯の対流を促進することができると共に、貯湯槽内の上部位置に滞留する高温湯と下部位置に滞留する低温湯との混合を防ぎ、常に高温湯を給湯することができる。 According to the invention described in claim 2, since the water supply pipe in the hot water tank is arranged in a spiral shape on a substantially vertical surface, in addition to the effect of the invention of claim 1, the height of the hot water tank is increased. The hot water convection can be promoted, the hot water staying at the upper position in the hot water tank and the low temperature hot water staying at the lower position can be prevented from being mixed, and hot water can be always supplied. .

請求項３記載の発明によれば、上記貯湯槽内給水管は略水平面上に渦巻き状に配設されているので、請求項１記載の発明の効果に加え、貯湯槽の高さを低くすることができ、電気給湯器を高さの狭いスペースに収納することができる。 According to invention of Claim 3, since the said hot water tank water supply pipe is arrange | positioned spirally on the substantially horizontal surface, in addition to the effect of invention of Claim 1, the height of a hot water tank is made low. The electric water heater can be stored in a narrow space.

請求項４記載の発明によれば、上記貯湯槽内給水管の先端は貯湯槽内の下部位置に開口しているので、請求項１，２又は３記載の発明の効果に加え、貯湯槽内給水管の先端から供給される低温湯が貯湯槽内の上部に滞留する高温湯に混合することを防止することができる。 According to invention of Claim 4, since the front-end | tip of the said hot water tank water supply pipe is opening in the lower position in a hot water tank, in addition to the effect of the invention of Claim 1, 2, or 3, in a hot water tank It is possible to prevent the low temperature hot water supplied from the tip of the water supply pipe from being mixed with the high temperature hot water staying in the upper part of the hot water storage tank.

請求項５記載の発明によれば、上記貯湯槽内給水管は直径１５ｍｍ〜２５ｍｍの銅パイプで形成されているので、請求項１，２，３又は４記載の発明の効果に加え、熱伝導率が良く、加熱効率を高めることができる。 According to the invention described in claim 5, since the water supply pipe in the hot water tank is formed of a copper pipe having a diameter of 15 to 25 mm, in addition to the effect of the invention described in claim 1, 2, 3 or 4, heat conduction The rate is good and the heating efficiency can be increased.

請求項６記載の発明によれば、上記発熱ヒータは２５ｍ〜３５ｍの長さに形成されているので、請求項１，２，３，４又は５記載の発明の効果に加え、貯湯層内の水又は湯を広範囲に加熱し、加熱効率を高めることができる。 According to invention of Claim 6, since the said heater is formed in the length of 25m-35m, in addition to the effect of the invention of Claim 1, 2, 3, 4 or 5, in the hot water storage layer Water or hot water can be heated over a wide range to increase the heating efficiency.

請求項７記載の発明によれば、上記貯湯槽の側部に風呂に湯を循環させるための風呂循環注ぎ口及び風呂循環戻り口が開穿されているので、請求項１，２，３，４，５又は６記載の発明の効果に加え、風呂の湯を循環させて、風呂の湯温を一定に保持することができると共に、追い炊きをすることができる。 According to the invention of claim 7, since the bath circulation pouring spout and the bath circulation return port for circulating hot water in the bath are opened in the side part of the hot water tank, In addition to the effects of the invention described in 4, 5 or 6, the bath water can be circulated to keep the bath temperature constant, and it is possible to perform additional cooking.

以下、実施例を示した図面を参照しつつ本発明の実施の形態を説明する。
図１に於いて、１は本発明の電気給湯器を示し、電気給湯器１は、奥行きｄ１寸法よりも高さｈ１寸法が大きい略立方体のステンレス容器から成る貯湯槽２内に給水口３と連通する貯湯槽内給水管４を渦巻き状に配設すると共に、該貯湯槽内給水管４内に発熱ヒータ５を配設している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings showing examples.
In FIG. 1, reference numeral 1 denotes an electric water heater of the present invention. The electric water heater 1 includes a water supply port 3 in a hot water tank 2 made of a substantially cubic stainless steel container having a height h1 larger than a depth d1. The hot water tank water supply pipe 4 that communicates is arranged in a spiral shape, and the heater 5 is provided in the hot water tank water supply pipe 4.

そして、貯湯槽内給水管４は直径１５ｍｍ〜２５ｍｍ、好ましくは、直径２０ｍｍの銅パイプで形成され、略鉛直面上に渦巻き状に先端側が中心に向かうように配設されており、且つ、貯湯槽内給水管４の先端部４ａは貯湯槽２内の下部に向かって延びており、貯湯槽内給水管４の先端４ｂが貯湯槽２内の下部位置に開口している。 The hot water storage tank water supply pipe 4 is formed of a copper pipe having a diameter of 15 mm to 25 mm, preferably 20 mm, and is disposed on a substantially vertical surface in a spiral shape so that the tip side is directed toward the center. The front end 4 a of the water supply pipe 4 in the tank extends toward the lower part in the hot water tank 2, and the front end 4 b of the water supply pipe 4 in the hot water tank opens at a lower position in the hot water tank 2.

一方、貯湯槽内給水管４の他端側は、給水口３を介して貯湯槽外給水管６に接続され、貯湯槽外給水管６は水道（図示せず）に接続されている。
又、貯湯槽２内の渦巻き状の貯湯槽内給水管４内には、前述したように、発熱ヒータ５が配設され、発熱ヒータ５は２５ｍ〜３５ｍ、好ましくは、３０ｍの長さの自己制御カーボン発熱ヒータであり、貯湯槽内給水管４内の給水口３近傍から、貯湯槽内給水管４内の先端部４ａ近傍まで貯湯槽内給水管４の略全長に及んで配設されている。 On the other hand, the other end side of the hot water tank internal water supply pipe 4 is connected to the hot water tank external water supply pipe 6 via the water supply port 3, and the hot water tank external water supply pipe 6 is connected to a water supply (not shown).
Further, as described above, the heating heater 5 is disposed in the spiral hot water storage water supply pipe 4 in the hot water storage tank 2, and the heating heater 5 has a length of 25 to 35 m, preferably 30 m. This is a controlled carbon heater, and is disposed over the substantially entire length of the hot water tank water supply pipe 4 from the vicinity of the water supply port 3 in the hot water tank water supply pipe 4 to the vicinity of the tip 4a in the hot water tank water supply pipe 4. Yes.

更に、貯湯槽２内の給水口３近傍に給湯口９が開穿され、給湯口９に貯湯槽内給湯管１０が連通して設けられ、貯湯槽内給湯管１０は貯湯槽２内の略左右中心部まで延設され、貯湯槽内給湯管１０の先端は貯湯槽２内の略上下中心部で開口している。一方、貯湯槽内給湯管１０は、給湯口９を介して貯湯槽外給湯管１１に接続され、貯湯槽外給水管１１は図示しない風呂、台所、洗面所等に設置される給湯栓に連結されている。 Further, a hot water supply port 9 is opened in the vicinity of the water supply port 3 in the hot water storage tank 2, a hot water supply pipe 10 in the hot water storage tank is connected to the hot water supply port 9, and the hot water supply pipe 10 in the hot water storage tank is an abbreviation in the hot water storage tank 2. The hot water tank internal hot water pipe 10 is extended to the center in the left and right direction, and the tip of the hot water tank 10 is opened at a substantially vertical center in the hot water tank 2. On the other hand, the hot water supply pipe 10 in the hot water tank is connected to a hot water supply pipe 11 outside the hot water tank through a hot water outlet 9, and the hot water supply pipe 11 outside the hot water tank is connected to a hot water tap installed in a bath, kitchen, washroom, etc. (not shown). Has been.

更に又、貯湯槽２の一側部に風呂（図示せず）に湯を循環させるための風呂循環注ぎ口７及び風呂循環戻り口８が開穿されており、風呂循環注ぎ口７及び風呂循環戻り口８は風呂に湯を循環させるための配管１２，１３に夫々接続されている。 Furthermore, a bath circulation spout 7 and a bath circulation return port 8 for circulating hot water to a bath (not shown) are opened at one side of the hot water tank 2, and the bath circulation pour 7 and the bath circulation are opened. The return port 8 is connected to pipes 12 and 13 for circulating hot water in the bath, respectively.

尚、図に於いて、１４は水抜き栓であり、貯湯槽２内の湯又は水を排出するために使用する。
而して、前記電気給湯器１の使用及び利用方法について説明する。 In the figure, reference numeral 14 denotes a drain plug, which is used for discharging hot water or water in the hot water tank 2.
Thus, how to use and use the electric water heater 1 will be described.

電気給湯器１の水抜き栓１４を閉め、貯湯槽外給水管６の給水栓（図示せず）を開放し、貯湯槽外給湯管１１に連結される給湯栓の一部を開放すると、貯湯槽外給水管６から水道水圧で水が給水され、給水された水は渦巻き状の貯湯槽内給水管４内を循環して、貯湯槽内給水管４の先端４ｂから貯湯槽２内に排出され、貯湯槽２内に貯留する。 When the drain plug 14 of the electric water heater 1 is closed, the water tap (not shown) of the hot water tank external water supply pipe 6 is opened, and a part of the hot water tap connected to the hot water tank external hot water pipe 11 is opened, Water is supplied from the outside water supply pipe 6 with tap water pressure, and the supplied water circulates in the spiral hot water tank water supply pipe 4 and is discharged from the tip 4b of the hot water tank water supply pipe 4 into the hot water tank 2. And stored in the hot water tank 2.

そして、貯湯槽外給湯管１１に連結される給湯栓から水が出始めたら、給湯栓を閉め、発熱ヒータ５を導通させると、発熱ヒータ５は発熱し、貯湯槽内給水管４内の水を加熱すると共に、貯湯槽２内の水を加熱する。 When water begins to come out from the hot water tap connected to the hot water supply pipe 11 outside the hot water tank, the hot water heater 5 is heated when the hot water tap is closed and the heater 5 is turned on, and the water in the hot water tank 4 And the water in the hot water tank 2 are heated.

この時、貯湯槽２内の水は加熱されることにより対流し、貯湯槽２内の上部に高温湯が滞留し、貯湯槽２内の下部に低温湯が滞留する。
そして、貯湯槽２内の水が所定温度に達した時、発熱ヒータ５の自己制御によって、発熱ヒータ５の導通が遮断され、発熱ヒータ５による加熱が停止する。この状態で、貯湯槽外給湯管１１に連結される給湯栓を開くと、給湯栓から貯湯槽外給湯管１１内の水が排出された後に貯湯槽２内の高温湯が給湯される。 At this time, the water in the hot water tank 2 is convected by being heated, and high temperature hot water stays in the upper part of the hot water tank 2, and low temperature hot water stays in the lower part of the hot water tank 2.
And when the water in the hot water storage tank 2 reaches a predetermined temperature, the conduction of the heating heater 5 is cut off by the self-control of the heating heater 5, and the heating by the heating heater 5 is stopped. In this state, when the hot water tap connected to the hot water storage tank outside hot water supply pipe 11 is opened, the hot water in the hot water storage tank 2 is supplied with hot water after the water in the hot water storage tank external hot water supply pipe 11 is discharged from the hot water tap.

この時、給湯栓から排出された水及び給湯された高温湯に相当する量の水が貯湯槽内給水管４から貯湯槽２内に給水され、給水によって貯湯槽２内の湯温が下がると発熱ヒータ５の自己制御により発熱ヒータ５が導通され、発熱ヒータ５の加熱が再開する。 At this time, when water discharged from the hot water tap and water corresponding to the hot water supplied are supplied from the hot water supply pipe 4 into the hot water tank 2, and the hot water in the hot water tank 2 is lowered by the water supply. The heater 5 is turned on by self-control of the heater 5 and heating of the heater 5 is resumed.

前記貯湯槽内給水管２の先端４ｂから給水される水の水温は貯湯槽２内の湯温よりも低いが、貯湯槽内給水管４の先端４ｂが貯湯槽２内の下部位置に開口しているため、貯湯槽内給水管２の先端４ｂから給水される水が貯湯槽２内の上部に滞留する高温湯と混合することがなく、高温湯は高温を維持できる。 The temperature of the water supplied from the tip 4b of the hot water tank water supply pipe 2 is lower than the temperature of the hot water in the hot water tank 2, but the tip 4b of the hot water tank water pipe 4 opens at a lower position in the hot water tank 2. Therefore, the water supplied from the tip 4b of the hot water tank water supply pipe 2 is not mixed with the hot water staying in the upper part of the hot water tank 2, and the hot water can maintain a high temperature.

湯が使用されない場合に於いても、時間の経過によって貯湯槽２内の湯温は低下するが、その場合は、発熱ヒータ５の自己制御によって発熱ヒータ５が再加熱され、貯湯槽２内の湯温は略一定の温度に維持される。 Even when hot water is not used, the hot water temperature in the hot water tank 2 decreases with the passage of time. In that case, the heat generating heater 5 is reheated by self-control of the heat generating heater 5, and the hot water tank 2 is heated. The hot water temperature is maintained at a substantially constant temperature.

この状態で、風呂循環注ぎ口７から配管１２を介して風呂に湯を注ぎ、風呂で低温となった湯を配管１３を介して風呂循環戻り口８から貯湯槽２内に戻すことにより、風呂水を循環させ、風呂の湯の湯温の保持、或いは追い炊きをすることも可能である。この循環は図示しないポンプ等を利用して行われる。尚、風呂には前記貯湯槽外給湯管１１を介して給湯することも可能である。 In this state, hot water is poured into the bath from the bath circulation spout 7 via the pipe 12, and hot water that has become cold in the bath is returned from the bath circulation return port 8 to the hot water tank 2 via the pipe 13. It is also possible to circulate the water and maintain the hot water temperature of the bath water, or to cook again. This circulation is performed using a pump (not shown). In addition, it is also possible to supply hot water to the bath through the hot water storage pipe 11 outside the hot water tank.

斯くして、前記電気給湯器１は貯湯槽２内に給水口３と連通する貯湯槽内給水管４が渦巻き状に配設されると共に、該貯湯槽内給水管４内に発熱ヒータ５が配設されるので、深夜電力の利用に限定されることなく、いつでも加熱が可能であり、従って、大きな貯湯槽を必要とせず小型化が可能であると共に、貯湯量に制限されることがなく、必要な湯量を湯切れなく供給できる。そのため、小さなスペースに置くことができると共に、少量の湯量を必要とする場所に設置することが可能である。 Thus, in the electric water heater 1, the hot water tank water supply pipe 4 communicating with the water supply port 3 is disposed in the hot water tank 2 in a spiral shape, and the heater 5 is provided in the hot water tank water supply pipe 4. Because it is arranged, it is possible to heat at any time without being limited to the use of late-night power, and thus it is possible to reduce the size without requiring a large hot water storage tank and not to be limited by the amount of hot water stored. The necessary amount of hot water can be supplied without running out of hot water. Therefore, it can be placed in a small space and installed in a place that requires a small amount of hot water.

又、貯湯槽内給水管４内に発熱ヒータ５が配設されているので、温度の低い水を集中的に加熱することにより、吸熱効率が高くなり、熱効率が良い。
更に、前記電気給湯器１を小型に複数個形成し、適宜複数個所に設置することも可能であり、或いは、小型に複数個形成した電気給湯器１，１…を一箇所にまとめて大量の給湯を行うことも可能である。更に又、前記電気給湯器１は大型に形成することも可能である。尚、その場合に於いては、発熱ヒータ５の長さ、及び、貯湯槽内給水管４の銅パイプの大きさを前述の寸法から適宜変更することも可能である。 In addition, since the heater 5 is disposed in the hot water tank water supply pipe 4, the heat absorption efficiency is increased and the heat efficiency is improved by intensively heating water having a low temperature.
Further, it is possible to form a plurality of electric water heaters 1 in a small size and install them at a plurality of locations as appropriate, or to combine a plurality of small size electric water heaters 1, 1. It is also possible to supply hot water. Furthermore, the electric water heater 1 can be formed in a large size. In this case, the length of the heater 5 and the size of the copper pipe of the hot water tank water supply pipe 4 can be appropriately changed from the above dimensions.

従って、前記電気給湯器１は従来の深夜電力を利用した電気温水器と同様に、風呂、台所、洗面所等の給湯や、床暖房等の給湯に利用することが可能であると共に、それらに一括して給湯することも、個別に給湯することも可能である。 Therefore, the electric water heater 1 can be used for hot water such as baths, kitchens, and washrooms, and hot water such as floor heating as well as conventional electric water heaters that use midnight power. Hot water can be supplied all at once or individually.

更に又、前記電気給湯器１は電気加熱方式であるため、灯油や、ガスを使った給湯器のような臭い、音、排ガスの発生がない。
そして、貯湯槽内給水管４は略鉛直面上に渦巻き状に配設されているので、貯湯槽２の高さを高くすることができ、湯の対流を促進することができると共に、貯湯槽２内の上部位置に滞留する高温湯と下部位置に滞留する低温湯との混合を防ぎ、常に高温湯を給湯することができる。又、幅の狭いスペースに置くことができる。 Furthermore, since the electric water heater 1 is an electric heating system, there is no generation of odor, sound and exhaust gas as in a hot water heater using kerosene or gas.
And since the hot water storage tank water supply pipe 4 is spirally arranged on a substantially vertical surface, the height of the hot water storage tank 2 can be increased, hot water convection can be promoted, and the hot water storage tank The hot water staying at the upper position in 2 and the low-temperature hot water staying at the lower position can be prevented from mixing, and hot water can be always supplied. Further, it can be placed in a narrow space.

更に、前記貯湯槽内給水管４の先端は貯湯槽２内の下部位置に開口しているので、貯湯槽内給水管４の先端から供給される低温湯が貯湯槽２内の上部に滞留する高温湯に混合することを防止することができる。 Furthermore, since the tip of the hot water tank water supply pipe 4 is open at a lower position in the hot water tank 2, the low temperature hot water supplied from the tip of the hot water tank water pipe 4 stays in the upper part of the hot water tank 2. Mixing with hot water can be prevented.

更に又、前記貯湯槽内給水管４は直径１５ｍｍ〜２５ｍｍ、好ましくは、直径２０ｍｍの銅パイプで形成されているので、熱伝導率が良く、加熱効率を高めることができる。 Furthermore, since the hot water storage tank water supply pipe 4 is formed of a copper pipe having a diameter of 15 mm to 25 mm, preferably 20 mm, the heat conductivity is good and the heating efficiency can be increased.

そして、前記発熱ヒータ５は２５ｍ〜３５ｍ、好ましくは３０ｍの長さに形成されているので、貯湯層２内の水又は湯を広範囲に加熱し、加熱効率を高めることができる。 And since the said heater 5 is formed in the length of 25m-35m, Preferably it is 30m, the water in the hot water storage layer 2 or hot water can be heated widely, and heating efficiency can be improved.

又、前記貯湯槽２の側部に風呂に湯を循環させるための風呂循環注ぎ口７及び風呂循環戻り口８が開穿されているので、風呂の湯を循環させて、風呂の湯温を一定に保持することができると共に、風呂の追い炊きにも利用することができる。 In addition, a bath circulation spout 7 and a bath circulation return port 8 for circulating hot water into the bath are opened at the side of the hot water tank 2, so that the hot water of the bath can be circulated by circulating the hot water of the bath. It can be kept constant and can also be used for bathing.

図２に於いて、２１は本発明の他の電気給湯器を示し、電気給湯器２１は、奥行きｄ２寸法よりも高さｈ２寸法が小さい略立方体のステンレス容器から成る貯湯槽２２内に給水口２３と連通する貯湯槽内給水管２４を渦巻き状に配設すると共に、該貯湯槽内給水管２４内に発熱ヒータ２５を配設している。 In FIG. 2, reference numeral 21 denotes another electric water heater of the present invention. The electric water heater 21 has a water inlet in a hot water tank 22 made of a substantially cubic stainless steel container having a height h2 smaller than the depth d2. A hot water tank water supply pipe 24 communicating with the hot water tank 23 is arranged in a spiral shape, and a heater 25 is provided in the hot water tank water supply pipe 24.

そして、貯湯槽内給水管２４は直径１５ｍｍ〜２５ｍｍ、好ましくは、直径２０ｍｍの銅パイプで形成され、略水平面上に渦巻き状に先端側が中心に向かうように配設されており、貯湯槽内給水管２４の先端２４ｂが貯湯槽２２内の下部位置に開口している。一方、貯湯槽内給水管２４は、給水口２３を介して貯湯槽外給水管２６に接続され、貯湯槽外給水管２６は水道（図示せず）に接続されている。 The hot water storage tank water supply pipe 24 is formed of a copper pipe having a diameter of 15 mm to 25 mm, preferably 20 mm, and is disposed on a substantially horizontal plane in a spiral shape so that the tip side is directed toward the center. A tip 24 b of the pipe 24 opens at a lower position in the hot water tank 22. On the other hand, the hot water tank internal water supply pipe 24 is connected to a hot water tank external water supply pipe 26 via a water supply port 23, and the hot water tank external water supply pipe 26 is connected to a water supply (not shown).

又、貯湯槽２２内の渦巻き状の貯湯槽内給水管２４内には、前述したように、発熱ヒータ２５が配設され、発熱ヒータ２５は２５ｍ〜３５ｍ、好ましくは、３０ｍの長さの自己制御カーボン発熱ヒータであり、貯湯槽内給水管２４内の給水口２３近傍から、貯湯槽内給水管２４内の先端部２４ａ近傍まで貯湯槽内給水管２４の略全長に及んで配設されている。 Further, as described above, the heating heater 25 is disposed in the spiral hot water storage pipe 24 in the hot water storage tank 22, and the heating heater 25 has a length of 25 m to 35 m, preferably 30 m. This is a controlled carbon heater, and is disposed over the substantially entire length of the hot water tank water supply pipe 24 from the vicinity of the water supply port 23 in the hot water tank water supply pipe 24 to the vicinity of the tip 24a in the hot water tank water supply pipe 24. Yes.

更に、貯湯槽２２内の給水口２３近傍に給湯口２９が開穿され、給湯口２９に貯湯槽内給湯管３０が連通して設けられ、貯湯槽内給湯管３０は貯湯槽２２内の略中心部まで延設され、貯湯槽内給湯管３０の先端は貯湯槽２２内の上部位置に開口している。一方、貯湯槽内給湯管３０の他端側は、給湯口２９を介して貯湯槽外給湯管３１に接続され、貯湯槽外給水管３１は図示しない風呂、台所、洗面所等に設置される給湯栓に連結されている。 Further, a hot water supply port 29 is opened near the water supply port 23 in the hot water storage tank 22, and a hot water supply pipe 30 in the hot water storage tank is communicated with the hot water supply port 29, and the hot water supply pipe 30 in the hot water storage tank is an abbreviation in the hot water storage tank 22. It extends to the center, and the tip of the hot water supply pipe 30 in the hot water tank opens to an upper position in the hot water tank 22. On the other hand, the other end of the hot water supply pipe 30 in the hot water tank is connected to a hot water supply pipe 31 outside the hot water tank through a hot water outlet 29, and the hot water supply pipe 31 outside the hot water tank is installed in a bath, kitchen, washroom, etc. (not shown). Connected to a hot water tap.

更に又、貯湯槽２２の一側部に風呂に湯を循環させるための風呂循環注ぎ口２７及び風呂循環戻り口２８が開穿されており、風呂循環注ぎ口２７及び風呂循環戻り口２８は風呂に湯を循環させるための配管３２，３３に夫々接続されている。 Furthermore, a bath circulation spout 27 and a bath circulation return port 28 for circulating hot water into the bath are opened at one side of the hot water tank 22, and the bath circulation pour 27 and the bath circulation return port 28 are baths. Are connected to pipes 32 and 33 for circulating hot water respectively.

尚、図に於いて、３４は水抜き栓であり、貯湯槽２２内の湯又は水を排出するために使用する。
而して、前記電気給湯器２１の使用及び利用方法について説明する。 In the figure, reference numeral 34 denotes a drain plug, which is used for discharging hot water or water in the hot water storage tank 22.
Thus, how to use and use the electric water heater 21 will be described.

電気給湯器２１の水抜き栓３４を閉め、貯湯槽外給水管２６の給水栓（図示せず）を開放し、貯湯槽外給湯管３１に連結される給湯栓の一部を開放すると、貯湯槽外給水管２６から水道水圧で水が給水され、給水された水は渦巻き状の貯湯槽内給水管２４内を循環して、貯湯槽内給水管２４の先端２４ｂから貯湯槽２２内に排出され、貯湯槽２２内に貯留する。 When the drain plug 34 of the electric water heater 21 is closed, the water tap (not shown) of the hot water tank external water supply pipe 26 is opened, and a part of the hot water tap connected to the hot water tank external hot water pipe 31 is opened, Water is supplied from the outside water supply pipe 26 with tap water pressure, and the supplied water circulates in the spiral hot water tank water supply pipe 24 and is discharged into the hot water tank 22 from the tip 24b of the hot water tank water supply pipe 24. And stored in the hot water tank 22.

そして、貯湯槽外給湯管３１に連結される給湯栓から水が出始めたら、給湯栓を閉め、発熱ヒータ２５を導通させると、発熱ヒータ２５は発熱し、貯湯槽内給水管２４内の水を加熱すると共に、貯湯槽２２内の水を加熱する。 When water begins to come out from the hot water tap connected to the hot water storage pipe 31 outside the hot water tank, when the hot water tap is closed and the heater 25 is turned on, the heater 25 generates heat, and the water in the hot water tank 24 And the water in the hot water tank 22 is heated.

この時、貯湯槽２２内の水は加熱されることにより対流し、貯湯槽２２内の上部に高温湯が滞留し、貯湯槽２２内の下部に低温湯が滞留する。
そして、貯湯槽２２内の水が所定温度に達した時、発熱ヒータ５の自己制御によって、発熱ヒータ２５の導通が遮断され、発熱ヒータ２５による加熱が停止する。この状態で、貯湯槽外給湯管３１に連結される給湯栓を開くと、給湯栓から貯湯槽外給湯管３１内の水が排出された後に貯湯槽２２内の高温湯が排出される。 At this time, the water in the hot water tank 22 is convected by being heated, and hot water stays in the upper part of the hot water tank 22, and low temperature hot water stays in the lower part of the hot water tank 22.
When the water in the hot water storage tank 22 reaches a predetermined temperature, the heating of the heating heater 25 is cut off by the self-control of the heating heater 5, and the heating by the heating heater 25 is stopped. In this state, when the hot water tap connected to the hot water storage tank outside hot water supply pipe 31 is opened, the hot water in the hot water storage tank 22 is discharged after the water in the hot water storage tank external hot water supply pipe 31 is discharged from the hot water tap.

この時、給湯栓から排出された水及び高温湯に相当する量の水が貯湯槽内給水管２４から給水され、給水によって貯湯槽２２内の湯温が下がると発熱ヒータ２５の自己制御により発熱ヒータ２５が導通され、発熱ヒータ２５の加熱が再開する。 At this time, water discharged from the hot water tap and water corresponding to high-temperature hot water are supplied from the hot water supply pipe 24 in the hot water tank, and when the hot water temperature in the hot water tank 22 is lowered by the water supply, heat is generated by self-control of the heater 25. The heater 25 is turned on and heating of the heat generating heater 25 is resumed.

前記貯湯槽内給水管２４から給水される水の水温は貯湯槽２２内の湯温よりも低いが、貯湯槽内給水管２４の先端２４ｂが貯湯槽２２内の下部位置に開口しているため、貯湯槽内給水管２４から給水される水が貯湯槽２２内の上部に滞留する高温湯と混合することがなく、高温湯は高温を維持できる。 Although the temperature of the water supplied from the hot water tank water supply pipe 24 is lower than the hot water temperature in the hot water tank 22, the tip 24 b of the hot water tank water pipe 24 opens at a lower position in the hot water tank 22. The water supplied from the hot water tank water supply pipe 24 does not mix with the hot water staying in the upper part of the hot water tank 22, and the hot water can maintain a high temperature.

湯が使用されない場合に於いても、時間の経過によって貯湯槽２２内の湯温は低下するが、発熱ヒータ２５の自己制御によって発熱ヒータ２５が再加熱され、貯湯槽２２内の湯温は略一定の温度に維持される。 Even when hot water is not used, the hot water temperature in the hot water storage tank 22 decreases with the passage of time, but the heat generating heater 25 is reheated by the self-control of the heat generating heater 25, and the hot water temperature in the hot water storage tank 22 is substantially reduced. A constant temperature is maintained.

この状態で、風呂循環注ぎ口２７から配管３２を介して風呂に湯を注ぎ、風呂で低温となった湯を配管３３を介して風呂循環戻り口２８から貯湯槽２２内に戻すことにより、風呂水を循環させ、風呂の湯の湯温の保持、或いは追い炊きをすることも可能である。この循環は図示しないポンプ等を利用して行われる。尚、風呂には前記貯湯槽外給湯管３１を介して給湯することも可能である。 In this state, hot water is poured into the bath from the bath circulation spout 27 via the pipe 32, and the low temperature hot water in the bath is returned from the bath circulation return port 28 into the hot water tank 22 via the pipe 33. It is also possible to circulate the water and maintain the hot water temperature of the bath water, or to cook again. This circulation is performed using a pump (not shown). It is also possible to supply hot water to the bath through the hot water storage pipe 31 outside the hot water tank.

斯くして、前記電気給湯器２１は貯湯槽２２内に給水口２３と連通する貯湯槽内給水管２４が渦巻き状に配設されると共に、該貯湯槽内給水管２４内に発熱ヒータ２５が配設されるので、前記電気給湯器(図１に於いて１)と同様に、深夜電力の利用に限定されることなく、いつでも加熱が可能であり、従って、大きな貯湯槽を必要とせず小型化が可能であると共に、貯湯量に制限されることがなく、必要な湯量を湯切れなく供給できる。そのため、小さなスペースに置くことができると共に、少量の湯量を必要とする場所に設置することが可能である。 Thus, in the electric water heater 21, the hot water tank water supply pipe 24 communicating with the water supply port 23 is disposed in a spiral shape in the hot water tank 22, and the heater 25 is provided in the hot water tank water supply pipe 24. As in the case of the electric water heater (1 in FIG. 1), it can be heated at any time without being limited to the use of late-night power, and therefore does not require a large hot water tank. In addition, the amount of hot water is not limited and the necessary amount of hot water can be supplied without running out. Therefore, it can be placed in a small space and installed in a place that requires a small amount of hot water.

又、貯湯槽内給水管２４内に発熱ヒータ２５が配設されているので、温度の低い水を集中的に加熱することにより、吸熱効率が高くなり、熱効率が良い。
更に、前記電気給湯器２１を小型に複数個形成し、適宜複数個所に設置することも可能であり、或いは、小型に複数個形成した電気給湯器２１，２１…を一箇所にまとめて大量の給湯を行うことも可能である。更に又、前記電気給湯器２１は大型に形成することも可能である。尚、その場合に於いては、発熱ヒータ２５の長さ、及び、貯湯槽内給水管２４の銅パイプの大きさを前述の寸法から適宜変更することも可能である。 Further, since the heater 25 is disposed in the hot water tank water supply pipe 24, heat absorption efficiency is increased and heat efficiency is improved by intensively heating water having a low temperature.
Further, it is possible to form a plurality of electric water heaters 21 in a small size and install them in a plurality of places as appropriate. Alternatively, a large number of electric water heaters 21, 21,. It is also possible to supply hot water. Furthermore, the electric water heater 21 can be formed in a large size. In this case, the length of the heater 25 and the size of the copper pipe of the hot water tank water supply pipe 24 can be appropriately changed from the above dimensions.

従って、前記電気給湯器２１は従来の深夜電力を利用した電気温水器と同様に、風呂、台所、洗面所等の給湯や、床暖房等の給湯に利用することが可能であると共に、それらを一括して給湯することも、個別に給湯することも可能である。 Therefore, the electric water heater 21 can be used for hot water such as baths, kitchens and washrooms, and hot water such as floor heating, as in the case of conventional electric water heaters using midnight power. Hot water can be supplied all at once or individually.

更に又、前記電気給湯器２１は電気加熱方式であるため、灯油や、ガスを使った給湯器のような臭い、音、排ガスの発生がない。
そして、貯湯槽内給水管２４は貯湯槽２２内に略水平面上に渦巻き状に配設されているので、貯湯槽２２の高さを低くすることができ、高さの低いスペースに置くことができる。 Furthermore, since the electric water heater 21 is an electric heating system, there is no generation of odor, sound, and exhaust gas as in a hot water heater using kerosene or gas.
And since the hot water tank water supply pipe 24 is spirally arranged in a substantially horizontal plane in the hot water tank 22, the hot water tank 22 can be lowered in height and placed in a low space. it can.

又、前記貯湯槽内給水管２４の先端は貯湯槽２２内の下部位置に開口しているので、貯湯槽内給水管２４の先端から供給される低温湯が貯湯槽２２内の高温湯に混合することを防止することができる。 Moreover, since the tip of the hot water tank water supply pipe 24 is opened at a lower position in the hot water tank 22, the low temperature hot water supplied from the front end of the hot water tank water pipe 24 is mixed with the hot water in the hot water tank 22. Can be prevented.

更に、前記貯湯槽内給水管２４は直径１５ｍｍ〜２５ｍｍ、好ましくは、直径２０ｍｍの銅パイプで形成されているので、熱伝導率が良く、加熱効率を高めることができる。 Furthermore, since the hot water storage tank water supply pipe 24 is formed of a copper pipe having a diameter of 15 mm to 25 mm, preferably 20 mm, the heat conductivity is good and the heating efficiency can be increased.

更に又、前記発熱ヒータ２５は２５ｍ〜３５ｍ、好ましくは３０ｍの長さに形成されているので、貯湯層２２内の水又は湯を広範囲に加熱し、加熱効率を高めることができる。 Furthermore, since the heater 25 is formed with a length of 25 m to 35 m, preferably 30 m, the water or hot water in the hot water storage layer 22 can be heated over a wide range, and the heating efficiency can be improved.

そして、前記貯湯槽２２の側部に風呂に湯を循環させるための風呂循環注ぎ口２７及び風呂循環戻り口２８が開穿されているので、風呂の湯を循環させて、風呂の湯温を一定に保持することができると共に、風呂の追い炊きにも利用することができる。 And since the bath circulation spout 27 and the bath circulation return port 28 for circulating hot water into the bath are opened in the side part of the hot water tank 22, the hot water of the bath is circulated to circulate the hot water temperature of the bath. It can be kept constant and can also be used for bathing.

（ａ）本発明の電気給湯器の正面縦断面図である。（ｂ）本発明の電気給湯器の側面図である。(A) It is a front longitudinal cross-sectional view of the electric water heater of this invention. (B) It is a side view of the electric water heater of this invention. （ａ）本発明の他の電気給湯器の平面断面図である。（ｂ）本発明の他の電気給湯器の側面図である。(A) It is a plane sectional view of other electric water heaters of the present invention. (B) It is a side view of the other electric water heater of this invention.

Explanation of symbols

１，２１電気給湯器
２，２２貯湯槽
３，２３給水口
４，２４貯湯槽内給水管
４ｂ，２４ｂ先端
５，２５発熱ヒータ
６，２６貯湯槽外給水管
７，２７風呂循環注ぎ口
８，２８風呂循環戻り口
DESCRIPTION OF SYMBOLS 1,21 Electric water heater 2,22 Hot water storage tank 3,23 Water supply port 4,24 Hot water storage tank water supply pipe 4b, 24b Tip 5,25 Heating heater 6,26 Hot water tank external water supply pipe 7,27 Bath circulation pouring spout 8, 28 Bath circulation return

Claims

An electric water heater, wherein a hot water tank water supply pipe communicating with a water supply port is spirally arranged in the hot water tank, and a heater is provided in the hot water tank water supply pipe.

2. The electric water heater according to claim 1, wherein the water storage pipe in the hot water tank is spirally disposed on a substantially vertical surface.

2. The electric water heater according to claim 1, wherein the hot water storage tank water supply pipe is spirally arranged on a substantially horizontal plane.

The electric water heater according to claim 1, 2, or 3, wherein a tip of the hot water storage tank water supply pipe is opened at a lower position in the hot water storage tank.

5. The electric water heater according to claim 1, 2, 3 or 4, wherein the hot water tank water supply pipe is formed of a copper pipe having a diameter of 15 to 25 mm.

The electric water heater according to claim 1, 2, 3, 4 or 5, wherein the heater is formed to a length of 25m to 35m.

The bath circulation pouring spout and the bath circulation return port for circulating hot water into the bath are opened at the side of the hot water storage tank, respectively. Electric water heater.