JP2003106646A - Electric water heater - Google Patents
Electric water heaterInfo
- Publication number
- JP2003106646A JP2003106646A JP2001300323A JP2001300323A JP2003106646A JP 2003106646 A JP2003106646 A JP 2003106646A JP 2001300323 A JP2001300323 A JP 2001300323A JP 2001300323 A JP2001300323 A JP 2001300323A JP 2003106646 A JP2003106646 A JP 2003106646A
- Authority
- JP
- Japan
- Prior art keywords
- water
- pipe
- heat exchange
- hot water
- reheating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 353
- 238000003303 reheating Methods 0.000 claims abstract description 60
- 238000009835 boiling Methods 0.000 claims abstract description 20
- 238000003860 storage Methods 0.000 claims abstract description 20
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 5
- 238000011105 stabilization Methods 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 235000001537 Ribes X gardonianum Nutrition 0.000 description 1
- 235000001535 Ribes X utile Nutrition 0.000 description 1
- 235000016919 Ribes petraeum Nutrition 0.000 description 1
- 244000281247 Ribes rubrum Species 0.000 description 1
- 235000002355 Ribes spicatum Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Landscapes
- Control For Baths (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は電気温水器に関し、
特に、風呂の追い焚き機能を有する電気温水器に関す
る。TECHNICAL FIELD The present invention relates to an electric water heater,
In particular, it relates to an electric water heater having a bath reheating function.
【０００２】[0002]
【従来の技術】図７に従来より知られている電気温水器
の一例の概略構成を示す。この電気温水器において、貯
湯タンク１０の内部は水で満たされており、図示せぬ制
御部がサーミスタ１２の出力信号に基づくフィードバッ
ク制御によってヒータ１４に適宜通電することにより、
貯湯タンク１０内の水は常時８０〜９０℃の高温に維持
される。使用者が開栓操作や給湯スイッチ操作を行う
と、貯湯タンク１０内の湯と給水管１６（減圧弁１７を
備える）から供給される水が混合弁１８に送られ、温水
が生成される。この温水は給湯管２０を通じて台所や浴
室等の給湯口（カラン、シャワー等）に供給される。2. Description of the Related Art FIG. 7 shows a schematic configuration of an example of a conventionally known electric water heater. In this electric water heater, the hot water storage tank 10 is filled with water, and a control unit (not shown) appropriately energizes the heater 14 by feedback control based on the output signal of the thermistor 12,
The water in the hot water storage tank 10 is constantly maintained at a high temperature of 80 to 90 ° C. When the user performs the opening operation or the hot water supply switch operation, the hot water in the hot water storage tank 10 and the water supplied from the water supply pipe 16 (including the pressure reducing valve 17) are sent to the mixing valve 18 to generate hot water. This hot water is supplied to the hot water supply port (currant, shower, etc.) of the kitchen, bathroom, etc. through the hot water supply pipe 20.
【０００３】このような通常の給湯系に加えて、図７の
電気温水器は風呂の追い焚きのための循環回路を備えて
いる。この循環回路は、貯湯タンク１０の上部の中に配
設された追い焚き用のコイル状配管２２（以下、追い焚
きコイル２２と呼ぶ）、追い焚きコイル２２と浴槽２４
のアダプタ２６（吸込口２６１、吐水口２６２を備え
る）とを接続する追い焚き配管２８から主として構成さ
れる。追い焚き配管２８には浴槽２４から追い焚きコイ
ル２２へ向かう戻り管２８１及び追い焚きコイル２２か
ら浴槽２４へ向かう往き管２８２が含まれる。戻り管２
８１には追い焚き用循環ポンプ３０、浴槽２４の水位を
検知するための水位センサ３２（水圧検知式）、循環回
路中の水流の有無を検出するための水流スイッチ３４、
循環回路を通断するための追い焚き電磁弁３６等が配設
されている。なお、図７ではアダプタ２６の吸込口２６
１と吐水口２６２が異なる高さにあるように描いている
が、実際には同じ高さである（本願図面の他の図でも同
様）。In addition to such a normal hot water supply system, the electric water heater of FIG. 7 is provided with a circulation circuit for reheating the bath. This circulation circuit is provided in the upper part of the hot water storage tank 10 with a coiled pipe 22 for reheating (hereinafter referred to as reheating coil 22), a reheating coil 22 and a bath 24.
It is mainly composed of a reheating pipe 28 for connecting to the adapter 26 (including a suction port 261 and a water discharge port 262). The reheating pipe 28 includes a return pipe 281 from the bathtub 24 to the reheating coil 22 and a forward pipe 282 from the reheating coil 22 to the bath 24. Return pipe 2
Reference numeral 81 denotes a reheating circulation pump 30, a water level sensor 32 (water pressure detection type) for detecting the water level in the bathtub 24, a water flow switch 34 for detecting the presence or absence of water flow in the circulation circuit,
A reheating solenoid valve 36 and the like for disconnecting the circulation circuit are provided. In FIG. 7, the suction port 26 of the adapter 26 is
1 and the spout 262 are drawn so as to have different heights, but they are actually the same height (the same applies to the other figures of the drawings of the present application).
【０００４】図７の電気温水器において、浴槽２４に十
分高い水位まで水が貯まった状態で追い焚き電磁弁３６
を開き、循環ポンプ３０を起動すると、浴槽２４の水が
アダプタ２６の吸込口２６１から戻り管２８１に吸引さ
れる。この水は、追い焚きコイル２２を流れる際に貯湯
タンク１０内の湯との熱交換によって加熱された後、往
き管２８２を通ってアダプタ２６の吐水口２６２から浴
槽２４に戻る。こうして風呂の追い焚きが行われるので
ある。In the electric water heater of FIG. 7, the reheating solenoid valve 36 is operated in a state where water is stored in the bathtub 24 to a sufficiently high water level.
And the circulation pump 30 is started, the water in the bathtub 24 is sucked into the return pipe 281 from the suction port 261 of the adapter 26. This water is heated by heat exchange with the hot water in the hot water storage tank 10 when flowing through the reheating coil 22, and then returns to the bathtub 24 from the water outlet 262 of the adapter 26 through the forward pipe 282. In this way, the bath is reheated.
【０００５】図７の電気温水器において、浴槽に所定水
位まで湯を貯める湯はり動作を実行するには、給湯電磁
弁３８及び給水電磁弁４０の両方を開くことにより、湯
と水を適宜割合で供給する。また、浴槽に貯まった湯の
温度を上げるために湯を追加供給するたし湯動作を実行
するには、給湯電磁弁３８を開くことにより、貯湯タン
ク１０の湯を風呂給湯管３９及び往き管２８２を通じて
浴槽２４に供給する。また、浴槽に貯まった湯の温度を
下げるために水を追加供給するさし水動作を実行するに
は、給水電磁弁４０を開くことにより、給水管１６から
供給される水を、さし水管４１及び戻り管２８１を通じ
て浴槽２４に供給する。In the electric water heater shown in FIG. 7, in order to carry out a hot water beam operation for storing hot water in a bathtub up to a predetermined water level, both the hot water supply solenoid valve 38 and the water supply solenoid valve 40 are opened to appropriately mix the hot water and the water. Supplied by. Further, in order to perform a hot water operation of additionally supplying hot water to raise the temperature of the hot water stored in the bathtub, the hot water supply solenoid valve 38 is opened to remove the hot water from the hot water storage tank 10 into the bath hot water supply pipe 39 and the forward pipe. Supply to the bathtub 24 through 282. Further, in order to perform the feed water operation of additionally supplying water to lower the temperature of the hot water stored in the bathtub, the water supplied from the water supply pipe 16 is supplied to the water supply pipe 41 by opening the water supply solenoid valve 40. Supply to the bathtub 24 through the return pipe 281.
【０００６】[0006]
【発明が解決しようとする課題】上記電気温水器におい
て、循環ポンプ３０が停止している間、追い焚きコイル
２２内に残留している水は貯湯タンク１０の湯との熱交
換によって８０〜９０℃の高温になっている。そして、
この熱湯は、次に循環ポンプ３０を起動した直後に追い
焚きコイル２２から押し出され、往き管２８２を流れ、
アダプタ２６から浴槽２４内に排出される。このため、
例えば浴槽２４の使用中に追い焚き運転を行うと、アダ
プタ２６から出てくる熱湯で使用者が火傷をするおそれ
がある。また、熱湯との接触により浴槽２４が損傷する
おそれもある。In the above electric water heater, while the circulation pump 30 is stopped, the water remaining in the reheating coil 22 is exchanged with the hot water in the hot water storage tank 10 by 80 to 90. It has reached a high temperature of ℃. And
This hot water is extruded from the reheating coil 22 immediately after the circulation pump 30 is activated, flows through the outflow pipe 282,
It is discharged from the adapter 26 into the bath 24. For this reason,
For example, if the reheating operation is performed while the bathtub 24 is in use, the hot water coming out of the adapter 26 may cause a burn to the user. In addition, the bathtub 24 may be damaged by contact with hot water.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
に成された本発明に係る電気温水器は、貯湯タンク、該
貯湯タンク内に配設された追い焚き用熱交換部、前記熱
交換部と浴槽のアダプタ部とを接続する戻り管及び往き
管を含む追い焚き用配管、及び、前記戻り管の内部の水
を前記アダプタ部から前記熱交換部へ送るための循環ポ
ンプを備える電気温水器において、前記循環ポンプの起
動後の所定時間の間、前記貯湯タンクの沸き上げ温度よ
り低温の水を前記熱交換部を経由せずに前記往き管に供
給する低温水供給手段を備えることを特徴とする。SUMMARY OF THE INVENTION An electric water heater according to the present invention, which has been made to solve the above-mentioned problems, comprises a hot water storage tank, a reheating heat exchange section arranged in the hot water storage tank, and the heat exchange. Electric hot water provided with a reheating pipe including a return pipe and a forward pipe for connecting the pipe part and the adapter part of the bathtub, and a circulation pump for sending water inside the return pipe from the adapter part to the heat exchange part. In the vessel, a low-temperature water supply means is provided for supplying water having a temperature lower than the boiling temperature of the hot water storage tank to the outflow pipe for a predetermined time after the circulation pump is started, without passing through the heat exchange section. Characterize.
【０００８】[0008]
【発明の実施の形態及び発明の効果】浴槽への熱湯の排
出による上記問題を解決するには、熱湯の温度を事前に
下げてから浴槽に排出するようにすればよい。熱湯の温
度を効率よく下げる方法の一つはその熱湯に低温の水を
混合することである。そこで、本発明では、熱交換部
（追い焚きコイルなど）から押し出される熱湯がポンプ
の作用で往き管を流れている間に該往き管に低温の水を
供給することにより、熱湯の温度を下げてから浴槽に送
るようにしたものである。BEST MODE FOR CARRYING OUT THE INVENTION In order to solve the above problems caused by discharging hot water into a bathtub, the temperature of the hot water may be lowered in advance and then discharged into the bathtub. One of the methods for efficiently lowering the temperature of hot water is to mix low temperature water with the hot water. Therefore, in the present invention, the temperature of the hot water is lowered by supplying low-temperature water to the forward pipe while the hot water pushed out from the heat exchange section (reheating coil, etc.) flows through the forward pipe by the action of the pump. After that, it was sent to the bathtub.
【０００９】ところで、一般に、電気温水器の本体内部
には多数の配管が配設されており、その中には貯湯タン
クの沸き上げ温度よりも低温の水が流れる配管もある。
このことに着目し、本発明の一形態では、前記低温水供
給手段が、前記低温の水を所定の配管から前記熱交換部
を経由することなく前記往き管に送るための送水管を含
んでいる。この電気温水器において、循環ポンプを運転
すると、熱交換部から往き管に押し出される熱湯と送水
管を通じて往き管に供給される低温の水が往き管の内部
で混合し、熱湯の温度が下がる。このように熱湯の温度
を下げて浴槽に送ることにより、火傷や浴槽損傷のおそ
れが少なくなるのである。By the way, generally, a large number of pipes are arranged inside the main body of the electric water heater, and among them, there is also a pipe through which water having a temperature lower than the boiling temperature of the hot water storage tank flows.
Focusing on this, in one embodiment of the present invention, the low-temperature water supply means includes a water pipe for sending the low-temperature water from a predetermined pipe to the outflow pipe without passing through the heat exchange section. There is. In this electric water heater, when the circulation pump is operated, the hot water extruded from the heat exchange section to the outflow pipe and the low-temperature water supplied to the outflow pipe through the water supply pipe are mixed inside the outflow pipe, and the temperature of the hot water falls. By lowering the temperature of the hot water and sending it to the bathtub in this way, the risk of burns and damage to the bathtub is reduced.
【００１０】本発明の一形態における電気温水器では、
前記送水管は、前記戻り管と前記往き管とを前記熱交換
部を経由することなく接続するバイパス管として構成さ
れる。このような配管構成は、循環ポンプを運転したと
きに浴槽から戻り管に吸引される浴槽水を前記低温の水
として利用することを目的としたものである。すなわ
ち、循環ポンプを運転すると、熱交換部から往き管に押
し出される熱湯とバイパス管を通じて往き管に供給され
る浴槽水が往き管の内部で混合し、熱湯の温度が下が
る。このように熱湯の温度を下げて浴槽に送ることによ
り、火傷や浴槽損傷のおそれが少なくなるのである。ま
た、本形態の電気温水器では、熱湯に混合させる低温水
として浴槽水を利用しているため、外部から別途低温水
を導入するための新たな配管等を用いる必要がなく、戻
り管と往き管をバイパス管で接続するという配管構成の
変更のみで実現可能である。In the electric water heater according to one aspect of the present invention,
The water supply pipe is configured as a bypass pipe that connects the return pipe and the forward pipe without passing through the heat exchange section. Such a piping configuration is intended to use the bath water sucked from the bath into the return pipe when the circulation pump is operated as the low temperature water. That is, when the circulation pump is operated, the hot water extruded from the heat exchange portion to the outflow pipe and the bath water supplied to the outflow pipe through the bypass pipe are mixed inside the outflow pipe, and the temperature of the hot water falls. By lowering the temperature of the hot water and sending it to the bathtub in this way, the risk of burns and damage to the bathtub is reduced. Further, in the electric water heater of the present embodiment, since the bath water is used as the low temperature water to be mixed with the hot water, there is no need to use a new pipe or the like for separately introducing the low temperature water from the outside, and the return pipe and the return pipe It can be realized only by changing the piping configuration in which the pipes are connected by bypass pipes.
【００１１】前記バイパス管を有する電気温水器におい
て、前記低温水供給手段は、例えば、前記戻り管を流れ
る水を前記熱交換部及び前記バイパス管のいずれかに選
択的に流すための流路切換手段を含み、該流路切換手段
を用いて、前記戻り管を流れる水を所定のデューティ比
で時分割的に熱交換部とバイパス管とに分配するような
構成とすることができる。上記流路切換手段は、例え
ば、バイパス管と追い焚き用配管の接続箇所に配設され
た三方弁と、該三方弁の方向を所定速度で切り換える駆
動手段とを含む構成とすることができる。なお、上記三
方弁と等価な構成及び作用を有する回路を複数の電磁弁
で構成してもよい。In the electric water heater having the bypass pipe, the low-temperature water supply means is, for example, a flow path switching device for selectively flowing the water flowing through the return pipe to either the heat exchange section or the bypass pipe. The flow passage switching means may be used to distribute the water flowing through the return pipe to the heat exchange section and the bypass pipe in a time division manner at a predetermined duty ratio. The flow path switching means may be configured to include, for example, a three-way valve arranged at a connection point between the bypass pipe and the reheating pipe, and a drive means for switching the direction of the three-way valve at a predetermined speed. It should be noted that a circuit having a configuration and an action equivalent to that of the above three-way valve may be configured by a plurality of solenoid valves.
【００１２】前記低温水供給手段を用いると、循環ポン
プの起動開始から所定時間の間、バイパス管を通じて往
き管に供給される浴槽水と熱交換部から往き管に押し出
される熱湯とが時分割的に交互に浴槽へ送られる。この
結果、アダプタ部からは熱湯と浴槽水とが交互に浴槽に
排出されることになる。このとき、熱湯と浴槽水とを切
り換える時間間隔を十分短くすれば、浴槽水と熱湯がア
ダプタ部に到達するまでに往き管の内部で多少混合する
ため、熱湯の温度は熱交換部内に残留していたときの温
度よりも多少低くなる。そして、時間の経過とともに、
アダプタ部からの排出水の温度の振幅は徐々に小さくな
り、十分に時間が経過した後には、最高温度でも貯湯タ
ンクの湯の温度より十分低くなる。こうして、熱湯が短
時間で大量に浴槽に流入することによる火傷や浴槽損傷
を防ぎつつ、熱交換部内に残った熱湯を全て浴槽に排出
することができる。When the low-temperature water supply means is used, the bath water supplied to the outflow pipe through the bypass pipe and the hot water pushed out from the heat exchanging portion to the outflow pipe for a predetermined time from the start of the circulation pump are time-divisional. Are alternately sent to the bathtub. As a result, hot water and bath water are alternately discharged from the adapter section into the bath. At this time, if the time interval for switching between the hot water and the bath water is sufficiently short, the bath water and the hot water will be mixed to some extent inside the outflow pipe before reaching the adapter part, so the temperature of the hot water remains in the heat exchange part. It will be slightly lower than the temperature when it was on. And over time,
The amplitude of the temperature of the water discharged from the adapter gradually decreases, and after a sufficient time has elapsed, even the maximum temperature becomes sufficiently lower than the temperature of the hot water in the hot water storage tank. In this way, it is possible to discharge all the hot water remaining in the heat exchange portion to the bath while preventing burns and damage to the bath due to a large amount of hot water flowing into the bath in a short time.
【００１３】また、前記バイパス管を用いる場合、前記
低温水供給手段は、前記戻り管を流れる水を前記熱交換
部及び前記バイパス管に可変な比率で連続的に分配する
ための連続分配手段を含む構成とすることもできる。こ
の構成では、戻り管に吸引される浴槽水と熱交換部から
押し出される熱湯が所定の比率で連続的に混合されてか
ら浴槽へ送る。このような低温水供給手段は、例えばバ
イパス管と往き管との接続箇所に配設された混合弁を含
む構成とすることができる。When the bypass pipe is used, the low temperature water supply means is a continuous distribution means for continuously distributing the water flowing through the return pipe to the heat exchange section and the bypass pipe at a variable ratio. It can also be configured to include. In this configuration, the bath water sucked into the return pipe and the hot water pushed out from the heat exchange section are continuously mixed at a predetermined ratio and then sent to the bath. Such low-temperature water supply means can be configured to include, for example, a mixing valve arranged at a connection point between the bypass pipe and the outflow pipe.
【００１４】ところで、本発明が関連する電気温水器に
おいては、熱交換部内の圧力低下による水の沸騰に起因
する水圧変動が配管を通じて水位センサに到達し、水位
検知に悪影響を与えることがあるという問題を考慮する
必要がある。例えば、図７に示した従来の電気温水器に
おいて、浴槽２４が追い焚きコイル２２より低い位置に
あると、その高低差（正確には浴槽２４の水面と追い焚
きコイル２２の高低差）に起因する水頭圧の分だけ追い
焚きコイル２２内の水圧が大気圧より低くなり、それに
応じて水の沸点が低くなる。また、設置場所の標高が高
い場合、低地に比べて大気圧そのものが低くなり、それ
に応じて水の沸点が低くなる。このような理由で生じる
沸点低下が過大であると、追い焚きコイル２２内の水の
沸点が貯湯タンク１０内に貯留された湯の温度（８０〜
９０℃）を下回り、追い焚きコイル２２内の水が沸騰し
てしまう。追い焚きコイル２２内の水が沸騰すると、循
環回路内の水圧が沸騰の影響を受けて変動し、その変動
が水位センサ３２にも伝わる。この結果、水位センサ３
２の出力は浴槽２４の水位に正しく対応しなくなるた
め、例えば浴槽２４の水位を適正範囲に維持する制御に
おいて誤動作が起きたりするのである。By the way, in the electric water heater to which the present invention is related, the water pressure fluctuation caused by the boiling of water due to the pressure drop in the heat exchange section may reach the water level sensor through the pipe and adversely affect the water level detection. You need to consider the problem. For example, in the conventional electric water heater shown in FIG. 7, when the bathtub 24 is located at a position lower than the reheating coil 22, the height difference (to be precise, the difference in height between the water surface of the bathtub 24 and the reheating coil 22) is caused. The water pressure in the reheating coil 22 becomes lower than the atmospheric pressure by the amount of the water head pressure to be generated, and the boiling point of the water becomes lower accordingly. In addition, when the altitude of the installation location is high, the atmospheric pressure itself becomes lower than that in the lowland, and the boiling point of water becomes lower accordingly. If the boiling point decrease caused by such a reason is too large, the boiling point of the water in the reheating coil 22 will be the temperature of the hot water stored in the hot water storage tank 10 (80-
90 ° C.), the water in the reheating coil 22 will boil. When the water in the reheating coil 22 boils, the water pressure in the circulation circuit fluctuates under the influence of boiling, and the fluctuation is also transmitted to the water level sensor 32. As a result, the water level sensor 3
Since the output of No. 2 does not correspond to the water level of the bathtub 24 correctly, for example, a malfunction may occur in the control for maintaining the water level of the bathtub 24 in the proper range.
【００１５】上記に加えて、上記バイパス管を用いる場
合は次のことを考慮する必要がある。すなわち、浴槽の
水位を検出するための水位センサは、例えばバイパス管
とアダプタ部との間で戻り管（又は往き管）上に配設す
ることが可能であるが、このような配置を採用する場
合、熱交換部内での水圧変動が水位センサに伝わる経路
としては、戻り管（又は往き管）のみを通る第一の経路
の他に、往き管（又は戻り管）、バイパス管及び戻り管
（又は往き管）を通る第二の経路が存在することにな
る。従って、この両方の経路を遮断しなければ、水圧変
動による水位検知への悪影響を阻止することはできな
い。そこで、浴槽の水位を検出するための水位センサを
前記バイパス管と前記アダプタ部との間で前記追い焚き
用配管に配設する場合には、更に、前記熱交換部から前
記バイパス管を通じて前記水位センサに至る流路を遮断
するための流路遮断手段を設けることが好ましい。な
お、このようにバイパス管を遮断する手段の他に、熱交
換部から戻り管又は往き管のみを通じて直接水位センサ
に至る流路を遮断する手段も併用する必要があることは
いうまでもない。In addition to the above, it is necessary to consider the following when using the bypass pipe. That is, the water level sensor for detecting the water level in the bathtub can be arranged on the return pipe (or the outflow pipe) between the bypass pipe and the adapter part, for example, but such an arrangement is adopted. In this case, in addition to the first path that passes only the return pipe (or the return pipe), the transfer pipe (or the return pipe), the bypass pipe, and the return pipe ( Or there will be a second route through the outflow). Therefore, it is impossible to prevent the adverse effect on the water level detection due to the fluctuation of the water pressure unless both the routes are cut off. Therefore, when a water level sensor for detecting the water level of the bathtub is arranged in the reheating pipe between the bypass pipe and the adapter part, further, the water level is passed from the heat exchange part through the bypass pipe. It is preferable to provide a flow path blocking means for blocking the flow path to the sensor. Needless to say, in addition to the means for shutting off the bypass pipe in this way, it is also necessary to use means for shutting off the flow path directly from the heat exchange section to the water level sensor only through the return pipe or the forward pipe.
【００１６】本発明の更に別の形態における電気温水器
（以下、「第二の電気温水器」と呼ぶ）は、前記戻り管
及び前記アダプタ部を通じて前記浴槽にさし水を行うた
めのさし水手段を更に備え、前記送水管は前記さし水が
流れる配管と前記往き管とを接続するさし水導入管とし
て構成される。An electric water heater (hereinafter referred to as a "second electric water heater") according to still another aspect of the present invention further comprises a water supply means for supplying water to the bathtub through the return pipe and the adapter section. The water supply pipe is configured as a feed water introducing pipe that connects the pipe through which the feed water flows and the going pipe.
【００１７】第二の電気温水器において、循環ポンプの
起動後の所定時間の間、さし水手段によるさし水運転を
実行すると、熱交換部から往き管に押し出される熱湯に
さし水導入管からさし水が注入され、熱湯の温度が低下
する。このように熱湯の温度を下げて浴槽に送ることに
より、火傷や浴槽損傷のおそれが少なくなるのである。
また、第二の電気温水器は、風呂追い焚き機能を有する
電気温水器に従来より備えられているさし水供給手段を
利用しているため、配管構成のわずかな変更だけで実現
可能である。In the second electric water heater, when the feed water operation by the feed water means is executed for a predetermined time after the circulation pump is started, the feed water is injected from the feed water introduction pipe into the hot water pushed out from the heat exchange section to the outflow pipe. , The temperature of boiling water drops. By lowering the temperature of the hot water and sending it to the bathtub in this way, the risk of burns and damage to the bathtub is reduced.
Further, the second electric water heater uses the cutting water supply means conventionally provided in the electric water heater having the bath reheating function, so that it can be realized by only a slight change in the piping configuration.
【００１８】[0018]
【実施例】本発明に係る電気温水器の実施例について図
面を参照しながら以下に説明する。なお、以下の説明に
おいて、図７の従来の電気温水器について既に説明した
構成要素と機能的に同一とみなされる構成要素には同一
の符号を付し、その説明を適宜省略する。Embodiments of the electric water heater according to the present invention will be described below with reference to the drawings. In the following description, the components that are considered to be functionally the same as the components already described for the conventional electric water heater of FIG. 7 are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
【００１９】図１に本発明に係る電気温水器の一実施例
の概略構成を示す。本実施例の電気温水器において、通
常の給湯系による浴室や台所等への給湯動作は図７の電
気温水器と同様に行われる。一方、浴槽への給湯／給水
動作（湯はり動作、たし湯動作、さし水動作等）につい
ては上記２つの電気温水器の構成及び動作は異なってい
る。すなわち、図７の電気温水器では浴槽２４への給湯
及び給水をそれぞれ独立した流路を通じて行うが、図１
の電気温水器では、混合弁４２により貯湯タンク１０か
らの湯と給水管１６からの水とを任意の割合で混合し、
風呂給湯管４４及び戻り管２８１を通じて浴槽２４へ供
給するような構成を採用している。例えば、図１の電気
温水器でたし湯をしたい場合は、給湯電磁弁３８を開く
とともに給水電磁弁４０を閉じることにより、湯だけを
浴槽２４に供給することができる。一方、さし水をした
い場合は、給水電磁弁４０を開くとともに給湯電磁弁３
８を閉じることにより、水だけを浴槽２４に供給するこ
とができる。FIG. 1 shows the schematic construction of an embodiment of the electric water heater according to the present invention. In the electric water heater of the present embodiment, the hot water supply operation to the bathroom, kitchen, etc. by the normal hot water supply system is performed in the same manner as the electric water heater of FIG. 7. On the other hand, regarding the hot water supply / water supply operation (hot water operation, hot water operation, feed water operation, etc.), the configurations and operations of the two electric water heaters are different. That is, in the electric water heater of FIG. 7, hot water and water are supplied to the bathtub 24 through independent flow paths.
In the electric water heater, the mixing valve 42 mixes the hot water from the hot water storage tank 10 and the water from the water supply pipe 16 at an arbitrary ratio,
The bath water supply pipe 44 and the return pipe 281 are used to supply the bath water to the bathtub 24. For example, when it is desired to supply hot water with the electric water heater of FIG. 1, only the hot water supply solenoid valve 38 is opened and the water supply solenoid valve 40 is closed, so that only the hot water can be supplied to the bathtub 24. On the other hand, when water is to be supplied, the water supply solenoid valve 40 is opened and the hot water supply solenoid valve 3 is opened.
Only water can be supplied to the bath 24 by closing 8.
【００２０】上記に加えて、図１の電気温水器には、戻
り管２８１と往き管２８２とを接続するバイパス管４
６、バイパス管４６と戻り管２８１との接続箇所に配設
された三方弁４８、電気温水器の各部を制御するための
制御部５０が備えられている。三方弁４８は、図２に示
したように下記３通りの状態Ａ〜Ｃをとりうる。（状態
Ａ）戻り管２８１を流れる浴槽水をバイパス管４６を通
じて往き管２８２へ送る状態。（状態Ｂ）戻り管２８１
を流れる浴槽水を追い焚きコイル２２の方へ送る状態。
（状態Ｃ）戻り管２８１の内部での浴槽水の流れを止
め、バイパス管４６にも追い焚きコイル２２にも水を送
らない状態。In addition to the above, the electric water heater of FIG. 1 has a bypass pipe 4 connecting a return pipe 281 and a forward pipe 282.
6, a three-way valve 48 arranged at the connection between the bypass pipe 46 and the return pipe 281, and a control unit 50 for controlling each part of the electric water heater. The three-way valve 48 can take the following three states A to C as shown in FIG. (State A) A state in which bathtub water flowing through the return pipe 281 is sent to the outgoing pipe 282 through the bypass pipe 46. (State B) Return pipe 281
A state in which the water in the bathtub flowing through is sent to the reheating coil 22.
(State C) A state in which the flow of bath water inside the return pipe 281 is stopped and water is not sent to the bypass pipe 46 or the reheating coil 22.
【００２１】図１の電気温水器において、風呂の追い焚
き運転等のために循環ポンプ３０を起動するとき、制御
部５０は、循環ポンプ３０の起動と同時またはそれと相
前後して三方弁４８の状態切換操作を開始する。三方弁
４８の状態切換操作とは、三方弁４８の状態を状態Ａと
状態Ｂとの間で周期的に切り換える操作のことを言う。
なお、三方弁４８の構成によっては、上記２つの状態を
切り換える行程の間に一時的に三方弁４８が状態Ｃをと
ることもあるが、状態Ａと状態Ｂの間にこのような中間
状態が存在する場合も、「状態Ａと状態Ｂとの間で周期
的に切り換える操作」に該当するものとする。In the electric water heater of FIG. 1, when the circulation pump 30 is started for reheating the bath or the like, the control unit 50 controls the three-way valve 48 at the same time as the start of the circulation pump 30 or before or after the start of the circulation pump 30. Start the state switching operation. The state switching operation of the three-way valve 48 means an operation of periodically switching the state of the three-way valve 48 between the state A and the state B.
Depending on the configuration of the three-way valve 48, the three-way valve 48 may temporarily be in the state C during the process of switching the above two states, but such an intermediate state between the state A and the state B may occur. Even if it exists, it shall correspond to the "operation for periodically switching between state A and state B".
【００２２】上記のような状態切換操作の結果、往き管
２８２の内部では三方弁４８の状態Ａ及びＢに対応する
次の２つの状態Ａ’及びＢ’が交互に発生する。
（状態Ａ’）バイパス管４６からの浴槽水が往き管２８
２に流入し、アダプタ２６に向けて流れる状態。
（状態Ｂ’）追い焚きコイル２２内の熱湯が戻り管２８
１からの浴槽水に押されて往き管２８２に流入し、アダ
プタ２６に向けて流れる状態。As a result of the above state switching operation, the following two states A'and B'corresponding to the states A and B of the three-way valve 48 are alternately generated inside the outflow pipe 282. (State A ′) Bath water from the bypass pipe 46 goes out the pipe 28
The state of flowing into 2 and flowing toward the adapter 26. (State B ′) The hot water in the reheating coil 22 returns to the return pipe 28.
A state in which the water is pushed by the bath water from No. 1, flows into the outflow pipe 282, and flows toward the adapter 26.
【００２３】三方弁４８の状態を切り換える周期を十分
に短く設定すると、追い焚きコイル２２内に溜まった熱
湯は一度に往き管２８２に押し出されてしまうことな
く、いわば複数回に小分けされた形で徐々に往き管２８
２に押し出されることになる。この結果、アダプタ２６
から浴槽に排出される水の温度は、図３（Ａ）のグラフ
に示したように、追い焚きコイル２２から押し出された
湯が排出されるときには高くなり、バイパス管４６から
の浴槽水が排出されるときには低くなるというように上
昇／下降を繰り返しながら、徐々に安定していく。そし
て、水温変動の振幅が十分に小さくなったところで三方
弁４８を状態Ｂにすると、いわゆる追い焚き運転（浴槽
水を追い焚きコイル２２で適温にして浴槽２４に戻す）
が始まり、アダプタ２６から浴槽２４に追い焚きのため
の適温となった温水が供給されるようになる。If the cycle for switching the state of the three-way valve 48 is set to be sufficiently short, the hot water accumulated in the reheating coil 22 will not be extruded into the outflow pipe 282 at one time, but it will be divided into a plurality of times. The going pipe 28 gradually
It will be pushed to 2. As a result, the adapter 26
As shown in the graph of FIG. 3 (A), the temperature of the water discharged from the tub to the tub becomes high when the hot water pushed out from the reheating coil 22 is discharged, and the tub water discharged from the bypass pipe 46 is discharged. It gradually becomes stable while repeating rising and falling such that it becomes lower when it is performed. Then, when the three-way valve 48 is set to the state B when the amplitude of the fluctuation of the water temperature has become sufficiently small, so-called reheating operation (bath water is returned to the tub 24 at an appropriate temperature by the reheating coil 22).
Then, hot water having a suitable temperature for reheating is supplied from the adapter 26 to the bathtub 24.
【００２４】比較のため、従来の電気温水器においてア
ダプタ２６から排出される水の温度変化を図３（Ｂ）に
示す。従来の電気温水器では、循環ポンプを起動した直
後に追い焚きコイル２２内の熱湯が一度に排出されてし
まうため、図３（Ｂ）に示したようにアダプタ２６から
の排出水の温度が一時的に貯湯タンク１０の沸き上げ温
度と同程度まで上昇し、火傷や浴槽損傷のおそれがあっ
た。これに対して、本図１の電気温水器では、最初の熱
湯の排出時でも水温は沸き上げ温度に到達することはな
く、火傷や浴槽損傷のおそれは極めて少ない。For comparison, the temperature change of the water discharged from the adapter 26 in the conventional electric water heater is shown in FIG. 3 (B). In the conventional electric water heater, since the hot water in the reheating coil 22 is discharged at once immediately after the circulation pump is started, the temperature of the discharge water from the adapter 26 is temporarily changed as shown in FIG. 3 (B). Then, the temperature rises to about the same as the boiling temperature of the hot water storage tank 10, which may cause burns or damage to the bath. On the other hand, in the electric water heater of FIG. 1, the water temperature does not reach the boiling temperature even when the hot water is first discharged, and the risk of burns and bathtub damage is extremely low.
【００２５】図１の電気温水器において、三方弁４８を
図２の状態Ｃに設定すると、追い焚きコイル２２から水
位センサ３２へ至る２つの経路、すなわち、戻り管２８
１のみを通る第一の経路と、往き管２８２、バイパス管
４６及び戻り管２８１を通る第二の経路がいずれも遮断
された状態になる。このようにすれば、仮に追い焚きコ
イル２２内の圧力低下による水の沸点低下に起因する水
の沸騰が発生しても、それによる水圧変動が水位センサ
３２に悪影響を及ぼす恐れはなく、水位センサ３２の出
力電圧に基づいて安定的に浴槽２４の水位を検出するこ
とができる。In the electric water heater of FIG. 1, when the three-way valve 48 is set to the state C of FIG. 2, there are two paths from the reheating coil 22 to the water level sensor 32, that is, the return pipe 28.
The first path passing only 1 and the second path passing through the forward pipe 282, the bypass pipe 46, and the return pipe 281 are all blocked. With this configuration, even if water boiling occurs due to a decrease in boiling point of water due to a decrease in pressure in the reheating coil 22, the fluctuation in water pressure will not adversely affect the water level sensor 32. The water level in the bathtub 24 can be stably detected based on the output voltage of 32.
【００２６】図４に本発明に係る電気温水器の別の実施
例の概略構成を示す。図４の電気温水器は図１の電気温
水器の三方弁４８の代わりに混合弁５２を備えている。
混合弁５２はアダプタ２６から戻り管２８１に導入され
た浴槽水を連続的にバイパス管４６及び追い焚きコイル
２２に分配するために用いられている。浴槽水の分配比
率は段階的又は連続的に変化させることができ、例え
ば、バイパス管４６又は追い焚きコイル２２のいずれか
一方にのみ浴槽水を送ることも可能である。FIG. 4 shows a schematic construction of another embodiment of the electric water heater according to the present invention. The electric water heater of FIG. 4 includes a mixing valve 52 instead of the three-way valve 48 of the electric water heater of FIG.
The mixing valve 52 is used for continuously distributing the bath water introduced from the adapter 26 to the return pipe 281 to the bypass pipe 46 and the reheating coil 22. The distribution ratio of bath water can be changed stepwise or continuously, and for example, it is also possible to send the bath water to only one of the bypass pipe 46 and the reheating coil 22.
【００２７】いま、浴槽水をバイパス管４６及び追い焚
きコイル２２に分配する比率をｒ：（１−ｒ）、循環ポ
ンプ３０を起動してからアダプタ２６からの排出水の最
高温度をＴｍａｘ、循環ポンプ３０を起動してから同水
温が安定するまでの時間（安定化時間）をｔとする（図
５参照）。この場合、バイパス管４６に浴槽水を送る比
率ｒを大きく設定すると最高温度Ｔｍａｘは低くなるが
安定化時間ｔは長くなり、比率ｒを小さく設定すると最
高温度Ｔｍａｘは高くなるが安定化時間ｔは短くなる。
このように、図４の電気温水器では、混合弁５２による
浴槽水の分配比率を変更することにより、例えばアダプ
タ２６からの排出水の最高温度Ｔｍａｘを低くすること
を優先したり、逆に排出水の水温の安定化時間ｔを短く
することを優先するというように、目的に応じて柔軟に
動作設定を変更することができる。Now, the ratio of distributing the bath water to the bypass pipe 46 and the reheating coil 22 is r: (1-r), the maximum temperature of the water discharged from the adapter 26 after starting the circulation pump 30 is Tmax, and the circulation is performed. The time from the start of the pump 30 to the stabilization of the water temperature (stabilization time) is t (see FIG. 5). In this case, if the ratio r for sending the bath water to the bypass pipe 46 is set large, the maximum temperature Tmax becomes low but the stabilization time t becomes long, and if the ratio r is set small, the maximum temperature Tmax becomes high but the stabilization time t becomes It gets shorter.
As described above, in the electric water heater of FIG. 4, by changing the distribution ratio of the bath water by the mixing valve 52, for example, priority is given to lowering the maximum temperature Tmax of the discharge water from the adapter 26, or conversely the discharge is performed. The operation setting can be flexibly changed according to the purpose, such as giving priority to shortening the stabilization time t of the water temperature of water.
【００２８】また、図４の電気温水器では、戻り管２８
１上の追い焚き電磁弁３６がバイパス管４６と戻り管２
８１との接続箇所に対して水位センサ３２側に配置され
ている。このような配置によれば、追い焚き電磁弁３６
を閉成するだけで、追い焚きコイル２２から水位センサ
３２に至る２つの経路が遮断され、追い焚きコイル２２
内での水圧変動が水位センサ３２による水位検出に悪影
響を及ぼすことがなくなる。Further, in the electric water heater of FIG. 4, the return pipe 28
The refueling solenoid valve 36 on the 1 has the bypass pipe 46 and the return pipe 2
It is arranged on the water level sensor 32 side with respect to the connection point with 81. According to such an arrangement, the reheating solenoid valve 36
By closing the reheating coil 22, the two paths from the reheating coil 22 to the water level sensor 32 are cut off, and the reheating coil 22 is closed.
Fluctuations in water pressure in the interior will not adversely affect water level detection by the water level sensor 32.
【００２９】図６に本発明の電気温水器の更に別の実施
例の概略構成を示す。図６の電気温水器は、風呂給湯管
４４の途中に配設された切替弁５４と、切替弁５４の２
つの出水口の一方と往き管２８２とを接続するさし水導
入管５５と、他方の出水口と戻り管２８１とを接続する
配管５６とを備えている。切替弁５４の方向は、風呂給
湯管４４を流れる水を配管５６を通じて戻り管２８１に
送る第一の方向Ｄ１と、前記水をさし水導入管５５を通
じて往き管２８２に送る第二の方向Ｄ２との間で切換可
能である。FIG. 6 shows a schematic construction of still another embodiment of the electric water heater of the present invention. The electric water heater of FIG. 6 includes a switching valve 54 disposed in the middle of the bath hot water supply pipe 44 and a switching valve 54.
The water supply pipe 55 connects one of the two water outlets to the outflow pipe 282, and the pipe 56 connects the other water outlet to the return pipe 281. The direction of the switching valve 54 is a first direction D1 for sending water flowing through the bath hot water supply pipe 44 to the return pipe 281 through the pipe 56, and a second direction D2 for sending the water through the feed water introduction pipe 55 to the outgoing pipe 282. It can be switched between.
【００３０】上記電気温水器において、切替弁５４の方
向をＤ１に設定すると、風呂給湯管４４を流れる水は戻
り管２８１に流入するようになるため、図１や図４の電
気温水器と同様に浴槽への給湯／給水動作（湯はり動
作、たし湯動作、さし水動作等）を実行することが可能
である。In the above electric water heater, when the direction of the switching valve 54 is set to D1, the water flowing through the bath hot water supply pipe 44 will flow into the return pipe 281. Therefore, like the electric water heater shown in FIGS. 1 and 4. Further, it is possible to perform hot water supply / water supply operations (hot water beam operation, hot water operation, cutting water operation, etc.) to the bathtub.
【００３１】次に、図６の電気温水器において風呂の追
い焚き等のために循環ポンプを起動する際の制御につい
て説明する。まず、切替弁５４の方向をＤ２の方向に設
定した後、さし水動作と同様の弁制御を行う（給水電磁
弁４０を開くとともに給湯電磁弁３８を閉じる）。する
と、給水管１６から供給される水が風呂給湯管４４及び
さし水導入管５５を通って往き管２８２に流入するよう
になる。この状態で、追い焚き電磁弁３６を開くととも
に循環ポンプ３０を起動すると、浴槽水がアダプタ２６
から戻り管２８１に導入され、更にその浴槽水に押し出
される形で追い焚きコイル２２内の熱湯が往き管２８１
に流れ込む。この熱湯はアダプタ２６に到達する前にさ
し水導入管５５からの水と混合される。水との混合の結
果温度の低下した熱湯は、アダプタ２６を通じて浴槽２
４に排出される。このように、図６の電気温水器では、
さし水との混合により熱湯の温度を下げてから浴槽に送
ることにより、火傷や浴槽損傷を効果的に防止すること
ができるのである。Next, the control when the circulation pump is started for reheating the bath in the electric water heater of FIG. 6 will be described. First, after setting the direction of the switching valve 54 to the direction of D2, the same valve control as that of the water supply operation is performed (the water supply solenoid valve 40 is opened and the hot water supply solenoid valve 38 is closed). Then, the water supplied from the water supply pipe 16 flows into the outflow pipe 282 through the bath hot water supply pipe 44 and the feed water introduction pipe 55. In this state, when the reheating solenoid valve 36 is opened and the circulation pump 30 is started, the bath water is changed to the adapter 26.
The hot water in the reheating coil 22 is introduced into the return pipe 281 from the outflow pipe 281 and pushed into the bath water.
Flow into. This hot water is mixed with the water from the tap water introducing pipe 55 before reaching the adapter 26. Hot water whose temperature has dropped as a result of mixing with water is passed through the adapter 26 to the bathtub 2
It is discharged to 4. Thus, in the electric water heater of FIG.
By lowering the temperature of the hot water by mixing with hot water and then sending it to the bathtub, it is possible to effectively prevent burns and damage to the bathtub.
【図１】 本発明に係る電気温水器の一実施例の概略構
成図。FIG. 1 is a schematic configuration diagram of an embodiment of an electric water heater according to the present invention.
【図２】 三方弁がとりうる３つの状態を示す図。FIG. 2 is a diagram showing three possible states of a three-way valve.
【図３】 アダプタから浴槽に排出される水の温度変化
を示すグラフ。FIG. 3 is a graph showing a temperature change of water discharged from an adapter into a bath.
【図４】 本発明に係る電気温水器の別の実施例の概略
構成図。FIG. 4 is a schematic configuration diagram of another embodiment of the electric water heater according to the present invention.
【図５】 図４の電気温水器のアダプタから浴槽に排出
される水の温度変化を示すグラフ。5 is a graph showing a temperature change of water discharged from an adapter of the electric water heater of FIG. 4 into a bath.
【図６】 本発明の電気温水器の更に別の実施例の概略
構成図。FIG. 6 is a schematic configuration diagram of still another embodiment of the electric water heater of the present invention.
【図７】 従来より知られている電気温水器の一例の概
略構成図。FIG. 7 is a schematic configuration diagram of an example of a conventionally known electric water heater.
１０…貯湯タンク １６…給水管 ２２…追い焚き用コイル状配管（追い焚きコイル） ２４…浴槽 ２６…アダプタ ２８…追い焚き配管 ２８１…戻り管 ２８２…往き管 ３０…循環ポンプ ３２…水位センサ ４４…風呂給湯管 ４６…バイパス管 ４８…三方弁 ５０…制御部 ５２…混合弁 ５４…切替弁 ５５…さし水導入管 10 ... Hot water storage tank 16 ... Water pipe 22 ... Reheating coil-shaped pipe (reheating coil) 24 ... Bathtub 26 ... Adapter 28 ... Reheating piping 281 ... Return pipe 282 ... Outgoing pipe 30 ... Circulation pump 32 ... Water level sensor 44 ... Bath hot water pipe 46 ... Bypass pipe 48 ... Three-way valve 50 ... Control unit 52 ... Mixing valve 54 ... Switching valve 55 ... Fresh water introduction pipe
フロントページの続き (72)発明者 志智 義範 神戸市東灘区魚崎浜町43番１号 日本ユプ ロ株式会社内 (72)発明者 酒井 英雄 神戸市東灘区魚崎浜町43番１号 日本ユプ ロ株式会社内 (72)発明者 中野 清隆 神戸市東灘区魚崎浜町43番１号 日本ユプ ロ株式会社内 (72)発明者 上田 進久 神戸市東灘区魚崎浜町43番１号 日本ユプ ロ株式会社内 (72)発明者 大江 俊春 神戸市東灘区魚崎浜町43番１号 日本ユプ ロ株式会社内 Ｆターム(参考） 3L024 CC05 CC18 DD03 DD04 DD14 DD17 DD23 DD27 DD28 GG05 GG12 GG28 GG33 HH13 HH15 HH18 HH19 HH23 HH31 Continued front page (72) Inventor Yoshinori Shichi 43-1, Uozakihama-cho, Higashinada-ku, Kobe Within the corporation (72) Inventor Hideo Sakai 43-1, Uozakihama-cho, Higashinada-ku, Kobe Within the corporation (72) Inventor Kiyotaka Nakano 43-1, Uozakihama-cho, Higashinada-ku, Kobe Within the corporation (72) Inventor Susumu Ueda 43-1, Uozakihama-cho, Higashinada-ku, Kobe Within the corporation (72) Inventor Toshiharu Oe 43-1, Uozakihama-cho, Higashinada-ku, Kobe Within the corporation F-term (reference) 3L024 CC05 CC18 DD03 DD04 DD14 DD17 DD23 DD27 DD28 GG05 GG12 GG28 GG33 HH13 HH15 HH18 HH19 HH23 HH31
Claims (7)
た追い焚き用熱交換部、前記熱交換部と浴槽のアダプタ
部とを接続する戻り管及び往き管を含む追い焚き用配
管、及び、前記戻り管の内部の水を前記アダプタ部から
前記熱交換部へ送るための循環ポンプを備える電気温水
器において、 前記循環ポンプの起動後の所定時間の間、前記貯湯タン
クの沸き上げ温度より低温の水を前記熱交換部を経由せ
ずに前記往き管に供給する低温水供給手段を備えること
を特徴とする電気温水器。1. A hot water storage tank, a reheating heat exchange section disposed in the hot water storage tank, a reheating pipe including a return pipe and a forward pipe connecting the heat exchange unit and a bathtub adapter, and In an electric water heater provided with a circulation pump for sending the water inside the return pipe from the adapter section to the heat exchange section, the boiling temperature of the hot water storage tank is higher than the boiling temperature of the hot water tank for a predetermined time after the circulation pump is started. An electric water heater comprising low-temperature water supply means for supplying low-temperature water to the outflow pipe without passing through the heat exchange section.
所定の配管から前記熱交換部を経由することなく前記往
き管に送るための送水管を含むことを特徴とする請求項
１に記載の電気温水器。2. The low temperature water supply means includes a water supply pipe for sending the low temperature water from a predetermined pipe to the outflow pipe without passing through the heat exchange section. The described electric water heater.
とを前記熱交換部を経由することなく接続するバイパス
管であることを特徴とする請求項２に記載の電気温水
器。3. The electric water heater according to claim 2, wherein the water supply pipe is a bypass pipe that connects the return pipe and the outflow pipe without passing through the heat exchange section.
れる水を前記熱交換部及び前記バイパス管のいずれかに
選択的に流すための流路切換手段を含み、該流路切換手
段を用いて、前記戻り管を流れる水を所定のデューティ
比で時分割的に熱交換部とバイパス管とに分配すること
を特徴とする請求項３に記載の電気温水器。4. The low temperature water supply means includes flow path switching means for selectively flowing water flowing through the return pipe to either the heat exchange section or the bypass pipe, and the flow path switching means is provided. The electric water heater according to claim 3, wherein the water flowing through the return pipe is time-divisionally distributed to the heat exchange section and the bypass pipe at a predetermined duty ratio.
れる水を前記熱交換部及び前記バイパス管に可変な比率
で連続的に分配するための連続分配手段を含むことを特
徴とする請求項３に記載の電気温水器。5. The low temperature water supply means includes a continuous distribution means for continuously distributing water flowing through the return pipe to the heat exchange section and the bypass pipe at a variable ratio. The electric water heater according to Item 3.
ス管と前記アダプタ部との間で前記追い焚き用配管に配
設された水位センサと、前記熱交換部から前記バイパス
管を通じて前記水位センサに至る流路を遮断するための
流路遮断手段とを備えることを特徴とする請求項３〜５
のいずれかに記載の電気温水器。6. A water level sensor disposed in the reheating pipe between the bypass pipe and the adapter part for detecting the water level in the bathtub, and the water level sensor from the heat exchange part through the bypass pipe. 6. A flow path blocking means for blocking the flow path leading to the flow path.
The electric water heater according to any one of 1.
前記浴槽にさし水を行うためのさし水手段を更に備え、
前記送水管は前記さし水が流れる配管と前記往き管とを
接続するさし水導入管であることを特徴とする請求項２
に記載の電気温水器。7. A water supply means for supplying water to the bathtub through the return pipe and the adapter portion is further provided.
The water supply pipe is a feed water introduction pipe that connects the pipe through which the feed water flows and the outflow pipe.
The electric water heater described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001300323A JP2003106646A (en) | 2001-09-28 | 2001-09-28 | Electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001300323A JP2003106646A (en) | 2001-09-28 | 2001-09-28 | Electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003106646A true JP2003106646A (en) | 2003-04-09 |
Family
ID=19120922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001300323A Pending JP2003106646A (en) | 2001-09-28 | 2001-09-28 | Electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003106646A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006177625A (en) * | 2004-12-24 | 2006-07-06 | Corona Corp | Hot water storing type water heater bath apparatus |
| CN103697593A (en) * | 2013-12-27 | 2014-04-02 | 卓朝旦 | Gas water heater heat exchange system with function of low flow protection |
| JP2016196913A (en) * | 2015-04-03 | 2016-11-24 | 株式会社コロナ | Three-way switching valve and bath device using the same |
-
2001
- 2001-09-28 JP JP2001300323A patent/JP2003106646A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006177625A (en) * | 2004-12-24 | 2006-07-06 | Corona Corp | Hot water storing type water heater bath apparatus |
| CN103697593A (en) * | 2013-12-27 | 2014-04-02 | 卓朝旦 | Gas water heater heat exchange system with function of low flow protection |
| JP2016196913A (en) * | 2015-04-03 | 2016-11-24 | 株式会社コロナ | Three-way switching valve and bath device using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2019007687A (en) | Hot water system | |
| JP2003106646A (en) | Electric water heater | |
| JP2003106643A (en) | Electric water heater | |
| CN111820752A (en) | Water channel system of drinking water supply device, control method of water channel system and drinking water supply device | |
| JP7151838B2 (en) | Storage hot water heater | |
| JP5458967B2 (en) | Hot water storage water heater | |
| KR960004846B1 (en) | Warm water storage heater and the installation equipped with such a storage heater | |
| JPS60221630A (en) | Controlling apparatus of hot water supply | |
| JP6286312B2 (en) | Hot water storage system | |
| JP2003004301A (en) | Hot-water storage-type electric water heater | |
| JP2004219004A (en) | Electric water heater provided with reheating function for bathwater | |
| JP2012220143A (en) | Mixing instantaneous hot-water supply system | |
| JP7369068B2 (en) | Hot water storage type water heater | |
| JP2005147438A (en) | Hot water storage type water heater | |
| JP4748201B2 (en) | Hot water storage hot water bath equipment | |
| JP3718653B2 (en) | Hot water mixing unit | |
| JP6805676B2 (en) | Bath hot water supply system | |
| JPH04208321A (en) | Automatic hot water feeder device | |
| JPH0649654Y2 (en) | Water heater | |
| KR101424404B1 (en) | Thermal apparatus | |
| JP2001099484A (en) | Hot water supply apparatus and hot water supply method | |
| JP5160255B2 (en) | Hot water storage hot water supply system | |
| JP2000161782A (en) | Bath hot-water supplier | |
| JPS6235581B2 (en) | ||
| JP2004232898A (en) | Water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20040823 |