JP3539046B2 - Gas water heater of bypass mixing type and water temperature sensitive type constant flow valve for bypass mixing used therein - Google Patents
Gas water heater of bypass mixing type and water temperature sensitive type constant flow valve for bypass mixing used thereinInfo
- Publication number
- JP3539046B2 JP3539046B2 JP05375096A JP5375096A JP3539046B2 JP 3539046 B2 JP3539046 B2 JP 3539046B2 JP 05375096 A JP05375096 A JP 05375096A JP 5375096 A JP5375096 A JP 5375096A JP 3539046 B2 JP3539046 B2 JP 3539046B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- temperature
- bypass
- flowing
- pipe
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 347
- 238000010079 rubber tapping Methods 0.000 claims description 31
- 230000001276 controlling effect Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 79
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 14
- 238000005192 partition Methods 0.000 description 9
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 102220638341 Spartin_F24D_mutation Human genes 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、バイパスミキシン
グ方式のガス給湯器及びそれに用いられるバイパスミキ
シング用水温感応型定流量弁に関し、さらに詳しくは給
水管を流れる水を熱交換器へ送ってガスバーナにより加
熱し出湯管へ導く本給水系のほかにその給水管を流れる
水の一部を熱交換器へ通さずに直接出湯管へ導くバイパ
ス管路を備え、熱交換器で加熱された湯をバイパス管路
より送り込まれた水で薄めて出湯させるいわゆるバイパ
スミキシング方式のガス給湯器及びそのガス給湯器にお
ける給水管を流れる水の温度に応じて該給水管を流れる
トータルの水の流量を規制し、かつそのトータルの流量
に対するバイパス管路へ流れる水のバイパス比率を制御
し得るバイパスミキシング用水温感応型定流量弁に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas water heater of a bypass mixing type and a water temperature sensitive type constant flow valve for bypass mixing used therefor. More specifically, the present invention relates to a method of sending water flowing through a water supply pipe to a heat exchanger and using a gas burner. In addition to the main water supply system that heats and guides the hot water to the hot water pipe, a bypass pipe that guides a part of the water flowing through the hot water pipe directly to the hot water pipe without passing through the heat exchanger is provided to bypass hot water heated by the heat exchanger. A so-called bypass mixing type gas water heater that dilutes and discharges water with water fed from a pipeline and regulates a flow rate of total water flowing through the water supply pipe according to a temperature of water flowing through a water supply pipe in the gas water heater, The present invention also relates to a bypass mixing water temperature sensitive type constant flow valve capable of controlling a bypass ratio of water flowing to a bypass pipe line with respect to the total flow rate.
【０００２】[0002]
【従来の技術】従来、給水管及び出湯管が配設される熱
交換器と、該熱交換器を加熱するガスバーナとを備え、
給水管より熱交換器へ通じる本給水系に水ガバナ（水圧
変動に応じて流水量を調節）を設け、該水ガバナに水温
変化に伴って流水量を調節可能な温度感応部材（形状記
憶合金バネ）を設けたガス給湯器が、例えば特開平２−
１６３５７７号公報、あるいは特開昭６３−３０３２８
１号公報により知られている。2. Description of the Related Art Conventionally, a heat exchanger provided with a water supply pipe and a tapping pipe, and a gas burner for heating the heat exchanger are provided.
A temperature governor (shape memory alloy) capable of adjusting the amount of flowing water with a change in water temperature is provided in the water governor (adjusting the amount of flowing water according to fluctuations in water pressure) in the water supply system leading from the water supply pipe to the heat exchanger. The gas water heater provided with a spring) is disclosed in, for example,
No. 163577 or JP-A-63-30328.
No. 1 publication.
【０００３】ところでこのようなガス給湯器にあって、
給水管と出湯管との間に給水管を流れる水を熱交換器を
通さずに直接出湯管へ導くためのバイパス路を設けたも
のも既に存在する。上述の特開昭６３−３０３２８１号
公報に示されるものはその典型的な例である。このバイ
パス路を備えたガス給湯器の概略構成を図４に示して説
明すれば次の通りである。尚、この図４に示した従来型
のガス給湯器の説明において、後に説明する本発明に係
るガス給湯器と同一の構成部材については同一符号を付
して説明している。By the way, in such a gas water heater,
There is already a bypass line provided between the water supply pipe and the tapping pipe for directly guiding water flowing through the water supply pipe to the tapping pipe without passing through the heat exchanger. The one disclosed in the above-mentioned JP-A-63-303281 is a typical example. The schematic configuration of the gas water heater provided with this bypass is shown in FIG. 4 and described as follows. In the description of the conventional gas water heater shown in FIG. 4, the same components as those of the gas water heater according to the present invention described later are denoted by the same reference numerals.
【０００４】この図示される従来型のガス給湯器１００
は、給水管１２と出湯管１４とが熱交換器１６を介して
継がれ、該熱交換器１６がケーシング（内胴）１８内に
配設されると共に、このケーシング１８内にはさらに前
記熱交換器１６を流れる水を加熱するためのガスバーナ
２０が該熱交換器１６の下方部位に配設されている。The conventional gas water heater 100 shown in FIG.
The water supply pipe 12 and the tapping pipe 14 are connected via a heat exchanger 16, and the heat exchanger 16 is arranged in a casing (inner body) 18, and the heat A gas burner 20 for heating water flowing through the exchanger 16 is provided at a lower portion of the heat exchanger 16.
【０００５】そして前記給水管１２には水の流れを検知
する水流スイッチ２２のほか該給水管１２を流れる水の
温度（Ｔ1 ）を検知する入水温（Ｔ1 ）サーミスタ２４
が設けられ、また前記出湯管１４には前記熱交換器１６
の出口側の出湯温度（Ｔ2 ）を検知するための出湯温
（Ｔ2 ）サーミスタ２６が設けられている。The water supply pipe 12 has a water flow switch 22 for detecting the flow of water and a water temperature (T 1 ) thermistor 24 for detecting the temperature (T 1 ) of water flowing through the water supply pipe 12.
The tapping pipe 14 is provided with the heat exchanger 16.
Is provided with a tapping temperature (T 2 ) thermistor 26 for detecting the tapping temperature (T 2 ) at the outlet side.
【０００６】また前記ガスバーナ２０のガス管２８には
元電磁弁３０、メイン電磁弁３２及び該ガス管２８を流
れるガスの流量を制御するガス比例弁３４がそれぞれ設
けられ、さらに前記ガスバーナ２０に燃焼用空気を供給
するため送風ファン３６が近接して設けられている。The gas pipe 28 of the gas burner 20 is provided with a main solenoid valve 30, a main solenoid valve 32, and a gas proportional valve 34 for controlling the flow rate of gas flowing through the gas pipe 28. A blower fan 36 is provided in proximity to supply air for use.
【０００７】一方前記給水管１２と出湯管１４との間に
は給水管１２を流れる水を前記熱交換器１６を通さずに
出湯管１４へ直接導くバイパス管路３８が設けられ、該
バイパス管路３８にはその管路を開閉するバイパス電磁
弁４０が設けられている。そして前記出湯管１４の下流
には前記熱交換器１６を介して出湯管１４へ導かれた湯
と前記バイパス管路３８を介して出湯管１４へ導かれた
水とを混合（ミキシング）した後の湯の温度（Ｔ3 ）を
検知する出湯温（Ｔ3 ）サーミスタ４２が設けられてい
る。On the other hand, a bypass line 38 is provided between the water supply pipe 12 and the tapping pipe 14 for directly guiding water flowing through the water supply pipe 12 to the tapping pipe 14 without passing through the heat exchanger 16. The bypass 38 is provided with a bypass solenoid valve 40 for opening and closing the conduit. Downstream of the tapping pipe 14, the hot water guided to the tapping pipe 14 via the heat exchanger 16 and the water guided to the tapping pipe 14 via the bypass line 38 are mixed (mixed). hot water temperature for detecting a temperature (T 3) of hot water (T 3) thermistor 42 is provided for.
【０００８】かくして前記給水管１２には前記バイパス
管路３８との分岐点よりも上流側に位置して水ガバナ
（定流量弁）１０２が設けられ、該水ガバナ１０２には
前記給水管１２を流れる水の量をその水温（Ｔ1 ）に応
じて規制する温度感応部材が備えられている（前述の特
開昭６３−３０３２８１号公報を参照）。Thus, the water supply pipe 12 is provided with a water governor (constant flow rate valve) 102 located upstream of the branch point with the bypass pipe 38. The water governor 102 is provided with the water supply pipe 12. A temperature-sensitive member for regulating the amount of flowing water in accordance with the water temperature (T 1 ) is provided (see the above-mentioned JP-A-63-303281).
【０００９】そしてこのように構成された従来型のガス
湯沸器１００では、給湯栓９２を開くことによって水流
スイッチ２２がオンし、バーナコントローラ８８からの
指令により送風ファン３８が駆動し、ガスバーナ２０へ
燃焼用空気が供給されると共に、ガスバーナ２０の元電
磁弁３２、メイン電磁弁３４、ガス比例弁３６が順次開
かれて燃焼ガスがガスバーナ２０へ供給され、イグナイ
タによる点火動作によってガスバーナ２０が点火され
る。In the conventional gas water heater 100 configured as described above, when the hot water tap 92 is opened, the water flow switch 22 is turned on, the blower fan 38 is driven by a command from the burner controller 88, and the gas burner 20 is turned on. The combustion air is supplied to the gas burner 20, and the main solenoid valve 32, the main solenoid valve 34, and the gas proportional valve 36 of the gas burner 20 are sequentially opened to supply the combustion gas to the gas burner 20, and the gas burner 20 is ignited by the ignition operation of the igniter. Is done.
【００１０】そしてこのガスバーナ２０の点火初期動作
段階では、給水管１２を流れる水の温度がその給水管１
２に設けられる入水温（Ｔ1 ）サーミスタ２４により検
知され、バーナコントローラ８８によって出湯管１４を
流れる湯の出湯温度が設定温度に近づくようにガスバー
ナ２０へ供給するガス量を調節するガス比例弁３４の開
度が調節される。In the initial operation stage of ignition of the gas burner 20, the temperature of the water flowing through the water supply pipe 12 is changed to the temperature of the water supply pipe 1.
The temperature of the gas proportional valve 34, which is detected by the incoming water temperature (T 1 ) thermistor 24 and is controlled by the burner controller 88 to adjust the amount of gas supplied to the gas burner 20 so that the tapping temperature of the hot water flowing through the tapping pipe 14 approaches the set temperature. The opening is adjusted.
【００１１】そしてガスバーナ２０の燃焼が安定状態に
なった以降は、出湯管１４に設けられる出湯温（Ｔ3 ）
サーミスタ４２からの信号を受けてバーナコントローラ
８８ではガス比例弁３４の比例弁電流回路と送風ファン
駆動回路とへ信号を送り、そのガス比例弁３４の開度と
送風ファン３６のファン回転数との比例制御を司ること
によって出湯温度が設定温度（ＴS ）に維持されるよう
に運転の管理がなされるものである。After the combustion of the gas burner 20 becomes stable, the tapping temperature (T 3 ) provided in the tapping pipe 14 is obtained.
In response to the signal from the thermistor 42, the burner controller 88 sends a signal to the proportional valve current circuit of the gas proportional valve 34 and the blower fan drive circuit, and determines the relationship between the opening degree of the gas proportional valve 34 and the fan speed of the blower fan 36. The operation is controlled such that the tapping temperature is maintained at the set temperature (T S ) by controlling the proportional control.
【００１２】[0012]
【発明が解決しようとする課題】しかしながら、このよ
うな従来型のガス給湯器１００において、バイパス管路
３８のバイパス電磁弁４０は上述のバーナコントローラ
８８へ指令信号を送るリモコン９０の操作による設定温
度（ＴS ）に応じてＯＮ／ＯＦＦされるようになってい
る。However, in such a conventional gas water heater 100, the bypass solenoid valve 40 in the bypass line 38 is set at a temperature set by operating the remote controller 90 which sends a command signal to the burner controller 88. It is turned on / off according to (T S ).
【００１３】たとえばリモコン９０の操作による設定温
度（ＴS ）が最低温度３８℃、最高温度７５℃の範囲に
おいて、３８℃〜４５℃のときにはバイパス電磁弁４０
をＯＮ（開）してバイパス管路３８を開くことにより前
記熱交換器１６により加熱され湯をバイパス管路３８を
介して導かれてきた水によりミキシングする状態とし、
設定温度（ＴS ）が４６℃〜７５℃のときにはＯＦＦ
（閉）として前記熱交換器１６で加熱された湯がストレ
ートに給湯栓９２より出湯されるようになっている。For example, when the set temperature (T S ) by operating the remote controller 90 is in the range of the minimum temperature of 38 ° C. and the maximum temperature of 75 ° C. and is between 38 ° C. and 45 ° C.,
Is turned on (opened) to open the bypass line 38, so that the hot water heated by the heat exchanger 16 is mixed with the water introduced through the bypass line 38,
OFF when the set temperature (T S ) is between 46 ° C and 75 ° C
As (closed), the hot water heated by the heat exchanger 16 is discharged straight from the hot-water tap 92.
【００１４】その場合に前記給水管１２を介してこのガ
ス給湯器に供給されるトータルの水の流量をＱ0 、この
トータルの水の流量のうち熱交換器１６へ供給される水
の流量Ｑ1 、バイパス管路３８へ流れる水の流量をＱ2
としたときのバイパス比率Ｑ2 ／Ｑ0 ×１００（％）
は、ストレートに出湯させる時や給水管１２を流れる水
の入水温度（Ｔ1 ）が低い時には熱交換器１６を通過す
る湯が沸騰しないように（例えば、熱交換器１６の出口
側の出湯温度（Ｔ2 ）が８５℃以下となるよう）、かつ
設定温度（ＴS ）がこのガス給湯器において設定できる
最低温度（例えば、３８℃）の時には熱交換器１６が冷
え過ぎてドレンが発生しないように設定されており、通
常バイパス比率Ｑ2 ／Ｑ0 ×１００（％）は「４９％」
と一定の比率となっている。In this case, the total flow rate of the water supplied to the gas water heater through the water supply pipe 12 is represented by Q 0 , and the flow rate Q of the water supplied to the heat exchanger 16 out of the total water flow rate is represented by Q 0 . 1. The flow rate of water flowing to the bypass line 38 is Q 2
Bypass ratio Q 2 / Q 0 × 100 (%)
Is to prevent the hot water passing through the heat exchanger 16 from boiling when the water is fed straight or when the incoming temperature (T 1 ) of the water flowing through the water supply pipe 12 is low (for example, the hot water outlet temperature at the outlet side of the heat exchanger 16). When (T 2 ) is not higher than 85 ° C.) and the set temperature (T S ) is the lowest temperature (for example, 38 ° C.) that can be set in the gas water heater, the heat exchanger 16 is too cold and no drain is generated. The normal bypass ratio Q 2 / Q 0 × 100 (%) is “49%”.
And a certain ratio.
【００１５】しかしながら、このバイパス比率の場合、
給水管１２を流れる水の入水温度（Ｔ1 ）が高い時、例
えば３０℃のときケーシング（内胴）の出口側の出湯温
度（Ｔ2 ）は試算によれば４５．５℃となり、熱交換器
の性能によってはバイパスミキシング方式といえどもド
レンが発生する場合があるとの問題があった。However, in the case of this bypass ratio,
When the incoming temperature (T 1 ) of the water flowing through the water supply pipe 12 is high, for example, 30 ° C., the outlet temperature (T 2 ) at the outlet side of the casing (inner body) is 45.5 ° C. according to a trial calculation, and heat exchange is performed. Depending on the performance of the vessel, there is a problem that the drain may occur even in the bypass mixing method.
【００１６】本発明の解決しようとする課題は、バイパ
スミキシング方式のガス給湯器において、給水管を流れ
る水の流水温度（Ｔ1 ）に応じてそのバイパス管路を流
れる水のバイパス比率を変化させる構造とすることによ
り高い入水温度の時にもケーシング（内胴）の出口側の
出湯温度（Ｔ2 ）をドレンが発生しない温度まで上げる
ことのできるようにすることにある。The problem to be solved by the present invention is to change the bypass ratio of water flowing through a bypass pipe in a gas water heater of a bypass mixing type according to the temperature (T 1 ) of flowing water flowing through a water supply pipe. It is an object of the present invention to make it possible to raise the outlet water temperature (T 2 ) at the outlet side of the casing (inner body) to a temperature at which drain does not occur even at a high water inlet temperature.
【００１７】[0017]
【課題を解決するための手段】この課題を解決するため
に本発明に係るバイパスミキシング方式のガス給湯器
は、給水管及び出湯管が配設される熱交換器と、該熱交
換器を加熱するガスバーナとを備えるガス給湯器におい
て、前記給水管と出湯管との間には前記給水管を流れる
水を前記熱交換器を介さずに直接出湯管へ導くバイパス
管路を備えると共に、前記給水管の前記バイパス管路と
の分岐部に前記給水管を流れる水の温度に応じて前記給
水管から前記バイパス管路へ流れる水のバイパス比率を
変える水温感応型定流量弁を備えていることを要旨とす
るものである。SUMMARY OF THE INVENTION In order to solve this problem, a gas water heater of the bypass mixing type according to the present invention is provided with a heat exchanger provided with a water supply pipe and a tapping pipe, and heating the heat exchanger. A gas water burner having a gas burner, which is provided with a bypass pipe line between the water supply pipe and the water discharge pipe for directly guiding water flowing through the water supply pipe to the water discharge pipe without passing through the heat exchanger; A water temperature-sensitive constant flow valve that changes a bypass ratio of water flowing from the water supply pipe to the bypass pipe in accordance with a temperature of water flowing through the water supply pipe at a branch portion of the pipe with the bypass pipe. It is a summary.
【００１８】このように構成された本発明に係るバイパ
スミキシング方式のガス給湯器によれば、給水管を流れ
る水は熱交換器を通るときにガスバーナにより加熱され
出湯管へ導かれ、一方給水管を流れる水の一部は熱交換
器を通らずにバイパス管路を介して出湯管へ導かれる。
そして、熱交換器を経て加熱された湯とバイパス管路を
通ってきた水とが混合（ミキシング）されて出湯され
る。According to the gas water heater of the bypass mixing type according to the present invention, the water flowing through the water supply pipe is heated by the gas burner when passing through the heat exchanger and guided to the hot water pipe. A part of the water flowing through the pipe is guided to the tap pipe via the bypass pipe without passing through the heat exchanger.
Then, the hot water heated via the heat exchanger and the water flowing through the bypass pipe are mixed (mixed) and discharged.
【００１９】そのときに給水管を流れる水の温度に応じ
てその給水管を流れるトータルの流水量が水温感応型定
流量弁のガバナ機能によって制御されると同時にその水
温感応型定流量弁によってそのトータルの流水量に対す
るバイパス管路へ流れる水の流量、すなわちバイパス比
率が調整される。At this time, the total amount of water flowing through the water supply pipe is controlled by the governor function of the water temperature-sensitive constant flow valve according to the temperature of the water flowing through the water supply pipe, and at the same time, the water flow is controlled by the water temperature-sensitive constant flow valve. The flow rate of the water flowing to the bypass pipe with respect to the total flowing water amount, that is, the bypass ratio is adjusted.
【００２０】実際には給水管を流れる水の入水温度が低
いときにはトータルの流水量を制御すると同時にバイパ
ス管路へ流れる水のバイパス比率を低く押さえ、給水管
を流れる水の入水温度が高くなるにつれてトータルの流
水量を増加させると同時にそのバイパス比率も増大させ
るようにする。そうすれば、たとえば給水管を流れる水
の入水温度が低い冬場に設定温度が高いような場合に熱
交換器の出口側の出湯温度が高くなりすぎて沸騰した
り、また逆に給水管を流れる水の入水温度が高い夏場に
設定温度が低いようなことがあっても熱交換器にドレン
が発生するような事態が回避され、夏場・冬場を問わず
安定した燃焼状態が得られる。In practice, when the incoming temperature of the water flowing through the water supply pipe is low, the total flow rate is controlled and at the same time the bypass ratio of the water flowing to the bypass pipe is kept low. At the same time as increasing the total water flow, the bypass ratio is also increased. In that case, for example, when the temperature of incoming water flowing through the water supply pipe is low in winter and the set temperature is high, the outlet water temperature at the outlet side of the heat exchanger becomes too high, and the water flows through the water supply pipe. Even if the set temperature is low in summer when the temperature of incoming water is high, a situation in which drainage occurs in the heat exchanger is avoided, and a stable combustion state is obtained regardless of summer or winter.
【００２１】また本発明の２番目は、上述のガス給湯器
に用いられるバイパスミキシング用水温感応型定流量弁
に係り、その要旨とするところは、給水管を流れる水を
熱交換器へ導く主路と、その水の一部を前記熱交換器を
介さずに直接バイパス管路へ導く副路とを備え、前記給
水管を流れる水の温度に応じてトータルの流水量を規制
すると同時に前記バイパス管路へ流れる水のバイパス比
率を可変制御する水温感応手段が設けられていることに
ある。The second aspect of the present invention relates to a water temperature responsive type constant flow valve for bypass mixing used in the above-described gas water heater. The gist of the second aspect is to mainly introduce water flowing through a water supply pipe to a heat exchanger. And a sub-path for guiding a part of the water directly to the bypass pipe without passing through the heat exchanger. The bypass controls the total flow amount according to the temperature of the water flowing through the water supply pipe, and simultaneously performs the bypass. Water temperature sensing means for variably controlling the bypass ratio of water flowing to the pipeline is provided.
【００２２】この２番目の発明に係るバイパスミキシン
グ用水温感応型定流量弁によれば、給水管を流れる水の
入水温度に応じて主路より熱交換器へ導かれる水と副路
よりバイパス管路へ導かれるトータルの流水量、及びそ
のトータルの流水量に対するバイパス管路へ導かれる流
水量の比率、すなわちバイパス比率が水温感応手段によ
って規制制御される。According to the bypass-mixing water temperature-responsive constant flow valve according to the second aspect of the invention, the water introduced from the main path to the heat exchanger and the bypass pipe formed from the sub-path correspond to the incoming temperature of the water flowing through the water supply pipe. The total amount of flowing water guided to the path and the ratio of the amount of flowing water to the bypass pipe to the total amount of flowing water, that is, the bypass ratio, is regulated and controlled by the water temperature sensing means.
【００２３】この場合前記水温感応手段は、前記流水の
温度が低いときにはトータルの流水量を制御すると同時
に前記バイパス比率を低減させ、前記流水の温度が高く
なるにつれてトータルの流水量を増加させると同時に前
記バイパス比率も増大させる水温感応性部材により構成
されていること。これには水温変化に応じてバネ荷重
（バネ常数）が変わるタイプの形状記憶合金バネなどが
好適なものとして挙げられる。In this case, the water temperature responsive means controls the total amount of flowing water when the temperature of the flowing water is low, reduces the bypass ratio at the same time, and increases the total amount of flowing water as the temperature of the flowing water increases. It is configured by a water temperature sensitive member that also increases the bypass ratio. A suitable example is a shape memory alloy spring of a type in which a spring load (spring constant) changes according to a change in water temperature.
【００２４】[0024]
【発明の実施の形態】以下、本発明の好適な実施の形態
を図面を参照して詳細に説明する。図１は、本発明が適
用されるバイパスミキシング方式のガス給湯器の概略構
成を示したものである。図示されるガス給湯器１０は給
水管を流れる水が熱交換器へ送られてガスバーナにより
加熱され出湯管へ送り出される本給水系のほかに、その
給水管を流れる水の一部は熱交換器を通らずに直接出湯
管へ送り込むバイパス給水系とを備え、熱交換器を経て
加熱された湯をバイパス給水系を経て送り込まれる水に
よって薄め、設定温度にして出湯させるタイプのもので
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 shows a schematic configuration of a bypass mixing type gas water heater to which the present invention is applied. The illustrated gas water heater 10 has a water supply system in which water flowing through a water supply pipe is sent to a heat exchanger, heated by a gas burner, and sent out to a hot water supply pipe. A bypass water supply system that feeds the hot water directly to the tapping pipe without passing through the hot water pipe. The hot water heated through the heat exchanger is diluted with water sent through the bypass water supply system, and the hot water is discharged at a set temperature.
【００２５】このガス給湯器１０の具体的構成をさらに
詳しく説明すれば、初めに本給水系は給水管１２と出湯
管１４とが熱交換器１６を介して継がれ、この熱交換器
１６がケーシング（内胴）１８内に配設されると共に、
このケーシング１８内にはさらに前記熱交換器１６をら
流れる水を加熱するためのガスバーナ２０がその熱交換
器１６の下方部位に配設されている。The specific configuration of the gas water heater 10 will be described in more detail. First, in the present water supply system, a water supply pipe 12 and a tapping pipe 14 are connected via a heat exchanger 16, and the heat exchanger 16 While being disposed in the casing (inner body) 18,
A gas burner 20 for heating the water flowing through the heat exchanger 16 is provided in the casing 18 at a lower portion of the heat exchanger 16.
【００２６】そして前記給水管１２には水の流れを検知
する水流スイッチ２２のほかその給水管１２を流れる水
の温度（Ｔ1 ）を検知する入水温サーミスタ２４が設け
られ、また前記出湯管１４の前記熱交換器１６の出口側
に位置する部位にはその熱交換器１６の出口側の出湯温
度（Ｔ2 ）を検知するための出湯温（Ｔ2 ）サーミスタ
２６が設けられている。The water supply pipe 12 is provided with a water flow switch 22 for detecting the flow of water and an inlet water temperature thermistor 24 for detecting the temperature (T 1 ) of water flowing through the water supply pipe 12. A hot water temperature (T 2 ) thermistor 26 for detecting the hot water temperature (T 2 ) at the outlet side of the heat exchanger 16 is provided at a portion located on the outlet side of the heat exchanger 16.
【００２７】また前記ガスバーナ２０のガス管２８には
元電磁弁３０、メイン電磁弁３２及びそのガス管２８を
流れるガスの流量を制御するガス比例弁３４がそれぞれ
設けられ、さらに前記ガスバーナ２０に燃焼用空気を供
給するための送風ファン３６が設けられている。The gas pipe 28 of the gas burner 20 is provided with a main solenoid valve 30, a main solenoid valve 32, and a gas proportional valve 34 for controlling the flow rate of gas flowing through the gas pipe 28. A blower fan 36 for supplying air for use is provided.
【００２８】次にバイパス給水系について説明すると、
前記給水管１２と出湯管１４との間にはその給水管１２
を流れる水を熱交換器１６を通らずに出湯管１４へ直接
導くバイパス管路３８が設けられ、このバイパス管路３
８にはその管路を開閉するバイパス電磁弁４０が設けら
れている。Next, the bypass water supply system will be described.
A water supply pipe 12 is provided between the water supply pipe 12 and the tapping pipe 14.
A bypass pipe 38 is provided to directly guide the water flowing through the hot water pipe 16 to the tapping pipe 14 without passing through the heat exchanger 16.
8 is provided with a bypass solenoid valve 40 for opening and closing the pipeline.
【００２９】そしてこれに関連して前記出湯管１４の下
流側部位には、前記熱交換器１６を経て出湯管１４へ導
かれた湯（出湯温度Ｔ2 ）と前記バイパス管路３８を経
て出湯管１４へ導かれた水（入水温度Ｔ1 ）とが混合
（ミキシング）された後の出湯水の温度（Ｔ3 ）を検知
する出湯温（Ｔ3 ）サーミスタ４２が設けられている。In connection with this, the hot water (hot water temperature T 2 ) led to the hot water pipe 14 via the heat exchanger 16 and the hot water via the bypass pipe 38 are located downstream of the hot water pipe 14. A tap water temperature (T 3 ) thermistor 42 for detecting the temperature (T 3 ) of tap water after the water (input water temperature T 1 ) guided to the pipe 14 is mixed (mixed) is provided.
【００３０】かくして本発明では、前記給水管１２の前
記バイパス管路４０との分岐点の部位に位置して水ガバ
ナ（定流量弁）４４が設けられている。図２はこの水ガ
バナ４４の内部構造を拡大して示している。図示される
ようにこの水ガバナ４４は、給水管１２の本管よりガバ
ナ本体４４の流入口へ導入された水を前記熱交換器１６
に通じる本給水系に導く流水路（これを「主路」と称す
る）のほかに、その水の一部をバイパス管路３８に導く
流水路（これを「副路」と称する）が形成されている。Thus, in the present invention, a water governor (constant flow rate valve) 44 is provided at a location of a branch point of the water supply pipe 12 with the bypass pipe 40. FIG. 2 shows the internal structure of the water governor 44 in an enlarged manner. As shown in the figure, the water governor 44 transfers the water introduced from the main pipe of the water supply pipe 12 to the inflow port of the governor body 44 through the heat exchanger 16.
In addition to a flowing water channel (referred to as a "main route") leading to the main water supply system leading to the water supply system, a flowing water channel (referred to as a "sub-channel") for guiding a part of the water to a bypass pipe 38 is formed. ing.
【００３１】これを具体的に説明すると、ガバナ本体４
６内が隔壁４８により大きく２つに仕切られており、一
方の隔壁空間にはカップ状の固定弁体５０がその内壁面
にシール部材５２，５２を介して密着された状態で、か
つ移動不能に設けられている。また前記固定弁体５０の
内側には可動弁体５４がやはりシール部材５６を介して
固定弁体５０の内壁面に密着された状態で可動自在に、
かつ可動弁体５４と前記固定弁体５０の内壁面に設けら
れる弁座５８との間の流水間隙ｇ1 が可変なるように設
けられている。To explain this more specifically, the governor body 4
6 is largely divided into two by a partition wall 48, and a fixed valve body 50 in the shape of a cup is in close contact with the inner wall surface of one of the partition walls via seal members 52, 52, and cannot be moved. It is provided in. Also, a movable valve element 54 is movable inside the fixed valve element 50 in a state in which the movable valve element 54 is also in close contact with the inner wall surface of the fixed valve element 50 via a seal member 56.
And is provided so as flowing water gap g 1 between the valve seat 58 provided on the inner wall surface of the stationary valve member 50 and the movable valve member 54 is variable.
【００３２】そして前記固定弁体５０の内底面と可動弁
体５４の頭頂部との間には該ガバナ本体４６内に導かれ
る水の圧力に抗して前記流水間隙ｇ1 を押し広げる方向
に前記可動弁体５４を押圧付勢するコイルバネ部材６０
が介設されている。尚、前記可動弁体５４は前記固定弁
体５０の下端内壁面に設けられるストッパリング６０に
より不用意に抜脱されないようになっている。[0032] Then in a direction pushing the running water gap g 1 against the pressure of the water introduced into the said governor body 46 between the top portion of the inner bottom surface and the movable valve member 54 of the stationary valve member 50 Coil spring member 60 for urging the movable valve element 54
Is interposed. The movable valve element 54 is prevented from being accidentally pulled out by a stopper ring 60 provided on the inner wall surface at the lower end of the fixed valve element 50.
【００３３】一方、このガバナ本体４６の前記隔壁４８
により仕切られる他方の隔壁空間には、弁軸６４がシー
ル部材６６を介してその内壁面に擢動自在に設けられ、
該弁軸６６の一端には前記給水管１２の本管より流入さ
れる水の流量を変えるための流量可変ニードル６８が前
記隔壁空間内に設けられる弁座７０との間の流水間隙ｇ
2 が可変なるように設けられている。また前記弁軸６４
の他端には前記バイパス管路３８へ導かれる水の流量を
変えるためのバイパス率可変ニードル７２がやはりしの
隔壁空間の内壁面に設けられ．段部（弁座）７４との間
の流水間隙ｇ3が可変なるように設けられている。On the other hand, the partition wall 48 of the governor body 46
A valve shaft 64 is movably provided on the inner wall surface of the other partition space partitioned by the sealing member 66 via a sealing member 66.
At one end of the valve shaft 66, a variable flow rate needle 68 for changing the flow rate of water flowing from the main pipe of the water supply pipe 12 is provided.
2 is provided so as to be variable. The valve shaft 64
At the other end, there is provided a bypass ratio variable needle 72 for changing the flow rate of water guided to the bypass conduit 38 on the inner wall surface of the partition wall space. It stepped portions running water gap g 3 between the (valve seat) 74 is provided so as variable becomes.
【００３４】かくして前記弁軸６４には前記流量可変ニ
ードル６８と弁座７０との間の流水間隙ｇ2 を押し広
げ、かつ前記バイパス率可変ニードル７２と弁座７２と
の流水間隙ｇ3 をも押し広げる方向に付勢された形状記
憶合金バネ７６が介設されており、また該形状記憶合金
バネ７６の付勢力に抗して前記流量可変ニードル６８と
弁座７０との間の流水間隙ｇ2 、及び前記バイパス率可
変ニードル７２と弁座７４との間を流水間隙ｇ3 を押し
狭める方向に付勢されたバイアスバネ７８が併せて介設
されている。[0034] Thus in the valve shaft 64 push the running water gap g 2 between the variable flow rate needle 68 and the valve seat 70, and also the running water gap g 3 between the bypass ratio variable needle 72 and the valve seat 72 A shape memory alloy spring 76 urged in the direction of expanding is interposed, and a flowing water gap g between the variable flow rate needle 68 and the valve seat 70 against the urging force of the shape memory alloy spring 76. 2, and bias spring 78 which is biased in a direction to narrow down the running water gap g 3 is together is interposed between the bypass ratio variable needle 72 and the valve seat 74.
【００３５】前記形状記憶合金バネ７６は、そのバネ特
性が水温が高くなるにつれてバネ荷重が増大し、水温が
低くなるにつれてバネ荷重も減少する、いわゆる双方向
性の形状記憶特性を有する材料が用いられている。The shape memory alloy spring 76 is made of a material having a so-called bidirectional shape memory characteristic in which the spring load increases as the water temperature increases and the spring load decreases as the water temperature decreases. Have been.
【００３６】一方、前記隔壁４８及び固定弁体５０の壁
面には前記流量可変ニードル６８と弁座７０との間の流
水間隙ｇ2 を通る水が前記固定弁体５０の内部空間へ導
かれるようにそれぞれ連通孔８０，８２が設けられ、ま
た該固定弁体５０の壁面には該固定弁体５０内に導かれ
た水を前記熱交換器１６へ向けて送り出すための開口８
０が設けられている。さらにまた前記隔壁４８には該固
定弁体５０の開口８４より外へ送り出された水の一部を
前記バイパス率可変ニードル７２と弁座７４との間の流
水間隙ｇ3 を通ってバイパス管路３８へ送り出されるよ
うに連通孔８６が設けられている。On the other hand, the wall surface of the partition wall 48 and the stationary valve member 50 so that water passing through the water flow gap g 2 between the variable flow rate needle 68 and the valve seat 70 is led into the inner space of the stationary valve member 50 The fixed valve body 50 has openings 8 through which water introduced into the fixed valve body 50 is sent out toward the heat exchanger 16.
0 is provided. Furthermore bypass conduit through a running water gap g 3 between the bypass ratio variable needle 72 and the valve seat 74 a part of the water fed to the outside from the opening 84 of the stationary valve member 50 in the partition wall 48 A communication hole 86 is provided so as to be sent out to the hole 38.
【００３７】尚、図１に戻ってこのガス給湯器１０の構
成の残り部分について説明すると、このガス給湯器１０
においてその運転を制御するバーナコントローラ８８に
は、その入力側には水流スイッチ２２、入水温（Ｔ1 ）
サーミスタ２４、出湯温（Ｔ2 、Ｔ3 ）サーミスタ２
６、４２などの信号が入力され、またバーナコントロー
ラ８８の出力側にはガスバーナ２０のガス比例弁３４、
送風ファン３６のファンモータ、バイパス管路３８に設
けられるバイパス電磁弁４０などが接続されている。ま
たこのバーナコントローラ８８にはリモコン９０が接続
されており、このリモコンの操作により出湯温度の設定
などができるようになっている。図中、９２は給湯栓を
示す。Returning to FIG. 1, the rest of the configuration of the gas water heater 10 will be described.
In the burner controller 88 for controlling the operation, a water flow switch 22 is provided on the input side, and the incoming water temperature (T 1 )
Thermistor 24, tap water temperature (T 2 , T 3 ) thermistor 2
6, 42, etc., and a gas proportional valve 34 of the gas burner 20 is provided on the output side of the burner controller 88.
The fan motor of the blower fan 36, the bypass solenoid valve 40 provided in the bypass conduit 38, and the like are connected. A remote controller 90 is connected to the burner controller 88 so that the tapping temperature can be set by operating the remote controller. In the figure, 92 indicates a hot water tap.
【００３８】かくしてこのように構成されたガス給湯器
１０では例えばリモコンの操作により設定温度（ＴS ）
が４５℃以下（３８℃以上）の場合には、給湯栓９２を
開くことによって水流スイッチ２２がオンし、その信号
をバーナコントローラ８８で受信して送風ファン３６の
ファン駆動回路（図示せず）へ指令が送られることによ
り送風ファン３６が駆動し、ガスバーナ２０へ燃焼用空
気が供給される。またバーナコントローラ８８からの指
令によりガスバーナ２０の元電磁弁３０、メイン電磁弁
３２、ガス比例弁３４が順次開かれて燃焼ガスがガスバ
ーナ２０へ供給され、次いでイグナイタによる点火動作
によってガスバーナ２０が点火される。In the gas water heater 10 thus configured, the set temperature (T S ) is operated by operating the remote controller, for example.
When the temperature is 45 ° C. or lower (38 ° C. or higher), the water flow switch 22 is turned on by opening the hot water tap 92, the signal is received by the burner controller 88, and a fan drive circuit (not shown) of the blower fan 36. Is blown, the blowing fan 36 is driven, and the combustion air is supplied to the gas burner 20. In accordance with a command from the burner controller 88, the main solenoid valve 30, the main solenoid valve 32, and the gas proportional valve 34 of the gas burner 20 are sequentially opened to supply combustion gas to the gas burner 20, and then the gas burner 20 is ignited by an igniter. You.
【００３９】それと同時にバーナコントローラ８８から
の指令によりバイパス管路３８のバイパス電磁弁４０が
開かれ、その結果給水管１２を流れる水は熱交換器１６
へ通じる本給水系バイパス管路３８との両方へ流れるこ
とになる。そしてこのガスバーナ２０の点火初期動作段
階では、給水管１２を流れる水の温度がその給水管１２
に設けられる入水温（Ｔ1 ）サーミスタ２４からの検知
信号により把握され、バーナコントローラ８８によって
出湯管１４を流れる湯の出湯温度が設定温度（ＴS ）に
近づくようにガスバーナ２０へ供給するガス量を調整す
るガス比例弁３４の開度が調整される。At the same time, the bypass solenoid valve 40 of the bypass line 38 is opened by a command from the burner controller 88, so that the water flowing through the water supply pipe 12 is
To the water supply bypass line 38 leading to the main water supply system. In the initial operation stage of ignition of the gas burner 20, the temperature of the water flowing through the water supply pipe 12 is changed to the temperature of the water supply pipe 12.
To be grasped by the detection signal from the incoming water temperature (T 1) thermistor 24 provided, the amount of gas supplied to the burner 20 as hot water temperature of the hot water flowing through the hot water pipe 14 by the burner controller 88 approaches the set temperature (T S) The opening of the gas proportional valve 34 to be adjusted is adjusted.
【００４０】そしてガスバーナ２０の燃焼が安定状態に
なった以降は、出湯管１４に設けられる出湯温（Ｔ3 ）
サーミスタ４２からの信号を受けてバーナコントローラ
８８ではガス比例弁３４の比例弁電流回路と送風ファン
３６のファン駆動回路とへ信号を送り、そのガス比例弁
３４の開度と送風ファン３６のファン回転数との比例制
御を司ることによって出湯温度が設定温度に維持される
ように運転の管理がなされるものである。After the combustion of the gas burner 20 becomes stable, the tapping temperature (T 3 ) provided in the tapping pipe 14 is obtained.
In response to the signal from the thermistor 42, the burner controller 88 sends signals to the proportional valve current circuit of the gas proportional valve 34 and the fan drive circuit of the blower fan 36, and the opening of the gas proportional valve 34 and the fan rotation of the blower fan 36. The operation is controlled so that the tapping temperature is maintained at the set temperature by controlling the proportionality with the number.
【００４１】このような運転状態において本発明のガス
給湯器１０並びに水ガバナ（定流量弁）４４によれば、
給湯栓９２が開かれたときに給水管１２より水ガバナ４
４に導入された水はガバナ本体４６内に設けられる流量
可変ニードル６８と弁座７０との流水間隙ｇ2 を通って
さらに隔壁４８及び固定弁体５０に形成される連通孔８
０，８２を通過し、固定弁体５０の内部空間へ導かれ
る。According to the gas water heater 10 and the water governor (constant flow valve) 44 of the present invention in such an operating state,
When the hot water tap 92 is opened, the water governor 4 is
The water introduced into the 4 communication holes 8 formed further partition wall 48 and the stationary valve member 50 through the running water gap g 2 between the flow rate variable needle 68 and the valve seat 70 provided in the governor body 46
0, 82, and is guided to the internal space of the fixed valve body 50.
【００４２】そして固定弁体５０内へ導かれた水は可動
弁体５４と弁座５８との間の流水間隙ｇ1 を通り、さら
に固定弁体５０の開口８４を通ってその一部は熱交換器
１６へ通じる本給湯系へ導かれ、残りの水は隔壁４８に
形成される連通孔８６を通ってさらにバイパス率可変ニ
ードル７２と弁座７４との間の流水間隙ｇ3 を通過して
バイパス管路３８へ送り出される。[0042] and led to the stationary valve member 50 within the water passes through the water flow gap g 1 between the movable valve body 54 and the valve seat 58, the part further through the openings 84 of the stationary valve body 50 heat The remaining water is guided to the main hot water supply system leading to the exchanger 16, passes through a communication hole 86 formed in the partition wall 48, and further passes through a flowing water gap g 3 between the bypass ratio variable needle 72 and the valve seat 74. It is sent to the bypass line 38.
【００４３】そのときに前記水ガバナ４４内を流れる水
の温度によって該水ガバナ４４内の形状記憶合金バネ７
６のバネ荷重（バネ常数）が決定され、こ形状記憶合金
バネ７６のバネ荷重が水温によって変わることにより前
記流量可変ニードル６８と弁座７０との間の流水間隙ｇ
2 が変更され、これに伴って可動弁体５４と弁座５８と
の間の流水間隙ｇ1 も変更され、これらの相重的作動に
より該水ガバナ４４を流れるトータルの流水量（Ｑ0 ）
が規制される。また前記流量可変ニードル６８と弁座７
０との間の流水間隙ｇ2 が変更されることに伴い、バイ
パス率可変ニードル７２と弁座７４との間の流水間隙ｇ
3 も同時に変更決定され、これによりバイパス管路３８
へ導かれる流水量８（Ｑ2 ）が決定される。At this time, the shape memory alloy spring 7 in the water governor 44 depends on the temperature of the water flowing in the water governor 44.
6 is determined, and the spring load of the shape memory alloy spring 76 changes according to the water temperature, so that the flow gap g between the variable flow rate needle 68 and the valve seat 70 is determined.
2 is changed, flowing water the total amount of flowing water governor 44 running water gap g 1 is also changed by the phases heavy actuation between the movable valve body 54 and the valve seat 58 along with this (Q 0)
Is regulated. The variable flow rate needle 68 and the valve seat 7
0, the flow gap g 2 between the bypass ratio variable needle 72 and the valve seat 74 is changed.
3 is also changed at the same time, whereby the bypass line 38 is changed.
8 (Q 2 ) is determined.
【００４４】その場合に前記水ガバナ４４に流入する水
の温度が低いときには前記形状記憶合金バネ７６のバネ
荷重も小さいために前記流量可変ニード６８と弁座７０
との間の流水間隙ｇ2 は小さくなり、その結果給水管１
２を流れるトータルの水の流量（Ｑ0 ）が少な目に規制
され、同時にバイパス率可変ニードル２２と弁座７４と
の間の流水間隙ｇ3 も小さくなりトータルの流水量（Ｑ
0 ）に対するバイパス管路３８へ導かれる水の流量（Ｑ
2 ）、すなわちバイパス比率もある設計された条件範囲
で小さくなる。In this case, when the temperature of the water flowing into the water governor 44 is low, the spring load of the shape memory alloy spring 76 is small, so that the variable flow need 68 and the valve seat 70
And the flow gap g 2 between the two
2, the flow rate (Q 0 ) of the total water flowing through the flow path 2 is regulated to a small value, and at the same time, the flow gap g 3 between the variable bypass ratio needle 22 and the valve seat 74 becomes small, and the total flow rate (Q
0 ) to the bypass line 38 (Q)
2 ) That is, the bypass ratio also becomes smaller in a certain designed condition range.
【００４５】また逆に前記水ガバナ４４に流入する水の
温度が高いときには前記形状記憶合金バネ７６のバネ荷
重も大きくなるために前記流量可変ニードル６８と弁座
７０との間の流水間隙ｇ2 は大きくなり、その結果給水
管１２を流れる水の量が多目となり、さらにバイパス率
可変ニード２２と弁座７４との間の流水間隙ｇ3 も大き
くなりトータルの流水量（Ｑ0 ）に対するバイパス管路
３８へ導かれる水の流量（Ｑ2 ）、すなわちバイパス比
率もある設計された条件範囲で大きくなる。Conversely, when the temperature of the water flowing into the water governor 44 is high, the spring load of the shape memory alloy spring 76 also increases, so that the flow gap g 2 between the variable flow rate needle 68 and the valve seat 70 As a result, the amount of water flowing through the water supply pipe 12 becomes large, and the flow gap g 3 between the variable bypass ratio need 22 and the valve seat 74 also becomes large, so that the bypass for the total flow amount (Q 0 ) is reduced. The flow rate (Q 2 ) of the water guided to the conduit 38, that is, the bypass ratio, also increases in a certain designed condition range.
【００４６】この場合に前記バイパス比率、すなわち前
記給水管１２を流れるトータルの流水量（Ｑ0 ）に対す
るバイパス管路３８へ送り出される流水量（Ｑ2 ）は前
記流量可変ニードル６８と弁座７０との流水間隙ｇ2 、
及びバイパス率可変ニードル７２と弁座７４との流水間
隙ｇ3 が弁軸６４の移動量によってどのように変わるの
かは設計に依存し、さらに前記形状記憶合金バネ７６の
バネ特性を選択することにより決定される。例えばある
バネ特性を有する形状記憶合金バネを採用したとする
と、本実施例では次の表１に示したような条件が得られ
るように設計されている。In this case, the bypass ratio, that is, the flow rate (Q 2 ) sent out to the bypass pipe 38 with respect to the total flow rate (Q 0 ) flowing through the water supply pipe 12 is determined by the flow rate variable needle 68 and the valve seat 70. Running water gap g 2 ,
And by flowing water gap g 3 between the bypass ratio variable needle 72 and the valve seat 74 depending on the design is whether change how the amount of movement of the valve shaft 64, to further select spring characteristics of the shape memory alloy spring 76 It is determined. For example, assuming that a shape memory alloy spring having a certain spring characteristic is employed, the present embodiment is designed so as to obtain the conditions shown in Table 1 below.
【００４７】[0047]
【表１】 [Table 1]
【００４８】この表１について説明すると、ある種のガ
ス給湯器において、給水管１２を流れる水の入水温度
（Ｔ1 ）に対して該水カバナ４４を通過するトータルの
流水量（Ｑ0 ）は、Ｑ0 ＝４００／（６０−入水温度）
の式により定められている。ここに「４００」はガスバ
ーナ２０の最大火力時の熱出力値（ｋｃａｌ／分）であ
り「６０」は熱交換器１６による上限加熱温度を示して
いる。Referring to Table 1, in a certain type of gas water heater, the total amount of flowing water (Q 0 ) passing through the water governor 44 with respect to the incoming temperature (T 1 ) of the water flowing through the water supply pipe 12 is as follows. , Q 0 = 400 / (60- incoming water temperature)
It is determined by the following equation. Here, “400” is the heat output value (kcal / min) of the gas burner 20 at the time of the maximum heating power, and “60” indicates the upper limit heating temperature by the heat exchanger 16.
【００４９】これに対して従来のもの（ガス給湯器）
は、そのバイパス比率Ｑ2 ／Ｑ0 ×１００（％）を「４
９％」に定めているが、本発明によれば、表に示される
ように、そのバイパス比率が入水温度（Ｔ1 ）が低いと
ころでは低い範囲で、また入水温度（Ｔ1 ）が高くなる
につれてそのバイパス比率も高い範囲で定められてい
る。On the other hand, a conventional one (gas water heater)
Sets the bypass ratio Q 2 / Q 0 × 100 (%) to “4
However, according to the present invention, as shown in the table, the bypass ratio is in a low range where the incoming water temperature (T 1 ) is low, and the incoming water temperature (T 1 ) is high. Accordingly, the bypass ratio is determined in a high range.
【００５０】これを次の図３に示したグラフで説明する
と、横軸にバイパス率（％）を採り、縦軸に熱交換器１
６の出口側の出湯温度（Ｔ2 ）を採ったものであるが、
例えば給水管１２を流れる水の入水温度（Ｔ1 ）が５℃
のとき、表１に示したようにバイパス比率（％）を２３
〜４９％の範囲で選択すれば、最低でも熱交換器１６の
出口側の出湯温度（Ｔ2 ）を４８℃以上に維持でき、ま
た最高でも８５℃を越えることはない。Referring to the graph shown in FIG. 3, the horizontal axis indicates the bypass ratio (%), and the vertical axis indicates the heat exchanger 1.
The tap water temperature (T 2 ) at the outlet side of No. 6 was taken.
For example, the incoming temperature (T 1 ) of the water flowing through the water supply pipe 12 is 5 ° C.
At this time, as shown in Table 1, the bypass ratio (%) is 23
If selected in the range of to 49%, can be maintained even the outlet side of the hot water temperature of the heat exchanger 16 (T 2) above 48 ° C. At a minimum, also not exceed 85 ° C. at most.
【００５１】同様のことは入水温度１０℃、１５℃、２
５℃、３０℃のいずれかの場合にも言えることであり、
それぞれの入水温度に対して表１に示したような適正な
範囲のバイパス比率（％）が確保されておれば、熱交換
器１６の出口側の出湯温度（Ｔ2 ）は常に４８℃〜８５
℃の範囲に保たれることになる。The same applies to the water inlet temperatures of 10 ° C., 15 ° C., and 2 ° C.
It can be said that either of 5 ° C or 30 ° C,
If an appropriate range of bypass ratio (%) as shown in Table 1 is secured for each incoming water temperature, the outlet temperature (T 2 ) at the outlet side of the heat exchanger 16 is always 48 ° C. to 85 ° C.
° C.
【００５２】このように前記給水管１２を流れる水の入
水温度（Ｔ1 ）に応じて水ガバナ４４に設けられる形状
記憶合金バネ７６のバネ荷重が変わり、給水管１２を流
れるトータルの流水量（Ｑ0 ）に対するバイパス管路３
８へ送られる流水量（Ｑ2 ）のバイパス比率（％）を変
化させる構造としているので、ストレートに出湯させる
時や入水温度（Ｔ1 ）が低い時に熱交換器１６が沸騰し
ないことはもとより、入水温度（Ｔ1 ）が高いときにも
ケーシング（内胴）の出口側の出湯温度（Ｔ2）が４８
℃以上に保たれ、計算上熱交換器１６にドレンが発生す
る４５．５℃まで下がることはない。As described above, the spring load of the shape memory alloy spring 76 provided in the water governor 44 changes according to the incoming temperature (T 1 ) of the water flowing through the water supply pipe 12, and the total amount of water flowing through the water supply pipe 12 ( Bypass line 3 for Q 0 )
Since the structure is such that the bypass ratio (%) of the amount of flowing water (Q 2 ) sent to 8 is changed, not only does the heat exchanger 16 not boil when tapping straight water or when the incoming water temperature (T 1 ) is low, but also Even when the incoming water temperature (T 1 ) is high, the outlet temperature (T 2 ) of the outlet side of the casing (inner body) is 48
C. or more, and does not drop to 45.5 ° C. where drainage occurs in the heat exchanger 16 in calculation.
【００５３】尚、このガス給湯器１０では、リモコン操
作により設定温度（ＴS ）が４６℃以上（７５℃まで）
の場合には、バイパス管路３８のバイパス電磁弁４０に
はバーナコントローラ８８から指令が与えられないので
開かず、したがって給水管１２を流れる水は全量熱交換
器１６へ導かれガスバーナ２０により加熱されて書体の
出湯温度（設定温度）での出湯が行われる。この運転動
作については、本発明には直接関係ないのでこの程度の
説明にとどめる。In the gas water heater 10, the set temperature (T S ) is set to 46 ° C. or more (up to 75 ° C.) by remote control operation.
In the case of (1), the bypass solenoid valve 40 of the bypass line 38 is not opened because no command is given from the burner controller 88. Therefore, the entire amount of water flowing through the water supply pipe 12 is guided to the heat exchanger 16 and is heated by the gas burner 20. Tapping is performed at the tapping temperature (set temperature) of the typeface. Since this driving operation is not directly related to the present invention, it will be described only to this extent.
【００５４】本発明は上記した実施の形態に何ら限定さ
れるものではなく、本発明の趣旨を逸脱しない範囲で種
々の改変が可能である。例えば上記実施例ではバイパス
比率を変えるのに形状記憶合金バネを用いているが、こ
れに代わるものとしてサーモワックスを用いたり、ある
いはその他の代用技術を駆使するものであっても同様の
目的は達成される。The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, a shape memory alloy spring is used to change the bypass ratio, but the same object can be achieved by using a thermo wax as an alternative to this, or by using other alternative techniques. Is done.
【００５５】[0055]
【発明の効果】本発明に係るバイパスミキシング方式の
ガス給湯器によれば、ガバナ機能による水圧変動の自動
制御が行われることはもとより、給水管を流れる水の流
水温度に応じてトータルの流水量に対するバイパス管路
へ流れる水のバイパス比率を変えることができるように
したものであるから、流水温度が低いときに熱交換器の
出口側の出湯温度が上がり過ぎて沸騰したりすることが
回避されるばかりか、流水温度が高い時熱交換器による
水の加熱が抑えられてその結果熱交換器にドレンが発生
するような事態が回避とれ、良好な運転状態が安定的に
維持されるものである。According to the gas water heater of the bypass mixing type according to the present invention, not only the automatic control of the water pressure fluctuation by the governor function is performed, but also the total amount of flowing water according to the temperature of the flowing water flowing through the water supply pipe. It is possible to change the bypass ratio of the water flowing to the bypass pipe with respect to the temperature, so that when the temperature of the flowing water is low, the outlet temperature of the outlet side of the heat exchanger can be prevented from rising excessively and boiling. In addition, when the temperature of the flowing water is high, the heating of the water by the heat exchanger is suppressed, and as a result, a situation in which drainage occurs in the heat exchanger can be avoided, and a good operating condition can be stably maintained. is there.
【図１】本発明の一実施の形態に係るバイパスミキシン
グ方式のガス給湯器の概略構成図である。FIG. 1 is a schematic configuration diagram of a gas water heater of a bypass mixing type according to an embodiment of the present invention.
【図２】図１に示したガス給湯器における水ガバナ（定
流量弁）の拡大断面図である。FIG. 2 is an enlarged sectional view of a water governor (constant flow valve) in the gas water heater shown in FIG.
【図３】このガス給湯器におけるバスパス比率と熱交換
器の出口温度との関係を示したグラフである。FIG. 3 is a graph showing a relationship between a bus pass ratio and an outlet temperature of a heat exchanger in the gas water heater.
【図４】従来一般に知られているこの種のバイパスミキ
シン方式ガス給温器の概略構成図である。FIG. 4 is a schematic configuration diagram of this type of bypass mixing gas heater generally known in the art.
１０ バイパスミキシング方式ガスの給湯器 １２ 給水管 １４ 出湯管 １６ 熱交換器 ２０ ガスバーナ ３８ バイパス管路 ４４ 水ガバナ ６８ 流量可変ニードル ７２ バイパス率可変ニードル ７６ 形状記憶合金バネ 10 Bypass mixing gas water heater 12 water pipe 14 Hot water pipe 16 heat exchanger 20 Gas burner 38 Bypass line 44 Water governor 68 Flow rate variable needle 72 Bypass rate variable needle 76 Shape Memory Alloy Spring
フロントページの続き (56)参考文献 特開 平３−247954（ＪＰ，Ａ) 特開 平５−296564（ＪＰ，Ａ) 特開 平２−163577（ＪＰ，Ａ) 特開 昭63−303281（ＪＰ，Ａ) 実開 昭62−192043（ＪＰ，Ｕ) 実開 昭59−103157（ＪＰ，Ｕ) 実開 昭57−119246（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) F24H 1/10 302 F24D 17/00 Continuation of the front page (56) References JP-A-3-247954 (JP, A) JP-A-5-296564 (JP, A) JP-A-2-163577 (JP, A) JP-A-63-303281 (JP) , A) Japanese Utility Model Showa 62-192043 (JP, U) Japanese Utility Model Showa 59-103157 (JP, U) Japanese Utility Model Showa 57-119246 (JP, U) (58) Fields surveyed (Int. Cl. 7 , DB Name) F24H 1/10 302 F24D 17/00
Claims (4)
と、該熱交換器を加熱するガスバーナとを備えるガス給
湯器において、前記給水管と出湯管との間には前記給水
管を流れる水を前記熱交換器を介さずに直接出湯管へ導
くバイパス管路を備えると共に、前記給水管の前記バイ
パス管路との分岐部に前記給水管を流れる水の温度に応
じて前記給水管から前記バイパス管路へ流れる水のバイ
パス比率を変える水温感応型定流量弁を備えていること
を特徴とするバイパスミキシング方式のガス給湯器。1. A gas water heater comprising a heat exchanger provided with a water supply pipe and a tapping pipe, and a gas burner for heating the heat exchanger, wherein the water supply pipe is provided between the water supply pipe and the tapping pipe. The water flowing through the water supply pipe at a branch point of the water supply pipe with the bypass pipe, the water being supplied to the water supply pipe at a branch point of the water supply pipe with the bypass pipe. A bypass mixing type gas water heater comprising a water temperature-responsive constant flow valve for changing a bypass ratio of water flowing from a pipe to the bypass conduit.
を流れる水の温度が低いときにはトータルの流水量を制
御すると同時に前記バイパス比率を低減させ、前記給水
管を流れる水の温度が高くなるにつれてトータルの流水
量を増加させると同時に前記バイパス比率も増大させる
水温感応特性を備えることを特徴とする請求項１に記載
したバイパスミキシング方式のガス給湯器。2. The water temperature-responsive constant flow valve controls the total flow rate when the temperature of the water flowing through the water supply pipe is low, reduces the bypass ratio at the same time, and increases the temperature of the water flowing through the water supply pipe. 2. The gas water heater of claim 1, wherein the gas water heater has a water temperature responsive characteristic that increases the total amount of flowing water and increases the bypass ratio as much as possible.
と、その水の一部を前記熱交換器を介さずに直接バイパ
ス管路へ導く副路とを備え、前記給水管を流れる水の温
度に応じてトータルの流水量を規制すると同時に前記バ
イパス管路へ流れる水のバイパス比率を可変制御する水
温感応手段が設けられていることを特徴とするバイパス
ミキシング用水温感応型定流量弁。3. A main path for guiding water flowing through a water supply pipe to a heat exchanger, and a sub path for guiding a part of the water directly to a bypass pipe without passing through the heat exchanger. A water temperature-sensitive constant flow rate for bypass mixing, wherein a water temperature-sensitive means is provided for regulating a total amount of flowing water according to a temperature of flowing water and variably controlling a bypass ratio of water flowing to the bypass pipe. valve.
低いときにはトータルの流水量を制御すると同時に前記
バイパス比率を低減させ、前記流水の温度が高くなるに
つれてトータルの流水量を増加させると同時に前記バイ
パス比率も増大させる水温感応性部材により構成されて
いることを特徴とする請求項３に記載したバイパスミキ
シング用水温感応型定流量弁。4. The water temperature responsive means controls the total amount of flowing water when the temperature of the flowing water is low, reduces the bypass ratio at the same time, and increases the total amount of flowing water as the temperature of the flowing water increases. 4. The water temperature-sensitive constant flow valve for bypass mixing according to claim 3, comprising a water temperature-sensitive member that also increases the bypass ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05375096A JP3539046B2 (en) | 1996-02-16 | 1996-02-16 | Gas water heater of bypass mixing type and water temperature sensitive type constant flow valve for bypass mixing used therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05375096A JP3539046B2 (en) | 1996-02-16 | 1996-02-16 | Gas water heater of bypass mixing type and water temperature sensitive type constant flow valve for bypass mixing used therein |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09222263A JPH09222263A (en) | 1997-08-26 |
| JP3539046B2 true JP3539046B2 (en) | 2004-06-14 |
Family
ID=12951496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP05375096A Expired - Lifetime JP3539046B2 (en) | 1996-02-16 | 1996-02-16 | Gas water heater of bypass mixing type and water temperature sensitive type constant flow valve for bypass mixing used therein |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3539046B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106766227A (en) * | 2017-02-14 | 2017-05-31 | 广东万家乐燃气具有限公司 | A kind of water heater intelligent constant-temperature circulating device |
| CN113701343A (en) * | 2021-08-04 | 2021-11-26 | 广东超人节能厨卫电器有限公司 | Water heater capable of mixing and preheating |
-
1996
- 1996-02-16 JP JP05375096A patent/JP3539046B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09222263A (en) | 1997-08-26 |
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