JP2000329405A - Hot water supply machine - Google Patents
Hot water supply machineInfo
- Publication number
- JP2000329405A JP2000329405A JP11136774A JP13677499A JP2000329405A JP 2000329405 A JP2000329405 A JP 2000329405A JP 11136774 A JP11136774 A JP 11136774A JP 13677499 A JP13677499 A JP 13677499A JP 2000329405 A JP2000329405 A JP 2000329405A
- Authority
- JP
- Japan
- Prior art keywords
- hot water
- pipe
- heat exchanger
- bypass
- bypass 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.)
- Pending
Links
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は給湯停止後の後沸
きを緩和して再給湯開始時の湯温のオーバーシュートを
防止するため、入水管から分岐し熱交換器をバイパスし
て出湯管に合流するバイパス管を設けた給湯機に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention branches from an inlet pipe and bypasses a heat exchanger to a hot water pipe in order to alleviate post-boil after hot water supply is stopped and to prevent overshoot of hot water temperature at the start of re-hot water supply. The present invention relates to a water heater provided with a merging bypass pipe.
【０００２】[0002]
【従来の技術】従来よりこの種のものに於いては、例え
ば特許第２６７７８８４号公報に開示されているが如
く、熱交換器をバイパスするバイパス管に常閉の電磁弁
を設け、給湯停止から一定時間経過後に電磁弁を開弁し
て後沸きを緩和し、そして給湯栓が開放されて熱要求が
発生すると電磁弁を開弁したまま給湯を開始して、その
後バイパス管の電磁弁を閉弁して再給湯時の湯温のオー
バーシュートを防止しようとしたものであった。2. Description of the Related Art Conventionally, as disclosed in Japanese Patent No. 2,677,884, a normally closed solenoid valve is provided in a bypass pipe for bypassing a heat exchanger, and this type of apparatus is used for stopping hot water supply. After a certain period of time, the solenoid valve is opened to alleviate post-boiling, and when a hot water tap is opened and heat is required, hot water supply is started with the solenoid valve open, and then the solenoid valve in the bypass pipe is closed. The valve was tried to prevent overshoot of the hot water temperature at the time of re-water supply.
【０００３】又、同様に再給湯時のオーバーシュートを
防止しようとするものでは、例えば特公平７−１０７４
６２号公報に開示されているが如く、給湯停止前の燃焼
量と給湯停止からの経過時間により後沸き量を演算し、
再給湯時にこの後沸き量が一定以上である場合にバイパ
ス管の電磁弁を一定時間だけ開弁するものがあった。[0003] Similarly, in an attempt to prevent overshoot at the time of hot water supply, for example, Japanese Patent Publication No. 7-1074
As disclosed in Japanese Patent No. 62, the amount of post-boiling is calculated based on the amount of combustion before the stop of hot water supply and the elapsed time since the stop of hot water supply,
In some cases, when the amount of boiling water is more than a certain value at the time of hot water supply, the solenoid valve of the bypass pipe is opened for a certain time.
【０００４】又、例えば特開平５−２０３２６２号公報
に開示されているが如く、熱交換器上流の入水管に流量
センサを設け、この流量センサが給湯による流水を検知
したらバイパス管の電磁弁を開弁し、開弁から一定時間
経過後に出湯管に設けた湯温センサで検知する湯温が所
定温度より低下していたらバイパス管の電磁弁を閉弁し
て、再給湯時のオーバーシュートを防止しようとしたも
のがあった。Further, as disclosed in, for example, Japanese Patent Application Laid-Open No. 5-203262, a flow rate sensor is provided in an inlet pipe upstream of a heat exchanger, and when the flow rate sensor detects flowing water due to hot water supply, a solenoid valve of a bypass pipe is turned on. When the hot water temperature detected by the hot water temperature sensor provided on the tapping pipe has dropped below a predetermined temperature after a certain period of time from opening the valve, the solenoid valve of the bypass pipe is closed to overshoot when re-hot water is supplied. There was something we tried to prevent.
【０００５】[0005]
【発明が解決しようとする課題】このように、再給湯時
にバイパス管の電磁弁を開弁してバイパス管からの低温
水を後沸きによって高温となった熱交換器内の高温水と
混合して湯温のオーバーシュートを防止しようとするも
のは数多くあるが、いずれも少量出湯時に対する配慮が
何等されていないものであった。As described above, when the hot water is supplied again, the solenoid valve of the bypass pipe is opened, and the low-temperature water from the bypass pipe is mixed with the high-temperature water in the heat exchanger that has become hot due to the post-boiling. There have been many attempts to prevent overshoot of hot water temperature, but none of them have taken any consideration when tapping a small amount of hot water.
【０００６】即ち、少量出湯時にはバイパス管の電磁弁
を開弁しておいても、電磁弁自体の流通抵抗が大きくて
入水管からバイパス管を通過して出湯管に合流するはず
の低温水がほとんど流通せず、入水管からの水のほとん
どは熱交換器を流通してしまうため再出湯時のオーバー
シュートを防止するための機構がほとんど機能せず、図
５の二点鎖線で示すように湯温がオーバーシュートして
しまい高温の湯が流出してしまうと言う欠点があった。That is, even when the solenoid valve of the bypass pipe is opened at the time of tapping a small amount of hot water, low-temperature water that is supposed to flow from the inlet pipe through the bypass pipe to join the tap pipe even if the solenoid valve of the bypass pipe is opened is large. It hardly circulates, and most of the water from the inlet pipe circulates through the heat exchanger, so that the mechanism for preventing overshoot at the time of re-hot water hardly functions, as shown by the two-dot chain line in FIG. There is a drawback that the hot water overshoots and hot water flows out.
【０００７】[0007]
【課題を解決するための手段】この発明はこの点に着目
し上記欠点を解決する為、請求項１では特にその構成
を、入水管と、該入水管の下流に設けた熱交換器と、該
熱交換器の下流に設けた出湯管と、前記入水管から分岐
され前記熱交換器をバイパスして前記出湯管に合流する
バイパス管と、該バイパス管途中に設けたバイパス弁
と、前記熱交換器を介して水を加熱するバーナとを備
え、再給湯時に前記バイパス弁を開弁するようにした給
湯機に於いて、前記バイパス管の分岐点より熱交換器側
の入水管に、或いは前記バイパス管の合流点より熱交換
器側の出湯管に、少量出湯時には流通抵抗が増加され更
に多量出湯時には流通抵抗が少量出湯時より軽減される
流通抵抗増減手段を設けたものとした。SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, the present invention focuses on this point. In the first aspect of the present invention, the structure is particularly characterized by an inlet pipe and a heat exchanger provided downstream of the inlet pipe. A tapping pipe provided downstream of the heat exchanger, a bypass pipe branched from the inlet pipe and bypassing the heat exchanger and joining the tapping pipe, a bypass valve provided in the middle of the bypass pipe, And a burner for heating water via an exchanger, wherein the bypass valve is opened at the time of re-water supply, in a water inlet pipe on a heat exchanger side from a branch point of the bypass pipe, or The tapping pipe on the heat exchanger side from the junction of the bypass pipe is provided with a flow resistance increasing / decreasing means for increasing the flow resistance when a small amount of hot water is discharged and further reducing the flow resistance when a large amount of hot water is discharged.
【０００８】又、請求項２では上記請求項１のものにお
いて、前記流通抵抗増減手段を、閉弁状態で流通可能な
流通孔を有するシート弁としたものである。According to a second aspect of the present invention, in the first aspect, the flow resistance increasing / decreasing means is a seat valve having a flow hole that can flow in a closed state.
【０００９】[0009]
【発明の実施の形態】給湯を一旦停止して再給湯開始す
るときに後沸きによる湯温のオーバーシュートを防止す
るためバイパス管５のバイパス弁６を開弁するようにし
た給湯機に於いて、再給湯が少量であったときは流通抵
抗増減手段１４で流通抵抗が増加されるので、熱交換器
１側に流通する水を制限しバイパス管５側の低温水の流
量を確保して湯温のオーバーシュートを防止でき、一
方、多量の再給湯であったときは流通抵抗増減手段１４
で流通抵抗が軽減されるので、余分な低温水をバイパス
管５から引き込むことがない。BEST MODE FOR CARRYING OUT THE INVENTION In a water heater in which a bypass valve 6 of a bypass pipe 5 is opened in order to prevent a hot water temperature overshoot due to a post-boil when a hot water supply is temporarily stopped and re-hot water supply is started. When the amount of hot water is small, the flow resistance is increased by the flow resistance increasing / decreasing means 14, so that the flow of water to the heat exchanger 1 is restricted, and the flow rate of low-temperature water in the bypass pipe 5 is secured. The overshoot of the temperature can be prevented. On the other hand, when a large amount of hot water is supplied,
As a result, the flow resistance is reduced, so that extra low-temperature water is not drawn in from the bypass pipe 5.
【００１０】好適な流通抵抗増減手段１４として、閉弁
状態で流通可能な流通孔２１を有し、流量に応じて自動
的に開閉されるシート弁１９を用いることによって、流
量に応じて流通抵抗を変更するため非常に安価に少量出
湯時の湯温のオーバーシュートを防止できる。As a preferred flow resistance increasing / decreasing means 14, a flow valve 21 which has a flow hole 21 which can flow in a closed state and is automatically opened and closed according to the flow rate is used. Therefore, it is possible to prevent the overshoot of the hot water temperature when tapping a small amount of water at a very low price.
【００１１】[0011]
【実施例】次に、この発明に係る給湯機を図面に示され
た一実施例をもとに説明する。１はフィンアンドチュー
ブ式の熱交換器で、該熱交換器１の上流側には水道管と
接続されている入水管２を備え、又、下流側には給湯栓
３を終端に有した出湯管４を備えている。Next, a water heater according to the present invention will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a fin-and-tube heat exchanger having a water inlet pipe 2 connected to a water pipe on the upstream side of the heat exchanger 1 and a hot water tap having a hot water tap 3 at a downstream end. A tube 4 is provided.
【００１２】５は入水管２から分岐され熱交換器１をバ
イパスして出湯管４に接続されたバイパス管で、該バイ
パス管５途中には常閉の電磁弁よりなるバイパス弁６を
備えている。Reference numeral 5 denotes a bypass pipe branched from the water inlet pipe 2 and connected to the hot water pipe 4 while bypassing the heat exchanger 1. The bypass pipe 5 is provided with a bypass valve 6 comprising a normally closed solenoid valve in the middle of the bypass pipe 5. I have.
【００１３】７は入水管２のバイパス管５の分岐点より
も熱交換器１側に設けられた流量センサで、熱交換器１
内へ流入する水の流量Ｑを検知するものであり、８は出
湯管４のバイパス管５の合流点よりも熱交換器１側に設
けられた湯温センサで、熱交換器１から流出する湯の温
度ＴＨを検知するものである。Reference numeral 7 denotes a flow sensor provided on the heat exchanger 1 side of the water inlet pipe 2 from the branch point of the bypass pipe 5.
A hot water temperature sensor 8 is provided on the heat exchanger 1 side of the junction of the bypass pipe 5 of the tapping pipe 4 and flows out of the heat exchanger 1. which detects the temperature T H of the hot water.
【００１４】９は熱交換器１を介して水を加熱するバー
ナで、その加熱量は所望の給湯温度Ｔを設定する温度設
定手段１０と前記流量センサ７と前記湯温センサ８の信
号を入力として、給湯設定温度Ｔと湯温センサ８の検知
する湯温ＴＨが一致するようにマイコンより構成される
制御器１１で制御されるものである。Reference numeral 9 denotes a burner for heating water through the heat exchanger 1. The amount of heating is input by signals from the temperature setting means 10 for setting a desired hot water supply temperature T, the flow rate sensor 7 and the hot water temperature sensor 8. as, in which the hot water temperature T H for detecting the hot water set temperature T and the hot water temperature sensor 8 is controlled by the controller 11 composed of a microcomputer to match.
【００１５】１２は給湯停止した後に熱交換器１の残熱
により熱交換器１内の湯が給湯設定温度Ｔ以上に加熱さ
れてしまう後沸き現象を緩和するための開弁制御手段
で、給湯停止により流量センサ７が最低作動流量Ｑ
０（ここでは２l/min）以下を検知してバーナ９をＯＦ
Ｆした後に、湯温センサ８の検知する湯温ＴＨと給湯設
定温度Ｔの偏差が第１の所定値α（ここでは＋３℃）以
上になったら、前記バイパス弁６を開弁し再給湯時に熱
交換器１内の湯をバイパス管５からの冷水と混合して給
湯栓３から給湯して加熱開始時のオーバーシュートを防
止するものである。尚、この開弁制御手段１２は前記制
御器１１内に一つの機能として組み込まれているもので
ある。Numeral 12 denotes valve opening control means for alleviating the after-boiling phenomenon in which the hot water in the heat exchanger 1 is heated to a temperature higher than the hot water supply set temperature T by the residual heat of the heat exchanger 1 after the hot water supply is stopped. When the flow sensor 7 stops, the minimum operating flow Q
0 (here 2 l / min) is detected and the burner 9 is turned off.
After F, When hot water temperature detection for the hot water temperature T H and the hot water supply of the sensor 8 set temperature T difference is the first predetermined value alpha (here + 3 ° C.) above since, by opening the bypass valve 6 again hot water Sometimes, the hot water in the heat exchanger 1 is mixed with the cold water from the bypass pipe 5 and supplied from the hot water tap 3 to prevent overshoot at the start of heating. The valve opening control means 12 is incorporated in the controller 11 as one function.
【００１６】この開弁制御手段１２により後沸きの状態
に応じてバイパス弁６の開閉を簡易に制御でき、後沸き
があって再給湯時にオーバーシュートする心配のあると
きには確実にバイパス弁６を開弁しておきオーバーシュ
ートを防止し、又、後沸きのほとんどないときにはバイ
パス弁６は閉弁状態のままであるので再給湯時に過剰な
アンダーシュートを引き起こす心配のないものである。The opening and closing of the bypass valve 6 can be easily controlled by the valve opening control means 12 in accordance with the state of post-boiling. The overshoot is prevented by opening the valve, and when there is almost no after-boil, the bypass valve 6 remains closed, so that there is no fear of causing an excessive undershoot at the time of re-heating.
【００１７】１３は再給湯時に前記開弁制御手段１２で
開弁されたバイパス弁６を適確なタイミングで閉弁して
湯温のオーバーシュートとアンダーシュートを防止する
閉弁制御手段で、給湯再開により流量センサ７が最低作
動流量Ｑ０以上を検知してバーナ９をＯＮすると同時
に、一定時間ｔ１（ここでは５秒間）をカウントし、該
一定時間ｔ１が経過した後に湯温センサ８の検知する湯
温ＴＨと給湯設定温度Ｔの偏差が第２の所定値β（ここ
では＋１３℃）以下になったら、遅延時間ｔ２（ここで
は０．５秒間）の後に前記バイパス弁６を閉弁するもの
である。尚、この閉弁制御手段１３は前記開弁制御手段
１２と同様に前記制御器１１内に一つの機能として組み
込まれているものである。Numeral 13 denotes valve closing control means for closing the bypass valve 6 opened by the valve opening control means 12 at an appropriate timing when hot water is supplied again to prevent overshoot and undershoot of hot water temperature. Upon restart, the flow sensor 7 detects the minimum operating flow rate Q 0 or more and turns on the burner 9, and at the same time, counts a certain time t 1 (here, 5 seconds), and after a lapse of the certain time t 1 , the hot water temperature sensor 8 sensing for When deviations hot water temperature T H and the hot water set temperature T is the second predetermined value beta (here + 13 ° C.) falls below, the delay time t 2 said bypass valve (here 0.5 second) after the 6 Is closed. The valve closing control means 13 is incorporated in the controller 11 as one function similarly to the valve opening control means 12.
【００１８】この閉弁制御手段１３により、湯温ＴＨと
給湯設定温度Ｔとの偏差が第２の所定値β以下であるか
どうかを判定する前に、一定時間ｔ１が経過するまで待
機することにより、湯温判定をオーバーシュートの温度
降下側で必ず行うことができ誤動作の心配がなく、遅延
時間ｔ２をカウントしてからバイパス弁６を閉弁するの
で、湯温センサ８で検知した湯温ＴＨと同程度にオーバ
ーシュートした湯は遅延時間ｔ２の間に熱交換器１内か
ら出湯管４へ流出し、熱交換器１内の湯をバイパス管５
からの冷水と混合して給湯するもので、又、遅延時間ｔ
２の間は湯温センサ８は給湯設定温度Ｔより高い温度を
検知しているので加熱量は小さく抑えられてバイパス弁
６の閉弁後に再びオーバーシュートする心配もないもの
である。The wait This closing control means 13, before the deviation between the hot water temperature T H and the hot water set temperature T is to determine whether it is less than the second predetermined value beta, a predetermined time t 1 has elapsed by always there is no fear of possible malfunctions be carried out at a temperature drop side of the overshoot water temperature determination, since closing the bypass valve 6 by counting the delay time t 2, detected by the hot water temperature sensor 8 was the hot water temperature T H and hot water overshoots the same extent flows into hot water pipe 4 from the heat exchanger 1 during the delay time t 2, the bypass pipe 5 the hot water in the heat exchanger 1
Hot water mixed with cold water from
During the period 2 , since the hot water temperature sensor 8 detects a temperature higher than the hot water supply set temperature T, the amount of heating is suppressed to a small value, and there is no fear of overshoot again after the bypass valve 6 is closed.
【００１９】１４は少量出湯時に流通抵抗が増加され、
逆に多量出湯時に流通抵抗が軽減される流通抵抗増減手
段で、出湯管４途中のバイパス管５との合流点より熱交
換器１側に設けられており、詳細構造を図２及び図３に
示す好適な実施例で説明すると、管継手１５内の縮小部
１６と拡開部１７との間の絞り部１８にシート弁１９を
設けたものであり、該シート弁１９はシリコンゴム等の
弾性材製で、図４に示すように円中心に向かって設けら
れた複数の切り込み２０と、円中心に開けられた流通孔
２１を有しているものである。In the case of a small amount of hot water, the flow resistance is increased.
Conversely, a flow resistance increasing / decreasing means for reducing the flow resistance when tapping a large amount of hot water is provided on the heat exchanger 1 side from the junction with the bypass pipe 5 in the middle of the hot water pipe 4, and the detailed structure is shown in FIGS. In the preferred embodiment shown in the drawings, a seat valve 19 is provided in a throttle portion 18 between a contraction portion 16 and an expansion portion 17 in a pipe joint 15, and the seat valve 19 is made of an elastic material such as silicone rubber. As shown in FIG. 4, it is made of a material and has a plurality of cuts 20 provided toward the center of the circle and a flow hole 21 opened at the center of the circle.
【００２０】ここで、再給湯開始されたが手洗い等で３
l/min程度の少量出湯であった場合、シート弁１９はそ
の弾性力により略閉弁状態を保って流通抵抗を増加し、
熱交換器１からの後沸きによる高温水は流通孔２１を通
過する分が流出し、又、バイパス管５側はシート弁１９
により増加した流通抵抗の分だけ相対的に流れやすくな
って、オーバーシュートを防止するのに十分な低温水を
混合して出湯することができ、このとき給湯栓での湯温
は図５の実線で示すように湯温変動の少ない安定したも
のとなる。At this point, the re-water supply was started, but the
In the case of a small amount of hot water of about l / min, the seat valve 19 maintains a substantially closed state by its elastic force to increase the flow resistance,
The high-temperature water generated by the post-boiling from the heat exchanger 1 flows out through the flow holes 21, and the bypass pipe 5 has a seat valve 19.
As a result, it becomes relatively easy to flow by the increased flow resistance, and it is possible to mix the low-temperature water sufficient to prevent overshoot and to tap the hot water. At this time, the hot water temperature at the hot-water tap is indicated by the solid line in FIG. As shown by, the water temperature becomes stable with little fluctuation.
【００２１】一方、再給湯がシャワー等で１２l/min程
度の多量出湯であった場合は、シート弁１９は切り込み
２０により流れの下流に向かって開弁するので流通抵抗
は軽減されバイパス管５から余分な低温水を引き込むこ
ともなく従来と同様にオーバーシュート及びアンダーシ
ュートを防止できるものである。On the other hand, when the hot water is supplied in a large amount of about 12 l / min by a shower or the like, since the seat valve 19 is opened toward the downstream of the flow by the cut 20, the flow resistance is reduced and the flow through the bypass pipe 5 is reduced. It is possible to prevent overshoot and undershoot as in the related art without drawing in excessive low-temperature water.
【００２２】尚、この発明はこの一実施例に限定される
ものではなく、流通抵抗増減手段１４を熱交換器１とバ
イパス管５の分岐点の間の入水管２に設けても同一の効
果が得れれることは勿論、バイパス弁６を開弁するため
の検知量は従来例に示したように種々のものが採用可能
であるほか、バイパス弁６は開閉制御のみならず開度を
制御するものでも少量出湯時には同一の効果が得られる
ものである。The present invention is not limited to this embodiment, and the same effect can be obtained even if the flow resistance increasing / decreasing means 14 is provided in the water inlet pipe 2 between the heat exchanger 1 and the branch point of the bypass pipe 5. As a matter of course, the amount of detection for opening the bypass valve 6 can be various as shown in the conventional example, and the bypass valve 6 controls not only the opening / closing control but also the opening degree. Even when a small amount of hot water is supplied, the same effect can be obtained.
【００２３】次に、図６に示す流通抵抗増減手段１４の
別の実施例を説明すると、コイルバネ等の付勢手段２２
により流れと逆方向に付勢された弁体２３に絞り流路２
４を設けて流通抵抗増減手段１４を構成しており、少量
出湯時は流れの力よりも付勢手段２２の付勢力が強く略
閉弁して流通抵抗を増加させ、一方、多量出湯時には流
れの力の方が付勢力よりも勝るので弁体２３は下流側へ
移動され流通路２５を開放して流通抵抗を軽減する。こ
れにより少量出湯時のバイパス管５の流量を確保してオ
ーバーシュートを防止するものである。Next, another embodiment of the flow resistance increasing / decreasing means 14 shown in FIG. 6 will be described.
Throttle valve 2 is urged in the direction opposite to the flow by
4 is provided to constitute the flow resistance increasing / decreasing means 14. When a small amount of hot water is supplied, the urging force of the urging means 22 is stronger than the flow force and the valve closes substantially to increase the flow resistance. Is stronger than the urging force, the valve element 23 is moved downstream to open the flow passage 25 and reduce the flow resistance. Thus, the flow rate of the bypass pipe 5 when a small amount of hot water is supplied is secured to prevent overshoot.
【００２４】次に、図７に示す流通抵抗増減手段１４の
更に別の実施例を説明すると、バイパス管５の合流点よ
りも熱交換器１側の出湯管４に常閉の電磁弁２６と、該
電磁弁２６をバイパスし且つ出湯管４より細径で流通抵
抗の大きいバイパス流路２７により流通抵抗増減手段１
４を構成しており、少量出湯時は電磁弁２６を閉弁して
バイパス流路２７のみを流通させることで流通抵抗を増
加させ、一方、多量出湯時には流量センサ７が最低作動
流量Ｑ０より大きい所定流量を検知すると電磁弁２６を
開弁して流通抵抗を軽減する。これにより少量出湯時の
バイパス管５の流量を確保してオーバーシュートを防止
するものである。Next, another embodiment of the flow resistance increasing / decreasing means 14 shown in FIG. 7 will be described. A normally closed solenoid valve 26 is connected to the tapping pipe 4 on the heat exchanger 1 side from the junction of the bypass pipe 5. The bypass flow passage 27 bypasses the solenoid valve 26 and has a smaller diameter than the tapping pipe 4 and a larger flow resistance.
4 constitutes a small amount tapping time increases the flow resistance by circulating only bypass flow passage 27 and closes the solenoid valve 26, whereas, the flow rate sensor 7 at the time of a large amount pouring is above the minimum operating flow rate Q 0 When a large predetermined flow rate is detected, the solenoid valve 26 is opened to reduce the flow resistance. Thus, the flow rate of the bypass pipe 5 when a small amount of hot water is supplied is secured to prevent overshoot.
【００２５】[0025]
【発明の効果】以上のように、この発明によれば、少量
出湯時は熱交換器側の流通抵抗を増加してバイパス管側
に低温水の必要流量を確保して湯温のオーバーシュート
を防止すると共に、多量出湯時には熱交換器側の流通抵
抗を軽減して余分な低温水をバイパス管から引き込むこ
とがないものである。As described above, according to the present invention, when tapping a small amount of hot water, the flow resistance on the heat exchanger side is increased, and the required flow rate of low-temperature water is ensured on the bypass pipe side, and the overshoot of hot water temperature is reduced. In addition to this, when a large amount of hot water is discharged, the flow resistance on the heat exchanger side is reduced so that extra low-temperature water is not drawn from the bypass pipe.
【００２６】又、シート弁を用いることにより流量に応
じて流通抵抗を変更してくれるので、非常に安価に少量
出湯時の湯温のオーバーシュートを防止できるものであ
る。Further, since the flow resistance is changed in accordance with the flow rate by using the seat valve, it is possible to prevent the overshoot of the hot water temperature when a small amount of hot water is supplied at a very low cost.
【図１】この発明の一実施例の概略構成図。FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.
【図２】同一実施例の少量出湯時の作動を示す図。FIG. 2 is a diagram showing an operation at the time of tapping a small amount of hot water in the same embodiment.
【図３】同一実施例の多量出湯時の作動を示す図。FIG. 3 is a diagram showing the operation of the same embodiment when a large amount of hot water is discharged.
【図４】流通抵抗増減手段としてのシート弁の正面図。FIG. 4 is a front view of a seat valve as a flow resistance increasing / decreasing means.
【図５】同一実施例による少量再出湯時の湯温変動を示
す図。FIG. 5 is a diagram showing a change in hot water temperature when a small amount of hot water is re-discharged according to the same embodiment.
【図６】この発明の流通抵抗増減手段の別の実施例。FIG. 6 shows another embodiment of the flow resistance increasing / decreasing means of the present invention.
【図７】この発明の流通抵抗増減手段の更に別の実施
例。FIG. 7 shows still another embodiment of the flow resistance increasing / decreasing means of the present invention.
１ 熱交換器 ２ 入水管 ４ 出湯管 ５ バイパス管 ６ バイパス弁 ９ バーナ １４ 流通抵抗増減手段 １９ シート弁 ２１ 流通孔 REFERENCE SIGNS LIST 1 heat exchanger 2 inlet pipe 4 tapping pipe 5 bypass pipe 6 bypass valve 9 burner 14 flow resistance increasing / decreasing means 19 seat valve 21 flow hole
Claims (2)
換器と、該熱交換器の下流に設けた出湯管と、前記入水
管から分岐され前記熱交換器をバイパスして前記出湯管
に合流するバイパス管と、該バイパス管途中に設けたバ
イパス弁と、前記熱交換器を介して水を加熱するバーナ
とを備え、再給湯時に前記バイパス弁を開弁するように
した給湯機に於いて、前記バイパス管の分岐点より熱交
換器側の入水管に、或いは前記バイパス管の合流点より
熱交換器側の出湯管に、少量出湯時には流通抵抗が増加
され更に多量出湯時には流通抵抗が少量出湯時より軽減
される流通抵抗増減手段を設けたことを特徴とする給湯
機。A water inlet pipe, a heat exchanger provided downstream of the water inlet pipe, a hot water pipe provided downstream of the heat exchanger, and a water branch branched from the water inlet pipe and bypassing the heat exchanger. Hot water supply comprising a bypass pipe that joins a tapping pipe, a bypass valve provided in the middle of the bypass pipe, and a burner that heats water through the heat exchanger, and opens the bypass valve when hot water is supplied again. In the machine, the flow resistance is increased when a small amount of hot water is supplied to the inlet pipe on the heat exchanger side from the junction of the bypass pipe, or to the hot water pipe on the heat exchanger side from the junction of the bypass pipe. A hot-water supply device comprising a flow resistance increasing / decreasing means for reducing the flow resistance from when tapping a small amount of hot water.
通可能な流通孔を有するシート弁としたことを特徴とす
る請求項１記載の給湯機。2. The water heater according to claim 1, wherein the flow resistance increasing / decreasing means is a seat valve having a flow hole that can flow in a closed state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11136774A JP2000329405A (en) | 1999-05-18 | 1999-05-18 | Hot water supply machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11136774A JP2000329405A (en) | 1999-05-18 | 1999-05-18 | Hot water supply machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000329405A true JP2000329405A (en) | 2000-11-30 |
Family
ID=15183213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11136774A Pending JP2000329405A (en) | 1999-05-18 | 1999-05-18 | Hot water supply machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000329405A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678944A (en) * | 2016-12-12 | 2017-05-17 | 威能（中国）供热制冷环境技术有限公司 | Water circulation module and water heating system adopting water circulation module |
| CN114484884A (en) * | 2022-01-26 | 2022-05-13 | 广东万和新电气股份有限公司 | Control method, device and control equipment for gas water heater system capable of heating |
-
1999
- 1999-05-18 JP JP11136774A patent/JP2000329405A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678944A (en) * | 2016-12-12 | 2017-05-17 | 威能（中国）供热制冷环境技术有限公司 | Water circulation module and water heating system adopting water circulation module |
| CN106678944B (en) * | 2016-12-12 | 2019-10-22 | 威能（中国）供热制冷环境技术有限公司 | Water loop module and the hot-water heating system for using the water loop module |
| CN114484884A (en) * | 2022-01-26 | 2022-05-13 | 广东万和新电气股份有限公司 | Control method, device and control equipment for gas water heater system capable of heating |
| CN114484884B (en) * | 2022-01-26 | 2024-06-11 | 广东万和新电气股份有限公司 | Control method, device and control equipment of heatable gas water heater system |
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