JP2678330B2 - Bypass mixing type water heater - Google Patents
Bypass mixing type water heaterInfo
- Publication number
- JP2678330B2 JP2678330B2 JP4156968A JP15696892A JP2678330B2 JP 2678330 B2 JP2678330 B2 JP 2678330B2 JP 4156968 A JP4156968 A JP 4156968A JP 15696892 A JP15696892 A JP 15696892A JP 2678330 B2 JP2678330 B2 JP 2678330B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- heat exchanger
- hot water
- water passage
- bypass circuit
- 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 233
- 230000005484 gravity Effects 0.000 claims description 7
- 230000010354 integration Effects 0.000 claims description 5
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009835 boiling Methods 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は給湯器、特にバイパスミ
キシング方式の給湯器に関するもので、出湯停止直後の
再出湯時に蛇口から冷水が一時的に流出する不都合を防
止するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater, and more particularly to a bypass mixing type water heater, which prevents the inconvenience of temporary outflow of cold water from the faucet at the time of re-hot water supply immediately after the hot water supply is stopped.
【０００２】[0002]
【従来技術及び課題】出湯停止直後の再出湯時に一時的
に熱湯が流出する後沸き現象や冷水が流出する所謂冷水
サンド現象を防止して所望温度の温水を直ちに取出せる
ようにしたバイパスミキシング方式の給湯器は概略図４
に示す構造を有する。通水路(1) にはガスバーナ(6) の
発生熱を吸収する吸熱フィン(20)を具備する熱交換器
(2）と、給湯温センサ(21)と更に蛇口(22)がこの順序で
順次下流側に配設されていると共に、該通水路(1) に於
ける熱交換器(2）の上流側と下流側はバイパス回路(3）
で繋がれている。2. Description of the Related Art By-pass mixing method capable of immediately taking out hot water of a desired temperature by preventing a boil-off phenomenon in which hot water temporarily flows out and a so-called cold water sand phenomenon in which cold water flows out at the time of re-melting immediately after the hot water is stopped Schematic of the water heater
Has the structure shown in FIG. A heat exchanger equipped with heat absorption fins (20) for absorbing the heat generated by the gas burner (6) in the water passage (1).
(2), hot water supply temperature sensor (21) and further faucet (22) are arranged in this order in the downstream side, and the upstream side of the heat exchanger (2) in the water passage (1). And the bypass circuit on the downstream side (3)
Are connected by
【０００３】上記バイパス回路(3）と通水路(1) の分岐
点(32)には、熱交換器(2）とバイパス回路(3）への供給
水の分配比率をコントロールする分配器(4) が挿入され
ており、該分配器(4) の動作は給湯温センサ(21)や湯温
設定器(41)の出力を判断する制御回路(5）で制御される
ようになっている。このものでは、蛇口(22)を開放して
出湯操作をすると、このときに生じる通水路(1) 内の水
流を図示しない水流スイッチが検知してガスバーナ(6)
が燃焼せしめられ、これにより、高温水（一般的には給
水温より５５deg 程度高温の温水）が熱交換器(2）部分
で沸かされて給湯動作が開始する。At the branch point (32) between the bypass circuit (3) and the water passage (1), a distributor (4) for controlling the distribution ratio of the feed water to the heat exchanger (2) and the bypass circuit (3). ) Is inserted, and the operation of the distributor (4) is controlled by the control circuit (5) that determines the output of the hot water temperature sensor (21) and the hot water temperature setting device (41). In this case, when the tap (22) is opened and hot water is discharged, a water flow switch (not shown) detects the water flow in the water passage (1) at this time and the gas burner (6)
Is burned, whereby high-temperature water (generally, hot water having a temperature about 55 deg higher than the supply water temperature) is boiled in the heat exchanger (2) portion to start the hot water supply operation.
【０００４】熱交換器(2）で加熱生成された高温水とバ
イパス回路(3）からの冷水が混合された温水がその下流
側の給湯温センサ(21)の部分まで流れると、該給湯温セ
ンサ(21)の検知温度と湯温設定器(41)の設定温度を制御
回路(5）が判断し、該制御回路(5）は、上記給湯温セン
サ(21)の検知温度が湯温設定器(41)の設定温度に等しく
なるように分配器(4) を制御しながら熱交換器(2）とバ
イパス回路(3）への供給水の分配比率を調整する。即
ち、熱交換器(2）の下流側の通水路(1) とパイパス回路
(3）との合流点(31)に供給する該バイパス回路(3）から
の冷水と前記熱交換器(2）からの高温水の混合割合いを
調整し、これにより、給湯温センサ(21)が検知する出湯
温度を湯温設定器(41)の設定温度に等しくするのであ
る。When hot water, which is a mixture of high-temperature water generated in the heat exchanger (2) and cold water from the bypass circuit (3), flows to the hot water supply temperature sensor (21) on the downstream side, the hot water temperature The control circuit (5) determines the temperature detected by the sensor (21) and the set temperature of the hot water temperature setting device (41), and the control circuit (5) sets the hot water temperature sensor (21) to detect the hot water temperature. The distribution ratio of the feed water to the heat exchanger (2) and the bypass circuit (3) is adjusted while controlling the distributor (4) so that it becomes equal to the set temperature of the device (41). That is, the water passage (1) on the downstream side of the heat exchanger (2) and the bypass circuit.
By adjusting the mixing ratio of the cold water from the bypass circuit (3) supplied to the confluence point (31) with the hot water (2) from the heat exchanger (2), the hot water temperature sensor (21) The hot water temperature detected by) is made equal to the set temperature of the hot water temperature setting device (41).
【０００５】このものでは、蛇口(22)を閉じた出湯停止
時に所謂後沸き現象が生じて熱交換器(2）部分の通水路
(1) 内に熱湯が滞留することがあっても、再出湯時には
上記後沸き現象による熱湯にバイパス回路(3）から供給
される冷水が混合せしめられるから、該後沸き現象によ
る高温水がそのまま蛇口(22)から流出する不都合が防止
できる。又、再出湯時のガスバーナ(6) の燃焼開始まで
に熱交換器(2）内に侵入して加熱されない冷水の量を抑
える事ができて、所謂冷水サンド現象が防止されるた
め、冷水が蛇口(22)から流出する不都合が防止できる。In this case, a so-called post-boiling phenomenon occurs when hot water is stopped with the faucet (22) closed, and a water passage in the heat exchanger (2) part
(1) Even if hot water may stay inside, hot water due to the post-boiling phenomenon is mixed with cold water supplied from the bypass circuit (3) at the time of re-hot water, so that the hot water due to the post-boiling phenomenon remains as it is. It is possible to prevent the inconvenience from flowing out from the faucet (22). In addition, the amount of cold water that does not enter the heat exchanger (2) and is not heated before the start of combustion of the gas burner (6) at the time of re-hot water can be suppressed, and the so-called cold water sand phenomenon is prevented, so It is possible to prevent the inconvenience from flowing out from the faucet (22).
【０００６】しかしながら、上記従来のものでは、出湯
停止直後に再出湯操作をすると蛇口(22)から上記冷水サ
ンドとは別の理由に基づく冷水が流出するという問題が
ある。かかる問題が生じるのは、出湯停止時にバイパス
回路(3）内の冷水が上記合流点(31)から熱交換器(2）側
に向けて逆流することがその原因となっている。However, the above-mentioned conventional one has a problem in that if hot water is again tapped immediately after the hot water is stopped, cold water will flow out from the faucet (22) for a reason other than the cold water sand. This problem occurs because the cold water in the bypass circuit (3) flows backward from the confluence point (31) toward the heat exchanger (2) when hot water is stopped.
【０００７】上記問題点について更に詳述する。出湯動
作中における通水路(1) 内の水温は熱交換器(2）の下流
側の温度がその上流側やバイパス回路(3）内の冷水の温
度よりも高温状態になっている。従って、通水路(1) と
バイパス回路(3）の分岐点(32)→熱交換器(2）→合流点
(31)→バイパス回路(3）→分岐点(32)と繋がるループ状
の閉回路(12)に着眼すると、熱交換器(2）部分で加熱さ
れた温水と非加熱状態にある冷水の境界点（以下、温度
境界点という）が二箇所存在する。即ち、合流点(31)に
一方の温度境界点(B) が存在すると共に熱交換器(2）の
吸熱入口(23)に他方の温度境界点(A) が存在するのであ
る。従って、出湯停止時には、上記温度境界点(A) (B)
を境に分離した閉回路(12)内の冷水と温水は、これら冷
水と温水の比重差により全体として閉回路(12)内で回転
するように流動し、これにより、上記境界点(A) (B) が
同一高さになった状態で安定する。即ち、出湯を停止し
た瞬間に合流点(31)にまで存在したバイパス回路(3）内
の冷水は、該出湯停止後に熱交換器(2）側に逆流して所
定の高さで安定するのである。すると、この安定点(35)
から上記合流点(31)に至る通水路(1) 部分には冷水が滞
留した状態になり、蛇口(22)を再開放したときは、該冷
水がバイパス回路(3）からの冷水と混合されて蛇口(22)
に供給され、所望温度の温水が取出せないのである。The above problem will be described in more detail. Regarding the water temperature in the water passage (1) during the hot water discharge operation, the temperature of the downstream side of the heat exchanger (2) is higher than the temperature of the cold water in the upstream side and in the bypass circuit (3). Therefore, branch point (32) of water passage (1) and bypass circuit (3) → heat exchanger (2) → confluence point
(31) → Bypass circuit (3) → Focusing on the loop-shaped closed circuit (12) connected to the branch point (32), the boundary between hot water heated in the heat exchanger (2) and cold water not heated There are two points (hereinafter referred to as temperature boundary points). That is, one temperature boundary point (B) exists at the confluence point (31), and the other temperature boundary point (A) exists at the heat absorption inlet (23) of the heat exchanger (2). Therefore, when tapping is stopped, the above temperature boundary points (A) (B)
The cold water and the hot water in the closed circuit (12) separated by the boundary flow so as to rotate in the closed circuit (12) as a whole due to the difference in specific gravity between the cold water and the hot water, and thereby the boundary point (A). Stabilizes when (B) is at the same height. That is, since the cold water in the bypass circuit (3) existing up to the confluence point (31) at the moment when the tapping is stopped, flows back to the heat exchanger (2) side after the tapping is stopped and stabilizes at a predetermined height. is there. Then, this stable point (35)
Cold water is retained in the water passage (1) from the above to the confluence point (31), and when the faucet (22) is reopened, the cold water is mixed with the cold water from the bypass circuit (3). Faucet (22)
The hot water of the desired temperature cannot be taken out.
【０００８】尚、上記従来のものでは、分配器（４）を
利用することによって熱交換器（２）からの温水とバイ
パス回路（３）からの冷水の混合割合いを調整している
が、合流点（３１）に感温ペレット式の調整弁を挿入し
て上記温水と冷水の混合割合いを調整するようにしても
上記と同様の問題が生じる。本発明は上記の点に鑑みて
成されたもので、『給湯場所に繋がる通水路（１）と、
該通水路（１）に配設された熱交換器（２）と、上記通
水路（１）に於ける前記熱交換器（２）の上・下両流路
部を繋ぎ且つ該熱交換器（２）の下方に形成されたバイ
パス回路（３）を具備し、熱交換器（２）で沸かした温
水に上記バイパス回路（３）からの冷水を混合して所望
温度の温水を取出すバイパスミキシング方式の給湯器』
において、出湯停止後の再出湯時に冷水が流出する不都
合を防止することをその課題とする。In the above-mentioned conventional apparatus, the mixing ratio of the hot water from the heat exchanger (2) and the cold water from the bypass circuit (3) is adjusted by utilizing the distributor (4). Even if a temperature sensitive pellet type adjusting valve is inserted at the confluence point (31) to adjust the mixing ratio of the hot water and the cold water, the same problem as described above occurs. The present invention has been made in view of the above points, and includes "a water passage (1) connected to a hot water supply place,
The heat exchanger (2) arranged in the water passage (1) and the upper and lower flow passages of the heat exchanger (2) in the water passage (1) are connected to each other and the heat exchanger is connected. Bypass mixing comprising a bypass circuit (3) formed below (2), wherein hot water boiled in the heat exchanger (2) is mixed with cold water from the bypass circuit (3) to take hot water of a desired temperature. Method water heater ”
In the above, it is an object to prevent the inconvenience that cold water flows out when hot water is again discharged after the hot water is stopped.
【０００９】[0009]
【技術的手段】上記課題を解決するための本発明の技術
的手段は、『熱交換器（２）とこれをバイパスするバイ
パス回路（３）とこれらを繋ぐ通水路（１）によって構
成されるループ状の閉回路（１２）をその最高位置ｂと
最低位置ａを結んで左右に形成した２経路のうち左側を
第１通水路、右側を第２通水路とし、出湯停止時に於け
る上記第１通水路内と第２通水路内の任意の高さｙ１，
ｙ２における滞留水の比重を夫々ρ１，ρ２，該通水路
部分の鉛直方向の微小高さを夫々ｄｙ１，ｄｙ２，更に
積分範囲を上記最低位置ａの高さから最高位置ｂの高さ
の範囲に設定した場合、∫ρ１ｄｙ１と∫ρ２ｄｙ２が
ほぼ等しくなるように、熱交換器（２）の下流側通水路
とバイパス回路（３）の合流点（３１）の高さを選定し
た』ことである。[Technical Means] A technical means of the present invention for solving the above-mentioned problem is constituted by "a heat exchanger (2), a bypass circuit (3) for bypassing the heat exchanger (2), and a water passage (1) connecting these. Of the two paths formed by connecting the highest position b and the lowest position a of the loop-shaped closed circuit (12) to the left and right, the left side is the first water passage and the right side is the second water passage. Arbitrary height y1 in the 1st waterway and the 2nd waterway
The specific gravity of the accumulated water at y2 is ρ1, ρ2, and the minute vertical heights of the water passages are dy1, dy2, and the integration range is from the height of the lowest position a to the height of the highest position b. When set, the heights of the confluence point (31) of the downstream water passage of the heat exchanger (2) and the bypass circuit (3) are selected so that ∫ρ1dy1 and ∫ρ2dy2 are substantially equal. ”
【００１０】[0010]
【作用】上記技術的手段は次のように作用する。熱交換
器(2）とこれをバイパスするバイパス回路(3）とそれら
を繋ぐ通水路(1) によって形成されたループ状の閉回路
(12)内は、出湯を停止させた瞬間の温度分布がその高さ
によって不均一な状態になっている。即ち、出湯停止し
た瞬間では、上部の熱交換器(2）の部分がその下方に位
置する通水路(1) やバイパス回路(3）の部分の滞留水よ
りも高温状態になっているのである。The above technical means operates as follows. A closed loop circuit formed by a heat exchanger (2), a bypass circuit (3) that bypasses the heat exchanger (2), and a water passage (1) that connects them.
In the inside of (12), the temperature distribution at the moment when the tapping is stopped is uneven due to its height. That is, at the moment the hot water is stopped, the upper heat exchanger (2) is at a higher temperature than the accumulated water in the water passage (1) and the bypass circuit (3) located below it. .
【００１１】従って、水温に依存する上記滞留水の比重
も閉回路(12)内に於ける各部の高さによって一定しな
い。ところが、上記技術的手段によれば、出湯停止時に ∫ρ1 ｄｙ1 ＝∫ρ2 ｄｙ2 ・・・(A) となるように、熱交換器(2）の下流側通水路とバイパス
回路(3）の合流点の高さを設定している。Therefore, the specific gravity of the accumulated water depending on the water temperature is not constant due to the height of each part in the closed circuit (12). However, according to the above technical means, the downstream water passage of the heat exchanger (2) and the bypass circuit (3) are merged so that ∫ρ1 dy1 = ∫ρ2 dy2 (A) when the hot water is stopped. The height of the point is set.
【００１２】但し、左辺の積分は、閉回路(12)の最高位
置ｂと最低位置ａを結んで左右に形成される経路のうち
左側の第１通水路に沿った積分であり、右辺は右側の第
２通水路に沿った積分である。又、上記式(A) における
ρ1 ，ρ2 は、出湯を停止させた瞬間に於ける第１通水
路内と第２通水路内の任意の高さｙ1 ，ｙ2 における水
の比重である。However, the integration on the left side is the integration along the first water passage on the left side of the path formed on the left and right by connecting the highest position b and the lowest position a of the closed circuit (12), and the right side is the right side. Is an integral along the second waterway of Further, ρ1 and ρ2 in the above equation (A) are specific gravities of water at arbitrary heights y1 and y2 in the first water passage and the second water passage at the moment when the hot water is stopped.
【００１３】従って、上記式(A) の各辺に重力の加速度
Ｇを乗じた値は、第１，第２通水路内の滞留水によって
夫々の通水路の最低位置（閉回路(12)の最低位置ａに一
致する）に生じる水圧を示すこととなる。そして、この
水圧は第１，第２通水路において等しいから、出湯停止
時に於ける上記閉回路(12)の最低位置ａに存在する水
は、上記第１，第２通水路の何れの方にも流動せずに停
止した状態を維持する。即ち、出湯停止時に閉回路(12)
内の水は該閉回路(12)内で何れの方向にも全体的に回転
することがなく、全体が停止した状態を維持するのであ
る。Therefore, the value obtained by multiplying each side of the above equation (A) by the acceleration G of gravity is the lowest position of each water passage (closed circuit (12)) due to the accumulated water in the first and second water passages. It indicates the water pressure generated at the lowest position a). Since this water pressure is the same in the first and second water passages, the water existing at the lowest position a of the closed circuit (12) when the hot water is stopped is discharged to either of the first and second water passages. Also keeps stopped without flowing. That is, the closed circuit (12) when the hot water is stopped
The water inside does not totally rotate in any direction within the closed circuit (12), and the whole state is stopped.
【００１４】従って、出湯停止時にバイパス回路(3）の
冷水は、熱交換器(2）側に向けて逆流することがなく該
熱交換器(2）の下流側通水路内に冷水が滞留することは
ない。Therefore, when the hot water is stopped, the cold water in the bypass circuit (3) does not flow backward toward the heat exchanger (2) side, and the cold water stays in the water passage downstream of the heat exchanger (2). There is no such thing.
【００１５】[0015]
【効果】本願発明は次の特有の効果を有する。出湯停止
時に熱交換器（２）の下流側の通水路（１）内に冷水が
滞留しないから、その後に再出湯させても給湯場所に冷
水が送られる不都合が防止できる。[Effect] The present invention has the following unique effects. Since the cold water does not stay in the water passage (1) on the downstream side of the heat exchanger (2) when the hot water is stopped, it is possible to prevent the inconvenience that the cold water is sent to the hot water supply place even if the hot water is again discharged.
【００１６】[0016]
【実施例】次に、本発明の第１実施例を図面に従って詳
述する。図１に示すように、通水路（１）にはその上流
側から水流スイッチ（１５），入水温センサ（１６），
分配器（４），熱交換器（２），該熱交換器（２）で沸
かされた温水の温度を検知する熱交センサ（１７），給
湯温センサ（２１）及び蛇口（２２）がこの順序で配設
されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, a water flow switch (15), an incoming water temperature sensor (16),
The distributor (4), the heat exchanger (2), the heat exchange sensor (17) for detecting the temperature of the hot water boiled in the heat exchanger (2), the hot water temperature sensor (21) and the faucet (22) They are arranged in order.
【００１７】分配器(4) の下流側の通水路(1) は、熱交
換器(2）用の缶体(25)の外周に捲回した後に該熱交換器
(2）の上部に位置する吸熱フィン(20)を蛇行状態で貫通
する。上記熱交換器(2）を加熱するガスバーナ(6) への
ガス回路(60)にはガス弁(61)が挿入されていると共に、
該ガス弁(61)や、上記した水流スイッチ(15)等の電気部
品は、出湯温度を設定する湯温設定器(41)と共に制御回
路(5）に接続されている。又、熱交換器(2）の下流側の
通水路(1) に配設された熱交センサ(17)と給湯温センサ
(21)の間と上記した分配器(4) 部分はバイパス回路(3）
で繋がっている。The water passage (1) on the downstream side of the distributor (4) is wound around the outer circumference of the can body (25) for the heat exchanger (2) and then the heat exchanger (2).
The endothermic fin (20) located above (2) is penetrated in a meandering state. A gas valve (61) is inserted in the gas circuit (60) to the gas burner (6) that heats the heat exchanger (2), and
The electric components such as the gas valve (61) and the water flow switch (15) described above are connected to the control circuit (5) together with the hot water temperature setting device (41) for setting the hot water temperature. In addition, the heat exchange sensor (17) and hot water temperature sensor installed in the water passage (1) on the downstream side of the heat exchanger (2).
Between the (21) and the distributor (4) above is the bypass circuit (3)
Are connected by.
【００１８】次に、上記熱交センサ(17)及び給湯温セン
サ(21)の間の通水路部とバイパス回路(3）の合流点(31)
の高さ位置について説明する。熱交換器(2）とこれをバ
イパスするバイパス回路(3）とそれらを繋ぐ通水路(1)
で構成された閉回路(12)の最高位置ｂと最低位置ａを結
んで左右に形成される２経路のうち左側を第１通水路、
右側を第２通水路とする。例えば、図１において、熱交
換器(2）の出口近傍の最高位置ｂから通水路(1) を経由
して合流点(31)からバイパス回路(3）を経て最低位置ａ
である分配器(4) に繋がる左側の通水路を第１通水路と
し、その反対側の右側の通水路を第２通水路とするので
ある。そして、出湯を停止させた瞬間に於ける第１通水
路内と第２通水路内の任意の高さｙ1 ，ｙ2 に於ける滞
留水の比重を夫々ρ1 ，ρ2 とし、該部分に於ける水路
の鉛直方向の微小高さを夫々ｄｙ1 ，ｄｙ2 とし、更に
積分範囲を最低位置ａの高さから最高位置ｂの高さの範
囲に設定した場合、∫ρ1 ｄｙ1 と∫ρ2 ｄｙ2 が等し
くなるように、熱交換器(2）の下流側通水路とバイパス
回路(3）の合流点(31)の高さを設定する。Next, a confluence point (31) between the water passage between the heat exchange sensor (17) and the hot water supply temperature sensor (21) and the bypass circuit (3).
The height position of will be described. Heat exchanger (2), bypass circuit (3) for bypassing it, and water passage (1) connecting them
The first water passage is on the left side of the two paths formed on the left and right by connecting the highest position b and the lowest position a of the closed circuit (12) constituted by
The right side is the second waterway. For example, in FIG. 1, from the highest position b near the outlet of the heat exchanger (2), through the water passage (1), from the confluence point (31) to the lowest position a via the bypass circuit (3).
The left water passage connected to the distributor (4) is the first water passage, and the right water passage on the opposite side is the second water passage. Then, the specific gravity of the accumulated water at arbitrary heights y1 and y2 in the first water passage and the second water passage at the moment when the hot water is stopped is set to ρ1 and ρ2, respectively, and the water passage in that portion is set. If the vertical heights of are set to dy1 and dy2, respectively, and the integration range is set from the height of the lowest position a to the height of the highest position b, then ∫ρ1 dy1 and ∫ρ2 dy2 will be equal. , Set the height of the confluence point (31) of the downstream water passage of the heat exchanger (2) and the bypass circuit (3).
【００１９】尚、図１では分配器（４）の部分を最低位
置ａとしたが、例えば、バイパス回路（３）が下方に湾
曲している場合には、湾曲した部分の最低点が最低位置
ａとなる。又、最高位置ｂについても同様の変形例が考
えられることは言うまでもない。上記第１通水路と第２
通水路に対応する上記２つの積分値を等しくする為の合
流点（３１）の高さは熱交換器（２）内の温度分布を求
めた後上記条件の下で積分方程式「∫ρ１ｄｙ１＝∫ρ
２ｄｙ２」を解くことによって知ることができる。In FIG. 1, the portion of the distributor (4) is set to the lowest position a, but when the bypass circuit (3) is curved downward, the lowest point of the curved portion is the lowest position. a. Needless to say, the same modification can be considered for the highest position b. The first water passage and the second
The height of the confluence point (31) for equalizing the above two integrated values corresponding to the water passage is obtained by obtaining the temperature distribution in the heat exchanger (2) and then calculating the integral equation “∫ρ1dy1 = ∫” under the above conditions. ρ
You can find out by solving "2dy2".
【００２０】[0020]
【００２１】次に、上記給湯器の給湯動作について説明
する。湯温設定器(41)で温度設定して蛇口(22)を開放す
ると、このときに生じる水流で水流スイッチ(15)がＯＮ
信号を出し、これにより、図示しない点火装置が駆動し
てガスバーナ(6) が点火せしめられる。次に、入水温セ
ンサ(16)が検知する入水温と熱交センサ(17)が検知する
温度の差が一定温度（この実施例では５５deg ）になる
ように、ガス弁(61)の開度を調整してガスバーナ(6) の
燃焼量をコントロールする。Next, the hot water supply operation of the water heater will be described. When the faucet (22) is opened by setting the temperature with the hot water temperature setting device (41), the water flow switch (15) is turned on by the water flow generated at this time.
A signal is emitted, which drives an ignition device (not shown) to ignite the gas burner (6). Next, the opening of the gas valve (61) is adjusted so that the difference between the incoming water temperature detected by the incoming water temperature sensor (16) and the temperature detected by the heat exchange sensor (17) becomes a constant temperature (55 deg in this embodiment). To control the combustion amount of the gas burner (6).
【００２２】以後、既述従来のものと同様に分配器(4)
を制御し、給湯温センサ(21)の検知温度と湯温設定器(4
1)の設定温度が等しくなるように、バイパス回路(3）と
熱交換器(2）への給水量の分配比率を調整し、これによ
り、湯温設定器(41)で設定した温度の温水が蛇口(22)に
供給されるようにする。次に蛇口(22)を閉じるとガスバ
ーナ(6) が消火せしめられると共に熱交換器(2）部分の
通水路(1) 内等に所定温度の温水が滞留した状態にな
る。Thereafter, the distributor (4) is the same as the conventional one described above.
Control the hot water temperature sensor (21) and the hot water temperature setting device (4
Adjust the distribution ratio of the amount of water supplied to the bypass circuit (3) and the heat exchanger (2) so that the set temperatures of (1) are the same, so that the hot water at the temperature set by the hot water temperature setter (41) is adjusted. Is supplied to the faucet (22). Next, when the faucet (22) is closed, the gas burner (6) is extinguished and hot water of a predetermined temperature is retained in the water passage (1) of the heat exchanger (2).
【００２３】上記の給湯器では、出湯を停止した際に、
分配器（４）から熱交換器（２）の頂部に至る第２通水
路に於ける既述「∫ρ２ｄｙ２」の値と、熱交換器
（２）→合流点（３１）→バイパス回路（３）→分配器
（４）と繋がる第１通水路に於ける既述「∫ρ１ｄｙ
１」の値が等しくなるように上記合流点（３１）の高さ
を設定している。従って、上記第１，第２通水路の夫々
の最低位置（閉回路（１２）の最低位置ａに一致する）
に作用する水圧が等しくなり、該閉回路（１２）内に水
の流れが生じることはない。即ち、バイパス回路（３）
内の冷水が合流点（３１）から熱交換器（２）側に逆流
する現象が生じないのである。In the above water heater, when the hot water is stopped,
The value of the above-mentioned “∫ρ2dy2” in the second water passage extending from the distributor (4) to the top of the heat exchanger (2) and the heat exchanger (2) → the confluence point (31) → the bypass circuit (3 ) → The above-mentioned “∫ρ1dy in the first waterway connected to the distributor (4)”
The height of the confluence point (31) is set so that the values of "1" are equal. Therefore, the lowest position of each of the first and second water passages (corresponds to the lowest position a of the closed circuit (12)).
The water pressures acting on are equalized and no water flow occurs in the closed circuit (12). That is, the bypass circuit (3)
The phenomenon that the cold water inside flows back from the confluence point (31) to the heat exchanger (2) side does not occur.
【００２４】[0024]
【００２５】[0025]
【００２６】[0026]
【００２７】[0027]
【００２８】[0028]
【００２９】次に、第２実施例を図２に従って説明す
る。この実施例では、通水路（１）が熱交換器（２）の
吸熱フィン（２０）に貫通する領域の最上流部Ｓの高さ
位置と、バイパス回路（３）と通水路（１）の合流点
（３１）部分の高さ位置を一致させている点を除いて既
述第１実施例と同様に構成されている。Next, a second embodiment will be described with reference to FIG. In this embodiment, the height position of the most upstream portion S of the region where the water passage (1) penetrates the heat absorbing fins (20) of the heat exchanger (2), the bypass circuit (3) and the water passage (1). The structure is the same as that of the above-described first embodiment except that the height positions of the confluence points (31) are matched.
【００３０】このものでは、ガスバーナ（６）で発生す
る熱の殆どが吸熱フィン（２０）の部分で通水路（１）
内の通水に熱移動する。従って、蛇口（２２）を閉じた
際は、通水路（１）が吸熱フィン（２０）に貫通する領
域の最上流部Ｓと上記合流点（３１）を結ぶ水平線
（Ｒ）より上方の閉回路（１２）内通には熱交換器
（２）で加熱生成された高温水が滞留し、該水平線
（Ｒ）より低い位置の閉回路（１２）内（合流点（３
１）→バイパス回路（３）→分配器（４）→吸熱フィン
（２０）と繋がる通水路）には加熱されていない冷水が
滞留した力学的に安定した状態になる。即ち、この第２
実施例のものでは、合流点（３１）と前記最上流部Ｓの
高さを一致させることにより、出湯を停止した際に、最
低位置ａたる分配器（４）→熱交換器（２）内→熱交換
器（２）の頂部（最高位置ｂ）と繋がる第２通水路内の
滞留水の既述「∫ρ２ｄｙ２」の値と、熱交換器（２）
の頂部（最高位置ｂ）→合流点（３１）→バイパス回路
（３）→分配器（４）（最低位置ａ）と繋がる第１通水
路に於ける既述「∫ρ１ｄｙ１」の値がほぼ等しくなる
ようにしている。従って、該蛇口（２２）を閉じた出湯
停止時には、バイパス回路（３）内の冷水が合流点（３
１）から熱交換器（２）側に逆流しないこととなる。よ
って、蛇口（２２）を再開放した際に該蛇口（２２）か
ら冷水が流出する不都合が防止できる。In this case, most of the heat generated in the gas burner (6) is in the water absorbing passages (1) at the heat absorbing fins (20).
Heat is transferred to the water flow inside. Therefore, when the faucet (22) is closed, the closed circuit above the horizontal line (R) connecting the uppermost stream portion S of the region where the water passage (1) penetrates the heat absorbing fins (20) and the confluence point (31). (12) The high temperature water generated by heating in the heat exchanger (2) stays in the inner passage, and is inside the closed circuit (12) at a position lower than the horizontal line (R) (confluence point (3
1) → Bypass circuit (3) → Distributor (4) → The water passage connecting to the heat absorbing fins (20) is in a mechanically stable state in which unheated cold water is retained. That is, this second
In the embodiment, by matching the confluence point (31) and the height of the uppermost stream part S, the distributor (4) → the heat exchanger (2) which is the lowest position a when the tapping is stopped. → The value of the above-mentioned “∫ρ2dy2” of accumulated water in the second water passage connected to the top (highest position b) of the heat exchanger (2) and the heat exchanger (2)
(Top position b) → confluence point (31) → bypass circuit (3) → distributor (4) (lowest position a) The above-mentioned “∫ρ1dy1” values in the first waterway are almost equal. I am trying to become. Therefore, when the tapping with the faucet (22) closed is stopped, the cold water in the bypass circuit (3) joins the confluence point (3).
There will be no backflow from 1) to the heat exchanger (2) side. Therefore, it is possible to prevent the inconvenience that cold water flows out from the faucet (22) when the faucet (22) is reopened.
【００３１】尚、上記のものでは、吸熱フィン（２０）
の上流側の熱交換器（２）用の缶体（２５）に捲回され
た通水路（１）の温度は殆ど加熱昇温せしめられていな
いと考え、該部分の通水を冷水として扱って、既述最上
流部Ｓの高さ位置と合流点（３１）の高さを一致させ
た。ところが、捲回された通水路（１）の通水の昇温量
は、缶体（２５）への密着程度、捲回長さによっては、
全体の１割程度有する場合があるため、その昇温量を考
慮すると前記第２通水路側の圧力が小さくなって、出湯
停止時に熱交換器（２）で沸かされた温水が合流点（３
１）からバイパス回路（３）に若干侵入する恐れがあ
る。従って、通水路（１）が缶体（２５）に捲回されて
いる領域の昇温量が無視できない熱交換器（２）では、
合流点（３１）の高さを最上流部Ｓの高さより若干低く
設定すれば既述「∫ρ１ｄｙ１」と「∫ρ２ｄｙ２」が
ほぼ等しくなる。In the above, the heat absorbing fins (20) are used.
It is considered that the temperature of the water passage (1) wound around the can body (25) for the heat exchanger (2) on the upstream side of is almost not heated and raised, and the water passage of the portion is treated as cold water. Then, the height position of the uppermost stream portion S and the height of the confluence point (31) are matched. However, the temperature rise of the water flowing through the wound water passage (1) depends on the degree of close contact with the can body (25) and the winding length.
Since it may have about 10% of the whole, the pressure on the side of the second water passage becomes small in consideration of the amount of temperature rise, and the hot water boiled in the heat exchanger (2) when the tap water is stopped is joined (3).
There is a possibility that the bypass circuit (3) may slightly enter from 1). Therefore, in the heat exchanger (2) in which the amount of temperature rise in the region where the water passage (1) is wound around the can body (25) cannot be ignored,
If the height of the confluence point (31) is set to be slightly lower than the height of the uppermost stream portion S, the above-mentioned “∫ρ1dy1” and “∫ρ2dy2” become substantially equal.
【００３２】又、熱交換器（２）内の吸熱フィン（２
０）を貫通する通水路（１）の出入口が高さ方向に幅を
有する場合（該出入口が高低差を有する場合）、その入
口部から出口部への温度勾配を考慮した際は前記の如く
高さを一致させると前記第２通水路側の圧力が大きくな
る。従って、バイパス回路（３）内の冷水が合流点（３
１）から熱交換器（２）側に若干逆流する恐れがある。
従って、吸熱フィン（２０）を貫通する通水路（１）の
出入口が高低差を有するものでは、合流点（３１）の高
さを最上流部Ｓの高さ位置より若干高く設定すれば、既
述「∫ρ１ｄｙ１」と「∫ρ２ｄｙ２」がほぼ等しくな
る。Further, the heat absorbing fins (2) in the heat exchanger (2)
When the inlet / outlet of the water passage (1) passing through 0) has a width in the height direction (when the inlet / outlet has a height difference), the temperature gradient from the inlet to the outlet is taken into consideration as described above. When the heights are matched, the pressure on the side of the second water passage increases. Therefore, the cold water in the bypass circuit (3) is confluent (3
There is a risk of a slight reverse flow from 1) to the heat exchanger (2) side.
Therefore, in the case where the inlet and outlet of the water passage (1) penetrating the heat absorbing fins (20) have a height difference, if the height of the confluence point (31) is set slightly higher than the height position of the most upstream portion S, The statement “∫ρ1dy1” and “∫ρ2dy2” are almost equal.
【００３３】尚、図３に示すように、合流点の下流側に
コイル（９９）を挿入すると、合流点（３１）で合流し
た高温水と冷水がこの部分を通過する際に撹拌されて混
合が確実となり、給湯温センサ（２１）による誤検知を
防止できる。As shown in FIG. 3, when the coil (99) is inserted on the downstream side of the confluence point, the hot water and the cold water that have merged at the confluence point (31) are agitated and mixed when passing through this portion. Is ensured, and erroneous detection by the hot water temperature sensor (21) can be prevented.
【００３４】更に、上記コイル(99)を挿入した部分の通
水路(1) を屈曲させれば、水流が一層かき乱されるか
ら、上記冷水と温水をより確実に混合できる。尚、コイ
ル(99)は通水路(1) 内に於いて長い距離に挿入した方が
混合度合が向上する。従って、本発明のように、合流点
(31)を熱交換器(2）の吸熱フィン(20)の装着部近傍に設
定すると、給湯器を大きくすることなく合流点(31)と給
湯温センサ(21)の間に比較的長い距離を確保することが
でき、給湯器を大きくすることなく、長いコイルを使っ
た混合が可能となる。Further, if the water passage (1) in the portion where the coil (99) is inserted is bent, the water flow is further disturbed, so that the cold water and the hot water can be mixed more reliably. It should be noted that the coil (99) is improved in mixing degree when it is inserted at a long distance in the water passage (1). Therefore, as in the present invention,
If (31) is set near the end of the heat exchanger (2) where the heat absorbing fins (20) are installed, a relatively long distance between the confluence point (31) and the hot water temperature sensor (21) can be obtained without enlarging the water heater. Therefore, it is possible to perform mixing using a long coil without increasing the size of the water heater.
【図１】本発明の第１実施例の説明図FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
【図２】本発明の第２実施例の説明図FIG. 2 is an explanatory diagram of a second embodiment of the present invention.
【図３】合流点（３１）と給湯温センサ（２１）の間の
通水路（１）部分にコイル（９９）を装填した場合の説
明図FIG. 3 is an explanatory view of a case where a coil (99) is installed in a water passage (1) portion between a confluence point (31) and a hot water supply temperature sensor (21).
【図４】従来例の説明図FIG. 4 is an explanatory view of a conventional example.
（１） ・・通水路 （２） ・・・熱交換器 （３） ・・・バイパス回路 （１２）・・・閉回路 （２０）・・・吸熱フィン (1) ・ ・ Water passage (2) ・ ・ ・ Heat exchanger (3) ・ ・ ・ Bypass circuit (12) ・ ・ ・ Closed circuit (20) ・ ・ ・ Heat absorption fin
Claims (1)
水路（１）に配設された熱交換器（２）と、上記通水路
（１）に於ける前記熱交換器（２）の上・下両流路部を
繋ぎ且つ該熱交換器（２）の下方に形成されたバイパス
回路（３）を具備し、熱交換器（２）で沸かした温水に
上記バイパス回路（３）からの冷水を混合して所望温度
の温水を取出すバイパスミキシング方式の給湯器におい
て、熱交換器（２）とこれをバイパスするバイパス回路
（３）とこれらを繋ぐ通水路（１）によって構成される
ループ状の閉回路（１２）をその最高位置ｂと最低位置
ａを結んで左右に形成した２経路のうち左側を第１通水
路、右側を第２通水路とし、出湯停止時に於ける上記第
１通水路内と第２通水路内の任意の高さｙ１，ｙ２にお
ける滞留水の比重を夫々ρ１，ρ２，該通水路部分の鉛
直方向の微小高さを夫々ｄｙ１，ｄｙ２，更に積分範囲
を上記最低位置ａの高さから最高位置ｂの高さの範囲に
設定した場合、∫ρ１ｄｙ１と∫ρ２ｄｙ２がほぼ等し
くなるように、熱交換器（２）の下流側通水路とバイパ
ス回路（３）の合流点（３１）の高さを選定したバイパ
スミキシング方式の給湯器。1. A water passage (1) connected to a hot water supply place, a heat exchanger (2) arranged in the water passage (1), and the heat exchanger (2) in the water passage (1). ) Is provided with a bypass circuit (3) formed by connecting both the upper and lower flow paths and below the heat exchanger (2), and the bypass circuit (3) is provided for hot water boiled in the heat exchanger (2). In the bypass mixing type water heater that mixes the cold water from the above) to take out hot water of a desired temperature, the heat exchanger (2), the bypass circuit (3) for bypassing the heat exchanger (2), and the water passage (1) connecting these are formed. Of the two paths formed by connecting the highest position b and the lowest position a of the closed loop circuit (12) on the left and right sides, the left side is the first water passage and the right side is the second water passage, and when the hot water is stopped, The specific gravity of accumulated water at arbitrary heights y1 and y2 in the first water passage and the second water passage Ρ1, ρ2, respectively, when the vertical heights of the water passages are dy1, dy2, and the integration range is set in the range from the height of the lowest position a to the height of the highest position b, ∫ρ1dy1 A bypass mixing type water heater in which the height of the confluence point (31) of the downstream water passage of the heat exchanger (2) and the bypass circuit (3) is selected so that ∫ρ2dy2 becomes substantially equal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4156968A JP2678330B2 (en) | 1992-06-16 | 1992-06-16 | Bypass mixing type water heater |
| KR1019930009052A KR960015203B1 (en) | 1992-06-16 | 1993-05-25 | By-pass mixing style in warm water supplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4156968A JP2678330B2 (en) | 1992-06-16 | 1992-06-16 | Bypass mixing type water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH062944A JPH062944A (en) | 1994-01-11 |
| JP2678330B2 true JP2678330B2 (en) | 1997-11-17 |
Family
ID=15639263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4156968A Expired - Lifetime JP2678330B2 (en) | 1992-06-16 | 1992-06-16 | Bypass mixing type water heater |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2678330B2 (en) |
| KR (1) | KR960015203B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396996C (en) * | 2003-12-09 | 2008-06-25 | 林内株式会社 | Hot water supplyer |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5749652U (en) * | 1980-09-03 | 1982-03-20 | ||
| JPS6438550A (en) * | 1987-07-31 | 1989-02-08 | Noritz Corp | Hot water feeder |
| JPH0731534B2 (en) * | 1988-01-20 | 1995-04-10 | 三菱電機株式会社 | How to create an offset shape |
| JPH01210754A (en) * | 1988-02-17 | 1989-08-24 | Rinnai Corp | Controller of forced combustion type hot water feeder |
| JP2583020Y2 (en) * | 1991-10-29 | 1998-10-15 | 株式会社ガスター | Water heater |
| JPH05118655A (en) * | 1991-10-30 | 1993-05-14 | Noritz Corp | Bypass mixing type hot-water supplying apparatus |
-
1992
- 1992-06-16 JP JP4156968A patent/JP2678330B2/en not_active Expired - Lifetime
-
1993
- 1993-05-25 KR KR1019930009052A patent/KR960015203B1/en active IP Right Grant
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396996C (en) * | 2003-12-09 | 2008-06-25 | 林内株式会社 | Hot water supplyer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH062944A (en) | 1994-01-11 |
| KR960015203B1 (en) | 1996-11-01 |
| KR940000824A (en) | 1994-01-10 |
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