JPH0253697B2 - - Google Patents
Info
- Publication number
- JPH0253697B2 JPH0253697B2 JP15062889A JP15062889A JPH0253697B2 JP H0253697 B2 JPH0253697 B2 JP H0253697B2 JP 15062889 A JP15062889 A JP 15062889A JP 15062889 A JP15062889 A JP 15062889A JP H0253697 B2 JPH0253697 B2 JP H0253697B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- valve
- water flow
- flow valve
- temperature
- 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
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 118
- 238000010926 purge Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、水量制御により過流出による出湯温
度の低下を防止する瞬間湯沸器に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an instantaneous water heater that prevents a drop in outlet temperature due to excessive outflow by controlling the amount of water.
従来、過流出による出湯温度の低下を防止する
ために水量制御を行う瞬間湯沸器、大型給湯器に
おいては、所定の出湯温度が得られる設定最大水
量よりも多量の水量を流そうとすれば、温度調節
装置の水量弁が閉弁方向に動かされて、水量を設
定最大水量に抑えるように構成されている。
Conventionally, in instantaneous water heaters and large water heaters that control the water flow to prevent a drop in the hot water temperature due to excessive overflow, if you try to flow a larger amount of water than the set maximum water flow to obtain a predetermined hot water temperature, The water volume valve of the temperature control device is moved in the valve closing direction to suppress the water volume to a set maximum water volume.
例えば、入水温度を20℃、設定温度を43℃、器
具の最大出湯能力を16.5号とすれば、上記設定最
大水量Q0は、
Q0＝16.5×25／（43−20）＝17.9／min.
となる。 For example, if the inlet water temperature is 20℃, the set temperature is 43℃, and the maximum hot water output capacity of the appliance is 16.5, the maximum water flow rate Q 0 set above is: Q 0 = 16.5 × 25 / (43-20) = 17.9 / min .
つまり、器具の最大出湯能力からみて、設定温
度（43℃）に加熱することのできる最大の水量が
17.9／min.であり、これ以上の水量を流すと出
湯される温度は設定温度（43℃）よりも低下する
ものである。 In other words, considering the maximum hot water output capacity of the appliance, the maximum amount of water that can be heated to the set temperature (43℃) is
17.9/min., and if more water flows than this, the temperature of the hot water will drop below the set temperature (43°C).
また、一般の過流出防止装置は、水量弁の開度
を、上記設定最大水量Q0としてQ0＝17.9／
min.が得られるように制御するものであり、設
定最大水量以上（17.9／min.以上）を流した場
合は、水量弁を閉動作せしめ、逆の場合は開動作
せしめるものである。 In addition, in a general overflow prevention device, the opening degree of the water flow valve is set as Q 0 = 17.9/
If the set maximum water flow rate (17.9/min. or higher) is flowed, the water flow valve is closed, and in the opposite case, it is opened.
ところが、上記従来の湯沸器の実際の使用状態
においては、設定最大水量（Q0＝17.9／min.）
を流して使用する場合が殆ど無く、通常の場合に
は17.9／min.以下の水量で使用することにな
る。
However, under the actual usage conditions of the above conventional water heater, the set maximum water flow rate (Q 0 = 17.9/min.)
There are almost no cases where it is used with water flowing, and in normal cases, the amount of water used is less than 17.9/min.
このように17.9／min.以下の水量で使用する
場合は、過流出防止装置が水量弁の開度を設定最
大水量（Q0＝17.9／min.）になるよう開方向に
駆動され、水量が設定最大水量（Q0＝17.9／
min.）を超えることが無いから、水量弁は全開
状態で使用されることになる。 In this way, when using water at a flow rate of 17.9/min. or less, the overflow prevention device drives the water flow valve in the opening direction so that the opening degree of the water flow valve reaches the set maximum water flow rate (Q 0 = 17.9/min.). Set maximum water volume (Q 0 = 17.9/
min.), so the water flow valve is used in the fully open state.
また、夏季には設定温度が高温にされる機会が
少ないことから、水量弁は長期間全開状態に保持
されることになる。 Furthermore, since there are few opportunities to set the set temperature to a high temperature in the summer, the water flow valve is kept fully open for a long period of time.
上述の如く水量弁は全開状態で使用されること
が殆どであり、水量弁が長期間全開状態に保持さ
れている間に、水中のカルシウム、マグネシウム
等の金属が析出して、水量弁を開弁状態に固着し
てしまうという問題があつた。 As mentioned above, the water flow valve is mostly used in the fully open state, and while the water flow valve is kept fully open for a long period of time, metals such as calcium and magnesium in the water will precipitate and cause the water flow valve to open. There was a problem with the valve becoming stuck in the valve state.
さらに、出湯温度調節用の水量弁が開弁された
まま一旦停止後に再出湯すると、出湯温度が落ち
込むという問題があつた。 Furthermore, there was a problem in that when hot water was restarted after being temporarily stopped with the water flow valve for adjusting the temperature of hot water opened, the temperature of the hot water would drop.
本発明の目的は、上記問題点を解決し、出湯温
度調節用の水量弁の固着を防止するとともに、一
旦停止後に再出湯する際の出湯温度の落ち込みを
小さくすることのできる瞬間湯沸器を提供するこ
とである。 An object of the present invention is to provide an instantaneous water heater that solves the above-mentioned problems, prevents the water flow valve for adjusting the hot water temperature from sticking, and reduces the drop in the hot water temperature when hot water is turned on again after being temporarily stopped. It is to provide.
本発明の瞬間湯沸器は、熱交換器と、熱交換器
を加熱する能力可変のガスバーナと、熱交換器に
連なる水路に設けた出湯温度調節用の水量弁と、
出湯温度を設定する制御操作器と、前記水量弁を
制御操作器により設定された設定温度と前記ガス
バーナの能力に応じて制御する制御回路を備えた
湯沸器において、当該制御回路に、プリパージ時
に前記水量弁を一旦閉弁し、次いで開弁される指
令手段を設けたものである。
The instantaneous water heater of the present invention includes a heat exchanger, a gas burner with variable capacity for heating the heat exchanger, and a water flow valve for adjusting the temperature of hot water provided in a waterway connected to the heat exchanger.
In a water heater equipped with a control operating device that sets the hot water temperature, and a control circuit that controls the water flow valve according to the set temperature set by the control operating device and the capacity of the gas burner, the control circuit is provided with a A command means is provided to once close the water flow valve and then open it.
上述のとおり構成された本発明の瞬間湯沸器に
おいては、出湯を開始するとプリパージ動作が行
われ、このプリパージ動作中に指令手段から閉弁
指令が出力されて、該閉弁指令により水量弁が駆
動されて一旦閉弁される。
In the instantaneous water heater of the present invention configured as described above, a pre-purge operation is performed when hot water starts to be dispensed, and during this pre-purge operation, a valve closing command is output from the command means, and the water flow valve is controlled by the valve closing command. The valve is driven and temporarily closed.
次いで、指令手段から出力される開弁指令によ
り水量弁が開弁駆動され、プリパージ動作終了後
にガスバーナが点火されて出湯が行われ、制御操
作器により設定された設定湯温と前記ガスバーナ
の能力に応じて水量弁を制御し、出湯温度を調節
するものである。 Next, the water flow valve is driven to open by the valve opening command outputted from the command means, and after the pre-purge operation is completed, the gas burner is ignited to discharge hot water, and the hot water temperature set by the control device and the capacity of the gas burner are adjusted. The water flow valve is controlled accordingly to adjust the hot water temperature.
本発明の実施例を図面に基づいて説明する。 Embodiments of the present invention will be described based on the drawings.
第１図は本発明の一実施例に係る瞬間湯沸器の
概略構成図、第２図は同じく制御ブロツク図であ
り、熱交換器１に連通された給水路に入水量検出
装置２を設け、出湯路に水量制御弁装置３、先栓
４及び温度センサー１０を設ける。 FIG. 1 is a schematic configuration diagram of an instantaneous water heater according to an embodiment of the present invention, and FIG. 2 is a control block diagram as well. , a water flow control valve device 3, a tap 4, and a temperature sensor 10 are installed in the hot water outlet path.
熱交換器１を加熱するガスバーナ５のガス供給
路に、コイル電流値の増減によりガス供給量が調
節されるガス比例弁６を設ける。 A gas proportional valve 6 is provided in the gas supply path of the gas burner 5 that heats the heat exchanger 1, and the gas supply amount is adjusted by increasing or decreasing the coil current value.
このように構成された給湯器具に、マイクロコ
ンピユータ等から成る制御回路７を設置して次の
(1)〜(3)の制御を行う。 A control circuit 7 consisting of a microcomputer, etc. is installed in the water heater configured in this manner to perform the following operations.
Controls (1) to (3) are performed.
(1) 制御操作器８により設定された設定温度と温
度センサー１０で検出した出湯温度との差に応
じてガス比例弁６のコイル電流を制御するとと
もに、ガスバーナ５の最大能力と前記制御操作
器８により設定された設定湯温とに基づき、そ
の設定湯温に対応する最大水量Q0を最大水量
演算部７１にて演算する。(1) The coil current of the gas proportional valve 6 is controlled according to the difference between the set temperature set by the control operator 8 and the hot water temperature detected by the temperature sensor 10, and the coil current of the gas proportional valve 6 is controlled according to the maximum capacity of the gas burner 5 and the control operator Based on the set hot water temperature set in step 8, the maximum water amount Q 0 corresponding to the set hot water temperature is calculated by the maximum water amount calculating section 71.
(2) 先栓４の開弁時に入水量検出装置２の出力信
号に基づき、入水量Ｑが最低作動水量（M.O.
Q.）以上であることをM.O.Q.判定部７２で判
定した時にプリパージ後にガスバーナ５の点火
を行うとともに、水量比較部７３において入水
量Ｑと最大水量Q0とを比較し、入水量Ｑが最
大水量Q0を上回る時には閉弁駆動部７４が作
動して水量制御弁装置３のサーボモータ３１に
閉弁指令を出力し、サーボモータ３１により駆
動される水量弁３２の流量を最大水量Q0に調
節する。(2) Based on the output signal of the inflow water amount detection device 2 when the tip valve 4 is opened, the inflow water amount Q is determined to be the minimum operating water amount (MO
Q.) When the MOQ determining unit 72 determines that the MOQ is above, the gas burner 5 is ignited after pre-purging, and the water amount comparing unit 73 compares the incoming water amount Q with the maximum water amount Q0 , and the incoming water amount Q is the maximum water amount. When Q 0 is exceeded, the valve closing drive unit 74 operates and outputs a valve closing command to the servo motor 31 of the water flow control valve device 3, and adjusts the flow rate of the water flow valve 32 driven by the servo motor 31 to the maximum water flow Q 0 . do.
逆に、入水量Ｑが最大水量Q0を下回る時に
は開弁駆動部７５が作動してサーボモータ３１
に開弁指令を出力し、水量弁３２を開く。 Conversely, when the amount of water entering Q is less than the maximum amount of water Q0 , the valve opening drive unit 75 operates and the servo motor 31
A valve opening command is output to open the water flow valve 32.
(3) 一旦停止後再出湯のために先栓４を開き、プ
リパージ動作が開始されると、閉弁指令部７６
が作動し、サーボモータ３１に閉弁指令を出力
して一旦水量弁３２を閉弁させ、次いで閉弁指
令部７６の所定時間作動後に開弁指令部７７が
作動し、所定時間サーボモータ３１に開弁指令
を出力して開弁させるように水量制御弁装置３
を制御する。(3) Once the tap 4 is opened for re-discharge after stopping and the pre-purge operation is started, the valve closing command unit 76
is activated, outputs a valve closing command to the servo motor 31 to temporarily close the water flow valve 32, and then, after the valve closing command part 76 has been activated for a predetermined time, the valve open command part 77 is activated, and the servo motor 31 is activated for a predetermined time. The water flow control valve device 3 outputs a valve opening command to open the valve.
control.
このプリパージ中における水量弁３２の動作
中は入水量Ｑの検出を行わず、水量弁３２の開
動作が終了してから入水量Ｑの検出を再開す
る。 While the water volume valve 32 is operating during this pre-purge, the amount of water entering Q is not detected, and the detection of the amount of water entering Q is restarted after the opening operation of the water amount valve 32 is completed.
これにより、水量弁３２の上記動作中は入水
量Ｑが最低作動水量（M.O.Q.）より少なくな
つた時でも器具の燃焼動作が停止することはな
い。 As a result, during the above-mentioned operation of the water flow valve 32, the combustion operation of the appliance does not stop even when the water flow Q becomes less than the minimum operating water flow (MOQ).
上述の構成により、出湯が一旦停止された後に
再出湯される時のプリパージ動作が行われる毎に
水量弁３２が一旦閉弁されてから開弁されるとい
う動作を行うので、水量弁３２の固着が防止され
る。 With the above-mentioned configuration, the water flow valve 32 is closed and then opened every time the pre-purge operation is performed when the hot water is once stopped and then the hot water is restarted, so that the water flow valve 32 does not become stuck. is prevented.
また、プリパージ動作中に一旦水量弁３２を閉
弁させるので、着火までの通水量が少なくなり、
再出湯時の出湯温度の落ち込みを小さくすること
ができる。 In addition, since the water flow valve 32 is temporarily closed during the pre-purge operation, the amount of water flowing until ignition is reduced.
It is possible to reduce the drop in hot water temperature when hot water is re-discharged.
本発明は上述のとおり構成されているので、以
下に記載する効果を奏する。
Since the present invention is configured as described above, it produces the effects described below.
プリパージ動作時に水量弁が一旦閉弁され、次
いで開弁されるように指令する指令手段を設けて
あるため、水量弁がプリパージ動作の行われる度
に動作させられることになり、水中から析出した
金属等の集積による水量弁の固着を防止すること
ができる。 Since a command means is provided to instruct the water flow valve to be closed once and then opened during the pre-purge operation, the water flow valve is operated every time the pre-purge operation is performed, and the metal precipitated from the water is removed. It is possible to prevent the water flow valve from sticking due to the accumulation of such substances.
また、再使用開始から着火までの通水量が少な
く、再出湯時の出湯温度の落ち込みを小さくする
ことができる。 In addition, the amount of water flowing from the start of reuse to ignition is small, and the drop in temperature of hot water when hot water is re-discharged can be reduced.
図は本発明の実施例を示すもので、第１図は本
発明の一実施例に係る瞬間湯沸器の概略構成図、
第２図は同じく制御ブロツク図である。
１……熱交換器、３……水量制御弁装置、５…
…ガスバーナ、７……制御回路、８……制御操作
器、３２……水量弁、７６……閉弁指令部（指令
手段）、７７……開弁指令部（指令手段）。
The figures show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of an instantaneous water heater according to an embodiment of the present invention.
FIG. 2 is also a control block diagram. 1... Heat exchanger, 3... Water flow control valve device, 5...
... Gas burner, 7 ... Control circuit, 8 ... Control operator, 32 ... Water flow valve, 76 ... Valve closing command section (command means), 77 ... Valve opening command section (command means).
Claims (1)
ガスバーナと、熱交換器に連なる水路に設けた水
量弁と、出湯温度を設定する制御操作器と、前記
水量弁を制御操作器により設定された設定湯温と
前記ガスバーナの能力に応じて制御する制御回路
を備えた湯沸器において、当該制御回路に、プリ
パージ時に前記水量弁を一旦閉弁し、次いで開弁
される指令手段を設けたことを特徴とする瞬間湯
沸器。1. A heat exchanger, a gas burner with variable capacity for heating the heat exchanger, a water flow valve provided in a waterway connected to the heat exchanger, a control operator for setting the hot water temperature, and a controller for setting the water flow valve. In the water heater equipped with a control circuit that controls according to the set water temperature and the capacity of the gas burner, the control circuit is provided with a command means for temporarily closing and then opening the water flow valve during pre-purge. An instant water heater that is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15062889A JPH0278853A (en) | 1989-06-15 | 1989-06-15 | Instantaneous hot water boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15062889A JPH0278853A (en) | 1989-06-15 | 1989-06-15 | Instantaneous hot water boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0278853A JPH0278853A (en) | 1990-03-19 |
| JPH0253697B2 true JPH0253697B2 (en) | 1990-11-19 |
Family
ID=15501015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15062889A Granted JPH0278853A (en) | 1989-06-15 | 1989-06-15 | Instantaneous hot water boiler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0278853A (en) |
-
1989
- 1989-06-15 JP JP15062889A patent/JPH0278853A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0278853A (en) | 1990-03-19 |
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