JPH10160246A - One-can two-channel bath hot water supply equipment - Google Patents

One-can two-channel bath hot water supply equipment

Info

Publication number
JPH10160246A
JPH10160246A JP8327866A JP32786696A JPH10160246A JP H10160246 A JPH10160246 A JP H10160246A JP 8327866 A JP8327866 A JP 8327866A JP 32786696 A JP32786696 A JP 32786696A JP H10160246 A JPH10160246 A JP H10160246A
Authority
JP
Japan
Prior art keywords
water level
hot water
water
level detection
heat exchanger
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.)
Granted
Application number
JP8327866A
Other languages
Japanese (ja)
Other versions
JP3776997B2 (en
Inventor
Yukinobu Noguchi
幸伸 野口
Kikuo Okamoto
喜久雄 岡本
Shuichi Onodera
修一 小野寺
Tatsuo Yamaguchi
健生 山口
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gastar Co Ltd
Original Assignee
Gastar Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gastar Co Ltd filed Critical Gastar Co Ltd
Priority to JP32786696A priority Critical patent/JP3776997B2/en
Publication of JPH10160246A publication Critical patent/JPH10160246A/en
Application granted granted Critical
Publication of JP3776997B2 publication Critical patent/JP3776997B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide a one-can two-channel bath hot water supply equipment for preventing an inaccurate bath tube water level from being detected due to a hot water-supply single operation and hence an equipment from malfunctioning. SOLUTION: A hot water-supply single operation monitoring part 44 and a water level detection stop part 48 are provided at a control device 40. The hot water-supply single operation monitoring part 44 monitors whether a hot water-supply single operation is being carried out not. The water level detection stopping part 48 suspends a water level detection operation by a water level sensor 28 during hot water-supply single operation and until a predetermined water level suspension time tst passes after the hot water-supply single operation. The water level detection suspension time tst is set by obtaining the time after the hot water-supply single operation that is required until the convection of hot water of a reheating heat-exchanger 4 caused by the hot water-supply single operation ends due to the cooling of the reheating heat-exchanger 4 after the hot water supply single operation, and the hot water temperature at the arrangement position of the water level sensor 28 decreases to the assurance temperature of the sensor, and the sensor output of the water level sensor 28 becomes stable, and an accurate bath tube water level can be detected.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、給湯熱交換器と追
い焚き熱交換器が一体化され、その一体化した熱交換器
を共通のバーナーで加熱する一缶二水路風呂給湯器に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-can-two-channel bath water heater in which a hot water supply heat exchanger and a reheating heat exchanger are integrated, and the integrated heat exchanger is heated by a common burner. is there.

【0002】[0002]

【従来の技術】図6には出願人らが開発している一缶二
水路風呂給湯器のシステム構成例が示されている。同図
において、この一缶二水路風呂給湯器(器具)は燃焼室
1を有し、この燃焼室1にはバーナー2が配設され、こ
のバーナー2の上方には給湯熱交換器3と追い焚き熱交
換器4が設けられている。これら給湯熱交換器3と追い
焚き熱交換器4は一体化されて配設されている。すなわ
ち、複数の共通のフィンプレート5に給湯側の管路を貫
通装着して給湯熱交換器3と成し、同じくフィンプレー
ト5に追い焚き側の管路を貫通装着して風呂熱交換器4
と成しており、上記バーナー2は給湯熱交換器3と追い
焚き熱交換器4を共に加熱する構成になっている。
2. Description of the Related Art FIG. 6 shows an example of a system configuration of a one-can-two-channel bath water heater developed by the applicants. In this figure, this one-can two-channel bath water heater (apparatus) has a combustion chamber 1, in which a burner 2 is disposed. A burning heat exchanger 4 is provided. The hot water supply heat exchanger 3 and the reheating heat exchanger 4 are disposed integrally. That is, a hot water supply heat exchanger 3 is formed by penetrating a plurality of common fin plates 5 with a hot water supply side pipe, and a hot water supply heat exchanger 3 is similarly mounted by penetrating a fin plate 5 with a supplementary heating side pipe.
The burner 2 is configured to heat both the hot water supply heat exchanger 3 and the additional heating heat exchanger 4.

【0003】上記バーナー2の下方側の燃焼室1は給気
通路6に連通され、この給気通路6には燃焼ファン7が
組み込まれており、燃焼ファン7の回転駆動により外部
から給気通路6を介してバーナー2へ空気が送り込まれ
ると共に、バーナー2の燃焼により生じた排気ガスがバ
ーナー2の上方の燃焼室1に連通する排気通路9から外
部へ排出される。
The combustion chamber 1 below the burner 2 communicates with an air supply passage 6, and a combustion fan 7 is incorporated in the air supply passage 6. Air is sent to the burner 2 via the burner 6, and exhaust gas generated by combustion of the burner 2 is discharged to the outside from an exhaust passage 9 communicating with the combustion chamber 1 above the burner 2.

【0004】上記バーナー2のガス導入口にはガスノズ
ル19が対向配設され、このガスノズル19には燃料ガ
スを導入するためのガス供給通路8が接続されており、
このガス供給通路8により導かれた燃料ガスはガスノズ
ル19を介してバーナー2に供給される。また、上記ガ
ス供給通路8には通路の開閉を行う電磁弁10,11
a,11bと、ガスの供給量を開弁量により制御する比
例弁12とが介設されている。
[0004] A gas nozzle 19 is provided opposite to the gas inlet of the burner 2, and the gas nozzle 19 is connected to a gas supply passage 8 for introducing a fuel gas.
The fuel gas guided by the gas supply passage 8 is supplied to the burner 2 via a gas nozzle 19. The gas supply passage 8 has solenoid valves 10 and 11 for opening and closing the passage.
a, 11b, and a proportional valve 12 for controlling the gas supply amount based on the valve opening amount.

【0005】前記給湯熱交換器3の入側には給水通路1
3の一端側が接続され、給湯熱交換器3の出側には給湯
通路14の一端側が接続されており、上記給水通路13
の他端側は外部配管を介して水供給源に接続され、前記
給湯通路14の他端側は外部配管を介して台所等の所望
の給湯場所に導かれている。また、上記給湯熱交換器3
の入側の給水通路13と出側の給湯通路14を短絡する
常時バイパス通路15とバイパス通路16が設けられて
おり、上記バイパス通路16には通路の開閉を行う電磁
弁17が介設されている。
[0005] A water supply passage 1 is provided on the inlet side of the hot water supply heat exchanger 3.
3 is connected to one end of a hot water supply heat exchanger 3, and one end of a hot water supply passage 14 is connected to the outlet of the hot water supply heat exchanger 3.
Is connected to a water supply source through an external pipe, and the other end of the hot water supply passage 14 is guided to a desired hot water supply place such as a kitchen through the external pipe. The hot water supply heat exchanger 3
A bypass path 15 and a bypass path 16 for short-circuiting the water supply passage 13 on the inlet side and the hot water supply path 14 on the outlet side are provided, and the bypass passage 16 is provided with an electromagnetic valve 17 for opening and closing the passage. I have.

【0006】前記追い焚き熱交換器4の入側には管路1
8の一端側が接続され、この管路18の他端側は循環ポ
ンプ20の吐出口に接続されており、循環ポンプ20の
吸入口には戻り管21の一端側が接続され、戻り管21
の他端側は浴槽22に連接されている。また、追い焚き
熱交換器4の出側には管路23の一端側が接続されてお
り、この管路23の他端側は前記浴槽22に連接されて
いる。上記戻り管21と管路18と追い焚き熱交換器4
と管路23により追い焚き循環通路24が構成される。
A line 1 is provided on the inlet side of the reheater 4.
8 is connected, the other end of the conduit 18 is connected to the discharge port of the circulation pump 20, one end of the return pipe 21 is connected to the suction port of the circulation pump 20, and the return pipe 21
Is connected to the bathtub 22 at the other end. One end of a pipe 23 is connected to the outlet side of the reheater 4, and the other end of the pipe 23 is connected to the bathtub 22. The return pipe 21, the pipe 18, and the reheating heat exchanger 4
And the pipeline 23 constitute a reheating circulation passage 24.

【0007】上記追い焚き循環通路24の管路18と前
記給湯通路14は湯張り通路25により連通されてお
り、この湯張り通路25には通路の開閉を制御する注湯
制御弁26と、浴槽22の水位を水圧により検出する水
位センサ28とが設けられている。
The pipe line 18 of the additional heating circulation passage 24 and the hot water supply passage 14 are communicated by a hot water supply passage 25. The hot water supply passage 25 has a pouring control valve 26 for controlling opening and closing of the passage, and a bathtub. And a water level sensor 28 for detecting the water level of the nozzle 22 by water pressure.

【0008】なお、図中に示す30は燃焼室1内の風量
を検出する風量センサであり、31は給水通路13に設
けられて給水の流量を検出する水量センサであり、32
は給水通路13の水の温度を検出する入水温度センサで
あり、34は給湯通路14に設けられて給湯の流量を制
御する流量制御弁であり、35は給湯通路14に設けら
れて給湯が行われていることを水流により検出する給湯
確認スイッチであり、36は追い焚き循環通路24の水
流を検出する水流センサであり、37は追い焚き循環通
路24の湯水を浴槽湯水の温度(風呂温度)として検出
する風呂温度センサであり、38は追い焚き熱交換器4
で作り出された湯の温度を検出する出湯温度センサであ
る。
Reference numeral 30 shown in the figure is an air volume sensor for detecting the air volume in the combustion chamber 1, 31 is a water volume sensor provided in the water supply passage 13 for detecting the flow rate of the water supply, and 32
Reference numeral 34 denotes a water temperature sensor for detecting the temperature of water in the water supply passage 13, reference numeral 34 denotes a flow control valve provided in the water supply passage 14 to control the flow rate of hot water, and reference numeral 35 denotes a flow control valve provided in the water supply passage 14 to supply hot water. Reference numeral 36 denotes a hot water supply confirmation switch for detecting that water is flowing, a reference numeral 36 denotes a water flow sensor for detecting the flow of water in the reheating circulation passage 24, and reference numeral 37 denotes a temperature (bath temperature) of hot water in the reheating circulation passage 24 in the bathtub. Is a bath temperature sensor which detects as
This is a tapping temperature sensor for detecting the temperature of the tapping water produced in the above.

【0009】この一缶二水路風呂給湯器には制御装置4
0が設けられており、この制御装置40にはリモコン4
1が接続されている。このリモコン41には給湯温度を
設定するための給湯温度設定手段や、浴槽22の風呂の
温度を設定する風呂温度設定手段や、浴槽22の湯水の
水位を設定する風呂水位設定手段や、浴槽22の湯張り
から保温に至るまでの一連の風呂の自動運転を開始させ
るための自動運転ボタン等が設けられている。
[0009] This one-can-two-channel water heater has a control device 4
0 is provided, and the remote controller 4
1 is connected. The remote controller 41 has hot water supply temperature setting means for setting the hot water supply temperature, bath temperature setting means for setting the temperature of the bath in the bathtub 22, bath water level setting means for setting the water level of the hot water in the bathtub 22, and bathtub 22. An automatic operation button or the like is provided for starting a series of automatic operations of the bath from the hot water filling to the heat retention.

【0010】上記制御装置40は各種センサのセンサ出
力信号やリモコン41の情報を取り込み、予め与えられ
ているシーケンスプログラムに従って、給湯運転や、風
呂の自動運転等の各種の運転モードの動作を次のように
制御する。
The control device 40 fetches sensor output signals of various sensors and information of the remote controller 41, and performs operations of various operation modes such as a hot water supply operation and a bath automatic operation in accordance with a given sequence program. Control.

【0011】例えば、台所等に導かれた給湯通路の水栓
が開けられ、水供給源から給水通路13に水が流れ込ん
で水量センサ31が給水通路13の通水を検出すると、
器具は給湯モードの運転を開始する。まず、燃焼ファン
7の回転駆動を開始させ、電磁弁11a,11bの両方
又はどちらか一方と電磁弁10を開動作させガス供給通
路8を通してバーナー2に燃料ガスを供給し、図示され
ていない点着火手段によりバーナー2の点着火を行い燃
焼を開始させる。
For example, when the faucet of the hot water supply passage led to the kitchen or the like is opened, water flows from the water supply source into the water supply passage 13 and the water amount sensor 31 detects the flow of water through the water supply passage 13.
The appliance starts operation in the hot water supply mode. First, the rotational drive of the combustion fan 7 is started to open the solenoid valve 10 and / or one or both of the solenoid valves 11a and 11b, thereby supplying fuel gas to the burner 2 through the gas supply passage 8 to a point not shown. The burner 2 is ignited by the ignition means to start combustion.

【0012】そして、給湯湯温がリモコン41に設定さ
れている給湯設定湯温となるように比例弁12の開弁量
を制御して(バーナー2への供給ガス量を制御して)バ
ーナー2の燃焼熱量を制御し、給湯熱交換器3の通水を
バーナー2の燃焼火炎により加熱して設定温度の湯を作
り出し、この湯を給湯通路14を通して給湯場所に供給
する。
The opening amount of the proportional valve 12 is controlled (by controlling the amount of gas supplied to the burner 2) so that the hot water temperature becomes the hot water setting hot water temperature set in the remote controller 41. The hot water of the hot water supply heat exchanger 3 is heated by the combustion flame of the burner 2 to produce hot water at a set temperature, and this hot water is supplied to the hot water supply place through the hot water supply passage 14.

【0013】湯の使用が終了して水栓が閉められると、
給湯熱交換器3への通水が停止し、水量センサ31が給
水通路13の通水を検知しなくなったときに、電磁弁1
0を閉じてバーナー2の燃焼を停止させる。その後、燃
焼室1内の排気ガスの排出がほぼ終了するポストパージ
期間(例えば、5分間)が経過したときに、燃焼ファン
7の回転駆動を停止して給湯モードの運転を終了し次の
給湯に備える。
When the use of hot water is finished and the faucet is closed,
When the water supply to the hot water supply heat exchanger 3 is stopped and the water amount sensor 31 stops detecting the water supply through the water supply passage 13, the solenoid valve 1
0 is closed to stop the burner 2 from burning. Thereafter, when a post-purge period (for example, 5 minutes) in which the exhaust gas in the combustion chamber 1 is almost completely discharged has elapsed, the rotation drive of the combustion fan 7 is stopped to end the operation in the hot water supply mode, and the next hot water supply is started. Prepare for.

【0014】また、リモコン41の自動運転ボタンによ
り風呂の自動運転が指令されると、図7のフローチャー
トのステップ101に示すように、まず、湯張りモード
の動作が開始される。例えば、注湯制御弁26を開弁
し、この注湯制御弁26の開弁動作により水供給源から
給水通路13に水が流れ込み水量センサ31が給水通路
13の通水を検知すると、上記給湯運転と同様にバーナ
ー2の燃焼を開始させる。
When the automatic operation of the bath is instructed by the automatic operation button of the remote controller 41, the operation of the hot water mode is first started as shown in step 101 of the flowchart of FIG. For example, when the pouring control valve 26 is opened and water flows from the water supply source into the water supply passage 13 by the opening operation of the pouring control valve 26, and the water amount sensor 31 detects the flow of water through the water supply passage 13, the hot water supply The combustion of the burner 2 is started similarly to the operation.

【0015】このバーナー2の燃焼火炎により給湯熱交
換器3で作り出された湯は給湯通路14と湯張り通路2
5を順に介して追い焚き循環通路24に送り込まれ、追
い焚き循環通路24に流れ込んだ湯は戻り管21を通る
経路と追い焚き熱交換器4を通る経路との2経路で浴槽
22に落とし込まれる。水位センサ28が検出する浴槽
22の水位がリモコン41に設定されている設定水位に
達したときに、注湯制御弁26を閉じ、電磁弁10を閉
じてバーナー2の燃焼を停止させ、湯張りモードの動作
を終了する。
Hot water produced in the hot water supply heat exchanger 3 by the combustion flame of the burner 2 is supplied to the hot water supply passage 14 and the hot water supply passage 2.
5, the hot water which has been sent into the reheating circulation passage 24 through the reheating circulation passage 24 is dropped into the bathtub 22 in two paths, a path passing through the return pipe 21 and a path passing through the reheating heat exchanger 4. It is. When the water level in the bathtub 22 detected by the water level sensor 28 reaches the set water level set in the remote controller 41, the pouring control valve 26 is closed, the solenoid valve 10 is closed, and the combustion of the burner 2 is stopped. The mode operation ends.

【0016】この湯張りモードの動作終了後に、図7の
ステップ102に示すように、循環ポンプ20を駆動さ
せ、浴槽22の湯水を追い焚き循環通路24を通して循
環させて浴槽22の湯水を撹拌させ、ステップ103
で、風呂温度センサ37により浴槽22の風呂温度を検
出し、ステップ104で、検出した風呂温度Thが風呂
の設定温度Tsよりも低いか否かを判断し、風呂温度Th
が設定温度Ts よりも低いと判断したときには、ステッ
プ110に進み、追い焚きモードの動作を開始する。
After the operation in the hot water filling mode, as shown in step 102 of FIG. 7, the circulating pump 20 is driven to circulate the hot water in the bath tub 22 through the additional heating circulation passage 24 to stir the hot water in the bath tub 22. , Step 103
Then, the bath temperature of the bathtub 22 is detected by the bath temperature sensor 37, and in step 104, it is determined whether the detected bath temperature Th is lower than the set temperature Ts of the bath, and the bath temperature Th is determined.
Is lower than the set temperature Ts, the routine proceeds to step 110, where the operation in the reheating mode is started.

【0017】例えば、循環ポンプ20の駆動を引き続き
行って、浴槽22内の湯水を追い焚き循環通路24を通
して循環させると共に、バーナー2の燃焼を開始させ、
バーナー2の燃焼火炎により、追い焚き熱交換器4で上
記循環湯水を加熱して追い焚きを行う。風呂温度センサ
37により検出される風呂温度Thが設定温度Tsに達し
たと前記ステップ104で判断したときには、バーナー
2の燃焼を停止させ、追い焚きモードの動作を終了す
る。
For example, by continuing to drive the circulation pump 20, the water in the bathtub 22 is circulated through the reheating boiler circulation passage 24, and the combustion of the burner 2 is started.
With the combustion flame of the burner 2, the circulating hot water is heated by the reheating heat exchanger 4 to perform reheating. When it is determined in step 104 that the bath temperature Th detected by the bath temperature sensor 37 has reached the set temperature Ts, the combustion of the burner 2 is stopped, and the operation in the reheating mode is ended.

【0018】そして、ステップ105に示すように、循
環ポンプ20を停止させると共に、制御装置40に内蔵
されているタイマによる時間計測をスタートさせ、保温
モードの動作を開始する。
Then, as shown in step 105, the circulation pump 20 is stopped, and at the same time, the time measurement by the timer built in the control device 40 is started, and the operation in the warming mode is started.

【0019】例えば、ステップ106に示すように、上
記タイマの計測時間tcが予め定められた設定時間ts
(例えば、30分)に達したか否かを判断する。上記計
測時間tcが設定時間tsに達したと判断したときには、
上記ステップ102からステップ105までの動作を行
い、風呂の温度Thが設定温度Tsよりも低下している場
合には追い焚きを行って風呂の温度Thを設定温度Tsに
保つことができる。
For example, as shown in step 106, the measured time tc of the timer is set to a predetermined set time ts.
(For example, 30 minutes) is determined. When it is determined that the measurement time tc has reached the set time ts,
The operations from step 102 to step 105 are performed. If the bath temperature Th is lower than the set temperature Ts, reheating is performed to maintain the bath temperature Th at the set temperature Ts.

【0020】また、前記ステップ106でタイマの計測
時間tcが設定時間tsに達していないと判断される期間
には、ステップ107,108,109に示す保水モー
ドの動作を行う。
During the period in which it is determined in step 106 that the measured time tc of the timer has not reached the set time ts, the operation in the water retention mode shown in steps 107, 108 and 109 is performed.

【0021】まず、ステップ107で、水位センサ28
のセンサ出力を取り込む。上記水位センサ28は湯張り
通路25内の湯水の水圧を浴槽22の水圧として検出
し、その浴槽水位の水圧をセンサ出力として出力するも
のである。前記制御装置40には水位センサ28が検出
出力するセンサ出力(P)と、浴槽22の水量(Q)と
の関係を表す図8の実線Aに示すようなP−Qデータが
予め求め与えられており、前記水位センサ28のセンサ
出力を上記P−Qデータに参照して浴槽22の水位を検
出する。
First, at step 107, the water level sensor 28
Captures the sensor output of The water level sensor 28 detects the water pressure of the hot water in the hot water passage 25 as the water pressure of the bathtub 22, and outputs the water pressure of the bathtub water level as a sensor output. The controller 40 is given in advance PQ data as shown by the solid line A in FIG. 8 representing the relationship between the sensor output (P) detected and output by the water level sensor 28 and the amount of water (Q) in the bathtub 22. The water level of the bathtub 22 is detected by referring to the sensor output of the water level sensor 28 with the PQ data.

【0022】そして、ステップ108で、上記検出され
た浴槽22の水位Pkが設定水位Psよりも低下している
か否かを判断し、浴槽22の水位Pkが設定水位Psより
も低下していないと判断したときには前記水位センサ2
8による水位検出動作を前記ステップ106以降の動作
により繰り返し行い、また、浴槽22の水位Pkが入浴
者による湯の使用等により設定水位Psよりも低下して
いると判断したときには、ステップ109で、湯張りの
動作を開始して、浴槽22への注湯を行い、浴槽22の
水位Pkを設定水位Psまで上昇させる。
At step 108, it is determined whether or not the detected water level Pk of the bathtub 22 is lower than the set water level Ps. If the water level Pk of the bathtub 22 is not lower than the set water level Ps. When determined, the water level sensor 2
When the water level Pk of the bathtub 22 is determined to be lower than the set water level Ps due to the use of hot water by the bather, the water level detection operation of Step 8 is repeated by the operation of Step 106 and thereafter. The hot water filling operation is started, the hot water is poured into the bathtub 22, and the water level Pk of the bathtub 22 is raised to the set water level Ps.

【0023】上記保水モードの動作は前記タイマの計測
時間tcが設定時間tsになるまで、繰り返し行われる。
The operation in the water retention mode is repeated until the measured time tc of the timer reaches the set time ts.

【0024】上記保水動作を含む保温モードの動作は、
予め定められている期間(例えば、風呂が沸き上がって
から4時間の間)に渡り行われる。
The operation in the heat retaining mode including the water retaining operation is as follows.
This is performed for a predetermined period (for example, for 4 hours after the bath is heated).

【0025】前記の如く、一缶二水路風呂給湯器は、一
体化された給湯熱交換器3と追い焚き熱交換器4を共通
のバーナー2を用いて加熱する方式であるので、別体に
設けられた給湯熱交換器と追い焚き熱交換器をそれぞれ
別個のバーナーを用いて燃焼加熱する方式に比べて、装
置構成の簡易化が図れ、これに伴い、装置の小型化とコ
ストの低減を図れることになる。
As described above, the one-can-two-channel bath water heater uses a system in which the integrated hot water supply heat exchanger 3 and the reheating heat exchanger 4 are heated using the common burner 2, so that they are separately provided. The system configuration can be simplified as compared to the system in which the provided hot water supply heat exchanger and the reheating heat exchanger are each heated and burned by using separate burners, thereby reducing the size and cost of the system. I can plan.

【0026】[0026]

【発明が解決しようとする課題】ところで、一缶二水路
風呂給湯器が追い焚き運転を行わず給湯のみの給湯単独
運転を行うと、給湯単独運転直後等には次のような理由
により正確な浴槽22の水位を得ることができないこと
が出願人らの実験によりわかった。
By the way, when the one-can-two-channel bath water heater performs only the hot water supply operation without performing the reheating operation, the accurate operation immediately after the hot water supply alone operation is performed for the following reasons. It was found by experiments by the applicants that the water level in the bathtub 22 could not be obtained.

【0027】上記給湯単独運転時には追い焚き熱交換器
4内に湯水が滞留している状態にあり、給湯運転のため
にバーナー2を燃焼させると、バーナー2の燃焼火炎に
よって給湯熱交換器3だけでなく追い焚き熱交換器4も
加熱されるので、上記追い焚き熱交換器4内の滞留湯水
は加熱される。このため、追い焚き熱交換器4内の滞留
湯水の温度が上昇し沸騰状態になる。
During the hot water supply operation alone, the hot water stays in the reheating heat exchanger 4. When the burner 2 is burned for the hot water supply operation, only the hot water supply heat exchanger 3 is activated by the combustion flame of the burner 2. However, since the reheating heat exchanger 4 is also heated, the retained hot water in the reheating heat exchanger 4 is heated. For this reason, the temperature of the retained hot water in the reheating heat exchanger 4 rises to a boiling state.

【0028】上記追い焚き熱交換器4内の高温加熱され
た湯水は対流現象により追い焚き熱交換器4の入側の管
路18と出側の管路23の両側へ流れ出て、この追い焚
き熱交換器4から流れ出た高温の湯水の熱により追い焚
き循環通路24や該追い焚き循環通路24に連通する連
通通路である湯張り通路25内の湯水の温度が、例え
ば、70〜80℃と、かなり高温まで上昇する。
The high-temperature heated water in the reheating heat exchanger 4 flows to both sides of the inlet pipe 18 and the outlet pipe 23 of the reheating heat exchanger 4 due to a convection phenomenon. The temperature of the hot water in the hot water circulation passage 24 and the hot water passage 25 which is a communication passage communicating with the hot water circulation channel 24 is, for example, 70 to 80 ° C. due to the heat of the high-temperature hot water flowing out of the heat exchanger 4. Rises to quite high temperatures.

【0029】このように、湯張り通路25内の湯水温度
が高温に上昇することにより、水位センサ28の予め定
められている保証温度範囲(正確な水位検出を保証して
いる水温範囲(例えば、5〜48℃))を越えてしまう
ので、水位センサ28が正確な水圧を検出することがで
きなくなり、図9の(b)に示すように、水位センサ2
8のセンサ出力が、浴槽22の水位が変化していないの
にも拘らず、大きな温度依存性をもって上昇する方向又
は下降する方向にシフトしてしまう。
As described above, when the temperature of the hot water in the hot water passage 25 rises to a high temperature, the predetermined temperature range of the water level sensor 28 (for example, a water temperature range that guarantees accurate water level detection (for example, 5 to 48 ° C.), the water level sensor 28 cannot detect an accurate water pressure, and as shown in FIG.
The sensor output of No. 8 shifts upward or downward with great temperature dependency, despite the fact that the water level in the bathtub 22 has not changed.

【0030】その上、上記の如く、追い焚き熱交換器4
内の高温加熱された湯水が追い焚き熱交換器4の入側の
管路18と出側の管路23の両側へ流れ出ると共に、管
路18と管路23の両側から追い焚き熱交換器4内にぬ
るめの湯水が流れ込む対流が生じるので、この湯水の対
流により追い焚き循環通路24および湯張り通路25内
の湯水に不規則な振動が生じ、この湯張り通路25内の
湯水の不規則な振動により、図9の(b)に示すよう
に、水位センサ28のセンサ出力が不規則に振動する。
In addition, as described above, the reheater 4
The high-temperature heated hot water in the inside flows out to both sides of the pipeline 18 on the inlet side and the pipeline 23 on the outlet side of the reheating heat exchanger 4, and the reheater 4 from both sides of the pipeline 18 and the pipeline 23. A convection in which lukewarm water flows into the inside of the inside of the tank causes irregular vibrations in the hot water circulation passage 24 and the hot water in the hot water passage 25 due to the convection of the hot water, so that the hot water in the hot water passage 25 becomes irregular. Due to the vibration, as shown in FIG. 9B, the sensor output of the water level sensor 28 vibrates irregularly.

【0031】上記のように、給湯単独運転時に追い焚き
熱交換器4内の湯水が高温加熱されることにより、湯張
り通路25内の湯水の温度上昇と不規則振動が相乗的に
関与して水位センサ28のセンサ出力が不規則に変動
し、この水位センサ28のセンサ出力に基づいて浴槽2
2の水位を正確に検出することは困難である。
As described above, when the hot water in the reheating heat exchanger 4 is heated at a high temperature during the hot water supply alone operation, the rise in the temperature of the hot water in the hot water filling passage 25 and the irregular vibration are synergistically involved. The sensor output of the water level sensor 28 fluctuates irregularly, and based on the sensor output of the water level sensor 28, the bathtub 2
It is difficult to accurately detect the second water level.

【0032】上記のように、給湯単独運転に起因して浴
槽22の水位を正確に検出することが困難となり、例え
ば、自動運転の保水モードの運転中に給湯割り込みが行
われて給湯単独運転が行われると、温度が上昇するに従
って水位センサ出力が上昇する場合には浴槽22の水位
よりも高めの水位が検出され、浴槽22の水位が設定水
位よりも低下しているのに保水動作が行われないという
ような誤動作が生じてしまう場合がある。また逆に、水
位センサ出力が温度上昇とともに下がる場合には水位が
低下していないにも拘わらず水位が低下したと捉える場
合がある。
As described above, it becomes difficult to accurately detect the water level in the bathtub 22 due to the hot water supply alone operation. For example, the hot water supply interruption is performed during the automatic water holding mode operation, and the hot water supply alone operation is performed. If the water level sensor output rises as the temperature rises, a water level higher than the water level in the bathtub 22 is detected, and the water retention operation is performed even though the water level in the bathtub 22 is lower than the set water level. In some cases, a malfunction such as not being performed may occur. Conversely, when the output of the water level sensor decreases as the temperature rises, it may be considered that the water level has decreased even though the water level has not decreased.

【0033】本発明は、上記課題を解決するためになさ
れたものであり、その目的は、給湯単独運転に起因した
水位センサ出力の不規則変動により器具が誤動作するの
を防止することができる一缶二水路風呂給湯器を提供す
ることにある。
The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent a malfunction of an appliance due to an irregular fluctuation of a water level sensor output caused by a single operation of hot water supply. An object of the present invention is to provide a two-channel water heater.

【0034】[0034]

【課題を解決するための手段】上記目的を達成するため
にこの発明は次のような構成をもって前記課題を解決す
る手段としている。すなわち、第1の発明は、給水通路
から供給される水を加熱して給湯通路へ送出する給湯熱
交換器と、浴槽湯水の追い焚き循環通路に組み込まれ追
い焚き循環通路を循環する循環湯水の追い焚きを行う追
い焚き熱交換器と、追い焚き循環通路又は追い焚き循環
通路に連通する連通通路に配設され浴槽の湯水の水位を
水圧により検出する水位センサとを備え、上記給湯熱交
換器と追い焚き熱交換器は一体化され、この一体化され
た給湯熱交換器と追い焚き熱交換器を加熱する共通のバ
ーナーが設けられ、予め定められたタイミングで上記水
位センサによる水位検出動作が行われる一缶二水路タイ
プの風呂給湯器において、一缶二水路風呂給湯器が追い
焚き運転を行わず給湯のみの給湯単独運転を行っている
か否かを監視する給湯単独運転監視部と;給湯単独運転
の停止後に予め定めた水位検出停止時間を経過するまで
水位センサによる水位検出動作を停止させる水位検出停
止部と;を設けた構成をもって前記課題を解決する手段
としている。
Means for Solving the Problems To achieve the above object, the present invention has the following structure to solve the above problems. That is, the first invention is a hot water supply heat exchanger that heats water supplied from a water supply passage and sends it out to the hot water supply passage, and a circulating hot water that is incorporated in the bath tub hot water circulation passage and circulates through the reheating circulation passage. A reheating unit for reheating, a water level sensor disposed in a recirculating passage or a communication passage communicating with the recirculation passage and detecting a level of hot water in a bathtub by water pressure; And the reheating heat exchanger are integrated, a common burner for heating the integrated hot water supply heat exchanger and the reheating heat exchanger is provided, and the water level detection operation by the water level sensor is performed at a predetermined timing. In the one-can-two-canal type bath water heater to be performed, the hot-water-supply-only operation monitoring unit monitors whether or not the one-can-two-canal bath water heater performs the hot water-only operation without performing the reheating operation. ; And with a structure in which a is a means to solve the problem; and water level detecting stopping unit stopping the water level detection operation by the water level sensor to the elapsed a predetermined water level detection stop time after stopping the single hot water supply run.

【0035】第2の発明は、上記第1の発明の構成に加
えて、一缶二水路風呂給湯器の給気温を検出する給気温
センサが設けられており、給気温センサが検出する給気
温に基づいて水位検出停止時間を設定する水位検出停止
時間データが与えられ、上記給気温センサが検出する給
気温に応じて水位検出停止時間を可変設定する水位検出
停止時間設定部を設けた構成をもって前記課題を解決す
る手段としている。
According to a second aspect of the invention, in addition to the configuration of the first aspect, a temperature sensor for detecting the temperature of the one-can-two-channel bath water heater is provided. Is provided with water level detection stop time data for setting the water level detection stop time based on the water level detection stop time setting unit that variably sets the water level detection stop time according to the supply air temperature detected by the supply air temperature sensor. This is a means for solving the above problem.

【0036】第3の発明は、上記第1の発明の構成に加
えて、一缶二水路風呂給湯器が給湯単独運転を行ってい
る時間を計測する時間計測手段と;少なくとも給湯単独
運転の燃焼熱量情報と給湯単独運転時間をパラメータと
して給湯単独運転によるバーナーの燃焼熱により追い焚
き熱交換器に与えられる追い焚き熱交換器の保有熱量を
求める保有熱量データが与えられ、該保有熱量データを
求めるための前記給湯単独運転時のパラメータ情報を取
り込んで前記保有熱量データから追い焚き熱交換器の保
有熱量を求め、該保有熱量に応じた水位検出停止時間を
可変設定する水位検出停止時間設定部を設けた構成をも
って前記課題を解決する手段としている。
[0036] In a third aspect of the present invention, in addition to the configuration of the first aspect, a time measuring means for measuring a time during which the one-can-two-channel bath water heater performs the hot-water sole operation; The retained calorie data for obtaining the retained calorie of the reburning heat exchanger given to the reburning heat exchanger by the combustion heat of the burner in the solely hot water supply operation with the calorie information and the hot water single operation time as parameters are given, and the retained calorie data is obtained. A water level detection stop time setting unit that fetches the parameter information at the time of the hot water supply alone operation, obtains the heat quantity of the reheating heat exchanger from the stored heat quantity data, and variably sets a water level detection stop time according to the stored heat quantity. The configuration provided as a means for solving the above-mentioned problem.

【0037】上記構成の発明において、例えば、給湯単
独運転監視部は一缶二水路風呂給湯器が給湯単独運転を
行っているか否かを監視し、この給湯単独運転監視部の
監視情報により給湯単独運転が終了したと検知したとき
から予め定めた水位検出停止時間を経過するまで、水位
検出停止部は水位センサによる水位検出動作を停止させ
る。
In the invention having the above configuration, for example, the hot water supply independent operation monitoring unit monitors whether or not the one-can-two-channel bath water heater is performing the hot water supply independent operation. The water level detection stop unit stops the water level detection operation by the water level sensor until a predetermined water level detection stop time elapses from when it is detected that the operation is completed.

【0038】給湯単独運転により高温になっていた追い
焚き熱交換器の湯水が給湯単独運転の停止後に時間の経
過と共に冷却して湯水の対流が収まり、かつ、追い焚き
循環通路や該追い焚き循環通路に連通する連通通路の湯
水が冷却し水位センサの配設位置の湯水温が水位センサ
の保証温度に低下して水位センサのセンサ出力が安定し
たと判断される期間を時間により予め求め、この求めた
時間を水位検出停止時間として与えることにより、給湯
単独運転後に水位センサのセンサ出力が不規則変動して
いる期間に水位センサによる水位検出動作を停止させる
ことが可能で、このことにより、給湯単独運転に起因し
て不規則変動している水位センサのセンサ出力に基づい
て不正確な浴槽水位が検出されることが回避され、不正
確な検出浴槽水位による器具運転の誤動作が防止され
る。
The hot water of the reheating heat exchanger, which has been heated to a high temperature by the hot water supply alone operation, cools down with the lapse of time after the stop of the hot water supply alone operation, and the convection of the hot water stops. The time period in which the hot / cold water in the communication passage communicating with the passage is cooled, the hot / cold water temperature at the position where the water level sensor is disposed is reduced to the guaranteed temperature of the water level sensor, and the sensor output of the water level sensor is determined to be stable is obtained in advance. By giving the obtained time as the water level detection stop time, it is possible to stop the water level detection operation by the water level sensor during the period when the sensor output of the water level sensor fluctuates irregularly after the hot water supply alone operation. Incorrect bathtub water level is prevented from being detected based on the sensor output of the water level sensor that fluctuates irregularly due to islanding operation, and incorrect bathtub water level detection Malfunction of the device operation can be prevented by.

【0039】[0039]

【発明の実施の形態】以下に、この発明の実施形態例を
図面に基づき説明する。
Embodiments of the present invention will be described below with reference to the drawings.

【0040】第1の実施形態例の一缶二水路風呂給湯器
は前記図6に示すシステム構成を有し、図1にはこの実
施形態例において特徴的な制御構成を示すブロック構成
が実線により表されている。なお、図6に示すシステム
構成は前述したのでその重複説明は省略する。
The one-tank two-channel bath water heater of the first embodiment has the system configuration shown in FIG. 6, and FIG. 1 shows the block configuration showing the characteristic control configuration in this embodiment by solid lines. Is represented. Since the system configuration shown in FIG. 6 has been described above, a duplicate description thereof will be omitted.

【0041】この実施形態例において特徴的な制御装置
40は、図1の実線に示すように、燃焼運転制御部43
と、給湯単独運転監視部44と、データ格納部46と、
タイマ47と、水位検出停止部48とを有して構成され
ている。
As shown by the solid line in FIG. 1, the control device 40 characteristic of this embodiment is a combustion operation control unit 43.
A hot water single operation monitoring unit 44, a data storage unit 46,
It is configured to include a timer 47 and a water level detection stop unit 48.

【0042】上記燃焼運転制御部43には給湯や自動運
転等の各種の運転モードのシーケンスプログラムが予め
定め与えられており、前記シーケンスプログラムに従っ
て各種のセンサ出力やリモコン41の情報等を取り込ん
で、各種の運転モードの動作を行う。
A sequence program of various operation modes such as hot water supply and automatic operation is given to the combustion operation control section 43 in advance, and various sensor outputs, information of the remote controller 41, and the like are taken in according to the sequence program. Performs operation in various operation modes.

【0043】前記給湯単独運転監視部44は、上記燃焼
運転制御部43の運転動作の情報を取り込み、この情報
に基づき、注湯制御弁26が閉状態であり、かつ、水流
センサ36が追い焚き循環通路24内の通水を検知して
おらず、かつ、水量センサ31が給湯通路14内の通水
を検知しているときには、給湯単独運転が行われている
と検知し、それ以外のときには給湯単独運転が行われて
いないと検知して給湯単独運転が行われているか否かを
監視する。
The hot water supply independent operation monitoring unit 44 takes in the operation information of the combustion operation control unit 43, and based on this information, the pouring control valve 26 is closed, and the water flow sensor 36 turns on When the water supply in the circulation passage 24 is not detected and the water amount sensor 31 is detecting the water supply in the hot water supply passage 14, it is detected that the hot water supply alone operation is being performed. It detects that the hot water supply independent operation is not performed, and monitors whether the hot water supply independent operation is performed.

【0044】データ格納部46には水位検出停止時間t
st(例えば、3分)が格納されている。この水位検出停
止時間tstは次のように定められる。
The data storage unit 46 stores the water level detection stop time t.
st (for example, 3 minutes) is stored. The water level detection stop time tst is determined as follows.

【0045】給湯単独運転が停止してバーナー2の燃焼
が停止されると、給湯単独運転により高温に加熱された
追い焚き熱交換器4の湯水が時間の経過と共に冷却し、
この追い焚き熱交換器4の湯水の冷却と共に、追い焚き
熱交換器4の湯水の対流現象が抑制される。また、上記
追い焚き熱交換器4の湯水の冷却と共に追い焚き循環通
路24と湯張り通路25内の湯水温は低下し、水位セン
サ28の配設位置の湯水温が水位センサ28の保証温度
に低下する。上記のように給湯単独運転後に湯水の対流
現象が収まり、かつ、水位センサ28の配設位置の湯水
温が水位センサ28の保証温度に低下することにより、
水位センサ28のセンサ出力が安定して水位センサ28
による正確な浴槽水位検出を行うことが可能となる。こ
のように、給湯単独運転後に水位センサ28のセンサ出
力が安定するまでに要する時間を実験や演算等により求
め、この求めた時間を水位検出停止時間tstと定めてデ
ータ格納部46に格納する。
When the operation of the hot water supply alone is stopped and the combustion of the burner 2 is stopped, the hot water of the reheating heat exchanger 4 which has been heated to a high temperature by the operation of the hot water supply alone is cooled over time,
Along with the cooling of the hot water in the reheating heat exchanger 4, the convection phenomenon of the hot water in the reheating heat exchanger 4 is suppressed. In addition, the temperature of the hot water in the reheating circulation passage 24 and the hot water filling passage 25 decreases with the cooling of the hot water of the reheating heat exchanger 4, and the temperature of the hot water at the position where the water level sensor 28 is disposed becomes the guaranteed temperature of the water level sensor 28. descend. As described above, after the hot water supply alone operation, the convection phenomenon of the hot water stops, and the hot water temperature at the position where the water level sensor 28 is disposed decreases to the guaranteed temperature of the water level sensor 28.
The output of the water level sensor 28 is stable and the water level sensor 28
, It is possible to accurately detect the bathtub water level. In this way, the time required for the sensor output of the water level sensor 28 to stabilize after the hot water supply operation alone is determined by experiments, calculations, and the like, and the determined time is determined as the water level detection stop time tst and stored in the data storage unit 46.

【0046】水位検出停止部48は、前記給湯単独運転
監視部44の監視情報を取り込んで、この情報に基づき
一缶二水路風呂給湯器(器具)が給湯単独運転を開始し
たと検知したときに、給湯単独運転に起因して水位セン
サ28のセンサ出力が不規則変動する虞があると判断し
て水位センサ28による水位検出動作を停止させる水位
検出停止指令信号の出力を開始する。この指令信号は燃
焼運転制御部43に出力され、燃焼運転制御部43は、
湯張りモードや保水モード等の水位センサ28による水
位検出動作を伴う運転モードの運転中に給湯割り込みが
行われて給湯単独運転が行われる場合には、上記水位検
出停止指令信号を受けて、水位センサ28による水位検
出動作を停止する。
The water level detection stop unit 48 takes in the monitoring information of the hot water supply independent operation monitoring unit 44 and, when detecting that the one-can-two-channel bath water heater (apparatus) has started the hot water supply independent operation based on this information. Then, it is determined that the sensor output of the water level sensor 28 may fluctuate irregularly due to the hot water supply alone operation, and the output of the water level detection stop command signal for stopping the water level detection operation by the water level sensor 28 is started. This command signal is output to the combustion operation control unit 43, and the combustion operation control unit 43
When the hot water supply interruption is performed and the hot water supply alone operation is performed during the operation in the operation mode including the water level detection operation by the water level sensor 28 such as the hot water filling mode or the water retention mode, the water level detection stop command signal is received, and the water level is detected. The operation of detecting the water level by the sensor 28 is stopped.

【0047】その後、給湯単独運転が停止すると、上記
水位検出停止部48は、タイマ47をリセット・駆動さ
せ給湯単独運転が停止してからの経過時間の計測を開始
させ、そのタイマ47の計測時間の取り込みを開始する
と共に、上記データ格納部46から上記水位検出停止時
間tstを取り込む。水位検出停止部48は、タイマ47
の計測時間が水位検出停止時間tstに達したときに、つ
まり、給湯単独運転後に水位検出停止時間tstを経過し
たときに、給湯単独運転により不規則に変動していた水
位センサ28のセンサ出力が安定して、水位センサ28
のセンサ出力に基づいて正確な浴槽水位を検出すること
が可能になったと判断して上記水位検出停止指令信号の
燃焼運転制御部43への出力を停止する。
After that, when the hot water supply operation is stopped, the water level detection stop unit 48 resets and drives the timer 47 to start measuring the elapsed time from the stop of the hot water supply operation. And the water level detection stop time tst is fetched from the data storage unit 46. The water level detection stop unit 48 includes a timer 47
When the measured time reaches the water level detection stop time tst, that is, when the water level detection stop time tst elapses after the hot water supply alone operation, the sensor output of the water level sensor 28 that fluctuates irregularly due to the hot water supply alone operation is changed. Stable, water level sensor 28
It is determined that the accurate bathtub water level can be detected based on the sensor output of (1), and the output of the water level detection stop command signal to the combustion operation control unit 43 is stopped.

【0048】なお、上記水位検出停止部48は水位検出
停止信号の出力を停止するときにタイマ47の駆動を停
止・リセットさせ次のタイマ駆動に備えさせてもよい
し、給湯単独運転が停止する度に停止・リセット・駆動
を順に行ってもよい。
When the output of the water level detection stop signal is stopped, the water level detection stop section 48 may stop and reset the driving of the timer 47 to prepare for the next timer driving, or the hot water supply alone operation is stopped. Stop, reset, and drive may be performed in order each time.

【0049】この実施形態例によれば、給湯単独運転監
視部44と水位検出停止部48を設けたので、給湯単独
運転中と、給湯単独運転後に水位検出停止時間tstを経
過するまでの期間に、水位センサ28による水位検出動
作を停止させることができる。上記給湯単独運転中およ
び給湯単独運転後の水位検出停止時間tstの間は、給湯
単独運転により水位センサ28の配設位置の湯水温が保
証温度範囲を越えて高温であり、水位センサ28のセン
サ出力が大きな温度依存性でもってシフトすると共に、
追い焚き熱交換器4の高温加熱の湯水による対流現象の
発生により水位センサ28のセンサ出力が不規則に振動
する虞がある期間であることから、その期間に水位セン
サ28による水位検出動作を停止させることにより、上
記水位センサ28の温度依存性と、追い焚き熱交換器4
内の湯水の対流現象の発生との相乗関与による水位セン
サ28のセンサ出力の不規則変動に起因して不正確な浴
槽水位が検出されるのを防止することができ、この不正
確な浴槽水位に基づいて器具運転が行われ器具が誤動作
するのを確実に回避することができる。
According to this embodiment, since the hot water supply independent operation monitoring unit 44 and the water level detection stop unit 48 are provided, the water supply only operation is performed and the water level detection stop time tst elapses after the hot water supply only operation. The operation of detecting the water level by the water level sensor 28 can be stopped. During the hot water supply alone operation and during the water level detection stop time tst after the hot water supply alone operation, the hot water temperature at the position where the water level sensor 28 is disposed exceeds the guaranteed temperature range due to the hot water supply alone operation, and the sensor of the water level sensor 28 The output shifts with a large temperature dependency,
Since the sensor output of the water level sensor 28 may be irregularly vibrated due to the occurrence of a convection phenomenon due to high-temperature hot water in the reheating heat exchanger 4, the water level detection operation by the water level sensor 28 is stopped during that period. By doing so, the temperature dependency of the water level sensor 28 and the reheating heat exchanger 4
Inaccurate bathtub water level can be prevented from being detected due to irregular fluctuations in the sensor output of the water level sensor 28 due to the synergistic involvement with the occurrence of the convection phenomenon of hot and cold water in the bath. Therefore, it is possible to reliably prevent the appliance from operating and the appliance from malfunctioning.

【0050】以下に、第2の実施形態例を説明する。こ
の実施形態例において特徴的なことは、図6の点線に示
すように、燃焼ファン7の駆動によりバーナー2へ供給
される給気の温度を検出する給気温センサ27を給気通
路6やガスノズル19等に設けると共に、前記第1の実
施形態例に示した制御構成に加えて、図1の点線に示す
ように、給気温に応じて給湯単独運転後の水位検出停止
時間を可変設定する水位検出停止時間設定部である時間
設定部50を設けたことである。データ格納部46と時
間設定部50以外の構成は前記第1の実施形態例と同様
であり、その共通部分の重複説明は省略する。
Hereinafter, a second embodiment will be described. What is characteristic in this embodiment is that, as shown by the dotted line in FIG. 6, the supply air temperature sensor 27 for detecting the temperature of the supply air supplied to the burner 2 by driving the combustion fan 7 is connected to the supply passage 6 and the gas nozzle. 19, and in addition to the control configuration shown in the first embodiment, as shown by the dotted line in FIG. 1, a water level for variably setting the water level detection stop time after the hot water supply alone operation according to the supply air temperature. That is, a time setting unit 50 that is a detection stop time setting unit is provided. The configuration other than the data storage unit 46 and the time setting unit 50 is the same as that of the first embodiment, and the description of the common parts will not be repeated.

【0051】ところで、バーナー2の燃焼が停止した後
には燃焼室1内の排気ガスを排出するために予め定めた
ポストパージ期間に燃焼ファン7の継続駆動を行う。こ
の燃焼ファン7の継続駆動により燃焼室1内には給気の
通風が生じ、このポストパージ期間の通風により、高温
の追い焚き熱交換器4は冷却される。このとき、給気温
が低いと、上記通風が追い焚き熱交換器4から奪う熱量
が多くなり、追い焚き熱交換器4が冷却する速度は早く
なる。反対に、給気温が高いと、上記通風が追い焚き熱
交換器4から奪う熱量は少なくなり、追い焚き熱交換器
4の冷却速度は遅くなる。このように、追い焚き熱交換
器4の冷却速度は給気温毎に異なる。
After the combustion of the burner 2 is stopped, the combustion fan 7 is continuously driven during a predetermined post-purge period in order to discharge the exhaust gas in the combustion chamber 1. Due to the continuous driving of the combustion fan 7, ventilation of supply air is generated in the combustion chamber 1, and the ventilation during the post-purge period cools the high-temperature reburning heat exchanger 4. At this time, if the supply air temperature is low, the amount of heat taken from the reheating heat exchanger 4 by the ventilation increases, and the cooling speed of the reheating heat exchanger 4 increases. Conversely, when the supply air temperature is high, the amount of heat taken from the reheating heat exchanger 4 by the ventilation decreases, and the cooling speed of the reheating heat exchanger 4 decreases. As described above, the cooling rate of the reheating heat exchanger 4 differs for each supply air temperature.

【0052】このため、給湯単独運転後に追い焚き熱交
換器4の冷却と共に追い焚き熱交換器4の湯水の対流現
象が抑制され、かつ、水位センサ28の配設位置の湯水
温が水位センサ28の保証温度に低下して水位センサ2
8のセンサ出力が安定するまでに要する時間は、給気温
が低くなるに従って少なくて済み、反対に、給気温が高
くなるに従って多く必要である。このことから、この実
施形態例では、給気温に応じて水位検出停止時間tstを
可変設定する構成にした。
For this reason, after the hot water supply operation alone, the convection phenomenon of the hot and cold water in the reheating heat exchanger 4 is suppressed together with the cooling of the reheating heat exchanger 4, and the temperature of the hot and cold water at the position where the water level sensor 28 is disposed is controlled by the water level sensor 28. Water temperature sensor 2
The time required for the sensor output 8 to stabilize becomes shorter as the supply air temperature becomes lower, and conversely, it becomes more necessary as the supply air temperature becomes higher. For this reason, in this embodiment, the water level detection stop time tst is variably set in accordance with the supply air temperature.

【0053】データ格納部46には、前記水位検出停止
時間tstが格納されると共に、水位検出停止時間データ
が予め実験や演算等により求めて格納されている。この
ファン駆動延長時間データは、図2の(a)や(b)に
示すように、給気温に対応させて水位検出停止時間が与
えられているもので、給気温が高くなるに従って水位検
出停止時間が連続的又は段階的に長くなっている。
The data storage section 46 stores the water level detection stop time tst and also stores the water level detection stop time data obtained in advance through experiments, calculations, and the like. As shown in FIGS. 2A and 2B, the fan drive extension time data is provided with a water level detection stop time corresponding to the supply air temperature. The time is continuously or gradually increasing.

【0054】時間設定部50は給湯単独運転監視部44
の監視情報を取り込んで、この情報により給湯単独運転
中あるいは給湯単独運転が停止したと検知したときに、
上記データ格納部46の水位検出停止時間データを読み
出すと共に、給気温センサ27が検出出力するセンサ出
力を検出給気温として取り込む。そして、上記給気温セ
ンサ27の検出給気温に対応した水位検出停止時間を前
記水位検出停止時間データから求めて設定し、この設定
した水位検出停止時間をデータ格納部46の水位検出停
止時間tstに上書きする。このように、給湯単独運転が
行われる度に設定される水位検出停止時間tstに基づき
水位検出停止部48は水位検出停止動作の終了タイミン
グを決定する。
The time setting unit 50 is a hot water supply independent operation monitoring unit 44
When the monitoring information of the hot water supply alone operation or the stop of the hot water supply independent operation is detected based on this information,
The water level detection stop time data in the data storage unit 46 is read, and the sensor output detected and output by the air temperature sensor 27 is taken in as the detected air temperature. Then, a water level detection stop time corresponding to the detected supply air temperature of the supply air temperature sensor 27 is obtained from the water level detection stop time data and set, and the set water level detection stop time is used as the water level detection stop time tst of the data storage unit 46. Overwrite. As described above, the water level detection stop unit 48 determines the end timing of the water level detection stop operation based on the water level detection stop time tst set each time the hot water supply alone operation is performed.

【0055】この実施形態例によれば、時間設定部50
を設けて、給気温に応じて水位検出停止時間を可変設定
する構成にしたので、水位検出停止時間tstを給湯単独
運転後に水位センサ28のセンサ出力が安定するまでの
時間に、より正確に合わせることが可能である。このこ
とから、水位検出停止時間tstが長い時間に固定設定さ
れたために給湯単独運転後に水位センサ28のセンサ出
力が安定してから水位センサ28による水位検出動作が
再開されるまでに時間がかかり、器具運転の無駄が生じ
てしまったり、反対に、水位検出停止時間tstが短い時
間に固定設定されたために水位センサ28のセンサ出力
が安定する前に水位センサ28による水位検出動作が再
開され器具が誤動作してしまうという問題を回避するこ
とができる。
According to this embodiment, the time setting section 50
And the water level detection stop time is variably set in accordance with the supply air temperature, so that the water level detection stop time tst is more accurately adjusted to the time until the sensor output of the water level sensor 28 becomes stable after the hot water supply operation alone. It is possible. From this, since the water level detection stop time tst is fixedly set to a long time, it takes time until the water level detection operation by the water level sensor 28 is restarted after the sensor output of the water level sensor 28 is stabilized after the hot water supply alone operation, Since the water level detection stop time tst is fixedly set to a short time, the water level detection operation by the water level sensor 28 is restarted before the sensor output of the water level sensor 28 is stabilized. The problem of erroneous operation can be avoided.

【0056】もちろん、季節等の変化により変動する給
気温の変動範囲はほぼ定まり、その給気温の変動範囲内
では、給湯単独運転後に水位センサ28のセンサ出力が
安定するまでに要する時間は大きく変化しないので、水
位検出停止時間tstを固定した場合に、給気温が季節の
移行等により変化しても、上記固定の水位検出停止時間
tstが給湯単独運転後に水位センサ28のセンサ出力が
安定するまでの時間と大きくかけ離れてしまうことは少
なく、上記のように器具運転の無駄が生じたり、器具が
誤動作してしまうという問題はほぼ回避することができ
る。
Of course, the fluctuation range of the supply air temperature which fluctuates due to the change of the season and the like is substantially determined, and within the fluctuation range of the supply air temperature, the time required until the sensor output of the water level sensor 28 becomes stable after the single operation of the hot water supply is largely changed. Therefore, if the water level detection stop time tst is fixed, and even if the supply air temperature changes due to a change in season or the like, the fixed water level detection stop time tst is maintained until the sensor output of the water level sensor 28 becomes stable after the hot water supply alone operation. It is unlikely that the time is significantly different from the time described above, and the problems of wasteful operation of the appliance and malfunction of the appliance as described above can be substantially avoided.

【0057】以下に、第3の実施形態例を説明する。こ
の実施形態例において特徴的なことは、図3に示すよう
に、時間設定部50と時間計測部51と保有熱量検出部
52を設けて、給湯単独運転により追い焚き熱交換器4
に与えられた保有熱量を求め、該保有熱量に応じて水位
検出停止時間を可変設定する構成にしたことである。そ
れ以外の構成は前記各実施形態例と同様であり、その共
通部分の重複説明は省略する。なお、図3では、前記各
実施形態例に示した燃焼運転制御部43と給湯単独運転
監視部44とタイマ47と水位検出停止部48の図示が
省略されている。
Hereinafter, a third embodiment will be described. The feature of this embodiment is that, as shown in FIG. 3, a time setting unit 50, a time measuring unit 51, and a retained calorific value detecting unit 52 are provided, and the reheater 4
Is obtained, and the water level detection stop time is variably set in accordance with the retained heat quantity. The other configuration is the same as that of each of the above embodiments, and the overlapping description of the common parts will be omitted. In FIG. 3, the illustration of the combustion operation control unit 43, the single hot-water supply operation monitoring unit 44, the timer 47, and the water level detection stop unit 48 shown in each of the above embodiments is omitted.

【0058】時間計測部51は給湯単独運転監視部44
の情報を取り込んで、この情報により給湯単独運転が開
始されてから給湯単独運転が終了するまでの給湯単独運
転時間を計測する構成を有している。
The time measuring unit 51 is a hot water single operation monitoring unit 44
Of the hot water supply alone operation from the start of the hot water supply independent operation to the end of the hot water supply independent operation based on this information.

【0059】データ格納部46には水位検出停止時間t
stが格納されると共に、バーナー2の燃焼により追い焚
き熱交換器4に与えられる追い焚き熱交換器4の保有熱
量を求める保有熱量データが予め実験や演算等により求
め格納されている。上記保有熱量データは、図4に示す
ように、燃焼熱量毎に給湯単独運転時間に対応させて追
い焚き熱交換器4の保有熱量が与えられているもので、
各燃焼熱量のデータとも給湯単独運転の開始時には時間
の経過と共に追い焚き熱交換器4の保有熱量は増加し、
その後、追い焚き熱交換器4の保有熱量は飽和状態とな
る。
The data storage unit 46 stores a water level detection stop time t.
In addition to storing st, stored heat amount data for obtaining the stored heat amount of the reheating heat exchanger 4 to be supplied to the reheating heat exchanger 4 by the combustion of the burner 2 is obtained in advance by experiments, calculations, and the like, and stored. As shown in FIG. 4, the retained calorie data is provided with the retained calorie of the reheating heat exchanger 4 corresponding to the hot water supply alone operation time for each combustion calorie.
With the data of each combustion calorie, the amount of heat possessed by the reheater 4 increases with the passage of time at the start of the hot water supply alone operation,
Thereafter, the amount of heat retained in the reheater 4 becomes saturated.

【0060】保有熱量検出部52は給湯単独運転監視部
44の監視情報を取り込み、この情報により給湯単独運
転が行われていることを検知すると、燃焼運転制御部4
3からバーナー2の燃焼熱量の情報を給湯単独運転の燃
焼熱量情報として取り込んで、上記データ格納部46の
保有熱量データの中からバーナー2の燃焼熱量に対応す
るデータを選択して読み込む。そして、給湯単独運転監
視部44の情報により給湯単独運転が終了したことを検
知すると、前記時間計測部51が計測した給湯単独運転
時間を取り込んで、この給湯単独運転時間を前記読み込
んだ保有熱量データに照らし合わせて給湯単独運転によ
る追い焚き熱交換器4の保有熱量を求め、この求めた保
有熱量に対応する信号を時間設定部50に出力する。
The retained calorie detection unit 52 fetches the monitoring information of the hot water supply independent operation monitoring unit 44, and when it detects that the hot water supply independent operation is being performed based on this information, the combustion operation control unit 4
From 3, information on the amount of combustion heat of the burner 2 is fetched as information on the amount of combustion heat of the single hot water supply operation, and data corresponding to the amount of combustion heat of the burner 2 is selected and read from the stored heat amount data in the data storage unit 46. Then, when it is detected from the information of the hot water single operation monitoring unit 44 that the hot water single operation has been completed, the hot water single operation time measured by the time measuring unit 51 is fetched, and the hot water single operation time is read by the stored calorie data. The amount of retained heat of the reheating heat exchanger 4 by the hot water supply alone operation is determined in view of the above, and a signal corresponding to the determined retained amount of heat is output to the time setting unit 50.

【0061】前記データ格納部46には、さらに、図5
の(a)や(b)に示すような水位検出停止時間データ
が格納されている。上記水位検出停止時間データは給湯
単独運転により追い焚き熱交換器4に与えられた保有熱
量に応じて給湯単独運転後の水位検出停止時間を可変設
定するためのデータで、前記保有熱量に対応させて水位
検出停止時間が与えられている。この実施形態例では、
図5の(a)や(b)に示すように、追い焚き熱交換器
4の保有熱量が多くなるに従って水位検出停止時間が連
続的に又は段階的に長くなるように、水位検出停止時間
データが作成されてデータ格納部46に格納されてい
る。
The data storage section 46 further stores FIG.
The water level detection stop time data as shown in (a) and (b) of FIG. The water level detection stop time data is data for variably setting the water level detection stop time after the hot water supply alone operation according to the retained heat amount given to the reheating heat exchanger 4 by the hot water supply alone operation, and is made to correspond to the retained heat amount. Water level detection stop time. In this embodiment example,
As shown in FIGS. 5A and 5B, the water level detection stop time data is set so that the water level detection stop time increases continuously or stepwise as the amount of heat retained in the reheating heat exchanger 4 increases. Are created and stored in the data storage unit 46.

【0062】それというのは、追い焚き熱交換器4の保
有熱量が多い場合には、給湯単独運転後に追い焚き熱交
換器4が冷却されるのに時間がかかり、追い焚き熱交換
器4の湯水の対流現象が抑制され、かつ、水位センサ2
8の配設位置の湯水温が保証温度に低下して水位センサ
28のセンサ出力が安定するまでに時間が多く必要であ
り、反対に、追い焚き熱交換器4の保有熱量が少ない場
合には、追い焚き熱交換器4が早く冷却されるので、湯
水の対流現象が抑制され、かつ、水位センサ28の配設
位置の湯水温が保証温度になって水位センサ28のセン
サ出力が安定するまでの時間が少なくて済むからであ
る。
That is, when the amount of heat retained in the reheating heat exchanger 4 is large, it takes time for the reheating heat exchanger 4 to be cooled after the hot water supply operation alone, and the reheating heat exchanger 4 The convection phenomenon of hot and cold water is suppressed, and the water level sensor 2
In the case where the temperature of the hot water at the disposition position 8 is lowered to the guaranteed temperature and the sensor output of the water level sensor 28 is stabilized, a long time is required. Since the reheating heat exchanger 4 is quickly cooled, the convection phenomenon of the hot water is suppressed, and the temperature of the hot water at the position where the water level sensor 28 is disposed reaches the guaranteed temperature and the sensor output of the water level sensor 28 becomes stable. This is because less time is required.

【0063】時間設定部50は給湯単独運転監視部44
の監視情報を取り込んで、給湯単独運転が終了したとき
に、データ格納部46から上記水位検出停止時間データ
を読み込み、前記保有熱量検出部52が検出出力した追
い焚き熱交換器4の保有熱量を上記水位検出停止時間デ
ータに参照して水位検出停止時間tstを求め設定する。
この設定された水位検出停止時間tstはデータ格納部4
6の水位検出停止時間tstに上書きされる。水位検出停
止部48は、この設定された水位検出停止時間tstが経
過するまで水位センサ28による水位検出動作を停止さ
せる。
The time setting section 50 is a hot-water supply independent operation monitoring section 44
When the hot water supply alone operation is completed, the water level detection stop time data is read from the data storage unit 46, and the retained heat amount of the reheating heat exchanger 4 detected and output by the retained heat amount detection unit 52 is obtained. The water level detection stop time tst is determined and set with reference to the water level detection stop time data.
The set water level detection stop time tst is stored in the data storage unit 4.
6 is overwritten to the water level detection stop time tst. The water level detection stop unit 48 stops the water level detection operation by the water level sensor 28 until the set water level detection stop time tst elapses.

【0064】この実施形態例によれば、時間計測部51
と保有熱量検出部52を設けたので、給湯単独運転によ
り追い焚き熱交換器4に与えられる保有熱量を求めるこ
とができる。この実施形態例では、上記求めた保有熱量
に応じて水位検出停止時間を可変設定する構成にしたの
で、水位検出停止時間tstを給湯単独運転後に水位セン
サ28の水位センサ出力が安定するまでの時間に、より
正確に合わせることができ、器具運転の無駄や器具運転
の誤動作を防止することができる。
According to this embodiment, the time measuring section 51
And the retained heat amount detection unit 52, the retained heat amount given to the reheating heat exchanger 4 by the hot water supply alone operation can be obtained. In this embodiment, since the water level detection stop time is variably set in accordance with the obtained retained heat quantity, the water level detection stop time tst is set to the time until the water level sensor output of the water level sensor 28 becomes stable after the hot water supply alone operation. Can be adjusted more accurately, and waste of appliance operation and malfunction of appliance operation can be prevented.

【0065】なお、この発明は上記各実施形態例に限定
されるものではなく、様々な実施の形態を採り得る。例
えば、上記第2や第3の実施形態例では、水位検出停止
時間データは、図2や図5に示すように、グラフデータ
のデータ形式で格納されていたが、給気温(第3の実施
形態例では追い焚き熱交換器4の保有熱量)に対応させ
て水位検出停止時間が与えられている表データや、給気
温(保有熱量)をパラメータとして水位検出停止時間を
求める演算式データ等、グラフデータ以外のデータ形式
により水位検出停止時間データを構成しデータ格納部4
6に格納してもよい。
It should be noted that the present invention is not limited to the above embodiments, but can take various embodiments. For example, in the second and third embodiments, the water level detection stop time data is stored in the form of graph data as shown in FIG. 2 and FIG. In the embodiment, table data in which the water level detection stop time is given corresponding to the reheated heat exchanger 4), arithmetic expression data for obtaining the water level detection stop time using the supply air temperature (retained heat) as a parameter, and the like. The data storage unit 4 composes water level detection stop time data in a data format other than the graph data.
6 may be stored.

【0066】また、上記第3の実施形態例では、保有熱
量データは、図4に示すように、グラフデータにより構
成されていたが、表データや演算式データ等のグラフデ
ータ以外のデータ形式で構成してもよい。
Further, in the third embodiment, the retained calorific value data is constituted by graph data as shown in FIG. 4, but the data is in a data format other than the graph data such as table data or arithmetic expression data. You may comprise.

【0067】さらに、上記第3の実施形態例では、保有
熱量検出部52は、燃焼運転制御部43のバーナー2の
燃焼熱量の情報を取り込んで、給湯単独運転中のバーナ
ー2の燃焼熱量を得ていたが、次に示す情報をバーナー
2の燃焼熱量情報として取り込んで給湯単独運転中のバ
ーナー2の燃焼熱量を得てもよい。例えば、燃焼ファン
7の駆動量はバーナー2の燃焼熱量に応じて可変制御さ
れるものなので、燃焼ファン7の駆動量はバーナー2の
燃焼熱量に対応している。このことから、保有熱量検出
部52は燃焼ファン7の駆動量をバーナー2の燃焼熱量
情報として取り込んでもよい。
Further, in the third embodiment described above, the retained calorie detecting section 52 fetches information on the calorific value of the burner 2 of the combustion operation control section 43 to obtain the calorific value of the burner 2 during the hot water supply alone operation. However, the following information may be taken as the combustion heat amount information of the burner 2 to obtain the combustion heat amount of the burner 2 during the hot water supply alone operation. For example, since the drive amount of the combustion fan 7 is variably controlled according to the combustion heat amount of the burner 2, the drive amount of the combustion fan 7 corresponds to the combustion heat amount of the burner 2. For this reason, the retained calorie detection unit 52 may take in the drive amount of the combustion fan 7 as the combustion calorie information of the burner 2.

【0068】また、バーナー2の燃焼熱量はバーナー2
に供給される燃料ガスの供給量により制御しており、こ
の燃焼ガスの供給量は比例弁12の開弁量により制御し
ているので、保有熱量検出部52は比例弁12の開弁量
を制御している比例弁駆動電流をバーナー2の燃焼熱量
情報として取り込んでもよいし、上記比例弁12の開弁
量に応じてガス供給通路8を流れる燃料ガス流量が可変
するので、ガス供給通路8に燃料ガス流量を検出するた
めのフローセンサを設け、保有熱量検出部52は上記フ
ローセンサにより検出される燃焼ガスの流量をバーナー
2の燃焼熱量情報として取り込んでもよい。
The amount of combustion heat of the burner 2 is
Is controlled by the supply amount of the fuel gas supplied to the fuel cell, and the supply amount of the combustion gas is controlled by the opening amount of the proportional valve 12. The controlled proportional valve driving current may be taken in as the combustion heat amount information of the burner 2, or the flow rate of the fuel gas flowing through the gas supply passage 8 varies according to the opening amount of the proportional valve 12. May be provided with a flow sensor for detecting the fuel gas flow rate, and the retained calorie detection unit 52 may take in the flow rate of the combustion gas detected by the flow sensor as combustion calorie information of the burner 2.

【0069】さらに、給湯単独運転中に、入水温度セン
サ32が検出する入水温度Tinと、リモコン41に設定
されている給湯設定温度Tsと、水量センサ31が検出
する入水量Qと、出湯温度センサ38が検出した出湯温
度Toutとをバーナー2の燃焼熱量情報として取り込ん
で、予め与えられている燃焼熱量検出用データ(例え
ば、P=(Ts−Tin)・Q+(Tout−Tin)・Q)に
基づきバーナー2の燃焼熱量Pを保有熱量検出部52が
直接に求めてもよい。さらに、保有熱量検出部52は給
気温センサ27が検出する給気温を考慮して給湯単独運
転中の追い焚き熱交換器4の保有熱量をより正確に求め
るようにしてもよい。
Further, during the hot water supply operation alone, the incoming water temperature Tin detected by the incoming water temperature sensor 32, the hot water supply set temperature Ts set on the remote controller 41, the incoming water amount Q detected by the water amount sensor 31, and the outgoing water temperature sensor The hot water temperature Tout detected by 38 is taken in as combustion heat amount information of the burner 2, and is given to combustion heat amount detection data (for example, P = (Ts−Tin) · Q + (Tout−Tin) · Q). The retained calorie detection unit 52 may directly determine the combustion calorie P of the burner 2 based on the calorific value. Further, the retained heat amount detection unit 52 may determine the retained heat amount of the reheating heat exchanger 4 during the hot water supply alone operation more accurately in consideration of the supply air temperature detected by the supply air temperature sensor 27.

【0070】さらに、上記各実施形態例では、水位検出
停止部48は給湯単独運転が行われている全期間に渡り
水位センサ28による水位検出動作を停止させていた
が、水位検出停止部48は給湯単独運転が行われている
期間のうち予め定めた一部の期間だけ水位センサ28に
よる水位検出動作を停止させるようにしてもよい。
Further, in each of the above embodiments, the water level detection stop unit 48 stops the water level detection operation by the water level sensor 28 during the entire period in which the hot water supply alone operation is performed. The operation of detecting the water level by the water level sensor 28 may be stopped only during a predetermined part of the period in which the hot water supply operation alone is being performed.

【0071】例えば、水位センサ28による水位検出動
作の停止を判断する停止しきい値温度Ts(例えば、水
位センサ28の保証温度の上限値)を予め定めておき、
水位検出停止部48は給湯単独運転中に風呂温度センサ
37が検出する検出温度と上記停止しきい値温度Tsを
比較して風呂温度センサ37の検出温度が停止しきい値
温度Ts以上になったと判断したときに、水位センサ2
8のセンサ出力が不規則に変動し始め、この水位センサ
28のセンサ出力の不規則変動に起因して器具が誤動作
を起こす虞があると判断し、水位センサ28による水位
検出動作を停止させるようにしてもよい。
For example, a stop threshold temperature Ts (for example, an upper limit value of the guaranteed temperature of the water level sensor 28) for judging the stop of the water level detection operation by the water level sensor 28 is determined in advance.
The water level detection stop unit 48 compares the detected temperature detected by the bath temperature sensor 37 during the hot water supply alone operation with the stop threshold temperature Ts, and determines that the detected temperature of the bath temperature sensor 37 has become equal to or higher than the stop threshold temperature Ts. When determined, the water level sensor 2
The sensor output of No. 8 starts to fluctuate irregularly, it is determined that the appliance may malfunction due to the irregular fluctuation of the sensor output of the water level sensor 28, and the water level detection operation by the water level sensor 28 is stopped. It may be.

【0072】それというのは、風呂温度センサ37が配
設されている場所は水位センサ28の配設位置に近く、
風呂温度センサ37が検出する検出湯水温は水位センサ
28の配設位置の湯水温とほぼ等しいと考えられるの
で、給湯単独運転により水位センサ28の配設位置の湯
水温が水位センサ28の保証温度を越えて高温になった
と風呂温度センサ37の検出湯温に 謔闌汳mすることが
可能であり、このように、給湯単独運転により水位セン
サ28の配設位置の湯水温が水位センサ28の保証温度
よりも高温である場合には、追い焚き熱交換器4の湯水
温はより高温で追い焚き熱交換器4の湯水に対流現象が
生じていると考えられるので、水位センサ28の温度依
存性による水位センサ28のセンサ出力シフトと湯水の
対流現象の発生による水位センサ28のセンサ出力の不
規則変動とが相乗的に関与して水位センサ28のセンサ
出力が不規則変動すると判断できるからである。
That is, the place where the bath temperature sensor 37 is disposed is close to the position where the water level sensor 28 is disposed,
Since the detected hot water temperature detected by the bath temperature sensor 37 is considered to be substantially equal to the hot water temperature at the position where the water level sensor 28 is provided, the hot water temperature at the position where the water level sensor 28 is provided by the hot water supply alone operation is the guaranteed temperature of the water level sensor 28. When the temperature rises beyond the threshold, the temperature of the hot water detected by the bath temperature sensor 37 can be reduced. When the temperature is higher than the guaranteed temperature, the temperature of the hot water in the reheating heat exchanger 4 is considered to be higher and the convection phenomenon occurs in the hot water in the reheating heat exchanger 4. The sensor output of the water level sensor 28 varies irregularly due to the synergistic effect of the sensor output shift of the water level sensor 28 due to the nature and the irregular variation of the sensor output of the water level sensor 28 due to the occurrence of the convection phenomenon of hot and cold water. This is because it can be determined that.

【0073】また、給湯単独運転が開始されバーナー2
の燃焼により追い焚き熱交換器4が加熱され始めて水位
センサ28のセンサ出力が不規則に変動し始めると考え
られる、例えば、図5に示す時間tbをしきい値時間と
して予め定めておき、水位検出停止部48は、給湯単独
運転が開始されてから上記しきい値時間tbが経過した
ときに、水位センサ28のセンサ出力が不規則に変動し
始め、この水位センサ28のセンサ出力の不規則変動に
起因して器具が誤動作を起こす虞があると判断し、水位
センサ28による水位検出動作を停止させるようにして
もよい。
In addition, the hot water supply independent operation is started and the burner 2
It is considered that the reburning heat exchanger 4 starts to be heated by the combustion of the water and the sensor output of the water level sensor 28 starts to fluctuate irregularly. For example, the time tb shown in FIG. When the threshold time tb has elapsed since the start of the hot water supply alone operation, the detection stop unit 48 starts to fluctuate the sensor output of the water level sensor 28, and the sensor output of the water level sensor 28 becomes irregular. It may be determined that the appliance may malfunction due to the fluctuation, and the operation of detecting the water level by the water level sensor 28 may be stopped.

【0074】さらに、水位検出停止部48は給湯単独運
転中には水位検出停止動作を行わず、給湯単独運転後に
水位検出停止時間tstが終了するまでの期間だけ、水位
センサ28による水位検出動作を停止させるようにして
もよい。
Further, the water level detection stop section 48 does not perform the water level detection stop operation during the hot water supply alone operation, and performs the water level detection operation by the water level sensor 28 only until the water level detection stop time tst ends after the hot water supply alone operation. You may make it stop.

【0075】さらに、上記各実施形態例は図6に示す器
具を例にして説明したが、この発明は一缶二水路タイプ
の風呂給湯器で、追い焚き循環通路又は追い焚き循環通
路に連通する連通通路に浴槽の水位を水圧により検出す
る水位センサが設けられているものであれば、図6以外
のシステム構成の一缶二水路風呂給湯器にも適用するこ
とができる。例えば、図6に示す湯張り通路25が省略
されて水位センサ28が追い焚き循環通路24に配設さ
れている一缶二水路風呂給湯器にも適用することができ
る。この場合にも、上記各実施形態例同様に水位センサ
28による水位検出動作の停止を行うことにより、給湯
単独運転による追い焚き熱交換器4の滞留湯水の高温加
熱に起因した水位センサ28のセンサ出力の不規則変動
に因る器具の誤動作を防止することができる。
Further, in each of the above embodiments, the appliance shown in FIG. 6 has been described as an example. However, the present invention is a one-can-two-channel type bath water heater, which communicates with a reheating circulation path or a reheating circulation path. As long as the water level sensor that detects the water level of the bathtub in the communication passage by the water pressure is provided, the present invention can also be applied to a one-can-two-channel water heater with a system configuration other than FIG. For example, the present invention can also be applied to a one-can-two-channel bath water heater in which the hot water path 25 shown in FIG. 6 is omitted and the water level sensor 28 is disposed in the reheating circulation path 24. In this case as well, by stopping the water level detection operation by the water level sensor 28 in the same manner as in each of the above embodiments, the sensor of the water level sensor 28 caused by the high temperature heating of the retained hot water in the reheating heat exchanger 4 by the hot water supply alone operation. It is possible to prevent the malfunction of the appliance due to the irregular fluctuation of the output.

【0076】[0076]

【発明の効果】この発明によれば、給湯単独運転監視部
と水位検出停止部を設けたので、給湯単独運転後に予め
定めた水位検出停止時間を経過するまで、上記水位検出
停止部により水位センサによる浴槽水位検出動作を停止
させることができる。
According to the present invention, since the hot water supply independent operation monitoring section and the water level detection stop section are provided, the water level detection stop section controls the water level detection until the predetermined water level detection stop time elapses after the hot water supply alone operation. Can stop the bathtub water level detection operation.

【0077】給湯単独運転時の追い焚き熱交換器の高温
加熱に起因して水位センサのセンサ出力が不規則に変動
すると判断される給湯単独運転後の期間を水位検出停止
時間として設定することにより、上記給湯単独運転によ
り水位センサのセンサ出力が不規則に変動する給湯単独
運転後の期間は水位センサによる水位検出動作は停止さ
れるので、上記不規則変動している水位センサ出力に基
づき不正確な浴槽水位が検出され、該不正確な浴槽水位
に基づいて器具運転が行われて器具が誤動作するという
問題を回避することができる。
By setting a period after the hot water supply operation alone in which the sensor output of the water level sensor is determined to fluctuate irregularly due to the high temperature heating of the reheating heat exchanger during the hot water supply operation alone, as a water level detection stop time. However, since the sensor output of the water level sensor fluctuates irregularly due to the hot water supply alone operation, the water level detection operation by the water level sensor is stopped during the period after the hot water supply alone operation. It is possible to avoid a problem that an inappropriate bathtub water level is detected, the appliance is operated based on the incorrect bathtub water level, and the appliance malfunctions.

【0078】上記水位検出停止時間を可変設定する水位
検出停止時間設定部を設けた発明にあっては、給湯単独
運転に起因して不規則変動していた水位センサのセンサ
出力が給湯単独運転後に安定するまでの期間を決定する
給気温、あるいは、追い焚き熱交換器の保有熱量に応じ
て、水位検出停止時間を可変設定することができるの
で、水位検出停止時間を水位センサのセンサ出力が安定
するまでの期間に、より正確に合わせることができる。
In the invention in which the water level detection stop time setting section for variably setting the water level detection stop time is provided, the sensor output of the water level sensor irregularly fluctuating due to the hot water supply alone operation is changed after the hot water supply alone operation. The water level detection stop time can be variably set according to the supply air temperature that determines the period until stabilization or the amount of heat held by the reheating heat exchanger. It can be adjusted more accurately to the period before.

【0079】このことにより、次のような問題を回避す
ることが可能である。例えば、水位検出停止時間を長い
一定時間に設定したために、給湯単独運転後に水位セン
サのセンサ出力が安定してから水位検出停止時間が終了
するまでに時間がかかり、器具運転の無駄が生じたり、
反対に、水位検出停止時間を短い一定時間に設定したた
めに、水位センサのセンサ出力が安定する前に水位検出
停止時間が終了してしまい、水位センサの不規則変動し
ているセンサ出力により器具が誤動作してしまうという
問題が生じるが、上記のように、給湯単独運転後に水位
センサのセンサ出力が安定するまでの期間に合うように
水位検出停止時間を可変設定することにより、上記のよ
うな器具運転の無駄や器具の誤動作を回避することが可
能である。
As a result, the following problem can be avoided. For example, because the water level detection stop time is set to a long constant time, it takes time until the water level detection stop time ends after the sensor output of the water level sensor is stabilized after the hot water supply alone operation, or wasteful appliance operation occurs,
Conversely, since the water level detection stop time is set to a short fixed time, the water level detection stop time ends before the sensor output of the water level sensor stabilizes, and the appliance is caused by the irregularly varying sensor output of the water level sensor. Although the problem of erroneous operation occurs, as described above, the water level detection stop time is variably set to match the period until the sensor output of the water level sensor becomes stable after the single operation of hot water supply, so that the appliance operation as described above is performed. It is possible to avoid waste and malfunction of the appliance.

【図面の簡単な説明】[Brief description of the drawings]

【図1】第1と第2の実施形態例を示すブロック構成図
である。
FIG. 1 is a block diagram showing first and second embodiments.

【図2】給気温に対応させて水位検出停止時間が与えら
れている水位検出停止時間データの一例を示すグラフで
ある。
FIG. 2 is a graph showing an example of water level detection stop time data in which a water level detection stop time is given in accordance with a supply air temperature.

【図3】第3の実施形態例において特徴的な制御構成部
分を抜き出して示したブロック構成図である。
FIG. 3 is a block diagram showing a control configuration portion characteristic of the third embodiment.

【図4】給湯単独運転により追い焚き熱交換器に与えら
れる追い焚き熱交換器の保有熱量の時間的変化の一例を
燃焼熱量毎に示すグラフである。
FIG. 4 is a graph showing an example of a temporal change in the amount of heat retained by the reheating heat exchanger given to the reheating heat exchanger by the hot water supply alone operation for each combustion heat amount.

【図5】追い焚き熱交換器の保有熱量に応じて水位検出
停止時間が与えられている水位検出停止時間データの一
例を示すグラフである。
FIG. 5 is a graph showing an example of water level detection stop time data in which a water level detection stop time is given according to the amount of heat held by the reheating heat exchanger.

【図6】一缶二水路風呂給湯器のシステム構成例を示す
説明図である。
FIG. 6 is an explanatory diagram showing an example of a system configuration of a one-can two-channel bath water heater.

【図7】自動運転動作の一例を示すフローチャートであ
る。
FIG. 7 is a flowchart illustrating an example of an automatic driving operation.

【図8】水位センサのセンサ出力と浴槽水量の関係を示
すP−Qデータの一例を示すグラフである。
FIG. 8 is a graph showing an example of PQ data indicating a relationship between a sensor output of a water level sensor and a bathtub water amount.

【図9】従来の課題を示す説明図である。FIG. 9 is an explanatory diagram showing a conventional problem.

【符号の説明】[Explanation of symbols]

2 バーナー 3 給湯熱交換器 4 追い焚き熱交換器 13 給水通路 14 給湯通路 24 追い焚き循環通路 25 湯張り通路 28 水位センサ 44 給湯単独運転監視部 48 水位検出停止部 50 時間設定部 51 時間計測部 2 Burner 3 Hot water supply heat exchanger 4 Reheating heat exchanger 13 Water supply passage 14 Hot water supply passage 24 Reheating heating circulation passage 25 Filling passage 28 Water level sensor 44 Hot water supply independent operation monitoring unit 48 Water level detection stop unit 50 Time setting unit 51 Time measurement unit

───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 健生 神奈川県大和市深見台3丁目4番地 株式 会社ガスター内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takeo Yamaguchi 3-4 Fukamidai, Yamato City, Kanagawa Prefecture Inside Gaster Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 給水通路から供給される水を加熱して給
湯通路へ送出する給湯熱交換器と、浴槽湯水の追い焚き
循環通路に組み込まれ追い焚き循環通路を循環する循環
湯水の追い焚きを行う追い焚き熱交換器と、追い焚き循
環通路又は追い焚き循環通路に連通する連通通路に配設
され浴槽の湯水の水位を水圧により検出する水位センサ
とを備え、上記給湯熱交換器と追い焚き熱交換器は一体
化され、この一体化された給湯熱交換器と追い焚き熱交
換器を加熱する共通のバーナーが設けられ、予め定めら
れたタイミングで上記水位センサによる水位検出動作が
行われる一缶二水路タイプの風呂給湯器において、一缶
二水路風呂給湯器が追い焚き運転を行わず給湯のみの給
湯単独運転を行っているか否かを監視する給湯単独運転
監視部と;給湯単独運転の停止後に予め定めた水位検出
停止時間を経過するまで水位センサによる水位検出動作
を停止させる水位検出停止部と;を設けたことを特徴と
する一缶二水路風呂給湯器。
1. A hot water supply heat exchanger for heating water supplied from a water supply passage and sending it out to the hot water supply passage, and a reheating of circulating hot water incorporated in the reheating circulation passage of the bathtub hot water and circulating in the reheating circulation passage. A reheating steam exchanger to be performed, and a water level sensor disposed in the reheating steam circulation passage or a communication passage communicating with the reheating heating circulation passage and detecting a water level of hot water in a bathtub by a water pressure, and the above-described hot water supply heat exchanger and reheating. The heat exchanger is integrated, a common burner for heating the integrated hot water supply heat exchanger and the reheating heat exchanger is provided, and a water level detection operation by the water level sensor is performed at a predetermined timing. A single-water two-channel type bath water heater, a single-water two-channel bath water heater that does not perform a reheating operation and performs a hot-water-only operation alone; A water level detection stop unit for stopping a water level detection operation by a water level sensor until a predetermined water level detection stop time elapses after the operation is stopped; and a one-can-two-channel bath water heater.
【請求項2】 一缶二水路風呂給湯器の給気温を検出す
る給気温センサが設けられており、給気温センサが検出
する給気温に基づいて水位検出停止時間を設定する水位
検出停止時間データが与えられ、上記給気温センサが検
出する給気温に応じて水位検出停止時間を可変設定する
水位検出停止時間設定部を設けたことを特徴とする請求
項1記載の一缶二水路風呂給湯器。
2. A water level detection stop time data for setting a water level detection stop time based on a supply air temperature detected by the one-water two-channel bath water heater. And a water level detection stop time setting unit for variably setting a water level detection stop time in accordance with a supply air temperature detected by the supply air temperature sensor. .
【請求項3】 一缶二水路風呂給湯器が給湯単独運転を
行っている時間を計測する時間計測手段と;少なくとも
給湯単独運転の燃焼熱量情報と給湯単独運転時間をパラ
メータとして給湯単独運転によるバーナーの燃焼熱によ
り追い焚き熱交換器に与えられる追い焚き熱交換器の保
有熱量を求める保有熱量データが与えられ、該保有熱量
データを求めるための前記給湯単独運転時のパラメータ
情報を取り込んで前記保有熱量データから追い焚き熱交
換器の保有熱量を求め、該保有熱量に応じた水位検出停
止時間を可変設定する水位検出停止時間設定部を設けた
ことを特徴とする請求項1記載の一缶二水路風呂給湯
器。
3. A time measuring means for measuring a time during which the one-can-two-channel bath water heater is performing the hot-water-only operation; The retained calorie data for determining the retained calorie of the reheater provided to the recuperating heat exchanger by the combustion heat of the heat exchanger is given, and the parameter information at the time of the hot water supply alone operation for determining the retained calorie data is taken in and the retained value is obtained. 2. A canister according to claim 1, further comprising a water level detection stop time setting section for obtaining the heat quantity of the reheating heat exchanger from the heat quantity data and variably setting the water level detection stop time according to the heat quantity. Water bath water heater.
JP32786696A 1996-11-22 1996-11-22 One can two water bath hot water heater Expired - Lifetime JP3776997B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP32786696A JP3776997B2 (en) 1996-11-22 1996-11-22 One can two water bath hot water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP32786696A JP3776997B2 (en) 1996-11-22 1996-11-22 One can two water bath hot water heater

Publications (2)

Publication Number Publication Date
JPH10160246A true JPH10160246A (en) 1998-06-19
JP3776997B2 JP3776997B2 (en) 2006-05-24

Family

ID=18203857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP32786696A Expired - Lifetime JP3776997B2 (en) 1996-11-22 1996-11-22 One can two water bath hot water heater

Country Status (1)

Country Link
JP (1) JP3776997B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021139565A (en) * 2020-03-06 2021-09-16 株式会社コロナ Bath hot water supply device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021139565A (en) * 2020-03-06 2021-09-16 株式会社コロナ Bath hot water supply device

Also Published As

Publication number Publication date
JP3776997B2 (en) 2006-05-24

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