JP2022124836A - Water heater with immediate boiling function - Google Patents

Water heater with immediate boiling function Download PDF

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JP2022124836A
JP2022124836A JP2021022707A JP2021022707A JP2022124836A JP 2022124836 A JP2022124836 A JP 2022124836A JP 2021022707 A JP2021022707 A JP 2021022707A JP 2021022707 A JP2021022707 A JP 2021022707A JP 2022124836 A JP2022124836 A JP 2022124836A
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hot water
temperature
water supply
circulation path
detection means
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JP7456956B2 (en
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順也 綿貫
Junya Watanuki
拓馬 柄澤
Takuma Karasawa
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Corona Corp
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Abstract

To provide a water heater with immediate boiling function which improves hot water pouring characteristics.SOLUTION: A water heater with immediate boiling function comprises: hot water pouring detection means 25 for detecting the presence and absence of hot water pouring from a hot water tap 35; circulation path detection means 30 for detecting the presence and absence of circulation of hot water in a circulation path 34; and a temperature table 83 determining a correspondence between a preset temperature and a target can body temperature. A control unit 80 controls burning of a burner 13 to make the temperature the target can body temperature determined by the temperature table 83. The temperature table 83 includes a first temperature table 81 and a second temperature table 82 which is set at a higher temperature than that of the first temperature table 81. Among four combinations of the presence and absence of the detection in the hot water pouring detection means 25 and the presence and absence of the detection in the circulation path detection means 30, in the case of a combination of the absence of the detection in the hot water pouring detection means 25 and the presence of the detection in the circulation path detection means 30, the control unit 80 performs the control on the basis of the second temperature table 82 and in the other case, performs the control on the basis of the first temperature table 81.SELECTED DRAWING: Figure 1

Description

本発明は家庭用の給湯機に関し、特に循環路を設け温水を直ちに出湯させることができる即湯機能付き給湯機に関するものである。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater for home use, and more particularly to a water heater with a quick hot water function which is provided with a circulation path and can immediately supply hot water.

従来、ミキシング弁を備えていない即湯機能付き給湯機としては、図8に示すように缶体110に設けた給水口122に給水管111が接続され、缶体110に設けた温水出口123と温水戻り口124の間にポンプ136と給湯逆止弁137を備えた循環路134が接続され、循環路134に給湯栓135が設けられている。
さらに、缶体110に設けた缶体温度センサ121の値に基づいて熱源機であるバーナ113の燃焼を制御して、リモコン190で設定した温度の温水を循環路134に循環させることができる。
これにより、給湯栓135を開栓すると、直ちに温水を出湯させることができるものである。
即湯機能付きの給湯機として、例えば特許文献1があった。
Conventionally, as a hot water heater with a hot water function without a mixing valve, as shown in FIG. A circulation path 134 having a pump 136 and a hot water check valve 137 is connected between the hot water return port 124 , and a hot water tap 135 is provided in the circulation path 134 .
Furthermore, it is possible to control the combustion of the burner 113 as a heat source based on the value of the body temperature sensor 121 provided in the body 110 and circulate hot water at a temperature set by the remote controller 190 through the circulation path 134 .
As a result, when the hot water supply valve 135 is opened, hot water can be supplied immediately.
As a water heater with an instant hot water function, there is, for example, Patent Document 1.

特開2000-88267号公報JP-A-2000-88267

ところで、通常の出湯時の運転では、ポンプ136を停止した状態で給湯栓135を開栓すると、給水管111からの水が給水口122を経て缶体110内部に流入し、バーナ113の燃焼によって暖められ、リモコン190で設定した設定温度の湯温で給湯栓135から出湯できるように、缶体温度センサ121で計測される温度が缶体110内部の高さ方向の温度勾配を踏まえた目標缶体温度になるよう前記バーナ113の燃焼を制御するものである。 By the way, in normal hot water operation, when the hot water tap 135 is opened with the pump 136 stopped, water from the water supply pipe 111 flows into the boiler 110 through the water supply port 122, and the burner 113 burns. The temperature measured by the can body temperature sensor 121 is adjusted to a target can temperature based on the temperature gradient in the height direction inside the can body 110 so that hot water can be discharged from the hot water tap 135 at the set temperature set by the remote control 190. Combustion of the burner 113 is controlled so as to reach the body temperature.

これに対し、即湯運転では、給湯栓135が閉止された状態で、ポンプ136を駆動することにより、循環路134に温水を循環させることができる。
しかしながら、温水戻り口124から缶体110内部に流入してくる温水の温度は、給水口122から缶体110内部に流入する水の温度に比べ非常に高く、缶体温度センサ121付近は目標缶体温度に近い温度になり、バーナ113の燃焼が停止し、温水出口123付近の温水の温度が相対的に下がり、循環路134を流れる温水の温度は前記設定温度より低くなる。
その結果、即湯運転後に給湯栓135を開栓すると、給湯栓135から出る温水の温度は前記設定温度より低くなってしまい、快適性が損なわれるという課題があった。
On the other hand, in the instant hot water operation, hot water can be circulated in the circulation path 134 by driving the pump 136 with the hot water tap 135 closed.
However, the temperature of the hot water flowing into the can body 110 from the hot water return port 124 is much higher than the temperature of the water flowing into the can body 110 from the water supply port 122. The temperature becomes close to the body temperature, the burner 113 stops burning, the temperature of the hot water near the hot water outlet 123 relatively drops, and the temperature of the hot water flowing through the circulation path 134 becomes lower than the set temperature.
As a result, when the hot water tap 135 is opened after the instant hot water operation, the temperature of the hot water coming out of the hot water tap 135 becomes lower than the set temperature, which impairs comfort.

また、ミキシング弁付きの即湯機能付き給湯機としては、図9に示すように循環路134にミキシング弁126と、給水管111から分岐してミキシング弁126に接続するバイパス管129とが備わる。 As a water heater with a hot water function and a mixing valve, as shown in FIG.

ミキシング弁付きの即湯機能付き給湯機の場合、通常の出湯時の運転では、ポンプ136を停止した状態で給湯栓135を開栓すると、給水管111からの水が給水口122を経て缶体110内部に流入し、バーナ113の燃焼によって沸き上げられ、具体的には、缶体温度センサ121で約50℃、温水出口123付近では約55℃に暖められ、ミキシング弁126でバイパス管129からの水と混合し調整され、リモコン190で設定した設定温度の湯温で給湯栓135から出湯できるよう制御するものである。 In the case of a water heater with a quick hot water function with a mixing valve, when the hot water supply valve 135 is opened with the pump 136 stopped, water from the water supply pipe 111 flows through the water supply port 122 in normal hot water supply operation. It flows into the inside of 110 and is boiled by combustion of burner 113. Specifically, it is heated to about 50° C. by boiler body temperature sensor 121 and to about 55° C. near hot water outlet 123. It is controlled to supply hot water from the hot water tap 135 at the hot water temperature set by the remote control 190.

これに対し、即湯運転では、給湯栓135が閉止された状態で、ポンプ136を駆動することにより、循環路134に温水を循環させることができる。
しかしながら、温水戻り口124から缶体110内部に流入してくる温水の温度は、給水口122からの水温に比べ非常に高く、缶体温度センサ121付近は目標缶体温度に近い温度になり、バーナ113の燃焼が停止し、温水出口123付近の温水の温度は沸き上げ温度からは下がるものの、リモコン190で設定した前記設定温度よりは高いままであり、シャワーなどの給湯栓135の開栓時に高温の湯が出湯されてしまい、快適性が損なわれるという課題があった。
On the other hand, in the instant hot water operation, hot water can be circulated in the circulation path 134 by driving the pump 136 with the hot water tap 135 closed.
However, the temperature of the hot water flowing into the can body 110 from the hot water return port 124 is much higher than the water temperature from the water supply port 122, and the temperature near the can body temperature sensor 121 is close to the target body temperature. Burner 113 stops burning, and although the temperature of hot water near hot water outlet 123 drops from the boiling temperature, it remains higher than the set temperature set by remote controller 190. There was a problem that hot water was discharged and comfort was impaired.

このように、ミキシング弁を備えていない即湯機能付き給湯機の従来例とミキシング弁付きの即湯機能付き給湯機の従来例は、いずれも即湯運転を停止して給湯栓を開栓し給湯した際に、使用者が前記リモコンで設定した設定温度とは異なる温度の温水が出湯され、快適性が損なわれるという課題があった。 In this way, in both the conventional example of a hot water heater with a quick hot water function without a mixing valve and the conventional example of a hot water heater with a quick hot water function with a mixing valve, the quick hot water operation is stopped and the hot water tap is opened. When hot water is supplied, hot water is discharged at a temperature different from the set temperature set by the user using the remote control, and there is a problem that comfort is impaired.

本発明はかかる背景を鑑みてなされたものであり、即湯機能をもちつつ出湯特性を改善させることのできる商品を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and it is an object of the present invention to provide a product capable of improving hot water discharge characteristics while having a function of instant hot water.

本発明は上記目的を達成するためになされたものであり、請求項1では、温水を貯湯する缶体と、前記缶体を加熱するバーナと、前記缶体の温度を計測する缶体温度センサと、前記缶体に設けた給水口と、前記給水口に接続された給水管と、前記給水管の途中に設けられた減圧弁と、前記缶体に設けた温水出口と、前記缶体または前記給水管に設けた温水戻り口と、前記温水出口と前記温水戻り口の間にポンプと給湯逆止弁とを備えた循環路と、前記循環路の途中に設けられた給湯栓と、前記給湯栓の出湯の有無を検出する出湯検出手段と、前記循環路の温水の流れの有無を検出する循環路検出手段と、前記バーナの燃焼制御を行う制御部と、前記制御部と通信可能に接続されたリモコンと、を備え、前記制御部は、前記リモコンで設定した設定温度と目標缶体温度との対応関係を定めた温度テーブルを備え、さらに、前記設定温度に設定されたとき、前記缶体温度センサで検出する前記缶体内の温水の温度が、前記温度テーブルに基づいて定められる前記目標缶体温度になるよう前記バーナの燃焼を制御し、前記温度テーブルは、第1温度テーブルと、前記第1温度テーブルより前記目標缶体温度が高温に設定された第2温度テーブルを備え、前記制御部は、前記出湯検出手段の検出有無と前記循環路検出手段の検出有無の4つの組み合わせのうち、前記出湯検出手段が検出無で、前記循環路検出手段の検出有の組み合わせの場合は、前記第2温度テーブルに基づいて前記バーナの燃焼を制御し、他の組み合わせの場合は、前記第1温度テーブルに基づいて前記バーナの燃焼を制御することを特徴とした。 SUMMARY OF THE INVENTION The present invention has been made to achieve the above objects. a water supply port provided in the can body, a water supply pipe connected to the water supply port, a pressure reducing valve provided in the middle of the water supply pipe, a hot water outlet provided in the can body, the can body or a hot water return port provided in the water supply pipe; a circulation path provided with a pump and a hot water supply check valve between the hot water outlet and the hot water return port; a hot water supply valve provided in the middle of the circulation path; hot water detection means for detecting whether or not hot water is discharged from a hot water tap; circulation path detection means for detecting whether or not hot water flows in said circulation path; control section for controlling combustion of said burner; and communication with said control section. a connected remote controller, wherein the control unit includes a temperature table defining a correspondence relationship between a set temperature set by the remote controller and a target can body temperature, and further, when the set temperature is set, the Combustion of the burner is controlled so that the temperature of hot water in the can body detected by the can body temperature sensor reaches the target body temperature determined based on the temperature table, and the temperature table is a first temperature table. a second temperature table in which the target boil body temperature is set higher than the first temperature table; Of these, in the case of a combination in which the outlet hot water detecting means does not detect and the circulation path detecting means does detect, the combustion of the burner is controlled based on the second temperature table. Combustion of the burner is controlled based on the first temperature table.

請求項2では、温水を貯湯する缶体と、前記缶体を加熱するバーナと、前記缶体の温度を計測する缶体温度センサと、前記缶体に設けた給水口と、前記給水口に接続された給水管と、前記給水管の途中に設けられた減圧弁と給水逆止弁と、前記缶体に設けた温水出口と、前記缶体に設けた温水戻り口と、前記温水出口と前記温水戻り口の間にポンプと給湯逆止弁とを備えた循環路と、前記循環路の途中に設けられた給湯栓と、前記給湯栓の出湯の有無を検出する出湯検出手段と、前記循環路の温水の流れの有無を検出する循環路検出手段と、前記循環路の途中で前記給湯栓より上流に設けた給湯温度センサを備えるミキシング弁と、前記給水管から分岐して前記ミキシング弁と接続するバイパス管と、前記バーナの燃焼制御と前記給湯温度センサにて前記ミキシング弁の制御を行う制御部と、前記制御部と通信可能に接続されたリモコンと、を備え、前記制御部は、前記出湯検出手段の検出有無と前記循環路検出手段の検出有無の4つの組み合わせのうち、前記出湯検出手段が検出無で、前記循環路検出手段の検出有の組み合わせの場合は、前記ミキシング弁は前記循環路側を全開とし前記バイパス管側を閉止して、前記給湯温度センサの温度が前記リモコンで設定した設定温度になるよう前記バーナを制御し、他の組み合わせの場合は、前記缶体温度センサで検出する前記缶体内の温水の温度が前記リモコンで設定した前記設定温度より高い所定の目標缶体温度になるよう前記バーナを制御し、前記ミキシング弁にて前記給湯温度センサの温度が前記リモコンで設定した前記設定温度になるよう制御することを特徴とした。 In claim 2, a can body for storing hot water, a burner for heating the can body, a can body temperature sensor for measuring the temperature of the can body, a water supply port provided in the can body, and A connected water supply pipe, a pressure reducing valve and a water supply check valve provided in the middle of the water supply pipe, a hot water outlet provided in the can body, a hot water return port provided in the can body, and the hot water outlet. a circulation path having a pump and a hot water supply check valve between the hot water return port; a hot water tap provided in the middle of the circulation path; Circulating path detection means for detecting the presence or absence of flow of hot water in the circulating path; a mixing valve provided with a hot water temperature sensor provided upstream of the hot water tap in the middle of the circulating path; and the mixing valve branched from the water supply pipe. a control unit for controlling combustion of the burner and the mixing valve by the hot water supply temperature sensor; and a remote controller communicably connected to the control unit, wherein the control unit comprises , among the four combinations of presence/absence of detection by said outlet hot water detection means and presence/absence of detection by said circulation path detection means, in the case of a combination of no detection by said outlet water detection means and presence of detection by said circulation path detection means, said mixing valve controls the burner so that the temperature of the hot water supply temperature sensor reaches the set temperature set by the remote controller by fully opening the circulation path side and closing the bypass pipe side; The burner is controlled so that the temperature of the hot water in the boiler detected by the sensor reaches a predetermined target boiler temperature higher than the set temperature set by the remote control, and the temperature of the hot water supply temperature sensor is adjusted by the mixing valve. It is characterized in that the temperature is controlled so as to reach the set temperature set by the remote controller.

本発明の請求項1によれば、前記出湯検出手段が検出無で前記循環路検出手段が検出有の場合に、前記制御部は前記第1温度テーブルより前記缶体温度が高温に設定された前記第2温度テーブルに基づいて前記バーナの燃焼を制御するので、缶体上部の前記温水出口の温水の温度が上がり設定温度の温水が前記循環路を流れることができ、その結果、開栓時には前記給湯栓から出る温水の温度は設定温度となるため、快適性を高めることができる。 According to claim 1 of the present invention, when the hot water supply detection means does not detect and the circulation path detection means detects, the control unit sets the can body temperature to a high temperature from the first temperature table. Since the combustion of the burner is controlled based on the second temperature table, the temperature of the hot water at the hot water outlet at the top of the can rises and the hot water at the set temperature can flow through the circulation path. Since the temperature of the hot water coming out of the hot water tap is the set temperature, comfort can be enhanced.

請求項2によれば、前記温水戻り口を前記缶体に設け、前記出湯検出手段が検出無で前記循環路検出手段が検出有の場合に、前記ミキシング弁の前記バイパス管側を閉止し前記給湯管側を全開とし、前記給湯温度センサによって前記循環路の温水の温度を前記設定温度とするよう前記バーナの燃焼を制御するので、前記設定温度の温水が前記循環路を流れることができ、その結果、開栓時には前記給湯栓から出る温水の温度が設定温度となるため、快適性を高めることができる。 According to claim 2, the hot water return port is provided in the boiler body, and when the hot water detection means does not detect but the circulation path detection means detects, the bypass pipe side of the mixing valve is closed and the The hot water supply pipe side is fully opened, and the combustion of the burner is controlled by the hot water supply temperature sensor so that the temperature of the hot water in the circulation path becomes the set temperature, so that the hot water at the set temperature can flow through the circulation path, As a result, when the hot water supply valve is opened, the temperature of the hot water discharged from the hot water supply valve becomes the set temperature, so that comfort can be enhanced.

本発明の第1の実施形態を説明する概略構成図1 is a schematic block diagram for explaining a first embodiment of the present invention; FIG. 本発明の第1の実施形態を説明する要部ブロック図FIG. 1 is a block diagram of main parts for explaining a first embodiment of the present invention; 本発明の第1の実施形態の設定温度と目標缶体温度を設定する際に用いられるテーブルを表す図FIG. 2 is a diagram showing a table used when setting the set temperature and the target can body temperature according to the first embodiment of the present invention; 本発明の第1の実施形態の動作を示すフローチャートFlowchart showing the operation of the first embodiment of the present invention 本発明の第2の実施形態を説明する概略構成図Schematic configuration diagram for explaining a second embodiment of the present invention 本発明の第2の実施形態を説明する要部ブロック図FIG. 2 is a block diagram of the essential parts for explaining the second embodiment of the present invention; 本発明の第2の実施形態の動作を示すフローチャートFlowchart showing the operation of the second embodiment of the present invention 従来の即湯機能付き給湯機のミキシング弁なしの実施形態を説明する概略構成図Schematic configuration diagram for explaining an embodiment without a mixing valve of a conventional water heater with instant hot water function 従来の即湯機能付き給湯機のミキシング弁付きの実施形態を説明する概略構成図Schematic configuration diagram for explaining an embodiment with a mixing valve of a conventional water heater with instant hot water function

図1を参照して、本発明にかかる即湯機能付き給湯機の第1の実施形態を説明する。
なお、各図において、共通する構成要素や同種の構成要素については、同一の符号を付し、それらの重複する説明を適宜省略する。
With reference to FIG. 1, a first embodiment of a water heater with instant hot water function according to the present invention will be described.
In addition, in each figure, the same code|symbol is attached|subjected about a common component and the same kind of component, and those overlapping description is abbreviate|omitted suitably.

図1に示すように、1はミキシング弁を備えていない即湯機能付き給湯機で、内部に一定量の湯水が貯湯され、送風ファン14からの燃焼用空気の供給を受けて燃料(灯油またはガス)を燃焼させる燃焼機器としてのバーナ13と、バーナ13の燃焼により発生した燃焼ガスから熱回収し前記湯水を加熱する熱交換器20と、熱交換器20の上方に設置され熱交換器20を通過した後の燃焼ガスを集合させる排気室17と、排気室17を通過した後の燃焼ガスを機外に排出する排気筒18を有しているものである。 As shown in FIG. 1, reference numeral 1 denotes a hot water heater with a hot water function that does not have a mixing valve. a burner 13 as a combustion device that burns gas), a heat exchanger 20 that recovers heat from the combustion gas generated by the combustion of the burner 13 and heats the hot water, and a heat exchanger 20 that is installed above the heat exchanger 20 It has an exhaust chamber 17 for collecting the combustion gas after passing through the exhaust chamber 17 and an exhaust pipe 18 for discharging the combustion gas after passing through the exhaust chamber 17 to the outside of the machine.

熱交換器20は、内部に一定量の湯水を貯留する円筒状の缶体10と、缶体10の下部内側に形成されバーナ13の燃焼が行われる燃焼室15と、燃焼室15と排気室17を連通し、バーナ13の燃焼により発生した燃焼ガスを通過させる複数本の煙管16とで構成されている。 The heat exchanger 20 includes a cylindrical can body 10 that stores a certain amount of hot water, a combustion chamber 15 that is formed inside the lower part of the can body 10 and in which the burner 13 burns, the combustion chamber 15, and an exhaust chamber. 17 and a plurality of smoke pipes 16 through which combustion gas generated by combustion of the burner 13 passes.

21は缶体10の上下略中央に取り付けられた湯水の温度を検出する缶体温度センサである。
また、缶体10下部の側周面には給水口22が設けられ、給水口22に給水管11が接続され、給水管11の途中に減圧弁12が設けられている。
Reference numeral 21 denotes a can body temperature sensor that detects the temperature of hot or cold water and is attached to approximately the upper and lower center of the can body 10 .
A water supply port 22 is provided on the side peripheral surface of the lower portion of the can body 10 , a water supply pipe 11 is connected to the water supply port 22 , and a pressure reducing valve 12 is provided in the middle of the water supply pipe 11 .

さらに、缶体10の側周面には、缶体10上部に缶体10内に貯湯されている湯水を給湯するための温水出口23が設けられ、缶体10下部に循環した温水を缶体10に戻し入れるための温水戻り口24が設けられており、温水出口23と温水戻り口24の間に給湯栓35と、ポンプ36と、給湯逆止弁37とを備えた循環路34が設けられている。
また、バーナ13の燃焼制御を行う制御部80と、この制御部80と通信可能に接続されたリモコン90を備えている。
Further, a hot water outlet 23 for supplying hot water stored in the upper part of the can body 10 is provided on the side peripheral surface of the can body 10, and the hot water outlet 23 for supplying the hot water stored in the can body 10 is provided. A hot water return port 24 is provided for returning to the hot water supply 10, and a circulation path 34 having a hot water tap 35, a pump 36, and a hot water supply check valve 37 is provided between the hot water outlet 23 and the hot water return port 24. It is
It also has a control section 80 for controlling combustion of the burner 13 and a remote controller 90 communicably connected to the control section 80 .

図2と図3に示すように、80はマイコンからなる制御部で、入力側には缶体温度センサ21、出湯の有無を検出する出湯検出手段25と、循環路34の温水の流れを検出する循環路検出手段30とが接続され、出力側にはバーナ13と送風ファン14が接続されている。
また、制御部80にはリモコン90で設定した設定温度と目標缶体温度との対応関係を定めた温度テーブル83が記憶されている。
As shown in FIGS. 2 and 3, reference numeral 80 denotes a control unit composed of a microcomputer, and on the input side, there is a can body temperature sensor 21, a hot water detection means 25 for detecting the presence or absence of hot water, and a flow of hot water in the circulation path 34. A circuit detection means 30 is connected, and a burner 13 and a blower fan 14 are connected to the output side.
The control unit 80 also stores a temperature table 83 that defines the correspondence between the set temperature set by the remote controller 90 and the target can body temperature.

温度テーブル83は、第1温度テーブル81と、前記第1温度テーブル81より目標缶体温度が高温に設定された第2温度テーブル82を備えており、後述する出湯検出手段25と循環路検出手段30の組み合わせによって使い分けられ、例えば、リモコン90の設定温度が40℃のとき第1温度テーブル81では目標缶体温度は35℃であり、第2温度テーブル82では目標缶体温度が40℃であり、第1温度テーブル81より第2温度テーブル82が高温に設定されている。 The temperature table 83 includes a first temperature table 81 and a second temperature table 82 in which the target can body temperature is set higher than that of the first temperature table 81. For example, when the set temperature of the remote controller 90 is 40° C., the target can body temperature is 35° C. in the first temperature table 81 and the target can body temperature is 40° C. in the second temperature table 82 . , the second temperature table 82 is set to a higher temperature than the first temperature table 81 .

出湯検出手段25は、給水管11に備えた図示しない流水スイッチによって、給水管11に流水がある場合は流水有の信号を検出し(検出有)、流水が無い場合は流水無しの信号または信号そのものの検出無によって(検出無)、給湯栓35が開栓の状態か、または、閉止の状態かを検出する。
なお、出湯検出手段25は、ポンプ36の駆動がオフまたは循環路34の給湯栓35から温水戻り口24の間に流水が無い場合に、循環路34の温水出口23と給湯栓35の間に備えた流水スイッチの信号を検出することで、給湯栓35が開栓の状態か、または、閉止の状態かを検出してもよい。
The hot water detecting means 25 detects a signal indicating that water is flowing (detected) when there is water flowing in the water supply pipe 11 by means of a water flow switch (not shown) provided in the water supply pipe 11, and outputs a signal or a signal indicating that water is not flowing when there is no water flowing. Whether the hot water supply tap 35 is open or closed is detected based on the non-detection of itself (non-detection).
Note that the hot water detection means 25 detects the amount of water flowing between the hot water outlet 23 of the circulation path 34 and the hot water supply tap 35 when the pump 36 is not driven or when there is no running water between the hot water supply valve 35 and the hot water return port 24 of the circulation path 34 . It may be detected whether the hot water tap 35 is open or closed by detecting the signal of the provided running water switch.

また、循環路検出手段30は、給湯栓35と温水戻り口24の間の循環路34に設けた図示しない流水スイッチによって、循環路34の給湯栓35から温水戻り口24の間の流水の有無を検出する。
なお、ポンプ36のオンオフ信号を電気的に検出する方法でもよく、他にも、給湯栓35が閉止されている場合に、循環路34の温水出口23と給湯栓35の間に備えた流水スイッチの信号を検出することで、循環路34の給湯栓35から温水戻り口24の間の流水の有無を検出してもよい。
The circuit detection means 30 detects whether or not water is flowing between the hot water tap 35 and the hot water return port 24 of the circuit 34 by means of a water flow switch (not shown) provided in the circuit 34 between the hot water tap 35 and the hot water return port 24 . to detect
A method of electrically detecting the on/off signal of the pump 36 may be used. Alternatively, a running water switch provided between the hot water outlet 23 of the circulation path 34 and the hot water faucet 35 when the hot water faucet 35 is closed may be used. The presence or absence of running water between the hot water tap 35 and the hot water return port 24 of the circulation path 34 may be detected by detecting the signal of .

制御部80は、缶体10内の湯水を加熱する加熱制御(燃焼制御)として、缶体10内の湯水の温度が後述する温度テーブル83に基づいた目標缶体温度になるように、缶体温度センサ21で検出される缶体10内の湯水の温度に基づき、バーナ13の燃焼を制御するものである。 As heating control (combustion control) for heating hot water in the can body 10, the control unit 80 controls the temperature of the hot water in the can body 10 to reach a target temperature based on a temperature table 83 described later. Combustion of the burner 13 is controlled based on the temperature of hot water in the can body 10 detected by the temperature sensor 21 .

より詳細には、温度テーブル83に基づいて目標缶体温度が定まると、それに応じてバーナ13による加熱を開始する加熱開始温度(燃焼オン温度)及びバーナ13による加熱を停止する加熱停止温度(燃焼オフ温度)が設定され、制御部80は、缶体温度センサ21の検出する温度が前記加熱開始温度(燃焼オン温度)に達したら、バーナ13の燃焼加熱を開始し、缶体温度センサ21の検出する温度が前記加熱停止温度(燃焼オフ温度)に達したら、バーナ13の燃焼加熱を停止する制御を行って、缶体10内の熱媒体の温度が前記目標缶体温度になるように制御するものである。 More specifically, when the target body temperature is determined based on the temperature table 83, the heating start temperature (combustion ON temperature) at which heating by the burner 13 is started and the heating stop temperature (combustion ON temperature) at which heating by the burner 13 is stopped are set accordingly. off temperature) is set, and when the temperature detected by the can body temperature sensor 21 reaches the heating start temperature (combustion on temperature), the control unit 80 starts combustion heating of the burner 13, and the can body temperature sensor 21 When the detected temperature reaches the heating stop temperature (combustion off temperature), control is performed to stop the combustion heating of the burner 13, and the temperature of the heat medium in the can body 10 is controlled to the target can body temperature. It is something to do.

次に、本発明の第1の実施形態の作用について図4に基づいて説明する。
制御部80は、ステップS1にて出湯検出手段25にて給湯栓35が開栓され出湯中か否かを検出し、検出無の場合はステップS2へ遷移し、検出有の場合はステップS4へ遷移する。
ステップS2で、循環路検出手段30にて循環路34に温水が循環しているか否かを検出し、検出有の場合はステップS3へ遷移し、検出無の場合はステップS4へ遷移する。
Next, operation of the first embodiment of the present invention will be described with reference to FIG.
In step S1, the control unit 80 detects whether or not the hot water supply tap 35 is opened by the hot water detection means 25 and hot water is being supplied. If no detection is made, the process proceeds to step S2. Transition.
At step S2, it is detected whether or not hot water is circulating in the circulation path 34 by the circulation path detection means 30. If detected, the process proceeds to step S3, and if not detected, the process proceeds to step S4.

ステップS3では、第2温度テーブル82に基づいて、缶体温度センサ21の温度が、リモコン90で設定した設定温度に対応する目標缶体温度になるようバーナ13を制御する。
ステップS4では、第1温度テーブル81に基づいて、缶体温度センサ21の温度が、リモコン90で設定した設定温度に対応する目標缶体温度になるようバーナ13を制御する。
In step S3, based on the second temperature table 82, the burner 13 is controlled so that the temperature of the can body temperature sensor 21 becomes the target can body temperature corresponding to the set temperature set by the remote control 90. FIG.
In step S<b>4 , based on the first temperature table 81 , the burner 13 is controlled so that the temperature of the can body temperature sensor 21 becomes the target can body temperature corresponding to the set temperature set by the remote controller 90 .

これにより、例えばリモコン90の設定温度が40℃のとき、ステップS1で検出有の場合は、第1温度テーブル81に基づいて缶体10の上下略中央に設置した缶体温度センサ21の温度が目標缶体温度の35℃になるようバーナ13が制御され、このとき缶体10上部の温水出口23付近の温度は前記設定温度40℃になり、給湯栓35から前記設定温度40℃の温水が給湯される。 As a result, for example, when the set temperature of the remote control 90 is 40° C., the temperature of the can body temperature sensor 21 installed approximately in the upper and lower center of the can body 10 based on the first temperature table 81 will be The burner 13 is controlled so that the target temperature of the boiler body is 35° C. At this time, the temperature near the hot water outlet 23 at the top of the boiler body 10 reaches the set temperature of 40° C., and hot water of the set temperature of 40° C. is supplied from the hot water tap 35 . Hot water is supplied.

一方、例えばリモコン90の設定温度が40℃のとき、ステップS1で検出無かつステップS2で検出有の即湯運転中は、缶体10の上下略中央に設置した缶体温度センサ21の温度が第2温度テーブル82に基づいて目標缶体温度40℃になるようバーナ13が制御され、このとき缶体10上部の温水出口23付近の温度は前記設定温度40℃になって循環路34を流れる。そして、温水戻り口24では40℃をやや下回った温度の温水が循環路34から缶体10に流れ込み、引き続き缶体温度センサ21の温度が目標缶体温度40℃になるようバーナ13が制御される。その後、給湯栓35の開栓時には前記設定温度40℃の温度の温水が給湯でき、使用者がリモコン90で設定した温度40℃の温水が直ちに給湯できるため快適に使用できる。 On the other hand, for example, when the set temperature of the remote control 90 is 40° C., the temperature of the can body temperature sensor 21 installed approximately in the upper and lower center of the can body 10 is increased during the hot water operation with no detection in step S1 and with detection in step S2. Based on the second temperature table 82, the burner 13 is controlled so that the target temperature of the can body is 40.degree. . At the hot water return port 24, hot water having a temperature slightly lower than 40°C flows into the can 10 from the circulation path 34, and the burner 13 is controlled so that the temperature of the can temperature sensor 21 reaches the target temperature of 40°C. be. After that, when the hot water tap 35 is opened, hot water at the set temperature of 40° C. can be supplied, and hot water at the temperature of 40° C. set by the user with the remote control 90 can be immediately supplied, so that the user can use the apparatus comfortably.

なお、温水戻り口24を前記缶体10に設けたが、温水戻り口24を前記給水管11に設けてもよいものである。 Although the hot water return port 24 is provided in the can body 10 , the hot water return port 24 may be provided in the water supply pipe 11 .

次に、本発明の第2の実施形態について図5に基づいて説明する。 Next, a second embodiment of the invention will be described with reference to FIG.

図5に示すように、1はミキシング弁を備えた即湯機能付き給湯機である。
循環路34の給湯栓35より上流側にミキシング弁26が設けられ、ミキシング弁26は循環路34内に給湯温度センサ27を備えている。
また、給水管11に給水逆止弁28を備え、給水逆止弁28より下流側の給水管11から分岐してミキシング弁26と接続するバイパス管29を備えている。
As shown in FIG. 5, 1 is a water heater with a quick hot water function provided with a mixing valve.
A mixing valve 26 is provided upstream of the hot water tap 35 in the circulation path 34 , and the mixing valve 26 is provided with a hot water supply temperature sensor 27 in the circulation path 34 .
Further, the water supply pipe 11 is provided with a water supply check valve 28 , and a bypass pipe 29 branched from the water supply pipe 11 on the downstream side of the water supply check valve 28 and connected to the mixing valve 26 .

図6に示すように、制御部80の入力側には缶体温度センサ21、給湯温度センサ27、出湯の有無を検出する出湯検出手段25と、循環路34の温水の流れを検出する循環路検出手段30とが接続される。
また、出力側にはバーナ13、送風ファン14、ミキシング弁26が接続され、燃焼制御とミキシング弁の制御を行うものである。
As shown in FIG. 6, on the input side of the control unit 80 are a can body temperature sensor 21, a hot water supply temperature sensor 27, hot water detection means 25 for detecting the presence or absence of hot water discharge, and a circulation path for detecting the flow of hot water in the circulation path 34. A detection means 30 is connected.
A burner 13, a blower fan 14, and a mixing valve 26 are connected to the output side to control combustion and the mixing valve.

制御部80は、缶体10内の湯水を加熱する加熱制御(燃焼制御)として、缶体10内の湯水の温度がリモコン90で設定した設定温度より高い所定の目標缶体温度(例えばリモコン90の設定温度が40℃であれば目標缶体温度は50℃)になるようバーナ13を制御し、ミキシング弁26にて給湯温度センサ27の温度がリモコン90で設定した設定温度になるよう制御する。 As heating control (combustion control) for heating the hot water in the can 10, the control unit 80 sets the temperature of the hot water in the can 10 to a predetermined target temperature higher than the set temperature set by the remote controller 90 (for example, the remote controller 90). If the set temperature is 40° C., the target boiler body temperature is 50° C.), and the mixing valve 26 is controlled so that the temperature of the hot water supply temperature sensor 27 becomes the set temperature set by the remote control 90. .

次に、本発明の第2の実施形態の作用について図7に基づいて説明する。
制御部80は、ステップS11にて出湯検出手段25にて給湯栓35が開栓され出湯中か否かを検出し、検出無の場合はステップS12へ遷移し、検出有の場合はステップS15へ遷移する。
ステップS12で、循環路検出手段30にて循環路34に温水が循環しているか否かを検出し、検出有の場合はステップS13へ遷移し、検出無の場合はステップS15へ遷移する。
Next, operation of the second embodiment of the present invention will be described with reference to FIG.
In step S11, the control unit 80 detects whether or not the hot water supply valve 35 is opened by the hot water detection means 25 and hot water is being supplied. If no detection is made, the process proceeds to step S12. Transition.
In step S12, it is detected by the circulation path detection means 30 whether or not hot water is circulating in the circulation path 34. If detected, the process proceeds to step S13, and if not detected, the process proceeds to step S15.

ステップS13では、ミキシング弁26は循環路34側を全開でバイパス管29側を閉止する。
ステップS14で、給湯温度センサ27がリモコン90で設定した設定温度になるようバーナ13の燃焼を制御する。
In step S13, the mixing valve 26 fully opens the circulation path 34 side and closes the bypass pipe 29 side.
In step S14, the combustion of the burner 13 is controlled so that the hot water supply temperature sensor 27 reaches the set temperature set by the remote controller 90. FIG.

一方、ステップS15では、設定温度より高い所定の温度になるようバーナ13の燃焼を制御する。
ステップS16で、給湯温度センサ27がリモコン90で設定した設定温度になるようミキシング弁26を制御する。
On the other hand, in step S15, the combustion of the burner 13 is controlled so as to reach a predetermined temperature higher than the set temperature.
In step S16, the mixing valve 26 is controlled so that the hot water supply temperature sensor 27 reaches the set temperature set by the remote control 90. FIG.

これにより、例えばリモコン90の設定温度が40℃のとき、ステップS11で検出有の場合は、缶体10の上下略中央に設置した缶体温度センサ21の温度が目標缶体温度50℃になるようバーナ13が制御され、このとき缶体10上部の温水出口23付近の温度は55℃になり、ミキシング弁26の給湯温度センサ27が前記設定温度40℃になるよう制御され、給湯栓35からは前記設定温度の40℃の温水が給湯される。 As a result, for example, when the set temperature of the remote control 90 is 40° C., the temperature of the can body temperature sensor 21 installed substantially in the upper and lower center of the can body 10 becomes the target can body temperature of 50° C. if detection is present in step S11. At this time, the temperature near the hot water outlet 23 at the top of the boiler body 10 is controlled to 55°C, and the hot water supply temperature sensor 27 of the mixing valve 26 is controlled so that the set temperature is 40°C. is supplied with hot water at 40° C., which is the set temperature.

一方、例えばリモコン90の設定温度が40℃のとき、ステップS11で検出無かつステップS12で検出有の即湯運転中は、ミキシング弁26の循環路34側を全開にしてバイパス管29側を全閉にし、給湯温度センサ27が循環路34の温水の温度を前記設定温度40℃にするようバーナ13の燃焼を制御するので、設定温度40℃の温水が循環路34を流れることができ、その結果、給湯栓35を開栓時には給湯栓35から出る温水の温度が前記設定温度40℃となるため、快適に使用できる。 On the other hand, for example, when the set temperature of the remote controller 90 is 40° C., during the instant hot water operation with no detection in step S11 and detection in step S12, the circulation path 34 side of the mixing valve 26 is fully opened and the bypass pipe 29 side is fully opened. Since the hot water supply temperature sensor 27 controls the combustion of the burner 13 so that the temperature of the hot water in the circulation passage 34 reaches the set temperature of 40° C., the hot water at the set temperature of 40° C. can flow through the circulation passage 34. As a result, when the hot water tap 35 is opened, the temperature of the hot water coming out of the hot water tap 35 reaches the set temperature of 40° C., so that it can be used comfortably.

なお、この実施形態では上向きに取り付けられたバーナを構成する燃焼機器で説明したが、これに限定されることなく、例えば横向きに取り付けたガンタイプバーナを構成する燃焼機器でもよい。 In this embodiment, the combustion equipment that constitutes a burner that is mounted upward has been described, but the invention is not limited to this, and the combustion equipment that constitutes a gun-type burner that is mounted sideways, for example, may be used.

なお、本実施形態で用いたその他の構成は一例として提示したものであり、発明の範囲を限定することは意図しておらず、その他の様々な形態で実施されることが可能であり、発明の要旨を逸脱しない範囲において、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。 It should be noted that other configurations used in the present embodiment are presented as an example, and are not intended to limit the scope of the invention, and can be implemented in various other forms. Various omissions, replacements, and changes can be made without departing from the scope of the description. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1 即湯機能付き給湯機
10 缶体
11 給水管
12 減圧弁
13 バーナ
21 缶体温度センサ
22 給水口
23 温水出口
24 温水戻り口
25 出湯検出手段
26 ミキシング弁
27 給湯温度センサ
28 給水逆止弁
29 バイパス管
30 循環路検出手段
34 循環路
35 給湯栓
36 ポンプ
37 給湯逆止弁
80 制御部
81 第1温度テーブル
82 第2温度テーブル
83 温度テーブル
90 リモコン
REFERENCE SIGNS LIST 1 hot water heater with instant hot water function 10 boiler body 11 water supply pipe 12 pressure reducing valve 13 burner 21 boiler body temperature sensor 22 water supply port 23 hot water outlet 24 hot water return port 25 hot water detection means 26 mixing valve 27 hot water supply temperature sensor 28 water supply check valve 29 Bypass pipe 30 Circulation path detection means 34 Circulation path 35 Hot water tap 36 Pump 37 Hot water supply check valve 80 Control unit 81 First temperature table 82 Second temperature table 83 Temperature table 90 Remote controller

Claims (2)

温水を貯湯する缶体と、
前記缶体を加熱するバーナと、
前記缶体の温度を計測する缶体温度センサと、
前記缶体に設けた給水口と、
前記給水口に接続された給水管と、
前記給水管の途中に設けられた減圧弁と、
前記缶体に設けた温水出口と、
前記缶体または前記給水管に設けた温水戻り口と、
前記温水出口と前記温水戻り口の間にポンプと給湯逆止弁とを備えた循環路と、
前記循環路の途中に設けられた給湯栓と、
前記給湯栓の出湯の有無を検出する出湯検出手段と、
前記循環路の温水の流れの有無を検出する循環路検出手段と、
前記バーナの燃焼制御を行う制御部と、
前記制御部と通信可能に接続されたリモコンと、
を備え、
前記制御部は、前記リモコンで設定した設定温度と目標缶体温度との対応関係を定めた温度テーブルを備え、
さらに、前記設定温度に設定されたとき、前記缶体温度センサで検出する前記缶体内の温水の温度が、前記温度テーブルに基づいて定められる前記目標缶体温度になるよう前記バーナの燃焼を制御し、
前記温度テーブルは、第1温度テーブルと、前記第1温度テーブルより前記目標缶体温度が高温に設定された第2温度テーブルを備え、
前記制御部は、前記出湯検出手段の検出有無と前記循環路検出手段の検出有無の4つの組み合わせのうち、
前記出湯検出手段が検出無で、前記循環路検出手段の検出有の組み合わせの場合は、
前記第2温度テーブルに基づいて前記バーナの燃焼を制御し、
他の組み合わせの場合は、
前記第1温度テーブルに基づいて前記バーナの燃焼を制御する
ことを特徴とする即湯機能付き給湯機。
a can body for storing hot water;
a burner for heating the can body;
a can body temperature sensor for measuring the temperature of the can body;
a water supply port provided in the can;
a water supply pipe connected to the water supply port;
a pressure reducing valve provided in the middle of the water supply pipe;
a hot water outlet provided in the can;
a hot water return port provided in the can body or the water supply pipe;
a circulation path provided with a pump and a hot water supply check valve between the hot water outlet and the hot water return port;
a hot water tap provided in the middle of the circulation path;
Hot water detection means for detecting whether or not hot water is discharged from the hot water tap;
Circulation path detection means for detecting the presence or absence of flow of hot water in the circulation path;
a control unit that controls combustion of the burner;
a remote controller communicably connected to the control unit;
with
The control unit includes a temperature table that defines a correspondence relationship between the set temperature set by the remote controller and the target can body temperature,
Furthermore, when the set temperature is set, the combustion of the burner is controlled so that the temperature of the hot water in the can body detected by the can body temperature sensor becomes the target body temperature determined based on the temperature table. death,
The temperature table includes a first temperature table and a second temperature table in which the target can body temperature is set higher than the first temperature table,
The control unit selects, among four combinations of presence/absence of detection by the hot water detection means and presence/absence of detection by the circulation path detection means,
In the case of a combination of the undetected hot water detection means and the undetected circuit detection means,
controlling combustion of the burner based on the second temperature table;
For other combinations,
A water heater with a hot water function, wherein combustion of the burner is controlled based on the first temperature table.
温水を貯湯する缶体と、
前記缶体を加熱するバーナと、
前記缶体の温度を計測する缶体温度センサと、
前記缶体に設けた給水口と、
前記給水口に接続された給水管と、
前記給水管の途中に設けられた減圧弁と給水逆止弁と、
前記缶体に設けた温水出口と、
前記缶体に設けた温水戻り口と、
前記温水出口と前記温水戻り口の間にポンプと給湯逆止弁とを備えた循環路と、
前記循環路の途中に設けられた給湯栓と、
前記給湯栓の出湯の有無を検出する出湯検出手段と、
前記循環路の温水の流れの有無を検出する循環路検出手段と、
前記循環路の途中で前記給湯栓より上流に設けた給湯温度センサを備えるミキシング弁と、
前記給水管から分岐して前記ミキシング弁と接続するバイパス管と、
前記バーナの燃焼制御と前記給湯温度センサにて前記ミキシング弁の制御を行う制御部と、
前記制御部と通信可能に接続されたリモコンと、
を備え、
前記制御部は、前記出湯検出手段の検出有無と前記循環路検出手段の検出有無の4つの組み合わせのうち、
前記出湯検出手段が検出無で、前記循環路検出手段の検出有の組み合わせの場合は、
前記ミキシング弁は前記循環路側を全開とし前記バイパス管側を閉止して、
前記給湯温度センサの温度が前記リモコンで設定した設定温度になるよう前記バーナを制御し、
他の組み合わせの場合は、
前記缶体温度センサで検出する前記缶体内の温水の温度が前記リモコンで設定した前記設定温度より高い所定の目標缶体温度になるよう前記バーナを制御し、
前記ミキシング弁にて前記給湯温度センサの温度が前記リモコンで設定した前記設定温度になるよう制御する
ことを特徴とする即湯機能付き給湯機。
a can body for storing hot water;
a burner for heating the can body;
a can body temperature sensor for measuring the temperature of the can body;
a water supply port provided in the can;
a water supply pipe connected to the water supply port;
a pressure reducing valve and a water supply check valve provided in the middle of the water supply pipe;
a hot water outlet provided in the can;
a hot water return port provided in the can;
a circulation path provided with a pump and a hot water supply check valve between the hot water outlet and the hot water return port;
a hot water tap provided in the middle of the circulation path;
Hot water detection means for detecting whether or not hot water is discharged from the hot water tap;
Circulation path detection means for detecting the presence or absence of flow of hot water in the circulation path;
a mixing valve provided with a hot water supply temperature sensor provided upstream from the hot water tap in the middle of the circulation path;
a bypass pipe branched from the water supply pipe and connected to the mixing valve;
a control unit that performs combustion control of the burner and controls the mixing valve with the hot water supply temperature sensor;
a remote controller communicably connected to the control unit;
with
The control unit selects, among four combinations of presence/absence of detection by the hot water detection means and presence/absence of detection by the circulation path detection means,
In the case of a combination of the undetected hot water detection means and the undetected circuit detection means,
The mixing valve is fully opened on the circulation path side and closed on the bypass pipe side,
controlling the burner so that the temperature of the hot water supply temperature sensor reaches the set temperature set by the remote control;
For other combinations,
controlling the burner so that the temperature of hot water in the can body detected by the can body temperature sensor reaches a predetermined target can body temperature higher than the set temperature set by the remote controller;
A water heater with an instant hot water function, wherein the temperature of the hot water supply temperature sensor is controlled by the mixing valve so that the temperature of the hot water supply temperature sensor becomes the set temperature set by the remote controller.
JP2021022707A 2021-02-16 2021-02-16 Water heater with instant hot water function Active JP7456956B2 (en)

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Publication number Priority date Publication date Assignee Title
JP2000088267A (en) 1998-09-08 2000-03-31 Chofu Seisakusho Co Ltd Tap-controlled hot-water supplier
JP2003097853A (en) 2001-07-17 2003-04-03 Toto Ltd Kerosene water heater
JP2005241086A (en) 2004-02-25 2005-09-08 Corona Corp Water and space heater, bath space heater, and water and bath space heater
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