JP2016080218A - Water heater - Google Patents

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JP2016080218A
JP2016080218A JP2014209943A JP2014209943A JP2016080218A JP 2016080218 A JP2016080218 A JP 2016080218A JP 2014209943 A JP2014209943 A JP 2014209943A JP 2014209943 A JP2014209943 A JP 2014209943A JP 2016080218 A JP2016080218 A JP 2016080218A
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hot water
water level
bathtub
water
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JP6284867B2 (en
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山田 学
Manabu Yamada
学 山田
篤 深谷
Atsushi Fukaya
篤 深谷
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Rinnai Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a water heater that prevents setting of a water level correction value inappropriate for a target hot water filling water level.SOLUTION: Water level change detection means 47 detects change of a water level of hot water within a bathtub 2 caused by a factor other than an automatic hot water filling operation. Water level correction value updating means updates a water level correction value so as to reduce a water level difference between a detection water level obtained by a water level sensor when target hot water filling amount of hot water is supplied to the bathtub 2 through the automatic hot water filling operation and a target hot water filling water level, and does not update the water level correction value on the basis of the water level difference through automatic hot water filling operation this time when change of the water level of the hot water within the bathtub 2 caused by a factor other than the automatic hot water filling operation is detected by the water level change detection means 47 while the automatic hot water filling operation is being executed.SELECTED DRAWING: Figure 1

Description

本発明は、自動湯張り機能を有する給湯装置に関する。   The present invention relates to a hot water supply apparatus having an automatic hot water filling function.

従来、リモコン等により設定された目標湯張り水位になるまで、浴槽に湯を供給する自動湯張り機能を備えた給湯装置が知られている(例えば、特許文献1参照)。特許文献1に記載された給湯装置は、浴槽内の水位を検出する水位センサと、浴槽に供給される湯の流量を検出する流量センサとを備えて、給湯装置の使用開始時からの経年変化等による水位センサの検出誤差に対応するための補正処理を行っている。   Conventionally, a hot water supply apparatus having an automatic hot water filling function for supplying hot water to a bathtub until a target hot water level set by a remote controller or the like is known (see, for example, Patent Document 1). The hot water supply apparatus described in Patent Document 1 includes a water level sensor that detects the water level in the bathtub and a flow rate sensor that detects the flow rate of the hot water supplied to the bathtub, and changes over time from the start of use of the hot water supply apparatus. Correction processing is performed to cope with detection errors of the water level sensor due to the above.

具体的には、給湯装置の設置時に行う自動湯張りの試運転時に、浴槽への給湯量(流量センサによる検出流量の積算値)と水位センサの検出水位との対応を学習し、この対応に基づいて、目標湯張り水位の湯張りを行うために必要な給湯量(湯張り量)を決定している。   Specifically, during the trial run of automatic hot water filling that is performed when the hot water supply device is installed, the correspondence between the amount of hot water supplied to the bathtub (the integrated value of the flow rate detected by the flow sensor) and the detected water level of the water level sensor is learned and based on this correspondence Thus, the amount of hot water supply (the amount of hot water filling) necessary for hot water filling at the target hot water filling water level is determined.

そして、給湯装置の使用が開始されて自動湯張りが実行されたときに、湯張り完了時の水位センサの検出水位値と目標湯張り水位との水位差に基づく水位補正値を算出し、自動湯張り後の水位制御を、水位センサの検出水位に水位補正値を加えた水位に基づいて行うようにしている。   When automatic hot water filling is started after the use of the hot water supply device is started, a water level correction value is calculated based on the water level difference between the detected water level value of the water level sensor when the hot water filling is completed and the target hot water filling level. Water level control after filling is performed based on the water level obtained by adding a water level correction value to the water level detected by the water level sensor.

特開2010−276253号公報JP 2010-276253 A

本願発明者らは、自動湯張りが完了した時の水位センサの検出水位と目標湯張り水位との水位差を減少させるように目標湯張り水位の水位補正値を設定したときに、不適切な水位補正値が設定される場合があることを知見した。   When the water level correction value of the target hot water level is set so as to reduce the water level difference between the detected water level of the water level sensor and the target hot water level when automatic hot water filling is completed, It has been found that a water level correction value may be set.

本発明はかかる背景に鑑みてなされたものであり、目標湯張り水位に対して不適切な水位補正値が設定されることを防止した給湯装置を提供することを目的とする。   The present invention has been made in view of such a background, and an object thereof is to provide a hot water supply apparatus that prevents an inappropriate water level correction value from being set with respect to a target hot water level.

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、本発明の給湯装置は、
浴槽に湯を供給する給湯手段と、
前記浴槽内の湯水の水位を検出する水位検出手段と、
前記給湯手段から前記浴槽に供給された湯量を検出する湯量検出手段と、
前記給湯手段により前記浴槽に湯を供給して、前記水位検出手段により検出される前記浴槽内の湯水の水位と、前記湯量検出手段により検出される前記浴槽に供給された湯量との対応関係を算出する対応関係算出手段と、
所定の目標湯張り水位と該目標湯張り水位を調節するための水位補正値とに基づいて設定された補正湯張り水位に対応する目標湯張り量を、前記対応関係に基づいて決定する目標湯張り量決定手段と、
前記給湯手段により前記浴槽に前記目標湯張り量の湯を供給する自動湯張り運転を実行する湯張り制御手段と、
前記自動湯張り運転により前記目標湯張り量の湯を前記浴槽に供給したときの前記水位検出手段の検出水位と、前記目標湯張り水位との水位差を減少させるように、前記水位補正値を更新する水位補正値更新手段とを備えた給湯装置に関する。
The present invention has been made to achieve the above object, and the hot water supply apparatus of the present invention comprises:
A hot water supply means for supplying hot water to the bathtub;
Water level detection means for detecting the level of hot water in the bathtub;
Hot water detection means for detecting the amount of hot water supplied to the bathtub from the hot water supply means;
Hot water is supplied to the bathtub by the hot water supply means, and the correspondence between the hot water level in the bathtub detected by the water level detection means and the amount of hot water supplied to the bathtub detected by the hot water detection means Correspondence calculating means for calculating;
A target hot water amount that determines a target hot water amount corresponding to a corrected hot water level set based on a predetermined target hot water level and a water level correction value for adjusting the target hot water level based on the correspondence relationship. Tension amount determining means;
Hot water filling control means for executing automatic hot water filling operation for supplying hot water of the target hot water amount to the bathtub by the hot water supply means;
The water level correction value is set so as to reduce the difference between the detected water level of the water level detecting means and the target hot water level when the target hot water amount is supplied to the bathtub by the automatic hot water operation. The present invention relates to a water heater provided with a water level correction value updating means for updating.

そして、本発明の給湯装置は、
前記自動湯張り運転以外の要因による前記浴槽内の湯水の水位の変化を検出する水位変化検出手段を備え、
前記水位補正値更新手段は、前記自動湯張り運転の実行中に、前記水位変化検出手段により前記自動湯張り運転以外の要因による前記浴槽内の湯水の水位の変化が検出されたときには、今回の自動湯張り運転における前記水位差に基づく前記水位補正値の更新を行わないことを特徴とする。
And the hot water supply apparatus of this invention is
Water level change detecting means for detecting a change in the water level of the hot water in the bathtub due to factors other than the automatic hot water operation,
When the water level correction value updating means detects a change in the water level of the hot water in the bathtub due to a factor other than the automatic water filling operation by the water level change detection means during execution of the automatic water filling operation, The water level correction value is not updated based on the water level difference in the automatic hot water operation.

かかる本発明によれば、例えば前記給湯装置の設置時に行われる試運転時に、前記対応関係算出手段により、前記水位検出手段により検出される前記浴槽内の湯水の水位と、前記湯量検出手段により検出される前記浴槽に供給された湯量との対応関係が算出される。そして、前記対応関係が維持されれば、目標湯張り水位に応じた目標湯張り量を前記対応関係に基づいて適切に決定することができる。しかしながら、上述した経年変化による水位センサの検出水位の変動等によって前記対応関係が算出時から変化した場合や、後述するように、前記浴槽の水平断面積が水位に応じて変化する場合には、前記対応関係に基づいて目標湯張り水位に応じた適切な目標湯張り量を求めることができない。そのため、前記水位補正値更新手段によって、前記自動湯張り運転により前記目標湯張り量の湯の供給を行ったときの前記水位検出手段の検出水位と目標湯張り水位との水位差を減少させるように、前記水位補正値を更新することが有効である。   According to the present invention, for example, during a trial operation performed when the hot water supply device is installed, the correspondence calculation means detects the hot water level in the bathtub detected by the water level detection means and the hot water amount detection means. A correspondence relationship with the amount of hot water supplied to the bathtub is calculated. And if the said correspondence is maintained, the target amount of hot water filling according to the target hot water level can be determined appropriately based on the said correspondence. However, when the correspondence changes from the time of calculation due to fluctuations in the water level detected by the water level sensor due to aging described above, or when the horizontal sectional area of the bathtub changes according to the water level, as described later, Based on the correspondence relationship, an appropriate target hot water amount corresponding to the target hot water level cannot be obtained. Therefore, the water level correction value updating means reduces the water level difference between the detected water level of the water level detecting means and the target hot water level when supplying the target hot water amount by the automatic hot water operation. In addition, it is effective to update the water level correction value.

ここで、前記自動湯張り運転によって、前記浴槽に前記目標湯張り量の湯が供給されているときに、前記自動湯張り運転以外の要因(使用者による浴槽への湯水の追加や浴槽からの湯の持ち出し、浴槽の排水等)によって前記浴槽内の湯の水位が変化すると、前記給湯手段により前記目標湯張り量の湯を前記浴槽に供給したときの浴槽内の湯の水位が、目標湯張り量ではなく目標湯張り量+α(自動湯張り運転以外の要因による水位の増減分)に応じたものとなる。そして、この目標湯張り量+αに応じた湯張り水位と前記目標湯張り水位との水位差に基づいて前記水位補正値を更新すると、不適切な水位補正値が設定されてしまう。   Here, when the target amount of hot water is supplied to the bathtub by the automatic hot water operation, factors other than the automatic hot water operation (addition of hot water to the bathtub by the user or from the bathtub) When the water level of the hot water in the bathtub is changed by taking out hot water, draining the bathtub, etc.), the water level of the hot water in the bathtub when the target hot water amount is supplied to the bathtub by the hot water supply means Instead of the amount of tension, it depends on the target amount of hot water filling + α (increase or decrease in water level due to factors other than automatic hot water filling operation). And if the said water level correction value is updated based on the water level difference between the hot water level corresponding to the target hot water amount + α and the target hot water level, an inappropriate water level correction value will be set.

そこで、前記水位補正値更新手段は、前記自動湯張り運転により前記目標湯張り量の湯の供給を行っているときに、前記自動湯張り運転以外の要因によって前記浴槽内の湯の水位が変化したことが検出されたときには、今回の自動湯張り運転における前記水位差に基づく前記補正水位値の更新を行わない。これにより、前記目標湯張り水位に対して不適切な水位補正値が設定されることを防止することができる。   Therefore, the water level correction value updating means changes the water level of the hot water in the bathtub due to a factor other than the automatic hot water operation when supplying the target hot water amount by the automatic hot water operation. When it is detected, the correction water level value is not updated based on the water level difference in the current automatic filling operation. Thereby, it is possible to prevent an inappropriate water level correction value from being set for the target hot water level.

また、前記浴槽に所定量の湯水を供給する補水運転を行う補水手段を備え、
前記水位変化検出手段は、前記補水手段により前記補水運転が実行されたときに、前記浴槽内の湯水の水位が前記自動湯張り運転以外の要因により変化したと検出することを特徴とする。
In addition, a water replenishing means for performing a water replenishment operation for supplying a predetermined amount of hot water to the bathtub,
The water level change detecting means detects that the water level of the hot water in the bathtub has changed due to a factor other than the automatic hot water operation when the water replenishing operation is executed by the water replenishing means.

この構成によれば、前記水位変化検出手段は、前記補水運転により前記浴槽に湯水が供給されることによって前記浴槽内の水位が変化したときに、この変化を前記自動湯張り運転以外の要因によるものとして検出することができる。   According to this configuration, when the water level in the bathtub changes due to the hot water being supplied to the bathtub by the water replenishment operation, the water level change detection means is caused by a factor other than the automatic water filling operation. It can be detected as a thing.

また、前記浴槽内の湯水の減少を検出する減水検出手段を備え、
前記水位変化検出手段は、前記減水検出手段により前記浴槽内の湯水の減少が検出されたときに、前記浴槽内の湯水の水位が前記自動湯張り運転以外の要因により変化したと検出することを特徴とする。
Moreover, the water reduction detection means which detects the reduction | decrease of the hot water in the said bathtub is provided,
The water level change detecting means detects that the water level of the hot water in the bathtub has changed due to a factor other than the automatic hot water operation when the decrease in hot water in the bathtub is detected by the reduced water detecting means. Features.

この構成によれば、例えば、使用者が前記浴槽の排水栓を外した場合や前記浴槽から湯を汲み出した場合に、前記減水検出手段により前記浴槽内の湯水の減少が検出される。そのため、前記水位変化検出手段は、前記減水検出手段により前記浴槽内の湯水の減少が検出されたときに、この湯水の減少による前記浴槽内の湯水の水位の変化を、前記自動湯張り運転以外の要因によるものとして検出することができる。   According to this configuration, for example, when the user removes the drain plug of the bathtub or pumps hot water from the bathtub, a decrease in hot water in the bathtub is detected by the water decrease detection means. Therefore, when the water level change detecting means detects a decrease in the hot water in the bathtub by the water decrease detecting means, the water level change detecting means detects the change in the hot water level in the bathtub due to the decrease in the hot water other than the automatic hot water operation. It can be detected as a result of this factor.

給湯装置の構成図。The block diagram of a hot-water supply apparatus. 湯張り水位の説明図。Explanatory drawing of the hot water level. 自動湯張り運転のフローチャート。Flow chart of automatic hot water operation. 沸き上げ及び水位補正値の更新処理のフローチャート。The flowchart of the update process of a boiling and a water level correction value.

本発明の給湯装置の実施形態について、図1〜図4を参照して説明する。図1を参照して、本実施形態の給湯装置1は、本体5及び本体5と通信ケーブル7によって接続されたリモコン6により構成されている。   An embodiment of a hot water supply apparatus of the present invention will be described with reference to FIGS. Referring to FIG. 1, a hot water supply device 1 according to the present embodiment includes a main body 5 and a remote controller 6 connected to the main body 5 through a communication cable 7.

本体5は、図示しない上水道から給水路11に供給される水を加熱する給湯ユニット10(本発明の給湯手段に相当する)と、浴槽2に貯められた湯水を加熱する追焚きユニット20と、給湯装置1の全体的な作動を制御するコントローラ40とを備えている。   The main body 5 includes a hot water supply unit 10 (corresponding to the hot water supply means of the present invention) for heating water supplied from a water supply (not shown) to the water supply channel 11, a reheating unit 20 for heating hot water stored in the bathtub 2, And a controller 40 that controls the overall operation of the water heater 1.

給湯ユニット10は、給水路11の途中に設けられた給湯熱交換器12と、給湯熱交換器12を加熱する給湯バーナ13と、給湯ユニット10から給水路11に供給される湯の温度を検出する給湯温度センサ19とを備えている。給湯バーナ13に接続されたガス供給路15には、上流側から順に、ガス供給路15を開閉するガス元弁16及び給湯ガス弁17と、給湯バーナ13への燃料ガスの供給流量を変更する給湯流量調節弁18とが設けられている。   The hot water supply unit 10 detects the temperature of hot water supplied to the water supply path 11 from the hot water supply unit 10, the hot water supply heat exchanger 12 provided in the middle of the water supply path 11, the hot water supply burner 13 that heats the hot water supply heat exchanger 12. The hot water supply temperature sensor 19 is provided. In the gas supply path 15 connected to the hot water supply burner 13, the gas source valve 16 and the hot water supply gas valve 17 that open and close the gas supply path 15 and the fuel gas supply flow rate to the hot water supply burner 13 are changed in order from the upstream side. A hot water supply flow rate adjustment valve 18 is provided.

追焚きユニット20は、両端がアダプター60によって浴槽2に接続された追焚き循環路21の途中に設けられた追焚き熱交換器22と、追焚き熱交換器22を加熱する追焚きバーナ23と、浴槽2内の湯水を追焚き循環路21を介して循環させる循環ポンプ24と、追焚き熱交換器22の上流側の追焚き循環路21内の湯水の温度(浴槽2内の湯水の温度)を検出する風呂温度センサ29とを備えている。追焚きバーナ23に接続されたガス供給路15には、上流側から順に、ガス供給路15を開閉する追焚きガス弁27と、追焚きバーナ23への燃料ガスの供給流量を変更する追焚き流量調節弁28とが設けられている。   The chasing unit 20 includes a chasing heat exchanger 22 provided in the middle of the chasing circulation path 21 whose both ends are connected to the bathtub 2 by adapters 60, and a chasing burner 23 for heating the chasing heat exchanger 22. The circulating pump 24 for circulating hot water in the bathtub 2 through the circulation circuit 21 and the temperature of hot water in the circulation circuit 21 upstream of the heating heat exchanger 22 (temperature of hot water in the bathtub 2) ) Is detected. The gas supply path 15 connected to the additional burner 23 includes an additional gas valve 27 that opens and closes the gas supply path 15 in order from the upstream side, and an additional supply that changes the supply flow rate of the fuel gas to the additional burner 23. A flow control valve 28 is provided.

また、追焚き循環路21には、追焚き循環路21を流通する湯水の有無を検知する水流スイッチ25と、浴槽2に貯められた湯水の水位を検出する水位センサ26(本発明の水位検出手段に相当する)とが設けられている。   The recirculation circuit 21 includes a water flow switch 25 that detects the presence or absence of hot water flowing through the recirculation circuit 21, and a water level sensor 26 that detects the water level of hot water stored in the bathtub 2 (the water level detection of the present invention). Corresponding to the means).

給水路11は、給湯熱交換器12よりも下流側の箇所で、湯張り中継路30を介して追焚き循環路21に接続されている。湯張り中継路30には、湯張り中継路30を開閉する湯張り弁31と、給水路11から湯張り中継路30及び追焚き循環路21を経由して浴槽2に供給される湯の流量を検出する流量センサ32とが設けられている。   The water supply passage 11 is connected to the recirculation circulation passage 21 via the hot water filling relay passage 30 at a location downstream of the hot water supply heat exchanger 12. The hot water filling relay passage 30 has a hot water filling valve 31 for opening and closing the hot water filling relay passage 30, and a flow rate of hot water supplied from the water supply passage 11 to the bathtub 2 via the hot water filling relay passage 30 and the additional circulation passage 21. And a flow rate sensor 32 for detecting.

コントローラ40は、図示しないCPU,メモリ,各種インターフェース回路等により構成された電子回路ユニットであり、メモリに保持された給湯装置1の制御用プログラムをCPUで実行することによって、給湯制御手段41、追焚き制御手段42、湯量検出手段43、対応関係算出手段44、目標湯張り量決定手段45、水位補正値更新手段46、水位変化検出手段47、及び減水検出手段48として機能する。これらの手段の動作については後述する。   The controller 40 is an electronic circuit unit including a CPU, a memory, various interface circuits, and the like (not shown). The CPU 40 executes a control program for the hot water supply device 1 held in the memory, so It functions as the sowing control means 42, the hot water amount detection means 43, the correspondence calculation means 44, the target hot water amount determination means 45, the water level correction value update means 46, the water level change detection means 47, and the water decrease detection means 48. The operation of these means will be described later.

リモコン6は、給湯装置1の動作状態等を表示する表示器50、給湯装置1の運転状態(給湯ユニット10及び追焚きユニット20の運転が可能な状態)と待機状態(給湯ユニット10及び追焚きユニット20の運転が不能な状態)への切替を指示するための運転スイッチ51、自動湯張り運転の実行を指示するための湯張りスイッチ52、追焚き運転の実行を指示するための追焚きスイッチ53、給湯温度等の変更を指示するための変更スイッチ54、及び変更スイッチ54による変更対象の切替等を指示するためのモード切替スイッチ55、浴槽2に所定量の湯を供給する足し湯を指示するための足し湯スイッチ56、及び浴槽2に所定量の水の供給する足し水を指示するための足し水スイッチ57を備えている。   The remote controller 6 includes a display 50 that displays an operation state of the hot water supply device 1, an operation state of the hot water supply device 1 (a state in which the hot water supply unit 10 and the reheating unit 20 can be operated) and a standby state (the hot water supply unit 10 and the renewal operation) Operation switch 51 for instructing switching to a state in which the unit 20 cannot be operated), hot water filling switch 52 for instructing execution of automatic hot water filling operation, and reheating switch for instructing execution of chasing operation 53, a change switch 54 for instructing a change in the hot water supply temperature, etc., a mode changeover switch 55 for instructing a change target to be changed by the change switch 54, and an additional hot water for supplying a predetermined amount of hot water to the bathtub 2 And an additional water switch 57 for instructing additional water for supplying a predetermined amount of water to the bathtub 2.

給湯制御手段41は、運転状態において、カラン35の開栓等により上水道から給水路11に水が供給されているときに、リモコン6により設定された目標給湯温度の湯がカラン35等から出湯されるように、給湯温度センサ19の検出温度等に基づいて給湯バーナ13の燃焼量を調節する給湯運転を実行する。   In the operating state, the hot water supply control means 41 discharges hot water at the target hot water temperature set by the remote controller 6 from the curan 35 or the like when water is supplied from the water supply to the water supply channel 11 by opening the curan 35 or the like. As described above, the hot water supply operation for adjusting the combustion amount of the hot water supply burner 13 based on the temperature detected by the hot water supply temperature sensor 19 is executed.

また、給湯制御手段41は、運転状態において、リモコン6の湯張りスイッチ52が操作されたときには、自動湯張り運転を実行する。自動湯張り運転において、給湯制御手段41は、湯張り弁31を開弁すると共に、リモコン6により設定された目標湯張り温度の湯が、給湯ユニット10から湯張り中継路30及び追焚き循環路21を経由して浴槽2に供給されるように、給湯温度センサ19の検出温度等に基づいて、給湯バーナ13の燃焼量を調節する。   Moreover, the hot water supply control means 41 performs an automatic hot water filling operation when the hot water filling switch 52 of the remote controller 6 is operated in the operating state. In automatic hot water filling operation, the hot water supply control means 41 opens the hot water filling valve 31 and hot water at the target hot water filling temperature set by the remote controller 6 is supplied from the hot water supply unit 10 to the hot water filling relay passage 30 and the additional circulation passage. The amount of combustion of the hot water supply burner 13 is adjusted based on the temperature detected by the hot water supply temperature sensor 19 and the like so as to be supplied to the bathtub 2 via 21.

湯量検出手段43は、自動湯張り運転の実行中に、流量センサ32により検出される流量を積算して浴槽2内の湯量を検出する。そして、給湯制御手段41は、湯量検出手段43により検出された湯量が、リモコン6により設定された目標湯張り水位に応じた目標湯張り量になったときに、湯張り弁31を閉弁すると共に給湯バーナ13の燃焼を停止して自動湯張り運転を終了する。なお、給湯制御手段41が自動湯張り運転を実行する構成は、本発明の湯張り制御手段に相当する。   The hot water detection means 43 detects the amount of hot water in the bathtub 2 by integrating the flow rate detected by the flow sensor 32 during execution of the automatic hot water filling operation. Then, the hot water supply control means 41 closes the hot water filling valve 31 when the amount of hot water detected by the hot water amount detection means 43 reaches the target hot water filling amount corresponding to the target hot water filling water level set by the remote controller 6. At the same time, the combustion of the hot water supply burner 13 is stopped and the automatic hot water filling operation is ended. The configuration in which the hot water supply control means 41 executes the automatic hot water filling operation corresponds to the hot water filling control means of the present invention.

また、給湯制御手段41は、リモコン6の足し湯スイッチ56が操作されたときに、湯張り弁31を開弁すると共に給湯バーナ13を燃焼させて、浴槽2に一定量の湯を供給する足し湯運転(本発明の補水運転に相当する)を実行する。さらに、給湯制御手段41は、リモコン6の足し水スイッチ57が操作されたときに、湯張り弁31を開弁して浴槽2に一定量の水を供給する足し水運転(本発明の補水運転に相当する)を実行する。なお、給湯制御手段41が足し湯運転及び足し水運転を実行する構成は、本発明の補水手段に相当する。   Further, the hot water supply control means 41 adds the constant amount of hot water to the bathtub 2 by opening the hot water filling valve 31 and burning the hot water supply burner 13 when the additional hot water switch 56 of the remote controller 6 is operated. A hot water operation (corresponding to the water replenishment operation of the present invention) is performed. Further, the hot water supply control means 41 opens the hot water filling valve 31 and supplies a certain amount of water to the bathtub 2 when the additional water switch 57 of the remote controller 6 is operated (the supplementary water operation of the present invention). Equivalent to). The configuration in which the hot water supply control means 41 performs the addition water operation and the addition water operation corresponds to the water replenishment means of the present invention.

追焚き制御手段42は、リモコン6の追焚きスイッチ53が操作されたときに、循環ポンプ24を作動させて、浴槽2内の湯水を追焚き循環路21を介して循環させた状態とし、追焚きバーナ23を燃焼させることによって、浴槽2内の湯水を加熱する追焚き運転を実行する。追焚き制御手段42は、風呂温度センサ29の検出温度(浴槽2内の湯の温度と等しくなる)が目標湯張り温度になったときに、追焚きバーナ23の燃焼を停止すると共に循環ポンプ24を停止して追焚き運転を終了する。   The chasing control means 42 activates the circulation pump 24 when the chasing switch 53 of the remote controller 6 is operated to bring the hot water in the bathtub 2 into a state of being circulated through the chasing circulation path 21. By burning the burning burner 23, a reheating operation for heating hot water in the bathtub 2 is performed. The reheating control means 42 stops combustion of the reheating burner 23 and the circulation pump 24 when the temperature detected by the bath temperature sensor 29 (equal to the temperature of the hot water in the bathtub 2) reaches the target hot water filling temperature. To stop driving.

対応関係算出手段44は、給湯装置1の設置時に設置作業者によって実行される試運転において、給湯ユニット10から浴槽2に湯供給して、水位センサ26により検出される浴槽2内の湯の水位と、湯量検出手段43により検出される給湯ユニット10から浴槽2に供給された湯量との対応関係を算出する。   The correspondence calculation means 44 supplies hot water from the hot water supply unit 10 to the bathtub 2 in the test operation performed by the installation operator when the hot water supply device 1 is installed, and the water level of the hot water in the bathtub 2 detected by the water level sensor 26. The correspondence relationship with the amount of hot water supplied to the bathtub 2 from the hot water supply unit 10 detected by the hot water amount detection means 43 is calculated.

目標湯張り量決定手段45は、リモコン6の変更スイッチ54及びモード切替スイッチ55の操作に応じて、図2に示したように、基準水位(アダプター60の位置の水位)Lv0よりも50mm高いLv1からLv12まで、水位が次第に高くなる順位が付けられた12段階の切替段のいずれかを、目標湯張り水位として選択する。   As shown in FIG. 2, the target hot water filling amount determining means 45 is 50 mm higher than the reference water level (water level at the position of the adapter 60) Lv0 in accordance with the operation of the change switch 54 and the mode changeover switch 55 of the remote controller 6. From Lv12 to Lv12, one of the 12 switching stages with the ranks in which the water level gradually increases is selected as the target hot water level.

そして、目標湯張り量決定手段45は、目標湯張り水位に水位補正値を加算して補正湯張り水位を求め、この補正湯張り水位を上記対応関係に適用して、補正湯張り水位に対応した湯張り量である目標湯張り量を決定する。ここで、水位補正値の初期値はゼロに設定されている。   Then, the target hot water amount determining means 45 adds the water level correction value to the target hot water level and obtains the corrected hot water level, and applies this corrected hot water level to the above-mentioned correspondence relationship to cope with the corrected hot water level. The target amount of hot water is determined. Here, the initial value of the water level correction value is set to zero.

減水検出手段48は、水位センサ26により浴槽2内に基準水位Lv0よりも高い水位まで水が貯められていることが検出された状態で、水位センサ26による検出水位が継続して減少しているときに、浴槽2の排水栓61が開栓されて浴槽2内の湯水が減少していると検出する。なお、減水検出手段48を、排水栓61の開閉状態をセンサによって直接的に検出する構成としてもよい。   In the state where the water level sensor 26 detects that water is stored in the bathtub 2 up to a water level higher than the reference water level Lv0 by the water level sensor 26, the water level detected by the water level sensor 26 continuously decreases. Sometimes, it is detected that the drain plug 61 of the bathtub 2 is opened and the hot water in the bathtub 2 is decreasing. The water reduction detection means 48 may be configured to directly detect the open / closed state of the drain plug 61 with a sensor.

また、減水検出手段48は、水位センサ26により浴槽2内に基準水位Lv0よりも高い水位まで水が貯められていることが検出された状態で、自動湯張り運転中に、水位センサ26による検出水位が一時的に減少したときに、浴槽2から湯が持ち出されて浴槽2内の湯水が減少したと検出する。   Further, the water level detection means 48 is detected by the water level sensor 26 during the automatic filling operation in a state where the water level sensor 26 detects that water is stored in the bathtub 2 up to a water level higher than the reference water level Lv0. When the water level temporarily decreases, it is detected that hot water has been taken out from the bathtub 2 and the hot water in the bathtub 2 has decreased.

水位変化検出手段47は、給湯制御手段41により足し湯運転又は足し水運転が実行されたとき、及び減水検出手段48により浴槽2内の湯水が減少したことが検出されたときに、浴槽2内の湯水の水位が、自動湯張り運転以外の要因によって変化したと検出する。   The water level change detecting means 47 is provided in the bathtub 2 when the hot water operation or the adding water operation is executed by the hot water supply control means 41 and when the hot water in the bathtub 2 is detected by the water reduction detecting means 48. It is detected that the water level of the hot water has changed due to factors other than automatic hot water operation.

次に、図3及び図4に示したフローチャートに従って、給湯制御手段41による自動湯張り運転の実行手順と、水位補正値更新手段46による水位補正値の更新処理について説明する。   Next, according to the flowcharts shown in FIGS. 3 and 4, the execution procedure of the automatic hot water filling operation by the hot water supply control means 41 and the water level correction value update processing by the water level correction value update means 46 will be described.

図3は自動湯張り運転のフローチャートである。給湯制御手段41は、STEP1で、湯張り弁31を開弁して給湯ユニット10により浴槽2に6リットルの湯を供給する。続くSTEP2で、給湯制御手段41は、循環ポンプ24を作動させて水流スイッチ25がONするか否かを判断する循環判定を行う。   FIG. 3 is a flowchart of the automatic filling operation. In STEP 1, the hot water supply control means 41 opens the hot water filling valve 31 and supplies 6 liters of hot water to the bathtub 2 by the hot water supply unit 10. In subsequent STEP 2, the hot water supply control means 41 performs a circulation determination that determines whether or not the water flow switch 25 is turned on by operating the circulation pump 24.

浴槽2内に基準水位Lv0以上の湯水が貯められているときは、循環ポンプ24の作動により、浴槽2内の湯水が追焚き循環路21を経由して循環するため、水流スイッチ25がONする(循環判定ON)。一方、浴槽2内に基準水位Lv0以上の湯水が貯められていないときには、循環ポンプ24が作動しても、浴槽2内の湯水が追焚き循環路21を経由して循環しないため、水流スイッチ25はOFFになっている(循環判定OFF)。   When hot water of the reference water level Lv0 or more is stored in the bathtub 2, since the hot water in the bathtub 2 circulates through the tracking circuit 21 by the operation of the circulation pump 24, the water flow switch 25 is turned on. (Circulation determination ON). On the other hand, when hot water of the reference water level Lv0 or higher is not stored in the bathtub 2, the hot water in the bathtub 2 is not circulated through the recirculation circuit 21 even if the circulation pump 24 is operated. Is OFF (circulation determination OFF).

循環判定ON(浴槽2内に基準水位Lv0以上の湯水が貯められている)であるときはSTEP10に分岐し、給湯制御手段41は、水位センサ26により浴槽2内の湯水の水位(現在水位)を検知する。続くSTEP11で、給湯制御手段41は、目標湯張り水位に補正水位値を加算した補正湯張り水位から現在水位を減じて両者の水位差を算出し、この水位差を上記対応関係に適用して、目標湯張り量に対する不足湯量を算出する。   When the circulation determination is ON (the hot water of the reference water level Lv0 or higher is stored in the bathtub 2), the process branches to STEP 10, and the hot water supply control means 41 uses the water level sensor 26 to determine the hot water level in the bathtub 2 (current water level). Is detected. In subsequent STEP 11, the hot water supply control means 41 subtracts the current water level from the corrected hot water level obtained by adding the corrected water level value to the target hot water level, calculates the water level difference between them, and applies this water level difference to the above correspondence relationship. Then, the amount of hot water shortage with respect to the target hot water filling amount is calculated.

そして、続くSTEP12で、給湯制御手段41は、給湯ユニット10から浴槽2に対して、STEP11で算出した不足湯量分の給湯を行い、図4のSTEP13に進む。これにより、給湯制御手段41は、補正湯張り水位に対応した浴槽2への湯張りを行う。   Then, in subsequent STEP 12, the hot water supply control means 41 supplies hot water for the amount of insufficient hot water calculated in STEP 11 from the hot water supply unit 10 to the bathtub 2, and proceeds to STEP 13 in FIG. Thereby, the hot water supply control means 41 performs hot water filling to the bathtub 2 corresponding to the correction hot water filling water level.

一方、STEP2で、循環判定がOFFであったときにはSTEP3に進み、給湯制御手段41は、基準水位Lv0+5cmの水位分の湯を、給湯ユニット10から浴槽2に供給する。そして、続くSTEP4で循環判定を再度行い、循環判定ONであったときはSTEP10に分岐し、循環判定OFFであったときにはSTEP5に進む。   On the other hand, when the circulation determination is OFF in STEP 2, the process proceeds to STEP 3, and the hot water supply control means 41 supplies hot water corresponding to the reference water level Lv0 + 5 cm from the hot water supply unit 10 to the bathtub 2. Then, the circulation determination is performed again in STEP4. If the circulation determination is ON, the process branches to STEP10. If the circulation determination is OFF, the process proceeds to STEP5.

STEP5で、給湯制御手段41は、給湯ユニット10から浴槽2に10リットルの湯を供給する。そして続くSTEP6で循環判定を行い、循環判定がONであったときはSTEP30に分岐し、給湯制御手段41は、さらに10リットルの湯を浴槽2に供給する。次のSTEP31で、給湯制御手段41は循環判定を行い、循環判定がONであったときはSTEP10に進み、循環判定がOFFであったときにはSTEP7に分岐する。   In STEP 5, the hot water supply control means 41 supplies 10 liters of hot water from the hot water supply unit 10 to the bathtub 2. Then, the circulation determination is performed in the subsequent STEP 6, and when the circulation determination is ON, the process branches to STEP 30, and the hot water supply control means 41 supplies 10 liters of hot water to the bathtub 2. At the next STEP 31, the hot water supply control means 41 performs circulation determination. When the circulation determination is ON, the process proceeds to STEP 10, and when the circulation determination is OFF, the process branches to STEP 7.

STEP7で、給湯制御手段41は、STEP5及びSTEP30における浴槽2への10リットルずつの湯張りの積算量が50リットル以下であるか否かを判断する。そして、積算量が50リットル以下であるときはSTEP5に戻る。一方、積算量が50リットルを超えたときには、浴槽2の排水栓61が開栓されている可能性が高く、この場合には浴槽2に湯を張ることができない。そこでSTEP8に進み、給湯制御手段41は、自動湯張り運転を中止して、リモコン6の表示器50にエラー表示をすると共にブザー(図示しない)を鳴動させるエラー処理を行う。   In STEP 7, the hot water supply control means 41 determines whether or not the integrated amount of hot water filling every 10 liters to the bathtub 2 in STEP 5 and STEP 30 is 50 liters or less. When the integrated amount is 50 liters or less, the process returns to STEP5. On the other hand, when the integrated amount exceeds 50 liters, there is a high possibility that the drain plug 61 of the bathtub 2 is opened. In this case, hot water cannot be applied to the bathtub 2. Accordingly, the process proceeds to STEP 8 where the hot water supply control means 41 stops the automatic hot water filling operation, performs an error process for displaying an error on the display 50 of the remote controller 6 and sounding a buzzer (not shown).

図4のSTEP13及びSTEP20〜STEP21は、浴槽2内の湯の温度が、リモコン6により設定された目標湯張り温度よりも低いときに、浴槽2内の湯を目標湯張り温度まで沸き上げる処理である。給湯制御手段41は、STEP13で風呂温度センサ29により検出される浴槽2内の湯の温度が目標湯張り温度以上であるか否かを判断する。   STEP 13 and STEP 20 to STEP 21 in FIG. 4 are processes for boiling the hot water in the bathtub 2 to the target hot water temperature when the temperature of the hot water in the bathtub 2 is lower than the target hot water temperature set by the remote controller 6. is there. The hot water supply control means 41 determines whether or not the temperature of hot water in the bathtub 2 detected by the bath temperature sensor 29 in STEP 13 is equal to or higher than the target hot water filling temperature.

そして、浴槽2内の湯の温度が目標湯張り温度以上であるときはSTEP14に進み、浴槽2内の湯の温度が目標湯張り温度よりも低いときにはSTEP20に分岐する。STEP20〜STEP21は、追焚き制御手段42による処理である。追焚き制御手段42は、STEP21で浴槽2内の湯の温度が目標湯張り温度以上となるまで、STEP20で、循環ポンプ24を作動させると共に追焚きバーナ23を燃焼させて、追焚き循環路21を経由して循環される浴槽2内の湯を加熱する追焚き運転を実行する。そして、風呂温度が目標湯張り温度以上になったときに、追焚き運転を終了してSTEP14に進む。   And when the temperature of the hot water in the bathtub 2 is more than the target hot water temperature, it progresses to STEP14, and when the temperature of the hot water in the bathtub 2 is lower than the target hot water temperature, it branches to STEP20. STEP 20 to STEP 21 are processes performed by the tracking control unit 42. The reheating control means 42 operates the circulation pump 24 and burns the reheating burner 23 in STEP 20 until the temperature of the hot water in the bathtub 2 becomes equal to or higher than the target hot water filling temperature in STEP 21, and the reheating circulation path 21. A reheating operation for heating the hot water in the bathtub 2 circulated through the tub is executed. When the bath temperature becomes equal to or higher than the target hot water temperature, the chasing operation is terminated and the process proceeds to STEP14.

STEP14〜STEP16は、水位補正値更新手段46による処理である。水位補正値更新手段46は、STEP14で、自動湯張り運転中に、水位変化検出手段47によって、自動湯張り運転以外の要因による浴槽2内の湯の水位の変化が検出されたか否かを判断する。   STEP 14 to STEP 16 are processes by the water level correction value update means 46. The water level correction value updating means 46 determines in STEP 14 whether or not a change in the water level of the hot water in the bathtub 2 due to a factor other than the automatic water filling operation is detected by the water level change detecting means 47 during the automatic water filling operation. To do.

そして、水位変化検出手段47により浴槽2内の湯の水位の変化が検出されなかったときは、浴槽2内の湯の水位は、補正湯張り水位を上記対応関係に適用して設定した目標湯張り量に対応したものとなっている。そこで、続くSTEP15において、水位補正値更新手段46は、水位センサ26により検出されている現在の浴槽2内の湯の水位(現在水位、自動湯張り運転終了時の水位)が、目標湯張り水位から10mm低い水位閾値よりも低いか否かを判断する。   And when the change in the water level of the hot water in the bathtub 2 is not detected by the water level change detecting means 47, the hot water level in the bathtub 2 is the target hot water set by applying the corrected hot water level to the corresponding relationship. It corresponds to the amount of tension. Therefore, in the subsequent STEP 15, the water level correction value updating means 46 determines that the current hot water level in the bathtub 2 (current water level, water level at the end of the automatic hot water operation) detected by the water level sensor 26 is the target hot water level. It is judged whether it is lower than the water level threshold value 10 mm lower.

そして、現在水位が水位閾値よりも低いとき(目標湯張り水位に対して、自動湯張り運転により浴槽2に供給された湯の水位の不足度合が大きいとき)は、STEP16に進み、水位補正値更新手段46は、現在水位と目標湯張り水位との水位差を減少させるために、以下の式(1)によって、水位補正値ΔHを更新してSTEP17に進み、水位補正値更新手段46は処理を終了する。   When the current water level is lower than the water level threshold (when the degree of deficiency of the water level of the hot water supplied to the bathtub 2 by the automatic hot water operation is large with respect to the target hot water level), the process proceeds to STEP 16 and the water level correction value is reached. The update means 46 updates the water level correction value ΔH according to the following equation (1) and proceeds to STEP 17 in order to reduce the water level difference between the current water level and the target hot water level, and the water level correction value update means 46 performs processing. Exit.

ΔH(t)=ΔH(t−1)+(Ha−Hs)/2 ・・・・・(1)
但し、ΔH(t):更新後の水位補正値、ΔH(t−1):更新前の水位補正値、Ha:目標湯張り水位、Hs:自動湯張り運転終了時の湯張り水位)。
ΔH (t) = ΔH (t−1) + (Ha−Hs) / 2 (1)
Where ΔH (t): water level correction value after update, ΔH (t−1): water level correction value before update, Ha: target hot water level, Hs: hot water level at the end of automatic hot water operation.

なお、上記式(1)の右辺の第2項((Ha−Hs)/2)は、現在水位と目標湯張り水位との水位差を減少させる値であればよく、固定値でもよい。   The second term ((Ha−Hs) / 2) on the right side of the formula (1) may be a value that reduces the difference in water level between the current water level and the target hot water level, and may be a fixed value.

一方、現在水位が水位閾値以上であるとき(目標湯張り水位に対して、自動湯張り運転により浴槽2に供給された湯の水位の不足度合が小さいとき)には、水位補正値を更新する必要がないため、STEP14からSTEP17に分岐して水位補正値更新手段46は処理を終了する。   On the other hand, when the current water level is equal to or higher than the water level threshold (when the degree of water level deficiency of the hot water supplied to the bathtub 2 by the automatic hot water operation is small relative to the target hot water level), the water level correction value is updated. Since there is no need, STEP 14 branches to STEP 17 and the water level correction value updating means 46 ends the process.

また、STEP14で、水位変化検出手段47により、自動湯張り運転以外の要因による浴槽2内の湯の水位の変化が検出されたときは、浴槽2内の湯の水位は、補正湯張り水位を上記対応関係に適用して設定した目標湯張り量に対応したものになっていない。そして、この場合に、上記式(1)によって水位補正値を更新すると、不適切な水位補正値が設定されてしまう。   Further, in STEP 14, when the water level change detecting means 47 detects a change in the hot water level in the bathtub 2 due to a factor other than the automatic hot water operation, the hot water level in the bathtub 2 is set to the corrected hot water level. It does not correspond to the target hot water amount set by applying to the above correspondence. In this case, if the water level correction value is updated by the above equation (1), an inappropriate water level correction value is set.

そのため、この場合はSTEP17に分岐して処理を終了し、水位補正値更新手段46は、今回の自動湯張り運転の終了時の水位と目標湯張り水位との水位差に基づく水位補正値の更新を行わない。これにより、目標湯張り水位に対して、不適切な水位補正値が設定されることを防止することができる。   Therefore, in this case, the process branches to STEP 17 and the processing is terminated, and the water level correction value updating means 46 updates the water level correction value based on the water level difference between the water level at the end of this automatic hot water filling operation and the target hot water level. Do not do. Thereby, it is possible to prevent an inappropriate water level correction value from being set for the target hot water level.

なお、本実施形態では、本発明の給湯手段として、給水路11を流通する水を給湯熱交換器12により加熱する連続フロー式の給湯ユニット10を示したが、貯湯式等の他の構成による給湯手段を用いてもよい。   In addition, in this embodiment, although the continuous flow type hot water supply unit 10 which heats the water which distribute | circulates the water supply path 11 with the hot water supply heat exchanger 12 was shown as a hot water supply means of this invention, it is based on other structures, such as a hot water storage type. Hot water supply means may be used.

1…給湯装置、2…浴槽、10…給湯ユニット(給湯手段)、40…コントローラ、41…給湯制御手段(湯張り制御手段、補水手段)、42…追焚き制御手段、43…湯量検出手段、44…対応関係算出手段、45…目標湯張り量決定手段、46…水位補正値更新手段、47…水位変化検出手段、48…減水検出手段。   DESCRIPTION OF SYMBOLS 1 ... Hot-water supply apparatus, 2 ... Bathtub, 10 ... Hot-water supply unit (hot-water supply means), 40 ... Controller, 41 ... Hot-water supply control means (hot water control means, supplemental water means), 42 ... Reheating control means, 43 ... Hot water amount detection means, 44 ... correspondence calculating means, 45 ... target hot water amount determining means, 46 ... water level correction value updating means, 47 ... water level change detecting means, 48 ... water reduction detecting means.

Claims (3)

浴槽に湯を供給する給湯手段と、
前記浴槽内の湯水の水位を検出する水位検出手段と、
前記給湯手段から前記浴槽に供給された湯量を検出する湯量検出手段と、
前記給湯手段により前記浴槽に湯を供給して、前記水位検出手段により検出される前記浴槽内の湯水の水位と、前記湯量検出手段により検出される前記浴槽に供給された湯量との対応関係を算出する対応関係算出手段と、
所定の目標湯張り水位と該目標湯張り水位を調節するための水位補正値とに基づいて設定された補正湯張り水位に対応する目標湯張り量を、前記対応関係に基づいて決定する目標湯張り量決定手段と、
前記給湯手段により前記浴槽に前記目標湯張り量の湯を供給する自動湯張り運転を実行する湯張り制御手段と、
前記自動湯張り運転により前記目標湯張り量の湯を前記浴槽に供給したときの前記水位検出手段の検出水位と、前記目標湯張り水位との水位差を減少させるように、前記水位補正値を更新する水位補正値更新手段とを備えた給湯装置であって、
前記自動湯張り運転以外の要因による前記浴槽内の湯水の水位の変化を検出する水位変化検出手段を備え、
前記水位補正値更新手段は、前記自動湯張り運転の実行中に、前記水位変化検出手段により前記自動湯張り運転以外の要因による前記浴槽内の湯水の水位の変化が検出されたときには、今回の自動湯張り運転における前記水位差に基づく前記水位補正値の更新を行わないことを特徴とする給湯装置。
A hot water supply means for supplying hot water to the bathtub;
Water level detection means for detecting the level of hot water in the bathtub;
Hot water detection means for detecting the amount of hot water supplied to the bathtub from the hot water supply means;
Hot water is supplied to the bathtub by the hot water supply means, and the correspondence between the hot water level in the bathtub detected by the water level detection means and the amount of hot water supplied to the bathtub detected by the hot water detection means Correspondence calculating means for calculating;
A target hot water amount that determines a target hot water amount corresponding to a corrected hot water level set based on a predetermined target hot water level and a water level correction value for adjusting the target hot water level based on the correspondence relationship. Tension amount determining means;
Hot water filling control means for executing automatic hot water filling operation for supplying hot water of the target hot water amount to the bathtub by the hot water supply means;
The water level correction value is set so as to reduce the difference between the detected water level of the water level detecting means and the target hot water level when the target hot water amount is supplied to the bathtub by the automatic hot water operation. A hot water supply device comprising a water level correction value updating means for updating,
Water level change detecting means for detecting a change in the water level of the hot water in the bathtub due to factors other than the automatic hot water operation,
When the water level correction value updating means detects a change in the water level of the hot water in the bathtub due to a factor other than the automatic water filling operation by the water level change detection means during execution of the automatic water filling operation, The hot water supply apparatus, wherein the water level correction value is not updated based on the water level difference in the automatic hot water operation.
請求項1に記載の給湯装置において、
前記浴槽に所定量の湯水を供給する補水運転を行う補水手段を備え、
前記水位変化検出手段は、前記補水手段により前記補水運転が実行されたときに、前記浴槽内の湯水の水位が前記自動湯張り運転以外の要因により変化したと検出することを特徴とする給湯装置。
The hot water supply apparatus according to claim 1,
Comprising water replenishing means for performing a water replenishment operation for supplying a predetermined amount of hot water to the bathtub;
The water level change detecting means detects that the water level in the bathtub has changed due to a factor other than the automatic hot water operation when the water replenishing operation is executed by the water replenishing means. .
請求項1に記載の給湯装置において、
前記浴槽内の湯水の減少を検出する減水検出手段を備え、
前記水位変化検出手段は、前記減水検出手段により前記浴槽内の湯水の減少が検出されたときに、前記浴槽内の湯水の水位が前記自動湯張り運転以外の要因により変化したと検出することを特徴とする給湯装置。
The hot water supply apparatus according to claim 1,
Comprising a reduced water detecting means for detecting a decrease in hot water in the bathtub;
The water level change detecting means detects that the water level of the hot water in the bathtub has changed due to a factor other than the automatic hot water operation when the decrease in hot water in the bathtub is detected by the reduced water detecting means. A hot water supply device.
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JP2016075447A (en) * 2014-10-08 2016-05-12 リンナイ株式会社 Water heater
JP2020173466A (en) * 2016-07-22 2020-10-22 大日本印刷株式会社 Wavelength conversion sheet and barrier film used therein

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JP2010276253A (en) * 2009-05-28 2010-12-09 Panasonic Corp Water heater including bath automatic function
JP2012127556A (en) * 2010-12-14 2012-07-05 Daikin Industries Ltd Hot-water supply system

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JP2010276253A (en) * 2009-05-28 2010-12-09 Panasonic Corp Water heater including bath automatic function
JP2012127556A (en) * 2010-12-14 2012-07-05 Daikin Industries Ltd Hot-water supply system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016075447A (en) * 2014-10-08 2016-05-12 リンナイ株式会社 Water heater
JP2020173466A (en) * 2016-07-22 2020-10-22 大日本印刷株式会社 Wavelength conversion sheet and barrier film used therein

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