JP2018066526A - Water heater - Google Patents

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JP2018066526A
JP2018066526A JP2016206516A JP2016206516A JP2018066526A JP 2018066526 A JP2018066526 A JP 2018066526A JP 2016206516 A JP2016206516 A JP 2016206516A JP 2016206516 A JP2016206516 A JP 2016206516A JP 2018066526 A JP2018066526 A JP 2018066526A
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outside air
air temperature
circulation pump
water heater
guidance
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JP6737125B2 (en
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洋真 黒柳
Hiromasa Kuroyanagi
洋真 黒柳
一樹 池田
Kazuki Ikeda
一樹 池田
真行 須藤
Masayuki Sudo
真行 須藤
智樹 坂上
Tomoki Sakanoue
智樹 坂上
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a user-friendly water heater by clarifying an action to be taken by a user when a pump of the water heater is not driven.SOLUTION: A water heater includes: heating means 2 for heating a heating medium; outside air temperature detection means 2a for detecting an outside air temperature; a circulation circuit 3 that is connected to the heating means 2 and in which the heating medium is circulated; a circulation pump 4 provided in the circulation circuit 3 to circulate the heating medium in the circulation circuit 3; a control section 24 for controlling the circulation pump 4 and the heating means 2; and a notification section 25 electrically connected to the control section 24 and capable of notifying a user of an operating state. In the case where the circulation pump 4 is not driven even when a drive command is given to the circulation pump 4, if the outside air temperature detected by the outside air temperature detection means 2a is a predetermined threshold value or more, the control section 24 notifies a first guidance indicating that there is a possibility of natural de-icing through the notification section 25. If the outside air temperature detected by the outside air temperature detection means 2a is less than the predetermined threshold value, the control section notifies a second guidance indicating that there is no possibility of natural de-icing through the notification section 25.SELECTED DRAWING: Figure 3

Description

本発明は、給湯機に関するものである。   The present invention relates to a water heater.

従来の給湯機には、貯湯タンクとヒートポンプ間の湯水を循環するためにヒートポンプ循環ポンプが設置してあり、このヒートポンプ循環ポンプに一定電圧を印加し動作指示を行っている状態で動作が確認できない（回転数を検出できない）場合に、ヒートポンプ循環ポンプが故障している旨をリモコン等の報知手段によって使用者に報知していた。   In a conventional water heater, a heat pump circulation pump is installed to circulate hot water between the hot water storage tank and the heat pump, and the operation cannot be confirmed in a state where a constant voltage is applied to the heat pump circulation pump and an operation instruction is given. In the case where the rotation speed cannot be detected, the user is informed by a notification means such as a remote controller that the heat pump circulation pump has failed.

また、ポンプに動作指示を行っている状態で、動作が確認できず、かつ外気温が低いときはポンプ内残水が凍結したと判断し、解氷のためにポンプに断続的に通電するものがあった。   Also, when operation is not being confirmed with the pump instructed, and when the outside air temperature is low, it is determined that the residual water in the pump has frozen and the pump is energized intermittently for de-icing was there.

特開２００８―２５８８２号公報JP 2008-25882 A

従来の給湯機は、発生時の外気温状況によらず故障と判断して使用者に報知するため、例えば原因が故障ではなく単純な凍結によるものであっても、使用者は販売店等への修理依頼連絡をし、復旧には販売店等の作業または確認を待つ必要があり、再び使用可能になるまで多大な時間を要する。   Since conventional hot water heaters are determined to be malfunctioning regardless of the outside air temperature conditions at the time of occurrence, the user is notified, for example, even if the cause is not malfunction but due to simple freezing, the user should go to a store etc. In order to recover, it is necessary to wait for the work or confirmation of the dealer or the like, and it takes a long time until it can be used again.

また上記特許文献１にあるような通電による解氷も、復帰まで長時間を要し、その間使用者は給湯機を使用出来ないだけでなく、自然解氷を待つか否か、使用者がどの様に対処すべきかが明確でない。   In addition, the de-icing by energization as described in Patent Document 1 also takes a long time to return, during which the user cannot use the water heater, and whether the user waits for the natural de-icing It is not clear how to deal with.

本発明は、上記のような問題点を解決するもので、給湯機のポンプが駆動しない場合に、使用者が取るべきアクションを明確にして、使い勝手の良い給湯機を得ることを目的としている。   An object of the present invention is to solve the above-described problems and to provide an easy-to-use hot water heater by clarifying an action to be taken by a user when a pump of the hot water heater is not driven.

熱媒を加熱する加熱手段と、外気温度を検出する外気温検出手段と、加熱手段に接続され、熱媒が循環する循環回路と、循環回路に設けられ、循環回路に熱媒を循環させる循環ポンプと、循環ポンプと加熱手段を制御する制御部と、制御部に電気的に接続され、動作状態を使用者に報知可能な報知部と、を備え、制御部は、循環ポンプに駆動指示を与えても循環ポンプが駆動しない場合に、外気温検出手段で検出した外気温が、所定の閾値以上であれば、自然解氷見込み有を主旨とする第一ガイダンスを報知部で報知し、外気温検出手段で検出した外気温が、所定の閾値未満であれば、自然解氷見込み無を主旨とする第二ガイダンスを報知部で報知するものである。   A heating means for heating the heating medium, an outside air temperature detecting means for detecting the outside air temperature, a circulation circuit connected to the heating means and circulating the heating medium, and a circulation provided in the circulation circuit for circulating the heating medium in the circulation circuit A control unit that controls the pump, the circulation pump and the heating means, and a notification unit that is electrically connected to the control unit and can notify the user of the operation state, and the control unit gives a drive instruction to the circulation pump. If the outside air temperature detected by the outside air temperature detecting means is equal to or higher than a predetermined threshold when the circulation pump is not driven even if it is given, the informing unit informs the first guidance mainly on the possibility of natural ice melting. If the outside air temperature detected by the air temperature detecting means is less than a predetermined threshold value, the notifying unit notifies the second guidance mainly indicating that natural ice melting is not expected.

本発明によれば、給湯機のポンプが駆動しない場合に、使用者が取るべきアクションを明確にして、使い勝手の良い給湯機を得ることができる。   ADVANTAGE OF THE INVENTION According to this invention, when the pump of a hot water supply device does not drive, the action which a user should take can be clarified and a hot water supply device with good usability can be obtained.

本発明の実施の形態１を示す給湯機の構成図である。It is a block diagram of the water heater which shows Embodiment 1 of this invention. 本発明の実施の形態１を示す給湯機のリモコンに表示するガイダンスの例（ａ），（ｂ），（ｃ）、（ｄ）である。It is an example (a), (b), (c), (d) of the guidance displayed on the remote control of the water heater which shows Embodiment 1 of this invention. 本発明の実施の形態１を示す給湯機の動作のフローチャートである。It is a flowchart of operation | movement of the water heater which shows Embodiment 1 of this invention. 本発明の実施の形態２を示す給湯機の動作のフローチャートである。It is a flowchart of operation | movement of the water heater which shows Embodiment 2 of this invention.

以下、本発明の具体的内容について、図１から４を用いて説明する。なお、各図において同一部分または相当部分は同一符号を付し、詳細な説明を省略する。   The specific contents of the present invention will be described below with reference to FIGS. In addition, in each figure, the same part or an equivalent part attaches | subjects the same code | symbol, and abbreviate | omits detailed description.

実施の形態１．
図１は、本発明の実施の形態１における貯湯式給湯機の構成図である。図１において、貯湯タンク１は、その下部と上部に加熱循環回路３が接続されており、加熱循環回路３は途中に加熱手段であるヒートポンプユニット２を備えている。ヒートポンプユニット２内には、圧縮機、給湯用熱交換器、膨張弁、空気熱交換器を順次冷媒配管で接続したヒートポンプ回路（いずれも図示省略）を備えている。また、ヒートポンプユニット２には、外気温度を検出する外気温センサ２ａが設けられている。加熱循環回路３は貯湯タンク１の上下部をヒートポンプユニット２に接続し、貯湯タンク１の下部とヒートポンプユニット２との間にはヒートポンプ循環ポンプ４が設けられ、貯湯タンク１の下部から取り出した水をヒートポンプユニット２内に導き、ヒートポンプユニット２内で高温の湯に沸き上げて（加熱して）貯湯タンク１の上部に戻している。ここで、沸き上げの動作は、一般的に電気料金の割安な深夜電力時間帯を中心に実施し、翌日のお湯の使用分を貯湯タンク１に貯湯するように実施する。 Embodiment 1 FIG.
FIG. 1 is a configuration diagram of a hot water storage type hot water supply apparatus according to Embodiment 1 of the present invention. In FIG. 1, a hot water storage tank 1 has a heating circulation circuit 3 connected to the lower and upper portions thereof, and the heating circulation circuit 3 includes a heat pump unit 2 serving as a heating means on the way. The heat pump unit 2 includes a heat pump circuit (not shown) in which a compressor, a hot water supply heat exchanger, an expansion valve, and an air heat exchanger are sequentially connected by a refrigerant pipe. The heat pump unit 2 is provided with an outside air temperature sensor 2a that detects the outside air temperature. The heating circulation circuit 3 connects the upper and lower parts of the hot water storage tank 1 to the heat pump unit 2, and a heat pump circulation pump 4 is provided between the lower part of the hot water storage tank 1 and the heat pump unit 2, and the water taken out from the lower part of the hot water storage tank 1. Is introduced into the heat pump unit 2, boiled (heated) into hot water in the heat pump unit 2, and returned to the upper part of the hot water storage tank 1. Here, the boiling operation is generally performed mainly in the late-night power hours when electricity charges are cheap, and the hot water used the next day is stored in the hot water storage tank 1.

貯湯タンク１の外周には、貯湯タンク１の上部から貯湯タンクの容積の０リットル、５０リットル、１００リットル、１５０リットルの位置に第１〜第４の温度センサ５ａ〜５ｄが設けられている。また、加熱循環回路３の貯湯タンク１の下部と接続する側の配管上に第５の温度センサ５ｅが設けられている。第１〜第５の温度センサ５ａ〜５ｅは貯湯タンク１内の残湯熱量を検出する残湯熱量検出手段として機能し、その位置の湯の温度を検知する。貯湯タンク温度センサ６は貯湯タンク１の上部に設けられ、ヒートポンプユニット２によって加熱されて貯湯タンク１の上部に戻される湯の温度を検知する。   On the outer periphery of the hot water storage tank 1, first to fourth temperature sensors 5 a to 5 d are provided at positions of 0 liter, 50 liter, 100 liter and 150 liter of the hot water storage tank from the upper part of the hot water storage tank 1. A fifth temperature sensor 5e is provided on the pipe on the side connected to the lower part of the hot water storage tank 1 of the heating circuit 3. The first to fifth temperature sensors 5a to 5e function as a remaining hot water heat amount detecting means for detecting the remaining hot water heat amount in the hot water storage tank 1, and detect the temperature of the hot water at that position. The hot water storage tank temperature sensor 6 is provided in the upper part of the hot water storage tank 1 and detects the temperature of the hot water heated by the heat pump unit 2 and returned to the upper part of the hot water storage tank 1.

一般給湯側電動混合弁７は、貯湯タンク１の上部に接続された給湯管８と、水道管等の水源に接続された給水管９に接続されており、貯湯タンク１からの高温湯と水源からの水を適温に混合し、蛇口等の給湯負荷に接続された混合給湯管１０に適温の湯を供給する。   The general hot water supply side electric mixing valve 7 is connected to a hot water supply pipe 8 connected to the upper part of the hot water storage tank 1 and a water supply pipe 9 connected to a water source such as a water pipe. Is mixed with water at an appropriate temperature, and hot water with an appropriate temperature is supplied to a mixed hot water supply pipe 10 connected to a hot water supply load such as a faucet.

給水管９には、給水温度センサ２３が設けられ、給水管９を流れる水の温度を検知し、混合給湯管１０には、給湯用流量センサ１９と給湯用温度センサ２０が設けられ、混合給湯管１０を流れる湯の流量と温度を検知する。   The water supply pipe 9 is provided with a water supply temperature sensor 23 to detect the temperature of the water flowing through the water supply pipe 9, and the mixed hot water supply pipe 10 is provided with a hot water supply flow rate sensor 19 and a hot water supply temperature sensor 20. The flow rate and temperature of hot water flowing through the pipe 10 are detected.

風呂給湯側電動混合弁１１は、貯湯タンク１の上部に接続された給湯管８と、水道管等の水源に接続された給水管９に接続されており、貯湯タンク１からの高温湯と水源からの水を適温に混合し、混合風呂管１８、風呂側循環回路１２を経由して浴槽（図示せず）に適温の湯を供給し、適量となったところで電磁弁１３により供給を停止し湯張りを行う。   The hot water supply side electric mixing valve 11 is connected to a hot water supply pipe 8 connected to the upper part of the hot water storage tank 1 and a water supply pipe 9 connected to a water source such as a water pipe. Is mixed with water at an appropriate temperature, hot water is supplied to the bathtub (not shown) via the mixed bath pipe 18 and the bath-side circulation circuit 12, and the supply is stopped by the solenoid valve 13 when the appropriate amount is reached. Perform hot water filling.

混合風呂管１８には、風呂用流量センサ２１と風呂用温度センサ２２が設けられ、混合風呂管１８を流れる湯の流量と温度を検知する。   The mixed bath pipe 18 is provided with a bath flow sensor 21 and a bath temperature sensor 22 to detect the flow rate and temperature of hot water flowing through the mixed bath pipe 18.

風呂側循環回路１２は、風呂循環ポンプ１４により浴槽から浴水を引き込み、熱交換器１５を経由して浴槽に戻る経路である。また、タンク側循環回路１６は、貯湯タンク１の上部からタンク内の湯をタンク循環ポンプ１７で引き込み、熱交換器１５を経由して貯湯タンク１の下部に繋がる経路である。ここで、風呂循環ポンプ１４により風呂側循環回路１２に浴槽から引き込まれた浴水は、タンク循環ポンプ１７によりタンク側循環回路１６に貯湯タンク１の上部から引き込まれた高温湯と、熱交換器１５を介して熱交換されて浴槽に戻り、浴水が適温となったところで風呂循環ポンプ１４とタンク循環ポンプ１７の動作を停止する、追い焚き運転を行うことができる。   The bath-side circulation circuit 12 is a path that draws bath water from the bathtub by the bath circulation pump 14 and returns to the bathtub via the heat exchanger 15. The tank-side circulation circuit 16 is a path that draws hot water in the tank from the upper part of the hot water storage tank 1 by the tank circulation pump 17 and connects to the lower part of the hot water storage tank 1 via the heat exchanger 15. Here, the bath water drawn from the bathtub into the bath side circulation circuit 12 by the bath circulation pump 14 is replaced with hot water drawn into the tank side circulation circuit 16 from the upper part of the hot water storage tank 1 by the tank circulation pump 17 and a heat exchanger. After the heat is exchanged through 15, the bath returns to the bathtub, and the bath circulation pump 14 and the tank circulation pump 17 are stopped when the bath water reaches an appropriate temperature.

制御部２４は、ヒートポンプユニット２、外気温センサ２ａ、ヒートポンプ循環ポンプ４、第１〜第５の温度センサ５ａ〜５ｅ、貯湯タンク温度センサ６、一般給湯側電動混合弁７、風呂給湯側電動混合弁１１、電磁弁１３、風呂循環ポンプ１４、タンク循環ポンプ１７、給湯用流量センサ１９、給湯用温度センサ２０、風呂用流量センサ２１、風呂用温度センサ２２、給水温度センサ２３、リモコン２５と電気的に接続されており、各々との信号の授受や各々の動作を制御している。また、制御部２４は、自然解氷見込み判定手段２４ａと、外気温度記憶手段２４ｂと、動作実績記憶手段２４ｃを備えている。外気温度記憶手段２４ｂは、外気温センサ２ａで検出した外気温度を記憶する。自然解氷見込み判定手段２４ａは、外気温センサ２ａで検出した外気温度の変化、または外気温度記憶手段２４ｂで記憶した外気温度と外気温度センサ２ａでの検出値を比較することで、自然解氷の見込みがあるかを判断する（詳細は後述）。また、動作実績記憶手段２４ｃは、貯湯式給湯機が設置されて、ヒートポンプユニット２による貯湯タンク１への貯湯運転が行われた実績があるかどうかを、動作実績として記憶するものである。ここで、動作実績記憶手段２４ｃに動作実績が記憶されているということは、貯湯式給湯機が正常に設置され給水源や蛇口、浴槽等に接続され、電気工事も完了し、ヒートポンプ循環ポンプ２が１度でも正常に動作したことがあるということを意味し、一般的な凍結防止のための対策がなされていることを意味する。   The control unit 24 includes a heat pump unit 2, an outside air temperature sensor 2a, a heat pump circulation pump 4, first to fifth temperature sensors 5a to 5e, a hot water storage tank temperature sensor 6, a general hot water supply side electric mixing valve 7, and a hot water supply side electric mixing. Valve 11, solenoid valve 13, bath circulation pump 14, tank circulation pump 17, hot water flow sensor 19, hot water temperature sensor 20, bath flow sensor 21, bath temperature sensor 22, water supply temperature sensor 23, remote controller 25 and electric Are connected to each other to control transmission and reception of signals with each other and each operation. In addition, the control unit 24 includes a natural ice melting likelihood determination unit 24a, an outside air temperature storage unit 24b, and an operation result storage unit 24c. The outside air temperature storage unit 24b stores the outside air temperature detected by the outside air temperature sensor 2a. The natural deicing prospect determination unit 24a compares the change in the outside air temperature detected by the outside air temperature sensor 2a or the outside air temperature stored in the outside air temperature storage unit 24b with the detected value in the outside air temperature sensor 2a, thereby detecting the natural ice melting. (Details will be described later). In addition, the operation result storage unit 24c stores, as an operation result, whether or not a hot water storage hot water supply operation to the hot water storage tank 1 by the heat pump unit 2 has been performed since the hot water storage type hot water heater is installed. Here, the fact that the operation result is stored in the operation result storage means 24c means that the hot water storage type water heater is normally installed and connected to a water supply source, a faucet, a bathtub, etc., and the electrical work is completed, and the heat pump circulation pump 2 Means that there has been a normal operation even once, and means that general countermeasures against freezing have been taken.

リモコン２５は、リモコン表示部２５ａおよびスピーカ（図示せず）を有しており、リモコン表示部２５ａに各種ガイダンスを表示または、スピーカで同等内容を音声で報知することで、使用者に報知を行うことができる報知部にあたるものである。なお、本実施の形態では、報知部として給湯機のリモコンを例示したが、これに限らず例えば、ＨＥＭＳ等の外部と接続されたネットワークを経由して、スマートホンやタブレット等の画面やスピーカーを報知部として利用してもよい。   The remote control 25 has a remote control display unit 25a and a speaker (not shown), and displays various guidance on the remote control display unit 25a or notifies the user by notifying the equivalent content by voice. It is a notification part that can be used. In the present embodiment, the remote controller of the water heater is exemplified as the notification unit. However, the present invention is not limited to this. For example, a screen or speaker such as a smartphone or a tablet is connected via a network connected to the outside such as HEMS. You may use as an alerting | reporting part.

図２の（ａ）から（ｄ）は、本発明の実施の形態１の報知部であるリモコン２５の表示部２５ａに表示する各種ガイダンスの例（２５ｂ〜２５ｅ）である。   (A) to (d) of FIG. 2 are examples (25b to 25e) of various types of guidance displayed on the display unit 25a of the remote controller 25 that is the notification unit according to the first embodiment of the present invention.

制御部２４は、ヒートポンプ循環ポンプ４に電圧印加している状態で回転数が検出されない際に、設置初期（給湯機の運転動作履歴なし）で低外気温時（外気温が７℃以下）に、ヒートポンプ循環ポンプ４内残水の凍結によりポンプロックが発生したと判断し、後述するフローチャートでの判断に応じて、リモコン表示部２５ａに図２の（ｂ）から（ｄ）のいずれかの表示を行い使用者に報知する。（詳細は後述）   When the rotational speed is not detected in a state where a voltage is applied to the heat pump circulation pump 4, the control unit 24 is in the initial stage of installation (no operation history of the water heater) and at a low outside air temperature (the outside air temperature is 7 ° C. or less). 2, it is determined that a pump lock has occurred due to freezing of residual water in the heat pump circulation pump 4, and one of the displays from (b) to (d) of FIG. 2 is displayed on the remote control display unit 25 a according to the determination in the flowchart described later. To inform the user. (Details will be described later)

制御部２４は、ヒートポンプ循環ポンプ４に電圧印加している状態で回転数が検出されない際に、設置初期以外（給湯機の運転動作履歴あり）で低外気温時（外気温が７℃以下）に、ヒートポンプ循環ポンプ４が故障したと判断し、リモコン表示部２５ａに図２の（ａ）の表示を行い使用者に報知する。   When the rotational speed is not detected in a state where voltage is applied to the heat pump circulation pump 4, the control unit 24 is at a low outside temperature (outside temperature is 7 ° C. or less) except for the initial stage of installation (the operation history of the water heater is present). Then, it is determined that the heat pump circulation pump 4 has failed, and the remote control display unit 25a displays (a) in FIG. 2 to notify the user.

制御部２４は、ヒートポンプ循環ポンプ４に電圧印加している状態で回転数が検出されない際に、設置初期（給湯機の運転動作履歴なし）で高外気温時（外気温が７℃より高い）に、ヒートポンプ循環ポンプ４が故障したと判断し、リモコン表示部２５ａに図２の（ａ）の表示を行い使用者に報知する。   When the rotational speed is not detected in a state where voltage is applied to the heat pump circulation pump 4, the control unit 24 is at the initial installation stage (no operation history of the water heater) and at a high outside air temperature (the outside air temperature is higher than 7 ° C.). Then, it is determined that the heat pump circulation pump 4 has failed, and the remote control display unit 25a displays (a) in FIG. 2 to notify the user.

制御部２４は、ヒートポンプ循環ポンプ４に電圧印加している状態で回転数が検出されない際に、設置初期以外（給湯機の運転動作履歴あり）で高外気温時（外気温が７℃より高い）に、ヒートポンプ循環ポンプが故障したと判断し、リモコン表示部２５ａに図２の（ａ）の表示を行い使用者に報知する。   When the rotational speed is not detected in a state where voltage is applied to the heat pump circulation pump 4, the control unit 24 is at a high outside temperature (the outside temperature is higher than 7 ° C.) except at the initial stage of installation (the operation history of the water heater is present). 2), it is determined that the heat pump circulation pump has failed, and the remote control display unit 25a displays (a) in FIG. 2 to notify the user.

自然解氷見込み判定手段２４ａは、外気温センサ２ａで検出した外気温度の変化、または外気温度記憶手段２４ｂで記憶した外気温度と外気温度センサ２ａでの検出値を比較することで、自然解氷の見込みがあるかを判断し、自然解氷見込み有りと判定した場合は、リモコン表示部２５ａに図２の（ｃ）の表示を行い使用者に報知する。また、自然解氷見込み無しと判定した場合は、リモコン表示部２５ａに図２の（ｄ）の表示を行い使用者に報知する。   The natural deicing prospect determination unit 24a compares the change in the outside air temperature detected by the outside air temperature sensor 2a or the outside air temperature stored in the outside air temperature storage unit 24b with the detected value in the outside air temperature sensor 2a, thereby detecting the natural ice melting. 2 is displayed, and when it is determined that natural ice melting is possible, the remote control display unit 25a displays (c) in FIG. 2 to notify the user. When it is determined that natural ice melting is not expected, the display shown in FIG. 2D is displayed on the remote control display unit 25a to notify the user.

次に、上記実施の形態１の具体的制御動作を図３に基づいて説明する。図３は本発明の実施の形態１を示す貯湯式給湯機の制御動作のフローチャートである。   Next, a specific control operation of the first embodiment will be described with reference to FIG. FIG. 3 is a flowchart of the control operation of the hot water storage type hot water heater showing Embodiment 1 of the present invention.

図３において、制御部２４は、ステップＳ１でヒートポンプ循環ポンプ４を動作させるために電圧を印加する。続いてステップＳ２で、電圧印加のあとヒートポンプ循環ポンプが正常に動作すればＹＥＳ方向に進み本フローは終了する。一方、ヒートポンプ循環ポンプ４から回転数のフィードバックが得られない場合（すなわち動作しない場合）は、ＮＯ方向に進みステップＳ３に至る。ステップＳ３では、動作実績記憶手段２４ｃの記憶内容を確認し、動作実績ありの場合はＹＥＳ方向でステップＳ５へ、設置初期（給湯機の運転動作履歴なし）の場合は、ＮＯ方向でステップＳ４に進む。ステップＳ４では、外気温センサ２ａの検出値が高外気温時（外気温が７℃より高い）の場合はステップＳ５に進み、それ以外の場合は、ステップＳ７に進む。ステップＳ５では、設置初期以外（給湯機の運転動作履歴あり）または、設置初期（給湯機の運転履歴なし）かつ高外気温時（外気温が７℃より高い）であれば、部品（ヒートポンプ循環ポンプ２）故障と判定し、ステップＳ６に進み、ポンプ故障ガイダンス２５ｂをリモコン表示部２５ａに表示させる。   In FIG. 3, the control unit 24 applies a voltage in order to operate the heat pump circulation pump 4 in step S1. Subsequently, in step S2, if the heat pump circulation pump operates normally after voltage application, the process proceeds in the YES direction and this flow ends. On the other hand, when the feedback of the rotation speed cannot be obtained from the heat pump circulation pump 4 (that is, when it does not operate), the process proceeds in the NO direction to reach step S3. In step S3, the stored contents of the operation record storage means 24c are confirmed. If there is an operation record, the process proceeds to step S5 in the YES direction. If the installation is in the initial stage (no operation history of the water heater), the process proceeds to step S4 in the NO direction. move on. In step S4, if the detected value of the outside air temperature sensor 2a is at a high outside air temperature (the outside air temperature is higher than 7 ° C.), the process proceeds to step S5. Otherwise, the process proceeds to step S7. In step S5, if it is other than the initial stage of installation (there is an operation history of the water heater), or at the initial stage of installation (no operation history of the water heater) and at a high outside air temperature (the outside air temperature is higher than 7 ° C.), the component (heat pump circulation) Pump 2) It is determined that there is a failure, and the process proceeds to step S6, where a pump failure guidance 25b is displayed on the remote control display unit 25a.

ステップＳ７では、設置初期（給湯機の運転履歴なし）かつ外気温が７℃以下であるので、部品（ヒートポンプ循環ポンプ２）故障ではなく凍結起因のポンプロックと判断し、凍結によるポンプロックエラー（ポンプ凍結エラー）と判定しステップＳ８に進む。   In step S7, since the initial installation (no operation history of the water heater) and the outside air temperature is 7 ° C. or less, it is determined that the pump lock is caused by freezing rather than a component (heat pump circulation pump 2) failure. It is determined that (pump freezing error) and the process proceeds to step S8.

ステップＳ８では、ポンプ凍結エラー発生時、外気温センサ２ａでの検出値を確認し、外気温が氷点下より高ければ（外気温が０℃より高い）ＹＥＳ方向に進みステップＳ９に至り、自然解氷の見込み有りと判断しステップＳ１０に進む。ステップＳ１０では、リモコン表示部２５ａに、解氷待機誘導ガイダンス２５ｄを表示し使用者に報知する。   In step S8, when a pump freezing error occurs, the detected value by the outside air temperature sensor 2a is confirmed. If the outside air temperature is higher than the freezing point (outside air temperature is higher than 0 ° C.), the process proceeds to the YES direction, and step S9 is reached. The process proceeds to step S10. In step S10, the ice-break standby guidance guidance 25d is displayed on the remote control display unit 25a to notify the user.

またステップＳ８で、ポンプ凍結エラー発生時、外気温センサ２ａでの検出値を確認し、外気温が氷点下以下（外気温が０℃以下）であればＮＯ方向に進みステップ１に至り、自然解氷の見込み無しと判断しステップＳ１２に進む。ステップＳ１２では、リモコン表示部２５ａに、解氷作業誘導ガイダンス２５ｅを表示し使用者に報知する。   In step S8, when a pump freezing error occurs, the value detected by the outside air temperature sensor 2a is confirmed. If the outside air temperature is below the freezing point (the outside air temperature is 0 ° C. or below), the process proceeds in the NO direction to reach step 1, and the natural solution It is determined that there is no prospect of ice, and the process proceeds to step S12. In step S12, the remote control display unit 25a displays the ice melting operation guidance 25e to notify the user.

以上のように本発明の実施の形態１によれば、これまで使用者に販売店等への連絡と対応完了までの待機を余儀なくさせることでの復旧期間の長大化に対して、自然解氷可能なケースを抽出し、使用者による解氷確認を促すことで、復旧期間の短縮機会を増加させることが可能になる。   As described above, according to the first embodiment of the present invention, natural ice-breaking can be prevented against the lengthening of the recovery period by forcing the user to contact the dealer and wait until the response is completed. By extracting possible cases and encouraging the user to check for deicing, it is possible to increase opportunities for shortening the recovery period.

実施の形態２．
次に本発明の実施の形態２について、図４を用いて説明する。なお構成については、本発明の実施の形態１と同等であるため、図１、図２を参照することとし詳細な説明を省略する。また、同等の動作内容に関しても説明を省略する。 Embodiment 2. FIG.
Next, Embodiment 2 of the present invention will be described with reference to FIG. Since the configuration is the same as that of the first embodiment of the present invention, detailed description thereof will be omitted with reference to FIGS. Also, the description of equivalent operation contents is omitted.

実施の形態２では、ポンプ凍結エラー発生中（図３のステップＳ７）の部分について、別の動作を規定しているので、これについて説明する。   In the second embodiment, another operation is defined for the portion where the pump freezing error is occurring (step S7 in FIG. 3), and this will be described.

実施の形態２においては、ポンプ凍結エラー発生中は外気温に対する二つの閾値Ａ・Ｂ（Ａ＞Ｂ）を設け、二つの閾値をもって三つの温度領域を規定する。この各温度領域にて、それぞれ自然解氷見込み判定を実施し、自然解氷見込みの状態を更新する。   In the second embodiment, during the occurrence of the pump freezing error, two threshold values A and B (A> B) with respect to the outside air temperature are provided, and three temperature regions are defined with the two threshold values. In each of these temperature regions, natural ice melting prospect determination is performed, and the state of natural ice melting prospect is updated.

外気温に対する閾値Ａは、例えば東京の冬期（1月〜3月）の平均外気温をもとに７℃とする。外気温に対する閾値Ｂは、例えば氷点（０℃）に対して、センサのバラツキ等により検出できない場合を考慮し、少しマージンを設けた１℃とする。   The threshold value A with respect to the outside temperature is set to 7 ° C. based on the average outside temperature in the winter season (January to March) of Tokyo, for example. The threshold value B for the outside air temperature is set to 1 ° C. with a little margin in consideration of the case where the freezing point (0 ° C.) cannot be detected due to sensor variation or the like.

次に、上記実施の形態２の動作の詳細について図４により説明する。図４は本発明の実施の形態２を示す貯湯式給湯機の制御動作のフローチャートである。   Next, details of the operation of the second embodiment will be described with reference to FIG. FIG. 4 is a flowchart of the control operation of the hot-water storage type hot water heater showing Embodiment 2 of the present invention.

図４において、制御部２４は、ステップＳ１３で、ポンプ凍結エラー発生中かどうかを判断（実施の形態１参照）し、発生中以外の場合はＹＥＳ方向に進み本フローを終了する。一方、ポンプ凍結エラー発生中の場合はＮＯ方向に進みステップＳ１４に至る。ステップＳ１４では、外気温が閾値Ａ以上（外気温≧７℃）の場合、ステップＳ１５に進み、その温度領域を解氷見込み有り領域とし、自然解氷見込みを“有り”に更新する。続いてステップＳ１６に進み、解氷待機誘導ガイダンス２５ｄをリモコン表示部２５ａに表示させる。一方、外気温が閾値Ａ未満（外気温＜７℃）の場合、ステップＳ１７に進む。   4, in step S13, the control unit 24 determines whether or not a pump freezing error is occurring (see Embodiment 1). If not, the control unit 24 proceeds in the YES direction and ends this flow. On the other hand, if a pump freezing error has occurred, the process proceeds in the NO direction to reach step S14. In step S14, when the outside air temperature is equal to or higher than the threshold value A (outside air temperature ≧ 7 ° C.), the process proceeds to step S15, where the temperature region is set as a region where ice is expected to be melted, and the natural ice melting probability is updated to “present”. Subsequently, the process proceeds to step S16, and the ice melting standby guidance 25d is displayed on the remote control display unit 25a. On the other hand, if the outside air temperature is less than the threshold A (outside air temperature <7 ° C.), the process proceeds to step S17.

ステップＳ１７では、外気温が所定の閾値Ｂを超える場合、すなわち１℃＜外気温＜７℃の場合、その温度領域を解氷予測領域とし、外気温の変化率をもとに自然解氷見込みの更新を行う。ここでは、外気温度が１℃＜外気温＜７℃の場合、ＹＥＳ方向に進みステップＳ１８に至り、それ以外の場合はＮＯ方向に進みステップＳ２５に至る。   In step S17, when the outside air temperature exceeds a predetermined threshold B, that is, when 1 ° C. <outside air temperature <7 ° C., the temperature region is set as a de-icing prediction region, and natural de-icing is expected based on the rate of change of the outside temperature. Update. Here, if the outside air temperature is 1 ° C. <outside air temperature <7 ° C., the process proceeds in the YES direction to step S18, and otherwise, the process proceeds in the NO direction to reach step S25.

ステップＳ１８では、外気温記憶手段２４ｂは、所定時間毎（例えば１時間毎に）の外気温データを今回外気温として記憶する。その際に、もともと今回外気温として記憶していた外気温データは前回外気温として記憶する。そして、外気温記憶手段２４ｂにて記憶している、今回外気温と前回外気温を基に、以下の式１にて外気温変化率ΔＴを算出し、ステップＳ１９に進む。
ΔＴ ＝ 今回外気温 − 前回外気温 … （式１） In step S18, the outside air temperature storage unit 24b stores the outside air temperature data every predetermined time (for example, every hour) as the current outside air temperature. At that time, the outside temperature data originally stored as the outside temperature this time is stored as the previous outside temperature. Then, based on the current outside air temperature and the previous outside air temperature stored in the outside air temperature storage unit 24b, the outside air temperature change rate ΔT is calculated by the following equation 1, and the process proceeds to step S19.
ΔT = current outside temperature-last outside temperature ... (Formula 1)

ステップＳ１９では、式１で演算したΔＴと所定値α（例えばα＝１℃）を比較し、ΔＴが所定値α以上（つまり温度変化がプラス方向で上昇傾向であることを意味する）の場合ＹＥＳ方向に進み、ステップＳ２０に至る。ステップＳ２０では、今後の外気温上昇により自然解氷を見込むことが出来ると判断し、自然解氷見込みを“有り”に更新してステップＳ２１に進む。ステップＳ２１では、解氷待機誘導ガイダンス２５ｄをリモコン表示部２５ａに表示させる。一方、ステップＳ１９で、ΔＴが、所定値α未満の場合はＮＯ方向に進み、ステップＳ２２に至る。   In step S19, ΔT calculated by Expression 1 is compared with a predetermined value α (for example, α = 1 ° C.), and ΔT is equal to or larger than the predetermined value α (that means that the temperature change tends to increase in the positive direction). Proceeding to the YES direction, it reaches step S20. In step S20, it is determined that natural ice melting can be expected due to a future rise in outside air temperature, the natural ice melting expectation is updated to “present”, and the process proceeds to step S21. In step S21, the ice melting standby guidance 25d is displayed on the remote control display unit 25a. On the other hand, if ΔT is less than the predetermined value α in step S19, the process proceeds in the NO direction to reach step S22.

ステップＳ２２では、ΔＴが所定値αのマイナス側（マイナスα）より高く、所定値α未満（−α＜ΔＴ＜α）の場合、現時点の外気温に急激な増減は無いと判断しＹＥＳ方向に進み、現在の自然解氷見込みを継続させる。一方、ΔＴが所定値αのマイナス側（マイナスα）以下の場合は、ステップＳ２３に進む。   In step S22, if ΔT is higher than the negative side (−α) of the predetermined value α and lower than the predetermined value α (−α <ΔT <α), it is determined that there is no sudden increase / decrease in the current outside air temperature and the YES direction is reached. Proceed and continue the current natural ice melting prospects. On the other hand, if ΔT is equal to or less than the minus side (minus α) of the predetermined value α, the process proceeds to step S23.

ステップＳ２３では、ΔＴが所定値αのマイナス側（マイナスα）以下（ΔＴ≦−α）であるので、今後の外気温下降により自然解氷を見込むことが出来ないと判断し、自然解氷見込みを“無し”に更新しステップＳ２４に進む。ステップＳ２４では、解氷作業誘導ガイダンス２５ｄをリモコン表示部２５ａに表示させる。   In step S23, since ΔT is equal to or smaller than the negative side (minus α) of the predetermined value α (ΔT ≦ −α), it is determined that natural ice melting cannot be expected due to a future decrease in outside air temperature, and natural ice melting is expected. Is updated to “None”, and the process proceeds to Step S24. In step S24, the ice melting operation guidance 25d is displayed on the remote control display unit 25a.

なお、本実施の形態２では、外気温変化率の所定値αを１℃としたが、αは例えば東京のある一日の外気温推移などをもとに決定しても良い。例えば、一日の最低外気温が、一日のうち上述の閾値Ａ以上（自然解氷見込み有り）となる時間で閾値Ａ以上になるような外気温上昇率を想定し、例えば０．３℃ほどとするようにしてもよい。またαは固定値ではなく、過去の外気温度等や過去に利用した値などをもとに算出する変数としても良い。   In the second embodiment, the predetermined value α of the outside air temperature change rate is set to 1 ° C., but α may be determined based on, for example, the outside air temperature transition of one day in Tokyo. For example, assuming an outside air temperature increase rate such that the minimum daily outside air temperature is equal to or higher than the threshold value A during the time when the daily minimum outdoor temperature is equal to or higher than the above-described threshold value A (there is a possibility of natural melting), for example, 0.3 ° C. You may make it so that. Further, α is not a fixed value, but may be a variable calculated based on the past outside air temperature or the like or a value used in the past.

なお、ステップＳ２５では、自然解氷見込み判定手段２４ａは、外気温が閾値Ｂ以下（外気温≦１℃）であるので、その温度領域を解氷見込み無し領域とし、自然解氷見込みを“無し”に更新しステップＳ２６に進む。ステップＳ２６では、解氷作業誘導ガイダンス２５ｄをリモコン表示部２５ａに表示させる。   In step S25, since the outside air temperature is equal to or lower than the threshold value B (outside air temperature ≦ 1 ° C.), the natural ice melting prospect determining unit 24a sets the temperature region as a region where there is no ice melting prospect, The process proceeds to step S26. In step S26, the ice melting operation guidance 25d is displayed on the remote control display unit 25a.

以上のように、本発明の実施の形態２によれば、ポンプ凍結エラー発生時のピンポイントの外気温度の状況によらず、使用者がエラーを認識した時点や、刻々と変化する外気温度の状況に応じた最適な行動（販売店等へ連絡、もしくは解氷待機並びに解氷確認）へ誘導することが可能となり、より使い勝手が向上する。   As described above, according to the second embodiment of the present invention, regardless of the pinpoint outside air temperature when the pump freezing error occurs, the time when the user recognizes the error or the outside air temperature that changes every moment. It is possible to guide the user to the optimum action (contact with a store or the like, standby for deicing and confirmation of deicing) according to the situation, and usability is further improved.

１ 貯湯タンク、 ２ ヒートポンプユニット、 ２ａ 外気温センサ、
３ 加熱循環回路、 ４ ヒートポンプ循環ポンプ、 ５ａ 第１の温度センサ、
５ｂ 第２の温度センサ、 ５ｃ 第３の温度センサ、 ５ｄ 第４の温度センサ、
５ｅ 第５の温度センサ、 ６ 貯湯タンク温度センサ、
７ 一般給湯側電動混合弁、 ８ 給湯管、 ９ 給水管、 １０ 混合給湯管、
１１ 風呂給湯側電動混合弁、１２ 風呂側循環回路、 １３ 電磁弁、
１４ 風呂循環ポンプ、 １５ 熱交換器、１６ タンク側循環回路、
１７ タンク循環ポンプ、１８ 混合風呂管、１９ 給湯量流量センサ、
２０ 給湯量温度センサ、２１ 風呂用流量センサ、
２２ 風呂用温度センサ、２３ 給水温度センサ、２４ 制御部
２４ａ 自然解氷見込み判定手段、２４ｂ 外気温記憶手段
２４ｃ 動作実績記憶手段、 ２５ リモコン、 ２５ａ リモコン表示部
２５ｂ ポンプ故障ガイダンス、 ２５ｃ ポンプ凍結ガイダンス
２５ｄ 解氷待機誘導ガイダンス、 ２５ｅ 解氷作業誘導ガイダンス 1 hot water storage tank, 2 heat pump unit, 2a outside air temperature sensor,
3 Heating circulation circuit, 4 Heat pump circulation pump, 5a First temperature sensor,
5b second temperature sensor, 5c third temperature sensor, 5d fourth temperature sensor,
5e 5th temperature sensor, 6 hot water storage tank temperature sensor,
7 General hot water supply side electric mixing valve, 8 Hot water supply pipe, 9 Water supply pipe, 10 Mixed hot water supply pipe,
11 Bath hot water supply side electric mixing valve, 12 Bath side circulation circuit, 13 Solenoid valve,
14 bath circulation pump, 15 heat exchanger, 16 tank side circulation circuit,
17 Tank circulation pump, 18 Mixed bath pipe, 19 Hot water flow rate sensor,
20 Hot water supply temperature sensor, 21 Bath flow sensor,
22 temperature sensor for bath, 23 water supply temperature sensor, 24 control unit 24a natural deicing possibility determination unit, 24b outside air temperature storage unit 24c operation result storage unit, 25 remote control, 25a remote control display unit 25b pump failure guidance, 25c pump freezing guidance 25d De-icing standby guidance, 25e De-icing work guidance

Claims (8)

熱媒を加熱する加熱手段と、
外気温度を検出する外気温検出手段と、
前記加熱手段に接続され、前記熱媒が循環する循環回路と、
前記循環回路に設けられ、前記循環回路に前記熱媒を循環させる循環ポンプと、
前記循環ポンプと前記加熱手段を制御する制御部と、
前記制御部に電気的に接続され、動作状態を使用者に報知可能な報知部と、を備え、
前記制御部は、前記循環ポンプに駆動指示を与えても前記循環ポンプが駆動しない場合に、
前記外気温検出手段で検出した外気温が、所定の閾値以上であれば、自然解氷見込み有を主旨とする第一ガイダンスを前記報知部で報知し、
前記外気温検出手段で検出した外気温が、前記所定の閾値未満であれば、自然解氷見込み無を主旨とする第二ガイダンスを前記報知部で報知すること、
を特徴とする給湯機。 Heating means for heating the heat medium;
An outside air temperature detecting means for detecting the outside air temperature;
A circulation circuit connected to the heating means and circulating the heating medium;
A circulation pump provided in the circulation circuit and circulating the heat medium in the circulation circuit;
A controller for controlling the circulation pump and the heating means;
A notification unit electrically connected to the control unit and capable of notifying a user of an operation state;
When the control unit does not drive the circulation pump even if a drive instruction is given to the circulation pump,
If the outside air temperature detected by the outside air temperature detecting means is equal to or higher than a predetermined threshold, the informing unit informs the first guidance mainly about the possibility of natural ice melting,
If the outside air temperature detected by the outside air temperature detecting means is less than the predetermined threshold value, a second guidance mainly indicating that natural ice melting is not expected is informed by the informing unit,
A water heater characterized by. 前記制御部は、前記所定の閾値を、所定の第一温度と、前記第一温度よりも低い所定の第二温度とし、
前記外気温検出手段で検出した外気温が、前記第一温度以上であれば、前記第一ガイダンスを前記報知部で報知し、
前記外気温検出手段で検出した外気温が、前記第二温度以下であれば、前記第二ガイダンスを前記報知部で報知すること、
を特徴とする、請求項１に記載の給湯機。 The control unit sets the predetermined threshold as a predetermined first temperature and a predetermined second temperature lower than the first temperature,
If the outside air temperature detected by the outside air temperature detecting means is equal to or higher than the first temperature, the informing unit notifies the first guidance,
If the outside air temperature detected by the outside air temperature detecting means is equal to or lower than the second temperature, informing the second guidance by the informing unit;
The water heater according to claim 1, wherein 前記給湯機の運転履歴を記憶する履歴記憶手段を備え、
前記制御部は、前記履歴記憶手段の前記運転履歴がない場合のみ、前記報知部で、前記第一ガイダンスまたは前記第二ガイダンスの報知を行う、
請求項１または２に記載の給湯機。 A history storage means for storing an operation history of the water heater;
The control unit performs the notification of the first guidance or the second guidance in the notification unit only when there is no operation history of the history storage unit.
The water heater according to claim 1 or 2. 前記制御部は、前記循環ポンプの駆動指示を定期的に行い、前記循環ポンプの駆動が確認できない間は、前記外気温検出手段で検出した外気温度に応じて、前記報知部での報知内容を更新する、請求項１から３のいずれか１つに記載の給湯機。   The control unit periodically gives an instruction to drive the circulation pump. While the drive of the circulation pump cannot be confirmed, according to the outside air temperature detected by the outside air temperature detection means, the notification content in the notification unit is displayed. The water heater according to any one of claims 1 to 3, which is updated. 前記制御部は、
前記外気温検出手段で検出した外気温度が、前記所定の閾値以上、
かつ給湯機の運転履歴がある状態で、
前記循環ポンプに駆動指示を行っても、前記循環ポンプの駆動が確認できない場合は、
前記循環ポンプが故障している旨を、前記報知部で報知する、
請求項１から４のいずれか１つに記載の給湯機。 The controller is
The outside air temperature detected by the outside air temperature detecting means is not less than the predetermined threshold,
And in the state where there is an operation history of the water heater,
If the drive of the circulation pump cannot be confirmed even if a drive instruction is given to the circulation pump,
Notifying the notification unit that the circulation pump has failed,
The water heater according to any one of claims 1 to 4. 前記制御部は、
前記外気温検出手段で検出した外気温度が、前記所定の閾値以上、
かつ給湯機の運転履歴がない状態で、
前記循環ポンプに駆動指示を行っても、前記循環ポンプの駆動が確認できない場合は、
前記循環ポンプが故障している旨を、前記報知部で報知する、
請求項１から５のいずれか１つに記載の給湯機。 The controller is
The outside air temperature detected by the outside air temperature detecting means is not less than the predetermined threshold,
And there is no operation history of the water heater,
If the drive of the circulation pump cannot be confirmed even if a drive instruction is given to the circulation pump,
Notifying the notification unit that the circulation pump has failed,
The water heater according to any one of claims 1 to 5. 前記制御部は、
前記外気温検出手段で検出した外気温度が、前記所定の閾値未満、
かつ給湯機の運転履歴がある状態で、
前記循環ポンプに駆動指示を行っても、前記循環ポンプの駆動が確認できない場合は、
前記循環ポンプが故障している旨を、前記報知部で報知する、
請求項１から６のいずれか１つに記載の給湯機。 The controller is
The outside air temperature detected by the outside air temperature detecting means is less than the predetermined threshold value,
And in the state where there is an operation history of the water heater,
If the drive of the circulation pump cannot be confirmed even if a drive instruction is given to the circulation pump,
Notifying the notification unit that the circulation pump has failed,
The water heater according to any one of claims 1 to 6. 前記制御部は、
前記外気温検出手段で検出した外気温度が、
前記所定の第一温度を超え、前記所定の第二温度未満である場合、
検出している外気温度の所定時間あたりの変化量が上昇傾向であれば、前記第一ガイダンスを前記報知部で報知し、
検出している外気温度の所定時間あたりの変化量が下降傾向であれば、前記第二ガイダンスを前記報知部で報知すること、
を特徴とする、請求項２から７のいずれか１つに記載の給湯機。 The controller is
The outside temperature detected by the outside temperature detecting means is
If the predetermined first temperature is exceeded and less than the predetermined second temperature,
If the amount of change in the detected outside air temperature per predetermined time is in an upward trend, the notification unit notifies the first guidance,
If the amount of change in the detected outside air temperature per predetermined time is in a downward trend, notifying the second guidance by the notification unit;
The water heater according to any one of claims 2 to 7, characterized in that:
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