JP2020159604A - Control method of storage-type hot water supply device - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
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Abstract
Description
本発明は、貯湯給湯装置の制御方法に関し、特に給湯以外の温水利用のために加熱した温水を供給する機能を有する貯湯給湯装置の制御方法に関する。 The present invention relates to a method for controlling a hot water storage device, and more particularly to a method for controlling a hot water storage device having a function of supplying hot water heated for using hot water other than hot water supply.
従来から、熱源機で貯湯槽の湯水を加熱して貯湯する貯湯運転によって貯湯した貯湯槽の湯水を給湯に使用する貯湯給湯装置が広く利用されている。このような貯湯給湯装置は、給湯に使用できる温度の湯水が貯湯槽に無い場合に貯湯槽の湯水や上水を加熱する加熱運転のための補助熱源機とポンプを備え、加熱運転により加熱した湯水を給湯に使用することができる。 Conventionally, a hot water storage device that uses hot water in a hot water storage tank for hot water supply by heating hot water in a hot water storage tank with a heat source machine and storing hot water has been widely used. Such a hot water storage hot water supply device is provided with an auxiliary heat source machine and a pump for a heating operation for heating hot water and clean water in the hot water tank when hot water at a temperature that can be used for hot water supply is not available in the hot water tank, and is heated by the heating operation. Hot water can be used for hot water supply.
また、貯湯給湯装置は、混合弁や混合装置等の混合手段を備え、混合手段で混合する高温水（貯湯運転で貯湯した湯水又は加熱運転で加熱した湯水）と低温水（上水）の混合比を調整して給湯設定温度に調整した湯水を給湯配管に供給する給湯運転を行う。給湯配管に接続された給湯栓等が開栓されると給湯運転が開始され、給湯栓等が閉止されると給湯運転が停止されて次回の給湯運転開始まで給湯待機状態になる。 In addition, the hot water storage and hot water supply device is provided with mixing means such as a mixing valve and a mixing device, and mixes high-temperature water (hot water stored in hot water storage operation or hot water heated in heating operation) and low-temperature water (clean water) to be mixed by the mixing means. A hot water supply operation is performed in which hot water water adjusted to the hot water supply set temperature by adjusting the ratio is supplied to the hot water supply pipe. When the hot water supply tap or the like connected to the hot water supply pipe is opened, the hot water supply operation is started, and when the hot water supply tap or the like is closed, the hot water supply operation is stopped and the hot water supply standby state is established until the next hot water supply operation is started.
給湯待機状態の貯湯給湯装置は、給湯運転停止後に所定の待機時間が経過するまで、混合手段の高温水入口の湯水温度等に応じて混合手段の混合比を調整している。時間経過と共に低下する高温水入口の配管内の湯水温度に合わせて混合比を調整しているので、次回の給湯運転開始時に早く給湯設定温度の湯水を給湯することができる。しかし、給湯待機中に高温の湯水が貯湯されると、次回の給湯運転開始時に、配管内の温度が低下した湯水が給湯されてから新たに貯湯された高温の湯水が混合手段に供給されるので、混合比の調整が間に合わずに給湯設定温度よりも高温の湯水が給湯されてしまう問題があった。 The hot water storage hot water supply device in the hot water supply standby state adjusts the mixing ratio of the mixing means according to the hot water temperature of the high temperature water inlet of the mixing means until a predetermined standby time elapses after the hot water supply operation is stopped. Since the mixing ratio is adjusted according to the temperature of the hot water in the pipe at the high temperature water inlet, which decreases with the passage of time, it is possible to quickly supply hot water at the set temperature for hot water supply at the start of the next hot water supply operation. However, if hot water is stored while waiting for hot water supply, when the next hot water supply operation is started, the hot water whose temperature has dropped in the pipe is supplied and then the newly stored hot water is supplied to the mixing means. Therefore, there is a problem that hot water having a temperature higher than the set temperature for hot water supply is supplied because the mixing ratio cannot be adjusted in time.
このような問題に対して、例えば特許文献１の給湯システムは、給湯待機時に貯湯槽の湯水温度と給湯設定温度に基づいて又は貯湯槽に流入する湯水温度と給湯設定温度に基づいて、混合ユニットにおける調整弁の開度調整によって混合比を調整することにより、給湯が再開されたときに給湯設定温度よりも高温の給湯を防いでいる。 To solve such a problem, for example, the hot water supply system of Patent Document 1 is a mixing unit based on the hot water temperature and the hot water supply set temperature of the hot water storage tank or based on the hot water water temperature and the hot water supply set temperature flowing into the hot water storage tank during standby for hot water supply. By adjusting the mixing ratio by adjusting the opening degree of the adjusting valve in, hot water supply higher than the hot water supply set temperature is prevented when the hot water supply is restarted.
貯湯給湯装置には、上記の給湯機能だけでなく、補助熱源機を使用する加熱運転によって加熱した温水を暖房や風呂の追焚きに利用する給湯以外の温水利用機能を備えているものがある。特許文献１の給湯システムでは、温水利用機能で利用された温水と、給湯のために補助熱源機で加熱された温水は貯湯槽に流入し、この貯湯槽の温水温度に基づいて混合比を調整して給湯設定温度よりも高温の給湯を防いでいる。 Some hot water storage and hot water supply devices have not only the above-mentioned hot water supply function but also a hot water utilization function other than the hot water supply function in which hot water heated by a heating operation using an auxiliary heat source machine is used for heating or reheating a bath. In the hot water supply system of Patent Document 1, the hot water used in the hot water utilization function and the hot water heated by the auxiliary heat source machine for hot water supply flow into the hot water storage tank, and the mixing ratio is adjusted based on the hot water temperature of the hot water storage tank. This prevents hot water supply that is higher than the set temperature for hot water supply.
このような特許文献１の給湯システムは、補助熱源機で加熱された湯水が貯湯タンクの湯水と混合されてから混合ユニットに供給されるので、混合ユニットに供給される温水の温度が変動して早く給湯設定温度の給湯を行うことが困難になる。また、温水利用機能を利用する場合には、貯湯運転により貯湯槽内に形成された湯水の温度成層を温水利用機能で利用された温水によって崩すことになり、好ましくない。 In such a hot water supply system of Patent Document 1, since the hot water heated by the auxiliary heat source machine is mixed with the hot water in the hot water storage tank and then supplied to the mixing unit, the temperature of the hot water supplied to the mixing unit fluctuates. It becomes difficult to quickly supply hot water at the set temperature. Further, when the hot water utilization function is used, the temperature stratification of the hot water formed in the hot water storage tank by the hot water storage operation is destroyed by the hot water used in the hot water utilization function, which is not preferable.
それ故、補助熱源機で加熱した湯水を混合手段に直接供給すると共に、温水利用機能で利用する温水を貯湯槽に流入させることなく循環させるように配管類を配設する。しかし、給湯待機中の温水利用機能の利用時に給湯運転が開始されると、温水利用機能のための温水が混合手段に供給されてしまうことがあり、混合手段の高温水入口の湯水温度や貯湯槽の湯水温度に応じて混合比を調整していても給湯設定温度よりも高温の給湯がされる虞があった。 Therefore, the hot water heated by the auxiliary heat source machine is directly supplied to the mixing means, and the pipes are arranged so that the hot water used by the hot water utilization function is circulated without flowing into the hot water storage tank. However, if the hot water supply operation is started when the hot water utilization function is used while waiting for hot water supply, the hot water for the hot water utilization function may be supplied to the mixing means, and the hot water temperature at the high temperature water inlet of the mixing means or the hot water storage. Even if the mixing ratio was adjusted according to the temperature of the hot water in the tank, there was a risk that hot water would be supplied at a temperature higher than the set temperature for hot water supply.
本発明の目的は、給湯待機中の温水利用機能の利用時に給湯運転が開始された場合に、給湯設定温度よりも高温の給湯を防ぐことができる貯湯給湯装置の制御方法を提供することである。 An object of the present invention is to provide a control method for a hot water storage water heater that can prevent hot water supply at a temperature higher than the set hot water supply temperature when a hot water supply operation is started when the hot water utilization function during hot water supply standby is used. ..
請求項１の発明の貯湯給湯装置の制御方法は、湯水を貯湯する貯湯槽と、前記貯湯槽の湯水を循環させて加熱する熱源機と、前記貯湯槽の底部に接続された給水配管と、前記貯湯槽の頂部に接続された出湯配管と、前記給水配管の分岐配管と前記出湯配管と給湯配管が接続された混合手段と、前記出湯配管から分岐されてその分岐部よりも混合手段側で前記出湯配管に接続された補助加熱配管と、前記補助加熱配管に介装された補助熱源機と、前記補助熱源機の入口側で前記補助加熱配管に介装されたポンプと、前記補助熱源機の出口側で前記補助加熱配管から分岐されて前記ポンプの入口側で前記補助加熱配管に接続された温水利用配管を備えた貯湯給湯装置であって、前記出湯配管から供給される高温水と前記分岐配管から供給される低温水を混合する前記混合手段の混合比を調整して給湯設定温度に調整した湯水を前記給湯配管から給湯する給湯運転制御と、前記給湯運転制御が停止されてから予め設定された待機時間が経過するまでは前記混合手段の高温水入口の湯水温度に応じて前記混合手段の混合比を調整する給湯待機制御を実行する貯湯給湯装置の制御方法において、前記給湯待機制御では、所定条件下で前記混合手段の高温水入口よりも上流の湯水温度のうち最も高温の湯水温度に応じて前記混合手段の混合比を調整することを特徴としている。 The method for controlling the hot water storage device according to claim 1 is a hot water storage tank for storing hot water, a heat source machine for circulating and heating the hot water in the hot water storage tank, a water supply pipe connected to the bottom of the hot water storage tank, and the like. The hot water outlet pipe connected to the top of the hot water storage tank, the mixing means in which the branch pipe of the water supply pipe and the hot water outlet pipe and the hot water supply pipe are connected, and the mixing means branched from the hot water supply pipe and on the mixing means side of the branch portion. An auxiliary heating pipe connected to the hot water outlet pipe, an auxiliary heat source machine interposed in the auxiliary heating pipe, a pump interposed in the auxiliary heating pipe on the inlet side of the auxiliary heat source machine, and the auxiliary heat source machine. A hot water storage device provided with a hot water utilization pipe branched from the auxiliary heating pipe on the outlet side of the pump and connected to the auxiliary heating pipe on the inlet side of the pump, and the high temperature water supplied from the hot water outlet pipe and the above. The hot water supply operation control for supplying hot water from the hot water supply pipe by adjusting the mixing ratio of the mixing means for mixing the low temperature water supplied from the branch pipe to the hot water supply set temperature, and the hot water supply operation control in advance after the hot water supply operation control is stopped. In the control method of the hot water storage hot water supply device that executes the hot water supply standby control that adjusts the mixing ratio of the mixing means according to the hot water temperature of the high temperature water inlet of the mixing means until the set standby time elapses, the hot water supply standby control Is characterized in that, under predetermined conditions, the mixing ratio of the mixing means is adjusted according to the hot water temperature of the hot water upstream of the high temperature water inlet of the mixing means.
上記構成によれば、温水利用配管の湯水を利用する機能を有する貯湯給湯装置は、混合手段で湯水を給湯設定温度に調整して給湯する給湯運転制御を実行する。また、給湯運転制御停止後に待機時間が経過するまでは、給湯設定温度の給湯が可能なように混合手段の高温水入口の湯水温度に応じて混合比を調整する給湯待機制御を実行する。この給湯待機制御では、所定条件下で混合手段に供給される可能性がある湯水のうち最も高温の湯水温度に応じて混合比を調整する。従って、給湯待機中に給湯運転が開始されたときに、混合手段に最も高温の湯水が供給されても給湯設定温度の給湯が可能な状態に準備されているので、給湯設定温度よりも高温の給湯を防ぐことができる。 According to the above configuration, the hot water storage hot water supply device having a function of using hot water from the hot water utilization pipe executes hot water supply operation control in which hot water is adjusted to a hot water supply set temperature by a mixing means. Further, until the standby time elapses after the hot water supply operation control is stopped, the hot water supply standby control that adjusts the mixing ratio according to the hot water temperature at the high temperature water inlet of the mixing means is executed so that the hot water can be supplied at the hot water supply set temperature. In this hot water supply standby control, the mixing ratio is adjusted according to the hottest water temperature of the hot water that may be supplied to the mixing means under predetermined conditions. Therefore, when the hot water supply operation is started during the hot water supply standby, the hot water supply is prepared in a state where the hot water supply set temperature can be supplied even if the hot water supply is supplied to the mixing means, so that the temperature is higher than the hot water supply set temperature. Hot water supply can be prevented.
請求項２の発明の貯湯給湯装置の制御方法は、請求項１の発明において、前記所定条件は、前記温水利用配管に温水を供給するために前記補助熱源機を使用する加熱運転を実行している状態であることを特徴としている。 The control method of the hot water storage and hot water supply device according to the second aspect of the present invention is the invention of the first aspect, wherein the predetermined condition is to execute a heating operation using the auxiliary heat source machine to supply hot water to the hot water utilization pipe. It is characterized by being in a state of being.
上記構成によれば、温水利用配管に温水を供給するための補助熱源機を使用する加熱運転が実行中であることを所定条件として、この所定条件下で混合手段に供給される可能性がある湯水のうち最も高温の湯水温度に応じて混合比を調整する。従って、給湯待機中に給湯運転が開始されたときに、温水利用のために混合手段に最も高温の湯水が供給されても給湯設定温度の給湯が可能な状態に準備されているので、給湯設定温度よりも高温の給湯を防ぐことができる。 According to the above configuration, the mixture may be supplied to the mixing means under the predetermined conditions, provided that the heating operation using the auxiliary heat source machine for supplying the hot water to the hot water utilization pipe is being executed. The mixing ratio is adjusted according to the hottest water temperature of the hot water. Therefore, when the hot water supply operation is started during the hot water supply standby, the hot water supply setting is prepared so that the hot water supply can be supplied at the hot water supply set temperature even if the hot water supply is supplied to the mixing means for hot water use. It is possible to prevent hot water supply that is hotter than the temperature.
本発明の貯湯給湯装置の制御方法によれば、給湯待機中の温水利用機能の利用時に給湯運転が開始されても、給湯設定温度よりも高温の給湯を防ぐことができる。 According to the control method of the hot water storage hot water supply device of the present invention, even if the hot water supply operation is started when the hot water utilization function during the hot water supply standby is used, it is possible to prevent the hot water supply at a temperature higher than the hot water supply set temperature.
以下、本発明を実施するための形態について実施例に基づいて説明する。 Hereinafter, embodiments for carrying out the present invention will be described based on examples.
図１に示すように貯湯給湯装置１は、湯水を貯湯するための貯湯槽２と、この貯湯槽２の湯水を循環させて加熱するための熱源機３と、温度を調整して給湯するための混合弁４（混合手段）を備え、貯湯槽２から熱源機３に湯水を供給する熱源機往き配管５と熱源機３から貯湯槽２に湯水を戻す熱源機戻り配管６を有する。熱源機往き配管５には熱源機３に導入される湯水の温度を検知する熱源機往き温度センサ５ａが配設され、熱源機戻り配管６には熱源機３で加熱された湯水の温度を検知する熱源機戻り温度センサ６ａが配設されている。熱源機３は、例えばヒートポンプ式熱源機や燃料電池等の発電時の熱を利用する熱源機であり、貯湯槽２の湯水を給湯設定温度よりも高温に加熱して貯湯する貯湯運転を行う。 As shown in FIG. 1, the hot water storage and hot water supply device 1 includes a hot water storage tank 2 for storing hot water, a heat source machine 3 for circulating and heating the hot water in the hot water storage tank 2, and for adjusting the temperature to supply hot water. It is provided with a mixing valve 4 (mixing means) of the above, and has a heat source machine forward pipe 5 for supplying hot water from the hot water storage tank 2 to the heat source machine 3, and a heat source machine return pipe 6 for returning hot water from the heat source machine 3 to the hot water storage tank 2. A heat source machine forward temperature sensor 5a for detecting the temperature of hot water introduced into the heat source machine 3 is arranged in the heat source machine forward pipe 5, and the heat source machine return pipe 6 detects the temperature of the hot water heated by the heat source machine 3. A heat source machine return temperature sensor 6a is provided. The heat source machine 3 is, for example, a heat source machine that utilizes heat generated during power generation of a heat pump type heat source machine, a fuel cell, or the like, and performs a hot water storage operation in which hot water in the hot water storage tank 2 is heated to a temperature higher than a set temperature for hot water supply and stored.
また、貯湯給湯装置１は、貯湯槽２に上水（低温水）を供給するために貯湯槽２の底部に接続された給水配管７と、貯湯槽２の湯水を出湯するために貯湯槽２の頂部に接続された出湯配管８を備えている。給水配管７には低温水の温度を検知する給水温度センサ７ａが配設されている。貯湯槽２にはその高さ方向に所定の間隔を空けて配設された複数の貯湯温度センサ２ａ〜２ｅが配設されている。 Further, the hot water storage device 1 has a water supply pipe 7 connected to the bottom of the hot water storage tank 2 for supplying clean water (low temperature water) to the hot water storage tank 2, and a hot water storage tank 2 for discharging hot water from the hot water storage tank 2. It is provided with a hot water supply pipe 8 connected to the top of the water heater. A water supply temperature sensor 7a for detecting the temperature of low-temperature water is provided in the water supply pipe 7. The hot water storage tank 2 is provided with a plurality of hot water storage temperature sensors 2a to 2e arranged at predetermined intervals in the height direction thereof.
混合弁４には、給水配管７から分岐された第１分岐配管９（分岐配管）と出湯配管８と給湯配管１０が接続されている。給湯設定温度の給湯を行う給湯運転では、出湯配管８から供給される湯水（高温水）と第１分岐配管９から供給される低温水を混合して給湯設定温度に調整するために、混合弁４の混合比を調整する。混合弁４で混合された湯水は、給湯配管１０に供給されて給湯栓１１等から給湯される。混合弁４の高温水入口近傍の出湯配管８には、混合弁４に供給される高温水の温度を検知する混合弁高温水入口温度センサ８ａが配設されている。給湯配管１０には、給湯流量を検知する給湯流量センサ１０ａと、給湯温度を検知する給湯温度センサ１０ｂと、給湯流量を調整する給湯流量調整弁１０ｃ等が配設されている。 The first branch pipe 9 (branch pipe) branched from the water supply pipe 7, the hot water outlet pipe 8, and the hot water supply pipe 10 are connected to the mixing valve 4. In the hot water supply operation in which hot water is supplied at the hot water supply set temperature, a mixing valve is used to mix the hot water (high temperature water) supplied from the hot water outlet pipe 8 and the low temperature water supplied from the first branch pipe 9 to adjust to the hot water supply set temperature. Adjust the mixing ratio of 4. The hot water mixed by the mixing valve 4 is supplied to the hot water supply pipe 10 and is supplied from the hot water supply plug 11 and the like. A mixing valve high temperature water inlet temperature sensor 8a for detecting the temperature of the high temperature water supplied to the mixing valve 4 is provided in the hot water outlet pipe 8 near the high temperature water inlet of the mixing valve 4. The hot water supply pipe 10 is provided with a hot water supply flow rate sensor 10a for detecting the hot water supply flow rate, a hot water supply temperature sensor 10b for detecting the hot water supply temperature, a hot water supply flow rate adjusting valve 10c for adjusting the hot water supply flow rate, and the like.
出湯配管８から補助加熱配管１２が分岐され、その分岐部よりも混合弁４側で補助加熱配管１２が出湯配管８に接続されている。補助加熱配管１２には、湯水を加熱するための補助熱源機１４が介装されている。補助熱源機１４の湯水の入口側の補助加熱配管１２には、湯水を補助熱源機１４に供給するためのポンプ１５が介装されている。また、補助熱源機１４の湯水の出口側の補助加熱配管１２には、補助熱源機１４で加熱された湯水温度を検知する補助熱源機出口温度センサ１２ａが配設され、出湯配管８に供給する湯水量を調整するための流量調整弁１６が介装されている。流量調整弁１６には、流通する湯水温度を検知する流量調整弁温度センサ１６ａが配設されている。 The auxiliary heating pipe 12 is branched from the hot water outlet pipe 8, and the auxiliary heating pipe 12 is connected to the hot water outlet pipe 8 on the mixing valve 4 side of the branch portion. An auxiliary heat source machine 14 for heating hot water is interposed in the auxiliary heating pipe 12. A pump 15 for supplying hot water to the auxiliary heat source machine 14 is interposed in the auxiliary heating pipe 12 on the inlet side of the hot water of the auxiliary heat source machine 14. Further, the auxiliary heating pipe 12 on the hot water outlet side of the auxiliary heat source machine 14 is provided with an auxiliary heat source machine outlet temperature sensor 12a for detecting the temperature of the hot water heated by the auxiliary heat source machine 14, and supplies the hot water to the hot water outlet pipe 8. A flow rate adjusting valve 16 for adjusting the amount of hot water is provided. The flow rate adjusting valve 16 is provided with a flow rate adjusting valve temperature sensor 16a that detects the temperature of the flowing hot water.
補助熱源機１４の湯水の出口側であって流量調整弁１６よりも上流側の補助加熱配管１２から温水利用配管１８が分岐され、この温水利用配管１８がポンプ１５の入口側で補助加熱配管１２に接続されている。この接続部には補助熱源機１４に湯水を供給する２つの経路（補助加熱配管１２、温水利用配管１８）を切替えるための三方弁１９が配設されている。この三方弁１９は、両経路の湯水を混合して補助熱源機１４に供給するように調整することも可能である。補助熱源機１４は、例えば燃料ガスの燃焼熱を利用して湯水を加熱する燃焼式の熱源機である。 The hot water utilization pipe 18 is branched from the auxiliary heating pipe 12 on the outlet side of the hot water of the auxiliary heat source machine 14 and upstream of the flow rate adjusting valve 16, and the hot water utilization pipe 18 is the auxiliary heating pipe 12 on the inlet side of the pump 15. It is connected to the. A three-way valve 19 for switching between two paths (auxiliary heating pipe 12, hot water utilization pipe 18) for supplying hot water to the auxiliary heat source machine 14 is provided at this connection portion. The three-way valve 19 can also be adjusted so that hot water from both paths is mixed and supplied to the auxiliary heat source machine 14. The auxiliary heat source machine 14 is, for example, a combustion type heat source machine that heats hot water using the combustion heat of fuel gas.
温水利用配管１８には、補助熱源機１４を使用する加熱運転によって加熱された温水が供給される。この温水利用配管１８には、例えば図示外の暖房機器に供給する暖房熱媒を加熱する暖房運転のために温水と暖房熱媒の間で熱交換させる暖房用熱交換器１８ａや、風呂の湯水を加熱（追焚き）する風呂追焚運転のための風呂追焚用熱交換器１８ｂが配設されている。また、温水利用配管１８には、暖房運転時に開放される暖房電磁弁１８ｃや風呂追焚運転時に開放される風呂追焚電磁弁１８ｄ等、給湯以外の温水利用時に開放される電磁弁が配設され、これらの電磁弁よりも下流側の温水利用配管１８に給水配管７から分岐された第２分岐配管２０が接続されている。 Hot water heated by the heating operation using the auxiliary heat source machine 14 is supplied to the hot water utilization pipe 18. The hot water utilization pipe 18 includes, for example, a heating heat exchanger 18a for exchanging heat between hot water and a heating heat medium for a heating operation for heating a heating heat medium supplied to a heating device (not shown), and hot water in a bath. A bath reheating heat exchanger 18b for a bath reheating operation for heating (reheating) the bath is provided. Further, the hot water utilization pipe 18 is provided with solenoid valves that are opened when hot water other than hot water is used, such as a heating solenoid valve 18c that is opened during heating operation and a bath reheating solenoid valve 18d that is opened during bath reheating operation. A second branch pipe 20 branched from the water supply pipe 7 is connected to the hot water utilization pipe 18 on the downstream side of these solenoid valves.
貯湯給湯装置１は、給湯運転等を制御するための制御部２１を備えている。制御部２１は、貯湯温度センサ２ａ等の各部に配設された温度センサの検知温度や、給湯流量センサ１０ａの検知流量等に基づいて、各種弁やポンプ１５等の機器類を作動させる制御を行う。また、制御部２１は、計時機能や給湯使用履歴を記憶する機能等を備え、貯湯給湯装置１の操作や給湯設定温度等の各種設定を行うための操作端末２２が接続されている。 The hot water storage and hot water supply device 1 includes a control unit 21 for controlling hot water supply operation and the like. The control unit 21 controls to operate various devices such as valves and pumps 15 based on the detection temperature of the temperature sensor arranged in each part of the hot water storage temperature sensor 2a and the like, the detection flow rate of the hot water supply flow rate sensor 10a, and the like. Do. Further, the control unit 21 is provided with a time measuring function, a function of storing a hot water supply usage history, and the like, and is connected to an operation terminal 22 for operating the hot water storage and hot water supply device 1 and performing various settings such as hot water supply set temperature.
次に、貯湯給湯装置１の制御方法について説明する。
貯湯運転は、熱源機３が例えばヒートポンプ式熱源機の場合に、この熱源機３を作動させて貯湯槽２の湯水を熱源機３に導入し、熱源機３で貯湯設定温度（例えば６５℃）に加熱した湯水を貯湯槽２の上部から貯湯する。このとき制御部２１は、過去の給湯使用履歴に基づいて予測した貯湯熱量を予測した時刻までに貯湯するように貯湯運転を開始させて貯湯運転制御を行う。熱源機３が発電時の熱を利用して加熱する熱源機の場合には、制御部２１は貯湯温度センサ２ａ〜２ｅの検知温度に基づいて貯湯熱量を取得し、予め定まっている貯湯槽２の貯湯熱量の上限を超えないように放熱動作制御等を行う。
Next, a control method of the hot water storage and hot water supply device 1 will be described.
In the hot water storage operation, when the heat source machine 3 is, for example, a heat pump type heat source machine, the heat source machine 3 is operated to introduce the hot water of the hot water storage tank 2 into the heat source machine 3, and the heat source machine 3 sets the hot water storage temperature (for example, 65 ° C.). The hot water heated to the above is stored from the upper part of the hot water storage tank 2. At this time, the control unit 21 starts the hot water storage operation so as to store the hot water storage heat amount predicted based on the past hot water supply usage history by the predicted time, and performs the hot water storage operation control. When the heat source machine 3 is a heat source machine that heats by using the heat generated during power generation, the control unit 21 acquires the amount of hot water storage heat based on the detected temperatures of the hot water storage temperature sensors 2a to 2e, and the hot water storage tank 2 is predetermined. Control the heat dissipation operation so that the upper limit of the amount of heat stored in the hot water is not exceeded.
給湯運転において、制御部２１は給湯運転制御を行って、混合弁高温水入口温度センサ８ａの検知温度（混合弁高温水入口温度）と給水温度センサ７ａの検知温度（給水温度）と設定されている給湯設定温度に基づいて、給湯温度センサ１０ｂの検知温度が給湯設定温度になるように混合弁４の混合比を調整する。この給湯運転制御について図２のフローチャートに基づいて説明する。尚、フローチャート中のＳｉ（ｉ＝１，２，・・・）はステップを表す。 In the hot water supply operation, the control unit 21 controls the hot water supply operation and sets the detection temperature of the mixing valve high temperature water inlet temperature sensor 8a (mixing valve high temperature water inlet temperature) and the detection temperature of the water supply temperature sensor 7a (water supply temperature). The mixing ratio of the mixing valve 4 is adjusted so that the detected temperature of the hot water supply temperature sensor 10b becomes the hot water supply set temperature based on the hot water supply set temperature. This hot water supply operation control will be described with reference to the flowchart of FIG. In addition, Si (i = 1, 2, ...) In the flowchart represents a step.
給湯栓１１の開栓等によって給湯流量センサ１０ａが所定流量以上の流量を検知すると、給湯運転制御が開始される。Ｓ１において貯湯温度センサ２ａ等の検知温度と給湯設定温度に基づいて、給湯に使用するために高温水を貯湯槽２から混合弁４に供給するか否か判定する。高温水の供給源を貯湯槽２と補助熱源機１４から選択するステップである。判定がＹｅｓの場合はＳ２進み、Ｓ２において貯湯槽２から高温水を供給して混合弁４の混合比を調整し、給湯設定温度の給湯を行ってＳ３に進む。 When the hot water supply flow rate sensor 10a detects a flow rate equal to or higher than a predetermined flow rate by opening the hot water supply plug 11, the hot water supply operation control is started. In S1, it is determined whether or not to supply high temperature water from the hot water storage tank 2 to the mixing valve 4 for use in hot water supply based on the detection temperature of the hot water storage temperature sensor 2a and the hot water supply set temperature. This is a step of selecting the hot water supply source from the hot water storage tank 2 and the auxiliary heat source machine 14. If the determination is Yes, the process proceeds to S2, and in S2, high-temperature water is supplied from the hot water storage tank 2 to adjust the mixing ratio of the mixing valve 4, hot water is supplied at the hot water supply set temperature, and the process proceeds to S3.
Ｓ３において、高温水を供給するための貯湯熱量が貯湯槽２に残っているか否か判定する。判定がＹｅｓの場合はＳ４に進み、Ｓ４において給湯流量センサ１０ａが所定流量以上の流量を検知しているか否か判定する。判定がＹｅｓの場合はＳ２に戻り、判定がＮｏの場合はＳ７に進む。 In S3, it is determined whether or not the amount of heat stored in the hot water for supplying the high temperature water remains in the hot water storage tank 2. If the determination is Yes, the process proceeds to S4, and it is determined whether or not the hot water supply flow rate sensor 10a detects a flow rate equal to or higher than a predetermined flow rate in S4. If the determination is Yes, the process returns to S2, and if the determination is No, the process proceeds to S7.
一方、Ｓ１の判定がＮｏの場合、又はＳ３の判定がＮｏの場合にはＳ５に進む。そしてＳ５において、補助熱源機１４を使用する加熱運転で加熱した湯水を高温水として混合弁４に供給すると共に混合弁４の混合比を調整し、給湯設定温度の給湯を行ってＳ６に進む。Ｓ６において給湯流量センサ１０ａが所定流量以上の流量を検知しているか否か判定する。判定がＹｅｓの場合はＳ５に戻り、判定がＮｏの場合はＳ７に進む。 On the other hand, if the determination of S1 is No, or if the determination of S3 is No, the process proceeds to S5. Then, in S5, the hot water heated in the heating operation using the auxiliary heat source machine 14 is supplied to the mixing valve 4 as high-temperature water, the mixing ratio of the mixing valve 4 is adjusted, and the hot water at the set hot water supply temperature is supplied to proceed to S6. In S6, it is determined whether or not the hot water supply flow rate sensor 10a detects a flow rate equal to or higher than a predetermined flow rate. If the determination is Yes, the process returns to S5, and if the determination is No, the process proceeds to S7.
Ｓ４の判定がＮｏの場合、又はＳ６の判定がＮｏの場合にＳ７において、給湯待機制御に移行して給湯運転制御を停止する。 When the determination in S4 is No, or when the determination in S6 is No, in S7, the hot water supply standby control is shifted to and the hot water supply operation control is stopped.
上記のように、高温水の供給源が貯湯槽２の場合は、貯湯温度センサ２ａ〜２ｅの検知温度等に基づいて貯湯熱量を取得する。高温水の供給源が補助熱源機１４の場合には、第２分岐配管２０を介して低温水を補助熱源機１４に供給するために三方弁１９を温水利用配管１８側に切替えてポンプ１５を起動し、補助熱源機１４を作動させて加熱運転を制御する。 As described above, when the hot water supply source is the hot water storage tank 2, the hot water storage heat amount is acquired based on the detection temperature of the hot water storage temperature sensors 2a to 2e. When the hot water supply source is the auxiliary heat source machine 14, the three-way valve 19 is switched to the hot water utilization pipe 18 side to supply the low temperature water to the auxiliary heat source machine 14 via the second branch pipe 20, and the pump 15 is operated. It starts up and operates the auxiliary heat source machine 14 to control the heating operation.
給湯によって貯湯熱量が減少して、貯湯槽２から補助熱源機１４に高温水の供給源を切替える場合にも、三方弁１９を補助加熱配管１２側に切替えてポンプ１５を起動し、補助熱源機１４を作動させて加熱運転を制御する。尚、補助熱源機１４で加熱して給湯する際には、出湯配管８に供給された高温水の一部が補助加熱配管１２に流入するように三方弁１９を調整すると共にポンプ１５の吐出量を増やすことにより、貯湯槽２の湯水が出湯配管８の高温水に混入しないようにして、良好な出湯特性を確保している。 Even when the amount of heat stored in hot water decreases due to hot water supply and the supply source of high-temperature water is switched from the hot water storage tank 2 to the auxiliary heat source machine 14, the three-way valve 19 is switched to the auxiliary heating pipe 12 side to start the pump 15 and the auxiliary heat source machine. 14 is operated to control the heating operation. When the auxiliary heat source machine 14 heats and supplies hot water, the three-way valve 19 is adjusted so that a part of the high-temperature water supplied to the hot water outlet pipe 8 flows into the auxiliary heating pipe 12, and the discharge amount of the pump 15. By increasing the number of hot water, the hot water of the hot water storage tank 2 is prevented from being mixed with the high temperature water of the hot water discharge pipe 8, and good hot water discharge characteristics are ensured.
給湯栓１１の閉栓等によって給湯流量センサ１０ａの検知流量が所定流量未満になると、制御部２１は給湯運転制御を停止し、給湯待機状態になる。給湯使用者の利便性向上のために、貯湯給湯装置１には給湯が開始されたときに早く給湯設定温度の給湯ができることが要求されている。そのため制御部２１は、給湯待機中に次回の給湯運転で早く給湯設定温度の給湯ができるように給湯待機制御を実行する。 When the detected flow rate of the hot water supply flow rate sensor 10a becomes less than the predetermined flow rate due to the closing of the hot water supply plug 11, the control unit 21 stops the hot water supply operation control and enters the hot water supply standby state. In order to improve the convenience of hot water supply users, the hot water storage hot water supply device 1 is required to be able to quickly supply hot water at a set temperature when hot water supply is started. Therefore, the control unit 21 executes the hot water supply standby control so that the hot water supply set temperature can be quickly supplied in the next hot water supply operation during the hot water supply standby.
給湯待機制御では、混合弁高温水入口温度等に応じて、給湯設定温度の給湯が可能なように混合弁４の混合比を調整する。これにより、給湯開始後に早く給湯設定温度の給湯をすることが可能になる。この給湯待機制御について、図３のフローチャートに基づいて説明する。 In the hot water supply standby control, the mixing ratio of the mixing valve 4 is adjusted so that hot water can be supplied at the hot water supply set temperature according to the high temperature water inlet temperature of the mixing valve. As a result, it becomes possible to supply hot water at a set temperature for hot water supply soon after the start of hot water supply. This hot water supply standby control will be described with reference to the flowchart of FIG.
給湯運転制御が停止されて給湯待機制御が開始されると、Ｓ１０において暖房運転等のために温水利用中か否か判定する。判定がＹｅｓの場合はＳ１１に進み、判定がＮｏの場合はＳ１９に進む。 When the hot water supply operation control is stopped and the hot water supply standby control is started, it is determined in S10 whether or not hot water is being used for the heating operation or the like. If the determination is Yes, the process proceeds to S11, and if the determination is No, the process proceeds to S19.
Ｓ１１において、貯湯給湯装置１内の各所に配設された温度センサが検知した湯水温度と給水温度センサ７ａが検知した給水温度を取得してＳ１２に進む。湯水温度を取得する温度センサは、混合弁４の高温水入口よりも上流側の配管等に配設された温度センサであり、少なくとも貯湯槽２の上部に配設された貯湯温度センサ２ａ、混合弁高温水入口温度センサ８ａ、補助熱源機出口温度センサ１２ａ、流量調整弁温度センサ１６ａが含まれる。 In S11, the hot water temperature detected by the temperature sensors arranged in various places in the hot water storage device 1 and the water supply temperature detected by the water supply temperature sensor 7a are acquired, and the process proceeds to S12. The temperature sensor for acquiring the hot water temperature is a temperature sensor arranged in a pipe or the like on the upstream side of the high temperature water inlet of the mixing valve 4, and at least the hot water storage temperature sensor 2a arranged in the upper part of the hot water storage tank 2 is mixed. The valve high temperature water inlet temperature sensor 8a, the auxiliary heat source machine outlet temperature sensor 12a, and the flow control valve temperature sensor 16a are included.
Ｓ１２において、Ｓ１１で取得した温水温度のうち最も高い温水温度を抽出してＳ１３に進む。そしてＳ１３において、Ｓ１２で抽出した温水温度とＳ１１で取得した給水温度と設定されている給湯設定温度に基づいて、混合弁４の混合比を調整してＳ１４に進む。このとき、混合比を調整することによって、混合弁４に最も高温の湯水が供給されても給湯設定温度の給湯が可能な状態に準備しておく。 In S12, the highest hot water temperature among the hot water temperatures acquired in S11 is extracted, and the process proceeds to S13. Then, in S13, the mixing ratio of the mixing valve 4 is adjusted based on the hot water temperature extracted in S12, the water supply temperature acquired in S11, and the set hot water supply set temperature, and the process proceeds to S14. At this time, by adjusting the mixing ratio, the mixing valve 4 is prepared so that the hot water can be supplied at the set temperature even if the hot water is supplied to the mixing valve 4.
Ｓ１４において、暖房運転等の温水利用が停止されたか否か判定する。温水利用が停止されて判定がＹｅｓの場合はＳ１５に進み、温水利用が継続されて判定がＮｏの場合はＳ１１に戻る。Ｓ１５において、温水利用停止から所定時間（例えば１０分）が経過したか否か判定する。所定時間経過により判定がＹｅｓの場合はＳ１６に進み、判定がＮｏの場合はＳ１１に戻る。 In S14, it is determined whether or not the use of hot water such as heating operation is stopped. If the use of hot water is stopped and the determination is Yes, the process proceeds to S15, and if the use of hot water is continued and the determination is No, the process returns to S11. In S15, it is determined whether or not a predetermined time (for example, 10 minutes) has elapsed from the suspension of use of hot water. If the determination is Yes, the process proceeds to S16, and if the determination is No, the process returns to S11.
Ｓ１６において、混合弁４の現在の混合比を維持してＳ１７に進む。次回の給湯運転が開始されたときに混合弁４に供給される可能性がある湯水のうち最も高い湯水温度に応じた混合比に調整されているので、給湯設定温度よりも高温の給湯を防ぐことができる。そしてＳ１７において温水利用が開始されたか否か判定し、判定がＹｅｓの場合はＳ１１に戻り、判定がＮｏの場合はＳ１８に進む。Ｓ１８において給湯が開始されたか否か判定し、判定がＹｅｓの場合はＳ２５に進んで給湯運転制御に移行して給湯待機制御を停止し、判定がＮｏの場合はＳ１７に戻る。 In S16, the current mixing ratio of the mixing valve 4 is maintained and the process proceeds to S17. Since the mixing ratio is adjusted according to the highest hot water temperature of the hot water that may be supplied to the mixing valve 4 when the next hot water supply operation is started, hot water supply that is higher than the hot water supply set temperature is prevented. be able to. Then, it is determined in S17 whether or not the use of hot water has been started, and if the determination is Yes, the process returns to S11, and if the determination is No, the process proceeds to S18. In S18, it is determined whether or not the hot water supply has been started. If the determination is Yes, the process proceeds to S25 to shift to the hot water supply operation control and stop the hot water supply standby control. If the determination is No, the process returns to S17.
一方、Ｓ１０の判定がＮｏの場合にＳ１９において、給湯運転停止から予め設定された待機時間（例えば１０分）が経過したか否か判定する。待機時間が経過しておらず判定がＮｏの場合はＳ２０に進み、Ｓ２０において混合弁高温水入口温度と、給水温度を取得してＳ２１に進む。そしてＳ２１において、Ｓ２０で取得した混合弁高温水入口温度と給水温度と設定されている給湯設定温度に基づいて、混合弁４の混合比を調整してＳ２３に進む。このとき、混合弁高温水入口温度の湯水を給湯設定温度で給湯が可能な状態に準備している。待機時間が経過してＳ１９の判定がＹｅｓの場合はＳ２２に進み、Ｓ２２において混合弁４の現在の混合比を維持してＳ２３に進む。 On the other hand, when the determination in S10 is No, in S19, it is determined whether or not a preset standby time (for example, 10 minutes) has elapsed from the stop of the hot water supply operation. If the standby time has not elapsed and the determination is No, the process proceeds to S20, and in S20, the high temperature water inlet temperature of the mixing valve and the water supply temperature are acquired and the process proceeds to S21. Then, in S21, the mixing ratio of the mixing valve 4 is adjusted based on the high temperature water inlet temperature of the mixing valve and the hot water supply temperature set in S20, and the process proceeds to S23. At this time, hot water at the high temperature water inlet temperature of the mixing valve is prepared so that hot water can be supplied at the hot water supply set temperature. If the standby time elapses and the determination in S19 is Yes, the process proceeds to S22, and in S22, the current mixing ratio of the mixing valve 4 is maintained and the process proceeds to S23.
Ｓ２３において、温水利用が開始されたか否か判定し、判定がＹｅｓの場合はＳ１１に移行し、判定がＮｏの場合はＳ２４に進む。Ｓ２４において給湯が開始されたか否か判定し、判定がＹｅｓの場合はＳ２５に進んで給湯運転制御に移行して給湯待機制御を停止し、判定がＮｏの場合はＳ１９に戻る。 In S23, it is determined whether or not the use of hot water has been started. If the determination is Yes, the process proceeds to S11, and if the determination is No, the process proceeds to S24. It is determined in S24 whether or not the hot water supply has been started. If the determination is Yes, the process proceeds to S25 to shift to the hot water supply operation control and stop the hot water supply standby control. If the determination is No, the process returns to S19.
上記のように、給湯待機制御開始時に温水利用中でない場合に制御部２１は、給湯停止後に待機時間が経過するまでは、混合弁高温水入口温度に応じて混合弁４の混合比を給湯設定温度の給湯ができるように調整する。これにより、給湯開始後に早く給湯設定温度の給湯をすることが可能になる。 As described above, when hot water is not being used at the start of hot water supply standby control, the control unit 21 sets the mixing ratio of the mixing valve 4 according to the high temperature water inlet temperature of the mixing valve until the standby time elapses after the hot water supply is stopped. Adjust so that hot water can be supplied at the temperature. As a result, it becomes possible to supply hot water at a set temperature for hot water supply soon after the start of hot water supply.
例えば暖房運転のために、給湯待機制御開始時に温水利用中である場合又は給湯待機制御中に温水利用を開始した場合には、制御部２１は、暖房電磁弁１８ｃを開放し、三方弁１９を温水利用配管１８側に切替えてポンプ１５を起動し、補助熱源機１４を作動させて加熱運転を制御する。加熱運転では、湯水を予め暖房運転用に定められた温度（例えば８０℃）に加熱する。 For example, when hot water is being used at the start of hot water supply standby control for heating operation, or when hot water is started during hot water supply standby control, the control unit 21 opens the heating solenoid valve 18c and opens the three-way valve 19. The pump 15 is started by switching to the hot water utilization pipe 18 side, and the auxiliary heat source machine 14 is operated to control the heating operation. In the heating operation, the hot water is heated to a temperature (for example, 80 ° C.) predetermined for the heating operation.
これと同時に制御部２１は、混合弁４の高温水入口よりも上流側の配管等に配設された温度センサが検知した湯水温度のうち、最も高い湯水温度に応じて混合弁４の混合比を調整する。即ち、給湯運転の開始によって混合弁４に供給される可能性がある最も高い湯水温度に応じて混合弁４の混合比を調整する。給湯運転が開始された場合に温水利用のために加熱された湯水が流量調整弁１６を通って出湯配管８に流入しても、既に最も高い温水温度に応じた混合比で準備しているので、給湯設定温度よりも高温の給湯にならない。 At the same time, the control unit 21 determines the mixing ratio of the mixing valve 4 according to the highest hot water temperature among the hot water temperatures detected by the temperature sensor arranged in the piping or the like on the upstream side of the high temperature water inlet of the mixing valve 4. To adjust. That is, the mixing ratio of the mixing valve 4 is adjusted according to the highest temperature of hot water that may be supplied to the mixing valve 4 when the hot water supply operation is started. Even if hot water heated for hot water use flows into the hot water outlet pipe 8 through the flow rate adjusting valve 16 when the hot water supply operation is started, it is already prepared at the mixing ratio according to the highest hot water temperature. , The hot water supply temperature is not higher than the set temperature.
温水利用中に給湯するときには、制御部２１は、通常の単独の給湯運転と同様に、混合弁４に高温水を供給する供給源を選択して給湯運転を制御する。高温水の供給源が補助熱源機１４の場合は、温水利用のための加熱運転と給湯のための加熱運転を併せて実行する。 When hot water is supplied while hot water is being used, the control unit 21 controls the hot water supply operation by selecting a supply source for supplying high temperature water to the mixing valve 4 as in the normal single hot water supply operation. When the hot water supply source is the auxiliary heat source machine 14, the heating operation for using the hot water and the heating operation for hot water supply are performed together.
本発明の作用、効果について説明する。
温水利用配管１８の湯水を利用する機能を有する貯湯給湯装置１は、混合弁４で湯水を給湯設定温度に調整して給湯する給湯運転制御を実行する。また、給湯運転制御停止後に待機時間が経過するまでは、給湯設定温度の給湯が可能なように混合弁４の高温水入口の湯水温度に応じて混合比を調整する給湯待機制御を実行する。給湯待機制御では、所定条件下で混合弁４に供給される可能性がある湯水のうち最も高温の湯水温度に応じて混合比を調整する。従って、給湯待機中に給湯運転が開始されたときに、混合弁４に最も高温の湯水が供給されても給湯設定温度の給湯が可能な状態に準備されているので、給湯設定温度よりも高温の給湯を防ぐことができる。
The action and effect of the present invention will be described.
The hot water storage hot water supply device 1 having a function of using hot water from the hot water utilization pipe 18 executes hot water supply operation control in which hot water is adjusted to a hot water supply set temperature by a mixing valve 4. Further, until the standby time elapses after the hot water supply operation control is stopped, the hot water supply standby control that adjusts the mixing ratio according to the hot water temperature at the high temperature water inlet of the mixing valve 4 is executed so that the hot water can be supplied at the hot water supply set temperature. In the hot water supply standby control, the mixing ratio is adjusted according to the hottest water temperature of the hot water that may be supplied to the mixing valve 4 under predetermined conditions. Therefore, when the hot water supply operation is started during the hot water supply standby, the temperature is higher than the hot water supply set temperature because the hot water supply set temperature can be supplied even if the hot water supply is supplied to the mixing valve 4. Can prevent hot water supply.
所定条件として、温水利用配管１８に温水を供給するための加熱運転が実行中であるときには、混合弁４に供給される可能性がある湯水のうち最も高温の湯水温度に応じて混合比を調整する。従って、給湯待機中に給湯が開始されたときに、温水利用のために混合弁４に最も高温の湯水が供給されても給湯設定温度よりも高温の給湯を防ぐことができる。 As a predetermined condition, when the heating operation for supplying hot water to the hot water utilization pipe 18 is being executed, the mixing ratio is adjusted according to the hottest water temperature of the hot water that may be supplied to the mixing valve 4. To do. Therefore, when the hot water supply is started during the hot water supply standby, even if the hot water supply having the highest temperature is supplied to the mixing valve 4 for the use of the hot water supply, it is possible to prevent the hot water supply having a temperature higher than the hot water supply set temperature.
混合手段は、高温水の流量調整弁の流量と低温水の流量調整弁の流量を夫々調整することにより混合比を調整するように構成された混合装置であってもよい。この場合も上記実施例と同等の効果が得られる。その他、当業者であれば、本発明の趣旨を逸脱することなく、上記実施形態に種々の変更を付加した形態で実施可能であり、本発明はそのような変更形態を包含するものである。 The mixing means may be a mixing device configured to adjust the mixing ratio by adjusting the flow rate of the high temperature water flow rate adjusting valve and the flow rate of the low temperature water flow rate adjusting valve, respectively. In this case as well, the same effect as that of the above embodiment can be obtained. In addition, a person skilled in the art can carry out the embodiment in a form in which various modifications are added to the above embodiment without departing from the spirit of the present invention, and the present invention includes such modified embodiments.
１ ：貯湯給湯装置
２ ：貯湯槽
２ａ〜２ｅ ：貯湯温度センサ
３ ：熱源機
４ ：混合弁（混合手段）
５ ：熱源機往き配管
５ａ ：熱源機往き温度センサ
６ ：熱源機戻り配管
６ａ ：熱源機戻り温度センサ
７ ：給水配管
７ａ ：給水温度センサ
８ ：出湯配管
８ａ ：混合弁高温水入口温度センサ
９ ：第１分岐配管（分岐配管）
１０ ：給湯配管
１０ａ ：給湯流量センサ
１０ｂ ：給湯温度センサ
１０ｃ ：給湯流量調整弁
１１ ：給湯栓
１２ ：補助加熱配管
１２ａ ：補助熱源機出口温度センサ
１４ ：補助熱源機
１５ ：ポンプ
１６ ：流量調整弁
１６ａ ：流量調整弁温度センサ
１８ ：温水利用配管
１８ａ ：暖房用熱交換器
１８ｂ ：風呂追焚用熱交換器
１８ｃ ：暖房電磁弁
１８ｄ ：風呂追焚電磁弁
１９ ：三方弁
２０ ：第２分岐配管
２１ ：制御部
２２ ：操作端末
1: Hot water storage device 2: Hot water storage tanks 2a to 2e: Hot water storage temperature sensor 3: Heat source machine 4: Mixing valve (mixing means)
5: Heat source machine going pipe 5a: Heat source machine going temperature sensor 6: Heat source machine return pipe 6a: Heat source machine return temperature sensor 7: Water supply pipe 7a: Water supply temperature sensor 8: Hot water outlet pipe 8a: Mixing valve high temperature water inlet temperature sensor 9: 1st branch pipe (branch pipe)
10: Hot water supply pipe 10a: Hot water supply flow rate sensor 10b: Hot water supply temperature sensor 10c: Hot water supply flow rate adjustment valve 11: Hot water supply tap 12: Auxiliary heating pipe 12a: Auxiliary heat source machine outlet temperature sensor 14: Auxiliary heat source machine 15: Pump 16: Flow control valve 16a: Flow control valve Temperature sensor 18: Hot water utilization piping 18a: Heating heat exchanger 18b: Bath reheating heat exchanger 18c: Heating electromagnetic valve 18d: Bath reheating electromagnetic valve 19: Three-way valve 20: Second branch piping 21: Control unit 22: Operation terminal
Claims (2)
前記給湯待機制御では、所定条件下で前記混合手段の高温水入口よりも上流の湯水温度のうち最も高温の湯水温度に応じて前記混合手段の混合比を調整することを特徴とする貯湯給湯装置の制御方法。 A hot water storage tank that stores hot water, a heat source machine that circulates and heats the hot water in the hot water storage tank, a water supply pipe connected to the bottom of the hot water storage tank, a hot water outlet pipe connected to the top of the hot water storage tank, and the above. A mixing means in which a branch pipe of a water supply pipe and the hot water supply pipe and a hot water supply pipe are connected, an auxiliary heating pipe branched from the hot water supply pipe and connected to the hot water outlet pipe on the mixing means side of the branch portion, and the auxiliary The auxiliary heat source machine interposed in the heating pipe, the pump interposed in the auxiliary heating pipe on the inlet side of the auxiliary heat source machine, and the pump branched from the auxiliary heating pipe on the outlet side of the auxiliary heat source machine. A hot water storage device provided with a hot water utilization pipe connected to the auxiliary heating pipe on the inlet side of the above, and the mixing means for mixing high temperature water supplied from the hot water outlet pipe and low temperature water supplied from the branch pipe. The hot water supply operation control in which hot water water adjusted to the hot water supply set temperature by adjusting the mixing ratio of the above is supplied from the hot water supply pipe, and the mixing means of the mixing means until a preset standby time elapses after the hot water supply operation control is stopped. In the control method of the hot water storage hot water supply device that executes the hot water supply standby control that adjusts the mixing ratio of the mixing means according to the hot water temperature of the high temperature water inlet.
The hot water supply standby control is characterized in that the mixing ratio of the mixing means is adjusted according to the hottest water temperature among the hot water temperatures upstream of the high temperature water inlet of the mixing means under predetermined conditions. Control method.
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