JP6110228B2

JP6110228B2 - Heat pump hot water storage hot water supply system for solar power generation equipment

Info

Publication number: JP6110228B2
Application number: JP2013133243A
Authority: JP
Inventors: 本間　誠; 誠本間; 和也佐山; 松尾　亮; 亮松尾
Original assignee: Corona Corp
Current assignee: Corona Corp
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2017-04-05
Anticipated expiration: 2033-06-26
Also published as: JP2015007507A

Description

本発明は、太陽光発電装置の余剰電力を消費可能としたヒートポンプ貯湯式給湯装置に関するものである。 The present invention relates to a heat pump hot water storage type hot water supply device that can consume surplus power of a solar power generation device.

従来よりこの種の太陽光発電装置と共に用いられるヒートポンプ貯湯式給湯装置においては、特許文献１に開示されているように、太陽光発電装置の発電よりも家庭内で消費する電力量が少なく余剰電力が生じた場合に、ヒートポンプ貯湯式給湯装置で湯水を沸き上げることで余剰電力を温熱に変換して貯蔵するようにしたものがあった。 Conventionally, in a heat pump hot water storage type hot water supply device used together with this type of solar power generation device, as disclosed in Patent Document 1, less power is consumed in the home than the power generation of the solar power generation device, and surplus power. When this occurs, there is one in which excess power is converted into warm heat and stored by boiling hot water with a heat pump hot water storage type hot water supply device.

特開２００４−１９４４８５号公報JP 2004-194485 A

ところが、この従来のものでは、以下のような問題が生じる。
太陽光発電装置の発電による余剰電力は昼間時間がピークとなる一方で、貯湯式給湯装置は一日の給湯分を特定の時間帯（深夜時間帯）に沸き上げて貯湯しておくものであり、給湯需要は夕方以降に集中する傾向があるため、太陽光発電装置の発電によって余剰電力が生じる時間帯には、貯湯式給湯装置の貯湯タンク内は中温から高温の湯水が貯湯タンクの最下部まで存在する満タンに近い状態となっていることが多い。 However, this conventional apparatus has the following problems.
The surplus power generated by the solar power generation system has a peak during the daytime, while the hot water storage hot water supply system heats up the hot water of the day in a specific time zone (midnight) and stores hot water. Because hot water supply demand tends to concentrate after the evening, during the time when surplus power is generated by the power generation of the solar power generator, the hot water in the hot water storage tank of the hot water storage system is at the bottom of the hot water tank. It is often close to a full tank that exists.

そのため、余剰電力が生じている時に湯水を沸き上げようとしても、貯湯タンク内の下部にまで中温から高温の湯水があるため、中温から高温の湯水をヒートポンプ式加熱手段で沸き上げようとすると、ヒートポンプ加熱手段における加熱効率が極めて低い状態となるか、あるいはヒートポンプサイクルに高圧異常を来して沸き上げることができないという問題があり、図３に示すように、給湯によって貯湯タンク内に低温の水が多く貯まるまで沸き上げることができず、余剰電力を沸き上げに使うことができないと共に、買電料金が掛かってしまうという問題があった。 Therefore, even if you try to boil hot water when surplus power is generated, there is hot water from medium temperature to high temperature in the lower part of the hot water tank, so if you try to boil hot water from medium temperature to hot water with heat pump heating means, There is a problem that the heating efficiency in the heat pump heating means becomes extremely low, or there is a problem that high temperature abnormality occurs in the heat pump cycle and the water cannot be heated. As shown in FIG. There was a problem that it could not be boiled until a large amount of electricity was stored, surplus power could not be used for boiling, and a power purchase fee would be charged.

そこで、本発明は上記課題を解決するため、湯水を貯湯する貯湯タンクと、前記貯湯タンク下部から取り出した湯水を加熱して前記貯湯タンクの上部に戻すようにして貯湯タンク内の湯水を沸き上げるヒートポンプ式加熱手段と、前記ヒートポンプ式加熱手段で沸き上げる湯水の沸き上げ目標温度を決定する沸き上げ目標温度決定手段と、特定の時間帯において沸き上げ目標温度で貯湯タンクの全量を沸き上げるよう前記ヒートポンプ式加熱手段を制御する沸き上げ制御手段と、を備えたヒートポンプ貯湯式給湯装置において、太陽光発電装置を並設しているか否かを設定する太陽光設定手段と、前記太陽光設定手段にて太陽光発電装置が並設されていることが設定されている場合には、前記沸き上げ目標温度決定手段が決定した前記沸き上げ目標温度を太陽光発電装置が並設されていない場合に比べて高い温度に補正する沸き上げ目標温度補正手段と、を設け、前記沸き上げ制御手段は、前記太陽光設定手段に太陽光発電装置を並設している設定がされている場合に、補正前の前記沸き上げ目標温度で前記貯湯タンクの全量を沸き上げた場合とを同じ貯湯熱量を、前記沸き上げ目標温度補正手段で高い温度に補正された前記沸き上げ目標温度で前記特定の時間帯において沸き上げて、前記貯湯タンク下部に未加熱の水を確保するようにした。
Therefore, in order to solve the above problems, the present invention boils hot water in a hot water storage tank so as to store hot water and hot water taken out from the lower part of the hot water tank and return it to the upper part of the hot water tank. Heat pump type heating means, boiling target temperature determining means for determining a boiling target temperature of hot water heated by the heat pump type heating means, and heating the hot water storage tank at the boiling target temperature in a specific time zone In a heat pump hot water storage type hot water supply device comprising a heating control means for controlling a heat pump heating means, a solar light setting means for setting whether or not a solar power generation device is arranged in parallel, and the solar light setting means If the solar power generation apparatus is set in parallel, the boiling target temperature determined by the boiling target temperature determining means is determined. A boiling target temperature correcting means for correcting the target temperature to a temperature higher than that in the case where the photovoltaic power generators are not arranged in parallel, and the boiling control means is provided on the solar power setting means. Are set in parallel , the same amount of hot water is stored in the boiling target temperature correction means as in the case where the entire amount of the hot water storage tank is boiled at the boiling target temperature before correction. and boiled in corrected the boiling target temperature the specific time zone in and to ensure the unheated water to the hot water storage tank bottom.

また、前記沸き上げ制御手段は、前記太陽光発電装置と前記ヒートポンプ貯湯式給湯装置とが並設された建物内の発電状況、電力消費状況を監視すると共に、余剰電力の発生時に前記ヒートポンプ貯湯式給湯装置に対して沸き上げの開始を指示するエネルギー管理装置と通信可能に接続され、前記エネルギー管理装置からの沸き上げの開始指示に応じて、前記貯湯タンク下部の未加熱の水を沸き上げるようにした。 The boiling control means monitors the power generation status and power consumption status in a building in which the solar power generation device and the heat pump hot water storage type hot water supply device are juxtaposed, and when the surplus power is generated, the heat pump hot water storage type A hot water supply device is communicably connected to an energy management device instructing the start of boiling. In response to a boiling start command from the energy management device, unheated water below the hot water storage tank is boiled. I made it.

また、前記太陽光設定手段は、前記エネルギー管理装置からの指示によって前記設定の状態を切り換え可能としている。 Moreover, the said sunlight setting means can switch the said setting state by the instruction | indication from the said energy management apparatus.

また、前記沸き上げ目標温度補正手段は、予め定められた所定温度を前記沸き上げ目標温度決定手段で決定された沸き上げ目標温度に加算して、これを補正後の沸き上げ目標温度とし、前記沸き上げ制御手段は、補正前の前記沸き上げ目標温度と前記貯湯タンクの容量の積を、前記沸き上げ目標温度補正手段で補正された沸き上げ目標温度で除すことで沸き上げ容量を算出し、この沸き上げ容量に基づいて沸き上げを停止することで前記貯湯タンク下部に未加熱の水を確保するようにした。 Further, the boiling target temperature correcting means adds a predetermined temperature determined in advance to the boiling target temperature determined by the boiling target temperature determining means, which is used as a corrected boiling target temperature, The boiling control means calculates the boiling capacity by dividing the product of the boiling target temperature before correction and the capacity of the hot water storage tank by the boiling target temperature corrected by the boiling target temperature correction means. Then, by stopping the boiling based on the boiling capacity, unheated water is secured at the lower part of the hot water storage tank.

また、前記沸き上げ目標温度補正手段は、前記貯湯タンクの容量から予め定められた確保水量を減算した容量で、前記沸き上げ目標温度決定手段により決定された沸き上げ目標温度で前記貯湯タンクを全量沸き上げた熱量を確保できる沸き上げ目標温度を算出し、これを補正後の沸き上げ目標温度とし、前記貯湯タンクの容量から前記確保水量を減算した容量に基づいて沸き上げを停止することで前記貯湯タンク下部に未加熱の水を確保するようにした。 Further, the boiling target temperature correction means has a capacity obtained by subtracting a predetermined reserved water amount from the capacity of the hot water storage tank, and the hot water storage tank is fully charged at the boiling target temperature determined by the boiling target temperature determination means. A boiling target temperature that can secure the amount of heat that has been boiled is calculated, and this is used as a corrected boiling target temperature, and the boiling is stopped based on the capacity obtained by subtracting the reserved water volume from the capacity of the hot water storage tank. Unheated water was secured at the bottom of the hot water storage tank.

本発明によれば、太陽光発電装置が並設されている場合には、高い温度に補正された沸き上げ目標温度で貯湯タンク下部に未加熱の水を確保するように沸き上げるようにしたことによって、特定の時間帯の沸き上げ完了からお湯を多量に使うまでの間にも、太陽光発電装置の発電の余剰電力が発生した時には余剰電力を使って沸き上げ運転を行うことを可能とし、さらには、この沸き上げ運転時に加熱する水は未加熱の水であるため、ヒートポンプ加熱手段における加熱効率を向上させることができる。 According to the present invention, when the photovoltaic power generators are arranged side by side, boiling is performed so as to secure unheated water below the hot water storage tank at the boiling target temperature corrected to a high temperature. Makes it possible to perform boiling operation using surplus power when surplus power generated by the solar power generation device is generated, even from the completion of boiling in a specific time period until a large amount of hot water is used, Furthermore, since the water heated at the time of this boiling operation is unheated water, the heating efficiency in a heat pump heating means can be improved.

本発明の一実施形態の概略構成図Schematic configuration diagram of one embodiment of the present invention 同一実施形態の作動を説明するためのタイムチャートTime chart for explaining the operation of the same embodiment 従来のものの作動を説明するためのタイムチャートTime chart for explaining the operation of the conventional one

次に、本発明の一実施形態の太陽光発電装置対応ヒートポンプ貯湯式給湯装置について図面に基づいて説明する。
１はヒートポンプ貯湯式給湯装置、２は電力系統が同一の建物に設置された太陽光発電装置、３は太陽光発電装置２の発電する直流電力を交流に変換するパワーコンディショナ、４は商用電源５からの電力あるいはパワーコンディショナ３からの電力を建物内に分電し、余剰電力がある場合に逆潮流させて売電可能とした分電盤、６は売買電に対応した電力量メータ、７は家電機器等の電力負荷機器である。 Next, a heat pump hot water storage type hot water supply apparatus for solar power generation apparatus according to an embodiment of the present invention will be described with reference to the drawings.
1 is a heat pump hot water storage type hot water supply device, 2 is a solar power generation device installed in the same power system building, 3 is a power conditioner that converts DC power generated by the solar power generation device 2 into AC, and 4 is a commercial power source A distribution board that distributes the power from 5 or the power conditioner 3 into the building and makes it possible to sell power by making a reverse flow when there is surplus power, 6 is an energy meter corresponding to trading power, Reference numeral 7 denotes a power load device such as a home appliance.

８は建物内の消費電力状況および太陽光発電装置２の発電状況を監視して、太陽光発電装置２による余剰電力が生じているかを判定し、余剰電力が生じている場合に、ヒートポンプ貯湯式給湯装置１に対して沸き上げ要求を出力すると共に、太陽光発電装置２の発電状況に基づき季節的要因等で発電が見込めない状況であると判断した場合にヒートポンプ貯湯式給湯装置１に対して発電不能である旨を出力し、太陽光発電装置２の発電状況に基づいて十分な発電量が見込める状況であると判断した場合にヒートポンプ貯湯式給湯装置１に対して発電可能である旨を出力するＨＥＭＳコントローラ等のエネルギー管理装置で、パワーコンディショナ３からの発電電力の電流値と、電力量メータ６と分電盤４の間の電流値および流れ方向を検出するための電流センサ９が接続されているものである。 8 monitors the power consumption status in the building and the power generation status of the solar power generation device 2, determines whether surplus power is generated by the solar power generation device 2, and if surplus power is generated, the heat pump hot water storage type When a boiling request is output to the hot water supply device 1 and it is determined that power generation cannot be expected due to seasonal factors based on the power generation status of the solar power generation device 2, the heat pump hot water storage type hot water supply device 1 is Outputs that power generation is impossible, and outputs that heat generation is possible to the heat pump hot water storage hot water supply device 1 when it is determined that a sufficient amount of power generation can be expected based on the power generation status of the solar power generation device 2 An energy management device such as a HEMS controller detects the current value of the generated power from the power conditioner 3, the current value between the power meter 6 and the distribution board 4, and the flow direction. A current sensor 9 for is being connected.

ヒートポンプ貯湯式給湯装置１は、湯水を貯湯する貯湯タンク１０と、貯湯タンク１０底部に接続される給水管１１と、貯湯タンク１０頂部に接続される出湯管１２と、貯湯タンク１０下部から取り出した湯水を加熱して貯湯タンク１０の上部に戻すようにして貯湯タンク１０内の湯水を積層状態に沸き上げるヒートポンプ式加熱手段１３と、貯湯タンク１０内の湯水の温度を検出する複数の貯湯温度センサ１４と、ヒートポンプ貯湯式給湯装置１の動作状況を表示すると共に、給湯温度等を設定するためのリモコン１５と、ヒートポンプ貯湯式給湯装置の動作を制御する制御手段１６とを備えて構成されている。 The heat pump hot water storage type hot water supply device 1 is taken out from a hot water storage tank 10 for storing hot water, a water supply pipe 11 connected to the bottom of the hot water storage tank 10, a hot water discharge pipe 12 connected to the top of the hot water storage tank 10, and a lower part of the hot water storage tank 10. Heat pump type heating means 13 for heating the hot water and returning the hot water in the hot water storage tank 10 to a stacked state so as to return to the upper part of the hot water storage tank 10, and a plurality of hot water temperature sensors for detecting the temperature of the hot water in the hot water storage tank 10. 14, the operation status of the heat pump hot water storage type hot water supply device 1 is displayed, the remote controller 15 for setting the hot water supply temperature and the like, and the control means 16 for controlling the operation of the heat pump hot water storage type hot water supply device are provided. .

制御手段１６には、過去の給湯負荷実績や外気温度、給水温度等に応じてヒートポンプ式加熱手段１３で沸き上げる湯水の沸き上げ目標温度を決定する沸き上げ目標温度決定手段１７と、電力料金単価の安い深夜時間帯などの特定の時間帯において沸き上げ目標温度で貯湯タンクの全量を沸き上げるようヒートポンプ式加熱手段１３を制御する沸き上げ制御手段１８と、過去の給湯負荷実績から翌日の給湯予測量を算出する給湯量予測手段１９と、給湯量予測手段１９で予測された給湯予測量を貯湯タンク１０内に沸き上げるのに必要な沸き上げ時間を算出し、これから特定時間帯の長さを減じて特定時間帯外で追加の沸き上げ必要な時間（追加沸き上げ時間）を算出する沸き上げ時間算出手段２０と、が備えられている。 The control means 16 includes a boiling target temperature determining means 17 for determining a boiling water target temperature to be heated by the heat pump heating means 13 according to past hot water supply load results, outside air temperature, feed water temperature, etc. A heating control means 18 for controlling the heat pump heating means 13 so as to boil the entire amount of the hot water storage tank at a boiling target temperature in a specific time zone such as a midnight time zone where the price is low, and prediction of hot water supply for the next day from past hot water supply load results The hot water supply amount prediction means 19 for calculating the amount of water, the boiling time required for boiling the hot water supply prediction amount predicted by the hot water supply amount prediction means 19 into the hot water storage tank 10 is calculated, and the length of the specific time zone is calculated from this. A boiling time calculating means 20 for calculating a time required for additional boiling outside the specific time zone (additional boiling time) is provided.

また、制御手段１６には、太陽光発電装置２を並設しているか否かをリモコン１５の特定操作に応じて設定する太陽光設定手段２１と、太陽光設定手段２１にて太陽光発電装置２が並設されていることが設定されている場合に、沸き上げ目標温度決定手段１７が決定した沸き上げ目標温度を太陽光発電装置２が並設されていない場合に比べて所定温度高い温度に補正する沸き上げ目標温度補正手段２２とが備えられている。 In addition, the control means 16 includes a solar light setting means 21 for setting whether or not the solar power generation apparatus 2 is arranged in parallel according to a specific operation of the remote controller 15, and the solar power generation apparatus using the solar light setting means 21. When it is set that 2 are arranged in parallel, the boiling target temperature determined by the boiling target temperature determining means 17 is a temperature higher by a predetermined temperature than the case where the photovoltaic power generation device 2 is not arranged in parallel. And a boiling target temperature correcting means 22 for correcting to the above.

ここで、太陽光設定手段２１は、エネルギー管理装置８からの発電不能である旨の出力を受けて設定を太陽光発電装置２が並設されていない設定に切り替え、その後、エネルギー管理装置８からの発電可能である旨の出力を受けると設定を太陽光発電装置２が併設されている設定に切り替えるようにしており、積雪や故障により発電不能である場合や、消費電力が多くて余剰電力がまとまった時間安定して発生しない実績がある場合に、太陽光発電装置２が並設されていない設定に切り替えることで、特定時間帯における沸き上げ時の沸き上げ目標温度の無駄な上昇を抑制して、ヒートポンプ貯湯式給湯機１の加熱効率および保温効率の低下を抑制するようにしている。 Here, the sunlight setting means 21 receives an output indicating that power generation is not possible from the energy management device 8 and switches the setting to a setting in which the solar power generation device 2 is not arranged in parallel. When the output indicating that the power generation is possible is switched to the setting where the solar power generation device 2 is installed, the case where the power generation is not possible due to snow or failure, or the power consumption is excessive and the surplus power When there is a track record that does not occur stably for a long time, switching to a setting in which the photovoltaic power generation devices 2 are not arranged in parallel suppresses an unnecessary increase in the boiling target temperature during boiling in a specific time zone. Thus, a decrease in the heating efficiency and the heat retention efficiency of the heat pump hot water storage type water heater 1 is suppressed.

この沸き上げ目標温度補正手段２２が補正する所定温度は、太陽光発電装置２が設置されている場合に、余剰電力によって昼間の沸き上げが一定時間行える程度の水量を貯湯タンク１０の底部に確保できるように決定されるもので、ここでは予め定められた一定温度（ここでは５℃）としている。 The predetermined temperature to be corrected by the boiling target temperature correcting means 22 is secured at the bottom of the hot water storage tank 10 so that when the photovoltaic power generation apparatus 2 is installed, the amount of water that can be heated for a certain period of time by surplus power is maintained. It is determined so that it can be performed, and here, it is set to a predetermined constant temperature (here, 5 ° C.).

そして、沸き上げ制御手段１８は、太陽光設定手段２１に太陽光発電装置２が設置されていない設定がなされていると、沸き上げ目標温度決定手段１７が決定した沸き上げ目標温度で貯湯タンク１０の全量を特定の時間帯において沸き上げるようにしている。 Then, when the setting is made such that the solar power generation device 2 is not installed in the solar light setting unit 21, the boiling control unit 18 uses the hot water storage tank 10 at the boiling target temperature determined by the boiling target temperature determination unit 17. The whole amount of water is boiled in a specific time zone.

特定の時間帯以外の時間帯（昼間時間帯）においては、給湯によって貯湯タンク１０の底部が低温の水に置換されると、沸き上げ時間算出手段２０が算出した追加沸き上げ時間があると追加の沸き上げを行うと共に、追加沸き上げ時間から追加の沸き上げを行った時間を減算して、追加沸き上げ時間が０になるまで繰り返し追加沸き上げを行うようにしている。 In a time zone other than a specific time zone (daytime time zone), if the bottom of the hot water storage tank 10 is replaced with low-temperature water by hot water supply, an additional boiling time calculated by the boiling time calculation means 20 is added. The additional boiling is repeated until the additional boiling time becomes zero by subtracting the additional boiling time from the additional boiling time.

一方、沸き上げ制御手段１８は、太陽光設定手段２１に太陽光発電装置２が設置されている設定がなされていると、沸き上げ目標温度決定手段１７が決定した沸き上げ目標温度で貯湯タンク１０の全量を沸き上げたときの貯湯熱量を算出し、この貯湯熱量を沸き上げ目標温度補正手段２２で補正した沸き上げ目標温度で除して沸き上げ容量を算出し、沸き上げ目標温度補正手段２２で補正された沸き上げ目標温度で特定の時間帯において沸き上げを開始し、貯湯温度センサ１４によって算出された沸き上げ容量を沸き上げたことを検知すると、沸き上げを完了するようにしている。 On the other hand, when the setting is made such that the solar power generation device 2 is installed in the solar light setting means 21, the boiling control means 18 is the hot water storage tank 10 at the boiling target temperature determined by the boiling target temperature determination means 17. The amount of hot water stored when the entire amount of water is boiled is calculated, the amount of stored hot water is divided by the target boiling temperature corrected by the target boiling temperature correction means 22, the boiling capacity is calculated, and the target boiling temperature correction means 22 is calculated. When boiling is started at a specific time zone at the boiling target temperature corrected in step S3 and it is detected that the boiling capacity calculated by the hot water storage temperature sensor 14 is heated, the boiling is completed.

そして、特定の時間帯以外の時間帯においては、エネルギー管理装置８が太陽光発電装置２の発電に余剰電力が生じていると判断すると、制御手段１６に対して沸き上げ要求を出力し、制御手段１６は沸き上げ要求を受けて、追加沸き上げ時間があると追加の沸き上げを行うと共に、追加沸き上げ時間から追加の沸き上げを行った時間を減算して、追加沸き上げ時間が０になるまで繰り返し追加沸き上げを行うようにしている。 When the energy management device 8 determines that surplus power is generated in the power generation of the solar power generation device 2 in a time zone other than the specific time zone, it outputs a boiling request to the control means 16 and performs control. The means 16 receives the boiling request and performs additional boiling when there is an additional boiling time, and subtracts the time of additional boiling from the additional boiling time so that the additional boiling time becomes zero. The additional boiling is repeated until it becomes.

ここで、追加沸き上げ時間が０の場合かつ貯湯温度センサ１４で検出する貯湯タンク１０内の残湯量が湯切れの恐れの少ない所定量以上であるときは、エネルギー管理装置８からの沸き上げ要求があっても追加沸き上げを行わないようにしているため、不要な追加沸き上げを行わないので、余剰電力を不要な温熱に変換することがなく、余剰電力を売電や蓄電等で有効に活用できる。 Here, when the additional boiling time is 0 and the amount of remaining hot water in the hot water storage tank 10 detected by the hot water storage temperature sensor 14 is equal to or more than a predetermined amount with a low risk of running out of hot water, a boiling request from the energy management device 8 is made. Since additional boiling is not performed even if there is any excess heat, unnecessary additional boiling is not performed, so surplus power is not converted into unnecessary heat, and surplus power is effectively sold or sold. Can be used.

また、追加沸き上げ時間が０の場合でも残湯量が湯切れの恐れのある所定量以下であるときは、エネルギー管理装置８からの沸き上げ要求があると追加沸き上げを行うようにしているため、追加沸き上げ時間がなくとも湯切れの可能性がある場合は追加沸き上げを行うので、余剰電力を有効に活用できる。 In addition, even when the additional boiling time is 0, when the remaining hot water amount is equal to or less than a predetermined amount at which hot water is likely to run out, additional boiling is performed when there is a boiling request from the energy management device 8. Even if there is no additional boiling time, if there is a possibility of running out of hot water, additional boiling is performed, so that surplus power can be used effectively.

このように、太陽光設定手段２１で太陽光発電装置２が並設されている設定がされていると、貯湯タンク１０の底部に低温の水を確保するように沸き上げるため、図２に示されるように特定時間帯の沸き上げ完了から給湯によってお湯を多量に使うまでの間にも、太陽光発電装置２の発電の余剰電力が発生した時には余剰電力を使って沸き上げ運転を行うことを可能としたので、特定時間帯以外の買電量を減少させることができ、さらには、この沸き上げ運転時に加熱する水は未加熱の水であるため、ヒートポンプ加熱手段１３における加熱効率を向上させることができる。 In this way, when the solar power generation device 2 is set to be arranged in parallel by the solar light setting means 21, in order to boil so as to secure low temperature water at the bottom of the hot water storage tank 10, it is shown in FIG. 2. As shown in the figure, when the surplus power generated by the solar power generation device 2 is generated from the completion of boiling in a specific time period until a large amount of hot water is used by the hot water supply, the heating operation is performed using the surplus power. Since it was made possible, the amount of electricity purchased outside the specified time zone can be reduced, and furthermore, since the water heated during the boiling operation is unheated water, the heating efficiency in the heat pump heating means 13 can be improved. Can do.

このとき沸き上げ目標温度補正手段２２では、予め定められた一定温度を沸き上げ目標温度決定手段１７で決定した沸き上げ目標温度に加算するようにして沸き上げ目標温度を補正して、太陽光発電がなかった場合の貯湯熱量と同じ熱量を特定時間帯に貯湯しているため、仮に太陽光発電の発電量がほとんどないような状況となった場合でも、電力料金単価の高い特定時間帯以外の買電量を増大させることがない。 At this time, the boiling target temperature correcting means 22 corrects the boiling target temperature by adding a predetermined constant temperature to the boiling target temperature determined by the boiling target temperature determining means 17, and thus photovoltaic power generation. Because the same amount of heat as the amount of stored hot water is stored in a specific time zone, even if there is almost no power generation of solar power generation, it is not in a specific time zone where the power unit price is high. There is no increase in the amount of electricity purchased.

なお、ここでは沸き上げ目標温度補正手段２２が補正する所定温度を５℃として説明したが、これは一例であって、算出される貯湯タンク１０の底部に確保される未加熱の水の容量が少ない等の状況に応じてもっと高い所定温度（例えば１０℃）を選択するようにしてもよい。 Here, the predetermined temperature corrected by the boiling target temperature correction means 22 is described as 5 ° C., but this is an example, and the capacity of unheated water secured at the bottom of the hot water storage tank 10 is calculated. A higher predetermined temperature (for example, 10 ° C.) may be selected in accordance with the situation such as low.

次に、本発明の別の実施形態を説明する。
ここでは、先の一実施形態の沸き上げ目標温度補正手段２２を変更したものであり、先の一実施形態と同一のものは同一の符号を付してその説明を省略する。 Next, another embodiment of the present invention will be described.
Here, the boiling target temperature correction means 22 of the previous embodiment is changed, and the same components as those of the previous embodiment are denoted by the same reference numerals and the description thereof is omitted.

この実施形態の沸き上げ目標温度補正手段２２は、貯湯タンク１０の容量から余剰電力で沸き上げる予め定められた確保水量（例えば５０Ｌ）を減算した容量で、沸き上げ目標温度決定手段１７で決定された沸き上げ目標温度で貯湯タンク１０を全量沸き上げた熱量を確保できる沸き上げ目標温度を算出して、太陽光設定手段２１にて太陽光発電装置２が並設されていることが設定されている場合には、沸き上げ目標温度決定手段１７が決定した沸き上げ目標温度を太陽光発電装置２が並設されていない場合に比べて高い温度に補正するようにしている。 The boiling target temperature correction means 22 of this embodiment has a capacity obtained by subtracting a predetermined reserved water volume (for example, 50 L) to be heated with surplus power from the capacity of the hot water storage tank 10, and is determined by the boiling target temperature determination means 17. The boiling target temperature that can secure the amount of heat generated by boiling the hot water storage tank 10 at the boiling target temperature is calculated, and the solar power generation device 2 is set in parallel by the solar light setting means 21. If so, the boiling target temperature determined by the boiling target temperature determining means 17 is corrected to a higher temperature than when the photovoltaic power generation device 2 is not provided in parallel.

そして、沸き上げ制御手段１８は、太陽光設定手段２１に太陽光発電装置２が設置されている設定がなされていると、沸き上げ目標温度補正手段２２で補正された沸き上げ目標温度で特定の時間帯において沸き上げを開始し、貯湯タンク１０の容量から確保水量を減算した容量を沸き上げたことを検知すると、沸き上げを完了するようにしている。 And if the setting which the solar power generation device 2 is installed in the sunlight setting means 21 is made, the boiling control means 18 will be specified with the boiling target temperature corrected by the boiling target temperature correction means 22. Boiling is started in the time zone, and when it is detected that the capacity obtained by subtracting the amount of reserved water from the capacity of the hot water storage tank 10 is heated, the boiling is completed.

このように、太陽光設定手段２１で太陽光発電装置２が並設されている設定がされていると、貯湯タンク１０の底部に低温の水を確保するように沸き上げるため、特定時間帯の沸き上げ完了から給湯によってお湯を多量に使うまでの間にも、太陽光発電装置２の発電の余剰電力が発生した時には余剰電力を使って沸き上げ運転を行うことを可能とし、さらには、この沸き上げ運転時に加熱する水は未加熱の水であるため、ヒートポンプ加熱手段１３における加熱効率を向上させることができる。 In this way, when the solar power generation device 2 is set to be arranged in parallel by the solar light setting means 21, the water is heated to secure low temperature water at the bottom of the hot water storage tank 10. It is possible to perform a boiling operation using surplus power when surplus power generated by the solar power generation device 2 is generated from the completion of boiling until a large amount of hot water is used by hot water supply. Since the water heated at the time of boiling operation is unheated water, the heating efficiency in the heat pump heating means 13 can be improved.

なお、本発明は上記の実施形態に限定されるものではなく、発明の要旨を変更しない範囲で改変可能なものである。 In addition, this invention is not limited to said embodiment, It can modify | change within the range which does not change the summary of invention.

１ヒートポンプ貯湯式給湯装置
２太陽光発電装置
８エネルギー管理装置
１０貯湯タンク
１３ヒートポンプ式加熱手段
１６制御手段
１７沸き上げ目標温度決定手段
１８沸き上げ制御手段
２１太陽光設定手段
２２沸き上げ目標温度補正手段 DESCRIPTION OF SYMBOLS 1 Heat pump hot water storage type hot water supply apparatus 2 Solar power generation device 8 Energy management apparatus 10 Hot water storage tank 13 Heat pump type heating means 16 Control means 17 Boiling target temperature determination means 18 Boiling control means 21 Solar light setting means 22 Boiling target temperature correction means

Claims

A hot water storage tank for storing hot water, a heat pump heating means for heating the hot water taken out from the lower part of the hot water tank and returning it to the upper part of the hot water tank, and boiling the hot water in the hot water storage tank, and the heat pump heating means. A boiling target temperature determining means for determining a boiling target temperature of hot water to be heated, and a boiling control means for controlling the heat pump heating means so as to boil the entire amount of the hot water storage tank at the boiling target temperature in a specific time zone. In the heat pump hot water storage type hot water supply apparatus equipped with, the solar power generation device for setting whether or not the solar power generation device is juxtaposed, and the solar power generation device is juxtaposed with the solar power setting unit Is set, the photovoltaic power generation apparatus is arranged in parallel with the boiling target temperature determined by the boiling target temperature determining means. A boiling target temperature correcting means for correcting the temperature to a higher temperature than in the case where the solar power generator is set in parallel with the solar power setting means. In addition, the same amount of stored hot water as the case where the entire amount of the hot water storage tank is boiled at the boiling target temperature before correction is set to the specific temperature at the boiling target temperature corrected to a high temperature by the boiling target temperature correction means . and boiled in the time period, the photovoltaic device is characterized in that so as to ensure the unheated water in the hot water storage tank bottom corresponds heat pump hot water storage type water heater.

The boiling control means monitors the power generation status and power consumption status in a building in which the solar power generation device and the heat pump hot water storage type hot water supply device are juxtaposed, and when the surplus power is generated, the heat pump hot water storage type hot water supply device Is communicably connected to an energy management device that instructs to start boiling, and in response to a boiling start instruction from the energy management device, unheated water below the hot water storage tank is boiled The heat pump hot water storage type hot water supply device for solar power generation according to claim 1.

The solar power generation heat pump hot water storage type hot water supply device according to claim 2, wherein the solar light setting means is capable of switching the setting state according to an instruction from the energy management device.

The boiling target temperature correcting means adds a predetermined temperature determined in advance to the boiling target temperature determined by the boiling target temperature determining means, which is used as a corrected boiling target temperature, and The control means calculates the boiling capacity by dividing the product of the boiling target temperature before correction and the capacity of the hot water storage tank by the boiling target temperature corrected by the boiling target temperature correction means. The photovoltaic power generation according to any one of claims 1 to 3, wherein unheated water is secured in the lower part of the hot water storage tank by stopping the boiling based on the boiling capacity. Heat pump hot water storage type water heater.

The boiling target temperature correcting means is a capacity obtained by subtracting a predetermined reserved water amount from the capacity of the hot water storage tank, and the hot water storage tank is fully heated at the boiling target temperature determined by the boiling target temperature determining means. The hot water storage tank is calculated by calculating a boiling target temperature that can secure a sufficient amount of heat, making this a target boiling temperature after correction, and stopping the boiling based on a capacity obtained by subtracting the reserved water volume from the capacity of the hot water storage tank. The unheated water is ensured in the lower part, The heat pump hot water storage type hot-water supply apparatus for solar power generation according to any one of claims 1 to 3.