JP6377002B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply apparatus that heats hot water in a hot water storage tank using electric power supplied from a power conditioner to which electric power from solar power generation and commercial electric power are input.

  In a house equipped with a solar power generation device, when the generated power of the solar power generation device input to the power conditioner exceeds the total power consumption of the house, the surplus power surplus is sold to the power supplier. be able to. When the unit price of power sales is higher than the unit price of commercial power, the user can increase the amount of power sold by reducing the power consumption of the house when the solar power generator is generating power. I want to.

  Therefore, conventionally, in a hot water storage hot water supply apparatus equipped with a heat pump that operates by electric power supplied from a power conditioner and heats hot water in a hot water storage tank, the operation of the heat pump is performed while the photovoltaic power generator is generating power. A configuration has been proposed in which the amount of power sold is increased by prohibiting the power consumption and suppressing the power consumption of the house (see, for example, Patent Documents 1 to 3).

  The hot water storage type hot water supply apparatus described in Patent Literature 1 acquires meteorological information (including information on sunrise time and sunset time) via the Internet by using HEMS (Home Energy Management System). And the time which operates a heat pump and boils the water in a hot water storage tank is set avoiding the time slot | zone when solar power generation is possible.

  Moreover, the hot water storage type hot water supply apparatus described in Patent Document 2 predicts the sunrise time from the area information and date information, and from the sunrise time and the panel installation direction of the solar power generation device (4 directions or 8 directions from east, west, south, and north), The power generation start time of the solar power generation device 150 is predicted. And the target time which completes boiling the water in a hot water storage tank by operating a heat pump is determined based on the electric power generation start time of the solar power generation device 150. FIG.

  Moreover, the hot water storage type hot water supply apparatus described in Patent Literature 3 applies the date of the day to the correspondence map, and acquires the sunrise time and the sunset time of the day. And the boiling start time is set before the sunrise time so that the time for boiling the water in the hot water storage tank does not come after the sunrise time.

JP 2014-163641 A JP 2014-224660 A JP 2014-126300 A

  In the hot water storage type hot water supply apparatus described in Patent Documents 1 to 3, the amount of power sold is increased by avoiding the operation of the heat pump in the time zone in which power generation by the solar power generation apparatus is performed.

  However, in the hot water storage type hot water supply apparatus described in Patent Document 1, since weather information is acquired via the Internet by HEMS, there is an inconvenience that the apparatus configuration becomes complicated. Moreover, in the hot water storage type hot water supply apparatus described in Patent Documents 2 and 3, the installation location of the hot water storage type hot water supply apparatus, the direction of the photovoltaic power generation panel, and the like are input to correct the sunrise time and the sunset time. These inputs may not be able to accurately predict the power generation time zone of the solar power generation device.

  The present invention has been made in view of such a background, and predicts a power generation time zone of a solar power generation device with a simple configuration, and raises water in a hot water storage tank by electric energy. It is an object of the present invention to provide a hot water storage type hot water supply apparatus that can be performed while avoiding a power generation time zone.

The present invention has been made to achieve the above object, and is connected to a solar power generation device and a commercial power supply line and an electric load, and the generated power of the solar power generation device exceeds the power consumption of the electric load. When the surplus power generated by the solar power generator is sold, and the power generated by the solar power generator falls below the power consumed by the electrical load, the power supplied from the power conditioner that purchases the insufficient power A hot water storage type hot water supply device using
A hot water storage tank,
A water supply pipe connected to the hot water storage tank for supplying water to the hot water storage tank;
A tank heating unit that heats water in the hot water storage tank, the electric load being operated by power supplied from the power conditioner;
A hot water pipe connected to the hot water storage tank and supplied with hot water from the hot water storage tank,
An auxiliary heat source device that is provided in the middle of the hot water pipe and heats the water flowing through the hot water pipe using energy other than electric power from the power conditioner as a heat source,
A heating operation is performed to heat the water in the hot water storage tank by operating the tank heating section, and when the hot water storage tank has run out, the auxiliary heat source device is operated to An operation control unit to ensure the supply of hot water,
A timekeeping section that measures the date and time,
A storage unit holding data of a date correspondence map in which a date is associated with a sunrise time and a sunset time on the date;

And the 1st aspect of the hot water storage type hot-water supply apparatus of this invention is:
An initial time period that is an initial value of a boiling time limit that limits the execution of the boiling operation is set according to a user's input operation of the start time and end time of the initial time limit A time limit setting part,
When the initial time limit is set, the date of the day on which the initial time limit is set is applied to the date correspondence map, and the sunrise time and the day of the day on which the initial time limit is set An acquisition time is acquired, and a difference between a start time difference which is a difference between the acquired sunrise time and a start time of the initial time limit period, and a difference between the input time of the acquired date and an end time of the initial time limit period A time difference calculation unit for calculating a certain end time difference;
Applying the boiling restriction time zone on the execution date of the boiling operation to the date correspondence map by applying the date of the execution date to obtain the sunrise time and the sunset time of the execution date, and executing the execution The day restriction set by setting the time when the sunrise time of the day is shifted by the difference of the start time as the start time and the time when the sunset time of the day of the execution is shifted by the difference of the end time as the end time And a time zone setting unit.

  According to the present invention, the user can change the actual power generation of the solar power generation device, which varies depending on the installation state of the solar power generation device (the direction of the solar power generation panel, the presence or absence of buildings or terrain that block sunlight), and the like. According to the time zone, the start time and end time of the initial time limit zone can be set. In addition, when the initial time limit is set, the time difference calculation unit causes the start time which is a difference between the sunrise time on the day when the initial time limit is set and the start time of the initial time limit A time difference and the end time difference that is the difference between the sunset time of the day on which the initial time limit is set and the end time of the initial time limit are calculated.

  Then, the boiling time limit on the execution date of the boiling operation shifts the sunrise time on the current day (execution date of the boiling operation) by the start time difference by the current time limit time zone setting unit. The start time is set as the start time, and the time obtained by shifting the entry time of the current day by the end time difference is set as the end time.

  As described above, according to the present invention, the user can easily set the initial time limit period for any day, and thereafter, the sunrise time and the sunset time of the day when the boiling operation is performed can be performed. Is corrected by the start time difference and the end time difference reflecting the installation state of the photovoltaic power generation apparatus, and the boiling restriction time zone is set.

  Therefore, the boiling limit time zone is set in accordance with the time zone in which power generation by the photovoltaic power generator is actually performed, and the execution of the boiling operation in the boiling limit time zone is limited. Thus, it is possible to increase the amount of electric power sold by the solar power generation device.

  Here, in order to limit the execution of the boiling operation, in addition to prohibiting the execution of the boiling operation unconditionally, the auxiliary heat source machine (from the power conditioner such as the combustion heat of gas and oil burner) If the energy other than the electric power is used as a heating source) to supply hot water and sell the power generated by the solar power generator, the tank heating unit is operated to boil the water in the tank. The case where the execution of the boiling operation is prohibited is included only when the cost is more advantageous than the increase.

  Even if the boiling operation is prohibited, when the hot water storage tank runs out (the hot water in the hot water storage tank has run out), the auxiliary heat source device is operated by the operation control unit. Therefore, the hot water supply from the hot water supply pipe does not become impossible.

Next, the second aspect of the hot water storage type hot water supply apparatus of the present invention is:
The first correction time that is the correction time of the start time and the second correction time that is the correction time of the end time of the boiling restriction time zone that restricts the execution of the boiling operation are set according to the input operation of the user. A correction time setting section to be set;
The date of execution date of the boiling operation is applied to the date correspondence map to obtain the sunrise time and sunset time of the execution date, and the first correction time and the second correction time are not set When the execution date is set from the sunrise time to the sunset time in the boiling time limit on the execution date, the execution time is set when the first correction time and the second correction time are set. From the time when the sunrise time of the day is shifted by the first correction time to the time when the sunset time of the day of the execution day is shifted by the second correction time, the boiling restriction on the execution date It is provided with the day time limit time zone setting part set to a time zone.

  According to the present invention, when the correction time for the start time and end time of the boiling restriction time zone is not set, the day when the boiling operation is executed by the day restriction time zone setting unit. The period from the sunrise time to the sunset time (sunlight time zone) is set as the boiling restriction time zone. And according to the actual power generation time zone of the solar power generation device, which changes depending on the installation state of the solar power generation device, the user can correct the start time of the boiling limit time zone by the sunshine time zone. A certain first correction time and a second correction time that is a correction time of the end time can be set.

  When the first correction time and the second correction time are set, the sunrise time on the execution date of the boiling operation is shifted by the correction time of the start time by the day time limit setting unit. The time zone from the set time to the time when the sunset time is shifted by the correction time portion of the end time is set as the boiling limit time zone for the execution date.

  As described above, according to the present invention, a simple configuration in which the user sets the first correction time and the second correction time for the sunrise time and the sunset time of an arbitrary day, and thereafter The sunrise time and the sunset time of the day of execution of the boiling operation are corrected by the first correction time and the second correction time, respectively, reflecting the installation state of the solar power generation device, and the boiling time is corrected. A lifting time limit is set.

  Therefore, the boiling limit time zone is set in accordance with the time zone in which power generation by the photovoltaic power generator is actually performed, and the execution of the boiling operation in the boiling limit time zone is limited. Thus, it is possible to increase the amount of electric power sold by the solar power generation device.

The block diagram of a hot water storage type hot water supply apparatus. Explanatory drawing of the date corresponding | compatible map which matched the date, the sunrise time, and the sunset time. The flowchart of the calculation process of a start time difference and an end time difference. The flowchart of the setting process of a boiling limit time slot | zone. Explanatory drawing of the electric power generation time zone of a solar power generation device. Explanatory drawing of a start time difference, an end time difference, and a boiling limit time slot | zone.

  An embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 1, a hot water storage type hot water supply apparatus 1 of the present embodiment includes a hot water storage unit 10, a heat pump unit 50 (corresponding to an electric load and a tank heating unit of the present invention), a gas heat source unit 80 (an auxiliary heat source of the present invention). And a controller 120 that controls the overall operation of the hot water storage type hot water supply apparatus 1.

  The hot water storage type hot water supply apparatus 1 is connected to the power conditioner 151 together with other electric loads such as the home appliance 170 via the switchboard 153, and operates using the power supplied from the power conditioner 151.

  The power conditioner 151 is connected to the photovoltaic power generation apparatus 150 and is connected to the commercial power supply line 160 via the power meter 152. The power conditioner 151 converts the generated power (DC power) output from the photovoltaic power generator 150 into AC power (for example, single-phase three-wire AC 100V / 200V) having the same specifications as commercial power, It supplies to electric loads, such as the hot water supply apparatus 1 and household appliances 170.

  The power conditioner 151 is connected to the power meter 152, and sells power to supply surplus power to the commercial power supply line 160 when the amount of power generated by the solar power generation device 150 exceeds the total power consumption of the electric load. In addition, when the amount of power generated by the solar power generation device 150 is less than the total power consumption of the electric load, the power is purchased to receive the insufficient power from the commercial power supply line 160.

  Note that the power selling / buying here does not necessarily mean only a financial balance, but supplying power from the power conditioner 151 to the commercial power supply line 160 is referred to as power selling. In addition, supplying power from the commercial power supply line 160 to the power conditioner 151 side is referred to as power purchase.

  Measurement data of the power generation amount PV of the solar power generation device 150 is output from the power conditioner 151 to the controller 120. In addition, the power meter 152 to the controller 120 measure data of the power supply amount Cd from the commercial power supply line 160 to the power conditioner 151 (indicating a power sale state when negative, and indicating a power purchase state when positive). Is output.

  A storage battery 155 is connected to the power conditioner 151. The power conditioner 151 charges the storage battery 155 with commercial power during the midnight hours when the electricity bill is cheaper than during the day, and converts the discharge power of the storage battery 155 into AC power with the same specifications as the commercial power during the day. Then, it is supplied to an electric load such as the hot water storage type hot water supply apparatus 1 and the home appliance 170.

  In this way, by supplying the discharge power of the storage battery 155 to the electric load, the amount consumed by the electric load among the power generated by the solar power generation device 150 during the day can be reduced. Electricity can be increased.

  In FIG. 1, one controller 120 is shown as the controller of the hot water storage type hot water supply apparatus 1, but the controller of the hot water storage unit 10, the controller of the heat pump unit 50, and the controller of the gas heat source unit 80 are individually provided. It is good also as a structure which controls the whole action | operation of the hot water storage type hot-water supply apparatus 1 by communication between.

  The hot water storage unit 10 includes a hot water storage tank 11, a water supply pipe 12, a hot water discharge pipe 13, and the like. The hot water storage tank 11 keeps hot water inside and stores the hot water, and tank temperature sensors 14 to 17 arranged at substantially equal intervals in the height direction and an upper part of the hot water storage tank 11 to supply the hot water pipe 13 from the hot water storage tank 11. A tank hot water temperature sensor 26 for detecting the temperature Th of the hot water is provided. A drain valve 18 is provided at the bottom of the hot water storage tank 11 and is opened by an operator's manual operation.

  One end of the water supply pipe 12 is connected to a water supply (not shown) via a water supply port 30, and the other end is connected to the lower part of the hot water storage tank 11 to supply water to the lower part of the hot water storage tank 11. The water supply pipe 12 allows water to flow only in the direction from the water supply pipe 12 to the hot water storage tank 11 by preventing the internal pressure of the hot water storage tank 11 from becoming excessive, and to supply water from the hot water storage tank 11. A first hot water side check valve 20 is provided to prevent outflow of hot water to the pipe 12 side.

  The water supply bypass pipe 34 branched from the water supply pipe 12 communicates with the hot water discharge pipe 13 at the connection point X via the hot water supply mixing valve 21, and hot water supplied from the hot water storage tank 11 to the hot water supply pipe 13 by the hot water supply mixing valve 21. And the mixing ratio of the water supplied from the feed water bypass pipe 34 to the hot water discharge pipe 13 is changed.

  The water supply bypass pipe 34 includes a water supply temperature sensor 22 that detects a temperature Tw of water supplied to the water supply bypass pipe 34, a water-side flow sensor 23 that detects a flow rate Fw of water flowing through the water supply bypass pipe 34, and a water supply A water-side check valve 24 is provided that allows water only in the direction from the bypass pipe 34 to the hot water discharge pipe 13 and prevents outflow of hot water from the hot water discharge pipe 13 to the water supply bypass pipe 34.

  The hot water discharge pipe 13 has one end connected to the hot water supply port 31 and the other end connected to the upper part of the hot water storage tank 11. Hot water stored in the upper part of the hot water storage tank 11 is supplied from a hot water outlet pipe 13 to a hot water tap (not shown) (kitchen, washroom, bathroom currant, shower, etc.) via a hot water outlet 31. A second hot water side check valve 25 that allows the hot water pipe 13 to pass water only in the direction from the hot water storage tank 11 to the hot water discharge pipe 13 and prevents the hot water from flowing into the hot water storage tank 11 side from the hot water storage pipe 11. A hot water flow rate sensor 27 for detecting the flow rate Fh of hot water supplied from the hot water storage tank 11 to the hot water discharge pipe 13 is provided.

  The gas heat source unit 80 is provided in the middle of the downstream side of the connection point X with the feed water bypass pipe 34 of the tap water pipe 13. The hot water storage unit 10 bypasses the gas heat source unit 80 and is downstream of the gas heat source unit 80. A hot water bypass pipe 33 that connects the hot water outlet pipe 13 to the upstream side and a hot water bypass valve 29 that opens and closes the hot water bypass pipe 33 are provided.

  A mixing temperature sensor 28 for detecting the temperature Tm of hot water supplied to the hot water supply pipe 13 through the hot water supply mixing valve 21 is provided between the hot water supply mixing valve 21 and the branch point Y of the hot water supply pipe 13 with the hot water supply bypass pipe 33. A hot water supply temperature sensor 32 that detects the temperature of the hot water discharged from the hot water supply port 31 is provided between the joining point Z of the hot water supply pipe 13 and the hot water supply bypass pipe 33 and the hot water supply port 31.

  Detection signals from the sensors provided in the hot water storage unit 10 are input to the controller 120. Further, the operation of the hot water supply mixing valve 21 and the hot water bypass valve 29 is controlled by a control signal output from the controller 120.

  Next, the heat pump unit 50 circulates the hot water in the hot water storage tank 11 through the tank circulation path 41 and heats it, and is installed outdoors. The heat pump unit 50 includes a heat pump 51 including an evaporator 53, a compressor 54, a heat pump heat exchanger 55 (condenser), and an expansion valve 56 connected by a heat pump circuit 52.

  The evaporator 53 exchanges heat between air (outside air) supplied by the rotation of the fan 60 and a heat medium (alternative chlorofluorocarbon (HFC) or other chlorofluorocarbon, carbon dioxide, etc.) flowing through the heat pump circuit 52. Do. The compressor 54 compresses the heat medium discharged from the evaporator 53 to high pressure and high temperature, and sends it to the heat pump heat exchanger 55. The expansion valve 56 releases the pressure of the heat medium pressurized by the compressor 54.

  The defrost valve 61 is provided so as to bypass the expansion valve 56, and defrosts the evaporator 53 with a heat medium sent from the compressor 54. Heat medium temperature sensors 62, 63 for detecting the temperature of the heat medium circulating in the heat pump circuit 52 are provided upstream and downstream of the expansion valve 56 of the heat pump circuit 52 and upstream and downstream of the compressor 54. 64 and 65 are provided, respectively. Further, the evaporator 53 is provided with an ambient temperature sensor 67 that detects the temperature Tout of the air sucked into the evaporator 53.

  The heat pump heat exchanger 55 is connected to the tank circulation path 41, and circulates in the tank circulation path 41 by heat exchange between the heat medium that has been increased in pressure and temperature by the compressor 54 and hot water flowing in the tank circulation path 41. Heat the hot water. The tank circulation path 41 is provided with a tank circulation pump 66 for circulating hot water in the hot water storage tank 11 through the tank circulation path 41.

  Hot water stored in the lower part of the hot water storage tank 11 is guided to the tank circulation path 41 by the tank circulation pump 66, heated to a predetermined temperature (boiling temperature) by the heat pump heat exchanger 55, and returned to the upper part of the hot water storage tank 11. . Thereby, hot water of a predetermined temperature is sequentially stacked from the upper part of the hot water storage tank 11 and stored.

  Note that hot water temperature sensors 68 and 69 for detecting the temperature of hot water flowing in the tank circulation path 41 are provided on the upstream side and the downstream side of the heat pump heat exchanger 55 in the tank circulation path 41. The heat pump heat exchanger 55 is provided with an ambient temperature sensor 57 that detects the ambient temperature inside the heat pump heat exchanger 55.

  Detection signals from the sensors provided in the heat pump unit 50 are input to the controller 120. The operation of the compressor 54, the tank circulation pump 66, and the fan 60 is controlled by a control signal output from the controller 120.

  Next, the gas heat source unit 80 heats hot water flowing through the hot water discharge pipe 13, and includes a hot water supply burner 81 housed in the can body 87, a hot water supply heat exchanger 82 heated by the hot water supply burner 81, and the like. ing.

  In addition, a hot water filled pipe 100 communicating with the bathtub 105 is provided in the middle of the hot water discharge pipe 13. The hot water filling pipe 100 is provided with a hot water filling valve 103 that opens and closes the hot water filling pipe 100. A hot water filling operation for supplying hot water to the bathtub 105 is executed.

  Fuel gas is supplied to the hot water supply burner 81 from a gas supply pipe (not shown), and combustion air is supplied from a combustion fan (not shown). The controller 120 controls the amount of combustion of the hot water supply burner 81 by adjusting the flow rates of the fuel gas and the combustion air supplied to the hot water supply burner 81.

  In the present embodiment, the gas heat source unit 80 using the combustion energy of the fuel gas as the heating source is shown as the auxiliary heat source machine of the present invention, but energy other than the power supplied from the power conditioner 151 is used as the heat source. If it exists, you may use the auxiliary heat source machine which uses other types of energy, such as the combustion energy of petroleum, as a heat source.

  The hot water supply heat exchanger 82 is connected in the middle of the hot water discharge pipe 13, and heats the hot water flowing inside by the combustion heat of the hot water supply burner 81. The hot water discharge pipe 13 is provided with a water stop valve 93 and a water amount sensor 88 in order from the upstream side. The upstream side and the downstream side of the hot water supply heat exchanger 82 are connected by a heat source bypass pipe 89, and the heat source bypass pipe 89 is provided with a heat source bypass valve 90 for adjusting the opening degree of the heat source bypass pipe 89. Yes. A heat exchanger hot water temperature sensor 91 is provided in the vicinity of the outlet of the hot water supply heat exchanger 82 of the hot water discharge pipe 13, and a heat source hot water temperature sensor 92 is provided downstream of the location where the hot water supply pipe 13 is connected to the heat source bypass pipe 89. ing.

  With this configuration, when there is no hot water in the hot water storage tank 11 (hot water condition), water supplied from the water supply pipe 12 to the hot water discharge pipe 13 through the hot water storage tank 11 and the water supply bypass pipe 34 is supplied to the hot water supply heat exchanger 82. The hot water is heated to become hot water, mixed with water from the heat source bypass pipe 89, and hot water having a target hot water supply temperature is supplied from the hot water supply port 31.

  Detection signals from the sensors provided in the gas heat source unit 80 are input to the controller 120. Further, the operation of the hot water supply burner 81, the heat source bypass valve 90, and the hot water filling valve 103 is controlled by a control signal output from the controller 120.

  The controller 120 is an electronic circuit unit configured by a CPU, a memory, and the like (not shown). The CPU 120 executes the control program for the hot water storage type hot water supply device 1 held in the memory, so that the operation control unit 121 and the initial limit are controlled. It functions as a time zone setting unit 122, a time difference calculation unit 123, a current time limit time zone setting unit 124, and a correction time setting unit 125.

  In addition, the controller 120 counts a reference pulse signal output from a memory 126 (corresponding to a storage unit of the present invention) that holds data of a date correspondence map 127 (to be described later) and an oscillator (not shown). A timer unit 128 for calculating the date and time is provided.

  As shown in FIG. 2, the date correspondence map 127 is a map that associates a date with the sunrise time and sunset time of the date. In this embodiment, the date is divided into units of two weeks, and the sunrise time and Corresponds to the sunset time. Note that the sunrise time and the sunset time may be associated with each other according to other categories such as a day unit, a week unit, a month unit, and the like.

  The controller 120 is connected to the remote controller 140 via a communication cable 130. The remote controller 140 includes a display 141 for displaying the operation status of the hot water storage type hot water supply apparatus 1 and the setting of operation conditions, and a switch unit 142 provided with various switches. The user of the hot water storage type hot water supply apparatus 1 operates the switch unit 142 of the remote controller 140 to set the hot water supply temperature (target hot water supply temperature) from the hot water supply port 31 or the hot water supply temperature to the bathtub 105 in the hot water filling operation (target). Set the hot water filling temperature) and the hot water filling amount (target hot water filling amount).

  In addition, the user operates the switch unit 142 of the remote controller 140 to operate the heat pump unit 50 to restrict the execution of the boiling operation for boiling the water in the hot water storage tank 11 "boiling limit time period" Can be set as an initial value (initial time limit).

  In addition, as a mode to restrict the execution of the boiling operation, the user unconditionally prohibits the execution of the boiling operation in the “boiling limit time zone” and “boiling restriction”. It is possible to select and set the “economic mode” in which the prohibition of the boiling operation in the “time zone” is determined based on the unit price of power sale and the unit price of gas (unit price of fuel gas).

  In this case, the power selling unit price and the gas unit price may be stored in the memory in advance, or may be input by operating the remote controller 140. Further, in the “economic mode”, the operation control unit 121 sets the power selling price (boiling point) for the amount of power that is assumed to be consumed if the boiling operation is executed within the “boiling limit time period”. A comparison is made between the price of the electric power sold and the cost of gas and electric power (flow hot water supply cost) that are assumed to be consumed if hot water is supplied by the gas heat source unit 80 without performing the boiling operation.

  When the boiling power selling price is higher than the flow hot water supply cost cost, the operation control unit 121 prohibits the boiling operation in the “boiling limit time zone”. Thereby, the flow-type hot water supply by the gas heat source unit 80 which is advantageous in terms of cost can be performed, and the amount of power sold can be increased.

  Here, FIG. 5 shows the change in the power generation amount of the photovoltaic power generation device 150 on one day (from 0:00 to 24:00), with the vertical axis set to the power generation amount (PV) and the horizontal axis set to the time axis (t). It is shown. The amount of power generated by the photovoltaic power generator 150 is basically a time zone WG between the sunrise time SRT and the sunset time SST as shown by A, and gradually increases from the sunrise time SRT to around 12:00. And gradually decreases toward the sunset time SST.

  However, actually, as indicated by B, for example, the power generation of the solar power generation device 150 is caused by various factors such as the direction of the power generation panel of the solar power generation device 150, the presence of buildings that block sunlight, and the surrounding terrain. In many cases, the time zone shifts to the WR inside the WG.

  Here, the boiling operation is basically performed while avoiding the “boiling limit time zone” so that hot water used in the “boiling limit time zone” can be secured. In order to reduce the heat dissipation loss from the hot water storage tank 11, it is desirable to end the boiling operation immediately before the start time of the “boiling limit time zone”.

  Therefore, the “boiling limit time zone” is set according to the actual power generation time zone of the solar power generation device 150, and the water boiling operation of the hot water storage tank 11 is set to the “boiling limit time zone”. Ending immediately before the start time is effective in increasing the amount of power sold and suppressing heat dissipation loss of the hot water storage tank 11.

  Therefore, as described above, the time TST when the user actually starts power generation by the solar power generation device 150 (the time when sunlight starts to hit the power generation panel) and the time when power generation by the solar power generation device 150 ends. TET (the time when sunlight is no longer applied to the power generation panel) can be input.

  Then, the controller 120 uses the initial time limit setting unit 122, the time difference calculation unit 123, and the day time limit time zone setting unit 124 to set the “boiling limit time zone” to the actual sun based on TST and TET. The setting process is performed according to the power generation status of the photovoltaic power generation apparatus 150. Hereinafter, this process will be described with reference to the flowcharts shown in FIGS.

  FIG. 3 is a flowchart of processing performed by the initial time limit setting unit 122 and the time difference calculation unit 123. In STEP 1, the initial time limit setting unit 122 starts the start time (initial start time) TST and end time (initial end time) of the “boiling limit time zone” by the user's input operation of the switch unit 142 of the remote controller 140. ) When TET (disclosure time and end time desired by the user) is input, the process proceeds to STEP2.

  In STEP 2, the initial time limit setting unit 122 sets a time period from the initial start time TST to the initial end time TET as an initial time limit time period TWR.

  Subsequent STEP 3 to STEP 5 are processes by the time difference calculation unit 123. In STEP 3, the time difference calculation unit 123 recognizes the date (the current day) on which the initial start time TST and the initial end time TET are input from the time measurement data of the time measurement unit 128. In the next STEP 4, the time difference calculation unit 123 applies the date of the current day to the date correspondence map 127 and acquires the sunrise time SRT and the sunset time SST of the day.

  Then, in the next STEP5, the time difference calculation unit 123 calculates the start time difference ΔST and the end time difference ΔET by the following equations (1) and (2).

ΔST = TST−SRT (1)
ΔET = TET-SST (2)
However, ΔST: start time difference, TST: initial start time (start time of initial limited time zone TWR), SRT: sunrise time on the current day (the day on which TST and TET are set), ΔET: end time difference, TET: initial End time (end time of the initial time limit TWR), SST: time of entry on the day.

  Here, FIG. 6A shows an example in which the user inputs 7 o'clock as the initial start time TST of the initial time limit period TWR and 16:50 as the end time TET on July 16th. Is shown.

  In the example of FIG. 6A, the time difference calculation unit 123 calculates two hours obtained by subtracting 5 o'clock as the sunrise time from 7 o'clock as the initial start time as the start time difference ΔST. Also, the time difference calculation unit 123 calculates two hours obtained by subtracting the initial end time of 16:50 from the sunset time of 18:50 as the end time difference ΔET. In this case, an initial limit time zone TWR is set inside the time zone WG1 from the sunrise time to the sunset time.

  Next, the current day time limit setting unit 124 uses the start time difference ΔST and the end time difference ΔET calculated in this way to perform “boiling limit” on the day when power generation by the solar power generation device 150 is performed. The “time zone” is set by the processing according to the flowchart shown in FIG. The current day time limit setting unit 124 executes the processing according to the flowchart shown in FIG. 4 at, for example, 0:00 every day, and sets the “boiling limit time period” for that day.

  The current day time limit setting unit 124 recognizes the date of the current day from the time measurement data of the time measurement unit 128 in STEP 10 of FIG. In subsequent STEP 11, the current day time limit setting unit 124 applies the date of the current day to the date correspondence map 127 to acquire the sunrise time SRT and the daylighting time SST of the current day.

  In the next STEP 12, the current day time limit setting unit 124 determines whether a start time difference ΔST and an end time difference ΔET are set. Then, when the start time difference ΔST and the end time difference ΔET are set, the process proceeds to STEP 13, and the current time limit time zone setting unit 124 calculates “boiling limit time zone by the following formulas (3) and (4). ”Start time RST and end time RET are calculated, and the process proceeds to STEP 14 to end the process.

RST = SRT + ΔST (3)
RET = SST + ΔET (4)

  If the start time difference ΔST and the end time difference ΔET are not set, the process branches to STEP 20, and the current day time limit setting unit 124 sets the “boiling up” according to the following expressions (5) and (6). The start time RST and end time RET of the “limit time zone” are calculated, the process proceeds to STEP 14 and the process ends.

RST = SRT (5)
RET = SST (6)

  In this way, the current day time limit setting unit 124 corrects the sunrise time SRT of the current day with the start time difference ΔST (shifts by ΔST) to set the start time RST of the “boiling limit time period”, The initial time limit TWR set by the user is set by correcting the entry time SST of the day with the end time difference ΔET (shifting by ΔET) and setting the end time RET of the “boiling limit time zone”. The “boiling limit time zone” of the day can be set reflecting the installation status of the solar power generation device 150 shown.

  Here, FIG. 6B shows an example in which the “boiling limit time zone” WR2 for January 16 is set using the start time difference ΔST and the end time difference ΔET calculated in FIG. 6A. Is shown.

  The current day time limit setting unit 124 applies the date of January 16 that is the date of the current day in STEP 10 to the date correspondence map 127 by the process shown in the flowchart of FIG. Get 17:00, which is the time and sunset time. Then, the current day time limit setting unit 124 substitutes SRT = 7 o'clock, ΔST = 2 hours, SST = 17 o'clock, ΔET = 2 hours into the above formulas (3) and (4). 9 o'clock is calculated as the start time RST of the “rising limit time zone” and 15:00 is calculated as the end time RET of the “boiling limit time zone”.

  Thereby, the time zone WR2 between 9:00 and 15:00 on that day (January 16) is set as the “boiling limit time zone”.

[Another embodiment]
In the above embodiment, the initial time limit setting unit 122 sets the initial time limit time period TWR according to the input of the initial start time TST and the initial end time TET of the “boiling limit time period” by the user. Although the start time difference ΔST and the end time difference ΔET are set by the time difference calculation unit 123, the first time limit for correcting the sunrise time SRT is used instead of the initial time limit setting unit 122 and the time difference calculation unit 123. You may make it provide the correction time setting part 125 (refer FIG. 1) which sets correction | amendment time and the 2nd correction time for correct | amending the sunset time SST.

  The correction time setting unit 125 sets the first correction time ΔAM1 and the second correction time ΔAM2 according to the input operation of the switch unit 142 of the remote controller 140 by the user. Here, the first correction time ΔAM1 is a correction time for shifting the sunrise time SRT to set the start time of the boiling restriction time zone, and the second correction time ΔAM2 is a shift of the sunset time SST. This is the correction time for setting the end time of the boiling limit time zone.

  The user sets a time for shifting the sunrise time SRT of the day as the first correction time ΔAM1 in accordance with the actual power generation time zone of the photovoltaic power generation device 150 on any day, and shifts the arrival time SST of the day. The time to be set is set as the second correction time ΔAM2. After that, the current time limit time zone setting unit 124 replaces the start time difference ΔST in STEP 12 and STEP 13 in the flowchart of FIG. 4 described above with the first correction time ΔAM1, and also sets the end time difference ΔET to the second correction time ΔAM2. By performing the replacement process, the heating time limit for the day is set.

  DESCRIPTION OF SYMBOLS 1 ... Hot water storage type hot water supply apparatus, 10 ... Hot water storage unit, 11 ... Hot water storage tank, 12 ... Water supply pipe, 13 ... Hot water discharge pipe, 50 ... Heat pump unit, 80 ... Gas heat source unit, 120 ... Controller, 121 ... Operation control part, 122 ... initial time limit setting unit, 123 ... time difference calculation unit, 124 ... current day time limit setting unit, 125 ... correction time setting unit, 126 ... memory, 127 ... date correspondence map, 128 ... timekeeping unit, 150 ... sunlight Power generator 151, power conditioner.

Claims (2)

Connected to a solar power generation device and a commercial power supply line and an electric load, and when the generated power of the solar power generation device exceeds the power consumption of the electric load, the surplus power generated by the solar power generation device is sold. And when the generated power of the solar power generation device is less than the power consumption of the electric load, a hot water storage type hot water supply device that uses power supplied from a power conditioner that purchases insufficient power,
A hot water storage tank,
A water supply pipe connected to the hot water storage tank for supplying water to the hot water storage tank;
A tank heating unit that heats water in the hot water storage tank, the electric load being operated by power supplied from the power conditioner;
A hot water pipe connected to the hot water storage tank and supplied with hot water from the hot water storage tank,
An auxiliary heat source device that is provided in the middle of the hot water pipe and heats the water flowing through the hot water pipe using energy other than electric power from the power conditioner as a heat source,
A heating operation is performed to heat the water in the hot water storage tank by operating the tank heating section, and when the hot water storage tank has run out, the auxiliary heat source device is operated to An operation control unit to ensure the supply of hot water,
A timekeeping section that measures the date and time,
A storage unit that holds data of a date correspondence map in which a date is associated with a sunrise time and a sunset time on the date;
An initial time period that is an initial value of a boiling time limit that limits the execution of the boiling operation is set according to a user's input operation of the start time and end time of the initial time limit A time limit setting part,
When the initial time limit is set, the date of the day on which the initial time limit is set is applied to the date correspondence map, and the sunrise time and the day of the day on which the initial time limit is set An acquisition time is acquired, and a difference between a start time difference which is a difference between the acquired sunrise time and a start time of the initial time limit period, and a difference between the input time of the acquired date and an end time of the initial time limit period A time difference calculation unit for calculating a certain end time difference;
Applying the boiling restriction time zone on the execution date of the boiling operation to the date correspondence map by applying the date of the execution date to obtain the sunrise time and the sunset time of the execution date, and executing the execution The day restriction set by setting the time when the sunrise time of the day is shifted by the difference of the start time as the start time and the time when the sunset time of the day of the execution is shifted by the difference of the end time as the end time A hot water storage type hot water supply apparatus comprising a time zone setting unit. Connected to a solar power generation device and a commercial power supply line and an electric load, and when the generated power of the solar power generation device exceeds the power consumption of the electric load, the surplus power generated by the solar power generation device is sold. And when the generated power of the solar power generation device is less than the power consumption of the electric load, a hot water storage type hot water supply device that uses power supplied from a power conditioner that purchases insufficient power,
A hot water storage tank,
A water supply pipe connected to the hot water storage tank for supplying water to the hot water storage tank;
A tank heating unit that heats water in the hot water storage tank, the electric load being operated by power supplied from the power conditioner;
A hot water pipe connected to the hot water storage tank and supplied with hot water from the hot water storage tank,
An auxiliary heat source device that is provided in the middle of the hot water pipe and heats the water flowing through the hot water pipe using energy other than electric power from the power conditioner as a heat source,
A heating operation is performed to heat the water in the hot water storage tank by operating the tank heating section, and when the hot water storage tank has run out, the auxiliary heat source device is operated to An operation control unit to ensure the supply of hot water,
A timekeeping section that measures the date and time,
A storage unit that holds data of a date correspondence map in which a date is associated with a sunrise time and a sunset time on the date;
The first correction time that is the correction time of the start time and the second correction time that is the correction time of the end time of the boiling restriction time zone that restricts the execution of the boiling operation are set according to the input operation of the user. A correction time setting section to be set;
The date of execution date of the boiling operation is applied to the date correspondence map to obtain the sunrise time and sunset time of the execution date, and the first correction time and the second correction time are not set When the execution date is set from the sunrise time to the sunset time in the boiling time limit on the execution date, the execution time is set when the first correction time and the second correction time are set. From the time when the sunrise time of the day is shifted by the first correction time to the time when the sunset time of the day of the execution day is shifted by the second correction time, the boiling restriction on the execution date A hot water storage type hot water supply device comprising a day time limit time zone setting unit for setting a time zone.