JP2012163238A - Hot water supply apparatus and method for executing heating process of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water supply apparatus, to which electric power is supplied from a distribution board that distributes purchased power from an electric power company and generated power from a solar power generator to the equipment in a building, and which can suppress reduction in the quantity of generated power that can be supplied to the electric power company, and to provide a method for executing a heating process of the hot water supply apparatus.SOLUTION: In a storage type hot water supply apparatus, electric power is supplied from a distribution board that distributes purchased power from an electric power company and generated power from a solar power generator to the equipment in a building. The hot water supply apparatus includes: a heat pump unit that carries out a boiling operation of consuming the supplied power from the distribution board to heat water in a hot water storage tank; and a control device having an execution unit that controls the heat pump unit to carry out the boiling operation in a night power time zone. The execution unit has: a normal boiling operation as a first boiling operation, in which the finishing time of boiling is set to the end of the night power time zone; and an early boiling operation, in which the finishing time of boiling is set to time earlier than the finishing time of boiling in the normal boiling operation.

Description

  The present invention relates to a hot water supply apparatus and a heat treatment execution method for the hot water supply apparatus.

  2. Description of the Related Art Conventionally, there is a hot water supply apparatus that performs a heating process in which water in a hot water storage tank is heated by a heating means so that the temperature of the water in the hot water storage tank becomes a predetermined temperature or higher. Some hot water supply apparatuses actively perform heat treatment during nighttime power hours when electricity charges are low in order to keep the electricity charges used for heat treatment low.

  For example, a hot water storage type hot water supply device disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2002-195650) drives a compressor provided with a heat pump as a heating means at a high speed rotation number at night time, The entire amount of hot water in the tank is boiled (heated), and during the daytime, the compressor equipped with the heat pump is driven at a low speed to boil up the replenishment amount according to the amount of hot water in the tank. It has an operation mode that supports electric charges for each band.

  In addition, in a hot water supply device that is actively heated during the night power hours, it is heated at the end of the night power hours in order to reduce the heat dissipation of the water in the hot water storage tank that is heat treated during the night power hours. Many are configured to terminate the process.

  By the way, in a building where a solar power generation device is installed, power may be supplied to equipment in the building from a distribution board that receives the purchased power from the power company and the generated power from the solar power generation device. . In addition, when the power generated by the solar power generator is preferentially supplied to the equipment in the building, and the power generated by the solar power generator is insufficient, the shortage is the power purchased from the power company. Often supplemented. Furthermore, in recent years, in order to reduce the power generation load of an electric power company, a system for supplying the electric power generated by the solar power generator to the electric power company has been constructed.

  Here, when power is supplied from the distribution board as described above to the hot water supply device, the sunrise time when the power generation is started by the solar power generation device is earlier than the end time of the nighttime power time zone The generated electric power generated by the solar power generation device is used for the heat treatment in the night electric power hours. Then, the amount of generated power that can be supplied to the power company is reduced.

  Accordingly, an object of the present invention is to supply an electric power company with a hot water supply device in which electric power is supplied from a distribution board that distributes the purchased power from the electric power company and the generated electric power from the photovoltaic power generation device to the equipment in the building. An object of the present invention is to provide a hot water supply apparatus and a heat treatment execution method for the hot water supply apparatus that can suppress a decrease in the amount of generated electric power.

  A hot water supply apparatus according to a first aspect of the present invention is a hot water supply apparatus in which electric power is supplied from a distribution board that distributes purchased power from an electric power company and generated power from a solar power generator to equipment in a building. And a hot water storage tank, a heating means, and a control unit. The heating means consumes electric power supplied from the distribution board and performs heat treatment for heating the water in the hot water storage tank. The control unit includes a calculation unit, a calculation unit, and a heat treatment execution unit. The computing unit computes the amount of heat necessary for the heat treatment by the heating means. A calculation part calculates the heat processing time required for heat processing based on the calorie | heat amount calculated by the calculating part. The heat treatment execution unit causes the heating unit to perform the heat treatment during the nighttime power period including the early morning time period based on the heat treatment execution time calculated by the calculation unit. Moreover, the heat processing execution part has a normal heat processing pattern and an early heat processing pattern as a heat processing pattern. In the normal heat treatment pattern, the end time of the heat treatment is set near the end of the night electric power time zone. In the early heat treatment pattern, the heat treatment end time is set earlier than the heat treatment end time set in the normal heat treatment.

  In the hot water supply apparatus according to the first aspect of the present invention, the heat treatment execution unit is an early stage in which the end time of the heat treatment is set earlier than the end time of the heat treatment set in the normal heat treatment as the heat treatment pattern. It has a heat treatment pattern. For this reason, the heat treatment can be terminated at a time earlier than the end time of the nighttime power time zone by performing the heat treatment of the early heat treatment pattern. Therefore, when the sunrise time is earlier than the end time of the night power time period, the generated power generated by the photovoltaic power generator from the end time of the heat process to the end time of the night power time period is This can reduce the risk of being consumed for the purpose.

  As a result, a decrease in the amount of generated power that can be supplied to the power company can be suppressed.

  The hot water supply apparatus according to the second aspect of the present invention is the case where the heating process of the early heating process pattern is executed in the hot water supply apparatus of the first aspect, and from the end time of the heating process set in the early heating process pattern The power generated by the solar power generation device generated up to the end of the nighttime power period can be sold. For this reason, when the heat treatment of the early heat treatment pattern is executed, and when the sunrise time is earlier than the end time of the night electric power time zone, the heat treatment of the normal heat treatment pattern is executed and In comparison, more generated power can be sold to the power company.

  Thereby, the installation expense of a solar power generation device can be assisted.

  The hot water supply apparatus according to a third aspect of the present invention further includes a setting unit that sets whether or not the power generated by the solar power generation apparatus can be supplied to the heating means in the hot water supply apparatus according to the first aspect. In this hot water supply device, it is possible to set whether or not the power generated by the solar power generation device can be supplied to the heating means. Therefore, in this hot water supply device, even if a solar power generation device is installed or a solar power generation device is not installed, by changing the setting according to each case, The water heater itself can be shared.

  A hot water supply apparatus according to a fourth aspect of the present invention is the hot water supply apparatus according to any one of the first to third aspects, further comprising an outside air temperature detection unit that detects an outside air temperature. In addition, the heat treatment execution unit sets a start time and / or an end time in the heat treatment of the early heat treatment pattern based on the outside air temperature value detected by the outside air temperature detection unit. In this hot water supply apparatus, since the start time and / or end time in the heat treatment of the early heat treatment pattern can be set based on the outside air temperature, the start time and / or end time of the heat treatment according to the outside air temperature can be set. Can be set.

  The hot water supply device according to a fifth aspect of the present invention is the hot water supply device according to the fourth aspect, in which the control unit further includes a storage unit. The storage unit stores the start time and / or end time of the heat treatment set by the heat treatment execution unit. In this hot water supply apparatus, the start time and / or end time of the heat treatment can be held.

  A hot water supply apparatus according to a sixth aspect of the present invention is the hot water supply apparatus according to any one of the first to fifth aspects, wherein the control unit is connected to a network and provides correct time information and / or weather information via the network. get. In this water heater, since correct time information and / or weather information can be acquired, the start time and / or end time of the heat treatment in the early heat treatment pattern is set using the correct time information and / or weather information. can do.

  The heat processing execution method of the hot water supply apparatus according to the seventh aspect of the present invention is the power supplied from the distribution board that distributes the purchased power from the power company and the generated power from the solar power generator to the equipment in the building. Is a heat treatment execution method for a hot water supply device that performs a heat treatment for heating water in a hot water storage tank by a heating means during a nighttime power time period including an early time period, wherein the first step, the second step, , And a third step and a fourth step. In the first step, the end time of the heat treatment by the heating means is set to a time earlier than the end time of the night power time period. In the second step, the amount of heat necessary for the heat treatment by the heating means is calculated. In the third step, the heat treatment time necessary for the heat treatment is calculated based on the heat amount calculated in the second step. In the fourth step, the execution of the heating process by the heating means is started from a time that is back by the heating process time calculated in the third step from the end time of the heating process set in the first step.

  In the heat treatment execution method for the hot water supply apparatus according to the seventh aspect of the present invention, the end time of the heat treatment is set earlier than the end time of the nighttime power time zone. For this reason, when the sunrise time is earlier than the end time of the night power time zone, the generated power generated by the photovoltaic power generator from the end time of the heat treatment to the end time of the night power time zone is heated. The risk of being consumed for processing can be reduced.

  As a result, a decrease in the amount of generated power that can be supplied to the power company can be suppressed.

  In the hot water supply apparatus according to the first aspect of the present invention, it is possible to suppress a decrease in the amount of generated power that can be supplied to an electric power company.

  In the hot water supply apparatus according to the second aspect of the present invention, the facility cost of the photovoltaic power generation apparatus can be assisted.

  In the hot water supply apparatus according to the third aspect of the present invention, even if the solar power generation apparatus is installed or the solar power generation apparatus is not installed, the setting is made according to each case. By changing, the hot water supply device itself can be made common.

  In the hot water supply apparatus according to the fourth aspect of the present invention, the start time and / or end time of the heat treatment according to the outside air temperature can be set.

  In the hot water supply apparatus according to the fifth aspect of the present invention, the start time and / or end time of the heat treatment can be held.

  In the hot water supply apparatus according to the sixth aspect of the present invention, the start time and / or end time of the heat treatment in the early heat treatment pattern can be set using correct time information and / or weather information.

  In the heat treatment execution method for the hot water supply apparatus according to the seventh aspect of the present invention, a decrease in the amount of generated power that can be supplied to the electric power company can be suppressed.

The piping system figure of the hot water storage type hot-water supply apparatus which concerns on 1st Embodiment of this invention. The figure which shows the flow of the electric power supplied to a hot water storage type hot-water supply apparatus. The control block diagram of the control apparatus with which a hot water storage type hot-water supply apparatus is provided. The figure for demonstrating the start time and end time of normal boiling operation and early boiling operation. The figure which shows the correspondence of the temperature range of external air, and correction | amendment time. The flowchart which shows the control action at the time of the 1st boiling operation by a control apparatus.

  Hereinafter, a hot water storage type hot water supply apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration of a hot water storage type hot water supply device The hot water storage type hot water supply device 1 is water having a high temperature (hereinafter, higher than normal temperature water) boiled by heating means (heat pump unit 83 in this embodiment). Or hot water is stored in a hot water storage tank 11 provided in the hot water storage unit 10, and the stored hot water and water (hereinafter referred to as hot water) are supplied to the bathtub 18 according to the operation of the user. Or it supplies to supply parts (for example, a shower, a kitchen faucet, etc.) 16 other than bathtub 18.

  In addition, the hot water storage type hot water supply apparatus 1 in this embodiment is a hot water supply apparatus to which electric power is supplied from the distribution board 90 as shown in FIG. Specifically, various devices (for example, the compressor 87 and the boiling pump P1 of the heat pump unit 83) included in the hot water storage type hot water supply apparatus 1 are driven by consuming electric power supplied from the distribution board 90. Various operations including a boiling operation described later are executed. The distribution board 90 is for distributing the generated power generated by the solar power generation device 91 and the purchased power supplied from the power company 92 to each facility device in the building. The power conditioner 93 is for converting the DC power generated by the solar power generation device 91 into AC power.

  Here, the solar power generation device 91 starts power generation with sunrise and stops power generation with sunset. In addition, the generated power generated by the solar power generation device 91 is used as power for operating equipment installed in the building via the distribution board 90. Further, when the power generated by the solar power generation device 91 exceeds the power consumption (power consumption) by each equipment, the surplus power is sold to the power company 92 by a contract with the power company 92 or the like. (Sell electricity).

  Furthermore, the hot water storage type hot water supply apparatus 1 mainly includes a heat pump unit 83, a hot water storage unit 10, and a control device 70 (see FIGS. 1 and 3). Below, the various components with which the hot water storage type hot-water supply apparatus 1 is provided are demonstrated.

(2) Configuration of Heat Pump Unit The heat pump unit 83 functions by obtaining electric power as a heat source device for producing hot water. Specifically, the heat pump unit 83 includes a refrigerant circuit in which a refrigerant (for example, a carbon dioxide refrigerant) circulates. In the refrigerant circuit, the discharge side of the compressor 87 (see FIG. 3), the refrigerant side of the water heat exchanger, the high pressure side in the internal heat exchanger, the expansion valve, the air heat exchanger, and the low pressure in the internal heat exchanger. The devices are connected in this order, the suction side of the compressor 87, and the refrigerant is circulated therein.

  The internal heat exchanger exchanges heat between the refrigerant flowing through the high-pressure side pipe and the refrigerant flowing through the low-pressure side pipe. The water heat exchanger has a refrigerant pipe, and includes a high-temperature refrigerant discharged from the compressor 87 and flowing into the refrigerant pipe, and hot water flowing into the water pipe 25 from the hot water storage pipe 21 of the hot water storage unit 10 described later. Heat exchange between them. By the heat exchange in the water heat exchanger, the refrigerant passing through the refrigerant pipe is cooled, and the hot water passing through the water pipe 25 is heated, so that the temperature of hot water flowing into the hot water return pipe 22 of the hot water storage unit 10 to be described later is increased. Can be raised. As a result, hot water having a temperature higher than the temperature of the hot water flowing through the hot water outlet pipe 21 flows through the hot water return pipe 22 of the hot water storage unit 10.

  The heat pump unit 83 includes various sensors. Examples of the various sensors include sensors that detect temperature and pressure related to the refrigerant. Specifically, various sensors include a suction pressure sensor that detects a refrigerant pressure passing through the suction side of the compressor 87, a suction thermistor that detects a refrigerant temperature passing through the suction side of the compressor 87, and a discharge of the compressor 87. Discharge pressure sensor for detecting the refrigerant pressure passing through the side, discharge thermistor for detecting the refrigerant temperature passing through the discharge side of the compressor 87, and water heat for detecting the temperature of the refrigerant cooled by passing through the water heat exchanger There are an after-replacement refrigerant thermistor, an outside air thermistor T11 (see FIG. 3) for detecting the temperature of the outside air, an air heat exchange after-air exchange refrigerant thermistor for detecting the temperature of the refrigerant after being heated in the air heat exchanger, and the like. The sensor is provided so that the control device 70 can grasp the detected value.

(3) Configuration of Hot Water Storage Unit The hot water storage unit 10 is an apparatus that uses room temperature water supplied from the outside, such as city water, while heating and storing it with heat obtained from the heat pump unit 83. Further, as shown in FIG. 1, the hot water storage unit 10 includes a hot water storage tank 11, a hot water circulation circuit 20, a memorial heat exchanger 12, a memorial heat source circuit 30, a memorial heat utilization circuit 40, a hot water supply piping system 50, and A pipe joint 61 and the like are provided.

  The hot water storage unit 10 includes a casing 13 having a substantially rectangular parallelepiped shape. Further, the hot water storage tank 11, a part of the hot water circulation circuit 20, the recuperation heat exchanger 12, the recollection heat source circuit 30, the refurbishment utilization circuit 40, a part of the hot water supply piping system 50, and a part of the pipe joint 61. Is housed in the casing 13 (see FIG. 1).

(3-1) Hot water storage tank 11
The hot water storage tank 11 is a tank for storing hot water and water obtained by heat derived from the heat pump unit 83 in advance before being used by a user. The hot water storage tank 11 is formed in a cylindrical shape, for example, and can store hot water therein.

  Further, a water temperature thermistor T1 is disposed at the upper part of the hot water storage tank 11, and a plurality of remaining hot water amount thermistors T2 to T6 are disposed on the side surface of the hot water storage tank 11 at predetermined intervals across the top and bottom. Has been. The water temperature thermistor T1 and the remaining hot water amount thermistors T2 to T6 measure the temperature of hot water in the hot water storage tank 11. Further, the water temperature thermistor T1 and the remaining hot water amount thermistors T2 to T6 are respectively disposed at height positions corresponding to the remaining hot water amount of the hot water storage tank 11.

(3-2) Hot Water Circulation Circuit The hot water circulation circuit 20 is a circuit for transmitting heat obtained by the heat pump unit 83 to the hot water in the hot water storage tank 11, and includes a hot water outlet pipe 21, a hot water return pipe 22, It has a boiling pump P1, a three-way valve 60 for drainage, and a three-way valve 24 for boiling.

  The hot water storage pipe 21 is a pipe that connects the vicinity of the lower end portion of the hot water storage tank 11 and the upstream end portion of the water pipe 25 of the water heat exchanger located in the heat pump unit 83. The hot water storage pipe 21 is connected to the first hot water storage pipe 21a that connects the vicinity of the lower end of the hot water storage tank 11 and the three-way valve 60 for drainage, and the second that connects the three-way valve 60 for drainage and the heat pump circulation outlet 10a. It includes a hot water storage pipe 21b, and a third hot water storage pipe 21c that connects the heat pump circulation outlet 10a and the upstream end of the water pipe 25 of the water heat exchanger. A boiling pump P1 is provided in the middle of the second hot water storage pipe 21b. The boiling pump P1 is a pump for sending hot water from the drainage three-way valve 60 toward the heat pump circulation outlet 10a.

  The hot water storage return pipe 22 is a pipe that connects the downstream end of the water pipe 25 of the water heat exchanger to the vicinity of the upper end and the lower end of the hot water storage tank 11. The hot water storage return pipe 22 includes a first hot water storage return pipe 22a connecting the downstream end of the water pipe 25 of the water heat exchanger and the heat pump circulation return port 10b, a heat pump circulation return port 10b, a boiling three-way valve 24, and the like. The second hot water storage return pipe 22b for connecting the hot water, the third hot water return pipe 22c for connecting the boiling three way valve 24 and the upper end of the hot water storage tank 11, and the boiling three way valve 24 and the lower end of the hot water storage tank 11 are connected. And a fourth hot water storage return pipe 22d.

  The boiling three-way valve 24 is an electric valve whose opening degree is adjusted by an electric motor. The boiling three-way valve 24 adjusts the opening degree of the valve body under the control of the control device 70, so that the hot water flowing from the first hot water storage return pipe 22 a side to the second hot water storage return pipe 22 b side is transferred to the third hot water storage hot water. It flows into the return pipe 22c and flows out into the hot water storage tank 11 from the upper end of the hot water storage tank 11, or flows into the fourth hot water storage return pipe 22d and flows out from the lower end of the hot water storage tank 11 into the hot water storage tank 11.

  In the hot water circulation circuit 20, the boiling pump P <b> 1 is driven by the control of the control device 70, so that the hot water having a low temperature existing in the hot water in the hot water storage tank 11 flows out to the hot water outlet pipe 21. The temperature is raised by passing through the water pipe 25 of the water heat exchanger, and returned to the vicinity of the upper end of the hot water storage tank 11 or the vicinity of the lower end of the hot water storage tank 11 via the hot water return pipe 22. Thereby, the temperature of the hot water in the hot water storage tank 11 can be made comparatively high.

  The three-way valve 60 for drainage is a manual valve in which the opening degree of the valve body is adjusted by a user operating an operation unit (not shown). In the drainage three-way valve 60, the state of the valve body is adjusted so that the hot water flowing from the first hot water storage pipe 21a flows out to the second hot water storage pipe 21b and the first hot water storage pipe 21a. The hot water flowing from the side is switched to the state of flowing out to the discharge pipe 63 side. Hot water that has flowed out from the first hot water storage pipe 21a side to the discharge pipe 63 side is discharged out of the hot water storage unit 10 through the drain port 62. The drainage three-way valve 60 is normally set in a state in which hot water flowing from the first hot water storage pipe 21a side flows out to the second hot water storage pipe 21b side.

(3-3) Remembrance Heat Exchanger Remembrance heat exchanger 12 includes heat source pipe 12a through which hot water in hot water storage tank 11 circulates, and utilization pipe through which hot water or water circulated in bathtub 18 outside casing 13 circulates. 12b. In the memorial heat exchanger 12, the temperature of hot water or water flowing through the use pipe 12b is increased by causing heat exchange between hot water flowing through the heat source pipe 12a and hot water or water flowing through the use pipe 12b. Can do.

(3-4) Remembrance heat source circuit The recuperation heat source circuit 30 uses the temperature of hot water or water stored in the bathtub 18 outside the casing 13 and the heat of hot water stored in the hot water storage tank 11. Then, it is a circuit on the heat source supply side for further raising. The memorial heat source circuit 30 mainly includes a heat source forward pipe 31, a heat source return pipe 32, and a heat source pump P3.

  The heat source forward pipe 31 connects the vicinity of the upper end portion of the hot water storage tank 11 and the upstream end portion of the heat source pipe 12 a in the tracking heat exchanger 12. Further, a check valve B1 for preventing a back flow of hot water flowing from the hot water storage tank 11 side is disposed in the heat source forward pipe 31. The check valve B1 is disposed between the hot water storage tank 11 of the heat source forward pipe 31 and the branch point N1. The heat source return pipe 32 connects the downstream end of the heat source pipe 12 a in the tracking heat exchanger 12 and the vicinity of the lower end of the hot water storage tank 11. The heat source pump P <b> 3 is disposed in the middle of the heat source return pipe 32.

  In the remedy heat source circuit 30, the heat source pump P <b> 3 is driven by the control of the control device 70, so that the hot water existing in the upper part of the hot water in the hot water storage tank 11 flows out to the heat source forward pipe 31. The temperature is lowered by passing through the heat source pipe 12 a in the soot heat exchanger 12, and returned to the vicinity of the lower end of the hot water storage tank 11 through the heat source return pipe 32.

  In addition, the remedy heat source circuit 30 includes a first drain pipe 34 for guiding high-temperature expanded water generated during the boiling operation to the drain port 62. The first drain pipe 34 is branched and connected to the branch point N1 of the heat source forward pipe 31 and is connected to the pipe joint 61. The first drain pipe 34 is provided with a negative pressure operated relief valve 34a. When the water pressure in the hot water storage tank 11 is less than a predetermined water pressure, the negative pressure operation type relief valve 34 a closes the valve body, and the hot water in the hot water storage tank 11 passes through the first drain pipe 34 and is drained. It is forbidden to be discharged out of hot water storage unit 10 from 62. On the other hand, when the water pressure in the hot water storage tank 11 is equal to or higher than a predetermined water pressure, the valve body is opened, and hot water (expanded water) in the hot water storage tank 11 passes through the first drain pipe 34 and the hot water storage unit 62. 10 is discharged outside.

(3-5) Remembrance Utilization Circuit The remembrance utilization circuit 40 is a circuit for obtaining the heat of the hot water stored in the hot water storage tank 11 via the recollection heat source circuit 30. The memorial use circuit 40 mainly includes a use forward pipe 41, a use return pipe 42, a use pump P2, external pipes 43 and 45, and a bathtub connection adapter 44.

  One end of the use outlet pipe 41 is connected to the external pipe 43 via the full circulation return port 10c. In addition, the other end of the use pipe 41 is connected to the upstream end of the use pipe 12 b in the tracking heat exchanger 12. Further, the use pipe 41 is provided with a bath thermistor T7 for detecting the temperature of the passing hot water or water. Furthermore, the usage pump P2 is provided in the middle of the usage outlet pipe 41.

  One end of the use return pipe 42 is connected to the external pipe 45 through the full circulation outlet 10d. The other end of the utilization return pipe 42 is connected to the downstream end of the utilization pipe 12 b in the tracking heat exchanger 12.

  The external pipe 43 connects the use pipe 41 and the bathtub connection adapter 44. The external pipe 45 connects the use return pipe 42 and the bathtub connection adapter 44. Moreover, the bathtub connection adapter 44 is arrange | positioned in the bathtub 18, and makes hot water flow out in the bathtub 18, or takes in hot water or water from the bathtub 18. FIG. The external pipes 43 and 45 and the bathtub connection adapter 44 are disposed outside the casing 13 as shown in FIG.

  In the memorial use circuit 40, the use pump P2 is driven by the control of the control device 70, so that the hot water or water in the bathtub 18 flows out from the external pipe 43 side to the use pipe 41 side via the bathtub connection adapter 44. The temperature is raised by passing through the use pipe 12b in the remnant heat exchanger 12 and returned to the bathtub 18 through the use return pipe 42 and the external pipe 45. Thereby, the temperature of the hot water or water of the bathtub 18 can be raised, and additional cooking can be performed.

(3-6) Hot-water supply piping system The hot-water supply piping system 50 is a path for using hot water stored in the hot water storage tank 11 while receiving supply of water from an external city water or the like. A hot water outlet pipe 52, a supply pipe 53, a hot water supply mixing valve 54, and a hot water beam mixing valve 55 are provided.

  The water supply pipe 51 is a pipe through which water supplied from outside city water or the like flows, and includes a first water supply pipe 51a, a second water supply pipe 51b, and a third water supply pipe 51c.

  The first water supply pipe 51 a connects the external water supply pipe 17 through which water supplied from a water source outside the hot water storage unit 10 flows and the hot water supply mixing valve 54. The external water supply pipe 17 and the first water supply pipe 51a are connected via the water supply connection port 10e. The first water supply pipe 51a guides normal temperature water supplied from an external water source to the hot water supply mixing valve 54 via the branch points N2 and N3. The first water supply pipe 51a has a strainer with a check valve between the water supply connection port 10e and the branch point N2, and a pressure reducing valve for reducing the water pressure of the water flowing in from the water supply connection port 10e to a predetermined water pressure. R is disposed. The strainer with a check valve includes a strainer S for removing dust contained in water flowing in from the water supply connection port 10e side, and a check valve B2 for preventing reverse flow of water flowing in from the water supply connection port 10e side. Including. Further, a water temperature thermistor T8 that detects the temperature of the water flowing through the first water supply pipe 51a is disposed in the vicinity of the branch point N2 in the first water supply pipe 51a. The first water supply pipe 51a is provided with a check valve B3 between the hot water mixing valve 54 and the branch point N3 for preventing the reverse flow of water flowing from the branch point N3 side.

  The second water supply pipe 51b is branched and connected to the branch point N3 of the first water supply pipe 51a, and connects the first water supply pipe 51a and the hot water beam mixing valve 55. The second water supply pipe 51b guides normal temperature water supplied from an external water source to the hot water mixing valve 55 via the branch points N2 and N3 of the first water supply pipe 51a.

  The third water supply pipe 51c is branched and connected to the branch point N2 of the first water supply pipe 51a, and connects the first water supply pipe 51a and the lower end portion of the hot water storage tank 11. The third water supply pipe 51c guides normal temperature water supplied from an external water source to the vicinity of the lower end of the hot water storage tank 11 through the branch point N2 of the first water supply pipe 51a. The third water supply pipe 51c is provided with a check valve B4 for preventing the backflow of water flowing from the branch point N2 side. The water flowing into the first water supply pipe 51a from the external water supply pipe 17 flows through the third water supply pipe 51c via the branch point N2 and is supplied to the hot water storage tank 11 due to the water pressure. As a result, the hot water storage tank 11 is always kept full.

  The hot water discharge pipe 52 has a first hot water discharge pipe 52 a for supplying hot water in the hot water storage tank 11 to the supply unit 16 that is a supply destination other than the bathtub 18, and a first hot water pipe for supplying hot water in the hot water storage tank 11 to the bathtub 18. 2 hot water discharge pipes 52b.

  The first hot water discharge pipe 52 a connects the upper end portion of the hot water storage tank 11 and the hot water supply mixing valve 54. Further, of the hot water stored in the hot water storage tank 11, hot water having a relatively high temperature that is present near the upper end flows through the first hot water discharge pipe 52 a. The first hot water discharge pipe 52a is provided with a check valve B5 for preventing a back flow of hot water flowing from the hot water storage tank 11 side.

  The second hot water outlet pipe 52b is branched and connected to the branch point N4 of the heat source forward pipe 31, and connects the heat source forward pipe 31 and the hot water mixing valve 55. The second outlet pipe 52b is configured to pass hot water present in the vicinity of the upper end of hot water stored in the hot water storage tank 11 through a part of the heat source forward pipe 31 to a hot water mixing valve 55. Lead to.

  The supply pipe 53 is a pipe through which hot water mixed with normal temperature water flowing through the water supply pipe 51 and hot hot water flowing from the vicinity of the upper end of the hot water storage tank 11 through the hot water discharge pipe 52. Note that hot water having a temperature between the temperature (normal temperature) of the water flowing through the first water supply pipe 51 a and the temperature of hot water existing near the upper end of the hot water storage tank 11 flows in the supply pipe 53. The supply pipe 53 includes a first supply pipe 53 a connected to the hot water mixing valve 54 and a second supply pipe 53 b connected to the hot water mixing valve 55.

  The end of the first supply pipe 53a opposite to the end connected to the hot water supply mixing valve 54 is connected to the external pipe 99 through the hot water supply connection port 10f. The external pipe 99 is connected to the supply unit 16, and the hot water flowing through the first supply pipe 53a flows to the supply unit 16 side. The first supply pipe 53a is provided with a hot water supply amount sensor FLS1 that detects the amount of hot water flowing inside, and a hot water supply thermistor T9 that detects the temperature of hot water flowing through the first supply pipe 53a.

  The end of the second supply pipe 53b opposite to the end connected to the hot water mixing valve 55 is connected to the branch point N5 of the utilization return pipe. In other words, the second supply pipe 53 b bypasses the heat source forward pipe 31 of the tracking heat source circuit 30 and the use return pipe 42 of the tracking use circuit 40.

  The second supply pipe 53b is provided with a hot water quantity sensor FLS2 and a hot water thermistor T10. The hot water volume sensor FLS2 detects the amount of hot water flowing through the second supply pipe 53b. The hot water thermistor T10 is for detecting the temperature of the hot water flowing through the second supply pipe 53b. Furthermore, a hot water solenoid valve SV included in the composite water valve and two check valves B6 and B7 are disposed in the second supply pipe 53b. The hot water solenoid valve SV adjusts the amount of hot water flowing into the use return pipe 42 by adjusting the opening of the valve body by an electric motor. The check valves B6 and B7 are arranged so as to sandwich the hot water volume sensor FLS2. The check valves B6 and B7 prevent backflow of hot water flowing through the second supply pipe 53b toward the hot water mixing valve 55 or backflow of hot water or water from the bathtub 18.

  A second drain pipe 53c for guiding hot water flowing through the second supply pipe 53b to the drain port 62 is branched and connected to the branch point N6 of the second supply pipe 53b. In the present embodiment, the branch point N6 is located between the check valve B6 and the hot water volume sensor FLS2. Further, the second drain pipe 53 c is connected to the pipe joint 61. Furthermore, the second drain pipe 53c is provided with a drain valve 59 included in the composite water valve. The drain valve 59 discharges hot water accumulated in the second supply pipe 53b from the drain port 62 to the outside of the casing 13 through the second drain pipe 53c when the valve body is opened. The drain valve 59 is configured to be electrically operated, and the opening degree of the valve body is adjusted under the control of the control device 70.

  The hot water mixing valve 54 is an electric valve whose opening degree is adjusted by an electric motor. The hot water supply mixing valve 54 is adjusted by the control device 70 so that the opening of the valve body is adjusted, so that hot water from the first hot water discharge pipe 52a and water from the first water supply pipe 51a are mixed at a desired mixing ratio. The mixed hot and cold water is allowed to flow out to the supply unit 16 through the first supply pipe 53a and the external pipe 99.

  The hot water mixing valve 55 is an electric valve whose opening degree is adjusted by an electric motor. The hot water mixing valve 55 is adjusted by the control device 70 so that the opening degree of the valve body is adjusted, so that the hot water from the second hot water outlet pipe 52b and the water from the second water supply pipe 51b are mixed in a desired mixing ratio. The mixed hot water is discharged to the bathtub 18 through a part of the second supply pipe 53b and the utilization return pipe 42.

(3-7) Piping Joint The piping joint 61 is configured to collect all drainage generated in the hot water storage unit 10, and the collected waste water is discharged from one drain port 62 to the outside of the hot water storage unit 10. Specifically, the pipe joint 61 is a pipe joint to which the discharge pipe 63, the first drain pipe 34, and the second drain pipe 53c connected to the three-way drain valve 60 are connected. For this reason, the waste water flowing through the plurality of pipes is discharged from one drain port 62 to the outside of the hot water storage unit 10.

(4) Configuration of Control Device The control device 70 is based on the detection results of the thermistors T1 to T11 and the water volume sensors FLS1, FLS2, etc., and the valves 54, 55, 59, SV, the heat pump unit 83, and the pumps P1, P2. , P3 and other various devices are controlled. Moreover, the control apparatus 70 is connected to the controller 95 as shown in FIG. The controller 95 accepts user operations. The controller 95 has a setting unit 94. The setting unit 94 is for setting whether or not the user can supply the generated power generated by the solar power generation device 91 for various operations of the hot water storage type hot water supply device 1. For example, when the user has the solar power generation device 91 as a building facility, the setting unit 94 sets the power supply from the solar power generation device 91 to “present”. Further, for example, when the solar power generation device 91 is not provided as a building facility, the user sets the power supply from the solar power generation device 91 to “none” in the setting unit 94. The setting unit 94 transmits information regarding the solar power generation device 91 set by the user to the control device 70. In addition, the control device 70 includes a calculation unit 71, a calculation unit 72, an execution unit 73, and a storage unit 74.

  The execution unit 73 performs boiling operation (corresponding to a heating process) of boiling hot water in the hot water storage tank 11 with a water heat exchanger provided in the heat pump unit 83. Specifically, the execution unit 73 executes the boiling operation by driving the compressor 87 included in the heat pump unit 83 and the boiling pump P1 included in the hot water storage unit 10. As a result, the refrigerant circulates in the refrigerant circuit in the heat pump unit 83, and the hot water in the hot water storage unit 10 circulates in the hot water storage circuit 20 of the hot water storage unit 10, thereby raising the temperature of the hot water in the hot water storage unit 10. Is done.

  In addition, the boiling operation includes a first boiling operation in which heating is performed from 23:00, which is a nighttime power time zone including an early morning time zone, to 7:00 on the next day, and a 7:00 hour which is a daytime power hour zone. To 23:00, the second boiling operation is performed. In the hot water storage type hot water supply apparatus 1, boiling is performed in the first boiling operation so as to cover a predicted heat quantity to be described later. Further, in the second boiling operation, the boiling is performed so as to cover the amount of heat that is insufficient in the first boiling operation.

  Here, the night power hours are referred to as night power charges (also referred to as midnight power charges) in which the electric power charges used in the local power company 92 where the hot water storage hot water supply device 1 is installed are discounted compared to the daytime power hours. The daytime power time zone is a time zone other than the nighttime power time zone. For this reason, the time zone defined here differs depending on the time zone of the charge setting of the electric power company 92. In the present embodiment, the start time and the end time of the night power hours are stored in the storage unit 74 in advance, but the present invention is not limited to this, and the start time of the night power hours is determined by the user. The end time may be settable. Further, the early morning time zone is a time zone including the end time of the nighttime power time zone and the sunrise time, and in this embodiment, is a time zone from 5:00 to 7:00.

  The storage unit 74 stores temperature data detected by the thermistors T1 to T11, flow rate data detected by the water volume sensors FLS1, FLS2, and operation time data of the pumps P1, P2, P3. Is done.

  The computing unit 71 computes the amount of hot water used by the user (hereinafter referred to as the amount of heat used) every predetermined time based on the temperature data, flow rate data, and operation time data stored in the storage unit 74. . The amount of heat used calculated by the calculation unit 71 is stored in the storage unit 74 for several days. As a result, the amount of heat used for the past several days is accumulated in the storage unit 74 for each predetermined time period.

  In addition, the calculation unit 71 calculates the predicted use heat amount of the day for each time zone based on the heat use amount for several days stored in the storage unit 74. Furthermore, the calculation unit 71 calculates the required amount of stored hot water that needs to be stored in the hot water storage tank 11 at the time of the end of the night power hours based on the predicted amount of heat used, and the remaining hot water based on the amount of remaining hot water from the required amount of stored hot water. By reducing the amount of heat, the necessary amount of heat that needs to be heated during the nighttime power hours is calculated. The amount of remaining hot water is determined from the amount of remaining hot water at or above the usable temperature based on the detection results of the water temperature thermistor T1 and the remaining hot water thermistors T2 to T6. In this embodiment, the amount of heat required for hot water storage is calculated based on the amount of heat used in the past several days up to the previous day, but in addition to this, it is calculated taking into account the usage record during the night power hours. Also good.

  The calculation unit 72 calculates a heat treatment time necessary for boiling in the first boiling operation based on the necessary heat amount calculated by the calculation unit 71. Then, the execution unit 73 causes the heat pump unit 83 and the hot water storage unit 10 to perform boiling based on the heat treatment time calculated by the calculation unit 72. Moreover, the execution part 73 has normal boiling operation (equivalent to a normal heating process pattern) and early boiling operation (equivalent to an early heating process pattern) as 1st boiling operation (refer FIG. 4). In addition, the execution part 73 selects which operation of normal boiling operation or early boiling operation is performed based on the setting content of the setting part 94, and performs one of the selected driving | operations.

  In addition, the execution unit 73 sets the boiling end time at the end time of the nighttime power period in the normal boiling operation. For example, when the time of the end of the night power hours is 7:00, the execution unit 73 sets the boiling end time in the normal boiling operation to 7:00. Moreover, the execution part 73 sets the time which went back by the heat processing time calculated by the calculation part 72 from the set boiling end time of the normal boiling operation as the boiling start time in the normal boiling operation.

  Furthermore, the execution unit 73 sets the boiling end time at a time earlier than the boiling end time set in the normal boiling operation in the early boiling operation. For example, when the boiling end time in the normal boiling operation is set to 7:00, the execution unit 73 sets the boiling end time in the early boiling operation to the boiling end time in the normal boiling operation, that is, It is set to a time earlier than 7:00, which is the end time of the nighttime power period. Specifically, the execution unit 73 sets the boiling end time in the early boiling operation based on the boiling end time in the normal boiling operation and the detection result of the outside thermistor T11.

  Here, FIG. 5 is a table showing a correspondence relationship between the temperature range of the outside air detected by the outside air thermistor T <b> 11 and the correction time, and this table is stored in the storage unit 74.

  The execution unit 73 grasps in which temperature range of the table shown in FIG. 5 the outside air temperature detected by the outside air thermistor T11 in the early boiling operation and selects a correction time according to the grasped temperature range. And extract. Then, the execution unit 73 determines the boiling end time in the early boiling operation as a time that is back by the correction time from the end time of the nighttime power period. For example, when the temperature of the outside air detected by the outside air thermistor T11 is 27 ° C., the execution unit 73 grasps that the outside air temperature falls within the temperature range of the outside air temperature ≧ 25, and the correction time is “2”. Select and extract time. And the execution part 73 carries out the early boiling operation at the time (here 5:00) which went back by "2" time which is correction time from the end time (here 7:00) of a night electric power time slot | zone. Set to the boiling end time at.

  Furthermore, the execution part 73 sets the time which went back by the heat processing time calculated by the calculation part 72 from the boiling end time in the set early boiling operation to the boiling start time in the early boiling operation.

  As a result, as shown in FIG. 4, the heating processing time of the normal boiling operation and the early boiling operation are equal (both are 5 hours in FIG. 4), and the operation start time (boiling start time) of the early boiling operation and The operation end time (boiling end time) is earlier than the operation start time (boiling start time) and operation end time (boiling end time) of the normal boiling operation.

  In the present embodiment, the execution unit 73 sets the boiling end time in the early boiling operation based on the boiling end time in the normal boiling operation and the detection result of the outside air thermistor T11. Without being limited thereto, the execution unit 73 may set the boiling start time in the early boiling operation based on the boiling start time in the normal boiling operation and the detection result of the outside air thermistor T11. The boiling end time and start time in the early boiling operation may be set based on the boiling end time and start time in the boiling operation and the detection result of the outside air thermistor T11. In the present embodiment, the storage unit 74 stores the boiling end time and the boiling start time in the normal boiling operation and the early boiling operation, but is not limited thereto, and the boiling in the early boiling operation is not limited thereto. It is sufficient that at least one of the raising end time or the boiling start time is stored.

(5) Control operation at the time of the first boiling operation by the control device Hereinafter, the control operation at the time of the first boiling operation by the control device 70 will be described with reference to FIG.

  When the current time reaches the time at the beginning of the night power hours, the required heat amount is calculated by the calculation unit 71 (step S1, step S2). Next, the heat processing time is calculated by the calculation unit 72 based on the required heat amount (step S3). And if the heat processing time is calculated by the calculation part 72, the execution part 73 will set the time which went back only the heat processing time from the time of the end of a night electric power time slot | zone to the start time of a normal boiling operation (step) S4).

  And the execution part 73 judges whether the electric power supply from the solar power generation device 91 is set to "present" in the setting part 94 (step S5). In step S5, when it is determined that the power supply from the solar power generation device 91 is set to “present”, the execution unit 73 acquires the outside air temperature from the outside air thermistor T11, and based on the acquired outside air temperature. Then, the correction time is selected and extracted (step S6). Thereafter, in accordance with the extracted correction time, the boiling end time and the start time in the early boiling operation are set (step S7).

  When the current time reaches the boiling start time in the early boiling operation set in step S7, the execution unit 73 starts the early boiling operation in the first boiling operation (step S8, step S8). S9).

  In Step S5, when it is determined that the power supply from the solar power generation device 91 is not set to “present”, that is, in the setting unit 94, the power supply from the solar power generation device 91 is set to “No”. If set, the execution unit 73 starts the normal boiling operation of the first boiling operation when the current time reaches the boiling start time in the normal boiling operation set in step S4. (Step S8, Step S9).

(6) Features (6-1)
2. Description of the Related Art Conventionally, there is a hot water storage type hot water supply apparatus that performs boiling to heat the water in a hot water storage tank by a heating means so that the temperature of the water in the hot water storage tank becomes equal to or higher than a predetermined temperature. Moreover, in such a hot water storage type hot water supply apparatus, in order to suppress the electricity bill used for boiling cheaply, there is a thing which heat-processes actively in the night electric power time zone where an electricity bill is cheap.

  By the way, in a building where a solar power generation device is installed, power may be supplied to equipment in the building from a distribution board that receives the purchased power from the power company and the generated power from the solar power generation device. is there. In addition, when the power generated by the solar power generator is preferentially supplied to the equipment in the building, and the power generated by the solar power generator is insufficient, the shortage is the power purchased from the power company. Supplied supplemented. Furthermore, in recent years, in order to reduce the power generation load of an electric power company, a system for supplying the electric power generated by the solar power generator to the electric power company has been constructed.

  Here, when power is supplied from the distribution board as described above to the hot water supply device, the sunrise time when the power generation is started by the solar power generation device is earlier than the end time of the nighttime power time zone The generated electric power generated by the solar power generation device is used for the heat treatment in the night electric power hours. If it does so, the electric power generation amount by the solar power generation device which can be supplied to an electric power company will reduce.

  Therefore, in the present embodiment, as the first boiling operation, the normal boiling operation and the early boiling operation in which the boiling end time is set earlier than the boiling end time set in the normal boiling operation, ,have. For this reason, when the early boiling operation is performed, that is, when the boiling is performed by the early boiling operation, the boiling may be terminated at an earlier time than the end time of the night power period. it can. Therefore, as in the present embodiment, the hot water storage type in which power is supplied from the distribution board 90 that distributes the generated power from the solar power generation device 91 and the purchased power from the power company 92 to each facility device in the building. In the hot water supply device 1, when the sunrise time is earlier than the end time of the night power time zone, the generated power generated by the photovoltaic power generation device 91 from the end time of boiling to the end time of the night power time zone However, the possibility of being consumed for boiling up can be reduced. As a result, a decrease in the amount of generated power that can be supplied to the electric power company 92 can be suppressed, so that more generated electric power can be supplied to the electric power company 92 than when the normal boiling operation is performed. it can.

  Thereby, it is possible to reduce the power generation load of the power company 92 in the daytime power hours when the power demand for the power company 92 is maximum.

  In addition, since both the normal boiling operation and the early boiling operation are performed during the nighttime electric power hours, the electricity charge used for the boiling can be reduced and the running cost can be reduced.

(6-2)
In the present embodiment, when the boiling is performed by the early boiling operation, and when the sunrise time is earlier than the end time of the night power hours, the boiling by the normal boiling operation is performed. In comparison, more surplus power is generated. In the present embodiment, when the generated power of the solar power generation device 91 exceeds the usage amount, the surplus power can be sold to the power company 92 by contract with the power company 92 or the like. For this reason, when boiling is performed by early boiling operation and the sunrise time is earlier than the end time of the night power hours, it is compared with the case where boiling is performed by normal boiling operation. Thus, more generated power can be sold to the power company 92. As a result, the equipment cost of the solar power generation device 91 can be assisted.

(6-3)
In the present embodiment, the electric power supplied from the distribution board 90 is consumed (used) and various devices provided in the hot water storage type hot water supply device 1 are driven, so that the water in the hot water storage tank 11 is heated up. Done. In addition, the setting unit 94 can set whether or not the generated power generated by the solar power generation device 91 can be supplied for various operations of the hot water storage type hot water supply device 1. Furthermore, based on the setting contents of the setting unit 94, it is selected whether to perform normal boiling operation or early boiling operation, and any of the selected operations is performed. Here, when the setting unit 94 is set to “present”, the early boiling operation is executed, and when the setting unit 94 is set to “none”, the normal boiling operation is executed. The Therefore, even if the solar power generation device 91 is provided as the equipment as in the present embodiment, or unlike the present embodiment, the hot water storage type hot water supply device 1 is provided even if the solar power generation device is not provided as the equipment. Can be adopted. Thereby, even if it is the case where the solar power generation device 91 is installed, or the case where the solar power generation device 91 is not installed, the hot water storage type can be changed by changing the setting according to each case. The hot water supply device 1 itself can be shared.

(6-4)
In the present embodiment, the boiling end time in the early boiling operation is set based on the detection result of the outside air thermistor T11, and the boiling start time is set according to the set boiling end time. For this reason, the sunrise time can be estimated from the temperature of the outside air, and the boiling end time in the early boiling operation can be set at a time earlier than the estimated sunrise time. Moreover, since the sunrise time is estimated from the temperature of the outside air, it is possible to set the boiling end time according to the sunrise time.

(7) Modification (7-1) Modification A
In the above embodiment, the boiling end time in the early boiling operation is set based on the detection result of the outside air thermistor T11. Instead, when the control device is connected to the network, the boiling end time and / or the boiling start in the early boiling operation is performed using correct time information and weather information acquired via the network. A time may be set.

(7-2) Modification B
In the said embodiment, the boiling end time of the early boiling operation is set by the execution part 73 with which the control apparatus 70 is provided.

  Instead of this, the user may be able to set the boiling end time of the first boiling operation. For example, when the control device includes a setting unit for setting the boiling end time of the first boiling operation, the installation operator or the user can set the first time when installing the hot water storage type hot water supply device. The boiling end time of the 1-boiling operation may be set to a time earlier than the end time of the night power hours. As described above, when the control device includes a setting unit for setting the boiling end time of the first boiling operation, the end time of the first boiling operation executed in the night power hours is set as follows. It can be set in advance to a time earlier than the end time of the nighttime power time zone. As a result, when the required heat amount is calculated by the calculation unit and the heat treatment time is calculated by the calculation unit, the execution unit starts boiling when the heating process time is set back from the preset boiling end time. Can be set to time. Then, when the current time reaches the set boiling start time, the execution unit starts boiling, and when the sunrise time is earlier than the end time of the night power hours, the boiling end time Can reduce the possibility that the generated power generated by the solar power generation device from the time until the end of the nighttime power period is consumed for boiling.

  As a result, a decrease in the amount of generated power that can be supplied to the power company can be suppressed.

(7-3) Modification C
In the above-described embodiment, the boiling end time in the normal boiling operation is set by the execution unit 73 to the end time of the nighttime power period, but the present invention is not limited to this, and the boiling end in the normal boiling operation is completed. The time may be set to a time near the end of the night power period, that is, a time before or after the end of the night power period.

(7-4) Modification D
In the above embodiment, the correction time for the temperature of the outside air is determined in advance. Instead of this, the correction time may be correctable. For example, the correction time may be corrected based on the time when boiling is actually finished.

  In addition, bidirectional communication may be possible between the solar power generation device and the hot water storage type hot water supply device. In such a case, information on the power generation status and information on the operating status are exchanged between the photovoltaic power generation device and the hot water storage type hot water supply device, and various devices of the hot water storage type hot water supply device are controlled so that the running cost is reduced. May be.

(7-5) Modification E
In the above embodiment, when executing the first boiling operation, if the execution unit 73 determines that the power supply from the solar power generation device 91 is set to “present”, the outdoor thermistor T11 then The outside temperature is acquired, and the correction time is selected and extracted based on the acquired outside temperature.

  Instead of this, when the outside temperature data for each predetermined time is accumulated in the storage unit, the correction time may be selected based on the average temperature of the outside temperature for one day or multiple days.

  Moreover, about the time which the execution part 73 acquires outside temperature from the outside temperature thermistor T11, it is not limited to a night electric power time slot | zone, For example, you may acquire outside temperature at the time set arbitrarily.

  The present invention is an invention of a hot water supply device that can suppress a decrease in the amount of generated power that can be supplied to an electric power company, and a method for performing a heat treatment of the hot water supply device. It is effective to apply to a hot water supply apparatus in which power is supplied from a distribution board that distributes the generated power to the equipment in the building.

1 Hot water storage type hot water supply equipment
11 Hot water storage tank 70 Control device (control unit)
71 Calculation Unit 72 Calculation Unit 73 Execution Unit (Heating Process Execution Unit)
74 Memory 83 Heat pump unit (heating means)
90 Distribution board 91 Solar power generation device 92 Electric power company 94 Setting part T11 Outside air thermistor (outside air temperature detection part)

JP 2002-195650 A

Claims (7)

A hot water supply apparatus to which power is supplied from a distribution board (90) that distributes purchased power from an electric power company (92) and generated power from a solar power generation device (91) to equipment in a building,
A hot water storage tank (11),
A heating means (83) for performing heat treatment for consuming the electric power supplied from the distribution board and heating the water in the hot water storage tank;
A calculation unit (71) for calculating the amount of heat necessary for the heat treatment by the heating means, a calculation unit (72) for calculating a heat treatment time required for the heat treatment based on the heat amount calculated by the calculation unit, A control unit (70) having a heating process execution unit (73) that causes the heating means to perform a heating process in a nighttime power period including an early morning period based on the heating process time calculated by the calculation unit;
With
The heat treatment execution unit, as a heat treatment pattern,
A normal heat treatment pattern for setting an end time of the heat treatment near the end of the nighttime power period; and
An early heat treatment pattern for setting the heat treatment end time at a time earlier than the heat treatment end time set in the normal heat treatment;
Having
Hot water supply device (1). When the heat treatment of the early heat treatment pattern is performed, the sun generated between the heat treatment end time set in the early heat treatment pattern and the end time of the nighttime power time zone The power generated by the photovoltaic power generator can be sold.
The hot water supply apparatus according to claim 1. A setting unit (94) for setting whether or not the power generated by the solar power generation device can be supplied to the heating unit;
The hot water supply apparatus according to claim 1. It further includes an outside air temperature detection unit (T11) for detecting the outside air temperature,
The heat treatment execution unit sets a start time and / or an end time in the heat treatment of the early heat treatment pattern based on an outside air temperature value detected by the outside air temperature detection unit.
The hot-water supply apparatus of any one of Claim 1 to 3. The control unit further includes a storage unit (74) that stores a start time and / or an end time of the heat treatment set by the heat treatment execution unit.
The hot water supply apparatus according to claim 4. The control unit is connected to a network, and acquires correct time information and / or weather information via the network.
The hot water supply device according to any one of claims 1 to 5. Electricity purchased from the power company (92) and generated power from the photovoltaic power generation device (91) are distributed to the equipment in the building. A heating process execution method of the hot water supply device (1) for performing a heating process of heating the water in the hot water storage tank (11) by the heating means (83) during a nighttime electric power time period including:
A first step of setting the end time of the heat treatment by the heating means to a time earlier than the end time of the nighttime power period;
A second step of calculating the amount of heat required for the heat treatment by the heating means;
A third step of calculating a heat treatment time required for the heat treatment based on the heat quantity calculated in the second step;
A fourth step of starting the execution of the heat treatment by the heating means from a time that is back by the heat treatment time calculated in the third step from the end time of the heat treatment set in the first step;
A heat treatment execution method for a hot water supply apparatus comprising:

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