JP4631967B2 - Power storage device - Google Patents

Description

  The present invention relates to a power storage and heat storage device that performs a power storage operation to a power storage unit and a heat storage operation of a heat storage unit with inexpensive power at midnight.

As a conventional technique, there is an energy storage type heat pump water heater disclosed in Patent Document 1 below. This energy storage type heat pump water heater includes a storage battery as a storage means, and a heat storage means having a heat pump cycle and a hot water storage tank. The power storage and the heat storage in the hot water storage tank by the operation of the heat pump cycle are performed.
JP-A-2005-164124

  However, in the above-mentioned conventional energy storage type heat pump water heater, since there is no time limit between the power storage operation to the power storage means and the heat storage operation of the heat storage means in the midnight hours, the power storage operation and the heat storage operation If these are performed at the same time, the power consumption increases dramatically. In order to cope with this increase in power consumption, there is a problem that the contract power capacity must be increased. Increasing the contract power capacity has disadvantages such as increasing the cost burden on the user.

  The present invention has been made in view of the above points, and while suppressing the increase in contract power capacity, the power storage operation to the power storage means and the heat storage of the heat storage means by the power in the midnight time zone, which is cheaper than other time zones. It aims at providing the electrical storage heat storage apparatus which can perform driving | running | working favorably.

In order to achieve the above object, in the invention described in claim 1,
Power storage means (1) for storing electric power;
A heat storage means (2, 3) for actuating the heating means (2) with electric power to store heat,
Control means (100) for controlling the power storage operation of the power storage means and the heat storage operation of the heat storage means,
A power storage heat storage device that performs power storage operation of the power storage means and heat storage operation of the heat storage means in the late-night time period when the power cost is lower than other time periods determined based on the power supply contract,
The control means
A heating operation start time calculating means (106) for calculating an operation start time of the heating means so as to store the necessary heat amount of the day determined based on the past results in the heat storage means by the end time of the midnight time zone;
By the heating operation start time calculated by the heating operation start time calculating means, the power storage state of the power storage means is in a predetermined state, and the required power storage amount for the day determined based on past performance is ended at the end of the midnight time zone Power storage operation start time calculating means (111) for calculating the operation start time of the power storage means so as to be stored in the power storage means by the time, and
The power storage means performs a power storage operation based on the power storage means operation start time calculated by the power storage operation start time calculation means, and the heating means operates based on the heating means operation start time calculated by the heating operation start time calculation means. It is characterized by doing.

  According to this, it is possible to finish the heat storage operation of the heat storage means so as to store the necessary heat amount of the day by the end time of the midnight time zone. In addition, the power storage state of the power storage means is in a predetermined state by the start time of the heat storage operation, and the power storage operation of the power storage means can be ended so that the necessary power storage amount for one day can be stored by the end time of the midnight time zone. .

  Therefore, the power storage operation to the power storage means and the heat storage operation of the heat storage means can be completed by the end time of the midnight time zone without greatly increasing the power consumption. In this way, it is possible to satisfactorily perform the power storage operation to the power storage means and the heat storage operation of the heat storage means with the power of the midnight time zone cheaper than other time zones while suppressing the increase in the contract power capacity. Become. Furthermore, the time zone for the heat storage operation and the time zone for the power storage operation can be performed in the time zone close to the end time with a relatively low power consumption load even in the midnight time zone, which contributes to leveling of power consumption. be able to.

  Further, the invention according to claim 2 is characterized in that the predetermined state of the power storage means is a state in which a required amount of power stored in a day determined based on past results is stored.

  According to this, the power storage operation of the power storage means can be ended so as to store the required power storage amount for one day by the start time of the heat storage means. Therefore, the power storage operation and the heat storage operation are not performed simultaneously. In this way, the power storage operation to the power storage means and the heat storage operation of the heat storage means can be satisfactorily performed with the power of the midnight time zone, which is cheaper than other time zones, while reliably suppressing the increase in the contract power capacity. Is possible.

  Further, the invention according to claim 3 is characterized in that the predetermined state of the power storage means is a state in which the stored power value is reduced to a predetermined value or less.

  According to this, the heat storage operation is not started unless the stored power value of the power storage means falls below a predetermined value. That is, the power storage operation and the heat storage operation are performed at the same time after the stored power value has decreased to a predetermined value or less. Therefore, it is possible to reliably perform the power storage operation to the power storage means and the heat storage operation of the heat storage means in the midnight time period while suppressing the increase in the contract power capacity and relatively shortening the total time of the power storage operation and the heat storage operation. Is possible.

In the invention according to claim 4,
The heating means can change the heating capacity,
The control means is characterized in that when the operation start time of the power storage means calculated by the power storage operation start time calculation means is before the start time of the midnight time zone, the control means is operated by increasing the heating capacity of the heating means. .

  According to this, when the calculated operation start time of the power storage means is before the start time of the midnight time zone, that is, when it is determined that the power storage operation and the heat storage operation cannot be completed only by the operation in the midnight time zone. The heat storage operation can be performed by increasing the heating capability of the heating means. Therefore, it is possible to reliably perform the power storage operation to the power storage means and the heat storage operation of the heat storage means in the midnight time zone.

  According to the fifth aspect of the present invention, when the operation start time of the power storage means calculated by the power storage operation start time calculation means is before the start time of the midnight time zone, the control means It is characterized in that the operating time of the heating means and the operating time of the power storage means in the midnight time zone are determined so as to minimize the cost.

  According to this, when the calculated operation start time of the power storage means is before the start time of the midnight time zone, that is, when it is determined that the power storage operation and the heat storage operation cannot be completed only by the operation in the midnight time zone. Can determine the allocation of the heat storage operation time and the power storage operation time in the midnight time zone so that the daily power consumption cost is minimized. Therefore, an increase in cost due to power consumption in a time zone other than the midnight time zone can be minimized.

In the invention according to claim 6,
The control means
When the power storage operation of the power storage device is prohibited by the difference between the operation start time of the power storage device calculated by the power storage operation start time calculation device and the start time of the midnight time zone, the power is supplied from other than the power storage device in a time zone other than the midnight time zone. By operating the heating means for a difference time between the first power cost increase due to the supply and the calculated operation start time of the power storage means and the start time of the midnight time zone in a time zone other than the midnight time zone Compare with the second power cost increase,
When the first power cost increase is greater than the second power cost increase, the power storage operation of the power storage means is prioritized in the midnight time zone, and the first power cost increase is greater than the second power cost increase. When it is small, it is characterized in that the heating means is prioritized in the midnight time zone.

  According to this, when it is judged that the power storage operation and the heat storage operation cannot be completed only by the operation at midnight, it is possible to easily suppress the increase in cost due to the consumption of power in the time zone other than the midnight time zone. Can do.

In the invention according to claim 7,
The heat storage means has a tank (31) for storing the heat medium heated by the heating means inside,
The control means is that the amount of heat stored in the tank by the end time of the midnight time zone is insufficient with respect to the required heat amount of the day, and the amount of heat that is insufficient for the required heat amount of the day is set in the time zone other than the midnight time zone. When re-operating and storing in the tank, store the heating medium heating temperature when operating the heating means during the midnight hours and storing it in the tank, and store the necessary amount of heat for one day in the tank during the midnight hours It is characterized by being made lower than the heating temperature of the heat medium when the above is assumed.

  According to this, the heat storage temperature of the heat medium stored in the tank in the midnight time zone can be reduced by subtracting the amount of heat that cannot be stored in the midnight time zone. Therefore, it is possible to improve the heat storage efficiency because the heating temperature of the heat medium by the heating means can be lowered by effectively utilizing the capacity of the tank.

  In the invention according to claim 8, when the heat storage suspension mode for the predetermined period is set, the control means includes the midnight time closest to the end point of the predetermined period in the midnight time zone within the predetermined period. In the midnight time zone excluding the belt, the operation of the heating means is prohibited, and the power storage operation of the power storage means is performed when the amount of power stored in the power storage means falls below a predetermined amount.

  According to this, it is possible to prevent the life of the power storage means from being reduced by repeating unnecessary power storage.

  In the invention according to claim 9, the control means starts the midnight time zone in the midnight time zone closest to the start time of the predetermined period among the midnight time zones within the predetermined period in which the heat storage suspension mode is set. It is characterized in that the power storage means performs the power storage operation so that the maximum power storage amount is obtained regardless of the power storage amount at the time.

  According to this, by setting the power storage means to the full power storage state in the first midnight time zone within the predetermined period in which the heat storage suspension mode is set, the power storage amount of the power storage means falls below the predetermined amount in the midnight time zone after the next time. Can be suppressed. Therefore, it is possible to reduce the number of times of electricity storage within a predetermined period in which the heat storage suspension mode is set, and it is possible to reliably prevent the life of the electricity storage means from being reduced.

  In the invention according to claim 10, the control means includes a midnight time in a midnight time zone that is second closest to the end time of the predetermined period among midnight time zones within the predetermined period in which the heat storage suspension mode is set. The power storage operation of the power storage means is performed so that the maximum power storage amount is obtained regardless of the power storage amount at the band start time.

  According to this, by setting the power storage means to the fully charged state in the midnight time zone second closest to the end time of the predetermined period in which the heat storage suspension mode is set, the power storage in the midnight time zone closest to the end time of the predetermined period is performed. It is possible to shorten the operation time. Therefore, the power storage operation and the heat storage operation in the midnight time zone closest to the end point of the predetermined period in which the heat storage suspension mode is set can be reliably performed in the midnight time zone.

  Further, in the invention according to claim 11, in the power storage device according to claim 9 or 10, when the control means sets the maximum power storage amount regardless of the power storage amount at the start time of midnight, It is characterized in that the power storage operation of the power storage means is performed from the start time to the end time of the midnight time zone.

  According to this, since the heat storage operation is prohibited when the maximum storage amount is set regardless of the storage amount at the start time of the midnight time zone, the storage speed to the power storage means can be reduced by using all the midnight time zone. . Therefore, it is possible to more reliably prevent a reduction in the life of the power storage means.

  In the invention according to claim 12, the control means stores the power storage means when the operation start time of the power storage means calculated by the power storage operation start time calculation means is a predetermined time or more after the start time of the midnight time zone. The power storage operation is performed at a reduced storage speed.

  According to this, when the power storage operation time has a certain time or more, the power storage speed to the power storage means can be reduced. Therefore, it is possible to reliably prevent a reduction in the life of the power storage means.

  In the invention according to claim 13, when the heat storage of the required amount of heat to the heat storage means and the storage of the required amount of storage of the day to the power storage means are not completed by the end time of the midnight time zone, It is characterized by comprising a display section (60) capable of displaying a shortage of time until the storage of the required amount of heat for the day and the storage of the required amount of stored for the day in the storage means.

  According to this, it is possible to notify the user of the time that is insufficient only in the midnight time zone in order to complete the power storage operation and the heat storage operation. Therefore, it is possible to appeal the necessity of energy saving to the user.

  Further, in the invention according to claim 14, when the storage of the required amount of heat to the heat storage means and the storage of the required amount of storage to the power storage means are not completed by the end time of the midnight time zone, the completion is completed. It is characterized by having a display unit capable of displaying an increase in power cost due to an increase in the amount of power used outside of the midnight time zone.

  According to this, it is possible to notify the user of the increase in power cost due to the failure to complete the power storage operation and the heat storage operation only in the midnight time zone. Therefore, the necessity of energy saving can be appealed to the user also by this.

  Further, in the invention described in claim 15, when the heat storage of the required amount of heat to the heat storage means and the storage of the required amount of storage of the day to the power storage means are not completed by the end time of the midnight time zone, It is characterized by having a display unit that can display the amount of heat of the difference between the amount of heat required for the day and the amount of heat required for storing the amount of heat stored in the heat storage means by the end of the midnight time period together with the required amount of storage for the day, or related information Yes.

  According to this, it is possible to notify the user of the amount of heat that could not be stored in the midnight time zone alone or related information on the display unit. Therefore, the necessity of energy saving can be appealed to the user also by this.

  In the invention of claim 16, the amount of heat stored in the heat storage means can be used as hot water supply water, and by the end of the midnight time zone together with the storage of the required heat amount of the day and the required storage amount of the day. The related information of the amount of heat that is the difference from the amount of heat that can be stored in the heat storage means is the capacity of hot water supply water.

  According to this, it is possible to notify the user of the amount of use reduction of hot water required for completing the storage of the required amount of storage for the day and the storage of the required amount of heat for the day at midnight on the display unit. . Therefore, it is possible to appeal the necessity of energy saving to the user.

  Further, in the invention according to claim 17, the heat storage means includes a tank that stores therein the heat medium heated by the heating means, a heating temperature setting means (63, 64) by the heat medium heating means stored in the tank, The related information of the difference between the amount of heat required for the day and the amount of heat that can be stored in the heat storage means by the end time of the midnight time zone together with the storage of the required amount of storage for the day is It is characterized by the heating temperature.

  According to this, it is possible to notify the user of the heating temperature of the heat medium necessary for completing the storage of the required amount of storage of the day and the storage of the required amount of heat of the day on the display unit at midnight. Therefore, it is possible to appeal the necessity of energy saving to the user and prompt the user to set the heating temperature to be lowered by the heating temperature setting means (63, 64).

  In the invention according to claim 18, the amount of power stored in the power storage means in the midnight time zone, or the power cost reduction amount due to the power storage in the power storage means in the midnight time zone is calculated as one midnight time zone or the cumulative amount thereof. A display unit capable of displaying at least one of the values is provided.

  According to this, it is possible to appeal to the user the merit of storing power in the midnight time zone by displaying on the display unit.

  In the invention according to claim 19, the heat storage means includes a tank that stores therein a heat medium heated by the heating means, and a casing (35) that houses the tank and the power storage means in the same space formed inside. ).

  According to this, the air in a housing | casing can be warmed with the calorie | heat amount radiated | emitted from a tank, and the electrical storage means accommodated in the same space of a housing | casing can be heated. Therefore, it is possible to adjust the temperature of the power storage means with a relatively simple configuration.

  In the invention according to claim 20, the power storage means is installed indoors.

  According to this, the installation environment temperature of the power storage means is relatively difficult to change indoors, and the temperature control of the power storage means can be easily performed.

  In the invention according to claim 21, the power storage means is disposed inside an air passage forming member that forms an air passage returning from the indoor air-conditioned space to the indoor heat exchanger of the air conditioner. It is a feature.

  Also by this, the installation environment temperature of the power storage means is unlikely to fluctuate inside the air passage forming member through which air from the air-conditioned space flows, and the temperature control of the power storage means can be easily performed.

In the invention according to claim 22,
The heating means includes an endothermic heat exchanger (21) for absorbing heat stored in the heat storage means from outside air, and an air blowing means (22) for blowing outside air to the endothermic heat exchanger,
An air guide path forming member (83) is provided which forms an air guide path for introducing air so that air blown by the air blowing means passes through at least the outer periphery of the power storage means.

  According to this, when the temperature of the power storage means rises due to the power storage operation, it is possible to cool the power storage means by blowing air regardless of whether the heat storage operation is performed by operating the air blowing means.

According to the invention of claim 23,
The heat storage means has a tank that stores the heat medium heated by the heating means from above,
A temperature adjusting heat exchanger (90) provided so as to be in contact with at least the outer peripheral surface of the power storage means;
And a circulation passage pipe (96) for forming a circulation passage in which the heat medium in the lower portion in the tank returns to the lower portion in the tank via the temperature adjusting heat exchanger. Yes.

  According to this, when the temperature of the power storage means rises due to the power storage operation, the power storage means is circulated in the circulation passage pipe through the relatively low-temperature heat medium in the lower part of the tank and circulated to the temperature adjustment heat exchanger. Can be cooled.

In the invention according to claim 24,
The heat storage means has a tank that stores the heat medium heated by the heating means from above,
A temperature adjusting heat exchanger provided so as to be in contact with at least the outer peripheral surface of the power storage means;
A circulation passage pipe that internally forms a circulation passage so that the heat medium in the lower portion in the tank returns to the lower portion in the tank via the temperature adjusting heat exchanger and the heating means. Yes.

  According to this, when the temperature of the power storage means rises due to the power storage operation, the power storage means is circulated in the circulation passage pipe through the relatively low-temperature heat medium in the lower part of the tank and circulated to the temperature adjustment heat exchanger. Can be cooled. In addition, when the temperature of the power storage means has dropped, the heat storage means is circulated through the circulation passage pipe while circulating the heat medium in the lower part of the tank through the temperature adjustment heat exchanger while operating the heating means. Can be heated.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

(First embodiment)
A first embodiment to which the present invention is applied will be described with reference to FIGS. FIG. 1 is a schematic diagram illustrating a schematic configuration of the power storage and heat storage device according to the first embodiment. Moreover, FIG. 2 is a flowchart which shows the electrical storage thermal storage control operation which the control means of an electrical storage thermal storage apparatus performs, and FIG. 3 is a time chart for demonstrating the operation example of an electrical storage thermal storage apparatus.

  The power storage heat storage device of this embodiment is mainly used for general household use, and includes a power storage unit 1 as a power storage unit having a secondary battery 10 that stores power, a heat pump unit 2 that is a heating unit, and power. And a heat storage means having a tank unit 3 that operates the heat pump unit 2 to store heat in a hot water storage tank 31 (corresponding to a tank).

  The power storage operation for storing power in the power storage unit 1 and the heat storage operation for storing heat in the hot water storage tank 31 of the heat storage means are controlled by the control means 100, and a power supply contract with a power supply source (electric power company). The power storage operation and heat storage of the power storage unit 1 using power in the midnight time zone (for example, 23:00 to 7:00) where the power cost is lower than other time zones (for example, morning and evening hours and daytime hours) determined based on The heat storage operation of the means can be performed.

  The heat storage means is a hot water supply terminal (hand-washing tap) directly to the kitchen, washroom, bathroom, etc., via the hot water supply pipe 33 with hot water supply water, which is a heat transfer fluid (heat medium) stored in the hot water storage tank 3 (equivalent to the tank) , Currants, showers, baths, etc.). It has a function of exchanging heat between hot water, which is a heat transfer fluid for heat storage stored in the hot water storage tank 3, and hot water supply water by a heat exchanger (not shown), and supplying the heated hot water supply water to a hot water supply terminal. Also good.

  As shown in FIG. 1, the heat storage means of the present embodiment heats hot water by exchanging heat between the high-temperature and high-pressure refrigerant and the low-temperature water that flows out from the lower part of the hot water storage tank 3 and is supplied via the heat pump inlet pipe 25. A heat pump unit 2 as a heating means, and a tank unit 3 in which hot water heated by the heat pump unit 2 is introduced through a heat pump hot water discharge pipe 26 and stored in the housing 35 from the top side is stored in a housing 35. I have.

  The heat pump unit 2 is configured such that at least a compressor, a heat storage heat exchanger (water refrigerant heat exchanger), an expansion valve, an evaporator (heat absorption heat exchanger), and other refrigeration cycle functional components are connected in a ring shape. Yes. The heat pump unit 2 constitutes a supercritical heat pump cycle in which, for example, carbon dioxide having a low critical temperature is used as a refrigerant, whereby the refrigerant pressure on the high pressure side becomes equal to or higher than the critical pressure of the refrigerant.

  When the heat pump cycle is constituted by a supercritical heat pump, hot water having a temperature higher than that of a general heat pump cycle, for example, about 85 ° C. to 90 ° C. can be stored in the hot water storage tank 31.

  The hot water storage tank 31 is a vertically long container that stores a heat transfer fluid for hot water supply, and is made of a metal excellent in corrosion resistance, for example, stainless steel. It can be kept warm over time. A water supply pipe 32 for supplying city water is connected to the bottom of the hot water storage tank 31 at the bottom of the hot water storage tank 31, and the supply water pressure applied to the hot water storage tank 31 is adjusted to the water supply pipe 32. A pressure reducing valve 34 is provided.

  In the tank unit 3, a hot water supply system control circuit 30 is provided that controls hot water storage in the hot water storage tank 31 and outputs an instruction signal to the heat pump control circuit 20 of the heat pump unit 2 to perform heat pump operation instruction control. The heat pump control circuit 20 is disposed in the heat pump unit 2 and controls the operation of the compressor and the circulation pump for the heat transfer fluid according to the instruction signal from the hot water supply system control circuit 30.

  In the casing 35 of the tank unit 3, the secondary battery 10 is accommodated above the hot water storage tank 31. The secondary battery 10 is placed on a partition plate portion installed in the housing 35. The partition plate portion is formed with a large number of through holes, and the storage space for the hot water storage tank 31 and the secondary battery are formed. 10 storage spaces communicate with each other.

  That is, the hot water storage tank 3 1 that stores the heat medium heated by the heat pump unit 2 and the secondary battery 10 are accommodated in the same space formed in the housing 35. Therefore, the air in the housing 35 is warmed by the amount of heat radiated from the hot water storage tank 31, and the secondary battery 10 stored in the same space of the housing 35 is heated. The temperature of the battery 10 can be adjusted.

  The secondary battery 10 is configured by one or a plurality of flat battery packs in which one or a plurality of unit batteries made of, for example, a lithium ion battery is sealed.

  The secondary battery 10 is maintained at a constant temperature by using the remaining heat (heat dissipation loss) of the hot water storage tank 31. For example, since the inside of the housing 35 is kept at around 40 ° C. even in low-temperature outside air, a temperature sensor (not shown, for example, as a battery temperature detecting means provided in the secondary battery 10 exceeds a predetermined temperature if necessary). If it is detected, the secondary battery 10 can be held at 20 ° C. to 40 ° C. only by operating the cooling fan 11.

  A power conditioner system (hereinafter, PCS) 4 that controls charging / discharging of the secondary battery 10 is installed upstream of the secondary battery 10 (on the left side in the figure, on the system power side). The PCS 4 includes a PCS control circuit 40, a charger 41, and a DC / AC inverter 42 therein.

  The charger 41 has an AC / DC converter function that converts AC to DC, and is a charger with an AC / DC converter function that controls a voltage necessary for storing (charging) the secondary battery 10. The DC / AC inverter 42 converts the DC power stored in the secondary battery 10 into AC power as necessary. Charging to the secondary battery 10 performed via the charger 41 and discharging from the secondary battery 10 performed via the DC / AC inverter 42 are controlled by the PCS control circuit 40.

  It can be said that the configuration including the secondary battery 10 and the charger 41 is a substantial power storage unit in the present embodiment. Further, the secondary battery 10 is a main part (main body part) of a substantial power storage unit in the present embodiment.

  In the upstream of the PCS 4 (on the left side in the figure, on the grid power side), the grid power of the power company is distributed and supplied to the PCS 4 and indoor devices, and the AC power output from the PCS 4 is distributed to the indoor devices. A board 5 is installed. The PCS 4 has a built-in reverse tide prevention function that does not return the stored power of the secondary battery 10 to the system power, and demand for electric power in the home (including a heat pump type water heater that includes the heat pump unit 2 and the tank unit 3). Only when there is, control is performed so that the stored power can be supplied to the home. With this configuration, the stored power can be supplied to other than the heat pump type hot water heater.

  The PCS control circuit 40, the water heater system control circuit 30, and the heat pump control circuit 20 can communicate with each other, and the communication line 7 is used between the PCS control circuit 40 and the water heater system control circuit 30. Mutual communication is possible between the water heater system control circuit 30 and the heat pump control circuit 20 by a power superimposition communication method using a power line.

  In the present embodiment, the hot water heater system control circuit 30 and the PCS control circuit 40 constitute the control means 100. The control means is not limited to the configuration composed of the water heater system control circuit 30 and the PCS control circuit 40. The control means may be configured by one integrated control circuit, or the control means may be configured by three or more control circuits. May be included.

  The PCS control circuit 40 can monitor the state of the secondary battery 10 via the communication line 7. Further, the water heater system control circuit 30 performs communication with the remote controller 6 as a remote control means capable of setting at least various conditions of the water heater and displaying the state of the water heater via the communication line 7. It is like that.

  Next, the boiling operation (heat storage operation of the heat storage means) of the hot water storage tank 3 and the charging operation of the secondary battery 10 (sequential operation of the power storage means) of the electricity storage heat storage device having the above configuration will be described. FIG. 2 is a flowchart showing a schematic control operation of the heating operation control and the charge control of the control means 100.

  As shown in FIG. 2, the control means 100 first determines whether or not the time has reached 23:00 (step 101). When it is determined that the time has reached 23:00, the amount of remaining hot water in the hot water storage tank 31 is calculated (step 102), and the actual value (for example, average amount of hot water used) of the amount of hot water used for a predetermined period in the past is calculated (step 103). ) And using these both, the required amount of heating heat in the midnight time zone is calculated (step 104). Then, based on the calculated required amount of heating heat, the required heating temperature by the heat pump unit 2 is calculated (step 105).

  When the required boiling temperature is calculated in step 105, the boiling start time for completing the heating of the required boiling heat amount by 7 o'clock which is the end time of the midnight time zone is calculated (step 106). In step 106, in the present embodiment, the heating operation for calculating the operation start time of the heating means so as to store the necessary heat amount for the day determined based on the past results in the heat storage means by the end time of the midnight time zone. It is a start time calculation means.

  When step 106 is executed, the control means 100 calculates the remaining power storage amount (remaining charge amount) of the secondary battery 10 (step 107), and uses the stored power amount (for example, average used stored power amount) in the past predetermined period. Is calculated (step 108), and the necessary charge amount in the midnight time zone is calculated using both of them (step 109). Based on the calculated required charge amount, the required charge time is calculated (step 110).

  When the required charging time is calculated in step 110, a charging start time for ending charging at the boiling start time calculated in step 106 is calculated (step 111). In the present embodiment, in the present embodiment, the required power storage amount for the day determined based on the past performance is stored in the power storage means by the operation start time of the heating means calculated by the heating operation start time calculation means. It is a power storage operation start time calculating means for calculating the operation start time of the means.

  After executing up to step 111, the control means 100 starts charging the secondary battery 10 at the time calculated in step 111 (step 112). When the boiling start time calculated in step 106 is reached, the secondary battery 10 is charged. 10 is stopped (step 113), a heat pump operation signal is output to the heat pump control circuit 20, and the operation of the heat pump unit 3 is started (step 114). At 7 o'clock, a heat pump stop signal is output to the heat pump control circuit 20 to stop the operation of the heat pump unit 2 (step 115).

  In addition, although the above-mentioned description was demonstrated as control operation of the control means 100, step 101-106, 114, 115 is performed by the water heater system control circuit 30, and step 101 and 107-113 are performed by the PCS control circuit 40. Can be. In that case, after executing step 101 in at least one of the steps, steps 102 to 106 and steps 107 to 110 can be executed in parallel. Then, before executing step 111, the calculation result of step 106 is developed (information transmission) from the water heater system control circuit 30 to the PCS control circuit 40 via the communication line 7.

  According to the control operation described above, the power storage device according to the present embodiment calculates the amount of heat required for boiling in the midnight time zone from the remaining heat amount data of the hot water storage tank 31 and the amount of hot water used by the user for a specific period. The operation start time of the heat pump water heater is determined so that the amount of heat can be secured at 7:00 am. This control method (ending operation at 7 o'clock) is often an indispensable requirement for a heat pump type water heater to be applied to a power discount system as a late-night heat storage device, but it can cope with this.

  Next, the necessary amount of electricity storage is calculated from the amount of remaining electricity of the secondary battery 10 and the amount of electricity stored during a specific period used by the user, and the time required for electricity storage is determined. And it is control-configured so that charge of a storage battery is started so that the electrical storage of the secondary battery 10 can be complete | finished before the operation start time of the said heat pump type water heater. In the present embodiment, the predetermined state of the power storage means referred to in the present invention is a state in which the power storage of the required power storage amount for one day determined based on the past results has been completed.

  According to the above-described configuration and operation, the control means 100 executes Step 106 shown in FIG. 2 and sets the required heat amount for one day determined based on the past results until the end time of the midnight time zone. The heat storage operation start time of the heat pump unit 2 is calculated so that the heat pump unit 2 can be stored in, and the operation start of the heat pump unit 2 is calculated by executing Step 111 and calculating the required amount of electricity stored in the day based on the past results in Step 106 The charging operation start time of the secondary battery 10 is calculated so as to be stored in the secondary battery 10 by the time. Then, the secondary battery 10 is charged from the charging operation start time to the heat storage operation start time, and the heat pump unit 2 is operated from the heat storage operation start time to the end time of the midnight time zone to store heat in the hot water storage tank 31.

  Therefore, as shown in the operation example in FIG. 3, the heat storage operation of the heat pump unit 2 can be ended so that the necessary heat amount of the day can be stored by the end time of the midnight time zone, and the power storage operation and the heat storage operation are performed simultaneously. In order to prevent this, the power storage operation to the secondary battery 10 can be terminated so as to store the necessary power storage amount for one day by the start time of the heat storage operation.

  Thereby, the storage operation to the secondary battery 10 and the heat storage operation to the hot water storage tank 31 by operating the heat pump unit 2 can be completed by the end time of the midnight time period without greatly increasing the power consumption. The power storage operation and the heat storage operation can be performed satisfactorily with the power of the midnight time zone, which is cheaper than other time zones, while suppressing the increase in the contract power capacity.

  In the present embodiment, the power storage operation is only stored in the secondary battery 10, but when there is an increase in the amount of power storage, for example, an increase in power storage devices due to the spread of electric vehicles or the like (increase in the capacity of the secondary battery). It is very effective to apply the present invention.

  In addition, the heat storage operation time zone and the power storage operation time zone can be performed in the time zone close to the end time with a relatively low power consumption load even in the midnight time zone, which contributes to leveling of power consumption. be able to.

  Regarding the late-night power storage in the secondary battery 10, the start time and the end time are not limited as long as they are within the midnight time zone. However, in order to increase the power consumption leveling effect and the carbon dioxide emission reduction effect, the start time is as much as possible. It is desirable to slow down the charging, and by terminating the charging in accordance with the operation start time of the heat pump unit 2, it is possible to delay the charging start time as much as possible, level the load, and increase the carbon dioxide emission reduction amount.

(Second Embodiment)
Next, a second embodiment will be described based on FIGS.

  The second embodiment is different from the first embodiment described above in that a time zone in which the power storage operation and the heat storage operation are simultaneously performed within the contract power capacity is provided. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In FIG. 4, the flowchart of the electrical storage heat storage control operation which the control means 100 of this embodiment performs is shown. In the present embodiment, when the required charge amount in the midnight time zone is calculated in step 109, the required charge time is calculated based on the calculated required charge amount, and the time until the charge power becomes a predetermined value or less (the voltage is If it is constant, a time required for the charging current to decrease and reach a predetermined value is calculated (step 210).

  Then, the charging start time for charging power to be equal to or less than the predetermined value is calculated at the boiling start time calculated in step 106 (step 211). Although not shown in the flowchart, the charge end time is calculated from the necessary charge time calculated in step 210 when the charge start time for charging power to be equal to or less than the predetermined value at the boiling start time is calculated. When it is later than the end time of the midnight time zone, that is, when it is determined that the charging is not completed in the midnight time zone, the charging start time is calculated so that the charging is completed at the end time of the midnight time zone.

  In step 211, in the present embodiment, the storage state of the storage unit is in a state where the stored power value has decreased to a predetermined value or less by the start time of operation of the heating unit, and one day determined based on past results. The power storage operation start time calculating means calculates the operation start time of the power storage means so that the required power storage amount is stored in the power storage means by the end time of the midnight time zone.

  After executing up to step 211, the control means 100 starts charging the secondary battery 10 at the time calculated in step 211 (step 112), and when the boiling start time calculated in step 106 is reached, the heat pump control circuit. A heat pump operation signal is output to 20 to start operation of the heat pump unit 2 (step 114). Then, when the charging end time calculated based on the required charging time in step 210 is reached, charging to the secondary battery 10 is stopped (step 213), and when 7 o'clock is reached, a heat pump stop signal is output to the heat pump control circuit 20 Then, the operation of the heat pump unit 3 is stopped (step 115).

  In the present embodiment, the predetermined state of the power storage means referred to in the present invention is a state where the stored power value has decreased to a predetermined value or less.

  According to the above-described operation, the control means 100 executes Step 106 shown in FIG. 4 and supplies the necessary heat amount for one day determined based on the past results in the hot water storage tank 31 by the end time of the midnight time zone. The heat storage operation start time of the heat pump unit 2 is calculated so as to be stored, step 211 is executed, and the power storage state of the secondary battery 10 is a predetermined value by the operation start time of the heat pump unit 2 calculated in step 106 The charging operation start time of the secondary battery 10 is calculated so as to be lowered to the following. Then, the secondary battery 10 is charged from the charging operation start time to the required charging time, and the heat pump unit 2 is operated from the heat storage operation start time to the end time of the midnight time zone to store heat in the hot water storage tank 31.

  Therefore, as shown in the operation example in FIG. 6, the heat storage operation of the heat pump unit 2 can be ended so that the necessary heat amount of the day can be stored by the end time of the midnight time zone, and the power storage operation and the heat storage operation are temporarily wrapped. Thus, the storage state of the secondary battery 10 can be set to a state in which the stored power value has decreased to a predetermined value or less by the start time of the heat storage operation.

  Thereby, the storage operation to the secondary battery 10 and the heat storage operation to the hot water storage tank 31 by operating the heat pump unit 2 can be completed by the end time of the midnight time period without greatly increasing the power consumption. The power storage operation and the heat storage operation can be performed satisfactorily with the power of the midnight time zone, which is cheaper than other time zones, while suppressing the increase in the contract power capacity.

  In this embodiment, the charging characteristics of the secondary battery are learned, and in the case of a characteristic in which the charging power value is reduced in the late charging stage like a lithium ion battery, the charging power is reduced to a predetermined value from the start of charging. By calculating the time required to come only as the time required for charging and wrapping part of the operation, it is possible to suppress an increase in contract power while shortening the total operation time between the power storage operation and the heat storage operation. This is extremely effective when the heat storage operation is performed after the power storage operation is completed and the midnight time zone is exceeded.

  FIG. 5 shows typical charging characteristics of a lithium ion battery. The charging power per cell is reduced to about 1/10 after 90 minutes from the start of charging. By using this characteristic, the time for charging power to fall below a certain value is calculated, and the time is adjusted to the heat pump water heater operation start time, so that power storage operation and midnight power hours can be achieved without increasing the contract power capacity. It becomes possible to carry out heat storage operation.

  Further, the secondary battery 10 is deteriorated in characteristics as shown in FIG. 7, for example, as shown in FIG. Therefore, the actual number of times of charging / discharging is stored, a deterioration characteristic is estimated according to the number of times of charging / discharging, and taking into account this deterioration characteristic, the time during which the state of charge is in a state where the stored power value is reduced below a predetermined value is calculated. Thus, it is possible to accurately obtain a time zone in which the power storage operation and the heat storage operation can be performed simultaneously.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG.

  Compared with the second embodiment described above, the third embodiment can change the heating capacity of the heat pump unit 2 that is a heating means, and adjusts the heating capacity of the heat pump unit 2 to perform power storage operation and heat storage. The difference is that driving is completed at midnight. In addition, about the part similar to 1st, 2nd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 8 shows a part of a flowchart of the power storage heat storage control operation performed by the control means 100 of the present embodiment. In this embodiment, when step 211 is executed as in the second embodiment, it is determined whether or not the charging start time calculated in step 211 is after 23:00 (step 301). If the charging start time is after 23:00 (in the case of YES at step 301), it means that the power storage operation and the heat storage operation can be completed in the late-night time zone. Therefore, similarly to the second embodiment, step 112 is performed thereafter. , 114, 213, and 115 are executed.

  If the charging start time is before 23:00 in step 301 (in the case of NO in step 301), the time when the charging power value reaches a predetermined value is calculated when it is assumed that charging started at 23:00, From the calculated estimated arrival time to 7 o'clock, which is the end time of the midnight time zone, the ability of the heat pump unit 2 to store the required amount of heat per day determined based on past performance in the hot water storage tank 31 is calculated ( Step 302).

  Then, the heat pump unit 2 is operated with the calculation capability, and the boiling start time for completing the heating of the required amount of heating heat by 7 o'clock, which is the end time of the midnight time zone, is recalculated (step 306). Further, the charging start time for the charging power value to reach a predetermined value at the boiling start time recalculated in step 306 is recalculated (step 311).

  Next, charging of the secondary battery 10 is started at the time recalculated in step 311 (step 312), and when the boiling start time recalculated in step 306 is reached, a heat pump operation signal is output to the heat pump control circuit 20 Then, the operation of the heat pump unit 2 is started under the condition after the heating capacity improvement calculated in Step 302 (Step 314). Then, when the charging end time calculated based on the recalculated charging start time and the necessary charging time is reached, the charging of the secondary battery 10 is stopped (step 313), and the process proceeds to step 115.

  According to the above-described operation, the control unit 100 cannot complete the power storage operation and the heat storage operation only when the charging operation start time is before the start time of the midnight time zone in step 301, that is, only in the midnight time zone operation. In the case where it is determined that the heating capacity of the heat pump unit 2 as the heating means is increased to a point where the storage operation and the heat storage operation can be completed in the midnight time zone, the start time of each operation is set under the condition of increasing the heating capacity. Recalculation is performed for each of the power storage operation and the heat storage operation. Therefore, the power storage operation to the power storage means and the heat storage operation of the heat storage means can be reliably performed in the midnight time zone.

(Fourth embodiment)
Next, a fourth embodiment will be described based on FIG.

  Compared to the third embodiment described above, the fourth embodiment performs the storage operation and the heat storage operation at midnight even when the heating capability of the heat pump unit 2 that is a heating means is increased to the maximum capability within the possible range. The operation when the belt cannot be completed will be described. In addition, about the part similar to the 1st-3rd embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 9 shows a part of a flowchart of the power storage heat storage control operation performed by the control means 100 of the present embodiment. In this embodiment, when the charging start time is before 23:00 in step 301 (NO in step 301), step 302 is executed in the same manner as in the third embodiment, and the calculated heat pump unit 2 It is determined whether the heating capacity is equal to or less than the maximum capacity that can be output, which is determined based on the operating environment conditions of the heat pump such as the contract power capacity and the outside temperature (step 401).

  If it is determined in step 401 that the capacity is less than or equal to the maximum capacity, the steps after step 306 shown in FIG. 8 are executed as in the third embodiment.

  If it is determined in step 401 that the maximum capacity is exceeded, the difference between the charge start time when the heat pump unit 2 is operated at the maximum capacity and the start time of the midnight time zone, that is, the power storage operation and the heat storage operation are performed. When charging to the secondary battery 10 is prohibited for an amount of time that cannot be covered in the midnight time zone (when priority is given to boiling operation over charging), power is supplied from other than the secondary battery 10 in a time zone other than the midnight time zone. Electric charge increase I (corresponding to the first power cost increase) by receiving the supply (using the grid power) is calculated (step 402).

  Next, an increase in the electricity charge II (second time when the heat pump unit 2 is operated in a time zone other than the midnight time zone for the difference time, that is, a time during which the power storage operation and the heat storage operation cannot be performed in the midnight time zone. (Corresponding to an increase in power cost) is calculated (step 403). Then, the electricity charge increase I and the electricity charge increase II are compared (step 404). If the electricity charge increase I is equal to or greater than the electricity charge increase II, the charging operation is prioritized in the midnight time zone. (Step 405) If the electricity charge increase I is less than the electricity charge increase II, the heating operation by the heat pump unit 2 is preferentially performed in the midnight time zone (Step 406).

  When step 405 is executed, the heating temperature of the hot water supply water when the heat pump unit 2 is operated and stored in the hot water storage tank 31 at midnight time, and the required amount of heat for one day is stored in the hot water storage tank 31 at midnight time. Is lower than the heating temperature of the hot water supply water. Specifically, the capacity of the hot water storage tank 31 is effectively used, the amount of heat that cannot be stored in the midnight time zone is subtracted, the boiling temperature in the midnight time zone is recalculated, and the hot water storage temperature is lowered. Thus, since the boiling temperature can be lowered by effectively using the capacity of the hot water storage tank 31, heat storage efficiency (operation efficiency of the heat pump unit 2) can be improved.

  In addition, when priority is given to the charging operation at midnight in step 405, the amount of heat that cannot be stored in the midnight time is restarted by operating the heat pump unit 2 outside of the midnight time (for example, morning and evening hours). Do.

  In addition, when priority is given to the charging operation in the midnight time zone, the heat pump unit 2 can be continuously stored even after the end of the midnight time zone, the amount of heat that cannot be stored in the midnight time zone. However, in this case, the boiling temperature in the midnight time zone is not lowered.

  According to the above-described operation, even when the heat pump unit 2 is operated at the maximum capacity, the control unit 100 determines that the operation time of the power storage operation and the heat storage operation exceeds the midnight time zone (midnight time zone). If it is determined that the power storage operation and the heat storage operation cannot be completed only by the operation of the power supply), it is determined whether to prioritize the operation of the power storage or the heat storage in the midnight time zone based on the power cost, An increase in cost due to power consumption in the time zone can be suppressed.

  In the above embodiment, it is determined whether to prioritize the operation of power storage or heat storage in the midnight time zone based on the power cost, but in order to minimize the daily power consumption cost, The allocation between the heat storage operation time and the power storage operation time in the time zone may be determined.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIGS.

  In the fifth embodiment, when the power storage operation and the heat storage operation cannot be completed in the late-night time period, the remote controller 6 notifies the user or the like to that effect in comparison with the above-described fourth embodiment, and the energy saving operation is performed. It is different in that it promotes. In addition, about the part similar to 1st-4th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 10 is a front view showing a schematic configuration of the remote controller 6 which is a remote control means. As shown in FIG. 10, the remote controller 6 includes a display unit 60 formed of a liquid crystal panel and various operation switch groups.

  The display unit 60 can display the operation mode, date and time, amount of stored hot water, hot water temperature, and the like of a heat pump type hot water heater that is a heat storage means. Further, as various operation switches, a navigation mode switch 62 that is an operation status grasping operation means, an operation mode switch 63 that is an operation mode operation means, a hot water supply temperature switch 64 that is a hot water supply temperature setting means, and a pause switch 65 that is a pause operation setting means. Etc.

  When the operation time of the heat pump unit 2 and the charging time of the secondary battery 10 do not fit in 8 hours of the midnight time zone (when the operation time of the electricity storage operation and the heat storage operation exceeds the midnight time zone), the electricity storage operation and the heat storage operation The display unit 60 of the remote control 6 can be used to display whether the driving time is within the midnight time zone or not (the time when it is not within the range). Specifically, by operating the navigation mode switch 62, the display of the display area 61 of the display unit 60 is changed as shown in FIG. 11, and the time exceeding the midnight time zone is displayed. .

  That is, when the storage of the required amount of heat for the day and the storage of the required amount of storage for the day to the storage means are not completed by the end time of the midnight time zone, the storage and storage means of the required amount of heat for the day is not completed. The time shortage until the completion of the storage of the required amount of storage for the day is displayed. Thereby, the necessity of energy saving can be appealed to the user.

  In addition, if the storage of the required amount of heat to the heat storage means and the storage of the required amount of storage to the power storage means are not completed by the end time of the midnight time zone, the non-completion of other than the midnight time zone due to not being completed. An increase in power cost due to an increase in the amount of power used may be displayed on the display unit 60. Also by this, it is possible to notify the user of the increase in power cost due to the fact that the power storage operation and the heat storage operation cannot be completed only in the midnight time zone, and appeal the user to the need for energy saving.

  In addition, when the operation time of power storage operation and heat storage operation exceeds the midnight time zone, it shows the user how much the amount of hot water used can be saved to show the economic operation of only the midnight time zone operation. On the other hand, it is possible to provide a guidance function for improving usage. Specifically, by operating the navigation mode switch 62, the display in the display area 61 of the display unit 60 is changed as shown in FIG. The display shows whether the time has fallen into the midnight time zone.

  That is, if the heat storage means does not complete the storage of the necessary heat amount of the day and the storage of the required storage amount of the day to the storage means by the end time of the midnight time zone, The capacity of hot water supply, which is related information of the amount of heat different from the amount of heat that can be stored in the heat storage means by the end time of the midnight time zone, is displayed together with the required amount of stored electricity. Thereby, the necessity of energy saving can be appealed to the user.

  Furthermore, as a method of showing a preferable method of using the hot water heater to the user, a specific boiling temperature of the heat storage operation that can cover the power storage operation and the heat storage operation in the midnight time zone may be displayed. Specifically, by operating the navigation mode switch 62, the display in the display area 61 of the display unit 60 is changed as shown in FIG. 13, and if the boiling hot water storage operation is performed many times, the power storage operation and the heat storage operation are performed. The display shows whether the driving time is within midnight.

  That is, if the heat storage means does not complete the storage of the necessary heat amount of the day and the storage of the required storage amount of the day to the storage means by the end time of the midnight time zone, The preferred heating temperature of the heat medium by the heating means, which is related information on the amount of heat different from the amount of heat that can be stored in the heat storage means by the end time of the midnight time zone, is displayed together with the required amount of electricity storage.

  According to this, in the midnight time zone, it is necessary to save energy to the user by notifying the user of the boiling temperature necessary for completing the storage of the required amount of storage for the day and the storage of the required amount of heat for the day on the display unit 60. To promote the setting to lower the boiling temperature. Specifically, by operating the operation mode switch 63, the display in the display area 61 of the display unit 60 is changed as shown in FIG. 14A, and the boiling temperature (hot water storage temperature) currently set is changed. Displaying and operating the operation mode switch 63 and the hot water supply temperature switch 64 is preferable to change the display of the display area 61 of the display unit 60 as shown in FIG. 14B (the operation can be completed in the midnight time zone). ) The boiling temperature (hot water storage temperature) can be displayed and the setting of the boiling temperature can be changed.

  Here, when the storage of the required amount of heat to the heat storage means and the storage of the required amount of storage to the power storage means are not completed by the end time of the midnight time zone, It displays the capacity of hot water supply and the preferred heating temperature of the heat medium by the heating means, which is related information of the amount of heat with the difference between the amount of heat stored in the heat storage means and the amount of heat that can be stored in the heat storage means by the end of the midnight time zone, together with the storage of the required amount of storage However, the present invention is not limited to this, and other related information may be displayed, and heat storage means by the end time of the midnight time zone together with the storage of the required heat amount of the day and the required storage amount of the day The amount of heat of the difference from the amount of heat that can be stored in the heat may be directly displayed.

  In addition, the display unit 60 displays the amount of power stored in the power storage means in the midnight time zone, or the power cost reduction amount by storing power in the power storage means in the midnight time zone, at least one of the values of one midnight time zone or the cumulative value thereof. May be displayed. For example, by operating the navigation mode switch 62, the display of the display area 61 of the display unit 60 is changed as shown in FIG. 15, and the electricity bill reduction amount per month due to the storage in midnight is displayed. It may be a thing. Further, by operating the navigation mode switch 62, the display in the display area 61 of the display unit 60 may be changed as shown in FIG. . Further, by operating the navigation mode switch 62, the display in the display area 61 of the display unit 60 is changed as shown in FIG. Good. According to these, it is possible to appeal to the user the merit of storing power in the midnight time zone by the display on the display unit 60.

(Sixth embodiment)
Next, a sixth embodiment will be described based on FIG. 18 and FIG.

  In the sixth embodiment, a case will be described in which a setting for stopping the heat storage operation (boiling hot water storage operation) of the heat storage means is made. In addition, about the part similar to 1st-5th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in the display unit 60 in FIG. 18, for example, when the user is away for a long time due to going out or the like, the pause switch 65 (see FIG. 10) of the remote controller 6 is operated to store heat for a predetermined period (in this example, 5 days). The operation of the power storage device when the operation is stopped will be described with reference to the time chart shown in FIG.

  When the heat storage suspension mode for the predetermined period is set, the midnight time period excluding the midnight time period (for example, the night before the user returns home) closest to the end point of the predetermined period among the midnight time periods within the set predetermined period Then, while the heating operation (heat storage operation) by the heat pump unit 2 is prohibited, the amount of electricity stored in the secondary battery 10 is determined based on a predetermined amount (for example, a dark current supply amount for maintaining a refrigerator operation or a device standby state). When it falls below (quantitative), power storage operation is performed. According to this, it can suppress that the frequency | count of charging to the secondary battery 10 increases. Therefore, it is possible to prevent the life of the power storage means from being reduced by repeating unnecessary power storage.

  In addition, the midnight time period starts in the midnight time period closest to the start time of the predetermined period (for example, the first night when the user is absent) in the midnight time period within the predetermined period in which the heat storage suspension mode is set. The power storage operation is performed so that the maximum power storage amount is obtained regardless of the power storage amount at the time. According to this, it is possible to prevent the charged amount of the secondary battery 10 from falling below the predetermined amount described above in the midnight time zone after the next (next night). Therefore, the number of times of charging within the predetermined period in which the heat storage suspension mode is set can be further reduced.

  In addition, the midnight time period starts in the midnight time period closest to the end of the predetermined period (for example, the night before the user returns home) among the midnight time periods within the predetermined period in which the heat storage suspension mode is set. The power storage operation is performed so that the maximum power storage amount is obtained regardless of the power storage amount at the time.

  According to this, the storage operation time in the midnight time zone closest to the end time of the predetermined period (for example, the night before the user returns home) can be shortened, and the midnight time zone closest to the end time of the predetermined period (eg, the user It is possible to reliably reduce the storage time on the night before returning home. Therefore, the normal heat storage operation and the normal power storage operation as performed in any of the first to fourth embodiments described above are performed in the midnight time zone closest to the end point of the predetermined period (for example, the night before the user returns home). If done, the power storage operation and the heat storage operation can be reliably completed in the midnight time zone.

  When the secondary battery 10 is fully charged in the midnight time zone closest to the start time of the predetermined period or the midnight time zone closest to the end time in the midnight time zone within the predetermined period, Since the heat storage operation is suspended, the battery is fully charged from the start time to the end time of the midnight time zone (the 8H charging mode is set). According to this, the charging speed to the secondary battery 10 can be reduced using all the midnight time zone (for example, the charging current is reduced to reduce the chemical change speed inside the battery). Therefore, the secondary battery 10 is unlikely to deteriorate, and the battery life can be reliably prevented from being reduced.

  When the secondary battery 10 is fully charged in the midnight time zone closest to the start time of the predetermined time period or the midnight time zone closest to the end time in the midnight time zone within the predetermined time period, The battery life can be prevented from being reduced as long as the charging rate is lower than that during normal power storage operation, not limited to charging in the 8H charging mode.

(Seventh embodiment)
Next, a seventh embodiment will be described with reference to FIGS.

  In the seventh embodiment, a case will be described in which the user has set to not fill the bathtub the next day. In addition, about the part similar to 1st-6th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In general, most of the hot water stored in the hot water storage tank 31 is filled with water on the bathtub, and the amount of water heated up in the midnight hours is large on the eve of the day when the user does not fill the bathtub with water. It is possible to reduce it. Since it is difficult to detect this by learning control, if it is possible to set that the next day hot water filling is unnecessary with the remote controller 6, the charge priority operation to the secondary battery 10 in the midnight time zone is performed by the user's operation. Can be selected, and energy saving can be achieved.

  In the remote controller 6 (see FIG. 10), for example, the navigation mode switch 62 is operated to check the setting of the general hot water filling mode (see FIG. 21), or the bath automatic switch 66 during the navigation mode switch 62 operation. To change the setting of the next day hot water filling mode to the next day hot water non-filling mode (see FIG. 22).

  As shown in FIG. 20, when it is determined that the time has reached 23:00, the control unit 100 according to the present embodiment first determines whether or not the hot water non-filling mode for the next day is set (step 701). . When the next day hot water filling mode is not set, that is, when the next day hot water filling mode is set, normal charging operation (normal power storage operation) and normal boiling operation (normal heat storage operation) are performed. (Steps 703 and 704). Here, the normal charging operation and the normal boiling operation are the heat storage operation and the power storage operation as performed in any of the first to fourth embodiments described above, for example, steps 102 to 102 shown in FIG. 115 is an operation to execute 115.

  If the hot water filling mode is set for the next day, the boiling start time for storing the amount of heat obtained by subtracting the amount of heat filled with hot water from the remaining hot water storage amount and the heat amount learning result is calculated (step 705). Executing step 705 is equivalent to, for example, subtracting one hot water filling from the average amount of hot water calculated in step 103 when executing steps 102 to 106 shown in FIG.

  When step 705 is executed, a required charging time is calculated from the remaining battery level and the power consumption learning result (step 706). Executing step 706 is equivalent to executing steps 107 to 110 shown in FIG. 2, for example.

  When step 706 is executed, the sum of the charging time (storage operation time) in the midnight time zone and the heat pump unit boiling operation time (heat storage operation time) is set to a predetermined time (Z hours, here from 8 hours (midnight time zone time)) It is determined whether it is shorter than, for example, 2 hours (step 707). If it is determined that the sum of the power storage operation time and the heat storage operation time is not shorter than Z hours by 8 hours or more, the process proceeds to Steps 703 and 704.

  On the other hand, if it is determined in step 707 that the sum of the storage operation time and the heat storage operation time is shorter than 8 hours by Z hours or more, the storage operation is performed in the long charge mode (step 708). This means that the operation time of the power storage operation and the heat storage operation has a margin of Z hours or more, so the charge start time is recalculated so as to lower the charge rate than during the normal power storage operation, and the recalculated charge For example, the charging current is decreased from the start time, and the secondary battery 10 is charged until the boiling start time calculated in step 705, for example.

  When step 708 is executed, the heat pump unit 2 is operated from the boiling start time calculated in step 705 to perform a heat storage operation (step 709), and when 7:00, the heat storage operation of the heat pump unit 2 is stopped (step 115). .

  According to the above-described operation, when the time between the heat storage operation and the power storage operation has a margin time longer than a predetermined time with respect to the midnight time, the charging speed is reduced compared to the normal power storage operation, The battery operation time can be extended within the range, and the battery life can be prevented from being reduced.

  In the present embodiment, when the next day hot water filling mode is set, if the time between the heat storage operation and the power storage operation has a margin time longer than a predetermined time with respect to the midnight time, the long-time power storage mode is set. Regardless of whether or not the hot water filling mode is set the next day, if the time between the heat storage operation and the power storage operation has a margin time longer than the predetermined time for the midnight time, It may be one that stores electricity in the electricity storage mode.

(Eighth embodiment)
Next, an eighth embodiment will be described with reference to FIGS.

  The eighth embodiment differs from the first embodiment in the arrangement position of the secondary battery 10. In addition, about the part similar to 1st-7th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 23 is a schematic diagram illustrating a schematic configuration of the power storage heat storage device of the present embodiment. In the first embodiment, the hot water storage tank 3 1 and the secondary battery 10 are stored in the same casing 35. However, in the present embodiment, the secondary battery 10 is stored together with the heat pump unit 2, for example, a second member. It is installed on a suspension base 80 having a structure.

  FIG. 24 is a longitudinal sectional view showing a schematic structure of the heat pump unit 2. As shown in FIG. 24, the heat pump unit 2 (heat pump heat source) and the secondary battery 10, for example, the heat pump unit 2 on the upper stage of the two-stage suspension base 80 for the air conditioner and the secondary battery 10 on the lower stage of the suspension base 80. The air outlet 81 for the heat pump of the suspension base 80 and the ventilation opening (introduction opening) 82 for the secondary battery are connected to each other by a duct 83 that is an air guide passage forming member.

  The heat pump unit 2 includes an evaporator 21 that is an endothermic heat exchanger for absorbing heat from outside air, and a blower fan 22 that is a blowing means for blowing outside air to the evaporator 21. An exhaust port 84 is provided on the surface of the duct 83 that faces the air outlet 81. In the duct 83, the air guide path in the duct 83 and the exhaust port 84 are selectively opened and closed to the downstream of the air outlet 81. A switching damper 85 that switches the air passage on the side is provided. Further, the secondary battery 10 is provided with a temperature thermistor 86 as temperature detecting means for detecting the temperature of the battery pack body.

  When the secondary battery 10 is charged at midnight, when the temperature detected by the temperature thermistor 86 rises to a predetermined temperature or higher, only the blower fan 22 is operated without operating the compressor. As indicated by the arrows, the secondary battery 10 can be cooled by introducing outside air to at least the outer surface of the secondary battery 10. When cooling of the secondary battery 10 is not necessary, the blower fan 22 is stopped.

  Further, as described in the second embodiment, when the power storage operation and the heat storage operation are performed at the same time, the air is blown by the blower fan 22 while performing the cycle operation by operating the compressor. Therefore, the secondary battery 10 can be cooled by cold air that is 5 to 10 ° C. lower than the outside air that has been heat-exchanged and cooled by the evaporator 21, for example. When the secondary battery 10 does not need to be cooled, the switching damper 85 is switched and blown as indicated by the broken arrow, and is not blown to the secondary battery 10.

  The detected temperature information of one or a plurality of temperature thermistors 86 installed in the battery pack body is transmitted in the order of the PCS control circuit 40 → the water heater system control circuit 30 → the heat pump control circuit 20. When the temperature thermistor 86 detection temperature rises above the temperature at which the PCS control circuit 40 determines that battery cooling is necessary, the blower fan 22 is activated. Thereby, it is possible to easily cool the secondary battery 10 without setting a cooling fan dedicated to cooling the secondary battery.

(Ninth embodiment)
Next, a ninth embodiment will be described with reference to FIG.

  The ninth embodiment differs from the eighth embodiment in the flow direction of the cooling air. In addition, about the part similar to 1st-8th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 25 is a schematic diagram illustrating a schematic configuration of the power storage and storage device of the present embodiment. As shown in FIG. 25, a heat pump suction port 88 of the suspension base 80 and a secondary battery ventilation port (outlet port) 82 are connected by a duct 83 which is a wind guide path forming member.

  In the heat pump unit 2, the blower fan 22 is provided on the upstream side of the air flow of the evaporator 21. In addition, an intake port 89 is provided on the surface of the duct 83 facing the intake port 88. In the duct 83, the air guide path in the duct 83 and the intake port 89 are selectively opened and closed. A switching damper 85 for switching the air passage on the upstream side 88 is provided.

  When the secondary battery 10 is charged at midnight, when the temperature detected by the temperature thermistor 86 rises to a predetermined temperature or higher, only the blower fan 22 is operated without operating the compressor. As indicated by the arrows, the secondary battery 10 can be cooled by introducing outside air into the secondary battery 10. When cooling of the secondary battery 10 is not necessary, the blower fan 22 is stopped.

  Further, as described in the second embodiment, when the power storage operation and the heat storage operation are performed at the same time, the air is blown by the blower fan 22 while performing the cycle operation by operating the compressor. Therefore, the outside air heated by the secondary battery 10 passes through the evaporator 21. Accordingly, the amount of heat absorbed by the evaporator 21 can be increased, and the heat pump efficiency can be improved. When the secondary battery 10 does not need to be cooled, the switching damper 85 is switched and blown as indicated by the broken arrow, and is not blown to the secondary battery 10.

  Also according to the present embodiment, the secondary battery 10 can be easily cooled without setting a cooling fan dedicated to cooling the secondary battery.

(Tenth embodiment)
Next, a tenth embodiment will be described with reference to FIGS.

  The tenth embodiment is different from the above-described eighth and FIG. 9 embodiments in that the secondary battery 10 is cooled using the low-temperature water in the hot water storage tank 31. In addition, about the part similar to 1st-9th embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 26 is a schematic diagram illustrating a schematic configuration of the power storage and storage device of the present embodiment. As shown in FIG. 26, a heat exchanger 90 for temperature adjustment is provided so as to contact at least the outer surface of the secondary battery 10. Then, branching from the middle of the path of the heat pump inlet pipe 25, and joining again to the heat pump inlet pipe 25 downstream from the branch point, and a heat exchanger via pipe 91 provided with the heat exchanger 90 in the middle of the path. It is arranged. A three-way valve 92 for selectively switching the downstream water passage between the heat pump inlet pipe 25 side and the heat exchanger outlet pipe 91 side is provided at the branch point where the heat exchanger inlet pipe 25 branches from the heat pump inlet pipe 25. Has been.

  The heat pump water inlet pipe 25 connects the lower part of the hot water storage tank 31 and the water inlet of the water refrigerant heat exchanger 23 which is a substantial heating means of the heat pump unit 2. And the circulation pump 24 is provided in the site | part arrange | positioned in the heat pump unit 2 of the heat pump inflow piping 25. As shown in FIG.

  On the other hand, the heat pump outlet pipe 26 connects the water outlet of the water-refrigerant heat exchanger 23, which is a substantial heating means of the heat pump unit 2, and the top of the hot water storage tank 31. In the tank unit 3, a pipe 93 branched from the heat pump hot water discharge pipe 26 is provided, and the downstream end of the pipe 93 is connected to the lower part of the hot water storage tank 31. A three-way valve 94 that selectively switches the downstream water flow path between the heat pump hot water outlet pipe 26 side and the pipe 93 side is disposed at a branch point where the pipe 93 branches from the heat pump hot water outlet pipe 26.

  Based on the above-described configuration, the operation of the electricity storage heat storage device of the present embodiment will be described. When the temperature of the temperature thermistor 86 installed in the battery body (battery pack body) exceeds a predetermined value after 23:00 has passed and charging of the secondary battery 10 has started, the three-way valve 92 is heated. While switching to the exchanger-directed piping 91 side, the three-way valve 94 is switched to the piping 93 side. Thereafter, the circulation pump 24 set in the heat pump unit 2 is operated.

  As a result, a water flow path is formed in which water below the hot water storage tank 31 flows through the heat exchanger 90 and returns to the lower part of the hot water storage tank 31 as shown by a thick solid line in FIG. At 23:00, only hot water remains in the upper part of the hot water storage tank 31, and the water in the lower part is almost equal to the water supply temperature. Since control is performed to charge the secondary battery 10 before the boiling operation in the midnight time zone, water can be reliably circulated through the heat exchanger 90. The configuration indicated by the thick solid line in FIG. 27 and denoted by reference numeral 96 forms a circulation path in which the heat medium in the lower part of the tank returns to the lower part of the tank via the temperature adjusting heat exchanger. It can be said that it is a circulation passage piping.

  At this time, if hot water remains in the lower part of the hot water storage tank 31, the three-way valve 92 is switched to the heat pump inlet pipe 25 side, and the circulation pump 24 is operated while the three-way valve 94 is kept on the pipe 93 side. . As a result, a water flow path is formed in which the hot water in the lower part of the hot water storage tank 31 returns to the lower part of the hot water storage tank 31 without flowing through the heat exchanger 90, as shown by a thick solid line in FIG. After the hot water is circulated in this manner to dissipate the air and the temperature of the hot water in the lower part of the hot water storage tank 31 is lowered, the switching control is performed so that the distribution route as shown in FIG. 27 is obtained. At this time, the operation start time of the circulation pump 24 is calculated in advance based on the outside air temperature or the hot water temperature below the hot water storage tank 31 so that the hot water temperature below the hot water storage tank 31 falls below a predetermined value. At time, control is performed in advance so that the lower temperature of the hot water storage tank 31 becomes a temperature at which the secondary battery can be cooled.

  When cooling the secondary battery 10, for example, a cooling method using a blower fan as described in the eighth or ninth embodiment may be used in combination.

  Further, according to the above-described configuration, in order to keep the secondary battery 10 at a constant temperature at the time of low outside air or the like, the heat pump unit 2 is operated with a small capacity or intermittent operation, and the water flow path as shown in FIG. The secondary battery 10 can be heated and kept warm by forming and heat exchange in the heat exchanger 90. Thereby, it becomes possible to always adjust the temperature of the secondary battery 10 within a predetermined temperature range, and it is possible to provide a system that does not affect the charge / discharge performance even when the environmental temperature is lowered. In this case, the configuration indicated by the thick solid line in FIG. 27 and denoted by reference numeral 96 circulates so that the heat medium in the lower part of the tank returns to the lower part of the tank through the temperature adjusting heat exchanger and heating means. It can be said that this is a circulation passage pipe that forms a possible circulation passage inside.

  The circulation passage pipe 96 uses the heat pump water inlet pipe 25 and the heat pump hot water outlet pipe 26 as a part thereof, but is not limited to the configuration using these.

(Other embodiments)
The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In each of the above-described embodiments, the power storage device is described as being used for general households, but is not limited thereto, and may be used for, for example, a factory or a store. Absent.

  Moreover, in each said embodiment, although the secondary battery 10 of the electrical storage means was arrange | positioned in the hot water storage tank unit 3 or the heat pump unit 2, it is not limited to this. For example, the heat storage means may be installed outdoors in general, and the power storage means may be installed indoors. Indoors, the installation environment temperature of the power storage means is relatively difficult to change, and the temperature of the power storage means can be easily adjusted. The power storage means is preferably installed in a portion where the indoor temperature is stable.

  Further, the power storage means may be disposed inside an air passage forming member that forms an air passage returning from the indoor air-conditioned space to the indoor heat exchanger of the air conditioner. Also by this, the installation environment temperature of the power storage means is unlikely to fluctuate inside the air passage forming member through which air from the air-conditioned space flows, and the temperature control of the power storage means can be easily performed. For example, when the storage heat storage device is used in combination with the entire building air conditioning system, a stable ambient environment can be maintained at all times by returning to the indoor unit of the entire building air conditioning system and installing a secondary battery in the air circuit.

  Moreover, in each said embodiment, although the electrical storage means and the thermal storage means were both stationary types, it is not limited to this. For example, the power storage means may include a secondary battery mounted on a vehicle that uses electric power as all or part of traveling power.

  Moreover, in each said embodiment, although the thermal storage means was the hot water storage type hot-water supply apparatus which used a heat pump as a heating means, a heating means is not limited to this, For example, an electric heater may be sufficient.

It is the schematic diagram which showed schematic structure of the electrical storage heat storage apparatus in 1st Embodiment to which this invention is applied. It is a flowchart which shows the electrical storage heat storage control operation which the control means 100 of the electrical storage heat storage apparatus in 1st Embodiment performs. It is a time chart for demonstrating the operation example of the electrical storage heat storage apparatus in 1st Embodiment. It is a flowchart which shows the electrical storage heat storage control operation which the control means 100 of the electrical storage heat storage apparatus in 2nd Embodiment performs. It is a graph which shows the charge characteristic example of a lithium ion battery. It is a time chart for demonstrating the operation example of the electrical storage heat storage apparatus in 2nd Embodiment. It is a graph which shows the example of charging / discharging cycling characteristics of a lithium ion battery. It is a flowchart which shows a part of electrical storage heat storage control operation which the control means 100 of the electrical storage heat storage apparatus in 3rd Embodiment performs. It is a flowchart which shows a part of electrical storage heat storage control operation which the control means 100 of the electrical storage heat storage apparatus in 4th Embodiment performs. It is a front view which shows schematic structure of the remote control 6 of the electrical storage heat storage apparatus in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. (A), (b) is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 5th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 6th Embodiment. It is a time chart for demonstrating the operation example of the electrical storage heat storage apparatus in 6th Embodiment. It is a flowchart which shows the electrical storage heat storage control operation which the control means 100 of the electrical storage heat storage apparatus in 7th Embodiment performs. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 7th Embodiment. It is a figure which shows the example of a display of the display part 60 of the remote control 6 in 7th Embodiment. It is the schematic diagram which showed schematic structure of the electrical storage heat storage apparatus in 8th Embodiment. It is a longitudinal cross-sectional view which shows schematic structure of the heat pump unit 2 in 8th Embodiment. It is a longitudinal cross-sectional view which shows schematic structure of the heat pump unit 2 in 9th Embodiment. It is the schematic diagram which showed schematic structure of the electrical storage heat storage apparatus in 10th Embodiment. It is a schematic diagram for demonstrating the operation example of the electrical storage heat storage apparatus in 10th Embodiment. It is a schematic diagram for demonstrating the operation example of the electrical storage heat storage apparatus in 10th Embodiment.

Explanation of symbols

1 Power storage unit (power storage means)
2 Heat pump unit (part of heating means and heat storage means)
3 Tank unit (part of heat storage means)
21 Evaporator (heat exchanger for heat absorption)
22 Blower fan (Blower unit)
30 Water heater system control circuit (part of control means)
31 Hot water storage tank (tank)
35 Case 40 PCS control circuit (part of control means)
60 Display 63 Operation mode switch (part of heating temperature setting means)
64 Hot water supply temperature setting switch (part of heating temperature setting means)
83 Duct (air guide path forming member)
90 heat exchanger (heat exchanger for temperature control)
96 Circulation passage piping 100 Control means

Claims (24)

Power storage means (1) for storing electric power;
A heat storage means (2, 3) for actuating the heating means (2) with electric power to store heat,
Control means (100) for controlling the power storage operation of the power storage means and the heat storage operation of the heat storage means,
A power storage and storage device that performs a power storage operation of the power storage means and a heat storage operation of the heat storage means during a midnight time period when the power cost is lower than other time periods determined based on a power supply contract,
The control means includes
Heating operation start time calculating means (106) for calculating the operation start time of the heating means so as to store the necessary heat amount of the day determined based on the past results in the heat storage means by the end time of the midnight time zone. )When,
The power storage state of the power storage unit is in a predetermined state by the heating operation start time calculated by the heating operation start time calculation unit, and the required power storage amount for the day determined based on past performance is calculated at the midnight. Power storage operation start time calculating means (111) for calculating the operation start time of the power storage means so as to be stored in the power storage means by the end time of the time zone,
Based on the operation start time of the power storage means calculated by the power storage operation start time calculation means, and based on the operation start time of the heating means calculated by the heating operation start time calculation means. An electricity storage heat storage device that operates the heating means.   2. The power storage device according to claim 1, wherein the predetermined state of the power storage unit is a state in which a required power storage amount for a day determined based on past results is stored.   The power storage device according to claim 1, wherein the predetermined state of the power storage means is a state in which a stored power value is reduced to a predetermined value or less. The heating means can change the heating capacity,
The control means operates by increasing the heating capacity of the heating means when the operation start time of the power storage means calculated by the power storage operation start time calculation means is before the start time of the midnight time zone. The electrical storage heat storage apparatus in any one of Claim 1 thru | or 3 characterized by the above-mentioned.   When the operation start time of the power storage means calculated by the power storage operation start time calculation means is before the start time of the midnight time zone, the control means is configured to minimize the daily power consumption cost. The power storage heat storage device according to any one of claims 1 to 4, wherein an operation time of the heating unit and an operation time of the power storage unit in the midnight time zone are determined. The control means includes
When the power storage operation of the power storage device is prohibited by the difference time between the operation start time of the power storage device calculated by the power storage operation start time calculation device and the start time of the midnight time zone, a time zone other than the midnight time zone is set. A first power cost increase due to receiving power supply from other than the power storage means, and a second power cost increase due to performing the operation of the heating means for the difference time in a time zone other than the midnight time zone. Compare and
When the first power cost increase is greater than the second power cost increase, the power storage operation of the power storage means is preferentially performed in the midnight time zone, and the first power cost increase is the second power cost increase. 6. The power storage and storage device according to claim 5, wherein when the electric power cost is smaller than an increase in power cost, the heating unit is prioritized during the midnight time period. The heat storage means has a tank (31) for storing a heat medium heated by the heating means inside,
The control means is configured such that the amount of heat stored in the tank by the end time of the midnight time zone is insufficient with respect to the required heat amount of the day, and the amount of heat insufficient for the required heat amount of the day is set outside the midnight time zone. When the heating means is re-operated and stored in the tank, the heating temperature of the heating medium when the heating means is operated and stored in the tank during the midnight time zone is set to the midnight time zone. The storage heat storage device according to claim 5 or 6, wherein the temperature is lower than a heating temperature of the heat medium when it is assumed that a necessary amount of heat for the day is stored in a tank.   When the heat storage suspension mode for a predetermined period is set, the control means, in the midnight time zone excluding the midnight time zone closest to the end point of the predetermined period among the midnight time zones in the predetermined period, The power storage device according to any one of claims 1 to 7, wherein operation of the heating unit is prohibited and the power storage operation of the power storage unit is performed when a storage amount of the power storage unit falls below a predetermined amount. Thermal storage device.   In the midnight time zone that is closest to the start time of the predetermined period in the midnight time zone within the predetermined period, the control means is configured such that the maximum storage amount is set regardless of the storage amount at the midnight time zone start time. The power storage heat storage device according to claim 8, wherein the power storage unit performs a power storage operation.   In the midnight time zone that is second closest to the end time of the predetermined period in the midnight time zone within the predetermined period, the control means is configured to have the maximum power storage amount regardless of the power storage amount at the midnight time zone start time. The power storage heat storage device according to claim 8 or 9, wherein the power storage unit performs a power storage operation.   The control means performs the power storage operation of the power storage means from the start time to the end time of the midnight time zone when setting the maximum power storage amount regardless of the power storage amount at the midnight time zone start time. The power storage heat storage device according to claim 9 or 10.   The control means reduces the storage speed to the power storage means when the operation start time of the power storage means calculated by the power storage operation start time calculation means is a predetermined time or more after the start time of the midnight time zone. The power storage device according to any one of claims 1 to 11, wherein the power storage operation is performed.   When the heat storage means does not store the necessary heat amount for the day and the electricity storage means does not complete the accumulation of the necessary amount of electricity for the day until the end time of the midnight time zone, the time that is insufficient until the completion The power storage heat storage device according to any one of claims 1 to 12, further comprising a display unit (60) capable of displaying the above.   When the storage of the required heat amount of the day to the heat storage means and the storage of the required storage amount of the day to the power storage means are not completed by the end time of the midnight time zone, The power storage and storage device according to any one of claims 1 to 13, further comprising a display unit capable of displaying an increase in power cost due to an increase in the amount of power used outside of the midnight time zone.   When the heat storage of the required heat amount of the day to the heat storage means and the storage of the required storage amount of the day to the power storage means are not completed by the end time of the midnight time zone, the required heat amount of the day And a display unit capable of displaying the difference between the amount of electricity stored in the day and the amount of heat that can be stored in the heat storage means by the end of the midnight time period, or related information thereof. The electrical storage heat storage apparatus in any one of Claims 1 thru | or 14. The amount of heat stored in the heat storage means can be used as hot water supply water,
The power storage device according to claim 15, wherein the related information on the heat quantity of the difference is a capacity of the hot water supply water. The heat storage means includes a tank that stores therein a heat medium heated by the heating means, and a heating temperature setting means (63, 64) of the heat medium stored in the tank by the heating means,
The power storage device according to claim 15, wherein the related information of the heat quantity of the difference is a heating temperature of the heat medium by the heating unit.   The amount of power stored in the power storage means during the midnight time zone, or the power cost reduction amount due to the power storage in the power storage means during the midnight time zone, can be displayed as at least one of the values of one midnight time zone or its cumulative total An electrical storage heat storage device according to claim 1, further comprising a display unit. The heat storage means is
A tank for storing therein a heat medium heated by the heating means;
The power storage / storage device according to any one of claims 1 to 18, further comprising a casing (35) for storing the tank and the power storage means in the same space formed therein.   The power storage device according to any one of claims 1 to 18, wherein the power storage means is installed indoors.   19. The electric storage means is disposed inside an air passage forming member that forms an air passage returning from an indoor air-conditioned space to an indoor heat exchanger of an air conditioner. The power storage heat storage device according to any one of the above. The heating means includes an endothermic heat exchanger (21) for absorbing heat stored in the heat storage means from outside air, and an air blowing means (22) for blowing outside air to the endothermic heat exchanger. ,
An air guide path forming member (83) for forming an air guide path for introducing air so that air blown by the air blowing means passes through at least the outer periphery of the power storage means is provided. Item 20. The power storage heat storage device according to any one of Items 18. The heat storage means has a tank that stores therein the heat medium heated by the heating means from above,
A temperature adjusting heat exchanger (90) provided so as to be in contact with at least the outer peripheral surface of the power storage means;
A circulation passage pipe (96) that internally forms a circulation passage so that the heat medium in the lower portion of the tank returns to the lower portion of the tank via the temperature adjusting heat exchanger. The power storage heat storage device according to any one of claims 1 to 22, characterized by: The heat storage means has a tank that stores therein the heat medium heated by the heating means from above,
A temperature adjusting heat exchanger provided to be in contact with at least the outer peripheral surface of the power storage means;
A circulation passage pipe that internally forms a circulation passage so that the heat medium in the lower portion in the tank returns to the lower portion in the tank through the temperature adjusting heat exchanger and the heating means. The power storage heat storage device according to any one of claims 1 to 22, wherein

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