JP6251116B2 - Thermal storage control system, control device, and control method - Google Patents

Description

  The present invention relates to a heat storage control system, a control device, and a control method.

  In recent years, the concept of smart house has become known. A smart house intends to optimize power supply and demand in a house by introducing power generation equipment represented by, for example, a solar battery and a storage battery into the house and performing power management control. As an example of a smart house, a system for controlling hot water supply in a house is conceivable. Conventionally, a system such as Patent Document 1 is known as a system including a heat storage unit that stores hot water, a power generation unit, and a power storage unit.

JP 2012-115003 A

  In the system of Patent Document 1, boiling is performed according to one condition that the amount of hot water falls below a predetermined threshold. That is, the amount of hot water in the hot water storage tank is grasped by only one condition. Therefore, it was difficult to make a plan to boil hot water.

  Then, this invention is made | formed in view of the above-mentioned point, and it aims at providing the thermal storage control system, control apparatus, and control method which can boil up the required hot water systematically.

Heat storage control system according to the present invention in order to solve the above problems, comprises a water heater, and a control device for controlling the water heater, water heater, hot water detector for detecting the amount of hot water in the hot water storage tank and the hot water storage tank with the door, the control device, reference data acquisition unit for acquiring a reference data including hot water supply performance data and, arbitrarily selected from the reference data corresponding to the current operating mode of the hot water supply unit data and hot water amount detecting unit And a controller that determines the operation mode that the water heater should move to next using the data obtained each time the first period elapses , and the operation mode is boiling water, It is classified according to whether the hot water is being boiled .

  In the heat storage control system according to the present invention, the control unit predicts the hot water supply amount based on the hot water supply result data, and determines an operation mode capable of achieving the predicted hot water supply amount as an operation mode to be transferred next.

  In the heat storage control system according to the present invention, the hot water supply result data includes data obtained by accumulating the hot water supply results in a consumer in which the heat storage control system is installed.

  In the heat storage control system according to the present invention, the control device shifts to a specific operation mode in a second period longer than the first period.

  In the heat storage control system according to the present invention, the control unit controls the amount of heat stored in the hot water storage tank so that the minimum hot water temperature in the hot water storage tank becomes a temperature capable of sterilizing Legionella in a specific operation mode.

  In the heat storage control system according to the present invention, the data obtained by the hot water detection unit includes hot water data and hot water temperature data of the hot water storage tank.

  In the heat storage control system according to the present invention, the reference data further includes power unit price data.

  In the heat storage control system according to the present invention, the hot water amount detection unit detects the hot water amount by measuring the hot water temperature distribution in the height direction in the hot water storage tank.

A control device according to the present invention is a control device that controls a water heater having a hot water storage tank, and corresponds to a reference data acquisition unit that acquires reference data including hot water performance data and a current operation mode of the water heater. A controller that determines the operation mode that the water heater should transition to next using the data arbitrarily selected from the reference data and the data related to the hot water in the hot water storage tank every time the first period elapses ; The operation modes are classified according to whether hot water is being boiled or not .

A control method according to the present invention is a control method in a heat storage control system including a water heater and a control device that controls the water heater, and includes a step of detecting the amount of hot water in a hot water storage tank of the water heater, and hot water supply performance data. The water heater moves to the next using the step of obtaining the reference data, the data arbitrarily selected from the reference data corresponding to the current operation mode of the water heater and the data obtained by the step of detecting the amount of hot water. look including the step of determining the operation mode to each time the first period elapses, the operation mode is either in boiling hot water, are classified according to whether not in boiling hot water.

  According to the heat storage control system, the control device, and the control method of the present invention, required hot water can be boiled up in a planned manner.

It is a block diagram which shows schematic structure of the thermal storage control system which concerns on one Embodiment of this invention. It is a figure which shows an example of a structure of the water heater of FIG. It is an operation mode transition diagram of a water heater. It is a graph which shows transition of the parameter concerning a heat storage control system. It is a figure which shows an example of the item of the setting parameter of a control apparatus, and its value. It is a flowchart which shows the control method in a thermal storage control system.

  Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a schematic configuration of a heat storage control system according to an embodiment of the present invention. The heat storage control system 100 shown here includes a water heater 110 and a control device 120. The water heater 110 includes a hot water storage tank 112, a hot water amount detection unit 114 that detects the amount of hot water in the hot water storage tank 112, and a heat exchange unit 116. In the present embodiment, the heat exchange unit 116 uses a heat pump heat exchanger, but may be an electric heater or a gas heater, for example, but is not limited thereto. The control device 120 includes a control unit 121, a reference data acquisition unit 122, and a storage unit 124 that stores reference data. As an example, the control unit 121 may perform control using HEMS (Home Energy Management System). In addition, the power storage control system 100 includes, as other equipment, a power storage unit 130, a power generation unit 132, a distribution board 134, a power conditioner 136 that connects the power storage unit 130 and the power generation unit 132 to the distribution panel 134, and a distribution panel 134. Is connected to the commercial power system 138. The power generation unit 132 can include, for example, a solar power generation system and a fuel cell, but is not limited thereto. The power storage unit 130, the power generation unit 132, the power conditioner 136, and the smart meter 140 can communicate with the control device 120 and are controlled by the control device 120.

  The control unit 121 acquires data including information on the hot water temperature and the hot water amount in the hot water storage tank 112 from the hot water amount detection unit 114. The reference data acquisition unit 122 of the control device 120 acquires reference data including hot water supply performance data and stores it in the storage unit 124. The reference data may further include power unit price data. The control unit 121 reads the reference data from the storage unit 124, sends an operation control signal to the heat exchange unit 116 based on the reference data, and controls the water heater 110. Here, the hot water supply result data may be data obtained by accumulating the hot water supply results in the customer where the heat storage control system 100 is installed, or statistically processed data obtained from a large number of customers. Also good. The unit price data may be unit price data provided by a power company. For example, the unit price data may be a TOU (Time of Use) power rate system that is predetermined for each time zone based on a past supply-demand difference. Such data may be used, or data related to RTP (Real Time Pricing) determined based on a real-time supply-demand difference, but is not limited thereto.

  FIG. 2 is a diagram illustrating an example of a configuration of the water heater 110 illustrated in FIG. 1. The internal structure of the hot water storage tank 112 will be described with reference to FIG. The hot water storage tank 112 has a stratified heat storage structure, in which hot water 220 is stored in the upper part of the tank and water 230 is stored in the lower part of the tank. There is no partition wall between the hot water 220 and the water 230, but the boundary 240 between the hot water 220 and the water 230 forms a temperature stratification boundary surface. It becomes difficult to mix. The hot water storage tank 112 is provided with a heat exchanging unit 116 at the lower portion, and performs boiling from water. The heat exchanging unit 116 is connected to a device for heating the heat medium via the heat medium pipe 218, for example, a heat pump, and the heat medium having a predetermined temperature is sent. A hot water discharge pipe 222 is connected to the upper part of the hot water storage tank 112, and the hot water 220 is discharged from the upper part of the hot water storage tank 112 in response to a hot water supply command. A water supply pipe 232 is connected to the lower part of the hot water storage tank 112, and the amount reduced by the hot water supply is supplied. At this time, the boundary 240 between the hot water 220 and the water 230 moves above the hot water storage tank 112.

  The hot water storage tank 112 includes a hot water amount detection unit 114, and the hot water amount detection unit 114 includes a plurality of thermometers 215. The thermometer 215 may be, for example, a thermocouple thermometer, but is not limited thereto. By using the data of the plurality of thermometers 215, the hot water temperature distribution in the height direction in the hot water storage tank 112 can be measured, and the hot water 220 and water stored in the hot water storage tank 112 are measured from the measured hot water temperature distribution. 230, the height 240 in the hot water storage tank 112 can be known. For example, assuming that the temperature of the hot water 220 is 50 degrees Celsius and the temperature of the water 230 is 20 degrees Celsius, the description will be made according to FIG. 2. The second thermometer from the top shows 50 degrees Celsius, and the third from the top. If the thermometer below the first thermometer indicates 20 degrees Celsius, the boundary 240 between the hot water 220 and the water 230 may be at a height between the second and third thermometers from the top. Recognize. If the height of the boundary 240 between the hot water 220 and the water 230 is known, the amount of the hot water 220 in the hot water storage tank 112 can be known, that is, the amount of hot water in the hot water storage tank 112 can be detected.

  The amount of heat stored in the hot water storage tank 112 can be defined based on the measured amount of hot water in the hot water storage tank 112 and the hot water temperature. In the present embodiment, the amount of heat is expressed in units of water volume. Specifically, the amount of heat necessary for boiling water at normal temperature X (L) to a set temperature is defined as X (L), and heat storage when the hot water storage tank 112 is filled with water at normal temperature is stored. The quantity is defined as 0 (L). In the present embodiment, the normal temperature is 20 degrees Celsius, the set temperature is 50 degrees Celsius, and the capacity of the hot water storage tank 112 is 300 (L). Under the above conditions, the amount of heat stored in the hot water storage tank 112 in a state where the hot water storage tank 112 is filled with hot water of the set temperature is 300 (L), which is equal to the capacity of the hot water storage tank 112.

  When the hot water temperature is lowered by natural heat radiation from a state where the hot water storage tank 112 is filled with hot water having a set temperature of 50 degrees Celsius, for example, when the hot water tank 112 is lowered by 1 degree from the set temperature to 49 degrees Celsius, The amount of stored heat is 290 (L). When the hot water storage tank 112 is filled with hot water at 70 degrees Celsius, the heat storage amount in the hot water storage tank 112 is 500 (L). On the other hand, when the hot water storage tank 112 is filled with water at 10 degrees Celsius, the heat storage amount in the hot water storage tank 112 is −100 (L).

  When the hot water 220 and the water 230 coexist in the hot water storage tank 112, for example, the hot water at the set temperature is 150 (L) and the normal temperature water is 150 (L). The amount of stored heat is 150 (L). In order to fill the hot water storage tank 112 with hot water at a set temperature from this state, water (150 L) at normal temperature may be boiled to the set temperature, and the amount of heat required for boiling is 150 (L). The amount of heat stored in the hot water storage tank 112 before boiling is 150 (L), and the amount of heat stored in the hot water storage tank 112 is 300 (L) because the amount of heat is 150 (L) by boiling. This is equal to the heat storage amount in a state where the hot water storage tank 112 is filled with hot water having a set temperature. Even if the temperature of the hot water 220 and the temperature of the water 230 are different from the set temperature and the normal temperature, respectively, if the respective heat storage amounts of the hot water 220 and the water 230 are calculated and added, they are stored in the hot water storage tank 112. The amount of heat storage can be calculated.

  In FIG. 1, the data obtained by the hot water detection unit 114 is sent to the control unit 121. The control unit 121 calculates a heat storage amount in the hot water storage tank 112 and controls the water heater 110 using the heat storage amount.

  FIG. 3 is an operation mode transition diagram of the water heater 110 in the heat storage control system 100 according to the present embodiment. The operation mode of the water heater 110 is classified according to the amount of heat stored in the hot water storage tank 112 and whether or not it is being heated, and is controlled by the control unit 121. The control unit 121 determines an operation mode to be transferred next every time a preset first cycle elapses. In the present embodiment, the first period is 15 minutes. The first period is not limited to 15 minutes, and may be 10 minutes, 20 minutes, or other time.

  The arrow indicating the transition between the operation modes in FIG. 3 is accompanied by a description indicating the transition condition. In the present embodiment, the boiling target heat quantity is defined as the transfer condition. The boiling target heat amount is equal to the difference between the heat storage amount when all the water in the hot water storage tank 112 reaches the set temperature and the current heat storage amount when boiling is performed in the current operation mode. The boiling target heat quantity is included in, for example, a condition for shifting from mode 1 to mode 3. Further, the heat storage amount included in the condition for shifting from mode 3 to mode 2 is the heat storage amount in the hot water storage tank 112 described above.

  Hereinafter, the control contents of the control device 120 and conditions for shifting to another operation mode will be described for each operation mode. In all operation modes, if the condition for shifting to another operation mode is not satisfied, the current operation mode is maintained.

  When operating for the first time, since the hot water storage tank 112 is entirely water, it operates in mode 1 (being heated from water). In mode 1, boiling is performed. In the present embodiment, the amount of heat to be heated, that is, the amount of heat given to the water in the hot water storage tank 112 by the boiling operation can be 20 (L) per 15 minutes. That is, it corresponds to an increase in the amount of heat storage by 20 (L) after boiling for 15 minutes. When the boiling target heat amount becomes equal to or less than the boiling heat amount, the mode shifts to mode 3 (heat storage amount is a predetermined value or more and cooking cannot be performed).

  In mode 3, a flag for prohibiting the additional cooking operation is set. As an action when this flag is set, for example, the scheduler operating inside the control unit 121 becomes in a state where it cannot issue a boiling command. Examples of the scheduler include ILOG (registered trademark), and the scheduler can play a role of making a plan for boiling hot water. In mode 3, when the hot water is discharged from the hot water storage tank 112 by the hot water supply command and the heat storage amount in the hot water storage tank 112 becomes less than a predetermined value, the mode is changed to mode 2 (the amount of heat storage is less than the predetermined value and the pot is being cooked). In the present embodiment, the predetermined value can be 200 (L). Further, in mode 3, when the temperature of the hot water 220 in the hot water storage tank 112 becomes 1 degree or more lower than the set temperature due to natural heat dissipation, the mode shifts to mode 4 (the amount of heat stored can be overheated at a predetermined value or more).

  In mode 2, additional cooking is performed, and when the boiling target heat quantity becomes a predetermined value or less, the mode 3 is entered. In the present embodiment, the predetermined value can be set to 20 (L).

  In mode 4, since a flag prohibiting the additional cooking operation is not set, additional cooking is possible. However, in principle, no additional cooking operation is performed unless the conditions for transition to mode 2 or 5 are satisfied and the mode 2 or 5 is transitioned to. In mode 4, when the heat storage amount becomes less than a predetermined value, the mode is shifted to mode 2. In the present embodiment, the predetermined value can be 200 (L).

  In mode 3 or 4, when a hot water supply amount of a predetermined amount or more is predicted within a predetermined time and the heat storage amount is less than the predetermined value, mode 5 (the amount of heat storage is within the predetermined range, but hot water is scheduled to be used, so additional cooking is required. Middle). In the present embodiment, the predetermined time can be 2 hours, and the predetermined amount predicted as the hot water supply amount can be 100 (L). Further, the predetermined value relating to the heat storage amount can be set to 250 (L). The prediction of the amount of hot water supply included in the condition for shifting to mode 5 is based on the actual hot water supply data included in the reference data. The control unit 121 can predict the hot water supply amount using data arbitrarily selected from the reference data stored in the storage unit 124.

  In mode 5, additional cooking is performed so that the predicted hot water supply amount can be achieved. The amount of additional cooking heat can be made different from the amount of heating heat, and in this embodiment, the amount of additional cooking heat can be 10 (L) per 15 minutes. When the boiling target heat amount becomes equal to or less than the additional heat amount, the mode 3 is entered. In mode 5, when hot water is discharged from the hot water storage tank 112 through the hot water discharge pipe 222 by the hot water supply command during the additional cooking, and the boiling target heat amount becomes a predetermined value or more, the mode is shifted to mode 2. In the present embodiment, the predetermined value can be 200 (L).

  In the present embodiment, the water heater 110 is controlled by the control unit 121 so as to operate by shifting the modes 1 to 5 to each other. In the present embodiment, it is further possible to shift to the mode 7, which is a specific operation mode aimed at Legionella sterilization. Transition to mode 7 can be forcibly shifted every time the second period elapses. The second period is longer than the first period, and can be, for example, one week. In that case, for example, a transition to mode 7 is performed on a designated date such as 23:00 every Friday. In mode 7, the temperature of all the water in the hot water storage tank 112, that is, the minimum hot water temperature in the hot water storage tank 112 is a temperature at which Legionella bacteria can be sterilized, for example, 70 degrees Celsius or more. Then, shift to mode 3. At this time, the amount of heat stored in the hot water storage tank 112 temporarily exceeds the normal maximum value. In addition, when heating to the temperature which can disinfect Legionella bacteria, not only a heat pump heat exchanger but an electric heater or a gas heater may be used together.

  In the present embodiment, the water heater 110 includes the mode 9 in addition to the operation mode described above, and when the operation cannot be performed due to an error or the like, the mode shifts to the mode 9 and the control unit 121 waits for an instruction from the outside. .

  In the present embodiment, the hot water supply result data used for the determination of the operation mode transition is, for example, for a hot water bath or shower, for dishwashing, or for a pattern of one day determined for each consumer. It is shown. In addition, it is conceivable that data obtained from a large number of customers is statistically processed and used as hot water supply performance data to cope with fluctuations due to seasons and weather conditions.

  Hereinafter, an example of a specific operation of the heat storage control system 100 according to the present embodiment will be described.

  An example of a specific operation state on a certain day will be described for the heat storage control system 100 installed in a certain consumer. In this embodiment, the heat storage control system 100 includes a solar power generation device. In addition, as for the unit price of electricity, an expensive daytime charge is applied between 7:00 am and 11:00 pm, and a cheap late-night charge is applied between 11:00 pm and 7:00 am.

  FIGS. 4A and 4B are graphs showing the transition of parameters related to the heat storage control system 100. Both the horizontal axes of the graphs of FIGS. 4A and 4B indicate the time from 6 am to 6 am the next morning, and the vertical axes of the graph of FIG. 4A are the amount of heat stored in the hot water storage tank 112 and the demand. The amount of hot water supplied to the house, the vertical axis on the left side of the graph in FIG. 4B is the remaining amount of electricity stored in the power storage unit 130, the vertical axis on the right side of the graph in FIG. The supply power from the commercial power system 138 and the load power of the consumer are shown.

  It should be noted that the amount of hot water supplied to the consumer includes the set temperature of the hot water 220 boiled in the hot water storage tank 112, the temperature of the water mixed and used when hot water is supplied to the customer, This is a value converted into the amount of heat stored in the hot water storage tank 112 based on the amount of hot water.

  When an activity at a customer starts at 6:00 am, a hot water supply demand and a power demand are generated. Hot water supply demand is met with hot water heated up at midnight. The electricity demand is cheaper until 7:00 am, so the power supplied from the commercial power system 138 is not enough. After 7:00 am, the power supplied from the commercial power system 138 with the higher power unit price is not used. Instead, it is covered by the discharge power from the power storage unit 130. From around 9:00 am, the power generated by the solar power generator is generated. While covering the daytime power demand with the generated power, power storage to the power storage unit 130 and reverse power flow to the commercial power system 138 are performed. The amount of heat stored in the hot water storage tank 112 decreases due to hot water supply demand in the morning and around noon. In preparation for hot water supply after the evening, the water will be heated up systematically from around 1 pm. The electric power related to this boiling is provided by the generated power and the discharged power from the power storage unit 130. From around 5:00 pm, hot water demand and power demand will occur again. Hot water supply demand can be met with hot water that has been boiled up to now. The electric power demand is covered by the discharged electric power from the power storage unit 130 until 11:00 pm, and after 11:00 pm is supplied by the electric power supplied from the commercial electric power system 138 whose electric power unit price has been reduced. Since the amount of heat stored in the hot water storage tank 112 has greatly decreased after meeting the demand for hot water supply in the evening, the power supplied from the commercial power grid 138, whose unit price of electricity has been reduced, is prepared for the demand for hot water supply in the following morning. Use and boil. Power storage to the power storage unit 130 is also performed depending on the situation. The next morning, a similar cycle begins again.

  The control of the water heater 110 performed by the control device 120 will be described in association with the above-described one-day cycle. At 6 am, the water heater 110 of the control device 120 is in the mode 3 state of the mode transition diagram shown in FIG. It shifts to mode 2 by covering the morning and noon hot water supply demand and reducing the heat storage amount. In mode 2, it is possible to boil, and it may or may not actually start boiling. Usually, the start of boiling is determined based on the prediction of the subsequent hot water supply amount. When boiling is started and completed, the mode shifts to mode 3. After 7:00 pm, a hot water supply amount of 100 (L) or more is predicted, but at 5 pm, two hours before the occurrence of the hot water supply demand, in addition to the prediction of the hot water supply amount, the condition of the heat storage amount is satisfied. To start boiling. When boiling is completed, the mode 3 is entered. A set amount of hot water supply starts, and when the amount of stored heat becomes a predetermined value or less, the mode 2 is entered. In mode 2, it is possible to boil, but whether to boil is determined based on the prediction of the amount of hot water supplied thereafter. In this embodiment, it is predicted that no hot water supply demand will occur until 6 am the next morning. The control unit 121 determines the start timing of boiling with reference to the power unit price data included in the reference data stored in the storage unit 124, and starts boiling after 11:00 pm when the power unit price is reduced. It is assumed that the heating is started at 11 pm, the boiling is completed at about 2 am, and the mode 3 is shifted to. Since there is no demand for hot water supply until 6:00 am, the temperature drops due to heat loss from the hot water storage tank 112 until then. When the temperature of the hot water 220 in the hot water storage tank 112 becomes lower than the set temperature by 6 o'clock or more by 6:00 am, the mode shifts to mode 4 and additional cooking is possible. In mode 4, it may or may not actually start boiling. Usually, the start of boiling is determined based on the prediction of the subsequent hot water supply amount. More specifically, the controller 121 appropriately determines the start of boiling based on data arbitrarily selected from the reference data.

  In order to perform Legionella sterilization in the hot water storage tank 112, a specific example of shifting to mode 7 will be shown and described. Transition to mode 7 is an interrupt process that occurs at the designated date and time when the second period has elapsed, and forcibly transits to mode 7 at any of the modes 1 to 5 at the designated date and time. To do. The designated date and time corresponding to the second cycle is arbitrarily set, but is set at 11 pm on Friday in this embodiment. In order to obtain the effect of Legionella sterilization, it is necessary to boil all the water in the hot water storage tank 112 to a temperature at which Legionella bacteria can be sterilized, for example, 70 degrees Celsius or more. It is only necessary to reach a temperature at which Legionella can be sterilized only by boiling with a heat pump heat exchanger, but in a system that is normally operated at a boiling temperature of 50 degrees Celsius, the capacity of the heat pump heat exchanger is insufficient. In some cases, other heat sources such as an electric heater or a gas heater can be used to boil Legionella to a sterilizable temperature. Mode 7 is maintained until the temperature of all the water in the hot water storage tank 112 reaches a temperature at which Legionella bacteria can be sterilized, and the mode 3 is shifted to when the temperature of all the water reaches a temperature at which Legionella bacteria can be sterilized.

  Next, a specific example when the setting parameter of the control device 120 is changed will be described. In this embodiment, setting parameters can be specified in a setting file. The setting file may be held inside the control device 120 or may be read from the outside. FIG. 5 shows an example of setting parameter items and their values specified in the setting file. Setting parameters related to transition between modes are listed. In the present embodiment, the first cycle is set as an interval, and the second cycle is set as a designated date and time corresponding thereto. In addition, various predetermined values used when the transition conditions between the operation modes are described with reference to FIG. 3 are listed as setting parameters. These parameters are appropriately determined according to the capacity of the hot water storage tank 112 and the capacity of the heat exchanger 116. It can be set when the system is installed, or it can be customized by the customer. Alternatively, it may be automatically set according to environmental changes such as seasonal changes.

  FIG. 6 is a flowchart showing a control method in the heat storage control system 100 according to the present embodiment. In step S <b> 602, the hot water amount detection unit 114 detects the amount of hot water in the hot water storage tank 112 of the water heater 110. In step S <b> 604, the reference data acquisition unit 122 acquires reference data including hot water supply performance data and stores it in the storage unit 124. In step S606, the water heater 110 uses the data arbitrarily selected from the reference data by the control unit 121 corresponding to the current operation mode of the water heater 110 and the data obtained by the hot water amount detection unit 114. The operation mode to be shifted to is determined. The heat storage control system 100 performs the cycle from step S602 to S606 every time the first period elapses. The operation of the control unit 121 when performing step S606 is as already described with reference to FIG.

  The specific operation of the heat storage control system according to the present embodiment has been exemplified above. In general, it is advantageous to increase the amount of heat storage from the viewpoint of ensuring the supply of hot water. On the other hand, in order to increase the amount of stored heat, it is necessary to increase the temperature of the hot water or increase the amount of hot water. From the viewpoint of restraining capital investment, the temperature of the hot water is limited by the ability of the heat exchanger 116, and the amount of hot water Is restricted by the capacity of the hot water storage tank 112. Further, from the viewpoint of suppressing heat loss, it is advantageous to reduce the heat storage amount. Furthermore, from the viewpoint of the unit price of electric power, the time zone for performing boiling is restricted. In order to control the supply of hot water and ensure the economy, it is advantageous to be able to grasp the amount of hot water in detail. According to the present embodiment, the temperature of the hot water 220 in the hot water storage tank 112 is set to 50 degrees Celsius or less, heat loss from the hot water storage tank 112 can be suppressed, the temperature reached by the heat exchanger 116 is lowered, and the heat exchanger 116 The efficiency increases and the capital investment of the heat exchanger 116 can be reduced. Along with this, there is a demerit that the amount of stored heat decreases, but the hot water storage tank 112 is equipped with a hot water amount detection unit 114 so that the amount of hot water can be grasped in detail, and this can be dealt with by increasing the accuracy of the plan for boiling hot water. it can. In addition, when the hot water storage tank 112 is managed at 50 degrees Celsius or less, Legionella bacteria may propagate in the hot water storage tank 112. However, according to the present embodiment, the hot water storage tank 112 is filled with the second cycle. The temperature of all of the water can be the temperature at which Legionella bacteria can be sterilized, and Legionella bacteria in the hot water storage tank 112 can be sterilized.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various changes or modifications based on the present disclosure. Therefore, it should be noted that these variations or modifications are included in the scope of the present invention. For example, the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and a plurality of components, steps, etc. can be combined into one or divided. It is.

DESCRIPTION OF SYMBOLS 100 Heat storage control system 110 Hot water heater 112 Hot water storage tank 114 Hot water amount detection part 120 Control apparatus 121 Control part 122 Reference data acquisition part 124 Storage part

Claims (10)

A heat storage control system comprising a water heater and a control device for controlling the water heater,
The water heater is
Includes a hot water storage tank, and a hot water detector for detecting a hot water of the hot water storage tank,
The controller is
A reference data acquisition unit for acquiring reference data including hot water supply performance data ;
And data arbitrarily selected from the previous SL water heater current operating mode the reference data corresponds to, with, and data obtained by the hot water quantity detector, the water heater is to be next transition operation A controller that determines the mode every time the first period elapses ,
The operation mode is classified according to whether the hot water is being boiled or not.
Thermal storage control system.   The heat storage control according to claim 1, wherein the control unit predicts a hot water supply amount based on the hot water supply result data, and determines an operation mode capable of achieving the predicted hot water supply amount as an operation mode to be shifted next. system.   The heat storage control system according to claim 1 or 2, wherein the hot water supply record data includes data obtained by accumulating the hot water supply record in a consumer in which the heat storage control system is installed.   The heat storage control system according to any one of claims 1 to 3, wherein the control device shifts to a specific operation mode in a second cycle longer than the first cycle. The controller is
Wherein in a specific operation mode, the lowest water temperature in the hot water storage tank to control the amount of heat stored in the hot water storage tank so that the Legionella bacteria sterilizable temperature, heat storage control system according to claim 4.   The heat storage control system according to any one of claims 1 to 5, wherein the data obtained by the hot water detection unit includes hot water data and hot water temperature data of the hot water storage tank.   The heat storage control system according to any one of claims 1 to 6, wherein the reference data further includes power unit price data. The heat storage control system according to any one of claims 1 to 7, wherein the hot water amount detection unit detects a hot water amount by measuring a hot water temperature distribution in a height direction in the hot water storage tank. A control device for controlling a water heater having a hot water storage tank,
A reference data acquisition unit for acquiring reference data including hot water supply performance data;
Using the data arbitrarily selected from the reference data corresponding to the current operation mode of the water heater and the data relating to the hot water in the hot water storage tank, the operation mode that the water heater should transition to next And a controller that determines each time the first period elapses ,
The operation mode is classified according to whether the hot water is being boiled or not.
Control device. A control method in a heat storage control system comprising a water heater and a control device for controlling the water heater,
Detecting the amount of hot water in the hot water storage tank of the water heater;
Obtaining reference data including hot water supply performance data;
Using the data arbitrarily selected from the reference data corresponding to the current operation mode of the water heater and the data obtained by detecting the amount of hot water , the water heater should move to the next and determining an operation mode each time the first period elapses seen including,
The operation mode is classified according to whether the hot water is being boiled or not.
Control method.

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