WO2018066037A1 - Dispositif d'alimentation en eau chaude de type à stockage, procédé d'alimentation en eau chaude et programme - Google Patents

Dispositif d'alimentation en eau chaude de type à stockage, procédé d'alimentation en eau chaude et programme Download PDF

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Publication number
WO2018066037A1
WO2018066037A1 PCT/JP2016/079309 JP2016079309W WO2018066037A1 WO 2018066037 A1 WO2018066037 A1 WO 2018066037A1 JP 2016079309 W JP2016079309 W JP 2016079309W WO 2018066037 A1 WO2018066037 A1 WO 2018066037A1
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Prior art keywords
hot water
storage tank
water storage
temperature
water supply
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PCT/JP2016/079309
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English (en)
Japanese (ja)
Inventor
啓輔 ▲高▼山
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三菱電機株式会社
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Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2018543493A priority Critical patent/JP6682002B2/ja
Priority to PCT/JP2016/079309 priority patent/WO2018066037A1/fr
Publication of WO2018066037A1 publication Critical patent/WO2018066037A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/18—Water-storage heaters

Definitions

  • the present invention relates to a hot water storage type water heater, a hot water supply method, and a program.
  • Patent Document 1 There is known a hot water storage type hot water supply machine that stores hot water generated by heating water in a hot water storage tank and supplies the hot water from the hot water storage tank (see, for example, Patent Document 1).
  • Patent Document 1 describes a system in which water in a hot water storage tank is boiled and supplied by a heat pump. In this system, when the amount of heat stored in the hot water storage tank is insufficient, the water taken out from the hot water storage tank is heated by the burner without supplying water in the hot water storage tank over time, and hot water is supplied.
  • the present invention has been made in view of the above circumstances, and an object thereof is to improve the energy consumption efficiency of a hot water storage type water heater.
  • a hot water storage type water heater of the present invention comprises a first heating means for heating water to generate first hot water, a hot water storage tank for storing the first hot water, and a first water intake from the hot water storage tank.
  • a heat exchanger that preheats the city water by heat exchange between the 1 hot water and the city water, and a second heating means that heats the city water preheated by the heat exchanger to generate the second hot water.
  • the present invention when the amount of the first hot water supplied from the hot water storage tank to the hot water outlet within a preset time is smaller than the capacity of the hot water storage tank, heat exchange with the first hot water taken from the hot water storage tank is performed.
  • the city water preheated by is heated and supplied to the hot water outlet. For this reason, the water temperature in the hot water storage tank can be lowered while supplying hot water using the heat quantity of the relatively high temperature in the hot water storage tank. Thereby, the energy consumption efficiency of a hot water storage type hot water heater can be improved.
  • FIG. Flow chart showing control process of hot water supply switching valve Flow chart showing operation process in tank hot water supply mode Flow chart showing operation process in preheating hot water supply mode Diagram showing temperature change of water passing through heat exchanger
  • the figure which shows the relationship between the primary side flow rate and secondary side flow rate of a heat exchanger Flow chart showing heat treatment
  • Flow diagram showing hot water operation Diagram for explaining actuator control The figure for demonstrating control of a discharge switching valve Flow chart showing high-temperature boiling operation process
  • the figure which shows the relationship between the water temperature of a 1st heating unit, and COP Figure showing changes in hot water supply load, amount of heat stored in hot water storage tank, and heating capacity The figure which shows the structure of the hot water storage type water heater which concerns on Embodiment 2.
  • FIG. FIG. 1 shows the configuration of hot water storage type hot water supply apparatus 1000 according to Embodiment 1.
  • the hot water storage type water heater 1000 is a water heater that heats water obtained from the water supply port 101 and supplies hot water from the hot water supply port 102.
  • the water supply port 101 is a water supply end connected to the water supply system, and receives city water as water supply from the water supply system. City water is, for example, tap water or clean water.
  • the hot water supply port 102 is a hot water supply end connected to a hot water use location represented by a hot water tap such as a faucet and a shower.
  • the thick continuous line in FIG. 1 shows a water pipe, and a broken line shows a signal line.
  • the hot water storage water heater 1000 passes through a hot water storage unit 100 that stores hot water in the hot water storage tank 120, a first heating unit 210 that heats water stored in the hot water storage tank 120, and the hot water storage tank 120.
  • a second heating unit 220 for heating and supplying the water supply, and a terminal 40 for the user to set the hot water supply temperature.
  • the hot water storage unit 100 includes a hot water storage tank 120 that stores water supplied through the water supply pipe 110 and hot water generated from the water, a circulation pump 130 that circulates stored water in the hot water storage tank 120, and hot water in the hot water storage tank 120.
  • a mixing valve 140 that mixes city water, a heat exchanger 160 that preheats city water using heat stored in the hot water storage tank 120, a hot water supply switching valve 180 that switches a flow path communicating with the hot water supply pipe 190, and the hot water storage unit 100
  • a control unit 11 for controlling the components.
  • the water supply pipe 110 is connected to the lower part of the water supply port 101 and the hot water storage tank 120.
  • a temperature sensor 111 for measuring the temperature of city water and a pressure reducing valve 112 for setting the pressure of the hot water storage tank 120 are attached to the water supply pipe 110.
  • the temperature sensor 111 transmits a signal indicating the measurement result to the control unit 11.
  • the water supply pipe 110 branches between the water supply port 101 and the pressure reducing valve 112 and is connected to the secondary side inlet of the heat exchanger 160.
  • the water supply pipe 110 branches between the pressure reducing valve 112 and the hot water storage tank 120 and is connected to the inlet of the mixing valve 140.
  • the water supply pipe 110 introduces city water from the water supply port 101 to the hot water storage tank 120, the heat exchanger 160, and the mixing valve 140.
  • the hot water storage tank 120 is a tank having a capacity in the range of 150 to 600L, for example, 300L or 500L.
  • the hot water storage tank 120 normally stores water up to full water. City water is supplied to the lower part of the hot water storage tank 120 to form a low temperature layer, and hot water generated by the first heating unit 210 is supplied to the upper part of the hot water storage tank 120 to form a high temperature layer. Due to the temperature gradient of these layers, temperature stratification is formed inside the hot water storage tank 120.
  • a plurality of temperature sensors 121, 122, 123, and 124 for measuring the temperature of the hot water are attached in the height direction. These temperature sensors 121 to 124 transmit signals indicating measurement results to the control unit 11.
  • the suction port of the circulation pump 130 is connected to the lower part of the hot water storage tank 120 and the primary side outlet of the heat exchanger 160 via a suction switching valve 131.
  • the suction switching valve 131 switches the flow path so that either the hot water storage tank 120 or the heat exchanger 160 and the circulation pump 130 communicate with each other in accordance with a control command from the control unit 11.
  • the discharge port of the circulation pump 130 is connected to the lower part of the hot water storage tank 120 and the first heating unit 210 via the discharge switching valve 132.
  • the discharge switching valve 132 switches the flow path so that either the hot water storage tank 120 or the first heating unit 210 and the circulation pump 130 communicate with each other in accordance with a control command from the control unit 11.
  • the circulation pump 130 operates at a rotational speed according to a control command from the control unit 11 and sends out water to generate a water flow that flows in a circulation path described later.
  • the suction port of the mixing valve 140 is connected to the upper part of the water supply pipe 110 and the hot water storage tank 120, and the discharge port of the mixing valve 140 is connected to the suction port of the hot water supply switching valve 180.
  • the mixing valve 140 discharges hot water generated by mixing hot water flowing out from the upper part of the hot water storage tank 120 and city water to the hot water supply switching valve 180.
  • the ratio of mixing by the mixing valve 140 is variable and follows a control command from the control unit 11.
  • a temperature sensor 141 that measures the temperature of hot water taken out from the hot water storage tank 120 is attached to a water distribution pipe that connects the mixing valve 140 and the hot water storage tank 120.
  • the temperature sensor 141 transmits a signal indicating the measurement result to the control unit 11.
  • the heat exchanger 160 preheats city water by exchanging heat between hot water in the hot water storage tank 120 flowing on the primary side and city water flowing on the secondary side.
  • the primary side inlet of the heat exchanger 160 is connected to the upper part of the hot water storage tank 120, and the primary side outlet is connected to the suction port of the suction switching valve 131.
  • a temperature sensor 161 for measuring the temperature of water flowing out from the primary side outlet is attached to the water distribution pipe connecting the primary side outlet and the suction switching valve 131.
  • the secondary inlet of the heat exchanger 160 is connected to the water supply pipe 110, and a flow rate sensor 163 for measuring the amount of water flowing into the secondary inlet is attached to the water supply pipe 110 near the secondary inlet. ing.
  • the secondary outlet of the heat exchanger 160 is connected to the second heating unit 220, and a temperature sensor 162 that measures the temperature of water flowing out from the secondary outlet is provided in the water distribution pipe near the secondary outlet. Is attached.
  • the temperature sensors 161 and 162 and the flow sensor 163 transmit a signal indicating the measurement result to the control unit 11.
  • the suction port of the hot water supply switching valve 180 is connected to the discharge port of the mixing valve 140 and the second heating unit 220, and the discharge port of the hot water supply switching valve 180 is connected to the hot water supply pipe 190.
  • the hot water supply switching valve 180 switches the hot water supply source to be introduced into the hot water supply pipe 190 to either the hot water storage tank 120 or the second heating unit 220 in accordance with a control command from the control unit 11.
  • a pressure reducing valve 170 for setting a hot water supply pressure is attached to a water distribution pipe that guides hot water from the second heating unit 220 to the hot water supply switching valve 180.
  • the hot water supply pipe 190 is connected to the discharge port of the hot water supply switching valve 180 and the hot water supply port 102, and guides the hot water discharged from the hot water supply switch valve 180 to the hot water supply port 102.
  • a temperature sensor 191 that measures the temperature of the hot water supply and a flow rate sensor 192 that measures the amount of hot water are attached to the hot water supply pipe 190.
  • the temperature sensor 191 and the flow rate sensor 192 transmit a signal indicating the measurement result to the control unit 11.
  • the control unit 11 includes a microprocessor that executes a program, a RAM (Random Access Memory), and an EEPROM (Electrically Erasable Programmable Read-Only Memory) that stores the program.
  • the control unit 11 acquires the measurement results of the temperature sensors 111, 121 to 124, 141, 161, 162, 191 and the flow rate sensors 163, 192.
  • the control unit 11 acquires information including the hot water supply temperature from the terminal 40.
  • the control unit 11 controls the rotation speed of the circulation pump 130, the flow path communicated by the suction switching valve 131, the discharge switching valve 132, and the hot water switching valve 180, and the mixing ratio by the mixing valve 140. Details of the control processing by the control unit 11 will be described later.
  • the first heating unit 210 is a main heat source that generates hot water by heating the stored water in the hot water storage tank 120 with a heat pump.
  • the first heating unit 210 is connected to the hot water storage unit 100 via a water inlet pipe that introduces water from the lower part of the hot water storage tank 120 and a hot water outlet pipe that supplies the generated hot water to the upper part of the hot water storage tank 120.
  • the first heating unit 210 controls a refrigerant circulation path in which the compressor 211, the heat exchanger 212, the expansion valve 213, and the evaporator 214 are connected in this order by refrigerant piping, and components of the first heating unit 210.
  • Part 21 for example, CO2, HFC, HC, and HFO can be used as the refrigerant to be circulated in the refrigerant circuit, but the invention is not limited to this, and the type of refrigerant is arbitrary.
  • the compressor 211 compresses the refrigerant and discharges it to the heat exchanger 212 as a high-temperature and high-pressure gas.
  • the compressor 211 according to the present embodiment has an inverter and sets the rotation speed in accordance with a control command from the control unit 21.
  • the heat exchanger 212 heats the water on the secondary side to generate hot water by exchanging heat between the high-temperature refrigerant on the primary side and the water on the secondary side.
  • the secondary side inlet of the heat exchanger 212 is connected to the discharge port of the discharge switching valve 132 via the water inlet pipe.
  • the secondary side exit of the heat exchanger 212 is connected to the upper part of the hot water storage tank 120 through the hot water piping.
  • the refrigerant flowing into the heat exchanger 212 is cooled to become a low-temperature and high-pressure liquid, and is discharged to the expansion valve 213.
  • the expansion valve 213 depressurizes the refrigerant and discharges it to the evaporator 214 as a low-temperature and low-pressure liquid.
  • the expansion valve 213 according to the present embodiment can adjust the opening degree, and adjusts the opening degree so that the suction temperature or the discharge temperature of the compressor 211 becomes a constant temperature in accordance with an instruction from the control unit 21.
  • the evaporator 214 is a heat exchanger that performs heat exchange between the outside air guided by a blower (not shown) and the refrigerant.
  • the refrigerant flowing into the evaporator 214 is discharged into the suction port of the compressor 211 as a high-temperature and low-pressure gas by heat exchange with the outside air.
  • the control unit 21 includes a microprocessor that executes a program, a RAM, and an EEPROM that stores the program.
  • the control unit 21 acquires information from the terminal 40. This information includes instructions for starting and ending the heating operation by the first heating unit 210.
  • the control part 21 adjusts the heating capability of the 1st heating unit 210 by controlling the rotation speed of the compressor 211, and the opening degree of the expansion valve 213. FIG. This heating capacity may be kept constant by the control unit 21 or may be changed by the control unit 21 cooperating with the terminal 40 and the control unit 11.
  • the second heating unit 220 is an auxiliary heat source that generates hot water by heating city water by burning fuel represented by gas and kerosene with a burner.
  • the second heating unit 220 is connected to the hot water storage unit 100 via a water inlet pipe for introducing city water preheated by the heat exchanger 160 and a hot water outlet pipe for supplying the generated hot water to the hot water supply switching valve 180.
  • the second heating unit 220 is connected to the bathtub 50 via an outgoing pipe that supplies hot water to the bathtub 50 and a return pipe that guides water from the bathtub 50.
  • the second heating unit 220 includes a heat exchanger 221 that heats city water, a heat exchanger 222 and a pump 223 for supplying hot water to the bathtub, and a controller 22 that controls components of the second heating unit 220. ,have.
  • the heat exchanger 221 heats the city water to generate hot water by exchanging heat between the exhaust generated by the combustion by the burner and the city water.
  • a flow rate sensor 224 that measures the amount of city water flowing from the hot water storage unit 100 is attached to a water intake pipe connected to the heat exchanger 221 and the hot water storage unit 100. The flow sensor 224 transmits a signal indicating the measurement result to the control unit 22.
  • a variable opening control valve 225 for adjusting the amount of water is attached between the flow rate sensor 224 and the heat exchanger 221 in the water intake pipe. The adjustment valve 225 adjusts the water flow rate according to a control command from the control unit 22.
  • the incoming water pipe is branched between the control valve 225 and the heat exchanger 221 and connected to a bypass path that bypasses the heat exchanger 221.
  • This bypass passage is provided with a variable opening degree bypass valve 226 connected in parallel with the heat exchanger 221.
  • the bypass valve 226 sets the opening according to a control command from the control unit 22.
  • the hot water piping connected to the heat exchanger 221 and the hot water storage unit 100 merges with the bypass passage provided with the bypass valve 226.
  • This hot water supply pipe sends hot water mixed with hot water discharged from the heat exchanger 221 and city water passing through the bypass to the hot water storage unit 100.
  • a temperature sensor 228 for measuring the temperature of the mixed hot water is attached to the hot water piping. The temperature sensor 228 transmits a signal indicating the measurement result to the control unit 22.
  • the hot water supply pipe branches downstream from the junction with the bypass passage, and is connected to the return pipe of the bathtub 50 via a hot water filling valve 227 having a variable opening degree. The hot water filling valve 227 sets the opening according to a control command from the control unit 22.
  • the heat exchanger 222 heats water to generate hot water by exchanging heat between the exhaust gas generated by combustion by the burner and water.
  • the return pipe connected to the heat exchanger 222 and the bathtub 50 is branched in the middle of the return pipe and connected to the hot water supply pipe, and a pump 223 is attached between the connection portion with the hot water supply pipe and the heat exchanger 222. Yes.
  • the pump 223 operates at a rotational speed according to a control command from the control unit 22, and sends water discharged from the hot water filling valve 227 or water taken out from the bathtub 50 to the heat exchanger 222.
  • Hot water generated by the heat exchanger 222 is supplied to the bathtub 50 via a return pipe.
  • the control unit 22 includes a microprocessor that executes a program, a RAM, and an EEPROM that stores the program.
  • the control unit 22 acquires the measurement result from the flow sensor 224 and acquires information from the terminal 40. This information includes the hot water supply temperature input to the terminal 40, the start command for the hot water operation, and the start command for the reheating operation. Then, the control unit 22 instructs the burner to start and end combustion, and controls the opening degree of the adjustment valve 225, the bypass valve 226 and the hot water filling valve 227 and the rotational speed of the pump 223. Details of the control processing by the control unit 22 will be described later.
  • the hot water storage operation is a boiling operation in which the first heating unit 210 generates hot water by boiling water stored in the hot water storage tank 120.
  • the hot water storage operation starts according to the amount of heat stored in the hot water storage tank 120.
  • the amount of heat stored in the hot water storage tank 120 is calculated by the control unit 11 calculating the amount of heat stored in the hot water in the hot water storage tank 120 that is effective for the hot water supply load, based on the measurement results of the temperature sensors 121-124. Obtainable. For example, when a relatively small amount of general hot water supply load is generated, the thermal energy of the hot water in the hot water storage tank 120 is utilized by mixing the hot water and city water. Therefore, the heat storage amount is calculated by integrating the difference between the measurement results of the temperature sensors 121 to 124 and the reference value with respect to the volume of the hot water storage tank 120, with the reference value of the thermal energy as the temperature of the city water.
  • the reference value may be a predetermined value.
  • the hot water supply temperature set by the user is 40 ° C.
  • the 38 ° C. hot water stored in the hot water storage tank 120 cannot be used, so that the hot water stored in the hot water storage tank 120 exceeds a specific temperature.
  • the amount of heat storage may be calculated by integrating only for hot water.
  • the specific temperature may be a value determined in advance as 45 ° C., for example, or may be a value determined according to the hot water supply temperature.
  • the hot water supply load means demand for hot water supply, and the general hot water supply load may be a hot water supply load other than the hot water supply load by the hot water filling operation and the reheating operation.
  • the control unit 11 monitors the heat storage amount of the hot water storage tank 120 calculated from the measurement results of the temperature sensors 121 to 124, and starts the hot water storage operation when the heat storage amount falls below a predetermined threshold value. Specifically, the control unit 11 causes the first heating unit 210 to generate hot water in cooperation with the terminal 40 and the control unit 21.
  • the threshold value for starting the hot water storage operation corresponds to, for example, 10% of the maximum heat storage amount of the hot water storage tank 120.
  • the terminal 40 determines a target temperature of hot water to be generated according to the hot water supply temperature set by the user.
  • the hot water supply temperature is set to 40 ° C.
  • a positive value is A and (40 + A) ° C. is calculated as the target temperature.
  • the terminal 40 transmits the target temperature to the control unit 11.
  • the control unit 11 controls the suction switching valve 131 so that the lower part of the hot water storage tank 120 communicates with the suction port of the circulation pump 130, and the discharge port of the circulation pump 130, the first heating unit 210, and the like.
  • the discharge switching valve 132 is controlled so as to communicate with each other. Thereby, as shown by the solid line arrow in FIG. 1, the upper part of the hot water storage tank 120 passes through the suction switching valve 131, the circulation pump 130, the discharge switching valve 132, and the heat exchanger 212 from the lower part of the hot water storage tank 120. A circulation path returning to is formed.
  • control part 11 sends out the low temperature water which exists in the lower part of the hot water storage tank 120 to the heat exchanger 212 by operating the circulation pump 130. Thereby, the hot water produced
  • the control unit 11 adjusts the rotation speed of the circulation pump 130 so that hot water having a target temperature is generated.
  • the target hot water storage amount is calculated, for example, from the difference between the hot water supply load expected to occur from the present to a specific time in the future and the current heat storage amount of the hot water storage tank 120.
  • the future hot water supply load is preferably estimated by learning from actual hot water supply loads in the past several days.
  • the hot water supply load actually generated is the integrated value of the hot water supply amount measured by the flow sensor 192 and the integrated value of the difference between the hot water temperature measured by the temperature sensor 191 and the city water temperature measured by the temperature sensor 111. Is calculated from
  • control unit 11 may execute the hot water storage operation in a specific time period regardless of the heat storage amount of the hot water storage tank 120.
  • the specific time zone is, for example, a time zone in which the late-night electricity rate is low, or a time zone in which surplus of generated power generated by the power generation device installed together with the hot water storage type hot water heater 1000 occurs.
  • Control processing of hot water supply switching valve 180 Then, the control process of the hot water supply switching valve 180 by the control part 11 is demonstrated using FIG.
  • the control process shown in FIG. 2 is repeatedly executed at a constant cycle.
  • the fixed period is, for example, 1 minute.
  • control unit 11 determines whether or not the amount of heat stored in the hot water storage tank 120 exceeds a preset threshold value (step S1).
  • This threshold value corresponds to, for example, the maximum load as one hot water supply load among the hot water supply loads generated in the past several days among the general hot water supply loads. Further, the control unit 11 determines that the amount of stored heat exceeds the threshold when the measurement result by any of the temperature sensors 121 to 124 is higher than (hot water supply temperature + B) ° C., where B is a constant positive value. Good. Moreover, you may employ
  • the control part 11 controls the hot water supply switching valve 180 so that the hot water supply port 102 and the discharge port of the mixing valve 140 may connect, and an operation mode is set.
  • the tank hot water supply mode is set (step S2).
  • the tank hot water supply mode is an operation mode in which hot water in the hot water storage tank 120 is supplied from the hot water supply port 102. Details of the tank hot water supply mode will be described later.
  • the control part 11 controls the hot water supply switching valve 180 so that the hot water supply port 102 and the discharge port of the pressure-reduction valve 170 may communicate,
  • the operation mode is set to the preheating hot water supply mode (step S3).
  • the preheating hot water supply mode is an operation mode in which hot water generated by the second heating unit 220 from city water preheated by the heat exchanger 160 is supplied from the hot water supply port 102. Details of the preheating hot water supply mode will be described later.
  • control unit 11 ends the control process of the hot water supply switching valve 180.
  • the control unit 11 determines whether or not the hot water supply flow rate exceeds a threshold value (step S11). Specifically, when the hot water tap connected to the hot water supply port 102 is opened, the amount of hot water measured by the flow rate sensor 192 becomes greater than zero. The control unit 11 determines whether or not the measured value by the flow sensor 192 is equal to or greater than a certain threshold that can be detected stably.
  • step S11; No When it determines with the hot water supply flow volume not exceeding a threshold value (step S11; No), the control part 11 repeats determination of step S11. On the other hand, when it determines with the hot water supply flow volume exceeding a threshold value (step S11; Yes), the control part 11 controls the mixing valve 140 and adjusts hot water supply temperature (step S12). Specifically, the control unit 11 controls the mixing ratio of the mixing valve 140 so that the hot water temperature measured by the temperature sensor 191 is equal to the hot water temperature set in the terminal 40.
  • the control unit 11 controls the mixing ratio of the mixing valve 140 so that the hot water temperature measured by the temperature sensor 191 is equal to the hot water temperature set in the terminal 40.
  • control unit 11 determines whether or not the hot water supply flow rate is smaller than the threshold value (step S13). This threshold value is equal to the threshold value used in step S11.
  • step S13; Yes When it determines with the hot water supply flow volume being smaller than a threshold value (step S13; Yes), the control part 11 will be in a standby state, and will repeat the process after step S11. On the other hand, when it determines with the hot water supply flow volume not being smaller than a threshold value (step S13; No), the control part 11 repeats the process after step S12.
  • the hot water supply switching valve 180 connects the second heating unit 220 and the hot water supply port 102 by connecting the mixing valve 140 and the hot water supply port 102. Cut off. For this reason, city water does not flow into the 2nd heating unit 220, and heating of city water by the 2nd heating unit 220 is not performed.
  • This operation process is a process for preheating city water by the heat exchanger 160.
  • the process shown in FIG. 4 starts when the operation mode is set to the preheating hot water supply mode.
  • control unit 11 switches the flow path communicating with the suction switching valve 131 to the heat exchanger 160 side (step S21).
  • the control part 11 switches the flow path connected by the discharge switching valve 132 to the hot water storage tank 120 side (step S22).
  • the hot water storage tank 120 is connected to the hot water storage tank 120 via the heat exchanger 160, the suction switching valve 131, the circulation pump 130, and the discharge switching valve 132 from the upper part of the hot water storage tank 120.
  • a circulation path returning to the lower part is formed.
  • the control unit 11 determines whether or not the preheating flow rate measured by the flow rate sensor 163 exceeds a threshold value (step S23).
  • This preheating flow rate is the amount of water flowing into the second heating unit 220 through the secondary side of the heat exchanger 160, and increases when the hot water tap is opened.
  • the threshold value for determining the preheating flow rate corresponds to a certain amount of water that can be stably detected by the flow sensor 163.
  • step S23 If it is determined that the preheating flow rate does not exceed the threshold (step S23; No), the control unit 11 repeats the determination in step S23. On the other hand, when it determines with a preheating flow volume exceeding a threshold value (step S23; Yes), the control part 11 adjusts a preheating temperature while controlling the circulation pump 130 and producing a water flow in a circulation path (step S24). When a water flow is generated in the circulation path, the hot water flowing out from the upper part of the hot water storage tank 120 is cooled by passing through the primary side of the heat exchanger 160 and returns to the lower part of the hot water storage tank 120.
  • control unit 11 is configured so that the difference between the temperature of the city water measured by the temperature sensor 111 and the temperature of the primary outlet measured by the temperature sensor 161 is equal to a preset target value.
  • the number of revolutions of the circulation pump 130 is controlled to adjust the preheating temperature.
  • FIG. 5 shows the temperature change of the water flowing through the heat exchanger 160.
  • the line L1 shows the temperature change of the water which flows through the flow path on the primary side, and when the water flows from the primary side inlet to the primary side outlet, the water temperature changes along the solid line arrow.
  • Tw1i corresponds to the temperature of water flowing into the primary side inlet
  • Tw1o corresponds to the temperature of water flowing out from the primary side outlet.
  • a line L2 indicates a change in the temperature of the water flowing through the secondary-side flow path. When the water flows from the secondary-side inlet to the secondary-side outlet, the water temperature changes along the dashed arrow.
  • Tw2i corresponds to the temperature of the water flowing into the secondary side inlet
  • Tw2o corresponds to the temperature of the water flowing out from the secondary side outlet.
  • control unit 11 controls the rotation speed of the circulation pump 130 so that ⁇ TwL which is the difference between Tw1o and Tw2i shown in FIG. 5 is equal to the target value.
  • the control unit 11 reduces the rotational speed of the circulation pump 130 in this case to bring ⁇ TwL closer to the target value.
  • Tw1o becomes low and the city water cannot be sufficiently preheated. In this case, the control unit 11 increases the rotational speed of the circulation pump 130 to bring ⁇ TwL closer to the target value.
  • the primary flow rate can be set to an appropriate flow rate considering the preheating amount and the efficiency of heat exchange according to the secondary flow rate.
  • ⁇ TwL the water temperature in the lower part of the hot water storage tank 120 can be lowered, and the incoming water temperature of the first heating unit 210 when the boiling operation is subsequently executed can be lowered.
  • the energy consumption efficiency of the heating operation can be improved.
  • the refrigerant flowing through the refrigerant circuit of the first heating unit 210 is CO2
  • energy consumption efficiency can be greatly improved by lowering the incoming water temperature.
  • the heat exchanger 160 provides the city water with an appropriate amount of heat corresponding to the flow rate on the secondary side, the heat storage in the hot water storage tank 120 can be used effectively.
  • the rotation speed of the circulation pump 130 is controlled by instructing the circulation pump 130 at the rotation speed corresponding to the flow rate on the secondary side, as shown in FIG. 6, instead of adjusting the preheating temperature shown in FIG. May be executed. Since the rotational speed of the circulation pump 130 and the primary-side flow rate are substantially proportional, the primary-side flow rate can be made appropriate according to the secondary-side flow rate even by such an instruction.
  • step S24 the controller 11 determines whether or not the preheat flow rate is smaller than the threshold (step S25). This threshold value is equal to the threshold value used in step S23.
  • step S25; No When it is determined that the preheating flow rate is not smaller than the threshold value (step S25; No), the control unit 11 repeats the processing after step S24. On the other hand, when it determines with a preheating flow volume being smaller than a threshold value (step S25; Yes), the control part 11 enters into a standby state, and repeats the process after step S23.
  • Heating operation processing Next, the heating operation process executed by the control unit 22 of the second heating unit 220 in the preheating hot water supply mode will be described with reference to FIG.
  • control unit 22 determines whether or not the flow rate of the second heating unit 220 exceeds a threshold value (step S31). Specifically, the control unit 22 determines whether or not the measured value by the flow sensor 224 exceeds a certain flow rate that the flow sensor 224 can stably detect.
  • step S31 When it is determined that the flow rate does not exceed the threshold (step S31; No), the control unit 22 repeats the determination of step S31. On the other hand, when it determines with a flow volume exceeding a threshold value (step S31; Yes), the control part 22 ignites a burner (step S32). Thereby, heat exchange by the heat exchanger 221 is started, and the city water flowing into the heat exchanger 221 is heated.
  • control unit 22 controls the burner, the adjustment valve 225, and the bypass valve 226 to adjust the hot water supply temperature (step S33). Specifically, the control unit 22 obtains the temperature of hot water flowing out from the heat exchanger 221 from the temperature sensor 228, and controls the burner combustion amount so that this temperature approaches the target value. In addition, the control unit 22 controls the opening amount of the adjustment valve 225 to adjust the amount of water flowing into the second heating unit 220, and controls the opening amount of the bypass valve 226, thereby reducing the amount of water flowing through the bypass passage. Adjust to make the hot water temperature equal to the set value.
  • the hot water whose temperature of the hot water supply is adjusted by the second heating unit 220 returns to the hot water storage unit 100 through the hot water supply pipe, is decompressed by the pressure reducing valve 170, and is then supplied from the hot water supply port 102 via the hot water supply switching valve 180.
  • the control unit 22 determines whether or not the flow rate of the second heating unit 220 is smaller than the threshold value (step S34).
  • This threshold value is equal to the threshold value used in step S31.
  • the control part 22 repeats the process after step S32.
  • the control part 22 extinguishes a burner (step S35), enters into a standby state, and repeats the process after step S31.
  • the hot water supply switching valve 180 causes the pressure reducing valve 170 and the hot water supply port 102 to communicate with each other and blocks the flow path connecting the mixing valve 140 and the hot water supply port 102. . For this reason, the hot water in the hot water storage tank 120 is not supplied to the hot water supply port 102.
  • the rotation speed of the circulation pump 130 may be adjusted by adjusting the temperature of the preheated city water measured by the temperature sensor 162 to the target value. Good.
  • the rotation speed of the circulation pump 130 is increased, the heat exchange amount of the heat exchanger 160 is increased and the preheating temperature is increased.
  • the preheating temperature increases, the amount of heating to be heated by the second heating unit 220 with respect to the same hot water supply temperature decreases, so that it is possible to save fuel consumption.
  • the preheating temperature becomes excessively high, the incoming water temperature of the second heating unit 220 becomes high, and the hot water temperature cannot be adjusted by the second heating unit 220, or combustion may be stopped.
  • control unit 11 may adjust the rotation speed of the circulation pump 130 so that the target value of the preheating temperature becomes equal to the upper limit value of the incoming water temperature of the second heating unit 220.
  • This upper limit is, for example, 30 ° C.
  • the flow rate on the primary side of the heat exchanger 160 is controlled so that the preheating temperature becomes equal to the target value, compared with the case where ⁇ TwL shown in FIG.
  • the temperature of the water returning to the hot water storage tank 120 is increased, and the incoming water temperature of the first heating unit 210 is increased during the subsequent boiling operation.
  • a refrigerant that condenses on the high pressure side such as HFC, HC, HFO, etc.
  • the energy consumption efficiency against the rise of the incoming water temperature The degree of decrease is small.
  • the method of controlling the flow rate on the primary side so that the preheating temperature becomes equal to the target value is particularly effective when employing a refrigerant that condenses on the high pressure side.
  • the hot water filling operation is an operation for supplying a certain amount of hot water to the bathtub 50.
  • the terminal 40 transmits a hot water filling command to the control unit 22, and the hot water filling operation is started.
  • control unit 22 determines whether or not there is a hot water filling command from the terminal 40 (step S41). When it determines with there being no hot water filling command (step S41; No), the control part 22 enters into a standby state, and repeats determination of step S41.
  • step S41 when it is determined that there is a hot water filling command (step S41; Yes), the control unit 22 opens the hot water filling valve 227 (step S42) and ignites the burner (step S43). Thereby, the preheated city water flows into the second heating unit 220, branches after passing through the regulating valve 225, one is heated by the heat exchanger 221, and the other joins after passing through the bypass path. .
  • the combined hot water passes through the hot water valve 227 and is supplied to the bathtub 50 from both the forward piping and the return piping.
  • control unit 22 controls the burner, the adjustment valve 225, and the bypass valve 226 to adjust the hot water supply temperature (step S44). Specifically, the control unit 22 controls the burner combustion amount so that the hot water supply temperature measured by the temperature sensor 228 is equal to a preset hot water temperature target value. In addition, the controller 22 controls the opening of the adjustment valve 225 to adjust the amount of water flowing into the second heating unit 220. Moreover, the control part 22 shall control the opening degree of the bypass valve 226, adjust the amount of water which flows into a bypass channel, and shall make hot water supply temperature equal to a target value.
  • control unit 22 determines whether or not the hot water supply amount exceeds the hot water filling target value (step S45). This amount of hot water supply can be obtained by integrating the measured values by the flow sensor 224. In addition, the control part 22 may determine whether the amount of hot water supply exceeds the hot water filling target value using the output of the water level sensor which detects the water level of the bathtub 50.
  • step S45; No When it determines with the amount of hot water supply not exceeding the hot water filling target value (step S45; No), the control part 22 repeats the process after step S42. On the other hand, when it determines with the amount of hot water supply exceeding a hot water filling target value (step S45; Yes), the control part 22 extinguishes a burner (step S46) and closes the hot water filling valve 227 (step S47). Thereafter, the controller 22 ends the hot water filling operation process.
  • the control unit 11 of the hot water storage unit 100 executes the operation process in the preheating hot water supply mode shown in FIG. Thereby, the capacity of the hot water storage tank 120 does not require the amount of hot water for hot water filling. Therefore, the hot water storage type hot water heater 1000 can be configured using the hot water storage tank 120 having a small capacity.
  • the tank hot water supply mode operation is executed simultaneously with the hot water filling operation when the heat storage amount of the hot water storage tank 120 is larger than a preset threshold value.
  • the operation in the preheating hot water supply mode is executed simultaneously with the hot water filling operation.
  • the control unit 22 closes the hot water valve 227 and operates the pump 223. Thereby, a water flow is generated in the circulation path from the bathtub 50 through the return pipe, the pump 223, the heat exchanger 222, and the forward pipe to the bathtub 50. And the control part 22 ignites a burner and makes the heat exchanger 222 heat hot water again. In the reheating / warming operation, the operation process in the preheating hot water supply mode is not executed.
  • FIG. 9 shows an actuator control method of the hot water storage unit 100 when simultaneous operation is executed.
  • the flow rate on the secondary side of the heat exchanger 160 is about 15 to 20 L / min at the maximum, and the flow rate on the primary side increases with the flow rate on the secondary side.
  • the amount of water flowing into the first heating unit 210 during the hot water storage operation is, for example, about 1.15 L when the city water temperature in winter is 9 ° C., the hot water storage temperature is 65 ° C., and the heating capacity is 4.5 kW. / Min.
  • the control unit 11 controls the rotational speed of the circulation pump 130 so that the temperature difference ⁇ TwL becomes equal to the target value. Further, the control unit 11 controls the suction switching valve 131 so that the flow path connected to the heat exchanger 160 is fully opened. Moreover, the control part 11 controls the opening degree of the discharge switching valve 132 so that the tapping temperature becomes equal to the target value by adjusting the boiling flow rate of the first heating unit 210.
  • FIG. 10 shows the relationship between the opening degree of the discharge switching valve 132 and the flow rate.
  • a line L11 indicates a flow rate from the discharge switching valve 132 to the hot water storage tank 120 side
  • a line L12 indicates a flow rate from the discharge switching valve 132 to the first heating unit 210 side.
  • the circulation pump 130 adjusts the required flow rate on the primary side of the heat exchanger 160, and the discharge switching valve 132 is heated by the first heating unit 210.
  • the ratio between the flow rate required for the increase and the remaining flow rate returning to the hot water storage tank 120 is adjusted.
  • the hot water storage tank 120 stays in the hot water storage tank 120 for a long time, there is a possibility that germs may propagate in the stored water, which is not preferable. If the city water is sterilized with chlorine, the propagation of miscellaneous bacteria is suppressed, but once heated, for example, when the water temperature reaches about 20 to 45 ° C., Legionella bacteria may propagate. In the state where the hot water storage tank 120 is hermetically sealed and clean city water is always supplied, it can be said that there is almost no possibility of germs breeding.
  • the hot water in the hot water storage tank 120 is heated again to a high temperature at which the germs can be sterilized. There is a need to.
  • This temperature is, for example, 60 ° C. or higher.
  • the hot water storage type water heater 1000 performs the high-temperature boiling operation shown in FIG.
  • the high-temperature boiling operation is started when the hot-water storage type water heater 1000 becomes operational.
  • This high-temperature boiling operation is desirably performed in a time period before a large amount of hot water supply load is generated.
  • This time zone is, for example, a time zone from 15:00 to 18:00.
  • the controller 11 determines whether or not the amount of hot water supplied from the hot water storage tank 120 to the hot water outlet 102 within a preset time exceeds the capacity of the hot water storage tank 120 (step S51). That is, the control unit 11 determines whether hot water in the hot water storage tank 120 is retained. This stagnation means that the water is stored in the hot water storage tank 120 for a relatively long time set in advance without being reheated.
  • the preset time is, for example, 72 hours.
  • the amount of hot water discharged from the hot water storage tank 120 to the hot water supply port 102 is measured by the temperature sensor 111 and the temperature of the hot water discharged from the hot water storage tank 120 measured by the temperature sensor 141 after integrating the hot water supply flow rate measured by the flow rate sensor 192. It can be obtained by estimating the mixing ratio by the mixing valve 140 from the relationship between the temperature of the city water and the hot water temperature measured by the temperature sensor 191.
  • a flow rate sensor may be provided in the water pipe which connects the upper part of the hot water storage tank 120 and the inlet of the mixing valve 140, and the amount of hot water discharged may be calculated
  • step S51 determines that the water in the hot water storage tank 120 is not staying, and ends the high temperature boiling operation without boiling the hot water. .
  • step S51 determines that water has stayed in the hot water storage tank 120 for a long time, and controls the hot water supply switching valve 180.
  • the hot water supply port 102 and the second heating unit 220 are communicated with each other.
  • the control unit 11 sets the operation mode to the preheating hot water supply mode (step S52).
  • control unit 11 determines whether or not the current time is before a specific time at midnight (step S53).
  • the specific time is set in advance as, for example, 23:00 when the electricity rate is low.
  • step S53 If it is determined that the current time is before the specific time (step S53; Yes), the control unit 11 determines whether or not the heat storage amount of the hot water storage tank 120 is smaller than the threshold (step S54). This threshold value is equal to the threshold value for starting the hot water storage operation.
  • step S54 If it is determined that the heat storage amount is not lower than the threshold (step S54; No), the control unit 11 repeats the processing from step S53. On the other hand, when it determines with the heat storage amount being lower than a threshold value (step S54; Yes), the control part 11 determines whether the hot water storage temperature of the hot water storage tank 120 is lower than specific temperature (step S55).
  • the hot water storage temperature of the hot water storage tank 120 is an average temperature of the water in the hot water storage tank 120 and can be obtained from the measured values of the temperature sensors 121 to 124.
  • FIG. 12 shows the relationship between the incoming water temperature of the first heating unit 210 and COP (Coefficient Of Performance) as energy consumption efficiency.
  • the boiling temperature is a constant temperature set in advance, for example, 65 ° C.
  • hot water storage type water heater 1000 mainly consumes electric power to boil hot water, and generates shortage of hot water in combustion-type second heating unit 220.
  • Electric power is generated, for example, by burning fossil fuel in a thermal power plant.
  • primary energy efficiency can be used to evaluate the first heating unit 210 with the same evaluation index as the second heating unit 220 that directly inputs fuel.
  • the primary energy efficiency of the electric power that will eventually be consumed at home is about 36.9% of the fossil fuel input at the power plant.
  • the heat pump type first heating unit 210 can absorb heat from the atmosphere and obtain hot water supply heat that is equal to or higher than the input electric energy. For this reason, the primary energy efficiency of the first heating unit 210 can be obtained by multiplying the primary energy efficiency of the electrical energy by the COP.
  • the hot water combustion efficiency of the combustion type second heating unit 220 is about 95% even if it is highly efficient. Since the second heating unit 220 directly inputs the fossil fuel, the combustion efficiency can be regarded as the primary energy efficiency of the hot water supply.
  • step S55 When it determines with hot water storage temperature not being lower than specific temperature (step S55; No), the control part 11 repeats the process after step S53. Thereby, the operation process in the preheating hot water supply mode is executed. As a result, the water temperature in the hot water storage tank 120 decreases. As a result, the energy efficiency at the time of subsequent boiling-up operation (step S56) and boiling-up operation (step S57) can be improved.
  • step S55 when it determines with hot water storage temperature being lower than specific temperature (step S55; Yes), the control part 11 performs the high temperature boiling increase operation of the hot water storage tank 120 (step S56).
  • This high-temperature boiling operation is an operation in which the boiling temperature is set to 65 ° C., which is higher than the boiling temperature of the hot water storage operation, for example, and the amount of heat necessary for the day is predicted to be heated. Then, the control part 11 repeats the process after step S53.
  • step S53 If it is determined in step S53 that the current time is not earlier than the specific time of midnight (step S53; No), the control unit 11 performs a high-temperature boiling operation (step S57). In this high-temperature boiling operation, regardless of the hot water supply load expected on the next day, the whole hot water storage tank 120 is heated up to a sterilizable temperature. The high temperature boiling operation is executed instead of the hot water storage operation executed at midnight.
  • the incoming water temperature of the first heating unit 210 gradually increases.
  • the first heating unit 210 that is a heat pump type, when the incoming water temperature rises, the pressure on the high-pressure side increases, and the allowable pressure may be exceeded.
  • the operation of the compressor 211 is stopped, only the circulation pump 130 is operated, and the temperature at the bottom of the hot water storage tank 120 is 60 ° C.
  • the hot water in the lower part of the hot water storage tank 120 may be circulated to the upper part until it becomes.
  • the compressor 211 since the compressor 211 is stopped, heating by the first heating unit 210 is not executed, but the hot water in the upper part of the hot water storage tank 120 and the cold water in the lower part are mixed, and the temperature of the entire hot water storage tank 120 is increased. It can be 60 degreeC or more.
  • the control unit 11 ends the high-temperature boiling operation process.
  • the amount of heat stored in the hot water storage tank 120 increases when the hot water storage operation is executed in the midnight hours when the electricity rate is low.
  • the heat storage amount at the end time of the midnight time zone may be the maximum value that can store heat in the hot water storage tank 120, or may be in accordance with the expected hot water supply load. In the example shown in FIG. 13, the end time of the midnight time zone is 7:00.
  • a general hot water supply load is generated in the bathroom and kitchen faucet. Since this general hot water supply load is smaller than the hot water supply load generated by bathing, the operation process in the tank hot water supply mode is executed. During the time when the general hot water supply load is not generated, the heat storage amount gradually decreases due to the heat radiation from the hot water storage tank 120.
  • Hot water filling operation is executed around 19:00. At this time, since the operation process in the preheating hot water supply mode is executed, a decrease in the amount of heat stored in the hot water storage tank 120 and heating by the second heating unit 220 occur simultaneously.
  • the hot water filling operation is executed, the amount of heat stored in the hot water storage tank 120 is significantly reduced and becomes lower than the threshold value TH1 for controlling the hot water supply switching valve 180. That is, the operation mode shifts from the tank hot water supply mode to the preheating hot water supply mode. Thereafter, a general hot water supply load represented by a shower is generated, but the operation processing in the preheating hot water supply mode continues until the amount of heat stored in the hot water storage tank 120 falls below the threshold value TH2 for executing the hot water storage operation.
  • the first heating unit 210 starts the hot water storage operation.
  • the operation process in the preheating hot water supply mode is executed.
  • the target value of the heat storage amount of the hot water storage tank 120 is set to a hot water supply load that is expected to occur after the current time on that day. This target value is usually smaller than the target value for hot water storage operation during midnight hours.
  • the operation of the tank hot water supply mode is executed when the heat storage amount of the hot water storage tank 120 is larger than the threshold value TH1, and the operation of the preheating hot water supply mode is executed when the heat storage amount is smaller than the threshold value TH1. Is done. Although it is desirable to control the amount of heat storage so that it becomes the minimum at 24:00, which is the end time of the day, if the occurrence of a general hot water supply load is predicted after 24:00, at the time of 24:00 You may leave some heat storage.
  • the hot water storage type water heater 1000 As described above, in the hot water storage type water heater 1000 according to the present embodiment, even if water stays in the hot water storage tank 120 for a long time and it is necessary to perform a high temperature boiling operation, the operation in the preheating hot water supply mode is performed. By executing the above, the heat storage in the hot water storage tank 120 can be used.
  • the hot water storage type water heater 1000 executes the operation process in the preheating hot water supply mode, and executes the high temperature boiling operation after the water temperature of the hot water storage tank 120 is lowered. For this reason, when performing high-temperature boiling operation, the incoming water temperature of the heat pump type 1st heating unit 210 can be made low. Therefore, overall primary energy efficiency can be increased.
  • the hot water storage type water heater 1000 performs a high-temperature boiling operation that increases the amount of heat stored in the hot water storage tank 120 under conditions that require sterilization. For this reason, there is little increase amount of middle temperature water, and the energy consumption efficiency of the high temperature boiling operation performed at midnight of the day can be made high. In the high temperature boiling operation at midnight, out of the total amount stored in the hot water storage tank 120, the remaining hot water that has not been heated in the high temperature boiling operation may be boiled.
  • the energy consumption efficiency at the time of the hot water storage operation of the first heating unit 210 can be increased.
  • CO2 is used as the refrigerant
  • the high pressure side is a supercritical cycle, and the lower the incoming temperature of the first heating unit 210, the higher the energy consumption efficiency, which is effective.
  • the hot water storage unit 100 has a flow rate sensor 163 that measures the flow rate of city water
  • the second heating unit 220 has a flow rate sensor 224 that measures the flow rate of city water that flows in. For this reason, when the city water flowing into the second heating unit 220 is preheated by the hot water storage unit 100, there is no need to communicate between the control unit 11 of the hot water storage unit 100 and the control unit 22 of the second heating unit 220. Thus, the actuators of the hot water storage unit 100 and the second heating unit 220 can be controlled.
  • Hot water storage type hot water supply apparatus 1000 is different from that according to Embodiment 1 in that its constituent elements are controlled by one controller that executes a program.
  • FIG. 14 shows the configuration of hot water storage type water heater 1000 according to the present embodiment.
  • the hot water storage type water heater 1000 includes a controller 60 that controls the hot water storage unit 100, the first heating unit 210, and the second heating unit 220.
  • the controller 60 is configured as a computer having a processor 61, a main storage unit 62, an auxiliary storage unit 63, an input unit 64, an output unit 65, and a communication unit 66.
  • the main storage unit 62, auxiliary storage unit 63, input unit 64, output unit 65, and communication unit 66 are all connected to the processor 61 via an internal bus 67.
  • the processor 61 includes an MPU (Micro Processing Unit).
  • the processor 61 exhibits a function equivalent to that of the control units 11, 21, and 22 according to the first embodiment by executing the program 68 stored in the auxiliary storage unit 63.
  • the main storage unit 62 includes a RAM (Random Access Memory).
  • the main storage unit 62 loads the program 68 from the auxiliary storage unit 63.
  • the main storage unit 62 is used as a work area for the processor 61.
  • the auxiliary storage unit 63 includes a nonvolatile memory such as an HDD (Hard Disk Drive) or a flash memory. In addition to the program 68, the auxiliary storage unit 63 stores various data used for the processing of the processor 61.
  • HDD Hard Disk Drive
  • flash memory a nonvolatile memory
  • the auxiliary storage unit 63 stores various data used for the processing of the processor 61.
  • the input unit 64 includes, for example, an input key and a capacitive pointing device.
  • the input unit 64 acquires information input by the user and notifies the processor 61 of the information.
  • the output unit 65 includes a display device represented by an LCD (Liquid Crystal Display), for example.
  • the output unit 65 is, for example, formed integrally with a pointing device that configures the input unit 64 to configure a touch screen. Since the terminal 40 corresponds to the user interface of the hot water storage type hot water supply device 1000, the controller 60 may be configured without the input unit 64 and the output unit 65.
  • the communication unit 66 includes a communication interface circuit for communicating with an external device.
  • the communication unit 66 notifies the processor 61 of information included in a signal received from the outside, and transmits a signal for transmitting the information output from the processor 61 to an external device.
  • Information acquired from the outside by the communication unit 66 includes the measurement results of the sensors of the hot water storage unit 100, the first heating unit 210, and the second heating unit 220.
  • the information transmitted to the outside by the communication unit 66 includes instructions for the pumps and valves of the hot water storage unit 100, the first heating unit 210, and the second heating unit 220.
  • the hot water storage unit 100 is configured without the control unit 11 (see FIG. 1)
  • the first heating unit 210 is configured without the control unit 21 (see FIG. 1)
  • the second The heating unit 220 is configured by omitting the control unit 22 (see FIG. 1).
  • the hot water storage type water heater 1000 has the controller 60 that controls its constituent elements. This facilitates maintenance and management of the program executed by the controller 60.
  • the flow rate sensor 163 that measures the flow rate on the secondary side of the heat exchanger 160 may be provided not near the secondary side inlet but near the secondary side outlet.
  • the user may be able to input a command for starting a high-temperature boiling operation from the terminal 40.
  • a command for starting a high-temperature boiling operation For example, in a home equipped with a solar power generation device, it may be sunny during the day and surplus power may be generated.
  • the terminal 40 informs the user that it is necessary to perform a high-temperature boiling operation, and surplus power High temperature boiling operation may be encouraged. Thereby, even when input electric power becomes large by execution of high temperature boiling operation, the raise of a running cost can be suppressed.
  • a controller of a HEMS (Home Energy Management System) including the hot water storage type hot water heater 1000 may instruct the hot water type hot water heater 1000 to perform a high-temperature boiling operation for sterilization in anticipation of generation of surplus power.
  • HEMS Home Energy Management System
  • a program stored in the EEPROM of the control units 11, 21, 22 and a program 68 stored in the auxiliary storage unit 63 are stored in a flexible disk, a CD-ROM (Compact Disk Read-Only Memory), a DVD (A device that performs the above-described processing is configured by storing and distributing it in a computer-readable recording medium represented by Digital Versatile Disk (MO) and MO (Magneto-Optical Disk), and installing these programs in the computer. Can do.
  • MO Digital Versatile Disk
  • MO Magnetic-Optical Disk
  • the program may be stored in a disk device included in a server device on a communication network represented by the Internet, and may be downloaded onto a computer, for example, superimposed on a carrier wave.
  • the above-described processing can also be achieved by starting and executing a program while transferring it via a network represented by the Internet.
  • processing can also be achieved by executing all or part of the program on the server device and executing the program while the computer transmits / receives information related to the processing via the communication network.
  • the means for realizing the functions of the hot water storage type water heater 1000 is not limited to software, and part or all of the means may be realized by dedicated hardware. For example, if a circuit represented by an FPGA (Field Programmable Gate Array) or an ASIC (Application Specific Integrated Circuit) is used, power saving of the hot water storage water heater 1000 can be achieved.
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • the present invention is suitable for a technique for supplying hot water generated by heating city water.

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Abstract

Dispositif d'alimentation en eau chaude de type à stockage (1000) comprenant : une première unité de chauffage (210) qui produit une première eau chaude par chauffage d'eau ; un réservoir de stockage d'eau chaude (120) qui stocke la première eau chaude ; un échangeur de chaleur (160) qui préchauffe l'eau de ville au moyen d'un échange de chaleur entre la première eau chaude prélevée dans le réservoir de stockage d'eau chaude (120) et l'eau de ville ; et une seconde unité de chauffage (220) qui produit une seconde eau chaude par chauffage de l'eau de ville préchauffée par l'échangeur de chaleur (160). La seconde eau chaude est apportée à une sortie d'alimentation en eau chaude (102) lorsque le volume de la première eau chaude apportée depuis le réservoir de stockage d'eau chaude (120) à la sortie d'alimentation en eau chaude (102) dans un temps prédéfini est inférieur à la capacité du réservoir de stockage d'eau chaude (120).
PCT/JP2016/079309 2016-10-03 2016-10-03 Dispositif d'alimentation en eau chaude de type à stockage, procédé d'alimentation en eau chaude et programme WO2018066037A1 (fr)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020225533A1 (fr) * 2019-05-03 2020-11-12 Open Energi Limited Procédé et système de commande pour faire fonctionner un composant électrique
JP2022016678A (ja) * 2019-08-06 2022-01-21 日立グローバルライフソリューションズ株式会社 給湯機

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006170526A (ja) * 2004-12-15 2006-06-29 Denso Corp 貯湯式給湯装置
JP2010091196A (ja) * 2008-10-08 2010-04-22 Denso Corp 給湯装置
JP2011214793A (ja) * 2010-04-01 2011-10-27 Takagi Ind Co Ltd 給湯装置
JP2012013301A (ja) * 2010-06-30 2012-01-19 Panasonic Electric Works Co Ltd 給湯システム
JP2012127628A (ja) * 2010-12-17 2012-07-05 Panasonic Corp 給湯システム
JP2013164173A (ja) * 2012-02-09 2013-08-22 Tokyo Gas Co Ltd 給水予熱システム
JP2013228150A (ja) * 2012-04-26 2013-11-07 Toho Gas Co Ltd 給湯暖房システム

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003148809A (ja) * 2001-11-13 2003-05-21 Toshiba Electric Appliance Co Ltd 貯湯式給湯装置
JP2015140968A (ja) * 2014-01-29 2015-08-03 三菱電機株式会社 貯湯式給湯機

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006170526A (ja) * 2004-12-15 2006-06-29 Denso Corp 貯湯式給湯装置
JP2010091196A (ja) * 2008-10-08 2010-04-22 Denso Corp 給湯装置
JP2011214793A (ja) * 2010-04-01 2011-10-27 Takagi Ind Co Ltd 給湯装置
JP2012013301A (ja) * 2010-06-30 2012-01-19 Panasonic Electric Works Co Ltd 給湯システム
JP2012127628A (ja) * 2010-12-17 2012-07-05 Panasonic Corp 給湯システム
JP2013164173A (ja) * 2012-02-09 2013-08-22 Tokyo Gas Co Ltd 給水予熱システム
JP2013228150A (ja) * 2012-04-26 2013-11-07 Toho Gas Co Ltd 給湯暖房システム

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WO2020225533A1 (fr) * 2019-05-03 2020-11-12 Open Energi Limited Procédé et système de commande pour faire fonctionner un composant électrique
JP2022016678A (ja) * 2019-08-06 2022-01-21 日立グローバルライフソリューションズ株式会社 給湯機
JP7203934B2 (ja) 2019-08-06 2023-01-13 日立グローバルライフソリューションズ株式会社 給湯機

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