JP2010007953A - Hot water supply system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water supply system improved in the efficiency of the charge/discharge of a storage battery by using heat stored in a tank. <P>SOLUTION: The hot water supply system includes a heat pump unit 1 for heating fluid used for supplying water for hot water supply; the tank 3 for storing the fluid heated by the heat pump unit 1; a heat storage means 4 comprising a plurality of batteries 4a performing charge/discharge; and a heat exchanger 7 which is one example of a temperature control means for controlling temperatures of the batteries 4a by using the heat quantity of the fluid stored in the tank 3. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a hot water supply system that includes a heating device by heating a fluid used for supplying hot water, a tank that stores the heated fluid, and a chargeable / dischargeable battery.

  This type of conventional hot water supply system is known to include a heat pump cycle, a storage battery that stores system power, and a hot water storage tank that stores heated hot water, and operates the heat pump cycle by the power of the storage battery. (For example, refer to Patent Document 1).

Such a storage battery is required to be charged and discharged as efficiently as possible from the viewpoint of effective use of energy.
JP-A-2005-164124

  In the conventional hot water supply system, the charging efficiency and discharging efficiency of the storage battery are greatly affected by temperature. For example, when the ambient temperature of the storage battery is low in winter or the like, or when the temperature of the storage battery is too high, there is a problem that the charging efficiency and the discharging efficiency are remarkably lowered.

  Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to provide a hot water supply system that utilizes heat storage in a tank to improve the efficiency of charging and discharging a storage battery.

  In order to achieve the above object, the following technical means are adopted. That is, 1st invention which concerns on a hot-water supply system performs charge and discharge with the heating apparatus (1) which heats the fluid used for supply of the hot-water supply, and the tank (3) which stores the fluid heated by the heating apparatus Power storage means (4) comprising a plurality of batteries (4a), and temperature adjusting means (7) for adjusting the temperature of the battery by moving the amount of heat of the fluid by circulating the fluid in the tank. It is characterized by.

  According to the present invention, by providing the temperature adjusting means, the fluid in the tank can be circulated and the amount of heat can be moved to be used for adjusting the temperature of the battery. As a result, the battery can be cooled and heated, and the amount of heat stored in the tank is effectively utilized for both hot water supply and ensuring charge / discharge efficiency. Therefore, it is possible to provide a hot water supply system that improves the efficiency of charging and discharging of the storage battery as well as energy saving of the entire system.

  The tank (3) and the power storage means (4) are preferably provided in the same housing (2). According to the present invention, the temperature of the battery can be adjusted in addition to the use of the amount of heat generated by the fluid in the tank, and the heat released from the tank can also be used for heat transfer via air. As a result, the amount of heat stored in the tank is effectively utilized for both fluid movement and air propagation, and further energy saving of the system can be achieved.

  Further, the temperature adjusting means includes a primary side circulation circuit (30, 33) in which the primary side fluid stored in the tank circulates, and a secondary side circulation circuit (in which the secondary side fluid passing through the power storage means circulates) ( 34) and heat exchange means (7) for exchanging heat between the primary fluid and the secondary fluid.

  According to this invention, the primary side fluid which is hot water supply water is heat-exchanged with the secondary side fluid by the heat exchange means via the independent primary side channel and the secondary side channel, and the temperature of the battery is adjusted. Therefore, the flow path configuration of each circulation circuit can be simplified. Moreover, since the temperature of the battery is not adjusted directly with the hot water supply water, it is easy to ensure the sanitary aspect of the hot water supply water.

  Furthermore, a heat exchanger (39) for thermally contacting the secondary fluid after passing through the power storage device and before flowing into the heat exchanging device with the primary fluid before flowing into the tank is provided. It is preferable to provide.

  According to this invention, the heat of the secondary fluid before flowing in by the heat exchange means can be given to the primary fluid before flowing into the tank. Thereby, the heating by a heating device can be assisted and energy saving can be achieved.

  The temperature adjusting means includes a tank circulation circuit (36, 37) provided so that the fluid in the tank circulates through the electricity storage means, and the fluid in the tank circulates in the tank circulation circuit to accumulate the electricity storage means. Cool and warm directly.

  According to the present invention, since the fluid in the tank is heat-exchanged with the battery of the power storage means, the temperature of the battery is directly adjusted. Thereby, the route of the hot water supply system can be constructed with a simple configuration, and the system can be reduced in size.

The hot water supply system further includes charge / discharge control means (6) for controlling charge / discharge of the power storage means,
The temperature adjusting means preferably adjusts the temperature of the charge / discharge control means by causing the fluid in the tank to flow to move the amount of heat of the fluid.

  According to this invention, the temperature adjusting means can adjust the temperature of both the power storage means and the charge / discharge control means using the fluid in the tank. As a result, the amount of heat stored in the tank is effectively utilized for both hot water supply and temperature control of the power-related equipment, and further energy saving of the entire system can be expected.

  The tank (3) and the charge / discharge control means (6) are preferably provided in the same housing (2). According to the present invention, the temperature of the charge / discharge control means can be adjusted in addition to the use of the amount of heat generated by the fluid in the tank, and the heat released from the tank can also be used for heat transfer via air. As a result, the amount of heat stored in the tank is effectively utilized for both fluid movement and air propagation, and further energy saving of the system can be achieved.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. Not only combinations of parts that clearly show that combinations are possible in each embodiment, but also combinations of the embodiments even if they are not specified unless there is a problem with the combination. Is also possible.

(First embodiment)
The hot water supply system of 1st Embodiment which is one Embodiment of this invention is demonstrated using FIG. FIG. 1 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. FIG. 1 shows a state in which the front portion of the housing 2 is removed so that the state of each part in the housing 2 can be understood.

  This hot water supply system is composed of a hot water supply unit that creates hot water supply water and a power supply unit that supplies electric power, and by circulating the fluid in the tank, the amount of heat of the fluid is moved to control the temperature of the battery. Temperature adjusting means for adjusting is provided. The hot water supply unit includes a heat pump unit 1 that is an example of a heating device that heats a fluid used for supplying hot water, a tank 3 that stores the heated fluid, and a hot water supply functional unit that controls a path of hot water and the like. And 5. The power supply unit includes power storage means 4 including a plurality of batteries 4a that perform charging and discharging. And these each part is connected by various piping etc.

  The operation of each part is controlled by a system control apparatus 100 which is a control means capable of controlling each part in the system. The system control device 100 may be a single control device that is provided in the same place as the hot water supply function product unit 5 and controls the entire system, or a plurality of control devices that are in charge of controlling each unit in the system. It may be a control device to be integrated.

  The hot water supply system of the present embodiment is a form in which a power storage means and a hot water storage type heat pump type hot water supply apparatus are accommodated in the housing 2. This hot water supply system is mainly used for hot water supply for general households. The power storage means 4 is an aggregate of a plurality of batteries 4a housed in a rack, and stores power obtained from system power, solar thermal energy, natural energy such as wind power generation, and the like. The electric power stored in the power storage means 4 can be widely used for hot water supply devices, household appliances in a house, automobiles, and the like. The heat pump hot water supply device adjusts the hot water for hot water stored in the tank 3 and the hot water boiled by the heat pump unit 1 to a temperature that satisfies the set temperature of the hot water supply to the kitchen, washroom, bathroom, etc. Supply to the terminal using the hot water supply. The hot water use side terminal is a hot water faucet such as a shower, a currant, a hand-washing tap, or a bath tub.

  The temperature adjusting means of the present embodiment is a heat exchanger for the primary side fluid (hot water supply water) stored in the tank 3 and the secondary side fluid (brine) forcibly circulated so as to pass through the power storage means 4. By performing heat exchange at 7, the heat absorption and heat dissipation of the battery 4a are controlled via the secondary fluid, and the temperature of the battery 4a is adjusted. This temperature adjustment is to adjust the temperature of the battery 4a to a temperature band where the charge / discharge efficiency can be efficiently performed when the battery 4a is charged and discharged.

  The power storage means 4 is an aggregate of a plurality of batteries 4a composed of lithium secondary batteries, nickel metal hydride batteries, and the like, and each battery 4a is installed in a predetermined rack so as to be stacked with a predetermined interval. Each battery 4a is surrounded by a flow path 4b of a secondary side fluid formed in the rack, and transfers heat to the secondary side fluid flowing through the flow path 4b. Among the stacked batteries 4a, a plurality of batteries 4a at predetermined positions are provided with battery thermistors 23 for detecting the surface temperature. The power storage means 4 stores, for example, inexpensive midnight time zone power (an example of system power) from a system power supply. In this case, the midnight time zone power is used for both the power storage in the power storage means 4 and the operation of the heat pump cycle. That is, in the time zone of midnight power, power storage in the power storage means 4 and heat storage in the tank 3 by operation of the heat pump cycle are performed.

  The heat pump unit 1 has a heat pump cycle that uses carbon dioxide having a low critical temperature as a refrigerant, and includes at least a compressor, a water-refrigerant heat exchanger as a radiator, a variable decompressor, an evaporator, and a gas-liquid separation. The devices are connected to form a closed circuit. The heat pump unit 1 heats up hot water by exchanging heat between a high-temperature and high-pressure refrigerant flowing through the refrigerant flow path of the water-refrigerant heat exchanger and water flowing through the water flow path of the water-refrigerant heat exchanger. . The system control device 100 receives detection information from various thermistors, performs calculation using a built-in program, and controls the operation of the variable pressure reducer and the compressor.

  When carbon dioxide is used as the refrigerant and the heat pump cycle is constituted by a supercritical heat pump, hot water having a temperature higher than that of a general heat pump cycle, for example, about 85 ° C. to 90 ° C. can be stored in the tank 3. The heat pump unit 1 is a hot water supply operation that heats up the hot water in the tank 3 mainly when the hot water stored in the tank 3 is insufficient or the midnight power in the midnight time zone where the price setting is inexpensive is used. I do. The heat pump unit 1 can also operate the heat pump cycle by using the electric power stored in the power storage means 4 for the operation of a compressor or the like.

  The tank 3 is a container for storing a hot water supply fluid, and is made of a metal excellent in corrosion resistance, for example, stainless steel. In the present embodiment, since the hot water in the tank 3 is discharged directly as hot water supply water, the hot water supply fluid stored in the tank 3 is water. A water supply pipe (not shown) for taking in city water such as tap water is connected to the lower part of the tank 3.

  A heat insulating material is provided on the outer periphery of the tank 3, and hot water for hot water supply can be kept warm for a long time. The tank 3 has a vertically long shape, and includes a can body thermistor 20 including five thermistors arranged in the height direction in order to detect a hot water storage amount and a hot water storage temperature inside the tank 3. The temperature information of hot water or water filled in the tank 3 at each water level is output to the system controller 100. Therefore, the system control apparatus 100 detects the boundary position between the hot water heated up in the tank 3 and the water before boiling in the tank 3 based on the temperature information detected by the can body thermistor 20. In addition, the hot water storage amount can be detected.

  A circulation pipe 30 is connected to the tank 3 to connect the lower part in the tank 3 and the upper part in the tank 3 via a water flow path of a water-refrigerant heat exchanger. The circulation pipe 30 is a boiling passage through which water in the lower part of the tank 3 is heated in the water passage of the water-refrigerant heat exchanger. In the middle of the circulation pipe 30, a pump 9 is provided as a driving means for forcibly circulating the water in the tank 3. By operating the heat pump cycle and the pump 9, the lower water in the tank 3 is heated and then returned to the upper high-temperature water section in the tank 3. Further, the tank 3 includes an intermediate return pipe 31 that connects the circulation pipe 30 downstream of the water-refrigerant heat exchanger and the intermediate part in the tank 3, and an upstream portion of the water-refrigerant heat exchanger. An intermediate part take-out pipe 32 that connects the circulation pipe 30 and the intermediate part in the tank 3 is connected.

  The intermediate part return pipe 31 is a flow path through which water heated by the heat pump unit 1 is returned to the intermediate part in the tank 3. A switching valve 12 is provided at the connection between the circulation pipe 30 and the intermediate return pipe 31. A pre-tank thermistor 21 that detects the water temperature before the tank inflow is provided on the upstream side of the switching valve 12. The switching valve 12 allows the hot water heated by the water-refrigerant heat exchanger to flow to the upper part in the tank 3 or the intermediate part in the tank 3 according to the water temperature detected by the thermistor 21 before entering the tank. Inflow point switching means. The intermediate portion extraction pipe 32 is a flow path that passes when water (medium temperature water) stored in the intermediate portion in the tank 3 is extracted. A switching valve 8 is provided at the junction of the circulation pipe 30 and the intermediate part extraction pipe 32. The switching valve 8 is tank outflow point switching means that can switch the extraction of the water in the tank 3 from the lower part in the tank 3 or the intermediate part in the tank 3.

  The tank 3 is connected to a hot water supply pipe (not shown) that causes the hot water in the high temperature water section in the upper part of the tank 3 to flow out to the hot water supply use side terminal. The hot water supply piping communicates with showers, currants, hand-washing taps, bath tubs, etc. The hot water supply pipe is connected to the hot water supply functional part 5, and a part thereof is included in the hot water supply functional part 5.

  The hot water supply functional part 5 is configured by, for example, a form in which a solenoid valve, a flow rate counter, a check valve, various thermistors, a flowing water switch, a pump, and the like and piping connecting them are integrated. This hot water supply functional part 5 can be configured as a box-shaped unit component in which the pipe length is shortened as much as possible to reduce pressure loss and flow path resistance. The hot water supply functional part 5 is arranged in a dead space radially outward on the side surface of the tank 3 in the vicinity of the corner and the inner wall surface in the housing 2. Moreover, the hot water supply functional part 5 can be configured by forming each hot water supply functional part, piping, and the like with a resin material, and can be reduced in weight to improve workability and maintainability.

  Here, the hot water supply functional component is a component disposed on the flow path having the function of controlling the flow of hot water supply water, and stops the flow of the fluid, changes the flow direction, and controls the pressure in the pipe. Or a driving part such as a pump for forcibly moving the fluid, or a device for heating the fluid.

  The heat exchanger 7 used as the temperature adjusting means includes a primary side heat exchange channel provided in the middle of the primary side pipe 33 through which the primary side fluid (water for hot water supply) in the extracted tank 3 flows, The secondary side heat exchange flow path provided in the middle of the secondary side piping 34 communicating with the flow path 4b of the means is included inside as a flow path for exchanging heat with each other. The primary side pipe 33 includes a portion of the circulation pipe 30 located before the primary side fluid flowing out of the tank 3 flows into the water-refrigerant heat exchanger of the heat pump unit 1 before heat exchange, and water-refrigerant heat. A flow path that connects the post-heat exchange portion of the circulation pipe 30 located until the primary fluid flowing out of the exchanger flows into the tank 3 is formed.

  The primary-side circulation circuit is a circuit mainly composed of the circulation pipe 30 and the primary-side pipe 33. The inside of the tank 3, the switching valve 8, the pump 9, the switching valve 10, the heat exchanger 7, and the switching valve 11, a switching valve 12, and a circuit through which the primary fluid flows in the order of the inside of the tank 3. A primary side inlet thermistor 22 that detects the temperature of the primary side fluid before flowing into the heat exchanger 7 is provided in the primary side piping 33 upstream of the primary side heat exchange flow path. .

  A switching valve 10 is provided at a portion of the circulation pipe 30 before heat exchange. The switching valve 10 is a heat exchange switching means capable of switching whether the water in the tank 3 is exchanged through the heat exchanger 7 or not through the heat exchanger 7. It is. A switching valve 11 is provided at the site of the circulation pipe 30 after heat exchange. The switching valve 11 can switch whether the water that has passed through the heat exchanger 7 is sent into the tank 3 after passing through the heat pump unit 1 or sent into the tank 3 without going through the heat pump unit 1. Inflow path switching means.

  The secondary side pipe 34 constitutes a circulation flow path that connects the outflow part and the inflow part of the flow path 4b of the power storage means. The secondary side fluid (brine) of the flow path 4b is sealed in advance in the secondary side pipe 34 or the like, and the secondary side pipe 34 is driven by the driving force of the pump 14 provided in the middle of the secondary side pipe 34. Is forced to circulate. The secondary-side circulation circuit is a circuit that is mainly configured by the secondary-side piping 34 and in which the fluid passing through the power storage means 4 circulates. The flow path 4 b of the power storage means, the switching valve 13, the heat exchanger 7, and the pump 14. The secondary fluid flows in the order of the switching valve 15 and the flow path 4b of the power storage means. A secondary-side inlet thermistor 24 that detects the temperature of the secondary-side fluid before flowing into the heat exchanger 7 is provided at the inlet of the secondary-side heat exchange channel of the heat exchanger 7. A secondary-side outlet thermistor 25 that detects the temperature of the secondary-side fluid that has flowed out of the heat exchanger 7 is provided at the outlet of the secondary-side heat exchange channel of the heat exchanger 7.

  This hot water supply system includes at least a power conditioner system 6 (hereinafter referred to as PCS 6) as charge / discharge control means for controlling charge / discharge of the power storage means 4. The PCS 6 is configured to function as charge / discharge control means for controlling charge / discharge of the power storage means 4 and to control the operation of other devices. The PCS 6 is surrounded by a flow path 6a through which the secondary side fluid flows, and transfers heat to the secondary side fluid that flows through the flow path 6a. The PCS 6 is provided on the side of the tank 3 and the power storage means 4 in the housing 2 and is particularly susceptible to the heat released from the tank 3. The PCS 6 is provided with a PCS thermistor 26 that detects its surface temperature.

  A PCS side pipe 35 communicating with the flow path 6a is connected to the secondary side pipe 34. The PCS side pipe 35 includes a portion of the secondary side pipe 34 that is positioned before the secondary side fluid that has flowed out of the heat exchanger 7 flows into the flow path 4b of the power storage means, and a portion of the flow path 4b. A flow path that connects the portion of the secondary side pipe 34 located at the outlet to the portion after the power storage means is configured. Thus, since the flow path 6a of the PCS 6 is disposed in the middle of the PCS side pipe 35, it is connected in parallel with the flow path 4b of the power storage means.

  A switching valve 15 is provided at a portion of the secondary side pipe 34 before the power storage means. The switching valve 15 can switch whether the secondary fluid heat-exchanged by the heat exchanger 7 is allowed to flow only to the power storage means 4, only to the PCS 6, or to both the power storage means 4 and the PCS 6. It is a temperature adjustment object switching means. A switching valve 13 is provided at a portion of the secondary side pipe 34 after the power storage means. The switching valve 13 is a temperature adjustment target switching means that operates in conjunction with the switching valve 15. When the flow path in the secondary side pipe 34 and the flow path in the PCS side pipe 35 are brought into communication, When the passage on the PCS side piping 35 is opened and the flow path in the PCS side piping 35 is closed, the passage on the PCS side piping 35 is closed and only the passage on the secondary side piping 34 side is provided. To be released.

  The system control apparatus 100 is mainly composed of a microcomputer, and a preset control program or an updatable control program is provided in a ROM or RAM built in as a storage means. The system control device 100 acquires temperature information detected by each thermistor 20, 21, 22, 23, 24, 25, and based on the result of calculating a predetermined program using these temperature information, each switching valve The operation of 8, 10, 11, 12, 13, 14 and pumps 9, 14 is controlled.

  Next, the flow of fluid in each state of the hot water supply system configured as described above will be described with reference to FIG. 2-7 is the schematic diagram which showed the flow of the fluid of each state in this hot water supply system. In FIG. 2 to FIG. 7, only the components related to the flow of the fluid are shown for easy understanding, the piping through which the fluid flows is shown by a solid line, and the piping through which the fluid does not flow is shown by a broken line. .

  First, FIG. 2 shows a state in the initial stage of the boiling operation by the heat pump unit 1. In this state, the water accumulated in the lower part of the tank 3 flows out into the circulation pipe 30 by the driving force of the pump 9 and is heated by the water-refrigerant heat exchanger of the heat pump unit 1 and then returned to the intermediate part. It returns to the middle part in the tank 3 through the pipe 31. The flow of the primary fluid at this time is as follows: the lower part in the tank 3, the switching valve 8, the pump 9, the switching valve 10, the heat pump unit 1, the switching valve 11, the switching valve 12, the intermediate return pipe 31, and the intermediate in the tank 3. It becomes part order. Further, the secondary fluid is not driven and no flow is formed.

  Next, FIG. 3 shows a boiling operation state in which the boiling operation proceeds more than in FIG. 2 and hot water heated to the target temperature is supplied into the tank 3. In this state, the water accumulated in the lower part of the tank 3 flows out into the circulation pipe 30 by the driving force of the pump 9 and is heated to the target temperature by the water-refrigerant heat exchanger of the heat pump unit 1. Subsequently, the water returns to the upper part of the tank 3 through the circulation pipe 30 as high-temperature water. At this time, the primary fluid flows through the circulation pipe 30 in the order of the lower part in the tank 3, the switching valve 8, the pump 9, the switching valve 10, the heat pump unit 1, the switching valve 11, the switching valve 12, and the upper part in the tank 3. . Further, the secondary fluid is not driven and no flow is formed.

  Next, FIG. 4 shows the state of the cooling operation for cooling the power storage means 4. The system control device 100 executes this state control when the temperature of the battery 4a is higher than a predetermined temperature range. The predetermined temperature range is an efficient temperature range for charging and discharging the battery 4a, and is stored in the system controller 100 in advance. In this state, the low temperature primary fluid accumulated in the lower part of the tank 3 flows into the circulation pipe 30 by the driving force of the pump 9, and the passage on the primary pipe 33 side is fully opened by the switching valve 10. In this state, the passage on the side of the circulation pipe 30 is fully closed, so that it flows into the primary side pipe 33. The primary side fluid passes through the primary side heat exchange flow path of the heat exchanger 7, travels through the primary side piping 33, and switches to the tank through the intermediate return pipe 31 by switching the switching valves 11 and 12. Return to the middle part in 3. The primary fluid during the cooling operation is the lower part in the tank 3, the switching valve 8, the pump 9, the switching valve 10, the heat exchanger 7, the switching valve 11, the switching valve 12, the intermediate return pipe 31, and the tank 3. It flows through the cooling circuit in the order of the middle part. In addition, when the temperature of the fluid before the tank inflow detected by the thermistor 21 before the tank inflow is 65 ° C. or more, the passage on the circulation pipe 30 side is opened to 100% by the switching valve 12 and the primary side fluid is supplied to the tank. Return to the upper part instead of the middle part in 3.

  On the other hand, the secondary side fluid flows out from the flow path 4b of the power storage means into the secondary side pipe 34 by the driving force of the pump 14, and the passage on the secondary side pipe 34 side is fully opened by the switching valve 13, When the passage on the PCS side pipe 35 side is fully closed, it further flows in the secondary side pipe 34. The secondary side fluid flows into the secondary side heat exchange flow path of the heat exchanger 7, where it dissipates heat to the primary side fluid flowing through the primary side heat exchange flow path, and the secondary side fluid. Heat transfer from to the primary fluid occurs and is cooled. The cooled secondary fluid proceeds in the secondary piping 34 opened by the switching valve 15 and returns to the flow path 4b of the power storage means. Here, the battery 4a dissipates heat to the cooled secondary fluid that flows around it, and heat transfer from the battery 4a to the secondary fluid occurs to cool the battery. The secondary fluid during the cooling operation flows through the secondary side pipe 34 in the order of the flow path 4b of the power storage means, the switching valve 13, the heat exchanger 7, the pump 14, the switching valve 15, and the flow path 4b of the power storage means. . By repeating the primary side flow and the secondary side flow described above, the temperature of the battery 4a is lowered and adjusted to a predetermined temperature range, and the environment is controlled so that highly efficient charge and discharge can be performed. The

  Next, FIG. 5 shows a state during a heating operation in which the power storage means 4 is heated. The system control device 100 executes this state control when the temperature of the battery 4a is lower than a predetermined temperature range. In this state, the battery 4a is heated using the intermediate temperature primary fluid accumulated in the intermediate portion of the tank 3. The intermediate temperature primary side fluid flows into the intermediate take-out pipe 32 by switching the driving force of the pump 9 and the switching valve 8, and the passage on the primary side piping 33 side is fully opened by the switching valve 10 to circulate. When the passage on the side of the pipe 30 is fully closed, it flows into the primary side pipe 33. The primary side fluid passes through the primary side heat exchange flow path of the heat exchanger 7, travels through the primary side piping 33, and switches to the tank through the intermediate return pipe 31 by switching the switching valves 11 and 12. Return to the middle part in 3. The flow of the primary side fluid during the heating operation is as follows: the intermediate part in the tank 3, the switching valve 8, the pump 9, the switching valve 10, the heat exchanger 7, the switching valve 11, the switching valve 12, and the intermediate part return pipe 31. The order of the middle part in the tank 3 is the order. Also in this case, when the temperature of the fluid before the tank inflow detected by the thermistor 21 before the tank inflow is 65 ° C. or more, the switching valve 12 is controlled so that the primary side fluid is not in the middle portion in the tank 3. Return to the top.

  On the other hand, the secondary fluid flows in the cooling circuit as in FIG. Then, the secondary side fluid flows into the secondary side heat exchange channel of the heat exchanger 7, where it absorbs heat from the primary side fluid flowing through the primary side heat exchange channel, and 2 from the primary side fluid. Heat transfer to the secondary fluid occurs and warms up. The heated secondary fluid proceeds in the secondary piping 34 opened by the switching valve 15 and returns to the flow path 4b of the power storage means. Here, the battery 4a absorbs heat from the heated secondary fluid flowing around, and heat is transferred from the secondary fluid to the battery 4a to be warmed. By repeating the primary side flow and the secondary side flow described above, the temperature of the battery 4a rises and is adjusted to a predetermined temperature range, and is controlled in an environment where high-efficiency charging / discharging can be performed. The

  Next, FIG. 6 shows a state in the cooling operation for cooling the PCS 6. The system control device 100 executes this cooling operation control when the temperature of the PCS 6 is higher than a predetermined temperature. This is because if the operation is continued at a temperature higher than the predetermined temperature, the PCS 6 is deteriorated. The predetermined temperature is stored in the system controller 100 in advance. In the cooling operation state, the primary fluid flows through the cooling circuit as in FIG. Also in this case, when the temperature of the fluid before the tank inflow detected by the thermistor 21 before the tank inflow is 65 ° C. or more, the switching valve 12 is controlled so that the primary side fluid is not in the middle portion in the tank 3. Return to the top.

  On the other hand, the secondary side fluid flows out from the flow path 6 a of the PCS 6 into the PCS side piping 35 by the driving force of the pump 14, and flows into the secondary side piping 34 by the switching valve 13. The secondary side fluid flows into the secondary side heat exchange channel of the heat exchanger 7, where it dissipates heat to the low temperature primary side fluid that flows through the primary side heat exchange channel. Heat transfer from the side fluid to the primary fluid occurs and is cooled. The cooled secondary fluid proceeds in the PCS side pipe 35 opened by the switching valve 15 and returns to the flow path 6a of the PCS 6. Here, the PCS 6 dissipates heat to the cooled secondary fluid flowing around it, and heat is transferred from the PCS 6 to the secondary fluid to be cooled. The secondary fluid in this case flows through the PCS side circulation circuit in the order of the flow path 6a of the PCS 6, the switching valve 13, the heat exchanger 7, the pump 14, the switching valve 15, and the flow path 6a of the PCS 6. By repeating the flow on the primary side and the flow on the secondary side as described above, the temperature of the PCS 6 is lowered and adjusted to a predetermined temperature range, and deterioration of the PCS 6 can be prevented.

  Next, FIG. 7 shows a state during a cooling operation in which both the power storage means 4 and the PCS 6 are simultaneously cooled. The system control device 100 executes this state control when the temperature of the battery 4a is higher than the predetermined temperature range and the temperature of the PCS 6 is higher than the predetermined temperature. In the cooling operation state, the primary fluid flows in the same manner as in FIG. Also in this case, when the temperature of the fluid before the tank inflow detected by the thermistor 21 before the tank inflow is 65 ° C. or more, the switching valve 12 is controlled so that the primary side fluid is not in the middle portion in the tank 3. Return to the top.

  On the other hand, for the secondary side fluid, both the passage on the secondary side pipe 34 side and the passage on the PCS side pipe 35 side are fully opened by the switching valve 13, and the driving force of the pump 14 causes the power storage means A flow that flows out from the flow path 4 b into the secondary side pipe 34 and a flow that flows out from the flow path 6 a of the PCS 6 into the PCS side pipe 35 occur, and merges at the switching valve 13 and flows into the secondary side pipe 34. . The combined flow flows into the secondary heat exchange flow path of the heat exchanger 7, where it dissipates heat to the low temperature primary fluid flowing through the primary heat exchange flow path, and the secondary side. Heat transfer from the fluid to the primary fluid occurs and is cooled. The cooled secondary fluid is divided into the passage on the power storage means 4 side and the passage on the PCS 6 side opened by the switching valve 15 and returns to the flow path 4 b of the power storage means and the flow path 6 a of the PCS 6. Here, the battery 4a and the PCS 6 dissipate heat to the cooled secondary fluid flowing around them, and are cooled respectively. By repeating the above-described primary-side flow and secondary-side flow, the temperatures of the power storage means 4 and the PCS 6 are lowered and adjusted to a predetermined temperature range and a predetermined temperature, respectively.

  Next, control for adjusting the temperature of the power storage unit 4 in the hot water supply system will be described. FIG. 8 is a main flowchart showing an example of temperature adjustment control of the power storage means 4. This hot water supply system adjusts the temperature of the power storage means 4 in parallel with the operation of boiling normal hot water stored using midnight time zone power, or at different times. Each process in the flowchart relating to the temperature adjustment of the power storage unit 4 is executed by the system control device 100. In addition, the specific numerical value of the temperature described in a flowchart is only an example, and in this embodiment, in order to charge / discharge a battery, it demonstrates based on the case where the predetermined temperature range efficient is 25 to 40 degreeC. To do.

  First, in step 10, it is determined whether or not the state of the power storage means 4 is either before charging or before discharging. If it is determined in step 10 that the battery is either before charging or discharging, then in step 20, it is determined whether the temperature of the battery 4a detected by the battery thermistor 23 is 20 ° C. or less. If the temperature exceeds 20 ° C., the process returns to step 10 again.

  If it is determined in step 20 that the temperature of the battery 4a is 20 ° C. or lower, a heating operation for heating the battery 4a in the low temperature state is started, and this operation is controlled (step 30). In this heating operation control, the flow of the primary side fluid leads the medium temperature water accumulated in the intermediate portion in the tank 3 to the heat exchanger 7, and does not flow to the water-refrigerant heat exchanger of the heat pump unit 1. The flow of the secondary side fluid is controlled so that the brine in the flow path 4b of the power storage means is guided to the heat exchanger 7 and returned to the flow path 4b of the power storage means again. That is, the fluid flow shown in FIG. 5 is formed.

  In this heating operation control, for example, the primary pump 9 is adjusted so that the temperature at the outlet of the heat exchanger 7 detected by the secondary outlet thermistor 25 becomes the upper limit (40 ° C.) of a predetermined temperature range. Control the number of revolutions. Thus, when the temperature at the outlet of the heat exchanger 7 is set to a high temperature, the temperature of the secondary fluid rises and the temperature of the battery 4a also rises. This heating operation control is continued until the temperature of the battery 4a becomes 25 ° C. or higher. If it determines with the temperature of the battery 4a being 25 degreeC or more by step 40, each part will be controlled to stop a heating operation (step 50), and it will return to the process of step 10 again.

  On the other hand, if it is determined in step 10 that it is neither before charging nor before discharging, it is next determined whether or not the state of the power storage means 4 is either charging or discharging (step 60). If it is determined that neither charging nor discharging is in progress, the process returns to step 10 again. If it is determined in step 60 that neither charging nor discharging is in progress, it is determined in step 70 whether or not the temperature of the battery 4a is 25 ° C. or more and 40 ° C. or less, which is an example of a predetermined temperature range. If the temperature of 4a is within this predetermined temperature range, the temperature control operation is not performed and the process returns to step 10 again.

  If it is determined that the temperature of the battery 4a is not within the predetermined temperature range, in order to allow the battery 4a to exhibit a desired charge / discharge efficiency, control of the temperature adjustment operation is executed in step 80. FIG. 9 is a subroutine of temperature adjustment operation control in the main flowchart of FIG.

  In the temperature adjustment operation control, first, in step 81, it is determined whether the temperature of the battery 4a falls below a lower limit value (20 ° C.) or exceeds an upper limit value (40 ° C.) of a predetermined temperature range. When it is determined that the temperature of the battery 4a exceeds the upper limit value of the predetermined temperature range, the cooling operation described with reference to FIG. 4 is performed. In the cooling operation, first, a cooling circuit operation in which the primary fluid flows through the cooling circuit is performed (step 82). Then, the battery-side circulation circuit operation is performed in which the secondary-side fluid flows through the battery-side circulation circuit that circulates through the flow path 4b of the power storage means and the heat exchanger 7 (step 83). The rotational speed of the secondary pump 14 at this time is controlled to a constant value. As a result, the primary fluid and the secondary fluid exchange heat when passing through the heat exchanger 7, and the secondary fluid having a high temperature dissipates heat to the primary fluid and is cooled.

  At this time, in step 84, the primary pump 9 is controlled as follows so that the temperature of the battery 4a falls within a predetermined temperature range. That is, the rotation speed of the primary pump 9 is such that the temperature of the battery 4a detected by the battery thermistor 23 is within a predetermined temperature range while monitoring the temperature of the outlet of the heat exchanger 7 detected by the secondary outlet thermistor 25. Feedback control is performed until the temperature reaches 25 ° C. or more and 40 or less. If it is determined in step 85 that the temperature of the battery 4a is within a predetermined temperature range (25 ° C. or higher and 40 or lower), this control is terminated.

  On the other hand, if it is determined in step 81 that the temperature of the battery 4a is lower than the lower limit (25 ° C.) of the predetermined temperature range, the heating operation described with reference to FIG. 5 is performed. In the heating operation, first, the heating circuit operation in which the primary fluid flows through the cooling circuit is performed (step 86). Then, a battery-side circulation circuit operation is performed in which the secondary-side fluid flows through the battery-side circulation circuit in which the storage fluid passage 4b and the heat exchanger 7 are circulated (step 87). As a result, the primary fluid and the secondary fluid exchange heat when passing through the heat exchanger 7, and the secondary fluid having a low temperature absorbs heat from the primary fluid and is warmed.

  At this time, in step 88, the primary pump 9 is controlled as follows so that the temperature of the battery 4a falls within a predetermined temperature range. That is, the rotational speed of the primary pump 9 is feedback controlled in the same manner as in step 84 described in the cooling operation (step 88). And if it determines with the temperature of the battery 4a being a predetermined temperature range (25 degreeC or more and 40 or less) in step 89, this control will be complete | finished.

  Next, control for cooling the PCS 6 to adjust the temperature will be described. FIG. 10 is a main flowchart illustrating an example of cooling control of the PCS 6. The temperature adjustment control of the PCS 6 is performed in parallel with the operation of boiling the normal hot water that is performed by using the midnight time zone power, or at the same time as the temperature adjustment control of the power storage means 4. Further, the temperature adjustment control of the PCS 6 may be performed simultaneously with the temperature adjustment control of the power storage unit 4 as described above with reference to FIG. 7, or may be performed independently as described above with reference to FIG. Each process in the flowchart relating to the temperature adjustment of the PCS 6 is executed by the system control apparatus 100.

  First, in step 100, it is determined whether or not the temperature of the PCS 6 detected by the PCS thermistor 26 exceeds 80 ° C. If the temperature of the PCS 6 is less than 80 ° C, it is not necessary to cool the PCS 6; The temperature control is terminated without performing temperature control.

  If it is determined in step 100 that the temperature of the PCS 6 exceeds 80 ° C., the cooling operation described above with reference to FIG. 6 is performed. In this cooling operation, first, a cooling circuit operation in which the primary fluid flows through the cooling circuit is performed (step 110). Then, the PCS side circulation circuit operation is performed in which the secondary side fluid flows through the PCS side circulation circuit in which the flow path 6a of the PCS 6 and the heat exchanger 7 are circulated (step 120). The rotational speed of the secondary pump 14 at this time is controlled to a constant value. As a result, the primary fluid and the secondary fluid exchange heat when passing through the heat exchanger 7, and the secondary fluid having a high temperature dissipates heat to the primary fluid and is cooled.

  At this time, in step 130, the primary pump 9 is controlled as follows so that the temperature of the PCS 6 falls within a predetermined temperature range (60 ° C. or higher and 80 or lower) in which deterioration is not promoted. That is, the rotational speed of the primary pump 9 is feedback controlled until the temperature of the PCS 6 detected by the PCS thermistor 26 falls within a predetermined temperature range (60 ° C. or more and 80 or less). If it is determined in step 140 that the temperature of the PCS 6 is within the predetermined temperature range, this control is terminated.

  Further, when the temperature adjustment control of the PCS 6 and the temperature adjustment control of the power storage means 4 are performed in parallel, the rotation speed of the primary pump 9 in step 130 is performed by the temperature adjustment control of the PCS 6, and the heat exchanger 7 outlet You may adjust both the temperature of PCS6 and the temperature of the battery 4a simultaneously by adjusting the opening degree of the switching valve 13, monitoring temperature.

  The hot water supply system is a device installed outside a house eaves or a veranda of an apartment house, for example, like an outdoor unit of a home air conditioner. And when this kind of apparatus is installed in a confined area such as under a house eaves or on a veranda, it is arranged in such a direction that the depth direction becomes thinner.

  The housing | casing 2 is a box which comprises the outer shell of the principal part of this hot-water supply system, and is a container which is enclosed by the top | upper surface, the side surface, the back surface, the front surface, and the bottom part, and the heat pump side is open | released. At the bottom of the housing 2, a leg 2 a that extends downward in the vertical direction is provided. The leg 2a is fixed to the foundation for installation with an anchor bolt or the like.

  Inside the housing 2, a tank 3, a power storage means 4, and a PCS 6 are accommodated, and these are arranged in the same closed space. For this reason, since the heat released from the tank 3 stays in the closed space, the air temperature in this space rises to warm the power storage means 4 and the PCS 6 and raise the temperature of the power storage means 4 and the PCS 6. Thereby, the power storage means 4 and the PCS 6 can be further heated by a synergistic effect combined with the use of the heat storage of the fluid in the tank 3, which is particularly useful in the winter in a cold district.

  The effects brought about by the hot water supply system according to the present embodiment will be described below. The hot water supply system includes a heat pump unit 1 that heats a fluid used for supplying hot water, a tank 3 that stores the fluid heated by the heat pump unit 1, and a power storage unit 4 that includes a plurality of batteries 4a that perform charging and discharging. And a heat exchanger 7 which is an example of temperature adjusting means for adjusting the temperature of the battery 4a by moving the amount of heat of the fluid by circulating the fluid in the tank 3.

  According to this structure, the fluid in the tank 3 used for supply of hot water supply water can be used for temperature adjustment of the battery 4a through the heat exchanger 7 serving as temperature adjustment means. As a result, the amount of heat stored in the tank 3 is effectively utilized for both hot water supply and ensuring charging / discharging efficiency, so that not only the charging / discharging efficiency of the battery is improved, but also the energy saving of the entire system can be achieved.

(Second Embodiment)
The hot water supply system according to the second embodiment is obtained by eliminating the intermediate return pipe 31 and the intermediate takeout pipe 32 from the hot water supply system according to the first embodiment, and replaces the intermediate takeout pipe 32 with an upper tank takeout pipe. It is a modification provided with 32A. Moreover, the switching valve 12 is also abolished because the intermediate return pipe 31 is not provided. FIG. 11 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment.

  As shown in FIG. 11, the hot water supply system can supply the hot water for hot water existing in the upper part of the tank 3 to the heat exchanger 7 when performing the heating operation shown in FIG. For this reason, the effect which heats the battery 4a is large, the battery 4a can be heated rapidly, and the efficiency of charging / discharging of the battery 4a can further be improved.

(Third embodiment)
The hot water supply system of the third embodiment is a modification in which the PCS 6 is abolished with respect to the hot water supply system of the second embodiment. Further, since the PCS 6 is not provided, the PCS side pipe 35, the switching valve 13 and the switching valve 15 are also abolished. FIG. 12 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same operational effects as the hot water supply system of the second embodiment.

(Fourth embodiment)
The hot water supply system of the fourth embodiment is a modification in which the PCS 6 is abolished with respect to the hot water supply system of the first embodiment. Further, since the PCS 6 is not provided, the PCS side pipe 35, the switching valve 13 and the switching valve 15 are also abolished. FIG. 13 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same effects as the hot water supply system of the first embodiment, except that the configuration for cooling the PCS 6 is not provided.

(Fifth embodiment)
The hot water supply system of the fifth embodiment is a modification in which the heat exchanger 7 is abolished with respect to the hot water supply system of the third embodiment. Further, since the heat exchanger 7 is not provided, the method of adjusting the temperature of the battery 4a by heat exchange between the primary side fluid and the secondary side fluid is not adopted, and the water in the tank 3 is directly stored in the power storage means. The battery 4a is directly cooled and heated by flowing through the flow path 4b. FIG. 14 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment.

  As shown in FIG. 14, the hot water supply system is provided with a first pipe that is provided so as to send the fluid in the lower part of the tank 3 to the upper part in the tank 3 through the flow path 4 b of the power storage means by the driving force of the pump 9. Temperature control pipe 36 and a second temperature control pipe 37 provided so as to send the fluid in the upper part of the tank 3 to the lower part of the tank 3 through the flow path 4b of the storage means by the driving force of the pump 9. And. The first temperature control pipe 36 constitutes a tank circulation circuit in which the fluid in the tank 3 is forcedly circulated through the power storage means. Further, the second temperature adjustment pipe 37 and the first temperature adjustment pipe 36 and the circulation pipe 30 constitute a tank circulation circuit in which the fluid in the tank 3 is forcedly circulated through the power storage means.

  The first temperature control pipe 36 is a pipe that connects the circulation pipe 30 where the fluid flowing in the circulation pipe 30 flows out of the pump 9 and the upper part in the tank 3 via the flow path 4b of the storage means. . Due to the configuration of the first temperature control pipe 36, the lower part in the tank 3, the circulation pipe 30, the first temperature control pipe 36, the flow path 4 b of the power storage means, the first temperature control pipe 36, and the upper part in the tank 3. In this order, a circulation path through which the fluid inside the tank 3 circulates is formed (path indicated by a solid line arrow in FIG. 14). This circulation path constitutes a cooling circuit, and the fluid flowing through the circulation path cools the battery 4a in the cooling operation.

  The second temperature adjustment pipe 37 is a pipe that connects the first temperature adjustment pipe 36 and the circulation pipe 30 at a position located before the fluid flowing in the circulation pipe 30 flows into the pump 9. With the configuration of the second temperature adjustment pipe 37, the upper part in the tank 3, the first temperature adjustment pipe 36, the flow path 4 b of the power storage means, the first temperature adjustment pipe 36, the second temperature adjustment pipe 37, the circulation A circulation path through which the fluid in the tank 3 circulates is formed in the order of the pipe 30 and the upper part in the tank 3 (path indicated by broken line arrows in FIG. 14). This circulation path constitutes a heating circuit, and the fluid flowing through the circulation path warms the battery 4a in the heating operation.

  A switching valve 8 </ b> A is provided at a site where the circulation pipe 30 and the second temperature control pipe 37 are connected upstream of the pump 9. The switching valve 8A is circuit switching means that can switch between a cooling circuit and a heating circuit. A switching valve 10 </ b> A is provided at a site where the circulation pipe 30 and the first temperature control pipe 36 are connected downstream of the pump 9. The switching valve 10A is switching means that can switch between flowing the fluid that has flowed out of the pump 9 through the first temperature control pipe 36 or continuing through the circulation pipe 30, and together with the switching valve 8A, the cooling circuit and the heating It also contributes to switching with the circuit.

  The temperature adjusting means in the hot water supply system is a cooling circuit and a heating circuit, and each circuit is provided with each component that contributes to the flow of fluid.

  Next, a cooling operation for cooling the power storage unit 4 will be described. In the cooling operation, the low-temperature fluid accumulated in the lower part of the tank 3 flows into the circulation pipe 30 by the driving force of the pump 9, and the passage on the circulation pipe 30 side is fully opened by the switching valve 8A. The passage on the temperature control pipe 37 side of 2 is fully closed to flow into the pump 9.

  The low-temperature fluid is first opened by the switching valve 10A so that the passage on the first temperature adjustment pipe 36 side is fully opened, and the passage on the circulation pipe 30 side is fully closed. Flows into the flow path 4b of the power storage means. Here, since the low-temperature fluid absorbs heat from the battery 4a having a higher temperature, heat transfer from the battery 4a to the fluid occurs, and the battery 4a is cooled. The fluid whose temperature has risen due to the removal of heat from the battery 4 a flows out from the flow path 4 b of the power storage means, passes through the first temperature adjustment pipe 36, and returns from the upper part of the tank 3 to the inside of the tank 3. During this cooling operation, the low-temperature fluid in the tank 3 passes through the cooling circuit in the order of the lower part in the tank 3, the switching valve 8A, the pump 9, the switching valve 10A, the flow path 4b of the storage means, and the upper part in the tank 3. Flowing. By repeating the flow of circulating through the cooling circuit described above, the temperature of the battery 4a is lowered and adjusted to a predetermined temperature range, and the environment is controlled so that highly efficient charging / discharging can be performed.

  Next, a heating operation for heating the power storage unit 4 will be described. In the heating operation, the high-temperature fluid in the upper part of the tank 3 flows into the first temperature control pipe 36 by the driving force of the pump 9 and the passage of the switching valve 8A and the switching valve 10A, and flows into the first temperature control pipe 36. It flows to the path 4b. At this time, the switching valve 8A is controlled so as to communicate the passage of the second temperature adjustment pipe 37 and the passage of the circulation pipe 30 on the pump 9 side, and the switching valve 10A fully opens the passage on the circulation pipe 30 side. The passage on the first temperature adjustment pipe 36 side is controlled to be fully closed. Since the high-temperature fluid that has flowed into the flow path 4b of the power storage means dissipates heat to the battery 4a having a low temperature, heat transfer from the fluid to the battery 4a occurs, and the battery 4a is warmed. The fluid whose temperature has dropped due to the release of heat to the battery 4a flows out from the flow path 4b of the power storage means, passes through the second temperature adjustment pipe 37, and further passes through the circulation pipe 30 to the inside of the tank 3 from the upper part of the tank 3. Come back to.

  The high-temperature fluid in the tank 3 at the time of this heating operation is the upper part in the tank 3, the flow path 4b of the power storage means, the switching valve 8A, the pump 9, the switching valve 10A, the water-refrigerant heat exchanger of the heat pump unit 1, It flows through the heating circuit in the order of the upper part in the tank 3. By repeating the flow of circulating through the above heating circuit, the temperature of the battery 4a rises and is adjusted to a predetermined temperature range, and the environment is controlled so that highly efficient charging and discharging can be performed.

  The effects brought about by the hot water supply system according to the present embodiment will be described below. In the hot water supply system, the temperature of the battery 4a can be adjusted by temperature adjusting means that does not include the heat exchanger 7. For this reason, a hot water supply system can be constructed with a simple configuration, and the system can be miniaturized.

(Sixth embodiment)
The hot water supply system of the sixth embodiment further includes a tank inflow portion switching means similar to that in FIG. 1 and a tank inflow / outflow portion switching means for the flow path 4b of the power storage means with respect to the hot water supply system of the fifth embodiment. It is a modification. FIG. 15 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment.

  The tank inflow portion switching means is a means capable of switching whether the water in the tank 3 is returned to the upper part in the tank 3 or returned to the intermediate part after heat exchange by the power storage means 4 or heating by the heat pump unit 1. . The tank inflow portion switching means includes a switching valve 12 for switching whether the flow toward the tank 3 is continuously sent to the circulation pipe 30 or to the intermediate return pipe 31, and a thermistor 21 before tank inflow. When the water temperature detected by the thermistor 21 before entering the tank is an intermediate temperature (for example, in a range of 30 to 60 ° C.), the switching valve 12 is sent to the intermediate return pipe 31 and returned to the intermediate portion in the tank 3 to obtain a high temperature (over 60 ° C. ), It is controlled so that it is sent back to the circulation pipe 30 and returned to the upper part in the tank 3.

  The tank inflow / outflow switching unit switches whether to return the fluid that has flowed out of the flow path 4b of the power storage unit during the cooling operation to the upper part of the tank 3 or to the intermediate part according to the battery temperature detected by the battery thermistor 23. And a means capable of switching between taking out the fluid flowing into the flow path 4b of the power storage means from the upper part in the tank 3 or taking it out from the intermediate part during the heating operation. The tank inflow / outflow switching unit includes a first temperature adjustment pipe 36, a second temperature adjustment pipe 37, a third temperature adjustment pipe 38, and the switching valve 16.

  The third temperature adjustment pipe 38 is a pipe that connects the first temperature adjustment pipe 36 in a portion located between the upper part in the tank 3 and the power storage means 4 and the intermediate part in the tank 3. The switching valve 16 is provided at a connection portion between the third temperature adjustment pipe 38 and the first temperature adjustment pipe 36, and switches the flow path.

  In the cooling operation, the low-temperature fluid accumulated in the lower part of the tank 3 flows out into the circulation pipe 30 by the driving force of the pump 9, and the passage on the circulation pipe 30 side by the switching valve 8A and the first passage by the switching valve 10A. After the passage on the side of the first temperature adjustment pipe 36 is opened, it flows into the pump 9 and then flows through the first temperature adjustment pipe 36 and into the flow path 4b. The low-temperature fluid cools the battery 4 a and rises in temperature, then flows out from the flow path 4 b, passes through the first temperature adjustment pipe 36, and returns to the tank 3. When returning to the tank 3, if the detected temperature of the battery thermistor 23 is medium temperature (for example, in the range of 30 to 60 ° C.), the switching valve 16 opens the passage on the third temperature adjustment pipe 38 side so that If the temperature is high (for example, 60 ° C. or higher), the passage on the first temperature adjustment pipe 36 side is opened by the switching valve 16 and returned to the intermediate portion of the tank 3 (see the solid line arrow in FIG. 15). As described above, since the position to be returned to the tank 3 is controlled according to the temperature of the fluid after heat exchange, the heat storage energy can be effectively used without disturbing the temperature layer formed in the tank 3.

  In the heating operation, when the temperature detected by the battery thermistor 23 is considerably lower than the lower limit value of the predetermined temperature range, it is necessary to quickly raise the temperature of the battery 4a. The passage is opened, and the high-temperature fluid in the upper part of the tank 3 is sent to the flow path 4b (see the broken line arrow in FIG. 15). The high-temperature fluid that has heated the battery 4a in the flow path 4b flows to the circulation pipe 30 via the second temperature adjustment pipe 37 due to the driving force of the pump 9 and the passage secured by the switching valve 8A and the switching valve 10A. The passage is switched by the switching valve 12 to be returned to the middle or upper part in the tank 3 (see the broken line arrow in FIG. 15).

  Further, when the detected temperature of the battery thermistor 23 is higher than the former and is slightly lower than the lower limit value of the predetermined temperature range, the battery 4a may be heated with a small amount of heat. The passage on the temperature control pipe 38 side is opened, and the intermediate temperature fluid in the intermediate portion in the tank 3 is sent to the flow path 4b. As in the case of the former high-temperature fluid, the medium-temperature fluid that has heated the battery 4a in the flow path 4b flows to the circulation pipe 30 via the second temperature adjustment pipe 37, and by switching the passage by the switching valve 12 described above, It returns to the intermediate part in the tank 3 (refer to the broken line arrow in FIG. 15).

(Seventh embodiment)
The hot water supply system of the seventh embodiment is a modification of the hot water supply system of the first embodiment, and is different in that the power storage means 4A is arranged above the tank 3. FIG. 16 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same operational effects as the hot water supply system of the first embodiment. Moreover, this hot water supply system has the same effects as the hot water supply system of the first embodiment, except that the power storage means 4A is not arranged on the side of the tank 3.

  Furthermore, by disposing the power storage means 4 above the tank 3, it becomes easier to receive heat released from the tank 3 in the upper part of the housing 2, and the effect of heating the power storage means 4 with air can be expected.

  Furthermore, unlike the power storage means 4 described above, the power storage means 4A is arranged such that the inflow direction and the outflow direction of the fluid with respect to the flow path 4b are aligned with the extension direction of the flow path 4b between the batteries 4a. The plurality of batteries 4a are arranged so as to be stacked in the lateral direction with a predetermined interval in a state where the longitudinal direction surface thereof is along the vertical direction. Thereby, each flow path 4b between the batteries 4a is provided to extend in the vertical direction. Further, the secondary side pipe 34 and the flow path 4 b are connected at the upper part and the lower part of the power storage means 4. With the above configuration, the fluid that has flowed into the flow path 4b flows along the vertical direction for all the flow paths 4b between the batteries 4a, so there is no uneven flow of fluid in the flow path 4b, and each flow path 4b A substantially uniform flow is formed. Therefore, heat exchange between the fluid and the battery 4a is reliably performed in each battery 4a.

(Eighth embodiment)
The hot water supply system of the eighth embodiment is obtained by eliminating the intermediate return pipe 31 and the intermediate takeout pipe 32 from the hot water supply system of the seventh embodiment, and replaces the intermediate takeout pipe 32 with the tank upper takeout pipe 32. It is a modification provided with 32A. Moreover, the switching valve 12 is also abolished because the intermediate return pipe 31 is not provided. FIG. 17 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same operational effects as the hot water supply system of the second embodiment. Moreover, this hot water supply system has the same effect as the hot water supply system of 2nd Embodiment except that the electrical storage means 4A is not arrange | positioned to the side of the tank 3. FIG.

  As shown in FIG. 17, the hot water supply system can supply hot water for hot water existing in the upper part of the tank 3 to the heat exchanger 7 when performing the heating operation. For this reason, the effect which heats the battery 4a is large, the battery 4a can be heated rapidly, and the efficiency of charging / discharging of the battery 4a can further be improved.

(Ninth embodiment)
The hot water supply system of the ninth embodiment is a modification in which the PCS 6 is abolished with respect to the hot water supply system of the seventh embodiment. Further, since the PCS 6 is not provided, the PCS side pipe 35, the switching valve 13 and the switching valve 15 are also abolished. FIG. 18 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same operational effects as the hot water supply system of the seventh embodiment, except that it does not have a configuration for cooling the PCS 6. Moreover, this hot water supply system has the same effect as the hot water supply system of 4th Embodiment except that the electrical storage means 4A is not arranged on the side of the tank 3.

(10th Embodiment)
The hot water supply system of the tenth embodiment is a modification in which the PCS 6 is abolished with respect to the hot water supply system of the eighth embodiment. Further, since the PCS 6 is not provided, the PCS side pipe 35, the switching valve 13 and the switching valve 15 are also abolished. FIG. 19 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same effects as the hot water supply system of the eighth embodiment, except that it does not have a configuration for cooling the PCS 6. Moreover, this hot water supply system has the same effect as the hot water supply system of 3rd Embodiment except that the electrical storage means 4A is not arrange | positioned to the side of the tank 3. FIG.

(Eleventh embodiment)
The hot water supply system of the eleventh embodiment is a modification in which the heat exchanger 7 is abolished with respect to the hot water supply system of the ninth embodiment. Further, since the heat exchanger 7 is not provided, the method of adjusting the temperature of the battery 4a by heat exchange between the primary side fluid and the secondary side fluid is not adopted, and the water in the tank 3 is directly stored in the power storage means. The battery 4a is directly cooled and heated by flowing through the flow path 4b. FIG. 20 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same effects as the hot water supply system of the ninth embodiment, except that the configuration for cooling the PCS 6 is not provided. Moreover, this hot water supply system has the same effects as the hot water supply system of the sixth embodiment, except that the power storage means 4A is not arranged on the side of the tank 3.

(Twelfth embodiment)
The hot water supply system of the twelfth embodiment is a modification in which the heat exchanger 7 is abolished with respect to the hot water supply system of the tenth embodiment. Further, since the heat exchanger 7 is not provided, the method of adjusting the temperature of the battery 4a by heat exchange between the primary side fluid and the secondary side fluid is not adopted, and the water in the tank 3 is directly stored in the power storage means. The battery 4a is directly cooled and heated by flowing through the flow path 4b. FIG. 21 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same operational effects as the hot water supply system of the tenth embodiment, except that it does not have a configuration for cooling the PCS 6. Moreover, this hot water supply system has the same effects as the hot water supply system of the fifth embodiment, except that the power storage means 4A is not disposed on the side of the tank 3.

(13th Embodiment)
The hot water supply system of the thirteenth embodiment is different from the hot water supply system of the first embodiment in the tank 3 and the secondary fluid after passing through the power storage means 4 and before flowing into the heat exchanger 7. It is the modification provided with the auxiliary | assistant heat exchange means which contacts the primary side fluid before inflow thermally. FIG. 22 is a schematic diagram showing the configuration of the hot water supply system of the present embodiment. This hot water supply system has the same effects as the hot water supply system of the first embodiment except that the heat exchanger 39 is provided.

  As shown in FIG. 22, the auxiliary heat exchanging means includes a primary passage 39 a provided in the middle of the circulation pipe 30 that connects the switching valve 11 and the switching valve 12, the switching valve 13, and the heat exchanger 7. And a secondary side passage 39b provided in the middle of the secondary side pipe 34 communicating with the secondary side heat exchange flow path. And heat exchange is performed between the primary side fluid which flows through the primary side channel | path 39a, and the secondary side fluid which flows through the secondary side channel | path 39b.

  With this configuration, the heat of the secondary fluid circulating in the secondary piping 34 can be applied to the primary fluid before flowing into the tank 3 by the heat exchanger 39. As a result, when the heating operation by the heat pump unit 1 and the operation of the power supply functional unit such as the power storage unit 4 and the PCS 6 are performed simultaneously, the temperature of the primary fluid rises due to heat exchange with the secondary fluid. Therefore, the auxiliary heat exchange means can assist boiling by the heat pump unit 1. Thereby, target boiling temperature can be controlled low and the energy saving of boiling operation can be achieved.

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

  For example, the working refrigerant flowing through the circuit of the heat pump unit 1 is not limited to carbon dioxide, but may be other refrigerants such as Freon.

  Moreover, although the heat pump unit 1 of the said embodiment is based on the supercritical heat pump cycle from which the pressure of a refrigerant | coolant becomes more than a critical pressure, it is not limited to this, The pressure of a refrigerant | coolant is based on the heat pump cycle below a critical pressure. Good thing.

  In each of the hot water supply systems of the first to sixth embodiments and the thirteenth embodiment, the storage means is configured such that the inflow direction and the outflow direction of the fluid with respect to the flow path 4b are the extension direction of the flow path 4b between the batteries 4a. The structure arrange | positioned so that it may become the direction in alignment with may be sufficient.

  Moreover, in each said embodiment, although the heating control and cooling control of PCS6 have demonstrated the form performed using the heat exchanger 7, it is not limited to this system, For example, FIG.14, FIG.15, In the embodiment shown with reference to FIGS. 20 and 21, the power storage unit 4 may be replaced with the PCS 6. That is, a method in which the water in the tank 3 is allowed to flow through the flow path 6a of the PCS 6 and the PCS 6 is directly cooled and heated may be employed.

  Further, in each of the above-described embodiments, the embodiment is described in which the cooling or heating operation is performed when the temperature of the battery 4a is outside the predetermined temperature range, but the time required to complete the charging of the battery 4a, Cooling required to bring the battery 4a into a predetermined temperature range from at least one of the outside air temperature, the temperature of the battery 4a, and the temperature detected by the thermistor disposed below the can body thermistor 20. Alternatively, the heating operation time may be calculated, and the cooling or heating operation may be started by shifting the heating operation time calculated before the heating pump hot water supply operation start time of the heat pump unit 1.

  Moreover, in each said embodiment, although the form which adjusts the temperature of the battery 4a with the water which flows through this hot-water supply system was demonstrated, it is good also as a form which adjusts temperature with the air which passed the evaporator of the heat pump unit 1. FIG.

It is the schematic diagram which showed the structure of the hot water supply system of 1st Embodiment. In the hot water supply system of 1st Embodiment, it is the schematic diagram which showed the flow of the fluid of the boiling operation initial stage by the heat pump unit 1. FIG. FIG. 5 is a schematic diagram showing a flow of fluid in a boiling operation state in which hot water boiled to a target temperature is supplied into the tank 3. FIG. 5 is a schematic diagram illustrating a fluid flow in a state where the power storage unit 4 is cooled. It is the schematic diagram which showed the flow of the fluid in the state which heats the electrical storage means. It is the schematic diagram which showed the flow of the fluid in the state which cools PCS6. It is the schematic diagram which showed the flow of the fluid in the state when cooling both the electrical storage means 4 and PCS6 simultaneously. 4 is a main flowchart illustrating an example of temperature adjustment control of the power storage unit 4 in the hot water supply system according to the first embodiment. It is a subroutine of the temperature control operation in the main flowchart of FIG. It is a main flowchart which shows an example of the cooling control of PCS6 in the hot water supply system of 1st Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 2nd Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 3rd Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 4th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 5th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 6th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 7th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 8th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 9th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 10th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 11th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 12th Embodiment. It is the schematic diagram which showed the structure of the hot water supply system of 13th Embodiment.

Explanation of symbols

1 ... Heat pump unit (heating device)
2 ... Case 3 ... Tank 4 ... Power storage means 4a ... Battery 6 ... Power conditioner system (charge / discharge control means)
7 ... Heat exchanger (temperature control means, heat exchange means)
30 ... circulation piping (primary side circulation circuit)
33 ... Primary side piping (Primary side circulation circuit)
34 ... Secondary piping (secondary circulation circuit)
36 ... First temperature control pipe (tank circulation circuit)
37 ... Second temperature control pipe (tank circulation circuit)
39 ... Heat exchanger

Claims (7)

A heating device (1) for heating a fluid used for supplying hot water,
A tank (3) for storing the fluid heated by the heating device;
Power storage means (4) comprising a plurality of batteries (4a) for charging and discharging;
Temperature adjusting means (7) for adjusting the temperature of the battery by moving the amount of heat of the fluid by circulating the fluid in the tank;
A hot water supply system comprising:   The hot water supply system according to claim 1, wherein the tank (3) and the power storage means (4) are provided in the same casing (2).   The temperature adjusting means includes a primary side circulation circuit (30, 33) in which the primary side fluid stored in the tank circulates, and a secondary side circulation circuit in which the secondary side fluid passing through the power storage means circulates. The hot water supply system according to claim 1 or 2, further comprising: (34) and heat exchange means (7) for exchanging heat between the primary fluid and the secondary fluid.   Further, heat exchange is performed so that the secondary fluid after passing through the power storage device and before flowing into the heat exchange device is in thermal contact with the primary fluid before flowing into the tank. The hot water supply system according to claim 3, further comprising a water heater (39).   The temperature adjusting means includes a tank circulation circuit (36, 37) provided so that the fluid in the tank circulates through the power storage means, and the fluid in the tank circulates in the tank circulation circuit. The hot water supply system according to claim 1 or 2, wherein the power storage means is directly cooled and heated. Furthermore, it comprises charge / discharge control means (6) for controlling charge / discharge of the power storage means,
The said temperature adjustment means adjusts the temperature of the said charging / discharging control means by moving the calorie | heat_amount which the said fluid has by distribute | circulating the fluid in the said tank. Hot water supply system as described in.   The hot water supply system according to claim 6, wherein the tank (3) and the charge / discharge control means (6) are provided in the same casing (2).

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