JP2014119173A - Composite hot water supply device, and method of controlling composite hot water supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a composite hot water supply device capable of finely operating while sharing a hot water storage tank with a plurality of hot water suppliers.SOLUTION: A composite hot water supply device includes: a hot water storage tank 51 for storing hot water; a plurality of hot water suppliers 3, 5, 7, and 9 respectively having heat source devices 2, 4, 6 and 8 for supplying heated hot water to the hot water storage tank 51, and control portions for controlling the heat source devices 2, 4, 6, and 8; and a hot water supply system controller 60 capable of communicating with the controlling portions 11, 21, 31, and 41 of the plurality of hot water suppliers 3, 5, 7, and 9, deciding the hot water supplied to be operated and operation time on the basis of data sent from the control portions 11, 21, 31, and 41 and a state of the hot water in the hot water storage tank 51, and carrying out processing for instructing operation the decided hot water supplier to start operation.

Description

  The present invention relates to, for example, a composite hot water supply apparatus configured by a plurality of hot water heaters.

  Some conventional heat pump hot water supply apparatuses include a plurality of hot water storage tanks. In such a hot water supply apparatus, when the temperature of the hot water in one of the tanks is lowered, a configuration is known that enables continuous hot water discharge by sequentially switching between a hot water tank and a boiling tank (for example, a patent) Reference 1).

  In addition, it consists of multiple water heaters (units) such as heat pumps, solar collectors, gas heaters, etc. with different heat sources. A hybrid hot water supply system for switching has been proposed (see, for example, Patent Document 2).

Japanese Patent No. 3173204 (FIG. 1) JP 2012-13376 A (FIG. 1)

  The hot water supply system constituted by a plurality of hot water heaters as described above switches the hot water storage tank of each hot water heater so as not to cause a drop in the temperature of hot water in the hot water. In this system, since a plurality of hot water storage tanks are installed, there is a problem that the exclusive capacity of the hot water storage tank in the installation location and the apparatus becomes large.

  Further, in the hot water supply system described above, the control unit of each hot water heater grasps the state of the other hot water heaters and measures the timing of switching hot water to discharge hot water. For this reason, for example, when the same type of hot water heater having the same capacity exists in the hot water supply system, the hot water supply system may be switched to hot water at the same time. Therefore, it cannot be said that efficient operation is always possible.

  The present invention was made to solve the above-described problems, and it is an object of the present invention to provide a composite hot water supply apparatus and the like that can be operated effectively while sharing a hot water storage tank among a plurality of hot water heaters. And

  A combined hot water supply apparatus according to the present invention includes a hot water storage tank that stores hot water, a heat source device that supplies the heated hot water storage tank, and a plurality of hot water heaters each having a control unit that controls the heat source device, and a plurality of hot water heaters. A process for enabling communication with each control unit, determining the hot water heater to be operated and the operating time based on the data sent from each control unit and the state of hot water in the hot water storage tank, and instructing the hot water heater to be started to operate. And a hot water supply system controller.

  According to the present invention, the hot water heater to be operated in a plurality of hot water heaters is determined based on the state of the hot water in the hot water storage tank, and the temperature of the hot water in the hot water storage tank is increased. There is no need to provide a hot water storage tank, and a space-saving composite hot water supply apparatus can be obtained.

It is a figure which shows the structure of the composite hot-water supply apparatus in Embodiment 1 of this invention. It is a figure explaining the process in the hot water supply system controller 60 of the composite hot water supply apparatus 1 which concerns on Embodiment 1. FIG. It is a figure which shows the structure of the composite hot-water supply apparatus in Embodiment 2 of this invention. It is a figure which shows a part of structure of the composite hot-water supply apparatus in Embodiment 3 of this invention.

Embodiment 1 FIG.
The combined hot water supply apparatus of the first embodiment includes a hot water storage tank for storing hot water, a heat source device for heating and supplying hot water to the hot water storage tank, and a plurality of water heaters each having a control unit for controlling the heat source device, Based on the data sent from each control unit and the state of hot water in the hot water storage tank, the presence / absence of operation, the hot water heater to be operated and the operation time are determined, and the water heater related to the determination And a hot water supply system controller that performs processing for instructing the start of operation. Here, this invention is not limited to the structure of the composite hot-water supply apparatus 1 of embodiment, A combination can be suitably changed in the range which does not deviate from the content. In the following description, hot water may include water.

1 is a diagram showing a configuration of a composite hot water supply apparatus according to Embodiment 1 of the present invention. In FIG. 1, the composite hot water supply device 1 of Embodiment 1 uses a first heat pump water heater 3 that uses a first heat pump device 2 that uses an HFC-based refrigerant as a heat source device, and a CO ₂ (carbon dioxide) -based refrigerant, for example. And a second heat pump water heater 5 using the second heat pump device 4 as a heat source device. Moreover, the solar water heater 7 which uses the solar heat collector 6 as a heat source device, and the heater water heater 9 which uses the electric heater 8 as a heat source device are provided for assistance. And the hot water storage tank 51 and the hot water supply system controller 60 which each water heater shares are provided.

  Hot water delivered from the first heat pump water heater 3, the second heat pump water heater 5, the solar water heater 7, and the heater water heater 9 passes through the hot water collecting pipe 72 and is collected in the hot water collecting pipe 53 to be stored in the hot water storage tank. 51 flows in. Here, hereinafter, the first heat pump water heater 3, the second heat pump water heater 5, the solar water heater 7, and the heater water heater 9 will be referred to as hot water heaters 3, 5, 7, 9 when not described. .

  Further, hot water to be re-boiled or the like passes from the hot water storage tank 51 through the return hot water pipe 52 to the hot water heaters 3, 5, 7, 9 through one or more hot water heaters via the return hot water pipe 71. And boiled again.

  The first heat pump water heater 3 includes a first heat pump device 2, a hot water discharge pipe 14, an electromagnetic valve 16, and a control unit 11. The first heat pump device 2 constitutes a refrigerant circuit that connects a compressor, a condenser, a decompression device, and an evaporator (not shown) to circulate the refrigerant. Then, the hot water is heated and heated by heat exchange between the hot water and the refrigerant in the condenser. The tapping pipe 14 is connected to the hot water collecting pipe 72 and is a pipe for sending out hot water heated by the first heat pump device 2 to the hot water collecting pipe 72. The electromagnetic valve 16 opens and closes based on an instruction from the control unit 11, and causes the first heat pump device 2 to pass or stop the hot water in the return hot water pipe 71.

  Here, the first heat pump device 2 of the first heat pump water heater 3 constitutes a refrigerant circuit using the HFC refrigerant as the refrigerant as described above. In the refrigerant circuit using the HFC refrigerant, energy efficiency is good when the temperature rise is small. For this reason, it contributes to the improvement of the energy efficiency in re-boiling of hot water, for example, raising temperature from medium temperature to high temperature. For this reason, the 1st heat pump water heater 3 of this Embodiment does not have a water supply means, and shall use it only for re-boiling (it does not perform boiling (boosting)).

  The control unit 11 controls devices constituting the first heat pump water heater 3 such as start / stop of the compressor, operation control of the first heat pump device 2, opening / closing control of the electromagnetic valve, and the like. The control unit 11 includes a microcomputer (hereinafter referred to as a microcomputer) 11a and a communication transmitting / receiving unit 11b. The microcomputer 11a has, for example, data (information) related to the heating capability (hereinafter referred to as capability) of the first heat pump water heater 3, controls the operation of the first heat pump device 2, and operates based on the data. The heating state can be grasped.

  The communication transceiver 11b receives (receives) a signal from the hot water supply system controller 60 via the communication network 10. Further, the data from the microcomputer 11a is included in the signal and transmitted (transmitted). For example, when an acquisition request from the hot water supply system controller 60 is received, it is sent to the microcomputer 11a, and data relating to the ability of the first heat pump water heater 3 that is a response from the microcomputer 11a, operation state data, heating state data, and the like are transmitted. . Moreover, when the request | requirement of the operation | movement start of the 1st heat pump water heater 3 from the hot-water supply system controller 60 is received, it will send to the microcomputer 11a and the result etc. with respect to the request | requirement execution from the microcomputer 11a will be transmitted.

  The second heat pump water heater 5 includes a second heat pump device 4, a water supply pipe 22, an electromagnetic valve 23, a hot water outlet pipe 24, an electromagnetic valve 26, and a control unit 21. The second heat pump device 4 constitutes a refrigerant circuit that connects a compressor, a radiator, a decompressor, and an evaporator (cooler) (not shown) to circulate the refrigerant. And in a heat radiator, hot water is heated and heated up by heat exchange with hot water (water) and a refrigerant | coolant. The water supply pipe 22 is a pipe for supplying tap water or the like when heating while increasing the amount of water, for example, by increasing boiling. Further, the electromagnetic valve 23 opens and closes based on an instruction from the control unit 21 to pass or stop water from the water supply pipe 22. The tapping pipe 24 is a pipe that is connected to the hot water collecting pipe 72 and sends out the hot water heated by the second heat pump device 4 to the hot water collecting pipe 72. The electromagnetic valve 26 opens and closes based on an instruction from the control unit 21, and causes the second heat pump device 4 to pass or stop the hot water in the return hot water pipe 71.

Here, as described above, the second heat pump device 4 of the second heat pump water heater 5 forms a refrigerant circuit using the CO ₂ -based refrigerant that is a natural refrigerant. In a refrigerant circuit using a CO ₂ -based refrigerant, energy efficiency is good when a temperature rise with a large temperature range is performed. For this reason, it contributes to the improvement of energy efficiency when boiling from water to hot water, for example, raising the temperature from low temperature to high temperature.

  The control unit 21 controls devices constituting the second heat pump water heater 4 such as start / stop of the compressor, operation control of the second heat pump device 4, and opening / closing control of the electromagnetic valve. Similar to the control unit 11, the control unit 21 includes a microcomputer 21a and a communication transmitting / receiving unit 21b. The microcomputer 21a has, for example, data (information) related to the capability of the second heat pump water heater 4, controls the operation of the second heat pump device 4, and grasps the operation state and the heating state based on the data. it can.

  Similarly to the communication transceiver 11b, the communication transceiver 21b sends a signal from the hot water supply system controller 60 to the microcomputer 21a via the communication network 10. In addition, data from the microcomputer 21a is transmitted.

  The solar water heater 7 includes a solar heat collector 6, a water supply pipe 32, an electromagnetic valve 33, a hot water outlet pipe 34, an electromagnetic valve 36, a hot water temperature sensor 37, a tank 38, and a control unit 31. The solar collector 6 heats hot water (water) by the heat of sunlight and raises the temperature. The water supply pipe 32 is a pipe for supplying tap water or the like. The electromagnetic valve 23 opens and closes based on an instruction from the control unit 21 to pass or stop water from the water supply pipe 32. The tapping pipe 34 is connected to the hot water collecting pipe 72 and is a pipe for sending out hot water heated by the solar heat collector 6 to the hot water collecting pipe 72. The electromagnetic valve 36 opens and closes based on an instruction from the control unit 31 and passes or stops the hot water in the return hot water pipe 71 through the solar heat collector 6. The tank 38 is a hot water supply tank that the solar water heater 7 has, and stores the hot water heated by the solar heat collector 6 during the daytime. The hot water temperature sensor 37 is temperature detecting means for detecting the temperature of hot water in the tank 38.

  The control unit 31 controls devices that constitute the solar water heater 7. Similar to the control unit 11, the control unit 31 includes a microcomputer 31a and a communication transmitting / receiving unit 31b. The microcomputer 31a has, for example, data (information) related to the capability of the solar water heater 7, controls the solar heat collector 6, and can grasp the control state and the heating state based on the data.

  Similarly to the communication transceiver 11b, the communication transceiver 31b sends a signal from the hot water supply system controller 60 to the microcomputer 31a via the communication network 10. In addition, data from the microcomputer 31a is transmitted.

  The heater water heater 9 includes an electric heater 8, a water supply pipe 42, an electromagnetic valve 43, a hot water outlet pipe 44, an electromagnetic valve 46, and a control unit 41. An electric heater heats hot water (water) by changing electric power to heat and raises the temperature. The water supply pipe 42 is a pipe for supplying tap water or the like. The electromagnetic valve 43 opens and closes based on an instruction from the control unit 41 to pass or stop water from the water supply pipe 42. The hot water outlet pipe 44 is connected to the hot water collecting pipe 72 and is a pipe for sending out hot water heated by the electric heater 8 to the hot water collecting pipe 72. The electromagnetic valve 46 opens and closes based on an instruction from the control unit 41, and passes or stops the hot water in the return hot water pipe 71 through the electric heater 8.

  The control unit 41 controls the devices constituting the heater water heater 9. Similar to the control unit 11, the control unit 41 includes a microcomputer 41a and a communication transmitting / receiving unit 41b. The microcomputer 41a has, for example, data (information) related to the capability of the heater water heater 9, controls the electric heater 8, and can grasp the control state and the heating state based on the data.

  Similarly to the communication transceiver 11b, the communication transceiver 41b sends a signal from the hot water supply system controller 60 to the microcomputer 41a via the communication network 10. In addition, data from the microcomputer 41a is transmitted.

  The outside air temperature sensor 56 is a temperature detection unit that detects the temperature of outside air (outside air temperature) at the installation location of the water heaters 3, 5, 7, 9 and the hot water storage tank 51. The hot water storage temperature sensor 57 is temperature detecting means for detecting the temperature of hot water in the hot water storage tank 51 (hot water storage temperature). The water level sensor 58 is water level detection means for detecting the transition of hot water in the hot water storage tank 51. The water supply temperature sensor 59 is a temperature detection unit that detects the temperature of the water supplied from the water supply pipe 22 (water supply temperature). Here, the water supply temperature in the water supply pipe 22 is detected. However, for example, the water supply temperature in the water supply pipes 32 and 42 may be detected.

  The hot water supply system controller 60 is a control device that performs overall control of the combined hot water supply device 1. For example, the control is performed based on a schedule set for one day, weekly or the like. In the present embodiment, for example, when determining whether or not to operate based on the amount of stored hot water in the hot water storage tank 51, the temperature of the stored hot water, the capacity of the hot water heaters 3, 5, 7, 9 and the like, A process of determining the hot water heater to be operated and the scheduled operation time is performed. The hot water supply system controller 60 includes a microcomputer 60a and a communication transceiver 60b.

  The microcomputer 60a is connected to the control units 11, 21, 31, and 41 of the water heaters 3, 5, 7, and 9 via the communication transmitting / receiving unit 60b. Request transmission of data. In addition, an operation start instruction is transmitted to the water heater that is determined to be operated. The communication transceiver 60b sends signals from the controllers 11, 21, 31, 41 of the water heaters 3, 5, 7, 9 to the microcomputer 60a via the communication network 10. In addition, data such as requests and instructions from the microcomputer 41a is transmitted.

  Next, the operation of composite hot water supply apparatus 1 by hot water supply system controller 60 in the present embodiment will be described. In the combined hot water supply device 1 of the present embodiment, the hot water storage tank 51 is mainly operated by operating the second heat pump water heater 5 having the second heat pump device 4 as a heat source device at night when there is enough power and the power rate is low. Store hot water in And the 1st heat pump water heater 3 which makes the 1st heat pump apparatus 2 the heat source apparatus is operated for the heat retention use in the daytime, for example.

  The solar water heater 7 that is operated during the daytime can be heated without using electric power, so that the energy efficiency is improved. However, since the ability depends on the weather, it is operated as an auxiliary. Further, the heater water heater 9 is operated for other auxiliary purposes.

  For example, the hot water supply load varies depending on the time of the day, the day of the week, or the season, so that the complex hot water supply apparatus 1 is required to be flexible.

  The hot water supply system controller 60 periodically acquires the data on the capabilities of the water heaters 3, 5, 7, 9, the operation state of the heat source device, and the heating state from the water heaters 3, 5, 7, 9. Further, processing related to the operation of the hot water heaters 3, 5, 7, 9 is performed based on the hot water storage temperature of the hot water storage tank 51, the amount of stored hot water, etc., and the operation of the hot water heaters 3, 5, 7, 9 is started based on the processing results. Control the stop.

  FIG. 2 is a diagram for explaining processing in the hot water supply system controller 60 (microcomputer 60a) of the combined hot water supply apparatus 1 according to the first embodiment. Based on FIG. 2, the control which cooperated the some water heater in this Embodiment is demonstrated.

  The outside air temperature related to detection by the outside air temperature sensor 56, the water supply temperature related to detection by the water supply temperature sensor 59, and the hot water storage temperature related to detection by the hot water storage temperature sensor 57 are acquired (S100).

  Next, the current hot water storage amount in the hot water storage tank 51 (hereinafter referred to as the current hot water storage amount) is acquired (S101). The current hot water storage amount can be calculated, for example, based on the water level related to detection by the water level sensor 58. For example, in the case where a plurality of hot water storage temperature sensors 57 are provided in the height direction of the hot water storage tank 51, the temperature distribution in the height direction in the hot water storage tank 51 can be obtained and calculated and calculated.

  Moreover, the capability to heat based on the data showing the state of each water heater sent from the control part 11, 21, 31, 41 of the water heater 3, 5, 7, 9 is acquired (S102).

  Next, the hot water set temperature preset as the temperature of hot water required at the time of hot water supply is compared with the hot water storage temperature of the hot water storage tank 51. Further, the sufficient hot water storage amount set as an amount in which the hot water amount in the hot water storage tank 51 is sufficient is compared with the current hot water storage amount in the hot water storage tank 51 (S103). If it is determined that the hot water storage temperature> the hot water supply set temperature and the current hot water storage amount> the sufficient hot water storage amount, the process ends without operating all the hot water heaters. On the other hand, if it is determined that the hot water storage temperature> the hot water supply set temperature and the current hot water storage amount> the sufficient hot water storage amount, the process proceeds to S104.

  Next, the difference between the hot water supply set temperature and the set temperature increase range is compared with the hot water storage temperature of the hot water storage tank 51. A comparison is made between a hot water determination hot water storage amount that is set in advance and needs to be heated while increasing the hot water amount of the hot water storage tank 51, and the current hot water storage amount of the hot water storage tank 51 (S104). Here, the temperature increase width is a range in which the temperature of the hot water in the hot water storage tank 51 is increased by the first heat pump water heater 3 when boiling is not performed, and an arbitrary temperature lower than 15 ° C. Set. Here, for example, the temperature is set to 10 ° C. If it is determined that hot water storage temperature> hot-water supply set temperature-temperature rise width and current hot water storage amount> boiling increase determination hot water storage amount, the process proceeds to S110. If it is determined that the hot water storage temperature> the hot water supply set temperature−the temperature rise range and the current hot water storage amount> the boiling increase determination hot water storage amount, the process proceeds to S105.

  The amount of hot water boiling up from the current hot water storage amount of the hot water storage tank 51 is calculated by calculation (S105). Further, the amount of heat required for the amount of hot water related to the heating is calculated (S106). Here, when the amount of oil is used, the amount of heat is calculated based on the difference between the hot water supply set temperature and the current hot water storage temperature. If there is an amount of oil that increases in S105, the amount of heat is calculated after including the feed water temperature and the like.

  Next, the hot water heater to be operated and the scheduled operation time are determined (S107). Here, the scheduled operation time varies depending on the heat source device of the water heater to be operated, the operation time zone (daytime, nighttime), environmental conditions, and the like. In the determination, the amount of heat calculated with the optimum energy efficiency can be supplied within the operation time. Regarding energy efficiency, the optimal water heater varies depending on the operating time zone, environmental conditions, and the like, and there are various methods for determination. In addition, two or more water heaters can be determined in order to be able to supply heat by combining the water heaters. And the operation start is instruct | indicated via the communication network 10 with respect to the determined water heater (S108).

  In S104, when it is determined that hot water storage temperature> hot-water supply set temperature-temperature increase width and current hot water storage amount> boiling determination hot water storage amount, as described above, the energy efficiency is high when the temperature increase width is small. It heats with 1 heat pump water heater 3 (S110).

  As described above, in the combined hot water supply apparatus of the first embodiment, the temperature of the hot water in the hot water storage tank 51 is raised by the plurality of hot water heaters 3, 5, 7, and 9, so that hot water storage is performed for each hot water heater. There is no need to provide a tank, and a space-saving composite hot water supply apparatus can be obtained. The amount of heat calculated based on the hot water storage temperature and the amount of hot water stored in the hot water storage tank 51 is supplied by operating one or more of the water heaters 3, 5, 7, 9. Since the hot water storage temperature and the amount of hot water stored therein are set to, for example, the hot water supply set temperature and the sufficient hot water storage amount, hot water can be discharged from the hot water supply tank 51 at a required temperature without causing hot water shortage and temperature decrease. At this time, since the water heater suitable for operation is determined from the data relating to the heating capacity sent from each water heater and the calculated amount of heat, it can be operated efficiently.

Embodiment 2. FIG.
FIG. 3 is a diagram showing a configuration of a combined hot water supply apparatus according to Embodiment 2 of the present invention. In the combined hot water supply apparatus 1 of the first embodiment described above, the hot water supply system controller 60 is independently provided, and the amount of hot water and the hot water temperature in the hot water storage tank 51 are adjusted while communicating with the hot water heaters 3, 5, 7, and 9. Based on the control of the entire device.

  In the present embodiment, the control unit 11, 21, 31, 41 of any one of the water heaters 3, 5, 7, 9 has the function of the hot water system controller 60. For example, in FIG. 2, the control unit 21 included in the second heat pump water heater 5 further has the function of the hot water system controller 60. Therefore, the control unit 21 can execute the function of the hot water supply system controller 60, the hot water supply system controller 60 need not be provided, and communication wiring for the hot water supply system controller 60 need not be provided.

  As described above, according to the composite hot water supply apparatus of the second embodiment, any one of the control units 11, 21, 31, and 41 of the hot water heaters 3, 5, 7, and 9 bears the function of the hot water system controller 60. By executing and performing overall control, it is not necessary to install the hot water supply system controller 60 and to perform wiring for communication, so that the installation work can be easily performed.

Embodiment 3 FIG.
In the above-described embodiment, the control units 11, 21, 31, and 41 of the water heaters 3, 5, 7, and 9 have the communication transceiver units 11b, 21b, 31b, and 41b, respectively, Communication was possible. In the present embodiment, a description will be given of a composite hot water supply apparatus 1 in which hot water heaters including a control unit that does not have a communication transmitting / receiving unit are mixed.

  FIG. 4 is a diagram showing a part of the configuration of the combined hot water supply apparatus according to Embodiment 3 of the present invention. In FIG. 4, devices and the like having the same reference numerals as those in FIG. 1 realize the same functions and processes as described in the first embodiment.

  As shown in FIG. 4, the control part 21 of the 2nd heat pump water heater 5 does not have a transmission / reception part for communication. Therefore, in the present embodiment, an auxiliary controller 61 is further provided, and the control unit 21 communicates with the hot water supply system controller 60 via the auxiliary controller 61. Here, although the control part 21 of the 2nd heat pump water heater 5 was taken as an example, it is not limited to this.

  The auxiliary controller 61 according to the present embodiment can send a signal related to operation from, for example, a contact input of the control unit 21 from the outside of the second heat pump water heater 5. Further, in response to an acquisition request from the hot water supply system controller 60, data related to the heating capacity is transmitted instead of the control unit 21. The auxiliary controller 61 includes a microcomputer 61a and a communication transceiver 61b.

  The microcomputer 61a can send a signal to the contact input that can control the start and stop of the operation of the second heat pump water heater 5 via, for example, the operation start contact input line 62 and the operation stop contact input line 63, 2 The function which controls the start and stop of operation of the heat pump water heater 5 is provided. Further, the microcomputer 61a can arbitrarily register and retain data relating to the heating capacity of the water heater. For this reason, the data regarding a heating capability can be transmitted instead of the control part 21. FIG.

  The transmission / reception unit 61b for communication sends an instruction related to operation from the hot water supply system controller 60 to the microcomputer 61a via the communication network 10. In addition, data from the microcomputer 61a is transmitted.

  As described above, even if the control unit of the hot water heater does not have a communication transmitter / receiver, the data required by the hot water system controller 60 can be sent via the auxiliary controller 61, and the hot water system control is performed. Since the water heater can be controlled in response to an instruction from the water heater 60, the same effects as those of the first and second embodiments described above can be obtained.

  DESCRIPTION OF SYMBOLS 1 Composite hot water supply device, 2 1st heat pump device, 3 1st heat pump water heater, 4 2nd heat pump device, 5 2nd heat pump water heater, 6 Solar power collector, 7 Solar water heater, 8 Electric heater, 9 Heater Water heater, 10 communication network, 11, 21, 31, 41 control unit, 11a, 21a, 31a, 41a, 60a, 61a microcomputer, 11b, 21b, 31b, 41b, 60b, 61b communication transceiver unit, 14, 24, 34, 44 Hot water pipe, 16, 23, 26, 33, 36, 43, 46 Solenoid valve, 22, 32, 42 Water supply pipe, 37 Hot water temperature sensor, 38 tank, 51 Hot water storage tank, 52 Return hot water pipe, 53 Hot water collection Pipe, 54 Hot water supply pipe, 55 Hot water supply valve, 56 Outside air temperature sensor, 57 Hot water storage temperature sensor, 58 Water level sensor, 59 Water supply temperature sensor, 60 Hot water system controller, 61 an auxiliary controller 62 operated trigger contact input lines, 63 shutdown contact input lines, 71 return water pipe, 72 Atsumariyu pulling pipe.

Claims (8)

A hot water storage tank for storing hot water,
A plurality of water heaters each having a heat source device for supplying heated hot water to the hot water storage tank and a control unit for controlling the heat source device;
It is possible to communicate with each control unit of a plurality of hot water heaters, determine the hot water heater to be operated and the operating time based on the data sent from each control unit and the state of the hot water in the hot water storage tank, and A combined hot water supply apparatus comprising a hot water supply system controller that performs processing for instructing operation. Among the plurality of water heaters, a circulating water heating type heat pump type water heater using an HFC refrigerant as the heat source device, and a water supply boiling type heat pump type water heater using a CO ₂ -based refrigerant as the heat source device, The combined hot water supply device according to claim 1, wherein at least one unit is provided.   The combined hot water supply apparatus according to claim 1 or 2, wherein a control unit of at least one hot water heater performs processing of the hot water supply system controller.   The hot water supply system controller calculates the amount of heat applied to bring the hot water in the hot water storage tank to a predetermined temperature and predetermined amount based on the hot water storage temperature and the hot water storage amount in the hot water storage tank, and each hot water heater sent from each control unit The combined hot water supply apparatus according to any one of claims 1 to 3, wherein a hot water heater to be operated and an operation time are determined based on data relating to the heating capacity of the battery.   The hot water supply system controller is communicably connected, and is connected to the control unit that does not have a communication function via a contact input to transmit the data to the hot water system controller, and the hot water system control The composite hot water supply device according to any one of claims 1 to 4, further comprising an auxiliary controller that gives an operation instruction from a heater to the control unit via the contact input.   The combined hot water supply apparatus according to claim 4, wherein the hot water supply system controller further calculates the amount of heat based on an outside air temperature and a water supply temperature.   The hot water supply system controller operates the heat pump type hot water heater of the circulating water heating type when it is determined to perform heating that does not increase boiling with a temperature increase width less than a predetermined temperature. The combined hot water supply apparatus described. A hot water storage tank for storing hot water, a heat source device for supplying heated hot water to the hot water storage tank, a plurality of water heaters each having a control unit for controlling the heat source device, and a control unit for the plurality of water heaters can communicate with each other And a hot water supply system controller
The hot water system controller is
Calculating the amount of heat applied to bring the hot water in the hot water storage tank to a predetermined temperature and a predetermined amount based on the hot water storage temperature and the hot water storage amount in the hot water storage tank;
A control method for a composite water heater, comprising: determining a hot water heater to be operated and an operating time based on data relating to the heating capacity of each hot water heater sent from each controller.

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