JP7445853B2 - hot water storage water heater - Google Patents

Description

The present invention relates to a hot water storage water supply device, and more particularly to a hot water storage water supply device that stores hot water in preparation for emergencies such as disasters.

Conventionally, microcomputer meters have been widely used to detect earthquake shaking and stop the supply of fuel gas in order to prevent fires when an earthquake occurs. In the event of an earthquake, fuel gas becomes unavailable, so for example, as disclosed in Patent Document 1, when earthquake shaking is detected, ignition of the combustion heat source device is prohibited, and hot water is heated and stored using an electric heat pump heat source device. A water heater is known.

Further, as in Patent Document 2, there is known a hot water storage and water supply device that heats and stores hot water using a heat pump heat source device operated by electric power when a stop in the supply of fuel gas is detected. Heat pump heat source equipment, which generally has a smaller heating capacity than combustion type heat source equipment, requires time to store hot water, so if hot water storage is started after an earthquake occurs, as in Patent Documents 1 and 2 above, power outages that may occur later will result in insufficient water storage. There is a possibility that the heat capacity of hot water storage cannot be secured.

On the other hand, as in Patent Document 3, there is known a bath water heater that includes a broadcast receiving device that receives emergency warning broadcasts such as large-scale earthquake warning declarations and tsunami warnings, and that stores hot water in the bathtub when receiving the emergency warning broadcasts. . You can fill the bathtub with hot water before a water outage or power outage occurs due to an earthquake or tsunami.

In addition, as in Patent Document 4, when water outage information due to drought etc. is obtained via an external communication network, hot water storage is stopped or hot water is stopped so as to prevent the risk of high temperature hot water being supplied due to the inability to mix tap water. BACKGROUND ART A hot water storage and water heater device that lowers the temperature of stored hot water is known.

Japanese Patent Application Publication No. 2017-227401 Patent No. 5592429 Patent No. 4611947 Japanese Patent Application Publication No. 2007-232344

However, fuel gas supply outages, water outages, and power outages are not only caused by earthquakes, accompanying tsunamis, droughts, etc., but also by typhoons and heavy rains that can be predicted to some extent in advance, as well as planned interruptions due to infrastructure repairs, etc. In some cases, it may be done. Hot water storage water heaters are required to make preparations in advance in case of such an emergency when hot water cannot be supplied because fuel gas, clean water, and electricity are unavailable.

An object of the present invention is to provide a hot water storage and hot water supply device that can make preparations in advance in case of an emergency.

The hot water storage and hot water supply device of the invention according to claim 1 includes a main heat source device, a hot water storage tank, an auxiliary heat source device, an external communication means, and a control means, and performs a hot water storage operation in which hot water is stored in the hot water storage tank using the main heat source device. In the hot water storage and hot water supply device that supplies hot water stored in the hot water storage system or hot water heated by the auxiliary heat source device, the control means operates in a normal mode in which the hot water storage operation is performed according to the usage mode of the user, and in a normal mode in which the hot water storage operation is performed in accordance with the usage mode of the user. an emergency preparation mode in which hot water is generated and stored in the hot water storage tank; When transitioning to the emergency preparation mode, hot water heated by the main heat source machine or the auxiliary heat source machine is stored in the hot water storage tank , and when shifting to the emergency preparation mode by the control means, the main heat source machine is used. The main heat source device or When selecting one of the auxiliary heat source machines and shifting to the emergency preparation mode by the user's operation, the user selects either the main heat source machine or the auxiliary heat source machine as the heat source machine to be used for generating hot water. It is characterized by

According to the above configuration, in the normal mode, hot water is stored in the hot water storage tank according to the usage pattern of the user. When emergency information regarding the weather or infrastructure is acquired through external communication means during the normal mode, the system shifts to the emergency preparation mode and stores the hot water generated in the hot water tank in preparation for an emergency. Therefore, hot water can be prepared in advance in case of an emergency.

In addition, when the control means shifts to the emergency preparation mode, the hot water source is supplied with hot water suitable for emergency preparation according to the time until the emergency when hot water cannot be generated according to the emergency information regarding weather or infrastructure. The heat source device to be used for generation is selected based on a determination process that determines whether it is a main heat source device or an auxiliary heat source device , and when the user's operation shifts to the emergency preparation mode, the heat source device is used for generating hot water. The user selects either the main heat source device or the auxiliary heat source device . Therefore, hot water can be generated with a heat source device suitable for preparing hot water depending on the situation according to the control means or the user's selection .

In the hot water storage hot water supply device according to the invention of claim 2 , in the invention of claim 1 , the control means controls the hot water stored in the hot water storage tank or the hot water heated by the auxiliary heat source machine during the emergency preparation mode. It is characterized by supplying hot water to the bathtub.
According to the above configuration, hot water larger than the capacity of the hot water storage tank can be prepared in advance during the emergency preparation mode.

The hot water storage water supply device of the invention according to claim 3 is the invention according to claim 1 or 2 , and includes a mixing means for mixing hot water and tap water to supply hot water at a hot water supply setting temperature, and the control means is configured to control the emergency preparation. The mixing means is characterized in that when in the mode, the mixing means is adjusted to a state where hot water can be supplied at a hot water supply setting temperature according to the hot water storage temperature in the hot water storage tank and the temperature of the tap water.
According to the above configuration, the hot water stored in the hot water storage tank in the emergency preparation mode can be adjusted to the hot water supply setting temperature and hot water can be supplied even during a power outage. Therefore, high-temperature hot water can be prepared in the hot water storage tank to maximize the amount of stored hot water, and hot water can be safely supplied even during a power outage.

According to the hot water storage and hot water supply device of the present invention, preparations can be made in advance in case of an emergency.

1 is a diagram showing a hot water storage and water supply device connected to an external communication network according to an embodiment of the present invention. It is a control flowchart in the normal mode and emergency preparation mode according to the first embodiment of the present invention. It is a control flowchart at the time of the normal mode and the emergency preparation mode based on Example 2 of this invention.

EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing this invention is demonstrated. The following description of preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its applications, or its uses.

First, the hot water storage and hot water supply device 1 will be explained.
As shown in FIG. 1, the hot water storage and hot water supply device 1 includes a hot water storage tank 2 for storing hot water, a main heat source device 3, an auxiliary heat source device 4, and a control unit 5 (control means). The main heat source device 3 circulates and heats hot water in the hot water storage tank 2. The auxiliary heat source device 4 is a combustion type heat source device that heats hot water or clean water in the hot water storage tank 2 by burning fuel gas. The control unit 5 controls the operation of the main heat source device 3 and the auxiliary heat source device 4 based on a control program and setting parameters.

The bottom of the hot water storage tank 2 is connected to a main heat source passageway 6 that supplies hot water to the main heat source device 3, and the top of the hot water storage tank 2 is connected to the main heat source device 3 to return hot water heated by the main heat source device 3 to the hot water storage tank 2. A main heat source machine return passage 7 is connected. A main heat source machine going temperature sensor 6 a that detects the temperature of hot water supplied to the main heat source machine 3 is arranged in the main heat source machine going passage 6 . A main heat source return temperature sensor 7a is disposed in the main heat source return passage 7 to detect the temperature of hot water heated by the main heat source return passage 7.

The main heat source device 3 is, for example, a heat pump type heat source device that operates and heats with electric power. Hot water in the hot water storage tank 2 is circulated by a circulation pump (not shown) installed in the main heat source machine 3 or the main heat source machine going passage 6, and a hot water storage operation is performed in which the hot water is heated and stored using the heat of the air. The main heat source device 3 has a smaller heating capacity than the auxiliary heat source device 4, so it cannot quickly generate hot water, but it has high heating efficiency, is economical, and has a low environmental burden. Note that the main heat source device 3 may be one that heats hot water by generating heat using electric power, for example, or may be one that heats hot water using exhaust heat when generating electricity using fuel gas. .

Further, a water supply passage 8 for supplying clean water to the hot water storage tank 2 is connected to the bottom of the hot water storage tank 2 . The water supply passage 8 is provided with a water supply temperature sensor 8a that detects the temperature of the supplied water, as shown by arrow CW. A hot water outlet passage 9 for discharging hot water from the hot water tank 2 is connected to the upper part (top) of the hot water storage tank 2 .

A plurality of hot water temperature sensors 2a to 2e are arranged in the hot water storage tank 2 so as to be lined up at predetermined intervals in the height direction of the hot water storage tank 2 in order to detect the temperature of the hot water inside the hot water storage tank 2. . The hot water storage tank 2, including the hot water storage temperature sensors 2a to 2e and the tank outlet temperature sensor , is covered with a heat insulating member (not shown) to prevent heat radiation of the stored hot water. Additionally, an emergency drain plug (not shown) is provided so that the user can take out and use the hot water in the hot water storage tank 2 in the event of a water outage.

A mixing valve 10 (mixing means) is connected to the downstream end of the tapping passage 9. A first branch passage 11 branched from the water supply passage 8 and a hot water supply passage 12 are connected to the mixing valve 10 . The mixing valve 10 is configured to be able to adjust the mixing ratio of hot water supplied from the tap water passage 9 and low-temperature clean water supplied from the first branch passage 11. Hot water mixed by the mixing valve 10 is supplied to a hot water supply passage 12 and is supplied from a hot water tap 13 or the like.

A mixing valve inlet temperature sensor 9 a that detects the temperature of hot water supplied to the mixing valve 10 is disposed in the hot water outlet passage 9 . The hot water supply passage 12 is provided with a hot water temperature sensor 12a that detects the hot water temperature, and a hot water flow rate sensor 12b that detects the hot water flow rate.

A second branch passage 14 is further branched from the water supply passage 8, and this second branch passage 14 is connected to a three-way valve 15. Further, a hot water branch passage 16 branched from the hot water tap passage 9 and an auxiliary heat source heating passage 17 for heating hot water by the auxiliary heat source machine 4 and supplying it to the hot water tap passage 9 are connected to the three-way valve 15.

The auxiliary heat source device heating passage 17 is provided with a pump 17a for supplying hot water to the auxiliary heat source device 4, and an auxiliary heat source device inlet temperature sensor 17b for detecting the temperature of the hot water supplied to the auxiliary heat source device 4. There is. The hot water supplied to the auxiliary heat source device 4 is switched by the three-way valve 15 to clean water supplied from the second branch passage 14 or hot water from the hot water storage tank 2 supplied from the hot water branch passage 16.

A hot water filling passage 18 branched from the hot water supply passage 12 is connected to a bathtub 19, and hot water is supplied to the bathtub 19 by opening a hot water filling valve 18a. The water level in the bathtub 19 is detected by the pressure detected by a water level sensor 18b disposed in the hot water filling passage 18. The drain plug 19a of the bathtub 19 drains hot water from the bathtub 19 as shown by arrow D. The drain plug 19a can be opened and closed by the control unit 5, but the drain plug 19a may be opened and closed by the user.

The control unit 5 controls the valves disposed in each part based on the temperature detected by the temperature sensor disposed in each part such as the hot water storage temperature sensor 2a, the flow rate detected by the hot water supply flow rate sensor 12b, the water level detected by the water level sensor 18b, etc. Operates equipment such as pumps and other equipment to control various operations. Further, the control unit 5 has a clock function, a timer function, and the like, and has a function of learning and storing the user's hot water usage usage.

An operation terminal 20 (external communication means) communicates with the control unit 5 in order to operate the hot water storage water heater 1, which is normally installed outdoors, perform various setting operations such as hot water supply temperature setting, mode change operations, etc. from indoors. Communication is connected. The operation terminal 20 has an operation section, a display section, a communication section, etc., and is connected to the Internet 30, which is an external communication network, via a wireless home network described later. The operation terminal 20 is, for example, a kitchen remote control installed in the kitchen. On the display section of the operation terminal 20, information such as the hot water supply setting temperature and the operating status of the hot water storage and hot water supply apparatus 1 is displayed.

Next, hot water storage operation will be explained.
For example, in the case where the main heat source device 3 is a heat pump heat source device that heats hot water using electric power, the control unit 5 predicts the hot water usage time and hot water consumption amount based on the user's hot water usage usage that has been learned and memorized. , the hot water storage operation is controlled so that the hot water storage operation using the main heat source device 3 is completed immediately before the predicted use of hot water supply. Then, when the amount of heat equivalent to the predicted amount of hot water used is stored, the hot water storage operation ends. In the case where the main heat source device 3 heats hot water using exhaust heat generated when generating electricity using fuel gas, hot water storage operation is performed according to the user's power usage mode.

Next, hot water supply operation will be explained.
When the hot water supply flow rate sensor 12b detects a flow rate equal to or higher than a predetermined value, the control unit 5 starts a hot water supply operation in which hot water is supplied at a set temperature. During the hot water supply operation, the control unit 5 adjusts the mixing ratio of the mixing valve 10 to the hot water supply set temperature based on the temperatures detected by the mixing valve inlet temperature sensor 9a, the water supply temperature sensor 8a, and the hot water temperature sensor 12a. At this time, basically, the hot water stored in the hot water storage tank 2 by the hot water storage operation is used for hot water supply. When the flow rate detected by the hot water supply flow rate sensor 12b becomes less than a predetermined value, the control unit 5 ends the hot water supply operation.

When the main heat source device 3 is, for example, a heat pump heat source device, the control unit 5 controls, in hot water supply operation, for example, the hot water usage time, the hot water supply flow rate detected by the hot water supply flow rate sensor 12b, the mixing of the hot water usage time, the hot water supply flow rate, and the mixing valve 10 . It learns and stores the user's usage pattern regarding hot water supply, including the amount of hot water required from the ratio.

When there is no hot water in the hot water storage tank 2 at a temperature that can be used for hot water supply, such as when the stored hot water is used up during hot water supply operation, the control unit 5 drives the pump 17a to supply hot water from the water supply passage 8. The hot water supply operation is performed using hot water heated by the auxiliary heat source device 4. Further, for example, when the hot water supply setting temperature is changed after hot water is stored and hot water is to be supplied at a high temperature that cannot be supplied using the stored hot water, the tap water or the stored hot water is heated by the auxiliary heat source device 4 and used for hot water supply.

Next, the hot water filling operation will be explained.
The control unit 5 starts the hot water filling operation so that the bathtub 19 is completely filled at the hot water filling time set by the operation of the operating terminal 20 or by the timer function. For example, the drain valve 19a is closed, the hot water filling valve 18a is opened, and hot water stored in the hot water storage tank 2 or hot water heated by the auxiliary heat source device 4 is used to bring the bathtub temperature up to a predetermined water level. Perform tension driving.

Next, a wireless home network will be explained.
Although not shown, information terminals in the home such as personal computers and smartphones, home appliances such as televisions and air conditioners, and home appliances such as televisions and air conditioners are connected to the wireless home network, and as shown in FIG. 1, an operating terminal 20 is also connected for communication. . This wireless home network is constructed by the wireless router function of the line termination device 31 for connecting to the Internet 30, or by the wireless router device connected to the line termination device 31. This allows devices connected to the wireless home network to utilize various services via the Internet 30. Note that the hot water storage and hot water supply device 1 can also be configured to directly connect to the Internet 30 via a mobile phone line.

Next, the external server 32 will be explained.
The external server 32 is installed, for example, by the provider (manufacturer) of the hot water storage water heater 1 so as to maintain an appropriate state of the hot water storage water heater 1 connected via the Internet 30, and stores information regarding the hot water storage water heater 1. to manage. This external server 32 provides weather information according to the installation area of the hot water storage water heater 1, information regarding infrastructure such as fuel gas, water supply, and electricity, or information for connecting to a provider that provides weather information and information regarding infrastructure. is provided to the hot water storage and hot water supply device 1.

Next, regarding the normal mode and emergency preparation mode that the control unit 5 has, a first embodiment will be described based on the flowchart in FIG. 2, and a second embodiment will be described based on the flowchart in FIG. Si (i=1, 2, . . . ) in the figure represents a step. As described above, the normal mode is an operation mode in which hot water storage operation is performed based on the learned and memorized hot water usage history in order to store hot water according to hot water usage. The emergency preparation mode is an operation mode in which hot water that can be supplied is prepared in advance in case of an emergency.

In S1 of FIG. 2, the control unit 5 connects to the external server 30 via the operating terminal 20, which is an external communication means, collects information regarding weather and infrastructure, and proceeds to S2. Then, in S2, emergency information regarding the weather or infrastructure in the area where the hot water storage and water heater 1 is installed includes the approach of a typhoon within a predetermined time (for example, within 6 hours), predictions of heavy rain or tornadoes, temporary use of fuel gas, electricity, and water supply. When information such as a supply stop schedule is acquired (when the determination in S2 is Yes), the process proceeds to S6. If emergency information regarding the weather or infrastructure has not been acquired (if the determination in S2 is No), the process advances to S3.

In S3, it is determined whether the current mode is normal mode. If the determination in S3 is Yes, the process proceeds to S5, and if the determination in S3 is No, the process proceeds to S4, and after transitioning to the normal mode, the process proceeds to S5. Then, in S5, the process waits in the normal mode in preparation for hot water storage operation, hot water supply operation, etc., and then returns. In the normal mode, for the safety of the user, the mixing valve 10 is adjusted so that the hot water outlet passage 9 side is closed when hot water is not being heated. The hot water stored in the tank 2 is prevented from being supplied.

On the other hand, if the determination in S2 is Yes, it is determined in S6 whether or not the current state is the emergency preparation mode. If the determination in S6 is Yes, the process advances to S15, where the process waits in an emergency preparation mode in preparation for hot water supply operation, etc., and then returns. If the determination in S6 is No, the process proceeds to S7, in which the process shifts to emergency preparation mode and proceeds to S8. In the emergency preparation mode, the temperature of the hot water stored in the hot water storage tank 2 is adjusted even when hot water is not being supplied so that even if the mixing valve 10 cannot be adjusted due to a power outage, hot water can be supplied at the set temperature. The mixing ratio of the mixing valve 10 is adjusted based on the water temperature.

In S8, it is determined whether hot water can be stored in the hot water storage tank 2 using the main heat source device 3. It is determined whether a sufficient amount of heat can be stored using the main heat source device 3 based on the predicted typhoon approach time, scheduled temporary supply stop time, etc. included in the acquired emergency information. Although it depends on the capacity of the hot water storage tank 2 and the heating capacity of the heat source device, generally when the main heat source device 3 is used, the hot water storage tank 2 is filled with hot water in about 2 to 3 hours, and the auxiliary heat source device 4 is filled with hot water. If the hot water tank 2 is used, the hot water tank 2 will be filled with warm water in about 15 to 30 minutes.

If the determination in S8 is Yes, the process proceeds to S9, where the main heat source device 3 is selected as the heat source device to be used, and the process proceeds to S11. If the determination in S8 is No, the process proceeds to S10, where the auxiliary heat source device 4 is selected as the heat source device to be used, and the process proceeds to S11. Then, in S11, hot water generated using the selected heat source device is stored in the hot water storage tank 2, and the process proceeds to S12.

At this time, the temperature of the hot water stored in the hot water storage tank 2 is set according to the type of heat source device so that the amount of heat stored in the hot water is maximized. Set. In the event of a water outage, hot water may be stored at a preset temperature, for example, so that hot water can be safely taken out from an emergency drain plug in the hot water storage tank 2.

In S12, it is determined whether or not it is possible to fill the bathtub 19 with hot water stored in the hot water storage tank 2. Specifically, the presence or absence of hot water in the bathtub 19 is determined based on the pressure detected by the water level sensor 18b and the open/closed state of the drain valve 19a. Furthermore, the amount of heat stored in the hot water is calculated based on the temperatures detected by the hot water storage temperature sensors 2a to 2e, and it is determined whether or not the amount of heat necessary for filling the hot water has been stored. Further, it is determined whether or not the bathtub 19 can be filled with hot water heated using the auxiliary heat source device 4.

If there is no hot water in the bathtub 19 and the amount of heat necessary for filling the bathtub has been stored, or if the bathtub 19 can be filled with hot water using the auxiliary heat source device 4, that is, if the determination in S12 is Yes, the process advances to S13. Then, in S13, the bathtub 19 is filled with hot water using the hot water stored in the hot water storage tank 2 or the hot water heated by the auxiliary heat source device 4, and the process proceeds to S14.

The hot water filling temperature at this time is the bathtub temperature set by the user for taking a bath, but the user may also set the bathtub temperature in the emergency preparation mode according to the purpose. On the other hand, if the determination in S12 is No, the process advances to S14. Note that if the drain valve 19a is opened and closed by the user, the bathtub 19 is set not to be filled with hot water.

In S14, it is determined whether or not the hot water storage tank 2 has completed storing hot water. At this time, the determination may be made based on the amount of stored hot water corresponding to the temperature detected by the hot water storage temperature sensors 2a to 2e, and the temperature detected by the main heat source equipment inlet temperature sensor 6a or the auxiliary heat source equipment inlet temperature sensor 17b may be used to determine the amount of hot water stored in the hot water storage tank. It may be determined that 2 is filled with hot water.

If the determination in S14 is No, the process returns to S11 to continue storing hot water, and if the determination in S14 is Yes, the process proceeds to S15. Then, in S15, the process waits in the emergency preparation mode and returns. In addition to the above S4, the emergency preparation mode is also shifted to the normal mode by the user's operation from the operating terminal 20 or the like.

Currently, it is difficult to predict earthquakes, so it is not included in the emergency preparedness mode. When the fuel gas supply is stopped due to an earthquake, the control unit 5 detects the fuel gas supply stoppage or acquires fuel gas supply stoppage information via the Internet 30, and shifts to the emergency mode, The use of equipment that uses fuel gas is prohibited. In this emergency mode, the main heat source device 3 performs a hot water storage operation if it is possible, and if a hot water supply operation using the stored hot water is possible, hot water is supplied in response to a hot water supply request.

In S21 of FIG. 3, for example, when a mode switching operation is performed by a user who has acquired weather and infrastructure information earlier than the hot water storage and water supply apparatus 1, the process proceeds to S22. The user determines the presence or absence of emergency information regarding the weather and infrastructure, checks the mode of the control unit 5 of the hot water storage and water supply device 1 using the operation terminal 20, and performs a mode switching operation if necessary.

In S22, it is determined whether the current mode is normal mode. If the determination in S22 is No, the process proceeds to S23, in which the process shifts to normal mode and proceeds to S24. Then, in S24, the process waits in the normal mode and returns.

On the other hand, if the determination in S22 is Yes, the process advances to S7. Then, in S7, the system shifts to emergency preparation mode. A warm water preparation operation is performed in S7 to S15, but since it is the same as in the first embodiment, the explanation will be omitted. Note that the determination as to whether hot water can be stored in the main heat source device 3 in S8 is made by the control unit 5 that has acquired emergency information regarding weather and infrastructure from the Internet 30, but it is determined by the user who has acquired the emergency information. A heat source device to be used for hot water storage may be selected by operating the operating terminal 20.

The functions and effects of the hot water storage and hot water supply device 1 of the above embodiment will be explained.
In the normal mode, the hot water storage and hot water supply device 1 stores hot water in the hot water storage tank 2 according to the hot water supply use. When emergency information regarding weather or infrastructure is acquired through the operation terminal 20 (external communication means) during the normal mode, or by user operation, the system switches to the emergency preparation mode and uses the hot water generated in preparation for an emergency. Store hot water in hot water storage tank 2. Therefore, hot water can be prepared in advance in case of an emergency.

When the control unit 5 shifts to the emergency preparation mode, the main heat source device 3 or the auxiliary heat source device is selected as the heat source device to be used for generating hot water, depending on the time until the emergency, based on emergency information regarding weather or infrastructure. Select one of 4. Therefore, hot water can be generated using a heat source device suitable for preparing hot water depending on the situation.

In the emergency preparation mode, if the bathtub 19 can be filled with hot water using hot water stored in the hot water storage tank 2 or hot water heated by the auxiliary heat source device 4, the control unit 5 fills the bathtub 19 with hot water. Tighten it. Therefore, in the emergency preparation mode, hot water larger than the capacity of the hot water storage tank 2 can be prepared in advance.

In the emergency preparation mode, the control unit 5 adjusts the mixing valve 15 (mixing means) to a state where hot water can be supplied at the hot water supply setting temperature according to the hot water storage temperature of the hot water storage tank 2 and the temperature of the tap water. Therefore, the hot water stored in the hot water storage tank 2 in the emergency preparation mode can be adjusted to the hot water supply setting temperature and hot water can be safely supplied even during a power outage. Therefore, high-temperature hot water can be prepared in the hot water storage tank 2 to maximize the amount of stored hot water, and hot water can be safely supplied even during a power outage.

In addition, those skilled in the art can implement various modifications to the embodiments described above without departing from the spirit of the present invention, and the present invention includes such modifications.

1: Hot water storage water supply device 2: Hot water storage tanks 2a to 2e: Hot water storage temperature sensor 3: Main heat source device 4: Auxiliary heat source device 5: Control unit (control means)
6: Main heat source machine going passage 6a: Main heat source machine going temperature sensor 7: Main heat source machine returning passage 7b: Main heat source machine return temperature sensor 8: Water supply passage 8a: Water supply temperature sensor 9: Hot water outlet passage 9a: Mixing valve inlet temperature sensor 10: Mixing valve (mixing means)
11: First branch passage 12: Hot water supply passage 12a: Hot water supply temperature sensor 12b: Hot water supply flow rate sensor 13: Hot water tap 14: Second branch passage 15: Three-way valve 16: Hot water outlet branch passage 17: Auxiliary heat source device heating passage 17a: Pump 17b :Auxiliary heat source machine inlet temperature sensor
18: Hot water filling passage 18a: Hot water filling valve 18b: Water level sensor 19: Bathtub 19a: Drain valve 20: Operation terminal (external communication means)
30: Internet 31: Line termination device 32: External server

Claims (3)

It is equipped with a main heat source device, a hot water storage tank, an auxiliary heat source device, an external communication means, and a control means, and performs a hot water storage operation in which hot water is stored in the hot water storage tank using the main heat source device, and the stored hot water or the auxiliary heat source device In a hot water storage device that supplies hot water heated by
The control means has a normal mode in which the hot water storage operation is performed according to the user's usage pattern, and an emergency preparation mode in which hot water is generated and stored in the hot water storage tank in preparation for an emergency,
When emergency information regarding the weather or infrastructure is acquired through the external communication means during the normal mode, or by a user's operation, the main heat source device or the auxiliary heat source device shifts to the emergency preparation mode. storing hot water heated by in the hot water storage tank ;
When the control means shifts to the emergency preparation mode, whether to generate hot water using the main heat source device or to generate hot water using the auxiliary heat source device is determined according to the emergency information. selecting one of the main heat source device or the auxiliary heat source device based on a determination process to determine whether it is suitable for preparation response;
When shifting to the emergency preparation mode by the user's operation, the user selects either the main heat source device or the auxiliary heat source device as the heat source device to be used for generating hot water . 2. The control means, when in the emergency preparation mode, supplies hot water stored in the hot water storage tank or hot water heated by the auxiliary heat source device to the bathtub. Hot water storage water heater. Equipped with a mixing means for mixing hot water and tap water to produce hot water at a hot water supply setting temperature,
The control means is characterized in that, in the emergency preparation mode, the mixing means is adjusted to a state where hot water can be supplied at a hot water supply setting temperature according to the hot water storage temperature of the hot water storage tank and the temperature of the tap water. The hot water storage and hot water supply device according to claim 1 or 2.