JP2021148383A - Hot water storage type water heater - Google Patents

Abstract

To provide a hot water storage type water heater capable of standing ready for handling the case of emergency in advance.SOLUTION: In a hot water storage type water heater 1 including a main heat source machine 3, a hot water tank 2, an auxiliary heat source machine 4, external communication means, and control means, performing hot water storage operation for storing hot water in the hot water tank 2 by using the main heat source machine 3, and supplying the stored hot water or hot water heated by the auxiliary heat source machine 4, the control means includes a normal mode for performing hot water storage operation in accordance with a user's use mode, and an emergency preparation mode for generating hot water, standing ready for emergency to store the hot water in the hot water tank, and shifts to the emergency preparation mode to store the hot water heated by the main heat source machine 3 or the auxiliary heat source machine 4 in the hot water tank 2 in the case of acquiring emergency information about weather or an infrastructure through external communication means in the normal mode or by user's operation.SELECTED DRAWING: Figure 2

Description

The present invention relates to a hot water storage and hot water supply device, and particularly to a hot water storage and hot water supply device that stores hot water in preparation for an emergency such as a disaster.

Conventionally, in order to prevent a fire when an earthquake occurs, a microcomputer meter that detects the shaking of the earthquake and stops the supply of fuel gas has been widely used. Since fuel gas cannot be used when an earthquake occurs, for example, when the shaking of an earthquake is detected as in Patent Document 1, ignition of the combustion type heat source machine is prohibited, and hot water is heated and stored by a heat pump heat source machine operated by electric power. Hot water supply devices are known.

Further, as in Patent Document 2, there is known a hot water storage hot water supply device that heats hot water with a heat pump heat source machine operated by electric power and stores hot water when a stoppage of fuel gas supply is detected. In general, a heat pump heat source machine having a smaller heating capacity than a combustion type heat source machine requires time to store hot water. Therefore, if hot water storage is started after an earthquake occurs as in Patent Documents 1 and 2, the power failure that may occur thereafter is sufficient. There is a risk that the amount of heat stored in the hot water cannot be secured.

On the other hand, as in Patent Document 3, there is known a bath hot water supply device provided with a broadcast receiving device for receiving an emergency warning broadcast such as a large-scale earthquake warning declaration and a tsunami warning, and storing hot water in a bathtub when the emergency warning broadcast is received. .. Hot water can be stored in the bathtub before water outages or power outages occur due to an earthquake or tsunami.

In addition, as in Patent Document 4, when water outage information due to drought or the like is acquired via an external communication network, hot water storage is stopped or hot water storage can be stopped so as to prevent the risk of hot water supply due to the inability to mix clean water. A hot water storage device that lowers the hot water storage temperature is known.

JP-A-2017-227401 Japanese Patent No. 5592249 Japanese Patent No. 4611947 JP-A-2007-232344

However, fuel gas supply outages, water outages, and power outages are not only due to earthquakes and associated tsunamis and droughts, but also due to typhoons and heavy rains that can be predicted in advance to some extent, and are systematically implemented for infrastructure renovation. It may be done. The hot water storage and hot water supply equipment is required to prepare in advance in case of an emergency in which hot water cannot be supplied because such fuel gas, clean water, and electric power cannot be used.

An object of the present invention is to provide a hot water storage and hot water supply device capable of preparing in advance in case of an emergency.

The hot water storage and hot water supply device of the invention of claim 1 includes a main heat source machine, a hot water storage tank, an auxiliary heat source machine, an external communication means, and a control means, and uses the main heat source machine to store hot water in the hot water storage tank. In the hot water storage hot water supply device that supplies hot water stored hot water or hot water heated by the auxiliary heat source machine, the control means has a normal mode in which the hot water storage operation is performed according to a user's usage mode and hot water in preparation for an emergency. The emergency preparation mode for generating and storing hot water in the hot water storage tank is provided, and the emergency information regarding the weather or infrastructure is acquired via the external communication means in the normal mode, or by the operation of the user. It is characterized in that it shifts to the time preparation mode and stores hot water heated by the main heat source machine or the auxiliary heat source machine in the hot water storage tank.

According to the above configuration, in the normal mode, hot water is stored in the hot water storage tank according to the usage mode of the user. Then, when emergency information about the weather or infrastructure is acquired via an external communication means in the normal mode, the mode shifts to the emergency preparation mode and the hot water generated in preparation for an emergency is stored in the hot water storage tank. Therefore, it is possible to prepare hot water in advance in case of an emergency.

In the invention of claim 1, the hot water storage device according to claim 2 is the main heat source machine or the auxiliary heat source machine based on the emergency information when the control means shifts to the emergency preparation mode. It is characterized by selecting one of them.
According to the above configuration, when shifting to the emergency preparation mode, the heat source machine used for hot water generation is selected based on the emergency information about the weather or infrastructure, depending on the time until the emergency when hot water cannot be generated. do. Therefore, hot water can be generated by a heat source machine suitable for preparing hot water depending on the situation.

In the invention of claim 1 or 2, the control means is heated by the hot water stored in the hot water storage tank or the auxiliary heat source machine in the emergency preparation mode. It is characterized by supplying the hot water to the bathtub.
According to the above configuration, it is possible to prepare hot water in advance, which is larger than the capacity of the hot water storage tank, in the emergency preparation mode.

In the invention of any one of claims 1 to 3, the hot water storage and hot water supply device of the invention of claim 4 includes a mixing means of mixing hot water and clean water to supply hot water of a hot water supply set temperature, and the control means is In the emergency preparation mode, the mixing means is adjusted to a state in which hot water can be supplied at a hot water supply set temperature according to the hot water storage temperature of the hot water storage tank and the temperature of clean 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 set temperature and supplied even in the event of a power failure. Therefore, high-temperature hot water can be prepared in the hot water storage tank to maximize the amount of hot water stored, and hot water can be safely supplied even in the event of a power failure.

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.

It is a figure which shows the hot water storage hot water supply apparatus connected to the external communication network which concerns on embodiment of this invention. It is a control flowchart in the normal mode and the emergency preparation mode which concerns on Example 1 of this invention. It is a control flowchart in the normal mode and the emergency preparation mode which concerns on Example 2 of this invention.

Hereinafter, modes for carrying out the present invention will be described. The following description of preferred embodiments is merely exemplary 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 described.
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 machine 3, an auxiliary heat source machine 4, and a control unit 5 (control means). The main heat source machine 3 circulates and heats the hot water in the hot water storage tank 2. The auxiliary heat source machine 4 is a combustion type heat source machine that burns fuel gas to heat hot water or clean water in the hot water storage tank 2. The control unit 5 controls the operation of the main heat source machine 3 and the auxiliary heat source machine 4 based on the control program and the setting parameters.

A main heat source machine going passage 6 for supplying hot water to the main heat source machine 3 is connected to the bottom of the hot water storage tank 2, and hot water heated by the main heat source machine 3 is returned to the hot water storage tank 2 at the upper part of the hot water storage tank 2. The main heat source unit return passage 7 is connected. A main heat source machine going temperature sensor 6a for detecting 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 machine return temperature sensor 7a for detecting the temperature of hot water heated by the main heat source machine 3 is provided in the main heat source machine return passage 7.

The main heat source machine 3 is, for example, a heat pump type heat source machine that is operated and heated by electric power. The hot water in the hot water storage tank 2 is circulated by a circulation pump (not shown) provided in the main heat source machine 3 or the main heat source machine going passage 6, and the hot water is heated by using the heat of the air to store the hot water. Since the main heat source machine 3 has a smaller heating capacity than the auxiliary heat source machine 4, hot water cannot be generated quickly, but the heating efficiency is high, the economy is economical, and the environmental load is low. The main heat source machine 3 may be, for example, one that generates heat by electric power to heat hot water, or may be one that heats hot water by utilizing 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. A water supply temperature sensor 8a for detecting the temperature of the supplied clean water is provided in the water supply passage 8 as shown by an arrow CW. A hot water discharge passage 9 for discharging hot water from the hot water storage tank 2 is connected to the upper portion (top) of the hot water storage tank 2.

In the hot water storage tank 2, a plurality of hot water storage temperature sensors 2a to 2e are arranged so as to be arranged 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 is covered with a heat insulating member (not shown) including the hot water storage temperature sensors 2a to 2e and the tank hot water temperature sensor 2f to prevent heat dissipation of the hot water stored. Further, an emergency drain plug (not shown) is provided so that the user can take out the hot water from the hot water storage tank 2 and use it when the water is cut off.

A mixing valve 10 (mixing means) is connected to the downstream end of the hot water outlet passage 9. The first branch passage 11 branched from the water supply passage 8 and the hot water supply passage 12 are connected to the mixing valve 10. The mixing valve 10 is configured so that the mixing ratio of the hot water supplied from the hot water outlet 9 and the low temperature clean water supplied from the first branch passage 11 can be adjusted. The hot water mixed by the mixing valve 10 is supplied to the hot water supply passage 12 and supplied from the hot water tap 13 and the like.

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

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

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

The hot water filling passage 18 branched from the hot water supply passage 12 is connected to the bathtub 19, and hot water is supplied to the bathtub 19 by opening the hot water filling valve 18a. The water level of the bathtub 19 is detected by the detection pressure of the water level sensor 18b arranged in the hot water filling passage 18. The drain plug 19a of the bathtub 19 drains the hot water of the bathtub 19 as shown by an 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 is a valve arranged in each part based on the detection temperature of the temperature sensor arranged in each part such as the hot water storage temperature sensor 2a, the detected flow rate of the hot water supply flow rate sensor 12b, the detected water level of the water level sensor 18b, and the like. Operates equipment such as pumps and pumps to perform various operation controls. Further, the control unit 5 is provided with a clock function, a timer function, and the like, and has a function of learning and memorizing the usage mode of the user's hot water supply.

The operation terminal 20 (external communication means) is attached to the control unit 5 in order to perform operation operations of the hot water storage and hot water supply device 1 normally installed outdoors, various setting operations such as hot water supply set temperature, and mode change operations from the room. Communication is connected. The operation terminal 20 has an operation unit, a display unit, a communication unit, and the like, 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 controller installed in the kitchen. Information such as the hot water supply set temperature and the operating status of the hot water storage and hot water supply device 1 is displayed on the display unit of the operation terminal 20.

Next, the hot water storage operation will be described.
For example, in the case of a heat pump heat source machine in which the main heat source machine 3 uses electric power to heat hot water, the control unit 5 predicts the hot water supply usage time and the hot water supply usage amount based on the user's hot water supply usage mode learned and memorized. , The hot water storage operation is controlled so that the hot water storage operation using the main heat source unit 3 is completed immediately before the predicted hot water supply use. Then, when the amount of heat corresponding to the predicted amount of hot water used is stored, the hot water storage operation is terminated. When the main heat source machine 3 heats hot water using the exhaust heat generated when the fuel gas is used to generate electricity, the hot water storage operation is performed according to the usage mode of the electric power of the user.

Next, the hot water supply operation will be described.
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 for supplying hot water at a hot water supply set temperature. In the hot water supply operation, the control unit 5 adjusts to the hot water supply set temperature by adjusting the mixing ratio of the mixing valve 10 based on the detection temperatures of the mixing valve inlet temperature sensor 9a, the water supply temperature sensor 8a, and the hot water supply 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 detected flow rate of 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 machine 3 is, for example, a heat pump heat source machine, in the hot water supply operation, the control unit 5 mixes, for example, the hot water supply usage time, the hot water supply flow rate detected by the hot water supply flow rate sensor 12b, the hot water supply usage time, the hot water supply flow rate, and the mixing valve 4. Learn and memorize the usage mode of the user regarding hot water supply including the amount of hot water discharged obtained from the ratio.

If the hot water storage tank 2 does not have hot water at a temperature that can be used for hot water supply, such as when the hot water stored in the hot water supply operation is used up, the control unit 5 drives the pump 17a and is supplied from the water supply passage 8. The hot water supply operation is performed using hot water obtained by heating the clean water with the auxiliary heat source machine 4. Further, for example, when the hot water supply set temperature is changed after the hot water is stored and the hot water is supplied at a high temperature that cannot be supplied by the stored hot water, the clean water or the stored hot water is heated by the auxiliary heat source machine 4 and used for the hot water supply.

Next, the hot water filling operation will be described.
The control unit 5 starts the hot water filling operation so that the hot water filling of the bathtub 19 is completed by the operation of the operation terminal 20 or at the hot water filling time set by the timer function. For example, the drain plug 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 machine 4 is used to bring hot water at a bathtub set temperature to a predetermined water level. Perform tension operation.

Next, the wireless home network will be described.
Although not shown, the wireless home network is connected to information terminals such as personal computers and smartphones in the home, and home appliances such as televisions and air conditioners by communication, and the operation terminal 20 is also connected by communication as shown in FIG. .. This wireless home network is constructed by the wireless router function of the line terminating device 31 for connecting to the Internet 30, or by the wireless router device connected to the line terminating device 31. As a result, the device connected to the wireless home network can use various services via the Internet 30. The hot water storage 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 described.
The external server 32 is installed, for example, by the provider (manufacturer) of the hot water storage device 1 so as to maintain an appropriate state of the hot water storage device 1 connected via the Internet 30, and provides information on the hot water storage device 1. to manage. The external server 32 provides weather information according to the installation area of the hot water storage device 1, information on infrastructure such as fuel gas, water, and electric power, or information for connecting to a provider that provides weather information and information on infrastructure. Is provided to the hot water storage and hot water supply device 1.

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

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

In S3, it is determined whether or not the current mode is the normal mode. If the determination of S3 is Yes, the process proceeds to S5, and if the determination of S3 is No, the process proceeds to S4, and after shifting to the normal mode, the process proceeds to S5. Then, in S5, the device waits in the normal mode in preparation for the hot water storage operation, the hot water supply operation, and the like, and 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 the hot water supply operation is not performed. For example, even if the mixing valve 10 becomes unadjustable due to a sudden power failure, hot water is stored. The hot water stored in the tank 2 is prevented from being supplied.

On the other hand, when the determination in S2 is Yes, in S6, it is determined whether or not the present is the emergency preparation mode. If the determination in S6 is Yes, the process proceeds to S15, and in S15, the device waits in the emergency preparation mode and returns in preparation for the hot water supply operation or the like. If the determination in S6 is No, the process proceeds to S7, and in S7, the mode shifts to the 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 higher than the temperature of the hot water stored in the hot water storage tank 2 so that hot water can be supplied at the hot water supply set temperature even if the mixing valve 10 becomes unadjustable due to a power failure. The mixing ratio of the mixing valve 10 is adjusted based on the temperature of water.

In S8, it is determined whether or not hot water can be stored in the hot water storage tank 2 by using the main heat source machine 3. It is determined whether or not a sufficient amount of heat can be stored by using the main heat source machine 3 with respect to the predicted typhoon approach time and the scheduled temporary supply stop time 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 machine, in general, when the main heat source machine 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 machine 4 When the above is used, the hot water storage tank 2 is filled with hot water in about 15 to 30 minutes.

If the determination in S8 is Yes, the process proceeds to S9, the main heat source machine 3 is selected as the heat source machine used in S9, and the process proceeds to S11. If the determination in S8 is No, the process proceeds to S10, the auxiliary heat source machine 4 is selected as the heat source machine used in S10, and the process proceeds to S11. Then, in S11, the hot water generated by using the selected heat source machine 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 the heat source machine so as to maximize the amount of heat stored in the hot water. Set. In the case of water outage, hot water may be stored at a set temperature for hot water supply so that hot water can be safely taken out from the emergency drain plug of the hot water storage tank 2.

In S12, it is determined whether or not the bathtub 19 can be filled with hot water by the 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 detection pressure of the water level sensor 18b and the open / closed state of the drain valve 19a. Further, the amount of heat stored is calculated based on the detected temperatures of the hot water storage temperature sensors 2a to 2e, and it is determined whether or not the amount of heat required for filling the hot water is stored. Further, it is determined whether or not the hot water heated by the auxiliary heat source machine 4 can be filled in the bathtub 19.

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

The hot water filling temperature at this time is the bathtub set temperature set by the user for bathing, but the user may set the bathtub set temperature in the emergency preparation mode according to the application. On the other hand, if the determination in S12 is No, the process proceeds to S14. 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 in the hot water storage tank 2 is completed. At this time, it may be determined by the amount of hot water stored corresponding to the detection temperature of the hot water storage temperature sensors 2a to 2e, and the hot water storage tank may be determined by the detection temperature of the main heat source machine forward temperature sensor 6a or the auxiliary heat source machine inlet temperature sensor 17b. 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 hot water storage, and if the determination in S14 is Yes, the process proceeds to S15. Then, in S15, it 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 an operation from the user's operation terminal 20 or the like.

At present, it is difficult to predict an earthquake, so it is not included in the emergency preparation mode. When the fuel gas supply is stopped due to an earthquake, the control unit 5 detects the fuel gas supply stop, or acquires the fuel gas supply stop information via the Internet 30, and shifts to the emergency mode. Prohibit the use of equipment that uses fuel gas. In this emergency mode, if the hot water storage operation by the main heat source unit 3 is possible, the hot water storage operation is performed, and if the hot water supply operation using the stored hot water is possible, hot water is supplied according to the hot water supply request.

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

In S22, it is determined whether or not the current mode is the normal mode. If the determination in S22 is No, the process proceeds to S23, and in S23, the mode shifts to the normal mode and proceeds to S24. Then, in S24, it waits in the normal mode and returns.

On the other hand, if the determination in S22 is Yes, the process proceeds to S7. Then, in S7, the mode shifts to the emergency preparation mode. The hot water preparation operation is performed in S7 to S15, but since it is the same as in the first embodiment, the description thereof will be omitted. The control unit 5 that has acquired the emergency information on the weather and infrastructure from the Internet 30 determines whether or not the main heat source unit 3 in S8 can store hot water, but the user who has acquired the emergency information makes the determination. The heat source machine used for hot water storage may be selected by operating the operation terminal 20.

The operation and effect of the hot water storage and hot water supply device 1 of the above embodiment will be described.
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 use of hot water supply. Then, when the emergency information about the weather or infrastructure is acquired via the operation terminal 20 (external communication means) in the normal mode, or by the operation of the user, the hot water generated by shifting to the emergency preparation mode and preparing for an emergency is used. Hot water is stored in the hot water storage tank 2. Therefore, it is possible to prepare hot water in advance in case of an emergency.

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

When the control unit 5 can fill the bathtub 19 with hot water stored in the hot water storage tank 2 or hot water heated by the auxiliary heat source machine 4 in the emergency preparation mode, the control unit 5 fills the bathtub 19 with hot water. Tension. Therefore, it is possible to prepare hot water in advance, which is larger than the capacity of the hot water storage tank 2 in the emergency preparation mode.

The control unit 5 adjusts the mixing valve 15 (mixing means) so that the hot water supply set temperature can be supplied according to the hot water storage temperature and the clean water temperature of the hot water storage tank 2 in the emergency preparation mode. Therefore, the hot water stored in the hot water storage tank 2 in the emergency preparation mode can be safely supplied by adjusting the hot water supply set temperature even in the event of a power failure. Therefore, high-temperature hot water can be prepared in the hot water storage tank 2 to maximize the amount of hot water stored, and hot water can be safely supplied even in the event of a power failure.

In addition, a person skilled in the art can carry out the embodiment in a form in which various modifications are added to the above embodiment without deviating from the gist of the present invention, and the present invention also includes such modified forms.

1: Hot water storage hot water supply device 2: Hot water storage tanks 2a to 2e: Hot water storage temperature sensor 3: Main heat source machine 4: Auxiliary heat source machine 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 return passage 7b: Main heat source machine return temperature sensor 8: Water supply passage 8a: Water supply temperature sensor 9: Hot water outlet temperature sensor 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 sensor 13: Hot water tap 14: Second branch passage 15: Three-way valve 16: Hot water branch passage 17: Auxiliary heat source machine 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 (4)

It is equipped with a main heat source machine, a hot water storage tank, an auxiliary heat source machine, an external communication means, and a control means. In a hot water storage hot water supply device that supplies hot water heated in
The control means includes a normal mode in which the hot water storage operation is performed according to a user's usage mode, 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 the emergency information about the weather or infrastructure is acquired via the external communication means in the normal mode, or by the operation of the user, the mode shifts to the emergency preparation mode, and the main heat source machine or the auxiliary heat source machine A hot water storage device for storing hot water heated by a hot water storage tank. The hot water storage hot water supply according to claim 1, wherein the control means selects either the main heat source machine or the auxiliary heat source machine based on the emergency information when shifting to the emergency preparation mode. Device. The control means according to claim 1 or 2, wherein the control means supplies the hot water stored in the hot water storage tank or the hot water heated by the auxiliary heat source machine to the bathtub in the emergency preparation mode. The hot water storage and hot water supply device described. Equipped with a mixing means that mixes hot water and clean water to generate hot water at the set temperature for hot water supply.
The control means is characterized in that, in the emergency preparation mode, the mixing means is adjusted so that hot water can be supplied at a hot water supply set temperature according to the hot water storage temperature of the hot water storage tank and the temperature of clean water. The hot water storage and hot water supply device according to any one of claims 1 to 3.

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