JP2022118553A - Storage type hot water supply device - Google Patents

Abstract

To provide a storage type hot water supply device advantageous in simultaneously executing a hot water storage operation prepared for suspension of water supply or power failure due to disaster, and preventing occurrence of hot water shortage at a normal time.SOLUTION: A storage type hot water supply device includes: heating means for heating water; a hot water storage tank for storing the hot water heated by the heating means; receiving means for receiving information on a disaster forecast for forecasting occurrence of disaster; and control means for executing a disaster forecast hot water storage operation for storing hot water of a disaster hot water storage temperature in the hot water storage tank, in a case when the disaster forecast of importance more than reference is issued. A value of the disaster hot water storage temperature can be set by using a user interface.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a hot water storage type hot water supply apparatus.

Patent Literature 1 listed below discloses a hot water supply system that boils hot water by setting the boiling temperature of a hot water storage tank to a low temperature when a seismic sensor as a disaster detection means detects an earthquake.

JP 2007-255753 A

By setting the boiling temperature to a low temperature in the event of a disaster and storing hot water, the temperature of the hot water will not be too high when the hot water in the hot water storage tank is taken out and used as domestic water in the event of a water outage or power outage. There are advantages. On the other hand, since the amount of heat stored in the hot water storage tank is small, there is a problem that the possibility of running out of hot water increases.

The present disclosure has been made to solve the above-mentioned problems, and it is possible to execute hot water storage operation in preparation for water outages or power outages due to disasters, and to prevent the occurrence of hot water shortages during normal times. To provide a hot water storage type hot water supply apparatus which is advantageous in the use of hot water.

A hot water storage type hot water supply apparatus according to the present disclosure includes a heating means for heating water, a hot water storage tank for storing hot water heated by the heating means, a receiving means for receiving disaster forecast information for predicting the occurrence of a disaster, and important and a control means for executing a disaster forecast hot water storage operation for storing hot water at a hot water storage temperature during a disaster in a hot water storage tank when a disaster forecast with a temperature higher than a standard is issued, and the value of the hot water storage temperature during a disaster is provided using a user interface. can be set.

According to the present disclosure, it is possible to provide a hot water storage type hot water supply apparatus that is advantageous in achieving both execution of hot water storage operation in preparation for water outages or power outages due to disasters and prevention of running out of hot water in normal times. becomes possible.

1 is a diagram showing a hot water storage type hot water supply apparatus according to Embodiment 1. FIG. 4 is a flowchart showing an example of processing executed by a control device when receiving means receives a disaster forecast;

Embodiments will be described below with reference to the drawings. Elements that are common or correspond to each figure are denoted by the same reference numerals, and their explanations are simplified or omitted.

Embodiment 1.
FIG. 1 is a diagram showing a hot water storage type hot water supply apparatus according to Embodiment 1. FIG. As shown in FIG. 1 , the hot water storage type hot water supply apparatus of the present embodiment includes a heat pump unit 100 driven by electric power and a hot water storage unit 200 having a hot water storage tank 11 . The heat pump unit 100 and the hot water storage unit 200 are connected via pipes 16a and 16k through which water flows, and electrical wiring (not shown). The hot-water storage type hot-water supply apparatus of the present embodiment may be, for example, a domestic one or a business-use one used in facilities or shops.

Inside the hot water storage tank 11, temperature stratification is formed in which the upper side has a high temperature and the lower side has a low temperature due to the difference in water density according to the temperature. Hot water storage tank 11 in the present embodiment is configured by a single container. As a modification, the hot water storage tank 11 may have a structure in which a plurality of containers are connected in series via pipes. In the plurality of containers, the lower part of the container on the upper layer side of the temperature stratification, ie, the high temperature side, communicates with the upper part of the container on the lower layer side of the temperature stratification, ie, the low temperature side, by a pipe.

The heat pump unit 100 includes devices such as a compressor 1, a water-refrigerant heat exchanger 2, an expansion valve 3, and an air heat exchanger 4. These devices are annularly connected by pipes or the like, and constitute a refrigerant circuit 101 in which the refrigerant is circulated by the compressor 1 . The refrigerant circuit 101 corresponds to a heat pump cycle that heats water. The water-refrigerant heat exchanger 2 exchanges heat between water and refrigerant, and has a water inlet and a water outlet. In the following description, the hot water heated by the heat pump unit 100 may be called "heated water". The water-refrigerant heat exchanger 2 heats water, which has flowed in through an inlet, with a refrigerant, and causes the heated water to flow out through an outlet. Also, the air heat exchanger 4 exchanges heat between the air and the refrigerant. The heat pump unit 100 further includes a fan 5 that blows outside air to the air heat exchanger 4 . In the present disclosure, the terms “water”, “hot water”, or “hot water” may include liquid water of any temperature, from low-temperature water to high-temperature water.

In addition to the hot water storage tank 11, the hot water storage unit 200 includes a circulation pump 6a, a reheating pump 6b, a switching valve 7, a switching valve 8, a switching valve 9, a mixing valve 10, a reheating heat exchanger 12, and the like. there is The circulation pump 6a circulates water (including heated water) to a hot water storage circuit 201 and a reheating circuit 202, which will be described later. The circulation pump 6 a forms part of the hot water storage circuit 201 and the reheating circuit 202 .

The reheating heat exchanger 12 is connected via a bath circulation circuit 91 to a bathtub 90 in the bathroom. When the reheating pump 6b provided in the bath circulation circuit 91 is operated, the bath circulation circuit 91 is opened so that the water flowing out of the bathtub 90 returns to the bathtub 90 via the reheating heat exchanger 12. flowing.

The switching valve 7 is composed of, for example, an electromagnetically driven four-way valve having four ports of A port, B port, C port and D port. The switching valve 7 constitutes a switching mechanism for switching the flow path of the heated water flowing out from the outlet of the water-refrigerant heat exchanger 2 to the switching valve 8 and the low-temperature water return port 11 e located in the lower part of the hot water storage tank 11 . there is The switching valve 7 constitutes a switching mechanism for returning the hot water flowing out from the high-temperature water outlet 11a in the upper part of the hot water storage tank 11 to the low-temperature water return port 11e.

The switching valve 8 is composed of, for example, an electromagnetically driven four-way valve having four ports of E port, F port, G port, and H port. The switching valve 8 divides the flow path of the water flowing in from the E port into a reheating return port 11c at an intermediate height portion of the hot water storage tank 11, a high temperature water outflow port 11b at an upper portion of the hot water storage tank 11, and a reheating heat exchange port 11c. A switching mechanism for switching to the device 12 is configured. The switching valve 9 is composed of, for example, an electromagnetically driven three-way valve or the like having three ports of an I port, a J port, and a K port. The switching valve 9 allows the water flowing out from the water intake port 11f in the lower part of the hot water storage tank 11 to pass through the circulation pump 6a and flow into the water-refrigerant heat exchanger 2. It constitutes a switching mechanism for switching between a flow path state in which water passes through the circulation pump 6 a and flows into the water-refrigerant heat exchanger 2 .

The mixing valve 10 has three ports, an L port, an M port and an N port. Mixing valve 10 mixes or selects medium-temperature water taken out from medium-temperature water outlet 11 d in the middle height portion of hot water storage tank 11 and low-temperature water from the water supply end connected to the water source. drain to The hot water storage tank 11 stores heated water. The hot water storage tank 11 is located below the hot water storage tank 11, in addition to the high temperature water outlet 11a, the high temperature water outlet 11b, the reheating return port 11c, the medium temperature water outlet 11d, the low temperature water return port 11e, and the water intake 11f. 11 g of water supply ports are provided. The water supply port 11g is connected to the water supply end via a pipe 16p. Low-temperature water supplied from the water supply end flows into the hot water storage tank 11 through the pipe 16p.

The outflow port of the water-refrigerant heat exchanger 2 is connected to the A port of the switching valve 7 via a pipe 16a. The B port of the switching valve 7 is connected to the E port of the switching valve 8 via a pipe 16b. The F port of the switching valve 8 is connected to the high-temperature water outlet 11a through the pipes 16c and 16d. In addition, the F port is connected to the inlet on the primary side of the reheating heat exchanger 12 via the pipes 16c and 16e. A primary-side outflow port of the reheating heat exchanger 12 is connected to the J port of the switching valve 9 via a pipe 16f. In addition, the outlet on the primary side of the reheating heat exchanger 12 is connected to a flow path connecting the medium-temperature water outlet 11d and the L port of the mixing valve 10 via a pipe 16g. The I port of the switching valve 9 is connected to the water intake 11f via a pipe 16h. The K port of the switching valve 9 is connected to the suction port of the circulation pump 6a via a pipe 16j. A discharge port of the circulation pump 6a is connected to an inlet of the water-refrigerant heat exchanger 2 via a pipe 16k. A discharge port of the circulation pump 6a is connected to the C port of the switching valve 7 via a pipe 16l. A D port of the switching valve 7 is connected to the low-temperature water return port 11e via a pipe 16m. The H port of the switching valve 8 is connected to the high-temperature water inlet/outlet 11b via pipes 16n and 16q. The G port of the switching valve 8 is connected to the reheating return port 11c via a pipe 16o.

A circulation pump 6a, a hot water storage tank 11, pipes 16a, 16b, 16h, 16j, 16k, 16n, 16q, and switching valves 7, 8, 9 supply heated water flowing out of the water-refrigerant heat exchanger 2 into the hot water storage tank 11. It constitutes a hot water storage circuit 201 for storing hot water.

The circulation pump 6a, the reheating heat exchanger 12, the pipes 16b, 16d, 16e, 16f, 16j, 16l, 16o, and the switching valves 7, 8, 9 use the reheating heat exchanger 12 to heat the water to be heated on the load side. A reheating circuit 202 for heating is configured.

The circulation pump 6a does not necessarily need to be installed in the hot water storage unit 200, and may be installed in the heat pump unit 100 side. The high-temperature water inlet/outlet 11b, the medium-temperature water outlet 11d, the pipe 16q, the mixing valve 10, and the hot water supply mixer 15 constitute a hot water supply circuit 203 that takes out hot water from the hot water storage tank 11 and supplies hot water to the bathtub 90 or the hot water supply end. ing.

When the bath solenoid valve 19 opens, the hot water flowing out from the hot water supply/mixing unit 15 flows through the bath circulation circuit 91 into the bathtub 90 . The hot water supply/mixing unit 15 , the bath solenoid valve 19 , and the bath circulation circuit 91 correspond to hot water filling means for causing the hot water in the hot water storage tank 11 to flow into the bathtub 90 .

In the present embodiment, the value of the heating capacity of refrigerant circuit 101 of heat pump unit 100 may be changeable. The heating capacity corresponds to the amount of heat given to water by the heat pump unit 100 per unit time. The heating capacity may be adjusted by adjusting the rotation speed of the compressor 1 .

Next, the control system of the hot water storage type hot water supply apparatus will be described. In the following description, the temperature of the heated water flowing out from the water-refrigerant heat exchanger 2 of the heat pump unit 100 is called "boiling temperature". The heat pump unit 100 includes an incoming water temperature sensor 13a that detects the temperature of water flowing into the water-refrigerant heat exchanger 2, a boiling temperature sensor 13b that detects the boiling temperature, and an outside air temperature around the heat pump unit 100. and an outside air temperature sensor 13c. The boiling temperature sensor 13b is arranged near the outlet of the water-refrigerant heat exchanger 2 . The refrigerant circuit 101 also includes a discharge temperature sensor 13d that detects the temperature of the refrigerant discharged from the compressor 1, a suction temperature sensor 13e that detects the temperature of the refrigerant sucked into the compressor 1, and an air heat exchanger 4. and an evaporating temperature sensor 13f for detecting the temperature of the refrigerant at a position serving as an inlet or an intermediate portion of the. A plurality of stored hot water temperature sensors 13g, 13h, 13i, and 13j corresponding to stored hot water temperature detection means are installed in the hot water storage tank 11 at different height positions, and detect the water temperature in the hot water storage tank 11 at each installation location. do.

The hot water storage type hot water supply apparatus of the present embodiment includes control device 14 mounted on heat pump unit 100 and control device 50 mounted on hot water storage unit 200 . Controller 14 and controller 50 each include, for example, at least one memory and at least one processor. The control device 14 and the control device 50 are connected so as to be able to communicate bidirectionally. In the present embodiment, control device 14 and control device 50 cooperate to control the operation of the hot water storage type hot water supply apparatus. The control device 14 and the control device 50 correspond to control means for controlling a boiling operation in which the hot water heated by the heat pump unit 100 , that is, the heated water flows into the hot water storage tank 11 .

Hereinafter, for convenience of explanation, the control device 14 and the control device 50 are collectively referred to simply as the "control device 50". That is, in the following description, it is assumed that the control device 50 executes the processing, but any processing may be executed by the control device 14 alone, or may be executed by the control device 50 alone. Alternatively, the control device 14 and the control device 50 may work together. Note that the control means of the hot water storage type hot water supply apparatus in the present disclosure is not limited to the configuration in which a plurality of control devices cooperate as in the present embodiment, and may be configured by a single control device.

A remote controller 51 is installed inside a building in which a hot water storage type hot water supply apparatus is used. The remote control 51 may be installed, for example, on the wall of the kitchen, living room, bathroom, or the like. Two-way communication is possible between the control device 50 and the remote controller 51 by wired communication or wireless communication. A remote control 51 is an example of a user interface. The remote control 51 has a display 51a for displaying information and an operating section 51b operated by a user. The remote controller 51 may have a touch screen that functions as both the display 51a and the operation unit 51b. By operating the remote controller 51, a person such as a user can remotely control the hot water storage type hot water supply apparatus and perform various settings. The display 51a functions as a notification means and a display means for notifying information to people such as users. The remote controller 51 may include, in addition to the display 51a, voice reporting means for reporting information by voice. A plurality of remote controllers 51 installed at different locations may be able to communicate with the control device 50 . A network-enabled device, such as a television or smart speaker, may be used as the user interface. A user interface other than the remote control 51 may have a display as notification means or an audio notification means. Controller 50 and remote control 51 or other user interface may communicate via the Internet or a local area network.

The control device 50 receives outputs from various sensors provided in the hot water storage type hot water supply apparatus, information on user's operations on the remote control 51 and other user interfaces, and the like. The control device 50 controls the operations of the heat pump unit 100 and the hot water storage unit 200 based on these pieces of input information. For example, the control device 50 controls the operating states of the compressor 1, the circulation pump 6a, and the reheating pump 6b, the opening degree of the expansion valve 3, the switching valve 7, the switching valve 8, the switching valve 9, and the mixing valve 10. control the direction of the flow path or switching position. Further, the control device 50 executes a boiling operation, a reheating operation, and the like. The control device 50 may control the boiling temperature and the heating capacity of the refrigerant circuit 101 during the boiling operation.

Control device 50 may calculate the amount of heat used for hot water supply (hereinafter referred to as “heat amount used for hot water supply”). For example, the control device 50 detects the water supply temperature detected by the water supply temperature sensor 13k, the hot water supply temperature detected by the hot water supply temperature sensor 13l, the hot water supply temperature detected by the bath hot water supply temperature sensor 13m, and the hot water supply flow rate detected by the hot water supply flow rate sensor 17a. and the hot water supply flow rate detected by the bath hot water supply flow rate sensor 17b.

The control device 50 has a function of learning the amount of heat used for hot water supply by storing data related to the amount of heat used for hot water supply every day during a past predetermined period (for example, the past two weeks). For example, the control device 50 learns the amount of heat used for hot water supply by statistically processing the amount of heat used for hot water supply during a predetermined period in the past. Further, control device 50 may learn the amount of heat used for hot water supply for each hour of the day.

Next, the operation of the boiling operation of the hot water storage type hot water supply apparatus will be described. In the boiling operation, the refrigerant circuit 101 and the hot water storage circuit 201 are operated. When the circulation pump 6a operates, the water in the hot water storage tank 11 is introduced into the water-refrigerant heat exchanger 2 from the water intake 11f through the pipes 16h, 16j, 16k. This water is heated by the gas refrigerant in the water-refrigerant heat exchanger 2 and flows out of the water-refrigerant heat exchanger 2 as heated water. This heated water passes through the pipes 16a, 16b, 16n, and 16q and flows into the hot water storage tank 11 from the high-temperature water inlet/outlet 11b. In this manner, when the boiling operation is performed, hot water is accumulated in the hot water storage tank 11 while maintaining a temperature distribution state in which the upper portion is high temperature water and the lower portion is low temperature water.

The controller 50 feedback-controls the rotational speed of the circulation pump 6a so that the boiling temperature detected by the boiling temperature sensor 13b becomes equal to the target boiling temperature. The control device 50 may change the target boiling temperature so that the target heat storage amount can be stored in the hot water storage tank 11 . The control device 50 may determine the target heat storage amount based on the learned amount of heat used for hot water supply in the past, or may determine the target heat storage amount based on the details of the operation of the remote control 51 or the like. The boiling operation in which the control device 50 stores the target heat storage amount in the hot water storage tank 11 during normal times is hereinafter referred to as "normal boiling operation".

In the following description, the area including the location of the hot water storage type hot water supply apparatus is referred to as "located area". The location area may be, for example, in units of prefectures or in units of municipalities. The control device 50 stores location information. The control device 50 may be configured to automatically detect the location using GPS (Global Positioning System). In addition, the control device 50 may store location information input to the remote controller 51 or other user interface.

The external server 61 distributes disaster forecast information that predicts the occurrence of a disaster. In the present disclosure, a disaster may be a disaster caused by at least one of earthquake, typhoon, heavy rain, flood, storm, snowstorm, heavy snow, storm surge, thunder, and tornado, for example. The disaster forecast may be, for example, weather warnings, weather warnings, emergency warnings, earthquake early warnings, or similar information. The disaster forecast may be information provided by the Japan Meteorological Agency or Meteorological Observatory.

The control device 50 can communicate with an external server 61 via a communication line 60 . The communication line 60 may be an Internet line. The control device 50 may communicate with the communication line 60 via a home broadband router (not shown). The external server 61 may be a cloud server consisting of multiple servers.

The control device 50 comprises receiving means 52 . The receiving means 52 receives information on disaster forecast delivered from the external server 61 via the communication line 60 . Based on the information received by the receiving means 52, the control device 50 can detect that the disaster forecast for the local area has been issued or that the disaster forecast for the local area has been cancelled.

The control device 50 may communicate with a portable terminal 62 possessed by a user who is away from home via a communication line 60 . The mobile terminal 62 may be, for example, a smart phone or a tablet terminal. The portable terminal 62 may be configured to be used as a user interface of the hot water storage type hot water supply apparatus. When the user who has the mobile terminal 62 is at home, the control device 50 may communicate with the mobile terminal 62 without going through the communication line 60 .

Control device 50 in the present embodiment can execute the disaster forecast hot water storage operation instead of the normal boiling operation when a disaster forecast with a degree of importance equal to or higher than a standard is issued for the local area. The disaster forecast hot water storage operation is an operation for storing hot water as domestic water in the hot water storage tank 11 in preparation for a water outage or power outage due to a disaster. In the present disclosure, the temperature of hot water stored in the hot water storage tank 11 in the disaster forecast hot water storage operation is referred to as "disaster hot water storage temperature". The user can use a user interface such as the remote control 51 or the portable terminal 62 to set the value of the emergency hot water storage temperature in advance. In this case, the user interface may present the user with a plurality of options for the emergency hot water storage temperature value. Alternatively, the system may be configured so that the user can input the value of the stored hot water temperature in the event of a disaster into the user interface.

In the disaster forecast hot water storage operation, the control device 50 may perform the boiling operation while adjusting the rotational speed of the circulation pump 6a so that the boiling temperature becomes substantially equal to the emergency hot water storage temperature. The emergency hot water storage temperature may be lower than the target boiling temperature for the normal boiling operation.

For example, the user may set a temperature that does not cause burns even if the hot water is directly discharged as the emergency hot water storage temperature. The “temperature at which hot water does not burn even when directly tapped” may be, for example, a temperature within the range of 30°C to 60°C, a temperature within the range of 30°C to 50°C, or a temperature from 30°C to 50°C. Temperatures in the range up to 40° C. are also possible. When the water supply or power failure occurs, the hot water supply/mixing unit 15 cannot adjust the temperature of the hot water supply. In the disaster forecast hot water storage operation, if the hot water of a temperature that does not cause burns even if hot water is directly discharged is stored in the hot water storage tank 11, the hot water in the hot water storage tank 11 is too hot even if it is discharged as it is when water supply interruption or power failure occurs. There is an advantage that it is easy to use hot water because there is no need to do so.

The control device 50 executes the disaster forecast hot water storage operation when the degree of importance of the disaster forecast issued for the local area is equal to or higher than the standard, and the degree of importance of the disaster forecast issued for the local area meets the standard. If it is less than that, the normal boiling operation is executed without executing the disaster forecast hot water storage operation. Weather advisories, weather warnings, and emergency warnings become more important in this order. For example, when a special warning is issued to the local area, the control device 50 may assume that the degree of importance of the disaster forecast is equal to or higher than the standard, and execute the disaster forecast hot water storage operation. If a weather warning has been issued for the local area but no special warning has been issued, the control device 50 determines that the degree of importance of the disaster forecast does not meet the standard, and executes the disaster forecast hot water storage operation. The normal boiling operation may be performed without

If the importance of the disaster forecast is equal to or higher than the standard, the possibility of water outage or power outage is relatively high. On the other hand, if the importance of the disaster forecast is lower than the standard, the possibility of water outage or power outage is relatively low, so it can be said that the necessity of executing the disaster forecast hot water storage operation is low. The amount of heat stored in the hot water storage tank 11 after executing the disaster forecast hot water storage operation may be less than the amount of heat stored in the hot water storage tank 11 after performing the normal boiling operation. Therefore, running out of hot water in the hot water storage tank 11 is more likely to occur when the disaster forecast hot water storage operation is performed than when the normal boiling operation is performed. In the present embodiment, when the importance of the disaster forecast is lower than the standard, that is, when the possibility of water outage or power outage is relatively low, the control device 50 can execute the disaster forecast hot water storage operation. Execute normal boiling operation without Therefore, it is possible to reliably prevent the hot water storage tank 11 from running out of hot water when the possibility of water supply interruption or power failure occurring is relatively low.

Note that the criteria for the degree of importance of disaster forecast are not limited to the above examples. For example, when no special warning is issued for the local area but a weather warning is issued, the control device 50 assumes that the importance of the disaster forecast is higher than the standard, and executes the disaster forecast hot water storage operation. You may When a weather warning is issued for the local area but neither a weather warning nor an emergency warning is issued, the controller 50 deems that the degree of importance of the disaster forecast does not meet the standard, and performs the disaster forecast hot water storage operation. You may perform normal boiling operation without performing. The user may be able to change in advance, using a user interface such as the remote controller 51 or the mobile terminal 62, the disaster forecast importance criteria for determining whether to execute the disaster forecast hot water storage operation.

Not only is it possible to set a temperature that does not cause burns even if the hot water is directly discharged as the emergency hot water storage temperature value, but also the user can use the user interface such as the remote control 51 or the mobile terminal 62 to set the maximum hot water storage temperature as the emergency hot water storage temperature. can be set as the value of The maximum hot water storage temperature may be, for example, 90°C. By setting the maximum stored hot water temperature as the value of the stored hot water temperature during a disaster, it is possible to maximize the amount of heat stored in the hot water storage tank 11 after the disaster forecast hot water storage operation is executed. For example, if there is a water storage tank other than the hot water storage tank 11 at the user's residence, the high temperature hot water discharged from the hot water storage tank 11 is taken out from the water storage tank in the event of a water outage or power outage. You can use it by diluting it with water and adjusting the temperature. In such a case, setting the maximum stored hot water temperature to the emergency stored hot water temperature is advantageous in preventing running out of hot water in the hot water storage tank 11 .

If hot water having a temperature higher than the emergency hot water storage temperature is stored in the hot water storage tank 11 before executing the disaster forecast hot water storage operation, the control device 50 opens the bath electromagnetic valve 19 to release the hot water in the hot water storage tank 11. The disaster forecast hot water storage operation may be executed after at least part of the water has flowed into the bathtub 90 . In this way, by executing the disaster forecast hot water storage operation after the hot water in the hot water storage tank 11 whose temperature is higher than the emergency hot water storage temperature is consumed for filling the bathtub 90, the hot water at the emergency hot water storage temperature is stored in the hot water storage tank. 11 can be reliably stored. When automatically filling the bathtub 90 with hot water as described above before executing the disaster forecast hot water storage operation, the control device 50 notifies the user interface display such as the remote controller 51 or voice notification means. It is desirable to notify the user using This prevents the user from misunderstanding that the operation of filling the bathtub 90 with hot water is a malfunction.

If hot water having a temperature higher than the hot water storage temperature during a disaster is stored in the upper part of the hot water storage tank 11 before executing the disaster forecast hot water storage operation, the control device 50 stores hot water before executing the disaster forecast hot water storage operation. The hot water temperature in the upper part of the hot water storage tank 11 may be lowered by performing a stirring operation for stirring the hot water in the tank 11 . For example, in the stirring operation, the control device 50 operates the circulation pump 6a, and the low-temperature water in the lower part of the hot water storage tank 11 passes through the water intake 11f and the pipes 16h, 16j, 16l, 16b, 16n, and 16q, The hot water may flow into the upper part of the hot water storage tank 11 from the high temperature water inlet/outlet 11b. Alternatively, in the stirring operation, the control device 50 operates the circulation pump 6a, and the high temperature water in the upper part of the hot water storage tank 11 passes through the high temperature water outlet 11a and the pipes 16d, 16e, 16f, 16j, 16l, and 16m. Alternatively, the hot water may flow into the lower portion of the hot water storage tank 11 from the low-temperature water return port 11e. By executing the disaster forecast hot water storage operation after the stirring operation, it is possible to store hot water at the emergency hot water storage temperature in the entire inside of the hot water storage tank 11 .

Hot water supply may become unnecessary for some reason, such as when all the users who live together are absent due to travel, for example. The hot water storage type hot water supply apparatus is configured so that the user can set suspension of the boiling operation during a period when hot water supply is not required using a user interface such as the remote control 51 or the mobile terminal 62 .

If it is assumed that a disaster forecast with a degree of importance higher than the standard is issued during the period set by the user to suspend the heating operation, continue the suspension of the heating operation, or suspend the heating operation. The user may be able to select in advance whether to cancel and execute the disaster forecast hot water storage operation using a user interface such as the remote control 51 or the portable terminal 62 . This improves convenience.

Further, when a disaster forecast with a degree of importance equal to or higher than the standard is actually issued during the period in which the user has set the suspension of the boiling operation, the control device 50 continues the suspension of the boiling operation. Alternatively, the user may be asked using a user interface such as the remote control 51 or the portable terminal 62 whether to cancel the suspension of the boiling operation and execute the disaster forecast hot water storage operation. As a result, the disaster forecast hot water storage operation can be reliably performed even during the suspension period of the boiling operation if the user determines that it is necessary at that time.

Further, when a disaster forecast with a degree of importance equal to or higher than the standard is actually issued during the period in which the user has set the suspension of the boiling operation, the control device 50 continues the suspension of the boiling operation. Alternatively, the user may be asked whether to cancel the suspension of the boiling operation and execute the disaster forecast hot water storage operation using the remote control 51 or other user interface provided inside the building. After that, when there is no response from the user, the control device 50 notifies the user whether to continue the suspension of the boiling operation or cancel the suspension of the heating operation and execute the disaster forecast hot water storage operation. may be transmitted to the mobile terminal 62 owned by the user. This notification may be a push notification. As a result, even when the user is out during the pause period of the boiling operation, the disaster forecast hot water storage operation can be reliably executed if the user determines that it is necessary at that time.

When the disaster forecast hot water storage operation is being performed, the control device 50 preferably notifies the user of the fact that the disaster forecast hot water storage operation is being performed by displaying it on the display of the user interface such as the remote control 51. . This can give the user a sense of security.

When the disaster forecast hot water storage operation is being executed, the control device 50 makes the voice notification means of the user interface such as the remote control 51 emit a sound to inform the user that the disaster forecast hot water storage operation is being performed. may be notified. As a result, the user can quickly feel a sense of security. However, there is a possibility that some users may find the notification by voice annoying. In view of this point, the user can use a user interface such as the remote control 51 to stop the operation of notifying the fact that the disaster forecast hot water storage operation is being performed by voice in advance. may be provided. As a result, the user who finds the notification by sound annoying can stop the notification sound in advance so that the notification sound is not emitted.

FIG. 2 is a flowchart showing an example of processing executed by the control device 50 when the receiving means 52 receives a disaster forecast. When the receiving means 52 receives the disaster forecast, in step S1, the control device 50 determines whether or not the importance of the disaster forecast is equal to or higher than a standard. For example, if the received disaster forecast is a special warning, it is determined that the degree of importance is above the standard, and if the received disaster forecast is a weather advisory, it is determined that the degree of importance does not meet the standard. If the degree of importance of the disaster forecast does not meet the criteria, the control device 50 determines not to execute the disaster forecast hot water storage operation, and terminates the processing of this flowchart.

If it is determined in step S1 that the degree of importance of the disaster forecast is equal to or higher than the standard, the process proceeds to step S2, and the control device 50 determines that at least one of the stored hot water temperature sensors 13g, 13h, 13i, and 13j detects The stored hot water temperature is compared with the stored hot water temperature during a disaster. If the detected stored hot water temperature is lower than the disaster stored hot water temperature, the process proceeds to step S4, and the controller 50 executes the disaster forecast hot water storage operation.

On the other hand, if it is detected in step S2 that hot water with a temperature higher than the emergency hot water storage temperature is stored in the hot water storage tank 11, the process proceeds to step S3. By opening the door 19 and filling the bathtub 90 with hot water, the hot water in the hot water storage tank 11 whose temperature is higher than the hot water storage temperature at the time of disaster is consumed. After that, the control device 50 performs the comparison in step S2 again, and if the detected stored hot water temperature is lower than the disaster stored hot water temperature, the process proceeds to step S4 to execute the disaster forecast hot water storage operation.

1 compressor, 2 water-refrigerant heat exchanger, 3 expansion valve, 4 air heat exchanger, 5 fan, 6a circulation pump, 6b reheating pump, 7, 8, 9 switching valve, 10 mixing valve, 11 hot water storage tank, 11a hot water outlet 11b hot water outlet 11c reheating return 11d middle water outlet 11e low temperature water return 11f water intake 11g water supply 12 reheating heat exchanger 13a inlet water temperature sensor 13b Boiling temperature sensor 13c Outside air temperature sensor 13d Discharge temperature sensor 13e Suction temperature sensor 13f Evaporation temperature sensor 13g, 13h, 13i, 13j Storage hot water temperature sensor 13k Water supply temperature sensor 13l Hot water temperature sensor 13m Bath hot water temperature Sensor 14 Control Device 15 Hot Water Mixing Unit 17a Hot Water Flow Sensor 17b Bath Hot Water Flow Sensor 19 Bath Solenoid Valve 50 Control Device 51 Remote Controller 51a Display 51b Operation Unit 52 Receiving Means 60 Communication Line 61 External server 62 Portable terminal 90 Bathtub 91 Bath circulation circuit 100 Heat pump unit 101 Refrigerant circuit 200 Hot water storage unit 201 Hot water storage circuit 202 Reheating circuit 203 Hot water supply circuit

Claims (10)

a heating means for heating water;
a hot water storage tank for storing hot water heated by the heating means;
Receiving means for receiving information related to disaster forecasts that forecast the occurrence of disasters;
a control means for executing a disaster forecast hot water storage operation for storing hot water at a disaster hot water storage temperature in the hot water storage tank when the disaster forecast with a degree of importance equal to or higher than a standard is issued;
with
A hot water storage type hot water supply apparatus capable of setting the value of the emergency hot water storage temperature using a user interface. The disaster forecast hot water storage operation is executed when a special warning is issued as the disaster forecast, and the disaster forecast hot water storage operation is not performed when the disaster forecast with a lower importance than the special warning is issued. 2. The hot water storage type hot water supply device according to 1. 3. The hot water storage type hot water supply apparatus according to claim 1, wherein at least a maximum hot water temperature and a temperature at which hot water is not burned even if the hot water is directly discharged can be selected using the user interface as the emergency hot water temperature value. . hot water filling means for flowing hot water from the hot water storage tank into the bathtub;
hot water temperature detection means for detecting the temperature of hot water stored in the hot water storage tank;
with
If hot water having a temperature higher than the emergency hot water storage temperature is stored in the hot water storage tank before the disaster forecast hot water storage operation is executed, the hot water in the hot water storage tank is allowed to flow into the bathtub, and then the disaster warning hot water storage operation is performed. The hot water storage type hot water supply apparatus according to any one of claims 1 to 3, wherein the hot water storage prediction operation is executed. Assuming that the disaster forecast with the degree of importance equal to or higher than the standard is given during the period set by the user to suspend the boiling operation for heating the water in the hot water storage tank by the heating means, the boiling 5. Any one of claims 1 to 4, wherein a user can select in advance whether to continue the suspension of the heating operation or to cancel the suspension of the heating operation and execute the disaster forecast hot water storage operation. The hot water storage type hot water supply device according to the above item. When the disaster forecast with the degree of importance equal to or higher than the standard is issued during a period set by the user to suspend the boiling operation for heating the water in the hot water storage tank by the heating means, the boiling 6. A user interface is used to inquire of a user whether to continue the suspension of the operation or to cancel the suspension of the boiling operation and execute the disaster forecast hot water storage operation. The hot water storage type hot water supply device according to . Using the user interface provided inside the building, the user is asked whether to continue the suspension of the boiling operation or to cancel the suspension of the heating operation and execute the disaster forecast hot water storage operation. after that, when there is no reply from the user, a notification asking the user whether to continue the suspension of the boiling operation or cancel the suspension of the heating operation and execute the disaster forecast hot water storage operation; 7. The hot water storage type hot water supply apparatus according to claim 6, wherein the information is transmitted to a portable terminal carried by the user. 8. The hot water storage type hot water supply apparatus according to any one of claims 1 to 7, further comprising display means for displaying that the disaster forecast hot water storage operation is being performed while the disaster forecast hot water storage operation is being performed. . 9. The apparatus according to any one of claims 1 to 8, further comprising voice notification means capable of notifying by voice that the disaster forecast hot water storage operation is being performed while the disaster forecast hot water storage operation is being performed. hot water storage type water heater. 10. The hot water storage type hot water supply apparatus according to claim 9, further comprising voice stopping means for allowing a user to stop the notification by voice.

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