JP7225576B2 - hot water system - Google Patents

Description

The present invention relates to a hot water supply system that remotely controls a hot water supply apparatus via an external communication network.

2. Description of the Related Art In recent years, a system for remote-controlling a hot water supply apparatus having a bath function, a floor heating function, etc. from outside has been studied. According to this system, for example, it is possible to fill hot water in a bath in the house at a desired timing from outside, or to set a floor heating system in the house. Patent Literature 1 below describes a hot water supply apparatus that performs control by distinguishing between communication from a home remote controller and communication from a mobile terminal device.

Japanese Patent No. 6142681

When the hot water supply apparatus is operated by the mobile terminal device, the mobile terminal device can be used both inside and outside the home. Here, when the mobile terminal device is used to operate the water heater outside the home, the operator sets the water heater without knowing how the water heater is used in the home. In this case, for example, if the hot water supply temperature suddenly changes during hot water supply by remote control from outside the home, the actual user of the hot water supply will experience significant discomfort and inconvenience.

SUMMARY OF THE INVENTION In view of such problems, it is an object of the present invention to provide a hot water supply system capable of properly remote-controlling a water heater from inside and outside a building to which hot water is to be supplied, using a portable terminal device.

A hot water supply system according to a main aspect of the present invention includes a hot water supply apparatus installed in a predetermined building, a portable terminal device having a function of remotely operating the water supply apparatus via an external communication network outside the building, and It is determined whether the mobile terminal device exists inside or outside the building, and if the mobile terminal device exists outside the building, the target item for the remote operation is determined to be the mobile terminal device inside the building. and a control unit that controls the remote operation so that there are fewer items than the target items of the remote operation, if any. The control unit acquires an IP address of the hot water supply apparatus, and determines whether the mobile terminal device is inside the building based on a communication result when the mobile terminal device communicates with the acquired IP address. and outside.

According to the hot water supply system according to this aspect, the number of items to be remotely controlled when the portable terminal device is outside the building is less than the number of items to be remotely controlled when the portable terminal device is inside the building. A remote operation is controlled. As a result, it is possible to prevent the settings of the hot water supply apparatus from being changed unexpectedly by remote control from outside the building using the portable terminal device for setting items that are not desirable to be changed. Therefore, the portable terminal device can be used to properly remotely control the water heater from inside and outside the building.
Further, when the mobile terminal device is inside the building to which hot water is to be supplied, even if the router to which the water heater is connected and the router to which the mobile terminal device is connected are different, the connection is made via these two routers. Then, the portable terminal device can communicate with the IP address of the hot water supply device. On the other hand, when the mobile terminal device is outside the building to which hot water is to be supplied, communication from the mobile terminal device to the IP address of the water heater cannot normally be established due to IP address rules. Therefore, the control unit can appropriately determine whether the mobile terminal device is inside or outside the building to which hot water is to be supplied, based on the communication result of the communication from the mobile terminal device to the IP address of the hot water supply device. For example, the control unit can determine that the mobile terminal device is outside the target building when there is no response from the hot water supply device to the communication based on the IP address.

In the hot water supply system according to this aspect, the control unit acquires an identifier that is individually assigned to each router, and in the remote operation, the identifier of the router to which the water heater is connected and the mobile terminal device to which the mobile terminal device is connected. match with the identifier of the router, determine that the mobile terminal device is inside the building.

When the mobile terminal device is connected to the same router as the router to which the water heater is connected, the mobile terminal device is located inside the building where this router is installed, that is, the building where the water heater is installed. Probability is high. Therefore, according to this configuration, it is possible to properly determine that the portable terminal device is inside the building to which hot water is to be supplied, and to properly perform remote control using the portable terminal device.

In this case, the router may be a wireless router having a wireless communication function, and the identifier may be a BSSID individually assigned to the wireless router. This ensures that the router can be identified.

For example, the control unit may be configured to determine that the portable terminal device exists outside the building when there is no response from the water heater in communication based on the IP address.

In this case, the control unit causes the portable terminal device to transmit information including identification information of the water heater in the communication based on the IP address, It can be configured to reduce the target items in the remote control when the identification information does not match.

According to this configuration, even if communication based on the IP address is established, the target item for remote operation is set based on whether or not the identification information matches. Setting operations can be eliminated.

In this configuration, "reducing the number of target items for remote operation" means reducing the number of target items that can be remotely operated compared to the case where both pieces of identification information match. It also includes setting the number of items to zero, that is, prohibiting remote operation.

In the above configuration, when the remote controller of the water heater is connected to an external communication network via a router, the IP address may be the IP address set for the remote controller.

The hot water supply system according to this embodiment may be configured to include a server that is connected to the external communication network and manages the remote operation. In this case, the server may constitute at least part of the controller and may be configured to perform at least part of the control in the controller.

In this case, the server obtains, for example, an identifier that is individually assigned to each router, and uses the identifier of the router to which the water heater is connected and the identifier to which the mobile terminal device is connected in the remote operation. match, the portable terminal device is determined to be inside the building.

According to this configuration, when the water heater and the mobile terminal are connected to the same router in the building, the server determines whether the router identifiers obtained from the water heater and the mobile terminal match. It is possible to properly determine whether or not the terminal device exists inside the building.

As described above, according to the present invention, it is possible to provide a hot water supply system capable of appropriately remote-controlling a hot water supply apparatus from the inside and outside of a building to which hot water is to be supplied using a portable terminal device.

The effects and significance of the present invention will become clearer from the description of the embodiments shown below. However, the embodiment shown below is merely one example of the implementation of the present invention, and the present invention is not limited to the embodiments described below.

FIG. 1 is a diagram showing the configuration of a hot water supply system according to Embodiment 1. FIG. FIG. 2 is a diagram showing circuit blocks of each device that constitutes the hot water supply system according to the first embodiment. 3(a) and 3(b) are flowcharts showing steady control in the kitchen remote control and the server, respectively, according to the first embodiment. FIG.3(c) is a figure which shows the structure of the information managed in a server. FIGS. 4A and 4B are flow charts showing control of the mobile terminal device and the server in remote operation, respectively, according to the first embodiment. FIG. 5A is a diagram schematically showing an operation screen displayed on the mobile terminal device during remote operation according to the first embodiment. FIG. 5(b) is a diagram showing items that can be remotely controlled in the in-home mode and the out-of-home mode according to the first embodiment. FIG. 6A is a flowchart showing control of a mobile terminal device in remote operation according to Modification 1 of Embodiment 1. FIG. FIG. 6B is a flowchart showing a setting command reception process of the server according to Modification 1 of Embodiment 1. FIG. FIGS. 7A to 7D are diagrams showing examples of notification screens displayed when an item that cannot be set is operated, according to Modification 1 of Embodiment 1. FIG. FIG. 8 is a flowchart showing control of a kitchen remote control in remote control according to Modification 2 of Embodiment 1. FIG. FIG. 9 is a diagram showing the configuration of a hot water supply system according to Embodiment 2. As shown in FIG. 10(a) and 10(b) are flowcharts showing control of the mobile terminal device and the kitchen remote control in remote operation, respectively, according to the second embodiment. FIGS. 11A and 11B are diagrams showing packet configurations of confirmation requests and confirmation responses, respectively, transmitted from the portable terminal device and the kitchen remote controller during remote operation according to the second embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Embodiment 1>
FIG. 1 is a diagram showing the configuration of a hot water supply system 1 according to Embodiment 1. As shown in FIG.

As shown in FIG. 1 , hot water supply system 1 includes hot water supply apparatus 10 , router 20 , mobile terminal device 30 , external communication network 40 , and server 50 .

A water heater 10 includes a water heater 11 and remote controllers 12 and 13 . The water heater 11 is a gas water heater that supplies hot water using gas as a fuel. Hot water generated by the water heater 11 is supplied to a kitchen faucet, a bathtub, a faucet, and the like through pipes connected to the hot water supply ports 11a. When the water heater 11 has a floor heating function, a bathroom heating function, and a heating function using a panel heater, hot water is supplied from the water heater 11 to devices that realize these functions.

Remote controllers 12 and 13 are connected to water heater 10 and used to make various settings for each function of water heater 10 . The remote controllers 12 and 13 have display units 121 and 131 and input units 122 and 132, respectively. By operating the input units 122 and 132 in accordance with the screens displayed on the display units 121 and 131, the operator can arbitrarily set hot water filling, hot water supply temperature adjustment, and the like. The remote controller 12 is installed in a bathroom, and the remote controller 13 is installed in a kitchen or the like.

Hereinafter, the remote controller 12 installed in the bathroom will be referred to as "bathroom remote controller 12", and the remote controller 13 installed in the kitchen or the like will be referred to as "kitchen remote controller 13".

The router 20 is a wireless router for connecting each device existing in the building (here, the home H10) to the server 50 via the external communication network 40. FIG. A unique BSSID (Basic Service Set Identifier) is assigned to the router 20 as an identifier that is individually assigned to each router.

The kitchen remote control 13 is connected to the router 20 by wireless communication. Moreover, when the mobile terminal device 30 exists in the home H10, the mobile terminal device 30 is connected to the router 20 by wireless communication and can communicate with the server 50 . The mobile terminal device 30 is, for example, a mobile phone. In addition, the portable terminal device 30 may be another portable terminal device such as a portable tablet terminal. External communication network 40 is, for example, the Internet.

A server 50 for managing remote operation of water heater 10 is connected to external communication network 40 . Kitchen remote controller 13 communicates with server 50 via router 20 and external communication network 40 . When the mobile terminal device 30 exists in the home H10 , the mobile terminal device 30 communicates with the server 50 via the router 20 and the external communication network 40 . Also, when the mobile terminal device 30 is outside the home, the mobile terminal device 30 is connected to the external communication network 40 via the router 60 or the base station 70 installed outside, and communicates with the server 50 .

In the configuration of FIG. 1, the operator can remotely operate the hot water supply apparatus 10 using the portable terminal device 30 both inside the home H10 and outside the home. That is, regardless of whether the mobile terminal device 30 is inside the home H10 or outside the home, the setting request input to the mobile terminal device 30 by the operator is once transmitted to the server 50 via the external communication network 40. . In response, server 50 transmits the received setting request to water heater 10 associated in advance with mobile terminal device 30 that received the setting request. As a result, the setting request is transmitted to kitchen remote controller 13 of corresponding water heater 10 via external communication network 40 and router 20 . As a result, the settings requested by the operator are applied to hot water supply device 10 .

FIG. 2 is a diagram showing circuit blocks of each device constituting the hot water supply system 1. As shown in FIG.

Water heater 11 includes control unit 111 , storage unit 112 , and communication unit 113 . Control unit 111 includes a CPU (Central Processing Unit), and controls each unit in water heater 11 according to a program stored in storage unit 112 . The storage unit 112 has a memory and stores a predetermined control program. The communication unit 113 communicates with the bathroom remote controller 12 and the kitchen remote controller 13 under the control of the control unit 111 .

The bathroom remote controller 12 includes a control unit 123 , a storage unit 124 and a communication unit 125 in addition to the display unit 121 and the input unit 122 described above. Display unit 121 is configured by, for example, a liquid crystal panel. The input unit 122 has various operation buttons. The display unit 121 may be a touch panel. The control unit 123 has a CPU and performs predetermined control according to a program stored in the storage unit 124 . The storage unit 124 has a memory and stores a predetermined control program. Communication unit 125 communicates with water heater 11 under the control of control unit 123 .

The kitchen remote controller 13 includes the display unit 131 and the input unit 132 described above, as well as a control unit 133 , a storage unit 134 and a communication unit 135 . Display unit 131 is configured by, for example, a liquid crystal panel. The input unit 132 has various operation buttons. The display unit 131 may be a touch panel. The control unit 133 has a CPU and performs predetermined control according to a program stored in the storage unit 134 . The storage unit 134 has a memory and stores a predetermined control program. The communication unit 135 communicates with the water heater 11 under the control of the control unit 133 .

Furthermore, the kitchen remote controller 13 includes a wireless communication section 136 . Here, the wireless communication unit 136 is a wireless communication module capable of wireless communication with the router 20 . The wireless communication unit 136 (wireless communication module) is assigned an IP address (private IP address) for specifying a device on a LAN (Local Area Network) set in the home H10.

The mobile terminal device 30 includes a display section 301 , an input section 302 , a control section 303 , a storage section 304 and a wireless communication section 305 . Display unit 301 is configured by, for example, a liquid crystal panel. The input unit 132 includes various operation buttons and a touch panel laminated on the display unit 301 . The control unit 303 has a CPU and performs predetermined control according to a program stored in the storage unit 304 . The storage unit 304 has a memory and stores a predetermined control program. The wireless communication section 305 communicates with the router 20 under the control of the control section 303 . A wireless communication unit 305 is a wireless communication module capable of wireless communication with the router 20 . An IP address is also assigned to the wireless communication unit 305 .

The server 50 includes a control section 501 , a storage section 502 and a communication section 503 . The control unit 501 has a CPU and performs predetermined control according to a program stored in the storage unit 502 . Storage unit 502 includes a memory and a hard disk, and stores predetermined control programs and databases. The communication unit 503 performs predetermined control according to control from the control unit 501 .

3(a) and 3(b) are flow charts showing steady control in the kitchen remote control 13 and the server 50, respectively.

Referring to FIG. 3(a), control unit 133 of kitchen remote controller 13 transmits state information indicating the current setting state of water heating apparatus 10 each time predetermined time T elapses (S101: YES). Together with the information, it is transmitted to the server 50 via the router 20 (S102). At this time, the router 20 simultaneously transmits its own identifier BSSID to the server 50 . Thus, the current setting state of water heater 10, the identification information of kitchen remote control 13, and the BSSID (identifier) of router 20 are transmitted from router 20 to server 50 at regular intervals.

Referring to FIG. 3(b), when control unit 501 of server 50 receives the state information from router 20 (S201: YES), it updates the state information of kitchen remote control 13 stored in storage unit 502. (S202). At this time, at the same time, the control unit 501 updates the BSSID (identifier) of the router 20 linked to the kitchen remote controller 13 by using the BSSID (identifier) received from the router 20 . In this way, the status information and the BSSID (identifier) of the router 20 managed by the server 50 for each hot water supply device 10 are successively updated every predetermined time T defined in step S101 of FIG. 3(a).

FIG. 3(c) is a diagram showing the structure of information managed by the server 50. As shown in FIG.

Server 50 stores the management information shown in FIG. 3C for each hot water supply apparatus 10 in storage unit 502 as a database. The management information includes a remote controller ID, a BSSID, a mobile ID, an outdoor item, an indoor item, and status information.

Here, the remote controller ID is identification information of the kitchen remote controller 13 included in the water heater 10 . BSSID is the identifier of the router 20 to which the kitchen remote controller 13 is connected. The mobile ID is identification information of the mobile terminal device 30 registered for remotely operating the water heater 10 . Here, n mobile terminal devices 30 are registered. The out-of-home item is a setting item that can be remotely operated in an out-of-home mode, which will be described later. The in-home item is a setting item that can be remotely controlled in the in-home mode, which will be described later.

The BSSID and status information are acquired from the kitchen remote controller 13 and updated as needed under the control shown in FIG. 3(b). The remote controller ID and the mobile ID are registered in the server 50 when the hot water supply system 1 is introduced. The out-of-home item and the in-home item are registered in server 50 at the time of introduction of hot water supply system 1 or the like according to the functions executable in home H10 where water heater 10 is installed and the items thereof.

Next, control at the time of remote operation in hot water supply system 1 will be described.

FIGS. 4A and 4B are flow charts respectively showing control of the mobile terminal device 30 and the server 50 in remote operation.

Referring to FIG. 4A, when the operator launches an application for remote control on mobile terminal device 30, controller 303 of mobile terminal device 30 requests server 50 to connect. to send. The connection request includes identification information (mobile ID) of the mobile terminal device 30 . The connection request is transmitted from the router to which the mobile terminal device 30 is connected at that time to the server 50 via the external communication network 40 . At that time, the BSSID (identifier) of the router is transmitted from the router to the server 50 (S301).

Referring to FIG. 4B, when control unit 501 of server 50 receives a connection request from mobile terminal device 30 (S401: YES), it extracts identification information (mobile ID) of mobile terminal device 30 from the connection request. Then, the management information (see FIG. 3(c)) of the hot water supply device 10 corresponding to the extracted identification information (portable ID) is identified. Then, the control unit 501 determines whether or not the BSSID included in the management information matches the BSSID received together with the connection request (S402).

Here, when the mobile terminal device 30 is in the home H10, the mobile terminal device 30 transmits a connection request to the server 50 via the router 20 in the home H10. Therefore, in this case, the BSSID (identifier) of the router 20 installed in the home H10 is transmitted together with the connection request. Therefore, the BSSID received by the server 50 together with the connection request matches the BSSID included in the management information. As a result, the determination in step S402 becomes YES.

On the other hand, when the mobile terminal device 30 is outside the home, the mobile terminal device 30 transmits a connection request to the server 50 via the router 60 or the base station 70 different from the router 20 of the home H10. Therefore, in this case, a BSSID (identifier) different from that of the router 20 of the home H10 is sent to the server 50 together with the connection request. Therefore, the BSSID received by the server 50 together with the connection request does not match the BSSID included in the management information. As a result, the determination in step S402 is NO.

If the determination in step S402 is YES, the control unit 501 sets the remote control mode to the indoor mode (S403). If the determination in step S402 is NO, the control unit 501 sets the remote control mode to the remote control mode (S404). Then, control unit 501 transmits a response including the set mode (mode information) and the state information of hot water supply apparatus 10 to portable terminal device 30 (S405). This response is received by the control unit 303 of the mobile terminal device 30 in step S302 of FIG. 4(a). After that, the server 50 executes a process of receiving a setting command from the mobile terminal device 30 (S406).

Referring to FIG. 4A, when control unit 303 of portable terminal device 30 receives a response from server 50 (S302: YES), it refers to the mode (in-home mode/out-of-home mode) included in the response, Depending on the mode, setting items that can be selected during remote operation are determined (S303). Here, the setting items that can be selected in the in-home mode and the setting items that can be selected in the out-of-home mode are stored in advance in the storage unit 304 of the mobile terminal device 30 . Of these two setting item groups stored in the storage unit 304, the control unit 303 selects the setting item group corresponding to the mode included in the response received from the server 50 as a setting item group selectable during remote operation. select.

Here, the group of setting items that can be selected in the in-home mode are all items associated with all the functions that can be executed in the in-home H10 where the water heater 10 is installed. In addition, in the setting item group selectable in the case of the out-of-home mode, some items are excluded from all the items associated with all the functions that can be executed in the home H10 in which the water heater 10 is installed. The remaining items. Therefore, the number of setting item groups in the out-of-home mode is smaller than the number of setting item groups in the in-home mode.

Note that the items excluded in the out-of-home mode are the hot water supply temperature change, the bath temperature change, the bath water level change, etc., and the functions of the water heater 10 corresponding to the setting items are already used or used in the home H10. It is assumed that it is not desirable to change the setting abruptly when the setting is about to be changed.

After determining a group of selectable setting items in this manner, the control unit 303 causes the display unit 301 to display an operation screen for accepting remote operation, and accepts setting operation by remote operation (S304). This operation screen is configured to accept settings for the selectable setting item group determined in step S303 and not to accept settings for other items. That is, in the home mode, the operation screen is configured to accept settings for all items, and in the out-of-home mode, the operation screen is configured to accept settings for items except some items.

FIG. 5A is a diagram schematically showing an operation screen 600 displayed on the mobile terminal device 30 during remote operation. FIG. 5B is a diagram showing an example of setting items that can be remotely operated in the indoor mode and the remote mode.

In the example of FIG. 5(b), in the home H10 where the water heater 10 is installed, the floor heating function, the bathroom heating function and the heating function can be executed in addition to the hot water supply function and the bath function. In indoor mode, all items associated with these functions can be set. The remaining items can be set except for the temperature change item in the function and the water change item in the bath function.

Referring to FIG. 5(a), operation screen 600 is divided into areas 610, 620, and 630. In FIG.

Area 610 includes a mode display portion 611, a hot water supply temperature setting portion 612, a bath temperature setting portion 613, a bath water level setting portion 614, a bathtub image 615, an enter button 616, and an end button 617. there is The mode display section 611 displays whether the current operation mode is the in-home mode or the out-of-home mode based on the mode information included in the response received in step S302 of FIG. 4(a). Hot water supply temperature setting unit 612, bath temperature setting unit 613, and bath water level setting unit 614 each set the current hot water supply temperature, bath The set state of temperature and bath water level is indicated. In the bathtub image 615, the current setting state of the bath water level is displayed as an image of water stored in the bathtub.

Here, when the operation mode is the indoor mode, the hot water supply temperature setting unit 612, the bath temperature setting unit 613, and the bath water level setting unit 614 are activated in an operable state. In this case, the confirm button 616 is similarly enabled. The operator can change the hot water supply temperature, the bath temperature, and the bath water level by touching the hot water supply temperature setting portion 612, the bath temperature setting portion 613, and the bath water level setting portion 614. FIG.

For example, when the operator touches these setting sections, up/down keys are displayed directly below them. Each time the operator touches the up/down key, the numerical value of each setting section increases or decreases. In this way, the operator can change the setting value for the desired setting section. After that, when the operator touches the confirm button 616, the change of these items is confirmed.

When the operation mode is the out-of-home mode, hot water supply temperature setting unit 612, bath temperature setting unit 613, and bath water level setting unit 614 are disabled and cannot be operated. In this case, the confirm button 616 is similarly disabled. In FIG. 5A, since the operation mode is the outdoor mode, hot water supply temperature setting section 612, bath temperature setting section 613, bath water level setting section 614, and enter button 616 are all disabled. In this case, the operator cannot change the hot water supply temperature, the bath temperature and the bath water level by touching the hot water supply temperature setting part 612, the bath temperature setting part 613 and the bath water level setting part 614. FIG.

Area 620 includes automatic bath setting section 621 , reheating setting section 622 , and bath cleaning setting section 623 . The automatic bath setting unit 621 is a setting button for filling the bathtub with hot water at the set bath temperature and bath water level. The reheating setting section 622 is a setting button for setting the reheating of the bath. The bath cleaning setting section 623 is a setting button for automatically performing bath cleaning.

The automatic bath setting unit 621, the reheating setting unit 622, and the bath cleaning setting unit 623 are always operable under the conditions shown in FIG. enabled.

The operator can select functions by these setting sections by touching the automatic bath setting section 621, the reheating setting section 622, and the bath washing setting section 623. FIG. When these setting portions are touched again, the selection is canceled. The selected setting part is highlighted so that the selection can be visually recognized. In the example of FIG. 5A, the automatic bath setting section 621 is selected. After that, the operator can confirm the selected setting item by touching the confirmation button 616 .

An area 630 includes four buttons 631 to 634 for switching functions to be operated. In the example of FIG. 5A, a button 631 is selected for operating the bath function. Therefore, in areas 610 and 620, setting items corresponding to the bath function are displayed as operation targets.

When the operator touches button 632, setting items corresponding to the bathroom heating function are displayed in areas 610 and 620 as objects to be operated. When the operator touches button 633, setting items corresponding to the heating function are displayed in areas 610 and 620 as operation targets, and when button 634 is touched, setting items corresponding to the floor heating function are displayed in areas 610 and 620. The item is displayed as an operation target. In these cases as well, according to the conditions of FIG. Activated.

After the above operation is performed, when the confirmation button 616 is touched, the control unit 303 transmits a setting command corresponding to the item operated by the operator to the server 50 in step S304 of FIG. . In response to this, the control unit 501 of the server 50 transmits a setting request including the received setting command to the control unit 133 of the kitchen remote control 13 in step S406 of FIG. 4(b). As a result, hot water supply device 10 is set according to the remote operation.

When ending the remote operation, the operator touches the end button 617 on the operation screen 600 of FIG. 5(a). As a result, the control unit 303 determines YES in step S305 of FIG. 4A, and transmits an end notification to the server 50 (S306). At this time, the operation screen 600 in FIG. 5A is closed at the same time. Thus, the remote operation control in the mobile terminal device 30 ends. Upon receiving the end notification from the mobile terminal device 30 (S407: YES), the control unit 501 of the server 50 ends the control of the remote operation. As a result, the remote operation control in hot water supply system 1 ends.

<Effect of Embodiment 1>
According to this embodiment, the following effects can be obtained.

Remote operation is controlled so that the number of remote operation target items when the mobile terminal device 30 is outside the home is smaller than the remote operation target items when the mobile terminal device 30 is inside the home H10. As a result, when the functions of water heater 10 have already been used or are about to be used in home H10, setting items that are not preferable to be changed can be unexpectedly changed by remote control from outside the home. can be suppressed from being changed. Therefore, portable terminal device 30 can be used to properly remotely control hot water supply device 10 from inside and outside the home.

Further, as shown in FIG. 4B, control unit 501 determines that the identifier (BSSID) of router 20 to which water heating apparatus 10 is connected and the identifier (BSSID) of the router to which mobile terminal device 30 is connected. If they match, it is determined that the mobile terminal device 30 is present in the home H10, and the home mode is set. As a result, it is possible to properly determine that the mobile terminal device 30 is inside the home H10 (inside the building to which hot water is to be supplied), and to properly switch between the indoor mode and the outdoor mode. Therefore, portable terminal device 30 can be used to properly remotely control hot water supply device 10 from inside and outside the home.

Further, as described with reference to FIG. 5(a), the control unit 303 of the mobile terminal device 30 causes the mobile terminal device 30 to set a target item that can be remotely controlled on the operation screen 600 used for remote control. It changes depending on whether it exists in H10 (inside the building) or outside the house. As a result, the operator can grasp the target items that can be remotely controlled from the operation screen 600 whether the operator is inside the home H10 or outside the home. Therefore, the operator does not erroneously set a setting item that cannot be set during remote operation from outside the home. Therefore, the operator can smoothly and properly perform remote operation based on the operation screen 600 .

<Modification 1 of Embodiment 1>
In Embodiment 1 above, when the mobile terminal device 30 is outside the home, the setting items that can be operated on the operation screen 600 of the mobile terminal device 30 are restricted. All setting items are set to be operable in the mobile terminal device 30 regardless of whether it is outside or inside the house. That is, in Modification 1, the operation screen 600 is not changed between the in-home mode and the out-of-home mode. In Modification 1, the server 50 determines whether or not the setting command received from the mobile terminal device 30 is a setting command that can be permitted depending on the operation mode (in-home mode/out-of-home mode), and the setting command can be permitted. Otherwise, the server 50 refuses to accept the setting command.

In this case, the control in the mobile terminal device 30 is changed as shown in FIG. 6(a). In the control of FIG. 6A, step S303 of FIG. 4A is omitted and step S311 is added. By omitting step S303, the operation screen 600 displayed in step S304 is set so that all setting items can be operated regardless of the operation mode (in-home mode/out-of-home mode). For example, hot water supply temperature setting unit 612, bath temperature setting unit 613, bath water level setting unit 614, and confirm button 616 shown in FIG. enabled.

Also, in this case, the setting command acceptance process in step S406 of FIG. 4B is executed according to the flowchart of FIG. 6B. That is, when the control unit 501 of the server 50 receives a setting command from the mobile terminal device 30 (S501: YES), the received setting command is permitted by the operation mode set in steps S403 and S404 of FIG. 4B. It is determined whether or not it is a setting command to obtain (S502).

For example, if control unit 501 receives a setting command for changing the temperature of hot water supply when the operation mode is the outdoor mode, control unit 501 determines NO in step S502. If the operation mode is the in-home mode, the control unit 501 determines YES in step S502 for any setting command.

If the determination in step S502 is YES, the controller 501 of the server 50 transmits a setting request including the received setting command to the controller 133 of the kitchen remote controller 13 (S503). As a result, hot water supply device 10 is set according to the remote operation. Furthermore, control unit 501 transmits to portable terminal device 30 a notification indicating that the setting for hot water supply apparatus 10 by remote control has been completed (S504). This completes the setting command acceptance process.

If the determination in step S502 is NO, the control unit 501 of the server 50 does not send a setting request including the received setting command to the control unit 133 of the kitchen remote control 13, and gives a notification indicating that the setting command is not accepted. to the mobile terminal device 30 (S505). In this case, setting according to the remote control is not performed for hot water supply device 10 . Thus, the setting command acceptance process ends.

The control unit 303 of the mobile terminal device 30 determines whether or not the setting command has been accepted by the server 50 based on the notifications transmitted in steps S504 and S505 (S311). If the setting command is accepted, the control unit 303 advances the process to step S305. On the other hand, when the setting command is not accepted, the control unit 303 causes the display unit 301 to display a notification screen to notify that fact.

FIGS. 7A to 7D are diagrams showing examples of notification screens, respectively.

FIGS. 7A to 7D show a notification screen 710 when an operation to change the bath temperature, the bath water level, the hot water supply temperature, and the floor heating temperature is performed in the outdoor mode, respectively. ~740. Notification screens 710 to 740 include notification texts 711 to 741 indicating that these changes cannot be performed outside the home, and OK buttons 712 to 742, respectively. The operator refers to the notice sentences 711 to 741 and understands that these operations cannot be accepted from outside the home. Thereafter, the operator touches OK buttons 712-742. Accordingly, the control unit 303 advances the process to step S305. Note that a similar notification screen is displayed when an operation for changing the bathroom heating temperature and an operation for changing the heating temperature are performed.

Also in this modification, the same effects as in the first embodiment can be obtained.

<Modification 2 of Embodiment 1>
In Modification 1 above, the server 50 determines whether or not the setting command is a setting command that can be permitted depending on the operation mode (in-home mode/out-of-home mode). The determination may be made in kitchen remote control 13 of water heater 10 .

FIG. 8 is a flowchart showing control in the control unit 133 of the kitchen remote control 13 in remote control according to Modification 2 of Embodiment 1. FIG.

In this case, when transmitting the setting command, the control unit 501 of the server 50 sets the BSSID (identifier) of the router to which the mobile terminal device 30 is connected and the BSSID (identifier) of the router 20 to which the kitchen remote controller 13 is connected. ) to the controller 133 of the kitchen remote controller 13 .

Upon receiving the setting request from the server 50 (S601), the control unit 133 of the kitchen remote controller 13 determines whether or not the two BSSIDs (identifiers) included in the setting request match (S602). , the operation mode (in-home mode/out-of-home mode) is set (S603, S604). Further, the control unit 133 determines whether or not the setting item of the received setting command is a setting command that can be permitted depending on the operation mode (in-home mode/out-of-home mode) (S605).

If the received setting command is a setting command that can be permitted (S605: YES), the control unit 133 performs setting based on this setting command, and transmits a notification indicating that the setting is permitted to the server 50 (S606). ). On the other hand, if the received setting command is not a permissible setting command (S605: NO), the control unit 133 does not perform the setting according to the setting command, and transmits to the server 50 a notification indicating that the setting is rejected. (S607). This completes the processing for the setting request.

The notifications transmitted in steps S606 and S607 are transmitted from the server 50 to the mobile terminal device 30. FIG. In response to this, the control unit 303 of the mobile terminal device 30 performs the process of step S311 in FIG. 6(a).

Even with this configuration, the same effects as those of the first embodiment can be obtained.

It should be noted that the mobile terminal device 30 may determine whether the mobile terminal device 30 is inside or outside the home and set the operation mode (in-home mode/out-of-home mode) based on the determination. In this case, for example, the BSSID (identifier) of the router to which the mobile terminal device 30 is connected and the BSSID (identifier) of the router 20 to which the kitchen remote control 13 is connected are included in the response to the connection request sent from the server 50. be included. Then, the control unit 303 of the mobile terminal device 30 determines whether the mobile terminal device 30 is inside or outside the home depending on whether or not the two received BSSIDs (identifiers) match. Based on, the operation mode (in-home mode/out-of-home mode) is set. Subsequent processing is the same as that after step S303 in FIG.

Even with this configuration, the same effects as those of the first embodiment can be obtained.

<Embodiment 2>
In the first embodiment described above, it is determined whether the mobile terminal device 30 is inside the home H10 or outside the home H10 depending on whether the router identifiers (BSSID) to which the kitchen remote controller 13 and the mobile terminal device 30 are connected match. rice field. In contrast, in the second embodiment, the IP address of the kitchen remote controller 13 is used to determine whether the portable terminal device 30 is inside the home H10 or outside the home.

FIG. 9 is a diagram showing the configuration of hot water supply system 1 according to Embodiment 2. As shown in FIG.

As shown in FIG. 9, in the second embodiment, two routers 20 and 21 are installed in the home H10. A kitchen remote controller 13 is connected to the router 20 as in the first embodiment. The mobile terminal device 30 is set to be connected to the router 21 in the home H10. Routers 20 and 21 are connected to an external communication network 40 . Also, the routers 20 and 21 are connected to each other. Also, the router 21 knows the IP addresses of the devices connected to the router 20 .

The server 50 also holds the IP address of the kitchen remote controller 13 as the management information shown in FIG. 3(c). Here, the IP address is an IP address (private IP address) for specifying a device on the LAN set in the home H10. The control unit 133 of the kitchen remote controller 13 transmits the state information and its own IP address to the server 50 in step S102 of FIG. 3(a). When the control unit 501 of the server 50 receives the IP address together with the state information from the kitchen remote controller 13 in step S201 of FIG. 3B, the control unit 501 updates the IP address included in the management information to the received IP address.

FIGS. 10A and 10B are flow charts showing control of the portable terminal device 30 and the kitchen remote controller 13 in remote operation, respectively, according to the second embodiment.

Referring to FIG. 10( a ), when the operator launches an application for remote control on mobile terminal device 30 , control unit 303 of mobile terminal device 30 instructs server 50 to A request for obtaining the IP address of the remote controller 13 is transmitted (S701). This acquisition request includes the identification information (mobile ID) of the mobile terminal device 30 . After that, the control unit 303 waits for reception of the IP address (S702).

Upon receiving the acquisition request from the mobile terminal device 30, the control unit 501 of the server 50, based on the identification information (mobile ID) of the mobile terminal device 30 included in the acquisition request, converts the IP address associated with the identification information. It extracts from the management information and transmits the extracted IP address to the mobile terminal device 30 .

Thereby, the control unit 303 of the mobile terminal device 30 receives the IP address from the server 50 (S702: YES). Then, the control unit 303 transmits a confirmation request to the received IP address (S703).

FIG. 11(a) is a diagram showing the packet configuration of the confirmation request.

The confirmation request is sent by an IP packet. The IP header includes a destination IP address, a source IP address, transmission control data, and the like. The TCP header includes control data and the like used in TCP (Transmission Control Protocol). The TLS header contains information for constructing an encrypted communication channel by a TLS (transport layer security) protocol. The data portion following the TLS header stores the notification type and an identification number (IoT_ID) on the server 50 for managing the kitchen remote controller 13 . Here, the type of notification is a confirmation request. The identification number is also received from the server 50 in the mobile terminal device 30 when the IP address is received in step S702 of FIG. 10(a).

Here, when the mobile terminal device 30 is in the home H10, the confirmation request transmitted from the mobile terminal device 30 is received by the kitchen remote controller 13 via the router 21 installed in the home H10. Therefore, in this case, a response to the confirmation request is transmitted from the kitchen remote controller 13 to the mobile terminal device 30 via the routers 21 and 22 . On the other hand, if the portable terminal device 30 is outside the home, the confirmation request is not received by the kitchen remote controller 13 because it cannot be connected to the external communication network 40 depending on the IP address (private IP address). Therefore, in this case, no response to the confirmation request is sent from the kitchen remote controller 13 to the mobile terminal device 30 .

The control unit 303 of the mobile terminal device 30 determines whether the mobile terminal device 30 is inside H10 or not, depending on whether or not a response to the confirmation request is received from the kitchen remote control 13 within a predetermined time (for example, 5 seconds) (S704). Determine if there is Then, if the control unit 303 does not receive a response to the confirmation request within the predetermined time (S704: NO), the control unit 303 determines that the mobile terminal device 30 is out of the house, and sets the operation mode to the out-of-home mode (S707). ). On the other hand, if a response to the confirmation request has been received within the predetermined time (S704: NO), the control unit 303 further executes the process of step S705, and according to the content of the result field included in the received confirmation response , the operation mode is set to either the in-home mode or the out-of-home mode (S706, S707).

Here, referring to FIG. 10(b), a process of generating an acknowledgment in the kitchen remote controller 13 will be described.

When the control unit 133 of the kitchen remote controller 13 receives the confirmation request transmitted from the mobile terminal device 30 in step S703 of FIG. 10A (S801: YES), it extracts the identification number (IoT_ID) from the confirmation request (S802 ), and compares the extracted identification number (IoT_ID) with its own identification number (IoT_ID) (S803). The identification number (IoT_ID) of kitchen remote controller 13 is stored in storage unit 134 in advance.

If these two identification numbers (IoT_ID) match (S804: YES), the control unit 133 adds information indicating matching to the result field of the confirmation response (S805), and transmits the confirmation response to the mobile terminal device 30. (S807). On the other hand, if these two identification numbers (IoT_ID) do not match (S804: NO), the control unit 133 adds information indicating the mismatch to the result field of the confirmation response (S806), and sends the confirmation response to the mobile terminal device 30. (S807).

FIG. 11(b) is a diagram showing the packet configuration of an acknowledgment.

As with acknowledgment requests, acknowledgments are sent by IP packets. The IP header, TCP header, and TLS header are the same as the confirmation request in FIG. 11(a). In the acknowledgment, the type of notification is set to acknowledgment in the data portion following the TLS header, and the result field contains information indicating either step S805 or S806 in FIG. 10B.

Returning to FIG. 10A, when the control unit 303 of the mobile terminal device 30 receives an acknowledgment from the kitchen remote controller 13 (S704: YES), it determines whether the result field of the acknowledgment matches or does not match. (S705). Here, if the confirmation fields match (S705: YES), the control unit 303 sets the operation mode to the in-home mode (S706), and receives remote operation from the operator. On the other hand, if the confirmation fields do not match (S705: NO), the control unit 303 sets the operation mode to the out-of-home mode (S707), and receives remote operation from the operator. Acceptance of remote operation is performed by the same processing as steps S304 to S306 in FIG. 4(a). At this time, the server 50 executes the processing shown in steps S406 and S407 in FIG.

<Effect of Embodiment 2>
According to the second embodiment, the following effects can be obtained.

The control unit 303 of the mobile terminal device 30 acquires the IP address of the kitchen remote controller 13, and based on the communication result (whether or not there is a confirmation response) when communicating (transmitting a confirmation request) to the acquired IP address, , determines whether the mobile terminal device 30 is located inside the home H10 or outside the home. Specifically, the control unit 303 determines that the mobile terminal device 30 is outside the home when there is no response from the kitchen remote controller 13 in the communication (transmission of the confirmation request) based on the IP address. This makes it possible to more appropriately determine whether the mobile terminal device 30 is inside or outside the home.

For example, in the determination method of the first embodiment, two routers 20 and 21 are installed in the home H10 as shown in FIG. When the connection setting is made, even if the mobile terminal device 30 exists in the home, the BSSID transmitted from the router 21 to which the mobile terminal device 30 is connected to the server 50 is the same as the BSSID of the router 20 to which the kitchen remote control 13 is connected. BSSID will not match. Therefore, in this case, the operation mode (in-home mode/out-of-home mode) is set assuming that the mobile terminal device 30 is outside the home even though the mobile terminal device 30 is inside the home.

On the other hand, in the second embodiment, as shown in steps S703 and S704 of FIG. It is determined whether Therefore, even if two routers are installed in the home H10 and the portable terminal device 30 is set to connect to the router 21 different from the router 20 to which the kitchen remote controller 13 is connected, as described above. , it can be properly determined whether the mobile terminal device 30 is inside or outside the home. Therefore, in the second embodiment, the in-home mode and the out-of-home mode can be set more appropriately in remote operation.

In the second embodiment, even if three or more routers are installed in the home H10, the router to which the mobile terminal device 30 connects grasps the IP address of the kitchen remote controller 13 connected to another router. As long as it is, it can be properly determined whether the mobile terminal device 30 is inside or outside the home. Further, in the second embodiment, even if the device to which the mobile terminal device 30 is connected in the home H10 is not a router but a repeater, it is possible to determine whether the mobile terminal device 30 exists inside or outside the home, as described above. can be properly determined.

Further, according to the second embodiment, the control unit 303 of the mobile terminal device 30 transmits information including the identification number (IoT_ID) of the kitchen remote controller 13 in the communication (confirmation request) based on the IP address, If the number (IoT_ID) and the identification number (IoT_ID) preset in the kitchen remote controller 13 do not match (S705 in FIG. 10A: NO), the operation mode is set to the remote mode (FIG. 10 S707), the target items in the remote operation are reduced. As a result, for example, it is possible to suppress unwanted setting operations due to spoofing.

In the second embodiment, as shown in FIG. 10A, when the identification number (IoT_ID) of the mobile terminal device 30 and the identification number (IoT_ID) preset in the kitchen remote controller 13 do not match, (S704: NO), the operation mode is set to the out-of-home mode (S707), but if these two identification numbers (IoT_ID) do not match, the number of setting items that can be remotely operated more than in the out-of-home mode may be decreased, or remote operation may be prohibited by setting all setting items to be inoperable. This makes it possible to more effectively suppress undesired setting operations due to spoofing.

<Modification of Embodiment 2>
In the second embodiment, the mobile terminal device 30 determines whether the mobile terminal device 30 is inside or outside the home. In this case, when the server 50 receives the acquisition request transmitted in step S701 of FIG. to the kitchen remote controller 13 . If the control unit 133 of the kitchen remote controller 13 receives the confirmation request from the mobile terminal device 30 within a predetermined time (for example, 5 seconds) after receiving this notification, it determines that the mobile terminal device 30 exists in the home H10, If the confirmation request is not received from the mobile terminal device 30 within a predetermined time, it is determined that the mobile terminal device 30 exists outside the home.

In this case, if the control unit 133 of the kitchen remote controller 13 receives the confirmation request within the predetermined time, it executes the processing of steps S802 to S807 in FIG. A response is sent to the mobile terminal device 30 via the router 20 . At this time, control unit 133 includes information (hereinafter referred to as “in-home identification information”) indicating that mobile terminal device 30 is in home H10 in this confirmation response.

In addition, if the control unit 133 of the kitchen remote controller 13 does not receive the confirmation request within the predetermined time, only the information indicating that the mobile terminal device 30 is outside the home (hereinafter referred to as "out-of-home identification information"). A confirmation response is generated that contains the information, and the generated confirmation response is transmitted to the mobile terminal device 30 via the server 50 .

In this case, the control unit 303 of the mobile terminal device 30 executes the following process instead of the process of steps S704 to S707 in FIG. 10(a). That is, upon receiving an acknowledgment from the kitchen remote controller 13 via the router 20, the control unit 303 confirms that the acknowledgment includes the indoor identification information, and determines whether the information in the result field matches or does not match. Check if there is Here, if the result fields match, the control unit 303 sets the operation mode to the in-home mode, and if the result fields do not match, sets the operation mode to the out-of-home mode. Further, upon receiving an acknowledgment from the kitchen remote controller 13 via the server 50, the control unit 303 confirms that the acknowledgment includes the out-of-home identification information, and sets the operation mode to the out-of-home mode.

Even with this control, as in the second embodiment, a plurality of routers are installed in the home H10, and the portable terminal device 30 is set to be connected to a router 21 different from the router 20 to which the kitchen remote controller 13 is connected. Even if there is, it can be properly determined whether the mobile terminal device 30 exists inside or outside the home. Therefore, the in-home mode and the out-of-home mode can be set more appropriately.

<Other modification examples>
In Embodiments 1 and 2 and their modifications, the wireless communication unit 136 is provided in the kitchen remote control 13 that constitutes the water heater 10 , but the wireless communication unit is provided in the water heater 11 and the water heater 11 is connected to the router 20 . may be connected. In this case, the control by the kitchen remote controller 13 in the first and second embodiments and their modifications is performed by the controller 111 of the water heater 11 . Alternatively, in addition to water heater 11 , bathroom remote controller 12 and kitchen remote controller 13 , a control unit having a wireless communication section may be arranged in water heater 10 and connected to router 20 . In this case, the control by the kitchen remote control 13 in the first and second embodiments and their modifications is performed by the control section of the control unit.

Also, hot water supply apparatus 10 (kitchen remote controller 13) does not necessarily have to be connected to router 20, and may be connected to a repeater installed in home H10, for example.

Further, when a relay device including a router 20, a communication adapter, and a control unit is installed in the home H10, the control unit of the relay device controls any of the first and second embodiments and modifications thereof. Control in the illustrated remote operation may be performed. In this configuration, router 20 and communication adapter are interposed between water heater 10 and external communication network 40 to relay water heater 10 and external communication network 40 . The communication adapter is, for example, wired to water heater 10 (for example, kitchen remote controller 13), and the communication adapter and router 20 are wirelessly connected.

For example, in this configuration, when the control unit of the relay device makes the determination based on the IP address of water heater 10 (kitchen remote control 13) shown in the second embodiment, server 50 acquires the IP address from portable terminal device 30. When the request is received, the notification to that effect is sent to the control unit of the relay device. In response to this, the control unit of the relay device monitors whether or not the hot water supply device 10 (kitchen remote controller 13) has responded to the confirmation request transmitted from the portable terminal device 30 within a predetermined time (for example, 5 seconds). do. Then, if this response is made from hot water supply device 10 (kitchen remote control 13) within a predetermined time, the control unit of the relay device determines that mobile terminal device 30 is in home H10, and this response is received within a predetermined time. If not from the device 10 (kitchen remote controller 13), it is determined that the portable terminal device 30 is outside the house.

In this case, the control unit of the relay device sets the remote operation mode to either the indoor mode or the outdoor mode based on whether the mobile terminal device 30 is inside the home or outside the home, and the setting result is is transmitted to the mobile terminal device 30 via the server 50 . In response to this, the mobile terminal device 30 sets the remote control mode to either the in-home mode or the out-of-home mode.

Also in this case, as in the second embodiment, the controller of the relay device may further determine whether the identification number (IoT_ID) included in the confirmation response is correct. In this case, even if the control unit of the relay device determines that the mobile terminal device 30 is in the home H10 due to the confirmation response, if the identification number (IoT_ID) is not appropriate, the remote operation mode set to out-of-home mode.

Also, the functions and items of hot water supply apparatus 10 are not necessarily limited to those shown in FIG. 5(b), and may be changed as appropriate. For example, the functions and items of hot water supply apparatus 10 may be hot water supply function and bath function and items associated with these functions, or hot water supply function, bath function and floor heating function and items associated with these functions. It can be an item.

Also, the operation screen 600 displayed on the mobile terminal device 30 may not necessarily have the configuration shown in FIG. Other operation screens may be used.

In the first embodiment, the identifier (BSSID) of the router 20 is transmitted from the router 20 to the server 50 at predetermined intervals, and the identifier (BSSID) managed by the server 50 is sequentially updated. 20 identifier (BSSID) may be registered, and then the identifier (BSSID) managed by the server 50 may be fixed to this identifier (BSSID) until the router 20 is replaced.

The control of the control unit described in the claims may be shared by water heater 10, mobile terminal device 30 and server 50, or one of water heater 10, mobile terminal device 30 and server 50 may you can go

For example, in the first embodiment and its modification 1, the control of the control unit described in claim 1 is mainly performed by the control unit 303 of the mobile terminal device 30 as shown in FIGS. It is executed jointly with the control unit 501 of the server 50, and in the modification 2 of the first embodiment, the control of the control unit described in claim 1 is mainly performed by the water heater 10 (kitchen remote controller) as shown in FIG. 13). Further, in the second embodiment, as shown in FIG. 10A, the control of the control unit described in claim 1 is mainly executed by the control unit 303 of the mobile terminal device 30, and the modification of the second embodiment is performed. 1, the control of the control unit described in claim 1 is mainly executed jointly by the control unit 133 of the kitchen remote controller 13 and the control unit 303 of the portable terminal device 30, as described above.

Thus, the control unit described in the claims may be configured by arbitrarily combining the control units of water heater 10, mobile terminal device 30, and server 50, or water heater 10, mobile It may be configured by the control unit of either the terminal device 30 or the server 50 .

In addition, the embodiments of the present invention can be appropriately modified in various ways within the scope of the claims.

1 hot water supply system 10 water heater 11 water heater 13 kitchen remote control 20, 21 router 30 portable terminal device 40 external communication network 50 server 133 control unit (hot water supply device control unit)
303 control unit (terminal device control unit)
501 control unit

Claims (8)

a water heater installed for a predetermined building;
a mobile terminal device having a function of remotely controlling the water heater via an external communication network outside the building;
It is determined whether the mobile terminal device is inside or outside the building, and if the mobile terminal device is located outside the building, the remote control target item is the mobile terminal device inside the building. a control unit that controls the remote operation so that there are fewer items than the target items of the remote operation when there is
The control unit acquires an IP address of the hot water supply apparatus, and determines whether the mobile terminal device is inside the building based on a communication result when the mobile terminal device communicates with the acquired IP address. and determine whether it exists in the outside,
A hot water supply system characterized by: In the hot water supply system according to claim 1,
The control unit acquires an identifier that is individually assigned to each router, and in the remote operation, the identifier of the router to which the water heater is connected matches the identifier of the router to which the mobile terminal device is connected. when determining that the mobile terminal device exists inside the building,
A hot water supply system characterized by: In the hot water supply system according to claim 2,
The router is a wireless router having a wireless communication function,
wherein the identifier is a BSSID individually assigned to the wireless router;
A hot water supply system characterized by: The hot water supply system according to any one of claims 1 to 3,
The control unit determines that the portable terminal device exists outside the building when the hot water supply device does not respond to the communication based on the IP address.
A hot water supply system characterized by: The hot water supply system according to any one of claims 1 to 4,
In the communication based on the IP address, the control unit causes the portable terminal device to transmit information including identification information of the water heater, and the transmitted identification information and identification information preset in the water heater. and decrease the target item in the remote operation when there is a mismatch,
A hot water supply system characterized by: In the hot water supply system according to any one of claims 1 to 5,
The IP address is an IP address set in a remote controller of the water heater,
A hot water supply system characterized by: The hot water supply system according to any one of claims 1 to 6,
A server connected to the external communication network and managing the remote control,
The server configures at least part of the control unit and executes at least part of the control in the control unit.
A hot water supply system characterized by: In the hot water supply system according to claim 7,
The server acquires an identifier that is individually assigned to each router, and when the identifier of the router to which the hot water heater is connected matches the identifier to which the mobile terminal device is connected in the remote operation, , determining that the mobile terminal device exists inside the building;
A hot water supply system characterized by:

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