JP2010203629A - Remote controller for water heater and water heater including the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a remote controller for a water heater, capable of easily starting two-way speech when a user shows a will of response with respect to a speech request from a remote controller for another water heater even if the user is busy. <P>SOLUTION: The remote controller 30A for the water heater enables two-way speech by an intercom function with respect to the remote controller 30B for the other water heater communicating with a water heater body 10. The remote controller 30A includes a speech control unit for making a speaker reproduce ringing tone when a speech request Rc is made from the remote control device for the other water heater and enabling the transmission of a sound signal by a communication circuit when sound exceeding a predetermined level is input to a microphone after start of the reproduction of the ringing tone so as to start the two-way speech. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a remote controller for a water heater and a water heater provided with the same, and more particularly to a remote controller for a water heater having an interphone function and a water heater provided with the same.

  Nowadays, a water heater having a plurality of remote controllers having an intercom function has been developed in consideration of an accident during bathing. In such a water heater, for example, as in the remote controller (bathing monitoring device) described in Patent Document 1, a call between remote controllers such as a remote controller installed in a bathroom and a remote controller installed in a kitchen is possible. Yes, when a call start operation is performed with one (calling source) remote controller, a two-way call with the other (calling destination) remote controller is automatically enabled. In addition, a device has been developed that enables a two-way call only when the remote controller of the call destination continues to ring and the call button is pressed on the remote controller.

JP-A-11-101502

  However, when a call start operation is performed on the caller remote controller, a two-way call can be automatically made with a conventional remote controller that allows a two-way call automatically. For this reason, inconveniences such as a user who has not been heard hear a story of a caller may occur. In addition, with a conventional remote controller in which the remote controller of the callee continues to ring until the call button is pressed on the remote controller of the callee, the user is aware of the ringing tone but is in the middle of housework. Convenience when cannot be separated.

  The present invention has been made in view of the above circumstances, and it is a situation in which a hand cannot be lifted if the user of the call request destination shows a willingness to respond to a call request from another remote controller for a water heater. Another object of the present invention is to provide a remote controller for a water heater that can easily start a two-way call, and a water heater using the same.

  The remote controller for a water heater of the present invention can communicate with a water heater main body that boils hot water and supplies it to a predetermined hot water supply destination, and has an interphone function with another remote controller for water heaters that communicates with the water heater main body. Is a remote controller for a water heater capable of two-way communication with each other, and transmits a voice signal corresponding to the electrical signal created by the microphone unit that converts voice into an electrical signal to another remote controller for the hot water heater Together with a communication circuit unit for receiving a voice signal transmitted from another remote controller for hot water heater, and a speaker unit for reproducing a voice corresponding to the voice signal received by the communication circuit unit from another remote controller for hot water heater, When there is a call request from another remote controller for water heater The speaker unit starts a call operation by playing it, and when a sound of a predetermined level or more is input to the microphone unit during the call operation, the communication circuit unit can transmit a voice signal to make a two-way call A call control unit for starting the communication.

  In the remote controller for a hot water heater of the present invention, when a user who notices a ringing tone notifying a call request from another remote controller for a hot water heater makes a louder sound than a certain level, the remote controller for the other hot water heater is bidirectional. A call becomes possible. If the voice is smaller than the above, two-way communication is not possible. Therefore, if the user of the call request destination responds to a call request from another remote controller for the hot water heater by indicating the will of the above-mentioned voice, it is easy even in a situation where the hands cannot be released. A two-way call can be started.

FIG. 1 is a schematic diagram illustrating an example of a water heater according to the present invention. FIG. 2 is a front view schematically showing an appearance of a remote controller for a hot water heater installed in a bathroom with the hot water heater shown in FIG. 1. FIG. 3 is a front view schematically showing an appearance of a remote controller for a hot water heater installed in a kitchen with the hot water heater shown in FIG. 1. FIG. 4 is a functional block diagram schematically showing a remote controller for a water heater installed in a bathroom with the water heater shown in FIG. FIG. 5 is a sequence diagram illustrating an example of processing performed by each of the water heater remote controllers in the water heater illustrated in FIG. 1 before starting a two-way call.

  Hereinafter, embodiments of a remote controller for a water heater and a water heater according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited to the following embodiment.

  FIG. 1 is a schematic diagram illustrating an example of a water heater according to the present invention. A water heater 50 shown in the figure includes a water heater body 10 that boils water into hot water and supplies it to a predetermined hot water supply destination, and two water heater remote controllers 30A and 30B having an interphone function.

  The water heater main body 10 stores the water supplied from the water supply pipe 1 and also stores the hot water boiled by a heat source machine (not shown), the stacked hot water storage tank 3, the hot water stored in the hot water storage tank 3 and the water supply pipe The main body side control device 7 communicates with the hot water supply pipes 5a and 5b for mixing water from the path 1 with a mixing valve and supplying the water to a predetermined hot water supply destination, and the remote controllers 30A and 30B for each hot water heater.

  As said heat source machine, the heater etc. which are arrange | positioned in a heat pump unit and a hot water storage tank, for example are used. The hot water supply line 5 a is connected to the bathtub 65 in the bathroom 70 and supplies the bath water 65 a to the bathtub 65. The hot water supply line 5 b is connected to a currant 75 provided in the sink 73 of the kitchen 80, and supplies hot water at a temperature set by the user to the currant 75.

  The main body side control device 7 controls the operation of the heat source unit and the mixing valve in accordance with the commands and information input from the remote controllers 30A and 30B for the hot water heater to boil the water into hot water and store it in the hot water storage tank 3 The hot water supply operation for controlling the operation and the hot water supply temperature to the hot water supply destination is performed. Further, the main body side control device 7 relays a request, permission, a voice signal carrier wave, and the like related to a two-way call between the hot water heater remote controllers 30A and 30B.

  On the other hand, each of the hot water heater remote controllers 30A and 30B is included in the remote controller for hot water heater of the present invention, and can make a two-way call with each other by the interphone function. The water heater remote controller 30A is installed in the bathroom 70 (hereinafter referred to as “bathroom remote controller 30A”), and is connected to the main body side control device 7 through the communication line 40a. The hot water heater remote controller 30B is installed in the kitchen 80 (hereinafter referred to as “kitchen remote control 30B”) and is connected to the main body side control device 7 through the communication line 40b.

  FIG. 2 is a front view schematically showing an appearance of a remote controller for a water heater (bathroom remote controller) installed in the bathroom with the water heater shown in FIG. As shown in the figure, the bathroom remote control 30A includes an operation unit 13, a display unit 15, a microphone unit 17 (hereinafter, the microphone is abbreviated as “microphone”), and a speaker unit 19.

  The operation unit 13 includes a plurality of input switches 13a to 13f for inputting commands and information relating to the boiling operation and the hot water supply operation from the bathroom remote controller 30A to the main body side control device 7 (see FIG. 1), and the kitchen remote controller 30B. And a call switch 13g for inputting a call request to (see FIG. 1).

  The display unit 15 is configured using, for example, a flat display panel such as a liquid crystal display panel, and visually displays commands and information input from the operation unit 13 by a user using characters, figures, characters, and the like. Also, information such as operating conditions in the water heater main body 10 (see FIG. 1) received from the main body side control device 7, for example, boiling temperature, hot water temperature in the bathtub 65 (see FIG. 1), hot water in the bathtub 65 The amount of hot water and the temperature of hot water supplied to the currant 75 (see FIG. 1) are visually displayed as characters, figures, characters, and the like.

  The microphone unit 17 converts the voice (input) made by the user on the bathroom remote control 30A side into an electrical signal when talking to the user on the kitchen remote control 30B side. The speaker unit 19 reproduces sound according to an audio signal from the kitchen remote control 30B when talking with a user on the kitchen remote control 30B side. The speaker unit 19 reproduces a predetermined reception sound when a call request is input from the call switch 13g of the bathroom remote control 30A, and at the same time when a call request is received from the kitchen remote control 30B to the bathroom remote control 30A. Play sound intermittently.

  FIG. 3 is a front view schematically showing an appearance of a remote controller (kitchen remote controller) for a hot water heater installed in a kitchen with the hot water heater shown in FIG. 1. As shown in the figure, the kitchen remote control 30B has a slightly different appearance from the bathroom remote control 30A (see FIG. 2) described above, but, like the bathroom remote control 30A, the operation unit 13, the display unit 15, the microphone unit 17, and A speaker unit 19 is provided. Since the configuration and function of each of these units are the same as those of the operation unit 13, the display unit 15, the microphone unit 17, or the speaker unit 19 in the bathroom remote control 30A, description thereof is omitted here. However, the call switch 13g in the kitchen remote control 30B is a switch for inputting a call request with the bathroom remote control 30A.

  FIG. 4 is a functional block diagram schematically showing a hot water heater remote controller (bathroom remote controller) installed in the bathroom with the hot water heater shown in FIG. 1. As shown in the figure, the bathroom remote control 30A includes an audio input circuit unit 21, an audio output circuit unit 23, a communication circuit unit 25, in addition to the operation unit 13, the display unit 15, the microphone unit 17, and the speaker unit 19 described above. A remote control unit 27 and a storage unit 29 are provided.

  The voice input circuit unit 21 amplifies the electrical signal created by the microphone unit 17 and sends it to the remote control unit 27. The audio output circuit unit 23 creates an electrical signal corresponding to the audio signal demodulated by the remote control unit 27 based on the audio signal carrier wave received by the communication circuit unit 25, and sends the electrical signal to the speaker unit 19. Also, the voice output circuit unit 23 is an electric signal corresponding to a predetermined reception sound under the control of the remote control unit 27 when a call request is input from the call switch 13g (see FIG. 2) of the bathroom remote control 30A. Is sent to the speaker unit 19. Further, when a call is requested from the kitchen remote controller 30B to the bathroom remote controller 30A, an electrical signal corresponding to a predetermined ringing tone is generated and intermittently sent to the speaker unit 19 under the control of the remote control unit 27. .

  The speaker unit 19 reproduces a predetermined reception sound when receiving an electrical signal corresponding to the reception sound from the audio output circuit unit 23, and receives a predetermined ringing sound when receiving an electrical signal corresponding to the ringing sound. Play.

  The communication circuit unit 25 receives and distributes information such as instructions related to the transmission of commands and information from the bathroom remote controller 30A to the main body side control device 7 (see FIG. 1), and the driving situation sent from the main body side control device 7. The process which concerns on is performed. Also, processing related to a call request and transmission of an audio signal carrier from the bathroom remote control 30A to the kitchen remote control 30B, and processing related to reception and distribution of a call permission and audio carrier sent from the kitchen remote control 30B to the bathroom remote control 30A are performed. .

  The remote-side control unit 27 includes an input processing unit 27a, a display control unit 27b, and a call control unit 27c, and the display unit 15 and the communication circuit according to the input content from the operation unit 13 and the reception content of the communication circuit unit 25. The operation of the unit 25 is controlled.

  The input processing unit 27a distributes commands and information related to the operation of the display unit 15 among the commands and information input from the operation unit 13 to the display control unit 27b. The call is distributed to the call control unit 27c. Further, information such as the driving situation sent from the main body side control device 7 is distributed to the display control unit 27b. Further, information input from the operation unit 13 and information transmitted from the main body side control device 7 are stored in the storage unit 29.

  The display control unit 27b to which commands and information are distributed from the input processing unit 27a causes the display unit 15 to perform visual display of characters, figures, characters, and the like corresponding to these commands and information, or ends the visual display. Or The display control unit 27b causes the display unit 15 to visually display characters, figures, characters, etc. corresponding to this information even when the input processing unit 27a distributes the information received from the main body side control device 7. Or end the visual display.

  When a call request is input from the call switch 13g (see FIG. 2) of the bathroom remote control 30A, the call control unit 27c controls the operation of the communication circuit unit 25 and calls the communication circuit unit 25 to the kitchen remote control 30B. While transmitting a request, the speaker unit 19 reproduces a reception sound for a call request by causing the speaker unit 19 to output a predetermined electrical signal from the voice output circuit unit 23.

  The call control unit 27c outputs a predetermined electrical signal from the audio output circuit unit 23 to the speaker unit 19 when the communication circuit unit 25 receives the call request from the kitchen remote control 30B and distributes the call request. The speaker unit 19 is caused to start a call operation by causing the speaker unit 19 to reproduce a predetermined ringing tone intermittently. The call control unit 27c to which the call request from the kitchen remote control 30B is assigned monitors the output of the voice input circuit unit 21, and when the output exceeds the condition value, in other words, a predetermined sound pressure When a sound exceeding the level is input to the microphone unit 17, it is determined that the user on the bathroom remote control 30A side is willing to respond, and the communication permission to the kitchen remote control 30B is transmitted to the communication circuit unit 25.

  Then, the call control unit 27c transmits a call permission addressed to the kitchen remote control 30B to the communication circuit unit 25, and then transmits a voice signal to the communication circuit unit 25 based on the electric signal amplified by the voice input circuit unit 21, specifically, Generates an audio signal carrier wave and transmits it to the kitchen remote controller 30B, and the communication circuit unit 25 demodulates the audio signal carrier wave received from the kitchen remote controller 30B to create an audio signal. The audio signal is output to the audio output circuit unit 23. To cause the speaker unit 19 to reproduce the sound. As a result, a two-way call is started between the bathroom remote controller 30A and the kitchen remote controller 30B.

  Similarly, when the communication circuit unit 25 receives a call permission from the kitchen remote control 30B and distributes the call permission, the call control unit 27c demodulates the audio signal carrier received by the communication circuit unit 25 from the kitchen remote control 30B. Then, the audio signal is generated, and the audio signal is sent to the audio output circuit unit 23 to cause the speaker unit 19 to reproduce the audio, and the audio signal is sent to the communication circuit unit 25 based on the electric signal amplified by the audio input circuit unit 21. Specifically, an audio signal carrier wave is generated and transmitted to the kitchen remote controller 30B. As a result, a two-way call is started between the bathroom remote controller 30A and the kitchen remote controller 30B.

  The kitchen remote controller 30B (see FIG. 1 or 3) can also be represented by the same functional block diagram as the bathroom remote controller 30A shown in FIG.

  The water heater 50 having the bathroom remote control 30A and the kitchen remote control 30B described above has a feature in processing until a bidirectional call is started between the bathroom remote control 30A and the kitchen remote control 30B by the interphone function. Hereinafter, the processing performed by the bathroom remote controller 30A and the kitchen remote controller 30B until the two-way call is started will be specifically described with reference to FIG. 5 with appropriate reference numerals used in FIGS.

  FIG. 5 is a sequence diagram illustrating an example of processing performed by each of the water heater remote controllers (a bathroom remote controller and a kitchen remote controller) in the water heater illustrated in FIG. 1 before starting a two-way call. In the illustrated example, a user on the bathroom remote control 30A side requests the user on the kitchen remote control 30B side to start a two-way call. The bathroom remote control 30A performs steps S1 to S4, and the kitchen remote control 30B Steps S11 to S16 are performed.

  In step S1 performed first by the bathroom remote controller 30A, the call controller 27c (see FIG. 4) determines whether or not a call request is input from the call switch 13g (see FIG. 2) of the bathroom remote controller 30A. If it is determined in step S1 that no call request is input, step S1 is repeated. If it is determined that a call request is input, the process proceeds to step S2.

  In step S2, the call control unit 27c of the bathroom remote control 30A causes the speaker unit 19 to reproduce a reception request sound of the call request by causing the speaker unit 19 to output a predetermined electrical signal from the audio output circuit unit 23, and the bathroom remote control 30A. The call control unit 27c controls the operation of the communication circuit unit 25 to transmit a call request Rc to the kitchen remote control 30B. This call request Rc propagates through the communication line 40a (see FIG. 1) and is sent to the main body side control device 7 of the water heater main body 10. From here, it propagates through the communication line 40b (see FIG. 1) to the kitchen remote control 30B. Sent.

  In the next step S3, the call control unit 27c of the bathroom remote control 30A determines whether or not the call permission Ac is received from the kitchen remote control 30B. When it is determined in step S3 that the call permission Ac has not been received yet, step S3 is repeated, and when it is determined that the call permission Ac has been received, the process proceeds to step S4, where the call control unit 27c causes the kitchen remote control 30B to To start a two-way call. The call control unit 27c causes the communication circuit unit 25 to create an audio signal carrier that includes an audio signal corresponding to the electrical signal created by the microphone unit 17 (see FIG. 4) of the bathroom remote controller 30A. Send to 30B. In addition, an audio signal is extracted from the audio signal carrier wave received by the communication circuit unit 25 from the kitchen remote control 30B and sent to the audio output circuit unit 23 (see FIG. 4), and the speaker unit 19 reproduces the audio. In FIG. 5, the start of a two-way call is indicated as “intercom opening”.

  On the other hand, in step S11 performed first by the kitchen remote controller 30B, the call control unit of the kitchen remote controller 30B determines whether or not there is a call request Rc from the bathroom remote controller 30A. If it is determined in step S11 that there is no call request yet, step S11 is repeated, and if it is determined that there is a call request Rc, the process proceeds to steps S12 to S16.

  In step S12, the call control unit of the kitchen remote control 30B causes the speaker unit 19 (see FIG. 3) to output a predetermined electrical signal from the audio output circuit unit, thereby generating a ringing sound for notifying that there is a call request Rc. 19 is played back for a certain period of time. In step S13, the call control unit of the kitchen remote control 30B controls the operation of the voice output circuit unit to stop the reproduction of the ringing tone on the speaker unit 19 for a certain period of time. The ringing tone reproduction time and stop time are determined by, for example, the manufacturer of the water heater 50, and the data is stored in advance in the storage unit of the kitchen remote control 30B.

  In step S14, it is determined whether or not the sound pressure level of the sound (sound picked up by the microphone unit 17) input to the microphone unit 17 (see FIG. 3) exceeds the condition value while the ringing tone is stopped. The call control unit of the kitchen remote control 30B determines. If it is determined in step S14 that the sound pressure level does not exceed the condition value, the process returns to step S12 to repeat step S12 and subsequent steps. As a result, until the sound having a sound pressure level equal to or higher than the above condition value is input to the microphone unit 17, the calling operation by the speaker unit 19, that is, the repeated operation of playing and stopping the calling sound is continued.

  Note that the above condition value is a criterion for determining whether or not the user on the kitchen remote control 30B side is willing to respond to a call request from the bathroom remote control 30A. In the kitchen 80 (see FIG. 1). Are determined by the manufacturer of the water heater 50 so that they can be distinguished from the chats and environmental sounds in the kitchen 80, and the data is stored in advance in the storage unit of the kitchen remote controller 30B.

  When it is determined in step S14 that the sound pressure level has exceeded the condition value, the process proceeds to step S15, where the call control unit of the kitchen remote control 30B controls the operation of the voice output circuit unit to end the calling operation by the speaker unit 19. At the same time, the call control unit of the kitchen remote control 30B controls the operation of the communication circuit unit to transmit the call permission Ac to the bathroom remote control 30A. This call permission Ac propagates through the communication line 40b and is sent to the main body side control device 7 of the water heater main body 10. From here, it propagates through the communication line 40a and is sent to the bathroom remote controller 30A.

  Then, it progresses to step S16 and the telephone call control part of the kitchen remote control 30B starts the two-way call with the bathroom remote control 30A. The call control unit of the kitchen remote control 30B causes the communication circuit unit to generate an audio signal carrier including an audio signal corresponding to the electrical signal generated by the microphone unit 17 (see FIG. 3) of the kitchen remote control 30B. Is transmitted to the bathroom remote controller 30A. In addition, an audio signal is extracted from the audio signal carrier wave received by the communication circuit unit from the bathroom remote controller 30A and sent to the audio output circuit unit to cause the speaker unit 19 to reproduce the audio.

  When the user on the kitchen remote control 30B side requests the user on the bathroom remote control 30A side to start a two-way call, the same processing as that shown in FIG. 5 is performed in each of the bathroom remote control 30A and the kitchen remote control 30B. . However, in this case, the kitchen remote control 30B performs steps S1 to S4 shown in FIG. 5, and the bathroom remote control 30A performs steps S11 to S16.

  In the water heater 50 (see FIG. 1) that enables two-way communication between the bathroom remote control 30A and the kitchen remote control 30B as described above, the kitchen remote control 30B side that has noticed the ringing tone that notifies the call request Rc from the bathroom remote control 30A. When the user utters a voice of a certain level or larger, a two-way call between the bathroom remote controller 30A and the kitchen remote controller 30B becomes possible. Similarly, when a user on the bathroom remote control 30A side who has noticed a ringing tone informing a call request from the kitchen remote control 30B utters a voice of a certain level or larger, bidirectional communication between the kitchen remote control 30B and the bathroom remote control 30A. A call becomes possible.

  In other words, if the user of the call request destination responds to a call request from another remote controller for a hot water heater by indicating the will of the above-mentioned loudness, even if it is during housework or during shampooing, etc. It is possible to easily start a two-way call even in a situation where the hands cannot be released. Since a two-way call is not started unless a voice with a sound pressure level equal to or higher than the above condition value is generated, it is difficult to cause inconveniences such as a user who is not asked to hear a talk. Therefore, the two-way call function between the bathroom remote controller 30A and the kitchen remote controller 30B is very convenient and highly convenient.

  As mentioned above, although the remote controller for water heaters and the water heater of the present invention have been described with reference to the embodiment, the present invention is not limited to the above-described embodiment as described above. For example, the remote controller for a water heater according to the present invention is configured such that both a communication function with the water heater body and a sound of a predetermined level or more are input to the microphone unit after starting the reproduction of a ringing tone for notifying a call request. Basically, it is sufficient if it has a function for starting a two-way call, and its configuration can be changed as appropriate.

  For example, the ringing tone to be played when the remote controller for the hot water heater of the present invention receives a call request from another remote controller for the hot water heater can be appropriately selected from an electronic sound, a melody, a voice message, and the like. In addition, the remote controller for a hot water heater of the present invention extracts a human voice from the sound input to the microphone unit by frequency separation, and makes a two-way call when the sound pressure level of the voice is greater than a predetermined level. It can also be configured to start, and in this case, when a call request is made from another remote controller for a water heater, the above ringing tone may be played continuously instead of intermittently. Good.

  The hot water heater described in the embodiment is such that a two-way call is possible after the remote controller for the hot water heater that has received the call request transmits the call permission to the remote controller for the hot water heater of the call source. Can be omitted. For example, when a sound of a predetermined level or more is input to the microphone unit of the remote controller for hot water heater during the calling operation, the call control unit of the remote controller for hot water heater receives an audio signal from the communication circuit unit When the remote controller for the hot water heater of the caller receives the audio signal (specifically, the audio signal carrier wave), the call control unit enables the communication circuit unit to transmit the audio signal, and the two-way call Can also be configured to start.

  In the hot water heater described in the embodiment, the main body side control device relays the two-way call between the hot water heater remote controllers. However, the hot water heater is connected so that the remote controller for the hot water heater directly transmits and receives the audio signal carrier wave. It may be configured. Regardless of whether or not the controller on the main body side relays a two-way call between remote controllers for water heaters, each remote controller for water heaters is provided with a call release switch for canceling the call request, and the call release switch is operated. Thus, a call release request for canceling the call request may be transmitted to the call destination. In this case, the calling operation at the remote controller for the hot water heater at the call destination ends when the call release request is received. The two-way call between the water heater remote controllers is performed by, for example, receiving a call release request from one of the water heater remote controllers or sending a call release request from one of the water heater remote controllers to the other of the water heater remote controllers. The process ends when the controller receives it.

  The hot water heater of the present invention is basically sufficient as long as it has two or more remote controllers for the hot water heater of the present invention, and the configuration other than the remote controller for the hot water heater, for example, the configuration related to boiling water, hot water supply, etc. Can be selected. For example, a circulation line for returning hot water stored in a hot water storage tank to the hot water storage tank via a reheating heat exchanger, and a circulation line for returning bath water in the bathtub to the bathtub via a reheating heat exchanger, It is also possible to add a function of reheating the bath water by reheating the bath water with a reheating heat exchanger using the hot water stored in the hot water storage tank as a heat source. The present invention can be variously modified, modified and combined in addition to the above.

  The water heater remote controller and water heater of the present invention can be suitably used as a home or business water heater remote controller and water heater.

7 Main body side control device 10 Water heater main body 13 Operation unit 13g Call switch 15 Display unit 17 Microphone unit 19 Speaker unit 25 Communication circuit unit 27 Remote side control unit 27c Call control unit 30A Remote controller for water heater (bathroom remote controller)
30B Water heater remote controller (kitchen remote control)
50 Water heater 70 Bathroom 80 Kitchen

Claims (4)

Hot water supply that can communicate with a hot water supply body that boils hot water and supplies it to a predetermined hot water supply destination, and that can communicate with each other by an interphone function with another remote controller for the hot water supply that communicates with the hot water supply body A dexterous remote controller,
A microphone unit that converts sound into an electrical signal;
A communication circuit unit for transmitting an audio signal corresponding to the electrical signal created by the microphone unit to the other remote controller for hot water heater and receiving an audio signal transmitted from the remote controller for other hot water heater; ,
A speaker unit that reproduces audio corresponding to the audio signal received by the communication circuit unit from the other remote controller for hot water heater;
When there is a call request from the other remote controller for the hot water heater, the speaker unit is caused to play a ringing sound by causing the speaker unit to reproduce a ringing sound. A call control unit that, when input to the microphone unit, enables the transmission of the audio signal by the communication circuit unit and starts the two-way call;
A remote controller for a water heater, comprising: The call control unit
When there is a call request from the other remote controller for the hot water heater, the speaker unit starts a calling operation by intermittently playing a ringing tone,
Determining whether or not the volume of the sound input to the microphone unit is greater than or equal to a predetermined volume when the ringing tone that is intermittently played is in a silent state;
The remote controller for a hot water heater according to claim 1.   After the call control unit starts the call operation, until a sound of a predetermined level or more is input to the microphone unit, or until there is a call release notification from the other remote controller for water heater, The remote controller for a hot water heater according to claim 1 or 2, wherein the calling operation is continued by the speaker unit. A water heater provided with a water heater body that boils hot water and supplies the hot water to a predetermined hot water supply destination, and a plurality of remote controllers that communicate with the water heater body and can communicate with each other by an interphone function,
Each of the plurality of remote controllers is the hot water heater remote controller according to any one of claims 1 to 3.

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