JP6163910B2 - Remote control device with intercom function - Google Patents

Description

  The present invention relates to a remote control device with an interphone function that enables communication between at least two remote control devices among a plurality of remote control devices for remotely controlling an operated device (remote control target).

  Conventionally, as a plurality of remote controllers used in a bath device with a water heater, one having an interphone function that enables a telephone call between the plurality of remote controllers as well as a remote operation function for a bath device with a water heater is known. (For example, refer to Patent Document 1). In addition, as a communication method between two remote controllers with intercom function, it is possible to send a voice from one remote controller to the other remote controller only during the period of pressing and holding the call switch of one remote controller, A press talk system is known in which the other remote controller is in a receiving state during the period (see, for example, Patent Document 2).

JP 2006-174360 A JP-A-9-233565

  By the way, in order to realize an intercom function between the kitchen remote controller and the bathroom remote controller described in Patent Document 1, each of the remote controllers is provided with a transmitter (transmitter) and a receiver (receiver). When the remote control enters a state in which a call can be made, power is supplied to the transmitter and the receiver so that the remote controller can operate.

  However, for example, when a call is made from the kitchen remote controller to the bathroom remote controller, the kitchen remote controller's transmitter (transmitter) and the bathroom remote controller's receiver (receiver) operate, while the kitchen remote controller's receiver (receiver). ) And the transmitter (speaker) of the bathroom remote control are inactive. In this case, since it is not necessary to perform simultaneous two-way communication like a telephone, it is considered unnecessary to supply power to the receiving unit (receiving unit) of the kitchen remote control and the transmitting unit (sending unit) of the bathroom remote control. .

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a remote control device with an intercom function capable of reducing current consumption and improving power saving performance. is there.

To achieve the above object, according to the first aspect of the present invention, an interphone function comprising a remote operation function capable of remotely operating a device to be operated and an interphone function enabling a call between at least two remote operation devices. The following specific items will be provided for remote control devices. That is, a control unit that controls the operation of the intercom function, a transmitting unit that modulates an audio signal based on audio into an audio carrier, and a receiver that demodulates the received audio carrier into an audio signal and outputs the audio , A call operation unit for determining which one of the two remote control devices is capable of transmitting and the other is capable of receiving, and supply of drive power to the transmitter and receiver A power supply switching control unit for individually switching off and switching and an audio signal detection unit for detecting the audio signal are provided. Then, as the control unit, when the current call state is sending state is by the power supply switching control unit, blocking switching to Rutotomoni the supply of driving power to said receiver portion, the current call state feed Even in a state where speech is possible, when a voice signal in the transmitter is not detected, the power supply switching controller is configured to cut off and switch the supply of drive power to at least some components of the transmitter. (Claim 1).

  In the case of the present invention, for example, if one of the two intercom function-equipped remote control devices becomes ready for transmission by operation of the call operation unit, the power supply to the reception unit that is not used in the transmission operation is switched off. become. As a result, it is possible to reduce the current consumption corresponding to the switching switching, and the power saving can be improved.

In addition, as a control unit, even if the current call state is a state where transmission is possible, if the audio signal in the transmission unit is not detected, the power supply switching control unit causes at least one of the transmission units. Since the configuration is such that the supply of drive power to the components is cut off and switched, even if the transmission is possible, the voice signal is not detected and is not actually used. It becomes possible to cut off the power supply to the component parts (for example, a microphone amplifier or the like). As a result, current consumption can be further reduced, and further power saving can be improved.

In the second invention, a remote control device with an intercom function having a remote control function capable of remotely controlling a device to be operated and an interphone function capable of making a call between at least two remote control devices. The following specific matters were prepared. That is, a control unit that controls the operation of the intercom function, a transmitting unit that modulates an audio signal based on audio into an audio carrier, and a receiver that demodulates the received audio carrier into an audio signal and outputs the audio , A call operation unit for determining which one of the two remote control devices is capable of transmitting and the other is capable of receiving, and supply of drive power to the transmitter and receiver A power supply switching control unit for individually switching off and switching and an audio signal detection unit for detecting the audio signal are provided. Then, as the control unit, when the current call state is receiving possible state, by the power supply switching control unit, blocking switching to Rutotomoni the supply of driving power to the transmission section, the current call state receiving even state, the audio signal in the reception section is in the case of non-detection by the power supply switching control unit, and a configuration for blocking switching the supply of the drive power to at least some components of the receiver portion (Claim 2 ).

  In the case of the present invention, for example, one of the two remote control devices with an intercom function is ready to send a voice by the operation of the call operation unit, and even if the other is ready to receive a voice, the voice reception is possible. Also in the remote control device with an interphone function, the power supply to the transmitter that is not used in the receiving operation is switched off. As a result, it is possible to reduce the current consumption corresponding to the switching switching, and the power saving can be improved.

In addition, as a control unit, even when the current call state is a receivable state, when a voice signal in the receiving unit is not detected, at least a part of the receiving unit is configured by the power supply switching control unit. Since it is configured to cut off and switch the drive power supply to the receiver, some components of the receiver (for example, a speaker amplifier) are in a time zone in which the voice signal is not detected and is actually unused even in a state where reception is possible Etc.) can be cut off. As a result, current consumption can be further reduced, and further power saving can be improved.

  As described above, according to the remote control device with an intercom function according to claim 1, for example, if one of the two remote control devices with an intercom function becomes ready to send a voice by operating the call operation unit, The power supply can be stopped by switching off the power supply to the receiver that is not used in the transmission operation. As a result, it is possible to reduce the current consumption corresponding to the switching and to improve the power saving performance.

In addition, as a control unit, even if the current call state is a state where transmission is possible, if the audio signal in the transmission unit is not detected, the power supply switching control unit causes at least one of the transmission units. Since it is configured to cut off and switch the drive power supply to the component parts, even if it is in a state where transmission is possible, a partial configuration of the transmission unit in a time zone when the audio signal is not detected and actually unused The power supply to the element can be cut off. As a result, the current consumption can be further reduced, and further power saving can be improved.

According to the remote control device with an intercom function according to claim 2 , for example, one of the two remote control devices with an intercom function is enabled to transmit a voice by operating the call operation unit, and the other is enabled to receive a voice. However, even in the remote control device with an intercom function that is ready to receive a call, the power supply to the transmitter that is not used in the receiving operation can be switched off to stop the power supply. As a result, it is possible to reduce the current consumption corresponding to the switching and to improve the power saving performance.

In addition, as a control unit, even when the current call state is a receivable state, when a voice signal in the receiving unit is not detected, at least a part of the receiving unit is configured by the power supply switching control unit. because you are configured to block switching the supply of the drive power to the actually power supply to some components of the receiver section in a time zone which is not used in speech signal even in the receiving state is not detected It can be blocked. As a result, the current consumption can be further reduced, and further power saving can be improved.

It is a schematic view of a hot-water supply system according to the reference embodiment or implementation of the invention. It is a schematic block block diagram which connected the remote control apparatus with the intercom function which concerns on a reference form mutually. It is a schematic block diagram connected to each other interphone function with remote control device according to the implementation embodiments.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1, two of the remote control according to the reference form or implementation form of intercom functions with the remote operation apparatus of the present invention (e.g., a kitchen remote controller 2 or 2a, and the bathroom remote controller 3 or 3a) schematic diagram of a hot water supply system with a It is. This hot water supply system includes a water heater 4 as an operated device (remote operation target), a kitchen remote control 2 or 2a as a remote operation device with an interphone function, and a bathroom remote control 3 or 3a. The water heater 4, the kitchen remote controller 2 or 2a, and the bathroom remote controller 3 or 3a are connected to each other by a connection line 5 configured using a two-core communication cable. In addition, the remote control as another remote control device with an intercom function can be similarly connected to the water heater 4, the kitchen remote control 2 or 2a, and the bathroom remote control 3 or 3a by the connection line 5. Also, the combination of kitchen remote controller 2 and bathroom remote controller 3 is a reference embodiment, the combination of kitchen remote controller 2a and bathroom remote controller 3a is a implementation form, respectively.

  As the water heater 4, FIG. 1 illustrates, for example, one configured as a composite heat source machine having a hot water filling function and a reheating function in addition to the hot water supply function. In the case of this example, the water heater 4 is configured so that the bath heat exchanger 41 and the hot water heat exchanger 42 are disposed in one can and heat-exchanged by a combustion burner 43 that is a common heat source. ing. And the hot water heater 4 receives the water supply such as tap water in the water supply passage, and in the hot water supply heat exchanger 42, the hot water heated to the predetermined temperature by heat exchange heating with the combustion heat of the combustion burner 43 is discharged to the hot water supply passage. The hot water supply pipe 44 supplies hot water to a hot water tap 45 (only one is shown in FIG. 1 representatively) in various places such as a kitchen and a washroom, or a recirculation circulation pipe composed of a return path 46 and an outgoing path 47. 48 can be used to fill the bathtub 6 with hot water. Further, in order to realize the reheating function, the hot water heater 4 circulates the hot water in the bathtub 6 between the bath heat exchanger 41 through the recirculation circulation pipe 48 by the operation of a circulation pump (not shown). Thus, it can be heated up to a predetermined temperature.

  Each of the above hot water supply, reheating and hot water filling operations is realized by operation control by the water heater controller 7 based on operation signals transmitted from the kitchen remote controller 2, 2a and / or the bathroom remote controller 3, 3a. It has become. The operation signal is an operation signal carrier mainly composed of operation command information such as an operation start command or an operation stop command, and an operation command signal related to setting information such as a set hot water temperature or a set reheating temperature. As a result, the operation of the water heater 4 can be remotely controlled by the kitchen remote controller 2, 2a and / or the bathroom remote controller 3, 3a. The kitchen remote controllers 2 and 2a are installed in the kitchen, and the bathroom remote controllers 3 and 3a are installed in the bathroom. The kitchen remote controllers 2 and 2a and the bathroom remote controllers 3 and 3a have a remote operation function for the water heater 4. In addition, an interphone function is provided for making a call between the kitchen remote controller 2 or 2a and the bathroom remote controller 3 or 3a. In order to realize this intercom function, the audio signal carrier wave and the driving signal carrier wave are superimposed and carried by the connection line 5. Note that power is supplied from the water heater controller 7 to the kitchen remote controllers 2 and 2a and the bathroom remote controllers 3 and 3a via the connection line 5.

< Reference form>
As shown in FIG. 2, the kitchen remote controller 2 includes a microcomputer 21 as a control unit, a communication circuit 22, a transmitter 23, a power supply circuit 24 for the transmitter 23, a receiver 25, and a power supply for the receiver. A circuit 26 and an operation unit 27 including a call switch 271 are provided. Similarly, the bathroom remote controller 3 includes a microcomputer 31 as a control unit, a communication circuit 32, a transmitter unit 33, a power circuit 34 for the transmitter unit 33, a receiver unit 35, and a power circuit 36 for the receiver unit, And an operation unit 37 including a call switch 371 as a call operation unit.

  The communication circuits 22 and 32 transmit the operation signal output from the microcomputers 21 and 31 to the water heater controller 7 or activate the intercom function based on the operation of the call switches 271 and 371 by the user so that the communication is possible. A call request signal for switching is sent to another remote controller 3 or 2, or a signal such as display information received from the water heater controller 7 is output to the microcomputers 21 and 31. The transmitters 23 and 33 include microphones 231 and 331, microphone amplifiers 232 and 332 that amplify an audio signal, and interphone transmission circuits 233 and 333 that modulate the amplified audio signal into an audio signal carrier wave and transmit it. ing. The receivers 25 and 35 output interphone receiving circuits 253 and 353 that demodulate the received audio signal carrier wave to audio signals, speaker amplifiers 252 and 352 that amplify the demodulated audio signals, and output the amplified audio signals. Speakers 251 and 351.

  The microcomputers 21 and 31 are for realizing various operation controls. In particular, the microcomputers 21 and 31 are designed to realize an intercom function. The call control unit based on the operation of the call switches 271 and 371 by the user, the power supply circuits 24, 26, 34, The power switching control unit that manages the switching of power supply / power cutoff by 36, and the call state of the transmission units 23 and 33 and the reception units 25 and 35 are monitored to detect the call state (transmission or reception). Then, various controls such as output control of the call state detection information to the power supply switching control unit are executed. Here, in the call control by the call control unit, the kitchen remote controller 2 and the bathroom remote controller 3 are configured to execute different controls as described later. That is, since the user who operates the bathroom remote controller 3 is in the bathroom for bathing, the telephone switch 371 can be operated with fewer operations than the kitchen remote controller 2 when making a call. For this reason, when a call is made from the kitchen remote control 2 to the bathroom remote control 3, the call is controlled by the press talk method, and when a call is made from the bathroom remote control 3 to the kitchen remote control 2, the call is controlled by the simplified hands-free method. It has become.

  The power supply switching control unit switches the power supply circuits 24, 26, 34, and 36 to the power supply state when the call control unit is switched to a call ready state, and receives the call state detection information output when the call is ready. When the current call state is the transmission state, the power supply by the power supply circuits 26 and 36 to the interphone reception circuits 253 and 353 of the reception units 25 and 35 is cut off and switched, while the current call state is the reception state. The power supply by the power supply circuits 24 and 34 to the interphone transmission circuits 233 and 333 of the transmitters 23 and 33 is cut off and switched.

  Hereinafter, the call control by the call control unit will be described while showing the call procedure by the intercom function based on the operation of the call switches 271 and 371. First, when both the call switches 271 and 371 are in a non-operating state (a state in which no push operation has been performed yet), the intercom functions of the kitchen remote control 2 and the bathroom remote control 3 are inactivated.

  Next, when calling from the kitchen remote control 2 to the bathroom remote control 3, first, the call switch 271 of the kitchen remote control 2 is pressed once to activate the intercom function. Specifically, when the call switch 271 is operated to be opened once, a call request signal is transmitted from the communication circuit 22 to the bathroom remote controller 3 in response to a command from the microcomputer 21 that has received the operation signal. This is received by the communication circuit 32 of the bathroom remote control 3, and a reception signal is returned from the communication circuit 32 in response to a command from the microcomputer 31 that has received the output of reception. Then, when the kitchen remote controller 2 receives this reception signal, a power supply command is output from the microcomputer 21 to the power supply circuits 24 and 26, and the transmitter 23 and receiver 25 are activated to be in an operating state. On the side of the bathroom remote controller 3, upon receiving the call request signal, a power supply command is output from the microcomputer 31 to the power supply circuits 34 and 36, and the transmitter 33 and receiver 35 are activated and activated. Yes. As described above, both the kitchen remote controller 2 and the bathroom remote controller 3 enter the interphone mode, and the intercom function becomes effective.

  Subsequently, when the call switch 271 of the kitchen remote control 2 is continuously pressed (operation to keep pressing), the kitchen remote control 2 can make a call to the bathroom remote control 3 while the continuous press operation is continued, that is, the kitchen remote control 2 It becomes a transmission state. In this state, the voice spoken by the user to the microphone 231 of the kitchen remote controller 2 becomes an audio signal, is amplified by the microphone amplifier 232, is modulated into an audio carrier wave by the interphone transmission circuit 233, and is transmitted to the connection line 5. This is demodulated by the intercom receiving circuit 353 of the bathroom remote control 3, and the demodulated audio signal is amplified by the speaker amplifier 352 and then output from the speaker 351. At the same time, since the kitchen remote controller 2 is in the transmitting state and the bathroom remote controller 3 is in the receiving state, the kitchen remote controller 2 side cuts off the power supply circuit 26 by the microcomputer 21 and switches the receiving unit 25 (interphone receiving circuit 253 and speaker). While the current supply to the amplifier 252) is stopped, on the bathroom remote controller 3 side, the power supply circuit 34 is cut off and switched by the microcomputer 31 to stop the current supply to the transmitter 33 (interphone transmission circuit 333 and microphone amplifier 332). .

  On the other hand, the call switch 271 of the kitchen remote controller 2 is stopped and the call switch 271 is released, or the call switch 271 is not operated (push operation is not performed) in the intercom mode. State), the bathroom remote controller 3 is in a state in which a call can be made from the bathroom remote controller 3 to the kitchen remote controller 2 without pressing the call switch 371, that is, the bathroom remote controller 3 is in a transmission state. In this state, the voice spoken by the user to the microphone 331 of the bathroom remote controller 3 becomes an audio signal, is amplified by the microphone amplifier 332, is modulated into an audio carrier wave by the interphone transmission circuit 333, and is transmitted to the connection line 5. This is demodulated by the interphone receiving circuit 253 of the kitchen remote controller 2, and the demodulated audio signal is amplified by the speaker amplifier 252 and then output from the speaker 251. When the telephone remote controller 3 is in a call state to the kitchen remote controller 2, the kitchen remote controller 2 is in a receiving state and the bathroom remote controller 3 is in a transmitting state. The power supply circuit 36 is cut off and switched by the microcomputer 31 on the side of the bathroom remote controller 3 while the current is not supplied to the transmitter 23 (interphone transmission circuit 233 and microphone amplifier 232). The current supply to the circuit 353 and the speaker amplifier 352) is stopped.

  As described above, when the kitchen remote controller 2 is ready to transmit, the current supply to the receiver 25 and the transmitter 33 of the bathroom remote controller 3 that are not used can be stopped, and conversely the bathroom remote controller 3 can transmit. In this state, it is possible to stop the current supply to the receiver 35 that is not used and the transmitter 23 of the kitchen remote controller 2. As a result, current consumption can be reduced and power saving can be improved. This also leads to an improvement in power saving in the entire hot water supply system.

<Implementation form>
Figure 3 shows a kitchen remote control 2a and bathroom remote controller 3a according to the implementation embodiments. Hereinafter, the same components as reference embodiment and will not be repetitively described bear the same reference numerals as in Reference Embodiment. Even in the case where the same reference numerals are assigned, the matters to be particularly mentioned are partially provided with configurations different from the reference embodiment.

The implementation embodiment in addition to those microcomputers 21 and 31 of the kitchen remote controller 2a and bathroom remote controller 3a has been described with reference embodiment, furthermore, in that it executes the control based on the voice signal detection unit 211 and 311, it differs from the reference embodiment. And, in the implementation form, by detecting the audio signal by monitoring the transmission section 23, 33 and earpiece 25 and 35 by the speech signal detector 211 and 311, the call state that transmission state or reception state Even if there is a call, it is detected whether or not a call is actually made, and the current supply to the microphone amplifiers 232 and 332 or the speaker amplifiers 252 and 352 is cut off (stopped) during a time period when the call is not made. ing. In other words, not only the current supply to the interphone transmission circuit 233 or 333 or the interphone reception circuits 253 and 353 that are not used in the reference mode is cut off (stopped), but also on the side that is in the use state. The current supply to the microphone amplifiers 232 and 332 or the speaker amplifiers 252 and 352 is also cut off (stopped) during a time period when the audio signal is not actually flowing. When a call is made from the kitchen remote control 2a to the bathroom remote control 3a, the call is controlled by the press talk method. When a call is made from the bathroom remote control 3a to the kitchen remote control 2a, the call is controlled by a simplified hands-free method. This is the same as the reference form.

  In the audio signal detection units 211 and 311, the voltage between the microphone amplifiers 232 and 332 and the interphone transmission circuits 233 and 333 in the transmission units 23 and 33, and the speaker amplifiers 252 and 352 in the reception units 25 and 35 and the interphones. The voltage between the receiving circuits 253 and 353 is input by A / D, respectively, and the presence or absence of fluctuation is monitored. On the other hand, if there is a fluctuation of a predetermined level or more in the reception units 25 and 35, it is determined that the reception state is established as a voice signal detection. In the power supply switching control unit, the power supply circuits 24, 26, 34, and 36 are switched to the power supply state when the call control unit is switched to the call ready state. If the current call state is determined to be the transmission state, the power supply by the power supply circuits 26 and 36 to the reception units 25 and 35 is switched off. On the other hand, if the current call state is determined to be the reception state, the transmission unit 23, The power supply by the power supply circuits 24 and 34 to the power supply 33 is cut off and switched.

  If the conversation switch 271 of the kitchen remote control 2a is continuously pressed (operation to keep pressing) and the continuous state of the operation is continued, the user enters the state of the transmission from the kitchen remote control 2a to the bathroom remote control 3a. The voice spoken to the microphone 231 becomes a voice signal, is amplified by the microphone amplifier 232, is modulated into a voice carrier wave by the intercom transmission circuit 233, and is transmitted to the connection line 5. This is demodulated by the intercom receiving circuit 353 of the bathroom remote controller 3a, and the demodulated audio signal is amplified by the speaker amplifier 352 and then output from the speaker 351. When a call is made from the kitchen remote controller 2a to the bathroom remote controller 3a, the kitchen remote controller 2a is in the transmitting state and the bathroom remote controller 3a is in the receiving state as in the first embodiment. The microcomputer 21 cuts off the power supply circuit 26 to stop the current supply to the receiver 25 (interphone receiving circuit 253 and speaker amplifier 252), while the bathroom remote controller 3a turns off the power supply circuit 34 with the microcomputer 31. Then, the current supply to the transmitter 33 (interphone transmission circuit 333 and microphone amplifier 332) is stopped.

  In addition, in the kitchen remote controller 2a, the audio signal detection unit 211 detects whether or not an audio signal flows between the microphone amplifier 232 of the transmitter 23 and the interphone transmission circuit 233, and if the audio signal is not detected. Even if the transmission is possible, the current supply to the microphone amplifier 232 is cut off (stopped). That is, the current supply not only to the intercom receiving circuit 253 of the receiver 25 but also to the microphone amplifier 232 of the transmitter 23 is stopped. If an audio signal is detected, the current supply to the microphone amplifier 232 is instantaneously resumed to return to the state where transmission is possible. In the bathroom remote controller 3a, the audio signal detector 311 detects whether or not an audio signal flows between the speaker amplifier 352 of the receiver 35 and the intercom receiver circuit 353. Even in a talkable state, the current supply to the speaker amplifier 352 is cut off (stopped). That is, not only the transmitter 33 but also the current supply to the speaker amplifier 352 of the receiver 35 is stopped. If the audio signal is detected, the current supply to the speaker amplifier 352 is instantaneously resumed to return to the reception enabled state.

  On the other hand, the call switch 271 of the kitchen remote control 2a is stopped and the call switch 271 is released, or the intercom mode is entered and the non-operation state (the state where no push operation is performed) is made. Then, the bathroom remote controller 3a is in a state in which a call can be made from the bathroom remote controller 3a to the kitchen remote controller 2a without performing a push operation on the call switch 371, that is, the bathroom remote controller 3 is in a transmission state. In this state, the voice spoken by the user to the microphone 331 of the bathroom remote control 3 a becomes an audio signal, is amplified by the microphone amplifier 332, is modulated into an audio carrier by the interphone transmission circuit 333, and is transmitted to the connection line 5. This is demodulated by the interphone receiving circuit 253 of the kitchen remote controller 2 a, and the demodulated audio signal is amplified by the speaker amplifier 252 and then output from the speaker 251. When a call is made from the bathroom remote controller 3a to the kitchen remote controller 2a, the kitchen remote controller 2a is in a receiving state. Therefore, the power supply circuit 24 is switched off and the current to the transmitter 23 (interphone transmitter circuit 233 and microphone amplifier 232) is switched. On the other hand, since the bathroom remote controller 3a is in the transmission state, the power supply circuit 36 is cut off and switched, and the current supply to the receiver 35 (interphone receiving circuit 353 and speaker amplifier 352) is stopped.

  In addition, in the kitchen remote controller 2a, the audio signal detection unit 211 detects whether or not an audio signal flows between the speaker amplifier 252 and the intercom receiving circuit 253 of the receiver 25, and if the audio signal is not detected, Even in a state where reception is possible, the current supply to the speaker amplifier 252 is cut off (stopped). That is, not only the transmitter 23 but also the current supply to the speaker amplifier 252 of the receiver 25 is stopped. If an audio signal is detected, the current supply to the speaker amplifier 252 is instantaneously resumed to return to the reception enabled state. In the bathroom remote controller 3a, the audio signal detection unit 311 detects whether or not an audio signal flows between the microphone amplifier 332 of the transmitter 33 and the interphone transmission circuit 333. If the audio signal is not detected, Even when the transmission is possible, the current supply to the microphone amplifier 332 is cut off (stopped). That is, not only the reception unit 35 but also the current supply to the microphone amplifier 332 of the transmission unit 33 is stopped. If the audio signal is detected, the current supply to the microphone amplifier 332 is instantaneously resumed to return to the reception enabled state.

If the implementation form of this, the current supply to the reception section 25 and transmission section 33 which is not used when the kitchen remote controller 2 is sending state, when the reverse bathroom remote controller 3 becomes transmission state The current consumption to the receiver 35 and transmitter 23 that are not used can be stopped, and the current consumption can be reduced in the same manner as in the reference embodiment. Even in the receiving unit 35 or the transmitting unit 33 and the receiving unit 25, it is possible to detect a time zone in which no audio signal flows and to stop the current supply during the time zone, thereby reducing current consumption. Can be further advanced than the reference form. For this reason, it becomes possible to further improve the power saving performance than the reference embodiment.

<Other embodiments>
As described above, in the reference embodiment or the embodiment , in order to enable transmission from the kitchen remote controller 2 to the bathroom remote controller 3, the call switch 271 is continuously pressed, while the call switch 271 on the kitchen remote controller 2 side is in the non-operating state. For example, the switching method in the press talk system in which the telephone remote control 3 can be set in a state where it is possible to transmit the voice to the kitchen remote controller 2 without operating the telephone call switch 371 on the bathroom remote controller 3 side is described. For example, in either the kitchen remote controller 2 or the bathroom remote controller 3, if the call switch of the own device is continuously pressed, the state can be switched from the own device to another device.

2 Kitchen remote control (remote control device with intercom function)
3 Bathroom remote control (remote control device with intercom function)
4 Water heater (operated device)
21, 31 Microcomputer (control unit)
23, 33 Speaker 25, 35 Receiver 211, 311 Voice signal detector 271 371 Call switch (call operation unit)

Claims (2)

In a remote control device with an intercom function, comprising a remote control function capable of remotely controlling a device to be operated and an interphone function enabling a call between at least two remote control devices.
A control unit for controlling the operation of the intercom function, a transmitting unit that modulates and transmits an audio signal based on audio into an audio carrier, a receiving unit that demodulates the received audio carrier into an audio signal and outputs audio; A call operation unit for determining whether one of the two remote control devices is capable of transmitting speech and the other is capable of receiving speech, and individually supplying drive power to the transmitting unit and the receiving unit A power switching control unit for switching off and a voice signal detection unit for detecting the voice signal ;
Wherein, when the current call state is sending state it is by the power supply switching control unit, together with the blocking switching the supply of the drive power to the reception section, the call state of the current possible transmission Even if it is in a state, when the audio signal in the transmitter is not detected, the power switching control unit is configured to cut off and switch the drive power supply to at least some components of the transmitter that is,
Lee Ntahon function with remote control device, characterized in that. In a remote control device with an intercom function, comprising a remote control function capable of remotely controlling a device to be operated and an interphone function enabling a call between at least two remote control devices.
A control unit for controlling the operation of the intercom function, a transmitting unit that modulates and transmits an audio signal based on audio into an audio carrier, a receiving unit that demodulates the received audio carrier into an audio signal and outputs audio; A call operation unit for determining whether one of the two remote control devices is capable of transmitting speech and the other is capable of receiving speech, and individually supplying drive power to the transmitting unit and the receiving unit A power switching control unit for switching off and a voice signal detection unit for detecting the voice signal ;
Wherein, when the current call state is receiving possible state, by the power supply switching control unit, together with the blocking switching the supply of driving power to the transmission section, the call state of the current can listen state even, if the audio signal in the reception section is non-detection by the power supply switching control unit, that is configured to block switching the supply of the drive power to at least some components of the receiver portion ,
Lee Ntahon function with remote control device, characterized in that.

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