JP2009177339A - Intercom system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intercom system that can effectively utilize a function wherein a fire sensor and an intercom master unit interlock with each other not only in case of a fire, but also usually by making the intercom master unit to give voice notice requesting ventilation not only in case of the fire, but also when air in a house is dirty. <P>SOLUTION: The intercom system includes a door intercom slave unit 2 installed at the entrance outside the house, the intercom master unit 1 installed in the house and sending and receiving signals to and from the door intercom slave unit 2, and a plurality of smoke sense type fire sensors 11 installed in the house and generating a fire alarm when detecting a fire. Then when a second CPU (signal processing unit) 11a determines that ventilation is necessary based upon the degree of dirtiness of air detected by a dirtiness degree detector 11b in a fire sensor 11, the voice notice requesting ventilation is output from a first speaker (notification unit) 11c of the intercom master unit 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an intercom system.

  Due to the revision of the Fire Service Act of 2004, it has become mandatory to install fire alarms for homes nationwide, but as a conventional fire alarm, it can be installed on the ceiling or wall of a dwelling unit, Some fire alarms are triggered by detecting the smoke generated, and fire alarms are triggered when the alarm stop switch provided as a separate unit is operated. . Alternatively, fire alarms installed in each room such as the kitchen, living room, and bedroom are connected by signal lines, and the alarm signal is sent from the fire alarm that detects the occurrence of a fire to other fire alarms via signal lines. There is also a provision that fire alarms are issued from all fire alarms by sending.

  On the other hand, as shown in FIG. 4, an interphone master unit 1 ′ installed in the dwelling unit, a doorphone slave unit 2 ′ connected to the interphone master unit 1 ′ and installed at the entrance outside the dwelling unit, and a gas sensor (for example, scattering) Optical smoke detector) 11 ′, and when a visitor operates the call button 2a ′ of the door phone slave 2 ′, a ringing sound for calling a resident is output from the interphone master 1 ′. By operating the call button 1g ′ of the master unit 1 ′, a call can be made with a visitor via the interphone master unit 1 ′ and the door phone slave unit 2 ′, and in conjunction with the gas sensor 11 ′ that detects a fire. An intercom system has been proposed in which the interphone master unit 1 'issues a fire alarm (see Patent Document 1).

The interphone master unit 1 ′ includes a call circuit 1c ′ for enabling a dweller to make a call via a visitor, the interphone master unit 1 ′, and the door phone slave unit 2 ′, and a signal line L1 ′. When an emergency signal is received from the gas sensor 11 ′ connected via the alarm unit 1q ′ for outputting a signal to the CPU 1a described later when the emergency signal is received or when the external emergency button 3 ′ is pressed, and for outputting a sound Speaker 1b ', switch 1e' for switching the connection partner of speaker 1b 'to call circuit 1c' or alarm unit 1q ', microphone 1f' for inputting voice, and a resident in a call with a visitor A call button 1g 'for operating the phone, a call detection circuit 1h' for detecting a call signal from the intercom 2 ', a chime sound generation circuit 1d' for generating a chime sound from the speaker 1b ', and a call detection circuit 1h It also includes a CPU 1a ′ that receives a signal from the alarm unit 1q ′ and operates a chime sound generating circuit 1d ′ or a switch 1e ′.
JP-A-8-70361

  However, the intercom system having the configuration shown in FIG. 4 has a function of issuing a fire alarm in conjunction with the gas sensor 11 ′ that detects a fire and the interphone master unit 1 ′ only when a fire occurs. At times, the function of interlocking the gas sensor 11 ′ and the intercom master unit 1 ′ has not been effectively utilized.

  The present invention has been made in view of the above, and an object of the present invention is to provide an interphone system that can effectively utilize a function in which a fire detector and an interphone master unit are interlocked even during normal times.

  The invention of claim 1 includes a doorphone slave unit installed outside a dwelling unit, an interphone master unit installed inside the dwelling unit for transmitting and receiving signals to and from the doorphone slave unit, and a smoke-sensitive fire installed in the dwelling unit. The fire detector is configured to receive light radiated from a light projecting element to a monitoring space in which airborne particles including smoke particles exist, and is configured to receive light based on the amount of light received by the light receiving element. The degree of dirt detection unit that detects the degree of dirt in the air, the transmission part that sends a signal to the intercom master unit, the necessity of ventilation and the presence or absence of fire according to the degree of air dirt detected by the degree of dirt detection unit A signal processing unit that controls the transmission unit to transmit a ventilation request signal to the interphone main unit when it is determined that ventilation is necessary, and to transmit a fire signal to the interphone main unit when it is determined that there is a fire. The interphone master unit has a receiving unit that receives a signal from the fire detector, and a notification unit that issues a fire alarm and a voice notification that requests ventilation, and the receiving unit receives the fire signal. Sometimes the notification unit issues a fire alarm and when the ventilation request signal is received, the notification unit performs voice notification requesting ventilation.

  According to the present invention, the fire detector determines whether there is a need for ventilation and whether there is a fire according to the degree of air contamination detected by the transmission unit that transmits a signal to the interphone master unit and the degree of dirt detection unit. And a signal processing unit that controls the transmission unit so that a ventilation request signal is transmitted to the interphone master unit when it is determined that ventilation is necessary, and a fire signal is transmitted to the interphone master unit when it is determined that there is a fire. The interphone master unit has a receiving unit that receives a signal from the fire detector. When the receiving unit receives a fire signal, the notifying unit issues a fire alarm, and when the receiving unit receives a ventilation request signal, the notifying unit Since the voice notification requesting ventilation can be output, a more appropriate treatment according to the degree of dirt in the dwelling unit can be obtained for the dweller. In addition, the function of linking the fire detector and the intercom master can be effectively utilized by playing a role of encouraging the residents to ventilate even when a fire does not occur.

  According to a second aspect of the present invention, in the first aspect of the invention, when the intercom master unit receives both the ventilation request signal and the fire signal at the receiving unit, the notification unit gives priority to the fire signal. It is characterized by issuing a fire alarm.

  According to the present invention, when the interphone base unit receives both the ventilation request signal and the fire signal at the reception unit, the fire signal is prioritized, so the notification unit of the interphone base unit provides ventilation. Even when a voice notification is requested, a fire alarm can be issued when a fire occurs, and the residents can be prevented from escaping.

  According to the first aspect of the present invention, when the signal processing unit of the fire sensor determines that ventilation is necessary based on the degree of air contamination detected by the contamination level detection unit of the fire sensor, the transmission unit of the fire sensor Since a ventilation request signal is sent from the receiver to the interphone master unit and the notification unit of the interphone master unit that has received the ventilation request signal at the receiving unit can output a voice notification requesting ventilation, fire detection is possible even when a fire does not occur Can effectively use the function of the device and the intercom master unit.

  Hereinafter, the intercom system according to the present embodiment will be described with reference to FIGS.

  The intercom system according to this embodiment includes a doorphone slave unit 2 installed outside a dwelling unit, and a signal between the doorphone slave unit 2 installed inside the dwelling unit and connected to the doorphone slave unit 2 via a two-wire signal line L2. Intercom base unit 1 for transmitting and receiving, and a plurality of smoke detection type fire detectors 11 installed in the dwelling unit and connected to intercom base unit 1 via two-wire signal line L1 and having a function of issuing a fire alarm, It has.

  The intercom base unit 1 has a first speaker 1b, a microphone 1f for a resident to input voice to the intercom base unit 1, and a resident using the first speaker 1b and the microphone 1f for a call. A call circuit 1c for enabling the communication, a sound generation circuit 1d for outputting a ringing tone for calling a resident from the first speaker 1b, and a connection partner of the first speaker 1b as the call circuit 1c or The switch 1e for switching to the sound generating circuit 1d, the call button 1g for setting the interphone base unit 1 in a state where the call can be made with the visitor by the operation of the dweller, and the call button 2a of the door phone slave unit 2 are operated. A call detection circuit 1h that detects a call signal transmitted from the doorphone slave unit 2 via the two-wire signal line L2 and the interphone master unit 1 that is supplied with power from the commercial power source AC. And a power supply circuit 1n for outputting the drive voltage generated by the power supply circuit 1m to the two-wire signal line L1. Here, the 1st speaker 1b outputs the audio | voice notification which requests | requires a fire alarm and ventilation, and plays the role as an alerting | reporting part which alert | reports that the occurrence of a fire or the ventilation of the room was needed to the resident. In addition, the intercom master unit 1 is controlled by a first voltage detection circuit 1i that detects the level of the line voltage of the two-wire signal line L1, and a line between the two-wire signal line L1 controlled by a first CPU 1a described later. A first voltage level fluctuation control circuit 1j that fluctuates the voltage level, an alarm stop button 1k for stopping a fire alarm or a voice notification requesting ventilation output from the first speaker 1b, and a call detection circuit 1h When a call signal is received or when the first voltage detection circuit 1i detects that the level of the line voltage of the two-wire signal line L1 is controlled to a predetermined level, the sound generation circuit 1d is switched. And a first CPU 1a for operating the first voltage level fluctuation control circuit 1j.

  In addition, as shown in FIG. 1, the fire detector 11 outputs a fire alarm from a light scattering type dirt degree detection unit 11b that detects the degree of dirt of air, the second speaker 11d, and the second speaker 11d. Alarm sound generating circuit 11c for detecting the voltage, a second voltage detecting circuit 11e for detecting the level of the line voltage generated in the two-wire signal line L1, and a two-wire signal line L1 controlled by a second CPU 11a described later. A second voltage level fluctuation control circuit 11f for changing the level of the line voltage, an alarm stop switch 11p for stopping the fire alarm, and an alarm stop string 11g for operating the alarm stop switch 11p, When the second voltage detection circuit 11e detects that the level of the line voltage of the two-wire signal line L1 is set to a predetermined level, or the air detected by the contamination degree detection unit 11b From contamination degree, and a second CPU11a operating the second voltage level variation control circuit 11f when the second CPU11a determines that there need fire with or ventilation.

  Here, the interphone master unit 1 has an interphone function that allows a resident to make a call with a visitor via the interphone master unit 1 and the door phone slave unit 2. When the call button 2a of the machine 2 is operated, a call signal is output to the two-wire signal line L2, and when the call detection circuit 1h of the intercom base unit 1 detects the call signal, the first CPU 1a switches the switch 1e. Is switched to the sound generation circuit 1d side, the sound generation circuit 1d and the first speaker 1b are connected, and a ringing sound for calling a resident is output from the first speaker 1b. Here, when the call button 1g is operated by a resident, the first CPU 1a switches the switch 1e to the call circuit 1c side to connect the call circuit 1c and the first speaker 1b, thereby A person can make a call with a visitor via the interphone master unit 1 and the door phone slave unit 2.

  In addition, the intercom system according to the present embodiment has the above-described intercom function, and a security system is configured by the interphone master unit 1 and the plurality of fire detectors 11.

  Here, the power supply circuit 1m of the interphone master unit 1 generates not only the drive voltage of the interphone master unit 1, but also the drive voltage from the power supply circuit 1n to the plurality of fire detectors 11 via the two-wire signal line L1. Supply. Therefore, since the driving voltage is supplied from the intercom base unit 1 to the plurality of fire detectors 11 through the two-wire signal line L1, the fire detector 11 does not require a power supply circuit, thereby reducing the cost of the entire system. be able to. Here, the line voltage of the two-wire signal line L1 is maintained at a predetermined level (V1) in a normal state.

  The contamination degree detector 11b of the fire detector 11 includes a photodiode that receives light scattered on the monitoring space 114 from the light projecting element 111 made of a light emitting element such as an LED, and the like, scattered by floating particles such as smoke. The degree of air contamination is detected based on the amount of light received by the light receiving element 112. Here, the second CPU 11a determines the necessity of ventilation and the presence or absence of a fire according to the degree of dirt in the air in the room of the dwelling unit detected by the dirt degree detection unit 11b. In the case where the amount of light received by the light receiving element 112 is equal to or greater than a ventilation notification threshold set in advance for determining a ventilation request and less than a fire alarm threshold set in advance for determining the occurrence of a fire (hereinafter referred to as a ventilation notification area), the second The CPU 11a determines that ventilation is necessary, and controls the line voltage level of the two-wire signal line L1 to the first notification level V2 (<V1) by the second voltage level fluctuation control circuit 11f. When the amount of light received by the light receiving element 112 is equal to or greater than the fire alarm threshold (hereinafter referred to as a fire alarm area), the second CPU 11a determines that there is a fire and activates the alarm sound generating circuit 11c to activate the second alarm sound generation circuit 11c. While outputting a signal to the speaker 11d, the second voltage level fluctuation control circuit 11f changes the level of the line voltage of the two-wire signal line L1 to the second notification level V3 which is lower than the first notification level V2. Let me control. In other words, the second voltage level fluctuation control circuit 11f controls the level of the line voltage of the two-wire signal line L1 to the first notification level V2, so that the ventilation request signal is sent from the fire detector 11 to the intercom master unit 1. Is configured to transmit a fire signal from the fire detector 11 to the intercom master unit 1 by controlling the line voltage level of the two-wire signal line L1 to the second notification level V3. . Further, when the second CPU 11a determines that ventilation is necessary or there is a fire, the second voltage level fluctuation control circuit 11f supplies the line voltage of the two-wire signal line to the first notification level V2 or the second voltage level. It plays a role as a signal processing unit to be controlled to the notification level V3. Here, when the level of the line voltage of the two-wire signal line L1 is the first notification level, the second speaker 11d continues to issue the fire alarm, and when the level is the second notification level, the second speaker 11d Speaker 11d outputs a voice notification requesting ventilation.

  Here, the second CPU 11a of the fire detector 11 other than the fire detector 11 determined that there is a fire in the room of the dwelling unit or the necessity of ventilation in the dwelling unit is the second voltage detection circuit 11e. Is monitoring the level of the line voltage of the two-wire signal line L1 detected. When the second CPU 11a determines that the level of the line voltage detected by the second voltage detection circuit 11e is set to the first notification level V2 or the second notification level V3, an alarm sound is generated. A signal is output from the circuit 11c to the second speaker 11d. As a result, in conjunction with the fire sensor 11 determined to have the above-described fire or the need for ventilation, another fire sensor 11 also issues a fire alarm from the second speaker 11d or requests ventilation. Output audio notification.

  By the way, the first voltage detection circuit 1i of the intercom master unit 1 detects the level of the line voltage of the two-wire signal line L1 set by the second voltage level fluctuation control circuit 11f of the fire detector 11. It is. That is, the 1st voltage detection circuit 1i comprises the receiving part which receives the ventilation request signal or the fire signal transmitted to the intercom main unit 1 from the fire detector 11. Here, the first CPU 1a monitors the level of the line voltage of the two-wire signal line L1 detected by the first voltage detection circuit 1i, and the first CPU 1a reports that the voltage level is the first notification. When it is determined that the level V2 (<V1) or the second notification level V3 (<V1) is set, the switching unit 1e is switched to the sound generation circuit 1d side, and the sound generation circuit 1d and the first speaker 1b are switched. To output a signal from the sound generation circuit 1d to the first speaker 1b. As a result, the first speaker 1b of the intercom base unit 1 outputs a fire alarm or a voice notification requesting ventilation. If it is determined that at least one fire sensor 11 has a fire in the dwelling unit or needs to be ventilated in the dwelling unit, all the other fire detectors 11 and the intercom master unit are linked with the fire sensor 11. 1 can output a fire alarm or voice notification requesting ventilation.

  Here, any one of the alarm stop strings 11g provided in each of the fire detectors 11 in a state in which all of the fire detector 11 and the intercom master unit 1 are outputting a fire alarm or a voice notification requesting ventilation. The alarm stop switch 11p is operated, and only the fire detector 11 that has determined that there is a fire in the dwelling unit or that ventilation is necessary in the dwelling unit continues to issue a sound alert or request a sound notification that requires ventilation. The output is continued, and the other fire detectors 11 and the intercom master unit 1 stop outputting a fire alarm or a voice notification requesting ventilation for a predetermined time.

  Specifically, when the alarm stop string 11g provided in the fire detector 11 is pulled, the alarm stop switch 11p is operated, and the line voltage level of the two-wire signal line L1 is set to the second notification level for a predetermined time. An alarm stop level V4 lower than V3 is set. Here, when the second CPU 11a of the fire detector 11 determines that the line voltage level of the two-wire signal line L1 is set to the alarm stop level V4, there is a fire in the dwelling unit or ventilation in the dwelling unit. In the fire detector 11 determined to be necessary, a signal is continuously output from the alarm sound generation circuit 11c to the speaker 11d. In the other fire detectors 11, the level of the line voltage of the two-wire signal line L1 is an alarm. Output of the signal from the alarm sound generation circuit 11c to the speaker 11d is stopped for a predetermined time set at the stop level V4. Here, the first CPU 1a of the intercom master unit 1 also monitors the line voltage level of the two-wire signal line L1 detected by the first voltage detection circuit 1i, and the line voltage level stops the alarm. When it is determined that the level is set to V4, the signal output from the sound generation circuit 1d to the speaker 1b is stopped for a predetermined time, so that the fire alarm or the ventilation request notification is stopped. Therefore, in the fire detector 11 that has been determined that there is a fire in the dwelling unit or that ventilation is necessary in the dwelling unit, the second speaker 11d continues to issue a fire alarm or output a voice notification requesting ventilation. On the other hand, the other fire detectors 11 stop outputting a fire alarm or a voice notification requesting ventilation for a predetermined time. In other words, the fire alarm 11 or the intercom master unit 1 is required to issue a fire alarm or ventilate, except for the fire sensor 11 that has been determined that there is a fire in the dwelling unit or that ventilation is necessary in the dwelling unit. The voice notification output can be stopped.

  Further, in the intercom system of the present embodiment, other fire detectors 11 except for the fire detector 11 determined that there is a fire in the dwelling unit or the necessity of ventilation in the dwelling unit also by the operation on the interphone master unit 1 side. In addition, for the intercom master unit 1, the output of the fire alarm or the voice notification requesting the ventilation can be stopped for a predetermined time.

  Specifically, when the alarm stop button 1k of the interphone master unit 1 is operated in a state where all of the plurality of fire detectors 11 and the interphone master unit 1 issue a fire alarm, the first of the interphone master unit 1 is operated. The CPU 1a stops the signal output from the sound generation circuit 1d of the intercom base unit 1 to the first speaker 1b for a predetermined time, and the first voltage level fluctuation control circuit 1j controlled by the first CPU 1a has 2 The level of the line voltage of the linear signal line L1 is set to the alarm stop level V4 for a predetermined time. Thus, in the same manner as described above, fire alarms are issued for the other fire detectors 11 and the intercom master unit 1 except for the fire detectors 11 that are judged to have fire in the dwelling unit or need ventilation in the dwelling unit. It is possible to stop the output of a notification or a voice notification requesting ventilation.

  As described above, the alarm stop string 11g provided in each of the fire detectors 11 is pulled in a state where all of the fire detector 11 and the intercom master unit 1 are outputting a fire alarm or a voice notification requesting ventilation. Alternatively, by operating the alarm stop button 1k provided in the intercom base unit 1, it is possible to specify a place where a fire is occurring or a place where ventilation is necessary.

  By the way, as shown in FIG. 2, the contamination degree detection unit 11b is arranged in a housing 101 made of resin so that the light projecting element 111 and the light receiving element 112 are orthogonal to each other. Light that is irradiated from the light projecting element 111 to the monitoring space 114 and scattered by suspended particles such as smoke is received by the light receiving element 112. In addition, a light shielding portion 102 that shields light directed from the light projecting element 111 directly toward the light receiving element 112 is continuously formed in the housing 101.

  Here, FIG. 3 shows a change in the amount of light received by the light receiving element 112 of the dirt degree detection unit 11b when the degree of dirt of the air in the room where the fire detector 11 is installed increases with time. As shown in FIG. 3, when the air in the room where the fire detector 11 is installed in the dwelling unit is hardly contaminated and there are almost no suspended particles, there are almost no suspended particles in the monitoring space 114, and light projection is performed. Since light emitted from the element 111 and scattered by the suspended particles hardly enters the light receiving element 112, the amount of light received by the light receiving element 112 changes at a low level. However, when the degree of air pollution in the room increases, the amount of suspended particles existing in the monitoring space 114 increases, and accordingly, the amount of light scattered by the suspended particles and incident on the light receiving element 112 increases. Further, when a fire occurs in the room, the amount of smoke particles existing in the monitoring space 114 further increases, and the amount of light incident on the light receiving element 112 further increases accordingly.

  Here, when the amount of light received by the light receiving element 112 is in the ventilation notification region, the second CPU 11a first notifies the second voltage level fluctuation control circuit 11f of the level of the line voltage of the two-wire signal line L1. Control to level V2. When the amount of light received by the light receiving element 112 is in the fire alarm region, the second CPU 11a notifies the second voltage level variation control circuit 11f of the level of the line voltage of the two-wire signal line L1 in the second notification. The level is controlled to V3.

  Thus, when the amount of light received by the light receiving element 112 is in the ventilation notification area, the second speaker 11d of the fire detector 11 and the first speaker 1b of the intercom master unit 1 are notified of the ventilation request, and the light receiving element When the amount of received light 112 reaches the fire alarm area, a fire alarm is issued. That is, the intercom system according to the present embodiment plays a role of encouraging the residents to ventilate according to the degree of air pollution in the dwelling unit, so that the fire detector 11 and the interphone master unit 1 are interlocked even when a fire does not occur. Functions can be used effectively. Moreover, since the intercom system of this embodiment can perform the voice notification which requests | requires a fire alarm or ventilation according to the dirt degree of the air in the dwelling unit in which the fire detector 11 was installed in the intercom main unit 1, It is possible to ask the dweller for a more appropriate treatment according to the degree of air pollution in the dwelling unit.

  In the intercom system according to the present embodiment, in the fire detector 11, when the amount of light received by the light receiving element 112 of the contamination degree detection unit 11b is in the ventilation notification region, the second voltage level variation control circuit 11f is configured to perform a two-wire signal. The line voltage level of the line L1 is set to the first notification level V2, and an audio notification requesting ventilation is broadcast from the first speaker 1b of the intercom base unit 1. Here, when the amount of light received by the light receiving element 112 reaches the fire alarm area, the second CPU 11a connects the second voltage level fluctuation control circuit 11f to the second voltage level fluctuation control circuit 11f even if the voice notification requesting ventilation is being broadcast. By setting the level of the line voltage of the expression signal line L1 to the second notification level V3, a fire alarm is issued from the first speaker 1b and the second speaker 11b. Thus, the interphone master unit 1 issues a fire alarm when the fire detector 11 detects a fire even during a voice notification requesting ventilation, so that it is possible to prevent the dweller from escaping.

It is a block diagram which shows the intercom system of embodiment. It is operation | movement explanatory drawing of a dirt degree detection part same as the above. The operation | movement explanatory drawing same as the above is shown. It is a block diagram which shows the intercom system of a prior art example.

Explanation of symbols

1 Interphone master unit 2 Door phone slave unit 1a First CPU
1b First speaker (notification unit)
1d Sound generation circuit 1i First voltage detection circuit (receiver)
1j First voltage level fluctuation control circuit 11 Fire detector 11a Second CPU (signal processing unit)
11b Dirt degree detection unit 11e Second voltage detection circuit 11f Second voltage level fluctuation control circuit (transmission unit)
111 Light Emitting Element 112 Light Receiving Element 114 Monitoring Space L1, L2 Two-wire Signal Line

Claims (2)

  A fire is provided with a doorphone slave unit installed outside the dwelling unit, an interphone master unit that transmits and receives signals to and from the doorphone slave unit installed inside the dwelling unit, and a smoke-sensitive fire detector installed inside the dwelling unit. The sensor is configured to receive light irradiated from a light projecting element to a monitoring space where airborne particles including smoke particles are present, and to detect the degree of air contamination based on the amount of light received by the light receiving element. Necessity of ventilation is determined by determining the necessity of ventilation and the presence or absence of a fire according to the degree of air contamination detected by the degree detection unit, the transmission unit that transmits a signal to the intercom master unit, and the contamination degree detection unit A signal processing unit that controls the transmission unit to transmit a ventilation request signal to the interphone base unit when it is determined to be present and to transmit a fire signal to the interphone base unit when it is determined that there is a fire. The master unit has a receiving unit that receives a signal from the fire detector, and a notification unit that issues a fire alarm and a voice notification that requests ventilation. When the receiving unit receives a fire signal, the notification unit An intercom system characterized in that when a fire alarm is issued and a ventilation request signal is received, a notification unit performs voice notification requesting ventilation.   The intercom master unit, when receiving both the ventilation request signal and the fire signal at the receiving unit, gives priority to the fire signal and issues a fire alarm from the notification unit. The intercom system according to 1.

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