JP5041866B2 - Fire alarm - Google Patents

Description

The present invention relates to a fire alarm device that detects a fire and outputs an alarm and has an insect repellent function.

  Conventionally, fire alarms have a fire detection unit that determines that a fire has occurred when the room temperature becomes abnormally high, or when the indoor smoke concentration exceeds a specified value. It has an alarm function that flashes the indicator light and notifies the surroundings that a fire has occurred.

There has also been proposed a fire alarm with an insect repellent function that diffuses an insect repellent on an insect repellent sheet, which is a volatile substance (see Patent Document 1).
JP-A-2005-293306

  However, such a fire alarm device requires a replacement work with a new insect repellent sheet when the insect repellent is diffused and the effect of repelling insects is lost, and maintenance is troublesome.

  Moreover, the replacement of the insect repellent sheet is performed at a high place where the fire alarm is installed, and even if the insect repellent sheet can be replaced after the fire alarm is removed from the installation place, the fire alarm is removed. The work is not a work at a high place, but is a difficult and dangerous work for the elderly and the physically weak.

  In addition, in the method using an insect repellent, an insect repellent effect can be expected for a specific type of insect, but it is difficult to simultaneously repel different types of insects.

An object of the present invention is to provide a fire alarm that is maintenance-free without using an insect repellent and that can repel insects against multiple types of insects.

In order to achieve this object, the present invention is configured as follows. First fire alarm of the invention, a fire determination unit that outputs a fire detection signal by detecting a fire, a frequency band insect sound signal hate alarm sound signal and insects of the frequency band used as a fire alarm sound an oscillator for outputting a repellent selection switch for selecting whether the insects except functions, to output the insect sound signal from the oscillation unit when selecting the insect repellent function in insect selection switch, when detecting fire in a fire determination unit Is equipped with an acoustic control unit that outputs an alarm sound signal from the oscillation unit, and as a fire determination unit, a smoke detection unit that receives scattered light due to smoke of light from the light emitting unit and outputs a smoke detection signal When equipped, the acoustic control unit outputs an insect repellent sound signal from the oscillating unit even when the insect repellent function is not selected by the insect repellent selection switch, and the sound output level output by the acoustic output unit is narrow including the smoke detecting unit. Propagate to range Ru switched to a low level.

  Here, the oscillating unit stores sound source data corresponding to each of the alarm sound signal and the insect-proof sound signal in a memory in advance, and repeatedly outputs the sound signal or the insect-proof sound signal by repeatedly reading the sound source data from the memory and performing DA conversion.

In addition, when the fire determination unit outputs a fire detection signal while the insect proof sound signal is being output from the oscillation unit, the acoustic control unit stops outputting the insect proof sound signal and switches the output to the alarm sound signal.

The fire alarm of the present invention further includes a human body detection unit that detects the presence of a person and outputs a human body detection signal, and the acoustic control unit outputs an insect-proof sound signal when the human body detection unit outputs the human body detection signal. To cut the human audible frequency band.

Oscillating unit sets in advance a plurality of kinds of insect sound signals having different frequency bands depending on the type of insect, the audio controller has a plurality of kinds of insect signal temporally switched at random is outputted from the oscillating unit.

First, the fire alarm device of the present invention includes a smoke detection unit that receives scattered light due to smoke of light from the light emitting unit and outputs a smoke detection signal, and a fire detection by detecting a fire from the smoke detection signal. A fire detection unit that outputs a signal, an oscillation unit that outputs an alarm sound signal in a frequency band used as a fire alarm sound and an insect repellent signal in a frequency band that insects dislike, an insect repellent selection switch that selects an insect repellent function, and an insect repellent An acoustic control unit that outputs an insect sound signal from the oscillating unit regardless of selection of the selection switch, and outputs an alarm sound signal from the oscillation unit when the fire determination unit outputs a fire detection signal, and an alarm sound signal or insect proof and an audio output unit for acoustically outputting the amplified sound signal, the audio controller, when selecting the insect repellent function by insect selection switch, the sound output at high levels of potent audio output as insect repellent function Is output from the case of the non-selected insect repellent function by insect selection switch, Ru is outputted from the sound output unit at a low level for propagating acoustic output in a narrow range that contains the smoke detection portion.

  The fire alarm device according to the present invention uses only the insect-proof sound generated by the electronic circuit without using the insect-repellent agent, thereby eliminating the need to replace the insect-proof sheet generated when the insect-repellent agent is used.

  Moreover, when a fire is detected during the output of the insect-proof sound, both the functions of the fire alarm device and the insect repellent device can be realized with a simple structure by stopping the output of the insect-proof sound and switching to the output of the alarm sound.

  When the presence of a person is detected, the fire alarm of the present invention is not harsh by cutting the human audible frequency band from the insect repellent sound that is being output, and the function of repelling insects without causing discomfort to the person Can be used.

  In addition, the insect repellent effect can be exerted on a plurality of kinds of insects by randomly switching and outputting a plurality of kinds of insect repellent sounds having different frequency bands according to the kinds of insects.

If the fire alarm is equipped with a smoke detector, the insect screen and the insect sheet that have been provided in the past can be eliminated by performing the insect control of the smoke detector together, and the structure of the smoke detector can be simplified. Furthermore, the work of cleaning the insect screen or replacing the insect screen is unnecessary.

  FIG. 1 is an explanatory view showing the external appearance of an embodiment of a fire alarm device according to the present invention, FIG. 1 (A) is a front view showing the installed state, and FIG. 1 (B) is a perspective view thereof. .

  The fire alarm 10 is composed of a main body 12 and a cover 14, and is attached to a wall surface of an arbitrary room in a house by an attachment portion 16 located at the upper part of the main body 12. The cover 14 protrudes in a dish shape at the center, and a smoke inlet 18 is opened around the cover 14.

  A smoke chamber (not shown) is incorporated inside the cover 14 including the smoke inlet 18, and smoke from a fire flows into the chamber through the smoke inlet 18, and a scattered light type including a light emitting element and a light receiving element. The smoke detector detects fire smoke.

  An infrared transmission filter 20 that also serves as a protective cover for an infrared detection element for detecting a human body is provided in the center of the dish-like protrusion of the cover 14.

  An acoustic hole 22 is provided on the lower left side of the cover 14, and an acoustic output speaker is accommodated in the interior corresponding to the acoustic hole 22. An alarm indicator lamp 24 is provided on the lower right side of the cover 14, and an alarm stop button 26 that is cantilevered by a U-shaped cutout is formed between the acoustic hole 22 and the alarm indicator lamp 24. An alarm stop switch used for stopping an alarm is incorporated in the interior of 26.

  An insect repellent indicator lamp 28 is provided on the upper left side of the cover 14. An insect repellent selection button 30 that is cantilevered by a U-shaped cutout is formed between the acoustic hole 22 and the insect repellent indicator lamp 28, and an insect repellent selection switch used for selection of the insect repellent function is provided inside the insect repellent selection button 30. It has been incorporated.

  FIG. 2 is a block diagram showing a circuit configuration of an embodiment of a fire alarm according to the present invention. In FIG. 2, the fire alarm device 10 of the present invention includes a battery 32, a noise absorbing unit 34, an alarm stop switch 36, a control unit 38, an insect repellent selection switch 48, a smoke detector 50, an acoustic output unit 56, and an alarm indicator lamp unit 62. Insect repellent display lamp section 64, human body detection section 66, and voltage drop detection section 68.

  The battery 32 supplies power to the fire alarm 10, and the noise absorber 34 stabilizes the circuit voltage supplied from the battery 32. The control unit 38 includes a fire determination unit 40, an acoustic control unit 42, an oscillation unit 44, and a memory 46, and performs fire determination and human body detection determination at predetermined timings by executing a program.

  Further, the control unit 38 controls the lighting of the alarm display lamp unit 62 and the insect repellent display lamp unit 64, stops the alarm by the alarm stop switch 36, selects the insect repellent function by the insect repellent selection switch 48, monitors the power supply voltage by the voltage drop detection unit 68, and the like. I do.

  The fire detection by the fire determination unit 40 may be smoke detection or heat detection, but smoke detection is taken as an example in the present embodiment. The smoke detector 50 includes a light-emitting element 52 and a light-receiving element 54. Smoke detection is performed periodically, for example, at a cycle of 10 seconds. The scattered light reflected by the smoke emitted by driving the infrared light-emitting diode is incident on the light receiving element 54, for example, a photodiode, converted into a photocurrent, and further converted into a voltage signal to determine a fire. Output to 40.

  The fire determination unit 40 periodically acquires a signal level from the light receiving element 54 of the smoke detection unit 50 to determine a fire. However, in order to prevent false alarms, the fire determination unit 40 warns when a fire is determined twice in succession. If the fire is not judged twice consecutively, the alarm is stopped.

  The human body is also detected periodically, and the human body detection unit 66 includes an infrared detection element. For example, the output level of the infrared detection element is acquired at a cycle of 10 seconds to determine the presence or absence of the human body. The smoke detection cycle and the human body detection cycle do not have to be 10 seconds.

  The oscillating unit 44 repeatedly reads out sound source data corresponding to each of the alarm sound signal and the insect-proof sound signal stored in advance in the memory 46, performs DA conversion, and outputs the sound source data to the sound output unit 56.

  Further, the oscillating unit 44 presets a plurality of types of insect-proof sound signals having different frequency bands depending on the type of insect, and the acoustic control unit 42 temporally sets the plurality of types of insect-proof sound signals as shown in FIG. Randomly switching and outputting from the oscillation unit 44.

  In the present embodiment, the oscillating unit 44 stores in advance the sound source data having a predetermined length having a predetermined frequency band in the memory 46, repeatedly reading it, DA converting it, and outputting it.

  The sound source data is generated from, for example, a synthesized signal of a plurality of oscillators or an output signal of a frequency synthesizer, and the frequencies f1 to f2 are obtained by changing the frequency in a necessary frequency band by f by f1 to f2, and f1 + Δf, f1 + 2Δf,. ... F1 + nΔf and f2 are generated and AD-converted data of a fixed length is generated, and the data obtained by adding and synthesizing the data is used as sound source data. In this case, the resolution is determined by the magnitude of Δf.

  In the case where the oscillator 44 is an oscillator that oscillates at a single frequency, the frequency sweep data in which the frequency is continuously changed in the range of f1 to f2 is used as sound source data. It is the same as generating the necessary frequency band.

  In the example of FIG. 3, the insect repellent sound signal output from the oscillating unit 44 is classified into four types: a frequency band signal that mosquitoes hate, a frequency band signal that hate flies, a frequency band signal that ants hate, and a frequency band signal that hate cockroaches. It shows how the output order and output time are switched randomly.

  The time width of each frequency band is preset according to each insect, and does not need to be the same time width. Also, the types of insects and the number of frequency band signals to be created are not limited to this.

  Further, the insect repellent sound signals to be output may not be switched randomly with respect to the output order and the output time, and the predetermined output order and the predetermined output time may be repeated. Further, only the output time may be switched randomly without changing the output order, or only the order may be switched randomly without changing the output time.

  Referring to FIG. 2 again, the sound control unit 42 outputs an insect repellent sound signal from the oscillation unit 44 when the insect repellent function is selected by the insect repellent selection switch 48 and oscillates when the fire determination unit 40 detects a fire. An alarm sound signal is output from the unit 44.

  Here, when the fire determination unit detects a fire during the output of the insect-proof sound signal from the oscillating unit 44, the acoustic control unit 42 stops the output of the insect-proof sound signal and switches to the output of the alarm sound signal. When the sound output unit 56 receives an analog signal output from the oscillating unit 44 as an insect-proof sound signal or an alarm sound signal, the sound output unit 56 outputs the sound amplified by the amplification unit 58 through the speaker 60.

  The acoustic output unit 56 acoustically outputs an alarm sound signal and an insect-proof sound signal in a frequency band of approximately 1 to 45 kHz, but conversion with a single speaker is usually difficult in such a wide band. Therefore, it is preferable to divide the band and provide the acoustic vibrator (speaker) and the ultrasonic vibrator separately.

  The alarm indicator lamp unit 62 receives an output when the fire determination unit 40 determines a fire, and blinks the alarm indicator lamp 24 such as an LED shown in FIG. 1 at a predetermined cycle.

  The alarm stop switch 36 is actuated by pressing the alarm stop button 26 shown in FIG. 1, and when the alarm stop switch 36 is actuated, the control unit 38 outputs an alarm sound and an alarm display by the sound output unit 56 for a predetermined time, for example, 6 minutes. Light emission of the warning indicator lamp 24 by the lamp unit 62 is stopped.

  The insect repellent selection switch 48 is actuated by pressing the insect repellent selection button 30 shown in FIG. 1, outputs an insect repellent sound signal from the oscillating unit 44, and outputs a repellent sound from the speaker 60 of the sound output unit 56, thereby operating the insect repellent function. . When the insect repellent function is selected by the insect repellent selection switch 48, the insect repellent indicator lamp 64 turns on the insect repellent indicator lamp 28 such as an LED shown in FIG.

  The voltage drop detection unit 68 monitors the power supply voltage, and when the detected voltage drops below a predetermined voltage, the control unit 38 causes the alarm indicator lamp 24 to blink at a predetermined cycle and from the speaker 60 to a predetermined cycle, for example 40 Sounds a warning sound every second.

  FIG. 4 is a flowchart showing a processing procedure of the embodiment of the fire alarm according to the present invention. First, when the power of the fire alarm 10 is turned on, processing is started in the control unit 38. In step S1, the light emitting element 52 of the smoke detecting unit 50 is driven to emit light at a predetermined cycle, for example, a 10 second cycle. The scattered light reflected by the smoke emitted from the light emitting element 52 is incident on the light receiving element 54 and outputs a received light signal to the fire determination unit 40.

  Subsequently, in step S2, human body detection information based on the output level of the infrared detection element of the human body detection unit 66 is output to the acoustic control unit 42 at a predetermined cycle, for example, a 10 second cycle.

  In step S3, parameters such as fire detection, human body detection, insect repellent function selection, and acoustic signal initialization are performed, and an insect repellent sound signal is output from the oscillating unit 44 to the acoustic output unit 56.

  The sound control unit 42 determines whether or not the insect repellent function is selected by the insect repellent selection switch 48 in step S4, and if the insect repellent function is not selected, the sound output unit 56 sends the smoke detector 50 in step S8. Insect-proof sound is output at a low level of sound pressure.

  If the insect repellent function is selected in step S4, the sound control unit 42 further determines in step S5 whether or not the human body detection unit 66 has detected the presence of a person. In step S7, an insecticidal sound is acoustically output from the acoustic output unit 56 with a high level of sound pressure effective as an insect repellent function.

  When detecting the presence of a person in step S5, the acoustic control unit 42 cuts the human audible frequency band from the insect-proof sound signal output from the oscillating unit 44 using, for example, a high-pass filter, and the acoustic output unit 56 in step S7. Insect-proof sound is output with a high level of sound pressure effective as an insect repellent function.

  Next, the fire determination unit 40 acquires the signal level of the received light signal received from the light receiving element 54 of the smoke detector 50 in step S9, and determines whether or not smoke has been detected based on the signal level in step S10. If it is determined that smoke is detected, that is, if a fire is detected, the process proceeds to step S11.

  The acoustic control unit 42 stops the insect-proof sound signal output from the oscillating unit 44 to the acoustic output unit 56 in step 11, and outputs an alarm sound signal from the oscillating unit 44 to the acoustic output unit 56 in step S 12. The sound output from the output unit 56 is switched from the insect-proof sound to the alarm sound.

  After the alarm sound is output from the speaker 60 of the sound output unit 56, the sound control unit 42 operates the alarm stop switch 36 in step S13 to determine whether or not an alarm stop instruction is issued, and the alarm stop instruction is issued. In this case, the process proceeds to step S14 to stop the alarm, and further, in step S15, it is determined whether or not there is a process stop instruction. If there is a process stop instruction, the process is stopped.

  When there is no warning stop instruction at step 13 and when there is no processing stop instruction at step 15, the process returns to step S9 to acquire the signal level of the received light signal received from the light receiving element 54 of the smoke detector 50, and step S10. In step S3, it is determined whether smoke has been detected based on the signal level. If no fire is detected, the process returns to step S3, and the output of the alarm sound is stopped by initializing the parameters.

  FIG. 5 is a block diagram showing a circuit configuration of a system having a heat detecting section for detecting heat due to a fire as another embodiment of the fire alarm according to the present invention. The fire alarm according to the present invention shown in FIG. The configuration is the same except that the smoke detector 50 of the embodiment is changed to a heat detector 70 having a thermal element 72, for example, a thermistor.

  FIG. 6 is a flowchart showing a processing procedure of another embodiment of the fire alarm according to the present invention shown in FIG.

  First, when the power of the fire alarm 10 is turned on, processing is started in the control unit 38, and in step S1, the thermal element 72 of the heat detection unit 70 is detected and driven at a predetermined cycle, for example, a cycle of 10 seconds, and a thermal signal is generated. Output to the fire determination unit 38.

  Subsequently, in step S2, human body detection information based on the output level of the infrared detection element of the human body detection unit 66 is output to the acoustic control unit 42 at a predetermined cycle, for example, a 10 second cycle.

  In step S3, parameters such as fire detection, human body detection, insect repellent function selection, and acoustic signal initialization are performed, and an insect repellent sound signal is output from the oscillating unit 44 to the acoustic output unit 56.

  In step S4, the sound control unit 42 determines whether or not the insect repellent function is selected by the insect repellent selection switch 48. If the insect repellent function is not selected, the sound control unit 42 does not emit an insect repellent sound.

  When the insect repellent function is selected in step S4, the sound control unit 42 further determines whether or not the human body detection unit 66 detects the presence of a person in step S5. In step S7, an insect-proof sound is acoustically output from the sound output unit 56 with an appropriate level of sound pressure effective as an insect repellent function.

  When detecting the presence of a person in step S5, the acoustic control unit 42 cuts the human audible frequency band from the insect-proof sound signal output from the oscillating unit 44 using, for example, a high-pass filter, and the acoustic output unit 56 in step S7. Sound output of insect repellent sound at an appropriate sound pressure level effective as an insect repellent function.

  Next, the fire determination unit 40 acquires the signal level of the thermal signal received from the thermal element 72 of the thermal detection unit 70 in step S8, determines whether or not heat has been detected based on the signal level in step S9, When the detection of heat is determined, that is, when a fire is detected, the process proceeds to step S10.

  The acoustic control unit 42 stops the insect-proof sound signal output from the oscillating unit 44 to the acoustic output unit 56 in step 10, and outputs an alarm sound signal from the oscillating unit 44 to the acoustic output unit 56 in step S 11. The sound output from the output unit 56 is switched from the insect-proof sound to the alarm sound.

  After the alarm sound is output from the speaker 60 of the sound output unit 56, the sound control unit 42 determines whether or not the alarm stop instruction is issued by operating the alarm stop switch 36 in step S12, and the alarm stop instruction is issued. In this case, the process proceeds to step S13 to stop the alarm, and further in step S14, it is determined whether or not there is a process stop instruction. If there is a process stop instruction, the process is stopped.

  When there is no warning stop instruction at step 12 and when there is no processing stop instruction at step 14, the process returns to step S8 to acquire the signal level of the thermal signal received from the thermal element 72 of the thermal detector 70, and step S9. Then, it is determined whether or not heat has been detected based on the signal level. If no fire is detected, the process returns to step S3, and the output of the alarm sound is stopped by initializing the parameters.

  In addition, since this embodiment is a battery drive, there exists a problem that the lifetime of a battery becomes short by always outputting an insect-proof sound. As a countermeasure, a power source for the sound output unit may be provided separately from the fire alarm function so that the life of the fire alarm is not affected.

The present invention is not limited to the above-described embodiment, includes appropriate modifications without impairing the object and advantages thereof, and is not limited by the numerical values shown in the above-described embodiment.

Explanatory drawing which showed the external appearance of embodiment of the fire alarm by this invention The block diagram which showed the circuit structure of embodiment of the fire alarm by this invention Explanatory drawing which shows the production method of the insect-proof sound signal which the oscillation part shown in FIG. 2 outputs The flowchart which shows the process sequence of embodiment of the fire alarm by this invention. The block diagram which showed the circuit structure of other embodiment of the fire alarm by this invention. The flowchart which shows the process sequence of other embodiment of the fire alarm by this invention.

Explanation of symbols

10: Fire alarm 12: Main body 14: Cover 16: Mounting part 18: Smoke inlet 20: Infrared transmission filter 22: Sound hole 24: Alarm indicator lamp 26: Alarm stop button 28: Insect repellent indicator lamp 30: Insect repellent selection button 32 : Battery 34: Noise absorption unit 36: Alarm stop switch 38: Control unit 40: Fire determination unit 42: Sound control unit 44: Oscillation unit 46: Memory 48: Insect repellent selection switch 50: Smoke detection unit 52: Light emitting element 54: Light reception Element 56: Sound output unit 58: Amplifying unit 60: Speaker 62: Alarm indicator lamp unit 64: Insect repellent indicator lamp unit 66: Human body detection unit 68: Voltage drop detection unit 70: Heat detection unit 72: Thermal element

Claims (6)

A fire determination section for outputting a fire detection signal by detecting a fire,
An oscillation unit that outputs an alarm sound signal in a frequency band used as a fire alarm sound and an insect-proof sound signal in a frequency band that insects dislike , and
And insect repellent selection switch for selecting the presence or absence of the insects except function,
The insect repellent to output a repellent sound signal from the oscillating unit when selecting the insect repellent function in selecting switch, and a sound control unit for outputting an alarm sound signal from the oscillator section upon detection of the fire by the fire determination portion ,
An acoustic output unit that amplifies the insect-proof sound signal or alarm sound signal output from the oscillation unit and outputs the sound; and
Equipped with a,
When the fire determination unit includes a smoke detection unit that receives the scattered light due to the smoke of light from the light emitting unit and outputs a smoke detection signal,
The acoustic control unit includes the smoke detector to output an insect repellent sound signal from the oscillation unit even when the insect repellent function is not selected by the insect repellent selection switch, and to output a sound output level output from the acoustic output unit. A fire alarm characterized by switching to a low level that propagates to a narrow area .
2. The fire alarm device according to claim 1, wherein the oscillating unit stores in advance a sound source data corresponding to each of the alarm sound signal and the insect-proof sound signal in a memory, and repeatedly reads the sound source data from the memory to perform DA conversion. And outputting the alarm sound signal or the insect-proof sound signal.
2. The fire alarm according to claim 1, wherein the sound control unit outputs the insect sound signal when the fire determination unit outputs the fire detection signal while outputting the insect sound signal from the oscillation unit. 3. A fire alarm device characterized by stopping the operation and switching to the output of the alarm sound signal.
2. The fire alarm according to claim 1, further comprising a human body detection unit that detects the presence of a person and outputs a human body detection signal, wherein the human body detection unit outputs the human body detection signal . fire alarm, characterized in that cutting the audible frequency band of human from the insect sound signal when the in.
In the fire alarm according to claim 1,
The oscillating unit sets in advance a plurality of kinds of insect sound signals having different frequency bands depending on the type of insects,
The sound control unit is characterized in that the plurality of types of insect repellent signals are randomly switched in time and output from the oscillation unit.
A smoke detector that receives scattered light from the light smoke from the light emitter at the light receiver and outputs a smoke detection signal;
A fire determination unit that detects a fire from the smoke detection signal and outputs a fire detection signal; and
An oscillation unit that outputs an alarm sound signal in a frequency band used as a fire alarm sound and an insect-proof sound signal in a frequency band that insects dislike, and
An insect repellent selection switch for selecting the insect repellent function;
An acoustic control unit that outputs an insect-proof sound signal from the oscillation unit regardless of selection of the insect repellent selection switch, and that outputs an alarm sound signal from the oscillation unit when the fire determination unit outputs the fire detection signal; ,
A sound output unit for amplifying the warning sound signal or the insect-proof sound signal and outputting sound;
The acoustic control unit comprises
When the insect repellent function is selected by the insect repellent selection switch, the sound output is output from the sound output unit at a high level effective as a repellent function,
Wherein the case of the non-selected insect repellent function by insect selection switch, fire alarm, characterized in Rukoto is outputted from the sound output unit at a low level to propagate the acoustic output in a narrow range including the smoke detection portion.

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