JPH0473534A - Ventilation register opening and closing device - Google Patents

Abstract

PURPOSE:To eliminate invasion of sound having a special frequency into a room by closing a damper of a ventilation register when a special acoustic sound removed from an acoustic signal from a sound collecting microphone provided out of a building is a predetermined level or higher. CONSTITUTION:A ventilation register 1 mounted in a communication hole 5 formed at the outer wall 3 of a building has a damper 7, and a voice signal collected by a sound collecting microphone 13 provided near the register 1 is input to a controller 15. The controller 15 drives a motor 9 so as to open or close the damper 7 of the register 1 by the input of a command 17 by the operation of manual switch, removes a special sound from the voice signal collected by the microphone 13 if the register 1 is manually opened at the damper 7, and rotatably drives the motor 9 in a direction of closing the damper 7 when it is at a predetermined level or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ventilation register opening/closing device that can open and close a damper of a ventilation register in accordance with a specific sound level.

[Conventional technology]

As is well known, ventilation registers are attached to walls that separate the inside and outside of buildings, for example, and are used to ventilate indoor air.

This ventilation register l is connected to the building 2 as shown in FIG.
It is attached to a hole 6 that communicates with the outside provided in a predetermined part of the outer wall 4 of the damper, and when the damper is opened, the indoor and outdoor areas are communicated and the indoor air can be ventilated, and the damper is closed. This allows the indoor and outdoor areas to be shut off. In addition,
Reference numeral 8 is a window.

Such a ventilation register l allows the air in the room to be ventilated.

[Problem to be solved by the invention]

However, since the above-mentioned ventilation register is often attached to a part of the building's outer wall that communicates with the outside, when the indoor and outdoor areas are communicated in a ventilated state, external noise will enter the room. In particular, it is undesirable for the indoor environment for sounds of specific frequencies to enter the room.

The present invention solves the drawbacks of the conventional devices described above, and provides a ventilation register opening/closing device that prevents the sound of a specific frequency from entering the room when the sound of a specific frequency outdoors is above a certain level. purpose.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a sound collecting microphone provided outside a building, a ventilation resistor that is attached to a communication hole provided in the outer wall of the building and whose damper opens and closes in response to a drive signal, and a sound collecting microphone provided from the sound collecting microphone. The device is equipped with a control device that extracts a specific sound from the signal and outputs a drive signal to close the damper of the ventilation register when the sound is above a certain level.

[Effect]

The present invention collects sounds from outside the building using a microphone, extracts a specific sound from the collected sounds, and closes the damper of the ventilation register when the sound exceeds a certain level.

Thereby, it is possible to prevent sound from a specific sound source from entering the room.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a diagram showing the overall configuration of an embodiment of a ventilation register opening/closing device according to the present invention.

In FIG. 1, a ventilation register l is attached to a communication hole 5 provided in an outer wall 3 of a building. The ventilation register 1 is equipped with a damper 7, and the damper 7 is opened and closed.

The damper 7 of the ventilation register I is opened and closed by an opening/closing machine ff111 driven by a motor 9 that can rotate forward and backward. This opening/closing mechanism 11 outputs a status signal when the damper 7 is fully opened or fully opened.

Further, a sound collection microphone 13 is provided near the ventilation register 1 outside the building, and the audio signal collected by the sound collection microphone 13 is input to the control device 15.

The control device 15 includes the opening/closing mechanism! The status signal from (2) is also input. The control device I5 drives the motor 9 to manually open and close the damper 7 of the ventilation register 1 according to an instruction 17 by operating a manual switch described later, and when the damper 7 of the ventilation register 1 is manually opened and closed, It is configured such that a specific sound is extracted from the audio signal collected by the sound collection microphone I3, and when the sound is above a certain level, the motor 9 can be driven to rotate in the direction in which the damper 7 is closed.

FIG. 2 is a diagram showing an example of the principle structure of a damper opening/closing mechanism.

In FIG. 2, the rotation shaft of the motor 9 can rotate the feed screw 19 of the opening/closing mechanism 11. A ball nut 21 is screwed onto this feed screw 19, and this ball nut 21
The damper 7 is opened and closed via the mechanism 23 by moving from side to side in the drawing as the feed screw I9 rotates.

Further, a full open detection switch 25 is provided at one end of the feed screw I9, and a full open detection switch 27 is provided at the other end, and the detection signal thereof is output as a status signal.

FIG. 3 is a diagram showing a sequence circuit of the control device of the same embodiment.

In FIG. 3, reference numeral 31 is an operation switch that gives an instruction to open the damper 7, and the operation switch 3I is a fully open detection switch 27. ! The relay coil RLO is connected between the operating power supplies as a series circuit by the J-relay coil RLO, and the relay tff point rloI is connected in parallel to the operating switch 31, and when the operating switch 31 is pressed and the fully open detection switch 27 is closed, the relay coil RLO is automatically activated. It becomes an excited state.

Further, the relay coil PLO is in a non-excited state when the fully open detection switch 27 is open. This causes the relay contact “I0
When 2 to r104 are closed, the motor 9 rotates forward, and the relay F
HC! When i, r l 02 - r l 04 are opened, the motor 9 stops. As a result, the damper 7 is fully opened.

Further, reference numeral 32 is an operation switch that gives an instruction to open the damper 7, and the operation switch 32 is connected between the operation power source as a series circuit by the fully open detection switch 25 and the relay coil RLC, and the operation switch 32 is connected to the operation power source by the relay coil RLC. Contacts r l C1 are connected in parallel, and when the operating switch 32 is pressed, the relay coil R'L C enters a self-exciting state on the condition that the fully closed detection switch 25 is closed. When is open, it becomes de-energized.

As a result, when the relay contacts rIC2 to rIC4 are closed, the motor 9 rotates in the reverse direction, and the relay contacts rIC2 to rIC4 are closed.
~rI C4 opens (and motor 9 stops. As a result, damper 7 becomes fully closed.

A relay contact r1m controlled by a signal from the signal processing circuit 35 is connected in series to the relay coil RLc.

This signal processing circuit 35 opens the relay contact r1m when a specific sound in the audio signal collected by the sound collection microphone 13 is above a certain level under the condition that the damper 7 is open (the fully open detection switch 27 is open). Close for a certain period of time (T).

Similarly, the signal processing circuit 35 is connected to the relay coil RLO.
A relay contact rln controlled by a signal from the terminal is connected in series. This signal processing circuit 35 has a relay contact r1m
is closed, when a specific sound in the audio signal collected by the sound collection microphone 13 is above a certain level and falls below a certain level, the relay Fff point rl is activated.
n is closed for a certain period of time (T).

As a result, the damper 7 automatically closes when a specific sound is collected by the sound collection microphone 13 and exceeds a certain level.
When this specific sound falls to a certain level, the damper 7 will automatically open.

FIG. 4 is a diagram showing an example of the configuration of a signal processing circuit used in the same embodiment.

In FIG. 4, the audio signal collected by the sound collection microphone 13 is amplified by an amplifier circuit 351 and supplied to bandpass filters 352, 353, and 354.

The bandpass filters 352, 353, and 354 can extract only the audio signal of a specific frequency from the audio signal. Here, the band pass filter 352 has, for example, 10
For example, the band pass filter 353 receives an audio signal of 0 to 500 (Hz), and the band pass filter 353 receives an audio signal of 500 to 1000 (Hz), for example.
It is assumed that audio signals of 00()Iz) can be passed through.

Output signals from the bandpass filters 352, 353, and 354 are selected by a selection switch 355a, integrated by an integrating circuit 356, and supplied to a comparator 357.

On the other hand, a reference voltage is applied to the comparator 357 and compared with the output from the integrating circuit 356.

The reference voltage is a fixed resistor RI connected to the reference power supply 358.
-R3 and a circuit network 35 consisting of variable resistors VRI to VR3
9 is selected and applied by the selection switch 355b. Variable resistors VRI-VR3 of network 359 are provided for manual adjustment.

The output of the comparator 357 is supplied to an ant circuit 360 and a nand circuit 361.

The AND circuit 360 inverts the D flip-flop 362 on the condition that the fully open detection switch 27 is open. The output of the D flip-flop 362 passes through a time limit circuit 363 to turn on a transistor 364 to excite the relay coil RLm, but the transistor 364 is turned off by the time limit circuit 363 after a certain period of time (T) has elapsed, and the relay coil RLm is turned off.
de-energize.

The NAND circuit 361 inverts the D flip-flop 366 on the condition that the D flip-flop 362 is inverted.

The output of the D flip-flop 366 turns on the transistor 368 via the timer circuit 367 and connects the relay coil RL.
The transistor 368 is turned off by the timer circuit 367 after a certain period of time (T) has elapsed.

It is assumed that a clock (not shown) is input to the D flip-flops 352 and 366.

The operation of the embodiment configured as described above will be explained below with reference to FIGS. 1 to 6.

FIG. 5 is a timing chart for explaining the operation of the embodiment of the present invention, in which the horizontal axis shows time and the vertical axis shows the operation of each part. FIG. 6 is an explanatory diagram showing the automatic opening/closing operation in the present invention.

First, when the operation switch 31 is pressed (time to
), the relay coil RLO enters a self-exciting state on the condition that the fully open detection switch 27 (B contact) is closed (time tO in Figure 5).
~).

As a result, relay contacts r101-r104 close, causing the motor 9 to rotate forward. Then, the feed screw 19 rotates, moves the ball nut 2I to the right side in the figure, and opens the damper 7. When the pole nut 21 comes into contact with the full open detection switch 27, the full open detection switch 27 opens (at time t1).
), the relay coil RLO becomes de-energized, and the relay contacts a r + o+ to r l 04 open, so the motor 9 stops and the damper 7 remains fully open.

Here, the audio signal collected by the sound collection microphone 13 is input to the signal processing circuit 35 (Step 1 in Fig. 6).
reference).

The signal processing circuit 35 includes selection switches 355a, 355
For example, if b selects the band-pass filter 352, the collected audio signal is amplified by the amplifier circuit 351, and then the band-pass filter 352 amplifies the signal from 100 to 500.
(Hz) audio signal only (Figure 6 Step 2)
, 3, and time t2~).

In the signal processing circuit 35 , the output signal from the bandpass filter 352 is integrated by an integrating circuit 356 and supplied to a comparator 357 . On the other hand, the comparator 357 has
Base 4 voltage is given (see step 4 in Figure 6),
It is compared with the output from the integrating circuit 356 (see step 5 in FIG. 6).

The reference voltage is connected to a circuitry 359 connected to a reference power source 358.
A voltage formed by a fixed resistor R1 and a variable resistor VRI is applied. Here, by manually adjusting the variable resistor VRI of the circuit network 359, the reference voltage can be varied in various ways.

The comparator 357 controls II O when the specific audio signal from the bandpass filter 352 is greater than the reference voltage.
It changes from 11 to 6'1'.

The output of this comparator 357 is the fully open detection switch f2.
7 is open, it is supplied to a D flip-flop 362 through an AND circuit 360.

The D flip-flop 362 holds II II II of the comparator 357 using a clock (not shown) (time t3). Then, the time limit circuit 363 operates and remains on for a certain period of time (T) (times t3 to t5).

As a result, the relay contact + r I m is turned on and the relay coil RLC is brought into an excited state (time 4).

This closes the relay contacts r l C1 to r l C4, causing the motor 9 to rotate in the reverse direction.

Then, the feed screw 19 rotates in the opposite direction, moves the pole nut 21 to the left in the figure, and closes the damper 7.

When the ball neck 1-21 comes into contact with the fully open detection switch 25, the fully closed detection switch 25 opens (time t6), so the relay coil RLC becomes de-energized and the relay contact rlc
Since I-rlc4 opens, the motor 9 stops and the damper 7
remains fully open.

As a result, the damper 7 closes when the specific audio signal is at a certain level, so that specific sounds can be prevented from entering the room.

Next, when the audio signal of the specific frequency decreases and becomes lower than the reference voltage, the comparator 357 changes from ■“ to “0”.
Changes to

Then, the NAND circuit 361 becomes the D flip-flop 362
D flip-flop 366 on the condition that is inverted.
is reversed (time t7).

The output of the D flip-flop 366 turns on the transistor 368 via the timer circuit 367 and connects the relay coil RL.
n is brought into an excited state (time t7), but transistor 36
8 is turned off by the time limit circuit 367 after a certain period of time (T) has elapsed (time 11t9).

Then, the relay coil PLO activates the fully open detection switch 27.
is closed, the motor 9 enters an excited state (time L8), and when the relay contact rlol-r104 closes, the motor 9 rotates forward (time t8).

Then, the feed screw 19 rotates forward, moving the pole nut 21 to the right in the figure and opening the damper 7.

When the pole nut 21 comes into contact with the full open detection switch 27, the full open detection switch 27 opens (because (at A11tlO),
Relay coil RLO becomes de-energized and relay contact r
Since loI~r104 opens, the motor 9 stops and the damper 7 remains fully open. This allows continued indoor ventilation.

In this way, the embodiment of the present invention closes the damper 7 to prevent sound from entering the room when a specific acoustic signal is at a certain level, and closes the damper 7 when the acoustic signal falls below a certain level. can be opened to maintain ventilation.

Further, in the embodiment of the present invention, an arbitrary reference voltage can be set by the circuit network 359, and the bandpass filter 352, 353
．． Since it is possible to pass an acoustic signal of any frequency using the H.354, it is possible to correspond to a wide range of target sound source types and sound source levels.

Furthermore, since the embodiment of the present invention uses a reference voltage for a specific sound source, there is an advantage that erroneous operations are less likely to occur for sounds other than the target sound source.

Note that in the above embodiment, the bandpass filter 352.3
Although the explanation has been given using an example in which three filters are used, the number of filters may be increased to provide a larger number of divided bands, or a combination of bypass filters and low-pass filters may be used. At this time, it is necessary to configure the circuit network 359 so that the reference voltage can be set according to the number of filters, and to select one of them.

〔Effect of the invention〕

As explained above, according to the present invention, the damper is closed when a specific acoustic signal outside the room is at a certain level, so that the specific sound does not enter the room.

Further, since the present invention operates only in response to a specific sound, there is also an advantage that malfunctions caused by other sounds are less likely to occur.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the overall configuration of an embodiment of the present invention, FIG. 2 is a fundamental configuration diagram showing a damper opening/closing mechanism, FIG. 3 is a control sequence circuit diagram of the above embodiment, and FIG. A circuit diagram showing the signal processing circuit of the same embodiment, FIG. 5 is a time chart for explaining the operation of the same embodiment, FIG. 6 is a schematic explanatory diagram of automatic operation of the same embodiment, and FIG. 7 is a ventilation register. The figure shows the installation state. 1... Ventilation register 7... Damper 13... Sound collection microphone, 15... Control device. Figure 2 23 ＼ Figure 3 Figure 5

Claims (1)

[Scope of Claims] 1) A sound collecting microphone provided on the outside of the building, a ventilation register that is attached to a communication hole provided in the outer wall of the building and whose damper opens and closes in response to a drive signal, and an acoustic signal from the sound collecting microphone. A ventilation register opening/closing device comprising: a control device that extracts a specific sound from the source and outputs a drive signal to close a damper of the ventilation register when the sound is above a certain level;