JPH06185778A - Range hood - Google Patents

Abstract

PURPOSE:To provide a range hood which can silence generated noise and radiate music, sound of a radio. CONSTITUTION:The noise of a sirrocco fan 3 or a discharge duct mounted at a rear of the fan 3 is propagated toward the vicinity of a cooking range 1. The propagated noise is sensed by a sensor microphone 5, subjected to inversion processing or adaptive signal processing by a signal processor amplifier 8 to direct an added sound, the added sound is radiated by a loudspeaker 6, and waves of the sound are interfered with those of the noise to be silenced. A voice signal of a sound source 10 input via an audio jack 7 is sent by the loudspeaker 6 via the amplifier 8 to allow a person near a hood body 2 to listen to music or broadcasting.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood used for kitchen ventilation.

[0002]

2. Description of the Related Art Generally, a range hood is installed in a kitchen and has a ventilation function for discharging steam on a stove to the outside.

[0003]

However, the above range hood has a problem that the wind noise of the fan and the rotation noise of the motor may become noise during ventilation. The present invention has been made in view of the above problems, and an object of the present invention is to reduce the noise propagated in the hood body, as well as music, radio sound, etc. It is to provide a range hood that can deliver.

In addition to the above object, the object of the invention as set forth in claim 2 is that the sound from the sound source device can be transmitted without special wiring even if the sound source device such as an audio device is located at a remote place. To provide a range hood.

[0005]

In order to achieve the above-mentioned object, the invention according to claim 1 is to detect the noise in the hood body, and to process the detected noise signal from this detecting means. A signal processing / amplifying means for amplifying the signal by a speaker and a speaker driven by an output signal from the signal processing / amplifying means, and a silent device for silencing the additional sound and noise from the speaker. It is provided with an audio jack connected to the signal input section of the signal processing / amplifying means.

According to a second aspect of the present invention, there is provided a receiving unit which is connected to an external audio signal output terminal of a sound source device such as an audio device and which corresponds to a transmitting unit which converts an output audio signal of the audio device into a radio signal and transmits the radio signal. The plug for outputting the received audio signal provided is connected to the audio jack.

[0007]

According to the first aspect of the present invention, the noise generated in the range hood can be silenced by the noise reduction device to reduce the noise, and the sound of the sound source device such as an external TV, radio, audio equipment, etc. By inputting the signal through the audio jack, the sound of the sound source device can be transmitted from the speaker, and a comfortable sound environment can be provided to a person who is doing kitchen work.

According to the second aspect of the invention, even if the sound source device is located away from the range hood, the audio signal of the sound source device can be taken in through the audio jack without special wiring.

[0009]

EXAMPLES The present invention will be described below with reference to examples. (Embodiment 1) FIG. 1 shows the entire configuration of Embodiment 1 of the present invention. The range hood of the present invention installed above the cooking range table 1 has a sirocco fan that controls the ventilation function in the hood body 2. 3 and a suction duct 4, and a sensor microphone 5 for detecting noise in the suction duct 4, a speaker 6 for generating an additional sound to the noise, and a noise signal detected by the sensor microphone 5. And a signal processing / amplifying circuit 8 for processing the audio signal input through the audio jack 7 and sending it from the speaker 6. ing. The audio jack 7 is externally provided on the outer surface of the hood body 2, and an audio signal output from the sound source device 10 by connecting a plug provided at the tip of the audio signal cord 11 to an external sound source device 10 such as a radio-cassette device. To enter.

Thus, in the range hood of this embodiment, noise generated from the sirocco fan 3 or an exhaust duct (not shown) attached to the rear part thereof propagates toward the vicinity of the cooking range table 1. The propagated noise is detected by the sensor microphone 5, the signal processing / amplifying circuit 8 performs inversion processing or adaptive signal processing to guide the additional sound, and the additional sound is transmitted from the speaker 6 to propagate the wave of the additional sound. Noise by interfering with the noise wave.

On the other hand, the voice signal input through the audio jack 7 is sent out from the speaker 6 through the signal processing / amplifying circuit 8 so that the person near the hood body 2 can hear the music or broadcast. FIG. 2 shows an example of the configuration of the signal processing / amplifying circuit 8. The signal processing / amplifying circuit 8 performs signal processing so that the sound once sent from the speaker 6 is not muted even if detected by the sensor microphone 5. It is like this. That is, the audio signal from the sound source device 10 is
Inputs are made to the correction circuit 12 and the addition circuit 13, respectively. The correction circuit 12 is composed of a delay circuit 14, an attenuation circuit 15, and an amplifier 16, and reproduces the transmission system of the system that is detected by the sensor microphone 5 and wraps around, and its output signal is output by the sensor microphone 5. It is input to the differential amplifier 17 together with the detected signal and the difference between the two is taken. This difference signal is added to the audio signal in the adder circuit 13, so that the signal corresponding to the audio signal fed back through the sensor microphone 5 of the audio signal is substantially canceled, and the audio signal from the sound source device 10 is canceled. The sound due to is not muted. Then, only the noise detected by the sensor microphone 5 is fed back and silenced.

(Second Embodiment) In the above embodiment, the sound source device 10 is used.
The audio signal of is directly connected to the audio jack 7 through the audio signal cord 11, but in the present embodiment, as shown in FIG. 3, a transmission unit 20 for converting the audio signal into an infrared signal and transmitting the infrared signal, Using the reception unit 21 that receives the transmitted infrared signal and demodulates it into an audio signal, even if the sound source device 10 is at a distant position, input the sound source device to the audio jack 7 without special wiring. It was made possible.

The transmission unit 20 of the embodiment shown in FIG. 3 is provided with a plug 23 for connecting to the sound source device 10, in the example shown, an earphone jack 22 of a TV, and this plug 23 is an earphone jack 22 which is an external audio signal output terminal. The audio signal of the sound source device 10 can be captured by connecting to the. And the transmission unit 20
4A is amplified by the amplifier 24 shown in FIG. 4A, and then converted into a signal for driving the optical signal transmitter 26 including an infrared light emitting diode by the electric / optical conversion circuit 25, and the converted signal is used. The optical signal transmitter 26 is driven to transmit an infrared signal.

On the other hand, the receiving unit 21 receives an infrared signal transmitted from the transmitting unit 20 as shown in FIG. 4 (b), and an optical signal receiving section 27 and a signal received by the optical signal receiving section 27 as a voice signal. Optical-electrical conversion circuit 2 for demodulation
8, an amplifier 29 that amplifies the demodulated audio signal, and an audio jack 7 that outputs the audio signal output from the amplifier 29.
And a plug 30 for inputting into the.

Thus, in this embodiment, the sound signal of the sound source device 10 located at a position distant from the hood body 1 is once converted into an infrared signal by the transmission unit 20, and the reception unit 21 is arranged near the hood body 1. Send to. Then, the receiving unit 21 receives the infrared signal, demodulates the sound signal from the received light signal, and sends it to the audio jack 7. Since the processing of the audio signal after being input to the audio jack 7 is the same as that of the first embodiment, the description of the operation is omitted.

Although the infrared signal is used as the medium of the wireless signal in the second embodiment, radio waves may of course be used. Further, in the first and second embodiments, when active muffling is performed, the sound signal is prohibited by the sound signal of the sound source device 10, or conversely, the sound signal is amplified at the same time so that the sound signal is transmitted while the noise is suppressed. It goes without saying that it is possible to correspond.

[0017]

According to the first aspect of the present invention, the detecting means for detecting the noise in the hood body, the signal processing and amplifying means for processing and amplifying the detected noise signal from the detecting means, and the signal processing and amplifying means. It is composed of a speaker driven by an output signal from the means, and is provided with a silencer for silencing the sound from the speaker by interfering with the noise, so that the noise generated in the range hood can be silenced. Since it has an audio jack connected to the signal input section of the signal processing / amplifying means, it is possible to input the audio signal of a sound source device such as an external TV, radio, or audio device through the audio jack. Due to
The sound of the sound source device can be transmitted from the speaker, and there is an effect that a comfortable sound environment can be provided to a person who is doing kitchen work.

The invention according to claim 2 is connected to an external audio signal output terminal of a sound source device such as an audio device, and corresponds to a receiving unit corresponding to a transmitting unit for converting an output audio signal of the audio device into a radio signal and transmitting the radio signal. Since the plug for receiving audio signal output provided in is connected to the audio jack, even if the sound source device is located away from the range hood, the audio signal of the sound source device is taken in through the audio jack without special wiring. The effect is that you can.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a signal processing amplifier circuit used in the above.

FIG. 3 is a schematic configuration diagram of a second embodiment of the present invention.

FIG. 4A is a configuration diagram of a transmission unit used in the above. (B) is a block diagram of a receiving unit used in the above.

[Explanation of symbols]

 1 Cooking range base 2 Hood main body 3 Sirocco fan 4 Exhaust duct 5 Sensor microphone 6 Speaker 7 Audio jack 8 Signal processing amplifier circuit 9 Silent device 10 Sound source device 11 Voice signal cord

Claims (2)

[Claims] 1. A detection means for detecting noise in the hood body, a signal processing and amplification means for signal processing and amplifying a detected noise signal from the detection means, and an output signal from the signal processing and amplification means. And a sound silencer for silencing the additional sound and noise from the speaker, and an audio jack connected to the signal input section of the signal processing and amplifying means. Range hood to do. 2. A reception audio signal provided in a reception unit corresponding to a transmission unit which is connected to an external audio signal output terminal of a sound source device such as an audio device and converts the output audio signal of the audio device into a radio signal and transmits the radio signal. The range hood according to claim 1, wherein an output plug is connected to the audio jack.