JP2006331468A - Audio device, control method, control program and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio device capable of preventing a failure based on excessive operation of a cooling fan by controlling while suppressing the operation of the cooling fan to the necessary minimum. <P>SOLUTION: The audio device that is provided with the cooling fan and has a plurality of operation modes is provided with a mode determining means for determining the present operation mode, and a driving control means for driving the cooling fan when the operation mode is a prescribed operation mode. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooling fan for cooling an audio device, a control method thereof, a control program, and a recording medium.

  Conventionally, a general operation method of a cooling fan provided particularly in an in-vehicle audio apparatus is that a user operates a vehicle key to an ACC (accessory) position and outputs from the vehicle when ACC power is supplied. The cooling fan is operated in synchronization with the ACC signal. According to this operation method, when the ACC power is supplied, the cooling fan is operated even if the power of the audio apparatus is off.

There is also an operation method in which a cooling fan is controlled by an audio control CPU (Central Processing Unit) which is a control unit of the audio apparatus, and the cooling fan is operated only when the power of the audio apparatus is on.
According to these operation methods, in any operation method, the cooling fan is always operated while the audio device is activated. Excessive cooling fan operation not only increases power consumption but also shortens the component life of the cooling fan itself, and may cause dust and dirt to enter the audio device and adhere to the CD or MD pickup. It is done.
Japanese Utility Model Publication No. 5-38985

  In order to solve this problem, by providing a temperature sensor that detects the internal temperature of the audio device in the past, the cooling fan is operated only when the internal temperature exceeds a certain temperature, so that the internal temperature falls below a certain temperature. In such a case, a cooling fan operation method for stopping the cooling fan has been proposed (see, for example, Patent Document 1). According to this, the cooling fan can be operated only when the internal temperature rises, but it is necessary to provide a temperature sensor to detect the internal temperature, which is expensive.

  In addition, in the radio mode that outputs radio sound, the cooling fan is operated despite the fact that the amount of heat generation is not large, so the noise generated from the motor that drives the cooling fan has an adverse effect on the radio sound, It may be difficult to hear radio sound.

  The present invention has been made in view of the above-described circumstances, and an audio apparatus capable of preventing problems based on excessive cooling fan operation by controlling the operation of the cooling fan to the minimum necessary level. The purpose is to provide.

  According to the present invention, in an audio apparatus including a cooling fan and having a plurality of operation modes, mode determination means for determining a current operation mode and driving the cooling fan when the operation mode is a predetermined operation mode Drive control means.

  In this case, the operation mode may include a motor driving operation for driving the medium. Volume determining means for determining the current volume may be provided, and the cooling fan may be driven when the predetermined operation mode and a predetermined reference volume or higher. A predetermined reference volume for driving the cooling fan may be set for each operation mode. An operation mode for driving the cooling fan may be set for each volume range. The operation control means may stop the operation of the cooling fan after a predetermined time set in advance for each operation mode has elapsed when an instruction to stop the operation of the audio device is given. The operation mode may include a radio mode.

  According to another aspect of the present invention, there is provided a control method for controlling an audio apparatus including a cooling fan and having a plurality of operation modes, in a mode determination process for determining a current operation mode, and when the operation mode is a predetermined operation mode. And a drive control process for driving the cooling fan.

  According to the present invention, in a control program for controlling an audio apparatus having a plurality of operation modes by a computer, the current operation mode is determined, and the operation mode is a predetermined operation mode. The drive control for driving the cooling fan is performed.

  According to the present invention, it is possible to prevent problems caused by excessive cooling fan operation by controlling the cooling fan operation to a minimum necessary level.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(1) First Embodiment FIG. 1 is a block diagram showing an audio apparatus 100 according to this embodiment.
The audio device 100 is an in-vehicle audio device mounted on an automobile or the like, and includes an AM / FM tuner 1, a CD player 2, a semiconductor audio 3, an MD player 4, a volume adjustment volume (hereinafter referred to as volume) 5, and a mode selection switch. 6, a DSP (Digital Signal Processor) 7, an audio control CPU (hereinafter referred to as CPU) 8, a cooling fan 9, a power amplifier 10, a vehicle speaker 11, a vehicle interface 12, and a display unit 13.

The AM / FM tuner 1 is a radio receiver, receives radio broadcast waves, acquires radio audio signals from the received radio broadcast waves, and outputs them to the DSP 7.
The CD player 2 is a CD playback device and outputs an audio signal read from the CD to the DSP 7.
The semiconductor audio 3 is a semiconductor memory reader, acquires an audio signal from a non-volatile semiconductor memory such as a flash memory, and outputs it to the DSP 7.
The MD player 4 is an MD playback device and outputs an audio signal read from the MD to the DSP 7.
The input device 14 is an operation unit for a user to give an operation instruction to the CPU 8, and includes a volume 5 and a mode selection switch 6.
The volume 5 is an operation unit for the user to adjust the volume of the audio device 100, and the volume can be adjusted in 32 steps (0: min./silence, 31: max./maximum volume) from 0 to 31. it can.

  The mode selection switch 6 is an operation unit for the user to select an operation mode. In this embodiment, the CD player 2 plays a CD (operation mode: 01), the MD player 4 plays an MD mode (operation mode: 02), and the AM / FM tuner 1 outputs radio sound. The user has four operation modes (01 to 04): a radio mode (operation mode: 03) and a semiconductor audio mode (operation mode: 04) for reproducing sound stored in the semiconductor memory by the semiconductor audio 3. One of these can be selected by operating the mode selection switch 6.

  The DSP 7 is a volume control unit for the sound that the audio apparatus 100 emits to the outside. The sound output from the AM / FM tuner 1, the CD player 2, the semiconductor audio 3, and the MD player 4 in accordance with the volume output instruction from the CPU 8. The volume of the signal is adjusted, and the adjusted audio signal is output to the power amplifier 10.

  The CPU 8 is a computer that controls the entire audio device 100 and detects an operation instruction output from the input device 14 and an ACC signal output from the vehicle interface 12, and this ACC signal indicates the start of supply of ACC power. In this case, the operation control of the cooling fan 9, the display control of the display unit 13, the volume control of the DSP 7, the power control of the AM / FM tuner 1, the CD player 2, the semiconductor audio 3, and the MD player 4 are performed. Thus, the CPU 8 can function as a mode determination unit that determines the operation mode, a drive control unit that controls driving of the cooling fan 9, and a volume determination unit that determines the volume.

The cooling fan 9 is a blower for cooling the inside of the audio device 100 and operates according to an operation instruction from the CPU 8.
The power amplifier 10 is an amplifier, amplifies the audio signal output after the volume is adjusted by the DSP 7, and outputs the amplified audio signal to the vehicle speaker 11.

The vehicle speaker 11 is an output device disposed in the vehicle, and outputs the sound signal amplified and output by the power amplifier 10 to the outside as a sound wave.
The vehicle interface 12 is a connection interface when the audio device 100 is mounted on a vehicle, and is a device that mediates exchange of data between the vehicle side and the audio device 100. The ACC signal is input to the CPU 8 of the audio apparatus 100 from the vehicle side via the vehicle interface 12.
The display unit 13 displays various information such as the operating status of the audio device 100 under the control of the CPU 8. For example, the display unit 13 includes a flat panel such as a liquid crystal panel or an organic EL panel, and a drive circuit that drives the flat panel. I have.

FIG. 2 shows a flowchart of operation control of the cooling fan 9 by the audio device 100.
The CPU 8 first determines whether or not the ACC switch (vehicle key) of the vehicle is on based on the ACC signal output from the vehicle interface 12 (step S1).

  In step S1, if the CPU 8 determines that the ACC switch of the vehicle is not on (step S1: NO), the user operates the ACC switch to the ACC position, and repeats the process of step S1 until the ACC switch is turned on.

  On the other hand, when the CPU 8 determines in step S1 that the ACC switch of the vehicle is on (step S1: YES), the CPU 8 determines whether or not the audio device 100 is powered on (step S2).

  If the CPU 8 determines in step S2 that the power of the audio device 100 is not on (step S2: NO), the CPU 8 performs control so as to stop the operation of the cooling fan 9, and the cooling fan 9 is stopped or stopped. The state is maintained (step S4).

  On the other hand, when the CPU 8 determines in step S2 that the power of the audio apparatus 100 is on (step S2: YES), the value of the output volume of the audio apparatus 100 adjusted by the volume 5 is set to a preset reference output. It is determined whether the value is equal to or higher than the volume (step S3). At this time, for example, when the value of the reference output volume is 10 out of 0 to 31 and the value of the adjusted output volume is 17, 17 is a value of 10 or more. Therefore, in the determination of step S3 , YES is determined. However, when the adjusted output volume value is a value smaller than 10 such as 9, it is determined NO in the determination of step S3.

  In step S3, if the CPU 8 determines that the value of the output volume of the audio device 100 adjusted by the volume 5 is not equal to or greater than the reference output volume (step S3: NO), the amount of heat generated by the power amplifier 10 or the like is too large. Therefore, control is performed to stop the operation of the cooling fan 9, and the cooling fan 9 is stopped or maintained (step S6).

  On the other hand, when the CPU 8 determines in step S3 that the value of the output volume of the audio device 100 adjusted by the volume 5 is equal to or higher than the reference output volume (step S3: YES), the mode selection switch 6 sets the value. It is determined whether the selected operation mode is a preset operation mode (step S5). Here, in the present embodiment, the CD mode and the MD mode are set as operation modes set in advance.

  In step S5, when the CPU 8 determines that the operation mode set by the mode selection switch 6 is not a preset operation mode (step S5: NO), the operation mode is accompanied by heat generation by the motor driving the CD or MD. Therefore, control is performed to stop the operation of the cooling fan 9, and the cooling fan 9 is stopped or maintained (step S8).

  On the other hand, in step S5, when the CPU 8 determines that the operation mode set by the mode selection switch 6 is a preset operation mode (step S5: YES), the CPU 8 performs control to operate the cooling fan 9 and performs cooling. The fan 9 operates or the operation state is maintained (step S7).

According to this embodiment, the cooling fan 9 can be stopped when the output volume of the audio apparatus 100 is smaller than the reference output volume value and the amount of heat generated by the power amplifier 10 is small. Thereby, when the output volume is low, the operation sound of the cooling fan 9 cannot be heard.
Further, when the output volume is equal to or higher than the reference output volume value, the cooling fan 9 is stopped in the radio mode, the semiconductor audio mode, or the like, which is an operation mode not accompanied by heat generation by the motor driving the CD or MD. it can. Accordingly, the cooling fan 9 is not operated, so that heat generation is not promoted. In the radio mode or the like, there is no adverse effect due to noise generated from the motor that drives the cooling fan 9.
Further, by controlling unnecessary operations of the cooling fan 9, the power consumption is reduced, the life of the cooling fan is extended, and dust and dust that cause troubles such as dirtying the pickup of the CD player and MD player are caused. Contamination is reduced.

(2) Second Embodiment The configuration of the audio device 100 in the second embodiment is the same as that in the first embodiment, but the operation control of the cooling fan 9 is different. In the second embodiment, the operation mode is In response to this, it is possible to set the output sound volume value for operating the cooling fan 9. For example, the value of the output volume for operating the cooling fan 9 is 10 or more in the CD mode, 12 or more in the MD mode, 20 or more in the radio mode, and 22 in the semiconductor audio mode, respectively. It can be set in advance as described above.

FIG. 3 shows a flowchart of operation control of the cooling fan 9 by the audio device 100.
First, the CPU 8 determines whether or not the ACC switch of the vehicle is on based on the ACC signal output from the vehicle interface 12 (step S11).

  In step S11, if the CPU 8 determines that the ACC switch of the vehicle is not on (step S11: NO), the user operates the ACC switch to the ACC position, and repeats the process of step S11 until the ACC switch is turned on.

  On the other hand, when determining in step S11 that the ACC switch of the vehicle is on (step S11: YES), the CPU 8 determines whether or not the power of the audio device 100 is on (step S12).

  In step S12, when the CPU 8 determines that the power of the audio device 100 is not on (step S12: NO), the CPU 8 performs control to stop the operation of the cooling fan 9, and the cooling fan 9 enters a stopped state (step S14). .

  On the other hand, when the CPU 8 determines in step S12 that the power of the audio apparatus 100 is on (step S12: YES), the CPU 8 determines whether or not the operation mode is the radio mode (step S13).

  In step S13, when the CPU 8 determines that the operation mode is the radio mode (step S13: YES), the value of the output volume of the audio device 100 adjusted by the volume 5 is a value equal to or higher than a preset reference output volume. It is determined whether or not (step S15).

  In step S15, if the CPU 8 determines that the value of the output volume of the audio device 100 adjusted by the volume 5 is not a value equal to or higher than the reference output volume (step S15: NO), the amount of heat generated by the power amplifier 10 or the like is too large. Therefore, the control is performed to stop the operation of the cooling fan 9, and the cooling fan 9 is stopped or maintained in the stopped state (step S17).

  On the other hand, when the CPU 8 determines in step S15 that the value of the output volume of the audio device 100 adjusted by the volume 5 is equal to or greater than the reference output volume (step S15: YES), the motor that drives the CD and MD. Therefore, the cooling fan 9 is controlled to operate and the cooling fan 9 is operated or the operation state is maintained (step S16).

  In step S13, when determining that the operation mode is not the radio mode (step S13: NO), the CPU 8 determines whether or not the operation mode is the CD mode (step S18).

  If the CPU 8 determines in step S18 that the operation mode is the CD mode (step S18: YES), whether or not the value of the output volume of the audio device 100 adjusted by the volume 5 is a value equal to or higher than the reference output volume. Is determined (step S19).

  In step S19, when the CPU 8 determines that the value of the output volume of the audio device 100 adjusted by the volume 5 is not a value equal to or higher than the reference output volume (step S19: NO), the CPU 8 performs control to stop the operation of the cooling fan 9. Then, the cooling fan 9 is stopped or maintained in a stopped state (step S21).

  On the other hand, if the CPU 8 determines in step S19 that the value of the output volume of the audio device 100 adjusted by the volume 5 is equal to or greater than the reference output volume (step S19: YES), the CPU 8 should operate the cooling fan 9. The cooling fan 9 is operated or the operating state is maintained (step S20).

  In step S18, when determining that the operation mode is not the CD mode (step S18: NO), the CPU 8 determines whether or not the operation mode is the MD mode (step S22).

  If the CPU 8 determines in step S22 that the operation mode is the MD mode (step S22: YES), whether or not the value of the output volume of the audio device 100 adjusted by the volume 5 is a value equal to or higher than the reference output volume. Is determined (step S23).

  In step S23, when the CPU 8 determines that the value of the output volume of the audio device 100 adjusted by the volume 5 is not equal to or higher than the reference output volume (step S23: NO), the CPU 8 performs control to stop the operation of the cooling fan 9. Then, the cooling fan 9 is stopped or maintained in a stopped state (step S25).

  On the other hand, when the CPU 8 determines in step S23 that the value of the output volume of the audio device 100 adjusted by the volume 5 is a value equal to or higher than the reference output volume (step S23: YES), the CPU 8 should operate the cooling fan 9. The cooling fan 9 is operated or the operating state is maintained (step S24).

  In step S22, when the CPU 8 determines that the operation mode is not the MD mode (step S22: NO), the CPU 8 determines that the operation mode is the semiconductor audio mode, and the value of the output volume of the audio device 100 adjusted by the volume 5 is determined. It is then determined whether or not the value is equal to or higher than the reference output volume (step S26).

  In step S26, if the CPU 8 determines that the value of the output volume of the audio device 100 adjusted by the volume 5 is not equal to or greater than the reference output volume (step S26: NO), the CPU 8 performs control to stop the operation of the cooling fan 9. Then, the cooling fan 9 is stopped or maintained in the stopped state (step S28).

  On the other hand, when the CPU 8 determines in step S26 that the value of the output volume of the audio device 100 adjusted by the volume 5 is a value equal to or higher than the reference output volume (step S26: YES), the CPU 8 should operate the cooling fan 9. The cooling fan 9 is operated or the operating state is maintained (step S27).

  According to this embodiment, it is possible to set the reference output volume value for each operation mode. Thus, for example, when the calorific value for each operation mode is in the descending order of CD mode, MD mode, radio mode, and semiconductor audio mode, the reference output volume value is set in the descending order of CD mode, MD mode, radio mode. The semiconductor audio mode can be set. Thereby, the effect by 1st Embodiment becomes still more remarkable.

  As mentioned above, although this invention was demonstrated based on 1st Embodiment and 2nd Embodiment, this invention is not limited to this. For example, in the embodiment, the operation control of the cooling fan 9 is performed based on the operation of the input device 14 by the user. However, the present invention is not limited to this. As long as the operation control is performed, other configurations such as determining the operation mode and the output volume based on the audio signal input and output by the DSP 7 and controlling the operation of the cooling fan 9 may be used.

  In the embodiment, whether or not to operate the cooling fan 9 is determined based on the operation mode of the CD mode, the MD mode, the radio mode, and the semiconductor audio mode, but is not limited thereto. The determination may be made based on whether or not a motor driving operation for driving a medium such as CD or MD is involved.

  In the embodiment, for each operation mode, it is determined whether or not the volume value at that time is a volume at which the cooling fan 9 is operated. It may be determined whether or not is an operation mode for operating the cooling fan 9.

  In the embodiment, when the power of the audio device 100 is turned off (operation stop is instructed), the supply of the ACC power to the cooling fan 9 is stopped, and the operation of the cooling fan 9 is stopped. Not limited to this, even if the power of the audio device 100 is turned off, the power is supplied to the cooling fan 9, so that even if the power of the audio device 100 is turned off, depending on the previous operation mode, The operation of the cooling fan 9 may be stopped after the time set in advance for each operation mode has elapsed. For example, when the operation mode immediately before the audio device 100 is turned off is an operation mode with a large amount of heat generation such as a CD mode or an MD mode, the cooling fan 9 is turned on 3 minutes after the power is turned off. When the operation is stopped and the operation mode has a small calorific value, such as the radio mode or the semiconductor audio mode, the operation of the cooling fan 9 is stopped 30 seconds after the power is turned off. An increase in internal temperature after the power is turned off may be suppressed.

It is a block diagram which shows the functional structure of an audio apparatus. It is the flowchart which showed the operation control of the cooling fan by the audio apparatus in 1st Embodiment. It is the flowchart which showed the operation control of the cooling fan by the audio apparatus in 2nd Embodiment.

Explanation of symbols

9 Cooling fan 100 Audio device

Claims (9)

In an audio device comprising a cooling fan and having a plurality of operation modes,
Mode determining means for determining the current operation mode;
Drive control means for driving the cooling fan when the operation mode is a predetermined operation mode;
An audio apparatus comprising: The audio device according to claim 1.
The audio apparatus characterized in that the operation mode includes a motor drive operation for driving a medium. The audio device according to claim 1 or 2,
It has a volume judgment means for judging the current volume,
An audio apparatus, wherein the cooling fan is driven when the predetermined operation mode and a predetermined reference sound volume or higher. The audio device according to claim 3, wherein
An audio apparatus, wherein a predetermined reference volume for driving the cooling fan is set for each operation mode. The audio device according to claim 3, wherein
An audio device, wherein an operation mode for driving the cooling fan is set for each volume range. 6. The audio device according to claim 1, wherein
The operation control means stops the operation of the cooling fan after a predetermined time set in advance for each operation mode when an operation stop of the audio device is instructed. apparatus. The audio device according to any one of claims 1 to 6,
The audio apparatus according to claim 1, wherein the operation mode includes a radio mode. In a control method for controlling an audio device including a cooling fan and having a plurality of operation modes,
A mode determination process for determining the current operation mode;
A drive control process for driving the cooling fan when the operation mode is a predetermined operation mode;
A method for controlling an audio device comprising: In a control program for controlling an audio device including a cooling fan and having a plurality of operation modes by a computer,
To determine the current mode of operation,
When the operation mode is a predetermined operation mode, drive control for driving the cooling fan is performed.

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