JP2000244165A - Dust-proofing device for display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a dust-proofing device for a plasma display, capable of retaining sufficient air flow and preventing cooling efficiency from reducing by removing dust adsorbed to a dust collection filter or adhered to a cooling fan, at regular intervals. SOLUTION: A piezoelectric element 6 is attached to a cooling fan 4, a voltage is applied to the piezoelectric element 6 of a prescribed frequency, thereby oscillating the cooling fan 4 at a prescribed oscillation frequency and removing dust adhered to the cooling fan 4 through the oscillation. Also, since a shutter is provided in an inlet port, a brush is attached to the inside of the shutter, which removes dust by brushing the dust collection filter, and the adsorbed dust is removed by brushing the dust collection filter whenever the shutter is opened and closed, sufficient air flow is retained and life time can be expected to be prolonged without degradation in cooling performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display dustproof device, and more particularly to a forced air-cooled display dustproof device.

[0002]

2. Description of the Related Art Conventionally, a dustproof device for a display is shown in FIG.
As shown in FIG. 1, an intake port 1a and an exhaust port 1b provided in the housing 1.
A heat-generating component 3 such as a PDP (plasma display panel) 3a, a PDP drive board 3b, a power supply board 3c, etc., and a cooling fan 4 are arranged in a ventilation path 2 communicating the The heat is dissipated and dust is prevented from entering the housing by the dust collecting filter 5 provided in the intake port 1a. However, in this configuration, the dust is adsorbed on the dust collecting filter 5 and the amount of ventilation gradually decreases, and the dust passing through the dust collecting filter 5 adheres to the cooling fan 4 and becomes a load on the cooling fan, thereby impairing the cooling efficiency. There was a problem that would.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and reduces the dust adsorbed on the dust collecting filter and the dust adhering to the cooling fan at regular intervals, thereby securing the ventilation volume. It is an object of the present invention to provide a display dustproof device that can prevent a reduction in cooling efficiency.

[0004]

According to the present invention, a PDP (Plasma Display Panel), a PDP (Plasma Display Panel) and a PDP (Plasma Display Panel) are provided in a ventilation passage communicating between an intake port and an exhaust port provided in a housing.
A heat-generating component such as a DP drive board and a power supply board and a cooling fan are arranged to forcibly dissipate the heat of the heat-generating component.
A dustproof device for a display, wherein dust is prevented from entering the housing by a dust collecting filter provided at an intake port,
A piezoelectric device is attached to the cooling fan, and a voltage of a predetermined frequency is applied to the piezoelectric device to provide a dustproof device for a display.

The cooling fan blades are formed of piezoelectric elements, and a dustproof device for a display is provided in which a voltage of a predetermined frequency is applied to the piezoelectric elements.

A PDP (Plasma Display Panel) and a PDP (Plasma Display Panel) are provided in an air passage that connects an intake port and an exhaust port provided in the housing.
A heat-generating component such as a DP drive board and a power supply board and a cooling fan are arranged to forcibly dissipate the heat of the heat-generating component.
A dustproof device for a display, wherein dust is prevented from entering the housing by a dust collecting filter provided at an intake port,
A shutter is provided at the intake port, and a dustproof device for a display is provided with a brush for brushing the dust collection filter to remove dust inside the shutter.

The shutter is opened when the power of the display is turned on, and is closed when the power is turned off.

[0008] A dustproof device for a display in which a plunger for opening and closing the shutter is connected to the shutter.

A dustproof device for a display, wherein a motor for opening and closing the shutter is connected to the shutter.

The dust filter is wound endlessly between two rotating rollers, and the same rotating roller is provided with a handle for rotating the rotating roller to provide a dustproof device for a display.

A motor is connected to the one rotating roller,
The display is a dustproof device that rotates the rotating roller in conjunction with opening and closing of the shutter. In addition, while the motor is operating, the intake port is opened and the cooling fan rotates in the reverse direction to provide a dustproof device for the display.

A dust box is provided below the dust filter,
The dust collector of the display is configured to collect dust dropped from the dust collecting filter by the brush.

[0013] The present invention is a dustproof device for a display in which the dust box is detachably mounted.

The dust collecting box is provided with a sensor for detecting that the dust exceeds a certain amount.

[0015]

As described above, in the dustproof device for a display according to the present invention, a piezoelectric element is attached to a cooling fan, and a voltage of a predetermined frequency is applied to the piezoelectric element. Because it vibrates at a predetermined frequency,
Dust adhering to the cooling fan can be removed by the vibration. In addition, a shutter was provided on the intake port, and a brush for brushing the dust collection filter to remove dust was installed inside the shutter, so that each time the shutter was opened and closed, the brush rubbed the dust collection filter and was attracted. Since the dust is dropped, the amount of ventilation can be secured, and a long life can be expected without deterioration of the cooling performance. In addition, since a dust collection box is arranged below the dust collection filter and a sensor is provided in the dust collection box, the rubbed dust does not fly again in the air, and if the collected dust exceeds a certain amount. Since this is notified, forgetting to clean can be prevented, and a comfortable state can always be maintained.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a dustproof device for a display according to the present invention. FIG. 7 is a sectional side view of a main part of the plasma display. In the figure, reference numeral 1 denotes a housing of a plasma display, which has an intake port 1a at a lower rear portion and a lower rear portion, and an exhaust port 1b at a rear upper portion. Reference numeral 2 denotes an air passage connecting the intake port 1a and the exhaust port 1b.
Heat generating components 3 such as 3a, a PDP drive board 3b, and a power supply board 3c are arranged, and a cooling fan 4 rotated by a fan motor 4b faces the exhaust port 1b. Reference numeral 5 denotes a dust collecting filter which is attached to the intake port 1a. FIG. 1 is an enlarged view of a main part of the cooling fan 4, FIG. 1- (A) is a view from the front, and FIG. 1- (B) is a side view. As shown in the drawing, a piezoelectric element 6 that vibrates at the frequency when an AC voltage is applied is attached to the blade 4 a of the cooling fan 4. In this embodiment, the piezoelectric element 6 is attached to the blade 4a, but the blade 4a itself may be formed by the piezoelectric element 6. Alternatively, the piezoelectric element 6 may be attached to the center of the cooling fan 4 so that the entire cooling fan 4 vibrates. FIG.
-As shown in (B), rotating electrodes 4a1 and 4a2 connected to the piezoelectric element 6 are provided at the base of the rotating blade 4a, and the rotating electrodes 4a are provided on the non-rotating portion of the fan motor 4b.
a1 and 4a2, a brush 4b1 that slides is provided, and the piezoelectric element 6 is supplied from the AC voltage source 6a via the brush 4b1.
Is applied with an AC voltage having a predetermined frequency.
Then, by applying an AC voltage having a predetermined frequency to the piezoelectric element 6, the blades 4a or the whole of the cooling fan 4 are vibrated to blow off dust attached to the cooling fan 4.

FIG. 2 is an enlarged view of a main part showing another embodiment of the present invention, in which (A) is a side view and (B) is a plan view. In the figure, reference numeral 7 denotes a guide 1 provided near the intake port 1a.
The shutter is slidably mounted on the shutter. Inside the shutter 7, the dust collecting filter 5 is provided.
And a handle 7a for opening and closing the shutter 7 is provided on the outside. The brush 8 rubs the dust collection filter 5 by opening and closing the shutter 7 to brush and remove dust adsorbed on the dust collection filter 5. Reference numeral 9 denotes a pair of rotary rollers for winding the dust collection filter 5 endlessly. One of the rotary rollers 9 is provided with a handle for rotating the rotary roller 9.

FIG. 3 is an enlarged view of a main part showing another embodiment of the present invention. In the drawing, reference numeral 10 denotes a plunger including a coil 10a and a movable iron core 10b, 12a, 12b, and 12c.
Is a link rod. The movable iron core 1 of the plunger 10
0b and link rod 12a, link rod 12a and link rod 12
b, link rod 12b, link rod 12c, link rod 12c
And the shutter 7 are rotatably connected to each other,
The link rod 12b is pivoted about the support shaft 11 and the movable iron core 1 of the plunger 10 of the link rod 12b.
The connection portion with Ob is urged upward by a coil spring 13. When a current flows through the coil 10a of the plunger 10, the movable iron core 10b is sucked downward, the link rod 12b is rotated via the link rod 12a, and the link rod 12b slides the shutter 7 upward. To open the intake port 1a. Further, by cutting off the current flowing through the coil 10a of the plunger 10, the movable iron core 10b is pulled up by the coil spring 13, rotates the link rod 12b, and slides the shutter 7 downward via the link rod 12c. By closing the intake port 1a, the brush 8 is moved up and down to clean the dust collection filter 5 and prevent dust from adhering to the dust collection filter 5.

FIG. 4 is an enlarged sectional view of a main part showing another embodiment of the present invention. In the figure, 14 is a pinion gear 15,
A motor that opens and closes the shutter 7 via a rack gear 7b provided on a side surface of the shutter 7. For example,
When the power of the plasma display is turned on, this motor 1
4, the shutter 7 is raised to open the intake port 1a, and when the power is turned off, the motor 14 is rotated in reverse to lower the shutter 7 to close the intake port 1a, thereby moving the brush 8 up and down to collect dust. The filter 5 is cleaned and dust is prevented from adhering to the dust collection filter 5.

FIG. 5 is an enlarged view of a main part showing another embodiment of the present invention. In the figure, reference numeral 16 denotes a motor which is connected to the rotating roller 9 and winds up the dust collecting filter 5 endlessly. For example, immediately after turning on the power of the plasma display, by rotating this motor 16 before rotating the cooling fan 4, the rotating roller 9 is rotated, and the dust collection filter 5 is attached to the brush 8 attached to the shutter 7. Rubbing is performed to remove the dust adsorbed on the dust collecting filter 5 and clean it. After cleaning, the shutter 7 is raised and the intake port 1a is opened.
And the cooling fan 4 is rotated.
During cleaning, the shutter 7 may be raised to open the air inlet 1a, and the cooling fan 4 may be rotated in the reverse direction to discharge the rubbed dust to the outside so as not to enter the inside of the housing 1.

FIG. 6 is an enlarged sectional view of a main part showing another embodiment of the present invention. In the figure, reference numeral 17 denotes a dust collection box which is disposed below the dust collection filter 5 so as to be freely drawn out. The dust dropped from the dust filter 5 by the brush 8 is collected in this dust box. The dust collecting box 17 is provided with a sensor 18 for detecting that the dust exceeds a certain amount. This sensor is, for example, a horizontally arranged LE
It comprises a light emitting element 18a such as D and a light receiving element 18b such as a phototransistor. When dust exceeds a certain amount, light is emitted from the light emitting element 18a, and the amount of light received by the light receiving element 18b is detected by reducing the amount of light received. I have.

[0022]

As described above, according to the dustproof device for a display according to the present invention, a piezoelectric element is attached to a cooling fan, and a voltage of a predetermined frequency is applied to the piezoelectric element, whereby the cooling fan can be cooled. Since it vibrates at a predetermined frequency, dust adhering to the cooling fan can be removed by the vibration. Also, a shutter is provided at the intake port,
A brush for brushing the dust collection filter to remove dust is installed inside the shutter, so that each time the shutter is opened and closed, the brush rubs the dust collection filter and drops the adsorbed dust, so that the airflow can be secured. A long life can be expected without deterioration of the cooling performance. In addition, since a dust collection box is arranged below the dust collection filter and a sensor is provided in the dust collection box, the rubbed dust does not fly again in the air, and if the collected dust exceeds a certain amount. Let me know this,
It is possible to prevent forgetting to clean and always maintain a comfortable state.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an embodiment of a dustproof device for a display according to the present invention, and is an enlarged view of a main part of a cooling fan.

FIGS. 2A and 2B are enlarged views of a main part showing another embodiment of a dustproof device for a display according to the present invention, wherein FIG. 2A is a side view and FIG.

FIG. 3 is an enlarged view of a main part showing another embodiment of a dustproof device for a display according to the present invention.

FIG. 4 is an enlarged sectional view of a main part showing another embodiment of a dustproof device for a display according to the present invention.

FIG. 5 is an enlarged view of a main part showing another embodiment of a dustproof device for a display according to the present invention.

FIG. 6 is an enlarged sectional view of a main part showing another embodiment of a dustproof device for a display according to the present invention.

FIG. 7 is a side sectional view showing a main part of a conventional dustproof device for a display.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Plasma display housing 1a Inlet 1b Exhaust 2 Air path 3 Heating component 3a PDP 3b PDP drive board 3c Power board 4 Cooling fan 4a Blade 4a1, 4a2 Rotating electrode 4b Fan motor 4b1 Brush 5 Dust filter 6 Piezoelectric element 6a AC voltage source 7 Shutter 7a Handle 7b Rack gear 8 Brush 9 Rotary roller 10 Plunger 10a Coil 10b Movable iron core 11 Support shaft 12a, 12b, 12c Link rod 13 Coil spring 14 Motor 15 Pinion gear 16 Motor 17 Dust collection box 18 Sensor

Claims (12)

[Claims] A PDP (Plasma Display Panel) is provided in an air passage that connects an intake port and an exhaust port provided in a housing.
Heating components such as a PDP drive board and a power supply board, and a cooling fan are arranged to forcibly radiate the heat of the heating components and prevent dust from entering the housing by a dust collection filter provided at the intake port. A dustproof device for a display, comprising: a piezoelectric element attached to the cooling fan; and a voltage having a predetermined frequency is applied to the piezoelectric element. 2. The dustproof device for a display according to claim 1, wherein the blades of the cooling fan are formed of a piezoelectric element, and a voltage having a predetermined frequency is applied to the piezoelectric element. 3. A PDP (Plasma Display Panel) is provided in an air passage communicating between an intake port and an exhaust port provided in the housing.
Heating components such as a PDP drive board and a power supply board, and a cooling fan are arranged to forcibly radiate the heat of the heating components and prevent dust from entering the housing by a dust collection filter provided at the intake port. A dustproof device for a display, comprising: a shutter provided at the intake port; and a brush for brushing the dust collecting filter to remove dust is attached inside the shutter. 4. The dustproof device for a display according to claim 3, wherein the shutter opens when the display is turned on and closes when the display is turned off. 5. The dustproof device for a display according to claim 4, wherein a plunger for opening and closing the shutter is connected to the shutter. 6. The dustproof device for a display according to claim 4, wherein a motor for opening and closing the shutter is connected to the shutter. 7. The dust collecting filter is wound endlessly between two rotating rollers, and the same rotating roller is provided with a handle for rotating the rotating roller. The dustproof device for a display according to claim 1. 8. The dustproof device for a display according to claim 7, wherein a motor is connected to the one rotating roller, and the rotating roller is rotated in conjunction with opening and closing of the shutter. 9. The dustproof device for a display according to claim 8, wherein the intake port is opened and the cooling fan rotates in reverse while the motor is operating. 10. The dust-proofing device for a display according to claim 3, wherein a dust-collecting box is provided below the dust-collecting filter, and the brush collects dust dropped from the dust-collecting filter. 11. The dustproof device for a display according to claim 10, wherein the dust collecting box is attached so as to be able to be taken in and out. 12. The dust collecting box is provided with a sensor for detecting that dust exceeds a certain amount.
A dustproof device for a display according to claim 11 or claim 12.