KR100564400B1 - Auto dust filter cartridge device for the projection television - Google Patents

Abstract

The present invention relates to a dust filter automatic exchange device of a projection television, and it is possible to check the normal operation of the filter in which the outside air is introduced from time to time, and to replace the filter automatically in the event of a filter, the air flow inside the projection television is always maintained. Filter detecting means for detecting an operating state of the dust filter so as to smoothly and smoothly distribute it; A controller for determining whether to replace the filter by determining a state of the filter based on whether the filter is measured by the filter detecting unit; Filter replacement means for replacing the dust filter according to whether to replace the control unit; And a dust filter automatic exchange device of the projection television, including an OSD control unit for displaying the state of the filter replacement means and the state of the filter on the screen of the projection television, based on the signal of the control unit, to be sucked into the projection television. The flow rate is measured at the inlet port to determine whether the filter is normal, and the filter is automatically replaced from the determined result. The effect of improving the reliability of the projection television by maintaining the cooling efficiency with the convenience of automatically replacing the filter at an appropriate time. There is.

Projection TV, dust filter, flow rate

Description

Auto dust filter cartridge device for the projection television

1 is a cross-sectional schematic diagram of a conventional projection television.

Figure 2 is a block diagram showing the configuration of the present invention.

3 is a sectional view of principal parts of a projection television according to the present invention;

4 is a plan view of an automatic exchange device according to the present invention.

5 is a flowchart for explaining the present invention.

<Description of the symbols for the main parts of the drawings>

10: projection TV main body 15: intake vent

20: flow sensor 30: drive motor

32: dust filter 34: filter cartridge

40: control unit 42: filter detection means

46: filter replacement means 48: OSD control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust filter automatic exchange apparatus of a projection television, and more particularly, to a projection television dust filter which can automatically replace and grasp the filter performance of the outside air to cool the main components of the projection television. It relates to an automatic exchange device.

In general, a projection television is a video display device that displays light containing a video signal generated by using a cathode ray tube or an LCD on a screen. In particular, a projection television having a cathode ray tube is installed because of its excellent price-performance ratio. It is competitive in the market and it is easy to form a large screen, and it has been sold a lot in recent years.

Since the cathode ray tube is installed in the projection television, its own heat dissipation is the biggest problem of the projection television, and various cooling devices have been developed.

In particular, for the heat dissipation of the projection television, a predetermined cooling apparatus is provided inside the projection television, and the cooling apparatus and the ducts and slits for the heat dissipation thereof are configured.

Reference is made to FIG. 1 to describe this in more detail.

Inside the main body 10 of the projection television, an optical system 45 having a high-power lamp for emitting a light beam and its associated mechanism is provided, and after the light beam is emitted from the optical system 45 and passes through the LCD panel, an image signal is generated. It is contained and projected onto the screen of the main body 10.

On the other hand, high heat is generated in the high power lamp installed in the optical system 45, and the LCD panel is a device that is weak in heat as is well known.

One or more heat dissipation fans 40 are installed inside the main body 10 for cooling between the high power lamp and the LCD element.

In addition, the heat dissipation fan 40 is installed to communicate with the heat dissipation duct 50 so that the high-temperature air flow radiated by the optical system 45 to the outside without remaining in the main body 10, the front air intake A slit type inlet 15 is formed, and the inlet 15 is provided with a filter 65 for blocking dust from the outside.

The heat dissipation duct 50 is typically opened to the rear of the main body 10 to be installed to discharge a high-temperature air flow to the rear of the main body 10, the heat dissipation fan 40 in communication with the heat dissipation duct 50 is an intake vent Through 15, the air is sucked to a low temperature from the outside, and the LCD panel is cooled and discharged through the heat radiation duct 50 connected to the elbow.

In the heat dissipation structure of the projection television as described above, a filter 65 is installed in the inlet 15 through which air flowing by the heat dissipation fan 40 is inhaled, and the filter 65 purifies dust from the outside air. Therefore, the intake port 15 is clogged or the function of the filter 65 is degraded due to the accumulation of dust during long time use, and thus there is an inconvenience in that the filter 65 needs to be replaced or cleaned periodically.

The present invention has been invented in view of the above problems, and an object of the present invention is to check the normal operation of the filter in which the outside air is introduced from time to time, and in the case of a filter abnormality, the filter can be replaced automatically so that the inside of the projection television The present invention relates to a dust filter automatic changer of a projection television that can always smoothly flow air flow normally.                         

In order to achieve the above object, the present invention, in a projection television equipped with a dust filter, is installed in the rear of the dust filter inside the main body of the projection television, by measuring the fluid flow amount of the outside air passing through the filter to the top of the filter Filter detection means having a flow rate detection means for detecting the presence or absence; A control unit for controlling the filter replacement means by determining that the filter is replaced when the flow rate is less than or equal to the predetermined preset flow rate based on the fluid flow rate information measured by the flow rate detection means of the filter detection means; A plurality of dust filters disposed therein, the filter exchanging means including a filter cartridge capable of sequentially arranging the dust filters disposed thereon and a drive motor for driving the filter cartridges under the control of a controller; And, based on the signal of the control unit, there is provided a dust filter automatic exchange apparatus for a projection television comprising an OSD control unit for displaying whether or not to replace the filter replacement means and the state of the filter on the screen of the projection television.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

A block diagram according to the configuration of the present invention is shown in FIG.

In FIG. 2, the present invention provides a filter detecting means 42 for detecting an operating state of a dust filter installed inside the projection television main body 10 and installed in the intake port 15 through which outside air is sucked, and the filter detecting means ( On the basis of the operation state of the filter measured in 42), the control unit 40 for determining whether to replace the filter by determining the state of the filter, and for replacing the dust filter in accordance with the determination of replacement of the control unit 40 OSD control unit 48 for displaying on the screen of the projection television whether or not the filter changing unit 46 is replaced, and the state of the filter, based on the filter replacement unit 46 and the signal of the control unit 40. It is configured to include).

In order to detect whether the filter is normal in the filter detecting means 42, the present invention measures the fluid flow amount of the outside air passing through the filter, and detects whether the measured fluid, that is, the flow rate of the outside air is the normal flow rate. It is a flow measurement means for detecting the presence or absence of.

Therefore, the filter detecting means 42 is installed on the rear face of the inlet port 15 through the mounting arm 25 inside the main body 10 of the projection television as shown in FIG. It includes a fluid flow rate sensor 20 for sensing the flow rate of the outside air flow.

On the other hand, the control unit 40, compared with the pre-stored predetermined set flow rate based on the fluid flow amount information measured by the flow rate sensor 20 of the filter detecting means 42, the filter 32 when the set flow rate or less ) Is to be replaced to control the filter changing means 46.

Applicants' experiment, the flow rate passing through the filter installed in the main body 10 has been found that the temperature inside the main body 10 rises by more than 10 degrees when the flow rate of about 17% is reduced relative to the normal filter, Based on this, the set flow rate was based on a decrease of 17%. That is, when a flow rate of 17% less than the reference flow rate in the normal filter is detected, the flow rate is determined to be less than or equal to the set flow rate to determine whether the filter 32 is normal.

In addition, the filter replacement means 46 is for replacing the abnormal filter with a normal filter depending on whether the filter 32 is replaced, an embodiment according to the present invention is as shown in Figs.

In Fig. 4, a plurality of dust filters 32 are disposed in the filter cartridge 34, preferably formed in a disk shape. The filter cartridge 34 is installed on the rear surface of the suction port 32 in which the filter 32 is installed inside the main body 10, and the inlet port 15 is disposed at a filter position at a predetermined position among the plurality of dust filters 32. By forming so that the filter cartridge 34 is rotated, it is installed so that it can be sequentially placed in the position of the inlet port (15).

In addition, the filter cartridge 34 is operated by a drive motor 30 driven according to the signal of the controller 40.

Effects of the present invention configured as described above will be described with reference to FIG.

First, when the projection television is operated, a high temperature lamp 45 generates heat to display image information, and a predetermined cooling device is driven by heat generation of the lamp 45.

When driving the cooling device, the outside air is usually sucked by the fan motor 40, and the filter cartridge 34 is installed in the intake port 15 formed in the main body 10 of the projection television for suctioning the outside air. And one of the dust filters of the filter cartridge 34 remains loaded on the inlet port 15.

When the dust filter 32 is mounted in the inlet port 15 and sucks outside air in the filter cartridge 34 as described above, immediately after the filter cartridge 34, the filter detecting means 42, that is, the flow rate sensor. 20 is provided through the installation arm 25.

The air sucked through the intake air of the outside air flows while heating the lamp 45 through a predetermined cooling device. At this time, the outside air is sensed by the filter detecting means 42 while passing through the intake port 15.

The detected flow rate information is input to the controller 40, and the input flow rate information determines whether or not the set flow rate is less than or equal to the set flow rate to determine whether to replace the filter 32. When it is determined that the flow rate within about 17% passes through the filter 32 in the state, the filter 32 determines that the filter is in a normal state and continuously measures the flow rate measured by the flow rate measuring means that is the filter detecting means 42. Compare.

If it is determined by the filter detecting means 42 that the flow rate passing through the filter 32 is less than about 17% below the normal flow rate, the controller 40 compares the set flow rate with the filter 32. The output signal is replaced with the output signal, and the output signal drives the filter changing means 46, thereby rotating the drive motor 30 to rotate the filter cartridge 34.

When the filter cartridge 34 is rotated as described above and the abnormal filter 32 is out of the intake port and the other normal filter 32 is located at the intake port, the control unit 40 stops the driving motor 30. In the normal filter 32 is loaded.

After the filter 32 is replaced as described above, the filter detecting means 42 continuously detects the flow rate to detect whether the filter is normal, even if the filter 32 is replaced immediately, passes through the filter 32. If the flow rate is less than the set flow rate, a problem other than that of the filter itself is generated, so that the controller 40 displays on the screen of the television through the OSD control unit 48 to warn the user of the problem. Done.

On the other hand, in the dust filter automatic changer according to the present invention, in order to allow the user to replace the filter 32 arbitrarily while automatically replacing the dust filter 32, the manual exchange input portion 44 is configured as an external input means. can do.

This can be controlled so that the filter changing means 46 can be driven through the manual changeover input 44 if the user wants to keep the filter cleaner, ie if he wants more air flow than the set flow rate measurement.

Thus, the present invention has the feature that the filter 32 can be replaced automatically by the filter changing means 46 such as the filter cartridge 34 in which the plurality of filters 32 are installed, and in particular, the filter 32 Replacement is characterized in that the filter is determined to be abnormal when the outside air is less than the set flow rate through the suction amount of the outside air passing through the filter, it is characterized in that the filter is automatically replaced by determining whether or not the filter replacement by this feature. .

The dust filter automatic changer of the projection television according to the present invention measures the flow rate at the intake port suctioned into the projection television to determine whether the filter is normal, and automatically replaces the filter from the determined result. In addition to the convenience of automatic replacement, cooling efficiency is maintained to improve the reliability of the projection television.

Claims (5)

In a projection television equipped with a dust filter 32, A filter detecting means (42), which is a flow amount measuring means for measuring the fluid flow rate of the outside air passing through the dust filter (32) to detect whether the filter is normal or not; A controller (40) for determining whether to replace the filter by determining the state of the filter (32) based on whether the filter measured by the filter detecting means (42) is in an operational state; Filter replacement means (46) for replacing the dust filter (32) in accordance with whether or not the control portion (40) is replaced; And On the basis of the signal from the control unit 40, including the OSD control unit 48 for displaying whether or not the filter replacement means 46 and the state of the filter 32 on the screen of the projection television (10) Dust filter automatic exchange device of the projection TV, characterized in that. delete The method of claim 1, wherein the filter detecting means 42, Automatically installed in the main body 10 of the projection television, the rear of the dust filter 32, the dust filter automatic of the projection television including a fluid flow sensor 20 for sensing the flow rate of the outside air flowing in the filter 32 Exchange device. The method of claim 1, wherein the control unit 40, The filter 32 is determined to be replaced when the flow rate is less than or equal to a predetermined preset flow rate based on the fluid flow rate information measured by the flow rate sensor 20 of the filter detecting means 42. The dust filter automatic exchange device of the projection television characterized by controlling the exchange means (46). The method of claim 1, wherein the filter replacement means 46, A plurality of dust filters 32 disposed, the filter cartridges 34 in which the disposed dust filters 32 are sequentially aligned in position; And And a drive motor (30) for driving the filter cartridge (34) under the control of the control unit (40).

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