JP2006245431A - Electric apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove dust or the like which accumulates in a filter provided to an electric apparatus. <P>SOLUTION: First and second blast means 2, 5 exhausting gas inside a housing to an outside are provided to two places of a housing 1 of the electric apparatus. First and second filters 4, 7 are provided to an outlet of gas exhausted by the blast means 2, 5. The apparatus is constituted so that the second blast means 5 is stopped while the first blast means 2 works, and the first blast means 2 is stopped while the second blast means 5 works. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electrical device, and more particularly to an electrical device suitable for application to an electrical device including a blower that radiates heat inside a housing.

Conventionally, an electric product that generates heat sometimes uses a fan to dissipate heat in the housing. For example, a television receiver in which an air purifying filter (hereinafter referred to as “filter”) is provided at an air intake port and a fan is provided at an outlet so as to force convection between the inside and outside of the housing is patented. It is described in Document 1. According to the invention described in Patent Document 1, it is possible to prevent dust and dirt from entering the housing of the television receiver, so that dust and dust react with moisture and the like inside the housing. This eliminates the possibility of malfunctions and cleans the surrounding air.
Japanese Patent Laid-Open No. 10-145703

  By the way, in the system described in Patent Document 1, dust or the like may adhere to the filter surface serving as an air inlet and the filter may be clogged. However, if the filter has a rough mesh, dust or the like enters the housing, and the air purification effect of the filter is reduced.

  This invention is made | formed in view of such a point, and it aims at enabling it to remove the dust etc. which accumulate on the filter part provided in the electric equipment.

  In order to solve the above-described problem, the present invention discharges the gas inside the housing to two locations of the housing of the electric equipment by the first and second air blowing means and the air blowing means, respectively. First and second filters are respectively provided at the gas outlets, and the second blowing means is stopped when the first blowing means is in operation, and the first blowing means is set when the second blowing means is in operation. It is characterized by stopping.

According to the above configuration, since the second blowing unit is operated while the first blowing unit is stopped, the exhaust direction of the first blowing unit is generated by the air flow generated by the second blowing unit. Purified air is taken into the housing through the first filter provided in the housing, and dust or the like accumulates on the surface of the first filter.
Next, when the second air blowing means is stopped and the first air blowing means is operated, the dust or the like accumulated on the surface of the first filter is blown off by the air flow generated by the first air blowing means. Removed.

  According to the present invention, dust and the like accumulated on the filter portion can be forcibly removed, so that the filter can be prevented from being clogged.

  Examples of the best mode for carrying out the present invention will be described below, but the present invention is not limited to the following examples.

First, the concept of the heat dissipation method for electrical equipment according to the present invention will be described with reference to FIGS. 1A and 1B.
1A and 1B are diagrams schematically showing a cross section of an electrical equipment product. The product housing 1 has two air vents facing each other in order to dissipate heat inside the housing to the outside, and a fan functioning as a blowing means and an air cleaning filter are installed in each air vent.
In this example, the fan 2 is supported at the upper vent of the product housing 1, and the fan 2 is supported by the support 3 in the direction of exhausting the gas, that is, at the outlet side (above the fan 2 in FIGS. 1A and 1B). A filter 4 is installed. Further, a fan 5 and a fan 5 and a direction in which the fan 5 exhausts gas, that is, an outlet side (above the fan 5 in FIGS. 1A and 1B) are supported by a support base 6 at a lower vent of the product housing 1. A filter 7 is installed.
The fans 2 and 5 are controlled by a control device such as a CPU (Central Processing Unit) (not shown) to stop the fan 5 while the fan 2 is operating and to stop the fan 2 while the fan 5 is operating.

In this example, a fan is used as the air blowing means, but the method is not limited as long as it operates in the direction of exhausting the gas in the product housing 1 to the outside.
The filter is, for example, a resin or metallic mesh shape or slit shape. Or the nonwoven fabric etc. which used the flame-retardant fiber etc. can also be used.

Next, the relationship between the operations of the fans 2 and 5 and the airflow generated thereby will be described.
As shown in FIG. 1A, when the fan 5 is activated and the fan 2 is stopped, the air flow 10 in the exhaust direction generated by the fan 5 (downward in the drawing in FIG. 1A) sucks air near the opposing vent. Direction airflow 11 (downward direction in FIG. 1A) is generated, and the air purified by the filter 4 is taken into the product housing 1. At this time, dust, dirt, dust (hereinafter collectively referred to as “garbage”) and the like accumulate on the surface 4 a of the filter 4.

  After a certain time, for example, one hour later, the fan 5 is stopped and the fan 2 is started. Then, as shown in FIG. 1B, the airflow 12 in the exhaust direction (upward on the paper surface in FIG. 1B) generated by the fan 2 causes the airflow 13 in the intake direction (upward on the paper surface in FIG. 1B) near the opposing vent. The air generated and purified by the filter 7 is taken into the product housing 1. At this time, dust or the like accumulated on the surface of the filter 4 is blown off by the airflow in the exhaust direction generated by the fan 2 and removed. Further, dust accumulates on the surface 7a of the filter 7 serving as an air suction port.

  Thereafter, the fan 2 is stopped after a certain time and the fan 5 is started again. This time, since the air flow 10 in the exhaust direction is generated again by the fan 5, the dust accumulated on the surface 7a of the filter 7 is removed. The operation switching between the fan 2 and the fan 5 as described above is performed at predetermined time intervals (periodically), and the direction of the airflow is periodically reversed.

  The mounting position and positional relationship of the fan 2 and the fan 5 are not limited to this example, and various conditions such as a place where heat can be effectively dissipated inside the product housing 1 and a problem of design space are considered. It is preferable to do so. In addition, it is desirable to set and change the repetition period as appropriate in consideration of various conditions such as the usage state of the electrical equipment, the heat generation state, and the fineness of the filter.

  In the above configuration, by periodically switching between the operation and stop of the fan 2 and the fan 5, it becomes possible to prevent the filters 4 and 7 from being clogged for a long time.

Next, an example of a suitable transmissive liquid crystal display device to which the present invention is applied will be described with reference to a schematic sectional view of FIG.
As shown in FIG. 2, the liquid crystal display device includes a transmissive liquid crystal display panel 21 and a backlight device 22 provided on the back side thereof, and is housed in a liquid crystal display device housing 20. In this example, a plurality of fluorescent tubes 23 are used as the light source of the backlight device 22. The light emitted from each fluorescent tube 23 is directly or directly reflected by the reflecting plate 24 and then converted into illumination light having optical characteristics optimal for illumination of the diffusion plate 25 and the liquid crystal display panel 21 for diffusing the light. The liquid crystal display panel 21 is irradiated through an optical sheet group 26 made of sheets.

  In the liquid crystal display device having the above-described configuration, the fan 2 and the filter 4 are provided on the upper surface 20 a of the liquid crystal display device housing 20. Further, the fan 5 and the filter 7 are provided at the lower part of the back surface 20b of the liquid crystal display device casing 20. Then, similarly to the example of FIGS. 1A and 1B, the fan 2 and the fan 5 are periodically switched and started.

As shown in FIG. 2, when the fan 5 is started with the fan 2 stopped, the fan 5 generates an airflow 10 in the exhaust direction on the filter 7 and an airflow 11 in the intake direction on the filter 4 on the upper surface 10a. To do. As a result, the air purified through the filter 4 is taken into the liquid crystal display device housing 20 and dust or the like is deposited on the filter 4.
Then, when the fan 5 is stopped and the fan 2 is started after a certain time, the fan 2 generates an airflow 12 in the exhaust direction on the filter 4 and an airflow 13 in the intake direction on the filter 7 on the back surface 20b. Thereby, the air purified by the filter 7 is taken into the liquid crystal display device casing 1. At this time, dust or the like accumulated on the surface of the filter 4 is blown off by the airflow in the exhaust direction by the fan 2 and removed. In addition, dust accumulates on the filter 7 serving as an air suction port.
Thereafter, when the fan 2 is stopped and the fan 5 is started again after a certain time, the fan 5 generates an airflow 10 in the exhaust direction in the filter 7 and an airflow 11 in the intake direction in the filter 4. Thereby, the dust etc. which accumulated on the filter 7 are removed.

  Switching between the operation of the fan 2 and the fan 5 as described above is periodically performed to reverse the direction of the air flow, and dust and the like accumulated on the filter 4 and the filter 7 are removed. Further, since the space between the back surface of the backlight device 22 and the back surface of the liquid crystal display device housing 20 is a flow path for the air flow generated by the fan 2 or 5, the backlight device 20 or the substrate disposed on the back surface of the backlight device 20 is used. (Not shown) etc. can be directly cooled and heat can be radiated to the outside.

Furthermore, an example of a CRT monitor suitable to which the present invention is applied will be described with reference to a schematic sectional view of FIG.
In FIG. 3, high voltage portions such as a cathode ray tube (CRT) 31, a flyback transformer 32, an anode cap 33, and a deflection yoke 34 are provided inside the CRT monitor housing 30.
2, the fan 2 and the filter 4 are provided on the upper surface 30a of the CRT monitor housing 30, and the fan 5 and the filter 7 are provided on the lower surface 30b of the CRT monitor housing 30. Similar to the example of FIG. 2, the operation and effect similar to those of the example of FIG. 2 can be obtained by periodically switching the operation of the fan 2 and the fan 5.

  According to these configurations described above, since the two fans provided in the product casing are operated by alternately switching to remove dust accumulated on the filter, the filter can be prevented from being clogged for a long time. As a result, stable heat dissipation of the product can be realized.

  The present invention is not limited to the above-described embodiments, and the types of electrical equipment to be applied such as a television receiver, a personal computer, a video camera, a DVD (Digital Versatile Video Disk) recorder, and two fans. It goes without saying that various configurations can be taken without departing from the gist of the present invention, such as the mounting position and positional relationship of the (air blowing means).

It is a figure showing the concept of the electric equipment which concerns on one embodiment of this invention. 1 is a schematic cross-sectional view of a liquid crystal display device according to an embodiment of the present invention. It is a schematic sectional drawing of the CRT monitor which concerns on one embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Product housing | casing, 2,5 ... Fan, 4,7 ... Filter 10, 11, 12, 13 ... Airflow, 20 ... Liquid crystal display device housing | casing, 30 ... CRT monitor housing | casing

Claims (2)

First and second air blowing means for discharging the gas inside the housing to the outside at two locations of the housing of the electric equipment, and first and second outlets for the gas discharged by the air blowing means, respectively. A filter is provided,
While the first air blowing means is in operation, the second air blowing means is stopped,
The electric device characterized in that the first air blowing unit is stopped while the second air blowing unit is in operation. The electric device according to claim 1, wherein the operation of the first and second air blowing means is periodically switched.

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