JP3239376B2 - Cooling device for large-sized video device and cooling method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device and a cooling method which are preferable for use in a large-sized video device.

[0002]

2. Description of the Related Art Large-sized video devices are widely used when providing video information to a large number of viewers in outdoor gatherings or parks. Conventional large-sized video devices generally have a large number of special CRTs or liquid crystal displays arranged.However, since the surface temperature of the screen increases and adversely affects the durability of the CRT, etc., the screen is maintained at a certain temperature. A cooling device for holding below is provided.

[0003]

However, the conventional cooling device for a large-sized video device has a structure in which cooling air blowing nozzles are arranged on the upper and lower sides or on the left and right of the screen, and the cooling air is discharged from the nozzle in parallel with the screen. Therefore, there is a problem that the air discharged from the upper and lower or left and right nozzles collide near the center of the screen, and the cooling effect of this portion is not sufficient. SUMMARY OF THE INVENTION The present invention has been made in view of such problems of the related art, and has as its object to improve the screen cooling effect evenly with a minimum amount of cooling air, thereby conserving energy and improving the durability of the screen. And

[0004]

To achieve the above object, according to the Invention The large video device cooling apparatus of the present invention is provided a portion or the entire circumference of the periphery of the screen of the large-image device, the cooling air blown out possible parallel to the screen, and at least a pair of cooling means disposed so as to face each other, provided at a plurality of positions of the screen, double for detecting the temperature of the screen
A number of temperature detecting means, and detecting the plurality of temperature detecting means.
Out of the plurality of air cooling means based on the temperature of the screen
Control means for selecting an air cooling means for discharging the cooling air .

In the present invention, an air cooling means for discharging cooling air is selected based on the screen temperature detected by the plurality of temperature detecting means. For example, when there is a high-temperature portion on the screen, the screen is efficiently cooled by selecting an air cooling means suitable for cooling this portion.

FIG. 1 shows a large image according to a first embodiment of the present invention.
Perspective view of a device for cooling apparatus, Figure 2 is likewise a front view showing a large-size video device cooling apparatus according to a first embodiment, FIG. 3 is a plan view showing a cooling device for a large-sized image device also according to the first embodiment FIG. 4 is a perspective view showing a cooling device for a large-sized video device according to the second embodiment of the present invention, FIG. 5 is a front view showing a cooling device for a large-sized video device according to the second embodiment, and FIG. It is a front view explaining operation of an example.

[0008] As shown in FIGS.
Is a display in which a number of display devices such as a special CRT or a liquid crystal screen are regularly arranged on the surface.
Are provided and combined with the three primary colors of red, green, and blue to realize desired large-sized video information on the screen 1 of the large-sized video device 2. The large-sized video device 2 is fixed to an outdoor gathering place, a park, a wall of a building, or the like, or is transported to a destination while being mounted on a transport vehicle to provide video information.

The cooling device according to the present embodiment has a cooling air blowing nozzle 3 and is disposed on the left and right sides of the large-sized video device 2 as shown in the figure. The cooling air blowing nozzle 3 has a main body 6 for accommodating cooling air guided from a blower 4 to be described later via a duct 5, and a nozzle port 7 formed in the main body 6 in a slit shape. The main body 6 is fixed to the left and right of the large-sized video device 2 in a state of being formed in a box shape. On the other hand, the slit-shaped nozzle ports 7 are formed at positions facing each other on the left and right main bodies 6 so as to extend vertically. That is, as shown in FIG. 3, the cooling air supplied from the main body 6 flows in parallel along the surface of the screen 1, and
Moreover, the cooling air blown out from the left and right nozzle openings 7 are arranged so as to collide with each other. This is to supply cooling air for efficiently cooling the heat generated in the display, and the setting position of the nozzle port 7 is determined by various conditions such as the shape and size of the screen 1. As shown in FIG. 3, the nozzle opening 7 may be provided with an air distribution plate 8 to change the discharge direction of the cooling air. Conversely, the air distribution plate 8 is omitted and only the slit is formed in the main body 6. Is also good.

A duct 5 is connected to the cooling air blowing nozzle 3, and a blower 4 is connected to the other end of the duct 5.
Is provided. The blower 4 according to the present embodiment sucks outside air as cooling air and blows it to the cooling air blowing nozzle 3, which has an advantage that the structure of the cooling device is simplified. However, the present invention is not limited to this embodiment. A heat exchanger or a cooler is connected to the upstream side of the blower 4 to further cool the outside air with this heat exchanger and to cool the outside air as cooling air. The air may be supplied to the air blowing nozzle 3. In addition, the blowers 4a, 4b according to the present embodiment.
And ducts 5a and 5b are provided for the left and right cooling air blowing nozzles 3a and 3b, respectively. The duct 5 is branched from one blower 4 to supply cooling air to the left and right cooling air blowing nozzles 3a and 3b. It is also possible.
In this case, it is necessary to provide a damper in the duct 5 for switching the supply destination of the cooling air.

In the cooling device according to the present embodiment, a temperature sensor (not shown) is attached to the screen 1 of the large-sized video device 2, and temperature data of the screen 1 is output to control means (not shown). It is preferable that a plurality of such temperature sensors be provided over the entire screen within a range that does not adversely affect the image information. When the temperature data is taken into the control means, the blower is controlled as follows according to the data of each temperature sensor. That is, when temperature data from a plurality of temperature sensors attached to the screen 1 is taken into the control means, the control means determines which part of the screen 1 has the highest temperature. At this time, if any temperature data is lower than a predetermined temperature (for example, 75 ° C.), a stop signal is output to the blower 4 because the screen 1 does not need to be cooled. On the contrary,
For example, when the temperature of the screen 1 on the right side has risen to a predetermined temperature or more, first, an operation signal is output to the right blower 4b to operate the blower 4b, and the cooling air is cooled through the duct 5b. The cooling air is discharged from the nozzle opening 7 on the right side to the blowing nozzle 3b (FIG. 6A). At this time, a stop signal is output to the left blower 4a so that cooling air is not discharged from the left nozzle port 7.

The right screen 1 is supplied by the supply of the cooling air.
When the temperature falls, a stop signal is output to the right blower 4b and an operation signal is output to the left blower 4a. Thereby, the cooling air is supplied to the left cooling air blowing nozzle 3a, and the cooling air is discharged from the left nozzle port 7 (FIG. 6B). The screen 1 is cooled by repeating such an operation. If the temperature of the screen 1 drops below a predetermined temperature during cooling, both the blowers 4a and 4b are stopped and the supply of the cooling air is stopped. It may be configured as follows.
In particular, when the large-sized image device 2 is installed outdoors or the like, a cooling action by natural wind is expected. Therefore, when cooling is not required, information from the temperature sensor is determined by the control means to save energy. It is preferable to aim. In the present invention, the blower can be controlled by a timer instead of the temperature sensor (for example, the left and right blowers are alternately operated at a predetermined time interval). Further, the blower may be controlled by combining a temperature sensor and a timer.

In the cooling apparatus for a large-sized video apparatus according to the first embodiment, the cooling air blowing nozzles 3a and 3b are provided on the left and right sides of the screen 1 so as to face each other. In the present embodiment shown in FIG. The nozzles 3a and 3b are arranged above and below the screen 1 so as to face each other. Other equipment configuration is the first
Although the description is omitted because it is the same as that of the embodiment, the same operation and effect as in the first embodiment can be obtained even when the cooling air blowing nozzles 3a and 3b are arranged above and below the screen 1. .

The present invention can be variously modified without being limited to the above two embodiments. FIG. 7 is a front view for explaining the operation of the third embodiment of the present invention, FIG. 8 is a front view showing a cooling device for a large-sized video device according to the fourth embodiment of the present invention, and FIG. It is a front view explaining the effect | action of such a cooling device for large image apparatuses .

The cooling air blowing nozzles 3 according to the first embodiment are disposed on the left and right sides of the screen 1 and have one nozzle port 7.
Although the cooling air blown out of the nozzle flows over the entire screen, the cooling air blowing nozzles 3a and 3b of the embodiment shown in FIG.
, One of the nozzle openings 7 is further divided vertically into two. That is, as shown in FIG. 7, the inside of the main body 6 of the cooling air blowing nozzle 3 is vertically divided, and the duct 5 from the blower 4 is connected to each of the divided portions.
In this case, it is preferable to provide a damper or the like in the duct 5 for guiding cooling air from the one blower 4 to the two partitioned main bodies 6 through the duct 5, and the operation of the damper is performed by control means. With this configuration, as shown in FIG. 7, when the cooling air is discharged from the upper part of the right cooling air blowing nozzle 3b, the cooling air is discharged from the lower part of the left cooling air blowing nozzle 3a. These two cooling air flows along the surface of the screen 1 without colliding with each other, and performs efficient cooling (FIG. 7).
(A)). Next, by switching a damper or the like in the duct 5, the cooling air is discharged from the lower part of the cooling air blowing nozzle 3b on the right side, and the cooling air is discharged from the upper part of the cooling air blowing nozzle 3a on the left side (FIG. 7).
(B)).

The present invention can be further modified. The embodiment shown in FIG. 8 is a combination of the first embodiment and the second embodiment described above, and the cooling air blowing nozzles 3 are arranged above and below and left and right of the image apparatus 2. That is, similarly to the first and second embodiments described above, the four cooling air blowing nozzles 3a, 3b, 3c, 3d are connected to the four sides of the screen 1 so that the cooling air flows in parallel along the surface of the screen 1. And each cooling air blowing nozzle 3a, 3b, 3c, 3d
Blowers 4a, 4b, 4c, through ducts 5a, 5b, 5c, 5d
4d is connected. In the case of such a configuration, as shown in FIG. 9, after any of the blowers 4a is operated to discharge the cooling air from the cooling air blowing nozzle 3a,
This blower 4a is stopped, and then any other blower 4a is stopped.
b is operated to discharge cooling air from the cooling air blowing nozzle 3b. This operation is sequentially repeated to cool the screen 1. In this case, four cooling air blowing nozzles 3a, 3b, 3
The discharge order of c and 3d is not limited to the embodiment shown in FIG. 9; in other words, while cooling air is being discharged from one cooling air blowing nozzle (for example, 3a), the other cooling air blowing nozzle ( The discharge of the cooling air from 3b, 3c, 3d) may be stopped. Therefore, according to the operation control of the first embodiment described above, the surface temperature of the screen is detected,
The operation is started from the portion having the highest temperature, and if this portion is cooled to a predetermined temperature or lower, control may be performed so as to cool the portion having the next highest temperature. Further, the cooling air may be discharged at predetermined time intervals according to a predetermined discharge order without providing the temperature sensor.

[0017]

As described above, according to the present invention, when cooling air is blown onto a screen on which a plurality of displays are arranged to maintain the screen at a certain temperature or lower, the screen can be viewed from the left and right and / or the top and bottom of the screen. Since the cooling air is discharged alternately, the discharged cooling air does not interfere with each other on the screen surface, and the cooling effect of the discharged cooling air can be efficiently utilized. Therefore, quality deterioration due to heat of the display device can be prevented, and not only image quality can be maintained for a long time, but also durability is extremely excellent.
Further, with the improvement of the cooling effect, the amount of cooling air to be blown to the screen can be reduced, so that the size of the blower can be reduced or the operation time of the blower can be shortened, so that the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a cooling device for a large-sized image device according to a first embodiment of the present invention.

FIG. 2 is a front view showing the same embodiment.

FIG. 3 is a plan view showing the same embodiment.

FIG. 4 is a perspective view illustrating a cooling device for a large-sized image device according to a second embodiment of the present invention.

FIG. 5 is a front view showing the same embodiment.

FIG. 6 is a front view illustrating the operation of the first embodiment.

FIG. 7 is a front view illustrating the operation of the third embodiment of the present invention.

FIG. 8 is a front view illustrating a cooling device for a large-sized image device according to a fourth embodiment of the present invention.

FIG. 9 is a front view illustrating the operation of the embodiment.

[Explanation of symbols]

 1 screen, 2 video equipment, 3 cooling air blowing nozzle, 4 blower, 5 duct.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G09F 9/00-9/46 H05K 7/20

Claims (1)

(57) [Claims] 1. A provided partly around the screen of the large-type imaging device or the entire circumference, parallel to blow out allow cooling air to the screen
And at least one pair of air cooling means arranged to face each other, a plurality of temperature detection means provided at a plurality of locations on the screen, and detecting a temperature of the screen, and a plurality of the temperature detection means. Based on detected screen temperature
To discharge cooling air from the plurality of air cooling means.
A cooling device for a large-sized video device , comprising: a control unit for selecting an air cooling unit.