JP2008275910A - Electric display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric display device having a heat exhausting mechanism, capable of efficiently emitting the heat generated in the inside without having to make an exhaust fan operate, on a steady basis. <P>SOLUTION: In the electric display device 1, a natural ventilation path for introducing external air from lower-side intake holes 11, 12 to the inside 6 of a device chassis 3 and exhausting high-temperature air in the inside 3 to the outside via natural exhaust holes 13, 14 from exhaust ducts 23, 24 for natural ventilation formed on an upper end part 6 is formed. Even if an exhaust fan 8 goes into an off state, heat exhaustion operation is performed efficiently. When internal temperature becomes high and forced ventilation is performed by switching the exhaust fan 8 to on, the exhaust ducts 23, 24 for natural ventilation are blocked, to intercept natural ventilation paths by shutter valves 41, 42, and forced ventilation is performed efficiently by the exhaust fan 8, Thus, fall of the exhaust fan 8 into a state where it is operated at all times is prevented, and generation of side effects resulting from constant operation is avoided. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric display device installed on a street corner or the like and used for displaying various advertisements and promotional characters and images. More specifically, the present invention relates to an electric display device equipped with a heat exhaust mechanism that can efficiently release heat generated inside.

  The light-emitting display device includes light emitters such as LEDs arranged at a predetermined pitch vertically and horizontally or diagonally on the front surface thereof, and is configured to display characters and images by selectively blinking each light emitter. ing. Such electro-optical display devices are disclosed in Patent Documents 1 and 2.

In general, the electro-optical display device includes an apparatus housing attached to an outer wall of a building and the like, and an electro-optical display unit attached and fixed to the front surface of the apparatus housing. In the case of a large electro-optical display device, a large number of electro-optical display units are attached to the front surface of the device casing in a state where they are connected vertically and horizontally.
JP 2005-292555 A JP-A-2005-202301

  Here, since the inside of the light-emitting display device is in a high temperature state due to heat generated by the power supply unit and the light-emitting display unit, the light-emitting display device is provided with a heat exhaust mechanism for releasing the heat generated inside. It is desirable to keep it.

  For example, an exhaust heat mechanism as shown in FIG. 6 can be considered. That is, an air intake hole 103 is formed in the lower end portion of the back plate 102 of the device housing 101 of the electro-optical display device 100, and the outside air introduced from here enters the interior 105 of the device housing 101 via the air filter 104. enter. An exhaust fan 106 is horizontally disposed at the upper end portion of the interior 105 of the apparatus housing 101. The upper side of the exhaust fan 106 is an intake side, and the lower side is an exhaust side. The air discharged downward from the exhaust side of the exhaust fan 106 is discharged to the outside through a forced ventilation hole 107 formed in the back plate 102. When the exhaust fan 106 is in an off state, natural ventilation is performed through the opening of the exhaust fan 106. When the internal temperature of the apparatus housing 101 becomes high, the exhaust fan 106 is turned on and forced ventilation is performed by the exhaust fan 106.

  However, since the exhaust heat mechanism having this configuration is not efficient in natural ventilation, high-temperature air is accumulated in the upper end portion inside the apparatus housing 101, and the exhaust fan 106 is likely to be constantly operated. That is, when the exhaust fan 106 is in the off state, natural ventilation is performed through the exhaust fan, and therefore, a sufficient exhaust opening for natural ventilation cannot be secured. Further, the forced ventilation hole 107 is directed downward so that raindrops and the like do not enter from the outside, and thus ventilation efficiency is poor.

  If the exhaust fan 106 is always in operation, the exhaust fan itself is a consumable item, so its life is shortened and it cannot be used for a long time. If the forced ventilation state is always formed by the exhaust fan 106, dirty outside air, high humidity outside air in bad weather, etc. are always forcibly aspirated, so that the probability of failure of internal electronic components increases. Furthermore, clogging of the air filter 104 is accelerated and the air filter needs to be frequently cleaned and replaced. Furthermore, since exhaust heat is not efficiently performed unless the exhaust fan 106 is operated, the service life is likely to decrease due to a temperature failure of the internal electronic components.

  In view of these points, an object of the present invention is to propose an electric display device having an exhaust heat mechanism capable of efficiently releasing heat generated inside without always operating an exhaust fan. .

In order to solve the above-described problems, the present invention provides a device casing, a light-emitting display unit that is attached to the front surface of the device casing and in which light-emitting elements such as LEDs are arranged, and an interior of the device casing. In an electric display device having an exhaust fan for releasing heat generated in
An air intake hole formed in a lower end portion of the side surface or the back surface of the device housing;
A natural exhaust hole formed in the upper end portion of the side surface or the back surface of the device housing;
A forced ventilation hole formed in a portion below the natural exhaust hole on the side surface or the back surface of the device housing;
An open / close member that opens and closes the natural exhaust hole is provided.

  In the electro-optical display device of the present invention, a natural ventilation path is formed through which outside air is introduced from the lower intake hole of the device casing and the internal high temperature air is discharged to the outside through a natural exhaust hole formed in the upper end portion thereof. ing. Therefore, even when the exhaust fan is off, the exhaust heat operation is performed efficiently. Also, when forced ventilation is performed with the internal temperature becoming high and the exhaust fan is switched on, the natural exhaust path is blocked by closing the natural exhaust hole by the opening and closing member, and the exhaust fan efficiently performs forced ventilation be able to. Since natural ventilation is efficiently performed, it is possible to prevent the forced ventilation state from continuing, that is, to prevent the exhaust fan from being constantly operated, and to avoid the occurrence of adverse effects caused by the continuous operation of the exhaust fan.

  Here, in order to prevent rainwater and the like from entering the inside of the apparatus housing from the outside through the intake holes, natural exhaust holes, and forced ventilation holes, they are introduced from the intake holes into the inside of the apparatus housing. An air intake introducing portion that guides the outside air to the upper side, a natural ventilation exhaust deriving portion that guides air inside the device casing downward from the upper end portion toward the natural exhaust hole, and the device housing It is desirable to have a forced ventilation exhaust lead-out portion that guides the internal air downward toward the forced ventilation hole through the exhaust fan disposed below the exhaust lead-out portion. In this case, the natural ventilation exhaust outlet may be opened and closed by the opening and closing member.

  In order to prevent foreign matter such as dust from entering the inside of the apparatus housing from the outside through the intake hole, the natural exhaust hole, and the forced ventilation hole, an intake-side air filter disposed in the intake air introduction portion And an exhaust-side air filter disposed in the exhaust vent for natural ventilation.

  Further, the device casing in the electro-optical display device of the present invention is usually a flat rectangular parallelepiped shape. In this case, the intake hole, the forced ventilation hole, and the natural exhaust hole may be formed on the back surface of the apparatus housing.

  Next, it is desirable to link the opening / closing member with the exhaust fan. That is, it is desirable that the opening / closing member be driven and controlled to close the natural ventilation hole when the exhaust fan is turned on and open the natural ventilation hole when the exhaust fan is turned off.

  In this case, a temperature sensor is arranged at the upper end portion inside the device casing, and the exhaust fan is switched on when the detected temperature of the temperature sensor exceeds a predetermined set value. When it becomes less than the set value, it may be returned to the off state.

  In addition, when the electric display device is turned off, the natural ventilation hole can be closed by the opening / closing member to prevent intrusion of rainwater, dust, or the like.

  In the electronic display device of the present invention, a forced ventilation path by an exhaust fan and a natural ventilation path are provided separately, and an open / close member is arranged in the natural ventilation path so that the natural ventilation path can be opened and closed. When the exhaust fan is off, the natural ventilation path is opened by the opening and closing member, and the exhaust heat can be efficiently exhausted by natural ventilation. During forced ventilation, the exhaust fan is closed and the exhaust fan is used to exhaust the heat by forced ventilation. Can be performed efficiently.

  According to the present invention, since natural ventilation is efficiently performed, it is possible to prevent the forced ventilation state from continuing, in other words, the exhaust fan from being constantly operated. Therefore, it is possible to avoid the adverse effects caused by the continuous operation of the exhaust fan.

  Embodiments of an electric display device to which the present invention is applied will be described below with reference to the drawings.

  FIGS. 1A and 1B are a front view and a rear view showing an electro-optical display device according to the present embodiment. 2A and 2B are a schematic longitudinal sectional view showing a state during natural ventilation and a schematic longitudinal sectional view showing a state during forced ventilation.

  The light-emitting display device 1 includes a device housing 2 having a flat rectangular parallelepiped shape and a plurality of sets of light-emitting display units 3 attached to the front surface of the device housing 2. Opening and closing doors 4 and 5 for inspection are attached to the left and right sides of the apparatus housing 2, and the inside 6 of the apparatus housing 2 can be inspected by opening these doors. In the interior 6 of the apparatus housing 2, a power supply unit 7 is disposed on the back side portion on the lower end side, and an exhaust fan 8 is horizontally attached to the upper end portion. Electric power supplied from the outside is supplied to each light-emitting display unit 3 and the exhaust fan 8 through the power supply unit 7.

  The left and right open / close doors 4 and 5 attached to the back surface of the apparatus housing 2 are formed with suction holes 11 and 12 having a constant width and length at the lower end portions thereof. In addition, natural exhaust holes 13 and 14 having a constant width and length are formed horizontally at the upper end portions of the open / close doors 4 and 5. Furthermore, rectangular forced ventilation holes 15 and 16 are respectively formed in portions slightly above the middle portion in the vertical direction of the open / close doors 4 and 5.

  Inside the left and right open / close doors 4 and 5 in the apparatus housing 2 are formed intake ducts 21 and 22 that guide the outside air introduced from the intake holes 11 and 12 obliquely upward. Intake air filters 31 and 32 are attached to the horizontal upper end openings of the intake ducts 21 and 22. The outside air introduced into the interior 6 through the intake air filters 31 and 32 rises between the power supply unit 7 and the back surface of the light-emitting display unit 3.

  In the upper end portion 6a of the interior 6 of the apparatus housing 2, there are formed natural ventilation exhaust ducts 23 and 24 for guiding the air in the interior 6 obliquely downward toward the natural exhaust holes 13 and 14. Exhaust-side air filters 33 and 34 are attached to the horizontal upper end openings of the exhaust ducts 23 and 24. Shutter valves 41 and 42 for opening and closing the exhaust ducts 23 and 24 are attached below the exhaust side air filters 33 and 34. The exhaust fan 8 is located below the exhaust ducts 23 and 24 for natural ventilation, and the air inside the exhaust 6 is forcibly exhausted by the exhaust fan 8 below the exhaust fan 8 (exhaust side). Exhaust ducts 25 and 26 for forced ventilation that lead obliquely downward toward the forced ventilation holes 15 and 16 are formed.

  Here, a temperature sensor 9 is disposed at the upper end portion 6 a of the inside 6 of the apparatus housing 2. When the temperature detected by the temperature sensor 9 exceeds a predetermined set value, the exhaust fan 8 is turned on, and in conjunction with this, the shutter valves 41 and 42 are closed and the natural ventilation exhaust ducts 23 and 24 are blocked. It has become. When the temperature detected by the temperature sensor 9 becomes lower than the set value, the exhaust fan 8 is turned off, and the shutter valves 41 and 42 are opened in conjunction with this, so that the automatic ventilation exhaust ducts 23 and 24 return to the communication state. It has become.

  Next, with reference to FIGS. 3, 4 and 5, the structure of the electric display unit 3 will be briefly described. The electro-optical display unit 3 has a rectangular outline shape that is slightly larger than the rectangular openings 121 in the vertical 8 rows and the horizontal 4 rows formed on the front surface of the apparatus housing 2. In addition, for example, light emitting through holes 131 having 16 columns and 6 rows are formed on the front surface of the electric display unit 3. From each light emitting through hole 131, three LEDs 132 (1) to 132 (3) arranged vertically are exposed. The LEDs 132 (1) to 132 (3) are a red light emitting LED, a green light emitting LED, and a blue light emitting LED, and are capable of full color display.

  The electro-optical display unit 3 includes a unit case that includes a rectangular frame-shaped case 133 that opens in the front-rear direction and a front panel 134 that is attached to the front surface of the frame-shaped case 133. In the front panel 134, vertically long through holes 131 for light emission are formed in a matrix. On the back side of the front panel 134, an LED substrate 135 on which LED groups of three LEDs 132 (1) to 132 (3) are mounted in a matrix is arranged, and each LED group corresponds to each of the front panel 134. It is exposed forward from the through hole 131 for light emission.

  A rectangular frame-shaped back plate portion 133a is integrally formed on the back surface of the frame-shaped case 133 along the four peripheral edges thereof, and the rectangular frame-shaped projecting portion extends from the inner peripheral edge of the back plate portion 133a toward the back surface side. 133b protrudes at a right angle. The protrusion 133b is dimensioned to be inserted into the rectangular opening 121 of the apparatus housing 3. Two vertical ribs 133c are integrally formed with the protruding portion 133b. In addition, a rectangular frame-shaped recess is formed on the back surface of the back plate portion 133a, and a rectangular frame plate 136 (see FIG. 5B) that is detachably attached to the back plate portion 133a is sandwiched between the rectangular frame-shaped back plate. The portion 133 a is fixed to the vertical frame portion 122 and the horizontal frame portion 123 that surround the rectangular opening 121 in the apparatus housing 3.

  On the surface of the front panel 134, slightly protruding vertical ribs 134 a are formed between the light emitting through holes 131. In addition, a flange plate 134b extending horizontally in the horizontal direction is formed at an upper position of each light emitting through hole 131.

  In the electro-optical display device 1 having this configuration, the shutter valves 41 and 42 are normally open and are in a natural ventilation state. It is also possible to close the shutter valves 41 and 42 when the electronic display device 1 is off, and to open the shutter valves 41 and 42 when the electronic display device 1 is switched on.

  Immediately after the light-emitting display device 1 starts the display operation, the internal temperature is lower than the set temperature, the exhaust fan 8 is off, and the natural ventilation exhaust ducts 23 and 24 are in communication. Therefore, as shown in FIG. 2A, the lower intake holes 11 and 12 pass through the intake ducts 21 and 22 and the intake air filters 31 and 32 to reach the inside 6 of the apparatus housing 3. And a natural ventilation path is formed from the upper end portion 6a through the exhaust air filters 33 and 34, through the exhaust ducts 23 and 24, and then to the outside through the natural exhaust holes 13 and 14. The introduction of the outside air and the discharge of the high-temperature air inside are efficiently performed through this natural ventilation path, and the internal temperature of the apparatus housing is suppressed from exceeding the set temperature.

  When the internal temperature exceeds the set temperature, the exhaust fan 8 is switched on. In conjunction with this, the shutter valves 41 and 42 are closed, and the natural ventilation exhaust ducts 23 and 24 are blocked. As a result, the natural ventilation path is blocked, and, as shown in FIG. 2 (b), through the intake ducts 21 and 22 and the intake air filters 31 and 32 from the lower intake holes 11 and 12, Forced ventilation path that reaches the inside 6, rises inside 6, passes through the exhaust fan 8 from the upper end portion 6 a, and passes from the exhaust ducts 25 and 26 for forced ventilation to the outside through the forced ventilation holes 15 and 16. Is formed. The exhaust fan 8 performs forced ventilation in which the sucked outside air is discharged through the inside 6, and the high-temperature air in the inside 6 is efficiently discharged.

  As described above, since the natural ventilation path that does not pass through the exhaust fan 8 is formed in the electronic display device 1, natural ventilation is efficiently performed through this path, and the internal temperature is suppressed from becoming high. Therefore, unlike the prior art, the internal temperature immediately becomes high after startup and forced ventilation by the exhaust fan 8 is not started, and the operation time of the exhaust fan 8 can be shortened.

  Therefore, the exhaust fan 8 can be prevented from falling into a state in which the exhaust fan 8 must be operated at all times, so that the life of the exhaust fan 8 is extended and the long-term use thereof becomes possible. Moreover, since the amount of dirty outside air forcedly sucked by the exhaust fan 8 and the amount of high humidity outside air during bad weather can be reduced, the probability of failure of internal electronic components can be reduced. Furthermore, since the occurrence of clogging of the intake side and exhaust side air filters can be suppressed, the frequency of cleaning and replacement of the air filters can be reduced. Furthermore, since exhaust heat is efficiently performed by natural ventilation and forced ventilation, it is possible to surely prevent a decrease in life due to temperature failure of internal electronic components.

(a) And (b) is the external appearance perspective view and back view of the electroluminescent display apparatus to which this invention is applied. (a) And (b) is a schematic longitudinal cross-sectional view at the time of the natural ventilation and the forced ventilation in the light-emitting display apparatus of FIG. 1, respectively. It is explanatory drawing which shows the state which removed the lightning display unit from the lightning display apparatus of FIG. (a)-(c) is the front view, top view, and longitudinal cross-sectional view which show an electroluminescent display unit. (a) And (b) is the perspective view at the time of seeing a light-emitting display unit from the front side, and the perspective view at the time of seeing from the back side. It is explanatory drawing which shows the exhaust structure of the conventional electroluminescent display apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric light display apparatus 2 Apparatus housing 3 Electric light display unit 4, 5 Open / close door 6 Inside 61a Upper end part 7 Power supply part 8 Exhaust fan 9 Temperature sensor 11, 12 Intake hole 13, 14 Natural exhaust hole 15, 16 Forced ventilation hole 21, 22 Intake ducts 23, 24 Exhaust ducts 25, 26 for natural ventilation Exhaust ducts 31, 32 for forced ventilation Intake air filters 33, 34 Exhaust air filters 41, 42 Shutter valve 121 Rectangular opening 122 Vertical frame 123 Horizontal frame 131 Through-holes for light emission 132 (1) to 132 (3) LED
133 Frame-shaped case 133a Back plate portion 133b Protruding portion 133c Vertical rib 134 Front panel 134a Vertical rib 134b Cover plate 135 LED base plate 136 Rectangular frame plate

Claims (7)

An apparatus housing, an electroluminescent display unit that is attached to the front surface of the apparatus housing and in which light emitting elements such as LEDs are arranged, and an exhaust fan for releasing heat generated inside the apparatus housing In an electro-optical display device having
An air intake hole formed in a lower end portion of the side surface or the back surface of the device housing;
A natural exhaust hole formed in the upper end portion of the side surface or the back surface of the device housing;
A forced ventilation hole formed in a portion below the natural exhaust hole on the side surface or the back surface of the device housing;
An electro-optical display device comprising: an open / close member that opens and closes the natural exhaust hole. The electric display device according to claim 1,
An intake air introduction part for guiding outside air introduced into the inside of the device housing from the intake hole upward;
A natural ventilation exhaust deriving section for guiding the air inside the apparatus housing downward from the upper end portion of the apparatus casing toward the natural exhaust hole;
A forced ventilation exhaust deriving portion for guiding the air inside the apparatus housing downward toward the forced ventilation hole through the exhaust fan disposed on the lower side of the exhaust deriving portion;
The light-emitting display device, wherein the opening / closing member opens and closes the exhaust vent for natural ventilation. The electric display device according to claim 2,
An intake air filter disposed in the intake air inlet;
An electroluminescent display device comprising: an exhaust air filter disposed in the natural ventilation exhaust lead-out portion. In the electroluminescent display device according to claim 3,
The device housing has a flat rectangular parallelepiped shape,
The light emitting display device, wherein the air intake hole, the forced ventilation hole, and the natural exhaust hole are formed on a rear surface of the apparatus housing. The electric display device according to claim 1,
The electronic display device, wherein the opening / closing member closes the natural ventilation hole when the exhaust fan is turned on and opens the natural ventilation hole when the exhaust fan is turned off. The electric display device according to claim 5,
It has a temperature sensor arranged at the upper end part inside the device casing,
The electric display device according to claim 1, wherein the exhaust fan switches to an on state when a temperature detected by the temperature sensor exceeds a predetermined set value, and returns to an off state when the detected temperature falls below a set value. The electric display device according to claim 5,
In the state in which the light-emitting display device is off, the natural ventilation hole is closed by the opening and closing member, and when the light-emitting display device is turned on, the opening and closing member opens the natural ventilation hole. apparatus.

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