JP5844708B2 - Air cooling mechanism installed in the housing - Google Patents

Description

  The present invention relates to an air cooling mechanism installed in a casing of a display panel that is installed in a railway station or the like and displays train arrival and departure times and operation status.

  2. Description of the Related Art Conventionally, display panels have been installed at various locations in stations, airports, and the like in order to notify users of train and airplane arrival and departure times and current operation conditions. A large display panel embedded in the wall can be seen at the airport, but on the station premises, there is a display panel that displays about two lines next to the user's passage slightly above the user's overhead. There are many cases.

  Since the display panel is an electronic device, it may cause various failures. There has been proposed a maintenance test apparatus for a guide display board having a maintenance test function for quickly performing a confirmation test after such failure of the display board. (For example, refer to Patent Document 1.)

JP 2000-132751 A

  By the way, although patent document 1 describes performing display operation confirmation after a failure, there is no description about the type of failure and the cause of the failure. Usually, the display panel is driven to emit light by a control device arranged inside a casing constituting the display panel.

  In recent years, light emitting elements such as LEDs (light emitting diodes) are used for display on the display panel. LEDs generate heat even though they consume less power. The control device that drives the LED to emit light also generates heat. Therefore, it is necessary to cool the inside of the casing constituting the display panel.

  Air cooling is used to cool electronic devices. Air cooling uses a fan to circulate the outside air through the intake and exhaust ports of the housing. By the way, since the control device is a precision electronic device, it dislikes dirt. If dirt such as dust adheres to the wiring of the control device, a fault such as a short circuit occurs.

  Therefore, conventionally, a sponge-like filter is provided inside the housing of the display panel, and when the outside air that has entered from the air inlet passes through the filter, the dust is allowed to flow in as a structure that filters the dust contained in the outside air through the filter. It is preventing.

  However, the dust in the outside air inside the railway station is mixed with iron powder and floating in addition to normal dust. Display panels for railway stations installed in the open air where there is a lot of iron powder tend to clog filters faster than display panels installed at locations other than the station. Cleaning or replacement work occurred frequently and was inefficient.

  The present invention solves the above-mentioned conventional problems, and is a filter for a display panel by removing iron powder in the outside air before passing through the filter in an air cooling structure of a display panel installed in a railway station or the like. An object of the present invention is to provide an air cooling mechanism for a display panel that reduces the clogging of the display panel and prolongs the life of the filter.

  In order to solve the above problems, an air cooling mechanism disposed in a housing according to the present invention includes an opening for taking outside air into the housing, and an outside air from the opening in the air cooling mechanism disposed in the housing. Air flow path into the inside of the housing, a filter for collecting dust, and an exhaust means for exhausting air from the housing to the outside of the housing, the air flow path, It is comprised so that it may have an iron powder removal means to remove iron powder.

  In the air cooling mechanism disposed in the housing, for example, the iron powder removing means includes a cylindrical body that forms a cavity inside, and an iron powder that is wound around the outer periphery of the cylindrical body. And a coil unit attached to the opening of the housing.

  Further, in the air cooling mechanism disposed in the housing, for example, the iron powder removing means has a circuit that stops magnetizing the coil unit when the exhaust means stops.

  In the air cooling mechanism disposed in the housing, for example, the coil unit is surrounded by a frame around the upper portion, and a partition plate is erected between the adjacent coil units inside the frame. The filter is arranged in a shape to be placed on the partition plate and the frame.

  The present invention is arranged in a display panel casing that is installed in a railway station premises or the like and contributes to prolonging the life of the filter by removing iron powder in the outside air before passing through the filter in the air cooling mechanism of the display panel. An installed air cooling mechanism can be provided.

(a) is the perspective view which looked at the display board which concerns on Example 1 of this invention from the slightly upper direction which opened the front opening-and-closing lid, (b) looked at the display board which also opened the front opening-and-closing lid from the slightly lower side. FIG. FIG. 3 is an exploded perspective view showing the coil unit and the filter removed from the opening of the housing of the display panel according to the first embodiment. It is a figure which shows the sub unit which forms the coil unit of the display panel which concerns on Example 1 with a filter. It is a circuit wiring diagram which drives the exhaust fan of the display panel which concerns on Example 1, and the coil of a coil unit. (a), (b) is a figure explaining operation | movement of the coil unit in the display panel which concerns on Example 1. FIG.

  Hereinafter, embodiments of the present invention will be described in detail.

  FIG. 1 (a) is a perspective view of the display panel according to the first embodiment of the present invention as seen from the top with the front opening / closing lid opened, and FIG. 1 (b) is also the front opening / closing lid opened. It is the perspective view which looked at the display board from the bottom a little.

  A display panel 1 shown in FIGS. 1 (a) and 1 (b) is a display panel disposed in a railway station or the like, and includes a casing 2 and a front opening / closing lid 4 having a display device 3 on almost the entire surface. I have. The casing 2 is supported at its upper portion by two cylindrical support portions 5 (5a, 5b) extending downward from a ceiling (not shown) in the station.

  The support unit 5 supports the housing 2 of the display panel 1 and also serves as an insertion path through which a signal line wired from the central management unit of the station and a power line wired from the power supply panel are inserted. The wiring inserted into the support portion 5 is drawn into the inside of the housing 2 from the lower end openings 5a-1 and 5b-1 of the support portion 5, and a number of display drive circuits and the like mounted on the substrate 6 on the inner back surface. Connected to the electronic component 7.

  On the upper surface 2-1 of the housing 2, air-cooling exhaust fans 8 are arranged at three locations, the central portion and both side portions, with the two support portions 5 interposed therebetween. By operating the exhaust fan 8, high-temperature air heated by the internal components from the inside of the housing 2 is discharged to the outside of the housing 2.

  The exhaust fan 8 is an example of an exhaust means, and is not limited to this. A large opening 9 is formed in the bottom surface 2-2 of the housing 2. When the exhaust fan 8 operates, the opening 9 takes in outside air from the opening 9 of the housing 2, and thereby cools the inside of the housing 2.

A coil unit 14 including a lower holding plate 11, an upper holding plate 12, a plurality of cylindrical bodies 13, and a coil 23 (not shown) are attached to the opening 9.
Here, the expression “cylindrical body 13” includes not only a columnar shape and a hollow inside, but also a hollow shape inside and a cross-sectional shape other than a circle. For example, the cross-sectional shape includes an ellipse, a polygon, and other shapes.

  On the upper part of the coil unit 14, a frame 18 described later in detail and a partition plate 19 inside the frame 18 are arranged, and a filter 15 made of a plate-like sponge body is arranged on the frame 18 and the partition plate 19. Yes. The cylindrical body 13 forms an air flow path for the outside air that flows in from the lower surface of the housing 2 by the exhaust fan 8, passes through the filter 15, and is discharged above the housing 2.

  That is, the lower opening of the cylindrical body 13 forms a flow path intake port, and the upper opening forms a flow path exhaust port. As shown in FIG. 1B, the lower holding plate 11 has a plurality of holding portion intake ports 16 formed at equal intervals, and the air flow path intake air of the tubular body 13 is formed in the holding portion intake ports 16. Mouth is connected.

  FIG. 2 is an exploded perspective view in which the coil unit 14 and the filter 15 are removed from the opening 9 of the housing 2. As shown in FIG. 2, the upper holding plate 12 has a plurality of holding portion exhaust ports 17 formed at equal intervals, and the airflow passage exhaust port of the cylindrical body 13 is connected to the holding portion exhaust ports 17. Yes.

  A frame 18 is stretched around the upper holding plate 12. Inside the frame 18, a partition plate 19 is disposed between the rows of the holding portion exhaust ports 17 arranged in series in one direction. The filter 15 is attached so as to be placed on the partition plate 19 and the frame 18.

  FIG. 3 is a view showing a child unit forming the coil unit 14 together with a filter. As shown in FIG. 3, the child unit 20 includes a child holding plate 21, a child holding plate 22, a cylindrical body 13, a cylinder arranged in series between the child holding plate 21 and the child holding plate 22. The coil 23 is wound around the outer periphery of the body 13.

  FIG. 3 shows a state in which the coil 23 is wound only on one cylindrical body 13 for the sake of simplicity, but in actuality, the coil 23 is wound on all the cylindrical bodies 13. It has been turned. The same applies to the cases of FIGS. 1A, 1B and 2 described above.

  That is, the coil unit 14 shown in FIGS. 1 (a), 1 (b) and 2 is a parent unit in which a plurality of child units 20 shown in FIG. is there. The lower holding plate 11 and the upper holding plate 12 shown in FIGS. 1 (a) and 1 (b) and FIG. 2 are arranged side by side with the lower holding plate 21 and the upper holding plate 22 of the child unit 20 after becoming the parent unit. Shows what was arranged.

  In FIG. 3, the filter 15 is shown as a plate-like sponge having the same area as that of the child unit 20, but after the child units 20 are arranged into a parent unit, FIGS. 1 (a), (b) and FIG. As shown, a frame 18 and a partition plate 19 may be attached, and a large filter 15 may be attached thereon.

  FIG. 4 is a circuit wiring diagram for driving the exhaust fan 8 of the display panel 1 and the coil 23 of the coil unit 14. In the configuration on the right side of FIG. 4, the same functional components as those shown in FIGS. 1 to 3 are given the same reference numerals as those in FIGS.

  As shown in FIG. 4, two power supply lines 26 of AC 100V and one FG (filament ground) line 27 are connected to the output terminal block 25 of the central control unit. The output terminal block 25 of the FG line 27 is connected to the noise filter 28.

  From the output terminal block 25 of the two power supply lines 26, the breakers 33 are connected in series and pass through the noise filter 28, and further, the fuses 29 are connected in series. It is connected to the input terminal block (the upper surface 2-1 of the housing 2, the support portions 5 a and 5 b) of the display panel 1.

  The two power lines 26 that enter the display panel 1 from the input terminal block of the display panel 1 are branched in two directions on the foremost side, and one branch line is wired to the power supply unit of the display device 3. The other branch line is converted into a DC power supply via the power supply unit 30 and then connected to the plurality of exhaust fans 8 and the plurality of coils 23, respectively.

  5A and 5B are diagrams for explaining the operation of the coil unit 14 in the display panel 1 having the above-described configuration. In FIGS. 4A and 4B, only one cylindrical body 13 and one coil 23 are shown for easy viewing. FIG. 5A shows a state where the breaker 33 is closed and the exhaust fan 8 and the coil 23 are energized.

  A positive side of the DC power source is connected to the upper lead terminal 23a of the coil 23, and a negative side of the DC power source is connected to the lower lead terminal 23b of the coil 23. In this energized state, the winding direction of the coil 23 is determined so that the upper part of the coil 23 is an N-pole electromagnet and the lower part is an S-pole electromagnet. The positional relationship between the N pole and the S pole may be reversed. Thereby, the cylindrical body 13 is magnetized by the influence of the coil current during energization.

  Since the exhaust fan 8 is driven at the same time as the coil 23 is energized, the outside air below the display panel 1 causes the holding portion intake port 16 of the lower holding plate 11, that is, the tubular body 13, as indicated by arrows a and b. The air is sucked in from the airflow path intake port of the upper holding plate 12 and exits from the holding portion exhaust port 17 of the upper holding plate 12, that is, from the airflow path exhaust port of the tubular body 13 and further passes through the filter 15.

  At this time, the iron powder 31 floating in the outside air is adsorbed on the south pole side below the coil 23 serving as an electromagnet, like the adsorbed iron powder 31a, before reaching the filter 15. The dust 32 other than the iron powder 31 passes through the cylindrical body 13 and is adsorbed by the filter 15 like the adsorbed dust 32a.

  As shown in FIG. 2, the space from the air flow path exhaust port of the cylindrical body 13 to the filter 15 is partitioned for each child unit 20 (see FIG. 3) by the frame 18 and the partition plate 19. The outside air from which 31 has been removed is efficiently led directly to the filter 15 from the air passage exhaust port of the cylindrical body 13 without causing turbulence.

  When air cooling is performed and the inside of the display panel 1 becomes a certain temperature or less, the energization is stopped. The exhaust fan 8 stops and the inflow of outside air stops. The adsorbed dust 32a adsorbed on the filter 15 is adsorbed on the filter 15 as it is.

  On the other hand, since the electromagnet function of the coil 23 disappears when the energization is stopped, the adsorbed iron powder 31a falls off from the coil 32 as a group as indicated by arrows c and d. If a saucer or the like is installed below the display panel 1, the dropped adsorbed iron powder 31a can be received and appropriately discarded.

  In the present embodiment, the control of the operation of the exhaust fan 8 and the control of magnetizing the cylindrical body 13 are controlled in conjunction with each other. It may be done individually.

Note that various modifications can be made to the above-described embodiment without departing from the gist of the embodiment.
Further, the above-described embodiments can be modified and changed by those skilled in the art, and are not limited to the exact configurations and application examples described.

  INDUSTRIAL APPLICABILITY The present invention can be used for an air cooling mechanism installed in a casing of a display panel that is installed in a railway station or the like and displays train arrival / departure times and operation status.

DESCRIPTION OF SYMBOLS 1 Display panel 2 Case 2-1 Upper surface 2-2 Bottom surface 3 Display device 4 Front opening / closing lid 5 (5a, 5b) Support pipe 5a-1, 5b-1 Lower end opening 6 Substrate 7 Electronic component 8 Exhaust fan 9 Opening Part 11 Lower holding plate 12 Upper holding plate 13 Tubular body 14 Coil unit 15 Filter 16 Holding part intake port 17 Holding part exhaust port 18 Frame 19 Partition plate 20 Child unit 21 Child lower holding plate 22 Child upper holding plate 23 Coil 25 Output Terminal block 26 Power line 27 FG (filament ground) line 28 Noise filter 29 Fuse 30 Power supply unit 31 Iron powder 31a Adsorbed iron powder 32 Dust 32a Adsorbed dust 33 Breaker

Claims (2)

In the air cooling mechanism arranged in the housing,
An opening for taking outside air into the housing;
An air flow path for allowing outside air from the opening to flow into the housing;
A filter for collecting dust,
An exhaust means for exhausting air from the housing to the outside of the housing;
The stream kilometers includes iron powder removing means for removing iron powder,
The iron powder removing means is
A cylindrical body whose inside forms a cavity;
A coil wound around the outer periphery of the cylindrical body and adsorbing iron powder to the cylindrical body;
A coil unit attached to the opening of the housing,
The coil unit is surrounded by a frame around the upper part, and a partition plate is erected between the adjacent coil units inside the frame, and is placed on the partition plate and the frame. The filter is arranged,
An air cooling mechanism disposed in a casing characterized by the above. The iron powder removing means has a circuit that stops magnetizing the coil unit when the exhaust means stops.
The air cooling mechanism disposed in the casing according to claim 1 .