JP5434713B2 - Heat dissipation unit and electronic device using the same - Google Patents

Description

  The present invention relates to a heat dissipating unit used for an electronic device installed outdoors, for example, and an electronic device incorporating the same.

  In an electronic device such as a television receiver, a display unit is provided on the front side of the main body case, and a control unit of the display unit is provided inside the main body case, and the rear side of the control unit is covered with a partition plate. It was.

  In some cases, the electronic device is used by being suspended from a ceiling (for example, Patent Document 1).

JP-A-7-322172

  In recent years, the display portion of a television receiver has become extremely large. Therefore, efforts to install it outdoors as an advertising device using the high display effect have been activated.

  In this case, in order to use it outdoors, it is necessary to take a sealed structure so that water does not enter the main body case. For this reason, the back side of the main body case is sealed with a partition plate.

  However, if such a sealed structure is adopted, the display unit and the control unit cannot sufficiently dissipate heat.

  Therefore, conventionally, the partition plate provided on the rear side of the main body case is made of metal, and a plurality of metal fins are provided outside the partition plate. In this state, the air in the main body case is stirred by a blower. Was configured.

  In other words, the air in the main body case is agitated with a blower, so that the heat in the main body case is first transferred to the fins and partition plates in the main body case, and then the heat conduction of the partition plates causes the fins outside the main body case. Then, heat is dissipated from the fins outside the main body case to the outdoor air.

  However, such a heat dissipation structure, that is, a structure in which a plurality of metal fins are provided outside the metal partition plate, as is well known, becomes extremely heavy. John's receiver itself is also heavy, and as a result, it is not preferable for installation at high altitudes outdoors.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the weight of a heat dissipation unit and an electronic device using the same.

  In order to achieve this object, the heat radiating unit of the present invention is mounted on one surface of an electronic device having a flat plate-like heating element, and a partition plate that partitions the inside and the outside of the electronic device, and the partition A heat exchanger disposed on the outside of the electronic device of the plate and a blower disposed on the inner side of the electronic device of the partition plate, the partition plate having an upper opening in the lateral direction above and below The heat exchanger has a configuration in which the upper opening and the lower opening are connected to each other in a bridge shape in the vertical direction by a hot air passage on the outside of the electronic device of the partition plate. On the inner side of the electronic device, air passing through the hot air passage body is passed through the upper opening and the lower opening to the front side and the back side of the heating element above and below the heating element, respectively. A suction member and a blowing member It is intended to achieve the intended purpose by Les.

  The heat dissipating unit of the present invention is mounted on one surface of an electronic device having a heating element on a flat plate, and is arranged on the outside of the electronic device with the partition plate separating the inside and the outside of the electronic device. A heat exchanger and a blower disposed on the inner side of the electronic device of the partition plate, the partition plate having an upper opening in the lateral direction above and a lower opening in the lateral direction below. The heat exchanger has a configuration in which the upper opening and the lower opening are connected in a bridge shape in a vertical direction by a hot air passage body on the outside of the electronic device of the partition plate, and on the inner side of the electronic device, The upper opening and the lower opening are each provided with a suction member and a blowing member for circulating the air that has passed the hot air passage body to the front side and the back side of the heating element at the upper and lower sides of the heating element, respectively. So, the heat dissipation unit and Les it is possible to reduce the weight of an electronic apparatus using the.

  That is, in the present invention, the heat inside the electronic device is arranged on the outside of the electronic device by the blower of the blower, without providing the heat dissipation fins for heat dissipation measures up to the inside of the electronic device as in the prior art. Since it can be moved to the heat exchanger and can be effectively dissipated, it is possible to reduce the weight of the heat dissipating unit and the electronic equipment using it.

The perspective view which shows the example of installation of Embodiment 1 of this invention Perspective view of the back side Exploded perspective view of the back side Side sectional view showing configuration and air path of electronic device ((a) Diagram showing air path inside electronic device (b) Diagram showing air path outside warm air passage body) The figure which shows the detail of the suction combined fluid and the blowout part fluid part Diagram showing the arrangement of the fan divider The figure which shows the natural convection wind channel by the same installation state ((a) figure at the time of horizontal installation, (b) figure at the time of vertical installation) The figure which shows the air path inside the electronic device of Embodiment 2 of this invention.

  A heat dissipation unit according to claim 1 of the present invention is mounted on one surface of an electronic device having a flat plate-like heating element, and partitions the interior and exterior of the electronic device, and the electronic device of the partition plate A heat exchanger disposed on the outer side of the electronic device and a blower disposed on the inner side of the electronic device of the partition plate, wherein the partition plate is open upward in the lateral direction above and downward in the lateral direction below the partition plate. The heat exchanger has a configuration in which the upper opening and the lower opening are connected to each other in a longitudinally bridging manner by a hot air passage body on the outside of the electronic device of the partition plate; On the inner side, the upper opening and the lower opening are each provided with a suction member and a blow-out member that circulate the air that has passed the hot air passage body to the front side and the back side at the upper end and the lower end of the heating element, respectively. Have

  As a result, air that has radiated heat through the hot air passage body is caused to flow from the lower side of the heating element to the front side and the rear side by the blowing member, and air containing heat generated from the heating element is sucked in from the upper side of the heating element. Since the member can flow again to the hot air path body and the heat of the heating element can be released to the outside air, it is possible to provide a heat dissipation unit that can efficiently release heat and reduce the size and weight. Play.

  According to a second aspect of the present invention, the suction member and the blowout member each have a suction opening and a blowout opening, and the suction opening is provided with a blower and is connected to the upper opening, and the blowout opening is connected to the lower opening. It has the structure of having been made.

  As a result, the air in the electronic device is sent from the suction opening to the hot air passage body through the upper opening by the action of the blower, and the air in the hot air passage is sent again from the outlet opening into the electronic device through the lower opening. Therefore, the heat in the electronic device can be sent to the warm air passage body and can be radiated to the outside air.

  Moreover, the heat radiating unit according to claim 3 has a configuration in which the blower pushes air from the suction opening side toward the upper opening.

  Thus, the blower sends air in the electronic device from the suction opening to the warm air passage body through the upper opening, and the air in the hot air passage body is sent again from the blowout opening into the electronic device through the lower opening. Thus, the heat in the electronic device can be sent to the warm air passage body and can be radiated to the outside air. In particular, since air is pushed into the hot air passage, air can be sent to every corner by applying pressure to the hot air passage, and the heat dissipation effect can be improved.

  According to a fourth aspect of the present invention, in the heat dissipation unit, the suction member extends from the front surface side of the heating element to the upper side of the heating element and communicates with the upper side of the heating element. It has the structure of having the suction confluence | merging plate which joins the said 1st air path and the 2nd air path to the inlet of a blower by the 2nd air path connected, and the inlet of a blower.

  As a result, the suction member joins the air on the front side and the back side of the heating element by joining the first air path and the second air path at the suction port of the blower by the suction confluence plate, and the air on the front side is merged. The upper end of the heating element can be pulled out to the back side, and the air in the electronic device can be blown from the upper opening into the warm air passage.

  According to a fifth aspect of the present invention, in the heat dissipation unit, the blowout member is directed upward into the electronic device from the front side of the heating element to the lower side of the rear side of the heating element and from the front side to the lower side of the heating element. It has the structure of having the 4th wind path which connects, and the blowing diverting plate which shunts air from the downward opening to these 3rd wind path and 4th wind path.

  As a result, the blowing member diverts the air blown out from the warm air passage body that has flowed in from the blowout opening by the blowout diverting plate into the third air passage and the fourth air passage, and passes the air from the lower end of the heating element to the front side. As a result, the air can be blown from the lower side to the upper side in the electronic device.

  Further, in the heat dissipating unit according to claim 6, the blowout diverting plate is configured to vary the blowout opening to a predetermined opening area ratio, and the opening area communicating with the fourth air passage is more than the opening area communicating with the third air passage. Has a large arrangement.

  This increases the air flow on the back side compared to the front side of the heating element to dissipate more heat inside the electronic device, and also sends air to the control device provided on the back side of the heating element. It is possible to release the heat by flowing air through the entire electronic device.

  According to a seventh aspect of the present invention, in the heat dissipation unit, the suction member includes a heating element front surface temperature sensor and a heating element rear surface temperature in an air passage communicating with the front surface side of the heating element and an air passage communicating with the rear surface side of the heating element. It has a configuration that includes a sensor.

  Thereby, the air volume of a blower can be adjusted with the temperature of the front side and back side of a heat generating body.

  Moreover, the heat radiating unit according to claim 8 has a configuration in which a plurality of blowers arranged side by side and a fan partition plate are provided between the blowers and the blower in the suction opening.

  Thus, by arranging a plurality of blowers, the fans can be arranged thinly and horizontally, and the fan partition plate can eliminate interference between adjacent blowers and increase the amount of blown air.

  The heat dissipation unit according to claim 9 has a configuration in which the warm air passage body forms a plurality of longitudinal air passages parallel to the inside and outside at predetermined intervals to bridge the upper opening and the lower opening. .

  Thereby, the heat-transfer area of a warm air path body can be enlarged, and the thermal radiation effect can be improved.

  The heat dissipation unit according to claim 10 has a configuration in which a first ventilation path is provided along the warm air path body between the outer upper ventilation hole and the lower ventilation hole.

  Thereby, the air can naturally rise in the first ventilation path along the warm air path body outside the heat exchanger, and heat can be radiated.

  Further, in the heat dissipating unit according to claim 11, the warm air passage body includes a second air passage that intersects the direction of the first air passage between the partition plate between the outer upper air vent and the lower air vent. It has the structure which provided the ventilation path.

  Thereby, air can also rise naturally in a 2nd ventilation path along a partition plate between a partition plate and a warm air path body on the outer side of a heat exchanger, and can also thermally radiate.

  Further, in the electronic device according to claim 12, the heating element is a display unit provided on the front side, and the back side of the main body case in which the display unit and the control unit for the display unit are provided on the back side of the display unit, respectively. In addition, an opening is provided, and in this opening, the heat radiating unit is arranged such that the hot air path body of the heat radiating unit is on the outer surface side of the main body case.

  This makes it possible to dissipate the heat generated from the display unit and the control unit in the electronic device to the outside air with the heat dissipation unit provided on the back side of the main body case, and efficiently reduce the size and weight of the electronic device. There is an effect that can be provided.

  Hereinafter, the present embodiment will be described with reference to the drawings.

(Embodiment 1)
In FIG. 1, a display device 1 used as an example of an electronic device can display advertisements in addition to a function as a television receiver.

  Therefore, in FIG. 1, the display device 1 is installed under the eaves 3 of the store 2, that is, outdoors, and the horizontally long display unit 5 is exposed in the outdoors.

  As shown in FIG. 2, the display device 1 includes a back cover 4 having air permeability by a mesh or lattice structure on the back.

  As shown in FIG. 3, the display device 1 includes a display unit 5 disposed on the front surface of the display device 1 and a control unit 6 that adjusts the brightness and video of the display unit disposed on the back side of the display unit. I have. And these are stored in the inside of the display apparatus 1 so that watertightness may be maintained with respect to external air.

  A heat radiating unit 7 is provided inside the back cover 4 on the back surface of the display device 1. The heat radiating unit 7 divides and covers a back opening 8 provided on the back of the display device 1 main body into one unit or a plurality of units.

  The heat radiating unit 7 is located at the upper end inside the partition plate 9, the partition plate 9 that is a metal plate that closes the back opening 8 from the outside, the heat exchanger 9 a disposed outside the partition plate 9, and the partition plate 9. The blower 11, the suction member 12 to which the blower 11 is attached, and the blowout member 13 disposed at the lower end inside the partition plate 9 are configured.

  The partition plate 9 has an upper opening 14 and a lower opening 15 as horizontally long openings at the upper end and the lower end, respectively. In addition, the heat exchanger 9 a is configured such that the upper opening 14 and the lower opening 15 are connected in a longitudinal bridge shape by the hot air passage body 10 on the outside of the electronic device of the partition plate 9. And it is a vertically long U-shaped hollow body facing the upper opening 14 and the lower opening 15 with the upper end and the lower end bent in the horizontal direction, and a synthetic resin such as polystyrene resin is thinly molded. Formed. That is, the warm air passage body 10 connects the upper opening 14 and the lower opening 15 of the partition plate 9 on the outside of the partition plate 9.

  As shown in FIG. 3, the warm air passage body 10 forms a plurality of vertical air passages parallel to the inside and outside at predetermined intervals, and bridges the upper opening 14 and the lower opening 15. is there.

  That is, as shown in FIG. 4B, the warm air passage body 10 forms a first ventilation passage 10a along the hot air passage body between the upper opening 14 and the lower opening 15 on the outside. Further, the warm air passage body 10 is a hollow body as described above, and the third air passage 10c is formed therein. Further, the warm air passage body 10 has a second air passage 10b that intersects the partition plate 9 with respect to the direction of the first air passage 10a between the upper opening 14 and the lower opening 15 on the outer side. Form.

  In addition, the blower 11 is arranged above the display device 1 so that air is pushed from the upper opening 14 toward the inside of the warm air passage body 10. As shown in FIG. 3, the blower 11 has a plurality of thin axial fans 11 a arranged in the horizontal direction in accordance with the upper opening 14. As shown in FIG. 6, the adjacent axial fans 11a are separated from each other by a fan partition plate 11b.

  Further, the suction member 12 and the blowout member 13 are arranged on the inner side of the partition plate 9 toward the inside of the display device 1. The suction member 12 and the blowing member 13 are on the inner side of the partition plate 9, and the suction junction plate 17 and the blowing diversion flow inside so that air flows through both sides of the upper and lower ends of the plate-like heating element 16. And a plate 18.

  The display device 1 includes the display unit 5 as described above. The display unit 5 includes a protective glass 19 and a plasma backlight unit 20 that is a heating element 16 from the front side of the display device 1. The protective glass 19 and the plasma backlight unit 20 are held in parallel by a frame body 20a at a predetermined interval from the side surface. Further, the frame 20 a forms a display unit ventilation path 21, which is a ventilation path having an upper end and a lower end, between the protective glass 19 and the plasma backlight unit 20. The upper end opening is referred to as a display unit upper opening 22, and the lower end opening is referred to as a display unit lower opening 23.

  The protective glass 19 faces the surface of the display device 1 and protects the plasma backlight unit 20.

  As described above, the display unit ventilation path 21 is formed in the display unit 5 between the protective glass 19 and the plasma backlight unit 20. As shown in FIG. 4A, the display unit ventilation path 21 has a display unit lower opening 23 that extends beyond the lower end of the plasma backlight unit 20 to the blowing member 13 on the back side, and the display unit upper opening 22 has plasma. The upper end of the backlight unit 20 is communicated with the suction member 12. Then, the blower 11 communicates from the upper opening 14 of the partition plate 9 to the lower opening 15, the blowing member 13, and the display unit lower opening 23 through the third ventilation path 10 c inside the warm air passage body 10. The first circulation air passage 24 communicates with the first circulation air passage 24.

  Further, the suction member 12 and the blowout member 13 are arranged with a suction opening 25 and a blowout opening 26 facing each other on the back side of the heating element 16 by dividing the display portion ventilation path 21 by the suction junction plate 17 and the blowout diverting plate 18, respectively. ing. Thereby, the back side of the heating element 16 is circulated from the suction opening 25 through the blower 11 to the lower opening 15 and the blowout opening 26 through the inside of the upper opening 14 and the warm air passage body 10. 27.

  That is, the suction member 12 has a first air passage 12a that communicates from the front side of the heat generating body 16 to the upper side of the back surface beyond the upper end, and a second air that communicates downward into the electronic device on the back side of the heat generating body 16. A suction merging plate 17 is provided to join the first air passage 12a and the second air passage 12b to the air inlet of the air blower 11 at the air inlet of the air passage 12b and the air blower 11. The blowing member 13 has a third air passage 13a that communicates from the front side of the heat generating body 16 to the lower side of the back surface beyond the lower end, and a fourth air that communicates upwardly on the back side of the heat generating body 16 into the electronic device. A passage 13b and a blowout diverting plate 18 for diverting air from the lower opening 15 to the third air passage 13a and the fourth air passage 13b are provided. The first air passage 12 a and the third air passage 13 a communicate with the display unit air passage 21. The second air passage 12b and the fourth air passage 13b face each other and allow air to flow to the back side of the heating element 16. And the control part 6 is arrange | positioned in the position where these 2nd air paths 12b and the 4th air paths 13b oppose.

  Further, as shown in FIG. 5, the blowout diverting plate 18 is configured to vary the diversion ratio with respect to the blowout opening 26, that is, to be configured to vary the blowout opening 26 to a predetermined opening area ratio, and to the third air passage 13a. The area of the first opening 26a that communicates with the fourth air passage 13b is larger than the area of the second opening 26b that communicates with the fourth air passage 13b.

  According to such a configuration, when the display device 1 is driven and the display unit 5 is turned on, the plasma backlight unit 20 and the circuit components in the control unit 6 generate a large amount of heat.

  That is, in the display device 1 intended for such outdoor people, it is necessary to increase the light emission luminance of the display unit 5 as compared with the display of the indoor television receiver, and a very large amount of electric power and a large amount of heat associated therewith are required. Will occur. Further, since the display device 1 is used outdoors, the front surface is covered with a protective glass 19 and the back surface is covered with the heat radiating unit 7 so that dust and rainwater can be prevented from entering, and the inside of the display device 1 is hermetically sealed. In this state, the display device 1 has a configuration in which very large heat is accumulated.

  Therefore, when display is started on the display unit 5, the blower 11 is driven, and the air above the control unit 6 is pushed into the hot air passage body 10 from the upper opening 14 into the display device 1, and below the lower opening 15. Are again blown into the display device 1.

  Further, the air blown into the display device 1 is diverted into the third air passage 13a and the fourth air passage 13b by the blow-off flow dividing plate 18 of the blow-out member 13. The air diverted to the third air path 13a flows in from the lower side of the plasma backlight unit 20 to the front side, passes through the display unit ventilation path 21 on the front side of the plasma backlight unit 20, and passes through the first air path 13a. It flows into the air passage 12 a, flows from the upper side to the back side of the plasma backlight unit 20, is sucked into the suction member 12, and is sucked by the blower 11 by the action of the suction diverter plate 17. Further, the air diverted to the fourth air passage 13b passes through the back side of the plasma backlight unit 20, passes through the control unit 6, communicates with the second air passage 12b, and is sucked by the suction confluence plate 17 of the suction member 12. , Guided to the blower 11 and sucked.

  That is, the air in the display device 1 is forcibly sent into the warm air passage body 10 by the action of the blower 11, passes through the third air passage 10c, and the first circulation air passage 24 and the second circulation. The air path 27 is circulated. Thereby, the heat generated from the inside of the display device 1 passes through the first circulation air passage 24 and the second circulation air passage 27 and is transmitted into the warm air passage body 10. On the back side of the display device 1, by providing a mesh or lattice structure on the back cover 4, natural convection occurs outside the warm air passage body 10 due to the chimney effect, and as shown in FIG. Air rises through the first ventilation path 10a, and the internal heat is released to the outside air through the resin plate that forms the warm air path body 10. In this way, heat in the display device 1 is released to the outside air.

  As described above, in the present embodiment, the heat of the display unit 5 and the control unit 6 confined in the display device 1 is conveyed to the outside of the display device 1 by the heat radiating unit 7 and is effectively cooled by the outside air. It will be.

  And since the warm air path body 10 of the heat radiating unit 7 is formed of a synthetic resin and is provided only outside the partition plate 9 provided on the back surface of the display device 1, the weight can be reduced.

  Further, the blowout diverting plate 18 is configured to vary the blowout opening 26 to a predetermined opening area ratio, and the area of the second opening 26b communicating with the fourth air passage 13b is the first opening 26a communicating with the third air passage 13a. Since it is configured to be larger than the area, heat on the front side of the plasma backlight unit 20 is dissipated by the air flowing toward the third air passage 13a, and more air flows toward the fourth air passage 13b. In addition, heat can be released from the back side of the plasma backlight unit 20 and the control unit 6 disposed on the back side at the same time, and heat can be efficiently radiated even when the amount of heat generated differs between the parts and the size of the display device 1 is different. can do.

  Further, the fan partition plate 11b prevents the airflow caused by the rotation of the adjacent axial fans 11a from interfering with each other, so that air can be reliably sent to the third ventilation path 10c. Can be efficiently dissipated.

  Thereby, air can be flowed in the whole display apparatus 1, and the heat can be radiated.

  As described above, when the display device 1 is installed horizontally, the warm air passage body 10 can release heat by raising the air through the first ventilation passage 10a. However, depending on the display content, the display device 1 may be installed vertically as shown in FIG. That is, the display device 1 may be installed and used in a state rotated by 90 degrees. In this case, natural convection occurs in the second ventilation path 10b formed between the partition plate 9 and the warm air path body 10, and air rises and flows in the second ventilation path 10b.

  In this way, in the heat dissipation unit of the present embodiment, the same heat dissipation effect can be obtained regardless of the installation direction regardless of whether the display device 1 is installed vertically or horizontally.

(Embodiment 2)
As described above, the present invention has been described. In the second embodiment, in order to radiate heat from the heating element 16 more reliably, the suction member 12 is provided on the front side of the heating element 16 as shown in FIG. A heating element front surface temperature sensor 30 and a heating element rear surface temperature sensor 31 are respectively provided in the communicating air path and the air path communicating with the back side of the heating element. The same parts as those in the first embodiment are denoted by the same reference numerals for easy understanding, and the description thereof will be simplified.

  That is, the heating element front surface temperature sensor 30 is provided in the first air passage 12a, and the heating element rear surface temperature sensor 31 is provided in the second air passage 12b.

  With such a configuration, the blower 11 can increase the air volume when at least one of the temperatures becomes higher than a predetermined temperature according to the detected temperatures of the heating element front surface temperature sensor 30 and the heating element rear surface temperature sensor 31. The heat in the display device 1 can be reliably radiated.

  Further, as shown in FIG. 3, the heat dissipating unit 7 is divided into a plurality of units, so that the axial flow fan 11a is operated and stopped or the air volume is controlled by the temperature distribution of the heating element 16, thereby displaying the display device. The heat in 1 can be finely radiated. That is, the minimum necessary heat radiating unit 7 is provided and heat can be efficiently radiated. Further weight reduction can be realized.

(Embodiment 3)
As described above, the basic configuration of the present invention has been described. In the third embodiment, as shown in the first embodiment, a configuration that exhibits an effect when the heating element 16 is the plasma backlight unit 20 will be described. To do. The same parts as those in the first embodiment are denoted by the same reference numerals for easy understanding, and the description thereof will be simplified.

  In the configuration of the first embodiment, the blower 11 is located farthest from the display unit lower opening 23 of the plasma backlight unit 20, that is, in the display device 1, and the blower 11 and the display unit lower opening 23 are diagonal. It is arranged. Further, the blower 11 is configured to blow air directly into the hot air passage body 10 formed of a synthetic resin typified by polystyrene resin through the upper opening 14.

  With such a configuration, the air circulating through the first circulation air passage 24 and the second circulation air passage 27 collides with the hot air passage body 10 formed of a synthetic resin typified by polystyrene resin by the action of the blower 11. The warm air passage body 10 can absorb the dust in the electronic equipment mixed with the flowing air by charging the upper bent portion 32 of the U-shaped upper portion shown in FIG. Will be.

  That is, the upper bent portion 32 can be attracted to attract dust in the electronic device, so that the display portion ventilation path 21 is formed and the plasma backlight portion 20 is formed as in the present embodiment. Even if air is flowed over the surface of the screen, dust and debris will not adhere to the display screen, and beautiful images can be displayed.

  As described above, the heat dissipating unit of the present invention is mounted on one surface of an electronic device having a flat plate-like heating element, and partitions the interior and the exterior of the electronic device, and the partition plate external to the electronic device. A heat exchanger arranged on the side and a blower arranged on the inner side of the electronic device of the partition plate, the partition plate having an upper vent in the lateral direction above and a lower opening in the lateral direction below The heat exchanger has a configuration in which the upper opening and the lower opening are connected in a bridge shape in the longitudinal direction by a hot air passage body on the outside of the electronic device of the partition plate, and the interior of the electronic device On the side, the upper opening and the lower opening are respectively provided with a suction member and a blowing member for circulating the air that has passed the hot air passage body to the front side and the back side of the heating element at the upper and lower sides of the heating element, respectively. Because it is equipped with heat dissipation It is possible to reduce the weight of the knit and electronic apparatus using the same.

  That is, in the present invention, the heat inside the electronic device is arranged on the outside of the electronic device by the blower of the blower, without providing the heat dissipation fins for heat dissipation measures up to the inside of the electronic device as in the prior art. Since it can be moved to the heat exchanger and can be effectively dissipated, it is possible to reduce the weight of the heat dissipating unit and the electronic equipment using it.

  Therefore, it is widely used for outdoor type electronic devices.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Shop 3 Lower 4 Back cover 5 Display part 6 Control part 7 Radiation unit 8 Rear opening 9 Partition plate 9a Heat exchanger 10 Hot air path body 10a 1st ventilation path 10b 2nd ventilation path 10c 3rd Ventilation path 11 Blower 11a Axial fan 11b Fan partition plate 12 Suction member 12a First air path 12b Second air path 13 Blowing member 13a Third air path 13b Fourth air path 14 Upper opening 15 Lower opening 16 Heating element 17 Suction confluence Plate 18 Blow-out shunt plate 19 Protective glass 20 Plasma backlight section 20a Frame body 21 Display section ventilation path 22 Display section upper opening 23 Display section lower opening 24 First circulation air path 25 Suction opening 26 Blowing opening 26a First opening 26b Second Opening 27 Second circulation air passage 30 Heating element front surface temperature sensor 31 Heating element rear surface temperature sensor 32 Upper curved portion

Claims (12)

A partition plate that is mounted on one surface of an electronic device having a flat plate-like heating element and partitions the inside and the outside of the electronic device, a heat exchanger disposed on the outside of the electronic device of the partition plate, A blower disposed on the inner side of the electronic device of the partition plate, the partition plate having an upper opening in the lateral direction above and a lower opening in the lateral direction below the partition plate, On the outside of the electronic device of the partition plate, the upper opening and the lower opening are connected in a longitudinally bridging manner by a hot air passage body, and on the inner side of the electronic device, the upper opening and the lower opening are A heat dissipating unit comprising a suction member and a blow-out member that circulate the air that has passed through the hot air path body to the front side and the back side of the heating element at the upper and lower sides of the heating element, respectively. The heat radiating unit according to claim 1, wherein each of the suction member and the blowout member has a suction opening and a blowout opening, and the suction opening is provided with a blower and is connected to the upper opening, and the blowout opening is connected to the lower opening. The heat radiating unit according to claim 1, wherein the blower is configured to push air from the suction opening side toward the upper opening. The suction member includes a first air passage communicating from the front side of the heating element to the upper side of the rear side beyond the upper end, a second air path communicating downward in the electronic device on the rear side of the heating element, and suction of the blower The heat radiating unit according to claim 1, further comprising a suction junction plate that joins the first air path and the second air path to an air inlet of the blower at an opening. The blowing member includes a third air passage that communicates from the front side of the heating element to the lower side of the rear surface beyond the lower end, a fourth air passage that communicates upward in the electronic device on the rear side of the heating element, and a lower opening. The heat radiating unit according to claim 1, further comprising a blowout diverting plate for diverting air to the third air passage and the fourth air passage. The blowout diverting plate has a configuration in which a diversion ratio is variable with respect to the blowout opening, and an opening area communicating with the fourth air passage is set larger than an opening area communicating with the third air passage. Heat dissipation unit. The heat radiating unit according to claim 4, wherein the suction member includes a heating element front surface temperature sensor and a heating element rear surface temperature sensor for measuring temperatures in the first air path and the second air path, respectively. The heat radiating unit according to claim 1, wherein a plurality of blowers arranged side by side and a fan partition plate are provided between the blowers and the blower in the suction opening. The heat release according to any one of claims 1 to 8, wherein the hot air passage body forms a plurality of longitudinal air passages parallel to the inside and outside at predetermined intervals, and bridges the upper opening and the lower opening. unit. The heat radiating unit according to claim 9, wherein the warm air passage body is provided with a first air passage along the hot air passage body between the outer upper air vent and the lower air vent. The warm air passage body according to claim 9 or 10, wherein a second air passage that intersects the direction of the first air passage is provided between the partition plate and the outer air passage between the upper air vent and the lower air vent. The heat dissipation unit described. The heating element is a display unit provided on the front side, and an opening is provided on the back side of the main body case provided with the display unit and the control unit of the display unit on the back side of the display unit. An electronic device in which the heat radiating unit according to any one of claims 1 to 11 is disposed such that a hot air passage body of the heat radiating unit is on an outer surface side of the main body case.

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