JP2011014715A - Heat radiating unit and electronic component using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat radiating unit having a reduced weight which radiates the heat generated from inside an electronic component.SOLUTION: The heat radiating unit 17, having reduced weight, includes a partition plate 9 having an upper opening 13 and a lower opening 14; a blower 10 disposed on one side of the partition plate 9; and a heat exchanger 11 disposed on the other side of the partition plate 9. The heat exchanger 11 includes a vertical radiation air passage 21 formed between first and second superimposed synthetic resin plates, and a convection air passage 22 formed between second and third synthetic resin plates, with the first to third synthetic resin plates being disposed in a vertical direction and superimposed on each other in the horizontal direction. An upper opening 15 of the vertical radiation air passage 21 communicates with the upper opening 13 of the partition plate 9, and a lower opening 16 of the radiation air passage 21 communicates with the lower opening 14 of the partition plate 9, and thereby, a heat radiating structure of a unitized type is formed by using the partition plate 9, the heat exchanger 11 of the synthetic resin plates and the blower 10, which makes it possible to reduce the weight of the unit.

Description

  The present invention relates to an electronic device installed and used at a high place and a heat dissipation unit used for the electronic device.

  For example, an electronic device includes a display device that displays information on the surface thereof, and includes a control device that drives the display device on the back side of the display device, and the outside is covered with a partition plate. And this electronic device was suspended from the ceiling (for example, patent document 1).

JP-A-7-322172

  When such electronic devices are installed outdoors, in order to dissipate the heat generated from the display device and the control device, the heat dissipating structure has a radiator on the back cover of the electronic device and a fan inside. It was arranged, the air was stirred, and the heat filled in the electronic device was released from the radiator to the outside. And this radiator was integrally formed with the cover made of a metallic block such as aluminum. Further, inside the cover, a metal heat conductor is provided in contact between the heat generating component in the control device and the radiator, and the generated heat is conducted to the radiator. For this reason, the electronic equipment is heavy, and a strong suspension member is required to hang it at a high place. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to reduce the weight of a heat dissipation structure, that is, a heat dissipation unit.

  And in order to achieve this object, the heat radiating unit of the present invention includes a partition plate having an upper opening and a lower opening, a fan disposed on one surface side of the partition plate, and the other surface side of the partition plate. The heat exchanger is configured to polymerize a third synthetic resin plate in a horizontal direction from a first synthetic resin plate arranged in the vertical direction, and polymerize the first synthetic resin. A vertical radiating air passage is formed between the plate and the second synthetic resin plate, a convection air passage is formed between the second synthetic resin plate and the third synthetic resin plate, and an upper opening of the vertical radiating air passage The part is connected to the upper opening of the partition plate, and the lower opening of the heat radiating air passage is connected to the lower opening of the partition plate.

  According to the present invention, it comprises a partition plate having an upper opening and a lower opening, a blower disposed on one surface side of the partition plate, and a heat exchanger disposed on the other surface side of the partition plate, The heat exchanger polymerizes a third synthetic resin plate in a horizontal direction from a first synthetic resin plate arranged in the vertical direction, and the vertical direction between the polymerized first synthetic resin plate and the second synthetic resin plate. A convection air passage is formed between the second synthetic resin plate and the third synthetic resin plate, and the upper opening portion of the vertical heat radiating air passage is formed at the upper opening portion of the partition plate. The lower opening of the heat radiating air passage is connected to the lower opening of the partition plate, so that the partition plate is connected to the heat radiating air passage formed between the first synthetic resin plate and the third synthetic resin plate. The air flowed from the one side by the blower is formed between the second synthetic resin plate and the third synthetic resin plate. Heat exchange with natural convection air flowing through the convection air path, heat generated on one side of the partition plate can be dissipated to the other side of the partition plate, and the specific gravity of the synthetic resin is metal Because it is smaller, the heat exchanger made of synthetic resin plate can be reduced in weight compared to a heat exchanger such as a heat sink made of metal, and this heat exchanger made of synthetic resin plate, partition plate, and blower By forming a unitized heat dissipation structure using and, it is possible to provide a lightened heat dissipation unit.

The figure which shows the installation state of the display apparatus of Embodiment 1 of this invention. Rear perspective view of the display device Side sectional view of the display device ((a) a diagram showing a configuration of a back cover and a flow of natural convection air, (b) a diagram showing a flow of air flowing through a heat radiation air passage) Diagram showing the configuration of the heat dissipation unit The figure which shows the structure of the heat exchanger ((a) The perspective view of a heat exchanger, (b) The figure which shows the superposition | polymerization structure of the 3rd synthetic resin board from the 1st synthetic resin board) Figure with the back cover on the back side of the electronic device removed The figure which shows the structure of the thermal radiation unit of the same Embodiment 2. FIG. 11 is a diagram showing a configuration of an electronic device according to the second embodiment.

  The heat dissipating unit according to claim 1 of the present invention includes a partition plate having an upper opening and a lower opening, a blower disposed on one surface side of the partition plate, and heat disposed on the other surface side of the partition plate. A heat exchanger, wherein the heat exchanger polymerizes the third synthetic resin plate in the horizontal direction from the first synthetic resin plate arranged in the vertical direction, and the polymerized first synthetic resin plate and the second synthetic resin plate A vertical radiating air passage is formed between the synthetic resin plates, a convection air passage is formed between the second synthetic resin plate and the third synthetic resin plate, and an upper opening of the vertical radiating air passage is formed by the partition. It connects with the upper opening part of a board, and the lower opening part of this thermal radiation air path is connected with the lower opening part of the said partition plate. Thereby, it has the effect of providing the weight-reduced heat radiating unit which can circulate through the heat radiating air path forcibly and radiate heat to the convection air path in the heat exchanger.

  Moreover, the heat radiation unit of Claim 2 connects the suction side of a fan with the downward opening part of a partition plate. As a result, the air that has dissipated the heat of the heat radiating air passage to the convection air passage in the heat exchanger is sucked into the blower on the one surface side of the partition plate from the lower opening of the heat exchanger and blown out. It has the effect that it will be done.

  According to a third aspect of the present invention, the heat radiating unit is formed by connecting the blower side of the blower to the upper opening of the partition plate. Thereby, the air on the one surface side of the partition plate is sucked from the upper opening portion of the heat exchanger arranged on the other surface side through the upper opening portion, and the heat of the heat radiating air passage is dissipated to the convection air passage. Have.

  Moreover, the heat radiating unit according to claim 4 is configured such that the blower has a plurality of blower fans arranged in the horizontal direction. Thereby, with respect to the electronic device comprised thinly, it has the effect that a thermal radiation unit can be easily attached and the thermal radiation can be performed.

  According to a fifth aspect of the present invention, the upper opening and the lower opening of the partition plate are horizontally long openings that are extended in the horizontal direction. Thereby, air can be widely circulated on the one surface side of the partition plate, and it has an effect that it can be easily attached to a thin electronic device.

  According to a sixth aspect of the present invention, a frame that covers the heat exchanger is provided on the other surface side of the partition plate, and the frame is integrated with the partition plate. Thereby, it has the effect that the upper opening part of a heat exchanger, the upper opening part of a partition plate, and the lower opening part of a heat exchanger, and the lower opening part of a partition plate can be integrated.

  According to a seventh aspect of the present invention, the frame body has a configuration in which the frame has openings at the top and bottom and the middle. As a result, air escapes from the upper opening and air flows from the lower opening, and in the middle opening, air enters and exits in accordance with minute convection and heat is radiated from the heat exchanger. Have

  In the heat dissipation unit according to the eighth aspect, the convection air passage has a plurality of convection outlets in the vertical direction. Accordingly, there is an effect that micro convection is generated between adjacent convection outlets, and heat radiation inside the heat exchanger is promoted by the air entering and exiting by the micro convection.

  According to a ninth aspect of the present invention, the convection air passage has a convection inlet at a lower portion. Thereby, it has the effect that the natural convection which generate | occur | produces in a heat exchanger is accelerated | stimulated.

  In the heat dissipation unit according to the tenth aspect, a middle opening is provided in the middle of the partition plate in the vertical direction, and the middle opening is connected to the heat radiation air passage. Accordingly, there is an effect that the heat generated in the cover is quickly sucked from the middle opening through the middle opening.

  In the heat radiating unit according to claim 11, the heat exchanger is provided with a middle opening, and the middle opening and the middle opening of the partition plate are connected. Thereby, the heat generated in the cover has an effect of quickly sucking in from the middle opening through the middle opening.

  According to a twelfth aspect of the present invention, the heat dissipation unit is integrated with the main body of the electronic device. Thereby, the heat dissipation structure, that is, the heat dissipation unit is easily integrated with the electronic device, and the electronic device can be reduced in weight.

  According to a thirteenth aspect of the present invention, there is provided an electronic apparatus having a display device on the front surface side and a control device provided on the rear surface side of the display device, and a heat dissipation unit integrated in the rear of the control device. Accordingly, the heat dissipation structure, that is, the heat dissipation unit is easily integrated with the electronic device on the rear surface side of the display device, and the electronic device can be reduced in weight.

  According to a fourteenth aspect of the present invention, an opening is provided on the rear side of the control device of the electronic device main body, and the opening is covered with a partition plate of the heat dissipation unit. Thus, the inside and outside of the electronic device main body can be easily separated by the partition plate, and the heat generated inside the electronic device is forcibly radiated.

  In the electronic device according to claim 15, the control device includes a semiconductor switching element, and a middle opening is provided in a partition plate portion facing the semiconductor switching element, and the middle opening is a heat exchanger. It is connected to the heat dissipation air passage. Accordingly, the heat generated by the semiconductor switching element can be quickly sucked into the heat exchanger without being circulated in the cover.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, a display device 1 typified by an electronic device is suspended, for example, on the outdoor side of a pharmacy store.

  A display panel 2 is provided on the surface to notify the customer in real time of the arrival status of a product that people are waiting for, such as “mask is received”.

  As shown in FIG. 2, a back cover 3 having a large number of holes is provided on the back surface of the display device 1. As shown in FIG. 3A, the back cover 3 has a first opening 5 and a second opening 6 formed by a lid 4 on the upper surface and the plurality of holes on the lower surface and the rear surface, respectively.

  Now, the display device 1 is provided with the display panel 2 using the electronic display device having the plasma display panel as an example on the surface as described above, and information is displayed as an image to the display panel 2 inside the display device 1. A control device 7 that performs control to be displayed is arranged, and a cover 8 that covers the control device 7 is provided. Further, the back surface of the cover 8 is opened on the rear side of the control device 7, and a partition plate 9 having a rectangular shape is provided in the opening.

  The partition plate 9 is provided with a blower 10 and a heat exchanger 11 on the inner side and the outer side of the cover 8, respectively. The heat exchanger 11 is integrated (press-contacted) with the partition plate 9 by a frame body 12. Yes. In addition, the back cover 3 covers the cover 8 and the frame 12 from the back side of the display device 1.

  As shown in FIG. 4, the partition plate 9 includes an upper opening 13 that is formed horizontally and parallel to the upper side, and a lower opening 14 that is formed horizontally and parallel to the lower side. Have That is, the upper opening 13 and the lower opening 14 are horizontally long openings that are extended in the horizontal direction. Then, the upper opening 15 and the lower opening 16 of the heat exchanger 11 are arranged to face the upper opening 13 and the lower opening 14, respectively. Further, a blower 10 is provided on the opposite surface of the partition plate 9 so as to face the lower opening 14. The blower 10 is disposed inside the cover 8 so as to face the lower portion of the control device 7 and connects the suction side of the blower 10 to the lower opening 14 of the partition plate 9. And these heat blower 10, the partition plate 9, the heat exchanger 11, and the frame 12 comprise the thermal radiation unit 17. FIG.

  That is, the rear side of the control device 7 of the main body of the display device 1 which is an electronic device is an opening, and this opening is covered with the partition plate 9 of the heat dissipation unit 17.

  In this way, the heat radiating unit 17 is provided integrally behind the control device 7, and the heat radiating unit 17 is provided integrally with the display device 1 (FIG. 6).

  The blower 10 has a configuration in which a plurality of blower fans 10a are arranged in the horizontal direction.

  As shown in FIG. 4, the frame 12 has both side surfaces 12a closed, the top surface 12c, the bottom surface 12d and the back surface 12e opened, the front side opened, and a flange 12f around the opening. Provided and connected to the partition plate 9. That is, on the other surface side of the partition plate 9, a frame body 12 that covers the heat exchanger 11 and has openings in the upper and lower sides and the middle portion is provided. The frame body 12 is integrated with the partition plate 9.

  As shown in FIG. 5, the heat exchanger 11 superposes the first synthetic resin plate 18, the second synthetic resin plate 19, and the third synthetic resin plate 20 arranged in the vertical direction in order in the horizontal direction. The heat radiation air passage 21 is formed between the polymerized first synthetic resin plate 18 and the second synthetic resin plate 19, and the vertical direction is formed between the second synthetic resin plate 19 and the third synthetic resin plate 20. The convection air path 22 is formed.

  That is, the heat radiating air passage 21 is formed in a U-shape inside the heat exchanger 11 by a plurality of lanes 23 formed in a U-shape on the first synthetic resin plate 18, and heat exchange is performed. The upper opening 15 and the lower opening 16 are formed in one side surface 11a of the vessel 11.

  Further, the convection air passage 22 has a straight air passage formed inside the heat exchanger 11 by a lane 24 formed linearly in the vertical direction on the second synthetic resin plate 19. A convection inlet 25 and a second outlet 26, which are second inlets, are formed on the lower surface (lower part) and the upper surface (upper part), respectively. The lane 24 is arranged in parallel from the one side surface 11a toward the opposite side surface 11b, and a part of the lane 24 communicates with the adjacent lane.

  Further, the lane 24a closest to the other side surface 11b has a plurality of convection outlets 27 opened to the other side surface 11b.

  In other words, the convection air passage 22 has a second outlet 26 at the upper part, a convection inlet 25 at the lower part, and a plurality of convection outlets 27 in the vertical direction.

  The second outlet 26, the convection inlet 25, and the convection outlet 27 communicate with the top surface 12 c, the bottom surface 12 d, and the back surface 12 e of the frame body 12.

  In the above configuration, when the display device 1 is driven and the display panel 2 is turned on as described above, it is possible to display the arrival status of goods that people are waiting for, but the circuit components in the control device 7 have a large heat. Is generated.

  That is, in such a display device 1 for outdoor people, it is necessary to increase the light emission luminance of the display panel 2 as compared with the display on an indoor TV, and a very large amount of electric power and accompanying heat are generated. . Further, since the display device 1 is used outdoors, the control device 7 is covered with a cover 8 and a heat radiating unit 17 so as to prevent entry of dust and rainwater, and the inside of the display device 1 is hermetically sealed. The inside of the machine is configured to store very large heat.

  Therefore, when display is started on the display panel 2, the blower 10 is driven to send air from the lower side to the upper side of the control device 7 in the cover 8, and the upper opening of the heat exchanger 11 is opened from the upper upper opening 13. Air is sucked into the blower 10 again through the part 15 and the lower opening 16. That is, the air in the cover 8 is forced to circulate through the heat radiating air passage 21 by the action of the blower 10. Thereby, the heat generated from the control device 7 is transmitted to the inside of the heat exchanger 11. That is, the temperature inside the heat exchanger 11 rises outside the cover 8 with the partition plate 9 as a boundary. And a thermal gradient arises between the air around the heat exchanger 11, and natural convection of air is generated inside the back cover 3. By this convection, the warm air flowing from the second outlet 26 of the heat exchanger 11 to the second opening 6 is released, and the outside air flows from the first opening 5 to the convection inlet 25. And since the said convection inlet 25 was provided in the lower part of the heat exchanger 11, and the 2nd outlet 26 was provided in the upper part of the heat exchanger 11, natural convection is accelerated | stimulated and a heat dissipation effect can be made remarkable.

  Further, as the internal temperature of the heat exchanger 11 rises, the convection outlet 27 has a minute convection 22a between the lane 24a of the heat exchanger 11 and the outside air and between the adjacent convection outlets 27 as shown in FIG. And heat release from the heat exchanger 11 is promoted by the entry and exit of air by the micro convection 22a.

  The heat generated from the control device 7 and the display panel 2 in the cover 8 can be radiated.

  Further, in the present embodiment, the example in which the blower 10 is attached to the lower opening 14 has been described. However, the fan 10 is attached to the upper opening 13 and air is sucked from above in the cover 8 to exchange heat from the upper opening 13. Even if the air is blown into the vessel 11 and the air is again circulated into the cover 8 from the lower opening 14, the effect is not changed.

  However, in the case of the configuration of the present embodiment, the blower 10 can forcibly apply air to the control device 7, so that heat can be radiated more effectively from the heat-generating component.

  Moreover, in this Embodiment, by having set the air blower 10 as the structure which has arrange | positioned the several ventilation fan 10a to the horizontal direction, the thermal radiation unit 17 is easily attached with respect to the electronic device comprised thinly, and the heat dissipation is performed. Can do.

  Further, the upper opening 13 and the lower opening 14 of the partition plate 9 are horizontally long openings that are extended in the horizontal direction, so that air can be widely circulated on one surface side of the partition plate 9 and a thin display device. 1 can be easily attached.

  Further, a frame body 12 covering the heat exchanger 11 is provided on the other surface side of the partition plate 9, and the frame body 12 is integrated by being pressed against the partition plate 9, and is an upper part of the heat exchanger 11. The opening 15 and the upper opening 13 of the partition plate 9 and the lower opening 16 of the heat exchanger 11 and the lower opening 14 of the partition plate 9 can be integrated.

  Further, as in the present embodiment, the heat radiating unit 17 is configured by the blower 10, the partition plate 9, the heat exchanger 11, and the frame 12, so that the heat generated inside can be easily attached to the back surface of the electronic device. Can be forcibly released, and its effect is great.

  Further, the third synthetic resin plate 20 is polymerized from the first synthetic resin plate 18 arranged in the vertical direction, and the vertical direction between the first synthetic resin plate 18 and the second synthetic resin plate 19 is polymerized. A heat radiating air passage 21 is formed, and the heat exchanger 11 in which a convection air passage 22 is formed between the second synthetic resin plate 19 and the third synthetic resin plate 20 is provided, and the specific gravity of the synthetic resin is smaller than that of metal. The heat exchanger 11 made of a synthetic resin plate can be reduced in weight as compared with a heat exchanger such as a heat sink made of metal, and the heat exchanger 11 made of this synthetic resin plate, the partition plate 9 and the blower 10. And the frame 12 to form a unitized heat dissipation structure, the heat dissipation unit 17 can be reduced in weight, and an electronic device using the unit can also be reduced in weight. For display devices that are installed in a high place like the display device 1 The effect Te is large.

  Moreover, since the heat exchanger 11 made of a synthetic resin plate can be reduced in weight as compared with a heat exchanger such as a heat sink made of metal, the partition plate 9 to which the heat exchanger 11 is attached may be a thin plate. The rigidity can be maintained, and the heat dissipation unit 17 can be further reduced in weight. Further, by reducing the weight of the heat radiating unit 17, even if the outer shell constituting the display device 1 is a thin plate, the rigidity can be maintained, and the weight of the display device 1 (electronic device) can be further reduced.

  In addition, in a display device using a panel-shaped display body such as a plasma display panel like the display device 1 of the present embodiment, the control device that drives the display unit includes a large number of circuit components that generate heat. It has a great effect to release.

(Embodiment 2)
In the first embodiment, the basic configuration of the present invention has been described.

  Next, a configuration for obtaining a heat radiation effect according to the configuration of the electronic device will be described.

  For ease of understanding, the description of the same configuration as that of the first embodiment is simplified.

  That is, as shown in FIGS. 7 and 8, the configuration of the heat radiating unit 17 of the embodiment is changed to the partition plate 9 and the heat exchanger 11 to form a partition plate 28 and a heat exchanger 29.

  In addition to the configuration of the partition plate 9, the partition plate 28 is provided with a middle opening 30 in the middle of the rectangular plate, that is, a portion between the upper opening 13 and the lower opening 14. The middle opening 30 is disposed to face the heat generating component 31 that is a semiconductor switching element disposed in the control device 7.

  Further, in addition to the configuration of the heat exchanger 11, the heat exchanger 29 has a central portion in the lane 23a adjacent to the one side surface 11a among the plurality of lanes 23 formed in a U shape on the first synthetic resin plate 18. An opening 33 is provided. The middle opening 33 is a portion whose position matches the middle opening 30 when it is formed integrally with the partition plate 28, and communicates with the other side via the partition plate 28.

  In the above configuration, the air in the cover 8 is forced to circulate through the heat radiating air passage 21 by the action of the blower 10. Thereby, the heat generated from the control device 7 is transmitted to the inside of the heat exchanger 29. At this time, since the blower 10 sucks air from the lower opening 14 and blows it out into the cover 8, the air in the cover 8 is sucked into the heat exchanger 29 from the upper opening 13 and the middle opening 30. It will be. In particular, in the present embodiment, by providing the middle opening 30, heat generated from the heat generating component 31 in the control device 7 is quickly sucked into the heat exchanger 29 from the middle opening 33, and the first The heat of the heat radiating air passage 21 is released to the convection air passage 22 through the synthetic resin plate 18.

  The heat generated from the control device 7 and the display panel 2 in the cover 8 can be radiated.

  In addition, by providing a plurality of middle openings 33 in the present embodiment in the heat exchanger 29, the heat exchanger 29 at an arbitrary position can be provided in the cover 8 depending on the position of the middle opening 30 provided in the partition plate 28. The middle opening portion 33 can be communicated with the heat generating component 31, and the heat generated by the heat generating component 31 can be covered with the cover 8 by arranging the middle opening portion 30 corresponding to the heat generating component 31 according to the configuration of the control device 7. Without being circulated into the heat exchanger 29, it can be quickly sucked into the heat exchanger 29. Therefore, in the cover 8, the influence of the heat generated by the heat generating component 31 on other components can be reduced. Therefore, a larger heat dissipation effect can be obtained compared to the example of the first embodiment.

  A heat dissipating unit according to the present invention and an electronic device using the heat dissipating unit include a partition plate having an upper opening and a lower opening, a fan disposed on one surface side of the partition plate, and the other surface side of the partition plate. A heat exchanger, wherein the heat exchanger polymerizes the third synthetic resin plate in the horizontal direction from the first synthetic resin plate arranged in the vertical direction, and the polymerized first synthetic resin plate A vertical radiating air passage is formed between the second synthetic resin plates, a convection air passage is formed between the second synthetic resin plate and the third synthetic resin plate, and an upper opening of the vertical radiating air passage is The lower opening of the heat radiating air passage is connected to the lower opening of the partition plate, so that the lower opening of the heat radiating air passage is connected between the first synthetic resin plate and the third synthetic resin plate. The air that is blown by the blower from one side of the partition plate to the formed heat radiating air passage is the second Heat exchange is performed by natural convection air flowing in the convection air passage formed between the synthetic resin plate and the third synthetic resin plate, and heat generated on one side of the partition plate is radiated to the other side of the partition plate. Since the specific gravity of synthetic resin is smaller than that of metal, the heat exchanger made of synthetic resin plate can be reduced in weight compared to a heat exchanger such as a heat sink made of metal. By forming a heat dissipation structure that is unitized using a heat exchanger made of a resin plate, a partition plate, and a blower, it is possible to provide a heat dissipation unit that has been reduced in weight. It is extremely useful because it can reduce the weight of electronic devices that can be suspended and installed on the floor.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 Display panel 3 Back cover 4 Cover 5 1st opening 6 2nd opening 7 Control apparatus 8 Cover 9 Partition plate 10 Blower 10a Several ventilation fan 11 Heat exchanger 11a One side surface 11b Other side surface 12 Frame body 13 Upper opening Part 14 Lower opening 15 Upper opening 16 Lower opening 17 Heat radiating unit 18 First synthetic resin plate 19 Second synthetic resin plate 20 Third synthetic resin plate 21 Radiating air passage 22 Convection air passage 22a Micro convection 23 Lane 23a Lane 24 Lane 24a Lane 25 Convection inlet 26 Second outlet 27 Convection outlet 28 Partition plate 29 Heat exchanger 30 Middle opening 31 Heating component 33 Middle opening

Claims (15)

A partition plate having an upper opening and a lower opening; a blower disposed on one surface side of the partition plate; and a heat exchanger disposed on the other surface side of the partition plate, the heat exchanger comprising: The third synthetic resin plate is polymerized in the horizontal direction from the first synthetic resin plate arranged in the vertical direction, and a vertical heat radiating air passage is formed between the polymerized first synthetic resin plate and the second synthetic resin plate. A convection air passage is formed between the second synthetic resin plate and the third synthetic resin plate, and an upper opening portion of the vertical radiating air passage is connected to an upper opening portion of the partition plate. The lower opening part of the path is a heat dissipation unit connected to the lower opening part of the partition plate. The heat dissipation unit according to claim 1, wherein the suction side of the blower is connected to the lower opening of the partition plate. The heat dissipation unit according to claim 1, wherein the blowout side of the blower is connected to the upper opening of the partition plate. The heat radiating unit according to claim 2 or 3, wherein the blower has a configuration in which a plurality of blower fans are arranged in a horizontal direction. The heat dissipation unit according to claim 4, wherein the upper opening and the lower opening of the partition plate are horizontally long openings extending in the horizontal direction. The heat radiating unit according to any one of claims 1 to 5, wherein a frame body covering the heat exchanger is provided on the other surface side of the partition plate, and the frame body is integrated with the partition plate. The heat dissipating unit according to claim 6, wherein the frame body is configured to have openings at the top and bottom and the middle. The heat dissipation unit according to any one of claims 1 to 7, wherein the convection air path has a plurality of convection outlets in a vertical direction. The heat dissipation unit according to claim 8, wherein the convection air passage has a convection inlet at a lower portion. The heat radiation unit according to any one of claims 1 to 9, wherein a middle opening is provided in a middle portion in the vertical direction of the partition plate, and the middle opening is connected to a heat radiation air passage. The heat dissipation unit according to claim 10, wherein the heat exchanger is provided with a middle opening, and the middle opening and the middle opening of the partition plate are connected. The electronic device which integrated the thermal radiation unit as described in any one of Claim 1 to 11 into the electronic device main body. The electronic device main body according to claim 12, wherein the electronic device main body includes a display device on a front surface side and a control device provided on a rear surface side of the display device, and a heat dissipation unit is integrated behind the control device. The electronic device according to claim 13, wherein the rear side of the control unit of the electronic device body is an opening, and the opening is covered with a partition plate of the heat dissipation unit. The control device includes a semiconductor switching element, and a middle opening is provided in a partition plate portion facing the semiconductor switching element, and the middle opening is connected to a heat radiating air passage of the heat exchanger. 14. The electronic device according to any one of 14.

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