ELECTRONIC DEVICE

A housing has an exhaust port and an intake port on one side and another side in a second direction, heat generators and fans arranged in a first direction, the fans on one side in the second direction of the heat generators, and an airflow restrictor between the heat generators and fans. The airflow restrictor includes a pair of guide portions arranged side by side with a first gap therebetween in the first direction. Each guide portion has an airflow guide surface facing the other side in the second direction and inclined toward the first gap. The housing includes a pair of first inner side surfaces facing each other in the first direction and a pair of second inner side surfaces facing each other in a third direction. A gap is between any one of the first inner side surfaces and the second inner side surfaces and the airflow restrictor.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present invention claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2022-155832 filed on Sep. 29, 2022, the entire content of which is incorporated herein by reference.

FIELD OF THE INVENTION

The present invention relates to an electronic device.

BACKGROUND

In an electronic device having a plurality of heat generating components, a plurality of fans generate a flow of air in a housing to cool the heat generating components. In such an electronic device, when the air blowing amount of a part of the fans decreases, a region in which the flow velocity of the air locally decreases is generated in the housing, which may cause insufficient cooling of a part of the heat generating components. Conventionally, there is known a structure in which a partition plate having a throttle portion for concentrating an air flow is provided between a fan and a heat generating component to uniformly cool each heat generating component even if a part of the fan fails.

In the partition plate of the conventional technique, the air flow cannot be sufficiently uniformized, the unevenness occurs in the air volume depending on the location of the heat generating component, and the reliability of the cooling structure cannot be sufficiently enhanced.

SUMMARY

According to one aspect of the present invention, there is provided: a housing having a box shape with a first direction, a second direction, and a third direction orthogonal to each other as respective plane directions, an exhaust port being provided at an end portion on one side in the second direction, and an intake port being provided at an end portion on an other side in the second direction; a plurality of heat generators arranged in the first direction in the housing; a plurality of fans arranged in the first direction in the housing, arranged on one side in the second direction with respect to the plurality of heat generators, and configured to generate an airflow on one side in the second direction in the housing; and an airflow restrictor positioned between the plurality of heat generators and the plurality of fans in the housing. The airflow restrictor includes a pair of guide portions arranged side by side with the first gap interposed therebetween in the first direction. Each of the pair of guide portions has an airflow guide surface facing the other side in the second direction and inclined toward the first gap side. The inner side surface of the housing includes a pair of first inner side surfaces facing each other in the first direction and a pair of second inner side surfaces facing each other in the third direction. A gap is provided between any one of the pair of first inner side surfaces and the pair of second inner side surfaces and the airflow restrictor.

DETAILED DESCRIPTION

Each drawing illustrates a first direction D1, a second direction D2, and a third direction D3. The first direction D1, the second direction D2, and the third direction D3are directions orthogonal to each other. Hereinafter, each part of an electronic device1will be described based on the first direction D1, the second direction D2, and the third direction. In the following description, the direction of each unit of the electronic device1may be described with one side (+D3side) in the third direction as the upper side. However, the posture of the electronic device1at the time of use is an example, and is not limited to the following embodiment.

FIG.1is a perspective view of the electronic device1according to a first embodiment. The electronic device1of the present embodiment is a calculation server. However, the application of the electronic device1is not limited to the present embodiment.

The electronic device1includes a plurality of first heat generators (heat generators)30, a plurality of second heat generators10, a cooling device4, an airflow restrictor50, and a housing60that houses these components. InFIG.1, the housing60is illustrated in a state where the upper lid portion is removed.

The housing60has a box shape with the first direction D1, the second direction D2, and the third direction D3as respective plane directions. The housing60is made of, for example, a metal material.

The housing60is provided with an exhaust port60aand an intake port60b. The exhaust port60ais provided at an end portion on one side (+D2side) in the second direction of the housing60. The intake port60bis provided at an end portion on the other side (−D2side) in the second direction of the housing60. The exhaust port60aand the intake port60bare provided by opening side walls on both sides in the second direction of the housing60. The air is taken into the housing60from the intake port60band discharged to the outside of the housing60at the exhaust port60a. The air flows from the other side (−D2side) in the second direction toward one side (+D2side) in the second direction in the housing60.

The plurality of first heat generators30are arranged in the first direction D1in the housing60. The electronic device1according to the present embodiment is provided with ten first heat generators30. The first heat generator30has a substantially rectangular parallelepiped shape. A slight gap is provided between the first heat generators30arranged in the first direction D1. A seal member39is disposed between the first heat generators30adjacent to each other. The seal member39closes a gap between the first heat generators30.

FIG.2is an exploded view of the first heat generator30.

The first heat generator30includes a board31, a heat element32, and a heat sink33.

The board31is a rigid board, and a circuit is provided on the surface and inside. The board31has a mounting surface31aextending along a direction orthogonal to the first direction D1. The mounting surface31afaces one side (+D1side) in the first direction. The heat element32is mounted on the mounting surface31a. In addition, another element may be mounted on the board31.

The board31may be connected to the board31of another first heat generator30. In this case, the boards31are connected to each other via a main board (not illustrated) or the like. The main board is located on the other side (−D3side) in the third direction with respect to the board31and extends along a plane orthogonal to the third direction D3.

The heat element32is an image processing element such as a graphics processing unit (GPU). However, the type of the heat element32is not limited as long as it is an element that generates heat in accordance with driving. In addition to the heat element32described above, another heat element may be mounted on the board31.

The heat sink33is made of a metal material having high heat conductivity such as an aluminum alloy. At least one heat sink33is attached to each heat element32. The heat sink33includes a base plate33eand a plurality of fins33f.

The base plate33eextends along the mounting surface31aof the board31. That is, the base plate33eextends along a direction orthogonal to the first direction D1. The base plate33ehas a heat absorbing surface33gfacing the other side (−D2side) in the first direction. The heat absorbing surface33gfaces the heat element32. The heat absorbing surface33gmay be in direct contact with the heat element32or may be in contact with the heat element32via a flowable heat transfer material such as heat radiation grease. In either case, the heat of the heat element32is transferred to the heat absorbing surface33gof the heat sink33.

The plurality of fins33fare provided on the surface on one side (+D1side) in the first direction of the base plate33e. Each of the fins33fhas a rectangular shape. Each of the fins33fextends along a plane orthogonal to the third direction D3. The plurality of fins33fare arranged along the third direction D3with a gap interposed therebetween. That is, the heat sink33has a plurality of fins33farranged in one direction (the third direction D3in the present embodiment). The air generated by the cooling device4to be described later passes between the fins33f. As a result, the heat transferred from the heat element32to the heat sink33is transferred to the air. That is, the heat sink33dissipates the heat of the heat element32.

As illustrated inFIG.1, the second heat generator10is disposed on the other side (−D2side) in the second direction with respect to the first heat generator30. The plurality of second heat generators10are arranged in the first direction D1in the housing60. The electronic device1according to the present embodiment is provided with ten second heat generators10. The second heat generator10includes a heat element (not illustrated) similarly to the first heat generator30. The calorific value of the heat element of the second heat generator10is smaller than the calorific value of the heat element32of the first heat generator30.

The cooling device4is disposed at an end portion on one side (+D2) in the second direction in the housing60. Therefore, the cooling device4is located on one side (+D2side) in the second direction with respect to the first heat generator30. The cooling device4covers the exhaust port60a.

The cooling device4has a plurality of fans40. That is, the electronic device1includes the plurality of fans40. In the present embodiment, the cooling device4is provided with five fans40. The plurality of fans40are arranged in the first direction D1. That is, the electronic device1includes three or more fans40.

Each of the plurality of fans40is an axial fan that takes in air from the other side (−D2side) in the second direction and sends air to one side (+D2side) in the second direction. As a result, the cooling device4generates an airflow on one side (+D2side) in the second direction in the housing60. The plurality of fans40are disposed on one side (+D2side) in the second direction with respect to the plurality of first heat generators30and the plurality of second heat generators10. Therefore, the airflow generated by the fan40flows around the first heat generator30and the second heat generator10. Note that the fan40is not limited to an axial fan as long as it generates an airflow in the second direction D2in the housing60, and may be another type of fan such as a centrifugal fan.

The airflow generated by the action of the cooling device4causes the air to enter the housing60from the outside of the housing60through the intake port60b. Further, the air passes through the inside of the housing60in the order of the second heat generator10and the first heat generator30, and is blown out of the housing60through the cooling device4and the exhaust port60a. This air cools the second heat generator10in the process of passing around the second heat generator10, and cools the first heat generator30in the process of passing around the first heat generator30.

According to the present embodiment, among the first heat generator30and the second heat generator10, the first heat generator30having a relatively large calorific value is disposed downstream of the second heat generator10having a relatively small calorific value. That is, the plurality of heat generators10and30are arranged in the order of increasing calorific value along the direction of the airflow in the housing60. As a result, the air warmed by the first heat generator30having a large calorific value does not warm the second heat generator10, and the heat generators10and30can be reliably cooled. Although not illustrated here, another heat generator may be disposed between the first heat generator30and the second heat generator10in the second direction. In this case, the calorific value of the heat generator is preferably larger than the calorific value of the second heat generator10and smaller than the calorific value of the first heat generator30.

The airflow restrictor50is located between the plurality of first heat generators30and the plurality of fans40in the housing60. That is, in the housing60, the second heat generator10, the first heat generator30, the airflow restrictor50, and the fan40are arranged in this order toward one side (+D2side) in the second direction. The airflow restrictor50restricts the flow of air flowing between the plurality of first heat generators30and the plurality of fans40.

The airflow restrictor50includes a pair of guide portions51and52. The guide portions51and52of the present embodiment have a triangular prism shape extending in the third direction D3. The pair of guide portions51and52are arranged in the first direction D1.

FIG.3is a plan view illustrating a part of the electronic device1on one side (+D2side) in the second direction.

As illustrated inFIG.3, the inner side surface of the housing60includes a pair of first inner side surfaces61facing each other in the first direction D1. As illustrated inFIG.3, a center line CL disposed at the center in the first direction D1and extending in the second direction D2when the electronic device1is viewed from the third direction D3is assumed. The pair of guide portions51and52is disposed mirror-symmetrically with respect to the center line CL.

In the following description, when the pair of guide portions51and52is described to be distinguished from each other, one positioned on the other side (−D1side) in the first direction is referred to as a first guide portion51, and the other positioned on one side (+D1side) in the first direction is referred to as a second guide portion52.

The first guide portion51has an airflow guide surface51a, a back surface51b, a side surface51c, an upper surface51d, and a lower surface51e. The airflow guide surface51ais inclined toward one side (+D2side) in the second direction as it goes toward one side (+D1side) in the first direction. The back surface51bis a surface orthogonal to the second direction D2and facing the other side (−D2side) in the second direction. The side surface51cis a surface orthogonal to the first direction D1and facing the other side (−D1side) in the first direction. The upper surface51dand the lower surface51eare surfaces facing one side and the other side in the third direction. The airflow guide surface51a, the back surface51b, and the side surface51care rectangular flat surfaces. The upper surface51dand the lower surface51eare triangular flat surfaces.

Similarly, the second guide portion52has an airflow guide surface52a, a back surface52b, a side surface52c, an upper surface52d, and a lower surface52e. The airflow guide surface52ais inclined to one side (+D2side) in the second direction toward the other side (−D1side) in the first direction. The back surface52bis a surface orthogonal to the second direction D2and facing the other side (−D2side) in the second direction. The side surface52cis a surface orthogonal to the first direction D1and facing one side (+D1) in the first direction. The upper surface52dand the lower surface52eare surfaces facing one side and the other side in the third direction. The airflow guide surface52a, the back surface52b, and the side surface52care rectangular flat surfaces. The upper surface52dand the lower surface52eare triangular flat surfaces.

A first gap G1is provided between the first guide portion51and the second guide portion52. That is, the pair of guide portions51and52is arranged side by side in the first direction D1with the first gap G1interposed therebetween. The first gap G1is located on the center line CL when viewed from the third direction. The first gap G1is located between a corner formed by the airflow guide surface51aand the back surface51bof the first guide portion51and a corner formed by the airflow guide surface52aand the back surface52bof the second guide portion52.

The first guide portion51and the second guide portion52face the first inner side surface61of the housing60with a gap G2therebetween. In the present specification, a gap between the first inner side surface61and the airflow restrictor50is defined as a second gap G2. The pair of second gaps G2is located on both sides in the first direction D1with respect to the airflow restrictor50. The second gap G2on one side is provided between the side surface51cof the first guide portion51and the first inner side surface61located on the other side (−D1side) in the first direction. The second gap G2on the other side is provided between the side surface52cof the second guide portion52and the first inner side surface61located on one side (+D1side) in the first direction. In the present embodiment, the dimensions d2and d3of the pair of second gaps G2are equal to each other.

FIG.4is a cross-sectional view of the electronic device1taken along line IV-IV inFIG.3.

As illustrated inFIG.4, the inner side surface of the housing60includes a pair of second inner side surfaces62aand62bfacing each other in the third direction D3. Here, when the pair of second inner side surfaces62aand62bis distinguished from each other, one located on the upper side is referred to as a top surface62a, and the other located on the lower side is referred to as a bottom surface62b. The bottom surface62bis an upper surface of the main board on which the first heat generator30is mounted.

The lower surface51eof the first guide portion51is fixed to the bottom surface62bof the housing60. On the other hand, the upper surface51dof the first guide portion51faces the top surface62aof the housing60with a gap G3. In the present embodiment, a gap between the top surface62aand the airflow restrictor50is defined as a third gap G3. Although not illustrated, the second guide portion52is also fixed to the bottom surface62bon the lower surface52esimilarly to the first guide portion51, and faces the top surface62awith the third gap G3interposed therebetween on the upper surface52d. A dimension h1of the third gap G3in the third direction D3is uniform over the entire third gap G3. That is, the third gap G3having the uniform height dimension h1is provided between the airflow restrictor50and the top circle62aof the present embodiment.

As illustrated inFIG.3, the airflow guide surfaces51aand52aof the pair of guide portions51and52of the present embodiment face the other side (−D2side) in the second direction and are inclined toward the first gap G1side. Therefore, the airflow restrictor50generated in the housing60by the plurality of fans40hits the airflow guide surfaces51aand52aand is guided to the first gap G1side. After passing through the first gap G1, the airflow is sucked into the plurality of fans40arranged in the first direction D1. That is, according to the present embodiment, the airflow generated by the plurality of fans40is concentrated by the airflow restrictor50. Therefore, even when the air blowing amount of one of the plurality of fans40extremely decreases, it is possible to suppress the local decrease in the air volume in the region facing the fan40. As a result, it is possible to suppress insufficient cooling of the heat element32in the specific first heat generator30.

The airflow guide surfaces51aand52aof the present embodiment are flat surfaces. However, the airflow guide surfaces51aand52amay be curved surfaces. In this case, each of the airflow guide surfaces51aand52apreferably has a uniform cross section along the third direction. The airflow guide surfaces51aand52aare preferably convex curved surfaces.

As described above, most of the airflow in the housing60is concentrated in the first gap G1by the pair of airflow guide surfaces51aand52aof the airflow restrictor50. However, in this case, the airflow is difficult to flow in a region away from the first gap G1, and there is a possibility that the amount of heat radiation of the first heat generator30away from the first gap G1decreases. According to the present embodiment, the gaps G2and G3are provided between the airflow restrictor50and the inner side surface of the housing60. Therefore, it is possible to prevent a part of the airflow from passing through the gaps G2and G3and flowing to the first heat generator30disposed in a region away from the airflow restrictor50, and to prevent the heat element32in the first heat generator30away from the first gap G1from being insufficiently cooled.

In the present embodiment, both the second gap G2and the third gap G3are provided in the housing60, but this effect can be obtained even if either one is provided. That is, a gap may be provided between any one of the pair of first inner side surfaces61and the pair of second inner side surfaces62aand62band the airflow restrictor50. As illustrated in the present embodiment, when both the second gap G2and the third gap G3are provided, these effects can be more remarkably obtained.

According to the present embodiment, the guide portions51and52each have a triangular shape extending in the third direction. According to the present embodiment, rigidity can be enhanced as compared with a plate-shaped guide portion or the like. Accordingly, even when the output of the fan40is increased to increase the air volume of the airflow flowing in the housing60, it is possible to suppress the vibration of the guide portions51and52due to the influence of the airflow to cause noise.

In the present embodiment, the back surfaces51band52bof the guide portions51and52extend in a direction orthogonal to the second direction D2. That is, the back surfaces51band52bof the guide portions51and52do not protrude toward the fan40. Therefore, a sufficiently wide gap is secured between the guide portions51and52and the fan40. By ensuring a gap between the guide portions51and52and the fan40, the suction amount of each of the plurality of fans40can be stabilized. As a result, the air volume of the airflow flowing in the housing60can be easily increased, and the plurality of heat generators10and30can be efficiently cooled.

As illustrated inFIG.3, a dimension e1of the first guide portion51in the first direction D1and a dimension e2of the second guide portion52in the first direction D1are defined. In the present embodiment, these dimensions e1and e2are lengths of the back surfaces51bof the guide portions51and52in the first direction D1, respectively. As a matter of course, the sum (e1+e2+d1+d2+d3) of the dimensions e1and e2of the pair of guide portions51and52, the dimension d1of the first gap G1, and the dimensions d2and d3of the pair of second gaps G2in the first direction D1is equal to the distance d4between the pair of first inner side surfaces61of the housing60.

In the present embodiment, a ratio ((e1+e2)/d4) of a sum (e1+e2) of the dimensions e1and e2of the pair of guide portions51and52in the first direction D1to the distance d4between the pair of first inner side surfaces61is preferably 50% or more and 80% or less. The airflow restrictor50covers a half or more (that is, 50% or more) of the width dimension in the housing60in the first direction D1, so that the airflow is concentrated in the gaps G1and G2, and the influence of the decrease in the air blowing amount of some fans40can be reduced. On the other hand, if the airflow restrictor50is made too large in the first direction D1, the air passage resistance at the time of passing through the airflow restrictor50extremely increases, and it becomes difficult for a sufficient amount of air to flow into the housing60. Therefore, the above-described ratio ((e1+e2)/d4) is preferably 80% or less.

In the present embodiment, the ratio (k1/k2) of the dimension k1of the guide portions51and52in the second direction D2to the distance k2between the fan40and the first heat generator30in the second direction D2is preferably 10% or more and 50% or less. By setting the ratio of k1/k2to 10% or more, the airflow guide surfaces51aand52aof the guide portions51and52can be disposed sufficiently long along the second direction, and the airflow can be easily guided to the first gap G1. By setting the ratio of k1/k2to 50% or less, it is possible to suppress inhibition of suction of the fan40by the guide portions51and52.

In the present embodiment, the dimension d1of the first gap G1in the first direction D1is preferably larger than the dimensions d2and d3of the second gap G2in the first direction D1(d1>d2, d1>d3). By setting the dimensions of the first gap G1and the second gap G2to have such a relationship, it is possible to generate a part of the airflow in the second gap G2while obtaining the effect of concentrating the airflow by the first gap G1.

The dimension d1of the first gap G1in the first direction D1is preferably larger than the dimension h1of the third gap G3in the third direction D3illustrated inFIG.3. By setting the dimensions of the first gap G1and the third gap G3in such a relationship, it is possible to generate a part of the airflow in the third gap G3while obtaining the effect of concentrating the airflow by the first gap G1.

In the present embodiment, the ratio (h3/h2) of the dimension h3of the guide portions51and52in the third direction D3to the distance h2between the pair of second inner side surfaces62aand62bis preferably 50% or more and 90% or less. The airflow restrictor50covers half or more (that is, 50% or more) of the width dimension in the housing60in the third direction D3, so that the airflow is concentrated in the gap G3, and the influence of the decrease in the air blowing amount of some fans40can be reduced. On the other hand, if the airflow restrictor50is made too large in the third direction D3, the air passage resistance at the time of passing through the airflow restrictor50extremely increases, and it becomes difficult for a sufficient amount of air to flow into the housing60. Therefore, the above-described ratio (h3/h2) is preferably 90% or less.

As illustrated inFIG.3, in the present embodiment, the seal member39is disposed between the first heat generators30adjacent to each other. According to the present embodiment, the gap between the first heat generators30is closed by the seal member39. As a result, the air flowing through the housing60flows between the fins33fof the first heat generator30without flowing through the gap, and the cooling of the first heat generator30is promoted.

The seal member39is preferably a heat conductive sheet. The seal member39is sandwiched between the first heat generators30arranged in the first direction D1and comes into contact with these first heat generators30. When the seal member39is a thermally conductive sheet, heat can be transferred between the first heat generators30adjacent to each other via the seal member39, and when the temperature of a specific first heat generator30increases, heat can be transferred to another first heat generator30.

The seal member39may be a sound absorbing material. In this case, the seal member39can reduce noise generated by driving the electronic device1. As the sound absorbing material, for example, a porous material having a porous structure is exemplified.

FIG.5is a plan view illustrating a part of one side (+D2side) in the second direction of the electronic device101according to the second embodiment. In the description of each embodiment below, the same reference numerals are given to the same components as those of the embodiment already described, and the description thereof will be omitted.

Similarly to the above-described embodiment, the electronic device101of the present embodiment includes an airflow restrictor150located between the plurality of first heat generators30and the plurality of fans40in the housing60. The airflow restrictor150includes a pair of guide portions151and152. The pair of guide portions151and152is disposed mirror-symmetrically when viewed from the third direction. The pair of guide portions151and152have airflow guide surfaces151aand152a, respectively. The gaps G1, G2, and G3provided between the guide portion151and the inner side surface of the housing60are also the same as those in the above-described embodiment.

In the present embodiment, the guide portions151and152have a plate shape with the airflow guide surfaces151aand152aas the plate surface direction. By forming the guide portions151and152in the plate shape, back surfaces151band152bof the guide portions151and152are separated from the fan40as being separated from the gap G1in the first direction. Therefore, a sufficiently wide gap can be secured between the guide portions151and152and the fan40, and the suction amount of each of the plurality of fans40can be stabilized. As a result, the air volume of the airflow flowing in the housing60can be easily increased, and the plurality of heat generators10and30can be efficiently cooled.

Although various embodiments of the present invention have been described above, configurations in the respective embodiments and combinations thereof are examples, and thus, addition, omission, replacement of configurations, and other modifications can be made within a range without departing from the spirit of the present invention. Also note that the present invention is not limited by the embodiment.

Note that the present technique can have a configuration below.

(1) An electronic device including: a housing having a box shape with a first direction, a second direction, and a third direction orthogonal to each other as respective plane directions, an exhaust port being provided at an end portion on one side in the second direction, and an intake port being provided at an end portion on an other side in the second direction; a plurality of heat generators arranged in the first direction in the housing; a plurality of fans arranged in the first direction in the housing, arranged on one side in the second direction with respect to the plurality of heat generators, and configured to generate an airflow on one side in the second direction in the housing; and an airflow restrictor positioned between the plurality of heat generators and the plurality of fans in the housing, in which the airflow restrictor includes a pair of guide portions arranged side by side with a first gap interposed therebetween in the first direction, each of the pair of guide portions has an airflow guide surface facing an other side in the second direction and inclined toward the first gap side, an inner side surface of the housing includes: a pair of first inner side surfaces facing each other in the first direction; and a pair of second inner side surfaces facing each other in the third direction, and a gap is provided between any one of the pair of first inner side surfaces and the pair of second inner side surfaces and the airflow restrictor.

(2) The electronic device according to (1), in which the guide portion has a triangular prism shape extending in the third direction.

(3) The electronic device according to (1), in which the guide portion has a plate shape with the airflow guide surface as a plate surface direction.

(4) The electronic device according to any one of (1) to (3), in which a ratio of a sum of dimensions of the pair of guide portions in the first direction to a distance between the pair of first inner side surfaces is 50% or more.

(5) The electronic device according to any one of (1) to (4), in which a ratio of a dimension of the guide portion in the second direction to a distance between the fan and the heat generator in the second direction is 50% or less.

(6) The electronic device according to any one of (1) to (5), in which a gap between the first inner side surface and the airflow restrictor is defined as a second gap, and a dimension of the first gap in the first direction is larger than a dimension of the second gap in the first direction.

(7) The electronic device according to any one of (1) to (6), in which a gap between the second inner side surface and the airflow restrictor is defined as a third gap, and a dimension of the first gap in the first direction is larger than a dimension of the third gap in the third direction.

(8) The electronic device according to any one of (1) to (7), in which a ratio of a dimension of the guide portion in the third direction to a distance between the pair of second inner side surfaces is 50% or more.

(9) The electronic device according to any one of (1) to (8), in which three or more of the fans are provided.

(10) The electronic device according to any one of (1) to (9), in which a seal member is disposed between the heat generators adjacent to each other.

(11) The electronic device according to (10), in which the seal member is a heat conductive sheet.

(12) The electronic device according to (10), in which the seal member is a sound absorbing material.