Electronic device

Abstract

According to one embodiment, an electronic device includes a housing including an opening, a partition wall which partitions an interior part of the housing into a first chamber and a second chamber which is opened to the outside through the opening, first and second heat generating parts mounted in the first chamber, a first heat radiation member located in the second chamber, a heat transfer member which transfers heat generated by the first heat generating part, a cooling fan which draws outside air and exhausts the air against the first heat radiation member, a second heat radiation member which is exposed to the outside of the housing and is thermally connected to the second heat generating part, and a cover covering the opening and the second heat radiation member. The cover forms a gap between the cover and the housing. The gap communicates with the second chamber.

1 . An electronic device comprising:
 a housing including an opening and an exhaust hole;   a partition wall which partitions an interior part of the housing into a first chamber and a second chamber, the second chamber communicating with the exhaust hole and being opened to the outside of the housing through the opening;   a first heat generating part mounted in the first chamber of the housing;   a second heat generating part mounted in the first chamber of the housing;   a first heat radiation member located in the second chamber of the housing;   a heat transfer member provided to pass through the partition wall, the heat transfer member transferring heat generated by the first heat generating part to the first heat radiation member;   a cooling fan located in the second chamber, the cooling fan drawing outside air through the opening of the housing and exhausting the drawn outside air against the first heat radiation member;   a second heat radiation member which is exposed to the outside of the housing and is thermally connected to the second heat generating part; and   a cover mounted on the housing to cover the opening of the housing and the second heat radiation member, the cover forming a gap between the cover and the housing, the gap communicating with the second chamber through the opening, and allowing the outside air to flow therethrough.   
   
   
       2 . The electronic device according to  claim 1 , wherein the cover includes an intake hole which allows the gap between the cover and the housing to communicate with the outside of the electronic device. 
   
   
       3 . The electronic device according to  claim 2 , wherein the intake hole of the cover is formed in a region of the cover, which is different from a region of the cover corresponding in position to the opening of the housing. 
   
   
       4 . The electronic device according to  claim 1 , wherein the housing includes another opening which communicates with the first chamber, and the second heat radiation member is removably mounted on the housing and closes the other opening of the housing. 
   
   
       5 . The electronic device according to  claim 4 , further comprising a sealing member which surrounds the other opening of the housing and is interposed between the housing and the second heat radiation member. 
   
   
       6 . The electronic device according to  claim 5 , wherein a rib is provided at the edge of the other opening of the housing, the rib being raised toward the outside of the housing, and the sealing member is compressed between the housing and the second heat radiation member so as to wrap the top end of the rib. 
   
   
       7 . The electronic device according to  claim 5 , further comprising:
 a screw which fixes the second heat radiation member to the housing, wherein   the second heat radiation member includes a through hole into which the screw is inserted in a region closer to the edge of the second radiation member than a region contacting the sealing member, and   the housing includes a wall, and a screw hole reaching the mid-point of the wall as viewed in thickness direction thereof, corresponding in position to the through hole of the second heat radiation member and receiving the screw.   
   
   
       8 . The electronic device according to  claim 1 , further comprising a sealing member provided in an areal region of the partition wall through which the heat transfer member passes, the sealing member liquid-tightly isolating the first chamber of the housing from the second chamber thereof. 
   
   
       9 . The electronic device according to  claim 1 , wherein the housing is provided with a leg which protrudes toward the outside of the electronic device compared with the cover, and the cover is mounted on the lower surface of the housing. 
   
   
       10 . The electronic device according to  claim 9 , wherein the cover is provided with another leg which protrudes toward the outside of the electronic device. 
   
   
       11 . The electronic device according to  claim 1 , further comprising a holding member interposed between the housing and the cover, the holding member holding a gap formed between the housing and the cover. 
   
   
       12 . An electronic device comprising:
 a case;   a first heat generating part mounted in the case;   a second heat generating part mounted in the case;   a first heat radiation member located outside the case;   a heat transfer member which transfers heat generated by the first heat generating part to the first heat radiation member;   a cooling fan located outside the case, and including an intake port and an exhaust port, the exhaust port corresponding in position to the first heat radiation member;   a second heat radiation member which is exposed to the outside of the case and is thermally connected to the second heat radiation part; and   a cover mounted on the case, the cover covering the first heat radiation member, the cooling fan and the second heat radiation member, and forming an air passage which allows a space of the vicinal portion of the second heat radiation member to communicate with the intake port of the cooling fan, between the cover and the housing.   
   
   
       13 . The electronic device according to  claim 12 , wherein the case has a wall, and the wall includes a hollow part which is hollow toward the inside of the case and which receives the first heat radiation member and the cooling fan. 
   
   
       14 . The electronic device according to  claim 13 , wherein the wall of the case includes an exhaust hole which allows the hollow part to communicate with the outside of the electronic device, and the cover includes an intake hole which allows the air passage to communicate with the outside of the electronic device. 
   
   
       15 . The electronic device according to  claim 14 , wherein the intake hole of the cover is formed in a region which is different from a region of the cover corresponding in position to the cooling fan.