초록 ▼

An electric connection box according to the present invention can include a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface, a case housing the circuit board, the circuit board oriented in a substantially vertical

An electric connection box according to the present invention can include a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface, a case housing the circuit board, the circuit board oriented in a substantially vertical direction, a vertical inner wall surface of the case formed opposite the non-mounting surface of said circuit board, the vertical inner wall and the non-mounting surface of said circuit board defining a substantially vertical air ventilation path, a suction port positioned in the case and in communication with the ventilation path, an exhaust port positioned in the case above said suction port and in communication with the ventilation path, and a heat generating component in communication with the ventilation path.

대표청구항 ▼

1. An electric connection box, comprising: a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface;a case housing the circuit board, the circuit board oriented in a substantially vertical direction;a vertical inner wall

1. An electric connection box, comprising: a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface;a case housing the circuit board, the circuit board oriented in a substantially vertical direction;a vertical inner wall surface of the case formed opposite the second surface of said circuit board, the vertical inner wall surface and the second surface of said circuit board defining a substantially vertical air ventilation path;a first suction port and a second suction port positioned in said case and in communication with said ventilation path, wherein the first suction port is positioned in a bottom portion of the case and the second suction port is positioned in a lower side portion of the case and the first suction port and the second suction port are configured such that air that passes through the first suction port and air that separately passes through the second suction port converges before or in the ventilation path;a first exhaust port and a second exhaust port positioned in said case above said positions of the first suction port and the second suction port in an upper side portion of the case and in communication with said ventilation path, the first exhaust port laterally penetrating the vertical inner wall surface of the case, the second exhaust port laterally penetrating the case opposite the first exhaust port with respect to the ventilation path, and each of the first exhaust port and the second exhaust port having an opening area larger than an opening area of each of the first suction port and the second suction port;a bulged section provided on the case, the first suction port is positioned on a bottom surface of the bulged section and the second suction port is positioned on a side surface of the bulged section; anda heat generating component positioned in the bulged section and in communication with said ventilation path; whereinair flow through the air ventilation path is created by natural convection. 2. The electric connection box according to claim 1, wherein said heat generating component is positioned on the bottom portion of said case. 3. The electric connection box according to claim 2, wherein said electronic component includes a terminal capable of being mounted on said circuit board, said electronic component is mounted on said circuit board with said terminal penetrated to the second surface from the first surface of said circuit board, and a tip end of the terminal of said electronic component is in communication with said ventilation path. 4. The electric connection box according to claim 3, wherein the bottom surface of the bulged section defines a bottom wall of said case. 5. The electric connection box according to claim 1, wherein said heat generating component is connected to a bus bar connected to said circuit board. 6. The electric connection box according to claim 5, wherein an insulating film is formed on the bus bar except for on a connecting portion with said heat generating component. 7. The electric connection box according to claim 6, wherein said case is provided with an opening in an area opposed to said bus bar, and wherein a heat dissipating member is bonded to said bus bar via an insulative bonding layer and the heating dissipating member is positioned in said opening. 8. The electric connection box according to claim 7, wherein on a second side wall of said case opposed to the first surface of said circuit board includes a fitting portion capable of connecting to an electrical component from an outside, and on the first surface of said circuit board, a connection terminal for connecting to said electrical component is placed in a state in which the connection terminal faces an inside of said fitting portion. 9. The electric connection box according to claim 8, wherein on an inner wall surface of said case opposed to the second surface of said circuit board, a support member which abuts on said circuit board from said second surface side when a force toward said second surface side from said first surface side of said circuit board is applied to said connection terminal is provided. 10. The electric connection box according to claim 9, wherein said support member is a boss formed integrally with said case. 11. The electric connection box according to claim 10, wherein a plurality of said bosses are formed, and a plurality of said bosses are formed to be aligned in a vertical direction. 12. The electric connection box according to claim 9. wherein said support member is a support wall formed integrally with said case, and said support wall is formed to extend in the vertical direction. 13. The electric connection box according to claim 1, wherein said electronic component includes a terminal capable of being mounted on said circuit board, said electronic component is mounted on said circuit board with said terminal penetrated to the second surface side from the first surface of said circuit board, and a tip end of the terminal of said electronic component is positioned in said ventilation path. 14. The electric connection box according to claim 1, wherein the bottom surface of the bulged section defines a bottom wall of said case. 15. The electric connection box according to claim 1, wherein on a side wall of said case opposed to the first surface of said circuit board includes a fitting portion capable of connecting to an electrical component from an outside, and on the first surface of said circuit board, a connection terminal for connecting to said electrical component is positioned so that the connection terminal faces an inside of said fitting portion. 16. The electric connection box according to claim 15, wherein on an inner wall surface of said case opposed to the second surface of said circuit board, a support member which abuts on said circuit board from a side of said second surface when a force toward the side of said second surface from a side of said first surface of said circuit board is applied to said connection terminal is provided. 17. The electric connection box according to claim 16, wherein said support member is a boss formed integrally with said case. 18. The electric connection box according to claim 16, wherein said support member is a support wall formed integrally with said case, and said support wall extends in the vertical direction. 19. The electric connection box according to claim 1, wherein the first suction port extends further in a lateral direction than any other direction and the second suction port extends further in a vertical direction than any other direction. 20. An automotive electric connection box for use in an automobile, comprising: a circuit board having a first surface capable of mounting an electronic component, and a second surface defining a non-mounting surface;a case housing the circuit board, the circuit board oriented in a substantially vertical direction;a vertical inner wall surface of the case formed opposite the second surface of said circuit board, the vertical inner wall surface and the second surface of said circuit board defining a substantially vertical air ventilation path;a first suction port and a second suction port positioned in the case in communication with a bottom end of the ventilation path, wherein the first suction port is positioned in a bottom portion of the case and the second suction port is positioned in a lower side portion of the case and the first suction port and the second suction port are configured such that air that passes through the first suction port and air that separately passes through the second suction port converges before or in the ventilation path;a first exhaust port and a second exhaust port positioned in the case in communication with a top end of the ventilation path and in an upper side portion of the case, the first exhaust port laterally penetrating the vertical inner wall surface of the case, the second exhaust port laterally penetrating the case opposite the first exhaust port with respect to the ventilation path, and each of the first exhaust port and the second exhaust port having an opening area larger than an opening area of each of the first suction port and the second suction port;a bulged section provided on the case, the first suction port is positioned on a bottom surface of the bulged section and the second suction port is positioned on a side surface of the bulged section; anda heat generating component positioned in the bulged section and between the plurality of suction ports and the bottom end of the ventilation path, whereinthe automotive electric connection box controls on-vehicle electrical components; andair flow through the air ventilation path is created by natural convection.