1. A cooling system for an electric vehicle comprising:
a box disposed in a lower portion of a vehicle interior and including an air inlet and an air outlet;
an electrical component disposed in the box and having a heat dissipating fin;
a cooling duct attached to the electrical component and covering the heat dissipating fin;
a fan case coupled to an air outlet portion of the cooling duct and having therein a fan for drawing air; and
an exhaust air duct disposed in the air outlet of the box and extending into the box, an air discharge port of the fan case facing an air inlet of the exhaust air duct with a predetermined gap therebetween in a direction of air flow, wherein
when the air discharge port of the fan case is projected on a plane including the air inlet of the exhaust air duct, the air discharge port of the fan case is opened inside the air inlet of the exhaust air duct and a predetermined gap is formed in a transverse direction to the air flow between the air discharge port of the fan case and the air inlet of the exhaust air duct, and hot air remaining inside the box is discharged to outside the vehicle interior by a negative pressure generated by a gap formed between the fan case and the exhaust air duct.
2. A cooling method for an electrical component in an electric vehicle including a box disposed in a lower portion of a vehicle interior and including an air inlet and an air outlet; an electrical component disposed in the box and having a heat dissipating fin; a cooling duct attached to the electrical component and covering the heat dissipating fin; a fan case coupled to an air outlet portion of the cooling duct and having therein a fan for drawing air, and an exhaust air duct disposed in the air outlet of the box and extending into the box, an air discharge port of the fan case facing an air inlet of the exhaust air duct with a predetermined gap therebetween in a direction of air flow, the method comprising:
setting a predetermined space formed between the air discharge port of the fan case and the air inlet of the exhaust air duct such that the relationship P1>P2>P3 is satisfied when the air drawn by the fan flows from the air discharge port of the fan case to the air inlet of the exhaust air duct, where P1 represents a pressure inside the fan case, P2 represents a pressure around the fan case, and P3 represents a pressure inside the exhaust air duct, and hot air remaining inside the box is discharged to outside the vehicle interior by a negative pressure generated by a gap formed between the fan case and the exhaust air duct.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A vacuum pump system for delivering gas mixtures with large portions of light gases from a receiver, the vacuum pump system comprising at least one first high-vacuum pump having an inlet thereof connected with the receiver; at least one fore-vacuum pump for compressing the gas mixture to atmospheric pressure; at least one second high-vacuum pump arranged downstream of the first high-vacuum pump and upstream of the fore-vacuum pump and having an inlet thereof connected directly with an outlet of the first high-vacuum pump and an outlet thereof communicating with an inlet of the at least one fore-vacuum pump, and having a suction capacity of at least 50% of the suction capacity of the at least one first vacuum pump.
2. A vacuum pump system according to claim 1, comprising several second high-vacuum pumps arranged between the at least one first high-vacuum pump and connected one of parallel to each other and in series with each other.
3. A vacuum pump system according to claim 1, wherein the at least one second high-vacuum pump is formed as a molecular pump.
4. A vacuum pump system according to claim 3, wherein the molecular pump is a turbomolecular pump.