Air supply systems for vehicles

1. An air supply system for a vehicle, the air supply system comprising:

a first system including:

a first compressor configured to compress ambient air,

a heat exchanger connected to the first compressor to allow compressed air to flow therethrough, and

a first condenser connected to the heat exchanger; and

a second system including:

a second compressor configured to compress refrigerant,

a second condenser disposed at a rear end of the second compressor,

an expansion valve disposed at a rear end of the second compressor, and

an evaporator disposed at a rear end of the expansion valve,

wherein the second compressor, the second condenser, the expansion valve, and the evaporator of the second system are sequentially connected by a refrigerant flow line through which the refrigerant flows,

wherein a first refrigerant pipe of the first condenser in the first system is connected to a second refrigerant pipe of the evaporator in the second system, the second refrigerant pipe being connected to the refrigerant flow line,

wherein the second refrigerant pipe includes a main refrigerant pipe connected to the refrigerant flow line and an auxiliary refrigerant pipe branched from the main refrigerant pipe and then reconnected to the main refrigerant pipe, and

wherein the main refrigerant pipe and the auxiliary refrigerant pipe are connected to each other by a 3-way valve of the evaporator.

2. The air supply system of claim 1 , wherein the main refrigerant pipe and the first refrigerant pipe for the first condenser are connected by a 3-way valve of the first condenser.

3. The air supply system of claim 2 , wherein one end of the first refrigerant pipe for the first condenser is connected to the main refrigerant pipe by the 3-way valve of the first condenser and the other end thereof is connected to the refrigerant flow line.

4. The air supply system of claim 1 , wherein the first system further includes a receiving tank disposed between a rear end of the first compressor and the heat exchanger.

5. The air supply system of claim 4 , wherein the heat exchanger includes a first pipe portion connecting the receiving tank to the first condenser and a second pipe portion through which air discharged from the first condenser flows.

6. The air supply system of claim 5 , wherein the second pipe portion is disposed to pass through the first pipe portion.

7. The air supply system of claim 6 , wherein a drain valve configured to discharge moisture condensed in the first condenser is provided in the second pipe portion.

8. The air supply system of claim 7 , wherein the drain valve is disposed vertically below the first condenser.

9. The air supply system of claim 5 , further comprising a distributor connected to the first condenser, wherein the second pipe portion connects the first condenser to the distributor.

10. The air supply system of claim 5 , wherein the second pipe portion has a spiral shape that surrounds an outer surface of the first pipe portion.

11. The air supply system of claim 10 , wherein a cooling fin configured to increase heat transfer efficiency with the first pipe portion is provided in the second pipe portion.

12. The air supply system of claim 1 , wherein the first system is a pneumatic system.

13. The air supply system of claim 12 , wherein the pneumatic system is at least one of an air suspension system or an air sensor cleaning system.

14. The air supply system of claim 1 , wherein the second system is an air conditioning system for a vehicle.

15. The air supply system of claim 14 , wherein air introduced into the evaporator is provided to an interior of the vehicle after passing through the evaporator.

16. An air supply system for a vehicle, the air supply system comprising:

a first system including a first compressor configured to compress ambient air, a heat exchanger connected to the first compressor to allow compressed air to flow therethrough, and a first condenser connected to the heat exchanger; and

a second system including a second compressor configured to compress refrigerant, a second condenser disposed at a rear end of the second compressor, an expansion valve disposed at a rear end of the second compressor, and an evaporator disposed at a rear end of the expansion valve,

wherein the second compressor, the second condenser, the expansion valve, and the evaporator of the second system are connected by a refrigerant flow line through which a refrigerant flows, and

wherein the refrigerant flowing through the refrigerant flow line and the compressed air passing through the heat exchanger are heat-exchanged with each other.

17. An air supply system for a vehicle, the air supply system comprising:

a first system including:

a first compressor configured to compress ambient air,

a heat exchanger connected to the first compressor to allow compressed air to flow therethrough, and

a first condenser connected to the heat exchanger; and

a second system including:

a second compressor configured to compress refrigerant,

a second condenser disposed at a rear end of the second compressor,

an expansion valve disposed at a rear end of the second compressor, and

an evaporator disposed at a rear end of the expansion valve,

wherein the second compressor, the second condenser, the expansion valve, and the evaporator of the second system are sequentially connected by a refrigerant flow line through which the refrigerant flows,

wherein a first refrigerant pipe of the first condenser in the first system is connected to a second refrigerant pipe of the evaporator in the second system, the second refrigerant pipe being connected to the refrigerant flow line,

wherein the first system further includes a receiving tank disposed between a rear end of the first compressor and the heat exchanger, and

wherein the heat exchanger includes a first pipe portion connecting the receiving tank to the first condenser and a second pipe portion through which air discharged from the first condenser flows.