Air conditioner for vehicle

An air conditioner for a vehicle, which has a structure that a pipe of a heat exchanger penetrates through a dash panel of the vehicle, the air conditioner comprising:

• a bracket for inserting and fixing the pipe;
• and a seal for fixing the bracket between an air-conditioning case and the seal to get in contact with the air-conditioning case;
• an expansion valve combined with a front of the bracket to connect pipes;
• and a pressure drop means for dropping pressure around the expansion valve to induce moisture into the air-conditioning case;
• wherein the bracket includes a negative pressure forming part having a flow passageway formed at one side to collect moisture around the expansion valve downwardly by forming negative pressure in the flow passageway.