Abstract: A vehicular heat management system includes a refrigerant circulation line including a compressor, a high pressure side heat exchanger, a heat pump mode expansion valve, an outdoor heat exchanger, and a plurality of low pressure side heat exchangers installed parallel to each other. The refrigerant circulation line further includes a refrigerant pipe having an increased diameter portion formed by increasing the diameter of a specific refrigerant pipe portion among a plurality of refrigerant pipe portions affecting a refrigerant pressure in the refrigerant pipe portions on the intake and discharge sides of the compressor so that the specific refrigerant pipe portion has a larger diameter than other refrigerant pipe portions.

Abstract: The present invention may provide an air conditioner for a vehicle, which includes components of a compressor, a heat exchanger, and an expansion valve that are connected by pipes, including a bracket configured to fix the pipes to the components, wherein the bracket includes a body and a part extending from the body, a fastening part to which the component and pipe are fixed is formed on the part, and the fastening part includes a fastening member inserted into an assembly part of the pipe.

Abstract: The present invention relates to an air conditioner for a vehicle, which can improve a gear ratio of a power transmission means in order to operate a sliding door with more torque. The air conditioner for a vehicle includes: an air-conditioning case having a heat exchanger; a first door and a second door disposed inside the air-conditioning case to adjust the degree of opening of an air passageway; a first driving part for operating the first door; a power transmission part connected to the first driving part; a second driving part for operating the second door; and a third driving part for connecting the power transmission part with the second driving part.

Abstract: The present invention relates to an air conditioner for a vehicle, which includes an air-conditioning case (200), and at least one door (100) mounted to be opened and closed at a predetermined position, wherein the door (100) is formed integrally with an arm pivot (140), and the arm pivot (140) includes a pin part, and ribs formed integrally with both sides of the pin part to reinforce rigidity of the pin part and offset noise. The air conditioner further includes distortion preventing parts formed on a rotary shaft to be dented and to be crossed to each other, thereby reducing a transformation rate of the door and securing accuracy of the pin part.

Abstract: The present invention relates to an air conditioner for a vehicle, which includes an air-conditioning case (200), and at least one door (100) mounted to be opened and closed at a predetermined position, wherein the door (100) is formed integrally with an arm pivot (140), and the arm pivot (140) includes a pin part, and ribs formed integrally with both sides of the pin part to reinforce rigidity of the pin part and offset noise. The air conditioner further includes distortion preventing parts formed on a rotary shaft to be dented and to be crossed to each other, thereby reducing a transformation rate of the door and securing accuracy of the pin part.

Abstract: The present invention relates to an air conditioner for a vehicle, which includes an air-conditioning case (200), and at least one door (100) mounted to be opened and closed at a predetermined position, wherein the door (100) is formed integrally with an arm pivot (140), and the arm pivot (140) includes a pin part, and ribs formed integrally with both sides of the pin part to reinforce rigidity of the pin part and offset noise. The air conditioner further includes distortion preventing parts formed on a rotary shaft to be dented and to be crossed to each other, thereby reducing a transformation rate of the door and securing accuracy of the pin part.

Abstract: Disclosed is an air conditioner for a vehicle, which makes it possible for an upper case and a lower case to be assembled in correct position without minute misassembly between the upper case and the lower case, thereby making operation of a sliding door smooth. The air conditioner, which includes an air-conditioning case having a plurality of cases and a door disposed inside the air-conditioning case to be able to slide, further includes: a shape-matching part where the plurality of cases are matched each other in shape; and a guide part crossing the shape-matching part to guide a sliding action of the door, wherein a cross section of the guide part at the shape-matching part is formed to be eccentric.

Abstract: The present invention relates to a blower unit of an air conditioner for a vehicle, which can enhance air-conditioning performance through uniform upper and lower pressure control since compensating and supplementing different air resistances between an upper scroll case and a lower scroll case. The blower unit of the two-layered air conditioner for a vehicle, which separates and blows indoor air and outdoor air, includes: a first scroll in which a first blower wheel is disposed and a first air passageway is formed; and a second scroll arranged below the first scroll, and having a second blower wheel and a second air passageway, wherein a diameter of the second blower wheel and a diameter of the first blower wheel are different from each other.

Abstract: Disclosed is an air conditioner for a vehicle, which makes it possible for an upper case and a lower case to be assembled in correct position without minute misassembly between the upper case and the lower case, thereby making operation of a sliding door smooth. The air conditioner, which includes an air-conditioning case having a plurality of cases and a door disposed inside the air-conditioning case to be able to slide, further includes: a shape-matching part where the plurality of cases are matched each other in shape; and a guide part crossing the shape-matching part to guide a sliding action of the door, wherein a cross section of the guide part at the shape-matching part is formed to be eccentric.

Abstract: The present invention relates to an air conditioner for a vehicle, which can improve a gear ratio of a power transmission means in order to operate a sliding door with more torque. The air conditioner for a vehicle includes: an air-conditioning case having a heat exchanger; a first door and a second door disposed inside the air-conditioning case to adjust the degree of opening of an air passageway; a first driving part for operating the first door; a power transmission part connected to the first driving part; a second driving part for operating the second door; and a third driving part for connecting the power transmission part with the second driving part.

Abstract: The present invention relates to an air conditioner for a vehicle, which includes an air-conditioning case (200), and at least one door (100) mounted to be opened and closed at a predetermined position, wherein the door (100) is formed integrally with an arm pivot (140), and the arm pivot (140) includes a pin part, and ribs formed integrally with both sides of the pin part to reinforce rigidity of the pin part and offset noise. The air conditioner further includes distortion preventing parts formed on a rotary shaft to be dented and to be crossed to each other, thereby reducing a transformation rate of the door and securing accuracy of the pin part.

Abstract: An air conditioning system for motor vehicles includes an air conditioner case having an external air introduction port and an internal air introduction port, an intake door rotatably installed in the air conditioner case so as to open the external air introduction port in an external air mode and open the internal air introduction port in an internal air mode, a blower configured to draw an internal air or an external air through the external air introduction port or the internal air introduction port and to blow the internal air or the external air into a vehicle room, and a control unit configured to control the intake door to move in such a direction as to close the external air introduction port and to restrain entry of rainwater into the external air introduction port, if a rotation speed level of the blower satisfies a predetermined condition in the external air mode.