Air conditioner for vehicle

Abstract

The present invention relates to an air conditioner for a vehicle with a heat pump system structure, which has a simple piping structure and enhances heating performance, thereby reducing a package, and making common use with an air conditioner for an internal combustion engine possible. The air conditioner comprises a refrigerant circulation system which circulates refrigerant and exchanges heatbetween the refrigerant and inside air of an air-conditioning case in order to cool or heat the interior of the vehicle, a first heat exchanger for exchanging heat with refrigerant of the refrigerantcirculation system, the first heat exchanger raising temperature of coolant so as to use the coolant as a heating source for the interior of the vehicle; a second heat exchanger, which is disposed inside the air-conditioning case to heat air passing through the second heat exchanger, and in which coolant flows; a first coolant pipe, which connects the first heat exchanger and the second heat exchanger with each other and is a passage through which the coolant circulates; a second coolant pipe, which branches off from the first coolant pipe and exchanges heat with an engine; and a first valve system, which makes the coolant flowing in the first coolant pipe selectively flow to the second coolant pipe.

Description

technical field [0001] The present invention relates to an air conditioner for a vehicle, and more particularly, to an air conditioner for a vehicle having a heat pump system structure that switches the flow direction of a refrigerant with one refrigerant cycle so that cooling and heating can be selectively performed. Background technique [0002] Generally, a vehicle air conditioner includes a cooling system for cooling the interior of the vehicle and a heating system for heating the interior of the vehicle. The refrigeration system cools the interior of the vehicle by exchanging heat between the outside air passing through the evaporator and the refrigerant flowing inside the evaporator on the evaporator side of the refrigerant cycle and converting it into cold air. In addition, the heating system is configured to heat the interior of the vehicle by exchanging heat with the cooling water flowing inside the heating box on the heating core side where the cooling water circul...

AI Technical Summary

Problems solved by technology

The higher the voltage of the PTC, the thicker the thickness in the "T" direction. Therefore, the improvement of heating performance and the reduction in size are issues that cannot be solved at the same time.

[0009] In addition, the existing vehicle air conditioner uses a high-pressure side heat exchanger and a high-voltage PTC as an indoor condenser, so it cannot be shared with the existing air conditioner for an internal combustion engine, so there is a problem of increased production costs.

[0010] In addition, conventional vehicle air conditioners require separate defrosting lines and dehumidifying lines for the defrosting mode and the dehumidifying mode, so there is a problem that the overall piping configuration is complicated.

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