Patent ID: 7918098
Filing Date: 2011-04-05
Classification: F25B

Abstract:
1. An air conditioning system, comprising: a compressor for compressing refrigerant; a condenser for condensing the refrigerant discharged from the compressor; a first expansion device for throttling the refrigerant passed through the condenser; a second expansion device for throttling the refrigerant passed through the first expansion device; an injection valve for throttling the refrigerant bypassed between the first expansion device and the second expansion device and injecting into the compressor; a control unit for controlling such that the ratio of a liquid refrigerant in the refrigerant injected into the compressor is less than a predetermined value; and an injection heat exchanger for performing heat exchange between the refrigerant passed through the injection valve and the refrigerant introduced into the second expansion device when the air conditioning system is in a heating operation, wherein the injection heat exchanger is installed at a base pan of an outdoor unit included in the air conditioning system, and disposed in parallel to the base pan, wherein an outdoor heat exchanger of the outdoor unit is disposed perpendicular to the base pan and is spaced apart from the injection heat exchanger, wherein the injection heat exchanger comprises a first refrigerant pipe for passing either the refrigerant passed through the injection valve or the refrigerant introduced into the second expansion device through and a second refrigerant pipe formed so as to cover the first refrigerant pipe and for passing the other refrigerant through, wherein the injection heat exchanger is formed in a loop shape by being bent multiple times.