The invention discloses a throttling device for an air conditioner
check valve, which comprises a compressor, a four-way valve, a condenser and an
evaporator, wherein the compressor, the four-way valve, the condenser and the
evaporator are communicated circularly by pipelines, and a conveying pipeline for connecting the condenser and the
evaporator is provided with a
refrigeration throttling device close to the evaporator. The throttling device is characterized in that the
refrigeration throttling device is one or more parallel
check valve devices with a throttling device, and the conduction direction of the throttling device with the throttling function is appointed to the condenser. Therefore, the throttling device with the throttling function has the function and the
advantage of a
nozzle throttle and the
check valve, so that the cooling capability of the condenser is improved when the air conditioner is under the
refrigeration working state, the refrigeration amount of the air conditioner is increased, and the
power consumption of the air conditioner is lowered; when the air conditioner is under the heating working state, high-pressure liquid
refrigerant output by the evaporator is prevented from quickly vaporizing so as to lower heating amount to improve the heating capability of the air conditioner; and the air conditioner is guaranteed to avoiding two-phase flow
noise in the refrigerating and heating process.