At least during a heating operation a control device controls the degree of opening of a second throttle device and/or a third throttle device on the basis of the discharge refrigerant temperature, which is the detection value from a discharge refrigerant temperature detection device, or on the basis of a value calculated using this discharge refrigerant temperature, and thus causes a compressor to draw in a refrigerant having a degree of dryness of 0.9-0.99.