Patent ID: 8991477
Filing Date: 2015-03-31
Classification: B60H,F25B,F28D

Abstract:
1. A refrigerant radiator used for a vapor compression refrigerant cycle including a compressor configured to compress and discharge refrigerant, and the refrigerant radiator being configured to radiate heat to air until gas-phase refrigerant discharged from the compressor changes at least to gas-liquid two-phase refrigerant, the refrigerant radiator comprising a plurality of tubes through which the refrigerant flows, the tubes being stacked and arranged in a horizontal direction, and extending in a direction perpendicular to the horizontal direction or with an angle from the horizontal direction, wherein the tubes include a first heat exchange area where refrigerant having a temperature equal to or higher than a standard temperature exchanges heat with first air to be blown to a space, and a second heat exchange area where refrigerant having a temperature lower than the standard temperature exchanges heat with second air to be blown to the space, the second air generally having a temperature different from a temperature of the first air; a heat exchanging portion including the tubes is configured to radiate heat until gas-phase refrigerant discharged from the compressor changes to liquid-phase refrigerant, and the tubes are inclined with an inclination angle θ between a flow direction of refrigerant flowing in the tubes and the horizontal direction, and are configured to satisfy the following formula, when the inclination angle θ is in a range from 0 to 90 degrees, in which X is a dryness degree of refrigerant at a predetermined position of the tubes where gas-liquid two-phase refrigerant flows, and Re is a Reynolds number at the predetermined position, which is calculated based on an average flow velocity (m/s) of refrigerant flowing in the tubes.