| 摘要 |
A refrigerant radiator for a heat pump cycle includes a plurality of tubes. The tubes are disposed to satisfy the following relationship: Re>=A×X6+□B×X5+C×X4+D×X3+E×X2+F×X+□G wherein theta is an inclination angle formed by a flow direction of the refrigerant flowing through the tubes and the horizontal direction; X is a dryness of the refrigerant in a predetermined position; and Re is a Reynolds number of the refrigerant in the predetermined position determined from an average flow velocity of the refrigerant flowing through the tube. The A to G are expressed by a function of theta, which suppresses the non-uniform loss in pressure of the refrigerant in the respective tubes to reduce the difference in temperature of blown air in the refrigerant radiator.
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