Heat exchanger and refrigeration cycle apparatus

Abstract

In a heat exchanger, when a lower surface of the first heat transfer tube is horizontal, in a vertical cross section perpendicular to a direction in which the first heat transfer tube passes through a first fin, upper surfaces of the first and second heat transfer tubes are inclined downward, an upper end of the second heat transfer tube is higher than the lower surface of the first heat transfer tube, and an intersecting point A at which an extension line of the upper surface of the second heat transfer tube and an extension line of the lower surface of the first heat transfer tube intersect is closer to the second heat transfer tube than is an intersecting point B at which the extension line of the upper surface of the second heat transfer tube and an extension line of a lower surface of the second heat transfer tube intersect.

1 . A heat exchanger, comprising:
 a first fin having a first end and a second end in a lateral direction;   a second fin having a third end and a fourth end in the lateral direction, the third end being positioned to face the second end;   a first heat transfer tube positioned away from the first end by a first predetermined interval and passing through the first fin; and   a second heat transfer tube positioned away from the third end by a second predetermined interval and passing through the second fin,   the first heat transfer tube having a planar or curved first upper surface and a planar first lower surface,   the second heat transfer tube having a planar or curved second upper surface and a planar second lower surface,   when the first upper surface is defined as a first surface in a case where the first upper surface has a planar shape, a tangent plane of the first upper surface is defined as a first surface in a case where the first upper surface has a curved shape, the second upper surface is defined as a second surface in a case where the second upper surface has a planar shape, and a tangent plane of the second upper surface is defined as a second surface in a case where the second upper surface has a curved shape, and   when the first heat transfer tube and the second heat transfer tube are viewed in such a manner that the first lower surface is horizontal,   in a vertical cross section perpendicular to a direction in which the first heat transfer tube passes through the first fin,   the first surface being inclined downward toward the first end,   the second surface being inclined downward toward the third end,   an upper end of the second heat transfer tube being located higher than the first lower surface,   an intersecting point A at which the second surface or an extension line of the second surface and an extension line of the first lower surface intersect being located closer to the second heat transfer tube than is an intersecting point B at which the second surface or the extension line of the second surface and an extension line of the second lower surface intersect.   
     
     
         2 . The heat exchanger of  claim 1 , wherein when the first heat transfer tube and the second heat transfer tube are viewed in such a manner that the first lower surface is horizontal, the second lower surface is inclined downward toward the third end. 
     
     
         3 . (canceled) 
     
     
         4 . A refrigeration cycle apparatus, comprising:
 the heat exchanger of  claim 1 ; and   a fan configured to supply air to the heat exchanger from the first end along the first lower surface,   the heat exchanger being installed in such a manner that the first surface is inclined downward toward the first end, and the second surface is inclined downward toward the third end.   
     
     
         5 . The refrigeration cycle apparatus of  claim 4 , wherein the heat exchanger is installed in such a manner that the first lower surface is horizontal or is inclined downward toward the first end.