Heat exchanger and refrigeration cycle apparatus

Abstract

A heat exchanger includes a first header, a second header and a plurality of heat transfer components, wherein the heat transfer components each includes a heat transfer tube extending from the first header to the second header and allowing refrigerant to flow in its inside, and an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein the extension portion includes a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows, and a spacer portion extending from the base portion in the first direction and abutting the adjacent heat transfer component.

1 . A heat exchanger comprising:
 a first header being configured to collect and deliver refrigerant and extending in a first direction;   a second header being configured to collect and deliver refrigerant, being disposed at a position facing the first header and extending in the first direction; and   a plurality of heat transfer components each extending from the first header to the second header and being provided at intervals along the first direction, wherein the heat transfer components each includes   a heat transfer tube extending from the first header to the second header and allowing refrigerant to flow in its inside; and   an extension portion being provided in each of the heat transfer tubes and configured to promote heat transfer property of the heat transfer tubes, and wherein   the extension portion includes   a base portion extending from the heat transfer tube in a second direction in which air that flows between the plurality of heat transfer tubes flows; and   a plurality of spacer portions each extending from the base portion in the first direction and abutting the adjacent heat transfer component, wherein   tip ends of the plurality of spacer portions extending such that the tip ends face each other.   
     
     
         2 . The heat exchanger of  claim 1 , wherein the spacer portion is a portion of the base portion that is bent to extend in the first direction. 
     
     
         3 . The heat exchanger of  claim 2 , wherein the spacer portion is formed by giving a cut to the base portion in the second direction. 
     
     
         4 . The heat exchanger of  claim 2 , wherein the spacer portion is formed by giving a cut to the base portion in a third direction in which the heat transfer tube extends. 
     
     
         5 . The heat exchanger of  claim 1 , wherein the spacer portion is a portion of the base portion that is cut and raised to extend in the first direction. 
     
     
         6 . The heat exchanger of  claim 5 , wherein the spacer portion is formed by giving a cut to the base portion in the second direction. 
     
     
         7 . The heat exchanger of  claim 5 , wherein the spacer portion is formed by giving a cut to the base portion in a third direction in which the heat transfer tube extends. 
     
     
         8 . The heat exchanger of  claim 5 , wherein the spacer portion is formed in a burring shape by punching a hole in the base portion. 
     
     
         9 . The heat exchanger of  claim 1 , wherein a plurality of the spacer portions are provided and disposed at positions symmetrical to a center of the heat transfer tube. 
     
     
         10 . The heat exchanger of  claim 1 , wherein the spacer portion abuts the heat transfer tube. 
     
     
         11 . The heat exchanger of  claim 1 , wherein the spacer portion abuts the extension portion. 
     
     
         12 . The heat exchanger of  claim 1 , wherein the spacer portion abuts the first header or the second header. 
     
     
         13 . The heat exchanger of  claim 1 , wherein a plurality of the spacer portions are provided and located at equal intervals along a third direction in which the heat transfer tube extends. 
     
     
         14 . The heat exchanger of  claim 1 , wherein
 a plurality of the spacer portions are provided, and   a number of the spacer portions is greater on a downstream side of the heat transfer tube than on an upstream side thereof.   
     
     
         15 . The heat exchanger of  claim 1 , wherein the spacer portion is formed in an embossed shape extending in the first direction and then bent back. 
     
     
         16 . The heat exchanger of  claim 1  , wherein a plurality of the heat transfer tubes are provided along the second direction. 
     
     
         17 . A refrigeration cycle apparatus, wherein the heat exchanger of  claim 1  functions as a condenser or an evaporator.