Heat exchanger and air-conditioner

Abstract

Provided is a heat exchanger which includes: a flat pipe as a heat transfer pipe in which refrigerant flows; and multiple fins having openings for inserting the flat pipe and arranged at a predetermined interval in a length direction of the flat pipe. At the flat pipe, multiple linear cutouts used for positioning the multiple fins are formed at the predetermined interval in the length direction of the flat pipe, and at least part of an edge of each opening contacts a corresponding one of the cutouts.

What is claimed is: 
     
         1 . A heat exchanger comprising:
 a flat pipe as a heat transfer pipe in which refrigerant flows; and   multiple fins having openings for inserting the flat pipe and arranged at a predetermined interval in a length direction of the flat pipe,   wherein at the flat pipe, multiple linear cutouts used for positioning the multiple fins are formed at the predetermined interval in the length direction of the flat pipe, and   at least part of an edge of each opening contacts a corresponding one of the cutouts.   
     
     
         2 . The heat exchanger according to  claim 1 , wherein
 at least part of the edge of each opening contacts a bottom surface of a corresponding one of the cutouts.   
     
     
         3 . The heat exchanger according to  claim 2 , wherein
 each of the multiple cutouts is in a V-shape as viewed in a longitudinal section of the flat pipe,   two inclined surfaces defining the V-shape include a first inclined surface inclined such that a depth of each cutout increases toward one end side in the length direction of the flat pipe, and a second inclined surface having a greater inclination angle than an inclination angle of the first inclined surface with respect to the length direction of the flat pipe and inclined such that the depth of each cutout decreases toward the one end side,   each opening has a fin collar curved to the one end side, and   at least part of an edge of the fin collar contacts the bottom surface of the V-shaped cutout.   
     
     
         4 . The heat exchanger according to  claim 1 , wherein
 at least part of the edge of each opening contacts other surfaces of a corresponding one of the cutouts than the bottom surface.   
     
     
         5 . The heat exchanger according to  claim 4 , wherein
 a thickness tl of a planar portion present between adjacent ones of the cutouts in the length direction of the flat pipe, an opening distance L of each opening in a direction perpendicular to a plane of the planar portion, and a distance t 2  between the bottom surfaces of opposing ones of the cutouts in the direction perpendicular to the plane of the planar portion are in a magnitude relationship represented by tl >L >t 2 .   
     
     
         6 . The heat exchanger according to  claim 5 , wherein
 each of the multiple cutouts is in a V-shape as viewed in a longitudinal section of the flat pipe,   two inclined surfaces defining the V-shape include a first inclined surface inclined such that a depth of each cutout increases toward one end side in the length direction of the flat pipe, and a second inclined surface having a greater inclination angle than an inclination angle of the first inclined surface with respect to the length direction of the flat pipe and inclined such that the depth of each cutout decreases toward the one end side,   each opening has a fin collar curved to the one end side, and   at least part of an edge of the fin collar contacts the first inclined surface.   
     
     
         7 . The heat exchanger according to  claim 1 , wherein
 each of the multiple cutouts is in a curved shape as viewed in a longitudinal section of the flat pipe,   each opening has a fin collar curved to roll back to one end side in the length direction of the flat pipe, and   at least part of an edge of the fin collar contacts a corresponding one of the cutouts.   
     
     
         8 . The heat exchanger according to  claim 1 , wherein
 at least one predetermined interval between adjacent ones of the cutouts is different from at least one of other predetermined intervals.   
     
     
         9 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 1 .   
     
     
         10 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 2 .   
     
     
         11 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 3 .   
     
     
         12 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 4 .   
     
     
         13 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 5 .   
     
     
         14 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 6 .   
     
     
         15 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 7 .   
     
     
         16 . An air-conditioner comprising:
 a refrigerant circuit in which refrigerant circulates sequentially in a compressor, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger,   wherein external air is sent to the outdoor heat exchanger by an outdoor fan,   air in an air-conditioning target space is sent to the indoor heat exchanger by an indoor fan, and   at least one of the outdoor heat exchanger or the indoor heat exchanger is the heat exchanger according to  claim 8 .