Outdoor unit, air-conditioning apparatus, and method for manufacturing outdoor units

Abstract

Heat exchanger assemblies included in an outdoor unit each include fins each having notches provided without fin collars or notches provided with fin collars that are shorter than stacking intervals between the fins. At least some of the stacking intervals between the fins in a facing surface are larger than the stacking intervals between the fins in surfaces excluding the facing surface.

1 . An outdoor unit comprising:
 a housing;   at least two plate fin-tube heat exchanger assemblies arranged side by side in the housing and each being bent in an inward direction of the housing such that the heat exchanger assembly has a facing surface that faces a surface of another heat exchanger assembly in the housing; and   a fan provided above the housing and causes air taken in from surfaces of the housing to be exhausted from an upper portion of the housing,   wherein each of the heat exchanger assemblies includes
 fins each having notches provided without fin collars or notches provided with fin collars that are shorter than stacking intervals between the fins, and 
   wherein at least some of the stacking intervals between the fins in a portion forming the facing surface are larger than the stacking intervals between the fins in portions forming surfaces excluding the facing surface.   
     
     
         2 . The outdoor unit of  claim 1 ,
 wherein, in a case where the heat exchanger assemblies are each bent substantially perpendicularly at least once,
 the stacking intervals between the fins in a portion of the facing surface that is nearer to an end are larger than the stacking intervals between the fins in another portion of the facing surface that is nearer to a bent portion. 
   
     
     
         3 . The outdoor unit of  claim 2 ,
 wherein each of the heat exchanger assemblies is bent along surfaces of the housing excluding one surface.   
     
     
         4 . The outdoor unit of  claim 1 ,
 wherein each of the heat exchanger assemblies includes flat tubes each having a flat cross-sectional shape are fitted in the notches provided in the fins, the flat cross-sectional shape being a shape in which long side thereof is linear while short side thereof is curved in a semicircular manner.   
     
     
         5 . The outdoor unit of  claim 4 ,
 wherein the fins each include a plurality of bridge-type cut-raised portions provided between the notches.   
     
     
         6 . The outdoor unit of  claim 4 ,
 wherein the fins are fixed to the flat tubes, which are fitted in the notches, by brazing or bonding.   
     
     
         7 . An air-conditioning apparatus comprising:
 the outdoor unit of  claim 1 ; and   an indoor unit connected to the outdoor unit.   
     
     
         8 . A method for manufacturing an outdoor unit including at least two fin-tube heat exchanger assemblies each being bent and having a facing surface that faces a surface of another heat exchanger assembly, the method comprising the steps of:
 in each of the at least two fin-tube heat exchanger assemblies, fitting fins onto a plurality of flat tubes from an open side of notches, the plurality of flat tubes being arranged side by side and capable of moving and positioning altogether in a long-axis direction, the fitting fins each having notches provided without fin collars or notches provided with fin collars that are shorter than stacking intervals between the fins;   adjusting at least some of the stacking intervals between the fins in a portion forming the facing surface so as to have larger stacking intervals than the stacking intervals between the fins in portions forming surfaces excluding the facing surface; and   assembling the at least two fin-tube heat exchanger assemblies by bending thereof.