Outdoor unit and indoor unit of air-conditioning apparatus

Abstract

An outdoor unit of an air-conditioning apparatus including a casing forming an outer shell, a fan inside the casing, configured to suck outside air from an air inlet and exhaust outside air from an air outlet, and a heat exchanger inside the casing. The heat exchanger includes a first heat exchanger main body including plural fins arranged in parallel at an interval and plural flat pipes passing through the plural fins in a direction of parallel arrangement of the plural fins, refrigerant flowing inside the plural flat pipes, and a second heat exchanger main body including plural fins arranged in parallel at an interval and plural circular pipes passing through the plural fins in a direction of parallel arrangement of the plural fins, refrigerant flowing inside the plural circular pipes, the first heat exchanger main body arranged closer to the fan than the second heat exchanger main body.

1 . An outdoor unit of an air-conditioning apparatus, comprising:
 a casing having an air inlet and an air outlet, and forming an outer shell;   a fan provided inside the casing, and configured to suck outside air from the air inlet and exhaust the outside air from the air outlet; and   a heat exchanger provided inside the casing, and configured to exchange heat between the outside air sucked by the fan and refrigerant,   the heat exchanger including
 a first heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of flat pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of flat pipes, and 
 a second heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of circular pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of circular pipes, 
   the first heat exchanger main body being arranged closer to the fan than is the second heat exchanger main body.   
     
     
         2 . The outdoor unit of an air-conditioning apparatus of  claim 1 , further comprising:
 a header connected to an upstream side of the first heat exchanger main body in a heating operation; and   a distributor connected to an upstream side of the second heat exchanger main body in the heating operation through a capillary tube.   
     
     
         3 . The outdoor unit of an air-conditioning apparatus of  claim 1 , further comprising a quality control device provided on an upstream side of the heat exchanger in a heating operation, and configured to control a quality of the refrigerant. 
     
     
         4 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein the first heat exchanger main body and the second heat exchanger main body are arranged in an up-and-down direction on a front view, the first heat exchanger main body is arranged on or above the second heat exchanger main body, and the first heat exchanger main body and the second heat exchanger main body are connected in series through an intermediate header. 
     
     
         5 . The outdoor unit of an air-conditioning apparatus of  claim 4 , wherein the outdoor unit is of top flow type having the air outlet formed in an upper surface of the casing. 
     
     
         6 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein the first heat exchanger main body and the second heat exchanger main body are arranged in a fore-and-aft direction on a front view. 
     
     
         7 . The outdoor unit of an air-conditioning apparatus of  claim 6 , wherein the outdoor unit is of side flow type having the air outlet formed in a side surface of the casing. 
     
     
         8 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein at least any one of the first heat exchanger main body and the second heat exchanger main body has a mechanism of controlling a flow rate of the refrigerant flowing through the first heat exchanger main body and the second heat exchanger main body in a heating operation. 
     
     
         9 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein a distributing device is connected to at least one of an upstream side and a downstream side of the first heat exchanger main body and the second heat exchanger main body in a heating operation over the first heat exchanger main body and the second heat exchanger main body. 
     
     
         10 . The outdoor unit of an air-conditioning apparatus of  claim 1 , further comprising an anticorrosion sheet inserted between the first heat exchanger main body and the second heat exchanger main body. 
     
     
         11 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein the first heat exchanger main body and the second heat exchanger main body are made of an identical material. 
     
     
         12 . The outdoor unit of an air-conditioning apparatus of  claim 1 , wherein heat transfer pipes of at least one of the first heat exchanger main body and the second heat exchanger main body are arranged in a vertical direction. 
     
     
         13 . An outdoor unit of an air-conditioning apparatus, comprising:
 a casing having an air inlet and an air outlet, and forming an outer shell;   a turbofan provided inside the casing, and configured to suck outside air from the air inlet and exhaust the outside air from the air outlet; and   a heat exchanger provided inside the casing, and configured to exchange heat between the outside air sucked by the turbofan and refrigerant,   the heat exchanger including
 a first heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of flat pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of flat pipes, and 
 a second heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of circular pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of circular pipes, 
   the first heat exchanger main body being arranged closer to a distal end of the turbofan than is the second heat exchanger main body.   
     
     
         14 . The outdoor unit of an air-conditioning apparatus of  claim 13 , wherein the first heat exchanger main body and the second heat exchanger main body are connected in series. 
     
     
         15 . The outdoor unit of an air-conditioning apparatus of  claim 13 , wherein the first heat exchanger main body and the second heat exchanger main body are connected in parallel. 
     
     
         16 . An indoor unit of an air-conditioning apparatus, comprising:
 a casing having an air inlet and an air outlet, and forming an outer shell;   a turbofan provided inside the casing, and configured to suck outside air from the air inlet and exhaust the outside air from the air outlet; and   a heat exchanger provided inside the casing, and configured to exchange heat between the outside air sucked by the turbofan and refrigerant,   the heat exchanger including
 a first heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of flat pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of flat pipes, and 
 a second heat exchanger main body including a plurality of fins arranged in parallel at an interval and a plurality of circular pipes passing through the plurality of fins in a direction of parallel arrangement of the plurality of fins, the refrigerant flowing inside the plurality of circular pipes, 
   the first heat exchanger main body being arranged closer to a distal end of the turbofan than is the second heat exchanger main body.   
     
     
         17 . The indoor unit of an air-conditioning apparatus of  claim 16 , wherein the first heat exchanger main body and the second heat exchanger main body are connected in series. 
     
     
         18 . The indoor unit of an air-conditioning apparatus of  claim 16 , wherein the first heat exchanger main body and the second heat exchanger main body are connected in parallel.