Outdoor unit of refrigeration cycle apparatus

Abstract

There is provided an outdoor unit of refrigeration cycle apparatus that can obtain a large airflow volume even when an external static pressure is high, while preventing an increase in size of the outdoor unit. For this object, the outdoor unit includes a housing in which a machine chamber and a blower chamber are formed, the blower chamber housing a heat exchanger and a blower inside. The blower is a double inlet centrifugal blower including: an impeller; and a scroll casing having suction ports and a discharge port, the scroll casing housing the impeller inside. A plurality of discharge ports are located on an outlet placement surface of the housing. A total width of the plurality of discharge ports in a direction horizontal with the housing placed and parallel to the outlet placement surface is more than a width of the blower chamber in said direction.

1 . An outdoor unit of refrigeration cycle apparatus comprising,
 a housing in which a machine chamber and a blower chamber are formed, the blower chamber being partitioned from the machine chamber, the machine chamber housing a compressor inside, the blower chamber housing a heat exchanger and a blower inside, the blower being located on a secondary side of the heat exchanger, wherein   the blower is a double inlet centrifugal blower including:   an impeller having a plurality of blades arranged in a circumferential direction around a rotation axis, and   a scroll casing having a discharge port and two bellmouths which serve as suction ports, the scroll casing housing the impeller inside,   a plurality of the discharge ports are provided,   the plurality of the discharge ports are located on an outlet placement surface, the outlet placement surface being a front or top surface of the housing,   a total width of the plurality of the discharge ports in a direction horizontal with the housing placed and parallel to the outlet placement surface is more than a width of the blower chamber in said direction,   the rotation axis of the impeller is positioned parallel to the outlet placement surface, and   the impeller has a fan diameter larger than a half of a width of the blower chamber in a direction perpendicular to the outlet placement surface.   
     
     
         2 . The outdoor unit of refrigeration cycle apparatus according to  claim 1 , wherein
 each of the plurality of blades of the impeller has a turbo blade portion constituting a backward curved blade formed at an outlet angle equal to or smaller than 90 degrees, and   when the blower is viewed from a direction parallel to the rotation axis, the turbo blade portion is exposed from the suction port.   
     
     
         3 . The outdoor unit of refrigeration cycle apparatus according to  claim 2 , wherein each of the plurality of blades of the impeller further has a sirocco blade portion provided on an outer circumferential side relative to the turbo blade portion in a radial direction from the rotation axis as a center, and constituting a forward curved blade formed at an outlet angle larger than 90 degrees. 
     
     
         4 . The outdoor unit of refrigeration cycle apparatus according to  claim 1 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is a front surface of the housing, and   the suction ports of the blower are located facing directions toward the top surface and a bottom surface of the housing.   
     
     
         5 . The outdoor unit of refrigeration cycle apparatus according to  claim 1 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is the front surface of the housing, and   the suction ports of the blower are located facing directions toward opposite left and right lateral surfaces of the housing.   
     
     
         6 . (canceled) 
     
     
         7 . (canceled) 
     
     
         8 . (canceled) 
     
     
         9 . The outdoor unit of refrigeration cycle apparatus according to  claim 1 , wherein a distance between the heat exchanger and a location in the scroll casing near a main plate portion of the impeller is shorter than a distance between the heat exchanger and a location in the scroll casing near a side plate portion of the impeller. 
     
     
         10 . The outdoor unit of refrigeration cycle apparatus according to  claim 9 , wherein the location in the scroll casing near the main plate portion of the impeller has a protruding portion protruding toward the heat exchanger, and a tip end of the protruding portion is formed into an arc shape. 
     
     
         11 . The outdoor unit of refrigeration cycle apparatus according to  claim 2 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is a front surface of the housing, and   the suction ports of the blower are located facing directions toward the top surface and a bottom surface of the housing.   
     
     
         12 . The outdoor unit of refrigeration cycle apparatus according to  claim 3 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is a front surface of the housing, and   the suction ports of the blower are located facing directions toward the top surface and a bottom surface of the housing.   
     
     
         13 . The outdoor unit of refrigeration cycle apparatus according to  claim 2 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is the front surface of the housing, and   the suction ports of the blower are located facing directions toward opposite left and right lateral surfaces of the housing.   
     
     
         14 . The outdoor unit of refrigeration cycle apparatus according to  claim 3 , wherein
 the blower has two or more of the discharge ports,   the outlet placement surface is the front surface of the housing, and   the suction ports of the blower are located facing directions toward opposite left and right lateral surfaces of the housing.   
     
     
         15 . The outdoor unit of refrigeration cycle apparatus according to  claim 2 , wherein a distance between the heat exchanger and a location in the scroll casing near a main plate portion of the impeller is shorter than a distance between the heat exchanger and a location in the scroll casing near a side plate portion of the impeller. 
     
     
         16 . The outdoor unit of refrigeration cycle apparatus according to  claim 3 , wherein a distance between the heat exchanger and a location in the scroll casing near a main plate portion of the impeller is shorter than a distance between the heat exchanger and a location in the scroll casing near a side plate portion of the impeller. 
     
     
         17 . The outdoor unit of refrigeration cycle apparatus according to  claim 4 , wherein a distance between the heat exchanger and a location in the scroll casing near a main plate portion of the impeller is shorter than a distance between the heat exchanger and a location in the scroll casing near a side plate portion of the impeller. 
     
     
         18 . The outdoor unit of refrigeration cycle apparatus according to  claim 5 , wherein a distance between the heat exchanger and a location in the scroll casing near a main plate portion of the impeller is shorter than a distance between the heat exchanger and a location in the scroll casing near a side plate portion of the impeller. 
     
     
         19 . The outdoor unit of refrigeration cycle apparatus according to  claim 15 , wherein the location in the scroll casing near the main plate portion of the impeller has a protruding portion protruding toward the heat exchanger, and a tip end of the protruding portion is formed into an arc shape. 
     
     
         20 . The outdoor unit of refrigeration cycle apparatus according to  claim 16 , wherein the location in the scroll casing near the main plate portion of the impeller has a protruding portion protruding toward the heat exchanger, and a tip end of the protruding portion is formed into an arc shape. 
     
     
         21 . The outdoor unit of refrigeration cycle apparatus according to  claim 17 , wherein the location in the scroll casing near the main plate portion of the impeller has a protruding portion protruding toward the heat exchanger, and a tip end of the protruding portion is formed into an arc shape. 
     
     
         22 . The outdoor unit of refrigeration cycle apparatus according to  claim 18 , wherein the location in the scroll casing near the main plate portion of the impeller has a protruding portion protruding toward the heat exchanger, and a tip end of the protruding portion is formed into an arc shape.