Abstract: A centrifugal fan mounted in an air conditioner has the following relationship: outer diameter of a side plate of the centrifugal fan>outer diameter of the blade rear-edge part on side-plate side>diameter of the blade rear-edge part on main plate side>outer diameter of the main plate. In the centrifugal fan, the blade rear-edge part is positioned inside from a straight line connecting the connection point between the blade rear-edge part and the main plate, to the connection point between the blade rear-edge part and the side plate, as viewed from the rotation axis. The blade rear-edge part has a shape such that the distance from the rotation axis becomes larger from the main plate toward the side plate.

Abstract: A centrifugal fan mounted in an air conditioner has the following relationship: outer diameter of a side plate of the centrifugal fan>outer diameter of the blade rear-edge part on side-plate side>diameter of the blade rear-edge part on main plate side>outer diameter of the main plate. In the centrifugal fan, the blade rear-edge part is positioned inside from a straight line connecting the connection point between the blade rear-edge part and the main plate, to the connection point between the blade rear-edge part and the side plate, as viewed from the rotation axis. The blade rear-edge part has a shape such that the distance from the rotation axis becomes larger from the main plate toward the side plate.

Abstract: A centrifugal fan mounted in an air conditioner has the following relationship: outer diameter of a side plate of the centrifugal fan > outer diameter of the blade rear-edge part on side-plate side > diameter of the blade rear-edge part on main plate side ? outer diameter of the main plate. In the centrifugal fan, the blade rear-edge part is positioned inside from a straight line connecting the connection point between the blade rear-edge part and the main plate, to the connection point between the blade rear-edge part and the side plate, as viewed from the rotation axis. The blade rear-edge part has a shape such that the distance from the rotation axis becomes larger from the main plate toward the side plate.

Abstract: To obtain an air conditioner having a lower-noise centrifugal fan capable of improving product reliability during transportation and execution properties of installation, with reduced packaging materials in favor of environment. The shape of a blade is formed so that when a blade edge positioned on the downstream side of the blowing direction is designated as a blade rear-edge, the centrifugal fan has a relationship of the outer diameter of the side plate>the outer diameter of the blade rear-edge on the side of a side plate>the outer diameter of the blade rear-edge on the side of a main plate?the outer diameter of the main plate, and the blade rear-edge is located inside of a straight line connecting a connection point between the blade rear-edge and the main plate to a connection point between the blade rear-edge and the side plate relative to the rotation axis of the fan, and the distance between the blade rear edge and the rotation axis increases toward the side plate from the main plate.

Abstract: To obtain an air conditioner having a lower-noise centrifugal fan capable of improving product reliability during transportation and execution properties of installation, with reduced packaging materials in favor of environment. The shape of a blade is formed so that when a blade edge positioned on the downstream side of the blowing direction is designated as a blade rear-edge, the centrifugal fan has a relationship of the outer diameter of the side plate>the outer diameter of the blade rear-edge on the side of a side plate>the outer diameter of the blade rear-edge on the side of a main plate?the outer diameter of the main plate, and the blade rear-edge is located inside of a straight line connecting a connection point between the blade rear-edge and the main plate to a connection point between the blade rear-edge and the side plate relative to the rotation axis of the fan, and the distance between the blade rear edge and the rotation axis increases toward the side plate from the main plate.