Ceiling air conditioner

Abstract

A ceiling air conditioner includes a cross-flow fan, a case defining an internal space in which the cross-flow fan is mounted, a front panel coupled to the case and having a suction part and a discharge part, a heat exchanger configured to exchange heat with air suctioned into the case and to partition the internal space into a suction flow path and a discharge flow path, a rear guide installed between the discharge part and the heat exchanger and configured to guide air which has passed through the heat exchanger to the discharge part, and protrusions including at least one protrusion surface and formed on both side surfaces or one side surface defining the discharge part or the discharge flow path to change a length of the discharge flow path in a first direction based on a air discharge direction.

What is claimed is: 
     
         1 . A ceiling air conditioner comprising:
 a cross-flow fan extending in a first direction;   a case defining an internal space in which the cross-flow fan is mounted;   a front panel coupled to the case and having a suction part through which indoor air is suctioned and a discharge part through which air is discharged toward a room;   a heat exchanger configured to exchange heat with air suctioned into the case and to partition the internal space into a suction flow path and a discharge flow path;   a rear guide installed between the discharge part and the heat exchanger and configured to guide air which has passed through the heat exchanger to the discharge part; and   protrusions including at least one protrusion surface and disposed at both side surfaces or one side surface defining the discharge part or the discharge flow path, the protrusions being configured to change a length of the discharge flow path in the first direction based on an air discharge direction.   
     
     
         2 . The ceiling air conditioner of  claim 1 , wherein the protrusions are configured to reduce a length of the discharge flow path in the first direction based on the air discharge direction. 
     
     
         3 . The ceiling air conditioner of  claim 2 , wherein the protrusions are configured to reduce the length of the discharge flow path in the first direction stepwise based on the air discharge direction. 
     
     
         4 . The ceiling air conditioner of  claim 3 , wherein the protrusions comprise at least two surfaces stepped in the first direction. 
     
     
         5 . The ceiling air conditioner of  claim 4 , wherein the protrusions comprise a first protrusion surface and a second protrusion surface protruding a predetermined height further in the first direction than the first protrusion surface. 
     
     
         6 . The ceiling air conditioner of  claim 5 , wherein the first protrusion surface and the second protrusion surface are formed in parallel. 
     
     
         7 . The ceiling air conditioner of  claim 4 , wherein at least portions of the first protrusion surface and the second protrusion surface are formed to be inclined. 
     
     
         8 . The ceiling air conditioner of  claim 5 , wherein the protrusions are formed on both side surfaces defining the discharge part or the discharge flow path to face each other, and
 wherein a gap between the first protrusion surfaces is greater than a gap between the second protrusion surfaces.   
     
     
         9 . The ceiling air conditioner of  claim 1 , wherein the protrusions are provided as a separate member and are attached to both side surfaces or one side surface defining the discharge part or the discharge flow path. 
     
     
         10 . The ceiling air conditioner of  claim 1 , wherein the protrusions are integrally formed on both side surfaces or one side surface defining the discharge part or the discharge flow path. 
     
     
         11 . The ceiling air conditioner of  claim 1 , wherein the rear guide comprises:
 a first guide part guiding air which has passed through the heat exchanger to a suction side of the cross-flow fan; and   a second guide part extending roundly from the first guide part to guide air discharged from the cross-flow fan to the discharge part.   
     
     
         12 . The ceiling air conditioner of  claim 11 , wherein the second guide part is formed with a guide protrusion protruding toward the cross-flow fan and extending long in a longitudinal direction of the cross-flow fan. 
     
     
         13 . The ceiling air conditioner of  claim 11 , wherein a guide jaw protruding toward the suction side of the cross-flow fan is provided between the first guide part and the second guide part. 
     
     
         14 . The ceiling air conditioner of  claim 1 , further comprising:
 a filter disposed on a suction side of the heat exchanger;   a filter mounting part where the filter is mounted; and   a control box disposed in the suction flow path and having a built-in printed circuit board (PCB).