Air conditioner and cross-flow fan thereof

Abstract

A cross-flow fan includes a volute internally provided with an air supply duct, a cross-flow fan wheel disposed in the air supply duct and dividing the air supply duct into an air inlet duct located upstream of the cross-flow fan wheel and an air outlet duct located downstream of the cross-flow fan wheel, and a flow guide member disposed at a side wall of the air outlet duct close to an end of the cross-flow fan wheel.

1 .- 18 . (canceled) 
     
     
         19 . A cross-flow fan comprising:
 a volute internally provided with an air supply duct;   a cross-flow fan wheel disposed in the air supply duct and dividing the air supply duct into an air inlet duct located upstream of the cross-flow fan wheel and an air outlet duct located downstream of the cross-flow fan wheel; and   a flow guide member disposed at a side wall of the air outlet duct close to an end of the cross-flow fan wheel.   
     
     
         20 . The cross-flow fan according to  claim 19 , wherein:
 the volute includes an air outlet disposed at an end of the air outlet duct facing away from the cross-flow fan wheel;   a height of the flow guide member gradually increases along the air outlet duct in a direction from the air outlet to the cross-flow fan wheel or a direction from the cross-flow fan wheel to the air outlet.   
     
     
         21 . The cross-flow fan according to  claim 20 , wherein:
 a necking is disposed at the air outlet duct; and   the flow guide member is configured as a boss and the height of the flow guide member at the necking is 3-6 mm.   
     
     
         22 . The cross-flow fan according to  claim 19 , wherein:
 the volute includes a surrounding plate, two side plates covering two sides of the surrounding plate, respectively, and a volute tongue disposed between the two side plates, two sides of the volute tongue being connected with the two side plates, respectively;   the two side plates, the surrounding plate and the volute tongue enclose to form the air supply duct;   an axial direction of the cross-flow fan wheel is perpendicular to the side plates; and   the flow guide member is disposed at an inward-facing surface of one side plate of the two side plates and is located at an end of the air outlet duct close to the cross-flow fan wheel.   
     
     
         23 . The cross-flow fan according to  claim 22 , wherein:
 the flow guide member is configured as a boss, a necking is disposed at the air outlet duct, and a distance between the surrounding plate and the volute tongue is minimal at the necking; and   the flow guide member covers at least a region of the one side plate between the necking and the cross-flow fan wheel in the air outlet duct.   
     
     
         24 . The cross-flow fan according to  claim 23 , wherein the flow guide member covers all regions of the one side plate in the air outlet duct. 
     
     
         25 . The cross-flow fan according to  claim 24 , wherein the flow guide member is a platform and a height of the flow guide member is 3-6 mm. 
     
     
         26 . The cross-flow fan according to  claim 22 , wherein:
 each of the side plates is provided with a plurality of flow guide members each configured as a flow guide vane protruding from a corresponding one of the side plates;   a cross section of each of the flow guide members includes a windward front end and a leeward tail end, and an included angle between an extending direction of the cross section at a tip of the tail end and a flow direction of an airflow at a position where the tip is located is an obtuse angle or a flat angle;   the plurality of flow guide members are arranged sequentially at intervals in a direction from the volute tongue to the surrounding plate.   
     
     
         27 . The cross-flow fan according to  claim 26 , wherein the included angle is in a range of 135°-180°. 
     
     
         28 . The cross-flow fan according to  claim 26 , wherein a height of the flow guide member is in a range of 3-6 mm. 
     
     
         29 . The cross-flow fan according to  claim 26 , wherein projections of the plurality of flow guide members in a direction perpendicular to an air outlet direction of the cross-flow fan and an axial direction of the cross-flow fan wheel are connected end-to-end in sequence. 
     
     
         30 . The cross-flow fan according to  claim 26 , wherein:
 a necking is disposed at the air outlet duct, and a distance between the surrounding plate and the volute tongue is minimal at the necking; and   the flow guide members are distributed in regions of the side plates between the necking and the cross-flow fan wheel in the air outlet duct.   
     
     
         31 . The cross-flow fan according to  claim 22 , wherein the flow guide member is configured as a rib extending from the surrounding plate to the volute tongue. 
     
     
         32 . The cross-flow fan according to  claim 31 , wherein:
 a necking is disposed at the air outlet duct, and a distance between the surrounding plate and the volute tongue is minimal at the necking; and   the flow guide member is disposed at the necking.   
     
     
         33 . The cross-flow fan according to  claim 22 , wherein the flow guide member is one of a plurality of flow guide members of the cross-flow fan each configured as a column projecting from the side plate. 
     
     
         34 . The cross-flow fan according to  claim 33 , wherein:
 a necking is disposed at the air outlet duct, and a distance between the surrounding plate and the volute tongue is minimal at the necking; and   the plurality of flow guide members are distributed in a region of the side plate between the necking and the cross-flow fan wheel in the air outlet duct.   
     
     
         35 . The cross-flow fan according to  claim 34 , wherein:
 the plurality of flow guide members are arranged in a plurality of rows, and the plurality of flow guide members in each row of flow guide members are arranged in a direction perpendicular to an airflow direction;   the plurality of rows of flow guide members are arranged sequentially along the airflow direction, and, along the airflow direction, heights of the flow guide members in a single row of flow guide members increase and a number of flow guide members in a single row of flow guide members increases.   
     
     
         36 . An air conditioner comprising:
 a cross-flow fan including:
 a volute internally provided with an air supply duct; 
 a cross-flow fan wheel disposed in the air supply duct and dividing the air supply duct into an air inlet duct located upstream of the cross-flow fan wheel and an air outlet duct located downstream of the cross-flow fan wheel; and 
 a flow guide member disposed at a side wall of the air outlet duct close to an end of the cross-flow fan wheel. 
   
     
     
         37 . The air conditioner according to  claim 36 , wherein:
 the volute includes an air outlet disposed at an end of the air outlet duct facing away from the cross-flow fan wheel;   a height of the flow guide member gradually increases along the air outlet duct in a direction from the air outlet to the cross-flow fan wheel or a direction from the cross-flow fan wheel to the air outlet.   
     
     
         38 . The air conditioner according to  claim 27 , wherein:
 a necking is disposed at the air outlet duct; and   the flow guide member is configured as a boss and the height of the flow guide member at the necking is 3-6 mm.