Ceiling Recessed Fan

Abstract

ceiling recessed fan includes a main body frame and an air outlet assembly.

1 . A ceiling recessed fan, comprising:
 a main body frame internally provided with an air outlet duct, wherein the air outlet duct comprises a first end and a second end along an airflow direction;   an air outlet assembly arranged in the main body frame, wherein when the ceiling recessed fan is in a cooling mode, there is a height difference between the air outlet assembly and the main body frame, and an air outlet is formed between the air outlet assembly and the main body frame, and the air outlet communicates with a second end of the air outlet duct;   a ratio of a height h1 of the air outlet to a width h2 of a first end of the air outlet duct is in a range of 1/3≤h1/h2≤3/5.   
     
     
         2 . The ceiling recessed fan according to  claim 1 , wherein the air outlet assembly is arranged in the main body frame in a way so as to be able to be raised and lowered, and the air outlet assembly has an operation position descending to a set height to form the height difference, and when the air outlet assembly is in the operation position, the ratio of the height h1 of the air outlet to the width h2 of the first end of the air outlet duct is in a range of 1/3≤h1/h2≤3/5. 
     
     
         3 . The ceiling recessed fan according to  claim 1 or 2 , wherein the air outlet assembly comprises an air deflector and an air outlet frame, the air outlet frame is arranged in the main body frame; the air deflector is rotatably arranged on the air outlet frame; and when the air outlet assembly is in an operation position, the air deflector is capable of adjusting a height of the air outlet. 
     
     
         4 . The ceiling recessed fan according to  claim 3 , wherein the air deflector has a first position to allow the height h1 of the air outlet to reach a minimum value, and the ratio of a minimum height h1 of the air outlet to the width of a first end of the air outlet duct is in the range of 1/3≤h1/h2≤3/5. 
     
     
         5 . The ceiling recessed fan according to  claim 3 , wherein when the ceiling recessed fan is in a cooling mode, the included angle a between the plane where the air deflector is located and the horizontal plane is in the angle range of −10°≤a≤10°, and when a=0°, the plane where the air deflector is located is parallel to the horizontal plane. 
     
     
         6 . The ceiling recessed fan according to  claim 5 , wherein when the ceiling recessed fan is in the cooling mode, the included angle a in the angle range of 10°>a>0°, and when a>0°, the air deflector tilts upwards relative to the horizontal plane. 
     
     
         7 . The ceiling recessed fan according to  , wherein the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame. 
     
     
         8 . The ceiling recessed fan according to  claim 7 , wherein when the air outlet assembly is in the closed position, the air outlet frame and the air deflector jointly cooperate with the main body frame to form a seal. 
     
     
         9 . The ceiling recessed fan according to  , wherein the air outlet assembly comprises an air outlet frame, the air outlet is formed between the air outlet frame and the main body frame, and the air outlet frame is lifted independently. 
     
     
         10 . The ceiling recessed fan according to  , wherein the air outlet assembly comprises an air outlet frame and an air return panel, the air outlet is formed between the air outlet frame and the main body frame, the air return panel is provided with an air return gate, and the air outlet frame and the air return panel are connected and lifted together. 
     
     
         11 . A ceiling recessed fan, comprising:
 a main body frame internally provided with an air outlet duct, wherein the air outlet duct has a first end and a second end along an airflow direction;   an air outlet assembly arranged in the main body frame in a way so as to be able to be raised and lowered, and having an operation position which descends to a predetermined height and forms an air outlet with the main body frame, wherein the air outlet communicates with a second end of the air outlet duct;   when the air outlet assembly is in the operation position, the angle b between the air output direction of the air outlet and the air output direction of the air outlet duct is in the angle value of 130°≤b≤150°.   
     
     
         12 . The ceiling recessed fan according to  claim 11 , wherein the air outlet assembly comprises an air deflector and an air outlet frame, the air outlet frame is arranged in the main body frame; the air deflector is swingably arranged on the air outlet frame; and when the air outlet assembly is in the operation position, the air deflector is capable of adjusting a height of the air outlet. 
     
     
         13 . The ceiling recessed fan according to  claim 12 , wherein the ceiling recessed fan has a cooling mode, and when the ceiling recessed fan is in the cooling mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 120°≤c≤140°. 
     
     
         14 . The ceiling recessed fan according to  claim 12 , wherein the ceiling recessed fan has a heating mode, and when the ceiling recessed fan is in the heating mode, the angle c between the plane where the air deflector is located and the air output direction of the air outlet duct is in the angle range of 180°≤c≤190°. 
     
     
         15 . The ceiling recessed fan according to  , wherein the air outlet assembly has a closed position to close the air outlet in cooperation with the main body frame, and the air deflector has a first edge and a second edge; and when the air outlet assembly is in the closed position, the first edge is sealed with a corresponding position of the main body frame, and the second edge is sealed with a corresponding edge of the air outlet frame. 
     
     
         16 . The ceiling recessed fan according to  claim 15 , wherein the second edge is provided with a first step structure, and the air outlet frame is provided with a second step structure fit with the step structure, so that the first step structure can be sealingly fit with the second step structure. 
     
     
         17 . The ceiling recessed fan according to  claim 16 , wherein the first step structure is provided with a seal, and when the first step structure is sealingly fit with the second step structure, the seal is located between the first step structure and the second step structure. 
     
     
         18 . The ceiling recessed fan according to  , wherein the ceiling recessed fan also comprises a swinging mechanism arranged on the air outlet assembly, and the air deflector is arranged on the swinging mechanism. 
     
     
         19 . The ceiling recessed fan according to  claim 18 , wherein the swinging mechanism comprises a rotary arm, one end of which is hinged to the air outlet frame, and the other end of which is arranged on the air deflector. 
     
     
         20 . The ceiling recessed fan according to  claim 19 , wherein the swinging mechanism also comprises a driving member arranged on the air outlet frame and directly or indirectly driving the rotary arm to rotate. 
     
     
         21 - 134 . (canceled)