Air supply structure and displacement air conditioning system

Abstract

An air supply structure is provided above a room that is a target of a displacement air conditioning system and in which a thermal stratification or a pollutant concentration stratification is formed. The air supply structure introduces air into the room. The air supply structure includes an air passage that opens toward a lower portion of a target space, and blows out air. The air passage includes an inner portion on a center side from which air is blown out at a first average wind speed, and an outer portion from which air is blown out at a second average wind speed lower than the first average wind speed. The outer portion is provided on an outer side of the inner portion.

1 . An air supply structure provided above a room that is a target of a displacement air conditioning system and in which a thermal stratification or a pollutant concentration stratification is formed, the air supply structure introducing air into the room, the air supply structure comprising
 an air passage that opens toward a lower portion of a target space, and blows out air, the air passage including
 an inner portion on a center side from which air is blown out at a first average wind speed, and 
 an outer portion from which air is blown out at a second average wind speed lower than the first average wind speed, the outer portion being provided on an outer side of the inner portion. 
   
     
     
         2 . The air supply structure according to  claim 1 , wherein
 the inner portion is defined by an inner air passage pipe on a center side of the air passage pipe portion, and the outer portion is defined by the inner air passage pipe and an outer air passage pipe adjacent to the inner air passage pipe.   
     
     
         3 . The air supply structure according to  claim 2 , wherein
 the inner air passage pipe has a smaller dimension than the outer air passage pipe in a blowing direction, or the inner air passage pipe has a larger dimension than the outer air passage pipe in a direction intersecting the blowing direction.   
     
     
         4 . The air supply structure according to  claim 2 , wherein
 a distance between the outer air passage pipe and the inner air passage pipe is smaller than a diameter of the inner air passage pipe.   
     
     
         5 . The air supply structure according to  claim 1 , further comprising:
 a housing including
 a through hole configured to introduce air; and 
 a guide arranged to guide the air flowing in through the through hole to the air passage pipe portion. 
   
     
     
         6 . The air supply structure according to  claim 5 , wherein
 the guide includes at least one curved plate.   
     
     
         7 . The air supply structure according to  claim 5 , wherein
 the through hole is disposed in a side portion of the housing,   the air passage is disposed in a lower portion of the housing, and   the guide is disposed
 at a vertical and horizontal position corresponding to the through hole and 
 at a horizontal position corresponding to the air passage. 
   
     
     
         8 . The air supply structure according to  claim 5 , wherein
 the guide is disposed at a position overlapping an axis of the air passage.   
     
     
         9 . A displacement air conditioning system including the air supply structure according to  claim 1 . 
     
     
         10 . The air supply structure according to  claim 2 , further comprising:
 a housing including
 a through hole configured to introduce air; and 
 a guide arranged to guide the air flowing in through the through hole to the air passage pipe portion. 
   
     
     
         11 . The air supply structure according to  claim 3 , further comprising:
 a housing including
 a through hole configured to introduce air; and 
 a guide arranged to guide the air flowing in through the through hole to the air passage pipe portion. 
   
     
     
         12 . The air supply structure according to  claim 4 , further comprising:
 a housing including
 a through hole configured to introduce air; and 
 a guide arranged to guide the air flowing in through the through hole to the air passage pipe portion. 
   
     
     
         13 . The air supply structure according to  claim 6 , wherein
 the through hole is disposed in a side portion of the housing,   the air passage is disposed in a lower portion of the housing, and   the guide is disposed
 at a vertical and horizontal position corresponding to the through hole and 
 at a horizontal position corresponding to the air passage. 
   
     
     
         14 . The air supply structure according to  claim 6 , wherein
 the guide is disposed at a position overlapping an axis of the air passage.   
     
     
         15 . The air supply structure according to  claim 7 , wherein
 the guide is disposed at a position overlapping an axis of the air passage.   
     
     
         16 . A displacement air conditioning system including the air supply structure according to  claim 2 .