Booth and ejecting device

Abstract

A booth including an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space. The ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.

What is claimed is: 
     
         1 . A booth comprising:
 an ejecting unit that ejects air into an opening portion leading to an internal space partitioned from an external space,   wherein the ejecting unit forms a first airflow that suppresses introduction of a disturbance from the external space into the internal space and a second airflow that suppresses introduction of the first airflow into the internal space inside the first airflow.   
     
     
         2 . The booth according to  claim 1 , wherein the ejecting unit ejects the air such that the second airflow is weaker than the first airflow. 
     
     
         3 . A booth comprising:
 an ejecting unit that is provided in an opening portion leading to an internal space partitioned from an external space to eject air toward the opening portion,   wherein the ejecting unit ejects the air so as to form a first airflow and a second airflow that is formed inside the first airflow and weaker than the first airflow.   
     
     
         4 . The booth according to  claim 1 , wherein the ejecting unit includes a first ejection port for forming the first airflow and a second ejection port for forming the second airflow. 
     
     
         5 . The booth according to  claim 4 ,
 wherein the first ejection port and the second ejection port are parallel to each other, and the first ejection port is provided on a side farther from the internal space than the second ejection port.   
     
     
         6 . The booth according to  claim 5 ,
 wherein the first ejection port blows out the first airflow in a horizontal direction parallel to a plane formed by the opening portion, and   the second ejection port blows out the second airflow in the horizontal direction parallel to the plane formed by the opening portion.   
     
     
         7 . The booth according to  claim 6 , wherein the first airflow and the second airflow are layered airflows that cover the opening portion. 
     
     
         8 . The booth according to  claim 1 , wherein directions of the first airflow and the second airflow are a horizontal direction. 
     
     
         9 . The booth according to  claim 1 , wherein directions of the first airflow and the second airflow are downward in a vertical direction. 
     
     
         10 . The booth according to  claim 1 , further comprising:
 a suction unit that is provided to face the ejecting unit and suctions the air.   
     
     
         11 . The booth according to  claim 10 , wherein the suction unit includes at least one vertically elongated suction port for suctioning the first airflow and the second airflow. 
     
     
         12 . The booth according to  claim 1 , wherein two ejecting units are provided,
 the two ejecting units are disposed on both sides of the opening portion, and   directions of the first airflow and the second airflow formed by the two ejecting units are a direction of the opening portion and a direction toward an external space side.   
     
     
         13 . The booth according to  claim 1 , further comprising:
 an upper cover that covers an upper part of the opening portion.   
     
     
         14 . The booth according to  claim 1 , wherein wind speeds of the first airflow and the second airflow formed by the ejecting unit are different from each other in a height direction. 
     
     
         15 . The booth according to  claim 1 , further comprising:
 an air conditioning unit that performs air-conditioning control of the internal space,   wherein the first airflow and the second airflow are formed by the air supplied by the air conditioning unit.   
     
     
         16 . The booth according to  claim 15 , further comprising:
 an introduction port for introducing the air supplied by the air conditioning unit into the internal space,   wherein the introduction port releases a uniformized airflow of which a blowing direction is controlled downward to the internal space.   
     
     
         17 . The booth according to  claim 16 , further comprising:
 a lead-out port for leading out the air supplied into the internal space, from the internal space,   wherein the air supplied into the internal space is recovered to the air conditioning unit through a pipe to the lead-out port.   
     
     
         18 . The booth according to  claim 1 , wherein a partition member is provided between the external space and the internal space except for the opening portion. 
     
     
         19 . An ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space, wherein the ejecting device forms
 a first airflow that suppresses introduction of a disturbance from the external space into the internal space, and   a second airflow that suppresses introduction of the first airflow into the internal space and is formed inside the first airflow.   
     
     
         20 . An ejecting device that ejects air into an opening portion leading to an internal space partitioned from an external space, wherein the ejecting device ejects the air so as to form
 a first airflow, and   a second airflow that is formed inside the first airflow and weaker than the first airflow.