Air shutter and installation method thereof

Abstract

An insect/dust-proof air shutter which can positively prevent intrusion of foreign mater such as insects and dust and further trap intruded insects is provided. The air shutter 1 has side casings 2, 3 between which a passage space S is formed through which an inside space of a room is communicated to an outside space, the side casing 2 has an air suction openings 21 and an air discharge opening 22 proximate horizontally to one another and opening toward the passage space S, the side casing 3 has an air suction opening 31 and an air discharge opening 32 proximate horizontally to one another and opening toward the passage space S, the suction openings 21, 31 face the discharge openings 32, 31 respectively across the passage space S, air passages 23, 24 are formed in each of the side casings 2, 3 , air sucked through each of the suction openings 21, 31 is reversed in flow direction horizontally by 180° in each of the air passages 23, 24 to be blown out from each of the discharge openings 22, 32 , and air streams blown out from the discharge openings and sucked through the suction openings form circulating air streams flowing laterally across the passage space thereby forming double air films covering the passage space S.

1 . An air shutter for producing an air stream or streams flowing laterally across a passage space through which an inside space of a room is communicated to an outside space in order to intercept the inside space of the room from the outside space,
 wherein two air streams flowing in two planes in the passage space laterally crossing the passage space in opposite directions to one another are formed, and the air streams reverse their flow directions horizontally by 180° at each of both side end parts of the passage space so that the air streams circulate from one to the other air stream, thereby forming double air films crossing laterally in the passage space.   
   
   
       2 . An air shutter for producing an air stream or streams flowing laterally across a passage space through which an inside space of a room is communicated to an outside space in order to intercept the inside space of the room from the outside space,
 wherein a discharge opening and a suction opening are provided horizontally proximate to one another at each of side end wall parts forming the passage space such that the suction opening of one of the side end wall parts faces the discharge opening of the other side end wall part across the passage space, and   an air passage is provided in each of the side end wall parts such that air sucked in through each of the suction openings is reversed in its flow direction horizontally by 180° to be blown out from each of the discharge openings,   whereby the air streams circulate from one to the other air stream with each of the air streams flowing in opposite direction to one another, thereby forming double air films crossing laterally in the passage space.   
   
   
       3 . An air shutter according to  claim 2 , wherein an insect net is provided in said air passage. 
   
   
       4 . An air shutter for producing an air stream or streams flowing laterally across a passage space through which an inside space of a room is communicated to an outside space in order to intercept the inside space of the room from the outside space,
 wherein a discharge opening and a suction opening are provided vertically proximate to one another at each of side end wall parts forming the passage space such that the suction opening of one of the side end wall parts faces the discharge opening of the other side end wall part across the passage space,   and an air passage is provided in each of the side end wall parts such that air sucked in through each of the suction openings is reversed in its flow direction vertically by 180° to be blown out from each of the discharge openings,   whereby the air streams circulate from one to the other air stream with each of the air streams flowing in opposite direction to one another, and thus a single air film consisting of air two air streams flowing in opposite direction to one another is formed crossing laterally in the passage space, and   wherein an insect net is provided in said air passage.   
   
   
       5 . An air shutter according to  claim 1 , wherein a damper which is opened when the air shutter is operated and closed when the air shutter is not operated is provided at the suction opening. 
   
   
       6 . An air shutter according to  claim 3 , wherein said insect net contains an insecticide. 
   
   
       7 . An air shutter according to of  claim 1 , wherein an insect catching means is provided in said air passage. 
   
   
       8 . An air shutter according to  claims 7 , wherein said insect catching means is an insect catching sheet having adhesion property. 
   
   
       9 . An air shutter according to  claim 7 , wherein said insect catching means is an insect luring lamp that emits rays by which insects are attracted. 
   
   
       10 . An air shutter according to  claim 1 , wherein a circulating interruption air stream is consisted of a warm air infiltration interrupting air stream and a cold air exfiltration interrupting air stream formed respectively in a warm air infiltration zone in an upper region of the doorway opening and in a cold air exfiltration zone in a lower region of the doorway opening sandwiching an intermediate windless region such that the air streams circulate from one to the other air stream. 
   
   
       11 . An air shutter according to  claim 10 , wherein the circulating interruption air stream consists of a cold exfiltration air interrupting air stream of large in flow sectional area and low in flow velocity spouted toward the doorway opening from the cold exfiltration air interrupting air stream producing part of one of the gateposts where a suction duct and lower side fans are provided, and a warm exfiltration air interrupting air stream of small in flow sectional area and high in flow velocity spouted toward the doorway opening from the warm infiltration air interrupting air stream producing part of the other gatepost where a suction duct and upper side fans are provided, the gateposts being located facing each other across the doorway space. 
   
   
       12 . An air shutter according to  claim 2 , wherein a damper which is opened when the air shutter is operated and closed when the air shutter is not operated is provided at the suction opening. 
   
   
       13 . An air shutter according to  claim 4 , wherein said insect net contains an insecticide. 
   
   
       15 . An air shutter according to  claim 2 , wherein an insect catching means is provided in said air passage. 
   
   
       16 . An air shutter according to  claim 4 , wherein an insect catching means is provided in said air passage. 
   
   
       17 . An air shutter according to  claims 15 , wherein said insect catching means is an insect catching sheet having adhesion property. 
   
   
       18 . An air shutter according to  claims 16 , wherein said insect catching means is an insect catching sheet having adhesion property. 
   
   
       19 . An air shutter according to  claim 17 , wherein said insect catching means is an insect luring lamp that emits rays by which insects are attracted. 
   
   
       20 . An air shutter according to  claim 18 , wherein said insect catching means is an insect luring lamp that emits rays by which insects are attracted.