초록 ▼

A ventilation system for an air conditioning system includes dampers, a heat exchange unit, and a control unit. One damper controls the flow of ambient air into the system. The other damper controls the flow of relief/exhaust air that is utilized to scavenge energy from return air from a room or spa

A ventilation system for an air conditioning system includes dampers, a heat exchange unit, and a control unit. One damper controls the flow of ambient air into the system. The other damper controls the flow of relief/exhaust air that is utilized to scavenge energy from return air from a room or space being cooled (or heated) by the air conditioning system. The ventilation system utilizes a control algorithm in the control unit to calculate, at stepped spaced apart increasing room ventilation rates, increasing CO2 concentrations in the air in the room that are below a maximum desired CO2 concentration in a room. The control algorithm permits a control unit in the ventilation system to open and close the dampers to maintain a CO2 concentration in the room that is below the desired CO2 concentration level.

대표청구항 ▼

1. An air circulation system comprising (a) a building structure;(b) an inlet air duct extending at least partially in said building structure;(c) an air outlet duct extending at least partially in said building structure;(d) a damper assembly interconnecting said air inlet duct and said air outlet

1. An air circulation system comprising (a) a building structure;(b) an inlet air duct extending at least partially in said building structure;(c) an air outlet duct extending at least partially in said building structure;(d) a damper assembly interconnecting said air inlet duct and said air outlet duct and including, (i) a cylindrically shaped damper housing wall enclosing an inner space and having a top and a bottom,(ii) a first damper blade pivotally mounted inside said damper housing wall in said inner space and including a first blade edge adjacent and conforming to said damper housing wall,(iii) a second damper blade pivotally mounted inside said damper housing wall in said inner space and including a second blade edge adjacent and conforming to said damper housing wall,(iv) at least one air inlet opening formed in said damper assembly to receive air from said inlet air duct and to direct air into said inner space,(v) a first air outlet opening formed in said damper assembly to direct air into said air outlet said damper assembly including a scalloped edge,(vi) a second air outlet opening formed in said damper assembly to direct air into said air outlet duct;at least one of said damper housing wall, andsaid damper bladesbeing rotatable between at least two operative positions;(e) a closed operative position in which said damper blades are in a closed position to prevent air from moving through said air outlet openings;(f) an open operative position wherein (i) said first damper blade has pivoted from said first closed operative position to said second open operative position to permit air from said inner space to flow through at least a part of said first air outlet opening, said part of said first air outlet opening having a cross sectional area, a total perimeter and an actual opening perimeter,(ii) said second damper blade has pivoted simultaneously with said first damper blade from said first closed operative position to said second open operative position to prevent air from flowing from said inner space into said second outlet opening,(iii) a portion of said first blade edge and a section of said scalloped edge collectively circumscribe said part of said first air outlet opening, said portion of said first blade edge extending across said first air outlet opening and having a first length, said section of said scalloped edge having a second length,(iv) said second length of said section of said scalloped edge comprises said actual opening perimeter,(v) said first length of said portion of said first blade edge and said second length of said section of said scalloped edge comprise said total perimeter of said part of said first air outlet opening,(vi) a first rectangular portion of said damper housing wall is exposed which, extends from said top to said bottom of said damper housing wall,includes said part of said first outlet opening,has an area collectively circumscribed by said first edge of said first damper blade, by a line tangent to said part of said first outlet opening and spaced apart from said first edge of said first damper blade, and by portions of said top and bottom of said damper housing wall,said first rectangular portion being exposed to air flowing through said damper assembly,(vii) a ratio of said area of said first portion of said damper housing wall to said total perimeter of said part of said first outlet opening is in the range of 1.0:0.6 to 1.0:1.4,(viii) a ratio of said cross sectional area of part of said first outlet opening to said outlet opening perimeter is in the range of 1.0:0.8 to 1.0:1.4,(ix) a ratio of said area of said first rectangular portion to said outlet opening perimeter is in the range of 1.0:0.5 to 1.0:1.1; and,(g) a fan directing air into said air inlet duct, through said air inlet opening, and into said inner space circumscribed by said damper housing wall. 2. The system of claim 1 wherein in said open operative position, said damper assembly is 50% open. 3. The system of claim 1 wherein in said open operative position, said damper assembly is 60% open. 4. The system of claim 1 wherein in said open operative position, said damper assembly is 70% open. 5. The system of claim 1 wherein in said open operative position, said damper assembly is 80% open. 6. The system of claim 1 where an amount by which said damper assembly is open is selected from a group consisting of 50% open, 60% open, 70% open, 80% open, and 90% open. 7. The system of claim 1 wherein when said damper assembly is moved from said open operative position to 40% open to 50% open to 60% open to 70% open to 80% open to 90% open, the rate of air flow increases substantially linearly such that a straight line representing air flow at each of said open operative positions can be drawn which varies from each of the air flow rates by no more than 20%. 8. The system of claim 7 wherein said straight line varies from each of the air flow rates by no more than 15%. 9. The system of claim 8 wherein said straight line varies from each of the air flow rates by no more than 10%. 10. An air circulation system comprising (a) a cylindrically shaped damper housing wall circumscribing an inner space and having a top and a bottom;(b) a first damper blade pivotally mounted inside said damper housing wall in said inner space and including a first blade edge adjacent and conforming to said damper housing wall;(c) a second damper blade pivotally mounted inside said damper housing wall in said inner space and including a second blade edge adjacent and conforming to said damper housing wall;(d) at least one air inlet opening formed in said damper housing wall;(e) at least one air outlet opening formed in said damper housing wall, said damper assembly including a scalloped edge,at least one of said damper housing wall and said damper blades being rotatable between at least two operative positions,(f) a closed operative position in which at least one of said damper blades and said damper housing wall is in a closed position to prevent air flowing into said inner space from said air inlet opening from moving through said air outlet opening,(g) an open operative position in which (i) said first damper blade has pivoted from said first closed operative position to said second open operative position to permit air from said inner space to flow through at least a part of said first air outlet opening, said part of said first air outlet opening having a cross sectional area, a total perimeter and an actual opening perimeter,(ii) said second damper blade has pivoted simultaneously with said first damper blade from said first closed operative position to said second open operative position,(iii) a portion of said first blade edge and a section of said scalloped edge collectively circumscribe said part of said air outlet opening, said portion of said first blade edge extending across said first air outlet opening and having a first length, said section of said scalloped edge having a second length,(iv) said second length of said section of said scalloped edge comprises said actual opening perimeter,(v) said first length of said portion of said first blade edge and said second length of said section of said scalloped edge comprise said total perimeter of said part of said air outlet opening,(vii) a first rectangular portion of said damper housing wall is exposed which, extends from said top to said bottom of said damper housing wall,includes said part of said air outlet opening,has an area collectively circumscribed by said first edge of said first damper blade, by a line tangent to said part of said air outlet opening and spaced apart from said first edge of said first damper blade, and by portions of said top and bottom of said damper housing wall,said first rectangular portion being exposed to air flowing through said damper assembly,(viii) a ratio of said area of said first portion of said damper housing wall to said total perimeter of said part of said air outlet opening is in the range of 1.0:0.6 to 1.0:1.4,(viii) a ratio of said cross sectional area of said part of said air outlet opening to said outlet opening perimeter is in the range of 1.0:0.8 to 1.0:1.4,(ix) a ratio of said area of said first rectangular portion to said outlet opening perimeter is in the range of 1.0:0.5 to 1.0:1.1; and,(h) a fan directing air into said air inlet duct, through said air inlet opening, and into said inner space circumscribed by said damper housing wall. 11. The air circulation system of claim 1 wherein said form of said first portion of said damper housing wall is rectangular. 12. The air circulation system of claim 10 wherein said area of said first portion of said damper housing wall is rectangular.