AIR TERMINAL DEVICE FOR CONTROL OF AIR FLOW IN A VENTILATION SYSTEM

• US 20190309962A1
• Filed: 04/09/2019
• Published: 10/10/2019
• Est. Priority Date: 04/09/2018
• Status: Active Grant

• Current Assignee: Swegon Operations AB (Investment AB Latour)
• Original Assignee: Swegon Operations AB (Investment AB Latour)
• Inventors: LARSSON, Per Ake
• Granted Patent: US 11,530,837 B2
• Time in Patent Office: Days
• CPC Class Codes: F24F 1/0011 characterised by air outlets
• CPC Class Codes: F24F 1/0014 having two or more outlet openings
• CPC Class Codes: F24F 1/0035 characterised by introduction of outside air to the room
• CPC Class Codes: F24F 1/0063 by the mounting or arrangement of the heat exchangers
• CPC Class Codes: F24F 1/01 in which secondary air is induced by injector action of the primary air
• CPC Class Codes: F24F 11/72 for controlling the supply of treated air, e.g. its pressure
• CPC Class Codes: F24F 13/0236 with ducts including air distributors, e.g. air collecting boxes with at least three openings
• CPC Class Codes: F24F 13/06 Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
• CPC Class Codes: F24F 13/10 movable, e.g. dampers
• CPC Class Codes: F24F 13/12 built up of sliding members
• CPC Class Codes: F24F 13/26 Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
• CPC Class Codes: F24F 2013/0616 Outlets that have intake openings

Abstract

Disclosed is an air terminal device for a ventilation system for a building. The air terminal device includes a pressure box, with an inlet admitting supply air into the pressure box and outlet openings for admitting supply air out. The device further includes first and second cover plates, each arranged to control and change the open area of a plurality of the outlet openings. The outlet openings are arranged in a wall of the pressure box forming an outlet surface of the pressure box. The cover plate or cover plates are arranged to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings. The first cover plate and the second cover plate are arranged to slide relative each other and to be in contact with and slide relative the outlet surface while changing the open area of the outlet openings.

Claims

1. An air terminal device (1) for a ventilation system, e.g. a Heating and Ventilation Air Conditioning (HVAC) system, for a building, said air terminal device (1) comprising. a pressure box (2), provided with at least one inlet (3) for admitting supply air into the pressure box and a plurality of outlet openings (4) for admitting supply air out of the pressure box (2), said air terminal device (1) further comprises a first cover plate (6a) and a second cover plate (6b) whereof each cover plate (6a, 6b) is arranged to control and change the open area of a plurality of said outlet openings (4), said plurality of outlet openings (4) are arranged on an outlet surface (5) of the pressure box, wherein first cover plate (6a) and the second cover plate (6b) are arranged to slide relative each other and to be in contact with and slide relative the outlet surface (5) while changing the open area of the outlet openings.

2. An air terminal device according to claim 1 wherein said plurality of outlet openings (4) are arranged along one or several edges (7, 7a, 7b,7c,7d) of the outlet surface (5).

3. An air terminal device according to claim 2 wherein said area of the outlet openings (4) are changed to be smaller by moving the cover plate (6a, 6b) towards the edge or edges (7, 7a, 7b,7c,7d) of the outlet surface (5).

4. An air terminal device according to claim 1 wherein said plurality of outlet openings (4) are shaped as elongated slits.

5. An air terminal device according to claim 4 wherein said elongated slits are arranged such that their longitudinal extension direction is angled less than 30 degrees relative its closest edge.

6. An air terminal device (1) according to claim 1 wherein said first and second cover plates (6a, 6b) are arranged to move non linearly, e.g. by a circular or orbital motion, when sliding in order to change the area of the outlet openings (4).

7. An air terminal device (1) according to claim 6 wherein the first and second cover plates (6a, 6b) are moved by a rotating actuator.

8. An air terminal device (1) according to claim 7 wherein the outlet surface (5) has been provided with a first actuating rod (11) attached to the first cover plate (6a) at its first end (11a) and attached to the second cover plate (6b) at its second end (11b) and having a pivotal point (11c) attached at the centre of the first rod (11) to the outlet surface (5), said first actuating rod being connected to the rotating actuator so as to be rotated around its pivotal point (11c).

9. An air terminal device (1) according to claim 8 wherein the outlet surface (5) has also been provided with a second actuating rod (12) attached to the first cover plate (6a) at its first end (12a) and attached to the second cover plate 6b at its second end 12b and having a pivotal point (12c) attached at the centre of the first rod (11) to the outlet surface (5), said second actuating rod caused to rotate by the movement of the first and second cover plates (6a, 6b) induced by the first actuating rod (11).

10. An air terminal device (1) according to claim 1, wherein the plurality of outlet openings (4) are arranged on an outlet surface having at least four edges, e.g. a quadratic or rectangular surface, and there are provided outlet openings (4) along at least four edges.

11. An air terminal device (1) according to claim 10 wherein the first cover plate (6a) is arranged to change the area of the outlet openings (4) for openings along a first edge (7a) and a second edge (7b) being adjacent to each other and whereby the second cover plate (6b) is arranged to change the area of the outlet openings (4) for openings along a third edge (7c) and a fourth edge (7d) being adjacent to each other.

12. An air terminal device (1) according to claim 1 wherein the outlet openings (4) are directed to a mixing chamber (8) where to a stream of air from the space to be ventilated is induced by the flow of the supply air through the outlet openings (4) such that the stream of supply air is mixed with room air.

13. An air terminal device (1) according to claim 1 wherein the air terminal device is provided with an air temperature regulating device (9) in order to condition the air flowing through the air terminal device.

14. An air terminal device (1) according to claim 1 wherein there is at least one outlet opening being partly covered by a cover plate (6a, 6b) also when the device is set to maximum flow.

15. An air terminal device (1) according to claim 1 wherein said cover plates are made of a thin flexible sheet, e.g. a sheet having a thickness of 0.15 to 0.60 mm made of a polymer.

16. An air terminal device (1) according to claim 15 wherein said cover plates (6a, 6b) are located on the high pressure side of the outlet surface (5).

17. The air terminal device according to claim 2, wherein said plurality of outlet openings are shaped as elongated slits.

18. The air terminal device according to claim 3, wherein said plurality of outlet openings are shaped as elongated slits.

19. The air terminal device according to claim 4, wherein said elongated slits are arranged such that their longitudinal extension direction is angled less than 30 degrees relative its closest edge, arranged such that their longitudinal extension direction is essentially perpendicular to the extension direction of the closest edge.

20. The air terminal device according to claim 10 wherein the first cover plate is arranged to change the area of the outlet openings for openings along a first edge and a second edge being adjacent to each other and whereby the second cover plate is arranged to change the area of the outlet openings for openings along a third edge and a fourth edge being adjacent to each other, by the at least two cover plates are arranged to change the configuration at all groups outlet openings simultaneously by moving the cover plates in different directions.