Device and method for controlling a supply air flow at a comfort cassette

1. A comfort cassette ( 1 ) comprising:

a pressure box ( 2 ) with at least one inlet ( 3 ) for inflow of supply air flow (L 1 ) to the pressure box ( 2 ) and a plurality of outlets ( 4 ) for outflow of the supply air flow (L 1 ) out of the pressure box ( 2 ),

the outlets ( 4 ) of the pressure box ( 2 ) being arranged along more than two edges ( 5 a , 5 b , . . . 5 n ) of an underside of the pressure box ( 2 ),

the outlets ( 4 ) of the pressure box ( 2 ) forming a group ( 6 a , 6 b , . . . 6 n ) of outlets per edge ( 5 a , 5 b , . . . 5 n ) of the pressure box ( 2 ),

each respective group ( 6 a , 6 b , . . . 6 n ) of outlets ( 4 ) of the pressure box ( 2 ) being arranged to direct the supply air flow (L 1 ) to a respective mixing chamber ( 7 b , . . . 7 n ) per group ( 6 a , 6 b , . . . 6 n ),

the comfort cassette ( 1 ) further comprising at least one coupled heat a exchanger ( 9 ) arranged to alternatively cool or heat a through-flowing air stream by heat exchange, and a circulation air flow (L 2 ) being arranged to flow from a premises (A) through the heat exchanger ( 9 ) due to an induction effect driven by passage of supply air flow (L 1 ) out of the outlets ( 4 ) to the respective mixing chamber ( 7 b , . . . 7 n ),

the respective mixing chamber ( 7 b , . . . 7 n ) being arranged to unite the supply air flow (L 1 ) from the pressure box ( 2 ) and the circulation air flow (L 2 ), following conditioning of the circulation air flow (L 2 ) by the heat exchanger ( 9 ), into a common air stream (L 1 +L 2 ) and to guide the common air stream (L 1 +L 2 ) to a respective outlet opening ( 10 b , . . . 10 n ) for outflow to the premises (A),

the outlets ( 4 ) of the pressure box ( 2 ) being arranged according to a configuration which is changeable by displacement of outlets ( 4 ′) of a cover member ( 8 ) in relation to the outlets ( 4 ) of the pressure box ( 2 ), the cover member ( 8 ) being located between the heat exchanger ( 9 ) and the underside of the pressure box and the cover member ( 8 ) extending from adjacent a first edge ( 5 a , 5 b , . . . 5 n ) of the pressure box to adjacent a second opposed edge ( 5 a , 5 b , . . . 5 n ) of the pressure box for movement toward and away from the first and second edges of the pressure box ( 2 ) between the heat exchanger ( 9 ) and the underside of the pressure box, and the outlets ( 4 , 4 ′) of the pressure box and the cover member being arranged so that an outflow of the common air stream (L 1 +L 2 ) flows out from the outlet openings in more than two directions,

the outlets ( 4 ′) of the cover member ( 8 ) being arranged to change a configuration of all groups ( 6 a , 6 b , . . . 6 n ) of outlets ( 4 ) simultaneously by movement of the cover member ( 8 ) in only a single direction of movement, and

the supply air flow (L 1 ) and thereby also the common air stream (L 1 +L 2 ) out of the comfort cassette ( 1 ) being changeable in more than two directions by only a single movement of the cover member ( 8 ), whereby the outflow of the common air stream (L 1 +L 2 ) out from the outlet openings is controlled in more than two directions by the single movement of the cover member.

2. The comfort cassette ( 1 ) according to claim 1 , wherein the cover member ( 8 ) is designed as a pate with portions close to the groups ( 6 a , 6 b , . . . 6 n ) of outlets ( 4 ), and the pate being arranged to move linearly whereby the configuration of all groups ( 6 a , 6 b , . . . 6 n ) of the outlets ( 4 ) simultaneously change.

3. The comfort cassette ( 1 ) according to claim 1 , wherein an opening degree of each respective outlet ( 4 ) of the pressure box ( 2 ) is step-less adjustable from 0-100%.

4. The comfort cassette ( 1 ) according to claim 1 , wherein the outlets ( 4 ) are arranged along four edges ( 5 a , 5 b , 5 c , 5 d ) of the pressure box ( 2 ) and the outflow of the common air stream (L 1 +L 2 ) flows out from the respective outlet opening ( 10 b , 10 d ) simultaneously in four different directions, so-called four-way air distribution, whereby an air flow is controlled in all four directions by a change of a configuration of the outlets ( 4 ).

5. The comfort cassette ( 1 ) according to claim 1 , wherein at least one actuator ( 12 ) is arranged at the comfort cassette ( 1 ), the at least one actuator ( 12 ) is further arranged to cooperate with the cover member ( 8 ) to provide the change of configuration of the groups ( 6 a , 6 b , . . . 6 n ) of the outlets ( 4 ).

6. The comfort cassette ( 1 ) according to claim 5 , wherein the pressure box ( 2 ) comprises at least one pressure measuring socket ( 13 ), useful for representative control of a static pressure (ps) in the pressure box ( 2 ), and the static pressure (ps) in the pressure box ( 2 ) and a position of the at least one actuator ( 12 ) is recordable, and the supply airflow (L 1 ) in the comfort cassette ( 1 ) is calculable based on the static pressure (ps) and the position of the at least one actuator ( 12 ).

7. A method for controlling supply air flow (L 1 ) at a comfort cassette ( 1 ), comprising a pressure box ( 2 ) with at least one inlet ( 3 ) for inflow of supply air flow (L 1 ) to the pressure box ( 2 ) and a plurality of outlets ( 4 ) for outflow of the supply air flow (L 1 ) out of the pressure box ( 2 ), the outlets ( 4 ) of the pressure box ( 2 ) are arranged along more than two edges ( 5 a , 5 b , . . . 5 n ) of an underside of the pressure box ( 2 ), wherein the outlets ( 4 ) of the pressure box ( 2 ) form a group ( 6 a , 6 b , . . . 6 n ) of outlets per edge ( 5 a , 5 b , . . . 5 n ) of the pressure box ( 2 ), and each respective group ( 6 a , 6 b , . . . 6 n ) streams the supply air flow (L 1 ) to a respective mixing chamber ( 7 b , . . . 7 n ) per group ( 6 a , 6 b , . . . 6 n ), the comfort cassette ( 1 ) further comprising at least one coupled heat exchanger ( 9 ) arranged alternatively to cool or heat a through-flowing air stream by a heat exchange, and a circulation air flow (L 2 ) flows through the heat exchanger ( 9 ) from a premises (A) due to induction effect driven by a passage of supply air flow (L 1 ) out of the outlets ( 4 ) of the pressure box ( 2 ) to the respective mixing chamber ( 7 b , . . . 7 n ), and the respective mixing chamber ( 7 b , . . . 7 n ) unites the supply air flow (L 1 ) and the circulation air flow (L 2 ), conditioned by the heat exchanger ( 9 ), to a common air stream (L 1 +L 2 ) and guides the common air stream (L 1 +L 2 ) to a respective outlet opening ( 10 b , . . . 10 n ) for outflow to the premises (A) simultaneously in different directions, the outlets being arranged so that an outflow of the common air stream (L 1 +L 2 ) flows out from the outlet openings in more than two directions, the method comprising:

arranging the outlets ( 4 ) of the pressure box ( 2 ) according to a configuration which is changeable by outlets ( 4 ) of a cover member ( 8 ) which is displaced in relation to the outlets ( 4 ),

locating the cover member ( 8 ) between the heat exchanger ( 9 ) and the underside of the pressure box and extending the cover member ( 8 ) from adjacent a first edge ( 5 a , 5 b , . . . 5 n ) of the pressure box to adjacent a second opposed edge ( 5 a , 5 b , . . . 5 n ) of the pressure box for movement toward and away from the first and second edges of the pressure box ( 2 ) between the heat exchanger ( 9 ) and the underside of the pressure box,

performing step-less movement of the cover member ( 8 ), and forming the outlets ( 4 ) of the pressure box and the outlets ( 4 ) of the cover member ( 8 ) as elongated slots which are orientated longitudinally in a direction of movement of the cover member ( 8 ), whereby an opening degree of the respective outlet ( 4 ) of the pressure box ( 2 ) is step-less adjustable from 0-100%,

simultaneously changing the configuration at all groups ( 6 a , 6 b , . . . 6 n ) of the outlets ( 4 ) by a movement of the cover member ( 8 ) in only one direction, and

changing the supply air flow (L 1 ), and thereby also the common air stream (L 1 +L 2 ) out of the comfort cassette ( 1 ), in more than two directions by only movement of the cover member ( 8 ) in a single direction, whereby the outflow of the common air stream (L 1 +L 2 ) out from the outlet openings is controlled in more than two directions by the single movement of the cover member.

8. The method according to claim 7 , further comprising linearly changing movement of the cover member ( 8 ).

9. The comfort cassette ( 1 ) according to claim 5 , wherein the outlets ( 4 ) of the pressure box ( 2 ) and the outlets of the cover member ( 8 ) are all formed as elongated slots which are orientated longitudinally in a direction which extends parallel to the direction of movement of the cover member ( 8 ).

10. The method according to claim 7 , further comprising at least one actuator ( 12 ) cooperating with the cover member ( 8 ) to provide the change of configuration of the groups ( 6 a , 6 b , . . . 6 n ).

11. The method according to claim 10 , further comprising the pressure box ( 2 ) comprises at least one pressure measuring socket ( 13 ), useful for representative control of static pressure (ps) in the pressure box ( 2 ),

registering the static pressure (ps) in the pressure box ( 2 ) and a position of the at least one actuator ( 12 ), and

calculating a real supply airflow (L 1 ) in the comfort cassette ( 1 ) based on the static pressure (ps) and the position of the at least one actuator ( 12 ).

12. The method according to claim 11 , further comprising moving, at a detected need of change of air flow and/or comfort in the premises, the cover member ( 8 ), via the at least one actuator ( 12 ), to regulate a desired set point based on the supply air flow (L 1 ).

13. A comfort cassette ( 1 ) comprising:

a pressure box ( 2 ) having at least one inlet ( 3 ) for inflow of supply air flow (L 1 ) into the pressure box ( 2 ) and a plurality of outlets ( 4 ) for outflow of the supply air flow (L 1 ) out of the pressure box ( 2 ),

the outlets ( 4 ) of the pressure box ( 2 ) being arranged on an underside (U) of the pressure box ( 2 ) along at least four edges ( 5 a , 5 b , . . . 5 n ) thereof,

the outlets ( 4 ) being combined so as to form groups ( 6 a , 6 b , . . . 6 n ) of outlets located along each edge ( 5 a , 5 b , . . . 5 n ) of the pressure box ( 2 ),

each respective group ( 6 a , 6 b , . . . 6 n ) of outlets ( 4 ) being arranged to direct the supply air flow (L 1 ) toward a respective mixing chamber ( 7 b , . . . 7 n ) associated with each group ( 6 a , 6 b , . . . 6 n ),

the comfort cassette ( 1 ) further comprising at least one coupled heat exchanger ( 9 ) arranged to alternatively cool or heat a through-flowing air stream flowing from a premises (A) through the heat exchanger ( 9 ) due to an induction effect caused by passage of supply air flow (L 1 ) out of the outlets ( 4 ) to the respective mixing chamber ( 7 b , . . . 7 n ),

the respective mixing chamber ( 7 b , . . . 7 n ) being arranged to unite the supply air flow (L 1 ) from the outlets ( 4 ) with the circulation air flow (L 2 ), following conditioning of the circulation air flow (L 2 ) flowing through by the heat exchanger ( 9 ), into a common air stream (L 1 +L 2 ) and to guide the common air stream (L 1 +L 2 ) to a respective outlet opening ( 10 b , . . . 10 n ) for outflow to the premises (A),

a single cover member ( 8 ), having a plurality of openings ( 4 ′) being located between the heat exchanger ( 9 ) and the undersurface of the pressure box, which extends parallel to a surface of the heat exchanger ( 9 ) which faces toward the underside (U) of the pressure box ( 2 ), and the single cover member ( 8 ) extending from adjacent a first edge ( 5 a , 5 b , . . . 5 n ) of the pressure box to adjacent a second opposed edge ( 5 a , 5 b , . . . 5 n ) of the pressure box between the heat exchanger ( 9 ) and the underside (U) of the pressure box, the outlets ( 4 ) of the cover member ( 8 ) being arranged according to a configuration which is changeable by displacement of the single cover member ( 8 ) relative to the outlets ( 4 ) of the pressure box ( 2 ), and the outlets being arranged so that an outflow of the common air stream (L 1 +L 2 ) flows out from the outlet openings in more than two directions,

the outlets ( 4 , 4 ′) of the pressure box and the cover member each being formed as elongated slots which are orientated along the direction of displacement of the single cover member ( 8 ),

the single cover member ( 8 ) being arranged to change a configuration of all groups ( 6 a , 6 b , . . . 6 n ) of the outlets ( 4 ) simultaneously by movement of the single cover member ( 8 ) in only a single direction of movement away from the first edge of the pressure box ( 2 ) toward the opposite second edge of the pressure box ( 2 ) or vice versa, and

the supply air flow (L 1 ), and thereby also the common air stream (L 1 +L 2 ) out of the comfort cassette ( 1 ), being changeable in more than two directions by movement of the single cover member ( 8 ) either toward or away from the first edge of the pressure box ( 2 ), whereby the outflow of the common air stream (L 1 +L 2 ) out from the outlet openings is controlled in more than two directions solely by the movement of the single cover member.

14. The comfort cassette according to claim 13 , further comprising an actuator ( 12 ) which cooperates with the cover member ( 8 ) to move the cover member ( 8 ) either toward or away from the first edge of the pressure box ( 2 ).