A DEVICE FOR SUPPLYING AIR TO A ROOM

Abstract: A device for supplying air to a room comprises a body (5) having channels for flow of intake air and room air respectively. The channels (6, 7) are arranged in an alternate relation and have outlet openings (8, 9) located in the same side (10) of the body. The channels (7) intended for room air have second openings (16) in another side (17) of the body. The first channels for intake air have inlet openings located in a side of the body which is disposed in an opposite relation to the side (17) where the second openings (16) of the second channel are located. Flow of intake air in the first channels will induce a flow of room air in the second channels.

Description: A device for supplying air to a room. FIELD OF INVENTION AND PRIOR ART The present invention relates to a device for supplying air to a room in accordance with the preamble of appen- dant claim 1. Such a device is known by the DE-patent 386 899. In this known device, a flow of air from the room is obtained within a housing by means of a fan, the air from the room being introduced at the bottom through an inlet and discharged at the top through an outlet. This room air is forcibly passed through the second channels of the body arranged within the housing and is the cause of suction of intake air through the first channels. The outlet openings of the two channels open within the housing. Thus, suction of intake air by means of a forced circula¬ tion of room air is obtained according to this patent. BRIEF DISCLOSURE OF THE INVENTION The object of the present invention is to develop the known device so that it while ensuring efficient supply of intake air will be as simple as possible without causing unsatisfactory comfort by the supply of intake air having low temperature. This object is primarily obtained by the features defined in the characteristic portion of appendant claim 1. Due to this design, the room air may pass into the second channels at the side of the body which faces towards the center of the room, thereby causing a most efficient mixing of the intake air with the room air. This is par¬ ticularly due when the body in order to control the flow of intake air is displacably received in a holder so that varying restriction of the outlet openings of the first channels may be obtained. Since the first openings OMPl .-• -_ WiPO . of the first channels and the first and second openings of the second channels communicate directly with the air in the room, a simple embodiment is obtained without surrounding housing etc., said embodiment causing, on forced flow of intake air into the first channels, effi¬ cient mixing of intake air with the secondary flow of room air induced in the second channels. SHORT DESCRIPTION OF THE DRAWINGS With reference to the appended drawings, a more specific disclosure of an embodiment example of the invention will follow hereinafter. In the drawings; fig 1 is a diagrammatical view illustrating the appli¬ cation of the device according to the invention; fig 2 is a perspective view of the device from its front side; fig 3 is a perspective view of a holder in the device viewed from the rear side; fig 4 is a view of the channel body obliquely from above; fig 5 is a view of the channel body obliquely from behind; fig 6 is a view similar to fig 3 of an alternative holder; fig 7 is a perspective view of an alternative channel body; and fig 8 is a view illustrating the construction of the body in fig 7. DETAILED DISCLOSURE OF A PREFERRED EMBODIMENT (FIGS 1-5) The device 1 according to the invention is in fig 1 illust¬ rated as mounted to the inner side of a wall 2 in a building On the inner side of the wall, there is a room indicated at 3. In this case, the room 3 communicates with the outdoor atmosphere on the other side of the wall via an opening 4 allowing flow of intake air. The intake air arriving through opening 4 is conveyed into the room 3 through the device 1 according to the invention. is conceivable to arrange a fan for forced introduction of the intake air into the room 3 in connection with the opening 4. Alternatively, the flow of intake air may be effected by sucking air from the room 3 through an evacuation channel not illustrated. Instead of having the device 1 communicating with an opening to the outdoor air, device 1 could of course receive intake air, possible preheated, via a line or the like arriving from a heat • exchanger. As appears from figs 2-5, the device comprises a body 5 having channels 6 and 7 for flow of intake air and room air respectively. The body 5 has a parallel epipedic shape. The parallel epiped is more specifically right angled and of a longish form. It is preferred that the body, in cross section, is square. The channels 6 and 7 are plate like and arranged in a generally parallel relation. The channels 6 are primarily intended for conveying intake air into the room while the channels 7 are intended for flow of room air caused by induction by the flow of intake air. The first and second channels 6 and 7 are arranged in an alternate relation so that a first channel 6 is followed by a second channel 7 etc. The channels 6 and 7 have first openings 8 and 9 respectively opening at one and the same side 10 of the body. Furthermore, the channels 6 have second openings 11 opening in another side 12 of the body. The sides 10 and 12 are in this case adjacent and right angled in relation to each other. The channels 6 have confining surfaces 13 extending diagonally through the body so that each of the channels 6 has a triangular shape. The second channels 7 have openings 14 located in a side 15 of the body which is situated opposite to the side 10 where the openings 8 and 9 open. Furthermore, the channels 7 have openings 16 located in a side 17 of the body which is situated in an opposite relation to the side 12 of the body where the openings 11 of the channels 6 are located. Thus, the channels 7 will be open along three longitudinal sides of the body 5 and are closed at the forth side by means of portions 18, which form connecting bridges in that the body viewed from above as in fig 4 has a comb like design. Thus, the channels 7 will obtain a rectangular shape. The channel body 5 is preferably manufactured by milling the channels out of a solid body, partitions 19 of required thickness being ' left between the channels. The holder 38 contained in the device is adapted to hold the body in such a position in relation to the intake air line 4 that intake air therefrom may flow into the channels 6 via openings 11 and from the channels out into the room 3 via openings 8. The body 5 is displacably received in a cavity 20 in the holder and has the openings 8 of channels 6 cooperating with a holder portion 21 confining the cavity in order to obtain restriction of the openings 8 on displacement of the body 5 into the holder and vice versa. Also the cavity 20 has a parallelepipedic, right angled shape in correspondence to body 5 and the body is further¬ more displacable reciprocatingly in the cavity in a straight path. The body 5 is preferably manufactured by a plastics material and is dimensioned in such a manner in relation to the cavity that the body by friction remains in an adjusted position but does not present excessive resistance to displacement by hand. For the openings 8 to communicate with the room, the body 5 must protrude out of the holder through the forward opening 22 of the cavity. The holder 38 is adapted to be secured to the wall 2 or other support so that the rear opening 23 of the cavity 20 is in connec¬ tion with the intake air line 4. The cavity is restricted by four parallel wall portions 25 connected to a forward rectangular base portion 24 of the holder. This base portion merges into four wall portions 26, which are parallel to wall portions 25 and adapted to abut against the support. Means are provided for restricting the displacement of the body 5 into the cavity 20 to a position, wherein the outlet openings 8 of channels 6 still communicate with room 3. In this way a certain minimum intake air opening is obtained. Said restricting means form part of a device 27 for securing the holder 38 to a support. The securing device is formed by a plate 27 which is attached to the holder and perforated in order to allow penetration by securing members such as screws. The plate 27 extends across the cavity 20 and is exposable, as viewed from the front side of the holder, by removing body 5 from the holder. Thus, the holder may be secured to the support by introducing screws and tightening tools through the cavity. The plate extends across the cavity at its rear end 23 and is at its outer edges secured to wall portions 26 and possibly also to wall portions 25. The perforated plate 27 also forms a filtrating member. When intake air flows through the channels 6 in the body, this flow will give rise to a secondary flow of room air in the adjacent channels 7, which through the alter¬ nate arrangement of the channels causes an efficient mixture of the intake air and the room air and in this way increased comfort, in particular when there are con¬ siderable temperature differences between intake air and room air. DISCLOSURE OF AN ALTERNATIVE HOLDER EMBODIMENT In fig 6 an alternative holder embodiment is illustrated which generally is similar to the previously disclosed embodiment but which has the wall portions 26 removed or considerably shorter so that the wall portions 25 may protrude into an intake air line opening in a wall, whereby the holder will protrude into the room to a mini¬ mum extent. The securing device comprises in this case ears 30 on two opposite sides of the holder, said ears being adapted to engage the inside of the intake air line and associated to members 28 extending across cavity 20. The members 28 are formed by end portions of the band pieces forming the resilient ears 30, said end portions being bent in right angle. In the normal case, it is preferred to locate the outlet openings 8 of channels 6 upwardly but also other orien- tation will make the channels 7 to give rise to a diluting flow of room air. DESCRIPTION OF AN ALTERNATIVE EMBODIMENT OF THE CHANNEL BOD The channel body illustrated in fig 7 has as. in the previous case channels 6 for intake air and channels 7 for room air. The channels 7 differ from the channels in the previously described embodiment in that the channels 7 as well as the channels 6 are triangular. Thus, channels 6 and 7 have openings in one and the same side 10 of the body. Furthermore, the channels have additional ope- nings located in opposite sides 12 and 17 respectively of the body. The side 15 of the body which is in opposite relation to the side 10 is accordingly closed. As appears from fig 8, the body according to fig 7 may be produced -by putting together, in the manner indicated,, a number of rectangular and triangular plate elements. By varying the number of plate elements, the length of the body may be varied. A cubic shape of the body is often preferable since such a shape makes it possible to locate the body in " many alternate locations in a holder provided with a corresponding cavity.

Claims: Claims 1. A device for supplying air to a room, comprising a body (5) having plate-like generally parallel first and second channels (6, 7), which are arranged in an alternate relation so that a first channel is followed by a second channel etc, said channels having first openings (8, 9) located at one and the same side (10) of the body, said channels having second openings (11, 16) located at two other sides (12, 17) of the body, said second openings ( 11 ) of the first channels (3) communicating with a line (4) for supply of intake air, c h a r a c t e r i z e d in that the second openings (16) of the second channels (7) are located at a side (17) of the body which is situ¬ ated in opposed relation to the side (12) of the body where the second openings (11) of the first channels (6) are located and that the first and second openings (9, 16) of the second channels (7) communicate directly with the air in the room so that a flow of intake air into the room through the first channels (6) induces a secondary flow of air from the room through the second channels ( 7) . 2. A device according to claim 1, c h a r a c t e r i z e d in that the body is composed of rectangular and triangular plate elements (1, 2). 3. A device according to claim 1, c h a r a c t e r i z e d in that the body (5) is displaceably received in a cavity (20) in a holder (38) and has the outlet openings (8) of the first channels cooperating with a holder portion (21) confining the cavity in order to obtain restriction and liberation respectively of the outlet openings (8) of the first channels on displacement of the body into and out of the holder (38). 4. A device according to claim 3, c h a r a c t e r i z e d in that the- body (5) and the cavity (20) have parallelepi- pedic shape and that the body is reciprocatingly displace- able in the cavity in a straight path. 5. A device according to claim 3, c h a r a c t e r i z e d in that means (27, 28) are provided for limiting the displacement of the body into the cavity to a position, wherein the outlet openings (8) of the first channels still communicate with the room (3). 6. A device according to claim 5, c h a r a c t e r i z e d in that said limiting means form part of a device for securing the holder to a support or a base. 7. A device according to claim 6, c h a r a c t e r i z e d in that the securing device is formed by a plate (27) attached to the holder and perforated to allow penetra¬ tion by securing members such as screws. 8. A device according to claim 7, c h a r a c t e r i z e d in that the plate (27) extends across the cavity (20) and is at least in part exposable, as viewed from the forward side of the holder, by removing the body (5) from the holder. 9. A device according to claim 6, c h a r a c t e r i z e d in that the securing device comprises ears (30) arranged on two opposite sides of the holder, said ears being associated to members (28) extending across the cavity.

Inventors: BERGDAHL KNUT, BERGDAHL, KNUT
Applicants: BERGDAHL KNUT, BERGDAHL, KNUT
Application year: 1983
Main classification: F24F13
IPC codes: F24F13