Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
  • F24F13/26—Arrangements for air-circulation by means of induction, e.g. by fluid coupling or thermal effect
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
  • F24F1/01—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station in which secondary air is induced by injector action of the primary air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F2221/00—Details or features not otherwise provided for
  • F24F2221/14—Details or features not otherwise provided for mounted on the ceiling

Definitions

• the invention concerns a supply air terminal device.
• This application presents a supply air terminal device of a new type, wherein the . circulated air is mixed in an internal mixing chamber with the fresh supply air without heating or cooling the circulated air.
• Internal circulation of air in the device is a way of avoiding expensive recirculated air solutions through the supply air terminal unit and at the same time of preventing impurities from spreading from one room space to another.
• the primary air is blown into the device tlirough nozzles.
• the secondary room air is taken into the device by way of controlled flow routes.
• the flow of secondary air is brought about by using the induction effect of the primary air.
• the primary air and the secondary air are mixed within the device before the air discharges from the device into the room space.
• the ratio of secondary air can be controlled by using an internal control part in the supply air terminal device either manually or using an electric - motor. Motor control is controlled with the aid of a separate control device or control algorithm.
• the device may also function as a condensing device, whereby it is equipped with a condensate removal fitting.
• the device can be used for controlling the room air velocity and thus for controlling comfort conditions irrespective ofthe flow of supply air.
• the supply air terminal device is characterised in that its supply air jet behaves almost like an isothermal jet, whereby in a cooling situation it is possible to prevent the supply air jet from dropping directly into the occupied zone and thus significantly to avoid the risk of draught, and in a heating situation it is possible to avoid un unfavourable temperature stratification in the ceiling.
• the behaviour of the inducing supply air terminal device also guarantees an efficient mixing of room air and a high efficiency of ventilation. Owing to its characteristics, the inducing supply air terminal device is especially suitable for such service situations, where the primary air used as supply air is significantly cooler or warmer than the room air.
• the supply air temperature may vary significantly in different service situations of the installation, or the air volume of supply air, that is, of the primary airflow, may change during serv- ice.
• the supply air terminal device which strongly induces the circulated air, may be used e.g. in the following cases: in cases where unheated supply air is used as the primary air, in air heating systems, in installations, where cold storages are used to level out electric energy consumption peaks round the clock, ,
• variable air volume systems to guarantee that the shape of the air jet remains unchanged irrespective ofthe primary air volume
• standard air volume systems to control comfort conditions by controlling the induction ratio
• a new type of supply air terminal device is de- signed, wherein the equipment includes a supply air chamber, from which the supply air is made to flow through a nozzle or preferably through several nozzles at a high velocity into an internal mixing chamber of the device, whereby the said flow of supply air will induce a circulated airflow from the room to flow to join the flow of supply air in the mixing chamber.
• the circulated airflow is thus drawn with the aid of the supply airflow into the mixing chamber, and the combined airflow will leave the device.
• the combined airflow moves freely into the room space through a flow gap extending over the length of the device or through a round or annular flow aperture without any perforated surface or such that would slow down the airflow.
• the device is thus efficient and it can be used to circulate great air volumes of room air.
• the circulated airflow is neither heated nor cooled by a heat exchanger, but the circulated airflow arrives from the room space to join the primary airflow directly.
• the air is conducted from the room space induced by the supply airflow L x to join this, and the combined airflow X ⁇ + L 2 is conducted from the mixing chamber through an elongated flow gap or aperture into the room space.
• the airflow conducted from the supply air chamber through a nozzle or preferably through nozzles is called the primary airflow, that is, the supply airflow
• the airflow induced by the primary airflow and conducted from the room space is called the circulated airflow, that is, the secondary airflow, in this application.
• control of the induction ratio has also become necessary in certain applications. This means that it is possible to control the ratio Q 2 /Q ⁇ between the flow volumes Q 2 and Q] ofthe circulated airflow L 2 and the supply airflow L,.
• the present application proposes use of a separate induction ratio control device.
• the induction ratio control device is formed by a structure, where the flow of circulated air from the room space is controlled by controlling the position of apertures in a movable aperture plate, which is located in connec- tion with a fixed aperture plate, in relation to the apertures in an aperture plate located in a fixed position.
• the flow of circulated air can be throttled into the circulated airflow device on the supply side, and in this manner the induction ratio between flows L 2 and L x is controlled.
• Control may also take place by controlling the combined airflow L t + L 2 of supply airflow and circulated airflow.
• control device may also be located on the supply side of side chamber B l5 whereby e.g. by a plate movable in a linear direction the flow path of the circulated airflow L 2 is controlled, and at the same time the concerned flow L 2 of circulated air is controlled and the induction distance is affected.
• the control plate may be located in the direction of the other duct wall of mixing chamber Bi and it may be movable in its direction, e.g. by remote control by a motor or manually.
• such a control device may also be used, which is formed by a set of nozzles formed by nozzles in two separate rows opening from the supply chamber for fresh air, whereby the nozzles in the first row are formed with a larger cross- sectional flow area than the nozzles in the second row.
• a control device is located, which is formed by an aperture plate used for controlling the flow between the nozzle rows ofthe said nozzles.
• the supply air terminal device according to the invention is characterised by the features presented in the claims.
• Figure 1 A is an axonometric view of a supply air terminal device according to the invention, which is open at the bottom and closed at the top and on the sides.
• Figure IB is a cross-sectional view along line I-I of Figure 1A.
• Figure IC shows a supply air terminal device equipped with an induction ratio control device.
• Figure ID is a cross-sectional view along line II— II of Figure IC.
• Figure IE is an axonometric separate view of the structure of the induction ratio control device.
• Figure 2 shows an embodiment ofthe induction ratio control device according to the invention, wherein the control device is located in side chamber x .
• Figure 3 A shows a third advantageous embodiment of an induction ratio con- trol device, wherein the control device is fitted to be located on one side wall of side chamber B l5 that is, in the air guiding part, to close and open the flow path into the side chamber B .
• Figure 3B is an axonometric view of a moving mechanism for the control damper of a control device according to Figure 3 A.
• Figure 3C shows an embodiment of the invention, wherein there is a separate turning control damper, which can be used for controlling the induction ratio between the flows L 2 and I ⁇ .
• the damper is fitted to turn in a pivot point, which is located on a side surface ofthe supply air chamber.
• Figure 3D shows a device according to the invention, wherein nozzles opening from the supply air chamber direct the supply airflow on to the ceiling of the room space, whereby due to the coanda effect the flow will cling to the ceiling and the supply air flow will draw the circulated airflow along with it centrally from the room.
• Figure 4 A shows an embodiment ofthe induction ratio control device, wherein the device includes two nozzle rows 12a l5 12a 2 ... and 12b l5 12b 2 ... for the primary air flow L whereby from between the nozzles ofthe nozzle rows the flow ratio is controlled with the aid of a control plate located in the supply chamber for the primary airflow, which control plate includes flow apertures fi,f 2 ... for the nozzles of one nozzle row 12a l5 12a 2 ... and flow apertures tj,t 2 ... for the nozzles 12b ! ,12b 2 ... ofthe other nozzle row.
• Figure 4B shows the area X x of Figure 4A.
• Figure 5 shows an embodiment of the induction ratio control device, wherein the supply chamber for the primary airflow on both sides of vertical central axis Y x in the supply air chamber includes two nozzle rows, whereby the nozzles in the nozzle rows have different cross-sectional flow areas, and the airflow to the nozzles is controlled by an internal tube having flow apertures by rotating the tube, whereby depending on the angle of rotation of the tube, the flow is controlled through nozzles ofthe different nozzle rows, and in this manner the flow velocity of flow in the mixing chamber is controlled and thus the induction ratio between flows ⁇ _ x and L 2 is controlled.
• Figure 6A shows an embodiment of the invention, wherein the circulated airflow is conducted from above into the mixing chamber to join the supply airflow L l5 and the combined airflow is made to flow through the lower flow gap ofthe mixing chamber into the room space.
• Figure 6B shows the device solution of Figure 6A equipped with the induction ratio control device.
• Figure 7 A shows an embodiment, wherein the circulated airflow is conducted from the side ofthe device into the mixing chamber to join the supply airflow.
• Figure 7B shows the device solution of Figure 7A equipped with the induction ratio control device.
• Figure 8 A shows an embodiment of the invention, wherein the supply airflow is directed from the nozzles directly downwards from the supply air chamber towards the central flow aperture T 2 , while the circulated airflow is directed from above into the side chamber and further from the side to join the supply airflow, whereby the combined airflow is made to flow downwards in the device.
• Figure 8B shows the device solution of Figure 8A equipped with the induction ratio control device.
• Figure 9A shows a model closed at the top and on the sides, wherein each side chamber B x is limited by a separating wall and a side wall and wherein the circulated airflow is directed from below to join the supply airflow to the central part of the device into the space between the separating walls, and the combined airflow is conducted further downwards and out ofthe device.
• Figure 9B shows the device solution of Figure 9 A equipped with the induction ratio control device.
• Figures 10A-10J show how the embodiments of supply air terminal devices presented above are located in the room space.
• the figures are vertical cross- sections of the room space and they show different throw patterns of the supply air jet ⁇ L X + L 2 with different positions and variations ofthe devices.
• the invention includes a supply air chamber for the supply air, from which the fresh supply air is distributed through nozzles into an internal mixing chamber of the device, into which the circulated airflow is also conducted from the room space induced by the mentioned supply airflow.
• the supply air chamber includes several nozzles located side by side and preferably fitted to form one or more nozzle rows. Such an embodiment is also possible within the scope of the invention, wherein the nozzles are replaced by one or more elongated nozzle gaps.
• Figure 1 A is an axonometric view of the supply air terminal device 10.
• Figure 1 A shows a model, which is closed at the top and on the sides and wherein the internal mixing chamber/chambers B x of the device are limited by side plates 10b and end plates lOd, of which one end wall lOd is cut open in part in Fig- ure 1A to show the internal structures.
• the mixing chamber/mixing chambers Bjare limited by the bottom wall 111 of the supply air chamber 11.
• the structure shown in Figure 1A opens only at the bottom into room space H as shown in the figure. Fresh air is conducted by way of the supply duct into supply chamber 11, from which the air is conducted further through nozzles 12a l5 12a 2 ...
• supply air means that supply air, which is conducted from supply air chamber 11 through the nozzles into mixing chamber B x and which induces the circulated airflow L 2 from room H into mixing chamber B x .
• the supply airflow is also called the primary airflow.
• the circulated airflow L 2 induced by the supply airflow x is also called the secon- dary airflow.
• the supply air terminal device 10 includes in between the air guiding parts 13 limiting side chambers B ! in the central area ofthe device and below supply air chamber 11 a free flow path El for the circulated airflow L 2 .
• a free flow path ⁇ x into side chambers B] from the central part ofthe device.
• the said air flow L 2 that is, the secondary airflow, is brought about by the primary airflow L x from nozzles 12a l5 12a 2 ... of supply chamber 11.
• the airflows L l5 L 2 are combined, and the combined airflow x + L 2 is made to flow to the side guided by the air guiding parts 13 located in the lower part of frame and by the side plates 10b of the supply air terminal device 10.
• Flow x + L 2 arrives through a gap or aperture T 2 in the room space in such a way that its velocity will not slow down essentially.
• the supply air terminal device includes no heat exchanger for heating or cooling the circulated airflow L 2 .
• the device shown in the figure may include such an arrangement as the induction ratio control device 15, wherein an assembly 130, which includes air guiding parts 13 and a connecting structure between them, including flow apertures l ⁇ bj or such for the circulated airflow L 3 , can be moved as one structural component towards the supply air chamber 11 and away from it as shown by arrow M x . By this move the induction ratio Q 2 /Q ⁇ between the flows L 2 and L t is controlled.
• reference number 130 indicates the movable assembly.
• Figure IB is a cross-sectional view along line I-I of Figure 1A of a first advantageous embodiment ofthe invention.
• Figure IB is suitable also as a cross- sectional view for such device solutions, wherein the supply air terminal device has a square cross section or a circular cross section.
• Supply air terminal device 10 includes a supply air chamber 11 for the fresh supply air, from which the air is conducted through nozzles 12a 1 ,12a 2 ... into the side or mixing chamber B x of the device and further into room space H.
• the supply air terminal device is a structure closed on the sides and at the top. With the aid of supply airflow L l5 circulated air L 2 is induced from below the device into side chamber B x .
• the combined airflow Lj + L 2 is made to flow away from the side chamber and to the side from the device, preferably at the level of the roof of the building, such as at ceiling level.
• the device will be located in such a way in relation to the ceiling level, that the bottom parts of the device frame are located at ceiling level, to which the combined airflow I- ! + L 2 is directed.
• Supply air terminal device 10 includes a free flow path E x for the circulated airflow L 2 into side air chamber Bj from below the supply air chamber 11 and centrally in such a way that the circulated airflow L 2 can be directed to both sides of the central axis Y x of the device.
• the supply air terminal device 10 includes in the supply air chamber a flow gap or, according to the most advantageous embodiment, several nozzles 12a l5 12a 2 ... side by side, from which the conducted fresh supply air will induce the circulated airflow L 2 to flow centrally in the device through the free flow path B x below supply air chamber 11 into side chamber B ⁇
• L x + L 2 are combined, and the combined airflow I- ! + L 2 is conducted to the side from the device in the direction ofthe ceiling level.
• supply air chamber 11 closes device 10 at the top.
• the side plates 10b and end plates lOd of the device frame R close the device on the sides.
• the device has a flow path O x for the combined airflow L x + L 2 between air guiding part 13 and side wall 10b away from side chamber B x and further in the direction ofthe ceiling level into the room space.
• the side plates of the device frame R and the air guiding parts 13 limit chambers B x at the side ofthe device.
• Air guiding part 13 and side plates 10b are shaped in such a way that the combined airflow L x + L 2 will flow in a horizontal direction to the side and preferably in the direction ofthe ceiling level and along this.
• an aperture plate 16bl in between the air guiding parts 13 of the device, whereby the circulated airflow L 2 conducted through the aperture plate is guided further into side chambers B x .
• the combined air flow x + L 2 is guided away from the device, preferably with the aid of air guiding parts 13 guided by these in a horizontal direction to the side.
• the device is symmetrical in relation to vertical central axis Y ⁇
• Figures 10A-10J show various location positions of supply air terminal devices in the room space.
• the device may also be used in a wall position or floor position or freely mounted. The same applies to the other device embodiments presented in this application.
• Figures IC, ID and IE show an embodiment otherwise similar to the one shown in Figures 1 A and IB, except that the device is equipped with a control device 15 for the induction ratio between flows L 2 and L ⁇
• the embodiment shown in Figure IB includes in between the air guiding parts 13 an induction ratio control device 15, which is used to control the flow volume of circulated airflow L 2 .
• the induction ratio Q 2 /Q ⁇ is controlled, wherein Q 2 is the flow volume of the circulated airflow L 2
• Q x is the flow volume of the supply airflow, that is, the primary airflow L x .
• the maximum induction ratio Q 2 /Q ⁇ is typically in a range of 2-6.
• ID and IE is formed by an aperture plate structure.
• the structure includes a second aperture plate l ⁇ aa movable in relation to a first aperture plate l ⁇ aj located in a fixed position (arrow Si indicates the linear motion), whereby the apertures a l5 a 2 ..., b l5 b 2 ... in aperture plates 16a ⁇ ,16a 2 can be placed in covering positions in relation to each other, whereby the total cross-sectional flow area through the aperture surface structure can be controlled and the circulated airflow L 2 through the aperture surface can thus be controlled. In certain service conditions the flow L 2 can be closed off entirely.
• FIG. 2 shows an embodiment otherwise similar to the one shown in Figure
• each side chamber B x includes a control device 15 for controlling the induction ratio between flows L x and L 2 .
• control device 15 is formed by an elongated damper 17, which can be turned supported by hinge 18 into different control positions in chamber B x . By turning an eccentric piece 19 the damper 17 is moved and different control positions are obtained for damper 17.
• Figure 3 A shows an embodiment of the invention, wherein the induction ratio control device 15 for controlling the induction ratio between the circulated airflow L 2 and the primary airflow x is formed by an elongated plate 20, which is moved in a linear direction to close and open a flow path E x for cir- culated airflow L 2 into mixing chamber B ⁇ Plate 20 of control device 15 closes and opens a flow path into side chamber __ ⁇ x . Plate 20 is located on one edge of side chamber B x in the upper part of chamber B x .
• flow L 2 is throttled, and at the same time the length ofthe flow path of flow L 2 is affected and thus the induction distance is affected, that is, that distance over which supply airflow ⁇ X induces the circulated airflow L 2 .
• Figure 3B is an axonometric view of the structure shown in Figure 3 A.
• Plate 20 can be positioned in different positions in relation to plate 13.
• Screw R x is placed through groove ul in plate 20 to be mounted to the plate, that is, to air guiding part 13 in its mounting hole.
• FIG 3C shows an embodiment of the invention, which is otherwise similar to the embodiment shown in Figure 3 A and in Figure 3B, except that plate 20 is formed as a turning damper 30, which is turned around pivot point IN ⁇ located close to nozzles 12a l5 12a 2 on a side surface of supply air chamber 11.
• Figure 3D shows a supply air terminal device according to the invention, including nozzles 12a b 12a 2 opening from a supply air chamber, whereby the supply air flow Li is conducted tlirough the nozzles directly to be close to ceiling K,. in the room, where due to the coanda effect it will cling and flow along the ceiling.
• Supply airflow L x induces a circulated airflow L 2 centrally through the device, and the induction ratio Q 2 /Q ⁇ between the flows L 2 and L x is controlled by an induction ratio control device 15, which includes a turning damper 20 turning at pivot point Nj in supply air chamber 11.
• the structure is symmetrical in relation to vertical central axis Y ⁇
• Figure 4A shows an embodiment ofthe invention, wherein the induction ratio control device 15 is fitted in connection with nozzles 12a 1 ,12a 2 ..., 12b l3
• Figure 4B shows the area X t of Figure 4A on an enlarged scale.
• supply air chamber 11 includes two nozzle rows side by side; a nozzle row formed by nozzles ⁇ 2%. x , ⁇ 2& , ..., wherein the cross-sectional flow area of the nozzles is larger than the cross-sectional flow area of the nozzles 12b 12b 2 ... in the lower row of nozzles.
• the supply airflow Li is throttled and controlled as desired.
• Figure 5 shows an embodiment of the supply air terminal device according to the invention, wherein the supply air chamber 11 is formed by a structure having a circular cross-section and including on both sides of central axis Y x nozzles 12a ⁇ ,12a 2 ..., 12b ⁇ ,12b 2 ..., however, so that as is shown in the figure, the nozzles 12b ⁇ ,12b 2 ... having the smaller cross-sectional flow area are located on the left side above the row of nozzles 12a ⁇ ,12a 2 ... having the larger cross-sectional flow area, and in the figure the order of nozzles is the other way round on the right side of central axis Y l5 that is, the row of nozzles 12b 1; 12b 2 ...
• nozzles 12a 12a 2 ... having the larger cross-sectional flow area are located below the row of nozzles 12a 12a 2 ... having the larger cross-sectional flow area.
• a tum- ing control tube 27 including flow apertures f ⁇ ,f 2 ..., t t ,t 2 ... for the nozzles 12a l5
• Figure 6A shows an embodiment of the invention, wherein the supply air terminal device includes a supply air chamber 11 and on its sides a side plate 10b, whereby between side plate 10b and supply air chamber 11 a flow path 40 is left for the circulated airflow L 2 .
• the device is open at the top and at the bottom and it thus includes flow apertures Ti and T 2 in the top and bottom parts of the device; flow apertures T t for the circulated airflow L 2 and flow apertures T 2 for the combined flow Li + L 2 leaving the device.
• the primary airflow Li is conducted into mixing chamber B ! below flowing path 40.
• the said primary airflow Li induces the circulated airflow L 2 from aperture T x through flow path 40 into mixing chamber B l5 and the combined airflow x + L 2 is conducted sideways from the device guided by side plate 10b and air guiding part 13 ofthe device.
• Figure 6B shows an embodiment, wherein side plate 10b of the device includes an associated turning control damper 30 as the induction ratio Q 2 /Q ⁇ control device 15.
• Control damper 30 is fitted to be turning around pivot point Ni. Control can be perfonned either manually or by a motor by remote opera- tion. By changing the position of control damper 30 the induction ratio between the flows L 2 and Li can be controlled.
• Figure 7A shows an embodiment ofthe invention, which is especially suitable for mounting on a wall J.
• supply air chamber 11 in the same way as in the previous embodiment includes nozzle rows of nozzles
• FIG. 7B shows an embodiment otherwise similar to the one in Figure 7A, except that in this embodiment the control damper 30 functioning as the induction ratio control device 15 is fitted close to the nozzle rows and it turns around pivot point N ⁇
• the control damper 30 functioning as the induction ratio control device 15 is fitted close to the nozzle rows and it turns around pivot point N ⁇
• the induction ratio Q 2 /Q ⁇ can be controlled, that is, that ratio in which flow I- ! induces or draws along the circulated airflow L 2 from room space H.
• Pivot N x is fitted into the side surface of supply air chamber 11. Damper 30 can be turned either manually or by remote control by a motor, preferably by an electric motor.
• Figure 8 A shows an embodiment of the invention, wherein the supply air terminal device includes a supply air chamber 11 and on its both sides on both sides of central axis Y x side plates 10b, whereby between each side plate 10b and supply air chamber 11 a flow path 40 remains for the circulated airflow L 2 ofthe room space or such through the device.
• the device is open both at the top and at the bottom, and it includes flow apertures
• induction ratio control device 15 is possible within the scope of the invention, wherein side plates 10b are fitted to be movable in relation to supply air chamber 11 as shown by arrows M in the figure.
• Figure 8B shows a control damper 30 as the induction ratio control device 15, which damper is fitted to turn around pivot point N l5 whereby pivot point Ni is located in supply air chamber 11 on its side surface.
• Figure 8B also shows such an embodiment with dashed lines, wherein instead of a turning damper 30 the damper can be moved in a linear direction on the side wall of the supply air chamber either manually or by a motor in order to control the induction ratio between flows L 2 and x .
• Figure 9A shows an embodiment of the invention, wherein as shown by the figure supply air terminal device 10 includes a structure open both at the top and on the sides.
• Supply air chamber 11 includes nozzles 12a l5 12a 2 ...; 12b ⁇ , 12b 2 ... located in two rows and as shown in the figure directing supply airflow Li downwards from the device.
• the device includes a lower supply aperture T for the circulated airflow L 2 and a lower discharge aperture T 2 for the combined airflow Li + L 2 .
• the supply airflow Lj conducted from the nozzles will induce a circulated airflow L 2 to flow first into side chamber Bi in between separating plate 33 and side plate 10b and further through the free flow path E x between separating plate 33 and supply air chamber 11 to join supply airflow Li.
• circulated airflow L 2 turns in a direction of close to 180° after joining the supply airflow L x .
• the combined airflow Li + L 2 flows in between separating plates 33 centrally in the device and downwards.
• the induction ratio control device 15 is formed by movable separating plates 33, which are fitted to be movable towards supply air chamber 11 and away from it.
• Arrows M x show the said transfer and the induction ratio control.
• a control damper 30 is located in between separating plate 33 and supply air chamber as the control device 15 for controlling the induction ratio between flows L 2 and L 1 ⁇ which damper 30 is fitted to pivot around pivot point Nj from supply air chamber 11 controlled either manually or by remote control by a motor, e.g. an electric motor.
• a motor e.g. an electric motor.
• the induction ratio Q 2 /Q x between the flows L 2 and x can be controlled.
• an induction ratio Q 2 /Q ⁇ typically in a range of 2-6 is achieved.
• Figures 10A-10J show some advantageous positions of devices according to the invention.
• the devices according to the invention may be located either in the ceiling of the room or at a distance from it close to ceiling K a ofthe room, or devices 10 may be located on a wall or in the floor L a .
• the supply air terminal device 10 is fitted in ceil- ing K a of the room and it is arranged to direct the supply airflow L x + L 2 on both sides of the central axis of the device close to the ceiling.
• the device solutions shown in the embodiments of Figure 1A and Figure 6A are suitable, among others, for the solution shown in Figure 10 A.
• Figure 10B shows an embodiment, wherein flow jets Li + L 2 are directed on both sides of the central axis of the device and obliquely downwards into the room space.
• the device solutions shown in Figures 1A and 9 A are suitable for the embodiment according to Figure 10B.
• Figure 10C shows an embodiment, which blows the supply air jet L x + L 2 on one side of the device only and close to the ceiling.
• the device solutions shown in Figure 1A and in Figure 7 A are suitable for the embodiment according to Figure IOC.
• Figure 10D shows an embodiment of the invention, which blows the supply air jet Li + L 2 directly downward, and the device is fitted at a distance from the ceiling.
• the device solutions of Figure 8 A and Figure 9A are suitable for the embodiment shown in this figure.
• Figure 10E shows an embodiment, wherein the supply air jet is directed on both sides and wherein the device solution is located at a distance from the ceiling.
• the device solutions according to Figure 1A and Figure 6A are suitable for the embodiment shown in this figure.
• Figure 10F shows a floor embodiment, wherein the device is located under the floor and it is arranged to blow the supply air jets in two opposite directions at the floor surface level.
• the device solutions according to Figures 1A, 6A and 7A are suitable for the embodiment shown in this figure.
• Figure 10G shows an embodiment, which blows the supply air jet from the floor directly upwards.
• the device solutions according to Figures 8 A and 9A are especially suitable for the solution according to the embodiment of this figure.
• Figure 10H shows the device in a wall position, and the device blows the supply air jet directly in the normal direction of the wall.
• the device solutions shown in Figures 7A, 8A and 9A are especially suitable for the embodiment of this figure.
• Figure 101 shows a wall embodiment, wherein the device blows obliquely close to the ceiling.
• the device solutions shown in Figures 7A, 8A and 9A are especially suitable for the supply of air shown in this figure.
• Figure 10J shows an embodiment of the invention, wherein the air is directed from the supply air terminal device in a parallel direction with the wall surface and the device is located in a lower part of the wall.
• the device solution according to Figure 7A is especially suitable for the supply of air shown in Figure 10J.

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• Engineering & Computer Science (AREA)
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• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Duct Arrangements (AREA)
• Jet Pumps And Other Pumps (AREA)
• Air-Flow Control Members (AREA)

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• 2000
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• 2001
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