FI122952B - Supply Unit - Google Patents

Description

Supply Unit

Tilluftanordning 5

ENGINEERING

The invention relates to an supply air device according to the preamble of claim 1.

10

BACKGROUND OF THE INVENTION

The supply air devices or air-conditioning beams generally comprise an supply air chamber, a mixing chamber and a heat exchanger. The fresh air flow is introduced from the supply air chamber 15 to the mixing chamber, where the fresh air flow is mixed with the recirculated air, after which the combined air flow is led to the room. The recirculated air is led to the mixing chamber via a heat exchanger where the recirculated air can be heated or cooled. The same supply air unit can be used to cool room air during the summer and to heat the room during the winter. During the summer, the circulating air in the room is cooled and warmed in the supply air heat exchanger during the winter. Fresh air flow induces recirculated air flow from the room through the heat exchanger to the mixing chamber.

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cv FI patent application 20060035 discloses an supply air device and a method for adjusting the airflow rate of 00 o 25. The supply air device comprises an supply air chamber, a heat exchanger o with which the recirculated air flow derived from the room to be ventilated can be either cooled or heated, and a mixing chamber. From the supply air chamber, a fresh air flow is led through nozzles or nozzle slot to a mixing chamber where the supply air (D flow induces recirculated air flow from room to flow through heat exchanger oo 30 to mixing chamber). further comprising a fresh airflow for the flow path, a li-vent opening arranged separately from the nozzles or nozzle slot, and an associated regulator for adjusting the total amount of fresh-air flow supplied from the supply air device to the air-conditioned room. or into the mixing chamber.

FI patents 117682 B, 118236 B disclose supply air devices comprising a supply air chamber, a heat exchanger by which the recirculated air flow 10 from a room to be ventilated can be either cooled or heated, and a mixing chamber. From the supply air chamber, fresh air flow is led through the nozzles or nozzle gap to the mixing chamber where the supply air flow induces recirculated air flow from the room to flow through the heat exchanger to the mixing chamber. In the mixing chamber section, the fresh air flow and the recirculated air flow are combined, after which the combined air flow 15 is led from the outlet of the mixing chamber to a room to be ventilated. These publications disclose various induction rate control systems that can control either the amount of fresh air flow to the mixing chamber or the amount of recirculated air flow from the room to be ventilated to the mixing chamber.

In turn, EN 113798 B discloses a supply air device comprising an supply air chamber and a mixing chamber. From the supply air chamber, fresh air flow c1 through the nozzles or nozzle slot is led to a mixing chamber where the supply air flow induces c3 recirculated air flow from the room to the mixing chamber. Mixing chamber CO .......

o At 25, the fresh air flow and the recirculated air flow are combined, whereupon the combined air flow is led from the outlet of the mixing chamber to the room to be ventilated. Various induction ratio control systems are disclosed which can control either the amount of fresh air flow supplied to the mixing chamber or the amount of recirculated air flow 30 from the room to be ventilated to the mixing chamber.

3

SUMMARY OF THE INVENTION

The supply air device according to the invention is characterized in what is stated in the characterizing part of claim 1.

5

The supply air device of the invention has at least one air flow regulator through which an additional air flow is led from the supply air chamber to at least one suction chamber, from which the fresh air by-pass is directed to at least one mixing chamber.

10 The airflow control regulates the additional airflow to the intake chamber so that the amount of air supplied from the supply air unit to the room to be ventilated can be adjusted within certain limits without having to change the supply air nozzles. The nozzles must be supplied at all times with the minimum amount of air required to induce recirculation air flow and thereby provide sufficient cooling and heating power. The airflow control can increase the total airflow of the supply air device by 1 to 6 times the minimum airflow.

As additional airflow is conducted to the suction chamber, the amount of recirculated airflow from the room to be ventilated to the suction chamber is reduced, but the amount of airflow to the mixing chamber from the suction chamber remains approximately constant. If the temperature of the auxiliary airflow differs from the recirculated airflow temperature of the room to be ventilated, the auxiliary airflow can be used to control the cooling or heating power. The total amount of cm fresh air flow from the supply air unit to the room to be ventilated (fresh air flow from the supply air nozzles to the mixing chamber 00 o 25 + additional airflow from the supply air chamber to the suction chamber and 0 hence the flow pattern. The additional air flow is further regulated evenly distributed through the suction chamber.

4

The solution according to the invention is well suited for use, e.g., in a situation where a constant pressure is maintained on the supply air side by means of a constant pressure regulator.

In a preferred embodiment of the invention, an air-permeable tissue is used in connection with the air flow regulator 5 through which fresh air by-pass is directed to the suction chamber. In this way, the flow rate of the air stream can be drastically lower than the rate of air flow from the nozzles. The lower flow rate of the air stream, in turn, results in a lower sound level. Due to the lower airflow rate, 10 higher pressures in the supply air chamber can be used. Due to the low air flow rate of the auxiliary air, the air distribution characteristics of the supply air device are determined by the nozzle air flow rate and the induction control at the outlet of the mixing chamber, if any.

In another preferred embodiment of the invention, the supply air device also comprises at least one heat exchanger. In such a solution, additional air supplied to the mixing chamber through the suction chamber and the heat exchanger can be post-heated or post-cooled in the heat exchanger. This may be necessary, for example, in a situation where the supply air device is in a conference room where a high supply air flow 20 may cause the conference room to overcool or undercool. By post-heating or post-cooling, the additional air flow through the suction chamber and heat exchanger to the mixing chamber can be adjusted to the temperature of the combined air flow cv in the mixing chamber.

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cp 25 The invention will now be described with reference to some preferred embodiments of the invention shown in Figures 0 of the accompanying drawings, to which, however, the invention is not intended to be solely limited.

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δ BRIEF DESCRIPTION OF THE FIGURES

O) 1 30 5

Figure 1 is a vertical cross-sectional view of one of the supply air devices in which the invention can be applied.

Figure 2 is a vertical cross-sectional view of another supply air device 5 where the invention can be applied.

Figure 3 is an axonometric view of an elongated supply air device in which the invention can be applied.

Figure 4 is an axonometric view of another circular supply air device in which the invention can be applied.

Figure 5 is a vertical cross-sectional view of a third supply air device in which the invention can be applied.

15

Fig. 6 is a vertical cross-sectional view of a fourth supply air device in which the invention can be applied.

Fig. 7 shows an air flow control solution according to the invention.

20

Fig. 8 shows another air flow control solution according to the invention. Figure 9 shows a third air flow control solution according to the invention.

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CM SU.

Fig. 10 shows a fourth air flow control solution according to the invention.

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DESCRIPTION OF THE PREFERRED EMBODIMENTS

05 S 30 6

Figure 1 is a vertical cross-sectional view of one of the supply air devices in which the invention can be applied.

The supply air device 100 comprises a supply air chamber 10 comprising a horizontal ceiling panel 11, below it, a parallel ceiling panel 12 spaced therefrom, a first vertical outer side wall 13a, a second vertical outer side wall 13b, a first vertical inner side wall 14b. The upper edge of the first vertical exterior sidewall 13a abuts the left side edge of the exterior roof panel 11 and the upper edge of the second vertical exterior sidewall 13b joins the right side edge of the exterior roof panel 11. The upper edge of the first vertical inner side wall 14a abuts the left side edge of the ceiling panel 12 and the upper edge of the second vertical inner side wall 14b abuts the right side edge of the ceiling panel 12. The lower edge of the first vertical 15 outer sidewall 13a is connected to the lower edge of the first vertical inner sidewall 14a by the first connecting wall 15a and the lower edge of the second vertical outer sidewall 13b is connected to the lower edge of the second vertical inner sidewall 14b. The supply air chamber 10 thus consists of two separate lower chambers 10b1b, 10b2, which 20 communicate with one another via a single, uniform upper chamber 10a.

The fresh air flow L1 is introduced into the supply air chamber 10 in the horizontal X-X direction associated with the first vertical-side vertical wall 13a of the supply air chamber 10.

° together through 16. The supply air connection 16 can supply the outside wall of the supply air chamber 10-

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o Instead of 25 m 13a, place the outer ceiling in panel 11.

The supply air device 100 further comprises two vertically spaced rectangular heat exchangers 30a, g 30b which are supported at their upper end by the ceiling wall 12 of the supply air chamber 10.

The space between the heat exchangers 30a, 30b forms a suction chamber 40 of rectangular cross-section. The lower part of the suction chamber 40 has a bottom plate 7 50 which rests on the lower end of the heat exchangers 30a, 30b. The central portion 52 of the bottom plate 50 is provided with openings through which recirculated air flow L2 can be led from the room to be ventilated to the suction chamber 40. A first rectangular cross-section 20 is formed between the first heat exchanger 30a and the first vertical inner side wall 14a 5 of the supply air chamber 10. In the space between the second heat exchanger 30b and the second vertical inner side wall 14b of the supply air chamber 10, a second rectangular mixing chamber 20b is formed. The ceiling of the first mixing chamber 20a, i.e. the ceiling panel 10 11 of the supply air chamber 10, has a first row of nozzles 60a through which fresh air flow L1 is led from the supply air chamber 10 to the first mixing chamber 20a. The ceiling of the second mixing chamber 20b, i.e. the ceiling panel 11 of the supply air chamber 10, has a second row of nozzles 60b through which fresh air flow L1 is led from the supply air chamber 10 to the second mixing chamber 20a.

15

At the bottom of the first mixing chamber 20a is formed a first outlet 25a defined by a first connecting wall 15a and a left side edge 51a of the base plate 50. At the bottom of the second mixing chamber 20b, a second outlet opening 25b is formed defined by a second connecting wall 15b and a right side edge 51b of the base plate 50. The lower outlet openings 25a, 25b of the Mo-20 are shaped such that the air flow is directed from the mixing chamber 20a, 20b to the side of the room to be ventilated substantially parallel to the ceiling surface of the room.

CVI

The supply air device 100 further comprises at least one airflow regulator 70 in the ceiling of the suction chamber 40 in the ceiling, i.e. the supply air chamber i 00 cp 25 10, through which additional airflow L3 from the supply air chamber 10 can be supplied to the suction chamber 40.

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g Fresh air flow L1 forms a vacuum in each mixing chamber 20a, 20b, which sucks or induces recirculated air flow L2 from the room to be ventilated to suction -1 · · 30 through chamber 40 and then through heat exchangers 30a, 20b to mixing chambers 20a, 20b. Additional air flow L3 is also absorbed from suction chamber 40 through heat exchangers 30a, 30b to mixing chambers 20a, 20b. In the mixing chambers 20a, 20b, the fresh air flow L1, the auxiliary air flow L3 and the recirculated air flow L2 form a combined air flow LA. The recirculated air flow L2 and the auxiliary air flow L3 can be cooled or heated by heat exchangers 30a, 30b. The combined airflow LA is discharged from the outlet opening 25a, 25b in the lower part of each mixing chamber 20a, 20b into a room to be ventilated to a side substantially parallel to the ceiling surface of the room.

The supply air device 100 is symmetrical with respect to the central vertical axis Y-Y.

10

The supply air device shown in Figures 1 may consist of an elongated body having a substantially rectangular cross-section or a circular body. When the supply air device is circular, the heat exchangers 30a, 30b consist of a single annular heat exchanger, which is circulated by an annular mixing chamber 15 20a, 20b having an annular outlet 25a, 25b at the bottom. Also, the lower part 10b 1, 10b2 of the supply air chamber 10 is an annular chamber and the upper part 10a is a cylindrical chamber. The supply air chamber 13a, 13b of the supply air chamber 10 of the circular supply air device 10 may be cylindrical or e.g. rectangular or polygonal, whereby also the roof panel 11 is arranged in the shape of the outer side wall 20 13a, 13b.

Fig. 2 is a vertical cross-sectional view of another supply air device in which the invention can be applied. This embodiment corresponds to Fig. O

cm 1 of the left side of the embodiment shown, i.e. the Y-Y vertical center axis

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o 25 sections to the left. Thus, in this embodiment, there is only one mixing chamber 20 and only one heat exchanger 30. The suction chamber 40 is delimited by a space between the heat exchanger 30 and the right outer side wall 13c.

g The cross-section of the mixing chamber 20, the heat exchanger 30 and the suction chamber 40 is g substantially rectangular here, o 30

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9

Figure 3 is an axonometric view of an elongated supply air device in which the invention can be applied. The supply air device 100 thus consists of an elongated body having a substantially rectangular cross-section. The supply air chamber ceiling panel 12 has three airflow controllers 70a, 5 70b, 70c through which additional airflow from the supply air chamber to the suction chamber 40 of the heat exchangers 30a, 30b can be conducted. The supply air device may, of course, also be square.

Figure 4 is an axonometric view of a circular supply air device 10 in which the invention can be applied. The supply air device 100 thus consists of a circular body. The supply air chamber ceiling panel 12 has a single air flow regulator 70 through which fresh air flow from the supply air chamber can be conducted to the inner cylindrical suction chamber of the annular heat exchanger.

Figure 5 is a vertical cross-sectional view of a third supply air device in which the invention can be applied. The intake air chamber 10 has a cross section consisting of an upper rectangular portion and a lower triangular portion below. Below the supply air chamber 10 is a horizontal bottom plate 50 having obliquely upwardly folded edge portions 51a, 51b.

The supply air device further comprises side walls 14a, 14b, the upper edges of which coincide with the lower corners of the rectangular upper part of the supply air chamber 10 and which are inclined downwardly. The first side wall 14a and the first edge portion 51a of the bottom plate form between them a first mixing chamber 20a. A second side wall 14b and a second edge portion 51b of the base plate form between them

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25 second mixing chamber 20b. The triangular bottom portion of the supply air chamber 10 has an airflow regulator 70a, 70b on each side through which an additional airflow L3 is led from the supply air chamber 10 to the suction chamber 40, from which additional airflow g L3 is absorbed by the recirculating airflow L2.

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A first adjusting plate 200a is mounted in connection with the first edge portion 51a of the base plate 51 for adjusting the induction ratio of the first mixing chamber 20a. Connected to the second peripheral portion 51b of the base plate 51 is a second adjusting plate 200b for adjusting the induction ratio of the second mixing chamber 20b. The fresh air currents L1 discharged from the nozzles 60a, 60b are directed to the mixing chambers 20a, 20b and induce the recirculated air flow L2 to flow through the openings of the central portion 52 of the base plate 50 into the suction chamber 40 and further into the mixing chambers 20a, 20b. By raising and lowering the control plates 200a, 200b, the amount of recirculated air flow L2 from the suction chamber 40 to the mixing chambers 20a, 20b can be adjusted, whereby the induction ratio changes.

Fig. 6 is a vertical cross-sectional view of a fourth supply air unit in which the invention can be applied. The intake air chamber 10 has a cross section consisting of an upper rectangular portion and a lower triangular portion below. The sidewalls 51a, 51b are inclined downwardly on the side walls of the triangular portion below the supply air chamber 10. The supply air device further comprises outer side walls 14a, 14b, which consist of upper vertical portions 14a1, 14b1 and obliquely downwardly directed portions 14a2, 14b2. A first suction chamber 40a is formed between the vertical portion 14al of the first outer side wall 14a and the first side wall of the rectangular upper portion of the supply air chamber 10a. Between the vertical portion 14bl of the second outer side wall 14b and the second side wall of the rectangular upper portion of the supply air chamber 10, a second suction chamber 40b is formed. The oblique portion 14a2 of the first outer side wall 14a and the first sieve side wall 51a form a first mixing chamber 20a. Repeat the oblique portion 14b2 of its outer sidewall 14b and the second inner sidewall 51b to form

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The cp 25 interconnects a second mixing chamber 20b. The side walls of the upper portion of the supply air chamber 10 have an airflow regulator 70a, 70b through which g is directed from the supply air chamber 10 to an additional airflow L3 to the suction chambers 40a, 40b, from which the additional airflow L3 is absorbed by the

01 'I 30 11

Along with the vertical portion 14al of the first outer side wall 14a is provided a first adjusting plate 200a for adjusting the induction ratio of the first mixing chamber 20a. In connection with the vertical portion 14b 1 of the second outer side wall 14b, a second adjusting plate 200b is provided for adjusting the induction ratio of the second mixing chamber 5b. Fresh air currents L1 discharge from nozzles 60a, 60b

are directed to mixing chambers 20a, 20b and induce recirculated air flow L2 to flow into suction chambers 40a, 40b and thereafter into mixing chambers 20a, 20b. By rotating the adjusting plates 200a, 200b, the amount of recirculated air flow L2 from the suction chambers 40a, 40b to the mixing chambers 20a, 20b can be adjusted to change the induction ratio of 10 to 10.

Fig. 7 shows an air flow control solution according to the invention. The top of the page shows a cross-section of the airflow regulator and the bottom of the page shows the airflow regulator seen from below. The air flow regulator here is based on a 15-valve valve comprising a base member 71 supported on the edges of the opening 12a in the ceiling 12. The bottom portion 71 may consist, for example, of a collar disposed at the edges of the opening 12a of the ceiling panel 12 and a cross section having a helical hole 72 in the center thereof, thereby opening into the opening 12a of the ceiling panel 12, limited only by the cross member. Disc valve comprising 20 further adjustment plate 73 which is supported via a threaded pin 74 to the center of the base portion 71 of the threaded hole 72. Ilmavirtaussäätimestä discharged air volume can be adjusted by adjusting the adjustment plate 73 the distance from the bottom part 71 revolutions c \ i tämällä adjustment plate 73 of the arrow SI in the illustration. In addition, an air permeable fabric 75 is provided on the outer c3 of the adjusting plate 73, which extends between the portion 73 of the plate 73 and the ceiling panel 12. The air permeable fabric 75 may consist of, e.g., a gauze. The upper end of the air permeable fabric 75 must be supported on the ceiling of the ceiling 12 or the base portion 71 such that the air-permeable fabric 75 can rotate with the adjusting disc 73 when the disc valve is opened or closed by turning the adjusting disc 73.

The auxiliary air flow L3 is led from the supply air chamber 10 through the inner ceiling 30 of the supply air chamber 10 through the opening 12a of the slide plate 12 and the opening 71 of the bottom of the valve valve 12 and further through the air permeable fabric 75 to the suction chamber 40.

Fig. 8 shows another air flow control solution according to the invention.

5 At the top of the page is a cross-section of the airflow regulator and at the bottom of the page is the airflow regulator seen from below. The air flow regulator 80 comprises a base member 81 which is supported at the edges of the opening 12a in the ceiling panel 12 and has a portion comprising sector-like openings. The base portion 81 may consist, for example, of a collar disposed at the edges of the opening 12a of the ceiling panel 12 and a central portion having secular openings 82 having a helical hole 82 in the interior thereof thereby forming sectorial openings in the opening 12a of the ceiling panel 12. The air flow regulator 80 further comprises a control plate 83 having sector-shaped openings 83a. The control plate 83 is supported by means of a threaded bolt 84 in the center of the base portion 81 of the threaded hole 82. The air 15 flow controller 80 discharged amount of air can be adjusted by rotating the säätöle-vyä 83 of the arrow SI, as shown in, thereby adjusting the base portion 81 of tapered apertures 81a and the control board 83 tapered apertures 83a the magnitude of the overlap. In addition, an air-permeable fabric 85, which is preferably a gauze, may be mounted between the bottom panel 81 and the lower surface of the ceiling panel 12. The additional air flow L3 is led from the 20 supply air chambers 10 through the opening 12a of the ceiling panel 12 of the supply air chamber 10 and through the air permeable fabric 85 to the air flow regulator 80, through which openings 81a, 83a are discharged into the suction chamber c1.

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Figure 9 shows a third air flow control solution according to the invention. The top of the page shows a cross-section of the air flow regulator and the bottom of the page g shows the air flow regulator seen from below. The air flow regulator 90 LO comprises a base member 91 which is supported at the edges of the opening 12a in the ceiling panel 12. The base portion 91 may consist, for example, of a collar which is positioned at the edges of the opening 12a of the ceiling panel o 30 12. An opening opening in the opening 12a of the ceiling panel 12 is thus formed inside the collar. The air flow regulator 90 further comprises a bottom cylinder 13 91b, the inner end of which is supported on the bottom part 91 and the outer end of which is closed by the first cover plate 91c. The air flow regulator 90 further comprises an adjusting cylinder 93 disposed on the outer surface of the shell of the bottom cylinder 91b, the outer end of which is closed by a second cover plate 93c. The bottom of the cylinder 91b of the housing of the first five holes 91a and the external adjustment cylinder 93 of the housing has second openings 93a Weather-lift cylinders 93 rotates in the bottom of the cylinder 91b of the outer surface of the arrow SI, as shown in, which can be adjusted by adjusting cylinder 93 the openings 93a and the bottom cylinder 91b of the openings 91a overlap namely how much the air flow ilmavirtaussää passes through time 90. Through the base plate 93a of the adjusting cylinder 93, a threaded bolt 10 94 extends into the threaded hole 92 of the bottom plate 91b of the base plate 91b. The threaded bolt 94 can lock the adjusting cylinder 93 into the base cylinder 91b at a desired position. Further, an air-permeable fabric 95, which is preferably a gauze, may be provided on the inner surface of the shell of the bottom cylinder 91b. Auxiliary air flow L3 is led from the supply air chamber 10 through the ceiling of the supply air chamber 10 through the opening 120a of the plate 12 into the inner cylinder 91b of the inner 15 and thereafter through the air permeable fabric 95, the openings 91a of the base cylinder 91b and the openings 93a.

Figure 10 shows a fourth air flow control solution according to the invention. In this embodiment, the airflow regulator 100 comprises an actuator 110 which controls a closing member 115, which is preferably a valve disc. The actuator 110 is secured by a clamp 105 to the ceiling panel 12 of the supply air device, i.e. the ceiling panel of the suction chamber 40. The closing member 105 closes and opens the opening cm 12a in the ceiling panel 12. The actuator 110 may be, for example, a stepper motor controlled by a control unit 120 located in the room to be ventilated. The additional unit airflow L3 of the supply air device may be infinitely controlled from the control unit 120 located in the room to be ventilated. Fig. 10 does not show the tissue in connection with the air flow regulator 100, but of course the air flow regulator 100 can be fitted with, for example, the tissue solution 75 shown in the embodiment of Fig. 7cd.

14

In the embodiment shown in Figs. 1, the suction chamber 10 has a uniform upper portion 10a and an external portion 10a, 10b2 of the mixing chambers 20a, 20b. In the case of both a rectangular and a circular supply air device, the supply air chamber 10 may also consist solely of a uniform upper portion 510a. The inner side walls 14a, 14b of the supply air chamber 10 then extend to the outer roof plate Ila and form the outer side walls of the supply air device. The supply air connection 16 may be located on the outer side wall 14a, 14b of the supply air chamber 10 or on the outer ceiling panel 11.

10 In the embodiment shown in Figs. 2, the suction chamber 10 has an integral upper portion 10a and an external portion 10b of the mixing chamber 20. The supply air chamber 10 may also consist only of a continuous upper portion 10a. The inner side wall 14a of the supply air chamber 10 then extends to the outer ceiling panel 11 and forms the outer side wall of the supply air device. The supply air connection 16 may be located 15 on the outer side wall 14a of the supply air chamber 10 or on the outer ceiling panel 11.

The embodiment shown in Figure 3 has three airflow controls 70a, 70b, 70c and Figure 4 has one airflow controller 70. The number of airflow controls is determined by the amount of fresh air required. The inlet air device according to the invention has at least one air flow regulator.

In the embodiments shown in the figures, the fresh air flow L1 is supplied from the supply air chamber 10 through nozzles 60, 60a, 60b to mixing chambers 20, 20a, 20b.

The nozzles 60, 60a, 60b may be replaced by a nozzle slot through which fresh air flow i 00 o 25 L1 is led from the supply air chamber 10 to the mixing chambers 20, 20a, 20b.

g. 0 g. Only some preferred embodiments of the invention are described above, and it will be apparent to those skilled in the art that they may be subject to numerous modifications within the scope of the appended claims cd.

Claims (9)

A supply air device (100) comprising: - a supply air chamber (10), 5 - at least one mixing chamber (20, 20a, 20b), - at least one suction chamber (40, 40a, 40b), - nozzles (60, 60a, 60b) or a nozzle gap through which a fish-air flow (LI) is conducted from the supply air chamber (10) to said at least one mixing chamber (20, 20a, 20b), which fresh-air flow (LI) induces a circulating air flow (L2) to flow to be ventilated via said at least one suction chamber (40, 40a, 40b) to said at least one mixing chamber (20, 20a, 20b), - at least one outlet port (25, 25a, 25b) through which one of said mixing at least one mixing chamber (20) , 20a, 20b) of the fresh air flow (LI) and the circulating air flow (L2) formed combined air flow (LA) is conducted to the room to be ventilated, characterized in that the ventilation device further comprises: - at least one air flow control (70, 70a, 70b, 70c, 80, 90), located in a wall between the supply air chamber (10) and said at least one suction chamber (40, 40a, 40b), through which air flow control (70, 70a, 70b, 70c, 80, 90) provides an additional air flow ( L3) is fed from the supply air chamber (10) to said at least one suction chamber (40, 40a, 40b), from which the additional air flow (L3) is suctioned together with the circulating air flow (L2) to said at least one cm mixing chamber (20, 20a, 20b). o 25 GO Supply air device (100) according to claim 1, characterized in that the supply air device (100) further comprises: at least one heat exchanger (30, 30a, 30b) having an input side and an opposite outlet side, o wherein said at least one mixing chamber (20, 20a, 20b) is formed in connection with the output side of said at least one heat exchanger (30, 30a, 30b) and said at least one suction chamber (40, 40a, 40b) is formed in connection with the input side of said at least one heat exchanger (30, 30a, 30b), the circulating air flow (L2) and the additional air flow (L3) passing from said at least one suction chamber (40, 40a, 40b) through said at least 5 one heat exchanger (30, 30). input side to said at least one mixing chamber (20, 20a, 20b) on its output side. Supply air device (100) according to claim 1 or 2, characterized in that the supply air device (100) comprises: 10. a horizontal straight roof plate (12), - two elongated, spaced-apart parallel heat exchangers (30a, 30b), the upper ends of which are supported on the lower surface of the inner roof plate (12), - an elongated suction chamber (40) formed in the space between the heat exchangers (30a, 30b), on the entrance side thereof, 15. an elongate mixing chamber (20a, 20b) on the outer side or on the exit side of each heat exchanger (30a, 30b), - a supply air chamber (10) comprising elongated lower portions (10b 1, 10b2) on the outer side of the mixing chambers (20a, 20b) and a continuous upper portion (10a) joining the lower portions (10b 1, 10b2) and formed in a space between the horizontal straight roof panel (12) and a parallel outer roof panel (11) spaced therefrom; 60), which are located in the ceiling of the mixing chamber ama (20a, 20b) or c \ in the inner roof plate (12) and a fresh air flow (LI) is passed through these from and supply air chamber (10) to the mixing chambers (20a, 20b), a bottom plate (50) which supports located at the lower end of the heat exchangers (30a, 30b) and having openings in its central portion, through which a circulating air flow (L2) is conducted from the space to be vented to the suction chamber (40), g - an outlet opening (25a 25b) located in the lower part of each mixing chamber (20a, 20b), which opening is limited by the bottom surfaces (15a, 15b) of the bottom members (10b 1, 10b2) of the supply air chamber (10) and the the outer edges of the bottom plate (50), - at least one air flow control (70, 80, 90), located in the ceiling of the suction chamber (40) or in the inner roof plate (12) and through which an additional air flow (L3) is conducted from the supply air chamber (10) to the suction chamber (40), from which the additional air flow (L3) is sucked through the the heat exchangers (30a, 30b) into the mixing chambers (20a, 20b). Supply air device (100) according to claim 1 or 2, characterized in that the supply air device (100) comprises: - a horizontal internal roof plate (12), 10. an elongated heat exchanger (30), the upper end of which is supported on the lower surface of the the inner roof plate (12), - an elongated suction chamber (40) formed in the space between the heat exchanger (30) and a vertical outer side wall (13c), on the entrance side of the heat exchanger (30), - an elongated mixing chamber (20) is located on the output side of the heat exchanger (30), - a supply air chamber (10) comprising an elongated lower portion (10b) on the outer side of the mixing chamber (20) and an upper portion (10a) formed in a space between the horizontal straight roof panel (12) and a horizontal straight roof panel (11), nozzles (60) located in the ceiling of the mixing chamber (20) or in the inner roof panel (12) and a fine-shift flow (LI) these from the supply air chamber (10) to the mixing chamber (20), - a bottom plate (50) which rests on the lower end of the heat exchanger (30) c and on the lower canyon of the vertical outer side wall (13c) and which has cm openings in its middle portion, through which a circulating air flow (L2) is led from the room to be ventilated to the suction chamber (40); - an outlet opening (25) located in the lower part of the mixing chamber (20), which opening is restricted by the bottom surface (15) of the the lower part (10b) of the supply air chamber (10) and the outer canyon of the bottom plate (50), or at least one air flow control (70, 80, 90) located in the ceiling of the suction chamber (40) or in the inner roof plate (12) and through which an auxiliary air flow (L3) is conducted from the supply air chamber (10) to the suction chamber (40), from which the auxiliary air flow (L3) is sucked through the heat exchanger (30) to the mixing chamber (20). Supply air device (100) according to claim 1 or 2, characterized in that the supply air device (100) comprises: - a horizontal circular inner roof plate (12), - an annular heat exchanger (30), the upper end of which is supported on the lower surface - an annular suction chamber (40) formed within the annular heat exchanger (30) or on the input side of the annular heat exchanger (30), - an annular mixing chamber (20) located outside or on the exit side of the annular heat exchanger (30), - a supply air chamber (10) comprising a lower portion (10b) on the outer side of the annular mixing chamber (20) and a continuous upper portion (10a) which is Associated with the lower annular portion (10b) formed in a space between the horizontal inner roof plate (12) and a horizontal outer roof plate (11), - nozzles (60) located in the ceiling of the annular mixing chamber (20) or in the inner roof plate an (12) and a fresh-shaft flow (LI) is passed through these from the supply air chamber (10) to the mixing chamber (20), 20. a bottom plate (50) which rests on the lower end of the annular heat exchanger (30) and openings in its central portion, through which a circulating air flow (L2) is conducted from the room to be ventilated to the suction chamber (M (40), cv - an annular outlet opening (25) located in the lower part of the annular CO cp mixing chamber) (20), which opening is restricted by the bottom surface (15) of the lower annular portion (10b) of the supply air chamber (10) and the outer edge of the g bottom plate (50), g - at least one air flow control (70, 80, 90), located in the ceiling of the suction chamber (40) or in the inner roof plate (12) and through which an additional air flow (L3) is conducted from the supply air chamber (10) to the suction chamber (40), from which the additional air flow (L3) ) is drawn through the heat exchanger (30) to the mixing chamber (20). Supply air device (100) according to any of claims 1-5, characterized in that said at least one air flow control (70) is formed by a plate valve comprising: - a bottom part (71) supported at the edges of an opening ( 12a) in the ceiling (12) of the suction chamber (40), - a control plate (73), 10. a threaded pin (74), by means of which the control plate (73) is pivotally supported in a threaded shark (72) in the middle of the bottom part (71), wherein the amount of air flowing from the air flow control (70) can be controlled by controlling the distance from the control plate (73) to the bottom portion (71) by rotating the control plate (73). 15 Supply air device (100) according to any of claims 1-5, characterized in that said at least one air flow control (80) is formed by a sector gap valve, comprising: - a bottom part (81) supported at the edges of an opening (12a) in the ceiling (12) of the suction chamber (40) and having a portion comprising sector-shaped openings (81a), - a control plate (83) exhibiting sector-shaped openings (83a), c - a threaded bolt (84) extending through a heel of the control plate (83) and inserted c3 into a threaded heel (82) in the middle of the bottom portion (81), whereby the amount of air flowing from the air flow control (80) can be controlled o by regulation. of the size of the overlap of the sectoral openings | (81a) in the bottom portion (81) and the sectoral openings (83a) of the control plate g (83) by rotating the control plate (83). CD σ> o o (M Supply air device (100) as claimed in claims 1-5, characterized in that said at least one staple flow control (90) is formed by a sectorally openable cylinder, comprising: - a bottom part (91) supported at the edges of a opening (12a) in the roof (12) of the suction chamber (40), - a bottom cylinder (91b), the inner end of which is supported on the bottom plate (91), the outer end of which is closed with a first lid disc (91c) and the bottom cylinder ( 91b) sheath has first openings (91a), - a control cylinder (93) located on the outer surface of the bottom of the bottom cylinder (91b), the outer end of the cylinder being closed by a second cap (93c) and whose sheath has other openings (93a), - a threaded bolt (94) extending through a shark in the locking disc (93c) of the control cylinder (93) and inserted into a threaded shark (92) of the bottom cylinder (91b) cap (91c), wherein The amount of air flowing from the air flow control (90) can be controlled g by controlling the magnitude of the overlap between the openings (93a) in the control cylinder (93) and the openings (91a) in the bottom cylinder (91b) by rotating the control cylinder (93). Supply air device (100) according to any of claims 6-8, characterized in that the air flow control (70, 80, 90) further comprises a permeable woven (75, 85, 95), through which the by-pass flow (L3) of fresh air headed. C \ J δ CM cb o oo o X cc CL LO 05 δ 05 o o CM