GB2391613A

GB2391613A - Air terminal device

Info

Publication number: GB2391613A
Application number: GB0314848A
Authority: GB
Inventors: Heimo Ulmanen; Reijo Villikka; Maija Virta; Kari Aikas
Original assignee: Halton Oy
Current assignee: Halton Oy
Priority date: 2002-06-28
Filing date: 2003-06-25
Publication date: 2004-02-11
Anticipated expiration: 2023-06-25
Also published as: SE526565C2; DE10328615A1; FI20021277A; FI20021277A0; SE0301826L; SE0301826D0; FR2841636A1; GB0314848D0; FR2841636B1; FI119127B; GB2391613B; DE10328615B4

Abstract

A supply air terminal device comprises a supply air chamber (11) into which air is passed from a supply air duct. The supply air chamber (11) comprises nozzles (12a1, 12a2...) on both sides of a vertical axis (Y) for passing an air flow (L1) into a mixing chamber (F). The supply air terminal device comprises a bottom plate (13) which closes the device from below and which can be used as a mounting plate for a light fitting (15, Fig 2). A heat exchanger (14) is located on the bottom plate (13) for heating or cooling circulated air, so that a circulated air flow (L2) from a room space is passed to the heat exchanger (14) horizontally and into connection with the supply air flow (L1) passed from the nozzles (12a1, 12a2...). The circulated air flow (L2) changes its direction through about 180{ and a combined air flow (L1 + L2) flows from the mixing chamber (F) in a direction opposite to the direction in which the circulated air flow (L2) comes to the heat exchanger (14). A plate (T) can be placed on the heat exchanger (14) to help create the air flow (L2). The nozzles (12) may be located on only one side of the supply air chamber (11). The heat exchanger (14) may be disposed below the air supply chamber (11).

Description

Supply air terminal device The invention relates to a supply air terminal

device.

From the prior art supply air terminal devices are known which are intended for

the ceiling of a room space and in which air is introduced from an air conditioning duct into an elongated supply air chamber and distributed advantageously through nozzles on the side of the supply air chamber into a mixing chamber and out of 10 the device. Said supply air flow passed from the nozzles induces a circulated air flow to flow through a heat exchanger and further into connection with fresh supply air passed from the nozzles of said supply air chamber.

This application discloses a novel inventive device arrangement of the above-

1 S mentioned type, which device arrangement comprises a bottom plate which closes the device from below and prevents the circulated air flow of a room from coming directly from below into connection with heat exchangers. Thus, in the arrangement in accordance with the invention, the circulated air flow comes into connection with the heat exchangers from the side and a fresh air flow passed 20 from nozzles induces said circulated air flow of the room and turns its direction through about 180 and a combined air flow is passed away from the side of the device. In the arrangement in accordance with the invention, the bottom plate under the device serves not only as a plate blocking air flow but also as a mounting plate on which it is possible to mount, for example, light fittings. The 25 arrangement in accordance with the invention is modular, enabling to provide a device arrangement that comprises a mere bottom plate without a light fitting and a bottom plate comprising a light fitting, for example, elongated fluorescent strip lights extending parallel to the supply air chamber.

30 The supply air terminal device according to the invention is characterized by what is stated in the claims.

In the following, the invention will be described with reference to some advantageous embodiments of the invention shown in the figures of the appended drawings, but the invention is not meant to be exclusively limited to these S embodiments. Figure I shows a first advantageous embodiment of the supply air terminal device in accordance with the invention as mounted on the ceiling of a room. The structure shown in the figure is an axonometric partial view in which an end plate 10 J of the device has been cut open to show the parts inside the structure.

Figure 2 shows a second embodiment of the device in accordance with the invention comprising a bottom plate that includes a light fitting. The structure shown in the figure is an axonometric partial view in which an end plate J of the 15 device has been cut open to show the parts inside the structure.

Figure 3 shows a third advantageous embodiment of the invention in which supply air is blown from the device only in one direction. The structure shown in the figure is an axonometric partial view in which an end plate J of the device has 20 been cut open to show the parts inside the structure.

Figure 4 shows an embodiment of the invention comprising one heat exchanger in connection with a bottom plate. The embodiment is suitable for being mounted both on a ceiling and on a wall. The structure shown in the figure is an 25 axonometric partial view in which an end plate J of the device has been cut open to show the parts inside the structure.

In Fig. I and in the other figures, an end plate J has been removed and the structure is shown as cut open to illustrate the parts inside the device. In the 30 embodiments of Figs. 1, 2, 3 and 4, as shown in Fig. 1, a separation plate T can be placed on a heat exchanger 14 over a portion of the width of the heat exchanger

( 3 14, the separation plate T enabling a circulated air flow L2 to be passed close to the location where air L' discharging from nozzles 1 2a', 1 2a2... enters a chamber F. For example, in the embodiment of Fig. I as well as in the other embodiments, the heat exchanger 14 is open at its front surface 14a towards a room space H. The 5 plate T extends only over a portion of the upper surface of the heat exchanger 14, so that the flow L2 is passed along the heat surfaces of the heat exchanger to the adjacency of a supply air chamber 11, at which it is directed upwards into a mixing chamber F. Thus, the plate T serves as a separation wall. In that connection, the plate structure is additionally used for separating the inlet side of 10 the circulated air and the outlet sides of a combined flow Lit + L2 from one another. In the figures, the plate T is shown in a partial view.

Fig. I is an axonometric view of a supply air terminal in accordance with the invention when it has been mounted on a ceiling K of the room H or equivalent.

IS The illustration is an axonometric partial view. The supply air terminal device 10 comprises a supply air chamber 11, which is an elongated chamber structure into which air is passed from a supply air duct. Advantageously, fresh air is passed into a space E inside the supply air chamber 11 and passed therefrom through the nozzles 12a, 12a2, 123... to both sides of the centre axis of the device, while the 20 nozzles 12a', 12a2 are located on both sides of the vertical centre axis Y over the length of the elongated supply air chamber 11. The structure of the invention shown in Fig. I is symmetrical with respect to the vertical axis Y. In the embodiment of the figure, the nozzles 12a', 12a'... are located in the supply air chamber 11 on both sides of the centre axis Y and an air jet L' comes through 25 them to the two sides of the supply air terminal device 10.

In accordance with the invention, the device comprises a bottom plate 13 that closes the device from below. A heat exchanger 14 is placed on the bottom plate on both sides of the centre axis Y for cooling or heating the circulated air L2 of the 30 room H. In the figures, heat transfer medium tubes of the heat exchangers 14 are denoted with Us, U2...

( 4 The circulated air L2 comes into connection with the heat exchanger 14, located on the bottom plate 13, from the side as shown by the arrow L2, and said air L2 is circulated through the heat exchanger 14 further into connection with the supply 5 air L' passed from the nozzles 12a, 12a2... and as induced by it. The function of the bottom plate 13 is to serve as a mounting plate, for example, for a light fitting 15 and to close the device from below. Thus, according to the intended use of the device, the device can be used like a module such that different accessories, such as a light fitting IS, can be fitted in connection with the bottom plate 13, the lo bottom plate 13 thus functioning as a mounting plate and as an air-flow blocking plate which prevents the circulated air flow L2 from coming directly from below.

In other words, the bottom plate 13 also serves as a fixing surface for accessories.

The circulated air now L2 from the room space H thus changes its direction through about 180 upon meeting in the mixing chamber F the supply air flow L' I S passed from the nozzles 1 2a', 12a2... The combined air flow Lit + L2 is passed out of the device sideways parallel to the false ceiling K in a direction opposite to that of the circulated air flow L2 of the room H coming to the heat exchanger 14.

Advantageously, as shown in the figure, the supply air chamber 11 extends to the bottom plate 13 or to the adjacency thereof, so that it divides the device into two 20 air flow areas D' and D2 on both sides of the vertical centre axis Y. A top plate I lb of the device functions as a top plate of the supply air chamber I I and as a plate structure that defines the mixing chamber F from above. The function of the top plate I lb is the same in all the embodiments illustrated.

In all the embodiments described, for example, a rectangular material plate 13 covers the device throughout from below and functions as the lower surface of the device. 30 Fig. 2 shows a light fitting 15 on the lower surface of a bottom plate 13. The light fitting 15 comprises a fluorescent strip light 15a' placed parallel to a supply air

s chamber 1 1. The light fitting 15 is disposed in a recess 130 of the bottom plate 13, the recess 130 being formed, for example, by pressing it into the bottom plate material. In other respects, the embodiment of the supply air terminal device 10 shown in Fig. 2 corresponds to the embodiment of Fig. 1. The device is mounted 5 onaceilingKofaroomH.; Fig. 3 shows an embodiment of the supply air terminal 10 in accordance with the invention in which a supply air chamber 11 comprises only one heat exchanger 14 on one side of the supply air chamber 11. In this embodiment, too, a bottom plate 10 13 prevents a circulated air flow from coming directly from below into connection with the heat exchanger 14. As shown in Fig. 3, the circulated air flow L2 comes into connection with the heat exchanger 14, as in the embodiment of Figs. I and 2, from the side. A supply air flow L' from nozzles 12a', 12a2 induces the I circulated air flow L2 to flow through the heat exchanger 14 into connection with 15 the supply air flow L' and the combined air flow Lo + L2 is caused to flow sideways out of the device advantageously such that the direction of the supply air flow L2 into the device and the direction of the exhaust air flow Lo + L2 from the device are opposite to each other. Thus, the circulated air flow L2 changes its direction in the mixing chamber through about 180 . The flow Lo + L2 exits from 20 the device from above the circulated air flow L2 coming into it. As shown in Fig. 3, a ceiling K is located in the adjacency of a top plate 11b of the supply air chamber 11 and the device is attached to the ceiling K by the top plate I 1 b or by an attachment connected thereto.

25 The devices shown in Figs. 1, 2 and 3 function specifically as horizontally mounted as illustrated. In the embodiments of Figs. 1, 2 and 3 and in the ceiling mounting shown in Fig. 4, the circulated air flow L' comes horizontally into connection with the device and the combined flow Lit + L2 or L' + L2 + L'2 exits from the mixing chamber F horizontally from above.

Fig. 4 shows an embodiment of the supply air terminal 10 in accordance with the invention in which there is also one heat exchanger 14. The heat exchanger is located on the entire bottom plate 13 across the width of the bottom plate 13. As shown in Fig. 4, the device is mounted on a ceiling K of a room H. A first l 5 circulated air flow L2 comes from the room space H or equivalent into connection with the heat exchanger 14 and said air flow L2 comes, as induced by a supply air flow L' passed from nozzles 12a', 12a2, into connection with the supply air i flow Lo, and a combined air flow is passed sideways out of the device. The circulated air flow L2 changes its direction through about 180 in a mixing 10 chamber F with respect to its direction of entering the heat exchanger 14. In addition, in this embodiment, a second circulated room air flow L'2 is passed through the heat exchanger 14 into the mixing chamber F. as shown in Fig. 4. Said second circulated air flow L'2 is passed to the heat exchanger 14 through a front surface 14a of one side. Thus, in this embodiment, too, there is at least one l 15 circulated air flow L2 that is passed to the mixing chamber F such that it changes its direction there substantially through 180 such that the direction of a combined air flow L' + L2 + L'2 exiting from the device is substantially opposite to the direction in which said first circulated room air flow L2 comes to the heat exchanger 14. In this embodiment, too, said first circulated air flow L2 comes, as 20 shown in Fig. 4, horizontally to the heat exchanger 14 and the combined flow, L' + L2 + L'2 also exits from the device from above the heat exchanger horizontally in the illustration of Fig. 4.

The supply air terminal shown in Fig. 4 can also be used as a wall device on the 25 wall of the room H. in which case the combined flow L' + L2 + L'2 is arranged so that it can be directed from the device directly upwards or downwards along the l surface of the wall.

Claims

( 7 Claims

1. A supply air terminal device (10), which supply air terminal device comprises a supply air chamber (I 1) into which air is passed from a supply air duct and which 5 supply air chamber (11) comprises nozzles (12a', 12a2) from which a supply air flow (L') is passed into a mixing chamber (F), and which supply air terminal device (10) comprises a heat exchanger (14) for heating or cooling circulated air characterized in that a circulated air flow (L2) from a room space (El) is passed to the heat exchanger (14) and further into connection with the supply air flow (L') 10 passed from the nozzles (12a', 12a2) and as induced by it, whereby the circulated air flow (L2) changes its direction through about 180 and a combined air flow (L, + L2) flows from the mixing chamber (F) in a direction opposite to the direction in which the circulated air flow (L2) coming to the device enters the heat exchanger (14), and that there is a bottom plate (13) which closes the device from 15 below, and that the heat exchanger (14) is located on the bottom plate (13) and that the front surface (14a) of the heat exchanger (14) opens into the room space (H), so that the circulated air flow (L2) comes directly to the heat exchanger (14) from the side from the room space (H) and the bottom plate (13) prevents the circulated air flow (L2) from entering the heat exchanger (14) from below.

2. A supply air terminal device as claimed in claim 1, characterized in that the supply air terminal device is disposed on a ceiling (K) of a room (H) or equivalent and that the circulated air flow (L2) of the room (H) comes to the heat exchanger (14) horizontally and that the combined air flow of the supply air flow passed 25 from the nozzles (12a, 12a2) and the circulated air flow is passed from the mixing chamber (F) also horizontally out of connection with the device.

3. A supply air terminal device as claimed in claim I or 2, characterized in that there are two heat exchangers (14) on the outer sides of the vertical centre axis 30 (Y) of the device and that the supply air chamber (11) comprises nozzles (12a', 12a2...) on both sides of the vertical centre axis (Y).

4. A supply air terminal device as claimed in any one of the preceding claims, characterized in that the supply air chamber (11) divides the supply air terminal device at the vertical centre axis (Y) into two air circulation parts (D', D2) which 5 are separate from each other, while the supply air chamber (11) extends to the bottom plate (13) or to the adjacency thereof.

5. A supply air terminal device as claimed in claim 1 or 2, characterized in that there is only one heat exchanger (14) above the bottom plate (13), so that there is 10 an air flow only in one direction over the heat exchanger (14) from the nozzles ( I 2a', 1 2a2) of the supply air chamber, said supply air flow passed in one direction from the nozzles (12a,, 12a2...) inducing the circulated air flow (L2) to flow through the heat exchanger (14) on the bottom plate (13) such that the circulated air flow (L2) from the room (H) or equivalent to the heat exchanger (14) changes 15 its direction substantially through 180 in connection with the device and the combined air flow (L' + L2) is passed out of connection with the supply air terminal device in a direction opposite to the direction in which the circulated air flow (L2) comes to the device, and that in the device structure the supply air chamber extends substantially to the bottom plate (13).

6. A supply air terminal device as claimed in claim I or 2, characterized in that the supply air chamber (I l) extends to the heat exchanger (14) which is placed over the entire width of the bottom plate (13) and which is placed on the bottom plate (13), and that from the nozzles (12a, 12a2.. .) of the supply air chamber 25 there is a supply air flow (L') in one direction out of connection with the device to the mixing chamber (F), a first circulated air flow (I,2) being passed to said mixing chamber from the room space (H) and changing its direction substantially through 180 in the mixing chamber (F), and that there is a second circulated air flow (L'2) which is passed, induced by the supply air flow (L,), from one side of 30 the device through said same heat exchanger (14) to the mixing chamber (F), so that a combined air flow (L' + Lz + L'2) exits from the device.

7. A supply air terminal device as claimed in any one of the preceding claims, characterized in that the bottom plate (13) comprises a light fitting (15) on its lower surface.