Arrangement for ventilating a room, in particular a laboratory room

Abstract

An arrangement for ventilating a room contains a supply air duct arranged above an aisle region for delivering air into a room and, arranged above the supply air duct, an exhaust air duct for discharging exhaust air. The supply air duct contains two lateral air delivery portions which extend along the aisle region and each contain air outlet openings from which the supply air exits laterally. A substantially airtight central separating portion separates the first and the second air delivery portions from one another. The exhaust air duct contains two slot-like suction openings which extend substantially parallel to the supply air duct and are arranged in the ceiling such that there is formed on both sides of the aisle region a rolling air flow via which supply air heated in the region of work tables passes in a vertical direction into the region of the ceiling.

Claims

1. A configuration for ventilating a room having a passage region which is delimited at both sides by work tables, the configuration comprising: a supply air channel, disposed above the passage region and following a vertical central plane of the passage region, for supplying fresh air into the room, said supply air channel having first and second lateral air supply portions extending along the passage region and each having a plurality of circular air discharge openings formed therein from which a supply air is laterally discharged in a direction of the work tables, said supply air channel further having a substantially air-tight central partition portion disposed between and separating said first and second lateral air supply portion from each other; and a discharge air channel and an extractor fan communicating with said discharge air channel, said discharge air channel being disposed completely above and over said supply air channel and following the vertical central plane of the passage region for discharging discharge air from the room, said discharge air channel having slot-shaped, lateral suction openings formed therein laterally on each side of the vertical central plane and extending substantially parallel with said supply air channel and disposed in a region of a flat, horizontally extending ceiling of the room; said supply air channel and said discharge air channel being disposed and configured so that at both sides of the passage region there is formed an air roll by which the supply air which is heated in a region of the work tables moves in a vertical direction into the region of the ceiling of the room to traverse through said slot-shaped, lateral suction openings into said discharge air channel, said supply air channel being formed from one of a substantially air-tight flexible textile material or a flexible plastics material, said circular air discharge openings being formed as a microperforation having said circular air discharge openings formed in said first and second lateral air supply portions, said circular air discharge openings of said microperforation having a diameter in a range between 0.1 and 1 mm.

2. The configuration according to claim 1, wherein said supply air channel has a D-shaped cross-section with a flattened region adjacent the ceiling of the room and a rounded side thereof facing the passage region.

3. The configuration according to claim 1, wherein said two slot-shaped suction openings of said discharge air channel for producing a substantially constant reduced pressure have an opening cross-section which expands from a fan-side end of said discharge air channel for incoming air.

4. The configuration according to claim 1, further comprising plate-shaped sound-absorbing elements received on the ceiling of the room, said plate-shaped sound-absorbing elements extending from the ceiling of the room as far as said two slot-shaped suction openings of said discharge air channel.

5. The configuration according to claim 1, wherein said supply air channel contains a fitting piece which can be replaced by at least one heat exchanger in order to additionally cool the supply air supplied.

6. The configuration according to claim 1, further comprising cooling members, at both sides of said supply air channel and with a predetermined spacing therefrom there is disposed one of said cooling members through which a cooling medium flows, said cooling members having a plurality of cooled air passage openings formed therein through which the air is directed from a region above said supply air channel in a direction toward a floor of the passage region.

7. The configuration according to claim 1, wherein said supply air channel has a light-permeable material; and further comprising a light source disposed within said supply air channel.

8. The configuration according to claim 1, further comprising a further discharge air channel disposed parallel with said discharge air channel, said further discharge air channel being a blind channel branching from a main discharge air channel which feeds said discharge air channel.

9. The configuration according to claim 1, wherein said circular air discharge openings of said microperforation have a diameter in a range between 0.4 to 0.6 mm.

10. The configuration according to claim 1, wherein said circular air discharge openings of said microperforation have a diameter of 0.5 mm.

11. The configuration according to claim 1, wherein the room is a laboratory room.

Description

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING

(1) FIG. 1 is a schematic cross-sectioned view of a laboratory room with a ventilation arrangement according to the invention, and

(2) FIG. 2 is an enlarged detailed view of the supply air channel and discharge air channel of a ventilation arrangement according to the invention; and

(3) FIG. 3 is a detailed view of the discharge air channel at a fan side end.

DESCRIPTION OF THE INVENTION

(4) As shown in FIG. 1, an arrangement 1 according to the invention for ventilating a room 2, in particular a laboratory room, which has a passage region 4 which is delimited at both sides by work tables 6a, 6b, comprises a supply air channel 8 which is arranged above the passage region and by means of which fresh air which is preferably cooled is supplied from a fresh air generator (not illustrated in greater detail) or a fresh air fan. The supply air channel 8 has two lateral air supply portions 8a, 8b which extend along the passage region 4 and which each have a plurality of circular air discharge openings 10a, 10b, from which the supply air is discharged laterally in the direction of the work tables 6a, 6b. The two lateral air supply portions 8a, 8b are separated from each other by a substantially air-tight central partition portion 8c, which has, for example, ⅓ of the width of the supply air channel 8 and which has no air discharge openings. In the embodiment of the invention shown in FIG. 1, the supply air channel 8 comprises a flexible textile material, which is substantially air-impermeable and which has the cross-sectional shape of a suspended D which is received on two spaced-apart carriers 12a, 12b of a carrier frame which is not otherwise shown in detail. Above the flat portion of the D-shaped supply air channel 8 which is clamped and preferably tensioned in associated longitudinal grooves of the carriers 12a, 12b, according to the invention there are guided media lines 30 for, for example, water, gas, electrical power, etc., which are supported, for example, by a cross-member (not described in greater detail) and which are accessible from the side.

(5) The air discharge openings 10a, 10b are in this instance formed as a microperforation having in particular circular air discharge openings 10a, 10b in the air supply portions 8a, 8b and the partition portion 8c is produced by the substantially air-impermeable flexible textile material in this strip-like partition portion 8c being left non-perforated.

(6) The openings of the microperforation, which are preferably formed prior to the assembly of the supply air channel 8 using a laser or a suitable punching device in the lateral air supply portions 8a, 8b, have in the preferred embodiment of the invention a diameter in the range between 0.3 and 0.7 mm, preferably from 0.4 to 0.6 mm and in a particularly preferred manner of 0.5 mm. However, the air discharge openings may also have an elongate or oval shape.

(7) The material of the supply air channel 8 may at least partially comprise a light-permeable material, a light source 32 being arranged within the supply air channel 8 in order to illuminate the room 2 in this instance.

(8) Above the supply air channel 8, there is arranged with a spacing of, for example, 80 cm to 1 m, an exhaust air channel 14 which comprises two slot-like suction openings 14a, 14b which extend substantially parallel with the supply air channel 8 and which are arranged in the region of the ceiling 16 of the room 2 in such a manner that there is formed at each of the two sides of the passage region 4 an air roll 18a, 18b which conveys the warm air produced in the region of the work tables 6a, 6b by means of heat sources 20a, 20b, such as, for example, screens, electrical operating devices or cooking devices, etc., in a vertical direction into the region of the ceiling 16 of the room 2, from where it is redirected in the direction of the suction openings 14a, 14b and is drawn therein by means of a fan which is not illustrated in greater detail, as indicated by the arrows in FIGS. 1 and 2 which are not described in greater detail.

(9) In order to produce a substantially constant reduced pressure at the suction openings 14a, 14b preferably over the entire length of the passage region 4, the suction openings 14a, 14b of the discharge air channel 14 that are preferably constructed as longitudinal slots expand from the fan-side end 34 of the channel toward the end thereof which in the preferred embodiment of the invention is closed only with respect to the influx of air by means of a closure piece or closure sheet (see FIG. 3).

(10) As can be further seen from the illustration of FIG. 1, there are received in the ceiling 16 of the room plate-like sound-absorbing elements 22, for example, known hard foam material or wooden panels, which have an aperture which is not illustrated and which preferably extend down from the ceiling 16 of the room as far as the suction openings 14a, 14b of the discharge air channel 14 so that the top edge of the respective suction slot 14a, 14b terminates flush with the lower side of the sound-absorbing element or extends a few cm below the lower side of the elements 22. Not only does this produce very efficient and cost-effective sound-damping in the room 2, since the elements 22 can be mounted directly on the ceiling 16 without a separate carrier construction, but it is also ensured that the discharge air can substantially enter the suction openings 14a, 14b without the flow being impeded.

(11) In the preferred embodiment of the invention, with a predetermined spacing A of, for example, 10 cm at both sides of the supply air channel 8, there is arranged a cooling member 24a, 24b, through which a cooling medium, in particular cooling water, which is supplied via one or more of the media lines 30 flows, and which has a plurality of cooled air passage openings 26a, 26b through which air is directed from the region 28 above the supply air channel 8 in the direction toward the floor of the passage region 4.

(12) It is possible to install at almost any desired location in the room to the right and to the left of the passage region as required additional air discharge connections 15 having other extractors, foodstuffs, hot-spot extractors, device housings, etcetera, see FIG. 1. To this end, from a main discharge air channel 14 in which the discharge air channel branches above the passage region at a right angle, there may be provided parallel therewith one or two blind discharge air channels 15 which preferably extend above the end of the work panels of the work tables remote from the passage.

LIST OF REFERENCE NUMERALS

(13) 1 Arrangement

(14) 2 Room

(15) 4 Passage region

(16) 6a, 6b Work table

(17) 8 Supply air channel

(18) 8a Air supply portion

(19) 8b Air supply portion

(20) 8c Partition portion

(21) 10a, 10b Air discharge opening

(22) 12a, 12b Carrier

(23) 14 Discharge air channel

(24) 14a, 14b Suction opening

(25) 16 Ceiling

(26) 18a,18b Air roll

(27) 20a,20b Heat sources

(28) 22 Sound-absorbing elements

(29) 24a,24b Cooling member

(30) 26a,26b Air passage openings

(31) 28 Region

(32) 30 Media lines

(33) 32 Light source

(34) A Spacing