DE2634786A1 - Blow-off unit for air conditioning installations - uses nozzle with guide elements for swirling air movement - Google Patents

Abstract

The blow-off unit is for air conditioning installations, in which the exhaust air of which passed outwards via a nozzle. The blow-out point of the nozzle (1) has guide elements (5) to produce a swirling movement of the outlet flow. The nozzle may have an insert (3) with internal blade-shaped or helical guide elements. Alternately, the nozzle may be surrounded by a jacket tube with supply socket, the guide elements being positioned between socket and tube.

Description

FROM KREISLER SCHONWALD MEYER EISHOLD FUES FROM KREISLER KELLER SELTING

PATENT LAWYERS Dr.-Ing. by Kreisler -f-1973

Dr.-Ing. K. Schönwald, Cologne Dr.-Ing. Th. Meyer, Cologne Dr.-Ing. K. W. Eishold, Bad Soden Dr. J. F. Fues, Cologne Dipl.-Chem. AIeIc from Kreisler, Cologne Dipl.-Chem. Carola Keller, Cologne - Dipl.-Ing. G. Selting, Cologne

5 Cologne ι 2.8.I976 Sch / Sd

DEICHMANNHAUS AT THE MAIN RAILWAY STATION

Fire! Engineers GmbH, Max-Planck-Str. 2-4, 5020 Frechen

Blow-out device for the port air in ventilation systems

The invention relates to a blow-out device for the port air in ventilation systems in which the exhaust air is directed to the outside by means of a blow-out nozzle.

Exhaust air volume flows are used in ventilation and air conditioning systems outwards from different areas with different impurities. Likewise, gases leave of various types, the buildings as exhaust air from e.g. toilets, kitchens, garages, etc., as well as smoke gases. A particular problem arises when the exhaust air volume flows are diverted from hospitals where the contamination can consist of bacteria and germs. The concentration the germs can be very different in certain areas. Furthermore, the discharge of exhaust air from production

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Telephone: (02 21) 23 45 41-4 Tele «: 888 2.107 dopa d - Telegram: Dompalent Cologne

Buildings of the chemical industry, animal laboratories, animal stalls and the like Exhaust air can affect the environment.

In order not to disturb the environment beyond what is necessary to have to, one often uses filter systems in such cases, where very "high concentrations of." Pollutants are to be expected. One also tries to solve the problem with a specific placement of the exhaust air blow point to solve. Another way is the use of dynamic energies to dilute the pollutants, The exhaust air blow point is to be removed from the intake point of the outside air so that recirculation does not occur can come into question.

The economically justifiable solution is to blow away with the help of dynamic energies as opposed to expensive ones Filtering. When the air is blown away with high dynamic energies, one can, if the exhaust air jet is blown vertically upwards, depending on the volume flow, Wind strength, wind direction and beam path length achieve an approximately 10 to 12-fold induction, which is a 10 to Corresponds to a 12-fold dilution. With this solution there is a risk that the pollutant concentration is high saturated exhaust air jet with larger volume flow units and certain wind directions and wind strengths remain in the bundle and a risk of nuisance to the neighboring Areas can evoke.

The object of the invention is to keep the pollutant concentration of the exhaust air flows in the area of the building for each Bringing operating time down to the permissible pollutant level and nuisance to surrounding areas

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even in unfavorable wind and temperature conditions, to avoid. The blow-out device for the exhaust air is characterized according to the invention in that that at the blow-out point of the blow-out nozzle or the like. Arranged guide elements for generating the swirl of the exhaust air flow are.

It has been shown that with the help of swirl elements on the exhaust air volume flow, an extremely strong induction and thus a corresponding dilution can be developed. For example, a 30 to 40-fold induction, ie a corresponding dilution ¹ , at a distance of a few meters from the exhaust nozzle, measured in the jet path, can easily be achieved. The dilution is not influenced by the wind and thermal conditions.

The arrangement according to the invention has the further advantage that no special air blow-off structures, such as special Fireplaces, etc., are required. The surrounding areas are exposed to unacceptable high levels of pollutants Concentration not bothered. Furthermore, there is no coordination between the blow-out and outside air intake sections solve particular difficulties. There is no need for costly model tests with regard to the outside air / Exhaust air situation carried out when building a structure to become. Furthermore, exhaust air streams creeping down along the facade, e.g. gases during low-load operation and avoided when there is no wind. The air with a high concentration of pollutants cannot get inside the building get back. Furthermore, a rapid decrease in temperature in the case of warm exhaust gas flows is ensured by the intensive

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Mixing of the outside air achieved.

The swirl-generating guide elements are advantageously located on the inner wall of the exhaust connection for the Exhaust air. Here, the exhaust nozzle can have an insert at the exhaust end, on the inner surface of which in the essentially the shovel or helical shape; running guiding bodies are provided.

You can also make the arrangement so that the exhaust port is provided with a jacket tube, with screw lines between the jacket tube and the exhaust nozzle mig running guide elements for the port air exiting through the annular space are arranged. The latter execution

The shape is particularly suitable for flue gas fireplaces.

The invention is explained below with reference to the exemplary embodiments shown in the drawing.

Fig. 1 shows an exhaust air nozzle with the inventive! moderate device for reducing the pollutant concentration of the exiting exhaust air flow in longitudinal section and in the scheme.

Fig. 2 shows a further arrangement of the device according to the invention in a chimney for flue gases and the like.

A blow-out nozzle 1 for the exhaust air 2 is provided with an insert 3, on the inner surface h of which guide elements 5 are arranged which exert a swirl-generating effect on the exiting exhaust air. The leading organs 5 »the screw! can run in the shape of a benign with a steep course,!

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j -X-

are advantageously evenly distributed. With out! occurs the exhaust air from the interior of the insert 3 : these are surrounded by an annular air curtain j which is swirled. This creates a high induction j 5 causes the ambient air, resulting in a significant

! Dilution of the exhaust air jet leads, so that the damage substance concentration is significantly reduced.

In the embodiment of FIG. 2, one is the exhaust air I 2, e.g. flue gases, receiving chimney pipe 6 from one

10 casing pipe 7 surrounded by feed stubs 8, with guide elements 10 providing swirl in j the annular space 9 i are. This can be done in such a way that a part

the exhaust air is sent to the outside through the jacket pipe 7, so that the Fort-15 emerging from the chimney pipe 6 air from the ring-shaped surrounding, merges into one

Exhaust air located in swirl is favorably influenced for a high induction of 1 ambient air. If i. the chimney pipe 6 as a flue gas chimney with natural ent-; smoke serves, part of the exhaust air flow of the; 20 ventilation system of the building through the Manteli ring duct 9 are blown away so that the exhaust air jet forms a support, mixed and injection jet around the flue gas volume flow. In this way the; Downward air movements of the flue gas or the like. along the ; 25 Outer wall of the chimney, roofs and facades of the building , even with partial load operation and in windless times full! be avoided.

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Claims (4)

Expectations ί 1. (Blow-out device for the port air for ventilation Systems and the like, in which the port air is led outside by means of a nozzle, characterized in that: that at the outlet point of the outlet nozzle (1,7) guide elements (5) to generate the swirl Port airflow are arranged. 2. Blow-out device according to claim 1, characterized in that the blow-out nozzle for the port air its inner wall is provided with the swirl-generating guide elements. 3. Blow-out device according to claim 1, characterized in that the blow-out nozzle (1) at the blow-out end an insert (3) or the like. has, and that on the inner surface of the insert (3) the shovel or helically extending guide elements (5) are provided. 4. Blow-out device according to claim 1, characterized in that the blow-out connection (6) from a jacket tube (7) is surrounded by supply stubs (8), with the Swirl-generating guide elements (10) are arranged for the port air exiting through the annular space (9). 709886/0105 ORIQlNAL INSPECTED