FI127419B - Supply air nozzle - Google Patents

Abstract

The invention relates to a supply air nozzle which is intended to be installed in the jacket of a supply air duct (6), through which nozzle the supply air enters the room space and in which the supply air nozzle has several chambers. The supply air nozzle (1) is divided into chambers with intermediate walls (2) having riser threads with one or more around the center shaft (3).

Description

(54) Name of the invention - Uppfinningens benämning

Tuloilmasuutin

Tilluftsmunstycke (56) References - Anförda publikationer

EP 2322866 A1, GB 2297157 A, EP 2377702 A1, SU 1695062 A1, KR 200445800 Y1, JP 2010255873 A (57) Abstract - Sammandrag

The invention relates to a supply air nozzle for mounting on a wall of the supply air duct (6) through which the supply air is discharged into the room and the supply air nozzle has a plurality of chambers. The supply air nozzle (1) is divided into chambers by one or more intermediate axes (3) with ascending helical partitions (2).

Uppfinningen avser et tilluftsmunstycke finns flera kamrar (6), genome whisking munstycke tiliuften inströmmar account rumsutrymmet och i whisking tilluftsmunstycke finns flera kamrar. Tilluftsmunstycket (1) and med en eller flera runtom centrumaxeln (3) uppdelad i kamrar med mellanväggar (2) som har stiggängor.

2b

2c

20135206 prh 20 -03- 2018

Supply air nozzle - Tilluftsmunstycke

The present invention relates to a supply air nozzle for installation in a supply air duct shroud through which the supply air is discharged into a room and wherein the supply air nozzle is divided into chambers by means of one or more intermediate axes with rising threaded partitions.

Offices, classrooms, conference and meeting rooms often have a large number of people in the same room, relatively densely located. A lot of people in the same space means that the amount of ventilation supply air (qv) due to temperature and comfort must be increased so that the temperature and comfort criteria10 remain at least at the level specified by the building regulations. With the specified supply air flow rate, the air flow rate in the living area must not exceed 0.2 m / s. The living area of a space is usually defined as an area that starts from 0.1 m above the floor and reaches 1.8 meters upwards, ie the area where people are located. The large amount of supply air to a space that is small in relation to the number of people often causes high flow velocities in the seating area, which people perceive as an unpleasant draft.

The most common air vents are: low speed device, ceiling or wall diffuser, chilled beam or supply air duct. Floor-mounted Low Speed Devices 20 require, in addition to the physical floor space, a large amount of floor space for the air currents discharged from the devices, called the safety distance. The spreading lengths of ceiling or wall diffusers generally exceed the dimensions of the space in question, that is, the flow of air extends along the wall surface down to the floor level. Cooling beams are primarily used to cool offices and other premises and have insufficient airflow to 25 e.m. minimum air volume requirements for the premises. The supply air duct aims to distribute the supply air evenly throughout the room. The supply air duct outlet shroud may be routed, the supply air duct sheath may have withdrawn nozzles, or the supply air duct may be provided with supply air nozzles. A common feature of the supply air duct solutions described above is the excessively long throw and poor mixing30 relationship between the supply air and the room air. Long throw problems are almost the same as the roof and wall diffusers described above. Poor supply air (qv) / room air mixing ratio usually results in the supply air stream turning sharply downward towards the seating area after the outlet because the supply air (qv) temperature is lower than the room air.

20135206 prh 20 -03- 2018

EP 2322866 A1, GB 2297157, EP 2377702 A1, SU 1695062 A1, KR 200445800 Y1 and JP 2010255873 represent the prior art according to the preamble of claim 1.

The supply air duct according to the invention has a plurality of new supply air nozzles which are intended to eliminate the above drawbacks.

The supply air nozzle according to the invention is characterized in that the body of the supply air nozzle forms a stepped structure, whereby the supply air flow (qv) is divided into partial air flows due to the shape of the body and the threaded partitions.

Various embodiments of the invention are set forth in the dependent claims.

The partition walls of the supply air nozzle project into the airflow of the supply air duct and invert the airflow of the supply air duct into several equal and evenly distributed partial flow streams that exit the supply air duct at an angle of 90 ° to the flow direction of the supply air duct. When a portion of the airflow in the supply air duct strikes the bulkhead of the supply air nozzle, movement in the direction of its main airflow is stopped and the dynamic pressure of the airflow becomes static at the inlet of the supply air nozzle. Thus, the airflow through each supply air nozzle located in the supply air duct is equalized because Ptot = Pstat =, i.e. the same pressure in each supply air nozzle.

The actual invention is based on the structure of the supply air nozzle, in which the inner part is in a particularly suitable embodiment divided into two to three or more sections or chambers separated by partitions which form an angle which is evenly distributed depending on the number of partitions. In practice, it has been found suitable to divide the supply air nozzle into three sections or chambers, but the number of chambers may also be greater or smaller.

The partition walls of the supply air nozzle are in the form of a pitch so that each partition rotates about 120 ° in the direction of the air flow about the central axis. The pitch and length of the pitch of the partition pitch may be smaller or larger.

The pitch of the partition may also be adjustable for optimum results. The ascending partitions give the air flows through the supply air nozzle a highly rotating movement, which allows the supply air (qv)

20135206 prh 20 -03-2018 centrifugal force allows effective mixing with room air immediately after supply air nozzle outlet. A negligible temperature difference between the supply air and the room air ensures that the supply air (qv) never turns down towards the living area under any circumstances. The rotational movement of the airflow described above removes the forward energy of the airflow from the airflow, which significantly shortens the supply air throw.

Other aspects and advantages of the invention will be apparent from the following description of some embodiments. The description relates to the attached silicon cartridges.

Figure 1 shows the outlet opening (7) of the supply air nozzle (1) according to the invention. The supply air nozzle (1) has three riser-shaped partitions (2a, 2b and 2c) forming an angle of 120 ° with each other.

Figure 2 shows the inlet (8) of the supply air nozzle (1) according to the invention. The partition walls (2a, 2b and 2c) of the supply air nozzle (1) rotate about a central axis (3) in an ascending helix about 120 ° to form three chambers (4).

Figure 3 is a side view of the supply air nozzle (1) according to the invention. The body (9) of the supply air nozzle (1) is stepped (10). The circumference (5) of the supply air nozzle is shaped to accommodate the curvature of the envelope of the circular supply air channel (6).

Figure 4 shows the inlet (8) of the supply air nozzle (1) of the invention, viewed from the direction of the main air flow. The supply air nozzle chambers (4) open to the main air flow thanks to the partitions (2a, 2b and 2c). Due to the stepped (10) structure of the body (9) and the partitions (2a, 2b and 2c), the supply air stream is evenly distributed to the chambers (4) as partial air currents.

Fig. 5 shows an supply air duct (6) provided with a plurality of supply air nozzles (1) according to the invention.

Fig. 6 is a three-dimensional view of the supply air duct (6) with the supply air nozzles (1) according to the invention.

Fig. 7 is a three-dimensional view of the supply air duct (6), in which the supply air flow (qv) is divided into partial air flows by the supply air nozzle (1).

Fig. 8 shows the supply air nozzle (1) according to the invention with an airflow controller (11) mounted in front of the outlet opening.

Fig. 9 shows an inlet air nozzle (1) according to the invention, the body (9) of which has only a sector-shaped inlet opening opening from the side (12).

Fig. 10 shows the supply air nozzle (1) according to the invention, in which the pitch of the pitch of the partitions (2) can be more gentle or steeper.

20135206 prh 20 -03- 2018

Claims (3)

claim 1. Supply air nozzle, which is intended to be mounted in the housing of a supply air duct (6) through which the supply air is spread into the room and wherein the supply air nozzle (1) has one or more upstanding intermediate walls (2, 2a, 2b) located around the center shaft (3). 2c) which / which distributes the supply air nozzle (1) in chambers, and wherein the body (9) of the supply air nozzle (1) is characterized in that the body (9) of the supply air nozzle (1) 10, the shaped structure (10), where thanks to the body (9) and the upright intermediate walls (2, 2a, 2b, 2c) the air flow (qv) from the supply air duct in the supply air nozzle (1) is distributed in the partial air flows. A supply air nozzle (1) according to claim 1 characterized in that the supply air nozzle (1) The flange (5) is adapted to cover the opening in the supply air duct (6), where the bend of the flange (5) of the supply air nozzle (1) is arranged so that it follows the same bend as the housing of the round supply air duct (6). A supply air nozzle according to claim 1 or 2, characterized in that the supply air nozzle (1) the center shaft (3) consists of a tubular structure, where, for example, an air rectifier (11) can be fixed with a pin. 20135206 prh 20 -03- 2018 1/3 20135206 prh 03 -10- 2017