FI58561C - LUFTKONDITIONERINGSTERMINAL - Google Patents

Description

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Patent- oeh raflffearstyrtlMn 'AmMcui Utla | d oeh utUkrMUn publicend 31.10 Q0 (32) (33) (31) W * «y · β» «· Μ« · - · ηΜ pHefkat 20.06 75 IO.O6.75 USA (US) 585558, 58556Ο (71) Carrier Corporation, Carrier Tower, PO Box 1000, Syracuse,

New York 13201, USA (72) Carl Chester Herb, Camillus, New York, Kenneth Kanar Cunningham,

North Syracuse, New York, USA (7 * 0 Oy Kolster Ab (5 ^) Air conditioning terminal - Luftkonditioneringsterminal

The present invention relates to an air conditioning terminal for an air conditioning system comprising two air discharge units, each having two substantially vertical air ducts, each air duct bounded by two opposite vertical wall surfaces, the inner wall surfaces of each air discharge unit being formed to a vertical central wall located in the center of the air conditioning terminal, the air conditioning terminal further comprising a diffuser spaced downstream of the air ducts, the diffuser having two outer side walls and a central wall forming two diffuser discharge slots.

The use of air conditioning terminals or connectors to transfer air-conditioned air from a central air source from 1. equipment to offices, school classrooms and other similar multi-room buildings has become increasingly common. Such connectors are usually located on the ceiling or floor of air-conditioned rooms near windows. Since such connectors are used in rooms with people, the air-conditioned air must be discharged from the connectors as quietly as possible, i.e. the operating sound of the connector must be as quiet as possible. The connector, which has been manufactured for sale with good success, has a unit for adjusting the amount of air-conditioned air discharged into a room or space to be ventilated according to the temperature wishes of the persons in the room. Such an air control unit comprises air-filled bellows (membranes), the filling amount of which varies inversely with the amount of air to be discharged from the connector.

Air-conditioned air is supplied to each connector from the refrigeration unit via the relevant pipes. Each connector comprises a compressed air compartment which communicates with the supply pipe. The connector also includes a manifold equipped with an air purge unit. A plate with several openings is arranged between the compressed air compartment and the distribution chamber.

Previously used connectors had essentially two separate air streams that directed downward through the connector and discharged out of two separate discharge openings.

However, in connectors with a newer design, it has been considered necessary to increase the amount of air-conditioned air to be discharged so that they can be used for specific purposes. Therefore, po. a second air control unit has had to be provided in the connectors to increase the amount of air flowing through them. Such a second unit includes a pair of airflow ducts parallel to the first unit. The pressure of the air passing through the opening provided by the air-filled bellows then decreases. The pressure difference thus affecting the air control unit has been found to cause vibration. Because the previous connectors had only one air control unit, the noise caused by the vibration was very small.

Instead, when another unit is added to the connector, the sound generated by the vibration or similar movement of both units increases. It has also been found that such enhanced sound is generated as a resonance between the two control units.

As a result, the noise generated by the vibrational movement of either unit increases the noise level of the room or space to be ventilated. Therefore, it is important that po. the vibration motion of the units can be eliminated.

And furthermore, since four separate air streams are generated in the connector based on the above, and since there are only two discharge openings in the connector, the separate air flows must be connected to the "countercurrent" with respect to the discharge openings. However, since the air moves quite quickly, when the air flows mix with each other without a control device, a rotation is created, which reduces the operating power of the connector and possibly also causes unpleasant noise.

The object of the invention is therefore to provide an air-conditioning terminal with which the air-conditioned air is discharged into a certain space. The terminal is characterized in that the diffuser Si-side walls with curved portions which are located radially outwardly keskisei, pulling out of alignment, are disposed upstream of the mixing space, located between the two ilraa-discharge unit of the central wall of the lower side and two diffuser discharge gap, and that the air terminal is also connected to vaimenninyksikköihin the limiter and the solid air terminal a body part to prevent movement between the damping units and the body in at least one plane.

Fig. 1 is a schematic diagram showing a section po. an air conditioning connector according to the invention, and Fig. 2 is an enlarged schematic drawing of a portion of the air conditioning connector illustrated in Fig. 1.

The drawings show a preferred embodiment of the air conditioning connector according to the invention. In both figures, the same parts are used with the same reference numerals. Connector 10 illustrates air conditioning connector devices for installation on the ceiling of air-conditioned rooms or spaces.

The connector 10 is part of an air conditioning system, which generally includes air conditioning equipment located in the center thereof. It may again have a filter, a pre-cooling coil, a humidification unit, a cooling coil, a heating coil 1 and a fan which heats, cools, dries, humidifies and filters the air as required.

The fan distributes the air-conditioned air again via the supply ducts to the respective destinations, ie to all air-conditioning air supply connections located in the building.

* 58561

The connector 10 has a primary chamber 1. a compressed air compartment 12 lined with a sound insulating material 14, for example a seal. The compressed air compartment is open at both ends so that it can often be connected to a series of successive connectors, forming a complete air distribution system. Suitable end pieces (not shown in the figure) are then used to connect the po. terminals in series. An air supply and distribution plate 16 having a plurality of openings 18 distributes the supply air evenly from the compressed air compartment 12 to a distribution chamber bounded by the upper and side walls of the distribution plate 16.

At the bottom of the distribution chamber 22 there are a series of closing plates 24 which co-operate with the membranes 26 and 28 of the bellows 1. to be filled as deemed appropriate, thereby forming a pair of air control damping units. When the films 26 and 28 are filled with air, they resemble a pear in shape. Each of the films 26, 28 is glued to a central wall unit formed mainly of curved plates 30 and 31. The plates have a V-shaped recess so that the films are completely empty inside the plates. In this way, a sufficiently large area has been obtained between the functional walls 32 of the bellows 1. of the membranes and the closing plates, in which maximum air flow can be generated. The well-constructed well structure has a smooth surface formed on the plates 30 and 31, which keeps the formation of the vortex to a minimum. The walls of the membranes 32 are usually co-charged, so when the membranes are completely empty, their functional walls are out of the air flow, which minimizes the aeroelastic vibration of the membranes. When the films are recessed in the plates 30 and 31 and further provided with concave walls 32, the distance between the barrier plates and the film wall 32 is increased. In this case, a larger opening is also obtained between the membranes and the sealing plates when there is no air in the membranes, whereby there is a maximum air flow between them. In addition, the wall 32 can be made to move much from its concave position to a certain convex position without stretching the film material. The plates 30 and 31 have notch openings 35 for the devices in question, e.g. screws or bolts, so that po. the plates can be connected to the end plates (el shown in the figures).

The discharge unit has side diffuser sections 36 with the lower end 38 curved outwards and a center diffuser section 40. The diffuser sections are suitably connected to a section 42, which again acts as a connecting piece and forms a subunit of these 585 diffuser sections. Preferably, the connector further comprises a sound-insulating material, e.g. a glass wool plate 41, which is arranged in the supply current from the air control units. Plate 41 defines the outer walls of the connector. Glass wool sheets are able to attenuate medium and high sound waves, but not low frequency waves.

The ceiling-mounted air conditioning connector described above is essentially of conventional construction. The only difference between the now described and the previous connector structure is that according to the invention a second air control unit has been added to the connector. Namely, it has been found that in order to use the connector for many different applications, it has been necessary to increase the amount of air-conditioned air supplied from the connector. Until now, units of this type have been able to supply about 5.6 m of air per minute.

In order to be able to control the discharge of the increased amount of air-conditioned air sufficiently effectively, it has been necessary to provide other air regulators. vaimenninyksiköt. The second air control device defines a third and a fourth flow duct so that these become parallel to the air duct air ducts delimited by the first air supply unit. As already mentioned above, the second unit has an additional pair of barrier plates, films, and a partition structure including a pair of convex plates.

Air conditioning units such as those described above are characterized in that the noise level generated by them can be kept to a minimum. Po. namely, the units are used to air-condition rooms with people. To date, in air conditioning units with only one air control unit, any vibration movement of the unit that has caused low frequency noise has either been ignored or accepted because the noise level has still been minimal. The oscillating movement of the air control units is then due to the pressure difference, which in turn is created by the passage of air between the plates 24 and the openings created between the membranes 26, 28. But, when another unit has been added to the po construction, the low-frequency mic sound has increased due to the vibrational motion of both units. The increased noise level is therefore assumed to be due to po. resonance between units. Therefore, it is important that po. the oscillating motion due to the movement of the air flow through the units can be reduced or eliminated altogether.

For this purpose, the restrictor part 70 is connected to the air control units 6 58561 and to a fixed part of the air vent connector. In this case, for example, a flange 72 can be used. The stop part 70 is generally shown as a spring material. The retaining part then engages the vertical arms 74 of the convex plates of each unit and also the flange 72. The stop part is in direct contact with the outer surfaces of the arms 74 and the outer surface of the flange 72. so that the units cannot move horizontally. It has been found that they move mainly horizontally.

When the air control units are kept tightened in the above-mentioned manner, they cannot move relative to the fixed parts of the connector. And when po. the oscillating motion of the units must be eliminated in this way, nor can a low-frequency noise level be generated in them.

The connector now described includes a vertical wall 43 located primarily on the vertical axis of the connector. Wall 43 separates both radial internal airflows passing through ducts 50 and 52. The wall 43 is preferably made of a sound-insulating material so that both air currents moving along its outer surfaces are damped.

The unit has four separate air streams. They are located downstream of the air dampers. It is important that such airflows be interconnected to provide adequate airflow through the air vents. Po. the openings are between the side diffusers and the inner diffuser. In order to avoid power loss and also to prevent the generation of noise, it must be possible to mix (connect) the air streams without creating unnecessary vortices.

Since the discharge openings are substantially in line with the partition wall 43 in the center of the unit, the airflows through the outer air ducts 46 and 48 must be directed radially inwards so as to coincide with those airflows which again pass through the inner air ducts 50 and 52. The lateral diffuser portions 36 are bent at their upper end 37 so as to direct the airflows radially inward. When the side diffusers are bent in this way, the airflows enter a curved surface which then directs the air gradually in the desired direction.

The inner wall 43 further has a portion 54 attached to the lower surface of the portion 43. Section 54 has pages 56 and 58. arranged at a certain distance above the upper inner surface of the side diffuser, thereby delimiting compartments which then direct airflows passing through 7 58561 so that air is generally directed as a 45 ° flow channel into the mixing space 60. the direction of the air currents is gradually changed, the vortex caused by the mixing of the air currents is kept to a minimum.

The portion 54 is made substantially so as to define an equilateral triangle in which the sides 56 and 58 are of equal length and extend substantially parallel to the curved surface of the side diffusers immediately below them. The sides 56 and 58, together with the curved portions of the side diffusers, gradually direct the air currents downwards towards the discharge opening, which in turn limits the generation of vortices. If the air currents had been directed sharply in completely different directions, they would have created vortices. Although a separate portion 54 is seen in Figure 1, it should be noted, however, that the bottom surface of the portion 43 may be suitably altered to provide the necessary parallel sides 56 and 58.

It has been found that the different airflows generated at the connector should mix with each other "upstream" of the discharge openings in order to make the airflow from them approximately uniform.

In order to further limit the vortex caused by the mixing of the different air streams, the part 54 further includes a vertical damper 62 which faces downwards, i.e. into the mixing space 60, from the lowest tip of the part 54. The portion 62 directs the airflows of the portion impinging thereto to an approximately vertical flow passage. Thus, the airflows from the ducts 46 and 52 move parallel to the airflows from the ducts 48 and 50 as the airflows enter the mixing space 60. The damper 62 is preferably made of a sound insulating material. When the airflows are directed in parallel ducts as they enter the mixing space 60, the vortex formation resulting from the mixing of the airflows can be further limited.

It should now be noted that the invention also requires the use of even more damper units, so that the adjustable airflows are directed to only one mixing space 60. And although only one restrictor device structure is shown, other devices can be used according to the invention to prevent movement of the units.

Em. the structure is capable of mixing at least four separate air streams without causing a substantial vortex formation.

Claims (3)

58561 8 An air conditioning terminal for an air conditioning system comprising two air discharge units each having two substantially vertical air ducts, each air duct bounded by two opposite vertical wall surfaces, the inner wall surfaces of each air discharge unit being formed by a damping unit and the two air outlets to a vertical center wall located in the center of the air conditioning terminal, the air conditioning terminal further comprising a diffuser spaced downstream of the air ducts, the diffuser having two outer side walls and a central wall forming two diffuser discharge slots (characterized by 38) curved parts (37) located radially outwards from the central wall (U3) are located upstream of the mixing space (6θ) located between the two air the central wall of the discharge unit (* + 3) and the underside of diffuser between the two discharge gap, and in that the ends of air-terminal has further vaimenninyksikköihin (26, 30; 28, 31) a combined restrictor portion (70) and a fixed air conditioning terminal body portion (72) to prevent movement between the damper units (26, 30; 28, 31) and the body in at least one plane. Air conditioning terminal according to Claim 1, characterized in that the restrictor devices (70) are formed from a spring-like material. Air conditioning terminal according to Claim 1 or 2, characterized in that the central wall (1 + 3) of the two discharge units has an approximately equilateral triangular part (5 * 0) fixed to its lower part, the sides (56) of the triangular part (5 **) 58) are located opposite the curved parts (37) · h of the side walls (38) of the diffuser. Air conditioning terminal according to one of Claims 1 to 3, characterized in that the central wall (** 3) of the two deaeration units has a vertical damping wall (62) extending downwards into the mixing space ( 60).