FR2841971A1 - Central air conditioning station for industrial premises - Google Patents

Abstract

The air conditioning station comprises a caisson (2) in which there is a filtration unit (3) and a ventilation unit. The caisson internal walls (4) have a circular section so as to reduce dust accumulation zones and facilitate its cleaning. The circular section has two first circular panels (5) assembled to second flat panels. The first panels form a cylinder closed at each end by two side plates (7).

Description

The present invention relates to a central processing unit

  air, especially intended for air conditioning of industrial premises.

  However, although more particularly intended for such applications, it could also be used in any other type of premises and in particular in residential or hospital buildings. It should also be noted that said central processing unit is particularly suitable for premises whose air quality must be particularly monitored, such as premises in the pharmaceutical, hospital, food and micro-electronic fields, for all rooms with dust-controlled, usually called clean rooms. Known air handling units are generally composed of a box in which are arranged various units intended for air treatment, such as filtration units, heating or cooling units and ventilation units. For the maintenance and cleaning of the power plants, we proceed to the removal of the different units that

  it is cleaned separately as well as the cleaning of the box.

  The type of standard air handling unit currently on the market has various drawbacks, including the fact that the box has internal walls forming 90 ° angles between them, which creates numerous areas of dust accumulation. In addition, the parallelepiped shape of the box means that during cleaning, an adhesion phenomenon is created between the liquid and the surface of the internal walls, known under the Coanda effect, thus creating wet surfaces in which

certain bacteria proliferate.

  In this type of device which is intended to diffuse air throughout the premises, it will be understood that it is essential to thoroughly clean the various elements, in particular taking into account the increasing risks due to cases of legionellosis, listeriosis or in

  hospitals with nosocomial diseases.

  The object of the invention is to provide an air handling unit, in particular intended for air conditioning of industrial premises, which overcomes the aforementioned drawbacks and makes it possible to reduce, or even

  remove, dust accumulation areas.

  Another object of the present invention is to provide an air handling unit, in particular intended for air conditioning of

  industrial premises, in which the box can be effectively cleaned.

  Another object of the present invention is to provide an air handling unit, in particular intended for air conditioning of industrial premises, in which said box can be produced in the form of

panels to be joined together.

  Other objects and advantages of the present invention

  will appear during the description which follows which is given only as

  indicative and which is not intended to limit it.

  The invention relates to an air handling unit, in particular intended for air conditioning of industrial premises, comprising a box in which at least one is arranged.

  filtration unit and ventilation unit.

  According to the invention, the internal walls of said box have a circular profile, in whole or in part, so as to reduce the areas

  dust accumulation and to facilitate cleaning of said box.

  It will be better understood on reading the description

  following, accompanied by the attached drawings which form an integral part thereof and among which: - Figure 1 illustrates, in a schematic side view, a first embodiment of the air handling unit according to the invention, - the Figure 2 illustrates, in a schematic side view, a second embodiment of said air handling unit according to the invention, - Figure 3 shows in enlarged view the detail of embodiment

noted I in Figure 1.

  As shown in Figures 1 and 2, the air handling unit 1 comprises a box 2. Said box 2 constitutes a receptacle in which are in particular arranged at least one filtration unit 3 and a ventilation unit not shown in the accompanying drawings . According to the invention, the internal walls 4 of said box 2 have a circular profile, in whole or in part. This circular profile makes it possible to reduce the zones of accumulation of dust and to facilitate the cleaning of said

box 2.

  Indeed, unlike the parallelepiped box of the state of the art, said box 2 has a profile, in whole or in part, circular which makes it possible to eliminate the acute angles over the entire length of said

box 2.

  Said box 2 does not have an angle less than 90, thus avoiding the deposition of dust in particular due to electrostatic phenomena. This shape also avoids the air cushion effect at the edges formed between two panels in the boxes of the state of

  the technique that promotes the deposition of dust.

  However, said box 2 comprises at least two first panels 5 of circular profile assembled directly together or by

  through at least one second substantially flat panel 6.

  Referring more particularly to FIG. 1 representing an advantageous embodiment, in accordance with the invention, it can be seen that said box 2 consists of a set of first semi-circular panels 5 forming a cylinder. Said cylinder is closed at each of its

  ends by two disc-shaped flanges 7 having an opening.

  Said opening is dimensioned to correspond to the dimensions of the unit, for example, in the example of FIGS. 1 and 2, the filtration unit 3,

leading to the outside.

  However, referring to FIG. 2, according to another embodiment, it can be seen that said first two panels 5 can be

  connected to each other indirectly via a second panel 6.

  However, it would also be entirely conceivable to produce a box 2 from a single first cylindrical panel 5, or

  several 5 cylindrical panels assembled end to end.

  According to an exemplary embodiment of the invention, said first panels 5 and / or second panel (s) 6 comprise means

8 integrated assembly.

  Referring to FIG. 3 which corresponds to the enlarged view of the detail noted I in FIG. 1, it can be seen that said assembly means 8 comprise hooks 10 cooperating with rods 11 arranged in

  slots made in said panels 5 and / or 6.

  However, any other type of assembly known to those skilled in the art

  profession could have been envisaged and in particular an assembly of the screwing type.

  In this enlarged view, we also see that the first

  panels 5 consist of several thicknesses.

  In fact, according to the example shown, said panel 5 comprises insulating elements 12. It may advantageously be wool of

  rock for example with a density close to 70 kg / m3.

  We can also use for the insulation of box 2 of the

polyurethane foam.

  Advantageously, the sections 13 allowing the panels 5 to be joined together are made of PVC to prevent the creation of a thermal bridge between the interior 4 and exterior walls of said first

panels 5.

  It is useful to note that the second panels 6 advantageously consist of the same elements as said first

panels 5.

  Said air handling unit 1 also includes a

  base 9 on which said box 2 rests.

  According to the invention, a base 9 is provided, the upper part of which is complementary to the lower part of said box 2 in

contact with said base 9.

  It should also be noted that, depending on the conditions of use of said air handling unit 1, provision may be made for a box 2 in which said first 5 and / or second (s) 6 panels are bent. Advantageously, it is expected that said first 5 and

  second (s) 6 panels are double skin type.

  Naturally, other embodiments, within the reach of those skilled in the art, could have been envisaged without going beyond the ambit

  of the invention as defined by the claims below.

Claims (8)

  1. Air handling unit (1), in particular intended for the air conditioning of industrial premises, comprising a box (2) in which at least one filtration unit (3) and a ventilation unit are arranged, characterized in that the internal walls (4) of said box (2) have a circular profile, in whole or in part, so as to reduce the   dust accumulation areas and to facilitate cleaning of said box (2).   2. Air handling unit in which said box (2) comprises at least two first panels (5) of circular profile assembled directly between them or by means of at least a second panel (6) substantially flat.   3. central processing unit according to claim 2, wherein said box (2) consists of a set of first semicircular panels (5) forming a cylinder closed at each end by two   flanges (7), disc-shaped, and having an opening.   4. Central processing unit according to any one of   claims 2 and 3, wherein said first and second panel (s) (5   and 6) have integrated assembly means (8).   5. Air handling unit according to claim 4 above, wherein said assembly means (8) comprise hooks cooperating with rods arranged in slots made in   said first and second (s) panels (5, 6).   6. Air handling unit according to any one of   claims 2 to 5 above, wherein said first (5) and / or   second (s) (6) panels are curved.   7. Air handling unit according to any one of   claims 2 to 6 above, wherein said first (5) and / or   second (s) (6) panels are double skin type.   8. Air handling unit according to any one of   previous claims, in which a base (9) is provided, the part of which   upper is complementary to the lower part of said box (2) in contact with said base (9).