FI71419C - INBLAOSNINGSORGAN FOER TILLFOERSEL AV LUFT - Google Patents

Description

λ 71419

Blower for supplying air

The invention relates to a blowing element for supplying air, in particular when the amount of air has been calculated on the basis of hygienic requirements and the need for heating / cooling is satisfied in another way. Improving the work environment in the form of improving ventilation systems is a very topical area. Many buildings have too much heat during much of the year, such as offices, shops, sanatoriums, schools and also special rooms such as computer rooms, operating rooms and certain industrial premises. The blowing of subcooled air causes problems in the form of draft, both because it is difficult to mix cold air with the room air and because cooling with air requires large amounts of air. Attempts have been made to solve this problem by means of cooling ceilings, in which cold water circulates in the roof pipes and tiles are attached to the pipes to enlarge the surface. Here, the amount of air is calculated on the basis of hygienic requirements 20 and is kept constant regardless of the load. In order to save energy, various heat pump / heat recovery systems have been used, which, for example, transfer the residual heat of the core parts to the edge areas when necessary, or which utilize the accumulation capacity of buildings by blowing air through the holes in the roof elements. "ThermoDeck" system.

In addition, systems are used in which the air volumes are adjustable and in which the air volumes are reduced when the premises are not used to save energy. This does not solve the traction problems when using the apartments.

Recently, attempts have been made to use the so-called. "Displacement system", ie a diffusion blowing system for industrial premises, consisting of a large 35 barrels placed on the floor with a height of 2-3 m and a diameter of the same order. which is 1-2 ° below the desired room temperature and at a speed of 0.1-0.2 m / sec to avoid draft, any heat or residual heat must be covered in another way.

Po. the invention utilizes the principle of the above-mentioned system, according to which the displacement system is used as a blowing system, whereby the air volume 10 is calculated only on the basis of hygienic requirements.

Any heat surplus / deficit must be covered in another way, eg by cooled surfaces, walls, ceilings and floors. The blowing air can, for example, be supplied to the apartments via perforated roof elements 15 on the walls, ceiling and / or floor, to a blowing point where the "bag" described below is placed. In this way, the system is very flexible and combines the advantages of known systems, but without the disadvantages of these. The use of the bag differs substantially from the known and hitherto used technique of blowing in terms of placement area, dimensions and structure. As described below, the amount of air entering the individual "bag" can be adjusted and / or the air can be cut off when leaving the workplace.

25 Therefore, the system saves more energy than known systems.

The invention will now be described in more detail by means of embodiments which show quite schematically: Fig. 1 is a sectional view of a device according to the invention; and Figure 2 shows a shape of a bag seen from two sides.

The bag consists of an outer bag jacket (Fig. 1) attached to a perforated tube 2 inside the bag surface 35. The diameter of the tube is smaller than that of the bag casing 1. An overflow portion 3 71419 is attached to each end of the tube 2 between the diameter of the tube and the diameter of the bag surface 1 and the bag surface 1 is secured to the transition portions 3 by fastening straps 4. At the other end 5 and at the other end the lid 6 is attached in the usual way to the transition parts 3. The bag jacket 1 can, for example, consist of a filter material for simultaneous filtration of air. Inside the perforated tube 2 is a guide or adjustment bag 7, which is kept stretched / retracted by means of one or more springs 8 10. The springs 8 are fixed at the inlet end to the transition part 3 by means of a conical ring 9 and at the other end to an end plate 10. The end of the guide bag 7 is substantially tight so that air is compressed out through the sides of the bag 7. By means of the friction between the springs and the guide bag 7 and the perforated tube 2, the amount of air is adjusted to the level for which the bags are designed. The volume of the bag and the spring force determine the amount of air. These quantities can be changed. In one embodiment, the diameter of the bag casing is 18 cm and the length is 60 cm. With the help of known spring force adjustment devices, the bag can be adjusted for different amounts of air. The bag is positioned so that each workplace can have its own climate, and by equipping the bag in a known manner, not shown in the figures, with dampers for manual or automatic control, the air can be switched off / on as required. This saves energy when the workplace is not in use. By means of the friction and spring force between the guide bag 7 and the perforated tube 2, the bag adjusts the amount of air within certain limits, even though the pressure in front of the bag varies without the noise level causing problems. 30 In order to achieve the desired energy savings, the plant fan must be equipped with devices that change the power, eg speed control, guide rail damper, etc.

With larger amounts of air, other shapes of the bag jacket can be used, e.g. according to Figure 2. In order to use larger guide bags and tubes, several units can be connected together as shown.

4,71419

It is advantageous to make the guide bag tapered, e.g. conical, in order to facilitate insertion, whereby the outer part is sharp and the end plate 10 does not have to be used.

The outer bag jacket 1 can also be omitted completely, in which case the guide bag 7 is preferably a rigid, self-supporting, possibly flexible filter material. In this case, the springs 8 can also be omitted.

Claims (10)

1. Inlet means for supplying air, especially since the amount of air is calculated to be based on hygienic requirements 5 and the need for heat / cooling is otherwise covered, characterized in that an air supply system, preferably a heating / cooling system and / or a a system with blow-in via a floor covering in floors, walls and / or ceilings, is connected to a bag arrangement for distributing air according to a constriction system which comprises a diffusion-blowing per se known in the art, which bag consists of at least one perforated pipe (2), inside which is placed a guide bag (7), and to which the tube is preferably connected a bag (1). 2. Inlet means according to claim 1, characterized in that the bag cover (1) consists of a filter material. Inlet means according to claim 1, characterized in that the control bag (7) is poured 20. tensioned condition by means of springs (8). Inlet means according to claim 3, characterized in that the spring force of the springs (8) can be adjusted. Inlet means according to claim 3, characterized in that the amount of air is adjustable by means of the springs (8) and friction between the pipes (2) and the control strip (7) together or individually. A blow-in means according to claim 1, characterized in that a transition (3) is attached to each end of the perforated tube (2) and that the bag housing (1) is clamped on the transitions (3) with fastening straps (4). The blow-in means according to claim 1, characterized in that the gate is connected to the gate manually or automatically operated damper.