DE29813060U1 - Room supply air device - Google Patents

Description

SCHÄFER WERKE GMBH 17.07.1998/Pat/Re/Schm

PO Box 1120 PS 9802

57272 Neunkirchen

Room supply air device Description:

The invention relates to a device for the controllable supply of cold outside air through the outside wall into a room in the area of radiators.

Such facilities have been known for a long time. However, they are becoming increasingly important where heating energy is to be saved through the tight construction of the building's outer shell and increased thermal insulation. The supply of cold outside air only takes place as needed, e.g. by centrally extracting the used air from an apartment.

The cold outside air should be supplied in such a way that it does not cause any disturbances to the comfort level in the occupied area of the room.

Solutions have therefore become known that aim to eliminate this problem by supplying outside air to the area of radiators on the outside wall, sometimes with considerable equipment expenditure.

For example, the supply air is supplied via a supply air box behind the radiator, which covers the full height of the radiator and, due to the box base resting on the radiator, blocks the "normal" convection flow on the back of the radiator, which leads to a reduction in performance when the radiator is in operation without supply air. Another design provides for a supply air box above the radiator, which partially covers its top, which also significantly reduces the "normal" heating output of the radiator. In addition, this box represents an unsightly, formal foreign body on the radiator.

Finally, DE 4328489 C2 has disclosed a radiator with an air supply device, which works with a special air flow through the convection heating surfaces on the back of the radiator. Every radiator based on this concept requires convection surfaces on the back, which in most cases requires special designs, thus preventing the use of standardized stock radiators. In addition, the radiator must be designed to be pivotable in the water connections and fastenings in order to replace the filter in the air supply box, which is also the height of the radiator for functional reasons. In addition to these disadvantages, there is also the fact that for "normal" heating operation, the heat emission in the area of the air supply box is blocked.

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All of these known solutions require increased effort for the setup for guiding the supply air to the radiator and in particular for the actual radiator installation.

The aim of the invention is to eliminate these disadvantages as far as possible, namely to create a room air supply device with the simplest possible design on a standard radiator, which is just as easy to install as a standard radiator in stock, and whose heat output is 100% maintained in every operating mode. The air supply device should also be a standard device that fulfills all the required functions such as sound insulation, adjustable air flap, air filter, easy accessibility and good usability.

This task is fulfilled by a room air supply device, which consists of at least one sound-insulated supply air element equipped with an air filter and control flap, arranged above a radiator in the external wall, and at least one pair of suspension rails for the radiator, which form a flow channel that is completely open at the top and bottom between the radiator and the external wall, between which the supply air element is arranged.

The main innovation in this system is that the air inlet is located close to the inside of the external wall behind an air distribution plate above the radiator between vertical profile elements arranged on both sides, which in the lower part function as the radiator suspension rails. The possibly cold outside air flows in as a flat jet parallel to the wall close to the wall surface from a gap open on all sides under a rectangular air distribution plate of a supply air element.

The horizontal air flows on both sides are diverted at the latest when they hit the vertical profile elements and mix with the warm, upward convection flow of the radiator. The upward supply air flow is also mixed by the convection flow of the radiator. At extreme outlet speeds, an additional storage plate is provided above the radiator, which stops the flow and supports the mixing. The same applies to the downward supply air flow. Since this flows against the upward convection flow of the radiator and due to the large vertical distance from the inflow point to the bottom edge of the radiator, it does not reach the bottom edge of the radiator or it cannot fall into the occupied area of the room. It is mixed beforehand and directed upwards in the flow channel behind the radiator. In extreme conditions, i.e. extremely large supply air volumes per supply air element, a further development of the invention provides a flat horizontal edge resting on the wall at a sufficient distance below the air distribution plate, which stops or redirects the downward flow and supports mixing.

This flat edge can be part of a wall-mounted profile, which in a further development in turn forms a complete prefabricated mounting frame for the radiator with the hanging profiles.

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For very large quantities of supply air per room, two supply air elements per radiator with a correspondingly larger width can be provided. In these cases, the wide radiator is given a third middle suspension rail, which creates a separate flow channel behind the radiator for each supply air element.

An embodiment of the invention is described in more detail below.

Show it:

Fig. 1: the front view of a room air supply device with mounted radiator

Fig. 2: the top view according to II in Fig. 1

Fig. 3: the side view according to III in Fig.1

In Fig. 1, a radiator 1 is attached to an external wall 2 via suspension rails 3 with brackets 4. Approximately in the middle between the suspension rails 3, above the radiator 1, a supply air element, designated overall by 5, is installed in the external wall 2, the air distribution plate 6 of which creates a four-sided air outlet gap 7 to the wall 2 by means of a corresponding distance. The suspension rails 3 form, together with the radiator 1 and the wall

2 a flow channel 8 which is completely open at the top and bottom and in which the upward convection flow is guided behind the radiator 1.

The main purpose of the device is to ensure that the incoming cold supply air, which flows out of the gap 7 parallel to the wall, is absorbed by the rising warm air from the radiator 1 and mixed with it, and under no circumstances reaches the occupied area in front of and next to the radiator 1. Vertical guide surfaces are arranged so that the supply air flows exiting from the sides cannot enter the room from the side behind the radiator 1 due to their high speed. These are in particular parts of the suspension rails 3 above the radiator 1, where the air flow is stopped, diverted and mixed with the warm air from the radiator.

For formal design and as an additional benefit, at the upper end of the suspension rails

3 horizontal support profiles 9 are provided for a cover plate 10, on which the upward supply air flow is also diverted and fed to the radiator warm air flow for mixing and transport into the room.

The downward air flow does not require any flow correction under all normal operating conditions (usual supply air volumes). Due to the large vertical distance of the air outlet from the lower edge of the radiator and the relatively long distance of the opposing radiator warm air flow, the downward cold air flow is mixed and fed into the room with the convection flow on the radiator. In the case of very large air volumes with high air speeds, a flat profile 11 resting on the wall is arranged below the supply air element for the purpose of redirection and mixing. The height of the profile 11 is a maximum of 1/3 to 1/2 the width of the flow channel 8. As a result, the upward convection flow on the rear wall of the radiator in this channel 8 is not adversely affected in any conceivable operating mode of the radiator 1.

Reference list

1. - Radiator

2. - Exterior wall "

3. - Suspension rail

4. - Bracket

5. - Supply air element

6. -Air distribution plate

7. - Air outlet gap

8. - Flow channel '9. -Support profile 10. -Cover plate 11.- Profile

Claims (8)

SCHÄFER WERKE GMBH 17.07.1998/Pat/Re/Schm PO Box 1120 PS 9802 57572 Neunkirchen Room air supply device Protection claims: 1. Room supply air device for the controllable supply of cold outside air through the outside wall into a room in the area of radiators
characterized, that the device consists of at least one soundproofed air supply element (5) equipped with an air filter and control flap, arranged above a radiator (1) in the outer wall (2), and at least one pair of suspension rails (3) for the radiator (1), which form a flow channel (8) completely open at the top and bottom between the radiator (1) and the wall (2), between which the air supply element (5) is arranged. 2. Device according to claim 1,
characterized, that the air outlet of the supply air element (5) occurs in a flat jet via an air outlet gap (7) open on four sides behind an air distribution plate (6) close to the outer wall (2). 3. Device according to claim 1 and 2,
characterized, that the radiator (1) is a standard radiator in stock in a single or multi-row design with or without convection heating surfaces on the back and the suspension rails (3) are designed as a C- or Z-shaped profile with two parallel legs, one leg being used for wall mounting and the other leg holding the radiator bracket (4). 4. Device according to one or more of the preceding claims, characterized in that that the leg height of the suspension rail (3) is at least 2/3 of the clear wall distance of the radiator and the free length of the suspension rails (3) above the radiator (1) corresponds at least to the height of the supply air element (5). 5. Device according to one or more of the preceding claims, characterized in that that horizontal support profiles (9) for a storage plate (10) are arranged at the upper end of the suspension rails (3). -2- 6. Device according to one or more of the preceding claims, characterized in that a wall-resting edge in the form of a profile (11) is arranged below the air supply element (5). 7. Device according to claim 6, characterized in that the profile is firmly connected to the suspension rails (3) and is part of a complete mounting frame for the radiator (1). 8. Device according to one or more of the preceding claims, characterized in that two air supply elements (5) and three suspension rails (3) are assigned to the radiator (1).