WO2007006568A1

WO2007006568A1 - Air guide box

Info

Publication number: WO2007006568A1
Application number: PCT/EP2006/006828
Authority: WO
Inventors: Udo Berling
Original assignee: Berbel Ablufttechnik Gmbh
Priority date: 2005-07-12
Filing date: 2006-07-12
Publication date: 2007-01-18
Also published as: PL1902258T5; ES2335689T3; EP1902258A1; AU2006268849A1; RU2008105049A; DE502006005256D1; EP1902258B1; ES2335689T5; DK1902258T4; EP1902258B2; PL1902258T3; ATE447146T1; PT1902258E; DE202005010912U1; DK1902258T3

Abstract

The present invention relates to an air guide box, in particular a wall box, as an insert into a wall of a building, having a fan tube which comprises a ventilation opening for inlet air and/or exhaust air, which ventilation opening can be closed off by means of a closure which can be moved from a closed position into an open position. The closure is provided with thermal insulation which can be positioned in a section of the fan tube when the closure is in the closed position and can be positioned outside the fan tube when the closure is in the open position.

Description

AIR FLOW BOX

The present invention relates to an air duct box, in particular wall box, as an insert in a building wall with a ventilation opening for supply and / or exhaust air, which is closable by means of a movable from a closed position to an open position closure.

Prefabricated wall boxes for ventilation of buildings as a form of the generic air duct boxes are known in a variety of configurations. The ventilation boxes are used to create an opening in the wall of a building for the supply of incoming and / or exhaust air. As a building wall is not only a wall, but also roofs, glazings, insulated panels and panels and the like into consideration. The possibility of carrying air streams through the building wall through as incoming or outgoing air can result for different reasons, for example, to dissipate odorous exhaust air or used room air, or to introduce fresh or cooling air into the building.

A generic air duct box is disclosed for example in the published patent application DE 39 39 658 A1. In this air guide box, a pivotally mounted closure is included. If this is in its closed position, no exhaust air can escape to the outside and no supply air can penetrate into the fan tube. By the closure of the air duct box is prevented in this way in particular that with the escaping exhaust air and a part of the building heat is lost.

A disadvantage has been found in the known air duct boxes, however, that the closures have only a low thermal insulation. Even if warm air can no longer escape from the building in the closed position of the closures, the closure itself still transfers considerable amounts of heat to the outside air. Also, the prior art air duct boxes are not always tightly closed in the closed position, so that still drafts can flow through the fan tube into the building or out of the building. Another disadvantage of the known air duct boxes is the fact that the closure and the associated closure mechanism oppose the supply and exhaust air flow a significant flow and thereby the throughput of connected to the respective air guide box fan units, such as cooker hoods, clothes dryers, Toilettenlüfter, air conditioners, heat exchangers and the like is significantly impaired.

Accordingly, it is the object of the present invention to provide an air guide box, on the one hand has a good thermal external insulation and in which the closure in the supply or exhaust air operation causes only the lowest possible flow resistance to the supply or exhaust air flow. In addition, the closure should close the fan tube in its closed position possible good sealing.

The object is achieved for a generic air guide box by the closure is provided with a thermal insulation, which is positionable in the closed position of the closure in a portion of the fan tube and in the open position of the shutter outside the fan tube.

By combining the closure with thermal insulation, the potential for heat losses caused by the air guide box is significantly reduced. The ability to move the thermal insulation in the open position of the closure in a position outside the fan tube, the flow resistance is not increased by the thermal insulation in such a product design. Despite the thermal insulation of the air duct box for the periods in which no supply or exhaust air are sucked in or blown out through the air guide box, the throughput of the connected to the air guide box hood during their operation is not adversely affected. With a favorable design of the linkage, of which the closure is held with the thermal insulation, it is even possible to lower the flow resistance of the air guide box against the incoming or exhaust air flowing through it compared to the previously known air duct boxes. By the air guide box according to the invention, therefore, the suction of a connected ventilation device, such as a hood, heat pump or air conditioning can be increased.

The air guide box according to the invention can be produced inexpensively. So it is possible to produce the fan tube made of commercially available PVC pipes. The PVC pipes can be bought cheaply and in many cross-sectional sizes. The PVC pipes transmit little heat energy through their walls. The PVC pipes can be made in any length be cut so that an air guide box in a simple manner to the wall thicknesses of the respective building wall, in which it is to be installed, is adaptable. The PVC pipes are corrosion-free and can easily be used with cement, silicone or gypsum in existing building walls. The round tube cross-section makes it easy to cut accurately fitting holes with rotating tools in building walls. In this way, the air guide box according to the invention can also be retrofitted at any time in existing buildings with little effort. For the installation, it does not matter whether the relevant building wall has a single or multi-skin structure.

Modifications and advantageous embodiments of the invention can be taken from the following objective description, the features of the subclaims and the accompanying drawings.

The invention will now be explained in more detail using an exemplary embodiment. Show it:

1 is a view of a longitudinally cut air guide box,

Fig. 2 is a view of a air duct box with open closure and

3 shows a view of a ventilation box with a closed closure.

In Fig. 1, an air guide box 2 can be seen, which consists essentially of a fan tube 3 with a ventilation opening 4 and a closure, which consists essentially of an insulating body 8 and a lid 10, is constructed. In the longitudinal sectional view seen in Fig. 1, the respective components are clearly visible.

In the exemplary embodiment, the fan tube 3 is shown as a round tube, but it may also have other suitable tube cross-sectional shapes, such as quadrangular, hexagonal, trapezoidal and the like. The fan tube 3 can be inserted into a sufficiently large opening of a building wall. The connection with a masonry as an example of a building wall can be made by cement or gypsum, which can be filled in the air gap between the outer surface of the fan tube 3 and the inner surface of the building wall opening. Also adhesive bonds with adhesives, PU foam, silicone and the like are possible. The fan tube 3 may have such lengths that it can be used in common building walls, or the fan tube 3 is supplied in excess and can be shortened by sawing the protruding part to a suitable length. In a preferred embodiment, the fan tube 3 is made of a PVC material, but it can also be used as a material other plastic materials, metal, clay and the like.

In the installed state of the air conduction box 2 flows in the embodiment shown in Fig. 1, an exhaust air flow in the blowing direction B through the fan tube 3 therethrough. At the end at which exits the exhaust air from the fan tube 3 in the embodiment, there is the ventilation opening 4. From the vent 4, the exhaust air can flow past the closure 6, when it is in an open position. Deviating from the exemplary embodiment, a supply air flow through the ventilation opening 4 can be sucked in or blown against the blowing direction B into the fan tube 3.

In Fig. 1 is indicated in dashed lines, where the insulating body 8 is in the closed position of the closure 6. The length of the distance S, by which the shutter 6 is displaced from the open position to the closed position, is greater than the thickness D of the insulator 8. By these length ratios relative to each other ensures that in the open position of the shutter 6, a gap between the gap Ventilation opening 4 and the insulating body 8 results, which has the dimension A. The dimension A should have a minimum value of 50 mm to create a passage gap between the vent 4 and the shutter 6, which does not build up a flow resistance against the flow rate of the connected hood.

In Fig. 1 is clearly visible that the insulating body 8 is immersed as a thermal insulation of the shutter 6 with its entire thickness D in the closed position in the fan tube 3. Between the outside air and the remaining cavity in the fan tube 3 results in a highly effective thermal insulation, can be reduced by the heat losses through the shutter 6 to a minimum. On the other hand, the open position of the closure 6 allows unimpeded outflow of the exhaust air from the and an unimpeded inflow of supply air in the air guide box 2. In this way, an excellent thermal insulation in conjunction with a minimum flow resistance against the respective air flows is realized.

The insulating body 8 can be inexpensively made of a polystyrene or PU foam material. These materials provide excellent thermal insulation properties while still being lightweight and cost effective. As insulator 8, however, can also be a plug be used, which has an inner provided with a vacuum insulating space. Other known solutions for thermal insulation can be realized in the insulating body 8.

The insulating body 8 has an outer shape, which is adapted to the cavity shape of the ventilation opening 4 and / or the fan tube 3 in the closed position of the insulating body 8 at least almost sealing. Due to the at least nearly sealed shape is avoided that occur laterally on the insulator 8 vorbeistreichende air flows heat losses. However, the insulating body 8 with its shape may not sit too tightly in the closed position in the fan tube 3, as this would affect the opening and closing of the shutter 6 too much. Here a suitable compromise must be found. Alternatively or in addition to the almost sealing fit of the insulating body 8 may be provided with one or more sealing rubbers which slide on retraction and extension of the closure 6 on the inner surface of the fan tube 3 and sealing by a certain inherent flexibility both to the shape of the insulating. 8 as well as the inner surface of the fan tube 3 can create. Depending on the number, hardness and accuracy of the seals, the operability of the closure 6 by such a seal must not be seriously affected. The seals can be arranged on the insulating body 8 or in the inner wall of the fan tube 3.

In the embodiment shown in FIG. 1, the closure 6 has a cover 10 which protrudes laterally beyond the outer circumference of the insulating body 8 and also beyond the outer circumference of the end face of the fan tube 3. By virtue of the cover 10 which engages over the cross-section of the ventilator tube 3, the ventilator tube 3 can be sealed well in the closed position of the closure 8 to the outside. In a preferred embodiment, the cover 10 is provided on the fan tube 3 side facing with a flexible support 20 such as a foam rubber pad. In the closed position of the closure 6, the cover 10 seals - possibly with the additional flexible support 20 - the fan tube 3 from wind, rainwater, dust, insects and other foreign matter, which can not penetrate into the fan tube 3. The lid 10 may be provided with an attractive coating or paint, so that the air guide box 2 fits unobtrusively into the optical image of the surrounding building wall. The visible in the known wall boxes air vents or slats omitted. Also, the fan tube 3 or the insulating body 8 are no longer visible in the closed position of the closure 6 because of the protruding lid 10. This results in an overall very attractive appearance of such air duct 2. The closure 6 is adjustable by means of an adjusting mechanism 12 which is arranged in the ventilation opening 4 and / or in one of the ventilation opening 4 upstream pipe section of the fan tube 3. The adjusting mechanism can be manually or motor-operated, in particular by an electric motor. In the exemplary embodiment, the adjusting mechanism 12 consists of a rotatably driven spindle tube, by the operation of the shutter 6 changes its spatial position. Toggle mechanisms, telescopic tubes and the like can be realized as an actuating mechanism 12. Due to the arrangement of the actuating mechanism 12 in the ventilation opening 4 or in another pipe section of the fan tube 3, the installation dimension of the air guide box 2 is limited to the cross section of the fan tube 3. There are no separate installation spaces for the actuating mechanism 12 required, which would be expensive to create and also to isolate against thermal losses. Also, seals against pressure losses of the flowing air streams are not required in this embodiment. By embedding the actuating mechanism 12 in the fan tube 3, these can hardly be damaged during transport and dismantling and is housed very protected. In relation to the total cross-section of the fan tube 3, the adjusting mechanism 12 takes only a small space, so that increased by the adjusting mechanism 12 of the flow resistance against the exhaust air flow not in appreciable extent. However, a drive or an adjusting mechanism can also be arranged outside of the fan tube 3.

In order to transmit the adjusting movement of the actuating mechanism 12 to the shutter 6, a linkage 14 is provided in the air guide box 2, which is designed so that it on the inner surface of the ventilation opening 4 and / or the ventilation opening 4 upstream pipe section 16 of the fan tube 3 at least in sections sliding on. As a result of the proposed sliding support, the linkage 14 and indirectly also the closure 6 are supported by the inner surfaces of the ventilator tube 3. With a displacement of the shutter 6 results from this support and a safe guidance in the course of movement. Finally, the closure 6 is held by the support also stable in its open position, in which this may be exposed to high wind forces or a bombardment with a football. With a corresponding design of the linkage 14, the construction of the air duct box 2 proves to be extremely reliable and robust against interference from external influences.

The linkage 14 may have a lattice structure 18 in a section through which, in an open position of the closure 6, the penetration of larger foreign bodies into the ventilation opening 4 is made more difficult. The grid structure 18 is preferably arranged so that the closure effect with respect to the ventilation opening 4, in particular in the open position of the Closure 6 results. The grid structure 18 may be formed so as to additionally stabilize the linkage 14.

The linkage 14 and lattice structure 18 should be designed to produce only the lowest possible flow resistance to a passing airflow. For this reason, the corresponding components should have only the smallest possible material thickness transverse to the flow direction of the air flow. A sufficient stability of the components can still be achieved by the material for the corresponding components is more arranged in a parallel extension to the flow direction of the guided through the fan tube 3 air flow. In the embodiment shown in Fig. 1, the grid of the linkage 14 may be made for example of a galvanized steel or a tough plastic with, for example, only one millimeter material thickness, with the stability of the components of the several millimeters and possibly even centimeters wide webs parallel to Flow direction of the air flow results.

Is a motorized actuator for the displacement of the shutter 6 between an open and closed position present, it is advantageous to combine the circuit with the circuit of the connected ventilation unit, as will be explained below using the example of a cooker hood. About an electrical connection can be actuated with a switch arranged on the hood switch and the actuator. It is particularly favorable if the actuator can be actuated by the on / off switch of the extractor hood. In such an embodiment, it is possible to turn on by turning on the hood at the same time the servomotor, by which the shutter 6 is moved from the closed position to the open position. By coupling the commissioning of the hood with the displacement of the shutter 6 in its open position ensures that the cooker hood is always operated in conjunction with an open shutter 6. The extractor hood can therefore always be operated with optimum performance. Depending on whether analogue or digital components are used for the circuit, it is also possible to design the opening width of the shutter 6 as a function of the respective preselected fan speed. So it may be sufficient to open the shutter only to a small extent, when the hood is operated only at a low fan speed. This also makes it possible to reduce heat losses of the building. Of course, a separate switch can be provided on the hood, through which the user can preselect and adjust the operating position of the shutter 6 separately. In the embodiment shown in FIG. 1, the adjusting movement of the closure 6 takes place between the closed position and the open position in a straight line. Such a solution can be structurally easily represented and is mechanically less prone to failure. Also, the risk of the mechanics being gradually blocked by oils, fats and dirt particles in the exhaust air is reduced to a minimum.

In order to ensure that the insulating body 8 always reliably slides into the ventilation opening 4 during a closing movement of the closure, it is advantageous if at least one side wall section of the closure 6, in particular a section of the insulating body 8, has a conical or trapezoidal shape tapering towards the adjustment path. In the embodiment shown in FIG. 1, the insulating body 8 has on its the fan tube 3 side facing a frusto-conical portion which automatically centered at an emergence of the inclined surface of the front edges of the fan tube 3, the insulator 8 and for a precisely fitting inlet into the ventilation opening 8 ensures. Even if, after prolonged use, individual mechanical components of the actuator or the adjusting mechanism should have a certain play, this can be compensated by the centering function of the inclined surfaces. In this way, a permanent reliability of the air duct 2 is ensured. Additionally or alternatively, the fan tube 3 may have a corresponding shape design.

In Fig. 2 is a view of an air guide box 2 with an open closure 6 is shown. It is easy to see how the exhaust air in the open position of the closure 6 can escape laterally past this into the ambient air. Supply air can easily flow into the ventilation opening 4.

In Fig. 3 the air guide box 2 is shown, in which the shutter 6 is in its closed position. In this view, it can be clearly seen that only the lid 10 of the closure is visible from the outside of the entire air guide box 2.

The description of the invention with reference to the embodiment was for illustrative purposes only and is not intended to limit the inventive features in any way to the embodiments shown. Rather, it is the case that the person skilled in the art can modify the features according to the invention differently from the exemplary embodiment in a manner which seems to be suitable, without, therefore, being dispensed with by the subject matter of the present invention.

Claims

1. air guide box (2) as an insert in a building wall with a fan tube (3), which comprises a ventilation opening (4) for supply and / or exhaust air, which can be closed by means of a closure movable from a closed position to an open position (6), wherein the closure (6) is provided with a thermal insulation, which in the closed position of the closure (6) in a portion of the fan tube (3) and in the open position of the closure (6) outside the fan tube (3) can be positioned.

2. air guide box (2) according to claim 1, wherein the thermal insulation consists of an insulating body (8) whose shape of the cavity shape of the ventilation opening (4) and / or the fan tube (3) in the closed position of the insulating body (8) at least almost is fitted sealingly.

3. air guide box (2) according to claim 1 or 2, wherein the closure (6) has a cover (10) which projects laterally beyond the outer circumference of the insulating body (8).

4. air guide box (2) according to claim 3, wherein the lid (10) is provided on the protruding surfaces with a flexible support (20).

5. air guide box (2) according to one of the preceding claims, wherein the spatial position of the closure (6) by means of an adjusting mechanism (12) is adjustable, in the ventilation opening (4) and / or in one of the ventilation opening (4) upstream pipe section ( 16) of the fan tube (3) is arranged.

6. air guide box (2) according to claim 5, wherein the closure (6) with the adjusting mechanism (12) via a linkage (14) is connected, which is designed so that it on the inner surface of the ventilation opening (4) and / or in one of the ventilation opening (4) upstream pipe section (16) of the fan tube (3) at least partially slidably rests.

7. air guide box (2) according to one of the preceding claims, wherein the linkage (14) in a portion of a grid structure (18) through which in an open position of the closure (6) the penetration of larger foreign body in the vent opening (4) is difficult ,

8. air guide box (2) according to one of the preceding claims, wherein the closure (6) by a motor (S) is adjustable by a distance which is greater than the thickness (D) of the insulating body (8).

9. air guide box (2) according to claim 8, wherein the motorized actuator for the closure (6) via an electrical connection with a switch arranged in an extractor hood can be actuated.

10. air guide box (2) according to one of the preceding claims, wherein the Ver adjusting movement between the closed position and the open position takes place in a straight line.

11. Air guide box (2) according to one of the preceding claims, wherein the closure (6) is displaceable by means of a rotatably driven spindle tube.

12. air guide box (2) according to any one of the preceding claims, wherein at least one side wall portion of the closure (6), in particular a portion of the insulating body (8), and / or the fan tube (3) in the region of the ventilation opening (4) to a Verstellweg conical or trapezoidal shape.