DE8713390U1 - Ventilation device for removing exhaust air from rooms - Google Patents

Description

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HEINRICH GEllTZ Patent Attorney 1söo Karlsruhe &igr;, PO Box 270&bgr;

872557

Applicant Company FSL

Window System Ventilation GmbH InnstraQe 16
D-6800 Mannheim 24

Ventilation device for removing exhaust air from rooms

The invention relates to a ventilation device intended for installation under a double-leaf window for removing exhaust air through the space between the outer and inner glazing of the window from forced-ventilated rooms in buildings _, which extends at least over a substantial part of the width of the window and has an upper inlet duct which, when installed, is connected to the space between the windows, and an exhaust air duct leading to the outside and having at least one non-return flap which can be brought into its open position by internal excess pressure.

A ventilation device of this type is already known from DE-OS 28 17 915, which is a structural element inserted under a double-wing window between its lower beam and a parapet. This ventilation device has a space between the two wings of the window in

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A channel that is connected to the flow connection* and also extends essentially over the entire width of the window, which is separated from another channel that opens out on the outside of the room by a partition wall with overflow slots that have non-return valves, but is connected to the other channel in terms of flow in such a way that exhaust air that is led through the space between the window sashes with a certain excess pressure activates the non-return valves into their open positions and thus flows outwards.

In ventilation systems constructed using such ventilation devices, the exhaust air is discharged under internal overpressure through the space between the outer and inner glazing of a double-leaf window, which on the one hand effectively prevents the windows from fogging up as a result of condensation in the space between the windows, and on the other hand, since the exhaust air from the room is applied to the inner glazing, cold radiation in the vicinity of the window, which impairs comfort, is avoided. However, this requires that a constant flow of exhaust air is passed through the space between the window sashes. On the other hand, condensation will form in the space between the windows and thus the windows will fog up if exhaust air is not continuously discharged and there are noticeable temperature differences between the room and the outside air.

However, effective ventilation of a room does not require a constant supply of fresh air or the continuous removal of exhaust air.

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I in this respect the invention underlying

I Task in improving the previously known

I ventilation unit in such a way that even then condensate

$ water formation in the space between the panes and a

ä Cold that impairs the comfort in the room

t radiation from your glazing can be avoided if

% lur Reduction of ongoing heat losses no reduction

&Idigr; air is removed from the room and replaced by fresh air

i is replaced.

I The German utility model 80 19 601 already

f, a ventilation system that is used for energy-efficient

&Idigr; Ventilation of a building on its weather side

I have internal glazing on the outside and inside of the room

5 facing room via an exhaust air and a fresh air

I air duct. In the parapet area below the

I Glazing is a ventilation element in this ventilation system.

I aggregate with one heat exchanger and one in

the corresponding channel switched on exhaust air and

i Fresh air blower is arranged. The exhaust air flow is

( via a panel in the upper part of the interior glazing)

' arranged suction opening and through the space between the outer and inner glazing.

i sucks and can either directly, i.e. in the circuit,

j returned to the room or in heat exchange

I »with a fresh air flow over the heat exchanger

f of the unit to the outside.

\ Ventilation systems of the aforementioned type with fresh and exhaust air flows guided in the heat exchanger are, however, structurally quite complex and require? ⁴ ·"*; Tte

; Supply and exhaust air fans. The aim of the invention is

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about the creation of a simple and inexpensive ventilation device for the construction of an effective ventilation system.

This object is achieved according to the invention in that in the ventilation device according to the generic term of the protective claim 1, the exhaust air duct can be shut off at a distance from the non-return flap, including a "standing" air volume | in relation to the inflow-side inlet duct, and that a thermal duct opening out on the inside of the room can be connected to this inlet duct. i

What is characteristic of the ventilation device according to the invention is that a flow connection can be established between the inlet duct, which in turn can be established with the gap between the outside and inside glazing of a double-leaf window and an exhaust air duct opening out on the outside of the room on the one hand and an Γthermic duct opening out on the inside of the room on the other hand, and in each case with simultaneous blocking of either the thermal duct or the exhaust air duct leading outwards from the gap between the window.

Connecting the gap between the outside and inside glazing of the window to the thermal duct while simultaneously separating the exhaust air duct from the gap between the window leads to the circulation of the exhaust air and thus to a constant flow of room air through the gap between the window.

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With such a flow, the air temperature in the space between the windows cannot fall below the dew point and, accordingly, no condensation can form from the air flowing through the space. This also means that the window panes cannot fog up.

One embodiment of the invention provides as means* for

For optionally connecting the thermal duct to the inlet duct - and thus to the space between the outside and inside glazing of the window - and at the same time blocking off the exhaust air duct from the inlet duct or vice versa, a pivoting guide flap is provided which, in one end position, blocks the inlet duct from the thermal duct and, in its other end position, blocks the inlet duct from the exhaust air duct. This design results in a particularly simple structure of the ventilation device.

A ventilation system is already known from DE-OS 33 41 827, in which a ventilation unit with an exhaust air fan is arranged in the area of a parapet under a window with an inner and an outer glazing and the exhaust air is sucked in through an intake opening arranged in the upper area of the inner glazing through the gap between the inner and outer glazing and the gap between the windows can be switched by means of a pivoting shut-off flap either to an exhaust air intake opening $ of the ventilation unit or to a section of a duct extending through the parapet that opens out on the inside of the room |!, but this ventilation system, in which in the one south stop position

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the shut-off flap shuts off the duct section leading out on the inside of the room while the exhaust air intake opening of the ventilation unit is opened, and in the other position the duct section leading out on the inside of the room is opened while the exhaust air intake opening of the ventilation unit is opened, would not be suitable for forced-ventilation rooms and would also be too expensive for this purpose.

Another embodiment of the invention provides that the section of the exhaust air duct extending between the non-return flap and the guide flap, when the latter is in the position blocking the supply flow path from the space between the panes to the exhaust air duct, is divided into several adjacent flow paths by partition walls arranged at a distance from one another. The arrangement of such partition walls effectively prevents the occurrence of thermal currents in the exhaust air duct and thus contributes to the blocking of the air flow.

air duct compared to the inlet duct - which is connected to the space between the windows in the installation position - to ensure an insulating air cushion.

According to another development, the non-return valve, which can be activated into its open position by internal overpressure of the exhaust air, is arranged in such a way that it automatically moves into its closed position under the effect of gravity. It has also proven to be advantageous if the non-return valve can be pivoted about an inflow-side pivot axis from an approximately horizontal closed position into an open position by exhaust air flowing in from below. With such an arrangement,

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When the non-return valve is in the closed position, it is subjected to external air pressure so that the non-return valve closes more and more tightly as the pressure difference increases.

If, according to a further development of the invention, the non-return valve is made of light and heat-insulating material, on the one hand it is guaranteed to move easily and, on the other hand, good heat insulation is ensured when the exhaust air duct is blocked. The ventilation device as a whole can also be advantageously designed as a statically supporting component and sound-insulating.

Two alternative embodiments of the ventilation device according to the invention and the structure of a ventilation system using such a ventilation device are explained below with reference to the attached drawing. Schematic views show:

Fig. 1 shows a ventilation device according to the invention intended for installation under a double-leaf window in a perspective cross-section,

Fig. 2 shows a cross-section through the ventilation device according to Fig. 1 in an enlarged view,

Fig. 3 in a view as in Fig. 2 an alternative embodiment of the ventilation device and

Fig. 4 shows a vertical section through a ventilation facade with a ventilation device arranged in the parapet area of a double-leaf window.

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In the case of the ventilation facade 10 shown in Fig. 4
is under a box window 11 with an external view^
glazing 12 and a spaced-apart
Interior glazing 13 in the area of a parapet 14
Ventilation unit designed as a load-bearing structural element 15
Furthermore, in the area of the parapet,
which can be built up, for example, inside the room

side under the ventilation unit 15 a radiator 16 |

a conventional heating system. The radiator 16 and |

the ventilation unit 15 are on the inside of the room by a |

covered by the open parapet cladding 17 below, |

which up to the height of the lower frame of the window 11 k

and an upward flow channel I

19, which in an upper outlet opening 20 |

flows into the room. ,

In the area of the upper frame 22 of window Il is |

the gap 24 between the outer and f

Interior glazing 12, 13 channel connecting to the room 25 |

and on the underside there is the space 24 between j

see the discs 12, 13 over a substantially |

entrance extending across the entire width of the window .

channel 26 with a room outside and directed downwards Sj

tet opening .exhaust air duct 28 and a room interior f.

tig near the upper outlet opening 20 of the after \

upward directed flow channel 19 opening thermal |

duct 29 of the ventilation unit 15. By means of |

a pivoting guide flap 32 of the ventilation unit 15 f

the gap 24 between the outer and inner \

glazing 12, 13 of the window 11 optionally with simultaneous »

shutting off the other channel on the Ther- (

mic duct 29 or the exhaust air duct 28. \

The guide flap 32 can preferably be centrally controlled by a

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other ventilation systems not of interest here controlled«

The ventilation device 15, shown in Fig. 2 in a cross-sectional view enlarged compared to Fig. 1, extends along the lower edge of the window essentially over the entire width of the window. The pivoting guide flap 32 is in a position which exposes the exhaust air duct 28 and blocks the thermal duct 29 from the inlet duct 26 and can be pivoted by means of a servomotor (not shown) into the position shown in dashed lines at 33 ₍ in which, when the exhaust air duct 28 is blocked, the space 24 between the panes of the window sashes is in flow connection with the thermal duct 29.

Near the outlet of the exhaust air duct 28 on the outside of the room, a non-return flap made of light and heat-insulating material is arranged in the latter, which can be automatically pivoted by an exhaust air flow occurring in the exhaust air duct 28 under internal overpressure about an axis 36 running parallel to the pivot axis 35 of the guide flap 32 into an opening position releasing a flow cross-section 37 as shown in Fig. 2, but in the absence of such an exhaust air flow, i.e. when the guide flap 32 is in the position 33 indicated by dashed lines, it reaches its position blocking the exhaust air duct 2.8 near its outlet under the effect of gravity.

The gap between the non-return flap 34 and the guide flap 32 when the latter is in the position 33 closing off the exhaust air duct 28 from the space between the panes «

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The part 38 of the exhaust air duct 28 which extends from the outside is divided into a predetermined number of parallel flow paths by partition walls running parallel to one another. This division into flow paths running parallel to one another ensures that when the exhaust air duct 28 is shut off from the inlet duct 26, which is connected to the gap 24 between the window panes when the ventilation device 15 is used as intended, as shown in Fig. 4, no thermal currents can build up in the air then enclosed between the two flaps 32, 34.

In Fig. 3, the same reference numerals have been used for the same parts as in Fig. 2, but marked with a dash to distinguish them. The embodiment of the ventilation device 15" according to this figure differs from the device according to Fig. 2 by a simplified device structure.

If, with a ventilation device installed as shown in Fig. 4, the thermal duct 29, 29' is closed ^off from the inlet duct 26, 26' - and thus from the gap 24 between the window sashes - by means of a 4-blade flap 32, 32*, as shown in Figs. 2 and 3, the exhaust air duct 28, 28' is in flow connection with the aforementioned gap 24 between the window sashes. In view of the forced ventilation of the room, the exhaust air flows outwards via the gap 24 between the window sashes and the exhaust air duct 28, 28' when the non-return flap 34, 34' is raised to its open position by the exhaust air flow. However, if the guide flap 32, 32' is pivoted, the exhaust air duct 28, 28' is closed off from the inlet duct 26, 26' and thus from the gap 24 between the window sashes.

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into its other end position 33, 33' while simultaneously blocking the exhaust air duct 28, 28 ^f the space

&rgr; 24 between the window sashes on the thermal channel

%. 29, 29' is switched, depending on

the applicable boundary conditions in the interim^

&uacgr; space 24 between the window sashes a falling

or rising convection flow takes place.

A falling convection current in the space between the window sashes occurs at low outside temperatures without solar radiation. Rising convection currents , on the other hand, form

�iacgr; in sunlight and the resulting warming

■· ventilation of the air in the space between the windows.

The convection flow of the exhaust air in the space between the outer and inner glazing 12, 13 of the window 11, regardless of whether this flow is falling or rising, ensures on the one hand that the exhaust air releases part of its heat back into the room via the pane of the inner glazing 13 and thus the heat transmission loss is significantly reduced, but on the other hand the comparatively high temperature of the inner pane ensures comfort in the room in the immediate vicinity of the pane.

s When the gap 24 between the window

wings separated exhaust air duct 28, 28' but

Heat losses through this channel are also effectively prevented by the fact that between the eir-. self-acting non-return valve forming

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flap 34, 34' and the guide flap 32, 32', a "standing" air volume is enclosed, which acts as an insulating cushion between the exhaust air that is then circulated and prevents or at least greatly reduces heat leakage from the exhaust air to the outside. This is particularly true in view of the division of the exhaust air duct 28, 28' in the duct section 38, 38' by partition walls running parallel to one another into a large number of parallel flow paths, which prevent the occurrence of thermal currents in the area between the guide flap 32, 32' and the non-return flap 34, 34'. In addition, both versions of the ventilation device 15, 15' are designed to be soundproof in accordance with the sound insulation values of the window 11.

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Claims (8)

ft · · 1"VtC 1 · · dr. iNG. HEINRICH GEITZ Patent Attorney 7500 Karlsruhe &igr;, PO Box 2708 872557 Applicant: FSL Fenster-Systüm-Lüftung GmbH Innstraße 16 D-6800 Mannheim 24 Protection claims: 1. Ventilation device intended for installation under a double-leaf window for removing exhaust air through the space between the outer and inner glazing of the window from forced-ventilated rooms in buildings, which extends over at least a significant part of the width of the window and has an inlet duct on the top which, when installed, is connected to the space between the windows and an exhaust duct leading to the outside and having at least one non-return flap which can be brought into its open position by internal overpressure, characterized, that the exhaust air duct (28, 2C) can be shut off at a distance from the non-return valve (34, 34') with the inclusion of a "standing" air volume in relation to the inflow-side inlet duct (26, 26') and that a thermal duct (29, 29' } opening out on the inside of the room can be connected to this inlet duct. - 2 ii H t » ■· it &eacgr; · t * it * tit-tit era c« 872557 - 2 - 2. Ventilation device according to claim 1, characterized in that a pivotable guide flap (32, 32') serves as a means for selectively connecting the thermal duct (29, 29') to the inlet duct (26, 26') while simultaneously blocking the exhaust duct (28, 28') from the inlet duct or vice versa, which in one end position (33, 33') blocks the inlet duct from the thermal duct (29, 29') and in its other end position from the exhaust duct (28, 28'). 3. Ventilation device according to claim 2, characterized in that the section (38, 38') of the exhaust air duct (28, 28') extending between the non-return flap (34') and the guide flap (32'), when the latter blocks the inlet duct (26, 25') from the exhaust air duct (28'), is divided into several flow paths lying next to one another by partition walls (40, 40') arranged at a distance from one another. 4. Ventilation device according to one of claims 1 to -\, characterized in that the non-return flap (34, 34') which can be brought into its open position by internal excess pressure of the exhaust air automatically reaches its closed position under the effect of gravity. 5. Ventilation device according to one of claims 1 to 4, characterized in that the non-return flap (34, 34') can be pivoted about an inflow-side hinge axis (36, 36') from an approximately horizontal closed position into an open position by exhaust air flowing in from below. I « ·· ■ I I I I · &igr; · · « « &igr; t t t H · · I · < « « < « t fif · i i &bull; I ' ' ltlll M &igr; 872557 6. Ventilation device according to one of claims 1 to 5 ₍ characterized in that the non-return flap (34, 34') consists of light and heat-insulating material. 7i Ventilation device according to one of claims 1 to 6, characterized by the design as a statically supporting component* 8. Ventilation device according to one of claims 1 to 7, characterized by sound-insulating design*