CZ20002425A3 - Ventilation unit - Google Patents

Abstract

The ventilation unit (10) is fixed in a portable casing (14) with moulded sound and heat insulating parts (16,18,20). A suction opening (22) is provided at the lower face of the casing for intake air. An exit opening (32) is provided at the upper face of the casing for air to be supplied. The casing preferably has a symmetrical shape with rotation symmetry. The insulating part (18) around the ventilator sides is made in two parts.

Description

Technical field

The invention relates to a ventilation unit for a ventilation shaft.

BACKGROUND OF THE INVENTION

In particular, in order to avoid heat loss, apartment buildings are insulated against drafts, especially with regard to the provisions on thermal insulation. However, adequate ventilation must be ensured, which in most cases is sufficient for complete air exchange in the living space within two hours. For ventilation, a vertical shaft is used in which the inner exhaust air duct is arranged. When the natural draft of air is not enough, a fan is needed which is preferably installed in the roof area of the house.

Such fans are commercially available, but must be specially mounted, which requires separately manufactured fasteners. Especially at night, the fan noise is perceived as disturbing.

SUMMARY OF THE INVENTION

The solution to the problem of the present invention is to provide a ventilation unit for a ventilation system for centrally ventilating a dwelling house that is completely pre-assembled.

- 2 avoids disturbing noise, which even an unprofessional force can quickly install on the construction site, on the ventilation shaft assembly.

This problem is solved by the ventilation unit according to the invention, which is characterized in that the ventilation unit is provided with a support housing in which a fan is mounted in a sound-proof and heat-insulated manner, the suction opening for the intake air being formed at the bottom of the housing; an outlet opening for the exhaust air.

The ventilation unit can be supplied as a finished part, and requires no additional work after installation on the ventilation shaft, except for the electrical connection of the fan, and the connection of the exhaust port to the exhaust air duct.

The exhaust air can be removed by means of a commercially available roof passage with a discharge pipe. While the construction situation is decisive for the position of the vertical ventilation shaft and hence the position of the outlet opening, the position of the roof passage at an inclined roof depends on the position of rafters and roof battens. The axial offset between the outlet opening and the roof passage is simply compensated so that the connection of the roof passage to the outlet opening is made by means of a flexible hose.

The ventilation unit support box accepts transverse and weight forces when, for example, a long exhaust air duct must be connected to the ventilation unit.

Especially when using a ventilation unit on a shaft system with a rotationally symmetrical outer cross-section, it is advantageous if the housing also has a rotationally symmetrical outer cross-section. A rotationally symmetrical outer cross section is a round, eight or hexagonal or square cross section. The square shape of the cross-section is preferred.

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Simple mounting of the fan in the housing is achieved by means of sound and heat insulating material fittings. The thermal insulation prevents condensate from separating on the fan, for example, so no water drainage measures are required.

Convenient Accessibility

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to the fan, for example for electrical connection or maintenance, is provided when at least the fitting that surrounds the fan laterally is two-piece, one of the fittings being removable through an opening in the side wall of the housing. Preferably, the side fittings are made as symmetrical halves, with dividing planes extending parallel to the axis. The opening in the side wall can be closed by a door or a cover plate.

The tight connection of the ventilation unit to the ventilation shaft is particularly simple when the suction opening is arranged in a sleeve extending from the underside of the housing. The sleeve may be inserted from above into the inner tube of the ventilation shaft, and may be sealed with a circular cuff seal to prevent false air ingress.

After a longer period of operation, it is possible to replace the fan when the suction inlet of the fan is inserted into said nozzle, and the outlet of the fan is connected to the extract air connection via a length-adjustable duct. A bellows or corrugated hose may be used as a length-changeable pipe.

After removing one half of the side parts, the fan can be lifted up to the extract air connection, while the length-adjustable duct is compressed until the fan inlet of the fan has been ejected from the lower nozzle. Now that the length-adjustable duct is further compressed until the fan suction port is released, the fan can be removed through an opening in the side wall of the housing. The new fan is installed in the reverse order.

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Description of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated in more detail with reference to the drawing, in which Fig. 1 shows a longitudinal section of the ventilation unit and Fig. 2 shows in perspective the fittings for sound and thermal insulation.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 1 shows a longitudinal section of the ventilation unit 10 for a ventilation shaft. A conventional, commercially available ventilator 14 is provided in the rigid sheet metal housing 12. The housing 12 has a square cross section of 300 mm side and 400 mm height.

The fan 14 is fixed in the housing 12 by means of fittings 16, 18, 20 made of sound and heat insulating material.

A suction opening 22 for intake air is formed on the underside of the housing 12, the suction opening 22 being arranged in a sleeve 24 extending 45 mm from the underside of the housing 12.

The suction nozzle 26 of the fan 12 is inserted in the sleeve 24. Therefore, the sleeve 24 is throat widened at its upper end and has an outwardly facing circumferential groove 28 into which an annular sleeve seal 30 is inserted for gas-tight connection of the suction nozzle 26 to the sleeve 24.

An outlet 32 for exhaust air is provided on the top side of the housing 12 and is disposed in the outlet throat 34. The outlet throat 34 also has an outwardly facing circumferential groove 36 into which an annular sleeve seal 30 is inserted for gas-tight pipe connection. exhaust air outlet, • Φ φ φ φ φ • • φ φ · · φ φ φ φ φ φ • · ·

• · φ φ φφ φφ which is inserted into the outlet throat 34.

An outlet orifice 38 of the fan 12 is connected to the outlet orifice 34 by means of a length-adjustable duct 40 which is designed as a bellows. The length-changeable duct 40 is fixed to the outlet neck 38 of the fan 12 by means of a hose clip 42. In order to install the fan 12 and fittings 16, 18, 20 into or out of the housing, there is one side wall of the housing 12, in this case wall 44, removable.

FIG. 2 shows a perspective view of absorbent foam fittings 16, 18, 20. While the lower fitting 16 and the upper fitting 20 are one-piece, the side fitting 18 that surrounds the fan 12 is two-piece, in the shape of two identical half sleeves, of which only one side fitting 18 is shown in FIG.

Claims (6)

PATENTOVÉ Claims Ventilation unit (10) for a ventilation shaft, characterized in that the ventilation unit (10) is provided with a support box (12), in which a fan (14) is mounted in a sound-proof and thermally insulated manner, a suction opening (22) is provided for the intake air, and an outlet opening (32) for the exhaust air is formed on the upper side of the housing (12). Ventilation unit according to claim 1, characterized in that the housing (12) has a rotationally symmetrical external cross-section. Ventilation unit according to claim 1 or 2, characterized in that the fan (14) is fixed in the housing (12) by fittings (16, 18, 20) made of sound and heat insulating material. Ventilation unit according to claims 1 to 3, characterized in that at least the fitting (18), which surrounds the fan (14) laterally, is in two parts. Ventilation unit according to claims 1 to 4, characterized in that the suction opening (22) is arranged in a sleeve (24) extending from the underside of the housing (12). φφ ···· · · • ··· • · φ Ventilation unit according to claim 5, characterized in that the suction branch (26) of the fan (12) is inserted in the sleeve (24), the outlet opening (32) being arranged in the outlet neck (34) to which the outlet outlet is connected. a throat (38) of the fan (12) by means of a length-adjustable duct (40).