Mounting element for fastening of mechanical fan in roof ventilation device and roof ventilation device

Abstract

The subject-matter of the present invention is a mounting element for fastening of a mechanical fan for a roof ventilation device, comprising a central section (3) with a mounting socket (7) and mounting holes (8), an annular section (1) surrounding the central section (3) and guide vanes (2) connecting the central section (3) to the annular section (1).

Description

Technical Field

[0001] The invention generally belongs to the field of ventilation systems. More specifically, the invention relates to a mounting element for fastening of a mechanical fan for a roof ventilation device and a roof ventilation device. The invention is mainly used in mechanical ventilation systems for the discharge of used air.Background art

[0002] Various types of roof ventilation devices are known in the art, such as roof fans or ventilation chimneys, which serve to forcibly remove air from rooms and buildings. These devices are equipped with exhaust fans comprising an electric motor and a rotary element (impeller) with vanes.

[0003] Polish patent PL230891B1 discloses a hybrid chimney cowl having a turbine driven by a motor, attached to a base configured for attachment to a chimney, in which the rotor of the motor is rotatably fastened on the axis and the turbine is attached to the rotor.

[0004] The European patent application EP2649380A1 discloses a ventilation chimney comprising an exhaust pipe of a ventilation duct, a hat with a conical cup and an electric motor and an exhaust fan mounted below the conical cup of the hat.

[0005] There is a lack of multifunctional solutions which, in addition to providing support for a mechanical fan, would also fulfil other functions.Summary of the invention

[0006] The aim of the invention is to develop a solution that will provide support for a mechanical exhaust fan while simultaneously ensuring the stabilization of air flow by eliminating turbulences and unevenness in the air stream.

[0007] According to a first aspect of the invention, there is provided a mounting element for fastening of a mechanical fan for a roof ventilation device, comprising: a central section with a mounting socket and mounting holes, an annular section surrounding the central section, guide vanes that connect the central section to the annular section.

[0008] In one preferred embodiment, the guide vane is made up of two parallel surfaces, a concave one and a convex one.

[0009] In another embodiment, the guide vane can be made up of two flat surfaces parallel to each other.

[0010] In yet another embodiment, an angle of inclination of the guide vane is in the range 30 °< - 60 °< , and preferably it is 45.5 °< .

[0011] The mounting element may comprise at least four guide vanes, preferably it comprises eight guide vanes.

[0012] The guide vanes can be spaced equidistantly from each other around the axis of the annular section.

[0013] In yet another embodiment, the central section is in the shape of a circular plate or a disk.

[0014] In yet another embodiment, the annular section has on its outer surface an axially extending guide wedge that cooperates with a guide groove formed in an inner surface of a housing.

[0015] The mounting element preferably comprises a cable grommet comprising an opening in the annular section with a trough downwardly directed and configured to accommodate an electric cable providing power supply to an electric motor.

[0016] In yet another embodiment, the central section comprises at least two fastening elements configured to attach further parts of a roof ventilation device, preferably a cover of a fan impeller.

[0017] The mounting element can be preferably made of plastic or metal.

[0018] In one embodiment, a mounting box is provided on the upper side of the central section, comprising a mounting space for electrical / electronic components, a gasket and a cover.

[0019] According to a second aspect of the invention, there is provided a roof ventilation device comprising a housing, a mechanical fan, a dome and a mounting element attached to the mechanical fan from above.

[0020] In one embodiment, the housing comprises support points on the inner side for positioning the mounting element relative to the housing and the dome.

[0021] In another embodiment, the housing comprises a support tab that cooperates with a snap-fit opening in the side surface of the dome.Advantageous effects of the invention

[0022] A mounting element according to the invention simultaneously acts as a guide, which appropriately directs the flowing air, a frame for the mechanical fan and a mounting box for the elements of a roof ventilation device.

[0023] The mounting element provides support for a mechanical fan, keeping it at an appropriate distance from the mounting surface and providing the necessary stability. It ensures that the mechanical fan is installed safely and reliably, preventing vibrations and falling out of position, which could lead to damage to the ventilation system or create a hazard for users.

[0024] The mounting element facilitates the installation and maintenance of the ventilation system, for example by providing access to mounting screws or other mounting elements.

[0025] By using special guide vanes, the mounting element acts as an air guide, which ensures stabilization of the air flow by eliminating turbulences and unevenness in the air stream. By properly setting the guide vanes, it is possible to control the speed and pressure of the air entering the roof ventilation device. Such a solution affects the efficiency and effectiveness of the ventilation chimney.Brief description of the drawings

[0026] The invention will be presented below with reference to the attached drawings, wherein: Fig. 1 - shows a mounting element according to the invention in a bottom view, Fig. 2 - shows a mounting element according to the invention in a side view, Fig. 3 - shows an exploded view of a mounting element from above with a mounting box and electrical / electronic components, Fig. 4 - shows a housing of a roof ventilation device that forms its base, Fig. 5 - shows a roof ventilation device in an exploded view along with a mounting element according to the invention. Detailed description of preferred embodiments of the invention

[0027] Technical aspects of a mounting element for fastening of a mechanical fan to a roof ventilation device, also called a roof fan or a ventilation chimney, according to one of the preferred embodiments will be explained with reference to Figs. 1-3.

[0028] A mounting element comprises a central section 3 with a mounting socket 7 on the bottom side and fastening holes 8, an annular section 1 surrounding the central section 3 and guide vanes 2 which connect the central section 3 to the annular section 1. The central section 3 has the shape of a circular plate or a disc. The annular section 1 is in the form of a rim. The axis of the central section 3 is located in the axis of the annular section 1. The guide vanes 2 connect the central section 3 to the annular section 1 in an inseparable manner.

[0029] The guide vane 2 is made up of two surfaces parallel to each other, i.e. a concave one and a convex one. It is also possible to use guide vanes 2 made up of two flat surfaces that are parallel to each other. In addition, the guide vane 2 is inclined at an angle α in the range of 30°-60°. It is particularly advantageous when the angle of inclination α is about 45.5°, because it provides an optimal balance between effectiveness and efficiency. With such an angle, the guide vanes 2 effectively convert the energy of the air flow into the exhaust movement, while simultaneously minimizing aerodynamic losses. This value allows for obtaining high lift and torque, which makes this angle ideal for this application, where the balance between driving force and resistance is crucial. The use of bevelled inlet and outlet edges of the guide vanes 2 can additionally improve their aerodynamic properties by reducing turbulences at the ends of the vanes, which reduces energy losses and noise, and also minimizes the risk of phenomena such as air swirl. This solution also increases tbhe durability of the guide vanes 2 by reducing the stress on their edges and improves the stability and smoothness of the air flow in the entire system.

[0030] The mounting element preferably contains eight guide vanes 2, but their number may be different, for example, four, five, six, ten. The guide vanes 2 are spaced equidistantly from each other around the axis of the annular section 1, which is thus the axis of the central section 3 and the axis of the mounting element. The guide vanes may also be spaced unevenly or irregularly. The task of the guide vanes is to ensure the stabilization of the air flow by eliminating turbulences and unevenness in the air stream. This ensures even operation of the entire ventilation system. By appropriately setting the guide vanes 2, it is possible to control the speed and pressure of the air entering the roof ventilation device - this directly affects the efficiency and effectiveness of the device. The guide vanes 2 may also act as cooling elements, guiding the cooling air to the place where the mechanical fan is located, in order to maintain the optimal operating temperature.

[0031] The mounting socket 7 of the central section 3 comprises fastening holes 8 for fastening of the mechanical fan 12. Depending on the type and model of the mechanical fan 12, the fastening holes 8 are arranged in the mounting socket 7 in such a way that they correspond to the given model of the mechanical fan 12, therefore their number and spacing may vary.

[0032] In the mounting socket 7 there is preferably a shaped recess 9 in a circular shape intended for mounting the mechanical fan 12. Depending on the type and model of the fan 12, the recess 9 may have a different diameter and may be arranged so as to fit the given model. It is obvious that the recess may also have a shape other than circular, e.g. rectangular.

[0033] The annular section 1 preferably has cut-outs 4 in its upper edge, as can be seen in Fig. 1, where each cut-out is located between the two guide vanes 2. The cut-outs 4 are the location for a snap-fit joint for connecting a housing 13 to a dome 10. For this purpose, the housing is provided with a special support tab 23, preferably L-shaped, as can be seen in Fig. 4, which cooperates with a snap-fit opening in the side surface of the dome 10. In Fig. 5, two such snap-fit openings can be seen in the lower ring of the dome 10.

[0034] The annular section 1 preferably has a cable grommet 5, which can be clearly seen in Fig. 1-3. The cable grommet 5 comprises an opening in the annular section 1 with a trough facing downwards. The cable grommet 5 is used to route an electric cable providing power supply to the electric motor of the fan 12. The cable grommet 5 is aligned with the cable opening 22 made in the internal flange of the housing 13. After assembling all the components of the roof ventilation device, a uniform and tight wiring duct is created, which provides protection of the cables against external factors, such as moisture, dust or mechanical damage. By hiding the wires inside the duct, the risk of them getting tangled or accidentally damaged is eliminated, and the whole thing maintains a consistent and neat appearance. The wiring duct also facilitates installation and servicing by providing quick access to the cables.

[0035] The central section 3 acts also as a mounting box, shown in Fig. 3, for mounting electrical / electronic components 18, which are placed in the mounting space 16 located on the upper side of the central section 3. The electrical / electronic components 18 are protected by a cover 19 attached to the central section 3 by means of screws and mounting tags 6 with threaded holes arranged around the circumference of the central section 3. For protection against weather conditions (such as rain, snow or moisture), a gasket 17 is preferably fitted between the edge of the mounting space 16 and the edge of the cover 19.

[0036] The mounting element can be made of, for example, plastic or metal. As material, most preferably used are plastics with high mechanical resistance or metals with increased stiffness, which ensure reliable attachment of the mechanical fan regardless of its size or weight.

[0037] Fig. 5 shows an exploded view of an exemplary implementation of a roof ventilation device comprising a housing 13 (base), a mechanical fan 12, a mounting element 11 and a dome 10. Preferably, exhaust fans with axial flow are used, which ensure effective exhaust of the used air. Typically, such a fan comprises a centrally located electric motor with an impeller equipped with a set of vanes arranged around the impeller. The mounting element 11 is attached to the mechanical fan 12. The unit thus assembled is inserted from above into the housing 13 with the fan 12 downward and secured to said housing 13. Then the dome 10 with rings is mounted from above.

[0038] With reference to Figs. 4, in order to ensure an appropriate mounting distance of the mounting element 11 between the housing 13 and the dome 10, the housing 13 may be equipped with support points 21, which determine the position of the components of the roof ventilation device. The support points 21 are arranged on the entire circumference of the inner surface of the housing 13. Additionally, the housing may include a guide wedge 20 that cooperates with a guide groove 15 made in the outer surface of the annular section 1. The guide wedge 20 and the guide groove 15 ensure precise positioning of the mounting element 11. At the same time, they minimize the risk of incorrect positioning and displacement of the mounting element 13 relative to the housing 13.

[0039] By ensuring an appropriate mounting distance, the mechanical fan 12 does not come into contact with any element during operation, which eliminates the risk of friction and damage. Keeping the impeller of the mechanical fan 12 at an appropriate distance ensures free air flow so that the mechanical fan 12 can effectively generate flow in the working area.

Claims

1. A mounting element for fastening of a mechanical fan for a roof ventilation device, comprising: a central section (3) with a mounting socket (7) for mounting the mechanical fan (12) and with mounting holes (8), an annular section (1) surrounding the central section (3), characterized in that the mounting element comprises guide vanes (2) connecting the central section (3) to the annular section (1).

2. The mounting element according to claim 1, wherein the guide vane (2) is made up of two parallel surfaces, a concave surface and a convex surface.

3. The mounting element according to either claim 1 or 2, wherein the guide vane (2) is made up of two flat surfaces parallel to each other.

4. The mounting element according to any preceding claim 1 to 3, wherein an angle of inclination (α) of the guide vane (2) is in the range of 30° - 60°, preferably the angle is 45.5°.

5. The mounting element according to any preceding claim 1 to 4, wherein it contains at least four guide vanes (2), preferably eight guide vanes (2).

6. The mounting element according to any preceding claim 1 to 5, wherein the guide vanes (2) are spaced equidistantly from each other around the axis of the annular section (1).

7. The mounting element according to any preceding claim 1 to 6, wherein the central section (3) is in the shape of a round plate or a disk.

8. The mounting element according to any preceding claim 1 to 7, wherein the annular section (1) has on its outer surface an axially extending guide wedge (15) cooperating with a guide groove (20) formed in an inner surface of a housing (13).

9. The mounting element according to any preceding claim 1 to 8, wherein it comprises a cable grommet (5) comprising an opening in the annular section (1) with a trough being downwardly directed and configured to accommodate an electric cable providing power supply to an electric motor of the mechanical fan (12).

10. The mounting element according to any preceding claim 1 to 9, wherein the central section (3) comprises at least two fastening elements (6) configured for connecting further components of a roof ventilation device, preferably a cover of an impeller of the mechanical fan (12).

11. The mounting element according to any preceding claim 1 to 10, wherein it is made of plastic or metal.

12. The mounting element according to any preceding claim 1 to 11, wherein a mounting box is provided on an upper side of the central section, comprising a mounting space (16) for electrical / electronic components (18), a gasket (17) and a cover (19).

13. A roof ventilation device comprising a housing (13), a mechanical ventilator (12) and a dome (10), wherein a mounting element (11) according to any claim 1 to 12 is attached from above to the mechanical fan (12).

14. The roof ventilation device according to claim 13, wherein the housing (13) comprises support points (21) on the inner side for positioning the mounting element (11) relative to the housing (13) and the dome (10).

15. The roof ventilation device according to either claim 13 or 14, wherein the housing (13) comprises a support tab (23) which cooperates with a snap-fit opening in the side surface of the dome (10).

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