UA127463C2 - Double-inlet air extractor - Google Patents

Abstract

The invention relates to an air hood with a double inlet opening, which includes a main body (10) having an upper end (11) with an opening (12) for air intake, a cover (20) located over the upper end (11) of the main body (10) , and a fan-motor assembly (30) placed in the main body (10), where the cover (20) is separated from the opening (12) in the main body (10) by a first distance (D) such that between the cover (20) and an opening (12) in the main body (10) defines a side inlet opening (S) for air intake, and wherein the cover (20) has a central opening (21) which is partially covered by a central cover (40), wherein said central cover (40) ) is separated from the central hole (21) in the cover (20) by a second distance (d) such that a front inlet (F) is defined between the central cover (40) and the central hole (21) in the cover (20) .

Description

The field of technology

The present invention relates to an air extractor designed with a double inlet for air intake to provide efficient and comfortable ventilation conditions in bathrooms, kitchens and similar rooms of residential or commercial premises.

Technical level

To restore stagnant or polluted air in closed rooms, such as bathrooms or kitchens, it is known to use hoods that suck air from inside the room and bring it out through the exhaust duct to which the hoods are attached.

Air hoods include a main body housing a fan-motor assembly for sucking in the air to be exhausted, and a cover that is positioned over the upper end of the main body, closing it at said end. See, for example, the document

EP181672881 or document EP201241281.

The main body of the air extractor has at the upper end an opening for air intake, and the fan of the fan-motor assembly is located approximately in the said opening in the main body, and the main body has a lower end for connection with the exhaust duct. A cover that covers the upper end of the main body has a central opening provided with a grill, said central opening in the cover being aligned with the opening in the main body housing the fan so that air is drawn by the fan from the central opening in the cover to the opening in the main body , to lead it to the exhaust duct.

During the use of the hood, usually dust and other airborne dirt tends to stick to the grill, and since the grill is visible, this results in an undesirable aesthetic appearance of the hood. In addition, hoods are usually located in elevated parts of the room, such as the ceiling or at the top of the wall, in such a way that access to them for cleaning them is particularly difficult, which leads to the fact that they are not cleaned as often as they should be necessary to improve their appearance.

This problem is exacerbated by the dirty conditions of the premises where the hood is placed, and for this reason the grille tends to become dirty after a short time of use.

To solve this problem, for example, there are known air extractors that have a deaf cover without

From the central hole and without grille, in which dust does not accumulate in the visible part of the hood, and thus improves their aesthetic appearance.

These types of hoods have the same configuration as the louvered hoods described earlier, except that the hood does not have a central louvered opening because the hood is located above the main body, but separated by some distance from the main body. Thus, air is drawn in laterally through a clearance between the cover and the main body to direct it to an opening in the main body where the fan is located, which in turn directs the air to the exhaust duct.

Although this solution improves the external aesthetic appearance, the truth is that these types of air hoods have less efficient ventilation conditions than hoods that draw air from the front through the grille of the central opening in the cover.

The subject of the invention

According to the present invention, there is provided an air hood with a double inlet for air intake, which makes it possible to achieve effective ventilation conditions in the rooms that need to be ventilated, in addition to the fact that it has an improved aesthetic appearance, since dirt does not accumulate on the visible part of the hood.

The proposed dual inlet air hood of the present invention includes: - a main body having an upper end with an air inlet opening, - a cover located above the upper end of the main body, and - a fan-motor assembly located in the main body, wherein the fan the fan-motor assembly is located in the air intake opening from the main body.

On the one hand, the cover is separated from the opening at the upper end of the main body by a first distance such that a side air intake opening is defined between the cover and the opening at the upper end of the main body for conducting air from the side intake opening to the opening at the upper end of the main body .

On the other hand, the lid has a central opening which is partially closed by the central lid, the central lid being separated from the central opening in the lid by a second distance such that a front air intake opening is defined between the central lid and the central opening in the lid for conducting air from of the front 60 inlet to the opening in the main body.

Thus, the hood allows for the installation of a double air inlet, a side inlet defined between the cover and the main body, and a front inlet defined between the cover and the central cover, which improves the ventilation conditions of the air hood.

The location of the side air inlet in relation to the opening in the main body causes the airflow to make a turn to be directed towards the opening, which can create collisions and turbulences that affect the air extraction performance; however, the front air inlet helps to direct such air flow that enters through the side inlet, facilitating circulation in such a way that said collisions and turbulence are reduced.

In addition, the central cover is located in such a way that it partially covers the central opening in the cover, through which the hood draws air from the front, so that the aesthetic appearance of the hood is improved, since there are no visible parts where dirt accumulates, as they are hidden by the central cover.

Accordingly, the air hood that is the subject of this invention has very superior characteristics for the function for which it is intended, acquiring its own application and superior character compared to traditional air hoods used for this function.

Description of figures

Fig. 1 depicts a perspective view of an exemplary embodiment of the air extractor of the present invention.

Fig. 2 shows a side view of the air extractor of FIG. 1.

Fig. C depicts a cross-sectional view of the hood according to the cross-section PI-

IPI indicated in Fig. 2.

Fig. 4 shows a top view of the air extractor of FIG. 1.

Fig. 5 shows another cross-sectional view of the hood according to the cross-section

MU-M indicated in Fig. 4.

Fig. 6 shows a cross-sectional perspective view of the upper end of the main body, cover and center cover.

From Fig. 7 shows a perspective view of the cover from its lower side.

Fig. 1A shows a schematic view of a prior art hood with a front air intake opening.

Fig. BA shows a schematic view of a prior art hood with a side inlet (5) for air intake.

Fig. 8C is a schematic view of the hood of the present invention with a side air inlet and a front air inlet.

Detailed description of the invention

Fig. 1 shows an embodiment of an air extractor for ventilation of bathrooms, kitchens or similar rooms in residential or commercial premises.

The air extractor includes a main body (10), a cover (20) that is located above the main body (10), and a fan-motor assembly (30) that is placed inside the main body (10).

The main body (10) has an upper end (11) with an opening (12) through which the fan-motor assembly (30) draws air, and a lower end (13) opposite the upper end (11) for connection of the main body (10) with an exhaust duct for air (not shown).

A fan of the fan-motor assembly (30) is located in an opening (12) in the upper end (11) of the main body (10) to cause air to be admitted through the opening (12).

The opening (12) in the upper end (11) of the main body (10) has a grill (14) to protect against possible user contact with the fan-motor assembly (30) if the cover (20) is removed during the operation of the hood.

The operating electronics of the hood are located in the upper end (11) of the main body (10).

The cover (20) has a central opening (21), and the central opening (21) in the cover (20) is partially covered by the central cover (40).

On the other hand, the cover (20) is separated from the opening (12) at the upper end (11) of the main body (10) by a first distance (0) such that a side inlet (5) is defined for air intake, while on the other hand, the central cover (40) is separated from the central opening (21) in the cover (20) by a second distance (4) so that a front inlet (E) for air intake is defined.

In this configuration, a double inlet is installed for the intake of air in the hood. because Thus, the fan of the fan-motor assembly (30) located in the hole (12) in the main body (10) on the one hand draws in air to direct it from the side intake hole (5) for air intake to the hole ( 12) in the main body (10), and on the other hand, the fan also draws in air to direct it from the front air inlet (PE) to the front opening (21) in the cover (20) and from there to the opening (12 ) in the main body (10), with all the air drawn in eventually exiting through the air exhaust duct which is connected to the lower end (13) of the main body (10).

The hole (12) in the main body (10) and the central hole (21) in the cover (20) are aligned relative to each other, and the central cover (40) is aligned with respect to both the holes (12,21) in the main body (10) and the cover (20). Thus, the central cover (40) is positioned to obstruct the front view of the grill (14), which covers the opening (12) in the main body where dirt can accumulate.

Thus, the imaginary axis that passes through the center of the hole (12) in the main body (10) and the imaginary axis that passes through the center of the central hole (21) in the cover (20) are coaxial, and the imaginary axis that passes through the center of the central cover (40), is equally aligned relative to the axes of both holes (12,21) in the main body (10) and in the cover (20).

The central cover (40) has an outer dimension that is equal to or smaller than the inner dimension of the central opening (21) in the cover (20). In other words, the vertical projection of the central cover (40) is equal to or less than the vertical projection of the central opening (21). This allows the flow coming through the front air inlet (E) to follow a direction as straight as possible to the opening (12) in the main body (10), as seen in the cross section of FIG. 5.

The hood additionally includes connection means (15,16,22,23) for establishing a removable connection between the cover (20) and the upper end (11) of the main body (10). Thus, the cover (20) can be removed from the main body (10) to facilitate the cleaning task when necessary.

Preferably one (16, 23) of the connecting means (15, 16, 22, 23) has a different shape than the other connecting means (15, 22) in order to carry out an unambiguous installation of the cover (20) on the main body (10) ).

Other means of connection (16,23) are additionally used to place the light indicator of the working state of the hood.

З The central cover (40) is connected to the cover (20) with the help of supports (24).

The supports (24) have a plate configuration with a thinner cross-section that faces the front intake port (E) for air intake. Thus, the supports (24) provide minimal resistance to the passage of air, thereby reducing the possible noise that may be generated.

The supports (24) are located in positions that are diametrically opposite and equidistant from each other, and each of the supports (24) is located in the center of one of the sides of the cover (20).

The cover (20) and the central cover (40) are made in the form of a single part, which is preferably obtained by injection molding of plastic material.

The cover (20) has a dome-shaped area (25) on the periphery of the central opening (21), which allows to direct the flow of air that enters through the front inlet opening (ER) for air intake.

The shape and location of the supports (24) are specially designed to optimize injection molding and ensure a good flow of plastic material during molding.

It was experimentally established that the air extraction conditions improve for the predominant sizes of the first and second distances (0, a), which provide double air intake. Thus, the first separation distance (0) between the cover (20) and the opening (12) at the upper end (11) of the main body (10) is preferably 10-20 mm, and the second separation distance (4) between the central cover (40) and the central hole (21) in the cover (20) is preferably 5-10 mm.

As shown by the arrows in the figures, the preferred dimensions of the first and second distances (0, a) mentioned earlier are the dimensions measured vertically from one side of the central cover (40) and the cover (20), respectively.

In any case, the clearance between the cover (20) and the opening (12) and the clearance between the central cover (40) and the central opening (21) may be a clearance in the vertical direction, as shown in the exemplary embodiment of the figures, or it may be a clearance in a horizontal direction, or through a clearance in an inclined direction, without changing the concept of the invention to create a double air inlet with a central cover (40), which prevents the existence of visible parts of the hood in which dirt accumulates.

Preferably, the cover (20) has a concave shape such that the first distance (0) by which the cover (20) is separated from the opening (12) in the main body (10) is variable along the cover

(20), and the first distance (0) has a central section with a maximum clearance (Utah) between the cover (20) and an opening (12) in the main body (10) and end sections with a minimum clearance (Otip) between the cover (20) and hole (12) in the main body (10).

Preferably, the central cover (40) also has a concave shape such that the second distance (4) by which the central cover (40) is separated from the central opening (21) in the cover (20) is also variable along the central cover (40). Thus, the second distance (a) also has a central section with a maximum clearance between the central cover (40) and the central hole (21) in the cover (20) and end sections with a minimum clearance between the central cover (40) and the central hole (21) in the cover (20).

As can be seen in the exemplary embodiment shown in Fig. 1-7, the main body (10) has a predominantly cylindrical configuration, while the upper end (11) of the main body (10), the cover (20) and its central opening (21), as well as the central cover (40), have a predominantly square configuration. In any case, the square configuration is not limiting, the central cover (40) and/or the cover (20) can have other types of shape without changing the concept of the invention, such as, for example, another polygonal shape with at least three sides or a circular shape.

According to the said preferred exemplary embodiment, the upper end (11) of the main body (10), the cover (20), its central opening (21) and the central cover (40) have four sides respectively, and the sides of each of said parts (11, 20,21,40) hoods are approximately parallel to each other.

As can be seen in detail in Fig. 3, 5 and 7, there are four supports (24) that connect the central cover (40) to the cover (20), each of the supports (24) being located in the center of one of the sides of the cover (20), and a thinner transverse cross-section of the plate configuration of the support (24) facing the front air inlet (E).

As shown in detail in Fig. With and 5, the connection means (15,16,22,23) between the cover (20) and the main body (10) include projections (15,16) located at the upper end (11) of the main body (10) and sockets (22,23), located on the inside of the cover (20).

As shown in Fig. 5, between the protrusions (15,16) and the sockets (22,23) a stepped section is installed in order to establish a limiter for inserting the protrusions (15,16) into the sockets (22,23).

In particular, and, as shown in the exemplary embodiment shown in the figures, are removable

The connection means include three protrusions (15) and three sockets (22) with one shape, as well as one protrusion (16) and one socket (23) with a different shape in order to ensure unambiguous installation.

As shown in Fig. 5, the projection (16) and the socket (23) with a different shape are open from the inside to allow the passage of the light guide of the light indicator.

As shown in fig. 1 and 2, each of the four sides of the cover (20) has a radius of curvature with a concave shape such that the first distance (0) that each side of the cover (20) is separated from the main body (10) is variable along the side of the cover (20). Each side of the cover (20) has a maximum clearance (UOtah) in the center of said side and has a minimum clearance (Otip) at the ends of said side. The radius of curvature of the sides of the cover (20) ensures the formation of a maximum clearance in the position close to the hole (12) in the main body (10), through which air is drawn in, while the minimum clearance is formed in the positions furthest from the hole (12).

Preferably, the radius of curvature of each side of the cover (20) is 300-450 mm.

Also, as shown in Fig. 1 and 2, each of the four sides of the central cover (40) has a radius of curvature with a concave shape such that the second distance (4) by which each side of the central cover (40) is separated from the cover (20) is variable along the side of the central covers (40). Each side of the central cover (40) has a maximum clearance in the center of said side and has a minimum clearance at the ends of said side. As previously described, the radius of curvature of the sides of the central cover (40) allows for the formation of a maximum clearance in a position close to the opening (12) in the main body (10), through which air is drawn in, while the minimum clearance is formed in the most distant from the opening (12 ) provisions. For clarity in the figures, references to the maximum and minimum clearances between the central cover (40) and the cover (20) are not shown in the figures.

Preferably, the radius of curvature of each side of the central cover (40) is 300-450 mm.

Even more preferably, the radius of curvature of each side of the cover (20) and the central cover (40) is the same so that a constant curvature is maintained between the cover (20) and the central cover (40), which improves the aesthetic appearance of the hood.

Fig. 8A, 88 and 8C show a comparison of the direction followed by the exhaust air flow in three air hoods. Fig. BA shows a prior art hood with a front inlet (ER) for air intake, FIG. 8B shows a prior art hood with a side inlet (5) for air intake, and FIG. 8C shows a hood according to the present invention with a side inlet (5) for air intake and a front inlet (P) for air intake.

The hood in Fig. BA has a front cover that has openings and air is drawn in according to the direction that is coaxial with the fan shaft, passing through the protective grid, while the hood of Fig. The 88 has a smooth front cover that doesn't have any holes, so the air is drawn in from the side, through the four sides of the hood.

Hood Fig. BA has the disadvantage that it is not very aesthetic, as it leaves the grille and fan visible; moreover, the dirt that usually sticks to them is difficult to remove due to the mismatched shapes of the two. However, it has the advantage that the air flow is continuous, without changes in direction, resulting in high aerodynamic efficiency.

Hood Fig. 8B has the advantage that it does not get dirty, and even if it does, because the front cover is smooth, it is very easy to clean. However, it has the disadvantage of lower performance than the hood of Fig. 8A. Indeed, the four streams of air enter through the four sides in a direction perpendicular to the direction of the outlet opening, which causes the air to make a 90" turn, moreover, when the four streams enter in opposite directions two by two, they collide with each other inside the hood just below the cover, creating turbulence, more noise and reduced exhaust flow and pressure characteristics due to such collision and such turbulence.

The hood according to the invention (see Fig. 8) combines the advantages of the hoods of Fig. 8A and 88 without any of their shortcomings. The cover (20) has a central opening (21), which is partially blocked by the central cover (40) in such a way that air passages are created between them (in the case of rectangular shapes) with dimensions calculated to create a forward air flow (P) (dashed lines) with an air velocity sufficient to help the four lateral air currents (5) (solid line) to make a 90" turn, thus preventing a collision between them. The effect of this forward flow (P) is to "orientate" the lateral flows ( 5), is that the aerodynamic performance of the hood of the present invention is similar to that of the hood of Fig. 8A, while the tendency to not get dirty and the ease of cleaning is similar to the hood of Fig. 88.

Claims (5)

30 FORMULA OF THE INVENTION 1. An air hood with a double inlet opening, characterized in that it comprises: a main body (10) having an upper end (11) with an opening (12) for air intake, a cover (20) which is located over the upper end ( 11) of the main body (10), and 35 the fan-motor unit (30), which is placed in the main body (10), and the fan of the fan-motor unit (30) is located in the hole (12) for air intake from the main body (10 ), and where: the cover (20) is separated from the opening (12) in the upper end (11) of the main body (10) by a first distance (0) such that between the cover (20) and the opening (12) in the upper end ( 11) of the main body 40 (10), a side air intake hole (5) is defined for conducting air from the side air intake hole (5) to an opening (12) at the upper end (11) of the main body (10), and where the cover (20 ) has a central opening (21) which is partially covered by a central cover (40), and the central cover (40) is separated from the central opening (21) in the cover (20) by a 45 second distance (4) such that between the central cover ( 40) and the central opening (21) in the cover (20) defines the front air intake opening (P) for conducting air from the front intake opening (E) to the opening (12) in the main body (10). 2. Hood according to the preceding claim, characterized in that the central cover (40) has an outer dimension that is equal to or smaller than the inner dimension of the central opening (21) 50 in the cover (20). 3. A hood according to the preceding claim, characterized in that it further comprises connection means (15, 16, 22, 23) to establish a removable connection between the cover (20) and the upper end (11) of the main body (10) ). 4. Hood according to the previous point, which is characterized in that one (16, 23) of the connecting means 55 (15, 16, 22, 23) has a different shape than the other connecting means (15, 22) so that carry out unambiguous installation of the cover (20) on the main body (10). 5. Hood according to the previous point, which differs in that the means of connection (16, 23), having a different shape, place a light indicator of the hood's operating state. 6. A hood according to any of the previous items, which is characterized in that the central cover (40) is connected to the cover (20) by means of supports (24). 7. Hood according to the previous claim, characterized in that the supports (24) have a plate configuration with a thinner cross-section, which faces the front inlet (E) for air intake. 8. Hood according to claim 6 or 7, which is characterized by the fact that the supports (24) are located in positions that are diametrically opposite and equidistant from each other, and each of the supports (24) is located in the center of one of the sides of the cover (20). 9. A hood according to any of the preceding claims, characterized in that the opening (12) in the main body (10) and the central opening (21) in the cover (20) are aligned relative to each other, and the central cover (40) is aligned relative to both holes (12, 21). 10. Hood according to any one of the previous items, characterized in that the cover (20) has a dome-shaped area (25) on the periphery of the central opening (21). 11. Hood according to any one of the preceding items, characterized in that the first separation distance (0) between the cover (20) and the opening (12) in the upper end (11) of the main body (10) is 10-20 mm. 12. Hood according to any one of the previous items, characterized in that the second separation distance (4) between the central cover (40) and the central opening (21) in the cover (20) is 5-10 mm. 13. Hood according to any one of the previous items, characterized in that the cover (20) has a concave shape such that the first distance (0) has a central area with a maximum clearance (ХОtah) between the cover (20) and the opening (12) ) in the main body (10) and the end sections with a minimum clearance (Otip) between the cover (20) and the hole (12) in the main body (10). 14. Hood according to any one of the preceding claims, characterized in that the central cover (40) has a concave shape such that the second distance (4) has a central area with maximum clearance between the central cover (40) and the central opening (21) ) in the cover (20) and end sections with minimal clearance between the central cover (40) and the central opening (21) in the cover (20). 20 48 / zi your district but still s and with as without OO ITO0o en, 7 de v. and I oh V. t v t ee this i - Fe yiv I Zh o r Chi 17: for FIG shx show Х cm SAM ож I ех ХХ Х put іх Х х BU х х Х х KZ Х х зани и КZ I M Ж ; M: In x ; Khh B B bozh knin y m 00 VOK uh h o i s pe o OK sh 2" g de kore 1 th KK oo Ko NY Oh, h roko VVNO ZON Ko ne tv ! : I want to be OK. хх ХМ dk oo vro non s kn ny uma VV A OK udo yh Z o NK KO M 00 Live Z er OKA s ee VOD i o ke ih i Ii ih t i 13 Zhanny duh Mn Sche sh Z x hya yi yi E Ki і і і : і і t tk Ппі і : Be Щ : і і Her E Sh і і і і і і Ж і і і ! shchi Zhsh i sbhhuii Zhsh x hih E V So . . she E : : Hm i U i: va I. : : h t y h Fondu nny Mk i ii ii ii ii ii ii ii : DlDUOTT KH ohi Ken i de i KZ i still BU Khozhe ХК mya ha ЖЖ ok oh su cha dok 5 B still a I I OV M y d y y y y SOU ih zhh k 5 y Х I OO ots sce z KO Kn Z y ZHE z vy U M B vv ? і у х че ко ОО КК и х 0 om KOKO OK ok KOH x KK VE x nn m KO xx oh oh S ese i I y km, sakzh OMA 7 M x KK KK OP Zhuh UNkhh z ve che oo ek ZK vs Pezhenu xxx s x Kk KVU He n ; oh oon still EN ekyu and izhe Z bek -- and; ate 7 orduusosoooooooo o V OO U KE VO ni khookiyuya o osev iyi kv M M NN KA SHCHI shih u. 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