RU2498165C2 - Centrifugal fan exhauster for bathroom - Google Patents

Abstract

FIELD: ventilation.

SUBSTANCE: centrifugal fan exhauster for bathrooms, comprising an outer casing and an inner casing between which the air passage is formed from the inlet of the front part to the rotating drum, which is located transversely inside the inner casing, which is located partly inside the air exhaust tubular nozzle at the rear part, so that the rotating drum is shifted at least partly relative to the plane of placing of the fan exhauster in the unit of application.

EFFECT: while maintaining the performance characteristics of a centrifugal fan, it takes enough little space in a closed room where it is used as the fan exhauster housing protrudes slightly from the surface where it is mounted.

Description

Technical field

The invention relates to devices for exchanging the internal air of rooms for enclosed spaces, for example, in order to eliminate odors in bathrooms, by offering a centrifugal exhaust fan with features that make it preferred for said function.

Description of the Related Art

To update stale or contaminated air in enclosed spaces, exhaust devices are used that draw in air inside the enclosed space and throw it out through the exhaust pipe.

Axial exhaust fan devices having an engine-driven propeller for suction of air to be removed, and centrifugal exhaust fans having an engine-driven cylindrical drum with longitudinal flanges for suction of air to be removed, are known for this function.

Centrifugal exhaust fans are more efficient because they develop a greater force of air movement, but they have the disadvantage that the cylindrical drum with which they move air is transversely in front of the exhaust air outlet channel, converting the exhaust device so that it had a significant distance between the back and the front, such as in places where it is used, as in bathrooms, where the gaps in the enclosed space are usually very An'ichi such exhaust fans are quite impractical, because they take up too much space.

Subject of invention

The invention provides a centrifugal exhaust fan with characteristics that allow it to be installed so that it protrudes quite a bit with respect to the application surface on which it is mounted.

This exhaust fan - the subject of the invention - consists of an outer casing, which forms in the front part an inlet for air to flow inward, and inside the said outer casing there is an inner casing accommodating a rotating drum with longitudinal flanges connected to a drive motor, and the said drum is placed so that opposite its ends are the side holes of the inner casing and it is located transversely with respect to the rear hole formed by the aforementioned the casing, while the outer casing forms a tubular nozzle in the rear portion, in which the inner casing containing the rotary drum is located, said tubular nozzle being formed from the landing plane of the exhaust fan on the installation surface, while the rotary drum is at least partially displaced towards the rear relative to such a landing plane.

Thus, a centrifugal exhaust fan is designed, which, when installed for use, has its own air intake in a mechanism located at least partially inside the exhaust air pipe to which the rear tubular nozzle of the exhaust fan is connected, so that the housing of the exhaust fan protrudes very little from the surface for installation, taking up little space indoors where it is used.

The inner casing of the exhaust fan is placed inside the outer casing with a gap between them on the sides, so that the air entering through the front of the outer casing can pass to the side openings of the inner casing, which are located opposite the ends of the rotating air intake in the drum; the inner casing is further provided with bevels at the edges of the sides to allow air to pass towards said openings opposite the ends of the rotating drum.

As for the side openings of the inner casing, there are made protective visors protruding outward from the said inner casing, so that in the structural assembly of the exhaust fan said protective visors form an overlap between the inner casing and the outer casing at the rear of the side openings of the inner casing, thereby preventing passage air between the negative pressure region in which the air inlets are placed towards the rotating drum and the pressure region you a heavy fan located behind the rotary drum, while at the same time facilitating the inlet of air through the side openings towards the rotary drum, thereby improving the performance of the exhaust fan.

As a result, said exhaust fan, the subject matter of the invention, has very preferred characteristics for the function for which it is intended, having a preferred character and its own personality with respect to traditional exhaust fans of the same application.

Brief Description of the Drawings

Figure 1 shows a perspective view with spaced apart details of an embodiment of a centrifugal exhaust fan - the subject of the invention.

Figure 2 is a side view in section of a centrifugal exhaust fan according to the previous drawing, installed in it.

Figure 3 is a perspective view of an exhaust fan without a front portion of an outer casing.

Figure 4 is a sectional view of an exhaust fan, which shows the layout of the inner casing and the rotating drum relative to the rear tubular nozzle for connection with the air exhaust pipe.

5 is a side sectional view of a layout of a conventional centrifugal exhaust fan relative to a wall for installation, showing how the entire body of said traditional exhaust fan is outside the surface for installation.

On figa, 6B and 6C shows the layout diagrams in which the rotating drum of the centrifugal exhaust fan - the subject of the invention - is in three different positions relative to the wall for installing the exhaust fan.

DETAILED DESCRIPTION OF THE INVENTION

The subject of the invention relates to a centrifugal exhaust fan with a specific application for bathrooms, but which can be generally applied in any type of enclosed space, where the indoor air must be updated.

The proposed centrifugal exhaust fan consists of an outer casing (1), inside of which an inner casing (2) is placed, in which a rotating drum (3) is formed, which is formed by a cylinder with longitudinal flanges, which is placed connected to a drive motor (4).

The outer casing (1) forms an inlet (5) at the front for air to flow inward, while at the rear it forms a tubular air outlet (6).

The inner casing (2) is made of two mating parts, between which a housing is formed, into which a functional unit is formed, formed by a rotating drum (3) with an engine (4) and an electronic printed circuit board (7), said inner casing (2) forming holes (8) on the sides with respect to which the ends of the rotating drum (3) are opposite, while the drum is located transversely in front of the hole (9), forming an inner casing (2) by itself in the rear part.

The outer casing (1) forms in the rear part the landing plane (10) of the exhaust fan in the unit, for example, on the surface (11) of the wall or ceiling, in communication with the air exhaust pipe (12) placed through the surface (11); the tubular nozzle (6) extends towards the rear from such a landing plane (10), with the inner casing (2) partially included in the said tubular nozzle (6) of the rear in the exhaust fan structural unit, as can be seen in FIG. 2, that the rotary drum (3) is moved at least partially relative to said landing plane (10) of the exhaust fan towards the rear.

With this structural arrangement, the exhaust fan can be placed in the installation for use on the surface (11) with a tubular nozzle (6) of the rear part connected to the corresponding air outlet pipe (12), supporting the landing plane (10) at the outer surface (11), so that only a somewhat protruding part of the exhaust fan is located outside the surface (11), overcoming the drawback of traditional centrifugal exhaust fans, in which, as shown in Fig. 5, the entire housing (13) of the aforementioned s exhaust fan is located outside the surface (11) for setting, occupying much space in the closed space applications.

With the proposed exhaust fan, only a part of the exhaust fan housing protrudes from the installation surface (11), and this protruding part depends on the position of the rotating drum (3) relative to the landing plane (10) in the construction of the exhaust fan, so that, depending on the position of the construction site in an installation for using an exhaust fan, the rotary drum (3) can be located from being partially offset relative to the surface (11) for installation, to being completely offset relative but said surface (11), as seen in FIGS. 6A, 6B and 6C.

In this arrangement, the less the rotating drum (3) is offset relative to the installation surface (11), the greater the air intake is achieved by the exhaust fan, but the protruding part of the exhaust fan housing relative to the surface (11) is larger; since the displaced position of the rotary drum (3) increases with respect to the mounting surface (11), a portion of the exhaust fan housing protruding from the mounting surface (11) is reduced, and air intake by the exhaust fan is also reduced.

According to a study conducted for this purpose, it was found that the position at which there is a suitable ratio of air intake by the exhaust fan and the part protruding from the exhaust fan housing when the rotating drum (3) is offset by a fraction of about 80% of its radius, relative to the landing plane (10) of the exhaust fan in the installation unit, without limiting this position.

Between the inner casing (2) and the outer casing (1) there must be a gap (h) in the sides, as can be seen in FIG. 3, so that the air entering through the inlet (5) reaches the holes (8) of the sides of the inner the casing (2) and through them the rotating drum (3), so that, depending on the diameter (D) of the tubular exhaust air nozzle (6), in which the inner casing (2) containing the rotating drum (3) is placed, said gap (h) should be such that 0.16 <h / D <0.30.

In addition, in order for the air entering through the inlet (5) to pass to the regions of said gap (h) between the inner casing (2) and the outer casing (1), the inner casing (2) has bevels (14) at the side edges that allow air to pass through.

On the other hand, with regard to the side openings (8) of the inner casing (2), it is provided that said inner casing (2) has protective visors (15) extending outwardly at the rear of said openings (8), so that said protective visors (15) ) close the gap between the two casings (1 and 2) behind the holes (8), preventing the passage of air between the negative pressure region in which the holes are located (8) and the pressure region located behind the rotating drum (3), as soon as the inlet air towards emusya drum (3) is facilitated through the holes (8), thereby improving performance exhauster.

Claims (5)

1 . A centrifugal exhaust fan for bathrooms, comprising an outer casing (1) and an inner casing (2), between which an air passage is formed between the inlet (5) of the front of the openings (8) of the sides of the inner casing (2), the openings being opposite the ends of the rotary drum (3), which is placed transversely in front of the rear exhaust air hole (9), the outer casing (1) forming a landing plane (10) at the rear for the exhaust fan in the installation of application, from this plane (10) a tubular nozzle ( 6) leaves toward the rear for connection with the air outlet pipe (12), characterized in that the inner casing (2) is partially placed inside the tubular nozzle (6), and the rotating drum (3) is offset at least partially from the plane ( 10) landing of the exhaust fan, towards the rear. 2. Centrifugal exhaust fan according to claim 1, characterized the fact that the rotating drum (3) is located in a position in which it is offset by about 80% of its radius relative to the plane (10) of the landing of the exhaust fan in the installation site. 3. Centrifugal exhaust fan according to claim 1, characterized the fact that the inner casing (2) is made with a gap (h) relative to the outer casing (1) in the side regions with a ratio of said gap (h) with respect to the diameter (D) of the air outlet tubular nozzle (6) such that 0.16 <h / D <0.30. 4. A centrifugal exhaust fan according to claim 1, characterized in that the inner casing (2) forms protective visors (15) from the outside at the rear of the side openings (8), said protective visors (15) closing the gap between the said inner casing (2) ) and the outer casing (1), preventing the passage of air between the negative pressure area and the pressure area in the exhaust fan. 5. Centrifugal exhaust fan according to claim 1, characterized the fact that the inner casing (2) has bevels (14) at the lateral edges to allow air to pass from the inlet (5) towards the holes (8) of the sides of said inner casing (2).

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