CN220816003U - Ceiling embedded type ventilator - Google Patents

Abstract

The utility model discloses a ceiling embedded ventilator, comprising: a frame; the multi-wing centrifugal fan, the snail shell, the fan blades and the motor are arranged in the snail shell, the snail shell comprises an upper snail shell plate, a lower snail shell plate, a tongue part, a coiled plate and an air inlet, and the coiled plate is provided with an air path which is slightly round from the tongue part to the rotation direction of the fan blades; the wind shield is arranged on the inner side of the fan blade, is provided with a bending piece which is bent from the opposite direction of the rotation of the fan blade to the inner side direction far away from the fan blade, and is positioned in the range of 0-150 degrees from the connecting line of the center of the fan blade and the air outlet direction of the air outlet to the clockwise direction. The wind shield is arranged in the middle of the airflow pressure of the air passage, so that the airflow pressure is forced to move forwards, the highest static pressure in the whole air passage is increased, and when the static pressure in the air passage is large enough, the static pressure of a pipeline communicated with the outside can be resisted, so that all air quantity is forced to flow to the pipeline without backflow.

Description

Ceiling embedded type ventilator

Technical Field

The utility model relates to the technical field of ventilator, in particular to a ceiling embedded ventilator.

Background

As shown in fig. 1A and 1B, a ceiling-embedded ventilator without a wind deflector according to the prior art is schematically shown. The ceiling embedded ventilator 1 comprises a frame 2, fan blades 3 and a snail shell 4 arranged in the frame 2; the snail shell 4 comprises a shell 41, an air inlet 42 and an air outlet 43; the fan blade 3 is disposed in the housing 41 so as to be perpendicular to the rotation axis, and when the fan blade 3 rotates, the air sucked from the air inlet 42 is discharged to the outside through the air outlet 43. Since such a ceiling-embedded ventilator is not provided with a wind deflector, a part of wind is not easily discharged from the air outlet when the static pressure is high, and thus a backflow is formed at the air outlet, and the wind may be reversely cut, thereby generating a harshness abnormal sound.

In order to solve the above-mentioned problems, a ceiling-embedded ventilator with a wind deflector is provided in application No. 20120068259. X, and the wind deflector is provided at a position facing the tongue inside the blade of the multi-blade centrifugal fan. However, since the multi-wing centrifugal fan is a static pressure type fan, it is effective to provide the fan at a position where the tongue is opposed to each other, but it is not suitable for an air volume type fan. That is, the air volume of the air volume type fan is large, and after the return air volume is accumulated by a certain amount, the wind shield is broken through, so that the return air is generated around the baffle plate, and abnormal noise is generated.

Disclosure of utility model

In order to solve the above problems, the present utility model provides a ceiling embedded ventilator, in which a wind shield is installed at the middle of the airflow pressure of a wind path to force the airflow pressure to move forward, thereby increasing the highest static pressure in the whole wind path, and when the static pressure in the wind path is large enough, the static pressure of a pipeline communicated with the outside can be resisted, thereby forcing the whole air flow to the pipeline without backflow.

The utility model provides a ceiling embedded ventilator, comprising: a frame; the multi-wing centrifugal fan is provided with a snail shell, fan blades and a motor, wherein the fan blades and the motor are positioned in the snail shell, the fan blades and the rotating shaft are vertically arranged in the snail shell, the snail shell comprises an upper snail shell plate, a lower snail shell plate, a coiled plate which forms a peripheral wall between the upper snail shell plate and the lower snail shell plate and is connected with a tongue part and an air outlet of the multi-wing centrifugal fan, and an air inlet is arranged at the snail shell, and the coiled plate is provided with an air path which is slightly round from the tongue part to the rotating direction of the fan blades; the wind shield is arranged on the inner side of the fan blade, is provided with a bending piece which is bent in the opposite direction of the rotation of the fan blade and in the inner side direction far away from the fan blade, and is positioned in the range of 0-150 degrees in the clockwise direction from the connecting line of the center of the fan blade and the air outlet direction of the air outlet.

Further, the wind deflector may be detachable or the wind deflector may be integrally formed with at least a portion of the snail shell.

Further, the arc length of the wind deflector is 52mm.

Further, the wind shield is perpendicular to the surface of the air inlet.

Further, the wind shield and the surface of the air inlet have a certain included angle.

Further, the included angle between the wind shield and the surface of the air inlet of the snail shell is 0-30 degrees.

Further, the minimum distance between the wind shield and the fan blade is not smaller than 5mm.

Further, the wind shield extends to a certain length along the edge of the air inlet towards the fan blade.

Further, the length of the wind shield extending along the edge of the air inlet towards the direction of the fan blade is four fifths of the length of the fan blade.

Further, a reinforcing rib is arranged on the inner side of the wind shield, and protrudes towards the center of the fan blade.

Drawings

FIG. 1A is a schematic diagram of a prior art ceiling-embedded ventilator in a bottom view;

FIG. 1B is a schematic diagram of a prior art ceiling-embedded ventilator in a top view;

FIG. 2 is a schematic view of a position of a wind deflector in a ceiling-embedded ventilator according to an embodiment of the present utility model;

FIG. 3 is a side cross-sectional view of a ceiling-embedded ventilator according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a wind deflector with an inclined angle according to an embodiment of the present utility model;

FIG. 5 is a cross-sectional perspective view of a ceiling-embedded ventilator according to an embodiment of the present utility model;

FIG. 6 is an enlarged schematic view of a wind deflector according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view of a reinforcing bar according to an embodiment of the present utility model;

fig. 8 is a schematic diagram of airflow flowing to a wind deflector according to an embodiment of the present utility model.

[ Reference numerals ]

The ventilator 100 is configured to provide a ventilation function,

The air outlet 101 is provided with a plurality of air inlets,

Frame 10, snail shell 20, fan blade 30, rolling plate 40, wind guard 50, reinforcing rib 60 and motor 70.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are some, but not all, embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the disclosure, are within the scope of the disclosure.

The following orientations or positional relationships are merely to facilitate description of the present disclosure and to simplify the description, and are not indicative or implying that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present disclosure.

In the description of the present disclosure, it should be noted that, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically connected or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.

Static pressure refers to pressure applied to the surface of an object when the object moves linearly at a static or uniform speed, and static pressure formed in a pipeline refers to gas pressure formed in the pipeline and preventing the gas from flowing from an air outlet to a parallel surface. The following is a description of embodiments of the present disclosure.

As shown in fig. 2-8, a ceiling-embedded ventilation fan 100 includes: the multi-wing centrifugal fan comprises a frame 10 and a multi-wing centrifugal fan arranged in the frame 10, wherein the multi-wing centrifugal fan is provided with a snail shell 20, fan blades 30 and a motor 70, the fan blades 30 and the rotating shaft are arranged in the snail shell 20 vertically, the snail shell 20 comprises an upper snail shell plate, a lower snail shell plate, a coiled plate 40 which forms an outer peripheral wall between the upper snail shell plate and the lower snail shell plate and is connected with a tongue of the multi-wing centrifugal fan and an air outlet 101, and an air inlet arranged at the lower snail shell plate of the snail shell 20, the coiled plate 40 is provided with an air path which is slightly round from the tongue to the rotating direction of the fan blades 30, and when the fan blades 30 rotate, air sucked from the air inlet of the snail shell 20 is discharged to the outside through the air outlet 101 of the snail shell.

A wind deflector 50 is provided on the inner side of the fan blade 30 of the multi-wing centrifugal fan, the wind deflector 50 has a curved piece formed by bending in the opposite direction from the rotation of the fan blade 30 and in the direction away from the inner side of the fan blade 30, and the wind deflector 50 is located in the range of 0-150 ° in the clockwise direction from the line connecting the center of the fan blade 30 and the air outlet direction of the air outlet 101.

The multi-wing centrifugal fan is positioned at the left side, the air outlet 101 is positioned at the right side, and air flow is blown out from the left side to the right side at the air outlet 101 through an air path, namely, the air outlet direction of the air outlet 101 is rightward. The center position of the fan blade 30 is understood to be the rotation axis of the motor 70, and the connection line between the center of the fan blade 30 and the air outlet direction of the air outlet 101 is shown in fig. 2, and the wind guard 50 can be arranged in the range of 0-150 ° clockwise from the air outlet 101.

When the ceiling-embedded ventilator 100 is operated, the wind sucked from the wind inlet of the snail shell 20 is blown toward the wind outlet 101 of the snail shell and then discharged to the outside. When the external wind pressure or the pipe connecting the outside is long and the resistance is large, the wind blown out from the air outlet 101 of the snail shell is reduced, so that the wind discharged to the outside is reduced, namely, the ventilation amount is reduced, the wind not discharged from the air outlet 101 flows back into the snail shell 20, and the wind flows back to the tongue and is diffused to the inner side, namely, the center of the fan blade 30, due to the small wind path sectional area of the tongue. The wind shield 50 is arranged in the middle of the airflow pressure of the air path, so that the airflow pressure is forced to move forwards, the highest static pressure in the whole air path is increased, and when the static pressure in the air path is large enough, the static pressure of a pipeline communicated with the outside can be resisted, so that the whole air quantity is forced to flow to the pipeline without backflow.

It will be appreciated that when the wind deflector is disposed at the position opposite to the tongue in the prior art, with the extreme increase of the static pressure of the air outlet, the wind deflector cannot completely block the reverse flow phenomenon, and the arc length of the wind deflector needs to be further increased to avoid the reverse flow phenomenon, i.e. the principle is similar to that of a wall, a high pressure area is formed at the rear end of the reverse flow, and the reverse flow is pressed back, but if the static pressure is too high, the high pressure area is insufficient to press back the reverse flow, and the reverse flow may overflow at the wind deflector, thereby forming noise. In the present application, the front flow rate, which may generate reverse flow, is reduced, and the outflow direction is changed, so that the reverse flow is prevented from being generated from the source, and therefore, the installation position of the wind shield 50 is more than the position of the wind shield in the prior art under the extremely high static pressure environment, and the noise processing capability is stronger.

When the ceiling-embedded ventilator 100 is operated, since the wind deflector 50 is positioned inside the fan blade 30, air is rapidly sucked from a gap portion formed on the upstream side of the wind deflector 50, and out of air sucked from the air inlet of the snail shell 20, air sucked from the end portion of the wind deflector 50 into the fan blade 30 increases in speed as compared with other portions, and accordingly noise increases.

The wind deflector 50 of the present application is provided with the curved piece by being curved in the direction away from the inner side of the fan blade 30 in the opposite direction of the rotation of the fan blade 30, and the distance between the inner side of the fan blade 30 and the wind deflector 50 is gradually reduced, thereby preventing wind from being rapidly sucked from the gap portion and reducing noise.

The wind guard 50 and the wind inlet are arranged on the lower snail shell plate of the snail shell 20, and the wind guard 50 extends to a certain length along the edge of the wind inlet towards the direction of the fan blade 30. Referring to fig. 3, the length L2 of the wind deflector 50 extending along the edge of the air inlet in the direction of the fan blade 30 is preferably four fifths of the length L1 of the fan blade 30.

In one embodiment, the wind deflector 50 is removable. That is, the wind deflector 50 may be formed separately. According to the embodiment, the wind shield is required to be fixed on the snail shell, the embodiment is suitable for directly additionally installing the ventilating fan without the baffle, the problem of abnormal noise can be solved, and the wind shield can be detached, so that the operation is more convenient.

In another embodiment, the wind deflector 50 is integrally formed with at least a portion of the snail shell 20. That is, the wind deflector may be integrally formed with the snail shell or may be integrally formed with a portion of the snail shell.

According to one embodiment of the application, the wind deflector 50 is perpendicular to the surface of the wind inlet. In practical operation, it is found that when the wind deflector 50 is perpendicular to the surface of the air inlet, there is a risk of interference with the fan blade 30, and a part of air quantity is blocked, so that noise reduction is affected. Therefore, this arrangement is not optimal, although it solves a certain noise problem compared to the prior art.

As a modification of this embodiment, as shown in fig. 4, according to another embodiment of the present application, the wind deflector 50 has an angle α with the surface of the air intake. After practical operation verification, in the comparative data of the two embodiments, the noise when the wind deflector 50 is perpendicular to the surface of the air inlet is 43dB, and after the wind deflector 50 is adjusted to a certain included angle with the surface of the air inlet, the noise is 41dB, which has obvious improvement effect.

Preferably, the test is continued in the angle between the wind deflector 50 and the surface of the wind inlet, the angle α between the wind deflector 50 and the surface of the wind inlet of the snail shell 20 is 0-30 °, and especially when the angle between the wind deflector 50 and the surface of the wind inlet of the snail shell 20 is 13 °, the noise is minimum, i.e. the noise reduction degree is maximum at this angle, so as to achieve the best effect.

According to an embodiment of the present application, in order to avoid interference between the fan blade 30 and the wind deflector 50, the minimum distance between the wind deflector 50 and the fan blade 30 is set to be not less than 5mm.

According to one embodiment of the application, the arc length L of the wind deflector 50 is 52mm. As shown in fig. 6, the arc length L of the wind deflector 50 is the length of the wind deflector 50 along the inner side of the fan blade 30, which can cover the inner side of the fan blade 30.

According to an embodiment of the present application, in order to prevent the wind deflector 50 from being deformed, the reinforcing rib 60 is provided on the inner side of the wind deflector 50, and as shown in fig. 5 and 6, the reinforcing rib 60 protrudes toward the center of the fan blade 30 to form a certain cross section, which can block the flow of wind to some extent.

Further, in order to reduce the resistance of the air flow, the rib 60 is designed in a V shape, and the sharp corner of the V shape, referring to fig. 7,V, protrudes toward the center of the fan blade 30, and both sides of the V shape are connected to the inner side of the fan blade 30. The principle is shown in fig. 8, in which one air flow is blocked and thus divided into two when it flows to the rib 60, and a part thereof flows along the outer surface of the rib 60, i.e., the V-shaped surface, and the other part maintains the flow direction of the initial wind, unlike the flow direction of the initial wind. It will be appreciated that after the airflow has passed the wind deflector 50, the direction of the airflow is changed so that the compressed airflow is significantly reduced and so that there is less airflow regurgitation.

Thus, embodiments of the present utility model have been described in detail with reference to the accompanying drawings. The present utility model should be clearly recognized by those skilled in the art in light of the above description.

It should be noted that, in the drawings or the text of the specification, implementations not shown or described are all forms known to those of ordinary skill in the art, and not described in detail. Furthermore, the above definitions of the elements are not limited to the specific structures, shapes mentioned in the embodiments, and may be simply modified or replaced by those of ordinary skill in the art. For example: the air exchanging fan side air inlet and the circulating fan side air inlet are two air inlets which are not communicated with each other.

While the foregoing is directed to embodiments of the present utility model, other and further details of the utility model may be had by the present utility model, it should be understood that the foregoing description is merely illustrative of the present utility model and that no limitations are intended to the scope of the utility model, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the utility model.

Claims (10)

1. A ceiling-embedded ventilation fan, comprising:

a frame;

the multi-wing centrifugal fan is arranged in the frame and is provided with a snail shell, fan blades and a motor which are positioned in the snail shell, the fan blades and the rotating shaft are vertically arranged in the snail shell,

The snail shell comprises an upper snail shell plate, a lower snail shell plate, a rolling plate which forms a peripheral wall between the upper snail shell plate and the lower snail shell plate and is connected with the tongue part and the air outlet of the multi-wing centrifugal fan, and an air inlet arranged at the snail shell,

The coiled plate is provided with an air path from the tongue part to the rotating direction of the fan blade to the air outlet;

A wind deflector which is arranged on the inner side of the fan blade, is provided with a bending piece which is bent from the opposite direction of the rotation of the fan blade to the inner side of the fan blade,

It is characterized in that the method comprises the steps of,

The wind shield is positioned in the range of 0-150 degrees from the connecting line of the center of the fan blade and the air outlet direction of the air outlet to the clockwise direction.

2. The ceiling embedded ventilation fan of claim 1, wherein the wind deflector is removable or integrally formed with at least a portion of the snail shell.

3. The ceiling embedded ventilation fan of claim 1, wherein the wind deflector has an arc length of 52mm.

4. The ceiling-embedded ventilation fan of claim 1, wherein the wind deflector is perpendicular to a surface of the air intake.

5. The ceiling-embedded ventilation fan of claim 1, wherein the wind deflector is at an angle to a surface of the air intake.

6. The ceiling embedded ventilator of claim 5, wherein the wind deflector is angled between 0 ° and 30 ° from the surface of the snail shell air intake.

7. The ceiling embedded ventilation fan of claim 1, wherein the minimum distance between the wind deflector and the fan blade is not less than 5mm.

8. The ceiling-embedded ventilation fan of claim 1, wherein the wind deflector extends a length along an edge of the air intake opening in a direction of the fan blades.

9. The ceiling embedded ventilation fan of claim 8, wherein the length of the wind deflector extending along the edge of the air inlet in the direction of the fan blades is four fifths of the length of the fan blades.

10. The ceiling-embedded ventilator of claim 1, wherein the inside of the wind deflector is provided with a reinforcing rib protruding toward the center of the fan blade.