Low-noise fan

Abstract

The utility model discloses a low-noise fan which comprises a fan body, an air inlet and a rectifying ring. The fan air inlet is formed in one side of the fan shell; a rectifying ring is arranged on the side, located in the fan shell, of the air inlet and used for arranging airflow entering from the air inlet, and vortex forming is damaged. The rectifying ring device is designed at the air inlet and used for damaging vortex formation at the air inlet, and noise caused by friction and collision between the vortex and parts at the air inlet and the fan body is avoided. The fan solves the problems that in the using process of an existing fan, airflow is disordered at the air inlet to generate vortex, noise is brought by friction between the vortex and the fan, and the noise is not reduced or improved from the fan body structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of fan equipment, and in particular relates to a low-noise fan. Background Art

[0002] A centrifugal fan draws in gas from the air inlet through the rotation of the impeller, accelerates it along the radial fan blades, and finally discharges it from the air outlet along the tangent direction of the impeller, thereby generating airflow.

[0003] When air is sucked in from the air inlet, vortices are formed. These vortices will frequently collide and rub against the fan casing and parts at the air inlet to form aerodynamic noise. In order to reduce the noise of the fan during operation, it is usually necessary to tighten the parts to reduce their mobility; tighten the fan as a whole to reduce the noise generated by the overall movement of the fan; add a silencer or silencer cover to block the spread of noise; but none of the above methods can fundamentally solve the noise problem of the fan at the air inlet. Utility Model Content

[0004] The utility model provides a low-noise fan, in which a rectifying ring device is designed at the air inlet to destroy the vortex formation at the air inlet, and avoid the friction and collision between the vortex and the parts at the air inlet and the fan body to generate noise. The utility model solves the problem that during the use of the existing fan, the air flow is turbulent at the air inlet to generate vortex, and the friction between the vortex and the fan causes noise, but the noise is not reduced or improved from the fan body structure.

[0005] In order to achieve the above technical objectives, the utility model is implemented through the following technical solutions:

[0006] A low-noise fan, comprising: a fan, an air inlet, and a rectifier ring;

[0007] The fan air inlet is provided on one side of the fan housing;

[0008] A rectifying ring is arranged on one side of the air inlet located in the fan housing, which is used to rectify the airflow entering from the air inlet and destroy the formation of vortex.

[0009] Preferably, the rectifying ring is in a circular ring shape, and a plurality of baffles are connected to the inner side of the rectifying ring; the baffles are used to block and cut the airflow that is about to form a vortex.

[0010] Preferably, the baffle is installed obliquely on the inner side of the rectifier ring, and the inclination direction is consistent.

[0011] Preferably, the number of the baffles is at least 3, and the intervals between the connection positions of the baffles on the inner side of the rectifier ring are divided into equal angles.

[0012] Preferably, the baffle is in an "n"-shaped structure, and the edge of the baffle is a sharp edge; the purpose is to reduce the contact friction between the airflow passing through the baffle.

[0013] Preferably, the baffles are crisscrossedly connected to the inner side of the rectifying ring to form a grid shape; when the airflow passes through, the airflow can be guided to prevent the formation of turbulence or eddy currents.

[0014] Preferably, the air inlet is provided with an outwardly flared bell mouth on one side outside the fan housing, in order to facilitate airflow attraction.

[0015] Preferably, fan blades are rotatably arranged inside the fan and at the rear side of the rectifying ring, so as to accelerate the centrifugal flow sucked from the air inlet to form a wind energy airflow.

[0016] Preferably, an air outlet is provided on the fan; the formed wind energy airflow is output from the air outlet.

[0017] Preferably, a base is provided on the lower side of the fan.

[0018] The beneficial effects of the utility model are:

[0019] By utilizing the low-noise fan provided by the utility model, when the airflow passes through the air inlet, the effect of the rectifying ring can prevent the airflow from forming a vortex due to the attraction of the impeller, thereby preventing the vortex from rubbing and colliding with the parts at the air inlet of the fan body to generate noise; the presence of the rectifying ring can greatly reduce the generation of noise.

[0020] The outer side of the air inlet is set as a bell mouth, which is conducive to airflow attraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the front structure of the air inlet of the fan of the utility model;

[0023] Figure 2 It is a schematic diagram of the internal structure of the utility model from the side;

[0024] Figure 3 This is a schematic diagram of the rectifier structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the baffle structure of the utility model;

[0026] Figure 5It is a schematic diagram of the side structure of the baffle of the utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the rectifier ring baffle of Embodiment 4 of the utility model;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1-fan, 101-base, 2-air inlet, 3-air outlet, 4-bell mouth, 5-fan blades, 6-rectifier ring, 601-baffle, 6011-sharp edge. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example 1

[0032] See also Figures 1 to 3 As shown, a low-noise fan comprises: a fan 1, an air inlet 2, and a rectifier ring 6;

[0033] The air inlet 2 of the fan 1 is opened on one side of the fan 1 housing; a rectifying ring 6 is arranged on one side of the air inlet 2 located inside the fan 1 housing, the rectifying ring 6 is in a circular ring shape, and four baffles 601 are connected on the inner side of the rectifying ring 6 in an inclined direction in the same direction; the baffles 601 are used to block and cut the airflow that is about to form a vortex, and are used to organize the airflow entering from the air inlet 2 to destroy the formation of the vortex.

[0034] The fan blades 5 are rotatably arranged in the fan 1 and located behind the rectifying ring 6, and are used to accelerate the airflow sucked from the air inlet 2 to form a wind energy airflow. The fan 1 is provided with an air outlet 3; the formed wind energy airflow is output from the air outlet 3. A base 101 is arranged at the lower side of the fan 1.

[0035] Example 2

[0036] See also Figures 3 to 5 As shown, based on Embodiment 1, the intervals between the connection positions of the baffles 601 on the inner side of the rectifier ring 6 are divided at equal angles, so that each baffle 601 has an equal destructive effect on the eddy current;

[0037] The baffle 601 is in an “n”-shaped structure, and the edge of the baffle 601 is a sharp edge, so as to reduce the contact friction between the airflow passing through the baffle 601 .

[0038] Example 3

[0039] See also Figure 2 As shown, based on Example 1, an outwardly expanding bell mouth 4 is provided on one side of the air inlet 2 located outside the housing of the fan 1; the purpose is to facilitate airflow attraction.

[0040] Example 4

[0041] See also Figure 6 As shown, based on Example 1, the baffles are designed to be crisscrossed and connected inside the rectifying ring to form a grid shape; when the airflow passes through, the airflow can be guided to prevent turbulence or eddy currents from forming.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A low noise fan, characterized in that: include: Fan (1), air inlet (2), rectifier (6); The air inlet (2) of the fan (1) is disposed on one side of the housing of the fan (1); The air inlet (2) is located on one side of the housing of the fan (1) and is provided with a rectifying ring (6) for rectifying the airflow entering from the air inlet (2) and destroying the formation of vortices.

2. A low noise fan according to claim 1, characterized in that: The rectifying ring (6) is in the shape of a circular ring, and a plurality of baffles (601) are connected to the inner side of the rectifying ring (6).

3. A low noise fan according to claim 2, characterized in that: The baffle (601) is installed at an angle on the inner side of the rectifier ring (6), and the inclination direction is consistent.

4. A low noise fan according to claim 3, characterized in that: The number of the baffles (601) is at least three, and the intervals between the connection positions of the baffles (601) on the inner side of the rectifier ring (6) are divided at equal angles.

5. A low noise fan according to claim 4, characterized in that: The baffle (601) is in an "n"-shaped structure, and the edge of the baffle (601) is a sharp edge (6011).

6. A low noise fan according to claim 2, characterized in that: The baffles are connected to the inner side of the rectifier coil in a crisscross manner to form a grid shape.

7. A low noise fan according to claim 1, characterized in that: The air inlet (2) is located on one side outside the housing of the fan (1) and is provided with an outwardly expanding bell mouth (4).

8. A low noise fan according to claim 1, characterized in that: The fan blades (5) are rotatably arranged in the fan (1) and located behind the rectifying ring (6).

9. A low noise fan according to claim 1, characterized in that: An air outlet (3) is provided on the fan (1); and a base (101) is provided on the lower side of the fan (1).

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