CN219139470U

CN219139470U - Fan volute and centrifugal fan

Info

Publication number: CN219139470U
Application number: CN202223608807.2U
Authority: CN
Inventors: 李嘉盛; 覃万翔; 梁燕好; 刘爱瑜
Original assignee: Guangdong Sunwill Precising Plastic Co Ltd
Current assignee: Guangdong Sunwill Precising Plastic Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-06
Anticipated expiration: 2032-12-30

Abstract

The utility model discloses a fan volute and a centrifugal fan, wherein the fan volute comprises: the shell comprises a coaming, a bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are arranged on two sides of the bottom plate, the bottom plate is provided with an air inlet, two ends of the coaming are respectively connected with the first side plate and the second side plate, and the bottom plate, the first side plate and the second side plate enclose an air outlet diffusion opening; the guide plate is arranged on the bottom plate and positioned at the air outlet diffusion opening, the guide plates are distributed at intervals, the guide plate is far away from the plate height of one end of the air outlet is H1, the guide plate is close to the plate height of one end of the air outlet is H2, and the requirements are met: h2 Not less than H1; the air flow speed of the air flow at the air outlet diffusion opening can be more concentrated through the guide plate, the dynamic pressure energy of the air flow is increased, the working efficiency is improved, and noise is not easily generated due to air flow separation caused by abrupt change of the shell space.

Description

Fan volute and centrifugal fan

Technical Field

The utility model relates to the technical field of fan volutes, in particular to a fan volute and a centrifugal fan.

Background

The volute of the centrifugal fan comprises a bottom plate and side plates at two sides of the bottom plate, the bottom plate and the side plates enclose a volute air outlet, and a volute tongue is positioned on one of the side plates. The impeller outlet to the volute outlet of the centrifugal fan is called as a diffusion section, the diffusion angle of the airflow speed is large in the area, the static pressure is rapidly increased, partial airflow speed is unbalanced, airflow is unsmooth to form vortex, airflow kinetic energy dissipation is caused, particularly in the rear disk part of the volute, the effect of the wall surface is more obvious, the flow is more unstable along the diffusion direction, and the ventilation efficiency is reduced. In addition, due to the existence of airflow vortex, turbulent noise of air outlet can be increased, and then the tone quality experience of the air conditioner is affected.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model provides a fan volute and a centrifugal fan.

In a first aspect, an embodiment of the present utility model provides a fan volute, including:

the shell comprises a coaming, a bottom plate, a first side plate and a second side plate, wherein the first side plate and the second side plate are arranged on two sides of the bottom plate, the bottom plate is provided with an air inlet, two ends of the coaming are respectively connected with the first side plate and the second side plate, and the bottom plate, the first side plate and the second side plate enclose an air outlet diffusion opening;

the guide plate is arranged on the bottom plate and positioned at the air outlet diffusion opening, the guide plates are distributed at intervals, the guide plate is far away from the plate height of one end of the air outlet is H1, the guide plate is close to the plate height of one end of the air outlet is H2, and the requirements are met: h2 And is more than or equal to H1.

The fan volute provided by the embodiment of the utility model has at least the following technical effects: the air flow speed of the air flow at the air outlet diffusion opening can be more concentrated through the guide plate, the dynamic pressure energy of the air flow is increased, the working efficiency is improved, and noise is not easily generated due to air flow separation caused by abrupt change of the shell space.

According to some embodiments of the utility model, the H2 satisfies: h2 is more than or equal to 30mm and less than or equal to 35mm.

According to some embodiments of the utility model, the baffle has a plate thickness S at an end near the air inlet, and the baffle has a plate thickness K at an end far from the air inlet, so as to satisfy the following conditions: s is more than or equal to K.

According to some embodiments of the utility model, the S satisfies: s is more than or equal to 2mm and less than or equal to 5mm.

According to some embodiments of the utility model, the thickness of the baffle gradually decreases from an end near the air inlet to an end far from the air inlet.

According to some embodiments of the utility model, the baffle is parallel to the first side plate.

According to some embodiments of the present utility model, a horizontal plate is disposed between the coaming and the first side plate, a line between a center of the air inlet and an end of the baffle close to the first side plate, which is close to the air inlet, is a first line, a line passing through the center of the air inlet and perpendicular to the horizontal plate is a second line, and an included angle between the first line and the second line is θ, so that: θ is more than or equal to 40 degrees and less than or equal to 45 degrees.

According to some embodiments of the utility model, a minimum distance a between the baffle and the first side plate, which is close to the first side plate, is a, satisfying: a is more than or equal to 15mm and less than or equal to 20mm.

According to some embodiments of the utility model, the minimum distance between two adjacent deflectors is B, satisfying: b is more than or equal to 0.5×H2 and less than or equal to 1.5×H2.

In a second aspect, an embodiment of the present utility model further provides a centrifugal fan, including a fan volute according to the embodiment of the first aspect of the present utility model.

The centrifugal fan provided by the embodiment of the utility model has at least the following technical effects: the centrifugal fan adopts the fan volute, the flow velocity of the airflow at the air outlet diffusion opening can be more concentrated by the guide plate, the dynamic pressure energy of the airflow is increased, the working efficiency is improved, and meanwhile, noise is not easy to be generated because of airflow separation caused by abrupt change of the shell space.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a blower volute of some embodiments of the present utility model;

FIG. 2 is a schematic view of another angle of a blower volute of some embodiments of the utility model;

fig. 3 is a schematic view of a baffle according to some embodiments of the present utility model.

Reference numerals:

the coaming 110, the bottom plate 120, the first side plate 130, the second side plate 140, the horizontal plate 150, the air inlet 160, the air outlet diffusion opening 170, the deflector 180, the first line 191 and the second line 192.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, plural means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and the above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Embodiments of the present utility model will be further described below with reference to the accompanying drawings.

According to some embodiments of the utility model, referring to fig. 1-3, a blower volute includes a housing and a baffle 180. The casing includes bounding wall 110, bottom plate 120, sets up in the first curb plate 130 and the second curb plate 140 of the both sides of bottom plate 120, and bounding wall 110 is the curved surface form, and first curb plate 130 and second curb plate 140 are dull and stereotyped, and bottom plate 120 is equipped with air intake 160, and the both ends of bounding wall 110 are connected with first curb plate 130 and second curb plate 140 respectively, and bottom plate 120, first curb plate 130 and second curb plate 140 enclose into air-out diffusion mouth 170. The guide plate 180 is arranged on the bottom plate 120 and is positioned at the air outlet diffusion port 170, a plurality of guide plates 180 are distributed at intervals, the plate height of one end of the guide plate 180, which is far away from the air outlet, is H1, the plate height of one end of the guide plate 180, which is close to the air outlet, is H2, and the requirements are met: h2 And is more than or equal to H1.

When gas enters the fan volute from the air inlet 160 and is discharged through the air outlet diffusion opening 170, the flow speed of the air flow positioned at the air outlet diffusion opening 170 can be more concentrated by the guide plate 180, the dynamic pressure energy of the air flow is increased, the working efficiency is improved, the turbulence degree of the air flow at the outlet is reduced, and therefore the air flow vortex at the outlet section of the air outlet diffusion section of the volute is reduced, the air flow is more stable, and the ventilation efficiency is improved. Meanwhile, the vortex problem caused by the influence of the bottom plate 120 on the outlet of the existing fan volute is reduced, so that the turbulence noise of the air outlet is reduced, the tone quality experience of the fan volute is better, and the air outlet is more uniform.

Preferably, referring to fig. 1 and 3, H2 satisfies: h2 is more than or equal to 30mm and less than or equal to 35mm.

According to some embodiments of the present utility model, referring to fig. 2, the baffle 180 has a plate thickness S at an end near the air inlet 160, and the baffle 180 has a plate thickness K at an end far from the air inlet 160, which satisfies the following conditions: s is more than or equal to K.

Preferably, S satisfies: s is more than or equal to 2mm and less than or equal to 5mm.

Preferably, the thickness of the baffle 180 gradually decreases from the end close to the air inlet 160 to the end far from the air inlet 160, so as to conform to the gas-fluid characteristics and improve the air outlet efficiency.

According to some embodiments of the present utility model, the deflector 180 is parallel to the first side plate 130, and the plurality of deflector 180 are parallel to each other.

It should be noted that, when the plate thickness of the baffle 180 gradually decreases from the end near the air inlet 160 to the end far from the air inlet 160, the baffle 180 is isosceles trapezoid when viewed from the axial direction of the air inlet 160, and then the center line of the baffle 180 is parallel to the first side plate 130.

According to some embodiments of the present utility model, referring to fig. 2, a horizontal plate 150 is disposed between the shroud 110 and the first side plate 130, a line between a center of the air inlet 160 and an end of the baffle 180 adjacent to the first side plate 130, which is adjacent to the air inlet 160, is a first line 191, a line passing through the center of the air inlet 160 and perpendicular to the horizontal plate 150 is a second line 192, and an included angle between the first line 191 and the second line 192 is θ, so as to satisfy: theta is more than or equal to 40 degrees and less than or equal to 45 degrees so as to accord with the characteristics of gas fluid and improve the air outlet efficiency.

According to some embodiments of the present utility model, referring to fig. 2, the minimum distance a between the baffle 180 adjacent to the first side plate 130 and the first side plate 130 is a, which satisfies: a is more than or equal to 15mm and less than or equal to 20mm so as to accord with the gas-fluid characteristics and improve the air outlet efficiency.

According to some embodiments of the present utility model, referring to fig. 2, the minimum distance between two adjacent baffles 180 is B, satisfying: b is more than or equal to 0.5×H2 and less than or equal to 1.5×H2, so as to meet the gas-fluid characteristics and improve the air outlet efficiency.

In the description of the present specification, reference to the term "some embodiments" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A fan volute for use with a centrifugal fan, comprising:

the air inlet device comprises a shell, wherein the shell comprises a coaming (110), a bottom plate (120), a first side plate (130) and a second side plate (140) which are arranged on two sides of the bottom plate (120), the bottom plate (120) is provided with an air inlet (160), two ends of the coaming (110) are respectively connected with the first side plate (130) and the second side plate (140), and the bottom plate (120), the first side plate (130) and the second side plate (140) enclose an air outlet diffusion opening (170);

the guide plates (180), the guide plates (180) are arranged on the bottom plate (120) and located at the air outlet diffusion openings (170), the guide plates (180) are distributed at intervals, the guide plates (180) are far away from the plate height of one end of the air outlet diffusion openings (170) is H1, the guide plates (180) are close to the plate height of one end of the air outlet diffusion openings (170) is H2, and the following requirements are met: h2 And is more than or equal to H1.

2. The blower scroll of claim 1, wherein the H2 satisfies: h2 is more than or equal to 30mm and less than or equal to 35mm.

3. The blower volute of claim 1, wherein the baffle (180) has a plate thickness S at an end proximate to the air inlet (160), and the baffle (180) has a plate thickness K at an end distal from the air inlet (160), such that: s is more than or equal to K.

4. A fan volute according to claim 3, wherein S satisfies: s is more than or equal to 2mm and less than or equal to 5mm.

5. A fan volute according to claim 3, wherein the thickness of the baffle (180) decreases gradually from the end closer to the air inlet (160) to the end farther from the air inlet (160).

6. The blower scroll of claim 1, wherein the deflector (180) is parallel to the first side plate (130).

7. The fan volute according to claim 1, wherein a horizontal plate (150) is disposed between the shroud (110) and the first side plate (130), a line between a center of the air inlet (160) and an end of the deflector (180) close to the first side plate (130) near the air inlet (160) is a first line (191), a line passing through the center of the air inlet (160) and perpendicular to the horizontal plate (150) is a second line (192), and an included angle between the first line (191) and the second line (192) is θ, as viewed from an axial direction of the air inlet (160), so as to satisfy: θ is more than or equal to 40 degrees and less than or equal to 45 degrees.

8. The blower scroll according to claim 1, wherein a minimum distance a between the deflector (180) proximate the first side plate (130) and the first side plate (130) is: a is more than or equal to 15mm and less than or equal to 20mm.

9. The fan volute of claim 1, wherein a minimum distance between two adjacent baffles (180) is B, satisfying: b is more than or equal to 0.5×H2 and less than or equal to 1.5×H2.

10. A centrifugal fan comprising a fan volute according to any one of claims 1 to 9.