CN214742347U

CN214742347U - Air duct structure of centrifugal fan

Info

Publication number: CN214742347U
Application number: CN202120662689.XU
Authority: CN
Inventors: 杜均华
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-11-16
Anticipated expiration: 2031-03-31

Abstract

The utility model discloses a centrifugal fan air duct structure, which comprises a shell, a motor and a wind wheel, wherein an air duct is arranged in the shell, the air duct comprises a rotary air duct part and a linear air duct part, and the motor and the wind wheel are positioned in the rotary air duct part; defining the diameter of the motor shaft as a, the diameter of the wind wheel as b, the reserved space of the air inlet as c, the wind cutting angle as T, the radius of the rotary air duct part as R, and the point of the rotary air duct part at a certain angle as x; the values of a, b, c, T and R satisfy R (x) ═ b + c + [ a × T × pi/100 ]; the improved rotary air duct part is matched with the wind wheel more coordinately, so that the air flow in the air duct is uniform, the air outlet efficiency of the centrifugal fan is improved, and the air duct is favorable for silencing.

Description

Air duct structure of centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field, especially a centrifugal fan wind channel structure.

Background

Centrifugal fans are devices that discharge gas by mechanical energy, and are widely used in various fields such as factories, boilers, air conditioners, and the like. The air duct of the centrifugal fan generally comprises a rotary air duct part and a linear air duct part, wherein the rotary air duct part is formed by adopting an approximate spiral line or a plurality of circular arcs with different diameters. Because the design theory is imperfect and the matching with the impeller is not harmonious, the wind blade of the wind wheel flows unevenly in each flow channel, so that the air outlet efficiency of the centrifugal fan is not high and larger noise can be generated.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a centrifugal fan air duct structure.

The utility model provides a technical scheme that its technical problem adopted is: the centrifugal fan air duct structure comprises a shell, a motor and a wind wheel, wherein an air duct is arranged in the shell, the air duct comprises a rotary air duct part and a linear air duct part, the motor and the wind wheel are positioned in the rotary air duct part, and the wind wheel comprises wind blades; the left side and the right side of the rotary air duct part are provided with air inlets, the end opening part of the linear air duct part is used as an air outlet, the motor is connected with the wind wheel through a motor shaft, and the wind wheel is arranged on the left side and the right side of the motor and corresponds to the air inlets; defining the diameter of the motor shaft as a, the diameter of the wind wheel as b, the reserved space of the air inlet as c, the wind cutting angle as T, the radius of the rotary air duct part as R, and the point of the rotary air duct part at a certain angle as x; the values of a, b, c, T and R satisfy R (x) ═ b + c + [ a × T × pi/100 ].

According to the utility model provides a centrifugal fan wind channel structure, through the rotatory wind channel part that adopts the air duct behind the improvement, more harmonious with the wind wheel cooperation makes the air current in the wind channel even, not only improves centrifugal fan air-out efficiency, also is favorable to the silence.

As some preferred embodiments of the utility model, rotatory wind channel part position is provided with the motor mounting panel of vertical installation, be provided with motor mounting hole and ventilation hole on the motor mounting panel, be provided with the motor in the motor mounting hole.

As some preferred embodiments of the utility model, the motor mounting panel separates rotatory wind channel part for left side air inlet duct and right side air inlet duct, the left side air inlet duct pass through between the right side air inlet duct the ventilation hole keeps air inlet pressure balance.

As some preferred embodiments of the present invention, the wind wheel includes a wheel disk plate, the middle of the wheel disk plate is provided with a direction the convex protrusion of the wind blade, and the wind blade is located outside the protrusion.

As some preferred embodiments of the present invention, the wheel disc plate blocks the ventilation hole with respect to the left and right side directions of the housing.

As some preferred embodiments of the utility model, the air intake border orientation the motor direction is provided with air inlet wind-guiding circle.

As some preferred embodiments of the present invention, for the left and right side directions of the casing, the casing and the air inlet guiding ring block the wind blade.

As some preferred embodiments of the utility model, the air inlet wind-guiding circle with the horizontal distance of wind wheel is d, d value range does

As some preferred embodiments of the present invention, a control housing is disposed between the front side of the rotary air duct portion and the upper side of the linear air duct portion, a control accommodating cavity is disposed in the control housing, and the control accommodating cavity is located outside the air duct; the front side of the control shell is provided with a mounting opening, and a panel is arranged on the mounting opening.

As some preferred embodiments of the utility model, be provided with high power device installation shell in the control shell and be used for installing high power device.

The utility model has the advantages that: the improved air duct structure is more coordinated with the wind wheel, so that the air flow in the air duct is uniform, the air outlet efficiency of the centrifugal fan is improved, and the silencing is facilitated.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a perspective view of the present invention;

FIG. 2 is a schematic view of the air duct structure of the present invention;

FIG. 3 is a front cross-sectional view of the present invention;

fig. 4 is a perspective sectional view of the present invention;

FIG. 5 is a perspective view of the mounting plate for the motor of the present invention;

FIG. 6 is a perspective view of a septum cap of the present invention;

FIG. 7 is a schematic view of the installation of the middle panel of the present invention;

fig. 8 is a partial enlarged view of the medium and high power device mounting case of the present invention.

Reference numerals:

the air conditioner comprises a shell 100, an air inlet 110, an air inlet guide ring 111, an air outlet 120, a control shell 130, a mounting port 131, a control shell mounting hole 132, a panel 140, a panel mounting part 141, a high-power device mounting shell 150, a high-power device mounting through hole 151, a screen 160, a screen mounting edge 161, a grid 162, a screen guide ring 163 and a handle 170;

an air duct 200, a rotary air duct portion 210, a left air inlet duct 211, a right air inlet duct 212, a linear air duct portion 220;

a motor 300;

wind wheel 400, wind blades 410, wheel disc plate 420, bulge 421 and annular connecting plate 430;

a motor mounting plate 500, a motor mounting hole 510, a vent hole 520;

circuit board 600, high power device 610, heat sink 611.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. In the following description, certain specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the invention can be practiced without these specific details, i.e., those skilled in the art can more effectively describe the nature of their work to others skilled in the art using the descriptions and representations herein. Furthermore, it should be noted that the terms "front side", "rear side", "left side", "right side", "upper side", "lower side", and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a specific part, respectively, and those skilled in the art should not understand that the technology beyond the scope of the present application is simply and innovatively adjustable in the directions. If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe layouts, etc., are not described in detail since they are readily understood by those of ordinary skill in the art, to avoid obscuring the present invention.

Fig. 1 is a perspective view of an embodiment of the present invention, referring to fig. 1, an embodiment of the present invention provides an air duct structure of a centrifugal fan, including a casing 100, a motor 300, and a wind wheel 400, the casing 100 is provided with an air duct 200 inside. Referring to fig. 2, the air chute 200 includes a rotary chute portion 210 and a linear chute portion 220. Referring to fig. 3 and 4, the motor 300 and the wind rotor 400 are located in the rotary air duct portion 210, and the wind rotor 400 includes wind blades 410.

The left and right sides of the rotary air duct portion 210 are provided with air inlets 110, the end opening portion of the linear air duct portion 220 is used as an air outlet 120, the motor 300 is connected with the wind wheel 400 through a motor shaft, and the wind wheel 400 is arranged on the left and right sides of the motor 300 and corresponds to the air inlets 110. That is, the rotary air duct portion 210 and the linear air duct portion 220 are integrally connected to form the complete air duct 200, and when the centrifugal fan works, air is supplied from the air inlet 110 and is discharged from the air outlet 120.

The diameter of the motor shaft is defined as a, the diameter of the wind wheel 400 is defined as b, the reserved space of the wind inlet 110 is defined as c, the wind cutting angle is defined as T, the radius of the rotary air channel part 210 is defined as R, and a point at a certain angle of the rotary air channel part 210 is defined as x.

a. The values of b, c, T and R satisfy, R (x) b + c + [ a T pi/100 ].

In operation, the motor 300 controls the wind wheels 400 on both sides to rotate together, and then the air flow enters the rotary air channel portion 210 from the wind inlets 110 on both sides. The air flow of the rotary air channel portion 210 then goes out from the air outlet 120 along the linear air channel portion 220.

The improved air duct structure is more coordinated with the wind wheel 400, so that the air flow in the air duct 200 is uniform, the air outlet efficiency of the centrifugal fan is improved, and the silencing is facilitated.

What the above discloses a centrifugal fan wind channel structure reveals is only the embodiment of the preferred utility model, only is used for explaining the technical scheme of the utility model, rather than limiting it. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not fixedly presented in any particular order, nor are they intended to be limiting of the present invention.

In some embodiments, the origin is based on the center point of the rotor or the motor shaft, and the motor shaft must be coincident with the center of the rotor and the coordinate axes.

In some embodiments, since the circumferential ratio includes decimal points, the decimal points are generally ignored for the calculation of r (x) and the result of the basic formula of the wind tunnel design for the sake of convenience and processing accuracy, taking an integer.

In this embodiment, pi may be 3.1416.

In some embodiments, the overall duct design is made up of N points R (x), each point being connected to a curve of one to two points near itself.

In some embodiments, with the horizontal direction of the intake vent 110 toward the motor 300 as the Z-axis, the first point R (1) is generally on the X-axis of the first or fourth quadrant of coordinates, and the last R (X) is generally on the Y-axis of the third or fourth quadrant of coordinates.

In some embodiments, referring to fig. 2, each angle r (x) except the first point r (x) is modified appropriately to form a reasonable energy storage area L, a buffer area M, and a release area N according to the actual use situation.

In the energy storage area, the wind cutting starts, the wind speed is high, and the flow is small;

in the buffer area, after the wind is cut, the wind speed is lower than that of the energy storage area, and the flow is larger;

in the release area, the energy storage and the buffering are finished, the released wind speed is slow, but the wind quantity is very large, and the noise is low.

In some embodiments, referring to fig. 5, the rotary air channel portion 210 is positioned with a vertically mounted motor mounting plate 500, the motor mounting plate 500 is provided with a motor mounting hole 510 and a vent hole 520, and the motor 300 is disposed in the motor mounting hole 510. When the air flow enters the rotary air duct portion 210 from the air inlets 110 on both sides, the motor mounting plate 500 can prevent the air flow entering on both sides from directly colliding with each other, thereby playing a role of guiding the flow.

In some embodiments, the motor mounting plate 500 divides the rotary air duct portion 210 into a left air inlet duct 211 and a right air inlet duct 212, and the air pressure of the inlet air is balanced between the left air inlet duct 211 and the right air inlet duct 212 through the vent holes 520.

In some embodiments, the wind wheel 400 includes a wheel disc plate 420, a protrusion 421 protruding toward the wind blade 410 is disposed in the middle of the wheel disc plate 420, and the wind blade 410 is located outside the protrusion 421, which is beneficial to improving the working efficiency of the wind wheel.

In some embodiments, the ends of the wind blades 410 are connected by an annular web 430.

In some embodiments, the wheel plate 420 blocks the ventilation holes 520 in the left and right directions of the casing 100, so that the air flow on the left and right sides respectively enters the rotating air duct portion 210 without directly impacting the wind blades 410, which is beneficial to the silencing effect of the centrifugal fan during operation.

In some embodiments, the inlet 110 is provided with an inlet air guiding ring 111 along the edge facing the motor 300, which can guide the airflow entering the inlet 110.

In some embodiments, the casing 100 and the air inlet guiding ring 111 block the wind blade 410 relative to the left and right directions of the casing 100, so that when the air enters the air inlet 110, the air does not directly impact the wind blade 410, which is beneficial to the silencing effect of the floor blower during operation.

In this embodiment, optionally, the area and the diameter of the air inlet of the wind wheel 400 are larger than the area and the diameter of the circular cross section surrounded by the air inlet guide ring 111, and the edge of the air inlet guide ring 111 has a transition arc.

In some embodiments, the horizontal distance between the wind inlet/guiding ring 111 and the wind wheel 400 is d, and the value range of d is

In some embodiments, referring to fig. 6, the air inlet 110 is provided with a screen member 160 for blocking foreign objects from entering the centrifugal fan.

In this embodiment, the mesh-separating member mounting edge 161 and the mesh 162 are optional. The screen member 160 is fixedly mounted by a screen member mounting edge 161.

In this embodiment, optionally, the net-separating member wind-guiding ring 163 replaces the function of guiding the airflow when the air is introduced.

In some embodiments, referring to fig. 7, a control housing 130 is disposed between the front side of the rotary air channel portion 210 and the upper side of the linear air channel portion 220, so as to reinforce the structural strength of the centrifugal fan. A control accommodating cavity is arranged in the control shell 130 and is located outside the air duct 200. The circuit board is installed in the control of control shell 130 holds the chamber, realizes that controller, circuit board etc. integrate the installation with centrifugal fan, and overall structure is compacter. The control housing 130 is provided with a mounting opening 131 at the front side thereof, and a panel 140 is provided on the mounting opening 131. The circuit board and the controller can be installed in the control accommodating cavity and then the panel 140 is installed, so that the maintenance is convenient.

In this embodiment, optionally, an outer mounting hole 132 is disposed on a side of the control housing 130, a panel mounting portion 141 is disposed on a rear side of the panel 140, a rear mounting hole is disposed on the panel mounting portion 141, and the outer mounting hole 143 is connected to the rear mounting hole by a horizontally inserted screw. This configuration not only facilitates assembly, but also improves the utilization of the panel 140.

In some embodiments, referring to fig. 8, a high power device mounting case 150 is disposed in the control case 130 for mounting the high power device 610, which may serve to protect the high power device 610. The high-power device 610 is provided with a heat sink 611, and the heat sink 611 faces the linear air duct portion 220, which is beneficial to heat dissipation.

In this embodiment, optionally, the high power device mounting case 150 is provided with a high power device mounting through hole 151 for the heat sink 611 to extend out of the high power device mounting case 150 and to be fixed.

In some embodiments, a handle 170 is provided on the housing 100 to facilitate handling of the centrifugal fan.

In some embodiments, the entire duct 200, except for the inlet 110 and the outlet 120, should be sealed for optimal performance.

According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a centrifugal fan wind channel structure, includes casing (100), motor (300), wind wheel (400), casing (100) embeds there is wind channel (200), wind channel (200) are including rotatory wind channel part (210) and straight line wind channel part (220), motor (300), wind wheel (400) are located in rotatory wind channel part (210), wind wheel (400) are including wind blade (410), its characterized in that:

air inlets (110) are formed in the left side and the right side of the rotary air duct part (210), an opening part at the end part of the linear air duct part (220) serves as an air outlet (120), the motor (300) is connected with the wind wheel (400) through a motor shaft, and the wind wheel (400) is arranged on the left side and the right side of the motor (300) and corresponds to the air inlets (110);

defining the diameter of the motor shaft as a, the diameter of the wind wheel (400) as b, the reserved space of the wind inlet (110) as c, the wind cutting angle as T, the radius of the rotary air channel part (210) as R, and the point of the rotary air channel part (210) at a certain angle as x;

the values of a, b, c, T and R satisfy R (x) ═ b + c + [ a × T × pi/100 ].

2. The centrifugal fan air duct structure according to claim 1, characterized in that: rotatory wind channel part (210) position is provided with motor mounting panel (500) of vertical installation, be provided with motor mounting hole (510) and ventilation hole (520) on motor mounting panel (500), be provided with motor (300) in motor mounting hole (510).

3. The centrifugal fan air duct structure according to claim 2, characterized in that: the motor mounting plate (500) separates the rotary air duct part (210) into a left air inlet duct (211) and a right air inlet duct (212), and the left air inlet duct (211) and the right air inlet duct (212) are kept balanced in air inlet pressure through the air vents (520).

4. The centrifugal fan air duct structure according to claim 2, characterized in that: the wind wheel (400) comprises a wheel disc plate (420), a protruding portion (421) protruding towards the wind blade (410) is arranged in the middle of the wheel disc plate (420), and the wind blade (410) is located on the outer side of the protruding portion (421).

5. The centrifugal fan air duct structure according to claim 4, characterized in that: the wheel plate (420) blocks the ventilation hole (520) in the left-right direction of the housing (100).

6. The centrifugal fan air duct structure according to claim 1, characterized in that: and an air inlet guide ring (111) is arranged at the edge of the air inlet (110) towards the direction of the motor (300).

7. The centrifugal fan air duct structure according to claim 6, characterized in that: the casing (100) and the air inlet guide ring (111) block the wind blades (410) relative to the left and right directions of the casing (100).

8. The centrifugal fan air duct structure according to claim 6, characterized in that: the horizontal distance between the air inlet and guide ring (111) and the wind wheel (400) is d, and the value range of the d value is

9. The centrifugal fan air duct structure according to claim 1, characterized in that: a control shell (130) is arranged between the front side of the rotary air channel part (210) and the upper side of the linear air channel part (220), a control accommodating cavity is arranged in the control shell (130), and the control accommodating cavity is positioned outside the air channel (200);

the front side of the control shell (130) is provided with a mounting opening (131), and a panel (140) is arranged on the mounting opening (131).

10. The centrifugal fan air duct structure according to claim 9, characterized in that: and a high-power device mounting shell (150) is arranged in the control shell (130).