CN218717688U - Middle-section fan blade, cross-flow wind wheel and wall-mounted air conditioner - Google Patents

Abstract

The utility model discloses a middle-segment fan blade, cross-flow wind wheel and wall-mounted air conditioner, the middle-segment fan blade includes a plurality of blades, a plurality of blades are arranged along the circumference interval of middle-segment fan blade, the blade has pressure surface molded line and suction surface molded line, there are first inscribed circle and second inscribed circle between the pressure surface molded line of one blade and the suction surface molded line of its adjacent blade; the diameter D1 of the first inscribed circle is larger than the diameter D2 of the second inscribed circle. The utility model discloses a diameter D of first inscribed circle is greater than diameter D2 of second inscribed circle, reduces the air current and admits air the attack angle, makes the air current impact through the air current of cascade for the first time on the small side, and the air current passes through the wake flow that the cascade formed for the second time and also on the small side to the impact of snail tongue to make cross-flow fan's noise of revolution little.

Description

Middle-section fan blade, cross-flow wind wheel and wall-mounted air conditioner

Technical Field

The utility model relates to an air conditioner technical field especially relates to a well festival fan blade, cross-flow wind wheel and wall-hanging air conditioner.

Background

In the operation process of a cross-flow fan of a wall-mounted air conditioner, airflow passes through the blade grids twice, after the airflow does work through the first blade grid, the flow velocity is obviously increased when the airflow enters the blade grids for the second time, the flow velocity is larger, the noise is also larger, and the comfort of the air conditioner is poorer.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a well festival fan blade, cross-flow wind wheel and wall-hanging air conditioner.

According to the utility model discloses a middle-section fan blade of first aspect embodiment, including a plurality of blades, a plurality of blades are arranged along the circumference interval of middle-section fan blade, the blade has pressure surface molded lines and suction surface molded lines, has first inscribed circle and second inscribed circle between the pressure surface molded lines of one of them blade and the suction surface molded lines of its adjacent blade; one end of the first inscribed circle is connected with one end, close to the middle part of the middle-section fan blade, of the molded line of the suction surface, and the other end of the first inscribed circle is tangent to the molded line of the pressure surface; one end of the second inscribed circle is connected with one end, far away from the middle part of the middle-section fan blade, of the pressure surface molded line, and the other end of the second inscribed circle is tangent to the suction surface molded line; the diameter D1 of the first inscribed circle is larger than the diameter D2 of the second inscribed circle.

According to the utility model discloses well festival fan blade has following technological effect at least: because the diameter D of the first inscribed circle is larger than the diameter D2 of the second inscribed circle, the air inflow attack angle of the air flow is reduced, the air flow impact of the air flow passing through the blade cascade for the first time is smaller, and the wake flow formed by the air flow passing through the blade cascade for the second time also has smaller impact on the volute tongue, so that the cross-flow fan has small rotation noise and good sound quality; the falling vortex in the cascade flow passage is reduced, and the discrete noise of the fan is favorably reduced.

According to some embodiments of the invention, the acceleration channel coefficient ψ = D1/D2, wherein D1/D2=1.31-1.33.

According to some embodiments of the invention, the outlet setting angle of the blade is defined as β, β =33.5 ° to 34.5 °.

According to the utility model discloses a some embodiments, the both ends of pressure surface molded lines with line contained angle between the centre of a circle of well festival fan blade is cornerite alpha, and alpha =7.1 ~ 7.7.

According to some embodiments of the utility model, it is a plurality of the blade is close to the rotating diameter that the one end at middle part of the festival fan blade corresponds is D3, and is a plurality of the blade is kept away from the rotating diameter that the one end at middle part of the festival fan blade corresponds is D4, and wherein, D3/D4=0.73 ~ 0.83.

According to some embodiments of the invention, the cross-section of the blade is an airfoil structure.

According to the utility model discloses a cross-flow wind wheel of second aspect embodiment, including the axle cap and the end cover of relative setting and the well festival fan blade of first aspect embodiment, the axle cap with be equipped with a plurality of between the end cover well festival fan blade.

According to the utility model discloses through-flow wind wheel has following technological effect at least: the middle fan blade is arranged to reduce the noise of the air conditioner.

According to the utility model discloses a wall-hanging air conditioner of third aspect embodiment, including the through-flow wind wheel of second aspect embodiment.

According to the utility model discloses wall-hanging air conditioner has following technological effect at least: the cross flow wind wheel is arranged to reduce the noise of the air conditioner.

Additional aspects and advantages of the invention 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 invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a middle-segment fan blade according to an embodiment of the present invention;

fig. 2 is an enlarged view of a point a shown in fig. 1.

Reference numerals: the blade 100, the first inscribed circle 101, the second inscribed circle 102, the pressure surface profile 110 and the suction surface profile 120.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the present invention, such as the upper and lower directions, is the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification of the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality means two or more, and the terms greater than, less than, more than, etc. are understood not to include the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 and 2, the middle-segment blade according to the embodiment of the first aspect of the present invention includes a plurality of blades 100, the plurality of blades 100 are arranged at intervals along the circumferential direction of the middle-segment blade, the blades 100 have a pressure surface profile 110 and a suction surface profile 120, and a first inscribed circle 101 and a second inscribed circle 102 are provided between the pressure surface profile 110 of one blade 100 and the suction surface profile 120 of the adjacent blade 100; one end of the first inscribed circle 101 is connected with one end of the suction surface molded line 120 close to the middle part of the middle-segment fan blade, and the other end of the first inscribed circle 101 is tangent with the pressure surface molded line 110; one end of the second inscribed circle 102 is connected with one end of the pressure surface molded line 110 far away from the middle part of the middle-segment fan blade, and the other end of the second inscribed circle 102 is tangent with the suction surface molded line 120; the diameter D1 of the first inscribed circle 101 is larger than the diameter D2 of the second inscribed circle 102.

For example, the middle-segment fan blade includes a middle plate and a plurality of blades 100, the plurality of blades 100 are arranged on the middle plate at intervals along the circumferential direction of the middle-segment fan blade, the blades 100 are airfoil-shaped blades 100, each blade 100 has a pressure surface and a suction surface, the profile of the pressure surface is a concave curve, the profile of the suction surface is a convex curve, two inscribed circles are made between every two adjacent blades 100, the two inscribed circles are respectively a first inscribed circle 101 and a second inscribed circle 102, a point where one end of the suction surface profile 120 close to the middle of the middle-segment fan blade (the lower end point of the suction surface profile 120) is tangent to the pressure surface profile 110 forms a first inscribed circle 101, a point where one end of the pressure surface profile 110 far from the middle of the middle-segment fan blade (the upper end point of the pressure surface profile 110) is tangent to the suction surface profile 120 forms a second inscribed circle 102, the first inscribed circle 101 is close to the middle of the middle-segment fan blade, and the second inscribed circle 102 is far from the middle of the middle-segment fan blade.

Because the diameter D of the first inscribed circle 101 is larger than the diameter D2 of the second inscribed circle 102, the air inflow attack angle is reduced, so that the air flow impact of the air flow passing through the blade cascade for the first time is smaller, and the impact of the wake flow formed by the air flow passing through the blade cascade for the second time on the volute tongue is also smaller, thereby the rotary noise of the cross flow fan is small, and the sound quality is good; the falling vortex in the cascade flow passage is reduced, and the discrete noise of the fan is favorably reduced.

In some embodiments of the present invention, as shown in fig. 2, the acceleration channel coefficient ψ = D1/D2, wherein D1/D2=1.31-1.33. By adopting the proportion range, the air flow inlet attack angle is reduced, and the effect is better.

In some embodiments of the present invention, as shown in fig. 1, the outlet installation angle of the blade 100 is defined as β, β =33.5 ° to 34.5 °, so that the airflow can flow out of the blade row more smoothly, and the rotational noise of the cross flow fan is small. The included angle formed between the tangent line of the pressure profile 110 near the outside of the fan and the rotation direction of the fan is the outlet installation angle β of the blade 100.

In some embodiments of the present invention, as shown in fig. 1, an included angle between a connection line between two ends of the pressure surface profile 110 and a center of the middle segment blade is an included angle α, where α =7.1 — 7.7 °. So that the camber of the blade 100 is relatively gentle and the air inflow attack angle is reduced.

In some embodiments of the present invention, as shown in fig. 1, the rotation diameter corresponding to the end of the plurality of blades 100 close to the middle of the middle segment of the fan blade is D3, and the rotation diameter corresponding to the end of the plurality of blades 100 far away from the middle of the middle segment of the fan blade is D4, wherein D3/D4= 0.73-0.83, so as to reduce the air flow inlet attack angle.

The utility model discloses cross-flow wind wheel (not shown in the figure) of second aspect embodiment, including the axle cap (not shown in the figure) and the end (not shown in the figure) lid and foretell well fan blade that set up relatively, be equipped with a plurality of well fan blade between axle cap and the end cover.

The utility model discloses wall-hanging air conditioner (not shown in the figure) of third aspect embodiment, including foretell cross-flow wind wheel.

In the description herein, references to the description of the terms "some embodiments" or "conceivably" or the like mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (8)

1. A middle-segment fan blade is characterized by comprising:

the blades are arranged at intervals along the circumferential direction of the middle-section fan blade, each blade is provided with a pressure surface molded line and a suction surface molded line, and a first inscribed circle and a second inscribed circle are arranged between the pressure surface molded line of one blade and the suction surface molded line of the adjacent blade;

one end of the first inscribed circle is connected with one end, close to the middle part of the middle-section fan blade, of the molded line of the suction surface, and the other end of the first inscribed circle is tangent to the molded line of the pressure surface;

one end of the second inscribed circle is connected with one end, far away from the middle part of the middle-section fan blade, of the pressure surface molded line, and the other end of the second inscribed circle is tangent to the suction surface molded line;

the diameter D1 of the first inscribed circle is larger than the diameter D2 of the second inscribed circle.

2. The middle-segment fan blade of claim 1, characterized in that: the acceleration channel coefficient ψ = D1/D2, wherein D1/D2=1.31-1.33.

3. The middle segment of claim 1, wherein: the outlet setting angle of the vanes is defined as β, β =33.5 ° to 34.5 °.

4. The middle-segment fan blade of claim 1, characterized in that: and the included angle of a connecting line between the two ends of the pressure surface molded line and the circle center of the middle segment fan blade is wrap angle alpha, wherein alpha = 7.1-7.7 degrees.

5. The middle-segment fan blade of claim 1, characterized in that: the rotating diameter corresponding to one end, close to the middle part of the middle-section fan, of the plurality of blades is D3, the rotating diameter corresponding to one end, far away from the middle part of the middle-section fan, of the plurality of blades is D4, and D3/D4= 0.73-0.83.

6. The middle-segment wind blade according to any one of claims 1 to 5, characterized in that: the cross section of the blade is of an airfoil structure.

7. A cross-flow wind wheel is characterized by comprising a shaft cover and an end cover which are oppositely arranged and a plurality of middle fan blades according to any one of claims 1 to 6.

8. A wall-mounted air conditioner comprising the cross flow wind wheel of claim 7.

Images