CN214998436U

CN214998436U - Air conditioner

Info

Publication number: CN214998436U
Application number: CN202121290062.2U
Authority: CN
Inventors: 丁超; 赵希枫; 王伟戈; 潘光星
Original assignee: Hisense Shandong Air Conditioning Co Ltd
Current assignee: Hisense Shandong Air Conditioning Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-12-03
Anticipated expiration: 2031-06-09

Abstract

The utility model provides an air conditioner belongs to air treatment technical field. The air conditioner includes a casing with an air inlet and an air outlet; the fan is arranged in the shell and used for forcing air to flow from the air inlet to the air outlet; wherein, axial compressor fan blade of fan includes: a blade having a leading edge, a trailing edge, a suction side and a pressure side; and the wheel hub comprises a circumferential wall, and the outer circumferential surface of the circumferential wall is provided with: a recessed portion having a recessed shape, the recessed portion being provided on a suction surface side of the blade and being close to the leading edge; and the bulge is in a bulge shape and is arranged on the pressure surface side of the blade and close to the tail edge. The air conditioner effectively reduces pneumatic noise by improving the peripheral surface of the hub, and improves the efficiency of the axial flow fan blade.

Description

Air conditioner

Technical Field

The utility model relates to an air treatment technical field especially relates to an air conditioner.

Background

In the related art, most hubs of axial flow fan blades in an air conditioner are in an axial symmetry mode, namely the outermost ring of the hub is a cylindrical surface. Due to the fact that the blades have strong eddy currents in the hub area, the hub in the axial symmetry mode cannot effectively control airflow, and therefore large aerodynamic noise exists.

Disclosure of Invention

The utility model discloses solve one of the technical problem in the correlation technique at least to a certain extent.

Therefore, the air conditioner aims to provide an air conditioner, and the pneumatic noise is effectively reduced through improving the peripheral surface of the hub, so that the efficiency of the axial flow fan blade is improved.

An air conditioner according to the present application includes: a housing having an air inlet and an air outlet formed thereon; the fan is arranged in the shell and used for forcing air to flow from the air inlet to the air outlet; wherein, the axial compressor fan blade of fan includes: a blade having a leading edge, a trailing edge, a suction side and a pressure side; and a hub including a circumferential wall, the circumferential wall being provided on an outer circumferential surface thereof with: a recessed portion having a recessed shape, the recessed portion being provided on the suction surface side of the blade and being close to the leading edge; and a protrusion part in a protrusion shape, the protrusion part being provided on a pressure surface side of the blade and being close to the trailing edge.

Through set up on wheel hub and be located the blade suction face side and be close to the depressed part of leading edge to and set up and be located the blade pressure face side and be close to the bulge of trailing edge, effectively controlled the regional secondary gas flow of wheel hub, can promote axial compressor fan blade efficiency and reduce aerodynamic noise.

According to an embodiment of the air conditioner of the present application, the wall thickness of the recess and the projection on the circumferential wall is uniform.

According to an embodiment of the air conditioner of the present application, the recessed portion and the protruding portion are respectively connected smoothly on the outer circumferential surface of the circumferential wall.

According to the embodiment of the air conditioner, in the axial direction, two opposite ends of the hub are respectively a first end and a second end, wherein the first end is close to the front edge, the second end is close to the tail edge, the minimum distance from the concave part to the first end is smaller than the minimum distance from the concave part to the second end, and the minimum distance from the convex part to the first end is smaller than the minimum distance from the convex part to the second end.

According to an embodiment of the air conditioner of the present application, the blade has an odd number of pieces.

According to the embodiment of the air conditioner of the present application, both sides of each blade have a protrusion and a depression, respectively.

According to the embodiment of the air conditioner, the blade root of the blade is in smooth transition connection with the hub.

According to the embodiment of the air conditioner of this application, the fan still includes: and the motor is connected with the hub to drive the hub to rotate.

According to the embodiment of this application air conditioner, wheel hub is cylindric for having the bobbin base, and the center of bobbin base is equipped with the erection column, is equipped with a plurality of strengthening ribs that are radial distribution between erection column and the circumference wall.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of an axial flow fan blade of an air conditioner according to an embodiment of the present application;

fig. 2 is a perspective view of an alternative perspective view of an axial flow fan blade of an air conditioner according to an embodiment of the present application;

fig. 3 is an expanded model of an axial flow fan blade of an air conditioner according to an embodiment of the present application;

fig. 4 is a side view of an axial-flow fan blade of an air conditioner according to an embodiment of the present application;

FIG. 5 is a perspective view of an axial flow fan blade of the prior art;

in the above figures: 1. axial flow fan blades;

10. a hub; 11. a circumferential wall; 12. a recessed portion; 13. a projection; 14. a cylinder bottom; 141. mounting a column; 15. reinforcing ribs;

20. a blade; 21. a leading edge; 22. a trailing edge; 23. a suction surface; 24. a pressure surface; 25. a blade root.

Detailed Description

The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

In the present application, an air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.

The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.

The air conditioner includes an indoor air conditioner and an outdoor air conditioner, the outdoor air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor or outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater for a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler for a cooling mode.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

An air conditioner generally includes a cabinet having an air inlet and an air outlet, a heat exchanger performing heat exchange with hot air introduced into the cabinet, and a blower fan circulating air to the inside or outside of the cabinet.

The fan comprises a motor and an axial flow fan blade 1, wherein the motor is connected with the axial flow fan blade 1 to drive the axial flow fan blade 1 to rotate.

Fig. 1 is a perspective view of an axial flow fan blade of an air conditioner according to an embodiment of the present application.

Referring to fig. 1, an axial-flow fan blade 1 includes a hub 10 and a blade 20. The hub 10 is substantially cylindrical with a cylindrical bottom 14, and comprises a circumferential wall 11 and a cylindrical bottom 14; the blades 20 are connected to the circumferential wall 11, the mounting post 141 is arranged at the center of the barrel bottom 14, and a plurality of reinforcing ribs 15 distributed in a radial shape are arranged between the mounting post 141 and the circumferential wall 11, so that the strength of the hub 10 is increased, and the service life is prolonged. The center of the mounting post 141 is provided with a mounting hole, and an output shaft of the motor is connected with the mounting hole, thereby driving the hub 10 to rotate.

The blades 20 are typically provided in a plurality and odd number to avoid resonance in an even number. In the present embodiment, three blades 20 are uniformly distributed on the hub 10.

Fig. 5 is a perspective view of an axial-flow fan blade of the prior art.

Referring to fig. 5, the outer peripheral surface of the hub 10 of the axial flow fan blade is an axisymmetrical cylindrical surface, the blade has a large vortex in the hub 10 area, and the airflow flowing around the hub 10 is uneven and can form backflow and turbulent flow, so that great noise is brought, and the experience effect of a user when the user uses an air conditioner is affected.

The axial flow fan blade is improved to improve the noise problem at the hub.

Fig. 2 is a perspective view of an alternative perspective view of an axial flow fan blade of an air conditioner according to an embodiment of the present application; fig. 3 is an expanded model of an axial flow fan blade of an air conditioner according to an embodiment of the present application; fig. 4 is a side view of an axial-flow fan blade of an air conditioner according to an embodiment of the present application.

Referring to fig. 2-4, the blade 20 has opposite leading and trailing

edges

21, 22, and opposite suction and pressure surfaces 23, 24 between the leading and trailing

edges

21, 22.

For the purpose of facilitating an understanding of the present application, the accompanying terms are described in conjunction with the accompanying drawings: the leading edge 21 of the blade is the end of the blade 20 into which air flows and the trailing edge 22 of the blade is the end from which air flows. The suction surface 23 is a convex side surface of the blade 20, and the pressure surface 24 is a concave side surface of the blade 20; the blade root 25 of the blade refers to the portion of the blade 20 that contacts the hub 10.

The circumferential wall 11 is provided with a concave part 12 and a convex part 13; the recessed portion 12 is formed by a portion of the outer circumferential surface of the circumferential wall 11 being recessed inward, and the protruding portion 13 is formed by a portion of the outer circumferential surface of the circumferential wall 11 being protruding outward.

The recessed portion 12 is located on the suction surface 23 side of the blade 20 and near the leading edge 21; the bulge 13 is located on the pressure side 24 of the blade 20 near the trailing edge 22. The inventor of this application adopts the axial fan blade that this application provided and prior art axial fan blade to carry out contrast test, and the experimental data is shown as following table:

it can be seen from the above table that the axial compressor fan blade that this application provided compares in the aspect of the amount of wind and promotes to some extent under the same rotational speed, and the fan blade of this application power consumption, noise obviously reduce in the operation process.

Therefore, the technical scheme of this application has changed gaseous flow distribution through set up depressed part 12 and bulge 13 on wheel hub 10, can effectively control the regional secondary gas flow of wheel hub 10, can promote axial compressor fan blade efficiency and reduce aerodynamic noise.

Each vane 20 has a recess 12 and a protrusion 13 on both sides thereof.

In the axial direction, the two opposite ends of the hub 10 are a first end 10a and a second end 10b, respectively, wherein the first end 10a is the end close to the leading edge 21, and the second end 10b is the end close to the trailing edge 22. The minimum distance from the recess 12 to the first end 10a is smaller than the minimum distance from the recess 12 to the second end 10b, and the minimum distance from the projection 13 to the first end 10a is larger than the minimum distance from the projection 13 to the second end 10 b. This makes it possible to make the concave portion 12 and the convex portion 13 relatively small while ensuring the functions of the concave portion 12 and the convex portion 13.

The concave part 12 and the convex part 13 are respectively connected on the outer circumferential surface of the circumferential wall 11 in a smooth way, so that the smooth and fluent boundary of the concave part 12 and the convex part 13 can be ensured, and the smooth flowing of the air in the area of the hub 10 can be ensured.

The wall thickness of the recesses 12, the protrusions 13 and the other parts of the circumferential wall 11 are uniform, which facilitates the shaping of the hub 10 and avoids stress concentrations.

The blades 20 are connected around the outer circumferential surface of the circumferential wall 11, and the blade roots 25 of the blades are smoothly and transitionally connected with the hub 10, so that the connection strength of the blade roots 25 can be improved.

According to the application, through set up on wheel hub 10 and be located blade suction surface 23 side and be close to the depressed part 12 of leading edge 21 to and set up and be located blade pressure surface 24 side and be close to the bulge 13 of trailing edge 22, effectively controlled the regional secondary gas flow of wheel hub 10, can promote axial compressor fan blade efficiency and reduce aerodynamic noise.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An air conditioner, comprising:

a housing having an air inlet and an air outlet formed thereon;

the fan is arranged in the shell and used for forcing air to flow from the air inlet to the air outlet;

wherein, axial compressor fan blade of fan includes:

a blade having a leading edge, a trailing edge, a suction side and a pressure side; and

wheel hub, including the circumference wall, be equipped with on the circumference surface of circumference wall:

a recessed portion having a recessed shape, the recessed portion being provided on a suction surface side of the blade and being close to the leading edge; and

and the bulge is in a bulge shape and is arranged on the pressure surface side of the blade and close to the tail edge.

2. The air conditioner according to claim 1, wherein the wall thickness of the recess and the projection on the circumferential wall is uniform.

3. The air conditioner according to claim 1, wherein the recessed portion and the projecting portion are respectively connected to an outer peripheral surface of the circumferential wall in a smooth manner.

4. The air conditioner of claim 1, wherein opposite ends of the hub in the axial direction are a first end and a second end, respectively, wherein the first end is proximate the leading edge and the second end is proximate the trailing edge, a minimum distance from the recess to the first end is less than a minimum distance from the recess to the second end, and a minimum distance from the projection to the first end is greater than a minimum distance from the projection to the second end.

5. The air conditioner according to claim 1, wherein the blade has an odd number.

6. The air conditioner according to claim 5, wherein each of the blades has a protrusion and a depression at both sides thereof, respectively.

7. The air conditioner of claim 1, wherein the blade root of the blade is in smooth transition connection with the hub.

8. The air conditioner of claim 1, wherein the fan further comprises: a motor connected with the hub to drive the hub to rotate.

9. The air conditioner of claim 1, wherein the hub is cylindrical with a cylindrical bottom, a mounting post is disposed at the center of the cylindrical bottom, and a plurality of radially-distributed reinforcing ribs are disposed between the mounting post and the circumferential wall.