Impeller assembly and air conditioner

Abstract

The embodiment of the present invention provides an impeller assembly and an air conditioner, which relate to the technical field of air conditioning. The impeller assembly includes a crossflow blade and a wheel disc, the number of the crossflow blades is multiple, and the multiple crossflow blades are arranged along the circumference of the wheel disc, the crossflow blades have an outer diameter and an inner diameter relative to the rotation axis of the impeller assembly, and at least one of the outer diameter and the inner diameter changes linearly along the extension direction of the rotation axis. The above-mentioned impeller assembly and air conditioner have low noise and can effectively reduce the rotation noise of the indoor unit of the air conditioner.

Description

Technical Field

[0001] The present invention relates to the technical field, and in particular to an impeller assembly and an air conditioner. Background Art

[0002] The outlet airflow of the air conditioner's cross-flow impeller blades hits the volute tongue at a high speed, where it separates and causes large momentum and energy changes. At the same time, it also causes large rotation noise. Summary of the invention

[0003] The problem solved by the present invention is that the blades of the cross-flow impeller generate relatively large rotation noise.

[0004] To solve the above problems, the present invention provides an impeller assembly and an air conditioner.

[0005] In a first aspect, an embodiment provides an impeller assembly, comprising a throughflow blade and a wheel disc, wherein the number of the throughflow blades is multiple, and the multiple throughflow blades are arranged along the circumference of the wheel disc, and the throughflow blades have an outer diameter and an inner diameter relative to the rotation axis of the impeller assembly, and at least one of the outer diameter and the inner diameter changes along the extension direction of the rotation axis.

[0006] The impeller assembly provided by the embodiment of the present invention has: at least one of the inner diameter and the outer diameter of the through-flow blade changes in the extension direction of the rotation axis, that is, at least one of the inner diameter and the outer diameter is not a constant value, and the distance between one of the inner side surface and the outer side surface of the through-flow blade and the volute tongue is not constant, so that the aerodynamic performance of the through-flow blade at different positions is inconsistent, thereby destroying the axial periodic action of the impeller assembly and the volute tongue, and reducing the above-mentioned rotation noise.

[0007] In an optional embodiment, at least one of the outer diameter and the inner diameter changes linearly along an extension direction of the rotation axis.

[0008] In an optional embodiment, the outer diameter changes linearly along the extension direction of the rotation axis, and the angle range between the line connecting the outer diameters and the rotation axis is 0 to 5 degrees; and / or, the inner diameter changes linearly along the extension direction of the rotation axis, and the angle range between the line connecting the inner diameters and the rotation axis is -5 to 5 degrees.

[0009] In an optional embodiment, the cross-flow blade has a pressure surface and a suction surface, the pressure surface is opposite to the suction surface, and both the pressure surface and the suction surface are arc-shaped surfaces.

[0010] In an optional embodiment, at least one of the linear lines of the pressure surface and the suction surface is a minimum speed reduction line.

[0011] In an optional embodiment, at least one of the pressure surface and the suction surface satisfies the following linear curve equation:

[0012] x = k*c / (2*π)*(θ-sinθ);

[0013] y=k*c / (2*π)*(1-cosθ);

[0014] Wherein, k is a coefficient, and its value range is 0.1 to 10, c is the chord length of the through-flow blade, and θ is the angle between the line connecting the end points of the median arc of the through-flow blade and its midpoint and the x-direction.

[0015] In an optional embodiment, the impeller assembly also includes at least one middle-section disk, and two adjacent middle-section disks and the wind blades located between the two adjacent middle-section disks form a wind blade section, or, adjacent middle-section disks, the wheel disks, and the wind blades between the adjacent middle-section disks and the wheel disks form the wind blade section; the impeller assembly has at least two wind blade sections, and the blades in at least one of the wind blade sections are the through-flow blades.

[0016] In an optional embodiment, if the number of the middle section disks is an odd number, the impeller assembly is symmetrical relative to the middle section disk located in the middle position; if the number of the middle section disks is an even number, the inner diameter and outer diameter of the blade located in the middle section are constant values.

[0017] In a second aspect, an embodiment provides an impeller assembly for cooperating with a volute tongue of an air conditioner, the impeller assembly comprising a crossflow blade and a wheel disc, the number of the crossflow blades being multiple, and the multiple crossflow blades are arranged along the circumference of the wheel disc and have a rotation axis, the crossflow blades have a first side and a second side relative to each other, the first side is arranged on the outside of the impeller assembly, and the second side is arranged on the inside of the impeller assembly; in the extension direction of the rotation axis, the distance between the first side and the volute tongue changes linearly, and / or the distance between the second side and the volute tongue changes linearly.

[0018] The impeller assembly provided by an embodiment of the present invention has the following characteristics: the distance between at least one of the first side edge and the second side edge of the through-flow blade and the volute tongue is not constant, so that the aerodynamic performance of different positions of the through-flow blade is inconsistent, thereby destroying the axial periodic action of the impeller assembly and the volute tongue and reducing the above-mentioned rotation noise.

[0019] In an optional embodiment, the cross-flow blade has a pressure surface and a suction surface, the pressure surface is opposite to the suction surface, the first side is connected to one end of the pressure surface and the suction surface respectively, the second side is connected to the other end of the pressure surface and the suction surface respectively, and the pressure surface and the suction surface are both curved surfaces.

[0020] In a third aspect, an embodiment provides an air conditioner, comprising an impeller assembly as described in any one of the aforementioned embodiments.

[0021] The beneficial effects of the air conditioner and the above-mentioned impeller assembly are similar, both of which can reduce noise and improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an impeller assembly provided in an embodiment of the present invention;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the impeller assembly in another perspective;

[0024] Figure 3 for Figure 1 Schematic diagram of the structure of the impeller assembly and the volute tongue;

[0025] Figure 4 for Figure 1 Schematic diagram of the structure of the crossflow blade;

[0026] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 6 for Figure 4 A schematic diagram of the structure of the crossflow blade in another perspective;

[0028] Figure 7 for Figure 6 Schematic diagram of the line type of the median arc in the rectangular coordinate system;

[0029] Figure 8 for Figure 1 A schematic diagram of the structure when the number of the middle section disks is an odd number;

[0030] Fig. 9 for Figure 1 A schematic diagram of the structure when the number of middle section disks is an even number.

[0031] Icons: 100-impeller assembly; 101-rotation axis; 11-crossflow blades; 11a-outer diameter; 11b-inner diameter; 11c-pressure surface; 11d-suction surface; 11e-center arc line; 11f-end point; 11g-midpoint; 11h-first side; 11i-second side; 11j-rotation axis direction; 12-wheel disc; 13-middle section disc; 200-volute tongue. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] See also Figure 1 , which shows the structure of an impeller assembly 100 provided by an embodiment of the present invention. The impeller assembly 100 can be used in an air conditioner, for example, in an indoor unit of an air conditioner. The impeller assembly 100 has low rotation noise, can reduce the rotation noise of the air conditioner or the indoor unit of the air conditioner, and is conducive to improving the user experience.

[0034] In the embodiment of the present invention, the impeller assembly 100 includes a crossflow blade 11 and a wheel disc 12. The number of the crossflow blades 11 is multiple, and the multiple crossflow blades 11 are arranged along the circumference of the wheel disc 12 (such as Figure 2 As shown, the crossflow blade 11 has an outer diameter 11a and an inner diameter 11b relative to the rotation axis 101 of the impeller assembly 100, and at least one of the outer diameter 11a and the inner diameter 11b changes along the extension direction of the rotation axis 101.

[0035] It should be noted that the above-mentioned "at least one of the outer diameter 11a and the inner diameter 11b changes along the extension direction of the rotation axis 101" means that at least one of the outer diameter 11a and the inner diameter 11b changes, that is, at least one of the outer diameter 11a and the inner diameter 11b is not a constant value, that is, at least one of the outer diameter 11a and the inner diameter 11b has two or more values. The outer diameter 11a of the throughflow blade 11 refers to the distance between the outer side of the throughflow blade 11 and the rotation axis 101, and the inner diameter 11b of the throughflow blade 11 refers to the distance between the inner side of the throughflow blade 11 and the rotation axis 101.

[0036] See also Figure 3 At the same time, it should be noted that the impeller assembly 100 cooperates with the volute 200 of the air conditioner, and the impeller assembly 100 and the volute 200 are arranged at intervals. When at least one of the outer diameter 11a and the inner diameter 11b changes along the extension direction of the rotation axis 101, the distance between the corresponding one of the inner side surface and the outer side surface of the flow blade 11 and the volute 200 also changes. That is, if the outer diameter 11a changes in the extension direction of the rotation axis 101, the distance between the outer side of the flow blade 11 and the volute 200 also changes; if the inner diameter 11b changes in the extension direction of the rotation axis 101, the distance between the inner side of the flow blade 11 and the volute 200 also changes. In other words, the distance between at least one of the outer side surface and the inner side surface of the blade and the volute 200 on the rotation axis 101 is not a constant value.

[0037] Furthermore, it should be understood that the distance between the volute tongue 200 and the rotation axis 101 is constant. When the transflow blade 11 is located between the volute tongue 200 and the rotation axis 101, when at least one of the outer diameter 11a and the inner diameter 11b changes along the extension direction of the rotation axis 101, the distance between the corresponding one of the inner side surface and the outer side surface of the transflow blade 11 and the volute tongue 200 also changes, and the change is opposite to the change trend of the inner diameter 11b and the outer diameter 11a. For example, if the outer diameter 11a increases in the extension direction of the rotation axis 101, the distance between the outer side of the transflow blade 11 and the volute tongue 200 decreases; if the outer diameter 11a decreases in the extension direction of the rotation axis 101, the distance between the outer side of the transflow blade 11 and the volute tongue 200 increases.

[0038] In the prior art, the blades of the impeller are evenly distributed around the circumference of the wheel disc 12, and a strong periodic effect will be generated between the blades and the volute tongue 200, resulting in a large rotation noise. In the embodiment of the present invention, at least one of the inner diameter 11b and the outer diameter 11a of the through-flow blade 11 changes in the extension direction of the rotation axis 101, that is, at least one of the inner diameter 11b and the outer diameter 11a is not a constant value, and the distance between one of the inner side surface and the outer side surface of the through-flow blade 11 and the volute tongue 200 is not constant, so that the aerodynamic performance of different positions of the through-flow blade 11 is inconsistent, thereby destroying the axial periodic effect between the impeller assembly 100 and the volute tongue 200 and reducing the above-mentioned rotation noise.

[0039] See also Figure 4 In an optional embodiment, at least one of the outer diameter 11a and the inner diameter 11b changes linearly along the extension direction of the rotation axis 101. That is, at least one of the outer diameter 11a and the inner diameter 11b increases or decreases linearly along the extension direction of the rotation axis 101.

[0040] It should be understood that at least one of the outer diameter 11a and the inner diameter 11b increases or decreases linearly along the extension direction of the rotation axis 101. On the one hand, it can facilitate the manufacture of the throughflow blade 11. On the other hand, the linear change of at least one of the outer diameter 11a and the inner diameter 11b can destroy the periodicity between the throughflow blade 11 and the volute tongue 200 while reducing the influence of wind on the throughflow blade 11, that is, ensuring the performance and service life of the throughflow blade 11 and improving the reliability of the throughflow blade 11.

[0041] See also Figure 5 , further, the outer diameter 11a changes linearly along the extension direction of the rotation axis 101, and the angle between the line of the outer diameter 11a and the rotation axis 101 is in the range of 0 to 5 degrees, that is, Figure 5 The angle range of a1 is 0 to 5 degrees.

[0042] It should be noted that the “line of the outer diameter 11a” here refers to the line on the through-flow blade 11. Since the outer diameter 11a changes linearly, the size of the outer diameter 11a is a plurality of sets of values ​​that change continuously from large to small. The line of the outer diameter 11a can be understood as the straight line on which the outer surface of the through-flow blade 11 is located.

[0043] At the same time, it should be understood that the angle between the line of the outer diameter 11a and the rotation axis 101 is in the range of 0 to 5 degrees, which can ensure that the distance between the air outlet of the throughflow blade 11 and the volute tongue 200 is appropriate, and the change of the outer diameter 11a is within a reasonable range, thereby ensuring the air volume.

[0044] Furthermore, in the embodiment of the present invention, the inner diameter 11b changes linearly along the extension direction of the rotation axis 101, and the angle between the line connecting the inner diameter 11b and the rotation axis 101 is in the range of -5 to 5 degrees, that is, Figure 5 The angle range of a2 is -5 to 5 degrees.

[0045] It should be noted that the angle between the line connecting the inner diameter 11b and the rotation axis 101 ranges from -5 to 5 degrees, wherein when the line connecting the inner diameter 11b is above the rotation axis direction 11j, the angle between the line connecting the inner diameter 11b and the rotation axis 101 takes a negative value; when the line connecting the inner diameter 11b is below the rotation axis direction 11j, the angle between the line connecting the inner diameter 11b and the rotation axis 101 takes a positive value. The rotation axis direction 11j extends from one end to the other end of the crossflow blade 11, and the rotation axis direction 11j is parallel to the rotation axis 101, but not colinear.

[0046] At the same time, it should be understood that the angle between the line connecting the inner diameter 11 b and the rotation axis 101 is in the range of -5 to 5 degrees, which can ensure the size of the crossflow blade 11 while taking into account the efficiency and air volume of the impeller assembly 100 .

[0047] See also Figure 6 In the embodiment of the present invention, the above-mentioned cross-flow blade 11 has a pressure surface 11c and a suction surface 11d, the pressure surface 11c is opposite to the suction surface 11d, and the pressure surface 11c and the suction surface 11d are both arc-shaped surfaces.

[0048] Meanwhile, the through-flow blade 11 also has a median camber line 11 e . Optionally, the pressure surface 11 c , the suction surface 11 d and the median camber line 11 e have the same line shape.

[0049] Furthermore, at least one of the linear lines of the pressure surface 11c and the suction surface 11d is a minimum deceleration line, so that the airflow flows out of the flow channel in the shortest time, reduces the residence time of the airflow in the flow channel, and reduces the airflow blockage of the flow channel. In the embodiment of the present invention, the linear lines of the pressure surface 11c, the suction surface 11d and the middle arc line 11e are all minimum deceleration lines.

[0050] See also Figure 7In an optional embodiment, at least one of the pressure surface 11c and the suction surface 11d satisfies the following linear curve equation:

[0051] x = k*c / (2*π)*(θ-sinθ);

[0052] y=k*c / (2*π)*(1-cosθ);

[0053] Wherein, k is a coefficient, and its value range is 0.1 to 10, c is the chord length of the through-flow blade 11, that is, the straight-line distance between the two end points 11f of the median arc 11e, and θ is the angle between the line connecting the end points 11f of the median arc 11e of the through-flow blade 11 and its midpoint 11g and the x-direction, which is the x-direction of the rectangular coordinate system as shown in the figure.

[0054] It should be noted that the rectangular coordinate system is established with one of the endpoints of the pressure surface 11c, the suction surface 11d and the median arc 11e as the origin, the chord length direction as the x-axis, and the direction perpendicular to the chord length as the y-axis.

[0055] In the embodiment of the present invention, the line shapes of the pressure surface 11c, the suction surface 11d and the median arc line 11e all satisfy the above-mentioned line curve equation.

[0056] In an optional embodiment, the impeller assembly 100 includes at least one middle section disk 13, and two adjacent middle section disks 13 and the wind blades located between the two adjacent middle section disks 13 form a wind blade section, or, adjacent middle section disks 13, wheel disks 12 and the wind blades between adjacent middle section disks 13 and wheel disks 12 form a wind blade section; the impeller assembly 100 has at least two wind blade sections, and the blades in at least one wind blade section are through-flow blades 11 to reduce the noise generated by the wind blade section.

[0057] It should be noted that, in the embodiment of the present invention, the blades located on the same wind blade section are blades of substantially the same structure.

[0058] It should be understood that when the number of the wind blade sections is one, the wind blade section is formed by the wheel discs at both ends and the blades located between the wheel discs, and the blades are the above-mentioned through-flow blades 11. When the number of the wind blade sections is two or more, the impeller assembly 100 further includes at least one middle section disk 13, and two adjacent middle section disks 13 and the blades located between the two adjacent middle section disks 13 form a wind blade section, or adjacent middle section disks 13, wheel discs 12 and the blades between the adjacent middle section disks 13 and wheel discs 12 form a wind blade section; the through-flow blades 11 are arranged circumferentially along at least one of the at least one middle section disks 13. That is, among the above-mentioned wind blade sections, the blades in at least one wind blade section are the above-mentioned through-flow blades 11.

[0059] If the number of the middle section disks 13 is an odd number, the impeller assembly 100 is symmetrical with respect to the middle section disk 13; if the number of the middle section disks 13 is an even number, the inner diameter 11b and the outer diameter 11a of the blade of the middle blade section are constant.

[0060] Optionally, the impeller assembly 100 is symmetrically arranged. Figure 8 If the number of the middle section disks 13 is an odd number, that is, the number of the blade sections of the impeller assembly 100 is an even number, the impeller assembly 100 is symmetrical relative to the middle section disk 13; please refer to Fig. 9 If the number of middle section disks 13 is an even number, that is, the number of blade sections of the impeller assembly 100 is an odd number, the inner diameter 11b and the outer diameter 11a of the blade located in the middle section are constant. The above arrangement can ensure that the force of the entire impeller assembly 100 is stable, thereby ensuring the service life of the impeller assembly 100 and reducing the probability of failure.

[0061] See also Figure 4 and Figure 6 The cross-flow blade 11 has a relative first side 11h and a second side 11i, the first side 11h is arranged on the outside of the impeller assembly 100, and the second side 11i is arranged on the inside of the impeller assembly 100; in the extension direction of the rotation axis 101, the distance between the first side 11h and the volute tongue 200 changes linearly, and / or the distance between the second side 11i and the volute tongue 200 changes linearly.

[0062] Furthermore, the cross-flow blade 11 has a pressure surface 11c and a suction surface 11d, the pressure surface 11c is opposite to the suction surface 11d, the first side 11h is respectively connected to one end of the pressure surface 11c and the suction surface 11d, and the second side 11i is respectively connected to the other end of the pressure surface 11c and the suction surface 11d, and the pressure surface 11c and the suction surface 11d are both arcuate surfaces.

[0063] The embodiment of the present invention further provides an air conditioner, comprising an impeller assembly 100 as described in any of the above embodiments. The impeller assembly 100 can be installed in an indoor unit of the air conditioner to reduce the noise of the indoor unit and improve the user experience.

[0064] Please refer to Figures 1 to 9The impeller assembly 100 and the air conditioner provided by the embodiment of the present invention: at least one of the inner diameter 11b and the outer diameter 11a of the throughflow blade 11 changes in the extension direction of the rotation axis 101, that is, at least one of the inner diameter 11b and the outer diameter 11a is not a constant value, and the distance between one of the inner side surface and the outer side surface of the throughflow blade 11 and the volute tongue 200 is not constant, or the distance between at least one of the first side edge 11h and the second side edge 11i of the throughflow blade 11 and the volute tongue 200 is not constant, so that the aerodynamic performance of different positions of the throughflow blade 11 is inconsistent, thereby destroying the axial periodic action of the impeller assembly 100 and the volute tongue 200 and reducing the above-mentioned rotation noise.

[0065] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An impeller assembly, comprising a crossflow blade (11) and a wheel disc (12), wherein the number of the crossflow blade (11) is multiple, and the multiple crossflow blades (11) are arranged along the circumference of the wheel disc (12), characterized in that: The crossflow blade (11) has an outer diameter (11a) and an inner diameter (11b) relative to the rotation axis (101) of the impeller assembly (100), and at least one of the outer diameter (11a) and the inner diameter (11b) changes along the extension direction of the rotation axis (101); the crossflow blade (11) has a pressure surface (11c) and a suction surface (11d), the pressure surface (11c) is opposite to the suction surface (11d), and both the pressure surface (11c) and the suction surface (11d) are arc-shaped surfaces; at least one of the pressure surface (11c) and the suction surface (11d) satisfies the following linear curve equation: x = k*c / (2*π)*(θ-sinθ); y=k*c / (2*π)*(1-cosθ); Wherein, k is a coefficient, and its value range is 0.1 to 10; c is the chord length of the crossflow blade (11); θ is the angle between the line connecting the end points (11f) of the middle arc line (11e) of the crossflow blade (11) and its midpoint (11g) and the x direction, and the x direction is the direction of the x-axis in a rectangular coordinate system.

2. The impeller assembly according to claim 1, characterized in that: At least one of the outer diameter (11a) and the inner diameter (11b) changes linearly along the extending direction of the rotation axis (101).

3. The impeller assembly according to claim 1 or 2, characterized in that: The outer diameter (11a) changes linearly along the extension direction of the rotation axis (101), and the angle between the line connecting the outer diameter (11a) and the rotation axis (101) is in the range of 0 to 5 degrees; and / or the inner diameter (11b) changes linearly along the extension direction of the rotation axis (101), and the angle between the line connecting the inner diameter (11b) and the rotation axis (101) is in the range of -5 to 5 degrees.

4. The impeller assembly according to claim 1, characterized in that: At least one of the linear lines of the pressure surface (11c) and the suction surface (11d) is a minimum speed reduction line.

5. The impeller assembly according to claim 1, characterized in that: The impeller assembly (100) further comprises at least one middle section disc (13), two adjacent middle section discs (13) and the wind blades between the two adjacent middle section discs (13) form a wind blade subsection, or adjacent middle section discs (13), the wheel disc (12) and the wind blades between the adjacent middle section discs (13) and the wheel disc (12) form the wind blade subsection; the impeller assembly has at least two wind blade subsections, and the blades in at least one of the wind blade subsections are the through-flow blades (11).

6. The impeller assembly according to claim 5, characterized in that: If the number of the middle section disks (13) is an odd number, the impeller assembly (100) is symmetrical relative to the middle section disk (13) located in the middle position; if the number of the middle section disks (13) is an even number, the inner diameter (11b) and the outer diameter (11a) of the blade located in the middle section are constant values.

7. An impeller assembly for cooperating with a volute (200) of an air conditioner, the impeller assembly (100) comprising a crossflow blade (11) and a wheel (12), the number of the crossflow blade (11) being multiple, and the multiple crossflow blades (11) being arranged along the circumference of the wheel (12) and having a rotation axis (101), characterized in that: The cross-flow blade (11) has a first side edge (11h) and a second side edge (11i) relative to each other, wherein the first side edge (11h) is arranged on the outside of the impeller assembly (100), and the second side edge (11i) is arranged on the inside of the impeller assembly (100); in the extension direction of the rotation axis (101), the distance between the first side edge (11h) and the volute tongue (200) changes linearly, and / or the distance between the second side edge (11i) and the volute tongue (200) changes linearly.

8. The impeller assembly according to claim 7, characterized in that: The cross-flow blade (11) comprises a pressure surface (11c) and a suction surface (11d); the pressure surface (11c) is opposite to the suction surface (11d); the first side edge (11h) is respectively connected to one end of the pressure surface (11c) and the suction surface (11d); the second side edge (11i) is respectively connected to the other end of the pressure surface (11c) and the suction surface (11d); and the pressure surface (11c) and the suction surface (11d) are both arc-shaped surfaces.

9. An air conditioner, characterized in that: The invention comprises an impeller assembly (100) according to any one of claims 1 to 8.

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