Air Duct Assembly, Cross-Flow Fan and Air Conditioning Device

Abstract

The present disclosure relates to an air duct assembly, a cross-flow fan, and an air conditioning device. The air duct assembly includes a volute, a volute tongue, and an impeller. The volute tongue includes a first portion and a second portion. The first portion cooperates with the volute to surround the impeller, and an air outlet is formed between the second portion and the volute. ∠α = ∠β, where ∠α is the angle formed by connection line OA and connection line OC, and ∠β is the angle formed by connection line OB and connection line OC. O is the center point of the radial cross-section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first portion closest to the center point O, and C is the point on the extension line of the second portion closest to the center point O. In the present disclosure, the angles are set to reduce the air intake resistance and smoothly blow out the air so as to enable uniform air supply and stable operation of the air duct assembly.

Description

Technical Field

[0001] This disclosure claims priority based on Chinese Patent Application No. 202210635433.9 filed on June 7, 2022, the entire disclosure of which is incorporated herein by reference.

[0002] This disclosure relates to the field of air conditioning technology, and particularly to an air duct assembly, a cross-flow fan, and an air conditioning device.

Background Art

[0003] Cross-flow fans have advantages such as uniform air supply, low energy consumption, and a compact structure, so they are widely applied in household electrical appliances such as wall-mounted air conditioners and cabinet air conditioners. Furthermore, due to their wide air supply range, the temperature balance of the cabinet can be better achieved, so their application has begun in the refrigeration industry. In some related technologies, there is a volute of a cross-flow fan that uses die sinking injection mold, which has problems such as high cost and long machining cycle.

Summary of the Invention

Means for Solving the Problems

[0004] In one aspect of this disclosure, an air duct assembly is provided. The air duct assembly includes a volute, a volute tongue, and an impeller. The volute tongue includes a first part and a second part. The first part cooperates with the volute to surround the impeller, and an air outlet is formed between the second part and the volute. ∠α = ∠β, where ∠α is the angle formed by connection line OA and connection line OC, and ∠β is the angle formed by connection line OB and connection line OC. O is the center point of the radial cross-section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first part closest to the center point O, and C is the point on the extension line of the second part closest to the center point O.

[0005] In some embodiments, the connecting line OA is perpendicular to the axis of the impeller.

[0006] In some embodiments, C is also a point on the impeller, and the extension line of the second portion is a tangent line to the radial cross-section of the impeller at point C.

[0007] In some embodiments, the volute includes a head section and a tail section formed by bending a sheet metal member, and at least two intermediate sections positioned between the head section and the tail section.

[0008] In some embodiments, the head section is positioned at the location of the air inlet of the air duct assembly at the upper part of the volute, the tail section is positioned at the location of the air outlet of the air duct assembly at the laterally lower part of the volute, and the angle formed by the tangent line passing through the apex of the head section and the tangent line passing through the outermost point of the tail section is ∠γ, and ∠γ = 90° ± 5°.

[0009] In some embodiments,

Number

[0010] In some embodiments, the value range of ∠d i is selected to be (90°, 180°).

[0011] In some embodiments, 40° ≤ ∠θ ≤ 60°, where ∠θ is the included angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute along the radial direction of the air duct assembly.

[0012] In some embodiments, 20° ≤ ∠ε ≤ 40°, where ∠ε is the angle formed by the connecting line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue along the radial direction of the air duct assembly.

[0013] In some embodiments, the air duct assembly further includes at least two air flow deflectors, the at least two air flow deflectors are spaced apart at the air outlet, and all the air flow deflectors are respectively connected to the second part.

[0014] In some embodiments, the air duct assembly further includes a first side plate and a second side plate formed of sheet metal members, the first side plate is connected to the first side of the volute and the volute tongue, the second side plate is connected to the second side of the volute and the volute tongue, and the second side is opposite to the first side.

[0015] In some embodiments, the impeller includes a head end segment, a tail end segment, and at least one intermediate segment continuously disposed between the head end segment and the tail end segment.

[0016] In some embodiments, the volute tongue is a member formed by bending a sheet metal member.

[0017] In one aspect of the present disclosure, a cross-flow fan is provided. The cross-flow fan includes the air duct assembly described above.

[0018] In one aspect of the present disclosure, an air conditioning device is provided. The air conditioning device includes the cross-flow fan described above.

[0019] In some embodiments, the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

[0020] In one aspect of the present disclosure, an air duct assembly is provided. The air duct assembly includes a volute, and the volute includes a head section, a tail section, and at least two intermediate sections positioned between the head section and the tail section. The head section is positioned at the air inlet of the air duct assembly at the upper part of the volute, and the tail section is positioned at the air outlet of the air duct assembly at the laterally lower part of the volute. The angle formed by the tangent line passing through the apex of the head section and the tangent line passing through the outermost point of the tail section is ∠γ, and ∠γ = 90° ± 5°.

[0021] In some embodiments, the volute is configured to form the head section, the tail section, and at least two intermediate sections by bending a sheet metal member multiple times.

Number

[0022] In some embodiments, the value range of ∠d i is selected to be (90°, 180°).

[0023] In some embodiments, the air duct assembly further includes a volute tongue and an impeller. The volute tongue includes a first portion and a second portion. The first portion cooperates with the volute to surround the impeller, and an air outlet is formed between the second portion and the volute.

[0024] In some embodiments, ∠α = ∠β. ∠α is the angle formed by the connecting line OA and the connecting line OC, and ∠β is the angle formed by the connecting line OB and the connecting line OC. O is the center point of the radial cross-section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first portion closest to the center point O, and C is the point on the extension line of the second portion closest to the center point O.

[0025] In some embodiments, the connecting line OA is perpendicular to the axis of the impeller.

[0026] In some embodiments, C is also a point on the impeller, and the extension line of the second portion is the tangent to the radial cross-section of the impeller at point C.

[0027] In some embodiments, 40° ≤ ∠θ ≤ 60°. ∠θ is the angle formed by the connecting line CD and the horizontal line L1. C is the head end point on the cross-section of the volute along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute along the radial direction of the air duct assembly.

[0028] In some embodiments, 20° ≤ ∠ε ≤ 40°. ∠ε is the angle formed by the connecting line EF and the horizontal line L2. E is the head end point on the cross-section of the volute tongue along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue along the radial direction of the air duct assembly.

[0029] In some embodiments, the air duct assembly further includes at least two air deflectors, the at least two air deflectors are spaced apart at the air outlet, and all the air deflectors are each connected to the second portion.

[0030] In some embodiments, the air duct assembly further includes a first side plate and a second side plate formed of sheet metal members, the first side plate is connected to the first side of the volute and the volute tongue, and the second side plate is connected to the second side of the volute and the volute tongue, and the second side is opposite to the first side.

[0031] In some embodiments, the impeller includes a head end segment, a tail end segment, and at least one intermediate segment continuously disposed between the head end segment and the tail end segment.

[0032] In some embodiments, the air duct assembly further includes a volute tongue formed by bending a sheet metal member.

[0033] In one aspect of the present disclosure, a cross-flow fan is provided. The cross-flow fan includes the air duct assembly described above.

[0034] In one aspect of the present disclosure, an air conditioning device is provided. The air conditioning device includes the cross-flow fan described above.

[0035] In some embodiments, the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

[0036] In one aspect of the present disclosure, a cross-flow fan is provided. The cross-flow fan includes a volute formed by bending a sheet metal member, the volute including a head section, a tail section, and at least two intermediate sections positioned between the head section and the tail section, and angles formed by the head section and an adjacent intermediate section, an angle formed by the tail section and an adjacent intermediate section, and an angle formed by two adjacent intermediate sections are all greater than 0 degrees.

[0037] In some embodiments, the cross-flow fan further includes a volute tongue and an impeller. The volute tongue includes a first portion and a second portion. The first portion cooperates with the volute to surround the impeller, and an air outlet is formed between the second portion and the volute.

[0038] In some embodiments, ∠α = ∠β, where ∠α is the angle formed by connecting line OA and connecting line OC, ∠β is the angle formed by connecting line OB and connecting line OC, O is the center point of the radial cross-section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first portion closest to the center point O, and C is the point on the extension line of the second portion closest to the center point O.

[0039] In some embodiments, the connecting line OA is perpendicular to the axial direction of the impeller.

[0040] In some embodiments, C is also a point on the impeller, and the extension line of the second portion is the tangent to the radial cross-section of the impeller at point C.

[0041] In some embodiments, the head section is positioned at the location of the air inlet of the cross-flow fan at the upper part of the volute, the tail section is positioned at the location of the air outlet of the cross-flow fan in the lateral part of the volute, and the angle formed by the tangent passing through the vertex of the head section and the tangent passing through the outermost point of the tail section is ∠γ, and ∠γ = 90° ± 5°.

[0042] In some embodiments, [Number] where n is the number of bends of the volute, n ≧ 3, and ∠d i is the angle of the i-th bend, and the value range of i is selected from 1 to n.

[0043] In some embodiments, ∠d i is selected to have a value range of (90°, 180°).

[0044] In some embodiments, 40° ≦ ∠θ ≦ 60°, where ∠θ is the angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute along the radial direction of the cross-flow fan, and D is the tail end point on the cross-section of the volute along the radial direction of the cross-flow fan.

[0045] In some embodiments, 20° ≦ ∠ε ≦ 40°, where ∠ε is the angle formed by the connecting line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue along the radial direction of the cross-flow fan, and F is the tail end point on the cross-section of the volute tongue along the radial direction of the cross-flow fan.

[0046] In some embodiments, the cross-flow fan further includes at least two air flow deflectors, the at least two air flow deflectors are arranged at intervals at the air outlet, and all the air flow deflectors are respectively connected to the second part.

[0047] In some embodiments, the cross-flow fan further includes a first side plate and a second side plate formed of sheet metal members. The first side plate is connected to the first side of the volute and the volute tongue, and the second side plate is connected to the second side of the volute and the volute tongue, where the second side is opposite to the first side.

[0048] In some embodiments, the impeller includes a head end segment, a tail end segment, and at least one intermediate segment continuously disposed between the head end segment and the tail end segment.

[0049] In some embodiments, the cross-flow fan further includes a volute tongue formed by bending a sheet metal member.

[0050] In one aspect of the present disclosure, a cross-flow fan is provided. The cross-flow fan includes the cross-flow fan described above.

[0051] In some embodiments, the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

[0052] Based on the above-described technical solutions, the present disclosure has at least the following advantageous effects.

[0053] In some embodiments, the cross-flow fan includes a volute, a volute tongue, and an impeller. The volute tongue includes a first portion and a second portion. The first portion cooperates with the volute to surround the impeller, and an air outlet is formed between the second portion and the volute. ∠α = ∠β, where ∠α is the angle formed by connection line OA and connection line OC, and ∠β is the angle formed by connection line OB and connection line OC. O is the center point of the radial cross-section of the impeller, A is the point on the volute closest to the center point O, B is the point on the first portion closest to the center point O, and C is the point on the extension line of the second portion closest to the center point O. The angles are set to reduce air intake resistance and smoothly blow out air so as to enable uniform air supply and stable operation of the cross-flow fan.

[0054] In some embodiments, the volute of the air duct assembly includes a head section, a tail section, and at least two intermediate sections positioned between the head section and the tail section. The head section is positioned at the location of the air inlet of the air duct assembly at the upper part of the volute, and the tail section is positioned at the location of the air outlet of the air duct assembly at the lateral lower part of the volute. The angle formed by the tangent line passing through the apex of the head section and the tangent line passing through the outermost point of the tail section is ∠γ, and ∠γ = 90° ± 5°. The angle is set to facilitate a smooth air outlet of the air duct assembly.

[0055] In some embodiments, the volute of the cross-flow fan is formed by bending a sheet metal member at least three times. Compared with the machining process of die engraving, the bending of the sheet metal is simpler and has a lower cost. Furthermore, the sheet metal has suitable plasticity with an easily adjustable structure, thereby improving the diversity of the overall mechanical structural dimensions of the cross-flow fan and adapting it to different application environments.

[0056] The accompanying drawings described herein are intended to provide a further understanding of the present disclosure and constitute a part of this application. The exemplary embodiments of the present disclosure and their descriptions are intended to explain the present disclosure and do not constitute an inappropriate definition of the present disclosure.

Brief Description of the Drawings

[0057]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0058] In the following, in connection with the accompanying drawings in the embodiments of the present disclosure, the technical solution in the embodiments is clearly and completely described. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all of the embodiments of the present disclosure. All other embodiments obtained by those skilled in the art on the premise of not involving inventive efforts based on the embodiments of the present disclosure shall be related to the protection scope of the present disclosure.

[0059] In the description of the present disclosure, the directional or positional relationships indicated by terms such as "center", "transverse direction", "longitudinal direction", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper part", "bottom part", "inner", and "outer" are based on the directional or positional relationships shown in the drawings, and do not indicate or imply that the device or element mentioned must have a specific orientation or must be configured and operated in a specific orientation. It is only for facilitating the description of the present disclosure and simplifying the description, and it should not be understood as limiting the protection scope of the present disclosure.

[0060] Referring to FIGS. 1 and 2, in some embodiments, the cross-flow fan includes a volute 1 formed by bending a sheet metal member, and the volute 1 includes a head section 11, a tail section 12, and at least two intermediate sections 13 positioned between the head section 11 and the tail section 12. The head section 11, the at least two intermediate sections 13, and the tail section 12 are connected in sequence.

[0061] The angle formed by the head section 11 and the adjacent intermediate section 13 is greater than 0 degrees. The angle formed by the tail section 12 and the adjacent intermediate section 13 is greater than 0 degrees. Furthermore, the angle formed by two adjacent intermediate sections is greater than 0 degrees.

[0062] In some related technologies, the volute is made by molding, and it is necessary to perform pre-carving. Furthermore, the carving takes time and is costly, and the overall machine of the cross-flow fan formed by the volute has a limited structure, so it cannot be adapted to different application environments.

[0063] Based on the above, the volute 1 of the cross-flow fan provided by the embodiments of the present disclosure is formed by bending a sheet metal member. Compared with the machining process of die engraving, the bending of the sheet metal is simpler and also has a lower cost. Furthermore, the sheet metal has suitable plasticity with an easily adjustable structure, thereby improving the diversity of the overall mechanical structural dimensions of the cross-flow fan and adapting it to different application environments.

[0064] Since the volute 1 includes a head section 11, a tail section 12, and at least two intermediate sections 13 positioned between the head section 11 and the tail section 12, the volute 1 includes at least three bends, that is, the number of bends n of the volute is n≧3, which can improve the uniform air supply. Of course, the smoother the contour of the volute 1 after being bent multiple times, the better.

[0065] The head section 11 of the volute 1 is located at the position of the air inlet 8, and the tail section 12 is located at the position of the air outlet 7.

[0066] In some embodiments, the cross-flow fan further includes a volute tongue 2 and an impeller 3. The volute tongue 2 includes a first portion 21 and a second portion 22. The first portion 21 cooperates with the volute 1 to surround the impeller 3, and an air inlet 8 is formed between the end of the first portion 21 away from the second portion 22 and the volute 1. An air outlet 7 of the cross-flow fan is formed between the second portion 22 and the volute 1.

[0067] The first portion 21 cooperates with the volute 1 to surround the impeller 3, an air inlet 8 of the cross-flow fan is formed between the first portion 21 and the volute 1, and an air outlet 7 of the cross-flow fan is formed between the second portion 22 and the volute 1. The volute tongue 2 and the volute 1 form an enclosing curve of the impeller 3, which improves the uniform air supply.

[0068] In some embodiments, the cross-flow fan further includes a volute tongue portion 2 formed by bending a sheet metal member.

[0069] The volute tongue portion 2 is formed by bending a sheet metal member. Compared with the machining process of die engraving, the bending of the sheet metal is simpler and also has a lower cost. Furthermore, the sheet metal has suitable plasticity with an easily adjustable structure, thereby improving the diversity of the overall mechanical structural dimensions of the cross-flow fan and adapting it to different application environments.

[0070] The first portion 21 of the volute tongue portion 2 includes at least two bends, and the first portion 21 and the second portion 22 are also formed by bending therebetween.

[0071] Referring to FIGS. 2 and 3, the volute 1 surrounds the upper portion of the impeller 3 and one side portion of the impeller 3 away from the air inlet 8, and the first portion 21 surrounds the lower portion of the impeller 3. An air outlet 7 is formed between the second portion 22 and the volute 1. One end of the first portion 21 is positioned at the air inlet 8, the other end of the first portion 21 is connected to the second portion 22, and the second portion 22 is inclined away from the volute 1 downward toward the first portion 21. The opening of the air outlet 7 gradually increases along the flow direction of the air flow.

[0072] Regarding the orientations of the "upper portion", "lower portion", "upper part", "bottom part" and "side part" of the volute 1 in the embodiments of the present disclosure, the corresponding orientations of the cross-flow fan in a state where the axial direction of the cross-flow fan is substantially parallel to the horizontal plane and the air outlet of the cross-flow fan faces downward can be referred to.

[0073] Referring to FIG. 2, in some embodiments, ∠α = ∠β, where ∠α is the angle formed by connecting line OA and connecting line OC, ∠β is the angle formed by connecting line OB and connecting line OC, O is the center point of the radial cross-section of the impeller 3, A is the point on the volute 1 closest to the center point O, and B is the point on the first portion 21 closest to the center point O.

[0074] After the volute 1, the volute tongue portion 2, and the impeller 3 are assembled, ∠AOB is the range angle of the air inlet 8, and ∠α = ∠β, which can minimize the suction resistance, thereby enabling uniform air supply and stable operation of the cross-flow fan.

[0075] In some embodiments, the connecting line OA is perpendicular to the axial direction of the impeller 3.

[0076] The point A on the volute 1 closest to the center point O is positioned directly above the impeller 3, and the connecting line OA is perpendicular to the axial direction of the impeller 3, which can meet the installation requirements and lead to uniform air supply.

[0077] In some embodiments, point C is also a point on the impeller 3, and the extension line of the second portion 22 is a tangent to the radial cross-section of the impeller 3 at point C.

[0078] Referring to FIG. 3, in some embodiments, the head section 11 is positioned at the location of the air inlet 8 of the cross-flow fan at the upper part of the volute 1, and the tail section 12 is positioned at the location of the air outlet 7 of the cross-flow fan at the side of the volute 1. The angle formed by the tangent passing through the apex of the head section 11 and the tangent passing through the outermost point of the tail section 12 is ∠γ, and ∠γ = 90° ± 5°.

[0079] The head section 11 is positioned above the volute 1, and the apex of the head section 11 corresponds to the apex of the head section 11. The tail section 12 is positioned on the side of the volute 1, and the outermost point of the tail section 12 corresponds to the point on the tail section 12 that is farthest from the volute tongue 2.

[0080] When the cross-flow fan is installed in the housing, the cross-flow fan is generally positioned in the included angle area between the upper plate and the rear plate of the housing. The upper part of the volute 1 is close to the upper plate of the housing, and the side part of the volute 1 is close to the rear plate of the housing. The angle ∠γ formed by the tangent line of the apex of the head section 11 and the tangent line of the outermost point of the tail section 12 is the installation angle, and ∠γ = 90° ± 5°. The installation angle can increase the usable space in the housing. Since the installation angle is designed to be 90° ± 5° here, the volute 1 is in close contact with the housing, and the operation of the overall machine is more stable. Furthermore, it is possible to avoid the gap in contact, as well as problems such as air leakage, noise generation, and product performance degradation during use.

[0081] In some embodiments, on the cross-section of the volute 1 along the radial direction of the cross-flow fan, the distance between each intermediate section 13 and the impeller 3 increases in sequence along the direction from the head section 11 to the tail section 12.

[0082] In some embodiments, both the head section 11 and the tail section 12 are planar sections. On the cross-section of the volute 1 along the radial direction of the cross-flow fan, the extension line of the head section 11 is on the same straight line as the tangent line passing through the apex of the head section 11, and the extension line of the tail section 12 is on the same straight line as the tangent line passing through the outermost point of the tail section 12. Therefore, the angle formed by the extension line of the head section 11 and the extension line of the tail section 12 is also ∠γ, and ∠γ = 90° ± 5°.

[0083] Alternatively, the head section 11 is a horizontal section and the tail section 12 is a vertical section.

[0084] In some embodiments,

Number

[0085] The number of turns of the volute 1 is more than or equal to 3, and the angle at each turn is reasonably selected, which can make the contour of the volute 1 more bow-shaped and lead to a uniform air outlet.

[0086] In some embodiments, ∠d i is selected to have a value range of (90°, 180°). In other words, the angles formed by the head section 11 and the adjacent intermediate section 13, the angles formed by the tail section 12 and the adjacent intermediate section 13, and the angles formed by two adjacent intermediate sections 13 are all selected to be in the range of (90°, 180°).

[0087] ∠d i is selected to have a value range of (90°, 180°), which can make the contour of the volute 1 more bow-shaped and lead to a uniform air outlet.

[0088] Referring to FIG. 3, in some embodiments, 40° ≦ ∠θ ≦ 60°, where ∠θ is the angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute 1 along the radial direction of the cross-flow fan, and D is the tail end point on the cross-section of the volute 1 along the radial direction of the cross-flow fan.

[0089] The head end point C of the volute 1 is the starting point of the head section 11 at the air inlet 8, and the tail end point D of the volute 1 is the ending point of the tail section 12 at the air outlet 7.

[0090] ∠θ is related to the range angle of the air inlet 8. Theoretically, the larger the value of ∠θ, the better. However, due to the limitation of the right-angled installation edge in the housing, the included angle at this position cannot be infinitely enlarged and has a specific upper limit value. However, if ∠θ is too small, the range angle of the air inlet 8 will decrease, which will affect the performance of the overall machine. Therefore, 40° ≤ ∠θ ≤ 60°, which can not only reasonably utilize the installation space, but also avoid a significant reduction in the air volume without affecting the air volume of the cross-flow fan, and can improve the performance of the overall machine. In a normal environment, if ∠θ < 40°, it may allow a significant reduction in the air volume so that the expected effect cannot be achieved.

[0091] In some embodiments, 20° ≤ ∠ε ≤ 40°, and ∠ε is the angle formed by the connection line EF and the horizontal line L2. E is the head end point on the cross-section of the volute tongue 2 along the radial direction of the cross-flow fan, and F is the tail end point on the cross-section of the volute tongue 2 along the radial direction of the cross-flow fan.

[0092] The head end point E of the volute tongue 2 is the starting point of the first part 21 at the air inlet 8, and the tail end point F of the volute tongue 2 is the ending point of the second part 22 at the air outlet 7.

[0093] ∠ε is related to the range angle of the air inlet 8. Theoretically, the larger the value of ∠ε, the better. However, due to the limitation of the right-angled installation edge in the housing, the included angle cannot be infinitely enlarged and has a specific upper limit value. However, if ∠ε is too small, the range angle of the air inlet 8 will be reduced, which will affect the overall performance of the machine. Therefore, 20° ≤ ∠ε ≤ 40°, which can not only rationally utilize the installation space, but also avoid a significant reduction in the air volume without affecting the air volume of the cross-flow fan, and can improve the overall performance of the machine. In a normal environment, if ∠ε < 20°, the air volume will be significantly reduced so that the expected effect cannot be achieved.

[0094] Referring to FIG. 1, in some embodiments, the cross-flow fan further includes at least two air deflectors 4 spaced apart from the air outlet 7 along the axial direction of the cross-flow fan, and all the air deflectors 4 are respectively connected to the second portion 22. Alternatively, all the air deflectors 4 are respectively in contact with the volute 1.

[0095] At least two air deflectors 4 are spaced apart from the air outlet 7 along the axial direction of the cross-flow fan, which can deflect the air flow flowing out of the air outlet 7 and provide a uniform cooling effect and cooling temperature.

[0096] Referring to FIG. 1, in some embodiments, the cross-flow fan further includes a first side plate 5 and a second side plate 6 formed of sheet metal members. The first side plate 5 is connected to the first side of the volute 1 and the volute tongue 2, and the second side plate 6 is connected to the second side of the volute 1 and the volute tongue 2, and the second side is opposite to the first side.

[0097] The contour of the front side 51 of the first side plate 5 coincides with the contour of the volute tongue 2. That is, the contour of the front side 51 of the first side plate 5 is also similar to the contour of the radial cross-section of the volute tongue 2, and the contour of the front side 51 of the first side plate 5 also includes a first part and a second part. The contour of the rear side 52 of the first side plate 5 coincides with the contour of the volute 1. That is, the contour of the rear side 52 of the first side plate 5 is also similar to the contour of the radial cross-section of the volute 1, and the contour of the rear side 52 of the first side plate 5 also includes a head section, a tail section, and at least two intermediate sections positioned between the head section and the tail section. Here, the rear side 52 of the first side plate 5 surrounds the front side 51. After the installation of the cross-flow fan is completed, the rear side 52 of the first side plate 5 is close to the rear plate of the housing.

[0098] The first side plate 5 and the second side plate 6 having the same structure are symmetrically arranged. The first side plate 5 and the second side plate 6 support the impeller 3 and have the function of preventing cold air leakage.

[0099] Referring to FIG. 4, in some embodiments, the impeller 3 includes a head end segment 31, a tail end segment 33, and at least one intermediate segment 32 continuously arranged between the head end segment 31 and the tail end segment 33.

[0100] The number of the intermediate segments 32 can be set to be one, two, or three or more as required. The air supply volume of the cross-flow fan can be adjusted by increasing or decreasing the number of the intermediate segments 32.

[0101] The head end segment 31, at least one intermediate segment 32, and the tail end segment 33 are sequentially and continuously connected along the axial direction of the cross-flow fan.

[0102] Alternatively, there is a radial rotation assembly angle between the intermediate segments 32, and the axes of the intermediate segments 32 are on the same straight line.

[0103] In some embodiments, the cross-flow fan further includes a first shaft 34 and a second shaft 35, the length of the first shaft 34 being greater than the length of the second shaft 35, and the shaft diameter of the first shaft 34 being smaller than the shaft diameter of the second shaft 35. The first shaft 34 is disposed in the tail end segment 33, and the second shaft 35 is disposed in the head end segment 31.

[0104] In some embodiments, the cross-flow fan may include two or more impellers 3, each of which may be continuously connected.

[0105] During the actual design process, it can be adapted to the overall mechanical structure with different structural dimensions by simply continuously connecting a plurality of impellers 3 or by changing the length dimensions of the volute and the volute tongue.

[0106] In some embodiments, the second shaft 35 is provided with a through hole. In two adjacent impellers 3, the first shaft 34 of the tail end segment 33 of one impeller 3 may pass through the through hole of the second shaft 35 of the head end segment 31 of the other impeller 3. The impellers 3 are continuously used by cooperating the first shaft 34 of the tail end segment 33 with the second shaft 35 of the head end segment 31, thereby adapting to different dimensions of the overall machine.

[0107] Alternatively, considering that the stability may be affected by the extremely long dimensions of a plurality of continuously connected impellers 3, the dimensions of the plurality of continuously connected impellers 3 are 700 mm or less.

[0108] In some embodiments, the cross-flow fan further includes a locking member. When the first shaft 34 of the tail end segment 33 of one impeller 3 passes through the through hole of the second shaft 35 of the head end segment 31 of the other impeller 3, the first shaft 34 of one impeller 3 and the second shaft 35 of the other impeller 3 are locked by the locking member.

[0109] In some embodiments, the cross-flow fan further includes a bearing 9 disposed on the first side plate 5, and the first shaft 34 of the tail end segment 33 of the impeller 3 is cooperatively connected to the bearing 9, so that the impeller 3 can rotate smoothly. Alternatively, the second shaft 35 of the first end section 31 of the impeller 3 is riveted to the second side plate 5.

[0110] In some embodiments, the volute 1, the volute tongue 2, the first side plate 5, the second side plate 6, and the air flow deflector 4, all made of sheet metal, have advantages such as simple machining and suitable plasticity.

[0111] The air duct of the cross-flow fan processed by bending the sheet metal members for the volute 1 and the volute tongue 2 and processed by numerical control sheet metal for the side plates and connected by screws has the characteristics of low cost and uniform air supply.

[0112] In some embodiments, by continuously connecting a plurality of impellers 3 or by increasing or decreasing the forming dimensions of the volute tongue 2, the volute 1, and the impeller 3, it can be adapted to overall machines with different structural dimensions. Here, the forming dimensions mainly include the length dimension, and the length dimension of the impeller 3 can be determined by increasing or decreasing the number of intermediate segments 32.

[0113] In some embodiments, the connection of various members such as the volute 1, the volute tongue 2, the first side plate 5, and the second side plate 6 can be by riveting, screw connection, or bolt connection.

[0114] In some embodiments, the installation method of the cross-flow fan includes the following.

[0115] The second part 22 of the volute tongue 2 and the plurality of air flow deflectors 4 are welded and assembled into a fixed plate assembly, and the fixed plate assembly is riveted to the front side 51 of the first side plate 5. The rear side 52 of the first side plate 5 is riveted to the volute 1. Here, the rear side 52 of the first side plate 5 surrounds the front side 51. After the installation of the cross-flow fan is completed, the rear side 52 of the first side plate 5 is close to the rear plate of the housing. The bearing 9 is installed in the central hole of the first side plate 5, and the first shaft 34 of the impeller 3 is installed in the bearing 9. After the impeller 3 is installed, the other side of the volute tongue 2 and the other side of the volute 1 are riveted to the second side plate 6.

[0116] When the air duct assembly operates, the impeller 3 rotates in the counterclockwise direction, draws in cold air through the air inlet 8, and the cold air is guided to the air outlet 7 by the volute 1 having a specific bending shape, and is uniformly supplied at the air outlet 7 by the flow deflection of the plurality of air flow deflectors 4, thereby achieving the purpose of temperature adjustment.

[0117] In some embodiments, the air duct assembly includes a volute 1, a volute tongue 2, and an impeller 3. The volute tongue 2 includes a first part 21 and a second part 22. The first part 21 cooperates with the volute 1 to surround the impeller 3, and an air outlet 7 is formed between the second part 22 and the volute 1. ∠α = ∠β, where ∠α is the angle formed by the connecting line OA and the connecting line OC, and ∠β is the angle formed by the connecting line OB and the connecting line OC. O is the center point of the radial cross-section of the impeller 3, A is the point on the volute 1 closest to the center point O, B is the point on the first part 21 closest to the center point O, and C is the point on the extension line of the second part 22 closest to the center point O.

[0118] In some embodiments, ∠α = ∠β, and the angle is set to reduce the air intake resistance and smoothly blow out the air so as to enable uniform air supply and stable operation of the cross-flow fan.

[0119] In some embodiments, the connecting line OA is perpendicular to the axis of the impeller 3.

[0120] In some embodiments, point C is also a point on the impeller 3, and the extension line of the second portion 22 is a tangent line to the radial cross-section of the impeller 3 at point C.

[0121] In some embodiments, the volute 1 formed by bending a sheet metal member includes a head section 11, a tail section 12, and at least two intermediate sections 13 positioned between the head section 11 and the tail section 12.

[0122] In some embodiments, the head section 11 is positioned at the location of the air inlet 8 of the air duct assembly at the upper part of the volute 1, and the tail section 12 is positioned at the location of the air outlet 7 of the air duct assembly at the laterally lower part of the volute 1. The angle formed by the tangent line passing through the apex of the head section 11 and the tangent line passing through the outermost point of the tail section 12 is ∠γ, and ∠γ = 90° ± 5°.

[0123] In some embodiments,

Number

[0124] In some embodiments, the value range of ∠d i is selected to be (90°, 180°).

[0125] In some embodiments, 40° ≤ ∠θ ≤ 60°, where ∠θ is the included angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute 1 along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute 1 along the radial direction of the air duct assembly.

[0126] In some embodiments, 20° ≤ ∠ε ≤ 40°, where ∠ε is the included angle formed by the connecting line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue 2 along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue 2 along the radial direction of the air duct assembly.

[0127] In some embodiments, the air duct assembly further includes at least two air flow deflectors 4 spaced apart from the air outlet 7, and all the air flow deflectors 4 are respectively connected to the second portion 22.

[0128] In some embodiments, the air duct assembly further includes a first side plate 5 and a second side plate 6 formed of sheet metal members. The first side plate 5 is connected to the first side of the volute 1 and the volute tongue 2, and the second side plate 6 is connected to the second side of the volute 1 and the volute tongue 2, where the second side is opposite to the first side.

[0129] In some embodiments, the impeller 3 includes a head end segment 31, a tail end segment 33, and at least one intermediate segment 32 continuously disposed between the head end segment 31 and the tail end segment 33.

[0130] In some embodiments, the volute tongue 2 is a member formed by bending a sheet metal member.

[0131] In some embodiments, the air duct assembly includes a volute 1 including a head section 11, a tail section 12, and at least two intermediate sections 13 between the head section 11 and the tail section 12. The head section 11 is positioned at the location of the air inlet 8 of the air duct assembly at the upper part of the volute 1, and the tail section 12 is positioned at the location of the air outlet 7 of the air duct assembly at the laterally lower part of the volute 1. The angle formed by the tangent line passing through the apex of the head section 11 and the tangent line passing through the outermost point of the tail section 12 is ∠γ, and ∠γ = 90° ± 5°.

[0132] In some embodiments, ∠γ = 90° ± 5°, and the angle is set to facilitate a smooth air outlet of the air duct assembly.

[0133] In some embodiments, the volute 1 is configured to form the head section 11, the tail section 12, and at least two intermediate sections 13 by bending a sheet metal member multiple times.

Number

[0134] In some embodiments, the value range of ∠d i is selected to be (90°, 180°).

[0135] In some embodiments, the air duct assembly further includes a volute tongue 2 and an impeller 3. The volute tongue 2 includes a first portion 21 and a second portion 22. The first portion 21 cooperates with the volute 1 to surround the impeller 3, and an air outlet 7 is formed between the second portion 22 and the volute 1.

[0136] In some embodiments, ∠α = ∠β, where ∠α is the angle formed by connection line OA and connection line OC, ∠β is the angle formed by connection line OB and connection line OC, O is the center point of the radial cross-section of the impeller 3, A is the point on the volute 1 closest to the center point O, B is the point on the first part 21 closest to the center point O, and C is the point on the extension line of the second part 22 closest to the center point O.

[0137] In some embodiments, the connection line OA is perpendicular to the axis of the impeller 3.

[0138] In some embodiments, point C is also a point on the impeller 3, and the extension line of the second part 22 is the tangent line to the radial cross-section of the impeller 3 at point C.

[0139] In some embodiments, 40° ≤ ∠θ ≤ 60°, where ∠θ is the angle formed by connection line CD and the horizontal line L1, C is the head end point on the cross-section of the volute 1 along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute 1 along the radial direction of the air duct assembly.

[0140] In some embodiments, 20° ≤ ∠ε ≤ 40°, where ∠ε is the angle formed by connection line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue 2 along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue 2 along the radial direction of the air duct assembly.

[0141] In some embodiments, the air duct assembly further includes at least two airflow deflectors 4 spaced apart from the air outlet 7, and all the airflow deflectors 4 are respectively connected to the second part 22.

[0142] In some embodiments, the air duct assembly further includes a first side plate 5 and a second side plate 6 formed of sheet metal members. The first side plate 5 is connected to the first side of the volute 1 and the volute tongue 2, and the second side plate 6 is connected to the second side of the volute 1 and the volute tongue 2, where the second side is opposite to the first side.

[0143] In some embodiments, the impeller 3 includes a head end segment 31, a tail end segment 33, and at least one intermediate segment 32 continuously disposed between the head end segment 31 and the tail end segment 33.

[0144] In some embodiments, the air duct assembly further includes a volute tongue 2 formed by bending a sheet metal member.

[0145] In some embodiments, a cross-flow fan is also provided. The cross-flow fan includes the air duct assembly described above.

[0146] In some embodiments, an air conditioning device is also provided. The air conditioning device includes the cross-flow fan described above.

[0147] In some embodiments, the air conditioning device includes a housing, and the cross-flow fan is disposed within the housing.

[0148] When the cross-flow fan is installed within the housing, the cross-flow fan is generally positioned within the angular area between the upper plate and the rear plate of the housing. The upper portion of the volute 1 is adjacent to the upper plate of the housing, and the side portion of the volute 1 is adjacent to the rear plate of the housing. The angle between the upper plate and the rear plate of the housing is approximately 90 degrees.

[0149] In some embodiments, the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

[0150] Based on the embodiments of the present disclosure described above, the technical features of one of the embodiments can be advantageously combined with one or more other embodiments without explicit negation or contradiction.

[0151] Finally, it should be noted that the above embodiments are not intended to limit the technical solutions of the present disclosure, but only to explain the technical solutions of the present disclosure. Although the present disclosure has been described in detail with reference to preferred embodiments, those skilled in the art can still make modifications to the embodiments of the present disclosure or make equivalent substitutions for some of the technical features. It should be understood that all such modifications and equivalent substitutions should be included within the scope of the technical solutions sought to be protected in the present disclosure without departing from the spirit of the technical solutions of the present disclosure.

Claims

1. An air duct assembly comprising a volute (1), a volute tongue (2), and an impeller (3), wherein the volute tongue (2) comprises a first part (21) and a second part (22), the first part (21) cooperates with the volute (1) to surround the impeller (3), an air outlet (7) is formed between the second part (22) and the volute (1), ∠α = ∠β, ∠α is the angle formed by the connecting line OA and the connecting line OC, ∠β is the angle formed by the connecting line OB and the connecting line OC, O is the center point of the radial cross-section of the impeller (3), A is the point on the volute (1) closest to the center point O, B is the point on the first part (21) closest to the center point O, and C is the point on the extension line of the second part (22) closest to the center point O.

2. The air duct assembly according to claim 1, wherein the connecting line OA is perpendicular to the axis of the impeller (3).

3. The air duct assembly according to claim 1 or 2, wherein C is also a point on the impeller (3), and the extension line of the second part (22) is a tangent to the radial cross-section of the impeller (3) at the point C.

4. The air duct assembly according to any one of claims 1 to 3, wherein the volute (1) comprises a head section (11), a tail section (12), and at least two intermediate sections (13) positioned between the head section (11) and the tail section (12), and the volute (1) is formed by bending a sheet metal member.

5. The head section (11) is positioned at the location of the air inlet (8) of the air duct assembly at the upper part of the volute (1), the tail section (12) is positioned at the location of the air outlet (7) of the air duct assembly at the laterally lower part of the volute (1), and the angle formed by the tangent passing through the apex of the head section (11) and the tangent passing through the outermost point of the tail section (12) is ∠γ, and ∠γ = 90° ± 5°. The air duct assembly according to claim 4.

6. 【Number 1】 where n is the number of turns of the volute, n ≧ 3, and ∠d ｉ is the angle of the i-th turn, and the value range of i is selected to be from 1 to n. The air duct assembly according to claim 5.

7. ∠d ｉ The air duct assembly according to claim 6, wherein the range of the value of ｉ is selected to be (90°, 180°).

8. 40° ≤ ∠θ ≤ 60°, where ∠θ is the angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute (1) along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute (1) along the radial direction of the air duct assembly. The air duct assembly according to any one of claims 1 to 7.

9. 20° ≤ ∠ε ≤ 40°, where ∠ε is the angle formed by the connecting line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue (2) along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue (2) along the radial direction of the air duct assembly. The air duct assembly according to any one of claims 1 to 8.

10. Further comprising at least two air flow deflectors (4), the at least two air flow deflectors (4) being spaced apart from the air outlet (7), and all the air flow deflectors (4) being respectively connected to the second part (22). The air duct assembly according to any one of claims 1 to 9.

11. Further comprising a first side plate (5) and a second side plate (6) formed of sheet metal members, the first side plate (5) being connected to the first side of the volute (1) and the volute tongue (2), and the second side plate (6) being connected to the second side of the volute (1) and the volute tongue (2), the second side being opposite to the first side. The air duct assembly according to any one of claims 1 to 10.

12. The impeller (3) comprises a head end segment (31), a tail end segment (33), and at least one intermediate segment (32) continuously arranged between the head end segment (31) and the tail end segment (33). The air duct assembly according to any one of claims 1 to 11.

13. The volute tongue (2) is a member formed by bending a sheet metal member. The air duct assembly according to any one of claims 1 to 12.

14. A cross-flow fan comprising the air duct assembly according to any one of claims 1 to 13.

15. An air conditioning device comprising the cross-flow fan according to claim 14.

16. The air conditioning device according to claim 15, wherein the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

17. An air duct assembly comprising a volute (1), wherein the volute (1) comprises a head section (11), a tail section (12), and at least two intermediate sections (13) positioned between the head section (11) and the tail section (12), the head section (11) is positioned at the position of the air inlet (8) of the air duct assembly at the upper part of the volute (1), the tail section (12) is positioned at the position of the air outlet (7) of the air duct assembly at the lateral lower part of the volute (1), and the angle formed by a tangent passing through the apex of the head section (11) and a tangent passing through the outermost point of the tail section (12) is ∠γ, and ∠γ = 90° ± 5°. The air duct assembly.

18. The volute (1) is configured to form the head section (11), the tail section (12), and the at least two intermediate sections (13) by bending a sheet metal member multiple times. 【Number 2】 where n is the number of bends, n ≥ 3, and ∠d ｉ is the angle of the i-th bend, and the value of i is selected so that the range is from 1 to n, the air duct assembly according to claim 17.

19. ∠d ｉ The air duct assembly according to claim 18, wherein the range of the value of () is selected to be (90°, 180°).

20. Further comprising a volute tongue (2) and an impeller (3), the volute tongue (2) comprises a first part (21) and a second part (22), the first part (21) cooperates with the volute (1) to surround the impeller (3), and an air outlet (7) is formed between the second part (22) and the volute (1). The air duct assembly according to any one of claims 17 to 19.

21. ∠α = ∠β, ∠α is the angle formed by the connecting line OA and the connecting line OC, ∠β is the angle formed by the connecting line OB and the connecting line OC, O is the center point of the radial cross-section of the impeller (3), A is the point on the volute (1) closest to the center point O, B is the point on the first part (21) closest to the center point O, and C is the point on the extension line of the second part (22) closest to the center point O. The air duct assembly according to claim 20. Claim 22 The air duct assembly according to claim 21, wherein the connecting line OA is perpendicular to the axis of the impeller (3). Claim 23 The air duct assembly according to claim 21 or 22, wherein C is also a point on the impeller (3), and the extension line of the second portion (22) is a tangent to the radial cross-section of the impeller (3) at the point C. Claim 24 The air duct assembly according to any one of claims 1 to 23, wherein 40° ≤ ∠θ ≤ 60°, ∠θ is the angle formed by the connecting line CD and the horizontal line L1, C is the head end point on the cross-section of the volute (1) along the radial direction of the air duct assembly, and D is the tail end point on the cross-section of the volute (1) along the radial direction of the air duct assembly. Claim 25 The air duct assembly according to any one of claims 20 to 24, wherein 20° ≤ ∠ε ≤ 40°, ∠ε is the angle formed by the connecting line EF and the horizontal line L2, E is the head end point on the cross-section of the volute tongue (2) along the radial direction of the air duct assembly, and F is the tail end point on the cross-section of the volute tongue (2) along the radial direction of the air duct assembly. Claim 26 The air duct assembly according to any one of claims 20 to 25, further comprising at least two air flow deflectors (4), the at least two air flow deflectors (4) being spaced apart from the air outlet (7), and all the air flow deflectors (4) being respectively connected to the second portion (22). Claim 27 The air duct assembly according to any one of claims 20 to 26, further comprising a first side plate (5) and a second side plate (6) formed of sheet metal members, the first side plate (5) being connected to the first side of the volute (1) and the volute tongue (2), and the second side plate (6) being connected to the second side of the volute (1) and the volute tongue (2), the second side being opposite to the first side. Claim 28 The impeller (3) comprises a head end segment (31), a tail end segment (33), and at least one intermediate segment (32) continuously arranged between the head end segment (31) and the tail end segment (33). The air duct assembly according to any one of claims 20 to 27.

29. The air duct assembly according to any one of claims 17 to 28, further comprising a volute tongue (2) formed by bending a sheet metal member.

30. A cross-flow fan comprising the air duct assembly according to any one of claims 17 to 29.

31. An air conditioning device comprising the cross-flow fan according to claim 30.

32. The air conditioning device according to claim 31, wherein the air conditioning device is an air conditioner, a fresh air system, or a refrigerator.

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