Air duct volute and air conditioner

Abstract

The air duct volute comprises a volute body and a backflow prevention structure, an air duct is arranged in the volute body, the volute body comprises a volute tongue protruding towards the air duct, a tooth groove structure is formed on the inner wall, facing the air duct, of the volute tongue, and the tooth groove structure comprises a plurality of tooth ribs arranged at intervals in the length direction of the volute body. Tooth grooves are defined between every two adjacent tooth ribs, and anti-backflow structures are arranged in at least part of the tooth grooves. According to the air duct volute disclosed by the embodiment of the utility model, on the basis that the tooth groove structure is arranged on the volute tongue to solve the problems of poor injection molding, deformation and the like of the air duct volute at the volute tongue part, the backflow prevention structures are arranged in at least part of the tooth grooves, so that the backflow prevention structures can block airflow flowing back along the tooth grooves; air flow flowing back along the tooth grooves is reduced, so that air output loss is reduced, air output is increased, and the performance of the air conditioner is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to an air duct volute and an air conditioner. Background Art

[0002] The tongue of the volute is prone to problems such as poor injection molding and deformation. A slotted structure is usually created at the tongue to address these issues. However, during operation, some airflow will flow back through the slots in the slotted structure, resulting in a certain loss of airflow. Therefore, this method needs improvement. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present invention is to provide an air duct volute, which is provided with a tooth groove structure on the volute tongue to improve the problems of poor injection molding and deformation of the air duct volute at the volute tongue. By providing an anti-backflow structure in at least part of the tooth groove, the anti-backflow structure can block the airflow backflowing along the tooth groove, reduce the amount of airflow backflowing along the tooth groove, thereby reducing the air output loss, increasing the air output, and improving the working efficiency of the whole machine.

[0004] The utility model also provides an air conditioner comprising the air duct volute.

[0005] According to the air duct volute of the embodiment of the first aspect of the present invention, the air duct volute includes a volute body and an anti-backflow structure, the volute body has an air duct and includes a volute tongue protruding toward the air duct, the volute body is an integral injection molded part, and the inner wall of the volute tongue facing the air duct is formed with a tooth groove structure, the tooth groove structure includes a plurality of tooth ribs arranged at intervals along the length direction of the volute body, and a tooth groove is defined between two adjacent tooth ribs, and the anti-backflow structure is provided in at least part of the tooth groove.

[0006] According to the air duct volute of the embodiment of the present invention, a tooth groove structure is provided on the volute tongue to improve the problems of poor injection molding and deformation of the air duct volute at the volute tongue part. By providing an anti-backflow structure in at least part of the tooth grooves, the anti-backflow structure can block the airflow backflowing along the tooth grooves, reduce the amount of airflow backflowing along the tooth grooves, thereby reducing the air output loss, increasing the air output, and improving the working efficiency of the whole machine.

[0007] According to some embodiments of the present invention, at least a portion of the backflow prevention structure is located at a position where the depth of the tooth groove is maximum.

[0008] According to some embodiments of the present invention, the anti-backflow structure has two anti-backflow side surfaces arranged opposite to each other along the extension direction of the tooth groove, the anti-backflow side surfaces are inclined relative to the bottom surface of the tooth groove, and the anti-backflow side surfaces are inclined toward the rotation direction of the wind wheel.

[0009] According to some embodiments of the present invention, the angle between the backflow prevention side surface and the tooth groove bottom surface is α, and the range is 60°≤α<90°.

[0010] According to some embodiments of the present invention, a dimension of the anti-backflow structure in the extension direction of the tooth rib is A1, an extension length of the tooth rib is A2, and A1 / A2≤1 / 2.

[0011] According to some embodiments of the present invention, 1 / 10≤A1 / A2≤1 / 6.

[0012] According to some embodiments of the present invention, the anti-backflow structure does not protrude from the tooth rib.

[0013] According to some embodiments of the present invention, the surface of the backflow prevention structure facing the wind wheel is the first surface, the surface of the tooth rib facing the wind wheel is the second surface, and the first surface is flush with the second surface.

[0014] According to some embodiments of the present invention, the anti-backflow structure located between two adjacent tooth ribs connects the two adjacent tooth ribs.

[0015] According to some embodiments of the present invention, the anti-backflow structure is formed in a block shape; and / or the depth of the tooth groove ranges from 1.5 mm to 7 mm.

[0016] According to some embodiments of the present invention, the air duct volute is an integral injection-molded part.

[0017] According to some embodiments of the present invention, the volute tongue includes a first area, which is located at at least one end of the volute body in the length direction, and the anti-backflow structure is provided between any two adjacent tooth ribs in the first area.

[0018] According to some embodiments of the present invention, the end surfaces of the air duct located at both ends of the volute body in the length direction are air duct end surfaces, and the anti-backflow structure arranged in the first area starts from the air duct end surfaces.

[0019] According to some embodiments of the present invention, the arrangement length of the backflow prevention structure in the first area is L1, and the arrangement length of the backflow prevention structure in the first area refers to the distance between the backflow prevention structures at both ends of the length direction of the first area, facing away from each other;

[0020] Among them, the value range of L1 is 20mm~70mm, or the wind wheel matched with the wind duct volute is a cross-flow wind wheel, and the wind wheel includes multiple cross-flow sections arranged along the central axis direction of the wind wheel, the central axis direction of the wind wheel is consistent with the length direction of the volute body, the length of a single cross-flow section in the central axis direction of the wind wheel is B, and the value range of L1 / B is 1~2.

[0021] According to some embodiments of the present invention, the wind wheel matched with the air duct volute is a cross-flow wind wheel, and the wind wheel includes a plurality of cross-flow sections arranged along the central axis direction of the wind wheel, and the adjacent two cross-flow sections are connected by a connecting plate, and the volute tongue includes one or a plurality of second areas arranged at intervals along the length direction of the volute body, and the second area is closer to the middle part of the length direction of the volute body relative to the first area, and the second area is opposite to the connecting plate and is arranged with the anti-backflow structure, and the anti-backflow structure is provided between any two adjacent tooth ribs in the second area.

[0022] According to some embodiments of the present invention, the arrangement length of the anti-backflow structure in the second area is L2, and the arrangement length of the anti-backflow structure in the second area refers to the distance between the anti-backflow structures at both ends of the length direction of the first area away from each other. The wind wheel matched with the air duct volute is a cross-flow wind wheel, and the middle section length of the cross-flow wind wheel is B. The value range of L2 / B is 0.5~1.

[0023] An air conditioner according to an embodiment of the second aspect of the present invention includes: a casing having an air inlet and an air outlet; a chassis installed in the casing; a heat exchanger assembly provided in the casing and installed on the chassis; a fan assembly provided in the casing and installed on the chassis, the fan assembly including a wind wheel and an air duct volute according to an embodiment of the first aspect of the present invention, at least part of the wind wheel being located in the air duct.

[0024] According to the air conditioner of the embodiment of the present invention, by including the air duct volute according to the embodiment of the first aspect of the present invention, a tooth groove structure is provided on the volute tongue to improve the problems of poor injection molding and deformation of the air duct volute at the volute tongue. The anti-backflow structure can block the airflow backflowing along the tooth groove, reduce the amount of airflow backflowing along the tooth groove, thereby reducing the air output loss, increasing the air output, and improving the working efficiency of the whole machine.

[0025] According to some embodiments of the present invention, the air duct volute is connected to the chassis and formed as one piece.

[0026] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 is a partial structural diagram of an air-conditioning indoor unit according to some embodiments of the present utility model;

[0029] Figure 2 yes Figure 1 Schematic diagram of the partial structure of the snail tongue;

[0030] Figure 3 yes Figure 1 Schematic diagram of the structure of the first region of the middle cochlear tongue;

[0031] Figure 4 yes Figure 1 Cross-sectional view of the indoor unit of the air conditioner;

[0032] Figure 5 yes Figure 4 A partial enlarged view of point A in the middle.

[0033] Reference numerals:

[0034] 100. Air conditioner indoor unit;

[0035] 101, air duct volute;

[0036] 10. Volute body; 11. Volute tongue; 12. Tooth groove structure; 13. Tooth rib; 14. Tooth groove; 15. Second surface; 16. First region; 17. Air duct end surface; 18. Second region; 19. Air duct;

[0037] 20. Anti-backflow structure; 21. Anti-backflow side; 22. First surface;

[0038] 40. Casing; 41. Heat exchanger assembly; 42. Fan assembly; 421. Wind wheel; 43. Air inlet; 44. Air outlet. DETAILED DESCRIPTION

[0039] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0040] Reference below Figure 1-Figure 5 The air duct volute 101 according to an embodiment of the present invention is described.

[0041] The air duct volute 101 according to the embodiment of the first aspect of the present invention comprises: a volute body 10 and a backflow prevention structure 20. For example, the air duct volute 101 can be used in an air conditioner.

[0042] The volute body 10 has an air duct 19 therein and includes a volute tongue 11 protruding toward the air duct 19. The volute body 10 is an integral injection molded part. By making the volute body 10 an integral injection molded part, the number of components of the air duct volute 101 can be reduced, thereby reducing the assembly process of the air duct volute 101. A tooth groove structure 12 is formed on the inner wall of the volute tongue 11 facing the air duct 19. The tooth groove structure 12 includes a plurality of tooth ribs 13 arranged at intervals along the length direction of the volute body 10 (for example, the left and right direction in the accompanying drawings), and a tooth groove 14 is defined between two adjacent tooth ribs 13. By providing the tooth groove structure 12 on the inner wall of the volute tongue 11 facing the air duct 19, problems such as poor injection molding and deformation that are prone to occur at the volute tongue 11 can be improved during injection molding of the volute body 10.

[0043] In particular, at least some of the tooth grooves 14 are provided with anti-backflow structures 20. For example, the anti-backflow structures 20 may be provided in some of the tooth grooves 14, or each tooth groove 14 may be provided with an anti-backflow structure 20. By providing the anti-backflow structures 20 in at least some of the tooth grooves 14, the anti-backflow structures 20 can block some of the airflow that flows back along the tooth grooves 14 of the tooth groove structure 12, thereby reducing the amount of airflow that flows back along the tooth grooves 14, thereby reducing the air output loss, increasing the air output, and thus improving the performance of the air conditioner.

[0044] For example, the anti-backflow structure 20 is an injection molded part, and the anti-backflow structure 20 can be integrally injection molded with the volute body 10. For example, the air duct volute 101 can be an integrally injection molded part.

[0045] According to the air duct volute 101 of the embodiment of the present invention, a tooth groove structure 12 is provided on the volute tongue 11 to improve the problems of poor injection molding and deformation of the air duct volute 101 at the volute tongue 11. By providing an anti-backflow structure 20 in at least part of the tooth grooves 14, the anti-backflow structure 20 can block the airflow backflowing along the tooth grooves 14, reduce the amount of airflow backflowing along the tooth grooves 14, thereby reducing the air output loss, increasing the air output, and improving the working efficiency of the whole machine.

[0046] According to some embodiments of the present invention, referring to Figure 3At least a portion of the backflow prevention structure 20 is located at the position where the depth of the tooth groove 14 is the greatest. Since the space is largest at the position where the depth of the tooth groove 14 is the greatest, the amount of airflow backflow is greatest at the position where the depth of the tooth groove 14 is the greatest. By locating at least a portion of the backflow prevention structure 20 at the position where the depth of the tooth groove 14 is the greatest, the backflow prevention structure 20 can effectively block this part of the backflow airflow, the backflow prevention effect is more sufficient, and the air output can be more effectively increased under the condition of a certain air intake volume, thereby improving the efficiency of the entire machine.

[0047] According to some embodiments of the present invention, referring to Figure 4 and Figure 5 The backflow prevention structure 20 has two backflow prevention side surfaces 21 arranged opposite to each other along the extension direction of the tooth groove 14. The backflow prevention side surfaces 21 are arranged obliquely relative to the bottom surface of the tooth groove 14, and the backflow prevention side surfaces 21 are inclined toward the rotation direction of the wind wheel 421. At least a portion of the wind wheel 421 is suitable for being accommodated in the air duct 19. For example, the wind wheel 421 is arranged along the first direction (for example, referring to Figure 4 When the backflow prevention side surface 21 is tilted relative to the bottom surface of the tooth slot 14 (in the direction e1 in FIG), the backflow prevention side surface 21 is tilted toward the first direction relative to the bottom surface of the tooth slot 14. By tilting the backflow prevention side surface 21 relative to the bottom surface of the tooth slot 14 and tilting the backflow prevention side surface 21 toward the rotation direction of the wind wheel 421, the angle between the windward surface of the backflow prevention structure 20 and the flow direction of the airflow can be reduced, thereby reducing the resistance of the backflow prevention structure 20 to the outflow of air and reducing noise.

[0048] According to some embodiments of the present invention, referring to Figure 5 , the angle between the anti-backflow side surface 21 and the bottom surface of the tooth groove 14 is α, and the value range of α is 60°≤α<90°. For example, the value of α can be 60°, 65°, 70°, 75°, 80°, 85°, 88°, etc. By making the angle α between the anti-backflow side surface 21 and the bottom surface of the tooth groove 14 satisfy 60°≤α<90°, the processing technology of the anti-backflow structure 20 can be simplified. For example, the anti-backflow structure 20 is integrally injection-molded on the volute body 10. By making the angle α between the anti-backflow side surface 21 and the bottom surface of the tooth groove 14 satisfy 60°≤α<90°, the mold design of the anti-backflow structure 20 can be simplified and the difficulty of the injection molding process can be reduced.

[0049] According to some embodiments of the present invention, referring to Figure 3 The dimension of the anti-backflow structure 20 in the extension direction of the tooth rib 13 is A1, the extension length of the tooth rib 13 is A2, and A1 / A2 ≤ 1 / 2. By ensuring that the dimension A1 of the anti-backflow structure 20 in the extension direction of the tooth rib 13 / the extension length A2 of the tooth rib 13 ≤ 1 / 2, the backflow prevention effect can be achieved while avoiding the problem of poor injection molding or deformation of the volute tongue 11 caused by the excessive dimension of the anti-backflow structure 20 in the extension direction of the tooth rib 13.

[0050] According to some embodiments of the present invention, referring to Figure 3 , 1 / 10≤A1 / A2≤1 / 6. For example, the value of A1 / A2 can be 1 / 10, 1 / 9, 1 / 8, 1 / 7, 1 / 6, etc. By setting the value of A1 / A2 to be not less than 1 / 10, the backflow prevention structure 20 can have sufficient structural strength, making the backflow prevention structure 20 less susceptible to damage, thereby extending the life of the backflow prevention structure 20; by setting the value of A1 / A2 to be not greater than 1 / 6, the problem of poor injection molding or deformation at the vortex tongue portion due to the anti-backflow structure 20 being too large in the extension direction of the tooth rib 13 can be avoided.

[0051] According to some embodiments of the present invention, referring to Figure 2-Figure 5 The backflow prevention structure 20 does not protrude from the tooth ribs 13. By preventing the backflow prevention structure 20 from protruding from the tooth ribs 13, the minimum distance between the volute tongue 11 and the wind wheel 421 can be prevented from being affected by the added backflow prevention structure 20. The minimum distance between the volute tongue 11 and the wind wheel 421 can be maintained at an appropriate distance, avoiding interference between the backflow prevention structure 20 and the wind wheel 421.

[0052] According to some embodiments of the present invention, referring to Figure 3 The surface of the backflow prevention structure 20 facing the wind rotor 421 is the first surface 22, and the surface of the tooth rib 13 facing the wind rotor 421 is the second surface 15. The first surface 22 and the second surface 15 are arranged flush. By arranging the first surface 22 and the second surface 15 flush, the contact area of ​​the backflow prevention structure 20 with the wind is increased, thereby maximizing the wind blocking effect. Furthermore, the addition of the backflow prevention structure 20 can prevent the minimum distance between the volute tongue 11 and the wind rotor 421 from being affected, allowing the minimum distance between the volute tongue 11 and the wind rotor 421 to remain at an appropriate distance, avoiding interference between the backflow prevention structure 20 and the wind rotor 421.

[0053] According to some embodiments of the present invention, referring to Figure 3 The backflow prevention structure 20 located between two adjacent tooth ribs 13 connects the two adjacent tooth ribs 13. By connecting the backflow prevention structure 20 between the two adjacent tooth ribs 13, there is no gap between the two tooth ribs 13 connected by the backflow prevention structure 20. This allows the airflow flowing back between the two tooth ribs 13 to be more effectively blocked by the backflow prevention structure 20. This can effectively increase the air output while maintaining a constant air intake, thereby improving overall machine efficiency. Furthermore, this can improve the overall structural strength of the volute tongue 11.

[0054] According to some embodiments of the present invention, referring to Figure 3The backflow prevention structure 20 is formed into a block shape. By forming the backflow prevention structure 20 into a block shape, the backflow prevention structure is simple, convenient for processing and forming, and the backflow prevention structure 20 has good structural strength.

[0055] According to some embodiments of the present invention, referring to Figure 5 The depth of the tooth groove 14 is h, and the value range of h is 1.5mm to 7mm. For example, the depth h of the tooth groove 14 can be 1.5mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, etc. By ensuring that the depth h of the tooth groove 14 is not less than 1.5mm, problems such as poor injection molding or deformation of the volute tongue 11 can be better improved. By ensuring that the depth h of the tooth groove 14 is not greater than 7mm, the overall size of the volute tongue 11 can be prevented from being too large and difficult to install.

[0056] According to some embodiments of the present invention, the air duct volute 101 is an integral injection molded part. This reduces the number of parts in the entire machine, facilitating installation, and further stabilizes the connection between the backflow prevention structure 20 and the volute body 10.

[0057] According to some embodiments of the present invention, referring to Figure 1 The volute tongue 11 includes a first region 16, which is located at at least one end of the volute body 10 in the longitudinal direction. A backflow prevention structure 20 is provided between any two adjacent tooth ribs 13 in the first region 16. Since the air conditioner has a shell at both ends, the parts of the air conditioner shell located on both sides of the air duct volute 101 in the longitudinal direction have a certain blocking effect on the outgoing air flow, which results in a small air flow at both ends of the air conditioner in the longitudinal direction, resulting in a small air flow at both ends of the air outlet in the longitudinal direction, resulting in uneven air flow along the longitudinal direction of the volute body 10. By providing the first region 16 at at least one end of the volute body 10 in the longitudinal direction and providing the backflow prevention structure 20 between any two adjacent tooth ribs 13 in the first region 16, the backflow prevention structure 20 in the first region 16 can prevent air flow from flowing back. When the air inlet volume is constant, the air flow of the first region 16 can be increased, thereby making the air flow along the longitudinal direction of the air outlet more uniform.

[0058] According to some embodiments of the present invention, referring to Figure 1The end surfaces of the air duct 19 located at both ends of the volute body 10 in the longitudinal direction are the air duct end surfaces 17, and the backflow prevention structure 20 arranged in the first region 16 starts from the air duct end surfaces 17. The air blown out from the air duct end surfaces 17 is strongly blocked by the outer casing at both ends of the air conditioner, so the air volume at the air duct end surfaces 17 is small. By making the backflow prevention structure 20 arranged in the first region 16 start from the air duct end surfaces 17, the backflow prevention structure 20 can effectively prevent the air flow from flowing back at the air duct end surfaces 17. Under the condition of a certain air inlet volume, the air volume out of the air duct end surfaces 17 can be increased, thereby making the air outlet more uniform along the longitudinal direction of the air outlet.

[0059] According to some embodiments of the present invention, referring to Figure 1 The arrangement length of the backflow prevention structure 20 in the first region 16 is L1. The arrangement length of the backflow prevention structure 20 in the first region 16 refers to the distance between the backflow prevention structures 20 at both ends of the length direction of the first region 16 on the sides facing away from each other. The backflow prevention structures 20 at both ends of the length direction of the first region 16 are respectively the first backflow prevention structure 20 and the second backflow prevention structure 20. The first backflow prevention structure 20 is closer to the air duct end face 17 than the second backflow prevention structure 20. The side of the first backflow prevention structure 20 close to the air duct end face 17 is not provided with the backflow prevention structure 20. In the length direction of the first region 16, the tooth rib 13 located on the side of the second backflow prevention structure 20 away from the first backflow prevention structure 20 and closest to the second backflow prevention structure 20 is the first boundary tooth rib 13. The tooth groove 14 located on the side of the first boundary tooth rib 13 away from the second backflow prevention structure 20 and closest to the second backflow prevention structure 20 is the first boundary tooth groove 14. The first boundary tooth groove 14 is not provided with the backflow prevention structure 20. The arrangement length of the backflow prevention structure 20 in the first region 16 refers to the distance between the first backflow prevention structure 20 and the second backflow prevention structure 20 on sides facing away from each other.

[0060] Among them, the value range of L1 is 20mm to 70mm. For example, the value of L1 can be 20mm, 25mm, 30mm, 35mm, 40mm, 55mm, 60mm, 70mm, etc. By making the arrangement length L1 of the anti-backflow structure 20 in the first area 16 not less than 20mm, the arrangement range of the anti-backflow structure 20 can be wider, and it can fully increase the air output in the first area 16 where the air output is relatively weak; by making the arrangement length L1 of the anti-backflow structure 20 in the first area 16 not more than 70mm, the anti-backflow structure 20 can increase the air volume in the area with relatively weak air output, thereby making the air output of the whole machine uniform, and avoiding the anti-backflow structure 20 increasing the air volume in a larger area, resulting in uneven air output of the whole machine.

[0061] According to some embodiments of the present invention, referring to Figure 1The rotor 421 that cooperates with the air duct volute 101 is a crossflow rotor 421. The rotor 421 includes multiple crossflow sections arranged along the central axis of the rotor 421. The central axis of the rotor 421 is aligned with the length of the volute body 10. The length of a single crossflow section along the central axis of the rotor 421 is B. The value of L1 / B ranges from 1 to 2. For example, the value of L1 / B can be 1, 1.2, 1.4, 1.6, 1.8, 2, etc. By setting the value of L1 / B to be no less than 1, the backflow prevention structure 20 can be deployed over a wider range, effectively increasing the airflow in the first area 16 where the airflow is relatively weak. By setting the value of L1 / B to be no greater than 2, the backflow prevention structure 20 can increase the airflow in the weaker airflow area, thereby achieving uniform airflow across the entire machine, avoiding the problem of uneven airflow caused by the backflow prevention structure 20 increasing the airflow over a larger area.

[0062] According to some embodiments of the present invention, referring to Figure 1 The wind wheel 421 that cooperates with the air duct volute 101 is a cross-flow wind wheel 421. The wind wheel 421 includes multiple cross-flow sections arranged along the central axis of the wind wheel 421. Adjacent cross-flow sections are connected by connecting plates. The volute tongue 11 includes one or multiple second areas 18 arranged at intervals along the length direction of the volute body 10. The second area 18 is closer to the middle of the length direction of the volute body 10 relative to the first area 16. The second area 18 is opposite to the connecting plate and is arranged with a backflow prevention structure 20. An anti-backflow structure 20 is provided between any two adjacent tooth ribs 13 in the second area 18. For example, the second area 18 can be one, two, three, etc. Since the wind blown out of the air outlet near the second area 18 will be blocked by the air conditioner connecting plate, the wind force near the second area 18 is weak, and the temperature regulation ability here is weak. By making the second area 18 opposite to the connecting plate and arranging an anti-backflow structure 20, and providing an anti-backflow structure 20 between any two adjacent tooth ribs 13 in the second area 18, the anti-backflow structure 20 can effectively block the backflow of airflow in the second area 18, and can more effectively increase the air output of the second area 18 when the air intake volume is constant, thereby making the air output of the whole machine more uniform; and can make the airflow of the two sections of the cross-flow impeller 421 staggered, slowing down the impact of the airflow, and reducing the noise generated by the strong interference and friction between the cross-flow impeller 421 and the airflow when the high-speed rotation is carried out.

[0063] According to some embodiments of the present invention, referring to Figure 1The arrangement length of the backflow prevention structure 20 in the second area 18 is L2. The arrangement length of the backflow prevention structure 20 in the second area 18 refers to the distance between the sides of the backflow prevention structures 20 located at both ends of the length direction of the first area 16 away from each other. The wind wheel 421 matched with the air duct volute 101 is a cross-flow wind wheel 421. The middle section length of the cross-flow wind wheel 421 is B. The value range of L2 / B is 0.5~1. The anti-backflow structures 20 located at both ends of the length direction of the second area 18 are respectively the third anti-backflow structure 20 and the fourth anti-backflow structure 20. In the length direction of the second area 18, the tooth rib 13 located on the side of the third anti-backflow structure 20 away from the fourth anti-backflow structure 20 and closest to the third anti-backflow structure 20 is the second boundary tooth rib 13, and the tooth groove 14 located on the side of the second boundary tooth rib 13 away from the third anti-backflow structure 20 and closest to the third anti-backflow structure 20 is the second boundary tooth groove 14, and the second boundary tooth groove 14 is not arranged with the anti-backflow structure 20; in the length direction of the second area 18, the tooth rib 13 located on the side of the fourth anti-backflow structure 20 away from the third anti-backflow structure 20 and closest to the fourth anti-backflow structure 20 is the third boundary tooth rib 13, and the tooth groove 14 located on the side of the third boundary tooth rib 13 away from the fourth anti-backflow structure 20 and closest to the fourth anti-backflow structure 20 is the third boundary tooth groove 14, and the third boundary tooth groove 14 is not arranged with the anti-backflow structure 20.

[0064] The arrangement length of the backflow prevention structure 20 in the second region 18 refers to the distance between the sides of the third backflow prevention structure 20 and the fourth backflow prevention structure 20 facing away from each other.

[0065] For example, the ratio of the length L2 of the backflow prevention structure 20 in the second region 18 to the length B of the middle section of the crossflow impeller 421 can be 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc. By setting the value of L2 / B to be no less than 0.5, the backflow prevention structure 20 can be arranged over a wider range, thereby fully increasing the airflow volume in the second region 18 where the airflow is relatively weak. By setting the value of L2 / B to be no greater than 1, the backflow prevention structure 20 can increase the airflow volume in the region with relatively weak airflow, thereby achieving uniform airflow across the entire unit, thereby avoiding the situation where the backflow prevention structure 20 increases the airflow volume over a larger area, resulting in uneven airflow across the entire unit.

[0066] According to the air conditioner of the second embodiment of the utility model, Figure 1 , comprising: a housing 40, a chassis, a heat exchanger assembly 41, and a fan assembly 42. The housing 40 has an air inlet 43 and an air outlet; the chassis is mounted within the housing 40; the heat exchanger assembly 41 is disposed within the housing 40 and mounted on the chassis; the fan assembly 42 is disposed within the housing 40 and mounted on the chassis. The fan assembly 42 includes a wind wheel 421 and an air duct volute 101 according to the first embodiment of the present invention. At least a portion of the wind wheel 421 is located within the air duct 19.

[0067] When the air conditioner is working, air enters the air conditioner from the air inlet 43, changes its temperature through heat exchange with the heat exchanger assembly 41, is driven by the wind wheel 421 to flow in the air duct 19, and leaves the air conditioner through the air outlet.

[0068] For example, the air conditioner is a split-type air conditioner, which includes an air-conditioning indoor unit 100 and an air-conditioning outdoor unit. For example, the air conditioner can be a split-type wall-mounted air conditioner. In this case, the air-conditioning indoor unit 100 can be a wall-mounted air-conditioning indoor unit 100. The air outlet of the air-conditioning indoor unit 100 can be located at the front lower part of the casing 40, and the air inlet 43 can be formed at the top of the casing 40.

[0069] According to the air conditioner of the embodiment of the present invention, by including the air duct volute 101 according to the embodiment of the first aspect of the present invention, a tooth groove structure 12 is provided on the volute tongue 11 to improve the problems of poor injection molding and deformation of the air duct volute 101 at the volute tongue 11, the anti-backflow structure 20 can block the airflow backflowing along the tooth groove 14, reduce the amount of airflow backflowing along the tooth groove 14, thereby reducing the air output loss, increasing the air output, and improving the working efficiency of the whole machine.

[0070] According to some embodiments of the present invention, the air duct volute 101 is connected to the chassis and is integrally formed. By connecting the air duct volute 101 to the chassis and being integrally formed, the number of components of the air conditioner can be reduced, making it easier to install.

[0071] Refer to the following Figure 1-Figure 5 The air duct volute 101 according to some embodiments of the present invention is described.

[0072] In this embodiment, the air duct volute 101 includes a volute body 10 and a backflow prevention structure 20 , and the air duct volute 101 is an integral injection-molded part.

[0073] The volute body 10 has an air duct 19 and includes a volute tongue 11 protruding toward the duct. The volute body 10 is a one-piece injection molded part. The inner wall of the volute tongue 11, facing the air duct 19, is formed with a tooth groove structure 12. This structure comprises a plurality of tooth ribs 13 spaced along the length of the volute body 10, with tooth grooves 14 defined between adjacent tooth ribs 13. At least some of the tooth grooves 14 are provided with backflow prevention structures 20. The depth of the tooth grooves 14 is h, and the value of h ranges from 1.5 mm to 7 mm.

[0074] At least a portion of the backflow prevention structure 20 is located at the maximum depth of the tooth groove 14. The backflow prevention structure 20 has two opposing backflow prevention side surfaces 21 arranged along the extension direction of the tooth groove 14. The backflow prevention side surfaces 21 are inclined relative to the bottom surface of the tooth groove 14 and are tilted toward the direction of rotation of the wind wheel 421. At least a portion of the wind wheel 421 is adapted to be accommodated within the air duct 19. The angle between the backflow prevention side surfaces 21 and the bottom surface of the tooth groove 14 is α, with a value of α ranging from 60° ≤ α to 90°. The backflow prevention structure 20 has a dimension A1 along the extension direction of the tooth rib 13, and an extension length A2, with 1 / 10 ≤ A1 / A2 ≤ 1 / 6. The backflow prevention structure 20 does not protrude from the tooth rib 13. The surface of the backflow prevention structure 20 facing the wind wheel 421 is the first surface 22, and the surface of the tooth rib 13 facing the wind wheel 421 is the second surface 15. The first surface 22 and the second surface 15 are flush. The backflow prevention structure 20 located between two adjacent tooth ribs 13 connects the two adjacent tooth ribs 13. The backflow prevention structure 20 is formed in a block shape.

[0075] The volute tongue 11 includes a first region 16, located at at least one end of the volute body 10 in the longitudinal direction. A backflow prevention structure 20 is provided between any two adjacent ribs 13 in the first region 16. The end surfaces of the air duct 19 located at both ends of the volute body 10 in the longitudinal direction are duct end surfaces 17, and the backflow prevention structure 20 arranged in the first region 16 originates from the duct end surfaces 17. The backflow prevention structure 20 is arranged over a length L1 in the first region 16, which is the distance between the backflow prevention structures 20 at both ends of the first region 16 in the longitudinal direction, facing away from each other. The backflow prevention structures 20 located at both ends of the first region 16 in the longitudinal direction are respectively a first backflow prevention structure 20 and a second backflow prevention structure 20. The first backflow prevention structure 20 is closer to the air duct end face 17 than the second backflow prevention structure 20. No backflow prevention structure 20 is arranged on the side of the first backflow prevention structure 20 close to the air duct end face 17. In the longitudinal direction of the first region 16, the tooth rib 13 located on the side of the second backflow prevention structure 20 away from the first backflow prevention structure 20 and closest to the second backflow prevention structure 20 is a first boundary tooth rib 13. The tooth groove 14 located on the side of the first boundary tooth rib 13 away from the second backflow prevention structure 20 and closest to the second backflow prevention structure 20 is a first boundary tooth groove 14. No backflow prevention structure 20 is arranged on the first boundary tooth groove 14. The arrangement length of the backflow prevention structure 20 in the first region 16 refers to the distance between the first and second backflow prevention structures 20 and their sides facing away from each other, wherein the value range of L1 is 20 mm to 70 mm. The wind wheel 421 that cooperates with the air duct volute 101 is a cross-flow wind wheel 421. The wind wheel 421 includes multiple cross-flow sections arranged along the central axis direction of the wind wheel 421. The central axis direction of the wind wheel 421 is consistent with the length direction of the volute body 10. The length of a single cross-flow section in the central axis direction of the wind wheel 421 is B, and the value range of L1 / B is 1 to 2.

[0076] The wind wheel 421 that cooperates with the air duct volute 101 is a cross-flow wind wheel 421. The wind wheel 421 includes multiple cross-flow sections arranged along the central axis direction of the wind wheel 421. The adjacent cross-flow sections are connected by a connecting plate. The volute tongue 11 includes one or multiple second areas 18 arranged at intervals along the length direction of the volute body 10. The second area 18 is closer to the middle part of the length direction of the volute body 10 relative to the first area 16. The second area 18 is opposite to the connecting plate and is arranged with a backflow prevention structure 20. An anti-backflow structure 20 is provided between any two adjacent tooth ribs 13 in the second area 18. The arrangement length of the backflow prevention structure 20 in the second area 18 is L2. The arrangement length of the backflow prevention structure 20 in the second area 18 refers to the distance between the anti-backflow structures 20 at both ends of the length direction of the first area 16 and away from each other. The wind wheel 421 matched with the air duct volute 101 is a cross-flow wind wheel 421, and the middle section length of the cross-flow wind wheel 421 is B. The value range of L2 / B is 0.5~1. The anti-backflow structures 20 located at both ends of the length direction of the second area 18 are respectively the third anti-backflow structure 20 and the fourth anti-backflow structure 20. In the length direction of the second area 18, the tooth rib 13 located on the side of the third anti-backflow structure 20 away from the fourth anti-backflow structure 20 and closest to the third anti-backflow structure 20 is the second boundary tooth rib 13, and the tooth groove 14 located on the side of the second boundary tooth rib 13 away from the third anti-backflow structure 20 and closest to the third anti-backflow structure 20 is the second boundary tooth groove 14, and the second boundary tooth groove 14 is not arranged with the anti-backflow structure 20; in the length direction of the second area 18, the tooth rib 13 located on the side of the fourth anti-backflow structure 20 away from the third anti-backflow structure 20 and closest to the fourth anti-backflow structure 20 is the third boundary tooth rib 13, and the tooth groove 14 located on the side of the third boundary tooth rib 13 away from the fourth anti-backflow structure 20 and closest to the fourth anti-backflow structure 20 is the third boundary tooth groove 14, and the third boundary tooth groove 14 is not arranged with the anti-backflow structure 20. The arrangement length of the backflow prevention structure 20 in the second region 18 refers to the distance between the sides of the third backflow prevention structure 20 and the fourth backflow prevention structure 20 facing away from each other.

[0077] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0078] In the description of the present invention, "first feature" and "second feature" may include one or more such features.

[0079] In the description of the present invention, “plurality” means two or more.

[0080] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact via another feature therebetween.

[0081] In the description of the present invention, a first feature “above”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0082] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0083] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air duct volute, characterized in that: The air duct volute includes a volute body and an anti-backflow structure. The volute body has an air duct and includes a volute tongue protruding toward the air duct. The volute body is an integral injection molded part. The inner wall of the volute tongue facing the air duct is formed with a tooth groove structure. The tooth groove structure includes a plurality of tooth ribs arranged at intervals along the length direction of the volute body. A tooth groove is defined between two adjacent tooth ribs, and the anti-backflow structure is provided in at least part of the tooth groove.

2. The air duct volute according to claim 1, characterized in that: At least a portion of the backflow prevention structure is located at a position where the depth of the tooth groove is maximum.

3. The air duct volute according to claim 1, characterized in that: The backflow prevention structure has two backflow prevention side surfaces arranged opposite to each other along the extension direction of the tooth groove. The backflow prevention side surfaces are inclined relative to the bottom surface of the tooth groove and are inclined toward the rotation direction of the wind wheel.

4. The air duct volute according to claim 3, characterized in that: The included angle between the backflow prevention side surface and the tooth groove bottom surface is α, and the range is 60°≤α<90°.

5. The air duct volute according to claim 1, characterized in that: The dimension of the backflow prevention structure in the extension direction of the tooth rib is A1, the extension length of the tooth rib is A2, and A1 / A2≤1 / 2.

6. The air duct volute according to claim 5, characterized in that: 1 / 10≤A1 / A2≤1 / 6.

7. The air duct volute according to claim 1, characterized in that: The backflow prevention structure does not protrude from the tooth ribs.

8. The air duct volute according to claim 7, characterized in that: The surface of the backflow prevention structure facing the wind wheel is the first surface, the surface of the tooth rib facing the wind wheel is the second surface, and the first surface is flush with the second surface.

9. The air duct volute according to claim 1, characterized in that: The backflow prevention structure located between two adjacent tooth ribs connects the two adjacent tooth ribs.

10. The air duct volute according to claim 1, characterized in that: The anti-backflow structure is formed in a block shape; and / or the depth of the tooth groove ranges from 1.5 mm to 7 mm.

11. The air duct volute according to claim 1, characterized in that: The air duct volute is an integral injection molded part.

12. The air duct volute according to any one of claims 1 to 11, characterized in that: The volute tongue includes a first area, which is located at at least one end of the volute body in the length direction. The anti-backflow structure is provided between any two adjacent tooth ribs in the first area.

13. The air duct volute according to claim 12, characterized in that: The end surfaces of the air duct located at both ends of the volute body in the length direction are air duct end surfaces, and the backflow prevention structure arranged in the first area starts from the air duct end surfaces.

14. The air duct volute according to claim 12, characterized in that: The arrangement length of the backflow prevention structure in the first area is L1, and the arrangement length of the backflow prevention structure in the first area refers to the distance between the two sides of the backflow prevention structures at both ends of the length direction of the first area away from each other; Among them, the value range of L1 is 20mm~70mm, or the wind wheel matched with the wind duct volute is a cross-flow wind wheel, and the wind wheel includes multiple cross-flow sections arranged along the central axis direction of the wind wheel, the central axis direction of the wind wheel is consistent with the length direction of the volute body, the length of a single cross-flow section in the central axis direction of the wind wheel is B, and the value range of L1 / B is 1~2.

15. The air duct volute according to claim 12, characterized in that: The wind wheel matched with the wind duct volute is a cross-flow wind wheel, and the wind wheel includes multiple cross-flow sections arranged along the central axis direction of the wind wheel, and the adjacent two cross-flow sections are connected by a connecting plate. The volute tongue includes one or multiple second areas arranged at intervals along the length direction of the volute body, and the second area is closer to the middle part of the length direction of the volute body relative to the first area. The second area is opposite to the connecting plate and is arranged with the anti-backflow structure, and the anti-backflow structure is provided between any two adjacent tooth ribs in the second area.

16. The air duct volute according to claim 15, characterized in that: The arrangement length of the backflow prevention structure in the second area is L2. The arrangement length of the backflow prevention structure in the second area refers to the distance between the sides of the backflow prevention structures at both ends of the length direction of the first area facing away from each other. The wind wheel matched with the duct volute is a cross-flow wind wheel. The middle section length of the cross-flow wind wheel is B, and the value range of L2 / B is 0.5~1.

17. An air conditioner, characterized in that: include: a housing having an air inlet and an air outlet; a chassis, mounted in the casing; a heat exchanger assembly, disposed in the housing and mounted on the chassis; A fan assembly is arranged in the casing and installed on the chassis, the fan assembly includes a wind wheel and an air duct volute according to any one of claims 1 to 16, and at least a portion of the wind wheel is located in the air duct.

18. The air conditioner according to claim 17, wherein: The air duct volute is connected to the chassis and is integrally formed.

Images