Cross-flow fan and air supply equipment

Abstract

The invention relates to a cross-flow fan and air supply equipment. The cross-flow fan comprises a shell, a cross-flow wind wheel and a volute tongue. The inner wall of the shell is provided with a groove structure; the cross-flow wind wheel is located in the shell, a gap is formed between the end of the cross-flow wind wheel and the groove bottom of the groove structure, and the cross-flow wind wheel is rotationally connected with the groove structure; the volute tongue is located in the shell and connected with the inner wall of the shell. The maximum distance from the first flow guide face of the volute tongue to the axis of the cross-flow wind wheel is smaller than the minimum distance from the first groove eave of the groove structure to the axis, and / or the maximum distance from the second flow guide face of the volute to the axis is smaller than the minimum distance from the second groove eave of the groove structure to the axis. The first groove eave is a groove eave attached to the volute tongue in the groove structure, and the second groove eave is a groove eave corresponding to the volute in the groove structure. By the adoption of the cross-flow fan, noise generated when the cross-flow fan is used can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical appliances, and particularly to a cross-flow fan and a air supply device. Background Art

[0002] The cross-flow fan includes a housing, a cross-flow impeller, a volute and a volute tongue. The housing has an air inlet and an air outlet. The volute and the volute tongue are both located inside the housing. The housing, the volute and the volute tongue surround and form a gas flow channel connecting the air inlet and the air outlet. The cross-flow impeller is located inside the gas flow channel and is rotatably connected to two opposite inner walls in the housing.

[0003] In the gas flow channel, the region between the volute tongue guide surface and the impeller is a low-pressure region.

[0004] There is a gap between the end of the cross-flow impeller and the inner wall of the housing. A small amount of gas flows through this gap. After the gas in the gap flows into the low-pressure region in series, it is likely to cause the flow field in the low-pressure region to be chaotic, resulting in a relatively large noise. Summary of the Invention

[0005] Embodiments of the present disclosure provide a cross-flow fan and an air supply device, which can solve the technical problems existing in the related art. The technical solutions are as follows:

[0006] In a first aspect, embodiments of the present disclosure provide a cross-flow fan, which includes a housing, a cross-flow impeller and a volute tongue;

[0007] The inner wall of the housing has a groove structure;

[0008] The cross-flow impeller is located inside the housing. There is a gap between the end of the cross-flow impeller and the bottom of the groove structure, and it is rotatably connected to the groove structure;

[0009] The volute tongue is located inside the housing and is connected to the inner wall of the housing. The maximum distance from the first guide surface of the volute tongue to the axis of the cross-flow impeller is less than the minimum distance from the first groove edge of the groove structure to the axis and / or the maximum distance from the second guide surface of the volute to the axis is less than the minimum distance from the second groove edge of the groove structure to the axis. The first groove edge is the groove edge of the groove structure that is in contact with the volute tongue, and the second groove edge is the groove edge of the groove structure corresponding to the volute.

[0010] In a possible implementation, the groove structure is a circular groove.

[0011] In a possible implementation, the circular groove is coaxially arranged with the cross-flow impeller.

[0012] In a possible implementation, the groove wall of the groove structure is perpendicular to the end face of the volute tongue.

[0013] In a possible implementation, the angle between the groove wall of the groove structure and the end face of the volute tongue is an acute angle.

[0014] In a possible implementation, the depth of the groove structure is greater than the clearance.

[0015] In a possible implementation, the first guiding surface has a plurality of convex structures, and the plurality of convex structures are arranged along the axis.

[0016] In a possible implementation, both ends of each convex structure are respectively connected to a first intersection line and a second intersection line. The first intersection line is the intersection line of the first guiding surface and the first windward surface of the volute tongue, and the second intersection line is the intersection line of the first guiding surface and the first leeward surface of the volute tongue.

[0017] In a possible implementation, the first guiding surface has a plurality of convex structures, and the plurality of convex structures are arranged in sequence along the axis of the cross-flow impeller.

[0018] In a second aspect, an embodiment of the present disclosure provides a air supply device, and the air supply device includes the cross-flow fan in the first aspect and its possible implementations.

[0019] The technical solutions provided by the embodiments of the present disclosure at least include the following beneficial effects:

[0020] An embodiment of the present disclosure provides a cross-flow fan. In this cross-flow fan, the inner wall of the housing has a groove structure. The cross-flow impeller is located inside the housing. There is a clearance between the end of the cross-flow impeller and the groove bottom of the groove structure, and it is rotationally connected to the groove structure. The volute tongue is located inside the housing and is connected to the inner wall of the housing. The maximum distance from the first guiding surface of the volute tongue to the axis of the cross-flow impeller is less than the minimum distance from the first groove edge of the groove structure to the axis and / or the maximum distance from the second guiding surface of the volute casing to the axis is less than the minimum distance from the second groove edge of the groove structure to the axis. In this way, the distance from the points on the first guiding surface to the axis is less than the distance from the points on the first groove edge to the axis. The end face of the volute tongue is closer to the axis relative to the groove wall of the groove structure. For the gas flowing out of the clearance, the end face of the volute tongue is equivalent to a step structure. Similarly, the end face of the volute casing is also equivalent to a step structure. The step structure has an obstructive effect on the gas, which can reduce the gas flow rate flowing from the clearance to the low-pressure area, thereby reducing noise.

[0021] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0024] Figure 2 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0025] Figure 3 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0026] Figure 4 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0027] Figure 5 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0028] Figure 6 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0029] Figure 7 It is a schematic structural diagram of a cross-flow fan shown in the embodiments of the present disclosure;

[0030] Figure 8 It is a schematic structural diagram of a cross-flow impeller shown in the embodiments of the present disclosure.

[0031] Legend Explanation

[0032] 1. Housing; 100. Gap;

[0033] 1a. Groove structure; 1b. Bottom of the groove structure; 1c. Wall of the groove structure; 1d. Click installation groove; 1m. First groove eaves; 1n. Second groove eaves;

[0034] 11. Air inlet; 12. Air outlet; 13. First plate body; 14. Second plate body;

[0035] 2. Cross-flow impeller;

[0036] 21. Shaft body; 22. Impeller body; 23. Impeller monomer;

[0037] 221. Wall plate; 222. Blade plate; 231. Partition plate; 232. Blade plate monomer;

[0038] 2a. Axis of the cross-flow impeller; 2b. Mounting hole for the motor output shaft;

[0039] 3. Volute tongue;

[0040] 3a. End face of the volute tongue; 3m. First intersection line; 3n. Second intersection line;

[0041] 31. First guiding surface; 32. First windward surface; 33. First leeward surface; 311. Protrusion structure;

[0042] 4. Volute casing;

[0043] 4a. End face of the volute casing;

[0044] 41. Second guiding surface;

[0045] 5. Heat exchange component;

[0046] 51. Heat exchange tube; 52. Cladding; 53. Fixing member;

[0047] 6. Motor. Detailed implementation manners

[0048] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0049] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second", "third", and similar terms used in the patent specification and claims of the present disclosure do not denote any order, quantity, or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one. The terms "comprising" or "including" and similar terms mean that the elements or items appearing before "comprising" or "including" cover the elements or items listed after "comprising" or "including" and their equivalents, and do not exclude other elements or items. The terms "connected" or "coupled" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationships may also change accordingly.

[0050] Nowadays, cross-flow fans are widely used in air conditioners due to their advantages such as compact structure.

[0051] In the related art, a cross-flow fan includes a housing, a cross-flow impeller, a volute and a volute tongue. The housing is provided with an air inlet and an air outlet, and the cross-flow impeller, the volute and the volute tongue are all arranged inside the housing. When the impeller rotates, the area between the guiding surface of the volute tongue and the impeller is a low-pressure area. There is a gap between the end of the cross-flow impeller and the inner wall of the housing, and a small amount of gas flows through this gap. Since the gas velocity in the low-pressure area is relatively fast, the gas in the gap is very likely to cause the gas flow field in the low-pressure area to be chaotic after flowing into the low-pressure area, resulting in relatively high noise. Therefore, there is an urgent need for a cross-flow fan that can prevent gas from flowing into the low-pressure area from the gap to solve the above problems.

[0052] An embodiment of the present disclosure provides a cross-flow fan. As Figure 1 shown, the cross-flow fan includes a housing 1, a cross-flow impeller 2 and a volute tongue 3.

[0053] Referring to Figure 2 , the inner wall of the housing 1 has a groove structure 1a. The cross-flow impeller 2 is located inside the housing 1. There is a gap 100 between the end of the cross-flow impeller 2 and the bottom 1b of the groove structure 1a, and it is rotationally connected to the groove structure 1a. The volute tongue 3 is located inside the housing 1 and is connected to the inner wall of the housing 1. Referring to Figure 1 , the maximum distance from the first guiding surface 31 of the volute tongue 3 to the axis 2a of the cross-flow impeller 2 is less than the minimum distance from the first groove edge 1m of the groove structure 1a to the axis 2a and / or the maximum distance from the second guiding surface 41 of the volute 4 to the axis 2a is less than the minimum distance from the second groove edge 1n of the groove structure 1a to the axis 2a.

[0054] As Figure 2 shown, the inner wall of the housing 1 has a groove structure 1a. The transition position between the groove structure 1a and the inner wall of the housing 1 is the groove edge of the groove structure 1a. The volute tongue 3 includes an end face 3a and a first guiding surface 31. The end face 3a and the first guiding surface 31 of the volute tongue 3 are adjacent wall surfaces of the volute tongue 3. The end face 3a of the volute tongue 3 is in contact with the inner wall of the housing 1, and the first guiding surface 31 is perpendicular to the inner wall of the housing 1. The volute 4 includes an end face 4a and a second guiding surface 41. The end face 4a and the second guiding surface 41 of the volute 4 are adjacent wall surfaces of the volute 4. The end face 4a of the volute 4 is arranged opposite to the inner wall of the housing 1, and the second guiding surface 41 is perpendicular to the inner wall of the housing 1.

[0055] Referring to Figure 1 and Figure 2, a part of the groove edge of the groove structure 1a is in contact with the end face 3a of the volute tongue 3, and this part of the groove edge is the first groove edge 1m, that is, the first groove edge 1m is the groove edge in the groove structure 1a that is in contact with the volute tongue 3. In the direction of the axis 2a of the cross-flow impeller 2, a part of the groove edge of the groove structure 1a is arranged opposite to the end face 4a of the volute 4, and this part of the groove edge is the second groove edge 1n, that is, the second groove edge 1n is the groove edge in the groove structure 1a that corresponds to the volute 4, and the end of the cross-flow impeller 2 can be rotatably connected to the groove bottom 1b of the groove structure 1a.

[0056] The shape of the cross-section of the groove structure 1a in the direction perpendicular to its groove depth can be circular, that is, the groove structure 1a is a circular groove. In addition, the groove structure can also be an oval groove, or a rectangular groove, as well as various reasonable polygonal grooves. The embodiments of the present disclosure do not limit the groove shape.

[0057] The distance from the points on the first guide surface 31 to the axis 2a is less than the distance from the points on the first groove edge 1m to the axis 2a. In this way, the end face 3a of the volute tongue 3 is closer to the axis 2a relative to the groove wall 1c of the groove structure 1a. For the gas flowing out of the gap 100, the end face 3a of the volute tongue 3 is equivalent to a step structure, and this step structure has an obstructive effect on the gas, which can reduce the gas flow rate flowing from the gap 100 to the low-pressure area, thereby reducing noise.

[0058] Or, the distance from the points on the second guide surface 41 to the axis 2a is less than the distance from the points on the second groove edge 1n to the axis 2a. The end face 4a of the volute 4 is closer to the axis 2a relative to the groove wall 1c of the groove structure 1a. For the gas flowing out of the gap 100, the end face 4a of the volute 4 is equivalent to a step structure, and this step structure has an obstructive effect on the gas, which can reduce the gas flow rate flowing from the gap 100 to the low-pressure area, thereby reducing noise.

[0059] Or, the distance from the points on the first guide surface 31 to the axis 2a is less than the distance from the points on the first groove edge 1m to the axis 2a, and the distance from the points on the second guide surface 41 to the axis 2a is less than the distance from the points on the second groove edge 1n to the axis 2a. In this way, the end face 3a of the volute tongue 3 is equivalent to a step structure, and the end face 4a of the volute 4 is also equivalent to a step structure. These step structures have an obstructive effect on the gas, which can reduce the gas flow rate flowing from the gap 100 to the low-pressure area, thereby reducing noise.

[0060] Figure 7 is an overall schematic diagram of a cross-flow fan provided by the embodiments of the present disclosure. As Figure 7 shown, the housing 1 has a cubic structure, and there is an accommodation space in the cubic structure for accommodating the cross-flow impeller 2, the volute tongue 3, and the volute 4.

[0061] Refer toFigure 1 and Figure 7 The housing 1 has an air inlet 11 and an air outlet 12 that communicate with each other. The volute tongue 3 and the volute casing 4 are located inside the housing 1 and are connected to the housing 1. The shapes of the air inlet 11 and the air outlet 12 may be the same or different. For example, the shapes of the air inlet 11 and the air outlet 12 may both be rectangular. The embodiments of the present disclosure do not limit the shapes of the air inlet 11 and the air outlet 12.

[0062] The housing 1 has a first plate body 13 and a second plate body 14 arranged opposite to each other. The wall surface of the first plate body 13 close to the second plate body 14 and the wall surface of the second plate body 14 close to the first plate body 13 respectively have groove structures 1a. That is, the groove structures 1a are respectively provided on two opposite inner walls of the housing 1. In the housing 1, the shapes and sizes of the groove structure 1a provided on the first plate body 13 and the groove structure 1a provided on the second plate body 14 may be the same or different. Those skilled in the art can set them according to actual needs. The embodiments of the present disclosure do not limit this. Hereinafter, taking the shapes and sizes of these two groove structures 1a as the same as an example, the groove structure 1a on the first plate body 13 will be introduced in detail.

[0063] In implementation, the processing of the groove structure 1a can be completed on the inner walls of the first plate body 13 and the second plate body 14 respectively. The groove structure 1a can be processed by a cutting process, a casting process, or a stamping process. The embodiments of the present disclosure do not limit the processing method of the groove structure 1a. After the processing of the groove structure 1a is completed, a through hole can be processed along the center line of the groove structure 1a. This through hole is used for the rotational connection with the cross-flow impeller 2, and the axis of this through hole is the axis 2a of the cross-flow impeller 2. Subsequently, the volute tongue 3 can be adjusted to a specified position such that the maximum distance from the first guiding surface 31 of the volute tongue 3 to the axis 2a is less than the minimum distance from the first groove edge 1m of the groove structure 1a to the axis 2a. Then, the two end faces 3a of the volute tongue 3 are respectively connected to the inner walls of the first plate body 13 and the second plate body 14 to complete the assembly of the cross-flow fan.

[0064] The connection method between the end face 3a of the volute tongue 3 and the inner wall of the housing 1 can be welding or connection by bolts. The embodiments of the present disclosure do not limit the connection method between the volute tongue 3 and the housing 1.

[0065] In some possible embodiments, as Figure 1 shown, the groove structure 1a is a circular groove. That is, the cross-sectional shape of the groove structure 1a in the direction perpendicular to its groove depth is circular.

[0066] In implementation, the specific shape of the groove structure 1a can match the shape of the end wall of the cross-flow impeller 2. When the end wall of the cross-flow impeller 2 is cylindrical, the groove structure 1a can be a cylindrical groove. When the end wall of the cross-flow impeller 2 is hemispherical, the groove structure 1a can be a hemispherical groove. The embodiments of the present disclosure do not limit this.

[0067] In this way, the processing difficulty of the groove structure 1a can be reduced, and at the same time, the adaptability between the groove structure 1a and the end wall of the cross-flow impeller 2 can be improved.

[0068] In addition, when the groove structure 1a is a circular groove, any position on the groove wall 1c of the groove structure 1a has a smooth transition. When the gas enters the gap 100, it is easy to flow cyclically along the groove wall 1c of the groove structure 1a and is not easy to flow out of the gap 100. Therefore, the gas remaining in the gap 100 is not easy to affect the gas in other areas, and thus the overall gas flow in the cross-flow fan can be kept stable and the noise can be reduced.

[0069] Optionally, when the groove structure 1a is a circular groove, the circular groove can be coaxially arranged with the cross-flow impeller 2.

[0070] In implementation, the processing process of the housing 1 can be to first process the circular groove and then process a through hole along the axis of the circular groove. The processing process of the cross-flow impeller 2 can be to first process an impeller body (not shown), and then process a shaft body (not shown) on the axis of the impeller body. The shaft body matches the size of the above through hole. Furthermore, after the assembly is completed, the circular groove can be coaxially arranged with the cross-flow impeller 2.

[0071] In this way, the adaptability between the groove structure 1a and the end wall of the cross-flow impeller 2 can be further improved.

[0072] In some possible embodiments, the end face 3a of the volute tongue 3 is perpendicular to the groove wall 1c of the groove structure 1a.

[0073] In one example, as Figure 2 shown, the end face 3a of the volute tongue 3 can be a plane, which is perpendicular to the axis 2a of the cross-flow impeller 2 and fits the notch of the groove structure 1a. The groove wall 1c of the groove structure 1a can be perpendicular to the axis 2a of the cross-flow impeller 2.

[0074] In this way, the processing difficulty of the groove structure 1a can be reduced.

[0075] In implementation, as Figure 2As shown, during the flow of the gas in the gap 100 along the bottom 1b and the side wall 1c of the groove structure 1a, since the end face 3a of the volute tongue 3 is perpendicular to the side wall 1c of the groove structure 1a, the extending direction from the side wall 1c to the end face 3a changes. Furthermore, when the gas flows to the end face 3a of the volute tongue 3, the end face 3 has an obstructive effect on the gas. Under this obstructive effect, the gas is not easily cross-flowed into the low-pressure area with a relatively high gas flow rate. Thus, the gas flow field in the low-pressure area can be kept stable, reducing the noise.

[0076] In some possible embodiments, the included angle between the end face 3a of the volute tongue 3 and the side wall 1c of the groove structure 1a is an acute angle.

[0077] In one example, as Figure 3 shown, the groove structure 1a is a frustum-shaped groove. Both the bottom and the opening of the frustum-shaped groove are circular, and the radius of the opening is greater than that of the bottom. In the depth direction of the groove structure 1a, the diameter of the side wall 1c decreases uniformly. The end face 3 of the volute tongue 3 can be a plane, which is perpendicular to the axis 2a of the cross-flow impeller 2 and fits with the opening of the groove structure 1a.

[0078] Thus, referring to Figure 3 , during the flow of the gas in the gap 100 along the bottom 1b and the side wall 1c of the groove structure 1a, since the included angle between the end face 3a of the volute tongue 3 and the side wall 1c of the groove structure 1a is an acute angle, the change in the extending direction from the side wall 1c to the end face 3a is more obvious. Furthermore, when the gas flows to the end face 3a of the volute tongue 3, the obstructive effect of the end face 3 on the gas is more obvious. Due to the more obvious obstructive effect, the end face 3a of the volute tongue 3 can more effectively prevent the gas from cross-flowing into the low-pressure area with a relatively high gas flow rate, thus ensuring that the gas flow field in the low-pressure area remains stable and reducing the noise.

[0079] Optionally, there can be a smooth transition between the end face 3a of the volute tongue 3 and the side wall 1c of the groove structure 1a.

[0080] In one example, there can be a fillet between the end face 3a of the volute tongue 3 and the side wall 1c, and the fillet is used to smoothly transition the end face 3a of the volute tongue 3 and the side wall 1c of the groove structure 1a.

[0081] In this way, the occurrence of air vortices at the first groove edge 1m can be avoided, thereby stabilizing the gas flow field in the cross-flow fan and reducing the noise.

[0082] In some possible embodiments, at least part of the end wall of the cross-flow impeller 2 is located in the groove structure 1a, that is, the depth of the groove structure 1a is greater than the gap 100.

[0083] Referring to Figure 2, the cross-flow impeller 2 includes a shaft body 21 and an impeller body 22. The shaft body 21 is rotatably connected to the bottom 1b of the groove structure 1a. The impeller body 22 includes a wall plate 221 and blade plates 222. The wall plates 221 are located at both ends of the impeller body 22, and each wall plate 221 is connected to a shaft body 21. The wall surface of the wall plate 221 close to the bottom 1b is the end wall of the cross-flow impeller 2.

[0084] In one example, the cross-flow impeller 2 can be composed of multiple impeller monomers 23.

[0085] As Figure 8 shown, each impeller monomer 23 includes a partition plate 231 and multiple blade plate monomers 232. The cross-flow impeller 2 includes multiple partition plates 231. The shape of the partition plates 231 can be circular, and the radii of the multiple partition plates 231 are equal and concentrically arranged. Multiple blade plate monomers 232 are arranged between every two adjacent partition plates 231, and the multiple blade plate monomers 232 are circumferentially distributed. Each blade plate monomer 232 is an arc-shaped plate structure.

[0086] In this way, the processing difficulty of the cross-flow impeller 2 can be reduced.

[0087] Optionally, the number of blade plate monomers 232 in each impeller monomer 23 can be equal, and there is a phase difference between the blade plate monomers 232 in two adjacent impeller monomers 23.

[0088] In this way, the overall performance of the cross-flow impeller 2 can be improved.

[0089] Optionally, the shaft body 21 and the impeller body 22 can be integrally formed components.

[0090] In this way, the overall strength of the cross-flow impeller 2 can be improved.

[0091] Optionally, the impeller body 22 and the shaft body 21 can be coaxially arranged.

[0092] In this way, the vibration amplitude of the cross-flow impeller 2 during rotation can be reduced.

[0093] A bearing (not shown) can be sleeved on the outer circle of the shaft body 21. The outer wall of the shaft body 21 and the inner circle of the bearing can be fixedly connected through a spline. A bearing installation groove (not shown) can be provided on the bottom 1b of the groove structure 1a. The outer circle of the bearing and the bearing installation groove are fixedly connected through interference fit. Further, the rotational connection between the shaft body 21 and the bottom 1b of the groove structure 1a is realized.

[0094] In one example, the wall plate 221 can be parallel to the inner wall of the housing 1. The wall surface of the wall plate 221 close to the middle of the cross-flow impeller 2 can be in the same plane as the edge of the air inlet 11. The wall surface of the wall plate 221 far from the middle of the cross-flow impeller 2 can be located in the groove structure 1a.

[0095] In this way, the wall panel 221 will not block the gas flowing in from the air inlet 11, which can increase the air intake and air output of the cross-flow fan.

[0096] Exemplarily, the value range of the groove depth of the groove structure 1a can be [5 mm, 20 mm].

[0097] When introducing the groove structure 1a above, the groove structure 1a on the first plate body 13 is used as an example. For the specific structure of the groove structure 1a on the second plate body 14, reference can be made to the above text, and it will not be repeated here.

[0098] As Figure 5 shown, the volute tongue 3 and the volute 4 are both located in the housing 1 and are connected to the housing 1.

[0099] In this way, the volute tongue 3, the volute 4 and the inner wall of the housing 1 enclose a gas flow path connecting the air inlet 11 and the air output 12. The volute 4 and the volute tongue 3 can prevent the gas from circulating in the fan, thereby improving the efficiency of the fan.

[0100] As Figure 5 shown, the wall surface of the volute tongue 3 in the gas flow path includes a first windward surface 32, a first guide surface 31 and a first leeward surface 33. The wall surface of the volute 4 in the gas flow path includes a second windward surface (not shown), a second guide surface 41 and a second leeward surface (not shown).

[0101] Among them, the first guide surface 31 and the second guide surface 41 are the wall surfaces corresponding to the cross-flow impeller 2 in the volute tongue 3 and the volute 4 respectively. The first windward surface 32 and the second windward surface are the wall surfaces of the volute tongue 3 and the volute 4 close to the air inlet 11 respectively. The first leeward surface 33 and the second leeward surface are the wall surfaces of the volute tongue 3 and the volute 4 close to the air outlet 12 respectively.

[0102] In one example, the maximum distance from the second guide surface 41 of the volute 4 to the axis 2a is less than the minimum distance from the second groove edge 1n of the groove structure 1a to the axis 2a.

[0103] Among them, the second groove edge 1n is the groove edge corresponding to the volute 4 in the groove structure 1a.

[0104] In practice, the area between the second guide surface 41 of the volute and the cross-flow impeller 2 is also a low-pressure area. In the low-pressure area, the flow velocity of the gas is relatively large. If a large amount of gas in the gap 100 flows into the low-pressure area between the second guide surface 41 and the cross-flow impeller 2, it will also cause the gas flow field in this low-pressure area to be chaotic, resulting in a large amount of noise.

[0105] In this example, the distance from the point on the second guide surface 41 to the axis 2a is less than the distance from the point on the second groove edge 1n to the axis 2a. Refer toFigure 2 , the end face 4a of the volute 4 is closer to the axis 2a than the groove wall 1c of the groove structure 1a. For the gas flowing out of the gap 100, the end face 4a of the volute 4 is equivalent to a stepped structure, which has an obstructive effect on the gas, reducing the gas flow rate flowing through the gap 100 to this low-pressure area, thereby reducing noise.

[0106] Next, some optional structural features of the cross-flow fan will be introduced separately:

[0107] Structural Feature 1: The first guiding surface 31 of the volute tongue 3 has a plurality of protruding structures 311, and the plurality of protruding structures 311 are arranged in sequence along the axis 2a.

[0108] As Figure 4 shown, the first guiding surface 31 has a plurality of protruding structures 311. The protruding structures 311 have a plate-like structure, and each protruding structure 311 is perpendicular to the axis 2a.

[0109] In implementation, although the end face 3a of the volute tongue 3 has a blocking effect on the gas in the gap 100, there will still be a small amount of gas flowing through the gap 100 to the low-pressure area. By arranging a plurality of protruding structures 311 on the first guiding surface 31, the flowing-through gas can be obstructed from flowing along the axis 2a in the low-pressure area. Thus, the gas flow field in the low-pressure area can be ensured to be stable, and noise can be reduced.

[0110] Optionally, the distance between two adjacent protruding structures 311 can be equal. And, the thickness of each protruding 311 in the direction of the axis 2a can be equal.

[0111] In this way, the processing difficulty of the plurality of protruding structures 311 can be reduced.

[0112] Optionally, the protruding structure 311 and the volute tongue 3 can be an integrally formed part.

[0113] In this way, the processing difficulty of the volute tongue 3 can be reduced, and at the same time, the connection strength between the protruding structure 311 and the first guiding surface 31 can be improved.

[0114] The processing method of the volute tongue 3 with the protruding structure 311 can be casting processing or cutting processing. The embodiments of the present disclosure do not limit the processing method of the volute tongue 3 with the protruding structure 311.

[0115] Optionally, both ends of each protruding structure 311 can be respectively connected to the first intersection line 3m and the second intersection line 3n.

[0116] Among them, the first intersection line 3m is the intersection line of the first guiding surface 31 and the first windward surface 32 of the volute tongue 3, and the second intersection line 3n is the intersection line of the first guiding surface 31 and the first leeward surface 33 of the volute tongue 3.

[0117] In this way, within the region corresponding to the entire flow guiding surface 31, the convex structures 311 all have an obstructive effect on the axially flowing gas, which can enhance the effect of obstructing the cross-flow gas. Thus, the gas flow field in the low-pressure region is ensured to be stable, and the noise is further reduced.

[0118] In one example, both the volute tongue 3 and the volute casing 4 are hollow structures.

[0119] In this way, the overall weight of the cross-flow fan can be reduced, and the assembly difficulty of the cross-flow fan can be reduced.

[0120] Structural feature two: The cross-flow fan may further include a heat exchange component 5.

[0121] The heat exchange component 5 is a component in the cross-flow fan used for heat exchange with the gas flowing out of the cross-flow impeller 2.

[0122] Reference Figure 2 , the first plate body 13, the second plate body 14, the volute tongue 3 and the volute casing 4 of the housing 1 enclose a gas flow passage communicating the air inlet 11 and the air outlet 12.

[0123] Reference Figure 7 , the heat exchange component 5 is located in the housing 1, and is located between the gas flow passage and the air outlet 12, and is connected to the housing 1.

[0124] In one example, reference Figure 6 , the heat exchange component 5 includes a plurality of heat exchange tubes 51 and a covering member 52.

[0125] Among them, a refrigerant flows through the heat exchange tubes 51, the covering member 52 is made of a porous material, and gas can pass from one side of the covering member 52 to the other side.

[0126] Exemplarily, the material of the covering member 52 may be foam or the like, and the embodiments of the present disclosure do not limit this.

[0127] In this way, by selecting foam as the covering member 52, since the foam 52 has good adsorption properties, the dust mixed in the gas can be adsorbed, thereby improving the cleanliness of the indoor air.

[0128] In implementation, air enters the cross-flow fan through the air inlet 11, and then, after passing through the heat exchange component 5, the air is discharged from the cross-flow fan through the air outlet 12. During the process of the air passing through the heat exchange component 5, heat exchange occurs between the air and the heat exchange component 5. When the temperature of the refrigerant in the heat exchanger is lower than the air temperature, the air cools down, and when the temperature of the refrigerant in the heat exchanger is higher than the air temperature, the air heats up. Subsequently, the air that has completed the heat exchange is discharged from the cross-flow fan through the air outlet 12 to adjust the room temperature.

[0129] Optionally, the heat exchange component 5 further includes a fixing member 53.

[0130] In implementation, the heat exchange assembly 5 includes two fixing members 53, one of the fixing members 53 is connected to the first plate body 13, and the other fixing member 53 is connected to the second plate body 14. The fixing member 53 is used to fixedly connect the heat exchange tube 51.

[0131] In this way, the connection stability between the heat exchange assembly 5 and the housing 1 can be improved.

[0132] Structural feature three: The cross-flow fan further includes a motor 6.

[0133] As Figure 4 shown, the housing 1 has a motor mounting groove 1d inside, and the motor mounting groove 1d is used to accommodate the motor 6. As Figure 3 shown, the motor 6 is located in the motor mounting groove 1d and is connected to the housing 1.

[0134] The connection manner between the motor 6 and the housing 1 can be welding or bolt connection. The embodiments of the present disclosure do not limit the connection manner between the motor 6 and the housing 1.

[0135] In one example, the motor 6 and the housing 1 are detachably connected by bolts.

[0136] In this way, the assembly efficiency between the motor 6 and the housing 1 can be improved. At the same time, when the motor 6 of the cross-flow fan fails, it is convenient to quickly disassemble the motor 6 from the housing 1, and the disassembly efficiency between the motor 6 and the housing 1 can be improved.

[0137] The motor mounting groove 1d is communicated with the accommodating space where the cross-flow impeller 1 is located through a through hole. The output shaft of the motor 6 passes through the above through hole and is connected to the cross-flow impeller 2. Thus, the rotation of the output shaft of the motor 6 drives the cross-flow impeller 1 to rotate. Correspondingly, referring to Figure 3 , on the end wall of the cross-flow impeller 2 close to the motor 6, there is a motor output shaft mounting hole 2b, and the motor output shaft mounting hole 2b is used to fixedly connect the output shaft of the motor 6 and the end wall of the cross-flow impeller 2.

[0138] In one example, the connection manner between the end wall of the cross-flow impeller 2 close to the motor 6 and the output shaft of the motor 6 can be key connection.

[0139] In this way, the connection stability between the cross-flow impeller 2 and the output shaft of the motor 6 can be improved.

[0140] The technical solutions provided by the embodiments of the present disclosure at least include the following beneficial effects:

[0141] An embodiment of the present disclosure provides a cross-flow fan. In this cross-flow fan, the inner wall of the housing 1 has a groove structure 1a. The cross-flow impeller 2 is located inside the housing 1. There is a gap 100 between the end of the cross-flow impeller 2 and the bottom 1b of the groove structure 1a, and it is rotationally connected to the groove structure 1a. The volute tongue 3 is located inside the housing 1 and is connected to the inner wall of the housing 1. The maximum distance from the first guiding surface 31 of the volute tongue 3 to the axis 2a of the cross-flow impeller 2 is less than the minimum distance from the first groove edge 1m of the groove structure 1a to the axis 2a and / or the maximum distance from the second guiding surface 41 of the volute 4 to the axis 2a is less than the minimum distance from the second groove edge 1n of the groove structure 1a to the axis 2a. In this way, the distance from the points on the first guiding surface 31 to the axis 2a is less than the distance from the points on the first groove edge 1m to the axis 2a. The end face 3a of the volute tongue 3 is closer to the axis 2a relative to the groove wall 1c of the groove structure 1a. For the gas flowing out of the gap 100, the end face 3a of the volute tongue 3 is equivalent to a stepped structure. Similarly, the end face 4a of the volute 4 is also equivalent to a stepped structure. The stepped structure has an obstructive effect on the gas, which can reduce the gas flow rate flowing from the gap 100 to the low-pressure area, thereby reducing noise.

[0142] An embodiment of the present disclosure provides an air supply device. This air supply device includes the above-mentioned cross-flow fan. This air supply device can be an air conditioner or a tower fan. The embodiment of the present disclosure does not limit the type of the air supply device.

[0143] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A crossflow fan, characterized in that: The crossflow fan comprises a housing (1), a crossflow fan wheel (2), a volute tongue (3) and a volute (4); The inner wall of the housing (1) has a groove structure (1a); The crossflow fan wheel (2) is located in the housing (1), a gap (100) is provided between an end of the crossflow fan wheel (2) and a groove bottom (1b) of the groove structure (1a), and the crossflow fan wheel (2) is rotatably connected to the groove structure (1a); The volute tongue (3) and the volute casing (4) are both located inside the housing (1) and connected to the inner wall of the housing (1); The maximum distance between the first guide surface (31) of the volute tongue (3) and the axis (2a) of the crossflow impeller (2) is smaller than the minimum distance between the first groove eave (1m) of the groove structure (1a) and the axis (2a), and / or the maximum distance between the second guide surface (41) of the volute (4) and the axis (2a) is smaller than the minimum distance between the second groove eave (1n) of the groove structure (1a) and the axis (2a), wherein the first groove eave (1m) is the groove eave in the groove structure (1a) that is in contact with the volute tongue (3), and the second groove eave (1n) is the groove eave in the groove structure (1a) that corresponds to the volute (4).

2. The crossflow fan according to claim 1, characterized in that: The groove structure (1a) is a circular groove.

3. The crossflow fan according to claim 2, characterized in that: The circular groove is coaxially arranged with the crossflow impeller (2).

4. The crossflow fan according to claim 1, characterized in that: The groove wall (1c) of the groove structure (1a) is perpendicular to the end surface (3a) of the volute tongue (3).

5. The crossflow fan according to claim 1, characterized in that: The angle between the groove wall (1c) of the groove structure (1a) and the end surface (3a) of the volute tongue (3) is an acute angle.

6. The crossflow fan according to claim 1, characterized in that: The groove depth of the groove structure (1a) is greater than the gap (100).

7. The crossflow fan according to claim 1, characterized in that: The first flow-guiding surface (31) has a plurality of protruding structures (311), and the plurality of protruding structures (311) are arranged along the axis (2a).

8. The crossflow fan according to claim 7, characterized in that: The two ends of each protruding structure (311) are respectively connected to a first intersection line (3m) and a second intersection line (3n), wherein the first intersection line (3m) is the intersection line of the first flow guide surface (31) and the first windward surface (32) of the volute tongue (3), and the second intersection line (3n) is the intersection line of the first flow guide surface (31) and the first leeward surface (33) of the volute tongue (3).

9. The cross flow fan according to any one of claims 1 to 8, characterized in that: The first flow guide surface (31) has a plurality of protruding structures (311), and the plurality of protruding structures (311) are arranged in sequence along the axis (2a) of the crossflow impeller (2).

10. An air supply device, characterized in that: The air supply device includes the cross-flow blower according to any one of claims 1 to 9.

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