Fan device and electrical appliance using the fan

Abstract

The present disclosure relates to a fan device and an electrical appliance using the fan, wherein the fan device comprises: a volute (2); and an impeller (1), which is rotatably arranged in the volute (2) around its own axis, and there is a leakage gap between the impeller (1) and the volute (2), and at least a part of the wall surface of the impeller (1) forming the leakage gap is provided with a first spoiler structure (10), which is configured to interfere with the airflow in the leakage gap.

Description

Technical Field

[0001] The present disclosure relates to the technical field of refrigeration equipment, and in particular to a fan device and an electrical appliance using the fan. Background Art

[0002] Because the fan blades need to rotate, there is a gap between them and the volute. Due to the high pressure at the outlet of the fan blades, a pressure difference is formed between the outlet of the fan and the inlet of the fan, which will cause leakage between the fan blades and the volute, also known as volume loss.

[0003] The related art mainly adopts reducing the gap between the impeller and the volute, or adopts a labyrinth structure so that the leaked gas forms a resistance area through the labyrinth channel to reduce the fan leakage.

[0004] However, these structural forms all have the problem that the size of the resistance channel is relatively constant. As the fan speed increases, the pressure difference between the fan inlet and outlet increases, and the leakage volume increases significantly. Summary of the invention

[0005] Embodiments of the present disclosure provide a fan device and an electrical appliance using the fan, which can reduce gas leakage of the fan device.

[0006] According to a first aspect of the present disclosure, there is provided a fan device, comprising:

[0007] volute; and

[0008] The impeller is rotatably arranged in the volute around its own axis, a leakage gap is provided between the impeller and the volute, and at least part of the wall surface of the impeller forming the leakage gap is provided with a first spoiler structure configured to disturb the airflow in the leakage gap.

[0009] In some embodiments, the first spoiler structure is at least axially arranged on the wall surface of the impeller close to the air outlet.

[0010] In some embodiments, at least a portion of the wall surface of the volute forming the leakage gap is provided with a second flow-disturbing structure, which is configured to disturb the airflow in the leakage gap;

[0011] The arrangement area of ​​the second spoiler structure is directly opposite to at least a portion of the arrangement area of ​​the first spoiler structure.

[0012] In some embodiments, the first flow-disturbing structure protrudes toward the leakage gap relative to the outer wall of the impeller; and / or the second flow-disturbing structure protrudes toward the leakage gap relative to the inner wall of the volute.

[0013] In some embodiments, the outer wall of the impeller and the inner wall of the volute form a leakage gap.

[0014] The first spoiler structure comprises a plurality of first protrusions, which are arranged on the outer wall of the impeller at intervals along the circumferential direction, and the extension direction of the first protrusions is consistent with the axis or the projection of the first protrusions in the longitudinal section of the impeller forms an angle with the axis; and / or

[0015] The second spoiler structure includes a plurality of second protrusions which are arranged on the inner wall of the volute at intervals along the circumferential direction. The extension direction of the second protrusions is consistent with the axis or the projection of the second protrusions in the longitudinal section of the volute forms an angle with the axis.

[0016] In some embodiments, an outer wall of at least one of the first protrusion and the second protrusion is arc-shaped.

[0017] In some embodiments, at least one of the plurality of first protrusions and the plurality of second protrusions is provided in at least two rows along the axial direction, and two adjacent rows of first protrusions are staggered along the circumferential direction.

[0018] In some embodiments, the volute includes a main housing and an air collector, the air collector is axially arranged on one side of the main housing close to the air inlet, and a leakage gap is formed between the end surface of the impeller and the surface of the air collector facing the impeller;

[0019] The first flow-disturbing structure is arranged on the end surface of the impeller facing the air collector, and the second flow-disturbing structure is arranged on the surface of the air collector facing the impeller and used to form a leakage gap.

[0020] In some embodiments, the first spoiler structure includes a plurality of third protrusions, which are arranged at intervals along the circumferential direction on the end surface of the impeller facing the air collector, and the extension direction of the third protrusions is consistent with the radial direction or forms an angle less than 90°; and / or

[0021] The second spoiler structure includes a plurality of fourth protrusions, which are circumferentially spaced on the surface of the collector facing the impeller and used to form leakage gaps. The extension direction of the fourth protrusions is consistent with the radial direction or forms an angle less than 90°.

[0022] In some embodiments, an outer wall of at least one of the third protrusion and the fourth protrusion is arc-shaped.

[0023] In some embodiments, the first spoiler structure includes a plurality of fifth protrusions, which are circumferentially spaced on the end surface of the impeller close to the air outlet, and the extension direction of the fifth protrusions is consistent with the radial direction or forms an angle less than 90°.

[0024] In some embodiments, the plurality of fifth protrusions form a sawtooth shape.

[0025] In some embodiments, the impeller has a stepped outer side wall, the stepped outer side wall includes a first side wall and a second side wall, the diameter of the first side wall is larger than the second side wall; wherein the first spoiler structure is provided on the first side wall and the second side wall.

[0026] In some embodiments, the volute includes a main housing, the main housing includes a first housing portion and a second housing portion connected to each other, and a leakage gap is formed between the first housing portion and the first side wall and between the second housing portion and the second side wall;

[0027] The first side wall is arranged close to the air outlet, and a second spoiler structure is arranged on the inner side wall of the first shell portion, which is configured to interfere with the airflow in the leakage gap.

[0028] In some embodiments, the volute further comprises an air collector, which is axially arranged on one side of the main housing close to the air inlet, a leakage gap is formed between the end face of the impeller and the surface of the air collector facing the impeller, and a leakage gap is formed between the end face of the impeller away from the air collector and the volute;

[0029] The first flow-disturbing structure is arranged on two end surfaces of the impeller in the axial direction, and the second flow-disturbing structure is arranged on the surface of the air collector facing the impeller surface and used for forming a leakage gap.

[0030] According to a second aspect of the present disclosure, an electrical appliance using a fan is provided, comprising the fan device of the above embodiment.

[0031] In some embodiments, the electrical appliance using the blower includes a heat exchange device, a refrigeration system, a vacuum cleaner, a range hood, a fan device or a humidifier.

[0032] The fan device of the disclosed embodiment, by providing a first spoiler structure on at least part of the wall surface of the leakage gap formed on the impeller, is used to interfere with the airflow in the leakage gap, which can increase the flow resistance during the airflow leakage process to reduce the flow velocity of the leaking airflow, thereby reducing the leakage amount of the airflow. In this way, the aerodynamic efficiency, total pressure and static pressure of the fan can be improved; moreover, the work capacity of the fan is improved, and on the basis of ensuring the output air volume and pressure, there is no need to increase the power consumption of the fan, and the working noise of the fan device can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0034] Figure 1 It is a schematic structural diagram of some embodiments of the impeller in the fan device disclosed in the present invention;

[0035] Figure 2 are cross-sectional views of some embodiments of the fan device disclosed herein;

[0036] Figure 3 Schematic diagrams of the structures of some embodiments of the air collector in the volute;

[0037] Figure 4 Schematic diagrams of the structures of some embodiments of the first casing portion in the volute;

[0038] Figure 5 It is a schematic diagram of the principle of gas turbulence in the fan device disclosed in the present invention;

[0039] Figure 6 is a schematic diagram of air flow leakage in the fan device disclosed in the present invention;

[0040] Figure 7 It is a structural schematic diagram of a first modified example of an impeller in a fan device disclosed in the present invention;

[0041] Figure 8 is a schematic structural diagram of a second modified example of an impeller in a fan device disclosed in the present invention;

[0042] Fig. 9 It is a schematic structural diagram of a third modified example of an impeller in a fan device disclosed in the present invention;

[0043] Fig.10 Schematic diagrams of the structures of other embodiments of the impeller in the fan device disclosed in the present invention. DETAILED DESCRIPTION

[0044] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects, unless explicitly stated not to be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0045] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0046] In addition, when an element is referred to as being "on" another element, the element may be directly on the other element, or may be indirectly on the other element with one or more intermediate elements interposed therebetween. In addition, when an element is referred to as being "connected to" another element, the element may be directly connected to the other element, or may be indirectly connected to the other element with one or more intermediate elements interposed therebetween. Hereinafter, the same reference numerals represent the same elements.

[0047] The descriptions of directions or positional relationships indicated by "upper", "lower", "top", "bottom", "front", "rear", "inner" and "outer" in this disclosure are only for the convenience of describing this disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of this disclosure. The "axial", "circumferential" and "radial" mentioned in the subsequent embodiments are all relative to the impeller.

[0048] The fans in the related technologies known to the inventors have large gap leakage, which affects the fan flow angle and changes the air intake angle to a certain extent, which interferes with the fan aerodynamic efficiency and the internal flow of the fan. Therefore, generally speaking, the larger the gap leakage, the lower the aerodynamic efficiency, the lower the total pressure, and the higher the fan noise. Moreover, the aggravated fan gap leakage also reduces the fan's work capacity, and the output air volume and pressure are low; to achieve the given air volume and pressure, the speed needs to be increased, but this will cause the fan power consumption to increase significantly and the noise to increase significantly.

[0049] In view of the above problems, the present disclosure provides a fan device, such as Figures 1 to 9 As shown, in some embodiments, it includes: a volute 2 and an impeller. The impeller 1 is rotatably arranged in the volute 2 around its own axis, and there is a leakage gap between the impeller 1 and the volute 2. Figure 6 As shown, during the process of airflow flowing from the air inlet I to the air outlet O along the first direction K1, gas leaks from the air outlet O to the air inlet I along the second direction K2, and the first direction K1 is opposite to the second direction K2.

[0050] At least part of the wall surface of the impeller 1 forming the leakage gap is provided with a first flow-disturbing structure 10, which is configured to disturb the airflow in the leakage gap.

[0051] The fan device of the disclosed embodiment, by providing a first spoiler structure on at least part of the wall surface of the leakage gap formed on the impeller, is used to interfere with the airflow in the leakage gap, which can increase the flow resistance during the airflow leakage process to reduce the flow velocity of the leaking airflow, thereby reducing the leakage amount of the airflow. In this way, the aerodynamic efficiency, total pressure and static pressure of the fan can be improved; moreover, the work capacity of the fan is improved, and on the basis of ensuring the output air volume and pressure, there is no need to increase the power consumption of the fan, and the working noise of the fan device can be reduced.

[0052] If the first spoiler structure is only provided on the volute 2, as the fan speed increases, the pressure difference between the fan inlet and outlet increases, and the leakage increases significantly. However, in this embodiment, the first spoiler structure 10 that blocks the airflow is provided on the rotating impeller 1. When the impeller 1 rotates, the first spoiler structure 10 rotates accordingly, driving the gas in the leakage gap to rotate accordingly. The faster the rotation, the better the blocking effect, and thus the lower the leakage.

[0053] In some embodiments, the first spoiler structure 10 is at least axially disposed on the wall surface of the impeller 1 close to the air outlet O. Here, "close to" means between two positions, biased toward one of the positions, rather than being in the middle of the two positions.

[0054] Since the gas flows from the air outlet O to the air inlet I in the leakage gap and the gas pressure is relatively high at the air outlet O, the gas leakage at the air outlet O is relatively large, and the leakage gradually decreases during the flow toward the air inlet I. This embodiment can prevent most of the gas leakage by providing the first spoiler structure 10 at least on the part of the impeller 1 close to the air outlet O, and the effect of preventing gas leakage is relatively obvious.

[0055] In some embodiments, Figure 4 As shown, at least part of the wall surface of the volute 2 forming the leakage gap is provided with a second spoiler structure 20, which is configured to interfere with the airflow in the leakage gap. The setting area of ​​the second spoiler structure 20 is directly opposite to at least part of the setting area of ​​the first spoiler structure 10. The setting area of ​​the second spoiler structure 20 can be completely opposite to the setting area of ​​the first spoiler structure 10, or the setting area of ​​the second spoiler structure 20 can also be directly opposite to only part of the setting area of ​​the first spoiler structure 10.

[0056] This embodiment can further enhance the airflow blocking effect by setting a second spoiler structure 20 on the stationary volute 2. When the first spoiler structure 10 rotates with the impeller 1, the leakage gap formed between the first spoiler structure 10 and the second spoiler structure 20 can better block gas leakage, thereby improving the working performance of the fan device.

[0057] like Figure 5 As shown, a first spoiler structure 10 is arranged on the side wall opposite to the impeller 1 and the volute 2, and a second spoiler structure 20 is arranged on the side wall opposite to the volute 2 and the impeller 1. A wind barrier 3 is formed between the first spoiler structure 10 and the second spoiler structure 20, which not only reduces the width of the gap through which the airflow passes, reduces the width of the leakage gap, and increases the gap leakage resistance, but also the resistance can be increased as the fan speed increases, thereby obtaining a better effect of preventing gas leakage, thereby reducing pressure loss and improving the working efficiency of the fan.

[0058] In some embodiments, Figure 1 and Figure 4 As shown, the first spoiler structure 10 protrudes toward the leakage gap relative to the outer wall of the impeller 1 ; and / or the second spoiler structure 20 protrudes toward the leakage gap relative to the inner wall of the volute 2 .

[0059] In this embodiment, the spoiler structure is designed to be a structure protruding toward the leakage gap, which can reduce the width of the leakage gap and make the airflow form a curved flow path in the leakage gap, thereby increasing the airflow resistance and reducing the airflow loss.

[0060] In some embodiments, Figure 1 and Figure 4 As shown, the outer wall of the impeller 1 forms a leakage gap with the inner wall of the volute 2. The first spoiler structure 10 includes a plurality of first protrusions 13, which are arranged on the outer wall of the impeller 1 at intervals along the circumferential direction, and the extension direction of the first protrusions 13 is consistent with the axis or the projection in the longitudinal section of the impeller 1 is at an angle to the axis; and / or the second spoiler structure 20 includes a plurality of second protrusions 24, which are arranged on the inner wall of the volute 2 at intervals along the circumferential direction, and the extension direction of the second protrusions 24 is consistent with the axis or the projection in the longitudinal section of the impeller is at an angle to the axis.

[0061] For example, a plurality of first protrusions 13 and a plurality of second protrusions 24 may be arranged at intervals along the entire circumferential direction to reduce the gas leakage amount of the leakage gap in the entire circumferential direction.

[0062] In this embodiment, the first protrusion 13 and the second protrusion 24 can prevent gas leakage in the axial direction (longitudinal direction). By arranging the first protrusion 13 and the second protrusion 24 as a structure extending in the axial direction, when the impeller 1 rotates, the first protrusion 13 and the second protrusion 24 form circumferential disturbances on the airflow, which can achieve the best effect of preventing gas leakage. Figure 7 As shown, the first protrusion 13 is arranged so that the projection of the extension direction in the longitudinal section of the impeller 1 is at an angle to the axis, and / or the second protrusion 24 is arranged so that the projection of the extension direction in the longitudinal section of the volute 2 is at an angle to the axis, which can also prevent gas leakage.

[0063] like Figure 1 As shown, the outer wall of at least one of the first protrusion 13 and the second protrusion 24 is arc-shaped, that is, the outer wall of at least one of the first protrusion 13 and the second protrusion 24 is arc-shaped in a cross section perpendicular to the leakage direction, for example, semi-arc-shaped.

[0064] Since the airflow shielding area between adjacent first protrusions 13 or adjacent second protrusions 24 is actually where vortices occur, by designing the surface of the protrusion to be an arc surface, the airflow can flow smoothly to avoid adding unnecessary resistance, thereby reducing additional consumption of the fan.

[0065] In some embodiments, Figure 1 and Figure 4As shown, the first protrusion 13 and / or the second protrusion 24 are in the shape of thin strips and extend axially. This structure is easy to process, and the protrusions continuously arranged along the axial direction can achieve a better effect of reducing airflow leakage throughout the entire length section where the protrusions are located.

[0066] In some embodiments, Fig. 9 As shown, at least one of the plurality of first protrusions 13 and the plurality of second protrusions 24 is provided in at least two rows along the axial direction, and two adjacent rows of first protrusions 13 or two adjacent rows of second protrusions 24 are staggered along the circumferential direction.

[0067] In some embodiments, Figure 2 As shown, the volute 2 includes a main housing and an air collector 23. The air collector 23 is axially arranged on the air inlet I side of the main housing, and a leakage gap is formed between the end face of the impeller 1 and the surface of the air collector 23 facing the impeller 1. The air collector 23 is used to collect the incoming gas from the fan, and cooperates with the impeller 1 to accelerate the incoming flow speed of the air flow, improve the air intake conditions of the fan, and a reasonably designed air collector can improve the efficiency of the fan and reduce noise. Among them, the first spoiler structure 10 is arranged on the end face of the impeller 1 facing the air collector 23, and the second spoiler structure 20 is arranged on the surface of the air collector 23 facing the impeller 1 and used to form a leakage gap.

[0068] This embodiment can further reduce the leakage of the fan airflow between the impeller 1 and the air collector 23 by providing a turbulent structure between the end surface of the impeller 1 and the air collector 23 .

[0069] like Figure 1 As shown, the first spoiler structure 10 includes a plurality of third protrusions 14, which are arranged on the end surface of the impeller 1 facing the air collector 23 at intervals along the circumferential direction, and the extension direction of the third protrusions 14 is consistent with the radial direction or forms an angle less than 90°; and / or as Figure 3 As shown, the second spoiler structure 20 includes a plurality of fourth protrusions 25, which are circumferentially spaced on the surface of the air collector 23 facing the impeller 1 and used to form leakage gaps, and the extension direction of the fourth protrusions 25 is consistent with the radial direction or forms an angle less than 90°.

[0070] For example, a plurality of third protrusions 14 and a plurality of fourth protrusions 25 may be arranged at intervals along the entire circumferential direction to reduce the gas leakage amount of the leakage gap in the entire circumferential direction.

[0071] In this embodiment, the third protrusion 14 and the fourth protrusion 25 can prevent gas leakage along a plane perpendicular to the axial direction (transverse direction), for example, prevent gas leakage in the radial direction. By setting the third protrusion 14 and the fourth protrusion 25 as a structure extending along the radial direction, when the impeller 1 rotates, the third protrusion 14 and the fourth protrusion 25 form a circumferential disturbance on the airflow, which can achieve the best effect of preventing gas leakage. Alternatively, the third protrusion 14 and the fourth protrusion 25 are set as a structure in which the extension direction is angled with the radial direction, which can also achieve the effect of preventing gas leakage.

[0072] In some embodiments, the outer wall of at least one of the third protrusion 14 and the fourth protrusion 25 is arc-shaped. Since the airflow shielding area between adjacent third protrusions 14 or adjacent fourth protrusions 25 is actually where vortices occur, by designing the surface of the protrusion as an arc surface, the airflow can flow smoothly to avoid adding unnecessary resistance, thereby reducing the extra consumption of the fan.

[0073] In some embodiments, Figure 4 As shown, at least one of the third protrusion 14 and the fourth protrusion 25 is in the shape of a thin strip and extends axially. This structure is easy to process, and the protrusions continuously arranged along the axial direction can achieve a better effect of reducing airflow leakage throughout the entire length section where the protrusions are located.

[0074] In some embodiments, at least one of the plurality of third protrusions 14 and the plurality of fourth protrusions 25 is provided in at least two rows in the radial direction, and two adjacent rows of third protrusions 14 or two adjacent rows of fourth protrusions 25 are staggered in the circumferential direction.

[0075] In some embodiments, Fig.10 As shown, the first spoiler structure 10 includes a plurality of fifth protrusions 15, which are arranged at intervals along the circumferential direction on the end surface of the impeller 1 close to the air outlet O, and the extension direction of the fifth protrusion 15 is consistent with the radial direction or forms an angle less than 90°. Preferably, the plurality of fifth protrusions 15 form a sawtooth shape, or the fifth protrusion 15 can also adopt other cross-sectional shapes such as an arc shape.

[0076] Since the air outlet O is a high-pressure area where air leakage is more serious, the first spoiler structure 10 is provided at the starting end of the leakage gap in this embodiment to achieve a better effect of preventing gas leakage.

[0077] In some embodiments, Figure 1 and Figure 2As shown, the impeller 1 has a stepped outer side wall, which includes a first side wall 11 and a second side wall 12, wherein the diameter of the first side wall 11 is larger than that of the second side wall 12; wherein the first spoiler structure 10 is provided on the first side wall 11 and the second side wall 12. In this embodiment, by providing the first spoiler structure 10 on the entire side wall of the impeller 1, the leakage amount can be reduced over the entire length section of the leakage gap formed between the outer side wall of the impeller 1 and the inner side wall of the volute 2, so as to obtain a better anti-leakage effect.

[0078] In some embodiments, the volute 2 includes a main housing, the main housing includes a first housing portion 21 and a second housing portion 22 connected to each other, the air collector 5 is connected to an end of the second housing portion 22 away from the first housing portion 21, and a leakage gap is formed between the first housing portion 21 and the first side wall 11, and between the second housing portion 22 and the second side wall 12. The first side wall 11 is arranged close to the air outlet O, and a second spoiler structure 20 is provided on the inner side wall of the first housing portion 21, which is configured to interfere with the airflow in the leakage gap.

[0079] This embodiment sets a first spoiler structure 10 on the first side wall 11, and sets a second spoiler structure 20 on the inner side wall of the first shell part 21 opposite to the first side wall 11. Since the first side wall 11 is located at the air outlet O of the gas leakage, the first spoiler structure 10 is set at the source of the gas leakage to cooperate with the second spoiler structure 20, which can reduce the gas leakage to a large extent. Furthermore, the first spoiler structure 10 set on the second side wall 12 can further reduce the gas leakage, thereby better ensuring the leakage requirement of the fan assembly. This embodiment can reduce the processing difficulty while reducing the gas leakage. Optionally, the second spoiler structure 20 can also be set on the second shell part 12.

[0080] Specifically, Figure 1 As shown, a plurality of first protrusions 13 are provided on the first side wall 11 and the second side wall 12 at intervals along the circumferential direction, and the first protrusions 13 extend along the axial direction. Figure 4 As shown, a plurality of second protrusions 24 are provided on the inner wall of the first housing portion 21 at intervals along the circumferential direction, and the second protrusions 24 extend along the axial direction.

[0081] In a specific embodiment, Figure 2 As shown, the impeller 1 has a stepped outer wall, which includes a first side wall 11 and a second side wall 12 , and the diameter of the first side wall 11 is larger than that of the second side wall 12 ; wherein the first spoiler structure 10 is provided on the first side wall 11 and the second side wall 12 .

[0082] The volute 2 includes a main shell, which includes a first shell portion 21 and a second shell portion 22 that are connected to each other, and leakage gaps are formed between the first shell portion 21 and the first side wall 11, and between the second shell portion 22 and the second side wall 12; wherein the first side wall 11 is arranged close to the air outlet O, and a second spoiler structure 20 is provided on the inner wall of the first shell portion 21, which is configured to interfere with the airflow in the leakage gap.

[0083] Furthermore, the volute 2 further comprises an air collector 23, which is axially arranged on one side of the main housing close to the air inlet 1, and a leakage gap is formed between the end face of the impeller 1 and the surface of the air collector 23 facing the impeller 1; a leakage gap is formed between the end face of the impeller 1 away from the air collector 23 and the volute 2. The first spoiler structure 10 is arranged on two end faces along the axial direction, and the second spoiler structure 20 is arranged on the surface of the air collector 23 facing the impeller 1 and used to form a leakage gap.

[0084] This embodiment can greatly reduce the leakage flow of the fan by arranging spoiler structures in different leakage gap sections of the fan, thereby improving the performance of the fan.

[0085] like Figure 2 As shown, a first leakage gap G1 is formed between the first side wall 11 and the first housing portion 21, a second leakage gap G2 is formed between the second side wall 12 and the second housing portion 22, and a third leakage gap G3 is formed between the end surface of the impeller 1 and the surface of the air collector 23 facing the impeller 1. The leakage amount of the airflow in the first leakage gap G1, the second leakage gap G2 and the third leakage gap G3 decreases in sequence.

[0086] Figure 7 Indicated Figure 1 A schematic diagram of the structure of the first variant of the present invention is shown. A plurality of first protrusions 13 are provided on the first side wall 11 and the second side wall 12 at intervals along the circumferential direction. The first protrusions are in a V-shaped structure, and the opening of the V-shaped structure faces the air outlet O. If the length of the first side wall 11 along the axial direction is greater than the length of the second side wall 11, the size of the V-shaped structure on the first side wall 11 can be greater than the V-shaped structure on the second side wall 12.

[0087] Figure 8 Indicated Figure 1 The first side wall 11 and the second side wall 12 are both provided with a plurality of first protrusions 13 spaced apart along the circumferential direction, and the first protrusions 13 are in a rectangular block structure. This structure is easy to process.

[0088] Fig. 9 Indicated Figure 1 The first side wall 11 and the second side wall 12 are both provided with two rows of first protrusions 13 along the axial direction, and each row of first protrusions 13 includes a plurality of first protrusions 13 along the circumferential direction, and the first protrusions 13 are in a long rectangular structure.

[0089] Optionally, the second protrusion 24, the third protrusion 14 and the fourth protrusion 25 can all be Figures 7 to 9 structure.

[0090] In the above embodiments, the height of each protrusion is a key parameter. Generally, the lower the better, provided that the allowable fan leakage can be achieved. If the protrusion is high, the fan load will increase when the fan rotates, resulting in a significant increase in the fan power consumption. In addition, additional noise will be generated. The airflow shielding point is actually the vortex generating point. What's more, due to the high protrusion, if the fan is not subjected to high-demand dynamic balancing, the eccentric load of the fan shaft will be large, resulting in shaft failure.

[0091] Secondly, the present disclosure also provides an electrical appliance using a fan, including the fan device of the above embodiment. For example, the electrical appliance using a fan can be a heat exchange device, a refrigeration system or a household appliance such as a vacuum cleaner, a range hood, a fan device, a humidifier, etc.

[0092] In some embodiments, the heat exchange device includes a heat exchanger and a fan device of the above embodiment, and the fan device is used to dissipate heat for the heat exchanger. For example, the heat exchange device can be a separate indoor unit or outdoor unit, etc. Because the fan device of the present disclosure can reduce the leakage of airflow to improve the aerodynamic efficiency, total pressure and static pressure of the fan, and improve the working capacity of the fan, on the basis of ensuring the output air volume and pressure, there is no need to increase the power consumption of the fan, so the fan assembly can provide sufficient air volume and air pressure for the heat exchanger, optimize the heat exchange effect, and at the same time reduce the working noise of the heat exchange assembly.

[0093] In some embodiments, the refrigeration system includes the fan device or the heat exchange component of the above embodiments. Since the heat exchange component has a better heat exchange effect, the refrigeration system can improve the energy efficiency of the refrigeration system and reduce the working noise.

[0094] The above is a detailed introduction to a fan device and an electrical appliance using a fan provided by the present disclosure. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core idea of ​​the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. A fan device, characterized in that: include: Volute (2); and An impeller (1) is rotatably arranged in the volute (2) about its own axis, a leakage gap is provided between the impeller (1) and the volute (2), at least a portion of the wall surface of the impeller (1) forming the leakage gap is provided with a first flow-disturbing structure (10), configured to disturb the airflow in the leakage gap; the impeller (1) has a stepped outer wall, the stepped outer wall comprises a first side wall (11) and a second side wall (12), the diameter of the first side wall (11) is larger than that of the second side wall (12), and the first side wall (11) and the second side wall (12) are provided with the first flow-disturbing structure (10); The volute (2) comprises a main shell, the main shell comprising a first shell part (21) and a second shell part (22) connected to each other, the leakage gap is formed between the first shell part (21) and the first side wall (11), and between the second shell part (22) and the second side wall (12); the first side wall (11) is arranged close to the air outlet (O), and a second spoiler structure (20) is provided on the inner side wall of the first shell part (21), which is configured to interfere with the airflow in the leakage gap.

2. The fan device according to claim 1, characterized in that: The first spoiler structure (10) is arranged at least on the wall surface of the impeller (1) close to the air outlet (O) along the axial direction.

3. The fan device according to claim 1, characterized in that: At least part of the wall surface of the volute (2) forming the leakage gap is provided with a second flow-disturbing structure (20) configured to disturb the airflow in the leakage gap; Wherein, the setting area of ​​the second spoiler structure (20) is directly opposite to at least a part of the setting area of ​​the first spoiler structure (10).

4. The fan device according to claim 3, characterized in that: The first flow-disturbing structure (10) protrudes toward the leakage gap relative to the outer wall of the impeller (1); and / or the second flow-disturbing structure (20) protrudes toward the leakage gap relative to the inner wall of the volute (2).

5. The fan device according to claim 3, characterized in that: The outer wall of the impeller (1) and the inner wall of the volute (2) form the leakage gap. The first spoiler structure (10) comprises a plurality of first protrusions (13), the plurality of first protrusions (13) being arranged at intervals along the circumferential direction on the outer wall of the impeller (1), the extension direction of the first protrusions (13) being consistent with the axis or the projection of the first protrusions (13) in the longitudinal section of the impeller (1) being at an angle to the axis; and / or The second spoiler structure (20) comprises a plurality of second protrusions (24), the plurality of second protrusions (24) being arranged at intervals along the circumferential direction on the inner side wall of the volute (2), the extension direction of the second protrusions (24) being consistent with the axis or the projection of the second protrusions (24) in the longitudinal section of the volute (2) being at an angle to the axis.

6. The fan device according to claim 5, characterized in that: The outer wall of at least one of the first protruding portion (13) and the second protruding portion (24) is arc-shaped.

7. The fan device according to claim 5, characterized in that: At least one of the plurality of first protrusions (13) and the plurality of second protrusions (24) is provided in at least two rows along the axial direction, and two adjacent rows of first protrusions (13) are staggered in the circumferential direction.

8. The fan device according to claim 3, characterized in that: The volute (2) comprises a main housing and an air collector (23); the air collector (23) is axially arranged on a side of the main housing close to the air inlet (I); the leakage gap is formed between an end surface of the impeller (1) and a surface of the air collector (23) facing the impeller (1); The first spoiler structure (10) is provided on the end surface of the impeller (1) facing the air collector (23), and the second spoiler structure (20) is provided on the surface of the air collector (23) facing the impeller (1) and used to form the leakage gap.

9. The fan device according to claim 8, characterized in that: The first spoiler structure (10) comprises a plurality of third protrusions (14), the plurality of third protrusions (14) being arranged at intervals along the circumferential direction on the end surface of the impeller (1) facing the air collector (23), and the extension direction of the third protrusions (14) being consistent with the radial direction or forming an angle less than 90°; and / or The second spoiler structure (20) comprises a plurality of fourth protrusions (25), the plurality of fourth protrusions (25) being arranged at intervals in the circumferential direction on a surface of the air collector (23) facing the impeller (1) and used to form the leakage gap, and the extension direction of the fourth protrusions (25) is consistent with the radial direction or forms an angle less than 90°.

10. The fan device according to claim 9, characterized in that: The outer wall of at least one of the third protruding portion (14) and the fourth protruding portion (25) is arc-shaped.

11. The fan device according to claim 1, characterized in that: The first spoiler structure (10) comprises a plurality of fifth protrusions (15), the plurality of fifth protrusions (15) being arranged at intervals along the circumferential direction on the end surface of the impeller (1) close to the air outlet (O), and the extension direction of the fifth protrusions (15) being consistent with the radial direction or forming an angle less than 90°.

12. The fan device according to claim 11, characterized in that: The plurality of fifth protrusions (15) are formed in a sawtooth shape.

13. The fan device according to claim 1, characterized in that: The volute (2) further comprises an air collector (23), the air collector (23) being axially arranged on a side of the main housing close to the air inlet (I), the leakage gap being formed between an end surface of the impeller (1) close to the air collector (23) and a surface of the air collector (23) facing the impeller (1), and the leakage gap being formed between an end surface of the impeller (1) away from the air collector (23) and the volute (2); The first flow-disturbing structure (10) is provided on two axial end surfaces of the impeller (1), and the second flow-disturbing structure (20) is provided on a surface of the air collector (23) facing the impeller (1) and used to form the leakage gap.

14. An electrical appliance using a fan, characterized in that: The invention comprises a fan device as described in any one of claims 1 to 13.

15. The electric appliance using a fan according to claim 14, characterized in that: The electrical appliances using the fan include heat exchange devices, refrigeration systems, vacuum cleaners, range hoods, fan devices or humidifiers.

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