Integrated current collector and fan

Abstract

The application relates to an integrated current collector and a fan, which can ensure integrated processing while enhancing airflow pre-whirl effect and improving pneumatic performance. The integrated current collector is arranged at an air inlet of a volute and comprises an air inlet ring arranged on the volute and a plurality of trapezoidal convexes. The trapezoidal convexes are integrally formed on the air inlet ring, and the trapezoidal convexes are arranged at intervals along the circumference of the air inlet ring to form a guide groove for guiding airflow pre-whirl between any two adjacent trapezoidal convexes, and a trapezoidal guide surface is provided on the windward surface of the trapezoidal convex.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an integrated flow collector and fan. BACKGROUND

[0002] In the development and design process of the range hood, the air volume and noise performance are important indicators for evaluating the oil fume absorption effect and noise experience of the range hood. In order to enable the range hood to produce lower noise (referred to as aerodynamic performance) under a certain air volume, a conventional scheme is to provide a flow collector at the inlet of the volute of the range hood.

[0003] At present, the structure of the flow collector is being continuously improved and optimized to obtain more excellent aerodynamic performance. Among the many optimization directions of the flow collector structure, providing a spiral structure on the surface of the flow collector to guide the pre-rotation of the airflow is an effective method to improve the aerodynamic performance.

[0004] However, the flow collector with a spiral structure usually has an additional sheet-shaped flow guide structure, which can guide the pre-rotation of the airflow, but these sheet-shaped flow guide structures are difficult to be integrally formed and processed with the flow cover, and often need to be separately processed and then assembled together. Obviously, the more complex these sheet-shaped flow guide structures are, the more difficult the processing and assembly are, and the higher the cost is. SUMMARY

[0005] Therefore, it is necessary to solve the problem of high processing and assembly difficulty and high cost of the conventional flow collector with a spiral structure. The present application provides an integrated flow collector and fan, which can ensure integrated processing while enhancing the pre-rotation effect of the airflow and improving the aerodynamic performance.

[0006] In an embodiment of the present application, the present application provides an integrated flow collector for being provided at the inlet of a volute, comprising:

[0007] an inlet ring for being fixedly arranged at the volute; and

[0008] a plurality of trapezoidal convexes, wherein the trapezoidal convexes are integrally formed on the inlet ring, and the plurality of trapezoidal convexes are arranged at intervals along the circumference of the inlet ring to form a flow guide groove for guiding the pre-rotation of the airflow between any two adjacent trapezoidal convexes, and to provide a trapezoidal flow guide surface through the windward surface of the trapezoidal convex.

[0009] According to an embodiment of the present application, the inlet ring has an annular outer ring region for fixedly connecting with the volute, an annular inner ring region for extending backward into the volute, and an annular profiled region extending inward from the annular outer ring region to the annular inner ring region; the annular profiled region is discontinuously profiled to form the trapezoidal convexes and the flow guide groove.

[0010] According to one embodiment of the present application, the trapezoidal guide surface of the trapezoidal convex has a bottom edge flush with the annular outer ring region, a top edge parallel to the annular outer ring region and shorter than the bottom edge, and a pair of waist edges gradually extending from the bottom edge to the top edge; the waist angle of the trapezoidal guide surface is between 40° and 70°.

[0011] According to one embodiment of the present application, the connection between the trapezoidal convex and the annular outer ring region is provided with a first transition round corner, and the radius R1 of the first transition round corner satisfies the relationship: 0.2×Δd1≤R1≤0.8×Δd1; in the formula, Δd1 is the die depth of the annular die region.

[0012] According to one embodiment of the present application, the trapezoidal convex is provided with a second transition round corner at the connection between the waist edge and the top edge; the radius of the second transition round corner is equal to the radius of the first transition round corner.

[0013] According to one embodiment of the present application, the trapezoidal guide surface of the trapezoidal convex extends obliquely relative to the annular outer ring region, and the taper of the trapezoidal guide surface is between 5° and 45°.

[0014] According to one embodiment of the present application, the inlet width of the guide groove is greater than the outlet width of the guide groove to provide a horn-shaped flow channel between two adjacent trapezoidal convexes.

[0015] According to one embodiment of the present application, the outlet width of the guide groove is between one to six times the die depth; the ratio between the inlet width of the guide groove and the outlet width of the guide groove is between 1.25 and 3.

[0016] According to one embodiment of the present application, the integrated current collector further comprises a plurality of arc convexes integrally formed in the air inlet ring and having a height less than the trapezoidal convex; wherein the arc convexes are located within the guide groove and arranged adjacent to the leeward surface of the trapezoidal convex.

[0017] According to one embodiment of the present application, the arc convex extends circumferentially from the leeward surface of the trapezoidal convex to the windward surface of another trapezoidal convex, and a gap is left between the leeward surface of the arc convex and the windward surface of the trapezoidal convex.

[0018] According to one embodiment of the present application, the top surface of the trapezoidal convex extends tapering from outside to inside; the ratio between the width of the circumferentially narrowest part of the trapezoidal convex and the die depth is between 0.5 and 4.

[0019] According to another aspect of the present application, the present application further provides a fan, comprising:

[0020] A volute;

[0021] An impeller rotatably arranged in the volute; and

[0022] The integral collector according to any one of the above, is arranged at the air inlet of the volute.

[0023] In summary, on the one hand, since the trapezoidal convex is integrally formed with the air inlet ring, such as being processed by sheet metal profiling, the integral collector does not need to be assembled and processed as complicatedly as the traditional sheet-shaped flow guide structure, which helps to improve the aerodynamic performance while reducing the cost; on the other hand, since the windward surface of the trapezoidal convex is implemented as a trapezoidal flow guide surface, compared with the arc convex (the effective flow guide area of which is the area of the arc flow guide surface), the effective flow guide area of the trapezoidal convex of the present application will increase when the profiling depth Δd1 is unchanged, so that the guiding effect of the integral collector of the present application on the airflow is enhanced, and the aerodynamic performance of the fan is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A perspective view of a fan according to an embodiment of the present application;

[0025] Figure 2 A first example of an integral collector in a fan according to the above embodiment of the present application is shown;

[0026] Figure 3 A front view of the integral collector according to the above first example of the present application is shown;

[0027] Figure 4 A second example of an integral collector in a fan according to the above embodiment of the present application is shown; Figure 3 A-A sectional view of the integral collector shown;

[0028] Figure 5 A third example of an integral collector in a fan according to the above embodiment of the present application is shown. Figure 3 B-B sectional view of the integral collector shown;

[0029] Figure 6 A second example of an integral collector in a fan according to the above embodiment of the present application is shown;

[0030] Figure 7 A third example of an integral collector in a fan according to the above embodiment of the present application is shown.

[0031] Explanation of main element symbols:

[0032] 1, integral collector; 10, air inlet ring; 100, guide groove; 11, annular outer ring region; 12, annular inner ring region; 13, annular profiled region; 20, trapezoidal convex; 200, trapezoidal guide surface; 201, bottom side; 202, top side; 203, waist side; 204, first transition round corner; 205, second transition round corner; 30, arc convex; 2, volute; 3, impeller.

[0033] The above main element symbol explanations are further described in detail in combination with the drawings and specific embodiments. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application are described in detail below in combination with the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0035] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0038] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a mediating element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a mediating element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0039] Considering that the existing sheet-shaped flow guiding structure is difficult to be integrally formed with the collector, it often needs to be separately processed and then assembled together, and the more complex the sheet-shaped flow guiding structure is, the more difficult the processing and assembly are, and the higher the cost is. The applicant designs an integrated collector which can combine the flow collecting structure and the arc-shaped flow guiding structure together and be integrally formed, which is beneficial to reduce the manufacturing cost. However, limited by the limit of plastic deformation of the material, the profiling of the arc-shaped flow guiding structure cannot be too deep (for example, taking a galvanized sheet with a thickness of 0.7 mm as an example, the profiling depth is usually required to be less than or equal to 8 mm), which greatly limits the guiding effect of the flow guiding structure on the airflow, resulting in that the optimization effect of the collector on the aerodynamic performance is not significant. Based on this, the present application provides an integrated collector and a fan which can ensure integrated processing while enhancing the airflow pre-whirling effect and improving the aerodynamic performance.

[0040] Specifically, referring to the accompanying drawings Figure 1 An embodiment of the present application provides a fan which can include a volute 2, an impeller 3 rotatably arranged in the volute 2, and an integrated collector 1 arranged at an air inlet of the volute 2, so as to enhance the airflow pre-whirling effect and improve the aerodynamic performance through the integrated collector 1. It can be understood that the impeller of the present application can include, but is not limited to, a rotating shaft, a motor drivingly connected to the rotating shaft, and a plurality of blades arranged along the circumference of the rotating shaft, which will not be described here.

[0041] More specifically, as Figures 2 to 7As shown, the integrated collector 1 can include an air inlet ring 10 for being fixed to the volute 2 and a plurality of trapezoidal bosses 20 integrally formed on the air inlet ring 10; wherein the plurality of trapezoidal bosses 20 are arranged at intervals along the circumference of the air inlet ring 10 to form a guide groove 100 for guiding the airflow pre-rotation between any two adjacent trapezoidal bosses 20, and the windward surface of the trapezoidal boss 20 provides a trapezoidal guide surface 200. In this way, when the impeller 3 rotates relative to the volute 2 to form a negative pressure in the volute 2, the external air first flows through the guide groove 100 of the integrated collector 1 to be pre-rotated under the action of the negative pressure, and then flows into the volute 2, which helps to improve the aerodynamic performance.

[0042] Notably, on the one hand, since the trapezoidal boss 20 is integrally formed with the air inlet ring 10, such as by sheet metal forming, the integrated collector 1 does not need to be assembled and processed as complicatedly as the traditional sheet-shaped guide structure, which helps to improve the aerodynamic performance while reducing costs; on the other hand, since the windward surface of the trapezoidal boss 20 is implemented as a trapezoidal guide surface 200, compared to an arc-shaped boss (whose effective guide area is the area of the arc-shaped guide surface), the effective guide area (i.e. the area of the trapezoidal guide surface 200) of the trapezoidal boss 20 of the present application will increase under the same profile depth Δd1, so that the guiding effect of the integrated collector 1 of the present application on the airflow is enhanced, and the aerodynamic performance of the fan is improved. It can be understood that since the airflow mainly changes the flow direction under the guidance of the windward surface of the boss to form a tangential pre-rotation airflow, the integrated collector 1 of the present application can enhance the guiding effect of the collector on the airflow by increasing the effective guide area of the windward surface, so as to improve the aerodynamic performance.

[0043] Exemplarily, in the first example of the present application, as Figures 2 to 5 shown, the air inlet ring 10 can have an annular outer ring region 11 for fixed connection with the volute 2, an annular inner ring region 12 for extending rearward into the volute 2, and an annular profiled region 13 extending inward from the annular outer ring region 11 to the annular inner ring region 12; the annular profiled region 13 is intermittently profiled to form the trapezoidal bosses 20 and the guide grooves 100 alternately. It can be understood that the center of the air inlet ring 10 mentioned in the present application corresponds to the center of rotation of the impeller 3.

[0044] Optionally, in the above-mentioned first example of the present application, as Figure 2 and Figure 4As shown, the trapezoidal flow guide surface 200 of the trapezoidal convex 20 has a bottom edge 201 flush with the annular outer ring region 11, a top edge 202 parallel to the annular outer ring region 11 and shorter than the bottom edge 201, and a pair of waist edges 203 gradually extending from the bottom edge 201 to the top edge 202, so that the external airflow can be obliquely diverted along the waist edges 203 when passing through the trapezoidal convex 20, which is conducive to reducing airflow resistance.

[0045] Optionally, the face type of the trapezoidal flow guide surface 200 is implemented as an isosceles trapezoid, so that the lengths of the two waist edges 203 are the same. It can be understood that in other examples of the present application, the lengths of the two waist edges 203 of the trapezoidal flow guide surface 200 can also be different, which will not be described herein.

[0046] It is worth noting that although the larger the waist angle θ1 of the trapezoidal flow guide surface 200 (i.e. the included angle between the waist edge 203 and the bottom edge 201), the larger the effective flow guide area of the trapezoidal convex 20, in order to reduce the influence of the trapezoidal convex 20 on the improved flow function of the current collector itself, as shown in Figure 3 and Figure 4 the waist angle θ1 of the trapezoidal flow guide surface 200 in the present application is usually between 40° and 70°.

[0047] Preferably, the waist angle θ1 of the trapezoidal flow guide surface 200 is between 45° and 65°.

[0048] In addition, in order to further reduce the influence of the trapezoidal convex 20 on the improved flow function of the current collector itself, as shown in Figure 2 and Figure 4 the connection between the trapezoidal convex 20 and the annular outer ring region 11 is provided with a first transition round corner 204, and the radius R1 of the first transition round corner 204 satisfies the relationship: 0.2×Δd1≤R1≤0.8×Δd1; where Δd1 is the depth of the annular pressing region 13.

[0049] Preferably, the radius R1 of the first transition round corner 204 satisfies the relationship: 0.3×Δd1≤R1≤0.6×Δd1.

[0050] Further, as shown in Figure 2 and Figure 4 the trapezoidal convex 20 is provided with a second transition round corner 205 between the waist edge 203 and the top edge 202. Preferably, the radius R2 of the second transition round corner 205 is equal to the radius R1 of the first transition round corner 204.

[0051] According to the above first example of the present application, as shown in Figure 3 and Figure 5As shown, the trapezoidal flow guide surface 200 of the trapezoidal convex 20 extends obliquely relative to the annular outer ring region 11, and the taper θ2 of the trapezoidal flow guide surface 200 is between 5° and 45°, so that the deformation of the annular profiling region 13 at the trapezoidal flow guide surface 200 is mitigated, and can withstand deeper stretching, so as to increase the profiling depth of the annular profiling region 13 while ensuring the flow guiding effect, thereby increasing the effective flow guiding area of the trapezoidal convex 20. It can be understood that the taper θ2 mentioned in the present application refers to the included angle between the trapezoidal flow guide surface 200 and the perpendicular line of the annular outer ring region 11, i.e. the central axis of the air inlet ring 10.

[0052] Preferably, the taper θ2 of the trapezoidal flow guide surface 200 is between 15° and 30°.

[0053] Optionally, the leeward surface of the trapezoidal convex 20 extends obliquely relative to the annular outer ring region 11, and the taper of the leeward surface is between 5° and 45°, so that the windward surface and the leeward surface of the trapezoidal convex 20 asymptotically extend from the bottom edge 201 to the top edge 202, so that the deformation of the annular profiling region 13 at each flow guide surface of the trapezoidal convex 20 is mitigated, so as to withstand deeper stretching.

[0054] It is worth noting that, compared with the profiling depth Δd1 without increasing the taper, the limit profiling depth of the annular profiling region 13 of the present application after increasing the taper can be increased by about For example, after increasing the taper by 30°, the limit profiling depth of the galvanized sheet with a thickness of 0.7 mm can be implemented as That is, the limit profiling depth of the galvanized sheet with a thickness of 0.7 mm can be increased from 8 mm to 9.2 mm.

[0055] In addition, according to the national standard GBT17713-2022 (range hood and its cooking fume suction device), the arc convex collector and the trapezoidal convex collector with taper in the above first example of the present application were respectively tested for noise under the condition that the maximum air volume was 15 m 3 / min and the working air volume was 12 m 3 / min. It can be known that, compared with the arc convex collector, the half anechoic chamber noise and the working noise of the integrated collector 1 in the above first example of the present application were both reduced by about 0.3 dB, which significantly improves the aerodynamic performance of the fan.

[0056] In addition, although in the above first example of the present application, the inlet width and the outlet width of the flow guide groove 100 are equal to provide a parallel flow channel, in other examples of the present application, the integrated collector 1 can further improve the aerodynamic performance by improving the flow channel shape. For example, the integrated collector 1 can be provided with a flow guide groove 100 with a taper, so that the inlet width of the flow guide groove 100 is greater than the outlet width of the flow guide groove 100, thereby providing a converging flow channel. Figure 6A second example of an integrated collector 1 according to the above embodiments of this application is shown, in which the flow channel shape between the trapezoidal protrusions 20 is improved into a trumpet shape, so that more airflow flows through the guide groove 100, thereby enhancing the guiding effect of the collector on the pre-swirl of the airflow.

[0057] Specifically, compared to the first example of this application, the integrated current collector 1 of the second example of this application differs in that: Figure 6 As shown, the inlet width L of the guide channel 100 k The outlet width L is greater than that of the guide channel 100. z This design provides a funnel-shaped flow channel between two adjacent trapezoidal protrusions 20, allowing more air flowing through the integrated collector 1 to pass through the guide groove 100, thereby enhancing the guiding effect of the integrated collector 1 on airflow pre-swirl. It is understood that the inlet width L mentioned in this application... k This refers to the circumferential width of the opening on the guide channel 100 corresponding to the annular outer ring region 11; the outlet width L mentioned in this application z This refers to the circumferential width of the opening on the guide channel 100 that corresponds to the annular inner ring region 12.

[0058] In other words, in the second example of this application, the guide channel 100 extends gradually from the outer annular region 11 to the inner annular region 12 to form a funnel-shaped flow channel, so that more airflow passes through the guide channel 100, thereby better enhancing the airflow pre-swirl effect and improving the aerodynamic performance of the fan.

[0059] Optionally, such as Figure 6 As shown, the outlet width L of the guide channel 100 z Typically, the molding depth Δd1 in the annular molding region 13 is taken between one and six times, that is: Δd1≤L z ≤6×Δd1.

[0060] Preferably, the outlet width L of the guide channel 100 z The value is taken between two and four times the molding depth Δd1, that is: 2×Δd1≤L z ≤4×Δd1.

[0061] Optionally, such as Figure 6 As shown, the inlet width L of the guide channel 100 k The outlet width L of the guide channel 100 z The ratio between them typically ranges from 1.25 to 3, that is: 1.25 × L z ≤L k ≤3×L z .

[0062] Preferably, the inlet width L of the guide channel 100 k The outlet width L of the guide channel 100 z The ratio between them takes a value between 1.5 and 2, that is: 1.5 × L z ≤L k ≤2×L z .

[0063] It is worth noting that, using the national standard GB / T 17713-2022 (range hoods and their cooking fume extraction devices) as the testing standard, the trapezoidal convex collector with a funnel-shaped flow channel in the second example of this application was tested at a maximum airflow of 15m³. 3 / min and working air volume is 12m 3 Noise tests were conducted under the condition of / min, and it was found that: compared with the integrated collector of the first example of this application, the semi-anechoic chamber noise and operating noise of the integrated collector 1 in the second example of this application were reduced by about 0.1dB to 0.2dB, which further improved the aerodynamic performance of the fan.

[0064] Furthermore, when the fan is running, near the integrated collector 1, the airflow can be divided into guiding airflow and bypass airflow based on the flow path. The guiding airflow refers to the airflow flowing along the extension direction of the guide groove 100 of the integrated collector 1, while the bypass airflow refers to the airflow entering the volute 2 along the radial direction. Although the higher trapezoidal bulge 20 can enhance the pre-swirl effect of the guiding airflow, the higher trapezoidal bulge 20 may also be an obstacle to the bypass airflow, easily causing flow loss.

[0065] Experiments revealed that because the leeward side of the trapezoidal convex hull 20 has a weaker guiding effect on airflow, it does not need to have as large an area as the windward side. Therefore, the leeward side of the trapezoidal convex hull 20 can be designed as a lower surface, more closely resembling the streamlined structure of a traditional collector. For example, attached... Figure 7 A third example of the integrated collector 1 according to the above embodiments of this application is shown, which adopts a combination of high and low convex hulls to further improve aerodynamic performance.

[0066] Specifically, compared to the first example described above, the integrated current collector 1 according to the third example of this application differs in that: Figure 7 As shown, the integrated collector 1 may further include a plurality of arc-shaped protrusions 30 integrally formed on the air inlet ring 10 and having a height smaller than that of the trapezoidal protrusion 20. The arc-shaped protrusions 30 are located within the guide groove 100 and are arranged adjacent to the leeward side of the trapezoidal protrusion 20, so as to form a composite protrusion collector by combining the arc-shaped low protrusions and the trapezoidal high protrusions, thereby further improving the aerodynamic performance of the collector.

[0067] More specifically, as shown in Figure 7 the arc-shaped convex 30 extends circumferentially from the leeward side of the trapezoidal convex 20 to the windward side of the other trapezoidal convex 20, and leaves a gap between the leeward side of the arc-shaped convex 30 and the windward side of the trapezoidal convex 20, so that the windward side of each trapezoidal convex 20 retains the original trapezoidal guide surface 200 in its entirety to provide a larger effective guide area; at the same time, the leeward side of each trapezoidal convex 20 is reduced in height under the action of the arc-shaped convex 30, reducing the obstruction to the crossing airflow and reducing airflow loss. In other words, the depth of the guide groove 100 near the windward side of the trapezoidal convex 20 is greater than the depth of the guide groove 100 near the leeward side of the trapezoidal convex 20, so as to enhance the guiding effect of the windward side of the trapezoidal convex 20 on the airflow pre-rotation, while also reducing the obstruction of the trapezoidal convex 20 to the crossing airflow, which is conducive to further improving the aerodynamic performance of the collector.

[0068] Optionally, as shown in Figure 7 the top surface of the trapezoidal convex 20 tapers inwardly from the outside, so that the circumferentially narrowest part of the trapezoidal convex 20 is located on the top surface of the trapezoidal convex 20 near the annular outer ring region 11, so as to further reduce the obstruction to the crossing airflow, which is conducive to further reducing airflow loss and further improving aerodynamic performance.

[0069] Optionally, as shown in Figure 7 the width L min of the circumferentially narrowest part of the trapezoidal convex 20 is between 0.5 and 4 times the depth of the press type Δd1, i.e. 0.5×Δd1≤L min ≤4×Δd1.

[0070] Preferably, the ratio between the width L min of the circumferentially narrowest part of the trapezoidal convex 20 and the depth of the press type Δd1 is between 1 and 2, i.e. Δd1≤L min ≤2×Δd1.

[0071] It is worth noting that, according to the national standard GBT17713-2022 (Range Hood and Its Cooking Fume Exhausting Device), the noise test was conducted on the composite convex collector in the above-mentioned third example of the present application under the condition that the maximum air volume was 15m 3 / min and the working air volume was 12m 3 / min, and it was found that, compared with the integrated collector according to the above-mentioned first example of the present application, the semi-anechoic chamber noise and the working noise of the integrated collector 1 in the above-mentioned third example of the present application were reduced by about 0.2dB to 0.3dB, further improving the aerodynamic performance of the fan.

[0072] Any technical features in the above embodiments can be combined, and for the sake of brevity, not all possible combinations are described above, however, as long as the combinations do not conflict with each other, they should be considered to be within the scope of the present disclosure.

[0073] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application.

Claims

1. An integrated air collector, used for installation at the air inlet of a volute, characterized in that, include: The air inlet ring is used to fix it to the volute. and Multiple trapezoidal protrusions are integrally formed on the air inlet ring, and the multiple trapezoidal protrusions are arranged at circumferential intervals along the air inlet ring to form a guide groove for guiding airflow pre-swirl between any two adjacent trapezoidal protrusions, and to provide a trapezoidal guide surface through the windward side of the trapezoidal protrusions.

2. The integrated current collector according to claim 1, characterized in that, The air inlet ring has an annular outer ring region for fixed connection with the volute, an annular inner ring region for extending rearward into the volute, and an annular pressed region extending inward from the annular outer ring region to the annular inner ring region; the annular pressed region is intermittently pressed to form the trapezoidal convex bulge and the guide groove with alternating convex and concave shapes.

3. The integrated current collector according to claim 2, characterized in that, The trapezoidal guide surface of the trapezoidal convex hull has a bottom edge flush with the annular outer ring region, a top edge parallel to the annular outer ring region and shorter than the bottom edge, and a pair of waist edges extending gradually from the bottom edge to the top edge; the waist angle of the trapezoidal guide surface is between 40° and 70°.

4. The integrated current collector according to claim 3, characterized in that, The connection between the trapezoidal convex hull and the annular outer ring region is provided with a first transition fillet, and the radius R1 of the first transition fillet satisfies the following relationship: 0.2×Δd1≤R1≤0.8×Δd1; where Δd1 is the forming depth of the annular forming region.

5. The integrated current collector according to claim 4, characterized in that, The trapezoidal convex bulge has a second transition fillet at the connection between the waist edge and the top edge; the radius of the second transition fillet is equal to the radius of the first transition fillet.

6. The integrated current collector according to claim 2, characterized in that, The trapezoidal guide surface of the trapezoidal convex hull extends obliquely relative to the annular outer ring region, and the taper of the trapezoidal guide surface is between 5° and 45°.

7. The integrated current collector according to any one of claims 1 to 6, characterized in that, The inlet width of the guide groove is greater than the outlet width of the guide groove, so as to provide a horn-shaped flow channel between two adjacent trapezoidal convex humps.

8. The integrated current collector according to claim 7, characterized in that, The outlet width of the guide channel is between one and six times the molding depth; the ratio between the inlet width and the outlet width of the guide channel is between 1.25 and 3.

9. The integrated current collector according to any one of claims 1 to 6, characterized in that, The integrated collector further includes a plurality of arc-shaped protrusions integrally formed on the air inlet ring and having a height smaller than the trapezoidal protrusion; wherein the arc-shaped protrusions are located within the guide groove and are arranged adjacent to the leeward side of the trapezoidal protrusion.

10. The integrated current collector according to claim 9, characterized in that, The arc-shaped convex hump extends circumferentially from the leeward side of the trapezoidal convex hump toward the windward side of another trapezoidal convex hump, with a gap between the leeward side of the arc-shaped convex hump and the windward side of the trapezoidal convex hump.

11. The integrated current collector according to claim 10, characterized in that, The top surface of the trapezoidal convex humb gradually narrows from the outside to the inside; the ratio of the width of the narrowest part of the trapezoidal convex humb to the forming depth is between 0.5 and 4.

12. A fan, characterized in that, include: Snail shell; An impeller rotatably mounted on the volute; as well as The integrated collector as described in any one of claims 1 to 11, wherein the integrated collector is disposed at the air inlet of the volute.

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