Flow guide grid, fan assembly and air treatment device

Abstract

The invention discloses a flow guide grid, a fan assembly and an air treatment device, the flow guide grid comprises ring grids, first rectification strips and second rectification strips, the ring grids surround the center of the flow guide grid, the multiple ring grids are distributed at intervals in the radial direction of the flow guide grid, the first rectification strips are arranged in the ring grid on the innermost side and extend in the radial direction of the flow guide grid, and the second rectification strips extend in the radial direction of the flow guide grid. The plurality of first rectification strips are distributed along the circumferential direction of the diversion grid, the second rectification strips are arranged outside the innermost ring grid, the second rectification strips extend along the radial direction of the diversion grid and intersect with the plurality of ring grids, the plurality of second rectification strips are distributed along the circumferential direction of the diversion grid, and the number of the first rectification strips is not greater than that of the second rectification strips. The annular grids, the first rectifying strips and the second rectifying strips are matched to rectify airflow, and the number of the first rectifying strips and the number of the second rectifying strips inside and outside the annular grid on the innermost side are optimized, so that on the premise that noise is effectively reduced, the flow resistance of the flow guide grids under large flow is small, deterioration of the efficiency of the fan is reduced, and the service life of the fan is prolonged. And the efficiency of the fan is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a guide fence, a fan assembly and an air handling device. Background Art

[0002] When the fan takes in air, the turbulence in the aerodynamic area is large, which will produce harsh noise, affecting customer use and reducing the efficiency of air intake. The relevant technology adds a rectifier grid (also called a guide grid) at the air inlet to rectify the airflow entering the wind wheel, which can effectively reduce noise, but it will also have a certain impact on the air volume, wind pressure or efficiency, so it is necessary to make improvements. Summary of the Invention

[0003] The present application aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the present application proposes a guide fence.

[0004] To achieve the above objectives, the present application discloses a guide fence, which comprises:

[0005] A ring grid surrounds the center of the guide grid, and a plurality of the ring grids are distributed at intervals along the radial direction of the guide grid;

[0006] a first rectifying bar disposed in the innermost ring grid, the first rectifying bar extending in the radial direction of the guide grid, and a plurality of the first rectifying bars distributed around the center of the guide grid along the circumference of the guide grid; and

[0007] a second rectifying bar disposed outside the innermost ring grid, the second rectifying bar extending in a radial direction of the guide grid and intersecting with a plurality of the ring grids, the plurality of second rectifying bars being distributed around the center of the guide grid and along the circumference of the guide grid;

[0008] The number of the first rectifying bars is not greater than the number of the second rectifying bars.

[0009] In some embodiments of the present application, the number of the second rectifying bars is 1 to 30 times the number of the first rectifying bars.

[0010] In some embodiments of the present application, the number of the second rectifying bars is 2 to 15 times the number of the first rectifying bars.

[0011] In some embodiments of the present application, one end of the plurality of first rectifying bars intersects at the center of the guide grid, and the other end intersects with the innermost ring grid.

[0012] In some embodiments of the present application, the plurality of first straightening bars are evenly distributed along the circumference of the guide fence.

[0013] In some embodiments of the present application, the plurality of second straightening bars are evenly distributed along the circumference of the guide fence.

[0014] In some embodiments of the present application, the plurality of ring gates are evenly distributed along the radial direction of the guide gate.

[0015] In some embodiments of the present application, the windward side of the first straightening strip is concave, and the windward side of the second straightening strip is convex.

[0016] In some embodiments of the present application, in a direction approaching the center of the guide fence, the thickness of the first straightening bar along the axial direction of the guide fence gradually increases.

[0017] In some embodiments of the present application, the thickness of the second rectifying strip along the axial direction of the guide fence remains constant.

[0018] In some embodiments of the present application, a first plane is defined, which is downstream of the guide fence and moves toward the guide fence along the axial direction of the guide fence until it contacts the guide fence, and the distance H1 between the windward side of the innermost ring fence and the first plane along the axial direction of the guide fence is the maximum dimension of the guide fence along its axial direction.

[0019] In some embodiments of the present application, a second plane is defined, and the second plane moves toward the guide fence along the axial direction of the guide fence downstream of the guide fence until it contacts the second straightening bar, and the minimum distance H2 between the first straightening bar and the second plane along the axial direction of the guide fence is not less than 0 mm.

[0020] In some embodiments of the present application, H2=0.4*H1~0.75*H1 is satisfied.

[0021] The present application also discloses a fan assembly, which includes a fan and the above-mentioned guide fence, and the guide fence is arranged in the air inlet direction of the fan.

[0022] The present application also discloses an air treatment device, which includes a cabinet and the above-mentioned fan assembly, and the fan assembly is arranged in the cabinet.

[0023] The technical aspect of the present application realizes the rectification of the airflow through the coordination of the ring grid, the first rectifying strip and the second rectifying strip, and by optimizing the number of the first rectifying strip and the second rectifying strip inside and outside the innermost ring grid, the flow resistance of the guide grid can be made smaller under large flow rates while effectively reducing noise, thereby reducing the deterioration of the efficiency of the fan and ensuring the efficiency of the fan.

[0024] Other advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other designs can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 A partial schematic diagram of an air treatment device in some embodiments;

[0027] Figure 2 Schematic diagram of the coordination between the guide grid and the wind wheel in some embodiments;

[0028] Figure 3 Schematic diagram of the guide grid in some embodiments (the number of the first rectifying bars is 6);

[0029] Figure 4 for Figure 3 The enlarged view shown in the figure marked A;

[0030] Figure 5 Schematic diagram of the guide grid in some embodiments (axial observation);

[0031] Figure 6 for Figure 5 Middle AA cross-sectional view (the thickness of the first rectifying strip gradually increases in the direction approaching the center of the guide grid);

[0032] Figure 7 is a cross-sectional view of a guide grid in some embodiments (the thickness of the first straightening strip gradually decreases in a direction approaching the center of the guide grid);

[0033] Figure 8 Schematic diagram of the guide grid in some embodiments (the number of the first rectifying bars is 8);

[0034] Figure 9 Schematic diagram of the guide grid in the comparison scheme.

[0035] Description of Figure Numbers:

[0036] Guide fence 100, center 110, fan assembly 200, wind wheel 210, air handling device 300, cabinet 310, ring fence 1000, first ring fence 1001, second ring fence 1002, third ring fence 1003, fourth ring fence 1004, fifth ring fence 1005, windward side 1100, first straightening strip 2000, windward side 2100, leeward side 2200, second straightening strip 3000, windward side 3100, leeward side 3200, first plane 4100, second plane 4200.

[0037] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0039] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In this application, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] This application proposes a guide fence 100, combined with Figure 2 、 Figure 3 and Figure 4As shown, the guide fence 100 includes a ring fence 1000, a first straightening bar 2000 and a second straightening bar 3000; the ring fence 1000 surrounds the center 110 of the guide fence 100, and a plurality of ring fences 1000 are arranged at intervals along the radial direction of the guide fence 100; the first straightening bar 2000 is arranged in the innermost ring fence 1000, and the first straightening bar 2000 extends along the radial direction of the guide fence 100, and a plurality of first straightening bars 2000 surround the guide fence 100. The first straightening bars 2000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the second straightening bars 3000 are arranged outside the innermost ring fence 1000, and the second straightening bars 3000 extend along the radial direction of the guide fence 100, so as to intersect with multiple ring fences 1000, and the multiple second straightening bars 3000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the number of the first straightening bars 2000 is designed to be no greater than the number of the second straightening bars 3000.

[0043] The airflow is rectified by the coordination of the ring grid 1000, the first straightening strip 2000 and the second straightening strip 3000, and by optimizing the number of the first straightening strip 2000 and the second straightening strip 3000 inside and outside the innermost ring grid 1000, the flow resistance of the guide grid 100 can be reduced at large flow rates while effectively reducing noise, thereby reducing the deterioration of the efficiency of the fan and ensuring the efficiency of the fan.

[0044] Specifically, the guide fence 100 is installed in the air inlet direction of the fan (not shown in the figure). For example, the fan includes a motor and a wind wheel 210 connected to the motor. The motor can drive the wind wheel 210 to rotate. The rotation of the wind wheel 210 forms a negative pressure, thereby achieving the suction of the airflow. The airflow enters the wind wheel 210 from the air inlet of the wind wheel 210 and is then thrown out from the air outlet of the wind wheel 210. The guide fence 100 is arranged upstream of the air inlet of the wind wheel 210. When the airflow flows, it first flows through the guide fence 100, and after being rectified by the guide fence 100, continues to pass through the air inlet and enters the wind wheel 210, and is then thrown out from the air outlet of the wind wheel 210.

[0045] The ring grating 1000 is roughly annular, and the ring shape can be a circular ring, a square ring (such as a rectangle), or other shapes. In this embodiment, the circular ring grating 1000 is used as an example for description. The ring grating 1000 is designed to surround the center 110 of the guide gate 100. In this embodiment, the number of ring gratings 1000 includes multiple. The multiple in this article means two or more, which can be two, three, four, five, six or more. The multiple ring gratings 1000 are designed to be arranged at intervals along the radial direction of the guide gate 100. It can be understood that since the ring grating 1000 needs to surround the center 110 of the guide gate 100 and the number of the ring gratings 1000 is multiple, the multiple radial intervals arranged around the guide gate 100 should be understood as the diameter of the ring grating 100 gradually increases along the radial direction of the guide gate 100 and away from the center 110 of the guide gate 100, so that the multiple ring gratings 1000 are surrounded in sequence. For example Figure 3 The invention includes five ring gates 1000, namely a first ring gate 1001, a second ring gate 1002, a third ring gate 1003, a fourth ring gate 1004 and a fifth ring gate 1005. The diameters of the first ring gate 1001, the second ring gate 1002, the third ring gate 1003, the fourth ring gate 1004 and the fifth ring gate 1005 increase in sequence. The second ring gate 1002 surrounds the first ring gate 1001, the third ring gate 1003 surrounds the second ring gate 1002, the fourth ring gate 1004 surrounds the third ring gate 1003, and the fifth ring gate 1005 surrounds the fourth ring gate 1004. Thus, among the five ring gates 1000, the first ring gate 1001 is located at the innermost side and has the smallest diameter, while the fifth ring gate 1005 is located at the outermost side and has the largest diameter.

[0046] The first straightening bar 2000 is arranged in the innermost ring grid 1000 (taking five ring grids 1000 as an example, the innermost ring grid 1000 is the first ring grid 1001, the same below). The first straightening bar 2000 needs to extend along the radial direction of the guide grid 100, and multiple first straightening bars 2000 need to surround the center 110 of the guide grid 100 and be distributed along the circumference of the guide grid 100, so that the multiple first straightening bars 2000 surround the center 110 of the guide grid 100 in a radial pattern. The adjacent first straightening bars 2000 are spaced apart by a preset angle. When the airflow flows through the innermost ring grid 1000, it is rectified by the first straightening bars 2000.

[0047] The second straightening bar 3000 is arranged outside the innermost ring grid 1000. The second straightening bar 3000 needs to be extended along the radial direction of the guide grid 100 so that it can intersect with multiple ring grids 1000. In this way, the second straightening bar 3000 is fixed to the multiple ring grids 1000. The multiple second straightening bars 3000 need to be distributed around the center 110 of the guide grid 100 and along the circumference of the guide grid 100. In this way, the adjacent second straightening bars 3000 are spaced at a preset angle. When the airflow flows through the outside of the innermost ring grid 1000, it is rectified by the second straightening bar 3000 and the ring grid 1000.

[0048] When air flows through the guide grid 100, the airflow is rectified by the cooperation of the ring grid 1000, the first straightening bar 2000, and the second straightening bar 3000. The first straightening bar 2000 is disposed within the innermost ring grid 1000. The first straightening bar 2000 can straighten the airflow flowing through the innermost ring grid 1000, preventing the airflow from directly passing through the innermost ring grid 1000. It can be understood that, along the radial direction of the air inlet of the fan, the closer to the center of the air inlet, the lower the unevenness of the air flow, and the farther away from the center of the air inlet, the higher the unevenness of the air flow. When the air flow passes through the innermost ring grid 1000, it is rectified by the first rectifying bar 2000, and when the air flow passes through the outside of the innermost ring grid 1000, it is rectified by the second rectifying bar 3000 and the ring grid 1000. By designing the number of the first rectifying bars 2000 to be no greater than the number of the second rectifying bars 3000, the flow resistance of the air flow when flowing through the innermost ring grid 1000 can be reduced, thereby reducing the deterioration effect on the efficiency of the fan, and ensuring that the air flow can achieve better rectification and noise reduction through the cooperation of the second rectifying bar 3000 and the ring grid 1000 when flowing through the outside of the innermost ring grid 1000. Through such cooperation, noise reduction and flow resistance are taken into account, thereby ensuring the efficiency of the fan.

[0049] Further, combined with Figure 3 and Figure 8 As shown, in some embodiments of the present application, the number of first straightening bars 2000 needs to be less than the number of second straightening bars 3000 to further optimize the straightening effect of the guide grille 100. As mentioned above, along the radial direction of the fan's air inlet, the closer to the center of the air inlet, the less uneven the airflow, and the farther away from the center of the air inlet, the greater the unevenness of the airflow. By designing a larger number of second straightening bars 3000, the airflow flowing outside the innermost ring grille 1000 becomes more uniform, further improving the noise reduction effect. The smaller number of first straightening bars 2000 can achieve a corresponding straightening effect for airflow with less unevenness, while ensuring lower airflow resistance in this area, thereby further improving the straightening effect of the guide grille 100.

[0050] Through extensive experiments, the inventors have designed the number of the first straightening bars 2000 and the second straightening bars 3000 to be coordinated so that when the number of the second straightening bars 3000 is 1 to 30 times the number of the first straightening bars 2000, the guide grid 100 has a relatively good straightening effect. For example, the number of the second straightening bars 3000 is 1, 2, 4, 7, 10, 15, 20, 25, or 30 times the number of the first straightening bars 2000. In particular, when the number of the second straightening bars 3000 is 2 to 15 times the number of the first straightening bars 2000, the straightening effect of the guide grid 100 is even better. This also prevents the second straightening bars 3000 from being too densely packed together and increasing resistance.

[0051] Combine Figure 3 As shown, in some embodiments of the present application, one end of the plurality of first rectifying bars 2000 intersects at the center 110 of the guide grid 100, and the other end of the plurality of first rectifying bars 2000 intersects with the innermost ring grid 1000, so that the first rectifying bars 2000, the second rectifying bars 3000 and the ring grid 1000 are combined into a whole.

[0052] Specifically, the second straightening bars 3000 extend along the radial direction of the guide grid 100 and intersect with the multiple ring grids 1000, so that the multiple second straightening bars 3000 and the multiple ring grids 1000 can be fixed to each other. In this embodiment, by intersecting one end of the multiple first straightening bars 2000 at the center 110 of the guide grid 100, and the other end of the multiple first straightening bars 2000 intersecting with the innermost ring grid 1000, the first straightening bars 2000, the second straightening bars 3000 and the ring grid 1000 are combined together. For example, the multiple first straightening bars 2000, the multiple second straightening bars 3000 and the multiple ring grids 1000 are prepared by integral injection molding. Except for the first straightening bars 2000, there may be no other structure in the innermost ring grid 1000, and the airflow is rectified only by the first straightening bars 2000, thereby further reducing the airflow resistance.

[0053] Combine Figure 3 and Figure 5As shown, in some embodiments of the present application, multiple first straightening bars 2000 are evenly distributed along the circumference of the guide fence 100. It can be understood that since the first straightening bars 2000 extend along the radial direction of the guide fence 100 and are distributed along the circumference of the guide fence 100 around the center 110 of the guide fence 100, the multiple first straightening bars 2000 are evenly distributed along the circumference of the guide fence 100, that is, along the circumference of the guide fence 100, the angle between any two adjacent first straightening bars 2000 is the same. Through the uniform distribution of the multiple first straightening bars 2000, the non-uniformity of the airflow is reduced when the airflow flows through the innermost ring fence 100, thereby reducing the impact of the non-uniform airflow on the wind wheel 210 of the fan, thereby further reducing the noise of the fan.

[0054] Continue to combine Figure 3 and Figure 5 As shown, in some embodiments of the present application, multiple second straightening bars 3000 are evenly distributed along the circumference of the guide fence 100. It can be understood that since the second straightening bars 3000 are arranged outside the innermost ring fence 1000 and extend along the radial direction of the guide fence 100, and are distributed along the circumference of the guide fence 100 around the center 110 of the guide fence 100, the extension lines of the second straightening bars 3000 intersect at the center 110 of the guide fence 100. The uniform distribution of the multiple second straightening bars 3000 along the circumference of the guide fence 100 should be understood as the angle between any two adjacent second straightening bars 3000 along the circumference of the guide fence 100 is the same. Through the uniform distribution of the multiple second straightening bars 3000, the non-uniformity of the airflow is reduced when the airflow flows through the innermost ring fence 100, thereby reducing the impact of the non-uniform airflow on the wind wheel 210 of the fan, thereby further reducing the noise of the fan.

[0055] In addition to the first straightening strips 2000 and the second straightening strips 3000 being evenly distributed, the ring grid 1000 also has a straightening effect on the airflow, so the ring grid 1000 also needs to be evenly distributed. Figure 3 and Figure 5 As shown, multiple ring grids 1000 are evenly distributed along the radial direction of the river guide grid 100. For example, multiple ring grids 1000 are designed to be coaxially arranged. Along the radial direction of the guide grid 100, the distance between any adjacent ring grids 1000 is equal. In this way, in conjunction with the second straightening strip 3000, the unevenness of the airflow can be further reduced, thereby reducing the impact of the uneven airflow on the wind turbine wheel 210.

[0056] Combine Figure 3 、 Figure 5 and Figure 6As shown, in some embodiments of the present application, the windward side 2100 of the first straightening bar 2000 is designed to be concave, while the windward side 3100 of the second straightening bar 3000 is designed to be convex. Under the premise of ensuring the noise reduction effect, the axial size of the guide fence 100 can be reduced, thereby reducing the space occupied.

[0057] Specifically, the guide fence 100 is arranged in the wind inlet direction of the fan. Along the axial direction of the guide fence 100, the structure in which the guide fence 100 is combined with the fan has a certain axial dimension. By designing the windward side 2100 of the first straightening bar 2000 to be concave, the part of the guide fence 100 near its center is concave, which is conducive to reducing the axial dimension of the guide fence 100. In other words, reducing the axial dimension of the structure in which the guide fence 100 is combined with the fan is reduced, which is conducive to reducing the space occupied.

[0058] As can be seen from the above, the unevenness of the airflow flowing through the innermost ring grid 1000 is less than that of the airflow flowing through the outermost ring grid 1000. Therefore, by setting the windward side 2100 of the first straightening bar 2000 to be concave, the noise is basically not aggravated. And by designing the windward side 3100 of the second straightening bar 3000 to be convex, a stronger noise reduction effect is ensured for airflow with high unevenness. It can be understood that the so-called windward side (2100 / 3100) is the side facing the airflow, and the leeward side (2200 / 3200) is the side facing away from the airflow.

[0059] Based on the design of the windward side 2100 of the first straightening strip 2000 as concave, Figure 6 and Figure 7 As shown, the thickness of the first straightening bar 2000 along the axial direction of the guide fence 100 can be designed to gradually increase or decrease in a direction approaching the center 110 of the guide fence 100. The thickness of the first straightening bar 2000 along the axial direction of the guide fence 100 is the distance between the windward side 2100 of the first straightening bar 2000 and the leeward side 2200 of the first straightening bar 2000 along the axial direction of the guide fence 100. In this embodiment, the thickness of the first straightening bar 2000 along the axial direction of the guide fence 100 is gradually increased in the direction close to the center 110 of the guide fence 100. In this way, the thickness of the portion of the first straightening bar 2000 close to the center 110 of the guide fence 100 along the axial direction of the guide fence 100 is greater. When the airflow flows through the innermost ring fence 1000, the airflow near the center of the guide fence 100 is stronger. By making the thickness of the portion of the first straightening bar 2000 close to the center 110 of the guide fence 100 greater along the axial direction of the guide fence 100, the straightening effect of the airflow can be enhanced.

[0060] Based on the design of the windward side 3100 of the second straightening strip 3000 as convex, combined with Figure 6 and Figure 7 As shown, the thickness of the second straightening bar 3000 along the axial direction of the guide fence 100 is designed to be uniform. Since the second straightening bar 3000 needs to connect multiple ring fences 1000, this configuration can strengthen the structural strength between the second straightening bar 3000 and the ring fence 1000, thereby strengthening the structural strength of the guide fence 100 and reducing the manufacturing difficulty. In addition, by designing the thickness of the second straightening bar 3000 to be uniform, it is also beneficial to achieve a uniform straightening effect. The thickness of the second straightening bar 3000 along the axial direction of the guide fence 100 is the distance between the windward side 3100 of the second straightening bar 3000 and the leeward side 3200 of the second straightening bar 3000 along the axial direction of the guide fence 100.

[0061] Combine Figure 6 As shown, in some embodiments of the present application, a first plane 4100 is defined. The first plane 4100 moves from the downstream of the guide fence 100 and along the axial direction of the guide fence 100 until the first plane 4100 contacts the guide fence 100. The distance between the first plane 4100 and the windward side 1100 of the innermost ring fence 1000 along the axial direction of the guide fence 100 is H1, and H1 is the maximum dimension of the guide fence 100 along its (the guide fence 100) axial direction.

[0062] Specifically, the distance between the first plane 4100 and the windward side 1100 of the innermost ring grid 1000 is measured along the axial direction of the guide grid 100, and the distance is H1. H1 is the maximum dimension of the guide grid 100 along its axial direction. Since the first straightening bar 2000 is arranged inside the innermost ring grid 1000 and intersects with the innermost ring grid 1000, and the second straightening bar 3000 is arranged outside the innermost ring grid 1000 and intersects with the innermost ring grid 1000, that is, the windward side 2100 of the first straightening bar 2000 is concave from the innermost ring grid 100, and the windward side 3100 of the second straightening bar 3000 is convex from the innermost ring grid 100. This ensures that the axial dimension of the guide grid 100 is minimized and prevents the guide grid 100 from occupying too much space.

[0063] Continue to combine Figure 6As shown, in some embodiments of the present application, a second plane 4200 is defined. The second plane 4200 moves from the downstream of the guide gate 100 and along the axial direction of the guide gate 100 toward the guide gate 100 until the second plane 4200 contacts the second straightening bar 3000. The second plane 4200 and the first plane 4100 can be the same plane or different planes. The minimum distance between the second plane 4200 and the first straightening bar 2000 along the axial direction of the guide gate 100 is H2, and H2 is not less than 0 mm. Through such a configuration, the increase in cost caused by the increase in the length of the first straightening bar 2000 can be avoided, and the increase in the length of the first straightening bar 2000 will not significantly improve the straightening effect. In particular, after a large number of experiments, the inventors limited the range of H2 to 0.4*H1 to 0.75*H1, for example, H2 is 0.4*H1, 0.5*H1, 0.6*H1, 0.7*H1 or 0.75*H1. Through such a design, both rectification effect and cost are taken into account.

[0064] right Figure 3 The guide grid and Figure 9 The guide grid shown was tested for performance, where Figure 3 The number of the first straightening bars 2000 in the illustrated embodiment is 6, and the number of the second straightening bars 3000 is 60. Figure 9 The shown solution does not have the first rectifying bars 1000, and the number of the second rectifying bars 2000 is 60. The efficiency is tested according to "GB / T 1236-2017 Standardized Air Duct Performance Test for Industrial Ventilators", and the noise is tested according to "Noise Limits for Household and Similar Electrical Appliances (GB 19606-2004)". The results are shown in the table below. It can be seen that by coordinating the number of first rectifying bars 1000 and second rectifying bars 2000, the efficiency can be effectively improved and the noise can be reduced.

[0065] plan efficiency Reduction in overall noise OA value Figure 3 The scheme shown 62.1％ 5.2 Figure 9 The scheme shown 61.9％ 4.8

[0066] The second aspect of the present application discloses a fan assembly 200, Figure 1 and Figure 2As shown, the fan assembly 200 includes the above-mentioned guide fence 100 and a fan (not shown in the figure), the guide fence 100 is arranged in the wind inlet direction of the fan, and the guide fence 100 includes a ring fence 1000, a first straightening bar 2000 and a second straightening bar 3000; the ring fence 1000 surrounds the center 110 of the guide fence 100, and the plurality of ring fences 1000 are arranged at intervals along the radial direction of the guide fence 100; the first straightening bar 2000 is arranged in the innermost ring fence 1000, and the first straightening bar 2000 is extended along the radial direction of the guide fence 100. The plurality of first straightening bars 2000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the second straightening bars 3000 are arranged outside the innermost ring fence 1000, and the second straightening bars 3000 are extended along the radial direction of the guide fence 100, so as to intersect with the plurality of ring fences 1000, and the plurality of second straightening bars 3000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the number of the first straightening bars 2000 is designed to be no greater than the number of the second straightening bars 3000.

[0067] The coordination of the ring fence 1000, the first straightening bars 2000, and the second straightening bars 3000 achieves airflow rectification. Furthermore, by optimizing the number of first straightening bars 2000 and second straightening bars 3000 inside and outside the innermost ring fence 1000, the flow resistance of the guide fence 100 can be reduced at high flow rates while effectively reducing noise, thereby minimizing the deterioration of the fan's efficiency and ensuring fan efficiency. It is understood that the guide fence 100 of the fan assembly 200 of this embodiment adopts the technical solutions of the above-mentioned embodiments, and therefore at least has the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0068] The third aspect of the present application discloses an air treatment device 300, Figure 1 and Figure 2As shown, the air handling device 300 includes the above-mentioned fan assembly 200 and a cabinet 310. The fan assembly 200 includes the above-mentioned guide grid 100 and a fan. The guide grid 100 is arranged in the air inlet direction of the fan. The fan assembly 200 is arranged in the cabinet 310. The guide grid 100 includes a ring grid 1000, a first straightening bar 2000 and a second straightening bar 3000. The ring grid 1000 surrounds the center 110 of the guide grid 100, and multiple ring grids 1000 are arranged at intervals along the radial direction of the guide grid 100. The first straightening bar 2000 is arranged in the innermost ring grid 1000, and the first straightening bar 2000 is arranged in the innermost ring grid 1000. The flow bars 2000 are arranged along the radial extension of the guide fence 100, and a plurality of first flow bars 2000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the second flow bars 3000 are arranged outside the innermost ring fence 1000, and the second flow bars 3000 are arranged along the radial extension of the guide fence 100, so as to intersect with the plurality of ring fences 1000, and a plurality of second flow bars 3000 are arranged around the center 110 of the guide fence 100 and along the circumference of the guide fence 100; the number of the first flow bars 2000 is designed to be no greater than the number of the second flow bars 3000. The cabinet 310 is equivalent to forming an air duct, and the fan assembly 200 is installed in the cabinet 310, so as to drive the airflow to flow through the cabinet 310 and be transported out. Figure 1 In the orientation shown, the fan of the fan assembly 200 generates negative pressure, thereby drawing air. The air flows from bottom to top through the fan assembly 200 and flows along the cabinet 310 to be transported out.

[0069] It can be understood that the fan assembly 200 of the air treatment device 300 of this embodiment adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0070] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings, or direct / indirect application in other related technical fields, are included in the patent protection scope of the present application.

Claims

1. A guide fence (100), characterized in that: The guide fence (100) comprises: a ring grid (1000) surrounding the center (110) of the guide grid (100), wherein a plurality of the ring grids (1000) are distributed at intervals along the radial direction of the guide grid (100); a first rectifying bar (2000) disposed in the innermost ring grid (1000), the first rectifying bar (2000) extending in the radial direction of the guide grid (100), and a plurality of the first rectifying bars (2000) distributed around the center (110) of the guide grid (100) along the circumference of the guide grid (100); and a second rectifying bar (3000) provided outside the innermost ring grid (1000), the second rectifying bar (3000) extending in the radial direction of the guide grid (100) and intersecting with a plurality of the ring grids (1000), the plurality of the second rectifying bars (3000) being distributed around the center (110) of the guide grid (100) and along the circumference of the guide grid (100); Wherein, the number of the first rectifying bars (2000) is not greater than the number of the second rectifying bars (3000).

2. The guide fence (100) according to claim 1, characterized in that: The number of the second rectifying bars (3000) is 1 to 30 times the number of the first rectifying bars (2000).

3. The guide fence (100) according to claim 2, characterized in that: The number of the second rectifying bars (3000) is 2 to 15 times the number of the first rectifying bars (2000).

4. The guide fence (100) according to claim 1, characterized in that: One end of the plurality of first rectifying bars (2000) intersects with the center (110) of the guide grid (100), and the other end intersects with the innermost ring grid (1000).

5. The guide fence (100) according to claim 1, characterized in that: A plurality of the first rectifying strips (2000) are evenly distributed along the circumference of the guide fence (100); and / or, a plurality of the second rectifying strips (3000) are evenly distributed along the circumference of the guide grid (100); And / or, the plurality of ring gates (1000) are evenly distributed along the radial direction of the guide gate (100).

6. The guide fence (100) according to claim 1, characterized in that: The windward side (2100) of the first straightening strip (2000) is concavely arranged, and the windward side (3100) of the second straightening strip (3000) is convexly arranged.

7. The guide fence (100) according to claim 6, characterized in that: In a direction approaching the center (110) of the guide fence (100), the thickness of the first rectifying bar (2000) along the axial direction of the guide fence (100) gradually increases.

8. The guide fence (100) according to claim 6, characterized in that: The thickness of the second rectifying strip (3000) along the axial direction of the guide fence (100) remains constant.

9. The guide fence (100) according to claim 6, characterized in that: A first plane (4100) is defined. The first plane (4100) is located downstream of the guide fence (100) and moves toward the guide fence (100) along the axial direction of the guide fence (100) until it contacts the guide fence (100). A distance H1 between the windward side (1100) of the innermost ring fence (1000) and the first plane (4100) along the axial direction of the guide fence (100) is the maximum dimension of the guide fence (100) along its axial direction.

10. The guide fence (100) according to claim 9, characterized in that: A second plane (4200) is defined, wherein the second plane (4200) moves toward the guide fence (100) along the axial direction of the guide fence (100) downstream of the guide fence (100) until it contacts the second straightening bar (3000), and a minimum distance H2 between the first straightening bar (2000) and the second plane (4200) along the axial direction of the guide fence (100) is not less than 0 mm.

11. The guide fence (100) according to claim 10, characterized in that: Satisfy H2=0.4*H1~0.75*H1.

12. A fan assembly (200), characterized in that: It comprises a fan and a guide fence (100) according to any one of claims 1 to 11, wherein the guide fence (100) is arranged in the air inlet direction of the fan.

13. An air treatment device (300), characterized in that: It comprises a cabinet (310) and the fan assembly (200) according to claim 12, wherein the fan assembly (200) is arranged in the cabinet (310).

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