Air inlet grille, fresh air module and air conditioner

Abstract

The present disclosure relates to an air inlet grille, a fresh air module and an air conditioner. The air inlet grille is used for airflow passing through. The air inlet grille has an air inlet side arranged on an upstream side in an airflow passing direction. A side surface close to the air inlet side is provided with a concave on a downstream side of the airflow passing direction. The concave curved surface can form a folding and guiding effect on the airflow. On the one hand, the curved surface radius can converge the airflow dispersed at the edge to the center of the air inlet hole, avoiding unnecessary diffusion of the airflow. On the other hand, for the airflow that may form a backflow, the concave curved surface can guide the airflow to the air inlet hole through the curved surface, optimize the airflow flow field distribution, reduce the airflow loss and improve the effective flow capacity.

Description

Technical Field

[0001] This disclosure relates to the field of air conditioning equipment technology, and in particular to an air inlet grille, a fresh air module and an air conditioner. Background Technology

[0002] With the popularization of fresh air systems, the air intake efficiency of the fan directly determines its air circulation capacity, and the structure of the air intake grille, as the airflow channel of the fan, directly affects the air intake resistance and the air volume.

[0003] In related technologies, air intake grilles often adopt a structure design of a planar base plate with staggered grid bars. The grid bars are evenly staggered along the horizontal, vertical or diagonal lines to form regular air intake holes. When the air intake air comes into contact with the air intake side of the air intake grille, this type of design is limited by its structural characteristics, and its air intake capacity has a significant shortcoming, resulting in insufficient air intake volume.

[0004] In view of the above, this application is hereby submitted. Utility Model Content

[0005] To overcome the problems existing in the related technologies, this disclosure provides an air intake grille, a fresh air module, and an air conditioner.

[0006] According to a first aspect of the present disclosure, an air inlet grille is provided for airflow to pass through. The air inlet grille has an air inlet side disposed on the upstream side of the airflow direction, and the surface of the air inlet grille near the air inlet side is provided with a recess on the downstream side facing the airflow direction.

[0007] According to the air inlet grille of this embodiment, the concave curved surface can gather and guide the airflow. On the one hand, the curvature of the curved surface can gather the dispersed airflow at the edge towards the center of the air inlet, avoiding the need for airflow diffusion. On the other hand, for airflow that might otherwise form a backflow, the concave curved surface can guide the airflow to concentrate towards the air inlet through the curved surface, optimize the airflow field distribution, reduce airflow loss, and increase the effective flow rate.

[0008] In some embodiments, the air intake grille includes a plurality of air intake holes.

[0009] In some embodiments, the inner wall surface of the air inlet is formed with multiple edges, which are evenly distributed along the circumference of the air inlet, and the distance between two adjacent edges is equal.

[0010] In some embodiments, the air inlet is configured as a regular hexagonal structure, with the six inner wall surfaces of the regular hexagonal structure intersecting in pairs.

[0011] In some embodiments, at least two air inlets have different effective flow areas, where the effective flow area is the net area enclosed by the inner wall of the air inlet that allows airflow to pass through.

[0012] In some embodiments, the inner wall surface of the air inlet is inclined toward the edge of the air inlet grille from the upstream side to the downstream side of the airflow direction.

[0013] In some embodiments, the inner wall surface of the air inlet is inclined toward the center of the air inlet grille from the upstream side to the downstream side of the airflow direction.

[0014] In some embodiments, the air intake grille further includes an air outlet side disposed opposite to the air intake side, wherein the surface of the air intake grille near the air outlet side is configured to be recessed inward toward the upstream side facing the airflow direction.

[0015] In some embodiments, the air inlet grille further includes an air outlet side disposed opposite to the air inlet side, and the air outlet side is provided with a groove.

[0016] In some embodiments, the air inlet grille also includes an air outlet side disposed opposite to the air inlet side, wherein the surface of the air inlet grille near the air outlet side is configured as a plane or convex outward toward the downstream side in the direction of airflow.

[0017] In some embodiments, the air intake grille includes a plurality of grille bars, the surfaces of which are joined together to form an inwardly concave arc surface facing the downstream side of the airflow square.

[0018] In some embodiments, the thickness of each grid bar is different along the airflow direction so that the surface of the grid bar near the air inlet side is spliced ​​together to form an arc surface.

[0019] In some embodiments, the extending directions of adjacent grilles form an angle so that the surfaces of the grilles closest to the air inlet side are joined together to form an arc surface.

[0020] In some embodiments, the cross-section of the grille is concave arc-shaped, and the surface of the grille near the air inlet side is an arc segment, the radius of curvature R1 of the arc segment is equal to the radius of curvature R2 of the overall arc surface of the air inlet grille near the air inlet side.

[0021] According to a second aspect of the present disclosure, a fresh air module is provided, including a volute, a fan wheel, and an air inlet grille as described in the first aspect. An air inlet is formed on the volute, the fan wheel is disposed inside the volute, and the air inlet grille is disposed at the air inlet.

[0022] In some embodiments, the air inlet is located on one side of the impeller along its own axial direction.

[0023] In some embodiments, the wind turbine includes a motor and an impeller. The motor drives the impeller to rotate. The surface of the air inlet grille near the air outlet side is recessed towards the upstream side of the airflow direction. There is a gap between the surface of the air inlet grille near the air outlet side and the wind turbine. Part of the motor structure is placed within the gap.

[0024] In some embodiments, the wind turbine includes an impeller and a motor, the motor drives the impeller to rotate, and the air inlet grille has an air inlet side and an air outlet side arranged opposite to each other along the airflow direction. The air outlet side is provided with a groove, which is configured to avoid a portion of the motor structure.

[0025] According to the fresh air module in this embodiment, by setting the first aspect of the air intake grille, the capture efficiency of the dispersed fresh air flow can be improved, and the air intake volume of the fresh air module can be increased.

[0026] According to a third aspect of the present disclosure, an air conditioner is provided, including the fresh air module proposed in the second aspect.

[0027] In some embodiments, the air conditioner includes an indoor unit fan and an evaporator, and along the length of the air conditioner, a fresh air module is disposed on one side of the indoor unit fan and / or the evaporator.

[0028] In some embodiments, the axial direction of the air intake grille is aligned with the longitudinal direction of the air conditioner.

[0029] According to this embodiment, by providing the fresh air module proposed in the second aspect, the fresh air volume of the air conditioner can be increased, thereby improving the air exchange efficiency of the air conditioner.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0032] Figure 1 This is a cross-sectional view of the air intake grille shown according to some embodiments of the present disclosure;

[0033] Figure 2 This is a schematic diagram of the structure of the air intake grille shown according to some embodiments of the present disclosure;

[0034] Figure 3 This is an exploded view of a fresh air module according to some embodiments of the present disclosure;

[0035] Figure 4 This is a partial exploded view of a fresh air module according to some embodiments of this disclosure;

[0036] Figure 5 This is a partial structural schematic diagram of an air conditioner according to some embodiments of the present disclosure.

[0037] The attached figures are labeled as follows:

[0038] 10-Fresh air module; 11-Housing shell; 12-Vortex; 121-Air inlet; 13-Impeller;

[0039] 14-Fresh air inlet; 15-Fresh air outlet; 20-Air inlet grille; 131-Motor; 132-Impeller;

[0040] 24-Air inlet side; 25-Air outlet side; 23-Air inlet hole; 251-Groove. Detailed Implementation

[0041] Some embodiments of this disclosure will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements.

[0042] In related technologies, air conditioning equipment includes a fresh air module, which is used to introduce outdoor air into the room. The fresh air module includes a fresh air fan, which has an air inlet and an air inlet grille set in the cavity.

[0043] Air intake grilles generally adopt a structure design of a flat base plate and staggered grid bars. The base plate is a flat plate structure, and the grid bars are evenly staggered in the horizontal, vertical or diagonal direction. Regularly shaped air intake holes are formed between the grid bars. After the airflow comes into contact with the flat surface, it cannot smoothly transition to the air intake hole. Some airflow bounces due to the impact, thus forming a backflow vortex, which not only prevents the airflow from efficiently entering the air intake hole.

[0044] To address the technical problem of insufficient air intake volume in traditional fresh air modules, this application provides an air intake grille, a fresh air module, and an air conditioner.

[0045] The air intake grille has an inwardly recessed side facing downstream of the airflow direction. The concave curved surface can gather and guide the airflow. On the one hand, the curvature of the surface can converge the dispersed airflow at the edge to the center of the air intake hole, avoiding unnecessary airflow diffusion. On the other hand, for airflow that might otherwise form a backflow, the concave curved surface can guide the airflow to concentrate in the air intake hole through the arc surface, optimizing the airflow field distribution, reducing airflow loss, and increasing effective flow rate.

[0046] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0047] To better understand this application, the following is combined with... Figures 1 to 5 The technical solution of this application is described in detail below:

[0048] This application provides an air intake grille 20. (Refer to...) Figure 1 As shown, the air inlet grille 20 is used for airflow. The air inlet grille 20 has an air inlet side 24 disposed on the upstream side of the airflow direction. The surface of the air inlet grille 20 near the air inlet side 24 is provided with a recess on the downstream side facing the airflow direction.

[0049] It should be noted that the airflow direction is Figure 1 The direction indicated by the dashed arrow in the diagram is shown. This is for illustrative purposes only; the airflow direction may also be from the radial direction of the air intake grille 20 to... Figure 1 The air intake side is located in the center and passes through the air intake grille. This does not affect the settings for the air intake side 24.

[0050] The concave surface forms a cavity, which can guide the oblique airflow to the center of the cavity, expand the airflow capture range, and realize multi-angle airflow collection.

[0051] The air intake side 24 of the air intake grille 20 is set to be concave in the downstream direction of the airflow. By setting the concave structure, an arc-shaped directional airflow channel is constructed. After the airflow comes into contact with the air intake grille 20, it can smoothly transition to the center along the concave surface, avoiding the stagnation phenomenon caused by the vertical impact of the airflow.

[0052] The concave curved surface of the air inlet side 24 can gather and guide the airflow. On the one hand, the curvature of the surface can bring the dispersed airflow collected at the edge to the center of the air inlet grille 20 along the tangent direction of the concave curved surface, and then enter the downstream air inlet hole in a stable vertical direction, so as to avoid the airflow from spreading disorderly or accumulating locally on the surface of the air inlet grille 20.

[0053] On the other hand, for airflows that might otherwise form backflow, the concave curved surface can guide the airflow to concentrate towards the air inlet through the arc surface, optimize the airflow field distribution, reduce airflow loss, and increase effective flow rate.

[0054] Meanwhile, the concave surface increases the airflow contact area. Compared to a flat grille, the actual airflow contact area of ​​the concave surface is increased for the same projected area, allowing more airflow to enter the air inlet and effectively increasing air volume. The converging effect of the concave surface can cause this part of the backflow airflow to enter the air inlet along the surface, transforming it into effective intake airflow and reducing airflow waste.

[0055] By setting the air intake side 24 of the air intake grille 20 as a downward concave arc structure, when the airflow comes into contact with the air intake grille 20, the airflow will naturally turn along the curved surface, so that the airflow slides along the wall of the air intake grille 20, reducing the large amount of kinetic energy consumed by the impact.

[0056] As airflow slides along the curved wall, the concave surface guides the dispersed airflow at the edges to converge towards the air inlet. This reduces the impact intensity between the airflow and the air inlet grille 20, thereby reducing the surface vibration amplitude of the air inlet grille 20 and consequently lowering the noise level. Compared to a traditional flat surface, the concave structure improves the directionality of the airflow entering the air inlet, eliminating the need for frequent speed adjustments by the downstream rotor to adapt to airflow fluctuations and enhancing the rotor's operational stability.

[0057] The airflow gathered in the concave cavity forms a stable airflow layer at the bottom of the cavity, and then is evenly distributed downstream through the air inlet holes. This avoids the situation where some air inlets are not airflowing or some are overloaded due to the dispersion of airflow in traditional flat grilles, and reduces the flow difference between the air inlets.

[0058] The concave structure prevents the airflow from gradually cutting into the cavity, changing the impact direction from vertical to tangential. This reduces impact pressure and impact loss. According to fluid mechanics formulas, impact loss is positively correlated with impact pressure; reducing loss directly lowers the total resistance of the airflow through the inlet grille 20. When the impact pressure decreases, the impact noise also decreases.

[0059] When low-resistance airflow enters the downstream wind turbine, the turbine does not need to overcome the negative pressure load caused by high resistance, thus reducing the turbine's energy consumption, minimizing turbine bearing wear, and extending the turbine's lifespan.

[0060] The smooth walls of the concave cavity allow the airflow to flow along the walls throughout the entire process, with no obvious separation points. This reduces the area of ​​the vortex region, decreases vortex loss, and reduces vortex noise.

[0061] In one embodiment, the air intake grille 20 includes a plurality of air intake holes 23, the inner wall surfaces of which intersect to form at least one edge. Compared to airflow passing through a circular surface, when airflow passes through an edge surface, a small amount of high-frequency noise is generated due to the impact of the edge. This type of high-frequency noise has a shorter wavelength and is easily absorbed by the air duct and sound insulation cotton inside the air conditioner, thereby achieving the purpose of overall noise reduction.

[0062] By setting the inner wall surface of the air inlet 23 to an angle, a rigid guide for the airflow can be formed. For example, the two inner wall surfaces of the angle can confine the incoming airflow to the plane, preventing the airflow from spreading or deflecting in the air.

[0063] The inner wall of the corner is formed by the intersection of multiple planes. When subjected to collision force or airflow impact force, it will be transmitted to the overall frame of the air intake grille 20 through the corner inflection point, avoiding stress concentration in a certain local area and improving the overall structural strength of the air intake grille 20.

[0064] In one embodiment, reference Figure 2 As shown, the inner wall of the air inlet 23 has multiple edges, which are evenly distributed around the circumference of the air inlet 23, and the distance between two adjacent edges is equal.

[0065] In one embodiment, reference Figure 2 As shown, the air inlet 23 is configured as a regular hexagonal structure. The combination of the various regular hexagonal air inlets 23 can form a honeycomb structure, which can further optimize the airflow distribution, reduce local wind speed differences, and reduce wind noise.

[0066] It is known that the air inlet 23 can also be set as a polygonal hole, for example, a triangular hole, a trapezoidal hole, a square hole or a pentagonal hole, etc.

[0067] In one embodiment, at least two air inlets 23 have different effective flow areas, and the effective flow area is the net area formed by the inner wall surface of the air inlet 23 that allows airflow to pass through.

[0068] By leveraging the differences in the effective flow area of ​​the air inlets 23, the system deeply adapts to the airflow distribution characteristics of the air conditioner. It precisely correlates the effective flow area of ​​the air inlets 23 in different areas with the corresponding airflow velocity, matching small inlet areas with high velocities and large inlet areas with low velocities. This dynamically classifies and guides airflow at different velocities, achieving balanced flow distribution. This avoids the problems of high-velocity airflow impact and turbulence, and slow-moving low-velocity airflow in a single inlet area, while also precisely suppressing noise by reducing various disturbance sources such as airflow impact and eddies.

[0069] In one embodiment, the inner wall surface of the air inlet 23 is inclined toward the edge of the air inlet grille 20 from the upstream side to the downstream side of the airflow direction.

[0070] The inner wall of the air inlet 23 is inclined toward the edge of the air inlet grille 20, which can direct the dispersed airflow collected by the concave structure to the edge of the air inlet grille 20, realizing the transformation of airflow from convergence to uniform dispersion.

[0071] The inner wall surface, which is inclined toward the edge of the air inlet grille 20, causes the airflow of each air inlet hole 23 to flow along an outward inclined path, reducing the accumulation of airflow toward the center. The airflow velocity in the central area is reduced, and the congestion problem in the middle area of ​​the air inlet grille 20 is solved.

[0072] In some implementations, the inner wall surfaces of different air inlets 23 have different inclination angles to guide airflow at different angles. For example, the air inlets 23 in the central area can be tilted at a larger angle, while the air inlets 23 in the edge areas can be tilted at a smaller angle, thereby achieving differentiated wind speed distribution and adapting to the differentiated needs of multiple areas.

[0073] The aforementioned inclined inner wall surface can shorten the axial length of the air inlet 23, making the air inlet grille 20 thinner and adapting to the design trend of thinner air conditioners.

[0074] In one embodiment, the inner wall surface of the air inlet 23 is inclined toward the center of the air inlet grille 20 from the upstream side to the downstream side of the airflow direction.

[0075] By tilting the inner wall of the air inlet 23 towards the center and combining it with the concave structure to macroscopically gather the dispersed airflow from multiple directions, the macroscopically gathered airflow can be microscopically directed to the center of the air inlet grille 20, thus solving the problem that the gathered airflow may still be dispersed in the concave structure.

[0076] The inclined inner wall towards the center allows the airflow of each air inlet 23 to flow along a centripetal inclined path, avoiding airflow deviation from the center due to non-centripetal inclined holes and reducing airflow idling losses. The centripetal guidance of the air inlet 23 can reduce the diffusion angle, weaken the radial diffusion of airflow, improve the convergence and directionality of airflow, and enhance the airflow utilization rate in the central area.

[0077] The inclined inner wall of the air inlet 23, through a fixed centripetal angle, controls the airflow direction deviation of each air inlet 23 within a set range, thereby improving the consistency of the airflow injection direction.

[0078] The inner wall of the air inlet 23 is inclined towards the center of the air inlet grille 20, which can shorten the axial length of the air inlet 23, shorten the flow path of the airflow in the air inlet 23, reduce friction loss, and reduce the total resistance of the air inlet grille 20. Under the same impeller power, a larger fresh air volume can be obtained.

[0079] In one embodiment, the air inlet grille 20 further includes an air outlet side 25 disposed opposite to the air inlet side 24, and the surface of the air inlet grille 20 near the air outlet side 25 is configured to be recessed upstream in the direction of airflow. The air outlet side of the air inlet grille 20 may form a gap with the internal structure of the volute 12.

[0080] It should be noted that the interval here refers to the open space formed between the convex surface of the air outlet side 25 of the air inlet grille 20 facing the upstream direction of airflow and the outer surface of the internal structure of the volute 12 (specifically the impeller 13 in this application). This space does not require a recessed structure on the air inlet grille 20, but is formed only by the gap between the convex shape of the air outlet side of the air inlet grille and the outer contour of the impeller.

[0081] In one embodiment, reference Figure 2 As shown, the air inlet grille 20 also includes an air outlet side 25 disposed opposite to the air inlet side 24, and the air outlet side 25 is provided with a groove 251.

[0082] It should be noted that the groove 251 here refers to the inward recess on the surface of the air outlet side 25 of the air inlet grille 20 to form a closed or semi-closed space. This space is specially adapted to the contour of the protruding part of the motor 131 through the structural recess of the air inlet grille 202 itself, so as to achieve targeted avoidance.

[0083] This embodiment utilizes two different mating structures to achieve avoidance between the air inlet grille 20 and the motor 131. The spacer structure requires no additional recess and is simple to manufacture; the groove structure offers better adaptability and more precise avoidance. Both structures effectively prevent interference between the motor 131 and the air inlet grille 20, while reducing the overall thickness of the fresh air module, thus meeting the design requirements for miniaturization of the air conditioner.

[0084] In this embodiment, the air outlet side 25 can be provided with various types of grooves 251 that are concave on the upstream side facing the airflow direction. Figure 2 In the example, the bottom surface of the groove 251 on the air side 25 is set as a plane.

[0085] It should be noted that the embodiments of this application are not limited to a specific groove shape, as long as it can form a space with the impeller. For example, the bottom of the groove 251 is inclined, or a partially flat portion is inclined.

[0086] By setting the air outlet side 25 to protrude outward towards the upstream side in the direction of airflow, a certain installation area is provided for the installation of the impeller 13, effectively shortening the axial length of the volute 12, making the whole unit of the fresh air module 10 thinner, and adapting to the design trend of thin air conditioners.

[0087] The double outward convex arrangement of the air inlet side 24 and the air outlet side 25, with the air inlet side 24 facing the upstream outward convex arc surface, transforms the vertical impact from upstream into a smooth cut along the tangent direction of the arc surface, avoiding airflow rebound or the formation of local vortices on the surface of the air inlet side 24.

[0088] The air outlet side 25 is designed to bulge outwards towards the upstream, which can directionally constrain the airflow that is about to flow out of the air inlet grille 20, avoid the airflow diffusion that is common on the planar air outlet side 25, and ensure that the airflow is stably discharged in a preset direction and does not diffuse to the surrounding unrelated areas.

[0089] By utilizing the directional constraint of the air outlet side 25, the airflow maintains a stable velocity when it is discharged, and the impeller 13 does not need to consume additional power to compensate for the velocity loss, further reducing energy consumption.

[0090] In one embodiment, the air inlet grille 20 also includes an air outlet side 25 disposed opposite to the air inlet side 24, and the surface of the air inlet grille 20 near the air outlet side 25 is configured to be convex or flat (not shown in the figure) on the downstream side facing the airflow direction.

[0091] The aforementioned design of the air outlet side 25 protruding downstream can guide the airflow to flow quickly to downstream components of the air conditioner (such as the fan), reduce airflow diffusion on the air outlet side 25, and improve airflow delivery efficiency.

[0092] The air outlet side 25 is set in a plane. The plane structure simplifies the grille processing technology, avoids the airflow vortex that may be generated by the convex structure, and the plane air outlet side 25 is easier to fit with the internal air duct, reducing airflow loss.

[0093] In one embodiment, the air intake grille 20 includes a plurality of grille bars, the surfaces of which near the air intake side 24 are joined together to form a concave arc surface on the downstream side facing the airflow direction.

[0094] By using a design where the grilles are spliced ​​together to form a concave arc surface, it is possible to ensure that the airflow direction is consistent throughout the air intake grille 20, avoiding the problem of edge airflow deflection that may occur with a single integral arc surface, and ensuring that the airflow enters the volute 12 at the same angle.

[0095] The grid splicing design allows for flexible adjustment of the curvature of the arc surface. For example, this can be achieved by replacing grids of different lengths to adapt to fresh air modules 10 of different sizes.

[0096] In one embodiment, the thickness of each grid bar is different along the airflow direction so that the side surface of the grid bar closest to the air inlet side 24 is spliced ​​together to form an arc surface.

[0097] The aforementioned method of forming an arc surface by varying the thickness of the grid strips offers the core advantage of optimizing airflow guidance accuracy and local strength. On one hand, the accuracy of the arc surface is improved; by adjusting the thickness of the grid strips, a more precise concave arc surface can be formed, ensuring that the airflow flows along the designed path and avoiding local eddies caused by inaccurate arc surfaces, thereby reducing overall noise.

[0098] On the other hand, by increasing the thickness of the grid in the high wind speed area, the resistance to airflow impact is stronger, which can resist the strong suction airflow when the impeller 13 of the fresh air module 10 rotates at high speed, and prevent the air intake grille 20 from deforming.

[0099] Finally, the thickness difference creates differentiated support for the grid strips in different wind speed regions. When the wind speed is switched, the grid strips always maintain structural stability and the air intake path remains unchanged, ensuring a stable fresh air volume.

[0100] In one embodiment, the extending directions of adjacent grilles form an angle so that the surfaces of the grilles closest to the air inlet side 24 are joined together to form an arc surface.

[0101] In this embodiment, by forming an angle between adjacent grid bars and splicing one side of the grid bars to form an arc surface, the grid bars can adapt to the incoming flow from different directions through the angle setting, and the range of air intake angle is expanded, so that the fresh air module 10 can still maintain stable air intake under complex wind conditions.

[0102] The included angle between adjacent grilles forms a triangular support structure, and the overall bending resistance of the air intake grille 20 is improved compared with that of the parallel grille, which can resist the compression deformation during transportation.

[0103] The angle formed between different grid bars can rectify the turbulent incoming flow in multiple directions, making the airflow entering the volute 12 smoother, reducing the wind noise generated by the airflow impacting the impeller 13, and reducing aerodynamic noise.

[0104] In one embodiment, the cross-section of the grille is concave arc-shaped, and the surface of the grille near the air inlet side 24 is an arc segment. The radius of curvature R1 of the arc segment is equal to the radius of curvature R2 of the overall arc surface of the air inlet grille 20.

[0105] In the above, the curvature of the arc segment of the grille is consistent with that of the overall arc surface, achieving dual optimization of airflow and structure of the fresh air module 10. On the one hand, the consistent curvature ensures that the airflow on the surface of the grille and the overall surface of the air inlet grille 20 is not abrupt, avoiding airflow separation caused by curvature differences. The resistance encountered by the airflow through the air inlet grille 20 is reduced, and the power consumption of the impeller 13 of the fresh air module 10 is reduced.

[0106] On the other hand, the uniform curvature makes the stress distribution of the grille and the overall frame of the air intake grille 20 more uniform. When the air intake grille 20 is subjected to external impact, there is no situation where the grille breaks due to local stress concentration.

[0107] Finally, the uniform curvature of the arc-shaped grille makes the appearance of the air intake grille 20 more regular, while the arc-shaped surface is free of sharp corners that accumulate dust, reducing the frequency of cleaning by users and ensuring the long-term air intake efficiency of the fresh air module 10.

[0108] Reference Figure 3 , Figure 4 As shown, the fresh air module 10 proposed in this application embodiment includes a volute 12, a fan wheel 13 and the aforementioned air inlet grille 20. An air inlet 121 is formed on the volute 12, the fan wheel 13 is disposed inside the volute 12, and the air inlet grille 20 is disposed at the air inlet 121.

[0109] According to the fresh air module 10 in this embodiment, by setting the above-mentioned air intake grille, the capture efficiency of dispersed fresh air flow can be improved, and the air intake volume of the fresh air module can be increased.

[0110] Reference Figure 3 As shown, the fresh air module 10 also includes a housing 11, which forms a receiving cavity, and a fresh air inlet 14 and a fresh air outlet 15 communicating with the receiving cavity. The volute 12 is placed in the receiving cavity. After the airflow enters the receiving cavity through the fresh air inlet 14, it enters through the air inlet 121 of the impeller 13 and flows out through the fresh air outlet 15.

[0111] Reference Figure 3 As shown, the housing 11 is a split type, and the fresh air inlet 14 is formed by combining the housing 11.

[0112] In one embodiment, the air inlet 121 is located on one side of the impeller 13 along its own axial direction. This optimizes the airflow path, and the axial air intake allows for more precise contact between the airflow and the impeller 132 of the impeller 13, improving the working efficiency of the impeller 13. Under the same motor power, the fresh air volume of the fresh air module 10 is increased.

[0113] Furthermore, axial air intake reduces friction between the airflow and the interior of the volute 12, and the airflow flows axially without radial deflection, avoiding high-frequency whistling caused by the airflow impacting the edge of the impeller 13, thus reducing the overall operating noise of the fresh air module 10.

[0114] In one embodiment, the surface of the air inlet grille 20 near the air outlet side 25 is recessed towards the upstream side of the airflow direction, and there is a gap between the surface of the air inlet grille 20 near the air outlet side 25 and the impeller 13.

[0115] By having the outlet side 25 protrude upwards towards the upstream side, a gap is left between the outlet side 25 and the impeller 13, which can improve the smoothness of airflow in the fresh air module 10 and reduce noise. The upward protrusion of the outlet side 25 can reverse the airflow from the inlet grille 20 to the inlet end of the impeller 13, avoiding direct airflow diffusion. This improves the efficiency of airflow convergence towards the impeller 13. Furthermore, the guiding structure of the outlet side 25 reduces the impact of airflow on the inlet end of the impeller 13, reduces the turbulence of the impeller 13 through the segment, and reduces the vibration of the impeller 13 caused by turbulence.

[0116] The presence of the gap forms an air buffer layer, which can reduce the efficiency of the air intake grille 20 in transmitting to the impeller 13 due to the impact of airflow. At the same time, it reduces the direct transmission of vibration of the impeller 13 during operation to the air intake grille 20, reduces the resonance noise of the air intake grille 20 and the impeller 13, and further reduces the overall noise of the fresh air module 10.

[0117] The gap between the air intake grille 20 and the impeller 13 can also prevent the air intake grille 20 from directly contacting the impeller 13 due to accidental deformation, avoid scratching and damage to the impeller 13, and at the same time reserve maintenance space.

[0118] In one embodiment, the wind turbine 13 includes a motor 131 and an impeller 132, with a portion of the motor 131 disposed within a gap.

[0119] By setting the air outlet side 25 to be recessed inward toward the upstream side facing the airflow direction, a certain installation area is provided for the installation of the impeller 13, effectively shortening the axial length of the volute 12, making the whole unit of the fresh air module 10 thinner, and adapting to the design trend of thin air conditioners.

[0120] In one embodiment, the air intake grille 20 has an air intake side 24 and an air outlet side 25 disposed opposite to each other along the airflow direction. The air outlet side 25 is provided with a groove 251, which is configured to partially avoid the structure of the motor 131.

[0121] The definitions of the interval and groove 251 in this embodiment are the same as those in the above embodiments, and will not be repeated here.

[0122] The technical advantages of the fresh air module 10 in this embodiment are the same as those of the air intake grille 20 in the above embodiment, and will not be repeated here.

[0123] An air conditioner is proposed in the embodiments of this application, with reference to... Figure 5 As shown, the air conditioner includes the aforementioned fresh air module 10.

[0124] By incorporating the aforementioned fresh air module, this air conditioner can increase its fresh air volume and improve its ventilation efficiency.

[0125] Specifically, the air conditioner includes split-type units or integrated units. When the air conditioner is set as a split-type unit, it includes an indoor unit and an outdoor unit. The fresh air module 10 can be installed in the indoor unit or the outdoor unit to guide outside air into the room.

[0126] In one embodiment, the air conditioner includes an indoor unit fan and an evaporator, and along the length of the air conditioner, a fresh air module 10 is disposed on one side of the indoor unit fan and / or the evaporator.

[0127] The above structure improves the practicality and compatibility of the fresh air module 10 without affecting the heat exchange capacity of the air conditioner's core. Firstly, the air conditioner has more redundant space along its length; placing the fresh air module 10 on one side avoids occupying space in the thickness or height directions. Secondly, with the fresh air module 10 located on one side of the indoor unit's fan or evaporator, the fresh air, after being processed by the module, smoothly flows into the mixing chamber along its length. This improves the stability of the heat exchange airflow in the evaporator, avoids direct impact on the core heat exchanger, and reduces noise generated by airflow impacting the evaporator.

[0128] In one embodiment, the axial direction of the air intake grille 20 is aligned with the length direction of the air conditioner. It should be noted that... Figure 1 The X-axis represents the length of the air conditioner. The Y-axis represents the thickness of the air conditioner, and the Z-axis represents the height of the air conditioner.

[0129] By axially aligning the air intake grille 20 along the length of the air conditioner, the air intake grille 20 can extend along the height of the air conditioner, and the air intake holes 23 can be evenly distributed along the length, resulting in a larger air intake area compared to the traditional radial (perpendicular to the length) configuration. Under the same fan power, the fresh air volume of the fresh air module 10 is increased.

[0130] The technical advantages of the air conditioner in this embodiment are the same as those of the air intake grille 20 or the fresh air module 10 in the above embodiments, and will not be repeated here.

[0131] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0132] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An air intake grille for airflow to pass through, characterized in that, The air intake grille has an air intake side (24) located upstream of the airflow direction, and the surface of the air intake grille near the air intake side (24) is provided with a downstream side recess facing the airflow direction.

2. The air intake grille according to claim 1, characterized in that, The air intake grille includes a plurality of air intake holes (23), the inner wall surfaces of which intersect to form at least one edge.

3. The air intake grille according to claim 2, characterized in that, The inner wall of the air inlet (23) has multiple edges, which are evenly distributed around the air inlet (23) and the distance between two adjacent edges is equal.

4. The air intake grille according to claim 2, characterized in that, The air inlet (23) is configured as a regular hexagonal structure.

5. The air intake grille according to claim 2, characterized in that, At least two of the air inlets (23) have different effective flow areas, where the effective flow area is the net area formed by the inner side of the air inlet (23) that allows airflow to pass through.

6. The air intake grille according to claim 2, characterized in that, The inner wall of the air inlet (23) is inclined toward the edge of the air inlet grille from the upstream side to the downstream side of the airflow direction.

7. The air intake grille according to claim 2, characterized in that, The inner wall of the air inlet (23) is inclined toward the center of the air inlet grille from the upstream side to the downstream side of the airflow direction.

8. The air intake grille according to claim 1, characterized in that, The air inlet grille also includes an air outlet side (25) disposed opposite to the air inlet side (24), and the surface of the air inlet grille near the air outlet side (25) is configured to be concave upstream toward the airflow direction.

9. The air intake grille according to claim 1, characterized in that, The air inlet grille also includes an air outlet side (25) disposed opposite to the air inlet side (24), and the air outlet side (25) is provided with a groove (251).

10. The air intake grille according to claim 1, characterized in that, The air inlet grille also includes an air outlet side (25) disposed opposite to the air inlet side (24), and the surface of the air inlet grille near the air outlet side (25) is configured as a plane or protruding outward toward the downstream side of the airflow direction.

11. The air intake grille according to any one of claims 1-10, characterized in that, The air intake grille includes multiple grille bars, and the surfaces of the grille bars near the air intake side (24) are joined together to form an inwardly concave arc surface facing the downstream side of the airflow square.

12. The air intake grille according to claim 11, characterized in that, The thickness of each of the grid bars is different along the airflow direction, so that the side surface of the grid bars near the air inlet side (24) is spliced ​​together to form the arc surface.

13. The air intake grille according to claim 11, characterized in that, The extension directions of adjacent grilles form an angle so that the surface of the grilles on the side closest to the air inlet side (24) is joined together to form the arc surface.

14. The air intake grille according to claim 11, characterized in that, The cross-section of the grille is concave arc-shaped, and the surface of the grille near the air inlet side (24) is an arc segment. The radius of curvature R1 of the arc segment is equal to the radius of curvature R2 of the overall arc surface of the air inlet grille near the air inlet side (24).

15. A fresh air module, characterized in that, include: A volute (12) has an air inlet (121) formed on it. Wind turbine (13), the wind turbine (13) is disposed inside the volute (12); The air intake grille according to any one of claims 1-14, wherein the air intake grille is disposed at the air inlet (121).

16. The fresh air module according to claim 15, characterized in that, The air intake grille is located on one side of the axial direction of the impeller (13).

17. The fresh air module according to claim 15, characterized in that, The impeller (13) includes a motor (131) and an impeller (132). The motor (131) drives the impeller (132) to rotate. The surface of the air inlet grille near the air outlet side (25) is concave towards the upstream side of the airflow direction. There is a gap between the surface of the air inlet grille near the air outlet side (25) and the impeller (13). Part of the structure of the motor (131) is placed within the gap.

18. The fresh air module according to claim 15, characterized in that, The wind turbine (13) includes a motor (131) and an impeller (132), wherein the motor (131) drives the impeller (132) to rotate; The air intake grille has an air intake side (24) and an air outlet side (25) arranged opposite to each other along the airflow direction. The air outlet side (25) is provided with a groove (251), which is configured to avoid a portion of the structure of the motor (131).

19. An air conditioner, characterized in that, Includes the fresh air module as described in any one of claims 15-18.

20. The air conditioner according to claim 19, characterized in that, It also includes an indoor unit fan and an evaporator, and along the length of the indoor unit of the air conditioner, the fresh air module is located on one side of the indoor unit fan and / or the evaporator.

21. The air conditioner according to claim 19, characterized in that, The axial direction of the air intake grille is consistent with the length direction of the air conditioner.

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