An air conditioner provided with a grill

Abstract

This invention discloses an air conditioner with a grille, aiming to solve the problem of the inability to simultaneously achieve both grille density and air resistance. The outdoor unit of this air conditioner with a grille includes a positioning frame, a support portion, multiple air guide rings, and multiple connecting ribs. The positioning frame is installed near the air outlet and is located on the outer periphery of the support portion. The connecting ribs connect the support portion and the positioning frame, and the multiple connecting ribs are distributed at intervals along the circumference of the support portion. Multiple air guide rings are installed between the positioning frame and the support portion at least through the multiple connecting ribs. Multiple air outlet areas are formed between the positioning frame and the support portion. Along the axial direction of the positioning frame, the outer edge of the air guide rings away from the fan assembly is inclined at an angle away from the support portion, which is the air outlet angle. The air outlet angle in the air outlet area near the positioning frame is smaller than the air outlet angle in the air outlet area near the support portion. The air conditioner provided by this invention is used to improve the heat exchange efficiency of the outdoor unit.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to an air conditioner with a grille. Background Technology

[0002] An air conditioner, also known as an air conditioner, is a device that can regulate and control parameters such as temperature, humidity, and circulation speed of the air in a building or structure.

[0003] At the outdoor unit of the air conditioner, a fan assembly drives nearby air to flow through the outdoor unit's heat exchanger, enabling efficient heat exchange between the heat exchanger and the air. To prevent external debris or human hands from entering the outdoor unit and touching the fan assembly, a grille can be installed at the outdoor unit's air outlet.

[0004] However, if the grille has a high mesh density, it can prevent external debris or hands from entering the outdoor unit, increasing air resistance at the air outlet. If the grille has a low mesh density, it can reduce air resistance at the air outlet, but it cannot effectively prevent external debris or hands from entering the outdoor unit. Summary of the Invention

[0005] The purpose of this invention is to provide an air conditioner with a grille, which aims to solve the problem that the grille density and air resistance of the grille components cannot be balanced.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This invention provides an air conditioner with a grille. The air conditioner includes an outdoor unit, which comprises a housing, an outdoor heat exchanger, a fan assembly, and a grille. The housing has a mounting cavity and an air outlet. The fan assembly and the outdoor heat exchanger are located within the mounting cavity. The fan assembly drives airflow through the outdoor heat exchanger and out through the air outlet. The grille includes a positioning frame, a support portion, multiple air guide rings, and multiple connecting ribs. The positioning frame is installed near the air outlet and is located on the outer periphery of the support portion. The connecting ribs connect the support portion and the positioning frame, and the multiple connecting ribs are spaced apart circumferentially along the support portion. The multiple air guide rings are spaced apart between the positioning frame and the support portion at least through the multiple connecting ribs. Multiple air outlet areas are provided between the positioning frame and the support portion. Along the axial direction of the positioning frame, the outer edge of the air guide ring away from the fan assembly is inclined at an angle away from the support portion, which is the air outlet angle. The air outlet angle in the air outlet area near the positioning frame is smaller than the air outlet angle in the air outlet area near the support portion.

[0008] In the outdoor unit, the fan assembly located inside the casing drives airflow through the outdoor heat exchanger, thereby improving the heat exchange efficiency of the outdoor heat exchanger. At the air outlet of the outdoor unit casing, a grille is installed to prevent external debris from entering the mounting cavity of the casing and affecting the rotation of the fan assembly blades. Furthermore, the grille also prevents people from touching the fan assembly blades through the air outlet.

[0009] Thus, by setting the outer edge of the air guide ring away from the fan assembly and tilting it away from the support, the adjusted grille has the characteristics of low wind resistance and increased air volume of the outdoor unit. Furthermore, because the tilted air guide ring has a smaller tilt angle in the air outlet area near the positioning frame of the grille, and this area has a larger air volume, the optimized air outlet angle can better guide the airflow. This significantly optimizes the airflow concentration and uniformity, allowing the airflow to travel further and further improving the heat exchange effect of the outdoor heat exchanger, without requiring adjustments to the density of the air guide ring and other grille bars.

[0010] In some embodiments, the plurality of air outlet areas include at least a first air outlet area and a second air outlet area. A plurality of air guide rings near the support are located within the first air outlet area, and the second air outlet area is located between the first air outlet area and the positioning frame. Within the second air outlet area, along the axial direction of the positioning frame, at least a portion of the air guide rings near the positioning frame are offset towards the direction closer to the fan assembly, and the second air outlet angle within the second air outlet area is smaller than the first air outlet angle within the first air outlet area.

[0011] In some embodiments, the plurality of air outlet zones further includes a third air outlet zone located between the second air outlet zone and the positioning frame. At least a portion of the air guide ring near the positioning frame is located within the third air outlet zone, while another portion of the air guide ring is located within the second air outlet zone. Within the third air outlet zone, along the axial direction of the positioning frame, at least a portion of the air guide ring near the positioning frame is offset toward the direction closer to the fan assembly, and the third air outlet angle within the third air outlet zone is smaller than the second air outlet angle.

[0012] In some implementations, the area of ​​the first air outlet area is 2 to 3 times the area of ​​the second air outlet area.

[0013] In some implementations, the first air outlet angle α1 is in the range of 5°≤α1≤8°.

[0014] In some implementations, the air outlet angle α2 is in the range of 1° ≤ α2 < 5°.

[0015] In some implementations, the area of ​​the second air outlet area is 2 to 4 times the area of ​​the third air outlet area.

[0016] In some implementations, the third air outlet angle α3 is in the range of 1°≤α3<3°, and the second air outlet angle α2 is in the range of 3°≤α2<5°.

[0017] In some implementations, the area ratio of the first air outlet area, the area of ​​the second air outlet area, and the area of ​​the third air outlet area is 8:3:1.

[0018] In some implementations, the first air outlet angle is 5°, the second air outlet angle is 3°, and the third air outlet angle is 1°.

[0019] In some embodiments, the side of the air guide ring away from the support is the leeward side, and the air guide ring is connected to the leeward side by a chamfered bevel near the inner end face of the fan assembly along the axial direction of the positioning frame.

[0020] In some embodiments, the minimum angle between the chamfered bevel and the vertical line is the bevel angle β of the chamfered bevel. The value range of the bevel angle is 45°≤β<50°, 50°≤β<55°, or 55°≤β≤60°. The vertical line is a straight line perpendicular to the axis of the positioning frame.

[0021] In some implementations, when the air outlet area includes a first air outlet area, a second air outlet area, and a third air outlet area: the slope angle in the first air outlet area is greater than the slope angle in the second air outlet area, and the slope angle in the second air outlet area is greater than the slope angle in the third air outlet area.

[0022] In some embodiments, the grille further includes a plurality of first air guide strips, which are arc-shaped. Within the air outlet area between the air guide ring and the positioning frame, the plurality of first air guide strips are arranged at intervals and connected to at least one of the connecting ribs and the positioning frame. The outer edges of the first air guide strips are inclined away from the support and form an air outlet angle.

[0023] In some embodiments, the grille further includes a plurality of second air guide strips, which are arc-shaped. In the air outlet area between the support and the air guide ring, the plurality of second air guide strips are arranged at intervals and connected to at least one of the support and the connecting rib. The outer edges of the second air guide strips are inclined away from the support and form an air outlet angle. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1A schematic diagram of the refrigerant flow path of an air conditioner provided in an embodiment of this application;

[0026] Figure 2 An exploded structural diagram of the outdoor unit of an air conditioner provided as an example in this application;

[0027] Figure 3 for Figure 2 A front view of the grille shown in the image;

[0028] Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle;

[0029] Figure 5 for Figure 4 A partially enlarged schematic diagram of the upper middle air guide ring;

[0030] Figure 6 A schematic diagram of airflow in an outdoor unit provided for an embodiment of the application;

[0031] Figure 7 for Figure 5 A partial cross-sectional schematic diagram of the air guide ring shown in the figure;

[0032] Figure 8 This is a schematic diagram simulating the wind field of an outdoor unit of an air conditioner in a relevant scheme.

[0033] Figure 9 This is a schematic diagram of the first type of wind field simulation for the outdoor unit of an improved air conditioner.

[0034] Figure 10 This is a schematic diagram of airflow between two adjacent air guide rings in a relevant scheme.

[0035] Figure 11 This is a schematic diagram of airflow between two adjacent air guide rings after the improvement.

[0036] Figure 12 A schematic diagram simulating a wind field at the wind turbine components and air outlet;

[0037] Figure 13 This is a schematic diagram simulating the second type of wind field for the outdoor unit of an improved air conditioner.

[0038] Figure label:

[0039] 100-Air conditioner;

[0040] 10-Compressor; 20-Four-way valve; 30-Outdoor heat exchanger; 40-Throttling device;

[0041] 50 - Indoor heat exchanger;

[0042] 70 - Housing; 71 - Mounting cavity; 72 - Air outlet; 73 - Air return outlet;

[0043] 80 - Fan assembly;

[0044] 90 - Grille component; 91 - Positioning frame; 911 - First side strip; 912 - Second side strip; 92 - Grille strip; 921 - Air guide ring; 922 - First air guide strip; 923 - Second air guide strip; 9241 - Windward side; 9242 - Leeward side; 9243 - Inner end face; 9244 - Chamfered bevel; 93 - Connecting rib; 94 - Support part;

[0045] B1 - First air outlet area; B2 - Second air outlet area; B3 - Third air outlet area. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or relative positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationship shown in the accompanying drawings is satisfied.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly, such as fixed connection, detachable connection, or integral connection. Connections can be direct or indirect via an intermediate medium; they can be internal connections between two components or electrical connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0050] It should be noted that in practical applications, due to limitations in equipment precision or installation errors, achieving absolute parallelism or perpendicularity is difficult. The descriptions of perpendicularity, parallelism, or unidirectional orientation in this application are not absolute limitations, but rather indicate that perpendicular or parallel structural settings can be achieved within a preset error range (e.g., a vertical deviation of 5°) to achieve the corresponding preset effects. This maximizes the technical effect of the defined features and makes the corresponding technical solution easy to implement, demonstrating high feasibility.

[0051] In embodiments of the invention, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, article, or apparatus that includes that element.

[0052] In embodiments of the present invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in embodiments of the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Rather, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0053] An embodiment of this application provides an air conditioner with a grille (hereinafter referred to as an air conditioner). An air conditioner is a device that can adjust and control parameters such as temperature, humidity and circulation speed of the ambient air inside a building or structure.

[0054] like Figure 1 As shown, the air conditioner 100 may include a compressor 10, a four-way valve 20, an outdoor heat exchanger 30, a throttling device 40, and an indoor heat exchanger 50. For example, the four-way valve 20 may have a first port A, a second port B, a third port C, and a fourth port D, and the compressor 10 may have a return port and a discharge port, as shown. Figure 1The end of the air flowing into the compressor 10 along the direction of the arrow is the return end of the compressor, and the other end is the outlet end of the compressor 10.

[0055] The return end of the compressor 10 can be connected to the first port A of the four-way valve, the outlet end of the compressor 10 can be connected to the second port B of the four-way valve, the third port C of the four-way valve can be connected to one end of the outdoor heat exchanger 30, the other end of the outdoor heat exchanger 30 can be connected to one end of the indoor heat exchanger 50 through the throttling device 40, and the other end of the indoor heat exchanger 50 can be connected to the fourth port D of the four-way valve.

[0056] Air conditioner 100 may include two parts: an outdoor unit and an indoor unit, as shown in the reference. Figure 1 The compressor 10, four-way valve 20, and outdoor heat exchanger 30 can be part of the outdoor unit, and correspondingly, the indoor heat exchanger 50 can be part of the indoor unit. The throttling device 40 can be a capillary tube or an electronic expansion valve throttling device. The throttling device 40 can be, for example,... Figure 1 The throttling device 40 can be installed in the indoor unit, or it can be installed in the refrigerant line between the outdoor unit and the indoor unit. As long as the throttling device 40 is located between the indoor heat exchanger 50 and the outdoor heat exchanger 30 along the refrigerant flow direction.

[0057] Based on this, driven by the compressor 10, the refrigerant can circulate between the indoor and outdoor units through the pipeline and undergo a reversible phase change. At the same time as the refrigerant undergoes a phase change, it can release or absorb heat through the heat exchanger.

[0058] In this way, the refrigerant in the outdoor unit can exchange heat with the surrounding medium (such as air) through the outdoor heat exchanger 30, thereby releasing heat and heating the surrounding air (or absorbing heat to cool the nearby air). In the indoor unit, the refrigerant can exchange heat with the surrounding air through the indoor heat exchanger 50, thereby absorbing heat to cool the surrounding air (or releasing heat to heat the nearby air), thus achieving efficient cooling (or heating) of the air conditioner 100.

[0059] It should be noted that by adjusting the connection direction of the four-way valve 20, the air conditioner 100 can be in cooling mode (such as...). Figure 1 (solid line flow direction of the refrigerant) and heating conditions (such as...) Figure 1 The flow direction of the refrigerant (as indicated by the dotted line) can be flexibly adjusted. Furthermore, the function of the four-way valve 20 can be replaced by other switching devices or flow paths, or the four-way valve can be omitted and the air conditioner 100 can be configured as a single-cooling unit; this application does not limit this.

[0060] It should be noted that the indoor unit of air conditioner 100 can be a ducted unit. Ducted indoor units are typically installed in conjunction with a ceiling structure, allowing for concealed installation. This method offers advantages such as concealed installation, ease of integration with home ceiling designs, and good aesthetics.

[0061] In some embodiments, such as Figure 2 As shown, Figure 2 This is an exploded structural diagram of the outdoor unit of the air conditioner 100 provided in this application example. The outdoor unit can be regarded as part of the air conditioner 100. For example, the outdoor unit (or the air conditioner 100) may include a housing 70, an outdoor heat exchanger 30, and a fan assembly 80. The housing 70 may form an installation cavity 71, and an air outlet 72 may be provided on one side of the housing 70. The side with the air outlet 72 can be defined as the front side of the housing 70.

[0062] Continue to refer to Figure 2 The fan assembly 80 and the outdoor heat exchanger 30 can be located within the mounting cavity 71, and the fan assembly 80 can rotate to drive air to flow through the outdoor heat exchanger 30 and be blown out from the air outlet 72, thereby improving the heat exchange efficiency of the refrigerant through the outdoor heat exchanger 30 and the air. For example, the housing 70 can also have a return air inlet 73 at at least one of the rear side wall, left side wall, and right side wall, allowing the outdoor heat exchanger 50 to be installed close to the return air inlet 73, so that the air drawn into the mounting cavity 71 by the fan assembly 80 can exchange heat with the outdoor heat exchanger 50 at that location as it flows through the return air inlet 73, and then the air can be blown forward from the air outlet 72 driven by the fan assembly 80.

[0063] Alternatively, an air outlet 72 can be provided on the upper side wall of the housing 70. Correspondingly, at least one of the front, rear, left, and right side walls of the housing 70 can be provided with a return air outlet 73. If return air outlets 73 can be provided on the front and rear side walls and the left and right side walls of the housing 70, and the outdoor heat exchanger 30 can be installed close to the return air outlets 73, that is, the fan assembly 80 can drive air to flow through the outdoor heat exchanger 30 from the four return air outlets 73 and blow it upward from the air outlet 72, which is beneficial to increase the effective heat exchange area of ​​the outdoor heat exchanger 30 in the limited space of the installation cavity 71.

[0064] Alternatively, an outdoor heat exchanger 30 can be installed between the air outlet 72 and the fan assembly 80 so that the air flowing into the mounting cavity 71 from the return air outlet 73 can be blown out from the air outlet 72 after passing through the outdoor heat exchanger 30.

[0065] Furthermore, if the outdoor heat exchanger 30 is installed close to the return air inlet 73, taking one of the return air inlets 73 as an example located at the rear of the mounting cavity 71, it is also possible to eliminate the need for a rear side plate at the rear of the mounting cavity 71. In other words, the rear opening of the open mounting cavity 71 can serve as the return air inlet 73, which is beneficial for increasing the effective installation area of ​​the outdoor heat exchanger 30.

[0066] It should be noted that the fan assembly 80 within the mounting cavity 71 can be either an axial flow fan or a centrifugal fan. Taking an axial flow fan as an example, axial flow fans are characterized by simple structure, stability, reliability, low noise, and large air volume. Since an outdoor heat exchanger 30 can be installed at the return air vent 73, the multiple fins and refrigerant pipes of the outdoor heat exchanger 30 can serve as a grille structure at the return air vent 73, preventing external debris from entering the mounting cavity 71 with the air. Furthermore, it prevents hands from being inserted into the mounting cavity 71 through the return air vent 73 to touch the rotating blades of the fan assembly 80, thus preventing accidents.

[0067] Based on this, such as Figure 2 As shown, the outdoor unit may also include a grille 90, combined with... Figure 3 The grille 90 may include a positioning frame 91, a plurality of grille strips 92, a plurality of connecting ribs 93, and a support portion 94. The positioning frame 91 may be disposed near the air outlet 72 for connecting the housing 70, and the positioning frame 91 may be disposed on the outer periphery of the support portion 94 so that an installation area for the grille strips 92 and connecting ribs 93 can be formed between the support portion 94 and the positioning frame 91.

[0068] Within the installation area, multiple connecting ribs 93 can be distributed circumferentially along the support portion 94. One end of a connecting rib 93 can be connected to the positioning frame 91, and the other end of the connecting rib 93 can be connected to the support portion 94, so that the positioning frame 91 and the support portion 94 can form a stable frame structure through the multiple connecting ribs 93. Based on this, multiple grille strips 92 can be distributed circumferentially within the installation area. The grille strips 92 can be stably connected to the installation area through at least one of the connecting ribs 93, the positioning frame 91, and the support portion 94, and the gap between two adjacent grille strips 92 is used for airflow from the air outlet 72.

[0069] Thus, by installing the grille 90 at the air outlet 72, external debris can be prevented from entering the mounting cavity 71 through the air outlet 72 and affecting the rotation of the blades of the fan assembly 80. In addition, the grille 90 can also prevent people from touching the blades of the fan assembly 80 with their hands from the air outlet 72.

[0070] In some embodiments, such as Figure 3As shown, the positioning frame 91 may include a first side strip 911 and a second side strip 912, which may be arc-shaped structures. For example, the first end of the first side strip 911 may be connected to the first end of the second side strip 912, and the second end of the first side strip 911 may be connected to the second end of the second side strip 912, forming a plurality of grid strips 92 and a plurality of connecting ribs 93 installation areas at intervals.

[0071] For example, the first end and the second end of the first edge strip 911 can be set approximately perpendicularly, and the first end and the second end can be connected by a large-radius rounded corner structure. Correspondingly, the first end and the second end of the second edge strip 912 can also be set approximately perpendicularly, and the first end and the second end can also be connected by a large-radius rounded corner structure.

[0072] Thus, the first side strip 911 and the second side strip 912, with their arc-shaped structures, can form a leaf-shaped frame structure with an installation area in the middle and right-angled ends. Multiple connecting ribs 93 located within the installation area can be connected and fixed to the adjacent first side strip 911 or second side strip 912. These connecting ribs 93 can be straight segments or arc-shaped structures; there is no limitation on this.

[0073] Alternatively, the angle between the first end of the first edge strip 911 and the second end of the first edge strip 911 can be set to an obtuse angle, and the angle between the first end of the second edge strip 912 and the second end of the second edge strip 912 can also be set to an obtuse angle. This allows the arc-shaped first edge strip 911 and the second edge strip 912 to form a leaf-shaped frame structure with an installation area in the middle and acute angles at both ends.

[0074] Alternatively, the first and second side strips 911 and 912 of the arc-shaped structure can also form an elliptical or circular positioning frame 91. The first and second side strips 911 and 912 can also be designed as a polygonal structure, or their first and second ends can be connected by a chamfered structure, similarly forming a polygonal positioning frame 91. There are no limitations on this.

[0075] In some embodiments, such as Figure 3 As shown, the grille bar 92 may include multiple air guide rings 921. These multiple air guide rings 921 can be installed at intervals between the positioning frame 91 and the support portion 94, at least via connecting ribs 93. For example, the multiple air guide rings 921 can be multiple concentric ring structures distributed at intervals. In this way, multiple air outlet areas can be formed between the positioning frame 91 and the support portion 94 for air circulation.

[0076] Taking the positioning frame 91 as a leaf-shaped frame structure as an example, the grille strip 92 may also include multiple first air guide strips 922. The first air guide strips 922 may be arc-shaped structures. In the installation area between an air guide ring 921 away from the support 94 and the positioning frame 91, multiple first air guide strips 922 may be arranged at intervals and connected and fixed to at least one of the connecting rib 93 and the positioning frame 91.

[0077] When the installation area enclosed by the positioning frame 91 is not circular, the annular air guide ring 921 cannot fill all the space in the installation area. Therefore, in the installation area between the air guide ring 921 and the positioning frame 91, which is far from the center, the area can be filled by the first air guide strip 922 with an arc shape, so that the gaps between the grille strips 92 can prevent debris or human hands from entering the installation cavity 71.

[0078] In some embodiments, the ends of the plurality of connecting ribs 93 away from the positioning frame 91 can be connected and fixed to form a support portion 94, so that the positioning frame 91 and the plurality of connecting ribs 93 can form a stable frame structure for connecting and installing the plurality of grid strips 92. In this case, the support portion 94 can refer to the intersection and connection position of the plurality of connecting ribs 93.

[0079] In some other embodiments, such as Figure 3 As shown, the support 94 can also be an independent plate-like structure, sheet-like structure, or frame structure. In this way, a connecting rib 93 can be connected to the support 94 and the positioning frame 91, so that the support 94 can be stably installed between the positioning frames 91 through multiple connecting ribs 93.

[0080] For example, the support portion 94 can be a regular or irregular shape such as a circle, square, rectangle, parallelogram, pentagon, or hexagon. Based on this, the multiple air guide rings 921 are concentric ring structures distributed at intervals around the support portion 94.

[0081] Between a guide ring 921 (such as the smallest guide ring 921) near the support 94 and the support 94, the guide ring 921 can be fixedly connected to a part of the structure of the support 94 and a plurality of connecting ribs 93 so that there is a suitable gap between the guide ring 921 and the support 94.

[0082] Alternatively, a larger gap (i.e., installation area) can be formed between an air guide ring 921 near the support 94 and the support 94. For example... Figure 3 As shown, the grille 90 may also include a second air guide strip 923.

[0083] The number of second air guide strips 923 can be one or more. For example, the second air guide strip 923 can be an arc-shaped structure and located in the installation area between the support 94 and the air guide ring 921. One or more second air guide strips 923 can be arranged at intervals and connected to the support 94 and / or the corresponding connecting ribs 93, so that a gap of suitable size can be formed between the air guide ring 921 and the support 94 through one or more second air guide strips 923 for air circulation.

[0084] Thus, by installing the grille 90 at the air outlet 72, external debris can be prevented from entering the mounting cavity 71 through the air outlet 72 and affecting the rotation of the blades of the fan assembly 80. In addition, the grille 90 can also prevent people from touching the blades of the fan assembly 80 with their hands from the air outlet 72.

[0085] However, for the air outlet 72, the air blown out by the fan assembly 80 will collide with the rear end face of the grille strip 92 and the connecting rib 93 on the grille 90. This means that the grille 90 will reduce the air outlet area of ​​the air outlet 72, so that the air outlet 72 has a large wind resistance.

[0086] Therefore, if the gap between two adjacent grille strips 92 is smaller, although it can effectively prevent external debris and hands from entering the mounting cavity 71 through the air outlet 72, the denser grille strips 92 will result in greater wind resistance at the air outlet 72, thus reducing the airflow through the outdoor heat exchanger 30 at the outdoor unit and causing greater aerodynamic noise. However, if the gap between two adjacent grille strips 92 is increased, although the wind resistance at the air outlet 72 can be reduced, the grille 90 will be less effective at blocking debris and hands.

[0087] To solve the above problems, such as Figure 4 and Figure 5 As shown, Figure 4 For along Figure 3 Cross-sectional view of line AA in the middle. Figure 5 for Figure 4 A partially enlarged schematic diagram of the upper and middle air guide ring 921 shows that the outer edge (i.e., the front edge) of the air guide ring 921 can be tilted away from the support 94 at an angle called the air outlet angle α. When the position of the grille 90 is fixed, the front edge of the portion of the air guide ring 921 above the support 94 can be tilted upwards, the front edge of the portion of the air guide ring 921 below the support 94 can be tilted downwards, the front edge of the portion of the air guide ring 921 to the left of the support 94 can be tilted to the left, and the front edge of the portion of the air guide ring 921 to the right of the support 94 can be tilted to the right.

[0088] Thus, by setting up the above scheme, the adjusted grille 90 can have the characteristics of low wind resistance, which is conducive to increasing the air volume of the outdoor unit. In addition, the inclined grille strips 92 can better guide the wind outward, and at the same time greatly optimize the wind confinement of the air field, so that the air delivery distance of the air field is longer.

[0089] It should be noted that, in this embodiment, the air outlet angle α refers to the air outlet angle of the front edge of all grille bars 92 relative to the axis (i.e., the front-to-back direction) in the direction away from the support 94. For example, the air outlet angle of the front edge of the air guide ring 921 relative to the axis in the direction away from the support 94, the air outlet angle of the front edge of the first air guide bar 922 relative to the axis in the direction away from the support 94, and the air outlet angle of the front edge of the second air guide bar 923 relative to the axis in the direction away from the support 94. The air outlet angles on the same grille bar 92 can be the same or different, and this is not limited.

[0090] Combination Figure 6 When air is blown forward through the grille by the fan assembly, taking an axial flow fan assembly 80 as an example, the rotating shaft of the fan assembly 80 can be aligned with the positioning frame 91 (e.g., Figure 4 The axes (as shown) are approximately coincident in the front-to-back direction. Based on this, as air flows forward through the gaps between the grille bars 92, some air can be blown out in the front-to-back direction, but some air deviates and tilts away from the axis as it blows forward.

[0091] like Figure 7 As shown, Figure 7 for Figure 5 A partial cross-sectional schematic diagram of the air guide ring 921 shown, defining the air guide ring 921 (or grille bar 92) near the support portion 94 (such as... Figure 4 As shown, one side of the air guide ring 921 is the windward side 9241, and the side away from the support 94 is its leeward side 9242. The obliquely flowing air, after being reflected by the windward side 9241, will flow towards the support 94. This causes this portion of air to form turbulence or vortices with the portion of air flowing in the front-to-back direction, resulting in greater wind resistance and starting noise in the air blown out of the mounting cavity 71. Figure 8 As shown, the forward air delivery distance L1 of the outdoor unit of air conditioner 100 is relatively short.

[0092] However, by optimizing the grille strip 92 (especially the air guide ring 921) in the above scheme, the front edge of the grille strip 92 can be tilted away from the support 94 compared to the rear edge. In this way, after the partially tilted airflow contacts the windward surface 9241 and is reflected, the angle between its flow direction and the axis (i.e., the front-to-back direction) will decrease. That is, compared to the previous scheme, the angle of deviation of the reflected air towards the axis is reduced.

[0093] Thus, by setting up the above scheme, the air blown forward by the grille 90 can be better guided, allowing more air to be blown forward and reducing air turbulence and eddies in front of the grille 90. This helps reduce the wind resistance and aerodynamic noise of the outdoor unit, and also helps increase the forward air delivery distance of the outdoor unit, preventing the re-intake of heat-exchanged air from affecting the heat exchange efficiency of the outdoor heat exchanger, thereby improving the heat exchange efficiency of the outdoor unit.

[0094] It should be noted that, in this embodiment of the application, the axis of the fan assembly 80 can be set parallel to the front-to-back direction, and the axes of the corresponding air outlet 72, grille 90, positioning frame 91 and support 94 can also be set parallel to the front-to-back direction.

[0095] Based on this, such as Figure 5 As shown, the air outlet angle α can be set to a range of 1° to 8°. If the air outlet angle is less than 1°, the inclined guide ring 921 and other grille strips 92 (such as...) Figure 3 (As shown) has poor air guidance. If the included angle of inclination is greater than 8°, it will cause the air outlet area between two adjacent grille bars 92 to decrease in the front-to-back direction, thereby increasing the wind resistance of the grille 90 and reducing the air outlet efficiency.

[0096] Therefore, by setting the air outlet angle α to satisfy 1°≤α≤8°, the inclined grille bars 92 can better guide the airflow, greatly optimizing the airflow confinement and increasing the air delivery distance. Simultaneously, it reduces the wind resistance at the grille 90, which helps increase the airflow at the outlet 72, thus improving the heat exchange efficiency of the outdoor heat exchanger 30.

[0097] For example, the air outlet angle α can be 1°, 1.5°, 2°, 2.5°, 3°, 3.5°, 4°, 4.5°, 5°, 5.5°, 6°, 6.5°, 7°, or 8°, and this application does not limit it. For example, the range of the air outlet angle α can be set to: 1°≤α<3°, 3°≤α<5°, or 5°≤α≤8°.

[0098] Taking a plurality of grille strips 92 arranged on the same plane perpendicular to the front-back direction as an example, the air outlet angle α of the air guide ring 921 in this plane ranges from 1°≤α<3°, 3°≤α<5°, or 5°≤α≤8°. If the grille strips 92 also include at least one of the first air guide strip 922 and the second air guide strip 923, the air outlet angle α of the corresponding first air guide strip 922 and / or the second air guide strip 923 can also range from 1°≤α<3°, 3°≤α<5°, and / or 5°≤α≤8°.

[0099] In some embodiments, within the air outlet area of ​​the positioning frame 91, from the inside out (i.e., from the support 94 toward the positioning frame 91, such as the length direction of the connecting rib 93), the air outlet angle of the grille strip 92 near the outer side can be set to be smaller than the air outlet angle near the inner side. Setting the air outlet angle near the positioning frame 91 to be smaller than the air outlet angle near the support 94 is beneficial for improving the overall airflow and delivery distance of the grille 90.

[0100] It should be noted that, as Figure 4 As shown, on the inner side of the positioning frame 91 near the support portion 94, multiple grid strips 92 can be distributed at intervals with the support portion 94 as the center. The grid strips 92 are... Figure 3 Taking the air guide ring 921 shown as an example, multiple air guide rings 921 can be multiple concentric ring structures that increase in size from the inside to the outside.

[0101] In some embodiments, such as Figure 4 As shown, multiple air outlet areas, such as a first air outlet area B1 and a second air outlet area B2, can be formed between the positioning frame 91 and the support portion 94. Alternatively, the multiple air outlet areas located between the positioning frame 91 and the support portion 94 may also include a first air outlet area B1, a second air outlet area B2, and a third air outlet area B3.

[0102] For example, multiple air guide rings 921 distributed near the support portion 94 can be located within the first air outlet area B1, that is, the first air outlet area B1 can surround the support portion 94. If the grille strip 92 also includes a second air guide strip 923, one or more second air guide strips 923 are also located within the first air outlet area B1.

[0103] Taking a positioning frame 91 that includes only a first air outlet area B1 and a second air outlet area B2 as an example, the second air outlet area B2 can be located between the first air outlet area B1 and the positioning frame 91. For instance, at least a portion of the air guide ring 921 near the positioning frame 91 can be located within the second air outlet area B2. If the grille strip 92 also includes multiple first air guide strips 922, the multiple first air guide strips 922 can be located within the second air outlet area B2.

[0104] When the positioning frame 91 simultaneously includes a first air outlet area B1, a second air outlet area B2, and a third air outlet area B3, at least a portion of the air guide ring 921 near the positioning frame 91 can be located within the third air outlet area B3, and another portion of the air guide ring 921 can be located within the second air outlet area B2. When the grille strip 92 also includes a plurality of first air guide strips 922, the plurality of first air guide strips 922 can be located within the third air outlet area B3.

[0105] Combination Figure 4 Within the first air outlet area B1, the front edges of the grille strips 92 (or air guide rings 921) can be in the same plane. Alternatively, multiple grille strips 92 (or air guide rings 921) within the first air outlet area B1 can be arranged to gradually shift backward from the inside out.

[0106] Within the second air outlet area B2, at least a portion of the grille strips 92 (or air guide rings 921) near the positioning frame 91 are offset backwards, and the degree of backward offset of the grille strips 92 in the second air outlet area B2 is greater than or equal to the degree of backward offset of the grille strips 92 in the first air outlet area B1. For example, multiple grille strips 92 (or air guide rings 921) within the second air outlet area B2 are gradually offset backwards from the inside out.

[0107] Based on this, the second air outlet angle α2 in the second air outlet area can be set to be smaller than the air outlet angle α1 of B1 in the first air outlet area. For the grille 90 of the axial flow fan, the air volume of the outer air outlet area (such as the second air outlet area) is larger. By reducing the air outlet angle of the outer air outlet area, it is beneficial to reduce the overall wind resistance of the grille 90 and increase the air outlet distance.

[0108] Within the third air outlet zone B3, at least a portion of the grille strips 92 (or air guide rings 921) near the positioning frame 91 are offset backwards, and the degree of backward offset of the grille strips 92 in the third air outlet zone B3 is greater than or equal to the degree of backward offset of the grille strips 92 in the second air outlet zone B2. For example, multiple grille strips 92 (or air guide rings 921) within the third air outlet zone B3 are gradually offset backwards from the inside out.

[0109] Based on this, the third air outlet angle α3 in the third air outlet area can be set to be smaller than the air outlet angle α2 of B2 in the second air outlet area. For the grille 90 of the axial flow fan, the air volume of the outer air outlet area (such as the third air outlet area) is larger. By reducing the air outlet angle of the outer air outlet area, it is beneficial to reduce the overall wind resistance of the grille 90 and increase the air outlet distance.

[0110] In the above embodiments, the air guide ring 921 within the same air outlet area can be a complete air guide ring 921 or an incomplete air guide ring 921. For example, the second air outlet area B2 can have one or more complete air guide rings 921, or some air guide rings 921 within the second air outlet area B2 can also include one or more incomplete air guide rings 921, and another part of these incomplete air guide rings 921 can be located within the first air outlet area B1 and / or the third air outlet area B3.

[0111] For example, taking the positioning frame 91 of the grille 90 forming a leaf-shaped border structure as an example, between the two connection points of the first side strip 911 and the second side strip 912, a boundary line can be set between these two connection points, and the grille strip 92 on the boundary line can separate the second air outlet area B2 and the third air outlet area B3.

[0112] In some embodiments, the area of ​​the first air outlet region B1 can be set to be 2 to 3 times the area of ​​the second air outlet region B2. Alternatively, the area of ​​the second air outlet region B2 can be set to be 2 to 4 times the area of ​​the third air outlet region B3, which is beneficial to improving the overall air outlet uniformity of the grille 90.

[0113] For example, the area ratio of the first air outlet area B1, the area of ​​the second air outlet area B2, and the area of ​​the third air outlet area B3 can be set to 8:3:1, which is beneficial to improving the overall air outlet uniformity of the grille 90.

[0114] Based on this, if the grille 90 simultaneously provides a first air outlet area B1, a second air outlet area B2, and a third air outlet area B3, the first air outlet angle of the grille strip 92 in the first air outlet area B1 can be set to 5°≤α1≤8°, the second air outlet angle of the grille strip 92 in the second air outlet area B2 can be set to 3°≤α2<5°, and the third air outlet angle of the grille strip 92 in the third air outlet area B3 can be set to 1°≤α3<3°. For example, the air outlet angles of the first air outlet area B1, the second air outlet area B2, and the third air outlet area B3 can be set to 5°, 3°, and 1° respectively, combined with... Figure 9 According to wind field simulation experiments, in the improved scheme, the forward air supply distance L2 of the outdoor unit of air conditioner 100 is greater than L1, which is conducive to improving the heat exchange efficiency of the outdoor heat exchanger in the outdoor unit.

[0115] Among them, the air outlet angle α includes the first air outlet angle α1, the second air outlet angle α2 and the third air outlet angle α3.

[0116] In some other embodiments, if the grille 90 is provided with both a first air outlet area B1 and a second air outlet area B2, the first air outlet angle of the grille strip 92 in the first air outlet area B1 can be set to 5°≤α1≤8°, and the second air outlet angle of the grille strip 92 in the second air outlet area B2 can be set to 3°≤α2<5° or 1°≤α2<5°. This is also beneficial to improving the forward air supply distance of the outdoor unit and the heat exchange efficiency of the outdoor heat exchanger.

[0117] Based on this, combined Figure 10 , Figure 10 This is a schematic diagram of airflow between two adjacent air guide rings 921 in a related scheme. It is evident that between two adjacent air guide rings 921 (or two adjacent grille bars 92), air flowing at an angle C1 will flow towards the windward surface 9241 of the two air guide rings 921 (e.g., ...). Figure 7 The air is blown out after reflecting at least three times between the windward side 9242 and the leeward side 9242, thus creating a large wind resistance between the two adjacent wind guide rings 921.

[0118] However, through the above-mentioned improvement schemes, such as Figure 11 As shown, Figure 11 This is a schematic diagram illustrating airflow between two adjacent guide rings 921 after the improvement. In the improved design, between the two obliquely arranged guide rings 921 (or two adjacent grille bars 92), when air... Figure 10 When the airflow flows into the space between the two guide rings 921 at the angle shown in C1, Figure 11 An airflow path as shown in C2 can be formed, meaning that the air can be reflected twice between the windward side 9241 and the leeward side 9242 before being blown forward.

[0119] That is, by using the inclined arrangement of the grille bars 92 and the arrangement of at least one of the second air outlet area B2 and the third air outlet area B3 in the above scheme, it is beneficial to reduce the number of air reflections between two adjacent grille bars 92. In this way, it is beneficial to reduce air turbulence and eddies between the two grille bars 92, thereby reducing the wind resistance of the grille member 90 without changing the spacing between the grille bars 92.

[0120] like Figure 5 and Figure 7 As shown, since the grille strip 92 (or the air guide ring 921) is far away from the support 94 (e.g. Figure 4 The side of the grille strip 92 (as shown above) is its leeward side 9242, and the side of the grille strip 92 facing the support 94 (as shown below) is its windward side 9241. The grille strip 92 (or the guide ring 921) can be defined to be close to the fan assembly (as shown below) along the circumference of the positioning frame 91. Figure 2 The inner end face 9243 (i.e., the rear side) shown.

[0121] Based on this, continue to refer to Figure 10 With the inner end face 9243 of the air guide ring 921 (such as...) Figure 7 Taking the example shown, some of the air flowing at an angle C1, after being blown toward and contacting the inner end face 9243, will be reflected backward and flow into the air. Figure 3 The installation cavity 71 shown reduces the airflow at the air outlet 72 and increases wind resistance.

[0122] To solve this problem, such as Figure 7 As shown, the air guide ring 921 (or another type) may also have a chamfered bevel 9244, and the leeward side 9242 may be connected to the inner end face 9243 via the chamfered bevel 9244. As air flows through the grille 90, it either blows forward or diagonally forward and towards the windward side 9241 and the inner end face 9243.

[0123] Combination Figure 7 and Figure 11 By setting a chamfered bevel between the leeward side 9242 and the inner end face 9243, some air is in a... Figure 10 When the airflow angle at E1 blows through the guide ring 921 or the grille bar 92, some of the air can... Figure 11 As shown in E2, the air blows along the notched area of ​​the chamfered slope 9244 towards the windward surface 9241. After contacting the front part of the windward surface 9241 and being reflected, it can be directly blown out of the outlet 72 (as shown in E2). Figure 3 (As shown).

[0124] Thus, by setting the chamfered slope 9244, this part of the air can be blown forward more smoothly along the angle of the chamfered slope 9244, which is equivalent to reducing the air resistance of the grille 90 and helping to increase the air volume of the outdoor unit.

[0125] In some embodiments, such as Figure 7 and Figure 11 As shown, taking a vertical line that is perpendicular to the front-back direction (i.e., the axis of the positioning frame 91) as an example, the minimum angle between the chamfered bevel 9244 and one of the vertical lines can be defined as the bevel angle β of the chamfered bevel 9244. The value range of the bevel angle β can be set to 45° to 60°. If the bevel angle β is less than 45°, the amount of air blown out along the E2 path will be reduced. If the bevel angle β is greater than 60°, the area of ​​the thinner region at the rear end of the grille strip 92 will be increased. That is, by using a bevel angle of 45°≤β≤60°, the air resistance of the grille 90 can be further reduced, which is beneficial to increasing the air volume of the outdoor unit.

[0126] For example, the slope angle β can be set to 45°, 50°, 55°, and 60°. For instance, the range of values ​​for the slope angle β can be set to: 45°≤β<50°, 50°≤β<55°, or 55°≤β≤60°.

[0127] Based on this, taking the air outlet angles α of the first air outlet area B1, the second air outlet area B2, and the third air outlet area B3 as 5°, 3°, and 1° respectively, and the slope angle β as 45°, as an example, a grille component 90 is fabricated. Through simulated wind field tests, it can be seen that the wind field trajectory at the air outlet of the outdoor unit equipped with this design is as follows... Figure 12 As shown, the irregular curved surface grille 90, which has a second air outlet area B2 and a third air outlet area B3, is approximately in line with the wind field trajectory, which helps to reduce the wind resistance at the grille 90 and reduce the generation of aerodynamic noise.

[0128] Based on this, combined Figure 13 By setting Figure 12 A comprehensive wind field simulation of the outdoor unit in the proposed scheme shows that, in the improved scheme, the forward airflow distance L3 of the outdoor unit of air conditioner 100 is greater than... Figure 9 The air delivery distance L2 further reduces the air resistance at the air outlet and helps increase the air volume. For example, for Figure 8 (Option 1) and Figure 13 (Scheme 2) The outdoor units of the two types of air conditioners 100 are simulated and compared. With the air volume and noise intensity at the same speed as reference, the parameters shown in Table 1 and Table 2 can be obtained through simulation test.

[0129] Table 1

[0130] Fan component rotational speed (r / min) <![CDATA[Air volume of Plan 1 (m 3 / h)]]> <![CDATA[Air volume of Plan 2 (m 3 / h)]]> 730 3701.98 3791.22 820 4227.23 4304.53 850 4402.55 4465.84 890 4641.85 4710.81

[0131] Table 2

[0132] Fan component rotational speed (r / min) Option 1 Noise / dB(A) Option 2 air volume / dB(A) 730 39.4 35.8 820 55.8 54.5 850 56.8 55.0 890 58.3 57.6

[0133] As shown in Tables 1 and 2, at different speeds, the improved Scheme 2 has a higher air volume and lower noise compared to the original Scheme 1. In summary, this application, through improvements to the grille 90, significantly improves the air volume and delivery distance at the outdoor unit's air outlet, and effectively reduces the noise intensity at that location.

[0134] Based on this, the slope angle in the first air outlet area B1 can be set to be greater than the slope angle in the second air outlet area B2, and the slope angle in the second air outlet area B2 can be greater than the slope angle in the third air outlet area B3. For example, the slope angle β in the first air outlet area B1, the second air outlet area B2, and the third air outlet area B3 can be 55°≤β≤60°, 50°≤β<55°, and 45°≤β<50° respectively, or the slope angle β in the first air outlet area B1, the second air outlet area B2, and the third air outlet area B3 can also decrease sequentially within one of the value ranges of 55°≤β≤60°, 50°≤β<55°, or 45°≤β<50°.

[0135] Thus, a larger slope angle β can reduce the wind-receiving area of ​​the inner end face 9243 of the grille bar 92, thereby reducing the wind resistance at the corresponding air outlet area and increasing its air volume. The sequential increase of the third, second, and first air outlet angles causes the wind resistance of the third air outlet area B3, the second air outlet area B2, and the first air outlet area B1 to increase sequentially. This tiered distribution of slope angles helps to balance the increase in wind resistance caused by the air outlet angle, thereby further reducing the overall wind resistance of the grille 90 and increasing its air volume. In some embodiments, the leeward side 9242 and the chamfered slope 9244 can be connected by a rounded corner structure, the inner end face 9243 and the chamfered slope 9244 can be connected by a rounded corner structure, and the windward side 9241 and the leeward side 9242 can be connected by a rounded corner structure. The above three rounded corner structures can be selected as one, two, or all of them. The radius of the rounded corner structure can be 0.5 to 0.7 times the thickness of the grid strip 92. For example, the radius of the rounded corner structure can be 0.5, 0.6, or 0.7 times the thickness of the grid strip 92.

[0136] Thus, when air flows over the rear edge of the grille bar 92, the rounded corner structure helps to reduce the air resistance and starting noise at that point.

[0137] In some embodiments, combined with Figure 5 and Figure 7 Between two adjacent air guide rings 921 of the grille bar 92, the vertical distance between the two adjacent air guide rings 921 is the gap size M of the two air guide rings 921. The gap size can be set to be less than or equal to 8.0mm, which meets the national standard design specification of 8.6mm.

[0138] For example, the gap between two adjacent air guide rings 921 can be set to 7.3mm≤M≤8mm. This allows the grille 90 to effectively prevent external debris or fingers from being inserted into the mounting cavity 71, while also ensuring that the outdoor unit has less wind resistance and airflow at the air outlet 72. This helps improve the heat exchange efficiency of the outdoor unit and reduce its noise.

[0139] In some other embodiments, combined Figure 5 and Figure 7 At a grille strip 92, such as an air guide ring 921, the thickness of the air guide ring 921 can be the vertical distance between its windward side 9241 and its first leeward side 9242, that is, the thickness d can be set to 1.5mm to 3mm. The thickness d can be 1.5mm ≤ d < 2mm, 2mm ≤ d < 2.5mm, or 2.5mm ≤ d ≤ 3mm, and there is no limitation on this.

[0140] It should be noted that, in the embodiments of this application, the first air guide strip 922 and the second air guide strip 923 in the grille strip 92 can also be set according to the above-mentioned gap size M and thickness size d. The corresponding first air guide strip 922 and the second air guide strip 923 in the grille strip 92 can also be set according to the air outlet angle α, chamfered bevel 9244 and rounded corner structure in the above scheme, etc., and this application does not limit them.

[0141] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0142] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An air conditioner with a grille, comprising an outdoor unit, characterized in that, The outdoor unit includes: The housing has a mounting cavity and an air outlet; Outdoor heat exchanger; A fan assembly and the outdoor heat exchanger are located in the mounting cavity. The fan assembly is used to drive air to flow through the outdoor heat exchanger and blow it out from the air outlet. and a grille element, the grille element comprising: The positioning frame is installed close to the air outlet; The positioning frame is located on the outer periphery of the support portion; Multiple connecting ribs are provided, which connect the support portion and the positioning frame, and the multiple connecting ribs are distributed at intervals along the circumference of the support portion; Multiple air guide rings are installed between the positioning frame and the support portion at intervals via at least a plurality of connecting ribs; The side of the air guide ring away from the support is the leeward side. The air guide ring is connected to the leeward side via a chamfered bevel along the axial direction of the positioning frame and close to the inner end face of the fan assembly. The minimum angle between the chamfered bevel and the vertical line is the bevel angle β of the chamfered bevel. The positioning frame and the support have multiple air outlet areas; along the axial direction of the positioning frame, the outer edge of the air guide ring away from the fan assembly is tilted at an angle away from the support, which is the air outlet angle, and the air outlet angle in the air outlet area near the positioning frame is smaller than the air outlet angle in the air outlet area near the support. The plurality of said air outlet areas include at least: The first air outlet area, with a plurality of air guide rings near the support portion located within the first air outlet area; The second air outlet area is located between the first air outlet area and the positioning frame; The air outlet area also includes: The third air outlet area is located between the second air outlet area and the positioning frame; In the case where the air outlet area includes a first air outlet area, a second air outlet area, and a third air outlet area: The slope angle in the first air outlet area is greater than the slope angle in the second air outlet area, and the slope angle in the second air outlet area is greater than the slope angle in the third air outlet area.

2. The air conditioner with a grille according to claim 1, characterized in that, In the second air outlet area, along the axial direction of the positioning frame, at least part of the air guide ring close to the positioning frame is offset toward the direction close to the fan assembly, and the second air outlet angle in the second air outlet area is smaller than the first air outlet angle in the first air outlet area.

3. The air conditioner with a grille according to claim 2, characterized in that, At least a portion of the air guide ring near the positioning frame is located in the third air outlet area, and another portion of the air guide ring is located in the second air outlet area; in the third air outlet area, along the axial direction of the positioning frame, at least a portion of the air guide ring near the positioning frame is offset toward the direction of the fan assembly, and the third air outlet angle in the third air outlet area is smaller than the second air outlet angle.

4. The air conditioner with a grille according to claim 2 or 3, characterized in that, The area of ​​the first air outlet area is 2 to 3 times the area of ​​the second air outlet area; and / or, The first air outlet angle α1 has a value range of 5°≤α1≤8°; and / or, The second air outlet angle α2 has a range of 1°≤α2<5°.

5. The air conditioner with a grille according to claim 3, characterized in that, The area of ​​the second air outlet area is 2 to 4 times the area of ​​the third air outlet area; and / or, The value range of the third air outlet angle α3 is 1°≤α3<3°, and the value range of the second air outlet angle α2 is 3°≤α2<5°.

6. The air conditioner with a grille according to claim 3, characterized in that, The area ratio of the first air outlet area, the area of ​​the second air outlet area, and the area of ​​the third air outlet area is 8:3:1; and / or, The first air outlet angle is 5°, the second air outlet angle is 3°, and the third air outlet angle is 1°.

7. The air conditioner with a grille according to claim 6, characterized in that, The angle of the inclined plane is in the range of 45°≤β<50°, 50°≤β<55°, or 55°≤β≤60°. The vertical line is a straight line perpendicular to the axis of the positioning frame.

8. The air conditioner with a grille according to any one of claims 1 to 3, characterized in that, The grille also includes: Multiple first air guide strips, each having an arc-shaped structure; within the air outlet area between the air guide ring and the positioning frame, the multiple first air guide strips are arranged at intervals and connected to at least one of the connecting rib and the positioning frame; the outer edges of the first air guide strips are inclined away from the support portion, forming the air outlet angle; and / or, Multiple second air guide strips, each having an arc-shaped structure, are arranged at intervals within the air outlet area between the support and the air guide ring, and are connected to at least one of the support and the connecting rib; the outer edges of the second air guide strips are inclined in a direction away from the support and form the air outlet angle.

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