An air conditioner

Abstract

The utility model relates to air conditioning technical field provides an air conditioner, include: air duct casing, the length direction of air conditioner forms fan cavity, crossflow fan, be located in fan cavity, wherein, air duct casing includes the volute tongue structure of setting along the length direction, volute tongue structure includes the basic volute tongue section and end volute tongue section all with crossflow fan corresponding setting, end volute tongue section is connected to the length direction of basic volute tongue section at least one end, be equipped with a plurality of first flow guide ribs on basic volute tongue section, end volute tongue section is equipped with a plurality of second flow guide ribs, and at least part second flow guide rib protrudes from first flow guide rib, and / or, in the circulation direction of airflow, the starting end of end volute tongue section is located downstream of the starting end of basic volute tongue section. Any scheme of the utility model can improve the air outlet speed between end volute tongue section and crossflow fan, effectively avoid the backflow of airflow at the end of air outlet close to air duct casing, reduce the panting noise due to backflow.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an air conditioner. Background Technology

[0002] During the operation of an air conditioner indoor unit, airflow organization and noise control are crucial aspects affecting product performance and user experience. Under normal circumstances, the airflow in the indoor unit flows towards the air outlet after passing through the volute structure of the duct casing. However, during this process, a backflow phenomenon occurs near the length end of the air outlet. This backflow inherently hinders the smooth flow of air, resulting in uneven energy distribution at the outlet end area. This, to some extent, affects the air conditioner's airflow efficiency and effectiveness, and may also generate slight noise, subtly impacting the quietness of the indoor environment.

[0003] As air conditioners are used for extended periods, an unavoidable problem gradually emerges: the amount of dust accumulating on the filter increases. Because cross-flow fans have relatively low static pressure, when system resistance increases due to filter dust accumulation, their ability to maintain airflow stability significantly decreases, leading to further fluctuations in airflow stability. These fluctuations exacerbate backflow near the end of the air outlet, worsening the already unstable airflow and causing instability in the eccentric vortex. This instability in the eccentric vortex triggers abnormal breathing noise. The irregular changes in the frequency and intensity of this noise severely disrupt the quiet atmosphere of the room, causing significant annoyance to users and greatly impacting their comfort and satisfaction when using the air conditioner. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, or at least partially solve the above-mentioned technical problems, the first objective of this utility model is to provide an air conditioner that improves the gas flow speed and gas flow volume at the end of the volute tongue structure by improving the end volute tongue segment at least one end in the length direction of the volute tongue structure, thereby reducing backflow near the end of the air conditioner outlet and reducing breathing noise.

[0005] The first aspect of this utility model provides an air conditioner, comprising:

[0006] The air duct casing has a fan cavity formed along the length of the air conditioner.

[0007] A cross-flow fan is installed inside the fan cavity;

[0008] The duct housing includes a volute structure arranged along its length. The volute structure includes a base volute section and an end volute section, both of which are corresponding to the cross-flow fan. The end volute section is connected to at least one end of the base volute section along its length.

[0009] The basic volute tongue segment is provided with a plurality of first guide ribs, and the end volute tongue segment is provided with a plurality of second guide ribs, at least a portion of the second guide ribs protruding from the first guide ribs;

[0010] And / or, in the direction of airflow, the starting end of the end volute segment is located downstream of the starting end of the base volute segment.

[0011] In the above technical solution, the present invention, through the special design of the end volute tongue section, whether the second guide rib is at least partially protruding, or the starting end of the end volute tongue section is located downstream of the starting end of the basic volute tongue section, or a combination of both, can improve the air outlet speed between the end volute tongue section and the cross-flow fan, effectively prevent the airflow from backflowing at the end of the air outlet near the end of the duct housing, make the airflow discharge more smoothly, improve the airflow efficiency of the air conditioner, and reduce the breathing noise caused by backflow.

[0012] In some embodiments, the second guide rib includes a high guide rib and a low guide rib. The high guide rib is disposed in the middle region of the end volute segment and / or the edge region of the end volute segment away from the base volute segment, and the high guide rib protrudes from the low guide rib and the first guide rib.

[0013] In the above technical solution, the high-level guide rib is located in the middle region of the end volute segment and / or the edge region away from the basic volute segment. These regions are typically where airflow is prone to turbulence and backflow. The high-level guide rib protrudes from the low-level guide rib and the first guide rib, and when the airflow passes through the end volute segment, it can more effectively concentrate the airflow, increase the outlet velocity of the gap between the end volute segment and the cross-flow fan, and the rapid outlet can better suppress the occurrence of backflow.

[0014] In some embodiments, the basic volute tongue segment is provided with a first windward surface and a first air guide surface in sequence along the airflow direction, and the end volute tongue segment is provided with a second windward surface and a second air guide surface in sequence along the airflow direction.

[0015] The first guide rib is disposed on the first windward surface, and the high-position guide rib and the low-position guide rib are at least partially disposed on the second windward surface, with the portion of the high-position guide rib on the second windward surface protruding beyond the first guide rib.

[0016] In the above technical solution, since part of the high-position guide rib protrudes from the first guide rib on the second windward surface, the protruding part blocks and guides the airflow, enabling the airflow to adjust its direction and increase its outlet speed more effectively when passing the second windward surface, thus effectively suppressing the occurrence of backflow.

[0017] In some embodiments, the high-position guide rib and the low-position guide rib extend from the second windward surface to the second air guide surface, and the portion of the high-position guide rib on the second air guide surface protrudes from the first air guide surface.

[0018] In the above technical solution, the high-position guide rib protrudes from the first air guide surface on the second air guide surface, which makes the airflow in the end area stronger and can increase the air outlet speed at the second air guide surface of the end volute segment, more effectively suppress the occurrence of backflow phenomenon, thereby improving the overall air outlet effect of the air conditioner.

[0019] In some embodiments, the second windward surface and the second air guide surface are connected at an angle and with a rounded transition. Along the airflow direction, the height of the high-position guide rib and the low-position guide rib gradually increases on the second windward surface and gradually decreases on the second air guide surface.

[0020] In some embodiments, the portion of the lower guide rib on the second windward surface extends at the same height as the first guide rib; in the airflow direction, the starting end of the higher guide rib protrudes beyond the starting end of the lower guide rib.

[0021] In some embodiments, a first guide groove is formed between the first guide ribs, and the first guide groove is recessed on the first windward surface;

[0022] A second guide groove is formed between the second guide ribs, and the second guide groove extends from the second windward surface to the second air guide surface.

[0023] In the above technical solution, the first guide channel reduces the disordered flow and collision of airflow at the basic volute tongue section, reduces the energy loss of airflow, and improves the flow efficiency of airflow at the basic volute tongue section. The second guide channel enables the airflow to flow continuously on different surfaces of the end volute tongue section, avoiding turbulence and backflow at the transition between surfaces, making the airflow smoother and further improving the airflow velocity and airflow volume.

[0024] In some embodiments, the extension length of the second guide groove between the high-level guide ribs is greater than the extension length of the first guide groove between the low-level guide ribs.

[0025] The above technical solution makes the airflow in the second guide groove between the high-level guide ribs smoother.

[0026] In some embodiments, the volute structure further includes a baffle plate disposed between two adjacent high-level guide ribs, the baffle plate being used to block the second guide groove between the high-level guide ribs.

[0027] In the above technical solution, the high-level guide rib protrudes from the first guide rib, reducing the gap between the cross-flow fan and the volute structure. A baffle is provided in the second guide groove between the high-level guide ribs. When the airflow passes through, part of the airflow is blocked by the baffle and the high-level guide rib and guided to flow into the gap, thereby increasing the air outlet speed. Part of the airflow flows out continuously through the first guide groove between the low-level guide ribs and the second guide groove between the low-level guide ribs and the high-level guide ribs, thereby improving the air outlet effect.

[0028] In some embodiments, the cross-flow fan includes a rotor section and segmented plates, the segmented plates being spaced apart along the length direction and connected between adjacent rotor sections;

[0029] A first region is formed between the end sidewall of the air duct housing and the adjacent segment plate, and the end volute segment is disposed opposite to the first region.

[0030] The above technical solution can maximize the improvement of the air outlet speed and air volume near the end of the air duct housing of the volute tongue structure, reduce the backflow at the air outlet near the end of the air duct housing, and reduce the breathing noise caused by backflow. Attached Figure Description

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

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of an air conditioner according to the present invention;

[0034] Figure 2 This is a utility model Figure 1 A cross-sectional view along the AA direction;

[0035] Figure 3 This is a utility model Figure 2 An enlarged schematic diagram of point A in the middle;

[0036] Figure 4 This is a schematic diagram of a duct housing according to the present invention;

[0037] Figure 5 This is a utility model Figure 4 An enlarged diagram of point B in the middle;

[0038] Figure 6This is a utility model Figure 5 A diagram from another angle;

[0039] Figure 7 This is a schematic diagram of another type of air duct housing according to this utility model;

[0040] Figure 8 This is a utility model Figure 7 An enlarged schematic diagram at point C;

[0041] Figure 9 This is a utility model Figure 8 A diagram from another angle;

[0042] Figure 10 This is a schematic diagram of another type of air duct housing according to the present invention;

[0043] Figure 11 This is a utility model Figure 10 An enlarged schematic diagram at point D;

[0044] Figure 12 This is a utility model Figure 11 A diagram from another angle.

[0045] in,

[0046] 1. Outer shell; 11. Air outlet; 2. Duct shell; 21. Volute structure; 211. Basic volute section; 2111. First guide rib; 2112. First guide groove; 2113. First windward surface; 2114. First air guide surface; 212. End volute section; 2121. Second guide rib; 21211. High-position guide rib; 21212. Low-position guide rib; 2122. Second guide groove; 2123. Second windward surface; 2124. Second air guide surface; 213. Baffle plate; 3. Cross-flow fan. Detailed Implementation

[0047] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0048] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0049] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0050] like Figures 1 to 12As shown, an embodiment of this utility model provides an air conditioner. This embodiment is described using a wall-mounted air conditioner as an example.

[0051] The air conditioner includes a duct housing 2 and a cross-flow fan 3. The duct housing 2 has a fan cavity formed along the length of the air conditioner, and the cross-flow fan 3 has a certain extension length and is disposed in the fan cavity along the length direction.

[0052] The duct housing 2 includes a volute structure 21 arranged along its length. The volute structure 21 includes a base volute section 211 and an end volute section 212, both corresponding to the cross-flow fan 3. The end volute section 212 is connected to at least one end of the base volute section 211 along its length. The end volute section 212, corresponding to at least one end of the cross-flow fan 3, optimizes airflow at the end of the duct housing 2 to address backflow and surging noise issues that easily occur after airflow passes through this area.

[0053] The volute tongue structure 21 includes a windward surface and a guide surface connected in sequence along the airflow direction. When the axial flow fan 3 rotates and generates airflow, the airflow first flows through the starting end of the volute tongue structure 21, and then flows along the volute tongue structure 21 to the end. Guided by the end of the volute tongue structure 21, the airflow flows towards the air outlet 11 of the outer casing 1.

[0054] Specifically, the basic volute tongue segment 211 has a first windward surface 2113 and a first air guide surface 2114, and the end volute tongue segment 212 has a second windward surface 2123 and a second air guide surface 2124. The specific shapes and structures of the first windward surface 2113 and the first air guide surface 2114, and the second windward surface 2123 and the second air guide surface 2124 can be adjusted according to actual design requirements, such as changing their tilt angle, curved surface shape, etc., to adapt to different airflow guidance requirements.

[0055] In the first embodiment, the basic volute tongue segment 211 is provided with a plurality of first guide ribs 2111, and the end volute tongue segment 212 is provided with a plurality of second guide ribs 2121. At least a portion of the second guide ribs 2121 protrudes beyond the first guide ribs 2111. The first guide ribs 2111 and the second guide ribs 2121 extend along the airflow direction.

[0056] In this embodiment, the cross-flow fan 3 generates airflow that blows towards the base volute section 211 and the end volute section 212. Since at least a portion of the second guide ribs 2121 on the end volute section 212 protrude from the first guide ribs 2111 on the base volute section 211, the gap between the end volute section 212 and the cross-flow fan 3 is reduced. When the airflow blows towards the end volute section 212, these protruding second guide ribs 2121 can exert a stronger guiding effect on the local airflow, thereby increasing the outlet velocity at the gap between the end volute section 212 and the cross-flow fan 3. The rapidly flowing airflow can suppress the backflow phenomenon that might otherwise form near the end region of the duct housing 2, allowing the airflow to exit more smoothly from the outlet 11, thus reducing the surging noise caused by backflow.

[0057] The second embodiment is that, in the direction of airflow, the starting end of the end volute tongue segment 212 is located downstream of the starting end of the basic volute tongue segment 211 (see [reference]). Figures 5 to 6 , Figures 8 to 9 as well as Figures 11 to 12 ).

[0058] In this embodiment, the cross-flow fan 3 generates airflow that blows towards the base volute section 211 and the end volute section 212. Since the starting end of the end volute section 212 is located downstream of the starting end of the base volute section 211, the end volute section 212 is shorter than the base volute section 211. This allows the airflow to pass more concentratedly through the gap between the end volute section 212 and the cross-flow fan 3. The concentrated airflow increases the outlet velocity at this gap, effectively preventing backflow at the air outlet 11 near the end of the duct housing 2 and reducing the generation of breathing noise.

[0059] In the third embodiment, along the airflow direction, the basic volute tongue section 211 is provided with a plurality of first guide ribs 2111, and the end volute tongue section 212 is provided with a plurality of second guide ribs 2121. At least a portion of the second guide ribs 2121 protrudes beyond the first guide ribs 2111. In the airflow direction, the starting end of the end volute tongue section 212 is located downstream of the starting end of the basic volute tongue section 211. The first guide ribs 2111 and the second guide ribs 2121 extend along the airflow direction.

[0060] This embodiment has the beneficial effects of both the first and second embodiments, and can further reduce the backflow in the area near the end of the air outlet 11 and the surging noise caused by backflow.

[0061] In the second and third embodiments described above, the starting end is the end of the windward surface that first contacts the airflow. The end of the end volute segment 212 is flush with the end of the basic volute segment 211 along its length.

[0062] In the direction of airflow, the starting end of the second windward surface 2123 is located downstream of the starting end of the first windward surface 2112. The angle between the radial connection line of the starting end of the second windward surface 2123 through the axis of the axial fan 3 and the radial connection line of the starting end of the first windward surface 2122 through the axis of the axial fan 3 is greater than 0 and less than or equal to 20°. When the angle is greater than 20°, the second windward surface 2123 will be too short in the direction of airflow, resulting in a poorer air outlet effect.

[0063] That is, in the direction of airflow, the extension length of the second windward surface 2123 is less than the extension length of the first windward surface 2113, the extension length of the second air guide surface 2124 is the same as the extension length of the first air guide surface 2114, and the two ends of their extension directions are aligned in the length direction.

[0064] The basic volute tongue segment 211 is integrally connected to the end volute tongue segment 212, or the basic volute tongue segment 211 is detachably connected to the end volute tongue segment 212.

[0065] like Figures 4 to 12 As shown, where Figure 4 , Figure 7 and Figure 10 This is a downward viewing angle from above the air duct housing. The specific arrangement of the first guide rib 2111 and the second guide rib 2121 includes:

[0066] The second guide rib 2121 includes a high guide rib 21211 and a low guide rib 21212.

[0067] One configuration option is, such as Figures 4 to 6 As shown, the high-position guide rib 21211 is located in the middle region of the end volute segment 212.

[0068] Another configuration is (not shown in the figure), in which the high-level guide rib 21211 is located in the edge region of the end volute segment 212 away from the base volute segment 211.

[0069] Another configuration option is, such as Figures 7 to 12 As shown, the high-position guide rib 21211 is located in the middle region of the end volute segment 212 and in the edge region of the end volute segment 212 away from the base volute segment 211.

[0070] In the above scheme, the high-position guide rib 21211 protrudes from the low-position guide rib 21212 and the first guide rib 2111. The high-position guide rib 21211 regulates the airflow in the middle region of the end volute tongue section 212 and / or the edge region near the end of the air duct housing 2, reducing airflow backflow at the air outlet 11 near the end of the air duct housing 2.

[0071] The first guide rib 2111 is spaced apart along the length of the basic volute segment 211. The lower guide rib 21212 is spaced apart along the length of the end volute segment 212, and the higher guide rib 21211 is spaced apart along the length of the end volute segment 212.

[0072] It should be noted that the extent to which the high-position guide rib 21211 protrudes beyond the low-position guide rib 21212 and the first guide rib 2111 can be adjusted according to actual design requirements, as long as it can achieve more effective guidance of airflow.

[0073] The high-level guide rib 21211 of this invention is disposed in the middle region of the end volute segment 212 and / or the edge region away from the base volute segment 211. These regions are typically where airflow is prone to turbulence and backflow. The high-level guide rib 21211 protrudes from the low-level guide rib 21212 and the first guide rib 2111. When the airflow passes through the end volute segment 212, it can more effectively concentrate the airflow, increase the outlet air velocity of the gap between the end volute segment 212 and the cross-flow fan 3, and the rapid outlet airflow can better suppress the occurrence of backflow.

[0074] The first guide rib 2111 is wholly or partially disposed on the first windward surface 2113, so that the first guide rib 2111 combs the airflow in the region of the basic volute tongue section 211 on the first windward surface 2113. The high-position guide rib 21211 and the low-position guide rib 21212 are at least partially disposed on the second windward surface 2123, that is, the high-position guide rib 21211 and the low-position guide rib 21212 are disposed on the second windward surface 2123, or disposed on the second windward surface 2123 and the second air guiding surface 2124. The portion of the high-position guide rib 21211 on the second windward surface 2123 protrudes beyond the first guide rib 2111.

[0075] Wherein, the lower guide rib 21212 is higher than the first guide rib 2111, or the second guide rib 2121 is set at the same height as the first guide rib 2111.

[0076] In this embodiment, because the high-position guide rib 21211 protrudes from the first guide rib 2111 on the second windward surface 2123, the protruding part blocks and guides the airflow, so that the airflow can more effectively adjust its direction and increase its outlet speed when passing the second windward surface 2123, effectively suppressing the occurrence of backflow.

[0077] Alternatively, the high-position guide rib 21211 and the low-position guide rib 21212 are only provided on the second air guide surface 2124, and the high-position guide rib 21211 protrudes from the first air guide surface 2114 of the basic volute tongue section 211.

[0078] In this embodiment, the high-position guide rib 21211 protrudes from the first guide surface 2114 on the second guide surface 2124, which strengthens the airflow in the end area, increases the air outlet speed at the second guide surface 2124 of the end volute segment 212, and more effectively suppresses the occurrence of backflow, thereby improving the overall air outlet effect of the air conditioner.

[0079] In a preferred embodiment, all of the first guide ribs 2111 are disposed on the first windward surface 2113. The high-position guide ribs 21211 and the low-position guide ribs 21212 extend from the second windward surface 2123 to the second air guiding surface 2124. The portion of the high-position guide ribs 21211 on the second air guiding surface 2124 protrudes from the first air guiding surface 2114.

[0080] In this embodiment, the high-position guide ribs 21211 and low-position guide ribs 21212 extend from the second windward surface 2123 to the second air guiding surface 2124, forming a continuous guide structure. This reduces the turbulence that may occur when the airflow transitions between different surfaces and improves the efficiency of airflow guidance. Furthermore, the portion of the high-position guide rib 21211 on the second air guiding surface 2124 protrudes beyond the first air guiding surface 2114, resulting in a stronger lifting effect on the airflow in the end region. This increases the air outlet velocity at the second air guiding surface 2124 of the end volute segment 212, more effectively suppressing backflow and thus improving the overall air outlet effect of the air conditioner.

[0081] The second windward surface 2123 and the second air guide surface 2124 form an angle and are connected by a rounded transition. Along the airflow direction, the height of the high-position guide rib 21211 and the low-position guide rib 21212 gradually increases on the second windward surface 2123 and gradually decreases on the second air guide surface 2124.

[0082] The included angle α1 between the second windward surface 2123 and the second air-guiding surface 2124 can be adjusted according to actual design requirements and is not necessarily a fixed angle. The included angle α2 between the first windward surface 2113 and the first air-guiding surface 2114 is the same as the included angle α1. Preferably, the included angles α1 and α2 are acute angles.

[0083] That is, the high-position guide rib 21211 and the low-position guide rib 21212 are set on the entire second windward surface 2123 and the end of the second air guiding surface 2124 near the cross-flow fan 3. By protruding the high-position guide rib 21211 on these two parts of the structure, the gap between them and the cross-flow fan 3 can be reduced, and the overall air outlet speed at the gap can be increased.

[0084] The portion of the lower guide rib 21212 on the second windward surface 2123 extends at the same height as the first guide rib 2111. In the airflow direction, the starting end of the higher guide rib 21211 protrudes beyond the starting end of the lower guide rib 21212, and the end of the higher guide rib 21211 on the second windward surface 2123 protrudes beyond the end of the lower guide rib 21212 on the second windward surface 2123. That is, at any point along the airflow direction, the higher guide rib 21211 protrudes beyond the corresponding lower guide rib 21212 along its length.

[0085] A first guide groove 2112 is formed between the first guide ribs 2111, and the first guide groove 2112 is recessed on the first windward surface 2113. When the airflow flows through the basic volute section 211 along the flow direction, part of it enters the first guide groove 2112. When it reaches the end of the first guide groove 2112, it flows towards the groove opening, then passes the connection between the first windward surface 2113 and the first air guide surface 2114, and then flows towards the air outlet 11 under the guidance of the first air guide surface 2114. This reduces the disordered flow and collision of the airflow in the basic volute section 211, reduces the energy loss of the airflow, and improves the flow efficiency of the airflow in the basic volute section 211.

[0086] A second guide groove 2122 is formed between the second guide ribs 2121, and the second guide groove 2122 extends from the second windward surface 2123 to the second windward surface 2124.

[0087] When the airflow passes through the end volute section 212 along the flow direction, part of the airflow, guided by the protruding high-level guide rib 21211, flows out along the gap between the cross-flow fan 3 and the high-level guide rib 21211, increasing the airflow velocity; part of the airflow enters the second guide groove 2122 and flows directly out from the second guide surface 2124 along the second guide groove 2122, allowing the airflow to flow continuously on different surfaces of the end volute section 212, avoiding turbulence and backflow at the surface transition, making the airflow smoother and further improving the airflow velocity and volume. When it flows to the end of the first guide groove 2112, it flows towards the groove opening, then crosses the connection between the first windward surface 2113 and the first guide surface 2114, and then flows towards the air outlet 11 under the guidance of the first guide surface 2114.

[0088] The extension length of the high-position guide rib 21211 is greater than the extension length of the low-position guide rib 21212, which facilitates a smooth transition connection with the second air guide surface 2124. At the same time, the extension length of the second guide groove 2122 between the high-position guide ribs 21211 is greater than the extension length of the second guide groove 2122 between the low-position guide ribs 21212, allowing for smoother airflow in the second guide groove 2122.

[0089] like Figures 10 to 12 As shown, the volute structure 21 also includes a baffle plate 213 disposed between two adjacent high-level guide ribs 21211. The baffle plate 213 is used to block the second guide groove 2122 between the high-level guide ribs 21211.

[0090] In this embodiment, the high-level guide rib 21211 protrudes from the first guide rib 2111, reducing the gap between the cross-flow fan 3 and the volute structure 21. A baffle 213 is provided in the second guide groove 2122 between the high-level guide ribs 21211. When the airflow passes through, part of the airflow is blocked by the baffle 213 and the high-level guide rib 21211 and guided to flow into the gap, increasing the air outlet speed. Part of the airflow flows out continuously through the first guide groove 2112 between the low-level guide ribs 21212 and the second guide groove 2122 between the low-level guide ribs 21212 and the high-level guide rib 21211, improving the air outlet effect.

[0091] The wind baffle 213 is vertically disposed on the bottom wall of the second guide channel 2122 and on the side wall at the highest point of the high guide rib 21211, completely sealing the deepest part of the second guide channel 2122.

[0092] Furthermore, the cross-flow fan 3 includes a rotor section and a segmented plate. The segmented plate is spaced along the length direction, dividing the cross-flow fan 3 into multiple rotor sections along its length direction, and connecting adjacent rotor sections.

[0093] The end volute segment 212 is at least partially disposed opposite to the outermost impeller segment in the length direction of the cross-flow fan 3. Specifically, a first region is formed between the end sidewall of the duct housing 2 and the adjacent segment plate, and the end volute segment 212 is disposed opposite to the first region to improve the air outlet velocity and air volume in this region, reduce the backflow at the air outlet 11 near the end of the duct housing 2, and reduce the breathing noise caused by backflow.

[0094] Preferably, the low-position guide rib 21212 is disposed at both ends of the end volute segment 212, and the high-position guide rib 21211 is disposed in the middle region of the end volute segment 212.

[0095] The two ends of the volute tongue structure 21 can be provided with end volute tongue segments 212 of the same structure, or different schemes of end volute tongue segments 212 can be adopted.

[0096] The wall-mounted air conditioner unit includes an evaporator, a cross-flow fan 3, and a filter screen, all located inside the outer casing 1. The evaporator is situated in the central area of ​​the outer casing 1, absorbing indoor heat during cooling and releasing heat during heating via a four-way valve. The cross-flow fan 3 is located behind or to the side of the evaporator, drawing in air from the air inlet at the top or front of the outer casing 1, processing it through the evaporator, and then blowing it out through the air outlet 11 of the outer casing 1, forming an airflow path. The filter screen covers the air inlet of the outer casing 1, filtering dust and impurities, protecting the evaporator, and improving air quality; it requires regular cleaning and maintenance. Optionally, the wall-mounted air conditioner unit also includes a baffle plate 213, located at the air outlet 11 of the outer casing 1, which can automatically move to close or open the air outlet 11.

[0097] The air conditioner also includes an outdoor unit. The outdoor unit is typically installed outdoors and works in conjunction with the wall-mounted unit to regulate the indoor environment.

[0098] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, 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, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0099] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air conditioner, characterized in that, include: The air duct casing has a fan cavity formed along the length of the air conditioner. A cross-flow fan is installed inside the fan cavity; The duct housing includes a volute structure arranged along its length. The volute structure includes a base volute section and an end volute section, both of which are corresponding to the cross-flow fan. The end volute section is connected to at least one end of the base volute section along its length. The basic volute tongue segment is provided with a plurality of first guide ribs, and the end volute tongue segment is provided with a plurality of second guide ribs, at least a portion of the second guide ribs protruding from the first guide ribs; And / or, in the direction of airflow, the starting end of the end volute segment is located downstream of the starting end of the base volute segment.

2. The air conditioner according to claim 1, characterized in that, The second guide rib includes a high guide rib and a low guide rib. The high guide rib is located in the middle region of the end volute segment and / or the edge region of the end volute segment away from the base volute segment, and the high guide rib protrudes from the low guide rib and the first guide rib.

3. The air conditioner according to claim 2, characterized in that, The basic volute tongue section is provided with a first windward surface and a first air guide surface in sequence along the airflow direction, and the end volute tongue section is provided with a second windward surface and a second air guide surface in sequence along the airflow direction. The first guide rib is disposed on the first windward surface, and the high-position guide rib and the low-position guide rib are at least partially disposed on the second windward surface, with the portion of the high-position guide rib on the second windward surface protruding beyond the first guide rib.

4. The air conditioner according to claim 3, characterized in that, The high-position guide rib and the low-position guide rib extend from the second windward surface to the second air guide surface, and the portion of the high-position guide rib on the second air guide surface protrudes from the first air guide surface.

5. The air conditioner according to claim 3, characterized in that, The second windward surface and the second air guide surface form an angle and are connected by a rounded transition. Along the airflow direction, the height of the high-position guide rib and the low-position guide rib gradually increases on the second windward surface and gradually decreases on the second air guide surface.

6. The air conditioner according to any one of claims 3-5, characterized in that, The portion of the low-position guide rib on the second windward surface extends at the same height as the first guide rib; in the airflow direction, the starting end of the high-position guide rib protrudes beyond the starting end of the low-position guide rib.

7. The air conditioner according to any one of claims 3-5, characterized in that, A first guide groove is formed between the first guide ribs, and the first guide groove is recessed on the first windward surface; A second guide groove is formed between the second guide ribs, and the second guide groove extends from the second windward surface to the second air guide surface.

8. The air conditioner according to claim 7, characterized in that, The extension length of the second guide groove between the high-position guide ribs is greater than the extension length of the first guide groove between the low-position guide ribs.

9. The air conditioner according to any one of claims 2-5, characterized in that, The volute structure also includes a baffle plate disposed between two adjacent high-level guide ribs, the baffle plate being used to block the second guide groove between the high-level guide ribs.

10. The air conditioner according to any one of claims 1-5, characterized in that, The cross-flow fan includes a rotor section and segmented plates, which are spaced apart along the length direction and connected between adjacent rotor sections; A first region is formed between the end sidewall of the air duct housing and the adjacent segment plate, and the end volute segment is disposed opposite to the first region.

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