Wall-mounted air conditioner indoor unit

Abstract

The application relates to the technical field of household appliances, in particular to a wall-mounted air conditioner indoor unit which comprises a casing, a volute, a heat exchange fan, a flow dividing plate and a flow guide piece. The flow guide piece is configured to guide the airflow direction of the air flowing out of an air outlet end. The flow guide piece has a first flow guide position. The air outlet end of the volute comprises an upper volute tongue and a lower casing. The upper volute tongue gradually inclines upward in the direction from the back side of the casing to the front side, and the upper volute tongue has a convex structure facing the second air outlet channel. The lower casing gradually inclines downward in the direction from the back side of the casing to the front side, and the upper volute tongue and the lower casing form the air outlet end. When the flow guide piece rotates to a position close to the upper volute tongue, the flow guide piece is located in the first flow guide position, and the flow guide piece has a gap with the upper volute tongue. The convex structure is configured to prevent the airflow of the heat exchange fan from entering the gap. The application can prevent the airflow from generating vibrational whistling sound through the gap and leaking from the gap, and realizes downward air outlet with no noise and high air volume.

Description

Technical Field

[0001] This application relates to the field of home appliance technology, and in particular to a wall-mounted air conditioner indoor unit. Background Technology

[0002] An air conditioner, also known as an air conditioner, is a device that uses artificial means to regulate and control parameters such as temperature, humidity, and airflow of the air inside a building or structure.

[0003] Currently, more and more people are choosing to install air conditioners indoors to regulate the temperature of the indoor air. Wall-mounted air conditioners, one of the many types of air conditioners, have become the first choice for most families due to their flexible installation location, high cost-effectiveness, and wide applicability.

[0004] In existing technology, wall-mounted air conditioner indoor units achieve bidirectional airflow by setting up upper and lower air outlets. The bidirectional airflow forms an enveloping airflow, allowing the air conditioning air to fully mix and exchange heat with the indoor air. However, when the air conditioner only achieves lower airflow, due to the small movement gap between the air guide plate and the volute tongue in the air duct, when the airflow reaches this gap, it will both pass through the gap and produce a whistling sound, and the airflow will also leak from the gap, resulting in a reduction in the air volume of the lower outlet. Utility Model Content

[0005] This application discloses a wall-mounted air conditioner indoor unit that prevents airflow from passing through gaps and producing a vibrating whistling sound, and also prevents leakage from gaps, achieving noiseless, high-volume downward airflow.

[0006] To achieve the above objectives, this application discloses a wall-mounted air conditioner indoor unit, comprising: The housing, wherein the housing is provided with: Air inlet; The first air outlet is located at the top of the front side of the housing; The second air outlet, at least a portion of which is located at the bottom of the housing; A volute is disposed inside the housing. The volute has a heat exchange air duct inside, which has an air inlet and an air outlet. The air inlet is connected to the air inlet. A heat exchange fan is installed inside the heat exchange duct. The heat exchange fan drives the airflow by rotating itself, so that the air enters the heat exchange duct through the air inlet and the air inlet end, and the air flows out of the heat exchange duct through the air outlet end. A diverter plate is disposed on the front side of the volute. The diverter plate and the volute form a first air outlet channel and a second air outlet channel located below the first air outlet channel. The first air outlet channel is connected between the air outlet end and the first air outlet, and the second air outlet channel is connected between the air outlet end and the second air outlet. A flow guide is disposed within the housing and located between the volute and the splitter plate. The flow guide is configured to guide the airflow direction of the air flowing out from the air outlet. The flow guide can rotate relative to the housing to different flow guide positions so that at least one of the first air outlet channel and the second air outlet channel is connected to the heat exchange air duct. The flow guide has a first flow guide position. When the flow guide is located at the first flow guide position, the second air outlet channel is connected to the air outlet, and the flow guide closes the first air outlet channel. The air outlet end of the volute includes: The upper volute tongue gradually tilts upward in the direction from the rear side to the front side of the housing, and the upper volute tongue has a protruding structure facing the second air outlet channel; The lower housing gradually slopes downwards in the direction from the rear side to the front side of the housing, and the air outlet is formed between the upper volute tongue and the lower housing; When the guide element rotates to a position close to the upper volute tongue, the guide element is located at the first guide position, and there is a gap between the guide element and the upper volute tongue. The protruding structure is configured to prevent the airflow of the heat exchange fan from entering the gap.

[0007] Thus, the guide element, positioned between the volute and the distributor plate, is a rotatable airflow switch relative to the casing. By rotating to different guide positions, it controls the opening and closing of the two air outlet channels, guiding the airflow direction from the volute outlet end and enabling at least one of the first air outlet channels to connect with the heat exchange duct. When the guide element rotates to the first guide position near the upper volute tongue, it closes the first air outlet channel, allowing only the second air outlet channel to connect with the volute outlet end, and all airflow is directed to the second air outlet at the bottom.

[0008] When the guide element is in the first guide position, there is a gap between the guide element and the upper volute tongue. The protruding structure of the upper volute tongue can prevent the airflow of the heat exchange fan from entering the gap, so that the airflow will not pass through the gap and produce a vibrating whistling sound, nor will it leak from the gap. This ensures that all the airflow driven by the heat exchange fan can enter the second air outlet channel, achieving noiseless and high-volume downward air outlet.

[0009] This application also provides a wall-mounted air conditioner indoor unit, wherein when the air guide is located at the first air guide position, the air guide has a first end near the upper volute tongue, and the apex of the protrusion structure is located below the tangent from the first end to the heat exchange fan.

[0010] Thus, by positioning the apex of the protruding structure below the tangent, closer to the second air outlet channel, its shape guides the airflow from the heat exchange fan, deflecting it away from the gap between the guide and the upper volute and directing it towards the lower second air outlet channel. The protruding structure itself increases the local thickness on the upper volute side, reducing the airflow inlet angle at the gap. Combined with its positioning below the tangent, this makes it difficult for airflow to enter the gap area, fundamentally preventing the whistling sound caused by airflow penetrating the gap, and simultaneously preventing airflow leakage.

[0011] This application also provides a wall-mounted air conditioner indoor unit, wherein the protruding structure is an arc-shaped portion formed by the upper volute tongue protruding outward toward the second air outlet channel.

[0012] Thus, the arc-shaped part is a curved surface structure formed by the upper volute tongue bending and protruding towards the second air outlet channel. It has a continuous and smooth curvature, without sharp edges or abrupt turns. The curved surface of the arc-shaped part can guide the airflow to transition smoothly along the tangential direction. When the airflow flows out from the heat exchange fan, it will naturally deflect downward along the curved surface of the arc-shaped part and then merge into the second air outlet channel, reducing the energy loss generated by local vortices.

[0013] This application also provides a wall-mounted air conditioner indoor unit, wherein the vertical distance between the first end and the vertex of the protruding structure along the vertical direction is d, 1mm≤d≤4mm.

[0014] If the vertical distance d between the first end and the vertex of the protruding structure is less than 1mm, the vertex of the protruding structure will rise, which may result in poor blocking effect of the protruding structure and increase the risk of airflow blowing into the gap; if d > 4mm, the vertex of the protruding structure will move downward, making the upper volute tongue more inclined from the rounded corner near the heat exchange fan to the guide surface of the protruding structure, the airflow will be more downward, the air outlet resistance will increase, and the overall air volume will be affected.

[0015] Therefore, in order to achieve a better blocking effect of the protruding structure without affecting the air volume of the whole machine, the vertical distance d between the first end and the vertex of the protruding structure is set to 1mm≤d≤4mm, which can ensure the blocking effect of the protruding structure without affecting the air volume of the whole machine.

[0016] This application also provides a wall-mounted air conditioner indoor unit, wherein the shortest distance between the first end and the upper volute tongue is a, and 3mm≤a≤4mm.

[0017] Since the shortest distance 'a' between the first end and the upper volute tongue needs to ensure the movement clearance of the guide plate, when the shortest distance 'a' between the first end and the upper volute tongue is less than 3mm, it is easy for the guide plate to cause movement interference during rotation. If 'a' is greater than 4mm, the upper volute shell will need to move upward, interfering with the water receiving structure between the evaporator and the evaporator, which is not conducive to spatial arrangement.

[0018] In this way, while ensuring that the guide plate has a suitable movement clearance, the arrangement of components inside the volute will not be affected. Setting the shortest distance 'a' between the first end and the upper volute tongue to 3mm≤a≤4mm ensures that the movement clearance of the guide plate is maintained and that there is no interference with the water contact structure between the guide plate and the evaporator.

[0019] This application also provides a wall-mounted air conditioner indoor unit, wherein the upper volute includes a first rounded corner and a first extension segment connected to each other, the first rounded corner is located close to the heat exchange fan, and the angle between the tangential extension direction of the first end to the heat exchange fan and the extension direction of the first extension segment is c, where 4°≤c≤8°.

[0020] The upper volute includes a first rounded corner near the heat exchange fan and a first extension connecting the first rounded corner and the protruding structure. If the angle c between the tangential extension direction of the first end to the heat exchange fan and the extension direction of the first extension is less than 4°, the apex of the protruding structure will rise, which may result in poor blocking effect of the protruding structure and increase the risk of airflow blowing into the gap. If c > 8°, the apex of the protruding structure will move downward, making the guide surface of the protruding structure more inclined after the upper volute comes out from the rounded corner near the heat exchange fan, the airflow is more downward, the air outlet resistance increases, and the overall air volume is affected.

[0021] Therefore, in order to achieve a better blocking effect of the protruding structure without affecting the air volume of the whole machine, the angle c between the tangential extension direction of the first end to the heat exchange fan and the extension direction of the first extension section is set to 4°≤c≤8°, which can ensure the blocking effect of the protruding structure without affecting the air volume of the whole machine.

[0022] This application also provides a wall-mounted air conditioner indoor unit, wherein the distance from the end of the first extension near the first rounded corner to the vertex of the protruding structure is b, and 14mm≤b≤18mm.

[0023] If the distance b from the end of the first extension section near the first rounded corner to the apex of the protruding structure is less than 14mm, the upper volute tongue will travel too short a distance from the first rounded corner, affecting the airflow of the heat exchange fan; if b > 18mm, the upper volute tongue will travel too long a distance from the first rounded corner, affecting the movement position of the guide plate and making it unfavorable for spatial arrangement.

[0024] Thus, in order to ensure that the distance from the end of the first extension section near the first rounded corner to the apex of the raised structure does not affect the overall airflow and the movement of the guide vane, the distance b from the end of the first extension section near the first rounded corner to the apex of the raised structure is set to 14mm≤b≤18mm. This ensures that the movement position of the guide vane is not interfered with while not affecting the airflow of the heat exchange fan.

[0025] This application also provides a wall-mounted air conditioner indoor unit, wherein when the second air outlet channel and the air outlet end are connected, the guide member and the volute form part of the air duct wall of the second air outlet channel, and the side of the guide member facing the second air outlet channel has a first guide surface, and the distance between the first guide surface and the volute gradually decreases along the airflow direction, so that the guide member and the volute form an air duct section with a gradually narrowing cross section.

[0026] This increases the airflow velocity of the second air outlet duct and the second air outlet, which in turn increases the airflow velocity when the air is vented downwards. This helps to prevent the airflow from being drawn back by the negative pressure inside the heat exchange fan, thereby not only increasing the amount of air delivered into the room and enhancing the heat exchange efficiency of the indoor unit, but also helping to avoid wind resistance problems.

[0027] This application also provides a wall-mounted air conditioner indoor unit, wherein the air guide member has a second air guide surface on the side facing the second air outlet channel, the second air guide surface is connected to the downstream of the first air guide surface along the airflow direction, and the distance between the second air guide surface and the volute gradually increases along the airflow direction.

[0028] Thus, when the accelerated airflow passes through the duct section between the second guide surface and the volute, the high-speed airflow accelerated by the contraction section can smoothly transition, avoiding the eddies and impact losses that are easily generated if the duct cross-section suddenly expands. This allows the airflow kinetic energy to be slowly converted into pressure energy, preventing airflow turbulence caused by a sudden drop in flow velocity and maintaining a stable delivery state of the airflow after acceleration. This ensures that the increased wind speed when the air is discharged alone does not decrease significantly, continuously counteracting the internal negative pressure back suction of the heat exchange fan 3 and ensuring effective airflow.

[0029] This application also provides a wall-mounted air conditioner indoor unit, wherein the air guide further has a second air guide position and a third air guide position; When the guide element is located at the second guide position, the first air outlet channel is connected to the air outlet end, and the guide element closes the second air outlet channel; When the air guide is located at the third air guide position, both the first air outlet channel and the second air outlet channel are connected to the air outlet end.

[0030] In this way, on the one hand, the indoor unit of the air conditioner can flexibly switch between three modes: single downward air outlet, single upward air outlet, and simultaneous upward and downward air outlet, which can accurately match the user needs in different scenarios. For example, in summer cooling, single upward air outlet can avoid cold air blowing directly on people; in winter heating, single downward air outlet can help hot air sink and cover the whole room; and in spring and autumn, simultaneous upward and downward air outlet can achieve rapid and uniform adjustment of indoor temperature, greatly improving the user's comfort.

[0031] Compared with the prior art, the beneficial effects of this application are as follows: In this application, the air guide is disposed between the volute and the diverter plate. It is an airflow switch that can rotate relative to the casing. By rotating to different air guide positions, it controls the opening and closing of the two air outlet channels, guiding the direction of the airflow flowing out of the volute's air outlet end, and realizing the connection between the first air outlet channel and at least one of the first air outlet channels and the heat exchange air duct. When the air guide is rotated to the first air guide position near the upper volute tongue, the air guide closes the first air outlet channel, allowing only the second air outlet channel to connect with the volute's air outlet end, and all the airflow is directed to the second air outlet at the bottom.

[0032] When the guide is in the first guide position, there is a gap between the guide and the upper volute tongue. By constructing the upper volute tongue to prevent the airflow of the heat exchange fan from entering the gap, the airflow will not pass through the gap and produce a vibrating whistling sound, nor will it leak from the gap. This ensures that all the airflow driven by the heat exchange fan can enter the second air outlet channel, achieving noiseless, high-volume downward air outlet. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in 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.

[0034] Figure 1 This is one of the cross-sectional views of the wall-mounted air conditioner indoor unit provided in the embodiments of this application when it is in the form of a single downward air outlet; Figure 2 This is the second cross-sectional view of the wall-mounted air conditioner indoor unit provided in the embodiments of this application when it is in the form of a single downward air outlet; Figure 3 yes Figure 2 One of the magnified views of point A in the image; Figure 4 yes Figure 2 The second enlarged view of point A in the image; Figure 5 yes Figure 2 The third enlarged view of point A in the image; Figure 6 yes Figure 2Part 4 of the enlarged view of point A in the image; Figure 7 yes Figure 2 The fifth enlarged view of point A in the image; Figure 8 This is a schematic diagram of the air guide component of the wall-mounted air conditioner indoor unit provided in the embodiments of this application; Figure 9 This is a cross-sectional view of the indoor unit of the wall-mounted air conditioner provided in this application embodiment when the air is discharging from the top and bottom; Figure 10 This is a cross-sectional view of the wall-mounted air conditioner indoor unit provided in this application embodiment when it is in the form of a single top air outlet.

[0035] Explanation of reference numerals in the attached figures: 1-Casing; 11-Air inlet; 12-First air outlet; 13-Second air outlet; 14-Diverter plate; 2-Volume; 21-Heat exchange air duct; 211-Air inlet; 212-Air outlet; 213-Upper volute tongue; 2131-First rounded corner; 2132-First extension section; 214-Lower shell; 3-Heat exchange fan; 4-First air outlet duct; 5-Second air outlet duct; 6-Flow guide; 61-First end; 62-First flow guide surface; 63-Second flow guide surface; 7-Gap; 8-Protruding structure; 81-Vertex; 9-Tangent. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0038] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0039] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0040] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0041] Before explaining the technical solution of this application, the background technology of this application shall be explained first.

[0042] Currently, more and more people are choosing to install air conditioners indoors to regulate the temperature of the indoor air. Wall-mounted air conditioners, one of the many types of air conditioners, have become the first choice for most families due to their flexible installation location, high cost-effectiveness, and wide applicability.

[0043] In existing technology, wall-mounted air conditioner indoor units achieve bidirectional airflow by setting up upper and lower air outlets. The bidirectional airflow forms an enveloping airflow, allowing the air conditioning air to fully mix and exchange heat with the indoor air. However, when the air conditioner only achieves lower airflow, due to the small movement gap between the air guide plate and the volute tongue in the air duct, when the airflow reaches this gap, it will both pass through the gap and produce a whistling sound, and the airflow will also leak from the gap, resulting in a reduction in the air volume of the lower outlet.

[0044] Based on this, this application provides a wall-mounted air conditioner indoor unit. By constructing the upper volute structure to prevent the airflow of the heat exchange fan from entering the gap, the airflow will not pass through the gap and generate a vibrating whistling sound, nor will it leak from the gap. This ensures that all the airflow driven by the heat exchange fan can enter the second air outlet channel, achieving noiseless, high-volume downward air outlet.

[0045] The following will describe specific embodiments and appendices. Figure 1 To be continued Figure 10 The technical solution of the wall-mounted air conditioner indoor unit of this application is described.

[0046] like Figure 1 and Figure 2 As shown, this application embodiment provides a wall-mounted air conditioner indoor unit, including a housing 1. The housing 1 is provided with an air inlet 11, a first air outlet 12 and a second air outlet 13. The first air outlet 12 is located at the top of the front side of the housing 1, and at least part of the second air outlet 13 is located at the bottom of the housing 1.

[0047] The casing 1 serves as the external frame of the entire unit, providing structural support and airflow. The air inlet 11 provides an entrance for indoor air to enter the air conditioner. The first air outlet 12 enables upward airflow, and the second air outlet 13 enables downward airflow. This allows for both upward and downward airflow, enriching the air outlet modes of the indoor unit and enabling it to adapt to different usage scenarios, thereby enhancing its practicality.

[0048] like Figure 1 and Figure 2 As shown, the indoor unit of the wall-mounted air conditioner also includes a volute 2, which is located inside the casing 1. The volute 2 has a heat exchange air duct 21 inside, which has an air inlet end 211 and an air outlet end 212. The air inlet end 211 is connected to the air inlet 11.

[0049] The volute 2 is a component that forms an airflow channel. Its internal structure determines the airflow direction. The heat exchange duct 21 can form sufficient heat exchange space inside the air conditioner indoor unit, ensuring that the air entering the heat exchange duct 21 through the air inlet 11 and the air inlet end 211 can fully contact the heat exchange components, ensuring that the air can fully complete the cooling or heating process, thereby improving the overall heat exchange efficiency of the air conditioner indoor unit and making the delivered air temperature more in line with user needs.

[0050] like Figure 1 and Figure 2 As shown, the indoor unit of the wall-mounted air conditioner also includes a heat exchange fan 3, which is installed in the heat exchange duct 21. The heat exchange fan 3 is used to drive the air flow by rotating itself, so that the air enters the heat exchange duct 21 through the air inlet 11 and the air inlet end 211, and the air flows out of the heat exchange duct 21 through the air outlet end 212.

[0051] The heat exchange fan 3 is installed in the heat exchange duct 21 of the volute 2 and is the power source for airflow. It generates negative pressure by rotating itself, driving indoor air to enter through the air inlet 11 and the air inlet end 211 of the heat exchange duct 21 in sequence. After completing heat exchange (cooling or heating) in the duct, it flows out from the air outlet end 212 of the volute 2, providing power for subsequent airflow distribution.

[0052] like Figure 1 and Figure 2 As shown, the indoor unit of the wall-mounted air conditioner also includes a diverter plate 14, which is disposed on the front side of the volute 2. The diverter plate 14 and the volute 2 form a first air outlet channel 4 and a second air outlet channel 5 located below the first air outlet channel 4. The first air outlet channel 4 connects the air outlet end 212 and the first air outlet 12, and the second air outlet channel 5 connects the air outlet end 212 and the second air outlet 13.

[0053] In this way, the air flowing out from the air outlet 212 can be accurately diverted, avoiding airflow turbulence caused by the random diffusion of air inside the casing 1. This ensures that the air can be directionally delivered to the corresponding first air outlet 12 and second air outlet 13 along the first air outlet channel 4 and the second air outlet channel 5, which helps to solve the problem of uneven airflow from different air outlets and mutual airflow interference when using a single air channel. It also helps to ensure the stability and independence of the airflow from each air outlet.

[0054] like Figure 1 , Figure 9 and Figure 10 As shown, the indoor unit of the wall-mounted air conditioner also includes a guide member 6, which is disposed inside the casing 1 and located between the volute 2 and the diverter plate 14. The guide member 6 is configured to guide the airflow direction of the air flowing out from the air outlet 212. The guide member 6 can rotate relative to the casing 1 to different guiding positions so that at least one of the first air outlet channel 4 and the second air outlet channel 5 is connected to the heat exchange air duct 21. The guide member 6 has a first guiding position. When the guide member 6 is in the first guiding position, the second air outlet channel 5 is connected to the air outlet 212, and the guide member 6 closes the first air outlet channel 4.

[0055] Thus, the guide element 6, positioned between the volute 2 and the diverter plate 14, is an airflow switch that can rotate relative to the housing 1. By rotating to different guide positions, it controls the opening and closing of the two air outlet channels, guiding the direction of the airflow from the air outlet end 212 of the volute 2, thereby achieving communication between the first air outlet channel 4 and at least one of the two channels and the heat exchange duct 21. When the guide element 6 rotates to the first guide position near the upper volute tongue 213, it closes the first air outlet channel 4, allowing only the second air outlet channel 5 to communicate with the air outlet end 212 of the volute 2, and all the airflow is directed to the second air outlet 13 at the bottom.

[0056] Among them, such as Figure 1 and Figure 2As shown, the air outlet 212 of the volute 2 includes an upper volute tongue 213 and a lower housing 214. The upper volute tongue 213 gradually slopes upward in the direction from the rear side to the front side of the housing 1, and has a protruding structure 8 facing the second air outlet channel 5. The lower housing 214 gradually slopes downward in the direction from the rear side to the front side of the housing 1, and the air outlet 212 is formed between the upper volute tongue 213 and the lower housing 214. When the guide member 6 rotates to a position close to the upper volute tongue 213, the guide member 6 is located in the first guide position, and there is a gap 7 between the guide member 6 and the upper volute tongue 213. The protruding structure 8 is configured to prevent the airflow of the heat exchange fan 3 from entering the gap 7.

[0057] Thus, when the guide member 6 is in the first guide position, there is a gap 7 between the guide member 6 and the upper volute tongue 213. The protruding structure 8 of the upper volute tongue 213 can prevent the airflow of the heat exchange fan 3 from entering the gap 7, so that the airflow will not pass through the gap 7 and produce a vibrating whistling sound, nor will it leak from the gap 7. This ensures that all the airflow driven by the heat exchange fan 3 can enter the second air outlet channel 5, achieving noiseless and high-volume downward air outlet.

[0058] Furthermore, when the air guide 6 is rotated to the position of closing the second air outlet 5 and opening the first air outlet 4, airflow is blown out from the first air outlet 12 at the top. This is suitable for scenarios requiring rapid adjustment of the temperature in the upper part of the room, such as summer cooling, utilizing the sinking characteristic of cold air. When the air guide 6 is in the first air guide position, airflow is blown out from the second air outlet 13 at the bottom. This is suitable for winter heating, utilizing the rising characteristic of hot air to achieve uniform heating throughout the room or to avoid cold air blowing directly on people. When the air guide 6 is rotated to open the first air outlet 4 and the second air outlet 5, airflow is blown out from the first air outlet 12 and the second air outlet 13 simultaneously, forming an enveloping airflow. This allows the air conditioning air to quickly and fully mix and exchange heat with the indoor air, avoiding uneven indoor temperature.

[0059] The shape of the housing 1 can be roughly cuboid. Of course, the housing 1 can also be other possible shapes, which are not limited in this embodiment.

[0060] In some embodiments, such as Figure 2 and Figure 3 As shown, when the flow guide 6 is in the first flow guide position, the flow guide 6 has a first end 61 near the upper volute tongue 213, and the apex 81 of the protrusion structure 8 is located below the tangent 9 from the first end 61 to the heat exchange fan 3.

[0061] Thus, the protruding structure 8 is located on the side of the upper volute 213 facing the second air outlet channel 5, that is, the surface facing the downward airflow channel. The protruding structure 8 is an extension or raised part of the upper volute 213 body. When the guide member 6 is in the first guide position, its end close to the upper volute 213 is defined as the first end 61. At this time, the guide member 6 and the upper volute 213 maintain a movement gap 7. Taking the tangent 9 from the first end 61 to the heat exchange fan 3 as the reference line, the tangent 9 can be understood as a straight line from the first end 61 of the guide member 6 to the edge of the heat exchange fan 3, representing the possible diffusion direction of the airflow when it is not guided.

[0062] Positioning the apex 81 of the protruding structure 8 below the tangent 9, closer to the second air outlet duct 5, its shape guides the airflow from the heat exchange fan 3, deflecting it away from the gap 7 between the guide member 6 and the upper volute tongue 213, and directing it towards the lower second air outlet duct 5. The protruding structure 8 itself increases the local thickness on the side of the upper volute tongue 213, reducing the airflow inlet angle at the gap 7. Combined with its positioning below the tangent 9, this makes it difficult for airflow to enter the gap 7 area, fundamentally preventing the whistling sound caused by airflow penetrating the gap 7, and simultaneously preventing airflow leakage.

[0063] By forcibly directing the airflow to the second air outlet 5, more airflow is concentrated towards the bottom air outlet, increasing the wind speed and volume of the downward airflow, enhancing the efficiency of hot air sinking during heating, or preventing direct blowing during cooling. While achieving airflow blocking, the guide 6 and the upper volute 213 still maintain a necessary movement gap 7 to avoid mechanical interference or frictional noise during rotation adjustment.

[0064] In some embodiments, such as Figure 2 and Figure 3 As shown, the protruding structure 8 is an arc-shaped part formed by the upper volute tongue 213 protruding outward toward the second air outlet channel 5.

[0065] Thus, the arc-shaped part is a curved surface structure formed by the upper volute tongue 213 bending and protruding towards the second air outlet channel 5. It has a continuous and smooth curvature, without sharp edges or abrupt turns. The curved surface of the arc-shaped part can guide the airflow to smoothly transition along the tangent 9 direction. When the airflow flows out from the heat exchange fan 3, it will naturally deflect downward along the curved surface of the arc-shaped part and then merge into the second air outlet channel 5, reducing the energy loss generated by local vortices.

[0066] The curved structure makes the pressure changes in the area through which the airflow passes more gradual, avoiding local high-pressure or low-pressure zones caused by abrupt changes in shape at protruding parts, thereby reducing the possibility of airflow vibration and further suppressing the generation of whistling sounds. When the airflow flows along the curved surface, boundary layer separation is reduced, the drag coefficient is lowered, and more wind energy is converted into effective exhaust kinetic energy, increasing the actual air volume and speed of the downward-facing air outlet. The curved structure can better disperse the stress generated by the airflow impact, reduce the fatigue deformation of the upper volute tongue 213 during long-term use, extend the service life of the component, and the smooth curved surface reduces frictional noise between the airflow and the structural surface, making the airflow more uniform, avoiding condensation caused by local low temperatures, and improving the safety of use.

[0067] In some embodiments, such as Figure 4 As shown, the vertical distance between the first end 61 and the vertex 81 of the protruding structure 8 along the vertical direction is d, 1mm≤d≤4mm.

[0068] If the vertical distance d between the first end 61 and the vertex 81 of the protruding structure 8 is less than 1 mm, the vertex 81 of the protruding structure 8 will rise, which may result in poor blocking effect of the protruding structure 8 and increase the risk of airflow blowing towards the gap 7. If d > 4 mm, the vertex 81 of the protruding structure 8 will move downward, making the upper volute tongue 213 more inclined from the rounded corner near the heat exchange fan 3 to the guide surface of the protruding structure 8, causing the airflow to be more downward, increasing the air outlet resistance and affecting the overall air volume.

[0069] Therefore, in order to achieve a better blocking effect of the protruding structure 8 without affecting the overall airflow, the vertical distance d between the first end 61 and the apex 81 of the protruding structure 8 is set to 1mm ≤ d ≤ 4mm. This ensures the blocking effect of the protruding structure 8 without affecting the overall airflow. Specifically, d can be set to 1mm, 2.5mm, or 4mm, etc., as long as the vertical distance d is within the range of 1mm ≤ d ≤ 4mm. The embodiments of this application will not be listed one by one here.

[0070] In some embodiments, such as Figure 5 As shown, the shortest distance between the first end 61 and the upper worm tongue 213 is a, 3mm≤a≤4mm.

[0071] Since the shortest distance a between the first end 61 and the upper volute tongue 213 needs to ensure the movement clearance 7 of the guide plate, when the shortest distance a between the first end 61 and the upper volute tongue 213 is less than 3mm, it is easy to cause motion interference of the guide plate during rotation. If a is greater than 4mm, the upper volute 2 will need to move upward, interfering with the water receiving structure between the evaporator, which is not conducive to spatial arrangement.

[0072] Thus, while ensuring the guide plate has a suitable movement clearance 7, the arrangement of components inside the volute 2 is not affected. Setting the shortest distance 'a' between the first end 61 and the upper volute tongue 213 to 3mm ≤ a ≤ 4mm ensures that the movement clearance 7 of the guide plate does not interfere with the water receiving structure between it and the evaporator. Specifically, 'a' can be set to 3mm, 3.5mm, or 4mm, etc., as long as the shortest distance 'a' is within the range of 3mm ≤ d ≤ 4mm. Examples of these embodiments will not be listed here.

[0073] In some embodiments, such as Figure 6 As shown, the upper volute tongue 213 includes a first rounded corner 2131 and a first extension 2132 connected to each other. The first rounded corner 2131 is located close to the heat exchange fan 3. The angle between the extension direction of the tangent 9 from the first end 61 to the heat exchange fan 3 and the extension direction of the first extension 2132 is c, where 4°≤c≤8°.

[0074] The upper volute 213 includes a first rounded corner 2131 near the heat exchange fan 3 and a first extension 2132 connecting the first rounded corner 2131 and the protrusion structure 8. If the angle c between the extension direction of the tangent 9 from the first end 61 to the heat exchange fan 3 and the extension direction of the first extension 2132 is less than 4°, the apex 81 of the protrusion structure 8 will rise, which may result in poor blocking effect of the protrusion structure 8 and increase the risk of airflow blowing towards the gap 7. If c > 8°, the apex 81 of the protrusion structure 8 will move down, making the upper volute 213 more inclined from the rounded corner near the heat exchange fan 3 to the guide surface of the protrusion structure 8, the airflow will be more downward, and the air outlet resistance will increase, affecting the overall air volume.

[0075] Thus, in order to achieve a better blocking effect for the protruding structure 8 without affecting the overall airflow, the angle c between the extension direction of the tangent 9 from the first end 61 to the heat exchange fan 3 and the extension direction of the first extension segment 2132 is set to 4°≤c≤8°. This ensures the blocking effect of the protruding structure 8 without affecting the overall airflow. Specifically, the angle c can be set to 4°, 6°, or 8°, etc., as long as the angle c is within the range of 4°≤c≤8°. The embodiments of this application will not be listed one by one here.

[0076] In some embodiments, such as Figure 7 As shown, the distance from the end of the first extension segment 2132 near the first rounded corner 2131 to the vertex 81 of the protruding structure 8 is b, 14mm≤b≤18mm.

[0077] If the distance b from the end of the first extension section 2132 near the first rounded corner 2131 to the vertex 81 of the protruding structure 8 is less than 14mm, the upper volute tongue 213 will have too short a travel distance from the first rounded corner 2131, affecting the airflow of the heat exchange fan 3; if b > 18mm, the upper volute tongue 213 will have too long a travel distance from the first rounded corner 2131, affecting the movement position of the guide plate and making it unfavorable for spatial arrangement.

[0078] Thus, to ensure that the distance from the end of the first extension segment 2132 near the first rounded corner 2131 to the vertex 81 of the protruding structure 8 does not affect the overall airflow and the movement of the guide vane, the distance b from the end of the first extension segment 2132 near the first rounded corner 2131 to the vertex 81 of the protruding structure 8 is set to 14mm ≤ b ≤ 18mm. This ensures that the movement position of the guide vane is not interfered with while maintaining the airflow of the heat exchange fan 3. Specifically, the distance b from the end of the first extension segment 2132 near the first rounded corner 2131 to the vertex 81 of the protruding structure 8 can be set to 14mm, 16mm, or 18mm, etc., as long as b is within the range of 14mm ≤ b ≤ 18mm. These embodiments will not be listed individually here.

[0079] In some embodiments, such as Figure 1 and Figure 8 As shown, when the second air outlet channel 5 and the air outlet end 212 are connected, the guide member 6 and the volute 2 form part of the air duct wall of the second air outlet channel 5, and the side of the guide member 6 facing the second air outlet channel 5 has a first guide surface 62. The distance between the first guide surface 62 and the volute 2 gradually decreases along the airflow direction, so that the guide member 6 and the volute 2 form an air duct section with a gradually narrowing cross section.

[0080] Thus, when the second air outlet channel 5 and the heat exchange air duct 21 are connected, the guide member 6 and the volute 2 form part of the air duct wall of the second air outlet channel 5. Since the distance between the first guide surface 62 of the guide member 6 facing the second air outlet channel 5 and the volute 2 gradually decreases along the airflow direction, the air duct section between the guide member 6 and the volute 2 is formed with a gradually narrowing cross section. Therefore, the air duct section between the guide member 6 and the volute 2 is equivalent to the inlet section (i.e., the contraction section) of the Venturi tube.

[0081] According to the principle of the Venturi tube, when the airflow passes through the inlet section of the Venturi tube, the airflow velocity will increase. Since the second air outlet 5 is connected to the second air outlet 13 which is at least partially located at the bottom of the casing 1, when the airflow flows into the second air outlet 5 from the air outlet end 212 of the heat exchange air duct 21, and when the airflow passes through the air duct section between the guide 6 and the volute 2, the airflow velocity will increase. This can increase the airflow velocity of the second air outlet 5 and the second air outlet 13, that is, increase the airflow velocity when the airflow is discharged from the bottom alone. This helps to prevent the airflow from being sucked back by the internal negative pressure of the heat exchange fan 3. This not only helps to increase the air volume delivered into the room and enhance the heat exchange efficiency of the indoor unit of the air conditioner, but also helps to avoid the problem of wind resistance.

[0082] In some embodiments, such as Figure 1 and Figure 8 As shown, the side of the guide member 6 facing the second air outlet channel 5 also has a second guide surface 63. The second guide surface 63 is connected to the downstream of the first guide surface 62 along the airflow direction. The distance between the second guide surface 63 and the volute 2 gradually increases along the airflow direction.

[0083] In this way, the cross-section of the air duct section between the guide member 6 and the volute 2 gradually narrows and then expands along the airflow direction, thus forming a Venturi tube structure with a "contraction section - throat - diffuser section". The diffuser section corresponds to the air duct section between the second guide surface 63 and the volute 2, and the throat corresponds to the air duct section located between the first guide surface 62 and the second guide surface 63.

[0084] According to the principle of the Venturi tube, when the accelerated airflow flows through the air duct section between the second guide surface 63 and the volute 2, it can smoothly transition the high-speed airflow accelerated by the contraction section, avoiding the eddies and impact losses that are easily generated if the cross-section of the air duct suddenly expands. This allows the airflow kinetic energy to be slowly converted into pressure energy, which can prevent airflow turbulence caused by a sudden drop in flow velocity, and maintain the stable delivery state of the airflow after acceleration. This ensures that the increased wind speed when the air is discharged alone does not decrease significantly, continuously resists the internal negative pressure back suction of the heat exchange fan 3, and ensures effective airflow.

[0085] In some embodiments, such as Figure 9 and Figure 10 As shown, the flow guide 6 also has a second flow guide position and a third flow guide position; When the guide element 6 is in the second guide position, the first air outlet channel 4 is connected to the air outlet end 212, and the guide element 6 closes the second air outlet channel 5. When the guide element 6 is in the third guide position, both the first air outlet channel 4 and the second air outlet channel 5 are connected to the air outlet end 212.

[0086] In this way, on the one hand, the indoor unit of the air conditioner can flexibly switch between three modes: single downward air outlet, single upward air outlet, and simultaneous upward and downward air outlet, which can accurately match the user needs in different scenarios. For example, in summer cooling, single upward air outlet can avoid cold air blowing directly on people; in winter heating, single downward air outlet can help hot air sink and cover the whole room; and in spring and autumn, simultaneous upward and downward air outlet can achieve rapid and uniform adjustment of indoor temperature, greatly improving the user's comfort.

[0087] On the other hand, since the three air outlet modes can be switched by adjusting the position of the single component 6, there is no need to add multiple additional air outlet structures, which further simplifies the internal structure design of the whole machine, further reduces the number of parts, reduces assembly complexity, and also reduces the risk of failure that may occur when multiple parts work together, thus improving the reliability of equipment operation.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A wall-mounted air conditioner indoor unit, characterized in that, include: The housing, wherein the housing is provided with: Air inlet; The first air outlet is located at the top of the front side of the housing; The second air outlet, at least a portion of which is located at the bottom of the housing; A volute is disposed inside the housing. The volute has a heat exchange air duct inside, which has an air inlet and an air outlet. The air inlet is connected to the air inlet. A heat exchange fan is installed inside the heat exchange duct. The heat exchange fan drives the airflow by rotating itself, so that the air enters the heat exchange duct through the air inlet and the air inlet end, and the air flows out of the heat exchange duct through the air outlet end. A diverter plate is disposed on the front side of the volute. The diverter plate and the volute form a first air outlet channel and a second air outlet channel located below the first air outlet channel. The first air outlet channel is connected between the air outlet end and the first air outlet, and the second air outlet channel is connected between the air outlet end and the second air outlet. A flow guide is disposed within the housing and located between the volute and the splitter plate. The flow guide is configured to guide the airflow direction of the air flowing out from the air outlet. The flow guide can rotate relative to the housing to different flow guide positions so that at least one of the first air outlet channel and the second air outlet channel is connected to the heat exchange air duct. The flow guide has a first flow guide position. When the flow guide is located at the first flow guide position, the second air outlet channel is connected to the air outlet, and the flow guide closes the first air outlet channel. The air outlet end of the volute includes: The upper volute tongue gradually tilts upward in the direction from the rear side to the front side of the housing, and the upper volute tongue has a protruding structure facing the second air outlet channel; The lower housing gradually slopes downwards in the direction from the rear side to the front side of the housing, and the air outlet is formed between the upper volute tongue and the lower housing; When the guide element rotates to a position close to the upper volute tongue, the guide element is located at the first guide position, and there is a gap between the guide element and the upper volute tongue. The protruding structure is configured to prevent the airflow of the heat exchange fan from entering the gap.

2. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, When the flow guide is located at the first flow guide position, the flow guide has a first end near the upper volute tongue, and the apex of the protrusion structure is located below the tangent from the first end to the heat exchange fan.

3. The wall-mounted air conditioner indoor unit according to claim 2, characterized in that, The protruding structure is an arc-shaped portion formed by the upper volute tongue protruding outward toward the second air outlet channel.

4. The wall-mounted air conditioner indoor unit according to claim 3, characterized in that, The vertical distance between the first end and the vertex of the protrusion structure along the vertical direction is d, where 1mm≤d≤4mm.

5. The wall-mounted air conditioner indoor unit according to claim 4, characterized in that, The shortest distance between the first end and the upper worm tongue is a, where 3mm ≤ a ≤ 4mm.

6. The wall-mounted air conditioner indoor unit according to claim 5, characterized in that, The upper volute tongue includes a first rounded corner and a first extension segment connected to each other. The first rounded corner is located close to the heat exchange fan. The angle between the tangential extension direction of the first end to the heat exchange fan and the extension direction of the first extension segment is c, where 4°≤c≤8°.

7. The wall-mounted air conditioner indoor unit according to claim 6, characterized in that, The distance from the end of the first extension near the first rounded corner to the vertex of the protruding structure is b, where 14mm ≤ b ≤ 18mm.

8. The wall-mounted air conditioner indoor unit according to any one of claims 1-7, characterized in that, When the second air outlet channel and the air outlet end are connected, the guide member and the volute form part of the air duct wall of the second air outlet channel, and the side of the guide member facing the second air outlet channel has a first guide surface. The distance between the first guide surface and the volute gradually decreases along the airflow direction, so that the guide member and the volute form an air duct section with a gradually narrowing cross section.

9. The wall-mounted air conditioner indoor unit according to claim 8, characterized in that, The guide member also has a second guide surface on the side facing the second air outlet channel. The second guide surface is connected to the downstream of the first guide surface along the airflow direction. The distance between the second guide surface and the volute gradually increases along the airflow direction.

10. The wall-mounted air conditioner indoor unit according to any one of claims 1-7, characterized in that, The flow guide also has a second flow guide position and a third flow guide position; When the guide element is located at the second guide position, the first air outlet channel is connected to the air outlet end, and the guide element closes the second air outlet channel; When the air guide is located at the third air guide position, both the first air outlet channel and the second air outlet channel are connected to the air outlet end.

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