Wall-mounted air conditioner indoor unit

Abstract

This application relates to the field of air conditioning technology and discloses a wall-mounted air conditioner indoor unit, including a casing, a cross-flow fan, a volute, and a volute tongue. The volute tongue and the volute casing are arranged radially spaced along the cross-flow fan. The volute tongue has a base plate, multiple volute tongue teeth, and a filling part. The base plate is located near the air outlet of the casing. The multiple volute tongue teeth are arranged axially spaced on the base plate along the cross-flow fan, and a tooth gap is formed between each pair of adjacent volute tongue teeth. The filling part is disposed in the tooth gap and has a first guide surface and a wind-blocking surface. The first guide surface is a curved surface that bulges outward from the base plate. The wind-blocking surface faces away from the air inlet end of the tooth gap. In this application, the first guide surface of the filling part guides the airflow smoothly into the cross-flow fan, and the wind-blocking surface of the filling part blocks the backflow airflow, which can alleviate the impact of the airflow, prevent airflow backflow, reduce the energy loss of the airflow, and reduce noise, thereby improving the performance of the air duct.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a wall-mounted air conditioning 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 users are choosing to install air conditioners indoors to regulate the temperature of the indoor air. Wall-mounted air conditioners are one type of air conditioner; their indoor units can be mounted on interior walls. Due to their flexible installation location, high cost-effectiveness, and wide applicability, wall-mounted air conditioners have become the first choice for most families when selecting air conditioners.

[0004] In the prior art, a wall-mounted air conditioner indoor unit has a casing, a cross-flow fan, a volute, and a volute tongue. The cross-flow fan is installed in the casing, and the volute tongue and the volute are arranged radially spaced apart along the cross-flow fan. The volute tongue includes multiple volute tongue teeth arranged side by side along the axial direction of the cross-flow fan. There are gaps between adjacent volute tongue teeth. When high-speed airflow passes through the gaps between the teeth, the flow space drops sharply, the local flow velocity increases sharply, the impact of the airflow is obvious, noise is easily generated, affecting the user experience, and backflow is also easy to occur, increasing the energy loss of the airflow and reducing the exhaust air volume of the wall-mounted air conditioner indoor unit. Utility Model Content

[0005] This application discloses a wall-mounted air conditioner indoor unit that can make the airflow enter the cross-flow fan more smoothly when the high-speed airflow passes through the volute, reduce the impact of the airflow, avoid airflow backflow, reduce the energy loss of the airflow and reduce noise, thereby improving the duct performance and increasing the exhaust air volume of the wall-mounted air conditioner indoor unit.

[0006] To achieve the above objectives, this application discloses a wall-mounted air conditioner indoor unit, comprising:

[0007] The housing has a receiving cavity and an air outlet that communicates with the receiving cavity;

[0008] A cross-flow fan, wherein the cross-flow fan is disposed in the receiving cavity of the housing;

[0009] A volute, the volute being disposed around one side of the cross-flow fan;

[0010] A volute tongue, which is radially spaced from the volute casing of the cross-flow fan, has the following characteristics:

[0011] A base plate, wherein the base plate is disposed near the air outlet of the housing;

[0012] Multiple volute teeth are spaced apart on the base plate along the axial direction of the cross-flow fan. A tooth gap is formed between each two adjacent volute teeth, and the tooth gap has an air inlet facing the air outlet of the housing.

[0013] A filling portion, wherein the filling portion is disposed in the inter-tooth gap, the filling portion having:

[0014] The first airflow guide surface is a curved surface that protrudes away from the bottom plate. The first airflow guide surface is used to guide part of the airflow at the air outlet into the cross-flow fan (10).

[0015] A windproof surface, the windproof surface facing away from the air inlet end of the tooth gap, the windproof surface is used to prevent the airflow in the tooth gap from entering the air outlet.

[0016] Thus, the first guide surface of the filling section can guide the high-speed airflow blowing directly into the inter-tooth gap. Together with the volute teeth, it can guide part of the airflow at the air outlet into the cross-flow fan, reducing the airflow entering the inter-tooth gap, improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the wall-mounted air conditioner indoor unit. The wind-blocking surface of the filling section faces away from the air inlet end of the inter-tooth gap, that is, the wind-blocking surface faces the air outlet end of the inter-tooth gap. When the airflow enters the inter-tooth gap, the flow space drops sharply, the local flow velocity increases sharply, and the impact of the airflow is obvious, which can easily generate backflow. The wind-blocking surface can prevent the backflow from flowing out from the air inlet end of the inter-tooth gap, avoiding the backflow airflow from disturbing the normal flow of airflow and affecting the normal flow of airflow, thereby improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the wall-mounted air conditioner indoor unit.

[0017] As an optional implementation, each of the cochlear teeth has:

[0018] The second guide surface is a curved surface that protrudes away from the bottom plate;

[0019] The curvature of the first guide surface is the same as that of the second guide surface.

[0020] In this way, the curvature of the first guide surface of the filling part is the same as that of the second guide surface, which allows the airflow to connect more naturally when passing through the first guide surface and the second guide surface, forming a smooth airflow transition area. This makes the airflow smoother and avoids the airflow from separating or vortexing at the volute teeth, thereby optimizing the airflow path and improving the airflow efficiency.

[0021] As an optional implementation, the first guide surface and the second guide surface are on the same curved surface.

[0022] In this way, the first and second guide surfaces can form a continuous and smooth curved surface. Since the first and second guide surfaces are on the same curved surface, the airflow can transition more smoothly when passing through the filling part and the worm tongue tooth. It will not generate eddies or airflow separation due to the sudden change of the curved surface, which further improves the flow efficiency of the airflow. Moreover, the uniform airflow distribution and smooth guide process can reduce the eddies and turbulence of the airflow in the gap between the teeth, thereby reducing the noise generated by airflow impact and friction and improving the user experience.

[0023] In one implementation, the arc length of the first guide surface is less than or equal to half the arc length of the second guide surface.

[0024] In this way, the first guide surface can be avoided from affecting the demolding process of the filling part. The arc length of the first guide surface can be equal to half the arc length of the second guide surface. This ensures that the first guide surface can be demolded smoothly while maximizing the arc length of the first guide surface, improving the flow path of the first guide surface, and thus improving the flow guiding effect of the first guide surface, so that the airflow can smoothly enter the cross-flow fan.

[0025] As an optional implementation, the first guide surface completely blocks the air inlet end of the inter-tooth gap.

[0026] In this way, high-speed airflow can be prevented from directly entering the air inlet end of the tooth gap. It can also guide part of the airflow at the air outlet into the cross-flow fan together with the volute teeth, reducing the airflow entering the tooth gap, improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the wall-mounted air conditioner indoor unit.

[0027] As an optional implementation, the first guide surface has the following characteristics:

[0028] The first chord edge is connected to the base plate and is located at the air inlet end of the tooth gap;

[0029] The second chord edge is opposite to the first chord edge and is located within the tooth gap;

[0030] The first arc edge is located within the interdental gap and is connected to a volute tongue tooth adjacent to the interdental gap where the first guide surface is located.

[0031] The second arc edge is opposite to the first arc edge and is located within the interdental gap. The second arc edge is connected to another volute tooth adjacent to the interdental gap where the first guide surface is located.

[0032] In this way, the first chord edge is connected to the base plate, and the first and second arc edges are connected to the two adjacent volute teeth respectively, which can achieve the sealing effect of the gap between the teeth. This can prevent high-speed airflow from directly entering the air inlet end of the gap between the teeth. Together with the volute teeth, it can guide part of the airflow at the air outlet into the cross-flow fan, reduce the airflow entering the gap between the teeth, improve the smoothness of airflow, reduce the energy loss of airflow, and thus increase the exhaust air volume of the indoor unit of the wall-mounted air conditioner.

[0033] As an optional implementation, the filling portion has:

[0034] An air guide trough is disposed on the windproof surface. The air guide trough has an arc-shaped groove surface, which is a concave curved surface.

[0035] In this way, the backflow generated during the airflow into the gap between the teeth can not only be blocked by the windproof surface, but also guided to the air outlet of the gap by the air guide groove set on the windproof surface. This allows more airflow in the gap to flow to the air outlet of the gap, thereby reducing the air resistance in the gap, reducing the energy loss caused by the backflow in the gap, and reducing the noise generated by the airflow directly impacting the windproof surface. This makes the airflow smoother and improves the user experience.

[0036] As an optional implementation, the arc-shaped groove surface is tangent to the surface of the base plate, and the curvature of the arc-shaped groove surface is the same as the curvature of the first guide surface.

[0037] In this way, when the airflow enters the air guide duct from the bottom plate, the airflow can smoothly transition along the tangent point without significant resistance, avoiding airflow separation or vortices caused by abrupt changes in shape, thereby reducing energy loss and noise. Furthermore, when the returning airflow moves back towards the outlet end of the tooth gap under the action of the air guide duct, the airflow direction can be consistent with the airflow direction guided by the first and second guide surfaces, further optimizing the airflow path and reducing energy loss and noise.

[0038] As an optional implementation, the diameter of the arc-shaped groove is one-fifth to one-quarter of the diameter of the first guide surface.

[0039] This avoids the situation where the diameter of the arc-shaped groove is too large, resulting in a thin filling layer that affects the strength of the filling layer and causes it to sway under the action of airflow, generating noise. Conversely, it avoids the situation where the diameter of the arc-shaped groove is too small, which would affect the guiding effect of the arc-shaped groove and prevent the backflow from flowing to the air outlet at the tooth gap, resulting in obstructed airflow, increased energy loss of airflow, and easy generation of noise.

[0040] As an optional implementation, the base plate, each of the volute teeth, and the filling portion are integrally formed.

[0041] This avoids errors that may occur in traditional assembly processes, such as uneven gaps between components and weak connections. This not only improves product quality consistency but also reduces the difficulty of quality control during production. The one-piece molding manufacturing process reduces the number of parts and assembly steps, thereby lowering production costs and time. Simultaneously, reducing the number of connectors required during assembly further reduces costs and allows for smooth and continuous surfaces of the base plate, volute teeth, and filling section. This enables smoother airflow as it passes over these components, reducing airflow resistance and turbulence caused by gaps or uneven assembly, further optimizing the airflow path and improving the air conditioning's delivery efficiency.

[0042] Compared with the prior art, the beneficial effects of this application are:

[0043] The wall-mounted air conditioner indoor unit provided in this application embodiment can be provided with a filling part in the gap between the teeth. The first guide surface of the filling part can guide the high-speed airflow blowing directly into the gap between the teeth. Together with the volute teeth, it can guide part of the airflow at the air outlet to smoothly enter the cross-flow fan. The windproof surface of the filling part can block the backflow of airflow, which can alleviate the impact of airflow, prevent airflow backflow, reduce the energy loss of airflow and reduce noise, thereby improving the duct performance and increasing the exhaust air volume of the wall-mounted air conditioner indoor unit. Attached Figure Description

[0044] 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.

[0045] Figure 1 This is a schematic diagram of the structure of the wall-mounted air conditioner indoor unit disclosed in the embodiments of this application;

[0046] Figure 2 This is a schematic cross-sectional view of the indoor unit of a wall-mounted air conditioner disclosed in an embodiment of this application;

[0047] Figure 3 This is another cross-sectional structural diagram of the wall-mounted air conditioner indoor unit disclosed in the embodiments of this application;

[0048] Figure 4 The embodiments disclosed in this application Figure 3 A magnified structural diagram at point A in the diagram;

[0049] Figure 5 The embodiments disclosed in this application Figure 4 A magnified structural diagram at point B in the diagram;

[0050] Figure 6 This is a schematic diagram of the air guide channel disclosed in the embodiments of this application;

[0051] Figure 7 This is a schematic diagram of the structure of the cochlear tongue disclosed in the embodiments of this application;

[0052] Figure 8 The embodiments disclosed in this application Figure 7 A magnified structural diagram at point C;

[0053] Figure 9 This is a schematic diagram of the structure of a portion of the cochlea disclosed in the embodiments of this application;

[0054] Figure 10 This is a structural schematic diagram of the cochlear tongue from another angle, as disclosed in an embodiment of this application.

[0055] Explanation of reference numerals in the attached figures:

[0056] 100-Casing; 11-Receiving cavity; 12-Air outlet; 10-Cross-flow fan; 20-Vortex; 30-Vortex tongue; 31-Base plate; 32-Vortex tongue teeth; 321-Second guide surface; 322-Arc segment; 323-Straight segment; 33-Filling part; 331-First guide surface; 3311-First chord edge; 3312-Second chord edge; 3313-First arc edge; 3314-Second arc edge; 332-Windproof surface; 333-Air guide groove; 3331-Arc groove surface; 334-Gap between teeth; 3341-Air inlet end; 3342-Air outlet end. Detailed Implementation

[0057] 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.

[0058] In this application, the terms "upper," "lower," "top," "bottom," "inner," "vertical," and "horizontal," etc., 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.

[0059] 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.

[0060] Furthermore, the terms "set up," "equipped with," and "connected" 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.

[0061] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, elements, or components (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, elements, or components. Unless otherwise stated, "a plurality of" means two or more.

[0062] With the improvement of living standards and the change of aesthetic concepts, users are no longer satisfied with just the basic performance of air conditioners, but pay more attention to the coordination and unity of their appearance with the interior decoration style, cost performance, and the aesthetics of their installation with the indoor environment.

[0063] Wall-mounted air conditioners, a common type of air conditioner, are typically installed by hanging the indoor unit on the wall. This installation method not only effectively utilizes wall space and avoids the problem of air conditioners occupying valuable floor space, but also maintains the overall harmony of the interior design to a certain extent. Furthermore, wall-mounted air conditioners are suitable for various apartment layouts and decorating styles. Whether it's a small or large apartment, a modern minimalist style or a classic Chinese style, wall-mounted air conditioners can complement the interior design with their diverse appearances. In addition, wall-mounted air conditioners offer multiple control methods to meet the different temperature and airflow needs of various users. Therefore, due to their convenient installation, wide applicability, and moderate price, wall-mounted air conditioners have become a common choice for many homes and offices.

[0064] A wall-mounted air conditioner indoor unit consists of a casing, a cross-flow fan, a volute, and a volute tongue. The cross-flow fan is housed within the casing, and the volute tongue and volute are arranged radially at intervals along the fan. However, the volute tongue and volute, being complex and delicate curved structures, are prone to defects such as shrinkage marks, weld lines, and porosity during injection molding due to insufficient material flow, directly impacting product yield and appearance quality. A comb-like volute tongue design, with multiple parallel volute tongue teeth and gaps between adjacent teeth, eliminates the problem of material accumulation during base injection molding, where molten plastic must bypass the curved surface of the volute tongue to fill the back cavity. This filling process is characterized by an excessively long flow path and high shear rate.

[0065] However, when high-speed airflow passes through the gap between the teeth, the flow space drops sharply, the local flow velocity increases sharply, the impact of the airflow is obvious, and backflow is easily generated, causing the airflow to circulate inside the volute. This results in some airflow not being able to be discharged from the exhaust port of the casing, reducing the exhaust volume of the indoor unit of the wall-mounted air conditioner.

[0066] Based on this, this application provides a wall-mounted air conditioner indoor unit that can prevent high-speed airflow from blowing directly into the gap between the teeth and prevent backflow, reduce the energy loss of airflow, increase the exhaust air volume of the wall-mounted air conditioner indoor unit and reduce noise.

[0067] The following will combine the embodiments and Figures 1-10 The technical solution of this application will be further explained.

[0068] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of the wall-mounted air conditioner indoor unit disclosed in the embodiments of this application. Figure 2This is a cross-sectional structural diagram of the wall-mounted air conditioner indoor unit disclosed in this application embodiment. This application embodiment discloses a wall-mounted air conditioner indoor unit, including a housing 100, a cross-flow fan 10, a volute 20, and a volute tongue 30. The housing 100 forms a receiving cavity 11 and has an air outlet 12 communicating with the receiving cavity 11. The cross-flow fan 10 is disposed in the receiving cavity 11 of the housing 100. The volute 20 is disposed around one side of the cross-flow fan 10. The volute tongue 30 is radially spaced from the volute 20 along the cross-flow fan 10. The volute tongue 30 has a base plate 31, multiple volute tongue teeth 32, and a filling part 33. The base plate 31 is disposed near the air outlet 12 of the housing 100. The multiple volute tongue teeth 32 are all along the axial direction of the cross-flow fan 10. The fan is spaced on the base plate 31, and a tooth gap 334 is formed between each pair of adjacent volute teeth 32. The tooth gap 334 has an air inlet end 3341 facing the air outlet 12 of the housing 100. A filling part 33 is disposed in the tooth gap 334. The filling part 33 has a first guide surface 331 and a windproof surface 332. The first guide surface 331 is a curved surface that protrudes away from the base plate 31. The first guide surface 331 is used to guide part of the airflow at the air outlet 12 into the cross-flow fan 10. The windproof surface 332 is away from the air inlet end 3341 of the tooth gap 334. The windproof surface 332 is used to prevent the airflow in the tooth gap 334 from entering the air outlet 12.

[0069] For details, please refer to Figure 3 , Figure 3 This is another cross-sectional structural diagram of the wall-mounted air conditioner indoor unit disclosed in this application embodiment. The casing 100 serves as the main outer shell of the wall-mounted air conditioner indoor unit, accommodating and protecting the internal components. The casing 100 contains components such as a volute 20, a cross-flow fan 10, a volute tongue 30, and a filling section 33. The cross-flow fan 10 is located in the receiving cavity 11 of the volute 20. The cross-flow fan 10 guides airflow, allowing air to pass through the volute 20 and be discharged from the air outlet 12 of the casing 100 under the action of the cross-flow fan 10.

[0070] Cross-flow fans are characterized by their compact structure, large air volume, and low operating noise, making them suitable for wall-mounted air conditioner indoor units. The wall-mounted air conditioner indoor unit also includes a drive motor, with the cross-flow fan 10 connected to it and rotating under its drive. When the cross-flow fan 10 rotates, the air between its blades is thrown around the impeller under centrifugal force, its volume is compressed, and its density increases, generating static pressure. Simultaneously, it increases the airflow velocity, generating dynamic pressure, causing the air to be delivered from the outlet 12. However, after the airflow reaches the inner wall of the volute 20, due to the lack of a clear guiding direction, it will bounce back into the cross-flow fan 10 along the inner wall of the volute 20, forming a circulating flow. The volute tongue 30 is located at the outlet 12 of the casing 100. Its main function is to prevent gas from circulating within the casing 100. Its multiple volute tongue teeth 32 allow some airflow to be smoothly discharged from the outlet 12, while some airflow returns to the cross-flow fan 10. This process of some airflow returning to the cross-flow fan 10 is called return air. The return air process involves the indoor unit of the wall-mounted air conditioner drawing in indoor air, exchanging heat, and then drawing it back in and expelling it through the cross-flow fan 10. This circulation process effectively regulates indoor temperature and humidity while maintaining clean air.

[0071] refer to Figure 7 , Figure 7 This is a schematic diagram of the volute tongue 30 disclosed in the embodiments of this application. The volute tongue 30 includes a base plate 31 and a plurality of volute tongue teeth 32. The plurality of volute tongue teeth 32 are arranged at intervals on the base plate 31, so that a tooth gap 334 can be formed between two adjacent volute tongue teeth 32. The tooth gap 334 leaves a certain space between two adjacent volute tongue teeth 32, which can eliminate the problem of material accumulation caused by the molten plastic having to bypass the curved surface of the volute tongue 30 to fill the back cavity during the injection molding of the base.

[0072] The volute tongue 30 also includes a filling part 33, which is disposed in the tooth gap 334. The filling part 33 can be integrally formed with the volute tongue teeth 32. That is, the filling part 33 is directly formed during the injection molding process of the volute tongue 30, so that the filling part 33 and the adjacent volute tongue teeth 32 form a whole, avoiding the existence of gaps between the filling part 33 and the volute tongue teeth 32, which would affect the air guiding effect of the filling part 33 and the volute tongue teeth 32.

[0073] refer to Figure 4 and Figure 5 , Figure 4 The embodiments disclosed in this application Figure 3 A magnified structural diagram at point A in the diagram. Figure 5 The embodiments disclosed in this application Figure 4The enlarged structural diagram at point B is shown. The filling part 33 has at least a first guide surface 331 and a windproof surface 332. The first guide surface 331 is a curved surface that protrudes from the bottom plate 31. The first guide surface 331 can be a curved surface, specifically an arc-shaped curved surface. The first guide surface 331 can guide the high-speed airflow blowing directly towards the tooth gap 334. It can guide part of the airflow at the air outlet 12 into the cross-flow fan 10 together with the volute teeth 32, reducing the airflow entering the tooth gap 334, improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the wall-mounted air conditioner indoor unit.

[0074] The inter-tooth gap 334 is formed by adjacent volute teeth 32. The inter-tooth gap 334 has an air inlet end 3341 facing the air outlet 12 of the housing 100 and an air outlet end 3342 opposite to the air inlet end 3341 along the extension direction of the volute teeth 32. The windproof surface 332 of the filling part 33 faces away from the air inlet end 3341 of the inter-tooth gap 334, that is, the windproof surface 332 faces the air outlet end 3342 of the inter-tooth gap 334. When the airflow enters the inter-tooth gap 334, the flow space drops sharply and the local flow velocity increases sharply. The impact of the airflow is obvious and backflow is easy to occur. The windproof surface 332 can block the backflow from flowing out from the air inlet end 3341 of the inter-tooth gap 334, avoiding the backflow airflow from disturbing the normal flow of airflow and affecting the normal flow of airflow, thereby improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the indoor unit of the wall-mounted air conditioner.

[0075] According to the embodiment of the present utility model, the wall-mounted air conditioner indoor unit is provided with a filling part 33 in the tooth gap 334. The first guide surface 331 of the filling part 33 can guide the high-speed airflow blowing directly into the tooth gap 334. Together with the volute teeth 32, it can guide part of the airflow at the air outlet 12 into the cross-flow fan 10. The windproof surface 332 of the filling part 33 blocks the backflow airflow, which can alleviate the impact of the airflow, prevent the airflow backflow, thereby reducing the energy loss of the airflow and reducing noise, thereby improving the duct performance and increasing the exhaust air volume of the wall-mounted air conditioner indoor unit.

[0076] Combination Figure 7 and Figure 8 , Figure 8 The embodiments disclosed in this application Figure 7 The enlarged structural diagram at point C is shown. In some embodiments, each volute tooth 32 has a second guide surface 321, which is a curved surface protruding away from the base plate 31; wherein the curvature of the first guide surface 331 is the same as the curvature of the second guide surface 321.

[0077] Specifically, each volute tongue 32 has an arc-shaped segment and a straight segment. The arc-shaped segment is located at the air outlet 12 of the housing 100, and the straight segment connects to the arc-shaped segment and transitions smoothly. The arc-shaped segment introduces part of the airflow at the air outlet 12 of the housing 100 into the cross-flow fan 10, while the straight segment continues to guide the introduced airflow, moving it along the profile of the volute tongue 30. The arc-shaped segment has a second guide surface 321, which is curved and protrudes away from the base plate 31. The second guide surface 321 has a certain curvature. The design of the specific curvature can make the airflow smoother, avoid the airflow separation or vortex at the volute tongue 32, thereby optimizing the airflow path and improving the airflow efficiency. In this embodiment of the application, the curvature of the first guide surface 331 of the filling part 33 is the same as that of the second guide surface 321, which allows the airflow to connect more naturally when passing through the first guide surface 331 and the second guide surface 321, forming a smooth airflow transition area. This makes the airflow smoother and avoids the airflow from separating or vortexing at the volute tongue tooth 32, thereby optimizing the airflow path, improving the airflow efficiency, and reducing the energy loss of the airflow.

[0078] Combination Figure 7 and Figure 8 In some embodiments, the first guide surface 331 and the second guide surface 321 are on the same curved surface.

[0079] Specifically, the first guide surface 331 and the second guide surface 321 are located on the same curved surface, with the same curvature and no height difference. The first guide surface 331 and the second guide surface 321 can form a continuous and smooth curved surface. Since the first guide surface 331 and the second guide surface 321 are on the same curved surface, the airflow can transition more smoothly when passing through the filling part 33 and the volute tooth 32, without generating eddies or airflow separation due to sudden changes in the curved surface, further improving the airflow efficiency. Moreover, the uniform airflow distribution and smooth guiding process can reduce eddies and turbulence in the airflow within the tooth gap 334, thereby reducing noise caused by airflow impact and friction and improving the user experience. In addition, the first guide surface 331 and the second guide surface 321 can be manufactured using materials with special properties, or a special coating can be applied to the surface to reduce airflow resistance, improve surface wear resistance and corrosion resistance, thereby extending the service life of the component and maintaining good guiding performance. For example, using materials with a low coefficient of friction or coatings with self-cleaning properties reduces the adhesion of dust and other impurities on the guide surface, ensuring smooth airflow. It is worth noting that... Figure 7 and Figure 8 The dashed lines in the text are auxiliary lines that highlight the boundary of the filling part 33. When the filling part 33 and the volute tooth 32 are integrally formed and the first guide surface 331 and the second guide surface 321 are on the same curved surface, there is no obvious dividing line.

[0080] Combination Figure 4 and Figure 6 In some embodiments, the arc length of the first guide surface 331 is less than or equal to half the arc length of the second guide surface 321.

[0081] Specifically, the filling part 33 and the volute tooth 32 can be integrally molded by plastic injection molding. The arc length of the first guide surface 331 is not greater than half the arc length of the second guide surface 321. This can prevent the first guide surface 331 from affecting the demolding process of the filling part 33. The arc length of the first guide surface 331 can be equal to half the arc length of the second guide surface 321. This can maximize the arc length of the first guide surface 331 while ensuring that the first guide surface 331 can be demolded smoothly, thereby improving the guiding path of the first guide surface 331 and thus improving the guiding effect of the first guide surface 331, so that the airflow can smoothly enter the cross-flow fan 10.

[0082] Combination Figure 7 and Figure 8 In some embodiments, the first guide surface 331 completely blocks the air inlet end 3341 of the interdental gap 334.

[0083] Specifically, the filling part 33 can be located at the air inlet end of the inter-tooth gap 334, so that the first guide surface 331 completely blocks the air inlet end 3341 of the inter-tooth gap 334. This can prevent high-speed airflow from directly entering the air inlet end 3341 of the inter-tooth gap 334. Together with the volute teeth 32, it can guide part of the airflow at the air outlet 12 into the cross-flow fan 10, reducing the airflow entering the inter-tooth gap 334, improving the smoothness of airflow, reducing the energy loss of airflow, and thus increasing the exhaust air volume of the wall-mounted air conditioner indoor unit. Moreover, compared with setting the filling part 33 in the middle part of the inter-tooth gap 334 and blocking the middle part of the inter-tooth gap 334 by the first guide surface 331, the blocking of the air inlet end 3341 proposed in this embodiment can block more airflow outside the inter-tooth gap 334 and can guide the fast airflow at the air inlet end 3341, which is more conducive to the smooth entry of airflow into the cross-flow fan 10.

[0084] Combination Figure 7 and Figure 8In some embodiments, the first guide surface 331 has a first chord edge 3311, a second chord edge 3312, a first arc edge 3313, and a second arc edge 3314. The first chord edge 3311 is connected to the base plate 31 and is located at the air inlet end 3341 of the inter-tooth gap 334. The second chord edge 3312 is opposite to the first chord edge 3311 and is located within the inter-tooth gap 334. The first arc edge 3313 is located within the inter-tooth gap 334 and is connected to a volute tooth 32 adjacent to the inter-tooth gap 334 where the first guide surface 331 is located. The second arc edge 3314 is opposite to the first arc edge 3313 and is located within the inter-tooth gap 334. The second arc edge 3314 is connected to another volute tooth 32 adjacent to the inter-tooth gap 334 where the first guide surface 331 is located.

[0085] Specifically, the first chord edge 3311 and the second chord edge 3312 are arranged opposite each other, and both the first chord edge 3311 and the second chord edge 3312 are straight edges of curved surfaces. The first arc edge 3313 and the second arc edge 3314 are arranged opposite each other, and both the first arc edge 3313 and the second arc edge 3314 are arc edges of curved surfaces, presenting a curved shape. The first arc edge 3313 is connected to an adjacent volute tongue tooth 32, and the second arc edge 3314 is connected to another adjacent volute tongue tooth 32. This connection tightly connects the first guide surface 331 with the volute tongue teeth 32 on both sides, forming a whole, which together constitutes the boundary of the inter-tooth gap 334, so that the first guide surface 331 can completely cover the air inlet end 3341 of the inter-tooth gap 334. The filling part 33 can be located at the air inlet end 3341 of the tooth gap 334, that is, the first chord edge 3311 can be located at the air inlet end 3341 of the tooth gap 334, and the first chord edge 3311 is connected to the base plate 31, so that the first guide surface 331 can guide the air inlet end 3341 of the tooth gap 334, which can prevent high-speed airflow from directly entering the air inlet end 3341 of the tooth gap 334. It can guide part of the airflow at the air outlet 12 together with the volute teeth 32 into the cross-flow fan 10, reduce the airflow entering the tooth gap 334, improve the smoothness of airflow, reduce the energy loss of airflow, and thus increase the exhaust air volume of the indoor unit of the wall-mounted air conditioner. Moreover, after the filling part 33 is provided, the airflow enters the tooth gap 334. The position of the inter-tooth gap 334 will change, and the position of the airflow entering the inter-tooth gap 334 will be shifted towards the direction of the air outlet 3342 of the inter-tooth gap 334. At this time, the gas flow velocity is lower than the flow velocity at the air outlet 12 of the original casing 100, that is, the flow velocity of the airflow entering the inter-tooth gap 334. Compared with not setting the filling part 33, when the airflow directly enters the inter-tooth gap 334 from the air inlet 3341 of the inter-tooth gap 334, the flow velocity of the airflow entering the inter-tooth gap 334 in this embodiment of the application is reduced, and the backflow generated when the airflow enters the inter-tooth gap 334 is reduced, which indirectly improves the smoothness of the airflow and further reduces the energy loss of the airflow, thereby optimizing the air supply performance of the wall-mounted air conditioner indoor unit.

[0086] Combination Figure 4 , Figure 5 and Figure 6 , Figure 6 This is a schematic diagram of the air guide groove 333 disclosed in the embodiments of this application. In some embodiments, the filling part 33 has an air guide groove 333, which is disposed on the windproof surface 332. The air guide groove 333 has an arc-shaped groove surface 3331, which is a concave curved surface.

[0087] Specifically, the air guide groove 333 is recessed into the filling part 33, with the recessed direction facing the air inlet end 3341 of the tooth gap 334. The air guide groove 333 has an arc-shaped groove surface 3331. The entire inner wall surface of the air guide groove 333 can be an arc-shaped groove surface 3331, or it can be partially formed into an arc-shaped groove surface 3331. The arc-shaped groove surface 3331 can be a smooth, concave curved surface. The air guide groove 333 can play a certain guiding role in the airflow, such as... Figure 6 As shown, Figure 6 The arrows indicate the direction of airflow. The air guide slot 333 guides the returning airflow towards the outlet 3342 of the tooth gap 334. That is, during the process of airflow entering the tooth gap 334, the resulting backflow is not only blocked by the windproof surface 332, but also guided towards the outlet 3342 of the tooth gap 334 by the air guide slot 333 on the windproof surface 332. This allows more airflow in the tooth gap 334 to flow towards the outlet 3342, thereby reducing airflow resistance in the tooth gap 334, reducing energy loss caused by backflow, and reducing noise generated by direct airflow impacting the windproof surface 332. This results in smoother airflow and a better user experience. Furthermore, multi-segment curved surfaces or asymmetrical curved surfaces can be used to better adapt to the airflow characteristics and further reduce resistance and noise. Special surface treatments can also be applied to the arc-shaped groove surface 3331, such as adding a smooth coating or an anti-static coating, to reduce airflow friction loss and dust adhesion, and maintain the airflow guiding performance of the air guide groove 333.

[0088] Combination Figure 7 and Figure 8 In some embodiments, the arcuate groove 3331 is tangent to the surface of the base plate 31.

[0089] Specifically, the surface of the base plate 31 is the wall surface on which the volute tongue 32 is installed, and the volute tongue 32 can be integrally formed with the base plate 31. The arc-shaped groove surface 3331 is geometrically tangent to the surface of the base plate 31, that is, the tangents of the two coincide at the contact point. The air guide slot 333 can also be the rounded corner at the intersection between the windproof surface 332 and the surface of the base plate 31, and the air guide slot 333 can be formed together with the volute tongue 32 during injection molding. The design of the arc-shaped groove surface 3331 being tangent to the surface of the base plate 31 allows the airflow to smoothly transition along the tangent point when it enters the air guide slot 333 from the base plate 31, without significant resistance, avoiding airflow separation or eddies caused by abrupt changes in shape, thereby reducing airflow energy loss and noise. In addition, special material selection and surface treatment can be applied to the arc-shaped groove surface 3331 and the surface of the base plate 31. For example, a low-friction coefficient material or a smooth coating can be used to reduce airflow friction loss; or a wear-resistant material can be used to extend the service life of the components.

[0090] Combination Figure 7 and Figure 8 In some embodiments, the curvature of the arcuate groove surface 3331 is the same as the curvature of the first guide surface 331.

[0091] Specifically, the curvature of the arc-shaped groove surface 3331 is the same as that of the first guide surface 331, enabling them to have the same degree of curvature. Since the arc-shaped groove surface 3331 and the first guide surface 331 have the same curvature, when the returning airflow moves back towards the outlet end 3342 of the tooth gap 334 under the action of the air guide groove 333, the airflow direction can be consistent with the airflow direction guided by the first guide surface 331 and the second guide surface 321, further optimizing the airflow path and reducing energy loss and noise. Moreover, the identical curvature design simplifies design and manufacturing processes in engineering practice, reduces the complexity of injection molds, lowers production costs, and ensures component consistency and reliability.

[0092] Combination Figure 7 and Figure 8 In some embodiments, the diameter of the arcuate groove surface 3331 is one-fifth to one-quarter of the diameter of the first guide surface 331.

[0093] Specifically, the curvature of the arc-shaped groove surface 3331 is the same as that of the first guide surface 331, while the diameter is one-fifth to one-quarter of that of the first guide surface 331. This avoids the arc-shaped groove surface 3331 having an excessively large diameter, which would result in the filling part 33 being too thin, affecting the strength of the filling part 33 and causing it to sway under the action of airflow, generating noise. Conversely, it avoids the arc-shaped groove surface 3331 having an excessively small diameter, which would affect the guiding effect of the arc-shaped groove surface 3331, causing the backflow at the arc-shaped groove surface 3331 to be unable to flow to the air outlet 3342 of the tooth gap 334, resulting in obstructed airflow, increased energy loss of airflow, and easy generation of noise.

[0094] Combination Figure 9 and Figure 10 , Figure 9 This is a schematic diagram of the structure of a portion of the volute tongue 30 disclosed in an embodiment of this application. Figure 10 This is a structural schematic diagram of a portion of the volute tongue 30 disclosed in an embodiment of this application from another angle. In some embodiments, the base plate 31, each volute tongue tooth 32, and the filling portion 33 are all integrally formed with the volute shell 20.

[0095] Specifically, the housing 100 includes a base, and a volute 30 can be mounted on the base. The volute 30 can be integrally molded with the base; that is, the base plate 31, each volute tooth 32, and the filling part 33 of the volute 30 are integrally molded with the base using an integrated molding process. This can be achieved through an integrated injection molding process, where the base plate 31, each volute tooth 32, and the filling part 33 are integrally molded together with the base to form a single structure. This integrated molding design eliminates obvious gaps between the base plate 31, volute teeth 32, and filling part 33, enhancing the overall structural strength and stability. During air conditioner operation, especially under airflow impact and vibration, the integrated structure better resists deformation and loosening, extending the service life of components. Furthermore, the integrated molding process avoids errors that may occur during traditional assembly, such as uneven gaps between components and weak connections. This not only improves product quality consistency but also reduces the difficulty of quality control during production. The integrated molding manufacturing process reduces the number of parts and assembly steps, thereby reducing production costs and production cycle. Meanwhile, reducing the number of connectors required during assembly further lowers costs and allows for smoother and more continuous surfaces of the base plate 31, volute tongue 32, and filling portion 33. This enables smoother airflow as it passes through these components, reducing airflow resistance and turbulence caused by gaps or uneven assembly, further optimizing the airflow path, and improving the air delivery efficiency of the wall-mounted air conditioner indoor unit proposed in this embodiment. Furthermore, a multi-material integrated molding technology can be employed, combining the advantages of different materials. One material can be used for the base plate 31, which forms the main body, while another material with better airflow guidance or wear resistance can be used for the volute tongue 32 and filling portion 33. This multi-material integrated molding technology can further optimize component performance while ensuring overall structural strength.

Claims

1. A wall-mounted air conditioner indoor unit, characterized in that, include: A housing (100) having a receiving cavity (11) and an air outlet (12) communicating with the receiving cavity (11); A cross-flow fan (10) is disposed in the receiving cavity (11) of the housing (100); A volute (20) is disposed around one side of the cross-flow fan (10); A volute tongue (30) is provided radially spaced from the volute casing (20) of the cross-flow fan (10), and the volute tongue (30) has the following characteristics: A base plate (31) is disposed near the air outlet (12) of the housing (100); Multiple volute teeth (32) are spaced apart on the base plate (31) along the axial direction of the cross-flow fan (10). A tooth gap (334) is formed between each two adjacent volute teeth (32). The tooth gap (334) has an air inlet end (3341) facing the air outlet (12) of the housing (100). A filling portion (33) is disposed in the inter-tooth gap (334), and the filling portion (33) has: The first guide surface (331) is a curved surface that protrudes away from the bottom plate (31). The first guide surface (331) is used to guide part of the airflow at the air outlet (12) into the cross-flow fan (10). A windproof surface (332) is located away from the air inlet end (3341) of the tooth gap (334), and the windproof surface (332) is used to prevent the airflow in the tooth gap (334) from entering the air outlet (12).

2. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, Each of the aforementioned cochlear teeth (32) has: The second guide surface (321) is a curved surface that protrudes away from the bottom plate (31); The curvature of the first guide surface (331) is the same as that of the second guide surface (321).

3. The wall-mounted air conditioner indoor unit according to claim 2, characterized in that... The first guide surface (331) and the second guide surface (321) are on the same curved surface.

4. The wall-mounted air conditioner indoor unit according to claim 3, characterized in that, The arc length of the first guide surface (331) is less than or equal to half the arc length of the second guide surface (321).

5. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, The first guide surface (331) completely blocks the air inlet end (3341) of the interdental gap (334).

6. The wall-mounted air conditioner indoor unit according to claim 5, characterized in that, The first guide surface (331) all have: The first chord edge (3311) is connected to the base plate (31) and is located at the air inlet end (3341) of the tooth gap (334); The second chord edge (3312) is opposite to the first chord edge (3311) and is located within the tooth gap (334); The first arc edge (3313) is located within the interdental gap (334), and the first arc edge (3313) is connected to a volute tongue tooth (32) adjacent to the interdental gap (334) where the first guide surface (331) is located; The second arc edge (3314) is opposite to the first arc edge (3313). The second arc edge (3314) is located within the interdental gap (334). The second arc edge (3314) is connected to another volute tooth (32) adjacent to the interdental gap (334) where the first guide surface (331) is located.

7. The wall-mounted air conditioner indoor unit according to claim 1, characterized in that, The filling portion (33) has: An air guide groove (333) is provided on the windproof surface (332). The air guide groove (333) has an arc-shaped groove surface (3331), which is a concave curved surface.

8. The wall-mounted air conditioner indoor unit according to claim 7, characterized in that, The arc-shaped groove surface (3331) is tangent to the surface of the base plate (31), and the curvature of the arc-shaped groove surface (3331) is the same as the curvature of the first guide surface (331).

9. The wall-mounted air conditioner indoor unit according to claim 8, characterized in that, The diameter of the arc-shaped groove (3331) is one-fifth to one-quarter of the diameter of the first guide surface (331).

10. The wall-mounted air conditioner indoor unit according to any one of claims 1-9, characterized in that, The base plate (31), each of the volute teeth (32) and the filling part (33) are integrally formed.

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