Wall-mounted air conditioner

Abstract

The utility model particularly discloses a wall-mounted air conditioner. An indoor unit of the wall-mounted air conditioner comprises a machine shell; a heat exchanger; a cross-flow fan; an electric heater; the air duct assembly comprises a volute; the side, facing the cross-flow fan, of the front volute tongue is provided with a first air guide face, and the first air guide face comprises a first air guide part which is a concave curved face sunken in the direction away from the cross-flow fan; the second air guide part is connected to the end, close to the air outlet of the machine shell, of the first air guide part, and the second air guide part is a convex curved surface protruding towards the air outlet of the machine shell; the multiple protruding structures are arranged on the first air guide face at intervals in the axial direction of the cross-flow fan, a second air guide face is arranged on the side, facing the cross-flow fan, of each protruding structure, and each second air guide face comprises a third air guide part which is a concave curved face sunken in the direction away from the cross-flow fan; the fourth air guide part is connected to the end, close to the air outlet of the machine shell, of the third air guide part, and the fourth air guide part is a convex curved surface protruding towards the air outlet of the machine shell. By the adoption of the technical scheme, the front volute tongue can be matched with the flowing direction of airflow, and then noise is lowered.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, and particularly relates to a wall-mounted air conditioner. BACKGROUND

[0002] Air conditioner refers to an air conditioner, which is an air conditioner that adjusts and controls the temperature, humidity, flow rate and other parameters of the air in the environment of a building or structure by artificial means.

[0003] At present, more and more people choose to install air conditioners indoors to regulate the temperature of indoor air. The wall-mounted air conditioner is one of many types of air conditioners. The wall-mounted air conditioner has the characteristics of flexible installation position, high cost performance and wide application range, so it has become the first choice for many families when choosing an air conditioner.

[0004] In the prior art, reducing the thickness of the wall-mounted air conditioner will result in a more limited internal space of the indoor unit, which will result in greater flow resistance of the airflow in the indoor unit. When the fan drives the airflow to rotate, the outflow airflow will periodically impact the front volute tongue. The periodic impact will intensify the noise at a certain frequency, thereby affecting the user's experience. Content of the utility model

[0005] The embodiment of the present application discloses a wall-mounted air conditioner, which can reduce the impact of airflow on the front volute tongue, so that the front volute tongue is adapted to the flow direction of the airflow, and the noise level of the indoor unit is reduced.

[0006] In order to achieve the above purpose, some embodiments of the present application provide a wall-mounted air conditioner, which comprises:

[0007] The indoor unit comprises: a cabinet provided with a cabinet air inlet and a cabinet air outlet, and a cabinet accommodating cavity formed in the cabinet, the cabinet comprising a back plate for connecting with a wall in a room; a heat exchanger arranged in the cabinet accommodating cavity, the heat exchanger being used for heat exchange of air flow passing through the cabinet air inlet; a cross-flow fan arranged in the cabinet accommodating cavity and located on a side of the heat exchanger away from the cabinet air inlet, the cross-flow fan being used for introducing air flow into the cabinet from the cabinet air inlet and conveying the air flow to the room through the cabinet air outlet after heat exchange through the heat exchanger; an electric heater arranged in the cabinet accommodating cavity and located between the heat exchanger and the cross-flow fan; and a duct assembly arranged in the cabinet accommodating cavity, the duct assembly comprising a duct formed therein, the cross-flow fan being arranged in the duct, the duct assembly comprising: a volute arranged on a side of the cross-flow fan facing the back plate; a front volute tongue arranged in the radial direction of the cross-flow fan and close to the cabinet air outlet, the front volute tongue comprising a first air guide surface on a side facing the cross-flow fan, the first air guide surface comprising: a first air guide portion; and a second air guide portion connected to one end of the first air guide portion close to the cabinet air outlet, the second air guide portion being a convex curved surface protruding towards the cabinet air outlet; and a plurality of protruding structures arranged in the first air guide surface in the axial direction of the cross-flow fan, the protruding structures comprising a second air guide surface on a side facing the cross-flow fan, the second air guide surface comprising: a third air guide portion; and a fourth air guide portion connected to one end of the third air guide portion close to the cabinet air outlet, the fourth air guide portion being a convex curved surface protruding towards the cabinet air outlet; the first air guide portion being a concave curved surface recessed away from the cross-flow fan, and the third air guide portion being a concave curved surface recessed away from the cross-flow fan.

[0008] In this way, by arranging the first air guide portion of the first air guide surface of the front volute tongue as a concave curved surface recessed away from the cross-flow fan, the first air guide surface of the concave curved surface matches the flow direction of the air flow, so that the air flow can be guided along the first air guide surface to flow back to the cross-flow fan in the process of flowing to the front volute tongue under the action of the cross-flow fan, thereby reducing the impact of the air flow on the first air guide surface and further reducing the rotating noise around the front volute tongue, and improving the user experience during use.

[0009] In some embodiments of the present application, the first air guide portion and the third air guide portion correspond in the thickness direction of the front volute tongue, and the second air guide portion and the fourth air guide portion correspond in the thickness direction of the front volute tongue.

[0010] Therefore, the airflow can form an orderly flow path when passing through the first air guide part and the second air guide part, and the airflow separation and vortex generated at the first air guide part and the second air guide part are reduced, thereby reducing the noise during operation.

[0011] In some embodiments of the present application, the distance between the first air guide part and the outer contour of the cross-flow fan gradually decreases in the direction from the second air guide part to the first air guide part.

[0012] Therefore, the gradually decreasing distance between the first air guide part and the outer contour of the cross-flow fan means that the flow channel of the airflow gradually narrows when the airflow passes through this area. This gradually changing flow channel can converge the airflow and adapt to the changes in the airflow driven by the cross-flow fan when flowing along the front volute tongue, so that the airflow can smoothly return to the cross-flow fan, reduce the disturbance to the operation of the cross-flow fan, and make the airflow driven by the cross-flow fan more stable, thereby reducing the noise generated by airflow fluctuations.

[0013] In some embodiments of the present application, the minimum distance between the first air guide part and the outer contour of the cross-flow fan is 3mm-7mm in the direction from the second air guide part to the first air guide part.

[0014] Therefore, the airflow can more smoothly return to the cross-flow fan, and a reasonable acceleration area can be provided for the airflow, so that the airflow has a certain speed before entering the cross-flow fan, thereby preventing the airflow from being unable to return to the cross-flow fan due to low speed.

[0015] In some embodiments of the present application, the distance between the third air guide part and the outer contour of the cross-flow fan gradually decreases in the direction from the fourth air guide part to the third air guide part.

[0016] Therefore, the airflow can be better guided to flow along a predetermined path, reducing turbulence and vortex phenomena in the air duct, and improving the flow efficiency of the airflow. Furthermore, as the distance gradually decreases, the airflow will be subjected to a certain extrusion effect when passing through this area, and the flow rate of the airflow will gradually increase, ensuring that the airflow can return to the cross-flow fan.

[0017] In some embodiments of the present application, the minimum distance between the third air guide part and the outer contour of the cross-flow fan is 3mm-7mm in the direction from the fourth air guide part to the third air guide part.

[0018] Therefore, the airflow can smoothly return to the cross-flow fan, and a reasonable acceleration area can be provided for the airflow, so that the airflow has a certain speed before entering the cross-flow fan, thereby preventing the airflow from being unable to return to the cross-flow fan due to low speed.

[0019] In some embodiments of the present application, the distance between two adjacent third air guide portions gradually increases in the direction from the fourth air guide portion to the third air guide portion.

[0020] In this way, the air flow gradually decreases the resistance when passing between two adjacent third air guide portions, and the impact force of the air flow also decreases accordingly. This helps to reduce the noise generated by the impact of the air flow, and reduces the noise level when the indoor unit is running. Moreover, the increase in the distance helps to make the air flow more smoothly, thereby reducing the generation of turbulence and noise.

[0021] In some embodiments of the present application, the minimum distance between two adjacent third air guide portions is 0.5mm-10mm.

[0022] In this way, it can ensure that the air flow has a proper flow space between two adjacent third air guide portions, so that the air flow can be more evenly distributed throughout the air duct, which helps to avoid excessive concentration or dispersion of the air flow, so that the air flow can better cover each area in the air duct, reducing turbulence and dead angles of the air flow in the air duct. Moreover, it can reduce the impact and collision of the air flow between two adjacent third air guide portions, thereby reducing the noise generated by the impact of the air flow.

[0023] In some embodiments of the present application, the curvature of the first air guide portion is greater than the curvature of the third air guide portion.

[0024] In this way, it means that the first air guide portion has a greater curvature, which can more effectively guide the air flow to flow along the predetermined path. When the air flow flows from the fourth air guide portion to the third air guide portion, the large curvature of the first air guide portion can ensure that the air flow smoothly enters the air duct and flows along the first air guide portion, reducing turbulence and vortex phenomena of the air flow in the air duct, thereby reducing the noise generated by the turbulence or vortex of the air flow.

[0025] In some embodiments of the present application, the curvature of the fourth air guide portion is 66-250.

[0026] In this way, it ensures that the air flow can stably pass through the air outlet of the casing to the indoor under the guidance of the fourth air guide portion, ensuring the stability and uniformity of the air outlet of the indoor unit.

[0027] In some embodiments of the present application, the front volute tongue is detachably connected to the casing.

[0028] In this way, the front volute tongue can be easily detached from the casing, thereby facilitating cleaning and maintenance of the front volute tongue.

[0029] In some embodiments of the present application, the indoor unit further comprises: a first fastening member arranged on the front volute; and a second fastening member arranged on the casing, the first fastening member being fastened to the second fastening member.

[0030] In this way, the front volute and the casing can be quickly assembled through the fastening connection of the first fastening member and the second fastening member, without the need for fasteners such as screws and nuts, thereby greatly shortening the assembly time, improving the production efficiency, and reducing the production cost. When the air conditioner indoor unit needs to be maintained, cleaned, or replaced with parts, the design of the fastening connection allows the front volute to be easily detached from the casing without the need for tools to detach the fasteners, thereby saving the disassembly time and improving the maintenance efficiency.

[0031] In some embodiments of the present application, the first fastening member comprises: a first sub-fastening member arranged on a surface of the front volute away from the first air guide surface and corresponding to one end of the first air guide portion away from the second air guide portion; and a second sub-fastening member arranged on the surface of the front volute away from the first air guide surface and corresponding to one end of the second air guide portion away from the first air guide portion.

[0032] In this way, the first sub-fastening member ensures the connection stability of the front volute in the vertical direction after the front volute is mounted on the casing, preventing the front volute from shaking in the vertical direction, and the second sub-fastening member ensures the connection stability of the front volute in the thickness direction of the casing after the front volute is mounted on the casing, preventing the front volute from detaching or shaking in the thickness direction of the casing, thereby ensuring the connection stability between the front volute and the casing.

[0033] In some embodiments of the present application, the first fastening member comprises a plurality of first fastening members arranged on the surface of the front volute away from the first air guide surface in the axial direction of the cross-flow fan.

[0034] The second fastening member comprises a plurality of second fastening members corresponding to the plurality of first fastening members.

[0035] In this way, the arrangement of the plurality of first fastening members and the plurality of second fastening members makes the connection between the front volute and the casing more secure.

[0036] Compared with the prior art, the present application has at least the following beneficial effects:

[0037] The wall-mounted air conditioner provided by the embodiment of the present application has an indoor unit, which comprises a casing, a heat exchanger, a cross-flow fan, an electric heater and an air duct assembly. The casing is provided with a casing air inlet and a casing air outlet, and a casing accommodating cavity is formed in the casing. The casing comprises a back plate, which is used to be connected with a wall in a room. The heat exchanger is arranged in the casing accommodating cavity and is used to exchange heat of air flowing through the casing air inlet. The cross-flow fan is arranged in the casing accommodating cavity and is located on a side of the heat exchanger away from the casing air inlet. The cross-flow fan is used to send the heat-exchanged air into the room through the casing air outlet. The electric heater is arranged in the casing accommodating cavity and is located between the heat exchanger and the cross-flow fan. The air duct assembly is arranged in the casing accommodating cavity, and an air duct is formed in the air duct assembly. The cross-flow fan is arranged in the air duct. The air duct assembly comprises a volute, which is arranged on a side of the cross-flow fan facing the back plate; and a front volute tongue, which is arranged in a spaced manner with the volute. The front volute tongue has a first air guide surface on a side facing the cross-flow fan. The first air guide surface comprises a first air guide part, which is a concave curved surface recessed in a direction away from the cross-flow fan; and a second air guide part, which is connected to one end of the first air guide part close to the casing air outlet and is a convex curved surface protruding towards the casing air outlet. A plurality of protruding structures are arranged on the first air guide surface in an axial direction of the cross-flow fan. The protruding structure has a second air guide surface on a side facing the cross-flow fan. The second air guide surface comprises a third air guide part, which is a concave curved surface recessed in a direction away from the cross-flow fan; and a fourth air guide part, which is connected to one end of the third air guide part close to the casing air outlet and is a convex curved surface protruding towards the casing air outlet. In this way, when the air flow is periodically impacted on the front volute tongue under the driving of the cross-flow fan, the protruding structure can disperse the impact of the air flow, thereby reducing the impact. In addition, since the first air guide part is a concave curved surface recessed in a direction away from the cross-flow fan, it means that the first air guide surface of the concave curved surface matches the flow direction of the air flow. Therefore, in the process of the air flow flowing to the front volute tongue under the action of the cross-flow fan, the air flow can be guided to flow back to the cross-flow fan along the first air guide surface under the guidance of the first air guide surface. In this way, the impact of the air flow on the first air guide surface is reduced, thereby reducing the rotating noise around the front volute tongue and improving the user experience in the use process. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0039] Figure 1 The structure diagram of the indoor unit of the wall-mounted air conditioner disclosed by the embodiment of the present application;

[0040] Figure 2Front view of indoor unit of wall-mounted air conditioner disclosed by embodiments of the present application;

[0041] Figure 3 For Figure 2 Sectional view of A-A in the middle;

[0042] Figure 4 For Figure 3 Enlarged view of a part at A;

[0043] Figure 5 Structure schematic diagram of front volute tongue from one perspective disclosed by embodiments of the present application;

[0044] Figure 6 Front view of front volute tongue disclosed by embodiments of the present application;

[0045] Figure 7 For Figure 5 Enlarged view of a part at B;

[0046] Figure 8 For Figure 6 Enlarged view of a part at C;

[0047] Figure 9 Side view of front volute tongue disclosed by embodiments of the present application;

[0048] Figure 10 Partial structure schematic diagram of cabinet disclosed by embodiments of the present application;

[0049] Figure 11 Structure schematic diagram of front volute tongue from another perspective disclosed by embodiments of the present application.

[0050] Explanation of reference signs:

[0051] 100-Indoor unit;

[0052] 1-Cabinet; 11-Back plate; 1a-Inlet of cabinet; 1b-Outlet of cabinet; 1c-Cavity of cabinet;

[0053] 2-Heat exchanger;

[0054] 3-Through-flow fan;

[0055] 4-Electric heater;

[0056] 5-Air duct assembly; 51-Volute; 52-Front volute tongue; 521-First air guide surface; 5211-First air guide part; 5212-Second air guide part; 53-Protruding structure; 531-Second air guide surface; 5311-Third air guide part; 5312-Fourth air guide part;

[0057] 61-First fastening member; 611-First sub-fastening member; 612-Second sub-fastening member; 62-Second fastening member. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0059] In the present application, the terms “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inner”, “outer”, “vertical”, “horizontal”, “lateral”, “longitudinal” and the like indicate the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0060] In addition, in addition to being used to indicate the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term “upper” can also be used to indicate a certain dependent relationship or connection relationship in some cases. A person of ordinary skill in the art can understand the specific meaning of these terms in the present application according to the specific situation.

[0061] In addition, the terms “mount”, “set”, “provided with”, “connect”, “connected” should be broadly understood. For example, it can be fixedly connected, detachably connected, or integrally constructed; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements or components. A person of ordinary skill in the art can understand the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0062] In addition, the terms “first”, “second” and the like are mainly used to distinguish different devices, elements or components (the specific types and structures can be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise stated, the meaning of “multiple” is two or more.

[0063] With the improvement of living quality and the change of aesthetic concept, people no longer just satisfy with the basic performance of air conditioner, but pay more attention to the coordination and unity of its appearance and indoor decoration style, the cost performance, and the aesthetic degree of indoor environment after installation.

[0064] As a common form of air conditioners, wall-mounted air conditioners are usually installed by hanging on the indoor wall. This installation method not only effectively utilizes the wall space and avoids the problem of occupying valuable floor space, but also maintains the overall harmony of indoor decoration to a certain extent. In addition, wall-mounted air conditioners can be applied to various house types and decoration styles. Whether it is a small or large house, whether it is a modern minimalist style or a Chinese classical style, wall-mounted air conditioners can complement the indoor decoration with their diverse appearance designs. In addition, wall-mounted air conditioners can also meet the different needs of different users for temperature and wind direction through various control methods. Therefore, wall-mounted air conditioners have become a common choice for many families and office spaces due to their convenient installation, wide applicability, moderate price and other characteristics.

[0065] In the related art, the first air guide surface of the front volute tongue of the wall-mounted air conditioner is a plane. Under the rotation of the cross-flow fan, the airflow directly impacts the first air guide surface of the front volute tongue, causing the first air guide surface of the front volute tongue to interfere with the airflow and generate a large amount of rotating noise, resulting in a poor user experience.

[0066] Therefore, based on this, the embodiments of the present application provide a wall-mounted air conditioner which can reduce the impact of airflow on the first air guide surface of the front volute tongue, reduce the mutual interference between the first air guide surface and the airflow, and reduce the rotating noise of the indoor unit.

[0067] The technical solutions will be further described below with reference to the embodiments and drawings.

[0068] Please refer to Figure 1 The embodiments of the present application provide a wall-mounted air conditioner. The wall-mounted air conditioner includes an indoor unit 100. The indoor unit 100 is an important component of the wall-mounted air conditioner. The indoor unit 100 performs air conditioning cycles by using a supply air system and related heat exchange systems. This cycle includes a series of processes, including air intake, heat exchange, airflow pushing, and temperature adjustment, to provide suitable temperature and air quality for indoor space. Through the supply air system, strong airflow is generated to suck indoor air into the ducted air conditioner. The sucked air then flows through the heat exchange system to absorb heat in the air, achieve cooling effect, and transfer heat to the refrigerant through the heat exchange process. The cold air after heat exchange is pushed back to the indoor space under the action of the supply air system, forming a cycle. Through such a cycle process, the temperature of the indoor space is adjusted, and the indoor air quality is improved through the circulation of airflow, providing a comfortable and healthy indoor environment for users. In this embodiment, the indoor unit 100 is hung on the indoor wall.

[0069] In combination with Figure 2 and Figure 3The indoor unit 100 comprises a casing 1, the casing 1 is provided with a casing air inlet 1a and a casing air outlet 1b, and a casing accommodating cavity 1c is formed in the casing 1, the casing air inlet 1a is used to guide the airflow into the interior of the casing 1, and the casing air outlet 1b is used to guide the airflow to the indoor.

[0070] As shown in Figure 3 The casing 1 comprises a back plate 11, which is used to connect the indoor unit 100 with the wall of the indoor.

[0071] Referring to Figure 3 The indoor unit 100 further comprises a heat exchanger 2, which is arranged in the casing accommodating cavity 1c and is used to exchange heat for the airflow flowing through the casing air inlet 1a. The heat exchanger 2 is a heat exchanger, which utilizes the characteristics that the liquid low-temperature refrigerant is easy to evaporate under low pressure, absorbs the heat of the cooled medium, and lowers the temperature of the surrounding air, so as to achieve the refrigeration effect. The cold air cooled by the heat exchanger 2 is sent back to the room through the air supply system, thereby providing a comfortable environment for the indoor. Especially in the hot summer, the refrigeration effect of the heat exchanger 2 can significantly reduce the indoor temperature and improve the living comfort of people.

[0072] The indoor unit 100 further comprises a cross-flow fan 3, which is arranged in the casing accommodating cavity 1c and located on the side of the heat exchanger 2 away from the casing air inlet 1a. The cross-flow fan 3 is used to introduce the airflow into the casing 1 through the casing air inlet 1a, and output the airflow outside through the casing air outlet 1b after the heat exchange of the heat exchanger 2. Through the cross-flow fan 3, the airflow can be introduced into the interior of the casing 1, so that the airflow is heated after passing through the heat exchanger 2, and then the heated airflow is sent back to the indoor under the action of the cross-flow fan 3.

[0073] The indoor unit 100 further comprises an electric heater 4, which is arranged in the casing accommodating cavity 1c and located between the heat exchanger 2 and the cross-flow fan 3, and the heat exchanger 2 partially surrounds the electric heater 4. The electric heater 4 is used to assist heating when the indoor unit 100 is in the heating mode, so as to ensure the heating capacity of the indoor unit 100 and achieve the required temperature of the user, thereby improving the comfort of the user.

[0074] The indoor unit 100 further comprises an air duct assembly 5, which is arranged in the casing accommodating cavity 1c, and an air duct is formed in the air duct assembly 5. The cross-flow fan 3 is arranged in the air duct, and the airflow after the heat exchange flows in the air duct under the action of the cross-flow fan 3, and then flows to the indoor through the casing air outlet 1b.

[0075] The air duct assembly 5 comprises a volute 51 arranged around the cross-flow fan 3 towards one side of the back plate 11. The volute 51 is one of the important components of the air duct assembly 5, and is used to guide the airflow. The volute 51 is designed with a specific volute shape, so that the airflow can rotate along the curved shape of the volute 51 when flowing through the air duct, gradually accelerating, and the kinetic energy of the airflow increases when flowing through the volute 51 due to the shape of the volute 51.

[0076] As shown in Figure 3 and Figure 4 , the air duct assembly 5 further comprises a front volute tongue 52 arranged along the radial direction of the cross-flow fan 3 and close to the air outlet 1b of the casing. The front volute tongue 52 is used to guide most of the airflow to the air outlet 1b of the casing, and a small part of the airflow is guided back to the cross-flow fan 3.

[0077] As shown in Figure 5 and Figure 7 , the front volute tongue 52 has a first air guide surface 521 towards one side of the cross-flow fan 3, and the first air guide surface 521 comprises a first air guide portion 5211 which is a concave curved surface recessed away from the cross-flow fan 3 (as shown in Figure 4 ).

[0078] As shown in Figure 4 , the first air guide surface 521 further comprises a second air guide portion 5212 connected to one end of the first air guide portion 5211 close to the air outlet 1b of the casing, and the second air guide portion 5212 is a convex curved surface protruding towards the air outlet 1b of the casing.

[0079] As shown in Figure 5 and Figure 7 , the air duct assembly 5 further comprises a plurality of protruding structures 53 arranged along the axial direction of the cross-flow fan 3 on the first air guide surface 521, and the protruding structures 53 have a second air guide surface 531 towards one side of the cross-flow fan 3.

[0080] As shown in Figure 4 , the second air guide surface 531 comprises a third air guide portion 5311 which is a concave curved surface recessed away from the cross-flow fan 3.

[0081] As shown in Figure 4 , the second air guide surface 531 further comprises a fourth air guide portion 5312 connected to one end of the third air guide portion 5311 close to the air outlet 1b of the casing, and the fourth air guide portion 5312 is a convex curved surface protruding towards the air outlet 1b of the casing.

[0082] Due to the process of airflow rotating under the driving of the cross-flow fan 3, the periodic impact on the first air guide surface 521 of the front volute tongue 52 will superimpose at a certain frequency and form larger rotating noise. In the related art, by setting the protruding structure 53 on the first air guide surface 521, the impact energy of the airflow can be dispersed by the protruding structure 53 when the airflow impacts the first air guide surface 521, which has a certain effect on reducing airflow impact, but the first air guide surface 521 is a plane, although the protruding structure 53 can disperse the impact energy of the airflow, due to the mismatch between the plane first air guide surface 521 and the flow direction of the airflow, the airflow will impact the first air guide surface 521 on the flow path, which will still cause larger rotating noise around the front volute tongue 52.

[0083] Therefore, in the embodiment, on the basis of setting the plurality of protruding structures 53 on the first air guide surface 521, the first air guide part 5211 of the first air guide surface 521 is set as a concave curved surface recessed away from the cross-flow fan 3, which means that the first air guide surface 521 of the concave curved surface matches the flow direction of the airflow, so that the airflow can flow back to the cross-flow fan 3 along the first air guide surface 521 under the guidance of the first air guide surface 521 in the process of flowing to the front volute tongue 52 under the action of the cross-flow fan 3, which reduces the impact of the airflow on the first air guide surface 521, and further reduces the rotating noise around the front volute tongue 52, thereby improving the user experience during use.

[0084] It should be noted that in the embodiment, the third air guide part 5311 of the second air guide surface 531 in the protruding structure 53 is a concave curved surface away from the cross-flow fan 3, so that the airflow can also flow back to the cross-flow fan 3 more smoothly under the guidance of the third air guide part 5311. The second air guide part 5212 of the first air guide surface 521 and the fourth air guide part 5312 of the second air guide surface 531 are convex curved surfaces protruding towards the casing air outlet 1b, which can also guide the airflow to flow reasonably in the air duct, reduce the vortex and resistance of the airflow in the air duct, and make the airflow more uniformly and stably sent out from the casing air outlet 1b.

[0085] In some embodiments, referring to Figure 4 , the first air guide part 5211 and the third air guide part 5311 correspond to the thickness direction T of the front volute tongue 52, and the second air guide part 5212 and the fourth air guide part 5312 correspond to the thickness direction T of the front volute tongue 52.

[0086] It should be noted that the correspondence of the first air guide part 5211 and the third air guide part 5311 along the thickness direction T of the front nodule tongue 52 means that the third air guide part 5311 is arranged on the first air guide part 5211 of the first air guide surface 521, that is, the basis of the arrangement of the third air guide part 5311 on the first air guide surface 521 also belongs to the first air guide part 5211. Similarly, the correspondence of the second air guide part 5212 and the fourth air guide part 5312 along the thickness direction of the front nodule tongue 52 means that the fourth air guide part 5312 is arranged on the second air guide part 5212 of the first air guide surface 521, that is, the basis of the arrangement of the fourth air guide part 5312 on the first air guide surface 521 also belongs to the second air guide part 5212.

[0087] The relative positions of the first air guide part 5211 and the third air guide part 5311, and the second air guide part 5212 and the fourth air guide part 5312 are related to the flow state of the airflow flowing through the first air guide part 5211 and the second air guide part 5212. When the positions of the first air guide part 5211 and the third air guide part 5311, and the positions of the second air guide part 5212 and the fourth air guide part 5312 do not correspond along the thickness direction of the front nodule tongue 52, the airflow cannot form an orderly flow path when flowing through the first air guide part 5211 and the second air guide part 5212, which can cause airflow separation or vortex, and generate noise.

[0088] Therefore, in the present embodiment, by arranging the first air guide part 5211 and the third air guide part 5311, and the second air guide part 5212 and the fourth air guide part 5312 to correspond along the thickness direction T of the front nodule tongue 52, the airflow can form an orderly flow path when flowing through the first air guide part 5211 and the second air guide part 5212, reducing airflow separation and vortex at the first air guide part 5211 and the second air guide part 5212, and further reducing noise during operation.

[0089] In some embodiments, referring to Figure 4 , along the direction of the first air guide part 5211 pointing to the second air guide part 5212, the distance between the first air guide part 5211 and the outer contour of the cross-flow fan 3 gradually decreases.

[0090] The gap between the first air guide part 5211 and the outer contour of the cross-flow fan 3 is related to the flow state of the airflow between the first air guide part 5211 and the outer contour of the cross-flow fan 3.

[0091] Therefore, the gradually decreasing distance between the first air guide part 5211 and the outer contour of the cross-flow fan 3 in the direction from the second air guide part 5212 to the first air guide part 5211 means that the flow channel of the air flow gradually narrows when the air flow passes through the area. The gradually changing flow channel can converge the air flow and adapt to the change of the air flow driven by the cross-flow fan 3 along the front volute tongue 52, so that the air flow can smoothly return to the cross-flow fan 3, reduce the disturbance to the operation of the cross-flow fan 3, and make the air flow driven by the cross-flow fan 3 more stable, thereby reducing the noise caused by the fluctuation of the air flow.

[0092] In some embodiments, as shown in FIG. 5, the minimum distance L between the first air guide part 5211 and the outer contour of the cross-flow fan 3 in the direction from the second air guide part 5212 to the first air guide part 5211 is 3-7 mm. Figure 4

[0093] It should be noted that the minimum distance between the first air guide part 5211 and the outer contour of the cross-flow fan 3 refers to the minimum distance in the process of changing the distance between the first air guide part 5211 and the outer contour of the cross-flow fan 3.

[0094] When the minimum distance L between the first air guide part 5211 and the outer contour of the cross-flow fan 3 is less than 3 mm, it means that the minimum distance is too small. Too small distance will cause the air flow to be hindered when passing through the area, resulting in that the air flow in the area cannot normally return to the cross-flow fan 3. When the minimum distance L between the first air guide part 5211 and the outer contour of the cross-flow fan 3 is greater than 7 mm, it means that the minimum distance is too large. Too large distance will cause the air flow to be unable to obtain sufficient acceleration effect when passing through the area, thereby causing part of the air flow to return to the cross-flow fan 3, and another part of the air flow to gather in the area, generating vortex and turbulence, thereby generating certain noise, which is not conducive to reducing the noise level of the indoor unit 100.

[0095] Therefore, when the minimum distance L between the first air guide part 5211 and the outer contour of the cross-flow fan 3 is 3-7 mm in the embodiment, the air flow can more smoothly return to the cross-flow fan 3, and this can provide a reasonable acceleration area for the air flow, so that the air flow has a certain speed before entering the cross-flow fan 3, thereby preventing the air flow from being unable to return to the cross-flow fan 3 due to low speed.

[0096] ​For example, the minimum distance L between the first air guide 5211 and the outer contour of the cross-flow fan 3 can be 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, or 7mm. When the minimum distance between the first air guide 5211 and the outer contour of the cross-flow fan 3 is 3mm, it ensures that the airflow returns to the cross-flow fan 3. When the minimum distance between the first air guide 5211 and the outer contour of the cross-flow fan 3 is 7mm, it prevents the airflow from converging between the first air guide 5211 and the outer contour of the cross-flow fan 3. When the minimum distance between the first air guide 5211 and the outer contour of the cross-flow fan 3 is 5mm, it ensures that the airflow can smoothly pass through the area between the first air guide 5211 and the cross-flow fan 3 and return to the cross-flow fan 3, while also avoiding noise caused by eddies and turbulence generated by airflow accumulation due to excessive distance, thus reducing the noise level of the indoor unit 100.

[0097] In some embodiments, see Figure 4 Along the direction from the fourth air guide 5312 to the third air guide 5311, the distance between the third air guide 5311 and the outer contour of the cross-flow fan 3 gradually decreases.

[0098] Similar to the spacing between the first air guide 5211 and the outer contour of the cross-flow fan 3 in the above embodiment, the spacing between the third air guide 5311 and the outer contour of the cross-flow fan 3 is also related to the airflow state. Therefore, in this embodiment, the gradually decreasing spacing between the third air guide 5311 and the outer contour of the cross-flow fan 3 can better guide the airflow, allowing it to flow along a predetermined path, reducing turbulence and eddies in the air duct, and improving airflow efficiency. Furthermore, as the spacing gradually decreases, the airflow will be subjected to a certain compression effect when passing through this area, and the airflow velocity will gradually increase, ensuring that the airflow can return to the cross-flow fan 3.

[0099] In some embodiments, such as Figure 4 As shown, along the direction from the fourth air guide 5312 to the third air guide 5311, the minimum distance between the third air guide 5311 and the outer contour of the cross-flow fan 3 is 3mm to 7mm.

[0100] It should be noted that the minimum distance between the third air guide section 5311 and the outer contour of the cross-flow fan 3 refers to the minimum distance during the process of changing the distance between the third air guide section 5311 and the outer contour of the cross-flow fan 3. For example... Figure 4 As shown, the minimum distance between the third air guide 5311 and the outer contour of the cross-flow fan 3 is equal to the minimum distance L between the first air guide 5211 and the outer contour of the cross-flow fan 3.

[0101] When the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is less than 3 mm, it means that the minimum distance is too small, which will cause the air flow to be greatly hindered when passing through this area, resulting in the air flow in this area unable to normally return to the cross-flow fan 3; when the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is greater than 7 mm, it means that the minimum distance is too large, which will cause the air flow to be unable to obtain sufficient acceleration effect when passing through this area, thereby causing part of the air flow to return to the cross-flow fan 3, and another part of the air flow to gather in this area, generating vortex and turbulence, thereby generating certain noise, which is not conducive to reducing the noise level of the indoor unit 100.

[0102] Therefore, when the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is 3 mm to 7 mm in the embodiment, the air flow can smoothly return to the cross-flow fan 3, and a reasonable acceleration area can also be provided for the air flow, so that the air flow has a certain speed before entering the cross-flow fan 3, thereby preventing the air flow from being unable to return to the cross-flow fan 3 due to low speed.

[0103] Exemplarily, the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 can be 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 5.5 mm, 6 mm, 6.5 mm or 7 mm. When the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is 3 mm, it can ensure that the air flow returns to the cross-flow fan 3; when the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is 7 mm, it can avoid the air flow gathering between the third air guide part 5311 and the outer contour of the cross-flow fan 3; when the minimum distance between the third air guide part 5311 and the outer contour of the cross-flow fan 3 is 5 mm, it can not only ensure that the air flow can smoothly pass through the area between the third air guide part 5311 and the cross-flow fan 3 to return to the cross-flow fan 3, but also avoid the noise generated by vortex and turbulence caused by air flow gathering due to too large distance, thereby reducing the noise level of the indoor unit 100.

[0104] It can be understood that the first air guide part 5211 of the first air guide surface 521 and the third air guide part 5311 of the second air guide surface 531 form two air ducts with the outer contour of the cross-flow fan 3, and the air flow is dispersed through the two air ducts to prevent the air flow from causing a large impact on the first air guide surface 521 and the second air guide surface 531, thereby reducing the rotating noise of the indoor unit 100.

[0105] In some embodiments, referring to Figure 6 and Figure 8 , along the direction in which the fourth air guide part 5312 points to the third air guide part 5311, the distance between adjacent two third air guide parts 5311 gradually increases.

[0106] In this way, the gradually increasing spacing between the two adjacent third air guiding portions 5311 causes the air flow to gradually decrease in resistance when passing between the two adjacent third air guiding portions 5311, and the impact force of the air flow is also reduced. This helps to reduce the noise generated by the air flow impact, and reduces the noise level when the indoor unit 100 is operating. Furthermore, the increasing spacing helps to make the air flow more stable, thereby reducing the generation of turbulence and reducing noise.

[0107] In some embodiments, referring to Figure 6 and Figure 8 , the minimum spacing H between the two adjacent third air guiding portions 5311 in the direction from the fourth air guiding portion 5312 to the third air guiding portion 5311 is 0.5 mm to 10 mm.

[0108] When the minimum spacing H between the two adjacent third air guiding portions 5311 is less than 0.5 mm, the air flow can not be able to enter the region with the minimum spacing between the two third air guiding portions 5311, causing the region with the minimum spacing between the two third air guiding portions 5311 to be in a vacuum state. During the air flow, the vacuum region will generate a howling sound, increasing the noise level of the indoor unit 100. When the minimum spacing H between the two adjacent third air guiding portions 5311 is greater than 10 mm, the air flow cannot obtain sufficient acceleration effect when passing between the two adjacent third air guiding portions 5311, which will cause the flow speed of the air flow in this region to decrease. Furthermore, due to the excessive spacing between the two adjacent third air guiding portions 5311, the dispersion effect of the third air guiding portion 5311 of the protruding structure 53 on the air flow impact will be reduced, resulting in an undesirable noise reduction effect.

[0109] Therefore, the minimum spacing H between the two adjacent third air guiding portions 5311 is set to 0.5 mm to 10 mm in this embodiment, which can ensure that the air flow has a proper flow space between the two adjacent third air guiding portions 5311, so that the air flow can be more evenly distributed in the entire air duct, helping to avoid excessive concentration or dispersion of the air flow, so that the air flow can better cover each region in the air duct, reducing vortex and dead angles of the air flow in the air duct. Furthermore, the minimum spacing range of 0.5 mm to 10 mm can reduce the impact and collision of the air flow between the two adjacent third air guiding portions 5311, thereby reducing the noise generated by the air flow impact.

[0110] Exemplarily, the minimum spacing H between the two adjacent third air guiding portions 5311 can be 0.5 mm, 3 mm, 5 mm, 7 mm, or 10 mm.

[0111] In some embodiments, referring to Figure 4 , the curvature of the first air guiding portion 5211 is greater than the curvature of the third air guiding portion 5311.

[0112] It should be noted that, since the first air guide part 5211 and the third air guide part 5311 are both concave curved surfaces recessed in a direction away from the cross-flow fan 3, the curvature represents the bending degree of the curved surface.

[0113] The curvature of the first air guide part 5211 is greater than that of the third air guide part 5311, which means that the first air guide part 5211 is more bent and can more effectively guide the airflow to flow along the predetermined path. When the airflow flows from the fourth air guide part 5312 to the third air guide part 5311, the large curvature of the first air guide part 5211 can ensure that the airflow smoothly enters the air duct and flows along the first air guide part 5211, reducing the turbulence and vortex phenomenon of the airflow in the air duct, thereby reducing the noise generated by the turbulence or vortex of the airflow.

[0114] In some embodiments, the curvature of the fourth air guide part 5312 is 66-250. When the curvature of the fourth air guide part 5312 is less than 66, it means that the bending degree of the fourth air guide part 5312 is small, and the airflow flows to the cabinet air outlet 1b under the guidance of the fourth air guide part 5312. The small bending degree of the fourth air guide part 5312 can cause the airflow to be unable to be guided, and the airflow can interfere with the fourth air guide part 5312, causing the airflow to be unable to normally flow to the cabinet air outlet 1b, thereby affecting the stable air outlet of the indoor unit 100. When the curvature of the fourth air guide part 5312 is greater than 250, it means that the bending degree of the fourth air guide part 5312 is too large, and the airflow passing through the fourth air guide part 5312 will be subjected to a large centrifugal force, causing the airflow speed to decrease. This can cause the airflow to have a low speed when flowing out of the cabinet air outlet 1b, thereby reducing the air supply amount and air supply distance of the indoor unit 100, and affecting the refrigeration or heating effect. Moreover, under the action of a large centrifugal force, the airflow can become unevenly distributed in the air duct. Some areas of the airflow can be too concentrated, while other areas of the airflow can be relatively weak, which can cause the air outlet of the indoor unit 100 to be uneven.

[0115] Therefore, the curvature of the fourth air guide part 5312 is 66-250, which ensures that the airflow can stably flow to the indoor unit through the cabinet air outlet 1b under the guidance of the fourth air guide part 5312, and ensures the stable air outlet and uniformity of the air outlet of the indoor unit 100.

[0116] It should be noted that the front volute tongue 52 in this embodiment is a curved plate structure, and the surface of the side of the front volute tongue 52 away from the cross-flow fan 3 is adapted to the first air guide surface 521. That is, the surface of the side of the front volute tongue 52 away from the cross-flow fan 3 corresponds to the first air guide part 5211, which is a convex curved surface protruding in a direction close to the cross-flow fan 3, and the surface of the side of the front volute tongue 52 away from the cross-flow fan 3 corresponds to the second air guide part 5212, which is a concave curved surface recessed in a direction away from the cross-flow fan 3. Of course, the front volute tongue 52 can have other shapes, which are not limited in this embodiment.

[0117] In some embodiments, the front volute tongue 52 is detachably connected with the shell 1.

[0118] The detachable connection design makes the front volute tongue 52 can be easily detached from the shell 1, thereby facilitating the cleaning and maintenance of the front volute tongue 52. During the long-term use of the indoor unit 100, dust and other impurities are easy to accumulate in the front volute tongue 52, affecting the normal operation and efficiency of the indoor unit 100. By detaching the front volute tongue 52, cleaning and inspection can be more easily performed, ensuring good performance of the indoor unit 100. Moreover, if the front volute tongue 52 is damaged or needs to be upgraded, the detachable connection makes the replacement process more convenient.

[0119] It should be noted that the detachable connection between the front volute tongue 52 and the shell 1 can be a screw thread connection or other connection manner, which is not specifically limited in the present embodiment.

[0120] In some embodiments, referring to Figure 9 and Figure 10 , the indoor unit 100 further comprises a first buckling member 61 and a second buckling member 62, the first buckling member 61 is arranged on the front volute tongue 52, the second buckling member 62 is arranged on the shell 1, and the first buckling member 61 is buckled and connected with the second buckling member 62.

[0121] Through the buckling connection of the first buckling member 61 and the second buckling member 62, the front volute tongue 52 and the shell 1 can be quickly assembled without using fasteners such as screws and nuts, greatly shortening the assembly time, improving the production efficiency, and reducing the production cost. When the air conditioner indoor unit needs to be maintained, cleaned or replaced parts, the buckling connection design makes the front volute tongue 52 can be easily detached from the shell 1, without using tools to detach the fasteners, saving the disassembly time and improving the maintenance efficiency.

[0122] It should be noted that, as shown in Figure 9 and Figure 10 , the first buckling member 61 can be a hook or a buckle, and the second buckling member 62 can be a clamping groove, and the hook and the clamping groove are clamped to achieve the buckling connection of the front volute tongue 52 and the shell 1. Of course, the first buckling member 61 can also be a clamping groove, and the second buckling member 62 can be a hook or a buckle, which is not specifically limited in the present embodiment.

[0123] In some embodiments, as shown in Figure 9 , the first buckling member 61 comprises a first sub-buckling member 611, the first sub-buckling member 611 is arranged on the surface of the front volute tongue 52 away from the first air guiding surface 521, and corresponds to the end of the first air guiding part 5211 away from the second air guiding part 5212.

[0124] The first fastening member 61 further comprises a second sub-fastening member 612, which is arranged on the surface of the front volute tongue 52 away from the first air guide surface 521 and corresponds to the end of the second air guide part 5212 away from the first air guide part 5211.

[0125] In this way, the first sub-fastening member 611 ensures the connection stability of the front volute tongue 52 in the vertical direction after the front volute tongue 52 is installed on the shell 1, preventing the front volute tongue 52 from shaking in the vertical direction. The second sub-fastening member 612 ensures the connection stability of the front volute tongue 52 in the thickness direction of the shell 1 after the front volute tongue 52 is installed on the shell 1, preventing the front volute tongue 52 from being detached or shaken in the thickness direction of the shell 1, thereby ensuring the connection stability between the front volute tongue 52 and the shell 1.

[0126] In some embodiments, referring to Figure 10 and Figure 11 , the first fastening member 61 comprises a plurality of first fastening members 61, which are arranged on the surface of the front volute tongue 52 away from the first air guide surface 521 in the axial direction of the cross-flow fan 3. The second fastening member 62 comprises a plurality of second fastening members 62, which are arranged corresponding to the plurality of first fastening members 61.

[0127] The arrangement of the plurality of first fastening members 61 and the plurality of second fastening members 62 makes the connection between the front volute tongue 52 and the shell 1 more stable. During the operation of the indoor unit 100, the cross-flow fan 3 will generate vibration and airflow impact, and the plurality of fastening members can disperse these forces and reduce the stress on a single fastening member, thereby improving the stability of the connection and preventing the front volute tongue 52 from loosening or falling off. Even if a certain fastening member is damaged or fails, other fastening members can still maintain the connection between the front volute tongue 52 and the shell 1, thereby improving the reliability and safety of the system.

[0128] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A wall-mounted air conditioner characterized by comprising: include: Indoor unit, the indoor unit includes: A housing, wherein the housing is provided with a housing air inlet and a housing air outlet, and a housing receiving cavity is formed inside the housing, the housing comprising: A rear panel for connection to an interior wall; A heat exchanger is disposed within the housing cavity and is used to exchange heat with the airflow passing through the housing inlet. A cross-flow fan is disposed in the housing cavity and located on the side of the heat exchanger away from the housing air inlet. The cross-flow fan is used to introduce airflow into the housing from the housing air inlet, and after heat exchange by the heat exchanger, it is delivered to the room from the housing air outlet. An electric heater is disposed within the housing cavity and located between the heat exchanger and the cross-flow fan; A duct assembly is disposed within the housing cavity, and a duct is formed within the duct assembly. A cross-flow fan is disposed within the duct. The duct assembly includes: A volute, the volute being disposed around the side of the cross-flow fan facing the rear panel; A front volute, wherein the front volute and the volute are radially spaced apart along the cross-flow fan and positioned near the air outlet of the housing, the front volute having a first air guide surface on the side facing the cross-flow fan, the first air guide surface comprising: First air guide section; The second air guide section is connected to the end of the first air guide section near the air outlet of the housing, and the second air guide section is a convex curved surface protruding towards the air outlet of the housing. Multiple protruding structures are spaced apart along the axial direction of the cross-flow fan on the first air guide surface. Each protruding structure has a second air guide surface on the side facing the cross-flow fan. The second air guide surface includes: Third air guide section; The fourth air guide is connected to the end of the third air guide near the air outlet of the housing, and the fourth air guide is a convex curved surface protruding towards the air outlet of the housing; The first air guide portion is a concave curved surface that is recessed in the direction away from the cross-flow fan, and the third air guide portion is a concave curved surface that is recessed in the direction away from the cross-flow fan.

2. The wall-mounted air conditioner according to claim 1, wherein The first air guide portion and the third air guide portion correspond to each other along the thickness direction of the front volute tongue, and the second air guide portion and the fourth air guide portion correspond to each other along the thickness direction of the front volute tongue.

3. The wall surface-mounted type air conditioner according to claim 1, wherein Along the direction from the second air guide to the first air guide, the distance between the first air guide and the outer contour of the cross-flow fan gradually decreases.

4. The wall-mounted air conditioner according to claim 3, wherein Along the direction from the second air guide to the first air guide, the minimum distance between the first air guide and the outer contour of the cross-flow fan is 3mm to 7mm.

5. The wall surface-mounted air conditioner according to claim 1, wherein Along the direction from the fourth air guide to the third air guide, the distance between the third air guide and the outer contour of the cross-flow fan gradually decreases.

6. The wall-mounted air conditioner according to claim 5, wherein Along the direction from the fourth air guide to the third air guide, the minimum distance between the third air guide and the outer contour of the cross-flow fan is 3mm to 7mm.

7. The wall surface-mounted type air conditioner according to claim 1, wherein Along the direction from the fourth air guide to the third air guide, the distance between two adjacent third air guides gradually increases.

8. The wall-mounted air conditioner according to claim 7, wherein, The minimum distance between two adjacent third air guiding portions in the direction pointing to the third air guiding portion from the fourth air guiding portion is 0.5mm-10mm.

9. The wall surface-mounted type air conditioner according to claim 1, wherein The curvature of the first air guiding portion is greater than the curvature of the third air guiding portion.

10. The wall surface-mounted air conditioner according to claim 1, wherein The front volute tongue is detachably connected with the shell.

11. The wall-mounted air conditioner according to claim 10, wherein, The indoor unit further comprises: A first fastening member is arranged on the front volute tongue. A second fastening member is arranged on the shell, and the first fastening member is detachably connected with the second fastening member.

12. The wall-mounted air conditioner according to claim 11, wherein, The first fastening member comprises: A first sub-fastening member is arranged on the surface of the front volute tongue away from the first air guiding surface and corresponds to one end of the first air guiding portion away from the second air guiding portion. A second sub-fastening member is arranged on the surface of the front volute tongue away from the first air guiding surface and corresponds to one end of the second air guiding portion away from the first air guiding portion.

13. The wall-mounted air conditioner according to claim 11, wherein, The first fastening member comprises a plurality of first fastening members which are arranged on the surface of the front volute tongue away from the first air guiding surface in the axial direction of the cross-flow fan. The second fastening member comprises a plurality of second fastening members which correspond to the plurality of first fastening members.

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