Air conditioner

Abstract

The utility model discloses a kind of air conditioners, air conditioner includes shell assembly, fan assembly and function module, shell assembly is formed with air inlet and air outlet, fan assembly is located in shell assembly and include volute, wind wheel and driving motor, at least part of wind wheel is located in volute, volute has front volute tongue, the end surface of front volute tongue close to air inlet is first end surface, first end surface is formed with gap, function module is located in shell assembly and located in the upstream side of volute, function module and front volute tongue are arranged along first direction, first direction is perpendicular to the axial direction of wind wheel, the projection of function module on reference surface is first projection, the projection of gap on reference surface is second projection, first projection and second projection at least part coincide, reference surface is perpendicular to first direction.According to the air conditioner of the utility model, the air outlet uniformity on wind wheel axial direction can be balanced, and then the surge noise caused by uneven air outlet can be avoided, to improve the tranquility of air conditioner operation.

Description

Technical Field

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

[0002] As people's living standards improve, air conditioners have gradually entered thousands of households, becoming an important household appliance. With the continuous development of the air conditioning industry, the functions of air conditioners have also increased. However, due to limitations such as the size of the air conditioner itself, some functional modules, such as the voice control module, occupy a portion of the air intake channel. This increases the air intake resistance in the corresponding area, leading to uneven airflow and consequently, surging noise during operation. Therefore, improvements are needed. Utility Model Content

[0003] The first aspect of this utility model proposes an air conditioner that has the advantage of avoiding surge noise caused by uneven airflow.

[0004] An air conditioner according to a first aspect of the present invention includes: a housing assembly having an air inlet and an air outlet;

[0005] A fan assembly, disposed within the housing assembly, includes a volute, a rotor, and a drive motor. At least a portion of the rotor is disposed within the volute. The drive motor drives the rotor to rotate. The volute has a front volute tongue, and the end face of the front volute tongue near the air inlet is a first end face, with a notch formed on the first end face. A functional module, disposed within the housing assembly and located upstream of the volute, is arranged along a first direction with the front volute tongue. The first direction is perpendicular to the axial direction of the rotor. The projection of the functional module onto a reference plane is a first projection, and the projection of the notch onto the reference plane is a second projection. At least a portion of the first projection and the second projection coincide. The reference plane is perpendicular to the first direction.

[0006] According to the first aspect of the present invention, the air conditioner has a notch on the first end face corresponding to the position of the functional module, which reduces the height of the first end face corresponding to the position of the functional module. This reduces the resistance of the airflow at the notch position to the airflow passing through the functional module and entering the volute, thereby balancing the uniformity of airflow in the axial direction of the impeller and avoiding surge noise caused by uneven airflow, thus improving the quietness of the air conditioner operation.

[0007] According to some embodiments of the present invention, the axis of the impeller extends in the left-right direction, the air inlet is located at the top of the housing assembly, the air outlet is located at the lower front part of the housing assembly, and the functional module is located at the front end of the air inlet.

[0008] According to some embodiments of the present invention, the depth of the notch recessed into the first end face is in the range of 1mm to 2mm.

[0009] According to some embodiments of the present invention, a first baffle rib extending along the axial direction of the wind turbine is formed on the first end face, and the first baffle rib and the notch are arranged along the axial direction of the wind turbine.

[0010] According to some embodiments of the present invention, the depth of the notch recessed into the first end face is less than the height of the first baffle protruding from the first end face; and / or, the height of the first baffle protruding from the first end face ranges from 3mm to 5mm.

[0011] According to some embodiments of the present invention, at least some of the first baffles have different lengths along the axial direction of the wind turbine.

[0012] According to some embodiments of the present invention, the volute has a rear volute tongue, and the end face of the rear volute tongue near the air inlet is a second end face, and a second baffle extending along the axial direction of the impeller is provided on the second end face.

[0013] According to some embodiments of the present invention, the volute has a rear volute tongue, and the rear volute tongue has a protrusion on its inner wall surface facing the impeller.

[0014] According to some embodiments of the present invention, the protrusion is located at one end of the rear volute tongue near the air inlet and at the other end of the rear volute tongue near the drive motor.

[0015] According to some embodiments of the present invention, the volute has a rear volute tongue, and an air guiding structure is provided on the inner wall surface of the rear volute tongue. The air guiding structure is located at one end of the rear volute tongue near the air outlet and at the other end of the rear volute tongue near the drive motor. The air guiding structure is used to guide the airflow away from the drive motor.

[0016] According to some embodiments of the present invention, along the axial direction of the wind turbine, the side of the wind guide structure away from the drive motor is formed as a guide surface, the guide surface is set at an angle to the axial direction of the wind turbine, and the guide surface extends downward at an angle in the direction away from the drive motor.

[0017] According to some embodiments of this utility model, the air guiding structure is plate-shaped.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1This is a front view of an air conditioner according to an embodiment of the present utility model;

[0020] Figure 2 This is a top view of an air conditioner according to an embodiment of the present utility model;

[0021] Figure 3 This is a cross-sectional schematic diagram of the functional modules of the air conditioner according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of the chassis and volute of an air conditioner according to an embodiment of the present utility model;

[0023] Figure 5 yes Figure 4 Enlarged view of region A in the middle;

[0024] Figure 6 yes Figure 4 Enlarged view of region B in the middle;

[0025] Figure 7 yes Figure 4 Enlarged view of region C in the middle;

[0026] Figure 8 This is a schematic diagram of the chassis and volute of an air conditioner according to an embodiment of the present utility model from another angle;

[0027] Figure 9 yes Figure 8 A magnified view of region D in the middle.

[0028] Figure label:

[0029] 100. Air conditioner;

[0030] 1. Housing assembly; 11. Air inlet; 12. Air outlet; 13. Chassis;

[0031] 2. Volute; 21. Front volute tongue; 211. First end face; 212. Notch; 213. First baffle rib; 22. Rear volute tongue; 221. Second end face; 222. Second baffle rib; 223. Protrusion; 23. Air guide structure; 231. Air guide surface;

[0032] 3. Fan wheel; 4. Functional module; 5. Heat exchanger. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] The following disclosure provides numerous different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0035] The air conditioner 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0036] like Figures 1 to 5 As shown, the air conditioner 100 according to an embodiment of the present invention includes: a housing assembly 1, a fan assembly, and a functional module 4. The housing assembly 1 has an air inlet 11 and an air outlet 12. The fan assembly is disposed within the housing assembly 1 and includes a volute 2, a fan wheel 3, and a drive motor (not shown). At least a portion of the fan wheel 3 is disposed within the volute 2. The drive motor is used to drive the fan wheel 3 to rotate. The volute 2 has a front volute tongue 21. The end face of the front volute tongue 21 near the air inlet 11 is a first end face 211. A notch 212 is formed on the first end face 211. The functional module 4 is disposed within the housing assembly 1 and located on the upstream side of the volute 2. The functional module 4 and the front volute tongue 21 are arranged along a first direction, which is perpendicular to the axial direction of the fan wheel 3. The projection of the functional module 4 on a reference plane is a first projection, and the projection of the notch 212 on the reference plane is a second projection. At least a portion of the first projection and the second projection coincide. The reference plane is perpendicular to the first direction.

[0037] In other words, a notch 212 is provided at least on the first end face 211 at the position corresponding to the functional module 4. Here, the position on the first end face 211 corresponding to the functional module 4 refers to the position on the first end face 211 where the airflow entering through the air inlet 11 flows through the functional module 4 and continues towards the volute 2. It can be understood that after the drive motor drives the impeller 3 to rotate, it causes the air outside the air conditioner 100 to enter the housing assembly 1 through the air inlet 11 and flow towards the volute 2. Since the functional module 4, located upstream of the volute 2, is installed inside the housing assembly 1, the functional module 4 will obstruct the airflow entering through the air inlet 11, resulting in a reduction in the airflow at the position corresponding to the functional module 4 on the front volute tongue 21.

[0038] Therefore, by setting a notch 212 on the first end face 211 corresponding to the position of the functional module 4, the height of the first end face 211 corresponding to the position of the functional module 4 is reduced, which can reduce the resistance of the airflow flowing through the functional module 4 and into the volute 2 at the notch 212 position. That is, by setting the notch 212, the uneven airflow caused by the increased local airflow resistance of the functional module 4 can be improved, thereby balancing the uniformity of airflow in the axial direction of the impeller 3, and thus avoiding the surge noise caused by uneven airflow, so as to improve the quietness of the air conditioner 100 operation.

[0039] According to the embodiment of the present utility model, the air conditioner 100 has a notch 212 provided on the first end face 211 at the position corresponding to the functional module 4, thereby reducing the height of the position of the first end face 211 corresponding to the functional module 4. This reduces the resistance of the airflow passing through the functional module 4 and entering the volute 2 at the notch 212 position, thereby balancing the uniformity of airflow in the axial direction of the impeller 3. This can avoid the surge noise caused by uneven airflow, thereby improving the quietness of the air conditioner 100 operation.

[0040] In a specific example, functional module 4 is a voice module. For instance, the voice module can receive user voice commands to execute corresponding operating modes. That is, the user can control the air conditioner 100 via voice, thereby improving the ease of use of the air conditioner 100. In addition, a heat exchanger 5 is also provided inside the casing assembly 1 to regulate the heat exchange of the flowing air.

[0041] According to some embodiments of this utility model, the axis of the impeller 3 extends in the left-right direction, the air inlet 11 is located at the top of the housing assembly 1, the air outlet 12 is located at the lower front part of the housing assembly 1, and the functional module 4 is located at the front end of the air inlet 11. That is, the air conditioner 100 is a wall-mounted air conditioner, and the impeller 3 is a cross-flow impeller 3.

[0042] In other words, the notch 212 is set at the position corresponding to the functional module 4 in the left and right direction on the first end face 211. The functional module 4 is located above the notch 212. When the airflow flows from the air inlet 11 through the functional module 4 and flows toward the notch 212, the resistance of the airflow entering the volute 2 through the notch 212 can be reduced. This can effectively avoid the problem of uneven airflow in the left and right direction caused by the functional module 4 resisting the airflow. This can improve the uniformity of airflow in the left and right direction of the air conditioner 100, thereby reducing surge noise and improving the quietness of the air conditioner 100 operation.

[0043] In a specific example, functional module 4 is located diagonally above and to the front of the volute tongue 21, that is, the first direction has an angle with both the vertical direction and the front-back direction. Specifically, the distance between the first end face 211 and the second end face 221 in the front-back direction is less than the width of the air inlet 11 in the front-back direction. The rear end of the air inlet 11 is located diagonally above and to the rear of the second end face 221, and the front section of the air inlet 11 is located diagonally above and to the front of the first end face 211. Therefore, when the impeller 3 rotates, the airflow entering through the front end of the air inlet 11 flows to the front of the volute tongue 21 and enters the volute housing 2 along the first end face 211. The airflow entering through the rear end of the air inlet 11 flows to the rear of the volute tongue 22 and enters the volute housing 2 along the second end face 221. In addition, the housing assembly 1 includes a chassis 13, and the volute housing 2 is disposed on the chassis 13 and integrally formed with the chassis 13.

[0044] According to some embodiments of this utility model, the depth of the notch 212 recessed into the first end face 211 ranges from 1mm to 2mm. It can be understood that the greater the depth of the notch 212 recess, the smaller the impact on the overall structural strength of the front volute 21, but the greater the resistance of the notch 212 to the airflow; conversely, the smaller the depth of the notch 212 recess, the smaller the resistance of the notch 212 to the airflow, but the greater the impact on the overall structural strength of the front volute 21. Therefore, by controlling the depth of the notch 212 recess within the range of 1mm to 2mm, the impact on the structural strength of the front volute 21 can be controlled while reducing the resistance of the notch 212 to the airflow, thus ensuring the uniformity of airflow along the axial direction of the impeller 3. The depth of the notch 212 recess can be 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, etc., and no specific limitation is made here.

[0045] According to some embodiments of this utility model, such as Figures 4 to 6 As shown, a first baffle 213 extending axially along the impeller 3 is formed on the first end face 211, and the first baffle 213 and the notch 212 are arranged axially along the impeller 3. That is, on the first end face 211, the notch 212 is provided with a first baffle 213 on at least one side along the axial direction of the impeller 3. It can be understood that by providing the protruding structure of the first baffle 213 on the first end face 211, when the airflow enters the volute 2 through the position of the first baffle 213, the first baffle 213 can generate a certain resistance to the airflow, thereby reducing the gas velocity and air volume passing through the first baffle 213.

[0046] In other words, the air volume at a specified location can be increased or decreased by flexibly adjusting the positions of the notch 212 and the first baffle 213 according to the position of the functional module 4, thereby eliminating the uneven airflow caused by the functional module 4 blocking the airflow. That is, the air volume can be reduced by setting the first baffle 213 at a location with a large air volume, and the air volume can be increased by setting the notch 212 at a location with a small air volume, so as to balance the uniformity of the airflow in the axial direction of the impeller 3.

[0047] Furthermore, when the impeller 3 rotates, a vortex will be generated at the front volute 21. That is, some airflow flows along the rear volute 22 towards its upstream side and returns to the impeller 3. A notch 212 and a first baffle 213 are provided on the first end face 211, creating a height difference at different positions along the axial direction of the impeller 3 at the end of the rear volute 22 near the air inlet 11. Therefore, along the axial direction of the impeller 3, part of the airflow in the vortex first leaves the rear volute 22 at the notch 212 and enters the impeller 3, while another part continues to move along the rear volute 22 towards the inner wall of the impeller 3, then leaves the rear volute 22 at the first baffle 213 and enters the impeller 3. This allows the vortex airflow to enter the impeller 3 in batches, creating a return flow time difference, reducing the intensity of the airflow, minimizing airflow disturbance to the impeller 3, and reducing the operating noise of the impeller 3.

[0048] According to some embodiments of this utility model, the depth of the notch 212 recessed into the first end face 211 is less than the height of the first baffle 213 protruding from the first end face 211. That is, the depth of the notch 212 is controlled within a range less than the height of the first baffle 213. Therefore, the impact of excessive depth of the notch 212 on the overall structural strength of the front volute tongue 21 can be better avoided, so as to ensure that the front volute tongue 21 has sufficient strength.

[0049] According to some embodiments of this utility model, the height of the first baffle 213 protruding from the first end face 211 ranges from 3mm to 5mm. If the height of the first baffle 213 protruding from the first end face 211 is too low, it cannot effectively increase the resistance of the first baffle 213 to the airflow. If the height of the first baffle 213 protruding from the first end face 211 is too high, it obstructs too much airflow, resulting in a reduction in the overall airflow of the air conditioner 100. Therefore, by controlling the height of the first baffle 213 within the range of 3mm to 5mm, the uniformity of the airflow from the first baffle 213 can be ensured while maintaining the overall airflow of the air conditioner 100. The height of the first baffle 213 can be 3mm, 3.2mm, 3.5mm, 3.7mm, 4mm, 4.3mm, 4.5mm, 4.7mm, 5mm, etc., and no specific limitation is made here.

[0050] According to some embodiments of this utility model, the depth of the notch 212 recessed into the first end face 211 is less than the height of the first baffle 213 protruding from the first end face 211, and the height of the first baffle 213 protruding from the first end face 211 ranges from 3mm to 5mm. Therefore, the impact of excessively deep notch 212 on the overall structural strength of the front volute 21 can be effectively avoided. Furthermore, while ensuring the uniformity of airflow from the first baffle 213, the overall airflow of the air conditioner 100 can be guaranteed.

[0051] According to some embodiments of this utility model, such as Figure 4 As shown, at least some of the first baffle 213 have different lengths along the axial direction of the impeller 3. Therefore, the length and position of the first baffle 213 can be flexibly set according to the layout of the functional modules 4, etc. of the air conditioner 100, thereby ensuring the accuracy of the first baffle 213 in adjusting the uniformity of the air outlet.

[0052] According to some embodiments of this utility model, such as Figure 8 and Figure 9 As shown, the volute 2 has a rear volute tongue 22, and the end face of the rear volute tongue 22 near the air inlet 11 is a second end face 221. A second baffle 222 extending axially along the impeller 3 is provided on the second end face 221. It can be understood that by providing the protruding structure of the second baffle 222 on the second end face 221, when the airflow enters the volute 2 through the second baffle 222, the second baffle 222 can generate a certain resistance to the airflow entering through the rear end of the air inlet 11, thereby reducing the gas velocity and airflow volume at the second baffle 222. Therefore, by providing the second baffle 222 on the second end face 221, the uniformity of the airflow can be balanced by controlling the resistance of the flowing air, thereby improving the quietness of the air conditioner 100 operation.

[0053] It should be noted that the airflow resistance at the point where the same structure as the notch 212 is provided on the second end face 221 can be reduced by providing the same structure on the volute tongue 22 after the airflow passes through. In other words, by lowering or raising the height of the second end face 221, the air intake resistance of the volute tongue 22 near the air inlet 11 can be adjusted in the axial direction of the impeller 3, thereby improving the uniformity of airflow from the air conditioner 100 in the axial direction of the impeller 3. This can avoid surge noise caused by uneven airflow and improve the quietness of the air conditioner 100 during operation.

[0054] According to some embodiments of this utility model, such as Figure 8 and Figure 9As shown, the volute 2 has a rear volute tongue 22, and a protrusion 223 is provided on the inner wall surface of the rear volute tongue 22 facing the impeller 3. Therefore, by providing the protrusion 223, the distance between the protrusion 223 and the impeller 3 can be reduced, thereby reducing the flow area at the location where the protrusion 223 is provided, and thus increasing the airflow velocity by reducing the flow area. In other words, according to the wind speed difference at different positions along the axial direction of the impeller 3, the wind speed in local areas can be increased by flexibly setting the protrusion 223, thereby better balancing the uniformity of the airflow.

[0055] According to some embodiments of this utility model, the protrusion 223 is located at one end of the rear volute 22 near the air inlet 11 and at the other end of the rear volute 22 near the drive motor. The wind speed on the side of the impeller 3 closest to the drive motor along the axial direction is lower than the wind speed at the center. Therefore, by placing the protrusion 223 at the end of the rear volute 22 near the drive motor, the wind speed in the area of ​​the impeller 3 near the drive motor can be effectively increased, ensuring the uniformity of wind speed at different positions along the axial direction of the impeller 3. Furthermore, placing the protrusion 223 at the end of the rear volute 22 near the air inlet 11 reduces the manufacturing difficulty of the protrusion 223.

[0056] In a specific example, along the axial direction of the impeller 3, the second baffle 222 is located on the side of the protrusion 223 away from the drive motor. The second baffle 222 can reduce the wind speed in the air duct on the side of the protrusion 223 away from the drive motor, and the protrusion 223 can increase the wind speed in the area of ​​the second baffle 222 near the drive motor, so as to further reduce the wind speed difference at different positions of the impeller 3 along the axial direction, thereby improving the uniformity of the airflow.

[0057] According to some embodiments of this utility model, such as Figure 7 and Figure 8 As shown, the volute 2 has a rear volute tongue 22, and an air guide structure 23 is provided on the inner wall surface of the rear volute tongue 22. The air guide structure 23 is located at the end of the rear volute tongue 22 near the air outlet 12 and at the end of the rear volute tongue 22 near the drive motor. The air guide structure 23 is used to guide the airflow away from the drive motor. That is, the air guide structure 23 is used to guide the airflow from the end of the air outlet 12 near the drive motor toward the center position of the air outlet 12 along the axial direction of the impeller 3. As a result, the low wind speed area at the end of the air outlet 12 near the drive motor can be effectively eliminated, so that the airflow at different positions of the air outlet 12 along the axial direction of the impeller 3 is more uniform, thereby avoiding surge noise caused by uneven airflow.

[0058] According to some embodiments of this utility model, along the axial direction of the impeller 3, the side of the air guide structure 23 facing away from the drive motor is formed as a guide surface 231. The guide surface 231 is set at an angle to the axial direction of the impeller 3, and the guide surface 231 extends downward at an angle away from the drive motor. Therefore, through the inclined guide surface 231, the airflow near the drive motor end inside the volute 2 can be guided more stably towards the center position of the air outlet 12, so as to ensure the uniformity of the airflow. In addition, the air guide structure 23 can effectively prevent the backflow phenomenon at the end of the air outlet 12 near the drive motor, thereby avoiding the surge noise caused by backflow, and improving the quietness of the air conditioner 100 operation.

[0059] According to some embodiments of this utility model, the air guiding structure 23 is plate-shaped. This reduces the space occupied by the air guiding structure 23 and the material input, thereby lowering production costs.

[0060] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0061] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner, characterized in that, include: The housing assembly has an air inlet and an air outlet; A fan assembly is disposed within the housing assembly and includes a volute, a fan wheel, and a drive motor. At least a portion of the fan wheel is disposed within the volute. The drive motor is used to drive the fan wheel to rotate. The volute has a front volute tongue, and the end face of the front volute tongue near the air inlet is a first end face, on which a notch is formed. A functional module is disposed within the housing assembly and located upstream of the volute. The functional module and the front volute tongue are arranged along a first direction, which is perpendicular to the axial direction of the impeller. The projection of the functional module onto the reference surface is a first projection, and the projection of the notch onto the reference surface is a second projection. At least a portion of the first projection and the second projection overlap. The reference surface is perpendicular to the first direction.

2. The air conditioner according to claim 1, characterized in that, The axis of the wind turbine extends in the left-right direction, the air inlet is located at the top of the housing assembly, the air outlet is located at the lower front part of the housing assembly, and the functional module is located at the front end of the air inlet.

3. The air conditioner according to claim 1, characterized in that, The depth of the notch recessed into the first end face ranges from 1mm to 2mm.

4. The air conditioner according to claim 1, characterized in that, A first baffle rib extending along the axial direction of the wind turbine is formed on the first end face, and the first baffle rib and the notch are arranged along the axial direction of the wind turbine.

5. The air conditioner according to claim 4, characterized in that, The depth of the notch recessed into the first end face is less than the height of the first baffle protruding from the first end face; and / or, the height of the first baffle protruding from the first end face is in the range of 3mm to 5mm.

6. The air conditioner according to claim 4, characterized in that, Along the axial direction of the wind turbine, at least some of the first baffles have different lengths.

7. The air conditioner according to claim 1, characterized in that, The volute has a rear volute tongue, and the end face of the rear volute tongue near the air inlet is a second end face. The second end face is provided with a second baffle extending along the axial direction of the impeller.

8. The air conditioner according to claim 1, characterized in that, The volute has a rear volute tongue, and the rear volute tongue has a protrusion on its inner wall surface facing the impeller.

9. The air conditioner according to claim 8, characterized in that, The protrusion is located at one end of the rear volute tongue near the air inlet and at the other end of the rear volute tongue near the drive motor.

10. The air conditioner according to claim 1, characterized in that, The volute has a rear volute tongue, and an air guide structure is provided on the inner wall surface of the rear volute tongue. The air guide structure is located at one end of the rear volute tongue near the air outlet and at the other end of the rear volute tongue near the drive motor. The air guide structure is used to guide the airflow away from the drive motor.

11. The air conditioner according to claim 10, characterized in that, Along the axial direction of the wind turbine, the side of the air guiding structure away from the drive motor is formed as a guide surface. The guide surface is set at an angle to the axial direction of the wind turbine, and the guide surface extends downward at an angle in the direction away from the drive motor.

12. The air conditioner according to claim 10, characterized in that, The air guiding structure is plate-shaped.

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