Indoor unit of air conditioner

Abstract

The utility model provides an indoor unit of an air conditioner. Comprising a shell, an air supply duct is arranged in the shell, and an air outlet of the air supply duct is formed in the shell; the swinging blade assembly comprises a core shaft extending in the length direction of the air outlet and swinging blades arranged on the core shaft, the swinging blades penetrate through the core shaft, and the swinging blades are configured to be rotating shafts around the axis of the core shaft; the swing blades are arranged in the air supply duct; the cross-flow wind wheel is arranged in the shell, and the cross-flow wind wheel is arranged in the air supply duct; the cross-flow wind wheel is located on the air inlet side of the swing blades. The distance between the edge of the swing blade and the cross-flow wind wheel is larger than or equal to 15 mm. Air flow can be guided under the condition of diversification of air flow outflow, the situation that oscillation air cannot be experienced due to up-down air leakage of the air supply duct is prevented, the heating / cooling effect is improved, air conditioner energy consumption is reduced, and the energy efficiency is improved.

Description

Technical Field

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

[0002] In most conventional wall-mounted air conditioner models, a deflector is installed at the air outlet. This deflector can be used to open or close the air outlet and can also adjust the angle of the airflow by flipping it up or down. However, due to the limitation of the deflector's vertical flipping mechanism, it can only adjust the vertical direction of the airflow and cannot adjust the horizontal angle of the airflow. Therefore, some wall-mounted air conditioner models also have a louvered air guide device in their air outlet duct to adjust the horizontal angle of the airflow. This allows the airflow to be guided both vertically and horizontally. However, this single air guiding method is not conducive to improving the diversity of air supply and enhancing the user experience.

[0003] Based on this, the inventor provides a novel swing device, such as Figure 1 As shown, the swing device includes a rotating shaft 11 and multiple inclined blades 12 disposed on the rotating shaft 11. The blades 12 are flat and inclined relative to the rotating shaft, and the multiple blades 12 rotate synchronously with the rotating shaft 11, which can diversify the airflow pattern. However, improper positioning of the swing blade assembly can obstruct airflow and reduce the air volume; it can also fail to effectively guide airflow, resulting in a decrease in the overall cooling or heating efficiency of the air conditioner. Utility Model Content

[0004] In view of the above problems, this utility model is proposed to provide an air conditioner indoor unit that overcomes or at least partially solves the above problems, which is beneficial to guide airflow while diversifying airflow outflow, thereby improving heating / cooling effect, reducing air conditioning energy consumption, and improving energy efficiency.

[0005] Specifically, this utility model provides an indoor unit for an air conditioner, which includes:

[0006] A housing, wherein an air supply duct is provided inside the housing, and an air outlet of the air supply duct is provided on the housing;

[0007] A louver assembly includes a spindle extending along the length of the air outlet and a louver disposed on the spindle, the louver passing through the spindle and configured to rotate about the axis of the spindle; the louver is disposed within the air supply duct.

[0008] A cross-flow impeller is disposed within the housing and within the air supply duct; the cross-flow impeller is located on the air inlet side of the swing blades;

[0009] The distance between the edge of the blade and the cross-flow impeller is greater than or equal to 15mm.

[0010] Optionally, the distance between the upper and lower walls at the narrowest point of the air supply duct is the first distance;

[0011] The distance between the edge of the blade and the upper wall of the air supply duct is greater than or equal to 2 mm and less than or equal to half of the first distance;

[0012] The distance between the edge of the blade and the lower wall of the air supply duct is greater than or equal to 2 mm and less than half of the first distance.

[0013] Optionally, the distance between the edge of the oscillating blade and the upper wall of the air supply duct is greater than or equal to 4 mm and less than or equal to 10 mm; the distance between the edge of the oscillating blade and the lower wall of the air supply duct is greater than or equal to 4 mm and less than or equal to 10 mm.

[0014] Optionally, the maximum distance between the edge of the oscillating blade and the axis of the spindle is the second distance;

[0015] The distance between the axis of the spindle and the plane where the air outlet is located is the third distance;

[0016] The second distance is less than the third distance;

[0017] The ratio between the second distance and the third distance is 1 / 4 to 1 / 2.

[0018] Optionally, a portion of the oscillating blade is located inside the narrowest point of the air supply duct.

[0019] Optionally, the upper wall of the air supply duct includes a first plane connected to the upper edge of the air outlet, the front end of the first plane is lower than the rear end of the first plane, and the angle between the first plane and the horizontal plane is 5° to 30°.

[0020] The lower wall of the air supply duct includes a second plane connected to the lower edge of the air outlet. The front end of the second plane is lower than the rear end of the second plane. The angle between the second plane and the horizontal plane is 10° to 45°. The angle between the first plane and the horizontal plane is smaller than the angle between the second plane and the horizontal plane.

[0021] Optionally, the projection of the oscillating blade onto a reference plane perpendicular to the spindle is circular or square.

[0022] Optionally, the indoor unit of the air conditioner further includes a drive device;

[0023] The oscillating blade assembly also includes multiple rotating cylinders;

[0024] The rotating drum is mounted on the spindle, and multiple rotating drums are connected sequentially along the axial direction of the spindle; some or all of the rotating drums are provided with the swing blades;

[0025] For each of two adjacent and connected rotating drums, one rotating drum is configured to rotate relative to the other rotating drum first and then drive the other rotating drum to rotate, or to drive the other rotating drum to rotate and then rotate relative to the other rotating drum.

[0026] The drive device is disposed within the housing and configured to drive one of the rotating drums to rotate forward and / or in the reverse direction around the spindle.

[0027] Optionally, in each of two adjacent and connected rotating drums:

[0028] One end of the rotating drum is provided with a plurality of grooves, and the plurality of grooves are arranged sequentially along the circumferential direction of the rotating drum;

[0029] One end of the other rotating cylinder is provided with a plurality of first protrusions, each first protrusion being inserted into a groove, and each first protrusion having a rotational gap with the corresponding groove in the circumferential direction of the rotating cylinder, so that the two rotating cylinders can rotate relative to each other.

[0030] Optionally, the central angle corresponding to each of the rotational gaps is between 1 / 13 degree and 1 / 4 degree;

[0031] The ratio between the length of the first protrusion extending along the axial direction of the mandrel and the circumference of the outer peripheral wall of the rotating cylinder is 1 / 8 to 1 / 3.

[0032] The ratio between the length of the first protrusion extending along the axial direction of the mandrel and the length of the groove extending along the axial direction of the mandrel is 9 / 10 to 11 / 10.

[0033] In the indoor unit of this air conditioner, the optimized position of the sway blade assembly allows for diversified airflow while enabling the rotating sway blade assembly to rotate effectively. This guides airflow, ensuring natural air delivery and preventing air leakage from the duct, thereby increasing air volume and enhancing the air conditioner's cooling / heating capacity. The sway blade assembly is located inside the air conditioner casing, avoiding contact with the air guide plate and preventing noise issues caused by potential collisions or friction. The optimized layout also prevents noise or component damage from collisions or friction with the cross-flow fan and ductwork. Sufficient space allows the sway blade assembly to rotate 360° along its axis, providing comprehensive control over airflow direction and distribution, achieving uniform air distribution within the room and enhancing user comfort.

[0034] In other words, the optimal position of the louver assembly allows for rotation without limiting the rotation angle, enabling 360° rotation along the axis. This overcomes the limitations of traditional louvered units that only swing left and right, resulting in more diverse and natural airflow, a more uniform indoor airflow distribution, and improved occupant comfort. The louver assembly's placement also reduces air leakage and wind loss in the ductwork, increases airflow, and enhances heating / cooling capacity. It also stabilizes airflow, optimizes air delivery, and reduces noise caused by airflow disturbances, further increasing user comfort. Additionally, it allows the indoor unit to reach the set temperature more quickly, reducing energy consumption and resulting in significant energy savings.

[0035] Specifically, in the indoor unit of the air conditioner of this invention, the position design of the louver assembly is crucial for airflow and temperature distribution. The louver assembly and the cross-flow fan are not too close, so as not to interfere with the normal operation of the cross-flow fan, ensuring stable airflow, guaranteeing the air delivery effect of the air conditioner, and preventing friction and airflow disturbance between the two from increasing noise; it also prevents excessive proximity from causing additional stress to the internal structure of the air conditioner, especially preventing structural damage during high-speed operation.

[0036] The louver assembly is not placed too close to the duct wall / air outlet, so it does not obstruct airflow and ensures sufficient air volume. It also effectively guides airflow, preventing a decrease in the overall cooling or heating efficiency of the air conditioner. The louver assembly is also not too far from the duct wall / air outlet, preventing airflow dispersion that would reduce the air conditioner's air delivery range, ensuring airflow coverage, and preventing a decrease in airflow speed from affecting the air conditioner's air delivery efficiency and temperature distribution.

[0037] The above and other objects, advantages and features of this utility model will become more apparent to those skilled in the art from the following detailed description of specific embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0038] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0039] Figure 1 This is a schematic structural diagram of the louver assembly in an air conditioner in the prior art;

[0040] Figure 2 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present utility model;

[0041] Figure 3 This is a schematic cross-sectional view of an indoor unit of an air conditioner according to an embodiment of the present invention;

[0042] Figure 4 yes Figure 3 A schematic enlarged view of point A in the middle;

[0043] Figure 5 This is a schematic structural diagram of the swing blade assembly in the indoor unit of an air conditioner according to an embodiment of the present utility model;

[0044] Figure 6 yes Figure 5 A schematic structural diagram of the oscillating blade section in the oscillating blade assembly shown;

[0045] Figure 7 yes Figure 5 A schematic structural diagram of the oscillating blade section from another perspective;

[0046] Figure 8 This is a schematic diagram of the rotation gap in a louver assembly according to an embodiment of the present invention;

[0047] Figure 9 This is a schematic diagram of the connection between two adjacent rotating cylinders in a blade assembly according to an embodiment of the present invention.

[0048] In the attached image:

[0049] 20. Oscillating blade section; 21. Rotating cylinder; 22. Oscillating blade; 23. First protrusion; 24. Second protrusion; 25. Groove; 26. Rotation gap; 30. Spindle; 40. Housing; 41. Air outlet; 42. Rotating bracket; 43. First plane; 44. Second plane; 50. Cross-flow impeller. Detailed Implementation

[0050] The following reference Figures 1 to 9 This description pertains to the indoor unit of an air conditioner according to an embodiment of the present invention. In this description, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature, that is, include one or more of that feature. In the description of the present invention, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it encompasses, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0051] Unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," and "couple" 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 mechanical connection or an electrical connection; 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, unless otherwise expressly limited. Those skilled in the art should be able to understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, in the description of this embodiment, "above" or "below" the second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. That is, in the description of this embodiment, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "below" of the second feature can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. 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.

[0054] Figure 2 This is a schematic structural diagram of an indoor unit of an air conditioner according to an embodiment of the present invention, as shown below. Figure 2 As shown, and with reference Figures 3 to 9 This utility model provides an indoor unit for an air conditioner. The indoor unit includes a housing 40, a louver assembly, and a cross-flow fan 50.

[0055] An air supply duct is provided inside the housing 40, and an air outlet 41 of the air supply duct is provided on the housing 40. The air supply duct delivers cold or hot air to the room through the air outlet 41 to achieve indoor heating or cooling. The oscillating blade assembly includes a spindle 30 extending along the length direction of the air outlet 41, and oscillating blades 22 disposed on the spindle 30. The oscillating blades 22 pass through the spindle 30 and are configured to rotate around the axis of the spindle 30; the oscillating blades 22 are disposed within the air supply duct. When the oscillating blades 22 rotate, they guide the airflow. The arrangement and rotation of the oscillating blades 22 abandon the existing method of only swinging left and right to deliver air, providing a completely different air supply method. That is, it makes up for the traditional oscillation form of oscillating blades, which is conducive to diversified air supply methods and a richer user experience.

[0056] A cross-flow fan 50 is housed within the casing 40 and within the air supply duct. The cross-flow fan 50 is located on the air inlet side of the swing blades 22. The rotation of the cross-flow fan 50, in conjunction with the air supply duct, directs the airflow towards the air outlet 41. Figure 3 and Figure 4 As shown, the distance L1 between the edge of the oscillating blade 22 and the cross-flow impeller 50 is greater than or equal to 15mm. That is to say, the minimum distance L1 between the edge of the oscillating blade 22 and the cross-flow impeller 50 is greater than or equal to 15mm.

[0057] In the indoor unit of this air conditioner, the position design of the louver assembly is crucial for airflow and temperature distribution. The louver assembly is not too close to the cross-flow fan 50, thus avoiding interference with its normal operation, ensuring stable airflow, guaranteeing the air conditioning's delivery effect, and preventing friction and airflow disturbance between the two from increasing noise. It also prevents excessive proximity from causing additional stress to the internal structure of the air conditioner, especially preventing structural damage during high-speed operation.

[0058] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, part of the oscillating blade 22 is located on the inner side of the narrowest part of the air supply duct. In other words, the oscillating blade 22 can be set close to the cross-flow impeller 50, making full use of the large space between the volute tongue and the volute casing of the cross-flow impeller 50, which is not only conducive to the rotation of the oscillating blade 22, but also facilitates the oscillating blade 22 to guide the airflow.

[0059] In some embodiments of this utility model, such as Figure 3 and Figure 4As shown, the maximum distance L2 between the edge of the oscillating blade 22 and the axis of the spindle 30 is the second distance. The distance L3 between the axis of the spindle 30 and the plane where the air outlet 41 is located is the third distance. The second distance is less than the third distance; the ratio between the second distance and the third distance is 1 / 4 to 1 / 2. This arrangement ensures that the distance between the oscillating blade 22 and the air outlet 41 is appropriate, which is conducive to airflow. The oscillating blade assembly is located inside the air conditioning housing 40 and does not contact the air guide plate, thus avoiding noise problems caused by possible collisions or friction with the air guide plate.

[0060] In some embodiments of this invention, the projection of the oscillating blade 22 onto a reference plane perpendicular to the spindle 30 is circular or square. The spindle 30 rotates through the center of the oscillating blade 22. Further, the oscillating blade 22 is circular, and the maximum distance between the edge of the oscillating blade 22 and the axis of the spindle 30 is the radius of the projection of the oscillating blade 22 onto the reference plane perpendicular to the spindle 30. Optionally, the oscillating blade 22 is square, and the maximum distance between the edge of the oscillating blade 22 and the axis of the spindle 30 is half the length of the diagonal of the projection of the oscillating blade 22 onto the reference plane perpendicular to the spindle 30. Further, the included angle between the oscillating blade 22 and the spindle 30 is 30° to 50°.

[0061] In some embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the distance L4 between the upper and lower walls at the narrowest point of the air supply duct is the first distance. The distance L5 between the edge of the oscillating blade 22 and the upper wall of the air supply duct is greater than or equal to 2mm and less than or equal to half of the first distance. The distance L6 between the edge of the oscillating blade 22 and the lower wall of the air supply duct is greater than or equal to 2mm and less than half of the first distance. The oscillating blade assembly is not too far from the duct wall to prevent airflow dispersion that would reduce the air supply range of the air conditioner, ensuring airflow coverage area. It also prevents air leakage at the top and bottom of the air supply duct, ensuring the oscillating air is not experienced, and prevents the airflow velocity from decreasing, which would affect the air supply efficiency and temperature distribution of the air conditioner.

[0062] In some preferred embodiments of this utility model, the distance between the edge of the oscillating blade 22 and the upper wall of the air supply duct is greater than or equal to 4 mm and less than or equal to 10 mm; the distance between the edge of the oscillating blade 22 and the lower wall of the air supply duct is greater than or equal to 4 mm and less than or equal to 10 mm.

[0063] In some embodiments of this utility model, such as Figure 5As shown, the oscillating blade assembly also includes multiple rotating cylinders 21. The rotating cylinders 21 are mounted on the spindle 30, and the multiple rotating cylinders 21 are connected sequentially along the axial direction of the spindle 30. Some or all of the rotating cylinders 21 are provided with oscillating blades 22, and the structure consisting of the rotating cylinders 21 and the oscillating blades 22 can also be referred to as the oscillating blade section 20. The oscillating blades 22 are inclined relative to the rotating cylinders 21. The multiple rotating cylinders 21 are connected sequentially along the axial direction of the spindle 30. In each pair of adjacent and connected rotating cylinders 21, one rotating cylinder 21 is configured such that, during rotation, it can first rotate relative to the other rotating cylinder and then drive the other rotating cylinder to rotate, or it can drive the other rotating cylinder to rotate and then rotate relative to the other rotating cylinder.

[0064] In other words, when the oscillating blade assembly of this embodiment is working, it drives one of the rotating cylinders 21 to rotate around a first direction. This rotating cylinder 21 drives another rotating cylinder 21 to rotate synchronously, and the other rotating cylinder 21 drives the next rotating cylinder 21 to rotate synchronously. Multiple oscillating blades 22 can rotate synchronously, providing a novel air delivery method. Furthermore, when driving the rotating cylinder 21 to rotate around a second direction opposite to the first direction, the rotating cylinder 21 will first rotate on its own, and then drive another rotating cylinder 21 to rotate synchronously. The other rotating cylinder 21 will first rotate on its own, and then drive the next rotating cylinder 21 to rotate synchronously. The oscillating blades 22 do not rotate synchronously, also providing a novel air delivery method. This air delivery can also be called oscillating air delivery or natural air delivery, which can make the airflow intermittent, achieving a feeling of intermittent air delivery. In this embodiment, this process only provides one rotation method. Whether two adjacent rotating cylinders 21 rotate synchronously or relative to each other first can be controlled according to the actual working conditions. That is, by controlling the rotation direction and rotation time of the first rotating cylinder 21, multiple air delivery modes can be achieved.

[0065] In some preferred embodiments of this utility model, such as Figures 5 to 9 As shown, in order to enable adjacent blades 22 to rotate synchronously or relative to each other, in each pair of adjacent and connected rotating cylinders 21: one end of one rotating cylinder 21 is provided with multiple grooves 25, which are arranged sequentially along the circumferential direction of the rotating cylinder 21. The corresponding end of the other rotating cylinder 21 is provided with multiple first protrusions 23, each first protrusion 23 being inserted into a groove 25, and each first protrusion 23 and its corresponding groove 25 having a rotational gap 26 in the circumferential direction of the rotating cylinder 21, so that the two rotating cylinders 21 can rotate relative to each other. Specifically, the maximum rotation angle that the two rotating cylinders can rotate relative to each other is the central angle corresponding to the rotational gap 26.

[0066] For example, when the rotating drum 21 rotates in a second direction opposite to the first direction, due to the existence of the rotation gap 26, the rotating drum 21 will first rotate by itself to the maximum rotation angle, and then drive another rotating drum 21 to rotate synchronously. The other rotating drum 21 will first rotate by itself to the maximum rotation angle, and then drive the next rotating drum 21 to rotate synchronously. The oscillating blades 22 do not rotate synchronously. In this embodiment of the present invention, two adjacent oscillating blades 22 generate a certain angle of relative rotation through the protrusions and grooves 25 on the rotating drum 21, so that the two oscillating blades 22 can move synchronously during the rotation of the oscillating blade assembly, and can also generate a certain relative rotation.

[0067] Furthermore, in this embodiment of the invention, the rotating cylinder 21 is mounted on the spindle 30. The spindle 30 can improve the strength of the oscillating blade assembly and prevent skewing when the two rotating cylinders 21 are directly connected. Especially when there is a gap between the protrusions and grooves 25 on the two rotating cylinders 21, it ensures the coaxiality of the two rotating cylinders 21, which is beneficial to the relative rotation and power transmission between the two rotating cylinders 21. Moreover, the rotation of the multiple oscillating blades 22 does not change their own positions; that is, when the rotating cylinder 21 rotates, it does not undergo any lateral or vertical displacement. Therefore, compared with the connecting rods that make lateral movement in conventional oscillating blade 22 air guiding devices, the present invention does not require space to be reserved for lateral movement, thus reducing the space occupation of the oscillating blade 22 mechanism and improving the utilization rate of the indoor unit's internal space.

[0068] In some embodiments of this utility model, such as Figure 8 and Figure 9 As shown, the central angle α corresponding to the rotation gap 26 is between 1 / 360 degrees and 1 / 3 degree. Preferably, the central angle α corresponding to the rotation gap 26 is between 1 / 13 degrees and 1 / 4 degree. The setting of the rotation gap 26 can achieve excellent oscillating air supply effect, and can ensure the fitting strength between the first protrusion 23 and the groove 25, ensure the structural strength of the rotating cylinder 21, improve the service life of the rotating cylinder 21, and prevent power transmission failure due to damage.

[0069] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, in each pair of adjacent and connected rotating cylinders 21, one end of one rotating cylinder 21 is provided with a plurality of second protrusions 24, which define a plurality of grooves 25. The arrangement and corresponding dimensions of the first protrusions 23 and the second protrusions 24 make the structure of the rotating cylinder 21 simple, easy to manufacture and process, and have sufficient strength, while also making the manufacturing cost low and improving its practicality.

[0070] In some embodiments of this utility model, such as Figure 6 and Figure 7As shown, on the rotating cylinder 21 that simultaneously has a first protrusion 23 and a second protrusion 24, the overall structure formed by multiple first protrusions 23 and the overall structure formed by multiple second protrusions 24 are identical. The arrangement of the first protrusions 23 and the second protrusions 24 facilitates the reversible installation of each rotating cylinder 21. In other words, the structures at both ends of the rotating cylinder 21 with the first protrusions 23 and the second protrusions 24 are identical, so that when the rotating cylinder 21 is connected to another rotating cylinder 21, the end of the rotating cylinder 21 with the first protrusion 23 can be connected to the other rotating cylinder 21, or the end of the rotating cylinder 21 with the second protrusion 24 can be connected to the other rotating cylinder 21. This allows for corresponding installation according to specific needs during assembly.

[0071] In some embodiments of this utility model, such as Figures 5 to 8 As shown, the outer peripheral wall of the first protrusion 23 and the corresponding outer peripheral wall of the rotating cylinder 21 are on the same arc surface, as are the outer peripheral walls of the second protrusion 24 and the corresponding rotating cylinder 21. The inner peripheral wall of the first protrusion 23 and the corresponding inner peripheral wall of the rotating cylinder 21 are on the same arc surface, as are the inner peripheral walls of the second protrusion 24 and the corresponding inner peripheral wall of the rotating cylinder 21. On the same rotating cylinder 21, the central angle corresponding to the outer peripheral wall of the first protrusion 23 is either unequal to or equal to the central angle corresponding to the outer peripheral wall of the other first protrusion 23. In this embodiment, the thickness of the first protrusion 23 is comparable to the thickness of the rotating cylinder 21, and the thickness of the second protrusion 24 is comparable to the thickness of the rotating cylinder 21. This ensures that the rotating cylinder 21, the first protrusion 23, and the second protrusion 24 have sufficient strength, facilitates the rotation of the rotating cylinder 21 on the spindle 30, and reduces the number of pits on the outer peripheral walls of the multiple rotating cylinders 21, improving aesthetics and preventing airflow obstruction due to entering the pits.

[0072] In some embodiments of this utility model, such as Figures 5 to 7 As shown, the ratio between the length of the first protrusion 23 extending axially along the spindle 30 and the circumference of the outer peripheral wall of the rotating cylinder 21 is 1 / 20 to 1 / 2. The ratio between the length of the first protrusion 23 extending axially along the spindle 30 and the length of the groove 25 extending axially along the spindle 30 is 9 / 10 to 11 / 10. Preferably, the ratio between the length of the first protrusion 23 extending axially along the spindle 30 and the circumference of the outer peripheral wall of the rotating cylinder 21 is 1 / 8 to 1 / 3. The first protrusion 23 and the second protrusion 24 have sufficient length to improve the effectiveness of transmission and prevent structural damage and power transmission failure.

[0073] In some embodiments of this utility model, the sum of the central angle β corresponding to the first protrusion 23, the central angle γ corresponding to the second protrusion 24, and the central angle α corresponding to the rotation gap 26 is 360 degrees, such as... Figure 9As shown, the sum of the central angle β corresponding to the two first protrusions 23, the central angle γ corresponding to the two second protrusions 24, and the central angle α corresponding to the two rotation gaps 26 is 360 degrees, i.e., β*2+γ*2+α*2=360 degrees. This ensures that there are no other redundant structures at the end of the corresponding rotating drum 21, making the structure more compact, stronger, with better power transmission, and lower cost.

[0074] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the multiple blades 22 of the oscillating blade assembly are all of the same shape and structure. Of course, the blades 22 can also have different shapes and structures, and the tilting directions of two adjacent blades 22 can be the same or opposite. The rotating cylinder 21 with blades 22, the blades 22, the first protrusion 23 and the second protrusion 24 can be integrally injection molded. The rotating cylinder 21 without blades 22, the first protrusion 23 and the second protrusion 24 can also be integrally injection molded.

[0075] When the rotating drum 21 is not equipped with the swing blades 22, the variety of air supply can be increased, and the swing blade assembly can be easily installed on other structures of the air conditioner through the rotating drum 21, such as the rotating bracket 42 on the air conditioner. It can also prevent the swing blades 22 and the rotating bracket 42 from interfering with each other.

[0076] In some embodiments of this utility model, the indoor unit of the air conditioner further includes a drive device. The drive device is disposed within the housing 40 and configured to drive a rotating drum 21 to rotate forward and / or backward around a spindle 30. Further, the drive device is a motor or other component installed inside the air conditioner, and the motor shaft can drive the rotating drum 21 to rotate synchronously via gears or other transmission components. Optionally, the motor is a bidirectional motor type, thereby driving the corresponding rotating drum 21 to rotate clockwise or counterclockwise, i.e., to rotate forward or backward.

[0077] In some embodiments of this utility model, the air outlet 41 of the indoor unit of the air conditioner can extend horizontally. Further, the indoor unit of the air conditioner is preferably a wall-mounted unit, window unit, ducted unit, or ceiling unit.

[0078] In some other embodiments of this utility model, the indoor unit can be a vertical air conditioner indoor unit, the air outlet 41 can be vertically arranged, the core shaft 30 can also be vertically arranged, and the swivel assembly is vertically arranged at the air outlet 41.

[0079] In some embodiments of this utility model, such as Figure 3 and Figure 4As shown, the upper wall of the air supply duct includes a first plane 43 connected to the upper edge of the air outlet 41 and a volute tongue connected to the first plane. The front end of the first plane 43 is lower than the rear end of the first plane 43, and the angle between the first plane 43 and the horizontal plane is 5° to 30°. The distance between the edge of the oscillating blade and the upper wall of the air supply duct is the same as the distance between the edge of the oscillating blade and the volute tongue.

[0080] The lower wall of the air supply duct includes a second plane 44 connected to the lower edge of the air outlet 41. The front end of the second plane 44 is lower than its rear end, and the angle between the second plane 44 and the horizontal plane is 10° to 45°. The angle between the first plane 43 and the horizontal plane is smaller than the angle between the second plane 44 and the horizontal plane. By setting the shape and position of the air outlet section of the air supply duct, combined with the setting position of the louver assembly, it is more conducive to the louver assembly guiding the air, that is, it is more conducive to guiding the airflow while making the airflow more diversified. It helps to prevent air leakage from the top and bottom of the air supply duct and the inability to experience oscillating airflow, which helps to improve the heating / cooling effect, reduce air conditioning energy consumption, and improve energy efficiency.

[0081] Therefore, those skilled in the art should recognize that although many exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all such other variations or modifications.

Claims

1. An air conditioner indoor unit, characterized by comprising: Comprising: a housing, a blowing air duct being arranged in the housing, an air outlet of the blowing air duct being arranged on the housing; a swing leaf assembly, the swing leaf assembly comprising a core shaft extending along a length direction of the air outlet, and a swing leaf arranged on the core shaft, the swing leaf penetrating the core shaft, and the swing leaf being configured to rotate around an axis of the core shaft; the swing leaf being arranged in the blowing air duct; a cross-flow fan wheel, the cross-flow fan wheel being arranged in the blowing air duct; the cross-flow fan wheel being located at an air inlet side of the swing leaf; a distance between an edge of the swing leaf and the cross-flow fan wheel being greater than or equal to 15 mm.

2. The air conditioner indoor unit according to claim 1, wherein: a distance between an upper wall surface and a lower wall surface of the blowing air duct at a narrowest position of the blowing air duct is a first distance; a distance between the edge of the swing leaf and the upper wall surface of the blowing air duct is greater than or equal to 2 mm and less than or equal to half of the first distance; a distance between the edge of the swing leaf and the lower wall surface of the blowing air duct is greater than or equal to 2 mm and less than half of the first distance.

3. The air conditioner indoor unit according to claim 2, wherein: a distance between the edge of the swing leaf and the upper wall surface of the blowing air duct is greater than or equal to 4 mm and less than or equal to 10 mm; and a distance between the edge of the swing leaf and the lower wall surface of the blowing air duct is greater than or equal to 4 mm and less than or equal to 10 mm.

4. The air conditioner indoor unit according to claim 1, wherein: a maximum distance between the edge of the swing leaf and the axis of the core shaft is a second distance; a distance between the axis of the core shaft and a plane on which the air outlet is located is a third distance; the second distance is less than the third distance; a ratio between the second distance and the third distance is 1 / 4 to 1 / 2.

5. The air conditioner indoor unit according to claim 1, wherein: a part of the swing leaf is located inside the blowing air duct at the narrowest position of the blowing air duct.

6. The air conditioner indoor unit according to claim 1, wherein: the upper wall surface of the blowing air duct comprises a first plane connected to an upper edge of the air outlet and a volute tongue connected to the first plane, a front end of the first plane being lower than a rear end of the first plane, and an angle between the first plane and a horizontal plane being 5° to 30°; a distance between the edge of the swing leaf and the upper wall surface of the blowing air duct is a distance between the edge of the swing leaf and the volute tongue; the lower wall surface of the blowing air duct comprises a second plane connected to a lower edge of the air outlet, a front end of the second plane being lower than a rear end of the second plane, and an angle between the second plane and a horizontal plane being 10° to 45°; and the angle between the first plane and the horizontal plane is less than the angle between the second plane and the horizontal plane.

7. The air conditioner indoor unit according to claim 1, wherein: a projection of the swing leaf on a reference plane perpendicular to the core shaft is circular or square, and the core shaft penetrates a center of the swing leaf.

8. The air conditioner indoor unit according to claim 1, characterized by Further comprising a driving device; the swing leaf assembly further comprises a plurality of rotating cylinders. The rotating drum is sleeved on the mandrel, and a plurality of the rotating drums are sequentially connected along the axial direction of the mandrel; part or all of the rotating drums are provided with the swing leaf; Each adjacent and connected two rotating drums are configured to rotate relative to each other, one of the rotating drums rotates first and then drives the other rotating drum to rotate, or the other rotating drum is driven to rotate first and then rotates relative to the other rotating drum; The driving device is arranged in the shell and is configured to drive one of the rotating drums to rotate in a forward direction and / or a reverse direction around the mandrel.

9. The indoor unit of the air conditioner according to claim 8, wherein Each adjacent and connected two rotating drums are configured to rotate relative to each other, one of the rotating drums rotates first and then drives the other rotating drum to rotate, or the other rotating drum is driven to rotate first and then rotates relative to the other rotating drum; One end of one of the rotating drums is provided with a plurality of grooves, and the plurality of grooves are sequentially arranged along the circumferential direction of the rotating drum; The corresponding end of the other rotating drum is provided with a plurality of first protrusions, each of the first protrusions is inserted into one of the grooves, and each of the first protrusions and the corresponding groove have a rotation gap in the circumferential direction of the rotating drum, so that the two rotating drums can rotate relative to each other.

10. The indoor unit of the air conditioner according to claim 9, wherein The corresponding central angle of each rotation gap is between 1 / 13 degrees and 1 / 4 degrees; The ratio between the length of the first protrusion extending in the axial direction of the mandrel and the circumference of the outer circumferential wall of the rotating drum is 1 / 8 to 1 / 3; The ratio between the length of the first protrusion extending in the axial direction of the mandrel and the length of the groove extending in the axial direction of the mandrel is 9 / 10 to 11 / 10.

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