Air conditioner

Abstract

The utility model discloses an air conditioner which comprises an outdoor unit, and an air inlet and an air outlet are formed in a machine shell of the outdoor unit. A heat exchanger and a fan are arranged in an inner cavity of the machine shell. The heat exchanger is configured to perform heat exchange on flowing air; the fan is configured to provide air circulation power; the fan comprises a motor and a fan; the fan comprises an installation disc, at least one blade and at least one protruding part. The mounting disc is connected with a power shaft of the motor; the plurality of blades are arranged on the peripheral wall of the mounting disc at intervals; the multiple protruding parts are arranged on the suction surfaces and / or the pressure surfaces of the blades and are close to the blade tops of the blades. According to the utility model, the flowability of raw materials in the mold cavity during fan blade production can be improved, and the fan forming quality is improved.

Description

Technical Field

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

[0002] An air conditioner includes an indoor unit and an outdoor unit. The outdoor unit includes an axial fan, which provides the power for airflow. One type of axial fan incorporates reinforcing ribs on its blades to ensure strength. While these ribs have limited effect on reducing deformation and stress during operation, they cannot alter the flow of raw materials within the mold cavity during production. Poor material flowability reduces the quality of the fan blade molding.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0004] In response to the problems pointed out in the background art, this utility model proposes an air conditioner that improves the flowability of raw materials in the mold cavity during fan blade production, thereby improving the fan forming quality.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In some embodiments of this application, an air conditioner is provided, including an outdoor unit. The outdoor unit has an air inlet and an air outlet on its casing. A heat exchanger and a fan are disposed in the inner cavity of the casing. The heat exchanger is configured to exchange heat with flowing air. The fan is configured to provide air circulation power. The fan includes a motor and a fan. The fan includes a mounting plate, at least one blade, and at least one protrusion. The mounting plate is connected to the power shaft of the motor. At least one blade is disposed on the outer peripheral wall of the mounting plate. At least one protrusion is disposed on the suction surface and / or pressure surface of the blade and is close to the tip of the blade.

[0007] The above technical solution has the following advantages or beneficial effects: By setting a protrusion at the blade tip that is far from the mounting plate, from the perspective of the mold, the volume of the mold cavity corresponding to the protrusion is larger, which is called the sub-cavity. During the process of the raw material flowing from the mounting plate to the blade tip, when the raw material is close to the blade tip, the raw material flows into the sub-cavity and then diffuses from the sub-cavity to the outer periphery, thereby improving the flowability of the raw material in the blade tip area that is far from the mounting plate and improving the blade forming effect.

[0008] The sub-cavity serves as a storage space for raw materials. The sub-cavity is located corresponding to the protrusion. The raw materials flow from the mounting plate towards the blade tip within the mold cavity. Near the blade tip area, some raw materials flow into the sub-cavity and then diffuse outwards from the sub-cavity, thereby effectively diffusing the raw materials to the blade tip area and improving the molding effect at the blade tip area.

[0009] In some embodiments of this application, at least one of the protrusions is located near the leading edge of the blade, and at least one of the protrusions is located near the trailing edge of the blade.

[0010] The above technical solution has the following advantages or beneficial effects: Since the first included angle region between the leading edge and the blade tip and the second included angle region between the trailing edge and the blade tip are located at the two sharp points of the blade, and these two sharp points are farthest from the mounting plate, the raw material in the mold cavity does not easily flow to these two sharp points during the fan forming process, resulting in poor forming effect at these two sharp points. By setting protrusions at the two sharp points of the blade, it is helpful to improve the flowability of the raw material at these two sharp points, thereby improving the forming effect at these two sharp points.

[0011] In some embodiments of this application, the protrusions near the blade tip and leading edge are designated as first protrusions, and the protrusions near the blade tip and trailing edge are designated as second protrusions. At least one third protrusion is provided between the first protrusion and the second protrusion. The area S1 of the first protrusion is greater than the area S2 of the second protrusion, which is greater than the area S3 of the third protrusion.

[0012] The above technical solution has the following advantages or beneficial effects: a third protrusion is provided between the two tips of the blade. Corresponding to the mold cavity, a sub-cavity is also formed in the mold cavity at the position where the third protrusion is formed. This sub-cavity helps to improve the flowability of the raw material in the blade tip area between the two tips of the blade.

[0013] Since the two tips of the blade are relatively far from the mounting plate, the area of ​​the first protrusion S1 is set to be greater than the area of ​​the second protrusion S2 and the area of ​​the third protrusion S3. This ensures the forming effect of the blade tip area while avoiding excessively large protrusions that would increase the material cost unnecessarily.

[0014] In some embodiments of this application, the radius of the fan is R; the protrusion provided near the blade tip and leading edge is a first protrusion, the first protrusion is circular, and the radius of the first protrusion is R1, R1≥0.2R, R1≤0.3R.

[0015] The above technical solution has the following advantages or beneficial effects: the radius of the first protrusion is related to the radius of the fan, the size of the first protrusion is moderate, and R1≥0.2R is set to avoid the first protrusion being too small and to meet the material quantity requirements of the first included angle area; R1≤0.3R is set to avoid the first protrusion being too large, so as to ensure the material guiding effect while avoiding unnecessary increase in material costs.

[0016] In some embodiments of this application, the radius of the fan is R; the protrusion provided near the blade tip and trailing edge is a second protrusion, the second protrusion is circular, and the radius of the second protrusion is R2, R2≥0.1R, R2≤0.15R.

[0017] The above technical solution has the following advantages or beneficial effects: the radius of the second protrusion is related to the radius of the fan, the size of the second protrusion is moderate, and R2≥0.1R is set to avoid the second protrusion being too small, so as to meet the material quantity requirements of the second included angle area; R2≤0.15R is set to avoid the second protrusion being too large, so as to ensure the material guiding effect while avoiding unnecessary increase in material cost.

[0018] In some embodiments of this application, the radius of the fan is R; the protrusions near the blade tip and leading edge are designated as the first protrusions, and the protrusions near the blade tip and trailing edge are designated as the second protrusions. At least one third protrusion is provided between the first and second protrusions. The third protrusion is circular, and its radius is R3, where R3 ≥ 0.05R and R3 ≤ 0.1R.

[0019] The above technical solution has the following advantages or beneficial effects: the radius of the third protrusion is related to the radius of the fan, the size of the third protrusion is moderate, and R3≥0.05R is set to avoid the third protrusion being too small, so as to meet the material quantity requirements between the two tip positions of the blade; R3≤0.1R is set to avoid the third protrusion being too large, so as to ensure the material guiding effect while avoiding unnecessary increase in material cost.

[0020] In some embodiments of this application, a groove group is provided on the pressure surface of the blade. The groove group is located near the blade root and near the leading edge of the blade. The groove group includes multiple rows of groove portions, any row of groove portions extending along the leading edge of the blade, and multiple rows of groove portions arranged at intervals along the circumference of the mounting plate.

[0021] The above technical solution has the following advantages or beneficial effects: By setting a groove group near the blade root at the leading edge of the blade, the blade root thickness is reduced. Thus, during cooling after the fan is formed, the reduced blade root thickness helps to accelerate the temperature drop at the blade root, reducing the temperature difference between the outside and inside of the blade root. This avoids the problem of reducing the fan height due to a large temperature difference between the inside and outside of the blade root. The groove group consists of multiple rows of grooves, which reduces the blade root thickness by slotting while avoiding excessively large slot sizes that would reduce the blade root strength.

[0022] In some embodiments of this application, the groove depth of the groove portion increases along the direction from the trailing edge of the blade to the leading edge of the blade.

[0023] The above technical solution has the following advantages or beneficial effects: Since the thickness of the leaf root is greater closer to the leading edge of the blade, the groove depth of the groove part increases along the direction from the trailing edge of the blade to the leading edge of the blade, so as to ensure the reduction of the leaf root thickness and improve the cooling effect of the leaf root.

[0024] In some embodiments of this application, a first set of ribs is provided on the suction surface of the blade. The first set of ribs is close to the leading edge of the blade and extends along the leading edge. The first end of the first set of ribs is close to the trailing edge of the blade, and the second end of the first set of ribs is close to the mounting plate.

[0025] The above technical solution has the following advantages or beneficial effects: the first rib group is located close to the leading edge of the blade, and extends between the trailing edge of the blade and the mounting plate. The first rib group helps to improve the structural strength of the leading edge region of the blade.

[0026] In some embodiments of this application, a second set of ribs is further provided on the suction surface of the blade. The second set of ribs is close to the tip of the blade and extends along the tip of the blade. The first end of the second set of ribs is close to the first end of the first set of ribs, and the second end of the second set of ribs is close to the trailing edge of the blade.

[0027] The above technical solution has the following advantages or beneficial effects: the second rib group is located close to the blade tip and extends between the leading and trailing edges of the blade. The second rib group helps to improve the structural strength of the blade tip region. There is a distance between the first end of the second rib group and the first end of the first rib group, avoiding excessive local thickness in the angled area between the leading and outer edges of the blade, which could lead to localized deformation during production.

[0028] In some embodiments of this application, the thickness of the blade is 0; the first rib group and the second rib group are composed of a plurality of spaced ribs, the width of the ribs being w1, w1≥0.4α, w1≤0.8α.

[0029] The above technical solution has the following advantages or beneficial effects: setting w1≥0.4α ensures the width of the rib, which helps to improve the structural strength of the blade. Setting w1≤0.8α ensures the structural strength of the blade while avoiding excessively wide ribs that would increase the blade weight and raw material costs.

[0030] In some embodiments of this application, the thickness of the rib is γ, where γ≥0.1α and γ≤0.3α.

[0031] The above technical solution has the following advantages or beneficial effects: setting γ≥0.1α ensures the thickness of the ribs, which helps to improve the structural strength of the blade. Setting γ≤0.3α ensures the structural strength of the blade while avoiding excessively thick ribs that would increase the blade weight and raw material costs.

[0032] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a structural diagram of an outdoor unit of an air conditioner according to some embodiments;

[0035] Figure 2 This is yet another structural diagram of an outdoor unit of an air conditioner according to some embodiments;

[0036] Figure 3 This is an internal structure diagram of an outdoor unit of an air conditioner according to some embodiments;

[0037] Figure 4 This is a structural diagram of an existing axial flow fan;

[0038] Figure 5 This is another structural diagram of an existing axial flow fan;

[0039] Figure 6 This is a structural diagram of an axial fan according to some embodiments;

[0040] Figure 7 for Figure 6 Enlarged view of section A in the middle;

[0041] Figure 8 for Figure 6 A sectional view of part A in the middle;

[0042] Figure 9 This is another structural diagram of an axial fan according to some embodiments;

[0043] Figure 10 This is a structural diagram of a blade according to some embodiments;

[0044] Figure 11 This is a partial cross-sectional view of a blade according to some embodiments.

[0045] Figure label:

[0046] 100. Housing; 110. Top plate; 120. Front side plate; 130. Bottom plate; 101. Air inlet; 102. Air outlet; 200. Fan; 201. Motor; 202. Fan;

[0047] 210. Installation disk;

[0048] 230. Leaf blade; 231. Leading edge; 232. Tail edge; 233. Leaf base; 234. Leaf tip;

[0049] 240. Protrusion; 241. First protrusion; 242. Second protrusion; 243. Third protrusion;

[0050] 250, Groove assembly; 2511, First groove portion; 2512, Second groove portion; 2513, Third groove portion; 252, Sub-groove;

[0051] 261. First group of raised ribs; 262. Second group of raised ribs; 263. Raised rib;

[0052] 271. Suction surface; 272. Pressure surface;

[0053] 300. Heat exchanger;

[0054] 400. Compressor. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0056] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "multiple" means two or more.

[0058] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0059] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature 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," and "under" the second feature includes the first feature 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.

[0060] The following disclosure provides many different embodiments or examples for implementing various structures of this 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, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0061] Reference Figures 1 to 3 This utility model relates to an air conditioner, including an outdoor unit. In one illustrative embodiment, the outdoor unit includes a housing 100, which forms the overall appearance of the outdoor unit. The top and bottom of the housing 100 are opposite ends, and the length of the housing 100 is from the top to the bottom. The left and right sides of the housing 100 are opposite sides, and the length of the housing 100 is from the left to the right. The front and rear sides of the housing 100 are opposite sides, and the thickness of the housing 100 is from the front to the rear.

[0062] The housing 100 includes a top plate 110, which is located at the top of the housing 100 and forms the top surface of the housing 100.

[0063] The housing 100 includes a base plate 130, which is located at the bottom of the housing 100 and forms the bottom surface of the housing 100. The base plate 130 and the top plate 110 are arranged opposite each other along the height direction of the housing 100.

[0064] The housing 100 includes a front side panel 120, which is located on the front side of the housing 100 and forms the front side surface of the housing 100.

[0065] The housing 100 includes a rear side panel located at the rear of the housing 100, which forms the rear side surface of the housing 100. It should be noted that in some embodiments, the housing 100 may not include a rear side panel to increase the air intake volume of the outdoor unit of the air conditioner.

[0066] The housing 100 includes an air inlet 101, which is located on the outer periphery of the housing 100.

[0067] The housing 100 includes an air outlet 102, which is located on the front side of the housing 100.

[0068] Reference Figure 3 The outdoor unit of the air conditioner includes a compressor 400, which is located inside the casing 100 and connected to the base plate 130. The compressor 400 is used to drive the flow of refrigerant.

[0069] The outdoor unit of the air conditioner includes a heat exchanger 300, which is located inside the casing 100 and configured to exchange heat with the air passing through it. The heat exchanger 300 is placed on a base plate 130. The windward side of the heat exchanger 300 faces the air inlet of the casing 100. A portion of the leeward side of the heat exchanger 300 faces the air inlet of the fan 200. The operation of the fan 200 accelerates the heat exchange between the air and the heat exchanger 300, thereby increasing the heat exchange efficiency of the heat exchanger 300.

[0070] Reference Figure 3 The outdoor unit of the air conditioner includes a fan 200, which is configured to provide power for air circulation. The fan 200 is located inside the casing 100. The fan 200 is located on the leeward side of the heat exchanger 300, and the air outlet side of the fan 200 faces the air outlet of the casing 100. By operating the fan 200, outside air is introduced into the casing 100 through the air inlet 101, and inside air is discharged to the outside of the casing 100 through the air outlet 102.

[0071] In this embodiment, the fan 200 is an axial flow fan, and the fan 200 includes a motor 201. The output shaft of the motor 201 is arranged along the thickness direction of the housing 100, that is, the rotation axis of the fan 200 is arranged along the thickness direction of the housing 100.

[0072] The fan 200 includes a fan 202, which is connected to the output shaft of a motor 201. The motor 201 provides power to make the fan 202 rotate.

[0073] In some embodiments, refer to Figure 4 and Figure 5 , Figure 4 This is a front view of an axial flow fan in the prior art, that is, a structural diagram viewed from the air outlet side of the axial flow fan, or a structural diagram viewed from the pressure side of the axial flow fan; Figure 5 This is a rear view of an axial fan in the prior art, that is, a structural diagram viewed from the air intake side of the axial fan, or a structural diagram viewed from the suction side of the axial fan.

[0074] The fan 202 includes a mounting plate 210, which is connected to the drive shaft of the motor 201. The drive shaft of the motor 201 passes through the axis of the mounting plate 210.

[0075] The fan 202 includes multiple blades 230, which are spaced apart on the outer peripheral wall of the mounting plate 210. In this embodiment, there are three blades 230, which are spaced apart and surround the outer peripheral wall of the mounting plate 210. The connection between the blades 230 and the mounting plate 210 has a certain curvature, that is, the blades 230 rotate at a certain angle to facilitate the flow of outside air along the axis of the fan 202.

[0076] The leaf blade 230 includes the leading edge 231, the trailing edge 232, the leaf tip 234, and the leaf root 233.

[0077] Leading edge 231 and trailing edge 232 are two edges on blade 230 that extend outward from the outer peripheral wall of mounting disk 210. Leading edge 231 forms the leading edge on the forward side of blade 230 in the direction of rotation. Trailing edge 232 forms the opposite edge on blade 230 in the direction of rotation. In the direction of rotation, leading edge 231 is ahead of trailing edge 232, and trailing edge 232 is behind leading edge 231.

[0078] The leaf tip 234 is the outermost edge of the leaf blade 230, and the leaf tip 234 connects the outermost end of the leading edge 231 and the trailing edge 232.

[0079] The leaf root 233 is the edge where the blade 230 connects to the mounting plate 210.

[0080] In axial flow fans, the pressure surface of the blades is usually the front side of blade 230, that is, the side of blade 230 facing the air outlet of the outdoor unit of the air conditioner. On the pressure surface, the airflow velocity is lower and the static pressure is higher.

[0081] In axial fans, the suction surface of the blades is usually the back of the blade 230, that is, the side of the blade 230 that faces away from the air outlet of the outdoor unit of the air conditioner. On the suction surface, the airflow velocity is higher and the static pressure is lower.

[0082] During the processing and production of fan 202, the raw material flows from the mounting plate 210 to the blade tip 234 in the mold cavity. The blade tip 234 is far from the mounting plate 210. Due to the lack of a material guiding structure, the flow of the raw material in the mold cavity is poor. The forming effect of the blade tip 234 area, which is far from the mounting plate 210, is poor, which reduces the forming quality of the blade 230 and affects the overall performance of the machine, such as noise, air volume, air pressure and energy efficiency ratio.

[0083] To address this technical problem, in some embodiments, reference is made to... Figure 9 and Figure 10 , Figure 9 This is a structural diagram of the fan 202 as viewed from the suction surface 271. Figure 10 This is a partial structural diagram of blade 230. The fan 202 also includes protrusions 240. Multiple protrusions 240 are provided, and these protrusions 240 are disposed on the suction surface 271 and / or pressure surface 272 of blade 230, and are close to the blade tip 234. That is, multiple protrusions 240 are provided on the suction surface 271 and / or pressure surface 272 of blade 230, and these multiple protrusions 240 are arranged close to the blade tip 234.

[0084] In this case, a protrusion 240 is provided at the blade tip 234, which is farther away from the mounting plate 210. From the perspective of the mold, the volume of the mold cavity corresponding to the protrusion 240 is larger, which is referred to as the sub-cavity. During the process of the raw material flowing from the mounting plate 210 to the blade tip 234, the raw material flows into the sub-cavity when it approaches the blade tip 234, and then diffuses from the sub-cavity to the outer periphery, thereby improving the material flowability in the area of ​​the blade tip 234, which is farther away from the mounting plate 210, and improving the forming effect of the blade 230.

[0085] The sub-cavity serves as a storage space for raw materials. The sub-cavity is located corresponding to the protrusion 240. The raw materials flow from the mounting plate 210 toward the blade tip 234 within the mold cavity. When the material approaches the blade tip 234 area, some of it flows into the sub-cavity and then diffuses outward from the sub-cavity, thereby effectively diffusing the raw materials to the blade tip 234 area and improving the molding effect at the blade tip 234 area.

[0086] In some embodiments, the protrusion 240 is provided on the suction surface 271 of the blade 230.

[0087] Air flows from the suction surface 271 to the pressure surface 272 of the fan 202. The airflow generates vortices on the suction surface 271, increasing the operating noise of the fan 202. By placing the protrusion 240 on the suction surface 271 of the blade 230, the protrusion 240 interferes with the airflow vortex to a certain extent, breaking up the airflow vortex, thereby helping to reduce the operating noise of the fan 202.

[0088] The fan 202 of this application has protrusions 240 on the blades 230. On the one hand, during the molding process of the fan 202, a sub-cavity is formed in the mold cavity at the position corresponding to the protrusion 240. The sub-cavity has a certain volume and serves as a temporary storage for raw materials. When the raw materials flow from the mounting plate 210 to the blade tip 234, they first flow into the sub-cavity when they are close to the blade tip 234 area, and then diffuse outward from the sub-cavity, so that the raw materials can be effectively diffused to the blade tip 234 area, improving the molding quality of the blade tip 234 area. On the other hand, after the fan 202 is molded, the protrusion 240 is formed at the position of the sub-cavity in the mold cavity. During the operation of the fan 202, the protrusion 240 interferes with the airflow vortex formed on the suction surface 271 side of the blade 230, and disperses the airflow vortex, thereby helping to reduce the operating noise of the fan 202.

[0089] In other embodiments, the protrusion 240 is disposed on the pressure surface 272 of the blade 230. Disposing the protrusion 240 on the pressure surface 272 of the blade 230 can also serve to guide the flow of raw materials during the forming process of the blade 230, thereby improving the forming quality of the blade 230.

[0090] In other embodiments, both the pressure surface 272 and the suction surface 271 of the blade 230 are provided with protrusions 240, and the protrusions 240 on both sides are provided in a one-to-one correspondence. With the protrusions 240 on both sides being provided in a one-to-one correspondence, the volume of the sub-cavity corresponding to the position of the protrusion 240 in the mold cavity is larger, which can store more raw materials and helps to improve the material guiding effect.

[0091] In other embodiments, protrusions 240 are provided on both the pressure surface 272 and the suction surface 271 of the blade 230, and the two protrusions 240 on both sides are staggered. With the two protrusions 240 on both sides staggered, the sub-cavities in the mold cavity corresponding to the positions of the protrusions 240 are also staggered, and multiple sub-cavities guide the flow at the same time, which helps to improve the material guiding effect.

[0092] In some embodiments, at least one protrusion 240 is located near the leading edge 231 of the blade 230, and at least one protrusion 240 is located near the trailing edge 232 of the blade 230.

[0093] In other words, there are at least two protrusions 240, one of which is located near the blade tip 234 and also near the leading edge 231; the other protrusion is located near the blade tip 234 and also near the trailing edge 232.

[0094] Specifically, a first angle region is formed between the leading edge 231 and the blade tip 234, and a protrusion 240 is disposed within the first angle region between the leading edge 231 and the blade tip 234. A second angle region is formed between the trailing edge 232 and the blade tip 234, and another protrusion 240 is disposed within the second angle region between the trailing edge 232 and the blade tip 234.

[0095] Since the first angle region between the leading edge 231 and the blade tip 234 and the second angle region between the trailing edge 232 and the blade tip 234 are located at the two tips of the blade 230, and these two tips are farthest from the mounting plate 210, the raw material in the mold cavity is not easy to flow to these two tips during the molding process of the fan 202, resulting in poor molding effect at these two tips.

[0096] By providing protrusions 240 at these two pointed locations (i.e., the first included angle region and the second included angle region), it helps to improve the flowability of raw materials at the two pointed locations, thereby improving the molding effect at the two pointed locations.

[0097] In some embodiments, the thickness of the protrusion 240 decreases from the center of the protrusion 240 toward the edge of the protrusion 240, and the edge of the protrusion 240 is smoothly connected to the suction surface 271 of the blade 230.

[0098] In other words, the protrusion 240 has a thicker middle and thinner outer periphery, which is beneficial for the flow of raw materials. Furthermore, the edge of the protrusion 240 is smoothly connected to the blade 230, avoiding the formation of an uneven structure at the junction of the two that would interfere with the flow of raw materials and gas.

[0099] In some embodiments, the thickness of the protrusion 240 is directly proportional to the thickness of the blade 230 at which the protrusion 240 is located. In other words, the greater the thickness of the protrusion 240 at the blade 230, the greater the thickness of the protrusion 240; the smaller the thickness of the protrusion 240 at the blade 230, the smaller the thickness of the protrusion 240.

[0100] The greater the thickness of the blade 230, the more raw material is needed during the molding process. Therefore, the thickness of the protrusion 240 is also increased accordingly. This means that the volume of the sub-cavity used to form the protrusion 240 in the mold cavity is increased, which can store more raw material and ensure sufficient raw material supply and material diversion effect.

[0101] In some embodiments, a protrusion 240 near the blade tip 234 and leading edge 231 of the blade 230 is a first protrusion 241, and a protrusion 240 near the blade tip 234 and trailing edge 232 of the blade 230 is a second protrusion 242. At least one third protrusion 243 is provided between the first protrusion 241 and the second protrusion 242. For example, in Figure 9 and Figure 10 In the fan shown, two third protrusions 243 are provided on the blade 230, and the two third protrusions 243 are arranged at intervals along the extension direction of the blade tip 234.

[0102] The first protrusion 241 and the second protrusion 242 are arranged at the two tips of the blade 230 to improve the material flow at the two tips and enhance the forming effect at the two tips. Because the blade tip 234 has a certain extension distance, during the fan forming process, the material temporarily stored in the sub-cavities at the two tips cannot be effectively guided to the blade tip 234 area between the first protrusion 241 and the second protrusion 242, thus affecting the forming effect of the blade tip 234 area.

[0103] To solve this technical problem, a third protrusion 243 is provided between the two tips of the blade 230. Corresponding to the mold cavity, a sub-cavity is also formed in the mold cavity at the position where the third protrusion 243 is formed. This sub-cavity helps to improve the flowability of the raw material in the blade tip 234 region between the two tips of the blade 230.

[0104] In some embodiments, since the two tips of the blade 230 are relatively far from the mounting plate 210, the area of ​​the first protrusion 241 is set to S1 > the area of ​​the second protrusion 242 is set to S2 > the area of ​​the third protrusion 243 is set to S3. This ensures the forming effect of the blade tip 234 area while avoiding the unnecessary increase in raw material costs caused by setting the protrusion 240 too large.

[0105] In some embodiments, the radius of fan 202 is R. (Refer to...) Figure 9 and Figure 10 The protrusion 240 provided near the blade tip 234 and leading edge 231 of the blade 230 is the first protrusion 241. The first protrusion 241 is circular and the radius of the first protrusion 241 is R1, where R1≥0.2R and R1≤0.3R.

[0106] The radius of the first protrusion 241 is associated with the radius of the fan 202. The size of the first protrusion 241 is moderate. R1≥0.2R is set to avoid the first protrusion 241 being too small and to meet the material quantity requirements of the first included angle area. R1≤0.3R is set to avoid the first protrusion 241 being too large and to avoid unnecessary increase in material costs while ensuring the material guiding effect.

[0107] In some embodiments, the radius of fan 202 is R. (Refer to...) Figure 9 and Figure 10 The protrusion 240 provided near the blade tip 234 and trailing edge 232 of the blade 230 is the second protrusion 242. The second protrusion 242 is circular and its radius is R2, where R2≥0.1R and R2≤0.15R.

[0108] The radius of the second protrusion 242 is associated with the radius of the fan 202. The size of the second protrusion 242 is moderate. R2≥0.1R is set to avoid the second protrusion 242 being too small and to meet the material quantity requirements of the second included angle area. R2≤0.15R is set to avoid the second protrusion 242 being too large and to avoid unnecessary increase in material costs while ensuring the material guiding effect.

[0109] In some embodiments, the radius of fan 202 is R. (Refer to...) Figure 9 and Figure 10 The protrusion 240 near the blade tip 234 and leading edge 231 of the blade 230 is the first protrusion 241, and the protrusion 240 near the blade tip 234 and trailing edge 232 of the blade 230 is the second protrusion 242. At least one third protrusion 243 is provided between the first protrusion 241 and the second protrusion 242. The third protrusion 243 is circular and its radius is R3, where R3≥0.05R and R3≤0.1R.

[0110] The radius of the third protrusion 243 is associated with the radius of the fan 202. The size of the third protrusion 243 is moderate. R3 is set to ≥ 0.05R to avoid the third protrusion 243 being too small and to meet the material quantity requirements between the two tip positions of the blade 230. R3 is set to ≤ 0.1R to avoid the third protrusion 243 being too large, so as to ensure the material guiding effect while avoiding unnecessary increase in material costs.

[0111] In some embodiments, refer to Figure 6 and Figure 7 , Figure 6 This is a structural diagram viewed from the pressure surface 272 of the fan 202. Figure 7 for Figure 6 Enlarged view of section A.

[0112] In the prior art, the leading edge 231 of the blade 230 is relatively thick near the blade root 233. In actual production, after the fan 202 is formed, it is cooled at room temperature. Due to the thickness of the blade root 233, the temperature of the outer side of the blade 230 decreases while the temperature inside the blade root 233 remains high. This external cooling and internal heating causes the blade root 233 to gradually shrink, resulting in a decrease in the height of the fan 202 and a deterioration in its performance. At the same time, air bubbles will form at the blade root 233, affecting the overall mechanical properties of the fan blade and limiting the maximum speed of the fan 202.

[0113] To address this technical problem, this embodiment provides a groove assembly 250 on the pressure surface 272 of the blade 230. The groove assembly 250 is located near the blade root 233 and the leading edge 231 of the blade 230. The groove assembly 250 includes multiple rows of groove portions, any row of groove portions extending along the leading edge 231 of the blade 230, and the multiple rows of groove portions are arranged at circumferential intervals along the mounting disk 210. For example, in... Figure 7 In the structure shown, the groove group 250 includes three rows of groove portions, referred to as the first groove portion 2511, the second groove portion 2512 and the third groove portion 2513 respectively. The first groove portion 2511 is close to the leading edge 231 of the blade 230.

[0114] By setting a groove group 250 at the position of the leading edge 231 of the blade 230 near the blade root 233, the thickness of the blade root 233 is reduced. In this way, when the fan 202 is cooled after being formed, the reduced thickness of the blade root 233 helps to accelerate the temperature drop of the blade root 233, reduce the temperature difference between the outside and inside of the blade root 233, and thus avoid the problem of reducing the height of the fan 202 due to the large temperature difference between the inside and outside of the blade root 233.

[0115] The groove group 250 is composed of multiple rows of grooves, which reduces the thickness of the blade root 233 by slotting, while avoiding excessively large slot sizes that would reduce the strength of the blade root 233.

[0116] In some embodiments, any row of grooves is formed by a single elongated groove that extends along the leading edge 231 of the blade 230. By setting the grooves to be formed by a single elongated groove, the structure is simplified and the fan 202 is easier to manufacture.

[0117] In other embodiments, such as Figure 7 As shown, any column of grooves is composed of multiple spaced sub-grooves 252, which are spaced along the leading edge 231 of the blade 230. By providing multiple sub-grooves 252, the thickness of the blade root 233 can be reduced while maintaining the strength of the blade root 233.

[0118] In some embodiments, the groove depth d of the recess increases along the direction from the trailing edge 232 of the blade 230 to the leading edge 231 of the blade 230. Figure 8 Taking the groove group 250 shown as having three rows of grooves as an example, the first groove 2511 is close to the leading edge 231 of the blade 230, and the groove depth of the first groove 2511 is greater than the groove depth of the second groove 2512 and the groove depth of the third groove 2513.

[0119] Since the thickness of the blade root 233 is greater closer to the leading edge 231 of the blade 230, the groove depth of the groove portion increases along the direction from the trailing edge 232 of the blade 230 to the leading edge 231 of the blade 230, so as to ensure the reduction of the thickness of the blade root 233 and improve the cooling effect of the blade root 233.

[0120] In some embodiments, the groove depth d ≥ 2 mm and d ≤ 5 mm. Setting d ≥ 2 mm ensures sufficient groove depth to reduce the thickness of the blade root 233, which helps the blade root 233 cool down after molding. Setting d ≤ 5 mm avoids excessive groove depth, which would reduce the structural strength of the blade root 233.

[0121] In some embodiments, the groove width w of the recess increases along the direction from the trailing edge 232 of the blade 230 to the leading edge 231 of the blade 230. Figure 8 Taking the groove group 250 shown as having three rows of grooves as an example, the first groove 2511 is close to the leading edge 231 of the blade 230, and the groove width of the first groove 2511 is greater than the groove width of the second groove 2512 and the groove width of the third groove 2513.

[0122] Since the thickness of the blade root 233 is greater closer to the leading edge 231 of the blade 230, the width of the groove is increased along the direction from the trailing edge 232 of the blade 230 to the leading edge 231 of the blade 230, so as to ensure the reduction of the thickness of the blade root 233 and improve the cooling effect of the blade root 233.

[0123] In some embodiments, the groove width w of the recessed portion is ≥2mm and w≤6mm. Setting w≥2mm ensures that the grooved portion has sufficient width, which helps the blade root 233 to cool down after molding. Setting w≤6mm avoids the grooved portion being too wide, which would reduce the structural strength of the blade root 233.

[0124] In some embodiments, the groove portion decreases in length L2 along the leading edge 231 of the blade 230 in the direction from the trailing edge 232 to the leading edge 231 of the blade 230. Figure 8 Taking the groove group 250 shown as having three rows of grooves as an example, the first groove 2511 is close to the leading edge 231 of the blade 230, and the extension length of the first groove 2511 is less than the extension length of the second groove 2512 and the extension length of the third groove 2513.

[0125] The first groove portion 2511 is located near the leading edge 231 of the blade 230. The extension length of the first groove portion 2511 is set to be smaller to avoid the groove length being too large and reducing the structural strength at the leading edge 231.

[0126] In some embodiments, the extension length of the leading edge 231 of the blade 230 is L1, and the extension length of any row of grooves along the direction of the leading edge 231 of the blade 230 is L2, where L2≥0.15L1 and L2≤0.3L1.

[0127] Setting L2 to 0.15L1 ensures the groove has sufficient length, aiding in the cooling of the blade root 233 after molding. Setting L2 to ≤ 0.3L1 prevents the groove from becoming too long, which would reduce the structural strength of the blade root 233.

[0128] In some embodiments, the extension length of any sub-groove 252 along the leading edge 231 of the blade 230 is L3, where L3 ≤ 0.15L1. Setting L3 ≤ 0.15L1 avoids reducing the structural strength of the blade root 233 due to excessive length of a single sub-groove 252.

[0129] Because the groove group 250 is provided on the pressure surface 272 of the blade 230, the thickness at the blade root 233 is reduced, which will increase the deformation and worsen the stress of the blade 230 during rotation. In order to solve this technical problem, in some embodiments, ribs are provided on the suction surface 271 of the blade 230 to enhance the structural strength of the blade 230.

[0130] Specifically, refer to Figures 9 to 11 A first rib group 261 is provided on the suction surface 271 of the blade 230. The first rib group 261 is close to and extends along the leading edge 231 of the blade 230. The first end of the first rib group 261 is close to the trailing edge 232 of the blade 230, and the second end of the first rib group 261 is close to the mounting plate 210. A protrusion 240 is provided on the inner side of the first rib group 261.

[0131] The first rib group 261 is disposed near the leading edge 231 of the blade 230, and extends between the trailing edge 232 of the blade 230 and the mounting plate 210. The first rib group 261 helps to improve the structural strength of the leading edge 231 region of the blade 230.

[0132] In some embodiments, the first rib group 261 is composed of a plurality of sequentially arranged ribs 263, the number of ribs 263 being ≥2 and ≤4. Figure 11 In the structure shown, the first rib group 261 consists of three ribs 263.

[0133] The distance between the first rib group 261 and the blade tip 234 is δ1, where δ1≥5mm and δ1≤30mm.

[0134] The thickness of the blade 230 is α. The distance δ1 between the first rib group 261 and the blade tip 234 is directly proportional to the thickness α of the blade 230. The larger the thickness α of the blade 230, the larger δ1 is. The smaller the thickness α of the blade 230, the smaller δ1 is.

[0135] Because the groove group 250 is provided on the pressure surface 272 of the blade 230, the thickness at the blade root 233 is reduced, which will increase the deformation and worsen the stress of the blade 230 during rotation. To solve this technical problem, in some embodiments, a second rib group 262 is also provided on the suction surface 271 of the blade 230. The second rib group 262 is close to the blade tip 234 of the blade 230 and extends along the blade tip 234. The first end of the second rib group 262 is close to the first end of the first rib group 261, and the second end of the second rib group 262 is close to the trailing edge 232 of the blade 230. The protrusion 240 is provided inside the second rib group 262.

[0136] The second rib group 262 is disposed near the tip 234 of the blade 230, and extends between the leading edge 231 and the trailing edge 232 of the blade 230. The second rib group 262 helps to improve the structural strength of the tip 234 region.

[0137] The distance between the first end of the second rib group 262 and the first end of the first rib group 261 avoids a large local thickness in the angle area between the leading edge 231 and the outer edge of the blade 230, which could lead to local deformation during production.

[0138] In some embodiments, the second rib group 262 consists of a plurality of sequentially arranged ribs 263, wherein the number of ribs 263 is ≥1 and ≤4. For example, the second rib group 262 consists of two ribs 263.

[0139] The distance between the second rib group 262 and the leading edge 231 of the blade 230 is δ2, where δ2≥30mm and δ2≤80mm.

[0140] The distance between the second rib group 262 and the trailing edge 232 of the blade 230 is δ3, where δ3≥5mm and δ3≤30mm.

[0141] The thickness of blade 230 is α. δ2 and δ3 are directly proportional to α. The larger the thickness α of blade 230, the larger δ2. The smaller the thickness α of blade 230, the smaller δ2. The larger the thickness α of blade 230, the larger δ3. The smaller the thickness α of blade 230, the smaller δ3.

[0142] In some embodiments, refer to Figure 11The width of the rib 263 is w1, and the thickness of the blade 230 is α, where w1 ≥ 0.4α and w1 ≤ 0.8α. Setting w1 ≥ 0.4α ensures the width of the rib 263, which helps improve the structural strength of the blade 230. Setting w1 ≤ 0.8α ensures the structural strength of the blade 230 while avoiding excessive width of the rib 263, which would increase the weight of the blade 230 and increase raw material costs.

[0143] The thickness of the rib 263 is γ, where γ ≥ 0.1α and γ ≤ 0.3α. Setting γ ≥ 0.1α ensures the thickness of the rib 263, which helps improve the structural strength of the blade 230. Setting γ ≤ 0.3α ensures the structural strength of the blade 230 while avoiding excessive thickness of the rib 263, which would increase the weight of the blade 230 and increase raw material costs.

[0144] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0145] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An air conditioner, characterized in that, Includes an outdoor unit, said outdoor unit comprising: The housing is provided with an air inlet and an air outlet; A heat exchanger, disposed in the inner cavity of the housing, is configured to exchange heat with the flowing air; A fan, disposed within the inner cavity of the housing, is configured to provide power for air circulation; The characteristic is that the fan comprises: Electric motor; Fans, including: The mounting plate is connected to the power shaft of the motor; At least one blade is disposed on the outer peripheral wall of the mounting disk; At least one protrusion is disposed on the suction surface and / or pressure surface of the blade and is close to the tip of the blade.

2. The air conditioner according to claim 1, characterized in that, At least one of the protrusions is located near the leading edge of the blade, and at least one of the protrusions is located near the trailing edge of the blade.

3. The air conditioner according to claim 2, characterized in that, The protrusions near the tip and leading edge of the blade are the first protrusions, the protrusions near the tip and trailing edge of the blade are the second protrusions, and at least one third protrusion is provided between the first protrusion and the second protrusion. The area S1 of the first protrusion is greater than the area S2 of the second protrusion, which is greater than the area S3 of the third protrusion.

4. The air conditioner according to claim 2, characterized in that, The radius of the fan is R; The protrusions near the tip and leading edge of the blade are called the first protrusions. The first protrusions are circular and have a radius of R1, where R1 ≥ 0.2R and R1 ≤ 0.3R.

5. The air conditioner according to claim 2, characterized in that, The radius of the fan is R; The protrusions near the tip and trailing edge of the blade are called the second protrusions. The second protrusions are circular and have a radius of R2, where R2 ≥ 0.1R and R2 ≤ 0.15R.

6. The air conditioner according to claim 2, characterized in that, The radius of the fan is R; The protrusions near the tip and leading edge of the blade are designated as the first protrusions, and the protrusions near the tip and trailing edge of the blade are designated as the second protrusions. At least one third protrusion is provided between the first and second protrusions. The third protrusion is circular and has a radius of R3, where R3 ≥ 0.05R and R3 ≤ 0.1R.

7. The air conditioner according to any one of claims 1 to 6, characterized in that, A groove group is provided on the pressure surface of the blade. The groove group is located near the blade root and near the leading edge of the blade. The groove group includes multiple rows of groove portions. Any row of groove portions extends along the leading edge of the blade, and the multiple rows of groove portions are arranged at intervals along the circumference of the mounting plate.

8. The air conditioner according to claim 7, characterized in that, The groove depth of the groove increases along the direction from the trailing edge of the blade to the leading edge of the blade.

9. The air conditioner according to any one of claims 1 to 6, characterized in that, A first set of ribs is provided on the suction surface of the blade. The first set of ribs is close to the leading edge of the blade and extends along the leading edge. The first end of the first set of ribs is close to the trailing edge of the blade, and the second end of the first set of ribs is close to the mounting plate. A second set of ribs is also provided on the suction surface of the blade. The second set of ribs is close to the tip of the blade and extends along the tip of the blade. The first end of the second set of ribs is close to the first end of the first set of ribs, and the second end of the second set of ribs is close to the trailing edge of the blade.

10. The air conditioner according to claim 9, characterized in that, The thickness of the blade is α; The first rib group and the second rib group are composed of multiple ribs arranged at intervals, and the width of the ribs is w1, w1≥0.4α, w1≤0.8α; The thickness of the rib is γ, where γ ≥ 0.1α and γ ≤ 0.3α.

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