Method and device for optimizing fan assembly, fan assembly and computer readable storage medium

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses a method for optimizing a fan assembly, the fan assembly comprises a fan volute and an impeller located in the fan volute, and the impeller comprises a plurality of blades; the method comprises the steps that the molded line of the fan volute is determined; according to the molded line of the fan volute, the molded line of the blade is optimized; wherein the blade molded line is an arc-shaped curve of the blade cross section. According to the method, the molded line of the impeller blade is optimally designed through the determined molded line of the fan volute. The optimized blade molded line enables airflow flowing out of the air outlet of the blade to be smoother, vortex separation of blade rotation can be effectively restrained, and pneumatic noise is reduced. And meanwhile, the matching degree of the impeller and the fan volute is improved, and the pneumatic noise is further reduced. Therefore, the working efficiency of the fan can still be guaranteed under the condition that the back pressure exists, and the noise reduction effect is achieved. The invention further discloses a device for optimizing the fan assembly, the fan assembly and a computer readable storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, and for example, relates to a method and device for optimizing a fan assembly, a fan assembly, and a computer-readable storage medium. Background Art

[0002] An oil fume extractor usually has a fan assembly arranged in a smoke collecting hood to provide suction for the oil fume extractor to achieve the function of extracting oil fume. The fan assembly is a centrifugal fan composed of a volute impeller and an electric motor that drives the impeller to rotate. In the centrifugal fan, gas enters the impeller axially, changes to radial when flowing through the impeller, and then enters the volute. The volute includes a diffuser section. In the diffuser section, the gas changes the flow direction and causes deceleration, and the deceleration converts kinetic energy into pressure energy. In this way, the driving and guiding effects of the fan on the air flow are realized. When designing the fan in the oil fume extractor, it is generally under a non-backpressure condition. When the oil fume extractor is actually used under a backpressure condition, the actual flow field is worse than the designed flow field, resulting in problems such as low fan efficiency and high noise.

[0003] A volute, a centrifugal fan, and an oil fume extractor are disclosed in the related art. The profile line of the volute includes a first profile line segment, a second profile line segment, a third profile line segment, and a fourth profile line segment connected in sequence, and the two adjacent profile line segments are smoothly transitioned. The third profile line segment forms the main body of the volute, the second profile line segment forms the volute tongue of the volute, and the third profile line segment is located on a logarithmic spiral curve. Since the logarithmic spiral curve where the third profile line segment is located is an arc segment generated with the same center, the curvature of the third profile line segment is continuous. At the same time, by designing a reference circle, the radial gap between the logarithmic spiral curve and the reference circle is gradually increased. In this way, the change of the polar radius of the third profile line segment is continuous, reducing the error of the volute profile line, and not only can prevent the generation of eddy currents in the volute to reduce the noise of the volute.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] In the related art, the noise of the volute is reduced by designing the volute profile line. However, it does not disclose how to improve the matching degree of the volute and the impeller by designing the impeller.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but is presented as a preface to the subsequent detailed description.

[0008] Embodiments of the present disclosure provide a method and apparatus for optimizing a fan assembly, a fan assembly, and a computer-readable storage medium to optimize the structure of an impeller through a volute design, thereby improving the matching degree between the volute and the impeller.

[0009] In some embodiments, the fan assembly includes a fan volute and an impeller located within the fan volute. The impeller includes a plurality of blades. The method includes: determining the profile of the fan volute; optimizing the blade profile according to the profile of the fan volute; wherein the blade profile is an arc curve of the cross-section of the blade.

[0010] In some embodiments, the apparatus includes: a processor and a memory storing program instructions. The processor is configured to execute the method for optimizing the fan assembly as described above when running the program instructions.

[0011] In some embodiments, the fan assembly includes: a fan volute; an impeller rotatably located within the fan volute, the impeller including a plurality of blades; wherein the profile of the blades is determined based on the apparatus for optimizing the fan assembly as described above.

[0012] In some embodiments, the computer-readable storage medium stores program instructions that, when running, cause a computer to execute the method for optimizing the fan assembly as described above.

[0013] The method and apparatus for optimizing the fan assembly, the fan assembly, and the computer-readable storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0014] In the embodiments of the present disclosure, the profile of the impeller blades is optimized by determining the profile of the fan volute. The optimized blade profile makes the airflow flowing out of the air outlet of the blade smoother, effectively suppressing the vortex detachment during blade rotation and reducing the aerodynamic noise. At the same time, the matching degree between the impeller and the fan volute is improved, weakening the force generated by the high-speed airflow flowing out of the impeller impacting the volute wall, thereby reducing energy loss and further reducing the aerodynamic noise. In this way, the fan can still ensure the working efficiency of the fan and achieve a noise reduction effect under the condition of a backpressure working condition.

[0015] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0017] Figure 1 It is a schematic diagram of a method for optimizing a fan assembly provided by an embodiment of the present disclosure;

[0018] Figure 2 It is a schematic diagram of another method for optimizing a fan assembly provided by an embodiment of the present disclosure;

[0019] Figure 3 It is a schematic diagram of a method for determining the mid-arc point of a blade profile in the method provided by an embodiment of the present disclosure;

[0020] Figure 4 It is a schematic diagram of the structure of a fan from one perspective provided by an embodiment of the present disclosure;

[0021] Figure 5 It is a schematic diagram of the structure of a fan from another perspective provided by an embodiment of the present disclosure;

[0022] Figure 6 It is a schematic diagram of the sectional structure of a fan provided by an embodiment of the present disclosure;

[0023] Figure 7 It is an enlarged schematic diagram of the sectional structure of an impeller provided by an embodiment of the present disclosure;

[0024] Figure 8 It is a schematic diagram of a device for optimizing a fan assembly provided by an embodiment of the present disclosure.

[0025] Reference numerals:

[0026] 10, volute; 101, air inlet; 102, air outlet; 103, front wheel cover; 104, rear wheel cover; 105, connecting side plate; 20, impeller; 201, blade; 300: device for optimizing a fan assembly; 301, processor; 302, memory; 303, communication interface; 304, bus. Detailed implementation manners

[0027] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0028] In the description, claims, and above-mentioned drawings of the embodiments of the present disclosure, terms such as "first" and "second" are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0029] Unless otherwise specified, the term "plurality" means two or more.

[0030] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0031] The term "and / or" is an associative relationship describing an object, indicating that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0032] The term "corresponding" may refer to an associative relationship or a binding relationship. A corresponding to B means that there is an associative relationship or a binding relationship between A and B.

[0033] Combined Figure 1 As shown, the embodiments of the present disclosure provide a method for optimizing a fan assembly, including:

[0034] S101, the processor determines the profile of the fan volute.

[0035] S102, the processor optimizes the blade profile according to the profile of the fan volute.

[0036] Wherein, the blade profile is the arc curve of the blade cross-section.

[0037] Here, the processor refers to a processor with design software such as simulation modeling software. The profile of the fan volute is the profile of the volute along the cross-section perpendicular to the axis of the impeller. Specifically, the profile of the volute refers to the contour curve of the inner wall of the connecting side plate of the volute. Generally, the profile of the fan volute is an Archimedean spiral. Determining the profile of the fan volute means obtaining the profile parameters of the established fan volute, such as the number of segments of the fan volute profile, the radian parameters (arc length, the center of the circle where the radian is located, radius, etc.) of each profile segment. Furthermore, based on the established profile of the fan housing, the blade profile is designed and optimized. Among them, the blade profile refers to the arc curve of the blade cross-section, that is, the blade profile in the direction where the air flow flows in from the blade inlet and then flows out from the outlet.

[0038] Understandably, the impeller rotates at high speed to accelerate the gas, and then decelerates and changes the flow direction, converting kinetic energy into potential energy (i.e., pressure). In a centrifugal fan, the gas enters the blades of the impeller axially, flows through the blades and changes into a radial air flow, and then enters the volute. When the high-speed air flow enters the blades, if the profile of the blades does not match well with the profile of the fan volute, the impact force of the air flow flowing out of the blades on the volute is relatively large. At the same time, a turbulent boundary layer will be generated after the air flow passes through the blades, and the turbulent boundary layer can develop into vortex detachment, which will cause relatively large pulsation and increase the aerodynamic noise. Therefore, in the embodiments of the present disclosure, the blade profile is designed and optimized based on the profile of the fan volute. The matching of the blade profile and the volute profile can ensure that the high-speed air flow flowing out of the blade outlet will not be over-expanded in the volute, reducing the flow loss caused by backflow. This helps to reduce the noise of the fan under high static pressure work and achieve noise reduction.

[0039] Using the method for optimizing the fan assembly provided by the embodiments of the present disclosure, the profile of the impeller blades is optimized and designed based on the determined profile of the fan volute. The optimized blade profile makes the air flow flowing out of the air outlet of the blade smoother, can effectively suppress the vortex detachment during the rotation of the blade, and reduce the aerodynamic noise. At the same time, the matching degree between the impeller and the fan volute is improved, and the acting force generated by the high-speed air flow flowing out of the impeller impacting the volute wall is also weakened, thereby reducing the energy loss and further reducing the aerodynamic noise. In this way, the fan can still ensure the working efficiency of the fan and achieve the noise reduction effect under the condition of back pressure.

[0040] Optionally, in step S101, the processor determines the profile of the fan volute, including:

[0041] The processor determines the high-work curve of the fan volute corresponding to the high-work interval of the fan assembly. Among them, the high-work interval of the fan assembly is the area where the air flow velocity at the blade outlet is greater than the preset velocity.

[0042] Here, determining the profile of the fan volute mainly refers to determining the profile curve segment corresponding to the high-work interval of the fan assembly. Among them, the high work of the fan assembly indicates that the air flow velocity at the blade outlet is relatively fast. If the air flow with a relatively fast velocity cannot flow out smoothly at the blade outlet during blade rotation, vortex detachment is likely to occur, and the air flow will also be over-expanded in the volute and generate backflow. Among them, the faster the air flow velocity, the easier the above problems occur. Therefore, for the volute profile segment of the high-work curve, the blade profile is designed to ensure the smooth outflow of the high-speed air flow. In addition, the preset velocity can be reasonably set based on the fan model and fan parameters to determine the range of the high-work curve. As an example (taking Figure 6Taking the fan structure as an example), for a high-power fan, the type line segment corresponding to the fan volute type line in the direction from 3 o'clock to 9 o'clock is used as the high-work curve. As another example, for a general-purpose fan, the type line segment corresponding to the fan volute type line in the direction from 4 o'clock to 8 o'clock can be used as the high-work curve.

[0043] Combined with Figure 2 , optionally, in step S102, the processor optimizes the blade type line according to the type line of the fan volute, including:

[0044] S121, the processor selects any point on the high-work curve of the fan volute.

[0045] S122, the processor determines the mid-arc point of the blade type line according to the any point and the impeller rotation direction.

[0046] S123, the processor optimizes the blade type line so that the mid-arc point is the midpoint of the optimized blade type line.

[0047] Here, any point B is selected on the high-work curve determined above; then, according to the any point B and the impeller rotation direction, the mid-arc point A of the blade type line is determined. Specifically, the direction from the mid-arc point A to the any point B should be consistent with the impeller rotation direction. Combined with Figure 6 , if the impeller rotates clockwise, the mid-arc point A is located on the right side of the any point B. If the impeller rotates counterclockwise, the mid-arc point A is located on the left side of the any point B. Further, the specific position of point A can be determined based on the range of the angle between point A, point B and the impeller center point O. Exemplarily, based on the angle range, the connecting line segment between point A and the impeller center point is determined. And based on the distance from the blade center point of the impeller to the volute, point A is determined on the connecting line segment. Another exemplarily, based on the angle range, the connecting line segment between point A and the impeller center point is determined. Then, based on the relationship between the arc length between point A and point B and the distance from point A to the volute, the final point A is determined. Further still, after determining the mid-arc point A, the blade type line is designed and optimized based on this point so that the midpoint of the type line is the mid-arc point A. The blade type line designed in this way can effectively suppress the vortex detachment during blade rotation and reduce the aerodynamic noise.

[0048] Combined with Figure 3 , optionally, in step S122, the processor determines the mid-arc point of the blade type line according to the any point and the impeller rotation direction, including:

[0049] S1221, the processor establishes a rectangular coordinate system with the impeller center point as the coordinate origin.

[0050] S1222, the processor determines the first intersection point on the fan volute type line; the angle between the first intersection point, the any point and the coordinate origin satisfies a preset angle range, and the direction from the first intersection point to the any point is consistent with the impeller rotation direction.

[0051] In S1223, the processor takes an arbitrary point as the starting point to draw an arc tangent to the profile line of the fan housing at an arbitrary point, and takes the second intersection point where the arc intersects with the line connecting the first intersection point and the origin of coordinates as the mid-arc point; wherein, the linear distance between the second intersection point (serving as the mid-arc point) and the first intersection point and the arc length between the second intersection point and the arbitrary point satisfy a preset relationship.

[0052] Here, in combination with Figure 6 The steps for determining the mid-arc point of the blade profile are elaborated in detail. First, a rectangular coordinate system is established with the center point of the impeller. Then, based on a preset angle range and the rotation direction of the impeller, the first intersection point C on the profile line of the fan volute is determined. That is, the included angle α between OC and OB is within the preset angle range, and the direction from point C to point B is the same as the rotation direction of the impeller. The mid-arc point B of the blade profile is on the line segment OC. Secondly, taking an arbitrary point B as the starting point, an arc tangent to the volute profile at point B is drawn, and this arc has a second intersection point with the line segment OC. It can be understood that there is not only one arc satisfying the above conditions, and there may be multiple arcs, that is, there are multiple second intersection points. Therefore, it is necessary to further screen and determine the final mid-arc point from multiple second intersection points. Finally, the second intersection point satisfying the preset relationship is selected as the mid-arc point. Specifically, the preset relationship refers to the relationship between the linear distance between the second intersection point and the first intersection point and the arc length between the second intersection point and the arbitrary point, that is, the relationship between the line segment AC and the arc AB. Among them, the preset relationship is determined based on the pressure recovery of the air flow on the inner wall of the volute to ensure that the pressure recovery will not be excessive. Thus, the loss caused by backflow is avoided.

[0053] Optionally, in step S1223, the linear distance between the second intersection point and the first intersection point and the arc length between the second intersection point and the arbitrary point satisfy a preset relationship, including:

[0054] 0.9L ≤ R ≤ 1.1L;

[0055] wherein, L is the linear distance between the second intersection point and the first intersection point, and R is the radius of the circle where the arc length between the second intersection point and the arbitrary point is located.

[0056] Here, the preset relationship is explained. When the above preset relationship is satisfied, it can be ensured that the high-speed air flow flowing out of the blade outlet will not have excessive pressure recovery in the volute, resulting in backflow and causing flow loss. At the same time, this setting condition also weakens the acting force generated by the high-speed air flow impacting the volute wall surface, reduces energy loss, and reduces aerodynamic noise. Under the high static pressure work of the volute, it helps to reduce the noise of the fan and achieve noise reduction. When R is less than 0.9L, the distance between the blade and the volute is relatively close, and the impact force of the flowing air flow on the volute is relatively large, which is easy to generate relatively large noise. When R is greater than 1.1L, the distance between the volute and the impeller is relatively far, and the volute has excessive pressure recovery, which is easy to generate backflow air flow and cause loss. Therefore, 0.9L ≤ R ≤ 1.1L. Exemplarily, the radius R of the arc AB can be 0.9L, L, 1.1L, etc.

[0057] Optionally, in step S1222, the preset included angle range is 20° to 30°.

[0058] Here, the blade profile needs to match the high work interval, so that the airflow flowing out of the blade outlet is smoother, which can effectively suppress the vortex detachment during blade rotation and reduce the aerodynamic noise. At the same time, it also helps to reduce the force generated by the high-speed airflow flowing out of the impeller hitting the volute wall, reduce energy loss, and further reduce the aerodynamic noise. When a is less than 20°, the airflow impact force flowing out of the blade outlet is relatively large, and it is easy to generate relatively large noise. When a is greater than 30°, the deviation direction of the airflow flowing out of the blade is relatively large, which interferes with the direction of impeller rotation, affecting the air volume and the working efficiency of the fan. Therefore, when the preset included angle range is 20° to 30°, the matching degree between the blade profile and the high work interval is higher.

[0059] Optionally, in step S123, the processor optimizes the blade profile so that the mid-arc point is the midpoint of the optimized blade profile, including:

[0060] The processor makes an arc curve with the mid-arc point as the midpoint, so that the arc curve is tangent to the arc between the mid-arc point and the first intersection point at the mid-arc point.

[0061] The processor uses this arc curve as the optimized blade profile.

[0062] Here, the mid-arc point of the blade refers to the midpoint of the blade curve in the cross-section perpendicular to the impeller axis. The blade profile makes an arc curve tangent to this point with the mid-arc point as the midpoint. In this way, the airflow flowing out of the blade matches the airflow direction in the volute, thereby reducing the number of vortices in the volute flow field and reducing the noise during the operation of the fan. In addition, the arc curve can be a circular arc line, a parabola or other curves, etc.

[0063] Combined Figure 8 As shown, the embodiment of the present disclosure provides a device 300 for optimizing a fan assembly, including a processor 301 and a memory 302. Optionally, the device 300 may further include a communication interface 303 and a bus 304. Among them, the processor 301, the communication interface 303, and the memory 302 can complete mutual communication through the bus 304. The communication interface 303 can be used for information transmission. The processor 301 can call the logical instructions in the memory 302 to execute the method for optimizing the fan assembly in the above embodiment.

[0064] In addition, when the logical instructions in the above-mentioned memory 302 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0065] The memory 302 is a computer-readable storage medium that can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 301 executes the function application and data processing by running the program instructions / modules stored in the memory 302, that is, the method for optimizing the fan component in the above embodiment is implemented.

[0066] The memory 302 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 302 may include a high-speed random access memory and may also include a non-volatile memory.

[0067] Combination Figures 4 - 7 As shown, an embodiment of the present disclosure provides a fan assembly including: a fan volute 10, an impeller 20 and a motor. The impeller 20 is rotatably located in the fan volute 10, and the impeller 20 includes a plurality of blades 201. The motor is drivingly connected to the impeller 20, and the motor can drive the impeller 20 to rotate around its axis in the volute 10. Among them, the profile of the blade 201 is determined based on the device for optimizing the fan assembly as described above. It can be understood by those skilled in the art that the device 300 for optimizing the fan assembly can be adapted to a feasible product body, thereby realizing other feasible embodiments.

[0068] like Figure 4 , 5 As shown, the volute 10 includes a front wheel cover 103, a rear wheel cover 104, and a connecting side plate 105 connected between the front wheel cover 103 and the rear wheel cover 104. The front wheel cover 103, the rear wheel cover 104, and the connecting side plate 105 enclose an installation cavity, and the impeller 20 is located in the installation cavity. Among them, the air inlet 101 is located on the front cover plate or the rear cover plate, and the motor is connected to the side of the volute 10 away from the air inlet 101, so that the air flow can pass through the air inlet 101 and enter the impeller 20 from the axial direction of the impeller 20. The air outlet 102 of the volute 10 is arranged on one side of the volute 10, and the air flow in the impeller 20 flows out of the impeller 20 along the radial direction of the impeller 20 through the blades 201 of the impeller 20, and then flows into the volute 10, and under the action of the volute 10, flows out from the air outlet 102.

[0069] like Figures 5 to 7 As shown, the blade 201 is an arc-shaped structure that is tilted, and the tilt direction of the blade 201 is consistent with the rotation direction of the fan, so that a spiral airflow can be formed when the airflow enters the fan.

[0070] like Figure 6As shown in the figure, the profile line of the volute 10 includes a first straight line segment DE, a volute tongue profile line segment EF, a spiral line segment FJ, and a second straight line segment JK that are sequentially arranged in the circumferential direction and smoothly connected. Among them, the spiral line segment FJ includes a high-work interval. The connection line between the center O of the impeller 20 and any point B on the high-work curve is OB, and the connection line between the center O of the impeller 20 and the mid-arc point A of a blade 201 is OA. The connection line between point A and point B forms an arc AB, and the arc AB is tangent to the spiral line segment FJ at point B, and the arc AB is tangent to the curve of the blade 201 at point A. The included angle α between OB and OA satisfies 20° ≤ α ≤ 30°. When the impeller 20 rotates clockwise, OA and OB are arranged in sequence clockwise. When the impeller 20 rotates counterclockwise, OA and OB are arranged in sequence counterclockwise. The connection point of the extension line of OA along the radial direction of the impeller 20 and the volute 10 is C, and the length of the connection line AC is L. Among them, the radius of the arc AB is R, and 0.9L ≤ R ≤ 1.1L.

[0071] In addition, the air flow velocity at the outlet of the blade 201 corresponding to the second spiral line segment GJ in the volute 10 is relatively high, resulting in a relatively high back pressure of the volute 10 at the second spiral line segment GJ. Therefore, the second spiral line segment GJ is a high-work interval, and any point B in the second spiral line segment GJ and the mid-arc point A of its corresponding blade 201 satisfy the relationship of any one of the above in this application, which can improve the air flow outflow velocity of the blade 201 corresponding to the second spiral line segment GJ section, reduce the fan noise, reduce the energy loss, and improve the fan efficiency.

[0072] The embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are set to execute the above method for optimizing the fan assembly.

[0073] The technical solution of the embodiments of the present disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The foregoing storage medium may be a non-transitory storage medium, such as: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc, etc., which are various media that can store program codes.

[0074] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. The embodiments merely represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing the embodiments and do not limit the claims. As used in the description of the embodiments and the claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations of one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups of these. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, or apparatus comprising the element. Herein, each embodiment may focus on the differences from other embodiments, and the same or similar parts among the embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts may refer to the description of the method parts.

[0075] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The skilled person may use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The skilled person can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be elaborated herein.

[0076] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or units can be in electrical, mechanical, or other forms. The units described as separate components can be or can not be physically separated. The components displayed as units can be or can not be physical units, that is, they can be located in one place or can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit.

[0077] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the block can occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks can also occur in a different order than that disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. Each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for optimizing a fan assembly, characterized in that, The fan assembly includes a fan volute and an impeller located within the fan volute, and the impeller includes a plurality of blades; the method includes: Determine the profile of the fan volute; Optimize the blade profile according to the profile of the fan volute; Wherein, the blade profile is an arc curve of the cross-section of the blade.

2. The method according to claim 1, characterized in that, Determining the profile of the fan volute includes: Determine the high-work curve of the fan volute corresponding to the high-work interval of the fan assembly; Wherein, the high-work interval of the fan assembly is the region where the air flow velocity at the blade outlet is greater than a preset velocity.

3. The method according to claim 2, wherein Optimizing the blade profile according to the profile of the fan volute includes: Select any point on the high-work curve of the fan volute; Determine the mid-arc point of the blade profile according to the any point and the impeller rotation direction; Optimize the blade profile so that the mid-arc point is the midpoint of the optimized blade profile.

4. The method according to claim 3, characterized in that, Determining the mid-arc point of the blade profile according to the any point and the impeller rotation direction includes: Establish a rectangular coordinate system with the center point of the impeller as the coordinate origin; Determine the first intersection point on the fan volute profile; the included angle between the first intersection point, the any point and the coordinate origin satisfies a preset included angle range, and the direction from the first intersection point to the any point is the same as the impeller rotation direction; Make an arc tangent to the fan housing profile at the any point with the any point as the starting point, and take the second intersection point where the arc intersects the line connecting the first intersection point and the coordinate origin as the mid-arc point; wherein, the straight-line distance between the second intersection point and the first intersection point and the arc length between the second intersection point and the any point satisfy a preset relationship.

5. The method according to claim 4, characterized in that, The straight-line distance between the second intersection point and the first intersection point and the arc length between the second intersection point and the any point satisfy a preset relationship, including: 0.9L ≤ R ≤ 1.1L; Wherein, L is the straight-line distance between the second intersection point and the first intersection point, and R is the radius of the circle where the arc length between the second intersection point and the any point is located.

6. According to the method of claim 4, wherein, The preset included angle range is 20° to 30°.

7. The method according to claim 4, characterized in that Optimizing the blade profile so that the mid-arc point is the midpoint of the optimized blade profile includes: Make an arc curve with the mid-arc point as the midpoint, so that the arc curve is tangent to the arc between the mid-arc point and the first intersection point at the mid-arc point; Take the arc curve as the optimized blade profile.

8. A device for optimizing a fan assembly, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to execute the method for optimizing the fan assembly according to any one of claims 1 to 7 when running the program instructions.

9. A fan assembly, characterized in that, Including: Fan volute; An impeller rotatably located within the fan volute, and the impeller includes a plurality of blades; Wherein, the profile of the blade is determined based on the device for optimizing the fan assembly according to claim 8.

10. A computer-readable storage medium storing program instructions, characterized in that, When the program instructions are running, they are used to cause the computer to execute the method for optimizing the fan assembly according to any one of claims 1 to 7.

Images