CN112149326B - Optimized design method and device for evaporator fins of indoor unit of air conditioner - Google Patents
Optimized design method and device for evaporator fins of indoor unit of air conditioner Download PDFInfo
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- CN112149326B CN112149326B CN202010895230.4A CN202010895230A CN112149326B CN 112149326 B CN112149326 B CN 112149326B CN 202010895230 A CN202010895230 A CN 202010895230A CN 112149326 B CN112149326 B CN 112149326B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
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- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0067—Indoor units, e.g. fan coil units characterised by heat exchangers by the shape of the heat exchangers or of parts thereof, e.g. of their fins
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
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Abstract
The application provides an air conditioner indoor unit evaporator fin optimization design method and device, which are used for establishing a finite element model for designed evaporator fins with notches and metal tubes and establishing a finite element model of a bending tool model. And then, setting the finite element model of the bending tool as the finite element model acting on the evaporator fin and the metal tube to obtain the bending finite element model of the evaporator fin, namely, realizing bending simulation of the evaporator fin by using the bending tool. And solving to obtain bending result data of the evaporator bending finite element model when the bending finite element model meets the bending parameters. And further checking whether the bending result data meets the corresponding design requirements, if not, directly modifying the notch parameters of the evaporator fins, and then performing bending simulation on the modified evaporator fins until the bending result data meets the corresponding design requirements to obtain the final notch design parameters of the evaporator fins. The scheme reduces the development cost of the fin and shortens the development period.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an optimal design method for fins of an evaporator of an indoor unit of an air conditioner and a related device.
Background
The air conditioner indoor unit evaporator fin is a heat transfer element based on the temperature regulation of an indoor unit, and the evaporator fin needs to be provided with a notch and is bent and formed along the notch. The evaporator fin is assembled in a specific design space of the indoor unit, and is used for improving heat exchange efficiency and preventing water leakage.
The notches of the evaporator fins are designed reasonably to be assembled in the specific design space of the indoor unit. In the related art, the notch design of the evaporator fin depends on engineering experience, and the position effect of the bent fin is simply determined by rotating the bent fin around a notch fixed point through CAD, so that the design error is large. Moreover, in the stage of verifying the design scheme, a fin sample piece needs to be produced firstly, and the fin sample piece is bent to verify the position of the bent fin, so that the verification precision is low, the times of changing the die and making the sample piece are increased, the development cost of the evaporator fin is high, and the development period is long.
Disclosure of Invention
In view of this, the present invention aims to provide an optimal design method and apparatus for fins of an evaporator of an indoor unit of an air conditioner, so as to solve the problems of high development cost and long development period caused by the fact that a fin sample needs to be bent to verify whether the fin design meets the requirements, and the disclosed technical solution is as follows:
in a first aspect, the present application provides a method for optimally designing fins of an evaporator of an indoor unit of an air conditioner, including:
establishing a finite element model according to a three-dimensional structure diagram of the evaporator fin with the notch, establishing a finite element model according to a three-dimensional structure diagram of the metal tube penetrating through each evaporator fin, and establishing a finite element model corresponding to the bending tool model;
setting a finite element model of the bending tool model to act on the finite element models of the evaporator fin and the metal tube, and setting bending parameters to obtain the bending finite element model of the evaporator fin;
solving bending result data corresponding to the evaporator fin bending finite element model meeting the bending parameters, wherein the bending result data comprises strain data and displacement after the evaporator fin is bent;
and checking whether the bending result data meet the corresponding preset design requirements or not, if not, modifying the notch parameters of the evaporator fin, creating a modified finite element model of the evaporator fin according to the modified notch parameters and obtaining a new bending finite element model of the evaporator fin until the bending result data meet the preset design requirements, and obtaining the notch parameters of the evaporator fin meeting the requirements.
Optionally, the setting of the finite element model of the bending tooling model acts on the evaporator fin and the finite element model of the metal tube, and the bending parameters are set to obtain the bending finite element model of the evaporator fin, including:
setting the bending tool model as a rigid body, and setting the evaporator fin and the metal tube as deformable bodies;
respectively contacting two side surfaces of a stationary section of the evaporator fin with a fixed surface in the bending tool model, and contacting a side surface of a rotating section of the evaporator fin with a rotating surface in the bending tool model;
determining bending parameters of the evaporator fin, wherein the bending parameters comprise a rotation central point and a preset rotation angle;
and applying a rotary load around a fixed shaft to a rotary surface in the bending tool model so as to enable the rotary section to rotate around a rotary center point according to a preset rotary direction.
Optionally, the modifying the notch parameter of the evaporator fin comprises: modifying at least one of a number, a shape, a location, and a size of the cuts on the evaporator fin.
Optionally, the verifying whether the bending result data meets corresponding preset design requirements includes:
checking whether the rotation central point in the bending result data and the displacement of the bent evaporator fin meet corresponding design requirements or not;
and if at least one of the rotation center point and the displacement does not meet the design requirement, determining that the bending result data does not meet the corresponding preset design requirement.
And if the rotation central point and the displacement both meet the design requirements, determining that the bending result data meets corresponding preset design requirements.
Optionally, the method further comprises:
and when the bending result data meet the corresponding preset design requirements, determining that the notch parameters of the evaporator fin meet the design requirements.
In a second aspect, the present application further provides an optimized design device for fins of evaporator of indoor unit of air conditioner, comprising:
the model creating module is used for creating a finite element model according to the three-dimensional structure diagram of the evaporator fin with the notch, creating a finite element model according to the three-dimensional structure diagram of the metal tube penetrating through each evaporator fin and creating a finite element model corresponding to the bending tool model;
the bending simulation model creating module is used for setting a finite element model of the bending tool model to act on the evaporator fin and the finite element model of the metal tube, and setting bending parameters to obtain the evaporator fin bending finite element model;
the bending result acquisition module is used for solving bending result data corresponding to the evaporator fin bending finite element model when the bending parameters are met, and the bending result data comprises strain data and displacement of the bent evaporator fin;
the bending checking module is used for checking whether the bending result data meet corresponding preset design requirements or not;
and the notch parameter modification module is used for modifying the notch parameters of the evaporator fins when the bending result data does not meet the preset design requirement, creating a modified finite element model of the evaporator fins according to the modified notch parameters and obtaining a new bending finite element model of the evaporator fins until the bending result data meets the preset design requirement, and obtaining the notch parameters of the evaporator fins meeting the requirement.
Optionally, the bending simulation model creating module includes:
the first model parameter setting submodule is used for setting the bending tool model as a rigid body and setting the evaporator fin and the metal tube as deformable bodies;
the second model parameter setting submodule is used for respectively contacting two side surfaces of the fixed section of the evaporator fin with a fixed surface in the bending tool model and contacting a side surface of the rotating section of the evaporator fin with a rotating surface in the bending tool model;
the bending parameter determining submodule is used for determining bending parameters of the evaporator fin, and the bending parameters comprise a rotation central point and a preset rotation angle;
and the third model parameter setting submodule is used for applying a rotating load around a fixed shaft to a rotating surface in the bending tool model so as to enable the rotating section to rotate around a rotating center point according to a preset rotating direction.
Optionally, the notch parameters of the evaporator fin include: modifying at least one of a number, a shape, a location, and a size of the cuts on the evaporator fin.
Optionally, the bending verification module includes:
the parameter checking submodule is used for checking whether the rotation center point in the bending result data and the displacement of the bent evaporator fin meet corresponding design requirements or not;
and the first determining submodule is used for determining that the bending result data does not meet the corresponding preset design requirement when at least one of the rotation center point and the displacement does not meet the design requirement.
And the second determining submodule is used for determining that the bending result data meets the corresponding preset design requirement when the rotation central point and the displacement both meet the design requirement.
Optionally, the apparatus further comprises:
and the fin notch parameter determining module is used for determining that the notch parameters of the evaporator fin meet the design requirements when the bending result data meet the corresponding preset design requirements.
According to the method for optimally designing the evaporator fin of the indoor unit of the air conditioner, a finite element model is established for the designed evaporator fin with the notch and the metal tube penetrating through the fin, and meanwhile, a finite element model of a bending tool model is established. And then, setting the finite element model of the bending tool as the finite element model acting on the evaporator fin and the metal tube to obtain the bending finite element model of the evaporator fin, namely, realizing bending simulation of the evaporator fin by using the bending tool. And solving to obtain bending result data of the evaporator bending finite element model when the bending finite element model meets the bending parameters. And further checking whether the bending result data meets the corresponding design requirements, if not, directly modifying the notch parameters of the evaporator fins, and then performing bending simulation on the modified evaporator fins until the bending result data meets the corresponding design requirements to obtain the final notch design parameters of the evaporator fins. According to the process, the method does not need to produce and bend the corresponding evaporator fin sample piece, and can judge whether the current fin meets the design requirements or not only by bending the evaporator fin and simulating, so that the development cost of the fin is greatly reduced, and the development period is shortened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart of an optimal design method for fins of an evaporator of an indoor unit of an air conditioner according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an evaporator fin provided in an embodiment of the present application;
FIG. 3 is an effect view of the evaporator fin shown in FIG. 2 after bending;
FIG. 4 is a schematic structural diagram of a finite element model for obtaining bending of an evaporator fin according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an optimal design device for evaporator fins of an indoor unit of an air conditioner according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a bending simulation model creation module according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a flowchart of an optimal design method for an evaporator fin of an indoor unit of an air conditioner according to an embodiment of the present application is shown, where the method can determine whether notch design parameters of the evaporator fin meet design requirements. As shown in fig. 1, the method mainly comprises the following steps:
s110, establishing a finite element model according to the three-dimensional structure diagram of the evaporator fin with the notch, establishing the finite element model according to the three-dimensional structure diagram of the metal tube penetrating through each evaporator fin, and establishing the finite element model corresponding to the bending tool model.
The cut parameters on the evaporator fins are designed by developers according to fin design requirements, and for example, the cut parameters can comprise the number, the position, the shape, the size and other parameters of the cut. The metal tube penetrates through the stacked fins to fix the fins, and can be a copper tube.
Referring to fig. 2, a schematic structural diagram of an evaporator fin according to an embodiment of the present disclosure is shown, where the evaporator fin includes a bending center point 1, a bending inner notch 2, a first bending outer notch 3, a second bending outer notch 4, an opening line 5, and a metal tube hole 6. Wherein the metal pipe holes 6 are used for placing metal pipes.
In the bending, the portion of the fin below the opening line 5 is fixed, and the portion above the opening line 5 is rotated clockwise by a predetermined angle, and the effect after bending is shown in fig. 3.
In one embodiment of the application, a three-dimensional structure diagram of the currently designed evaporator fin is imported into Hypermesh software, and the evaporator fin and the metal tube are subjected to grid division in the Hypermesh software. The two-dimensional shell mesh division model comprises triangular meshes and quadrilateral meshes, wherein the triangular meshes are too rigid, so that the proportion of the quadrilateral meshes is not lower than 95%.
Meanwhile, the bending tool model is simplified, only the action surface is reserved, and the two-dimensional shell grid division model is adopted to perform grid division on the bending tool model.
And S120, setting a finite element model of the bending tool model to act on the finite element models of the evaporator fin and the metal tube, and setting bending parameters to obtain the bending finite element model of the evaporator fin.
In one embodiment of the present application, as shown in fig. 4, S120 may include the steps of:
s121, setting the bending tool model as a rigid body, and setting the evaporator fin and the metal tube as deformable bodies.
After the grid division is completed, the grid plane of the bending tool model is set to be a rigid body, and the fins and the metal tubes are set to be deformed bodies. And endowing the fin and the metal tube with elastic-plastic material parameters, and endowing the bending tool with rigid material parameters.
And S122, respectively contacting two side surfaces of the stationary section of the evaporator fin with a fixed surface in the bending tool model, and contacting a side surface of the rotating section of the evaporator fin with a rotating surface in the bending tool model.
Action surfaces in the finite element models respectively provided with the bending tool act on the finite element models of the evaporator fin and the metal tube. The fixing surfaces in the bending tool model act on the left side surface 7 and the right side surface 7 below the opening line 5 in the figure 2; the rotating surface in the bending tool model acts on the left side surface of the portion below the opening line 5 in fig. 2.
And S123, determining bending parameters of the evaporator fins.
The bending parameters comprise a rotation center point and a preset rotation angle. It should be noted that the rotation center point and the preset rotation angle are parameters already determined when the fin is designed.
And S124, applying a rotating load around the fixed shaft to a rotating surface in the bending tool model so as to enable the rotating section to rotate around the rotating center point according to a preset rotating direction.
And S130, solving bending result data corresponding to the evaporator fin bending finite element model meeting the bending parameters.
And exporting the set evaporator fin bending finite element model into a solver format file, rad, and solving bending result data of the evaporator fin bending finite element model by adopting a radio ss solver, namely a bending result obtained after bending simulation is carried out on the evaporator fin according to designed bending parameters.
In an embodiment of the application, hyperview post-processing software can be used for checking the bending process and acquiring bending result data after bending. The bending result data may include displacement of the evaporator fin after bending, that is, displacement of a portion of the fin above the opening line 5.
In addition, the bending result data can also comprise the strain and stress of the fin in the bending process.
The object is deformed to some extent under the action of external force, and the degree of deformation is called strain. When an object is deformed by an external factor (e.g., a change in stress, humidity, or temperature field), an internal force is generated between the respective parts in the object, and the internal force per unit area is referred to as a stress.
S140, checking whether the bending result data meet corresponding preset design requirements; if the preset design requirement is not met, executing S150; if the preset design requirement is satisfied, S160 is performed.
In one embodiment of the present application, it is determined whether the rotation center point meets the design requirement, and then it is determined whether the final displacement of the fin after the fin is bent by the preset rotation angle meets the design requirement, that is, whether the installation gap requirement of other components inside the air conditioner is met.
If at least one of the rotation center point and the displacement does not meet the design requirement, determining that the notch parameter of the fin does not meet the preset design requirement; and if the two parameters meet the design requirements, determining that the notch parameters of the fin meet the corresponding design requirements.
And S150, modifying the notch parameters of the evaporator fin.
In one embodiment of the present application, the modifiable incision parameters include number of incisions, shape, location, size, and the like.
After the notch parameters are modified, the finite element model of the evaporator fin needs to be modified according to the modified notch parameters, and the modified fin is subjected to bending simulation to obtain new bending result data. And judging whether the new bending result data meets the preset design requirements again.
And after S150 is executed, the process returns to S110, and the processes from S110 to S150 are repeatedly executed until the bending result data meet the corresponding preset design requirements.
And S160, obtaining the design scheme of the evaporator fin notch meeting the requirements.
And if the bending result data of the fin meets the corresponding requirements, determining that the notch parameters of the fin meet the corresponding design requirements, and determining that the fin notch design scheme can be adopted for batch production.
In the method for optimally designing the evaporator fin of the indoor unit of the air conditioner, a finite element model is established for the designed evaporator fin with the notch and the metal tube penetrating through the fin, and meanwhile, a finite element model of a bending tool model is established. And then, setting the finite element model of the bending tool as the finite element model acting on the evaporator fin and the metal tube to obtain the bending finite element model of the evaporator fin, namely, realizing bending simulation of the evaporator fin by using the bending tool. And solving to obtain bending result data of the evaporator bending finite element model when the bending finite element model meets the bending parameters. And further checking whether the bending result data meets the corresponding design requirements, if not, directly modifying the notch parameters of the evaporator fins, and then performing bending simulation on the modified evaporator fins until the bending result data meets the corresponding design requirements to obtain the final notch design parameters of the evaporator fins. According to the process, whether the current fin meets the design requirement can be judged only by bending the evaporator fin and simulating without producing and bending the corresponding evaporator fin sample piece, so that the development cost of the fin is greatly reduced, and the development period is shortened.
Corresponding to the embodiment of the method for optimally designing the evaporator fins of the indoor unit of the air conditioner, the application also provides an embodiment of a device for optimally designing the evaporator fins of the indoor unit of the air conditioner.
Referring to fig. 5, a schematic structural diagram of an apparatus for optimally designing fins of an evaporator of an indoor unit of an air conditioner according to an embodiment of the present application is shown, and as shown in fig. 5, the apparatus may include:
the model creating module 110 is used for creating a finite element model according to the three-dimensional structure diagram of the evaporator fin with the notch, creating a finite element model according to the three-dimensional structure diagram of the metal tube penetrating through each evaporator fin, and creating a finite element model corresponding to the bending tool model;
and the bending simulation model creating module 120 is used for setting a finite element model of the bending tool model to act on the finite element models of the evaporator fin and the metal tube, and setting bending parameters to obtain the evaporator fin bending finite element model.
In one embodiment of the present application, as shown in FIG. 6, bending simulation model creation module 120 may include:
the first model parameter setting submodule 121 is used for setting the bending tool model as a rigid body, and setting the evaporator fin and the metal tube as a deformable body.
And the second model parameter setting submodule 122 is used for respectively contacting two side surfaces of the stationary section of the evaporator fin with a fixed surface in the bending tool model and contacting a side surface of the rotating section of the evaporator fin with a rotating surface in the bending tool model.
And the bending parameter determining submodule 123 is configured to determine bending parameters of the evaporator fin, where the bending parameters include a rotation center point and a preset rotation angle.
And the third model parameter setting submodule 124 is used for applying a rotating load around the fixed shaft to a rotating surface in the bending tool model so as to enable the rotating section to rotate around the rotating center point according to the preset rotating direction.
And the bending result obtaining module 130 is configured to solve bending result data corresponding to the evaporator fin bending finite element model meeting the bending parameters, where the bending result data includes strain data and displacement after the evaporator fin is bent.
And the bending checking module 140 is configured to check whether the bending result data meets corresponding preset design requirements.
In one embodiment of the present application, bend verification module 140 includes:
the parameter checking submodule is used for checking whether the rotation central point in the bending result data and the displacement of the bent evaporator fin meet corresponding design requirements or not;
and the first determining submodule is used for determining that the bending result data does not meet the corresponding preset design requirement when at least one of the rotation center point and the displacement does not meet the design requirement.
And the second determining submodule is used for determining that the bending result data meets the corresponding preset design requirement when the rotation central point and the displacement meet the design requirement.
And the notch parameter modification module 150 is used for modifying the notch parameters of the evaporator fins when the bending result data does not meet the preset design requirements, creating a modified finite element model of the evaporator fins according to the modified notch parameters and obtaining a new bending finite element model of the evaporator fins until the bending result data meets the preset design requirements, and obtaining the notch parameters of the evaporator fins meeting the requirements.
Wherein, the incision parameter of evaporator fin includes: at least one of the number, shape, location and size of the cuts on the evaporator fin is modified.
And the fin notch parameter determining module 160 is configured to determine that notch parameters of the evaporator fin meet design requirements when the bending result data meets corresponding preset design requirements.
The optimized design device for the evaporator fin of the indoor unit of the air conditioner, provided by the embodiment, is used for establishing a finite element model for the designed evaporator fin with the notch and a metal tube penetrating through the fin, and meanwhile, establishing a finite element model of a bending tool model. And then, setting the finite element model of the bending tool as the finite element model acting on the evaporator fin and the metal tube to obtain the bending finite element model of the evaporator fin, namely, realizing bending simulation of the evaporator fin by using the bending tool. And solving to obtain bending result data of the evaporator bending finite element model when the bending finite element model meets the bending parameters. And further checking whether the bending result data meets the corresponding design requirements, if not, directly modifying the notch parameters of the evaporator fins, and then performing bending simulation on the modified evaporator fins until the bending result data meets the corresponding design requirements to obtain the final notch design parameters of the evaporator fins. According to the process, the corresponding evaporator fin sample piece does not need to be produced and bent, whether the current fin meets the design requirements can be judged only by bending the evaporator fin and simulating, the development cost of the fin is greatly reduced, and the development period is shortened.
A computing device is provided that includes a processor and a memory having stored therein a program executable on the processor. When the processor runs the program stored in the memory, the optimal design method of the evaporator fin of the indoor unit of the air conditioner is realized.
The application also provides a storage medium which can be executed by the computing equipment, wherein a program is stored in the storage medium, and when the program is executed by the computing equipment, the optimal design method of the air conditioner indoor unit evaporator fin is realized.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
It should be noted that technical features described in the embodiments in the present specification may be replaced or combined with each other, each embodiment is mainly described as a difference from the other embodiments, and the same and similar parts between the embodiments may be referred to each other. For the device-like embodiment, since it is basically similar to the method embodiment, the description is simple, and reference may be made to the partial description of the method embodiment for relevant points.
The steps in the method of the embodiments of the present application may be sequentially adjusted, combined, and deleted according to actual needs.
The device and the modules and sub-modules in the terminal in the embodiments of the present application can be combined, divided and deleted according to actual needs.
In the several embodiments provided in the present application, it should be understood that the disclosed terminal, apparatus and method may be implemented in other manners. For example, the above-described terminal embodiments are merely illustrative, and for example, the division of a module or a sub-module is only one logical function division, and other division manners may be available in actual implementation, for example, a plurality of sub-modules or modules may be combined or integrated into another module, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
The modules or sub-modules described as separate parts may or may not be physically separate, and parts that are modules or sub-modules may or may not be physical modules or sub-modules, may be located in one place, or may be distributed over a plurality of network modules or sub-modules. Some or all of the modules or sub-modules can be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, each functional module or sub-module in the embodiments of the present application may be integrated into one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated into one module. The integrated modules or sub-modules may be implemented in the form of hardware, or may be implemented in the form of software functional modules or sub-modules.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An optimal design method for fins of an evaporator of an indoor unit of an air conditioner is characterized by comprising the following steps:
establishing a finite element model according to a three-dimensional structure diagram of the evaporator fin with the notch, establishing a finite element model according to a three-dimensional structure diagram of the metal tube penetrating through each evaporator fin, and establishing a finite element model corresponding to the bending tool model;
setting a finite element model of the bending tool model to act on the finite element models of the evaporator fin and the metal tube, and setting bending parameters to obtain the bending finite element model of the evaporator fin;
solving bending result data corresponding to the evaporator fin bending finite element model when the bending parameters are met, wherein the bending result data comprises strain data and displacement after the evaporator fin is bent;
and checking whether the bending result data meet the corresponding preset design requirements or not, if not, modifying the notch parameters of the evaporator fin, creating a modified finite element model of the evaporator fin according to the modified notch parameters and obtaining a new bending finite element model of the evaporator fin until the bending result data meet the preset design requirements, and obtaining the notch parameters of the evaporator fin meeting the requirements.
2. The method according to claim 1, wherein the step of setting the finite element model of the bending tooling model to act on the finite element models of the evaporator fin and the metal tube and setting bending parameters to obtain the bending finite element model of the evaporator fin comprises the following steps of:
setting the bending tool model as a rigid body, and setting the evaporator fin and the metal tube as deformable bodies;
respectively contacting two side surfaces of a stationary section of the evaporator fin with a fixed surface in the bending tool model, and contacting a side surface of a rotating section of the evaporator fin with a rotating surface in the bending tool model;
determining bending parameters of the evaporator fin, wherein the bending parameters comprise a rotation central point and a preset rotation angle;
and applying a rotating load around a fixed shaft to a rotating surface in the bending tool model so as to enable the rotating section to rotate around a rotating center point according to a preset rotating direction.
3. The method of claim 1, wherein said modifying a notch parameter of said evaporator fin comprises: modifying at least one of a number, a shape, a location, and a size of the cuts on the evaporator fin.
4. The method according to claim 1, wherein the verifying whether the bending result data meets corresponding preset design requirements comprises:
checking whether the rotation central point in the bending result data and the displacement of the bent evaporator fin meet corresponding design requirements or not;
if at least one of the rotation center point and the displacement does not meet the design requirement, determining that the bending result data does not meet the corresponding preset design requirement;
and if the rotation central point and the displacement both meet the design requirements, determining that the bending result data meets corresponding preset design requirements.
5. The method of claim 4, further comprising:
and when the bending result data meet the corresponding preset design requirements, determining that the notch parameters of the evaporator fin meet the design requirements.
6. The utility model provides an air conditioning indoor set evaporimeter fin optimal design device which characterized in that includes:
the model creating module is used for creating a finite element model according to the three-dimensional structure diagram of the evaporator fin with the notch, creating a finite element model according to the three-dimensional structure diagram of the metal tube penetrating through each evaporator fin and creating a finite element model corresponding to the bending tool model;
the bending simulation model creating module is used for setting a finite element model of the bending tool model to act on the evaporator fin and the finite element model of the metal tube, and setting bending parameters to obtain the evaporator fin bending finite element model;
the bending result acquisition module is used for solving bending result data corresponding to the evaporator fin bending finite element model when the bending parameters are met, and the bending result data comprises strain data and displacement of the bent evaporator fin;
the bending checking module is used for checking whether the bending result data meet corresponding preset design requirements or not;
and the notch parameter modification module is used for modifying the notch parameters of the evaporator fins when the bending result data does not meet the preset design requirement, creating a modified finite element model of the evaporator fins according to the modified notch parameters and obtaining a new bending finite element model of the evaporator fins until the bending result data meets the preset design requirement, and obtaining the notch parameters of the evaporator fins meeting the requirement.
7. The apparatus of claim 6, wherein the bend simulation model creation module comprises:
the first model parameter setting submodule is used for setting the bending tool model as a rigid body and setting the evaporator fin and the metal tube as deformable bodies;
the second model parameter setting submodule is used for respectively contacting two side surfaces of the fixed section of the evaporator fin with a fixed surface in the bending tool model and contacting a side surface of the rotating section of the evaporator fin with a rotating surface in the bending tool model;
the bending parameter determining submodule is used for determining bending parameters of the evaporator fin, and the bending parameters comprise a rotation central point and a preset rotation angle;
and the third model parameter setting submodule is used for applying a rotating load around a fixed shaft to a rotating surface in the bending tool model so as to enable the rotating section to rotate around a rotating center point according to a preset rotating direction.
8. The apparatus of claim 6, wherein the evaporator fin cut parameters comprise: modifying at least one of a number, a shape, a location, and a size of the cuts on the evaporator fin.
9. The apparatus of claim 6, wherein the bend verification module comprises:
the parameter checking submodule is used for checking whether the rotation central point in the bending result data and the displacement of the bent evaporator fin meet corresponding design requirements or not;
the first determining submodule is used for determining that the bending result data do not meet corresponding preset design requirements when at least one of the rotation center point and the displacement does not meet the design requirements;
and the second determining submodule is used for determining that the bending result data meets the corresponding preset design requirement when the rotation central point and the displacement both meet the design requirement.
10. The apparatus of claim 6, further comprising:
and the fin notch parameter determining module is used for determining that the notch parameters of the evaporator fin meet the design requirements when the bending result data meet the corresponding preset design requirements.
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