Design method for inner container of refrigerator

Abstract

The invention discloses a refrigerator liner design method, and belongs to the technical field of computer aided design. Comprising the following steps that according to the structural characteristics of the refrigerator inner container, the refrigerator inner container is divided into multiple modules; a plurality of persons perform three-dimensional modeling on the various modules on the UG software platform in parallel, and a module library is formed; various modules are selected from the module library according to the requirements of the overall design scheme, and the selected various modules are assembled together through a building block building method to form the finished refrigerator liner; and a new refrigerator liner can be designed by adding, reducing, replacing and changing corresponding modules. The modular design of the inner container can be used for parallel design of a plurality of designers, the design efficiency of the inner container is improved, the product development cycle is shortened, the product quality and reliability are improved, the mold opening and mold changing cost is reduced, the production cost and the part cost are further reduced, and considerable economic benefits are brought to enterprises.

Description

Technical Field

[0001] The invention relates to the technical field of computer-aided design, and in particular to a method for designing a refrigerator liner. Background Art

[0002] With the widespread application of computer-aided design technology, the design of industrial products pays more attention to intelligence, serialization and modularization. UG NX software is favored by designers for its powerful CAD / CAM / CAE and parametric design capabilities.

[0003] The traditional refrigerator liner design method adopts a step-by-step series drawing method, and only one designer designs it separately. Common assembly parts for the liner include: ceiling lights, air duct components, glass shelves, drawer rails, evaporators, return air pipes, electrical terminals, etc. The existing liner is to draw the main model while drawing the assembly structure of related parts, that is, series drawing, which leads to more than 500 steps in drawing the finished liner. If the drawing modification step is included, it is estimated to be at least 700 steps. These steps can only be completed by one designer, and the drawing time required is relatively long, about 1-2 weeks (excluding the time for modification after the scheme is changed). In addition, the design scheme often changes frequently, so the drawings need to be modified repeatedly. When the drawings are modified, the subsequent drawing steps often make mistakes, so the designer needs to spend a lot of time to modify the wrong steps. The existing liner design cycle and modification cycle are too long, which can no longer meet the market demand for rapid listing of new products, affecting the speed of new product listing, and thus failing to make the new product quickly occupy the market. Summary of the invention

[0004] The object of the present invention is to provide a method for designing a refrigerator liner, aiming to solve at least one of the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows:

[0005] A refrigerator liner design method, applied on the UG software platform, includes the following steps:

[0006] According to the structural characteristics of the refrigerator liner, the refrigerator liner is divided into multiple modules;

[0007] Multiple people perform 3D modeling of multiple modules on the UG software platform in parallel and form a module library;

[0008] Select multiple modules from the module library according to the overall design requirements, and assemble the selected multiple modules together in a building block method to form a finished refrigerator liner;

[0009] A new refrigerator liner can be designed by adding, subtracting, replacing or modifying corresponding modules.

[0010] As a further solution of the present invention: the multiple modules include basic modules and sub-feature modules, the sub-feature modules include general modules and special modules, and the basic modules, general modules and special modules together constitute the refrigerator inner tank.

[0011] As a further solution of the present invention: the universal module is designed as a three-dimensional model whose internal and external interfaces are not adjustable, and the dedicated module is designed as a three-dimensional model whose internal and external interfaces are adjustable according to parameters.

[0012] As a further solution of the present invention: the basic module includes an inner tank body; the universal module includes electrical terminal punching holes, evaporator fixing card punching holes, lining box punching holes, and ceiling light installation grooves; the special module includes a copper bar standard structure, a glass shelf, a drawer guide rail installation groove, and a frozen water tank.

[0013] As a further solution of the present invention: the modeling method of the basic module is: firstly modeling the symmetrical structure of the basic module, and then locally optimizing the asymmetrical structure after the basic module is fully formed.

[0014] As a further solution of the present invention: in the module library, the common structures of the basic modules are all solidified into the basic module design steps, and other structures of the basic modules that need to be adjusted are designed according to adjustable parameters, and the corresponding parameters in the expression can be changed.

[0015] As a further solution of the present invention: the modeling method of the universal module is as follows: the universal module is modeled by a standardization engineer according to parameterization, and then the parameters are removed to turn it into an entity.

[0016] As a further solution of the present invention: the changeable parameterized model of the common module is updated in a rolling manner by the standardization engineer according to the project or production feedback issues, so as to always ensure that the common module is in the latest state.

[0017] As a further solution of the present invention: the modeling method of the dedicated module is as follows: the dedicated module is designed by a standardization engineer or a relevant engineer according to a parameterized model, and the common parts of the dedicated module are all solidified and cannot be modified.

[0018] As a further solution of the present invention: other parameters of the special module can be modified by the designer according to the project technical solution to generate a new special module.

[0019] Beneficial effects of the present invention:

[0020] The present invention first divides the refrigerator liner into three modules according to the structural characteristics of the refrigerator liner: a basic module, a general module and a special module. The liner body is the basic module. In the design process of the liner, based on the basic module, according to the unified design principle of the internal interface and the external interface, a basic module + general module + special module building block assembly design method is adopted, and a new liner is formed by adding, subtracting, replacing and modifying the corresponding general module or special module. The modular design of the liner can be designed by multiple designers in parallel, which improves the efficiency of the liner design, shortens the product development cycle, improves product quality and reliability, reduces the cost of mold opening and mold modification, and then reduces the production cost and parts cost, bringing considerable economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of a refrigerator liner design method of the present invention;

[0023] Figure 2 It is a schematic diagram of the structure of the refrigerator liner of the present invention;

[0024] Figure 3 This is a diagram showing the design steps of the BCD-632 freezer liner according to the traditional method;

[0025] Figure 4 It is a diagram showing the design steps of BCD-529 refrigeration liner according to the modular method;

[0026] Figure 5 It is a parametric design display diagram of the basic module. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] As the market's requirements for personalized and differentiated refrigerator products become higher and higher, refrigerator companies need to meet the diverse needs of the market in an all-round way, which puts forward more stringent requirements and shorter design cycles for refrigerator design. During the refrigerator development process, the refrigerator liner needs to match the assembly of various parts, so the liner is the part with the longest design cycle and the most complex design. The traditional refrigerator liner design method (step-by-step serial drawing, only one designer designs alone) can no longer meet market demand, and the traditional design method of refrigerator liner is often prone to the following problems:

[0029] The structural error rate is high and the one-time development success rate of the liner is low.

[0030] The cost of mold modification increases year by year, resulting in high product development costs.

[0031] The product's technical foundation is relatively poor, and novices need a long time to accumulate experience during the design phase.

[0032] The design efficiency is low, and the designer’s main focus is often on confirming which structure to use.

[0033] In this context, the modular design of the refrigerator liner proposed in the present invention came into being. The modular design of the refrigerator liner can quickly shorten the design cycle, improve the one-time success rate of the product, greatly reduce the frequency of changing drawings and molds, limit the designer's arbitrary design, and achieve the best economic benefits and product quality.

[0034] See also Figure 1 As shown, the present invention provides a refrigerator liner design method based on the UG software platform. The refrigerator liner is drawn using a parallel design method. By dividing the liner into multiple modules and adopting a modular design method, multi-person parallel design is achieved, the efficiency of liner drawing is improved, and the one-time success rate of liner design is improved. The following steps are included:

[0035] According to the structural characteristics of the refrigerator liner, the refrigerator liner is divided into multiple modules;

[0036] Multiple people perform 3D modeling of multiple modules on the UG software platform in parallel and form a module library;

[0037] Select multiple modules from the module library according to the overall design requirements, and assemble the selected multiple modules together in a building block method to form a finished refrigerator liner;

[0038] A new refrigerator liner can be designed by adding, subtracting, replacing or modifying corresponding modules.

[0039] For example, see Figure 2 As shown, the refrigerator liner is divided into a basic module (liner body), a general module and a special module. The general module and the special module are sub-feature modules. The general module includes punching holes for electrical terminals, punching holes for evaporator fixing cards, punching holes for lining boxes, and ceiling light installation grooves, etc.; the special module includes a standard copper bar structure, a glass shelf, a drawer guide rail installation groove, a freezing water tank, etc.

[0040] The basic module of the refrigerator liner (liner body) can be divided into basic modules such as double-door refrigerators, French refrigerators, cross refrigerators, true cross refrigerators (i.e. the freezer is divided into two small inner liner) and small refrigerators according to product types; the general module is designed as a 3D model with non-adjustable internal and external interface designs to avoid arbitrary modifications by designers, such as the electrical terminal punching model, evaporator fixing card punching model, liner box punching model, ceiling light installation slot model, etc.; the special module is designed as a model that can be adjusted according to parameters according to the internal and external interface designs, such as the copper bar standard structure model, glass shelf model, drawer guide rail installation slot model, freezer water tank model, etc.

[0041] When designers receive the task of developing a refrigerator liner, they can select the corresponding basic modules from the module library according to the product type for design. Then, according to the overall design plan, they can use the building block method to assemble the latest sub-feature modules (general modules and special modules) required by the project from the module library into the basic modules. Finally, they can complete the liner design by performing assembly design.

[0042] It should be noted that the basic module, general module and special module of the refrigerator liner will be optimized in a rolling update manner according to the latest needs of production, quality or other departments to ensure the optimal state of the latest needs of each department. This can greatly save the time and cost of redesigning the drawings during the design review and liner blister review.

[0043] Modeling method of modular refrigerator liner 3D model:

[0044] According to the modular parallel design method of refrigerator liner, the three-dimensional model of the basic model, general model and special model of the refrigerator liner is established in the three-dimensional design software (UG). The biggest difference from the traditional liner modeling method is that the traditional liner design can only be designed step by step by a designer, while the modular parallel design of the liner can be designed by different designers in parallel, which speeds up the liner design speed and shortens the R&D cycle.

[0045] Basic module modeling method:

[0046] a. The liner body (i.e., basic module) is designed according to a symmetrical structure, and the asymmetrical part is locally optimized after the liner body is fully formed. This improves the design efficiency of the liner basic module and effectively prevents the liner basic module drawings from being changed, resulting in the failure of the basic module update and a large number of design step errors. It can also prevent low-level errors such as asymmetric left and right structures.

[0047] B. According to the drawing habit, after removing the general module and the special module from the left half of the liner, the other main parts are used as the basic module of the liner. The general structure of the basic module is all solidified into the basic module design steps. Other structures that need to be adjusted, such as the width, depth, height and other structures of the refrigerator, are all designed according to adjustable parameters (the parameters are set by user expressions in UG software, for example, the depth D = 600, if the depth is 540, 600 can be directly modified to 540 to generate the required new liner basic module). By changing the corresponding parameters in the expression, the basic module of the liner can be quickly designed (see Figure 5 ).

[0048] Modeling method of general modules:

[0049] The general module is designed by the standardization engineer according to the parameterization model, and then the parameters are removed to become a solid for other designers to choose, preventing designers from modifying the model. The changeable parametric model is updated by the standardization engineer according to the project or production feedback issues, so as to always ensure that the general module is in the optimal state.

[0050] Dedicated module modeling method:

[0051] The modeling method of special modules is the same as that of general modules, except that they are designed by standardization engineers or related engineers according to parameterization for other designers to choose from. The general parts are all fixed and cannot be modified, and other parameters (such as module depth, width, height, etc.) are for designers to modify according to the project technical plan to generate new special modules.

[0052] In order to more intuitively illustrate the implementation process of the liner modular design, the following is an example of the liner modularization of our company (see Figure 3 and Figure 4 ).

[0053] See also Figure 3 As shown, the BCD-632 freezer liner is designed according to the traditional method, and it takes 788 steps to complete the process; please refer to Figure 4 As shown, the BCD-529 freezer liner with similar structure is designed by modular method, completing 264 steps, including 1 double-door basic module + 10 general modules + 12 special modules, and the design efficiency and drawing modification efficiency are improved by at least 66%.

[0054] The following is a detailed description of the BCD-529 modular design method implementation method: First, according to the type of refrigerator, the main body uses the double-door basic module, and then according to the overall design plan, modify Figure 5The parameters in the user expression on the left (i.e. parametric design) can generate the new basic module model of the required refrigerator model liner; secondly, according to the overall design plan and the functional requirements of the refrigerator, select the established special modules from the module library. The special modules are not finished products, and the designer needs to modify the relevant parameters from the user expression according to the overall design plan, such as the refrigerator depth, refrigerator width, etc. Finally, according to the overall design plan and the functional requirements of the refrigerator, select the established general modules from the module library.

[0055] After the special modules and general modules are determined, these modules are assembled in the basic modules according to the positions of the sub-feature modules determined in the overall design plan, and then integrated together through conventional operations in the 3D software to form the finished liner.

[0056] For subsequent changes to the plan, you only need to change the parameters in the basic module, general module, or special module, or change the position of the sub-feature module to quickly complete the drawing changes. Even if there are step errors in the modified drawing, only the corresponding module has problems, and several steps need to be manually updated. Compared with the existing inner tank, which often requires dozens or hundreds of steps, the efficiency is significantly improved and the probability of error correction is greatly reduced accordingly.

[0057] The advantages of the modular parallel design method for refrigerator liner are:

[0058] Modular design improves the success rate of one-time development;

[0059] The modular design method of the liner allows multiple designers to design in parallel, further shortening the R&D cycle and improving R&D efficiency;

[0060] The rolling update of modules helps to avoid pitfalls and reduce the cost of remodeling;

[0061] Good technical inheritance, which is conducive to the training of new talents;

[0062] The combination of basic module + general module + special module design helps to limit the designer's arbitrary design, while reducing the designer's time for revising drawings and improving R&D efficiency;

[0063] The combination of basic module + general module + special module design is conducive to improving the consistency of appearance;

[0064] Modular design is conducive to integrating R&D resources and improving resource utilization;

[0065] The basic modules and some special modules can be designed according to the parametric method to quickly produce drawings by modifying the length, width and height of the refrigerator, further improving R&D efficiency.

[0066] The modularly designed inner tank has another notable feature, which is that it can unify the appearance style and improve the consistency of the appearance of refrigerator companies' products.

[0067] Economic Benefits

[0068] The specific economic benefits are as follows:

[0069] Quickly produce preliminary 3D drawings: It takes at least 7-12 days to produce preliminary 3D drawings for each module assembly design according to the plan drawings of traditional liner; it only takes 3-5 days to produce preliminary 3D drawings of modular liner, and it can ensure the one-time success rate of design (because basic modules, general modules and special modules are all updated in a rolling manner, which has solved the design problems and quality problems in the early stage);

[0070] Quickly change drawings: During the design process, the inner liner needs to be repeatedly changed according to the feedback information or review opinions of each module, so the time of changing drawings in the design process far exceeds the time of drawing the preliminary plan. Traditional drawings change the structure of the inner liner. Simple ones take about 1-2 days, and large changes in the plan take at least 5-10 days (too many steps, most of the design steps have errors, and designers need to compare and solve them one by one, which is very time-consuming and labor-intensive); modular inner liner, simple drawings change 0.5-1 day, large changes in the plan take up to 2-3 days (fewer design steps, and only need to change the basic module or the corresponding feature module, other steps will not go wrong).

[0071] Rapid assembly design and drawing finalization: The installation interface has been verified accordingly, and can be quickly called according to the position of the assembled parts in the assembly drawing. The size of the installation interface can be adjusted and matched according to the depth, width and height of the box.

[0072] Greatly improve the success rate of one-time design: For the traditional design of the liner, in addition to the change of the plan, a drawing basically needs to be changed 3-5 times, and the mold modification fee is relatively high. For example, the BCD-632 freezer liner was changed 3 times, and the mold modification fee was 19,000 yuan. The modular liner needs 1-2 times, and most of the changes are new structures. The BCD-529 freezer liner was changed once, and the mold modification fee was 1,000 yuan, and it was a new structure.

[0073] In summary, the modular design of the liner improves the efficiency of liner design, shortens the product development cycle, improves product quality and reliability, reduces the cost of mold opening and mold modification, and thus reduces production costs and component costs, bringing considerable economic benefits to the enterprise.

[0074] The above is a detailed description of the preferred embodiments of the present invention, which cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A refrigerator liner design method, applied on the UG software platform, characterized in that: The following steps are involved: According to the structural characteristics of the refrigerator liner, the refrigerator liner is divided into multiple modules; Multiple people perform 3D modeling of multiple modules on the UG software platform in parallel and form a module library; Select multiple modules from the module library according to the overall design requirements, and assemble the selected multiple modules together in a building block method to form a finished refrigerator liner; A new refrigerator liner can be designed by adding, subtracting, replacing or modifying corresponding modules.

2. A refrigerator liner design method according to claim 1, characterized in that: The multiple modules include basic modules and sub-feature modules, the sub-feature modules include general modules and special modules, and the basic modules, general modules and special modules together constitute the refrigerator inner tank.

3. A refrigerator liner design method according to claim 2, characterized in that: The general module is designed as a three-dimensional model whose internal and external interfaces are not adjustable, and the special module is designed as a three-dimensional model whose internal and external interfaces are adjustable according to parameters.

4. A refrigerator liner design method according to claim 3, characterized in that: The basic module includes an inner tank body; the universal module includes electrical terminal punching holes, evaporator fixing card punching holes, lining box punching holes, and ceiling light installation grooves; the special module includes a copper bar standard structure, a glass shelf, a drawer guide rail installation groove, and a freezing water tank.

5. A refrigerator liner design method according to claim 2, characterized in that: The modeling method of the basic module is: firstly modeling the symmetrical structure of the basic module, and then locally optimizing the asymmetrical structure after the basic module is completely formed.

6. A refrigerator liner design method according to claim 5, characterized in that: In the module library, the common structures of the basic modules are all solidified into the basic module design steps. Other structures of the basic modules that need to be adjusted are designed as adjustable parameters, and the corresponding parameters in the expression can be changed.

7. A refrigerator liner design method according to claim 2, characterized in that: The modeling method of the general module is as follows: the general module is designed by a standardization engineer according to parameterization, and then the parameters are removed to become a solid.

8. A refrigerator liner design method according to claim 7, characterized in that: The changeable parametric models of common modules are updated on a rolling basis by standardization engineers based on project or production feedback issues, ensuring that the common modules are always up to date.

9. A refrigerator liner design method according to claim 2, characterized in that: The modeling method of the special module is as follows: the special module is designed by a standardization engineer or a relevant engineer according to a parameterized model, and the common parts of the special module are all solidified and cannot be modified.

10. A refrigerator liner design method according to claim 9, characterized in that: The other parameters of the special module can be changed by the designer according to the project technical plan to generate a new special module.

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