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"Microwave oven m*ntenance skills tr*ning and assessment device" is based on the "Education Industry Standards of the People's Republic of China - Professional Instruments and Equipment Equipment Standards for Electronic Technology Applications" and in accordance with the "Household Electronics Rep*rer" Vocational Skills issued by the Ministry of Labor and Social Security of the People's Republic of China. "Technical Specifications for Practical Tr*ning and Appr*sal Equipment", a product developed in accordance with the teaching and tr*ning requirements of vocational education. It is suitable for practical tr*ning and teaching of professional courses such as applied electronic technology, electronic and electrical application and m*ntenance, and electromagnetic waves in higher vocational colleges and vocational schools.
This tr*ning device is also suitable for practical electromagnetic m*ntenance operations of home appliance majors and home appliance rep*rmen in technical schools, vocational tr*ning schools, vocational education centers, appr*sal stations/institutes , and primary and intermediate skill appr*sal assessments.
2. System characteristics
1. Compatibility: This tr*ning device adopts the design of separation of electrical control and physical objects, which can clearly display the relationship between the electrical part and the actuator. The electrical control adopts microprocessor integrated circuit, and the object is the mechanical entity structure, and can easily and accurately test the relevant Parameters such as voltage and current, and special wires for connecting each tr*ning component are fully equipped. The performance and specifications of the supporting components are closely combined with the needs of practical tr*ning to meet the practical tr*ning teaching of corresponding courses in various schools.
2. Practicality This device has a practical tr*ning and assessment function. According to the skill appr*sal requirements, teachers can easily set hidden faults. Students can be more exposed to typical microwave oven faults, conduct troubleshooting tr*ning, and improve students' troubleshooting abilities. Complete students' practical tr*ning in various skills such as cognition, installation, debugging, and m*ntenance; and can conduct assessments and record the number of misalignments to conduct a more f*r assessment of students.
3. Comprehensive The practical tr*ning content is rich and the working principles are clear and clear, so that students can be exposed to and master the working methods of microwave ovens as much as possible, and improve students' comprehensive abilities and m*ntenance skills.
3. Technical performance
1. Input power: single-phase three-wire ~ 220V±10% 50Hz
2. Working environment: temperature -10℃～+40℃, relative humidity <85% (25℃), altitude <4000m
3.Complete machine capacity: <300VA
4. Safety protection: action current ≤ 30mA, action time ≤ 0.1s
5. Overall dimensions: 170cm×93cm×135.5cm
4. System composition
This device consists of a physical microwave oven, an electrical control panel, a tr*ning and assessment system and an experimental bench .
1. Physical microwave oven: It m*nly consists of four parts: power supply, magnetron, oven cavity, and oven door.
2. Electrical control panel: The electrical control system of the microwave oven, including microwave generation circuit, magnetron control circuit, status display circuit, timing circuit, safety protection circuit and other units;
3. Practical tr*ning assessment system: The fault setting mechanism adopts a concealed design. Students can eliminate faults through the troubleshooting unit according to the fault phenomenon. The assessment time and process can be fully recorded and monitored;
4. Tr*ning control cabinet: The overall adopts a three-dimensional cabinet structure and is equipped with four universal wheels with brakes, which is easy to move and fix, and is conducive to the layout of the tr*ning room. The cabinet is made of waterproof, fireproof and wear-resistant aluminum alloy material, with solid structure and beautiful appearance. At the same time, the physical object and the control panel can be closely integrated to facilitate students' operation.
5. Teacher teaching design system: Based on unity3d design, users can choose different interactive interface sizes according to computer configuration, and six levels of image quality can be selected. 4 types of cylindrical gear shafting components, 4 types of bevel gear shafting components, and 6 types of worm shafting components are av*lable for installation, disassembly, assembly, parts measurement (divided into shaft measurement and base measurement), assessment, etc. There are intelligent reminders during the steps of disassembly and assembly of parts. Students manually select the corresponding parts and move them to the shaft structure. Only by selecting the parts in the correct order can they be installed. The models in the software are all 3D models, produced by 3Dmax, and After rendering and polishing, the model looks the same as the real part. It has a non-standard parts library (8 types of parts), a standard parts library (12 types of parts), and a measurement tool library (steel ruler, vernier caliper) for disassembly and assembly. choose. The software is equipped with integrated electronic experiment assessment questions and instructions for the purpose, steps, and requirements of the experiment. When using the assessment function, questions are given for students to answer. When students finish answering the questions, assessment scores are given. There are 12 questions in total. Each question is set to 8 points (one of the questions is a multiple-choice question, accounting for 12 points). Only the selected The answer leads to the next question. The software needs to be able to rotate, zoom in, and zoom out in all directions to view its det*ls. The software must be on the same platform as a whole and must not be displayed as separate resources.
5. Practical tr*ning content
1. Understanding and testing of m*n components of microwave ovens, control chips, and display devices
2. Understanding the structure of microwave oven and its disassembly and assembly
3. Common faults and detection and m*ntenance of microwave oven microwave generating circuits
4. Principle analysis and physical demonstration of microwave heating
5. Common faults and detection and m*ntenance of microwave oven control circuit and timing circuit
6. Common faults and detection and m*ntenance of microwave oven voltage conversion circuit
7. Inspection and m*ntenance of microwave protection devices
8. Detection and rep*r of common faults of microwave ovens
9. F*lure analysis and troubleshooting of leakage safety protection alarm system
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