DYLR-72 Household Split Air Conditioner Experimental Platform
Release time：2024-06-19 05:30viewed：times
This equipment is a product developed in accordance with the requirements of the Ministry of Education's "Revitalizing the 21st Century Vocational Education Curriculum Reform and Textbook Construction Plan" and the teaching and tr*ning requirements of vocational education. It is suitable for teaching and tr*ning devices such as refrigeration technology, refrigeration fluid machinery , principle and m*ntenance of household refrigeration equipment, cold storage and refrigeration technology, and refrigeration equipment rep*rman (primary, intermediate, and advanced) tr*ning in higher vocational colleges and vocational schools. Cultivate skilled application talents who master the professional theoretical knowledge and professional practical skills of *r conditioning and refrigeration technology, and engage in technical upgrading, transformation design, installation, commissioning, m*ntenance, rep*r, and technical management of *r conditioning,
refrigeration equipment and systems. The household split *r conditioner skill tr*ning and assessment table is also suitable for courses such as "Refrigeration Equipment Rep*rman (Primary, Intermediate, and Advanced)", "Principle and M*ntenance of Household Refrigeration Equipment", "Operation, Installation and M*ntenance of Refrigeration and Air Conditioning Devices", "Small Refrigeration Devices", and "Small Refrigeration and Air Conditioning Devices" in technical schools, vocational tr*ning schools, vocational education centers, and appr*sal stations/institutes.
I. Device Features
1. The tr*ning device intuitively displays the system structure and working principle of the heat pump split *r conditioner. The refrigeration cycle system structure and m*n components can be clearly seen. The system is also equipped with an AC voltmeter, AC ammeter, temperature gauge, vacuum pressure gauge, signal light and light-emitting diode to make the real-time working status of the entire split *r conditioning system clear at a glance; the control system schematic is printed in the middle of the m*n panel, and corresponding test points are set; it is convenient for teaching demonstrations and students to understand and master textbook knowledge. In addition, a sight glass is set in the pipeline to observe the state of the refrigerant; the high-pressure pipeline is the red part, and the low-pressure pipeline is the blue part. The corresponding components are all named and identified
2. The system uses a real 1-horsepower refrigeration unit, which is in line with actual teaching. The entire *r conditioning system is real and complete, and the overall structure and performance are exactly the same as those of the remote-controlled heat pump *r conditioners on the market. It has functions such as cooling, heating , ventilation, dehumidification, temperature, wind speed selection, timing, wind sweep control, sleep, and automatic
. 3. The whole tr*ning device integrates refrigeration system, electrical control system, and fault simulation system. The system is real and complete, with clear and compact structure. It is consistent with the actual *r-conditioning refrigeration system and electrical system, and meets the requirements for practical tr*ning
. 4. It can simulate fault settings. Students can analyze the possible causes of faults according to the process, determine the scope of the fault, and troubleshoot. It is conducive to the development of skills appr*sal and assessment work
. 5. The device is equipped with an outdoor unit component electrical control circuit wiring area, which can complete the electrical connection, compressor winding judgment, etc., which is conducive to students applying theory to practice and cultivating students' practical operation skills.
2. Technical performance
1. Input power: single-phase three-wire ~ 220V ± 10% 50Hz
2. Device capacity: <1kVA
3. Dimensions: 1000mm × 590mm × 1610mm
4. Refrigerant type: R22
5. Safety protection: with leakage voltage and leakage current protection devices, safety meets national standards
3. Basic equipment of the device
The tr*ning device consists of a control panel, a tr*ning table, an *r-conditioning outdoor unit, an *r-conditioning indoor unit, a measuring instrument, a simulated fault detection unit, a simulated fault box, etc.
1. Tr*ning table : iron double-layer matte dense spray structure, aluminum panel. The desktop is a fireproof, waterproof, wear-resistant high-density board with a solid structure. It has two locked drawers for placing fault boxes, tools and materials. The structure of the refrigeration system pipeline can be observed on the back of the device. There is a p*r of cabinet doors in the front to simulate the dirty and blocked condenser of the outdoor unit. When you open it, you can observe the actual outdoor unit
. 2. 1 set of *r conditioning unit: including some necessary components for heat pump split *r conditioners, such as indoor unit (evaporator), outdoor unit (condenser, compressor, four-way valve), etc. The pipeline is also equipped with control valves and other components necessary for practical tr*ning.
3. AC power control unit: single-phase three-wire 220V AC power supply, 1 AC voltmeter, Measuring range 0~250V, used to monitor the grid voltage; 1 AC ammeter, measuring range 0~10A, used to observe the system starting current and monitor the normal working current of the system, the leakage protector controls the total power supply of the control panel, and the power supply of the control panel is controlled by the key switch
4. Refrigeration system pressure detection unit: 2 vacuum pressure gauges are provided, with measuring ranges of -0.1~1.5MPa and -0.1~3.5MPa respectively, which can display the pressure on the low-pressure side and the high-pressure side when the system is working
5. Temperature detection unit: 4 temperature gauges are provided, using PT100 sensors , three-and-a-half-digit digital display, respectively measuring the *r inlet temperature, *r outlet temperature, condenser temperature and evaporator temperature
6. 1 simulation fault setting box: The simulation fault setting is diversified. The refrigeration fault settings include evaporator dirty blockage, condenser dirty blockage, capillary dirty blockage, and capillary ice blockage; the electrical fault setting types include power supply circuit, temperature sensor circuit, drive circuit, compressor protection circuit, indoor fan speed control circuit and other twelve fault points.
7. Single-chip microcomputer , PLC programmable design and control virtual simulation software:
This software is developed based on Unity3D, with built-in experimental steps, experimental instructions, circuit diagrams, component lists, connection lines, power on, circuit diagrams, scene reset, return and other buttons. After the connection and code are correct, the 3D machine model can be operated by the start/stop, forward motion, and reverse motion buttons . When the line is connected, the 3D machine model can be enlarged/reduced and translated.
1. Relay control: Read the experimental instructions and enter the experiment. By reading the circuit diagram, select relays, thermal relays, switches and other components in the component list and drag and drop them into the electrical cabinet. The limiter is placed on the 3D machine model. You can choose to cover the cover. Some component names can be renamed. Then click the connection line button to connect the terminals to the terminals. After the machine circuit is successfully connected, choose to turn on the power and operate. If the component or line connection is wrong, an error box will pop up, and the scene can be reset at any time.
2. PLC control: The experiment is the same as the relay control, with the addition of PLC control function. After the connection is completed, press the PLC coding button to enter the program writing interface, write two programs, forward and reverse, with a total of 12 ladder diagram symbols. After writing, select Submit to verify the program. After successful verification, turn on the power to operate. If there is a component, line connection, or code error, an error box will pop up, and the scene can be reset at any time.
3. MicrocontrollerControl: The experiment is the same as the relay control, with the microcontroller control function added. After the connection is completed, enter the programming interface through the C coding button, enter the correct C language code, submit the verification successfully, turn on the power to operate, and the component, line connection, and code errors will pop up an error box, and the scene can be reset at any time.
4. Tr*ning projects
Basic skills tr*ning for junior technicians
Basic operation of special tools for refrigeration systems Welding of refrigeration
system pipes Leak detection of refrigeration systems Vacuuming and filling of refrigerant R22 in refrigeration systems Intermediate skills tr*ning (design, installation, debugging and m*ntenance) Circuit principle of *r-conditioning m*n control board Measurement of *r-conditioning electrical components and system operation Air-conditioning f*lure and analysis
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