Central Air Conditioning Engineering Training System

one、Product Overview:

Central Air Conditioning Engineering Training SystemThe teaching and practical training of courses such as "Refrigeration and Air Conditioning Machinery and Equipment", "Installation, Operation and Maintenance of Refrigeration and Air Conditioning Devices", "Refrigeration and Air Conditioning Automation and Mechatronics", "Air Conditioning Technology and Application" are suitable for majors such as mechanical and electrical equipment installation and maintenance, mechanical and electrical technology application, electrical operation and control, electrical technology application, motor and electrical appliances, refrigeration and air conditioning equipment application and maintenance in higher vocational colleges, secondary vocational schools, and undergraduate colleges.

2、 Function:

1. The equipment is designed based on the actual building fan coil unit+independent fresh air central air conditioning system project, using a stainless steel frame for object model design. It consists of six parts: cold water system, cooling water system, hot water boiler system, fresh air unit system, condensate water system, and control system.

2. The cold water system mainly consists of shell and tube evaporators, fan coil units, cold water pumps, cold water supply and return pipelines, expansion tanks, solenoid valves, flow switches, water dividers, and collectors. One of the two chilled water pumps is used as the main pump and the other as the backup chilled water pump. When the main pump is damaged, the backup water pump can be started for use. The installation of fan coil units can be carried out at the end, and the pipeline is designed with galvanized steel pipes. The cutting, threading, installation, and water pressure testing of galvanized steel pipes can be carried out. Through the control system, the cold water system can achieve the cold water function for the fan coil units and fresh air units, and realize the air conditioning function of the system.

3. The cooling water system mainly consists of shell and tube condensers, cooling towers, cooling water pumps, cooling water supply and return pipelines, flow switches, etc. Two cooling water pumps are used, one as the main pump and the other as a backup cooling water pump. When the main pump is damaged, the backup water pump can be started for use. The pipeline is designed with galvanized pipes, which can be cut, threaded, installed, and subjected to hydrostatic testing. The cooling function can be achieved through the control system.

4. The hot water boiler system mainly consists of electric heating boilers, hot water supply and return pipelines, heating water pumps, etc

5. The fresh air unit system mainly consists of fresh air units, supply and return air ducts, fresh air ducts, exhaust ducts, and air vents. The installation of fresh air units can be carried out, and the pipeline is mainly designed with PVC pipes. PVC pipe cutting, bonding, installation, and ventilation experiments can be carried out. End system: (L * W * H) 3000 * 2000 * 2000mm is assembled on-site and can be freely assembled during training.

6. The automatic control system mainly consists of PLC central control processor, touch screen, AC contact controller, control buttons, configuration software, etc. Implement automatic and manual control functions of the air conditioning system through the control system.

7. The equipment miniaturizes the central air conditioning system, using real components to ensure the integrity and rationality of the entire central air conditioning system. Can demonstrate summer cooling and winter heating conditions.

8. All refrigeration equipment and electrical control components adopt an open structure, which intuitively displays the system structure and working principle of the central air conditioning, and allows for a clear view of the physical components of the equipment. Students can receive equipment design and installation training according to different technical requirements.

9. Training on the Design, Layout, and Connection of Central Air Conditioning Cold Water System Pipelines; Practical training on commissioning, testing, and fault diagnosis of chiller units; Practical training on electrical parameter measurement, electrical circuit connection, and electrical control system debugging of chiller units; Provide metal brackets for lifting fan coil units; Valves for water pumps and cold water pipelines; There are two control methods: microcontroller and PLC.

3、 Technical parameters:

1. Working power supply: three-phase five wire AC380 V ± 10% 50Hz; leakage action current: ≤ 30mA;

2. Environmental temperature: Dry bulb temperature in summer 34.8 ℃, dry bulb temperature in winter -7.7 ℃

3. Relative humidity: 56% in summer and 45% in winter

4. Safety protection: equipped with four types of protection devices including overvoltage, overcurrent, overload, leakage, and grounding, in compliance with relevant national standards;

5. Overall dimensions: 5000mm × 2500mm × 1800mm

6. The maximum input total power of the device shall not exceed 10.5kW;

7. Refrigeration unit module size: (L × W × H) 1000 × 900 × 700mm;

10. Module size of air conditioning terminal system: (L × W × H) 3000 × 2000 × 2000mm;

11. Circulating water system module: (L × W × H) 1200 × 1200 × 1900mm;

12. Cooling tower module: (L × W × H) 700 × 700 × 1900mm;

13. The rated cooling capacity of the air conditioning cold water refrigeration unit is ≥ 7.5KW; the refrigeration unit module is (L * W * H) 1000 * 900 * 700mm,

14chilled water pump2 units: rated flow rate: 1.5 m3/h, lift 10m (one in use and one backup); Two air conditioning cooling water pumps with a rated flow rate of 1.5 m3/h and a head of 10m (one in use and one as backup);

15. One counter current cooling tower (LQ-3T)

16. 5 water collectors; One water separator for each of the five channels

17. One set of expansion water tank with a capacity of not less than 0.4m³

18. Training steel frame (simulated room), made of galvanized U-shaped steel, size: 3000mm × 2000mm × 2000mm;

19. 2 sets of fan coil units, rated cooling capacity: 2.1KW, external dimensions: 690mm × 480mm × 220mm;

20. 1 set of centralized fan unit, rated air volume: 400m³/h， Wind pressure 50Pa, rated power: 0.3KW, external dimensions 700mm × 600mm × 200mm;

21. Two sets of galvanized steel sheet air ducts, with a total plate size of 250MM * 140mm;

22. One digital temperature controller, temperature measurement range: -40~120 ℃;

23. The device shall be equipped with a TFT LCD touch screen of no less than 7 inches, with a resolution of 800 × 480dpi

24. Control mode: The device is equipped with Mitsubishi FX3U-32MTPLC programmable controller and microcontroller control in two ways

25. One set of PLC programming software; 1 set of central air conditioning configuration software

26. One set of frequency converter, input voltage: AC220V, output voltage: 0-380V, output frequency: 0-100Hz,

Output capacity:7.5KW；

27. External dimensions of aluminum alloy electrical control console: 1200mm × 600mm × 1500mm;

five、Central Air Conditioning Engineering Training System-Training content

1. Practical training on understanding the structure and equipment of central air conditioning;

2. Practical training on starting and stopping central air conditioning in winter and summer;

3. Practical training on the operation and regulation of central air conditioning water system;

4. Conduct testing and training on the operating conditions and various parameters of central air conditioning systems;

5. Provide practical training on advanced programming and installation, wiring, and debugging of programmable logic controllers (PLCs);

7. Application Training of Configuration Technology: Using configuration technology to achieve animated display of central air conditioning operation, operation data display, real-time monitoring, configuration and other functions;

8. Insulation and installation of pipelines, assessment

9. It can perform cutting, threading, installation, and hydrostatic testing operations on galvanized steel pipes,

10. Understanding and installation of fan coil units. operation and maintenance

11. Understanding and installation of fresh air units. operation and maintenance

12. Cutting, threading, installation, and hydrostatic testing operations of galvanized steel pipes

13. Cutting, threading, installation, and hydrostatic testing of PPR pipes

14. Installation and maintenance of system condensate water

15. Installation and maintenance of air supply ducts

16. Installation and maintenance of fresh air system