DYLR-KD air conditioning system and electrical skills training device
Release time：2024-06-18 11:30viewed：times
I. Overview
1. The *r conditioning system and electrical skills tr*ning equipment is developed based on the vocational technology and vocational qualification tr*ning materials for " Refrigeration Equipment Rep*rer" organized and compiled by the Ministry of Labor and Social Security of the People's Republic of China and the "Opinions of the Ministry of Education on Strengthening the Tr*ning of Talents in Higher Vocational Education". This tr*ning device is suitable for the practical tr*ning of professional courses such as "Refrigeration Basics", "Refrigeration Equipment Rep*rer", "Air Conditioner M*ntenance", and "Air Conditioning Technology" offered by colleges, technical schools, higher vocational colleges, and technical schools.
2. This tr*ning equipment m*nly uses *r conditioning compressors, condensers, evaporators, dry filters and other devices as tr*ning platforms. Students can use various tr*ning tools to complete refrigeration pipeline tr*ning such as pipe cutting, pipe bending, pipe expansion, welding, fluorination, and leak detection. It is suitable for technical schools and vocational schools as a tr*ning of basic refrigeration skills.
3. The equipment has a set of capillary throttling methods, and understands the traditional refrigeration throttling methods.
4. The equipment has a set of electronic expansion valves and controllers, and understands the traditional refrigeration electronic throttling methods, so as to better control the refrigeration superheat and subcooling.
II. Functional characteristics
1. The device integrates refrigeration *r conditioning, refrigeration system electrical wiring, pressure leak detection, vacuuming, refrigerant filling and operation debugging, including all the steps of refrigeration system m*ntenance, which can meet the needs of practical tr*ning and actual engineering tr*ning.
2. The device adopts modular design, the electrical control and refrigeration system are separated independently, and the electrical part is equipped with detection points, test terminals and output connection terminals of each channel, which can be used by students for independent wiring, testing, long-distance operation and other operations.
3. The tr*ning platform intuitively displays the system structure and working principle of the *r conditioner. The physical objects of the refrigeration system structure and m*n components can be clearly seen. The system is also equipped with voltmeters, AC ammeters, pressure gauges, signal indicators, etc., so that the real-time working status of the entire *r conditioning system and refrigerator system can be seen at a glance.
4.. This tr*ning device uses a compressor as the tr*ning object. The entire compressor is fixed on a work surface, which is both beautiful and convenient for students to operate. This device can also be used for pressurizing and vacuuming *r-conditioning systems. The entire device adopts a modular design. Students can recycle and reuse the refrigerant in the *r conditioner during *r-conditioning tr*ning, which can save a lot of social tr*ning costs.
5. Using this device, you can learn the control circuit and knowledge of split *r conditioners. The *r heat pump split *r conditioner has the following four working modes: cooling mode, heating mode, dehumidification mode, and *r supply mode. There are three working modes: standard mode, energy-saving mode, and quick freezing mode. 6.
This device solves the shortcomings of traditional equipment of this type that can only be viewed and simulated but not assembled by hand, and also solves the problem of not being able to weld copper pipes on the equipment, so that students can repeatedly perform system assembly and welding tr*ning on the device. The overall open and detachable structure design is adopted, and the innovative copper pipe fixing device is used to fix each movable joint, which effectively prevents the damage caused by repeated disassembly and assembly of the pipeline, and also reduces the working noise.
7. A new design has been made for the tr*ning platform. Not only is the desktop assembled with aluminum profiles, but a water receiving chassis is added under the desktop. The aluminum profile desktop is not only clean and beautiful, but more importantly, it will not deform when welding copper pipes. The design of the water receiving chassis solves the condensation water generated by the condenser and system pipelines during operation.
8 Refrigeration capacity adjustment control device:
1) When the *r conditioning refrigeration compressor is running, the high exhaust temperature will seriously affect the life of the compressor. By controlling the system refrigerant flow, the compressor can be effectively reduced from entering the working area with too high exhaust temperature. Extend the life of the compressor and improve the operating efficiency of the unit. Therefore, the complete set of electronic throttling system should have the function of adjusting the high exhaust temperature. By monitoring the exhaust temperature, the opening degree of the shadow valve can be adjusted and corrected according to the dynamic changes of the exhaust temperature of the compressor. The flow of the system throttling can be fine-tuned automatically. For example, when the exhaust volume is greater than 105 degrees, the temperature rises by 1 degree. The opening degree of the silk will automatically increase by 2-5 steps. By adjusting the refrigerant flow rate, it is clear that the exhaust temperature of the compressor can be effectively reduced and the compressor's efficient working range can be expanded. It can be seen that the exhaust temperature is very important for the control of the electronic expansion valve!
2) Software control can control the temperature of the system online, read the flow opening of the unit's refrigeration refrigerant at the optimal temperature system, and adjust the superheat and subcooling of the refrigeration unit. The left side of the text display interface displays the current unit's operating data in real time in the form of text. In the upper part of the right side of the interface, the communication information is displayed, including the communication role and the set value of the communication port and the display of the current communication status. In the "data information" in the lower part of the right side of the interface, it displays which data frame is currently received, the address of the received data frame, and other information. It has an offline manual adjustment function for upper computer adjustment:
A) Real-time temperature detection: The controller simultaneously detects the system's refrigeration multi-point temperature (4 channels)
B) Control object: 500P opening setting.
C) Control parameters can be set: All control-related temperature parameters and time parameters in the controller can be adjusted to adapt to different equipment.
D) Temperature and opening can be displayed and queried: All detected temperatures of the controller can be queried and the opening can also be queried and displayed in real time.
E). Adjustment function: During the development and commissioning stage of the unit, the manual adjustment function of the controller can be used to obt*n valid test data.
F) Automatic adjustment: The equipment has a power-off memory function when it is running to keep the current value unchanged.
G) The digital tube display displays the opening, temperature and fault code online.
III. Technical indicators
1. Input power: single-phase three-wire AC220V±10% 50Hz
2. Working environment: temperature -10℃～-40℃ relative humidity ≤85% (25℃)
3. Equipment capacity: ≤1.5KVA
4. Refrigerant: R22 for *r conditioning part
5. Dimensions (approximately) 1500mm×800mm×1250mm
6. Anti-electric shock protection type Class I
7. Safety protection: It has overvoltage, overcurrent, overload and leakage protection measures, which meet the relevant national standards.
8. Environmental protection grade material selection meets the relevant national environmental protection standards
IV. System composition
1. The tr*ning platform adopts an aluminum profile frame plus a tr*ning module structure. The device adopts an integrated design and consists of a r*l-type aluminum alloy installation platform, an *r conditioning system, an electrical control system, etc. Four casters with brakes are installed at the bottom, which can be easily moved and fixed. The equipment is equipped with 1 set of *r conditioning and refrigeration system pipelines, a safety plug terminal block, 1 pressure gauge (1.5MPa), 1 (3.5MPa), etc.
2. Power module
Including leakage short circuit, 1 voltmeter (0~250V), 1 ammeter (0~5A), 1 power socket, safety connection, etc.
3. Split *r conditioning control line module
Including *r conditioning control board, remote control receiving board, fault setting board, IO communication board, *r conditioning remote control, potentiometer, etc. and indicator lights, etc.
4. Heat pump household *r conditioning system
Including compressor, indoor heat exchanger, outdoor heat exchanger, four-way valve, filter, one-way valve, capillary, *r conditioning valve, sight glass, etc.
5. The equipment has two sets of refrigeration throttling systems: one set of electronic expansion valve, one set of control module and ordinary capillary throttling device, so that it is easy to interchange during the teaching process, learn the application of two throttling methods, understand the principles and practical use of two throttling systems.
6. Pressurization and vacuuming all-in-one machine:
The entire compressor is fixed on a work surface, which is both beautiful and convenient for students to operate. This device can also be used for pressurization and vacuuming of *r conditioning systems. Students can use the refrigerant in the *r conditioner to recycle and reuse it in *r conditioning tr*ning, which can save a lot of social tr*ning costs.
7. Refrigerant bottle recovery: The equipment is equipped with a 3L refrigerant quantity collection bottle.
8. 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 relay control, with the addition of PLC control function. After the connection is completed, enter the program writing interface through the PLC coding button, 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. Errors in components, line connections, and code will pop up prompt error boxes, and the scene can be reset at any time.
3. MCU control: The experiment is the same as relay control, with the addition of MCU control function. After the connection is completed, enter the programming interface through the C coding button, enter the correct C language code, and submit the verification successfully. Turn on the power to operate. Errors in components, line connections, and code will pop up prompt error boxes, and the scene can be reset at any time.
V. Project tr*ning content
1. Determine the distance between pipes
2. Cut pipes
3. Bending pipes
4. Expanding pipes
5. Expanding pipes
6. Installing pipes to the appropriate positions of corresponding components
7. Completing the pressure m*ntenance of the *r-conditioning system
8. Leak detection
9. Determining the windings of the *r-conditioning compressor
10. Completing the wiring and connection of the *r-conditioning system
11. Vacuuming
12. Electrical debugging
13. Adjustment of working conditions
14. Use of gas welding torches and welding ability
15. Assembly ability of *r-conditioning refrigeration system pipes
16. Pressure m*ntenance, leak detection and refrigerant charging ability of *r-conditioning refrigeration systems
17. Electrical connection and debugging ability of *r-conditioning control circuits
18. Electrical fault assessment, fault analysis and troubleshooting ability of *r-conditioning control circuits
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