DYLR-BX Refrigerator Maintenance Training Device
Release time：2024-06-18 08:30viewed：times
1. Product Overview:
The refrigerator device has an open design, is equipped with refrigeration pipeline equipment, and is equipped with various circuit schematic tr*ning boards. The electrical components required for the circuit are installed on the tr*ning board. Students can follow the circuit schematic diagram. According to the requirements, the wiring tr*ning of the refrigeration circuit, the analysis of the relevant indication data of the refrigeration circuit, the analysis of common faults of the refrigeration circuit, etc. We provide actual industrial appliances with electrical control circuits for composite (single-door direct cooling, double-door direct cooling, double-door intercooling) refrigerators , with intuitive images, good reliability, long service life, and the ability to connect the circuits by yourself, and Arbitrarily set the point of f*lure. It is suitable for practical tr*ning of basic refrigeration skills in technical colleges and vocational schools.
Two features:
1. The practical tr*ning device intuitively displays the system structure and working principle of the direct-cooling refrigerator. The structure and m*n components of the refrigeration cycle system can be clearly observed, which is convenient for teaching demonstrations and students' understanding of textbook knowledge. In addition, there is a sight glass in the pipeline to observe the status of the refrigerant; each section of the pipeline is color-coded to facilitate student identification, with high-pressure pipelines in red and low-pressure pipelines in blue.
2. The tr*ning cabinet integrates a direct cooling/frost-free refrigerator. The refrigerator system is real and complete, with a clear and compact structure, consistent with the actual refrigerator refrigeration system and electrical system. At the same time, it can meet the requirements for practical tr*ning of direct-cooling refrigerators.
3. The system uses real refrigeration units (compressor, fin coil evaporator, aluminum composite plate expansion evaporator, steel wire condenser, etc.). Integrate with actual devices.
4. The device is equipped with a direct-cooling/inter-cooling refrigerator electrical control circuit wiring area, which can complete different operating modes, which is conducive to students' application of theory to practice and cultivates students' practical ability.
5. Simulated faults can be set up. Students can analyze the possible causes of faults based on the process, determine the scope of the fault, and conduct troubleshooting. It is beneficial to carry out skill appr*sal and assessment work.
6. Manual throttle valve: A manual expansion valve is set up in the pipeline system. During the experiment, the flow opening in the refrigeration system can be simulated and the effect of refrigeration power can be observed.
6. The simulated *r-cooled defrost system is equipped with a set of simulated defrost circuits, which can simulate heating and is highly experimental.
7. It is equipped with a set of refrigeration tools at random, which can complete vacuuming, adding refrigerant, and processing in the refrigeration system. Ice blockage, poor cooling effect, etc.
3. M*n technical parameters:
1. Input power supply: AC220V±5% 50Hz
2. Device capacity: <0.2KVA
3. Ambient temperature: -5℃~40℃
4. Relative humidity: ≤ 90% (25℃)
5. Overall dimensions: 1200×600×1700mm
6. Refrigerant type: R600A
IV. Product composition
1. The direct cooling frost-free refrigerator refrigeration system
tr*ning platform provides 1/9 refrigerator refrigeration compressor QD60 (85W 0.65A R12), direct cooling evaporator (aluminum composite plate inflation evaporator and lower evaporator, wire type Condenser (17 gears), condenser fan lighting and door switch bimetallic thermal protection relay, PTC starter, weight starter, capillary tube.
2. Instrument
(1) 1 AC voltmeter: measuring range 0~250V. The accuracy is 1.5, used to monitor the power supply voltage.
(2) 1 AC ammeter: measuring range 0~3A, accuracy 1.5, used to observe the system starting current and normal operating current.
(3) 4 thermometers: using PT100 sensors. , three-and-a-half-digit display, which can measure the freezer temperature, refrigerator temperature, condenser inlet and outlet temperature respectively
(4) 2 vacuum pressure gauges: measuring range is -0.1~0.9MPa, -0.1~1.5MPa, can be displayed. The pressure on the low-pressure side and the high-pressure side of the system.
3. Simulated refrigeration box: divided into two parts: refrigeration and freezing. The insulation effect is significant, and the temperature can be automatically controlled, eliminating the trouble of the teaching machine not being able to shut down.
4. Aluminum profile tr*ning table. Cover: 1200×600×1700mm, the panel is made of iron color printing, and the table is made of aluminum.
5. Microcontroller , PLC programmable design and control virtual simulation software:
This software is developed based on unity3d, with built-in experimental steps and experimental instructions. , circuit diagram, component list, connection line, power on, circuit diagram, scene reset, return and other buttons. After the connection and code are correct, you can operate the 3D machine tool model movement through the start/stop, forward movement, and reverse movement buttons. , while the circuit is connected, the three-dimensional machine tool model can be zoomed in/out, and panned.
1. Relay control: Read the experiment instructions, enter the experiment, and select relays, thermal relays, switches and other elements in the component list by reading the circuit diagram. The components are arranged into the electrical cabinet by dragging and dropping. The limiter is placed on the three-dimensional machine tool model. You can choose to cover it. Some component names can be renamed. Then click the connect line button to connect the terminals to the terminals. After the machine tool circuit is successfully connected, choose to turn on the power and proceed. If the component or line connection is incorrect, an error box will pop up. You can reset the scene at any time.
2. PLC control: The experiment is the same as relay control, with the addition of PLC control function. After the line is completed, enter the program writing interface through the PLC coding button, and write two programs, forward and reverse, with a total of 12 ladder symbols. After the writing is completed, select submit for program verification. After the verification is successful, turn on the power for operation. , an error box will pop up for component, line connection, and code errors, and the scene can be reset at any time.
3. Microcontroller control: The experiment is the same as relay control, with the addition of microcontroller control function. After the connection is completed, enter the programming interface through the C coding button. Enter the correct C language code, and after successful submission and verification, turn on the power and proceed. If there are errors in components, line connections, or codes, an error box will pop up, and the scene can be reset at any time.
5. Practical tr*ning content
1 Basic skills tr*ning for junior technicians
(1) Operation of special tools
(2) Welding of refrigeration system pipe fittings
(3) Pressure test and leak detection of refrigeration system
(4) Vacuuming and charging of refrigerant in refrigeration system
2 Intermediate skills tr*ning (design, installation, debugging and m*ntenance)
(1) Understanding and measuring refrigerator electrical circuit components
(2) Direct-cooling refrigerator electrical control circuit wiring and system operation
(3) Direct-cooling refrigerator m*ntenance tr*ning and fault analysis
3 Refrigerator troubleshooting
(1) Compound The common terminal of the door switch is open
(2) The door switch is open
(3) The thermostat is open
(4) The protection relay is open
(5) The system is dirty and blocked
(6) The system is blocked by ice
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