DYLR-11A Refrigerator and Air Conditioner Assessment Experimental Platform

Release time：2024-06-19 10:00viewed：times

The ZRLR-11A refrigerator and *r conditioner tr*ning and assessment device 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", with competence as the basis and employment as the orientation, closely combined with production practice and the skill requirements of occupational positions, and in accordance with 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-oriented 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 tr*ning device is also suitable for technical schools, vocational tr*ning schools, vocational education centers, appr*sal stations/institutes, refrigeration majors, 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".
I. Features
1. The system integrates simulated *r conditioners and simulated refrigerators, and uses real refrigeration units to meet the requirements of actual teaching
. 2. The device is equipped with 2 systems, 1 *r conditioning system and 1 direct cooling/indirect cooling refrigerator integrated system, which can simultaneously meet the requirements of *r conditioning and refrigerator practical tr*ning and operation assessment
. 3. The whole set of practical tr*ning devices integrates the refrigeration system, electrical control system, and fault simulation system of *r conditioners and refrigerators. The system is real and complete, with clear and compact structure.
4. The practical tr*ning device intuitively displays the system structure and working principle of the heat pump split *r conditioner. The structure and m*n components of the refrigeration cycle system can be clearly seen. The system is also equipped with pointer-type AC voltmeter, pointer-type AC ammeter, digital display thermometer, vacuum pressure gauge, and signal lights to make the real-time working status of the entire heat pump split *r conditioning system and refrigerator system clear at a glance; in addition, a sight glass is set in the pipeline to observe the refrigerant status; the high-pressure pipeline is the red part, and the low-pressure pipeline is the blue part.
5. Fault settings can be simulated. Students analyze the possible causes of the fault according to the process, determine the scope of the fault, and troubleshoot. It is conducive to the development of skill appr*sal and assessment
work 2. Technical parameters
1. Input power: single-phase three-wire ~ 220V ± 10% 50Hz
2. Device capacity: <1.2kVA
3. Dimensions: 1000mm × 700mm × 1900mm
4. Refrigerant type: *r conditioner R22, refrigerator 600a
5. Safety protection: with leakage voltage and leakage current protection devices, safety meets national standards
3. Basic equipment of the device
This tr*ning device is m*nly composed of power control panel, tr*ning table, fault box, test box, etc.
(I) 1 Power supply, instrument control panel The
control panel is an aluminum alloy structure with an aluminum panel. It provides AC power, various test instruments and tr*ning devices for tr*ning. The specific functions are as follows:
a) AC power control unit: powered by single-phase three-wire 220V AC power supply, 2 AC voltmeters with a measuring range of 0-250V, used to monitor the grid voltage, 2 AC ammeters with a measuring range of 0-10A, used to observe the system startup 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.
b) Refrigeration system pressure detection unit: 4 vacuum pressure gauges are provided, with measuring ranges of -0.1-0.9MPa, -0.1-1.5MPa, and -0.1-3.5MPa, respectively, used to measure the high and low pressure side pressures of *r-conditioning and refrigerator systems.
c) Temperature detection unit: 2 three-and-a-half-digital temperature meters are provided, switched by band switches to display the temperature changes at different points.
d) 1 set of current type leakage protection device: when the ground leakage current exceeds a cert*n value, the circuit breaker will trip and cut off the power supply; a thermal protection device is provided to protect the compressor from overheating and overload.
(II) Tr*ning table
The tr*ning table is a double-layer matte dense-gr*ned spray-coated aluminum alloy structure, waterproof, wear-resistant high-density board, with a solid structure and beautiful shape; the desktop is used to install the power control panel and provide a spacious and comfortable work surface. The tr*ning table is also equipped with four universal wheels, which is easy to move and fix, and is conducive to the layout of the tr*ning room.
(III) Tr*ning
1. Fault
Provide multiple fault connection points for simulated *r conditioners and simulated refrigerators, and provide common electrical circuit connections for *r conditioners and refrigerators to simulate system faults; the setting types include: power circuit, temperature sensor circuit, drive circuit, compressor protection circuit, indoor fan speed control circuit, etc. The simulated fault switch quantity of the *r conditioner and the simulated fault switch quantity of the refrigerator meet the requirements of multi-point fault setting.
2. 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 tool model can be operated by the start/stop, forward motion, and reverse motion buttons. When the line is connected, the 3D machine tool 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 tool 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 tool 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. Fault Description
Heat pump split *r conditioner simulation fault setting description

serial number	Fault simulation instructions	Fault phenomenon
K1	Refrigerator power supply detection connection	The computer board does not have power and the whole machine does not work
K2	External fan circuit detection connection	The computer board does not have power and the whole machine does not work
K3	Air conditioning, compressor detection connection	The computer board does not have power and the whole machine does not work
K4	Four-way valve detection connection	There is no +5V DC power output, and the whole machine does not work
K5	Indoor fan high wind detection connection
K6	Indoor fan stroke detection connection
K7	Indoor fan low wind detection connection
K8	Indoor pipe temperature sensor short circuit
K9	f1 start capacitor open circuit	The motor cannot start and does not work
K10	f1 running winding open circuit	The motor cannot start and does not work
K11	Four-way valve YV coil open circuit	The four-way valve does not work and does not work in heating conditions
K12	Protection relay SAT open circuit	The compressor does not work
K13	Indoor temperature sensor short circuit	The compressor cannot work and the starting current is very high
K14	Compressor running winding CM open circuit	The compressor cannot work and the starting current is very high
K15	Quick Freeze Circuit Detection Connections
K16	Relay RLY5 coil working test	When simulating indoor speed regulation, high-speed wind speed does not work
K17	Relay RLY4 coil working test	When simulating indoor speed control, the mid-range wind speed does not work
K18	Relay RLY3 coil working test	When simulating indoor speed regulation, the lowest wind speed does not work
K19	Relay RLY2 coil open circuit	Four-way valve body does not move
K20	Relay RLY1 coil operation detection	The compressor is not working

Refrigeration tr*ning project
Basic skills tr*ning for junior technicians
1. Basic operation of refrigeration system special tools
2. Refrigeration system pipe welding
3. Refrigeration system leak detection
4. Vacuuming and refrigerant filling of refrigeration system
Intermediate skills tr*ning (design, installation, commissioning and m*ntenance)
1. Air conditioning system commissioning
2. Direct cooling refrigerator system commissioning
3. Indirect cooling refrigerator system commissioning
4. Refrigerator refrigeration system f*lure
5. Air conditioning refrigeration system f*lure
6. Refrigerator detection and fault analysis
7. Air conditioning detection and fault

Original URL: http://www.zrjysb.com/proshow.asp?ID=1050

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