DYLR-FZK Desktop Simulation Central Air Conditioning Training Platform
Release time：2024-06-17 01:00viewed：times
1. Equipment overview: Central *r conditioning has entered ordinary people's homes, and more and more people choose to live, work, entert*n, and shop in a central *r conditioning environment; with the development of the economy and the improvement of people's living standards; equipped with central *r conditioning Buildings are springing up in every corner of urban and rural areas; ensuring the normal operation of central *r-conditioning to provide users with a healthy, comfortable, safe and civilized indoor environment; in view of the current relative shortage of talents and the generally low quality of *r-conditioning operation, society There is an urgent need for a large number of skilled and high-quality talents in the industry; in order to solve the problem of lack of central *r-conditioning teaching experimental equipment in major and technical secondary schools to cultivate talents, our company has invested heavily and successfully developed the latest practical teaching equipment by professional engineers. Central *r conditioning experimental equipment.
Equipment introduction, salient features of
central *r-conditioning laboratory
equipment: 1. Using fully transparent materials, the mold is formed in one go, which is highly intuitive and helpful for teaching.
2. The overall design is reasonable, the appearance is beautiful, the simulation is small, and the size is small.
3. Both the refrigeration system and the heating system are equipped with multi-level protection measures to ensure safe and reliable operation of the equipment.
4. The refrigeration system uses all copper materials, which has good efficiency and long service life.
5. It has comprehensive functions, both cooling and heating, and has a simulation demonstration system and all fault settings.
6. It has a microcomputer communication interface to facilitate remote control of the working status of experimental equipment and collection of multiple related data.
Features and working principles of each m*n component:
1. Compressor: The system uses a fully enclosed piston compressor with a normal operating temperature of only 0°C. It is safe and reliable, has a compact structure, low noise, and good sealing. The refrigerant is R22.
2. Evaporator: The refrigeration system uses a transparent water tank evaporator, which is easy to observe and clear at a glance. The evaporator group is immersed in water, the preparation evaporates in the tube, and the water flows in the water tank under the action of the water pump to enhance the refrigeration effect.
3. Condenser: The refrigeration system uses a spiral tube condenser, which is a newer type of heat exchange equipment. It is made of two parallel copper coils and is a spiral body with two spiral channels. The middle spiral body is the cooling water channel, and the outer spiral body is the high-pressure refrigerant channel.
4. Spray cooling tower: The condensation method of this equipment adopts a counter-flow cooling tower. The mold is formed at one time and has a fully transparent structure. The suction fan is installed on the top of the tower. The structure is completely simulated and intuitive; the cooling tower adopts suction forced ventilation. The tower is filled with fillers to improve the cooling effect; after the warm water from the condenser is sent to the top of the tower by the cooling water pump, it is sprayed downward by the nozzle of the water distributor.
5. Boiler: The boiler is the core component of the central *r-conditioning heating system. It uses Yingl* electric heating pipes to completely isolate water and electricity. It has over-temperature protection, anti-dry boil protection, and over-pressure protection to ensure human and machine safety; it uses imported polyethylene. Ammonia foam insulation technology has good thermal insulation performance.
6. Simulation room: The simulation room is made of fully transparent plexiglass, with beautiful appearance, small footprint, compact structure, fully transparent structure, and clear at a glance; the room is equipped with coils, coil fans, and temperature control regulators.
7. Temperature control: The panel of the experimental bench of this equipment is equipped with a temperature control display, which can control the temperature range and continuously detect the temperature of key parts.
8. Simulation demonstration: The equipment is equipped with a 500mmx300mm system work demonstration board, which uses epoxy copper-clad plate, four colors (red, green, blue, yellow) and LED image to realistically display the temperature and working status of the cold and hot pipes.
9. Temperature control detector: The two simulated rooms are equipped with digital display temperature control regulators respectively. The temperature range can be set by yourself: the instrument can automatically adjust the temperature according to the specific conditions of the room temperature setting to reach the set value.
10. High and low voltage protection devices: For safety reasons, the refrigeration system is equipped with high and low voltage protection relays to protect the normal operation of the compressor and system.
11. Water tank: In order to save water and recycle the water resources of the system; the water adding tank is used to complete tasks such as adding medium water, automatic adjustment, and filtration; and is equipped with an automatic water adding system. If the system is short of water resources, the water adding system will automatically start replenishment. .
12. Central control part: The overall control part of the experimental bench can complete tasks such as switching between cooling and heating of the equipment, and shutting down the cooling or heating state. The starting methods are all micro-movement methods, using weak switching signals to control the microprocessor and drive the circuit to work, thus extending the service life of the equipment.
13. Characteristics of the microcomputer interface and control part: There are two ways to control the whole machine and display parameters of the central *r-conditioning teaching experiment system. The first way is to control the working status of each part and perform various tasks through the buttons on the control panel of the experimental bench. Parameter setting and dynamic display. The second way is to communicate with the serial interface of the microcomputer through the serial port of the microcontroller (the m*nboard of this experimental system uses today's advanced microcontroller as the m*n chip). It is also equipped with full Chinese application software, so that the central *r conditioner needs All controls and parameters that need to be displayed can be completed on the computer screen.
14. MCU and PLC programmable design and control virtual simulation software:
This software is developed based on unity3d and has 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 moved through the start/stop, forward movement, and reverse movement buttons . In the connected line state, the 3D machine tool model can be enlarged/reduced and translated.
1. Relay control: Read the experiment instructions and enter the experiment. By reading the circuit diagram, select the relays, thermal relays, switches and other components in the component list and drag and drop them into the electrical cabinet. The limiters are placed in the three-dimensional On the machine tool model, you can choose to cover it, and some component names can be renamed. Then click the Connect Line button to connect terminals to terminals. After successfully connecting the machine tool circuit, choose to turn on the power and proceed. If the component or line An error box will pop up if there is a connection error, and the scene can be reset at any time.
2.plcControl: 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, 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. Error boxes will pop up for component, line connection, and code errors, and the scene can be reset at any time.
3. Single-chip microcomputer control: The experiment is the same as relay control, with the addition of single-chip microcomputer 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 for operation, components, lines If there are connection or code errors, an error box will pop up, and the scene can be reset at any time.
The functions of the equipped software are as follows:
(1) Dynamic display of the temperature of each key point, including:
A. Current heating value B, current cooling value C, boiler inlet D, boiler outlet E, cooling tower inlet F, cooling tower outlet
G, Condenser inlet H, condenser outlet I, evaporator inlet J, evaporator outlet K, simulation room IL, simulation room II
(2) Temperature setting and display temperature setting can be selected between 0 and 99 degrees Celsius. .
(3) Compressor delay setting The compressor start-up delay can be set arbitrarily between 1-30 minutes.
(4) Switch control and instructions The work and stop of each part of the central *r conditioner can be controlled through the switches set on the microcomputer screen, and there is a switch display to facilitate remote operation. The set switches are as follows:
A. Cooling water pump B. Cooling fan C , refrigeration water pump D, compressor E, solenoid valve I
F, solenoid valve II G, heating water pump H, refrigeration I, heating J, shutdown
(5) Communication status display is equipped with communication status and interface display between the experimental system and the microcomputer. .
(6) Communication port selection The communication port between the experimental system and the microcomputer has two optional serial ports, namely COM1 port and COM2 port.
(7) Features of the software provided with the microcomputer: The software has a full Chinese menu, and the operation is very convenient and intuitive. You can control various switches and set various parameters with just a click of the mouse. You can set and operate some functions without reading the instructions. All the above functions realized through microcomputer software can also be realized through the device of the experimental bench control panel.
3. M*n technical parameters: Working power supply
: single-phase three-wire 220V±5% Rated frequency: 50Hz Dimensions: 2400mm
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