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Refrigeration and heating comprehensive training assessment device (fifth and sixth generation)

The sixth-generation refrigeration and heating laboratory equipment has undergone hardware transformation on the basis of the original configuration. It has added temperature patrol detection and digital display functions for key points, making the overall equipment more beautiful and practical in appearance, more compact and reasonable structure, and experiments. The overall view of the room is more open. It is also newly equipped with powerful multimedia presentation software. The refrigerant flow, the compressor's working process, the query of related information, and the mutual conversion of cooling and heating can be realized very realistically and visually through this software. Coupled with multimedia auxiliary facilities such as a projector, it will play a considerable role in teaching results. ( Teaching Equipment | Teaching Instruments )
制冷制热综合实训考核装置
I. Notable Features:
1. The complete set of equipment is more realistic and full-function remote control.
2. Multi-point temperature collection, patrol detection, and digital display.
3. The overall design is reasonable and compact, which makes the field of vision of the laboratory wider.
4. The combination of software and hardware can increase experimental items.
5, with pure software simulation to simulate the entire process of cooling and heating.
6. It has the function of temperature inspection and digital display, that is, the temperature inspector can detect the working temperature of each key part of the cooling and heating experiment equipment and provide experimental data.
7. It has a pressure detection function, which detects the high pressure and low pressure of air conditioners and refrigerators for experimental analysis and failure judgment.
8. With current and voltage detection function, display the voltage and current when the equipment is working and observe whether the machine is working normally.
9. Pure software simulates the whole process of cooling and heating.
10, with computer board failure demonstration function (common faults and troubleshooting methods of the demo computer board, please refer to the instruction manual and teaching demonstration software)
11. Use colored lights to demonstrate the working principle of split air conditioners, inverter air conditioners, and refrigerators.
12. Use demonstration software to demonstrate the entire working process of refrigerator refrigeration and air conditioner cooling and heating.
13. Demonstration software provides a variety of circuit principle demonstrations of refrigerators and air conditioners to enrich students' thinking.
14. Anatomize the air conditioner, refrigerator, and all-round, and also ensure that experiments such as cooling and heating, mode operation, and refrigerator cooling operation of the air conditioner are performed separately, so that students can master the operation principle, use method, and cause of failure of the refrigerator and air conditioner. And exclusion methods.
15. The air conditioner can be turned on and off automatically in the remote control mode.
16. It has two remote control and manual control demonstration functions. The cooling and heating of the air conditioner can be controlled by remote control, and it can also be controlled by manual machinery.
Second, the temperature survey system features:
The temperature patrol detection system can separately detect the temperature value of each key point of the refrigerator and the split air conditioner.

A. The key points that can be detected are:
1.Normal ambient temperature
2. Air-conditioning compressor exhaust pipe
3. Air-conditioning compressor return pipe
4, air conditioning condenser exhaust
5. Air outlet of air conditioner evaporator
6. Refrigerator compressor
7. Refrigerator condenser
8. Refrigerator evaporator
B. Basic operations:
After the cooling and heating system starts to work, press the button below the green indicator light at the bottom left of the "Temperature patrol" unit to make the green indicator light turn on and the temperature patrol measurement system starts. At this time, the temperature of each key point can be measured.
This system has an automatic reset function. When the detection is completed, after a delay of a few seconds, the system will automatically reset.
3. New experimental items for common failures of split air-conditioning circuits:
<I>. The whole machine is not working or is not working properly. The following faults can be demonstrated:
1, the microprocessor is damaged, the fault code Q should be replaced
2. Bad crystal, fault code I
3. CPU working + 5V power loss, fault code G
4. The rectifier diode is damaged and cannot work normally. Fault code F
5. The three-terminal voltage regulator 7812 is not good and cannot work normally. Fault code V
6. CPU reset is bad, air conditioner cannot work, fault code H
<II>. The indoor fan is working, but the main unit is not working. The fault can be eliminated by the following methods.
1. If the compressor cannot work normally, under normal circumstances: the capacitor overload protector is open, and the capacitor overload protector can be replaced.
2. If the control instruction is wrong, fault code K
3. If 12V power is lost, fault code V
<三> The whole machine works normally and the remote control fails, which can be demonstrated by the following methods
1. If the remote control is damaged, fault code U
2. Receiving head is bad, fault code P


3. Bad CPU, fault code P
<四>. The whole machine works and the remote control is normal, but there is no beep. You can use the following methods to demonstrate
1. Buzzer is broken, fault code W
2, 2003 integration is broken, fault code X
<Five>. The whole machine works, the damper does not move, and the fault code is Y
<Six>, matters needing attention
1. The above fault demonstrations can only be performed one by one. After the demonstration, the switch should be reset and the fault indicator light goes out. Before proceeding to the next failure demonstration.
2. Normal state, all demonstration switches are backward (downward)
3. The host is turned on and off, and the time interval is about 5 minutes. The compressor is easily damaged due to continuous startup.
4. The microprocessor sets the delay protection function for 3 minutes.
5. Refrigeration conversion heating needs to be stopped for more than 3 minutes.

Four, refrigerator fault setting method number fault name fault setting method
1 Fluorine leaks fluorine from stop valve I gas inlet
2 Capillary blocked shut-off valve II, fully closed means fully blocked, half closed means half blocked
3 Too much fluorine Add fluorine to the 1.25 times the current from the filling port of the stop valve I
4 Compressor suction port is blocked Replace with a bad overload protector
5 Compressor startup capacitor failure Replace with good or bad capacitor for good
6 Non-stop fault code C
7 Non-stop fault code D
8 Light does not turn on Error code E

Five, air conditioner fault setting method number fault name fault setting method
1 Fluorine leaks fluorine from stop valve I gas inlet
2 Capillary blocked shut-off valve II, fully closed means fully blocked, half closed means half blocked
3 Too much fluorine Add fluorine to the 1.25 times the current from the filling port of the stop valve I
4 Compressor suction port is blocked. Shut-off valve I is fully closed.
5 Dirty condenser plugged with a glass plate to seal the air inlet surface of the condenser
6 Dirty blockage of the evaporator Seal the evaporator air inlet surface with a glass plate
7 Compressor overload protector fault code K
8 Compressor starting capacitor fault code M
9 No heating fault code L
10 Outdoor fan does not turn on fault code O
11 Indoor fan does not turn on fault code N
12 Temperature control failure fault code S
13 Remote receiving head damaged fault code P
14 Rectified power circuit fault fault code F
15 Refrigeration system failure Remove the temperature sensor at the coil
16 Damper non-operation fault code Y
17 Temperature control probe damaged fault code R
18 + 5V power failure fault code G
19 + 12V power failure fault code V
20 Remote control damaged fault code U

6. Main technical parameters of refrigeration and heating laboratory equipment:
1. Working power: AC220V 50Hz
2. The maximum remote control distance is 8m and the angle is 90 degrees.
3. Noise: 37-44dB for internal unit and 55-65dB for external unit.
4. Power consumption of the whole machine: air conditioner cooling—600W air conditioner heating—750W refrigerator—75W
5. Compressor power: air conditioner—1PH refrigerator—1 / 10PH
6. Refrigerant Type: Air Conditioner—R22 Refrigerator—R12
7. Dimensions: 160cmX80cmX117cm
8. Ambient temperature: -5 ℃ -40 ℃
9. Relative humidity: 85% (25 ° C)


制冷制热实验室设备

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