一、Product Overview

At present, variable frequency air conditioning has become one of the development directions for household air conditioning due to its energy-saving, low impact on the power grid, and good regulation performance. At the same time, the application of frequency conversion technology in the field of air conditioning has become one of the knowledge points that refrigeration professionals must master. This variable frequency air conditioning experimental device is designed for the experiment of refrigeration courses in universities and vocational schools. It adopts PWM and VVVF control methods, and the circuit and pipeline parts in the system adopt an open design. The design is scientific and advanced, and the structure is reasonable. It is equipped with more than 20 system and circuit detection and faults for students to analyze and manually eliminate faults, and conduct design and open experiments.

二、Technical Parameter

1)Environmental temperature: -5 ℃~40 ℃；

2)Relative humidity: ≤ 90% (25 ℃)；

3)Input voltage: AC220V ± 5% (50Hz)；

4)Maximum current: 10A；

5)Equipment weight: 130kg；

6)Refrigeration heating capacity: 530K for refrigeration and 600K for heating；

7)Safety protection: Leakage protection (leakage action current ≤ 30mA, action time ≤ 0.1s)；

8)Refrigerant: F22；

9)Boundary dimension: 1600 × 700× 760mm。

三、Practical training projects

1.Module protection;

2.Compressor top temperature protection;

3.Open circuit of outdoor temperature sensor;

4.Short circuit of outdoor temperature sensor;

5.The temperature outside the refrigeration room is too low;

6.The temperature outside the refrigeration room is too high;

7.Open circuit of indoor temperature sensor;

8.Short circuit of indoor temperature sensor;

9.Open circuit of the condenser internal coil;

10.Swing motor open circuit;

11.Indoor unit control board power transformer secondary open circuit;

12.Fan speed out of control;

13.Power fuse open circuit protection

14.Communication protection between indoor and outdoor units;

15.Open circuit of environmental temperature sensor;

16.Short circuit of environmental temperature sensor;

17.Short circuit of coil temperature sensor;

18.Open circuit of coil temperature sensor;

19.Stabilized voltage of 5V open circuit;

20.Four way valve line.