The refrigeration trainer can carry out practical operation on the electrical control circuit listed in the textbooks of "primary maintenance of electric refrigeration technology" and "intermediate maintenance of electrical technology", which improves the following skills of students after operation training:
(1) Familiar with the structure, principle, installation and use of common low voltage apparatus;
(2) Understand the use of graphic symbols and text symbols in circuit diagrams, and be able to arrange them according to the actual objects,
(3) Master the professional knowledge learned from books and complete the detection and debugging of the circuit independently.