Testing apparatus and testing method for refrigerator circuit boards

Abstract

The invention relates to a testing apparatus and a testing method for circuit boards. The testing apparatus comprises a power source, multiple sets of circuit boards to be tested, a power supply load balance controller, multiple sets of analogue compressors and heaters, a signal generator, multiple groups of 2-of-8 channel switching circuits, a 50-DEG C temperature box and a constant temperature controller, wherein the multiple sets of analogue compressors and heaters serve as testing loads, the signal generator is used for providing analogue temperature sensing for refrigeration, freezing and defrosting for the circuit boards, the multiple groups of 2-of-8 channel switching circuits serve as the analogue compressors and the heaters, the circuit boards to be tested are placed in the 50-DEG C temperature box, and the signal generator, the circuit board and the 2-of-8 channel switching circuits are sequentially connected. The testing apparatus has the advantages that a simulation refrigerator circuit board temperature control manner is adopted, when the circuit boards are used for inputting temperature states in a time sharing and grouping manner, the driving of the loading compressor and heater group is synchronous with the input; and the time-sharing driving ensures that the testing loads are shared, the number of the testing loads is reduced by one fourth, the testing loads become heat supply sources of the 50-DEG C temperature box and replace a special heating power supply for the temperature box, and the electricity for testing is saved by two-thirds.

Description

technical field [0001] The invention belongs to the technical field of refrigerators, and in particular relates to a test device and a test method for a circuit board of a refrigerator. Background technique [0002] The circuit board is installed in the bubble layer or sealed environment of the refrigerator, and the self-heating components of the circuit board make the working environment temperature of the circuit board about 50°C; therefore, it is necessary to conduct a full-load reliability test on the circuit board in a 50°C environment. In the existing circuit board conventional test technology, there are some problems as follows: [0003] 1. The original circuit board uses the traditional test method of programming timing to switch the output load to assess its life. When using the refrigerator, the circuit board determines whether to drive the load compressor or the output condition of the heater according to the input temperature difference signal of the refrigerator...

AI Technical Summary

Problems solved by technology

[0004] 2. Conventional test, 1 set of test circuit board is equipped with 1 set of test load, large-scale circuit board test, 1 to 1 load quantity needs to occupy a large area of ​​the test site, and a large amount of heat radiation is associated

[0007] To sum up: both the routine test method and the heat source matching of the temperature box have large factors that can be improved

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