Quality and reliability are major concerns by jiaYi engineers even at the very beginning of design stage of the products. The cooling material has two shielding layers for guarding against the diffusion of harmful elements. The module is to pass through twice  moisture protection treatment to assure no moisture entering, so as to prevent the retrogression of the module’s performance. It has more than ten quality controlpoints in the module pro-duction process, additionally with the strict test and selection, which guarantee the quality and reliability of products.
 
A test by the National Special Test Center shows that Huayu TEC,S lifetime has reached 200 thousand hours. The TEC has passed the severe test of alternation the Cooling and heating process within very short time. The method is to put the module on a test –bed and subject it to electric current for 6 seconds and after another 18 seconds, a new cycle is beginning. During the test, the curent is adjusted make the hot side temperature reach 125℃ at the end of every 6 seconds. The change between heating and cooling repeats 900 times and the total tesing time is 12 hours.

The high-temperature TEC produced with the high-emperature soldering flux by Huayu Company can operate for long-time at 150℃,200℃ and 250℃, The conductor tab and alumina ceramic plate in the module are sintered together, so as to assure the stability of products.

Thermoelectric cooling module (TEC) accomplishes the cooling action according to the Peltier effect theory and utilizes the thermoelectric effect of semiconductor material. Reversing is current direction can change the heat flow direction of TEC, and its cooling power can be adjusted by changing its operating current.

TEC is a kind of solid-state thermal energy pump, because of its light weight, small size and fast reaction, it is very suitable to be used in the cooling devices which are limited by space. Because of its low noise, shatter proof, shock resistance, long life and easy maintenance, it can also be used in the other special fields.