Note the problems in the use of TEC1 series cooling components

1, when using non-special equipment to test the device, under the working parameters, the temperature of the hot end must be lower than 80℃, (including changing the direction of the current cold end into the hot end). Under the condition that there is no heat dissipation at the hot end, the test is carried out instantly with power, that is, the two end faces of the refrigerator are touched by the hand, and there is a certain heat sensation, and one side is slightly cold. Otherwise, due to the high temperature of the hot end, it is easy to cause short circuit or disconnection of the device and scrap the refrigerator.

2, under general conditions, when identifying the polarity of the cooling component, the cold end of the cooling component can be placed upward, and the lead end is toward the human body, at this time the right lead is the positive electrode usually expressed in red: the left is the negative electrode usually expressed in black, blue or white, this polarity is the wiring method when the cooling component works. When heat is needed. Just change the polarity of the current. Dc power supply must be used for cooling working days, and the ripple coefficient of the power supply should be less than 10%.

3, the identification method of the cooling logarithm and the limit voltage, the logarithm refers to the number of PN nodes. For example, the model of the refrigerator is TECI - 12703, then 127 is the logarithm of the refrigerating component, 0.3 is the allowable current value (unit ampere), and the limiting voltage of the refrigerating component is ≈ logarithm of the electric couple ×0.11, for example: TECI 12703 limit voltage V = 127×0.11 = 13.97(V)4, various cooling components, whether in use or in the test, the cold and heat exchange must be restored to room temperature, (generally take more than 15 minutes to carry out). Otherwise, it is easy to cause the ceramic sheet to burst.

5, in order to improve the life of the cooling component, the cooling component should be cured around the exposed PN element before use. Methods A single set of 706 cured rubber was evenly applied to the PN elements around the cooling assembly, not to the two end faces. The coated rubber cures naturally for 24 hours and is a milky white elastic solid after curing. The purpose of curing is to completely isolate the cooling component couples from the outside air. It plays the role of moisture-proof and can increase the life of the cooling component by about 50%.

6, in the installation, first with anhydrous alcohol cotton, the two ends of the cooling component scrub clean. Evenly coated with a very thin layer of thermal grease: the installation surface (cold storage plate, cooling plate) should be processed, the surface flatness is not more than 0.03mm, and clean; During the installation process, the cold end working face of the cooling component must be in good contact with the cold storage plate, and the hot end should be in good contact with the heat dissipation plate (such as tightening with screws, the force should be uniform, do not excessive) : the size of the cold storage plate and the heat dissipation plate depends on the cooling method and the cooling power size, which can be seen: the situation is determined by itself; In order to achieve the best cooling effect, the insulation material should be filled between the cold storage plate and the heat dissipation plate with a thickness of 25 to 30mm.

7, the user in the absence of special instruments, according to the manufacturer's instructions, measure its appearance size and height, judge its performance. Measuring the static resistance of the cooling component with a multimeter is not accurate and is for reference only.