TEC1-12702 40*40mm Thermoelectric Cooler Peltier

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Thermoelectric Cooler Peltier TEC1-12702  40*40mm  FOR HOT SALE high-quality  

Semiconductor chip cooling parameters:

Model: TEC1-12702

Rated voltage: 12v

Rated current: 2A

Cooling capacity: 17.78W

Maximum temperature: 65 °C

Dimensions: 40 * 40 * (3.8-3.9) mm

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Introduce the principle of refrigeration tablets:

Thermoelectric cooling thermoelectric effect is the Peltier effect is mainly used in refrigeration technology. Practical thermoelectric cooling device is a thermoelectric effect more significant, more efficient thermoelectric cooling semiconductor thermocouple composition.

Semiconductor thermocouple by the N -type semiconductor and P -type semiconductor components. N-type material has excess electrons have a negative thermoelectric power . P-type material electron deficiency , there are thermoelectric power ; When electrons pass through the junction from the P -type to N -type , its energy will increase, and the increase in energy corresponds to the energy consumed by the node . This can be used to justify lowering the temperature difference .

At the cold end of the thermopile , the following is the hot end . With a variety of heat exchanger means , so that the thermopile

In contrast, when electrons flow from the N-type to P -type material , the junction temperature will rise. Thermocouple circuit in direct contact with the actual references are not available , so the connection method instead of on the map , experiments show that the introduction of a third material ( copper sheet and wire connection ) will not change in the temperature difference between the circuit characteristics of the circuit .

Thus , the semiconductor device can meet the various requirements of users connected to the method . A P -type semiconductor and the N -type semiconductor junction to a thermocouple, connected to the DC power is generated at the joint and heat transfer temperature difference in the joints , the current direction at the N to P, the temperature drop and endothermic , which is the cold side . In the following a joint , to the current direction is P N, and the exothermic temperature rise , and therefore the hot end .

According to the figure on the number of semiconductor thermocouples connected in series to the circuit together , and in terms of the heat transfer in parallel , which constitutes a common cooling thermopile . Illustrated by the DC power supply is connected , the end of the continuous heat and cooling to maintain a certain temperature of the thermopile cold end into the working environment to the endothermic cooling, which is the working principle of thermoelectric cooling .


Refrigeration piece Precautions:

1 , do not know when the cold surface of the refrigerator , we can use this method, the positive power supply red and black wire to negative , and in the absence of cooling conditions, the instantaneous power test , the cooling touch two end devices , and will feel the heat on one side , one side slightly cold sensation, heat one side of the hot side and cold side is feeling cold . But time is not more than 5 seconds , otherwise due to the hot end of the temperature is too high , can easily cause the device to burn out .

2 , under normal conditions, the red lead is usually expressed as positive : usually in black is negative , which is wiring thermoelectric cooler at work. To take the heat . As long as the current polarity can be changed . Refrigeration work must be using switching power supply, power supply ripple factor should be less than 10%.

3 , the number of identification methods and limit voltage , thermocouple refers to the number of P, the number of nodes N thermocouples cooler . For example: refrigerator models for TEC1-12706, the 127 is cooler on the number of thermocouples , 06 to allow current value : A, cooler ≈ thermocouple voltage limit on the number of × 0.12, for example : TECI- 12706 limit voltage V = 127 × 0.12 = 15.4 (V). 78% of normal operating pressure of the threshold voltage , such as TEC1-12706 operating voltage of 15.4 * 0.78 = 12.01V.

4 , the use of various refrigerating or whether the test , the temperature of the refrigerant caused by such cold heat exchange surface should be brought to room temperature ( usually 15 minutes or more ) . It will cause damage to the refrigerator .

5 , in order to prolong the life of thermoelectric cooler , refrigeration components four weeks to respond to seal deal . Our method has two kinds , one is using 704 silicone seals ; another one is mining epoxy seal, seal is designed to make cooler thermocouple completely isolated from the outside air . Plays a role in moisture proof , and can extend the life of the refrigerator .

6 , during the installation , first refrigeration components on both sides Wipe clean and evenly coated with a thin layer of thermal grease in the refrigerator were hot and cold surfaces . Aluminum radiator cold storage or surface contact with the cooler should be leveled and wipe clean, and also the surface evenly coated with thermal grease ; cooler in the installation process and must be stored cold good contact with cold , hot surfaces should be fully in contact with the surface of the aluminum radiator ( such as with screws , a few screws should be a uniform force , not excessive force , or uneven ) . To achieve the best cooling effect between cold storage applications and the aluminum heat sink material filling , the thickness is generally 25-30mm is appropriate.

7 , install the recommended pressure refrigeration piece between 150PSI to 300PSI, the pressure is too low will cause poor contact chip cooling contact surfaces , too much pressure can damage the chip cooling .

8 users in the absence of a dedicated instrument cases, cooler or not qualified to judge , mainly to test its resistance. You can use the data bridge or ohmmeter , measure the resistance of the refrigerator with compensation . Static cooling components with a multimeter to test the resistance is not accurate, just for reference.

9, in the handling and installation process of the refrigerator , the operator should be gently strictly prohibited refrigeration piece fell from a height , even at 10-20cm height will cause the refrigerator produce significant internal resistance changes , resulting in damage to the chiller .

10 , the semiconductor chip cooling used in the following situations , a significant reduction of its life will be possible : A, frequent use of alternating hot and cold use B, using C under vibration , hot side heat sink temperature exceeds 65 degrees D, the working voltage of excess pressure ( no more than 70% of the recommended limit voltage ) heating surface E, refrigeration piece of bad F, surrounded by pieces without refrigeration sealant for use in wet environments

11 , the semiconductor chip cooling for use in the following cases , there will be the possibility of damage quickly : A, heating surface chip cooling is not in contact with any heat objects B, refrigeration piece using voltage exceeds the limit operating voltage C, cooling sheets under pressure over 500PSI

Thermoelectric cooler and refrigeration compressors because it has different strengths so its products are widely used in various civil, scientific research and other aspects of small refrigeration applications.

Optical areas:
Temperature control of laser devices
Temperature control of high-sensitivity CCD
SHG laser, DWDM, optical tube, high output LD
Tiny small chip cooling
If 7,17,31,49,71 for series
Projectors, photocopiers 127 pairs series chip cooling

Civilian areas
Car refrigerators, dehumidifiers, small beverage machine 127 pairs 40 * 40mm Series
Car with cold cups, hot and cold massage, cold cap, car seats 71,127 for 30 * 30mm Series
Cosmetic storage box, refrigerator, wine cooler 71,127 for 30 * 30mm Series

Medical field
DNA amplification, biological agents detection device
Pharmacy cold freezer, heated bed
Ice caps, and a variety of high-precision medical instruments
127 pairs of series chip cooling

Computer field
Semiconductor refrigeration chassis 127 pairs 40 * 40mm Series
71,127 chips on the motherboard Northbridge cooler 30 * 30mm Series
CPU test platform above 200W High Power Series

Cold device
Circulation, cooling plate
Semiconductor Test thermostat platform
127 pairs of series chip cooling

Chromatography machine 127 pairs series chip cooling

Note: Be sure to install the heat sink thermal grease paint.

0.0121 s.