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A high-voltage intensive thermoelectric refrigerator and its preparation method

A technology of thermoelectric refrigeration and thermoelectricity, which is applied to the operation mode of machines, machines using electric/magnetic effects, refrigerators, etc., can solve the problems of high power and unsuitability, and achieve improved stability and increased weldability Sexuality and the effect of improving cutting accuracy

Active Publication Date: 2020-09-15
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current of this type of device is usually ≥ 2A when it works, so it requires a lot of power. It is only suitable for ground commercial use or ground military use where there is no power consumption problem, especially not suitable for space applications that have strict power requirements.

Method used

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  • A high-voltage intensive thermoelectric refrigerator and its preparation method
  • A high-voltage intensive thermoelectric refrigerator and its preparation method
  • A high-voltage intensive thermoelectric refrigerator and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0074] A high-voltage intensive thermoelectric refrigerator is characterized in that: the high-voltage intensive thermoelectric refrigerator consists of a gold-plated ceramic plate on the cold surface, a gold-plated ceramic plate on the hot surface, an N-type thermoelectric element, a P-type thermoelectric element, and The lead wire is composed of N-type thermoelectric element and P-type thermoelectric element in the middle, and gold-plated ceramic plates on both sides. The 3μm nickel layer is used as a welding transition layer and a heavy metal impurity barrier to protect the thermoelectric material from damage; the number of pairs of thermoelectric elements reaches 337 pairs, the effective area is 33mm*34mm, and the unit density is 0.2915 pairs / mm 2 , more than 0.1411 pairs / mm of conventional refrigerator 2 More than double the density; the pitch of thermoelectric elements is 0.5mm, which belongs to high-density thermoelectric components, which is much smaller than the pitch...

Embodiment 2

[0078] Refer to attached figure 1 with figure 2 .

[0079] A high-voltage intensive thermoelectric refrigerator is composed of gold-plated ceramic plates on the cold and hot surfaces, N and P-type thermoelectric elements, and solder through a welding process. It has a "sandwich" structure, that is, the thermoelectric element in the middle, and the two sides For gold-plated ceramic plates. The refrigerator with this structure has a low center of gravity and a flat structure, which is suitable for harsh mechanical environments. The base material of the gold-plated ceramic plate on the cold and hot surfaces is a ceramic sheet, which can be a 100% aluminum nitride ceramic substrate. The thickness of the aluminum and beryllium oxide ceramic substrate is 0.5mm; the surface of the ceramic substrate is sintered with 0.2mm thick red copper, the specification of the red copper is T2Y2, and the purity is >99.90%. The surface of the sintered copper clad laminate is polished to contro...

Embodiment 3

[0081] Refer to attached image 3 .

[0082] A preparation method of a high-voltage intensive thermoelectric refrigerator The preparation method is mainly material preparation → component preparation → P-type component welding → N-type component welding → infrared reflow welding → electrical aging → temperature cycle → refrigerator products . The material preparation method of the refrigerator mainly uses the regional smelting technology to prepare thermoelectric materials. The thermoelectric materials prepared by this method have good orientation characteristics and good thermoelectric transmission performance. The main path is raw material purification→thermoelectric material smelting→regional smelting→hot extrusion→annealing→thermoelectric performance testing. The main raw materials for the preparation of thermoelectric materials are Bi, Te, Se, Sb, etc. The requirement for such materials is that the purity is ≥99.99%. ", by introducing this technology to purify thermoel...

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Abstract

The invention relates to a high voltage intensive type thermoelectric refrigerator and a preparation method thereof and belongs to the technical field of thermoelectricity. The middle of the high voltage intensive type thermoelectric refrigerator is provided with an N type thermoelectricity element and a P type thermoelectricity element, the two sides of the high voltage intensive type thermoelectric refrigerator are provided with gold plating ceramic plates, and the thermoelectricity elements are provided with leads. The end faces of the thermoelectricity elements are provided with nickel layers which are 1-4 [mu]m, the unit intensity of the thermoelectricity elements is 0.29 pair / mm or above, and the interval between the thermoelectricity elements is 0.3-0.6 mm. The method for preparing the high voltage intensive type thermoelectric refrigerator comprises the steps of sintering red copper on the surface of a ceramic substrate for the cold and hot surface gold plating ceramic plates, and plating nickel and gold; adopting laser cutting for the thermoelectricity elements, adopting a chemical nickel plating process for the thermoelectricity elements to form a nickel layer on the end face; welding the N type thermoelectricity element and the P type thermoelectricity element to form a ceramic chip assembly; performing installation through an integrated welding die, performing welding to form the refrigerator, and welding the leads. The high voltage intensive type thermoelectric refrigerator has the advantages of being reliable in process, high in rate of finished products, intensive, small in size, high in refrigeration power and excellent in environmental adaptation.

Description

technical field [0001] The invention belongs to the technical field of thermoelectricity, and in particular relates to a high-voltage intensive thermoelectric refrigerator and a preparation method thereof. Background technique [0002] At present, most common thermoelectric refrigerators on the market are low-voltage, high-current devices, and the conventional sizes are 15mm×15mm (31 pairs), 23mm×23mm (71 pairs), 30mm×30mm (127 pairs), 40mm×40mm (127 pairs) and 55mm×55mm (127 pairs). When this type of device works, the current is usually ≥2A, so the power required is relatively large, and it is only suitable for ground commercial use or ground military use where there is no power consumption problem, especially not suitable for space applications with strict power requirements. [0003] At present, refrigerators have been widely used in space, especially in star sensors, low-temperature black bodies, infrared CCDs, loop heat pipes, laser rangefinders and other stand-alone a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B21/02
Inventor 马洪奎安晓雨丁汀梁亮连洪奎杨文昭
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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