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Micro refrigerator and refrigeration method

A technology of micro-refrigerator and refrigeration method, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., which can solve the problems of large refrigeration effect, high field voltage, sensitivity of polarization rate with temperature changes, etc., and achieve large temperature drop Good, uniform and fast heat transfer, good cooling space uniformity and temperature control effect

Inactive Publication Date: 2006-04-19
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

However, Document 5 only gives the depolarization-time relationship between BaTiO3 samples at 127 degrees (Curie temperature), and the working temperature at 127 degrees is very high, which is not suitable for room temperature cooling of electronic components. At the same time, the polarizability varies with temperature Sensitive, the cooling effect changes greatly with temperature, and the cooling stability is not good
Document 5 also shows that under different conditions, the PMN-PT sample only has the maximum cooling effect of depolarization, and the net cooling effect of continuous circulation is not reflected. Continuous large cooling

Method used

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  • Micro refrigerator and refrigeration method
  • Micro refrigerator and refrigeration method

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0036] Fig. 1 shows the structure of a specific embodiment of a ferroelectric stack array microrefrigerator of the present invention. As shown in Figure 1, the ferroelectric stack array micro-refrigerator of the present invention is composed of n layers of ferroelectric cooling sheets 1 and m rows×l columns of ferroelectric cooling sheets 1 stacked, electrodes and electrodes are placed between the upper and lower sides of the cooling sheets 1 lead. An insulating and heat-conducting insulating layer 3 made of an insulating and heat-conducting material made of PMNT or mica is sandwiched between layers and between rows and columns. The cooling sheet is made of PMNP or other ferroelectric materials with thermoelectric effect.

[0037] Fig. 2 is a schematic diagram of an embodiment model of the combined state of the chip substrate to be refrigerat...

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Abstract

A micro - refrigerator is prepared as applying relaxation ferroelectric material as working media of refrigeration , using n layers of ferroelectric stacks and m x 1 arrays of ferroelectric stacks as sum of n x m x 1 units to form micro ¿C refrigerator . Its refrigerating method includes applying phase transition refrigeration of electric field induction as quickly adding electric field and slowly putting off electric field on each refrigerating sheet (RS), using the same working mode in the same layer or in each interval layer of RS in different line, using specific time sequence and circulation for each layer of RS and operating ferroelectric stack arrays alternatively.

Description

technical field [0001] The invention belongs to a micro-refrigerator and a refrigeration method thereof, in particular to a ferroelectric pile array micro-refrigerator and a refrigeration method thereof. Background technique [0002] The traditional refrigeration methods currently used in electronic equipment are: [0003] (a) Use a certain length of heat sink to cool based on natural convection; [0004] (b) strong convection cooling by means of fans; [0005] (c) Cooling by forced convection and heat conduction by water or other cooling means; [0006] (d) Semiconductor thermoelectric cooling. [0007] Using traditional refrigeration methods, on the one hand, additional mechanical components or refrigerating liquid are required for the operation of the refrigerator. Even semiconductor refrigerators based on the thermoelectric effect require fans or flowing refrigerating liquid to cool down at the hot end, and similar problems exist. On the other hand, the refrigerator ...

Claims

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Application Information

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IPC IPC(8): F25B21/00
CPCF25B2321/001Y02B30/66F25B2400/15Y02B30/00
Inventor 李艳秋尚永红刘少波张清涛
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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