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Micro refrigerator and refrigeration method

A technology of micro-refrigerators and refrigeration methods, applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., can solve the problems of high field voltage, sensitivity of polarization rate with temperature changes, and continuous cycle and continuous net refrigeration effect. Achieve uniform and rapid heat transfer, large temperature drop, good cooling space uniformity and temperature control effect

Inactive Publication Date: 2009-11-04
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

However, Literature 5 only gives BaTiO 3 The relationship between the depolarization of the sample at 127 degrees (Curie temperature) and time, and the working temperature of 127 degrees is very high, which is not suitable for room temperature cooling of electronic components. At the same time, the polarizability is sensitive to temperature changes, and the cooling effect changes greatly with temperature , poor cooling stability
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

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] figure 1 Shown is the structure of the embodiment of the ferroelectric stack array microrefrigerator of the present invention. Such as figure 1 As shown, the ferroelectric stack array microrefrigerator of the present invention is composed of n layers of ferroelectric refrigeration sheets 1 and m rows x l columns of ferroelectric refrigeration sheets 1 stacked, electrodes and leads are sandwiched between the upper and lower sides of the refrigeration sheets 1. 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.

[0038] figure 2 It is a schematic diagram of an embodiment model of the combined state of the chip ...

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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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Patent Type & Authority Patents(China)
IPC IPC(8): F25B21/00
CPCF25B2321/001F25B2400/15Y02B30/66Y02B30/00
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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