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All-solid-state electrocaloric refrigerator

A refrigerator, all-solid-state technology, applied in refrigerators, refrigeration and liquefaction, machines using electrical/magnetic effects, etc., can solve problems such as no refrigeration method

Inactive Publication Date: 2016-11-16
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the aforementioned "Large Electric Card Effect in Ferroelectric Materials" described the relevant principles, the article did not give a specific method for realizing refrigeration

Method used

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  • All-solid-state electrocaloric refrigerator
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  • All-solid-state electrocaloric refrigerator

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Embodiment Construction

[0020] The technical solutions in the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described example is only one example of the invention, and not all possible implementations. Based on the same refrigeration principle, other design implementation examples all belong to the protection scope of the present invention.

[0021] figure 1 It is a schematic diagram of the refrigeration effect of the electric card involved in the present invention. The electric card refrigeration cycle goes through four steps at a time:

[0022] (1) Apply voltage to the electric card material without exchanging heat with the outside world, and the material system realizes the adiabatic heating process 1-2. Due to the electrocard effect, the material changes from state 1 (E 1 ,T c , S h ) to state 2 (E 2 ,T h , S h ).

[0023] (2) The voltage continues to increase and the material and consta...

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Abstract

The invention discloses an all-solid-state electrocaloric refrigerator. A third electrode layer serves as a center layer. An electrocaloric refrigeration unit cold end formed by sequentially attaching a second electrocaloric material layer and a second electrode layer to one side is connected with a refrigeration sheet. An electrocaloric refrigeration unit heat end formed by sequentially attaching a first electrocaloric material layer and a first electrode layer to the other side is connected with a cooling sheet. The all-solid-state electrocaloric refrigerator further comprises a first power source and a second power source, wherein the first power source is connected with the cold end so as to provide pulse voltages, and the second power source is connected with the heat end so as to provide pulse voltages. The electrocaloric material layers are made of ferroelectric materials or relaxor ferroelectric materials with an electrocaloric effect. Film materials with excellent heat conduction but without electric conduction are sputtered on the surfaces of the first electrode layer and the third electrode layer which make contact with the refrigeration sheet and the cooling sheet, and the film materials can be BeO or AlN.

Description

technical field [0001] The invention belongs to the technical field of refrigeration equipment, in particular to an all-solid-state electric card refrigerator. Background technique [0002] The electric card effect refers to the reversible isothermal entropy change or adiabatic temperature change exhibited by materials under an applied electric field. Materials that can produce an electric card effect are called electric card materials. When an external electric field is applied to the electric card material, the polarization order of the material itself changes, resulting in an entropy change of the material. Under isothermal conditions, the material system will exchange heat with the surrounding medium; under adiabatic conditions, the temperature of the material itself will change. [0003] The refrigeration of civil air conditioners and refrigerators is mainly through the mechanical evaporation-condensation cycle, which has low efficiency, increases the peak load of ele...

Claims

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Application Information

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IPC IPC(8): F25B21/00
CPCF25B21/00Y02B30/00
Inventor 刘宏波何建萍
Owner SHANGHAI UNIV OF ENG SCI
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