Phase change cold storage type semiconductor electronic refrigerator and method for improving refrigeration efficiency

Abstract

The invention discloses a phase change cold-accumulating semiconductor electronic refrigerator and a method for increasing the refrigerating efficiency thereof. The electronic refrigerator comprises a cabinet having heat-preserving and phase change cold-accumulating functions, wherein the container consists of a protective shell, a heat-preserving layer and a phase change layer in sequence from outside to inside; a container filling material of the electronic refrigerator consists of a phase change material and a heat-preserving material. When articles needing to be refrigerated are put into the electronic refrigerator reaching a set refrigeration temperature, the phase change layer undergoes phase change to release cold quantity, and a semiconductor refrigeration chip works normally according to current Io which corresponds to a maximum energy efficiency ratio; till the articles needing to be refrigerated reach the set refrigeration temperature, the semiconductor refrigeration chip can still work continuously according to the current Io which corresponds to the maximum energy efficiency ratio, and residual cold quantity is accumulated in the phase change material. The electronic refrigerator can constantly work at the current Io which corresponds to the maximum energy efficiency ratio, and invalid cold loss caused by heat transfer through a condenser and the like during start and stop control is avoided.

Description

technical field [0001] The invention relates to a refrigeration device, in particular to a phase-change cold storage type semiconductor electronic refrigerator and a method for improving refrigeration efficiency. Background technique [0002] Semiconductor refrigeration, also known as thermoelectric refrigeration or thermoelectric refrigeration, is a refrigeration technology based on the Peltier effect. [0003] The two key indicators for evaluating semiconductor electronic refrigerators are cooling speed and power consumption. The cooling speed depends on the cooling capacity of the semiconductor refrigeration chip, and the power consumption depends on the cooling efficiency of the semiconductor refrigeration chip. Since the maximum cooling capacity of semiconductor cooling chips and the optimal working current corresponding to the maximum energy efficiency ratio are different (see figure 1 , the current corresponding to the maximum cooling capacity is I m , the current c...

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Problems solved by technology

[0007] The purpose of the invention is to overcome the above-mentioned deficiencies in the prior art, improve the semiconductor electronic refrigerator constant current I E Low working efficiency, small cooling capacity, increased cold loss due to reverse heat transfer when shutdown, and self-regulating current semiconductor electronic refrigeration only part of the time at current I o The problem of large power consumption caused by the work under the environment provides a phase change cold storage type semiconductor electronic refrigerator and a method for improving refrigeration efficiency. The refrigerator and the method mainly use phase change materials to allow the electronic refrigerator to have cold storage and release functions. The temperature inside the refrigerator is stabilized at the phase transition temperature, so that the semiconductor electronic refrigerator has been working stably at the current corresponding to the maximum energy efficiency ratio, and can effectively prevent the heat from being transferred into the refrigerator through the refrigeration chip when it is shut down

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