This paper presents an experimental study on the performance of a semiconductor freezer for food and medicine preservation. The developed two-stage thermoelectric cooler (TTEC) for the freezer contains two-stage thermoelectric modules (TTEMs), a plate fin heat sink, and a heat pipe heat sink. The experiments were carried out for 37.8-liters freezer prototype in a standard climatic chamber. Effects of TTEC configurations on the refrigeration performance of the freezer at different ambient temperatures were experimentally evaluated. The tested results indicate that the lowest temperature inside the freezer cabinet can reach −14.9 °C in the optimal input current of 4.67A when the ambient temperature is 25 °C. and the largest temperature difference between both sides of the TTEMs is 62.1 K in the proper configuration. Furthermore, the evaluated refrigerating capacity of TTEC can reach the largest of 53.50 W, and the COPs of TTEM and freezer achieve the maximum values of 0.237 and 0.153, respectively. The experimental results mean that we extend the application field of thermoelectric cooling technology to the freezer, which provides the experimental basis for the research and development of thermoelectric freezers. In general, the performance characteristics of the developed semiconductor freezer with the TTEMs could demonstrate its potential for small freezing device applications.

本文对用于食品和药品保鲜的半导体冷冻机的性能进行了实验研究。为冷冻机开发的两级热电冷却器 (TTEC) 包含两级热电模块 (TTEM)、板翅式散热器和热管散热器。在标准气候室中对 37.8 升冷冻机原型进行了实验。通过实验评估了 TTEC 配置对不同环境温度下冷冻机制冷性能的影响。测试结果表明，当环境温度为25℃时，在4.67A的最佳输入电流下，冷冻柜内的最低温度可以达到-14.9℃。在适当的配置下，TTEM 两侧的最大温差为 62.1 K。此外，测得的TTEC制冷量最大可达53.50 W，TTEM和冷冻机的COPs分别达到最大值0.237和0.153。实验结果意味着我们将热电制冷技术的应用领域扩展到冷冻机，为热电冷冻机的研发提供了实验基础。总的来说，开发的带有 TTEM 的半导体冷冻机的性能特征可以证明其在小型冷冻设备应用中的潜力。为热电制冷机的研发提供了实验基础。总的来说，开发的带有 TTEM 的半导体冷冻机的性能特征可以证明其在小型冷冻设备应用中的潜力。为热电制冷机的研发提供了实验基础。总的来说，开发的带有 TTEM 的半导体冷冻机的性能特征可以证明其在小型冷冻设备应用中的潜力。