In this work, the effect of flow circuitry on the performance of a household freezer with a tube-on-sheet evaporator is investigated. The evaporator used in the freezer is a tube-on-sheet type where the tubes are bent and attached underneath the shelves, as in the serpentine heat exchanger. The evaporator is composed of six shelves that are located inside the cabin with a particular distance between each. Four different refrigerant circuitries are modeled to identify the one that provides a homogeneous temperature distribution while consuming less energy, and experiments are conducted by switching the refrigerants flow route between the shelves. The uniform temperature distribution at around the target temperature and the energy consumption of the entire system while achieving this target are monitored as the major performance measures of the investigation. The tests are conducted according to IEC 62552:2015, standard clause 8. The experiments found that the change of the flow circuitry has a crucial impact on the temperature distribution’s uniformity and energy consumption. The type in which the refrigerant circuitry between the shelves is 2-1-6-5-4-3 has the best performance in terms of temperature distribution and energy consumption.

在这项工作中，研究了流动回路对带管上蒸发器的家用冷冻机性能的影响。冷冻室中使用的蒸发器是片上管式的，其中弯曲的管子固定在架子下面，就像在蛇形热交换器中一样。蒸发器由六个搁板组成，这些搁板位于驾驶室内，每个搁板之间有特定的距离。对四个不同的制冷剂回路建模，以识别提供均匀温度分布而消耗较少能量的回路，并通过在架子之间切换制冷剂流动路径进行实验。监测目标温度附近的均匀温度分布以及在达到该目标的同时整个系统的能耗是调查的主要性能指标。测试是根据IEC 62552：2015标准第8条进行的。实验发现，流动回路的变化对温度分布的均匀性和能耗产生了至关重要的影响。在温度分布和能耗方面，搁板之间的制冷剂回路为2-1-6-5-4-3的类型具有最佳性能。