CAJ | 학술논문

为研究带单层风幕的敞开式果蔬制冷陈列柜(以下简称陈列柜)温湿度分布规律，采用了一种立式敞开式陈列柜实验平台作为研究对象，分析陈列柜稳态运行阶段回温、降温和节能帘对温湿度场分布特性的影响。实验结果表明：在无节能帘条件下，回温工况结束时温湿度场比降温工况均匀，其温度、相对湿度分布的变异系数分别为0.25、0.08。陈列柜左部温度和相对湿度均低于右部；4层搁架温度、相对湿度分布差异显著(P<0.05)。稳态运行阶段，搁架温度和相对湿度分布呈周期性振荡，周期约为17 min；运用线性回归方法建立各测点相对湿度关于温度的函数模型，回归方程表明：相对湿度与温度呈线性正相关；与无节能帘时相比，节能帘条件下的柜内平均相对湿度高5.74％RH，平均温度低0.43℃，温度、相对湿度的波动幅度小，降温时间短和回温时间长。研究结果为果蔬用敞开式陈列柜性能的优化提供参考。
위연구대단층풍막적창개식과소제랭진렬거(이하간칭진렬거)온습도분포규률，채용료일충입식창개식진렬거실험평태작위연구대상，분석진렬거은태운행계단회온、강온화절능렴대온습도장분포특성적영향。실험결과표명：재무절능렴조건하，회온공황결속시온습도장비강온공황균균，기온도、상대습도분포적변이계수분별위0.25、0.08。진렬거좌부온도화상대습도균저우우부；4층각가온도、상대습도분포차이현저(P<0.05)。은태운행계단，각가온도화상대습도분포정주기성진탕，주기약위17 min；운용선성회귀방법건립각측점상대습도관우온도적함수모형，회귀방정표명：상대습도여온도정선성정상관；여무절능렴시상비，절능렴조건하적거내평균상대습도고5.74％RH，평균온도저0.43℃，온도、상대습도적파동폭도소，강온시간단화회온시간장。연구결과위과소용창개식진렬거성능적우화제공삼고。
In order to investigate the distribution of temperature and relative humidity of the fruit and vegetable open display cabinet with single-band air curtain,an experimental platform of the vertical open display cabinet was used for refrigeration test. The distribution char-acteristics of temperature and relative humidity of the testing display cabinet under the cooling and temperature raising conditions was ana-lyzed. The effect of night covers was also explored. The experimental results showed that the temperature and humidity are well-distributed under temperature raising condition,and the coefficient variation (CV) of temperature and the relative humidity distribution is 0. 25 and 0. 08 respectively. The temperature and relative humidity of the right of the display cabinet are higher than those of the left horizontally. The distribution of temperature and relative humidity in four shelves differs significantly (P<0. 05) in the orthogonal direction. During the steady-state operation the temperature and relative humidity distribution in four shelves is periodic oscillation and the period is about 17 min. To study the overall temperature and relative humidity of the display cabinet, the linear regression method was used to predict the effect of the relative humidity on the temperature. The regression model showed that temperature is linear with the relative humidity. Night covers can keep the relative humidity and the amplitude of temperature with minor changes,shorten the cooling time and prolong the tem-perature raising time. Compared with no night covers, the average relative humidity is higher by 5. 74%RH and average temperature is lower by 0. 43 ℃. The results will provide references to optimize the performance design of the fruit and vegetable open display cabinet.