Analysis And Experimental Study On The Control Method Of Energy Storage Defrosting Of Air-cooled Heat Pump

It is indicated that air cooled heat pump will appear frost phenomenon in acertain range of temperature and humidity in the practical application so It isnecessary to study the defrosting of air cooled heat pump. The defrosting controlmethod of the new energy storage with higher efficiency is found in the experiment,because there are still some disadvantages in the conventional defrosting methods ofair cooled heat pump. This paper is to find the suitable control method for the energystorage defrosting system. And on the premise of ensuring satisfactory indoor airquality, it is that find the optimal defrosting start time and defrosting end time thatextend the defrosting interval twice as long as possible., which can make the systemto provide the stability of the heating time and reduce the consumed time ofdefrosting.For the purpose above, at first, this paper designs a suitable experimentplatform for studying on the defrosting control method of energy storage defrostingsystem and set it up. This system can manually set to the defrosting start time anddefrosting end time. It is that find the need parameters in the defrosting experimentand arrange measuring points in the proper position. Secondly, based on a largeamount of experimental data obtained in the frosting experiment, the suitablecontrolling parameters are found which decide the defrosting starting point. And thevariations of these parameters in the frosting experiment resolve the suitabledefrosting start time. The effect of temperature and humidity in the outdoorenvironment are analyzed for modifying the frost control start time that are found inthis paper. Thirdly, the appropriate end time besides is found with the variousparameters obtained by the defrosting experimental data were analyzed. At then, thecontrol method of energy storage defrosting system compares with the controlmethod of conventional defrosting system and the advantages of energy storage defrosting control method is summarized.Finally, the control method of energy storage defrosting system on account of"time-temperature difference-temperature deviation rate is determined byconfining the parameter of the defrosting start time and the defrosting end time.Then it is designed to specific chart the on account of summarizing the defrostingcontrol method in this paper and briefly narrated the conditions of false defrosting.