Novel dehumidifier low-temperature defrosting method

Abstract

The invention discloses a novel dehumidifier low-temperature defrosting method which comprises the steps of detecting an environment temperature HT, judging whether a dehumidifier needs to be subjected to active defrosting or not according to the environment temperature HT, judging whether the dehumidifier needs to enter a defrosting mode or not according to a temperature PT of a coil pipe and a duration tm, deciding a shutdown time t of a compressor according to a preset temperature interval and the number n of defrosting times performed by the dehumidifier, keeping a fan to operate for defrosting at the same time, and finally, judging whether the compressor is restarted to recover normal work or not according to the temperature of the coil pipe or the shutdown time. According to the novel dehumidifier low-temperature defrosting method disclosed by the invention , by setting four temperature sections, namely three temperature intervals with the temperature larger than a first preset temperature and a maximum end value smaller than or equal to the first preset temperature, the shutdown time of the compressor is controlled precisely in a targeted mode, so that resource waste caused by long or too short shutdown time of the compressor in a single temperature section method is avoided, and the defrosting efficiency and the dehumidification efficiency of the dehumidifier are obviously improved.

Description

technical field [0001] The invention relates to a low-temperature defrosting method for a dehumidifier, in particular to a novel low-temperature defrosting method for a dehumidifier. Background technique [0002] When the refrigerated dehumidifier works in a low-temperature environment, as the working time prolongs, more and more frost will hang on the evaporator. In severe cases, the ventilation gap of the evaporator is almost completely blocked, resulting in a decrease in the working efficiency of the dehumidifier. , wasting electrical energy. In order to improve this problem, the current mainstream technology in the dehumidifier industry adopts the accumulative defrosting technology of a single temperature section. In this method, regardless of whether the ambient temperature is high or low, the shutdown time of the compressor and the accumulative defrosting The cycle of frost is fixed, which will appear: 1. When the temperature is high, there will be less frost on the e...

AI Technical Summary

Problems solved by technology

[0002] When the refrigerated dehumidifier works in a low-temperature environment, as the working time prolongs, more and more frost will hang on the evaporator. In severe cases, the ventilation gap of the evaporator is almost completely blocked, resulting in a decrease in the working efficiency of the dehumidifier. , wasting electrical energy

In order to improve this problem, the current mainstream technology in the dehumidifier industry adopts the accumulative defrosting technology of a single temperature section. In this method, no matter whether the ambient temperature is high or low, the shutdown time of the compressor and the accumulative defrosting The cycle of frost is fixed, which will appear: 1. When the temperature is high, there will be less frost on the evaporator, and the machine only needs to shut down the compressor for a very short time, and the frost can be removed by the high-speed operation of the fan clean, but the compressor is still off at this time, and does not start to enter the dehumidification work, resulting in low dehumidification efficiency of the dehumidifier

2. When the temperature is low or the humidity is high, the time when the compressor is shut down is too short, and the machine cannot completely remove the frost through the high-speed operation of the fan, and the expected defrosting effect cannot be achieved.

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