Variable frequency dehumidifier control method and device and dehumidifier

Abstract

The invention discloses a variable frequency dehumidifier control method and device and a dehumidifier. The method includes: S1, controlling the dehumidifier to run in a preset state; S2, detecting environment dry-bulb temperature and relative humidity in the dehumidifier and temperature of an evaporator in the dehumidifier; S3, calculating dew-point temperature according to the environment dry-bulb temperature and relative humidity; S4, judging whether the dew-point temperature is higher than a first preset threshold or not; S5, if the dew-point temperature is higher than the first preset threshold, further judging whether the temperature of the evaporator is lower than or equal to a second preset threshold or not; S6, if the temperature of the evaporator is lower than or equal to the second preset threshold, lowering compressor frequency of the dehumidifier, increasing fan speed of the dehumidifier, and continuing to execute the step 2 after running for the preset time. By the method, the dehumidifier can delay frosting under the working condition that the dew-point temperature is higher than 0 DEG C, and dehumidification capacity under the working conditions is increased.

Description

Technical field [0001] The invention relates to the technical field of dehumidifiers, in particular to a control method and device of a frequency conversion dehumidifier and a dehumidifier with the control device. Background technique [0002] At present, when the dehumidifier operates in some medium and low temperature environments, the temperature of the evaporator in the dehumidifier will be very low. Generally, the dehumidification capacity is obtained by turning the frost into water after one end of the evaporator is frosted. However, in the process of controlling the amount of dehumidification, there are two main factors that will reduce the amount of dehumidification: (1) During the frosting process, the more frost on the surface of the evaporator, the worse the heat exchange with the air, and it is not easy to turn the frost into Water reduces the amount of dehumidification; (2) During the defrosting process, the wind will sublime part of the solid frost directly into the...

AI Technical Summary

Problems solved by technology

However, in the process of controlling the amount of dehumidification, there are two main factors that will lead to a decrease in the amount of dehumidification: (1) During the frosting process, the more frost on the surface of the evaporator, the worse the heat exchange with the air, and it is not easy to turn the frost into (2) During the defrosting process, the wind will directly sublimate part of the solid frost into the air, resulting in a decrease in the dehumidification capacity

Images