Control method of heat pump clothes dryer
A control method and technology for a clothes dryer, which are applied in the field of clothes dryers, can solve problems such as affecting the working performance of the clothes dryer, measurement deviation, etc., and achieve the effects of simple and reasonable structure, reliable operation and precise control.
Inactive Publication Date: 2015-11-18
GUANGDONG MEIZHI PRECISION MFG
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Problems solved by technology
The control method is by measuring the humidity of the clothes, the absolute moisture content of the incoming air, the absolute moisture content of the outgoing air, the temperature of the incoming air, the temperature of the return air, and the temperature between the incoming air and the return air. The measurement deviation caused by a long time will affect the working performance of the dryer
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[0046] see image 3 , the difference between this embodiment and the first embodiment is that in the first embodiment, when k T2 、k ΔT 、k HUM When the change speed of any two of the three reaches the preset condition of the system, the drying program is considered to be over. However, the control method in this embodiment is to record and store the last three suitable data and average: the rate of change k of the outlet air temperature T2 T2 , Relative humidity change speed k at the air outlet HUM and the change speed k of the temperature difference ΔT between the inlet air temperature T1 and the outlet air temperature T2 ΔT , use this data as the system preset condition when the heat pump dryer will work next time, that is to say, compare the latest data within the specified time with the historical data, and then judge whether the drying process is over.
[0047] Each of the last three suitable data should satisfy: when k T2 ≤k T2 ', k HUM ≤k HUM ' and k △T ≤k ΔT ...
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Provided is a control method for a heat pump clothes dryer. The heat pump clothes dryer comprises a drying cylinder, the drying cylinder is provided with an air inlet and an air outlet, the air inlet and the air outlet are respectively provided with a temperature sensor, and the air outlet is further provided with a relative humidity sensor. The control method is characterized in that whether the running of the drying cylinder meets preset conditions of a system is judged according to the change speed kT2 of air outlet temperature T2 of the air outlet, the change speed kdeltaT of the temperature difference deltaT between the air inlet and the air outlet and the change speed kHUM of the relative humidity HUM of the air outlet; when two random conditions are met in the three conditions that kT2<=kT2', kHUM<=kHUM' and kdeltaT<=kdeltaT', the drying cylinder stops running, and a clothes drying program is ended. Judging inaccuracy caused by the fact that the heat pump clothes dryer is subject to influences of test sensor drifting is avoided, and the heat pump clothes dryer has the advantages being simple and reasonable in structure, having control accuracy and working reliably.
Description
technical field [0001] The invention relates to a clothes dryer, in particular to a control method for a heat pump clothes dryer. Background technique [0002] The advent of clothes dryers has brought great convenience to people's lives, enabling people to get dry clothes even in rainy days. [0003] Heat pump dryers have the advantages of high energy efficiency, can effectively capture moisture in the air, and have less impact on the surrounding environment. The precise control method of heat pump dryers has become the focus of research by various dryer manufacturers. There are three main control methods for existing dryers: 1) It is a method to directly test the moisture content of clothes with a clothes humidity sensor. Humidity sensors are divided into resistive and capacitive. Different humidity corresponds to different resistance or capacitance. This control method requires a large number of tests to verify and make it correspond. However, the clothing humidity sensor...
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IPC IPC(8): D06F58/28
CPCD06F58/30D06F58/38D06F2103/08
Inventor 冯利伟
Owner GUANGDONG MEIZHI PRECISION MFG