Method for controlling expansion valve of frequency conversion heat pump clothes dryer

Abstract

The invention relates to a method for controlling an expansion valve of a frequency conversion heat pump clothes dryer. A frequency conversion compressor of the clothes dryer includes a frequency ascending stage, a frequency retaining stage, and a frequency descending stage. The open degree of the electronic expansion valve can be adjusted through parameters such as the operation time / power / current at an operation frequency / a certain frequency of the frequency conversion compressor; in the same clothes drying mode, a reference value of the operation time / power / current at the certain frequency is set, and an actual value of the operation time / power / current at the certain frequency of the compressor and the set reference value are compared; if the actual value of the operation time at the certain frequency is less than the set reference value or the actual value of the power / current is greater than the reference value, the open degree of the expansion value is turned up; and if the actual value of the operation time at the certain frequency is greater than the set reference value or the actual value of the power / current is less than the set reference value, the open degree of the expansion valve is turned down.

Description

technical field [0001] The invention relates to the field of clothes dryers, in particular to a control method for an expansion valve of a frequency conversion heat pump clothes dryer. Background technique [0002] In daily life, clothes are mostly dried by natural drying. However, it takes a long time to dry clothes by natural drying. Especially in the mild rainy season in the south, it is difficult to dry them after drying for many days. Therefore, clothes dryers are more and more favored by users, but now Most of the drying modes with dryers are relatively simple. Consumers have further demands for humanized operation modes of dryers, which are mainly manifested in the following three aspects. Demand 1: When using dryers at night when people are resting, they require The noise should be low. Requirement 2: When the user is in a hurry, it is necessary to meet the user's higher requirements for the drying speed. Requirement 3: When the user is not very anxious about the dr...

AI Technical Summary

Problems solved by technology

[0002] In daily life, clothes are mostly dried by natural drying. However, it takes a long time to dry clothes by natural drying. Especially in the mild rainy season in the south, it is difficult to dry them after drying for many days. Therefore, clothes dryers are more and more favored by users, but now Most of the drying modes with dryers are relatively simple. Consumers have further demands for humanized operation modes of dryers, which are mainly manifested in the following three aspects. Demand 1: When using dryers at night when people are resting, they require less noise

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