Dryer Heat Pump Inverter Compressor Control for Faster Initial Heating
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Solution Overview
Problem
Conventional dryers face inefficiencies in supplying heated air during the initial driving period, particularly in quick drying cycles, due to the use of fixed velocity compressors which lead to reduced drying efficiency and extended drying times.
Innovation Solution
A control method for dryers incorporating an inverter compressor that adjusts electric power and driving velocity based on determined driving conditions, such as the quantity of drying objects and peripheral temperature, to enhance the supply of heated air during the initial period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed velocity compressor is used in the heat pump, then the structure is simple, but the drying efficiency is reduced and drying time is extended during the initial driving period
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed velocity compressor with an inverter compressor that can dynamically adjust its driving velocity. The control unit varies the compressor's rotational speed based on operating conditions (such as ambient temperature and load requirements), enabling the heat pump to quickly reach optimal operating temperature during the initial driving period while maintaining energy efficiency throughout the drying cycle.
2Productivity
If the compressor driving velocity is increased during initial driving period, then heated air supply is improved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the compressor's driving velocity parameter based on real-time operating conditions. During the initial driving period, the control unit increases the compressor velocity to quickly establish heated air supply. Once the heat pump reaches optimal operating temperature, the control unit reduces the compressor velocity to an energy-efficient level, thereby achieving fast initial heating without sustained high energy consumption.
Solution Approach 2:
The control unit implements feedback control by continuously monitoring the heat pump's operating temperature and adjusting the compressor driving velocity accordingly. This closed-loop control ensures that the compressor operates at high velocity only when necessary (during initial heating phase) and transitions to lower velocity when the desired temperature is achieved, optimizing the balance between productivity and energy consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the operational efficiency of the heat pump in supplying heated air, reducing drying time and maintaining efficiency even in initial driving periods, thus enabling faster and more effective drying.
Implementation Method 1
a control method includes detecting a driving condition of a dryer; and varying at least one of an electric power consumed by an inverter compressor and a driving velocity of the compressor based on the detected driving condition
Data Source
AI summary
A control method of a dryer is disclosed. A control method of a dryer including a heat pump having a inverter compressor includes determining a driving condition of the dryer; and adjusting at least one of an electric power supplied to the inverter compressor and a driving velocity of the compressor based on the driving condition.