Compressor frequency regulation method, control apparatus, heat exchange device and electronic device
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Solution Overview
Problem
Compressor shutdowns due to excessive exhaust temperature, leading to increased energy consumption and reduced stability in heat exchange devices, particularly in household appliances like clothes dryers.
Innovation Solution
Adjusting the compressor frequency to reduce exhaust temperature through frequency conversion control, eliminating the need for cooling fans and simplifying the heat exchange system structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the compressor operates at high frequency to improve heat exchange efficiency, then the heat exchange efficiency is improved, but the exhaust temperature becomes excessively high causing compressor shutdown
Solution Approach 1:
The patent applies dynamic frequency adjustment by continuously monitoring exhaust temperature and adjusting compressor frequency in real-time. The control method dynamically switches between high frequency (for efficiency) and low frequency (for temperature control) based on thermal conditions, resolving the contradiction between productivity and reliability
Solution Approach 2:
The patent changes the operating parameter (frequency) of the compressor based on exhaust temperature thresholds. When temperature exceeds a threshold, frequency is reduced; when temperature is acceptable, frequency is increased. This parameter adaptation allows the system to maintain both high efficiency and operational stability
2Temperature
If a cooling fan is added to reduce compressor exhaust temperature, then the exhaust temperature is controlled, but the system complexity and component quantity increase
Solution Approach 1:
The patent makes the compressor self-regulating by using its own operating parameters (frequency) to control its exhaust temperature. The frequency adjustment mechanism allows the compressor to self-manage thermal conditions without external cooling assistance, eliminating the need for additional cooling fans and reducing system complexity
Solution Approach 2:
The patent extracts the cooling function from a separate component (cooling fan) and integrates it into the compressor's operational control through frequency adjustment. By taking out the need for a dedicated cooling device and embedding temperature control within the frequency regulation mechanism, the system achieves temperature management with fewer components
3Temperature
If the compressor frequency is reduced to lower exhaust temperature, then the temperature is controlled, but the heat exchange efficiency decreases
Solution Approach 1:
The patent employs periodic frequency adjustment where the compressor alternates between high-frequency operation (for efficiency) and low-frequency operation (for temperature control) based on thermal feedback. This periodic switching allows the system to achieve both temperature management and maintained productivity over time
Solution Approach 2:
The patent implements a feedback control mechanism where exhaust temperature measurements inform frequency adjustment decisions. The temperature feedback loop ensures that frequency is reduced only when necessary to maintain temperature within acceptable ranges, thereby minimizing the impact on heat exchange efficiency while still achieving temperature control
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
Stabilizes compressor operation, reduces energy consumption, and enhances heat exchange efficiency while minimizing noise and system complexity.
Implementation Method 1
controlling the compressor to perform frequency reduction processing to reduce the first operating frequency to a second operating frequency
Implementation Method 2
make a second exhaust temperature of the compressor operating at the second operating frequency be lower than the first preset temperature
Data Source
AI summary
A compressor frequency regulation method includes acquiring a first exhaust temperature of a compressor operating at a first operating frequency; determining that the first exhaust temperature is greater than or equal to a first preset temperature; controlling the compressor to perform frequency reduction processing, the frequency reduction processing reducing the first operating frequency to a second operating frequency, such that a second exhaust temperature of the compressor operating at the second operating frequency is less than the first preset temperature; and controlling the compressor to operate at the second operating frequency.