Compressor Voltage-Adaptive Temperature Control for Energy Efficiency
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Solution Overview
Problem
Existing electrical devices with compressors suffer from reduced energy efficiency due to fixed cut-off and fan cut-in temperatures set for abnormal voltage conditions, leading to inefficient operation and prolonged stoppages under normal conditions.
Innovation Solution
A control unit dynamically adjusts the cut-off and fan cut-in temperatures based on real-time voltage monitoring, ensuring efficient operation by preventing damage from high currents and maintaining efficiency under varying voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixed cut-off and fan cut-in temperatures are set for abnormal voltage conditions, then compressor protection under low voltage is improved, but energy efficiency under normal voltage conditions deteriorates
Solution Approach 1:
The patent applies dynamics by transitioning from fixed temperature thresholds to dynamic, voltage-adaptive thresholds. The control unit continuously monitors voltage and adjusts the cut-off and fan cut-in temperatures in real-time based on current voltage conditions, allowing the system to optimize both protection and efficiency across varying operating conditions
Solution Approach 2:
The patent changes the parameters of cut-off temperature and fan cut-in temperature based on voltage levels. Instead of using fixed values, the system modifies these temperature parameters dynamically according to the detected voltage, enabling optimal performance across different voltage conditions without sacrificing protection or efficiency
2Reliability
If cut-off temperature is set for lowest voltage condition, then safety under abnormal conditions is improved, but operation duration under normal conditions decreases
Solution Approach 1:
The system dynamically adjusts the cut-off temperature threshold based on real-time voltage monitoring. Under normal voltage conditions, a higher cut-off temperature allows longer operation duration, while under low voltage conditions, the threshold is reduced to ensure safety, thus adapting the protection level to current operating conditions
3Reliability
If fan cut-in temperature is set for lowest voltage condition, then cooling protection under abnormal conditions is improved, but system efficiency under normal conditions deteriorates
Solution Approach 1:
The fan cut-in temperature is adjusted dynamically based on voltage conditions. Under normal voltage, a higher fan cut-in temperature reduces unnecessary fan operation and energy loss. Under low voltage conditions, the fan activates at lower temperatures to provide adequate cooling protection, thus optimizing the balance between protection and efficiency
4Temperature
If forced cooling is activated frequently, then motor temperature control under abnormal conditions is improved, but energy efficiency deteriorates
Solution Approach 1:
The forced cooling activation temperature is made dynamic and voltage-dependent. Under normal voltage conditions, the higher fan cut-in temperature prevents unnecessary forced cooling cycles, reducing energy consumption. Under abnormal low voltage conditions, the system activates cooling at lower temperatures to prevent motor damage, thus adapting cooling behavior to voltage conditions
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
The solution ensures safe and efficient operation of the compressor by adaptively updating temperatures, minimizing inefficiencies and maintaining performance without prolonged stoppages, thus enhancing user satisfaction.
Implementation Method 1
the temperature on the negative temperature coefficient thermistor is detected and the compressor is turned off and on depending on this detected temperature
Implementation Method 2
compress the refrigerant fluid used in the cooling cycle with the electrical energy supplied from the electricity grid so as to increase the pressure thereof
Implementation Method 3
compress the refrigerant fluid used in the cooling cycle with the electrical energy supplied from the electricity grid so as to increase the pressure thereof
Data Source
Figure 1
AI summary
The present invention relates to an electrical device (1) comprising a compressor (4) with improved energy efficiency. The electrical device (1) comprises a body (2); a compressor (4) which is disposed in the body (2) and which has at least one electric motor (3); at least one fan (5) which is configured to blow air onto the compressor (4); at least one temperature sensor (6) which is configured to detect the temperature of the electric motor (3) and/or the compressor (4); and at least one control unit (7) which stores a cut-off temperature value at which the operation of the electric motor (3) is stopped and a fan cut-in temperature value at which the operation of the fan (5) is started, and which is configured to control the operation of the electric motor (3) and the fan (5) depending on the temperature information received from the temperature sensor (6), the recorded cut-off temperature value and fan cut-in temperature value.