Vehicle Air Compressor Thermal Control in Cold Weather
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Solution Overview
Problem
Large electric vehicles equipped with electric air compressors face temperature-related issues, where rising motor and cylinder temperatures lead to lubrication deterioration, efficiency reduction, and potential moisture and oil emulsion formation, causing braking performance deterioration and safety concerns, especially in cold environments.
Innovation Solution
An air compressor apparatus with a heat exchanger and a control unit that selectively operates blowing and cooling fans based on temperature readings to maintain optimal internal and discharge temperatures, using a heat exchanger to generate heated air and an external cooling fan to cool the compressor body, preventing excessive temperature drops and moisture formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a cooling fan is provided in each cylinder head to cool the cylinder, then the cylinder temperature is maintained, but the discharge temperature drops rapidly causing moisture generation and emulsion formation in cold weather
Solution Approach 1:
The control unit receives temperature detection signals from temperature detectors in the cylinders and adjusts cooling fan operation accordingly. When cylinder temperatures are appropriate, the control unit restricts or stops cooling fan operation to prevent discharge temperature from dropping too low, thereby preventing moisture generation and emulsion formation in the pneumatic system.
Solution Approach 2:
The cooling system transitions from static continuous cooling to dynamic conditional cooling. The cooling fan operation is made variable based on real-time temperature conditions, allowing the system to adapt cooling intensity to actual thermal needs while preventing harmful temperature drops in cold environments.
2Reliability
If the cooling fan operates continuously to maintain cylinder temperature, then lubrication function is preserved, but energy consumption increases and discharge temperature drops causing moisture in the pipeline
Solution Approach 1:
The cooling fan operates periodically rather than continuously, activating only when temperature detection signals indicate that cylinder temperatures exceed appropriate thresholds. This periodic operation maintains lubrication function when needed while reducing energy consumption and preventing moisture generation during normal temperature conditions.
Solution Approach 2:
The control unit uses temperature detection feedback to determine when cooling is necessary, operating the cooling fan only when cylinder temperatures require it. This feedback-based control eliminates unnecessary cooling operations, thereby reducing energy consumption while maintaining adequate lubrication function.
3Temperature
If the cooling fan operates at high speed to cool the cylinder rapidly, then temperature control is improved, but the discharge temperature drops causing frozen emulsion in the pneumatic system
Solution Approach 1:
The control unit applies partial cooling action by restricting cooling fan operation when cylinder temperatures are already appropriate. Instead of applying full cooling capacity, the system uses only the necessary cooling level, preventing excessive temperature drops that would lead to frozen emulsion formation in the pneumatic system.
Solution Approach 2:
Temperature detection feedback enables the control unit to match cooling fan operation intensity to actual thermal conditions. When temperatures are appropriate, cooling is restricted or stopped, preventing the discharge temperature from dropping to levels that would cause emulsion freezing in the pneumatic system.
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 effectively maintains optimal temperatures, preventing lubrication deterioration, reducing moisture and emulsion formation, and ensuring reliable pneumatic system performance by controlling temperature fluctuations and blocking cold external air, thus enhancing vehicle safety and efficiency.
Implementation Method 1
a heat exchanger provided on one side of the support bracket, and configured for raising a temperature of external air to generate heated air and provide the heated air to the compressor body
Implementation Method 2
the cooling fan may include a second motor. Cooled air from the cooling fan may be transferred to an external peripheral surface of the cylinder and an external surface of the compressor body
Data Source
AI summary
An air compressor apparatus for a vehicle configured for appropriately maintaining an internal temperature and a discharge temperature thereof even in a cold environment, and a method for controlling a temperature of the same, includes a compressor body driven by a first motor; a support bracket supporting the compressor body and configured to be coupled to the vehicle; and a heat exchanger provided on one side of the support bracket, and configured for raising a temperature of external air to generate heated air and provide the heated air to the compressor body.