Dual-Brushless Combustion Head for Faster Parking Heater Downshift
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Solution Overview
Problem
Current single-motor combustion head parking fuel air heaters face limitations in air volume and heating efficiency due to synchronized speed restrictions between wind wheels, leading to heat accumulation, long downshift times, and inadequate heating in integrated air ducts.
Innovation Solution
A dual brushless motor combustion head parking fuel air heater with independent control of hot and combustion-supporting wind wheels via separate brushless motors and a controller, allowing for adjustable speed and fuel supply to optimize air volume and heat distribution, featuring a heat exchanger and temperature sensors for precise temperature management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor drives both combustion-supporting wind wheel and hot wind wheel synchronously, then the structure is simple, but the air volume is limited due to speed restrictions
Solution Approach 1:
The patent divides the single motor system into two independent brushless motors: one dedicated to driving the combustion-supporting wind wheel and another for the hot wind wheel. This segmentation allows each motor to operate independently at optimal speeds, resolving the speed restriction problem while maintaining structural simplicity through functional separation.
Solution Approach 2:
The patent implements dynamic speed control for each motor based on operational requirements. The controller adjusts the rotating speeds of the two motors independently, allowing the hot wind wheel motor to operate at higher speeds for increased air volume while the combustion-supporting motor maintains appropriate speeds for stable combustion, eliminating the synchronous speed limitation.
2Productivity
If the hot wind wheel rotates at high speed to increase air volume, then heating efficiency improves, but heat accumulation occurs during downshift due to slow combustion-supporting wind wheel response
Solution Approach 1:
The controller dynamically adjusts the speeds of both motors during operational transitions. When downshifting occurs, the combustion-supporting motor speed is increased promptly to match the hot wind wheel's speed change, preventing heat accumulation by ensuring continuous adequate combustion support during the transition period.
Solution Approach 2:
The system uses temperature sensors to monitor heat exchanger temperature in real-time. When temperature changes indicate downshift conditions, the controller receives feedback and automatically adjusts the combustion-supporting motor speed to prevent heat accumulation, ensuring smooth transitions without time loss or safety issues.
3Loss of substance
If the combustion-supporting wind wheel rotates at low speed to consume residual fuel during shutdown, then fuel consumption is reduced, but the hot wind wheel cannot cool the machine at high speed resulting in long shutdown delay
Solution Approach 1:
During shutdown, the controller dynamically controls the hot wind wheel motor to maintain high speed operation while the combustion-supporting motor reduces to low speed for residual fuel consumption. This dynamic differential speed control allows the hot wind wheel to continue cooling the machine efficiently even as the combustion system winds down, significantly reducing shutdown delay time.
Solution Approach 2:
The system prepares for shutdown by gradually reducing the combustion-supporting motor speed while maintaining or increasing the hot wind wheel motor speed. This preliminary action sequence ensures that cooling continues effectively throughout the shutdown process, preventing heat accumulation and reducing overall shutdown time while still allowing residual fuel consumption.
4Area of stationary object
If a multi-branch integrated air duct is used to distribute hot air, then air distribution coverage is improved, but the air volume at far outlets is weak due to single motor limitations
Solution Approach 1:
The patent segments the air supply function by dedicating the hot wind wheel motor specifically to driving the integrated air duct system. This independent motor provides sufficient power to maintain strong air volume throughout the multi-branch duct network, ensuring that far outlets receive adequate airflow despite the extended distribution network required for comprehensive coverage.
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 solution reduces downshift time and shutdown delay while enhancing heating efficiency by independently controlling wind wheel speeds and fuel supply, ensuring effective air volume and heat distribution in integrated air ducts.
Implementation Method 1
a heat exchanger (4), wherein the heat exchanger (4) is provided at an end of the housing assembly (1) close to the air outlet (3)
Implementation Method 2
A heat exchange channel is arranged between the heat exchanger and the housing assembly, and the heat exchange channel is respectively communicated with the air inlet and the air outlet
Implementation Method 3
a hot wind wheel brushless motor (5) is provided at the air inlet (2), and the hot wind wheel brushless motor (5) is connected with a hot wind wheel (6)
Implementation Method 4
a combustion chamber assembly (11) is provided inside the heat exchanger (4), the combustion chamber assembly (11) and the combustion-supporting wind wheel (10) are located on a same straight line
Data Source
Figure 1
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Figure 3
AI summary
Disclosed is a dual brushless motor combustion head parking fuel air heater, including a housing assembly, an air inlet and an air outlet. A heat exchanger is provided at an end of the housing assembly close to the air outlet. A heat exchange channel is arranged between the heat exchanger and the housing assembly, and the heat exchange channel is respectively communicated with the air inlet and the air outlet. A hot wind wheel motor is provided at the air inlet, and the hot wind wheel motor is connected with a hot wind wheel. The heat exchanger is connected with an aluminum bracket, and a combustion-supporting wind wheel motor and a combustion-supporting air inlet are provided in the aluminum bracket. An output shaft of the combustion-supporting wind wheel motor is configured to penetrate through the aluminum bracket and connect with a combustion-supporting wind wheel, and the combustion-supporting air inlet is located at one side close to the combustion-supporting wind wheel. A combustion chamber assembly is provided inside the heat exchanger, the combustion chamber assembly and the combustion-supporting wind wheel are located on a same straight line, and an ignition plug assembly and a fuel inlet are provided inside the combustion chamber assembly.