Parking Heater Waste Gas Routing for Air Preheating
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Solution Overview
Problem
Existing parking heaters suffer from high energy waste and low energy utilization rates, leading to inefficient heating and fuel consumption, as evidenced by European patents EP4029709 and EP0632769.
Innovation Solution
A parking heater design with a combustion device featuring a cylindrical combustion chamber and waste gas pipeline that extends around the air inlet, enhancing energy utilization by recycling waste heat through a motor assembly and auxiliary wind wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If waste gas is directly discharged from the parking heater through the waste gas pipeline, then the structure is simple, but energy is wasted due to high temperature waste gas (400-500 degrees)
Solution Approach 1:
The patent converts the harmful high-temperature waste gas into a useful heating resource by routing it through the waste gas pipeline that contacts the cylinder block, allowing the waste heat to preheat the air entering the combustion chamber and reducing overall energy loss
Solution Approach 2:
The waste gas pipeline is designed to preheat the air before it enters the combustion chamber by contacting the hot waste gas, preparing the air in advance for more efficient combustion and reducing the energy needed to reach operating temperature
2Productivity
If the fuel pipeline is continuously molded around the combustion cylinder, then heating efficiency is improved, but manufacturing complexity increases
Solution Approach 1:
The fuel pipeline is designed with a curved, continuous molded structure around the combustion cylinder, which increases the contact surface area between the fuel pipeline and the combustion chamber, improving heat transfer efficiency while maintaining a compact design
3Use of energy by stationary object
If the waste gas pipeline extends to the air inlet end and is formed around the air inlet channel, then energy utilization is improved, but device complexity increases
Solution Approach 1:
The waste gas pipeline is nested around the air inlet channel, with the waste gas pipeline forming a protective and heating envelope around the air inlet. This nested configuration allows the waste heat to directly contact and preheat the incoming air without requiring separate heating components
Solution Approach 2:
The waste gas pipeline serves multiple functions: it channels the waste gas away from the combustion chamber, uses the waste heat to preheat the incoming air, and provides structural support for the air inlet assembly, reducing the need for additional separate components
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
Improves energy utilization by recycling waste heat, resulting in faster and more efficient heating with reduced fuel consumption.
Implementation Method 1
the waste gas pipeline extends to the air inlet end and is continuously formed around an air inlet channel of the air inlet end
Implementation Method 2
After the gas enters the parking heater from the air inlet pipe for combustion
Data Source
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AI summary
A parking heater with a high energy utilization rate comprises a shell and a combustion device; the shell comprises an air inlet end, an air outlet end and an air flow channel penetrating the air inlet end and the air outlet end; the combustion device comprises a cylinder block, wherein the cylinder block comprises a combustion chamber, a fuel pipeline, a waste gas pipeline, an input end and an output end, wherein the fuel pipeline is communicated with the combustion chamber, and the output end is communicated with the waste gas pipeline; wherein, the combustion chamber comprises a combustion cylinder, the combustion cylinder has a cylindrical structure varying in axial diameters, the fuel pipeline is continuously molded around the cylindrical structure of the combustion cylinder; wherein, the waste gas pipeline extends to the air inlet end and is continuously formed around an air inlet channel of the air inlet end.