Vehicle Purification Heater Element Regeneration Control
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Solution Overview
Problem
The existing vehicle compartment purification systems face challenges in efficiently regenerating functional materials, particularly near the inlet side of the heater element, leading to low regeneration efficiency and ineffective utilization of catalysts, which affects the overall cost performance and energy efficiency.
Innovation Solution
A vehicle compartment purification system with a honeycomb structure heater element incorporating a functional material-containing layer, where the air flow velocity is controlled in two distinct regeneration steps to ensure effective heating and regeneration of the functional material, enhancing regeneration efficiency and catalyst activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the functional material-containing layer is provided on the surface of the partition walls near the inlet side, then the heating area is increased, but the temperature rise near the inlet side is insufficient due to cold air flow, resulting in low regeneration efficiency
Solution Approach 1:
The partition walls are divided into two distinct regions: a first region near the inlet side without functional material and a second region away from the inlet side with functional material-containing layer. This segmentation allows the cold air inlet region to remain free of functional material that would otherwise be ineffective, while preserving the functional material on warmer regions for effective regeneration.
Solution Approach 2:
Different regions of the partition walls are assigned different properties: the first region (inlet side) has no functional material due to insufficient heating, while the second region (away from inlet) has functional material-containing layer where adequate temperature rise occurs. This local differentiation optimizes the overall regeneration efficiency by placing functional material only where it can be effective.
2Speed
If the initial resistance is set low to increase the heating rate, then the temperature can be raised in a short time, but excessive heat generation may occur, causing thermal deterioration of the functional material
Solution Approach 1:
The partition walls are pre-designed with PTC characteristics and appropriate initial resistance values that enable controlled rapid heating. The specific resistance range (0.01-0.1 Ω·m) is predetermined to achieve optimal heating rate while preventing excessive temperature rise that would damage the functional material.
Solution Approach 2:
The electrical resistance parameter of the partition walls is specifically optimized to balance heating rate and temperature control. By selecting resistance values in the range of 0.01-0.1 Ω·m, the system achieves fast heating while the PTC characteristics automatically limit excessive temperature rise, preventing functional material deterioration.
3Productivity
If air is flowed through the cells at high velocity, then the regeneration process is accelerated, but the temperature rise near the inlet side is further reduced, worsening the regeneration efficiency
Solution Approach 1:
The partition walls are segmented into a first region without functional material (where high velocity cold air flows) and a second region with functional material (where lower velocity and adequate temperature occur). This segmentation allows high air velocity to be maintained for productivity while preventing functional material placement in regions where temperature is insufficient.
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 system improves the regeneration efficiency of the functional material and catalysts, ensuring effective utilization and reducing energy losses, thereby enhancing the overall performance and cost-effectiveness of the vehicle compartment purification process.
Implementation Method 1
at least the partition walls are made of a material having PTC characteristics
Implementation Method 2
captures components to be removed such as water vapor and CO2 in the air of a vehicle compartment with a functional material such as an adsorbent
Implementation Method 3
desorbing the substance adsorbed on the functional material to discharge the substance
Data Source
AI summary
A vehicle compartment purification system configured to be capable of executing a regeneration mode of a functional material by a controller, the regeneration mode including a first regeneration step in which the air is flowed through a plurality of cells of a heater element at a flow velocity A for a predetermined time from a start of the regeneration mode, and after the first regeneration step, a second regeneration step in which the air is flowed through the plurality of cells at a flow velocity B and flowed out to the outflow piping; wherein the flow velocity A and the flow velocity B satisfy the flow velocity A<the flow velocity B, provided that a direction from a first end surface to a second end surface of the heater element is regarded as a positive direction, and the flow velocity B is a positive value.