Vehicle Blower Auxiliary Door for Heating Performance
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Solution Overview
Problem
Existing vehicle blowers require excessive driving power for heating in winter and suffer from reduced heating performance due to the complexity of components and limited applicability of indoor air introduction in outdoor air inflow mode, especially with dome-type or other types of indoor and outdoor air switching doors.
Innovation Solution
A blower design featuring an indoor air inflow opening on the filter cover with an auxiliary door that opens and closes to introduce indoor air in outdoor air inflow mode, regardless of the switching door type, and includes an extension portion for compact size and easy installation, along with a drain hole to prevent water stagnation and a filter configuration to prevent whistle-like noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If outdoor air is introduced through the outdoor air inlet in outdoor air inflow mode, then the vehicle interior can be kept fresh and frost on windows can be prevented, but the heating performance deteriorates because only cold outdoor air is introduced
Solution Approach 1:
The air inlet system is segmented into multiple paths: the main outdoor air inlet (22) and an auxiliary indoor air inlet (21a) formed on the filter cover (24). This segmentation allows selective introduction of outdoor air for frost prevention while simultaneously introducing indoor air for heating improvement, resolving the contradiction between preventing frost and maintaining heating performance
Solution Approach 2:
The filter cover (24) serves as an intermediary component that houses both the air filter (25) and the auxiliary indoor air inlet (21a). This intermediary structure enables the dual function of filtering outdoor air while also providing a pathway for indoor air introduction, thereby improving heating performance without compromising the primary outdoor air introduction function
2Temperature
If an auxiliary door is formed on the upper end portion of the filter cover to open and close an indoor air inlet, then heating performance is improved by allowing indoor air to flow therein, but the device complexity increases
Solution Approach 1:
The auxiliary door (21b) is merged with the filter cover (24) structure, and the indoor air inlet (21a) is integrated into the same component. This merging approach combines the functions of air filtration, indoor air introduction, and door actuation into a single integrated assembly, thereby improving heating performance while minimizing the increase in device complexity
Solution Approach 2:
The filter cover (24) is designed with multi-functionality: it houses the air filter (25), provides the auxiliary indoor air inlet (21a), and supports the auxiliary door (21b). This universal design allows a single component to perform multiple functions, reducing the need for additional separate parts and thereby limiting the increase in device complexity while achieving improved heating performance
3Ease of operation
If the air filter is spaced apart from the auxiliary door by a predetermined interval, then the auxiliary door can freely move and indoor air can be introduced, but the manufacturing precision requirements increase
Solution Approach 1:
The extension portion (24a) is provided locally on the filter cover (24) to create a specific spaced relationship between the air filter (25) and the auxiliary door (21b). This local structural modification provides the necessary clearance for auxiliary door movement while maintaining precise positioning only where needed, thereby achieving ease of operation without excessively increasing overall manufacturing precision requirements
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 heating performance by mixing indoor and outdoor air, reduces manufacturing costs and complexity, and ensures effective air flow regardless of the switching door type, while preventing bad smells and whistle-like noises.
Implementation Method 1
the auxiliary door 70 is usually in a state to close the auxiliary passageway 71 by self-weight, but actuated to open the auxiliary passageway 71 by a negative pressure (pressure difference) generated by an actuation of the blower fan
Implementation Method 2
a blower fan 35 for forcedly blowing the indoor air and the outdoor air toward an inlet 43 of an air-conditioning case 40
Implementation Method 3
an air filter 25 detachably mounted between the intake duct 20 and the scroll case 30 and having a filter portion 26 for filtering impurities in the introduced air
Implementation Method 4
the air-conditioning case 40 in which an evaporator 41 and a heater core 42 are mounted in order in such manner as to be spaced apart from each other by a predetermined interval
Implementation Method 5
the air-conditioning case 40 in which an evaporator 41 and a heater core 42 are mounted in order in such manner as to be spaced apart from each other by a predetermined interval
Data Source
AI summary
The present invention relates to a blower for a vehicle, which has an auxiliary door formed on the upper end portion of a filter cover to open and close an indoor air inlet, thereby improving a heating performance by allowing some of the indoor air to flow therein in an outdoor air inflow mode regardless of a type of an indoor and outdoor air switching door, improving productivity and reducing manufacturing costs.