Washer-Dryer Reverse Airflow System for Front-Accessible Lint Filter
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Solution Overview
Problem
Current combination washers/dryers have airflow systems that make it difficult or impossible for consumers to access and maintain the lint filter, as the drying air is directed from the rear to the front, prohibiting a consumer-accessible lint filter design and complicating servicing.
Innovation Solution
A reverse drying air system that pulls air from the bellows or door glass and pushes it into the clothes load through the rear panel of the drum, allowing a lint filter to be positioned at the front of the machine, accessible to the user, with a duct system and blower that draws in air and directs it through apertures in the rear panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the drying air is moved from the rear of the tub towards the front of the tub and into the front of the drum, then the airflow system can be simplified, but the lint filter becomes inaccessible to consumers for routine maintenance
Solution Approach 1:
The patent reverses the conventional airflow direction by drawing air from the front of the tub (near the door) and directing it toward the rear, rather than the traditional rear-to-front flow. This inversion allows the lint filter to be positioned at the front where it is easily accessible to users for routine maintenance, while still achieving effective drying of the laundry load
2Device complexity
If the drying air is moved from the rear of the tub towards the front of the tub, then airflow can be simplified, but servicing of the lint filter or condenser becomes extremely difficult or impossible
Solution Approach 1:
By inverting the airflow direction to draw air from the front and direct it rearward, the patent positions the lint filter at the front of the machine where it can be easily accessed and serviced by consumers or technicians, eliminating the previous design flaw where the filter was buried in the rear and difficult or impossible to service
3Ease of operation
If a lint filter is positioned at the front for user accessibility, then ease of maintenance is improved, but the airflow system requires a reverse direction design
Solution Approach 1:
The patent implements a reverse airflow system that draws air from the front of the tub near the door and directs it toward the rear, allowing the lint filter to be positioned at the front for easy user access. This design choice prioritizes user convenience and maintenance accessibility, with the reversed airflow path enabling the filter to be located in the optimal position for user interaction
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
Enables user-accessible lint filter maintenance and easier servicing by reversing the airflow direction, similar to traditional dryers, improving user convenience and maintenance accessibility.
Implementation Method 1
The blower pulls in air into the combination washer/dryer at the front of the tub
Implementation Method 2
The heating circuit includes a blower, a heater and duct system
Implementation Method 3
A lint filter is coupled with the heating circuit and positioned adjacent the front of the tub
Data Source
AI summary
A combination washer/dryer including a tub. A heating circuit is positioned adjacent the tub. The heating circuit draws in drying air from adjacent the front end of the tub. The heating circuit has a duct system. The duct system moves drying air from an area adjacent the front of the tub to a rear end of the tub to enable the drying air to enter a rear end of a drum.