Rotary Drum Dryer Rear Wall Integration for Simpler Assembly
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Solution Overview
Problem
Current rotary-drum home laundry dryers have complex structures that increase production costs and assembly complexity, particularly in the rear wall design.
Innovation Solution
The rotary-drum laundry dryer features a rear wall with a plastic supporting bulkhead and roller bosses made of plastic, integrated with a lower supporting basement, simplifying the structure and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If multiple separate components (bulkhead, roller bosses, basement) are used in the rear wall structure, then structural strength and functionality are improved, but device complexity and production cost increase
Solution Approach 1:
The patent combines the bulkhead, roller bosses, and basement into a single integrated rear wall structure made of plastic material. This merging eliminates the need for multiple separate metal components and their associated fasteners, thereby reducing assembly complexity while maintaining structural integrity through the unified design.
Solution Approach 2:
The integrated plastic rear wall structure performs multiple functions simultaneously: it serves as the bulkhead for structural support, provides mounting bosses for roller support, and forms part of the basement structure. This multi-functionality reduces the overall component count and simplifies the device while maintaining all necessary structural functions.
2Reliability
If multiple separate components are used in the rear wall structure, then functional requirements are met, but manufacturing cost and assembly time increase
Solution Approach 1:
The patent integrates multiple functional components into a single molded plastic part, eliminating the need for separate manufacturing processes for each component and their associated fastening operations. This single-part construction reduces manufacturing steps, lowers production costs, and simplifies assembly while maintaining all required functional performances.
Solution Approach 2:
The patent transitions from metal materials to plastic material for the rear wall structure, changing the material parameter to enable integration of multiple functions into a single molded part. This material parameter change facilitates cost-effective manufacturing through injection molding while meeting all functional requirements for structural support and roller mounting.
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 design reduces production costs and simplifies assembly while maintaining effective air circulation and laundry drying performance.
Implementation Method 1
an open-circuit or closed-circuit, hot-air generator which is housed inside the casing and is structured to circulate inside the rotatable drum a stream of hot air which has a very low moisture content and flows through the rotatable drum and over the laundry inside the drum to rapidly dry the laundry
Implementation Method 2
the rear wall of dryer comprises a supporting bulkhead made of plastic material; at least one supporting boss of a drum supporting roller being also made of plastic material and carried out in one piece with said supporting bulkhead
Implementation Method 3
To avoid air leakages from the two axial ends of the tubular body, a first circular sealing gasket is generally interposed between the front rim of the tubular body and the front wall of the casing, whereas a second circular sealing gasket is generally interposed between the rear rim of the tubular body and the rear wall of the appliance casing
Data Source
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AI summary
A rotary-drum laundry dryer (1) comprising a revolving drum (3) structured for housing the laundry to be dried, a hot-air generator (6) structured to supply a stream of hot air through said revolving drum (3), and a lower supporting base (11) which is structured for resting on the floor and for housing at least part of the hot-air generator (6). The hot-air generator (6) in turn comprises an air conduit; and air circulating means which are located along the air conduit and are structured to produce, inside the air g conduit, an airflow (f) which flows through the revolving drum (3) and over the laundry inside the drum (3). The rotary-drum laundry dryer (1) is characterized in that its rear wall (2b) comprises a supporting bulkhead (14a) made of plastic material; at least one supporting boss (155) of a drum supporting roller (8) being also made of plastic material and carried out in one piece with the supporting bulkhead (14a); and at least one supporting boss (155a) of a supporting roller (8) being carried out in one piece with a lower supporting basement or socle (11).