Dryer Drum Drive Layout for Vibration and Noise Reduction
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Solution Overview
Problem
Conventional dryers face issues with vibration and noise due to the deformation of thin rear panels when the driving unit is fixed to the rear surface, leading to misalignment of rotating components and reduced reliability, and they lack efficient space utilization and control box installation, resulting in decreased drying efficiency and increased noise.
Innovation Solution
A laundry treating apparatus with a motor disposed behind the drum, a reducer fixed to the rear surface of a rear plate, and a control box installed on the base adjacent to the side panel, allowing concentric rotation of the rotor and drum, efficient space use, and reduced connection wire lengths to minimize noise and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the driving unit is fixed to the rear surface of the cabinet, then the drum can be rotated, but the thin rear panel deforms and vibrates under load, causing misalignment of rotating components
Solution Approach 1:
The cabinet structure is divided into a rear panel and a separate reinforcement structure. The reinforcement structure acts as an independent load-bearing component that segments the functional requirements (supporting the driving unit) from the cosmetic requirements (maintaining rear panel appearance), thereby preventing deformation and misalignment while enabling drum rotation.
Solution Approach 2:
A reinforcement structure is introduced as an intermediary element between the driving unit and the rear panel. This mediator absorbs and distributes the mechanical loads and vibrations, preventing direct transmission to the thin rear panel and maintaining proper alignment of rotating components without interfering with drum rotation.
2Ease of operation
If the driving unit is fixed to the rear surface of the cabinet, then the drum can be rotated, but vibration and noise increase due to panel deformation
Solution Approach 1:
The reinforcement structure serves as a pre-installed cushioning element that anticipates and mitigates vibration and noise before they propagate. By providing structural support in advance, it prevents the rear panel from deforming under operational loads, thereby reducing vibration and noise generation during drum rotation.
Solution Approach 2:
The reinforcement structure acts as a mediator that isolates the source of vibration (driving unit) from the panel that amplifies noise (rear panel). This intermediary absorbs and dampens mechanical vibrations, preventing their transmission to the cabinet exterior and reducing noise emission.
3Area of stationary object
If the control box is installed on the base, then space is utilized efficiently, but connection wire length increases causing noise
Solution Approach 1:
The control box is positioned in a specific location on the base that optimizes the balance between space utilization and electrical performance. By selecting a location closer to other electrical components, the design maintains efficient use of available space while minimizing connection wire lengths and associated electrical noise through localized placement.
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 solution reduces vibration and noise, improves drying efficiency by ensuring concentric rotation, and allows for effective control box cooling and maintenance, increasing the reliability and usability of the apparatus.
Implementation Method 1
a motor configured to provide power to rotate the drum
Implementation Method 2
a heat exchange unit including a first heat exchanger placed on the base so as to condense the moisture in the air
Implementation Method 3
a first heat exchanger placed on the base so as to condense the moisture in the air
Implementation Method 4
a second heat exchanger placed on the base so as to heat the air
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
Disclosed is a laundry treating apparatus comprising: a cabinet (100); a drum (200) rotatably provided in the cabinet (100) so as to accommodate laundry; a base (800) disposed below the drum (200) adapted to provide a space configured such that air in the drum (200) is circulated therein or moisture in the air is condensed therein; a motor (500) configured to provide power to rotate the drum (200); a heat exchange unit (900) comprising a first heat exchanger (910) placed on the base (800) configured to condense the moisture in the air, a second heat exchanger (920) placed on the base (800) configured to heat the air, and a compressor (930) configured to supply a refrigerant for exchange of heat with the air to the first heat exchanger (910) or the second heat exchanger (920); and a control box (190) comprising a blower fan configured to draw in the air in the drum (200) and to resupply the air to the drum (200), and a PCB configured to control operation of the motor (500), the compressor (930) or the blower fan and to supply power, wherein: the motor (500) is disposed behind the drum (200) so as to be separated from and spaced apart from the base (800); and the base (800) comprises: a circulation flow path part (820) formed on one side of the base (800) adapted to communicate with the drum (200), configured to circulate the air in the drum (200), and provided with the first heat exchanger (910) and the second heat exchanger (920) disposed therein; and a control box installation part (813) provided on a remaining side of the base (800) in a lateral direction of a flow path, and configured such that the control box (190) is mounted in the control box installation part (813).