Clothes dryer having liquid injection nozzle
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Solution Overview
Problem
Existing clothes dryers lack an effective mechanism to independently control the rotation of the drum and blow fan when injecting liquid, leading to inefficient deposition of fragrance on clothes and increased filter clogging, resulting in performance degradation.
Innovation Solution
A clothes dryer design with a two-motor system allowing independent control of the drum and blow fan, featuring a nozzle with a concaved outlet and specific installation angles to prevent liquid discharge through the filter, ensuring effective fragrance deposition and minimizing losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single driving motor is used to drive both the drum and blow fan, then the device complexity is reduced, but the ability to independently control drum and fan rotation is lost, leading to inefficient liquid deposition
Solution Approach 1:
The single driving motor system is segmented into two independent motors: one motor drives the drum rotation, and another motor drives the blow fan. This segmentation allows independent control of each component, enabling the drum and fan to rotate at different speeds and directions, which is essential for effective liquid deposition onto clothes during the fragrance addition cycle.
2Device complexity
If the outlet is positioned within the injection region, then the structure is simplified, but liquid is discharged through the outlet instead of depositing on clothes, causing fragrance loss and filter clogging
Solution Approach 1:
The outlet is deliberately positioned outside the injection region in advance, creating a spatial separation between the liquid injection zone and the air discharge path. This preliminary positioning prevents liquid from being discharged through the outlet before it can evaporate and deposit on the clothes, thereby avoiding fragrance material loss and preventing filter clogging from liquid residues.
3Adaptability or versatility
If liquid is injected into the drum, then fragrance deposition function is added, but liquid may flow toward the filter and cause performance degradation
Solution Approach 1:
The problem is solved by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial configuration. The outlet is positioned in a different spatial zone (outside the injection region) rather than simply rearranging components in the same plane. This dimensional separation ensures that liquid injected into the drum cannot reach the filter through the outlet path, maintaining filter performance while enabling fragrance addition functionality.
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 enables efficient fragrance deposition on clothes without filter clogging, maintaining dryer performance by delaying liquid discharge and optimizing the injection angle and nozzle design.
Implementation Method 1
a nozzle (500) installed at the rear surface of the drum and injecting liquid into the drum in an injection region
Implementation Method 2
the injected fragrance into the drum is discharged via a filter disposed at a lower side of a front surface of the drum, the ingredients remaining at the filter after the fragrance is completely evaporated
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
Disclosed is a clothes dryer including a cabinet (102), a drum (120) rotatably installed in the cabinet, an inlet (130) disposed at an upper side of a rear surface of the drum, and allowing air to be introduced therethrough, an outlet (185) disposed at a lower side of a front surface of the drum, and allowing air to be discharged out therethrough, and a nozzle (500) installed at the rear surface of the drum and configured to inject liquid, wherein an injection region of the nozzle is present below a line connecting the nozzle and the outlet, whereby the outlet of air discharged out of the drum is not present within the injection regions in which the liquid is injected via the nozzle, so as to prevent the liquid injected via the nozzle (500) from being discharged out of the outlet (185) and also overcome a problem occurred due to remnant ingredients of the injected liquid remaining on a filter (180) located at the outlet of the drum (120).