Laundry dryer with fan
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Solution Overview
Problem
Existing laundry dryers face challenges in effectively cooling critical components without increasing size or cost, as traditional heat insulation pads are inadequate and dedicated fans for cooling purposes are undesirable due to space and cost concerns.
Innovation Solution
A modified fan design incorporating a secondary air channel between the fan housing and cover, which introduces ambient air to cool both the fan motor and nearby components like the detergent adding apparatus, while maintaining the primary air channel's original function without significant modifications or additional space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a dedicated fan is provided for cooling purposes inside the dryer body, then cooling effectiveness is improved, but device complexity and cost increase
Solution Approach 1:
The patent applies multi-functionality by enabling the existing fan to perform both its original air circulation function and an additional cooling function. The fan is equipped with both a primary air channel for its original purpose and a secondary air channel for cooling the motor and nearby components, allowing one component to serve multiple purposes without adding a separate dedicated cooling fan.
Solution Approach 2:
The patent merges the cooling function with the existing fan structure by integrating a secondary air channel into the fan housing. This combines the air circulation system and cooling system into a single integrated component, eliminating the need for a separate dedicated cooling fan and reducing overall device complexity.
2Temperature
If a dedicated fan is provided for cooling purposes, then cooling effectiveness is improved, but the size and cost of the dryer increase
Solution Approach 1:
The existing fan is made multi-functional to perform both air circulation and cooling tasks, eliminating the need for an additional dedicated cooling fan that would increase the dryer's volume. The same physical fan handles multiple functions, maintaining compact size.
Solution Approach 2:
The cooling air channel is merged with the existing fan housing structure, utilizing the available space within the fan assembly rather than adding separate cooling components that would increase the overall dryer volume.
3Temperature
If heat insulation pads are provided, then heat insulation is improved, but cooling effectiveness and applicability to all parts are insufficient
Solution Approach 1:
The patent replaces passive heat insulation pads with an active cooling system using the fan and secondary air channel. Instead of merely insulating hot parts, the system actively circulates air to remove heat from the motor and nearby components, providing effective cooling where insulation pads are inadequate or inapplicable.
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 solution provides effective cooling to critical components without altering the original fan function or performance, reducing costs and space requirements, while ensuring efficient heat management and maintaining the integrity of the detergent's chemical performance.
Implementation Method 1
impellers rotating with a rotator of a motor are provided in the secondary air channel, the impellers are disposed such that when the impellers rotate with the rotator, air is driven to enter the secondary air channel from the inlet of the secondary air channel and exit from the outlet of the secondary air channel
Implementation Method 2
when flowing through the secondary air channel, the air further cools the motor of the fan itself
Data Source
Figure 1
Figure 2
AI summary
Disclosed is a laundry dryer (100) with a fan (6), including a cabinet (1) and a drying chamber (2), and the fan (6) having a primary air channel (11) formed by a housing (10), where the housing (10) is covered by a cover (12) outside, a secondary air channel (15) having an inlet (13) and an outlet (14) is formed between the cover (12) and the housing (10), impellers (62) rotating with a rotator (61) of a motor are provided in the secondary air channel (15), the impellers (62) are such disposed that when the impellers (62) rotate with the rotator (61), air is driven to enter the secondary air channel (15) from the inlet (13) of the secondary air channel (15) and exit from the outlet (14) of the secondary air channel (15), the inlet (13) and the outlet (14) of the secondary air channel (15) respectively extend by using a first pipe (16) and a second pipe (17), and an outlet (14) of the second pipe (17) is close to an apparatus that needs to be cooled in the cabinet (1). In this way, the secondary air channel (15) can guide an airflow to the apparatus that needs to be cooled, and when flowing through the secondary air channel (15), the air further cools the motor of the fan (6) itself.