Laundry drying machine
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Solution Overview
Problem
Conventional laundry drying machines face issues such as low drying efficiency, local overheating, and damage due to uneven heating, as well as the need for separate tuners and high propagation loss when using RF electromagnetic waves for drying.
Innovation Solution
A laundry drying machine with a probe disposed on the central axis of the drum to uniformly radiate electromagnetic waves, utilizing a waveguide to minimize propagation loss and prevent overheating, and incorporating a probe cover to protect the probe from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If microwave is radiated into the subject to be dried containing moisture using an antenna in the washing tub, then it is possible to solve the problem of wrinkling due to the difference in drying speed, but the antenna is frequently invaded and the resonant area of the subject to be dried is narrow resulting in low drying efficiency
Solution Approach 1:
The patent transitions from a conventional antenna positioned in the washing tub to a probe antenna that penetrates through the drum bottom into the drum interior. This spatial repositioning in the vertical dimension allows the antenna to be directly exposed to the subject to be dried, significantly enlarging the resonant area and improving drying efficiency while avoiding invasion by the subject.
Solution Approach 2:
The patent introduces a probe structure as an intermediary component that bridges the gap between the microwave generation system and the subject to be dried. The probe antenna, positioned through the drum bottom, serves as an effective mediator to radiate microwave directly onto the subject, solving both the wrinkling prevention and drying efficiency enhancement simultaneously.
2Reliability
If the antenna is not directly exposed to the inner space of the washing tub, then the antenna is protected from invasion, but the resonant area of the subject to be dried is narrow and the drying efficiency is low
Solution Approach 1:
The patent repositions the antenna from a horizontal position within the washing tub to a vertical position penetrating through the drum bottom. This dimensional change allows the antenna to be directly exposed to the subject to be dried in the drum interior, significantly enlarging the resonant area and improving drying efficiency while the drum bottom structure continues to protect the antenna from invasion.
3Device complexity
If electromagnetic wave is radiated from one axis rather than the inside of the drum, then the configuration is simplified, but the electromagnetic wave cannot be completely and evenly projected into the inner space of the drum resulting in low drying efficiency and power efficiency
Solution Approach 1:
The patent segments the electromagnetic wave radiation system into multiple probe antennas positioned at different locations through the drum bottom, rather than using a single central axis radiation source. This segmentation allows the electromagnetic wave to be projected more completely and evenly into the drum interior, improving drying efficiency and power efficiency while maintaining relative configuration simplicity.
4Duration of action of moving object
If hot air is supplied to the drum accommodating clothes to dry the clothes, then the drying time is greatly shortened and sterilizing and disinfecting is achieved, but higher heat is locally applied to the surface in contact with the hot air causing wrinkles and fabric damage
Solution Approach 1:
The patent replaces the conventional hot air convection drying method with a microwave dielectric heating system. By using electromagnetic waves to directly heat the moisture in the subject to be dried, the system achieves rapid drying with uniform heat distribution, eliminating the local overheating and surface damage problems associated with hot air drying while maintaining short drying times.
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 configuration enhances drying efficiency by enlarging the resonance area, minimizing propagation loss, and preventing local overheating, allowing continuous drum rotation without the need for separate tuners and protecting the probe from damage.
Implementation Method 1
dries a subject to be dried by supplying microwave to the inside of a washing tub... dries clothes by a dielectric heating method in which an electric field is applied to a dielectric material
Implementation Method 2
electrode part that forms an electric field to heat the subject to be dried... probe that is disposed in the inner space of the drum to radiate electromagnetic wave
Implementation Method 3
guide that has one side connected to the probe housing and the other side connected to the oscillator to transmit the electromagnetic wave to the probe
Data Source
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AI summary
The present invention relates to a laundry drying machine that heats and dries a subject to be dried by projecting RF electromagnetic wave onto the subject to be dried through a probe (450) disposed on a central axis inside a drum (200), and includes an oscillator (410), a probe (450) that is disposed in the inner space of the drum to radiate the electromagnetic wave, a guide (420) of hollow conductive waveguide that transmits the electromagnetic wave to the probe, and has an effect of improving drying efficiency by directly projecting the electromagnetic wave into the inner space of the drum through the probe disposed inside the drum to enlarge a resonance area of a subject to be dried and by transmitting high-power RF electromagnetic wave through the guide.