Dehumidizer
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Solution Overview
Problem
Conventional dehumidifiers have a large volume and high energy consumption due to longer air passages, which limit heat exchange efficiency and dehumidization effectiveness, and are restricted by a maximum working temperature of 40° C.
Innovation Solution
A dehumidifier design featuring separate upper and lower air passages with a rotary heat storage device, evaporator, condenser, and fan, where the rotary heat storage device is driven by a motor and coupled with a chain, allowing for improved heat exchange and reduced thermal exchanger area, enabling higher working temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air passage is extended to improve heat exchange efficiency and dehumidization rate, then the dehumidization performance is improved, but the volume of the dehumidizer increases and energy consumption increases
Solution Approach 1:
The air passage is divided into upper and lower separate passages, with the rotary heat storage device spanning both passages. This segmentation allows the system to achieve extended heat exchange effectiveness without proportionally increasing the overall device volume, as the two passages are arranged in parallel rather than requiring a single long sequential passage.
Solution Approach 2:
The rotary heat storage device is positioned to extend across both upper and lower air passages in the vertical dimension, utilizing three-dimensional space more efficiently. This allows heat exchange to occur across multiple spatial dimensions simultaneously, achieving the effect of a longer air passage without increasing the horizontal footprint or overall volume proportionally.
2Productivity
If the air passage is extended to improve heat exchange efficiency, then the dehumidization rate increases, but the working power increases causing energy waste
Solution Approach 1:
The rotary heat storage device performs periodic rotation, alternately exposing different portions of its heat storage surface to the air flow in the upper and lower passages. This periodic action enables continuous heat exchange without requiring the entire device to operate at maximum capacity simultaneously, thereby improving heat exchange efficiency while reducing peak power consumption and energy waste.
3Temperature
If the maximum working temperature is increased above 40°C, then the dehumidizer can operate in higher temperature environments, but the temperature of the whole dehumidizer rises and the heat exchange effect deteriorates due to longer air passage
Solution Approach 1:
By segmenting the air passage into upper and lower separate passages with the rotary heat storage device positioned between them, the system reduces the effective path length air must travel in each individual passage. This segmentation prevents excessive temperature rise along the air passage even at higher operating temperatures, maintaining effective heat exchange and dehumidization performance above 40°C.
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 design results in improved dehumidification performance, reduced energy consumption, and increased maximum working temperature from 40° C to 55° C, with a 30% reduction in thermal exchanger area and compressor capacity, leading to a more compact and efficient dehumidification process.
Implementation Method 1
a rotary heat storage device, an evaporator, a condenser
Implementation Method 2
The upper end of the rotary heat storage device is disposed in the upper air passage, and the lower end of the rotary heat storage device is disposed in the lower air passage
Implementation Method 3
the evaporator, the condenser, and the fan are installed sequentially from left to right into the lower air passage
Implementation Method 4
the water in air is condensed into water droplets
Data Source
AI summary
A dehumidizer includes an upper air passage, a lower air passage, a rotary heat storage device, an evaporator, a condenser, a motor, and a fan. The upper air passage and the lower air passage are separated by a partition, and the right end of the upper air passage has an air inlet, and the right end of the lower air passage has an air outlet, and the left end of the upper air passage and the left end of the lower air passage are communicated with each other. The upper end of the rotary heat storage device is disposed in the upper air passage, and the lower end of the rotary heat storage device is disposed in the lower air passage, and the motor drives the rotary heat storage device to rotate. The evaporator, condenser and fan are installed sequentially from left to right into the lower air passage.