Dryer Condensing Medium Control Based on Outlet Air Temperature Timing
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Solution Overview
Problem
Conventional dryers waste resources by maintaining constant power usage in the condensing device, which is not efficiently regulated due to indirect temperature changes of the condensing medium and insensitivity to fabric humidity, leading to inadequate condensation and increased energy costs.
Innovation Solution
A method that detects air temperature at the dryer's outlet, calculates the time to reach a set temperature, and adjusts the tempo of condensing medium supply based on this time value, dividing the supply into stages with varying durations and intervals according to the changing rate of air temperature, ensuring efficient condensation medium usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the power of the condensing device is kept constant during the whole working process, then the device operation is simple, but the power is wasted and resources are consumed unnecessarily
Solution Approach 1:
The condensing device power is changed from constant to dynamic regulation. The control device adjusts the power of the condensing device in real-time based on the air temperature detected at the barrel outlet, making the system adaptive to changing drying conditions and eliminating energy waste while maintaining operational simplicity through automated control.
Solution Approach 2:
A feedback control system is implemented where the control device continuously monitors the air temperature at the barrel outlet and uses this information to regulate the condensing device power. This closed-loop control ensures the condensing device operates at the optimal power level for each drying stage, preventing both energy waste and inadequate condensation.
2Ease of operation
If the tempo of supplying condensing medium is regulated according to the temperature of condensing medium, then the control is simplified, but the temperature change is indirect and not sensitive enough to reflect the drying process accurately
Solution Approach 1:
The air temperature at the barrel outlet is used as an intermediary parameter to indirectly regulate the condensing medium supply tempo. Although this is an indirect measurement, it accurately reflects the drying process state because the outlet air temperature directly correlates with fabric moisture content and drying progress, providing a reliable control signal without requiring direct fabric temperature measurement.
3Device complexity
If water supply for condensing is controlled in fixed time cycles, then the control system is simple, but the supply does not account for fabric humidity variations leading to inadequate condensation
Solution Approach 1:
The condensing medium supply tempo is changed from fixed time cycles to dynamic regulation based on real-time air temperature detection. The control device adjusts the water supply rate and timing according to the detected outlet air temperature, ensuring adequate condensation adapts to fabric humidity variations while maintaining reasonable control system complexity through automated temperature-based regulation.
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 approach optimizes the amount of condensing medium supplied in real-time, enhancing drying efficiency and preventing resource wastage by aligning the condensing medium supply with the changing air temperature and fabric moisture content.
Implementation Method 1
In the condensing device, the process air exchanges heat with a condensing medium at a lower temperature and the moisture therein is condensed and separated from the process air
Implementation Method 2
the moisture therein is condensed and separated from the process air
Implementation Method 3
Process air is heated to meet the moist fabric in the barrel, evaporating moisture from the fabric
Data Source
AI summary
A method for regulating a quantity of a condensing medium according to change in air temperature at an outlet of a barrel of the dryer comprises the following steps: Step 1, Starting drying, detecting an air temperature at the outlet of a barrel of a dryer, and determining that the air temperature at the outlet of the barrel reaches a set temperature; Step 2, calculating the time value from the start of drying to the temperature at the outlet of the barrel reaching the set temperature; Step 3, determining the supplying tempo of the condensing medium at least according to the time value calculated in step 2; and Step 4, supplying the condensing medium with the supplying tempo of the condensing medium determined in step 3.