Yarn Heating Apparatus Air Recirculation
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Solution Overview
Problem
The existing yarn heating apparatuses experience increased power consumption due to air flow-related temperature decreases within the thermal insulation space, as cool air enters and warm air escapes, especially when the number of yarns increases or their speed rises.
Innovation Solution
The apparatus incorporates a connecting space with partitions and a heat transfer unit to recirculate warm air from the exit side to the entrance side, reducing heat loss and maintaining temperature within the thermal insulation space, and utilizes an air blower to guide warm air back into the space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If yarns run at high speed or in large numbers, then productivity is improved, but power consumption increases due to increased accompanied flow causing more cool air to enter and warm air to escape
Solution Approach 1:
The thermal insulation box is divided into multiple independent thermal insulation spaces, each handling specific yarn paths. This segmentation prevents cool air from entering all spaces when yarns move through any single space, as each space has its own controlled environment and air flow management system.
Solution Approach 2:
Different regions within the thermal insulation box are designed with different air flow characteristics. The yarn entrance and exit regions have different pressure and temperature conditions, creating localized air flow patterns that prevent overall cool air infiltration while maintaining high productivity.
2Ease of operation
If slits are formed on the outer walls for yarn passage, then ease of operation is improved, but temperature stability deteriorates due to cool air entering and warm air escaping through the slits
Solution Approach 1:
The single large thermal insulation space is divided into multiple smaller thermal insulation spaces, each with its own temperature control. This allows yarn to pass through slits in one space without causing temperature instability in other spaces, maintaining overall temperature stability while enabling easy yarn operation.
Solution Approach 2:
The divided thermal insulation spaces act as intermediaries between the external environment and the yarn processing area. Each space independently manages its air flow and temperature, preventing direct thermal exchange between the outside cool air and the internal processing environment.
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 significantly reduces power consumption by minimizing heat loss and maintaining the temperature within the thermal insulation space, thereby efficiently heating the yarns.
Implementation Method 1
heating the yarns to suitable temperatures
Implementation Method 2
box (thermal insulation box), to restrain the heat generated by the heater of the godet roller from escaping to the outside from the space
Implementation Method 3
air blower which feeds wind from the yarn exit side toward the yarn entrance side
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a thermal insulation box 13, above a thermal insulation space 21 in which a godet roller 11 and a separate roller 12 each having a heater 15 are provided, a connecting space 22 separated from a thermal insulation space 21 by a wall 23 is provided. Yarns Y spun out from a spinning machine enter the thermal insulation space 21 after passing through a slit 25a at an upper wall 13b of the thermal insulation box 13, the connecting space 22, and a slit 24a on the wall 23, reciprocate between the rollers 11 and 12 plural times, and then go out from the thermal insulation space 21 to the outside of the thermal insulation box 13 through a slit 24b of the wall 23, the connecting space 22, and a slit 25b of the upper wall 13b. In so doing, an accompanied flow generated around the running yarns Y causes a part of air having flown out from the thermal insulation space 21 through the slit 24b to return to the thermal insulation space 21 through the connecting space 22 and the slit 24a.