Sub-Zero Treatment Device Exhaust Positioning for Uniform Cooling
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Solution Overview
Problem
Conventional sub-zero treatment devices experience temperature irregularities and non-uniform cooling due to the external discharge of low-temperature nitrogen gas, leading to inefficient use of liquid refrigerant and fluctuations in cooling quality.
Innovation Solution
A sub-zero treatment device design featuring a cooling tank with a baffle member and an exhaust member that positions the exhaust port within the cooling target object mounting chamber, allowing for uniform gas distribution and reduced refrigerant usage by optimizing the exhaust port's placement and shape to minimize temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the exhaust port is provided on the side wall of the cooling tank to discharge low-temperature nitrogen gas externally, then the pressure inside the cooling tank can be maintained within a prescribed range, but temperature irregularities occur inside the cooling tank leading to non-uniform cooling
Solution Approach 1:
The exhaust port is repositioned from a lateral position on the side wall to a vertical position at the top surface of the lid. This dimensional change in exhaust port location alters the gas discharge trajectory and reduces the disruptive effect on temperature distribution within the cooling tank, thereby maintaining pressure control while improving temperature uniformity.
2Device complexity
If the exhaust port is positioned on the side wall, then the structure is simple, but low-temperature nitrogen gas may be exhausted before contributing to cooling, requiring large amounts of liquid refrigerant
Solution Approach 1:
The exhaust port is relocated from the side wall to the top surface of the lid, creating a vertical exhaust pathway. This positional change in the third dimension allows the exhaust system to discharge gas that has had sufficient time to contribute to cooling the treatment space, thereby reducing refrigerant consumption while maintaining structural simplicity.
3Strength
If liquid nitrogen is supplied to the cooling tank to cool the target object, then the hardness and toughness of the steel material are improved, but temperature irregularities cause fluctuations in cooling quality
Solution Approach 1:
The exhaust port is repositioned from the side wall to the top surface of the lid, which changes the gas flow dynamics within the cooling tank. This dimensional relocation prevents premature discharge of low-temperature nitrogen gas, ensuring more uniform temperature distribution throughout the cooling tank and consistent cooling quality for the steel material.
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 device achieves uniform cooling of the target object while reducing the amount of liquid refrigerant required, ensuring consistent quality and efficiency in the cooling process.
Implementation Method 1
The agitation fan 108 converts the liquid nitrogen to a mist and diffuses the mist through the interior of the cooling tank 102
Implementation Method 2
The agitation fan 108 converts the liquid nitrogen to a mist and diffuses the mist through the interior of the cooling tank 102, as well as agitating the low-temperature nitrogen gas (low-temperature gas) inside the cooling tank 102
Implementation Method 3
Sub-zero treatments in which steel materials such as machine components are cooled to low temperatures of 0° C. or lower
Data Source
AI summary
The present invention provides a sub-zero treatment device capable of uniformly cooling a cooling target object and reducing the amount of liquid refrigerant used for cooling the cooling target object. The sub-zero treatment device has an exhaust member extending from a through-hole provided in a cooling tank constituting a cooling target object mounting chamber through to the interior of the cooling target object mounting chamber, and having an exhaust port, wherein the exhaust port is disposed in an exhaust port positioning space, which is the space located in the upper half of the cooling target object mounting chamber and having a width in the transverse direction that is equal to the maximum width in the transverse direction of the suction port.