Hot Isostatic Pressing Device Forced Gas Circulation Cooling
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Solution Overview
Problem
Conventional hot isostatic pressing devices face limitations in cooling efficiency, particularly after HIP treatment, due to heat-insulating layers that inhibit heat transfer and natural convection, leading to prolonged cooling times, especially when the temperature drops below 300°C.
Innovation Solution
The HIP device employs a forced circulation system where pressure medium gas is circulated along the inner and outer surfaces of the high-pressure container, with a second cooling mechanism that merges high-temperature gas with cooled gas and returns it to the hot zone, enhancing cooling efficiency through forced convection and gas flow amplification, allowing for balanced heat discharge and rapid cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a heat-insulating layer is provided inside the high-pressure container to maintain thermal uniformity, then the hot zone can be maintained in a thermally uniform condition, but the cooling efficiency is inhibited because the heat-insulating layer prevents heat transfer from the hot zone to the container wall
Solution Approach 1:
The pressure medium gas circulation path is segmented into multiple regions: an inner circulation path inside the heat-insulating layer, an outer circulation path outside the heat-insulating layer, and a hot zone. This segmentation allows different circulation patterns in different regions, enabling both thermal uniformity maintenance and efficient heat discharge to the container wall.
Solution Approach 2:
Different circulation characteristics are applied to different locations: natural convection is utilized in the inner circulation path to maintain thermal uniformity, while forced convection is applied in the outer circulation path to enhance heat discharge efficiency to the container wall.
2Device complexity
If natural convection is used for pressure medium gas circulation outside the heat-insulating layer, then the structure is simple, but the flow rate of pressure medium gas is insufficient and cooling efficiency is severely limited
Solution Approach 1:
The heat-insulating layer acts as an intermediary that separates the inner and outer circulation paths. This allows the system to utilize natural convection inside the heat-insulating layer for thermal uniformity while employing forced convection outside for efficient heat discharge, resolving the contradiction between simplicity and efficiency.
3Use of energy by moving object
If the pressure medium gas merely circulates by natural convection outside the heat-insulating layer, then the system requires minimal energy input, but it takes a lot of time to transfer heat from the hot zone to the high-pressure container
Solution Approach 1:
The circulation mode is made dynamic and adaptable: natural convection is used when thermal uniformity is the priority, while forced convection is activated when rapid heat discharge is needed. This dynamic approach allows the system to optimize between energy consumption and heat transfer time based on process requirements.
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 enables efficient and rapid cooling of the hot zone, preventing non-uniform cooling and significantly reducing the time required for the cooling process, while maintaining thermal uniformity and preventing equipment damage from sudden temperature changes.
Implementation Method 1
a forced circulation system where pressure medium gas is circulated along the inner and outer surfaces of the high-pressure container
Implementation Method 2
heat-insulating layers that inhibit heat transfer
Implementation Method 3
transferring the heat within the hot zone to the casing by the inside circulating flow, and then discharging it out of the high-pressure container through a container wall
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A hot isostatic pressing device (1) according to the present invention includes an inner casing (3), an outer casing (4), and a heating means (7) which are provided inside a high-pressure container. The device further includes a first cooling means (41) for forcedly circulating pressure medium gas in such a manner that pressure medium gas guided upwardly between the inner casing (3) and the outer casing (4) is guided to the outside of the outer casing (4) through an upper part of the outer casing (4), cooled while being guided downwardly along an inner circumferential surface of the high-pressure container, and then returned to between the inner casing (3) and the outer casing (4) through a lower part of the outer casing (4); and a second cooling means (43) for guiding pressure medium gas within a hot zone formed inside the inner casing (3) to the outside of the hot zone, cooling the pressure medium gas guided to the outside by merging it with the pressure medium gas forcedly circulated by the first cooling means, and returning the cooled pressure medium gas into the hot zone. According to such a structure, a high cooling efficiency can be attained while maintaining the hot zone in a thermally uniform condition.