CT Detector Unit Cooling via Stationary Air Channels
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Solution Overview
Problem
Conventional computer tomograph detector units face challenges in effective heat dissipation and stability due to high centrifugal forces caused by rapidly rotating gantries, leading to overheating and temperature drift, which existing cooling systems like fans are inadequate to address.
Innovation Solution
A detector unit design featuring an air inlet on its base surface to guide cooling airflow from outside, connected to a stationary air channel, eliminating the need for fans on the rotating gantry, with a control device using a baffle to regulate airflow and ensure constant detector temperature, and an air outlet for efficient heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If fans are used for cooling the detector unit, then heat dissipation is improved, but reliability deteriorates due to fan failures from bearing damage under high centrifugal forces
Solution Approach 1:
The invention extracts the cooling function from the rotating detector unit and relocates it to the stationary gantry structure. Fans are positioned in the stationary part of the gantry, drawing cooling air through channels that pass through the rotary carriage to reach the detector unit, thereby eliminating fan bearings from the rotating assembly and their associated reliability issues.
Solution Approach 2:
The invention introduces air channels as an intermediary medium to transfer cooling air from the stationary fan location to the rotating detector unit. These channels are integrated into the rotary carriage structure, allowing passive airflow transmission without mechanical moving parts in the rotating assembly.
2Productivity
If gantry rotational speed is increased to improve productivity, then scanning speed is improved, but heat dissipation deteriorates due to higher centrifugal forces affecting cooling effectiveness
Solution Approach 1:
The invention replaces the mechanical fan cooling system (which relies on centrifugal forces for airflow generation) with a stationary fan system that uses fixed air channels. This substitution allows effective cooling independent of gantry rotational speed, enabling high-speed scanning without compromising heat dissipation.
3Temperature
If fans are mounted on the rotating gantry to cool the detector, then cooling effectiveness is improved, but device complexity increases due to additional mounting structures and bearing systems
Solution Approach 1:
The invention merges the cooling air channel structure with the existing rotary carriage housing. The air channels are integrated into the structural components of the rotary carriage, eliminating the need for separate fan mounting structures and reducing overall system complexity while maintaining effective cooling.
4Ease of manufacture
If air cooling channels are integrated into the rotary carriage, then ease of manufacture is improved, but structural strength deteriorates due to additional openings and channels in the rotating structure
Solution Approach 1:
The invention uses thin-walled air channels formed as integral parts of the rotary carriage housing. These channels are designed as streamlined passages within the existing structural framework, minimizing material removal and maintaining structural integrity while enabling effective airflow for cooling.
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 solution provides effective heat dissipation and rotational stability, enabling the detector unit to operate reliably in modern, high-speed computer tomographs without fan-related issues, maintaining consistent temperature and preventing thermal drift.
Implementation Method 1
a cooling airflow produced outside the detector unit is guided through the air inlet onto an inner side of the detector surface
Data Source
AI summary
A detector unit of a computer tomograph includes a base surface that faces a support ring of a gantry of the computer tomograph in a mounting position, and a detector surface that is angled away from the base surface in an approximately perpendicular fashion, faces an isocentric axis of the gantry in the mounting position, and along which there are fitted a number of detector elements for detecting x-radiation. The base surface has an air inlet fitted in such a way that a cooling airflow applied from outside to the base surface is guided onto the inner side of the detector surface. In the mounting position, the air inlet corresponds with an air channel guided in the support ring or between the rotary carriage and the support ring.