1. Importance of temperature uniformity
Fully automatic high pressure steam sterilizer plays a key role in many fields such as medical treatment and scientific research, and its temperature uniformity is directly related to the sterilization effect. During the sterilization process, if the temperature distribution inside the equipment is uneven, the microorganisms in some areas may not be completely killed, which may lead to serious consequences. For example, when sterilizing medical devices, uneven temperature may cause bacteria, viruses or spores to remain in some corners or internal structures of some devices. These inactivated microorganisms will cause cross infection in subsequent use and threaten the health of patients. Therefore, precise control of temperature uniformity is one of the core elements to ensure the quality of sterilization.
2. Factors affecting temperature uniformity
Multiple factors will affect the temperature uniformity of fully automatic high pressure steam sterilizer. The first is the generation and distribution of steam. Insufficient steam or unreasonable distribution will cause local temperature differences. For example, unstable steam generator power may cause the steam supply to be more or less, which in turn causes temperature fluctuations. Secondly, the internal structure design of the sterilizer is crucial, such as the shape and size of the cavity and the layout of the internal shelves. Unreasonable shelf design may hinder the smooth flow of steam and form temperature dead corners. Furthermore, the wrapped or loaded items will also have an impact. The volume, shape, placement and loading of the items will change the flow path of steam and the efficiency of heat transfer. For example, a large number of densely placed large instruments will hinder the diffusion of steam and reduce the surrounding temperature.
3. Technical means of temperature uniformity control
In order to achieve good temperature uniformity, a series of technical means are applied. First, an advanced steam injection system is used to ensure that steam is evenly injected into the sterilization chamber by optimizing the number, position and angle of the steam nozzles. For example, multiple steam nozzles with adjustable angles are evenly distributed on the top and around the cavity, so that steam enters from different directions to enhance the mixing effect of steam. Second, high-precision temperature sensors are installed to monitor the temperature of multiple locations in the sterilizer in real time and feed back to the control system. The control system automatically adjusts the power of the steam generator, the opening of the steam valve and other parameters according to the sensor data, and dynamically adjusts the temperature. In addition, some sterilizers are also equipped with circulating fans to force steam to circulate in the cavity, reduce temperature stratification, and further promote temperature uniformity.
4. Verification and optimization of technology
For temperature uniformity control technology, strict verification and continuous optimization are required. In terms of verification, temperature verifiers can be placed at different locations in the sterilizer to simulate various sterilization loads and working conditions for testing, record and analyze temperature data, and ensure that temperature uniformity meets relevant standards (such as ±1°C or more stringent requirements). During the optimization process, the steam injection system, sensor layout, control algorithm, etc. are adjusted according to the verification results. For example, if it is found that the temperature in a certain area is always low, the steam nozzle flow rate near the area can be increased or the fan speed direction can be adjusted to make the temperature distribution more uniform. At the same time, with the development of technology and the emergence of new sterilization needs, new concepts and methods are constantly introduced, such as temperature prediction and control technology based on artificial intelligence, to further improve the temperature uniformity control level of fully automatic high pressure steam sterilizer to ensure the efficiency and safety of sterilization work.
