Rounded rectangular outline-spherical curved surface electrode-equipped low-temperature plasma sterilization processing cavity

Abstract

The invention relates to a rounded rectangular outline-spherical curved surface electrode-equipped low-temperature plasma sterilization processing cavity. The opposite surfaces of two metal electrode plates of the sterilization processing cavity are spherical curved surfaces; and the projection of the metal electrode plate outlines in a horizontal direction is rounded rectangular. By virtue of the sterilization processing cavity, high-intensity electric field can be distributed in a central region of the processing cavity in a concentrated manner, and the peak electric field on the electrode edges can be weakened to a certain degree, so that relatively ideal electric field intensity distribution can be obtained in the processing cavity; therefore, possibility of electric spark discharge can be lowered, operation safety can be ensured, and energy utilization rate and sterilizing effect can be improved; and furthermore, the novel low-temperature plasma sterilization processing cavity has the advantages of excellent performance, compact structure, convenience in use and the like, so that a new idea is provided for commercial application of the low-temperature plasma sterilization processing technology.

Description

technical field [0001] The invention relates to a sterilizing treatment chamber of a low-temperature plasma sterilizing treatment system, in particular to a low-temperature plasma sterilizing treatment chamber with a rounded rectangular outline-spherical curved surface electrode. Background technique [0002] With the improvement of living standards, people's demand for food quality is increasing. In order to maintain the minimum loss of food sensory and nutritional value, non-thermal sterilization technology has been widely used in food processing, and low-temperature plasma (NTP) sterilization technology is one of the more potential non-thermal sterilization technologies. NTP sterilization treatment technology has the advantages of high efficiency, low temperature, little damage to nutrients, and low energy consumption. Compared with other non-thermal sterilization technologies, the most obvious advantage is that it can directly sterilize sealed packaged food, attracting m...

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Problems solved by technology

[0004] The research on the low-temperature plasma sterilization treatment chamber shows that the plasma energy density in the treatment chamber is directly proportional to the potential difference between the plates, but due to the structure and shape of the plates, for example, the electrode contour is rectangular, polygonal, etc. curve, when the applied voltage reaches a certain value, the electric field intensity at the tip of the electrode is very concentrated, which can easily cause air breakdown and spark discharge, threatening personal safety; on the other hand, the electric field intensity distribution at the edge of the electrode is too concentrated, The energy density of ions in this area is much higher than the main generation area of ​​plasma, and the distribution of plasma energy density is uneven, which not only causes waste of electric field energy, but also affects the sterilization effect

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