High-voltage pulse electric field sterilizing treatment chamber for monitoring strength and temperature of electric fields on line

Abstract

The invention discloses a high-voltage pulse electric field sterilizing treatment chamber for monitoring the strength and temperature of electric fields on line. Two coaxial treatment chamber bodies are formed from two tubular high-voltage electrodes and tubular grounding electrodes, the two tubular high-voltage electrodes are partitioned by an insulating tube, and both ends of the tubular grounding electrodes are sheathed with insulated protecting sleeves, thereby a coaxial continuous high-voltage pulse electric field treatment chamber is formed. A Hall element and a linear digital temperature sensor are installed in the treatment chamber, signals are sent into a single-chip machine after conditioning, amplification and A/D conversion, and then each parameter is displayed by a liquid crystal display module. The high-voltage pulse electric field sterilizing treatment chamber can ensure the distributing uniformity of the electric fields and also improve the flow characteristics of liquid materials to improve the treatment flow, and avoids the occurrence of dead zones, and the treatment effect is obviously improved; and moreover, the high-voltage pulse electric field sterilizing treatment chamber quantitatively monitors the strength and temperature values of the electric fields in the treatment chamber on line in real time and can provide data support for the simulated modeling of a treatment system.

Description

technical field [0001] The invention relates to a sterilization treatment device, in particular to a high-voltage pulse electric field sterilization treatment room for online monitoring of electric field intensity and temperature. Background technique [0002] As one of the most researched non-thermal processing technologies in recent years, the high-voltage pulsed electric field sterilization technology not only has a good effect of sterilizing and inactivating enzymes, but also can maintain the freshness of food to the greatest extent, and the processing temperature is low and the processing time is short. The shelf life of food can also save energy, save costs, and have no pollution to the environment. The high-voltage pulse electric field sterilization system is mainly composed of two parts: a high-voltage pulse generator and a sterilization treatment chamber. The processing chamber is used to load the processed samples and place the electrodes, and the samples can be u...

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Problems solved by technology

A coaxial processing chamber described by Qin et al. (US Patent5662031) has a very uniform electric field intensity distribution, but due to the restriction of the processing chamber structure, the processing flow rate of the processing chamber is difficult to meet the needs of industrial production; The "dead zone" in the room will cause the processed materials to stay for too long, causing the local temperature in the processing room to rise too fast, thus affecting the sensory and nutritional quality of the processed food

[0003] In addition, because the internal space of the high-voltage pulsed electric field sterilization treatment chamber is very narrow, the traditional method of measuring electric field strength - the small ball perturbation method is not applicable

In the multi-point temperature measurement system, the traditional temperature measurement method is to sample the analog signal and perform A / D conversion. In order to obtain higher measurement accuracy, it is necessary to solve the problems caused by factors such as multi-point measurement switching and zero-point drift of the amplifying circuit. error compensation problem

At present, the high-voltage pulse electric field sterilization treatment chambers developed at home and abroad do not directly measure the internal field strength, temperature and liquid flow characteristics through instruments. Usually, computer simulation technology is used to evaluate the uniformity of treatment conditions inside the treatment chamber. , so its reliability and accuracy have been questioned by many

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