Electronically-frequency-controlled voltage adjustment device and method for retaining freshness of foods by using the same

Abstract

An electronically-frequency-controlled voltage adjustment device comprises a power supply for providing voltages to an object; a temperature sensor for sensing temperatures of the object; a temperature control unit receiving temperature signals from the temperature sensor and outputting temperature variation signals; a voltage adjustment unit for adjusting output voltages of the power supply based on the temperature variation signals from the temperature control unit; and a frequency generator for generating oscillating current intermittently. Furthermore, a method for unfreezing and retaining the freshness of foods is also provided. The method uses the electronically-frequency-controlled voltage adjustment device to various freezing device and fries device so as to retain the freshness of foods.

Description

FIELD OF THE INVENTION [0001] The present invention relates to voltage adjustment devices, and in particular to an electronically-frequency-controlled voltage adjustment device which is used to retain the freshness of foods in unfreezing or frying. The present invention also relates to a method for retaining the freshness of foods by using the same. BACKGROUND OF THE INVENTION [0002] Currently, technologies for retaining freshness of foods and unfreezing foods use electrostatic technology. In that, transformers are used to boost the voltages and then resistance at output end is limited. In unfreezing process, voltages are applied to the foods. However there is a big trouble in the unfreezing process, that is a very long time period is necessary, for example, 8 to 10 hours are necessary to unfreeze foods from −6° C. to −2° C. Not only time is consumed, but also power is wasted. Thereby the quality of the food is deteriorated in the unfreezing process. [0003] In U.S. Pat. No. 5,034,23...

AI Technical Summary

Benefits of technology

[0004] Accordingly, the primary object of the present invention is to provide an electronically-frequency-controlled voltage adjustment device which is used to retain the freshness of foods in unfreezing or fried. The present invention also relates to a method for retaining the freshness of foods by using the same.

Problems solved by technology

In that, transformers are used to boost the voltages and then resistance at output end is limited.

However there is a big trouble in the unfreezing process, that is a very long time period is necessary, for example, 8 to 10 hours are necessary to unfreeze foods from −6° C. to −2° C. Not only time is consumed, but also power is wasted.

Thereby the quality of the food is deteriorated in the unfreezing process.

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