High-frequency thawing device and high-frequency thawing method

Abstract

The invention provides a high-frequency thawing device and a high-frequency thawing method. The high-frequency thawing device comprises a thawing cabin, the thawing cabin comprises a thawing area, thethawing area comprises a positive electrode plate group and a negative electrode plate which are parallel to one another, wherein the positive electrode plate group comprises two or more positive electrode plates, the anode of a high-frequency generator is connected to the positive electrode plates of the positive electrode plate group, and both the cathode and the negative electrode plate of thehigh-frequency generator are connected to ground. The high-frequency generator applies high-frequency electric energy to the positive electrode plates and the negative electrode plate to thaw the frozen foods, wherein the distance between each positive electrode plate and the negative electrode plate can be adjusted. In the invention, the plate surfaces of the positive electrode plates and the negative electrode plate are smaller than the cross section of the frozen food along the plate surface direction, and the corners of the positive electrode plates have arc transition so as to reduce fringe effect. The edge of the positive electrode plates can be bent upwards so as to reduce fringe effect too, and to achieve the purpose of uniform thawing.

Description

technical field [0001] The invention relates to the field of high-frequency applications, in particular to a high-frequency unfreezing device and a high-frequency unfreezing method. Background technique [0002] High-frequency heating thawing is a new type of thawing method for frozen food. It uses the dielectric properties of food to heat up the food in the high-frequency cavity to achieve the purpose of thawing. Compared with other thawing methods, the thawing speed of high-frequency heating thawing is fast, the heating is uniform, and the quality of food is less affected. This high-frequency wave thawing device, in the state of clamping the frozen food between a pair of opposite electrodes, provides high-frequency electric energy generated by the high-frequency oscillator to the frozen food through the opposite electrodes, and uses the provided high-frequency electric energy to generate The electric induction heating makes the frozen food sandwiched between the opposite ...

AI Technical Summary

Problems solved by technology

[0003] However, in the case where the electrodes are facing each other, because the high-frequency energy tends to concentrate on the boundary of the medium, that is, the edges and corners of the frozen food, these parts are easier to be heated than other parts, so the frozen food cannot be uniformly heated. unfreezing problem

In particular, when the frozen food is meat, since the fat contained in the meat has high dielectric loss and electrical conductivity, it is in a state of being heated by Joule heat in addition to high-frequency electric induction heating, Therefore, when such fatty meat is located on the angular edge portion of the frozen meat, the angular edge portion of the thawed meat will be in a cooked state, resulting in an unfavorable situation of lowering the value of the commodity

[0004] Therefore, it is necessary to develop a high-frequency thawing device that can thaw frozen food evenly, but there is no such technology at present

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