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Method and device for freezing wrappers with various-power microwave assistance

A microwave-assisted, microwave-freezing technology, applied in food science, food preservation, application, etc., can solve the problems of expensive equipment, poor taste, unfavorable industrial mass production, etc., to maximize benefits, maintain original flavor, and guarantee frozen products quality effect

Active Publication Date: 2015-04-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect of using the existing method to freeze the dough is that the dough frozen by the traditional method will produce larger ice crystals, which will damage the structure of the pasta, thereby thawing and spitting water, cooking deformation and poor taste
In addition, the existing new freezing methods have their own disadvantages. Ultrasonic assisted freezing produces noise, and ultra-high pressure assisted freezing requires high and expensive equipment, which is not conducive to industrial mass production.

Method used

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  • Method and device for freezing wrappers with various-power microwave assistance
  • Method and device for freezing wrappers with various-power microwave assistance
  • Method and device for freezing wrappers with various-power microwave assistance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the device for the variable-intensity microwave-assisted freezing dough of the present embodiment includes a microwave dough transmission belt 1, an upper refrigeration cycle chamber 2, a lower refrigeration cycle chamber 3, a first-stage microwave freezing treatment chamber 4, a first-stage microwave generation system, The second-stage microwave freezing treatment chamber 5 and the second-stage microwave generating system. The first-stage microwave freezing treatment chamber 4 is connected to the first-stage microwave generation system; the second-stage microwave freezing treatment chamber 5 is connected to the second-stage microwave generation system.

[0040] The first-stage microwave generation system includes a first microwave generation and transmission device 6 and a first microwave cavity resonator 7 .

[0041] The second-stage microwave generation system includes a second microwave generation and transmission device 8 and a second mi...

Embodiment 2

[0059] Take raw materials: 3 parts of white granulated sugar, 3 parts of salt, 6 parts of yeast, dissolve with 200 parts of 50°C water. Add 60 parts of cornstarch and 10 parts of oil and put them into a large blender evenly. After cooling down, let it rest until the dough rises. After 2 hours, wake up completely. Press the dough into a 0.6cm sheet, roll up the dough and pre-cool to 4°C, put it on the conveyor belt and prepare to freeze. Connect the upper refrigeration cycle chamber and the lower refrigeration cycle chamber to a refrigerator modeled as HRS-248W for refrigeration cycle, with a flow rate of 0.1 L / min. Turn on the modified EG025LC7-NSH microwave pulse power supply. The conveyor belt is then turned on at a speed of 3 m / h. Wait for the dough to pass through the first-stage microwave freezing treatment chamber and the second-stage microwave freezing treatment chamber, then roll up the dough and send it to the freezer for freezing.

[0060] Among them, the specif...

Embodiment 3

[0066] Take raw materials: 30 parts of salt and pepper, 3 parts of salt, 2 parts of yeast, dissolve with 300 parts of water at 50°C. Add 1000 parts of high-gluten flour, 20 parts of oil, 5 parts of chives, and 5 parts of white sesame, and put them in a large mixer for 40 minutes. After cooling down, let it rest until the dough rises. After 2 hours, wake up completely. Press the dough into 0.6cm thin sheets and pre-cool to 5°C, roll up the dough and put it on the conveyor belt for freezing. Connect the upper refrigeration cycle chamber and the lower refrigeration cycle chamber to a refrigerator modeled as HRS-248W for refrigeration cycle, with a flow rate of 0.1 L / min. Turn on the modified EG025LC7-NSH microwave pulse power supply. The conveyor belt is then turned on at a speed of 2 m / h. Wait for the dough to pass through the first-stage microwave freezing treatment chamber and the second-stage microwave freezing treatment chamber, then roll up the dough and send it to the ...

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Abstract

The invention discloses a method for freezing wrappers with various-power microwave assistance. The method comprises the following steps: (1) precooling; (2) first-stage microwave freezing treatment, namely performing intermittent treatment at a temperature ranging from -28 to -32 DEG C by use of microwave having the frequency of 2.45GHz, wherein in one microwave cycle, the actual working time of the microwave is 50%-60% of the microwave cycle, and the treatment power of the microwave is 700W-1000W; (3) second-stage microwave freezing treatment, namely performing intermittent treatment at a temperature ranging from -28 to -32 DEG C by use of microwave having the frequency of 2.45GHz, wherein in one microwave cycle, the actual working time of the microwave is 40%-50% of the microwave cycle; the treatment power of the microwave is 300W-600W; and (4) delivering into a refrigeration house for frozen storage. According to the method, the size of ice crystals on the wrappers is reduced, and the juice wastage rate, the nutritive losses and the damage to the taste are reduced to the minimum.

Description

technical field [0001] The invention relates to the technical field of frozen food, in particular to a method and device for freezing dough assisted by variable-intensity microwaves. Background technique [0002] Food freezing technology is to inhibit the activity of microorganisms and enzymes and reduce the activity in the food matrix by lowering the temperature and changing the form of water in the food, so as to prevent food spoilage and maintain the freshness and nutritional value of food. [0003] At present, rapid food freezing technologies such as air cooling, flat plate contact, circulating brine, liquid nitrogen freezing and other methods have also made great progress. In addition, new freezing methods such as ultrasonic assisted freezing, ultra-high pressure assisted freezing, and electric field assisted freezing are also being explored gradually from the laboratory to industrialization. [0004] Microwave is a radio wave with a frequency of 300MHz to 300GHz. Its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/36A23L3/26
CPCA23L3/26A23L3/36
Inventor 孙大文张孜曾新安朱志伟韩忠
Owner SOUTH CHINA UNIV OF TECH