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Quick-freezing process for food

A food and fast technology, applied in the fields of food freezing, food processing, food preservation, etc., can solve the problems of inability to meet the needs of quick-frozen food, long freezing time, and large dry consumption, so as to improve the freezing speed and production efficiency, and reduce the crushing rate. , the effect of reducing loss

Active Publication Date: 2015-07-29
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, the refrigerant is used to cool the air, and then the cold air directly contacts the food to exchange heat with the food. Due to the poor thermal conductivity of the air and the small surface heat transfer coefficient, the freezing speed is slow. This is a low-efficiency freezing process.
Most of the freezing equipment use continuous steel belt or double-helix tunnel freezing devices. This type of equipment requires a lot of investment, occupies a large area, has low efficiency, long freezing time, high energy consumption, and large dry consumption. Small food (≤2cm)
[0003] At present, with the development of food technology and the improvement of people's living standards, the variety of products is gradually increasing, and the existing freezing devices can no longer meet the needs of quick-frozen food.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Such as figure 1 As shown, a device for rapid freezing of food includes a conveyor belt 1, and the device also includes a first refrigerant container 5 and a second refrigerant container 6, and the conveyor belt 1 passes through the first refrigerant container 5 and the second refrigerant container in sequence. Refrigerant container 6, the first refrigerant container 5 is filled with liquid nitrogen, the second refrigerant container 6 is filled with dry ice, the bottom of the second refrigerant container 6 is provided with a cooling fan 7, and the top of the entrance of the conveyor belt 1 is provided with a liquid spray device 3 A gas recirculation device 4 is provided above the first refrigerant container 5 and the second refrigerant container 6 .

[0059] During work, the food 2 that needs to be frozen is transported on the conveyor belt 1, and the unfrozen food 2 is sprayed by the liquid spray device 3 first, and then enters the first refrigerant container 5 along w...

Embodiment 2

[0070] Such as figure 2 As shown, a device for rapid freezing of food includes a conveyor belt 1, the device also includes a first refrigerant container 5 and a second refrigerant container 6, and the conveyor belt 1 passes through the second refrigerant container 6 and the first refrigerant container in sequence 5. The second refrigerant container 6 is filled with dry ice, the second refrigerant container 6 is provided with a cooling fan 7, the first refrigerant container 5 is filled with liquid nitrogen, and the conveyor belt 1 entrance is provided with a liquid spray device 3, the first A gas suction device 4 is arranged above the refrigerant container 5 and the second refrigerant container 6 .

[0071] The food 2 that needs to be frozen is transported on the conveyor belt 1. The unfrozen food 2 is sprayed by the liquid spray device 3 first, and then enters the second refrigerant container 6 along with the conveyor belt 1. The gas blown by the cold air fan 7 is cooled by d...

Embodiment 3

[0081] Such as image 3 As shown, a device for rapid freezing of food includes a conveyor belt 1, the device also includes a first refrigerant container 5, the conveyor belt 1 passes through the first refrigerant container 5, and liquid nitrogen is contained in the first refrigerant container 5, A liquid spraying device 3 is provided above the entrance of the conveyor belt 1 , and a gas suction device 4 is provided above the first refrigerant container 5 .

[0082] During work, the food 2 that needs to be frozen is transported on the conveyor belt 1, and the unfrozen food 2 is sprayed by the liquid spray device 3 first, and then enters the first refrigerant container 5 along with the conveyor belt 1, and is quickly frozen by liquid nitrogen. , as the conveyor belt 1 moves out of the first refrigerant container 5, it is collected by the staff for subsequent processing; according to the needs of the production volume, the speed of the conveyor belt 1 is adjusted to ensure the ti...

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Abstract

The invention belongs to the technical field of quick-freezing processes for food, and particularly relates to a quick-freezing process for food. In the process, the food is immersed into liquid nitrogen for contact type freezing. The freezing implementation method of the quick-freezing process for food is simple, increases the efficiency of food freezing, reduces energy consumption in the process of food freezing, and increases the quality of frozen food. Equipment corresponding to the process is low in one-time investment, can be constructed in a short time, and occupies small floor area.

Description

technical field [0001] The invention belongs to the technical field of quick-freezing technology of food, and in particular relates to a quick-freezing technology of food. Background technique [0002] At present, in the production process of industrial quick-frozen food, most of the quick-freezing tunnels are used to freeze the food. First, the refrigerant is used to cool the air, and then the cold air directly contacts the food to exchange heat with the food. Due to the poor thermal conductivity of the air and the small surface heat transfer coefficient, the freezing speed is slow. This is a low-efficiency freezing process. Most of the freezing equipment use continuous steel belt or double-helix tunnel freezing devices. This type of equipment requires a lot of investment, occupies a large area, has low efficiency, long freezing time, high energy consumption, and large dry consumption. Small food (≤2cm). [0003] At present, with the development of food technology and the...

Claims

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Application Information

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IPC IPC(8): A23L3/375
CPCA23L3/375A23V2002/00A23V2300/20Y02P60/85
Inventor 黄忠民艾志录齐国强潘治利马静一黄婉婧
Owner HENAN AGRICULTURAL UNIVERSITY
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