Ice wrapping method for foods

Abstract

The present invention discloses an ice wrapping method for foods. The method comprises the following steps of (1) enabling the temperature of the quickly frozen foods to be -18 DEG C or below; (2) flatly spreading the quickly frozen foods and putting the quickly frozen foods on a silk screen-shaped supporting surface in a single-layer manner; (3) arranging a closed ice wrapping chamber or a semi-closed ice wrapping chamber, and enabling aerial fog to be uniformly distributed in the closed ice wrapping chamber or the semi-closed ice wrapping chamber by a two-fluid atomization nozzle; (4) conveying the quickly frozen foods arranged in a layer shape into an ice wrapping environment, enabling the aerial fog in the ice wrapping environment to be solidified on the surfaces of the low-temperaturequickly frozen foods to form small ice crystal particles, and forming protective ice layers which cover the quickly frozen foods on the surfaces of the quickly frozen foods; and (5) conveying the ice-wrapped foods to outside from the interior of the closed ice wrapping chamber or the semi-closed ice wrapping chamber. According to the method, in the ice wrapping process, the quickly frozen foods do not need to be turned over, so that the collision and friction between the foods are reduced, the appearance, color and taste change of the foods is prevented, the ice layer thickness of the quicklyfrozen foods subjected to ice wrapping is controllable, and the food quality is improved.

Description

technical field [0001] The invention relates to a food processing device, in particular to a method for wrapping food in ice. Background technique [0002] Quick-frozen food saves time and trouble and has become an indispensable food in people's life. With the rapid development of China's economy and the accelerated pace of life, the demand for quick-frozen food has also increased greatly. [0003] In order to keep quick-frozen food fresh, in the process of production and processing, it is usually necessary to "wrap ice" on the quick-frozen food after quick-freezing, that is, to wrap a layer of ice on the surface of the quick-frozen food, so as to better prevent the loss of food nutrients and keep the food fresh. Good color and original taste. [0004] In order to "wrap ice" for quick-frozen food, the prior art adopts two different methods, water immersion or water spraying, such as: [0005] The first method: the Chinese invention patent with the authorized notification n...

AI Technical Summary

Problems solved by technology

[0010] (3) In order to make the quick-frozen food fully contact with the ice water, when the food passes through the ice-coating tank, the vibrating part needs to reciprocate back and forth in the direction perpendicular to the mesh surface of the transmission mesh belt, so as to turn the quick-frozen food that is driven in the ice-coating tank , between the food and the transmission mesh belt, and between the food and the food, the collision and friction will inevitably occur, which will damage the surface of the quick-frozen food and affect the color and taste of the food surface.

It is time-consuming and labor-intensive to clean and reset, and waste a lot of water and electricity (refrigeration)

[0012] (5) Since the surface of the quick-frozen food after the food is wrapped in ice forms an ice shell, it takes a long time to thaw before eating later, and the thickness of the ice layer is different. When thawing, the thinner part of the ice layer is thawed first, and the water in the place is thawed first. Part of it will penetrate into the food, further changing the color and seasoning of the food, affecting the taste and nutrition of the product

[0013] (6) The quick-frozen food is conveyed through the ice-wrapped tank by the transmission mesh belt. In order to make the quick-frozen food fully contact with the ice water, it is necessary to turn over the quick-frozen food. The wavy, wave-shaped transmission mesh belt, when the quick-frozen food is turned over, collisions and frictions inevitably occur between the food and the transmission mesh belt, and between the food and the food, which will damage the surface of the quick-frozen food and affect the quality of the food. The color and luster of the surface and the flavor of modulation

[0018] (2) Due to the different shapes of quick-frozen foods, for quick-frozen foods that are blocky and closer to round, it is easier to turn them over; The trough of the conveying part of the conveyor belt is easy to form stacks, and the quick-frozen foods at the stacks are not fully ice-coated and uneven

[0019] (3) Due to insufficient and uneven ice coating, the surface of quick-frozen food after ice-coating forms an ice shell. Before eating in the later period, it takes a long time to thaw and the thickness of the ice layer is different, so that part of the ice at the thinner part during thawing The layer is thawed first, and part of the water in the first thawed part will penetrate into the food, which will further change the color and seasoning of the food, and affect the taste and nutrition of the product.

[0021] (5) There is an inner cavity between the inner wall and the outer wall of the spray cover, and the inner wall is evenly equipped with spray holes connected to the inner cavity. The water supply pressure of all the spray holes is the same, and different spray holes cannot be adjusted separately. The amount of water sprayed, and the size of the water sprayed is only adjusted by the water spray pressure. When the water spray pressure changes, the water spray coverage of the water spray hole will also change, which will further affect the uniformity of the water spray and affect the wrapping. Ice effect; in addition, when the water spray hole is gradually worn out during the working process, the equipment is not easy to maintain, and only a new spray cover can be replaced

[0023] (1) The conveyed quick-frozen food needs to be turned over to coat different sides with ice, but the turning process increases the number of components, reduces the speed of ice-wrapping treatment, consumes energy, and reduces the efficiency of ice-wrapping, and The collision, friction and stacking caused by the flipping process will greatly affect the uniformity of the ice coating and affect the appearance and taste of the product

[0024] (2) The thickness of ice coating is not easy to adjust accurately

The reason is mainly due to two aspects, one is the uneven distribution of materials on the wavy conveyor belt, and the other is that the amount of water that the surface of the quick-frozen food contacts cannot be adjusted or better controlled

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