TWI741751B - Agricultural products cold-pressed method by cryogenic-heating-sine pressure cycling procedure - Google Patents

Abstract

In general, this inventive procedure is conducted by a cold-pressed method of agricultural products. First of all, with LN2, the temperature can gradually decrease from room temperature to below – 40°C in order to let LN2 penetrate into every tiny pore of tea leaf. Afterwards, by making the temperature higher rapidly, the cell wall of those tea leaves will swell greatly and then explode. During the process, 1-3 atm sine wave pressure will be applied. Finally, after the cell wall explosion, tea leaves will be heated to above 88°C. Through the whole special process, tea fragrance is overflowing.

Description

Cold-heat high-pressure cycle cold-shrinkage density extrusion method for agricultural products

The present invention relates to a cold-hot high-pressure cycle cold-shrinkage density extrusion method for agricultural products, and mainly refers to a method that can precipitate pesticides and improve the taste of agricultural products.

Conventional agricultural products are generally sprayed with pesticides to prevent insects from biting and increase production capacity. However, the pesticide residues on agricultural products will affect food safety and taste.

As far as tea is concerned, traditional tea leaves have a better flavor through fermentation and roasting. Recently, it has also improved methods such as heat convection or far-infrared vacuum to reduce the bitter and astringent taste of tea, and can be compared with traditional fermentation. The baking method has a better flavor.

However, this improved method has limited effect in reducing bitterness and astringency, so there is still a need for further improvement.

The purpose of the present invention is to provide a method that can precipitate pesticides and improve agricultural products.

The cold-hot high-pressure cycle cold-shrinkage density extrusion method for agricultural products of the present invention includes the following steps: S1 is equipped with a cold and hot high pressure cycle cold shrink density extruder with a containing tank, and the agricultural products are placed in the containing tank; S2 evacuates the accommodating tank; S3 cools down and condenses the holding tank, and puts it at a set low temperature for a set time; during the condensation process, a sinusoidal pressure of 1 to 5 atmospheric pressure is applied; S4 heats the containing tank and let it stand for a period of time; S5 The temperature of the accommodating tank drops and the agricultural products are taken out.

In one embodiment of the present invention, the cold-heat high-pressure cycle cold shrinkage density extrusion machine has a closed containing tank, the containing tank is connected to an external liquid nitrogen pipeline and a vacuum device, the liquid nitrogen pipeline is connected to a liquid nitrogen tank, and The accommodating tank is provided with a one-way pressure relief valve, a heating device is provided in the accommodating tank, and a number of brackets are arranged at different height positions in the accommodating tank.

In an embodiment of the present invention, the S2 step is to evacuate the accommodating tank so that the pressure in the accommodating tank is below 0.2 atmospheric pressure.

In an embodiment of the present invention, the S3 step is to start liquid nitrogen, so that the temperature in the containing tank is gradually reduced from normal temperature to 0°C to -196°C.

In an embodiment of the present invention, the process of cooling, condensing, and standing for a period of time when the temperature reaches the set low temperature in step S3 is 3-6 hours.

In an embodiment of the present invention, the heating temperature in step S4 is 5°C to 200°C.

In an embodiment of the present invention, the heating and standing for a period of time in step S4 is 1-3 hours.

When the agricultural product of the present invention is tea, the liquid nitrogen can be pushed into the pores of the tea by low temperature condensation and sine pressure wave in step S3; and the temperature of the liquid nitrogen is raised in step S4 and the cell wall of the tea epidermis can be blasted, which can not only precipitate the original tea The bitter, astringent components and possible residual pesticides can also extract the deep rich tea fragrance of tea. The invention can greatly improve the taste of tea and solve the problem of long-term pesticide residues, and improve the safety and sanitation effect of tea.

Please refer to Figures 1 to 3. The cold-heat cycle cold shrinkage density extrusion method for agricultural products of the present invention includes the following steps: S1 is equipped with a cold and hot high pressure cycle cold shrink density extruder with a containing tank, and the agricultural products are placed in the containing tank; S2 evacuates the accommodating tank; S3 cools down and condenses the holding tank, and puts it at a set low temperature for a set time; during the condensation process, a sinusoidal pressure of 1 to 5 atmospheric pressure is applied; S4 heats the containing tank and let it stand for a period of time; S5 The temperature of the accommodating tank drops and the agricultural products are taken out.

The cold-heat high-pressure cycle cold-shrink density extruder 1 of the present invention has a closed accommodating tank 11, the accommodating tank 11 is connected to an external liquid nitrogen pipeline 21 and a vacuum device 3, and the liquid nitrogen pipeline 21 is connected to a liquid nitrogen tank 2 In addition, the accommodating tank 11 is provided with a one-way pressure relief valve 12, and a heating device 4 is provided in the accommodating tank 11, and the accommodating tank 11 is provided with a number of brackets 5 at different heights to hold agricultural products 6.

In step S1 of the present invention, the agricultural product 6 can be placed on the bracket 5 of the cold-hot high-pressure circulating cold shrinkage density extruder 1. The agricultural product 6 can be tea, ginseng or other agricultural products 6; and the S2 step is performed by a vacuum device 3 Vacuum the accommodating tank 11 and make the pressure in the accommodating tank 11 below 0.2 atmosphere pressure.

The step S3 of the present invention is to start the liquid nitrogen 22, so that the temperature in the containing tank 11 is gradually reduced from normal temperature to 0°C~-196°C. The preferred condensation temperature is below -40°C, and the liquid nitrogen 22 is absorbed during the condensation process. The heat energy of the items in the accommodating tank 11 is expanded and pressurized, and the pressure can be relieved by controlling the pressure relief valve 12 when the pressure of the accommodating tank 11 is increased to exceed the set pressure, and the condensing process is simultaneously applied to 1~5 The sinusoidal pressure of atmospheric pressure ravages the agricultural products 6, as shown in Figures 2 and 3. This embodiment applies a sinusoidal pressure of 1-3 atmospheric pressure to the containing tank 11, which can break the chemical bonds of pesticides and push liquid nitrogen 22 into it. When the pores of agricultural products 6 (such as tea) reach the set low temperature, let them stand for a period of time to ensure that the pores of all agricultural products 6 are evenly impregnated with liquid nitrogen 22 and there is enough time for the 6 molecules of agricultural products to be arranged uniformly and finely. The condensation and standing The time course can be 3 to 6 hours.

In step S4 of the present invention, the heating device 4 in the accommodating tank 11 is activated to raise the temperature of the accommodating tank 11 to 5°C~200°C, the preferred temperature is above 88°C, and the process of heating and standing still for a period of time can be 1~ After 3 hours, after baking in the containing tank 11, the liquid nitrogen 22 infiltrated into the pores of the agricultural product 6 will rapidly expand. This process causes the cell wall of the skin of the agricultural product 6 to burst, and the pesticide of the agricultural product 6 can be precipitated to maintain the hygiene and safety of the agricultural product 6; In step S5 of the present invention, the temperature of the accommodating tank 11 can be lowered to normal temperature so that the agricultural products 6 can be taken out.

When the agricultural product 6 of the present invention is tea, the liquid nitrogen 22 can be pushed into the pores of the tea by low-temperature condensation and a sinusoidal pressure wave in step S3; and the temperature of the liquid nitrogen 22 is raised in step S4 and the cell wall of the tea skin can be blasted. It can extract the original bitter and astringent components of the tea and possible residual pesticides, and can also extract the deep rich tea fragrance of the tea. The uniform and detailed tea molecules can improve the softness of the tea taste, not bitter, not astringent, nourishing body fluid, and returning to sweetness. The invention can greatly improve the taste of tea, solve the problem of long-term pesticide residues, and improve the safety and sanitation effect of tea.

Based on the above, the present invention is a novel method and can improve the better flavor and health and safety effects of agricultural products. The foregoing embodiments are examples of creation and are not limited to this creation. Any equivalent changes made in accordance with the spirit of this creation are also applicable. Should belong to the scope of this creation.

S1: Set up a cold-hot high-pressure cycle cold-shrink density extruder with a holding tank, and place the agricultural products in the holding tank S2: Vacuum the holding tank S3: Cool down and condense the holding tank, and let it stand for a set time when it reaches the set low temperature; apply a sinusoidal pressure of 1 to 5 atmospheres during the condensation process S4: Heat the holding tank and let it stand for a period of time S5: The temperature of the holding tank drops and the agricultural products are taken out 1: Cold and hot high pressure cycle cold shrink density extruder 11: containing tank 12: pressure relief valve 2: Liquid nitrogen barrel 21: Liquid nitrogen pipeline 22: Liquid nitrogen 3: Vacuum device 4: Heating device 5: Carriage 6: Agricultural products

Figure 1 is a schematic diagram of the manufacturing method of the present invention.

Figure 2 is a schematic diagram of the cold-heat high-pressure cycle cold shrinkage density extruder of the present invention.

Figure 3 is a schematic diagram of the cold-hot high-pressure cycle cold shrinkage density extrusion process and pressure distribution of the present invention.

S1: Set up a cold and hot high pressure cycle cold shrink density extruder with a holding tank, and place the agricultural products in the holding tank

S2: Vacuum the holding tank

S3: Cool down and condense the holding tank, and let it stand for a set time at a set low temperature; apply a sinusoidal pressure of 1 to 5 atmospheres during the condensation process

S4: Heat the holding tank and let it stand for a period of time

S5: The temperature of the holding tank drops and the agricultural products are taken out

Claims (8)

A cold-hot high-pressure cyclic cold-shrinkage density extrusion method for agricultural products. The steps are as follows: S1 sets a cold-hot high-pressure cyclic cold-shrink density extruder with a accommodating tank, and places the agricultural product in the accommodating tank; S2 the accommodating tank Vacuum; S3 cools and condenses the holding tank, and puts it at a set low temperature for a set time; applies a sinusoidal pressure of 1 to 5 atmospheric pressure during the condensation process; S4 heats the holding tank and allows it to stand for a period of time; S5 The temperature of the accommodating tank drops and the agricultural products are taken out. The cold-heat high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the storage tank of the cold-heat high-pressure cycle cold-shrink density extruder is closed, and the storage tank is connected to an external liquid nitrogen pipeline and draws a vacuum In the device, the liquid nitrogen pipeline is connected to the liquid nitrogen tank, the accommodating tank is provided with a one-way pressure relief valve, a heating device is provided in the accommodating tank, and a number of brackets are provided at different height positions in the accommodating tank. The cold-heat high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the step S2 is to vacuum the accommodating tank so that the pressure in the accommodating tank is below 0.2 atmospheric pressure. The cold-hot high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 2, wherein the step S3 is to start liquid nitrogen, so that the temperature in the holding tank is gradually reduced from room temperature to 0°C to -196°C. The cold-heat high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the process of cooling, condensing, and standing for a period of time when the temperature is set at a set low temperature in step S3 is 3-6 hours. The cold-heat high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the heating temperature in step S4 is 5°C to 200°C. The cold-hot high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the heating and standing for a period of time in the S4 step is 1-3 hours. The cold-hot high-pressure cycle cold-shrinkage density extrusion method for agricultural products according to claim 1, wherein the agricultural products can be tea or ginseng.

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