Compound kale juice as well as processing method and juicing equipment thereof

Abstract

The invention discloses a compound kale juice and a processing method thereof, the processing method comprises the following steps: mixing lemon juice and apple juice according to a mass ratio of 1: 2-1: 10 to obtain a compound liquid, adding the compound liquid in the kale juicing process, collecting juice after juicing to obtain the compound kale juice, and the mass ratio of the compound liquid to the kale is 1: 1-5: 1. Meanwhile, the invention also provides the compound kale juice obtained by the method and juicing equipment for juicing. The method solves the problems that kale products in the prior art are fast in quality deterioration, short in shelf life and not beneficial to industrial production, storage and market circulation. The invention further provides juicing equipment for processing the compounded kale juice.

Description

Technical Field

[0001] This invention relates to the field of kale deep processing technology, and in particular to a compound kale juice, its processing method, and juicing equipment. Background Technology

[0002] Kale is rich in nutrients and suitable for processing into health foods, such as kale juice. However, during actual processing, kale contains easily oxidized substances such as polyphenols and chlorophyll. Juicing damages the kale cells, allowing the active substances within the cells to come into full contact with air, triggering an oxidation reaction. This results in the juice becoming dark and brown (e.g., changing from bright green to grayish-green or yellowish-brown), losing its natural color advantage. The oxidation reaction is accompanied by characteristic flavor abnormalities, specifically a noticeable "pickled" taste, a sour and astringent flavor, and a prominent off-flavor, severely reducing the product's palatability and affecting consumer acceptance. The oxidation process also accelerates the degradation of nutrients (such as vitamins and active enzymes) in the juice, causing a rapid decline in the freshness of the kale juice and a shortened shelf life, which is detrimental to industrial production, storage, and market circulation. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a processing method for compound kale juice, which solves the problems of rapid deterioration of kale product quality, shortened shelf life, and unfavorable conditions for industrial production, storage and market circulation.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for processing compound kale juice includes the following steps: mixing lemon juice and apple juice in a mass ratio of 1:2 to 1:10 to obtain a compound solution; adding the compound solution during the kale juicing process; collecting the juice after juicing to obtain compound kale juice; the mass ratio of the compound solution to kale is 1:1 to 5:1.

[0006] Furthermore, the kale is crushed and then juiced.

[0007] Furthermore, the compound solution is added after crushing and before juicing.

[0008] Furthermore, the compound solution is added during the juicing process.

[0009] A compound kale juice obtained by the above method is also provided.

[0010] A juicing device for processing the above-mentioned compound kale juice is also provided, which includes an outer cylinder fixedly arranged vertically, a filter bucket fixedly arranged at the lower end of the outer cylinder, and a drain pipe fixedly connected to the outer cylinder and communicating with the space enclosed by the outer cylinder and the filter bucket. The filter bucket is provided with a plurality of filter holes, and the filter bucket also includes an outlet pipe fixedly extending to the lower part of the outer cylinder. The outlet pipe is detachably connected with a pipe cap, and also includes a pressure head that can be inserted into or withdrawn from the outer cylinder, with a gap left between the pressure head and the inner wall of the filter bucket. The pressure head is also fixed with a liquid guide pipe that can be opened or closed.

[0011] Furthermore, the pressure head includes a cylindrical section and a bucket-shaped section, the bucket-shaped section being able to be accommodated inside the filter hopper.

[0012] Furthermore, a pad is also provided inside the outlet pipe, and the pressure head also includes a column head section that is fixed to the bucket-shaped section and can abut against the pad.

[0013] Furthermore, an annular sleeve is fixed to the outer wall of the cylindrical section, which can fit with the inner wall of the outer cylinder through a gap.

[0014] Furthermore, an annular sleeve that can engage with the threaded inner wall of the outer cylinder is fixed to the outer wall of the cylindrical section.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] By adding lemon juice and apple juice during the kale juicing process, a synergistic antioxidant system is constructed to inhibit oxidation reactions at the source. This also improves the flavor of kale products, achieving a synergistic preservation of color, freshness, and taste. Ultimately, this results in kale products with better quality and a longer shelf life, solving the problems of rapid quality deterioration, shortened shelf life, and unfavorable conditions for industrial production, storage, and market circulation associated with existing technologies. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this embodiment. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of this embodiment. Figure 2 ;

[0019] Figure 3 This embodiment Figure 2 Enlarged schematic diagram of a local structure at point A;

[0020] Figure 4 This embodiment Figure 2 Enlarged schematic diagram of the local structure at point B.

[0021] The reference numerals in the accompanying drawings include:

[0022] 1. Outer cylinder, 2. Pressure head, 3. Filter hopper, 4. Liquid outlet ring cavity, 5. Drain pipe, 6. Outlet pipe, 7. Cylindrical section, 8. Bucket-shaped section, 9. Connecting shaft, 10. Liquid guide pipe, 11. Limiting ring, 12. Annular sleeve, 13. Pipe cover, 14. Pad, 15. Column head section. Detailed Implementation

[0023] The present invention will be further described in detail below through specific embodiments:

[0024] This solution provides a compound kale juice, which is processed by the following method: first, lemon and apple juice are extracted separately, then the lemon juice and apple juice are mixed in a mass ratio of 1:2 to 1:10 to obtain a compound liquid, then the kale is crushed and the compound liquid is added for juicing, or the compound liquid is added during the juicing process, with the mass ratio of the compound liquid to the kale being 1:1 to 5:1, and the juice is collected after juicing to obtain the compound kale juice product.

[0025] Conduct experiments and statistical analysis based on the parameters in the table below:

[0026]

[0027] Note: Sealed storage refers to storing the product in a glass bottle after processing, tightening the cap, and then storing it in a refrigerated environment away from light.

[0028] In this invention,

[0029] Firstly, lemon juice is rich in citric acid, which can effectively regulate the pH value of the kale juicing system, maintaining the juice pH value in a slightly acidic range (suitable for the stable range of easily oxidized substances in kale). As a natural antioxidant, citric acid can chelate metal ions (such as iron and copper ions) participating in oxidation reactions in kale juice, blocking the initiation of oxidation reactions. At the same time, vitamin C (ascorbic acid) in lemon juice can directly remove free radicals generated during the juicing process, inhibit the activity of polyphenol oxidase and chlorophyllase, reduce the oxidative browning of polyphenols and chlorophyll degradation, thereby maintaining the bright green color of the juice.

[0030] Secondly, apple juice is rich in natural fructose, glucose, and apple polyphenols. On the one hand, the reducing sugars it contains can form a synergistic antioxidant effect with the vitamin C in lemon juice, enhancing the overall antioxidant effect and further slowing down the oxidation process. On the other hand, the natural sweetness of apple juice can neutralize the slightly astringent taste of kale itself, while masking off-flavors such as the "pickled vegetable taste" produced during oxidation, thus achieving flavor harmony. In addition, the natural pectin in apple juice can form a thin protective film on the surface of the juice, reducing the contact area between the juice and air, indirectly inhibiting oxidation, and extending the freshness retention time.

[0031] Thirdly, when lemon juice and apple juice are added in a specific ratio, they complement each other in terms of pH adjustment, free radical scavenging, enzyme activity inhibition, and flavor blending. Compared with adding lemon juice or apple juice alone, the antioxidant effect is more significant, the color is maintained for longer, and the flavor is more harmonious, which can fundamentally solve the core pain points of traditional juicing.

[0032] like Figure 1-4As shown, in another aspect, this solution also provides a juicing device for performing the above-mentioned juicing process, which includes a vertically fixed outer cylinder 1, a pressure head 2 that is vertically raised and lowered above the outer cylinder 1, a filter bucket 3 fixed at the lower end of the outer cylinder 1, a liquid outlet annular cavity 4 enclosing the filter bucket 3 and the outer cylinder 1, a drain pipe 5 connected to the liquid outlet annular cavity 4 (the drain pipe 5 is connected to the lowest point of the bottom of the liquid outlet annular cavity 4 so that all the liquid in the liquid outlet annular cavity 4 can be discharged), and an outlet pipe 6 extending to the outside of the outer cylinder 1 (and the liquid outlet annular cavity 4) fixed at the lower end of the filter bucket 3. The pressure head 2 is driven by an externally installed driver to move up and down, and the pressure head 2 can be inserted into the outer cylinder 1. Continuing downwards, it can be inserted into the filter hopper 3, but a gap is always maintained between the pressure head 2 and the inner wall of the filter hopper 3. During juicing, the crushed kale is first placed into the outer cylinder 1 (initially, the pressure head 2 is located above the outer cylinder 1, with a gap for the kale to be added). Then, the pressure head 2 is activated to move downwards into the outer cylinder 1. Furthermore, the pressure head 2 includes a cylindrical section 7 and a bucket-shaped section 8. A connecting shaft 9 is fixed at the center of the upper end face of the cylindrical section 7 for connection to the output end of the driver. The bucket-shaped section 8 is located below and moves with the driver... The bucket-shaped section 8 first enters the outer cylinder 1, pushing the kale downwards. The bucket-shaped section 7 then enters the outer cylinder 1, and the bucket-shaped section 8 enters the filter hopper 3. When the upper surface of the bucket-shaped section 7 is lower than the upper surface of the outer cylinder 1 (i.e., when the pressure head 2 is fully inside), the compounding solution can be introduced. Specifically, a liquid guide pipe 10 is installed on the pressure head 2, vertically penetrating it. The upper end can be connected to the compounding solution source (pumped into the liquid guide pipe 10 via a pump), and the lower end connects to the gaps between the pressure head 2 and the outer cylinder 1, as well as between the pressure head 2 and the filter hopper 3, thus introducing the compounding solution to the kale. In conjunction with the above embodiments, the compound liquid can be introduced first and then the press head 2 can be started to press downwards, or the compound liquid can be continuously introduced during the downward pressing process. The liquid guide tube 10 in this solution is detachable. Specifically, a threaded hole is provided through the press head 2, and the liquid guide tube 10 is threaded through the threaded hole. This facilitates subsequent disassembly for cleaning and maintenance. A limit ring 11 is also fixed at the upper end of the liquid guide tube 10. When the limit ring 11 abuts against the press head 2, it indicates that the liquid guide tube 10 is connected in place. At this time, the liquid guide tube 10 has an end located below the threaded hole and will not contact the inner wall of the filter bucket 3.More specifically, the filter hopper 3 is also equipped with several filter holes connecting its interior to the liquid outlet ring cavity 4. During the pressing process, the juice and compound liquid are pressurized and pass through the filter holes into the liquid outlet ring cavity 4, and then discharged to the outside through the drain pipe 5 (a valve is installed on the drain pipe 5 to control its opening and closing; the drain pipe 5 is closed before pressing and opens during pressing). More specifically, the filter holes in this design are relatively dense with a small pore size. Before the compound liquid is introduced, the pressure head 2 presses down to compress the kale, but not to the point that a large amount of juice is squeezed out. At this time, the kale essentially forms a filtering structure outside the filter holes. During the subsequent introduction of the compound liquid, a large amount of the compound liquid will not pass through the filter holes into the liquid outlet ring cavity 4, thus ensuring sufficient contact between the kale and the compound liquid during the juicing process and ensuring that the compound liquid plays the role described in the above embodiment.

[0033] like Figure 1 , 2 As shown, the pressure head 2 can be non-rotating and moves up and down, which is a vertical downward pressure, or it can rotate and move up and down (i.e., it also rotates during the up and down process). In this case, in addition to the vertical downward pressure, there is also rotation, which also crushes the kale during the juicing process, making the kale tissue more thoroughly broken down, and the compound liquid can also play a more thorough and timely protective role during the process. Furthermore, an annular sleeve 12 is fixedly wrapped around the cylindrical section 7. The annular sleeve 12 and the inner wall of the outer cylinder 1 are either clearance fit or threaded fit, to adapt to the two juicing methods mentioned above, that is, clearance fit when moving up and down without rotation, and threaded fit when moving up and down with rotation.

[0034] like Figure 1-3 As shown, during the juicing process, the kale is gradually squeezed into the outlet pipe 6, which is located below the outer cylinder 1. A cap 13 is detachably connected to the end of the outlet pipe 6 to prevent the kale from being directly discharged. After juicing, the cap 13 is opened to remove the kale residue. Furthermore, during discharge, the press head 2 can be pushed upwards first, using the space above the outer cylinder 1 to facilitate easy discharge of the residue. Additionally, a pad 14 is provided inside the outlet pipe 6, and the press head 2 also includes a columnar section 1 fixed to the bucket-shaped section 8 and capable of abutting against the pad 14. 5. The tube cap 13 and the outlet tube 6 can be threaded together. The pad 14 is placed inside the outlet tube 6. During the juicing process, the kale will come into contact with the pad 14. When the residue is discharged later, the tube cap 13 is opened. The pad 14 is heavier and will fall downwards, taking the residue with it. Furthermore, the pad 14 can prevent the kale from directly contacting the tube cap 13. At the same time, the upper end of the pad 14 is located above the lower edge of the liquid outlet ring cavity 4, which can ensure that all the squeezed juice enters the liquid outlet ring cavity 4 (filter holes are provided at the level or slightly lower of the upper end of the pad 14).

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A processing method for compound kale juice, characterized in that, Includes the following steps: Lemon juice and apple juice are mixed in a mass ratio of 1:2 to 1:10 to obtain a compound solution. The compound solution is added during the kale juicing process. After juicing, the juice is collected to obtain compound kale juice. The mass ratio of the compound solution to kale is 1:1 to 5:

1.

2. The processing method of compound kale juice as described in claim 1, characterized in that, Kale is crushed and then juiced.

3. The processing method of compound kale juice as described in claim 2, characterized in that, The compound solution is added after crushing and before juicing.

4. The processing method of compound kale juice as described in claim 2, characterized in that, The compound solution is added during the juicing process.

5. A compound kale juice, characterized in that, Obtained by the processing method of the compound kale juice according to any one of claims 1-4.

6. A juicing apparatus for processing compound kale juice as described in claim 5, characterized in that, The device includes a vertically fixed outer cylinder, a filter bucket fixed at the lower end of the outer cylinder, and a drain pipe fixedly connected to the outer cylinder and communicating with the space enclosed by the outer cylinder and the filter bucket. The filter bucket is provided with several filter holes, and the filter bucket also includes an outlet pipe fixedly extending to the lower part of the outer cylinder. The outlet pipe is detachably connected with a pipe cap, and also includes a pressure head that can be inserted into or removed from the outer cylinder, with a gap between the pressure head and the inner wall of the filter bucket. The pressure head is also fixed with a liquid guide pipe that can be opened or closed.

7. The juicing device as described in claim 6, characterized in that, The pressure head includes a cylindrical section and a bucket-shaped section, the bucket-shaped section being able to fit into the filter hopper.

8. The juicing device as described in claim 7, characterized in that, The outlet pipe is also equipped with a pad, and the pressure head also includes a column head section that is fixed to the bucket-shaped section and can abut against the pad.

9. The juicing device as described in claim 7, characterized in that, The outer wall of the cylindrical section is fixed with an annular sleeve that can fit with the inner wall of the outer cylinder.

10. The juicing apparatus as described in claim 7, characterized in that, The outer wall of the cylindrical section is fixed with an annular sleeve that can engage with the threaded inner wall of the outer cylinder.

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