Freeze-dried Yuling paste and freeze-drying processing technology thereof

Abstract

The invention discloses a freeze-dried Yulingling paste and a freeze-drying processing technology thereof, the formula comprises longan aril and American ginseng, and the processing technology comprises the following steps: step 1, preparing raw materials; step 2, performing steaming treatment; step 3, diluting and filtering; 4, quantitative die filling; step 5, pre-freezing treatment; step 6, carrying out freeze-drying treatment; and 7, demolding and packaging. A freeze-drying process is adopted to prepare the Yulingling paste, during preparation, accurate quantification of solid components is achieved through quantitative die filling, the situation that the nourishing effect is affected due to the fact that the content difference of effective components is too large during single-time use is avoided, the freeze-dried Yulingling paste is in a loose and porous solid state, the water content of the freeze-dried Yulingling paste is extremely low, and therefore reproduction of microorganisms can be inhibited; the freeze-dried Yuling paste has the advantages that the freeze-dried Yuling paste has a long shelf life compared with the pasty Yuling paste, can be stored for a long time at normal temperature, can be carried about and taken at any time in cooperation with the design of independent small packages, is easier to dissolve due to the loose and porous form, and solves the problem that the pasty Yuling paste is caked after being brewed.

Description

Technical Field

[0001] The invention relates to the technical field of food, in particular to a freeze-dried Yuling paste and a freeze-drying processing technology thereof. Background Art

[0002] Yuling Paste, a traditional Chinese tonic, is usually made by steaming longan pulp and American ginseng for a long time. During the steaming process, rice is usually added to help neutralize the heat of the longan pulp. After steaming, the longan pulp and American ginseng form a paste-like texture. However, this Yuling Paste has the following shortcomings in actual use: 1. The paste is viscous and easily sticks during packaging and use. It is also difficult to dissolve when brewing, resulting in a poor user experience; 2. Due to the high water content and lack of effective antibacterial measures, microorganisms are prone to breed and multiply at room temperature, resulting in a short shelf life of the product and the need for refrigerated storage. This also makes Yuling Paste difficult to carry around and use at any time; 3. The solid components in the paste are unevenly distributed, resulting in large fluctuations in the content of active ingredients each time it is taken, thus affecting the stability of the tonic effect. Summary of the Invention

[0003] The purpose of the present invention is to provide a freeze-dried Yuling paste and a freeze-drying processing technology thereof to solve the problems raised in the above background technology.

[0004] To achieve the above purpose, the present invention provides the following technical solution: a freeze-dried Yuling paste, the formula of which includes: longan pulp and American ginseng, and the mass percentage content of each component is: 80-90% longan pulp and 10-20% American ginseng.

[0005] Preferably, the mass percentage contents of the components are: 90% longan pulp and 10% American ginseng.

[0006] A freeze-drying process for freeze-dried Yuling ointment, comprising the steps of: preparing raw materials; steaming; diluting and filtering; filling molds with quantitative quantities; pre-freezing; freeze-drying; and demoulding and packaging.

[0007] In the above step 1, taking the sum of the mass percentages of the components as 1, weighing longan meat and American ginseng according to the formula ratio, and mixing the longan meat and American ginseng uniformly to obtain a mixture A;

[0008] In the above step 2, the mixture A obtained in step 1 is transferred to container A, rice and water are added to container B, and then containers A and B are transferred to the intelligent temperature-controlled steaming equipment for steaming;

[0009] In the above step 3, the mixture A steamed in the vessel A is diluted with hot water until it is in a fluid state, and the fluid mixture A is filtered through a filter to obtain a filter residue and a filtrate;

[0010] In the above step 4, the filter residue obtained in step 3 is quantitatively placed in a grid-shaped mold, and the filtrate is then quantitatively poured into the grid-shaped mold to obtain a mixture B;

[0011] In the above step 5, the grid-shaped mold is transferred to a freeze-drying device to pre-freeze the mixture B;

[0012] In the above step 6, the freeze-drying equipment parameters are adjusted to freeze-dry the pre-frozen mixture B to obtain a dry block of Yuling paste;

[0013] In the above step seven, the block-shaped Yuling paste obtained in step six is demoulded and then vacuum-packed in an independent packaging bag.

[0014] Preferably, in the step 1, the longan pulp is pre-treated as follows: after being de-cored, it is low-temperature dried at a temperature of 40-60° C. to reduce the moisture content to below 15%.

[0015] Preferably, in step 1, the American ginseng is pretreated as follows: after being sliced, the American ginseng is subjected to low-temperature drying at a temperature of 40-60° C. to reduce the moisture content to below 15%, and then subjected to ultrafine grinding to obtain American ginseng powder with a particle size of 300-400 mesh.

[0016] Preferably, in step 2, the amount of rice used is 0.5-1.5 times the mass of the mixture, and the ratio of rice to water is 1:1.5-2.5.

[0017] Preferably, in step 2, the intelligent temperature control steaming equipment adopts a three-stage steaming method, specifically: in the first stage, the temperature is controlled at 70-80°C and steamed for 7-9 hours; in the second stage, the temperature is raised to 90-95°C and steamed for 15-17 hours; in the third stage, the temperature is lowered to 80-85°C and steamed for 23-25 hours. During the steaming process, the rice and water are replaced every 6 hours until 48 hours of steaming.

[0018] Preferably, in step 3, the hot water temperature is 80-100° C., the ratio of mixture A to hot water is 1:2-5, and the filter screen is 80-100 mesh.

[0019] Preferably, in step 5, the pre-freezing treatment is specifically as follows: first cooling to -10°C, maintaining for 1-2 hours to partially freeze the mixture B, and then cooling to -40°C, maintaining for 2-4 hours to completely freeze the mixture B.

[0020] Preferably, in step six, the freeze-drying treatment is specifically as follows: in the initial stage, the vacuum degree is controlled at 8-12 Pa, the temperature is raised to -25°C, and maintained for 5-6 hours to allow the ice crystals on the surface of the mixture B to sublime rapidly; in the intermediate stage, the vacuum degree is gradually reduced to 4-6 Pa, and the temperature is gradually increased to -15°C for 10-12 hours to allow the ice crystals inside the mixture B to sublime; in the final stage, the vacuum degree is maintained at 2-3 Pa, the temperature is raised to 20°C, and maintained for 2-4 hours for drying to reduce the water content to below 3%.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention adopts the freeze-drying process to prepare Yuling paste, and the precise quantification of solid components is achieved through quantitative molding during preparation, thereby avoiding the influence of the nourishing effect due to excessive differences in the content of effective ingredients during single use. The freeze-dried Yuling paste is in a loose and porous solid state with an extremely low water content, thereby inhibiting the reproduction of microorganisms. Compared with the paste Yuling paste, the shelf life is longer and it can be stored for a long time at room temperature. Combined with the independent small packaging design, it can be carried around and used at any time, and the loose and porous shape also makes the freeze-dried Yuling paste easier to dissolve, solving the problem of agglomeration of the paste Yuling paste during brewing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a process flow chart of the present invention;

[0023] Figure 2 The graph shows the solubility of the paste and dry block Yuling paste changing with brewing time;

[0024] Figure 3 This is a curve chart showing the change in the total number of microbial colonies in the paste and dry block Yuling paste as the storage time increases. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Please see the attached Figure 1 -Attached Figure 3 , a technical solution provided by the present invention:

[0027] Example 1:

[0028] A freeze-dried Yuling paste comprises longan pulp and American ginseng, wherein the mass percentage of each component is 90% of longan pulp and 10% of American ginseng.

[0029] A freeze-drying process for freeze-dried Yuling ointment, comprising the steps of: preparing raw materials; steaming; diluting and filtering; filling molds with quantitative quantities; pre-freezing; freeze-drying; and demoulding and packaging.

[0030] In the above step 1, longan pulp and American ginseng are weighed according to a formula ratio, with the sum of the mass percentages of the components being 1, and the longan pulp and American ginseng are uniformly mixed to obtain a mixture A; wherein the longan pulp has undergone the following pretreatment: after being de-cored, it is subjected to a low-temperature drying treatment at a temperature of 40-60° C. to reduce the moisture content to below 15%; and the American ginseng has undergone the following pretreatment: after being sliced, it is subjected to a low-temperature drying treatment at a temperature of 40-60° C. to reduce the moisture content to below 15%, and then subjected to an ultrafine grinding treatment to obtain an American ginseng powder with a particle size of 300-400 mesh.

[0031] In the above step 2, the mixture A obtained in step 1 is transferred to a vessel A, and rice and water are added to a vessel B, the amount of rice is 0.5-1.5 times the mass of the mixture, and the ratio of rice to water is 1:1.5-2.5, and then the vessel A and the vessel B are transferred to an intelligent temperature control steaming device for steaming. In the first stage, the temperature is controlled at 70-80°C and steamed for 7-9h. In the second stage, the temperature is raised to 90-95°C and steamed for 15-17h. In the third stage, the temperature is lowered to 80-85°C and steamed for 23-25h. During the steaming process, the rice and water are replaced every 6h until 48h is steamed;

[0032] In the above step 3, the mixture A steamed in the vessel A is diluted with 80-100°C hot water in a ratio of 1:2-5 until it becomes fluid, and the fluid mixture A is filtered through an 80-100 mesh filter to obtain a filter residue and a filtrate;

[0033] In the above step 4, the filter residue obtained in step 3 is quantitatively placed in a grid-shaped mold, and the filtrate is then quantitatively poured into the grid-shaped mold to obtain a mixture B;

[0034] In the above step 5, the grid-shaped mold is transferred to the freeze-drying equipment, and the mixture B is pre-frozen by first cooling it to -10°C and holding it for 1-2 hours to partially freeze the mixture B, and then cooling it to -40°C and holding it for 2-4 hours to completely freeze the mixture B;

[0035] Wherein in the above-mentioned step six, the freeze-drying equipment parameters are adjusted, and the mixture B after the pre-frozen treatment is freeze-dried. In the initial stage, the vacuum degree is controlled at 8-12 Pa, the temperature is raised to -25 ° C, and maintained for 5-6 hours to allow the ice crystals on the surface of the mixture B to sublime rapidly. In the intermediate stage, the vacuum degree is gradually reduced to 4-6 Pa, and the temperature is gradually increased to -15 ° C for 10-12 hours to allow the ice crystals inside the mixture B to sublime. In the final stage, the vacuum degree is maintained at 2-3 Pa, the temperature is raised to 20 ° C, and maintained for 2-4 hours, and the mixture is dried to reduce the water content to below 3% to obtain a dry block of Yuling paste;

[0036] In the above step seven, the block-shaped Yuling paste obtained in step six is demoulded and then vacuum-packed in an independent packaging bag.

[0037] Example 2:

[0038] Referring to the formula and processing technology of Example 1, only the mass percentage content of each component was changed to: 80% longan pulp and 20% American ginseng.

[0039] Example 3:

[0040] Referring to the formula and processing technology of Example 1, only the mass percentage content of each component was changed to: 85% longan pulp and 15% American ginseng.

[0041] Comparative Example:

[0042] A freeze-dried Yuling paste comprises longan pulp and American ginseng, wherein the mass percentage of each component is 90% of longan pulp and 10% of American ginseng.

[0043] A freeze-drying process for freeze-dried Yuling ointment, comprising the steps of: first, preparing raw materials; second, steaming;

[0044] In the above step 1, longan pulp and American ginseng are weighed according to a formula ratio, with the sum of the mass percentages of the components being 1, and the longan pulp and American ginseng are uniformly mixed to obtain a mixture A; wherein the longan pulp has undergone the following pretreatment: after being de-cored, it is subjected to a low-temperature drying treatment at a temperature of 40-60° C. to reduce the moisture content to below 15%; and the American ginseng has undergone the following pretreatment: after being sliced, it is subjected to a low-temperature drying treatment at a temperature of 40-60° C. to reduce the moisture content to below 15%, and then subjected to an ultrafine grinding treatment to obtain an American ginseng powder with a particle size of 300-400 mesh.

[0045] In the above step 2, the mixture A obtained in step 1 is transferred to a vessel A, and rice and water are added to a vessel B, the amount of rice is 0.5-1.5 times the mass of the mixture, and the ratio of rice to water is 1:1.5-2.5. The vessels A and B are then transferred to an intelligent temperature-controlled steaming device for steaming. In the first stage, the temperature is controlled at 70-80°C and steamed for 7-9 hours. In the second stage, the temperature is raised to 90-95°C and steamed for 15-17 hours. In the third stage, the temperature is lowered to 80-85°C and steamed for 23-25 hours. During the steaming process, the rice and water are replaced every 6 hours until 48 hours of steaming. The paste Yuling Paste is obtained after being taken out and cooled.

[0046] Experimental Example 1:

[0047] Take 5g of the dry block Yuling paste prepared in Example 1 and the paste Yuling paste prepared in the comparative example, respectively, and place them in two 200ml beakers, and pour 150ml of 90℃ hot water into them at the same time. Let them stand and observe without stirring, record the complete dissolution time, and observe the state of the solution; the experimental results are as follows: the paste Yuling paste still has obvious lumps after standing for 10min, and is completely dissolved after stirring for 3min; the dry block Yuling paste is completely dissolved within 30s without any lumps.

[0048] Experimental Example 2:

[0049] Take 10g of the dry block Yuling paste prepared in Example 2 and the paste Yuling paste prepared in the comparative example, put them in a sterile culture dish, place the culture dish in a constant temperature and humidity incubator with a temperature of 25°C and a humidity of 60%, and test the total microbial colony count of the two samples every 3 days, and observe for 12 days; the experimental results are as follows: after being stored at room temperature for 9 days, the total microbial colony count of the paste Yuling paste exceeded the standard, and mold and deterioration occurred; during the 12-day observation period, the total microbial colony count of the dry block Yuling paste did not increase significantly, and no deterioration occurred.

[0050] Experimental Example 3:

[0051] From the same batch of Yuling paste prepared in the comparative example, 3 samples were randomly sampled from the surface layer, middle layer and bottom layer, each weighing 5 g; 9 samples were randomly sampled from the same batch of dried block Yuling paste prepared in Example 3, each weighing 5 g, and the contents of American ginsenoside Rg1 and longan polysaccharide in all samples were determined by high performance liquid chromatography, and the relative standard deviation of the contents of the two components in each group of samples was calculated; the experimental results are as follows: in the Yuling paste sample, the RSD of the American ginsenoside Rg1 content was 18.7%, and the RSD of the longan polysaccharide content was 15.3%; in the dried block Yuling paste sample, the RSD of the American ginsenoside Rg1 content was 3.2%, and the RSD of the longan polysaccharide content was 2.8%. The uniformity of the effective ingredients of the dried block Yuling paste was significantly better than that of the paste Yuling paste.

[0052] The properties of dry block Yuling paste and paste Yuling paste are compared in the following table:

[0053]

[0054] Based on the above, the advantages of the present invention are: the Yuling paste prepared by the freeze-drying process of the present invention presents a loose and porous solid form, and with the independent small package design, it can be carried with you and used at any time, which not only solves the problem of packaging adhesion and inconvenient use, but also the loose and porous form is easier to dissolve, and it can be quickly dissolved into a uniform solution within 30 seconds when it comes into contact with water, solving the problem that the paste Yuling paste is easy to agglomerate when brewing; in the preparation process of the freeze-dried Yuling paste, precise quantification of the solid components is achieved through quantitative molding, avoiding excessive differences in the content of effective ingredients during single use; the water content of the freeze-dried Yuling paste is extremely low, so it has a strong microbial inhibition ability and can be stored for a long time at room temperature without adding preservatives.

[0055] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A freeze-dried Yuling ointment, the formula comprising: Longan pulp and American ginseng are characterized in that the mass percentage content of each component is 80-90% of longan pulp and 10-20% of American ginseng.

2. A freeze-dried Yuling paste according to claim 1, characterized in that: The mass percentage contents of the components are: 90% of longan pulp and 10% of American ginseng.

3. A freeze-drying process for freeze-dried Yuling ointment, comprising the steps of: preparing raw materials; steaming; diluting and filtering; loading into molds; pre-freezing; freeze-drying; and demoulding and packaging. In the above step 1, taking the sum of the mass percentages of the components as 1, weighing longan meat and American ginseng according to the formula ratio, and mixing the longan meat and American ginseng uniformly to obtain a mixture A; In the above step 2, the mixture A obtained in step 1 is transferred to container A, rice and water are added to container B, and then containers A and B are transferred to the intelligent temperature-controlled steaming equipment for steaming; In the above step 3, the mixture A steamed in the vessel A is diluted with hot water until it is in a fluid state, and the fluid mixture A is filtered through a filter to obtain a filter residue and a filtrate; In the above step 4, the filter residue obtained in step 3 is quantitatively placed in a grid-shaped mold, and the filtrate is then quantitatively poured into the grid-shaped mold to obtain a mixture B; In the above step 5, the grid-shaped mold is transferred to a freeze-drying device to pre-freeze the mixture B; In the above step 6, the freeze-drying equipment parameters are adjusted to freeze-dry the pre-frozen mixture B to obtain a dry block of Yuling paste; In the above step seven, the block-shaped Yuling paste obtained in step six is demoulded and then vacuum-packed in an independent packaging bag.

4. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In the step 1, the longan pulp is pre-treated as follows: after being de-cored, it is low-temperature dried at a temperature of 40-60° C. to reduce the moisture content to below 15%.

5. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In the step 1, the American ginseng is pretreated as follows: after being sliced, the American ginseng is subjected to low-temperature drying at a temperature of 40-60° C. to reduce the moisture content to below 15%, and then subjected to ultrafine grinding to obtain American ginseng powder with a particle size of 300-400 mesh.

6. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In the step 2, the amount of rice used is 0.5-1.5 times the mass of the mixture, and the ratio of rice to water is 1:1.5-2.

5.

7. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In the step 2, the intelligent temperature control steaming equipment adopts a three-stage steaming method, specifically: in the first stage, the temperature is controlled at 70-80°C and steamed for 7-9 hours; in the second stage, the temperature is raised to 90-95°C and steamed for 15-17 hours; in the third stage, the temperature is lowered to 80-85°C and steamed for 23-25 hours. During the steaming process, the rice and water are replaced every 6 hours until 48 hours of steaming are completed.

8. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In the step 3, the hot water temperature is 80-100° C., the ratio of mixture A to hot water is 1:2-5, and the filter screen is 80-100 mesh.

9. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In step 5, the pre-freezing treatment is specifically as follows: firstly cooling to -10°C and holding for 1-2 hours to partially freeze the mixture B, and then cooling to -40°C and holding for 2-4 hours to completely freeze the mixture B.

10. The freeze-drying process of the freeze-dried Yuling cream according to claim 3, wherein: In step six, the freeze-drying treatment is specifically as follows: in the initial stage, the vacuum degree is controlled at 8-12 Pa, the temperature is raised to -25°C, and maintained for 5-6 hours to allow the ice crystals on the surface of the mixture B to sublime rapidly; in the intermediate stage, the vacuum degree is gradually reduced to 4-6 Pa, and the temperature is gradually increased to -15°C for 10-12 hours to allow the ice crystals inside the mixture B to sublime; in the final stage, the vacuum degree is maintained at 2-3 Pa, the temperature is raised to 20°C, and maintained for 2-4 hours for drying to reduce the water content to below 3%.

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