阅读说明：本技术 一种芦笋浓缩汁杀菌装置及芦笋浓缩汁制备方法 (Asparagus concentrated juice sterilizing device and asparagus concentrated juice preparation method ) 是由 徐继成 周小楠 张慜 张晓虎 徐海洋 季长路 王顺民 袁硕 于 2019-10-29 设计创作，主要内容包括：本发明提供一种应用于农产品副产物加工技术领域的芦笋浓缩汁杀菌装置,本发明还涉及一种提高芦笋皂苷保存率的芦笋浓缩汁制备方法,所述的芦笋浓缩汁杀菌装置的装置箱体(7)底部设置水池(2),装置箱体(7)内设置传送带(5),装置箱体(7)一侧设置进料口(1),装置箱体(7)另一侧设置出料口(6),装置箱体(7)内部上端设置射频发生器(3),传送带(5)设置为位于水池(2)的水位下方位置的结构,本发明的芦笋浓缩汁装置,有效突破具有产业化意义的芦笋副产物浓缩汁的射频-水浴联合杀菌高效关键技术,制作的芦笋浓缩汁区别于常规榨汁产品,提高杀菌质量,使得芦笋皂苷保存率提高50％-60％,全面提高产品附加值。(The invention provides an asparagus concentrated juice sterilization device applied to the technical field of agricultural product byproduct processing, and also relates to an asparagus concentrated juice preparation method for improving the storage rate of asparagus saponin, wherein a water tank (2) is arranged at the bottom of a device box body (7) of the asparagus concentrated juice sterilization device, a conveyor belt (5) is arranged in the device box body (7), a feeding hole (1) is arranged at one side of the device box body (7), a discharging hole (6) is arranged at the other side of the device box body (7), a radio frequency generator (3) is arranged at the upper end in the device box body (7), and the conveyor belt (5) is arranged in a structure positioned below the water level of the water tank (2). The sterilization quality is improved, the preservation rate of the asparagus saponin is improved by 50-60%, and the added value of the product is comprehensively improved.)

1. The utility model provides an asparagus concentrated juice sterilizing equipment which characterized in that: the device comprises a device box body (7), wherein a water pool (2) is arranged at the bottom of the device box body (7), a conveying belt (5) is arranged in the device box body (7), a feeding hole (1) is formed in one side of the device box body (7), a discharging hole (6) is formed in the other side of the device box body (7), a radio frequency generator (3) is arranged at the upper end inside the device box body (7), and the conveying belt (5) is arranged to be located below the water level of the water pool (2).

2. An asparagus juice concentrate sterilization device according to claim 1, wherein: asparagus concentrated juice sterilizing equipment's feed inlet (1) and conveyer belt (5) be close to between feed inlet (1) one side and set up feeding and carry piece (8), discharge gate (6) and conveyer belt (5) are close to between discharge gate (6) one side and set up ejection of compact and carry piece (9).

3. An asparagus juice concentrate sterilization device according to claim 2, wherein: the asparagus concentrated juice sterilizing device is characterized in that a feeding conveying part (8) is arranged in an inclined mode, a discharging conveying part (9) is arranged in an inclined mode, the horizontal height of a feeding hole (1) is higher than that of a conveying belt (5), and the horizontal height of a discharging hole (6) is higher than that of the conveying belt (5).

4. An asparagus juice concentrate sterilisation device according to claim 1 or 2, characterised in that: the radio frequency generators (3) are arranged in a plurality of numbers, and the radio frequency generators (3) are arranged from one side close to the feed port (1) to one side close to the discharge port (9) in a clearance mode.

5. An asparagus juice concentrate sterilisation device according to claim 1 or 2, characterised in that: the distance between the radio frequency generator (3) and the conveyor belt (5) is between 10cm and 30 cm.

6. A preparation method of asparagus concentrated juice for improving the preservation rate of asparagus saponin is characterized by comprising the following steps: the preparation method of the asparagus concentrated juice for improving the storage rate of the asparagus saponin comprises the following steps:

s1, selecting raw materials: selecting a by-product of fresh asparagus as a raw material;

s2, cleaning and cutting, namely cutting the cleaned raw materials into sections;

s3, juicing and centrifuging: juicing and centrifuging the raw materials;

s4, filtering: filtering the raw material by using a filtering membrane;

s5, adjusting the pH value: adjusting the pH value of the filtered raw material by using sodium citrate;

s6, sterile filling: cooling the raw materials with the adjusted pH value, and then carrying out aseptic filling;

s7, radio frequency-water bath sterilization: placing the canned product obtained according to the step S6 in an asparagus concentrated juice sterilizing device for sterilization, controlling the water temperature of the water pool (2) to be between 90 and 100 ℃, controlling the radio frequency distance of the radio frequency generator (3) to be between 10 and 30cm, controlling the radio frequency to be between 25 and 28MHz, and controlling the sterilizing time to be between 20 and 40 min;

and S7, obtaining a finished product of the asparagus concentrated juice.

7. The method for preparing asparagus concentrated juice with improved asparagus saponin preservation rate as claimed in claim 6, wherein the method comprises the following steps: cutting the cleaned raw material into segments of 1-2 cm; when the raw material is filtered by a filtration membrane, a filtration membrane of 0.4 μm to 0.8 μm is used.

8. The method for preparing asparagus concentrated juice with improved asparagus saponin preservation rate as claimed in claim 6, wherein the method comprises the following steps: when the pH value of the filtered raw material is adjusted by sodium citrate, the pH value of the filtered raw material is adjusted to be within the range of 4.0 +/-0.3.

9. The method for preparing asparagus concentrated juice with improved asparagus saponin preservation rate as claimed in claim 6, wherein the method comprises the following steps: the radio frequency is 27.12 MHz.

10. The method for preparing asparagus concentrated juice with improved asparagus saponin preservation rate as claimed in claim 6, wherein the method comprises the following steps: the pH of the filtered material was adjusted to a range of 4.0. + -. 0.1.

Technical Field

The invention belongs to the technical field of agricultural product by-product processing, and particularly relates to an asparagus concentrated juice sterilizing device, and a preparation method of asparagus concentrated juice for improving the preservation rate of asparagus saponin.

Background

Asparagus, also called asparagus, enjoys the beauty of the king of vegetables in the international market, is rich in various amino acids, proteins, various vitamins and various mineral substances, the content of the asparagus is higher than that of common fruits and vegetables, the asparagus has special nutrition and dietary therapy effects, particularly asparagine and trace elements such as selenium, molybdenum, chromium, manganese and the like in the asparagus, has the capability of regulating organism metabolism and improving body immunity, and has strong inhibiting effect and pharmacological effect in the prevention and treatment of hypertension, heart disease, leukemia, blood cancer, edema, cystitis and the like. The Shennong Bencao lists asparagus as the top grade, which is called as the efficacy of not only reducing weight but also benefiting qi and prolonging life after long-term administration. The food and medicinal value of Germinatus Phragmitis from Ben Cao gang mu of Li Shizhen of Ming dynasty are described in detail. The nutritional value and the health care value of the asparagus are several times or even dozens of times of those of other vegetables and fruits, and the asparagus is determined as the head of the ten vegetables in the world by the world health organization, and is well sold in markets at home and abroad.

The asparagus produces a large amount of old stems, roots and leaves as byproducts in the processing and treatment process, and the total amount of the old stems, roots and leaves is about 50 to 60 percent of the yield of the asparagus. Through determination, the young stem, old stem, leaf and whole plant of asparagus all contain rich nutrient components and have good health care function. The content of vitamins in old stems and pseudoleaves is slightly lower than that of caulicles, but the content of amino acids essential to human bodies except threonine is higher than that of caulicles, and the contents of trace elements and other effective components are not different greatly. In addition, these asparagus by-products contain a large amount of biologically active substances, such as: steroid saponin, flavonoid compound, polysaccharide, etc. Modern medicine shows that asparagus has various pharmacological actions of diuresis, liver protection, immunity regulation, fungus resistance, tumor resistance, cancer resistance, aging resistance and the like. The asparagus by-product is not fully utilized in the prior art, and the prior art does not relate to the problem to be solved by the invention.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the asparagus concentrated juice sterilizing device is simple in structure, effectively breaks through a radio frequency-water bath combined sterilization efficient key technology of asparagus byproduct concentrated juice with industrial significance in the preparation process of the asparagus concentrated juice, and the prepared asparagus concentrated juice is different from conventional juiced products, so that the sterilization quality is improved, the asparagus saponin preservation rate is improved by 50% -60%, the preparation efficiency is improved, and the product added value is comprehensively improved.

To solve the technical problems, the invention adopts the technical scheme that:

the invention relates to an asparagus concentrated juice sterilization device, which comprises a device box body, wherein a water tank is arranged at the bottom of the device box body, a conveyor belt is arranged in the device box body, a feeding hole is formed in one side of the device box body, a discharging hole is formed in the other side of the device box body, a radio frequency generator is arranged at the upper end in the device box body, and the conveyor belt is arranged in a structure positioned below the water level of the water tank.

The asparagus concentrated juice sterilizing equipment is characterized in that a feeding conveying part is arranged between one side, close to the feeding hole, of the feeding hole and one side, close to the conveying hole, of the conveying belt, and a discharging conveying part is arranged between one side, close to the discharging hole, of the discharging hole and one side, close to the conveying belt, of the discharging hole.

The asparagus concentrated juice sterilizing equipment is characterized in that a feeding conveying part is arranged in an inclined mode, a discharging conveying part is arranged in an inclined mode, the horizontal height of a feeding hole is arranged to be higher than that of a conveying belt, and the horizontal height of a discharging hole is arranged to be higher than that of the conveying belt.

The radio frequency generators are arranged in a plurality of numbers, and the radio frequency generators are arranged from one side close to the feeding hole to one side close to the discharging hole in a clearance mode.

The distance between the radio frequency generator and the conveyor belt is 10cm-30 cm.

The invention relates to a preparation method of asparagus concentrated juice for improving the storage rate of asparagus saponin, which comprises the following steps:

s1, selecting raw materials: selecting a by-product of fresh asparagus as a raw material;

s2, cleaning and cutting, namely cutting the cleaned raw materials into sections;

s3, juicing and centrifuging: juicing and centrifuging the raw materials;

s4, filtering: filtering the raw material by using a filtering membrane;

s5, adjusting the pH value: adjusting the pH value of the filtered raw material by using sodium citrate;

s6, sterile filling: cooling the raw materials with the adjusted pH value, and then carrying out aseptic filling;

s7, radio frequency-water bath sterilization: placing the canned product obtained according to the step S6 in an asparagus concentrated juice sterilizing device for sterilization, controlling the water temperature of a water pool between 90 ℃ and 100 ℃, controlling the radio frequency distance of a radio frequency generator between 10cm and 30cm, controlling the radio frequency between 25MHz and 28MHz, and controlling the sterilizing time between 20min and 40 min;

and S7, obtaining a finished product of the asparagus concentrated juice.

Cutting the cleaned raw material into segments of 1-2 cm; when the raw material is filtered by a filter membrane, the filter membrane with the diameter of 0.4-0.8 μm is adopted;

when the pH value of the filtered raw material is adjusted by the sodium citrate, the pH value of the filtered raw material is adjusted to be within the range of 4.0 +/-0.3.

The radio frequency is 27.12 MHz.

The pH of the filtered material was adjusted to a range of 4.0. + -. 0.1.

By adopting the technical scheme of the invention, the following beneficial effects can be obtained:

the asparagus concentrated juice sterilizing device is designed based on the principle of radio frequency-water bath combined sterilization, and when the filling product obtained according to the step S6 is placed in the asparagus concentrated juice sterilizing device for sterilization, the water temperature of the water tank 2, the radio frequency distance of the radio frequency generator 3, the radio frequency and the sterilization time are controlled. Then, the control part controls the conveyor belt and the radio frequency generator to start, the control part can control the starting and stopping of the conveyor belt and speed adjustment, and the control part can control the starting and stopping of the radio frequency generator and frequency adjustment. When sterilization is carried out, bagged asparagus concentrated juice formed after sterile filling is input from a feeding hole, the bagged asparagus concentrated juice is conveyed towards a discharging hole through a conveying belt, and in the conveying process, the bagged asparagus concentrated juice is soaked in water passing through a water tank and is subjected to radio frequency treatment by a radio frequency generator, so that the radio frequency-water bath combined sterilization treatment is realized. The asparagus concentrated juice formed by the treatment is different from the conventional juiced product, so that the asparagus saponin preservation rate is improved by 50-60%, and the added value of the product is improved. The preparation method of the asparagus concentrated juice for improving the asparagus saponin storage rate has simple steps, effectively breaks through the radio frequency-water bath combined sterilization high-efficiency key technology of the asparagus by-product concentrated juice with industrial significance in the preparation process of the asparagus concentrated juice, and the prepared asparagus concentrated juice is different from the conventional juiced product, so that the sterilization quality of the asparagus concentrated juice is improved, the asparagus saponin storage rate is improved by 50-60%, the preparation efficiency is improved, and the added value of the product is comprehensively improved.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic view of the asparagus juice concentrate sterilization device according to the present invention;

in the drawings, the reference numbers are respectively: 1. a feed inlet; 2. a pool; 3. a radio frequency generator; 4. bagged concentrated asparagus juice; 5. a conveyor belt; 6. a discharge port; 7. a device case; 8. a feed conveyor; 9. and a discharge conveying member.

Detailed Description

The following detailed description of the embodiments of the present invention, such as the shapes and structures of the components, the mutual positions and connection relations among the components, the functions and operation principles of the components, will be made by referring to the accompanying drawings and the description of the embodiments:

as shown in the attached figure 1, the invention relates to an asparagus concentrated juice sterilization device, which comprises a device box body 7, wherein a water pool 2 is arranged at the bottom of the device box body 7, a conveyor belt 5 is arranged in the device box body 7, a feeding hole 1 is arranged at one side of the device box body 7, a discharging hole 6 is arranged at the other side of the device box body 7, a radio frequency generator 3 is arranged at the upper end in the device box body 7, and the conveyor belt 5 is arranged in a structure positioned below the water level of the water pool 2. The device is designed based on the principle of radio frequency-water bath combined sterilization, and when the filling product obtained according to the step S6 is placed in an asparagus concentrated juice sterilization device for sterilization, the water temperature of the water tank 2, the radio frequency distance of the radio frequency generator 3, the radio frequency and the sterilization time are controlled. Then, the control part controls the conveyor belt and the radio frequency generator to start, the control part can control the starting and stopping of the conveyor belt and speed adjustment, and the control part can control the starting and stopping of the radio frequency generator and frequency adjustment. When sterilization is carried out, bagged asparagus concentrated juice formed after sterile filling is input from a feeding hole, the bagged asparagus concentrated juice is conveyed towards a discharging hole through a conveying belt, and in the conveying process, the bagged asparagus concentrated juice is soaked in water passing through a water tank and is subjected to radio frequency treatment by a radio frequency generator, so that the radio frequency-water bath combined sterilization treatment is realized. The asparagus concentrated juice formed by the treatment is different from the conventional juiced product, so that the asparagus saponin preservation rate is improved by 50-60%, the added value of the product is improved, and the taste of the product is effectively improved.

Asparagus concentrated juice sterilizing equipment's feed inlet 1 and conveyer belt 5 be close to and set up feeding between 1 one side of feed inlet and carry piece 8, discharge gate 6 and conveyer belt 5 are close to and set up ejection of compact between 6 one side of discharge gate and carry piece 9. Above-mentioned structure, the asparagus concentrated juice in bags gets into from the feed inlet, places on the feeding earlier and carries the piece, and the feeding is carried the piece and is rotated under its control motor drives, carries the asparagus concentrated juice in bags on the conveyer belt, and the conveyer belt carries the asparagus concentrated juice in bags to being close to the discharge gate direction, and when the asparagus concentrated juice in bags conveys on the conveyer belt, be located the surface of water below and carry out the water bath. Then the piece is carried in the ejection of compact to the asparagus concentrated juice in bags, and the piece is carried in the ejection of compact and is rotated under its control motor drives, and the discharge gate position is carried to the asparagus concentrated juice in bags, can take out.

The feeding conveying part 8 of the asparagus concentrated juice sterilizing device is arranged in an inclined structure, the discharging conveying part 9 is arranged in an inclined structure, the horizontal height of the feeding hole 1 is higher than that of the conveying belt 5, and the horizontal height of the discharging hole 6 is higher than that of the conveying belt 5. Above-mentioned structure, feed inlet and discharge gate position are higher than the conveyer belt, make the asparagus juice concentrate in bags can not contact with the surface of water when the entering device box with send out the device box, and until when carrying on the conveyer belt, just can be located and carry out the water bath below the surface of water.

The radio frequency generators 3 are arranged in a plurality of numbers, and the radio frequency generators 3 are arranged at intervals from one side close to the feed inlet 1 to one side close to the discharge outlet 9. Above-mentioned structure ensures that when the asparagus concentrated juice in bags conveys on the conveyer belt, the asparagus concentrated juice in bags is located the below water on the one hand and carries out the water bath, and no matter on the other hand is located the conveyer belt any position, all receives the radio frequency generator cover irradiation.

The distance between the radio frequency generator 3 and the conveyor belt 5 is between 10cm and 30 cm. By the structure, the radio frequency distance between the radio frequency generator and the conveyor belt is controlled, so that the radio frequency effect is ensured.

The invention relates to a preparation method of asparagus concentrated juice, which has simple steps, effectively breaks through a radio frequency-water bath combined sterilization high-efficiency key technology of asparagus byproduct concentrated juice with industrial significance in the preparation process of the asparagus concentrated juice, is different from a conventional juiced product, improves the sterilization quality, improves the asparagus saponin preservation rate by 50-60%, improves the preparation efficiency, and comprehensively improves the added value of products.

The preparation method mainly adopts two key effects to achieve the purpose of preparing the high-fiber asparagus concentrated juice with high asparagus saponin preservation rate improved: firstly, a radio frequency generator with specific frequency is used for carrying out radio frequency sterilization, the sterilization time is controlled, the radio frequency sterilization penetrating power is strong, the heating is uniform, the temperature is not high, and the damage to asparagus saponin is small; secondly, the bagged asparagus concentrated juice is subjected to radio frequency sterilization in a water bath environment, so that the problem of good uniformity of radio frequency heating temperature is solved, and retention of asparagus saponin in asparagus powder is facilitated while sterilization is carried out.

The preparation method of the asparagus concentrated juice for improving the storage rate of the asparagus saponin comprises the following steps:

s1, selecting raw materials: selecting a by-product of fresh asparagus as a raw material;

s2, cleaning and cutting, namely cutting the cleaned raw materials into sections;

s3, juicing and centrifuging: juicing and centrifuging the raw materials;

s4, filtering: filtering the raw material by using a filtering membrane;

s5, adjusting the pH value: adjusting the pH value of the filtered raw material by using sodium citrate;

s6, sterile filling: cooling the raw materials with the adjusted pH value, and then carrying out aseptic filling;

s7, radio frequency-water bath sterilization: placing the canned product obtained according to the step S6 in an asparagus concentrated juice sterilizing device for sterilization, controlling the water temperature of the water pool 2 to be between 90 and 100 ℃, controlling the radio frequency distance of the radio frequency generator 3 to be between 10 and 30cm, controlling the radio frequency to be between 25 and 28MHz, and controlling the sterilizing time to be between 20 and 40 min;

and S7, obtaining a finished product of the asparagus concentrated juice.

Cutting the cleaned raw material into segments of 1-2 cm; when the raw material is filtered by a filter membrane, the filter membrane with the diameter of 0.4-0.8 μm is adopted;

when the pH value of the filtered raw material is adjusted by the sodium citrate, the pH value of the filtered raw material is adjusted to be within the range of 4.0 +/-0.3.

The radio frequency is preferably 27.12 MHz.

The pH of the filtered material is preferably adjusted to a range of 4.0. + -. 0.1.

The preparation method of the asparagus concentrated juice for improving the preservation rate of the asparagus saponin, disclosed by the invention, comprises the following steps:

selecting a by-product of fresh asparagus, cleaning and cutting the by-product into sections of 1-2 cm; juicing and centrifuging the cleaned and cut raw materials; filtering with 0.4-0.8 μm filter membrane; adjusting pH of the obtained concentrated juice of Germinatus Phragmitis to 4.0 + -0.1 with sodium citrate; cooling and then aseptic filling; sterilizing the obtained product in a sterilizing device for concentrated asparagus juice with water temperature of 90 deg.C, radio frequency distance of 10cm, radio frequency of 27.12MHz, and sterilizing time of 40 min. The prepared asparagus concentrated juice is different from a conventional juiced product, and the preparation method disclosed by the invention is applied, so that the preservation rate of the asparagus saponin is improved by 50-60%, and the preparation quality and the added value of the product are improved.

The embodiment 2 of the asparagus concentrated juice for improving the preservation rate of the asparagus saponin comprises the following steps:

selecting a by-product of fresh asparagus, cleaning and cutting the by-product into sections of 1cm to 2 cm; juicing the cleaned and cut raw materials, and centrifuging; filtering with 0.4-0.8 μm transition membrane; adjusting pH of the obtained concentrated juice of Germinatus Phragmitis to 4.0 + -0.1 with sodium citrate; cooling and then aseptic filling; sterilizing the obtained product in a sterilizing device for concentrated asparagus juice, wherein the water temperature is 95 ℃, the radio frequency distance is 20cm, the radio frequency is 27.12MHz, and the sterilizing time is 30 min. The prepared asparagus concentrated juice is different from a conventional juiced product, and the preparation method provided by the invention is applied, so that the asparagus saponin preservation rate is improved by 50% -60%, and the preparation quality and the product additional value are improved.

The embodiment 3 of the asparagus concentrated juice for improving the preservation rate of the asparagus saponin comprises the following steps:

selecting a by-product of fresh asparagus, cleaning and cutting the by-product into sections of 1cm to 2 cm; juicing the cleaned and cut raw materials, and centrifuging; filtering with 0.4-0.8 μm transition membrane; adjusting pH of the obtained concentrated juice of Germinatus Phragmitis to 4.0 + -0.1 with sodium citrate; cooling and then aseptic filling; sterilizing the obtained product in a sterilizing device for concentrated asparagus juice with water temperature of 100 deg.C, radio frequency distance of 30cm, radio frequency of 27.12MHz, and sterilizing time of 20 min. The prepared asparagus concentrated juice is different from the conventional juiced product, and the preparation method provided by the invention is applied, so that the asparagus saponin preservation rate is improved by 50% -60%, and the preparation quality and the added value of the product are further improved.

The asparagus by-products of the invention are stems, roots and leaves.

The asparagus concentrated juice prepared by the preparation method provided by the invention has the advantages that the average particle size of the final product reaches 10 mu m, the final product contains a plurality of nutrients such as dietary fibers and the like which cannot be dissolved in the conventional juice products, the preservation rate of the asparagus saponin is improved by 50% -60%, and the additional value of the concentrated juice product is effectively improved.

Compared with the prior art, the asparagus concentrated juice preparation method and the asparagus concentrated juice sterilization device for improving the asparagus saponin preservation rate can realize the following beneficial effects: (1) the preparation method of the asparagus saponin juice takes the byproducts of the asparagus as raw materials, breaks through the key technology of the radio frequency-water bath combined sterilization high efficiency of the asparagus stem byproduct concentrated juice with industrial significance, and the prepared asparagus juice is different from the conventional juiced product, and the application of the radio frequency-water bath combined sterilization method improves the asparagus saponin preservation rate by 50-60%, and further improves the added value of the product. (2) The bagged asparagus concentrated juice is subjected to radio frequency sterilization in a water bath environment, so that the problem of good uniformity of radio frequency heating temperature is solved, and retention of asparagus saponin in asparagus powder is facilitated while sterilization is performed.

The asparagus concentrated juice sterilizing device is designed based on the principle of radio frequency-water bath combined sterilization, and when the filling product obtained according to the step S6 is placed in the asparagus concentrated juice sterilizing device for sterilization, the water temperature of the water tank 2, the radio frequency distance of the radio frequency generator 3, the radio frequency and the sterilization time are controlled. Then, the control part controls the conveyor belt and the radio frequency generator to start, the control part can control the starting and stopping of the conveyor belt and speed adjustment, and the control part can control the starting and stopping of the radio frequency generator and frequency adjustment. When sterilization is carried out, bagged asparagus concentrated juice formed after sterile filling is input from a feeding hole, the bagged asparagus concentrated juice is conveyed towards a discharging hole through a conveying belt, and in the conveying process, the bagged asparagus concentrated juice is soaked in water passing through a water tank and is subjected to radio frequency treatment by a radio frequency generator, so that the radio frequency-water bath combined sterilization treatment is realized. The asparagus concentrated juice formed by the treatment is different from the conventional juiced product, so that the asparagus saponin preservation rate is improved by 50-60%, and the added value of the product is improved. The preparation method of the asparagus concentrated juice for improving the asparagus saponin storage rate has simple steps, effectively breaks through the radio frequency-water bath combined sterilization high-efficiency key technology of the asparagus by-product concentrated juice with industrial significance in the preparation process of the asparagus concentrated juice, and the prepared asparagus concentrated juice is different from the conventional juiced product, so that the sterilization quality of the asparagus concentrated juice is improved, the asparagus saponin storage rate is improved by 50-60%, the preparation efficiency is improved, the added value of the product is comprehensively improved, and the taste of the product is improved.

The present invention has been described in connection with the accompanying drawings, and it is to be understood that the invention is not limited to the specific embodiments disclosed, but is intended to cover various modifications, changes and equivalents of the embodiments of the invention, and its application to other applications without departing from the spirit and scope of the invention.