Nutritional yoghurt for infants and preparation process of nutritional yoghurt

Abstract

The invention discloses infant nutritional yoghurt and a preparation process thereof, and relates to the technical field of infant food. The preparation method comprises the following steps: S1, preparing fermented milk; S2, treating fresh fruits; S3, stirring the raw materials; S4, performing sterilization and sterile treatment; according to the preparation method disclosed by the invention, through the preparation processes of S1-S5, four edible fungi for infants are adopted in the raw materials for low-temperature fermentation, so that the nutritional value of the prepared fresh fruit yoghurt is improved, the development and growth of infants are facilitated, and meanwhile, the quality and taste of the fresh fruit yoghurt are improved through the matching of the yoghurt and the fruits; two pushing rings in the shaking mechanism are driven to horizontally move in a reciprocating mode, the two pushing rings enable a stirring tank to shake in a reciprocating mode with the axis of a rotating shaft as the circle center through two pushing rods and two cambered surface pushing plates, and the stirring tank shakes raw materials in the stirring process in the reciprocating shaking process. Therefore, the fresh fruit yoghourt raw materials can be conveniently shaken up in the stirring process, and the stirring effect and the stirring efficiency of the fresh fruit yoghourt raw materials are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of baby food, in particular to a nutritious yogurt for infants and a preparation process thereof. Background Art

[0002] Fresh fruit yogurt is a kind of yogurt, mainly made of fruit and yogurt, with a sweet taste and a sweet flavor. It can regulate the body's skills and enhance immunity. However, there are still some problems in the fresh fruit yogurt prepared by the prior art and in the preparation process: 1. The fresh fruit yogurt prepared by the prior art contains lactic acid bacteria that are not suitable for infants and young children to eat. The fruits are mostly jams or juices, and the overall nutritional value is low. The bacteria are not suitable for the intestines of infants and young children, which is not conducive to the development and growth of infants and young children. 2. In the process of stirring the fresh fruit yogurt raw materials in the existing technology, the stirring method of the stirrer is relatively simple, resulting in poor stirring effect of the fresh fruit yogurt raw materials. At the same time, it takes a long time to stir the fresh fruit yogurt, which has a certain impact on the stirring efficiency of the fresh fruit yogurt. In view of the above problems, the inventors proposed a nutritious yogurt for infants and young children and a preparation process thereof to solve the above problems. Summary of the invention

[0003] In order to solve the problems of low nutritional value of fresh fruit yogurt prepared in the prior art and poor stirring effect and low stirring efficiency of fresh fruit yogurt raw materials; the purpose of the present invention is to provide a nutritious yogurt for infants and young children and a preparation process thereof.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a nutritious yogurt for infants and young children, which is composed of the following ingredients: 400-500 parts of fermented milk, 100-120 parts of pears, 30-50 parts of concentrated pear juice, 20-30 parts of starch, 20-30 parts of citrus fiber and 50-60 parts of whey protein powder.

[0005] Preferably, the fermented milk is fermented from raw cow's milk, Bifidobacterium animalis subspecies lactis HN019, Lactobacillus mucilaginosus CECT5716, Lactobacillus rhamnosus HN001 and Bifidobacterium breve M-16V.

[0006] A preparation process of infant nutritional yogurt comprises the following steps: S1. Preparation of fermented milk Add pasteurized raw milk, Bifidobacterium animalis subsp. lactis HN019, Lactobacillus mucilaginosus CECT5716, Lactobacillus rhamnosus HN001 and Bifidobacterium breve M-16V into a fermentation tank for fermentation, and after fermentation, transfer to refrigeration for standby use; S2. Fresh fruit processing Wash the pears in the raw materials, peel and core them, then add the pears into the pulp chopping equipment, cut the pears into granules, and then pass through the filtering equipment to filter out the rough stone cells, and then pass through the high shear emulsifier and high-pressure homogenizer for double homogenization to obtain a delicate and smooth fresh pear puree for use; S3, raw material mixing Pour the fermented milk prepared in S1, the fresh pear puree, the concentrated pear juice, the starch, the citrus fiber and the whey protein powder in S2 into a stirring device, and stir the added raw materials evenly to obtain a nutritious yogurt for infants and young children; S4. Sterilization and aseptic treatment Sterilization The infant nutritional yogurt is sterilized by pasteurization, with the temperature set at 70-90°C and the sterilization time set at 10-30 minutes.

[0007] Commercially sterile The manufactured infant nutritional yogurt is placed in a room temperature semi-finished product warehouse for ten days for commercial sterility testing and factory inspection.

[0008] S5. Testing and packaging After the factory inspection report is qualified and commercial sterility is passed, the canned infant nutritional yogurt is tested with food metal detection equipment, unqualified products are removed, and then the qualified products are packaged and stored in a constant temperature and humidity finished product warehouse.

[0009] Preferably, the stirring equipment comprises an equipment tank, a stirring tank and a tank cover, the stirring tank is located inside the equipment tank, a first frame plate is fixedly installed on the upper end of the equipment tank, one end of the first frame plate is fixedly connected to the upper surface of the tank cover, two rotating shafts are fixedly installed on one end of the stirring tank, the ends of the two rotating shafts away from the stirring tank are rotatably connected to the inner wall of the equipment tank, a discharge pipe is fixedly installed on the end of the stirring tank away from the rotating shaft, a filling hopper is fixedly installed on the upper surface of the tank cover, a stirring mechanism is provided on the tank cover, and a shaking mechanism is provided between the equipment tank and the stirring tank.

[0010] Preferably, the stirring mechanism includes a first stirring rod and two second stirring rods, one end of the first stirring rod is rotatably connected to the axial position of the tank cover, a plurality of evenly distributed first stirring paddles are fixedly installed on the first stirring rod, and a plurality of evenly distributed second stirring paddles are fixedly installed on the two second stirring rods, a circular slide rail is fixedly installed on the inner wall of the tank cover, two arc-shaped sliders are slidably installed on the circular slide rail, one end of one of the second stirring rods is rotatably connected to the lower surface of a arc-shaped slider, and two connecting rods are fixedly installed on one end of the first stirring rod, one end of one of the connecting rods is fixedly connected to one side of a arc-shaped slider.

[0011] Preferably, a transmission gear is fixedly installed at one end of each of the two second stirring rods, two fixed rods are fixedly installed on the inner wall of the tank cover, an inner gear ring is fixedly installed between the two fixed rods, the inner gear ring is coaxial with the circular slide rail, and the inner gear ring is meshed with the two transmission gears, a servo motor is fixedly installed at one end of the first frame plate, and the drive output end of the servo motor is fixedly connected to one end of the first stirring rod.

[0012] Preferably, the shaking mechanism includes two pushing rings, one side of the two pushing rings is fixedly mounted with a pushing rod, one end of the two pushing rods is fixedly mounted with an arcuate pushing plate, the side of the arcuate pushing plate away from the pushing rod is in movably contact with the outer wall of the stirring tank, both sides of the equipment tank are fixedly mounted with a second frame plate, one end of the two second frame plates are fixedly mounted with two guide rods, the upper and lower surfaces of the two pushing rings are fixedly mounted with connecting seats, and the connecting seats are slidably connected to the guide rods.

[0013] Preferably, the top walls of the two push rings are fixedly mounted with a plurality of evenly distributed first teeth, the bottom walls of the two push rings are fixedly mounted with a plurality of evenly distributed second teeth, a rotating rod is rotatably mounted in the middle of the two second frame plates, and a half-gear is fixedly mounted at one end of the two rotating rods, and the half-gear is meshingly connected with the first teeth.

[0014] Preferably, a synchronous wheel is fixedly mounted on the other end of the two rotating rods, a synchronous belt is installed for transmission between the two synchronous wheels, a transmission rod is rotatably mounted on the upper surface of the tank cover, a transmission wheel is fixedly mounted on one end of the transmission rod and the middle part of one of the rotating rods, a transmission belt is installed for transmission between the two transmission wheels, a bevel gear is fixedly mounted on one end of the first stirring rod and the other end of the transmission rod, and the two bevel gears are meshed with each other.

[0015] Preferably, the shaking mechanism also includes a flexible connecting ring, the upper end of the flexible connecting ring is fixedly connected to the lower surface of the tank cover, the lower end of the flexible connecting ring is fixedly installed with a rubber sealing ring, the upper end of the mixing tank is provided with a sealing groove, and the rubber sealing ring is fixedly connected to the inner wall of the sealing groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, through the preparation processes S1-S5, four kinds of edible fungi for infants and young children are used in the raw materials for low-temperature fermentation, so as to improve the nutritional value of the prepared fresh fruit yogurt, which is beneficial to the development and growth of infants and young children. At the same time, the combination of yogurt and fruit improves the quality and taste of the fresh fruit yogurt; 2. In the present invention, the first stirring paddle in the stirring mechanism is driven to rotate, and the second stirring paddle is driven to revolve and rotate at the same time. The rotation of the first stirring paddle and the revolution and rotation of the second stirring paddle fully stir the raw materials in the stirring tank, thereby improving the stirring effect and stirring efficiency of the fresh fruit yogurt raw materials; 3. In the present invention, by driving the two push rings in the shaking mechanism to move reciprocatingly horizontally, the two push rings make the stirring tank rock back and forth with the axis of the rotating shaft as the center of the circle through two push rods and two arc-surface push plates. The stirring tank shakes the raw materials in the stirring process during the reciprocating rocking process, thereby conveniently achieving the shaking of the fresh fruit yogurt raw materials in the stirring process, and further improving the stirring effect and stirring efficiency of the fresh fruit yogurt raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The present invention is a flow chart of a process for preparing a nutritious yogurt for infants.

[0019] Figure 2 It is a schematic diagram of the overall structure of the stirring device of the present invention.

[0020] Figure 3 Another schematic diagram of the overall structure of the stirring device of the present invention.

[0021] Figure 4 It is a schematic diagram of the cutaway structure of the equipment tank of the present invention.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the stirring tank and the connection structure of the stirring mechanism of the present invention.

[0023] Figure 6 For the present invention Figure 5 A magnified schematic diagram of part A in FIG.

[0024] Figure 7 It is a schematic diagram of the connection structure of the stirring mechanism and the shaking mechanism of the present invention.

[0025] Figure 8 For the present invention Figure 7 An enlarged schematic diagram of part B in FIG.

[0026] Fig. 9 For the present invention Figure 7 Enlarged schematic diagram of part C in FIG.

[0027] In the figure: 1, equipment tank; 11, first frame plate; 2, mixing tank; 21, rotating shaft; 22, discharge pipe; 3, tank cover; 31, filling bucket; 4, stirring mechanism; 41, first stirring rod; 42, first stirring paddle; 43, second stirring rod; 44, second stirring paddle; 45, circular slide rail; 46, arc slide block; 48, connecting rod; 49, transmission gear; 5, fixing rod; 51, inner gear ring; 52, servo motor; 6, shake Mechanism; 61, push ring; 611, push rod; 612, arc push plate; 62, second frame plate; 63, guide rod; 64, connecting seat; 65, first tooth; 66, second tooth; 67, rotating rod; 68, half gear; 69, synchronous wheel; 7, synchronous belt; 71, transmission rod; 72, transmission wheel; 73, transmission belt; 74, bevel gear; 75, sealing groove; 76, rubber sealing ring; 77, flexible connecting ring. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0029] Example: Figure 1-9 As shown, the present invention provides a nutritional yogurt for infants and young children, which is composed of the following ingredients according to the composition: 400-500 parts of fermented milk, 100-120 parts of pears, 30-50 parts of concentrated pear juice, 20-30 parts of starch, 20-30 parts of citrus fiber and 50-60 parts of whey protein powder.

[0030] The fermented milk is fermented from raw cow's milk, animal bifidobacterium lactis subspecies HN019, fermented lactobacillus mucilaginosus CECT5716, rhamnosus lactobacillus HN001 and bifidobacterium breve M-16V.

[0031] The present invention also provides a preparation process of infant nutritional yogurt, comprising the following steps: S1. Preparation of fermented milk Add pasteurized raw milk, Bifidobacterium animalis subsp. lactis HN019, Lactobacillus mucilaginosus CECT5716, Lactobacillus rhamnosus HN001 and Bifidobacterium breve M-16V into a fermentation tank for fermentation, and after fermentation, transfer to refrigeration for standby use; S2. Fresh fruit processing Wash the pears in the raw materials, peel and core them, then add the pears into the pulp chopping equipment, cut the pears into granules, and then pass through the filtering equipment to filter out the rough stone cells, and then pass through the high shear emulsifier and high-pressure homogenizer for double homogenization to obtain a delicate and smooth fresh pear puree for use; S3, raw material mixing Pour the fermented milk prepared in S1, the fresh pear puree, the concentrated pear juice, the starch, the citrus fiber and the whey protein powder in S2 into a stirring device, and stir the added raw materials evenly to obtain a nutritious yogurt for infants and young children; S4. Sterilization and aseptic treatment Sterilization The infant nutritional yogurt is sterilized by pasteurization, with the temperature set at 70-90°C and the sterilization time set at 10-30 minutes.

[0032] Commercially sterile The manufactured infant nutritional yogurt is placed in a room temperature semi-finished product warehouse for ten days for commercial sterility testing and factory inspection.

[0033] S5. Testing and packaging After the factory inspection report is qualified and commercial sterility is passed, the canned infant nutritional yogurt is tested with food metal detection equipment, unqualified products are removed, and then the qualified products are packaged and stored in a constant temperature and humidity finished product warehouse.

[0034] The stirring device comprises an equipment tank 1, a stirring tank 2 and a tank cover 3, wherein the stirring tank 2 is located inside the equipment tank 1, a first frame plate 11 is fixedly mounted on the upper end of the equipment tank 1, one end of the first frame plate 11 is fixedly connected to the upper surface of the tank cover 3, two rotating shafts 21 are fixedly mounted on one end of the stirring tank 2, one end of the two rotating shafts 21 away from the stirring tank 2 is rotatably connected to the inner wall of the equipment tank 1, a discharge pipe 22 is fixedly mounted on the end of the stirring tank 2 away from the rotating shaft 21, a filling hopper 31 is fixedly mounted on the upper surface of the tank cover 3, a stirring mechanism 4 is arranged on the tank cover 3, and a The shaking mechanism 6 is provided with a filling hopper 31, which makes it convenient for the operator to add the fresh fruit yogurt raw materials to be stirred into the interior of the stirring tank 2. By providing a discharge pipe 22, the fresh fruit yogurt raw materials after stirring are discharged through the discharge pipe 22. By providing a stirring mechanism 4, the stirring mechanism 4 can fully stir the fresh fruit yogurt raw materials in the stirring tank 2, thereby improving the stirring effect of the fresh fruit yogurt raw materials. By providing a shaking mechanism 6, the shaking mechanism 6 can make the stirring tank 2 shake with the axis of the rotating shaft 21 as the center of the circle, and the fresh fruit yogurt in the stirring tank 2 is shaken away, thereby further improving the stirring effect of the fresh fruit yogurt, and at the same time, can improve the stirring efficiency of the fresh fruit yogurt raw materials.

[0035] The stirring mechanism 4 includes a first stirring rod 41 and two second stirring rods 43, one end of the first stirring rod 41 is rotatably connected to the axial position of the tank cover 3, a plurality of first stirring paddles 42 evenly distributed are fixedly installed on the first stirring rod 41, and a plurality of second stirring paddles 44 evenly distributed are fixedly installed on the two second stirring rods 43, a circular slide rail 45 is fixedly installed on the inner wall of the tank cover 3, and two arc-shaped sliders 46 are slidably installed on the circular slide rail 45, one end of which is rotatably connected to the lower surface of an arc-shaped slider 46, and one end of the first stirring rod 41 is fixedly installed with two connecting rods 48, one end of which is connected to an arc-shaped slider One side of the slider 46 is fixedly connected, and by driving the first stirring rod 41 to rotate, and driving the two second stirring rods 43 to revolve and rotate, the first stirring rod 41 causes the first stirring paddle 42 to rotate, and the two second stirring rods 43 cause the two second stirring paddles 44 to revolve and rotate. The rotation of the first stirring paddle 42 and the revolution and rotation of the two second stirring paddles 44 fully stir the fresh fruit yogurt raw materials in the stirring tank 2. When the first stirring rod 41 rotates, the first stirring rod 41 can make the two arc-shaped sliders 46 slide with the axis of the circular slide rail 45 as the center of the circle through the two connecting rods 48, and the two arc-shaped sliders 46 cause the two second stirring rods 43 and the two second stirring paddles 44 to revolve with the axis of the circular slide rail 45 as the center of the circle.

[0036] One end of the two second stirring rods 43 is fixedly installed with a transmission gear 49, and two fixed rods 5 are fixedly installed on the inner wall of the tank cover 3, and an internal gear ring 51 is fixedly installed between the two fixed rods 5, and the internal gear ring 51 is coaxial with the circular slide rail 45, and the internal gear ring 51 is meshed with the two transmission gears 49. A servo motor 52 is fixedly installed at one end of the first frame plate 11, and the driving output end of the servo motor 52 is fixedly connected to one end of the first stirring rod 41. By arranging the transmission gear 49 and the internal gear ring 51, when the second stirring rod 43 and the second stirring paddle 44 revolve, the transmission gear 49 follows the synchronous revolving, and the internal gear ring 51 drives the transmission gear 49 to rotate, and the transmission gear 49 can make the second stirring rod 43 and the second stirring paddle 44 rotate, and by turning on the servo motor 52, the driving shaft of the servo motor 52 can rotate the first stirring rod 41.

[0037] The shaking mechanism 6 includes two pushing rings 61, one side of the two pushing rings 61 is fixedly installed with a pushing rod 611, one end of the two pushing rods 611 is fixedly installed with a curved pushing plate 612, the side of the curved pushing plate 612 away from the pushing rod 611 is in active contact with the outer wall of the stirring tank 2, the two sides of the equipment tank 1 are fixedly installed with a second frame plate 62, one end of the two second frame plates 62 are fixedly installed with two guide rods 63, the upper and lower surfaces of the two pushing rings 61 are fixedly installed with a connecting seat 64, the connecting seat 64 is slidably connected to the guide rod 63, and by driving the two pushing rings 61 to move horizontally in one direction at the same time, the two The push ring 61 makes the stirring tank 2 move horizontally in one direction through two push rods 611 and two curved push plates 612, and the stirring tank 2 swings around the axis of the rotating shaft 21. When the two push rings 61 move back and forth horizontally synchronously, the two push rings 61 make the stirring tank 2 swing back and forth through the two push rods 611 and two curved push plates 612. By setting a guide rod 63 and a connecting seat 64, the guide rod 63 guides the push ring 61 in the horizontal direction through the connecting seat 64, so that the push ring 61 keeps moving in the horizontal direction. It should be noted that the amplitude of the reciprocating swing of the stirring tank 2 does not conflict with the first stirring paddle 42 and the second stirring paddle 44 in the stirring tank 2.

[0038] The top walls of the two pushing rings 61 are fixedly mounted with a plurality of evenly distributed first teeth 65, the bottom walls of the two pushing rings 61 are fixedly mounted with a plurality of evenly distributed second teeth 66, the middle parts of the two second frame plates 62 are rotatably mounted with a rotating rod 67, one end of the two rotating rods 67 is fixedly mounted with a half gear 68, the half gear 68 is meshingly connected with the first teeth 65, by driving the rotating rod 67 to rotate, the rotating rod 67 causes the half gear 68 to rotate, and the half gear 68 causes the pushing ring 61 to reciprocate horizontally through the first teeth 65 and the second teeth 66.

[0039] The other ends of the two rotating rods 67 are fixedly installed with synchronous wheels 69, and a synchronous belt 7 is installed for transmission between the two synchronous wheels 69. A transmission rod 71 is rotatably installed on the upper surface of the tank cover 3, and a transmission wheel 72 is fixedly installed on one end of the transmission rod 71 and the middle part of one of the rotating rods 67, and a transmission belt 73 is installed for transmission between the two transmission wheels 72. A bevel gear 74 is fixedly installed on one end of the first stirring rod 41 and the other end of the transmission rod 71, and the two bevel gears 74 are meshed with each other. When the first stirring rod 41 rotates, the first stirring rod 41 can rotate the transmission rod 71 through the two bevel gears 74, and the transmission rod 71 can rotate one rotating rod 67 through the two transmission wheels 72 and the transmission belt 73. One rotating rod 67 can keep the two rotating rods 67 rotating synchronously in the same direction through two synchronous wheels 69 and the synchronous belt 7.

[0040] The shaking mechanism 6 also includes a flexible connecting ring 77, the upper end of the flexible connecting ring 77 is fixedly connected to the lower surface of the tank cover 3, the lower end of the flexible connecting ring 77 is fixedly installed with a rubber sealing ring 76, the upper end of the stirring tank 2 is provided with a sealing groove 75, and the rubber sealing ring 76 is fixedly connected to the inner wall of the sealing groove 75. By arranging the flexible connecting ring 77 and the rubber sealing ring 76, the stirring tank 2 and the tank cover 3 will not conflict during the reciprocating shaking process.

[0041] Working principle: Through the preparation process of S1-S5, four kinds of edible fungi for infants and young children are used in the raw materials for low-temperature fermentation to improve the nutritional value of the prepared fresh fruit yogurt, which is beneficial to the development and growth of infants and young children. At the same time, the combination of yogurt and fruit improves the quality and taste of fresh fruit yogurt; When the raw materials for preparing fresh fruit yogurt need to be stirred, the operator firstly adds the raw materials to be stirred into the stirring tank 2 through the filling bucket 31, and then turns on the servo motor 52. The driving shaft of the servo motor 52 rotates the first stirring rod 41, and the first stirring rod 41 rotates the first stirring paddle 42. At the same time, the first stirring rod 41 causes the two arc-shaped sliders 46 to slide with the axis of the circular slide rail 45 as the center of the circle through the two connecting rods 48. The two arc-shaped sliders 46 cause the two second stirring rods 43 and the two transmission gears 44 to rotate. 9 and the two second stirring paddles 44 revolve around the axis of the circular slide rail 45, the inner gear ring 51 drives the two transmission gears 49 to rotate, and the two transmission gears 49 make the two second stirring rods 43 and the two second stirring paddles 44 rotate. At this time, the first stirring paddle 42 rotates, and the two second stirring paddles 44 revolve and rotate. The rotation of the first stirring paddle 42 and the revolution and rotation of the two second stirring paddles 44 fully stir the raw materials in the stirring tank 2, thereby improving the stirring effect and stirring efficiency of the fresh fruit yogurt raw materials; At the same time, the first stirring rod 41 rotates the transmission rod 71 through the two bevel gears 74, and the transmission rod 71 rotates the corresponding rotating rod 67 through the two transmission wheels 72 and the transmission belt 73. One rotating rod 67 rotates the other rotating rod 67 synchronously in the same direction through the two synchronous wheels 69 and the synchronous belt 7. The two rotating rods 67 rotate the two half-side gears 68. The two half-side gears 68 make the two push rings 61 move back and forth horizontally in the same direction synchronously through the corresponding first teeth 65 and the corresponding second teeth 66. The two push rings 61 make the stirring tank 2 reciprocate around the axis of the rotating shaft 21 as the center of the circle through the two push rods 611 and the two arc-surface push plates 612. The stirring tank 2 shakes the raw materials in the stirring process during the reciprocating shaking process, thereby conveniently realizing the shaking of the fresh fruit yogurt raw materials in the stirring process, and further improving the stirring effect and stirring efficiency of the fresh fruit yogurt raw materials.

[0042] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A nutritional yogurt for infants and young children, characterized in that: According to the composition, it is composed of the following ingredients: 200-300 parts of fermented milk for infants and young children, 100-120 parts of pears, 30-50 parts of concentrated pear juice, 5-15 parts of starch, 5-15-30 parts of citrus fiber and 20-40 parts of whey protein powder.

2. The preparation process of the infant nutritional yogurt according to claim 1, characterized in that: The probiotic fermented milk for infants is fermented from raw cow milk, animal bifidobacterium lactis subspecies HN019, fermented mucus lactobacillus CECT5716, rhamnosus lactobacillus HN001 and bifidobacterium breve M-16V.

3. A process for preparing the infant nutritional yogurt according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Preparation of fermented milk Add pasteurized raw milk, Bifidobacterium animalis subsp. lactis HN019, Lactobacillus mucilaginosus CECT5716, Lactobacillus rhamnosus HN001 and Bifidobacterium breve M-16V into a fermentation tank for fermentation, and after fermentation, transfer to refrigeration for standby use; S2. Fresh fruit processing Wash the pears in the raw materials, peel and core them, then add the pears into the pulp chopping equipment, cut the pears into granules, and then pass through the filtering equipment to filter out the rough stone cells, and then pass through the high shear emulsifier and high-pressure homogenizer for double homogenization to obtain a delicate and smooth fresh pear puree for use; S3, raw material mixing Pour the fermented milk prepared in S1, the fresh pear puree, the concentrated pear juice, the starch, the citrus fiber and the whey protein powder in S2 into a stirring device, and stir the added raw materials evenly to obtain a nutritious yogurt for infants and young children; S4. Sterilization and aseptic treatment Sterilization The infant nutrition yogurt is sterilized by pasteurization, the temperature is set at 70-90℃, and the sterilization time is 10-30min; Commercially sterile The finished infant nutrition yogurt is placed in a room temperature semi-finished product warehouse for 10 days for commercial sterility testing and factory inspection; S5. Testing and packaging After the factory inspection report is qualified and commercial sterility is passed, the canned infant nutritional yogurt is tested with food metal detection equipment, unqualified products are removed, and then the qualified products are packaged and stored in a constant temperature and humidity finished product warehouse.

4. The process for preparing the nutritional yogurt for infants and young children according to claim 3, characterized in that: The stirring device comprises an equipment tank (1), a stirring tank (2) and a tank cover (3); the stirring tank (2) is located inside the equipment tank (1); a first frame plate (11) is fixedly mounted on the upper end of the equipment tank (1); one end of the first frame plate (11) is fixedly connected to the upper surface of the tank cover (3); two rotating shafts (21) are fixedly mounted on one end of the stirring tank (2); one end of the two rotating shafts (21) away from the stirring tank (2) is rotatably connected to the inner wall of the equipment tank (1); a discharge pipe (22) is fixedly mounted on one end of the stirring tank (2) away from the rotating shafts (21); a filling hopper (31) is fixedly mounted on the upper surface of the tank cover (3); a stirring mechanism (4) is provided on the tank cover (3); and a shaking mechanism (6) is provided between the equipment tank (1) and the stirring tank (2).

5. The process for preparing a nutritional yogurt for infants and young children as claimed in claim 4, characterized in that: The stirring mechanism (4) comprises a first stirring rod (41) and two second stirring rods (43); one end of the first stirring rod (41) is rotatably connected to the axis of the tank cover (3); a plurality of evenly distributed first stirring paddles (42) are fixedly mounted on the first stirring rod (41); a plurality of evenly distributed second stirring paddles (44) are fixedly mounted on the two second stirring rods (43); a circular slide rail (45) is fixedly mounted on the inner wall of the tank cover (3); two arc-shaped sliders (46) are slidably mounted on the circular slide rail (45); one end of one of the second stirring rods (43) is rotatably connected to the lower surface of a arc-shaped slider (46); and two connecting rods (48) are fixedly mounted on one end of the first stirring rod (41); one end of one of the connecting rods (48) is fixedly connected to one side of a arc-shaped slider (46).

6. The process for preparing the nutritional yogurt for infants and young children according to claim 5, characterized in that: A transmission gear (49) is fixedly mounted on one end of each of the two second stirring rods (43); two fixed rods (5) are fixedly mounted on the inner wall of the tank cover (3); an inner gear ring (51) is fixedly mounted between the two fixed rods (5); the inner gear ring (51) is coaxial with the circular slide rail (45); the inner gear ring (51) is meshingly connected to the two transmission gears (49); a servo motor (52) is fixedly mounted on one end of the first frame plate (11); a drive output end of the servo motor (52) is fixedly connected to one end of the first stirring rod (41).

7. The process for preparing the nutritional yogurt for infants and young children according to claim 5, characterized in that: The shaking mechanism (6) comprises two push rings (61), one side of each of the two push rings (61) is fixedly mounted with a push rod (611), one end of each of the two push rods (611) is fixedly mounted with a curved push plate (612), a side of the curved push plate (612) away from the push rod (611) is in movable contact with an outer wall of the stirring tank (2), both sides of the equipment tank (1) are fixedly mounted with a second frame plate (62), one end of each of the two second frame plates (62) is fixedly mounted with two guide rods (63), and upper and lower surfaces of each of the two push rings (61) are fixedly mounted with a connecting seat (64), and the connecting seat (64) is slidably connected to the guide rod (63).

8. The process for preparing the nutritional yogurt for infants and young children according to claim 7, characterized in that: The top walls of the two push rings (61) are fixedly mounted with a plurality of evenly distributed first teeth (65), the bottom walls of the two push rings (61) are fixedly mounted with a plurality of evenly distributed second teeth (66), the middle parts of the two second frame plates (62) are rotatably mounted with a rotating rod (67), one end of the two rotating rods (67) is fixedly mounted with a half gear (68), and the half gear (68) is meshingly connected with the first teeth (65).

9. The process for preparing a nutritional yogurt for infants and young children according to claim 8, characterized in that: A synchronous wheel (69) is fixedly mounted on the other ends of the two rotating rods (67), a synchronous belt (7) is installed between the two synchronous wheels (69) for transmission, a transmission rod (71) is rotatably mounted on the upper surface of the tank cover (3), a transmission wheel (72) is fixedly mounted on one end of the transmission rod (71) and the middle of one of the rotating rods (67), a transmission belt (73) is installed between the two transmission wheels (72), and a bevel gear (74) is fixedly mounted on one end of the first stirring rod (41) and the other end of the transmission rod (71), and the two bevel gears (74) are meshed with each other.

10. The process for preparing the nutritional yogurt for infants and young children according to claim 4, characterized in that: The shaking mechanism (6) further comprises a flexible connecting ring (77), the upper end of the flexible connecting ring (77) being fixedly connected to the lower surface of the tank cover (3), the lower end of the flexible connecting ring (77) being fixedly mounted with a rubber sealing ring (76), the upper end of the stirring tank (2) being provided with a sealing groove (75), and the rubber sealing ring (76) being fixedly connected to the inner wall of the sealing groove (75).

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