A fermentation device for dry choke yogurt production

Abstract

The application belongs to the technical field of enzymology or microbiology devices, and particularly relates to a fermentation device for dry choking yogurt production, which comprises a fermentation tank, a connecting shell is fixed at the top end of the fermentation tank, a speed reducer motor is installed at the top end of the connecting shell, a feeding port is fixed at one side of the top end of the fermentation tank, an inner container is arranged in the fermentation tank, a plurality of micropores are arranged at equal intervals on the outer side of the inner container, a liquid discharge pipe is fixed at one side of the bottom end of the fermentation tank, and a discharge port is arranged at the bottom end of the fermentation tank; a stirring rod is arranged in the inner container, a plurality of connecting blocks are fixed to the outer side of the stirring rod, and a plurality of blades are rotatably connected to the outer side of the connecting blocks; the base material, streptococcus thermophilus and lactobacillus bulgaricus are fully mixed through the blades, lactobacillus bulgaricus secretes protease to perform enzymolysis on casein to form a gel network, the blade structure is matched with the lifting adjusting assembly, bidirectional material stirring of the base material can be realized without changing the stirring driving motor, and the mixing uniformity of the base material and the strains is improved.

Description

Technical Field

[0001] This invention belongs to the field of enzymology or microbiology device technology, specifically a fermentation device for producing dry yogurt. Background Technology

[0002] Dry yogurt is a high-protein dairy product that has become increasingly popular in the market in recent years. It is made from milk, which is sterilized and then fermented with lactic acid bacteria such as Streptococcus thermophilus and Lactobacillus bulgaricus. Under suitable temperatures, the lactic acid bacteria multiply rapidly and secrete proteases and lipases, which break down casein and milk fat in the milk into small peptides, amino acids, and free fatty acids, giving the product a unique flavor and delicate texture. After fermentation, some whey protein and lactose are removed through a dewhey process, resulting in a thick, creamy texture. All of the above fermentation and enzymatic reactions must be carried out in specialized enzymology or microbiology equipment. The temperature field distribution inside the equipment, the contact efficiency between the bacteria and the raw materials, and the stirring method during fermentation directly affect the enzyme activity and metabolic rate of the lactic acid bacteria, thus determining the protein content, texture uniformity, and final quality of the dry yogurt.

[0003] A Chinese patent with publication number CN120570315B discloses a universal fermentation device, a yogurt production system, and a method for producing uric acid-lowering yogurt. The universal fermentation device includes a fermenter, a sampling tube, a test tube, a sliding component, a pressure detection module, and a processor. The pressure detection module is installed in the test tube. The sliding component is slidably fitted into the test tube and is connected to a first drive rod. The sliding component has a clearance opening, which is fitted with a sealing block. The sealing block is connected to a test rod and a second drive rod. One end of the sampling tube is connected to the fermenter, and the other end is connected to the test tube. The processor is used to determine the density and viscosity of the fermentation sample. It enables continuous monitoring of the fermentation system during fermentation, effectively avoiding sample contamination, improving the timeliness of analysis, and ensuring that the sample reflects a high degree of consistency with the original fermentation system. It is suitable for various fermentation scenarios.

[0004] The above-mentioned technical solution can only ferment ordinary yogurt. In the fermentation process of dry yogurt, the fermented yogurt needs to be transferred to a whey removal device for further processing. This process requires pumping, which will destroy the gel in the dry yogurt, resulting in a loose texture in the finished product.

[0005] Therefore, the present invention provides a fermentation apparatus for the production of dry yogurt. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The fermentation device for producing dry yogurt according to the present invention includes a fermentation tank, a connecting shell fixed to the top of the fermentation tank, a geared motor installed on the top of the connecting shell, a feed inlet fixed to one side of the top of the fermentation tank, an inner liner provided inside the fermentation tank, a plurality of micro-holes equally spaced on the outer side of the inner liner, a drain pipe fixed to one side of the bottom of the fermentation tank, and a discharge port provided at the bottom of the fermentation tank. The inner liner is equipped with a stirring rod, and multiple connecting blocks are fixed to the outside of the stirring rod. Multiple blades are rotatably connected to the outside of the connecting blocks. A rotating assembly is provided inside the connecting blocks to drive the blades to rotate. The maximum rotation angle of the blades is 135°. An adjustment assembly is provided at the top of the stirring rod.

[0008] Preferably, the rotating assembly includes a telescopic column slidably connected inside the stirring rod, a gear is fixed to the end of the rotating shaft of the blade, a gear frame is slidably connected inside the connecting block, one side of the gear frame is meshed with the gear, and the other end of the gear frame is fixedly connected to the telescopic column.

[0009] Preferably, the adjusting assembly includes a lifting frame rotatably connected to the top of the stirring rod, the lifting frame being slidably connected inside the connecting shell, a lead screw rotatably connected to one side of the connecting shell, the lead screw being threadedly connected to the lifting frame, a servo motor being installed on one side of the top of the connecting shell, the output shaft end of the servo motor being fixedly connected to the lead screw, a slide rod being fixed to the other side of the connecting shell, the other end of the lifting frame being slidably connected to the slide rod, and the top of the telescopic column being connected to the shaft end of the reduction motor through a connecting assembly.

[0010] Preferably, the connecting assembly includes a plug fixed to the end of the geared motor shaft, the telescopic column has a sliding cavity inside, the plug is slidably connected inside the sliding cavity of the telescopic column, a second spring is provided inside the sliding cavity, the bottom end of the second spring is fixedly connected to the bottom end of the sliding cavity, the top end of the second spring is fixedly connected to the bottom end of the plug, and a guide rod is fixedly fixed to the bottom end of the plug, the guide rod is inserted inside the telescopic column.

[0011] Preferably, the blade has a connecting surface on both sides, the inclined surfaces of the connecting surfaces on both sides face opposite directions, and the inclined surfaces on both sides of the connecting surface can be joined together.

[0012] Preferably, the blade has multiple telescopic holes at both the top and bottom ends, and protrusions are slidably connected inside the telescopic holes. The telescopic holes and protrusions are fitted with a clearance. The blade is equipped with a lifting component to drive the protrusions to extend and retract within the telescopic holes.

[0013] Preferably, the lifting assembly includes a pair of connecting frames slidably connected inside the blade, the connecting frames being fixedly connected to multiple protrusions, a telescopic rod slidably connected inside the blade, multiple guide frames being fixed outside the telescopic rod, the rod body of the connecting frame being slidably connected inside the guide frame, and a pushing structure being provided at one end of the telescopic rod; When the guide frame moves, it drives the connecting frame to rise and fall through the internal guide holes.

[0014] Preferably, the pushing structure includes a connecting post fixed to one end of the telescopic rod, the connecting post extending from the inside of the blade, and multiple sets of recesses formed on the outer side of the connecting block, the connecting post being able to be inserted into the inside of the recesses. A first spring is fixed to one end of the telescopic rod away from the connecting post, and the other end of the first spring is fixedly connected to the blade.

[0015] Preferably, the micropores are oblique holes, and the height of the micropores at the inner end of the inner liner is higher than the height of the micropores at the outer end of the inner liner.

[0016] Preferably, an ultrasonic transducer is installed on one side of the top of the inner liner, a slot is provided inside the discharge port, a fixing ring is fixed at the bottom of the inner liner, a rubber ring is sleeved on the outside of the fixing ring, and the rubber ring is placed inside the slot.

[0017] The beneficial effects of this invention are as follows: 1. The fermentation device for producing dry yogurt according to the present invention, through the cooperation of a rotatable and adjustable blade structure and a lifting and adjusting component, can realize bidirectional mixing of yogurt raw materials without changing the direction of the stirring drive motor, effectively improving the uniformity of mixing of raw materials and inoculum, and is easy to operate and control; after entering the static fermentation stage, adjacent blades can be joined together by connecting surfaces to form a multi-layer partition plate, which divides the yogurt inside the inner container into independent multi-layer spaces for whey separation. The lifting and lowering action of the partition plate can switch the contact position between the yogurt and the micropores on the side wall of the inner container. At the same time, combined with the obliquely set micropores and the periodic vibration of the ultrasonic transducer, the risk of micropores being blocked by protein coagulation can be effectively reduced.

[0018] 2. The fermentation device for producing dry yogurt according to the present invention features a retractable protrusion structure inside the blades. Triggered by the rotation of the blades, the protrusions automatically extend during stirring, increasing the contact resistance between the blades and the raw materials, enhancing the material agitation effect, and further improving mixing efficiency. During static fermentation and discharge, the protrusions automatically retract into the blades, without interfering with yogurt gel formation or hindering the discharge of the finished yogurt. Simultaneously, the blades can flexibly adjust their deflection angle, allowing for wider cleaning coverage during equipment cleaning by adjusting the angle in conjunction with the stirring and rotation. Attached Figure Description

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the fermenter in this invention; Figure 3 This is a schematic diagram of the blade stirring state in this invention; Figure 4 This is a schematic diagram of the gear frame structure in this invention; Figure 5 This is a schematic diagram of the internal structure of the telescopic column in this invention; Figure 6 This is a schematic diagram of the blades in the non-stirring state in this invention; Figure 7 This is a schematic diagram of the connecting frame structure in this invention; Figure 8 This is a schematic diagram of the telescopic rod structure in this invention; Figure 9 yes Figure 2 Enlarged view of a section at point A in the middle; Figure 10 This is a schematic diagram of a partial structure of the inner liner in this invention.

[0021] In the diagram: 1. Fermentation tank; 11. Gear motor; 111. Connecting shell; 112. Servo motor; 113. Lead screw; 114. Lifting frame; 12. Feed inlet; 13. Drain pipe; 14. Discharge port; 141. Slot; 15. Inner liner; 151. Ultrasonic transducer; 152. Fixing ring; 153. Rubber ring; 154. Micropore; 2. Stirring rod; 21. Blade; 211. Gear; 212. Protrusion; 213. Connecting frame; 214. Telescopic rod; 215. Connecting column; 216. Guide frame; 217. First spring; 218. Connecting surface; 22. Connecting block; 221. Recess; 23. Telescopic column; 231. Gear frame; 232. Insert column; 233. Second spring; 234. Guide rod. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] like Figures 1 to 5As shown in the figure, a fermentation device for producing dry yogurt according to an embodiment of the present invention includes a fermentation tank 1, a connecting shell 111 fixed to the top of the fermentation tank 1, a geared motor 11 installed on the top of the connecting shell 111, a feed inlet 12 fixed to one side of the top of the fermentation tank 1, an inner liner 15 provided inside the fermentation tank 1, a plurality of micro holes 154 equally spaced on the outer side of the inner liner 15, a drain pipe 13 fixed to one side of the bottom of the fermentation tank 1, and a discharge port 14 provided at the bottom of the fermentation tank 1. The inner liner 15 is equipped with a stirring rod 2. Multiple connecting blocks 22 are fixed to the outside of the stirring rod 2. Multiple blades 21 are rotatably connected to the outside of the connecting blocks 22. A rotating component is provided inside the connecting blocks 22 to drive the blades 21 to rotate. The maximum rotation angle of the blades 21 is 135°. An adjustment component is provided at the top of the stirring rod 2.

[0024] like Figures 3 to 5 As shown, the rotating assembly includes a telescopic column 23 slidably connected inside the stirring rod 2, a gear 211 fixed to the end of the rotating shaft of the blade 21, a gear frame 231 slidably connected inside the connecting block 22, one side of the gear frame 231 meshing with the gear 211, and the other end of the gear frame 231 fixedly connected to the telescopic column 23.

[0025] like Figure 5 As shown, the adjustment assembly includes a lifting frame 114 rotatably connected to the top of the stirring rod 2. The lifting frame 114 is slidably connected inside the connecting shell 111. A lead screw 113 is rotatably connected to one side of the connecting shell 111. The lead screw 113 and the lifting frame 114 are threadedly connected. A servo motor 112 is installed on one side of the top of the connecting shell 111. The output shaft end of the servo motor 112 is fixedly connected to the lead screw 113. A slide rod is fixed on the other side of the connecting shell 111. The other end of the lifting frame 114 is slidably connected to the slide rod. The top of the telescopic column 23 is connected to the shaft end of the reduction motor 11 through the connecting assembly.

[0026] like Figure 5 As shown, the connecting assembly includes a pin 232 fixed to the end of the shaft of the geared motor 11. A sliding cavity is provided inside the telescopic column 23. The pin 232 is slidably connected inside the sliding cavity of the telescopic column 23. A second spring 233 is provided inside the sliding cavity. The bottom end of the second spring 233 is fixedly connected to the bottom end of the sliding cavity, and the top end of the second spring 233 is fixedly connected to the bottom end of the pin 232. A guide rod 234 is fixedly fixed to the bottom end of the pin 232. The guide rod 234 is inserted inside the telescopic column 23.

[0027] like Figures 3 to 6 As shown, both sides of the blade 21 are provided with connecting surfaces 218, and the inclined surfaces of the connecting surfaces 218 on both sides face opposite directions, and the inclined surfaces on both sides of the connecting surfaces 218 can be joined together.

[0028] During fermentation, the drain pipe 13 and the discharge port 14 are connected to external equipment. Before fermentation, the drain pipe 13 and the discharge port 14 are sealed by the external equipment. Then, the base material obtained by pasteurizing whole milk and whey protein powder is poured into the inner tank 15 through the feed port 12. At the same time, pre-activated and cultured Streptococcus thermophilus and Lactobacillus bulgaricus starter culture is added. When poured in, the blades 21 show... Figure 3 In the state where all the base material is poured in, the reduction motor 11 is started to rotate. At this time, the reduction motor 11 drives the stirring rod 2 to rotate in one direction. The stirring rod 2 drives the connecting block 22 to rotate, and the connecting block 22 drives multiple blades 21 to rotate. Because multiple sets of blades 21 are set, the base material at different depths inside the inner liner 15 can be stirred. The stirring direction is consistent with the upward slope direction at this time, which allows the blades 21 to turn the base material inside the inner liner 15 upward. During the stirring process, the base material is fully mixed with Streptococcus thermophilus and Lactobacillus bulgaricus. After stirring for a period of time, The servo motor 112 is started, driving the lead screw 113 to rotate. The lead screw 113 drives the lifting frame 114 to move upward. At this time, the lifting frame 114 pushes the stirring rod 2 downward. Meanwhile, the elastic force of the second spring 233 keeps the telescopic column 23 in a fixed state, thus keeping the gear frame 231 in a fixed state. The stirring rod 2 drives the connecting block 22 to move downward. The connecting block 22 drives the blade 21 and the gear 211 to move downward. At this time, the gear 211 rolls on the tooth surface of the gear frame 231, causing the gear 211 to roll clockwise. When the blade 21 moves from... Figure 3 After rotating the state clockwise by 90°, the servo motor 112 stops rotating, so that the rotating surface of the blade 21 faces downward, causing the base material inside the inner liner 15 to be turned downward. By alternating and stirring in this way multiple times, the base material inside the inner liner 15 is stirred more evenly. At the same time, there is no need to change the rotation direction of the reduction motor 11, making the operation more convenient. During fermentation, heating devices are installed in layers along the height direction in the interlayer between fermenter 1 and inner liner 15. Layered temperature control creates a temperature gradient from top to bottom inside inner liner 15. The upper layer temperature is controlled at 43–45℃, the optimal growth temperature for thermophilic streptococci, promoting rapid proliferation and large-scale acid production. The lower layer temperature is controlled at 40–42℃, the optimal enzyme production temperature for Lactobacillus bulgaricus, promoting the secretion of proteases to enzymatically hydrolyze casein. The synergistic metabolism of the two strains lowers the system pH to near the isoelectric point of casein, causing casein micelles to aggregate and form a gel network structure. This process is completed within 3–5 minutes of fermentation. After the clock stops, the rotation of the reduction motor 11 is stopped. At this time, the substrate and bacteria inside the inner liner 15 are mixed evenly. Then the substrate needs to be left to stand for 6 to 8 hours. During this process, the substrate needs to be kept still to prevent the protein gel from breaking due to stirring. During the standing process, the protease secreted by Lactobacillus bulgaricus continues to modify and reorganize the gel structure, making the gel network more dense and uniform. At the same time, the precipitated whey will be output through the micropores 154 into the interlayer between the fermenter 1 and the inner liner 15. The whey will enter the interlayer and gather at the bottom of the fermenter 1 and be input into the drain pipe 13. At this time, the output whey can be collected by external equipment. During this process, as lactic acid accumulates and protease continues to hydrolyze the yogurt, the density of the yogurt increases, and a large amount of yogurt solids accumulate at the bottom of the inner liner 15. The inside of the micropores 154 is easily blocked, which prevents the micropores 154 from continuing to output whey into the fermentation tank 1. Therefore, after the blades 21 have finished stirring, the servo motor 112 is started to rotate in the opposite direction, driving the lifting frame 114 to lift the stirring rod 2 upward. At this time, the blades 21 will be driven to rotate counterclockwise. Then, the connecting surfaces 218 of adjacent blades 21 connect end to end, allowing multiple blades 21 and connecting blocks 22 to form a complete partition. At this time, the blades 21 are in a state of... Figure 2 In the state of the servo motor 112, the lifting frame 114 will be driven to rise to the highest point inside the connecting shell 111. When the lifting frame 114 drives the blades 21 to close and continues to move upward, the gear frame 231 will be limited by the gear 211, thereby fixing the telescopic column 23. Then, when the stirring rod 2 continues to move upward, it will drive the telescopic column 23 to move upward synchronously. At this time, the insertion column 232 remains fixed, and the second spring 233 is squeezed and compressed, thereby separating the yogurt inside the inner liner 15 into multiple layers through the partition composed of the blades 21 and the connecting block 22. In the subsequent fermentation process, the yogurt is fermented in multiple layers without interfering with each other. When whey precipitates into the fermentation tank 1 through the micropores 154, the volume of yogurt in each compartment decreases, and a certain space appears above each layer of yogurt. The whey in the micropores 154 within this space has been precipitated and will not be blocked. At this time, the servo motor 112 drives the lifting frame 114 to move slowly downward, which can move the yogurt above the blade 21 downward as a whole, thereby changing the position of the yogurt and causing the upper yogurt to move into the space below. During the movement, the upper yogurt switches to the lower micropores 154, and the whey is precipitated out to the outside through the lower micropores 154, thereby reducing the blockage of the micropores 154. After fermentation is complete, the servo motor 112 is started to drive the lifting frame 114 to move downwards and reset. When the second spring 233 and the insertion column 232 are fully reset, the telescopic column 23 is also reset. At this time, the blade 21 is rotated to a vertical position, which allows the raw material at the top of the blade 21 to slide down. At the same time, the external equipment inputs high-pressure sterile gas into the fermentation tank 1, and discharges the finished yogurt inside the inner liner 15 to the outside through the discharge port 14. Then, different liquids are injected into the fermentation tank 1 multiple times to clean the fermentation tank 1 and the inner liner 15. At the same time, the reduction motor 11 drives the stirring rod 2 and the blade 21 to rotate. When rotating, the blade 21 rotates at an angle to clean the inside of the inner liner 15 more quickly. After cleaning, one fermentation of dry yogurt is completed.

[0029] like Figures 6 to 7 As shown, multiple telescopic holes are provided at the top and bottom of the blade 21. A protrusion 212 is slidably connected inside the telescopic hole. The telescopic hole and the protrusion 212 are fitted with a clearance. A lifting component is provided inside the blade 21 to drive the protrusion 212 to extend and retract in the telescopic hole.

[0030] like Figures 7 to 8 As shown, the lifting assembly includes a pair of connecting frames 213 slidably connected inside the blade 21. The connecting frames 213 are fixedly connected to multiple protrusions 212. A telescopic rod 214 is slidably connected inside the blade 21. Multiple guide frames 216 are fixed outside the telescopic rod 214. The rod body of the connecting frame 213 is slidably connected inside the guide frame 216. A pushing structure is provided at one end of the telescopic rod 214. When the guide frame 216 moves, it drives the connecting frame 213 to rise and fall through the internal guide hole.

[0031] like Figures 7 to 8 As shown, the pushing structure includes a connecting post 215 fixed to one end of the telescopic rod 214. The connecting post 215 extends from the inside of the blade 21. Multiple sets of recesses 221 are provided on the outer side of the connecting block 22. The connecting post 215 can be inserted into the inside of the recesses 221. A first spring 217 is fixed to one end of the telescopic rod 214 away from the connecting post 215. The other end of the first spring 217 is fixedly connected to the blade 21.

[0032] During the stirring process, in order to more quickly and evenly stir the raw materials inside the inner liner 15, a protrusion 212 is provided inside the blade 21. When the blade 21 is in a horizontal state, the protrusion 212 retracts into the telescopic hole. At this time, the protrusion 212 and the blade 21 are in a horizontal position. Figure 6 In the state of rotation of blade 21, connecting post 215 is placed inside recess 221. When blade 21 rotates, connecting post 215 moves out of recess 221. At this time, connecting post 215 pushes telescopic rod 214 into blade 21. Telescopic rod 214 drives guide frame 216 to move, which in turn drives connecting frame 213 to push protrusion 212 out of telescopic hole. At this time, protrusion 212 increases the resistance between blade 21 and raw material, thereby driving the raw material to stir more. When blade 21 is in horizontal and vertical state, connecting post 215 is inside recess 221. At this time, first spring 217 can push telescopic rod 214 to automatically reset, thereby causing protrusion 212 to retract into telescopic hole, preventing protrusion 212 from extending out and affecting yogurt fermentation at the top of blade 21 and sliding down.

[0033] like Figure 10 As shown, the micropore 154 is an oblique hole, and the height of the end of the micropore 154 placed inside the inner liner 15 is higher than the height of the end of the micropore 154 placed outside the inner liner 15.

[0034] like Figures 2 to 9 As shown, an ultrasonic transducer 151 is installed on one side of the top of the inner liner 15, a slot 141 is opened inside the discharge port 14, a fixing ring 152 is fixed at the bottom of the inner liner 15, a rubber ring 153 is sleeved on the outside of the fixing ring 152, and the rubber ring 153 is placed inside the slot 141.

[0035] During fermentation, the ultrasonic transducer 151 drives the inner tank 15 to vibrate for one minute every five minutes. This vibration shakes off the thin layer of protein filter cake on the surface of the micropores 154, preventing deep clogging. The downward-sloping micropores 154 further cooperate with the ultrasonic transducer 151 to make the filter cake easier to shake off. During the vibration, the fixing ring 152 moves inside the slot 141. The rubber ring 153 can buffer the fixing ring 152. At the same time, the elasticity of the rubber ring 153 allows the fixing ring 152 to have a certain range of movement, which facilitates the vibration of the inner tank 15.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fermentation apparatus for producing dry yogurt, characterized in that: The fermentation tank (1) includes a connecting shell (111) fixed at the top of the fermentation tank (1), a geared motor (11) installed at the top of the connecting shell (111), a feed inlet (12) fixed on one side of the top of the fermentation tank (1), an inner liner (15) provided inside the fermentation tank (1), a plurality of micro holes (154) equally spaced on the outer side of the inner liner (15), a drain pipe (13) fixed on one side of the bottom of the fermentation tank (1), and a discharge port (14) provided at the bottom of the fermentation tank (1). The inner liner (15) is provided with a stirring rod (2), and multiple connecting blocks (22) are fixed to the outside of the stirring rod (2). Multiple blades (21) are rotatably connected to the outside of the connecting blocks (22). A rotating component is provided inside the connecting blocks (22) to drive the blades (21) to rotate. The maximum rotation angle of the blades (21) is 135°. An adjustment component is provided at the top of the stirring rod (2).

2. The fermentation apparatus for producing dry yogurt according to claim 1, characterized in that: The rotating assembly includes a telescopic column (23) slidably connected inside the stirring rod (2), a gear (211) fixed at the end of the rotating shaft of the blade (21), a gear frame (231) slidably connected inside the connecting block (22), one side of the gear frame (231) meshing with the gear (211), and the other end of the gear frame (231) fixedly connected to the telescopic column (23).

3. A fermentation apparatus for producing dry yogurt according to claim 2, characterized in that: The adjustment assembly includes a lifting frame (114) rotatably connected to the top of the stirring rod (2), the lifting frame (114) being slidably connected inside the connecting shell (111), a lead screw (113) being rotatably connected to one side of the connecting shell (111), the lead screw (113) being threadedly connected to the lifting frame (114), a servo motor (112) being installed on one side of the top of the connecting shell (111), the output shaft end of the servo motor (112) being fixedly connected to the lead screw (113), a slide rod being fixed on the other side of the connecting shell (111), the other end of the lifting frame (114) being slidably connected to the slide rod, and the top of the telescopic column (23) being connected to the shaft end of the reduction motor (11) through the connecting assembly.

4. A fermentation apparatus for producing dry yogurt according to claim 3, characterized in that: The connecting assembly includes a plug (232) fixed to the end of the shaft of the geared motor (11). The telescopic column (23) has a sliding cavity inside. The plug (232) is slidably connected inside the sliding cavity of the telescopic column (23). A second spring (233) is provided inside the sliding cavity. The bottom end of the second spring (233) is fixedly connected to the bottom end of the sliding cavity. The top end of the second spring (233) is fixedly connected to the bottom end of the plug (232). A guide rod (234) is fixedly fixed to the bottom end of the plug (232). The guide rod (234) is inserted inside the telescopic column (23).

5. A fermentation apparatus for producing dry yogurt according to claim 1, characterized in that: The blade (21) has a connecting surface (218) on both sides. The inclined surfaces of the connecting surfaces (218) on both sides face opposite directions, and the inclined surfaces on both sides of the connecting surface (218) can be connected.

6. A fermentation apparatus for producing dry yogurt according to claim 1, characterized in that: Multiple telescopic holes are provided at the top and bottom of the blade (21). A protrusion (212) is slidably connected inside the telescopic hole. The telescopic hole and the protrusion (212) are fitted with a clearance. A lifting component is provided inside the blade (21) to drive the protrusion (212) to extend and retract in the telescopic hole.

7. A fermentation apparatus for producing dry yogurt according to claim 6, characterized in that: The lifting assembly includes a pair of connecting frames (213) slidably connected inside the blade (21). The connecting frames (213) are fixedly connected to a plurality of protrusions (212). A telescopic rod (214) is slidably connected inside the blade (21). A plurality of guide frames (216) are fixed outside the telescopic rod (214). The rod body of the connecting frame (213) is slidably connected inside the guide frame (216). A pushing structure is provided at one end of the telescopic rod (214). When the guide frame (216) moves, it drives the connecting frame (213) to rise and fall through the internal guide hole.

8. A fermentation apparatus for producing dry yogurt according to claim 7, characterized in that: The pushing structure includes a connecting post (215) fixed to one end of the telescopic rod (214). The connecting post (215) extends from the inside of the blade (21). Multiple sets of recesses (221) are provided on the outer side of the connecting block (22). The connecting post (215) can be inserted into the inside of the recesses (221). A first spring (217) is fixed to one end of the telescopic rod (214) away from the connecting post (215). The other end of the first spring (217) is fixedly connected to the blade (21).

9. A fermentation apparatus for producing dry yogurt according to any one of claims 1-8, characterized in that: The micropore (154) is an oblique hole, and the height of the micropore (154) at the inner end of the inner liner (15) is higher than the height of the micropore (154) at the outer end of the inner liner (15).

10. A fermentation apparatus for producing dry yogurt according to claim 9, characterized in that: An ultrasonic transducer (151) is installed on one side of the top of the inner liner (15). A slot (141) is provided inside the discharge port (14). A fixing ring (152) is fixed at the bottom of the inner liner (15). A rubber ring (153) is sleeved on the outside of the fixing ring (152). The rubber ring (153) is placed inside the slot (141).

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