Production process and filling equipment of frozen egg liquid

Abstract

The invention discloses a production process and filling equipment of frozen egg liquid. The filling equipment comprises a rack, an egg liquid storage tank, a filling bag, a filling mechanism, an air exhaust mechanism and a nitrogen conveyor, the filling mechanism comprises a transverse linear driving device, a first lifting linear driving device, a second lifting linear driving device, a clamping device, a filling pipe, a sealing piston, a hollow piston rod and a clamping seat; the air exhaust mechanism comprises a negative pressure source; the nitrogen conveying mechanism comprises a nitrogen cylinder; the production process of the frozen egg liquid comprises the following steps: screening raw materials, cleaning and disinfecting, beating eggs and separating, filtering, adding auxiliary materials, homogenizing, filling, sterilizing and freezing. In the egg liquid filling process, filling bags are vacuumized, then egg liquid is filled into the filling bags, finally nitrogen is introduced, and a sealing cover is covered, so that air can be exhausted, microbial growth can be inhibited, oxidation reaction can be reduced, and the quality guarantee period of the egg liquid can be prolonged; nitrogen can play a buffering role in the filling bag, and the risk that the filling bag cracks in the freezing process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of egg liquid production, in particular to a production process and filling equipment for frozen egg liquid. Background Art

[0002] As a substitute for fresh eggs, whole egg liquid is a raw material obtained by selecting, cleaning, breaking eggs, collecting egg liquid, filtering, cooling, and pasteurizing fresh eggs. It has the advantages of easy storage, convenient and fast use, no broken eggshells entering food, and no Salmonella contamination. Currently, when whole egg liquid is stored at room temperature, it often deteriorates within a few days, while frozen whole egg liquid can be stored for up to 9 months at -18°C, which is beneficial to the production needs of food processing enterprises and central kitchens. Therefore, frozen whole egg liquid is also a trend to replace eggs in the production of central kitchens or prefabricated dishes.

[0003] Currently, during the filling process of frozen egg liquid, air usually enters the filling bag. If there is air in the egg liquid, since the egg liquid contains components such as fat and protein, the oxygen in the air will react with the unsaturated fatty acids in the egg liquid to produce substances such as aldehydes, ketones, and acids. These substances will cause the egg liquid to produce peculiar smells, such as a rancid smell. This oxidation reaction will gradually reduce the quality of the egg liquid over time and shorten its shelf life. The oxygen in the air may also oxidize certain amino acid side chains of proteins, resulting in changes in the protein structure, which in turn affects the functional properties of the egg liquid, such as emulsifying properties and foaming properties, and accelerates the deterioration process of the egg liquid. The presence of air also provides better living conditions for microorganisms. Some aerobic microorganisms can utilize the nutrients in the egg liquid to grow and reproduce in an air-containing environment. These microorganisms will decompose substances such as proteins, fats, and sugars in the egg liquid during growth, producing metabolites such as organic acids and ammonia. Organic acids will lower the pH value of the egg liquid, while alkaline substances such as ammonia will increase the pH value. These changes in pH value will affect the stability of the egg liquid, and the large-scale reproduction of microorganisms will cause the egg liquid to spoil and deteriorate, greatly shortening the shelf life.

[0004] Although the growth of microorganisms and the rate of fat oxidation reaction will be greatly reduced at frozen temperatures, the presence of air will still cause the fat oxidation reaction to continue to a certain extent. Because the activation energy of the fat oxidation reaction is relatively low, even at low temperatures, the reaction may occur slowly and will gradually affect the quality of the egg liquid over time. Summary of the Invention

[0005] Based on this, in view of the technical problem that the quality of frozen egg liquid decreases due to air entering the filling bag during the filling process of frozen egg liquid, it is necessary to provide a production process and filling equipment for frozen egg liquid that can introduce nitrogen into the filling bag to isolate the egg liquid from air.

[0006] To achieve the above object, on the one hand, the present invention provides a filling device for frozen egg liquid, comprising a frame, an egg liquid storage tank, a filling bag, a filling mechanism, an air extraction mechanism, and a nitrogen delivery mechanism; wherein, The egg liquid storage tank is provided with a discharge port; The filling bag includes a bag mouth, a sealing cover, and a bag body. The bag mouth is fixedly connected to the bag body, and the sealing cover is used to seal the bag mouth; The filling mechanism includes a filling pipe, a sealing piston, and a hollow piston rod. The bottom of the filling pipe forms a filling head that can be inserted into the bag mouth, and when the filling head is inserted into the bag mouth, the filling pipe can seal the bag mouth; the sealing piston is fixedly connected to the hollow piston rod, the sealing piston is slidably and sealingly connected to the filling pipe, and the hollow piston rod communicates with the filling pipe; the filling pipe is provided with a liquid inlet, and the liquid inlet communicates with the discharge port; The air extraction mechanism includes a negative pressure source, which is connected to the egg liquid storage tank and the hollow piston rod and is used to extract air from the filling pipe; The nitrogen delivery mechanism includes a nitrogen cylinder, which is connected to the egg liquid storage tank and the hollow piston rod and is used to deliver nitrogen to the filling pipe.

[0007] Preferably, the filling mechanism further includes a driving mechanism, a transverse linear driving device, a transverse frame, a first lifting linear driving device, a second lifting linear driving device, a lifting frame, a clamping device, a clamping seat, and a first three-way pipe. The transverse linear driving device and the clamping seat are both fixedly connected to the frame. The transverse frame is fixedly connected to the output end of the transverse linear driving device and can be linearly moved in the horizontal direction by the transverse linear driving device. The first lifting linear driving device is fixedly connected to the transverse frame. The lifting frame is fixedly connected to the output end of the first lifting linear driving device and can be linearly moved in the vertical direction by the first lifting linear driving device. The second lifting linear driving device, the clamping device, and the filling pipe are fixedly connected to the lifting frame. The upper end of the hollow piston rod communicates with the first end of the first three-way pipe, the lower end of the hollow piston rod communicates with the filling pipe, and the first three-way pipe is fixedly connected to the output end of the second lifting linear driving device and can be linearly moved in the vertical direction by the second lifting linear driving device; the filling pipe is radially provided with a liquid inlet, and the liquid inlet is connected to the discharge port through a liquid inlet pipe. A liquid inlet valve and a liquid flow sensor are installed on the liquid inlet pipe; a notch for clamping the bag mouth is formed on the clamping seat; the clamping device is used to clamp the sealing cover and cover the sealing cover onto the bag mouth; the negative pressure source communicates with the second end of the first three-way pipe, and the nitrogen cylinder communicates with the third end of the first three-way pipe.

[0008] Preferably, the vacuum mechanism also includes a first branch vacuum pipe, a first negative pressure valve, a second branch vacuum pipe, a second negative pressure valve, and a second three-way pipe. The egg liquid storage tank is provided with a vacuum port. The first end of the second three-way pipe is connected to the negative pressure end of the negative pressure source, one end of the first branch vacuum pipe is connected to the second end of the second three-way pipe, the other end of the first branch vacuum pipe is connected to the second end of the first three-way pipe, and the first branch vacuum pipe is installed with a first negative pressure valve; one end of the second branch vacuum pipe is connected to the third end of the second three-way pipe, the other end of the second branch vacuum pipe is connected to the vacuum port, and the second branch vacuum pipe is installed with a second negative pressure valve; the negative pressure source is connected to the egg liquid storage tank and the second end of the first three-way pipe.

[0009] Preferably, the nitrogen delivery mechanism includes a third three-way pipe, a first branch gas pipe, a first control valve, a second branch gas pipe, and a second control valve. A nitrogen inlet is provided on the egg liquid storage tank. The first end of the third three-way pipe is connected to the output end of the nitrogen bottle, one end of the first branch gas pipe is connected to the second end of the third three-way pipe, and the other end of the first branch gas pipe is connected to the third end of the first three-way pipe. The first control valve is installed on the first branch gas pipe; one end of the second branch gas pipe is connected to the third end of the third three-way pipe, and the other end of the second branch gas pipe is connected to the nitrogen inlet, and the second branch gas pipe is installed with a second control valve.

[0010] Preferably, the first end of the third three-way pipe is connected to the output end of the nitrogen bottle through the main gas pipe, and a gas flow meter is installed on the first branch gas pipe; and a pressure sensor and an ultrasonic level meter are installed on the top of the egg liquid storage tank.

[0011] Preferably, a sealing ring is provided at the bottom of the filling tube and at the periphery of the filling head. When the filling head is inserted into the bag opening, the sealing ring abuts against the top surface of the bag opening, thereby closing the bag opening.

[0012] Preferably, a first guide sleeve is fixed on the transverse frame, a first guide rod is fixed on the lifting frame, and the first guide rod is slidably connected to the first guide sleeve.

[0013] Preferably, it also includes a receiving mechanism, which includes a third lifting linear drive device and a loading platform. The third lifting linear drive device is fixedly connected to the frame, and the loading platform is fixedly connected to the output end of the third lifting linear drive device and can be driven by the third lifting linear drive device to move in the vertical direction and below the holder; during the period from the filling head moving away from the bag opening to the sealing cover closing the bag opening, the loading platform can lift the filling bag up under the drive of the third lifting linear drive device, so as to cooperate with the holder to press the gas in the filling bag outward, thereby limiting the entry of air into the filling bag.

[0014] Preferably, an extension plate is fixed on the frame, the third lifting linear drive device is fixedly installed on the extension plate, a second guide rod is also fixed on the extension plate, a second guide sleeve is fixed on the loading platform, and the second guide rod is slidably connected to the second guide sleeve.

[0015] Preferably, the bag opening includes a first annular groove and a second annular groove, the second annular groove is used for clamping and cooperating with the notch; the sealing cover includes a third annular groove, and the clamping device is used for clamping and cooperating with the third annular groove.

[0016] On the other hand, the present invention also provides a process for producing frozen egg liquid using the above-mentioned frozen egg liquid filling equipment, comprising the following steps: Step 1: Raw material screening: Select fresh eggs, inspect them under light, and remove eggs with dark shadows or abnormalities inside to ensure the freshness and quality of the eggs; Step 2: Clean and disinfect the eggs; Step 3: Beat the eggs and separate them: separate the egg liquid from the eggshell; Step 4: Filter: Filter the egg liquid with a 60-80 mesh filter to remove eggshell fragments, laces and other impurities in the egg liquid, making the egg liquid purer and having a better taste; Step 5, adding auxiliary materials: the auxiliary materials are antifreeze agents and / or nutritional enhancers; Step 6: Homogenization: Use a homogenizer at a pressure of 15-20 MPa to break up the fat globules and other particles in the egg liquid to form a uniform dispersion system. This can prevent the fat from floating up, improve the stability of the egg liquid, and make the egg liquid more delicate during subsequent freezing and use. Step 7, filling: using filling equipment, first evacuate the filling bag, then fill the egg liquid into the filling bag, finally introduce nitrogen, and cover with a sealing cover; Step 8: Sterilization: Use pasteurization method to sterilize in a water bath at 64℃-66℃ for 3.5-4min; Step 9. Freezing: Place the filled egg liquid into the freezing equipment and control the freezing temperature below -18°C. Rapid freezing is very important. Generally, the center temperature of the egg liquid is required to reach -18°C within 2-4 hours. This allows the water in the egg liquid to quickly form small ice crystals, reducing damage to components such as egg protein.

[0017] Compared with the prior art, this technical solution has at least one of the following beneficial effects: 1. During the egg liquid filling process, the filling bag is vacuumed and then filled with egg liquid. Finally, nitrogen is introduced and the sealing cover is closed to discharge air, inhibit the growth of microorganisms, reduce oxidation reactions, and extend the shelf life of the egg liquid. Nitrogen occupies a certain space in the filling bag and can play a buffering role, reducing the risk of cracking of the filling bag during the freezing process. 2. By driving the sealing piston to descend inside the filling pipe, the egg liquid adhering to the inner wall of the filling pipe can be scraped off, cleaning the inner wall of the filling pipe, and at the same time avoiding the situation of subsequent egg liquid dripping and causing pollution; nitrogen is filled into the bag body through the filling head. During the process of nitrogen being filled into the bag body, the egg liquid on the inner wall of the filling head will be promoted to flow downward by the airflow effect, avoiding the residual egg liquid in the filling head, and avoiding the residual egg liquid in the filling head from dripping downward when the filling pipe moves subsequently, causing pollution. Brief Description of the Drawings

[0018] Figure 1 is a three-dimensional view of Embodiment 1 and Embodiment 2 of the present invention Figure 1 (the filling bag is not shown); Figure 2 is a three-dimensional view of Embodiment 1 and Embodiment 2 of the present invention Figure 2 ; Figure 3 is a three-dimensional view of Embodiment 1 and Embodiment 2 of the present invention Figure 3 (the frame is omitted); Figure 4 is a partial sectional view of the filling bag and the filling mechanism Figure 1 (the state where the clamping device clamps the sealing cover); Figure 5 is a partial sectional view of the filling bag and the filling mechanism Figure 2 (the state where the filling pipe is directly above the notch); Figure 6 is a partial sectional view of the filling bag and the filling mechanism Figure 3 (the state where the filling head is inserted into the bag mouth); Figure 7 is a partial sectional view of the filling bag and the filling mechanism Figure 4 (the state where the sealing piston descends to the bottom of the filling head); In the figure, 1 is the frame; 2 is the egg liquid storage tank; 21 is the feed inlet; 22 is the feed valve; 23 is the discharge port; 24 is the air extraction port; 25 is the nitrogen inlet; 26 is the air pressure sensor; 27 is the ultrasonic level gauge; 3 is the filling bag; 31 is the bag mouth; 311 is the first annular groove; 312 is the second annular groove; 32 is the sealing cover; 321 is the third annular groove; 33 is the bag body; 4 is the filling mechanism; 401 is the transverse linear drive device; 402 is the transverse frame; 403 is the first lifting linear drive device; 404 is the second lifting linear drive device; 405 is the lifting frame; 406 is the clamping device; 407 is the filling pipe; 408 is the sealing piston; 409 is the hollow piston rod; 410 is the clamping seat; 411 is the first three-way pipe; 412 is the liquid inlet; 413 is the liquid inlet pipe; 414 is the liquid inlet valve; 415 is the liquid flow sensor; 416 is the notch; 417 is the filling head; 418 is the sealing ring; 419 is the first guide sleeve; 420 is the first guide rod; 5 is the air extraction mechanism; 51 is the negative pressure source; 52 is the first branch air extraction pipe; 53 is the first negative pressure valve; 54 is the second branch air extraction pipe; 55 is the second negative pressure valve; 56 is the second three-way pipe; 6 is the nitrogen delivery mechanism; 61 is the nitrogen cylinder; 62 is the third three-way pipe; 63 is the first branch gas pipeline; 64 is the first control valve; 65 is the second branch gas pipeline; 66 is the second control valve; 67 is the main gas pipeline; 68 is the gas flow meter; 7 is the receiving mechanism; 71 is the third lifting linear drive device; 72 is the loading platform; 73 is the extension plate; 74 is the second guide rod; 75 is the second guide sleeve. Detailed implementation manners

[0019] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0020] Embodiment 1

[0021] Please refer to Figures 1 to 7 , this application embodiment provides a filling device for frozen egg liquid, including a frame 1, an egg liquid storage tank 2, a filling bag 3, a filling mechanism 4, an air extraction mechanism 5, a nitrogen delivery mechanism 6, and a receiving mechanism 7.

[0022] Among them, the machine frame 1 is formed with a storage cavity with an open top. The egg liquid storage tank 2 is installed in the storage cavity formed inside the machine frame 1. An inlet 21 is provided at the upper part of the egg liquid storage tank 2, and a feed valve 22 is installed on the inlet 21. By opening the feed valve 22, the egg liquid can be conveyed into the egg liquid storage tank 2 through the inlet 21. An outlet 23 is provided at the lower part of the egg liquid storage tank 2, and the egg liquid is discharged outward through the outlet 23.

[0023] The filling bag 3 is a sterile bag, including a bag mouth 31, a sealing cover 32 and a bag body 33. The bag mouth 31 is fixedly connected to the bag body 33, and the sealing cover 32 is used to seal the bag mouth 31.

[0024] The perfusion mechanism 4 includes a transverse linear driving device 401, a transverse frame 402, a first lifting linear driving device 403, a second lifting linear driving device 404, a lifting frame 405, a clamping device 406, a filling pipe 407, a sealing piston 408, a hollow piston rod 409, a clamping seat 410, a first three-way pipe 411, a liquid inlet 412, a liquid inlet pipe 413, a liquid inlet valve 414, a liquid flow sensor 415, a notch 416, a filling head 417, a sealing ring 418, a first guide sleeve 419, and a first guide rod 420; The transverse linear driving device 401 is selected from a rodless cylinder or an electric slide table. Both the transverse linear driving device 401 and the clamping seat 410 are fixedly connected to the machine frame 1. The transverse linear driving device 401 and the clamping seat 410 are both fixed on the front end face of the machine frame 1. The transverse frame 402 is fixedly connected to the output end of the transverse linear driving device 401 and can be driven by the transverse linear driving device 401 to move linearly in the horizontal direction; The first lifting linear driving device 403 is selected from a cylinder, an electric cylinder or a hydraulic cylinder. The first lifting linear driving device 403 is fixedly connected to the transverse frame 402. The lifting frame 405 is fixedly connected to the output end of the first lifting linear driving device 403 and can be driven by the first lifting linear driving device 403 to move linearly in the vertical direction. The second lifting linear driving device 404, the clamping device 406 and the filling pipe 407 are fixedly connected to the lifting frame 405; The top of the filling pipe 407 is open. The sealing piston 408 is fixedly connected to the hollow piston rod 409. The sealing piston 408 is slidably and sealingly connected to the filling pipe 407. The upper end of the hollow piston rod 409 is communicated with the first end of the first three-way pipe 411, and the lower end of the hollow piston rod 409 is communicated with the filling pipe 407. Specifically, the sealing piston 408 and the filling pipe 407 together enclose a filling chamber, and the lower end of the hollow piston rod 409 is communicated with the filling chamber; The second lifting linear driving device 404 is selected from a cylinder, an electric cylinder or a hydraulic cylinder. The first three-way pipe 411 is fixedly connected to the output end of the second lifting linear driving device 404 and can be driven by the second lifting linear driving device 404 to move linearly in the vertical direction; The filling pipe 407 is radially provided with a liquid inlet 412. The liquid inlet 412 is connected to the discharge port 23 through a liquid inlet pipe 413. A liquid inlet valve 414 and a liquid flow sensor 415 are installed on the liquid inlet pipe 413. The liquid inlet valve 414 is selected as an electromagnetic valve or an electric valve. The liquid flow sensor 415 is installed on a vertical pipe section of the liquid inlet pipe 413 and can detect the flow rate of the egg liquid entering the filling pipe 407. When the filling volume of the egg liquid reaches a preset value, the liquid inlet valve 414 automatically closes, thereby realizing quantitative filling. The clamping seat 410 is provided with a notch 416 for clamping the bag mouth 31. The clamping device 406 is an electric gripper or a pneumatic gripper, preferably a pneumatic three-jaw gripper. The clamping device 406 is used to clamp the sealing cover 32 and cover the sealing cover 32 onto the bag mouth 31. After the bag mouth 31 with the sealing cover 32 is clamped into the notch 416, the clamping device 406 will clamp away the sealing cover 32 on the bag mouth 31, thereby exposing the bag mouth 31 for subsequent filling of the egg liquid into the bag mouth 31. A filling head 417 is formed at the bottom of the filling pipe 407. The outer diameter of the filling head 417 is smaller than the maximum outer diameter of the filling pipe 407. The filling head 417 can be inserted into the bag mouth 31. When the filling head 417 is inserted into the bag mouth 31, the filling pipe 407 seals the bag mouth 31. Specifically, a sealing ring 418 is provided at the bottom of the filling pipe 407 and around the filling head 417. When the filling head 417 is inserted into the bag mouth 31, the sealing ring 418 abuts against the top surface of the bag mouth 31, thereby sealing the bag mouth 31. The bag mouth 31 includes a first annular groove 311 and a second annular groove 312. The second annular groove 312 is used for clamping and cooperating with the notch 416. The sealing cover 32 includes a third annular groove 321. The clamping device 406 is used for clamping and cooperating with the third annular groove 321.

[0025] In the above structure, the clamping device 406 and the filling pipe 407 are driven by the transverse linear driving device 401 to move horizontally, so that the clamping device 406 and the filling pipe 407 alternately move above the notch 416. The clamping device 406 and the filling pipe 407 are driven by the first lifting linear driving device 403 to lift and lower. When the filling pipe 407 is located directly above the notch 416, filling operations can be performed. When the clamping device 406 is located directly above the notch 416, disassembly and assembly operations of the sealing cover 32 can be performed, that is, removing the sealing cover 32 located in the bag mouth 31 before filling and installing the sealing cover 32 onto the bag mouth 31 after filling is completed, so that the sealing cover 32 seals the bag mouth 31. During filling, the second lifting linear driving device 404 drives the hollow piston rod 409 and the sealing piston 408 to rise, so that the sealing piston 408 moves above the liquid inlet 412 and the sealing piston 408 does not block the liquid inlet 412. After filling is completed, the second lifting linear driving device 404 drives the hollow piston rod 409 and the sealing piston 408 to descend, so that the sealing piston 408 moves to the bottom of the filling pipe 407 and the sealing piston 408 blocks the liquid inlet 412.

[0026] The air extraction mechanism 5 includes a negative pressure source 51, a first branch air extraction pipe 52, a first negative pressure valve 53, a second branch air extraction pipe 54, a second negative pressure valve 55 and a second three-way pipe 56. The negative pressure source 51 is a vacuum pump, and the negative pressure source 51 is installed in the storage cavity inside the frame 1. Both the first negative pressure valve 53 and the second negative pressure valve 55 are solenoid valves or electric valves. An air extraction port 24 is provided on the egg liquid storage tank 2. The first end of the second three-way pipe 56 is connected to the negative pressure end of the negative pressure source 51. One end of the first branch air extraction pipe 52 is connected to the second end of the second three-way pipe 56. The other end of the first branch air extraction pipe 52 is connected to the second end of the first three-way pipe 411. The first negative pressure valve 53 is installed on the first branch air extraction pipe 52. A pipeline electronic barometer can also be installed on the first branch air extraction pipe 52 to facilitate the detection of air pressure. One end of the second branch air extraction pipe 54 is connected to the third end of the second three-way pipe 56. The other end of the second branch air extraction pipe 54 is connected to the air extraction port 24. The second negative pressure valve 55 is installed on the second branch air extraction pipe 54.

[0027] In the above structure, by controlling the opening of the first negative pressure valve 53, the negative pressure source 51 is sequentially connected to the second three-way pipe 56, the first branch air extraction pipe 52, the first three-way pipe 411, the hollow piston rod 409, and the filling pipe 407, so that when the filling head 417 is inserted into the bag mouth 31, the air in the bag body 33 is extracted. By controlling the opening of the second negative pressure valve 55, the negative pressure source 51 is sequentially connected to the second three-way pipe 56, the second branch air extraction pipe 54, the air extraction port 24, and the egg liquid storage tank 2. After the egg liquid is added to the egg liquid storage tank 2, the air in the egg liquid storage tank 2 is extracted, creating a vacuum environment in the egg liquid storage tank 2 to facilitate the preservation of the egg liquid.

[0028] The nitrogen gas delivery mechanism 6 includes a nitrogen gas cylinder 61, a third three-way pipe 62, a first branch gas delivery pipe 63, a first control valve 64, a second branch gas delivery pipe 65, and a second control valve 66. The nitrogen gas cylinder 61 is installed where both the first control valve 64 and the second control valve 66 are solenoid valves or electric valves. A nitrogen gas inlet 25 is provided on the egg liquid storage tank 2. The first end of the third three-way pipe 62 is connected to the output end of the nitrogen gas cylinder 61 through the main gas delivery pipe 67. One end of the first branch gas delivery pipe 63 is connected to the second end of the third three-way pipe 62. The other end of the first branch gas delivery pipe 63 is connected to the third end of the first three-way pipe 411. The first control valve 64 and a gas flow meter 68 are installed on the first branch gas delivery pipe 63. The gas flow meter 68 detects the nitrogen gas flow in the first branch gas delivery pipe 63, and the on-off of the first branch gas delivery pipe 63 is controlled through the first control valve 64 to facilitate the control of the amount of nitrogen gas filled into the bag body 33. One end of the second branch gas delivery pipe 65 is connected to the third end of the third three-way pipe 62. The other end of the second branch gas delivery pipe 65 is connected to the nitrogen gas inlet 25. The second control valve 66 is installed on the second branch gas delivery pipe 65.

[0029] In the above structure, by controlling the opening of the first control valve 64, the nitrogen cylinder 61 is successively connected to the main gas transmission pipe 67, the third three-way pipe 62, the first branch gas transmission pipe 63, the first three-way pipe 411, the hollow piston rod 409, and the filling pipe 407. Thus, when the egg liquid filling is completed at the filling head 417, nitrogen is filled into the bag body 33. While the nitrogen is flowing, it promotes the downward flow of the egg liquid on the inner wall of the filling head 417, avoiding the residual egg liquid from dripping downward when the filling pipe 407 moves later, causing pollution. By controlling the opening of the second control valve 66, the nitrogen cylinder 61 is successively connected to the main gas transmission pipe 67, the third three-way pipe 62, the second branch gas transmission pipe 65, the nitrogen inlet 25, and the egg liquid storage tank 2. After the egg liquid is added to the egg liquid storage tank 2 and the air extraction of the egg liquid storage tank 2 is completed, nitrogen is introduced into the egg liquid storage tank 2. While protecting the egg liquid, the egg liquid can be discharged from the discharge port 23 by the pressure of the nitrogen. A power pump can also be installed on the liquid inlet pipe 413 to avoid affecting the transportation of the egg liquid in case of insufficient nitrogen pressure.

[0030] To facilitate the detection of the air pressure and liquid level in the egg liquid storage tank 2, a pressure sensor 26 and an ultrasonic liquid level gauge 27 are installed on the top of the egg liquid storage tank 2. The pressure sensor 26 detects the air pressure in the egg liquid storage tank 2, and the ultrasonic liquid level gauge 27 detects the liquid level in the egg liquid storage tank 2.

[0031] To enable the lifting frame 405 to lift and lower smoothly, a first guide sleeve 419 is fixed on the transverse movement frame 402, and a first guide rod 420 is fixed on the lifting frame 405. The first guide rod 420 is slidably connected to the first guide sleeve 419. The first guide rod 420 and the first guide sleeve 419 play a guiding role, enabling the first linear lifting drive device 403 to drive the lifting frame 405 to lift and lower smoothly.

[0032] To facilitate the installation of the third linear lifting drive device 71, an extension plate 73 is fixed on the machine frame 1, and the third linear lifting drive device 71 is fixedly installed on the extension plate 73. Legs are fixed at the bottom of the extension plate 73.

[0033] A controller is also provided. The above-mentioned electrical components are all electrically connected to the controller. A control system is provided in the controller, which can control the operation of each electrical component to realize the automatic filling of the egg liquid. The control principle can refer to the working steps and will not be elaborated here.

[0034] The working principle of this embodiment: S1. Take the filling bag 3 and snap the bag mouth 31 into the notch 416; as Figure 2 shown; S2. When the clamping device 406 is directly above the notch 416, the first linear lifting drive device 403 drives the clamping device 406 and the filling pipe 407 to descend, so that the clamping device 406 descends to the notch 416, as Figure 4As shown, the clamping part of the clamping device 406 clamps the third annular groove 321, thereby removing the sealing cover 32 located within the bag mouth 31; S3. As Figure 5 shown, the first lifting linear driving device 403 drives the clamping device 406 and the filling pipe 407 to rise, and the transverse movement linear driving device 401 drives the clamping device 406 and the filling pipe 407 to move leftward in the horizontal direction, so that the filling pipe 407 moves directly above the notch 416; As Figure 6 shown, the first lifting linear driving device 403 drives the clamping device 406 and the filling pipe 407 to descend, so that the filling pipe 407 descends to the notch 416, and the filling head 417 is inserted into the bag mouth 31, and the sealing ring 418 is in sealing contact with the bag mouth 31; S4. As Figure 5 shown, in a state where the sealing piston 408 is located above the liquid inlet 412 and does not block the liquid inlet 412, while keeping the liquid inlet valve 414 closed, by controlling the opening of the first negative pressure valve 53 and the negative pressure source 51, the negative pressure source 51 evacuates the air in the bag body 33 through the second three-way pipe 56, the first branch air extraction pipe 52, the first three-way pipe 411, the hollow piston rod 409, and the filling pipe 407; S5. By controlling the opening of the second control valve 66 and the feed valve 22, the nitrogen cylinder 61 supplies nitrogen to the main gas transmission pipe 67, the third three-way pipe 62, the second branch gas transmission pipe 65, the nitrogen inlet 25, and the egg liquid storage tank 2 in sequence, so that the pressure in the egg liquid storage tank 2 increases, and the egg liquid is discharged from the discharge port 23 by the pressure of nitrogen. The egg liquid enters the filling pipe 407 from the discharge port 23 and the liquid inlet pipe 413, and enters the bag body 33 from the filling head 417. The liquid flow sensor 415 detects the egg liquid flow rate. When the filling amount of the egg liquid reaches the preset value, the liquid inlet valve 414 automatically closes, thereby realizing quantitative filling; S6. As Figure 7 shown, the second lifting linear driving device 404 drives the hollow piston rod 409 and the sealing piston 408 to descend until the sealing piston 408 moves to the bottom of the filling pipe 407; During the descent of the sealing piston 408, it contacts the inner wall of the filling pipe 407, and can scrape off the egg liquid adhering to the inner wall of the filling pipe 407, cleaning the inner wall of the filling pipe 407, and at the same time avoiding the situation of subsequent egg liquid dripping and causing pollution; When the sealing piston 408 moves to the bottom of the filling pipe 407, the upper part of the sealing piston 408 blocks the liquid inlet 412, preventing the remaining egg liquid in the liquid inlet 412 from entering the filling pipe 407; S7. By controlling the opening of the first control valve 64, nitrogen in the nitrogen cylinder 61 is passed into the main gas pipeline 67, the third three-way pipe 62, the first branch gas pipeline 63, the first three-way pipe 411, the hollow piston rod 409, and the filling pipe 407 in sequence. The nitrogen is filled into the bag body 33 through the filling head 417. During the process of filling nitrogen into the bag body 33, the egg liquid on the inner wall of the filling head 417 will flow downward under the action of air flow, avoiding the residue of egg liquid in the filling head 417. When the filling pipe 407 moves subsequently, the egg liquid remaining in the filling head 417 will not drip downward, thus preventing pollution. The gas flowmeter 68 detects the nitrogen flow rate through the first branch gas pipeline 63. When the amount of nitrogen filled into the bag body 33 reaches the preset value, the first control valve 64 is closed, thereby controlling the amount of nitrogen filled into the bag body 33 and avoiding the situation of too much or too little nitrogen in the bag body 33. S8. The first lifting linear drive device 403 drives the clamping device 406 and the filling pipe 407 to rise. The transverse movement linear drive device 401 drives the clamping device 406 and the filling pipe 407 to move horizontally to the right, so that the clamping device 406 moves directly above the notch 416. The first lifting linear drive device 403 drives the clamping device 406 and the filling pipe 407 to descend, so that the clamping device 406 descends to the notch 416. The lower part of the sealing cover 32 clamped by the clamping device 406 is inserted into the bag mouth 31, so that the sealing cover 32 seals the bag mouth 31. S9. Subsequently, the clamping device 406 releases the sealing cover 32, and the first lifting linear drive device 403 drives the clamping device 406 and the filling pipe 407 to rise. S10. Remove the filled filling bag 3, and then clamp the next filling bag 3 to be filled into the notch 416.

[0035] Embodiment 2

[0036] Please refer to Figures 1 to 3, on the basis of Embodiment 1, to prevent air from entering the bag body 33 during the process of the sealing cover 32 covering the bag mouth 31, the present embodiment further provides a receiving mechanism 7. The receiving mechanism 7 includes a third lifting linear driving device 71 and a loading platform 72. The third lifting linear driving device 71 is fixedly connected to the frame 1, and the loading platform 72 is fixedly connected to the output end of the third lifting linear driving device 71 and can be driven by the third lifting linear driving device 71 to move below the clamping seat 410 in the vertical direction. The third lifting linear driving device 71 is selected as an electric cylinder, which can drive the loading platform 72 to slowly lift; the third lifting linear driving device 71 is selected as an electric cylinder, or a servo cylinder can also be selected, which can accurately drive the loading platform 72 to lift to a preset height; during the period from the filling head 417 moving away from the bag mouth 31 to the sealing cover 32 covering the bag mouth 31, the loading platform 72 can be driven by the third lifting linear driving device 71 to lift the filling bag 3, so as to cooperate with the clamping seat 410 to press the gas in the filling bag 3 outwards, thereby restricting air from entering the filling bag 3. During the filling process of the filling bag 3, the loading platform 72 can contact the bottom of the filling bag 3 and bear part of the gravity of the filling bag 3.

[0037] To make the loading platform 72 lift smoothly, a second guide rod 74 is further fixed on the extension plate 73, and a second guide sleeve 75 is fixed on the loading platform 72. The second guide rod 74 is slidably connected to the second guide sleeve 75. The second guide rod 74 and the second guide sleeve 75 play a guiding role, which can make the third lifting linear driving device 71 drive the loading platform 72 to lift smoothly.

[0038] The receiving mechanism 7 of the present embodiment works during the S8 step of Embodiment 1. Specifically, when the first lifting linear driving device 403 drives the clamping device 406 and the filling pipe 407 to rise, the filling head 417 will move away from the bag mouth 31. At this time, the third lifting linear driving device 71 drives the loading platform 72 to rise, so that the loading platform 72 slowly lifts the filling bag 3. The upper end of the filling bag 3 contacts the bottom end of the clamping seat 410, and the loading platform 72 and the clamping seat 410 cooperate to squeeze the filling bag 3, so that the nitrogen gas in the filling bag 3 is slowly pressed out, thereby restricting air from entering the filling bag 3; when the clamping device 406 holds the sealing cover 32 and inserts it into the bag mouth 31, the third lifting linear driving device 71 stops working, so that in the nitrogen atmosphere, the sealing cover 32 can smoothly seal the bag mouth 31; subsequently, the third lifting linear driving device 71 drives the loading platform 72 to descend and reset, facilitating the removal of the filling bag 3.

[0039] Embodiment 3

[0040] The production process of frozen egg liquid includes the following steps: Step 1. Raw material screening: Select fresh eggs, conduct a light inspection on the eggs, and remove the eggs with internal shadows or abnormalities to ensure the freshness and quality of the eggs; Step 2. Clean and disinfect the eggs; Step 3: Separating the egg liquid from the eggshell: Separate the egg liquid from the eggshell. Step 4: Filtering: Filter the egg liquid through a 60 - 80 mesh sieve to remove impurities such as eggshell fragments and chalazae in the egg liquid, making the egg liquid purer and with a better taste. Step 5: Adding auxiliary materials: In this embodiment, the auxiliary material is an antifreeze. In other embodiments, the auxiliary material is a nutritional fortifier, or both an antifreeze and a nutritional fortifier. In this embodiment, the antifreeze is sugar, and the addition amount of sugar is 5% - 10% of the mass of the egg liquid. In other embodiments, the antifreeze can also be salt or glycerol. The addition amount of salt is 1% - 2% of the mass of the egg liquid, and the addition amount of glycerol is 3% - 8% of the mass of the egg liquid. Adding an antifreeze can lower the freezing point of the egg liquid and prevent the ice crystals from being too large when the egg liquid is frozen. In some embodiments, the nutritional fortifier is vitamin A or vitamin D, and the addition amount of the nutritional fortifier is 0.3% - 0.5% of the mass of the egg liquid. Adding a nutritional fortifier can improve the nutritional value of the egg liquid. After adding sugar to the egg liquid, sugar molecules will form hydrogen bonds with water molecules, thereby restricting the movement of water molecules. During the freezing process, this hydrogen bond effect can prevent water molecules from quickly aggregating to form ice crystals, making it difficult for ice crystals to form or making the formed ice crystals smaller. Sugar can increase the glass transition temperature of the egg liquid. Glass transition refers to the process in which a substance changes from a liquid or rubbery state to a glassy state. In the glassy state, the molecular movement of the substance almost stops, similar to a solid. The presence of sugar makes the egg liquid more likely to enter the glassy state and reduces the formation of ice crystals. This helps to maintain the stability of the egg liquid during the freezing process and avoid problems such as protein denaturation and fat oxidation caused by the growth of ice crystals. After thawing, the color, flavor, and nutritional components of the egg liquid can also be better maintained under the protection of sugar. Salt is mainly sodium chloride, which is an electrolyte. When it dissolves in the egg liquid, it will dissociate to produce sodium ions and chloride ions. These ions will interfere with the process of water molecules forming ice crystals. According to Raoult's law, in a solution, the presence of salt will lower the vapor pressure of water, thereby lowering the freezing point of the solution. For the egg liquid, adding an appropriate amount of salt can make the freezing point of the egg liquid lower than 0°C. During the freezing process, the presence of salt changes the process of ice crystal formation in the egg liquid. Due to the presence of salt ions, the formation of ice crystals is hindered, and the growth direction and speed of ice crystals are changed, tending to form smaller ice crystals. Smaller ice crystals cause relatively less damage to the tissue structure of the egg liquid, and the egg liquid can better maintain its original state after thawing, such as the structure of proteins and the texture of the egg liquid. Glycerol has good characteristics of lowering the freezing point. After adding glycerol to the egg liquid, it will lower the freezing point of the egg liquid and increase the viscosity of the egg liquid. Glycerol has certain antioxidant properties and can extend the shelf life of the egg liquid. Step 6, Homogenization: Use a homogenizer to break the fat globules and other microparticles in the egg liquid under a pressure of 15 - 20 MPa to form a uniform dispersion system, which can prevent the fat from floating, improve the stability of the egg liquid, and make the texture of the egg liquid more delicate during subsequent freezing and use; Step 7, Filling: Use the filling equipment provided in Embodiment 1 or Embodiment 1. First, evacuate the filling bag 3, then fill the egg liquid into the filling bag 3, and finally introduce nitrogen gas and cover the sealing cap 32; for the specific steps, refer to Embodiment 1 and Embodiment 2; the volume of the introduced nitrogen gas should generally be less than the volume of the egg liquid, and it can be specifically set according to requirements; Among them, evacuating the air and introducing nitrogen gas into the filling bag 3 can discharge the air, inhibit the growth of microorganisms, reduce oxidation reactions, and extend the shelf life of the egg liquid; the nitrogen gas occupies a certain space in the filling bag 3 and can play a buffering role. When being vibrated or collided during handling, the shaking of the egg liquid in the bag will be inhibited by the nitrogen gas; During the freezing process, the size and distribution of ice crystals have a great impact on the quality of the egg liquid. When the egg liquid is frozen, the presence of air may affect the ice crystal formation process; the introduction of nitrogen gas can make the environment where the egg liquid is located more stable, which is conducive to the formation of small and uniform ice crystals; During the freezing process, the volume of the egg liquid will expand, and the presence of nitrogen gas can buffer the pressure brought by the expansion of the egg liquid volume to a certain extent.

[0041] Step 8, Sterilization: Use pasteurization for sterilization, and sterilize for 3.5 - 4 minutes in a water bath at 64°C - 66°C; Step 9, Freezing: Put the filled egg liquid into a freezing device, and control the freezing temperature below -18°C; rapid freezing is very important. Generally, it is required to make the central temperature of the egg liquid reach -18°C within 2 - 4 hours, so that the water in the egg liquid can quickly form small ice crystals and reduce the damage to components such as proteins in the egg liquid.

[0042] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of this invention patent shall be subject to the appended claims.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0044] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0045] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A filling device for frozen egg liquid, characterized in that: It comprises a frame (1), an egg liquid storage tank (2), a filling bag (3), a filling mechanism (4), an air extraction mechanism (5), and a nitrogen delivery mechanism (6); wherein: The egg liquid storage tank (2) is provided with a discharge port (23); The filling bag (3) comprises a bag opening (31), a sealing cover (32) and a bag body (33); the bag opening (31) is fixedly connected to the bag body (33), and the sealing cover (32) is used to seal the bag opening (31); The filling mechanism (4) comprises a filling tube (407), a sealing piston (408), and a hollow piston rod (409); a filling head (417) capable of being inserted into the bag opening (31) is formed at the bottom of the filling tube (407); when the filling head (417) is inserted into the bag opening (31), the filling tube (407) can close the bag opening (31); the sealing piston (408) is fixedly connected to the hollow piston rod (409); the sealing piston (408) is slidably and sealingly connected to the filling tube (407); the hollow piston rod (409) is in communication with the filling tube (407); a liquid inlet (412) is provided on the filling tube (407); the liquid inlet (412) is in communication with the discharge port (23); The air extraction mechanism (5) comprises a negative pressure source (51), which is connected to the egg liquid storage tank (2) and the hollow piston rod (409) and is used to extract air into the filling tube (407); The nitrogen delivery mechanism (6) comprises a nitrogen bottle (61), which is connected to the egg liquid storage tank (2) and the hollow piston rod (409) and is used to deliver nitrogen to the filling tube (407).

2. The filling equipment for frozen egg liquid according to claim 1, characterized in that: The filling mechanism (4) further comprises a driving mechanism transverse linear driving device (401), a transverse frame (402), a first lifting linear driving device (403), a second lifting linear driving device (404), a lifting frame (405), a clamping device (406), a holder (410), and a first three-way pipe (411); the transverse linear driving device (401) and the holder (410) are both fixedly connected to the frame (1); the transverse frame (402) is fixedly connected to the output end of the transverse linear driving device (401) and can be driven by the transverse linear driving device (401) to move linearly in a horizontal direction; the first lifting linear driving device (403) is fixedly connected to the transverse frame (402); the lifting frame (405) is fixedly connected to the output end of the first lifting linear driving device (403) and can be driven by the first lifting linear driving device (403) to move linearly in a vertical direction; the second lifting linear driving device (404), the clamping device (406), the filling tube (407) and the lifting frame ( The filling tube (407) is fixedly connected to the filling tube (407), the upper end of the hollow piston rod (409) is connected to the first end of the first three-way pipe (411), the lower end of the hollow piston rod (409) is connected to the filling tube (407), the first three-way pipe (411) is fixedly connected to the output end of the second lifting linear drive device (404) and can be driven by the second lifting linear drive device (404) to move linearly in the vertical direction; the filling tube (407) is radially provided with a liquid inlet (412), and the liquid inlet (412) is connected to the filling tube (407) through the liquid inlet pipe (413 ) is connected to the discharge port (23); a liquid inlet valve (414) and a liquid flow sensor (415) are installed on the liquid inlet pipe (413); a notch (416) for clamping the bag opening (31) is provided on the clamping seat (410); the clamping device (406) is used to clamp the sealing cover (32) and cover the sealing cover (32) to the bag opening (31); the negative pressure source (51) is connected to the second end of the first three-way pipe (411), and the nitrogen bottle (61) is connected to the third end of the first three-way pipe (411).

3. The filling equipment for frozen egg liquid according to claim 2, characterized in that: The air extraction mechanism (5) further comprises a first branch air extraction pipe (52), a first negative pressure valve (53), a second branch air extraction pipe (54), a second negative pressure valve (55), and a second three-way pipe (56); an air extraction port (24) is provided on the egg liquid storage tank (2); a first end of the second three-way pipe (56) is connected to the negative pressure end of the negative pressure source (51); one end of the first branch air extraction pipe (52) is connected to the second end of the second three-way pipe (56); and the other end of the first branch air extraction pipe (52) is connected to the negative pressure end of the negative pressure source (51). The first branch air extraction pipe (52) is connected to the second end of the first three-way pipe (411), and a first negative pressure valve (53) is installed on the first branch air extraction pipe (52); one end of the second branch air extraction pipe (54) is connected to the third end of the second three-way pipe (56), the other end of the second branch air extraction pipe (54) is connected to the air extraction port (24), and a second negative pressure valve (55) is installed on the second branch air extraction pipe (54); the negative pressure source (51) is in communication with the egg liquid storage tank (2) and the second end of the first three-way pipe (411).

4. The filling equipment for frozen egg liquid according to claim 3, characterized in that: The nitrogen delivery mechanism (6) comprises a third three-way pipe (62), a first branch gas delivery pipe (63), a first control valve (64), a second branch gas delivery pipe (65), and a second control valve (66). A nitrogen inlet (25) is provided on the egg liquid storage tank (2). A first end of the third three-way pipe (62) is connected to an output end of a nitrogen bottle (61). One end of the first branch gas delivery pipe (63) is connected to a second end of the third three-way pipe (62). The other end of the first branch gas delivery pipe (63) is connected to a third end of the first three-way pipe (411). The first control valve (64) is installed on the first branch gas delivery pipe (63). One end of the second branch gas delivery pipe (65) is connected to the third end of the third three-way pipe (62). The other end of the second branch gas delivery pipe (65) is connected to the nitrogen inlet (25). The second control valve (66) is installed on the second branch gas delivery pipe (65).

5. The filling equipment for frozen egg liquid according to claim 4, characterized in that: The first end of the third three-way pipe (62) is connected to the output end of the nitrogen bottle (61) through the main gas supply pipe (67), and a gas flow meter (68) is installed on the first branch gas supply pipe (63); and a pressure sensor (26) and an ultrasonic liquid level meter (27) are installed on the top of the egg liquid storage tank (2).

6. The filling equipment for frozen egg liquid according to claim 1, characterized in that: A sealing ring (418) is provided at the bottom of the filling tube (407) and at the periphery of the filling head (417); when the filling head (417) is inserted into the bag opening (31), the sealing ring (418) abuts against the top end surface of the bag opening (31), thereby closing the bag opening (31).

7. The filling equipment for frozen egg liquid according to claim 1, characterized in that: The bag further comprises a receiving mechanism (7), wherein the receiving mechanism (7) comprises a third lifting linear drive device (71) and a loading platform (72), wherein the third lifting linear drive device (71) is fixedly connected to the frame (1), and the loading platform (72) is fixedly connected to the output end of the third lifting linear drive device (71) and can be driven by the third lifting linear drive device (71) to move in a vertical direction below the clamping seat (410); during the period from when the filling head (417) is away from the bag opening (31) to when the sealing cover (32) covers the bag opening (31), the loading platform (72) can lift the filling bag (3) upward under the drive of the third lifting linear drive device (71), so as to cooperate with the clamping seat (410) to press the gas in the filling bag (3) outward, thereby limiting the entry of air into the filling bag (3).

8. The filling equipment for frozen egg liquid according to claim 7, characterized in that: An extension plate (73) is fixed on the frame (1), the third lifting linear drive device (71) is fixedly mounted on the extension plate (73), a second guide rod (74) is also fixed on the extension plate (73), a second guide sleeve (75) is fixed on the loading platform (72), and the second guide rod (74) is slidably connected to the second guide sleeve (75).

9. The filling equipment for frozen egg liquid according to claim 1, characterized in that: The bag opening (31) comprises a first annular groove (311) and a second annular groove (312), the second annular groove (312) being used for clamping and cooperating with the notch (416); the sealing cover (32) comprises a third annular groove (321), and the clamping device (406) is used for clamping and cooperating with the third annular groove (321).

10. A process for producing frozen egg liquid using the frozen egg liquid filling equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Raw material selection: Select fresh eggs; Step 2: Clean and disinfect the eggs; Step 3: Beat the eggs and separate them: separate the egg liquid from the eggshell; Step 4: Filtration: Filter the egg liquid to remove eggshell fragments, ligaments and other impurities in the egg liquid; Step 5: Add auxiliary materials; Step 6: Homogenize; Step 7, filling: using a filling device, first evacuate the filling bag (3), then fill the egg liquid into the filling bag (3), finally introduce nitrogen, and cover with a sealing cover (32); Step 8: Sterilization; Step 9: Freezing: Place the bag (3) filled with egg liquid into a freezing device, and control the freezing temperature to below -18°C.

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