Cold sterilization device for milk powder and sterilization method thereof

Abstract

The invention discloses a milk powder cold sterilization device and a sterilization method thereof.The milk powder cold sterilization device comprises a sterilization box, a supporting frame, ultraviolet sterilization lamps and a powder blowing assembly, the sterilization box is rotatably connected to the supporting frame, the multiple ultraviolet sterilization lamps are arranged on the inner side wall of the sterilization box at intervals, and the powder blowing assembly is arranged at the bottom of the sterilization box. The invention belongs to the technical field of sterilization devices, and aims to solve the problem of serious nutrition loss of milk powder caused by the existing thermal sterilization technology. The milk powder sterilization device has the technical effects that when milk powder needing to be sterilized is stored in the sterilization box, the ultraviolet sterilization lamp is turned on, then the powder blowing assembly is used for blowing up the milk powder to enable the milk powder in the sterilization box to fly, the situation that the milk powder in a milk powder pile cannot be effectively sterilized is avoided, more comprehensive sterilization on the milk powder is achieved, the sterilization effect is better, and nutrition is better reserved.

Description

Technical Field

[0001] The present invention relates to the technical field of sterilization devices, and in particular to a milk powder cold sterilization device and a sterilization method thereof. Background Art

[0002] Milk powder is a powdered solid dairy product made from fresh milk, goat milk, etc., through spray drying and other processing techniques. Milk powder contains important nutrients needed by the human body, including protein, fat, carbohydrates, vitamins, minerals and functional ingredients. Compared with milk, milk powder has a long shelf life, mild storage conditions, and is easy to carry. It is easy to mix when consumed and can be quickly dissolved even with warm water. This provides an important healthy dietary choice and plays a vital role in protecting people's health. The main milk powder sterilization methods on the market include high temperature sterilization, pasteurization, microwave sterilization, spray drying indirect sterilization, etc. However, these sterilization methods often involve heat sterilization processes, which lead to the quality of milk powder being affected by high processing temperatures, which is mainly reflected in the loss of nutrients, the decline of sensory quality, and the destruction of heat-sensitive bioactive substances. For example, it causes changes in the protein structure in milk powder and induces the formation of Maillard reaction intermediates. If milk powder adopts cold sterilization technology, it can not only reduce the loss of nutrients in milk powder, but also promote energy conservation and emission reduction in the dairy industry. At present, traditional mercury lamp-type ultraviolet sterilization is often used in related cold technologies, but it cannot penetrate the interior of the milk powder pile and can only sterilize the surface, so the sterilization effect is not good. Summary of the invention

[0003] Based on this, the present invention provides a milk powder cold sterilization device, which solves the problems of destruction of nutritional components of milk powder caused by heat sterilization technology and difficulty in automatic cleaning of milk powder.

[0004] In order to achieve the above-mentioned purpose, one of the objects of the present invention is to provide a milk powder cold sterilization device, comprising: a sterilization box, a support frame, an ultraviolet sterilization lamp and a powder blowing assembly, the sterilization box being rotatably connected to the support frame, a plurality of the ultraviolet sterilization lamps being arranged at intervals on the inner side wall of the sterilization box, and the powder blowing assembly being arranged at the bottom of the sterilization box.

[0005] Furthermore, it also includes a discharging assembly, which is detachably connected to the sterilization box and is used for discharging sterilized milk powder.

[0006] Furthermore, the discharging assembly includes a discharging barrel and a discharging funnel, the discharging barrel and the discharging funnel are both detachably connected to the sterilization box, and the discharging funnel is located in the discharging barrel.

[0007] Furthermore, the powder blowing assembly includes an air inlet pipe, an annular air pipe and an air inlet nozzle. The air inlet pipe is connected to the side of the annular air pipe, and multiple air inlet nozzles are evenly spaced on the annular air pipe. The multiple air inlet nozzles can be detachably connected to the bottom of the sterilization box and connected to the inside of the sterilization box. The end of the air inlet pipe facing away from the annular air pipe is connected to an air pump.

[0008] Furthermore, it also includes a driving device, the side wall of the support frame is connected to the driving device, and the driving device is used to drive the sterilization box to rotate.

[0009] Furthermore, the driving device includes a servo motor, a first gear and a second gear, the first gear is connected to the output shaft of the servo motor, the second gear is meshed with the first gear, the second gear is rotatably connected to the support frame through a rotating shaft, and the end of the rotating shaft away from the second gear passes through the support frame and is fixedly connected to the sterilization box.

[0010] Furthermore, it also includes a powder scraping device, which includes a scraping ring and a telescopic cylinder. The scraping ring is arranged in the sterilization box, the bottom of the telescopic box is connected to the telescopic cylinder, and the telescopic rod of the telescopic cylinder is connected to the scraping ring.

[0011] Furthermore, it also includes a cleaning component, which includes an annular water inlet pipe, a water distribution pipe and a water inlet pipe. A plurality of the water distribution pipes are arranged at intervals on the annular water inlet pipe, and the plurality of water distribution pipes are connected to the bottom wall of the sterilization box and connected to the sterilization box. The side of the annular water inlet pipe is connected to the water inlet pipe, and the end of the water inlet pipe away from the annular water inlet pipe is connected to a water pump. The material of the cleaning component is polytetrafluoroethylene.

[0012] Furthermore, it also includes an inner light-transmitting barrel, which is arranged in the sterilization box, and the plurality of ultraviolet sterilization lamps are located between the inner light-transmitting barrel and the sterilization box, and the material of the inner light-transmitting barrel is high-purity quartz glass.

[0013] Furthermore, it also includes a suction machine, a suction pipe of the suction machine is connected to the milk powder pile, and a feeding pipe of the suction machine is connected to the sterilization box.

[0014] Based on the same inventive concept, the present invention also provides a sterilization method using the cold sterilization device, comprising the following steps: S1: Use a suction machine to transport the milk powder to be sterilized into the sterilization box; S2: After the milk powder to be sterilized is spread on a layer at the bottom of the sterilization box, the air pump is turned on to allow the gas to enter the sterilization box through the air inlet pipe, the annular air pipe and the air inlet nozzle in sequence, so that the milk powder in the sterilization box forms turbulence, and the ultraviolet sterilization lamp is turned on to sterilize the raised milk powder. The sterilization time is 2-5 minutes, and the gas is nitrogen; S3: Open the telescopic cylinder to drive the scraper ring to move up and down in the sterilizer to scrape off the milk powder adhered to the inner wall; S4: After the sterilization is completed, the driving device is turned over to turn the sterilization box, and the first valve and the second valve are opened to pour out the sterilized milk powder, thereby completing the sterilization of the milk powder.

[0015] The above one or more technical solutions of the present invention have the following technical effects: The milk powder cold sterilization device provided by the present invention, when the sterilization box stores milk powder that needs to be sterilized, turns on the ultraviolet sterilization lamp and then uses the powder blowing component to blow up the milk powder so that the milk powder in the sterilization box flies up, thereby preventing the milk powder inside the milk powder pile from being effectively sterilized, achieving a more comprehensive sterilization of the milk powder and a better sterilization effect. At the same time, after the sterilization is completed, the milk powder hanging on the wall inside the sterilization box can be scraped off by the hanging ring to avoid the loss of milk powder. At the same time, a cleaning device is installed to facilitate the cleaning of the inside of the sterilization box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0018] Figure 1 , a three-dimensional diagram of a milk powder cold sterilization device; Figure 2 , a cross-sectional view of a milk powder cold sterilization device without a suction machine; Figure 3 , a three-dimensional diagram of a milk powder cold sterilization device without a support frame; Figure 4 , milk powder cold sterilization device Figure 3 A partial enlarged view of Figure 5 , one of the partial structural diagrams of the milk powder cold sterilization device; Figure 6 2. Partial structural diagram of milk powder cold sterilization device; Figure 7 , a structural diagram of a driving device of a milk powder cold sterilization device; Figure 8 , a structural diagram of the connection between the powder scraping device of the milk powder cold sterilization device and the base; Fig. 9 , a first view of a structural diagram of a powder blowing assembly of a milk powder cold sterilization device; Fig.10 , a second view of the structural diagram of the powder blowing assembly of the milk powder cold sterilization device; Fig.11 , a structural diagram of a powder blowing assembly of a milk powder cold sterilization device without an air inlet plate; Fig.12 , structural diagram of the sterilization box of the milk powder cold sterilization device; Fig.13 , sterilization chart of spiked microorganisms in milk powder; Fig.14 , pH change diagram of milk powder sterilization treatment.

[0019] In the figure: 1. Support frame, 2. Sterilization box, 21. Inner light-transmitting barrel, 22. Ultraviolet sterilization lamp, 24. Air inlet, 25. Jack, 26. Water inlet, 3. Discharge assembly, 31. Discharge barrel, 32. Discharge funnel, 33. First valve, 34. Second valve, 35. Inner tilting table, 4. Suction machine, 41. Suction machine body, 42. Suction pipe, 43. Feed pipe, 5. Driving device, 51. Motor Bracket, 52, servo motor, 53, first gear, 54, second gear, 55, rotating shaft, 56, block, 6, powder scraping device, 61, telescopic cylinder, 62, scraping ring, 7, cleaning assembly, 71, annular water inlet pipe, 72, one-way valve, 73, water distribution pipe, 74, water inlet pipe, 8, powder blowing assembly, 81, air inlet plate, 82, annular air pipe, 83, air inlet nozzle, 84, air inlet pipe, 9, base. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] Throughout the specification, unless otherwise specifically stated, the terms used herein should be understood as meanings commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. In the event of a conflict, the present specification takes precedence.

[0022] like Figures 1 to 11 As shown, a milk powder cold sterilization device in an embodiment of the first aspect of the present invention comprises a sterilization box 2, a support frame 1, an ultraviolet sterilization lamp 22 and a powder blowing assembly 8, the sterilization box 2 is rotatably connected to the support frame 1, a plurality of ultraviolet sterilization lamps 22 are arranged at intervals on the inner wall of the sterilization box 2, and a powder blowing assembly 8 is arranged at the bottom of the sterilization box 2.

[0023] In the above embodiment, it should be noted that the plurality of ultraviolet sterilization lamps 22 are connected to the inner wall of the sterilization box 2 by screw connection or clamping; the ultraviolet sterilization lamps 22 are microwave electrodeless ultraviolet sterilization lamps.

[0024] The technical effect achieved by the above embodiment is: when milk powder that needs to be sterilized is stored in the sterilization box 2, the ultraviolet sterilization lamp 22 is turned on and then the powder blowing component 8 is used to blow up the milk powder so that the milk powder in the sterilization box 2 flies, thereby preventing the milk powder inside the milk powder pile from being effectively sterilized, thereby achieving a more comprehensive sterilization of the milk powder and a better sterilization effect.

[0025] Optional, such as Figures 1 to 3 As shown, in some embodiments, a discharging assembly 3 is further included, and the discharging assembly 3 is detachably connected to the sterilizing box 2, and the discharging assembly 3 is used for discharging the sterilized milk powder.

[0026] The discharge assembly 3 includes a discharge barrel 31 and a discharge hopper 32 . The discharge barrel 31 and the discharge hopper 32 are both detachably connected to the sterilization box 2 , and the discharge hopper 32 is located in the discharge barrel 31 .

[0027] In the above optional embodiments, it should be noted that the discharge assembly 3 also includes a first valve 33 and a second valve 34. The first valve 33 is arranged at the discharge port of the discharge funnel 32 by means of screw connection or snap connection, and the second valve 34 is arranged at the discharge port of the discharge barrel 31 by means of screw connection or snap connection. The discharge barrel 31 and the discharge funnel 32 are both connected to the sterilization box 2 by means of screw connection or snap connection, and an internal tilting platform 35 is integrally formed in the discharge barrel 31.

[0028] The beneficial effects of the above optional embodiments are as follows: when the sterilization of the milk powder is completed, the sterilization box 2 can be rotated to swap the head and tail of the sterilization box 2, and then a valve 33 is opened to allow the milk powder inside the sterilization box 2 to fall into the discharge barrel 31 through the discharge port of the discharge funnel 32 and be collected, and then the second valve 34 is opened to discharge the collected sterilized milk powder through the discharge port of the discharge barrel 31. After the milk powder is completely discharged, the sterilization box 2 is rotated to its original position, thereby realizing the reliable discharge of the sterilized milk powder from the sterilization box 2.

[0029] Optional, such as Figure 2 and Fig. 9 to Fig.12 As shown, in some embodiments, the powder blowing assembly 8 includes an air inlet pipe 84, an annular air pipe 82 and an air inlet nozzle 83. The air inlet pipe 84 is connected to the side of the annular air pipe 82, and multiple air inlet nozzles 83 are evenly spaced on the annular air pipe 82. The multiple air inlet nozzles 83 can be detachably connected to the bottom of the sterilization box 2 and connected to the inside of the sterilization box 2. The end of the air inlet pipe 84 away from the annular air pipe 82 is connected to an air pump.

[0030] In the above optional embodiment, it should be noted that the powder blowing assembly 8 also includes an air intake plate 81, and multiple air intake nozzles 83 are all inserted on the air intake plate 81 by screwing and connected to the sterilization box 2; specifically, multiple air intake holes 24 are opened at the bottom of the sterilization box 2, and multiple air intake nozzles 83 pass through the air intake plate 81 and are inserted on the air intake holes 24 one by one and are connected to the interior of the sterilization box through the air intake holes 24.

[0031] The beneficial effect of the above optional embodiment is that the milk powder inside the sterilization box 2 can be quickly and reliably lifted up by the coordinated arrangement of the air inlet pipe 84 , the annular air pipe 82 and the air inlet nozzle 83 .

[0032] Optional, such as Figure 1 , Figure 3 , Figure 4 and Figure 7 As shown, in some embodiments, a driving device 5 is further included. The side wall of the support frame 1 is connected to the driving device 5, and the driving device 5 is used to drive the sterilization box 2 to rotate.

[0033] The driving device 5 includes a servo motor 52, a first gear 53 and a second gear 54. The first gear 53 is connected to the output shaft of the servo motor 52, and the second gear 54 is meshed with the first gear 53. The second gear 54 is rotatably connected to the support frame 1 through a rotating shaft 55. The end of the rotating shaft 55 away from the second gear 54 passes through the support frame 1 and is fixedly connected to the sterilization box 2.

[0034] In the above optional embodiment, it should be noted that the driving device 5 also includes a motor bracket 51 and a clamping block 56. The motor bracket 51 is installed on the outer wall of the support frame 1 by screwing, and the servo motor 52 is installed on the motor bracket 51 by screwing. The clamping block 56 is arranged at the end of the rotating shaft 55 away from the second gear 54 by welding or clamping, and the rotating shaft 55 is fixed to the inner wall of the sterilization box 2 by the clamping block 56.

[0035] The beneficial effect of the above optional embodiment is: the servo motor 55 drives the first gear 53 to rotate, drives the second gear 54 to rotate, drives the rotating shaft 55 to rotate, and drives the sterilization box 15 to rotate, so that the sterilization box 2 can achieve reliable and smooth head-to-tail exchange.

[0036] Optional, such as Figure 2 and Figure 8 As shown, in some embodiments, a powder scraping device 6 is also included, which includes a scraping ring 62 and a telescopic cylinder 61. The scraping ring 62 is arranged in the sterilization box 2, and the bottom of the telescopic box is connected to the telescopic cylinder 61, and the telescopic rod of the telescopic cylinder 61 is connected to the scraping ring 62.

[0037] In the above optional embodiments, it should be noted that the telescopic rod of the telescopic cylinder 61 is connected to the scraper ring 62 by means of snap connection or screw connection; during the sterilization of milk powder, the telescopic cylinder 61 can be started to push the scraper ring 62 to move up and down, so that the scraper ring 62 fits the inner wall of the sterilization box 15 to scrape the inner wall of the sterilization box 15, remove the milk powder adhering to the inner wall of the sterilization box 15, and ensure the sterilization effect of the milk powder; a socket 25 is provided at the bottom of the sterilization box 2, and the telescopic rod of the telescopic cylinder 61 passes through the socket 25 and is inserted into the hanging ring 62 to drive the scraper ring 62 to move up and down.

[0038] Optional, such as Figure 2 , Figure 5 , Figure 6 and Fig.12 As shown, in some embodiments, a cleaning assembly 7 is further included, and the cleaning assembly 7 includes an annular water inlet pipe 71, a water branch pipe 73 and a water inlet pipe 74. A plurality of water branch pipes 73 are arranged at intervals on the annular water inlet pipe 71. The plurality of water branch pipes 73 are connected to the bottom wall of the sterilization box 2 and are connected to the sterilization box 2. The side of the annular water inlet pipe 71 is connected to the water inlet pipe 74, and the end of the water inlet pipe 74 away from the annular water inlet pipe 71 is connected to a water pump. The annular water inlet pipe (71), the water branch pipe (73) and the water inlet pipe (74) are made of high-purity quartz glass.

[0039] In the above optional embodiments, it should be noted that the device also includes a base 9, which is connected to the bottom wall of the sterilization box 2 by means of screw connection, clamping connection or welding, and the annular water inlet pipe 71 and the annular air pipe 82 are both installed on the base 9 by means of screw connection or clamping connection and are located between the base 9 and the bottom wall of the sterilization box 2; in addition, the cleaning component 7 also includes a one-way valve 72, and each water branch pipe 73 is provided with a one-way valve 72, and the water branch pipe 73 and the annular water inlet pipe 71 and the water inlet pipe 74 and the annular water inlet pipe 71 are all connected by screw connection; a plurality of water inlet holes 26 are opened at the bottom of the sterilization box 2, and a plurality of water inlet pipes 74 are inserted into the water inlet holes 26 one by one to enable water to conveniently enter the sterilization box 2.

[0040] The beneficial effects of the above optional embodiments are as follows: through the coordinated arrangement of the annular water inlet pipe 71, the water distribution pipe 73 and the water inlet pipe 74, when the device needs to be cleaned, the sterilization box 2 can be rotated to replace the head and tail, and the water pump is started to quickly inject water into the sterilization box 2. The water will also flow on the scraper ring 62, and the scraper ring 62 is moved up and down to cooperate with the water flow to achieve cleaning in the sterilization box 2. After cleaning is completed, the first valve 33 and the second valve 34 are opened to discharge the water, and then the sterilization box 2 is rotated again to reset it, and the cleaning is completed.

[0041] Optional, such as Figure 2 and Figure 5 As shown, in some embodiments, an inner light-transmitting barrel 21 is further included. The inner light-transmitting barrel 21 is arranged in the sterilization box 2. A plurality of ultraviolet sterilization lamps 22 are located between the inner light-transmitting barrel 21 and the sterilization box 2. The inner light-transmitting barrel 21 is made of high-purity quartz plate material.

[0042] In the above optional embodiment, it should be noted that the scraper ring 62 abuts against the inner wall of the inner light-transmitting barrel 21 .

[0043] The beneficial effect of the above optional embodiment is: the setting of the inner light-transmitting barrel 21 prevents milk powder from falling onto the ultraviolet sterilization lamp 22, and the milk powder on the inner wall of the inner light-transmitting barrel 21 can be directly cleaned by the scraper ring 62, thereby ensuring the irradiation and sterilization effect of the ultraviolet sterilization lamp 22.

[0044] Optional, such as Figure 1 and Figure 3 As shown, in some embodiments, a suction machine 4 is also included, a suction pipe 42 of the suction machine 4 is connected to the milk powder pile, and a feeding pipe 43 of the suction machine 4 is connected to the sterilization box 2.

[0045] In the above optional embodiment, it should be noted that the suction machine 4 includes a suction machine body 41, a suction pipe 42 and a feeding pipe 43. The suction machine body 41 can be an existing vacuum suction machine, and the feeding pipe 43 is a hose structure.

[0046] The beneficial effect of the above optional embodiment is that through the setting of the suction machine 4, the whole pile of milk powder that needs to be sterilized can be sucked through the suction pipe 42, and then passed through the suction machine body 41 and the feeding pipe 43 and then continuously fed into the sterilization box 2 to sterilize the milk powder, thereby avoiding manual operation and increasing the reliability of milk powder sterilization.

[0047] The sterilization steps of this device are: S1: The milk powder to be sterilized is transported into the sterilization box 2 by using the suction machine 4; S2: After the milk powder to be sterilized is spread on a layer at the bottom of the sterilization box, the air pump is turned on to allow the gas to pass through the air inlet pipe 84, the annular air pipe 82 and the air inlet nozzle 83 in sequence and then enter the sterilization box 2, so that the milk powder in the sterilization box 2 forms turbulence, and the ultraviolet sterilization lamp 22 is turned on to sterilize the raised milk powder. The sterilization time is 2-5 minutes, and the gas is nitrogen; S3: Open the telescopic cylinder 6 to drive the scraper ring to move up and down in the sterilization box 2 to scrape off the milk powder adhered to the inner wall; S4: After the sterilization is completed, the driving device 5 is turned over to turn the sterilization box 2, and the first valve 33 and the second valve 34 are opened to pour out the sterilized milk powder, thereby completing the sterilization of the milk powder.

[0048] S5: Turn on the water pump to let water enter the sterilization box 2 through the water inlet pipe 74, the annular water inlet pipe 71, the one-way valve 72 and the water distribution pipe 73 in sequence to clean the inside of the sterilization box 2; S6: After the cleaning is completed, the servo motor 52 works to flip the sterilization box 2 and reset it.

[0049] The milk powder cold sterilization device provided by the present invention is used to carry out sterilization experiments, such as Fig.13 and 14 Take 10 g of milk powder and add it to a sterile culture dish, add 1 mL of Staphylococcus aureus solution (10 6 CFU / mL), dried for 1 h, sealed with plastic wrap, pierced with a toothpick, and placed in a vacuum drying oven for 24 h (40°C). After that, ground it in a sterilized mortar and dried in a vacuum drying oven for 24 h (40°C). After grinding again, take 8 g and add it to 16 g milk powder and mix well (the final concentration of spiked bacteria is 3.3*10 4 CFU / g), 4 g was placed on a sterile culture dish for time gradient sterilization, the sterilization time was (0 min, 2 min, 3 min, 4 min, 5 min), and the determination of Staphylococcus aureus was performed using a special culture medium Baird-Parker for bacterial count; another 4 g was placed on a sterile culture dish for time gradient sterilization, the sterilization time was (0 min, 2 min, 3 min, 4min, 5 min), and pH was measured using a pH meter. Fig.13As shown in the figure, with the increase of sterilization time, the colony count of Staphylococcus aureus gradually decreased, and the sterilization rate of the corresponding bacteria increased gradually. The sterilization rate of milk powder after 5 minutes of sterilization reached more than 93.7%, and the order of magnitude of bacteria reduction was about 1.2 Log. Fig.14 As shown in the figure, it can be seen that the increase in sterilization time does not change the pH change of milk powder. It can be seen that this sterilization technology can not only reduce microorganisms, but also will not cause changes in the quality of milk powder. In addition, this sterilization method is a static sterilization simulation of the equipment, and it is not blown into the air. Its contact area is small. If its contact area is increased, the sterilization efficiency will be better improved.

[0050] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A milk powder cold sterilization device, It is characterized in that include: A sterilization box (2), a support frame (1), an ultraviolet sterilization lamp (22) and a powder blowing assembly (8), wherein the support frame (1) is rotatably connected to the sterilization box (2), a plurality of ultraviolet sterilization lamps (22) are arranged at intervals on the inner side wall of the sterilization box (2), and the powder blowing assembly (8) is arranged at the bottom of the sterilization box (2).

2. The milk powder cold sterilization device according to claim 1, Features: It also comprises a discharging assembly (3), the discharging assembly (3) being detachably connected to the sterilizing box (2), and the discharging assembly (3) being used for discharging sterilized milk powder.

3. The milk powder cold sterilization device according to claim 2, Features: The discharge assembly (3) comprises a discharge barrel (31) and a discharge hopper (32); the discharge barrel (31) and the discharge hopper (32) are both detachably connected to the sterilization box (2); and the discharge hopper (32) is located inside the discharge barrel (31).

4. The milk powder cold sterilization device according to claim 1, Features: The powder blowing assembly (8) comprises an air inlet pipe (84), an annular air pipe (82) and an air inlet nozzle (83); the air inlet pipe (84) is connected to the side of the annular air pipe (82); a plurality of the air inlet nozzles (83) are arranged at equal intervals on the annular air pipe (82); the plurality of the air inlet nozzles (83) are all detachably connected to the bottom of the sterilization box (2) and are connected to the inside of the sterilization box (2); and an end of the air inlet pipe (84) facing away from the annular air pipe (82) is connected to an air pump.

5. The milk powder cold sterilization device according to claim 1, Features: It also comprises a driving device (5), the side wall of the support frame (1) is connected to the driving device (5), and the driving device (5) is used to drive the sterilization box (2) to rotate.

6. The milk powder cold sterilization device according to claim 5, Features: The driving device (5) comprises a servo motor (52), a first gear (53) and a second gear (54); the first gear (53) is connected to an output shaft of the servo motor (52); the second gear (54) is meshed with the first gear (53); the second gear (54) is rotatably connected to the support frame (1) via a rotating shaft (55); an end of the rotating shaft (55) facing away from the second gear (54) passes through the support frame (1) and is fixedly connected to the sterilization box (2).

7. The milk powder cold sterilization device according to claim 1, Features: It also comprises a powder scraping device (6), the powder scraping device (6) comprising a scraping ring (62) and a telescopic cylinder (61), the scraping ring (62) being arranged in the sterilizing box (2), the bottom of the telescopic box being connected to the telescopic cylinder (61), and the telescopic rod of the telescopic cylinder (61) being connected to the scraping ring (62).

8. The milk powder cold sterilization device according to claim 1, Features: It also comprises a cleaning component (7), the cleaning component (7) comprising an annular water inlet pipe (71), a water branch pipe (73) and a water inlet pipe (74), a plurality of the water branch pipes (73) being arranged at intervals on the annular water inlet pipe (71), the plurality of the water branch pipes (73) being connected to the bottom wall of the sterilizing box (2) and communicating with the inside of the sterilizing box (2), the side of the annular water inlet pipe (71) being connected to the water inlet pipe (74), and one end of the water inlet pipe (74) facing away from the annular water inlet pipe (71) being connected to a water pump, and the cleaning component (7) is made of polytetrafluoroethylene.

9. The milk powder cold sterilization device according to claim 1, Features: It also comprises an inner light-transmitting barrel (21), the inner light-transmitting barrel (21) being arranged inside the sterilization box (2), a plurality of ultraviolet sterilization lamps (22) being located between the inner light-transmitting barrel (21) and the sterilization box (2), and the inner light-transmitting barrel (21) being made of high-purity quartz glass.

10. The milk powder cold sterilization device according to claim 1, Features: It also comprises a suction machine (4), wherein a suction pipe (42) of the suction machine (4) is connected to the milk powder pile, and a feeding pipe (43) of the suction machine (4) is connected to the sterilization box (2).

11. A sterilization method using the cold sterilization device according to any one of claims 1 to 10, It is characterized in that The steps include: S1: using a suction machine (4) to transport the milk powder to be sterilized into a sterilization box (2); S2: After the milk powder to be sterilized is spread on a layer at the bottom of the sterilization box, the air pump is turned on to allow the gas to pass through the air inlet pipe (84), the annular air pipe (82) and the air inlet nozzle (83) in sequence and then enter the sterilization box (2), so that the milk powder in the sterilization box (2) forms a turbulent flow, and the ultraviolet sterilization lamp (22) is turned on to sterilize the raised milk powder. The sterilization time is 2-5 minutes, and the gas is nitrogen; S3: opening the telescopic cylinder (6) to drive the scraper ring to move up and down in the sterilizing box (2) to scrape off the milk powder adhered to the inner wall; S4: After the sterilization is completed, the driving device (5) is turned on to flip the sterilization box (2), and the first valve (33) and the second valve (34) are opened to pour out the sterilized milk powder, thereby completing the sterilization of the milk powder.

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