Nitrogen making machine for food processing

Abstract

The invention relates to a nitrogen making machine for food processing, which comprises a temperature sensor, a controller and a driving part, a female rotor is slidably connected with the machine body, the temperature sensor is connected with the female rotor, the temperature sensor is electrically connected with the controller, the driving part is connected with the female rotor, the driving part is electrically connected with the controller, and the controller is electrically connected with the controller. The controller is used for controlling the driving part to drive the female rotor to move, and the female rotor is connected with the movable plate close to the lower portion of one side of the female rotor. Due to the adoption of the technical scheme, the positive rotor and the negative rotor in the air compressor can reduce the possibility of rigid collision caused by expansion of one end close to the output end due to over-high temperature to a certain extent, and reduce the possibility of chippings caused by mutual collision after expansion of the positive rotor and the negative rotor; therefore, the possibility that the compressed air carries metal scraps is reduced, and the nitrogen making effect is ensured to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen generators, and in particular to a nitrogen generator for food processing. Background Art

[0002] Liquid nitrogen has a boiling point of -196°C at normal pressure and absorbs a large amount of heat when vaporized. It is suitable for rapid freezing scenarios (such as quick-frozen food production lines). Liquid nitrogen is used for quick freezing of foods (such as seafood, fruits and vegetables) to inhibit microbial activity. At the same time, ultra-low temperature crushing technology is used to process heat-sensitive raw materials (such as spices) to preserve flavor and nutrients. Due to the high energy consumption of liquid nitrogen storage and transportation, it is usually necessary to use a nitrogen generator or liquid nitrogen tank to achieve continuous supply. A nitrogen generator is a nitrogen production device designed and manufactured using pressure swing adsorption technology. Using high-quality imported carbon molecular sieve (CMS) as the adsorbent, it utilizes pressure swing adsorption (PSA) at room temperature to separate air and produce high-purity nitrogen. Before entering the adsorption tower, the air is compressed to a certain pressure to facilitate adsorption by the molecular sieve.

[0003] Screw air compressors are often used in food nitrogen generators for air compression due to their high performance, high efficiency, maintenance-free, and high reliability. Their structure is that the motor drives the two rotors to rotate, allowing air to enter from the openings on the inlet end walls of the two rotors and fill them with air. When the inlet side end face of the rotor turns away from the air inlet of the shell, the air between the tooth grooves is enclosed between the female rotor, the male rotor and the shell, completing the suction process. The enclosed volume formed by the tooth peaks of the master and slave rotors and the shell decreases as the rotor angle changes. The gas is continuously compressed and then discharged from the output end, thus completing the air compression. However, the heat generated by the compressed air at the air output end of the female rotor and the male rotor can easily cause the volume expansion of the female rotor and the male rotor. The female rotor and the male rotor can easily produce rigid collision and metal debris due to the volume expansion at the air output end, which not only reduces the service life of the female rotor and the male rotor, but also easily causes metal debris to be carried in the compressed air, thereby reducing the purity of nitrogen produced by the nitrogen generator and affecting the preservation of food; at the same time, the volume expansion can easily cause the female rotor and the male rotor to get stuck with each other, causing the air compressor to stop, and then causing the entire nitrogen generator to stop, thereby pausing the entire preservation process. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a nitrogen generator for food processing, so as to solve the problem in the prior art that the heat generated by the compressed air at the air output end of the negative rotor and the positive rotor easily causes the volume expansion of the negative rotor and the positive rotor, and the negative rotor and the positive rotor easily produce rigid collision and metal debris due to the volume expansion at the air output end, which not only reduces the service life of the negative rotor and the positive rotor, but also easily causes metal debris to be contained in the compressed air, thereby reducing the purity of nitrogen produced by the nitrogen generator and affecting the freshness of food.

[0005] The present invention is achieved through the following technical solutions: A nitrogen generator for food processing, comprising an air compressor, the air compressor comprising a male rotor, a female rotor, a body, a first motor and a cooling mechanism, an input end and an output end are respectively provided at both ends of the body, the male rotor and the female rotor are both provided in the body, the first motor is connected to the inner side wall of the body on the side where the input end is located, the output shaft of the first motor is connected to one end of the male rotor, the other end of the male rotor is rotatably connected to the inner side wall of the body on the side where the output end is located, the female rotor is rotatably connected to the body, the ends of the male rotor and the female rotor close to the input end are both provided with a first gear, the two first gears are meshed with each other, the male rotor is meshed with the female rotor, and the cooling mechanism The cooling mechanism is arranged on one side of the machine body near the output end, and is used to cool down one end of the female rotor and the male rotor near the output end, and also includes a movable plate, the cross section of the movable plate is composed of a quarter circular arc segment and an extended segment extended from the two end points of the circular arc segment along the tangential direction, and there are four movable plates, and the four movable plates enclose an air channel with a rounded rectangular cross section, and the four movable plates are slidably pressed against the two inner side walls corresponding to the input end and the output end of the machine body at both ends along the length direction of the female rotor, and the two end surfaces corresponding to the cross-sectional extension segments of the four movable plates are slidably connected in pairs with respect to each other, and the movable plate above the side near the male rotor among the four movable plates is fixedly connected to the machine body; It also includes a temperature sensor, a controller and a driving unit. The female rotor is slidably connected to the body. The temperature sensor is connected to the female rotor. The temperature sensor is electrically connected to the controller. The driving unit is connected to the female rotor. The driving unit is electrically connected to the controller. The controller is used to control the driving unit to drive the female rotor to move. The female rotor is connected to a movable plate near the bottom of one side of the female rotor.

[0006] Furthermore, the inner side wall of the output end and the input end of the body are both recessed inward to form a second chute, and a slider is slidably connected in the second chute. The two ends of the female rotor are rotatably connected to the two sliders in a one-to-one correspondence. Furthermore, the controller includes an identification module, a calculation module and an execution module. The identification module is used to identify the temperature signal sent by the temperature sensor, the calculation module is used to convert the temperature signal into volume expansion data of the female rotor and calculate the displacement data of the female rotor, and the execution module is used to control the driving part to drive the movable plate to move.

[0007] The cam is connected to the second end of the movable plate and the second end of the movable plate is connected to the cam by the second end of the movable plate.

[0008] Furthermore, the cooling mechanism includes a cooling spray pipe, an adjusting part, a moving block and a perforated plate, there are four moving blocks, the cross-section of the moving block is an isosceles right triangle, there are four moving blocks, and the four moving blocks are arranged in a circular array, and the four moving blocks enclose a closed square channel, and the right-angled sides of the four moving blocks are respectively opposite to each other in the vertical direction and the horizontal direction, and the adjacent side faces of the right-angled sides of the cross-section of the four moving blocks are fitted with the other side faces adjacent to the right-angled sides of the cross-section of the adjacent moving blocks; the upper end face of the air channel enclosed by the four movable plates is penetrated by an opening, the maximum size of the opening corresponds to the maximum size of the closed square channel enclosed by the four moving blocks, the perforated plate is matched with the opening, the lower end faces of the four moving blocks abut the upper end face of the air channel, the output end of the cooling spray pipe is connected to the upper end faces of the four moving blocks, and the adjusting part is used to adjust the movement of the moving block on the upper end face of the air channel.

[0009] Furthermore, the adjusting part includes a rack, a second gear, an inner gear ring and a pushing part, the rack is fixed to the side surface of the hypotenuse of the moving block cross section, the rack is arranged along the length direction of the hypotenuse of the moving block cross section, the second gear is rotatably connected to the body, the second gear is engaged with the rack, the inner gear ring is rotatably connected to the body, the inner gear ring is engaged with the second gear, and the pushing part is used to push the second gear to rotate.

[0010] Furthermore, the pushing part includes an arc-shaped rack and a third gear, the arc-shaped rack is connected to the female rotor, the third gear is connected to the second gear corresponding to the movable plate above the side of the four movable plates close to the male rotor, and the arc-shaped rack is meshed with the third gear.

[0011] The beneficial effects of the present invention are: When using the nitrogen generator for food processing of the present invention to produce nitrogen, the male rotor and the female rotor in the air compressor can, to a certain extent, reduce the possibility of rigid collision due to the expansion of the end close to the output end due to excessive temperature, and reduce the possibility of debris generated by the male rotor and the female rotor colliding with each other after expansion, thereby reducing the possibility of compressed air containing metal debris, and ensuring the nitrogen production effect to a certain extent.

[0012] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural front view of the present invention; Figure 2 It is a schematic structural diagram of the machine body of the present invention after being cut open; Figure 3 This is a schematic diagram of the structure of the present invention after removing the body and a movable plate; Figure 4 This is a top view of the structure of the present invention without the body; Figure 5 This is a schematic diagram of the connection between the female rotor and the body of the present invention; Figure 6 This is a cross-sectional view of the connection between the female rotor and the driving part of the present invention.

[0014] In the figure: 1. body; 11. input end; 12. output end; 13. slider; 21. male rotor; 22. female rotor; 221. groove; 222. second internal thread; 23. first gear; 3. first motor; 4. cooling mechanism; 41. cooling spray pipe; 42. adjusting part; 421. rack; 422. second gear; 423. internal gear ring; 424. arc-shaped rack; 425. third gear; 43. moving block; 44. perforated plate; 5. movable plate; 6. driving part; 61. sleeve; 611. first internal thread; 62. rotating rod; 621. first external thread; 622. second external thread; 623. first slide groove; 63. second motor; 64. slide rod. DETAILED DESCRIPTION

[0015] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0016] See also Figure 1-6 The present invention provides a technical solution for a nitrogen generator for food processing: a nitrogen generator for food processing, comprising an air compressor, the air compressor comprising a male rotor 21, a female rotor 22, a body 1, a first motor 3 and a cooling mechanism 4, the two ends of the body 1 are respectively provided with an input end 11 and an output end 12, the male rotor 21 and the female rotor 22 are both arranged in the body 1, the first motor 3 is connected to the inner side wall of the body 1 on the side where the input end 11 is located, the output shaft of the first motor 3 is connected to one end of the male rotor 21, the other end of the male rotor 21 is rotatably connected to the inner side wall of the body 1 on the side where the output end 12 is located, the female rotor 22 is rotatably connected to the body 1, the ends of the male rotor 21 and the female rotor 22 close to the input end 11 are both provided with a first gear 23, the two first gears 23 are meshed with each other, the The male rotor 21 is meshed with the female rotor 22, and the cooling mechanism 4 is provided on the side of the body 1 close to the output end 12. The cooling mechanism 4 is used to cool the female rotor 22 and the end of the male rotor 21 close to the output end 12, and also includes a movable plate 5. The cross-section of the movable plate 5 is composed of a quarter-circular arc segment and an extended segment extended by the two end points of the arc segment along the tangential direction. There are four movable plates 5, and the four movable plates 5 enclose an air channel with a rounded rectangular cross-section. The four movable plates 5 are slidably pressed against the two inner side walls corresponding to the input end 11 and the output end 12 of the body 1 at both ends along the length direction of the female rotor 22. The two end surfaces corresponding to the cross-sectional extension segments of the four movable plates 5 are slidably connected in pairs. The movable plate 5 above the side close to the male rotor 21 among the four movable plates 5 is fixedly connected to the body 1; It also includes a temperature sensor, a controller and a driving unit 6. The female rotor 22 is slidably connected to the body 1. The temperature sensor is connected to the female rotor 22. The temperature sensor is electrically connected to the controller. The driving unit 6 is connected to the female rotor 22. The driving unit 6 is electrically connected to the controller. The controller is used to control the driving unit 6 to drive the female rotor 22 to move. The female rotor 22 is connected to the movable plate 5 near the bottom of one side of the female rotor 22.

[0017] When using a nitrogen generator for food processing of the present invention to generate nitrogen, first start the first motor 3 to enable the air compressor to compress the air. The rotation of the first motor 3 drives the female rotor 22 and the male rotor 21 to rotate relative to each other, so that the air is gradually compressed from the input end 11 to the output end 12 of the air compressor. At the output end 12 of the air compressor, the compressed air causes the temperature of the end of the male rotor 21 and the female rotor 22 close to the output end 12 to rise. The temperature sensor senses the temperature of the output end 12 of the male rotor 21 and the female rotor 22 and sends an electrical signal to the controller. After receiving the electrical signal from the temperature sensor, the controller controls the drive unit 6 to drive the female rotor 22 to move away from the male rotor 21, thereby reducing to a certain extent the rigid collision between the output ends 12 of the male rotor 21 and the female rotor 22 due to volume expansion due to temperature increase.

[0018] Furthermore, since the two end surfaces corresponding to the cross-sectional extensions of the four movable plates 5 are connected in relative sliding connection with each other, the female rotor 22 is connected to the movable plate 5 below one side of the female rotor 22. The movement of the female rotor 22 in the direction away from the male rotor 21 will drive the movable plate 5 close to it to move, thereby enlarging the air channel formed by the four movable plates 5, so that the air channel can become larger as the male rotor 21 and the female rotor 22 expand, thereby reducing to a certain extent the possibility of collision between the female rotor 22 and the male rotor 21 and the movable plate 5 due to volume expansion.

[0019] With this structure, when using a nitrogen generator for food processing of the present invention to generate nitrogen, the male rotor 21 and the female rotor 22 in the air compressor can, to a certain extent, reduce the possibility of rigid collision due to the expansion of the end close to the output end 12 due to excessive temperature, and reduce the possibility of debris generated by the male rotor 21 and the female rotor 22 colliding with each other after expansion, thereby reducing the possibility of compressed air containing metal debris, and ensuring the nitrogen generation effect to a certain extent.

[0020] Specifically, the end surface of the extended section on one side of the movable plate 5 is convex to form a convex portion, and the end surface of the extended section on the other side of the movable plate 5 is concave to form a concave portion. The convex portion of any of the movable plates 5 can be slidably matched with the concave portion of the adjacent movable plate 5. With this structure, the corresponding end surfaces of the cross-sectional extension sections of the four movable plates 5 can be slidably connected in pairs.

[0021] In this embodiment: the inner side walls of the body 1 on the side where the output end 12 and the input end 11 are located are recessed inward to form a second sliding groove, and the second sliding groove is slidably connected with a slider 13. The two ends of the female rotor 22 are rotatably connected to the two sliders 13 one by one. With this structure, the female rotor 22 can be slidably connected to the body 1.

[0022] In this embodiment: the controller includes an identification module, a calculation module and an execution module. The identification module is used to identify the temperature signal sent by the temperature sensor, the calculation module is used to convert the temperature signal into volume expansion data of the female rotor 22 and calculate the displacement data of the female rotor 22, and the execution module is used to control the driving part 6 to drive the movable plate 5 to move.

[0023] When the temperature of the female rotor 22 rises due to compressed air, the controller identifies and calculates the data of how the female rotor 22 should move at the corresponding temperature, and then controls the driving unit 6 through the execution module to drive the movable plate 5 to move. This allows the air channel formed by the four movable plates 5 to become larger as the female rotor 22 expands, reducing to a certain extent the possibility of the female rotor 22 and the male rotor 21 rigidly colliding with the movable plate 5 due to the increase in volume, and ensuring to a certain extent the efficiency of the compressed air.

[0024] When the temperature of the female rotor 22 decreases, the temperature sensor senses the temperature and controls the female rotor 22 to move toward the male rotor 21 , so that the meshing of the male rotor 21 and the female rotor 22 is always in a state suitable for compressing air to a certain extent.

[0025] In this embodiment: the output end 12 of the female rotor 22 is recessed inward to form a groove 221, and the inner wall of the groove 221 is formed with a second internal thread 222; the driving part 6 includes a sleeve 61, a rotating rod 62, a second motor 63 and a sliding rod 64, the sleeve 61 is connected to the inner wall of the movable plate 5 below the side of the female rotor 22, and the inner wall of the end of the sleeve 61 away from the inner wall of the movable plate 5 is provided with a first internal thread 611, the rotating rod 62 is arranged along the diagonal direction of the air channel with a rounded rectangular cross section formed by the four movable plates 5, one end of the rotating rod 62 is fitted into the sleeve 61, and the other end is fitted into the groove 22 1, a first external thread 621 is provided in the middle of the rotating rod 62, and a second external thread 622 is provided at the other end of the rotating rod 62. The first internal thread 611 is screwed with the first external thread 621, and the second internal thread 222 is screwed with the second external thread 622. The second motor 63 is provided in the sleeve 61, and the output end 12 of the second motor 63 is connected to one end of the sliding rod 64. The cross-section of the sliding rod 64 is non-circular. The one end of the rotating rod 62 is recessed inward to form a first sliding groove 623. The sliding rod 64 is slidably fitted in the first sliding groove 623. The second motor 63 is connected to the controller signal.

[0026] When the temperature sensor receives the temperature signal and sends the signal to the controller, when the calculation module of the controller determines that the female rotor 22 needs to move, it sends a control signal to the second motor 63 to make the second motor 63 start to rotate. The rotation of the second motor 63 drives the rotating rod 62 to rotate. Since the inner wall of the groove 221 is formed with a second internal thread 222, the other end of the rotating rod 62 is provided with a second external thread 622, and the second internal thread 222 is screwed with the second external thread 622. When the rotating rod 62 rotates, the rotating rod 62 can move in the direction toward the female rotor 22. Since the inner wall of one end of the sleeve 61 away from the inner wall of the movable plate 5 is provided with a first internal thread 611, the middle part of the rotating rod 62 is provided with a first external thread 621, and the first internal thread 611 is screwed with the first external thread 621. When the rotating rod 62 rotates, the sleeve 61 drives the movable plate 5 connected to the sleeve 61 to move toward the female rotor 22, so that the driving part 6 drives the female rotor 22 to move while also driving the movable plate 5 to move relatively, so that the air channel formed by the movable plate 5 can adapt to the expansion of the female rotor 22 to a certain extent.

[0027] In this embodiment: the cooling mechanism 4 includes a cooling spray pipe 41, an adjusting portion 42, a moving block 43 and a perforated plate 44, there are four moving blocks 43, the cross section of the moving block 43 is an isosceles right triangle, there are four moving blocks 43, the four moving blocks 43 are arranged in a ring array, the four moving blocks 43 enclose a closed square channel, the right angles of the four moving blocks 43 are respectively opposite to each other in the vertical direction and the horizontal direction, the right angles of the cross sections of the four moving blocks 43 are adjacent to one side and the right angles of the cross sections of the moving blocks 43 adjacent to it The other side surface adjacent to the edge is fitted together; the upper end surface of the air channel formed by the four movable plates 5 is formed with an opening, the maximum size of the opening corresponds to the maximum size of the closed square channel enclosed by the four movable blocks 43, the perforated plate 44 is matched with the opening, the lower end surfaces of the four movable blocks 43 are against the upper end surface of the air channel, the output end 12 of the cooling spray pipe 41 is connected to the upper end surfaces of the four movable blocks 43, and the adjusting part 42 is used to adjust the movement of the movable block 43 on the upper end surface of the air channel.

[0028] By adjusting the movement of the moving block 43 on the upper end surface of the air channel through the adjustment portion 42, the closed square channel enclosed by the four moving blocks 43 can be enlarged or reduced. This structure can adjust the amount of cooling spray passing through the perforated plate 44.

[0029] In this embodiment: the adjusting portion 42 includes a rack 421, a second gear 422, an inner gear ring 423 and a pushing portion, the rack 421 is fixedly connected to the side surface of the hypotenuse of the cross section of the moving block 43, and the rack 421 is arranged along the length direction of the hypotenuse of the cross section of the moving block 43, the second gear 422 is rotatably connected to the body 1, the second gear 422 is engaged with the rack 421, the inner gear ring 423 is rotatably connected to the body 1, the inner gear ring 423 is engaged with the second gear 422, and the pushing portion is used to push the second gear 422 to rotate.

[0030] Since the second gear 422 is engaged with the rack 421, the inner gear ring 423 is rotatably connected to the body 1, and the inner gear ring 423 is engaged with the third gear 425. The second gear 422 is pushed to rotate by the pushing portion, which can drive the moving block 43 to move horizontally, thereby making the square channel formed by the four moving blocks 43 larger or smaller. With this structure, the adjusting portion 42 can adjust the cross-sectional area of ​​the closed square channel enclosed by the four moving blocks 43.

[0031] In this embodiment: the pushing part includes an arc-shaped rack 424 and a third gear 425, the arc-shaped rack 424 is connected to the female rotor 22, and the third gear 425 is connected to the second gear 422 corresponding to the movable plate 5 above the side close to the male rotor 21 among the four movable plates 5, and the arc-shaped rack 424 is engaged with the third gear 425.

[0032] Since the arc-shaped rack 424 is connected to the female rotor 22, when the female rotor 22 expands and moves, it will drive the arc-shaped rack 424 to move. Since the arc-shaped rack 424 is engaged with the third gear 425, the movement of the arc-shaped rack 424 drives the third gear 425 to rotate. Since the third gear 425 is connected to the second gear 422 corresponding to the movable plate 5 above the side of the four movable plates 5 close to the male rotor 21, the rotation of the third gear 425 drives the second gear 422 to rotate, thereby enlarging or shrinking the square channel. With this structure, the flow rate of the cooling spray can be increased while the female rotor 22 moves, and the flow rate of the cooling spray becomes smaller when the temperature of the female rotor 22 decreases, which can save energy to a certain extent.

[0033] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A nitrogen generator for food processing, comprising an air compressor, the air compressor comprising a male rotor, a female rotor, a body, a first motor and a cooling mechanism, wherein an input end and an output end are respectively provided at both ends of the body, the male rotor and the female rotor are both provided in the body, the first motor is connected to the inner side wall of the body on the side where the input end is located, the first motor output shaft is connected to one end of the male rotor, the other end of the male rotor is rotatably connected to the inner side wall of the body on the side where the output end is located, the female rotor is rotatably connected to the body, the ends of the male rotor and the female rotor close to the input end are both provided with a first gear, the two first gears are meshed with each other, the male rotor is meshed with the female rotor, the cooling mechanism is provided on the side of the body close to the output end, the cooling mechanism is used to cool the ends of the female rotor and the male rotor close to the output end, and is characterized in that: The cam is connected to the air conditioning unit by means of a cam which is adapted to move the air conditioning unit to the air conditioning unit, and the cam is connected to the air conditioning unit by means of a cam which is adapted to move the air conditioning unit to the air conditioning unit.

2. A nitrogen generator for food processing according to claim 1, characterized in that: The inner side walls of the body on the side where the output end and the input end are located are both recessed inward to form a second slide groove, and sliders are slidably connected in the second slide grooves. The two ends of the female rotor are rotatably connected to the two sliders in a one-to-one correspondence.

3. A nitrogen generator for food processing according to claim 2, characterized in that: The controller includes an identification module, a calculation module and an execution module. The identification module is used to identify the temperature signal sent by the temperature sensor. The calculation module is used to convert the temperature signal into the volume expansion data of the female rotor and calculate the displacement data of the female rotor. The execution module is used to control the driving part to drive the movable plate to move.

4. A nitrogen generator for food processing according to claim 3, characterized in that: The cam is connected to the inner wall of the movable plate near the lower part of the negative rotor, and the inner wall of the movable plate is provided with a first internal thread. The rotating rod is arranged along the diagonal direction of the air channel with a rounded rectangular cross section formed by four movable plates, one end of the rotating rod is fitted in the sleeve, and the other end is fitted in the groove. The middle of the rotating rod is provided with a first external thread, and the other end of the rotating rod is provided with a second external thread, the first internal thread is screwed with the first external thread, and the second internal thread is screwed with the second external thread. The second motor is arranged in the sleeve, and the output end of the second motor is connected to one end of the sliding rod, and the cross section of the sliding rod is non-circular. The one end of the rotating rod is recessed inwardly to form a first sliding groove, and the sliding rod is slidably fitted in the first sliding groove, and the second motor is connected to the controller signal.

5. A nitrogen generator for food processing according to claim 4, characterized in that: The cooling mechanism includes a cooling spray pipe, an adjusting part, a moving block and a perforated plate, wherein there are four moving blocks, the cross-section of the moving block is an isosceles right triangle, and the four moving blocks are arranged in a circular array, and the four moving blocks enclose a closed square channel, and the right-angled sides of the four moving blocks are respectively opposite to each other in the vertical direction and the horizontal direction, and the adjacent side faces of the right-angled sides of the cross-section of the four moving blocks are fitted with the other side faces adjacent to the right-angled sides of the cross-section of the adjacent moving blocks; the upper end face of the air channel enclosed by the four movable plates is penetrated by an opening, and the maximum size of the opening corresponds to the maximum size of the closed square channel enclosed by the four moving blocks, the perforated plate is matched with the opening, and the lower end faces of the four moving blocks abut the upper end face of the air channel, and the output end of the cooling spray pipe is connected to the upper end faces of the four moving blocks, and the adjusting part is used to adjust the movement of the moving block on the upper end face of the air channel.

6. A nitrogen generator for food processing according to claim 5, characterized in that: The adjusting portion includes a rack, a second gear, an inner gear ring and a pushing portion, the rack being fixedly connected to the side surface of the hypotenuse of the moving block cross section, the rack being arranged along the length direction of the hypotenuse of the moving block cross section, the second gear being rotatably connected to the machine body, the second gear being meshed with the rack, the inner gear ring being rotatably connected to the machine body, the inner gear ring being meshed with the second gear, and the pushing portion being used to push the second gear to rotate.

7. A nitrogen generator for food processing according to claim 6, characterized in that: The pushing part includes an arc-shaped rack and a third gear. The arc-shaped rack is connected to the female rotor. The third gear is connected to the second gear corresponding to the movable plate above the side of the four movable plates close to the male rotor. The arc-shaped rack is meshed with the third gear.

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