Detection equipment for lunch box processing
By using intelligent sensors and vibration flip components in lunch box detection equipment, the problem of the inability to accurately measure the gap size and position of lunch box in the prior art is solved, and the ability to strictly detect and improve the design of lunch box sealing is achieved.
Patent Information
- Application Number
- CN202411258000.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2024-12-10
AI Technical Summary
The existing lunch box sealing detection methods cannot accurately measure the size and position of the gap. Especially for lunch boxes with complex structures or special shapes, it is difficult to determine the specific location and reason for the lax sealing, which affects product design and production process.
A lunch box detection device was designed to immerse the lunch box in water through a water tank and an electric telescopic rod. The water weight changes are measured using intelligent sensors, combined with up and down vibration and flip components, accurately judge the gap size and position, and eliminate it through the clamping component. The effect of the cover plate not being tightened.
It has achieved stricter inspection of the sealing of the lunch box, which can accurately judge the size and position of the gap, help improve product design and production process, and eliminate the sealing problems caused by the cover plate being not tightly covered.
Smart Images
Figure CN119104225A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of lunch box processing, and in particular to a detection device for lunch box processing. Background Art
[0002] Paper food lunch boxes are widely used in daily life. PLA (polylactic acid) is a biodegradable material commonly used in the field of food packaging. PLA coated paper improves the physical and chemical properties of paper by coating PLA material on the surface of paper, making it more suitable for food packaging, especially in application scenarios that require good sealing. PLA material itself has certain gas barrier properties, but its barrier properties to oxygen and carbon dioxide are relatively weak. This property is particularly important for packaging that needs to keep food fresh for a long time. By improving the processing technology and material formulation of PLA, its barrier properties can be further improved, thereby enhancing the sealing of lunch boxes; improving the physical and chemical properties of PLA coated paper can also effectively improve the sealing of lunch boxes, better protect food and extend its shelf life. PLA coated paper technology is not only widely used in the lunch box industry, but is also closely related to the sealing detection of lunch boxes.
[0003] Among the existing methods for detecting the sealing of lunch boxes, the water immersion method is indeed widely used. Soaking the entire lunch box in water and observing whether bubbles emerge is a relatively intuitive and simple preliminary detection method. However, this method has obvious limitations. First, it can only give a general "yes" or "no" result, that is, whether the lunch box is not tightly sealed. For those lunch boxes with complex structures, such as those with multi-layer sealing structures or special shapes, even if bubbles are detected, it is difficult to accurately indicate the specific location of the poor seal. Secondly, the water immersion method cannot accurately measure the size and length of the gap. The generation of bubbles may only indicate the existence of a leak, but how big and how long the gap at the leak is cannot be judged by this method. Due to the strict requirements on the sealing of the lunch box, this method cannot accurately grasp the specific situation of the poor seal, which is not convenient for improving product design and production technology. Therefore, it is necessary to design a detection equipment for lunch box processing to solve the above problems. Summary of the invention
[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and a lunch box processing detection equipment is proposed. The equipment puts the lunch box into water and then lifts it up, and can judge the size of the gap in the lunch box by testing the weight of the water in the lunch box. When the lunch box moves up, the residual water on the surface of the lunch box can be reduced by shaking, so that the detection result is more accurate. At the same time, by turning the lunch box over and rotating it, it is convenient for the staff to know which lunch box is not sealed tightly, which is convenient for improving the process. At the same time, the influence of the lunch box cover not being closed tightly can be eliminated during the detection.
[0005] In order to achieve the above object, the present invention adopts the following technical solutions:
[0006] A detection device for processing lunch boxes, comprising a water tank, wherein the upper end of the water tank is fixedly connected to a support frame, the inner top of the support frame is fixedly connected to two electric telescopic rods, the telescopic ends of the two electric telescopic rods are commonly fixedly connected to a vertical box, an up and down vibration component is arranged in the vertical box, a moving plate is slidably connected in the vertical box, a flip component is arranged at the lower end of the moving plate, the flip component comprises two fixed rods arranged at the lower end of the moving plate, the lower ends of the two fixed rods are commonly fixedly connected to a fixed block, and the adjacent sides of the two fixed blocks are commonly rotatably connected to a second rotating rod Two connecting blocks are fixedly connected to the second rotating rod, and a disc is fixedly connected to the lower ends of the two connecting blocks. A rectangular plate is provided at the lower end of the disc, and a clamping assembly is provided at the lower end of the rectangular plate. A second gear is provided on the second rotating rod, and a control box is fixedly connected to the left side of the vertical box, and a first electromagnet is provided at the inner top of the control box. A lifting plate is slidably connected to the control box, and the lifting plate is elastically connected to the adjacent side of the first electromagnet through a second spring. A second rack is fixedly connected to the lower end of the lifting plate, and the second rack is meshed with the second gear.
[0007] Preferably, the up and down vibration assembly includes a first rotating rod arranged in the vertical box, a cam is fixedly connected to the first rotating rod, the upper end of the movable plate is elastically connected to the inner top of the vertical box through a first spring, the rear side of the first rotating rod extends to the outside and is fixedly connected to a first gear, and the inner top of the support frame is fixedly connected to a first rack.
[0008] Preferably, the upper end of the water tank is fixedly connected to two fixing seats, both of which are L-shaped, and the adjacent sides of the two fixing seats are commonly fixedly connected to two pneumatic rods, and the telescopic ends of the two matching pneumatic rods are commonly fixedly connected to a cover plate.
[0009] Preferably, a driving motor is installed on the disc, the output shaft end of the driving motor passes through the disc and is fixedly connected to a third gear, the lower end of the disc is fixedly connected to a cylinder, and the cylinder is provided with a fourth gear meshing with the third gear.
[0010] Preferably, a rectangular groove is provided at the lower end of the cylinder, a connecting column is slidably connected in the rectangular groove, the lower end of the connecting column is fixedly connected to the upper end of the rectangular plate, the upper end of the connecting column is elastically connected to the inner top of the rectangular groove through a third spring, the lower end of the disc is fixedly connected to a push rod, and the upper end of the rectangular plate is fixedly connected to an arc block.
[0011] Preferably, the clamping assembly includes a cross groove arranged at the lower end of the rectangular plate, the front and rear inner walls of the cross groove are rotatably connected to a bidirectional threaded rod, the left and right inner walls of the cross groove are rotatably connected to a screw rod, the rear side of the bidirectional threaded rod extends to the outside and is fixedly connected to a turning handle, bevel gears are provided on the bidirectional threaded rod and the two screw rods, sliders are threadedly connected to the bidirectional threaded rod and the two screw rods, the lower end of each slider is fixedly connected to a vertical rod, and the lower end of each vertical rod is fixedly connected to a shovel block.
[0012] Preferably, a first intelligent sensor is provided at the upper end of each shovel block, and a display is provided at the rear side of the water tank.
[0013] Preferably, a pressure rod is fixedly connected to the inner top of the vertical box, and a second intelligent sensor is fixedly connected to the inner top of the support frame.
[0014] Preferably, it also includes a clamping assembly, which includes a rectangular frame arranged at the lower end of the rectangular plate, a roundabout groove is provided at the lower end of the rectangular frame, a second electromagnet is provided at the inner top of the roundabout groove, a clamping block is slidably connected in the roundabout groove, and the clamping block is elastically connected to the adjacent side of the second electromagnet through a third spring.
[0015] Preferably, a controller and a power supply are provided on the rear side of the water tank, and the power supply, the controller and the second electromagnet form a loop through a wire.
[0016] The present invention has the following beneficial effects:
[0017] 1. Compared with the prior art, by setting a plurality of first intelligent sensors, after the lunch box is clamped, the lunch box is first immersed in water, and then the lunch box is lifted up, and according to the weight difference of the lunch box, it is possible to judge whether the lunch box is not tightly sealed, and the size of the gap of the loose seal can be judged;
[0018] 2. Compared with the prior art, the first gear and the first rack are arranged so that when the lunch box moves upward, the rectangular plate drives the lunch box to be in a shaking state, thereby shaking off some excess water on the surface of the lunch box, so that the weight of the lunch box can be more accurate when weighing;
[0019] 3. Compared with the prior art, the flip assembly and the drive motor are set so that after the lunch box is lifted, the lunch box and the disc will rotate 90 degrees, and then the operation of the drive motor will drive the lunch box to rotate. According to the direction of water flowing out of the lunch box, it is determined which side of the lunch box is not sealed tightly, so as to facilitate the adjustment of the subsequent design and production process;
[0020] 4. Compared with the prior art, the arrangement of the top rod and the arc block allows the lunch box to be in a state of shaking left and right during the vertical rotation of the lunch box, so that the water in the lunch box can quickly flow out from the gap, making it easier for staff to make judgments;
[0021] 5. Compared with the prior art, by setting up the clamping assembly, when the lunch box is not sealed tightly after being immersed in water, the clamping assembly will operate to press the lunch box cover tightly, so that in the subsequent detection process, it can be determined whether the lunch box has poor sealing because the lunch box is not tightly covered.
[0022] In summary, the present invention can, to a certain extent, conduct more stringent testing on the sealing of the lunch box. It can not only detect the size of the gap on the lunch box, but also detect on which side the poor sealing of the lunch box is located, thereby facilitating subsequent adjustments to the design and production process of the product. At the same time, it can determine whether the water seepage is caused by the lunch box cover not being tightly closed. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the structure of a lunch box processing detection device proposed by the present invention;
[0024] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective;
[0025] Figure 3 for Figure 1 A partial enlarged view of
[0026] Figure 4 is a schematic diagram of the structure of the clamping assembly;
[0027] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;
[0028] Figure 6 It is a half-section view of the rotating drum;
[0029] Figure 7 A half-section view of the clamping assembly.
[0030] In the figure: 1 water tank, 2 fixed seat, 3 pneumatic rod, 4 cover plate, 5 support frame, 6 electric telescopic rod, 7 rectangular plate, 8 vertical rod, 9 shovel block, 10 vertical box, 11 cam, 12 moving plate, 13 first rotating rod, 14 first gear, 15 control box, 16 fixed rod, 17 first spring, 18 fixed block, 19 connecting block, 20 second rotating rod, 21 disk, 22 connecting column, 23 second gear, 24 second rack, 25 lifting plate, 26 first electromagnet, 27 second spring, 28 pressure rod, 29 first rack, 30 driving motor, 31 third gear, 32 turning handle, 33 cross slot, 34 two-way threaded rod, 35 screw rod, 36 bevel gear, 37 slider, 38 rectangular frame, 39 second electromagnet, 40 pressing block, 41 cylinder, 42 third spring, 43 fourth gear. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0032] Reference Figure 1-Figure 7 A detection device for lunch box processing includes a water tank 1, the upper end of the water tank 1 is fixedly connected to a support frame 5, the inner top of the support frame 5 is fixedly connected to two electric telescopic rods 6, the telescopic ends of the two electric telescopic rods 6 are commonly fixedly connected to a vertical box 10, an up and down vibration component is arranged in the vertical box 10, a moving plate 12 is slidably connected in the vertical box 10, a flip component is arranged at the lower end of the moving plate 12, the flip component includes two fixed rods 16 arranged at the lower end of the moving plate 12, the lower ends of the two fixed rods 16 are commonly fixedly connected to a fixed block 18, the adjacent sides of the two fixed blocks 18 are commonly rotatably connected to a second rotating rod 20, two connecting blocks 19 are fixedly connected to the second rotating rod 20, and the two connecting blocks 19 are The lower ends are fixedly connected with a disc 21, a rectangular plate 7 is provided at the lower end of the disc 21, a clamping assembly is provided at the lower end of the rectangular plate 7, a second gear 23 is provided on the second rotating rod 20, a control box 15 is fixedly connected to the left side of the vertical box 10, a first electromagnet 26 is provided at the inner top of the control box 15, a lifting plate 25 is slidably connected inside the control box 15, the lifting plate 25 is made of magnetic metal material, the first electromagnet 26 generates a repulsive force on the lifting plate 25 after passing through the band, so that the lifting plate 25 moves downward, the lifting plate 25 is elastically connected to the adjacent side of the first electromagnet 26 by a second spring 27, and a second rack 24 is fixedly connected to the lower end of the lifting plate 25, and the second rack 24 is meshed with the second gear 23.
[0033] Among them, the up and down vibration assembly includes a first rotating rod 13 arranged in the vertical box 10, and the cam 11 is fixedly connected to the first rotating rod 13. The upper end of the movable plate 12 is elastically connected to the inner top of the vertical box 10 through a first spring 17. The rear side of the first rotating rod 13 extends to the outside and is fixedly connected to the first gear 14. The inner top of the support frame 5 is fixedly connected to the first rack 29.
[0034] Among them, the upper end of the water tank 1 is fixedly connected to two fixing seats 2, both of which are L-shaped, and the adjacent sides of the two fixing seats 2 are commonly fixedly connected to two pneumatic rods 3, and the telescopic ends of the two matching pneumatic rods 3 are commonly fixedly connected to a cover plate 4.
[0035] Among them, a driving motor 30 is installed on the disc 21, and the end of the output shaft of the driving motor 30 passes through the disc 21 and is fixedly connected to the third gear 31. The lower end of the disc 21 is fixedly connected to a cylinder 41, and the cylinder 41 is provided with a fourth gear 43 meshing with the third gear 31. The lower end of the cylinder 41 is provided with a rectangular groove, and a connecting column 22 is slidably connected in the rectangular groove. The lower end of the connecting column 22 is fixedly connected to the upper end of the rectangular plate 7, and the upper end of the connecting column 22 is elastically connected to the inner top of the rectangular groove through a third spring 42. The lower end of the disc 21 is fixedly connected to a push rod, and the upper end of the rectangular plate 7 is fixedly connected to an arc block.
[0036] The clamping assembly includes a cross groove 33 provided at the lower end of the rectangular plate 7, and the inner walls on the front and rear sides of the cross groove 33 are rotatably connected with a bidirectional threaded rod 34, and the inner walls on the left and right sides of the cross groove 33 are rotatably connected with a screw rod 35, the screw rod 35 is a unidirectional threaded rod, and the thread density on the bidirectional threaded rod 34 is greater than the thread density on the screw rod 35, the rear side of the bidirectional threaded rod 34 extends to the outside and is fixedly connected with a turning handle 32, the bidirectional threaded rod 34 and the two screw rods 35 are provided with a bevel gear 36, the bidirectional threaded rod 34 and the two screw rods 35 are threadedly connected with a slider 37, the lower end of each slider 37 is fixedly connected with a vertical rod 8, the lower end of each vertical rod 8 is fixedly connected with a shovel block 9, and the upper end of each shovel block 9 is provided with a first intelligent sensor, which is a pressure sensor. A display is provided on the rear side of the water tank 1, and multiple first intelligent sensors will detect the weight of the lunch box once before it is immersed in water, and multiple first intelligent sensors will detect the weight again after it is immersed in water, and the signals of the two detections will be processed by the controller and the weight difference will be displayed on the display.
[0037] Among them, the inner top of the vertical box 10 is fixedly connected with a pressure rod 28, and the inner top of the support frame 5 is fixedly connected with a second intelligent sensor, which is also a pressure sensor, and also includes a clamping component, which includes a rectangular frame 38 arranged at the lower end of the rectangular plate 7, and a roundabout groove is provided at the lower end of the rectangular frame 38, and a second electromagnet 39 is provided at the inner top of the roundabout groove. A clamping block 40 is slidably connected in the roundabout groove, and the clamping block 40 is made of magnetic material. When the second electromagnet 39 is energized, a repulsive force is exerted on the clamping block 40, and the adjacent sides of the clamping block 40 and the second electromagnet 39 are elastically connected by a third spring 42. A controller and a power supply are provided on the rear side of the water tank 1. The power supply, the controller and the second electromagnet 39 form a loop through wires. The second intelligent sensor generates an electrical signal and transmits it to the controller, and the controller controls the second electromagnet 39 to be energized.
[0038] The functional principle of the present invention can be explained through the following operation mode: when testing the lunch box, the lunch box is placed on the two cover plates 4, and then the two electric telescopic rods 6 are started, so that the clamping assembly moves downward, and then the lower end of the shovel block 9 contacts the upper end of the cover plate 4. At this time, the staff can rotate the handle 32, so that the multiple vertical rods 8 drive the shovel block 9 to move in the direction close to the lunch box, so that the lunch box is located above the multiple shovel blocks 9, and the multiple vertical rods 8 contact the side of the lunch box, so as to clamp the lunch box;
[0039] After the lunch box is clamped, the multiple pneumatic rods 3 are controlled to extend and retract, so that the two cover plates 4 move back to back, and the top of the water tank 1 is opened. Then the two electric telescopic rods 6 are controlled to continue to extend, so that the clamping assembly drives the lunch box to move down, so that the lunch box is immersed in water. After a period of time, the electric telescopic rods 6 are controlled to retract, so that the lunch box is lifted out of the water.
[0040] As the electric telescopic rod 6 contracts, the vertical box 10 is pulled upward to lift the lunch box, so that the vertical box 10 drives the first rotating rod 13 and the first gear 14 to move upward. When the first gear 14 is meshed with the first rack 29, the first gear 14 drives the first rotating rod 13 to rotate, thereby driving the cam 11 to rotate. Under the elastic action of the two first springs 17, the movable plate 12 and the cam 11 are always in a tightly abutted state. Therefore, during the rotation of the cam 11, the movable plate 12 will continuously move up and down, so that the rectangular plate 7 drives the lunch box to shake up and down, thereby removing moisture from the surface of the lunch box.
[0041] When the vertical box 10 is reset, the weight of the lunch box will be weighed by the four first intelligent sensors, and after being processed by the controller, the difference between the weight of the lunch box before immersion and the weight of the lunch box after immersion will be displayed on the display, so that the staff can judge whether the lunch box is not tightly sealed according to the difference in the display readings, and can also know the approximate size of the gap generated at the seal;
[0042] When the vertical box 10 moves up and resets, the pressing rod 28 will squeeze the second intelligent sensor, so that the second electromagnet 39 is energized. After the second electromagnet 39 is energized, a repulsive force is exerted on the pressing block 40, so that the pressing block 40 moves down and presses the lid of the lunch box;
[0043] The staff can control the first electromagnet 26 to be energized, so that the first electromagnet 26 produces a repulsive force on the lifting plate 25, so that the lifting plate 25 drives the second rack 24 to move downward, so that the disc 21 drives the rectangular plate 7 and the lunch box to rotate counterclockwise by 90 degrees. When the rotation is completed, the controller will control the drive motor 30 to operate, and the third gear 31 and the fourth gear 43 are engaged, so that the lunch box rotates, so that it can be determined which side of the lunch box is not sealed tightly, and then the subsequent production process and design can be modified;
[0044] When the lunch box rotates, when the top rod and the arc block come into contact, the rectangular plate 7 drives the lunch box to move rightward. When the top rod and the arc block separate, the lunch box moves leftward under the elastic action of the third spring 42, so that the lunch box is in a state of shaking left and right, and the water in the lunch box shakes, so that the water in the lunch box can quickly flow out through the gap.
[0045] When the four sides of the lunch box are watertight when it is rotated, it means that the lid of the lunch box is tightly closed, indicating that the sealing of the lunch box is in a qualified state.
[0046] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A lunch box processing detection device, comprising a water tank (1), characterized in that: The upper end of the water tank (1) is fixedly connected to a support frame (5), the inner top of the support frame (5) is fixedly connected to two electric telescopic rods (6), the telescopic ends of the two electric telescopic rods (6) are commonly fixedly connected to a vertical box (10), an up and down vibration assembly is arranged in the vertical box (10), a moving plate (12) is slidably connected in the vertical box (10), a flip assembly is arranged at the lower end of the moving plate (12), the flip assembly comprises two fixed rods (16) arranged at the lower end of the moving plate (12), the lower ends of the two fixed rods (16) are commonly fixedly connected to a fixed block (18), the adjacent sides of the two fixed blocks (18) are commonly rotatably connected to a second rotating rod (20), and the second rotating rod (20) is fixedly connected to two connecting blocks (19), the lower ends of the two connecting blocks (19) are commonly fixedly connected with a disk (21), the lower end of the disk (21) is provided with a rectangular plate (7), the lower end of the rectangular plate (7) is provided with a clamping assembly, the second rotating rod (20) is provided with a second gear (23), the left side of the vertical box (10) is fixedly connected with a control box (15), the inner top of the control box (15) is provided with a first electromagnet (26), the control box (15) is slidably connected with a lifting plate (25), the lifting plate (25) and the adjacent side of the first electromagnet (26) are elastically connected by a second spring (27), the lower end of the lifting plate (25) is fixedly connected with a second rack (24), and the second rack (24) is meshed with the second gear (23).
2. A lunch box processing detection device according to claim 1, characterized in that: The up-and-down vibration assembly comprises a first rotating rod (13) arranged in a vertical box (10), a cam (11) being fixedly connected to the first rotating rod (13), an upper end of the movable plate (12) being elastically connected to an inner top of the vertical box (10) via a first spring (17), a rear side of the first rotating rod (13) extending to the outside and being fixedly connected to a first gear (14), and a first rack (29) being fixedly connected to an inner top of the support frame (5).
3. The lunch box processing detection device according to claim 1, characterized in that: The upper end of the water tank (1) is fixedly connected to two fixing seats (2), both of which are L-shaped, and adjacent sides of the two fixing seats (2) are commonly fixedly connected to two pneumatic rods (3), and the telescopic ends of the two matching pneumatic rods (3) are commonly fixedly connected to a cover plate (4).
4. The lunch box processing detection device according to claim 1, characterized in that: A driving motor (30) is mounted on the disc (21); the output shaft end of the driving motor (30) passes through the disc (21) and is fixedly connected to a third gear (31); a cylinder (41) is fixedly connected to the lower end of the disc (21); and a fourth gear (43) meshing with the third gear (31) is provided on the cylinder (41).
5. The lunch box processing detection device according to claim 1, characterized in that: A rectangular groove is provided at the lower end of the cylinder (41), a connecting column (22) is slidably connected in the rectangular groove, the lower end of the connecting column (22) is fixedly connected to the upper end of the rectangular plate (7), the upper end of the connecting column (22) is elastically connected to the inner top of the rectangular groove via a third spring (42), the lower end of the disc (21) is fixedly connected to a push rod, and the upper end of the rectangular plate (7) is fixedly connected to an arc block.
6. The lunch box processing detection device according to claim 1, characterized in that: The clamping assembly comprises a cross groove (33) provided at the lower end of the rectangular plate (7); the inner walls on both the front and rear sides of the cross groove (33) are rotatably connected to a bidirectional threaded rod (34); the inner walls on both the left and right sides of the cross groove (33) are rotatably connected to screw rods (35); the rear side of the bidirectional threaded rod (34) extends to the outside and is fixedly connected to a turning handle (32); the bidirectional threaded rod (34) and the two screw rods (35) are both provided with a bevel gear (36); the bidirectional threaded rod (34) and the two screw rods (35) are both threadably connected to a slider (37); the lower end of each slider (37) is fixedly connected to a vertical rod (8); and the lower end of each vertical rod (8) is fixedly connected to a shovel block (9).
7. A lunch box processing detection device according to claim 6, characterized in that: A first intelligent sensor is provided at the upper end of each shovel block (9), and a display is provided at the rear side of the water tank (1).
8. The lunch box processing detection device according to claim 1, characterized in that: A pressure rod (28) is fixedly connected to the inner top of the vertical box (10), and a second intelligent sensor is fixedly connected to the inner top of the support frame (5).
9. The lunch box processing detection device according to claim 1, characterized in that: The invention also includes a clamping assembly, which includes a rectangular frame (38) arranged at the lower end of the rectangular plate (7), a circular groove is provided at the lower end of the rectangular frame (38), a second electromagnet (39) is provided at the inner top of the circular groove, a clamping block (40) is slidably connected in the circular groove, and the adjacent side of the clamping block (40) and the second electromagnet (39) are elastically connected via a third spring (42).
10. The lunch box processing detection equipment according to claim 1, characterized in that: A controller and a power supply are provided on the rear side of the water tank (1), and the power supply, the controller and the second electromagnet (39) form a loop via a wire.