Automatic control method and system for fruit ripening

Abstract

The present invention relates to the field of mango ripening technology, and more particularly to an automatic control method and system for fruit ripening. To address the issues of uneven ripening and uneven appearance of mangoes in existing mango ripening devices, a solution is proposed. The solution includes a warehouse, an air circulation mechanism, an oxygen and ethylene replenishment assembly, and multiple storage mechanisms installed within the warehouse. The air circulation mechanism communicates with the interior of the warehouse for monitoring and replacing the air inside the warehouse. The air circulation mechanism also communicates with the oxygen and ethylene replenishment assembly for replenishing oxygen and ethylene during the circulation of air within the warehouse. The present invention ensures sufficient and uniform contact between the mangoes and the ethylene, effectively ensuring uniform ripeness and uniform appearance of the mangoes.

Description

Technical Field

[0001] The present invention relates to the field of mango ripening, and in particular to an automatic control method and system for fruit ripening. Background Art

[0002] Existing mango ripening methods mainly involve spraying ripening agents and then naturally ripening at a higher temperature, or spraying ripening agents and then placing them in a cold storage for constant temperature ripening.

[0003] Natural ripening relies on manual temperature control, which is difficult to control. Furthermore, insufficient oxygen and excessive carbon dioxide can lead to uncontrolled fructose conversion during the ripening process. Due to individual mango maturity differences, mangoes can easily become overripe or underripe, resulting in a low yield.

[0004] Constant temperature ripening in the cold storage is achieved through refrigeration of the cold storage, but the humidity cannot be effectively controlled. Excessive circulating wind force from the cold storage fan will cause wrinkles on the fruit skin. The key factors for ripening control, such as oxygen concentration, carbon dioxide concentration, and ethylene concentration, are not tested and controlled. Although the yield of this ripening method is higher than that of natural ripening, it is still relatively low.

[0005] Existing ripening applications all have the problem of being unable to precisely control the ripening process, and the maturity of mangoes is judged entirely by manual experience. Insufficient ventilation can cause local overheating of mangoes, resulting in rapid ripening and rot before most other fruits are ripe; excessive circulating air can cause wrinkles on the peel, affecting the appearance; excessive humidity can cause spots on mangoes; and too low humidity can cause mangoes to lose water and become shriveled. Too low oxygen concentration and too high carbon dioxide concentration can inhibit the respiration of mangoes and affect fructose conversion, easily leading to uneven sugar content in the same batch of ripened products. Moreover, since mangoes are not manually turned over during the ripening process, the ripeness of the front and back of the mangoes is different. Therefore, this scheme proposes an automatic control method and system for fruit ripening. Summary of the Invention

[0006] The present invention provides an automatic control method and system for fruit ripening, which solves the problem of uneven ripeness and uneven appearance of mangoes ripened by mango ripening devices in the prior art.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An automatic control method and system for ripening fruits includes a warehouse, an air circulation mechanism, an oxygen and ethylene replenishment assembly, and multiple storage mechanisms installed inside the warehouse. The air circulation mechanism is connected to the interior of the warehouse for detecting and replacing the air inside the warehouse. The air circulation mechanism is also connected to the oxygen and ethylene replenishment assembly for replenishing oxygen and ethylene when circulating the air inside the warehouse. An air composition detection mechanism is also installed inside the warehouse. A main pipe connected to the air circulation mechanism is installed at the bottom of the warehouse.

[0009] The storage mechanism includes a hollow base installed at the bottom of the warehouse, a hollow fixed shaft rotatably connected to the top of the base, a plurality of placement plates sleeved on the outside of the fixed shaft, an air dispersion assembly installed above the placement plates, and a material lifting assembly installed at the bottom of the placement plates. The base is connected to the main pipe through a branch pipe. The placement plates are rotatably connected to the fixed shaft. A fixing frame is installed on the base, and a motor for driving the fixed shaft to rotate and a locking member for locking the placement plates are installed on the fixing frame.

[0010] The wind dissipation assembly includes a fixed plate fixed to the outer periphery of the fixed shaft, a fan installed on the top of the fixed plate, and a transmission member for driving the fan to rotate when the fixed shaft rotates. The fixed plate is a hollow structure and is connected to the interior of the fixed shaft. The bottom surface of the fixed plate is provided with a plurality of air outlet holes.

[0011] The lifting assembly includes multiple bottom rings installed at the bottom of the placement plate, multiple lifting columns fixed to the bottom surface of the bottom rings, and a linkage installed at the bottom of the placement plate for driving the bottom rings to rise and fall while the fixed shaft rotates. The tops of the multiple lifting columns all extend to the inside of the placement plate.

[0012] Through the above technical solution, it is possible to ensure that mangoes are in full and uniform contact with ethylene, effectively ensuring the uniformity of mango ripeness and appearance.

[0013] As a further improvement of the above scheme, the air circulation mechanism includes a return air duct installed outside the warehouse, a connecting pipe installed at the outlet end of the return air duct, fans 1 and 2 installed in the return air duct, and fan 3 installed on the outer wall of the warehouse. The inlet end of the return air duct is connected to the interior of the warehouse, and the interior of the return air duct is sequentially installed with a filter, a refrigeration unit and an electric heater from far to near the connecting pipe. Fan 2 is located at the connection between the connecting pipe and the return air duct, so as to draw the air in the return air duct into the interior of the connecting pipe. The filter, the refrigeration unit and the electric heater are located between fans 1 and 2, and fan 1 is used to draw the air in the warehouse to the outside of the warehouse. An oxygen concentration sensor 1, an ethylene concentration sensor 1, a carbon dioxide concentration sensor 1 and an air temperature and humidity sensor 1 are also installed on the inner wall of the return air duct near the inlet end. Fan 3 is used to introduce outside air into the interior of the warehouse, and the other end of the connecting pipe is connected to the main pipe.

[0014] Through the above technical solution, the hot air heated inside the warehouse can be sucked in through the return air duct and then cooled. The cooled cold air is then transported back to the warehouse through the connecting pipe, thus forming a closed loop.

[0015] As a further improvement of the above scheme, the oxygen and ethylene replenishment assembly includes an oxygen storage tank and an ethylene storage tank installed outside the warehouse, and a feed pipe installed on the connecting pipe. One end of the feed pipe extends into the connecting pipe and is installed with a nozzle. A discharge pipe 1 is installed on the oxygen storage tank, and a solenoid valve 1 is installed on the discharge pipe 1. A discharge pipe 2 is installed on the ethylene storage tank, and a solenoid valve 2 is installed on the discharge pipe 2. The other end of the feed pipe is connected to the discharge pipe 1 and the discharge pipe 2 through a tee.

[0016] Through the above technical solution, ethylene and oxygen in the warehouse can be replenished in time.

[0017] As a further improvement of the above solution, the air composition detection mechanism includes two carbon dioxide sensors 2, two air temperature and humidity sensors 2 and an ethylene concentration sensor installed inside the warehouse.

[0018] Through the above technical solution, the ethylene concentration, oxygen concentration, carbon dioxide concentration, and air temperature and humidity in the warehouse air can be monitored in real time.

[0019] As a further improvement of the above solution, the bottom surface of the fixed plate is rotatably connected to a rotating shaft, fan one is installed on the rotating shaft, the top of the rotating shaft extends above the fixed plate and is installed with fan two, the transmission member includes a transmission gear sleeved on the outside of the rotating shaft, a connecting gear rotatably connected to the top of the fixed plate and a fixed gear sleeved on the outside of the fixed shaft, a fixing rod fixed to the fixed frame is fixed on the top surface of the fixed gear, and the connecting gear is engaged with the transmission gear and the fixed gear at the same time.

[0020] Through the above technical solution, the first fan and the second fan can be driven to rotate simultaneously while the fixed shaft rotates, thereby ensuring that the ethylene can be in uniform contact with the mango.

[0021] As a further improvement of the above scheme, the linkage part includes multiple camshafts rotatably connected to the bottom of the placement plate and a gear ring sleeved on the outside of the fixed shaft. One end of the camshaft's shaft body is fixed with a linkage gear meshing with the bottom surface of the gear ring. Multiple bottom rings are coaxially arranged with the fixed shaft, and the diameters of the multiple bottom rings decrease from outside to inside. A spring is sleeved on the outside of the ejecting column, the bottom of the spring is fixed to the top surface of the bottom ring, and the top of the spring is fixed to the bottom surface of the receiving plate. The number of cams on the camshaft is the same as the number of bottom rings, and the protruding ends of the two adjacent cams on the camshaft are opposite. The bottom surface of the bottom ring is fixed with an abutment column corresponding to the cam on the camshaft, and the bottom of the abutment column abuts against the outer ring of the cam.

[0022] By adopting the above technical solution, the mangoes in the placement tray can be continuously moved while the fixed shaft rotates, thereby preventing a fixed area on the bottom surface of the mangoes from being unable to contact the ethylene.

[0023] As a further improvement of the above solution, the locking member includes a fixed block fixed on the fixed frame and a locking bolt screwed to the top surface of the fixed block. The outer periphery of the placement plate is fixed with a side plate, and the top surface of the side plate is provided with a card hole that matches the locking bolt.

[0024] Through the above technical solution, the placement tray can be locked during ripening, and the locking piece can be opened when taking mangoes, so that the placement tray can be rotated, which is convenient for loading and unloading.

[0025] As a further improvement of the above solution, a hollow interlayer is provided inside the side wall of the placement tray, and a plurality of through holes communicating with the hollow interlayer are opened at the bottom of the side wall of the placement tray. A suction mechanism for transporting external air into the hollow interlayer is installed on the outer periphery of the placement tray.

[0026] Through the above technical solution, the entry of ethylene into the inner bottom of the placement tray can be further enhanced, ensuring that the mangoes can be in full contact with ethylene.

[0027] As a further improvement of the above scheme, the suction mechanism includes a piston cylinder fixed on the outer wall of the placement plate, a rotary wheel fixed on the other end of the camshaft shaft body and a connecting rod rotatably connected to a circular surface deviating from the center of the circle on one side of the rotary wheel. The bottom of the piston cylinder is provided with an opening, a piston plate is installed inside the piston cylinder, the other end of the connecting rod extends into the piston cylinder and is hinged to the bottom surface of the piston plate, and the top surface of the piston cylinder is provided with an air inlet pipe and an air outlet pipe connected to the hollow interlayer inside the side wall of the placement plate, and a one-way valve is installed on both the air outlet pipe and the air inlet pipe.

[0028] Through the above technical solution, the air in the storehouse can be sucked into the interior of the placement tray by using the piston cylinder while the fixed shaft rotates.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. Through the oxygen and ethylene replenishment components, the air circulation mechanism can be automatically started when the carbon dioxide gas concentration is high according to the detection data of the air composition detection agency, and the high-concentration carbon dioxide gas air is discharged to replenish fresh air. At the same time, the setting of the air circulation device can inhale the hot air after the temperature rises inside the warehouse through the return air duct, and then cool it. The cold air after cooling is then transported back to the interior of the warehouse through the connecting pipe, thus forming a closed loop and avoiding the waste of ethylene gas and oxygen.

[0031] 2. Through the setting of the storage mechanism, the air containing oxygen and ethylene in the main pipe can be evenly and gently blown onto the surface of the mangoes. Moreover, while the fixed shaft rotates, the mangoes placed in the placement tray can be continuously moved, so that the side of the mango facing the bottom of the placement tray can also be separated from the contact between the mangoes and the bottom of the placement tray and fully contact with the air containing ethylene, thereby ensuring the uniform ripeness of the mangoes.

[0032] 3. By setting up the suction mechanism, air containing ethylene can be sucked into the inner bottom of the placement tray while the fixed shaft rotates, thereby ensuring that the side of the mango in contact with the placement tray can absorb ethylene more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front cross-sectional view of the present invention;

[0034] Figure 2 for Figure 1 Schematic diagram of the storage mechanism;

[0035] Figure 3 for Figure 2 A schematic diagram of the mechanism of the placement tray, suction assembly and flip assembly;

[0036] Figure 4 A bottom view of the placement tray;

[0037] Figure 5 A perspective view of the placement of the tray and the wind dispersion assembly;

[0038] Figure 6 Schematic diagram of the camshaft structure;

[0039] Figure 7 It is a structural diagram of the top material.

[0040] Description of main symbols:

[0041] 1. Warehouse; 2. Return air duct; 3. Fan 1; 4. Filter; 5. Refrigeration unit; 6. Electric heater; 7. Fan 2; 8. Connecting pipe; 9. Nozzle; 10. Fan 3; 11. Feed pipe; 12. Oxygen concentration sensor 1; 13. Ethylene concentration sensor 1; 14. Carbon dioxide concentration sensor 1; 15. Air temperature and humidity sensor 1; 16. Oxygen storage tank; 17. Ethylene storage tank; 18. Main pipe; 19. Branch pipe; 20. Base; 21. Fixing Shaft; 22. Fixed gear; 23. Connecting gear; 24. Transmission gear; 25. Rotating shaft; 26. Fan 1; 27. Fan 2; 28. Fixed plate; 29. ​​Fixed block; 30. Side plate; 31. Placement plate; 32. Ejector column; 33. Bearing; 34. Locking bolt; 35. Camshaft; 36. Interlocking gear; 37. Piston cylinder; 38. Rotor; 39. Bottom ring; 40. Ring gear; 41. Piston plate; 42. Connecting rod; 43. Protective cover; 44. Abutment column. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0043] Example 1:

[0044] Please combine Figure 1-7The present embodiment provides an automatic control method and system for ripening fruits, comprising a warehouse 1, an air circulation mechanism, an oxygen and ethylene replenishment assembly, and a plurality of storage mechanisms installed inside the warehouse 1. The air circulation mechanism is in communication with the interior of the warehouse 1 for detecting and replacing the air inside the warehouse 1. The air circulation mechanism comprises a return air duct 2 installed outside the warehouse 1, a connecting pipe 8 installed at the outlet end of the return air duct 2, a fan 1 3 and a fan 2 7 installed in the return air duct 2, and a fan 3 10 installed on the outer wall of the warehouse 1. The inlet end of the return air duct 2 is in communication with the interior of the warehouse 1. A filter 4, a refrigeration unit 5, and an electric heater 6 are installed in the return air duct 2 in descending order from the distance from the connecting pipe 8. The fan 2 7 is located at the connection between the connecting pipe 8 and the return air duct 2 for drawing air from the return air duct 2 into the interior of the connecting pipe 8. The filter 4, the refrigeration unit 5, and the electric heater 6 are located between the fan 1 3 and the fan 2 7, and the fan 1 3 is used to extract the air in the warehouse 1 to the outside of the warehouse 1. The inner wall of the return air duct 2 near the inlet end is also equipped with an oxygen concentration sensor 12, an ethylene concentration sensor 13, a carbon dioxide concentration sensor 14 and an air temperature and humidity sensor 15. The fan 3 10 is used to introduce external air into the interior of the warehouse 1. The other end of the connecting pipe 8 is connected to the main pipe 18. A water-cooled direct expansion environment simulator is used to automatically adjust the temperature and humidity in the warehouse. The cold air cooled by the fan 2 7 is transported to the warehouse 1 through the connecting pipe 8. After heat exchange in the warehouse, the hot air is sucked into the refrigeration unit through the return air duct 2 to form a closed loop. The setting of the oxygen concentration sensor 12, the ethylene concentration sensor 13, the carbon dioxide concentration sensor 14 and the air temperature and humidity sensor 15 can help management personnel effectively make adaptive adjustments to the temperature and humidity, carbon dioxide concentration, oxygen concentration and ethylene concentration in the air.

[0045] The air circulation mechanism is also connected to the oxygen and ethylene replenishment components to replenish oxygen and ethylene when circulating the air inside the warehouse 1. The oxygen and ethylene replenishment components include an oxygen storage tank 16 installed outside the warehouse 1, an ethylene storage tank 17 and a feed pipe 11 installed on the connecting pipe 8. One end of the feed pipe 11 extends into the connecting pipe 8 and is installed with a nozzle 9. A discharge pipe 1 is installed on the oxygen storage tank 16, and a solenoid valve 1 is installed on the discharge pipe 1. A discharge pipe 2 is installed on the ethylene storage tank 17, and a solenoid valve 2 is installed on the discharge pipe 2. The other end of the feed pipe 11 is connected to the discharge pipe 1 and the discharge pipe 2 through a tee. When the oxygen content in the air inside the warehouse 1 is low, the solenoid valve 1 can be opened to allow oxygen to enter the connecting pipe 8 and then follow the circulating air into the warehouse 1. Similarly, when the ethylene content in the air inside the warehouse 1 is low, the solenoid valve 2 can be opened to allow ethylene to enter the connecting pipe 8 and then follow the circulating air into the warehouse 1.

[0046] An air composition detection mechanism is also installed inside the warehouse 1. A main pipe 18 connected to the air circulation mechanism is installed at the bottom inside the warehouse 1. The air composition detection mechanism includes two carbon dioxide sensors 2, two air temperature and humidity sensors 2 and ethylene concentration sensors 2 installed inside the warehouse 1. The two carbon dioxide sensors 2 and the two air temperature and humidity sensors 2 are respectively installed on the inner walls on both sides of the warehouse 1. The air composition detection mechanism can also be used to monitor the temperature, humidity, ethylene concentration and carbon dioxide concentration in the warehouse.

[0047] The storage mechanism includes a hollow base 20 installed at the bottom of the warehouse 1, a hollow fixed shaft 21 rotatably connected to the top of the base 20, a plurality of placement plates 31 sleeved on the outside of the fixed shaft 21, a wind dissipation component installed above the placement plate 31 and a material lifting component installed at the bottom of the placement plate 31, the placement plate 31 and the fixed shaft 21 are rotatably connected through a bearing, the base 20 and the main pipe 18 are connected through a branch pipe 19, the placement plate 31 is rotatably connected to the fixed shaft 21, a fixed frame is installed on the base 20, and a driving mechanism is installed on the fixed frame. The motor for rotating the fixed shaft 21 and the locking member for locking the placement tray 31, the locking member includes a fixed block 29 fixed to the fixed frame and a locking bolt 34 screwed to the top surface of the fixed block 29. The outer periphery of the placement tray 31 is fixed with a side plate 30, and the top surface of the side plate 30 is provided with a card hole that matches the locking bolt 34. When one end of the locking bolt 34 is stuck into the card hole, the placement tray 31 will not rotate with the rotation of the fixed shaft 21. The bottom of the placement tray 31 is also provided with multiple ventilation holes to help ethylene enter the lower inner side of the bottom of the placement tray 31.

[0048] The wind dissipation component includes a fixed plate 28 fixed to the outer periphery of the fixed shaft 21, a fan 26 installed on the top of the fixed plate 28, and a transmission member for driving the fan 26 to rotate when the fixed shaft 21 rotates. The fixed plate 28 is a hollow structure and is connected to the interior of the fixed shaft 21. A plurality of air outlet holes are provided on the bottom surface of the fixed plate 28. The bottom surface of the fixed plate 28 is rotatably connected to the rotating shaft 25. The fan 26 is installed on the rotating shaft 25. The top of the rotating shaft 25 extends to the top of the fixed plate 28 and is installed with a fan 27. The outside of the fan 26 is provided with a protective cover 43 fixed to the bottom of the fixed plate 28. The transmission member includes a transmission gear 24 sleeved on the outside of the rotating shaft 25, a rotation connection The connecting gear 23 on the top of the fixed plate 28 and the fixed gear 22 sleeved on the outside of the fixed shaft 21, the top surface of the fixed gear 22 is fixed with a fixed rod fixed to the fixed frame, the connecting gear 23 is engaged with the transmission gear 24 and the fixed gear 22 at the same time, when the fixed shaft 21 rotates, the fixed plate 28 rotates synchronously with it, so that the connecting gear drives the transmission gear 24 to rotate, and finally the fan 1 26 and the fan 2 27 rotate at the same time as the fixed shaft 21 rotates, so that the fan 1 26 can suck out the air containing ethylene in the fixed shaft 21 and blow it onto the surface of the mango, and the fan 2 27 can also further blow the air in the warehouse 1 to the surface of the mango.

[0049] The lifting assembly includes multiple bottom rings 39 installed at the bottom of the placement plate 2, multiple lifting columns 32 fixed to the bottom surface of the bottom ring 39, and a linkage part installed at the bottom of the placement plate 2 for driving the bottom ring 39 to rise and fall while the fixed shaft 21 rotates. The tops of the multiple lifting columns 32 all extend to the inside of the placement plate 31, and the linkage parts include multiple cam shafts 35 rotatably connected to the bottom of the placement plate 31 and a gear ring 40 sleeved on the outside of the fixed shaft 21. One end of the shaft body of the cam shaft 35 is fixed with a linkage gear 36 that meshes with the bottom surface of the gear ring 40. The multiple bottom rings 39 are coaxially arranged with the fixed shaft 21, and the diameters of the multiple bottom rings 39 decrease from the outside to the inside. A spring is sleeved on the outside of the lifting column 32, the bottom of the spring is fixed to the top surface of the bottom ring 39, the top of the spring is fixed to the bottom surface of the receiving plate 31, and the number of cams on the cam shaft 35 is fixed. The amount is the same as that of the bottom ring 39, and the protruding ends of the two adjacent cams on the camshaft 35 are opposite. The bottom surface of the bottom ring 39 is fixed with an abutment column 44 corresponding to the cam on the camshaft 35, and the bottom of the abutment column 44 abuts against the outer ring of the cam. After the fixed shaft 21 rotates, it drives the gear ring 40 to rotate synchronously. When the placement plate 31 does not rotate, the camshaft starts to rotate. Since the protruding ends of the two adjacent cams on the camshaft are opposite, when the camshaft 35 rotates, the undulation directions of the two adjacent bottom rings 39 are opposite. Therefore, when the camshaft 35 rotates, the top material columns 32 on the two adjacent bottom rings 39 can intermittently contact the bottom surface of the mango, so that the bottom surface of the mango will not be unable to fully contact ethylene due to the fixed area contacting the bottom surface of the receiving plate 31.

[0050] The implementation principle of this embodiment is as follows: when ripening, mangoes are placed in the placement tray 3 in sequence. After the mangoes are placed, the door of the warehouse 1 is closed, and then the solenoid valve 1 and the solenoid valve 2 are opened, and then the fan 2 7 is turned on, so that oxygen and ethylene are input into the interior of the fixed pipe 18. The ethylene and oxygen entering the main pipe 18 then enter the base 20 through each branch pipe respectively, and then the ethylene and oxygen in the base 20 enter the interior of the fixed shaft 21. After the motor in the storage mechanism is started, the fixed shaft 21 starts to rotate. After the fixed shaft 21 rotates, the fixed plate 28 rotates synchronously with it, so that the connecting gear drives the transmission gear 24 to rotate, and finally the fan 1 26 and the fan 2 27 rotate at the same time as the fixed shaft 21 rotates. In this way, the fan 1 26 can suck out the air containing ethylene in the fixed shaft 21 and blow it onto the surface of the mangoes, and the fan 2 27 can further blow the air in the warehouse 1 onto the surface of the mangoes.

[0051] When the fixed shaft 21 rotates, it also drives the ring gear 40 to rotate synchronously. Since the placement plate 31 does not rotate, the rotation of the ring gear 40 drives the linkage gear 26 to rotate, thereby causing the camshaft 35 to start rotating. Since the protruding ends of the two adjacent cams on the camshaft are opposite, when the camshaft 35 rotates, the two adjacent abutment posts 44 are aligned, and the undulation directions of the two adjacent bottom rings 39 are opposite. Therefore, when the camshaft 35 rotates, the pushing posts 32 on the two adjacent bottom rings 39 can intermittently contact the bottom surface of the mango, so that the bottom surface of the mango will not be unable to fully contact ethylene due to the fixed area contacting the bottom surface of the receiving plate 31.

[0052] When the oxygen concentration sensor 2 and the ethylene concentration sensor detect that the oxygen concentration and ethylene concentration in the warehouse 1 have reached the set value, the valve 1 and the valve 2 are closed;

[0053] After starting the fan 2 7, the air in the warehouse 1 can be sucked into the return air duct 2 through the fan 2 7, and then the cold air after refrigeration is transported to the warehouse 1 through the connecting pipe 8. After heat exchange with the mangoes in the warehouse, the hot air is sucked into the refrigeration unit through the return air duct 2 to form a closed loop. The setting of the oxygen concentration sensor 12, the ethylene concentration sensor 13, the carbon dioxide concentration sensor 14 and the air temperature and humidity sensor 15 can help the management personnel to effectively adjust the temperature and humidity, carbon dioxide concentration, oxygen concentration and ethylene concentration in the air.

[0054] When the air in the warehouse 1 needs to be replaced, the fan 13 and the fan 10 can be turned on. The fan 13 draws the air in the warehouse to the outside of the warehouse, and the fan 3 10 draws the fresh air outside the warehouse into the interior of the warehouse 1.

[0055] Example 2:

[0056] Combine Figure 1-3 The present embodiment is further improved on the basis of the embodiment 1 in that: a hollow interlayer is provided inside the side wall of the placing plate 31, and a plurality of through holes communicating with the hollow interlayer are opened at the bottom of the side wall of the placing plate 31. A suction mechanism for conveying external air into the hollow interlayer is installed on the periphery of the placing plate 31. The suction mechanism includes a piston cylinder 37 fixed on the outer wall of the placing plate 31, a runner 38 fixed to the other end of the shaft body of the camshaft 34, and a connecting rod 42 rotatably connected to a circular surface deviated from the center of the circle on one side of the runner 38. The piston cylinder 37 is fixed on the outer wall of the placing plate 31, and the runner 38 is fixed to the other end of the shaft body of the camshaft 34. 7 is provided with an opening at the bottom, and a piston plate 41 is installed inside the piston cylinder 37. The other end of the connecting rod 42 extends into the piston cylinder 37 and is hinged to the bottom surface of the piston plate 41. The top surface of the piston cylinder 37 is provided with an air inlet pipe and an air outlet pipe connected to the hollow interlayer inside the side wall of the placement plate 31, and a one-way valve is installed on the air outlet pipe and the air inlet pipe. The one-way valve on the air outlet pipe allows the air in the piston cylinder 37 to be discharged only through the air outlet pipe, while the one-way valve on the air inlet pipe allows the outside air to enter the piston cylinder 37 only through the air inlet pipe in one direction.

[0057] The working principle of this embodiment is as follows: when the camshaft 35 rotates, it can drive the runner 38 to rotate. After the runner 38 rotates, it can drive the piston plate 41 to move up and down through the connecting rod 42. As a result, when the piston plate 41 descends, it sucks the air in the warehouse 1 into the piston cylinder 37. Then, when the piston plate 41 rises, the air in the piston cylinder 37 is injected into the placement tray 31, thereby ensuring that the bottom surface of the mangoes in the placement tray 31 can fully contact with the ethylene.

[0058] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An automatic control system for ripening fruits, comprising a warehouse, an air circulation mechanism, an oxygen and ethylene supply assembly, and a plurality of storage mechanisms installed inside the warehouse, characterized in that: The air circulation mechanism is connected to the interior of the warehouse for detecting and replacing the air inside the warehouse. The air circulation mechanism is also connected to the oxygen and ethylene replenishment components for replenishing oxygen and ethylene when circulating the air inside the warehouse. An air composition detection mechanism is also installed inside the warehouse. A main pipe connected to the air circulation mechanism is installed at the bottom of the inner side of the warehouse; The storage mechanism includes a hollow base installed at the bottom of the warehouse, a hollow fixed shaft rotatably connected to the top of the base, a plurality of placement plates sleeved on the outside of the fixed shaft, an air dispersion assembly installed above the placement plates, and a material lifting assembly installed at the bottom of the placement plates. The base is connected to the main pipe through a branch pipe. The placement plates are rotatably connected to the fixed shaft. A fixing frame is installed on the base, and a motor for driving the fixed shaft to rotate and a locking member for locking the placement plates are installed on the fixing frame. The wind dissipation assembly includes a fixed plate fixed to the outer periphery of the fixed shaft, a fan installed on the top of the fixed plate, and a transmission member for driving the fan to rotate when the fixed shaft rotates. The fixed plate is a hollow structure and is connected to the interior of the fixed shaft. The bottom surface of the fixed plate is provided with a plurality of air outlet holes. The lifting assembly includes multiple bottom rings installed at the bottom of the placement plate, multiple lifting columns fixed to the bottom surface of the bottom rings, and a linkage installed at the bottom of the placement plate for driving the bottom rings to rise and fall while the fixed shaft rotates. The tops of the multiple lifting columns all extend to the inside of the placement plate.

2. The automatic control system for fruit ripening according to claim 1, characterized in that: The oxygen and ethylene replenishment assembly includes an oxygen storage tank and an ethylene storage tank installed outside the warehouse, and a feed pipe installed on the connecting pipe. One end of the feed pipe extends into the connecting pipe and is installed with a nozzle. A discharge pipe 1 is installed on the oxygen storage tank, and a solenoid valve 1 is installed on the discharge pipe 1. A discharge pipe 2 is installed on the ethylene storage tank, and a solenoid valve 2 is installed on the discharge pipe 2. The other end of the feed pipe is connected to the discharge pipe 1 and the discharge pipe 2 through a tee.

3. The automatic control system for ripening fruits according to claim 1, characterized in that: The air composition detection mechanism includes two carbon dioxide sensors 2, two air temperature and humidity sensors 2 and an ethylene concentration sensor installed inside the warehouse.

4. The automatic control system for ripening fruits according to claim 1, characterized in that: The locking member includes a fixing block fixed on the fixing frame and a locking bolt screwed on the top surface of the fixing block. The outer periphery of the placement tray is fixed with a side plate, and the top surface of the side plate is provided with a card hole that matches the locking bolt.

5. The automatic control system for ripening fruits according to claim 1, characterized in that: A hollow interlayer is provided inside the side wall of the placement tray, and a plurality of through holes communicating with the hollow interlayer are opened at the bottom of the side wall of the placement tray. A suction mechanism for conveying external air into the hollow interlayer is installed on the periphery of the placement tray.

6. The automatic control system for ripening fruits according to claim 5, characterized in that: The suction mechanism includes a piston cylinder fixed on the outer wall of the placement plate, a rotating wheel fixed on the other end of the camshaft shaft body, and a connecting rod rotatably connected to a circular surface deviated from the center of the circle on one side of the rotating wheel. The bottom of the piston cylinder is provided with an opening, a piston plate is installed inside the piston cylinder, the other end of the connecting rod extends into the piston cylinder and is hinged to the bottom surface of the piston plate, the top surface of the piston cylinder is provided with an air inlet pipe and an air outlet pipe connected to the hollow interlayer inside the side wall of the placement plate, and a one-way valve is installed on both the air outlet pipe and the air inlet pipe.

7. The automatic control system for ripening fruits according to claim 1, characterized in that: The bottom surface of the fixed plate is rotatably connected to a rotating shaft, and the first fan is mounted on the rotating shaft. The top of the rotating shaft extends above the fixed plate and is mounted with the second fan. The transmission member includes a transmission gear sleeved on the outside of the rotating shaft, a connecting gear rotatably connected to the top of the fixed plate, and a fixed gear sleeved on the outside of the fixed shaft. A fixing rod fixed to the fixing frame is fixed on the top surface of the fixed gear. The connecting gear is engaged with the transmission gear and the fixed gear at the same time. The linkage part includes multiple camshafts rotatably connected to the bottom of the placement plate and a gear ring sleeved on the outside of the fixed shaft. One end of the camshaft's shaft body is fixed with a linkage gear meshing with the bottom surface of the gear ring. Multiple bottom rings are coaxially arranged with the fixed shaft, and the diameters of the multiple bottom rings decrease from outside to inside. A spring is sleeved on the outside of the ejecting column, the bottom of the spring is fixed to the top surface of the bottom ring, and the top of the spring is fixed to the bottom surface of the receiving plate. The number of cams on the camshaft is the same as the number of bottom rings, and the protruding ends of the two adjacent cams on the camshaft are opposite. The bottom surface of the bottom ring is fixed with an abutment column corresponding to the cam on the camshaft, and the bottom of the abutment column abuts against the outer ring of the cam.

8. The automatic control system for ripening fruits according to claim 1, characterized in that: The air circulation mechanism includes a return air duct installed outside the warehouse, a connecting pipe installed at the outlet end of the return air duct, a fan 1 and a fan 2 installed in the return air duct, and a fan 3 installed on the outer wall of the warehouse, the inlet end of the return air duct is connected with the interior of the warehouse, and the interior of the return air duct is sequentially installed with a filter, a refrigeration unit and an electric heater from far to near the connecting pipe. The fan 2 is located at the connection between the connecting pipe and the return air duct, so as to draw the air in the return air duct into the interior of the connecting pipe, the filter, the refrigeration unit and the electric heater are located between the fan 1 and the fan 2, and the fan 1 is used to draw the air in the warehouse to the outside of the warehouse, an oxygen concentration sensor 1, an ethylene concentration sensor 1, a carbon dioxide concentration sensor 1 and an air temperature and humidity sensor 1 are also installed on the inner wall of the return air duct near the inlet end, the fan 3 is used to introduce outside air into the interior of the warehouse, and the other end of the connecting pipe is connected to the main pipe; A water-cooled direct expansion environmental simulator is used to automatically adjust the temperature and humidity in the warehouse. The cold air cooled by fan 2 is transported to the warehouse through the connecting pipe. After the mangoes in the warehouse undergo heat exchange, the hot air is sucked into the refrigeration unit through the return air duct to form a closed loop.

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