Freeze drying equipment for dried fruits

Abstract

The invention relates to the technical field of freeze drying, in particular to dried fruit freeze drying equipment which comprises a freeze drying unit. Sealing units are arranged on the upper portion and the lower portion of the freeze-drying unit correspondingly, each sealing unit comprises a sealing shell, a first communicating opening communicating with the outside is formed in the side, away from the freeze-drying unit, of each sealing shell, and a second communicating opening communicating with the freeze-drying unit is formed in the side, close to the freeze-drying unit, of each sealing shell. A feeding frame is movably arranged in the sealing shell in the length direction of the sealing shell, and when the feeding frame moves in the sealing shell, one of the feeding frame and the first communication opening or the second communication opening intersects. The freeze-drying efficiency of the freeze-drying unit is improved, meanwhile, due to the fact that the negative-pressure low-temperature environment of the freeze-drying unit is relatively constant, the negative-pressure low-temperature environment does not need to be reconstructed after feeding and discharging, and energy consumption is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of freeze drying, in particular to a device for freeze drying dried fruits. Background Art

[0002] The existing freeze-drying equipment has poor sealing properties, and external air may enter the freeze-drying equipment, which may cause the temperature of the fruit to rise and moisture to return during freeze-drying. At the same time, the process integration performance is poor and production efficiency cannot be improved.

[0003] Chinese patent announcement No. CN115119876B discloses a fruit freeze-drying and freeze-drying device, including a bracket and a cylinder arranged on the top thereof, a rotor assembly is arranged inside the cylinder, airflow assemblies are arranged on the lateral sides of the cylinder, and material channel assemblies are arranged on the longitudinal sides, the rotor assembly includes a swivel and a plurality of plate boxes arranged on the outside thereof, a net support plate is arranged at the bottom of the plate box, and a sling is arranged on both sides, a pressure plate is arranged on the outer wall of the sling, a filter is arranged on the inner wall of the pressure plate, a buckle shaft is arranged on the inner wall of the opposite side of the pressure plate, and buckles adapted thereto are arranged on both sides of the plate box, a rotary motor is arranged on one side of the cylinder, the output shaft of the rotary motor is sleeved with a core shaft, the core shaft is connected to the swivel, and the core shaft is arranged at the center of both sides of the cylinder.

[0004] Although the above scheme improves the efficiency of fruit freeze-drying through the flowing airflow, the blowing process can only be carried out after reaching the designated blowing station, and there are multiple board boxes for receiving fruits that are rotated and distributed in the cylinder. In this way, the blowing station can only blow and air-dry the fruit in one of the board boxes at a time, and during the blowing and air-drying process, the board boxes cannot rotate, which leads to reduced production. At the same time, the fruit in the board box will roll over during the rotation of the board box, causing the output of the dried fruit to be easily damaged. In addition, the above scheme will cause the negative pressure in the board box to be lost every time the material is loaded and unloaded, and the low-temperature air in the board box will also be lost, resulting in the need to cool the board box again and form negative pressure after each loading and unloading, which has high energy consumption and low production efficiency. Summary of the invention

[0005] In view of the above problems, a fruit and dried fruit freeze-drying device is provided. By arranging sealing units at the upper and lower parts of a freeze-drying unit, the freeze-drying unit needs to pass through the sealing units during the loading and unloading processes, thereby ensuring the sealing of the freeze-drying unit. The sealing unit comprises a sealing shell and a feeding frame movably arranged in the sealing shell. The sealing shell is provided with a first connecting port connected to the outside world and a second connecting port connected to the freeze-drying unit. The dried fruits are put into the feeding frame through the first connecting port, and then the feeding frame moves to the second connecting port, and the feeding frame is connected to one of the first connecting port and the second connecting port, thereby ensuring that when the feeding frame puts the dried fruits into the freeze-drying unit, the freeze-drying unit is in a non-connected state with the outside world, thereby avoiding the rapid loss of negative pressure in the freeze-drying unit and also avoiding the destruction of the low-temperature environment in the freeze-drying unit, so that the dried fruits put into the freeze-drying unit can be freeze-dried immediately.

[0006] In order to solve the problems of the prior art, the present invention provides a fruit dried freeze-drying device, comprising a freeze-drying unit; a sealing unit is arranged at the upper part and the lower part of the freeze-drying unit, the sealing unit comprises a sealing shell, a first connecting port connected to the outside is opened on the side of the sealing shell away from the freeze-drying unit, a second connecting port connected to the freeze-drying unit is opened on the side of the sealing shell close to the freeze-drying unit, a feeding frame is arranged inside the sealing shell for movement along the length direction of the sealing shell, and the feeding frame selectively intersects with the first connecting port or the second connecting port when moving inside the sealing shell.

[0007] Preferably, after the feeding frame leaves the first connecting port, a sealed cavity is formed with the sealing shell, and a suction port for discharging gas in the sealed cavity is provided on the sealing shell, and a pump body is provided at one end of the suction port.

[0008] Preferably, the freeze-drying unit includes a horizontally placed cylindrical shell, a rotating frame is arranged inside the shell to rotate around the axis of the shell, and a plurality of freeze-drying bins for receiving dried fruits are evenly arranged around the rotating frame. The freeze-drying bins are hingedly matched with the rotating frame, and the weight of the freeze-drying bins below the hinge is greater than the weight of the freeze-drying bins above the hinge.

[0009] Preferably, a containing cavity is provided inside the freeze-drying chamber, an opening is provided at the top of the containing cavity, and the bottom height of the containing cavity is lower than the height of the hinge between the freeze-drying chamber and the rotating frame.

[0010] Preferably, two vents are sequentially opened at both ends of the freeze-drying chamber along the rotation axis of the freeze-drying chamber, one of which injects low-temperature air into the freeze-drying chamber, and the other vent discharges the low-temperature air in the freeze-drying chamber.

[0011] Preferably, a discharge port is provided at the bottom of the shell, and a rotating unit is provided on one side of each freeze-drying bin. When the freeze-drying bin rotates to the discharge port along with the rotating frame, the rotating unit drives the freeze-drying bin to rotate.

[0012] Preferably, the rotating unit includes a second gear ring fixedly mounted on the periphery of the freeze-drying chamber, and a second gear meshed with one side of the second gear ring, and a second rotary driver for driving the second gear to rotate is arranged on the rotating frame.

[0013] Preferably, a clutch unit is provided between the second gear and the second rotary driver, and the second rotary driver drives the second gear to rotate via the clutch unit. The clutch unit is in a closed state when the freeze-drying chamber is located directly above the discharge port.

[0014] Preferably, the clutch unit includes a first clutch disk fixedly arranged at the end of the second gear, and the clutch unit also includes an extension rod that passes through the first clutch disk and the second gear in sequence along the axis of the first clutch disk, the extension rod slidingly cooperates with the first clutch disk and the second gear respectively, and a second clutch disk that moves synchronously with the extension rod is arranged on the extension rod, and an electromagnet for magnetically attracting the end of the extension rod is arranged at one end of the extension rod.

[0015] Preferably, a first drive gear is arranged on the output end of the second rotary driver, a plurality of second drive gears are arranged around the first drive gear, the axis of the second drive gear is colinear with the axis of the second gear, and the extension rod slides through the second drive gear and is key-connected to the second drive gear.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention arranges sealing units at the upper and lower parts of the freeze-drying unit so that the freeze-drying unit needs to pass through the sealing units during the process of loading and unloading, thereby ensuring the sealing of the freeze-drying unit. The sealing unit includes a sealing shell and a feeding frame movably arranged in the sealing shell. The sealing shell is provided with a first connecting port connected to the outside world and a second connecting port connected to the freeze-drying unit. The dried fruits are put into the feeding frame through the first connecting port, and then the feeding frame moves to the second connecting port, and the feeding frame selects one of the first connecting port and the second connecting port for connection, thereby ensuring that when the feeding frame puts the dried fruits into the freeze-drying unit, the freeze-drying unit is in a non-connected state with the outside world, thereby avoiding the rapid loss of negative pressure in the freeze-drying unit and also avoiding the destruction of the low-temperature environment in the freeze-drying unit, so that the dried fruits put into the freeze-drying unit can be freeze-dried immediately, thereby improving the freeze-drying efficiency of the freeze-drying unit. At the same time, since the negative pressure and low-temperature environment of the freeze-drying unit is relatively constant, there is no need to rebuild the negative pressure and low-temperature environment after loading and unloading, thereby reducing energy consumption.

[0017] 2. The freeze-drying chamber is hinged on the rotating frame, and the weight of the freeze-drying chamber below the hinge is made greater than the weight of the freeze-drying chamber above the hinge. When the freeze-drying chamber rotates with the rotating frame, the freeze-drying chamber can rotate around its own axis in real time according to the rotation of the rotating frame, thereby ensuring that the opening of the freeze-drying chamber is always vertically upward, avoiding the fruits and dried fruits in the freeze-drying chamber from tumbling, thereby avoiding the fruits and dried fruits from being damaged during tumbling, and ensuring the shape integrity of the fruits and dried fruits after freeze-drying.

[0018] 3. By providing a vent at each end of the freeze-drying chamber, low-temperature air can flow in real time during the rotation of the freeze-drying chamber, so that the sublimated water vapor can be quickly taken away from the freeze-drying chamber, thereby improving the freeze-drying efficiency of dried fruits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of a fruit dried freeze-drying device of the present invention. Figure 1 .

[0020] Figure 2 This is a three-dimensional schematic diagram of a fruit dried freeze-drying device of the present invention. Figure 2 .

[0021] Figure 3 The invention relates to a fruit dried freeze drying device. Figure 2 A local enlarged schematic diagram of point A in the middle.

[0022] Figure 4 It is a side view of a device for freeze-drying dried fruits of the present invention.

[0023] Figure 5 The invention relates to a fruit dried freeze drying device. Figure 4 Schematic cross-sectional view at the middle BB.

[0024] Figure 6 This is a cutaway stereoscopic diagram of a fruit dried freeze drying device of the present invention. Figure 1 .

[0025] Figure 7 This is a cutaway stereoscopic diagram of a fruit dried freeze drying device of the present invention. Figure 2 .

[0026] Figure 8 The invention relates to a fruit dried freeze drying device. Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0027] Fig. 9 The invention relates to a fruit dried freeze drying device. Figure 7 A partial enlarged schematic diagram of point D in the middle.

[0028] Fig.10The invention discloses a three-dimensional schematic diagram of a fruit dried freeze-drying device with a sealing unit, a housing, a rotating rack and a part of a freeze-drying chamber removed.

[0029] Fig.11 The invention relates to a fruit dried freeze drying device. Fig.10 A partial enlarged schematic diagram of point E in the middle.

[0030] The numbers in the figure are: 1. freeze-drying unit; 11. rotating frame; 111. first gear ring; 112. first gear; 113. first rotating driver; 12. freeze-drying chamber; 121. accommodating chamber; 122. vent; 13. shell; 131. feeding port; 132. discharging port; 14. rotating unit; 141. second gear ring; 142. second gear; 15. second rotating driver; 16. clutch unit; 161. first clutch disk; 162. second clutch disk; 163. extension rod; 164. electromagnet; 165. first spring; 166. second spring; 17. first driving gear; 18. second driving gear; 2. sealing unit; 21. sealing shell; 211. first connecting port; 212. second connecting port; 22. feeding frame; 23. air extraction port; 24. driving unit; 241. third rotating driver; 242. screw rod. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] Reference Figure 1 , Figure 2 and Figure 4-Figure 6 A fruit dried freeze-drying device comprises a freeze-drying unit 1; a sealing unit 2 is arranged at the upper and lower parts of the freeze-drying unit 1, the sealing unit 2 comprises a sealing shell 21, a first connecting port 211 communicating with the outside is opened on the side of the sealing shell 21 away from the freeze-drying unit 1, a second connecting port 212 communicating with the freeze-drying unit 1 is opened on the side of the sealing shell 21 close to the freeze-drying unit 1, a feeding frame 22 is arranged in the sealing shell 21 to move along the length direction of the sealing shell 21, and the feeding frame 22 intersects with the first connecting port 211 or the second connecting port 212 when moving in the sealing shell 21.

[0033] The freeze-drying process of dried fruits mainly depends on air pressure and temperature. First, the air pressure needs to be in a negative pressure state, and the lower the air pressure, the better the freeze-drying effect. Secondly, the temperature needs to be below 0 degrees Celsius. This is because the water in the fruit freezes at 0 degrees Celsius, and when the air pressure is negative, the ice will sublimate, so that the solid ice can directly change into water vapor. In traditional freeze-drying equipment, when the fruit is put into the freeze-drying equipment, the freeze-drying unit 1 in the freeze-drying equipment will be directly connected to the outside world, resulting in the complete loss of negative pressure and low temperature in the freeze-drying unit 1. Therefore, each time the dried fruit is put into the freeze-drying equipment, the freeze-drying equipment needs to re-form a negative pressure environment and cool down at the same time, which consumes more energy and has lower efficiency.

[0034] In order to avoid the above situation, a sealing unit 2 is provided at the upper and lower parts of the freeze-drying unit 1, so that the negative pressure environment and low-temperature gas in the freeze-drying unit 1 will not be lost quickly during the loading and unloading process, thus saving energy consumption and improving production efficiency. The specific structure and working process of the sealing unit 2 are as follows: Since the working principles of the sealing units 2 respectively arranged at the upper and lower parts of the freeze-drying unit 1 are the same, the present invention only describes the sealing unit 2 arranged at the upper part of the freeze-drying unit 1. First, the dried fruits are put into the sealing shell 21 located at the upper part of the freeze-drying unit 1. In order to improve the efficiency of freeze-drying, the dried fruits need to be frozen in advance. When the dried fruits are put into the sealing shell 21, they need to be put in from the first connecting port 211 of the sealing shell 21. At this time, the feeding frame 22 is located directly below the first connecting port 211, and the feeding frame 22 completely overlaps with the first connecting port 211. In this way, the dried fruits put into the sealing shell 21 enter the feeding frame 22 from the first connecting port 211. After the feeding is completed, , the feeding frame 22 moves toward the second connecting port 212 along the length direction of the sealing shell 21, and the feeding frame 22 intersects with the first connecting port 211 or the second connecting port 212 when moving in the sealing shell 21, that is, when the feeding frame 22 moves in the sealing shell 21, if the feeding frame 22 intersects with the first connecting port 211, the feeding frame 22 and the second connecting port 212 are in a non-connected state, and similarly, if the feeding frame 22 intersects with the second connecting port 212, the feeding frame 22 and the first connecting port 211 are in a non-connected state. In this way, when the feeding frame 22 drives the dried fruits to move toward the second connecting port 212, before the feeding frame 22 completely leaves the first connecting port 211, the feeding frame 22 will not intersect and connect with the second connecting port 212. When the feeding frame 22 intersects with the second connecting port 212, the dried fruits stored in the feeding frame 22 fall into the freeze-drying unit 1 through the second connecting port 212. At this time, the feeding frame 22 and the first connecting port 211 are in a non-connected state, that is, the freeze-drying unit 1 is in a non-connected state with the outside world, so that the negative pressure and low temperature in the freeze-drying unit 1 will not be lost quickly. When the feeding frame 22 is connected to the second connecting port 212, a small amount of low-temperature gas in the freeze-drying unit 1 will flow into the feeding frame 22, and the gas pressure in the freeze-drying unit 1 will also rise. However, the volume of the feeding frame 22 is limited, and the impact on the freeze-drying unit 1 is small. The negative pressure and low-temperature gas in the freeze-drying unit 1 will not be lost quickly, which ensures that the freeze-drying unit 1 can immediately perform freeze-drying operations after completing the loading, thereby improving production efficiency.

[0035] By arranging the sealing unit 2 at the upper and lower parts of the freeze drying unit 1, the freeze drying unit 1 needs to pass through the sealing unit 2 during the loading and unloading process, thereby ensuring the sealing of the freeze drying unit 1. The sealing unit 2 includes a sealing shell 21 and a feeding frame 22 movably arranged in the sealing shell 21. The sealing shell 21 is provided with a first connecting port 211 communicating with the outside world and a second connecting port 212 communicating with the freeze drying unit 1. The dried fruits are put into the feeding frame 22 through the first connecting port 211, and then the feeding frame 22 moves to the second connecting port 212, and the feeding frame 22 Selecting one of the first connecting port 211 and the second connecting port 212 to be connected ensures that when the feeding frame 22 puts the dried fruits into the freeze-drying unit 1, the freeze-drying unit 1 is in a non-connected state with the outside world, thereby avoiding the rapid loss of negative pressure in the freeze-drying unit 1 and also avoiding the destruction of the low-temperature environment in the freeze-drying unit 1, so that the dried fruits put into the freeze-drying unit 1 can be freeze-dried immediately, thereby improving the freeze-drying efficiency of the freeze-drying unit 1. At the same time, since the negative pressure and low-temperature environment of the freeze-drying unit 1 is relatively constant, there is no need to rebuild the negative pressure and low-temperature environment after loading and unloading, thereby reducing energy consumption.

[0036] Reference Figure 5 and Figure 6 After the feeding frame 22 leaves the first connecting port 211, it forms a sealed cavity with the sealing shell 21. The sealing shell 21 is provided with an exhaust port 23 for discharging the gas in the sealed cavity, and a pump body is provided at one end of the exhaust port 23.

[0037] When the dried fruits are put into the feeding frame 22 through the first connecting port 211, the feeding frame 22 moves toward the second connecting port 212 in the sealing shell 21. When the feeding frame 22 completely leaves the first connecting port 211, the feeding frame 22 and the sealing shell 21 form a sealed cavity. The air suction port 23 is arranged on the sealing shell 21. The air suction port 23 extracts the air in the sealed cavity, so that the air pressure in the sealed cavity gradually decreases, so that the sealed cavity is in a negative pressure state. When the feeding frame 22 completely passes through the air suction port 23, the pump body stops running and the air suction port 23 stops exhausting. When the feeding frame 22 drives the dried fruits to move to the second connecting port 212, the feeding frame 22 is connected with the freeze-drying unit 1 through the second connecting port 212. Since the feeding frame 22 is in a negative pressure state, the air pressure in the freeze-drying unit 1 will not fluctuate during the process of loading the freeze-drying unit 1, thereby ensuring the stability of the air pressure in the freeze-drying unit 1.

[0038] Reference Figure 1 and Figure 2The freeze drying unit 1 comprises a horizontally placed cylindrical shell 13, in which a rotating frame 11 is arranged to rotate around the axis of the shell 13, and a plurality of freeze drying chambers 12 for receiving dried fruits are evenly arranged around the rotating frame 11, and the freeze drying chambers 12 are hingedly matched with the rotating frame 11, and the weight of the freeze drying chamber 12 below the hinge is greater than the weight of the freeze drying chamber 12 above the hinge.

[0039] An opening is provided at the upper portion of the freeze-drying chamber 12. When the rotating frame 11 rotates in the outer shell 13, the freeze-drying chamber 12 hinged on the rotating frame 11 rotates synchronously with the rotating frame 11. Since the center of gravity of the freeze-drying chamber 12 is relatively low, during the rotation of the rotating frame 11, the opening of the freeze-drying chamber 12 is always vertically upward. That is, when the rotating frame 11 rotates, although the freeze-drying chamber 12 will rotate with the rotating frame 11 around the axis of the outer shell 13, the freeze-drying chamber 12 can rotate around its own axis in real time according to the rotation of the rotating frame 11, thereby avoiding the tumbling of the dried fruits in the freeze-drying chamber 12, thereby avoiding the damage of the dried fruits during tumbling, and ensuring the shape integrity of the dried fruits after freeze-drying. A first gear ring 111 is fixedly provided at the end of the rotating frame 11, a first gear 112 is meshed with one side of the first gear ring 111, and a first rotation driver 113 for driving the first gear 112 to rotate is provided at the end of the first gear 112. The first rotation driver 113 drives the rotating frame 11 to rotate via the first gear 112 and the first gear ring 111.

[0040] Reference Figure 6 A receiving chamber 121 is provided inside the freeze-drying chamber 12, an opening is provided at the upper portion of the receiving chamber 121, and a bottom height of the receiving chamber 121 is lower than a height of a hinge between the freeze-drying chamber 12 and the rotating frame 11.

[0041] This ensures that the center of gravity of the freeze-drying bin 12 is still located below the hinge between the freeze-drying bin 12 and the rotating frame 11 after receiving the dried fruits, thereby ensuring the stability of the freeze-drying bin 12 when rotating with the rotating frame 11 after receiving the dried fruits.

[0042] Reference Figure 7 Two vents are sequentially opened at both ends of the freeze-drying chamber 12 along the rotation axis of the freeze-drying chamber 12, one of which injects low-temperature air into the freeze-drying chamber 12, and the other vent discharges the low-temperature air in the freeze-drying chamber 12.

[0043] Chinese patent publication number CN115119876B discloses a fruit freeze-drying and freeze-drying device, wherein a blowing station for allowing low-temperature air to flow is arranged inside the device. Through the flow of low-temperature air, the sublimated water vapor can be quickly taken away, thereby accelerating the freeze-drying effect of the dried fruits. However, since the position of the blowing station in the device is fixed, the freeze-drying bin 12 needs to be rotated to the blowing station with the rotating frame 11 before the low-temperature air in the freeze-drying bin 12 can flow normally, and the efficiency is low. The present invention provides a vent at each end of the freeze-drying bin 12, so that the two vents can also drive the low-temperature air in the freeze-drying bin 12 to flow normally when the freeze-drying bin 12 and the rotating frame 11 rotate relative to each other, so that the sublimated water vapor can be quickly taken away, thereby improving the freeze-drying efficiency.

[0044] Reference Figure 7 A discharge port 132 is provided at the bottom of the outer shell 13, and a rotating unit 14 is provided on one side of each freeze-drying bin 12. When the freeze-drying bin 12 rotates to the discharge port 132 along with the rotating frame 11, the rotating unit 14 drives the freeze-drying bin 12 to rotate.

[0045] A feed port 131 is provided at the upper portion of the outer shell 13. When the freeze-drying bin 12 rotates with the rotating frame 11 to reach the feed port 131, the dried fruits in the feeding frame 22 fall into the freeze-drying bin 12 from the feed port 131. When the rotating frame 11 drives the freeze-drying bin 12 to rotate to the lower side of the outer shell 13, that is, the freeze-drying bin 12 is located directly above the discharge port 132, the rotating unit 14 drives the freeze-drying bin 12 to rotate, so that the dried fruits in the freeze-drying bin 12 are discharged from the opening of the freeze-drying bin 12.

[0046] Reference Fig.10 and Fig.11 The rotating unit 14 includes a second gear ring 141 fixedly mounted on the periphery of the freeze-drying chamber 12, and a second gear 142 meshing on one side of the second gear ring 141. A second rotating driver 15 is provided on the rotating frame 11 to drive the second gear 142 to rotate.

[0047] In order to reduce manufacturing costs, only one second rotary drive 15 is provided, and the second rotary drive 15 is preferably a servo motor.

[0048] Reference Figure 2 : A clutch unit 16 is arranged between the second gear 142 and the second rotation driver 15. The second rotation driver 15 drives the second gear 142 to rotate through the clutch unit 16. The clutch unit 16 is in a closed state when the freeze-drying chamber 12 is located directly above the discharge port 132.

[0049] The second rotary driver 15 is arranged on the rotating frame 11. Since the rotating units 14 correspond to the freeze-drying chambers 12 one by one, and each rotating unit 14 includes a second gear 142, a plurality of clutch units 16 are also arranged. If the clutch unit 16 is not arranged, so that the second rotary driver 15 is directly connected to the second gear 142, then as the rotating frame 11 rotates, the freeze-drying chamber 12 rotating around the axis of the freeze-drying chamber 12 on the rotating frame 11 can drive the second gear 142 to rotate through the second gear ring 141, so that the second gear 142 drives the driving shaft of the second rotary driver 15 to rotate in the opposite direction, which can easily cause damage to the second rotary driver 15. At the same time, the direct connection between the second rotary driver 15 and the second gear 142 will also hinder the normal rotation of the freeze-drying chamber 12, which can easily cause the freeze-drying chamber 12 to tilt during rotation, thereby causing the fruits and dried fruits in the freeze-drying chamber 12 to slide or roll.

[0050] Reference Figure 3 and Figure 8-Figure 11 The clutch unit 16 includes a first clutch disk 161 fixedly arranged at the end of the second gear 142. The clutch unit 16 also includes an extension rod 163 that passes through the first clutch disk 161 and the second gear 142 in sequence along the axis of the first clutch disk 161. The extension rod 163 slides with the first clutch disk 161 and the second gear 142 respectively. The extension rod 163 is provided with a second clutch disk 162 that moves synchronously with the extension rod 163. An electromagnet 164 for magnetically attracting the end of the extension rod 163 is provided at one end of the extension rod 163.

[0051] A first spring 165 is provided on the side of the extension rod 163 away from the electromagnet 164. The first spring 165 is used to prevent the extension rod 163 from moving in the direction of the electromagnet 164. When the electromagnet 164 is energized, the extension rod 163 drives the second clutch disk 162 to move synchronously, the first clutch disk 161 and the second clutch disk 162 are in contact, and the first spring 165 is stretched. When the electromagnet 164 is not energized, the first spring 165 drives the extension rod 163 to reset, and the first clutch disk 161 and the second clutch disk 162 are disconnected. A second spring 166 is provided at the end of the second clutch disk 162 away from the first clutch disk 161, and the extension rod 163 drives the second clutch disk 162 to When the first clutch disk 161 contacts, the second spring 166 is squeezed by the second clutch disk 162, and the second spring 166 provides pressing force for the second clutch disk 162. The second clutch disk 162 is key-connected and slidably matched with the extension rod 163. When the second rotary driver 15 is running, the extension rod 163 rotates around its own axis, and the extension rod 163 can drive the second clutch disk 162 to rotate. In this way, when the second clutch disk 162 contacts the first clutch disk 161, the first clutch disk 161 can be driven, and then the second gear 142 drives the second gear ring 141 to rotate, and finally the freeze-drying chamber 12 rotates, so that the dried fruits stored in the freeze-drying chamber 12 are discharged from the discharge port 132.

[0052] Reference Figure 1 , Figure 2 , Fig. 9 and Fig.10 : A first driving gear 17 is arranged on the output end of the second rotating driver 15, and a plurality of second driving gears 18 are arranged around the first driving gear 17. The axis of the second driving gear 18 is colinear with the axis of the second gear 142, and the extension rod 163 slides through the second driving gear 18 and is key-connected to the second driving gear 18.

[0053] The number of second drive gears 18 corresponds to the number of second gears 142, so that when the freeze-drying bin 12 rotates to just above the discharge port 132, the rotating unit 14 and the corresponding clutch unit 16 of the freeze-drying bin 12 are started, so that the second rotary driver 15 can smoothly drive the freeze-drying bin 12 to rotate through the clutch unit 16. At the same time, when the freeze-drying bin 12 has not reached just above the discharge port 132, the clutch unit 16 is in a non-connected state, ensuring that during the rotation of the follower frame, the freeze-drying bin 12 rotates in real time under the action of its own center of gravity, keeping the opening of the freeze-drying bin 12 always vertically upward.

[0054] A driving unit 24 for driving the feeding frame 22 to move is provided on the sealing shell 21. The driving unit 24 includes a screw rod 242 that penetrates the feeding frame 22 along the length direction of the sealing shell 21. The screw rod 242 is threadedly matched with the feeding frame 22. A third rotating driver 241 for driving the screw rod 242 to rotate is provided at the end of the screw rod 242. The third rotating driver 241 is preferably a servo motor. The third rotating driver 241 drives the screw rod 242 to rotate so that the feeding frame 22 moves in the sealing shell 21.

[0055] Working principle: First, put the dried fruits into the sealed shell 21 located at the upper part of the freeze-drying unit 1. In order to improve the efficiency of freeze-drying, the dried fruits need to be frozen in advance. When the dried fruits are put into the sealed shell 21, they need to be put in from the first connecting port 211 of the sealed shell 21. At this time, the feeding frame 22 is located directly below the first connecting port 211, and the feeding frame 22 completely overlaps with the first connecting port 211. In this way, the dried fruits put into the sealed shell 21 enter the feeding frame 22 from the first connecting port 211. After the bundle is bundled, the feeding frame 22 moves toward the second connecting port 212 along the length direction of the sealing shell 21. When the feeding frame 22 moves in the sealing shell 21, it intersects with the first connecting port 211 or the second connecting port 212, that is, when the feeding frame 22 moves in the sealing shell 21, if the feeding frame 22 intersects with the first connecting port 211, the feeding frame 22 and the second connecting port 212 are in a non-connected state. Similarly, if the feeding frame 22 intersects with the second connecting port 212, the feeding frame 22 and the first connecting port 211 are in a non-connected state. In this way, when the feeding frame 22 drives the dried fruits to move toward the second connecting port 212, before the feeding frame 22 completely leaves the first connecting port 211, the feeding frame 22 will not intersect and connect with the second connecting port 212. When the feeding frame 22 intersects with the second connecting port 212, the dried fruits stored in the feeding frame 22 fall into the freeze-drying unit 1 through the second connecting port 212. At this time, the feeding frame 22 and the first connecting port 211 are in a non-connected state, that is, the freeze-drying unit 1 is in a non-connected state with the outside world, so that the negative pressure and low temperature in the freeze-drying unit 1 will not be lost quickly. When the feeding frame 22 is connected to the second connecting port 212, a small amount of low-temperature gas in the freeze-drying unit 1 will flow into the feeding frame 22, and the gas pressure in the freeze-drying unit 1 will also rise, but the volume of the feeding frame 22 is limited, and the impact on the freeze-drying unit 1 is small, and the negative pressure and low-temperature gas in the freeze-drying unit 1 will not be lost quickly.

[0056] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A fruit dried freeze drying device, comprising a freeze drying unit (1); It is characterized in that A sealing unit (2) is arranged at the upper and lower parts of the freeze-drying unit (1), and the sealing unit (2) comprises a sealing shell (21). A first connecting port (211) communicating with the outside is provided on a side of the sealing shell (21) away from the freeze-drying unit (1), and a second connecting port (212) communicating with the freeze-drying unit (1) is provided on a side of the sealing shell (21) close to the freeze-drying unit (1). A feeding frame (22) is arranged inside the sealing shell (21) to move along the length direction of the sealing shell (21), and the feeding frame (22) selectively intersects with the first connecting port (211) or the second connecting port (212) when moving inside the sealing shell (21).

2. A dried fruit freeze-drying device according to claim 1, characterized in that: After the feeding frame (22) leaves the first connecting port (211), a sealed cavity is formed with the sealing shell (21); an exhaust port (23) for exhausting gas in the sealed cavity is provided on the sealing shell (21); a pump body is provided at one end of the exhaust port (23).

3. The dried fruit freeze-drying equipment according to claim 1, characterized in that: The freeze drying unit (1) comprises a horizontally placed cylindrical shell (13), a rotating frame (11) is arranged in the shell (13) to rotate around the axis of the shell (13), a plurality of freeze drying bins (12) for receiving dried fruits are evenly arranged on the rotating frame (11) and around the rotating frame (11), the freeze drying bins (12) and the rotating frame (11) are hingedly matched, and the weight of the freeze drying bins (12) below the hinge is greater than the weight of the freeze drying bins (12) above the hinge.

4. The dried fruit freeze-drying equipment according to claim 3, characterized in that: A containing chamber (121) is provided inside the freeze-drying chamber (12), an opening is provided at the top of the containing chamber (121), and the bottom height of the containing chamber (121) is lower than the height of the hinge between the freeze-drying chamber (12) and the rotating frame (11).

5. The dried fruit freeze-drying equipment according to claim 3, characterized in that: Two vents are provided at both ends of the freeze drying chamber (12) and are arranged in sequence along the rotation axis of the freeze drying chamber (12), one of the vents injects low-temperature air into the freeze drying chamber (12), and the other vent discharges the low-temperature air in the freeze drying chamber (12).

6. The dried fruit freeze-drying equipment according to claim 3, characterized in that: A discharge port (132) is provided at the bottom of the outer shell (13), and a rotating unit (14) is provided on one side of each freeze-drying bin (12). When the freeze-drying bin (12) rotates to the discharge port (132) along with the rotating frame (11), the rotating unit (14) drives the freeze-drying bin (12) to rotate.

7. The dried fruit freeze-drying equipment according to claim 6, characterized in that: The rotating unit (14) comprises a second gear ring (141) fixedly mounted on the periphery of the freeze-drying chamber (12), and a second gear (142) meshed with one side of the second gear ring (141), and a second rotary drive (15) for driving the second gear (142) to rotate is arranged on the rotating frame (11).

8. The dried fruit freeze-drying equipment according to claim 7, characterized in that: A clutch unit (16) is provided between the second gear (142) and the second rotary driver (15), and the second rotary driver (15) drives the second gear (142) to rotate via the clutch unit (16). The clutch unit (16) is in a closed state when the freeze-drying chamber (12) is located directly above the discharge port (132).

9. The dried fruit freeze-drying equipment according to claim 8, characterized in that: The clutch unit (16) comprises a first clutch disk (161) fixedly arranged at the end of the second gear (142), and the clutch unit (16) further comprises an extension rod (163) which passes through the first clutch disk (161) and the second gear (142) in sequence along the axis of the first clutch disk (161), the extension rod (163) slidingly cooperates with the first clutch disk (161) and the second gear (142) respectively, the extension rod (163) is provided with a second clutch disk (162) which moves synchronously with the extension rod (163), and an electromagnet (164) for magnetically attracting the end of the extension rod (163) is provided at one end of the extension rod (163).

10. The dried fruit freeze-drying equipment according to claim 1, characterized in that: A first drive gear (17) is arranged at the output end of the second rotary driver (15), a plurality of second drive gears (18) are arranged around the first drive gear (17), the axis of the second drive gear (18) is colinear with the axis of the second gear (142), and the extension rod (163) slides through the second drive gear (18) and is key-connected to the second drive gear (18).

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