Freeze-drying equipment capable of sterilizing at negative pressure and working method thereof

Abstract

The invention discloses freeze-drying equipment capable of achieving negative pressure sterilization and a working method. The freeze-drying equipment comprises a freeze-drying bin, a mounting assembly and a food rack. A fixing seat is arranged at the upper end of the food rack, and a mounting seat matched with the fixing seat is arranged on the inner wall of the freeze-drying chamber. The guide block is inserted between the sealing plate and the driving plate and used for pushing the driving plate to move in the transverse groove and the vertical groove, and the traction piece is kept to pull the sealing plate to seal the disinfection hole. According to the freeze-drying equipment capable of performing negative pressure sterilization, food on the food rack is automatically fed into the freeze-drying chamber to be processed, and then the position of the food rack is limited through the limiting assembly, so that the food rack can be limited at a specified position, and rapid processing of the food is facilitated. And meanwhile, the disinfection holes in the freeze-drying chamber can be blocked under the guidance of the guide block on the food rack through the mounting assembly on the food rack, so that automatic operation is realized, the labor intensity of workers is reduced, and the disinfection time of the freeze-drying chamber in the later period is saved.

Description

Technical Field

[0001] The invention relates to freeze-drying technology, in particular to a freeze-drying device capable of negative pressure sterilization. Background Art

[0002] The vacuum freeze dryer is referred to as freeze dryer. Its working principle is to refrigerate the cold trap (also called water trap) through a refrigeration system mainly composed of a compressor, a condenser and an expansion valve, so that the temperature of the cold trap reaches -45℃ to -80℃, and then the vacuum pump evacuates the cold trap in the low temperature state, so that the water molecules in the frozen material in the drying room sublime and vaporize, and then transfer and freeze to the metal surface inside the cold trap, thereby completing the freeze-drying of the material.

[0003] The freeze dryers used in the traditional freeze drying industry need to be sterilized to facilitate the next freezing operation. Currently, manual spraying is mainly used, which not only requires entering the freeze dryer, which is dangerous, but also takes a long time to handle, affecting the next freeze drying operation time. At the same time, the position of the food rack is not easy to control, which affects the freeze drying of food on multiple groups of food racks. Summary of the invention

[0004] In order to solve the defects of the above-mentioned prior art, the present invention proposes a freeze-drying device capable of negative pressure sterilization.

[0005] The technical solution of the present invention is achieved in this way: A freeze-drying device capable of negative pressure sterilization, comprising: A freeze drying warehouse, wherein the interior of the freeze drying warehouse is hollowed out to form a freeze drying chamber, one end of the freeze drying chamber is opened to form an input port, a warehouse door is provided at the input port, a steam transmission pipeline is provided outside the freeze drying chamber, the steam transmission pipeline extends into the freeze drying chamber, a first pipeline is provided on the freeze drying warehouse, a vacuum pump is provided on the first pipeline, a heating pipe is further provided on the freeze drying warehouse, the heating pipe extends into the freeze drying chamber, a cooler is provided inside the freeze drying chamber, and the cooler is arranged at the lower end of the steam transmission pipeline, A plurality of mounting components are arranged on the inner wall of the freeze-drying chamber, the mounting components are arranged symmetrically, a mounting piece is arranged in the mounting component, the mounting piece is composed of a mounting rod, a vertical plate and a horizontal plate, the vertical plate is arranged on the mounting rod, the horizontal plate is arranged on the vertical plate, the horizontal plate is arranged perpendicular to the vertical plate, an extension portion is arranged on the horizontal plate, an extension hole is formed inside the extension portion, a disinfection hole is arranged in the middle of the horizontal plate, the disinfection hole is connected with the extension hole, a sealing plate is arranged at the lower end of the horizontal plate, sliding portions are arranged at both ends of the sealing plate, strip holes are arranged on the sliding portion, and a strip hole is arranged on the lower end surface of the horizontal plate A sliding groove matched with the sliding part, a groove is provided on the vertical plate, a first spring is provided in the sliding groove, one end of the first spring contacts the inner wall of the groove, and the other end contacts the sealing plate, a traction member is provided at one end of the sealing plate, a guide rod is provided in the groove, a transverse groove and a vertical groove are provided on the vertical plate, the transverse groove is vertically arranged with the vertical groove, a driving plate is provided on the vertical plate, a first rod body is provided at one end of the driving plate, and a second rod body is provided at the other end, the first rod body is placed in the vertical groove, and the second rod body is placed in the transverse groove, one end of the traction member is connected to the sealing plate, and the other end is connected to the first rod body, And a food rack placed in the freeze-drying chamber, wherein a fixing seat is provided at the upper end of the food rack, a symmetrical fixing plate is provided on the fixing seat, and symmetrical rollers are provided in the middle of the fixing plate, a mounting seat is provided on the inner wall of the freeze-drying chamber, a blocking portion is provided at the lower end of the mounting seat, a bearing plate cooperating with the roller is provided at the lower end of the blocking portion, the roller is arranged on the bearing plate, the blocking portion is arranged between the rollers, a guide block is provided on the food rack, the guide block is arranged on the outer wall of the food rack, the guide block is inserted between the sealing plate and the driving plate, and the guide block is used to push the driving plate to move in the horizontal groove and the vertical groove to keep the traction member pulling the sealing plate to seal the disinfection hole.

[0006] In the present invention, a second spring is arranged in the vertical groove, a third spring is arranged in the transverse groove, the second spring is in contact with the first rod body, and the third spring is in contact with the second rod body.

[0007] In the present invention, the disinfection hole is arranged at an angle. When the first rod body of the driving plate is at the upper end of the vertical groove and the second rod body is at one end close to the vertical groove, the driving plate is kept at the lower end of the disinfection hole, and the middle of the driving plate is located in the middle of the disinfection hole.

[0008] In the present invention, the guide block is provided with a protrusion, the protrusion is provided with an arc head, the lower end of the protrusion is provided with a first plane, the guide block is also provided with an inclined plane and a second plane, and the inclined plane connects the first plane and the second plane.

[0009] In the present invention, a support plate is provided on the outer wall of the freeze-drying chamber, a motor is provided on the support plate, a rotating shaft is provided on the mounting rod, the rotating shaft is connected to the motor, a rotating wheel is provided at one end of the rotating shaft, and a rotating member is provided at the other end, the rotating member is located inside the freeze-drying chamber, the rotating wheel is located outside the freeze-drying chamber, and the rotating wheels are connected to each other by belts.

[0010] In the present invention, the rotating member is provided with symmetrically arranged pushing blocks.

[0011] In the present invention, a rotating shaft is provided on the mounting rod, a gear is provided on the rotating shaft, a rack matched with the gear is provided on one side of the food rack, the gear is provided with a first tooth, and the rack is provided with a second tooth matched with the first tooth.

[0012] In the present invention, a symmetrical limiting assembly is provided on the mounting rod, and a limiting plate, a pressure member and a limiting member are provided in the limiting assembly. The limiting plate is connected to the mounting rod, and the pressure member is composed of a cover body and a pressure rod. The interior of the cover body is hollowed out to form a limiting chamber, and a through hole is provided on the limiting plate for the pressure rod to pass through. The pressure rod is placed on the limiting member, and a fourth spring is sleeved on the pressure rod. The upper end of the fourth spring is in contact with the cover body, and the lower end is placed on the limiting plate, and a compression area is formed between the cover body and the limiting plate.

[0013] In the present invention, the limiting member is composed of a mounting section, a connecting section, a first inclined section, a horizontal section and a second inclined section, the pressure rod is placed on the horizontal section, and the second inclined section is placed between the first teeth.

[0014] A working method of a freeze-drying device capable of negative pressure sterilization, using the above-mentioned freeze-drying device, comprises the following steps: Step 1, place the food to be processed on the food rack, start the motor, keep the motor rotating clockwise, drive the belt to rotate, rotate the rotating part, and apply pressure to the limit assembly far away from the input port through the push block to keep the fourth spring compressed; Step 2: The pressure rod applies pressure to the horizontal section on the limiter to keep the second inclined section separated from between the first teeth; Step 3, the food rack is placed on the mounting seat in the freeze-drying chamber, and the rack and gear on the food rack are used to carry the food into the freeze-drying chamber; Step 4: The guide block on the food rack pushes the driving plate to move in the vertical groove and the horizontal groove, and the driving plate drives the traction member to pull the sealing plate to seal the disinfection hole; Step 5: Close the door and start the freeze-drying equipment.

[0015] The freeze-drying equipment capable of negative pressure sterilization according to the present invention has the following beneficial effects: the freeze-drying equipment capable of negative pressure sterilization uses automation to send the food on the food shelf into the freeze-drying chamber for processing, and then limits the position of the food shelf by a limit assembly, so that the food shelf can be limited to a specified position, which is conducive to the rapid processing of the food. At the same time, the installation assembly on the food shelf can guide the guide block on the food shelf to block the disinfection hole in the freeze-drying chamber, thereby realizing automated operation, reducing the labor of the staff, and saving the time for disinfection of the freeze-drying chamber in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the freeze-drying equipment capable of negative pressure sterilization of the present invention; Figure 2 for Figure 1 Schematic diagram of the internal structure; Figure 3 for Figure 2 The main view of Figure 4 FIG is a schematic diagram of the structure of the food rack, the mounting assembly and the limiting assembly in the present invention; Figure 5 for Figure 4 Schematic diagram of food shelf structure in; Figure 6 for Figure 5 Schematic diagram of the boot block structure in; Figure 7 for Figure 2 Schematic diagram of the gas pipeline and cooler structure; Figure 8 for Figure 4 Schematic diagram of the installation components and boot block structure in; Fig. 9 for Figure 8 The main view of Fig.10 for Fig. 9 A local enlarged view of point A in FIG. Fig.11 for Fig.10 Schematic diagram of the sealing plate, traction member and driving plate structure; Fig.12 It is a schematic diagram of the structural installation state of the rotating member, the rotating shaft, the rotating wheel mounting assembly and the limiting assembly in the present invention; Fig.13 for Fig.12 Schematic diagram of the structure of the rotating part, rack and limit assembly in FIG. Fig.14 for Fig.13 Schematic diagram of the limit plate, pressure member and fourth spring structure.

[0017] In the figure: freeze drying chamber 1, mounting assembly 2, food rack 3, disinfection hole 4, positioning hole 5, guide block 6, undercut 7, second spring 8, third spring 9, first spring 10, sealing plate 11, chamber door 12, steam transmission pipeline 13, second pipeline 14, third pipeline 15, small hole 16, first pipeline 17, vacuum pump 18, heating pipe 19, cooler 20, mounting member 21, mounting rod 22, vertical plate 23, transverse plate 24, extension 25, extension hole 26, sliding portion 27, strip hole 28, sliding groove 29, groove 30, traction member 31, guide rod 32, first rod body 33, transverse groove 34, vertical groove 35, drive plate 36, second rod body 37, fixing seat 38, fixing plate 39, roller Wheel 40, mounting seat 41, blocking portion 42, bearing plate 43, protrusion 44, arc head 45, first plane 46, inclined surface 47, second plane 48, support plate 49, motor 50, rotating shaft 51, rotating wheel 52, rotating member 53, belt 54, pushing block 55, limiting assembly 56, pressure member 57, fourth spring 58, rotating shaft 59, gear 60, rack 61, first teeth 62, second teeth 63, limiting plate 64, limiting member 65, cover body 66, pressure rod 67, limiting chamber 68, through hole 69, compression area 70, mounting section 71, connecting section 72, first inclined section 73, horizontal section 74, second inclined section 75, gap 76, disinfection tube 77, elastic arm 78. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figures 1 to 14 As shown, the freeze-drying device capable of negative pressure sterilization of the present invention comprises a freeze-drying chamber 1, a mounting assembly 2 and a food rack 3. The mounting assembly 2 is used to maintain the position of the food rack 3, and to close the disinfection hole 4 in the freeze-drying chamber 1 through the food rack 3 to avoid disinfection during food processing. At the same time, when the food rack 3 is moved out of the freeze-drying chamber, the guide block 6 on the food rack 3 can be kept from pushing the drive plate 36, so that the drive plate 36 is reset when the elastic force of the second spring 8 and the third spring 9 decreases, and the first spring 10 pushes the sealing plate 11 to reset, and the disinfection hole 4 is opened.

[0020] The freeze-drying bin 1 is hollowed out to form a freeze-drying chamber, one end of which is opened to form an input port, at which a bin door 12 is provided, and the bin door 12 can be closed by a sliding rail type door closing method in the prior art.

[0021] A steam pipeline 13 is provided outside the freeze-drying chamber, and the steam pipeline 13 extends into the freeze-drying chamber. A second pipeline 14 and a third pipeline 15 are provided on the steam pipeline 13, and the third pipeline 15 is connected to the second pipeline 14. A small hole 16 is provided on the third pipeline 15. A first pipeline 17 is provided on the freeze-drying chamber 1, and a vacuum pump 18 is provided on the first pipeline 17. A heating pipe 19 is also provided on the freeze-drying chamber 1, and the heating pipe 19 extends into the freeze-drying chamber. A cooler 20 is provided inside the freeze-drying chamber, and the cooler 20 is arranged at the lower end of the steam pipeline 13.

[0022] The mounting assembly 2 is arranged on the inner wall of the freeze drying chamber, and the mounting assembly 2 is arranged in multiple places, and the mounting assembly 2 is symmetrically arranged on the inner wall of the freeze drying chamber. The mounting assembly 2 is provided with a mounting member 21, and the mounting member 21 is composed of a mounting rod 22, a vertical plate 23 and a horizontal plate 24. The vertical plate 23 is arranged on the mounting rod 22, and the horizontal plate 24 is arranged on the vertical plate 23. The horizontal plate 24 is arranged perpendicular to the vertical plate 23. An extension portion 25 is provided on the horizontal plate 24, and an extension hole 26 is formed inside the extension portion 25. A disinfection hole 4 is provided in the middle of the horizontal plate 24, and the disinfection hole 4 is connected to the extension hole 26. A disinfection tube 77 is provided on the extension portion 25, and the disinfection tube 77 extends to the outside of the freeze drying chamber 1.

[0023] A sealing plate 11 is provided at the lower end of the transverse plate 24. Sliding parts 27 are provided at both ends of the sealing plate 11. The sliding parts 27 are provided with strip holes 28. Bolts can be provided on the transverse plate 24 to be inserted into the strip holes 28 to limit the position of the sealing plate 11 and prevent it from falling. A sliding groove 29 is provided on the lower end surface of the transverse plate 24 to cooperate with the sliding part 27. A groove 30 is provided on the vertical plate 23. The groove 30 is connected to the sliding groove 29. A first spring 10 is provided in the sliding groove 29. One end of the first spring 10 contacts the inner wall of the groove 30, and the other end contacts the sealing plate 11. A traction member 31 is provided at one end of the sealing plate 11. A guide rod 32 is provided in the groove 30. The traction member 31 is wound around the guide rod 32 and connected to the first rod body 33.

[0024] The vertical plate 23 is provided with a transverse groove 34 and a vertical groove 35, and the transverse groove 34 is arranged perpendicular to the vertical groove 35. The vertical plate 23 is provided with a driving plate 36, and one end of the driving plate 36 is provided with a first rod 33, and the other end is provided with a second rod 37. The first rod 33 is placed in the vertical groove 35, and the second rod 37 is placed in the transverse groove 34. One end of the traction member 31 is connected to the sealing plate 11, and the other end is connected to the first rod 33.

[0025] A second spring 8 is disposed in the vertical groove 35, a third spring 9 is disposed in the horizontal groove 34, the second spring 8 is in contact with the first rod 33, and the third spring 9 is in contact with the second rod 37. Fig.10As shown, the second spring 8 is arranged at the lower end of the first rod 33, and the third spring 9 is arranged on the left side of the second rod 37. The second spring 8 pushes the first rod 33 on the driving plate 36, and the third spring 9 pushes the second rod 37 on the driving plate 36.

[0026] When the guide block 6 is not inserted between the sealing plate 11 and the driving plate 36, the first spring 10, the second spring 8 and the third spring 9 are all in a natural state. Only after the guide block 6 is inserted, the first spring 10, the second spring 8 and the third spring 9 are in a compressed state.

[0027] The disinfection hole 4 is arranged at an angle. When the first rod body 33 of the driving plate 36 is at the upper end of the vertical groove 35 and the second rod body 37 is at one end close to the vertical groove 35, the driving plate 36 is kept at the lower end of the disinfection hole 4, and the middle of the driving plate 36 is located in the middle of the disinfection hole 4.

[0028] And when the guide block 6 is not inserted between the driving plate 36 and the sealing plate 11, the driving plate 36 is in an inclined setting, which can disperse and guide the disinfection spray sprayed from the inclined disinfection hole 4, thereby improving the disinfection efficiency inside the freeze-drying chamber.

[0029] The food rack 3 is placed in the freeze-drying chamber, and a fixing seat 38 is provided at the upper end of the food rack 3, and a symmetrical fixing plate 39 is provided on the fixing seat 38, and a symmetrical roller 40 is provided in the middle of the fixing plate 39. A mounting seat 41 is provided on the inner wall of the freeze-drying chamber, and a blocking portion 42 is provided at the lower end of the mounting seat 41, and a bearing plate 43 cooperating with the roller 40 is provided at the lower end of the blocking portion 42, and the roller 40 is arranged on the bearing plate 43, and the blocking portion 42 is arranged between the rollers 40. When the food rack 3 is placed in the freeze-drying chamber, the roller 40 is directly slid in, which can not only improve the work efficiency, but also realize the automatic operation.

[0030] A guide block 6 is provided on the food rack 3. The guide block 6 is arranged on the outer wall of the food rack 3. The guide block 6 is inserted between the sealing plate 11 and the driving plate 36. The guide block 6 is used to push the driving plate 36 to move in the transverse groove 34 and the vertical groove 35, and keep the traction member 31 pulling the sealing plate 11 to seal the disinfection hole 4.

[0031] Since the limiting assembly 56 limits the position of the food rack 3 , the guide block 6 can be kept capable of limiting the position of the driving plate 36 , thereby enhancing the sealing effect of the sealing plate 11 on the disinfection hole 4 .

[0032] The guide block 6 is provided with a protrusion 44, on which an arc-shaped head 45 is provided, and a first plane 46 is provided at the lower end of the protrusion 44. The guide block 6 is also provided with an inclined surface 47 and a second plane 48, and the inclined surface 47 connects the first plane 46 and the second plane 48. The upper end of the driving plate 36 is pushed by the protrusion 44. Since the driving plate 36 is originally in a slightly inclined state, when the protrusion 44 on the guide block 6 pushes the driving plate 36, the driving plate 36 moves downward, compressing the second spring 8 and the third spring 9.

[0033] A support plate 49 is provided on the outer wall of the freeze drying chamber 1, a motor 50 is provided on the support plate 49, a rotating shaft 51 is provided on the mounting rod 22, and the rotating shaft 51 is connected to the motor 50. A rotating wheel 52 is provided at one end of the rotating shaft 51, and a rotating member 53 is provided at the other end. The rotating member 53 is located inside the freeze drying chamber 1, and the rotating wheel 52 is located outside the freeze drying chamber 1. The rotating wheels 52 are connected to each other through a belt 54. The motor 50 drives one of the rotating wheels 52 to rotate, and then the rotating wheel 52 at that location can drive the belt 54 to rotate, thereby driving the other rotating wheels 52 to rotate.

[0034] Since the rotating member 53 and the rotating wheel 52 are connected via the rotating shaft 51, the rotating member 53 and the rotating wheel 52 are kept rotating in the same direction. A symmetrically arranged push block 55 is provided on the rotating member 53, and the push block 55 is used to press the pressure member 57 in the limiting assembly 56 to keep the fourth spring 58 compressed.

[0035] A rotating shaft 59 is provided on the mounting rod 22 , and a gear 60 is provided on the rotating shaft 59 . A rack 61 cooperating with the gear 60 is provided on one side of the food rack 3 . The gear 60 is provided with a first tooth 62 , and the rack 61 is provided with a second tooth 63 cooperating with the first tooth 62 .

[0036] A symmetrical limiting assembly 56 is provided on the mounting rod 22, and a limiting plate 64, a pressure member 57 and a limiting member 65 are provided in the limiting assembly 56, and the limiting plate 64 is connected to the mounting rod 22. The pressure member 57 is composed of a cover body 66 and a pressure rod 67, the interior of the cover body 66 is hollowed out to form a limiting chamber 68, and a through hole 69 is provided on the limiting plate 64 for the pressure rod 67 to pass through. The pressure rod 67 is placed on the limiting member 65, and a fourth spring 58 is sleeved on the pressure rod 67, the upper end of the fourth spring 58 is in contact with the cover body 66, and the lower end is placed on the limiting plate 64, and a compression area 70 is formed between the cover body 66 and the limiting plate 64.

[0037] An elastic arm 78 is provided at the lower end of the cover body 66 , an undercut 7 is provided at the lower end of the elastic arm 78 , and a positioning hole 5 into which the undercut 7 is inserted is provided on the limiting plate 64 .

[0038] The limiter 65 is composed of a mounting section 71, a connecting section 72, a first inclined section 73, a horizontal section 74 and a second inclined section 75, and the first inclined section 73 and the second inclined section 75 are both arranged to be inclined downward. The pressure rod 67 is placed on the horizontal section 74, and the second inclined section 75 is placed between the first teeth 62 and the first teeth 62. When the pressure rod 67 applies pressure to the horizontal section 74, the horizontal section 74 can be kept to drive the second inclined section 75 to move downward, so that the second inclined section 75 is separated from the gap 76 between the first teeth 62 and the first teeth 62, and will no longer limit the gear 60 from rotating upward. Limiters 65 are provided at both ends of the guide gear 60, so no matter which direction the gear 60 rotates upward, it will be limited by the limiter 65.

[0039] When the food rack 3 needs to be put in, the motor 50 needs to be started first, so that the motor 50 drives the belt 54 to rotate, and the belt 54 drives other rotating parts 53 to rotate, so that the pushing block 55 presses the pressure member 57, compresses the fourth spring 58, and the pressure rod 67 presses down the horizontal section 74, keeps the second inclined section 75 moving downward together, so that the gear 60 can rotate in one direction, but cannot rotate in the other direction.

[0040] like Fig.12 As shown, the limit assembly 56 in the M direction is close to the input port, while the limit assembly 56 in the N direction is far away from the input port. Figure 1 When the middle motor 50 is started, it drives the belt 54 to rotate clockwise, which drives the pressure member 57 in the limiting assembly 56 in the N direction to press downward, thereby keeping the second inclined section 75 in this direction moving downward and breaking away from the contact with the first tooth 62.

[0041] like Fig.12 As shown, when the food rack 3 is inserted, the rack 61 pushes the gear 60 to rotate clockwise, so that the second inclined section 75 in the M direction is pushed downward by the first tooth 62 and will not block the rotation of the gear 60. The second inclined section 75 in the N direction does not contact the tooth at this time, so it will not block the rotation of the gear 60.

[0042] A working method of a freeze-drying device capable of negative pressure sterilization, using the above-mentioned freeze-drying device, comprises the following steps: Step 1: Place the food to be processed on the food rack 3, start the motor 50, keep the motor 50 rotating clockwise, drive the belt 54 to rotate, rotate the rotating member 53, and apply pressure to the limit assembly 56 away from the input port through the push block 55 to keep the fourth spring 58 compressed.

[0043] Step 2: The pressure rod 67 applies pressure to the horizontal section 74 on the limiting member 65 to keep the second inclined section 75 disengaged from between the first teeth 62 .

[0044] Step 3: The food rack 3 is placed on the mounting seat 41 in the freeze-drying chamber, and the rack 61 on the food rack 3 cooperates with the gear 60 to place the food rack 3 in the freeze-drying chamber.

[0045] Step 4: The guide block 6 on the food rack 3 pushes the driving plate 36 to move in the vertical slot 35 and the horizontal slot 34 , and the driving plate 36 drives the traction member 31 to pull the sealing plate 11 to seal the disinfection hole 4 .

[0046] Step 5, close the door 12 and start the freeze-drying equipment. Start the cooler 20, lower the temperature to below 0°C, then start the vacuum pump 18, reduce the pressure to about 80pa, and close the cooler 20 and the vacuum pump 18. Start the heating device to heat the heating tube 19, and turn off the heating device after 12 hours. Open the valve to let in water vapor, and the water vapor enters from the steam pipeline 13. After 2 hours, the door 12 can be opened to take out the food rack 3. When taking out the food rack 3, it is necessary to start the motor 50 counterclockwise so that the pressure member 57 in the M direction applies pressure to the limit member 65, so that the second inclined section 75 here will not prevent the gear 60 from rotating.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A freeze-drying device capable of negative pressure sterilization, characterized in that: include: A freeze drying warehouse, wherein the interior of the freeze drying warehouse is hollowed out to form a freeze drying chamber, one end of the freeze drying chamber is opened to form an input port, a warehouse door is provided at the input port, a steam transmission pipeline is provided outside the freeze drying chamber, the steam transmission pipeline extends into the freeze drying chamber, a first pipeline is provided on the freeze drying warehouse, a vacuum pump is provided on the first pipeline, a heating pipe is further provided on the freeze drying warehouse, the heating pipe extends into the freeze drying chamber, a cooler is provided inside the freeze drying chamber, and the cooler is arranged at the lower end of the steam transmission pipeline, A plurality of mounting components are arranged on the inner wall of the freeze-drying chamber, the mounting components are arranged symmetrically, a mounting piece is arranged in the mounting component, the mounting piece is composed of a mounting rod, a vertical plate and a horizontal plate, the vertical plate is arranged on the mounting rod, the horizontal plate is arranged on the vertical plate, the horizontal plate is arranged perpendicular to the vertical plate, an extension portion is arranged on the horizontal plate, an extension hole is formed inside the extension portion, a disinfection hole is arranged in the middle of the horizontal plate, the disinfection hole is connected with the extension hole, a sealing plate is arranged at the lower end of the horizontal plate, sliding portions are arranged at both ends of the sealing plate, strip holes are arranged on the sliding portion, and a strip hole is arranged on the lower end surface of the horizontal plate A sliding groove matched with the sliding part, a groove is provided on the vertical plate, a first spring is provided in the sliding groove, one end of the first spring contacts the inner wall of the groove, and the other end contacts the sealing plate, a traction member is provided at one end of the sealing plate, a guide rod is provided in the groove, a transverse groove and a vertical groove are provided on the vertical plate, the transverse groove is vertically arranged with the vertical groove, a driving plate is provided on the vertical plate, a first rod body is provided at one end of the driving plate, and a second rod body is provided at the other end, the first rod body is placed in the vertical groove, and the second rod body is placed in the transverse groove, one end of the traction member is connected to the sealing plate, and the other end is connected to the first rod body, And a food rack placed in the freeze-drying chamber, wherein a fixing seat is provided at the upper end of the food rack, a symmetrical fixing plate is provided on the fixing seat, and symmetrical rollers are provided in the middle of the fixing plate, a mounting seat is provided on the inner wall of the freeze-drying chamber, a blocking portion is provided at the lower end of the mounting seat, a bearing plate cooperating with the roller is provided at the lower end of the blocking portion, the roller is arranged on the bearing plate, the blocking portion is arranged between the rollers, a guide block is provided on the food rack, the guide block is arranged on the outer wall of the food rack, the guide block is inserted between the sealing plate and the driving plate, and the guide block is used to push the driving plate to move in the horizontal groove and the vertical groove to keep the traction member pulling the sealing plate to seal the disinfection hole.

2. The freeze-drying device capable of negative pressure sterilization according to claim 1, characterized in that: A second spring is arranged in the vertical groove, a third spring is arranged in the transverse groove, the second spring is in contact with the first rod body, and the third spring is in contact with the second rod body.

3. The freeze-drying equipment capable of negative pressure sterilization according to claim 1, characterized in that: The disinfection hole is arranged obliquely. When the first rod body of the driving plate is at the upper end of the vertical groove and the second rod body is at one end close to the vertical groove, the driving plate is kept at the lower end of the disinfection hole, and the middle of the driving plate is located in the middle of the disinfection hole.

4. The freeze-drying equipment capable of negative pressure sterilization according to claim 1, characterized in that: The guide block is provided with a protrusion, the protrusion is provided with an arc head, the lower end of the protrusion is provided with a first plane, and the guide block is also provided with an inclined surface and a second plane, and the inclined surface connects the first plane and the second plane.

5. The freeze-drying equipment capable of negative pressure sterilization according to claim 1, characterized in that: A support plate is provided on the outer wall of the freeze-drying chamber, a motor is provided on the support plate, a rotating shaft is provided on the mounting rod, the rotating shaft is connected to the motor, a rotating wheel is provided at one end of the rotating shaft, and a rotating member is provided at the other end, the rotating member is located inside the freeze-drying chamber, the rotating wheel is located outside the freeze-drying chamber, and the rotating wheels are connected to each other by belts.

6. The freeze-drying equipment capable of negative pressure sterilization according to claim 5, characterized in that: The rotating member is provided with symmetrically arranged pushing blocks.

7. The freeze-drying equipment capable of negative pressure sterilization according to claim 6, characterized in that: The mounting rod is provided with a rotating shaft, the rotating shaft is provided with a gear, one side of the food rack is provided with a rack matched with the gear, the gear is provided with a first tooth, and the rack is provided with a second tooth matched with the first tooth.

8. The freeze-drying equipment capable of negative pressure sterilization according to claim 7, characterized in that: A symmetrical limiting assembly is provided on the mounting rod, wherein a limiting plate, a pressure member and a limiting member are provided in the limiting assembly, the limiting plate is connected to the mounting rod, the pressure member is composed of a cover body and a pressure rod, the interior of the cover body is hollowed out to form a limiting chamber, the limiting plate is provided with a through hole through which the pressure rod passes, the pressure rod is placed on the limiting member, a fourth spring is sleeved on the pressure rod, the upper end of the fourth spring is in contact with the cover body, and the lower end is placed on the limiting plate, a compression area is formed between the cover body and the limiting plate.

9. The freeze-drying equipment capable of negative pressure sterilization according to claim 8, characterized in that: The limiting member is composed of a mounting section, a connecting section, a first inclined section, a horizontal section and a second inclined section. The pressure rod is placed on the horizontal section, and the second inclined section is placed between the first teeth.

10. A method for operating a freeze-drying device capable of negative pressure sterilization, using the freeze-drying device of claim 1, characterized in that: The following steps are involved: Step 1, place the food to be processed on the food rack, start the motor, keep the motor rotating clockwise, drive the belt to rotate, rotate the rotating part, and apply pressure to the limit assembly far away from the input port through the push block to keep the fourth spring compressed; Step 2: The pressure rod applies pressure to the horizontal section on the limiter to keep the second inclined section separated from between the first teeth; Step 3, the food rack is placed on the mounting seat in the freeze-drying chamber, and the rack and gear on the food rack are used to move the food rack into the freeze-drying chamber; Step 4: The guide block on the food rack pushes the driving plate to move in the vertical groove and the horizontal groove, and the driving plate drives the traction member to pull the sealing plate to seal the disinfection hole; Step 5: Close the door and start the freeze-drying equipment.

Images