A vacuum freeze dryer

Abstract

The present invention belongs to the technical field of drying devices, and discloses a vacuum freeze drying machine, including a machine body and a freeze drying chamber, wherein at least two stacked trays for placing articles are inserted and assembled in the freeze drying chamber, and in the two adjacent trays, the left and right sides of the tray at the bottom are respectively provided with a push rod assembly for lifting and retracting the tray at the top, and the push rod assembly includes two sliders slidably assembled on the trays and a first connecting rod and a second connecting rod respectively hinged on the two sliders, and the first connecting rod and the second connecting rod are hinged; the left and right walls of the freeze drying chamber are respectively provided with a push piece corresponding to the slider one by one for pushing the slider to move in the front and rear directions, and a driving assembly is also provided in the freeze drying chamber, and the driving assembly is used to drive the two push pieces on the same side to move closer to or away from each other. The present invention has the effect of facilitating the staff to take and put articles and improving the freeze drying efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, and in particular to a vacuum freeze dryer. Background Art

[0002] A vacuum freeze dryer, also known as a freeze dryer or freeze dryer, is a device used to freeze and vacuum dehydrate a substance to maintain its structure, appearance and nutrients. Its working principle mainly includes freezing, vacuuming, sublimation and condensation. Vacuum freeze dryers are widely used in food, medicine, biotechnology and other fields. Vacuum freeze dryers can effectively maintain the shape, color, nutrients and active ingredients of substances.

[0003] A Chinese patent document with authorization announcement number CN116753702B discloses a freeze-drying device, which includes a freezing chamber, a cold drying unit, a motor and a rack. A cold storage room is provided inside the freezing chamber. The cold drying unit is used to transport cold air to the cold storage room. The motor is used to drive the columns in the cold storage room to rotate. A plurality of groups of racks that can rotate with the columns are provided in the cold storage room. The racks are used to store items. There is a cold air flow space between the top of the rack and the top wall of the cold storage room. Upper and lower corresponding sealing plates and door bodies are provided on the side walls of the freezing chamber. When in use, two groups of racks are reserved for not storing items.

[0004] With respect to the above-mentioned related technologies, when placing items on the shelves, it is necessary to open the door body to place the items on the shelves, and then make the driving motor drive the shelves to rotate, so as to place the items on multiple shelves, and then the motor drives the shelves to rotate, and transfers the shelves to the corresponding areas for freeze drying. When the items need to be taken out, it is also necessary to open each door body to take out the items. When the number of items is large, the process of taking and placing the items is more complicated, which is not conducive to taking and placing the items. When the number of items is small, the utilization rate of the device is low. Summary of the invention

[0005] In view of this, the present invention provides a vacuum freeze dryer, aiming to solve the problems of complicated taking and placing process of the drying device and low device utilization rate in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a vacuum freeze dryer, comprising a machine body and a freeze drying chamber arranged inside the machine body, wherein at least two stacked storage trays for placing articles are inserted and installed in the freeze drying chamber, and the left and right sides of the lower storage tray of two adjacent storage trays are respectively provided with a push rod assembly for lifting and retracting the upper storage tray, and the push rod assembly comprises two sliders slidably mounted on the storage trays and a first connecting rod and a second connecting rod respectively hinged on the two sliders, and the first connecting rod and the second connecting rod are hinged;

[0007] The left and right walls of the freeze-drying chamber are respectively provided with pushing parts corresponding to the slider one by one and used to push the slider to move in the front and rear directions. The freeze-drying chamber is also provided with a driving assembly that is transmission-connected to the two pushing parts on the same side, and the driving assembly is used to drive the two pushing parts on the same side to move closer to or away from each other.

[0008] By adopting the above technical scheme, when it is necessary to take or place items, the items are first placed in the storage tray, and the number of storage trays is selected according to the number of items, and then the stacked storage trays are placed in the freeze-drying chamber. By first placing the items evenly in the storage trays and then placing the stacked storage trays in the freeze-drying chamber, it is convenient for staff to load the items, and the push members are driven to approach each other by the driving assembly, and the push members abut against the slider during the movement, and the slider drives the first connecting rod and the second connecting rod to rotate so that the other ends of the first connecting rod and the second connecting rod lift the upper storage tray, so that there is a certain gap between each storage tray, so as to facilitate freeze-drying of the items, which is beneficial to improve work efficiency; after the items are freeze-dried, the push members are moved away from each other, the first connecting rod and the second connecting rod rotate, and the storage trays slowly fall to the bottom of the freeze-drying chamber under the action of their own gravity, so that it is convenient for staff to take out the items.

[0009] Optionally, the driving assembly includes a rotating source fixedly mounted on the outer wall of the freeze-drying chamber, the driving shaft of the rotating source is fixedly connected with a bidirectional screw, the bidirectional screw extends in the front-to-back direction, and two threaded rod sections of the bidirectional screw with opposite rotation directions are respectively threaded with sliding blocks, the sliding blocks slide with the pushing piece in the left-right direction, and the left and right walls of the freeze-drying chamber are respectively provided with accommodating grooves for accommodating corresponding pushing pieces, and one side groove wall of the accommodating groove is used to guide the pushing piece to slide out of the accommodating groove so that the pushing piece pushes the corresponding sliding block.

[0010] By adopting the above technical solution, the setting of the bidirectional screw can drive the two sliding blocks to move towards or away from each other. In the process of the two sliding blocks approaching each other, the pushing member is driven to move along the inclined guide wall, so that the pushing member can push the sliding block to move, so as to separate the storage tray in the subsequent process. In the process of the two sliding blocks moving away from each other, the pushing member is driven to reset, and under the action of the tension spring, the pushing member is returned to the initial position along the inclined guide wall, so that the pushing member does not affect the movement of the sliding block during the process of taking out the storage tray.

[0011] Optionally, the pushing member includes a vertical plate and a movable block connected to the vertical plate, the movable block has a sliding hole that slides with the sliding block, the sliding block has an inner cavity, and the inner cavity is provided with a tension spring connected to the vertical plate, and the left and right walls of the freeze-drying chamber are respectively provided with avoidance grooves for the corresponding movable blocks to slide.

[0012] By adopting the above technical solution, when the pushing member needs to return to the accommodating groove, when the pushing member moves to the inclined guide wall, the vertical plate returns to the accommodating groove along the inclined guide wall under the action of the tension spring, so as to facilitate the removal of the storage tray.

[0013] Optionally, the storage tray includes a tray body and a top plate arranged at the bottom of the tray body, and the left and right sides of the tray body are respectively provided with adjustment grooves, and a movable plate is movably assembled in the adjusting groove along the left and right directions, and a supporting screw is threadedly connected to the groove wall of the adjusting groove, and the supporting screw includes a threaded portion and a smooth rod portion, and the movable plate is slidably connected to the smooth rod portion of the supporting screw, and the movable plate is provided with a pushing inclined surface, and the top plate is provided with a pushing inclined surface cooperating with the pushing inclined surface, and a plurality of through holes are provided on the tray body, and a plurality of top blocks cooperating with the through holes are fixedly connected to the upper surface of the top plate.

[0014] By adopting the above technical solution, when the movable plate moves toward the placement tray, the pushing inclined surface and the pushed inclined surface cooperate with each other to move the top plate up. As the top plate moves, the top block enters the through hole, and then lifts the object to make it separate from the surface of the placement tray, thereby reducing the probability of the object sticking to the placement tray and facilitating the unloading of the object. At the same time, space is formed between the object and the placement tray, which is conducive to air circulation and facilitates freeze-drying of the object.

[0015] Optionally, a linear drive member is provided on the left and right walls of the freeze-drying chamber respectively, and a driving shaft of the linear drive member is fixedly connected to a pressing plate abutting against the movable plate, and the pressing plate extends in the up-down direction.

[0016] By adopting the above technical solution, the setting of the linear drive member can drive the pressure plate to move, thereby driving the pressure plate to abut the movable plate and push the movable plate to move. The setting of the pressure plate can push multiple movable plates to move at the same time, which is conducive to improving work efficiency.

[0017] Optionally, a return spring is connected between the movable plate and the groove wall of the adjusting groove.

[0018] By adopting the above technical solution, when the pressure plate returns to its initial state, the return spring can drive the movable plate to move, thereby moving the top plate downward, so as to facilitate the subsequent collection of items on the storage tray.

[0019] Optionally, the lower portion of the top block is cylindrical, and the upper portion of the top block is conical.

[0020] By adopting the above technical solution, the top of the top block is configured to be conical, which is conducive to lifting the items on the storage tray.

[0021] Optionally, support blocks for limiting the first connecting rod and the second connecting rod are fixedly connected to the left and right sides of the storage tray respectively.

[0022] By adopting the above technical solution, the setting of the support block can support the end of the first connecting rod and the second connecting rod away from the slider, which can reduce the impact between the first connecting rod and the second connecting rod, and can directly lift the upper storage tray during the upward movement to facilitate separating the storage tray, which is conducive to improving work efficiency.

[0023] Optionally, refrigeration pipes are respectively provided on the left and right walls of the freeze-drying chamber, and a vacuum pump is installed between the freeze-drying chamber and the machine body.

[0024] By adopting the above technical solution, the arrangement of the vacuum pump and the refrigeration tube is conducive to freeze-drying of items.

[0025] Optionally, a door is hinged on the front side wall of the body, and a handle slidably connected to the door is slidably connected to the body.

[0026] By adopting the above technical solution, the arrangement of the handle facilitates the opening and closing of the door.

[0027] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0028] 1. When it is necessary to take or place items, the number of storage trays is selected according to the number of items, and then the items are placed in the storage trays and the stacked storage trays are placed in the freeze-drying chamber. The items are evenly placed in the storage trays first, and then multiple storage trays are placed in the freeze-drying chamber together, which is convenient for workers to take or place items. The driving assembly drives the push members to approach each other, and the push members abut against the slider during the movement. The slider drives the first connecting rod and the second connecting rod to rotate. The ends of the first connecting rod and the second connecting rod away from the slider can lift the upper storage tray, so that there is a certain gap between each storage tray, so as to facilitate freeze drying of the items, thereby facilitating the improvement of work efficiency.

[0029] 2. The support block can support the ends of the first connecting rod and the second connecting rod away from the slider, which can reduce the impact between the first connecting rod and the second connecting rod, and can directly lift the upper storage tray during the upward movement, so as to separate the storage tray, which is conducive to improving work efficiency;

[0030] 3. When the movable plate moves toward the placement tray, the top plate can move up with the cooperation of the pushing inclined surface and the pushed inclined surface. As the top plate moves, the top block enters the through hole, and then lifts the items to separate them from the surface of the placement tray, reducing the probability of the items sticking to the placement tray, which is beneficial to the unloading of the items. At the same time, space is formed between the items and the placement tray, which is beneficial to the circulation of air and facilitates the freeze-drying of the items. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a structural schematic diagram of the freeze-drying chamber in the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the accommodating groove in the present invention;

[0034] Figure 4 It is a schematic diagram of the structure in which the first connecting rod and the second connecting rod are folded on the storage tray;

[0035] Figure 5 for Figure 4 A partial enlarged view of the middle area A;

[0036] Figure 6 It is a schematic diagram of the structure in which the first connecting rod and the second connecting rod are spread apart according to an embodiment of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of the bidirectional screw and the sliding block assembly in the present invention;

[0038] Figure 8 for Figure 7 A partial enlarged view of the middle area C;

[0039] Fig. 9 It is a schematic diagram of the structure of the top plate and the top block assembly in the present invention;

[0040] Fig.10 for Fig. 9 A partial enlarged view of area B in the middle.

[0041] Explanation of the reference numerals: 1. body; 11. freeze-drying chamber; 12. push member; 121. vertical plate; 122. movable block; 123. avoidance groove; 13. storage tray; 131. tray body; 132. accommodating groove; 133. adjusting groove; 14. push rod assembly; 15. slider; 16. first connecting rod; 17. second connecting rod; 18. support block; 2. drive assembly; 21. rotation source; 22. bidirectional screw; 23. sliding block; 24. inclined guide wall; 25. tension spring; 26. accommodating groove; 31. supporting screw; 32. movable plate; 321. push inclined surface; 33. reset spring; 34. through hole; 35. top plate; 351. push inclined surface; 36. top block; 4. linear drive member; 41. pressure plate; 5. mounting groove; 51. refrigeration pipe; 52. vacuum pump; 6. hatch; 61. handle. DETAILED DESCRIPTION

[0042] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 10, the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0043] Reference Figure 1 and Figure 2 A vacuum freeze dryer includes a body 1, a freeze drying chamber 11 arranged inside the body 1, a plurality of stacked storage trays 13 arranged in the freeze drying chamber 11, a vacuum pump 52 arranged between the freeze drying chamber 11 and the body 1, and a hatch 6 hinged on the body 1.

[0044] Reference Figure 1 The body 1 is placed on a horizontal plane, and a handle 61 is mounted between the door 6 and the body 1 for horizontal sliding, so that the door 6 can be opened to facilitate placing items into the freeze-drying chamber 11.

[0045] Reference Figure 2 and Figure 3 The freeze drying chamber 11 is used to freeze-dry items. The freeze drying chamber 11 is in the shape of a rectangular parallelepiped. In this embodiment, for the convenience of description, the length direction of the freeze drying chamber 11 is defined as the front-to-back direction, the width direction of the freeze drying chamber 11 is the left-to-right direction, and the height direction of the freeze drying chamber 11 is the up-and-down direction. The freeze drying chamber 11 has a left side wall, a right side wall and a rear side wall. Mounting grooves 5 are respectively provided on the left and right walls of the freeze drying chamber 11. A refrigeration pipe 51 is installed in the mounting groove 5. The refrigeration pipe 51 can perform a freezing operation on the freeze drying chamber 11. A vacuum pump 52 installed on the inner wall of the body 1 is provided between the body 1 and the freeze drying chamber 11. The vacuum pump 52 is used to form a vacuum environment in the freeze drying chamber 11. The refrigeration pipe 51 and the vacuum pump 52 are well known to those skilled in the art and will not be described in detail herein.

[0046] Reference Figure 2 , Figure 4 , Figure 5 and Figure 6, there are three storage trays 13, and the number of storage trays 13 can be set according to the number of items, and is not limited to three in this embodiment. In order to separate the storage trays 13 and facilitate freeze-drying of items, the left and right sides of the two lower storage trays 13 are respectively provided with a push rod assembly 14 for lifting and retracting the upper storage tray 13, and the push rod assembly 14 includes two sliders 15 slidably assembled on the storage trays 13 and a first connecting rod 16 and a second connecting rod 17 respectively hinged on the two sliders 15, the first connecting rod 16 is hinged to the middle of the second connecting rod 17, and the ends of the first connecting rod 16 and the second connecting rod 17 away from the slider 15 are free ends, and the two sliders 15 can drive the first connecting rod 16 and the second connecting rod 17 to rotate when they are close to each other. When the first connecting rod 16 and the second connecting rod 17 rotate, the ends of the first connecting rod 16 and the second connecting rod 17 away from the slider 15 move upward, so that the upper storage tray 13 can be lifted up, so that a uniform gap is formed between the middle storage tray 13 and the storage trays 13 above and below it, so as to facilitate freeze-drying of items; a support block 18 is fixedly connected to the side wall of the storage tray 13 for limiting the ends of the first connecting rod 16 and the second connecting rod 17 away from the slider 15. When the first connecting rod 16 and the second connecting rod 17 are retracted on the storage tray 13, the ends of the first connecting rod 16 and the second connecting rod 17 away from the slider 15 abut against the upper surface of the support block 18.

[0047] Reference Figure 2 , Figure 3 , Figure 7 and Figure 8 In order to facilitate the movement of the slider 15, a pushing piece 12 is vertically arranged on the left and right walls of the freeze-drying chamber 11, and the pushing piece 12 includes a vertical plate 121 and a movable block 122 connected to the vertical plate 121. In order not to affect the placement and removal of the placement plate 13, a receiving groove 26 for accommodating the corresponding vertical plate 121 is respectively opened on the left and right walls of the freeze-drying chamber 11, and one side wall of the receiving groove 26 is set as an inclined guide wall 24, so that the vertical plate 121 can be pulled out of the receiving groove 26 along the inclined guide wall 24, so that the vertical plate 121 can abut and push the slider 15; in order to facilitate the sliding of the movable block 122, an avoidance groove 123 for the corresponding movable block 122 to slide is also opened on the left and right walls of the freeze-drying chamber 11.

[0048] Reference Figure 2 , Figure 3 , Figure 7 and Figure 8The outer wall of the freeze-drying chamber 11 is provided with a driving assembly 2 for driving the two push members 12 on the left and right walls of the freeze-drying chamber 11 to move closer to each other or away from each other. The driving assembly 2 includes a rotation source 21, a bidirectional screw 22 and a sliding block 23; the rotation source 21 is fixedly installed on the left and right sides of the freeze-drying chamber 11, the bidirectional screw 22 is fixedly connected to the driving shaft of the rotation source 21, and the bidirectional screw 22 extends in the front-back direction, and the sliding block 23 is threadedly connected to two thread segments of the bidirectional screw 22 with opposite rotation directions. When the bidirectional screw 22 rotates, the corresponding two sliding blocks 23 can move closer to each other or away from each other. In order to facilitate the push member 12 to return to the accommodating groove 26, the movable block 122 has a sliding hole that slides with the sliding block 23, and the sliding block 23 has an inner cavity, and a tension spring 25 connected to the vertical plate 121 is provided in the inner cavity. The tension spring 25 can always provide a pulling force to the vertical plate 121, so that the vertical plate 121 moves against the inner wall of the freeze-drying chamber 11.

[0049] Reference Figure 4 , Figure 5 , Fig. 9 and Fig.10 The storage tray 13 includes a tray body 131 and a top plate 35 disposed at the bottom of the tray body 131; the tray body 131 is rectangular, and in order to facilitate the storage of items, a receiving groove 132 for placing items is opened on the top of the tray body 131, and the depth of the receiving groove 132 can be set according to the type of items. A plurality of through holes 34 (attached) are evenly opened on the tray body 131 Figure 4 The part shown in the figure is through the hole 34), and the left and right sides of the disk body 131 are respectively provided with adjustment grooves 133, and a movable plate 32 is movably assembled in the adjustment groove 133 along the left and right directions. In order to support the movable plate 32, a supporting screw 31 is threadedly connected to the groove wall of the adjustment groove 133, and the supporting screw 31 has a screw portion and a smooth rod portion, and the smooth rod portion of the supporting screw 31 is arranged through the movable plate 32, and a pushing inclined surface 321 is provided on the movable plate 32, and a pushing inclined surface 351 abutting against the pushing inclined surface 321 of the movable plate 32 is provided on the top plate 35. When the movable plate 32 moves in a direction close to the adjustment groove 133, the top plate 35 can move up under the action of the pushing inclined surface 321 and the pushing inclined surface 351, and when the movable plate 32 moves in a direction away from the adjustment groove 133, the top plate 35 can move down under the action of the pushing inclined surface 321 and the pushing inclined surface 351.

[0050] Reference Figure 2 and Fig.10 In order to facilitate the movement of the movable plate 32, linear drive members 4 are respectively installed on the left and right walls outside the freeze-drying chamber 11. In this embodiment, the linear drive member 4 is a cylinder, and in other embodiments, it can also be a hydraulic cylinder, an electric push rod or other drive members; the driving shaft of the linear drive member 4 is connected to a vertically arranged pressing plate 41, and when the pressing plate 41 moves, it can abut against the movable plate 32 and push the movable plate 32 to move.

[0051] Reference Fig. 9 and Fig.10 The top plate 35 is rectangular, and a plurality of top blocks 36 (attached Fig. 9 The top block 36 is partially shown in the figure. The upper part of the top block 36 is set to be conical, and the lower part of the top block 36 is set to be cylindrical. When the top plate 35 moves upward, the top block 36 can enter the through hole 34 (see the attached Figure 4 ), so that the items on the tray body 131 can be lifted up, thereby reducing the probability of the items sticking to the storage tray 13, and a certain gap can be formed between the items and the storage tray 13, which is beneficial to the freeze-drying of the items.

[0052] The implementation principle of a vacuum freeze dryer according to an embodiment of the present invention is as follows: first, a suitable number of storage trays 13 are selected according to the number of articles, and the articles are evenly laid on the tray body 131; after the hatch 6 is opened, a plurality of storage trays 13 are placed in the freeze drying chamber 11; then, the rotation source 21 is started to drive the bidirectional screw 22 to rotate; the sliding block 23 drives the vertical plate 121 and the movable block 122 to move together; under the sliding cooperation between the movable block 122 and the sliding block 23, the vertical plate 121 passes over the inclined guide wall 24, and then abuts against the slider 15, and pushes the slider 15 to move; as the slider 15 moves, the first connecting rod 16 and the second connecting rod 17 rotate; then the other ends of the first connecting rod 16 and the second connecting rod 17 push the upper storage tray 13 to move, thereby forming an even distribution between each storage tray 13. The lifting plate 35 is lifted up by the action of the pushing inclined surface 321 and the pushed inclined surface 351. During the upward movement of the top plate 35, the top block 36 is driven to enter through the through hole 34 and lift the objects, so as to reduce the probability of the objects sticking to the tray body 131. Then, the objects are freeze-dried in the freeze-drying chamber 11. After the objects are freeze-dried, the pushing member 12 and the pressing plate 41 are reset. The storage tray 13 slowly falls down under the action of its own gravity. The mobile plate 32 is reset under the action of the reset spring 33. The top plate 35 moves down. Finally, the hatch 6 is opened, the storage tray 13 is taken out and the objects are collected.

[0053] By selecting the number of placement trays 13 according to the number of articles, the placement trays 13 with placed articles are placed together in the freeze-drying chamber 11, and multiple placement trays 13 are taken out together after freeze-drying, thereby reducing the steps of taking and placing articles, which is beneficial to improving work efficiency; by forming a uniform gap between the multiple placement trays 13, it is beneficial to freeze-drying of articles; by lifting up the articles on the tray body 131, not only the probability of the articles sticking to the tray body 131 can be reduced, but also a certain gap is formed between the articles and the tray body 131, which is beneficial to freeze-drying of the articles.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vacuum freeze dryer, comprising a body and a freeze drying chamber arranged inside the body, characterized in that: At least two stacked trays for placing items are inserted and installed in the freeze-drying chamber. Among the two adjacent trays, the left and right sides of the tray at the bottom are respectively provided with a push rod assembly for lifting and retracting the tray at the top. The push rod assembly includes two sliders slidably mounted on the trays and a first connecting rod and a second connecting rod respectively hinged on the two sliders. The first connecting rod and the second connecting rod are hinged. The left and right walls of the freeze-drying chamber are respectively provided with push pieces corresponding to the slider one by one and used to push the slider to move in the front-back direction. The freeze-drying chamber is also provided with a driving assembly that is transmission-connected to the two push pieces on the same side, and the driving assembly is used to drive the two push pieces on the same side to move toward or away from each other; The storage tray comprises a tray body and a top plate arranged at the bottom of the tray body, the left and right sides of the tray body are respectively provided with adjustment grooves, a movable plate is movably assembled in the adjusting groove along the left and right directions, a supporting screw is threadedly connected to the groove wall of the adjusting groove, the supporting screw comprises a threaded portion and a smooth rod portion, the movable plate is slidably connected to the smooth rod portion of the supporting screw, the movable plate is provided with a pushing inclined surface, the top plate is provided with a pushing inclined surface matching the pushing inclined surface, a plurality of through holes are provided on the tray body, and a plurality of top blocks matching the through holes are fixedly connected to the upper surface of the top plate.

2. A vacuum freeze dryer according to claim 1, characterized in that: The driving assembly includes a rotating source fixedly installed on the outer wall of the freeze-drying chamber, the driving shaft of the rotating source is fixedly connected with a bidirectional screw, the bidirectional screw extends in the front-to-back direction, and two threaded rod sections of the bidirectional screw with opposite rotation directions are respectively threadedly connected with sliding blocks, the sliding blocks slide with the pushing piece in the left-right direction, and the left and right walls of the freeze-drying chamber are respectively provided with accommodating grooves for accommodating corresponding pushing pieces, and one side groove wall of the accommodating groove is an inclined guide wall for guiding the pushing piece to slide out of the accommodating groove so that the pushing piece pushes the corresponding sliding block.

3. A vacuum freeze dryer according to claim 1, characterized in that: The push member includes a vertical plate and a movable block connected to the vertical plate, the movable block has a sliding hole that slides with the sliding block, the sliding block has an inner cavity, and a tension spring connected to the vertical plate is arranged in the inner cavity. The left and right walls of the freeze-drying chamber are respectively provided with avoidance grooves for the corresponding movable blocks to slide.

4. A vacuum freeze dryer according to claim 1, characterized in that: A linear drive member is respectively provided on the left and right walls of the freeze-drying chamber, and a driving shaft of the linear drive member is fixedly connected to a pressing plate abutting against the moving plate, and the pressing plate extends in the up-down direction.

5. A vacuum freeze dryer according to claim 1, characterized in that: A return spring is connected between the moving plate and the groove wall of the adjusting groove.

6. A vacuum freeze dryer according to claim 1, characterized in that: The lower part of the top block is cylindrical, and the upper part of the top block is conical.

7. A vacuum freeze dryer according to claim 1, characterized in that: The left and right sides of the storage tray are respectively fixedly connected with support blocks for limiting the first connecting rod and the second connecting rod.

8. A vacuum freeze dryer according to claim 1, characterized in that: Refrigeration pipes are respectively arranged on the left and right walls of the freeze-drying chamber, and a vacuum pump is installed between the freeze-drying chamber and the machine body.

9. A vacuum freeze dryer according to claim 1, characterized in that: A door is hinged on the front side wall of the machine body, and a handle slidably connected to the machine body is slidably connected to the door.

Images