Rapid and efficient freeze dryer

Abstract

The invention relates to the technical field of freeze drying, and provides a quick and efficient freeze dryer which comprises a box body, the box body is provided with a drying chamber used for freeze drying of materials, the box body is provided with an opening communicating with the drying chamber, and the box body is provided with a box door for opening and closing the opening. The box body is located in the drying chamber and is provided with partition plates at intervals in the height direction of the drying chamber, and the multiple partition plates divide the drying chamber into multiple drying areas; the partition plate is made of metal with heat conductivity, a control mechanism for controlling the temperature of the partition plate is arranged in the box body, the control mechanism comprises a refrigerating assembly and a heating assembly, the box body is provided with a vacuum mechanism for vacuumizing the drying chamber, and the partition plate is detachably connected to the box body. The box body is provided with an adjusting assembly used for adjusting the distance between every two adjacent partition plates, and the partition plates are provided with material frames used for containing materials. The refrigerating machine has the beneficial effects that the material treatment efficiency and the space utilization rate in the refrigerating machine are improved.

Description

Technical Field

[0001] The present application relates to the technical field of freeze drying, and in particular to a fast and efficient freeze drying machine. Background Art

[0002] The working principle of the freeze dryer is to pre-cool the material containing a large amount of water into a solid, that is, freeze it to below the triple point temperature, and then sublime the solid water (ice) in the object directly into water vapor under vacuum conditions, remove it from the object, and make the object dry.

[0003] At present, freeze dryers generally include a refrigeration system, a vacuum system, a heating system and a drying chamber (water trap). After the material with moisture is placed on the partition in the drying chamber for pre-freezing for the required time, it is vacuumed and the temperature of the partition is controlled by the heating system for sublimation, so that the water that is cooled and frozen into a solid state directly sublimates into a gaseous state into water vapor.

[0004] The partitions of existing freeze dryers are generally composed of stainless steel plates and multiple steel pipes welded on the stainless steel plates. The multiple steel pipes are arranged side by side with no gap between two adjacent steel pipes. Refrigerant is input into the steel pipes, and the materials are dried by contacting the multiple steel pipes. Since the partitions are welded in the drying chamber, the number of partitions that can be used is limited, so that less materials can be placed on the partitions each time they are frozen, and the drying efficiency of the materials is relatively low. In addition, since the spacing between adjacent partitions is limited for materials of different heights, when placing materials, there is excess space between materials of different heights and the partitions, and the space utilization rate in the drying chamber is relatively low, which affects the drying efficiency of the materials, so further improvement is needed. Summary of the invention

[0005] In order to improve the processing efficiency of materials, the present application provides a fast and efficient freeze dryer.

[0006] The present application provides a fast and efficient freeze dryer, which adopts the following technical solution: A fast and efficient freeze dryer, comprising a box body, the box body is provided with a drying chamber for freeze drying materials, the box body is provided with an opening connected to the drying chamber, the box body is provided with a door for opening and closing the opening, the box body is located in the drying chamber and is provided with partitions at intervals along its height direction, and a plurality of partitions are used to divide the drying chamber into a plurality of drying areas; the partitions are made of metal with thermal conductivity, a control mechanism for controlling the temperature of the partitions is provided in the box body, the control mechanism includes a refrigeration component and a heating component, the box body is provided with a vacuum mechanism for evacuating the drying chamber; the partitions are detachably connected to the box body, the box body is provided with an adjustment component for adjusting the distance between adjacent partitions, and a There is a material rack for placing materials, and the material rack is also made of heat-conductive metal. A plurality of stacked material racks are arranged on one partition, and placement space for materials is reserved between adjacent material racks and between the partition and the material rack. The partition above the material rack abuts against the materials on the material rack; a placement box is arranged at the opening of the box body, and the placement box is rotatably connected to the box body on one side close to the opening, and the box body is provided with a limiter for limiting the rotation of the placement box, and the placement box is provided with a placement chamber connected to the drying chamber, and the placement chamber is used to place the stacked material racks, and the box door is a sliding door, and the placement box is provided with a pushing component to push the stacked material racks into the drying chamber.

[0007] By adopting the above technical scheme, partitions and material racks made of heat-conducting metal materials are provided. After the materials are placed on the material racks and partitions, the refrigeration component cools the partitions to conduct cold to the material racks and then freezes them. After reaching the required freezing state, the drying chamber is evacuated by the vacuum mechanism and then heated by the heating component. The boiling point of water will be lowered in the vacuum environment, so that the solid ice absorbs heat and sublimates into water vapor. As the vacuum mechanism extracts water vapor, the drying chamber is kept dry.

[0008] Among them, by arranging material racks between the partitions for placing materials, the selection of material racks is mainly based on the thickness of the material itself to select material racks of corresponding height. Compared with directly placing the material on the partition, the stacked material racks can place more materials, so as to improve the utilization rate of the space formed between the two partitions, reduce the possibility of waste of surplus space formed between two adjacent partitions, and increase the material processing capacity, that is, increase the amount of material processed in one freeze-drying operation.

[0009] If the spacing between the partitions is fixed, for stacked material racks, there may be a possibility of poor contact between the materials on the top material rack and the partitions. In this regard, by setting an adjustment component for adjusting the spacing between adjacent partitions in the box, the height between adjacent partitions can be adjusted according to the height of the stacked material racks to abut against the materials on the material racks, reducing the possibility of some poor contact, so as to further improve the space utilization in the drying room. And because the thickness of the material is different, the height of the material rack selected later is different. If there is too much stacking, the material on the material rack far away from the partition will take a relatively long time. In this regard, the number of material racks that can be stacked is limited, and some materials have different thicknesses. For this, the height of the stacked material rack will also be different. The utilization rate of the space formed between two adjacent partitions may be relatively low. In this regard, by setting an adjustment component for adjusting the spacing between two adjacent partitions, the spacing between the two partitions can be adjusted according to the height of the material racks after different stacking, reducing the possibility of waste of surplus space when placing material racks of different heights, so as to improve the utilization rate of the drying room with a fixed volume, and it can also be used to place more materials to increase the material processing capacity.

[0010] As the material rack conducts heat itself, the material on the material rack is also conducted heat. Due to the stacked material rack, although the freezing time required will increase with the increase in the number of materials, the overall processing efficiency is increased compared to the time spent on the same amount of material that needs to be separated several times for freezing and reheating, making the material processing relatively efficient and fast. And according to the thickness of the material, different heights of material racks are selected. Compared with directly adjusting the distance between two adjacent partitions through the adjustment component, since the partition is set in the drying room and needs to be opened for adjustment, it takes relatively more time, and the material rack can be stacked when the dryer is working to reduce the idle time of the dryer and improve the material processing efficiency.

[0011] Before freezing the material, the drying room needs to be pre-cooled by the refrigeration component to reach the required temperature, and then the material rack with the material is placed on the partition. Since the material rack is stacked, the operation time of placing it on the partition is longer, so that the opening is exposed to the outside world for a longer time, and the cold air in the drying room and the hotter air outside will exchange heat, and the water vapor in the hot air will be cooled and liquefied in the drying room, which will affect the temperature in the drying room and increase the freezing time of the material. Therefore, a placement room is provided for placing the material racks with stacked materials. After the temperature in the drying room reaches the requirement, the opening is opened by moving the combined door, and then the stacked material racks are pushed into the drying room by starting the pushing component to be placed on the partition. The placement box is isolated from the outside air to limit the flow range of cold air in the drying room, so as to reduce the loss and influence of cold air in the drying room. Since the side of the placement box close to the opening is rotatably connected to the box body, when pre-cooling is performed in the box, the material racks are first stacked in the placement box, and then the placement box is rotated to close the exposed opening of the placement box. The placement time in the drying room is reduced, thereby indirectly improving the processing efficiency of the materials, making the processing of the materials relatively efficient and fast, and can further improve the space utilization rate in the drying room.

[0012] Preferably, the material rack is provided with a plurality of through holes for the circulation of water vapor, the material and the through holes are staggered, and the through holes on adjacent material racks are staggered.

[0013] By adopting the above technical solution, through holes are opened on the material rack. Since the material and the through holes are staggered, and the through holes are also staggered, when the subsequent heating component is heated, the water vapor flows through the through holes and then flows from the gaps on the sides, so that when the vacuum mechanism is evacuating air, the flow of water vapor is accelerated, and the impact on the flow of water vapor when adjacent material racks abut against the material and the partition abut against the material is reduced.

[0014] In addition, a plurality of through holes are provided to increase the amount of material that can be placed, so as to further increase the placement area of ​​the material on the upper surface of the material rack, so as to indirectly improve the space utilization rate in the drying chamber and increase the material processing capacity.

[0015] Preferably, a placement plate for placing the material rack is provided in the placement chamber, and an adjustment component is also provided on the placement plate for adjustment. The number of the placement plates and the push plates corresponds to the number of the partitions. The push component includes a push plate abutting against a number of material racks, a screw rod passing through the lower end of the push plate, and a driving member driving the screw rod to rotate. The push plate is protrudingly provided with a first slider slidably connected to the placement plate, and the screw rod is threadedly passed through the first slider.

[0016] By adopting the above technical solution, the driving member is started to drive the screw to rotate. As the screw thread passes through the first slider, and the first slider is slidably connected to the placement plate, the pushing plate can slide along the width direction or length direction of the placement plate to push several material racks placed on the placement plate to slide toward the partition plate and be placed on the partition plate.

[0017] Compared with using a cylinder to push the material rack to move, using a screw rod and a driving member to push the material rack on the placement plate can reduce the space occupied in the placement room.

[0018] Preferably, the placement box is provided with connecting rods on opposite sides of the placement plate, the push plate is protrudingly provided with a ring slidably sleeved on the connecting rod, the placement plate is penetrated by a through groove for the connecting rod to pass through, and the length direction of the through groove is parallel to the width direction of the placement plate.

[0019] By adopting the above technical solution, a connecting rod is provided, and a ring is provided on the push plate to slide on the connecting rod, so as to adjust the height position of the placement plate, and the connecting rod can reduce the number of corresponding screw rods and driving members, so as to reduce the space occupied by the screw rods and driving members in the placement box, and reduce the corresponding cost. And it is convenient to increase, decrease and adjust the push plate according to the number of adjusted placement plates according to the needs.

[0020] Preferably, a second slide groove is provided on the upper surface of the partition, and a sliding bar that slides in the second slide groove is protruded from the bottom of the material rack near the upper surface of the partition, the length direction of the sliding bar is parallel to the width direction of the material rack, the length of the sliding bar is longer than the spacing between the placement plate and the partition, and a third slide groove that is slidably connected to the sliding bar is provided on the placement plate.

[0021] By adopting the above-mentioned technical solution, a sliding bar and a corresponding second sliding groove and a third sliding groove are provided to limit the sliding path of the material rack and reduce the possibility of sliding and detaching, so that the material rack can be placed on the partition more stably, and the length of the sliding bar is longer than the distance between the placement plate and the partition to reduce the possibility of jamming during the sliding process.

[0022] Preferably, the box body is provided with a cleaning assembly for cleaning the condensed frost on the partition, the cleaning assembly includes a cleaning plate abutting against the surface of the partition, the cleaning plate is slidably connected to the partition, and one end of the cleaning plate away from the partition is used to abut against the material rack.

[0023] By adopting the above technical solution, during the pre-cooling process in the drying room, the water vapor in the drying room will condense into frost on the partition. When the push plate pushes the material rack onto the partition, the condensed frost may affect the cooling and heat conduction effect of the partition on the material. Therefore, a cleaning plate is provided. When the push plate pushes the material rack onto the partition, the upper end of the cleaning plate can be pushed to approach the inner wall of the drying room. Since the cleaning plate is connected to the partition by sliding, the frost can be cleaned with the sliding of the material rack to reduce the content of condensed frost on the upper surface of the partition, so as to reduce the cooling or heat conduction time, so as to further improve the material processing efficiency. In addition, when cooling, the condensed frost is scraped in advance, so that the water vapor evaporated after the accumulated frost absorbs heat can be sucked by the vacuum mechanism during the subsequent heating.

[0024] Since the condensed frost has a certain thickness, if it is too thick, it may affect the subsequent utilization of the space in the drying room. In this regard, by providing a cleaning plate for cleaning the condensed frost, the space occupied by the condensed frost in the entire drying room can be reduced, thereby indirectly improving the space utilization in the drying room.

[0025] Preferably, second sliders are protruding from both ends of the cleaning plate, the partition plate is provided with a fourth slide groove for the second slider to slide and connect, and the cleaning assembly also includes a reset member for driving the cleaning plate to reset, and the reset member is installed in the fourth slide groove.

[0026] By adopting the above technical solution, when the pushing plate pushes the material rack into the drying chamber, it drives the cleaning plate to slide along the width direction of the partition to clean the frost condensed on the partition. When the material is freeze-dried, the material rack is slid away from the partition. The cleaning plate is acted upon by the resetting member to drive the resetting member to move toward the direction close to the opening to complete the resetting.

[0027] Preferably, the reset member includes a coil spring connected to one end of the cleaning plate and a rotating rod for winding the coil spring, the coil spring forces the cleaning plate to move toward the opening direction, one end of the coil spring away from the cleaning plate is fixedly connected to the rotating rod, and the rotating rod is installed on the inner wall of the fourth slide groove.

[0028] By adopting the above technical solution, by providing a coil spring, when the material rack is separated from the partition, the elastic force of the coil spring itself drives the partition to move toward the opening to reset for the next use, reducing the need for manual reset operations, and the partition can be cleaned twice, reducing the need for additional cleaning work. In addition, by providing a coil spring and a rotating rod, the cleaning plate is set on the partition, which is easy to install and implement, and can reduce the difficulty of implementation to achieve the desired effect.

[0029] Regarding the setting of the reset member, if it is driven by a screw rod and a driving motor, the space in the drying chamber may be occupied to some extent, thereby affecting the space utilization in the drying chamber. To this end, a coil spring and a rotating rod are used, and the reset member is arranged in the fourth slide groove, which can facilitate the reset of the cleaning plate while reducing the space occupied by the reset member in the drying chamber. In this way, the space occupied by other components in the drying chamber except for materials, partitions and material racks can be reduced, so that more materials can be placed in the drying chamber to improve the space utilization rate of the drying chamber.

[0030] In summary, this application has the following beneficial effects: 1. Material racks are provided between the partitions for placing materials. The selection of material racks is mainly based on the thickness of the material itself to select material racks of corresponding height. Compared with directly placing the material on the partition, the stacked material racks can hold more materials, and the utilization rate of the space formed between the two partitions is improved, reducing the possibility of waste of surplus space formed between two adjacent partitions, and increasing the material processing capacity, that is, increasing the amount of material processed in one freeze-drying operation.

[0031] 2. By providing an adjustment component for adjusting the distance between two adjacent partitions, the distance between the two partitions can be adjusted according to the height of the material racks after different stacking, reducing the possibility of waste of surplus space when placing material racks of different heights, thereby improving the utilization rate of the drying room with a fixed volume, and can also be used to place more materials to increase the material processing capacity.

[0032] 3. By providing a placement box, the outside air is isolated to limit the flow range of cold air in the drying room, so as to reduce the loss and impact of cold air in the drying room. Since the side of the placement box close to the opening is rotatably connected to the box body, when pre-cooling in the box, the material rack can be stacked in the placement box first, and then the placement box is rotated to close the exposed opening of the placement box. This can reduce the time spent on stacking on the partition, thereby indirectly improving the material processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the internal structure of the box body and the placement box in the embodiment of the present application; Figure 3 is a schematic diagram of the structure of the partition and the adjustment assembly in the embodiment of the present application; Figure 4 This is a schematic diagram of the internal structure of the placement box in the embodiment of the present application; Figure 5 This is a schematic diagram of the structure of the push plate in the embodiment of the present application; Figure 6 It is a schematic diagram of the structure of the cleaning component in the embodiment of the present application.

[0034] Explanation of the reference numerals: 1. Box body; 11. Drying chamber; 12. Opening; 13. Box door; 14. Adjustment assembly; 2. Partition; 21. Limit block; 22. Second slide; 23. Fourth slide; 3. Vacuum mechanism; 4. Material rack; 41. Through hole; 5. Placement box; 51. Limit member; 52. Placement chamber; 53. Placement plate; 531. First slide; 532. Third slide; 6. Push assembly; 61. Push plate; 611. Horizontal plate; 612. Vertical plate; 62. Screw rod; 63. Driving member; 64. First slider; 65. Connecting rod; 66. Through ring; 7. Cleaning assembly; 71. Cleaning plate; 711. Second slider; 72. Reset member; 721. Coil spring; 722. Turn rod. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 , further details of this application are given.

[0036] The embodiment of the present application discloses a fast and efficient freeze dryer.

[0037] Example: A fast and efficient freeze dryer, refer to Figure 1 , Figure 2 , including a box body 1, the box body 1 is provided with a drying chamber 11 for freeze-drying materials, the box body 1 is provided with an opening 12 connected to the drying chamber 11, and the box body 1 is provided with a door 13 for opening and closing the opening 12. In this embodiment, the door 13 is a sliding door to open and close the opening 12.

[0038] The box body 1 is located in the drying chamber 11 and is provided with a plurality of partitions 2 at intervals along its height direction. The plurality of partitions 2 are used to divide the drying chamber 11 into a plurality of drying areas. In this embodiment, three partitions 2 are specifically shown, and the partitions 2 are made of a metal with thermal conductivity, such as copper or aluminum. Among them, a control mechanism (not shown in the figure) for controlling the temperature of the partition 2 is provided in the box body 1. The control mechanism includes a refrigeration component and a heating component, and the box body 1 is provided with a vacuum mechanism 3 for evacuating the drying chamber 11. It should be noted that since the control mechanism and the vacuum mechanism 3 are both existing technologies, they will not be described in detail here.

[0039] Reference Figure 2 , Figure 3In this embodiment, the partition 2 is detachably connected to the box body 1, and the box body 1 is provided with an adjusting component 14 for adjusting the distance between adjacent partitions 2. The adjusting component 14 is specifically a partition bar fixedly connected to the opposite side walls of the drying chamber 11. The partition bar is also made of a heat-conductive metal. A plurality of partition bars are arranged at intervals along the height direction of the drying chamber 11. The partition 2 abuts against the upper surface of the partition bar, and the length direction of the partition bar is parallel to the width direction of the drying chamber 11. A limit block 21 is protruding from the lower surface of the partition 2 near the inner wall of the drying chamber 11. A limit groove is reserved between the partition bar and the inner wall of the drying chamber 11 for the limit block 21 to slide and insert. The limit block 21 abuts against the surfaces between the partition bar and the drying chamber 11 that are close to each other.

[0040] Reference Figure 2 , Figure 4 , a material rack 4 for placing materials is provided on the partition 2. The material rack 4 is also made of a metal with thermal conductivity, and can be made of the same material as the partition 2. In this embodiment, a plurality of through holes 41 for water vapor circulation are provided on the material rack 4. The materials and the through holes 41 are staggered, and the through holes 41 on adjacent material racks 4 are staggered. A plurality of stacked material racks 4 are provided on a partition 2. Specifically, according to the size of the materials and the height of the material rack 4, there is a placement space for placing materials between adjacent material racks 4 and between the partition 2 and the material rack 4. The partition 2 located above the material rack 4 abuts against the materials on the material rack 4 to achieve a heat conduction effect.

[0041] Furthermore, before freezing the material, it is necessary to pre-cool the drying chamber 11 through a refrigeration component to reach the required temperature, and then the material rack 4 with the material is placed on the partition 2. Since the material rack 4 is stacked, the operation time of placing it on the partition 2 is longer, so that the opening 12 is exposed to the outside world for a longer time, so that heat exchange will take place between the cold air in the drying chamber 11 and the hotter air outside, and the water vapor in the hot air will be cooled and liquefied in the drying chamber 11. After the material rack 4 is completely placed, it takes relatively more time, which will affect the temperature in the drying chamber 11, so that the freezing time of the material is also increased, affecting the corresponding work efficiency. In order to reduce the freezing time, in this embodiment, a placement box 5 is provided at the opening 12 of the box body 1. The side edge of the placement box 5 close to the opening 12 is rotatably connected to the box body 1, specifically through a hinge. The box body 1 is provided with a limit member 51 for limiting the rotation of the placement box 5. The limit member 51 is specifically a door lock handle. The door lock handle is specifically arranged on the side wall of the placement box 5 close to the opening 12 of the box body 1 to ensure the sealing inside the box.

[0042] Among them, a placement chamber 52 connected to the drying chamber 11 is opened on the surface of the placement box 5 close to the box body 1, and the placement chamber 52 is used to place the stacked material racks 4. A placement plate 53 for placing the material racks 4 is provided in the placement chamber 52, and an adjustment component 14 is also provided on the placement plate 53 for adjustment, which is the same as the adjustment method between the partitions 2.

[0043] In this embodiment, the placement box 5 is provided with a pushing component 6 for pushing the stacked material racks 4 into the drying chamber 11, so that when pre-cooling is performed in the box body 1, the material racks 4 are first stacked in the placement box 5, and then the placement box 5 is rotated to close the exposed opening 12 of the placement box 5. After the pre-cooling in the drying chamber 11 is completed, the sliding door is opened, and the pushing component 6 is started to push the material racks 4 into the drying chamber 11. This can reduce the time spent on stacking on the partition 2, thereby indirectly improving the material processing efficiency.

[0044] Reference Figure 4 , Figure 5 Specifically, the pushing assembly 6 includes a pushing plate 61 abutting against a plurality of material racks 4, a screw rod 62 passing through the lower end of the pushing plate 61, and a driving member 63 driving the screw rod 62 to rotate, wherein the pushing plate 61 specifically includes a horizontal plate 611 abutting against the upper surface of the placement plate 53 and a vertical plate 612 perpendicular to the horizontal plate 611, so that the pushing plate 61 is arranged in an L-shaped plate, and a first slider 64 is protruded from one end of the horizontal plate 611 away from the vertical plate 612. Two first sliders 64 are provided and are respectively arranged at both ends of the horizontal plate 611. A first slide groove 531 for sliding connection of the first slider 64 is opened on the upper surface of the placement plate 53. The length direction of the first slide groove 531 is parallel to the width direction of the placement plate 53, and the first slide groove 531 extends to the side wall of the placement plate 53 close to the opening 12.

[0045] The screw rod 62 is built into the first slide groove 531, the screw rod 62 is threaded through the first slider 64, two screw rods 62 are provided and are arranged near the opposite side walls of the placement plate 53, one end of the screw rod 62 away from the opening 12 is rotatably connected to the side wall of the first slide groove 531, and one end of the screw rod 62 away from the box body 1 extends into the placement chamber 52. In this embodiment, the driving member 63 is specifically a driving motor, which is fixedly connected to the inner wall of the placement chamber 52, and the driving motor is fixedly connected to the end of the screw rod 62 away from the opening 12.

[0046] For the connection of several push plates 61, in this embodiment, a connecting rod 65 is provided on the surface of the horizontal plate 611 away from the vertical plate 612, and two connecting rods 65 are provided and respectively provided at the two ends of the opposite side walls close to the horizontal plate 611. The horizontal plate 611 is protrudingly provided with a through ring 66 that is slidably sleeved on the connecting rod 65 to drive the sliding of several push plates 61. Among them, a through slot for the connecting rod 65 is opened through the inner bottom wall of the first slide groove 531, and the length direction of the through slot is parallel to the length direction of the first slide groove 531.

[0047] Reference Figure 2 , Figure 4 , wherein a second slide groove 22 is opened on the upper surface of the partition 2, and a sliding bar that slides on the second slide groove 22 is protruded from the bottom of the material rack 4 near the upper surface of the partition 2. The length direction of the sliding bar is parallel to the width direction of the material rack 4, and the length of the sliding bar is longer than the distance between the placement plate 53 and the partition 2. A third slide groove 532 is opened on the placement plate 53 to which the sliding bar is slidably connected.

[0048] Reference Figure 2 , Figure 6 Furthermore, during the precooling process in the drying chamber 11, the water vapor in the drying chamber 11 will condense into frost on the partition 2. When the push plate 61 pushes the material rack 4 onto the partition 2, the condensed frost may affect the cooling and heat conduction effects of the partition 2 on the material. In this embodiment, the box body 1 is provided with a cleaning assembly 7 for cleaning the condensed frost on the partition 2. The cleaning assembly 7 specifically includes a cleaning plate 71 abutting against the upper surface of the partition 2 and a reset member 72 for driving the cleaning plate 71 to reset, wherein the cleaning plate 71 is slidably connected to the partition 2, and the upper end of the cleaning plate 71 is used to abut against the material rack 4. The cleaning plate 71 is protrudingly provided with a second slider 711 at both ends, and the partition 2 is provided with a fourth slide groove 23 for the second slider 711 to be slidably connected, and the reset member 72 is installed in the fourth slide groove 23.

[0049] It should be noted that one partition 2 may be provided with one cleaning plate 71 or two cleaning plates 71. When one cleaning plate 71 is provided, it is specifically abutted against the upper surface of the partition 2. When two cleaning plates 71 are provided, the two cleaning plates 71 are respectively provided on the upper and lower surfaces of the partition 2.

[0050] The reset member 72 specifically includes a coil spring 721 connected to one end of the cleaning plate 71 and a rotating rod 722 for the coil spring 721 to be wound. In this embodiment, the coil spring 721 forces the cleaning plate 71 to move toward the opening 12. One end of the coil spring 721 away from the cleaning plate 71 is fixedly connected to the rotating rod 722, and the rotating rod 722 is installed on the inner wall of the fourth slide groove 23. It should be noted that the fourth slide groove 23 can be set as the same slide groove as the second slide groove 22. For this, it is necessary to open an installation groove for the reset member 72 on the bottom inner wall of the second slide groove 22 to avoid contact between the coil spring 721 and the sliding bar of the material rack 4, reduce the sliding effect on the material rack 4, but can further improve the space utilization in the drying chamber 11, and the specific setting is based on the needs.

[0051] The implementation principle of a fast and efficient freeze dryer in the embodiment of the present application is as follows: first, the drying chamber 11 is precooled by the refrigeration component, and then the material rack 4 with the placed materials is stacked on the placement plate 53. After placement, the placement box 5 is closed by the limiter 51. After the precooling in the drying chamber 11 is completed, the sliding door is opened, and the pushing component 6 is started to push the material rack 4 into the drying chamber 11. This can reduce the time spent on stacking on the partition 2, thereby indirectly improving the processing efficiency of the material. When the material reaches the required frozen state, the drying chamber 11 is then evacuated by the vacuum mechanism 3, and then heated by the heating component. In a vacuum environment, the boiling point of water will be reduced, so that the solid ice absorbs heat and sublimates into water vapor, so that the vacuum mechanism 3 extracts water vapor to keep the drying chamber 11 dry.

[0052] The placement box 5 is isolated from the outside air to limit the flow range of the cold air in the drying chamber 11, so as to reduce the loss and influence of the cold air in the drying chamber 11. Since the side of the placement box 5 close to the opening 12 is rotatably connected to the box body 1, when pre-cooling is performed in the box body 1, the material rack 4 is first stacked in the placement box 5, and then the placement box 5 is rotated to close the exposed opening 12 of the placement box 5. This can reduce the time spent on stacking on the partition 2, thereby indirectly improving the material processing efficiency.

[0053] For the above-mentioned examples, the following experiments were conducted. Experimental application example 1: Experimental content: There are three layers of partitions 2, and three layers of material racks 4 are placed on each layer of partitions 2. Each layer of material rack 4 is placed with one layer of material. The material is placed in the placement chamber 52 before entering the freeze dryer. The temperature in the drying chamber 11 is first made to reach -80°C ultra-low temperature refrigerator for pre-freezing for 3 hours. After pre-freezing, the pushing component 6 in the placement box 5 is used to place the material rack 4 in the drying chamber 11 to start sublimation drying and analytical drying, and the condensed frost on the partition 2 is cleaned by the cleaning component 7.

[0054] It should be noted that in this experimental application example, the experimental freeze-dried material used can be yogurt or rice noodles, specifically yogurt, 300 grams of material is placed on each layer of the material rack 4, a single layer of the partition 2 has a total of 900 grams of material, a single batch of freeze-dried material has a total of 2700 grams, and the water content of the material is 85%-90%. Experimental Application Example 2: The difference from Experimental Application Example 1 is that no cleaning component 7 is provided in Experimental Application Example 2.

[0055] Experimental Application Example 3: The difference from Experimental Application Example 1 is that in Experimental Application Example 3, the placement box 5 and the cleaning component 7 are not provided. After pre-freezing for 3 hours, the box door 13 on the drying chamber 11 is directly opened, and the material rack 4 with the materials is placed in the drying chamber 11.

[0056] Experimental Application Example 4: The difference from Experimental Application Example 1 is that in Experimental Application Example 4, the placement box 5 and the cleaning component 7 are not provided, and only one layer of material is placed on a layer of partition 2, and the same 2700 grams of material is freeze-dried three times.

[0057] Under the same temperature control and vacuum degree of the corresponding temperature box for drying operation, the test was carried out according to the method of the embodiment and the comparative example, and then three tests were carried out to count the time spent on drying the corresponding weight of the material spent in the test and the energy consumption generated. The final statistics are shown in Table 1 below, and the average time spent in the three experiments plus the pre-freezing time and the average energy consumption are shown in Table 2 below: Table 1 - Experimental results record Experimental application example 1 Experimental application example 2 Experimental application example 3 Experimental application example 4 time consuming 76.37 76.73 79.5 45.3 Total energy consumption 107.3 108.67 116.3 64 Table 2 - Average experimental results record From the above experimental application examples 1-4, it can be seen from the table that in experimental application example 2, the time and energy consumption spent on freeze drying without the cleaning component 7 are increased relative to experimental application example 1, but the increase is not much. However, in experimental application example 3, when the placement box 5 is not provided, the time spent is relatively increased, the time spent is increased by about 3h, and the energy consumption generated is about 10 kWh. For experimental application example 4, the total time spent for three times is 135.9h, and the total energy consumption is 192, which is too large compared with the embodiment and comparative examples 1-2. In this regard, the test of experimental application example 1 according to this embodiment can greatly improve the utilization rate of the equipment and reduce the freezing time and energy consumption.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A fast and efficient freeze dryer, comprising a housing (1), the housing (1) being provided with a drying chamber (11) for freeze drying materials, the housing (1) being provided with an opening (12) connected to the drying chamber (11), the housing (1) being provided with a door (13) for opening and closing the opening (12), the housing (1) being located in the drying chamber (11) and having partitions (2) arranged at intervals along its height direction, the plurality of partitions (2) being used to divide the drying chamber (11) into a plurality of drying zones; the partitions (2) being made of a metal having thermal conductivity, the housing (1) being provided with a control mechanism for controlling the temperature of the partitions (2), the control mechanism comprising a refrigeration component and a heating component, the housing (1) being provided with a vacuum mechanism (3) for evacuating the drying chamber (11); the characteristics are as follows: The partition (2) is detachably connected to the box body (1), and the box body (1) is provided with an adjustment component (14) for adjusting the distance between adjacent partitions (2). A material rack (4) for placing materials is provided on the partition (2), and the material rack (4) is also made of a heat-conductive metal. A plurality of stacked material racks (4) are provided on one partition (2), and a placement space for placing materials is reserved between adjacent material racks (4) and between the partition (2) and the material rack (4), and the partition (2) located above the material rack (4) abuts against the materials on the material rack (4); The box body (1) is provided with a placement box (5) at the opening (12); a side edge of the placement box (5) close to the opening (12) is rotatably connected to the box body (1); and the box body (1) is provided with a limiter (51) for limiting the rotation of the placement box (5); the placement box (5) is provided with a placement chamber (52) connected to the drying chamber (11); the placement chamber (52) is used for placing stacked material racks (4); the box door (13) is a sliding door; and the placement box (5) is provided with a pushing component (6) for pushing the stacked material racks (4) into the drying chamber (11).

2. A fast and efficient freeze dryer according to claim 1, characterized in that: The material rack (4) is provided with a plurality of through holes (41) for the circulation of water vapor, the material and the through holes (41) are staggered, and the through holes (41) on adjacent material racks (4) are staggered.

3. A fast and efficient freeze dryer according to claim 1, characterized in that: A placement plate (53) for placing the material rack (4) is arranged in the placement chamber (52), and an adjustment assembly (14) is also arranged on the placement plate (53) for adjustment. The number of the placement plates (53) and the push plates (61) are arranged corresponding to the number of the partitions (2). The push assembly (6) comprises a push plate (61) abutting against a plurality of material racks (4), a screw rod (62) passing through the lower end of the push plate (61), and a driving member (63) driving the screw rod (62) to rotate. The push plate (61) is protrudingly provided with a first slider (64) slidably connected to the placement plate (53), and the screw rod (62) is threadedly passed through the first slider (64).

4. A fast and efficient freeze dryer according to claim 3, characterized in that: The placement box (5) is provided with connecting rods (65) on two opposite sides of the placement plate (53); the push plate (61) is protrudingly provided with a ring (66) slidably sleeved on the connecting rod (65); the placement plate (53) is penetrated by a through slot for the connecting rod (65) to pass through; the length direction of the through slot is parallel to the width direction of the placement plate (53).

5. A fast and efficient freeze dryer according to claim 3, characterized in that: A second slide groove (22) is provided on the upper surface of the partition (2); a sliding bar that slides on the second slide groove (22) is protruded from the bottom of the material rack (4) near the upper surface of the partition (2); the length direction of the sliding bar is parallel to the width direction of the material rack (4); the length of the sliding bar is longer than the distance between the placement plate (53) and the partition (2); and a third slide groove (532) is provided on the placement plate (53) to which the sliding bar is slidably connected.

6. A fast and efficient freeze dryer according to claim 3, characterized in that: The box body (1) is provided with a cleaning component (7) for cleaning the condensed frost on the partition (2), and the cleaning component (7) comprises a cleaning plate (71) abutting against the surface of the partition (2), the cleaning plate (71) being slidably connected to the partition (2), and an end of the cleaning plate (71) away from the partition (2) being used for abutting against the material rack (4).

7. A fast and efficient freeze dryer according to claim 6, characterized in that: The cleaning plate (71) is provided with second sliding blocks (711) protruding from both ends thereof, the partition plate (2) is provided with a fourth sliding groove (23) for the second sliding block (711) to be slidably connected thereto, the cleaning assembly (7) further comprising a reset member (72) for driving the cleaning plate (71) to reset, the reset member (72) being installed in the fourth sliding groove (23).

8. A fast and efficient freeze dryer according to claim 7, characterized in that: The reset member (72) comprises a coil spring (721) connected to one end of the cleaning plate (71) and a rotating rod (722) for the coil spring (721) to be wound around, the coil spring (721) forces the cleaning plate (71) to move towards the opening (12), one end of the coil spring (721) away from the cleaning plate (71) is fixedly connected to the rotating rod (722), and the rotating rod (722) is mounted on the inner wall of the fourth slide groove (23).

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