Freeze dryer with uniform heat transfer of plate layers

Abstract

The freeze dryer comprises a drying box, a laterally-opened box door, a plate layer assembly and a mounting part used for bearing the plate layer assembly, the mounting part is rotatably arranged, and a limiting piece used for increasing the rotating resistance of the mounting part is arranged at the horizontal position; a plurality of mounting parts are arranged at intervals up and down to form a row of mounting racks, the mounting racks are arranged in multiple rows, and a connecting part is arranged between every two adjacent rows of mounting racks; when the box door is closed, the connecting part moves upwards or downwards, so that the two adjacent rows of mounting frames are inclined towards the moving direction of the connecting part; when the number of the connecting parts is larger than one, every two adjacent connecting parts move in different directions. After the plate layer assembly is inclined, water vapor is not gathered, sublimation rates of samples at different positions are similar, it can be guaranteed that freeze-drying degrees of freeze-dried samples of the same batch are similar, good uniformity is achieved, and then the quality of freeze-dried products is improved.

Description

Technical Field

[0001] The present application relates to the technical field of freeze dryers, and in particular to a freeze dryer with uniform heat transfer in plate layers. Background Art

[0002] A freeze dryer is a mechanical device that uses vacuum freeze drying technology to produce freeze-dried products. Vacuum freeze drying technology is currently used in a wide range of fields such as medicine, biological products, food, blood products, and active substances. Freeze drying is a drying technology that uses the principle of sublimation. It is a process in which the dried material is quickly frozen at low temperatures, and then in an appropriate vacuum environment, the frozen water molecules are directly sublimated into water vapor and escape.

[0003] At present, in the production of freeze dryers, for the sake of efficiency, multiple plate layer assemblies are usually set up inside the freeze dryer for holding samples. Multiple plate layer assemblies are arranged up and down. The plate layer assemblies located on the top are easy to block the gaseous water produced by the sublimation of the samples in the plate layer assemblies below, so that the gaseous water below is restricted from being discharged and gathered. After gathering, the surrounding water vapor increases, which will further affect the sublimation of nearby samples. The samples located in the top plate layer assembly are less restricted, so the uniformity of the products after freeze drying in different plate layer assemblies is poor. Many products, such as medicines, do not need to be absolutely dry during production, and relatively speaking, uniformity is more critical. To this end, we propose a freeze dryer with uniform plate heat transfer, which aims to solve the problem of poor uniformity of products after freeze drying. Summary of the invention

[0004] The purpose of the present application is to provide a freeze dryer with uniform heat transfer in the plate layer.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a freeze dryer with uniform plate layer heat transfer, comprising a drying box, a side-opening box door, a plate layer assembly and a mounting part for supporting the plate layer assembly, wherein the mounting part can be rotatably arranged, and a limit piece for increasing the rotation resistance of the mounting part is provided in a horizontal position; the mounting part is spaced apart from each other up and down to form a row of mounting frames, the mounting frames are arranged in multiple rows, and a connecting part is provided between two adjacent rows of the mounting frames; when the box door is closed, the connecting part moves up or down so that the two adjacent rows of the mounting frames are tilted toward the moving direction of the connecting part; when the number of the connecting parts exceeds one, the two adjacent connecting parts move in different directions.

[0006] Preferably, the box door is provided with a transmission part, and the transmission part and the box door move in coordination. When the box door is opened, the transmission part is located at an initial position, at which time the connecting part is in an initial state and the mounting frame is kept in a horizontal state by the limiting member; when the box door is closed, the transmission part moves with the box door, and the transmission part acts to cause the connecting part to move up or down as the box door is closed.

[0007] As a preferred embodiment, the transmission part is slidably arranged at the bottom of the inner cavity of the drying box, and the transmission part is correspondingly arranged with the connecting part, a guide structure is formed between the transmission part and the connecting part, and the transmission part moves with the closing of the box door, and when moving, the transmission part acts on the connecting part through the guide structure to make the connecting part move up or down; the transmission part includes a rod body slidably arranged at the bottom of the inner cavity of the drying box and one or more guide parts arranged on the rod body; the connection between the rod body and the guide part has a smooth transition, and the same number of rod bodies are correspondingly arranged for a plurality of the connecting parts, and the bottoms of two adjacent connecting parts correspond to each other in sequence The rod body and the guide part are adjacent to the two transmission parts, and the initial heights of the two adjacent connecting parts are consistent. After the box door acts on the transmission part to move, the bottoms of the two adjacent connecting parts correspond to the guide parts and the rod bodies of the two adjacent transmission parts in sequence. The bottom of the connecting part initially acts on the rod body and finally acts on the guide part to move upward, and the bottom of the connecting part initially acts on the guide part and finally acts on the rod body to move downward; the rod body is provided with a reset spring, and the reset spring keeps the rod body in a position close to the box door in the initial state. When the box door is closed, the rod body moves and compresses the reset spring.

[0008] Preferably, the bottom of the connecting part is a roller, a slot is provided in the middle of the roller surface of the roller, the width of the rod body and the guide part is correspondingly equal to or less than the width of the slot, and the slot abuts against the rod body or the guide part; more than two guide parts are provided, and the connecting part is provided with the same number of abutment points as the guide part; guide surfaces are provided on both sides of the guide part.

[0009] Preferably, each of the connecting parts is provided with a motor, and the motor is controlled by an electronic control system; when the box door starts to close, the corresponding motor is turned on and drives the corresponding connecting part to move up or down.

[0010] Preferably, the mounting frames are arranged in three or more rows, and correspondingly, the number of the connecting parts is one less than the number of the mounting frames; the connecting parts are arranged as columnar structures, and connecting rods are arranged between the connecting parts and the corresponding mounting frames, and the connecting rods, the connecting parts and the corresponding mounting parts are all hingedly connected; when the box door is closed, one of the connecting parts moves up, and one or two of the connecting parts adjacent to it moves down through the driving of the connecting rod, so that all the mounting frames form an inclined arrangement configuration of down-up-down-up or up-down-up-down.

[0011] Preferably, a vacuum pipeline is provided between two adjacent rows of the mounting frames and at the top of the inner cavity of the drying box, a small hole is provided upward or downward of the vacuum pipeline between two adjacent rows of the mounting parts with corresponding numbers, the vacuum pipeline is provided with a suction channel, the suction channel is connected to the vacuum pump of the freeze dryer, and the small hole is communicated with the suction channel.

[0012] As a preferred embodiment, all the mounting parts in two adjacent rows of mounting racks correspond to each other one by one, and after closing the door, the mounting parts are tilted and form an inclined arrangement configuration of up-down or up-down; between two mounting parts in the same row of the mounting racks in two adjacent rows, when the water vapor moving out from the corresponding two sides meet, the initial velocities of the two sides in the horizontal direction are completely or partially offset, so that the water vapor on both sides rise vertically.

[0013] As a preferred embodiment, all the mounting parts in two adjacent columns of the mounting frames are staggered one by one, and after the box door is closed, the mounting parts are tilted, and multiple mounting parts in the same row form a wave structure, and among the multiple connecting parts of the same wave structure, the lower end of the connecting part in the middle is lower than the lowest end of the mounting parts in another corresponding adjacent column, and the higher end of the connecting part in the middle is lower than the highest end of the mounting parts in another corresponding adjacent column; among the three adjacent connecting parts in the same row, the heights of the first and third mounting parts are the same and both are higher than the second mounting part.

[0014] As a preferred embodiment, the plate layer assembly includes an upper panel, a lower panel, a deflection baffle and a sealing plate, the upper panel and the lower panel are spaced apart, a plurality of deflection baffles are provided and are connected end to end between the upper panel and the lower panel, a plurality of the deflection baffles form an internal circulation airflow channel, and the sealing plate is used to seal between the outer deflection baffles, the upper panel and the lower panel, so that the inlet and outlet of the airflow channel are located on the same side.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] In this embodiment, the connecting part is arranged so that when the box door is closed, the connecting part moves up or down, thereby causing the corresponding two adjacent columns of mounting parts to tilt simultaneously toward the moving direction of the middle connecting part, so that the mounting parts of the two adjacent columns are tilted in opposite directions. The inclined structure formed can effectively increase the freeze-drying efficiency of the samples in the plate layer assembly installed on the mounting part compared to the horizontal placement of the mounting part in the prior art. On the other hand, the orderly inclined structure allows the gaseous water generated by sublimation to pass through the upper plate layer at an angle, so that it will not be blocked by the upper mounting part and the plate layer assembly, thereby allowing the gaseous water to be more promptly extracted by the vacuum pump arranged above. Since the gaseous water will not gather, the sublimation process will not be further slowed down, thereby further improving the freeze-drying efficiency. In this embodiment, after the plate layer assembly is tilted, since the water vapor does not gather, the sublimation rates of samples located at different positions in the drying box are similar, thereby ensuring to a certain extent that the freeze-drying degree of the freeze-dried samples of the same batch is similar, so that the freeze-dried samples have better uniformity, which helps to improve the quality of the freeze-dried products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0018] Figure 2 yes Figure 1 A cross-sectional view of the local structure of the drying box.

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the mounting frame.

[0020] Figure 4 yes Figure 3 Schematic diagram of the structure after tilting.

[0021] Figure 5 yes Figure 2 Schematic diagram after adding vacuum pipeline.

[0022] Figure 6 It is a schematic diagram of the structure of the mounting frame in another arrangement form.

[0023] Figure 7 yes Figure 6 Front view of the structure.

[0024] Figure 8 yes Figure 6 Schematic diagram of the structure after tilting.

[0025] Fig. 9 yes Figure 6 Stereoscopic images of the structure at two different viewing angles after tilting.

[0026] Fig.10This is a schematic diagram of the mounting frame after the vacuum pipeline is added.

[0027] Fig.11 yes Fig.10 Schematic diagram of the mounting frame after tilting.

[0028] Fig.12 It is a structural schematic diagram of an embodiment of a transmission part and a connecting part.

[0029] Fig.13 yes Fig.12 Another state diagram of .

[0030] Fig.14 It is a structural schematic diagram of an embodiment of a plate layer assembly in the present application.

[0031] Fig.15 yes Fig.14 Flow diagram inside the midplane assembly.

[0032] In the figure: 1. drying box; 2. vacuum pipe; 21. pipeline connecting port; 3. processing area; 4. installation part; 5. connection part; 51. first connection part; 52. second connection part; 6. connecting rod; 61. first connecting rod; 62. second connecting rod; 7. limit block; 71. first limit block; 72. second limit block; 8. transmission part; 9. rotating shaft; 10. mounting frame; 11. vacuum pipeline; 11a. main pipeline; 11b. auxiliary pipeline; 12. side groove; 13. mounting groove; 14. roller; 15. guide part; 16. rod body; 17. upper panel; 18. deflection baffle; 19. lower panel; 20. sealing plate. DETAILED DESCRIPTION

[0033] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0035] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0036] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0037] Embodiment 1:

[0038] Reference Figures 1 to 15 As shown, this embodiment proposes a freeze dryer with uniform plate heat transfer, including a drying box 1, a side-opening box door, a plate assembly, and a mounting portion 4 for carrying the plate assembly. The drying box 1 can generally be provided with a pipeline connection port 21 and a vacuum pipe 2 at the top, and the vacuum pipe 2 can be connected to a vacuum pump to facilitate vacuuming inside the drying box 1; the vacuum pump can be arranged at the bottom of the drying box 1 or in a processing area 3 next to the drying box 1, and the processing area 3 can also be provided with accessories such as a condenser.

[0039] The mounting portion 4 can be rotatably arranged, and a stopper is provided in a horizontal position for increasing the rotation resistance of the mounting portion 4; the mounting portion 4 is spaced apart from each other to form a row of mounting racks 10, and the mounting racks 10 are arranged in multiple rows, and a connecting portion 5 is provided between two adjacent rows of mounting racks 10; when the chamber door is closed, the connecting portion 5 is moved up or down so that the two adjacent rows of mounting racks 10 are tilted in the moving direction of the connecting portion 5; when the number of connecting portions 5 exceeds one, the two adjacent connecting portions 5 move in different directions. On the one hand, the tilting of the connecting portion 5 can drive the plate layer assembly to tilt, so that the samples placed on the plate layer assembly have a better contact space. On the other hand, the tilting of the floor layer assembly makes it easier for the sublimated water vapor to evaporate, which is conducive to the vacuum pump to extract the water vapor in the drying chamber. In this embodiment, the connecting portion 5 makes the plate layer assemblies on the two rows of mounting racks 10 connected thereto tilt in the moving direction thereof at the same time. When the mounting racks 10 are the same, the tilting angles of the two rows of mounting racks 10 on both sides are also the same when the connecting portion 5 moves, so the two rows of mounting racks 10 are arranged regularly when arranged accordingly.

[0040] When the number of the above-mentioned connecting parts 5 exceeds one, the number of mounting racks 10 exceeds two rows. Since two adjacent connecting parts 5 move in different directions, it is obvious that the three rows of mounting racks 10 corresponding to these two connecting parts 5 will be arranged in a wave shape such as up-down-up-down (i.e. ↘↗↘) or up-down-up (i.e. ↗↘↗). In order to ensure efficiency during production, generally not only one plate layer assembly is provided in the freeze dryer, so multiple rows are formed up and down and multiple columns are formed left and right to make full use of the internal space of the drying box 1. When the mounting racks 10 are all arranged horizontally and spaced by multiple layers, the gaseous water generated by the samples placed in the plate layer assemblies located in the middle during sublimation is shielded by the corresponding floor layer assemblies upward and downward. When the vacuum pump extracts the water vapor inside the drying box 1, it is limited by the extraction speed of the vacuum pump, and more water vapor accumulates between the plate layers in the middle of the drying box 1. However, even in a negative pressure environment, the higher the concentration of water vapor in the environment, the more unfavorable it is for the continued generation of water vapor, that is, the accumulation of water vapor is likely to affect the actual sublimation rate, thereby prolonging the freeze-drying time. In this case, the water vapor accumulated in the middle of the plate layer affects the sublimation, while the samples in the top plate layer assembly are less affected. At this time, the freeze-drying effect of the top sample is good, while the freeze-drying effect of the middle sample is poor, so that the dryness of the samples varies due to different sublimation degrees after freeze-drying. When all the plate layer components are tilted toward one side, the water vapor in the inner cavity of the drying box 1 tends to move in the same direction due to the guiding effect of the plate layer components and the vacuum pump, so that the water vapor tends to accumulate in the same direction of the drying box 1. Although it is alleviated compared with the horizontally placed plate layer components, the drying effect still has great limitations. In this case, due to the inclination between the plate layer components, the water vapor can move in the direction of vacuuming (the top of the drying box 1 in this embodiment refers to the attached figure), and the gaseous water at the top of the drying box 1 increases instead. Therefore, although it has certain advantages compared to the non-tilted placement, it still has great limitations. It is worth mentioning that the vacuum port of the freeze dryer described in this embodiment is set at the top of the drying box 1, and the water vapor is obtained by heating and sublimation, so the water vapor in the drying box 1 has an upward movement trend by default.

[0041] Therefore, when only two rows of plate layer components are arranged in this embodiment, the two rows of mounting frames 10 (correspondingly, the two rows of plate layer components) are tilted in the direction of movement of the middle connecting portion 5. At this time, the tilting directions of the two are: (1) down and up (i.e. ↘↗). In this tilting direction, taking the left plate layer component as an example, when the sample on the left plate layer component produces gaseous water, the water generally moves in two directions perpendicular to the direction of the plate layer component and along the direction of the plate layer component. For this reason, the gaseous water sublimated from the left plate layer component moves toward the upper left and upper right directions, and correspondingly, the gaseous water sublimated from the right plate layer component moves toward the upper right and upper left directions. At this time, the position between the two plate layer components is also the middle position of the drying box 1. Therefore, the sublimation formed when the lower is arranged in this way The uniform flow of gaseous water helps reduce the situation where the sublimation rate is affected by the accumulation of some water vapor. This also ensures that the sublimation degree of the samples set in each plate component is more consistent, which helps to form samples with better consistency. For example, in drug production, better consistency represents higher medicinal value. The same batch of drugs will not have a large difference in efficacy due to different evaporation degrees of the drugs; (2) up and down (i.e. ↗↘), the flow of gaseous water generated by the sublimation of the sample in the plate component on the left is to the upper left (perpendicular to the plate component) and the upper right (along the direction of the plate component), and the flow of gaseous water generated by the sublimation of the sample in the plate component on the right is to the upper right (perpendicular to the plate component) and the upper left (along the direction of the plate component), so the actual effect is similar to the first type (1). In the above two inclined setting schemes, the channel located in the middle obviously gathers the water vapor of the two plate layer components. The water vapor on both sides interact with each other when they meet. If the inclination angles of the water vapor on both sides are consistent and the water vapor movement speed is consistent, then when the water vapor on both sides intersect, the horizontal speeds of the two sides can offset each other, so that all the water vapor moves upward, thereby ensuring that the water vapor is emitted upward, preventing the water vapor on both sides from passing through the middle area to reach the top of the other plate layer component and accumulating. Of course, it is difficult to ensure that the water vapor speed on both sides is consistent in actual operation, but in general, the horizontal movement can offset each other, so that the water vapor here rises normally, which is sufficient for normal production process.

[0042] In this embodiment, the connecting part 5 is arranged, and when the box door is closed, the connecting part 5 moves up or down, thereby causing the corresponding two adjacent columns of mounting parts 4 to tilt simultaneously toward the moving direction of the middle connecting part 5, so that the mounting parts 4 of the two adjacent columns are tilted in opposite directions. The formed tilted structure can effectively increase the freeze-drying efficiency of the sample in the plate layer assembly installed on the mounting part 4 compared with the horizontal placement of the mounting part 4 (or the plate layer assembly after installation) in the prior art. On the other hand, the orderly tilted structure allows the gaseous water generated by sublimation to pass through the upper plate layer obliquely. , so that it will not be blocked by the upper mounting portion 4 and the plate layer assembly, so that the gaseous water can be more promptly extracted by the vacuum pump arranged above, and since the gaseous water will not gather, the sublimation process will not be further slowed down, thereby further improving the freeze-drying efficiency; in this embodiment, after the plate layer assembly is tilted, since the water vapor (gaseous water) does not gather, the sublimation rates of samples located at different positions in the drying box 1 are similar, thereby ensuring to a certain extent that the freeze-drying degrees of the freeze-dried samples of the same batch are similar, so that the freeze-dried samples have better uniformity, which helps to improve the quality of the freeze-dried products.

[0043] In this embodiment, by the inclined setting of the mounting portion 4 and the different inclined directions of two adjacent rows of mounting racks 10, the water vapor at the position between the two adjacent rows of mounting racks 10 can offset each other's horizontal movement, or the water vapor generated in the mounting portion 4 of one row of mounting racks 10 is blocked by the bottom surface of the mounting portion 4 of another adjacent row of mounting racks 10 when it moves upward, thereby ensuring that the water vapor can rise relatively vertically and try not to enter the top surface of other mounting portions 4, preventing the water vapor from gathering and affecting the sublimation of samples in other plate layer components. In fact, the influence of water vapor gathering on the sublimation of samples in the plate layer components can also be regarded as a negative impact on the uniformity of heat transfer of the plate layer. This embodiment can solve this problem by using a specifically inclined mounting portion and plate layer component, thereby ensuring the freeze-drying efficiency while ensuring the uniformity of freeze-dried products at different positions.

[0044] The limiting member can be realized by adopting a common damping structure.

[0045] Embodiment 2:

[0046] Based on Example 1, further, in order to solve the problem of how to drive the transmission part 8 to move so that the transmission part 8 drives the connecting part 5 to move in coordination at an appropriate time, this example provides two possible implementation plans.

[0047] The first solution: the door is provided with a transmission part 8, and the transmission part 8 and the door move in coordination. When the door is opened, the transmission part 8 is located at the initial position, at which time the connection part 5 is in the initial state and the mounting frame 10 is in the horizontal state. When the door is closed, the transmission part 8 moves accordingly, and at the same time, the connection part 5 moves up or down as the door is closed. In this embodiment, the transmission part 8 is activated by the opening and closing of the door, so that the connection part 5 moves and resets when the door is closed and opened, respectively, so that the mounting frame 10 can be automatically tilted when the door is closed, and the mounting frame 10 can be automatically reset when the door is opened. When the door is opened, it is generally to take and discharge materials. At this time, the tilting of the mounting frame 10 will make the process of taking and discharging materials cumbersome. Therefore, it is best to ensure that the mounting frame 10 is in the horizontal state when the door is opened, and when the door is closed, it is generally a freeze-drying process, which requires the plate layer assembly to be tilted. Therefore, the transmission part 8 acts on the connecting part 5 to tilt the mounting frame 10.

[0048] Furthermore, the transmission part 8 is arranged at the bottom of the inner cavity of the drying box 1, and the transmission part 8 is arranged corresponding to the connecting part 5, and the transmission part 8 and the connecting part 5 form a guiding structure. When the transmission part 8 is closed with the box door, the transmission part 8 acts on the connecting part 5 through the guiding structure to move the connecting part 5 up or down; the transmission part 8 includes a rod body 16 sliding on the bottom of the inner cavity of the drying box 1 and a guiding part 15 arranged on the rod body 16; the connection between the rod body 16 and the guiding part 15 has a smooth transition, and multiple connecting parts 5 are correspondingly provided with the same number of rod bodies 16 and guide parts 15, and the multiple connecting parts 5 correspond to different parts of the transmission part 8 in turn, and when the box door acts on the transmission part 8 to move, the multiple connecting parts 5 change the parts acting on the transmission part 8 in turn, so that the multiple connecting parts 5 move up and down in turn. In the initial state, no matter the bottom of the connecting part 5 acts on the rod body 16 or the guide part 15, the connecting part 5 will keep the corresponding connected mounting part 4 in a horizontal state. When the door is closed, the connecting part 5 starts to abut the rod body 16 at the bottom, and when the guide part 15 gradually abuts the connecting part 5 during movement, the connecting part 5 rises; and the connecting part 5 starts to abut the guide part 15 at the bottom, and gradually abuts the rod body 16 when the door is closed, so this part of the connecting part 5 falls. The rise or fall of the above-mentioned connecting part 5 only requires one stroke to be realized, so it only needs to act on the transmission part 8 to slide when the door is closed, and the implementation method is simple. In order to ensure that the corresponding transmission part 8 can be reset when the door is opened, a reset spring can be set between the rod body 16 and the inner wall of the drying box 1. The reset spring is compressed when the door is closed, and reset when the door is opened.

[0049] The second solution: each connection part 5 is provided with a motor, and the motor is controlled by an electric control system; when the door starts to close, the corresponding motor is turned on and drives the corresponding connection part 5 to move up or down. By setting the motor and controlling it through the electric control system, the operation is simpler in actual use, and the principle is easy to understand. Therefore, this solution will not be described in detail and is selectively used as an optional solution.

[0050] Embodiment 3:

[0051] Based on Example 1 or Example 2, this example proposes a preferred implementation scheme of the mounting portion 4, which can be referred to Figures 3 to 9 .

[0052] The middle part of the mounting portion 4 is hinged and fixed, and the middle part is set as a rotating shaft 9. The position of the rotating shaft 9 is fixed and can be fixed in the inner cavity of the drying box 1. The mounting portion 4 rotates around the hinge position, and the other end of the mounting portion 4 can be hingedly mounted between a connecting rod 6 and a transmission portion 8.

[0053] In order to reduce the resistance when the transmission part 8 and the connecting part 5 are in action, the bottom of the connecting part 5 is a roller 14, and a groove is provided in the middle of the roller surface of the roller 14. The widths of the rod body 16 and the guide part 15 are correspondingly equal to or less than the width of the groove, and the groove abuts against the rod body 16 or the guide part 15; the guide part 15 is provided with more than two, and the corresponding connecting part 5 is provided with the same number of abutment points as the guide part 15 to increase stability during action.

[0054] Embodiment 4:

[0055] Based on Example 3, the above example specifically describes the specific tilting scheme and effect of the corresponding floor layer components when the mounting frames 10 are arranged in two rows. Obviously, the mounting frames 10 can be arranged in greater numbers, and additional technical effects can be obtained by arranging the mounting frames 10 in additional rows based on the two rows.

[0056] The mounting racks 10 are provided in three or more rows, and the number of the connecting portions 5 is correspondingly one less than the number of the mounting racks 10. For ease of understanding, this embodiment is described by taking the number of the mounting racks 10 in three rows as an example. Figures 2 to 11 The corresponding content.

[0057] The connecting part 5 is configured as a columnar structure, and a connecting rod 6 is hingedly provided between the connecting part 5 and the corresponding mounting frame 10. Referring to the attached drawings, both ends of the connecting rod 6 are hingedly installed. When the door is closed, one of the connecting parts 5 moves up, and one or two connecting parts 5 adjacent to it moves down (only one side of the mounting part 4 located at the edge is connected to the connecting part 5, while both sides of the mounting part 4 located in the middle are connected to the connecting part 5), so that all the mounting frames 10 form an inclined arrangement configuration of up and down (i.e. ↘↗↘) or up and down (i.e. ↗↘↗), so that all the mounting parts 4 in each horizontal row form a wave shape, and all the mounting parts 4 in all horizontal rows located in the up and down directions have the same inclination state. Referring to Figure 3 , Figure 4 The connection part 5 can be limited by the limit block 7, so that the connection part 5 can slide up and down. Figure 4 When tilted, it can be seen that the first limit block 71 and the second limit block 72 have the same height. A mounting groove 13 is provided on the side of the connecting portion 5. The side of the limit block 7 is inserted into the mounting groove 13, so that the connecting portion 5 can only move up and down. At the same time, it can be seen that when tilted, the first connecting rod 61 is tilted upward, and the second connecting rod 62 is tilted downward. Of course, Figure 4 Except for the second connecting rod 62 in the first row, the second connecting rod 62 in the second row is shown horizontally. It can be seen that the second connecting rod 62 at this time cannot be connected to the mounting part 4 in the second column. Therefore, the two ends of the connecting rod 6 are respectively hingedly connected to the mounting part 4 and the connecting part 5.

[0058] In addition, if Figure 6 As shown, both ends of the mounting portion 4 are provided with side grooves 12, and a cylindrical rod can be installed in the side grooves 12 and thereby articulated with the connecting rod 6. Figure 7 As shown, Figure 7 After the middle tilt, the first connection part 51 moves downward, and the second connection part 52 moves upward, but the two limit blocks 7 are at the same height.

[0059] In order to facilitate the extraction of water vapor, a small hole is provided in the vacuum pipeline 11 at the position above or below the connection of the mounting part 4 between two adjacent rows of mounting frames 10, and a suction channel is provided in the middle of the connecting part 5. The suction channel is connected to the vacuum pump of the freeze dryer, and the small hole is communicated with the suction channel. Fig.10 As shown, in fact, a vacuum pipeline 11 is arranged at the top of the inner cavity of the drying box 1. The vacuum pipeline 11 includes a main pipeline 11a opened at the top and a sub-pipeline 11b extending downward. The suction channel connects the main pipeline 11a and the sub-pipeline 11b as well as the channel of the external vacuum pump. The small holes here are mainly arranged on the sub-pipeline 11b near the mounting portion 4, so as to facilitate the extraction of water vapor in the middle. Fig.10 and Fig.11As shown, in this embodiment, since the mounting part 4 and the plate layer assembly will tilt after the door is closed, and the mounting part 4 installed by the rotating shaft 9 will change its end position and orientation after tilting, it is inappropriate to set the small hole directly corresponding to the initial position of the mounting part 4. For this reason, in this embodiment, the position of the small hole is set below the initial position of each mounting part 4. In this way, after the door is closed, the end of the mounting part 4 can be close to the small hole after tilting. When the initial height difference between the small hole and the end of the mounting part 4 is set well, it can be ensured that after the mounting part 4 is tilted, its extension line directly corresponds to the small hole or is located a little below the small hole, which is conducive to water vapor extraction.

[0060] The above embodiment does not limit whether the overall heights of the mounting racks 10 in two adjacent rows are consistent, but since they are all mounting racks 10, the spacing between the mounting portions 4 contained in all mounting racks 10 should be consistent. Since the specific configurations produced after tilting when two adjacent mounting racks 10 are arranged at different heights are slightly different, the above embodiment does not specifically limit this, and two preferred arrangement schemes are proposed below.

[0061] First, all the mounting parts 4 in two adjacent rows of mounting racks 10 correspond to each other, that is, all the mounting racks 10 have the same height, and the initial state can be referred to as Figure 3 As shown, after closing the door, the mounting portion 4 is tilted as shown in FIG. Figure 4 As shown, the above-mentioned up-down-up-down (i.e. ↘↗↘) or up-down-up (i.e. ↗↘↗) tilted arrangement configuration is formed. When water vapor is generated by sublimation, the approximate movement direction of the water vapor can be referred to Figure 4 At this time, most of the water vapor generated by the sublimation of the sample installed on the plate layer assembly of each mounting part 4 moves in the direction ① perpendicular to the plate layer and ② along the plate layer tilted upward, while Figure 4 In the mounting frame 10 of the first and second columns, the part between the first and second columns is ③ downwardly inclined. The part where the water vapor moves downwardly in the drying room is relatively small, and most of the time it still adopts the two directions of ①②. Even so, at the junction of the first and second columns, when the water vapor passes through the board layer and reaches the position between the two mounting parts 4, the water vapor will still rise, and the water vapor also has an initial velocity in the horizontal direction. When the two parts of water vapor on both sides meet, the initial horizontal velocities will be roughly offset (completely or partially offset), and the water vapor can rise relatively vertically, so it can be effectively removed, and it is highly likely that it will not tilt into other board layers, so that the phenomenon of water vapor accumulation will not occur. Refer to Figure 4 The second and third columns in the figure have an upward tilted portion that is close to each other. This portion has relatively more water vapor. Similarly, the water vapor in the middle of these two columns also has a certain initial velocity, which can offset each other when they meet, thus rising vertically and ensuring that the water vapor does not enter other plate layers and cause impact.

[0062] Second, all the mounting parts 4 in two adjacent rows of mounting frames 10 are staggered one by one. The initial state can be referred to as Figure 6 After closing the door, the mounting portion 4 is tilted. Figure 8 , multiple connecting parts 5 located in the same row can still form a similar wave structure when moving, and multiple connecting parts 5 in the same wave structure (for example Figure 8 Among the three mounting parts 4 in the first row, the lower end of the connecting part 5 in the middle (the connecting part 5 in the first row of the second column) is lower than the lowest end of the connecting part 5 in the corresponding adjacent column (i.e., the first row of the first column), and the higher end of the connecting part 5 in the middle column (the connecting part 5 in the first row of the second column) is lower than the highest end of the connecting part 5 in the corresponding adjacent column (the connecting part 5 in the first row of the third column); among the three adjacent connecting parts 5 in the same row, the first and third connecting parts 5 have the same height and are both higher than the second connecting part 5. Figure 8 As shown, similar to the arrangement of the first mounting frame 10, in this scheme, first refer to the first column and the second column. The part between the first column and the second column is inclined downward, and there is less water vapor moving downward here. Even if there is any, it can be neutralized with each other in the horizontal direction, thereby rising vertically; referring to the second column and the third column, the part between the second column and the third column is inclined upward, and at this time, the water vapor at the top of the mounting part 4 of the first row of the second column moves upward to reach the bottom of the mounting part 4 of the first row of the third column, and is located at the edge of the mounting part 4 of the first row of the third column, so this part of the water vapor can also be quickly cleared, and when the water vapor at the top of the mounting part 4 of the second row of the third column moves upward, it will act on the edge of the mounting part 4 of the first row of the second column, so the impact on the board layers here is small and can be quickly cleared, thereby achieving a better water vapor discharge effect.

[0063] In summary, the first arrangement scheme mainly ensures that water vapor rises vertically by offsetting the initial velocity in the horizontal direction without affecting the samples of other board components; the second arrangement scheme blocks and guides the water vapor at the bottom edge of the adjacent mounting portion 4, so that the water vapor can be easily discharged, thereby achieving the intended purpose.

[0064] Embodiment 5:

[0065] Based on Example 1, refer to Fig.14 and Fig.15As shown, the plate layer assembly includes an upper panel 17, a lower panel 19, a baffle plate 18 and a sealing plate 20. The upper panel 17 and the lower panel 19 are arranged at intervals. A plurality of baffle plates 18 are arranged and are connected end to end between the upper panel 17 and the lower panel 19. The plurality of baffle plates 18 form an internal circulation airflow channel, and the sealing plate 20 is used to seal the outer baffle plates 18, the upper panel 17 and the lower panel 19 so that the inlet and outlet of the airflow channel are located on the same side. Since the mounting portion 4 in this embodiment needs to be tilted, the plate layer assembly mounted on the mounting portion 4 is preferably arranged at the fixed end of the mounting portion 4, so that the deformation of the pipeline here can be reduced when tilted, thereby helping to reduce wear. The plate layer assembly is mounted on the mounting portion 4, and the top of the plate layer assembly can be provided with a structure for fixing bottles or cup containers or other structures suitable for holding samples to facilitate the installation of samples.

[0066] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A freeze dryer with uniform heat transfer in the plate layer, characterized in that: It includes a drying box, a side-opening box door, a plate layer assembly and a mounting part for mounting the plate layer assembly, the mounting part can be rotatably arranged, and a limit piece for increasing the rotation resistance of the mounting part is provided in a horizontal position; the mounting part is spaced a plurality of times above and below to form a row of mounting frames, the mounting frames are arranged in a plurality of rows, and a connecting part is provided between two adjacent rows of the mounting frames; when the box door is closed, the connecting part moves up or down so that the two adjacent rows of the mounting frames are tilted toward the moving direction of the connecting part; when the number of the connecting parts exceeds one, the two adjacent connecting parts move in different directions.

2. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 1, characterized in that: The box door is provided with a transmission part, and the transmission part and the box door move in coordination. When the box door is opened, the transmission part is located at an initial position, at which time the connecting part is in an initial state and the mounting frame is kept in a horizontal state by the limiting member; when the box door is closed, the transmission part moves with the box door, and the transmission part acts to cause the connecting part to move up or down as the box door is closed.

3. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 2, characterized in that: The transmission part is slidably arranged at the bottom of the inner cavity of the drying box, and the transmission part is correspondingly arranged with the connecting part, a guide structure is formed between the transmission part and the connecting part, and the transmission part moves with the closing of the box door, and when moving, the transmission part acts on the connecting part through the guide structure to make the connecting part move up or down; the transmission part includes a rod body slidably arranged at the bottom of the inner cavity of the drying box and one or more guide parts arranged on the rod body; the connection between the rod body and the guide part has a smooth transition, and the same number of rod bodies are correspondingly arranged for multiple connecting parts, and the bottoms of two adjacent connecting parts correspond to the bottoms of two adjacent connecting parts in sequence. The rod body and the guide part of the transmission part, and the initial heights of two adjacent connecting parts are consistent. After the box door acts on the transmission part to move, the bottoms of the two adjacent connecting parts correspond to the guide parts and the rod bodies of the two adjacent transmission parts in sequence. The bottom of the connecting part initially acts on the rod body and finally acts on the guide part to move upward, and the bottom of the connecting part initially acts on the guide part and finally acts on the rod body to move downward; the rod body is provided with a reset spring, which keeps the rod body in a position close to the box door in the initial state, and the rod body moves and compresses the reset spring when the box door is closed.

4. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 3, characterized in that: The bottom of the connecting part is a roller, and a slot is provided in the middle of the roller surface of the roller. The widths of the rod body and the guide part are respectively equal to or less than the width of the slot, and the slot abuts against the rod body or the guide part; there are more than two guide parts, and the connecting part is provided with the same number of abutment points as the guide part; guide surfaces are provided on both sides of the guide part.

5. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 1, characterized in that: Each of the connecting parts is equipped with a motor that can be controlled by an electric control system; when the box door starts to close, the corresponding motor is turned on and drives the corresponding connecting part to move up or down.

6. A freeze dryer with uniform plate heat transfer as claimed in claim 4 or 5, characterized in that: The mounting frames are arranged in three or more rows, and correspondingly, the number of the connecting parts is one less than the number of the mounting frames; the connecting parts are arranged as columnar structures, and connecting rods are arranged between the connecting parts and the corresponding mounting frames, and the connecting rods, the connecting parts and the corresponding mounting parts are all hingedly connected; when the box door is closed, one of the connecting parts moves up, and one or two of the connecting parts adjacent to it moves down through the driving of the connecting rod, so that all the mounting frames form an inclined arrangement configuration of down-up-down-up or up-down-up-down.

7. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 6, characterized in that: A vacuum pipeline is arranged between two adjacent rows of the mounting frames and at the top of the inner cavity of the drying box. A small hole is arranged upward or downward on the vacuum pipeline between two adjacent rows of the mounting parts with corresponding numbers. The vacuum pipeline is provided with a suction channel, which is connected to the vacuum pump of the freeze dryer, and the small hole is communicated with the suction channel.

8. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 7, characterized in that: All the mounting parts in the two adjacent rows of mounting racks correspond to each other one by one. After the box door is closed, the mounting parts are tilted to form an inclined arrangement configuration of up and down or up and down. Between the two mounting parts in the same row of the two adjacent rows of mounting racks, when the water vapor moving out from the corresponding two sides meets, the initial velocities of the two sides in the horizontal direction are completely or partially offset, so that the water vapor on the two sides rise vertically.

9. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 7, characterized in that: All the mounting parts in two adjacent rows of the mounting frames are staggered one by one. After the box door is closed, the mounting parts are tilted, and multiple mounting parts in the same row form a wave structure. Among the multiple connecting parts of the same wave structure, the lower end of the connecting part in the middle is lower than the lowest end of the corresponding adjacent mounting part in another row, and the higher end of the connecting part in the middle is lower than the highest end of the corresponding adjacent mounting part in another row. Among the three adjacent connecting parts in the same row, the heights of the first and third mounting parts are the same and both are higher than the second mounting part.

10. The freeze dryer with uniform heat transfer in the plate layer as claimed in claim 1, characterized in that: The plate layer assembly includes an upper panel, a lower panel, a deflection baffle and a sealing plate. The upper panel and the lower panel are spaced apart. A plurality of deflection baffles are provided and are connected end to end between the upper panel and the lower panel. The plurality of deflection baffles form an internal circulation airflow channel, and the sealing plate is used to seal the outer deflection baffles, the upper panel and the lower panel so that the inlet and outlet of the airflow channel are located on the same side.

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