A structure for a flip-top door of a freeze dryer and the freeze dryer itself.

Abstract

This utility model relates to the technical field of freeze dryers, and in particular to a freeze dryer flip-top door structure and a freeze dryer. The freeze dryer flip-top door structure of this utility model includes a door and a flipping mechanism; the flipping mechanism includes a flipping shaft and a support assembly. The support assembly supports the flipping shaft on the freeze dryer's housing. The flipping shaft is rotatable relative to the support assembly. The flipping shaft is fixedly connected to the door to drive the door to flip. A jacket is provided inside the door, and a medium flow channel is provided inside the flipping shaft. The jacket and the medium flow channel are connected through a jacketed flexible hose. This utility model can form a stable temperature field inside the door, effectively blocking heat transfer between the inside and outside. While ensuring the normal opening and closing function of the door, it significantly improves the heat preservation performance through a built-in heat exchange system.

Description

Technical Field

[0001] This utility model relates to the technical field of freeze dryers, and in particular to a freeze dryer flip-top door structure and a freeze dryer. Background Technology

[0002] A freeze dryer is a common freeze-drying device widely used in the pharmaceutical and food industries. Its purpose is to freeze substances at low temperatures, causing the water in them to sublimate under vacuum, and then collect the condensed water to achieve the purpose of drying and dehydrating the substances.

[0003] Freeze dryers have high requirements for heat preservation performance. The heat preservation performance of the inlet and outlet doors on existing freeze dryers is poor, which reduces the heat preservation performance of the freeze dryer. Utility Model Content

[0004] The purpose of this invention is to provide a reversible door structure for a freeze dryer and a freeze dryer in order to improve the heat preservation performance of the freeze dryer.

[0005] The present invention relates to a freeze dryer flip-top door structure, which includes a door and a flipping mechanism.

[0006] The flipping mechanism includes a flipping shaft and a support assembly. The support assembly is used to support the flipping shaft on the box of the freeze dryer. The flipping shaft can rotate relative to the support assembly. The flipping shaft is fixedly connected to the small door to drive the small door to flip.

[0007] The small door is provided with a jacket, and the flip shaft is provided with a medium flow channel. The jacket and the medium flow channel are connected by a jacket hose.

[0008] Furthermore, the jacketed hose includes an inlet pipe and an outlet pipe, the medium flow channel includes an inlet flow channel section and an outlet flow channel section, the inlet pipe connects the inlet flow channel section and the inlet of the jacket, and the outlet pipe connects the outlet of the jacket and the outlet flow channel section.

[0009] Furthermore, the jacket is provided with a coil, the inlet of the coil is connected to the inlet pipe, and the outlet of the coil is connected to the outlet pipe.

[0010] Furthermore, it also includes a swing arm, one end of which is fixedly connected to the flipping shaft and the other end of which is fixedly connected to the small door. The flipping shaft drives the small door to flip through the swing arm.

[0011] Furthermore, it also includes a drive component for driving the flip shaft to rotate so as to cause the flip door to flip.

[0012] This utility model also provides a freeze dryer, including a housing and a freeze dryer flip-up door structure as described in any of the above technical solutions, which is disposed on the housing.

[0013] Furthermore, the housing is provided with a small door connector, a door frame is provided at the small door connector, and a door sealing ring is provided on the inner surface of the small door for fitting with the door frame.

[0014] Furthermore, it also includes a door lock assembly, which includes a lock frame, a lock pin, and an actuator. The lock frame is used to carry the lock pin and the actuator and is connected to the housing. The actuator is used to drive the lock pin to press the small door against the door frame.

[0015] Furthermore, it also includes an isolation enclosure for covering the door lock assembly and the support assembly.

[0016] Furthermore, the support assembly includes a support frame, a bearing, and a shaft seal. The tilting shaft is rotatably supported on the support frame via the bearing, and the shaft seal is disposed between the isolation cover and the bearing.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] A heat exchange system is formed by incorporating a jacketed structure inside the small door, which connects to the medium flow channel within the flip shaft. The heat exchange medium flows from the medium flow channel of the flip shaft, through the jacketed hose, into the small door jacket, and returns through the jacketed hose and medium flow channel on the other side after heat exchange. This creates a stable temperature field inside the small door, effectively blocking heat transfer between the inside and outside. While ensuring the normal opening and closing function of the small door, the built-in heat exchange system significantly improves its insulation performance. Specifically, the jacketed structure increases thermal resistance, while the medium flow maintains temperature equilibrium, solving the problem of insufficient insulation caused by the single-layer structure of traditional small doors. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of one embodiment of the freeze dryer flip-top door structure of this utility model;

[0020] Figure 2 for Figure 1 A magnified view of part A of the reversible door structure of the freeze dryer in the image;

[0021] Figure 3 for Figure 1 A magnified view of part B of the reversible door structure of the freeze dryer in the image;

[0022] Figure 4 for Figure 1 Side view of the reversible small door structure of the freeze dryer.

[0023] Figure label:

[0024] 10. Small door; 11. Jacket; 12. Coil; 13. Swing arm;

[0025] 20. Tilting shaft; 21. Inlet pipe; 22. Outlet pipe; 23. Inlet flow channel section; 24. Outlet flow channel section;

[0026] 30. Driver components;

[0027] 40. Small door connection;

[0028] 50. Door frame; 51. Door sealing ring;

[0029] 61. Lock frame; 62. Locking pin; 63. Driver;

[0030] 70. Isolation enclosure;

[0031] 81. Support frame; 82. Bearing; 83. Shaft seal. Detailed Implementation

[0032] The following description, in conjunction with schematic diagrams, illustrates the flip-top door structure of the freeze dryer and the freeze dryer itself, showing preferred embodiments of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and not as a limitation of the present invention. Based on the teachings of this specification, those skilled in the art can form new technical solutions through cross-combinations of different implementation methods without creating technical contradictions; such modifications should all be considered to fall within the protection scope of this patent.

[0033] The present invention will be described more specifically by way of example in the following paragraphs with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0034] The following is in conjunction with the instruction manual appendix. Figure 1 To be continued Figure 4 This invention describes the structure of the flip-top door of the freeze dryer and the freeze dryer itself.

[0035] The freeze dryer of this utility model includes a housing and a freeze dryer flip-up door structure disposed on the housing.

[0036] like Figure 1 and Figure 4As shown, the freeze dryer's flip-top door structure includes a door 10 and a flipping mechanism. The flipping mechanism includes a flipping shaft 20 and a support assembly. The support assembly supports the flipping shaft 20 on the freeze dryer's housing. The flipping shaft 20 is rotatable relative to the support assembly, and the flipping shaft 20 is fixedly connected to the door 10 to drive the door 10 to flip.

[0037] The small door 10 is provided with a sleeve 11, and the flip shaft 20 is provided with a medium flow channel. The sleeve 11 and the medium flow channel are connected through a flexible sleeve 11.

[0038] A heat exchange system is formed by incorporating a jacket 11 structure inside the small door 10, which connects to the medium flow channel within the flip shaft 20. The heat exchange medium flows from the medium flow channel of the flip shaft 20, through the flexible hose of the jacket 11, into the jacket 11 of the small door 10, and returns through the flexible hose and medium flow channel on the other side of the jacket 11 after heat exchange. This creates a stable temperature field inside the small door 10, effectively blocking heat transfer between the inside and outside. While ensuring the normal opening and closing function of the small door 10, the built-in heat exchange system significantly improves the insulation performance. Specifically, the jacket 11 structure increases the thermal resistance, while the medium flow maintains temperature equilibrium, solving the problem of insufficient insulation caused by the single-layer structure of traditional small doors 10.

[0039] Furthermore, in one embodiment, the jacket 11 hose includes an inlet pipe 21 and an outlet pipe 22, the medium flow channel includes an inlet flow channel section 23 and an outlet flow channel section 24, the inlet pipe 21 connects the inlet flow channel section 23 and the inlet of the jacket 11, and the outlet pipe 22 connects the outlet of the jacket 11 and the outlet flow channel section 24.

[0040] Specifically, the inlet pipe 21 can be made of corrugated metal or high-temperature resistant silicone tubing, with an inner diameter preferably ranging from 8 to 12 mm. The outlet pipe 22 is made of the same material as the inlet pipe 21, and a quick-release flange is provided at their interface for maintenance. The inlet flow channel section 23 is arranged axially inside the tilting shaft 20, and its cross-sectional shape is circular or elliptical. The inner wall of the flow channel is polished to reduce pressure loss. The outlet flow channel section 24 is arranged alternately with the inlet flow channel section 23 and is parallel and symmetrically distributed. The inlet of the jacket 11 adopts a flared design and is connected to the inlet pipe 21 by a clamp, with fluororubber gaskets used as the sealing material. A one-way valve is provided at the outlet of the jacket 11 to prevent backflow of the medium.

[0041] This embodiment establishes a heat exchange system consisting of an inlet pipe 21, a jacket 11, and an outlet pipe 22. It clearly defines the flow path of the medium from the flip shaft 20 to the jacket 11 and out of the flip shaft 20. Through the combination of segmented flow channel design and dedicated connecting pipes, the controllability of the medium flow direction is achieved, making the temperature distribution in the jacket 11 more uniform and the heat exchange efficiency higher.

[0042] Furthermore, in one embodiment, the jacket 11 is provided with a coil 12, the inlet of the coil 12 is connected to the inlet pipe 21, and the outlet of the coil 12 is connected to the outlet pipe 22.

[0043] The coil 12 can be arranged in different shapes, such as spiral, serpentine, or annular, within the jacket 11. Specifically, the spiral coil 12 extends the flow path of the medium through a continuous spiral structure; the serpentine coil 12 extends the path through multiple U-shaped bends; and the annular coil 12 forms stratified flow through a coaxial arrangement of multiple turns. The coil 12 is preferably made of metals with good thermal conductivity, such as stainless steel or copper alloy, and its diameter is preferably in the range of 8-15 mm. As a preferred embodiment, the coil 12 can be equipped with guide vanes or turbulence protrusions to enhance the turbulence effect of the medium.

[0044] By incorporating a coil 12 structure within the jacket 11, the medium flow path is effectively extended, and the flow resistance is reasonably increased, resulting in a more uniform distribution of the medium within the jacket 11 space. Specifically, after the medium enters the coil 12 from the inlet pipe 21, it gradually releases heat along the path of the coil 12. Due to the extended path and multiple changes in flow direction, the contact time and contact area between the medium and the inner wall of the jacket 11 are significantly increased, leading to more complete heat release from the heat exchange medium.

[0045] In one embodiment, the freeze dryer flip door structure further includes a swing arm 13, one end of which is fixedly connected to the flip shaft 20 and the other end is fixedly connected to the door 10. The flip shaft 20 drives the door 10 to flip through the swing arm 13.

[0046] The swing arm 13 can be manufactured using sheet metal stamping or casting processes, and its cross-sectional shape includes, but is not limited to, rectangular, I-shaped, or circular. The fixing connection methods include welding, bolting, or integral molding. The length of the swing arm 13 is designed according to the required tilting angle of the small door 10. Reinforcing ribs can be provided at the connection point between the swing arm 13 and the small door 10 to improve structural strength. Two swing arms 13 can be provided; the connection position between the tilting shaft 20 and the swing arm 13 can be located at one-third, one-third, or the middle of the tilting shaft 20, depending on the layout of the support components. The connection point between the swing arm 13 and the small door 10 can be located near the center of gravity of the small door 10 to optimize torque transmission.

[0047] Through the rigid connection structure of the swing arm 13, the rotational force of the flip shaft 20 is effectively transmitted to the small door 10, avoiding the gap problem that exists in traditional hinge connections.

[0048] In one embodiment, the freeze dryer flip door structure further includes a drive assembly 30, which drives the flip shaft 20 to rotate so as to flip the flip door 10.

[0049] The drive assembly 30 can use an electric motor, hydraulic motor, or pneumatic motor as its power source, with the electric motor preferably being a servo motor or stepper motor for precise control. Power transmission between the drive assembly 30 and the tilting shaft 20 can be achieved through gear transmission, belt transmission, or a coupling. In a preferred embodiment, the drive assembly 30 also includes a reduction mechanism, which can be a planetary gear reducer or a worm gear reducer, used to match the output speed of the drive assembly 30 with the required speed of the tilting shaft 20. Furthermore, the drive assembly 30 can be configured with a position sensor and a controller. The position sensor detects the rotation angle of the tilting shaft 20, and the controller controls the start / stop and speed of the drive assembly 30 according to a preset program, thereby achieving precise control of the tilting position of the small door 10.

[0050] The automatic operation of the small door 10's flipping is achieved through the cooperation of the drive component 30 and the flipping shaft 20. The drive component 30 provides a stable and reliable power output, and the flipping shaft 20 effectively transmits the rotational motion to the small door 10, solving the problem of inconvenience in manual operation.

[0051] Furthermore, in some of these embodiments, such as Figure 4 As shown, a small door connector 40 is provided on the box body, a door frame 50 is provided at the small door connector 40, and a door sealing ring 51 for fitting with the door frame 50 is provided on the inner surface of the small door 10.

[0052] Specifically, the small door connector 40 can be a flanged or welded connector, with its inner diameter matching the outer diameter of the door frame 50. The door frame 50 is preferably a stainless steel annular structure, while the contact surfaces of the remaining small doors 10 are relatively smooth. The door sealing ring 51 can be made of silicone rubber or fluororubber, with a cross-sectional shape of a hollow O-ring or a lip seal structure, and its compression is controlled within the range of 15%-25%. The contact surface between the door frame 50 and the small door 10 can be set as a plane. In other embodiments, the contact surface between the door frame 50 and the small door 10 can also be set as a stepped mating structure, forming a labyrinthine sealing path. The sealing ring mounting groove can be designed as a dovetail groove structure, with anti-detachment protrusions at the bottom of the groove.

[0053] In this embodiment, the welding connection between the small door connector 40 and the box body forms a first-level static seal; the rigid contact between the door frame 50 and the small door connector 40 forms a second-level metal sealing surface; the elastic deformation of the door sealing ring 51 fills the micro gaps to form a third-level flexible seal, thereby improving the thermal insulation performance through a three-level sealing mechanism.

[0054] In some of these embodiments, such as Figure 1 and Figure 2As shown, the freeze dryer also includes a door lock assembly, which includes a lock frame 61, a lock pin 62, and a drive 63. The lock frame 61 is used to support the lock pin 62 and the drive 63 and is connected to the housing. The drive 63 is used to drive the lock pin 62 to press the small door 10 against the door frame 50.

[0055] Specifically, the lock frame 61 can be a welded steel plate structure or an aluminum alloy casting, and is fixed to the side wall of the housing by bolts; the locking pin 62 is preferably a cylindrical stainless steel rod with an inclined guide surface at the front end, and the surface of the small door 10 is also provided with an inclined mating surface that cooperates with the inclined guide surface, so that the locking pin 62 can press the small door 10 tightly onto the door frame 50. The actuator 63 can be an electric push rod, a cylinder, or a hydraulic cylinder.

[0056] Specifically, the movement trajectory of the locking pin 62 is parallel to the plane of the small door 10, and the actuator 63 transmits the linear motion to the locking pin 62 through a linkage mechanism. In a preferred embodiment, the lock frame 61 is provided with a guide groove to limit the movement of the locking pin 62, and the actuator 63 is equipped with a pressure sensor to monitor the clamping force in real time. One door lock assembly is provided on each side to stably press the small door 10 against the door frame 50. The door lock assembly can be fixedly connected to the door frame 50 with bolts and sealed with a sealing ring.

[0057] This embodiment achieves enhanced sealing through a rigid locking structure. The lock frame 61 provides a stable mounting base, the driver 63 outputs a controllable linear driving force, and the locking pin 62 converts the driving force into a clamping force perpendicular to the door sealing surface, ensuring continuous and stable contact between the door sealing ring 51 and the door frame 50. The clamping force can be precisely adjusted by the driver 63, further improving the sealing performance.

[0058] Furthermore, in some embodiments, the freeze dryer flip-top door structure further includes an isolation cover 70 for covering the door lock assembly and the support assembly.

[0059] The isolation enclosure 70 can be of a split or integral structure. The split structure consists of two symmetrical half-shells connected by bolts, while the integral structure is manufactured using a stamping process. The enclosure material is preferably stainless steel or engineering plastic. A shaft hole is provided in the support component area, and a high-temperature resistant sealing ring is embedded within the shaft hole to achieve dynamic sealing. As a preferred embodiment, the enclosure and the housing are connected by a flange, and a silicone gasket is provided at the flange mating surface.

[0060] By adding an isolation cover 70 to form a physical isolation barrier, the isolation cover 70 completely covers the door lock assembly and support assembly, blocking direct contact with external dust and moisture. This not only solves the sealing defect problem but also extends the service life of moving parts such as the bearing 82. The modular design of the isolation cover 70 allows for maintenance without disassembling the entire structure; only partial opening of the cover is needed to complete the inspection work.

[0061] Furthermore, in some of these embodiments, such as Figure 1 and Figure 3 As shown, the support assembly includes a support frame 81, a bearing 82, and a shaft seal 83. The tilting shaft 20 is rotatably supported on the support frame 81 via the bearing 82, and the shaft seal 83 is disposed between the isolation cover 70 and the bearing 82.

[0062] The support frame 81 can be made of cast stainless steel or welded carbon steel, and its mounting surface needs to be precision machined to ensure the flatness of the assembly with the housing. The bearing 82 is preferably a double-row angular contact ball bearing 82 or a self-aligning roller bearing 82. The bearing 82 housing and the support frame 81 are fitted with an transition fit and secured with bolts. The shaft seal 83 can be a labyrinth seal or a spring-loaded mechanical seal. The sealing material is selected from fluororubber or polytetrafluoroethylene composite materials, and the sealing surface needs to be mirror-polished. The mating surface between the isolation cover 70 and the shaft seal 83 is provided with a locating stop, and a compression seal is achieved through flange bolts.

[0063] By integrating the shaft seal 83 into the transition area between the isolation housing 70 and the bearing 82, the sealing integrity of the bearing 82 cavity is maintained, effectively preventing external moisture and particulate matter from entering the bearing 82 area, while avoiding the axial dimension increase problem caused by traditional external seals. The elastic compensation structure of the shaft seal 83 can adapt to the slight wobble of the tilting shaft 20 during operation, extending the service life of the seal while ensuring the sealing effect. The modular design of the support frame 81 and the bearing 82 seat facilitates overall disassembly and assembly during maintenance, significantly improving the maintenance convenience and long-term operational reliability of the freeze dryer door 10 structure.

[0064] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A structure for a flip-top door of a freeze dryer, characterized in that, Includes a small door (10) and a flipping mechanism; The flipping mechanism includes a flipping shaft (20) and a support assembly. The support assembly is used to support the flipping shaft (20) on the box of the freeze dryer. The flipping shaft (20) can rotate relative to the support assembly. The flipping shaft (20) is fixedly connected to the small door (10) to drive the small door (10) to flip. The small door (10) is provided with a sleeve (11), and the flip shaft (20) is provided with a medium flow channel. The sleeve (11) and the medium flow channel are connected through a flexible sleeve (11).

2. The freeze dryer flip-top door structure according to claim 1, characterized in that, The jacket (11) hose includes an inlet pipe (21) and an outlet pipe (22), and the medium flow channel includes an inlet flow channel section (23) and an outlet flow channel section (24). The inlet pipe (21) connects the inlet flow channel section (23) and the inlet of the jacket (11), and the outlet pipe (22) connects the outlet of the jacket (11) and the outlet flow channel section (24).

3. The freeze dryer flip-top door structure according to claim 2, characterized in that, The jacket (11) is provided with a coil (12), the inlet of the coil (12) is connected to the inlet pipe (21), and the outlet of the coil (12) is connected to the outlet pipe (22).

4. The freeze dryer flip-top door structure according to claim 1, characterized in that, It also includes a swing arm (13), one end of which is fixedly connected to the flip shaft (20) and the other end is fixedly connected to the small door (10). The flip shaft (20) drives the small door (10) to flip through the swing arm (13).

5. The freeze dryer flip-top door structure according to claim 1, characterized in that, It also includes a drive assembly (30) for driving the flip shaft (20) to rotate so as to cause the flip door (10) to flip.

6. A freeze dryer, characterized in that, It includes a housing and a freeze dryer flip-top door structure as described in any one of claims 1-5, which is disposed on the housing.

7. The freeze dryer according to claim 6, characterized in that, The housing is provided with a small door connector (40), a door frame (50) is provided at the small door connector (40), and a door sealing ring (51) for fitting with the door frame (50) is provided on the inner surface of the small door (10).

8. The freeze dryer according to claim 7, characterized in that, It also includes a door lock assembly, which includes a lock frame (61), a lock pin (62) and a drive (63). The lock frame (61) is used to carry the lock pin (62) and the drive (63) and is connected to the housing. The drive (63) is used to drive the lock pin (62) to press the small door (10) against the door frame (50).

9. The freeze dryer according to claim 8, characterized in that, It also includes an isolation cover (70) for covering the door lock assembly and the support assembly.

10. The freeze dryer according to claim 9, characterized in that, The support assembly includes a support frame (81), a bearing (82), and a shaft seal (83). The flip shaft (20) is rotatably supported on the support frame (81) via the bearing (82), and the shaft seal (83) is disposed between the isolation cover (70) and the bearing (82).

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