Freeze dryer support device

Abstract

The present invention discloses a support device for a freeze dryer, which belongs to the field of drying technology and includes a base and a frame. The frame includes an annular plate and a center frame fixed to each other. The annular plate is provided with through-holes at annular intervals. Support members are fixed at the corresponding through-holes of the annular plate. The base includes a connecting pipe, a movable member and a seat. The connecting pipe is sleeved on the outside of the movable member and rotates relatively with the movable member through a transmission member. The movable member is used to drive the connecting pipe to swing back and forth. The movable member is fixed to the seat. The center frame and the connecting pipe are detachably connected. In the support device for the freeze dryer of the present invention, the material will condense solid ice inside in a swinging state. The swinging material can increase the speed of heat exchange with the surroundings, improve the condensation speed, and reduce the probability of the material being adhered to solid ice.

Description

Technical Field

[0001] The invention relates to the technical field of drying, in particular to a material supporting device of a freeze dryer. Background Art

[0002] A freeze dryer is a drying machine that dehydrates materials through the principle of sublimation. It is widely used in the food and medical fields because it can dry materials while preserving their original structure and shape.

[0003] The freeze dryer first freezes the material in a low temperature and high vacuum environment. The water in the material exchanges heat with the surroundings, so that the water in the material forms solid ice. The solid ice is then heated to sublime, removing the water in the material and achieving freeze-drying.

[0004] When some materials are dried, they need to be placed in vials. The materials in the vials are stacked, making it difficult for the materials at the bottom of the vials and the center of the stack to exchange heat, resulting in uneven freeze-drying effects and low freeze-drying efficiency.

[0005] Therefore, the present application provides a technical solution to solve this technical problem. Summary of the invention

[0006] The purpose of the present invention is to solve the problems in the prior art and to provide a material supporting device for a freeze dryer.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] The material supporting device of the freeze dryer includes a base and a frame body, the frame body includes an annular plate and a center frame fixed to each other, the annular plate is provided with through-holes at annular intervals, and support members are fixed at the corresponding through-holes of the annular plate, the base includes a connecting pipe, a movable member and a seat body, the connecting pipe is sleeved on the outside of the movable member and rotates relatively with the movable member through a transmission member, the movable member is used to drive the connecting pipe to swing back and forth, the movable member is fixed to the seat body, and the center frame and the connecting pipe are detachable and connected.

[0009] The present invention is further configured as follows: the movable part includes a support rod and a sliding sleeve, the sliding sleeve is arranged outside the support rod, the support rod and the seat body are fixedly connected, the support rod and the connecting pipe rotate relative to each other through a bearing, the support rod is fixed with a sliding sealing ring in contact with the sliding sleeve, and an air cavity is formed between the sliding sleeve and the support rod.

[0010] The present invention is further configured as follows: a slide groove is formed on the outside of the sliding sleeve, the transmission member includes a boss for extending into the slide groove, the boss is fixedly connected to the connecting pipe, the slide groove is composed of a reset area and a plurality of reversing areas, the reversing area includes an inclined groove 1, a transverse groove 1, an inclined groove 2 and a transverse groove 2 which are connected in sequence, the transverse groove 2 and the inclined groove 1 which are respectively located in two adjacent reversing areas are connected, an elastic member is arranged between the connecting pipe and the support rod, and the elastic member is respectively connected to the connecting pipe and the support rod.

[0011] The present invention is further configured as follows: the reset zone includes a reset groove and connecting grooves connected to both ends of the reset groove, and the two connecting grooves are respectively connected to two transverse grooves 2 and oblique groove 1 which are far away from the reversing zone.

[0012] The present invention is further configured as follows: the support rod and the sliding sleeve are respectively formed with a guide column 1 and a guide column 2, and the guide column 1 and the guide column 2 are slidably connected with each other.

[0013] The present invention is further configured as follows: a threaded portion is formed at one end of the connecting tube away from the seat body, the center frame is formed with a connecting port for the threaded portion to pass through, the threaded portion is threadedly connected to a nut, and the nut and the center frame are abutted against each other; friction is utilized to prevent relative rotation between the center frame and the connecting tube.

[0014] The present invention is further configured such that: when the central frame is connected to the connecting pipe, a movable gap is formed between the support member and the seat body.

[0015] The present invention is further configured as follows: the support member includes a heat-insulating column and a magnetic conductive block, the magnetic conductive block is fixedly connected to the annular plate via the heat-insulating column, and an electromagnetic heater is fixedly installed at the position of the seat body corresponding to the magnetic conductive block.

[0016] In summary, the present invention has the following beneficial effects:

[0017] When the freeze dryer is in the refrigeration and vacuum stage, due to the balance of internal and external pressures, the sliding sleeve will slide relative to the support rod under the action of the gas pressure in the air cavity. The convex column will drive the connecting pipe to rotate back and forth under the action of several reversing areas, thereby causing the frame to swing. The material will condense solid ice inside under the swinging, which can increase the condensation speed and reduce the probability of the material sticking due to solid ice. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 The structure of the movable part of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 3It is a schematic diagram of the structure between the support rod, the sliding sleeve and the deformable member of the present invention;

[0021] Figure 4 The structure of the movable part of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 5 It is a schematic structural diagram of the sliding sleeve of the present invention.

[0023] In the figure: 1. center frame; 2. annular plate; 3. seat body; 4. connecting pipe; 5. threaded part; 6. support rod; 7. sliding sleeve; 8. bearing; 9. sliding sealing ring; 10. air cavity; 11. boss; 12. guide column one; 13. guide column two; 14. electromagnetic heater; 15. insulation column; 16. magnetic block; 17. inclined groove one; 18. transverse groove one; 19. inclined groove two; 20. transverse groove two; 21. reset groove; 22. connecting groove; 23. elastic member; 24. nut. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments.

[0025] like Figure 1 As shown, the present application provides a support device for a freeze dryer, including a base and a frame. The base is fixedly installed on the plate layer inside the freeze dryer, and the frame is detachably connected to the base. After the vials are placed outside the freeze dryer, the frame is moved into the freeze dryer and fixed on the base.

[0026] like Figure 1 and Figure 2 As shown, the frame body includes an annular plate 2 and a central frame 1, wherein the central frame 1 is located at the center of the annular frame, and both ends of the central frame are fixedly connected to the annular frame, wherein the annular plate 2 is provided with through-holes at annular intervals, and support members are fixed at the corresponding through-holes of the annular plate 2, and the support members include a heat-insulating column 15 and a magnetic block 16, and the magnetic block 16 is fixedly connected to the annular plate 2 through the heat-insulating column 15. The operator can pass the vial through the through-hole, and the vial will abut against the magnetic block 16 due to its own gravity. The vial will be restricted by the annular plate 2 and the magnetic block 16 and cannot move at will, thereby ensuring the position stability of the vial in the freeze dryer.

[0027] like Figure 1 and Figure 2 As shown, the base includes a connecting tube 4, a movable part and a base body 3, the base body 3 is directly fixed on the plate layer in the freeze dryer, the movable part is fixed on the base body 3, the connecting tube 4 is sleeved on the outside of the movable part, wherein the connecting tube 4 is formed with a threaded portion 5 at one end away from the base body 3, and the center frame 1 is formed with a connecting port for the threaded portion 5 to pass through, and the threaded portion 5 is threadedly connected with a nut 24, by rotating the nut 24, the nut 24 and the center frame 1 are abutted against each other, and by utilizing friction, the center frame 1 and the connecting tube 4 cannot rotate relative to each other, thereby realizing the connection between the frame body and the base.

[0028] like Figure 2 As shown, the movable part includes a support rod 6 and a sliding sleeve 7, the sliding sleeve 7 is sleeved on the outside of the support rod 6, the support rod 6 and the seat body 3 are fixedly connected, the support rod 6 and the connecting pipe 4 rotate relative to each other through a bearing 8, wherein the support rod 6 is fixed with a sliding sealing ring 9 in contact with the sliding sleeve 7, and an air cavity 10 is formed between the sliding sleeve 7 and the support rod 6. In this embodiment, the air cavity 10 is filled with nitrogen, and its air pressure is 0.1Mpa. When the air pressure in the freeze dryer changes, due to the balance of internal and external pressures, the sliding sleeve 7 and the support rod 6 will slide relative to each other, the support rod 6 and the sliding sleeve 7 are respectively formed with a guide column 12 and a guide column 2 13, and the guide column 12 and the guide column 2 13 are slidably connected. The cooperation between the guide column 12 and the guide column 2 13, and the sliding sleeve 7 and the support rod 6 can limit the relative rotation between the sliding sleeve 7 and the support rod 6, and improve the stability of the sliding sleeve 7 when sliding.

[0029] like Figure 2 , Figure 3 , Figure 4 as well as Figure 5As shown, an elastic member 23 is provided between the connecting tube 4 and the support rod 6. In this embodiment, the elastic member 23 includes a spring sheet, and both ends of the spring sheet are respectively inserted into the connecting tube 4 and the support rod 6. When the connecting tube 4 is subjected to force and rotates clockwise and counterclockwise, the spring sheet will be deformed, and when the force stops, it will be restored to the initial position due to the elasticity of the spring sheet. A transmission member is provided between the connecting tube 4 and the sliding sleeve 7. The transmission member includes a boss 11. The boss 11 is fixed on the side of the connecting tube 4 facing the sliding sleeve 7. The sliding sleeve 7 is formed with a slide groove. The boss 11 is used to extend into the slide groove and can slide along the slide groove. The slide groove is along the length of the support rod 6. The direction is set, the slide groove is composed of a reset area and a plurality of reversing areas, the reversing area includes an inclined groove 17, a transverse groove 18, an inclined groove 19 and a transverse groove 20 which are connected in sequence, the transverse groove 20 and the inclined groove 17 which are respectively located in two adjacent reversing areas are connected, the reset area includes a reset groove 21 and connecting grooves 22 connected at both ends of the reset groove 21, the two connecting grooves 22 are respectively connected with the transverse groove 20 and the inclined groove 17 which are far away from the reversing area. In the present embodiment, the length direction of the reset groove 21 is consistent with the sliding direction of the connecting tube 4. In the initial state, the boss 11 is located at the position of the reversing and reset area which is farthest from the base.

[0030] like Figure 2 , Figure 4 as well as Figure 5 As shown, when the frame and the base are in contact, a movable gap is formed between the support and the base 3. The movable gap prevents the syringe bottle and the magnetic block 16 from contacting the base 3, so that it will not affect the relative rotation between the frame and the base. The base 3 is fixedly installed with an electromagnetic heater 14. The electromagnetic heater 14 always corresponds to the magnetic block 16. The energized electromagnetic heater 14 will use electromagnetic induction to heat the magnetic block 16. The magnetic block 16 is in direct contact with the syringe bottle, so that the heat can be transferred to the material in the syringe bottle, thereby heating the material.

[0031] During the freeze-drying process, the freeze dryer is pre-cooled when the vials are placed on the rack. After the pre-cooling is completed, the rack with the vials is fixed to the base through the nut 24, so that the freeze dryer is refrigerated while the negative pressure is simultaneously pumped out. The air pressure in the freeze dryer is reduced. Due to the balance of internal and external pressures, the sliding sleeve 7 will slide relative to the support rod 6 under the action of the gas pressure in the air cavity 10, and the boss 11 will slide along the inclined groove 17 under the action of several reversing zones. Through the contact between the boss 11 and the side wall of the inclined groove 17, the connecting tube 4 will rotate slowly, and the spring will be deformed. When 11 slides into the transverse groove 18, because the length direction of the transverse groove 18 is consistent with the rotation circumferential direction of the connecting tube 4, the connecting tube 4 will quickly rotate and reset due to the elastic force of the spring, so that the boss 11 quickly slides between the transverse groove 18 and the inclined groove 2 19. As the internal and external pressures are balanced, the boss 11 slides along the inclined groove 2 19, the spring deforms, and the connecting tube 4 slowly rotates again until the boss 11 slides into the transverse groove 20. The connecting tube 4 will quickly rotate again due to the elasticity of the spring, and the boss 11 will slide to the inclined groove 17 of the next reversing area, and so on and so forth until the sliding sleeve 7 abuts against the connecting tube 4 and cannot slide.

[0032] During this process, the boss 11 will drive the connecting tube 4 to rotate back and forth, thereby causing the frame to swing, and ultimately causing the material to condense solid ice inside the material in a swinging state. The swinging material can increase the speed of heat exchange with the surroundings, increase the condensation speed, and reduce the probability of the material being adhered to solid ice. When the temperature inside the freeze dryer reaches -35°C and the air pressure inside the freeze dryer is less than 50 Pa, the electromagnetic heater 14 is energized to heat the material by electromagnetic effect, and the heated solid ice sublimates to dry the material. When the moisture in the material disappears and freeze drying is completed, the freeze dryer balances the air pressure inside and outside the machine. At this time, the frame and the base can be separated and taken out of the freeze dryer.

[0033] In this embodiment, the connecting groove 22 is inclined. When the freeze dryer balances the air pressure outside and inside the machine, the sliding sleeve 7 will be reset due to the air pressure balance, and the boss 11 overcomes the elastic rotation of the spring, so that the connecting tube 4 rotates, so that the boss 11 slides from the transverse groove 20 along the inclined connecting groove 22 into the reset groove 21. As the pressure difference between the air cavity 10 and the outside continues to change, the boss 11 will slide along the reset groove 21 until it slides between another connecting groove 22 and the reset groove 21. The connecting tube 4 is reset due to the elastic force of the spring, so that the boss 11 will be transferred to the connecting groove 22 due to the elasticity of the spring, and finally slide along the connecting groove 22 to between the connecting groove 22 and the inclined groove 17 to achieve reset.

[0034] In summary, in the material supporting device provided in this embodiment, the material will condense solid ice inside when in a swinging state. The swinging material can increase the speed of heat exchange with the surroundings, increase the condensation speed, and reduce the probability of the material being adhered to by solid ice.

[0035] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A material support device for a freeze dryer, comprising a base and a frame, characterized in that: The frame body comprises an annular plate and a central frame fixed to each other, the annular plate is provided with through-holes at annular intervals, and support members are fixed at the corresponding through-holes of the annular plate, the base comprises a connecting pipe, a movable member and a seat body, the connecting pipe sleeve is arranged on the outside of the movable member and relatively rotates with the movable member through a transmission member, the movable member is used to drive the connecting pipe to swing back and forth, the movable member is fixed to the seat body, the central frame and the connecting pipe are detachably connected, the movable member comprises a support rod and a sliding sleeve, the sliding sleeve is sleeved outside the support rod, the support rod and the seat body are fixedly connected, the support rod and the connecting pipe rotate relatively through bearings, the support rod is fixed with a sliding sealing ring in contact with the sliding sleeve, an air cavity is formed between the sliding sleeve and the support rod, The sliding sleeve is formed with a sliding groove on the outside, and the transmission part includes a convex column for extending into the sliding groove, the convex column and the connecting tube are fixedly connected, the sliding groove is composed of a reset area and a plurality of reversing areas, the reversing area includes an inclined groove 1, a transverse groove 1, an inclined groove 2 and a transverse groove 2 which are connected in sequence, the transverse groove 2 and the inclined groove 1 which are respectively located in two adjacent reversing areas are connected, an elastic member is arranged between the connecting tube and the support rod, the elastic member is respectively connected to the connecting tube and the support rod, a threaded portion is formed at one end of the connecting tube away from the seat body, the center frame is formed with a connecting port for the threaded portion to pass through, a nut is threadedly connected to the threaded portion, and the nut and the center frame are abutted; friction is utilized to prevent relative rotation between the center frame and the connecting tube.

2. The material supporting device of the freeze dryer according to claim 1, characterized in that: The reset zone includes a reset groove and connecting grooves connected to both ends of the reset groove, and the two connecting grooves are respectively connected to a second transverse groove and a first oblique groove which are far away from the reversing zone.

3. The support device of the freeze dryer according to claim 1, characterized in that: The support rod and the sliding sleeve are respectively formed with a guide column 1 and a guide column 2, and the guide column 1 and the guide column 2 are slidably connected with each other.

4. The support device of the freeze dryer according to claim 1, characterized in that: When the center frame is connected to the connecting pipe, a movable gap is formed between the support member and the seat body.

5. The material supporting device of the freeze dryer according to claim 4, characterized in that: The support member comprises a heat-insulating column and a magnetic conductive block. The magnetic conductive block is fixedly connected to the annular plate via the heat-insulating column. An electromagnetic heater is fixedly installed at a position of the seat body corresponding to the magnetic conductive block.

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