Freeze dryer

Abstract

The utility model provides a freeze dryer, and belongs to the technical field of dryers. The freeze dryer comprises a freezing box, a partition plate, a lifting mechanism, a first lifting plate, a first connecting rod, a second lifting plate, a cushion block, a first placing plate, a second placing plate, a second connecting rod and a cover plate assembly. A plurality of cushion blocks are fixed to a second lifting plate, and a first placement plate is placed on the cushion blocks, so that the second lifting plate can drive the first placement plate and a second placement plate to move up and down through the cushion blocks, and the first placement plate and the second placement plate can be located on the outer side of a freezing box; according to the technical scheme, workers can conveniently place the medicine boxes in the first containing groove and the second containing groove, the first containing plate and the second containing plate can be located in the freezing box, then the medicine boxes are frozen and dried, and the use experience of products is improved.

Description

Technical Field

[0001] This utility model belongs to the field of drying technology, specifically relating to a freeze dryer. Background Technology

[0002] In related technologies, in order to achieve the purpose of low-temperature storage of drugs, the drugs are usually frozen and dried by freeze dryers. The working principle is: the water-containing substances are first frozen into solids, and then the water in them is sublimated from solids into gaseous states to remove the moisture.

[0003] The prior art (authorization announcement number: CN217876789U) discloses a freeze dryer, including a drying chamber with multiple shelves. Material trays for storing materials are placed on the shelves. Oil inlet pipes and oil return pipes are provided on the shelves. Auxiliary plates are installed at the left and right ends, above, and behind the shelves. The auxiliary plates are hollow and have oil inlets and outlets. The auxiliary plates circulate synchronously with the silicone oil inside the shelves. Based on this operation, the storage area for the material to be dried can be completely surrounded, reducing energy absorption by the drying chamber shell and other parts, enhancing the drying effect, and reducing drying time. Furthermore, the operation is simple, greatly improving the efficiency of material drying.

[0004] In this technical solution, the material tray is placed on a shelf, and the shelf is placed in the drying chamber to achieve freezing and drying of the material. However, since the shelf cannot be removed from the drying chamber, it is inconvenient to place the material tray on the shelf, thereby reducing the user experience of the product. Utility Model Content

[0005] To address the problem in existing technologies where shelves cannot be removed from the drying chamber, making it inconvenient to place material trays on them and thus reducing the user experience, this invention provides a freeze dryer that allows a second lifting plate to move the first and second placement plates up and down via multiple pads. This enables the first and second placement plates to be positioned outside the freezer, facilitating the placement of medicine boxes into the first and second receiving slots. Furthermore, positioning the first and second placement plates inside the freezer allows for freezing and drying of the medicine boxes, thereby improving the user experience. The specific technical solution is as follows:

[0006] A freeze dryer includes: a freezer chamber, a partition, a lifting mechanism, a first lifting plate, a first connecting rod, a second lifting plate, a pad, a first placement plate, a second placement plate, a second connecting rod, and a cover assembly; the freezer chamber is a hollow cavity with an opening at the top; the partition is embedded in the freezer chamber and connected to the inner wall of the freezer chamber, dividing the interior of the freezer chamber into a freezer chamber and an operating chamber; the lifting mechanism is installed in the operating chamber; the first lifting plate is connected to the lifting mechanism; one end of at least two first connecting rods is connected to the first lifting plate, and at least two first connecting rods... The other end of the connecting rod passes through the partition; the second lifting plate is located inside the freezing chamber and is connected to the other ends of at least two first connecting rods; at least two pads are fixed on the second lifting plate; a first receiving groove is provided in the first placement plate, and the first placement plate is placed on at least two pads; a second receiving groove is provided in the second placement plate, and the second placement plate is located above the first placement plate; one end of at least two second connecting rods is connected to the first placement plate, and the other end of at least two second connecting rods is connected to the second placement plate; the cover assembly is fastened to the opening of the freezing box.

[0007] In addition, the freeze dryer in the above-mentioned technical solution provided by this utility model may also have the following additional technical features:

[0008] In the above technical solution, the freeze dryer also includes: a clearance hole, an air extraction pipe, a vacuum pump, and a corrugated hose; the clearance hole is located in the second lifting plate; the air extraction pipe passes through the partition, and one end of the air extraction pipe is embedded in the clearance hole; the vacuum pump is installed on the first lifting plate; one end of the corrugated hose is connected to the output end of the vacuum pump, and the other end of the corrugated hose is connected to the air extraction pipe.

[0009] In the above technical solution, the freeze dryer further includes: positioning pins, a first sealing ring, and a second sealing ring; at least two positioning pins are connected to the second mounting plate, and at least two positioning pins pass through the first placement plate; the first sealing ring is an elastomer, the first sealing ring is fitted on the outside of the first connecting rod, and the first sealing ring is embedded in the partition; the second sealing ring is an elastomer, the second sealing ring is fitted on the outside of the suction pipe, and the second sealing ring is embedded in the partition.

[0010] In the above technical solution, the lifting mechanism includes: a threaded hole, a lead screw, and a guide rod; the threaded hole is provided with a first internal thread and is located inside the first lifting plate; the lead screw is provided with a first external thread on its outer wall, the lead screw is located inside the operating cavity, one end of the lead screw is rotatably connected to the partition plate, the other end of the lead screw is rotatably connected to the freezer, and the lead screw passes through the threaded hole; the guide rod is located inside the operating cavity, one end of the guide rod is connected to the partition plate, the other end of the guide rod is connected to the freezer, and the guide rod passes through the first lifting plate; wherein, the first internal thread and the first external thread are adapted to each other.

[0011] In the above technical solution, the lifting mechanism further includes: a first bevel gear, a motor, a second bevel gear, and a limiting groove; the first bevel gear is fitted on the outside of the lead screw; the motor is provided with an output shaft, the motor is located inside the operating cavity, and the motor is fixed to the bottom of the freezer; the second bevel gear is fitted on the outside of the output shaft of the motor, and the second bevel gear meshes with the first bevel gear; the limiting groove is provided on the inner wall of the operating cavity, at least part of the first lifting plate is embedded in the limiting groove, and the limiting groove is located above the motor.

[0012] In the above technical solution, the cover assembly includes: a cover body, a second internal thread, and a connecting part; the cover body covers the opening of the freezer; the second internal thread is provided on the inner wall of the freezer opening; the outer wall of the connecting part is provided with a second external thread, the connecting part is connected to the bottom of the cover body, and the connecting part is in contact with the inner wall of the freezer; wherein, the second internal thread and the second external thread are adapted to each other.

[0013] In the above technical solution, the cover assembly also includes: a third sealing ring and a handle; the third sealing ring is an elastomer and is embedded in both the cover body and the freezer; the handle is U-shaped and is connected to the cover body.

[0014] The freeze dryer of this utility model has the following advantages compared with the prior art:

[0015] 1. By using a lifting mechanism to move the first lifting plate up and down within the operating chamber, and by using the first lifting plate to move the second lifting plate up and down within the freezing chamber via multiple first connecting rods, the height of the second lifting plate within the freezing chamber can be adjusted. By connecting the two ends of multiple second connecting rods to the first and second placement plates respectively, and by setting the first and second receiving slots within the first and second placement plates respectively, the first and second placement plates are connected as a whole, allowing them to accommodate medicine boxes. By fixing multiple pads to the second lifting plate and placing the first placement plate on the pads, the second lifting plate can move the first and second placement plates up and down via the pads. This allows the first and second placement plates to be positioned outside the freezing chamber, facilitating the placement of medicine boxes by staff. Furthermore, positioning the first and second placement plates within the freezing chamber enables the freezing and drying of the medicine boxes, improving the user experience. Since the second lifting plate supports the first placement plate with multiple pads, the contact area between the second lifting plate and the first placement plate is reduced, thereby preventing the first placement plate and the second lifting plate from sticking together when the medicine box is frozen, so as to facilitate the separation of the first placement plate and the second lifting plate, and thus facilitate the cleaning of the first placement plate and the second placement plate.

[0016] 2. By installing the vacuum pump on the first lifting plate, connecting one end of the corrugated hose to the output end of the vacuum pump, and connecting the other end of the corrugated hose to the suction pipe, the first lifting plate can drive the vacuum pump to move up and down. This allows the suction pipe and the vacuum pump to be connected together through the corrugated hose, enabling the vacuum pump to extract air from the freezing chamber and create a vacuum environment inside the freezing chamber.

[0017] 3. By connecting multiple positioning pins to the second mounting plate and allowing the multiple positioning pins to pass through the first placement plate, the second mounting plate can be positioned by the multiple positioning pins on the first placement plate, thereby preventing relative displacement between the first placement plate and the second mounting plate.

[0018] 4. By setting a threaded hole inside the first lifting plate and passing the lead screw through the threaded hole, a threaded connection is achieved between the lead screw and the first lifting plate, thereby rotating the lead screw to drive the first lifting plate to move up and down. By connecting one end of the guide rod to the partition and the other end to the freezer, and passing the guide rod through the first lifting plate, the partition and the freezer cooperate to support the guide rod, thereby enabling the first lifting plate to move up and down along the guide rod, preventing the first lifting plate from deviating during movement, and thus improving the stability of the first lifting plate's up and down movement.

[0019] 5. By setting the limiting groove on the inner wall of the operating cavity, at least part of the first lifting plate is embedded in the limiting groove, and the limiting groove is located above the motor, so that the first lifting plate can move within the limiting groove, thereby limiting the distance of the first lifting plate moving up and down, so as to avoid interference between the first lifting plate and the motor, and to improve the user experience of the product.

[0020] 6. By setting the second internal thread on the inner wall of the freezer opening, connecting the connecting part to the bottom of the cover body, and making the connecting part fit against the inner wall of the freezer, the cover body is threadedly connected to the inner wall of the freezer through the connecting part, thereby fixing the cover body at the opening of the freezer.

[0021] 7. By connecting the U-shaped handle to the cover body, the operator can move the cover body using the handle, and at the same time, it is easy to turn the cover body using the handle, thereby improving the user experience of the product. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a freeze dryer according to the present invention;

[0023] Figure 2 for Figure 1 A magnified view of part A;

[0024] Figure 3 for Figure 1 A magnified view of section B;

[0025] in, Figure 1 Zhihe Figure 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0026] 10 Freezer, 101 Freezer Chamber, 102 Operating Chamber, 11 Partition, 12 Lifting Mechanism, 121 Lead Screw, 122 Guide Screw, 123 First Bevel Gear, 124 Motor, 125 Second Bevel Gear, 126 Limiting Groove, 13 First Lifting Plate, 14 First Connecting Rod, 15 Second Lifting Plate, 16 Pad, 17 First Placement Plate, 18 First Receiving Groove, 19 Second Placement Plate, 20 Second Receiving Groove, 21 Second Connecting Rod, 22 Cover Assembly, 221 Cover Body, 222 Connecting Part, 223 Third Sealing Ring, 224 Handle, 23 Clearance Hole, 24 Suction Pipe, 25 Vacuum Pump, 26 Corrugated Hose, 27 Positioning Pin, 28 First Sealing Ring, 29 Second Sealing Ring. Detailed Implementation

[0027] The following are specific implementation cases and appendices. Figures 1 to 3 The present invention will be further described below, but the present invention is not limited to these embodiments.

[0028] A freeze dryer, such as Figures 1 to 3 As shown, the freeze dryer includes: a freezer chamber 10, a partition 11, a lifting mechanism 12, a first lifting plate 13, a first connecting rod 14, a second lifting plate 15, a pad 16, a first placement plate 17, a second placement plate 19, a second connecting rod 21, and a cover assembly 22; the freezer chamber 10 is a hollow cavity with an opening at the top; the partition 11 is embedded in the freezer chamber 10, and the partition 11 is connected to the inner wall of the freezer chamber 10, and the partition 11 divides the interior of the freezer chamber 10 into a freezer chamber 101 and an operating chamber 102; the lifting mechanism 12 is installed in the operating chamber 102; the first lifting plate 13 is connected to the lifting mechanism 12; at least two first connecting rods 14 have one end connected to the first lifting plate 13, and at least two The other end of the first connecting rod 14 passes through the partition 11; the second lifting plate 15 is located inside the freezing chamber 101, and the second lifting plate 15 is connected to the other ends of at least two of the first connecting rods 14; at least two pads 16 are fixed on the second lifting plate 15; a first receiving groove 18 is provided in the first placement plate 17, and the first placement plate 17 is placed on at least two pads 16; a second receiving groove 20 is provided in the second placement plate 19, and the second placement plate 19 is located above the first placement plate 17; one end of at least two second connecting rods 21 is connected to the first placement plate 17, and the other end of at least two second connecting rods 21 is connected to the second placement plate 19; the cover assembly 22 is fastened to the opening of the freezing box 10.

[0029] By embedding the partition 11 inside the freezer 10 and connecting the partition 11 to the inner wall of the freezer 10, the freezer 10 supports the partition 11, thereby enabling the partition 11 to divide the interior of the freezer 10 into a freezer cavity 101 and an operating cavity 102. By installing the lifting mechanism 12 inside the operating cavity 102 and connecting the first lifting plate 13 to the lifting mechanism 12, the lifting mechanism 12 can drive the first lifting plate 13 to move up and down inside the operating cavity 102. By connecting one end of a plurality of first connecting rods 14 to the first lifting plate 13, so that the second lifting plate 15 is located in the freezer cavity 101, and connecting the other end of the plurality of first connecting rods 14 to the second lifting plate 15, when the first lifting plate 13 moves up and down inside the operating cavity 102, the first lifting plate 13 can drive the second lifting plate 15 to move up and down inside the freezer cavity 101 through the plurality of first connecting rods 14. By fixing multiple pads 16 onto the second lifting plate 15 and placing the first placement plate 17 on the multiple pads 16, the second lifting plate 15 can support the first placement plate 17 through the multiple pads 16, thereby enabling the second lifting plate 15 to drive the first placement plate 17 to move up and down. By placing the second placement plate 19 above the first placement plate 17, connecting one end of multiple second connecting rods 21 to the first placement plate 17 and the other end of multiple second connecting rods 21 to the second placement plate 19, the first placement plate 17 can support the second placement plate 19 through the multiple second connecting rods 21, thereby enabling the first placement plate 17 and the second placement plate 19 to move up and down synchronously. By setting the first receiving groove 18 and the second receiving groove 20 in the first placement plate 17 and the second placement plate 19 respectively, the first receiving groove 18 and the second receiving groove 20 can accommodate the medicine bottle container, thereby enabling the medicine bottle container to move up and down. By fastening the cover assembly 22 to the opening of the freezer 10, the cover assembly 22 can seal the freezer 10, thereby preventing the loss of cold air inside the freezer 10.

[0030] In the actual use of the product, firstly, the lifting mechanism 12 is activated, causing the first lifting plate 13 to move upward, thereby causing the second lifting plate 15, the first placement plate 17, and the second placement plate 19 to move upward, thus removing the first placement plate 17 and the second placement plate 19 from the freezer 10, so that the staff can place the medicine box into the first receiving slot 18 and the second receiving slot 20; then, the second lifting mechanism 12 is activated, causing the first placement plate 17 and the second placement plate 19 to move downward, thereby embedding the first placement plate 17 and the second placement plate 19 into the freezer 10; then, the cover assembly 22 is fastened to the opening of the freezer 10 to seal the freezer 10, thereby facilitating the freezing and drying of the medicine in the medicine box.

[0031] With the above structure, by having the lifting mechanism 12 drive the first lifting plate 13 to move up and down in the operating cavity 102, and by having the first lifting plate 13 drive the second lifting plate 15 to move up and down in the freezing cavity 101 through multiple first connecting rods 14, the height of the second lifting plate 15 in the freezing cavity 101 can be adjusted; by connecting the two ends of multiple second connecting rods 21 to the first placement plate 17 and the second placement plate 19 respectively, and by setting the first receiving groove 18 and the second receiving groove 20 in the first placement plate 17 and the second placement plate 19 respectively, the first placement plate 17 and the second placement plate 19 can be connected into a whole, thereby enabling the first placement plate 17 and the second placement plate 19 to accommodate the medicine box. By fixing multiple pads 16 to the second lifting plate 15 and placing the first placement plate 17 on the pads 16, the second lifting plate 15 can move the first placement plate 17 and the second placement plate 19 up and down via the pads 16. This allows the first placement plate 17 and the second placement plate 19 to be positioned outside the freezer 10, facilitating the placement of medicine boxes in the first receiving slot 18 and the second receiving slot 20 by staff. It also allows the first placement plate 17 and the second placement plate 19 to be positioned inside the freezer 10, thereby achieving freezing and drying of the medicine boxes and improving the user experience. Because the second lifting plate 15 supports the first placement plate 17 via the pads 16, the contact area between the second lifting plate 15 and the first placement plate 17 is reduced, preventing the first placement plate 17 from sticking to the second lifting plate 15 when freezing the medicine boxes. This facilitates separation of the first placement plate 17 and the second lifting plate 15, making it easier to clean the first placement plate 17 and the second placement plate 19.

[0032] Specifically, the freezer 10 is provided with a working chamber, which is arranged around the outside of the freezer 101, and the cooling pipe is embedded in the working chamber.

[0033] In embodiments of this utility model, such as Figures 1 to 3 As shown, the freeze dryer also includes: a clearance hole 23, an extraction pipe 24, a vacuum pump 25, and a corrugated hose 26; the clearance hole 23 is located inside the second lifting plate 15; the extraction pipe 24 passes through the partition 11, and one end of the extraction pipe 24 is embedded in the clearance hole 23; the vacuum pump 25 is mounted on the first lifting plate 13; one end of the corrugated hose 26 is connected to the output end of the vacuum pump 25, and the other end of the corrugated hose 26 is connected to the extraction pipe 24.

[0034] By setting the clearance hole 23 inside the second lifting plate 15, the suction pipe 24 passes through the partition 11, and one end of the suction pipe 24 is embedded in the clearance hole 23 to avoid interference between the suction pipe 24 and the second lifting plate 15; by installing the vacuum pump 25 on the first lifting plate 13, connecting one end of the corrugated hose 26 to the output end of the vacuum pump 25, and connecting the other end of the corrugated hose 26 to the suction pipe 24, the first lifting plate 13 can drive the vacuum pump 25 to move up and down, thereby connecting the suction pipe 24 and the vacuum pump 25 together through the corrugated hose 26, so that the vacuum pump 25 can extract the air in the freezing chamber 101 to create a vacuum environment in the freezing chamber 101.

[0035] In embodiments of this utility model, such as Figures 1 to 3 As shown, the freeze dryer also includes: positioning pins 27, a first sealing ring 28, and a second sealing ring 29; at least two positioning pins 27 are connected to the second mounting plate, and at least two positioning pins 27 pass through the first placement plate 17; the first sealing ring 28 is an elastomer, the first sealing ring 28 is fitted on the outside of the first connecting rod 14, and the first sealing ring 28 is embedded in the partition plate 11; the second sealing ring 29 is an elastomer, the second sealing ring 29 is fitted on the outside of the suction pipe 24, and the second sealing ring 29 is embedded in the partition plate 11.

[0036] By connecting multiple positioning pins 27 to the second mounting plate and allowing the multiple positioning pins 27 to pass through the first placement plate 17, the second mounting plate is positioned relative to the first placement plate 17 by the multiple positioning pins 27, thereby preventing relative displacement between the first placement plate 17 and the second mounting plate; by fitting the first sealing ring 28 on the outside of the first connecting rod 14 and embedding the first sealing ring 28 inside the partition plate 11, the first sealing ring 28 seals the gap between the first connecting rod 14 and the partition plate 11, thereby preventing cold air from flowing out of the freezing chamber 101; by fitting the second sealing ring 29 on the outside of the suction pipe 24 and embedding the second sealing ring 29 inside the partition plate 11, the second sealing ring 29 seals the gap between the suction pipe 24 and the partition plate 11, thereby preventing cold air from flowing out of the freezing chamber 101.

[0037] In embodiments of this utility model, such as Figures 1 to 3As shown, the lifting mechanism 12 includes: a threaded hole, a lead screw 121, and a guide rod 122; the threaded hole is provided with a first internal thread and is located inside the first lifting plate 13; the lead screw 121 is provided with a first external thread on its outer wall, the lead screw 121 is located inside the operating chamber 102, one end of the lead screw 121 is rotatably connected to the partition plate 11, the other end of the lead screw 121 is rotatably connected to the freezer 10, and the lead screw 121 passes through the threaded hole; the guide rod 122 is located inside the operating chamber 102, one end of the guide rod 122 is connected to the partition plate 11, the other end of the guide rod 122 is connected to the freezer 10, and the guide rod 122 passes through the first lifting plate 13; wherein, the first internal thread and the first external thread are adapted to each other.

[0038] By rotatably connecting one end of the lead screw 121 to the partition 11 and the other end of the lead screw 121 to the freezer 10, the freezer 10 and the partition 11 cooperate to support the lead screw 121, allowing the lead screw 121 to rotate within the operating chamber 102. By setting a threaded hole in the first lifting plate 13 and passing the lead screw 121 through the threaded hole, the lead screw 121 is threadedly connected to the first lifting plate 13, allowing rotation of the lead screw 121 to drive the first lifting plate 13 to move up and down. By connecting one end of the guide rod 122 to the partition 11 and the other end of the guide rod 122 to the freezer 10, and passing the guide rod 122 through the first lifting plate 13, the partition 11 and the freezer 10 cooperate to support the guide rod 122, allowing the first lifting plate 13 to move up and down along the guide rod 122, preventing the first lifting plate 13 from shifting during movement and thus improving the stability of the first lifting plate 13's up-and-down movement.

[0039] In embodiments of this utility model, such as Figures 1 to 3 As shown, the lifting mechanism 12 further includes: a first bevel gear 123, a motor 124, a second bevel gear 125, and a limiting groove 126; the first bevel gear 123 is fitted on the outside of the lead screw 121; the motor 124 is provided with an output shaft, the motor 124 is located in the operating cavity 102, and the motor 124 is fixed to the bottom of the freezer 10; the second bevel gear 125 is fitted on the outside of the output shaft of the motor 124, and the second bevel gear 125 meshes with the first bevel gear 123; the limiting groove 126 is provided on the inner wall of the operating cavity 102, at least part of the first lifting plate 13 is embedded in the limiting groove 126, and the limiting groove 126 is located above the motor 124.

[0040] By mounting the first bevel gear 123 on the outside of the lead screw 121, the lead screw 121 and the first bevel gear 123 rotate synchronously. By fixing the motor 124 to the bottom of the freezer 10, mounting the second bevel gear 125 on the outside of the output shaft of the motor 124, and meshing the second bevel gear 125 with the first bevel gear 123, the motor 124 can drive the second bevel gear 125 to rotate, thereby enabling the second bevel gear 125 to mesh with the first bevel gear 123 and rotate, thus providing power for rotating the lead screw 121. By setting the limiting groove 126 on the inner wall of the operating cavity 102, at least part of the first lifting plate 13 is embedded in the limiting groove 126, and the limiting groove 126 is located above the motor 124, so that the first lifting plate 13 can move within the limiting groove 126, thereby limiting the vertical movement distance of the first lifting plate 13 to avoid interference between the first lifting plate 13 and the motor 124, thus improving the user experience of the product.

[0041] In embodiments of this utility model, such as Figures 1 to 3 As shown, the cover assembly 22 includes: a cover body 221, a second internal thread, and a connecting part 222; the cover body 221 covers the opening of the freezer 10; the second internal thread is provided on the inner wall of the opening of the freezer 10; the connecting part 222 is provided on the outer wall of the connecting part 222, the connecting part 222 is connected to the bottom of the cover body 221, and the connecting part 222 is in contact with the inner wall of the freezer 10; wherein, the second internal thread and the second external thread are adapted to each other.

[0042] By covering the opening of the freezer 10 with the cover body 221, the cover body 221 can be used to close the opening of the freezer 10. By setting the second internal thread on the inner wall of the opening of the freezer 10, the connecting part 222 is connected to the bottom of the cover body 221 and the connecting part 222 is made to fit against the inner wall of the freezer 10, so that the cover body 221 is threadedly connected to the inner wall of the freezer 10 through the connecting part 222, thereby fixing the cover body 221 at the opening of the freezer 10.

[0043] In embodiments of this utility model, such as Figures 1 to 3 As shown, the cover assembly 22 also includes a third sealing ring 223 and a handle 224; the third sealing ring 223 is an elastomer and is embedded in both the cover body 221 and the freezer 10; the handle 224 is U-shaped and is connected to the cover body 221.

[0044] By embedding the third sealing ring 223 into both the cover body 221 and the freezer 10, the third sealing ring 223 seals the gap between the cover body 221 and the freezer 10, thereby preventing cold air from escaping from the freezer 10. By connecting the U-shaped handle 224 to the cover body 221, the operator can move the cover body 221 using the handle 224, and it is also convenient to turn the cover body 221 using the handle 224, thus improving the user experience of the product.

[0045] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A freeze-dryer characterized by, The freeze dryer comprises: a freezing box, which is a hollow cavity with an opening at the top; a partition plate embedded in the freezing box, connected with the inner wall of the freezing box, and separating the inner part of the freezing box into a freezing cavity and an operation cavity; a lifting mechanism installed in the operation cavity; a first lifting plate connected with the lifting mechanism; at least two first connecting rods, one end of each of which is connected with the first lifting plate, and the other end of each of which penetrates the partition plate; a second lifting plate located in the freezing cavity and connected with the other end of the at least two first connecting rods; at least two cushion blocks fixed on the second lifting plate; a first placing plate provided with a first accommodating groove and placed on the at least two cushion blocks; a second placing plate provided with a second accommodating groove and located above the first placing plate; at least two second connecting rods, one end of each of which is connected with the first placing plate, and the other end of each of which is connected with the second placing plate; a cover plate assembly buckled at the opening of the freezing box.

2. A freeze-dryer according to claim 1, characterised in that The freeze dryer further comprises: a clearance hole provided in the second lifting plate; an air exhaust pipe penetrating the partition plate and having one end embedded in the clearance hole; a vacuum pump installed on the first lifting plate; a corrugated hose, one end of which is in communication with the output end of the vacuum pump, and the other end of which is in communication with the air exhaust pipe.

3. A freeze-dryer as claimed in claim 2, characterised in that The freeze dryer further comprises: at least two positioning pins connected with the second placing plate and penetrating the first placing plate; a first sealing ring, which is an elastomer, sleeved on the outside of the first connecting rod and embedded in the partition plate; a second sealing ring, which is an elastomer, sleeved on the outside of the air exhaust pipe and embedded in the partition plate.

4. A freeze-dryer according to claim 1, characterised in that The lifting mechanism comprises: a threaded hole provided with a first internal thread, which is provided in the first lifting plate; a lead screw, which is provided with a first external thread on the outer wall thereof, located in the operation cavity, one end of which is rotatably connected with the partition plate, the other end of which is rotatably connected with the freezing box, and penetrates the threaded hole; a light lever, which is located in the operation cavity, one end of which is connected with the partition plate, the other end of which is connected with the freezing box, and penetrates the first lifting plate; wherein the first internal thread is matched with the first external thread.

5. A freeze-dryer as claimed in claim 4, characterised in that The lifting mechanism further comprises: a first bevel gear sleeved on the outside of the lead screw; A motor is arranged in the operation cavity, and the motor is fixed to the bottom of the freezer; A second bevel gear is sleeved outside the output shaft of the motor, and the second bevel gear is engaged with the first bevel gear; A limiting groove is arranged on the inner wall of the operation cavity, at least part of the first lifting plate is embedded in the limiting groove, and the limiting groove is located above the motor.

6. A freeze-dryer as claimed in claim 5, characterised in that The cover plate assembly comprises: A cover plate body is arranged on the opening of the freezer; A second inner thread is arranged on the inner wall of the opening of the freezer; A connecting portion is arranged on the outer wall of the connecting portion, and the connecting portion is connected to the bottom of the cover plate body and is matched with the inner wall of the freezer; The second inner thread is matched with the second outer thread.

7. A freeze-dryer as claimed in claim 6, characterised in that The cover plate assembly further comprises: A third sealing ring is an elastomer, and the third sealing ring is embedded in the cover plate body and the freezer at the same time; A handle is in a U shape, and the handle is connected to the cover plate body.

Images