Low-temperature refrigerating device of freeze dryer

Abstract

The utility model discloses a low-temperature refrigerating device of a freeze dryer. The low-temperature refrigerating device comprises a barrel body, a refrigerating machine and a cold conduction assembly, the cold guide assembly is arranged outside the cylinder in a surrounding mode and comprises a top plate, a first cold guide plate, a second cold guide plate and a bottom plate. One side of the top plate is connected with the cold head end face of the refrigerator, and the other side of the top plate is connected with the outer side wall of the barrel; the first cold guide plate and the second cold guide plate are arranged on the two opposite sides of the outer wall of the barrel correspondingly and connected with the two ends of the top plate correspondingly. The bottom plate is arranged at the bottom of the cylinder body and is connected with the outer side wall of the cylinder body; the two ends of the bottom plate are connected with the first cold guide plate and the second cold guide plate correspondingly. The air conditioner can solve the problems that a traditional compressor refrigerating system is complex in structure, unfriendly to the environment and not ideal in refrigerating effect.

Description

Technical Field

[0001] This utility model relates to the field of low-temperature refrigeration technology, and in particular to a low-temperature refrigeration device for a freeze dryer. Background Technology

[0002] Vacuum freeze-drying technology involves freezing materials at low temperatures below the eutectic point, then heating the materials in a vacuum environment to gradually sublimate the ice into water vapor. After the ice has completely sublimated, the bound water in the materials is removed to completely dry the sample.

[0003] Existing freeze dryers use traditional compressor refrigeration, with their refrigeration systems comprising major components such as compressors, condensers, evaporators, and expansion valves. To maintain the normal operation of the refrigeration system, a liquid receiver, oil separator, filter, and various valves are also required. Furthermore, the piping between these components must be rationally arranged to ensure optimal refrigeration performance. This structural design results in a complex internal system, low space utilization, and an excessively large overall size, making subsequent maintenance inconvenient.

[0004] Compressor refrigeration systems typically use fluorinated media such as Freon as refrigerants, which have adverse environmental impacts. Furthermore, single-stage compressor refrigeration struggles to meet the cooling requirements of cryogenic temperatures, while cascade compressor refrigeration, although capable of reaching cryogenic temperatures, suffers from lower refrigeration efficiency.

[0005] Therefore, there is an urgent need to propose a low-temperature refrigeration device for freeze dryers to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to propose a low-temperature refrigeration device for a freeze dryer, so as to solve the problems of complex structure, environmental unfriendliness and unsatisfactory refrigeration effect of traditional compressor refrigeration systems.

[0007] To solve the above-mentioned technical problems, this utility model provides a low-temperature refrigeration device for a freeze dryer, including a cylinder, a refrigeration unit and a cooling conductive component;

[0008] The cooling guide assembly is arranged around the outside of the cylinder, and the cooling guide assembly includes a top plate, a first cooling guide plate, a second cooling guide plate, and a bottom plate;

[0009] The top plate is located at the top of the cylinder, and one side of the top plate is connected to the cold head end face of the refrigeration unit, and the other side is connected to the outer wall of the cylinder.

[0010] The first cooling plate and the second cooling plate are respectively disposed on opposite sides of the outer wall of the cylinder and are respectively connected to both ends of the top plate;

[0011] The bottom plate is disposed at the bottom of the cylinder and connected to the outer wall of the cylinder; the two ends of the bottom plate are respectively connected to the first cooling plate and the second cooling plate.

[0012] Furthermore, the top plate is provided with first fins at both ends; the first fins are provided with first through holes; the first cooling plate is provided with second fins at both ends; the second cooling plate is provided with third fins at both ends; the second fins and the third fins are provided with first waist-shaped holes corresponding to the positions of the first through holes.

[0013] Furthermore, the bottom plate is provided with a fourth fin at both ends, and the fourth fin is provided with a second through hole; the second fin and the third fin are both provided with a second waist-shaped hole corresponding to the position of the second through hole.

[0014] Furthermore, the end face of the cold head is provided with a threaded hole; the top plate is provided with a countersunk hole corresponding to the threaded hole.

[0015] Furthermore, the cylinder is provided with a plurality of first studs; both the first and second cooling plates are provided with third oblong holes corresponding to the positions of the first studs.

[0016] Furthermore, the cylinder body is provided with a plurality of second studs on the side near the bottom plate; the bottom plate is provided with a fourth oblong hole corresponding to the position of the second studs.

[0017] Furthermore, the refrigerator includes a Stirling refrigerator or a pulse tube refrigerator.

[0018] Furthermore, the top plate, the first cooling plate, the second cooling plate, and the bottom plate are respectively in close contact with the four sides of the cylinder.

[0019] Furthermore, the connection between the top plate and the cold head end face of the refrigerator, as well as the connection between the top plate, the first cold guiding plate, the second cold guiding plate and the bottom plate, are all filled with thermally conductive material.

[0020] Furthermore, the top plate, the first cooling plate, the second cooling plate, and the bottom plate are all made of metallic materials.

[0021] Through the above technical solution, this utility model has the following beneficial effects:

[0022] By circling the outside of the cylinder with a cooling assembly consisting of a top plate, a first cooling plate, a second cooling plate, and a bottom plate, and connecting the top plate to the cold head end face of the refrigeration unit, a complete cooling conduction channel is formed. This effectively conducts the cooling energy generated by the refrigeration unit to various parts of the cylinder, improving refrigeration efficiency and the uniformity of temperature distribution.

[0023] This device also achieves reliable connection and good heat conduction between the components of the cooling assembly by setting fins, through holes and waist-shaped holes between each cooling plate and filling the connection with heat-conducting material, while facilitating installation and disassembly; the use of metal materials to make each cooling plate further improves the heat conduction performance and ensures the overall cooling effect of the refrigeration device. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cylinder assembly structure of a low-temperature refrigeration device for a freeze dryer according to the present invention;

[0025] Figure 2 This is a schematic diagram of the overall structure of a low-temperature refrigeration device for a freeze dryer according to the present invention;

[0026] Figure 3 This is a rear view structural diagram of the cylinder of a low-temperature refrigeration device for a freeze dryer according to the present invention;

[0027] Figure 4 This is a schematic diagram of the top plate structure of a low-temperature refrigeration device for a freeze dryer according to the present invention;

[0028] Figure 5 This is a schematic diagram of the first cooling plate structure of a low-temperature refrigeration device for a freeze dryer according to the present invention.

[0029] Figure 6 This is a schematic diagram of the second cooling plate structure of a low-temperature refrigeration device for a freeze dryer according to the present invention;

[0030] Figure 7 This is a schematic diagram of the base plate structure of a low-temperature refrigeration device for a freeze dryer according to the present invention.

[0031] In the diagram: 1. Cylinder; 2. Refrigeration unit; 3. Cold head; 4. Top plate; 5. First cooling plate; 6. Second cooling plate; 7. Bottom plate; 8. First fin; 9. First through hole; 10. Second fin; 11. Third fin; 12. First oblong hole; 13. Fourth fin; 14. Second through hole; 15. Second oblong hole; 17. Countersunk hole; 18. First stud; 19. Third oblong hole; 20. Second stud; 21. Fourth oblong hole. Detailed Implementation

[0032] The following is a more detailed description of a low-temperature refrigeration device for a freeze dryer according to the present invention, with reference to the accompanying drawings, which illustrate 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 is not intended to limit the present invention.

[0033] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. 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] like Figures 1-2 As shown in the figure, this utility model embodiment provides a low-temperature refrigeration device for a freeze dryer, including a cylinder 1, a refrigeration unit 2, and a cooling conduction component.

[0035] Specifically, the cooling conductive component is arranged around the outside of the cylinder 1. This surrounding cooling conductive component design can form a complete cold energy conduction channel, which is beneficial to the uniformity of the cooling effect.

[0036] More specifically, the cooling assembly includes a top plate 4, a first cooling plate 5, a second cooling plate 6, and a bottom plate 7. The top plate 4 is located at the top of the cylinder 1, with one side connected to the end face of the cold head 3 of the refrigerator 2 and the other side connected to the outer wall of the cylinder 1. The first cooling plate 5 and the second cooling plate 6 are respectively disposed on opposite sides of the outer wall of the cylinder 1 and are respectively connected to both ends of the top plate 4. The bottom plate 7 is disposed at the bottom of the cylinder 1 and is connected to the outer wall of the cylinder 1. Both ends of the bottom plate 7 are respectively connected to the first cooling plate 5 and the second cooling plate 6. This embodiment enables the cooling energy to be evenly transferred from the cold head 3 to each cooling plate through the top plate 4, and then conducted to various parts of the cylinder 1.

[0037] The first cooling plate 5 and the second cooling plate 6 are respectively symmetrically arranged on opposite sides of the outer wall of the cylinder 1.

[0038] Preferred, such as Figure 3 As shown, the cylinder 1 is provided with a plurality of first studs 18; the first cooling plate 5 and the second cooling plate 6 are both provided with third oblong holes 19 corresponding to the positions of the first studs 18. In this embodiment, the first studs 18 pass through the third oblong holes 19, and a nut is used to tighten the nut so that the side plane of the first cooling plate 5 is in close contact with the outer wall of the cylinder 1 or the side plane of the second cooling plate 6 is in close contact with the outer wall of the cylinder 1, so as to ensure the cooling effect.

[0039] Preferably, the cylinder 1 is provided with a plurality of second studs 20 on the side near the bottom plate 7; the bottom plate 7 is provided with a fourth waist-shaped hole 21 corresponding to the position of the second studs 20.

[0040] In this embodiment, after the second stud 20 passes through the fourth oblong hole 21, the nut is tightened to make the upper surface of the base plate 7 fit tightly against the upper side wall of the cylinder 1, so as to ensure the cooling effect of the cylinder 1 and the base plate 7; and it can also enhance the tight connection between the components, while facilitating installation and disassembly.

[0041] In this embodiment, as Figures 4-6 As shown, both ends of the top plate 4 are provided with first fins 8; the first fins 8 are provided with first through holes 9; both ends of the first cooling plate 5 are provided with second fins 10; both ends of the second cooling plate 6 are provided with third fins 11; both the second fins 10 and the third fins 11 are provided with first waist-shaped holes 12 corresponding to the positions of the first through holes 9. The fin configuration increases the contact area and improves the heat conduction efficiency.

[0042] In a specific example, after the bolt passes through the first through hole 9 and the second oblong hole 15, the nut is tightened to make the surfaces of one of the first fins 8 and one of the second fins 10 or another first fin 8 and one of the third fins 11 fit tightly together, so as to ensure the cooling effect of the top plate 4 and the first cooling plate 5 or the top plate 4 and the second cooling plate 6.

[0043] In one embodiment, such as Figure 7 As shown, the base plate 7 has fourth fins 13 at both ends, and each fourth fin 13 has a second through hole 14. Both the second fin 10 and the third fin 11 have second oblong holes 15 corresponding to the positions of the second through holes 14. By setting the oblong hole structure, position adjustment can be performed during installation, improving assembly accuracy and convenience. In this embodiment, bolts can be passed through the second through holes 14 and the second oblong holes 15, and then nuts can be tightened to ensure a tight fit between the surfaces of one fourth fin 13 and another second fin 10, or another fourth fin 13 and another third fin 11, thus guaranteeing the cooling effect between the base plate 7 and the left side plate.

[0044] Preferably, the end face of the cold head 3 is provided with a threaded hole; the top plate 4 is provided with a countersunk hole 17 corresponding to the threaded hole. For example, the cold head 3 of the refrigerator 2 and the top plate 4 are connected by countersunk screws passing through the countersunk hole 17 and the threaded hole, and the whole is placed on the top of the cylinder 1. The lower surface of the top plate 4 is tightly attached to the outer wall of the cylinder 1 by gravity.

[0045] In this embodiment, the refrigerator 2 includes a Stirling refrigerator 2 or a pulse tube refrigerator 2. Those skilled in the art will understand that, to achieve the same effect, the refrigerator 2 can be a cryogenic refrigerator 2, including other types of refrigerators 2 besides those in this embodiment.

[0046] Preferably, the top plate 4, the first cooling plate 5, the second cooling plate 6, and the bottom plate 7 are tightly fitted to the four sides of the cylinder 1, respectively. This ensures good heat conduction. This tight fit minimizes heat loss.

[0047] Preferably, the connection between the top plate 4 and the end face of the cold head 3 of the refrigerator 2, as well as the connection between the top plate 4, the first cold-conducting plate 5, the second cold-conducting plate 6, and the bottom plate 7, is filled with a thermally conductive material. The thermally conductive material can be thermally conductive grease, thermally conductive adhesive, or other thermally conductive materials. Filling the tiny gaps between the contact surfaces with the thermally conductive material can significantly improve the heat transfer efficiency.

[0048] In a specific example, the top plate 4, the first cooling plate 5, the second cooling plate 6, and the bottom plate 7 are all made of metallic materials. The metallic materials are preferably copper, aluminum, or other metals with good thermal conductivity. Those skilled in the art will understand that the metallic materials can be selected according to actual needs.

[0049] In this embodiment, after the refrigeration unit 2 is turned on, the cold head 3 generates cooling energy. The cold head 3 is in close contact with the top plate 4, and the cooling energy is transferred from the cold head 3 to the top plate 4. The flat end of the top plate 4 is in close contact with the upper wall of the cylinder 1, ensuring that the cooling energy of the top plate 4 is transferred to the cylinder 1. Since the first fins 8 on both sides of the top plate 4 are in close contact with the upper fins (i.e., one of the second fins 10 and one of the third fins 11) on both sides of the first cooling plate 5 and the second cooling plate 6, the cooling energy is transferred from the cooling top plate 4 to the first cooling plate 5 and the second cooling plate 6. The flat surfaces of the first cooling plate 5 and the second cooling plate 6 are in close contact with the left and right walls of the cylinder 1, ensuring that the cooling energy of the cooling plates is transferred to the cylinder 1. The fourth fins 13 on both sides of the base plate 7 are tightly fitted with the lower fins (i.e., another second fin 10 and another third fin 11) of the first and second cold-conducting plates 5 and 6, respectively, ensuring that the cold energy is transferred from the first and second cold-conducting plates 5 and 6 to the base plate 7. The flat end of the base plate 7 is tightly fitted with the bottom wall of the cylinder 1, ensuring that the cold energy is transferred from the base plate 7 to the cylinder 1. Since the area of ​​the cold head 3 of the refrigerator 2 is small and it is in direct contact with the wall of the cylinder 1, the cold energy is not fully discharged. The use of cold-conducting plates can fully discharge the cold energy of the refrigerator 2. At the same time, the cold-conducting plates covering the cylinder 1 can fully conduct the cold energy to the cylinder 1, while ensuring the temperature uniformity of the cylinder 1.

[0050] In summary, the low-temperature refrigeration device for a freeze dryer proposed in this utility model has the following advantages:

[0051] By circling the outside of the cylinder with a cooling assembly consisting of a top plate, a first cooling plate, a second cooling plate, and a bottom plate, and connecting the top plate to the cold head end face of the refrigeration unit, a complete cooling conduction channel is formed. This effectively conducts the cooling energy generated by the refrigeration unit to various parts of the cylinder, improving refrigeration efficiency and the uniformity of temperature distribution.

[0052] This device also achieves reliable connection and good heat conduction between the components of the cooling assembly by setting fins, through holes and waist-shaped holes between each cooling plate and filling the connection with heat-conducting material, while facilitating installation and disassembly; the use of metal materials to make each cooling plate further improves the heat conduction performance and ensures the overall cooling effect of the refrigeration device.

[0053] 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 low-temperature refrigeration device for a freeze dryer, characterized in that, It includes a cylinder (1), a refrigeration unit (2), and a cooling conductive assembly; The cooling guide assembly is arranged around the outside of the cylinder (1), and the cooling guide assembly includes a top plate (4), a first cooling guide plate (5), a second cooling guide plate (6) and a bottom plate (7); The top plate (4) is located at the top of the cylinder (1), and one side of the top plate (4) is connected to the end face of the cold head (3) of the refrigerator (2), and the other side is connected to the outer wall of the cylinder (1). The first cooling plate (5) and the second cooling plate (6) are respectively disposed on opposite sides of the outer wall of the cylinder (1) and are respectively connected to both ends of the top plate (4); The bottom plate (7) is disposed at the bottom of the cylinder (1) and connected to the outer side wall of the cylinder (1); the two ends of the bottom plate (7) are respectively connected to the first cooling plate (5) and the second cooling plate (6).

2. The low-temperature refrigeration device for the freeze dryer as described in claim 1, characterized in that, The top plate (4) is provided with a first fin (8) at both ends; the first fin (8) is provided with a first through hole (9); the first cooling plate (5) is provided with a second fin (10) at both ends; the second cooling plate (6) is provided with a third fin (11) at both ends; the second fin (10) and the third fin (11) are provided with a first waist-shaped hole (12) corresponding to the position of the first through hole (9).

3. The low-temperature refrigeration device for a freeze dryer as described in claim 2, characterized in that, The bottom plate (7) has a fourth fin (13) at both ends, and the fourth fin (13) has a second through hole (14); the second fin (10) and the third fin (11) both have a second waist-shaped hole (15) corresponding to the position of the second through hole (14).

4. The low-temperature refrigeration device for a freeze dryer as described in claim 1, characterized in that, The end face of the cold head (3) is provided with a threaded hole; the top plate (4) is provided with a countersunk hole (17) corresponding to the threaded hole.

5. The low-temperature refrigeration device for a freeze dryer as described in claim 1, characterized in that, The cylinder (1) is provided with a plurality of first studs (18); the first cooling plate (5) and the second cooling plate (6) are each provided with a third waist-shaped hole (19) corresponding to the position of the first studs (18).

6. The low-temperature refrigeration device for a freeze dryer as described in claim 1, characterized in that, The cylinder (1) has a plurality of second studs (20) on the side near the bottom plate (7); the bottom plate (7) has a fourth waist-shaped hole (21) corresponding to the position of the second studs (20).

7. The low-temperature refrigeration device for a freeze dryer as described in claim 1, characterized in that, The refrigerator (2) includes a Stirling refrigerator (2) or a pulse tube refrigerator (2).

8. The low-temperature refrigeration device for the freeze dryer according to claim 1, characterized in that, The top plate (4), the first cooling plate (5), the second cooling plate (6) and the bottom plate (7) are respectively in close contact with the four sides of the cylinder (1).

9. The low-temperature refrigeration device for a freeze dryer according to claim 1, characterized in that, The connection between the top plate (4) and the end face of the cold head (3) of the refrigerator (2), as well as the connection between the top plate (4), the first cold guiding plate (5), the second cold guiding plate (6) and the bottom plate (7), is filled with heat-conducting material.

10. The low-temperature refrigeration device for a freeze dryer as described in claim 1, characterized in that, The top plate (4), the first cooling plate (5), the second cooling plate (6), and the bottom plate (7) are all made of metal.

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