Refrigerator vibration suppression structure and cryostat

Abstract

The invention provides a refrigerator vibration suppression structure and a cryostat, and relates to the technical field of refrigerators, the refrigerator vibration suppression structure comprises an upper cavity and a lower cavity, a damping shock absorber is arranged at the top end of the upper cavity, a spring shock absorber is arranged between the lower cavity and the upper cavity, and a vibration isolation table is arranged at the bottom end of the lower cavity; a three-axis vibration exciter is arranged at the bottom end of the lower cavity. According to the refrigerator vibration suppression structure and the refrigerator, effective suppression of vibration is achieved, the stability and precision of the refrigerator in highly sensitive experiments and applications are ensured, the performance of the refrigerator is improved through the design, and reliable technical support is provided for low-temperature scientific research and experiments.

Description

Technical Field

[0001] The invention relates to the field of refrigerators, and in particular to a refrigerator vibration suppression structure and a low-temperature thermostat. Background Art

[0002] Since low-temperature equipment is very sensitive to mechanical vibration, the vibration generated by the refrigerator will be transmitted to the refrigeration vibration isolation interface through the sealing bellows, thereby affecting the low-temperature equipment.

[0003] In terms of refrigerator vibration suppression, some technologies have been widely used, such as traditional shock pads and shock absorbers. However, these technologies often have limitations in practical applications. For example, although shock pads and shock absorbers can reduce vibration transmission to a certain extent, their effects are often affected by multiple factors such as materials, structures, and installation conditions, and their suppression effects on high-frequency vibrations and micro-vibrations are limited.

[0004] In view of the limitations of existing vibration suppression technology and the wide application and importance of refrigerators in various fields, it is particularly important to develop a new type of refrigerator vibration suppression structure. This structure needs to be able to effectively suppress the vibration of the refrigerator, improve its stability and reliability, and also have the advantages of simple structure, easy installation, and low cost. Summary of the invention

[0005] The purpose of the present invention is to provide a refrigerator vibration suppression structure and a cryostat, which achieves effective vibration suppression and ensures the stability and accuracy of the refrigerator in highly sensitive experiments and applications. This design not only improves the performance of the refrigerator, but also provides reliable technical support for cryogenic scientific research and experiments.

[0006] To achieve the above object, the present invention provides a refrigerator vibration suppression structure, comprising an upper chamber and a lower chamber, a damping shock absorber is arranged at the top of the upper chamber, a spring shock absorber is arranged between the lower chamber and the upper chamber, and a vibration isolation platform is arranged at the bottom of the lower chamber;

[0007] A three-axis exciter is disposed at the bottom end of the upper chamber, and the three-axis exciter can also be connected to a cold head disposed on the lower chamber.

[0008] Preferably, a first mounting plate and a second mounting plate disposed below the first mounting plate are disposed on the upper chamber, a first bellows is disposed between the first mounting plate and the second mounting plate, and a refrigeration unit is disposed below the second mounting plate.

[0009] Preferably, it also includes a support frame, and the support frame is connected to the damping shock absorber.

[0010] Preferably, a third mounting plate is provided on the lower chamber, a cold head is provided on the third mounting plate, the cold head includes a primary cold head and a secondary cold head, a plug-in heat exchanger is provided on the outer jacket of the secondary cold head, the plug-in heat exchanger is located at the connection between the primary cold head and the secondary cold head, a flexible cold chain is provided at one end of the secondary cold head, and an external connection end is provided at one end of the flexible cold chain;

[0011] The first-stage cold head is provided with a shell, the second-stage cold head, the plug-in heat exchanger, the flexible cold chain, and the external connection end are all located in the shell, and the external connection end is connected to the bottom of the shell;

[0012] A vacuum cover is sleeved on the outer side of the shell, and a second bellows is arranged between the third mounting plate and the shell.

[0013] Preferably, the two ends of the spring shock absorber are respectively a second mounting plate and a vacuum cover;

[0014] A support rod is arranged on one side of the spring shock absorber, and two ends of the support rod are respectively a first mounting plate and a vacuum cover.

[0015] Preferably, a chamber connecting assembly is provided between the upper chamber and the lower chamber, an air storage tank is provided on the chamber connecting assembly, a circulation pump is provided at one end of the air storage tank, a first control valve is provided between the circulation pump and the air storage tank, a first filter and a second control valve are provided in sequence at one end of the circulation pump, a second filter and a third control valve are further provided in parallel with the circulation pump, the first filter and the second control valve, and the second filter is connected to the first control valve;

[0016] The second control valve is connected to the first mounting plate and the third mounting plate respectively, and the third control valve is connected to the housing.

[0017] Preferably, a refrigerant inlet and outlet is provided on the refrigeration unit.

[0018] Preferably, at least one damping shock absorber is provided, and at least two spring shock absorbers are provided.

[0019] Preferably, the vibration isolation platform is located on the outer side of the bottom end of the vacuum cover and the inner side of the bottom end of the support frame.

[0020] A low temperature thermostat includes a refrigerator vibration suppression structure.

[0021] Therefore, the present invention adopts the above-mentioned refrigerator vibration suppression structure and refrigerator, and the technical effects are as follows:

[0022] (1) By installing the upper chamber and the lower chamber with variable volumes on both sides of the fixed position of the refrigeration unit respectively and connecting the two chambers, the vibration of the refrigeration unit can be reduced in a softer and more balanced manner.

[0023] (2) By setting up inertial exciters along the X, Y, and Z axes, the vibration of the exciters can be made opposite to the vibration direction of the refrigerator, thereby actively reducing the vibration of the refrigeration unit and reducing the load on other structures.

[0024] (3) The damping shock absorber and the vibration isolation table work together to reduce the vibration of the vacuum cover.

[0025] (4) The gas in the lower chamber improves the heat exchange efficiency of the plug heat exchanger to quickly and efficiently cool the shell of the lower chamber to reduce the temperature of the lower chamber, so that the lower chamber can act as a cold shield to reduce heat exchange between the cold head and external components such as the chamber.

[0026] (5) The refrigerator is decoupled from the external environment through the spring damper, the upper chamber, the lower chamber, and the flexible cold chain to reduce the interference of the external environment on the vibration of the refrigeration unit. At the same time, the vibration of the refrigeration unit is reduced through the spring damper, the upper chamber, and the lower chamber.

[0027] (6) The gas pipeline can adjust the air pressure in the upper chamber and the lower chamber to meet the vibration reduction requirements of the refrigeration unit; at the same time, it can drive the gas in the lower chamber to flow through the plug-in heat exchanger to adjust the cooling effect of the first-stage cold head on the shell of the lower chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of a refrigerator vibration suppression structure according to the present invention;

[0029] Figure 2 A schematic diagram of the chamber interconnecting components.

[0030] Reference numerals

[0031] 1. Upper chamber; 2. Lower chamber; 3. Damping shock absorber; 4. Spring shock absorber; 5. Vibration isolation table; 6. Three-axis exciter; 7. First mounting plate; 8. Second mounting plate; 9. First bellows; 10. Refrigeration unit; 11. Support frame; 12. Third mounting plate; 13. Primary cold head; 14. Secondary cold head; 15. Plug-in heat exchanger; 16. Flexible cold chain; 17. External terminal; 18. Shell; 19. Vacuum cover; 20. Second bellows; 21. Support rod; 22. Chamber connecting assembly; 23. Gas tank; 24. Circulation pump; 25. First filter; 26. Second filter; 27. First control valve; 28. Second control valve; 29. ​​Third control valve; 30. Refrigerant inlet and outlet. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0033] Unless otherwise defined, technical or scientific terms used in the present invention shall have the common meanings understood by one having ordinary skills in the field to which the present invention belongs.

[0034] Embodiment 1

[0035] like Figure 1 As shown, a refrigerator vibration suppression structure includes a support frame 11, in which an upper chamber 1 and a lower chamber 2 are arranged, wherein a first mounting plate 7 is arranged on the upper chamber 1, and a second mounting plate 8 is arranged below the first mounting plate 7, and a first bellows 9 is arranged between the first mounting plate 7 and the second mounting plate 8, so that the upper chamber 1 is a variable volume structure.

[0036] At least one damping shock absorber 3 is arranged between the support frame 11 and the first mounting plate 7. In the present embodiment, three damping shock absorbers 3 are arranged, and more damping shock absorbers can be arranged according to the demand. The damping shock absorber 3 effectively isolates the vibration brought to the refrigerator by the external vibration.

[0037] A refrigeration unit 10 is disposed below the second mounting plate 8, and a refrigerant inlet and outlet 30 is disposed on the refrigeration unit 10. A three-axis exciter 6 is disposed between the second mounting plate 8 and the refrigeration unit 10, and the three-axis exciter 6 can also be connected to a cold head.

[0038] The shaker includes inertial shakers arranged along the X, Y, and Z axes to generate vibrations in the opposite direction of the cold head to minimize the vibrations to nanometers or less to allow the cryostat to be used for vibration-sensitive experiments and other purposes.

[0039] A lower chamber 2 is arranged below the refrigeration unit 10, and a third mounting plate 12 is arranged on the lower chamber 2. A cold head, a flexible cold chain 16, and an external connection end 17 are arranged in sequence below the third mounting plate 12. The cold head includes a primary cold head 13 and a secondary cold head 14. The secondary cold head 14 is provided with a plug-in heat exchanger 15 at the connection between the primary cold head 13 and the secondary cold head 14. The external connection end 17 is used for external connection to a cooled object. The primary cold head 13 exchanges heat with the shell 18 through the plug-in heat exchanger 15.

[0040] The primary cold head 13, the secondary cold head 14, the plug-in heat exchanger 15, the flexible cold chain 16, and the external connection end 17 are located in the shell 18. A vacuum cover 19 is provided on the outside of the shell 18. A third bellows is provided between the third mounting plate 12 and the shell 18, so that the lower chamber 2 becomes a structure with variable volume.

[0041] The first bellows 9 and the second bellows 20 can effectively absorb and isolate vibrations due to their flexibility and elastic properties. When external vibrations act on the refrigerator, the bellows can absorb these vibration energies and reduce their transmission to the refrigeration unit 10 and other sensitive components, thereby protecting the refrigerator from vibration damage. The scalability of the first bellows 9 and the second bellows 20 allows the volume of the upper chamber 1 to be adjusted as needed. This adjustment may be due to temperature changes, pressure changes, or other factors during the operation of the refrigerator. By adjusting the volume of the upper chamber 1, the performance of the refrigerator can be optimized to ensure that it can operate stably under different working conditions.

[0042] A vibration isolation platform 5 is provided below the vacuum cover 19 . The vibration isolation platform 5 is located inside the support frame 11 and on the inner side of the support frame 11 . The support frame 11 and the vibration isolation platform 5 are fixedly installed on the ground.

[0043] The external connection terminal 17 is connected to the bottom end of the shell 18 to decouple the mechanical vibration between the cold head and the shell 18 .

[0044] The refrigerator vibration suppression structure is further provided with a spring shock absorber 4, both ends of which are respectively connected to the second mounting plate 8 and the vacuum cover 19 to reduce the vibration of the vacuum chamber.

[0045] A support rod 21 is provided on one side of the spring shock absorber 4, and the flow ends of the support rod 21 are respectively connected to the first mounting plate 7 and the vacuum cover 19, for supporting the upper chamber 1. At least two spring shock absorbers 4 and support rods 21 are provided, and two are provided in this embodiment, which can be increased according to needs.

[0046] The first mounting plate 7, the second mounting plate 8 and one side of the housing 18 are provided with a chamber connecting component 22, such as Figure 2 As shown, the chamber interconnecting components 22 are connected by pipelines, and the chamber interconnecting components 22 adjust the air pressure in the upper chamber 1 and the lower chamber 2 to meet different vibration reduction requirements. An air storage tank 23 is provided on the chamber interconnecting component 22, and a first control valve 27 is provided at one end of the air storage tank 23. The first control valve 27 is respectively connected to a circulation pump 24 and a second filter 26. The other end of the circulation pump 24 is connected to the second filter 26. The other ends of the first filter 25 and the second filter 26 are respectively connected to a second control valve 28 and a third control valve 29.

[0047] Among them, the second control valve 28 is connected to the first mounting plate 7 and the third mounting plate 12, and the third control valve 29 is connected to the housing 18. The first control valve 27 and the circulating pump 24 are connected to the third fixing plate side of the lower chamber 2, so that the gas can flow through the plug-in heat exchanger 15 in the lower chamber 2, thereby controlling the heat exchange state of the plug-in heat exchanger 15; in addition, the upper chamber 1 and the lower chamber 2 can also be connected to the gas storage tank 23 through the circulating pump 24, so as to adjust the amount of gas in the upper chamber 1 and the lower chamber 2 through the circulating pump 24, so as to adjust the gas pressure of the upper chamber 1 and the lower chamber 2 to meet different vibration reduction requirements.

[0048] Therefore, the present invention adopts the above refrigerator vibration suppression structure and refrigerator to achieve effective vibration suppression and ensure the stability and accuracy of the refrigerator in highly sensitive experiments and applications. This design not only improves the performance of the refrigerator, but also provides reliable technical support for low-temperature scientific research and experiments.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A refrigerator vibration suppression structure, characterized in that: It comprises an upper chamber and a lower chamber, wherein a damping shock absorber is arranged at the top of the upper chamber, a spring shock absorber is arranged between the lower chamber and the upper chamber, and a vibration isolation platform is arranged at the bottom of the lower chamber; A three-axis exciter is disposed at the bottom end of the upper chamber, and the three-axis exciter can also be connected to a cold head disposed on the lower chamber.

2. A refrigerator vibration suppression structure according to claim 1, characterized in that: The upper chamber is provided with a first mounting plate and a second mounting plate arranged below the first mounting plate, a first corrugated pipe is arranged between the first mounting plate and the second mounting plate, and a refrigeration unit is arranged below the second mounting plate.

3. The refrigerator vibration suppression structure according to claim 1, characterized in that: Also included is a support frame, which is connected to the damping shock absorber.

4. The refrigerator vibration suppression structure according to claim 1, characterized in that: The lower chamber is provided with a third mounting plate, and a cold head is provided on the third mounting plate. The cold head includes a primary cold head and a secondary cold head. A plug-in heat exchanger is provided on the outer jacket of the secondary cold head. The plug-in heat exchanger is located at the connection between the primary cold head and the secondary cold head. A flexible cold chain is provided at one end of the secondary cold head, and an external connection end is provided at one end of the flexible cold chain. The first-stage cold head is provided with a shell, the second-stage cold head, the plug-in heat exchanger, the flexible cold chain, and the external connection end are all located in the shell, and the external connection end is connected to the bottom of the shell; A vacuum cover is sleeved on the outer side of the shell, and a second bellows is arranged between the third mounting plate and the shell.

5. The refrigerator vibration suppression structure according to claim 1, characterized in that: The two ends of the spring shock absorber are respectively a second mounting plate and a vacuum cover; A support rod is arranged on one side of the spring shock absorber, and two ends of the support rod are respectively a first mounting plate and a vacuum cover.

6. The refrigerator vibration suppression structure according to claim 1, characterized in that: A chamber connecting assembly is provided between the upper chamber and the lower chamber, an air storage tank is provided on the chamber connecting assembly, a circulation pump is provided at one end of the air storage tank, a first control valve is provided between the circulation pump and the air storage tank, a first filter and a second control valve are provided at one end of the circulation pump in sequence, a second filter and a third control valve are also provided in parallel with the circulation pump, the first filter and the second control valve, and the second filter is connected to the first control valve; The second control valve is connected to the first mounting plate and the third mounting plate respectively, and the third control valve is connected to the housing.

7. The refrigerator vibration suppression structure according to claim 1, characterized in that: The refrigeration unit is provided with a refrigerant inlet and outlet.

8. The refrigerator vibration suppression structure according to claim 1, characterized in that: At least one damping shock absorber is provided, and at least two spring shock absorbers are provided.

9. The refrigerator vibration suppression structure according to claim 1, characterized in that: The vibration isolation platform is located on the outer side of the bottom end of the vacuum cover and the inner side of the bottom end of the support frame.

10. A cryostat, characterized in that: The invention comprises a refrigerator vibration suppression structure as described in claims 1-9.

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