Refrigeration device

Abstract

The invention relates to the technical field of refrigeration, and discloses a refrigeration device. The refrigeration device comprises an inner container; the cold source is located above the inner container; the gravity assisted heat pipe is communicated with the cold source to form a closed loop; wherein the gravity assisted heat pipe comprises a first heat pipe section and a second heat pipe section, the first heat pipe section is communicated between the second heat pipe section and the cold source, the second heat pipe section is wound on the outer side of the inner container, the first heat pipe section is located above the inner container, and the first heat pipe section forms a cantilever structure. The first heat pipe section serves as a cantilever structure, one end of the first heat pipe section communicates with the cold source, the other end of the first heat pipe section is connected with the second heat pipe section, high-frequency reciprocating vibration generated by the cold source can be buffered through the structure and deformation of the first heat pipe section, vibration is prevented from being directly transmitted to the second heat pipe section wound around the inner container, and the vibration breaking risk caused by fatigue stress concentration of the gravity heat pipe is greatly reduced.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, for example, to a refrigeration device. Background Technology

[0002] Currently, refrigeration systems (including Stirling refrigerators, pulse tube refrigerators, and GM refrigerators) have relatively higher refrigeration efficiency compared to traditional compressor refrigeration systems under large temperature difference refrigeration conditions (refrigeration temperature difference greater than 60℃). The cold end of the refrigerator is connected to a gravity heat pipe, which is a sealed copper pipe surrounding the inner liner of the refrigerator, and finally insulated from room temperature by a combination of the refrigerator's VIP and polyurethane foam.

[0003] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: In related technologies, the heat pipe of the refrigeration device is fixed to the surface of the inner liner, with only the end connected to the cold source. However, in this structure, the heat pipe lacks buffer space. The high-frequency reciprocating vibration generated when the cold source is working will be directly transmitted to the entire length of the heat pipe. Under long-term operation or impact conditions such as transportation or drops, the heat pipe is prone to breakage due to fatigue stress concentration, resulting in refrigerant leakage and failure of the refrigeration device.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0005] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0006] This disclosure provides a refrigeration device for containers to improve the vibration damping effect of heat pipes in the refrigeration device, reduce the risk of heat pipe breakage, and improve the reliability of the refrigeration device.

[0007] This disclosure provides a refrigeration device, comprising: an inner liner; a cold source located above the inner liner; and a gravity heat pipe connected to the cold source to form a closed loop; wherein the gravity heat pipe includes a first heat pipe section and a second heat pipe section, the first heat pipe section being connected between the second heat pipe section and the cold source, the second heat pipe section being coiled around the outer surface of the inner liner, the first heat pipe section being located above the inner liner, and the first heat pipe section forming a cantilever structure.

[0008] In some alternative embodiments, the first heat pipe section is located between the cold source and the top wall of the inner liner, and the first heat pipe section is inclined relative to the vertical direction to form a cantilever structure.

[0009] In some alternative embodiments, the second heat pipe section includes: a top heat pipe section connected to the first heat pipe section and disposed on the top wall of the inner liner; and a side heat pipe section disposed on the side wall of the inner liner and coiled in a vertical direction.

[0010] In some alternative embodiments, the side heat pipe section includes multiple pipes connected end to end, with the multiple pipes arranged at intervals from top to bottom, wherein one or more pipes are arranged at a downward angle.

[0011] In some alternative embodiments, the cantilever structure is located on the front side of the top wall of the inner liner, the front end of the top heat pipe section is connected to the cantilever structure, and the top heat pipe section extends from front to back to the rear side of the inner liner, and the side heat pipe section is connected to the rear end of the top heat pipe section; wherein, the top wall of the inner liner slopes downward in the direction from front to back.

[0012] In some alternative embodiments, the top heat pipe section slopes downward in a direction away from the first heat pipe section.

[0013] In some alternative embodiments, the first heat pipe section includes a first pipe section and a second pipe section, the second heat pipe section includes a third pipe section and a fourth pipe section, the first pipe section is connected between the third pipe section and the cold source, and the second pipe section is connected between the cold source and the fourth pipe section; wherein, the first pipe section and the second pipe section both form a cantilever structure, and the third pipe section and the fourth pipe section are both arranged in a top-to-bottom direction around the outside of the inner liner.

[0014] In some alternative embodiments, the inner liner includes: a first sidewall; a second sidewall disposed on one side of the first sidewall; and a third sidewall disposed on the other side of the first sidewall, which together with the first sidewall and the second sidewall encloses a refrigeration compartment with an opening, the opening being disposed opposite to the first sidewall; wherein, a third pipe segment is coiled around the outside of the first sidewall and the second sidewall, and a fourth pipe segment is coiled around the outside of the first sidewall and the third sidewall.

[0015] In some alternative embodiments, the refrigeration device further includes: a fixing strip located on the outside of the inner liner, having a mounting groove; wherein a portion of the gravity heat pipe is located within the mounting groove, and the mounting groove is used to restrict the movement of the gravity heat pipe.

[0016] In some alternative embodiments, the gravity heat pipe is an integral bent structure; and / or, the first heat pipe segment is made of a flexible material.

[0017] The refrigeration device provided in this embodiment can achieve the following technical effects: In this embodiment, the gravity heat pipe is connected to the cold source to form a closed loop. The gaseous working fluid inside the gravity heat pipe condenses into a liquid at the cold end and flows downward along the gravity heat pipe under the drive of gravity. The liquid absorbs heat from the inner liner and evaporates into a gaseous working fluid. Under the action of pressure difference, the gaseous working fluid moves upward along the gravity heat pipe and condenses into a liquid again at the cold source. The liquid working fluid then moves downward along the gravity heat pipe, thus circulating and achieving cooling of the cooling chamber inside the inner liner. The first heat pipe section is connected between the cold source and the second heat pipe section. The second heat pipe section is used for heat exchange with the inner liner, and the first heat pipe section is used to enable communication and flow of refrigerant between the cold source and the second heat pipe section. The first heat pipe section, acting as a cantilever structure, connects to the cold source at one end and the second heat pipe section at the other. Its structure and deformation buffer the high-frequency reciprocating vibrations generated by the cold source, preventing direct transmission of vibrations to the second heat pipe section coiled within the inner liner. This significantly reduces the risk of vibration-induced breakage of the gravity heat pipe due to fatigue stress concentration. Even under complex conditions such as transportation, drops, and impacts from inclined surfaces, it effectively prevents refrigerant leakage, ensuring the reliability of the refrigeration unit. Furthermore, the first heat pipe section is located above the inner liner, allowing for more flexible placement. The length of the cantilever structure formed by the first heat pipe section can be rationally set according to requirements, without being constrained by the fixed inner liner wall. This allows for excellent vibration damping through sufficient cantilever length and facilitates the coupling installation of the gravity heat pipe with the cold end. The cantilever acts like a spring, ensuring a uniform liquid film distribution on the inner wall of the gravity heat pipe without fluctuations, increasing the reliability and anti-disturbance capability of the gravity heat pipe and preventing blockage of gaseous and liquid working fluids that could obstruct flow.

[0018] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0019] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a partial structural schematic diagram of a refrigeration device provided in an embodiment of the present disclosure; Figure 2 This is a partial structural schematic diagram of a refrigeration device provided in an embodiment of the present disclosure from another perspective; Figure 3 This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure; Figure 4 This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure; Figure 5This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure; Figure 6 This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of the structure of a fixing strip provided in an embodiment of this disclosure; Figure 8 This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure; Figure 9 This is a partial structural schematic diagram of another refrigeration device provided in an embodiment of this disclosure.

[0020] Figure label: 10. Inner liner; 11. Top wall; 12. First side wall; 13. Second side wall; 14. Third side wall; 15. Bottom wall; 16. Opening; 20. Cold source; 30. Gravity heat pipe; 31. First heat pipe section; 311. First pipe section; 312. Second pipe section; 313. Connecting section; 314. Inclined section; 315. Cantilever structure; 32. Second heat pipe section; 321. Third pipe section; 322. Fourth pipe section; 323. Top heat pipe section; 324. Side heat pipe section; 325. Pipeline; 40. Fixing strip; 41. First fixing strip; 42. Second fixing strip; 43. Third fixing strip; 44. Fourth fixing strip; 45. Fifth fixing strip; 46. Sixth fixing strip; 47. Mounting groove. Detailed Implementation

[0021] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0022] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for describing embodiments of this disclosure herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0023] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0024] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0025] Unless otherwise stated, the term "multiple" means two or more.

[0026] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0028] For ease of description, the length direction of the inner liner in this application is as follows: Figure 1 The direction indicated by Y in the figure is the forward and backward direction. Figure 1 The direction indicated by X in the figure is the height direction. Figure 1 The direction indicated by Z in the middle.

[0029] Combination Figures 1 to 9 As shown, this embodiment of the present disclosure provides a refrigeration device, which includes an inner liner 10, a cold source 20, and a gravity heat pipe 30. The inner liner 10 defines a refrigeration chamber, and the cold source 20 is located above the inner liner 10. The gravity heat pipe 30 is connected to the cold source 20 and forms a closed loop. The gravity heat pipe 30 includes a first heat pipe section 31 and a second heat pipe section 32. The first heat pipe section 31 is connected between the second heat pipe section 32 and the cold source 20. The second heat pipe section is coiled around the outer surface of the inner liner 10. The first heat pipe section 31 is located above the inner liner 10 and forms a cantilever structure 315.

[0030] In this embodiment, the gravity heat pipe 30 is connected to the cold source 20 to form a closed loop. The gaseous working fluid in the gravity heat pipe 30 condenses into a liquid at the cold end and flows downward along the gravity heat pipe 30 under the drive of gravity. The liquid absorbs heat from the inner liner 10 and evaporates into a gaseous working fluid. The gaseous working fluid moves upward along the gravity heat pipe 30 under the action of pressure difference and condenses into a liquid again at the cold end. The liquid working fluid then moves downward along the gravity heat pipe 30, and so on, to achieve the cooling of the cooling chamber in the inner liner 10. By dividing the gravity heat pipe 30 into a first heat pipe section 31 and a second heat pipe section 32, with the first heat pipe section 31 located above the inner liner 10 and forming a cantilever structure 315, the cantilever structure 315 formed by the first heat pipe section 31 can utilize its own structural characteristics to buffer the high-frequency vibrations generated by the cold source 20 during operation, preventing the vibrations from being directly transmitted to the second heat pipe section 32 that is attached to the inner liner 10. This significantly reduces the risk of breakage of the gravity heat pipe 30 due to vibration fatigue, ensuring the operational stability of the refrigeration device under complex conditions such as transportation and bumps. In addition, since the first heat pipe section 31 is directly connected to the cold source 20, and the second heat pipe section 32 is attached to or close to the outer surface of the inner liner 10, the cold energy generated by the cold source 20 can be quickly conducted through the first heat pipe section 31 to the second heat pipe section 32, and then evenly diffused to the inner liner 10, improving the cooling efficiency and the temperature uniformity of the inner liner 10. The cantilever structure 315 ensures that the liquid film on the inner wall of the first heat pipe section 31 is evenly distributed and will not fluctuate, which increases the reliability and anti-disturbance capability of the gravity heat pipe 30. It will not cause blockage between gaseous and liquid working fluids, resulting in poor flow. It also facilitates the coupling and installation of the gravity heat pipe 30 and the cold source 20.

[0031] Optionally, the cold source 20 is spaced above the top of the inner liner 10, and the first heat pipe section 31 is located between the cold source 20 and the top wall 11 of the inner liner 10, and the first heat pipe section 31 is inclined relative to the vertical direction to form a cantilever structure 315.

[0032] In this embodiment, the first heat pipe section 31 is located between the cold source 20 and the top wall 11 of the inner liner 10 and is inclined relative to the vertical direction. The inclined arrangement of the first heat pipe section 31 can form a stable cantilever structure 315, enhancing the vibration resistance and load-bearing capacity of the gravity heat pipe 30, and can also adapt to the gravity reflux requirements of the working fluid inside the gravity heat pipe 30, avoiding the working fluid from stagnating in the pipe and ensuring the working fluid circulation efficiency. In addition, compared with the vertically arranged first heat pipe section, the inclined first heat pipe section 31 can optimize the cold energy transfer path, so that the cold energy can smoothly transition from the cold source 20 to the top wall 11 of the inner liner 10, reducing cold energy loss.

[0033] Optionally, combined Figure 8As shown, the first heat pipe section 31 includes a connecting section 313 and an inclined section 314. The connecting section 313 connects the cold source 20 and the inclined section 314. The inclined section 314 is inclined relative to the vertical direction and forms a cantilever structure 315. In this way, the connecting section 313 connects the inclined section 314 and the cold source 20, so that the extension and setting position of the cantilever structure 315 are more flexible.

[0034] Optionally, the inclined section 314 extends along the length of the inner liner 10 and slopes downward away from the cold source 20. This makes the connection position between the second heat pipe section 32 and the first hot end pipe more flexible, allowing for an increase in the size and layout of the second heat pipe section 32 and improving the cooling capacity of the top wall 11 of the inner liner 10.

[0035] Optionally, the length of the inclined section 314 is 200mm to 400mm.

[0036] In this embodiment, the length of the inclined section 314 is between 200mm and 400mm, which can ensure the vibration isolation effect without increasing the space occupied, and facilitates the filling of insulation material.

[0037] Optionally, the length of the inclined section 314 can be 200mm, 240mm, 250mm, 280mm, 300mm, 350mm, 380mm or 400mm, etc.

[0038] Optionally, the second heat pipe section 32 includes a top heat pipe section 323 and a side heat pipe section 324. The top heat pipe section 323 is connected to the first heat pipe section 31 and is coiled around the top wall 11 of the inner liner 10. The side heat pipe section 324 is coiled around the side wall of the inner liner 10 and is coiled in the vertical direction.

[0039] In this embodiment, the top heat pipe section 323 is directly connected to the first heat pipe section 31, and the top heat pipe is coiled around the top wall 11 of the inner liner 10. This allows the top heat pipe section 323 to receive the cold energy transferred from the cold source 20 and the first heat pipe section 31, covering the area of ​​the top wall 11 of the inner liner 10. This ensures cooling of the top of the cooling chamber and solves the problem of uneven temperature in the cooling chamber caused by traditional heat pipes only covering the sides of the inner liner 10, resulting in higher top temperatures. The side heat pipe section 324 is coiled vertically around the outside of the inner liner 10, uniformly conducting cold energy downwards from the top, achieving cooling of the sides of the cooling chamber. Thus, through the top heat pipe section 323 and the side heat pipe section 324, comprehensive cold energy coverage of the sides and top of the inner liner 10 is achieved, significantly improving the overall temperature uniformity of the inner liner 10. Furthermore, the segmented structure of the second heat pipe section 32 facilitates adjusting the heat pipe layout density according to the cooling needs of different areas of the inner liner 10, optimizing cold energy distribution, and reducing the difficulty of heat pipe processing and installation.

[0040] Optionally, the side heat pipe section 324 includes a plurality of pipes 325 connected end to end, the plurality of pipes 325 being arranged at intervals from top to bottom, wherein one or more pipes 325 are arranged at an angle from top to bottom. That is, one or more pipes are arranged at an angle to the horizontal direction.

[0041] In this embodiment, the side heat pipe section 324 is composed of multiple pipes 325 connected end-to-end and spaced vertically, with some pipes 325 inclined in the vertical direction. The spaced multiple pipes 325 can avoid local cold accumulation caused by excessive density of gravity heat pipes 30, while reserving space for insulation material filling and improving the insulation effect. In addition, the inclined pipes 325 can adapt to the gravity reflux law of the working fluid of gravity heat pipe 30, accelerating the downward flow of liquid working fluid and the upward return of gaseous working fluid, avoiding working fluid blockage and ensuring smooth circulation. At the same time, the segmented design of multiple pipes 325 can also disperse vibration stress, reduce the risk of breakage of individual pipes 325, and improve the structural reliability and service life of the side heat pipe section 324.

[0042] Optionally, combined Figure 9 As shown, the cantilever structure 315 is located on the front side of the top wall 11 of the inner liner 10. The front end of the top heat pipe section 323 is connected to the cantilever structure, and the top heat pipe section 323 extends from front to back to the rear side of the inner liner 10. The side heat pipe section 324 is connected to the rear end of the top heat pipe section 323. The top wall 11 of the inner liner 10 is inclined downward in the direction from front to back.

[0043] In this embodiment, the top heat pipe section 323 is added to the top wall 11 of the inner liner 10. The top wall 11 of the inner liner 10 is inclined, so the top wall 11 of the inner liner 10 has an inclination angle. The top heat pipe section 323, which is coiled around the top wall 11 of the inner liner 10, has no reverse slope and will generate a large amount of cold storage on the bottom wall 15 of the inner liner 10, thereby improving the cooling capacity of the gravity heat pipe 30 and the high efficiency of the inner liner 10.

[0044] Optionally, the top heat pipe section 323 is inclined downward in a direction away from the first heat pipe section 31.

[0045] In this embodiment, the top heat pipe section 323 is inclined downwards in a direction away from the first heat pipe section 31, accelerating the flow of the working fluid from the top heat pipe section 323 to the side heat pipe section 324, and avoiding the decrease in heat exchange efficiency caused by the working fluid stagnating at the end of the top heat pipe section 323. The inclined arrangement of the top heat pipe section 323 also allows the cold energy to diffuse naturally downwards along the inclined direction, reducing the accumulation of cold energy at the top, improving the efficiency of cold energy transfer to the side heat pipe section 324, enhancing the smoothness of the connection between the top heat pipe section 323 and the first heat pipe section 31 and the side heat pipe section 324, reducing the flow resistance of the working fluid in the gravity heat pipe 30, and ensuring the cooling speed and operational stability of the refrigeration device.

[0046] Optionally, the top heat pipe section can be tilted by setting limiting components, such as using a pad or other structure. Here, the top heat pipe section can be tilted either by tilting the top wall of the inner liner or by using other components in conjunction to achieve the tilt.

[0047] Optionally, the top heat pipe section 323 is bent and disposed on the top wall 11 of the inner liner 10, which can increase the contact area between the top heat pipe section 323 and the top wall 11 of the inner liner 10, thereby increasing the cooling area and cooling effect.

[0048] Optionally, the top heat pipe section 323 extends in an N-shape.

[0049] Optionally, the first heat pipe section 31 includes a first pipe section 311 and a second pipe section 312, and the second heat pipe section 32 includes a third pipe section 321 and a fourth pipe section 322. The first pipe section 311 is connected between the third pipe section 321 and the cold source 20, and the second pipe section 312 is connected between the cold source 20 and the fourth pipe section 322. The first pipe section 311 and the second pipe section 312 both form a cantilever structure 315, and the third pipe section 321 and the fourth pipe section 322 are both attached to the outside of the inner liner 10 in a top-to-bottom direction.

[0050] In this embodiment, the cold source 20 flows through the first pipe section 311 and the second pipe section 312 to the third pipe section 321 and the fourth pipe section 322, respectively. The first pipe section 311 and the second pipe section 312 form a cantilever structure 315, which can improve the vibration reduction effect of the first pipe section 311 and the second pipe section 312, and ensure that the liquid film on the inner wall of the first pipe section 311 and the second pipe section 312 is evenly distributed without fluctuation, thereby increasing the reliability and anti-disturbance capability of the gravity heat pipe 30 and preventing blockage of gaseous and liquid working fluids that would cause poor flow. The third pipe section and the fourth pipe section 322 are both attached to the outer side of the inner liner 10 in a top-to-bottom direction. Through their cooperation with the first pipe section 311 and the second pipe section 312, the cooling area is increased and the cooling effect of the cooling device is improved.

[0051] Optionally, the inner liner 10 includes a first sidewall 12, a second sidewall 13, and a third sidewall 14. The second sidewall 13 is located on one side of the first sidewall 12, and the third sidewall 14 is located on the other side of the first sidewall 12, forming an accommodating cavity with an opening 16 together with the first sidewall 12 and the second sidewall 13. The opening 16 is opposite to the first sidewall 12. The third pipe segment 321 is coiled around the outside of the first sidewall 12 and the second sidewall 13, and the fourth pipe segment 322 is coiled around the outside of the first sidewall 12 and the third sidewall 14.

[0052] In this embodiment, the first sidewall 12 is positioned opposite to the opening 16. Specifically, the first sidewall 12 is the rear sidewall of the inner liner 10, and the second sidewall 13 and third sidewall 14 are the left and right sidewalls of the inner liner 10. The third pipe segment 321 is coiled around the outside of the first sidewall 12 and the second sidewall 13, and the fourth pipe segment 322 is coiled around the outside of the first sidewall 12 and the third sidewall 14. This ensures a balanced supply of cold air to the left and right sides and the rear of the inner liner 10, compensating for the tendency for cold air to leak from the opening 16 and improving the temperature uniformity of the entire cavity. Furthermore, the arrangement of the third pipe segment 321 and the fourth pipe segment 322 can balance the vibration stress during the operation of the refrigeration device, preventing localized stress concentration on the gravity heat pipe 30. Combined with the vibration reduction effect of the double cantilever structure 315, this further enhances the overall structural stability and service life of the device.

[0053] Optionally, the inner liner 10 includes a top wall 11 and a bottom wall 15. The top wall 11 is located at the top of the first side wall 12, the second side wall 13 and the third side wall 14, and the bottom wall 15 is located at the bottom of the first side wall 12, the second side wall 13 and the third side wall 14.

[0054] Optionally, the third pipe section 321 includes a third top heat pipe section and a third side heat pipe section. The front end of the third top heat pipe section is connected to the lower end of the first pipe section, and the rear end of the third top heat pipe section is connected to the upper end of the third side heat pipe section. The third side heat pipe section is coiled around the outside of the first side wall 12 and the second side wall 13, and each section 325 of the third side heat pipe section is inclined downward along the flow direction of the liquid working medium inside it. This can improve the smoothness of the flow of the liquid working medium and avoid the liquid working medium and gaseous working medium from blocking each other and causing poor flow.

[0055] Optionally, the fourth pipe section 322 includes a fourth top heat pipe section and a fourth side heat pipe section. The front end of the fourth top heat pipe section is connected to the lower end of the second pipe section 312, and the rear end of the fourth top heat pipe section is connected to the upper end of the fourth side heat pipe section. The fourth side heat pipe section is coiled around the outside of the first side wall 12 and the third side wall 14, and each section 325 of the fourth side heat pipe section is inclined downward along the flow direction of the liquid working medium inside it. This can improve the smoothness of the flow of the liquid working medium and avoid the liquid working medium and gaseous working medium from blocking each other and causing poor flow.

[0056] Optionally, the first pipe section 311 and the second pipe section 312 are inclined in the same direction.

[0057] In this embodiment, the first pipe section 311 and the second pipe section 312 adopt the same inclination direction, which enables the two cantilever structures 315 to form a symmetrical and balanced force system, synchronously buffering the high-frequency vibration of the cold source 20 and dispersing stress, avoiding stress interference caused by opposite inclination directions, reducing the risk of vibration fatigue and fracture of a single heat pipe section, and improving the overall vibration resistance reliability of the cantilever structure 315. At the same time, it can optimize the flow path of the working fluid in the gravity heat pipe 30, so that the outflow working fluid of the first pipe section 311 and the return working fluid of the second pipe section 312 are coordinated, reducing the pressure fluctuation and working fluid blockage problem in the pipe, ensuring smooth closed-loop circulation, and making the transfer of cold energy from the cold source 20 to the subsequent heat pipe sections more even, further improving the temperature uniformity of the inner liner 10.

[0058] Optionally, such as Figures 5 to 8 As shown, the refrigeration device also includes a fixing strip 40, which is located on the outside of the inner liner 10 and has a mounting groove 47; wherein, part of the gravity heat pipe 30 is located in the mounting groove 47, and the mounting groove 47 is used to restrict the movement of the gravity heat pipe 30.

[0059] In this embodiment, a fixing strip 40 with a mounting groove 47 is provided on the outer side of the inner liner 10. The gravity heat pipe 30 can be embedded in the mounting groove 47. The mounting groove 47 can limit the displacement and shaking of the gravity heat pipe 30, preventing the gravity heat pipe 30 attached to the inner liner 10 from shifting due to vibration during the operation or transportation of the refrigeration device, thus ensuring the reliability of the connection between the third pipe segment 321 and the first pipe segment 311, and the fourth pipe segment 322 and the second pipe segment 312. The supporting effect of the fixing strip 40 on the heat pipe can distribute its own weight and the stress generated by vibration, reducing the risk of breakage of the gravity heat pipe 30.

[0060] Optionally, the angle between the first heat pipe section 31 and the top wall 11 of the inner liner 10 is between 10° and 45°. This ensures the length of the first heat pipe section 31 while preventing it from being too high, thus guaranteeing vibration damping and preventing breakage. Furthermore, the angle between the first heat pipe section 31 and the top wall 11 of the inner liner 10 within the aforementioned range ensures the flow dynamics of the working fluid and prevents blockage.

[0061] Optionally, the angle between the first heat pipe section 31 and the top wall 11 of the inner liner 10 is 10° to 30°.

[0062] Optionally, the angle between the first heat pipe section 31 and the top wall 11 of the inner liner 10 is 10°, 15°, 19°, 20°, 25°, 30°, 35° or 40°, etc.

[0063] Optionally, there are multiple fixing strips 40, including a first fixing strip 41, a second fixing strip 42, a third fixing strip 43, and a fourth fixing strip 44. The first fixing strip 41 is located on the second side wall 13, the second fixing strip 42 is located on the third side wall 14, and the third fixing strip 43 and the fourth fixing strip 44 are both located on the first side wall 12. All fixing strips 40 extend vertically along the column. Each fixing strip 40 is constructed with multiple mounting grooves 47. In this way, the fixing strip 40 intersects with the pipe 325 of the second heat pipe section 32. The mounting grooves 47 are located at the intersection of the pipe 325 and the fixing strip 40. Thus, multiple fixing strips 40 can provide multiple mounting grooves 47 for the second heat pipe section 32, achieving multiple positions for fixing and fiber reinforcement of the second heat pipe section 32. This ensures the fixed setting of the second heat pipe section 32 and the inclination of each pipe 325, thereby ensuring the smooth flow of the working fluid and preventing the gravity heat pipe 30 from failing.

[0064] Optionally, the third pipe section 321 is fixed and limited by the first fixing bar 41 and the third fixing bar 43.

[0065] Optionally, the fourth pipe section 322 is fixed and limited by the second fixing bar 42 and the fourth fixing bar 44.

[0066] Optionally, the third fixing strip 43 and the fourth fixing strip 44 extend to the top wall 11 of the inner liner 10. In this way, the third fixing strip 43 and the fourth fixing strip 44 can also fix and limit the second heat pipe section 32 at the top, especially the top heat pipe section 323, to prevent the top heat pipe section 323 from moving or deforming.

[0067] Optionally, the refrigeration device further includes a fifth fixing strip 45 and a sixth fixing strip 46, which are located on the top wall 11 of the inner liner 10 and are used to fix the top heat pipe section of the second heat pipe section 32.

[0068] Optionally, the fifth fixing strip 45 intersects with and is fixed to the third top heat pipe section 323, and the sixth fixing strip 46 intersects with and is fixed to the fourth top heat pipe section.

[0069] Optionally, each fixing strip 40 is provided with a plurality of mounting slots 47 at intervals along its length.

[0070] Optionally, the fixing strip 40 is detachably connected to the inner liner 10, which facilitates the installation and removal of the fixing strip 40 and makes it easier to replace the fixing strip 40.

[0071] Optionally, the gravity heat pipe 30 is an integral bent structure.

[0072] In this embodiment, the gravity heat pipe 30 adopts an integrated bending structure, reducing the number of connection nodes between the first pipe section 311, the second pipe section 312, the third pipe section 321, and the fourth pipe section 322. This avoids the risk of refrigerant leakage due to poor sealing at the connection points, improving the structural sealing and reliability. Furthermore, the integrated structure ensures smooth flow within the pipe, reducing refrigerant flow resistance and, combined with a closed-loop circulation path, further improving cooling efficiency. Simultaneously, the bending process adapts to the shape and installation space of the inner liner 10, allowing the third pipe section 321 and the fourth pipe section 322 to fit more tightly against the wall of the inner liner 10. The cantilever layout of the first pipe section 311 and the second pipe section 312 is more rational, optimizing the cold air transfer effect and simplifying the processing technology, thus reducing production costs.

[0073] Optionally, the first heat pipe section 31 is made of a flexible material.

[0074] In this embodiment, the first heat pipe section 31 is made of a flexible material, which enhances the vibration damping effect of the double cantilever structure 315. The elastic deformation of the flexible material effectively absorbs the high-frequency vibration energy of the cold source 20, preventing vibration from being transmitted to the third and fourth pipe sections 321 and 322, thus minimizing the risk of breakage of the entire gravity heat pipe 30. Furthermore, the flexible material can accommodate minor deviations during installation, facilitating the assembly and connection of the cold source 20 with the first heat pipe section 31 and the second heat pipe section 32, improving assembly flexibility. Simultaneously, the flexible material maintains good mechanical properties even in ultra-low temperature environments, preventing failure due to low-temperature embrittlement and ensuring stable operation of the refrigeration device under ultra-low temperature conditions.

[0075] Alternatively, the flexible material can be a nickel-titanium shape memory alloy, ultrathin flexible stainless steel, beryllium copper alloy, perfluorinated elastomer, polytetrafluoroethylene reinforced composite material, low-temperature modified polyurethane elastomer, or silicon nitride fiber reinforced ceramic composite material.

[0076] In this embodiment, the flexible component of the first heat pipe section 31 needs to possess flexible vibration damping, sealing, and thermal conductivity properties. The flexible component is made of nickel-titanium shape memory alloy, which has a high elastic deformation rate at room temperature, possessing spring-like resilience to efficiently buffer the high-frequency reciprocating vibration of the cold source 20. Furthermore, it maintains good mechanical properties even at ultra-low temperatures of -196℃, with no risk of brittle fracture, making it suitable for ultra-low temperature refrigeration conditions. The passivation film on the surface of the nickel-titanium shape memory alloy is corrosion-resistant and compatible with the refrigerant inside the gravity heat pipe 30, eliminating the risk of chemical reactions. Its high thermal conductivity ensures effective transfer of cooling energy from the cold source 20 to the heat pipe section without hindering heat exchange of the working fluid. The first heat pipe section 31 can be made of ultra-thin flexible stainless steel, possessing excellent flexibility, allowing for bending and deformation to buffer vibration. It exhibits excellent ultra-low temperature resistance, strong corrosion resistance, and good welding / brazing compatibility with traditional copper heat pipes, ensuring the sealing of the connection points and preventing refrigerant leakage. It has high thermal conductivity, which is suitable for the cold air transfer requirements of gravity heat pipe 30, and the cost is relatively low, making it suitable for mass application.

[0077] Flexible materials can also be beryllium copper alloys, which have high elasticity and fatigue strength, can maintain shape stability after long-term high-frequency vibration, have strong vibration damping durability, high thermal conductivity, and can quickly transfer cold energy.

[0078] Flexible materials can also be perfluoroelastomers. Perfluoroelastomers have high flexibility and resilience, low compression set, and can buffer low-frequency vibrations for a long time. They also have resistance to ultra-low temperatures, completely covering the operating temperature range of refrigeration devices. They are chemically inert and do not react with refrigerants such as liquid ammonia and helium. They have excellent sealing performance and can be used as the body material or connecting sealing layer of cantilever structure 315.

[0079] The flexible material can be a polytetrafluoroethylene (PTFE) reinforced composite material, which has low-temperature resistance and corrosion resistance. Optionally, carbon fiber can be added to the PTFE reinforced composite material to improve flexibility and creep resistance, thereby enhancing vibration damping.

[0080] The flexible material can be a low-temperature modified polyurethane elastomer. The low-temperature modified polyurethane elastomer is modified with ether polyol, which can improve its low-temperature resistance and has good flexibility and vibration damping properties.

[0081] Flexible materials can be silicon nitride fiber reinforced ceramic composites. Silicon nitride fiber reinforced ceramic composites have good flexural strain, excellent flexibility and thermal shock resistance, as well as resistance to ultra-low temperatures, high thermal conductivity, strong chemical stability, and no risk of electrochemical corrosion.

[0082] Optionally, the cold source 20 can be a Stirling refrigerator, a pulse tube refrigerator, or a GM refrigerator.

[0083] The foregoing description and accompanying drawings fully illustrate embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A refrigeration device, characterized in that, include: Inner liner; The cold source is located above the inner liner; Gravity heat pipes are connected to a cold source and form a closed loop. The gravity heat pipe includes a first heat pipe section and a second heat pipe section. The first heat pipe section is connected between the second heat pipe section and the cold source. The second heat pipe section is coiled around the outer surface of the inner liner. The first heat pipe section is located above the inner liner and forms a cantilever structure.

2. The refrigeration device according to claim 1, characterized in that, The first heat pipe section is located between the cold source and the top wall of the inner liner, and the first heat pipe section is inclined relative to the vertical direction to form a cantilever structure.

3. The refrigeration device according to claim 1, characterized in that, The second heat pipe section includes: The top heat pipe section is connected to the first heat pipe section and is located on the top wall of the inner liner; The side heat pipe section is located on the side wall of the inner liner and is coiled vertically.

4. The refrigeration device according to claim 3, characterized in that, The side heat pipe section includes multiple pipes connected end to end, with the multiple pipes arranged at intervals from top to bottom, and one or more of the pipes inclined downwards.

5. The refrigeration device according to claim 3, characterized in that, The cantilever structure is located on the front side of the top wall of the inner liner. The front end of the top heat pipe section is connected to the cantilever structure, and the top heat pipe section extends from front to back to the rear side of the inner liner. The side heat pipe section is connected to the rear end of the top heat pipe section. The top wall of the inner liner slopes downwards from front to back.

6. The refrigeration device according to claim 3, characterized in that, The top heat pipe section slopes downwards in a direction away from the first heat pipe section.

7. The refrigeration device according to claim 1, characterized in that, The first heat pipe section includes a first pipe section and a second pipe section, and the second heat pipe section includes a third pipe section and a fourth pipe section. The first pipe section connects the third pipe section and the cold source, and the second pipe section connects the cold source and the fourth pipe section. The first and second pipe sections both form cantilever structures, and the third and fourth pipe sections are both coiled around the outside of the inner liner in a top-to-bottom direction.

8. The refrigeration device according to claim 7, characterized in that, The inner liner includes: First sidewall; The second sidewall is located on one side of the first sidewall; The third side wall is located on the other side of the first side wall and together with the first and second side walls, it encloses a refrigeration room with an opening, the opening being opposite to the first side wall. The third pipe section is coiled around the outside of the first and second side walls, and the fourth pipe section is coiled around the outside of the first and third side walls.

9. The refrigeration device according to claim 1, characterized in that, Also includes: A fixing strip is located on the outside of the inner liner and has an installation groove. Some of the gravity heat pipes are located in the mounting groove, which is used to restrict the movement of the gravity heat pipes.

10. The refrigeration apparatus according to any one of claims 1 to 9, characterized in that, Gravity heat pipes have an integrated bent structure; and / or, The first heat pipe section is made of flexible material.

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