Refrigeration device and medical equipment

Abstract

The invention relates to a refrigerating device and medical equipment, the refrigerating device comprises a container body, an interlayer assembly and an on-off mechanism, and the container body is provided with an interlayer space and an extraction opening communicated with the interlayer space; the interlayer assembly is arranged in the interlayer space and divides the interlayer space into a first cavity and a second cavity, and at least one through ventilation opening is formed in the interlayer assembly so that the first cavity can be communicated with the second cavity; the number of the on-off mechanisms corresponds to that of the air vents, the on-off mechanisms are arranged at the air vents, and the on-off mechanisms are configured to be capable of moving relative to the interlayer assembly so as to open or close the air vents. By means of the structural form, the efficiency of vacuumizing the interlayer space can be guaranteed, the heat preservation performance of the interlayer assembly can also be guaranteed, and therefore the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a refrigeration device and medical equipment. Background Art

[0002] Superconducting magnets in medical equipment are magnets made by utilizing the phenomenon that the resistance of superconducting materials decreases to zero at a certain temperature. The establishment of a superconducting environment for superconducting coils is usually done by injecting a large amount of refrigerant (usually liquid helium) into a cryogenic container assembly, and then immersing the superconducting coils in liquid helium to keep the coils in a low-temperature superconducting state.

[0003] In order to reduce the amount of external heat transferred to the interior of the cryogenic container, the cryogenic container is usually configured to have a vacuum interlayer structure, and a heat shielding layer is provided in the vacuum interlayer to shield the magnetic field and an insulating material layer is provided to improve the thermal insulation performance of the interior of the cryogenic container. The insulating material layer divides the vacuum interlayer into two parts. Although the insulating material layer has air permeability, the existence of this insulating material layer still seriously blocks the flow of gas molecules between the spaces on both sides of the insulating material layer. When establishing a superconducting environment, during the vacuum interlayer evacuation stage, the gas molecules in the space inside the insulating material layer are difficult to be extracted, resulting in low vacuum efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a refrigeration device and medical equipment to address the technical problem of low vacuum efficiency in refrigeration devices of superconducting magnets in medical equipment in the prior art.

[0005] A refrigeration device, comprising:

[0006] The container body is constructed with an interlayer space and an air extraction port connected to the interlayer space;

[0007] An interlayer component is disposed in the interlayer space and divides the interlayer space into a first cavity and a second cavity. The interlayer component is provided with at least one through vent so that the first cavity and the second cavity are connected;

[0008] The on-off mechanism corresponds to the number of the vents, and the on-off mechanism is arranged at the vents. The on-off mechanism is configured to be movable relative to the barrier assembly to open or close the vents.

[0009] In one embodiment, the on-off mechanism comprises:

[0010] A driving assembly connected to the barrier assembly;

[0011] A cover plate, connected to the driving assembly, and capable of covering the vent;

[0012] The driving assembly can exert force on the cover plate to move the cover plate toward the barrier assembly and close the vent; the driving assembly can also move the cover plate away from the barrier assembly to open the vent.

[0013] In one embodiment, the drive assembly comprises:

[0014] A reset member, one end of which is connected to the barrier assembly, and the other end of which is connected to the cover plate, wherein the reset member can provide a reset force for the cover plate to move closer to the barrier assembly;

[0015] A driving member is connected to the cover plate, and the driving member can overcome the restoring force of the restoring member and drive the cover plate to move in a direction away from the barrier assembly.

[0016] In one embodiment, the driving member comprises:

[0017] A first coil connected to the cover plate;

[0018] A second coil connected to the container body;

[0019] The first coil and the second coil are configured to generate a mutually attractive electromagnetic force between the two when powered on, so that the first coil drives the cover plate to move in a direction close to the second coil.

[0020] In one embodiment, the driving member is configured as one of a gas spring, an air bag or a bellows.

[0021] In one embodiment, the cover plate comprises:

[0022] A plate body connected to the driving assembly and capable of covering the vent;

[0023] A flange connected to the periphery of the plate body, the flange protruding toward the direction close to the layer assembly;

[0024] When the plate body moves toward the barrier layer assembly to close the vent, the flange abuts against the barrier layer assembly and fits with the barrier layer assembly.

[0025] In one embodiment, the on-off mechanism further includes a sub-insulation layer, the sub-insulation layer covers one side of the cover plate, and the periphery of the sub-insulation layer extends to the other side of the cover plate;

[0026] Wherein, when the cover plate closes the vent, the periphery of the sub-insulation layer is pressed between the cover plate and the barrier assembly.

[0027] In one embodiment, the periphery of the sub-insulation layer is connected to the barrier layer assembly, and a portion of the sub-insulation layer disposed between the barrier layer assembly and the cover plate is provided with a plurality of connecting holes.

[0028] Wherein, when the cover plate is moved away from the barrier assembly until the vent is opened, the connecting hole is used to connect the first cavity and the second cavity.

[0029] In one embodiment, the barrier assembly comprises:

[0030] A heat shielding layer, the heat shielding layer is arranged in the interlayer space and connected to the container body;

[0031] The heat-insulating layer is connected to the heat-shielding layer, and is used to isolate the heat transfer between the accommodating cavity of the container body and the interlayer space.

[0032] A medical device comprises the refrigeration device as described above.

[0033] Beneficial effects of the present invention:

[0034] The present invention provides a refrigeration device, wherein a container body is used to contain a cooling medium; and an interlayer space is constructed on the container body to set the interlayer space to a vacuum state, so that the cooling medium is isolated from the external atmosphere through the vacuum interlayer space. Since heat is transferred in a vacuum state by means of thermal radiation, the interlayer space is set to a vacuum state by setting the interlayer space and through an air extraction port, so as to insulate the cooling medium in the container body, thereby improving energy utilization efficiency. The air extraction port on the container body is used to connect with a vacuum pump to suck air in the interlayer space. By setting an interlayer assembly in the interlayer space, on the one hand, it is used to reflect the heat radiation from the outside to the container body, and on the other hand, it can also reduce the heat radiation from the outside to the inside of the container body, thereby insulating the cooling medium in the container body. A vent is set on the interlayer assembly, so that the first cavity and the second cavity obtained by isolating the interlayer space through the interlayer assembly are connected to each other, so as to improve the working efficiency when the first cavity and the second cavity are evacuated. By setting an on-off mechanism at the vent, and setting the on-off mechanism to be movable relative to the interlayer assembly, the vent can be opened or closed by the on-off mechanism. In this way, when the interlayer space is evacuated, the on-off mechanism is moved to open the vent to improve the efficiency of evacuating the interlayer space. When the vacuum degree in the interlayer space meets the requirements, the on-off mechanism is moved to close the vent to ensure the thermal insulation performance of the interlayer assembly. The above structural form can ensure both the efficiency of evacuating the interlayer space and the thermal insulation performance of the interlayer assembly, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of the structure of a refrigeration device provided in some embodiments of the present invention when the vent is in a closed state;

[0036] Figure 2 for Figure 1 An enlarged structural diagram of the on-off mechanism in FIG.

[0037] Figure 3 A schematic diagram of the structure of a refrigeration device provided in some embodiments of the present invention when the vent is in an open state;

[0038] Figure 4 for Figure 3 An enlarged structural diagram of the on-off mechanism in FIG.

[0039] Figure 5 A partially enlarged schematic diagram of an on / off mechanism in a refrigeration device provided in some embodiments of the present invention;

[0040] Figure 6 A partially enlarged schematic diagram of another structure of an on-off mechanism in a refrigeration device provided in some embodiments of the present invention;

[0041] Figure 7 A partially enlarged schematic diagram of an insulation layer in a refrigeration device provided in one embodiment of the present invention.

[0042] Reference numerals:

[0043] Container body 100; interlayer space 110; first cavity 111; second cavity 112; exhaust port 120; interlayer assembly 200; vent 210; heat shielding layer 220; insulation layer 230; reflective material layer 231; insulation material layer 232; on-off mechanism 300; drive assembly 310; reset member 311; drive member 312; first coil 3121; second coil 3122; cover plate 320; plate body 321; flange 322; sub-insulation layer 330; superconducting coil 400; cooling medium 500. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0050] See also Figures 1 to 6 An embodiment of the present invention provides a refrigeration device, which includes a container body 100, an interlayer assembly 200 and an on-off mechanism 300. The container body 100 is configured with an interlayer space 110 and an air extraction port 120 connected to the interlayer space 110; the interlayer assembly 200 is arranged in the interlayer space 110, and divides the interlayer space 110 into a first cavity 111 and a second cavity 112. At least one through vent 210 is configured on the interlayer assembly 200 to connect the first cavity 111 and the second cavity 112; the number of the on-off mechanism 300 corresponds to the number of the vents 210, the on-off mechanism 300 is arranged at the vent 210, and the on-off mechanism 300 is configured to be able to move relative to the interlayer assembly 200 to open or close the vent 210.

[0051] The present technical solution provides a refrigeration device, wherein the container body 100 is used to contain the cooling medium 500; and an interlayer space 110 is constructed on the container body 100 to set the interlayer space 110 to a vacuum state, so that the cooling medium 500 is isolated from the external atmosphere through the vacuum interlayer space 110. Since heat is transferred in a vacuum state by means of thermal radiation, the interlayer space 110 is set to a vacuum state through the air extraction port 120 to keep the cooling medium 500 in the container body 100 warm, so as to improve the energy utilization efficiency. The air extraction port 120 on the container body 100 is used to connect with a vacuum pump to suck the air in the interlayer space 110. By setting the interlayer assembly 200 in the interlayer space 110, on the one hand, it is used to reflect the heat radiation from the outside to the inside of the container body 100, and on the other hand, it can also reduce the heat radiation from the outside to the inside of the container body 100, thereby keeping the cooling medium 500 in the container body 100 warm. The vent 210 is provided on the interlayer assembly 200 so that the first cavity 111 and the second cavity 112 obtained by isolating the interlayer space 110 through the interlayer assembly 200 are connected to each other, so as to improve the working efficiency when the first cavity 111 and the second cavity 112 are evacuated. By providing an on-off mechanism 300 at the vent 210 and setting the on-off mechanism 300 to be movable relative to the interlayer assembly 200, the vent 210 can be opened or closed by the on-off mechanism 300. Figure 3and Figure 4 As shown, when the interlayer space 110 is evacuated, the on-off mechanism 300 is moved to open the vent 210 to improve the efficiency of evacuating the interlayer space 110. Figure 1 and Figure 2 As shown, when the vacuum degree in the interlayer space 110 meets the requirement, the vent 210 is closed by moving the on-off mechanism 300 to ensure the thermal insulation performance of the interlayer assembly 200. The above structure can ensure the efficiency of vacuuming the interlayer space 110 and the thermal insulation performance of the interlayer assembly 200, thereby improving production efficiency.

[0052] It should be noted that the material of the container body 100 can be carbon steel, stainless steel, etc. The container body 100 includes an inner container for holding the cooling medium 500, and an outer container arranged outside the inner container, and the outer wall of the inner container and the inner wall of the outer container are spaced apart to define the interlayer space 110 described above. In addition to holding the cooling medium 500, the inner container is also used to place workpieces that need to be cold-treated, such as the superconducting coil 400. Of course, other workpieces that need to be cold-treated can also be used. The present invention is described by taking the refrigeration device used for the superconducting coil 400 as an example.

[0053] like Figures 1 to 4 As shown, in one embodiment, the interlayer assembly 200 includes a heat shielding layer 220 and a heat insulating layer 230. The heat shielding layer 220 is arranged in the interlayer space 110 and connected to the container body 100; the heat insulating layer 230 is connected to the heat shielding layer 220, and the heat insulating layer 230 is used to isolate the heat transfer between the accommodating cavity of the container body 100 and the interlayer space 110. The heat shielding layer 220 is used to reflect the heat radiation from the outside to the inner container, and the heat insulating layer 230 is used to reduce the heat radiation from the outer container to the inner container. The heat shielding layer 220 and the heat insulating layer 230 can be fixed by bonding. The interlayer assembly 200 is arranged in the interlayer space 110 and surrounded by the outer periphery of the inner container.

[0054] Specifically, Figure 7 As shown, the heat insulating layer 230 is a multi-layer structure, usually including a plurality of reflective material layers 231 spaced apart and a heat insulating material layer 232 disposed between two adjacent reflective material layers 231. The heat insulating material layer 232 disposed between two adjacent reflective material layers 231 is usually multi-layered, which makes the number of layers of the heat insulating material layer 232 greater than the number of layers of the reflective material layer 231. Such a configuration enables the heat insulating layer 230 to form a multi-level heat cutoff, thereby improving the heat insulating performance. The reflective material layer 231 can be made of, for example, an aluminum-plated polyester film, and the heat insulating material layer 232 can be a glass fiber film. The two material layers have unevenly distributed sparse grooves, air holes and other structures, so that gas molecules located on both sides of the barrier assembly 200 can pass through.

[0055] In order to reduce the convective heat transfer from the outer container to the inner container, a high vacuum needs to be maintained in the interlayer space 110 formed by the two. Usually, the air extraction port 120 is set at the bottom of the outer container, and the air extraction port 120 is used to connect to a vacuum pump to evacuate the interlayer space 110. Before the superconducting coil 400 is cryogenically treated, that is, before the condensed liquid helium is poured into the inner container, the gas in the interlayer space 110 needs to be extracted from the air extraction port 120 in advance by a vacuum pump or other equipment. After forming a high vacuum, the air extraction port 120 is blocked and sealed by a sealing member to prevent external gas from entering the interlayer space 110 from the air extraction port 120 and destroying the vacuum degree in the interlayer space 110.

[0056] like Figures 1 to 4 As shown, in this embodiment, the vent 210 on the interlayer assembly 200 is arranged near the corresponding air extraction port 120 of the outer container, so that the path between the vent 210 and the air extraction port 120 can be shortened, thereby improving the efficiency of vacuuming. The number of the vent 210 can be one, two or more; the opening size of the vent 210 can be set according to actual needs.

[0057] The specific structure of the on-off mechanism 300 may be in the following form:

[0058] like Figure 2 and Figure 4 As shown, in one embodiment, the on-off mechanism 300 includes a drive component 310 and a cover plate 320, the drive component 310 is connected to the partition component 200; the cover plate 320 is connected to the drive component 310, and the cover plate 320 can cover the vent 210; wherein the drive component 310 can exert force on the cover plate 320 to move the cover plate 320 toward the partition component 200 and close the vent 210; the drive component 310 can also move the cover plate 320 away from the partition component 200 to open the vent 210.

[0059] The driving assembly 310 is connected to the interlayer assembly 200 and the cover plate 320 so that the driving assembly 310 drives the cover plate 320 to move so as to close or open the vent 210. Specifically, when the interlayer space 110 needs to be evacuated, the driving assembly 310 drives the cover plate 320 to move in a direction away from the interlayer assembly 200 so that the vent 210 is opened. At this time, the first cavity 111 and the second cavity 112 located between the interlayer assembly 200 are connected. When the interlayer space 110 is evacuated by a vacuum pump, the air in the first cavity 111 can flow through the opened vent 210, thereby improving the efficiency of evacuating the interlayer space 110. When the vacuum degree in the interlayer space 110 meets the requirement, the cover 320 is driven by the driving component 310 to close the vent 210. At this time, the first cavity 111 and the second cavity 112 are isolated by the cover 320 and the interlayer component 200. In this way, the heat transfer between the first cavity 111 and the second cavity 112 can be reduced, which is beneficial to improve the thermal insulation performance of the interlayer space 110 and the interlayer component 200 to the inner container, thereby improving the heat utilization efficiency.

[0060] It is understandable that in order to ensure the sealing effect of the vent 210, the size of the cover plate 320 should be larger than the size of the vent 210, so that the entire vent 210 can be covered, thereby achieving the closure of the vent 210. There is no limitation on the structural form of the vent 210, which can be circular, oval, square, etc. Of course, the shape of the cover plate 320 can be the same as that of the vent 210, or different from that of the vent 210, as long as the vent 210 can be closed.

[0061] like Figure 2 and Figure 4 As shown, in one embodiment, the driving assembly 310 includes a reset member 311 and a driving member 312. One end of the reset member 311 is connected to the barrier assembly 200, and the other end is connected to the cover plate 320. The reset member 311 can provide a reset force for the cover plate 320 to move toward the barrier assembly 200; the driving member 312 is connected to the cover plate 320, and the driving member 312 can overcome the reset force of the reset member 311 and drive the cover plate 320 to move in a direction away from the barrier assembly 200. The reset force provided by the reset member 311 to the cover plate 320 causes the cover plate 320 to move toward the barrier assembly 200, so as to close the vent 210. The driver 312 overcomes the reset force of the reset member 311 to drive the cover plate 320 to move in a direction away from the barrier assembly, so as to open the vent 210.

[0062] It should be noted that, in this embodiment, the reset member 311 has telescopic and limiting capabilities and is a non-sealed body, such as a spring or a slide bar. The driving member 312 has an on-off control switch, and the driving member 312 cooperates with the reset member 311 to realize the movement of the cover plate 320 away from or close to the barrier assembly 200. The maximum relative distance between the cover plate 320 and the barrier assembly 200 is determined by the reset member 311 and can be within the range of 1-30 mm.

[0063] For example, when the reset member 311 is a spring, one end of the spring extends into the vent 210 and is fixedly connected to the interlayer assembly 200, and the other end of the spring is fixedly connected to the side of the cover plate 320 facing the interlayer assembly 200. When the vent 210 needs to be opened, the on-off control switch is turned on so that the drive member 312 can overcome the elastic force of the spring and drive the cover plate 320 to separate from the interlayer assembly 200, so that the vent 210 is opened. When the vacuum degree in the interlayer space reaches the requirement, the on-off control switch can be turned off, and the driving force on the drive member 312 is canceled. The cover plate 320 moves toward the direction close to the interlayer assembly 200 under the elastic force of the spring, so that the cover plate 320 covers the vent 210.

[0064] like Figure 2 and Figure 4 As shown, in one embodiment, the driving member 312 includes a first coil 3121 and a second coil 3122, wherein the first coil 3121 is connected to the cover plate 320; and the second coil 3122 is connected to the container body 100; wherein the first coil 3121 and the second coil 3122 are configured to generate an electromagnetic force of mutual attraction between the two when powered on, so that the first coil 3121 drives the cover plate 320 to move in a direction close to the second coil 3122. In this way, by controlling the on and off of the first coil 3121 and coordinating with the reset member 311, the relative movement of the cover plate 320 relative to the interlayer assembly 200 can be achieved. Specifically, when it is necessary to evacuate the interlayer space 110, the on and off control switch is turned on to energize the first coil 3121. When the first coil 3121 is powered on, the electromagnetic force generated by the first coil 3121 is opposite in polarity to the electromagnetic force of the second coil 3122, which causes the first coil 3121 to move in a direction close to the second coil 3122. Since the first coil 3121 is connected to the cover plate 320, the cover plate 320 can move toward the second coil 3122 under the force of the first coil 3121, thereby opening the vent 210. When the on-off control switch is turned off, no current flows through the first coil 3121 and the second coil 3122, the electromagnetic force disappears, and the cover plate 320 moves toward the barrier assembly 200 under the elastic force of the spring to cover the vent 210.

[0065] It should be noted that the second coil 3122 can be fixed on the inner container or the outer container at a position corresponding to the cover plate 320. For example, when the second coil 3122 is fixed on the outer container, the vent 210 can be set at a position corresponding to the air extraction port 120, so that the second coil 3122 can be set on the pipe connected to the vacuum pump on the air extraction port 120. Of course, the second coil 3122 can be set in a form of detachable connection with the pipe. When the vent 210 needs to be opened, the second coil 3122 can be fixed at the air extraction port 120. When the vacuum is exhausted and the vent 210 needs to be closed, the second coil 3122 can be removed from the air extraction port 120.

[0066] In one embodiment, the driving member 312 is configured as one of a gas spring, an air bag or a bellows. For example, when the driving member 312 is an air bag, when the vent 210 needs to be opened, the air bag can be inflated, and the air bag gradually expands during the inflation process to drive the cover plate 320 to move away from the barrier assembly 200; when the vent 210 needs to be closed, the gas in the air bag is released, so that the cover plate 320 moves towards the barrier assembly 200 under the elastic force of the spring.

[0067] like Figure 5 As shown, in one embodiment, the cover plate 320 includes a plate body 321 and a flange 322, the plate body 321 is connected to the drive assembly 310 and can cover the vent 210; the flange 322 is connected to the periphery of the plate body 321, and the flange 322 protrudes toward the isolation assembly 200; wherein, when the plate body 321 moves toward the barrier assembly 200 to close the vent 210, the flange 322 abuts against the barrier assembly 200 and fits with the barrier assembly 200. The vent 210 is covered by the plate body 321 to achieve closure of the vent 210; a flange 322 is provided on the plate body 321, so that when the cover plate 320 is pressed against the barrier assembly 200, the strength of the flange 322 acting on the barrier assembly 200 can be increased, so that there is no light-transmitting gap between the cover plate 320 and the barrier assembly 200, thereby further reducing the heat radiation from the outer container to the inner container, thereby improving the thermal insulation effect.

[0068] Specifically, Figure 2 , Figure 4 and Figure 5As shown, in this embodiment, a circle of flanges 322 are arranged around the entire periphery of the plate body 321, and the end of the flange 322 away from the plate body 321 is set to an irregular shape. More specifically, in the radial direction of the cover plate 320, the flange 322 is set to be higher on the outside, slightly lower on the inside than on the outside, and to form a concave shape in the middle. In this way, when the flange 322 is pressed on the insulation layer 230 outside the heat shielding layer 220, a plurality of curved contact surfaces are formed between the flange 322 and the insulation layer 230, so that the red rays radiated from the outside to the inside have to go through a plurality of curved paths, the paths are longer, and they will also go through more reflections on a plurality of curved surfaces, so that the heat radiation energy can be reduced more, thereby further improving the thermal insulation performance.

[0069] like Figure 5 As shown, an accommodating groove is provided between the plate body 321 and the flange 322, and the first coil 3121 is fixedly connected in the accommodating groove. The reset member 311 is connected to the plate body 321 at a position avoiding the accommodating groove. The height of the flange 322 can be set between 1-20 mm.

[0070] It is understandable that the plate body 321 can be connected to the barrier assembly 200 only through the reset member 311. In this way, the movement of the plate body 321 relative to the barrier assembly 200 is the movement of the entire plate body 321 away from or close to the barrier assembly 200. Figure 6 As shown, in another embodiment, one end of the cover plate 320 is hinged to the barrier assembly 200, and the other end of the cover plate 320 is free, so that it does not translate relative to the heat shielding layer 220, but rotates with the hinged end as a fulcrum; at this time, the free end of the cover plate 320 is controlled to rotate relative to the fulcrum by the reset member 311 and the drive member 312, thereby realizing the closing or opening of the vent 210.

[0071] like Figure 5As shown, in one embodiment, the on-off mechanism 300 further includes a sub-insulating layer 330, which covers one side of the cover plate 320, and the periphery of the sub-insulating layer 330 extends to the other side of the cover plate 320; wherein, when the cover plate 320 closes the vent 210, the periphery of the sub-insulating layer 330 is pressed between the cover plate 320 and the barrier assembly 200. The specific structure and material of the sub-insulating layer 330 are consistent with the structure and material of the barrier assembly 200 described above. The sub-insulating layer 330 covers and clings to the surface of the plate body 321 away from the barrier assembly 200, and the edge of the sub-insulating layer 330 extends to the surface of the plate body 321 facing the barrier assembly 200, and the sub-insulating layer 330 can completely cover the flange 322. In this way, when the cover plate 320 is against the barrier assembly 200, the flange 322 can be pressed against the sub-insulating layer 330 and the barrier assembly 200. It should be noted that the force of the cover plate 320 pressing the sub-insulation layer 330 and the interlayer assembly 200 should not be too large. If the cover plate 320 presses the sub-insulation layer 330 and the interlayer assembly 200 too tightly, the interlayer heat conduction between the sub-insulation layer 330 and the interlayer assembly will increase. The pressing force on the cover plate 320 can be achieved by selecting the elastic force of the reset member 311, that is, the spring.

[0072] In one embodiment, the periphery of the sub-insulation layer 330 is connected to the barrier assembly 200, and a portion of the sub-insulation layer 330 between the barrier assembly 200 and the cover plate 320 is provided with a plurality of connecting holes, wherein when the cover plate 320 is away from the barrier assembly 200 until the vent 210 is opened, the connecting holes are used to connect the first cavity 111 and the second cavity 112. Specifically, the sub-insulating layer 330 and the interlayer assembly 200 can be a whole, or they can be pre-connected together so that a "neck"-like structure is formed at the vent, and a number of connecting holes are also provided on the "neck". When the cover plate 320 presses the interlayer assembly 200, the sub-insulating layer 330 at the "neck" forms wrinkles, which naturally closes the connecting holes, and the sub-insulating layer 330 at this location is finally closed by the flange 322 on the cover plate 320, which can significantly reduce the heat radiation from the outside to the inner container; when vacuuming, the driving member 312 drives the cover plate 320 to move away from the interlayer assembly 200, and the connecting holes on the sub-insulating layer 330 are connected with the vent 210 on the interlayer assembly 200, so that the first cavity 111 and the second cavity 112 are connected through the connecting holes and the vent 210, which can speed up the vacuuming speed.

[0073] The on-off mechanism 300 in the embodiment of the present invention is not only used in the vacuuming process of the container body 100, but also in the pre-cooling and rewarming process of the container body 100; in these processes, a certain amount of gas is often introduced into the vacuum cavity to accelerate the heat exchange by the convection of gas molecules, but the heat shielding layer 220 and the insulation layer 230 are like a quilt, which separates the interlayer space 110 into the first cavity 111 and the second cavity 112, and at the same time blocks the molecular convection of the two cavities; using the on-off mechanism 300 in the embodiment of the present invention, the molecular convection of the cavity can be accelerated, thereby accelerating the heat exchange process.

[0074] It should be noted that, in general, since the superconducting coil 400 has a strong magnetic field when working, it will interact with the first coil 3121 and the second coil 3122 in the driving member 312 to affect its movement. Therefore, the energized coil of the driving member 312 is only used when the vacuum operation is performed before the superconducting coil 400 is excited, and in most cases, it does not need to be energized. At this time, it mainly relies on the reset member 311, that is, the elastic force or pre-tightening force of the spring to drive the cover plate 320 to move. After the vacuum process is completed, the coil current on the driving member 312 is disconnected, and the preset elastic force of the reset member 311 drives the cover plate 320 to approach and cling to the outer side of the thermal shielding layer 220 and the insulation layer 230. At this time, the cover plate 320 completely covers the vent on the barrier assembly 200.

[0075] An embodiment of the present invention further provides a medical device, which includes the above refrigeration device. The above refrigeration device is used in the medical device to ensure the efficiency of vacuuming the interlayer space 110 and the thermal insulation performance of the interlayer assembly 200, thereby improving production efficiency. In this embodiment, the medical device can be a nuclear magnetic resonance device.

[0076] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0077] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A refrigeration device, characterized in that: The refrigeration device comprises: The container body is constructed with an interlayer space and an air extraction port connected to the interlayer space; An interlayer component is disposed in the interlayer space and divides the interlayer space into a first cavity and a second cavity. The interlayer component is provided with at least one through vent so that the first cavity and the second cavity are connected; The on-off mechanism corresponds to the number of the vents, and the on-off mechanism is arranged at the vents. The on-off mechanism is configured to be movable relative to the barrier assembly to open or close the vents.

2. The refrigeration device according to claim 1, characterized in that: The on-off mechanism (300) comprises: A driving assembly connected to the barrier assembly; A cover plate, connected to the driving assembly, and capable of covering the vent; The driving assembly can exert force on the cover plate to move the cover plate toward the barrier assembly and close the vent; the driving assembly can also move the cover plate away from the barrier assembly to open the vent.

3. The refrigeration device according to claim 2, characterized in that: The drive assembly comprises: A reset member, one end of which is connected to the barrier assembly, and the other end of which is connected to the cover plate, wherein the reset member can provide a reset force for the cover plate to move closer to the barrier assembly; A driving member is connected to the cover plate, and the driving member can overcome the restoring force of the restoring member and drive the cover plate to move in a direction away from the barrier assembly.

4. The refrigeration device according to claim 3, characterized in that: The driving member comprises: A first coil connected to the cover plate; A second coil connected to the container body; The first coil and the second coil are configured to generate a mutually attractive electromagnetic force between the two when powered on, so that the first coil drives the cover plate to move in a direction close to the second coil.

5. The refrigeration device according to claim 3, characterized in that: The driving member is configured as one of a gas spring, an air bag or a bellows.

6. The refrigeration device according to claim 2, characterized in that: The cover plate comprises: A plate body connected to the driving assembly and capable of covering the vent; A flange connected to the periphery of the plate body, the flange protruding toward the direction close to the barrier assembly; When the plate body moves toward the barrier layer assembly to close the vent, the flange abuts against the barrier layer assembly and fits with the barrier layer assembly.

7. The refrigeration device according to claim 2, characterized in that: The on-off mechanism further includes a sub-insulation layer, the sub-insulation layer covers one side of the cover plate, and the periphery of the sub-insulation layer extends to the other side of the cover plate; Wherein, when the cover plate closes the vent, the periphery of the sub-insulation layer is pressed between the cover plate and the barrier assembly.

8. The refrigeration device according to claim 7, characterized in that: The periphery of the sub-insulation layer is connected to the barrier layer assembly, and a portion of the sub-insulation layer disposed between the barrier layer assembly and the cover plate is provided with a plurality of communication holes. Wherein, when the cover plate is away from the barrier assembly so that the vent is open, the connecting hole is used to connect the first cavity and the second cavity.

9. The refrigeration device according to any one of claims 1 to 8, characterized in that: The barrier assembly comprises: A heat shielding layer, the heat shielding layer is arranged in the interlayer space and connected to the container body; The heat-insulating layer is connected to the heat-shielding layer, and is used to isolate the heat transfer between the accommodating cavity of the container body and the interlayer space.

10. A medical device, characterized in that: The medical device comprises a refrigeration device as claimed in any one of claims 1 to 9.

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