CN218955924U - Low temperature detection equipment and low temperature detection system - Google Patents

Abstract

The application discloses low temperature detection equipment and low temperature detection system belongs to the refrigeration technology field. The disclosed low-temperature detection equipment comprises a cold storage device, a shell, a cover body and a refrigeration type infrared detector, wherein the shell is provided with a first mounting hole, and the cold storage device is arranged in the shell; the refrigeration type infrared detector is connected with the cold storage device in a heat conduction way; the cover body has installation state and dismantlement state, and under the installation state, the cover body detachably installs in the shell, and seals first mounting hole, and under the dismantlement state, the cover body separates with the shell, and first mounting hole is opened, and is used for with the butt joint of refrigeration piece. The scheme solves the problem that the cold storage device is easy to frost or ice after the cold storage device is refrigerated by the refrigerating piece in the related technology.

Description

Low temperature detection equipment and low temperature detection system

Technical Field

The application belongs to the technical field of refrigeration, and particularly relates to low-temperature detection equipment and a low-temperature detection system.

Background

The low-temperature detection system comprises a refrigeration piece and a cold storage device, wherein the refrigeration piece is used for refrigerating the cold storage device, and the cold storage device can be used for refrigerating the refrigeration type infrared detector within a certain time after storing enough cold.

Because the refrigerated cold storage is in a low temperature state, water vapor in the atmosphere is continuously condensed on the cold storage to form frost and even ice cubes, the weight of the cold storage can be increased, accumulated water can be formed after the temperature of the frost and even ice cubes is increased, inconvenience is brought to the work of the cold storage, the frost or ice cubes can influence the reassembly of the refrigerating piece and the cold storage, and the heat conduction efficiency between the reassembled refrigerating piece and the cold storage can be reduced.

Disclosure of Invention

An object of the embodiment of the application is to provide a low temperature detection device and a low temperature detection system, which can solve the problem that in the related art, after a refrigeration part is used for refrigerating a cold storage device, the cold storage device is easy to frost or freeze.

In order to solve the technical problems, the application is realized as follows:

the embodiment of the application provides low-temperature detection equipment, which comprises a cold storage device, a shell, a cover body and a refrigeration type infrared detector;

the shell is provided with a first mounting hole, and the storage Leng Qi is arranged in the shell; the refrigeration type infrared detector is connected with the cold storage device in a heat conduction way; the cover body has an installation state and a disassembly state;

in the mounted state, the cover body is detachably mounted on the shell and seals the first mounting hole;

in the disassembled state, the cover body is separated from the shell, and the first mounting hole is opened and is used for being in butt joint with the refrigerating piece.

The embodiment of the application also provides a low-temperature detection system which comprises the refrigerating piece and the low-temperature detection equipment.

In this application embodiment, in the shell was located to the cold accumulator, after refrigerating the cold accumulator, through the first mounting hole of lid shutoff shell, the external environment of isolation shell and the internal environment of shell reduce the air in the shell external environment and get into in the shell to alleviate the problem that the inner wall of shell and the outer wall of cold accumulator produced frost, ice. Therefore, the low-temperature detection equipment disclosed by the embodiment of the application can solve the problem that the cold storage device is easy to frost or freeze after the cold storage device is refrigerated by the refrigerating piece in the related technology.

In addition, in the process of refrigerating the cold storage device, the first mounting hole of the shell can be plugged by utilizing the refrigerating piece, so that the air in the external environment of the shell can be reduced to enter the interior of the shell, and the problems that frost and ice are generated on the inner wall of the shell and the outer wall of the cold storage device are relieved.

Drawings

Fig. 1 is a cross-sectional view of a low temperature detection apparatus in an installed state as disclosed in an embodiment of the present application;

FIG. 2 is a cross-sectional view of a cryogenic detection device in a disassembled state as disclosed in an embodiment of the present application;

FIG. 3 is a top view showing a part of the structure of a low temperature detecting apparatus according to an embodiment of the present application;

fig. 4 is an enlarged view at a in fig. 2.

100-refrigerating piece, 110-second connecting part, 120-cold head,

200-cold storage device, 210-connecting seat, 211-concave part,

300-shell, 310-accommodating space, 320-first connecting part, 330-optical window, 340-first mounting hole, 400-pipe fitting, 410-closed pipe cavity, 420-sealing piece, 421-protruding part,

500-cover body,

610-vacuumizing tube, 620-input tube, 630-output tube, 640-pressure release tube,

700-a second vacuumizing valve,

800-supporting structural member,

900-refrigeration type infrared detector.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.

As shown in fig. 1 to 4, the present application discloses a low temperature detection apparatus including a storage Leng Qi 200, a case 300, a cover 500, and a refrigerating type infrared detector 900.

The shell 300 is provided with a first mounting hole 340, the storage Leng Qi 200 is arranged in the shell 300, the cold storage 200 is used for storing cold energy or releasing cold energy, the refrigeration type infrared detector 900 is connected with the cold storage 200 in a heat conduction mode, and the cold storage 200 releases cold energy to provide a low-temperature environment required by the work of the refrigeration type infrared detector 900.

There are various ways of implementing the heat conduction connection between the refrigeration type infrared detector 900 and the cold storage device 200, and in an alternative embodiment, the refrigeration type infrared detector 900 may be disposed on an outer wall of the shell 300, and the refrigeration type infrared detector 900 is indirectly contacted with the cold storage device 200 through a shell wall of the shell 300, so as to implement the heat conduction connection between the refrigeration type infrared detector 900 and the cold storage device 200. In another alternative embodiment, the shell 300 may be provided with a second mounting hole, the refrigeration type infrared detector 900 may be in plugging fit with the second mounting hole, and the refrigeration type infrared detector 900 is directly contacted with the cold storage 200, so as to realize heat conduction between the refrigeration type infrared detector 900 and the cold storage 200.

In this embodiment of the application, the refrigeration type infrared detector 900 may be disposed in the shell 300 and directly fixed on the cold storage 200, so as to realize heat conduction connection between the refrigeration type infrared detector 900 and the cold storage 200, and the shell 300 may have the optical window 330, where the refrigeration type infrared detector 900 is opposite to the optical window 330, so that the refrigeration type infrared detector 900 can perform infrared detection. In this case, the shell 300 can play a role of protecting the refrigeration type infrared detector 900, and meanwhile, the refrigeration type infrared detector 900 is more convenient to be directly connected with the cold storage 200, so that the cold energy loss is reduced.

The refrigeration type infrared detector 900 can be fixed on the cold storage device 200 through the screw, also can be on the cold storage device 200 through joint structure joint, and the material of light window 330 can be K9 glass or sapphire etc. of course, and the material of light window 330 can be adjusted according to actual demand, and this application does not limit the specific material of light window 330, and light window 330 can be fixed on shell 300 through welded mode, of course, in other embodiments, light window 330 can be fixed on shell 300 by bonding.

The cover 500 has an installation state in which the cover 500 is detachably installed to the case 300 and seals the first installation hole 340, and a removal state.

In this case, the cover 500 seals the first mounting hole 340 to isolate the external environment of the shell 300 and the internal environment of the shell 300, so that air in the external environment of the shell 300 is reduced to enter the shell 300, frost and ice generated on the inner wall of the shell 300 and the outer wall of the cold storage device 200 are relieved, convection heat leakage between the cold storage device Leng Qi and the external environment of the shell 300 can be reduced, the cold loss rate of the cold storage device 200 is reduced, and the time for which the cold storage device 200 can maintain the operation of the refrigeration type infrared detector 900 after the cold storage device 200 is cooled is prolonged.

In the disassembled state, the cover 500 is separated from the case 300, the first mounting hole 340 is opened, and is used for docking with the refrigerating unit 100, and the refrigerating unit 100 can generate cold for refrigerating.

In this case, when the refrigerator 200 needs to be cooled, the first mounting hole 340 may be plugged by the cooling element 100, and a part of the structure (for example, the cold head 120) of the cooling element 100 passes through the first mounting hole 340 and stretches into the shell 300 and is connected with the refrigerator 200 in a heat conduction manner, so that the cooling element 100 can cool the refrigerator 200, and the refrigerator 200 stores cooling capacity, and the refrigerator Leng Qi can cool the cooling type infrared detector 900 within a certain time after storing enough cooling capacity.

In this embodiment, the storage Leng Qi 200 is disposed in the shell 300, and after the cooling of the cooling device 200, the first mounting hole 340 of the shell 300 is sealed by the cover 500, so as to isolate the external environment of the shell 300 from the internal environment of the shell 300, and reduce the air in the external environment of the shell 300 from entering the shell 300, thereby alleviating the problem of frost and ice generated on the inner wall of the shell 300 and the outer wall of the cooling device 200. Therefore, the present application can solve the problem that the storage Leng Qi 200 is prone to frost or ice formation after the refrigeration unit 100 is used to refrigerate the cold storage 200 in the related art.

In addition, in the process of refrigerating the cold storage 200 by using the refrigerating element 100, the first mounting hole 340 of the shell 300 can be blocked by using the refrigerating element 100, so that the air in the environment outside the shell 300 can be reduced to enter the shell 300, and the problems of frost and ice generated on the inner wall of the shell 300 and the outer wall of the cold storage 200 can be relieved.

The low temperature detecting device may further include a pipe 400, the pipe 400 may be disposed in the shell 300, a first pipe orifice of the pipe 400 may be in sealing connection with the first mounting hole 340, a second pipe orifice of the pipe 400 may be plugged with a plugging member 420, the plugging member 420 may be connected with the cold storage device 200, the pipe 400, the plugging member 420 and the shell 300 may enclose an accommodating space 310, and the Chu Lengqi 200 is disposed in the accommodating space 310. In the installed state, at least the cap 500, the tube 400 and the blocking member 420 enclose a closed lumen 410, and the closed lumen 410 is isolated from the accommodation space 310.

In this case, the closed lumen 410 is isolated from the receiving space 310 such that the receiving space 310 is isolated from the external environment of the case 300 by the pipe 400, which can alleviate the problem of frost formation on the cold storage 200 during installation of the cold storage 100 or the cover 500 on the case 300 or during separation of the cold storage 100 or the cover 500 from the case 300, in which air in the external environment of the case 300 enters into the receiving space 310.

When the refrigerating member 100 is mounted on the shell 300, a part of the structure of the refrigerating member 100 may extend into the lumen of the pipe member 400 and be in heat conduction contact with the blocking member 420, and the blocking member 420 is in heat conduction contact with the cold storage device 200, so that the refrigerating member 100 is in heat conduction contact with the cold storage device 200 through the blocking member 420 to refrigerate the cold storage device 200. Under this kind of structure, after refrigerating the cold storage 200, the temperature of the shutoff piece 420 with refrigeration piece 100 direct contact is lower, and the lid 500, pipe fitting 400 and shutoff piece 420 in this application embodiment enclose into sealed lumen 410, can reduce the air in the external environment and get into sealed lumen 410 in, alleviate the problem that produces frost, ice in the sealed lumen 410, avoid because the inner wall of pipe fitting 400 or on shutoff piece 420 produce frost, ice, and influence the reassembling of refrigeration piece 100 and low temperature detection equipment to and influence the problem of cold energy transfer efficiency between refrigeration piece 100 and the cold storage 200.

In a further embodiment, the blocking member 420 may be separated from the cold reservoir 200 in the installed state. The blocking member 420 is separated from the cold storage device 200, so that the cold storage device 200 can be prevented from generating cold influence on the pipe 400 as much as possible, and frost, ice and the like are easy to generate in the pipe 400. The plugging member 420 is separated from the cold storage device 200, so that conduction heat leakage between the cold storage Leng Qi and the plugging member 420 can be reduced, the cold loss of the cold storage device 200 can be slowed down, and the working time of the refrigeration type infrared detector 900 can be maintained by the cold storage device 200 after the cold storage device 200 is refrigerated.

Specifically, the pipe 400 may be an elastic pipe, and when the cooling element 100 is connected to the low temperature detecting device in the disassembled state, a part of the structure of the cooling element 100 passes through the first mounting hole 340 to abut against the blocking element 420, so that the elastic pipe is in an elongated state and contacts with the cold storage 200 through the blocking element 420. In the installed state, the elastic tube is retracted, and the elastic tube is in a shortened state, so that the blocking member 420 is separated from the cold reservoir 200.

Further, the elastic tube can be a corrugated tube, the corrugated tube is an elastic structure manufactured through design, and elasticity is independent of materials, so that the elastic tube can be made of materials with high strength, and the structural strength of the elastic tube is improved, for example, the corrugated tube can be made of stainless steel.

Chu Lengqi 200 further comprises a connecting seat 210, one of the blocking member 420 and the connecting seat 210 may comprise a protrusion 421, the other may be provided with a recess 211, for example, the blocking member 420 may comprise a protrusion 421, the connecting seat 210 may comprise a recess 211, and in the disassembled state, and when the refrigerating member 100 is mounted on the shell 300, the blocking member 420 and the connecting seat 210 are connected by a positioning fit of the protrusion 421 and the recess 211. This configuration facilitates accurate interfacing of the refrigeration unit 100 and the cold reservoir 200.

In a further embodiment, the protruding portion 421 may be a tapered protrusion, and the recessed portion 211 may be a tapered recess adapted to the shape of the tapered protrusion. Along the direction from the conical protrusion to the conical depression, the cross-sectional area of the conical protrusion is gradually reduced, and the cross-sectional area of the conical depression is gradually reduced, so that the structure is more convenient for the butt joint of the protrusion 421 and the depression 211, and thus the butt joint of the refrigeration piece 100 and the cold storage 200 is more convenient. The cross-sectional areas of the tapered protrusions and the tapered depressions each refer to an area of a cross-section perpendicular to the moving direction of the refrigeration member 100.

In order to achieve the accurate butt joint of the refrigeration piece 100 and the cold storage 200, the blocking piece 420 may be a heavy hammer, which is used for applying a pulling force to the pipe 400 to drive the pipe 400 to straighten in the extending direction, so as to avoid the pipe 400 from bending at a larger angle in the installation state, and the accurate butt joint of the refrigeration piece 100 and the cold storage 200 is affected.

In order to further reduce the influence of the external environment of the case 300 on the cold storage 200, the receiving space 310 may be a vacuum environment, and the vacuum degree of the vacuum environment of the receiving space 310 may be a second preset vacuum degree, which may be less than or equal to 10 ^-5 Pa. In this case, the convection heat leakage between the cold storage 200 in the accommodating space 310 and the external environment of the shell 300 can be further reduced, the cold storage time of the cold storage 200 can be prolonged, and at the same time, the air content in the accommodating space 310 can be further reduced, thereby further alleviating the problem of condensation and icing of the air in the accommodating space 310 on the cold storage 200.

Specifically, the low temperature detection apparatus may further include a second vacuum valve 700, and the second vacuum valve 700 is provided to the housing 300. The second vacuum pumping valve 700 may be connected to a second vacuum pump, and the second vacuum pump may pump air in the accommodating space 310 through the second vacuum pumping valve 700 to form a vacuum environment in the accommodating space 310. The second evacuating valve 700 may be a second vacuum valve or a second check valve. The second vacuum pump may be a molecular pump or an ion pump.

When the accommodating space 310 is pumped to a vacuum environment, the accommodating space 310 can be pumped to a second middle preset vacuum degree by the second vacuum pump, then the accommodating space 310 is subjected to leak detection by the helium mass spectrometer, after the leak rate of the accommodating space 310 is smaller than the preset leak rate, the accommodating space 310 is pumped to the second preset vacuum degree by the second vacuum pump, and the second preset vacuum degree is higher than the second middle preset vacuum degree.

In addition, in the case that the accommodating space 310 is in a vacuum environment, in the installation state, the pipe 400 is retracted, the pipe 400 is in a shortened state, and the pipe 400 and the plugging piece 420 are separated from the cold storage device 200, so that a gap exists between the plugging piece 420 and the cold storage device 200, and the vacuum environment is also formed in the gap, so that heat conduction and leakage between the cold storage device Leng Qi and the plugging piece 420 can be further reduced, and the working time of the refrigerated infrared detector 900 can be further prolonged for the cold storage device 200 after refrigeration.

In this embodiment, in the installation state, the closed lumen 410 may be a vacuum lumen, the vacuum degree of the closed lumen 410 may be a first preset vacuum degree, and the first preset vacuum degree may be less than or equal to 10 ^-3 Pa. In this case, the air in the closed lumen 410 can be further reduced, thereby further alleviating the problem of frost or ice on the inner wall of the tube 400 and the blocking member 420.

Specifically, the low temperature detection device may further include an evacuation tube 610 and a first evacuation valve, where the first evacuation valve is disposed on the evacuation tube 610, and a first orifice of the evacuation tube 610 is in communication with an external environment of the housing 300, and a second orifice of the evacuation tube 610 passes through the housing 300 and is in communication with the closed lumen 410. When the air in the closed pipe cavity 410 is pumped, the first vacuumizing valve can be connected with the first vacuum pump, the first vacuum pump can pump the air in the closed pipe cavity 410 through the first vacuumizing valve, and as the air in the closed pipe cavity 410 is reduced under the installation state, frost is prevented from being generated in the closed pipe cavity 410, the vacuum requirement on the closed pipe cavity 410 is low, the first vacuum pump can be a mechanical pump, and the pumping rate of the mechanical pump is high.

After air in the closed tube cavity 410 in the installation state is extracted, the closed tube cavity 410 can be subjected to leak detection treatment by using a helium mass spectrometer, so that the leak rate of the closed tube cavity 410 is ensured to be smaller than a preset leak rate.

Further, evacuation tube 610 may be in communication with an end of the lumen adjacent first mounting hole 340. In this case, the evacuation tube 610 is adjacent to the first mounting hole 340, so that air entering the first mounting hole 340 can be timely evacuated, and condensation and icing of the air at a position far from the first mounting hole 340 can be avoided.

In the disassembled state, and under the condition that the refrigerating piece 100 is mounted on the shell 300, the refrigerating piece 100 can seal the first pipe orifice of the pipe fitting 400, the pipe cavity can be in a vacuum environment, the vacuum degree of the vacuum environment of the pipe cavity in the disassembled state can be a third preset vacuum degree, and the third preset vacuum degree can be less than or equal to 10 ^-5 Pa. In this case, the convection heat leakage between the part of the refrigeration element 100 extending into the pipe cavity and the external environment of the shell 300 can be reduced in the process of refrigerating the cold storage 200 by the refrigeration element 100, which is helpful for improving the refrigeration efficiency of the refrigeration element 100 to the cold storage 200.

When the vacuum environment is extracted from the lumen, the third vacuum pump may be used to extract the accommodating space 310 to a third intermediate preset vacuum level, then the helium mass spectrometer may be used to perform leak detection treatment on the connection position between the shell 300 and the refrigerating unit 100, and after the leak rate is smaller than the preset leak rate, the third vacuum pump may be used to extract the lumen 410 to a third preset vacuum level, where the third preset vacuum level is higher than the third intermediate preset vacuum level. The third vacuum pump may be a molecular pump or an ion pump.

After the refrigeration of the refrigeration unit 100 to the cold storage 200 is completed, the third vacuum pump may be turned off, the air in the lumen 410 may be continuously pumped by using the first vacuum pump, then the refrigeration unit 100 is separated from the shell 300, the cover 500 is mounted on the shell 300, so that a large amount of air is prevented from entering the lumen to form frost and ice in the lumen during the separation of the refrigeration unit 100 and the mounting of the cover 500 on the shell 300.

In order to achieve the installation of the shell 300 with the cover 500 or the shell 300 with the refrigerating member 100, the outer side port of the first installation hole 340 may be provided with a first connection part 320, in an installed state, the cover 500 is detachably connected with the first connection part 320, in a detached state, the cover 500 is separated from the first connection part 320, and the first connection part 320 is used to be detachably connected with the second connection part 110 of the refrigerating member 100. In this case, the first connection part 320 may be used to connect to the cover 500 and the refrigerating unit 100, so that only the first connection part 320 is required to be provided on the case 300, which is advantageous in simplifying the structure of the low temperature detecting apparatus.

The first connecting portion 320 may further be provided with a first sealing member to improve sealability between the first connecting portion 320 and the cover body and between the first connecting portion 320 and the connection position of the refrigerating member 100, and the first sealing member may be a rubber sealing ring or a metal sealing ring.

Specifically, the first connection portion 320 may be a first flange, the second connection portion 110 may be a second flange, and in the installed state, the cover 500 may be detachably connected to the first flange through a threaded connection (e.g., a bolt), and in the detached state, the first flange may be detachably connected to the second flange through a threaded connection. The connection of the first connection part 320 and the second connection part 110 is realized through the screw connection, the connection of the cover 500 and the first connection part 320 is realized through the screw connection, the operation is simple and convenient, and the screw connection can be shared, so that the structure of the low temperature detection device is further simplified.

In the process of separating the refrigerating member 100 from the low temperature detecting device, the screw connector can be screwed off, the refrigerating member 100 can be quickly lifted up by using devices such as an electric hoist, then the cover 500 is quickly mounted on the first flange by using the screw connector, in the process, the opening of the first vacuum pump can be kept, and the air entering the pipe 400 is reduced.

After the refrigerator 200 is cooled by the cooling unit 100, in order to reduce the loss of the cooling capacity of the refrigerator 200, the cover 500 may be a heat-blocking cover plate, so that the time for which the refrigerator 200 can maintain the operation of the cooling type infrared detector 900 after the refrigerator 200 is cooled is prolonged.

In the embodiment of the present application, the cold storage 200 may include a medium container for containing a cold storage medium for storing cold or releasing cold, and the refrigerating unit 100 may cool the cold storage medium through the medium container in case that the medium container is filled with the cold storage medium, so as to store cold in the cold storage medium. In this case, the cold storage medium may be a solid medium, a liquid medium, or a gaseous medium, increasing the selectivity of the cold storage medium.

When the cold storage medium is a liquid medium, the temperature of the liquid medium gradually rises and may be gasified in the process of providing cold for the refrigeration type infrared detector 900, the pressure in the medium container is increased due to the gasification of the liquid medium, and when the cold storage medium is a gas medium, the pressure in the medium container is also increased in the process of inputting the gas medium into the medium container, and potential safety hazards are generated due to the fact that the internal pressure of the medium container is too large.

For this reason, the low temperature detection device may further include a pressure release tube 640, one end of the pressure release tube 640 may be communicated with the medium container, the other end of the pressure release tube 640 extends out of the shell 300, the pressure release tube 640 may be provided with a pressure release valve, and the pressure release valve is automatically opened to release pressure for the medium container when the pressure in the medium container is greater than the preset pressure, so as to improve the safety performance of the low temperature detection device.

The connection seat 210 is provided in the medium container, and in the disassembled state, and when the cooling element 100 is mounted on the shell 300, the cooling element 100 is connected with the medium container through the plugging element 420 and the connection seat 210 in a heat conduction manner, so that the cooling element 100 can cool the medium container, and the cooling element 100 cools the cold storage medium through the medium container.

In the case where the cold storage medium is a fluid medium (cold storage medium that is a liquid medium or a gaseous medium), the low temperature detection apparatus may further include a medium delivery pipe, one end of the medium delivery pipe is connected to the medium container, and the other end of the medium delivery pipe extends out of the shell 300, and the medium delivery pipe may be used for inputting the fluid medium into the medium container, so that a user may input the fluid medium into the medium container according to specific working requirements of the refrigeration type infrared detector 900.

Further, the length of the pressure release tube 640 may be greater than the cross-sectional area of the pressure release tube 640 (i.e., the area of the cross-section of the pressure release tube 640 perpendicular to the length direction thereof), and the length of the media delivery tube may be greater than the cross-sectional area of the media delivery tube (i.e., the area of the cross-section of the media delivery tube perpendicular to the length direction thereof), so that extending the lengths of the media delivery tube and the pressure release tube 640 can reduce the heat transfer and leakage of the fluid media through the pressure release tube 640 and the media delivery tube.

The cold storage medium may be a liquid medium, and in order to determine the volume of the liquid medium in the medium container, the liquid level of the liquid medium in the medium container may be detected, and the volume of the liquid medium may be calculated from the liquid level of the liquid medium in the medium container. Because the temperature of the liquid medium after refrigeration is lower, the detection precision of the liquid level meter in a low-temperature environment is poor, and even the risk of difficult work exists.

For this reason, in the embodiment of the present application, the low temperature detection apparatus may further include a plurality of temperature detectors, and the plurality of temperature detectors may be disposed within the medium container and distributed along the height direction of the medium container. Since the temperature detected by the temperature detector in contact with the liquid medium is different from the temperature detected by the temperature detector not in contact with the liquid medium, when the temperature values detected by the two adjacent temperature detectors are not equal to each other, the height corresponding to the temperature detector having the lower temperature detection value can be determined as the liquid level value of the liquid medium.

Alternatively, the temperature detection values of the respective temperature detectors may be manually compared to determine the liquid level of the liquid medium.

Further, in order to enable more convenient determination of the liquid level of the liquid medium in the medium container, the low-temperature detecting device may further include a liquid level determining device connected to the plurality of temperature detectors for determining, as the liquid level value of the liquid medium, a height corresponding to a temperature detector having a lower temperature detection value in a case where the temperature values detected by two adjacent temperature detectors are not equal.

Alternatively, the low temperature detecting device generally includes a central processing logic device, the liquid level determining device may be a central processing logic device, and the plurality of temperature detectors may be connected to the central processing logic device, where the central processing logic device compares the temperature values detected by the respective temperature detectors, and determines, as the liquid level value of the liquid medium, the height corresponding to the temperature detector having the lower temperature detection value when the temperature values detected by the two adjacent temperature detectors are not equal. The cryogenic detection device may further comprise a display, which may be connected to the central processing logic, for displaying the level of the liquid medium, so that the level of the liquid medium is more visually seen.

Further, a temperature detector located at the lowest level on the medium container may also be used to detect the temperature of the cold reservoir 200. When the temperature of the liquid medium is about to be unable to meet the working requirement of the refrigeration type infrared detector 900, the refrigeration piece 100 is installed on the low-temperature detection device, the refrigeration piece 100 is started to refrigerate the liquid medium, and after the temperature of the liquid medium is lower than a preset threshold value, the refrigeration piece 100 is closed, and the refrigeration piece 100 and the low-temperature detection device are separated. The temperature detection device may be a temperature sensor.

It should be noted that, the requirements of the refrigeration type infrared detectors 900 of different types or models for the working temperature are different, and when the working time required to be maintained by the refrigeration type infrared detectors 900 is different after the refrigeration of the refrigerator 200 is performed once, the temperature requirements of the refrigerator 200 are also different, so that the preset threshold value can be adjusted according to the types, models and working time of the refrigeration type infrared detectors 900.

The low temperature detection device may further comprise a controller communicatively connected to the temperature detector for detecting the temperature of the cold storage 200 and the corresponding cold producing member 100, respectively, in case the cold producing member 100 is mounted on the low temperature detection device, and for controlling the corresponding cold producing member 100 to be turned off in case the temperature is below a preset threshold value. In this case, the worker is facilitated to remove the cooling unit 100 in time after the cold storage of the cold storage device 200 is completed.

In the case where the cold storage medium is a fluid medium, the low temperature detecting apparatus may further include a medium delivery pipe, which may include an input pipe 620 and an output pipe 630, one end of the input pipe 620 is connected to the medium container, the other end of the input pipe 620 extends out of the shell 300, one end of the output pipe 630 is connected to the medium container, and the other end of the output pipe 630 extends out of the shell 300.

In this case, the input pipe 620 is used to communicate with the medium storage device, the output pipe 630 is used to communicate with the medium extraction device, and both the input of the fluid medium and the extraction of the fluid medium have dedicated pipes, so as to facilitate the connection between the cryogenic detection apparatus and the medium storage device and the medium extraction device.

The fluid medium may be liquid nitrogen, after the refrigeration of the liquid nitrogen by using the refrigeration piece 100 is completed, the liquid nitrogen may be cooled to fix nitrogen, and the cold energy is provided for the refrigeration type infrared detector 900 by utilizing the solid-liquid two-phase change and self enthalpy change heat absorption of the cold storage medium.

After the refrigerating unit 100 is installed in the low temperature detecting device, after the vacuum degree of the accommodating space 310 meets the requirement, the liquid medium can be added into the medium container by using the input pipe 620, and in the process of adding the liquid medium, the medium container can be pre-cooled first, and after the pre-cooling is finished, the liquid medium is added into the medium container to reach the preset liquid level. Under the condition, the precooling of the medium container can avoid the problem that the liquid medium cannot be introduced into the medium container due to overlarge temperature difference between the liquid medium and the medium container, so that the waste of the liquid medium is caused.

Optionally, the liquid medium may be first conveyed into the medium container to a first level, and after a preset time, the liquid medium is continuously conveyed into the medium container to a preset level, where the first level is less than the preset level. Alternatively, the liquid medium may be delivered into the medium container at a first predetermined flow rate during a first period of time, after which the liquid medium is subsequently delivered into the medium container at a second predetermined flow rate, which is greater than the first predetermined flow rate, during a second period of time up to the predetermined level.

The input pipe 620 and the output pipe 630 are respectively provided with a switch valve, when the fluid medium is required to be added into the medium container or the fluid medium in the medium container is required to be pumped out, the corresponding switch valve is opened, and after the fluid medium is added or the fluid medium is pumped out, the corresponding switch valve is closed.

Further, the pressure release tube 640, the input tube 620 and the output tube 630 may be distributed around the tube 400, and form a deformation guiding space extending along the expansion direction of the tube 400, so as to avoid the tube 400 from greatly swinging or bending at a larger angle in the installation state, and influence the accurate butt joint of the refrigeration unit 100 and the cold storage 200.

In the above-mentioned scheme, the storage Leng Qi 200 is disposed in the shell 300, and in this embodiment, the storage Leng Qi 200 may be supported on the inner wall of the shell 300 by the support structure 800, and a gap may be formed between the cold storage 200 and the inner wall of the shell 300. In this case, the contact area between the cold storage 200 and the shell 300 can be reduced, and thus the conduction heat leakage of the cold storage 200 can be reduced, and the cooling time of the cooling type infrared detector 900 can be prolonged after the cold storage 200 cools.

Further, the length of the support structure 800 may be greater than the cross-sectional area of the support structure 800 (i.e., the area of the cross-section perpendicular to the length direction of the support structure 800), so that the distance between the cold store 200 and the inner wall of the shell 300 is greater than the contact area of the support structure 800 and the inner wall of the shell 300, and extending the length of the support structure 800 can further reduce the conductive heat leakage.

The low temperature detection device may further include a heat insulating layer, which may be wrapped around the outer surface of the heat accumulator 200. In this case, radiation heat leakage from the external environment to the cold storage 200 can be reduced, and thus the cooling time of the cooled cold storage 200 to the cooled infrared detector 900 can be prolonged. Alternatively, the heat insulating layer may be one layer or may be multiple layers.

Based on the low temperature detection device of any of the above embodiments of the present application, the embodiments of the present application further disclose a low temperature detection system, where the disclosed low temperature detection system includes a refrigeration unit 100 and the low temperature detection device of any of the above embodiments. The deducing process of the beneficial effects generated by the low-temperature detection system is generally similar to that brought by the low-temperature detection device, so that the description is omitted herein.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.

Claims (10)

1. The low-temperature detection device is characterized by comprising a cold storage device (200), a shell (300), a cover body (500) and a refrigeration type infrared detector (900);

the shell (300) is provided with a first mounting hole (340), and the storage Leng Qi (200) is arranged in the shell (300); the refrigeration type infrared detector (900) is connected with the storage Leng Qi (200) in a heat conduction way; the cover body (500) has an installation state and a removal state;

in the mounted state, the cover (500) is detachably mounted to the housing (300) and seals the first mounting hole (340);

in the disassembled state, the cover (500) is separated from the shell (300), and the first mounting hole (340) is opened and is used for docking with the refrigerating element (100).

2. The cryogenic detection device according to claim 1, comprising a tube (400), the tube (400) being arranged in the housing (300), a first tube orifice of the tube (400) being in sealing abutment with the first mounting hole (340), a second tube orifice of the tube (400) being plugged with a plug (420), the plug (420) being connectable to the reservoir Leng Qi (200); the pipe fitting (400), the plugging piece (420) and the shell (300) enclose an accommodating space (310); the reservoir Leng Qi (200) is disposed within the receiving space (310);

in the mounted state, at least the cover (500), the tube (400) and the blocking piece (420) enclose a closed lumen (410), and the closed lumen (410) is isolated from the receiving space (310).

3. The cryogenic detection apparatus according to claim 2, wherein in the installed state the closure member (420) is separated from the reservoir Leng Qi (200).

4. The cryogenic detection device according to claim 2, characterized in that the accommodation space (310) is a vacuum space.

5. The cryogenic detection device according to claim 2, characterized in that in the mounted state the closed lumen (410) is a vacuum lumen.

6. The cryogenic detection device according to claim 5, further comprising an evacuation tube (610) and a first evacuation valve, the first evacuation valve being provided in the evacuation tube (610), a first orifice of the evacuation tube (610) being in communication with the external environment of the housing (300), a second orifice of the evacuation tube (610) passing through the housing (300) and being in communication with the closed lumen (410).

7. The cryogenic inspection apparatus according to claim 1, wherein the outer side port of the first mounting hole (340) is provided with a first connection portion (320),

in the mounted state, the cover body (500) is detachably connected with the first connecting portion (320);

in the disassembled state, the cover body (500) is separated from the first connecting portion (320), and the first connecting portion (320) is used for being detachably connected with the second connecting portion (110) of the refrigerating piece (100).

8. The cryogenic detection device according to claim 7, characterized in that the first connection (320) is a first flange and the second connection (110) is a second flange;

in the installation state, the cover body (500) is detachably connected with the first flange through a threaded connecting piece;

in the disassembled state, the first flange can be detachably connected with the second flange through the threaded connecting piece.

9. The cryogenic detection device according to claim 1, characterized in that the cover (500) is a heat-resistant cover plate.

10. A cryogenic detection system, characterized by comprising a refrigerating element (100) and a cryogenic detection device according to any of the preceding claims 1 to 9.

Images