Method and device for liquid nitrogen filling, liquid nitrogen filling station, storage medium

Abstract

The application relates to the technical field of liquid nitrogen filling, and discloses a method for liquid nitrogen filling, which comprises the following steps: determining a target liquid nitrogen tank; determining a target filling height of a pipe head of a liquid nitrogen input pipe from the bottom of the target liquid nitrogen tank according to current parameters of the target liquid nitrogen tank; and driving a filling platform to ascend by a set height according to the target filling height, so that the pipe head of the liquid nitrogen input pipe is inserted into the target liquid nitrogen tank. Based on the current parameters of the target liquid nitrogen tank, the height of the filling platform is increased, so that the pipe head of the liquid nitrogen input pipe is deeply inserted into the target liquid nitrogen tank, the amount of splashed liquid nitrogen in the liquid nitrogen tank during liquid nitrogen filling is reduced, a large amount of liquid nitrogen is prevented from volatilizing, the temperature drop in the tank body is slowed down, the safety of the equipment is maintained, and the durability of the liquid nitrogen filling station is improved. The application further discloses a device for liquid nitrogen filling, a liquid nitrogen filling station and a storage medium.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid nitrogen filling, for example to a method and device for liquid nitrogen filling, a liquid nitrogen filling station and a storage medium. BACKGROUND

[0002] At present, biological samples are transferred by transfer barrels filled with liquid nitrogen to maintain a low-temperature environment and ensure the activity of biological samples. Since the liquid nitrogen in the transfer barrel will gradually be consumed over time, it is necessary to supplement liquid nitrogen into the transfer barrel. In the prior art, the operation of supplementing liquid nitrogen is usually performed manually. Manual liquid nitrogen filling causes a large amount of heat absorption due to the gasification of splashed liquid nitrogen, resulting in the condensation of water vapor in the air into smoke that spreads. In addition, splashed liquid nitrogen is prone to cause frostbite.

[0003] The related technology discloses a kind of deep hypothermia transfer barrel liquid nitrogen filling station, comprising: the box with opening in front, fan fixed in the rear of box, tray is slidably arranged in box, door is covered in the opening of box, and liquid nitrogen input pipe is extended into the top of box;Box rear wall is provided with smoke outlet communicated with fan outlet, sensor one and sensor two are respectively fixed in box, and sensor one and sensor two are inducted transfer barrel and transfer barrel cover, box or tray is fixed with weighing sensor for obtaining the weight of transfer barrel, door or box is fixed with sensor three for sensing whether door is closed box opening or not.In the process of liquid nitrogen filling, the transfer barrel is placed in the tray, and the tray is pushed into the box, the door is closed, to avoid the problem of liquid nitrogen splashing and causing frostbite of personnel;Then control starts fan, and nitrogen in the box is blown to the smoke outlet communicated with fan outlet opened in the rear wall of box, so that nitrogen accumulation is avoided.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

[0005] Using the related technology can direct the smoke in the box out through the fan to avoid the spread of smoke, although it can prevent nitrogen accumulation, but during the liquid nitrogen filling process, liquid nitrogen will still splash out of the liquid nitrogen barrel, causing the temperature in the liquid nitrogen filling station to drop sharply, which may cause equipment damage and low durability.

[0006] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0007] In order to have a basic understanding of some aspects of the disclosed embodiments, the following is a simple summary. The summary is not a general review, nor is it intended to determine key / important components or delineate the scope of protection of these embodiments, but as a prelude to the detailed description below.

[0008] The method and device for liquid nitrogen filling, the liquid nitrogen filling station and the storage medium provided by the embodiments of the present disclosure can reduce the amount of splashed liquid nitrogen in the liquid nitrogen tank during liquid nitrogen filling in the related art, avoid a large amount of liquid nitrogen evaporation, thereby slowing down the temperature drop in the tank, maintaining the safety of the equipment, and improving the durability of the liquid nitrogen filling station.

[0009] In some embodiments, the liquid nitrogen filling station comprises a height-adjustable filling platform for placing the liquid nitrogen tank; and the method comprises: determining a target liquid nitrogen tank; determining a target filling height of a pipe head of a liquid nitrogen input pipe from a bottom of the target liquid nitrogen tank according to a current parameter of the target liquid nitrogen tank; and driving the filling platform to rise by a set height according to the target filling height.

[0010] In some embodiments, the device comprises a processor and a memory storing program instructions, and the processor is configured to execute the method for liquid nitrogen filling when executing the program instructions.

[0011] In some embodiments, the liquid nitrogen filling station comprises:

[0012] a liquid nitrogen filling station body, the liquid nitrogen filling station comprising a height-adjustable filling platform for placing the liquid nitrogen tank; and

[0013] The device for liquid nitrogen filling is installed in the liquid nitrogen filling station body.

[0014] In some embodiments, the storage medium stores program instructions, and the program instructions execute the method for liquid nitrogen filling when running.

[0015] The method and device for liquid nitrogen filling, the liquid nitrogen filling station and the storage medium provided by the embodiments of the present disclosure can achieve the following technical effects:

[0016] The target liquid nitrogen tank is determined, and a target filling height of a pipe head of a liquid nitrogen input pipe from a bottom of the target liquid nitrogen tank is determined according to a current parameter of the target liquid nitrogen tank, and finally the filling platform is driven to rise by a set height according to the target filling height. Based on the current parameter of the target liquid nitrogen tank, the height of the filling platform is raised, so that the pipe head of the liquid nitrogen input pipe is deep into the target liquid nitrogen tank, the amount of splashed liquid nitrogen in the liquid nitrogen tank during liquid nitrogen filling is reduced, a large amount of liquid nitrogen evaporation is avoided, thereby slowing down the temperature drop in the tank, maintaining the safety of the equipment, and improving the durability of the liquid nitrogen filling station.

[0017] The general description above and the following description below are exemplary and explanatory only and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] One or more embodiments are illustrated by way of example in the figures that are not intended to be limiting of the embodiments. Like numbers refer to like elements throughout the drawings, which are not necessarily to scale, and in which:

[0019] Figure 1 is a schematic diagram of one method for liquid nitrogen filling provided by embodiments of the present disclosure;

[0020] Figure 2 is a schematic diagram of another method for liquid nitrogen filling provided by embodiments of the present disclosure;

[0021] Figure 3 is a schematic diagram of another method for liquid nitrogen filling provided by embodiments of the present disclosure;

[0022] Figure 4 is a schematic diagram of another method for liquid nitrogen filling provided by embodiments of the present disclosure;

[0023] Figure 5 is a schematic diagram of one device for liquid nitrogen filling provided by embodiments of the present disclosure;

[0024] Figure 6 is a schematic diagram of one liquid nitrogen filling station provided by embodiments of the present disclosure. DETAILED DESCRIPTION

[0025] In order to enable every detailed understanding of the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the drawings for reference only, and not to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, through multiple details, a sufficient understanding of the disclosed embodiments is provided. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be simplified to show.

[0026] The terms "first", "second", and the like in the description and claims of the present disclosure and the above drawings are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0027] Unless otherwise specified, the term "a plurality of" means two or more.

[0028] In the embodiments of the present disclosure, the character " / " represents an "or" relationship between the objects before and after it. For example, A / B means A or B.

[0029] The term "and / or" is a descriptive term that refers to an association relationship, which means that there can be three relationships. For example, A and / or B means that there are three relationships of A or B, or A and B.

[0030] The term "corresponds to" can refer to an association relationship or a binding relationship. A corresponds to B means that there is an association relationship or a binding relationship between A and B.

[0031] At present, a transfer bucket is used to transfer a biological sample, and the transfer bucket is filled with liquid nitrogen to maintain a low-temperature environment and ensure the activity of the biological sample. Since the liquid nitrogen in the transfer bucket will gradually be consumed over time, it is necessary to supplement the liquid nitrogen into the transfer bucket. In the prior art, the operation of supplementing the liquid nitrogen is usually performed manually. Manual filling of liquid nitrogen causes a large amount of heat absorption due to the gasification of splashed liquid nitrogen, resulting in the condensation of water vapor in the air into smoke that spreads. In addition, splashed liquid nitrogen is prone to cause frostbite. Related technology discloses a deep low-temperature transfer bucket liquid nitrogen filling station, which comprises a box body having an opening in the front, a fan fixed to the rear of the box body, a tray slidingly arranged in the box body, a door covering the opening of the box body, and a liquid nitrogen input pipe extending into the top of the box body. The rear wall of the box body is provided with a smoke outlet communicated with the outlet of the fan. The box body is respectively provided with a sensor one and a sensor two for sensing the transfer bucket and the cover of the transfer bucket. The box body or the tray is provided with a weighing sensor for obtaining the weight of the transfer bucket. The door or the box body is provided with a sensor three for sensing whether the door closes the opening of the box body. When filling liquid nitrogen, the transfer bucket is placed in the tray, and the tray is pushed into the box body, and the door is closed to avoid the problem of frostbite caused by splashing of liquid nitrogen. Then, the fan is controlled to blow the nitrogen in the box body to the smoke outlet formed in the rear wall of the box body and communicated with the outlet of the fan, thereby avoiding the accumulation of nitrogen. The related technology can direct the smoke in the box body to be discharged by the fan to avoid the spread of smoke. Although the accumulation of nitrogen can be prevented, liquid nitrogen will still splash out of the liquid nitrogen bucket during the liquid nitrogen filling process, resulting in a sharp drop in the temperature in the liquid nitrogen filling station, which may cause damage to the equipment and reduce the durability.

[0032] The embodiment of the present disclosure improves the height of the filling platform based on the current parameters of the target liquid nitrogen bucket, so that the pipe head of the liquid nitrogen input pipe penetrates into the target liquid nitrogen bucket, reduces the amount of splashed liquid nitrogen in the liquid nitrogen bucket during liquid nitrogen filling, avoids the large-scale evaporation of liquid nitrogen, and slows down the temperature drop in the box body.

[0033] The embodiment of the present disclosure discloses a liquid nitrogen filling station, comprising a master control board, a door lock, a height-adjustable filling platform for placing a liquid nitrogen barrel, a liquid nitrogen input pipe for inputting liquid nitrogen into the liquid nitrogen barrel, and a fan arranged opposite to the filling platform. The filling platform comprises a base for placing the liquid nitrogen barrel and a stepping motor for driving the filling platform to move. One or more weighing sensors are arranged on the base. The plurality of weighing sensors are symmetrically placed on the base. The weighing sensors are in communication connection with the master control board. Specifically, the weighing sensors can communicate with the master control board through an RS485 interface. The master control board reads the weighing value at a set interval. Specifically, the master control board can read the weighing value every 500 ms. The liquid nitrogen input pipe comprises a solenoid valve for controlling the on-off of the liquid nitrogen input pipe. The fan is used to blow nitrogen gas to the smoke outlet of the liquid nitrogen filling station. When filling liquid nitrogen, the door lock is closed to avoid the accumulation of nitrogen gas outside the liquid nitrogen filling station and the freezing injury of splashed liquid nitrogen to personnel.

[0034] In combination Figure 1 The embodiment of the present disclosure provides a method for liquid nitrogen filling, comprising the following steps:

[0035] S01, the liquid nitrogen filling station determines a target liquid nitrogen barrel.

[0036] S02, the liquid nitrogen filling station determines a target filling height of a pipe head of a liquid nitrogen input pipe from the bottom of the target liquid nitrogen barrel according to the current parameters of the target liquid nitrogen barrel.

[0037] S03, the liquid nitrogen filling station drives the filling platform to rise by a set height according to the target filling height, so that the pipe head of the liquid nitrogen input pipe extends into the target liquid nitrogen barrel.

[0038] Wherein, the user or the automatic device places the liquid nitrogen barrel to be filled on the filling platform, opens the barrel cover of the liquid nitrogen barrel, and closes the door lock, and then the liquid nitrogen filling platform detects whether the state of the liquid nitrogen filling platform meets the liquid nitrogen filling condition. If the state of the liquid nitrogen filling platform meets the liquid nitrogen filling condition, the liquid nitrogen filling station determines the target liquid nitrogen barrel. The liquid nitrogen filling condition comprises any one or more parameters affecting the liquid nitrogen filling process or safety, such as the barrel cover of the liquid nitrogen barrel placed on the filling platform being opened, and / or the door lock of the liquid nitrogen filling station being closed, and / or the weighing sensor communication self-check being normal, and / or the touch display screen communication self-check being normal, etc.

[0039] Specifically, the liquid nitrogen filling station can determine the target liquid nitrogen tank according to the selection of the user, or determine a default liquid nitrogen tank as the target liquid nitrogen tank. For example, the liquid nitrogen filling station displays the self-weight, height and maximum filling liquid nitrogen weight of a plurality of liquid nitrogen tanks on the touch display screen, so that the user can select and confirm the liquid nitrogen tank. If the liquid nitrogen tank option on the touch display screen does not match the current parameters of the liquid nitrogen tank placed on the filling platform, and does not meet the user's demand, the user can also modify the above parameters according to the demand. After the user confirms, the liquid nitrogen filling station determines the liquid nitrogen tank selected by the user as the target liquid nitrogen tank. In the case where the user does not select, the liquid nitrogen filling station determines the default liquid nitrogen tank as the target liquid nitrogen tank.

[0040] The method for liquid nitrogen filling provided by the embodiment of the present disclosure determines the target liquid nitrogen tank, and determines the target filling height of the pipe head of the liquid nitrogen input pipe from the bottom of the target liquid nitrogen tank according to the current parameters of the target liquid nitrogen tank, and finally drives the filling platform to rise by a set height according to the target filling height. Based on the current parameters of the target liquid nitrogen tank, the height of the filling platform is raised, so that the pipe head of the liquid nitrogen input pipe is deep into the target liquid nitrogen tank, which reduces the amount of liquid nitrogen splashed in the liquid nitrogen tank during liquid nitrogen filling, avoids the large evaporation of liquid nitrogen, thereby slowing down the temperature drop in the tank, maintaining the safety of the equipment, and improving the durability of the liquid nitrogen filling station.

[0041] Optionally, the liquid nitrogen filling station determines the target filling height of the pipe head of the liquid nitrogen input pipe from the bottom of the target liquid nitrogen tank according to the current parameters of the target liquid nitrogen tank, including: the liquid nitrogen filling station determines the splashing height corresponding to the current parameters of the target liquid nitrogen tank according to a preset first relationship; the liquid nitrogen filling station determines the first difference between the height of the target liquid nitrogen tank and the splashing height as the target filling height; wherein the current parameters include the height of the target liquid nitrogen tank and / or the size of the mouth of the target liquid nitrogen tank and / or the set filling weight.

[0042] In this way, since the height of the target liquid nitrogen tank and / or the size of the mouth of the target liquid nitrogen tank and / or the set filling weight all have an impact on the height of the liquid nitrogen splashing, for example, generally, the larger the mouth of the target liquid nitrogen tank, the less liquid nitrogen splashes during filling; the higher the target liquid nitrogen tank, the less liquid nitrogen splashes during filling; the more the set filling weight, the more liquid droplets splashes during filling, etc. Therefore, the liquid nitrogen filling station determines the splashing height corresponding to the current parameters of the target liquid nitrogen tank according to the preset first relationship, which can make the splashing height of the liquid nitrogen match the height of the target liquid nitrogen tank and / or the size of the mouth of the target liquid nitrogen tank and / or the set filling weight, so that the target filling height is more accurate.

[0043] Optionally, the liquid nitrogen filling station drives the filling platform to rise by a set height according to the target filling height, including: the liquid nitrogen filling station obtains a height distance between the pipe head of the liquid nitrogen input pipe and the initial position of the filling platform; the liquid nitrogen filling station determines a second difference between the height distance and the target filling height as the set height; and the liquid nitrogen filling station drives the filling platform to rise by the set height.

[0044] In the method, after the liquid nitrogen filling station drives the filling platform to rise by the set height, the height of the filling platform can be corrected according to a set filling weight, so as to avoid the pipe head being lower than the final liquid level height after the liquid nitrogen barrel is filled with the set filling weight. For example, the liquid nitrogen filling station determines the final liquid level height according to the set filling weight; and in the case that the pipe head is lower than the final liquid level height, the filling platform is driven to be lowered until the pipe head is higher than the final liquid level height by a set threshold.

[0045] In this way, the liquid nitrogen filling station obtains the height distance between the pipe head of the liquid nitrogen input pipe and the initial position of the filling platform, and determines the second difference between the height distance and the target filling height as the set height, and finally drives the filling platform to rise by the set height, so that the filling platform is raised to drive the liquid nitrogen barrel to rise to a position where the pipe head just penetrates into the target liquid nitrogen barrel by the splash height, thereby reducing the amount of liquid nitrogen splashing out of the liquid nitrogen barrel during filling.

[0046] In combination with Figure 2 As shown in the method for liquid nitrogen filling provided by the embodiment of the present disclosure, the method comprises the following steps.

[0047] S01, the liquid nitrogen filling station determines a target liquid nitrogen barrel.

[0048] S02, the liquid nitrogen filling station determines a target filling height of a pipe head of a liquid nitrogen input pipe from the bottom of the target liquid nitrogen barrel according to the current parameters of the target liquid nitrogen barrel.

[0049] S03, the liquid nitrogen filling station drives the filling platform to rise by a set height according to the target filling height, so that the pipe head of the liquid nitrogen input pipe penetrates into the target liquid nitrogen barrel.

[0050] S21, the liquid nitrogen filling station starts a fan arranged corresponding to the filling platform.

[0051] S22, the liquid nitrogen filling station opens an electromagnetic valve of the liquid nitrogen input pipe.

[0052] In the method for liquid nitrogen filling provided by the embodiment of the present disclosure, since the liquid nitrogen barrel is in a suitable filling position, the liquid nitrogen filling station starts a fan arranged corresponding to the filling platform to blow nitrogen gas to the smoke outlet, so as to avoid the nitrogen gas from gathering in advance. In addition, the electromagnetic valve of the liquid nitrogen input pipe is opened to fill liquid nitrogen into the target liquid nitrogen barrel.

[0053] Optionally, the liquid nitrogen filling station opens the electromagnetic valves of the liquid nitrogen input pipes, comprising: the liquid nitrogen filling station obtains the distances between each electromagnetic valve and the liquid nitrogen filling station; and the liquid nitrogen filling station opens each electromagnetic valve in turn according to the order from large to small.

[0054] In this way, the liquid nitrogen filling station obtains the distances between each electromagnetic valve and the liquid nitrogen filling station, and opens each electromagnetic valve in turn according to the order from large to small. This avoids the situation that the liquid nitrogen jet does not stop after a single electromagnetic valve breaks down, and improves the safety of the liquid nitrogen filling station.

[0055] Optionally, after the liquid nitrogen filling station opens the electromagnetic valves of the liquid nitrogen input pipes, the liquid nitrogen filling station further comprises: detecting the speed of the liquid nitrogen filling; and stopping the filling and / or reminding the user if the speed of the liquid nitrogen filling is outside the set range.

[0056] The liquid nitrogen filling station determines the set range, comprising: after the liquid nitrogen filling station determines the target filling weight according to the set filling weight and the residual weight of the liquid nitrogen, the liquid nitrogen filling station determines the filling speed range corresponding to the target filling weight according to a preset second relationship; and the liquid nitrogen filling station determines the filling speed range as the set range of the speed of the liquid nitrogen filling. The target filling weight is determined according to the set filling weight and the residual weight of the liquid nitrogen. Since the target filling weight takes into account the residual weight of the liquid nitrogen, the target filling weight represents the actual filling weight during the liquid nitrogen filling process, so that the set range of the filling speed can be adapted to the actual filling weight, thereby avoiding the situation that the filling speed is too fast or too slow.

[0057] In this way, the liquid nitrogen filling station detects the speed of the liquid nitrogen filling, and stops the filling and / or reminds the user if the speed of the liquid nitrogen filling is outside the set range. At this time, the liquid nitrogen filling speed may be too fast, which can cause more liquid nitrogen to splash out of the bucket, resulting in damage to the equipment. The liquid nitrogen filling speed may also be too slow, which can cause the filling to be completed in time, affecting the filling efficiency. Therefore, the filling is stopped and / or the user is reminded to pay attention to the liquid nitrogen filling speed and adjust the liquid nitrogen filling speed to be within the set range.

[0058] In combination with Figure 3 As shown in FIG. 1, the present disclosure provides a method for liquid nitrogen filling, comprising:

[0059] S01, the liquid nitrogen filling station determines a target liquid nitrogen bucket.

[0060] S02, the liquid nitrogen filling station determines a target filling height at which the pipe head of the liquid nitrogen input pipe is away from the bottom of the target liquid nitrogen bucket according to the current parameters of the target liquid nitrogen bucket.

[0061] S03, the liquid nitrogen filling station drives the filling platform to rise by a set height according to the target filling height, so that the pipe head of the liquid nitrogen input pipe is inserted into the target liquid nitrogen bucket.

[0062] S21, the liquid nitrogen filling station starts a fan corresponding to the filling platform.

[0063] S22, the liquid nitrogen filling station opens the electromagnetic valve of the liquid nitrogen input pipe.

[0064] S31, the liquid nitrogen filling station determines the current weight of the liquid nitrogen in the target liquid nitrogen barrel.

[0065] S32, the liquid nitrogen filling station displays the filling progress according to the current weight of the liquid nitrogen in the target liquid nitrogen barrel.

[0066] Among them, the liquid nitrogen filling station determines the current ratio of the current weight of the liquid nitrogen to the set filling weight as the filling progress, and controls the display screen to display the filling progress.

[0067] The method for liquid nitrogen filling provided by the embodiment of the present disclosure is adopted, the liquid nitrogen filling station determines the current weight of the liquid nitrogen in the target liquid nitrogen barrel, and displays the filling progress according to the current weight of the liquid nitrogen in the target liquid nitrogen barrel, so that the user can more intuitively feel the progress of the liquid nitrogen filling, and the user experience is improved.

[0068] Optionally, the liquid nitrogen filling station determines the current weight of the liquid nitrogen in the target liquid nitrogen barrel, including: the liquid nitrogen filling station determines the current weight of the liquid nitrogen according to the weight detection value of the target liquid nitrogen barrel, the liquid level height of the target liquid nitrogen barrel and the self-weight of the target liquid nitrogen barrel.

[0069] In this way, the liquid nitrogen filling station determines the current weight of the liquid nitrogen according to the weight detection value of the target liquid nitrogen barrel, the liquid level height of the target liquid nitrogen barrel and the self-weight of the target liquid nitrogen barrel, which can make the filling progress display more accurate and improve the user experience.

[0070] Optionally, the liquid nitrogen filling station determines the current weight of the liquid nitrogen according to the weight detection value of the target liquid nitrogen barrel, the liquid level height of the target liquid nitrogen barrel and the self-weight of the target liquid nitrogen barrel, including: the liquid nitrogen filling station calculates C=(C1+C2) / 2 to obtain the current weight of the liquid nitrogen; wherein C1 is the difference between the weight detection value of the target liquid nitrogen barrel and the self-weight of the target liquid nitrogen barrel, and C2 is the weight of the liquid nitrogen determined according to the liquid level height of the target liquid nitrogen barrel.

[0071] Among them, the liquid nitrogen filling station determines the weight of the liquid nitrogen according to the liquid level height of the target liquid nitrogen barrel, including: the liquid nitrogen filling station calculates C2=H2 / H1xC; wherein C2 is the weight of the liquid nitrogen, H2 is the current liquid level height of the target liquid nitrogen barrel, H1 is the liquid level height when the target liquid nitrogen barrel reaches the maximum filling liquid nitrogen weight, and C is the maximum filling liquid nitrogen weight.

[0072] In this way, the difference between the weight detection value of the target liquid nitrogen tank and the self weight of the target liquid nitrogen tank can represent the weight of the liquid nitrogen in the target liquid nitrogen tank, and the weight of the liquid nitrogen can also be determined through the liquid level height of the target liquid nitrogen tank. Therefore, the average value of the weight of the liquid nitrogen obtained through the above two ways is determined as the current weight of the liquid nitrogen, which can make the current weight more accurate and avoid the limitation that a single detection method is prone to error. For example, when the weight difference of the liquid nitrogen determined through the above two ways is too large, it can be determined that one of the detection methods is wrong, the filling is stopped, and / or the user is reminded of the detection failure.

[0073] In combination Figure 4 As shown in the drawings, the embodiment of the present disclosure provides a method for liquid nitrogen filling, comprising:

[0074] S01, the liquid nitrogen filling station determines the target liquid nitrogen tank.

[0075] S02, the liquid nitrogen filling station determines the target filling height of the pipe head of the liquid nitrogen input pipe from the bottom of the target liquid nitrogen tank according to the current parameters of the target liquid nitrogen tank.

[0076] S03, the liquid nitrogen filling station drives the filling platform to rise by a set height according to the target filling height, so that the pipe head of the liquid nitrogen input pipe extends into the target liquid nitrogen tank.

[0077] S21, the liquid nitrogen filling station starts the fan arranged corresponding to the filling platform.

[0078] S22, the liquid nitrogen filling station opens the electromagnetic valve of the liquid nitrogen input pipe.

[0079] S41, the liquid nitrogen filling station closes the electromagnetic valve of the liquid nitrogen input pipe in the case that the current weight of the liquid nitrogen in the target liquid nitrogen tank reaches the set filling weight or the maximum filling liquid nitrogen weight of the target liquid nitrogen tank.

[0080] S42, the liquid nitrogen filling station drives the platform to fall back to the initial position and closes the fan.

[0081] By adopting the method for liquid nitrogen filling provided by the embodiment of the present disclosure, the liquid nitrogen filling station closes the electromagnetic valve of the liquid nitrogen input pipe in the case that the current weight of the liquid nitrogen in the target liquid nitrogen tank reaches the set filling weight or the maximum filling liquid nitrogen weight. By setting the maximum filling liquid nitrogen weight and the set filling weight as the closing conditions, the demand of the user for filling liquid nitrogen can be met, and the situation that the liquid nitrogen filling exceeds the maximum filling liquid nitrogen weight and causes the liquid nitrogen in the liquid nitrogen tank to overflow can be avoided. The liquid nitrogen filling station drives the platform to fall back to the initial position and closes the fan, at this time, the liquid nitrogen filling is completed.

[0082] Optionally, the method for liquid nitrogen filling further comprises: determining, by the liquid nitrogen filling station, a weight difference between the initial weight and the self-weight of the target liquid nitrogen tank as a residual liquid nitrogen weight; determining, by the liquid nitrogen filling station, a target filling weight according to the set filling weight and the residual liquid nitrogen weight; and controlling, by the liquid nitrogen filling station, to display the target filling weight.

[0083] In this way, since the set filling weight is a fixed value, if there is residual liquid nitrogen in the liquid nitrogen tank, the actual filling weight of the liquid nitrogen tank may be affected, so that the actual filling weight is inconsistent with the set filling weight. Therefore, the liquid nitrogen filling station determines a weight difference between the initial weight and the self-weight of the target liquid nitrogen tank as a residual liquid nitrogen weight, and determines a target filling weight according to the set filling weight and the residual liquid nitrogen weight, and finally controls to display the target filling weight. The target filling weight is the actual filling weight of the liquid nitrogen required in the liquid nitrogen filling process, and by controlling to display the actual filling weight, the user can more intuitively feel the intelligence of the liquid nitrogen filling station.

[0084] Optionally, the liquid nitrogen filling station determines the target filling weight according to the set filling weight and the residual liquid nitrogen weight, which comprises: in a case where the residual liquid nitrogen weight is positive and greater than or equal to a first threshold value, the liquid nitrogen filling station determines a difference between the set filling weight and the residual liquid nitrogen weight as the target filling weight; in a case where the residual liquid nitrogen weight is negative and less than or equal to a second threshold value, the liquid nitrogen filling station prompts the user to reselect the target liquid nitrogen tank; and in a case where the residual liquid nitrogen weight is greater than the second threshold value and less than the first threshold value, the liquid nitrogen filling station determines the set filling weight as the target filling weight.

[0085] In this way, in a case where the residual liquid nitrogen weight is positive and greater than or equal to the first threshold value, it indicates that a certain amount of liquid nitrogen is left in the target liquid nitrogen tank, so the liquid nitrogen filling station determines a difference between the set filling weight and the residual liquid nitrogen weight as the target filling weight. In a case where the residual liquid nitrogen weight is negative and less than or equal to the second threshold value, it indicates that the target liquid nitrogen tank cannot accommodate the liquid nitrogen of the set filling weight, i.e., the liquid nitrogen tank currently placed in the liquid nitrogen filling station does not match the parameters determined by the user, so the liquid nitrogen filling station prompts the user to reselect the target liquid nitrogen tank. In a case where the residual liquid nitrogen weight is greater than the second threshold value and less than the first threshold value, it indicates that the set filling weight matches the state of the target liquid nitrogen tank, so the liquid nitrogen filling station determines the set filling weight as the target filling weight.

[0086] In combination with Figure 5As shown, the embodiment of the present disclosure provides a device 300 for liquid nitrogen filling, comprising a processor 301 and a memory 101. Optionally, the device can also comprise a communication interface 102 and a bus 103. Wherein the processor 301, the communication interface 102, and the memory 101 can complete the communication among each other through the bus 103. The communication interface 102 can be used for information transmission. The processor 301 can invoke the logical instructions in the memory 101 to execute the method for liquid nitrogen filling of the above-mentioned embodiment.

[0087] In addition, the logical instructions in the memory 101 described above can be realized in the form of a software functional unit and sold or used as an independent product, which can be stored in a computer readable storage medium.

[0088] The memory 101 as a computer readable storage medium can be used to store software programs, computer executable programs, such as program instructions / modules corresponding to the method in the embodiment of the present disclosure. The processor 301 executes the program instructions / modules stored in the memory 101, thereby performing functional applications and data processing, i.e. realizing the method for liquid nitrogen filling in the above-mentioned embodiment.

[0089] The memory 101 can include a program storage area and a data storage area, wherein the program storage area can store an operating system and application programs required by at least one function; the data storage area can store data created according to the use of the terminal device, etc. In addition, the memory 101 can include a high-speed random access memory, and can also include a non-volatile memory.

[0090] In combination Figure 6 As shown, the embodiment of the present disclosure provides a liquid nitrogen filling station 100, comprising a liquid nitrogen filling station body and the above-mentioned device 200 (300) for liquid nitrogen filling. The device 200 (300) for liquid nitrogen filling is installed on the liquid nitrogen filling station body. The installation relationship described herein is not limited to being placed in the liquid nitrogen filling station, but also includes installation connection with other components of the liquid nitrogen filling station, including but not limited to physical connection, electrical connection or signal transmission connection, etc. Those skilled in the art can understand that the device 200 (300) for liquid nitrogen filling can be adapted to a feasible liquid nitrogen filling station body, thereby realizing other feasible embodiments.

[0091] The embodiment of the present disclosure provides a storage medium, which stores computer executable instructions, and the computer executable instructions are set to execute the above-mentioned method for liquid nitrogen filling.

[0092] The above-mentioned storage medium can be a transitory storage medium or a non-transitory storage medium.

[0093] The technical solutions of the embodiments of the present disclosure can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method disclosed in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes, or can be a transitory storage medium.

[0094] The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments can include structural, logical, electrical, process, and other changes. The embodiments represent only a few of the possible variations. Individual components and functions are optional unless explicitly required, and the order of operations can be changed. Parts and features of some embodiments can be included in or replace parts and features of other embodiments. Also, the words used in this application are used only to describe the embodiments and not to limit the claims. As used in the description of the embodiments and the claims, unless the context clearly requires otherwise, the singular forms "a," "an," and "the" are intended to include the plural forms as well. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listed items. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprises" and the like mean the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, or device including the stated element. In this document, each embodiment focuses on the differences from other embodiments, and the same or similar parts between various embodiments can be referred to each other. For the method, product, etc. disclosed in the embodiments, if it corresponds to the method part disclosed in the embodiments, the relevant part can be referred to the description of the method part.

[0095] Those skilled in the art can understand that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods for each specific application to realize the described functions, but such implementation should not be considered beyond the scope of the embodiments of the present disclosure. The skilled person can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

[0096] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the above-described device embodiments are only schematic, for example, the division of the units can only be a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, device or unit, and can be electrical, mechanical or other forms. The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to implement the embodiments. In addition, each functional unit in the embodiments of the present disclosure can be integrated in one processing unit, or each unit can be a physically independent unit, or two or more units can be integrated in one unit.

[0097] The computer program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other processing device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other processing device to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide processes for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks.

Claims

1. A method for liquid nitrogen refueling, characterized in that, Applied to a liquid nitrogen refueling station, the liquid nitrogen refueling station includes a height-adjustable refueling platform for placing liquid nitrogen tanks; the method includes: Identify the target liquid nitrogen tank; Based on the current parameters of the target liquid nitrogen tank, determine the target filling height of the liquid nitrogen inlet pipe from the bottom of the target liquid nitrogen tank, including: determining the splash height corresponding to the current parameters of the target liquid nitrogen tank according to a preset first relationship; determining the first difference between the height of the target liquid nitrogen tank and the splash height as the target filling height; wherein, the current parameters include the height of the target liquid nitrogen tank and / or the size of the target liquid nitrogen tank opening and / or the set filling weight. Based on the target filling height, the filling platform is driven to rise to the set height, so that the tip of the liquid nitrogen input pipe extends into the target liquid nitrogen tank.

2. The method according to claim 1, characterized in that, The step of driving the filling platform to rise to a set height according to the target filling height includes: Obtain the height distance between the head of the liquid nitrogen input pipe and the initial position of the filling platform; The second difference between the height distance and the target refueling height is determined as the set height; The refueling platform is raised to the set height.

3. The method according to claim 1 or 2, characterized in that, After the drive and filling platform rises to a set height, it also includes: Start the fan configured corresponding to the refueling platform; Open the solenoid valve on the liquid nitrogen input pipe.

4. The method according to claim 3, characterized in that, The solenoid valve for opening the liquid nitrogen input pipe includes: Obtain the distance between each solenoid valve and the liquid nitrogen filling station; Open each solenoid valve in sequence, from largest to smallest distance.

5. The method according to claim 3, characterized in that, After the solenoid valve that opens the liquid nitrogen input pipe is used, the system also includes: Detect the rate of liquid nitrogen refueling; If the liquid nitrogen refueling rate is outside the set range, stop refueling and / or alert the user.

6. The method according to claim 3, characterized in that, After the solenoid valve that opens the liquid nitrogen input pipe is used, the system also includes: Determine the current weight of liquid nitrogen in the target liquid nitrogen container; The filling progress is displayed based on the current weight of liquid nitrogen in the target liquid nitrogen tank.

7. An apparatus for liquid nitrogen refueling, comprising a processor and a memory storing program instructions, characterized in that, The processor is configured to perform the method for liquid nitrogen refueling as described in any one of claims 1 to 6 when executing the program instructions.

8. A liquid nitrogen refueling station, characterized in that, include: The liquid nitrogen filling station body includes a height-adjustable filling platform for placing liquid nitrogen tanks; as well as, The device for liquid nitrogen refueling as described in claim 7 is installed on the main body of the liquid nitrogen refueling station.

9. A storage medium storing program instructions, characterized in that, When the program instructions are executed, they perform the method for liquid nitrogen refueling as described in any one of claims 1 to 6.

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