A nitrogen cabinet, an intelligent nitrogen cabinet and a management method of the intelligent nitrogen cabinet

Abstract

This invention relates to a nitrogen cabinet, an intelligent nitrogen cabinet, and a management method for the intelligent nitrogen cabinet, relating to the field of dehumidification technology. The invention includes: a nitrogen cabinet with a hollow cavity running from top to bottom, and a nitrogen inlet at the top of the hollow cavity; several longitudinally arranged storage spaces on both sides of the hollow cavity, separated from the hollow cavity by a first perforated plate; the longitudinally arranged storage spaces are separated by a sealing plate; the hollow cavity is closed near the cabinet door and back panel, resulting in the storage spaces on both sides of the hollow cavity being connected to the central cavity through the first perforated plate, while there is no direct connection between the longitudinally arranged storage spaces; the flow rate of the gas between the storage spaces and the hollow cavity is adjusted by adjusting the arrangement of the through holes in the second perforated plate; this invention solves the manufacturing cost problem of the nitrogen cabinet by setting the central cavity as a buffer module, while also achieving high humidity control requirements.

Description

Technical Field

[0001] This invention relates to storage technology for electronic components, and more particularly to a nitrogen cabinet, an intelligent nitrogen cabinet, and a management method for the intelligent nitrogen cabinet. Background Technology

[0002] Most publicly available high-precision nitrogen cabinets currently use independent sample storage with multiple nitrogen chambers. Each nitrogen chamber is equipped with a sensor and a nitrogen circulation device. Although these nitrogen cabinets can accurately control the ambient temperature of each nitrogen chamber, the manufacturing process is complex. For example, the nitrogen pipeline layout is complex and prone to failure. The excessive independent space of the nitrogen cabinet requires the creation of independent sealed spaces or drawer structures, which consumes a lot of materials and is time-consuming to build, resulting in high manufacturing costs.

[0003] Currently, the control and management of nitrogen cabinets are not automated enough, and all are manually switched on and off. Furthermore, the management of the products inside the nitrogen cabinets is not intelligent enough, and manual operation often results in errors. In addition, there is a lack of management technology for operators. Summary of the Invention

[0004] To address the shortcomings of at least one of the prior art described above, this invention provides a nitrogen holder.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] A nitrogen holder includes the following structure:

[0007] The nitrogen tank shell includes a top plate, a bottom plate, a back plate, and side plates;

[0008] The nitrogen cabinet has a hollow cavity running from top to bottom, and a nitrogen inlet is provided at the top or bottom of the hollow cavity. The nitrogen inlet is connected to a solenoid valve.

[0009] Several longitudinally arranged storage spaces are provided on both sides of the hollow cavity, and the storage spaces are separated from the hollow cavity by a first perforated plate; the longitudinally arranged storage spaces are separated by a sealing plate.

[0010] The hollow cavity is closed near the cabinet door and back panel, which means that the storage spaces on both sides of the hollow cavity are connected to the middle cavity through the first perforated plate, and there is no direct connection between the longitudinally arranged storage spaces; by adjusting the arrangement of the through holes in the second perforated plate, the flow rate of the gas between the storage space and the hollow cavity can be adjusted.

[0011] Each storage space is equipped with an independent cabinet door, and a sealing strip is provided on the outer edge of the storage space; a humidity sensor is installed on the lower side panel inside each storage space, and each storage space includes at least two placement slots; the nitrogen cabinet shell is equipped with at least one barometer and an air vent.

[0012] It also includes a main controller, which receives humidity data from the humidity sensor and sends open / close commands to the solenoid valve connected to the nitrogen inlet based on the humidity data.

[0013] Preferably, the nitrogen inlet is connected to a nitrogen pipeline, which extends from the nitrogen inlet to the bottom last layer of storage space.

[0014] The nitrogen pipeline includes a main nitrogen pipeline and branch pipelines. The main pipeline and the branch pipelines are connected in terms of flow. The number of branch pipelines matches the number of storage spaces. The nitrogen outlet of the branch pipelines is connected to the storage space.

[0015] Preferably, the nitrogen inlet is equipped with a temperature sensor to monitor the nitrogen temperature in the input cavity.

[0016] Preferably, the nitrogen cabinet also includes an RFID reader for identifying whether the product placed inside carries an electronic tag.

[0017] Preferably, the main controller receives data from all humidity sensors, comprehensively analyzes the overall humidity data of the storage cabinet, and sends an open / close command to the solenoid valve connected to the nitrogen inlet based on the overall humidity data of the storage cabinet.

[0018] Beneficial effects: By setting up an intermediate cavity as a buffer module, the manufacturing cost problem of nitrogen cabinets is solved, and the requirement for high humidity control is also met.

[0019] A smart nitrogen cabinet is provided, comprising several combinations of the aforementioned nitrogen cabinets and a smart operating console, wherein the smart operating console is equipped with a display and a host connected to the display; wherein the nitrogen inlet is located at the bottom of the hollow cavity; a nitrogen generator is provided below the several combinations of nitrogen cabinets, and the output pipe of the nitrogen generator is respectively connected to the nitrogen inlet of each nitrogen cabinet.

[0020] The door of the nitrogen cabinet is opened and closed by an electromagnetic lock, which is communicatively connected to the main controller.

[0021] The host is connected to the main controller of the nitrogen cabinet. The host receives data transmitted by the main controller and displays it on the monitor.

[0022] The display shows the temperature and humidity of each storage space, the product number stored in each storage space, and the storage status of each storage space.

[0023] The host computer sends the opening and closing commands to the electromagnetic locks of the corresponding cabinet doors via the main controller.

[0024] Beneficial effects: The two-level control scheme enables unified control of large nitrogen cabinets, and the edge control approach reduces the data processing pressure on the host computer.

[0025] Preferably, it also includes a work card identification system, including an RFID reader for reading the work card number carried by the worker, and the host opens access permissions based on the identified work card number.

[0026] A management method for an intelligent nitrogen cabinet is proposed, which uses the aforementioned intelligent nitrogen cabinet with a work card identification system, and includes the following steps:

[0027] Determine the access permissions of the current operation object based on the identified work card number;

[0028] In response to an external command to store or retrieve, the system receives the product number for storage or retrieval from the external input, locates the corresponding storage space based on the product number, and sends an opening command to the electromagnetic lock of the corresponding cabinet door.

[0029] If the received product number for storage or retrieval does not match the access permissions of the current operation object, an alarm message will be issued.

[0030] Update the storage status of the corresponding storage space based on the external storage or retrieval command, the externally input storage or retrieval product number, and the corresponding storage space.

[0031] In several combinations of nitrogen cabinets, the humidity level requirements for products stored in the same nitrogen cabinet are the same.

[0032] Beneficial effects: By configuring a work card recognition system, different management permissions can be configured, and access operations can be recorded to update the storage status of each storage space in real time, thus achieving intelligent management. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the external structure of a nitrogen tank.

[0035] Figure 2 This is a schematic diagram of the internal structure of a nitrogen tank.

[0036] Figure 3 This is a schematic diagram of the internal structure of another nitrogen tank;

[0037] Figure 4 This is a schematic diagram of the structure of an intelligent nitrogen cabinet;

[0038] Figure 5 This is a flowchart illustrating the management method of the intelligent nitrogen cabinet;

[0039] Figure 6 This is a flowchart of the method disclosed in Example 3. Detailed Implementation

[0040] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0041] A nitrogen cabinet, such as Figure 1 , Figure 2 and Figure 3 It includes the following structures:

[0042] The nitrogen tank shell includes a top plate, a bottom plate, a back plate, and side plates;

[0043] The nitrogen cabinet has a hollow cavity 10 running from top to bottom in the middle, and a nitrogen inlet 11 is provided at the top of the hollow cavity;

[0044] The hollow cavity 10 has several longitudinally arranged storage spaces 20 on both sides, and the storage spaces 20 are separated from the hollow cavity 10 by a first perforated plate 21; the longitudinally arranged storage spaces 20 are separated by a sealing plate 22.

[0045] The hollow cavity is closed near the cabinet door and back panel, which means that the storage spaces on both sides of the hollow cavity are connected to the middle cavity through the first perforated plate, and there is no direct connection between the longitudinally arranged storage spaces; by adjusting the arrangement of the through holes in the second perforated plate, the flow rate of the gas between the storage space and the hollow cavity can be adjusted.

[0046] Each storage space is equipped with an independent cabinet door 12, and a sealing strip 13 is provided on the outer edge of the storage space. After the cabinet door is closed, the storage space is isolated from the outside of the nitrogen cabinet.

[0047] A humidity sensor 14 is installed on the lower side panel inside each storage space; the nitrogen cabinet shell is equipped with at least one barometer and an air vent.

[0048] In this solution, the intermediate cavity serves as the nitrogen inlet chamber. Nitrogen enters the storage spaces on both sides of the intermediate cavity through a perforated plate connected to it, fulfilling the basic requirement of nitrogen dehumidification. Sealing plates separate the layers, and each storage space has a sealing strip on its outer surface that matches the cabinet door. When the cabinet door is closed, the storage space is isolated from the outside air of the nitrogen cabinet. When one cabinet door is opened, the intermediate cavity acts as a buffer unit, mitigating air convection in other storage spaces and reducing the entry of outside air into those closed spaces. Compared to existing nitrogen cabinets where each storage space is independent, this solution saves on production costs. Compared to existing nitrogen cabinets where all spaces are interconnected and have only two doors, this solution significantly improves the accuracy of humidity control and energy efficiency within the nitrogen cabinet.

[0049] The main controller receives data from all humidity sensors and comprehensively analyzes the overall humidity data of the storage cabinet; based on the overall humidity data of the storage cabinet, it sends open / close commands to the solenoid valve connected to the nitrogen inlet.

[0050] In this solution, a humidity sensor 14 is installed on the lower side panel inside each storage space. When the data of one of the humidity sensors exceeds the threshold, nitrogen input is activated, and nitrogen is input from the nitrogen inlet at the top of the hollow cavity.

[0051] The method for comprehensively analyzing the overall temperature and humidity data of the storage cabinet also includes: if the maximum and minimum humidity data in all collected storage space data are both greater than the preset standard humidity, then nitrogen input is started immediately; if there are fewer than n humidity data that do not meet the standard (n is preferably 1), and all other data are less than the preset standard humidity, then nitrogen input is started after a delay; if all data have reached the standard within the delay of x seconds, then the delayed start command is interrupted.

[0052] For this type of product, tests have shown that the number of nitrogen cycles is significantly reduced. The nitrogen cabinet proposed in this application was placed in the same laboratory environment as a nitrogen cabinet with all spaces being electrically connected; Product 1 is the product proposed in this application, and Product 2 is a common double-door nitrogen cabinet. After opening the cabinet door, the storage space of Product 2 is basically connected to the external space (equipped with sensors).

[0053] 1) Set the humidity to 30% RH and the nitrogen flow rate to 5 L / min;

[0054] 2) If the door is opened 6 times a day (the opening time and number of openings are set the same for both products), the humidity will rise due to the opening of the door, causing the nitrogen delivery equipment to start and fill the cabinet with nitrogen.

[0055] The data for March 14th, from 00:00 to 23:59, is as follows:

[0056] Product 1 (This Product) Product 2 (Existing Product) Total startup time 47min 159min Startup count 4 7

[0057] Product 2 has a total of 159 minutes of nitrogen filling time. Due to the increase in humidity, the nitrogen cabinet was being filled with nitrogen. In addition, the humidity may fluctuate slightly, and the nitrogen delivery equipment will start briefly. It is estimated that the nitrogen cabinet was filled with nitrogen for a maximum of 180 minutes in 24 hours on March 14. During the rest of the time, the nitrogen filling stopped because the door was not opened and the amount of nitrogen was sufficient to maintain the humidity requirements of the cabinet.

[0058] The nitrogen consumption of this nitrogen holder on that day is:

[0059] Q2 = 5 liters / minute * 60 minutes * 3 hours = 900 liters / unit

[0060] Similarly, Product 1 had a total of 47 minutes of nitrogen filling time due to rising humidity. Including the estimated instantaneous start-up time, it is estimated that the nitrogen cabinet spent a maximum of 60-70 minutes filling with nitrogen on March 14th (24 hours). Furthermore, the experiment shows that within the six door openings, for Product 1, two door openings did not cause the humidity to rise above the threshold. Additionally, it can be seen that although the number of start-ups was not significantly less than that of Product 2, the duration of each nitrogen filling cycle was shorter.

[0061] Q1 = 5 liters / minute * 60 minutes * 1 hour = 300 liters / unit.

[0062] Note: The above values ​​are estimates based on actual recorded start-up times and are not precise energy calculations.

[0063] As a preferred option, such as Figure 3 The nitrogen inlet connects to the nitrogen pipeline, which extends from the nitrogen inlet to the bottom last storage space. The nitrogen inlet is equipped with a convenient assembly port, such as a threaded assembly port, so that the matching nitrogen pipeline can be installed directly.

[0064] The nitrogen pipeline includes a main pipeline 23 and a branch pipeline 24. The main pipeline 23 and the branch pipeline 24 are connected in terms of flow. The number of branch pipelines 24 matches the number of storage spaces 20. The nitrogen outlet of the branch pipeline 24 is connected to the storage space 20.

[0065] This solution further optimizes the nitrogen input scheme. Since the intermediate chamber acts as a buffer module, when one storage space is opened, the humidity levels in other storage spaces may not necessarily exceed the threshold. Using the entire intermediate chamber as the nitrogen input space would result in low circulation efficiency. By setting up branch lines, more precise point control is possible. Each branch line is equipped with an individual solenoid valve. All solenoid valves are communicatively connected to the main controller.

[0066] If the humidity level in the storage space exceeds the threshold or shows a continuous upward trend exceeding the preset rate, the corresponding diversion pipeline solenoid valve will be activated separately. In this solution, the intermediate chamber also acts as a buffer, but the humidity control is faster. Structurally, there is no need to change the original factory configuration; simply screw the pipeline on and program the corresponding solenoid valve protocol into the main controller system.

[0067] As a preferred option, the nitrogen inlet is equipped with a temperature sensor to monitor the nitrogen temperature in the input cavity.

[0068] As a preferred embodiment, each storage space includes longitudinally arranged subspaces, which are separated by a second perforated plate 15.

[0069] As a preferred embodiment, the two sides of the second perforated plate 15 in each storage space are U-shaped, with the protruding parts of the U-shape serving as mounting parts for placement or installation on the side wall of the nitrogen cabinet and the first perforated plate 21. The recessed parts of the U-shape serve as ventilation parts, facilitating nitrogen circulation.

[0070] As a preferred option, each cabinet door has a device storage label on its outer side, which displays the device type, humidity requirements, and temperature requirements.

[0071] Example 2:

[0072] like Figure 4 A smart nitrogen cabinet is provided, comprising several combinations of the aforementioned nitrogen cabinets, and a smart operating console 30. The smart operating console 30 is equipped with a display and a host computer (generally a purchased all-in-one machine) connected to the display. The nitrogen inlet is located at the bottom 31 of the hollow cavity. A nitrogen generator is provided below the several combinations of nitrogen cabinets, and the output pipe of the nitrogen generator is connected to the nitrogen inlet of each nitrogen cabinet. A large storage cabinet includes at least two nitrogen cabinets as described in Embodiment 1.

[0073] The door of the nitrogen cabinet is opened and closed by an electromagnetic lock, which is communicatively connected to the main controller.

[0074] The host is connected to the main controller of the nitrogen cabinet. The host receives data transmitted by the main controller and displays it on the monitor.

[0075] The display shows the temperature and humidity of each storage space, the product number stored in each storage space, and the storage status of each storage space.

[0076] The host computer sends the opening and closing commands to the electromagnetic locks of the corresponding cabinet doors via the main controller.

[0077] A two-level control scheme is adopted to achieve unified control of large nitrogen cabinets, and the data processing pressure of the host is reduced based on the concept of edge control.

[0078] Preferably, it also includes a work card identification system, including an RFID reader for reading the work card number carried by the worker, and the host opens access permissions based on the identified work card number.

[0079] A management method for intelligent nitrogen cabinets is proposed, employing the aforementioned intelligent nitrogen cabinet with a work card identification system, such as... Figure 5 This includes the following steps:

[0080] Determine the access permissions of the current operation object based on the identified work card number;

[0081] In response to an external command to store or retrieve, the system receives the product number for storage or retrieval from the external input, locates the corresponding storage space based on the product number, and sends an opening command to the electromagnetic lock of the corresponding cabinet door.

[0082] If the received product number for storage or retrieval does not match the access permissions of the current operation object, an alarm message will be issued.

[0083] Update the storage status of the corresponding storage space based on the external storage or retrieval command, the externally input storage or retrieval product number, and the corresponding storage space.

[0084] In several combinations of nitrogen cabinets, the humidity level requirements for products stored in the same nitrogen cabinet are the same.

[0085] In this solution, the storage status within each storage space does not need to be implemented through other hardware. As long as the operator logically inputs the correct product number and stores it correctly in the corresponding storage space, intelligent management can be achieved solely through software control.

[0086] Example 3:

[0087] Based on the content disclosed in Embodiment 1, a nitrogen cabinet is further disclosed for space status management within a storage space.

[0088] Each storage space is provided with at least one placement slot 16. A first label is provided on the surface of the placement slot 16. A shielding layer is provided above the first label. The shielding layer is away from the first label when there is no external pressure, and close to the first label when external pressure is applied, so that the signal of the first label is shielded.

[0089] A card reader and a main controller are installed on one side of the top plate of the nitrogen cabinet. The card reader is connected to the main controller, and the main controller is remotely connected to the central control console.

[0090] The card reader is used to identify the first tag signal. It determines whether there is an item in the placement slot by whether the first tag signal is received. Based on the time when the card reader receives the first tag signal and the time when it cannot receive the first tag signal, it obtains the time when the product is put into and taken out of the placement slot and transmits it to the main controller for recording and management.

[0091] The first tag information includes: storage space number, placement slot number, and electronic component type number.

[0092] It also includes a display that shows the storage space number and whether there is a product (storage status) in the corresponding storage space, for example:

[0093] YJ01—Empty; YJ02—Full.

[0094] For a storage space comprising longitudinally arranged subspaces separated by a second perforated plate, the numbering format can be modified, for example: YJ01-L—empty; YJ01-R—full.

[0095] The main controller carries a remote transmission module, enabling connection with a remote control console. It displays the first tag signal, time information, and the storage status of the corresponding storage space on the console's monitor. During on-site operation, staff can directly determine whether there are empty slots in the corresponding storage space based on the display on the nitrogen cabinet. Compared to nitrogen cabinets without viewing windows, this reduces unnecessary actions of opening the cabinet door to check the storage space. Furthermore, compared to nitrogen cabinets with viewing windows such as glass windows, ordinary cabinet doors are cheaper to manufacture and have more mature technology.

[0096] As a preferred option, the card reader is also used to identify whether the product carries an electronic tag, which is a second tag.

[0097] The card reader is also used to identify a second tag carried by an item placed on the slot, and the second tag emits a second tag signal;

[0098] The second label is an easy-tear label, which is placed at the opening of the product packaging bag. After the packaging bag is opened, the easy-tear label is torn off, and the card reader will not be able to read the signal of the second label.

[0099] In the above, "tag signal" can be understood as the signal that the card reader can receive; "tag information" is the data carried by the tag signal, such as storage space number, placement slot number, electronic component type number, etc.

[0100] After being unpacked, moisture-sensitive components typically require drying before being returned to the storage cabinet to ensure continuous storage. However, baking techniques are complex. Baking temperatures can cause pin oxidation or excessive intermetallic growth, thereby reducing pin solderability.

[0101] Therefore, based on the method of room temperature drying, for SMD products with a moisture sensitivity level of 2-4 after being opened from moisture-proof packaging, if they are exposed to an environment of less than or equal to 30℃ / 60% RH, they can be placed in a room temperature drying oven with a humidity of 10% RH and stored for more than 5 times the exposure time to restore their original workshop life.

[0102] For SMD products with a moisture sensitivity level of 5-5a that have been opened from moisture-proof packaging, if exposed to an environment of less than or equal to 30℃ / 60%RH, placing them in a room temperature drying oven with a humidity of 10%RH and storing them for more than 10 times the exposure time can restore their original workshop life.

[0103] The above requirements are derived from IPC-M-109 and the protection document for moisture-sensitive components in the electronics industry. Based on the instructions in that document, this application combines the nitrogen cabinet and easy-tear electronic tag proposed in Example 1. A method for storing and managing electronic components is disclosed, such as... Figure 6 The steps shown are as follows:

[0104] Place or retrieve electronic components according to the storage labels on the cabinet doors;

[0105] In response to the device placement state from present to absent, the timing unit of the main controller is triggered to start timing and obtain timestamp A;

[0106] For the same placement slot location, in response to the device placement state from zero to one:

[0107] If a second tag signal is detected and the current placement slot has a timestamp A, then stop timing, clear the cache, and record the current second tag information;

[0108] If the second tag signal is not detected and the current placement slot has a timestamp A, determine whether the currently received humidity data meets the requirements. 1) If it meets the requirements, obtain the first time data based on the time length from timestamp A to the current time, calculate the second time data based on the first time data, start timing, obtain timestamp B, and calculate the time data that allows the cabinet door to be opened based on the second time data and timestamp B.

[0109] 2) If the humidity does not meet the requirements, fill the storage cabinet with nitrogen until the humidity data meets the requirements. After the humidity data meets the requirements, calculate the allowable time data for opening the cabinet door according to step 1).

[0110] This is the software logic that first removes the unopened product, and then puts the opened product back in. If an opened product is detected...

[0111] Wherein, the first time data is the first exposure time of the electronic component, and the first time data is greater than the second exposure time of the electronic component exposed to an environment that does not meet the humidity value;

[0112] The second time data is n times the first exposure time, and the value of n is calculated based on the requirement that the electronic components be placed back in the nitrogen cabinet and dried in an environment with the required humidity to restore the workshop life.

[0113] When the slot is empty, the card reader can read the first tag signal with the corresponding number based on the heartbeat.

[0114] When the slot is full, the card reader cannot read the first tag signal with the corresponding number within a preset time.

[0115] In response to the removal of an unopened product, the card reader receives the signal of the first tag that was previously covered, but the card reader does not receive the signal of the second tag; this state is the device placement state from present to absent.

[0116] In response to the insertion of an unopened product, the card reader's state for receiving the first tag signal changes from present to absent, i.e., it is blocked; the card reader's state for receiving the second tag signal changes from absent to present; this state is the device placement state from absent to present.

[0117] When an unsealed product is placed inside, the card reader's status changes from receiving the first tag signal to not receiving it, i.e., it is blocked; at the same time, the card reader does not receive the second tag signal.

[0118] The unsealed product has been removed, and the card reader's status changes from receiving the first tag signal to receiving it; simultaneously, the card reader has not received the second tag signal. See Table 1 below:

[0119] Table 1

[0120]

[0121]

[0122] The first label signal indicates whether there is an item in the placement slot, and the second label signal indicates whether the product has been opened, as well as information such as the product number.

[0123] It also includes a management and display module, which records the items currently stored or the items last taken in the corresponding storage space. If a slot in the current storage space is empty, it displays a sign indicating that the slot number is empty, and also displays the time of the last item taken, as well as the product number (electronic component type number) of the last item taken.

[0124] The display method for the management display module is as follows:

[0125] For example, taking product number XP00001 as an example, and a three-layer nitrogen cabinet as an example, with two storage spaces per layer, two sub-spaces per storage space, and one placement slot per sub-space; placement slot numbers: UL01, UL02; UR01, UR02; ML01, ML02; MR01, MR02; BL01, BL02; BR01, BR02;

[0126] The surface of the nitrogen cabinet is equipped with a display screen. As a preferred option, after the host records the data, it displays the time of the last storage and retrieval activity of the corresponding placement slot. For example, "UL01: XP00001: 2023.06.13.12.00: empty" means that the UL01 storage box contains the product with the number XP00001, and the placement slot is empty after the operation on 2023.06.13.12.00.

[0127] "UL01:XP00001:2023.06.13.16.00:full" means that after the operation on 2023.06.13.16.00, the storage slot in the UL01 storage box is full and contains the product with the serial number XP00001.

[0128] For products that have been opened, the nitrogen cabinet cannot directly identify the product number (such as the electronic component type number). Staff need to locate the original placement position and re-enter the product number when placing the product.

[0129] As a preferred approach, in response to an externally input product number, the system retrieves the data record of the product from the previous retrieval and finds the corresponding storage space.

[0130] Once the product number after unpacking is recorded in the current nitrogen cabinet management system, the processor can retrieve the corresponding product removal event. Based on the removal time and the current placement time, it first calculates whether the standard exposure time has been exceeded. If the standard exposure time has been exceeded, an alarm message is issued. As a preferred option, to save the processor's processing load, after the electronic component is removed, the timing unit counts for a first preset time, clears the timing data, and marks the removed electronic component number. The first preset time is greater than the maximum exposure time of the electronic component.

[0131] If the exposure time does not exceed the standard requirements, the product can be placed in the storage cabinet, and the timing unit will be called to obtain timestamp A. When the placement time exceeds 5 times the exposure time, the timing will stop, and the time data will be stored. The first time data is the storage time of the unsealed product in a suitable humidity environment after it has been re-placed into the storage cabinet; the second time data is the exposure time multiplied by n. For example, if a product is placed in at 9:00 AM, and the last time it was removed was 6:00 AM, the exposure time is no more than 3 hours. Therefore, the second time data is calculated as 3 hours * 5, so timestamp A is 9:00 AM on March 1st, xx year; timestamp B is 00:00 AM on March 2nd, xx year. The time data for allowing the cabinet door to be opened is after 00:00 AM on March 2nd, xx year.

[0132] Before the timer is complete, the current storage space cannot be opened and can be marked as a red warning on the corresponding location on the display screen.

[0133] If an operator mistakenly stores an unsealed product that does not belong to this nitrogen cabinet, and the processor does not match the corresponding product retrieval event when the operator enters the product number, an alarm message will be displayed.

[0134] While operating according to the above management logic, the sensor monitoring system remains unaffected, continuing to introduce nitrogen according to its original logic to control the humidity inside the nitrogen cabinet to be below 10% RH (or other preset values); and adjusting the corresponding humidity monitoring data and response requirements according to the storage requirements of different products.

[0135] Other points to note are that the vent of the nitrogen cabinet proposed in this application includes an active vent or a passive vent. The passive vent is driven to release gas according to the gas pressure inside the nitrogen cabinet. The active vent is equipped with a solenoid valve, which is opened by the main controller according to the gas pressure collected by the barometer and the preset gas pressure threshold.

[0136] In conjunction with the above-described electrical cabinet structure and method, the vents can be located in the central cavity or on the side wall of each storage space. Experiments have shown that it is more suitable to place the active vents in the central cavity, while it is more suitable to place the passive vents on the side wall of each storage space.

[0137] For nitrogen cabinets equipped with nitrogen pipelines, the vent can be located in the central cavity; for nitrogen cabinets without nitrogen pipelines, the vent can be located on the side wall of each storage space. This facilitates nitrogen exchange.

[0138] The specific structural design of the vent is common knowledge in this field and will not be elaborated here.

[0139] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this patent concept are included within the protection scope of this patent. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the structure of this invention or exceed the scope defined in these claims, they should all fall within the protection scope of this invention.

Claims

1. A nitrogen holder, characterized in that, Includes the following structure: The nitrogen tank shell includes a top plate, a bottom plate, a back plate, and side plates; The nitrogen cabinet has a hollow cavity running from top to bottom in the middle, and a nitrogen inlet is provided at the top or bottom of the hollow cavity. The nitrogen inlet is connected to a solenoid valve. Several longitudinally arranged storage spaces are provided on both sides of the hollow cavity, and the storage spaces are separated from the hollow cavity by a first perforated plate; the longitudinally arranged storage spaces are separated by a sealing plate. The hollow cavity is closed near the cabinet door and back panel, which means that the storage spaces on both sides of the hollow cavity are connected to the middle cavity through the first perforated plate, and there is no direct connection between the longitudinally arranged storage spaces; by adjusting the arrangement of the perforations in the first perforated plate, the flow rate of the gas between the storage space and the hollow cavity can be adjusted. Each storage space is equipped with an independent cabinet door, and a sealing strip is installed on the outer edge of the storage space; Each storage space has a humidity sensor installed on the lower side panel inside, and each storage space includes at least two placement slots; the nitrogen cabinet shell is equipped with at least one barometer and an air vent. It also includes a main controller, which receives humidity data from the humidity sensor and sends an open / close command to the solenoid valve connected to the nitrogen inlet based on the humidity data; A card reader and a main controller are installed on one side of the top plate of the nitrogen cabinet. The card reader is connected to the main controller, and the main controller is remotely connected to the central control console. Each storage space is provided with at least one placement slot. A first label is provided on the surface of the placement slot. A shielding layer is provided above the first label. The shielding layer is away from the first label when there is no external pressure. When external pressure is applied, it is close to the first label, and the signal of the first label is shielded. The system determines whether an item is placed in the placement slot by whether the card reader receives the signal of the first tag. Based on the time when the card reader receives the signal of the first tag and the time when it does not receive the signal of the first tag, the system obtains the time when the product is put in and taken out of the placement slot and transmits it to the main controller for recording and management. The card reader is also used to identify the second tag carried by the item placed in the placement slot, and the second tag emits a second tag signal. The second label is an easy-tear label, which is placed at the opening of the product packaging bag. After the packaging bag is opened, the easy-tear label is torn off, and the card reader will not be able to read the signal of the second label. Place or retrieve electronic components according to the storage labels on the cabinet doors; In response to the device placement state from present to absent, the timing unit of the main controller is triggered to start timing and obtain timestamp A; For the same placement slot location, in response to the device placement state from zero to one: If a second tag signal is detected and the current placement slot has a timestamp A, then stop timing, clear the cache, and record the current second tag information; If the second tag signal is not detected and the current placement slot has a timestamp A, determine whether the currently received humidity data meets the requirements. 1) If it meets the requirements, obtain the first time data based on the time length from timestamp A to the current time, calculate the second time data based on the first time data, start timing, obtain timestamp B, and calculate the time data that allows the cabinet door to be opened based on the second time data and timestamp B. 2) If the humidity does not meet the requirements, fill the storage cabinet with nitrogen until the humidity data meets the requirements. After the humidity data meets the requirements, calculate the allowable time data for opening the cabinet door according to step 1).

2. The nitrogen holder according to claim 1, characterized in that, The nitrogen inlet is connected to the nitrogen pipeline, which extends from the nitrogen inlet to the bottom last layer of storage space. The nitrogen pipeline includes a main pipeline and branch pipelines. The main pipeline and branch pipelines are connected in terms of flow. The number of branch pipelines matches the number of storage spaces. The nitrogen outlet of the branch pipeline is connected to the storage space.

3. The nitrogen holder according to claim 1, characterized in that, The nitrogen inlet is equipped with a temperature sensor to monitor the nitrogen temperature in the input cavity.

4. The nitrogen holder according to claim 1, characterized in that, The main controller receives data from all humidity sensors and comprehensively analyzes the overall humidity data of the storage cabinet; based on the overall humidity data of the storage cabinet, it sends open / close commands to the solenoid valve connected to the nitrogen inlet.

5. An intelligent nitrogen cabinet, characterized in that, The system includes several combinations of nitrogen cabinets as described in any one of claims 1-4, and an intelligent control panel, wherein the intelligent control panel is equipped with a display and a host connected to the display; wherein the nitrogen inlet is located at the bottom of the hollow cavity; a nitrogen generator is provided below the several combinations of nitrogen cabinets, and the output pipe of the nitrogen generator is respectively connected to the nitrogen inlet of each nitrogen cabinet. The door of the nitrogen cabinet is opened and closed by an electromagnetic lock, which is communicatively connected to the main controller. The host is connected to the main controller of the nitrogen cabinet. The host receives data transmitted by the main controller and displays it on the monitor. The display shows the temperature and humidity of each storage space, the product number stored in each storage space, and the storage status of each storage space. The host computer sends the opening and closing commands to the electromagnetic locks of the corresponding cabinet doors via the main controller.

6. The nitrogen holder according to claim 5, characterized in that, It also includes a work card identification system, including an RFID reader, used to read the work card number carried by the staff, and the host opens access permissions based on the identified work card number.

7. A management method for an intelligent nitrogen cabinet, characterized in that, The intelligent nitrogen cabinet according to claim 6 includes the following steps: Determine the access permissions of the current operation object based on the identified work card number; In response to an external command to store or retrieve, the system receives the product number for storage or retrieval from the external input, locates the corresponding storage space based on the product number, and sends an opening command to the electromagnetic lock of the corresponding cabinet door. If the received product number for storage or retrieval does not match the access permissions of the current operation object, an alarm message will be issued. Update the storage status of the corresponding storage space based on the external storage or retrieval command, the externally input storage or retrieval product number, and the corresponding storage space.

8. The management method for the intelligent nitrogen cabinet according to claim 7, characterized in that, In several combinations of nitrogen cabinets, the humidity level requirements for products stored in the same nitrogen cabinet are the same.

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