Guard detection method and device for safety cabinet, and safety cabinet

Abstract

The application relates to the technical field of laboratory safety detection, and discloses a protection detection method for a safety cabinet. The safety cabinet comprises a cabinet body, an inlet is formed in the side wall of the cabinet body, a fan is arranged in the cabinet body and located above the inlet, an operation table is arranged in the cabinet body and located below the inlet, an air inlet is arranged on the operation table, and a filtering module is arranged below the operation table. Under the action of the fan, airflow enters the cabinet body through the air inlet, forms an air return channel in the cabinet body after passing through the filtering module, and forms an airflow air curtain at the inlet. The protection detection method comprises the following steps: detecting the air resistance of the airflow air curtain passing through the filtering module to obtain an air resistance detection value; and determining that the filtering module is invalid when the air resistance detection value is greater than a resistance threshold value. In the case that the filtering module is invalid, the experimental operator can be reminded in time, and the accuracy and timeliness of protection detection are improved. The application further discloses a protection detection device for the safety cabinet and the safety cabinet.

Description

Technical Field

[0001] This application relates to the field of laboratory safety testing technology, such as a protective testing method and device for safety cabinets, and a safety cabinet. Background Technology

[0002] A biosafety cabinet is a common laboratory device that draws air outwards, maintaining a negative pressure environment inside the cabinet. It is designed to protect the operator, the laboratory environment, and the experimental materials from infectious aerosols and splashes that may be generated during the handling of primary cultures, bacterial and viral strains, and diagnostic specimens. Inside a biosafety cabinet, personnel are typically protected by vertical airflow from the work surface, and the air within the device is filtered and circulated through a combination of fans and ductwork.

[0003] In related technologies, a method for measuring and monitoring the wind speed of a biosafety cabinet is provided. By detecting the wind speed of the vertical airflow that plays a protective role inside the biosafety cabinet, an alarm signal is promptly issued when the wind speed is abnormal, notifying the user that there is a safety risk in the system.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art:

[0005] When determining the protective effectiveness of vertical airflow based on wind speed, wind speed readings are easily affected by airflow fluctuations, leading to measurement errors and consequently affecting the accuracy of the protective test. Summary of the Invention

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a method and apparatus for testing the protective function of a safety cabinet, as well as a safety cabinet, to improve the accuracy of testing the protective function of the safety cabinet.

[0008] This disclosure provides a protective detection method for a safety cabinet, the safety cabinet comprising: a cabinet body with an entrance on the side wall; a fan disposed inside the cabinet body and located above the entrance; an operating platform disposed inside the cabinet body and located below the entrance, the operating platform having an air inlet; and a filter module disposed below the operating platform; under the action of the fan, airflow enters the cabinet body through the air inlet, passes through the filter module, forms a return air channel inside the cabinet body, and forms an airflow curtain at the entrance;

[0009] The protection detection method includes: detecting the air resistance of the airflow curtain passing through the filter module and obtaining an air resistance detection value; if the air resistance detection value is greater than the resistance threshold, determining that the filter module has failed.

[0010] Optionally, the wind resistance detection value includes the wind resistance detection value of the airflow curtain passing through multiple areas of the filter module; wherein each area has a corresponding wind resistance detection value.

[0011] Optionally, the situation where the wind resistance detection value is greater than the resistance threshold includes:

[0012] Multiple wind resistance readings are all greater than the resistance threshold; or,

[0013] Some of the multiple wind resistance test values ​​are greater than the resistance threshold.

[0014] Optionally, the protection detection method for the safety cabinet further includes: determining the minimum value among the plurality of wind resistance detection values ​​when all wind resistance detection values ​​are less than the resistance threshold; and determining the usage status of the filter module based on the wind resistance deviation values ​​of each wind resistance detection value other than the minimum value from the minimum value.

[0015] Optionally, determining the usage status of the filtering module includes:

[0016] If any of the wind resistance deviations between each wind resistance detection value and the minimum value is greater than the deviation threshold, then the filter module is determined to be partially ineffective.

[0017] Optionally, the protection detection method for safety cabinets also includes:

[0018] If the wind resistance detection value indicates that the filter module has not completely failed, the interval for protection detection is determined based on the wind resistance detection value; the time after the current time, which is separated from the current time by the interval, is taken as the next detection time.

[0019] Optionally, determining the interval duration for protection testing based on the wind resistance detection value includes:

[0020] The interval duration for protection detection is determined based on the detection difference between the resistance threshold and the wind resistance detection value; the detection difference is positively correlated with the current interval duration.

[0021] In some embodiments, the protective detection device for a safety cabinet includes a processor and a memory storing program instructions, the processor being configured to execute the protective detection method for a safety cabinet as described above when the program instructions are executed.

[0022] In some embodiments, the safety cabinet includes: a cabinet body with an entrance on a side wall; a fan disposed inside the cabinet body and above the entrance; an operating table disposed inside the cabinet body and below the entrance; an air inlet on the operating table; and a filter module disposed below the operating table. Under the action of the fan, airflow enters the cabinet body through the air inlet, passes through the filter module, forms a return air channel inside the cabinet body, and forms an airflow curtain at the entrance. A wind resistance detection module is configured to detect the wind resistance of the airflow curtain passing through the filter module.

[0023] Optionally, the safety cabinet may also include the protective detection device for the safety cabinet as described above.

[0024] The protective detection method and device for safety cabinets, and the safety cabinets provided in this disclosure can achieve the following technical effects:

[0025] By acquiring the air resistance value after the air curtain passes through the filter module, the usage status of the filter module can be determined based on the relationship between the air resistance value and the resistance threshold. If the filter module is in a failed state, a failure message is displayed, prompting the user to replace the filter module. On one hand, by placing the filter module below the operating table, contaminants in the airflow entering the cabinet from the air inlet can be prevented from accumulating in the cabinet's return air passage. On the other hand, by detecting the air resistance value on the leeward side of the filter module, it can be determined whether the filter module is covered or blocked by foreign objects, preventing airflow and causing the air curtain's protective function to fail. Compared with related technologies, this application analyzes the effectiveness of air circulation by detecting the blockage of the filter module. Since wind speed is not measured, the influence of airflow fluctuations on the detection results is avoided, thereby improving the accuracy of the detection. This application can promptly alert experimental operators in cases of filter module blockage and air curtain failure, improving the accuracy and timeliness of protective detection, and thus improving the accuracy of biosafety cabinet protective detection. This enhances the safety of experimental operators and biological samples.

[0026] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0027] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein:

[0028] Figure 1 This is a schematic diagram of the structure of a safety cabinet provided in an embodiment of this disclosure;

[0029] Figure 2This is a schematic diagram of the filter module structure of the safety cabinet provided in this embodiment;

[0030] Figure 3 This is a schematic flowchart of a protection detection method for a safety cabinet provided in an embodiment of this disclosure;

[0031] Figure 4 This is a schematic flowchart of another protection detection method for a safety cabinet provided in this embodiment of the present disclosure;

[0032] Figure 5 This is a schematic flowchart of another protection detection method for a safety cabinet provided in this embodiment of the present disclosure;

[0033] Figure 6 This is a schematic flowchart of another protection detection method for a safety cabinet provided in this embodiment of the present disclosure;

[0034] Figure 7 This is a schematic diagram of a protective detection device for a safety cabinet provided in an embodiment of this disclosure;

[0035] Figure 8 This is a schematic diagram of another protective detection device for a safety cabinet provided in an embodiment of this disclosure. Detailed Implementation

[0036] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0037] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0038] Unless otherwise stated, the term "multiple" means two or more.

[0039] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0040] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0041] The term "correspondence" can refer to an association or binding relationship. The correspondence between A and B means that there is an association or binding relationship between A and B.

[0042] Figure 1 This is a schematic diagram of the structure of a safety cabinet provided in an embodiment of this disclosure. The safety cabinet includes a cabinet body 100, a fan 101, an operating table 102, and a filter module 103. The cabinet body 100 has an inlet 1001 on its side wall; the fan 101 is located inside the cabinet body 100 and above the inlet 1001; the operating table 102 is located inside the cabinet body 100 and below the inlet 1001, and has an air inlet 1021; the filter module 103 is located below the operating table 102.

[0043] Under the action of the fan 101, the airflow enters the cabinet 100 through the air inlet 1021, passes through the filter module 103 and forms a return air channel 104 in the cabinet 100, and forms an airflow curtain at the inlet 1001.

[0044] In this way, the airflow entering the cabinet 100 forms a downward airflow curtain at the inlet 1001 of the cabinet 100 under the strong convection of the fan 101. After passing through the bottom filter module 103, the airflow returns to the top fan 101 through the return air channel 104 at the back of the cabinet and enters the next cycle.

[0045] The aforementioned airflow curtain is formed by the negative pressure created at the inlet 1001 by the air supplied by the fan 101. This airflow curtain prevents air from escaping from the biosafety cabinet. Simultaneously, by installing a filter module below the operating table, it prevents external air from entering the biosafety cabinet and contaminating the biological samples placed on the operating table, and avoids contaminants in the airflow entering the cabinet from the air inlet from remaining in the cabinet's return air duct.

[0046] Optionally, to better detect the protective status of the safety cabinet, the safety cabinet provided in this embodiment of the disclosure further includes:

[0047] The wind resistance detection module 105 is located on the leeward side of the filter module 103 to obtain the wind resistance value after the airflow curtain passes through the filter module 103.

[0048] Furthermore, to monitor the usage status of each area of ​​the filter module 103, this embodiment includes multiple air resistance detection modules 105; these modules are arranged along the width of the airflow curtain on the leeward side of the filter module 103. This allows for the detection of the air resistance value after the airflow curtain passes through each area of ​​the filter module 103. Consequently, in cases of blockage or foreign object accumulation in parts of the filter module 103, the user is promptly alerted to replace or adjust the module.

[0049] Furthermore, after obtaining the usage status of each area of ​​the filter module 103, to facilitate replacement of the filter module 103 in case of abnormal usage, the filter module 103 in this solution consists of multiple filter elements. The multiple filter elements are arranged along the width direction of the airflow curtain; a wind resistance detection module 105 is installed on the leeward side of each filter element. In this way, based on the detected wind resistance value of the airflow curtain after passing through the filter element, it is possible to determine whether the filter element corresponding to the measured wind resistance value is in a failed state, and then replace the failed filter element.

[0050] Figure 2 A schematic diagram of the filter module in an embodiment of this disclosure is shown. Exemplarily, the filter module includes four filter elements 1031 arranged along the width of the airflow curtain; each filter element 1031 has a wind speed sensing module 1051 disposed on its leeward side. In other embodiments of this application, the number of filter elements 1031 can be set according to the size of the designed safety cabinet and the needs of experimental safety.

[0051] In this embodiment, the four filter elements 1031 are arranged at equal widths along the width direction of the airflow curtain to enable detection of the airflow curtain in each area.

[0052] Figure 3 This disclosure provides a protection detection method for safety cabinets, applicable to... Figure 1 The safety cabinet shown is used to determine whether the protective function of the filter module has failed.

[0053] like Figure 3 As shown, the protection detection method for safety cabinets includes:

[0054] In step S301, the processor detects the air resistance as the air curtain passes through the filter module and obtains the air resistance detection value.

[0055] The wind resistance test value refers to the ability of the filter module to block airflow when the air curtain passes through it. The filter module's ability to block airflow is weaker when it is clean compared to its ability to block airflow when it is clogged with foreign objects.

[0056] Here, the wind resistance value can be determined by detecting the wind speed. Specifically, the wind speed after the airflow curtain passes through the filter module is detected by a wind speed sensor located on the leeward side of the filter module, thereby determining the aforementioned wind resistance value. The wind resistance value after the airflow curtain passes through the filter module when it is in an effective state is weaker than the wind resistance value after the airflow curtain passes through the filter module when it is in a failed or partially failed state.

[0057] In step S302, if the wind resistance detection value is greater than the resistance threshold, the processor determines that the filter module has failed.

[0058] Here, the wind resistance detection value is greater than the resistance threshold, indicating that the current filter module's ability to block the airflow curtain has exceeded the blocking ability corresponding to the filter module's filtration performance.

[0059] The resistance threshold is related to the filtration performance of the filter module. The higher the filtration performance of the filter module, the higher the resistance threshold and the stronger its ability to block airflow; the lower the filtration performance, the lower the resistance threshold and the weaker its ability to block airflow.

[0060] Optionally, if the filtering module is determined to be faulty, a first failure message is executed to indicate that the filtering module has failed.

[0061] The first failure message indicates that the filter module corresponding to the current test result is in a failed state. That is, it informs the experimenter that the filter module is currently in a failed state, possibly due to blockage by foreign objects, obstruction, or other abnormalities. Under these circumstances, the airflow curtain protection is ineffective and may not be able to prevent airflow from overflowing from inside the cabinet, affecting the safety of biological samples inside the biosafety cabinet.

[0062] Optionally, if the wind resistance detection value is less than or equal to the resistance threshold, the interval for protection detection is determined based on the wind resistance detection value.

[0063] The time after the current time, which is the interval between the current time and the current time, is taken as the next detection time.

[0064] Here, when the wind resistance detection value is less than or equal to the resistance threshold, it indicates that the filter module is not completely ineffective. In this case, the detection interval can be determined based on the wind resistance detection results.

[0065] In this embodiment, the current detection interval is determined based on the difference between the resistance threshold and the wind resistance detection value.

[0066] Specifically, the aforementioned detection difference is positively correlated with the drag threshold. The smaller the detection difference between the drag threshold and the wind resistance detection value, the shorter the detection interval between the next detection.

[0067] Thus, the protective detection method for biosafety cabinets provided in this disclosure obtains the air resistance value after the air curtain passes through the filter module, and determines the usage status of the filter module based on the relationship between the air resistance value and the resistance threshold. If the filter module is in a failed state, a failure warning message is displayed, prompting the user to replace the filter module. On one hand, by placing the filter module below the operating table, contaminants in the airflow entering the cabinet from the air inlet can be prevented from accumulating in the cabinet's return air channel. On the other hand, by detecting the air resistance value on the leeward side of the filter module, it can be determined whether the filter module is covered or blocked by foreign objects, preventing airflow and causing the air curtain's protective function to fail. Compared with related technologies, this application analyzes the effectiveness of air circulation by detecting the blockage of the filter module. Since no wind speed is detected, the influence of airflow fluctuations on the detection results is avoided, thereby improving the accuracy of the detection. This application can promptly remind experimental operators in cases where the filter module is blocked or the air curtain fails, improving the accuracy and timeliness of protective detection and enhancing the accuracy of biosafety cabinet protective detection. This improves the safety of experimental operators and biological samples.

[0068] When detecting the air resistance value after the air curtain passes through the leeward side of the filter module, if multiple air resistance detection modules are installed on the leeward side of the filter module, the air resistance values ​​of multiple areas of the filter module can be detected. At this time, the usage status of each area of ​​the filter module can be determined based on the detected wind speed values.

[0069] Figure 4 This disclosure provides a protective detection method for a safety cabinet, which describes the detection method when multiple wind resistance detection modules are arranged along the width direction of the airflow curtain on the leeward side of the filter module.

[0070] like Figure 4 As shown, the protection detection method for safety cabinets includes:

[0071] Step S401: The processor detects the air resistance of the airflow curtain passing through the filter module and obtains the air resistance detection value; the air resistance detection value includes the air resistance detection value of the airflow curtain passing through multiple areas of the filter module; wherein, each area has a corresponding air resistance detection value.

[0072] The wind resistance values ​​of some or all areas of the filter module at the same time are obtained by multiple wind resistance detection modules set on the leeward side of the filter module.

[0073] In step S402, if all multiple wind resistance detection values ​​are greater than the resistance threshold, or if some of the multiple wind resistance detection values ​​are greater than the resistance threshold, the processor determines that the filter module has failed.

[0074] Since the resistance threshold is determined by the filtration performance of the filter module, a detection of wind speed exceeding the resistance threshold indicates that the filtration area corresponding to that resistance value has failed. This renders the airflow curtain ineffective, and the filter module is considered faulty. A first failure warning message can be displayed to prompt the user to replace it.

[0075] Step S403: When all wind resistance detection values ​​are less than the resistance threshold, the processor determines the minimum value among multiple wind resistance detection values.

[0076] In step S404, the processor determines the usage status of the filter module based on the resistance deviation values ​​of each resistance detection value other than the minimum value from the minimum value.

[0077] Wind resistance deviation refers to the difference in wind resistance between the two sides when airflow is directed to the side with lower wind resistance due to higher wind resistance on one side.

[0078] When all wind resistance detection values ​​are less than the resistance threshold, it indicates that the filter module is not completely ineffective. In this case, the usage status of the filter module is determined by obtaining the minimum wind resistance detection value and the wind resistance deviation value between the other wind resistance detection values ​​and the minimum value.

[0079] In a non-completely failed state, the filter module's operational status also includes a partially failed state and a fully effective state. A partially failed state means that an abnormality occurs in a portion of the filter module, causing the airflow curtain at that location to fail. A fully effective state means that the entire filter module is functioning normally, and the airflow curtain can perform its protective function correctly.

[0080] Optionally, if there is a wind resistance deviation value greater than the deviation threshold among the wind resistance deviation values ​​of each wind resistance detection value and the minimum value, then the filter module is determined to be partially ineffective.

[0081] Deviation threshold refers to the reasonable deviation range of wind resistance values ​​between different areas of the filter module under all effective conditions.

[0082] At this point, a second failure message can be executed to indicate that the filter module has partially failed. This second failure message indicates that the filter module corresponding to the current detection result is in a partially failed state. That is, it informs the experimenter that the filter module is currently in a partially failed state, and there may be abnormalities such as foreign object blockage or obstruction in some areas. The airflow protection effect is poor under the current conditions, and it is recommended to stop the experiment as soon as possible. The intensity of the second failure message is weaker than that of the first failure message. The intensity of the message can be reflected by the frequency of execution of the message within a set time period.

[0083] Thus, when the deviation between each wind resistance detection value and the minimum value exceeds the deviation threshold, it indicates that the filtration area of ​​the filter module corresponding to the current wind speed detection value is blocked by foreign objects. When the airflow curtain passes through the filter module, the airflow that should flow through this area will flow to the filtration area with the lowest wind resistance value and enter the return air channel. The airflow curtain above this area has failed. At this time, by executing the second failure prompt message, the experimental operator is prompted to replace the filter module as soon as possible or stop the experiment immediately.

[0084] The protective detection method for safety cabinets provided in this disclosure obtains the air resistance value after the air curtain passes through the filter module, and determines the usage status of the filter module based on the relationship between the air resistance value and the resistance threshold. If the filter module is in a failed state, a failure prompt message is executed, reminding the user to replace the filter module. If the filter module is not completely failed, the air resistance deviation values ​​(excluding the minimum value) are obtained from the minimum value to determine whether the filter module is in a partially failed state, and corresponding prompt messages are executed. On the one hand, by placing the filter module below the operating table, pollutants in the airflow entering the cabinet from the air inlet can be prevented from being trapped in the cabinet's return air channel. On the other hand, by detecting the air resistance value on the leeward side of the filter module, it can be determined whether the filter module is covered or blocked by foreign objects, preventing airflow and causing the air curtain's protective function to fail. Compared with related technologies, this application analyzes the effectiveness of air circulation by detecting the blockage of the filter module. Since no wind speed is detected, the influence of airflow fluctuations on the detection results is avoided, thereby improving the accuracy of the detection. This application can promptly alert laboratory operators in situations leading to filter module blockage or airflow curtain failure, improving the accuracy and timeliness of protective detection and thus enhancing the safety of biosafety cabinets. This, in turn, improves the safety of laboratory personnel and biological samples.

[0085] When testing the usage status of the filter module, if filter elements are arranged along the width of the airflow curtain in each filter area of ​​the filter module, and a wind resistance detection module is set on the leeward side of each filter element, the usage status of multiple filter elements can be detected. This allows for timely replacement of some filter elements when they are in a failed state, thus saving consumables while ensuring experimental safety.

[0086] Figure 5 This disclosure provides a protective detection method for a safety cabinet, which describes the detection method when the filter module includes multiple filter elements arranged along the width direction of the airflow curtain, and a wind resistance detection module is set on the leeward side of each filter element.

[0087] like Figure 5As shown, the protection detection method for safety cabinets includes:

[0088] Step S501: The processor detects the air resistance value after the airflow curtain passes through multiple filter elements of the filter module.

[0089] The wind resistance detection module, located on the leeward side of the filter element, is used to obtain the wind resistance value of each filter element.

[0090] In step S502, if the processor determines that the filter module has failed if some or all of the wind resistance detection values ​​are greater than or equal to the resistance threshold.

[0091] Step S503: When all wind resistance detection values ​​are less than the resistance threshold, the processor determines the minimum value among multiple wind resistance detection values.

[0092] Step S504: The processor obtains the wind resistance deviation values ​​of each wind resistance detection value other than the minimum value from the minimum value.

[0093] In step S505, the processor determines the usage status of the filter element corresponding to the wind resistance detection value when the wind resistance deviation value is greater than the deviation threshold as a failure state.

[0094] In step S506, the processor determines the usage status of the filter element corresponding to the wind resistance detection value when the wind resistance deviation value is less than the deviation threshold as the normal state.

[0095] Step S507: If there is a filter element in a failed state, it is determined that the filter module is partially failed.

[0096] Here, when the filter module fails and the second failure message mentioned above is executed, the user can be notified of the filter element in a failed state. This information includes the position of the failed filter element within the filter module. A matrix of indicator lights can be set up to correspond one-to-one with the filter element arrangement order, and the user can be alerted by flashing the indicator light corresponding to the position of the failed filter element.

[0097] Alternatively, the processor can obtain the identification information of the wind resistance detection module when the wind resistance deviation value is greater than the deviation threshold, thereby determining the information of the filter element in a failed state.

[0098] After testing the filter module's operational status, if it is found to be partially functional, it indicates that the airflow curtain still possesses a certain level of protective capability, and the experiment can continue. However, periodic testing is necessary to prevent further malfunctions and potential failure of the filter module during use.

[0099] Figure 6This disclosure provides a protection detection method for a safety cabinet, which describes a method for determining the interval for periodic detection of a filter module when the filter module is not completely ineffective.

[0100] like Figure 6 As shown, the protection detection method for safety cabinets includes:

[0101] Step S601: The processor detects the wind resistance value after the airflow curtain passes through multiple areas of the filter module.

[0102] In step S602, if the processor determines that the filter module has failed if some or all of the wind resistance detection values ​​are greater than or equal to the resistance threshold.

[0103] Since the resistance threshold is determined by the filtration performance of the filter module, a detection of wind speed exceeding the resistance threshold indicates that the filtration area corresponding to that resistance value has failed. This renders the airflow curtain ineffective in its protective function.

[0104] Step S603: When all wind resistance detection values ​​are less than the resistance threshold, the processor determines the minimum value among multiple wind resistance detection values.

[0105] In step S604, the processor determines the usage status of the filter module based on the resistance deviation values ​​of each resistance detection value other than the minimum value from the minimum value.

[0106] In step S605, the processor determines the interval duration for protection detection based on the detection difference between the resistance threshold and the wind resistance detection value.

[0107] Here, the detection interval can be determined based on the wind resistance measurement results. The detection difference is positively correlated with the interval. The smaller the difference between the resistance threshold and the wind resistance measurement value, the shorter the detection interval.

[0108] In cases involving multiple wind resistance measurements, the interval duration is determined based on the difference between the resistance threshold and the maximum value among the wind resistance measurements.

[0109] In step S606, the processor takes the time after the current time, which is the interval between the current time and the current time, as the next detection time.

[0110] Thus, when the filter module is not completely ineffective, determining the detection interval based on the wind resistance detection can reduce unnecessary detection actions and lower the system energy consumption required for protection detection.

[0111] Figure 7 This is a schematic diagram of a protective detection device for a safety cabinet provided in an embodiment of this application. Applied to... Figure 1The safety cabinet shown is equipped with a protective detection device that can be implemented through software, hardware, or a combination of both.

[0112] Combination Figure 7 As shown, the protective detection device for the safety cabinet includes an air resistance detection module 71 and an execution module 72. The safety cabinet includes: a cabinet body with an entrance on the side wall; a fan installed inside the cabinet and above the entrance; an operating platform installed inside the cabinet and below the entrance, with an air inlet on the operating platform; and a filter module installed below the operating platform. Under the action of the fan, airflow enters the cabinet body through the air inlet, passes through the filter module, forms a return air channel inside the cabinet body, and forms an airflow curtain at the entrance.

[0113] The wind resistance detection module 71 is configured to detect the wind resistance of the airflow curtain passing through the filter module and obtain the wind resistance detection value; the execution module 72 is configured to determine that the filter module has failed if the wind resistance detection value is greater than the resistance threshold.

[0114] Figure 8 This is a schematic diagram of a protective detection device for a safety cabinet provided in an embodiment of this disclosure. (In conjunction with...) Figure 8 As shown, the protective detection device for a safety cabinet includes:

[0115] The device includes a processor 80 and a memory 81. Optionally, it may further include a communication interface 82 and a bus 83. The processor 80, communication interface 82, and memory 81 can communicate with each other via the bus 83. The communication interface 82 can be used for information transmission. The processor 80 can call logical instructions stored in the memory 81 to execute the protection detection method for the security cabinet described in the above embodiment.

[0116] Furthermore, the logic instructions in the aforementioned memory 81 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0117] The memory 81, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this disclosure. The processor 80 executes the program instructions / modules stored in the memory 81 to perform functional applications and data processing, thereby implementing the protection and detection method for the security cabinet described above.

[0118] The memory 81 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 81 may include high-speed random access memory and may also include non-volatile memory.

[0119] This disclosure provides a safety cabinet, comprising: a cabinet body with an entrance on a side wall; a fan disposed within the cabinet body and above the entrance; an operating table disposed within the cabinet body and below the entrance, with an air inlet on the operating table; and a filter module disposed below the operating table. Under the action of the fan, airflow enters the cabinet body through the air inlet, passes through the filter module, forms a return air channel within the cabinet body, and forms an airflow curtain at the entrance; and a wind resistance detection module configured to detect the wind resistance of the airflow curtain passing through the filter module.

[0120] Optionally, the safety cabinet also includes the aforementioned protective detection device for the safety cabinet.

[0121] This disclosure provides a storage medium storing computer-executable instructions configured to perform the aforementioned protection detection method for a security cabinet.

[0122] The aforementioned storage medium can be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0123] The technical solutions of this disclosure can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in this disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and other media capable of storing program code; it can also be a transient storage medium.

[0124] The foregoing description and accompanying drawings fully illustrate embodiments of this disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, procedural, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terminology used in this application is for describing embodiments only and is not intended to limit the claims. As used in the description of embodiments and claims, the singular forms “a,” “an,” and “the” are intended to equally include the plural forms unless the context clearly indicates otherwise. Similarly, the term “and / or” as used in this application means including one or more of the associated listed items and all possible combinations thereof. Additionally, when used in this application, the term "comprise" and its variations "comprises" and / or "comprising" refer to the presence of stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof. Without further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the process, method, or apparatus that includes said element. In this document, each embodiment may focus on the differences from other embodiments, and similar or identical parts between embodiments can be referred to mutually. For methods, products, etc., disclosed in the embodiments, if they correspond to the method section disclosed in the embodiments, the relevant parts can be referred to the description of the method section.

[0125] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this disclosure. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0126] The methods and products (including but not limited to devices and equipment) disclosed in the embodiments herein can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For instance, the division of units may be merely a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units may be through some interfaces, and the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the units may be selected to implement this embodiment according to actual needs. Furthermore, the functional units in the embodiments of this disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0127] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than that shown in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks may also occur in a different order than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. Each block in a block diagram and / or flowchart, and combinations of blocks in a block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

Claims

1. A protection detection method for a safety cabinet, characterized in that, The safety cabinet includes: a cabinet body with an entrance on the side wall; a fan installed inside the cabinet body and located above the entrance; an operating table installed inside the cabinet body and located below the entrance, with an air inlet on the operating table; and a filter module installed below the operating table. Under the action of the fan, airflow enters the cabinet body through the air inlet, passes through the filter module, forms a return air channel inside the cabinet body, and forms an airflow curtain at the entrance. The protection detection method includes: The air resistance of the airflow curtain passing through the filter module is detected to obtain the air resistance detection value; the air resistance detection value includes the air resistance detection value of the airflow curtain passing through multiple areas of the filter module; wherein, each area has a corresponding air resistance detection value; If the detected wind resistance value is greater than the resistance threshold, the filter module is determined to be faulty. If all the wind resistance detection values ​​are less than the resistance threshold, determine the minimum value among the plurality of wind resistance detection values; The usage status of the filter module is determined based on the resistance deviation values ​​of each resistance detection value other than the minimum value from the minimum value. If any of the wind resistance deviations between the measured wind resistance values ​​and the minimum value exceeds the deviation threshold, then the filter module is determined to be in a partially failed state. The partially failed state refers to an abnormality occurring in a portion of the filter module, causing the airflow curtain at the corresponding location to fail.

2. The protection detection method according to claim 1, characterized in that, The situations where the wind resistance detection value is greater than the resistance threshold include: Multiple wind resistance readings are all greater than the resistance threshold; or, Some of the multiple wind resistance test values ​​are greater than the resistance threshold.

3. The protection detection method according to claim 1 or 2, characterized in that, Also includes: If the wind resistance detection value indicates that the filter module has not completely failed, the interval for protection detection is determined based on the wind resistance detection value. The time after the current time, which is the interval specified from the current time, is taken as the next detection time.

4. The protection detection method according to claim 3, characterized in that, The step of determining the interval duration for protection testing based on the wind resistance detection value includes: The interval for protection detection is determined based on the difference between the resistance threshold and the wind resistance detection value; the detection difference is positively correlated with the current interval.

5. A protective detection device for a safety cabinet, characterized in that, The device includes a processor and a memory storing program instructions, characterized in that the processor is configured to execute, when running the program instructions, the protective detection method for a security cabinet as described in any one of claims 1 to 4.

6. A safety cabinet, characterized in that, include: The cabinet has an entrance on its side wall; The fan is installed inside the cabinet and located above the entrance; An operating table is installed inside the cabinet and located below the entrance; the operating table is equipped with an air inlet. The filter module is located below the control panel; Under the action of the fan, the airflow enters the cabinet through the air inlet, passes through the filter module and forms a return air channel in the cabinet, and forms an airflow curtain at the inlet; The wind resistance detection module is configured to detect the wind resistance of the airflow curtain passing through the filter module; It also includes the protective detection device for the safety cabinet as described in claim 5.

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