Laboratory cleaning operation device capable of monitoring particle cleanliness on line

Abstract

The utility model relates to a laboratory clean operation device capable of monitoring particle cleanliness on line. The laboratory clean operation device is provided with a clean working area; a particle cleanliness monitoring mechanism is arranged in the clean working area, the particle cleanliness monitoring mechanism comprises a particle detector and a collecting pipe arranged in the clean working area, and the particle detector is connected and communicated with one end of the collecting pipe and is configured to detect the particle size and concentration of dust particles in the clean working area; the collecting pipe is provided with a plurality of gas capturing openings opposite to the spraying direction of laminar flow gas; and gas treatment equipment is arranged on the outer side of the clean working area and is configured to feed clean laminar gas into the clean working area after the gas is subjected to cleaning treatment. The device can monitor the air cleanliness in the clean working area in real time, whether the specific cleanliness condition in the clean working area meets the requirements of laboratory operation or not can be known in advance during laboratory operation, and samples, operators and the external environment are prevented from being polluted by dust particles.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of air purification auxiliary for laboratory operation, in particular to a laboratory clean operation device capable of monitoring particle cleanliness online. BACKGROUND

[0002] At present, medical and health, biopharmaceutical, food, medical science experiment, optics, electronics, sterile room experiment, sterile microbial test, plant tissue culture inoculation and other laboratory operations require a local clean and sterile particle number controllable working environment, and biological safety cabinet, super clean bench and sterile isolator and the like provide such functions. Among them, the biological safety cabinet (biological safety cabinet, BSC) is a box-type air purification biological safety device capable of preventing some biological particles containing dangerous or unknown biological particles from being dispersed in the form of aerosol during experimental operation and processing. According to the safety level of the biological safety cabinet, the biological safety cabinet can protect the sample and the operator during the operation process, the personnel, the product and the environment during the operation process of the operator.

[0003] The super clean bench is a one-way flow type air purification equipment providing a local dust-free and sterile working environment, which sends filtered air in the form of vertical or horizontal air flow through a filter, so that the operation area reaches the hundred-level cleanliness, and ensures the requirement of the environment cleanliness for production.

[0004] In the prior art, the laboratory clean operation device such as the biological safety cabinet and the super clean bench lacks effective air cleanliness online monitoring measures. At present, the monitoring of air cleanliness needs to be carried out regularly by manual, which detects the clean working area of the laboratory clean operation device through manual particle counter detection, microbial detector and surface cleanliness detection. However, since the air cleanliness in the laboratory clean operation device such as the biological safety cabinet and the super clean bench cannot be monitored in real time, the operator is easily exposed to a large particle pollution and biological safety risk, and the laboratory product and environment cannot be ensured to be well maintained. In the prior art, CN118874560A provides a biological safety cabinet for biological monitoring, which starts the motor through the controller, and simultaneously controls the hydraulic cylinder to push the mounting plate forward through the controller, so as to accurately open the barrier, thereby improving the height error problem caused by manual operation of the barrier. However, the problem of air cleanliness online monitoring in the prior art is not solved. The present application is therefore derived. SUMMARY

[0005] The laboratory clean operation device with online monitoring of particle cleanliness provided by the embodiments of the present application can monitor the air cleanliness in the laboratory clean operation device in real time, so that the operator can be prevented from facing a high risk of particle pollution, and the laboratory product and the environment can be protected in high quality, and the performance and reliability of the product can be prevented from being affected.

[0006] In a first aspect, the embodiments of the present application provide a laboratory clean operation device with online monitoring of particle cleanliness, which is provided with a clean work area;

[0007] The clean work area is provided with a particle cleanliness monitoring mechanism, which includes a particle detector and a collection tube arranged in the clean work area, the particle detector is connected and communicated with one end of the collection tube, and is configured to detect the particle size and concentration of dust particles in the clean work area; the collection tube is provided with a plurality of gas capture openings opposite to the injection direction of the laminar flow gas;

[0008] The clean work area is provided with a gas treatment device outside the clean work area, which is configured to send the clean laminar flow gas into the clean work area after the clean treatment of the gas.

[0009] In some possible embodiments, the clean work area includes a plurality of clean sub-areas arranged along a first direction, the plurality of clean sub-areas are arranged in a matrix in the first direction, and the collection tube is provided with at least one gas capture opening in each clean sub-area.

[0010] In some possible embodiments, the gas capture opening is communicated with a gas suction opening of the particle detector; the gas capture opening is a through hole penetrating through the collection tube, the through hole has a first inner diameter located on the outer wall surface of the collection tube and a second inner diameter located on the inner wall surface of the collection tube; the second inner diameter is greater than the first inner diameter.

[0011] In some possible embodiments, the first direction is perpendicular to the injection direction of the laminar flow gas.

[0012] In some possible embodiments, the collection tube is a straight tube arranged along the first direction; the collection tube is provided with a first gas capture opening and a second gas capture opening along the first direction, the first gas capture opening is located on the side of the second gas capture opening close to the particle detector, and the first inner diameter of the second gas capture opening is greater than the first inner diameter of the first gas capture opening.

[0013] In some possible embodiments, the clean work area includes a hollow work box body, a shell is arranged outside the work box body, and a gas treatment channel is arranged between the work box body and the shell.

[0014] In some possible embodiments, the working cabinet is provided with an operation door facing the operator, a laminar flow plate at the upper end of the working cabinet for guiding laminar flow gas into the working cabinet, and a workbench separated from the gas treatment channel at the lower end of the working cabinet, and the outer periphery of the workbench is provided with a plurality of gas guide holes in communication with the gas treatment channel.

[0015] In some possible embodiments, the inner wall of the working cabinet is provided with a bacteriostatic coating. The inner wall of the working cabinet is further provided with gas guide holes at the lower end, which are arranged annularly around the workbench.

[0016] In some possible embodiments, the array of gas guide holes is arranged in the clean work area, and the array is arranged around the workbench.

[0017] In some possible embodiments, the gas guide holes are selected from one or more of strip-shaped holes, round holes, long holes, oval holes, and waist-shaped holes.

[0018] In some possible embodiments, the gas treatment device comprises a wind collecting cabinet arranged at the upper end of the working cabinet, the wind collecting cabinet is provided with a first air outlet with a primary filter and a second air outlet with a high-efficiency filter, the wind collecting cabinet is in communication with the external environment through the first air outlet; the wind collecting cabinet is in communication with the clean work area through the second air outlet.

[0019] In some possible embodiments, the wind collecting cabinet is provided with an air inlet in communication with the gas treatment channel.

[0020] In some possible embodiments, the gas treatment channel comprises a side air outlet cavity arranged outside the inner wall of the working cabinet, a rear air outlet cavity arranged at the rear side of the inner wall of the working cabinet, and a lower air outlet cavity arranged at the lower end of the working cabinet, the gas collected in the side air outlet cavity, the rear air outlet cavity, and the lower air outlet cavity enters the wind collecting cabinet through the air inlet after passing through the filter screen plate arranged in the gas treatment channel.

[0021] In some possible embodiments, the cross section of the collecting pipe is elliptical, and the major axis direction of the elliptical shape is the same as the injection direction of the laminar flow gas.

[0022] In some possible embodiments, when the injection flow rate of the laminar flow gas is controlled at 0.3-0.36 m / s, the eccentricity of the elliptical shape is set at 0.5-0.7.

[0023] In some possible embodiments, the collecting pipe comprises an annular pipe arranged at the upper end of the clean work area, the annular pipe passes through each clean sub-area in the clean work area, and one gas capturing port opposite to the injection direction of the laminar flow gas is arranged at each clean sub-area.

[0024] In some possible embodiments, the annular tube has its upper end plane in the first direction constituting a first plane parallel to the laminar flow plate of the clean work area, and the distance between the first plane and the laminar flow plate of the clean work area is controlled within a range of 10-30 cm.

[0025] In some possible embodiments, the device is selected from one of a biological safety cabinet, an ultra-clean workbench, and a biological isolator.

[0026] The second aspect of the present application provides a biological safety cabinet capable of monitoring particle cleanliness on line, which is provided with a clean work area.

[0027] The clean work area is provided with a particle cleanliness monitoring mechanism, which comprises a particle detector and a collection tube arranged in the clean work area.

[0028] The clean work area is provided with a gas treatment device outside the clean work area, which is configured to send clean laminar flow gas into the clean work area after clean treatment of the gas.

[0029] The third aspect of the present application provides an ultra-clean workbench capable of monitoring particle cleanliness on line, which is provided with a clean work area.

[0030] The clean work area is provided with a particle cleanliness monitoring mechanism, which comprises a particle detector and a collection tube arranged in the clean work area.

[0031] The clean work area is provided with a gas treatment device outside the clean work area, which is configured to send clean laminar flow gas into the clean work area after clean treatment of the gas.

[0032] The fourth aspect of the present application provides a sterile isolator capable of monitoring particle cleanliness on line, which is provided with a clean work area.

[0033] The clean work area is provided with a particle cleanliness monitoring mechanism, the particle cleanliness monitoring mechanism comprises a particle detector and a collection pipe arranged in the clean work area, the particle detector is connected in communication with one end of the collection pipe and is configured to detect the particle size and concentration of dust particles in the clean work area; the collection pipe is provided with a plurality of gas capture openings opposite to the injection direction of the laminar flow gas;

[0034] The clean work area is provided with a gas treatment device, which is configured to send clean laminar flow gas into the clean work area after clean treatment of the gas.

[0035] The present application realizes online real-time monitoring of air cleanliness in the clean work area by arranging a particle cleanliness monitoring mechanism in the clean work area. Through the design of the particle cleanliness monitoring mechanism, a plurality of gas capture openings opposite to the injection direction of the laminar flow gas are arranged at multiple positions in the clean work area. The air in the corresponding position area is collected through the gas capture openings, so that the overall air cleanliness in the clean work area can be monitored and judged. When the overall air cleanliness exceeds the preset threshold, the alarm device integrated in the device alarms to prompt the operator. Due to the arrangement of the particle cleanliness monitoring mechanism, the air cleanliness in the clean work area can be monitored in real time, and the specific cleanliness condition in the clean work area can be known in advance during laboratory operation to meet the needs of laboratory operation, so as to avoid the harm of particle pollution to the sample, the operator and the external environment. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments of the present application will be briefly introduced. Those skilled in the art can obtain other drawings according to these drawings without creating creative labor.

[0037] Figure 1 The structure schematic diagram of the laboratory clean operation device provided by the embodiments of the present application is shown in the figure;

[0038] Figure 2 Another structure schematic diagram of the laboratory clean operation device provided by the embodiments of the present application is shown in the figure;

[0039] Figure 3 Another structure schematic diagram of the laboratory clean operation device provided by the embodiments of the present application is shown in the figure;

[0040] Figure 4 Another structure schematic diagram of the laboratory clean operation device provided by the embodiments of the present application is shown in the figure;

[0041] Figure 5 The structure schematic diagram of the laboratory clean operation device provided by the embodiments of the present application is shown in the figure;

[0042] Figure 6 Another structural schematic diagram of the opened clean operation device housing provided by the embodiment of the present application.

[0043] Figure 7 Another structural schematic diagram of the clean operation device provided by the embodiment of the present application.

[0044] Figure 8 A structural schematic diagram of the collection tube provided by the embodiment of the present application.

[0045] Figure 9 Another structural schematic diagram of the collection tube provided by the embodiment of the present application.

[0046] Figure 10 A cross-sectional structural schematic diagram of the opening part and non-opening part of the collection tube provided by the embodiment of the present application.

[0047] Figure 11 A principle block diagram of the control device of the clean operation device of the present application.

[0048] In the figure: 1-clean work area;

[0049] 11-air inlet; 12-clean partition; 13-air collecting box body; 14-first air outlet; 15-second air outlet; 16-work box body; 17-housing; 18-laminar flow plate; 19-filter screen plate;

[0050] 101-workbench; 102-gas flow guide hole;

[0051] 21-particle detector; 22-collection tube; 23-gas capturing port; 231-first gas capturing port; 232-second gas capturing port; 233-first coating layer; 234-second coating layer. DETAILED DESCRIPTION

[0052] The features and exemplary embodiments of various aspects of the present application will be described in detail below, in order to make the purposes, technical solutions and advantages of the present application more clear and apparent, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, but not to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0053] It should be understood that, in the description of the present application and claims, if there are terms "first", "second", etc., they are only used to distinguish the described objects, and do not have any order or technical meaning. Therefore, the objects defined with "first", "second", etc. can be explicitly or implicitly included one or more of the objects. And "one" or "an" and the like similar words do not represent a quantity limit, but represent the existence of at least one, and "more" represents no less than two.

[0054] In the description of the present application and claims, if there are terms "up", "down", "horizontal", etc. indicating the orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of clearly and simply describing the present application, and does not indicate or imply that the elements referred to must have a particular direction, be constructed and operated in a particular orientation, these directional terms are relative concepts, used for relative description and clarification, and can be changed accordingly according to the change of the orientation of the components placed in the drawings. For example, if the device in the figure is turned over, the element described as "below" other elements will be positioned "above" the other elements.

[0055] In the prior art, laboratory clean operation devices such as biological safety cabinets and super-clean benches currently only detect the air speed of the fan, and do not detect the cleanliness. The cleanliness of the operation area of the biological safety cabinet is a key parameter to ensure that the sample is not contaminated. Some biological safety cabinets have damaged high-efficiency filters, and due to the lack of real-time detection of cleanliness, the sample is contaminated and the experiment fails. The existing biological safety cabinet does not have an operation area cleanliness detection function, and the user does not know that the high-efficiency filter is damaged, causing the operation area to fail to reach Class 5 cleanliness, resulting in the sample being contaminated and the experiment failing.

[0056] As shown in Figure 1 The present embodiment provides a laboratory clean operation device capable of monitoring the cleanliness of particles online, which is provided with a clean work area 1; a particle cleanliness monitoring mechanism 2 is arranged in the clean work area 1, the particle cleanliness monitoring mechanism 2 comprises a particle detector 21 and a collection tube 22 arranged in the clean work area 1, the particle detector 21 is connected and communicated with one end of the collection tube 22, and is configured to detect the particle size and concentration of dust particles in the clean work area 1; the collection tube 22 is provided with a plurality of gas capture openings 23 opposite the injection direction of the laminar flow gas; a gas treatment device is arranged outside the clean work area 1, and the gas treatment device is configured to send the clean laminar flow gas into the clean work area 1 after clean treatment of the gas. The device can monitor the air cleanliness in the clean work area 1 in real time through the cooperation of the particle detector 21 and the collection tube 22.

[0057] In the specific embodiment of the present application, the clean work area 1 is uniformly divided. The clean work area 1 comprises a plurality of clean sub-areas 12 arranged along a first direction, the plurality of clean sub-areas 12 are arranged in a matrix in the first direction, and the collection pipe 22 is provided with at least one gas capture port 23 in each clean sub-area 12. The matrix division of the clean sub-areas 12 in the clean work area 1, and the provision of the gas capture port 23 in each clean sub-area 12 facilitate the multi-point detection of air cleanliness at different positions, which can reduce the dependence of the detection data of one gas capture port 23, and avoid the misjudgment of the air cleanliness in the whole clean work area 1. Moreover, the plurality of gas capture ports 23 collect gas at the same time, and the detection result is more stable and objective. If a clean sub-area 12 has a problem, it is considered that the whole clean work area 1 does not meet the requirement of air cleanliness.

[0058] In the technical solution of the present application, the gas capture port 23 is in communication with the air outlet of the particle detector 21; the gas capture port 23 is a through hole penetrating through the collection pipe 22, the through hole has a first inner diameter D1 located on the outer wall surface of the collection pipe 22 and a second inner diameter D2 located on the inner wall surface of the collection pipe 22; the second inner diameter D2 is greater than the first inner diameter D1. In the present application, the second inner diameter D2 is greater than the first inner diameter D1, so that the gas captured by the gas capture port 23 is collected by the particle detector 21, avoiding the generation of turbulent flow of laminar gas at the gas capture port 23, and avoiding the adverse effect on the distribution of gas flow in the clean work area 1.

[0059] It should be noted that the length direction of the clean work area 1 is the first direction DR1, the injection direction of the laminar gas is the second direction DR2, and the width direction of the clean work area 1 is the third direction DR3, which is the normal direction of the plane defined by the first direction DR1 and the second direction DR2, i.e. the width direction of the clean work area 1. The first to third directions DR1, DR2 and DR3 described in the present specification indicate the relative concept and can be changed to other directions. In the technical solution of the present application, it is agreed that the first direction is perpendicular to the injection direction of the laminar gas.

[0060] In the technical scheme of the present application, the collecting pipe 22 is a straight pipe arranged along the first direction; the collecting pipe 22 is provided with a first gas capturing opening 231 and a second gas capturing opening 232 along the first direction, the first gas capturing opening 231 is located on the side of the second gas capturing opening 232 close to the particle detector 21, and the first inner diameter D1 of the second gas capturing opening 232 is greater than the first inner diameter D1 of the first gas capturing opening 231. The first inner diameter D1 of the gas capturing opening 23 is designed according to the distance of the gas capturing opening 23 from the suction opening of the particle detector 21, and the first inner diameter D1 of the gas capturing opening 23 closer to the particle detector 21 is smaller, so that the gas volume of each gas capturing opening 23 entering the suction opening of the particle detector 21 is approximately equivalent, avoiding the interference caused by the different gas volumes between the gas capturing openings 23 when the particle detector 21 detects.

[0061] In the technical scheme of the present application, the clean work area 1 comprises a hollow work box 16, a shell 17 is arranged outside the work box 16, and a gas treatment channel is arranged between the work box 16 and the shell 17. The work box 16 separates the gas treatment channel and the clean work area 1, and the gas treatment channel outside the work box 16 is used for negative pressure gas treatment. According to different safety levels, part of the air is filtered and treated by the gas treatment channel and then recycled into the clean work area 1, and another part of the air is filtered and treated by the gas treatment channel and then discharged.

[0062] In the technical scheme of the present application, the work box 16 is provided with an operation door facing the operator, a laminar flow plate 18 is arranged at the upper end of the work box 16 to guide laminar flow gas into the work box 16, a workbench 101 is arranged at the lower end of the work box 16 and separated from the gas treatment channel, and a plurality of gas guide holes 102 are arranged on the outer periphery of the workbench 101 and communicated with the gas treatment channel. The work box 16 introduces vertical laminar flow gas into the clean work area 1 through the upper end laminar flow plate 18, and the vertical laminar flow gas blows on the workbench 101 to carry away biological hazards such as particles and microorganisms from the gas guide holes 102.

[0063] The inner wall of the working box 16 is provided with a bacteriostatic coating. The lower end of the inner wall of the working box 16 is further provided with a gas flow guide hole 102, and the gas flow guide hole 102 is arranged in a ring around the workbench 101. In the technical scheme of the present application, the gas flow guide hole 102 is arranged in an array in the clean work area 1, and the array is arranged around the workbench 101. In the technical scheme of the present application, the gas flow guide hole 102 is a strip-shaped hole. The ring-shaped arrangement of the gas flow guide hole 102 can form a lower air outlet cavity under the workbench 101, form a side air outlet cavity on both sides of the working box 16, and form a rear air outlet cavity on the outer side of the rear wall of the working box 16, which facilitates the gas treatment equipment to suck gas in the lower air outlet cavity, the rear air outlet cavity, and the lower air outlet cavity for gas treatment.

[0064] In the technical scheme of the present application, the gas treatment equipment includes a wind collecting box 13 arranged at the upper end of the working box 16, the wind collecting box 13 is provided with a first air outlet 14 with a primary filter and a second air outlet 15 with a high-efficiency filter, the wind collecting box 13 is in communication with the external environment through the first air outlet 14; the wind collecting box 13 is in communication with the clean work area 1 through the second air outlet 15. The gas treatment equipment of the present application can suck the gas in the gas treatment channel outwards through the first air outlet 14, so that the cabinet maintains a negative pressure state, and the vertical airflow is used to protect the workers; the external air is filtered by the high-efficiency filter and then enters the clean work area 1, so as to avoid the sample from being contaminated; the air in the clean work area 1 also needs to be filtered by the primary filter before being discharged into the atmosphere, so as to protect the environment. Both the primary filter and the high-efficiency filter can adopt a high-efficiency air filter (HEPA filter) product.

[0065] In the technical scheme, the air collecting box 13 is provided with an air inlet 11 communicated with the gas treatment channel. In the technical scheme, the gas treatment channel comprises a side air outlet cavity arranged outside the inner wall of the working box 16, a rear air outlet cavity arranged at the rear side of the inner wall of the working box 16 and a lower air outlet cavity arranged at the lower end of the working box 16. The gas collected in the side air outlet cavity, the rear air outlet cavity and the lower air outlet cavity enters the air collecting box 13 through the air inlet 11 after passing through the filter screen plate 19 arranged in the gas treatment channel. Because the suction is continuously carried out in the gas treatment channel, the filter screen plate 19 can block the large objects and prevent the large objects from entering the air collecting box 13. One end of the filter screen plate 19 is fixed to the shell 17 and the other end is fixed to the rear wall of the working box 16. The height of the end of the filter screen plate 19 fixed to the rear wall of the working box 16 is higher than the height of the gas flow guide hole 102. The height of the end of the filter screen plate 19 fixed to the shell 17 is lower than the height of the gas flow guide hole 102. In this way, the objects such as paper and cotton cloth can be effectively prevented from entering the air collecting box 13.

[0066] In the technical scheme, the cross section of the collecting pipe 22 is elliptical, and the long axis direction of the elliptical shape is the same as the injection direction of the laminar flow gas. In the technical scheme, when the injection flow rate of the laminar flow gas is controlled to be 0.3-0.36 m / s, the eccentricity of the elliptical shape is set to be 0.5-0.7. Figure 10 As shown in the figure, the outer wall of the collecting pipe 22 is provided with a first coating layer 233 and the inner wall is provided with a second coating layer 234. In this way, the collecting pipe can be placed in the clean working area for a long time. The collecting pipe 22 can be two stainless steel pipes or plastic pipes with smooth surfaces. A gas capture opening 23 is arranged in the middle of each partition as a sampling hole. The gas captured by the gas capture opening 23 is collected together and then sucked into the suction port of the particle detector 21 by the air pump for counting. If the clean level is not reached, a light alarm is sent. The typical particle detector 21 can be a laser particle counting sensor. The distance between the sampling opening and the total suction port on the smooth stainless steel pipe or other hard pipes with openings is different, and the flow rate is adjusted by the size of the opening to make the suction flow rate of each hole the same.

[0067] In the technical scheme, the collecting pipe 22 comprises an annular pipe arranged at the upper end of the clean working area 1. The annular pipe passes through each clean partition 12 in the clean working area 1 and is provided with a gas capture opening 23 opposite to the injection direction of the laminar flow gas in each clean partition 12. In the technical scheme, the biological safety cabinet operation area is sampled at multiple points at the same time, and the air pump is used to suck the gas into the laser particle counting sensor for counting. If the clean level is not reached, a light alarm is sent to remind the user that the clean level of the biological safety cabinet operation area does not meet the experimental requirements and the experiment needs to be stopped.

[0068] In the technical solution of the present application, the upper end plane of the annular pipe in the first direction forms a first plane parallel to the laminar flow plate 18 of the clean work area 1, and the distance between the first plane and the laminar flow plate 18 of the clean work area 1 is controlled within the range of 2-10 cm. Above the clean work area 1, a plane 20 mm below the downstream diffusion net of the high efficiency filter is partitioned into rows and columns not greater than 250 mm, and a sampling port is installed at the center position of each clean partition 12 to sample air.

[0069] When the technical solution of the present application is applied, the device can be applied to a biological safety cabinet, an ultra-clean workbench, and a biological isolator. Figure 11 As shown in the figure, it is a principle block diagram of the control device of the device of the present application. The control device can be an electronic device, such as a personal computer (PC), a server device, a mobile device, and an embedded device, etc. Such an electronic device models according to the information provided by other components in the system. The electronic device can include a processor, a RAM, a memory, a sensor, and a communication module. It can also include an input / output module, a security module, a power control device, etc. The processor can control the overall operation of the electronic device. The processor can include one processor core (single core) or multiple processor cores (multi-core). The processor can process or execute programs and / or data stored in the memory. The processor can be implemented as a CPU, a GPU, an APU, etc.

[0070] The memory can include a random access memory (RAM) (such as a dynamic random access memory (DRAM) and a static random access memory (SRAM)), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM, a Blu-ray or another optical disk storage device, a hard disk drive (HDD), a solid state drive (SSD), or a flash memory. The device can analyze input data in real time based on the system to extract valid information, and implement a fully automated fruit quality evaluation modeling based on the extracted information. The memory is a storage location for storing data, and can store an operating system (OS), various programs, and various data.

[0071] The particle detector 21 can detect the gas cleanliness information in the clean work area; other sensors can collect peripheral information on which the electronic device is installed. The sensor can sense or receive a signal (for example, a temperature signal, a humidity signal, a video signal, an audio signal, a magnetic signal, a biological signal, a touch signal, etc.) from the outside of the electronic device, and convert the sensed or received signal into data. For example, the sensor can include at least one of various types of sensing devices (such as a microphone, an imaging device, an image sensor, a light detection and ranging (LIDAR) sensor, an ultrasonic sensor, an infrared sensor, a biological sensor, and a touch sensor).

[0072] The communication module can be provided with various wired or wireless interfaces capable of communicating with external devices. For example, the communication module can include a communication interface capable of accessing a wired local area network (LAN), a wireless local area network (WLAN) (such as wireless fidelity (Wi-Fi)), a wireless personal area network (WPAN) (such as Bluetooth), a wireless universal serial bus (wireless USB), Zigbee, near field communication (NFC), radio frequency identification (RFID), power line communication (PLC), or a mobile cellular network (such as third generation (3G), fourth generation (4G), and long term evolution (LTE)).

[0073] In this embodiment, the prompting module can be an LED indicator, a buzzer, and a voice prompting unit, capable of sending particle detection information or information of the cleanliness detection result to the user. When the cleanliness detection result exceeds the preset threshold value, the prompting module sends corresponding prompt signals through the LED indicator and the buzzer, ensuring that the user can timely understand the state. Of course, the prompting module displays the working state of the current other components, including the working voltage, the working frequency, and the current limit value. It can be understood that this air cleanliness real-time monitoring and prompting function not only improves the operation convenience of the user, but also enhances the reliability of the system.

[0074] The device described above can be used for real-time monitoring of the air cleanliness of the clean working area 1 in a biological safety cabinet, an ultraclean bench, and a biological isolator. The specific real-time monitoring method includes the following steps:

[0075] (S1) Aspirate the sample according to the preset frequency, open the suction pump, and aspirate the gas from each gas capture port 23;

[0076] (S2) Collect the gas within the preset time, and detect the dust particles in the gas through the particle detector 21;

[0077] (S3) When the particle size of the dust particles exceeds the preset value or the number of the dust particles exceeds the preset value, the processor notifies the alarm device to alarm and prompts the user with specific alarm information; otherwise, the user is prompted with the particle size of the dust particles and the number of the dust particles;

[0078] (S4) Cycle detection and prompt as in steps (S1) to (S3).

[0079] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment.

[0080] In addition, the various functional units in the embodiments of the present application can be integrated in one processing unit, or each can exist physically as a separate unit, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0081] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they shall be considered within the scope of the present disclosure.

Claims

1. A laboratory clean bench capable of monitoring the cleanliness of particles on line, characterized in that, The clean work area is provided; The clean work area is provided with a particle cleanliness monitoring mechanism, which includes a particle detector and a collection tube arranged in the clean work area, the particle detector is connected and communicated with one end of the collection tube, and is configured to detect the particle size and concentration of dust particles in the clean work area; the collection tube is provided with a plurality of gas capture openings opposite to the injection direction of the laminar flow gas; The clean work area is provided with a gas treatment device, which is configured to send clean laminar flow gas into the clean work area after clean treatment of the gas.

2. The laboratory clean operation device capable of monitoring particle cleanliness online according to claim 1, wherein The clean work area includes a plurality of clean partitions arranged along a first direction, and the plurality of clean partitions are arranged in a matrix in the first direction, and the collection tube is provided with at least one gas capture opening in each clean partition; The gas capture opening is communicated with the gas suction port of the particle detector; the gas capture opening is a through hole penetrating through the collection tube, and the through hole has a first inner diameter located on the outer wall surface of the collection tube and a second inner diameter located on the inner wall surface of the collection tube; the second inner diameter is greater than the first inner diameter; The first direction is perpendicular to the injection direction of the laminar flow gas.

3. The laboratory clean bench with on-line monitoring of particle cleanliness according to claim 2, wherein, The collection tube is a straight tube arranged along the first direction; the collection tube is provided with a first gas capture opening and a second gas capture opening along the first direction, the first gas capture opening is located on the side of the second gas capture opening close to the particle detector, and the first inner diameter of the second gas capture opening is greater than the first inner diameter of the first gas capture opening.

4. The laboratory clean operation device capable of monitoring particle cleanliness online according to claim 3, wherein The clean work area includes a hollow work box, and a shell is arranged outside the work box, and a gas treatment channel is arranged between the work box and the shell.

5. The laboratory clean operation device capable of monitoring particle cleanliness online according to claim 4, wherein The work box is provided with an operation door facing the operator, a laminar flow plate is arranged on the upper end of the work box to guide the laminar flow gas into the work box, a workbench is arranged on the lower end of the work box and separated from the gas treatment channel, and a plurality of gas guide holes are arranged on the outer periphery of the workbench and communicated with the gas treatment channel; A gas guide hole is further arranged on the inner wall of the work box at the lower end, and the gas guide hole is arranged annularly along the workbench; The array of gas guide holes is arranged in the clean work area, and is arranged around the workbench; The gas guide hole is selected from one or more of a strip-shaped hole, a circular hole, an elongated hole, an oval hole, and a waist-shaped hole.

6. The laboratory clean operation device capable of monitoring particle cleanliness online according to claim 5, wherein The gas treatment device comprises a wind collecting box arranged at the upper end of the working box, the wind collecting box is provided with a first air outlet provided with a primary filter and a second air outlet provided with a high-efficiency filter, the wind collecting box is communicated with the outside environment through the first air outlet; the wind collecting box is communicated with the clean working area through the second air outlet. The wind collecting box is provided with an air inlet communicated with the gas treatment channel.

7. The laboratory clean operating device capable of monitoring particle cleanliness on line according to claim 6, characterized in that, The gas treatment channel comprises a side air outlet cavity arranged outside the inner wall of the working box, a rear air outlet cavity arranged at the rear side of the inner wall of the working box and a lower air outlet cavity arranged at the lower end of the working box, the gas collected in the side air outlet cavity, the rear air outlet cavity and the lower air outlet cavity enters the wind collecting box through the air inlet after passing through the filter screen plate arranged in the gas treatment channel.

8. The laboratory clean operating device capable of monitoring particle cleanliness on line according to claim 3, characterized in that, The cross section of the collecting pipe is elliptical, the long axis direction of the elliptical shape is the same as the injection direction of the laminar flow gas; When the injection flow rate of the laminar flow gas is controlled at 0.30-0.36 m / s, the eccentricity of the elliptical shape is arranged at 0.5-0.

7.

9. The laboratory clean operating device capable of monitoring particle cleanliness on line according to claim 3, characterized in that, The collecting pipe comprises a ring-shaped pipe arranged at the upper end of the clean working area, the ring-shaped pipe passes through each clean partition in the clean working area and is provided with one gas capturing port opposite to the injection direction of the laminar flow gas in each clean partition; The upper end plane of the ring-shaped pipe in the first direction constitutes a first plane parallel to the laminar flow plate of the clean working area, the distance between the first plane and the laminar flow plate of the clean working area is controlled within the range of 2-10 cm.

10. The laboratory clean operating device capable of monitoring particle cleanliness on line according to claim 3, characterized in that, The device is selected from one of a biological safety cabinet, an ultra-clean workbench and a biological isolator.

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