Microorganism separation operating platform for microbiological examination

Abstract

The utility model relates to biological separation operation platform technical field especially microorganism separation operation platform for microbiological examination, including the main body that has operation room and gas treatment room in the inside, and operation room and gas treatment room are divided and communicate through mesh plate, the inside of gas treatment room still is provided with the filter element for removing the impurity in air, this microorganism separation operation platform still is provided with controller and is used for detecting the monitoring device of filter element performance, and monitoring device is connected with controller, is used for providing the signal of the filter element performance that can reflect to controller, the output of controller is used for sending control signal, and control signal is used for controlling the operation of siren, and it can realize the performance detection of filter element through setting the monitoring device of the filter element performance, controller and siren on the existing microorganism separation operation platform, and when the performance is poor, can through siren in time the alarm prompt of warning.

Description

Technical Field

[0001] This utility model relates to the field of biological separation operation table technology, and in particular to a microbial separation operation table for microbial testing. Background Technology

[0002] A microbial isolation workbench, also known as a laminar flow hood, is primarily used to provide an ultra-clean working space, preventing contamination when handling microorganisms on culture media. The principle of a modern laminar flow hood is that external air is delivered to the operating chamber via a pneumatic assembly. Before entering the chamber, air undergoes a filtration process to remove impurities. This filtration step is the core of the entire laminar flow hood, typically employing a combination of primary and high-efficiency particulate filters (HEPA filters). HEPA filters, with their extremely small pore size (usually less than 0.3 micrometers), effectively block airborne contaminants such as bacteria, viruses, and particles. The clean air, filtered by the HEPA filters, is then blown into the operating chamber at a controlled and uniform speed, ensuring that the target microorganisms inside the chamber are not contaminated.

[0003] The problem with existing technologies is that the filters in current microbial separation workbenches (clean benches) are often replaced based on usage time (8-12 months). Replacing filters based on usage time cannot guarantee that the high-efficiency filters will maintain optimal performance. This is because some clean benches operate for longer average days, while others operate for shorter average days. Therefore, replacing filters based on usage time is unreliable in ensuring a clean environment. Furthermore, the working environment of each clean bench is inconsistent, and it is impossible to accurately guarantee that the high-efficiency filters are consistently in a high-performance state during long-term operation. Therefore, a microbial separation workbench for microbial testing needs to be designed to address these issues. Utility Model Content

[0004] This invention provides a microbial separation workbench for microbial testing. By adding a filter performance monitoring device, controller, and alarm to the existing microbial separation workbench, it can achieve real-time monitoring of filter performance and promptly alert the user when the filter fails to maintain good performance via an alarm.

[0005] The technical problem solved by this utility model is achieved by the following technical solution:

[0006] This utility model provides a microbial separation operating table for microbial testing, comprising a main body having an operating chamber and a gas processing chamber, which are separated and connected by a perforated plate. The gas processing chamber is further equipped with an airflow power component for conveying outside air through the gas processing chamber to the operating chamber, and a filter for removing impurities from the air. An air inlet communicating with the outside is provided on the side wall of the operating chamber. The microbial separation operating table is also equipped with a controller and a monitoring device for detecting the performance of the filter. The monitoring device is connected to the controller and provides the controller with a signal that reflects the performance of the filter. The output of the controller is used to issue a control signal, which is used to control the operation of an alarm.

[0007] Preferably, the device for monitoring the performance of the filter element includes a leakage monitoring device and / or a blockage monitoring device.

[0008] Preferably, the blockage monitoring device includes multiple wind speed sensors spaced apart on a perforated plate. Each wind speed sensor is connected to the input terminal of the controller to provide wind speed signals to the controller. The controller determines the local blockage status of the filter element based on the difference between the values ​​of the multiple wind speed sensors. When the controller determines that the local blockage of the filter element is severe, it controls the alarm to issue a warning.

[0009] Preferably, the leakage status monitoring device includes an aerosol generator located upstream of the filter element and an aerosol monitoring component located downstream of the filter element. The controller determines the leakage status of the filter element by receiving signals from the aerosol monitoring component. When the leakage of the filter element is relatively serious, the controller controls an alarm to issue a warning.

[0010] Preferably, the aerosol generator includes an air compressor, a venturi tube at the output end of the air compressor, a suction tube whose output end is connected to the throat of the venturi tube, and a solution bottle located below the throat. The input end of the suction tube extends into the interior of the solution bottle, and the output end of the venturi tube points towards the upstream region of the filter element.

[0011] Preferably, the aerosol monitoring component includes a photoelectric generator located downstream of the filter element and a photoelectric receiver disposed opposite to the photoelectric generator. The controller determines whether there is aerosol in the air based on the photoelectric intensity received by the photoelectric receiver, thereby reflecting the leakage status of the filter element.

[0012] Preferably, the aerosol monitoring component further includes an exhaust channel disposed on the side wall of the operating chamber, wherein the input end of the exhaust channel is provided with an electrically controlled valve controlled by a controller, and the photoelectric generator and photoelectric receiver are respectively disposed opposite to each other on the two side walls of the exhaust channel.

[0013] The beneficial effects of this utility model are: by setting up a monitoring device, controller and alarm to reflect the performance of the filter element on the existing microbial separation operation platform, it is possible to detect the performance of the filter element, and when the performance is poor, it can promptly issue an alarm through the alarm.

[0014] By setting the filter element performance monitoring device as a leakage condition monitoring device and / or a clogging condition monitoring device, it is possible to monitor the clogging and leakage conditions of the filter element. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a perspective view of the present invention;

[0018] Figure 3 This is a first sectional view of the present invention;

[0019] Figure 4 This is a second sectional view of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the aerosol generator of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the perforated plate of this utility model;

[0022] Figure 7 This is a circuit diagram for leakage status monitoring according to this utility model;

[0023] Figure 8 This is a circuit diagram for monitoring blockage status according to the present invention.

[0024] In the diagram, 1. Main body; 2. Control room; 3. Opening and closing door; 4. Pneumatic power component; 5. Filter; 6. Gas treatment chamber; 7. Air inlet; 8. Mesh plate; 9. Air compressor; 10. Venturi tube; 1001. Throat section; 11. Suction tube; 12. Solution bottle; 13. Exhaust channel; 14. Photoelectric generator; 15. Photoelectric receiver; 16. Electrically controlled valve; 17. Controller; 18. Alarm; 19. Wind speed sensor. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0026] To enable those skilled in the art to understand the prior art involved in this utility model, reference is first made to... Figures 1-4 The existing microbial separation operating table includes a main body 1 with an operating chamber 2 and a gas treatment chamber 6 inside. The operating chamber 2 is used for personnel to operate on microorganisms. The reason why the operating chamber 2 can maintain a clean working state is that the gas treatment chamber 6 provides clean air into the operating chamber 2. The gas treatment chamber 6 and the operating chamber 2 are connected and separated by a mesh plate 8. The gas treatment chamber 6 has an airflow power component 4 that transfers external air into the operating chamber 2 (generally a negative pressure fan that draws external air into the gas treatment chamber 6 and then exhausts the air into the operating chamber 2). The gas treatment chamber 6 is also equipped with a filter 5 (also called a high-efficiency filter or ultra-high-efficiency filter, which will be referred to as filter 5 below) to filter impurities in the air and ensure air cleanliness. An air inlet 7 is also provided on the side wall of the gas treatment chamber 6 (the upper side wall or top wall in the attached figure) to enable the operating chamber 2 to communicate with the outside atmosphere. Before the operation begins, the interior of the operating chamber 2 is disinfected to ensure a sterile environment (generally achieved by wiping with disinfectant, sealing the door of the operating chamber 2, and then irradiating with ultraviolet light for a specific time). During operation, the airflow mechanism 4 operates, opening the door of the operating chamber 2 (this door is generally adjustable up and down and made of transparent material; moving it upwards opens the door). External air enters the gas treatment chamber 6, is filtered by the filter 5, and then blown into the operating chamber (the wind direction in the attached diagram of the operating chamber 2 is vertical, but in actual products, the wind direction of the operating chamber 2 can also be horizontal). Because the air blown into the operating chamber 2 is clean air (and the interior of the operating chamber 2 is under positive pressure, external air cannot enter the operating chamber 2 through other means, and the positive pressure air can only be discharged through the gap in the door), the environment inside the operating chamber 2 is kept in a clean working state. As described above, the filter element 5 is the core component for maintaining the cleanliness of the operating chamber 2. Its filtration effect directly affects the cleanliness of the separation operating table. In order to enable the monitoring of the performance of the filter element 5 and ensure the cleanliness of the internal environment of the separation operating table, this utility model makes the following improvements to the above solution.

[0027] The main improvement of this utility model is that a controller 17, a monitoring device for detecting the performance of the filter element 5, and an alarm 18 are set up on the microbial separation operating table to monitor the performance of the filter element 5. Specifically, when the performance of the filter element 5 is low, the output end of the monitoring device is connected to the input end of the controller 17 to provide the controller 17 with a signal reflecting the performance of the filter element 5. The output end of the controller 17 is used to issue a control signal, which is used to control the operation of the alarm 18 to provide an alarm reminder to personnel when the performance of the filter element 5 is low.

[0028] Furthermore, the performance monitoring device for the filter element 5 is used to monitor the leakage status and / or blockage status of the filter element 5, specifically including a leakage status monitoring device and / or a blockage status monitoring device.

[0029] Further reference Figure 6 and Figure 8 The blockage monitoring device includes multiple wind speed sensors 19 spaced apart on the perforated plate 8. Each wind speed sensor 19 is connected to the input terminal of the controller 17 to provide wind speed signals to the controller 17. The controller 17 determines the local blockage status of the filter element 5 based on the difference between the values ​​of the multiple wind speed sensors 19. When the controller 17 determines that the local blockage of the filter element 5 is severe, it controls the alarm 18 to issue a warning. Specifically, when the filter element 5 is not locally blocked, the wind speed monitoring values ​​of the multiple wind speed sensors 19 should be consistent. When the filter element 5 is locally blocked, the values ​​of the multiple wind speed sensors 19 will show a difference. When the difference is large, it indicates that the local blockage of the filter element 5 is relatively severe. At this time, the controller 17 controls the alarm 18 to issue an alarm warning.

[0030] Furthermore, the leak monitoring device includes an aerosol generator upstream of the filter element 5 and an aerosol monitoring component downstream of the filter element 5. The controller 17 determines the leak status of the filter element 5 by receiving signals from the aerosol monitoring component. When the leak in the filter element 5 is severe, the controller 17 controls the alarm 18 to issue a warning. Specifically, the higher the aerosol concentration detected by the aerosol monitoring component, the more severe the leak in the filter element 5. When the aerosol monitoring component does not detect any aerosol, it indicates that the filter element 5 has no leak and its filtration performance is good. Preferably, the size of the aerosol particles should be determined according to the type of filter element 5 to be detected. When a high-efficiency filter is used as the filter element 5, the aerosol particle size should be no less than 0.3 micrometers, because the filtration efficiency of high-efficiency filters for particles with a diameter of 0.3 micrometers can usually reach more than 99.97%, which is an internationally recognized basic filtration efficiency indicator for high-efficiency filters. Some high-efficiency filters can achieve a filtration efficiency of about 99.99% for particles of 0.3 microns. When an ultra-high efficiency filter is used as a filter element 5, the aerosol particle size should not be less than 0.1 microns, because for particles of 0.1 microns to 0.2 microns, the ultra-high efficiency filter ULPA can achieve a filtration efficiency of 99.999% to 99.99999%.

[0031] Furthermore, the aerosol generator includes an air compressor, a venturi tube 10 at the output end of the air compressor, a suction tube 11 connected to the throat section 1001 of the venturi tube 10 at its output end, and a solution bottle 12 located below the throat section 1001. The input end of the suction tube 11 extends into the interior of the solution bottle 12, and the output end of the venturi tube 10 points towards the upstream region of the filter element 5. The principle of this aerosol generator is that when compressed air passes through the throat section 1001, the pressure in the throat section 1001 decreases, and the solution inside the solution bottle 12 is forced into the throat section 1001 through the suction tube 11. After the solution mixes with the compressed air, it is impacted and dispersed to form aerosol particles. The liquid can be water or other solutions that will not damage the high-efficiency filter and are harmless to the human body. By adjusting the gas flow rate ejected by the air compressor 9, aerosol particles of different diameters can be achieved; the higher the airflow velocity, the smaller the aerosol particle size.

[0032] Furthermore, the aerosol monitoring component includes a photoelectric generator 14 located downstream of the filter element 5 and a photoelectric receiver 15 positioned opposite to the photoelectric generator 14. The controller 17 determines the presence of aerosols in the air based on the photoelectric intensity received by the photoelectric receiver 15, thereby reflecting the leakage status of the filter element 5. Specifically, its monitoring principle is that when aerosols pass through the photoelectric receiver 15 and the photoelectric generator 14, some of the light is refracted and reflected, causing the photoelectric intensity received by the photoelectric receiver 15 to weaken. The concentration of aerosols is then determined based on the photoelectric intensity. When the aerosol concentration exceeds a set threshold, the alarm 18 is activated under the control of the controller 17. Specifically, the photoelectric generator 14 and the photoelectric receiver 15 are positioned opposite each other on the exhaust channel 13 on the side wall of the operating room 2. During use, the opening and closing of the exhaust channel 13 is achieved through the electrically controlled valve 16 located at the input end of the exhaust channel 13, i.e., reference... Figure 7 When monitoring the leakage status, with the pneumatic power component 4 in operation, the door of the control room 2 is closed. The controller 17 first controls the electric control valve 16 to open. At this time, the airflow inside the control room 2 can only be discharged from the exhaust channel 13. The controller 17 controls the photoelectric generator 14 and the photoelectric receiver 15 to be in working state. When there is aerosol in the air discharged from the exhaust channel 13, it will cause the photoelectric threshold received by the photoelectric receiver 15 to change, thereby indirectly monitoring the leakage performance of the filter 5.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above-described embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A microbial isolation workbench for microbial testing, comprising a main body (1) having an operating chamber (2) and a gas processing chamber (6) inside, wherein the operating chamber (2) and the gas processing chamber (6) are separated and connected by a mesh plate (8), wherein the gas processing chamber (6) is further provided with an airflow power component (4) for conveying external air through the gas processing chamber (6) to the operating chamber (2) and a filter component (5) for removing impurities from the air, wherein an air inlet (7) communicating with the outside is provided on the side wall of the operating chamber (2), characterized in that, The microbial separation workbench is also equipped with a controller (17) and a monitoring device for detecting the performance of the filter element (5). The monitoring device is connected to the controller (17) and is used to provide the controller (17) with a signal that reflects the performance of the filter element (5). The output of the controller (17) is used to send a control signal, which is used to control the operation of the alarm (18).

2. A microbiological isolation station for microbiological testing according to claim 1, characterized in that The monitoring device for the performance of the filter element (5) includes a leakage monitoring device and / or a blockage monitoring device that works in conjunction with the controller.

3. A microbiological isolation station for microbiological testing according to claim 2, characterized in that The blockage monitoring device includes multiple wind speed sensors (19) spaced apart on the perforated plate (8). The multiple wind speed sensors (19) are all connected to the input terminal of the controller (17) to provide wind speed signals to the controller (17). The controller (17) determines the local blockage status of the filter element (5) based on the difference between the multiple wind speed sensors (19). When the controller (17) determines that the local blockage of the filter element (5) is serious, it controls the alarm (18) to issue a warning.

4. The microbiological isolation workstation for microbiological testing according to claim 2, characterized in that The leakage status monitoring device includes an aerosol generator located upstream of the filter element (5) and an aerosol monitoring component located downstream of the filter element (5). The controller (17) determines the leakage status of the filter element (5) by receiving the signal fed back by the aerosol monitoring component. When the leakage of the filter element (5) is relatively serious, the controller (17) controls the alarm (18) to provide a warning.

5. A microbiological isolation station for microbiological testing according to claim 4, characterized in that The aerosol generator includes an air compressor, a venturi tube (10) at the output end of the air compressor, a suction tube (11) whose output end is connected to the throat (1001) of the venturi tube (10), and a solution bottle (12) located below the throat (1001). The input end of the suction tube (11) extends into the interior of the solution bottle (12), and the output end of the venturi tube (10) points to the upstream region of the filter element (5).

6. A microbiological isolation station for microbiological testing according to claim 4, characterized in that The aerosol monitoring component includes a photoelectric generator (14) located downstream of the filter element (5) and a photoelectric receiver (15) disposed opposite to the photoelectric generator (14). The controller (17) determines whether there is aerosol in the air based on the photoelectric intensity received by the photoelectric receiver (15), thereby reflecting the leakage status of the filter element (5).

7. A microbiological isolation station for microbiological testing according to claim 6, characterized in that The aerosol monitoring component also includes an exhaust channel (13) set on the side wall of the operating room (2). The input end of the exhaust channel (13) is provided with an electrically controlled valve (16) controlled by the controller (17). The photoelectric generator (14) and the photoelectric receiver (15) are respectively set on the two side walls of the exhaust channel (13).

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