A prevention and control method and device for cross-infection among the tested population at a nucleic acid testing sampling site

Abstract

The present invention provides a prevention and control method and device for cross-infection of the tested population at nucleic acid testing sampling points. The technical concept of the present invention is to aspirate the exhaled gas of the tested person through a filter membrane for filtration, so that pathogens adhere to the surface or pores of the filter membrane, and then let the filter membrane circulate and turn into the disinfection chamber, where the disinfection device inactivates the pathogens, and the filter membrane is reused; the forehead of the tested person is positioned by the sensor assembly and the isolation cloth at intervals, and information such as the body temperature and head image of the tested person is collected. When the tested person leaves, the isolation cloth and the filter membrane move into the disinfection chamber for disinfection. The isolation cloth is located between the sensor assembly and the tested person to avoid contact infection; when the tested person is sampled, the air deflector and the swing sealing plate narrow the gaps between the isolation cloth and the filter membrane entering and leaving the disinfection chamber, improving the airtightness of the disinfection chamber. The present invention avoids the problems of large volume of disinfection equipment and high disinfection energy consumption caused by the complete disinfection of the exhaled gas of the tested person, and has the advantages of good disinfection effect and high sampling efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of environmental hygiene, and particularly relates to a method and device for preventing and controlling cross-infection of the tested population at a nucleic acid detection sampling point in the technical field of respiratory nucleic acid detection equipment. Background Art

[0002] As one of the important screening means, the collection of pharyngeal swab nucleic acid specimens has the advantages of being simple and easy to perform. When conducting nucleic acid tests on all residents, community workers and volunteers are responsible for pre-collection personnel information entry, guiding personnel grouping, arranging sampling in different time periods, and pre-site layout. Sampling personnel are responsible for nucleic acid specimen collection, specimen preservation and submission for inspection, etc., all of which have clear standards and specifications. Regarding the protective measures for the tested persons, there are various standard requirements such as "keeping a distance of more than 1 meter", "avoiding conversation", and "wearing masks properly". However, when the tested person is taking a "pharyngeal / nasal swab" sample, they must remove the mask, and the mouth and nose are exposed to the atmospheric environment mixed with the exhaled gas of the previous tested person in front, which will pose a possible risk of cross-infection.

[0003] In the existing protective technical solutions, there is almost no protective solution for the tested person during "pharyngeal / nasal swab" sampling. Therefore, it is urgent to develop relevant technologies and equipment to prevent and control cross-infection and control the spread of the epidemic. Summary of the Invention

[0004] In order to solve the problem that the exhaled gas of the previous tested person is cross-infected to the medical staff and the subsequent tested persons during the collection of "nasal swab" or "pharyngeal swab" samples in the nucleic acid detection process, the present invention provides a method and device for preventing and controlling cross-infection of the tested population at a nucleic acid detection sampling point. The technical concept of the present invention is to filter the exhaled gas of the tested person through a filter membrane by suction, so that pathogens adhere to the surface or pores of the filter membrane, and then let the filter membrane circulate and rotate. While rotating, the pathogens are inactivated by a disinfection device, and the filter membrane is reused. This solves the problems faced by directly disinfecting the exhaled gas of the tested person, such as the long residence time for disinfecting the exhaled gas, the large volume of the gas to be disinfected inhaled by the disinfection device, and the high energy consumption. By changing the disinfection of the exhaled gas to the disinfection of the filter membrane, the volume and quantity of the disinfection object are greatly reduced. The filter membrane can rotate slowly in a cycle, and there is no need to purify the filtered gas when disinfecting the filter membrane, which is safe and reliable, and there is no need to store the filtered gas. The disinfection device required for disinfecting the filter membrane is simple, and only ultraviolet irradiation, formaldehyde immersion or high-temperature disinfection is required.

[0005] One technical solution of the present invention is: a method for preventing and controlling cross-infection of the tested population at a nucleic acid detection sampling point, the steps of which include,

[0006] The sensor assembly collects the following feedback signals through a rectangular induction window above the detection channel: when the forehead of the subject approaches the induction window, the approach signal generated by the sensor assembly; when the forehead of the subject leaves the induction window, the departure signal generated by the sensor assembly.

[0007] According to the approach signal, drive the suction and exhaust fan to increase the suction flow rate. After the gas exhaled by the subject into the detection channel is filtered by the filter membrane to remove pathogens, it is then discharged through the suction pipe and the suction and exhaust fan; according to the departure signal, drive the suction and exhaust fan to delay the reduction of the suction flow rate, and at the same time, the filter membrane roller mechanism drives the filter membrane (24) that shields the inlet of the suction pipe during the current nucleic acid detection sampling to move into the disinfection chamber to disinfect the pathogens intercepted by the filter membrane.

[0008] According to the departure signal, the isolation cloth roller mechanism drives the isolation cloth that shields the sensor assembly during the current nucleic acid detection to move into the disinfection chamber to disinfect the pathogens transmitted from the surface of the subject to the surface of the isolation cloth.

[0009] According to the approach signal, drive the disinfection chamber exhaust fan to increase the suction flow rate, increase the negative pressure difference between the disinfection chamber and the detection channel, and prevent the gas in the disinfection chamber from flowing into the detection channel. According to the departure signal, drive the disinfection chamber exhaust fan to delay the reduction of the suction flow rate.

[0010] According to the approach signal, drive the symmetrically arranged windshields through the windshield swing device to press the filter membrane tightly from the left and right sides of the inlet of the suction pipe. At the same time, drive the symmetrically arranged swing sealing plates through the guard plate swing device to press the isolation cloth tightly from the left and right sides of the induction window, reducing the gap from the detection channel to the disinfection chamber; and according to the departure signal, drive the windshields and the swing sealing plates to move in the reverse direction through the windshield swing device and the guard plate swing device respectively, so that the filter membrane and the isolation cloth can enter the disinfection chamber through the gaps between the windshield and the inlet of the suction pipe, and between the swing sealing plate and the windshield.

[0011] The filter membrane and the isolation cloth are respectively expanded by a filter membrane roller mechanism and an isolation cloth roller mechanism in the disinfection chamber to form a first annular belt and a second annular belt. The roller shaft of the filter membrane roller mechanism is perpendicular to the plane of the induction window and is perpendicular to the roller shaft of the isolation cloth roller mechanism. A sensor assembly is installed on the front side of the inlet of the suction pipe and faces the induction window. The second annular belt surrounds the front and rear sides of the inlet of the suction pipe in the induction window and closely adheres to the rear side of the inlet of the suction pipe and the sensor assembly. A section of the first annular belt covers the inlet of the suction pipe, and its edge contacts the inner circumference of the second annular belt and is surrounded by the second annular belt. One end of the wind deflector away from the suction pipe is rotatably connected to the left and right side walls of the detection channel. The wind deflector is perpendicular to the plane of the induction window, and the front and rear side edges thereof contact the inner circumference of the second annular belt. The swing sealing plate is rotatably connected to the left and right sides of the induction window. The gaps include the gaps between the wind deflector and the inlet of the suction pipe and between the swing sealing plate and the isolation cloth.

[0012] Advantageously, in the above solution, when the subject removes the mask, the face is aligned with the detection channel. The suction pipe sucks away the gas exhaled by the subject, filters and discharges it, avoiding the local retention of the exhaled gas and infecting the next subject. The filter membrane allows the gas to pass through and can intercept pathogens on the surface and pores of the filter membrane. After the subject's detection is completed, it moves to the filter membrane disinfection device through the filter membrane roller mechanism for disinfection. The face of the next subject faces and is close to the filter membrane that has been completely disinfected, without causing cross-infection. The rotation speed of the filter membrane can be reduced to be slow enough, or the travel of the filter membrane in the disinfection chamber can be increased to be long enough to ensure the residence time for thorough disinfection of the filter membrane in the disinfection chamber.

[0013] The disinfection chamber exhaust fan operates to ensure that the air inlet at the gap between the filter membrane support roller and the wind deflector is in a slightly negative pressure state, and the air inlet at the gap between the isolation cloth guard plate and the forehead induction plate is also in a slightly negative pressure state, avoiding the reflux of the gas in the disinfection chamber into the detection channel. When the subject removes the mask and aligns the face with the detection channel, the forehead contacts the isolation cloth. At this time, the isolation cloth is driven out by the isolation cloth roller mechanism after passing through cyclic disinfection in the disinfection chamber, avoiding the transmission route through contact. The isolation cloth is tightened at the front and rear ends of the first annular belt and the wind deflector, forming a good sealing effect and avoiding the reflux of the gas in the disinfection chamber into the detection channel when the air pressure is unstable.

[0014] The sensor assembly is used to identify the forehead of the subject to realize the automatic control of the isolation cloth roller mechanism, the filter membrane roller mechanism, the suction and exhaust fan, the disinfection chamber exhaust fan, the wind deflector swing device, and the guard plate swing device. Restricted by the positioning of the forehead part, regardless of the height and body type of the person being tested, the horizontal position of the mouth and nose is basically fixed, and the longitudinal position change range is not large, determining the standardized fixed position of the person being tested and enabling the automatic control method to be standardized.

[0015] In a preferred embodiment of the control method of the present invention, each time the aforesaid away signal is generated, the filter membrane roller mechanism drives the filter membrane to move unidirectionally into the disinfection chamber by 1.5 to 2 times the width of the detection channel each time and then stops, and the isolation cloth roller mechanism drives the isolation cloth to move unidirectionally into the disinfection chamber by 1 to 1.5 times the width of the induction window each time and then stops.

[0016] Further, the filter membrane roller mechanism and the isolation cloth roller mechanism are started with a time delay.

[0017] Advantageously, the standardized automatic control method makes the most efficient use of each section of the disinfected filter membrane and isolation cloth, and the control steps are safe and reliable.

[0018] Preferably, a camera device is further provided outside the induction window. The camera device is used to collect the face, identity information, and body temperature of the subject to be tested and store them in a memory.

[0019] Advantageously, the camera device collects the face, identity information, and body temperature of the subject to be tested and stores them in the memory, which can prevent the subject from impersonating to conduct the test, and the stored information is printed together with the nucleic acid test result.

[0020] Another technical solution of the present invention is an intelligent isolation window, which includes a cabinet body and a controller. A support plate is arranged in the cabinet body, dividing the cabinet body into a disinfection cabinet above and an installation cabinet below. The upper side of the detection channel is connected to the lower surface of the support plate, and the detection channel also communicates with the front and rear ends of the installation cabinet. The upper side of the detection channel communicates with the disinfection cabinet through a rectangular window on the support plate. The induction window is located above one end of the detection channel facing the subject. The upper end of the suction pipe passes through the cabinet body and is connected to a pipe provided with a suction and exhaust fan. The lower end of the suction pipe faces the window. The front side of the lower end of the suction pipe faces the induction window and is equipped with a sensor assembly. The filter membrane roller mechanism includes a rotatable filter membrane support roller arranged at the lower end of the suction pipe and a plurality of rollers located on the left and right sides of the upper end of the suction pipe. The filter membrane support roller has a hollow structure and a breathable cylinder shell. The filter membrane is stretched by the filter membrane roller mechanism at both ends of the suction pipe. The disinfection chamber is connected to a pipe provided with a disinfection chamber exhaust fan. The wind baffle is rotatably connected to the edge parallel to the through direction of the detection channel in the window below the left and right sides of the filter membrane support roller. The wind baffle is also driven by a wind baffle swing device. The isolation cloth roller mechanism includes an isolation cloth driving roller and an isolation cloth driven roller erected on the support plate and located on the left and right sides of the filter membrane support roller. The isolation cloth is stretched by the isolation cloth roller mechanism, so that the isolation cloth surrounds the front and rear ends of the filter membrane support roller and the wind baffle, and shields the rear end of the filter membrane support roller, the sensor assembly and the front and rear ends of the wind baffle. Disinfection devices are distributed around the annular belt formed by the isolation cloth and the filter membrane in the disinfection chamber. The left and right sides of the induction window are rotatably connected to swing sealing plates, and the swing sealing plates can be driven by a guard plate swing device to be pressed tightly against the surface of the isolation cloth. The controller receives the feedback signal generated by the sensor assembly and controls the isolation cloth roller mechanism, the filter membrane roller mechanism, the suction and exhaust fan, the disinfection chamber exhaust fan, the wind baffle swing device, and the guard plate swing device.

[0021] In a further improved solution of the isolation window of the present invention, the side of the induction window away from the support plate is at the same height as the upper edge of the isolation cloth, and is folded inward into the disinfection chamber to form a first skirt plate. The first skirt plate is slidably connected to a rubber strip arranged on the side of the swing sealing plate facing away from the support plate to form an elastic sealing surface. The first skirt plate also contacts the isolation cloth.

[0022] Preferably, a rubber strip is arranged on the side of the swing sealing plate facing the support plate, and the swing sealing plate is slidably connected to the support plate through the rubber strip to form an elastic sealing surface.

[0023] Advantageously, when the subject's face is aligned with the detection channel after removing the mask, the swing sealing plate is swung and pressed against the isolation cloth, and the upper and lower ends of the swing sealing plate are well sealed, avoiding the backflow of the gas in the disinfection chamber into the detection channel when the air pressure is unstable.

[0024] In a preferred embodiment of the isolation window of the present invention, an installation cabinet is formed on the side of the support plate facing away from the cabinet body. Respective openable and closable cabinet doors II and I are provided at the rear ends of the installation cabinet and the disinfection chamber. The induction window is located above the detection channel, the installation cabinet is located below the disinfection chamber, the ventilation opening is located in the upper part of the detection channel, and the roller mechanism includes the filter membrane support roller, the filter membrane driving roller, and the filter membrane driven roller which are arranged parallel to each other.

[0025] Advantageously, the positional relationship between the induction window and the detection channel conforms to the spatial layout of the human face.

[0026] Beneficial effects:

[0027] (1) Avoid cross-infection. When a person being tested takes a sample of "nasal swab" or "throat swab" for nucleic acid testing, they must remove their mask. At this time, the mouth and nose of the person being tested are completely open and exposed to the atmospheric environment mixed with the exhaled gas of the person being tested in front. If the person being tested in front is a virus carrier, the exhaled virus-containing gas mixes into the atmosphere and will inevitably be inhaled by the person being tested behind, resulting in infection. By using the detection window and detection method provided by the present invention, the exhaled gas of each person being tested is sucked away and subjected to disinfection and sterilization treatment.

[0028] (2) Standardization of nucleic acid testing. When each person being tested takes a sample of "nasal swab" or "throat swab", due to the positioning restriction of the forehead part, regardless of the height and body type of the person being tested, the horizontal positions of the mouth and nose are basically fixed, and the vertical position change range is not large, determining the standardized fixed position of the person being tested. This overcomes the discomfort of the person being tested during sampling and the possible accidents caused by the head movement of the person being tested, which may lead to the medical staff following the movement of the swab in their hands. At the same time, since the positions of the mouth and nose of each person being tested are fixed, the displacement and related actions of the medical staff during sampling operations are reduced (for example, in order to see the sampling point clearly, the medical staff needs to adjust their posture), which is conducive to the establishment of the standardization of the medical staff's detection actions. It provides technical support for the sampling of nucleic acid testing robots.

[0029] (3) High sterilization and disinfection rate. The method of separating collection and killing is adopted for sterilization and disinfection, and the sterilization and disinfection efficiency is improved by "quickly collecting the virus and killing it for a long time".

[0030] Since it is necessary to ensure effective killing of the virus, a certain killing time needs to be guaranteed. For example, when using ultraviolet light for killing, the killing time should be controlled at least above 45 minutes. If all the exhaled gas of the person being tested is collected and put into a container for killing with a residence time of more than 45 minutes, a relatively large volume of disinfection and killing container is required. To overcome this shortcoming, during sampling, the exhaled gas of the person being tested is immediately sucked away, and after being filtered by a filter membrane above the mouth and nose to intercept more than 99% of the germs, it is discharged outside. The filter membrane intercepting the virus is sent into the disinfection chamber for ultraviolet or high-temperature disinfection for more than 60 minutes, and then enters the detection port for recycling.

[0031] To prevent the gas in the disinfection chamber from overflowing from the detection port, a gas extraction port is provided at the upper part of the disinfection chamber, so as to ensure that the gap connecting the disinfection chamber at the detection port is in a slightly negative pressure, completely preventing the virus from overflowing.

[0032] On the other hand, even if a small amount of gas in the disinfection chamber overflows from the gap connecting the disinfection chamber at the detection port, it will be sucked away by the suction force provided by the suction and exhaust fan, enter the suction chamber after being intercepted and purified by the filter membrane, and be discharged through the suction square pipe and the horizontal exhaust pipe.

[0033] (4) High detection efficiency. The protection level of medical staff can be appropriately reduced, and they can avoid wearing protective clothing, which is beneficial to the flexible movement of medical staff and increases their comfort. At the same time, the positions of the mouth and nose of the person being tested are relatively fixed, improving the detection efficiency of medical staff. Description of the Drawings

[0034] Figure 1 It is a longitudinal sectional view in the main viewing direction of the prevention and control device for cross-infection of the population being tested at the nucleic acid testing sampling point in Example 1;

[0035] Figure 2 From Figure 1 The top view of the support plate is obtained by observing downward from the C-C section of

[0036] Figure 3 From Figure 1 The bottom view obtained by observing upward from the C-C section of

[0037] Figure 4 It is a longitudinal sectional view in the left viewing direction of the prevention and control device for cross-infection of the population being tested at the nucleic acid testing sampling point in Example 1;

[0038] Figure 5 It is the front view of the prevention and control device for cross-infection of the population being tested at the nucleic acid testing sampling point in Example 1;

[0039] Figure 6Rear view of the prevention and control device for cross-infection of the tested population at the nucleic acid testing sampling point; where: 2, suction and exhaust fan; 3, disinfection chamber exhaust pipe; 4, disinfection chamber exhaust fan; 5, tensioning roller; 6, filter membrane driven roller; 9, filter membrane driving roller; 10, camera; 12, forehead induction plate; 11, sensor; 15, isolation cloth; 16, detection channel; 20, disinfection device; 21, cabinet door one; 22, suction pipe; 23, disinfection cabinet; 24, filter membrane; 25, isolation cloth driven roller; 26, support plate; 27, cabinet door two; 28, installation cabinet; 29, roller shaft; 31, horizontal exhaust duct; 32, first skirt board; 33, filter membrane support roller; 36, cabinet body; 37, isolation cloth driving roller; 38, wind deflector; 39, induction window; 40, window sill board; 42, wind deflector swing device; 43, detection port side plate; 44, window; 131, guard plate swing device; 132, guard plate fixing plate; 133, swing sealing plate; 26-1, edge. Specific embodiments

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0041] Embodiment 1

[0042] As Figure 1 is a longitudinal sectional view in the main viewing direction of the prevention and control device for cross-infection of the tested population at the nucleic acid testing sampling point, including: a hollow cabinet body 36, a support plate 26 is horizontally placed in the cabinet body 36, and the support plate 26 divides the cabinet body 36 into a disinfection cabinet 23 above and an installation cabinet 28 below. The four peripheral edges of the support plate 26 are filled with sealant and hermetically connected to the inner circumference of the cabinet body 36. As Figure 2 , looking down from the C-C position to the lower side to obtain the top view of the support plate, a rectangular window 44 is opened in the middle of the support plate 26. The edges 26-1 parallel to the left and right sides of the cabinet body 36 in the window 44 extend from the middle of the support plate 26 to the front side of the support plate 26. Two detection port side plates 43 are connected to the support plate 26 below the support plate 26. The front and rear ends of the detection port side plates 43 extend to the front and rear end faces of the cabinet body 36. The lower ends of the two detection port side plates 43 are connected by a window sill board 40. The detection port side plates 43, the window sill board 40, and the support plate 26 enclose a detection channel 16. The front and rear end faces of the cabinet body 36 are provided with holes matching the detection channel 16. The upper side window 44 of the detection channel 16 is a ventilation opening.

[0043] See Figure 1 , the disinfection cabinet 23 has a hollow disinfection chamber, and a disinfection device 20, a filter membrane 24, a filter membrane roller mechanism, and a suction pipe 22 are installed in the disinfection chamber. The exhaust end (i.e., the upper end) of the suction pipe 22 passes through the cabinet body 36 and is connected to the pipeline of the suction and exhaust fan 2 ( Figure 4The horizontal exhaust pipe 31 is disposed in the middle, the air intake end (i.e., the lower end) of the air intake pipe 22 is directly opposite to the vent (i.e., the window 44) of the detection channel 16, the front side of the lower end of the air intake pipe 22 faces the sensing window 39 and is installed with a sensor assembly, the sensor assembly includes a forehead sensing plate 12 and a sensor 11, the sensor 11 includes a temperature sensor, the forehead sensing plate 12 includes a pressure sensor, the filter membrane roller mechanism includes a filter membrane support roller 33 rotatable at the air intake end of the air intake pipe 22 (i.e., the entrance of the air intake pipe 22), and a filter membrane drive roller 9 and a filter membrane driven roller 6 located on both sides of the upper part of the air intake pipe 22, the roller shafts 29 of the filter membrane support roller 33, the filter membrane drive roller 9, and the filter membrane driven roller 6 are all parallel to the through direction of the detection channel 16 and are arranged around the air intake pipe 22 to form a triangle, the filter membrane support roller 33 has a hollow structure and a permeable shell, The filter membrane 24 allows gas to pass through and can retain pathogens on the filter membrane surface and in the membrane pores. The filter membrane 24 is stretched open by the filter membrane roller mechanism to form a triangular ring fence around the suction pipe 22, and is driven to rotate around the filter membrane roller mechanism in the disinfection cabinet 23 to perform periodic circulation motion between the disinfection device 20 and the vent. The disinfection chamber is connected to a pipe 3 provided with a disinfection chamber exhaust fan 4, and the filter membrane roller mechanism also includes a tensioning roller 5.

[0044] Windshields 38 are symmetrically arranged on the left and right sides of the through direction of the detection channel 16. The windshields 38 are rotatably connected to one end of the two detection port side plates 43 of the detection channel 16 near the vent. The windshields 38 are driven by the windshield swinger 42 and can be close to the filter membrane 24 on the surface of the filter membrane support roller 33. The left and right sides of the support plate 26 are respectively erected with an isolation cloth roller mechanism consisting of an isolation cloth driving roller 37 and an isolation cloth driven roller 25. The isolation cloth 15 is installed in the disinfection cabinet 23 and is stretched open by the isolation cloth roller mechanism installed in the disinfection cabinet 23, so that the isolation cloth 15 surrounds the front and rear ends of the filter membrane support roller 33 and the windshield 38, and shields the rear end surface of the inlet of the suction pipe 22, the sensor assembly and the front and rear ends of the windshield 38. The isolation cloth 15 is driven to rotate around the isolation cloth roller mechanism and perform periodic circulation between the disinfection device 20 and the filter membrane support roller 33.

[0045] See the top view from CC looking down to get the top of the support plate Figure 3 , and the longitudinal section from the left of the cross-infection prevention and control device for the tested population at the nucleic acid testing sampling point Figure 4 A pair of windshield plates 38 are located in the annular fence space surrounded by the stretched isolation cloth 15. The side of the windshield plates 38 close to the front and rear end surfaces of the cabinet 36 contacts the isolation cloth 15 to form a slidable elastic sealing surface. Figure 5Front view of the intelligent isolation window. An induction window 39 is also provided on the front end face of the cabinet body 36, which is directly opposite to the front end of the filter membrane support roller 33. The side edge of the induction window 39 close to the isolation cloth driving roller 37 and the isolation cloth driven roller 25 is rotatably connected to the swing sealing plate 133. The swing sealing plate 133 can be driven by the guard plate swing device 131 to be pressed tightly against the surface of the isolation cloth 15. The side of the induction window 39 away from the support plate 26 is at the same height as the upper edge of the isolation cloth 15, and a first skirt plate 32 is formed by inverting the disinfection cavity. The first skirt plate 32 is slidably connected to the rubber strip provided on the side of the swing sealing plate 133 facing away from the support plate 26 to form an elastic sealing surface. The first skirt plate 32 also contacts the isolation cloth 15. A rubber strip is provided on the side of the swing sealing plate 133 facing the support plate 26. The swing sealing plate 133 is slidably connected to the support plate 26 through the rubber strip to form an elastic sealing surface.

[0046] The disinfection device can be an ultraviolet lamp.

[0047] Such as Figure 6 Rear view of the intelligent isolation window. The rear ends of the installation cabinet 28 and the disinfection cabinet 23 are respectively provided with an openable and closable second cabinet door 27 and a first cabinet door 21.

[0048] The intelligent isolation window further includes: a controller, which receives the feedback signals generated by the sensor assembly and controls the isolation cloth roller mechanism, the filter membrane roller mechanism, the suction and exhaust fan 2, the disinfection chamber exhaust fan 4, the windshield swing device 42, and the guard plate swing device 131.

[0049] A camera 10 is also installed on the front end face of the cabinet body 36, which is used to take pictures and record the infrared temperature of the subject and store them in the memory.

[0050] The imaging device collects the face, identity information, and body temperature of the subject and stores them in the memory, which can prevent the subject from impersonating and being detected. The stored information is printed together with the nucleic acid test results.

[0051] The method for controlling the intelligent isolation window during nucleic acid testing includes the following steps:

[0052] Using the sensor assembly to collect the following feedback signals through the rectangular induction window 39 above the detection channel 16: the approaching signal generated by the sensor assembly when the forehead of the subject approaches the induction window 39; the departing signal generated by the sensor assembly when the forehead of the subject leaves the induction window 39.

[0053] According to the approaching signal, drive the suction and exhaust fan 2 to increase the suction flow rate. After the gas exhaled by the subject into the detection channel 16 is filtered by the filter membrane 24 to remove pathogens, it is then discharged through the suction pipe 22 and the suction and exhaust fan 2; according to the departing signal, drive the suction and exhaust fan 2 to reduce the suction flow rate after a delay of 10 - 20 seconds. At the same time, the filter membrane roller mechanism drives the filter membrane 24 that shields the inlet of the suction pipe 22 during the current nucleic acid detection sampling to move into the disinfection chamber, and disinfects the pathogens intercepted by the filter membrane 24.

[0054] According to the departing signal, the isolation cloth roller mechanism drives the isolation cloth 15 that shields the sensor assembly during the current nucleic acid detection to move into the disinfection chamber, and disinfects the pathogens transmitted from the subject's body surface to the surface of the isolation cloth 15.

[0055] According to the approaching signal, drive the disinfection chamber exhaust fan 4 to increase the suction flow rate, increase the negative pressure difference between the disinfection chamber and the detection channel 16, and prevent the gas in the disinfection chamber from flowing into the detection channel 16. According to the departing signal, drive the disinfection chamber exhaust fan 4 to reduce the suction flow rate after a delay.

[0056] According to the approaching signal, drive the symmetrically arranged windshields 38 through the windshield swing device 42 to press the filter membrane 24 tightly from the left and right sides of the inlet of the suction pipe 22. At the same time, drive the symmetrically arranged swing sealing plates 133 through the guard plate swing device 131 to press the isolation cloth 15 tightly from the left and right sides of the induction window 39, reducing the gap from the detection channel 16 to the disinfection chamber; and according to the departing signal, drive the windshields 38 and the swing sealing plates 133 to move in the opposite direction through the windshield swing device 42 and the guard plate swing device 131 respectively, so that the filter membrane 24 and the isolation cloth 15 can enter the disinfection chamber through the gaps between the windshields 38 and the inlet of the suction pipe 22, and between the swing sealing plates 133 and the windshields 38.

[0057] The filter membrane roller mechanism drives the filter membrane 24 to move unidirectionally into the disinfection chamber by 1.5 - 2 times the width of the detection channel 16 each time and then stops. The isolation cloth roller mechanism drives the isolation cloth 15 to move unidirectionally into the disinfection chamber by 1 - 1.5 times the width of the induction window 39 each time and then stops. By setting the spacing between the rollers in the filter membrane roller mechanism and the isolation cloth roller mechanism, ensure that the circumferences of the filter membrane and the isolation cloth meet the requirement of staying in the disinfection chamber for at least 60 minutes.

[0058] Each time the departing signal is generated, the filter membrane roller mechanism and the isolation cloth roller mechanism are started after a delay of 20 - 30 seconds. The delay of 20 - 30 seconds is to avoid unnecessary repeated operations of the control system instructions caused by the subject leaving temporarily for other reasons.

[0059] The smart isolation window provided by the present invention also includes an optional simplified implementation scheme, which omits the filter membrane support roller 33 and replaces the filter membrane support roller 33 with the inlet of the suction pipe 22. The inlet of the suction pipe 22 can be constructed as a hollow cylinder, and the axis of the cylinder is perpendicular to the plane of the sensing window 39.

[0060] The filter membrane 24 and the isolation cloth 15 are respectively stretched by the filter membrane roller mechanism and the isolation cloth roller mechanism in the disinfection chamber to form a first annular belt and a second annular belt. The roller axis of the filter membrane roller mechanism is perpendicular to the plane of the sensing window 39 and is perpendicular to the roller axis of the isolation cloth roller mechanism. The sensor assembly is installed on the front side of the inlet of the suction pipe 22 and faces the sensing window 39. The second annular belt surrounds the front and rear sides of the inlet of the suction pipe 22 in the sensing window 39 and is close to the rear side of the inlet of the suction pipe 22 and the sensor assembly. The first annular belt A section of the windshield 38 shields the entrance of the intake pipe 22, and its edge contacts the inner circumference of the second annular belt and is surrounded by the second annular belt. One end of the windshield 38 away from the intake pipe 22 is rotatably connected to the left and right side walls of the detection channel 16. The windshield 38 is perpendicular to the plane of the sensing window 39, and its front and rear side edges contact the inner circumference of the second annular belt. The swing sealing plate 133 is rotatably connected to the left and right sides of the sensing window 39, and the gap includes the gap between the windshield 38 and the entrance of the intake pipe 22, and the gap between the swing sealing plate 133 and the isolation cloth 15.

Claims

1. A nucleic acid detection sampling point prevention and control device for cross-infection of the tested population, characterized in that, It includes a cabinet body (36) and a controller. A support plate (26) is arranged in the cabinet body (36), which divides the cabinet body (36) into a disinfection cabinet (23) above and an installation cabinet (28) below. The disinfection cabinet (23) has a hollow disinfection chamber, and a disinfection device (20), a filter membrane (24), a filter membrane roller mechanism, and an air suction pipe (22) are installed in the disinfection chamber. The upper side of the detection channel (16) is connected to the lower surface of the support plate (26), and the detection channel (16) also communicates with the front and rear ends of the installation cabinet (28). The upper side of the detection channel (16) communicates with the disinfection cabinet (23) through a rectangular window (44) on the support plate (26). An induction window (39) is located above one end of the detection channel (16) facing the subject. The upper end of the air suction pipe (22) passes through the cabinet body (36) and is connected to a pipe provided with an air suction and exhaust fan (2). The lower end of the air suction pipe (22) faces the window (44), and the front side of the lower end of the air suction pipe (22) faces the induction window (39) and a sensor assembly is installed. The filter membrane roller mechanism includes a filter membrane support roller (33) rotatably arranged at the lower end of the air suction pipe (22), and a plurality of rollers located on the left and right sides of the upper end of the air suction pipe (22). The filter membrane support roller (33) has a hollow structure and a breathable cylinder shell. The filter membrane (24) is stretched by the filter membrane roller mechanism at both ends of the air suction pipe (22). A pipe provided with a disinfection chamber exhaust fan (4) is connected to the disinfection chamber. A wind baffle (38) is rotatably connected to the edge parallel to the penetration direction of the detection channel (16) in the window (44) below the left and right sides of the filter membrane support roller (33). The wind baffle (38) is also driven by a wind baffle swing device (42). The isolation cloth roller mechanism includes an isolation cloth driving roller (37) and an isolation cloth driven roller (25) erected on the support plate (26) and located on the left and right sides of the filter membrane support roller (33). The isolation cloth (15) is stretched by the isolation cloth roller mechanism, so that the isolation cloth (15) surrounds the front and rear ends of the filter membrane support roller (33) and the wind baffle (38), and shields the rear end of the filter membrane support roller (33), the sensor assembly, and the front and rear ends of the wind baffle (38). The disinfection device (20) is distributed around the annular belt formed by the isolation cloth (15) and the filter membrane (24) in the disinfection chamber. The left and right sides of the induction window (39) are rotatably connected to a swing sealing plate (133), and the swing sealing plate (133) can be driven by a guard plate swing device (131) to be pressed tightly against the surface of the isolation cloth (15). The controller receives the feedback signal generated by the sensor assembly and controls the isolation cloth roller mechanism, the filter membrane roller mechanism, the air suction and exhaust fan (2), the disinfection chamber exhaust fan (4), the wind baffle swing device (42), and the guard plate swing device (131); The sensor assembly collects the following feedback signals at the rectangular induction window (39) above the detection channel (16): a proximity signal generated by the sensor assembly when the forehead of the subject approaches the induction window (39); a departure signal generated by the sensor assembly when the forehead of the subject leaves the induction window (39); according to the proximity signal, the suction and exhaust fan (2) is driven to increase the suction flow rate, and the gas exhaled by the subject into the detection channel (16) is filtered by the filter membrane (24) to remove pathogens and then discharged through the suction pipe (22) and the suction and exhaust fan (2); according to the departure signal, the suction and exhaust fan (2) is driven to delay the reduction of the suction flow rate, and at the same time, the filter membrane roller mechanism drives the filter membrane (24) that shields the inlet of the suction pipe (22) during the current nucleic acid detection sampling to move into the disinfection chamber to disinfect the pathogens intercepted by the filter membrane (24); according to the departure signal, the isolation cloth roller mechanism drives the isolation cloth (15) that shields the sensor assembly during the current nucleic acid detection to move into the disinfection chamber to disinfect the pathogens transmitted from the surface of the subject to the surface of the isolation cloth (15); according to the proximity signal, the disinfection chamber exhaust fan (4) is driven to increase the suction flow rate to increase the negative pressure difference between the disinfection chamber and the detection channel (16) to prevent the gas in the disinfection chamber from flowing into the detection channel (16), and according to the departure signal, the disinfection chamber exhaust fan (4) is driven to delay the reduction of the suction flow rate; according to the proximity signal, the wind deflector swing device (42) is used to drive the symmetrically arranged wind deflectors (38) to press the filter membrane (24) from both the left and right sides of the inlet of the suction pipe (22), and at the same time, the guard plate swing device (131) is used to drive the symmetrically arranged swing sealing plates (133) to press the isolation cloth (15) from both the left and right sides of the induction window (39) to reduce the gap from the detection channel (16) to the disinfection chamber;And according to the described away signal, the windshield (38) and the swing sealing plate (133) are respectively driven to move in the reverse direction by the windshield swing device (42) and the guard plate swing device (131), so that the filter membrane (24) and the isolation cloth (15) can enter the disinfection chamber through the gaps between the windshield (38) and the inlet of the suction pipe (22), and between the swing sealing plate (133) and the windshield (38); the filter membrane (24) and the isolation cloth (15) are respectively stretched by the filter membrane roller mechanism and the isolation cloth roller mechanism in the disinfection chamber to form a first annular belt and a second annular belt. The roller shaft of the filter membrane roller mechanism is perpendicular to the plane of the induction window (39) and is perpendicular to the roller shaft of the isolation cloth roller mechanism. A sensor assembly is installed on the front side of the inlet of the suction pipe (22) and faces the induction window (39). The second annular belt surrounds the front and rear sides of the inlet of the suction pipe (22) in the induction window (39), and closely adheres to the rear side of the inlet of the suction pipe (22) and the sensor assembly. A section of the first annular belt shields the inlet of the suction pipe (22), and its edge contacts the inner circumference of the second annular belt and is surrounded by the second annular belt. One end of the windshield (38) away from the suction pipe (22) is rotatably connected to the left and right side walls of the detection channel (16). The windshield (38) is perpendicular to the plane of the induction window (39), and the front and rear side edges thereof contact the inner circumference of the second annular belt. The swing sealing plate (133) is rotatably connected to the left and right sides of the induction window (39). The gaps include the gaps between the windshield (38) and the inlet of the suction pipe (22), and between the swing sealing plate (133) and the isolation cloth (15).; 2. The prevention and control device according to claim 1, wherein Each time the said away signal is generated, the filter membrane roller mechanism drives the filter membrane (24) to move unidirectionally into the disinfection chamber by 1.5 - 2 times the width of the detection channel (16) each time and then stops, and the isolation cloth roller mechanism drives the isolation cloth (15) to move unidirectionally into the disinfection chamber by 1 - 1.5 times the width of the induction window (39) each time and then stops.

3. The prevention and control device according to claim 2, characterized in that, Each time the said away signal is generated, both the filter membrane roller mechanism and the isolation cloth roller mechanism start with a delay.

4. The prevention and control device according to claim 3, wherein A camera device (10) is further provided outside the induction window (39). The camera device (10) is used to collect the face, identity information, and body temperature of the subject to be examined and store them in a memory.

5. The prevention and control device according to claim 1, characterized in that, One side of the induction window (39) away from the support plate (26) is at the same height as the upper edge of the isolation cloth (15) and is folded inward into the disinfection chamber to form a first skirt plate (32). The first skirt plate (32) is slidably connected to a rubber strip provided on the side of the swing sealing plate (133) facing away from the support plate (26) to form an elastic sealing surface. The first skirt plate (32) is also in contact with the isolation cloth (15).

6. The prevention and control device according to claim 1, characterized in that, A rubber strip is provided on the side of the swing sealing plate (133) facing the support plate (26). The swing sealing plate (133) is slidably connected to the support plate (26) through the rubber strip to form an elastic sealing surface.

7. The prevention and control device according to any one of claims 2 to 6, characterized in that, An installation cabinet (28) is formed on the side of the support plate (26) facing away from the cabinet body (36). A second openable cabinet door (27) and a first cabinet door (21) are respectively provided at the rear ends of the installation cabinet (28) and the disinfection chamber. The induction window is located above the detection channel (16), the installation cabinet (28) is located below the disinfection chamber, the ventilation opening is located in the upper part of the detection channel (16), and the filter membrane roller mechanism includes the filter membrane support roller (33), the filter membrane driving roller (9), and the filter membrane driven roller (6) arranged in parallel.

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