Disposable medical breathing filter element detection equipment

Abstract

The invention relates to the technical field of filter element detection, in particular to filter element detection equipment for a disposable medical breathing filter. Comprising an operation table and a tester body installed at the upper end of the operation table. Two groups of clamping mechanisms are mounted between the operation table and the tester body; the clamping mechanism comprises an upper pressing head and a lower pressing head; by arranging the upper pressure head and the lower pressure head, the upper pressure head and the lower pressure head can press and seal a filter with a filter element, so that test gas can enter an inlet of the filter and penetrate through the filter element to be discharged from an outlet of the filter, and in the process, the particle concentration of the test gas discharged from the gas outlet is monitored, and if the particle concentration is too high, the test gas can be detected. Therefore, the problem that air flow flows around due to the fact that the shell and the filter element are not tightly sealed is effectively avoided, accurate detection of the filter element in a finished filter is further ensured, and the real performance of the filter element in actual use is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of filter element detection, and specifically relates to a detection device for disposable medical respiratory filter elements. Background Art

[0002] A disposable medical respiratory filter is a crucial device during respiration, anesthesia, and first aid processes. It can effectively filter harmful substances in the air, thereby protecting the user's respiratory system from pollution. For example, during pulmonary function testing, by connecting a disposable respiratory filter to a pulmonary function instrument, it can effectively filter the saliva generated by the patient when exhaling, significantly reducing the pollution inside the instrument and avoiding cross-infection between different patients. This design not only improves the hygiene and safety of medical devices but also ensures the health protection of patients and medical staff. A disposable medical respiratory filter usually consists of a housing and a filter element, equipped with an air inlet and an air outlet. The material of the filter element generally uses high-efficiency filter paper and non-woven fabric, and multiple layers of materials are compounded together by methods such as hot pressing or ultrasonic welding. To enhance the filtering effect, an antibacterial or antiviral coating is often applied to the surface of the filter element. Subsequently, the filter element is cut into appropriate shapes and sizes according to the design requirements and sterilized by methods such as high-pressure steam sterilization or radiation sterilization. Before assembly, some of the sterilized filter elements need to be sampled for quality inspection in aspects such as filtration efficiency, airtightness, mechanical strength, and sterilization effect. After the filter element passes the inspection, it is assembled with the housing to complete the final product. Since the particulate matter filter tester usually detects the filter element before the filter is assembled, the overall performance of the assembled finished filter will affect its actual filtering effect. Especially when the filter element is installed in the filter housing, the sealing between the housing and the filter element is crucial. If the seal between the housing and the filter element is not tight, air may flow directly around the filter element, resulting in ineffective filtering of harmful particles, which will significantly affect the filtration efficiency. Therefore, when detecting the filtration efficiency of the filter element, the filter element installed in the finished filter should be detected, so as to obtain more accurate test results and ensure the performance of the filter element in actual use. In view of this, to overcome the above technical problems, the present invention proposes a detection device for disposable medical respiratory filter elements, which solves the above technical problems. Summary of the Invention

[0003] In order to make up for the deficiencies of the prior art, the present invention proposes a detection device for a disposable medical respiratory filter element. By setting an upper pressing head and a lower pressing head, the upper pressing head and the lower pressing head can tightly seal the filter containing the filter element, so that the test gas can enter the inlet of the filter and pass through the filter element and discharge from the outlet of the filter. During this process, by monitoring the particle concentration of the test gas discharged from the air outlet, if the concentration is too high, it is determined that there is a sealing problem between the outer shell and the filter element, thus effectively avoiding the problem of air flow bypass caused by insufficient sealing between the outer shell and the filter element, and further ensuring the accurate detection of the filter element in the finished filter to obtain the true performance of the filter element in actual use.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: A detection device for a disposable medical respiratory filter element described in the present invention includes an operation table and a tester body installed at the upper end of the operation table; there are two clamping mechanisms installed between the operation table and the tester body; the clamping mechanism includes an upper pressing head and a lower pressing head; the upper pressing head is fixedly connected to the tester body; an air inlet communicating with the tester body is opened at the lower end of the upper pressing head; an installation groove is opened at the upper end of the operation table; the lower pressing head is connected in the installation groove through a hydraulic push rod; an air outlet is opened at the upper end of the lower pressing head; a particle counter is installed inside the operation table; the particle counter is connected to the air outlet through a corrugated pipe; an installation frame is arranged between the operation table and the tester body; two rollers are rotatably connected to one side of the installation frame; a belt drive connection is carried out between the two rollers through a transmission belt; a drive motor connected to the roller is fixedly installed on one side of the installation frame; a blower is installed at the upper end of the tester body. A sealing unit, the sealing unit is installed in the upper pressing head and the lower pressing head; the sealing unit is used to clamp the respiratory filter.

[0005] Preferably, a screw rod is arranged below the roller and is in screw drive connection with the installation frame; the threads at both ends of the screw rod are arranged in opposite directions; the two installation frames are distributed at both ends of the screw rod; one end of the screw rod is rotatably connected to the operation table, and the other end is rotatably connected to the tester body; sealing rings are fixedly connected to the ends of the upper pressing head and the lower pressing head that are close to each other.

[0006] Preferably, a blocking rod is arranged above the transmission belt; an electric push rod is fixedly connected to the upper end of the blocking rod; the end of the electric push rod away from the blocking rod is slidably connected to the tester body through a slider; a lead screw is threadedly connected to the lower end of the slider.

[0007] Preferably, the sealing unit includes an annular air bag; straight pipes are threadedly connected inside the upper pressing head and the lower pressing head; the annular air bag is fixedly connected to the surface of the straight pipe; the annular air bag is connected to the blower through a spring hose.

[0008] Preferably, an air passage communicating with the annular airbag is provided inside the straight pipe; a groove communicating with the air passage is provided on the surface of the straight pipe; air holes are provided inside the pressing head; one end of the air holes is connected to a spring hose, and the other end is communicated with the groove.

[0009] Preferably, an annular groove is provided on the outer wall of the annular airbag.

[0010] Preferably, a pressing groove is provided on the surface of the pressing head; a pressing rod is slidably connected in the pressing groove; a magnetic block is fixedly connected to the surface of the pressing rod; electromagnetic plates are inlaid on the inner walls of the air inlet and the air outlet.

[0011] Preferably, a pressing block is fixedly connected to one end of the pressing rod away from the pressing groove; there are two groups of pressing rods, one on the upper side and the other on the lower side.

[0012] The beneficial effects of the present invention are as follows: By providing the upper pressing head and the lower pressing head, the present invention enables the upper pressing head and the lower pressing head to tightly seal the filter containing the filter element, so that the test gas can enter the inlet of the filter and pass through the filter element and be discharged from the outlet of the filter. During this process, by monitoring the particle concentration of the test gas discharged from the air outlet, if the concentration is too high, it is determined that there is a sealing problem between the outer shell and the filter element, thus effectively avoiding the problem of air flow bypass caused by insufficient sealing between the outer shell and the filter element, and further ensuring the accurate detection of the filter element in the finished filter, so as to obtain the true performance of the filter element in actual use.

[0013] By providing the transmission belt, the present invention enables the transmission belt to directly convey the filter to the tester body for testing. Compared with manually placing the filter, it can reduce the labor intensity of the operator. Especially when a large number of tests are carried out on large-sized filters, manual placement not only has low efficiency but also is prone to fatigue, while the conveyor belt can work continuously, greatly reducing the labor intensity of the operator and ensuring the stability and consistency of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the drawings and embodiments.

[0015] Figure 1 is a perspective view of the present invention equipped with a hydraulic push rod; Figure 2 is Figure 1 an enlarged view of part A in Figure 3 is a bottom view of the present invention; Figure 4 is a partial cross-sectional view of the operating table used in the present invention; Figure 5 is Figure 4 an enlarged view of part B in In the figure: 1. Operating table; 11. Tester body; 12. Upper pressure head; 121. Air inlet; 13. Lower pressure head; 131. Air outlet; 132. Tightening groove; 133. Tightening rod; 134. Magnet; 135. Electromagnetic plate; 136. Tightening block; 14. Installation groove; 141. Hydraulic push rod; 15. Particle counter; 151. Bellows; 16. Fan; 17. Annular airbag; 171. Straight pipe; 172. Spring hose; 173. Air passage; 174. Groove; 175. Air hole; 176. Annular groove; 2. Mounting rack; 21. Roller; 22. Transmission belt; 23. Driving motor; 24. Screw; 25. Blocking rod; 26. Electric push rod; 27. Slide block; 28. Lead screw. Detailed implementation mode

[0016] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation modes.

[0017] As Figures 1 to 5 As shown in the figure, a disposable medical respiratory filter element detection device of the present invention includes an operating table 1 and a tester body 11 installed on the upper end of the operating table 1; two clamping mechanisms are installed between the operating table 1 and the tester body 11; the clamping mechanism includes an upper pressure head 12 and a lower pressure head 13; the upper pressure head 12 is fixedly connected to the tester body 11; an air inlet 121 communicating with the tester body 11 is opened at the lower end of the upper pressure head 12; an installation groove 14 is opened at the upper end of the operating table 1; the lower pressure head 13 is connected in the installation groove 14 through a hydraulic push rod 141; an air outlet 131 is opened at the upper end of the lower pressure head 13; a particle counter 15 is installed inside the operating table 1; the particle counter 15 is connected to the air outlet 131 through a bellows 151; a mounting rack 2 is arranged between the operating table 1 and the tester body 11; two rollers 21 are rotatably connected to one side of the mounting rack 2; a belt drive connection is carried out between the two rollers 21 through a transmission belt 22; a driving motor 23 connected to the roller 21 is fixedly installed on one side of the mounting rack 2; a fan 16 is installed on the upper end of the tester body 11. Sealing unit, the sealing unit is installed in the upper pressure head 12 and the lower pressure head 13; the sealing unit is used to clamp the respiratory filter.

[0018] As an implementation mode of the present invention, a screw 24 in screw drive connection with the mounting rack 2 is arranged below the roller 21; the threads at both ends of the screw 24 are arranged in opposite directions; the two mounting racks 2 are distributed at both ends of the screw 24; one end of the screw 24 is rotatably connected to the operating table 1, and the other end is rotatably connected to the tester body 11; sealing rings are fixedly connected to the mutually approaching ends of the upper pressure head 12 and the lower pressure head 13.

[0019] As an embodiment of the present invention, a blocking rod 25 is provided above the conveyor belt 22; an electric push rod 26 is fixedly connected to the upper end of the blocking rod 25; one end of the electric push rod 26 away from the blocking rod 25 is slidably connected to the tester body 11 through a slider 27; a lead screw 28 is threadedly connected to the lower end of the slider 27.

[0020] During operation, since the particulate filter tester usually detects the filter element before the filter is assembled, and the overall performance of the assembled finished filter will affect its actual filtration effect. In particular, when the filter element is installed in the filter housing, the sealing between the housing and the filter element is crucial. If the seal between the housing and the filter element is not tight, air may flow directly around the filter element, resulting in ineffective filtration of harmful particles, which will significantly affect the filtration efficiency. Therefore, when testing the filtration efficiency of the filter element, the filter element installed in the finished filter should be tested. Only in this way can more accurate test results be obtained to ensure the performance of the filter element in actual use. In response to this, the present invention sets the upper pressing head 12 and the lower pressing head 13 so that the upper pressing head 12 and the lower pressing head 13 can tightly seal the filter containing the filter element, enabling the test gas to enter the inlet of the filter and pass through the filter element and discharge from the outlet of the filter. During this process, by monitoring the particle concentration of the test gas discharged from the air outlet 131, if the concentration is too high, it is determined that there is a sealing problem between the housing and the filter element, effectively avoiding the problem of air flow bypass caused by the loose seal between the housing and the filter element, and thus ensuring the accurate detection of the filter element in the finished filter to obtain the true performance of the filter element in actual use.

[0021] During use, there are two conveyor belts. The user places the medical breathing filter to be tested at the upper ends of the two conveyor belts, controls the operation of the driving motor 23, so that the driving motor 23 can drive the roller 21 to rotate, so that the roller 21 can drive the conveyor belt 22 to rotate, so that the conveyor belt 22 drives the filter at the upper end to move to the blocking rod 25, so that the filter is blocked by the blocking rod 25 and is in sliding contact with the conveyor belt 22. At this time, the lower end outlet of the filter is directly opposite to the pressing head 13. First, control the electric push rod 26 to contract, so that the electric push rod 26 pulls the blocking rod 25 to rise. Then, control the hydraulic push rod 141 to extend, so that the hydraulic push rod 141 can push the pressing head 13 to rise, so that the pressing head 13 continuously approaches the filter until the outlet at the lower end of the filter is inserted into the air outlet 131 of the pressing head 13. At this time, control the sealing unit in the pressing head 13 to operate, so that the sealing unit seals the filter inserted into the air outlet 131, so that the outlet of the filter is only connected to the air outlet 131. As the hydraulic push rod 141 continues to push the pressing head 13 to rise, the pressing head 13 can drive the filter above to rise synchronously until the inlet at the upper end of the filter is inserted into the air inlet 121 of the upper pressing head 12, so that the upper pressing head 12 and the lower pressing head 13 clamp the filter. At this time, the sealing unit in the upper pressing head 12 clamps and seals the inlet part of the filter inserted into the air inlet 121 of the upper pressing head 12.

[0022] By setting that a sealing ring is fixedly connected to the mutually approaching ends of the upper pressing head 12 and the lower pressing head 13, the upper pressing head 12 and the lower pressing head 13 are in contact with the filter through the sealing ring. Since the sealing ring is made of silica gel material, the sealing ring is deformed by the extrusion of the filter and the upper pressing head 12 and the lower pressing head 13. Furthermore, the upper pressing head 12 and the lower pressing head 13 can clamp the filter through the sealing ring. Since the housing of the filter is made of plastic material, the upper pressing head 12 and the lower pressing head 13 are in contact with the filter through the sealing ring, reducing the risk of extrusion damage to the housing of the filter caused by the upper pressing head 12 and the lower pressing head 13.

[0023] After the filter is clamped by the upper pressing head 12 and the lower pressing head 13, control the fan 16 to operate, so that the fan 16 conveys air (test air flow) into the interior of the inlet of the filter through the air inlet 121 of the upper pressing head 12. At the same time, the aerosol particle generator in the tester body 11 generates aerosol particles and injects them into the test air flow, so that the aerosol particles in the test air flow reach the set concentration. At this time, the test gas entering the inlet of the filter passes through the filter element of the filter and is discharged from the outlet of the filter. The test gas discharged from the outlet of the filter will enter the air outlet 131 of the lower pressing head 13, and finally flow into the particle counter 15 through the corrugated pipe 151, so that the particle counter 15 measures the concentration of aerosol particles in the test gas in real time, and calculates the filtration efficiency of the filter element according to the change of the particulate matter concentration at the inlet end and the outlet end.

[0024] By setting two sets of clamping mechanisms, the two sets of clamping mechanisms can synchronously detect two filters of the same batch, making the two filters to be tested be each other's control groups, and enabling the two filters to be tested under the same conditions, including the same air flow, particulate concentration, pressure, etc. This helps to compare the test results under the same test conditions. If the seal of one of the filters is not tight, a higher particulate concentration will be detected by the particle counter 15, thus timely discovering the sealing problem between the housing and the filter element. In addition, the synchronous detection of the two filters reduces the variable differences during the test process, thereby providing more accurate test results, avoiding the inconsistent results caused by the test differences at different times or by different operators, and further improving the detection accuracy of the filter efficiency of the filter element.

[0025] By setting the conveyor belt 22, the conveyor belt 22 can directly convey the filter to the tester body 11 for testing. Compared with manually placing the filter, it can reduce the labor intensity of the operator. Especially when a large number of tests are carried out on large-sized filters, manual placement not only has low efficiency but also is prone to fatigue, while the conveyor belt can work continuously, greatly reducing the labor intensity of the operator and ensuring the stability and consistency of the operation.

[0026] Due to the differences in facial sizes between adults and children, the sizes of the filters are also different. In addition, in order to improve the filtering performance, some high-efficiency filters use more layers of filter elements or thicker filter materials, which results in the filters becoming larger. To ensure that the conveyor belt 22 can convey large-sized filters, the present invention sets a screw rod 24, enabling the user to rotate the screw rod 24, so that the screw rod 24 can drive the mounting brackets 2 at both ends to move away from each other, and the screw rod 24 can drive the two mounting brackets 2 to drive the conveyor belt 22 to move away from each other, so as to ensure that the outlet of the large-sized filter can be placed between the two conveyor belts 22, enabling the conveyor belt 22 to stably convey the large-sized filter. In addition, the diameter of the large-sized filter is relatively large. To ensure that the outlet and inlet of the large-sized filter are respectively aligned with the lower pressing head 13 and the upper pressing head 12, by setting the electric push rod 26 to be slidably connected to the tester body 11 through the slider 27, the user can directly push the slider 27 to drive the electric push rod 26 and the blocking rod 25 to move, so as to adjust the position of the blocking rod 25, so that the large-sized filter blocked by the blocking rod 25 can still be located directly below the lower pressing head 13, facilitating the stable connection of the large-sized filter with the lower pressing head 13. After the blocking rod 25 is in the specified position, the user only needs to rotate the screw rod 28 to make the screw rod 28 abut against the tester body 11, so that the screw rod 28 fixes the slider 27 and the tester body 11.

[0027] As an embodiment of the present invention, the sealing unit includes an annular airbag 17; straight pipes 171 are internally threadedly connected to both the upper pressing head 12 and the lower pressing head 13; the annular airbag 17 is fixedly connected to the surface of the straight pipe 171; the annular airbag 17 is connected to the air blower 16 through a spring hose 172.

[0028] As an embodiment of the present invention, an air passage 173 communicating with the annular airbag 17 is provided inside the straight pipe 171; a groove 174 communicating with the air passage 173 is provided on the surface of the straight pipe 171; an air hole 175 is provided inside the lower pressing head 13; one end of the air hole 175 is connected to the spring hose 172, and the other end is communicated with the groove 174.

[0029] As an embodiment of the present invention, an annular groove 176 is provided on the outer wall of the annular airbag 17.

[0030] During operation, when the lower pressing head 13 rises, the lower pressing head 13 drives the straight pipe 171 close to the filter, so that the outlet of the filter is inserted into the air outlet 131 of the lower pressing head 13, and the straight pipe 171 in the air outlet 131 is inserted into the outlet of the filter. At this time, the air blower 16 is controlled to operate. Since a solenoid valve is installed in the spring hose 172, by controlling the solenoid valve to open, the air blower 16 can deliver air into the spring hose 172, so that the air entering the spring hose 172 can flow into the air hole 175 communicated therewith through the solenoid valve, so that the air flows into the air passage 173 communicated with the groove 174 through the air hole 175 and the groove 174, so that the air entering the air passage 173 can flow into the annular airbag 17, so that the annular airbag 17 is inflated and bulged. By setting the annular airbag 17 to be made of polyurethane material, after the annular airbag 17 is inflated and bulged, continue to inflate the annular airbag 17, so that the annular airbag 17 can continue to bulge and extend outwards, so that the extended annular airbag 17 can be closely attached to the inner wall of the filter inlet, so that the annular airbag 17 can seal the inlet of the filter. By providing an annular groove 176 on the outer wall of the annular airbag 17, the annular groove 176 can increase the friction force between the annular airbag 17 and the inner wall of the filter inlet, ensure that the annular airbag 17 can be in closer contact with the pipe wall, thereby providing more contact points, increasing the reliability of the seal, and further reducing the risk of gas leakage. When the hydraulic push rod 141 pushes the lower pressing head 13 to rise, so that the lower pressing head 13 drives the filter to the upper pressing head 12, the inlet of the filter is inserted into the air inlet 121 of the upper pressing head 12, so that the straight pipe 171 in the air inlet 121 is inserted into the inlet of the filter, and the air blower 16 delivers gas into the annular airbag 17 on the surface of the straight pipe 171, so that the annular airbag 17 in the inlet seals the gap between the straight pipe 171 and the inner wall of the inlet.

[0031] Since the inlet and outlet diameters of filters of different models are not the same, by setting the straight pipe 171 to be threadedly connected inside the upper pressing head 12 and the lower pressing head 13, the user can replace the straight pipe 171 with different diameters, so that the straight pipes 171 with different diameters can adapt to the inlets and outlets of filters of different models. In addition, if the annular airbag 17 is worn, the user can also replace the annular airbag 17 by replacing the straight pipe 171 with a different diameter, so as to ensure that the complete annular airbag 17 can seal the gap between the straight pipe 171 and the inner wall of the inlet, thereby improving the service life of the present invention.

[0032] As an embodiment of the present invention, a tightening groove 132 is formed on the surface of the lower pressing head 13; a tightening rod 133 is slidably connected in the tightening groove 132; a magnetic block 134 is fixedly connected to the surface of the tightening rod 133; and electromagnetic plates 135 are inlaid on the inner walls of the air inlet 121 and the air outlet 131.

[0033] As an embodiment of the present invention, a tightening block 136 is fixedly connected to one end of the tightening rod 133 away from the tightening groove 132; and there are two sets of upper and lower tightening rods 133.

[0034] During operation, since the diameter of the outlet end of the filter is smaller than the diameter of the air outlet 131 of the lower pressing head 13, and the outer surface of the filter is mostly an arc surface, the blocking rod 25 cannot stably support the filter to a vertical state through the arc surface of the filter. Therefore, when the outlet of the filter is inserted into the air outlet 131 of the lower pressing head 13, the filter will tilt to a certain extent, which not only causes the straight pipe 171 to not be completely inserted into the outlet of the filter, but also causes the outlet of the filter to not be aligned with the straight pipe 171 in the lower pressing head 13, resulting in the straight pipe 171 in the upper pressing head 12 being stably inserted into the inlet of the filter, thereby affecting the effective sealing of the gap between the straight pipe 171 and the inner wall of the filter inlet or outlet by the annular airbag 17. To this end, the present invention is provided with a tightening rod 133. When the outlet of the filter is inserted into the air outlet 131 of the lower pressing head 13, the electromagnetic plate 135 is controlled to be energized, so that the electromagnetic plate 135 generates the same magnetic pole as the magnetic block 134, so that the magnetic block 134 moves away from the electromagnetic plate 135 under the push of the magnetic repulsive force, so that the magnetic block 134 drives the tightening rod 133 to approach the outlet of the filter, so that the end of the filter inserted into the air outlet 131 can be pushed by the tightening rod 133, so that the surrounding tightening rods 133 can push the filter into a vertical and stable state to ensure that the straight pipe 171 can be stably inserted into the filter. The setting of the tightening block 136 is used to increase the contact area between the tightening rod 133 and the filter and reduce the frictional damage between the tightening rod 133 and the filter; and the setting of two sets of tightening rods 133 enables the two sets of tightening rods 133 to provide uniform driving force, making the process of the filter returning to the vertical state more stable.

[0035] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A disposable medical breathing filter element detection device, comprising an operating table (1) and a tester body (11) installed on the upper end of the operating table (1); characterized in that: There are two clamping mechanisms installed between the operation table (1) and the tester body (11); the clamping mechanism includes an upper pressure head (12) and a lower pressure head (13); the upper pressure head (12) is fixedly connected to the tester body (11); an air inlet (121) communicating with the tester body (11) is opened at the lower end of the upper pressure head (12); an installation groove (14) is opened at the upper end of the operation table (1); the lower pressure head (13) is connected in the installation groove (14) through a hydraulic push rod (141); an air outlet (131) is opened at the upper end of the lower pressure head (13); a particle counter (15) is installed inside the operation table (1); the particle counter (15) is connected to the air outlet (131) through a corrugated pipe (151); an installation frame (2) is arranged between the operation table (1) and the tester body (11); two rollers (21) are rotatably connected to one side of the installation frame (2); a belt drive connection is carried out between the two rollers (21) through a transmission belt (22); a drive motor (23) connected to the roller (21) is fixedly installed on one side of the installation frame (2); a blower (16) is installed on the upper end of the tester body (11). A sealing unit, the sealing unit is installed in the upper pressure head (12) and the lower pressure head (13); the sealing unit is used for clamping the breathing filter.

2. The disposable medical respiratory filter element detection device according to claim 1, wherein: A screw rod (24) in screw drive connection with the installation frame (2) is arranged below the roller (21); the threads at both ends of the screw rod (24) are arranged in opposite directions; the two installation frames (2) are distributed at both ends of the screw rod (24); one end of the screw rod (24) is rotatably connected to the operation table (1), and the other end is rotatably connected to the tester body (11); sealing rings are fixedly connected to the mutually approaching ends of the upper pressure head (12) and the lower pressure head (13).

3. The disposable medical breathing filter element detection device according to claim 2, characterized in that: A blocking rod (25) is arranged above the transmission belt (22); an electric push rod (26) is fixedly connected to the upper end of the blocking rod (25); the end of the electric push rod (26) far from the blocking rod (25) is slidably connected to the tester body (11) through a slider (27); a lead screw (28) is threadedly connected to the lower end of the slider (27).

4. The disposable medical breathing filter element detection device according to claim 3, wherein: The sealing unit includes an annular air bag (17); straight pipes (171) are threadedly connected inside the upper pressure head (12) and the lower pressure head (13); the annular air bag (17) is fixedly connected to the surface of the straight pipe (171); the annular air bag (17) is connected to the blower (16) through a spring hose (172).

5. The disposable medical breathing filter element detection device according to claim 4, characterized in that: An air passage (173) communicating with the annular air bag (17) is opened inside the straight pipe (171); a groove (174) communicating with the air passage (173) is opened on the surface of the straight pipe (171); an air hole (175) is opened inside the lower pressure head (13); one end of the air hole (175) is connected to the spring hose (172), and the other end is connected to the groove (174).

6. The disposable medical breathing filter element detection device according to claim 5, wherein: An annular groove (176) is opened on the outer ring wall of the annular air bag (17).

7. The disposable medical respiratory filter element detection device according to claim 6, characterized in that: The surface of the pressing head (13) is provided with a tightening groove (132); a tightening rod (133) is slidably connected in the tightening groove (132); a magnetic block (134) is fixedly connected to the surface of the tightening rod (133); electromagnetic plates (135) are inlaid on the inner walls of the air inlet (121) and the air outlet (131).

8. The disposable medical respiratory filter element detection device according to claim 7, characterized in that: One end of the tightening rod (133) away from the tightening groove (132) is fixedly connected with a tightening block (136); two sets of the tightening rods (133) are arranged up and down.

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