CN115979828A - Instrument and method for testing performance of liquid medicine filter - Google Patents
Instrument and method for testing performance of liquid medicine filter Download PDFInfo
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- CN115979828A CN115979828A CN202310062478.6A CN202310062478A CN115979828A CN 115979828 A CN115979828 A CN 115979828A CN 202310062478 A CN202310062478 A CN 202310062478A CN 115979828 A CN115979828 A CN 115979828A
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Abstract
The invention relates to an instrument for testing the performance of a liquid medicine filter, which is used for testing the bubble point pressure and the exhaust hole water penetration pressure of the liquid medicine filter, and comprises a host, a water supply and drainage mechanism, an air supply mechanism, a switch control mechanism, a PLC (programmable logic controller) control module and a test sample connector, wherein the water supply and drainage mechanism is arranged on the host; the air supply mechanism is arranged on the host; the two ends of the switch control mechanism are respectively connected with the water supply and drainage mechanism and the air supply mechanism, the test sample joint is provided with an upper channel joint and a lower channel joint, and the upper channel joint and the lower channel joint are both connected with the switch control mechanism; the PLC control module is installed in the host, and the water supply and drainage mechanism, the air supply mechanism and the switch control mechanism are all electrically connected with the PLC control module. The invention also relates to a method for testing the performance of the liquid medicine filter. The invention tests the bubble point pressure and the water penetration pressure of the exhaust hole of the liquid medicine filter, has high automation degree and simple operation, and belongs to the field of liquid medicine filter performance test instruments.
Description
Technical Field
The invention relates to the field of liquid medicine filter performance testing instruments, in particular to an instrument and a method for testing the performance of a liquid medicine filter.
Background
The disposable liquid medicine filter is a fitting of an infusion pipe such as an infusion apparatus, a connecting pipe, an infusion pump, an injector and the like, and is used for filtering impurities, foreign matters, particles, microorganisms and the like in liquid medicine. When a patient receives intravenous infusion clinically, particles, microorganisms and the like in the environment can enter an infusion system due to factors such as environment, manual operation and the like, so that infusion complications can be caused, and further, the life safety problem can be caused.
The filters are classified according to the pore size designation of the filter membrane (also called filter medium), with different pore sizes representing different filtration performance. For a filter with the nominal aperture being more than or equal to 1.2 mu m, the filtering performance of the filter is directly judged through the filtering rate; and for the filter with the nominal pore diameter less than or equal to 0.45 mu m, whether the filtering membrane of the filter meets the requirement or not is judged by testing the bubble point pressure of the filter.
The bubble point pressure is the critical pressure value at which the filter to be pretreated filled with water is pressurized, and as the pressure increases, the first bubble appears in the filter and bubbles continue to appear. If a filter as a whole is capable of withstanding bubble point pressure and passes the bubble point pressure test, it is shown that the filter not only has satisfactory filter membrane integrity, but also has satisfactory assembly integrity.
The water penetration pressure of the filter means that a certain pressure is applied to the filter with the air vent, and whether the air filtering membrane at the air vent is drained or not is observed. If water is discharged, the performance of the filter cannot meet the requirement, liquid medicine can be leaked out in the process of clinical transfusion, and the life safety of a patient can be seriously threatened.
No matter the bubble point pressure and the water penetration pressure of the exhaust hole, the test is carried out while observing in the test process, and in the case, operation delay is easy to generate, so that the observed data and the actual data have large errors. The manual operation mode of the conventional industry may also require two persons to participate in the test at the same time, which wastes manpower. The bubble point pressure and the water penetration pressure of the exhaust hole are very important performance indexes of the liquid medicine filter, and the method has practical significance for simply, conveniently and accurately testing the two indexes.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the instrument and the method for testing the performance of the liquid medicine filter solve the problem that in the prior art, no matter bubble point pressure and exhaust hole water penetration pressure, the test is carried out while observation is needed in the test process, operation delay is easy to generate under the condition, and the observed data and actual data have large errors. The conventional manual operation mode in the industry may also require two persons to participate in the test at the same time, which is very labor-wasting.
In order to achieve the purpose, the invention adopts the following technical scheme:
an instrument for testing the performance of a liquid medicine filter is used for testing the bubble point pressure and the water penetration pressure of an exhaust hole of the liquid medicine filter, and comprises a host, a water supply and drainage mechanism, an air supply mechanism, a switch control mechanism, a PLC (programmable logic controller) control module and a test sample connector, wherein the water supply and drainage mechanism is arranged on the host and used for providing water required by the test; the air supply mechanism is arranged on the host machine and used for supplying test air; the two ends of the switch control mechanism are respectively connected with the water supply and drainage mechanism and the air supply mechanism, the test sample joint is provided with an upper channel joint and a lower channel joint, and the upper channel joint and the lower channel joint are both connected with the switch control mechanism; the PLC control module is installed in the host, and the water supply and drainage mechanism, the air supply mechanism and the switch control mechanism are all electrically connected with the PLC control module.
As a preferred, supply drainage mechanism to include basin, peristaltic pump and water pump, the basin is installed on the host computer, and the basin main part is inside the host computer, and the basin mouth is at the host computer top, and peristaltic pump and water pump all pass through pipeline and basin connection, and the peristaltic pump passes through the pipeline and is connected with on-off control mechanism, and the host computer is equipped with the outlet, and the outlet is located one side of host computer, and the water pump passes through pipeline and outlet connection, and peristaltic pump and water pump all with PLC control module electric connection.
As a preferred, air feed mechanism includes pressure sensor and air supply interface, and air supply interface sets up in one side of host computer, and air supply interface is used for being connected with outside air supply, and air supply interface passes through the pipeline and pressure sensor is connected, and pressure sensor passes through the pipeline and is connected with on-off control mechanism, pressure sensor and PLC control module electric connection.
Preferably, the switch control mechanism comprises a first electromagnetic switch valve, a second electromagnetic switch valve, a third electromagnetic switch valve, a fourth electromagnetic switch valve and an infrared induction switch, wherein two ends of the first electromagnetic switch valve are respectively connected with the peristaltic pump and the upper channel joint through pipelines; two ends of the second electromagnetic switch valve are respectively connected with the pressure sensor and the upper channel joint through pipelines; two ends of the third electromagnetic switch valve are respectively connected with the peristaltic pump and the lower channel joint through pipelines; two ends of the fourth electromagnetic switch valve are respectively connected with the pressure sensor and the lower channel joint through pipelines; the infrared induction switch is installed on the host computer, and first electromagnetic switch valve, second electromagnetic switch valve, third electromagnetic switch valve, fourth electromagnetic switch valve and infrared induction switch all with PLC control module electric connection.
Preferably, the test sample joint comprises an upper channel joint and a lower channel joint, the upper channel joint is fixed on the host machine through an upper channel clamp, and the upper channel joint is used for testing the water penetration pressure of the exhaust hole of the filter; the lower channel joint is fixed on the host machine through a lower channel clamp, and the lower channel is used for testing the bubble point pressure of the filter; the upper channel joint and the lower channel joint are positioned in the same vertical direction, and the upper channel clamp and the lower channel clamp are connected to form an upper channel clamp and a lower channel clamp.
Preferably, a movable water tank is provided below the upper and lower passage jigs.
Preferably, the water tank is movably connected with a water tank cover.
Preferably, the host computer is provided with an operation screen, a power switch and a printer, and the operation screen, the power switch and the printer are electrically connected with the PLC control module.
A method for performance testing of a medical fluid filter, using an apparatus for performance testing of a medical fluid filter, the method comprising the steps of, S1: purified water for testing is injected into the water tank, the power connector and an external power supply are connected, and an external air source and an air source interface are connected; s2: connecting the two filters to be tested to the upper channel joint and the lower channel joint respectively, and starting to test the bubble point pressure and the exhaust hole water penetration pressure respectively; s3: and (4) observing the condition of the filter in the test process to judge whether the filter to be tested is qualified or not, and printing the result by a printer.
Preferably, in step S2, the step of testing the bubble point pressure is: filling water into the filter to be tested through a peristaltic pump until the filter to be tested is full of water and water flows out stably, wherein the filter to be tested with air holes needs to be plugged; inputting gas from a pressure sensor into a filter to be tested, observing that a first bubble is generated until a continuous bubble is generated in the filter to be tested, recording a bubble point pressure value of the filter to be tested, comparing the recorded bubble point pressure value with a standard specified value to obtain a conclusion whether the filter to be tested is qualified, and printing a result through a printer; the steps for testing the water penetration pressure of the vent hole comprise: filling water into the filter to be tested through the peristaltic pump until the filter to be tested is full of water and water stably flows out, inputting gas from the pressure sensor into the filter to be tested until the test pressure is reached, observing whether water flows out of the exhaust holes of the filter to be tested, judging whether the filter to be tested is qualified or not according to whether water flows out of the exhaust holes of the filter to be tested, and printing the result through the printer.
In summary, the present invention has the following advantages:
(1) The function is comprehensive, one instrument can carry out the test of the bubble point pressure and the water penetration pressure of the exhaust hole of the filter, and the cost of a user can be reduced;
(2) The accuracy is high, the test can be stopped quickly by simply waving the hand through the infrared induction switch, the test result is obtained, the response is sensitive compared with the general manual operation, and the result accuracy is higher;
(3) The device has a timing function, retention time is set before the test is started, the test is automatically stopped when the requirement is met, and no additional manual intervention is needed;
(4) The operation is simple and convenient, other processes except the sample installation link can be realized by operating the screen, and the operation workload is reduced;
(5) The automation degree is high, the test data can be displayed, fed back and recorded in real time, and the result can be printed and output.
Drawings
Fig. 1 is a perspective view of an apparatus for testing performance of a liquid medicine filter.
Fig. 2 is a schematic diagram of the internal structure of an apparatus for testing the performance of a liquid medicine filter.
FIG. 3 is a front view of the apparatus with the filter under test attached to the lower channel connection.
FIG. 4 is a front view of the instrument with the filter under test attached to the upper channel fitting.
The system comprises a host, an operation screen, a power switch, a movable water tank, a 6-air source interface, a 7-water outlet, an 8-infrared induction switch, a 9-pipeline clamp, a 10-upper and lower channel clamp, an 11-switching pipeline, a 12-switching valve, a 13-quick adapter, a 14-upper channel joint, a 15-lower channel joint, a 16-printer, a 17-lower channel filter to be tested, an 18-upper channel filter to be tested, a 19-pressure sensor, a 20-water pump, a 21-first electromagnetic switching valve, a 22-second electromagnetic switching valve, a 23-third electromagnetic switching valve, a 24-fourth electromagnetic switching valve and a 25-peristaltic pump.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
As shown in fig. 1-2, the present embodiment provides an apparatus for testing performance of a liquid medicine filter, which specifically includes a host 1, a water supply and drainage mechanism, an air supply mechanism, a switch control mechanism, a PLC control module, and a test sample connector. The host 1 is provided with an operation screen 2, a power switch 3 and a printer 16, and the operation screen 2, the power switch 3 and the printer 16 are all electrically connected with the PLC control module.
The water supply and drainage mechanism comprises a water tank 5, a peristaltic pump 25 and a water pump 20, the water tank 5 is installed on the host 1, a water tank main body is arranged inside the host, a water tank opening is formed in the top of the host, the peristaltic pump 25 and the water pump 20 are connected with the water tank 5 through a pipeline, the peristaltic pump 25 is connected with the switch control mechanism through a pipeline, the host 1 is provided with a water outlet 7, the water outlet 7 is located on one side of the host 1, and the water pump 20 is connected with the water outlet 7 through a pipeline. A movable water tank 5 cover is arranged on the water tank 5 to prevent foreign matters from falling into the water tank 5 in the test process to influence the test result. The peristaltic pump 25 is capable of delivering water from the reservoir 5 to the test sample junction and then providing the required test water to the test sample. The water pump 20 can discharge the water in the water tank 5 through the water discharge port 7, and after the test is completed, the water remaining in the water tank 5 is emptied. The peristaltic pump 25 and the water pump 20 are both electrically connected with the PLC control module.
The air supply mechanism comprises a pressure sensor 19 and an air source interface 6, the air source interface 6 is arranged on one side of the host 1, the air source interface 6 is used for being connected with an external air source, the air source interface 6 is connected with the pressure sensor 19 through a pipeline, and the pressure sensor 19 is connected with the switch control mechanism through a pipeline. An external air source is connected with the air source interface 6 through a pipeline to provide test air, and the pressure sensor 19 is connected with the air source interface 6 through a pipeline to feed back pressure data to the operation screen 2 in real time. The pressure sensor 19 is electrically connected with the PLC control module.
The switch control mechanism comprises a first electromagnetic switch valve 21, a second electromagnetic switch valve 22, a third electromagnetic switch valve 23, a fourth electromagnetic switch valve 24 and an infrared induction switch 8, wherein two ends of the first electromagnetic switch valve 21 are respectively connected with a peristaltic pump 25 and an upper channel joint 14 through pipelines; two ends of the second electromagnetic switch valve 22 are respectively connected with the pressure sensor 19 and the upper channel joint 14 through pipelines; two ends of the third electromagnetic switch valve 23 are respectively connected with the peristaltic pump 25 and the lower channel joint 15 through pipelines; the both ends of fourth electromagnetic switch valve are connected with pressure sensor 19 and lower passageway joint 15 through the pipeline respectively, and infrared inductive switch 8 installs on host 1, and first electromagnetic switch valve 21, second electromagnetic switch valve 22, third electromagnetic switch valve 23, fourth electromagnetic switch valve 24 and infrared inductive switch 8 all with PLC control module electric connection. The first and second electromagnetic opening/ closing valves 21 and 22 control the water and air intake of the upper channel joint 14, and the third and fourth electromagnetic opening/ closing valves 23 and 24 control the water and air intake of the lower channel joint 15. The infrared inductive switch 8 realizes the stop test function by controlling the electromagnetic switch valve. The first electromagnetic switch valve 21, the second electromagnetic switch valve 22, the third electromagnetic switch valve 23, the fourth electromagnetic switch valve 24 and the infrared induction switch 8 are electrically connected with the PLC control module. The specific process is described by taking the above channel as an example, before the test starts, all the electromagnetic switch valves are in a closed state, the upper channel is selected through the operation screen, and the third electromagnetic switch valve 23 and the fourth electromagnetic switch valve 24 of the lower channel cannot be opened in the whole test process; clicking a water injection button of the operation screen, opening a first electromagnetic switch valve 21, starting a peristaltic pump 25, enabling a water pump in a water tank to flow to a channel connector 14, enabling water to flow to a test sample, stopping water injection through the operation screen, and closing the first electromagnetic switch valve 21; at this moment, click the button that steps up on the operation screen, second electromagnetic switch valve 22 opens, and gaseous sample that gets into through last channel joint 14 and awaits measuring waits to reach the test requirement, waves one time hand in infrared induction switch department fast, and infrared induction switch is with signal transmission to PLC control module, and PLC control module closes second electromagnetic switch valve 22, and the test stops.
The upper channel fitting 14 was used to test the filter vent water breakthrough pressure and the lower channel fitting 15 was used to test the filter bubble point pressure.
The PLC control module controls the pressure sensor 19, the peristaltic pump 25, the water pump 20, the first electromagnetic switch valve 21, the second electromagnetic switch valve 22, the third electromagnetic switch valve 23, the fourth electromagnetic switch valve 24 and the infrared induction switch 8, and the control process of the PLC control module is realized through the operation screen 2. The pressure sensor 19, the peristaltic pump 25, the water pump 20, the first electromagnetic switch valve 21, the second electromagnetic switch valve 22, the third electromagnetic switch valve 23, the fourth electromagnetic switch valve 24 and the infrared induction switch 8 are electrically connected with the PLC control module.
The test sample joint comprises an upper channel joint 14 and a lower channel joint 15, the upper channel clamp and the lower channel clamp are connected to form an upper channel clamp and a lower channel clamp, the upper channel joint 14 is fixed on the host 1 through the upper channel clamp and the lower channel clamp, and the upper channel joint 14 is used for testing the water penetration pressure of the exhaust hole of the filter; the lower channel joint 15 is fixed on the host 1 through an upper channel clamp and a lower channel clamp, and the lower channel is used for testing the bubble point pressure of the filter; the upper channel connection 14 and the lower channel connection 15 are in the same vertical direction. A movable water tank 4 is arranged below the upper channel fixing clamp and the lower channel fixing clamp and used for collecting water discharged in the test process, so that an instrument and a test table top cannot be polluted and the water can be poured conveniently after the test is finished. In this embodiment, the upper channel joint 14 and the lower channel joint 15 are installed on the upper channel fixture 10 and the lower channel fixture 10, the pipeline fixture 9 is fixedly installed above the upper channel fixture 10, the pipeline fixture 9 is used for fixing a pipeline for testing, the fixing fixture is provided with a switch valve 12, the switch valve controls opening and closing of the switch pipeline 11, and the switch pipeline 11 is connected with a quick adapter 13.
The embodiment provides a method for testing the performance of a liquid medicine filter, which utilizes an instrument for testing the performance of the liquid medicine filter and comprises the following specific steps:
before the test, the cover of the water tank was opened, purified water for the test was manually poured into the water tank, and the cover was closed. The instrument is electrified through the power switch 3, an external air source is connected with the air source interface 6 through a pipeline to supply air to the instrument, and the following description is respectively given according to specific test items.
Bubble point pressure test (see figure 3):
the lower channel is used for testing bubble point pressure, and the filter 17 to be tested of the lower channel is connected to the lower channel joint 15, and the connection is finished. The lower channel is selected through the operation screen 2, and the first electromagnetic switch valve 21 and the second electromagnetic switch valve 22 of the upper channel cannot be opened in the whole testing process; clicking a water injection button of the operation screen, opening the third electromagnetic switch valve 23, starting the peristaltic pump 25, connecting the water pump in the water tank to the lower channel connector 15, enabling water to flow to the filter to be tested 17 of the lower channel, stopping water injection through the operation screen when the filter to be tested 17 of the lower channel is full of water and water stably flows out, and closing the third electromagnetic switch valve 23; to the filter that has the gas pocket, will block up the gas pocket, then, click the button that steps up on the operation screen, fourth electromagnetic switch valve 24 opens, gas gets into the sample that awaits measuring through lower channel joint, need observe the bubble in the lower channel filter 17 that awaits measuring this moment, until there is first bubble to when having continuous bubble to produce, wave the hand in infrared induction switch 8 department fast, infrared induction switch 8 is with signal transmission to PLC control module, PLC control module control closes fourth electromagnetic switch valve 24, the test stops at once, the operation screen main interface can show the bubble point pressure of filter. The bubble point pressure is greater than a specified value, and the filter is qualified; the bubble point pressure is less than the specified value and the filter is rejected. The test results may be output by the printer 16.
Vent water penetration pressure test (see figure 4):
the upper channel is used for testing the penetration pressure of water in the exhaust hole, the water inlet of the upper channel filter to be tested 18 with the exhaust hole is connected with the upper channel joint, the water outlet of the upper channel filter to be tested 18 is connected with the switch pipeline 11 through the quick adapter 13, and the switch valve 12 on the pipeline clamp 9 is opened. The upper channel is selected through the operation screen, and the third electromagnetic switch valve 23 and the fourth electromagnetic switch valve 24 of the lower channel cannot be opened in the whole test process; clicking a water injection button of an operation screen, opening a first electromagnetic switch valve 21, starting a peristaltic pump 25, enabling a water pump in a water tank to flow to a channel connector 14, enabling water to flow to a test sample, stopping water injection through the operation screen when water flows out stably from a tail pipe of a switching pipeline 11, closing the first electromagnetic switch valve 21, and manually closing a switch valve 12; at the moment, a pressure limiting value and a holding time are set on a screen, a pressure boosting button is clicked, the second electromagnetic switch valve 22 is opened, gas enters the sample to be tested through the upper channel connector, and after the testing pressure is reached, whether water overflows from the vent hole of the filter 18 to be tested of the upper channel is observed. If not, the test is automatically stopped after the retention time is reached, and the filter is qualified; if water emerges, a hand is quickly waved at the infrared induction switch, the infrared induction switch transmits a signal to the PLC control module, the PLC control module closes the second electromagnetic switch valve 22, the test is stopped, and the filter is unqualified. The test results may be output by the printer 16.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (10)
1. An instrument for testing the performance of a liquid medicine filter, which is used for testing the bubble point pressure and the water penetration pressure of an exhaust hole of the liquid medicine filter, is characterized in that: the instrument comprises a host, a water supply and drainage mechanism, an air supply mechanism, a switch control mechanism, a PLC (programmable logic controller) control module and a test sample connector, wherein the water supply and drainage mechanism is arranged on the host and is used for providing water required by the test; the air supply mechanism is arranged on the host machine and used for supplying test air; the two ends of the switch control mechanism are respectively connected with the water supply and drainage mechanism and the air supply mechanism, the test sample joint is provided with an upper channel joint and a lower channel joint, and the upper channel joint and the lower channel joint are both connected with the switch control mechanism; the PLC control module is installed in the host, and the water supply and drainage mechanism, the air supply mechanism and the switch control mechanism are all electrically connected with the PLC control module.
2. An apparatus for performance testing of a medical fluid filter, as defined in claim 1, wherein: supply drainage mechanism to include basin, peristaltic pump and water pump, the basin is installed on the host computer, and the basin main part is inside the host computer, and the basin mouth is at the host computer top, and peristaltic pump and water pump all are connected through pipeline and basin, and the peristaltic pump passes through the pipeline and is connected with on-off control mechanism, and the host computer is equipped with the outlet, and the outlet is located one side of host computer, and the water pump passes through pipeline and outlet connection, and peristaltic pump and water pump all with PLC control module electric connection.
3. An apparatus for performance testing of a medical fluid filter, as defined in claim 1, wherein: the air supply mechanism comprises a pressure sensor and an air source interface, the air source interface is arranged on one side of the host machine and is used for being connected with an external air source, the air source interface is connected with the pressure sensor through a pipeline, the pressure sensor is connected with the switch control mechanism through a pipeline, and the pressure sensor is electrically connected with the PLC control module.
4. An apparatus for performance testing of a medical liquid filter according to claim 3 wherein: the switch control mechanism comprises a first electromagnetic switch valve, a second electromagnetic switch valve, a third electromagnetic switch valve, a fourth electromagnetic switch valve and an infrared induction switch, wherein two ends of the first electromagnetic switch valve are respectively connected with the peristaltic pump and the upper channel joint through pipelines; two ends of the second electromagnetic switch valve are respectively connected with the pressure sensor and the upper channel joint through pipelines; two ends of the third electromagnetic switch valve are respectively connected with the peristaltic pump and the lower channel joint through pipelines; two ends of the fourth electromagnetic switch valve are respectively connected with the pressure sensor and the lower channel joint through pipelines; infrared induction switch installs on the host computer, first electromagnetic switch valve, second electromagnetic switch valve, third electromagnetic switch valve, fourth electromagnetic switch valve and infrared induction switch all with PLC control module electric connection.
5. An apparatus for performance testing of a medical fluid filter according to claim 4, wherein: the test sample joint comprises an upper channel joint and a lower channel joint, the upper channel joint is fixed on the host machine through an upper channel clamp, and the upper channel joint is used for testing the water penetration pressure of the exhaust hole of the filter; the lower channel joint is fixed on the host machine through a lower channel clamp, and the lower channel is used for testing the bubble point pressure of the filter; the upper channel joint and the lower channel joint are positioned in the same vertical direction, and the upper channel clamp and the lower channel clamp are connected to form an upper channel clamp and a lower channel clamp.
6. An apparatus for performance testing of a medical fluid filter, as defined in claim 5, wherein: a movable water tank is arranged below the upper channel clamp and the lower channel clamp.
7. An apparatus for performance testing of a medical fluid filter, as defined in claim 1, wherein: the water tank is movably connected with a water tank cover.
8. An apparatus for performance testing of a medical fluid filter, as defined in claim 1, wherein: the host computer has operation screen, switch and printer, and operation screen, switch and printer all with PLC control module electric connection.
9. A method for testing the performance of a liquid medicine filter is characterized by comprising the following steps: use of an apparatus for liquid medicine filter performance testing according to any one of claims 1-8, the method comprising the steps of,
s1: purified water for testing is injected into the water tank, the power connector and an external power supply are connected, and an external air source and an air source interface are connected;
s2: connecting the two filters to be tested to the upper channel joint and the lower channel joint respectively, and starting to test the bubble point pressure and the exhaust hole water penetration pressure respectively;
s3: and (4) observing the condition of the filter in the test process to judge whether the filter to be tested is qualified or not, and printing the result by a printer.
10. A method for performance testing of a medical fluid filter, as defined in claim 9, wherein: in the step S2, the process is carried out,
the bubble point pressure test method comprises the following steps: filling water into the filter to be tested through a peristaltic pump until the filter to be tested is full of water and water flows out stably, wherein the filter to be tested with air holes needs to be plugged; inputting gas from a pressure sensor into a filter to be tested, observing that a first bubble is generated until a continuous bubble is generated in the filter to be tested, recording a bubble point pressure value of the filter to be tested, comparing the recorded bubble point pressure value with a standard specified value to obtain a conclusion whether the filter to be tested is qualified, and printing a result through a printer;
the steps for testing the water penetration pressure of the vent hole comprise: filling water into the filter to be tested through the peristaltic pump until the filter to be tested is full of water and water stably flows out, inputting gas from the pressure sensor into the filter to be tested until the test pressure is reached, observing whether water flows out of the exhaust holes of the filter to be tested, judging whether the filter to be tested is qualified or not according to whether water flows out of the exhaust holes of the filter to be tested, and printing the result through the printer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310062478.6A CN115979828A (en) | 2023-01-18 | 2023-01-18 | Instrument and method for testing performance of liquid medicine filter |
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| CN202310062478.6A CN115979828A (en) | 2023-01-18 | 2023-01-18 | Instrument and method for testing performance of liquid medicine filter |
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