CN108106786B - Detection device for biological safety filter - Google Patents
Detection device for biological safety filter Download PDFInfo
- Publication number
- CN108106786B CN108106786B CN201810090413.1A CN201810090413A CN108106786B CN 108106786 B CN108106786 B CN 108106786B CN 201810090413 A CN201810090413 A CN 201810090413A CN 108106786 B CN108106786 B CN 108106786B
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- tube
- filter
- biosafety
- detection
- sampling head
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- 238000001514 detection method Methods 0.000 title claims abstract description 60
- 238000005070 sampling Methods 0.000 claims abstract description 74
- 230000005540 biological transmission Effects 0.000 claims abstract description 49
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 31
- 241000894006 Bacteria Species 0.000 claims description 8
- 241000233866 Fungi Species 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000249 desinfective effect Effects 0.000 claims description 2
- 230000000737 periodic effect Effects 0.000 claims description 2
- 238000009423 ventilation Methods 0.000 claims description 2
- 230000001954 sterilising effect Effects 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000700605 Viruses Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The embodiment of the invention discloses a detection device for a biosafety filter, which comprises a shell, a mounting frame, a movement part and a detection and control part; the shell is of a hollow structure, the air inlet and the air outlet are open, the air inlet can be provided with a biological safety filter, and the mounting frame is parallel to the biological safety filter; the motion part comprises a transmission chain with the middle section periodically arranged in a reciprocating manner and the starting and ending sections are closed, and a driving wheel arranged at each inflection point of the transmission chain, the sampling head is fixed on the transmission chain through a mounting seat, one end of the sampling tube is communicated with a hollow structure of the sampling head, and the other end of the sampling tube is communicated with the rear end detection tube; the detection and control part comprises a host machine and a detector which is connected with the host machine in a communication way. The device provided by the invention has high automation level, can divide the filter into a plurality of parts, detect whether leakage points exist one by one, can determine the specific positions of the leakage points, can return to detect suspected leakage points again, and can generate detailed detection reports.
Description
Technical Field
The invention relates to the field of filter detection devices, in particular to a detection device for a biosafety filter.
Background
Since biosafety laboratory is made, serious biosafety accidents caused by design and construction quality of protection facilities occur in time, the high-efficiency filter is laboratory emission filtering equipment commonly used at present, the appearance of the high-efficiency filter is cuboid, the high-efficiency filter is provided with a filtering hole for air supply to pass through, viruses and harmful bacteria are often present in the laboratory, so the high-efficiency filter is often required to be disinfected, the leak detection equipment of the high-efficiency filter is quite behind, the operation safety of the high-efficiency filter cannot be guaranteed, the existing leak detection equipment is usually formed by connecting one row or one row of sampling heads in parallel, the parallel sampling heads are manually and transversely or vertically repeatedly detected along the rear of the high-efficiency filter, time and labor are wasted, the information such as the position of a leakage point, the leakage quantity and the like cannot be accurately determined, and the harm to operators is also larger.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a detection device for a biosafety filter, which is characterized by comprising a shell capable of mounting the biosafety filter, a mounting frame arranged in the shell, a moving part arranged on the mounting frame and a detection and control part for controlling equipment and detecting air quality;
the shell is of a hollow structure, the air inlet and the air outlet are open, the biological safety filter can be installed at the air inlet, and a rear end detection pipe, a disinfection pipe and a disinfection authentication pipe are arranged through the outer wall of the shell;
the mounting frame is provided with a hollow structure in the middle and is parallel to the air inlet;
the motion part comprises a transmission chain with the middle section periodically arranged in a reciprocating manner and the starting and ending sections are closed, driving wheels which are arranged at each inflection point of the transmission chain and used for fixing the transmission chain on the mounting frame and guiding the transmission chain, one driving wheel is connected with the motor,
the device comprises a transmission chain, a sampling head, a rear end detection tube, a sampling tube, a rear end detection tube, a transmission chain, a sampling head and a transmission chain, wherein the transmission chain is provided with a mounting seat, the mounting seat is provided with the sampling head with a horn-shaped structure, the sampling head can rotate on the mounting seat by taking an axial lead of the sampling head as an axis, the radius of the flaring end of the sampling head is larger than half of the distance between the transmission chains which are arranged in parallel and adjacent in a periodic manner, one end of the sampling tube is communicated with the sampling head, and the other end of the sampling tube is communicated with the rear end detection tube;
the detection and control part comprises a host machine and a detector which is in communication connection with the host machine, the detector is connected with the rear end detection tube, the detector is used for detecting the air quality after filtering, the host machine equally divides the biosafety filter into a plurality of parts along the movement direction of the transmission chain and controls the motor to operate, so that the sampling head sequentially checks all parts of the biosafety filter, when the sampling head checks the suspected leak point, the host machine can display the position of the leak point and can control the motor to move the sampling head to the suspected leak point for re-detection, and the host machine can output the detected air quality information.
Further, the disinfection authentication tube is arranged at the top of the shell and is close to the vertex angle of the biosafety filter, a valve is arranged on the disinfection authentication tube, a fungus sheet is arranged at one end of the disinfection authentication tube away from the shell, when disinfection is carried out, the valve is opened, and after bacteria in the fungus sheet are killed, the disinfection is confirmed to be completed.
Further, the start and the end of the periodically-reciprocating arrangement part in the middle section of the transmission chain are respectively provided with a photoelectric switch on the inner wall of the shell, the photoelectric switches are in communication connection with the host, and the photoelectric switches are used for detecting whether the sampling head reaches the start and the end.
Further, the sterilizing tube is connected to an external sterilizing device for sterilizing the device.
Further, a pressure detection pipe is further arranged on the outer wall of the shell in a penetrating mode, and the pressure detection pipe is connected with pressure detection equipment and used for detecting wind pressure at an air outlet of the biosafety filter.
Further, the air outlet of the shell is arranged at the top of the shell and is connected with the ventilating duct through a flange.
Further, when the intermediate termination check is performed, the host computer may control the sampling head to return to the starting end along the shortest path on the running path of the transmission chain.
Further, the motor is a stepper motor.
Further, the detector may also detect the temperature and humidity of the air.
Further, the housing is made of stainless steel material.
Advantageous effects
The detection device for the biosafety filter provided by the embodiment of the invention has high automation level, can divide the high-efficiency filter into a plurality of parts, detect whether leakage points exist in each part one by one, can determine the specific positions of the leakage points, can return to detect suspected leakage points again, can generate detailed detection reports, and has the advantages of intelligence, accuracy and safety.
Drawings
FIG. 1 is a front view of an embodiment of a detection device for a biosafety filter of the invention;
FIG. 2 is a left side cross-sectional view of an embodiment of a detection device for a biosafety filter of the invention;
fig. 3 is an enlarged view of a sampling head of an embodiment of a detection device for a biosafety filter of the invention.
Wherein:
11-a housing; 12-an air inlet; 13-an air outlet; 14-sterilizing the authentication tube; 15-a rear end detection tube; 16-sterilizing tubes; 17-a pressure detection tube; 18-mounting frame; 21-a drive chain; 22-a driving wheel; a 23-motor; 24-sampling head; 25-mounting seats; 26-sampling tube; 31-optoelectronic switch.
Description of the embodiments
The technical scheme of the invention is described in detail below.
Examples
A detection device for a biosafety filter, characterized by comprising a housing 11 to which the biosafety filter can be mounted, a mounting frame 18 provided in the housing 11, a moving part provided on the mounting frame 18, and a detection control part for controlling equipment and detecting air quality;
the shell 11 is of a hollow structure, the air inlet 12 and the air outlet 13 are open, the air inlet 12 can be provided with a biosafety filter, and a rear end detection tube 15, a disinfection tube 16 and a disinfection authentication tube 14 are arranged through the outer wall of the shell 11;
the mounting frame 18 has a hollow structure in the middle and is arranged parallel to the air inlet 12;
the motion part comprises a transmission chain 21 with a middle section periodically arranged in a reciprocating manner and a closed start section and a closed end section, and driving wheels 22 arranged at each inflection point of the transmission chain 21 and used for fixing the transmission chain 21 on the mounting frame 18 and providing guidance for the transmission chain 21, wherein one driving wheel 22 is connected with a motor 23,
the transmission chain 21 is provided with a mounting seat 25, the mounting seat 25 is provided with a sampling head 24 with a horn-shaped structure, the sampling head 24 can rotate on the mounting seat 25 by taking an axial lead as an axis, the radius of a flaring end of the sampling head 24 is larger than half of the distance between the parallel and adjacent periodically arranged transmission chains 21, one end of a sampling tube 26 is communicated with the sampling head 24, and the other end of the sampling tube 26 is communicated with the rear end detection tube 15;
the detection and control part comprises a host machine and a detector which is in communication connection with the host machine, the detector is connected with the rear end detection tube 15, the detector is used for detecting the air quality after filtration, the host machine equally divides the biosafety filter into a plurality of parts along the movement direction of the transmission chain 21 and controls the motor 23 to operate, so that the sampling head 24 sequentially inspects all parts of the biosafety filter, when the sampling head 24 inspects suspected leakage points, the host machine can display the positions of the leakage points and can control the motor 23 to move the sampling head 24 to the positions of the suspected leakage points for re-detection, and the host machine can output detected air quality information.
Further, the mounting frame 18 has a mouth-shaped structure and is disposed in parallel with the biosafety filter on a side of the housing 11 near the biosafety filter.
Further, the driving wheel 22 is provided on the side wall of the mounting frame 18 facing the biosafety filter.
Further, the driving wheel 22 includes an upper driving wheel portion, a lower driving wheel portion and a start-end driving wheel portion, wherein the upper driving wheel portion is horizontally aligned on the upper beam of the mounting frame 18, the lower driving wheel portion is horizontally aligned on the lower beam of the mounting frame 18 and is alternately arranged in a penetrating manner with the upper driving wheel portion in a vertical direction, the start-end driving wheel portion includes a start driving wheel and an end-end driving wheel which are horizontally aligned, the start driving wheel is arranged at a lower left corner of the mounting frame 18, a left end of the start driving wheel is vertically aligned with a left end of the leftmost driving wheel 22 of the upper driving wheel portion, and a right end of the end driving wheel is vertically aligned with a right end of the rightmost driving wheel 22 of the upper driving wheel portion.
Further, the driving chain 21 includes a serpentine region and a connection region, the serpentine region cooperates with the upper driving wheel portion and the lower driving wheel portion, each driving wheel 22 of the upper driving wheel portion and the lower driving wheel portion is disposed at each inflection point of the driving chain 21 of the serpentine region, the serpentine region of the driving chain 21 is uniformly disposed on the side wall of the mounting frame 18, the connection region of the driving chain 21 is horizontally disposed and connected to the start point and the end point of the serpentine region, and cooperates with the start driving wheel and the end driving wheel, and the driving chain 21 can move forward or backward on the driving wheels 22.
Further, the sampling head 24 is fixed on the transmission chain 21 through the mounting seat 25, so that the sampling head 24 moves along with the transmission chain 21 on a fixed track under the driving of the motor 23.
Further, the sampling head is clamped on the mounting seat, and the sampling head can rotate on the mounting seat by taking the axial lead of the sampling head as an axis.
Further, the motor 23 is connected to the transmission wheel 22 located in the middle of the lower transmission wheel portion, and drives the other transmission wheels 22 to rotate through the transmission chain 21.
Further, the driving wheel 22 is a gear, and the driving chain 21 is a chain.
Further, the mounting frame 18 is fixed to the inner wall of the housing 11 by bolts and a mounting plate.
Further, the sampling head 24 is in a horn shape, the diameter of one end close to the biosafety filter is larger than that of one end far away from the biosafety filter, the sampling head 24 is rotatably connected with the mounting seat 25, the sampling head 24 can rotate in a vertical plane relative to the mounting seat 25, one end of the sampling tube 26 penetrates through the side wall of the sampling head 24 close to one end of the mounting seat 25, an air suction inlet of the sampling tube 26 is positioned in the hollow structure of the sampling head 24, the other end of the sampling tube 26 is communicated with one end of the rear end detection tube 15, and the other end of the rear end detection tube 15 penetrates out of the side wall of the shell 11 and is connected with the detector through a hose.
The disinfection tube 16 is connected to an external disinfection device for disinfecting the device.
Further, the sterilizing pipe 16 passes through the side wall of the housing 11 where the rear end detecting pipe 15 is located.
The disinfection authentication tube 14 is arranged at the top of the shell 11 and is close to the vertex angle of the biosafety filter, a valve is arranged on the disinfection authentication tube 14, a fungus sheet is arranged at one end of the disinfection authentication tube 14 away from the shell 11, when disinfection is carried out, the valve is opened, and after bacteria in the fungus sheet are killed, the disinfection is confirmed.
Further, the bacteria sheet is sealed and fixed at a nozzle of the sterilization authentication tube 14 at an end far from the housing 11.
Further, the sterilization authentication tube 14 has an L-shaped structure with a vertical portion vertically connected at a front right-hand apex angle of the top of the housing 11, and a horizontal portion of the L-shaped structure is disposed forward.
Through experiments, during sterilization, bacteria at the position of the sterilization authentication tube 14 are killed at the latest, and the position is the position which is the most difficult to sterilize, so that after the bacteria at the position are killed, bacteria at other positions are killed.
A pressure detection tube 17 is further disposed through the outer wall of the housing 11, and the pressure detection tube 17 is connected with a pressure detection device for detecting wind pressure at the air outlet 13 of the biosafety filter.
Further, the pressure detecting pipe 17 passes through the side wall of the housing 11 where the rear end detecting pipe 15 is located, and is connected to a pressure detecting device which is communicatively connected to the host.
The air outlet 13 of the housing 11 is disposed at the top of the housing 11 and is connected to the ventilation duct through a flange.
Further, the air outlet 13 is rectangular.
Further, the air outlet 13 is provided at the center of the top of the housing 11.
The photoelectric switch 31 is disposed on the inner wall of the housing 11 corresponding to the start and end of the periodically reciprocally arranged portion in the middle section of the transmission chain 21, and the photoelectric switch 31 is communicatively connected to the host, and the photoelectric switch 31 is used for detecting whether the sampling head 24 reaches the start and end.
Further, the photoelectric switches 31 are respectively arranged at the left side of the starting point driving wheel and the right side of the end point driving wheel.
Further, the photoelectric switch 31 is used to detect whether the sampling head 24 reaches a start point or an end point.
Further, when the sampling head 24 starts to run from the starting point, after the bio-safety filter is inspected, the sampling head is run to the final point, the photoelectric switch 31 at the final point detects that the sampling head 24 is in place, then a signal is sent to the host, the host sends a signal to stop the motor 23, the sampling head 24 stays at the final point, and when the equipment is restarted, the sampling head 24 returns to the starting point first, and then the bio-safety filter is detected.
When checking for termination of the transmission path, the host computer can control the sampling head 24 to return to the starting end along the shortest path on the running path of the transmission chain 21.
Still further, the host computer may calculate the shortest path of the sampling head 24 from the start point based on the length of the motor 23 and the drive train 21, and return to the start point along the shortest path.
Further, the host computer can calculate the shortest path of the sampling head 24 from the suspected leakage point according to the lengths of the motor 23 and the transmission chain 21, and when the suspected leakage point is re-detected, the host computer controls the motor 23 to move the sampling head 24 to the suspected leakage point along the shortest path.
The motor 23 is a stepping motor.
The detector may also detect the temperature and humidity of the air.
Further, the detector can transmit the detected air temperature and humidity inside the device to the host computer, and the air temperature and humidity are displayed and output through the host computer.
The housing 11 is made of stainless steel.
Further, the transmission chain 21, the transmission wheel 22, the mounting frame 18, the sterilization authentication tube 14, the pressure detection tube 17, the sterilization tube 16, and the rear end detection tube 15 are all made of stainless steel materials.
When the device is used, a set of equipment corresponds to a type of biosafety filter, the host machine uniformly divides the biosafety filter into a plurality of parts along the running track of the sampling head according to the type and the size of the biosafety filter, the running speed of the stepping motor, the length of the transmission chain, the diameter of the transmission wheel and the like, the running track of the biosafety filter is divided into a plurality of parts by the host machine, the equipment is started by the host machine, after the photoelectric switch 31 at the starting point detects that the sampling head 24 is positioned at the starting point, the stepping motor is started to drive the transmission wheel 22 to rotate, the transmission wheel 22 drives the transmission chain 21 to move, the sampling head 24 arranged on the transmission chain 21 moves along with the transmission chain 21, each part of the biosafety filter is detected one by one whether a leak point exists, the position without the leak point is displayed as green on the host machine, after the suspected leak point is detected, an operator can control the stepping motor to reverse through the host machine, the sampling head 24 to move back to the suspected leak point, and check again, if the suspected leak point is detected, the operator can control the stepping motor to rotate positively through the host machine, the sampling head 24 continues to run forward, after the sampling head 24 reaches the end point, the end point is detected, the line is stopped, the original table is detected, the original table is generated, the test is started, the test is carried out, and the test result is sent to the new table, and the test is carried out, and the test results are output, and the test results are sent to the table, and the test results.
The detection device for the biosafety filter provided by the embodiment of the invention has high automation level, can divide the high-efficiency filter into a plurality of parts, detect whether leakage points exist in each part one by one, can determine the specific positions of the leakage points, can return to detect suspected leakage points again, can generate detailed detection reports, and has the advantages of intelligence, accuracy and safety.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A detection device for a biosafety filter, characterized by comprising a housing (11) on which the biosafety filter can be mounted, a mounting frame (18) provided in the housing (11), a moving part provided on the mounting frame (18), and a detection control part for controlling equipment and detecting air quality;
the shell (11) is of a hollow structure, the air inlet (12) and the air outlet (13) are open, the air inlet (12) can be provided with a biosafety filter, and a rear end detection tube (15), a disinfection tube (16) and a disinfection authentication tube (14) are arranged through the outer wall of the shell (11);
the mounting frame (18) is provided with a hollow structure in the middle and is arranged parallel to the air inlet (12);
the motion part comprises a transmission chain (21) with a middle section periodically arranged in a reciprocating manner and a closed start section and a closed end section, a driving wheel (22) which is arranged at each inflection point of the transmission chain (21) and used for fixing the transmission chain (21) to the mounting frame (18) and providing guidance for the transmission chain (21), one driving wheel (22) is connected with a motor (23), a mounting seat (25) is arranged on the transmission chain (21), a sampling head (24) with a horn-shaped structure is arranged on the mounting seat (25), the sampling head (24) can rotate on the mounting seat (25) by taking a shaft axis as an axis, the radius of the flaring end of the sampling head (24) is larger than half of the distance between the parallel adjacent periodically arranged transmission chains (21), one end of a sampling tube (26) is communicated with the sampling head (24), and the other end of the sampling tube (26) is communicated with the rear end detection tube (15);
the detection control part comprises a host machine and a detector which is in communication connection with the host machine, the detector is connected with the rear end detection tube (15), the detector is used for detecting the air quality after filtering, the host machine equally divides the biosafety filter into a plurality of parts along the movement direction of the transmission chain (21) and controls the motor (23) to operate, the sampling head (24) sequentially inspects all parts of the biosafety filter, when the sampling head (24) inspects a suspected leakage point, the host machine can display the position of the leakage point and can control the motor (23) to move the sampling head (24) to the suspected leakage point for re-detection, and the host machine can output the detected air quality information; the disinfection authentication tube (14) is arranged at the top of the shell (11) and is close to the top angle of the biosafety filter, a valve is arranged on the disinfection authentication tube (14), a fungus sheet is arranged at one end of the disinfection authentication tube (14) far away from the shell (11), when disinfection is carried out, the valve is opened, and after bacteria in the fungus sheet are killed, the disinfection is confirmed to be finished; the photoelectric switch (31) is arranged on the inner wall of the shell (11) corresponding to the start end and the end of the periodic reciprocating arrangement part in the middle section of the transmission chain (21), the photoelectric switch (31) is in communication connection with the host, and the photoelectric switch (31) is used for detecting whether the sampling head (24) reaches the start end or not; the disinfection tube (16) is connected with external disinfection equipment and is used for disinfecting the equipment; the pressure detection tube (17) is further arranged on the outer wall penetrating through the shell (11), and the pressure detection tube (17) is connected with pressure detection equipment and used for detecting wind pressure at the air outlet (13) of the biosafety filter.
2. The detection device for a biosafety filter according to claim 1, characterized in that the air outlet (13) of the housing (11) is arranged at the top of the housing (11) and is connected to a ventilation duct by means of a flange.
3. A detection device for a biosafety filter according to claim 1, characterized in that the host computer is adapted to control the sampling head (24) to return to the beginning along the shortest path on the path of travel of the drive train (21) when checking for mid-way termination.
4. A detection device for a biosafety filter according to claim 1, characterized in that the motor (23) is a stepper motor.
5. The device of claim 1, wherein the detector is further configured to detect temperature and humidity of air.
6. A detection device for a biosafety filter according to claim 1, characterized in that the housing (11) is made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090413.1A CN108106786B (en) | 2018-01-30 | 2018-01-30 | Detection device for biological safety filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090413.1A CN108106786B (en) | 2018-01-30 | 2018-01-30 | Detection device for biological safety filter |
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| CN108106786A CN108106786A (en) | 2018-06-01 |
| CN108106786B true CN108106786B (en) | 2024-02-20 |
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| CN201810090413.1A Active CN108106786B (en) | 2018-01-30 | 2018-01-30 | Detection device for biological safety filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109821850B (en) * | 2019-01-29 | 2023-11-21 | 唐山同海净化设备有限公司 | Biological safety exhaust system |
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| Title |
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| 在线实时检测高效过滤器的负压排风系统设计;黄宝兴;苏力;;洁净与空调技术(04);全文 * |
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| CN108106786A (en) | 2018-06-01 |
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