CN220932269U

CN220932269U - Filter integrity detection device

Info

Publication number: CN220932269U
Application number: CN202322494429.8U
Authority: CN
Inventors: 岳刚; 高雪飞; 马世新; 柳海泉; 刘飞飞; 孔维益
Original assignee: Qingdao Haier Biomedical Co Ltd
Current assignee: Qingdao Haier Biomedical Co Ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-05-10
Anticipated expiration: 2033-09-13

Abstract

The application belongs to the technical field of filters, and particularly relates to a filter integrity detection device. The filter integrity detection device comprises a workbench, an aerosol generation assembly, a detection assembly and a support assembly, wherein a detection port is formed in the workbench; the support assembly comprises a first support and a second support arranged on the first support, the first support and the second support jointly clamp a filter to be detected, one end of the first support is connected with the workbench, and the first support is arranged on the periphery of the detection opening in a surrounding mode; the aerosol generating assembly is arranged below the workbench and is used for inputting aerosol to the detection port and discharging the aerosol through the first bracket, the filter and the second bracket in sequence; the detection component is used for detecting the concentration of the aerosol in the first bracket and the second bracket respectively. The filter integrity detection device solves the problem that the detection method of the filter and the requirement for detecting the filter integrity are inconsistent.

Description

Filter integrity detection device

Technical Field

The application belongs to the technical field of filters, and particularly relates to a filter integrity detection device.

Background

The filter is used as a key component of the biosafety cabinet, and the integrity of the filter is one of the main detection items of the biosafety cabinet. The YY0569-2011 standard requirement high-efficiency filter integrity detection method comprises the steps of generating aerosol into a cabinet by using an aerosol generator, detecting the aerosol downstream of the high-efficiency filter by using an aerosol photometer, and judging whether the filter leaks or not according to the detected concentration of the aerosol and the efficiency of the filter.

In the prior art, the filter adopts a water seal fuming method, and whether the filter leaks or not is judged by naked eyes so as to detect whether the filter is qualified or not.

However, inconsistent requirements for testing the integrity of the filter may result in a qualified filter, but a leak condition when installed in a safety cabinet.

Disclosure of utility model

The application provides a filter integrity detection device which is used for solving the problem that the detection method of a filter and the requirement for detecting the integrity of the filter are inconsistent.

The application provides a filter integrity detection device which comprises a workbench, an aerosol generation assembly, a detection assembly and a support assembly, wherein a detection port is formed in the workbench.

The support assembly comprises a first support and a second support arranged on the first support, the first support and the second support clamp the filter to be detected together, one end of the first support is connected with the workbench, and the first support is arranged on the periphery of the detection opening in a surrounding mode.

The aerosol generating assembly is arranged below the workbench and is used for inputting aerosol into the detection port and discharging the aerosol through the first bracket, the filter and the second bracket in sequence.

The detection component is used for detecting the concentration of the aerosol in the first bracket and the second bracket respectively.

In one possible implementation manner, the filter integrity detection device provided by the application comprises a detection component, wherein the detection component comprises a first detection piece, a first sampling port communicated with the inside of the first bracket is arranged on the side wall of the first bracket, and the first detection piece is used for detecting the concentration of aerosol of the first sampling port.

In one possible implementation manner, the filter integrity detection device provided by the application comprises a detection component, wherein the detection component comprises a second detection piece, a baffle is arranged at one end of the second support, which is away from the first support, and the baffle encloses a second sampling port, and the second detection piece is used for detecting the concentration of aerosol of the second sampling port.

In one possible implementation manner, the filter integrity detection device provided by the application is characterized in that a flange is arranged at one end of the first bracket, which faces the workbench; the flanging is detachably connected with the workbench.

In one possible implementation manner, the filter integrity detection device provided by the application is characterized in that the flanging is connected with the workbench through screws.

In one possible implementation manner, the filter integrity detection device provided by the application further comprises at least one locking assembly, wherein the locking assembly comprises a lock seat and a lock catch matched with the lock seat, one of the lock seat and the lock catch is arranged on the outer side wall of the first bracket, and the other of the lock seat and the lock catch is arranged on the outer side wall of the second bracket.

In one possible implementation manner, the filter integrity detection device provided by the application comprises an aerosol generator, a fan and a transmission channel, wherein one end of the transmission channel is communicated with an air outlet of the fan, and the other end of the transmission channel is communicated with a detection port.

The aerosol generator is used for generating aerosol, and the fan is used for providing the aerosol to the detection port through the transmission channel.

In one possible implementation manner, the filter integrity detection device provided by the application further comprises a controller, wherein the controller is electrically connected with the fan and is used for controlling the fan to be started or stopped.

In one possible implementation, the filter integrity detection device provided by the application, the air inlet of the fan is opposite to the outlet of the aerosol generator.

In one possible implementation manner, the filter integrity detection device provided by the application, the fan and the bottom of the transmission channel are provided with supporting pieces.

According to the filter integrity detection device provided by the application, the workbench, the aerosol generation assembly, the detection assembly and the support assembly are arranged, the first bracket and the second bracket of the support assembly clamp the filter together, the filter is fixed on the workbench, and the support assembly and the filter are both positioned above the detection port of the workbench; aerosol generated by the aerosol generating assembly below the workbench is discharged through the first bracket, the filter and the second bracket in sequence through the detection port, the concentration of the aerosol at the upstream of the filter in the first bracket is detected by the detection assembly, the concentration of the aerosol at the downstream of the filter in the second bracket is detected by the detection assembly, and the filtering effect of the filter can be obtained through the detected concentration change of the aerosol, so that whether the filter leaks or not is judged, and the problem that the detection method of the filter and the requirement for detecting the integrity of the filter are inconsistent is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Fig. 1 is a schematic structural diagram of a filter integrity detection device according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of FIG. 1 at another angle;

FIG. 3 is a schematic view of the structure of FIG. 1 at a further angle;

Fig. 4 is a schematic structural view of the connection between the support assembly and the filter of fig. 1.

Reference numerals illustrate:

100-working table;

200-an aerosol generating assembly; 210-an aerosol generator; 220-fans; 230-transmission channel; 231-a support;

300-a support assembly; 310-a first bracket; 311-flanging; 320-a second rack; 321-a baffle; 322-a second sampling port;

400-a filter;

500-locking assembly; 510-a lock base; 520-locking;

600-controller.

Specific embodiments of the present application have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented, for example, in sequences other than those illustrated or otherwise described herein.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

As demonstrated by the background art, the YY0569-2011 standard of class II biosafety cabinet requires that the high-efficiency filter detection method is that aerosol is generated into the cabinet by using an aerosol generator, an aerosol photometer is used for detection at the downstream of the high-efficiency filter, and whether the filter leaks or not is judged according to the detected concentration of the aerosol and the efficiency of the filter. In the prior art, the filter adopts a water seal fuming method, and whether the filter leaks or not is judged by naked eyes so as to detect whether the filter is qualified or not. However, inconsistent requirements for testing the integrity of the filter may result in a qualified filter, but a leak condition when installed in a safety cabinet.

Based on the above, the filter integrity detection device provided by the application has the advantages that the workbench, the aerosol generation assembly, the detection assembly and the support assembly are arranged, the first bracket and the second bracket of the support assembly clamp the filter together, the filter is fixed on the workbench, and the support assembly and the filter are both positioned above the detection port of the workbench; aerosol generated by the aerosol generating component below the workbench is discharged through the first bracket, the filter and the second bracket in sequence through the detection port, the concentration of the aerosol at the upstream of the filter in the first bracket is detected by the detection component, the concentration of the aerosol at the downstream of the filter in the second bracket is detected by the detection component, and the filtering effect of the filter can be obtained through the detected concentration change of the aerosol, so that whether the filter leaks or not is judged.

The filter integrity detection device provided by the application will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a filter integrity detection device according to an embodiment of the present application; FIG. 2 is a schematic view of the structure of FIG. 1 at another angle; fig. 3 is a schematic view of the structure of fig. 1 at another angle.

Referring to fig. 1 to 3, the filter 400 integrity detection device provided by the present application includes a workbench 100, an aerosol generating assembly 200, a detection assembly and a support assembly 300, wherein a detection port is provided on the workbench 100.

The support assembly 300 includes a first bracket 310 and a second bracket 320 disposed on the first bracket 310, the first bracket 310 and the second bracket 320 jointly clamp the filter 400 to be detected, one end of the first bracket 310 is connected with the workbench 100, and the first bracket 310 is enclosed on the periphery of the detection port.

The aerosol generating assembly 200 is disposed below the table 100, the aerosol generating assembly 200 is used to input aerosol to the detection port, and the aerosol is sequentially discharged through the first holder 310, the filter 400, and the second holder 320.

The detection assembly is used to detect the concentration of aerosol within the first and second holders 310, 320, respectively.

The table 100 is provided with a detection port, not shown in the drawing, through which the aerosol generated by the aerosol generating assembly 200 located below the table 100 can enter the first holder 310 located above the table 100.

Further, the first support 310 is disposed around the periphery of the detection port, so as to ensure that the aerosol delivered to the detection port must be filtered by the filter 400 and then discharged, so that on one hand, the concentration of the aerosol in the airflow upstream of the filter 400 is ensured, and on the other hand, the aerosol is prevented from polluting the air without being filtered.

Still further, the first holder 310 and the second holder 320 hold the filter 400 to be tested together, preventing the aerosol from overflowing from the peripheral side of the filter 400, and avoiding affecting the test result.

It should be further noted that, the detection component is not shown in the figure, and the detection component detects the concentration of the aerosol in the first support 310, that is, the concentration of the aerosol before the filtration of the filter 400; the concentration of the aerosol in the second holder 320 detected by the detecting means is the concentration of the aerosol filtered by the filter 400, and the filtering effect of the filter 400 can be obtained by the detected concentration change of the aerosol, thereby judging whether the filter 400 leaks.

It will be appreciated that an inconsistent detection method with respect to the prior art filter 400 and detection criteria for the safety cabinet results in a qualified filter 400, but a leak condition occurs when installed in the safety cabinet. In the filter 400 integrity detection device of the embodiment, by arranging the workbench 100, the aerosol generating assembly 200, the detection assembly and the support assembly 300, the first bracket 310 and the second bracket 320 of the support assembly 300 clamp the filter 400 together, the filter 400 is fixed on the workbench 100, and the support assembly 300 and the filter 400 are both positioned above a detection port of the workbench 100; the aerosol generated by the aerosol generating assembly 200 below the workbench 100 is sequentially discharged through the first bracket 310, the filter 400 and the second bracket 320 by the detection opening, the concentration of the aerosol at the upstream of the filter 400 in the first bracket 310 is detected by the detection assembly, the concentration of the aerosol at the downstream of the filter 400 in the second bracket 320 is detected by the detection assembly, and the filtering effect of the filter 400 can be obtained by the detected concentration change of the aerosol, so that whether the filter 400 leaks or not is judged, the problem that the detection method of the filter 400 and the requirement for detecting the integrity of the filter 400 are inconsistent is solved, the pre-detection is carried out before the filter 400 is installed, and the leakage rate of the filter 400 installed on the workbench 100 is reduced.

In some embodiments, referring to fig. 4, the detection assembly includes a first detection member, where a first sampling port is provided on a sidewall of the first support 310 and is in communication with an interior of the first support 310, and the first detection member is configured to detect a concentration of aerosol in the first sampling port.

It should be noted that according to YY0569-2011, level ii biosafety cabinet, dioctyl phthalate (DOP) or a comparable liquid can produce a liquid with aerosol particles having the same size distribution as the DOP aerosol particles.

Further, the first detecting member, not shown in the drawings, may employ a linear or logarithmic scale aerosol photometer, and the first detecting member may be configured to detect 0.001% of the same aerosol particles by marking as 100% polydisperse aerosol particles having a concentration of 10 μg/L DOP (or equivalent liquid) in the air flow upstream of the filter 400.

It should also be noted that the aerosol is uniformly distributed inside the first support 310, i.e. the aerosol concentration is the same throughout the inside of the first support 310. And the light scattering intensity of the aerosol in the air stream upstream of the filter 400 is required to be at least 10 mug/L DOP according to YY0569-2011 Standard of biological safety Condition II, which means that the concentration of the aerosol measured at the first sampling port should be at least 10 mug/L DOP, that is, the concentration of the aerosol before filtration of the filter 400 is at least 10 mug/L.

In some embodiments, referring to fig. 4, the detection assembly includes a second detection member, where a baffle 321 is enclosed by an end of the second support 320 facing away from the first support 310, and the baffle 321 encloses a second sampling port 322, and the second detection member is used to detect a concentration of aerosol in the second sampling port 322.

It should be noted that, the baffle 321 is disposed around the end of the second support 320 away from the first support 310, that is, the baffle 321 is disposed at the top of the second support 320, so that when detecting the concentration of the aerosol downstream of the filter 400, the surrounding air can be prevented from affecting the detection result.

It should be noted that, the second detecting member is not shown in the drawings, and the second detecting member detects the concentration of the aerosol in the second sampling port 322, and the method of scanning the detection filter 400 may be adopted.

In particular, the probe of the aerosol photometer is moved no more than 25mm downstream of the filter 400 from the surface of the filter 400 at a scan rate of less than 50mm/s so that the probe sweeps the entire downstream side of the filter 400 and the sweep-side paths should overlap slightly.

In some embodiments, referring to fig. 1 and 4, the first bracket 310 is provided with a flange 311 toward one end of the table 100.

The flange 311 is detachably connected to the table 100.

Specifically, the first support 310 is detachable, and when the integrity of the filter 400 is required to be detected, the first support 310 is placed on the table 100, and after the detection of the filter 400 is completed, the first support 310 is detached from the table 100.

The first bracket 310 and the table 100 may be coupled by welding, for example.

In some embodiments, referring to fig. 1 and 4, the flange 311 is screwed to the table 100.

Specifically, a plurality of screw holes are arranged on the flange 311 and the workbench 100 in a one-to-one correspondence manner, and screws penetrate through the screw holes to connect the flange 311 with the workbench 100, so that the first bracket 310 is arranged on the workbench 100, sliding of the first bracket 310 during detection is avoided, and meanwhile, the mounting is convenient and the dismounting is convenient.

In some embodiments, referring to fig. 4, at least one locking assembly 500 is further included, where the locking assembly 500 includes a lock base 510 and a lock catch 520 that mates with the lock base 510, one of the lock base 510 and the lock catch 520 being disposed on an outer side wall of the first bracket 310, the other being disposed on an outer side wall of the second bracket 320.

The locking assembly 500 may be provided in one, two, or four, as long as the filter 400 can be fixed between the first bracket 310 and the second bracket 320, which is not limited in the present application.

Illustratively, the outer sidewall of the first bracket 310 is provided with a latch 520, and the outer sidewall of the second bracket 320 is provided with a latch seat 510.

Illustratively, the outer sidewall of the first bracket 310 is provided with a locking seat 510, not shown, and the outer sidewall of the second bracket 320 is provided with a locking catch 520.

It should be noted that, the lock base 510 and the lock catch 520 may be connected to the first bracket 310 and the second bracket 320 by welding, respectively, and the locking degree of the locking assembly 500 may be adjusted.

Specifically, when the integrity of the filter 400 is to be detected, the lock catch 520 is snapped onto the lock base 510 to lock the locking assembly 500; when the other filter 400 is replaced or the detection of the filter 400 is completed, the lock catch 520 is separated from the lock base 510, so that the filter 400 can be disassembled.

By way of example, the first bracket 310 and the second bracket 320 may also be locked by other locking means, as long as the first bracket 310 and the second bracket 320 can be locked, which is not limited by the present application.

In some embodiments, referring to fig. 1, the aerosol generating assembly 200 includes an aerosol generator 210, a blower 220, and a transfer channel 230, one end of the transfer channel 230 being in communication with an air outlet of the blower 220, and the other end of the transfer channel 230 being in communication with a detection port.

The aerosol generator 210 is for generating an aerosol, and the blower 220 is for providing the aerosol to the detection port via the transmission channel 230.

It should be noted that, according to YY0569-2011 standard of class ii biosafety cabinet, when the aerosol generator 210 is used for generating aerosol, the pressure is adjusted to be at least 140kPa, the aerosol is generated by using DOP or a liquid equivalent thereto, and the depth of the nozzle of the aerosol generator 210 immersed in the liquid is not more than 25mm.

Specifically, the transmission channel 230 is respectively connected to the air outlet and the detection port of the blower 220, so that the aerosol generated by the aerosol generator 210 can be conveyed to the detection port through the transmission channel 230 by using the negative pressure of the air inlet when the blower 220 works.

In some embodiments, referring to fig. 1, the fan control system further comprises a controller 600, wherein the controller 600 is electrically connected with the fan 220, and the controller 600 is used for controlling the fan 220 to be turned on or turned off.

Specifically, the controller 600 controls the fan 220 to be turned on or off, so as to control whether aerosol is delivered to the detection port. When the integrity of the filter 400 needs to be detected, the fan 220 is started, and aerosol generated by the aerosol generator 210 is conveyed to a detection port by the fan 220; after the filter 400 is detected, the blower 220 is turned off, and the blower 220 stops delivering the aerosol generated by the aerosol generator 210 to the detection port.

Further, the controller 600 may also control the wind speed of the blower 220, and when the aerosol concentration measured by the first sampling port is too low, the rotational speed of the blower 220 is adjusted by the controller 600, so that the rotational speed is increased, thereby increasing the aerosol concentration upstream of the filter 400; when the aerosol concentration measured at the first sampling port is too high, the rotational speed of the blower 220 is adjusted by the controller 600 to decrease the rotational speed thereof, thereby decreasing the aerosol concentration upstream of the filter 400.

In some embodiments, referring to fig. 1, the air inlet of the blower 220 is opposite the outlet of the aerosol generator 210.

Specifically, the air inlet of the blower 220 is opposite to the outlet of the aerosol generator 210, which is beneficial to conveying the aerosol generated by the aerosol generator 210 to the detection port by using the negative pressure of the air inlet of the blower 220.

Illustratively, the aerosol generated by the aerosol generator 210 may also be delivered using positive pressure from the blower 220, as long as the aerosol is delivered to the detection port, as the application is not limited in this regard.

In some embodiments, referring to fig. 2, the blower 220 and the bottom of the transfer passage 230 are each provided with a support 231.

Specifically, the bottom of the blower 220 is provided with the supporting member 231 to provide support for the blower 220, so that the air inlet of the blower 220 is ensured to be opposite to the outlet of the sol removing generator, and the air outlet of the blower 220 is ensured to be communicated with the transmission channel 230.

Further, the bottom of the transmission channel 230 is provided with a supporting member 231 for supporting the transmission channel 230, so as to ensure that the transmission channel 230 is communicated with the detection port.

As can be appreciated by those skilled in the art, in the filter 400 integrity detection device provided by the present application, by providing the workbench 100, the aerosol generating assembly 200, the detection assembly and the support assembly 300, the first bracket 310 and the second bracket 320 of the support assembly 300 clamp the filter 400 together, the filter 400 is fixed on the workbench 100, and the support assembly 300 and the filter 400 are both located above the detection port of the workbench 100; the aerosol generated by the aerosol generating assembly 200 below the workbench 100 is sequentially discharged through the first bracket 310, the filter 400 and the second bracket 320 by the detection opening, the concentration of the aerosol at the upstream of the filter 400 in the first bracket 310 is detected by the detection assembly, the concentration of the aerosol at the downstream of the filter 400 in the second bracket 320 is detected by the detection assembly, and the filtering effect of the filter 400 can be obtained by the detected concentration change of the aerosol, so that whether the filter 400 leaks or not is judged, the problem that the detection method of the filter 400 and the requirement for detecting the integrity of the filter 400 are inconsistent is solved, the pre-detection is carried out before the filter 400 is installed, and the leakage rate of the filter 400 installed on the workbench 100 is reduced.

While the present application has been described with reference to the preferred embodiments shown in the drawings, it will be readily understood by those skilled in the art that the scope of the application is not limited to those specific embodiments, and the above examples are intended only to illustrate the technical aspects of the application, not to limit it; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims

1. The filter integrity detection device is characterized by comprising a workbench, an aerosol generation assembly, a detection assembly and a support assembly, wherein a detection port is formed in the workbench;

The support assembly comprises a first support and a second support arranged on the first support, the first support and the second support jointly clamp a filter to be detected, one end of the first support is connected with the workbench, and the first support is arranged on the periphery of the detection port in a surrounding mode;

The aerosol generating assembly is arranged below the workbench and is used for inputting aerosol into the detection port, and the aerosol is discharged through the first bracket, the filter and the second bracket in sequence;

the detection assembly is used for detecting the concentration of the aerosol in the first bracket and the second bracket respectively.

2. The filter integrity detection device of claim 1 wherein the detection assembly comprises a first detection member having a first sampling port on a side wall of the first support in communication with the interior of the first support, the first detection member configured to detect a concentration of the aerosol in the first sampling port.

3. The filter integrity detection device of claim 1 wherein the detection assembly comprises a second detection member, a baffle is disposed around an end of the second support facing away from the first support, the baffle defines a second sampling port, and the second detection member is configured to detect a concentration of the aerosol in the second sampling port.

4. The filter integrity test device of claim 1 wherein the first bracket has a flange at an end thereof facing the table;

the flanging is detachably connected with the workbench.

5. The filter integrity test device of claim 4 wherein said flange is screwed to said table.

6. The filter integrity detection device of claim 1 further comprising at least one locking assembly comprising a lock base and a latch mated with the lock base, one of the lock base and the latch disposed on an outer sidewall of the first bracket and the other disposed on an outer sidewall of the second bracket.

7. The filter integrity detection device of any one of claims 1 to 6, wherein the aerosol generating assembly comprises an aerosol generator, a blower, and a transmission channel, one end of the transmission channel being in communication with an air outlet of the blower, the other end of the transmission channel being in communication with the detection port;

The aerosol generator is used for generating the aerosol, and the fan is used for providing the aerosol to the detection port through the transmission channel.

8. The filter integrity detection device of claim 7 further comprising a controller electrically connected to the blower, the controller for controlling the blower to open and close.

9. The filter integrity detection device of claim 7 wherein an air inlet of the blower is opposite an outlet of the aerosol generator.

10. The filter integrity detection device of claim 7 wherein the bottom of the blower and the transfer passage are each provided with a support.