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filter cartridge

A filter and filter cartridge technology, used in breathing filters, fixed filter cartridge filters, filtration separation, etc., can solve the problem of insufficient air purification function, difficult installation of filter cartridges, insufficient adhesion, etc. problem, to maintain filter performance, minimize interference, and improve filter performance

Active Publication Date: 2021-09-28
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the frame is formed of rigid cardboard, non-woven fabric, or resin, the adhesive force between the filter cartridge and the outer wall of the space where the filter cartridge is installed is insufficient, and thus causes air leakage, so that there is air purification. Problems where functions do not fully function
In addition, there is also a problem that when the filter is installed on a rigid frame, the installation of the filter cartridge is difficult due to the friction between the filter cartridge and the rigid frame

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment Embodiment 1

[0096] Pressure drop is measured by varying the radius of curvature of the filter cartridge, where the filters are of the same size in one plane. The results are shown in Table 1 below.

[0097] The greater the pressure drop, the lower the filtration performance. Referring to Table 1 below, although the increase in pressure drop is not large at a radius of curvature of about 40 mm or greater, the pressure drop significantly increases at a radius of curvature of less than about 40 mm. Accordingly, filter cartridges according to the present invention preferably have a radius of curvature of about 40 mm or greater.

[0098] Table 1

[0099] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Radius of curvature (mm) 38 40.7 44.5 50.6 60 8 Pressure drop (mmH 2 O)

experiment Embodiment 2

[0101] Filtration of a filter housed in a case including only a holder (Comparative Example 1), a filter not housed in a case (Comparative Example 2), and a filter housed in a case including a cover and a holder was measured. In order to improve the performance of the device, the cover includes a plurality of suction ports provided at the side wall (Example 7). The results are shown in Figure 8 middle.

[0102] exist Figure 7 , the horizontal axis indicates the ratio of the particle loading value of the pollutant (NaCl) to the initial particle loading value, and the vertical axis indicates the ratio of the pressure drop value PD to the initial minimum pressure drop value PD_min. refer to Figure 8 , although when the loading ratio of the pollutant (NaCl) was low, the pressure drop ratio showed similarly low values ​​and the filter performance was similar in all Comparative Example 1, Comparative Example 2 and Example 7, but as the pollutant The load ratio is higher, and ...

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Abstract

The present disclosure relates to a filter cartridge for a respirator, the filter cartridge including a filter and a housing configured to store the filter, wherein the filter includes a corrugated filter member and a flexible frame, the corrugated A filter member having a plurality of corrugated tips, and at the corrugated filter member, a first pattern of valleys is formed between each of the plurality of corrugated tips, the flexible frame is coupled to the corrugated The edge of the filter member and includes a connector and a support protruding from the connector, the support includes a plurality of protrusions respectively coupled to corrugated tips, the housing includes a first surface, a second surface, and is configured to surround the second surface. The edge of one surface and the sidewall of the edge of the second surface, and the housing includes one or more suction ports and one or more output ports.

Description

[0001] The present disclosure relates to a filter cartridge for fluid filtration, and more particularly, to a filter cartridge for a respirator. Background technique [0002] Respirators typically include a mask body and one or more filter cartridges attached to the mask body. The mask body can be worn over the nose and mouth on a person's face, and in some cases, the mask body can include a portion that covers the head, neck, or other body parts. The wearer can inhale clean air that has passed through the filter provided at the filter cartridge. In negative pressure respirators, air is drawn through the filter cartridge by the negative pressure generated by the wearer during inhalation. Air from the external environment passes through the filter media and flows into the interior space of the mask body through which the wearer can inhale air. [0003] Various technologies have been employed in filter cartridges used in respirators. Conventional filter cartridges generally i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62B23/02B01D29/07
CPCA62B23/02B01D46/00B01D46/10B01D46/103B01D46/42B01D46/523A62B19/00A62B7/10B01D46/52B01D46/0005A62B9/04
Inventor 李庚美姜奉协朴康守
Owner 3M INNOVATIVE PROPERTIES CO